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Rodriguez A.,Alfonso X El Sabio University | Ortega F.,University of Oviedo | Concepcion R.,University of Oviedo
Information Sciences | Year: 2017

Over the past twenty years, institutions and individuals have proposed a wide variety of standards, models and methodologies for the management of risk, many of which can be applied to projects in the area of information technology (IT). The purpose of this research was to develop a method for the selection of the most suitable option for the management of risk in IT projects, in accordance with the needs of the organization. In order to obtain a simplified, more intuitive and easier to implement method, we developed a new graphical vectorial approach by modifying an intuitionistic procedure for its adaptation as a multi-criteria tool for managerial decision-making. The method is complemented by Mean-Variance calculations. The weights of the evaluation criteria are obtained by a graphical approach to the Fuzzy analytic hierarchy process (FAHP). The application of the proposed method was preceded by a documentary research and the use of mapping study techniques for the pre-selection of options. A numerical example based on a case study permits to test the suitability of the proposal. Several future lines of investigation are proposed. © 2016 Elsevier Inc.


Garnacho-Castano M.V.,University of Barcelona | Lopez-Lastra S.,Institute Pasteur Paris | Mate-Munoz J.L.,Alfonso X El Sabio University
Journal of Sports Science and Medicine | Year: 2014

The objectives of the study were to determine the validity and reliability of peak velocity (PV), average velocity (AV), peak power (PP) and average power (AP) measurements were made using a linear position transducer. Validity was assessed by comparing measurements simultaneously obtained using the Tendo Weightlifting Analyzer System® and T-Force Dynamic Measurement System® (Ergotech, Murcia, Spain) during two resistance exercises, bench press (BP) and full back squat (BS), performed by 71 trained male subjects. For the reliability study, a further 32 men completed both lifts using the Tendo Weightlifting Analyzer System® in two identical testing sessions one week apart (session 1 vs. session 2). Intraclass correlation coefficients (ICCs) indicating the validity of the Tendo Weightlifting Analyzer System® were high, with values ranging from 0.853 to 0.989. Systematic biases and random errors were low to moderate for almost all variables, being higher in the case of PP (bias ±157.56 W; error ±131.84 W). Proportional biases were identified for almost all variables. Test-retest reliability was strong with ICCs ranging from 0.922 to 0.988. Reliability results also showed minimal systematic biases and random errors, which were only significant for PP (bias -19.19 W; error ±67.57 W). Only PV recorded in the BS showed no significant proportional bias. The Tendo Weightlifting Analyzer System® emerged as a reliable system for measuring movement velocity and estimating power in resistance exercises. The low biases and random errors observed here (mainly AV, AP) make this device a useful tool for monitoring resistance training. © 2014, Journal of Sports Science and Medicine.


Garnacho-Castano M.V.,University of Barcelona | Dominguez R.,Alfonso X El Sabio University | Mate-Munoz J.L.,Alfonso X El Sabio University
International Journal of Sports Medicine | Year: 2015

This study compares acute cardiorespiratory, metabolic, mechanical and rating of perceived effort (RPE) responses to 2 different prolonged constant-load exercises, half-squat (HS) and cycle ergometry, performed at a workload corresponding to the lactate threshold (LT). A total of 18 healthy subjects completed 5 exercise tests separated by 48-h rest periods: an incremental cycle ergometer test, a constant-load cycle ergometer test at LT intensity, a one-repetition maximum (1RM) HS test, an incremental HS test and a constant-load HS test at LT intensity. In both constant-load tests, cardiorespiratory, metabolic and RPE data were recorded. Mechanical responses before and after each test were assessed in terms of jump height and mean power measured in a counter movement jump (CMJ) test. In both exercises, cardiorespiratory and metabolic responses stabilized, though cardiorespiratory responses were significantly greater for cycle ergometry (P<0.001), with the exception of respiratory exchange ratio (RER), which was higher for HS (P=0.028). Mechanical fatigue was observed in only HS (P<0.001). In conclusion, different exercise modalities induced different yet stable acute cardiorespiratory and metabolic responses. Although such responses were significantly reduced in HS, greater mechanical fatigue was produced, most likely because of the particular muscle actions involved in this form of exercise. © Georg Thieme Verlag KG Stuttgart · New York.


Josa D.,University of Santiago de Compostela | Rodriguez-Otero J.,University of Santiago de Compostela | Cabaleiro-Lago E.M.,Alfonso X El Sabio University | Rellan-Pineiro M.,University of Santiago de Compostela
Chemical Physics Letters | Year: 2013

The performance of a variety of DFT-D functionals with empirical dispersion correction (B97-D, PBE-D, B-LYP-D, BP86-D) and specialized functionals for the treatment the non-covalent interactions (M05-2X, M06-2X) has been evaluated on four representative groups of complexes with π⋯π interactions: (1) dispersion-dominated complexes taken from the S22 database; (2) complexes with eclipsed planar polycyclic aromatic hydrocarbons, PAHs; (3) complexes with curved PAHs; (4) mixed complexes made up by planar and curved PAHs. Our study shows that, in general, calculations employing DFT-D functionals provide more accurate interaction energies than those from M05-2X and M06-2X. © 2012 Elsevier B.V. All rights reserved.


Rodriguez A.,Alfonso X El Sabio University | Ortega F.,University of Oviedo | Concepcion R.,University of Oviedo
Expert Systems with Applications | Year: 2013

The acquisition of custom design equipment may be accomplished by selecting a supplier to launch a product development project. That selection is usually performed by a bidding process that requires a procedure for the evaluation of proposals. This paper proposes a modification to a method for multi-criteria decision analysis as a support in evaluation. The method, originally implemented by several authors, is based on a combination of fuzzy Analytic Hierarchy Process (AHP) and the Technique for Order Preference by Similarity to the Ideal Solution (TOPSIS). The proposed modifications permit the direct entry of data to three types of parameters (numerical parameters, binary descriptors and linguistic variables). The calculation of weights for each evaluation criterion is performed by a new approach to fuzzy AHP that facilitates the assessment and permits the simultaneous verification of consistency. The proposed improved method includes a procedure for the detection and analysis of possible problems of rank reversal. A numerical example is presented using data from an actual case of a request for proposals for the supply of customized lottery ticket printers. © 2012 Elsevier Ltd. All rights reserved.


Martin A.,Alfonso X El Sabio University
Revista Espanola de Cardiologia Suplementos | Year: 2013

Atrial fibrillation is the most frequently encountered sustained arrhythmia in emergency departments. In Spain, it is becoming increasingly common. It is a serious condition that often affects elderly individuals who are at a high risk of stroke, who may have structural heart disease and associated comorbid conditions, and who usually present with acute symptoms associated with the arrhythmia. All of these factors have an important influence on treatment decisions. Since episodes of recent-onset atrial fibrillation are usually managed in the emergency department, it is vitally important that these departments implement appropriate treatment that increases the likelihood that sinus rhythm will be restored and that establishes prophylaxis for stroke as early as possible. This article contains a review of the methods of stroke prophylaxis used during the restoration of sinus rhythm, the aim of and strategies used for heart rate control, and the indications for, the factors influencing decisions on and the techniques used for restoring sinus rhythm, with particular emphasis on episodes of recent-onset atrial fibrillation. © 2013 Sociedad Españñola de Cardiologíía.


Ochoa-Gomez J.R.,Tecnalia | Ochoa-Gomez J.R.,Alfonso X El Sabio University | Gomez-Jimenez-Aberasturi O.,Tecnalia | Ramirez-Lopez C.,Tecnalia | Belsue M.,Tecnalia
Organic Process Research and Development | Year: 2012

Glycerol carbonate is one the glycerol derivatives which attracts attention for industrial applications. This review compares strategies for its synthesis, and their analyses lead to the conclusion that (indirect) procedures starting from glycerol- and/or CO 2-derivatives are the most attractive. These are described and compared, taking criteria of industrial feasibility into account. As a result, the transesterification of dimethyl carbonate or ethylene carbonate with glycerol using uncalcined CaO as catalyst appears to be currently the most suitable industrial process. Finally, potential applications of glycerol carbonate as a multifunctional compound are exemplified. © 2012 American Chemical Society.


Ochoa-Gomez J.R.,Tecnalia | Ochoa-Gomez J.R.,Alfonso X El Sabio University | Gomez-Jimenez-Aberasturi O.,Tecnalia | Ramirez-Lopez C.,Tecnalia | Maestro-Madurga B.,Tecnalia
Green Chemistry | Year: 2012

The synthesis of glycerol 1,2-carbonate (GC) by transesterification of glycerol with dimethyl carbonate (DMC) using triethylamine (TEA) as a facile separable homogeneous catalyst has been studied at different temperatures, DMC/glycerol molar ratios and TEA/glycerol molar ratios. Reaction rate increases dramatically with temperature and TEA/glycerol molar ratio but the reaction is difficult to stop in the target molecule at the highest TEA/glycerol molar ratios because GC undergoes further transesterification to glycerol dicarbonate (GDC). However, good reaction control can be achieved by working at a TEA/glycerol molar ratio of 0.1: a 99% glycerol conversion and a 98% GC yield are obtained in 2.5 h with a DMC/glycerol molar ratio of 4 at refluxing temperature (88°C → 68°C). At 90°C glycidol is also formed in 6-10% yields. A mechanism to justify its synthesis is proposed. GDC formation can be avoided at conversions below 100% but in this case GC is highly impurified with glycerol after solvent removal by evaporation. To separate both chemicals a liquid-liquid extraction method has been developed. Selective extraction solvents for GC, such as methyl isobutyl ketone (MIBK) or DMC, were found using the method of miscibility numbers. GC is selectively extracted at room temperature in MIBK in a 100% yield with purity higher than 98% from a glycerol-GC mixture consisting of 80 wt% GC by using a MIBK/mixture mass ratio of 1.6 and three extraction steps. © 2012 The Royal Society of Chemistry.


Agud J.L.,Alfonso X El Sabio University
Revista Clinica Espanola | Year: 2014

Between 0% and 94% of university students acknowledge having committed academic fraud. Its forms are varied: cheating on examinations, submitting someone else's work, plagiarism, false citations, false reporting on experiments, tests or findings in the medical history and physical examination, unfair behavior toward fellow students, and many others. The consequences of academic fraud include learning corruption, useless efforts by students and faculty, incorrect performance evaluations and unfair selection for jobs. Since this can be a prelude to future fraud as doctors or researches, the prevalence, risk factors, motivations, clinical appearances, detection and prevention of the disease of academic fraud are here reviewed. © 2014 Elsevier España, S.L.U. All rights reserved.


Sampedro Rodriguez A.,Alfonso X El Sabio University
Carreteras | Year: 2013

This article analyzes and updates the use of waste in road construction, considering waste from the road itself, the activities of the construction sector and industrial and other human activities. This analysis is done from the point of view of the current regulatory framework, outlining the most common types of waste in recent experiences, which will be supplemented by analysis of experiences in more detail in other articles in this issue, and finally, evaluating, for a particular case, the advantages from the point of view of sustainability, involves the use of wastes. The use of waste is viable today, in any element of the road: earthworks, pavements, structures, signs. In this article, the author will focus on applications in earthworks and pavements.

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