Search results for "ICAD"

Prioritization of maintenance actions in water distribution systems

2017

[EN] Industrial water distribution systems are paramount in many manufacturing systems to optimise the related industrial plant availability and consequently the level of production. They also play an important part in keeping right standards of hygiene of workplaces and machines. A strategic action of planning and implementing of suitable maintenance activities is necessary to assure the standards previously described. The present contribution proposes the prioritization of maintenance actions for industrial water distribution systems through a multi-criteria decision making approach, since some of the elements integrated in maintenance-related aspects are not easily quantifiable and, on t…

La información no financiera en el sector público : alternativas, tendencias y oportunidades

2019

In recent years, different non-financial information models have arisen, both in the private and public sectors, trying to complete the traditional financial reports prepared by companies and public administrations. The fundamental objective of these models has been to satisfy the interest of the stakeholders, which goes beyond the numbers included in the balance sheet and the income statement. In the case of the public sector, this is coupled with the discontent and distrust of citizens towards politicians and administrators of institutions, which makes it necessary to emphasize tools and strategies that can improve the transparency and accountability of administrations and restore citizen…

Survival analysis of author keywords: An application to the library and information sciences area

2020

[EN] Our purpose is to adapt a statistical method for the analysis of discrete numerical series to the keywords appearing in scientific articles of a given area. As an example, we apply our methodological approach to the study of the keywords in the Library and Information Sciences (LIS) area. Our objective is to detect the new author keywords that appear in a fixed knowledge area in the period of 1 year in order to quantify the probabilities of survival for 10 years as a function of the impact of the journals where they appeared. Many of the new keywords appearing in the LIS field are ephemeral. Actually, more than half are never used again. In general, the terms most commonly used in the …

The Hierarchical Mixed Rural Postman Problem: Polyhedral analysis and a branch-and-cut algorithm

2017

[EN] The Hierarchical Mixed Rural Postman Problem is defined on a mixed graph where arcs and edges that require a service are divided into clusters' that have to be serviced in a hierarchical order. The problem generalizes the Mixed Rural Postman Problem and thus is NP-hard. In this paper, we provide a polyhedral analysis of the problem and propose a branch-and-cut algorithm for its solution based on the introduced classes of valid inequalities. Extensive computational experiments are reported on benchmark instances. The exact approach allows to find the optimal solutions in less than 1 hour for instances with up to 999 vertices, 2678 links, and five clusters.

Group Extensions and Graphs

2016

A classical result of Gaschütz affirms that given a finite A-generated group G and a prime p, there exists a group G# and an epimorphism phi: G# ---> G whose kernel is an elementary abelian p-group which is universal among all groups satisfying this property. This Gaschütz universal extension has also been described in the mathematical literature with the help of the Cayley graph. We give an elementary and self-contained proof of the fact that this description corresponds to the Gaschütz universal extension. Our proof depends on another elementary proof of the Nielsen-Schreier theorem, which states that a subgroup of a free group is free.

Métodos numéricos para ingeniería química (2008/09)

2008

Virtual learning environment and academic outcomes: Empirical evidence for the teaching of Management Accounting

2014

ResumenEl objetivo fundamental de este trabajo consiste en contrastar empíricamente si el uso de un entorno virtual de aprendizaje (EVA) afecta positivamente a los resultados académicos de los estudiantes. El EVA desarrollado ha sido aplicado en la asignatura Contabilidad de Gestión, del Grado en Finanzas y Contabilidad de la Universitad de València. Esta experiencia de innovación docente, fundamentada en la teoría constructivista, combina diversos objetos de aprendizaje en el contexto de la plataforma Moodle. Su diseño implica un incremento de la motivación, el interés y la autogestión del aprendizaje de los estudiantes, al mismo tiempo que proporciona al profesorado instrumentos para eval…

Perfiles innovadores en la agricultura valenciana

2013

[EN] Farmers are the main actors of innovation in the agricultural sector. This study focuses on the socio-economic profile of the Valencian farmer and his/her attitude towards innovation. Adopting a position inclined to innovate depends on multiple factors that influence bussiness management. This paper uses data from a farmers’ survey, which was designed ad hoc for the research, that considers the socioeconomic factors that make farmers take a position favorable to innovation. Later, the study focuses on a typical profile of innovative producers, according to their characteristics, taking into account market orientation, learning orientation and innovative attitude. The results show a pos…

[CoII(4-terpyridone)2]X2: a novel cobalt(II) spin crossover system [4-terpyridone = 2,6-bis(2-pyridyl)-4(1H)-pyridone].

2001

[EN] The cationic complex [Co(4-terpyridone)(2)](2+) where 4-terpyridone is the terpy-like ligand 2,6-bis(2-pyridyl)-4-(1H)-pyridone has been synthesized. High-spin and different spin crossover behaviors have been observed in the solid state depending on the counterion SO42-, Cl-, or ClO4-. The room temperature crystal structure of the spin crossover compound [Co(4-terpyridone)(2)](ClO4)(2).H2O is described.

An analysis of the scientific productivity and visibility of publications on usability (1971-2005)

2009

Aims: To analyse usability-related articles published in the period 1971-2005 from a bibliometric point of view. Methods: A search for articles was made in the CSIC databases, the Social Science Citation Index, Science Citation Index, PsycInfo, MEDLINE and Inspec databases, using ad hoc search strategies designed for each. Contribution, specific contribution and overlap indices were calculated, as were the indicators of change in scientific production, the productivity of institutions and journals, and the distribution of journals by area of knowledge. Results: An exponential increase in the number of published articles was recorded, with the highest increase seen over the last five years. …