8,230 research outputs found
Software Engineering Timeline: major areas of interest and multidisciplinary trends
Ingeniería del software. EvolucionSociety today cannot run without software and by extension, without Software Engineering. Since this discipline emerged in 1968, practitioners have learned valuable lessons that have contributed to current practices. Some have become outdated but many are still relevant and widely used. From the personal and incomplete perspective of the authors, this paper not only reviews the major milestones and areas of interest in the Software Engineering timeline helping software engineers to appreciate the state of things, but also tries to give some insights into the trends that this complex engineering will see in the near future
Iceberg transport technologies in spatial competition. Hotelling reborn
Transport costs in address models of differentiation are usually modeled as separable of the consumption commodity and with a parametric price. However, there are many sectors in an economy where such modeling is not satisfactory either because transportation is supplied under oligopolistic conditions or because there is a difference (loss) between the amount delivered at the point of production and the amount received at the point of consumption. This paper is a first attempt to tackle these issues proposing to study competition in spatial models using an iceberg-like transport cost technology allowing for concave and convex melting functions.Spatial Competition, Iceberg transport costs
Informational efficiency in distressed markets: The case of European corporate bonds
This paper investigates the effect of the 2008 financial crisis on informational efficiency by carrying out a long-memory analysis of European corporate bond markets. We compute the Hurst exponent for fifteen sectorial indices to scrutinise the time-varying behaviour of long-range memory, applying a shuffling technique to avoid short-term correlation. We find that the financial crisis has uneven effects on the informational efficiency of all corporate bond sectors, especially those related to financial services. However, their vulnerability is not homogeneous and some nonfinancial sectors suffer only a transitory effect.Fil: Fernández, Aurelio. Universitat Rovira I Virgili; EspañaFil: Guercio, María Belén. Universidad Provincial del Sudoeste; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Económicas y Sociales del Sur. Universidad Nacional del Sur. Departamento de Economía. Instituto de Investigaciones Económicas y Sociales del Sur; ArgentinaFil: Martinez, Lisana Belén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Investigaciones Económicas y Sociales del Sur. Universidad Nacional del Sur. Departamento de Economía. Instituto de Investigaciones Económicas y Sociales del Sur; Argentina. Universidad Provincial del Sudoeste; Argentin
Coaching-Based Leadership Intervention Program: A Controlled Trial Study
In spite of the potential benefits that coaching-based leadership interventions can bring
to organizations, basic questions remain about their impact on developing coaching
skills and increasing psychological capital (PsyCap), work engagement and in- and
extra-role performance. In a controlled trial study, 41 executives and middle managers
(25 in the experimental group and 16 in the waiting-list control group) from an automotive
sector company in Spain received pre-assessment feedback, a coaching-based
leadership group workshop, and three individual executive coaching sessions over a
period of 3 months. The intervention program used a strengths-based approach and the
RE-GROW model, and it was conducted by executive coaching psychologists external
to the organization. Participants (N = 41) and their supervisors (N = 41) and employees
(N = 180) took part in a pre-post-follow up 360-degree assessment during the research
period. Quantitative data were analyzed using Analyses of Variance (ANOVA) with a
2 2 design, paired-samples t-tests, and univariate analyses between groups. Results
indicated that the intervention program was successful in increasing the participants’
coaching-based leadership skills, PsyCap, work engagement, and in- and extrarole
performance. Qualitative measures were also applied, and results from individual
responses provided additional support for the study hypotheses. Regarding practical
implications, the results suggest that the Coaching-based Leadership Intervention
Program can be valuable as an applied positive intervention to help leaders develop
coaching skills and enhance well-being and optimal functioning in organizations
Resilient Distributed Energy Management for Systems of Interconnected Microgrids
In this paper, distributed energy management of interconnected microgrids,
which is stated as a dynamic economic dispatch problem, is studied. Since the
distributed approach requires cooperation of all local controllers, when some
of them do not comply with the distributed algorithm that is applied to the
system, the performance of the system might be compromised. Specifically, it is
considered that adversarial agents (microgrids with their controllers) might
implement control inputs that are different than the ones obtained from the
distributed algorithm. By performing such behavior, these agents might have
better performance at the expense of deteriorating the performance of the
regular agents. This paper proposes a methodology to deal with this type of
adversarial agents such that we can still guarantee that the regular agents can
still obtain feasible, though suboptimal, control inputs in the presence of
adversarial behaviors. The methodology consists of two steps: (i) the
robustification of the underlying optimization problem and (ii) the
identification of adversarial agents, which uses hypothesis testing with
Bayesian inference and requires to solve a local mixed-integer optimization
problem. Furthermore, the proposed methodology also prevents the regular agents
to be affected by the adversaries once the adversarial agents are identified.
In addition, we also provide a sub-optimality certificate of the proposed
methodology.Comment: 8 pages, Conference on Decision and Control (CDC) 201
Banking on Foreigners: The Behaviour of International Bank Lending to Latin America, 1985-2000",
Rising international bank financing to developing countries has motivated a debate on the behavior of these claims. We analyze claims from seven home (lender) countries on ten host (borrower) countries in Latin America. We find that banks transmit shocks from their home countries and changes in their claims on other countries spill over to individual hosts. However, lending has become less “indiscriminate” and more responsive to host conditions over time. Responsiveness to the latter becomes less “pro-cyclical” as exposure increases. Finally, foreign bank lending reacts more to positive than to negative host shocks and is not significantly curtailed during crises.
Antecedents of academic performance of university students: academic engagement and psychological capital resources
Predicting academic performance is of key importance to the success, wellbeing and
prosperity of students, their families, the economy, and the society at large. This study
investigates the relationship between academic engagement, psychological capital (PsyCap) and
academic performance. Data were collected in two different universities, one in Spain and
another in Portugal. Students completed two self-report questionnaires regarding academic
engagement and Psychological Capital. Academic performance was assessed through Grade
Point Average, provided by the universities at the end of the exam period. The samples consisted
of 389 and 243 undergraduate students, respectively. Results showed a positive relationship
between academic engagement and PsyCap, on the one hand, and academic performance on the
other, in both samples. Results also supported PsyCap as a full mediator in the relationship
between academic engagement and academic performance. Exploration of alternative models
yielded superior fit for the proposed model. Accordingly, academically engaged students were
likely to experience higher levels of PsyCap, which in turn positively impacted their academic
performance. The results point to the importance of considering psychological predictors, rather
than the prevalent reliance on traditional predictors of academic performance
La percepción de restauración ambiental de la vivienda y el funcionamiento familiar
La Escala de Percepción de Restauración Ambiental (EPRAR; Martínez-Soto & Montero, 2007) y sus factores: Compatibilidad, Fascinación, Alcance, Coherencia y Estar Alejado y el indicador de Preferencia Ambiental fueron empleados para documentar las cualidades restauradoras de la vivienda y su influencia en la funcionalidad familiar. Se hipotetizó que la percepción de restauración ambiental de la vivienda se relacionaría positivamente con la evaluación de tranquilidad, orden y control en casa. Se efectuaron 117 entrevistas intradomiciliarias con adolescentes y adultos (edad media 45.85 años, 61 hombres y 56 mujeres) de la Zona Metropolitana del Valle de México. Los hallazgos evidenciaron que existieron relaciones positivas y significativas entre las dimensiones de la EPRAR Compatibilidad, Coherencia, Alcance y Preferencia Ambiental con el funcionamiento familiarThe Perception of Environmental Restoration Scale (PERSR; Martínez-Soto & Montero, 2007) was used to document the influence of restorative qualities of housing on family functioning through the following factors: Compatibility, Fascination, Scope, Coherence, Being Away and the Environmental Preference Indicator. It was hypothesized that the perception of environmental restoration of housing is positively related to the assessment of home peacefulness, order and control. 117 in home interviews were carried out with adolescents and adults (mean age of 45.85 years, 61 males and 56 females) from the Mexican Valley Metropolitan Area. Findings showed positive and significant relations between the PERSR dimensions of Compatibility, Coherence, Scope and Environmental Preference, and family functionin
Memoria Histórica: La mujer española, prototipo de la informante sobre la tradición oral
La mujer española es prototipo de la informante sobre la tradición oral por el repertorio que siempre ha interpretado, uniéndolo al ciclo vital. Empezando por las canciones de cuna, que son canciones de trabajo porque las cantaban las madres para dormir a sus hijos mientras trabajaban; siguiendo con las canciones infantiles, principales herederas en la actualidad del repertorio del cancionero europeo antiguo; aunque es un repertorio cantado indistintamente, en su origen, por niños y niñas, en cambio es transmitido en casi su totalidad por mujeres informantes. Con las canciones de boda, se interpretaba todo el repertorio heredado de la tradición sefardita: canciones de despedida de las amigas de la novia, petitorias de los convites, etc.; era el repertorio que acompañaba a la mujer al tránsito de la vida matrimonial, que popularmente era el status social más reconocido después de la maternidad. Y, finalmente, las canciones petitorias por los difuntos, cantadas por otras mujeres a la mujer o al hombre que ha culminado su ciclo vital
Updating the recollection of documentary sources for the study of Kurt Schindler’s life and work.
[En] En este congreso internacional se presenta la investigación actualizada sobre las fuentes primarias y secundarias sobre la figura polifacética del etnomusicólogo, intérprete y compositor alemán Kurt Schindler (1884-1935)
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