Documents published in 2009 : Scipedia

Olgierd Cecil Zienkiewicz obituary
M. Kleiber, E. Oñate

Archives of Comp. Meths. Engng. (2009). Vol. 16, pp. 465
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Control of the finite element discretization error during the convergence of structural shape optimization algorithms
G. Bugeda, J. Ródenas, J. Albelda, E. Oñate

Int. J. Simul. Multidisci. Des. Optim. (2009). Vol. 3 (3), pp. 363-369

Abstract
This work analyzes the influence of the discretization error contained in the Finite Element (FE) analyses of each design configuration proposed by structural shape optimization algorithms over the behaviour of the algorithm. If the FE analyses are not accurate enough, the final solution will neither be optimal nor satisfy the constraints. The need for the use of adaptive FE analysis techniques in shape optimum design will be shown. The paper also proposes the use of the algorithm described in [1] in order to reduce the computational cost associated to the adaptive FE analysis of each geometrical configuration when evolutive optimization algorithms are used.
Abstract
This work analyzes the influence of the discretization error contained in the Finite Element (FE) analyses of each design configuration proposed by structural shape optimization [...]
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Guaranteed energy error bounds for the Poisson equation using a flux-free approach: solving the local problems in subdomains
N. Parés, H. Santos, P. Diez

Int. J. Numer. Meth. Engng. (2009). Vol. 79 (10), pp. 1203-1244

Abstract
A method to compute guaranteed upper bounds for the energy norm of the exact error in the finite element solution of the Poisson equation is presented. The bounds are guaranteed for any finite element mesh however coarse it may be, not just in the asymptotic regime. The bounds are constructed by employing a subdomain based a posteriori error estimate which yields self-equilibrated residual loads in stars (patches of elements). The proposed approach is an alternative to standard equilibrated residual methods providing sharper bounds. The use of a flux-free error estimator improves the effectivities of the upper bounds for the energy while retaining the certainty of the bounds.
Abstract
A method to compute guaranteed upper bounds for the energy norm of the exact error in the finite element solution of the Poisson equation is presented. The bounds are guaranteed [...]
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Exact bounds for linear outputs of the advection-diffusion-reaction equation using flux-free error estimates
N. Parés, P. Diez, A. Huerta

Journal on Scientific Computing (SIAM) (2009). Vol. 31 (4), pp. 3064-3089

Abstract
The paper introduces a methodology to compute strict upper and lower bounds for linear-functional outputs of the exact solutions of the advection-reaction-diffusion equation. The proposed approach is an alternative to the standard residual type estimators (hybrid-flux), circumventing the need of flux-equilibration following a fluxfree error estimation strategy. The presented estimator provides sharper estimates than the ones provided by both the standard hybrid-flux techniques and other flux-free techniques.
Abstract
The paper introduces a methodology to compute strict upper and lower bounds for linear-functional outputs of the exact solutions of the advection-reaction-diffusion equation. [...]
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Hierarchical X-FEM for n-phase flow (n>2)
S. Zlotnik, P. Diez

Comput. Methods Appl. Mech. Engrg., (2009). Vol. 198 (30-32), pp. 2329-2338

Abstract
The eXtended Finite Element Method (X-FEM) has been successfully used in two-phase flow problems involving a moving interface. In order to simulate problems involving more than two phases, the X-FEM has to be further eXtended. The proposed approach is presented in the case of a quasi-static Stokes n-phase flow and it is based on using an ordered collection of level set functions to describe the location of the phases. A level set hierarchy allows describing triple junctions avoiding overlapping or “voids” between materials. Moreover, an enriched solution accounting for several simultaneous phases inside one element is proposed. The interpolation functions corresponding to the enriched degrees of freedom require redefining the associated ridge function accounting for all the level sets. The computational implementation of this scheme involves calculating integrals in elements having several materials inside. An adaptive quadrature accounting for the interfaces locations is proposed to accurately compute these integrals. Examples of the hierarchical X-FEM approach are given for a n-phase Stokes problem in 2 and 3 dimensions.
Abstract
The eXtended Finite Element Method (X-FEM) has been successfully used in two-phase flow problems involving a moving interface. In order to simulate problems involving more [...]
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Strict error bounds for linear solid mechanics problems using a subdomain-based flux-free method
R. Cottereau, P. Diez, A. Huerta

Computational Mechanics (2009). Vol. 44 (4), pp. 533-547

Abstract
We discuss, in this paper, a flux-free method for the computation of strict upper bounds of the energy norm of the error in a Finite Element (FE) computation. The bounds are strict in the sense that they refer to the difference between the displacement computed on the FE mesh and the exact displacement, solution of the continuous equations, rather than to the difference between the displacements computed on two FE meshes, one coarse and one refined. This method is based on the resolution of a series of local problems on patches of elements and does not require the resolution of a previous problem of flux equilibration, as happens with other methods. The paper concentrates more specifically on linear solid mechanics issues, and on the assessment of the energy norm of the error, seen as a necessary tool for the estimation of the error in arbitrary quantities of interest (linear functional outputs). Applications in both 2D and 3D are presented
Abstract
We discuss, in this paper, a flux-free method for the computation of strict upper bounds of the energy norm of the error in a Finite Element (FE) computation. The bounds are [...]
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A simple strategy to assess the error in the numerical wave number of the finite element solution of the Helmholtz equation
L. Steffens, P. Diez

Comput. Methods Appl. Mech. Engrg., (2009). Vol. 198 (15-16), pp. 1389-1400

Abstract
The standard approach for goal oriented error estimation and adaptivity uses an error representation via an adjoint problem, based on the linear functional output representing the quantity of interest. For the assessment of the error in the approximation of the wave number for the Helmholtz problem (also referred to as dispersion or pollution error), this strategy cannot be applied. This is because there is no linear extractor producing the wave number from the solution of the acoustic problem. Moreover, in this context, the error assessment paradigm is reverted in the sense that the exact value of the wave number, κ, is known (it is part of the problem data) and the effort produced in the error assessment technique aims at obtaining the numerical wave number, κH, as a postprocess of the numerical solution, uH. The strategy introduced in this paper is based on the ideas used in the a priori analysis. A modified equation corresponding to a modified wave number κm is introduced. Then, the value of κm such that the modified problem better accommodates the numerical solution uH is taken as the estimate of the numerical wave number κH. Thus, both global and local versions of the error estimator are proposed. The obtained estimates of the dispersion error match the a priori predicted dispersion error and, in academical examples, the actual values of the error in the wave number.
Abstract
The standard approach for goal oriented error estimation and adaptivity uses an error representation via an adjoint problem, based on the linear functional output representing [...]
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The fixed‐mesh ALE approach applied to solid mechanics and fluid–structure interaction problems
J. Baiges, R. Codina

Int. J. Numer. Meth. Engng. (2009). Vol. 81 (12), pp. 1529-1557

Abstract
In this paper we propose a method to solve Solid Mechanics and fluid–structure interaction problems using always a fixed background mesh for the spatial discretization. The main feature of the method is that it properly accounts for the advection of information as the domain boundary evolves. To achieve this, we use an Arbitrary Lagrangian–Eulerian (ALE) framework, the distinctive characteristic being that at each time step results are projected onto a fixed, background mesh. For solid mechanics problems subject to large strains, the fixed‐mesh (FM)‐ALE method avoids the element stretching found in fully Lagrangian approaches. For FSI problems, FM‐ALE allows for the use of a single background mesh to solve both the fluid and the structure.
Abstract
In this paper we propose a method to solve Solid Mechanics and fluid–structure interaction problems using always a fixed background mesh for the spatial discretization. [...]
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Approximate imposition of boundary conditions in immersed boundary methods
R. Codina, J. Baiges

Int. J. Numer. Meth. Engng. (2009). Vol. 80 (11), pp. 1379-1405

Abstract
We analyze several possibilities to prescribe boundary conditions in the context of immersed boundary methods. As basic approximation technique we consider the finite element method with a mesh that does not match the boundary of the computational domain, and therefore Dirichlet boundary conditions need to be prescribed in an approximate way. As starting variational approach we consider Nitsche's methods, and we then move to two options that yield non‐symmetric problems but that turned out to be robust and efficient. The essential idea is to use the degrees of freedom of certain nodes of the finite element mesh to minimize the difference between the exact and the approximated boundary condition
Abstract
We analyze several possibilities to prescribe boundary conditions in the context of immersed boundary methods. As basic approximation technique we consider the finite element [...]
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Computational aeroacoustics of viscous low speed flows using subgrid scale finite element methods
O. Guasch, R. Codina

Journal of Computational Acoustics (2009). Vol. 17 (3), pp. 309-330

Abstract
A methodology to perform computational aeroacoustics (CAA) of viscous low speed flows in the framework of stabilized finite element methods is presented. A hybrid CAA procedure is followed that makes use of Lighthill's acoustic analogy in the frequency domain. The procedure has been conceptually divided into three steps. In the first one, the incompressible Navier–Stokes equations are solved to obtain the flow velocity field. In the second step, Lighthill's acoustic source term is computed from this velocity field and then Fourier transformed to the frequency domain. Finally, the acoustic pressure field is obtained by solving the corresponding inhomogeneous Helmholtz equation. All equations in the formulation are solved using subgrid scale stabilized finite element methods. The main ideas of the subgrid scale numerical strategy are outlined and its benefits when compared to the Galerkin approach are described. As numerical examples, the aerodynamic noise generated by flow past a two-dimensional cylinder and by flow past two cylinders in parallel arrangement are addressed.
Abstract
A methodology to perform computational aeroacoustics (CAA) of viscous low speed flows in the framework of stabilized finite element methods is presented. A hybrid CAA procedure [...]
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Mathematical models for thermally coupled low speed flows
J. Principe, R. Codina

Adv. Theor. Appl. Mech. (2009). Vol. 2 (2), pp. 93-112

Abstract
In this paper we review and clarify some aspects of the asymptotic analysis of the compressible Navier Stokes equations in the low Mach number limit. In the absence of heat exchange (the isentropic regime) this limit is well understood and rigorous results are available. When heat exchange is considered different simplified models can be obtained, the most famous being the Boussinesq approximation. Here a unified formal justification of these models is presented, paying special attention to the relation between the low Mach number and the Boussinesq approximations. Precise conditions for their validity are given for classical problems in bounded domains.
Abstract
In this paper we review and clarify some aspects of the asymptotic analysis of the compressible Navier Stokes equations in the low Mach number limit. In the absence of heat [...]
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Unified Stabilized Finite Element Formulations for the Stokes and the Darcy Problems
S. Badia, R. Codina

SIAM J. Numer. Anal. (2009). Vol. 47 (3), pp. 1971-2000

Abstract
In this paper we propose stabilized finite element methods for both Stokes' and Darcy's problems that accommodate any interpolation of velocities and pressures. Apart from the interest of this fact, the important issue is that we are able to deal with both problems at the same time, in a completely unified manner, in spite of the fact that the functional setting is different. Concerning the stabilization formulation, we discuss the effect of the choice of the length scale appearing in the expression of the stabilization parameters, both in what refers to stability and to accuracy. This choice is shown to be crucial in the case of Darcy's problem. As an additional feature of this work, we treat two types of stabilized formulations, showing that they have a very similar behavior
Abstract
In this paper we propose stabilized finite element methods for both Stokes' and Darcy's problems that accommodate any interpolation of velocities and pressures. Apart [...]
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A numerical approximation of the thermal coupling of fluids and solids
J. Principe, R. Codina

Int. J. Numer. Meth. Fluids (2009). Vol. 59 (11), pp. 1181-1201

Abstract
In this article we analyze the problem of the thermal coupling of fluids and solids through a common interface. We state the global thermal problem in the whole domain, including the fluid part and the solid part. This global thermal problem presents discontinuous physical properties that depend on the solution of auxiliary problems on each part of the domain (a fluid flow problem and a solid state problem). We present a domain decomposition strategy to iteratively solve problems posed in both subdomains and discuss some implementation aspects of the algorithm. This domain decomposition framework is also used to revisit the use of wall function approaches used in this context.
Abstract
In this article we analyze the problem of the thermal coupling of fluids and solids through a common interface. We state the global thermal problem in the whole domain, including [...]
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On a multiscale approach to the transient Stokes problem: Dynamic subscales and anisotropic space–time discretization
S. Badia, R. Codina

Applied Mathematics and Computation (2009). Vol. 207 (2), pp. 415-433

Abstract
In this article, we analyze some residual-based stabilization techniques for the transient Stokes problem when considering anisotropic time–space discretizations. We define an anisotropic time–space discretization as a family of time–space partitions that does not satisfy the condition h2⩽Cδt with C uniform with respect to h and δt. Standard residual-based stabilization techniques are motivated by a multiscale approach, approximating the effect of the subscales onto the large scales. One of the approximations is to consider the subscales quasi-static (neglecting their time derivative). It is well known that these techniques are unstable for anisotropic time–space discretizations. We show that the use of dynamic subscales (where the subscales time derivatives are not neglected) solves the problem, and prove optimal convergence and stability results that are valid for anisotropic time–space discretizations. Also the improvements related to the use of orthogonal subscales are addressed.
Abstract
In this article, we analyze some residual-based stabilization techniques for the transient Stokes problem when considering anisotropic time–space discretizations. [...]
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The fixed-mesh ALE approach for the numerical approximation of flows in moving domains
R. Codina, G. Houzeaux, H. Coppola-Owen, J. Baiges

Journal of Computational Physics (2009). Vol. 228 (5), pp. 1591-1611

Abstract
In this paper we propose a method to approximate flow problems in moving domains using always a given grid for the spatial discretization, and therefore the formulation to be presented falls within the category of fixed-grid methods. Even though the imposition of boundary conditions is a key ingredient that is very often used to classify the fixed-grid method, our approach can be applied together with any technique to impose approximately boundary conditions, although we also describe the one we actually favor. Our main concern is to properly account for the advection of information as the domain boundary evolves. To achieve this, we use an arbitrary Lagrangian–Eulerian framework, the distinctive feature being that at each time step results are projected onto a fixed, background mesh, that is where the problem is actually solved.
Abstract
In this paper we propose a method to approximate flow problems in moving domains using always a given grid for the spatial discretization, and therefore the formulation [...]
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Finite element approximation of the three field formulation of the Stokes problem using arbitrary interpolations
R. Codina

SIAM J. Numer. Anal. (2009). Vol. 47 (1), pp. 699-718

Abstract
The stress-displacement-pressure formulation of the elasticity problem may suffer from two types of numerical instabilities related to the finite element interpolation of the unknowns. The first is the classical pressure instability that occurs when the solid is incompressible, whereas the second is the lack of stability in the stresses. To overcome these instabilities, there are two options. The first is to use different interpolation for all the unknowns satisfying two inf-sup conditions. Whereas there are several displacement-pressure interpolations that render the pressure stable, less possibilities are known for the stress interpolation. The second option is to use a stabilized finite element formulation instead of the plain Galerkin approach. If this formulation is properly designed, it is possible to use arbitrary interpolation for all the unknowns. The purpose of this paper is precisely to present one of such formulations. In particular, it is based on the decomposition of the unknowns into their finite element component and a subscale, which will be approximated and whose goal is to yield a stable formulation. A singular feature of the method to be presented is that the subscales will be considered orthogonal to the finite element space. We describe the design of the formulation and present the results of its numerical analysis.
Abstract
The stress-displacement-pressure formulation of the elasticity problem may suffer from two types of numerical instabilities related to the finite element interpolation of [...]
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Subscales on the element boundaries in the variational two-scale finite element method
R. Codina, J. Principe, J. Baiges

Comput. Methods Appl. Mech. Engrg., (2009). Vol. 198 (5-8), pp. 838-852

Abstract
In this paper, we introduce a way to approximate the subscales on the boundaries of the elements in a variational two-scale finite element approximation to flow problems. The key idea is that the subscales on the element boundaries must be such that the transmission conditions for the unknown, split as its finite element contribution and the subscale, hold. In particular, we consider the scalar convection–diffusion–reaction equation, the Stokes problem and Darcy’s problem. For these problems the transmission conditions are the continuity of the unknown and its fluxes through element boundaries. The former is automatically achieved by introducing a single valued subscale on the boundaries (for the conforming approximations we consider), whereas the latter provides the effective condition for approximating these values. The final result is that the subscale on the interelement boundaries must be proportional to the jump of the flux of the finite element component and the average of the subscale calculated in the element interiors.
Abstract
In this paper, we introduce a way to approximate the subscales on the boundaries of the elements in a variational two-scale finite element approximation to flow problems. [...]
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La ciencia a l'enginyeria. El llegat de l'école polytechnique
X. Oliver

(2009). Research Report, Nº PI338
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Size effect and localization in J2 plasticity
M. Cervera, M. Chiumenti

(2009). Research Report, Nº PI331

Abstract
This paper studies the phenomenon of structural size effect and strain localization in J2 plasticity. Size effect is here understood as the change in the response of a given structure when the spatial dimensions are scaled up or down while the geometry and other relevant properties of the structure are preserved. The work exploits the advantages of the mixed displacement–pressure formulation in incompressible or quasi-incompressible situations. Elasto-J2-plastic constitutive behaviour with regularized softening is considered. Stability issues are discussed to ensure existence and uniqueness of the solution of the corresponding discrete finite element formulation. Numerical examples show that the formulation derived is able to solve a wide range of structural scales, including real life engineering applications. The results obtained do not suffer from spurious mesh dependence. Furthermore, the formulation includes the classical theories of perfect plasticity and linear fracture mechanics as limit cases.
Abstract
This paper studies the phenomenon of structural size effect and strain localization in J2 plasticity. Size effect is here understood as the change in the response of a given [...]
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Fuel cells state of the art
A. Jarauta, J. Pons Prats

(2009). Research Report, Nº PI340
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Las ingenierias: Unas profesiones de largo recorrido
B. Suarez

(2009). Research Report, Nº PI339
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A finite point method to solve shallow water equations.
C. Buachart, E. Ortega, E. Oñate

(2009). Research Report, Nº PI337
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Optimizing rock cutting through computer simulation
J. Rojek, E. Oñate, C. Labra, H. Kazal, J. Akerman

(2009). Research Report, Nº PI336

Abstract
This paper presents an original thermomechanical model of rock cutting with evaluation of tool wear. The model has been developed within the framework of the discrete element method, which is a suitable numerical method to study problems of multiple material fractures likes those of rock cutting. The paper presents brief overview of the theoretical formulation, calibration of the discrete element model, and a number of numerical results obtained in simulation of rock cutting processes typical for underground excavation, using both roadheaders and TBMs.
Abstract
This paper presents an original thermomechanical model of rock cutting with evaluation of tool wear. The model has been developed within the framework of the discrete element [...]
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A neural networks approach to aerofoil noise prediction
K. Lau, R. López, E. Oñate

(2009). Research Report, Nº PI335

Abstract
A neural network noise prediction model for a turbulent boundary layer noise mechanism has been created using a feed forward multilayer perceptron and a noise spectrum database collected from a family of NACA 0012 areofoils. The results of the neural network model were compared against the Brooks model and it was found that the quality of the prediction was improved was improved over the entire range of the data. The model was also validated against experimental data not utilized the training of the neural, with positive results.
Abstract
A neural network noise prediction model for a turbulent boundary layer noise mechanism has been created using a feed forward multilayer perceptron and a noise spectrum database [...]
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Melting and spread of polymer in fire with the particle finite element method
E. Oñate, R. Rossi, K. Butler, S. Idelsohn

(2009). Research Report, Nº PI333

Abstract
A new computational procedure for analysis of the melting and flame spread of polymers under fire conditions is presented. The method, termed Particle Finite Element Method (PFEM), combines concepts from particle-based techniques with those of the standard finite element method (FEM). The key feature of the PFEM is the use of an updated Lagrangian description to model the motion of nodes (particles) in the thermoplastic material. Nodes are viewed as material points which can freely move and even separate from the main analysis domain representing, for instance, the effect of melting and dripping of polymer particles. A mesh connects the nodes defining the discretized domain where the governing equations are solved as in the standard FEM. An incremental iterative scheme for the solution of the nonlinear transient coupled thermal-flow problem, including loss of mass by gasification, is used. Examples of the possibilities of the PFEM for the modelling and simulation of the melting and flame spread of polymers under different fire conditions are described. Numerical results are compared with experimental data provided by NIST.
Abstract
A new computational procedure for analysis of the melting and flame spread of polymers under fire conditions is presented. The method, termed Particle Finite Element Method [...]
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A numerical investigation of wind tunnel model deformations caused by the twin-sting support system
R. Flores, E. Ortega, E. Oñate

(2009). Research Report, Nº PI334

Abstract
This work presents a wing deformation analysis of a twin-sting-mounted commercial aircraft model. Twin-sting arrangements minimize flow disturbances around the model fuselage and tail; on the other hand, they cause important changes in the flow field around the wing and also increase aerodynamic interference at the wing and aeroelastic effects on the wing. In some cases, these effects can alter the normal downwash developed behind the wing, modifying the flow pattern at the tail. Consequently, when tail aerodynamics is a major concern, this kind of support interference should be carefully evaluated. The methodology developed in this work employs an unstructured FEM-based flow solver for computing aerodynamic loads. These loads are then transferred to a finite element structural model in order to assess the geometrical deformation of the wing caused by torsional moment exerted by supporting mechanism. The analysis described involves three different twin-sting support configurations taking into account angle of attack variations and Mach numbers spanning from subsonic of high transonic ranges.
Abstract
This work presents a wing deformation analysis of a twin-sting-mounted commercial aircraft model. Twin-sting arrangements minimize flow disturbances around the model fuselage [...]
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New computational challenges in fluid-structure interactions problems
S. Idelsohn, E. Oñate, R. Rossi, J. Marti, F. Del Pin

(2009). ECCOMAS Multidisciplinary Jubilee Symposium, J. Eberhardsteiner, Ch. Hellmich, H. Mang and J. Périaux (Eds.)

Abstract
In this paper the so-called added-mass effect is investigated from a different point of view of previous publications. The monolithic fluid structure problem is partitioned using a static condensation of the velocity terms. Following this procedure the classical stabilized projection method for incompressible fluid flows is introduced. The procedure allows obtaining a new pressure segregated scheme for fluid-structure interaction problems which has good convergent characteristics even for biomechanical application, where the added mass effect is strong. The procedure reveals its power when it is shown that the same projection technique must be implemented in staggered FSI methods.
Abstract
In this paper the so-called added-mass effect is investigated from a different point of view of previous publications. The monolithic fluid structure problem is partitioned [...]
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Wireless sensor networks for strain monitoring during steel bridges launching
R. Chacón, F. Guzmán, E. Mirabell, E. Real, E. Oñate

Structural Health Monitoring (2009). Vol. 8 (3), pp. 195-205

Abstract
n this paper, an experimental test performed on a hybrid steel plate girder was subjected to concentrated loads at the end of an unstiffened panel is presented. This load was intended to produce a typical reaction of the piers while launching steel girders in bridges. In this test, strain measurements were taken with conventional pre-wired gauges as well as with newly developed wirelessly connected strain-measuring system. Both measurements were carefully compared and the accuracy of the developed system was demonstrated. Results were also compared with numerical simulations deployed with FE models and on such a basis; the reliability of the developed wireless system was proven. Finally, suggestions of potential research trends in this area are provided
Abstract
n this paper, an experimental test performed on a hybrid steel plate girder was subjected to concentrated loads at the end of an unstiffened panel is presented. This load [...]
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A monolithic FE formulation for the analysis of membranes in fluids
R. Rossi, P. Ryzhakov, E. Oñate

International Journal of Space Structures (2009). Vol. 24 (4), pp. 205-210

Abstract
We propose here an efficient approach for treating the interaction between membranes and fluids. Slight compressibility of the fluid is assumed. Classical total Lagrangian formulation including wrinkling is adopted for the membrane representation, whereas fluid is treated in an updated Lagrangian manner, developed in the current work. Assumption of slight compressibility of the fluid enables one to define the monolithic fluid-membrane system in a natural way. The displacements are the primary variables of both the fluid and the membrane domains. The formulation adopts the Particle Finite Element Method (PFEM) philosophy for free-surface identification and mesh regeneration. Three examples illustrate the functionality of the formulation in application to FSI problems involving motion of membranes in water
Abstract
We propose here an efficient approach for treating the interaction between membranes and fluids. Slight compressibility of the fluid is assumed. Classical total Lagrangian [...]
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Nonlinear Formulations of a Four-Node Quasi-Conforming Shell Element
G. Lomboy, S. Suthasupradit, K. Kim, E. Oñate

Archives of Comp. Meths. Engng. (2009). Vol. 16 (2), pp. 189-250

Abstract
The quasi-conforming technique was introduced in the 1980’s to meet the challenge of inter-elements conforming problems and give a unified treatment of both conforming and nonconforming elements. While the linear formulation is well established, the nonlinear formulation based on the quasi-conforming technique that includes geometric and material nonlinearity is presented in this paper. The formulation is derived in the framework of an updated Lagrangian stress resultant, co-rotational approach. The geometric nonlinear formulation provides solutions to buckling and postbuckling behaviour while the material nonlinear formulation considers the spread of plasticity within the element while maintaining an explicit construction of element matrices. Aside from the elasto-plastic constitutive relation, formulations on laminate composites and reinforced concrete are also presented. The formulations of laminate composite and reinforced concrete material are present based on the layer concept, the material properties can vary throughout the thickness and across the surface of a shell element. The various failure criteria for laminate composite are included in the formulation which makes it possible to analyses the progressive failure of fibre and matrix. For the reinforced concrete material, the nonlinearities as a result of tensile cracking, tension stiffening between cracks, the nonlinear response of concrete in compression, and the yielding of the reinforcement are considered. The steel reinforcement is modeled as a bilinear material with strain hardening.
Abstract
The quasi-conforming technique was introduced in the 1980’s to meet the challenge of inter-elements conforming problems and give a unified treatment of both conforming [...]
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Advances in discrete element modelling of underground excavations
C. Labra, J. Rojek, E. Oñate, F. Zárate

Acta Geotechnica (2009). Vol. 3 (4), pp. 317-322

Abstract
The paper presents advances in the discrete element modelling of underground excavation processes extending modelling possibilities as well as increasing computational efficiency. Efficient numerical models have been obtained using techniques of parallel computing and coupling the discrete element method with finite element method. The discrete element algorithm has been applied to simulation of different excavation processes, using different tools, TBMs and roadheaders. Numerical examples of tunnelling process are included in the paper, showing results in the form of rock failure, damage in the material, cutting forces and tool wear. Efficiency of the code for solving large scale geomechanical problems is also shown
Abstract
The paper presents advances in the discrete element modelling of underground excavation processes extending modelling possibilities as well as increasing computational efficiency. [...]
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Personal information “management” (PIM), not just personal information “retrieval”
D. Barreu

El profesional de la información (2009). Vol. 18, (4), 90

Abstract
Comparison of the characteristics and behaviour of people who are sorting and archiving physical and digital objects. There is limited selection –and also little interest– in tools for classifying digital objects that subsequently allow easy interaction with them or mental reflection while reviewing them. Thanks to the availability of inexpensive computer memory, people tend to save everything without categorizing, and trust –erroneously– only in good retrieval skills. Much more research in personal information management systems (PIM) is needed.
Abstract
Comparison of the characteristics and behaviour of people who are sorting and archiving physical and digital objects. There is limited selection –and also little interest– [...]
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Wikipedia as controlled vocabulary: has the traditional authority control been surpassed?
J. Jiménez-Pelayo

El profesional de la información (2009). Vol. 18, (4), 89

Abstract
Wikipedia, the free encyclopaedia, is the first project to have been born specifically from and for the web and which has developed an authority control system for access to their information. Here, the different elements, procedures and principles which make up the Wikipedia authority control system is analysed, and a critical analogy is traced between them and those that meet the traditional authority control applied to bibliographical catalogues. From the critical comparison of both models, one wonders up to what point the authority control, constrained by the weight of tradition and by its hopeless adaptation to technology, has been surpassed by developments such as Wikipedia which are based on a philosophy of flexibility and common sense and where the rules are decided by and for the user. The enormous potential and reach of the Wikipedia authority model make it a true contender to become the normal system of access to the Semantic Web
Abstract
Wikipedia, the free encyclopaedia, is the first project to have been born specifically from and for the web and which has developed an authority control system for access [...]
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Bibliometric assessment of universities with Scival of Elsevier
D. Torres-Salinas

El profesional de la información (2009). Vol. 18, (4), 88

Abstract
Research, its management and its policies represent a major effort for Spanish universities but few of these institutions have a scientific information system with bibliometric indicators for decision making. Aware of this gap, Elsevier has launched Scival. It is a web platform intended to assess institutions through maps and indicators calculated from the Scopus database. In this article we review this new product. We first describe the scientific basis of the platform that is based on the works of Klavan and Bojack about co-citation maps of science and the identification of paradigms. Secondly we describe its interface and its utilities, paying particular attention to the so-called Wheel of science. Finally, we discuss some critical aspects of Scival
Abstract
Research, its management and its policies represent a major effort for Spanish universities but few of these institutions have a scientific information system with bibliometric [...]
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Evaluation of national libraries: creation of an international standard and its application to the National Library of Spain
M. De-la-Mano, B. Albelda-Esteban

El profesional de la información (2009). Vol. 18, (4), 87

Abstract
National libraries have recently adopted a quality assessment culture using performance indicators. The project for devising Technical Report ISO/TR 28118 regarding performance indicators for national libraries is explained from its beginnings. This is a specific common standard that permit benchmarking among similar institutions at the international level. The involvement of the international bodies IFLA, ISO and CENL in this initiative is described based on observation of the situations common to all national libraries. The technical process of drawing up the report is likewise described, along with its structure and contents. Also dealt with is the recent experience of the National Library of Spain in incorporating performance indicators to its evaluation processes and applying the ISO report indicators.
Abstract
National libraries have recently adopted a quality assessment culture using performance indicators. The project for devising Technical Report ISO/TR 28118 regarding performance [...]
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Integrating digital reference services into library management: experiences based on Koha
N. Lloret-Romero, A. Sellés-Carot, M. Mañas-Carbonell, F. Canet-Centellas

El profesional de la información (2009). Vol. 18, (4), 86

Abstract
The digital environment and information and communication technologies open up new ways of providing library services, including the reference service, the principal aim of which is to address users’ queries and information needs. Putting the reference service in place in this new environment requires redesigning the policies, procedures and resources applied to it and therefore an analysis of the services and functions of the computing tools available must be undertaken. Integrated library management systems which involve multiple functionalities for delivering services, or which expand the capacity for their delivery, must also respond to the requirements for putting this type of service in place. This article sets out the results obtained in a study carried out on several examples of integrating new reference services into a library management system (Koha), which not only enables these services to be delivered but also expands the options for using the data for their improvement and development.
Abstract
The digital environment and information and communication technologies open up new ways of providing library services, including the reference service, the principal aim [...]
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InfoSud Digital: a virtual reference service for cooperative development
F. Ginés-Huertas

El profesional de la información (2009). Vol. 18, (4), 85

Abstract
InfoSud Digital promotes social awareness of international development collaborations. A VRS (Virtual Reference Service) using the Question Point tool from OCLC was created for this purpose. The ultimate goal is to create a network of information and documentation on cooperation for development. InfoSud Digital is a project developed by InfoSud, the information centre of the Patronat Sud-Nord of the University of Valencia.
Abstract
InfoSud Digital promotes social awareness of international development collaborations. A VRS (Virtual Reference Service) using the Question Point tool from OCLC was created [...]
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Pregunte: las bibliotecas responden (Ask a librarian). Virtual reference services in Spain’s public libraries
M. Cuadrado-Fernández, E. Rivera-Díaz

El profesional de la información (2009). Vol. 18, (4), 84

Abstract
Review and development of the Spanish virtual reference service Pregunte: las bibliotecas responden (Ask a librarian). Description of main characteristics, workflows and statistical analysis. Description of the recently established chat service
Abstract
Review and development of the Spanish virtual reference service Pregunte: las bibliotecas responden (Ask a librarian). Description of main characteristics, workflows and statistical [...]
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Virtual reference in Seville University Library: a shared experience
N. González-Fernández-Villavicencio, J. Barrera-Gómez, M. Gómez-Fernández, M. Moscoso-Castillo, V. Santos-Flores, M. Suárez-Samaniego

El profesional de la información (2009). Vol. 18, (4), 83

Abstract
Reference services in academic libraries are far from dead and technologies of the social web are facilitating and encouraging an ever increasing demand for virtual reference with applications available to everyone. The open source software LibraryH3lp has enabled the Library of the University of Seville to establish a virtual reference service shared among 19 libraries to answer common and specialized questions and explain the use of the Fama library catalog. We present a first assessment of the service that will go live in the academic year 2009-2010.
Abstract
Reference services in academic libraries are far from dead and technologies of the social web are facilitating and encouraging an ever increasing demand for virtual reference [...]
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The use of robots.txt and sitemaps in the Spanish public administration
B. Martín-Galán, T. Hernández-Pérez, D. Rodríguez-Mateos, D. Peña-Gil

El profesional de la información (2009). Vol. 18, (4), 82

Abstract
Robots.txt and sitemaps files are the main methods to regulate search engine crawler access to its content. This article explain the importance of such files and analyze robots.txt and sitemaps from more than 4,000 web sites belonging to spanish public administration to determine the use of these files as a medium of optimization for crawlers.
Abstract
Robots.txt and sitemaps files are the main methods to regulate search engine crawler access to its content. This article explain the importance of such files and analyze robots.txt [...]
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Research and development in digital preservation: an international review
M. Térmens

El profesional de la información (2009). Vol. 18, (4), 81

Abstract
The article presents a survey of international research studies and development in digital preservation, devoting a section to the situation in Spain. The author outlines applications in areas such as institutional repositories, administrative records, personal archives, aerospace industry and museum archives, but the greatest attention is given to digital preservation applications in libraries and archives. The pre-eminent role of certain libraries and the national archives and records of certain countries is evident in an analysis of the protagonists of this research, as well as the emerging role of software companies. The major lines of research include the integration of tools to create integrated preservation systems.
Abstract
The article presents a survey of international research studies and development in digital preservation, devoting a section to the situation in Spain. The author outlines [...]
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Personal information management using concept mapping software
J. Tramullas, A. Sánchez-Casabón, P. Garrido-Picazo

El profesional de la información (2009). Vol. 18, (4), 80

Abstract
Personal information management (PIM) raises some problems because the software tools that are used don’t adequately respond to user behaviour and activities. The concept and personal information management problems are reviewed, along with the software tools used for this task. A qualitative assessment explores whether an approach based on software tools for conceptual maps can address the problems discussed.
Abstract
Personal information management (PIM) raises some problems because the software tools that are used don’t adequately respond to user behaviour and activities. The concept [...]
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Digital reference: concept, technologies, and implementation in information centres
J. Merlo-Vega

El profesional de la información (2009). Vol. 18, (4), 79

Abstract
Digital reference is the service offered by libraries and information centres so that users can ask questions through the Internet. The concept of digital reference is described, along with the different typologies based on various criteria. The technologies used today for receiving questions and sending answers are presented. Guidelines are suggested for implementing a digital reference service, based on four criteria: the actors involved, the techniques used, the available resources and the management of the service. It concludes by highlighting the value of digital reference as an online service that expands the range of patrons.
Abstract
Digital reference is the service offered by libraries and information centres so that users can ask questions through the Internet. The concept of digital reference is described, [...]
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Reference services for a digital society
J. Merlo-Vega

El profesional de la información (2009). Vol. 18, (4), 78

Abstract
Reference services have developed at the same pace as technology. Different aspects of the information society related to reference services provided by libraries and information centres are presented, including a description of the ubiquity, immediacy and participation that define the digital society. Digital reference is part of the information society and reflects the evolution of reference services offered by information centres. The characteristics of digital reference are described: telematic services, hybrid collections and skilled professionals.
Abstract
Reference services have developed at the same pace as technology. Different aspects of the information society related to reference services provided by libraries and information [...]
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Prácticas de las bibliotecas universitarias argentinas (Mercedes Patalano)
L. Ramos-Simón

El profesional de la información (2009). Vol. 18, (4), 77

Abstract
Patalano, Mercedes (2008). Prácticas de las bibliotecas universitarias argentinas. Reflexiones críticas en el contexto de la comunicación académica y sus representaciones en la Web. Editorial Teseo, Buenos Aires, 160 pp. ISBN: 978 9871354191
Abstract
Patalano, Mercedes (2008). Prácticas de las bibliotecas universitarias argentinas. Reflexiones críticas en el contexto de la comunicación académica y sus representaciones [...]
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Manual de indización: teoría y práctica (Isidoro Gil-Leiva)
A. Alonso-Arroyo

El profesional de la información (2009). Vol. 18, (4), 76

Abstract
Gil-Leiva, Isidoro (2008). Manual de indización: teoría y práctica. Gijón: Trea, 432 p. (Biblioteca y administración cultural; 193). ISBN: 978 84 9704 367 0
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OSTI-DOE, the source of energy information. Interview with Karen Spence
F. Peset, T. Baiget

El profesional de la información (2009). Vol. 18, (4), 75

Abstract
An interview with Karen Spence, assistant director of Information Systems, Office of Scientific and Technical Information (OSTI), United States Department of Energy, describes the major OSTI databases, repositories and scientific and technical information co-operation projects (especially on energy and environment).
Abstract
An interview with Karen Spence, assistant director of Information Systems, Office of Scientific and Technical Information (OSTI), United States Department of Energy, describes [...]
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Aggregation of bibliometric indices to evaluate the scientific production of researchers
F. Herrera, E. Herrera-Viedma, S. Alonso, F. Cabrerizo

El profesional de la información (2009). Vol. 18, (4), 74

Abstract
In this paper we show that the aggregation of bibliometric indices is an appropriate way to evaluate scientific production of researchers because it allows us to develop much more precise new bibliometric indices that combine the advantages of each index that is aggregated.
Abstract
In this paper we show that the aggregation of bibliometric indices is an appropriate way to evaluate scientific production of researchers because it allows us to develop much [...]
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Evolution of social network services
M. Ros-Martín

El profesional de la información (2009). Vol. 18, (4), 73

Abstract
The paper exposes a brief history of social network services on the Web that have evolved under the concept of Web 2.0, along with the most significant examples of these platforms. The concept of social networking and the main tests used to study them are explained, as well as their implications within different kinds of social capital (weak and strong ties) and the impact that the different web services can have on the relationship among their users.
Abstract
The paper exposes a brief history of social network services on the Web that have evolved under the concept of Web 2.0, along with the most significant examples of these platforms. [...]
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The VideoActive project: Television as public service and audiovisual patrimony
D. Fernández-Quijada, M. Fortino

El profesional de la información (2009). Vol. 18, (4), 72

Abstract
The need to preserve audiovisual archives and the possibilities for their dissemination resulting from digitisation have generated a growing interest in the development of platforms to provide access to their content. One of these platforms is VideoActive, a pan-European collaborative project that has developed a thematic approach to European history through TV and to the history of European TV. One of its key objectives is to encourage collaboration with the academic world. The consortium has developed its own technical infrastructure to offer at least 10,000 items from 10 different European archives, including that of Televisió de Catalunya, the Catalan public service broadcaster that seeks to contribute to international awareness of Catalan culture.
Abstract
The need to preserve audiovisual archives and the possibilities for their dissemination resulting from digitisation have generated a growing interest in the development of [...]
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Meridià: a web portal to disseminate science from a comprehensive and cooperative view
L. Arguimbau, A. Cervera, R. Latorre, M. Martí

El profesional de la información (2009). Vol. 18, (4), 71

Abstract
The proper functioning of the Research, Development and Innovation (R&D&I) cycle requires an efficient processing of scientific information. The Institute for Catalan Studies (IEC) possesses a scientific observatory which recently presented the web portal Meridià. From a global point of view, this project aims to be a cooperative initiative to integrate and share information with other agents of the scientific system, providing a thorough understanding of their environment and the evolution of the different areas in science and technology.
Abstract
The proper functioning of the Research, Development and Innovation (R&D&I) cycle requires an efficient processing of scientific information. The Institute for Catalan Studies [...]
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Strategies to improve the dissemination of research results with the Web 2.0
D. Torres-Salinas, E. Delgado-López-Cózar

El profesional de la información (2009). Vol. 18, (4), 70

Abstract
Scientific communication is being enriched by the introduction of new ways of storage, publication and dissemination of the results. These include the services of the Web 2.0 which are still largely unknown to researchers. In this context the objective of this paper is to illustrate how we can strategically use Web Services 2.0 to disseminate and give greater visibility to scientific publications. To this end we present a series of services of interest to scientific communication (Blogger, Twitter, Facebook, Slideshare y E-Lis) and explain the role they can play in communicating scientific results. It also shows how these services should be logically interrelated, which we call the strategic dissemination cycle. In the last section, the authors collected a set of webmetric indicators classified into three groups (social influence, use, recognition) to evaluate the success of the dissemination strategy and the visibility of a work in the Web 2.0.
Abstract
Scientific communication is being enriched by the introduction of new ways of storage, publication and dissemination of the results. These include the services of the Web [...]
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Retrieval of very large numbers of items in the Web of Science: an exercise to develop accurate search strategies
R. Arencibia-Jorge, L. Leydesdorff, Z. Chinchilla-Rodríguez, R. Rousseau, S. Paris

El profesional de la información (2009). Vol. 18, (4), 69

Abstract
The Web of Science interface counts at most 100,000 retrieved items from a single query. If the query results in a dataset containing more than 100,000 items the number of retrieved items is indicated as >100,000. The problem studied here is how to find the exact number of items in a query that leads to more than 100,000 items. One way to achieve this objective is presented. The retrieval of the entire scientific production from the United States in a specific year (2007) is counted and an advanced search strategy is designed. Different sections of items can be retrieved using the Source field of the database. A Boolean statement was created with the aim of eliminating overlapped sections and improving the accuracy of this search strategy.
Abstract
The Web of Science interface counts at most 100,000 retrieved items from a single query. If the query results in a dataset containing more than 100,000 items the number of [...]
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ISOC database as information system: a major source for the analysis of Human and Social Sciences in Spain
T. Abejón-Peña, Á. Maldonado-Martínez, L. Rodríguez-Yunta, M. Rubio-Liniers

El profesional de la información (2009). Vol. 18, (4), 68

Abstract
The ISOC database is presented as an information system that is very useful for the dissemination and the study of scientific production in human and social sciences in Spain since 1975. First of all, an historical overview is proposed. Secondly, quality elements that distinguish ISOC from other documentary systems are described. Thirdly, its suitability for bibliometric studies on the scientific production of these subjects published in Spain is discussed. Finally, some data about its use by the scientific and scholarly community are presented.
Abstract
The ISOC database is presented as an information system that is very useful for the dissemination and the study of scientific production in human and social sciences in Spain [...]
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Use of patent databases as a tool for technology watch
A. Hidalgo-Nuchera, S. Iglesias-Pradas, Á. Hernández-García

El profesional de la información (2009). Vol. 18, (4), 67

Abstract
Given the importance of innovation and technology development in a country’s economy, there has been an increasing need for selecting indicators to measure the degree of innovation of its companies. The indicators related to patents offer an excellent measure of this capability and can be used as an important source of information by innovative organizations, although the studies assessing this utility are scarce. This study, conducted throughout 2007, proposes a technology watch oriented analysis of the level of use of patent databases from more than 500 Spanish companies that have issued at least one patent in the period 1988-1998, followed by discussion of the study results. The analysis took into account global data, company size and sector of activity
Abstract
Given the importance of innovation and technology development in a country’s economy, there has been an increasing need for selecting indicators to measure the degree of [...]
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Google Scholar as a tool for research assessment
D. Torres-Salinas, R. Ruiz-Pérez, E. Delgado-López-Cózar

El profesional de la información (2009). Vol. 18, (4), 66

Abstract
Google Scholar is a search engine that specializes in scientific information and in the identification of the citations that academic papers receive, making it a strong competitor for other citations indexes. For this reason, several studies have attempted to evaluate its capacity as a bibliometric tool. Due to this interest, we present an introduction to its use and the advantages and disadvantages versus Scopus and Web of Science. First, its way of collecting information and features of its interface are analyzed. The following section describes the results that Google Scholar generates. Thirdly, we analyze the coverage of information sources and the different document types to be found, showing how this coverage universe offers different citations versus other products. Finally, we specify the standardization problems of Google Scholar and offer a number of precautions that must be taken into account when using Google Scholar as an evaluation tool.
Abstract
Google Scholar is a search engine that specializes in scientific information and in the identification of the citations that academic papers receive, making it a strong competitor [...]
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Spanish public universities in Google Scholar: presence, evolution and coverage of their scientific output
E. Orduña-Malea, J. Serrano-Cobos, N. Lloret-Romero

El profesional de la información (2009). Vol. 18, (4), 65

Abstract
The validity of Google Scholar as a service that reflects properly the scientific output of a university is analyzed, comparing its coverage of Spanish public universities with that of Scopus. The presence and evolution of scientific documentation on the websites of the Spanish public universities from January to July (both months inclusive) 2009 is also studied. The results show that, despite finding some interrelationship between Scholar and Scopus concerning the productivity of institutions, there are large differences in the total results that override the latter as a valid reflection of university productivity. Finally, Scholar shows positive, albeit modest, growth during the studied period for most university websites analyzed
Abstract
The validity of Google Scholar as a service that reflects properly the scientific output of a university is analyzed, comparing its coverage of Spanish public universities [...]
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Science and us
L. Martínez

El profesional de la información (2009). Vol. 18, (4), 64

Abstract
Science is the most refined cultural element to describe and manage the environment. It is the result of a permanent evolutionary algorithm and represents an adaptive biological advantage for the human species. Science evolves socially through physical records and information media, whose changes influence both science and society. Information professionals have been managing these physical records or knowledge containers. The technodigital revolution grows an industrialized information society where science is a productive workforce, with a neurodigital nature, and develops as a collective enterprise. Science containers are now very changeable, plural, segmented, networking, and take on a business look: they become “specific information platforms”. Information professionals’ position is rather weak, but they have the possibility to turn into information engineers, to participate in some of those platforms and to compete individually as information managers in the science arena.
Abstract
Science is the most refined cultural element to describe and manage the environment. It is the result of a permanent evolutionary algorithm and represents an adaptive biological [...]
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Bases de datos de libre acceso difundidas por la Administración General del Estado (L. Fernando Ramos-Simón)
A. Muñoz-Cañavate

El profesional de la información (2009). Vol. 18, (4), 63

Abstract
Ramos-Simón, Luis-Fernando (2008). Bases de datos de libre acceso difundidas por la Administración General del Estado. Grupo Publidoc-UCM, coord. Madrid: Ministerio de Cultura, Editorial Complutense, 349 pp. ISBN: 978 84 7491 940 0
Abstract
Ramos-Simón, Luis-Fernando (2008). Bases de datos de libre acceso difundidas por la Administración General del Estado. Grupo Publidoc-UCM, coord. Madrid: Ministerio de Cultura, [...]
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Social networks: beyond privacy
M. Sola-Martínez

El profesional de la información (2009). Vol. 18, (4), 62

Abstract
Last February, following a change in Facebook’s use policies, a discussion about social networks began in IweTel, expanding on multiple facets of previous messages to the list. Topics included: the policies of use and their acceptance by each individual; the privacy of information and its management; the differences between cloud computing and social networks; and the need to train users in the correct use of social networks as part of an information professional’s profile.
Abstract
Last February, following a change in Facebook’s use policies, a discussion about social networks began in IweTel, expanding on multiple facets of previous messages to the [...]
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Swets annual user meeting in Barcelona
N. Sauri

El profesional de la información (2009). Vol. 18, (4), 61

Abstract
Summary of developments presented at the traditional annual congress of Swets users held on June 4, 2009 in Barcelona: the tool SwetsWise Selection Support, PressDisplay news portal, the ALPSP Learned Journals Collection, and the e-book platform MyiLibrary. e-Books sales are soaring.
Abstract
Summary of developments presented at the traditional annual congress of Swets users held on June 4, 2009 in Barcelona: the tool SwetsWise Selection Support, PressDisplay news [...]
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Premis Workshop in Rome
O. Giralt, A. D'Alòs-Moner

El profesional de la información (2009). Vol. 18, (4), 60

Abstract
A Premis Workshop (PREservation Metadata: Implementation Strategies) was held in Rome on 5-6 February 2009. The event, organized by the Foundation Rinascimento Digitale, was attended by two members of the Premis Editorial Committee: Rebecca Guenther (Library of Congress) and Angela Dappert (British Library). Some preservation metadata implementation projects were presented.
Abstract
A Premis Workshop (PREservation Metadata: Implementation Strategies) was held in Rome on 5-6 February 2009. The event, organized by the Foundation Rinascimento Digitale, was [...]
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Fesabid 2009: the interinformation conference
N. Arroyo-Vázquez

El profesional de la información (2009). Vol. 18, (4), 59

Abstract
The 11th Spanish Documentation Conference (Jornadas Españolas de Documentación) was held May 20-22, 2009 in Saragossa, Spain, organized by the Spanish Federation of Societies of Archivology, Librarianship, Special librarianship and Museology (Fesabid). Socioprofessional networks served as a thread this year and provided cohesion to a large number of presentations by professionals from different areas of libraries, documentation and archives. We discuss some of them.
Abstract
The 11th Spanish Documentation Conference (Jornadas Españolas de Documentación) was held May 20-22, 2009 in Saragossa, Spain, organized by the Spanish Federation of Societies [...]
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Generation reference management software: comparative analysis of RefWorks, EndNote web and Zotero
J. Cordón-García, H. Martín-Rodero, J. Alonso-Arévalo

El profesional de la información (2009). Vol. 18, (4), 58

Abstract
Reference managing tools are one of the most useful devices for researchers and librarians due to their ability to compile, storeand format information related to different products, sources and types of records. In recent years a new generation of reference-managing software has appeared. These new tools include applications from the new technological context that have contributed to reinforcing their capacity and potential. An overview of these tools and their applications is offered. We also makes a comparative analysis of the different products with a view to highlighting their strengths as well as the elements that could be improved in each tool.
Abstract
Reference managing tools are one of the most useful devices for researchers and librarians due to their ability to compile, storeand format information related to different [...]
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The Spanish science as seen through the Web of Science (1996-2007): the disciplines
E. Delgado-López-Cózar, E. Jiménez-Contreras, R. Ruiz-Pérez

El profesional de la información (2009). Vol. 18, (4), 57

Abstract
From the information provided for free by Thomson Reuters in ScienceWatch.com, production and citation dataof the scientific disciplines are analyzed for Spain, determining the relative weight of each one both nationally and internationally throughout the past 10 years.
Abstract
From the information provided for free by Thomson Reuters in ScienceWatch.com, production and citation dataof the scientific disciplines are analyzed for Spain, determining [...]
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Citation patterns of the journal El profesional de la información (EPI)
-. Grupo Scimago

El profesional de la información (2009). Vol. 18, (4), 56

Abstract
Analysis of the citations received by the journal El profesional de la información (EPI) according to the databases ISI Science Citation Index (WoS) from Thomson Reuters, and Scopus from Elsevier, which index the journal since 2006. There are three main groups (or themes) recognized, that potentially can generate citations: bibliometrics, medicine, and library and information science in Spanish.
Abstract
Analysis of the citations received by the journal El profesional de la información (EPI) according to the databases ISI Science Citation Index (WoS) from Thomson Reuters, [...]
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Biometric facial identification
J. Caldera-Serrano, F. Zapico-Alonso

El profesional de la información (2009). Vol. 18, (4), 55

Abstract
The identification of individuals on television using facial recognition biometrics can help the work of audiovisual documentation departments. Basic biometrics concepts are presented, as well as some of the biometrics software available. Opportunities and potential uses for onomastic information management with the aim to partially automate people’s identification in television archives are discussed.
Abstract
The identification of individuals on television using facial recognition biometrics can help the work of audiovisual documentation departments. Basic biometrics concepts are [...]
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Local search replaces the classic telephone directory
T. Lowette

El profesional de la información (2009). Vol. 18, (4), 54

Abstract
The publishers of yellow pages and business directories are suffering strong competition from the internet and are forced to seek new ways of income, taking refuge in local markets and more personalized services to their users.
Abstract
The publishers of yellow pages and business directories are suffering strong competition from the internet and are forced to seek new ways of income, taking refuge in local [...]
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The information professional in crisis
E. Currás

El profesional de la información (2009). Vol. 18, (4), 53

Abstract
The profession of information scientist is considered with a historical perspective and the author tries tofigure out the reason for his identity crisis. It is suggested that uniting with librarians and archivists has proved harmful in the long run, perhaps even a drag on their development and their more dynamic image. The author doesn’t expect the situation will change in the short term.
Abstract
The profession of information scientist is considered with a historical perspective and the author tries tofigure out the reason for his identity crisis. It is suggested that [...]
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Online communication in the health field. Value of the infography
T. González-Pacanowski, P. Medina-Aguerrebere

El profesional de la información (2009). Vol. 18, (4), 52

Abstract
The great interest that health generates in people has led to several Spanish institutions of the health sector to improve the communication value of newsletters, online patients forums, brochures, online videos, mobile phone and infography, among others. The aim to educate the patients and differing themselves strategically from other institutions finds in the technology a strategic partner that affords many benefits to the target audience (immediacy, interactivity) and to the organization (brand image, time optimization). One of the most representative initiatives of this trend is the creation of infographies about health matters that, respecting the scientific, informative, didactic and ethical rigour, are spread throughout different media.
Abstract
The great interest that health generates in people has led to several Spanish institutions of the health sector to improve the communication value of newsletters, online patients [...]
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Information on internationalization in Castilla-Leon companies
M. Santos-Álvarez, M. García-Merino

El profesional de la información (2009). Vol. 18, (4), 51

Abstract
Management decision to initiate or develop internationalization depends on the ability to take advantage of opportunities afforded by foreign markets. Factors determining whether these opportunities may be profited from are: access to information and the cognitive approach of the decision-making agent, namely the manager. In our research we explore which sources of information provide the stimuli impacting the decision to internationalize and assess the influence of management’s cognitive approach. To achieve this we conducted a survey amongst Spanish firms in the region of Castilla and León in two specific areas: “information technologies” and “natural stone”. Informative stimuli are split into three concepts (appealing factors, barriers and support) and we draw on several sources of information (Icex, Excal, Chambers of Commerce and trade associations). We address two cognitive areas: proactivity and level of knowledge. Findings highlight the relative importance of the different sources of information explored in the analysis. Our research also evidences how the information received by managers merges with their own cognitive approaches forming the basis to assess the factors impacting the decision to internationalize.
Abstract
Management decision to initiate or develop internationalization depends on the ability to take advantage of opportunities afforded by foreign markets. Factors determining [...]
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Personal information management: elements, activities and integration
J. Franganillo

El profesional de la información (2009). Vol. 18, (4), 50

Abstract
Personal information management (PIM) studies how people should organize and use the information they get to solve everyday needs, in order to take full advantage of personal resources (time, money, energy, attention) and thereby increase productivity and improve their quality of life. This paper presents the components and activities where PIM is articulated and describes how to promote the integration of personal information that is generally scattered in different forms, applications and devices.
Abstract
Personal information management (PIM) studies how people should organize and use the information they get to solve everyday needs, in order to take full advantage of personal [...]
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Risk communication and web-based information systems: five models
C. Pont-Sorribes, L. Codina, R. Pedraza-Jiménez

El profesional de la información (2009). Vol. 18, (4), 49

Abstract
Public administration in the developed countries is designing information initiatives to manage risk information using web-based systems. These sites are intended to deliver information to citizens, but also have valuable information for experts and authorities. Five web sites are compared and a simple methodology is provided to extract conclusions and propose recommendations in an information management dimension that is key to saving not only property but human lives as well.
Abstract
Public administration in the developed countries is designing information initiatives to manage risk information using web-based systems. These sites are intended to deliver [...]
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The role of the digital information sources in the art market prices
E. De-la-Poza-Plaza, N. Guadalajara-Olmeda, I. Moya-Clemente

El profesional de la información (2009). Vol. 18, (4), 48

Abstract
The objective of this study is to measure the relationship between the digital information sources (Google, Yahoo and Encyclopaedia Britannica) and the turnover of the international art auction houses. The effect of the art turnover (estimated during the period 1997-2006) on the information sources (estimated on January 2007) was analyzed. The results showed a major influence of turnovers on the Net (mainly Google than Yahoo) than on the Encyclopaedia sources. Also, the information sources on the Net only affect the future art auction house’s turnovers (Google is more useful than Yahoo)
Abstract
The objective of this study is to measure the relationship between the digital information sources (Google, Yahoo and Encyclopaedia Britannica) and the turnover of the international [...]
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Knowledge life cycles: renewal and obsolescence
D. Kohl

El profesional de la información (2009). Vol. 18, (4), 47

Abstract
The traditional need to collect, care for and make available a huge collection of physical items has shaped the education, work and even the sense of identity of information professionals, as well as the services provided by libraries. As the infrastructure related to physical items increasingly disappears from our responsibilities, we need to fundamentally rethink how we go about our mission to collect, organize, preserve and make available the information resources of the human enterprise. Various topics that are transforming the information professional’s environment are discussed, including digitization, digital collections, open access, information abundance, etc.
Abstract
The traditional need to collect, care for and make available a huge collection of physical items has shaped the education, work and even the sense of identity of information [...]
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Personal information management of ICT’s intensive users
N. Ferran-Ferrer, M. Pérez-Montoro

El profesional de la información (2009). Vol. 18, (4), 46

Abstract
A large part of the research on personal information management is scattered through many journals due to the intrinsic characteristics of this topic. This work tries to compile a more complete, global and integrated study of that type of management strategies. Our study offers an analytical model of the informational behaviour of a group of individuals (students of an e-learning university, UOC) who have a positive perception of the information and communication technologies and use them intensively in their academic, professional and everyday contexts. From this qualitative research (24 interviews and content analysis), four user profiles (reactive, passive, comprehensive and proactive) have been identified in relation to personal information management and its relevant variables: access, management and use of information, cognitive style, attitude, information-related competencies, ICT perception, and academic, professional and everyday contexts. These profiles show the differences in information behaviour for each context (daily life, professional and academic). Identification of the user profiles was the essential first step in a user centered service design that addresses the specific intervention/contribution appropriate to each user type, taking into account tool and process requirements needed for them to develop efficient information behaviours
Abstract
A large part of the research on personal information management is scattered through many journals due to the intrinsic characteristics of this topic. This work tries to compile [...]
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Los nuevos diarios digitales. Entrevista a Mario Tascón
J. Guallar

El profesional de la información (2009). Vol. 18, (4), 45

Abstract
Realizamos esta entrevista en los días previos a la aparición de La información.com el 23 de abril de 2009. En el contexto actual de crisis de los medios de comunicación en el que estamos asistiendo a importantes recortes de plantilla e incluso a cierres de cabeceras, es más novedosa si cabe la feliz noticia del nacimiento de un nuevo diario digital. El contexto parece aparentemente no ser el más propicio.
Abstract
Realizamos esta entrevista en los días previos a la aparición de La información.com el 23 de abril de 2009. En el contexto actual de crisis de los medios de comunicación [...]
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The television programme researcher: the professional outlook
S. Ripoll-Mont, L. Tolosa-Robedo

El profesional de la información (2009). Vol. 18, (4), 44

Abstract
Professional trends for television programme researchers and opportunities that arise in the labour market due to the widespread media consumption and the increasing number of diverse media (mass media, internet, cultural industries, Digital Terrestrial Television...) are analysed. We present the promotion, projection and creation of virtual enterprises of audiovisual researchers in the international arena using four case studies. These research experts, most of them freelancers, have extensive experience in locating images, negotiating licenses and liquidating rights to third parties as part of the task of documenting multimedia productions. The expanding broadcast horizons, the conquest of heterogeneous customers and the use of digital archives predict new development paths and a bright future for this profession in the digital age.
Abstract
Professional trends for television programme researchers and opportunities that arise in the labour market due to the widespread media consumption and the increasing number [...]
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From the video library to the robot by way of Tarsys. New multimedia management systems in Radiotelevisión Valenciana
L. Alfonso-Noguerón

El profesional de la información (2009). Vol. 18, (4), 43

Abstract
One of the aims proposed in the Radiotelevision Valenciana (RTVV) Digitalization of Audio-visual Documentation project was to migrate the information that we had been describing, cataloguing, and indexing in BRS’s different databases throughout the years. We were relying on the work of unification and normalization undertaken in 2004, when we moved from BRS/search version 7.0 to the environment BKM v.3.1. From our experience, we know that the quality of a TV archive improves to the extent that it covers both the current and restrospective information. Therefore, a specific workflow was created to automatically digitize the images contained in the Betacam tapes from the xml file generated in the new Tarsys system
Abstract
One of the aims proposed in the Radiotelevision Valenciana (RTVV) Digitalization of Audio-visual Documentation project was to migrate the information that we had been describing, [...]
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Information centre of the Public Television Service of the Principality of Asturias
B. Estrada-Nora-González, C. Patallo-Fernández, M. Pastor-Blanco

El profesional de la información (2009). Vol. 18, (4), 42

Abstract
The creation of autonomous public Television in the Principality of Asturias inside of digital environment, involved the use of the latest technologies in production of audiovisual content, the MAM (Media Asset Management), specifically the implementation of Dalet Plus. This article shows the documentation procedures and information flow management systems of these audio-visual contents, from images entering the system until they go to the archive. It describes the Documentation experience in the launch of a project that integrates all the processes of generating of multimedia content in mass media.
Abstract
The creation of autonomous public Television in the Principality of Asturias inside of digital environment, involved the use of the latest technologies in production of audiovisual [...]
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Notes on documentation for El país newspaper
J. Blanco-García

El profesional de la información (2009). Vol. 18, (4), 41

Abstract
Newsroom convergence at El País and its online edition means a challenge for the department of Documentation, whose history is one of evolution from analogical to digital formats. This review describes the evolution that has taken place in the photograph indexing and classification processes. Content control and visibility are the main goals of a department whose aim is knowledge management within the organization.
Abstract
Newsroom convergence at El País and its online edition means a challenge for the department of Documentation, whose history is one of evolution from analogical to digital [...]
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A regional newspaper archive: the evolution of Levante-EMV
M. Ros-Martín, A. Rodero-Susiac

El profesional de la información (2009). Vol. 18, (4), 40

Abstract
Summary of the historical evolution of document management processes in the Spanish regional newspaper Levante-EMV from its privatization in 1984 to the present. First, it points out the historical stages that have been traditionally identified in print media archives, overlaid with the evolution of Levante-EMV. It then details the methods of document management that have been used in the newspaper archive, from manual document management to the integration of the archive in digital production process.
Abstract
Summary of the historical evolution of document management processes in the Spanish regional newspaper Levante-EMV from its privatization in 1984 to the present. First, it [...]
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Automation of databases: the potential of basic tools for a new kind of journalism
X. López-García, C. Toural-Bran, X. Pereira-Fariña, S. Barbosa

El profesional de la información (2009). Vol. 18, (4), 39

Abstract
The explosion of information and communication technologies (ICTs) has affected the work routines of professional journalists. Immediacy, one of the essential characteristics that the ICTs contribute to the practise of journalism, has turned the work of journalists into a race, with the databases contributing to the daily work. At present, journalists handle a great number of references relative to databases and rely on the possibility of access to an enormous quantity of information across the internet. In addition, databases have become a means of structuring the knowledge, content and in many cases even the infrastructure of media communication.
Abstract
The explosion of information and communication technologies (ICTs) has affected the work routines of professional journalists. Immediacy, one of the essential characteristics [...]
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Newspapers for mobile devices? E-book, E-ink and convergence of online and printed press
J. Díaz-Noci

El profesional de la información (2009). Vol. 18, (4), 38

Abstract
The pathway to the complete digitisation and substitution of printed press is now a reality. The imminent commercialisation of new mobile devices using e-ink, licensed by Philips, and especially the new model of Sony’s Portable Reader System in Spain (announced for Spring 2009), a determined commercial strategy, and incipient research by some Spanish newspapers make us wonder whether we are facing the end of the printed press. At the moment, the new devices are much better than their predecessors, but enough problems remain to make us doubt that we are at the beginning of the end of newsprint. The strengths of some other devices that differ from the e-book but could eventually be able to present books or newspaper on their screens, such as iPhone-like cell phones or Amazon’s Kindle (not yet available in Spain) opens an interesting era of competition and convergence
Abstract
The pathway to the complete digitisation and substitution of printed press is now a reality. The imminent commercialisation of new mobile devices using e-ink, licensed by [...]
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Audiovisual sequence based retrieval using rdf and smil
J. Caldera-Serrano, R. Sánchez-Jiménez

El profesional de la información (2009). Vol. 18, (4), 37

Abstract
In this article we present a proposal for sequence based audiovisual markup and retrieval which can be applied to information management in television. To achieve this we analyze and study audiovisual information on TV, and from this knowledge we generate a vocabulary for markup which might ease and improve information retrieval, providing direct access to sequences according to parameters such as distinguishing among visualized information and referenced information, which provides a working framework better adapted to the domain of audiovisual documentation.
Abstract
In this article we present a proposal for sequence based audiovisual markup and retrieval which can be applied to information management in television. To achieve this we [...]
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Journalists as news librarians (and viceversa?). New relationships between newsroom and archive after media digitization
J. Micó-Sanz, P. Masip, J. García-Avilés

El profesional de la información (2009). Vol. 18, (4), 36

Abstract
Digitization of media archives has improved both news librarians’ and journalists’ work. However, a significant proportion of Spanish journalists prefer searching for information on the Internet rather than in archives. Moreover, the quality of journalists’ work decreases because few journalists receive proper training on information retrieval. Our research is based on ethnographic observation and interviews with more than 70 professionals from several newsrooms carried out between 2001 and 2006, complemented by a survey of the heads of archives at the main channels and newspapers.
Abstract
Digitization of media archives has improved both news librarians’ and journalists’ work. However, a significant proportion of Spanish journalists prefer searching for [...]
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The influence of digital photography on the Documentation departments of the Press
J. Sánchez-Vigil, J. Marcos-Recio, M. Olivera-Zaldua

El profesional de la información (2009). Vol. 18, (4), 35

Abstract
A study of the impact and influence of Digital Photography on the Press Documentation Departments. The photographic archives of the Documentation Departments of the Spanish daily newspapers Abc, El mundo, El país, La razón, La vanguardia and of the EFE news agency are used as reference. The following aspects are analysed: the increase in the number of images, changes in their handling and cataloging, the supply and the demand, profitability and problems. The information has been obtained from the heads of the respective departments based on a questionnaire especially drawn up for this purpose.
Abstract
A study of the impact and influence of Digital Photography on the Press Documentation Departments. The photographic archives of the Documentation Departments of the Spanish [...]
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Memory as a criterion for quality assessment in online newspapers: some considerations
M. Palacios

El profesional de la información (2009). Vol. 18, (4), 34

Abstract
The consolidation of cyberjournalism as a new form of journalistic production in recent years brought about the need to evaluate the quality of newspapers and magazines produced for the Web. Using the same concepts and analytic tools developed for the traditional press in the evaluation of cyberjournalism leads to the undervaluation of specific characteristics of journalistic products designed for the new medium. On the other hand, analytic tools used for website evaluation are generally too generic and ill adapted for the specificities of cyberjournalism. In this article we explore some of the difficulties involved in quality assessment of online journalism. The difficulties in analyzing memory in cyberjournalism is used to indicate some of the challenges posed for the webnewspaper analyst.
Abstract
The consolidation of cyberjournalism as a new form of journalistic production in recent years brought about the need to evaluate the quality of newspapers and magazines produced [...]
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Evaluation of digital press archives: indicators and examples of good practice
J. Guallar, E. Abadal

El profesional de la información (2009). Vol. 18, (4), 33

Abstract
The majority of online newspapers provide access to retrospective information through press archive services, a product of great interest for libraries and other information services. The aim of this study is to identify key indicators for the evaluation of digital press archives and also identify examples of good practices in Spain for each of them. We propose a list of twenty-seven indicators grouped into four main sections (general features, contents, query system, and presentation of results), describe each one and include some examples of successful implementation. Methodologically, the indicators are the result of the review of the literature on evaluating web resources, databases and digital press archives, as well as the analysis of press archive services of newspapers from Spain and Catalonia. The use of these indicators can be useful for libraries and other information services to guide their users in consulting retrospective press information.
Abstract
The majority of online newspapers provide access to retrospective information through press archive services, a product of great interest for libraries and other information [...]
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Elegy for the news library
N. Paul

El profesional de la información (2009). Vol. 18, (4), 32

Abstract
The biography of news researcher Liz Donovan, who died in 2008, serves as a thread of a journey through the profession of news librarian and describes the evolution of newspaper newsrooms throughout 40 years. Information systems and resources have changed -from paper clippings to the Internet and Web 2.0-, but the economic situation of the press has also changed, leading to cutbacks. Unfortunately, with the mistaken idea that “everything is on the Internet”, news companies are devaluing the contributions made by information professionals to newspaper content, and often close or decimate the news libraries, thus losing an important amount of know-how and quality.
Abstract
The biography of news researcher Liz Donovan, who died in 2008, serves as a thread of a journey through the profession of news librarian and describes the evolution of newspaper [...]
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A case study of lending service of electronic books
J. Clavero, M. Codina, A. Pérez, M. Serrat-Brustenga

El profesional de la información (2009). Vol. 18, (4), 31

Abstract
The Rector Gabriel Ferraté Library (BRGF) at the Technical University of Catalonia (UPC) has recently launched an electronic books lending service. This paper describes the experience of evaluating the e-book readers in the current market, the content to be made available on these devices, and how well they actually work, as well as the results of 2 months of ongoing service. Finally, it points to short-term future actions with all four copies of iRex iLiad 2nd Edition available in the library.
Abstract
The Rector Gabriel Ferraté Library (BRGF) at the Technical University of Catalonia (UPC) has recently launched an electronic books lending service. This paper describes the [...]
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How to hire a web positioning service
C. Rovira, L. Codina, M. Marcos

El profesional de la información (2009). Vol. 18, (4), 30

Abstract
A set of recommendations are presented that are intended to be useful for the externalization of a SEO service. The recommendations are articulated around four phases: (1) initial information acquisition, (2) information contrast, (3) hiring, (4) monitoring. The main characteristics of black hat SEO practices, or bad practices in SEO, are presented.
Abstract
A set of recommendations are presented that are intended to be useful for the externalization of a SEO service. The recommendations are articulated around four phases: (1) [...]
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SMS premium messaging platforms
Á. Navarro

El profesional de la información (2009). Vol. 18, (4), 29

Abstract
There are a lot of services that can be accessed using a mobile phone by sending a premium short message (SMS premium). This article describes how the technology behind these contents and multimedia services works. The legislation about these services in Spain is currently being reviewed; the information about costs and basic functionality can be changed with the start up of the new law.
Abstract
There are a lot of services that can be accessed using a mobile phone by sending a premium short message (SMS premium). This article describes how the technology behind these [...]
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Merkur: custom transcodification tool for content adaptation to mobile devices
J. López-de-la-Fuente

El profesional de la información (2009). Vol. 18, (4), 28

Abstract
According to some studies, in 2009 the number of mobile web devices worldwide will be six times greater than that of desktop or laptop devices. These data have awakened the business interests of content providers to maximize the ways of access to their materials. For them, it becomes necessary to use standardized mechanisms for communication and to make content available as widely as possible. The Ctic Foundation (Center for Information Technology and Communication), experts in technical standardization and Web Accessibility based on implementation of the W3C guidelines, presents Merkur tool, which allows pages built following accessibility and standardization recommendations to adapt to mobile devices following the W3C guidelines and recommendations, in a simple and effective manner.
Abstract
According to some studies, in 2009 the number of mobile web devices worldwide will be six times greater than that of desktop or laptop devices. These data have awakened the [...]
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Mobile web and its introduction in the Spanish local administration
R. Voces-Merayo, L. Codina

El profesional de la información (2009). Vol. 18, (4), 27

Abstract
In recent years, mobile technologies have become more and more important in the social information ecosystem and they are a real option for accessing the Web. Each time there are more and more people that use the mobile web, and each time there are more portals that offer services for this kind of users. The web mobile concept and its main characteristics are presented, as well as the degree of adoption of the mobile web in the local Spanish administration, both quantitatively and qualitatively.
Abstract
In recent years, mobile technologies have become more and more important in the social information ecosystem and they are a real option for accessing the Web. Each time there [...]
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The architectural visa project: documental description, characterization and normalization
E. Orduña-Malea

El profesional de la información (2009). Vol. 18, (4), 26

Abstract
Architectural documentation is a key element of knowing our cultural heritage. The heterogeneity and complexity of this documentation causes problems in their proper description and subsequent retrieval in databases. This work focuses on a specific typology within this type of documentation: the visa project. First, this typology is characterized as a document, defining, describing and analyzing its constituent parts according to the variety of laws and standards that govern it. Second, a conceptual design is proposed as a basis for construction of a project database system. Finally, the Inpav (National identifier of visa architectural projects) is suggested as standard identification.
Abstract
Architectural documentation is a key element of knowing our cultural heritage. The heterogeneity and complexity of this documentation causes problems in their proper description [...]
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Linguistic treatment of questions in Spanish for question classification in question answering systems
M. Olvera-Lobo, N. Robinson-García

El profesional de la información (2009). Vol. 18, (4), 25

Abstract
We propose a procedure for the linguistic treatment of Spanish questions as a step prior to their classification in question answering systems. The main types of questionanswering systems and their basic architecture are described. We review the principal question classification taxonomies used to date and the different fields from which they have been derived. Finally, we present the stages of linguistic analysis that the text of questions in question answering systems should be subject to in order to facilitate the location of appropriate answers.
Abstract
We propose a procedure for the linguistic treatment of Spanish questions as a step prior to their classification in question answering systems. The main types of questionanswering [...]
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Evaluation of DocuMenea, a social platform for Library and Information Science news
D. Torres-Salinas, J. Guallar

El profesional de la información (2009). Vol. 18, (4), 24

Abstract
One of the most popular services in web 2.0 is the social promotion of news. Digg and Menéame –the second one in Spain and Latin America–, are very well known. Using Menéame open code, a team of information professionals created DocuMenea with the same characteristics but limited to Library and Information Science. This paper presents an evaluation of this service from its creation in November 2006 to December 2008. The results show that 2,166 news items were sent and 1,610 were published. The service has 582 users, with unequal participation because 74% of them never had sent any news and 91% did not vote on any occasion. Four thematic areas were identified: Google, libraries, social networking / Web 2.0, and the book. Finally, sources in which the top three positions were occupied by daily general interest newspapers were ranked as the most important to DocuMenea.
Abstract
One of the most popular services in web 2.0 is the social promotion of news. Digg and Menéame –the second one in Spain and Latin America–, are very well known. Using [...]
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Telecentres in Spain: networks and content
A. Morales-García, M. Caridad-Sebastián, F. García-López

El profesional de la información (2009). Vol. 18, (4), 23

Abstract
Spanish telecentres are a catalyst and inclusion instrument in the information society. Nevertheless, there is a lack of studies describing the activities performed by these entities in their areas of impact. With this goal in mind, research was conducted to analyse the current situation of the telecentres, the strengthening of their networks and the activities undertaken. It is the goal of this paper to formulate a “resources and services model” as the framework for decision taking by political authorities or as a rethinking and analysis device for social agents.
Abstract
Spanish telecentres are a catalyst and inclusion instrument in the information society. Nevertheless, there is a lack of studies describing the activities performed by these [...]
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From Social Web to Mobile 2.0: The 2.0 paradigm in the mediatization process of mobile communications
J. Aguado-Terrón, I. Martínez-Martínez

El profesional de la información (2009). Vol. 18, (4), 22

Abstract
Due to their increasing connectivity and processing power, mobile devices are engaged in a process of mediatization that involves, on one side, conventional media related paradigms (standardized contents, pay per access, individualized passive consumption) and, on the other side, the Social Web related 2.0 paradigm (personalized and user generated content, third party open environments, collaborative work, prevalence of ‘sharing’ logics, etc.). This paper poses a general framework of those factors that enable the relevance of the Web 2.0 paradigm in the current development of market and data consumption in mobile devices, including some conceptual outline that may prove useful in future research of the evolution of mobile content production, business and consumption models.
Abstract
Due to their increasing connectivity and processing power, mobile devices are engaged in a process of mediatization that involves, on one side, conventional media related [...]
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