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This paper aims to address the numerical simulation of additive manufacturing (AM) processes. The numerical results are compared with the experimental campaign carried out at State Key Laboratory of Solidification Processing laboratories, where a laser solid forming machine, also referred to as laser engineered net shaping, is used to fabricate metal parts directly from computer-aided design models. Ti-6Al-4V metal powder is injected into the molten pool created by a focused, high-energy laser beam and a layer of added material is sinterized according to the laser scanning pattern specified by the user.

The numerical model adopts an apropos finite element (FE) activation technology, which reproduces the same scanning pattern set for the numerical control system of the AM machine. This consists of a complex sequence of polylines, used to define the contour of the component, and hatches patterns to fill the inner section. The full sequence is given through the common layer interface format, a standard format for different manufacturing processes such as rapid prototyping, shape metal deposition or machining processes, among others. The result is a layer-by-layer metal deposition which can be used to build-up complex structures for components such as turbine blades, aircraft stiffeners, cooling systems or medical implants, among others.

Ad hoc FE framework for the numerical simulation of the AM process by metal deposition is introduced. Description of the calibration procedure adopted is presented.

The objectives of this paper are twofold: firstly, this work is intended to calibrate the software for the numerical simulation of the AM process, to achieve high accuracy. Secondly, the sensitivity of the numerical model to the process parameters and modeling data is analyzed.

A finite element model has been developed for the 3D simulation of the sintering of a single track during a selective laser sintering process (SLS). The model takes into account both the thermal and the sintering phenomena involved in the process. Owing to the continuous movement of the laser beam the model takes also into account the transient nature of the problem. This is transformed into a pseudo‐static one through a transformation of the coordinates system of the equations. Nevertheless, this transformation introduces a convective term into the heat equations that produces instabilities in the solution. These instabilities have been solved by using a stream upwind Petrov Galerkin (SUPG) strategy together with a shock capturing scheme. Finally, a fixed point strategy is used for the solution of the analysis. The model has been tested through the solution of some examples.

Stereolithography (SLA) is one of the most important techniques used in rapid prototyping processes. It has a great industrial interest because it allows for dramatic time savings with respect to traditional manufacturing processes. One of the main sources of error in the final dimensions of the prototype is the curl distortion effect owing to the shrinkage of the resin during the SLA process. Presents a study of the influence of different constructive and numerical parameters in the curl distortion, an analysis which was made using the computer code stereolithography analysis program, developed to model SLA processes using the finite element method. Also briefly presents this code.

The purpose of this paper is to analyze the circumstances that have conditioned the development of education in Spain from the enlightenment to the present day.

Multidisciplinary scientific approach that combines the interpretation of the legal texts with the revision of the doctrinal and theoretical contributions made on the issue.

From the beginning of the nineteenth century, the history of education in Spain has been marked by constant fluctuations between the reactionary instincts, principally maintained by the Catholic Church and the conservative social classes, and the progressive experiments, driven by the enlightened and the liberals first, and the republicans and the socialists later. As a consequence of that, the fight for finishing with illiteracy and guaranteeing universal schooling underwent permanent advances and retreats, preventing from an effective modernization of the Spanish educative system. On the one hand, renewal projects promoted by teachers and pedagogues were inevitably criticized by the ecclesiastical hierarchy, obsessed with the idea of preserving the influence of religion on the schools. On the other hand, successive governments were weak in implementing an educational policy which could place Spain at the level of the other European and occidental nations.

At the dawn of the twenty-first century, although the country has overcome a good part of its centuries-old backwardness, increasing economic difficulties and old ideological splits keep hampering the quality of teaching, gripped by neoliberal policies which undermine the right to education for all. The reading of this paper offers various historical clues to understand this process.

Spain departed from the Southern European tradition of residual long-term care services with the 2006 reform. The paper aims to present the main traits of the reform and its implementation, explores the reasons that may explain why the reform happened and to which extent and why it fell short of expectations.

The article draws on available literature on the reform and on administrative data to present a complex and nuanced view of the reform process and its limits.

The reform was actually a measure to enhance and rationalize a preexisting process of social care services development, rather than the creation of a completely new care system. A rapid increase in female labor market participation since the 1990s and the looming demands of a late baby-boom and the subsequent fertility crash appear to be two key factors that explain both the previous development and its bolstering by the reform. The budgetary constraints of the Great Recession and governance problems, linked to a complex and sometimes dysfunctional multilevel governance arrangement, help to understand why the reform bogged down. Nevertheless, the overall balance is more nuanced, and significantly more services are provided 12 years after the reform.

While many assessments of the reform have been negative, putting it into a larger context of social care development, the 2006 Dependency Act has contributed to a significant increase in expenditure and coverage. The impact of budgetary restrictions has been important, but other factors, such as governance arrangements, may explain more of the problems of the implementation.

The issue of linguistic autonomy is a central one on the agenda of Catalan politics within the Spanish state. In the transition from Francoism, virtually all political groups in Catalonia supported a statute of autonomy (1982) which declares that “Catalan is the official language of Catalonia, as is Castillian, the official language of the entire Spanish State.”

The purpose of this study is twofold: to evidence the disclosure practices of Spanish companies in relation to a voluntary typology of strategic information; and to determine the factors that explain these practices. Among the factors considered, the study seeks to focus on the role of the Board of Directors in depth. According to Agency Theory, strategic information has positive consequences on external funds costs. On the other hand, Proprietary Costs theory limits these practices, given that they can lead to competitive disadvantages.

First, online strategic information disclosure practices are analysed by examining non‐financial quoted Spanish firms. A disclosure index is created, and subsequently, certain factors related to corporate governance – Activity, Size and Board Independence – as well as other factors traditionally analysed, are used to explain the volume of strategic information disclosed on the internet.

The results indicate that Spanish companies, on average, give out little strategic information, mainly related to objectives, their mission, and the company's philosophy. “Company annual planning” and “Information on risks” are scarcely disclosed. The findings also emphasise that companies where the Chairperson of the Board is the same person as the CEO and, moreover, in which there is a lower frequency of meetings, disclose a greater amount of strategic information on their web sites.

The findings suggest that the disclosure of strategic information is a decision taken by executives with the aim of satisfying the demands of creditors and investors. The Board of Directors represents the shareholders' interests, but it does not participate in strategic decision‐making disclosure, maybe due to the fact that the proprietary costs lack influence.

The link between corporate governance and strategic information disclosed online has scarcely been analysed in previous literature. This study provides interesting insights into how several Board characteristics can affect the disclosure of strategic information on the internet.

The aim of this paper is to provide empirical evidence of discrepancies in certain management-related business factors in complex situations from a gender perspective.

The study examined whether there are any differences in the characteristics of Spanish companies run by men and women and how male and female chief executive officers (CEOs) perceive critical situations such as the COVD-19 pandemic. To answer the research questions, the survey carried out by the Ibero-American Observatory of Small and Medium-Sized Enterprises (FAEDPYME) in 2021 was used. The final sample consisted of a total of 1,532 small and medium-sized enterprises.

The main results show that female CEOs are more likely to have a university education than male CEOs, but they run smaller companies in Spain. On the other hand, they are more risk averse and evaluate the impact of complex and risky situations more negatively.

The findings open up new research questions. This is a cross-sector study, but are there differences in behaviour between sectors? The view of the crisis is negative, but which types of companies have been strengthened?, finally, do other countries have similar results?

The originality and value of this document lies in the fact that it makes an interesting contribution to the open debate on the management of complex situations from a gender perspective.

The purpose of this paper is to draw insights from the actors-resources-activities (ARA) model and social capital literature to identify relevant activities shared by university-industry (U-I) actors prior to R & D cooperation.

Based on a qualitative methodology, a series of interviews were carried out with researchers from the biological sciences domain.

This study found that, at the outset of U-I links, companies’ motivations are strongly organizational, while academics are motivated at a personal level. The interactions grow from low-risk activities to partnerships on complex tasks, and depend on relational resources framed within the ARA and social capital theories. Results showed that shared interests are present at the outset of U-I links and grow thereafter. Trust and commitment were not ubiquitous at the outset, but rather at later stages of the cooperation, as a result of the developed interdependencies.

The combination of the ARA model and social capital in U-I links highlighted the different relationship levels (individual vs organizational), the disparities between early and established ties, and the interplay between low- and high-investment activities underlying researchers’ relationships. Several managerial contributions are presented for universities to promote greater integration with industry partners.

A new direction of research is presented towards lower levels of U-I cooperation, taking into account the relational resources and the activities shared in each level. This work distinguished the different actors’ motivations and clarified the role of trust and commitment at the outset of U-I links. This first assessment of Portuguese U-I interactions within the biological sciences provided valuable insights for both academics and practitioners.