Livestock valuation: an assessment model based on sow age

[EN] Food supply in Europe is based on the consumption of meat ¿ of which pork is the most consumed. The livestock sector represents some 40% of total agricultural production. Livestock farms need tools for business management and valuation in order to make business productivity estimates and determine compensation, as well as calculate average and marginal costs. Pig farmers need to determine the optimal time for culling a sow: meaning that for livestock depreciation it is necessary to determine the value of sows depending on their age. In this study, a model is shown for valuing a sow according to its productive life and net present value generated. In the same way as any asset in a production process, the economic value of a sow should be estimated by its contribution to the process of generating future profits. The distribution of costs depends on the size of the farm, and so three sizes of farms are considered: fewer than 250 hybrid sows; 251 to 500 sows; and more than 500 sows. The economic values of the sows were obtained according to their age and number of farrowing. The models show variations between differently sized farms.Guaita-Pradas, I.; Pérez-Salas Sagreras, JL.; Fenollosa Ribera, ML. (2017). Livestock valuation: an assessment model based on sow age. Ciência e Técnica Vitivinícola. 32(8):299-323. http://hdl.handle.net/10251/109828S29932332

Analyzing territory for the sustainable development of solar photovoltaic power using GIS databases

[EN] Solar energy generated by grid-connected photovoltaic (GCPV) systems is considered an important alternative electric energy source because of its clean energy production system, easy installation, and low operating and maintenance costs. This has led to it becoming more popular compared with other resources. However, finding optimal sites for the construction of solar farms is a complex task with many factors to be taken into account (environmental, social, legal and political, technical-economic, etc.), which classic site selection models do not address efficiently. There are few studies on the criteria that should be used when identifying sites for solar energy installations (large grid-connected photovoltaic systems which have more than 100 kWp of installed capacity). It is therefore essential to change the way site selection processes are approached and to seek new methodologies for location analysis. A geographic information system (GIS) is a tool which can provide an effective solution to this problem. Here, we combine legal, political, and environmental criteria, which include solar radiation intensity, local physical terrain, environment, and climate, as well as location criteria such as the distance from roads and the nearest power substations. Additionally, we use GIS data (time series of solar radiation, digital elevation models (DEM), land cover, and temperature) as further input parameters. Each individual site is assessed using a unique and cohesive approach to select the most appropriate locations for solar farm development in the Valencian Community, a Spanish region in the east of Spain.Guaita-Pradas, I.; Marqués Pérez, I.; Gallego Salguero, AC.; Segura García Del Río, B. (2019). Analyzing territory for the sustainable development of solar photovoltaic power using GIS databases. 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A study on the determination of the natural park’s sustainable tourism potential. Environmental Monitoring and Assesment, 190(3), 167.Chakraborty, S., Sadhu, P., & Pal, N. (2015). Technical mapping of solar PV for ISM -an approach toward green campus. Energy Science & Engineering, 3(3), 196–206. https://doi.org/10.1002/ese3.65.Chakraborty, S., Kumar, R., Haldkar, A. K., & Shishuranjan. (2017). Mathematical method to find best suited PV technology for different climatic zones of India. International Journal of Energy and Environmental Engineering, 8(2), 153–166.Chiabrando, R., Fabrizio, E., & Garnero, G. (2009). The territorial and landscape impacts of photovoltaic systems: definition of impacts and assessment of the glare risk. Renewable and Sustainable Energy Reviews, 13(9), 2441–2451.Fagbohun, B. J. (2018). Integrating GIS and multi-influencing factor technique for delineation of potential groundwater recharge zones in parts of Ilesha schist belt, southwestern Nigeria. Environmental Earth Sciences, 77, 69.Fung, T., & Wong, F. K. K. (2007). Ecotourism planning using multiple criteria evaluation with GIS. Geocarto International, 22(2), 87–105.Galacho-Jiménez, F. B., & Ocaña-Ocaña, C. (2006). Tratamiento con SIG y técnicas de evaluación multicriterio de la capacidad de acogida del territorio para usos urbanísticos: residenciales y comerciales. In Proceedings of the 12th National Congress on Geographic Information Systems (pp. 1509–1525), Granada, 19th-22nd September 2006.Gastli, A., & Charabi, Y. (2010). Siting of large PV Farms in Al-Batinah Region of Oman. In 2010 IEEE International Energy Conference Proceedings (pp. 548–552), Manama, 2010.Geneletti, D. (2013). Assessing the impact of alternative land-use zoning policies on future ecosystem services. Environmental Impact Assessment Review, 40, 25–35.Goleiji, E., Hosseini, S. M., Khorasani, N., & Monavari, S. M. (2017). Forest fire risk assessment-an integrated approach based on multicriteria evaluation. Environmental Monitoring and Assessment, 189, 612.Ismail, M., Abdel Ghaffar, M., & Azzam, M. (2012). GIS application to identify the potential for certain irrigated agriculture uses on some soils in Western Desert, Egypt. The Egyptian Journal of Remote Sensing and Space Sciences, 15, 39–51.Janke, J. R. (2010). Multicriteria GIS modeling of wind and solar farms in Colorado. Renewable Energy, 35(10), 2228–2234.Jo, J., & Otanicar, T. (2011). A hierarchical methodology for the mesoscale assessment of building integrated roof solar energy systems. Renewable Energy, 36(11), 2992–3000.Khodaparast, M., Rajabi, A., & Edalat, A. (2018). Municipal solid waste landfill siting by using GIS and analytical hierarchy process (AHP): a case study in Qom city, Iran. Environmental Earth Sciences, 77, 52.Law 10/2004 of December 9th, of the Valencian Community on protected undeveloped land. 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Energy Policy, 34(17), 3218–3232.Ocaña-Ocaña, C., & Galacho-Jiménez, F. B. (2002). Un modelo de aplicación de SIG y evaluación multicriterio al análisis de la capacidad del territorio en relación a funciones turísticas. In: Proceedings of the 4th National Congress on Tourism and Information and Communication Technologies (Turitec), Malaga, 2002.Red Eléctrica de España. (2018). Red Eléctrica de España (REE) corporate group website. Retrieved from https://www.ree.es/es/estadisticas-del-sistema-electrico/3015/all Accessed 15 June 2018.Reisi, M., Afzali, A., & Aye, L. (2018). Applications of analytical hierarchy process (AHP) and analytical network process (ANP) for industrial site selections in Isfahan, Iran. Environmental Earth Sciences, 77, 537.Sánchez-Lozano, J., García-Cascales, M., & Lamata, M. (2016). Comparative TOPSIS-ELECTRE TRI methods for optimal sites for photovoltaic solar farms. Case study in Spain. Journal of Cleaner Production, 127, 387–398.Simao, A., Densham, P. J., & Haklay, M. (2009). Web-based GIS for collaborative planning and public participation: an application to the strategic planning of wind farm sites. Journal of Environmental Management, 90, 2027–2040.Skoplaki, E., Boudouvis, A., & Palyvos, J. (2008). A simple correlation for the operating temperature of photovoltaic modules of arbitrary mounting. Solar Energy Materials & Solar Cells, 92, 1393–1402.Song, D., Jiao, H., & Te Fan, C. (2015). Overview of the photovoltaic technology status and perspective in China. Renewable and Sustainable Energy Reviews, 48, 848–856.Trappey, A. J., et al. (2016). The determinants of photovoltaic system costs: an evaluation using a hierarchical learning curve model. Journal of Cleaner Production, 112(2), 1709–1716.Wang, S., et al. (2016). Selecting photovoltaic generation sites in Tibet using remote sensing and geographic analysis. Solar Energy, 133, 85–93.Xin-gang, Z., Guan, W., & Yahui, Y. (2015). The turning point of solar photovoltaic industry in China: will it come? Renewable and Sustainable Energy Reviews, 41, 178–188.Yu, C., van Sark, W., & Alsema, E. (2011). Unraveling the photovoltaic technology learning curve by incorporation of input price changes and scale effects. Renewable and Sustainable Energy Reviews, 15(1), 324–337.Yushchenko, A., et al. (2018). GIS-based assessment of photovoltaic (PV) and concentrated solar power (CSP) generation potential in West Africa. Renewable and Sustainable Energy Reviews, 81(2), 2088–2103

An Analysis of the Cost of Water Supply Linked to the Tourism Industry. An Application to the Case of the Island of Ibiza in Spain

[EN] Tourist activity has a number of impacts on the destinations in which it takes place, among which are the environmental ones. A particular problem is the increase in water demand and wastewater production, which can compromise the balance of ecosystems. As many authors point out, there is a research gap in the comparative analysis between available water resources and the demand associated with tourism. In this respect, the main objective of this work is, on the one hand, to assess the water needs linked to the tourism industry and the capacity of natural resources to meet such a demand and, on the other hand, to estimate the economic cost of the water supply associated with the growing tourist demand in a territory, such as the island of Ibiza in Spain. It has been determined that the resources available are not sufficient to meet the water demand of the resident population at this destination, which is why it is necessary to resort to producing desalinated water. Therefore, the additional requirements associated with tourism must be met fully with desalinated water, which results in an increased cost of water management for the region. This paper also points at water losses in distribution networks and tourism seasonality as two phenomena that aggravate this issue.González-Pérez, DM.; Martín-Martín, JM.; Guaita Martínez, JM.; Sáez-Fernández, FJ. (2020). An Analysis of the Cost of Water Supply Linked to the Tourism Industry. An Application to the Case of the Island of Ibiza in Spain. Water. 12(7). https://doi.org/10.3390/w1207200612

An Analysis of the Cost of Water Supply Linked to the Tourism Industry. An Application to the Case of the Island of Ibiza in Spain

Tourist activity has a number of impacts on the destinations in which it takes place, among which are the environmental ones. A particular problem is the increase in water demand and wastewater production, which can compromise the balance of ecosystems. As many authors point out, there is a research gap in the comparative analysis between available water resources and the demand associated with tourism. In this respect, the main objective of this work is, on the one hand, to assess the water needs linked to the tourism industry and the capacity of natural resources to meet such a demand and, on the other hand, to estimate the economic cost of the water supply associated with the growing tourist demand in a territory, such as the island of Ibiza in Spain. It has been determined that the resources available are not sufficient to meet the water demand of the resident population at this destination, which is why it is necessary to resort to producing desalinated water. Therefore, the additional requirements associated with tourism must be met fully with desalinated water, which results in an increased cost of water management for the region. This paper also points at water losses in distribution networks and tourism seasonality as two phenomena that aggravate this issue

Analysis of longitudinal metabolomic data using multivariate curve resolution-alternating least squares and pathway analysis

Extraction of meaningful biological information from longitudinal metabolomic studies is a major challenge and typically involves multivariate analysis and dimensional reduction methods for data visualization such as Principal Component Analysis or Multivariate Curve Resolution-Alternating Least Squares (MCR-ALS). Besides, a variety of computational tools have been developed to identify changes in metabolic pathways including functional analysis and pathway analysis. In this work, the joint analysis of results from MCR-ALS and metabolic pathway analysis is proposed to facilitate the interpretation of dynamic changes in longitudinal metabolomic data. The strategy is based on the use of MCR-ALS to remove unstructured random variation in the raw data, thus facilitating the interpretation of dynamic changes observed by metabolic pathway analysis over time. A simulated data set representing dynamic longitudinal changes in the intensities of a subset of metabolites from three metabolic pathways was initially used to test the applicability of MCR-ALS to support pathway analysis for detecting pathway perturbations. Then, the strategy is applied to real data acquired for the analysis of changes during CD8+ T cell activation. Results obtained show that MCR-ALS facilitates the interpretation of longitudinal metabolomic profiles in multivariate data sets by identifying metabolic pathways associated with each detected dynamic component

Análisis comparativo de los modelos de la cadena de suministro: ABC, BSC Y SCOR

[EN] El estudio y análisis del desempeño de la cadena de suministro ha evolucionado, desde la década de los 80, integrándose en el enfoque estratégico de las organizaciones. Diferentes modelos, han sido desarrollados con el objeto de controlar el proceso de producción y/o comercialización, para introducir mejoras, y consecuentemente mejorar los resultados económicos empresariales. Entre estos modelos destacan: BSC (Balanced Scorecard), SCOR (Supply Chain Operations Reference) y ABC (Activity Based Costing). El objetivo de este artículo es revisar la literatura referente a estos modelos y su vinculación con la cadena de suministro y en particular con el sector florícola. Para ello, se ha realizado una revisión sistemática de artículos científicos, tesis de grado y maestría, actas de congresos e informes, redactados y publicados desde 1910 hasta 2020. Estos documentos fueron recopilados a partir de diferentes bases científicas: Web of science, Scopus, Google scolar, Emerald, Dialnet, etc. En total, se revisaron 52 artículos científicos, 21 tesis de grado y posgrado, 22 libros, 20 informes, 3 resúmenes de congresos y un artículo de revista académica. Como resultado se constata que no se han realizado investigaciones de ABC, BSC, SCOR relacionadas con la cadena de suministro específicamente para el sector florícola. Si bien recientemente se han desarrollado modelos como el SCOR y BLOCKCHAIN para cadenas de suministro agrícolas y alimenticias. Pudiéndose concluir que las características de estos modelos, los hacen interesantes para su aplicación a la cadena de suministro del sector florícola.Rodríguez Mañay, LO.; Guaita-Pradas, I.; Marqués Pérez, I. (2020). Análisis comparativo de los modelos de la cadena de suministro: ABC, BSC Y SCOR. Custos e @gronegócio online. 16(2):72-108. http://hdl.handle.net/10251/167454S7210816

Adaptación a la realidad docente como oportunidad para la adquisición de competencias en el desarrollo de las sesiones de prácticas de la asignatura de Empresa en Ingeniería del Diseño

[EN] The European Higher Education Area has introduced to a new organization of university education at different levels. With a changing in education orientation, from learning content, to an orientation based on learning and development competencies. The Design career is to train scientific and technical professionals to be able to direct and manage the entire life of a new product, from idea generation (marketing, basicdesign, ...) through production, manufacturing and product promoting, to the environmental impact assessment at the end of its useful life. The study and initial analysis of ideas, implementation of production processes and their placement on the market, give the Business Economics subject, highly complementary and very important for student technical training, received by this degree. The critical observation of the situation of Business Economics teaching, has led to propose a project of educational innovation that meets the needs of learning in entrepreneurship, solving the problems of teaching, while the transversal competences CT-4 are incorporated "innovation, creativity and entrepreneurship"and CT-6" Teamwork and leadership ". Considered fundamental in the performance of management. The competencies CT-03 "Analysis and Troubleshooting," and CT-12 "Planning and time management" fostering a better learning process.[ES] El proceso de construcción del Espacio Europeo de Educación Superior (EEES) ha supuesto una nueva organización de las enseñanzas universitarias en sus diferentes niveles, con un cambio en la orientación de la enseñanza, pasando de centrarnos en el aprendizaje de contenidos, a una orientación completamente diferente basada en resultados de aprendizaje y desarrollo de competencias. La carrera de diseño forma a profesionales en la vertiente científica y técnica para el desarrollo de nuevos diseños y productos desde la generación de las ideas, la producción, la fabricación y el posterior lanzamiento, incluido el estudio del impacto ambiental al final de su vida útil. La asignatura de Economía de la Empresa adquiere una condición muy relevante como complemento de la formación técnica que reciben los alumnos de este grado. La observación crítica de la situación de la docencia de empresa, ha llevado a platear un proyecto de innovación docente que dé respuesta a las necesidades de aprendizaje en emprendimiento, a la vez que atiende los problemas de docencia, y se incorporan las competencias transversales CT-4 “Innovación, creatividad y emprendimiento”, y CT-6 “Trabajo en equipo y liderazgo”. Consideradas como fundamentales en el desempeño de la gestión empresarial. También las competencias CT-03 “Análisis y resolución de problemas”, y CT-12 “Planificación y gestión del tiempo” que favorezcan un mejor proceso de aprendizaje.Marqués Pérez, I.; Fenollosa Ribera, ML.; Guaita Pradas, I. (2016). Adaptación a la realidad docente como oportunidad para la adquisición de competencias en el desarrollo de las sesiones de prácticas de la asignatura de Empresa en Ingeniería del Diseño. En In-Red 2016. II Congreso nacional de innovación educativa y docencia en red. Editorial Universitat Politècnica de València. https://doi.org/10.4995/INRED2016.2016.4290OC

Physical properties of Lyman-alpha emitters at z∼0.3z\sim 0.3 from UV-to-FIR measurements

The analysis of the physical properties of low-redshift Ly$\alpha$ emitters (LAEs) can provide clues in the study of their high-redshift analogues. At $z \sim 0.3$, LAEs are bright enough to be detected over almost the entire electromagnetic spectrum and it is possible to carry out a more precise and complete study than at higher redshifts. In this study, we examine the UV and IR emission, dust attenuation, SFR and morphology of a sample of 23 GALEX-discovered star-forming (SF) LAEs at $z \sim 0.3$ with direct UV (GALEX), optical (ACS) and FIR (PACS and MIPS) data. Using the same UV and IR limiting luminosities, we find that LAEs at $z\sim 0.3$ tend to be less dusty, have slightly higher total SFRs, have bluer UV continuum slopes, and are much smaller than other galaxies that do not exhibit Ly$\alpha$ emission in their spectrum (non-LAEs). These results suggest that at $z \sim 0.3$ Ly$\alpha$ photons tend to escape from small galaxies with low dust attenuation. Regarding their morphology, LAEs belong to Irr/merger classes, unlike non-LAEs. Size and morphology represent the most noticeable difference between LAEs and non-LAEs at $z \sim 0.3$. Furthermore, the comparison of our results with those obtained at higher redshifts indicates that either the Ly$\alpha$ technique picks up different kind of galaxies at different redshifts or that the physical properties of LAEs are evolving with redshift.Comment: Accepted for publication in Ap

Clustering and descendants of MUSYC galaxies at z<1.5

We measure the evolution of galaxy clustering out to a redshift of z~1.5 using data from two MUSYC fields, the Extended Hubble Deep Field South (EHDF-S) and the Extended Chandra Deep Field South (ECDF-S). We use photometric redshift information to calculate the projected-angular correlation function, omega(sigma), from which we infer the projected correlation function Xi(sigma). We demonstrate that this technique delivers accurate measurements of clustering even when large redshift measurement errors affect the data. To this aim we use two mock MUSYC fields extracted from a LambdaCDM simulation populated with GALFORM semi-analytic galaxies which allow us to assess the degree of accuracy of our estimates of Xi(sigma) and to identify and correct for systematic effects in our measurements. We study the evolution of clustering for volume limited subsamples of galaxies selected using their photometric redshifts and rest-frame r-band absolute magnitudes. We find that the real-space correlation length r_0 of bright galaxies, M_r<-21 (rest-frame) can be accurately recovered out to z~1.5, particularly for ECDF-S given its near-infrared photometric coverage. There is mild evidence for a luminosity dependent clustering in both fields at the low redshift samples (up to =0.57), where the correlation length is higher for brighter galaxies by up to 1Mpc/h between median rest-frame r-band absolute magnitudes of -18 to -21.5. As a result of the photometric redshift measurement, each galaxy is assigned a best-fit template; we restrict to E and E+20%Sbc types to construct subsamples of early type galaxies (ETGs). Our ETG samples show a strong increase in r_0 as the redshift increases, making it unlikely (95% level) that ETGs at median redshift z_med=1.15 are the direct progenitors of ETGs at z_med=0.37 with equivalent passively evolved luminosities. (ABRIDGED)Comment: 16 pages, 12 figures, 2 tables, accepted for publication in MNRA

PACS-Herschel FIR detections of Lyman-alpha emitters at 2.0<z<3.5

In this work we analyze the physical properties of a sample of 56 spectroscopically selected star-forming (SF) Ly$\alpha$ emitting galaxies at 2.0$\lesssim$z$\lesssim$3.5 using both a spectral energy distribution (SED) fitting procedure from rest-frame UV to mid-IR and direct 160$\mu$m observations taken with the Photodetector Array Camera & Spectrometer (PACS) instrument onboard \emph{Herschel Space Observatory}. We define LAEs as those Ly$\alpha$ emitting galaxies whose rest-frame Ly$\alpha$ equivalent widths (Ly$\alpha$ EW$_{rest-frame}$) are above 20\AA, the typical threshold in narrow-band searches. Ly$\alpha$ emitting galaxies with Ly$\alpha$ EW$_{rest-frame}$ are called non-LAEs. As a result of an individual SED fitting for each object, we find that the studied sample of LAEs contains galaxies with ages mostly below 100Myr and a wide variety of dust attenuations, SFRs, and stellar masses. The heterogeneity in the physical properties is also seen in the morphology, ranging from bulge-like galaxies to highly clumpy systems. In this way, we find that LAEs at 2.0$\lesssim$z$\lesssim$3.5 are very diverse, and do not have a bimodal nature, as suggested in previous works. Furthermore, the main difference between LAEs and non-LAEs is their dust attenuation, because LAEs are not as dusty as non-LAEs. On the FIR side, four galaxies of the sample (two LAEs and two non-LAEs) have PACS-FIR counterparts. Their total IR luminosity place all of them in the ULIRG regime and are all dusty objects, with A$_{1200}$$\gtrsim$4mag. This is an indication from direct FIR measurements that dust and Ly$\alpha$ emission are not mutually exclusive. This population of red and dusty LAEs is not seen at z$\sim$0.3, suggesting an evolution with redshift of the IR nature of galaxies selected via their Ly$\alpha$ emission.Comment: Accepted for publication in A&