San Cristóbal’s research while affiliated with University of Cantabria and other places

What is this page?


This page lists works of an author who doesn't have a ResearchGate profile or hasn't added the works to their profile yet. It is automatically generated from public (personal) data to further our legitimate goal of comprehensive and accurate scientific recordkeeping. If you are this author and want this page removed, please let us know.

Publications (44)


Contractor selection for Project execution using multi-attribute decision making
  • Article

January 2023

·

6 Reads

·

4 Citations

Procedia Computer Science

San Cristóbal

·

J.R. Fernández

·

V Dominguez

·

[...]

·

R Alvangonzález

Resultados obtenidos en la prueba MIR según baremo académico. Convocatorias de 2019 y 2020
  • Article
  • Full-text available

July 2022

·

803 Reads

·

1 Citation

Investigación en Educación Médica

Resumen Introducción: El examen de acceso a la especialización médica en España, conocido como prueba MIR, se convoca anualmente desde 1978 y se realiza simultáneamente en diversas sedes distribuidas por toda España. El acceso a las distintas especialidades médicas está condicionado por el baremo académico o puntaje conseguido en el grado de Medicina, entendiendo como tal el promedio de las calificaciones obtenidas durante la carrera en medicina, así como por el resultado de dicha prueba. Objetivo: El objetivo del presente trabajo fue el análisis los resultados de los médicos presentados a las pruebas MIR de 2019 y 2020, en función de su puntaje. Método: Para este estudio se hizo uso de la información publicada por el Ministerio de Sanidad relativa a los resultados definitivos de las convocatorias de la prueba MIR de 2019 y 2020. Dicha información incluye la nota media del baremo académico o puntaje de todos los médicos que realizaron el examen, así como el número de orden obtenido en la prueba. Resultados: Aunque la nota media del expediente de los opositores tiene un peso únicamente del 10% sobre la puntuación que da lugar a su ordenación en la prueba MIR, existe una correlación importante entre el puntaje y el número de orden obtenido que permite escoger entre las diferentes plazas de formación sanitaria especializada ofertadas en la convocatoria. Conclusiones: En la mayor parte de los casos, los individuos que obtuvieron una mejor nota media en el grado de Medicina son los que obtienen los mejores resultados en la prueba MIR. Esto se debe a un mayor nivel de conocimientos de partida al inicio de la preparación de la prueba, junto con un mejor aprovechamiento de dicho tiempo de preparación, ligado a su capacidad y hábito de trabajo, entrenados previamente a lo largo de los seis cursos del grado.

Download

Symptoms of major depression in the CorCOVID Latam sample.
Bivariate association of demographic, behavior and health status variables with major depressive symptoms
Multivariate association of demographic, behavior and health status variables with
CorCOVID Latam Psy study Journal Pre-proof Psychological impact of the pandemic on ambulatory cardiometabolic patients without evidence of SARS-CoV-2 infection. The CorCOVID Latam Psy Study Psychological impact of the pandemic on ambulatory cardiometabolic patients without evidence of SARS-CoV-2 infection. The CorCOVID Latam Psy Study

November 2020

·

237 Reads

·

13 Citations

Current Cardiology Reviews

Background The COVID-19 pandemic's mental health consequences remain unknown. Aim to assess the mental health status of ambulatory cardiometabolic patients during COVID-19 pandemic lockdown in Spanish speaking Latin American countries. Methods Cardiometabolic patients without COVID-19 evidence in 13 Latin American countries answered a survey between June 15th and July 15th, 2020. The Diagnosis Manual of Mental Disorders fifth edition was used to identify the presence of major depressive symptoms. Results The sample included 4,216 patients, 1,590 (37•71%; IC95% 36•24-39•19) were considered suffering major depression. Female gender, consuming ≥ 5 medications day, physical activity < 100 minutes weekly, low fruits and vegetables intake, poor treatment adherence, reduced food consumption were independently associated to the presence of major depressive symptoms. Conclusions The CorCOVID Latam Psy study showed that one third of the Latin American Spanish speaking population is suffering from major depressive symptoms during the COVID-19 outbreak.


ANT AND SPIDER INTERACTIONS IN COFFEE AGROECOSYSTEMS: PATTERNS AND MECHANISMS

October 2015

·

23 Reads

Both abiotic and biotic factors affect the abundance and distribution of organisms and therefore impact ecosystems and agroecosystems. Indeed, some organisms have strong effects on the distribution of others because they act as keystone species and/or ecosystem engineers whose effects cascade to other trophic levels. Ants can affect the distribution and abundance of a variety of taxonomic groups. In coffee agroecosystems from Southern Mexico Azteca sericeasur ants actively patrol the tree where their nest is built and the nearby coffee plants influencing the ant community and biological control. Here we report the relationship that A.sericeasur has with spiders, an abundant predatory group found in coffee farms. We present evidence of the relationships between A. sericeasur and spider communities found at the coffee layer and at the tree trunk layer; and we suggest potential mechanisms driving the observed patterns. During the summers of 2008 and 2009 we sampled spiders in the coffee layer and we found that spiders per coffee bush were richer and more abundant in the presence of A. sericeasur that in its absence. Indeed, in the presence of these ants, spider richness increased by 27% whereas spider abundance increased by 67 %. Although, spider richness and abundance per coffee plant increased in the presence of A. sericeasur, spider species composition did not change between plants with and without the ants. In addition, we found that insect abundance per coffee plant increased in the presence of the ants. Based on this evidence we propose resource availability and enemy free space as driving mechanisms In regard to the spider community found at the trunk of shade trees in 2011 and 2012 we found that A. sericeasur was positively correlated with spider abundance and biomass. Indeed, spider abundance increased by 57.5% in the presence of the ants whereas spider biomass was also strongly correlated with their presence. However, we also identified that excluding the two most abundant spiders (Ischnothele digitata and Azilia guatemalensis), strongly changed the observed patterns. Fieldwork observations supported that both I. digitata and A. guatemalensis are predators of A. sericeasur. Likewise the coffee layer, spider species composition in the tree trunk layer was not strongly affected by the presence of the ant. Finally, we report the association between Falconina sp and A. sericeasur; a swift spider that travels in and out of A. sericeasur nests. Our data suggest that Falconina is a scavenger that takes advantage of dead A. sericeasur individuals. Overall we show that through resource availability, enemy free space and predation, A. sericeasur ants positively drive spider communities found at the coffee and at the tree trunk layers of coffee agroecosystems. (CONACYT, University of Michigan-Rackham School and School of Natural Resources and Environment, COCYTECH and NSF-DEB-1262086 granted to S. Philpott).


The use of Game Theory to solve conflicts in the project management and construction industry

January 2015

·

785 Reads

·

43 Citations

International Journal of Information Systems and Project Management

A typical construction project involves a wide range of disparate professionals, in many cases geographically distributed, working together for a relatively short period of time on the design and construction of a facility. Since organizations are becoming flatter, culturally rich, geographically diverse and intensely competitive, the possibilities for conflict in such environments are greater. Negotiation is an important aspect of a project and plays an important role in resolving claims, preventing disputes, and keeping a harmonious relationship between project participants. Part of any project manager's role as a leader is to recognize conflict, understand the sources of conflict and manage it, and to do this a project manager must be able to understand the basics of negotiation theory and have sufficient competencies to lead in such situations. To address the complex technical and human issues in negotiation, different negotiation theories and models are available which mainly include game theory, economic theory, and behavior theory. Since Game Theory provides, by its very nature, the appropriate tools for the analysis and eventual solution of conflicts of any kind, this paper uses a model based on Game Theory in order to identify the activities that are responsible for the delays in a project and divide the costs among them.


Des approches multi-omiques pour caractériser la fin du développement foetal et mieux comprendre le déterminisme de la maturité à la naissance en lien avec la survie néonatale.

February 2014

·

8 Reads

Selection for high prolificacy and lean growth rate in swine has been associated with a substantial increase in piglet mortality. The first 24‐48 hours after birth represent a critical period for survival. A major determinant for early survival is piglet maturity at birth which relies greatly on the process of tissue maturation during the last month of gestation. The objective of this study was to compare the progenies from Large White (LW) and Meishan (MS) breeds which differ for piglet survival and neonatal mortality. This project proposes multi‐disciplinary and multi‐omic approaches to identify the molecular and genetic basis related to maturity and perinatal survival. The metabolome was analyzed on plasma, urine, and amniotic liquid on 612 fetuses: it displayed higher heterogeneity at the end of gestation. The transcriptome of adrenal glands, muscle, liver, subcutaneous adipose tissue, and small intestine and the proteome of muscle and adipose subcutaneous tissue were analyzed on 64 fetuses. The first analyses identified the biological processes involved in development and maturity, and key genes that may explain the differences observed between LW and MS.






Citations (5)


... An examination of such approaches shows that there are two types of approaches in addressing this problem from different perspectives, including the subjective method and the objective method [7]. The subjective method focuses on evaluating and selecting appropriate contractors through adequately considering the subjectivity and fuzziness of the human decision-making process [8,9]. The objective method concentrates on exploring the interactivity between different criteria in evaluating and selecting the most appropriate contractor in a given situation [10]. ...

Reference:

A DEA Game Cross-Efficiency Model with Loss Aversion for Contractor Selection
Contractor selection for Project execution using multi-attribute decision making
  • Citing Article
  • January 2023

Procedia Computer Science

... Este trabajo da continuidad al realizado para las convocatorias de 2019 y 2020 [20]. Al igual que se hizo en dicho trabajo, este análisis de los resultados se ha centrado en el estudio de los médicos que obtienen un número de orden entre los 10 y 100 primeros, así como agrupados de 1.000 en 1.000 entre el número de orden 1.000 y el 5.000. ...

Resultados obtenidos en la prueba MIR según baremo académico. Convocatorias de 2019 y 2020

Investigación en Educación Médica

... Since the COVID-19 outbreak, hospitalizations for all patients have decreased, except for acute disease recovery, while hospitalizations for chronic diseases have remained low, suggesting the need for appropriate interventions for patients with unmanaged chronic diseases [11]. A lack of access to treatment and delayed treatment due to concerns about infection are associated with increased anxiety and depression in patients with chronic diseases, such as oncological patients [12] and cardiovascular patients [13]. ...

CorCOVID Latam Psy study Journal Pre-proof Psychological impact of the pandemic on ambulatory cardiometabolic patients without evidence of SARS-CoV-2 infection. The CorCOVID Latam Psy Study Psychological impact of the pandemic on ambulatory cardiometabolic patients without evidence of SARS-CoV-2 infection. The CorCOVID Latam Psy Study

Current Cardiology Reviews

... 13 A partir de la década de 1980, las autopistas organizan la localización de emprendimientos inmobiliarios pero también la de edificios inteligentes, centros de consumo e industrias. Esto se observa en el tercer cordón y especialmente en el eje norte, pero también dentro del segundo cordón en todos los ejes, dando un crecimiento de tipo lineal o tentacular semejante al habido durante la conurbación estructurada por los ejes de transporte público, en particular por la red ferroviaria de superficie (Ciccolella, 1999;Blanco, 2012, Gutiérrez, 2008. ...

Reestructuración de la red de autopistas y metropolización en Buenos Aires

... It is, therefore, evident that the applications of Game Theory and Negotiation Theory to construction management have increased in recent decades [51]. Specifically, a Game Theory study was applied to explain the influence of the degree of reliability of the planned work schedule on the behavior of subcontractors and project managers under a traditional contracting scheme of unit prices [52]. ...

The use of Game Theory to solve conflicts in the project management and construction industry
  • Citing Article
  • January 2015

International Journal of Information Systems and Project Management