Pastor Gimeno, José Ismael
Loading...
Organizational Units
Organizational Unit
Organizational Unit
Job Title
ORCID
Panorama page
person.page.panorama
Name
Email Address
6 results
Search Results
Now showing 1 - 6 of 6
- PublicationLa doble evaluación: un medio para aprender de los errores y para mejorar el rendimiento en matemáticas(Editorial Universitat Politècnica de València, 2018-09-26) Boigues Planes, Francisco José; Estruch Fuster, Vicente Domingo; Vidal Meló, Anna; Pastor Gimeno, José Ismael; Departamento de Matemática Aplicada; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras[EN] This paper presents an educational innovation in the field of mathematics consisting of implementing a "double assessment" system (DDE). Any assessment in teaching should not only measure the acquisition of knowledge in the broadest sense, but also should help overcome the obstacles and difficulties experienced during learning. In the double evaluation, students face a first test of control and, within a few days, they face another test with the same learning objectives. In the time interval between the two tests, in class, those contents are worked especially where greater learning deficiencies have been observed. The experience has been carried out during the first semester of the 2017/2018 academic year and 61 first-degree students from the Degree in Environmental Sciences of the Polytechnic University of Valencia participated. The results of the experience show significant improvements in the performance of the students and in addition there is a greater implication of the students in their own learning.
- PublicationRedes bayesianas y diagnóstico médico. Una forma diferente de aprender probabilidades condicionadas(Universitat Politècnica de València, 2019-07-31) Estruch Fuster, Vicente Domingo; Boigues Planes, Francisco José; Vidal Meló, Anna; Pastor Gimeno, José Ismael; Departamento de Matemática Aplicada; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras[ES] Las redes bayesianas constituyen una herramienta formal que permite modelar procesos caracterizados por la incertidumbre, lo cual es propio de muchos problemas reales. Con una red bayesiana se puede establecer un modelo completo sobre un conjunto de variables aleatorias y sus relaciones. Dicho modelo se puede utilizar para estimar probabilidades de ciertas variables de la red, que se denominan variables de estado, cuando son fijadas otras variables, llamadas variables de evidencia. El proceso de obtener la distribución de probabilidad de las variables de estado dadas las evidencias se denomina inferencia probabilística bayesiana. En este trabajo, tras introducir las redes bayesianas, se expone cómo utilizarlas en el aula analizando problemas de diagnóstico médico. Con esto se persigue un aprendizaje más significativo de los conceptos de independencia y de probabilidad condicional, que son esenciales para una correcta aplicación de numerosos métodos probabilísticos y estadísticos.
- PublicationEvaluating dolphin damage in trammel net fisheries in the Valencia region: Insights to improve management(Elsevier BV, 2023-12-10) Feliu-Tena, Blanca; Rodilla Alamá, Miguel; Pastor Gimeno, José Ismael; Abalo-Morla, Sara; Bou-Cabo, M.; Belda Pérez, Eduardo Jorge; Departamento de Ingeniería Hidráulica y Medio Ambiente; Departamento de Ciencia Animal; Departamento de Matemática Aplicada; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras[EN] Interactions between dolphins and trammel net fisheries have been described in the Mediterranean Sea as having negative consequences for both cetaceans and fishers. There is a need for studies that evaluate the economic costs caused by dolphins feeding from entangled fishes in trammel nets since most cetacean species involved in these interactions are endangered. This study aims to evaluate the economic impact of the interaction between dolphins and trammel nets fisheries in the coastal waters of the Valencian region in the western Mediterranean Sea. We conducted at-port visual inspections of nets from April 2018 to March 2019, which included 1,849 fishing operations with trammel nets, and we recorded damages to the net and catch and the value of the fishery. Thirty-two interactions were detected during the year of the study. The only observed species interacting was the common bottlenose dolphin. No bycatch of dolphins was reported. The interactions have been impacted seasonally and most of them took place in February and March. There were no significant differences in catch when comparing sets with and without depredation or damage in nets due to depredation by dolphins. Also on average, no differences were found in the value of the catch when comparing sets with or without damage caused by dolphins. The main cost to the fisher was the cost of repairing the nets. The estimated financial loss per vessel and year was €556 (95%CI: €303¿€809). This represents less than 1% of the total yearly income of each vessel in our area. We suggest implementing tools to economically compensate artisanal vessels for any damage caused by dolphins in order to avoid increasing the hostile feeling of fishers towards dolphins and to apply conservation measures to protect this cetacean species.
- PublicationValoración de indicadores para la CT-03 Análisis y resolución de problemas(Editorial Universitat Politècnica de València, 2021-09-28) Vidal Meló, Anna; Boigues Planes, Francisco José; Pastor Gimeno, José Ismael; Departamento de Matemática Aplicada; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; Universitat Politècnica de València[EN] The conclusions of some work groups suggest the qualification of the transversal competence CT- 03 Analysis and resolution of problems, without proportional formulas to the final grade of the subject. Instead, the use of rubrics for the evaluation of the proposed training activities is recommended. In this work, the use of a rubric generated by a group of experts is proposed, in which UPV indicators typical of the aforementioned competence are established together with some UPV indicators of the competence CT-08 Effective communication, since in problem solving it is intended that students solve them correctly, in a structured, clear and rigorous way, and using the scientific language properly. The objective of this work is focused on the initial validation of each of the indicators set by the group of experts, establishing an ideal, as well as on the assessment by the students, comparing such gradings. Finally, we propose using a fuzzy coefficient of adaptation to the ideal, which allows to measure the closeness to the ideal of the perception that the students have of the fulfillment of the established criteria and, in the future, evaluating the acquisition of the aforementioned competence in the students.
- PublicationThe Artisanal Fishing Sector in the Spanish Mediterranean: A Sector with a Long History and an Uncertain Future(MDPI AG, 2022-10-31) Marquez Escamilla, Andrea; Herrera Racionero, Paloma; Pastor Gimeno, José Ismael; Miret Pastor, Luis Gaspar; Departamento de Matemática Aplicada; Departamento de Economía y Ciencias Sociales; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; GENERALITAT VALENCIANA; AGENCIA ESTATAL DE INVESTIGACION[EN] The fishing sector is facing major economic and environmental challenges worldwide. However, at least in developed countries, it is also undergoing a major social crisis. This research has tried to quantify and validate this subjective feeling of deep crisis, based on objective and quantitative data referring to the Spanish Mediterranean. Indeed, the results show alarming data. Different scattered databases have been analyzed and it has been exposed that in only 15 years the number of vessels, power and tonnage has decreased by about 40%; as for fishermen, their number has decreased by about 30%, also revealing a serious problem of generational replacement, since in only 10 years, the average age of fishermen has increased by 3 years. A simple linear regression model shows that this downward trend in the number of boats and fishermen will continue at least in the short term. The data obtained invite a deep reflection on the future or even the very survival of fishing in the Spanish Mediterranean in the medium term. This reflection is not limited to this specific area but can be extrapolated to many other fishing areas.
- PublicationEstimation of Bluefin Tuna (Thunnus thynnus) mean length in sea cages by acoustical means(Elsevier, 2022-08) Puig Pons, Vicente; Muñoz Benavent, Pau; Pérez Arjona, Isabel; Ladino-Velásquez, Anderson; Llorens-Escrich, Susana; Andreu García, Gabriela; Valiente González, José Miguel; Atienza Vanacloig, Vicente Luis; Ordoñez-Cebrian, Patricia; Pastor Gimeno, José Ismael; Espinosa Roselló, Víctor; Departamento de Física Aplicada; Departamento de Informática de Sistemas y Computadores; Departamento de Ingeniería de Sistemas y Automática; Departamento de Matemática Aplicada; Escuela Técnica Superior de Ingeniería Aeroespacial y Diseño Industrial; Instituto Universitario de Automática e Informática Industrial; Escuela Politécnica Superior de Alcoy; Escuela Politécnica Superior de Gandia; Instituto de Investigación para la Gestión Integrada de Zonas Costeras; Escuela Técnica Superior de Ingeniería Informática; MINISTERIO DE ECONOMIA Y EMPRESA; European Regional Development Fund; Universitat Politècnica de València[EN] This paper proposes an indirect method to estimate Bluefin Tuna (Thunnus thynnus) biomass in cages using acoustic techniques. Two Simrad EK60 echosounders working at 120 and 200 kHz and a stereo camera were used to obtain target strength (TS) to fork length (FL) relationships for both operating frequencies. The equipment was placed at the bottom of a floating cage, facing towards the surface to record the ventral aspect of fish. The acoustic and optical recordings were automatically analysed and the combination of acoustic and optical results provided unequivocal TS-FL assignments. Good relationships between TS and FL were obtained for both frequencies even without discriminating data from different fish tilts and without using beam directivity compensation. Stronger correlations were obtained for compensated TS at 200 kHz when reduced tuna swimming tilt was considered. TS measurements were compared to MFS numerical predictions for a Bluefin swimbladder model, with the simulation results showing good agreement with experimental measurements. The results allow the mean tuna length to be predicted in growing or fattening cages from acoustic data raising the possibility of improving production management and of providing a useful tool for catch control estimations made by international organisations (like ICCAT) and government bodies. (c) 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).