El impacto de los mantenimientos preventivos en los sistemas fotovoltaicos interconectados a la red de distribución eléctrica

Kassandra Elizabeth López Esparza Raúl Pérez Bustamante GUILLERMO RAUL GARCIA FERRERA (2023, [Artículo])

La obligación de llevar un sistema o equipo a su máximo rendimiento y operación, así como la resolución de posibles fallas en el mismo, ha dado lugar a la necesidad de desarrollar un ámbito especializado dedicado exclusivamente a abordar estas obligaciones. De esto surge el campo del mantenimiento, cuyo propósito fundamental es asegurar el funcionamiento adecuado de los equipos o instalaciones en los cuales se lleva a cabo dicho trabajo, así como corregir y prevenir fallas o problemas en los sistemas en cuestión. El mantenimiento puede aplicarse en una amplia gama de sectores donde se necesite prevenir o corregir alguna operación, y en el caso del sector energético renovable esto no es una excepción. En particular, el mantenimiento de los sistemas fotovoltaicos interconectadas a la red (SFIR) busca llevar la instalación a su mejor zona de operación y funcionamiento para con esto asegurar la generación de energía. Es por esta razón, que el sector energético se ha unido al desarrollo de una rama que se dedique a la operación y mantenimiento (O&M) de los sistemas fotovoltaicos. En este artículo se exponen los resultados de un estudio de mantenimiento preventivo en una instalación fotovoltaica ubicada en el estado de Aguascalientes, el cual fue realizado por Sunna Power, una empresa dedicada a ofrecer servicios de mantenimiento a SFIR en México. El trabajo explorará el estado de la instalación previo al mantenimiento y su situación una vez que éste ha sido ejecutado. Aun cuando los SFIR requieren poco mantenimiento, este articulo pretende demostrar que a pesar de esto la implementación de un plan de mantenimiento en las instalaciones puede generar un impacto positivo en la producción de energía del sistema, mostrando los resultados obtenidos en el mantenimiento ejecutado en la instalación fotovoltaica.

The obligation to ensure that a system or piece of equipment achieves its maximum performance and functionality, and to correct any failures that may occur, has led to the need to develop a specialized field dedicated exclusively to meeting these obligations. This has given rise to the field of maintenance, the basic aim of which is to ensure the correct functioning of the equipment or installations on which the work is carried out, and to correct and prevent any failures or problems in the systems concerned; maintenance can be applied in a wide range of sectors where it is necessary to prevent or correct an operation, and the renewable energy sector is no exception. In particular, the maintenance of photovoltaic systems connected to the grid (SFIR) aims to bring the installation to its best operational and functional range in order to guarantee energy production; it is for this reason that the energy sector has participated in the development of a branch dedicated to the operation and maintenance (O&M) of photovoltaic systems. This article presents the results of a preventive maintenance study in a photovoltaic plant located in the state of Aguascalientes, carried out by Sunna Power, a company dedicated to providing maintenance services to SFIR in Mexico. The study examines the condition of the installation before maintenance and the situation after maintenance. Although SFIR requires little maintenance, this article aims to demonstrate that the implementation of a maintenance plan in the plants can nevertheless have a positive impact on the energy production of the system, displaying the results obtained in the maintenance carried out on the photovoltaic installation.

Mantenimiento preventivo Módulo fotovoltaico Plan de mantenimiento Sistema fotovoltaico Preventive maintenance Maintenance plan Photovoltaic system INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS OTRAS ESPECIALIDADES TECNOLÓGICAS OTRAS OTRAS

Fungal pathogens associated with crown and root rot in wheat-growing areas of Northern Kyrgyzstan

Göksel ÖZER SENOL YILDIZ MUSTAFA IMREN Abdelfattah DABABAT (2023, [Artículo])

Wheat Diseases Crown and Root Rot CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA TRITICUM WHEAT DISEASES ROOT ROTS PATHOGENICITY

MLN disease diagnostics, surveillance, MLN disease-free seed production, and MLN disease management

Suresh L.M. (2022, [Objeto de congreso])

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA DISEASES DISEASE MANAGEMENT SEED PRODUCTION MAIZE NECROSIS YIELD LOSSES ECONOMIC IMPACT SURVEILLANCE SYSTEMS TRAINING

Influence of poverty concerns on demand for healthier processed foods: A field experiment in Mexico City

Marrit Van den Berg Jason Donovan (2023, [Artículo])

Living in poverty can present cognitive biases that exacerbate constraints to achieving healthier diets. Better diets could imply food choice upgrades within certain food categories, such as electing processed foods with an improved nutritional profile. This study evaluated the influence of monetary and health concerns on the willingness to pay (WTP) for healthier processed foods in a low-income section of Mexico City. We employed priming techniques from the scarcity literature, which are applied for the first time to healthier food purchasing behaviours in low-income settings. Our predictions are based on a dual system framework, with choices resulting from the interaction of deliberative and affective aspects. The WTP was elicited through a BDM mechanism with 423 participants. Results showed that induced poverty concerns reduced the valuations of one of the study's healthier food varieties by 0.17 standard deviations. The latter effect did not differ by income level. The WTP for a healthier bread product but one with relatively high sugar and fat content was reduced by induced poverty concerns only among certain consumers without bread purchasing restrictions (78% of the sample). Potential mechanisms were assessed through regression analysis and structural equation modelling. The relationship between poverty concerns and WTP was mediated by increased levels of stress. While we could not rule out impact on cognitive load, it was not deemed a mediator in this study. Our findings signal that improvements in economic and psychological well-being among low-income consumers may aid to increase their demand for healthier processed foods.

Healthier Diets Poverty Psychology Dual System Model CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA DIET POVERTY PSYCHOLOGY STRESS WILLINGNESS TO PAY

MLN disease diagnostics, MLN disease-free seed production and MLN disease management

Suresh L.M. (2022, [Objeto de congreso])

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA DISEASES DISEASE MANAGEMENT SEED PRODUCTION MAIZE NECROSIS YIELD LOSSES ECONOMIC IMPACT SURVEILLANCE SYSTEMS TRAINING

Mining alleles for tar spot complex resistance from CIMMYT's maize Germplasm Bank

Martha Willcox Juan Burgueño Daniel Jeffers Zakaria Kehel Rosemary Shrestha Kelly Swarts Edward Buckler Sarah Hearne Charles Chen (2022, [Artículo])

Maize Landraces Maize Genetic Resources Allelic Diversity Rare Alleles Phenotypic Characterization Tropical Maize Phyllachora maydis CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA MAIZE LANDRACES GENETIC RESOURCES ALLELES FOLIAR DISEASES CLIMATE CHANGE

Chapter 8. Wheat rusts: Current status, prospects of genetic control and integrated approaches to enhance resistance durability

sridhar bhavani Ravi Singh David Hodson JULIO HUERTA_ESPINO Mandeep Randhawa (2022, [Capítulo de libro])

Rust Resistance Race Specific Genes Adult Plant Resistance Genes Breeding Technologies CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA RUSTS DISEASE RESISTANCE ADULT PLANT RESISTANCE BREEDING TECHNOLOGY

Gene editing to accelerate crop breeding

Kanwarpal Dhugga (2022, [Artículo])

Accelerated Breeding Grain Biofortification Maize Lethal Necrosis Rust Resistance Site-Directed Nuclease Scenarios CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA BREEDING BACKCROSSING DISEASE RESISTANCE GENE EDITING GRAIN BIOFORTIFICATION RUSTS

Tackling Maize Lethal Necrosis (MLN) in eastern Africa through effective phytosanitary approaches

Suresh L.M. Yoseph Beyene Dan Makumbi Manje Gowda Prasanna Boddupalli (2023, [Objeto de congreso])

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA MAIZE NECROSIS DISEASE MANAGEMENT PLANT HEALTH GENE EDITING GERMPLASM

Potential impact of prosthetic biomaterials on the periodontium: a comprehensive review.

NATIVIDAD CASTRO ALARCON Artak Heboyan Gustavo Fernandes Norma Samanta Romero Castro (2023, [Artículo])

The success of a prosthetic treatment is closely related to the periodontal health of the individual. The aim of this article was to review and present the importance of prosthetic restorative materials on the condition of the periodontium, the changes that occur in the composition of the subgingival microbiota and the levels of inflammatory markers in gingival crevicular fluid. Articles on the influence of different prosthetic restorative materials on subgingival microbiota and proinflammatory cytokines were searched for using the keywords ¿prosthetic biomaterials¿, ¿fixed prosthesis¿, ¿periodontal health¿, ¿subgingival microbiota¿, ¿periodontal biomarkers¿ and ¿gingival crevicular fluid¿ in PubMed/Medline, Science Direct, Scopus and Google Scholar. The type of material used for prosthesis fabrication together with poor marginal and internal fit can result in changes in the composition of the subgingival microbiota, as well as increased accumulation and retention of dentobacterial plaque, thus favoring the development of periodontal disease and prosthetic treatment failure. Biological markers have helped to understand the inflammatory response of different prosthetic materials on periodontal tissues with the main purpose of improving their clinical application

in patients who need them. Metal-free ceramic prostheses induce a lower inflammatory response regardless of the fabrication method; however, the use of CAD/CAM systems is recommended for their fabrication. In addition, it is presumed that metal-ceramic prostheses cause changes in the composition of the subgingival microbiota producing a more dysbiotic biofilm with a higher prevalence of periodontopathogenic bacteria, which may further favor periodontal deterioration.

prosthetic biomaterials fixed prosthesis periodontal health MEDICINA Y CIENCIAS DE LA SALUD CIENCIAS MÉDICAS SALUD PÚBLICA