Claudia B. Jalina García, Eda R. Blanco Guerrero, Eddy F. López Pavón
{"title":"Análisis del impacto del huracán Eta sobre la infraestructura social de la Región Autónoma de la Costa Caribe Norte de Nicaragua (RACCN)","authors":"Claudia B. Jalina García, Eda R. Blanco Guerrero, Eddy F. López Pavón","doi":"10.5377/nexo.v35i04.15527","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15527","url":null,"abstract":"En esta investigación se presentan los resultados del proceso de análisis del impacto del huracán Eta en el período del 1-5 de noviembre del 2020 sobre la infraestructura social de la Región Autónoma de la Costa Caribe Norte de Nicaragua (RACCN). Dicha investigación incluyó en primera instancia el estudio de las condiciones atmosféricas que generaron el desarrollo, trayectoria y comportamiento del huracán Eta en territorio nicaragüense; y en segunda instancia, se determinó el impacto del huracán en los municipios de la RACCN, mediante la adaptación y aplicación de la metodología denominada Sistema de Gestión del Riesgo (SIGER). Los resultados del análisis indican que los municipios que sufrieron un mayor impacto ocasionado por la entrada del huracán Eta al territorio nicaragüense, fueron Puerto Cabezas y Prinzapolka, los cuales sufrieron las consecuencias devastadoras causadas por los fuertes vientos sostenidos de 230 km/h y la precipitación presente en la zona, dejando como consecuencia importantes pérdidas económicas y sociales.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115967088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Ryzhenkov, A. Volkov, S. Cherepanov, A. Druzhinin, M. Dasaev, S. Grigoriev
{"title":"Influence of macro-roughness on the leading edge of the plate on hydrodynamic losses","authors":"A. Ryzhenkov, A. Volkov, S. Cherepanov, A. Druzhinin, M. Dasaev, S. Grigoriev","doi":"10.5377/nexo.v35i04.15534","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15534","url":null,"abstract":"The paper presents research into the effects of macro-roughness on the leading edge of the plate imitating excrescences on the fins of humpback whales on the value of hydrodynamic losses. The authors compare calculations with experimental results obtained on a hydrodynamic flume. All studies are performed using the Ansys CFX and Autodesk CFD computer simulation packages. Based on the obtained findings, the authors make conclusions on the feasibility of applying macro-roughening on the leading edge of the plate. The conducted computational and experimental research demonstrates the positive effects of a certain configuration of spherical macro-roughness on the hydrodynamic characteristics of the plate in the case of spillage in an open-type hydrodynamic flume.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"207 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132282743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Elemental solution of the ultrahyperbolic equation iterated m times","authors":"M. Aguirre, E. Aguirre","doi":"10.5377/nexo.v35i04.15523","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15523","url":null,"abstract":"Equations not available","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133181420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
William A. Barrios Bell, Carola de Jesús Rodríguez Espinoza, Janieska M. Vega Ruíz, D. S. Salazar Centeno
{"title":"Consecuencias agroambientales y socioeconómicas ante el niño muy fuerte: alternativas de adaptación y mitigación de familias agricultoras de maíz (zea mays l.) de decano en Ciudad Darío","authors":"William A. Barrios Bell, Carola de Jesús Rodríguez Espinoza, Janieska M. Vega Ruíz, D. S. Salazar Centeno","doi":"10.5377/nexo.v35i04.15528","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15528","url":null,"abstract":"El Niño muy fuerte afecta drásticamente a las familias campesinas que cultivan maíz. Esta investigación se enfoca en una estimación de las consecuencias agroambientales y socioeconómicas de la producción de maíz durante El Niño muy fuerte que contribuya a proponer tecnologías y prácticas agroecológicas para el rediseño de agroecosistemas del municipio de Ciudad Darío. Se determinó el efecto de las necesidades hídricas sobre las fases fenológicas de la variedad de maíz NB-S, en la época de primera (1982, 1983 y 1997) y postrera (1982 y 1997). Se realizó un análisis documental para la valoración de las consecuencias agroambientales y socioeconómicas, y para proponer tecnologías y prácticas agroecológicas. El déficit hídrico provocado por la sequía de El Niño muy fuerte en 1982-1983 y 1997-1998 afectó el rendimiento y la producción de maíz, que implica más empobrecimiento, inseguridad alimentaria, deterioro de la salud, la reducción de la disponibilidad de agua de pozo durante el periodo seco, la degradación de los suelos, afectaciones a la calidad del paisaje y la biodiversidad de los agroecosistemas Se proponen 37 tecnologías y prácticas agroecológicas para transformar paulatinamente los agroecosistemas de Ciudad Darío, en los que se cultiva maíz de secano.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125432145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Studying and investigating the impact of marketing mix factors on e-purchase via smart phones (case study: Digikala corporation)","authors":"Hamed Bozorgkhou, Mohammad Alimohammadi Rokni","doi":"10.5377/nexo.v35i04.15540","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15540","url":null,"abstract":"In today's world, electronic shopping through various hardware has been developed to a great extent. Cellphones can help in to provide knowledge, course contents, interact with others and remote purchase. One of the necessities that plays an important role in today's chaotic environment is the concept of e-commerce. Despite the newness of this concept, e-commerce has made tremendous progress and especially recently in Iran, there has been an increase in its tendency, but on the other hand, since the goods in e-commerce are not tangible like in traditional commerce, it needs to follow a different approach. The current research is an applied research that examines the concepts of e-commerce, e-shopping, marketing mix and the relationship between them. The results showed that among all factors (independent variables), Product had the highest impact on customers' purchase intentions.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125680155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Potencial de aislados de Trichoderma spp como promotor de crecimiento en plántulas de tomate (Solanum lycopersicum)","authors":"María Delfina Sánchez Miranda","doi":"10.5377/nexo.v35i04.15529","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15529","url":null,"abstract":"Debido a la necesidad de producir alimentos sanos y de calidad, los sistemas agroproductivos actuales están incursionando en el uso de métodos sostenibles e inocuos para el control de plagas y mejora de la nutrición vegetal. Entre estas opciones ha sido estudiado Trichoderma spp., como promotor de crecimiento vegetal, sin embargo, en Nicaragua existen pocos estudios sobre este tema. El presente estudio pretende identificar y cuantificar el potencial de aislados nativos de Trichoderma spp., como promotores de crecimiento y peso en el tomate. La solución de Trichoderma sp. utilizada se obtuvo de una solución madre diluida a una concentración de 108 conidias /ml, utilizando 1 ml de dicha solución en el sustrato de siembra. Los tratamientos evaluados fueron T1: T. harzianum; T12: T. asperelloide; T11c: T. viride; T8: T. songyi; F2TG-11: T. breve; T3: T. asperellum; CIXD-07: T. virens. Al tratamiento testigo (sin inocular) sólo se le agregó 1 mL de agua destilada estéril. Todas las bandejas se mantuvieron en oscuridad a 28±2°C. Las variables a medir fueron altura, peso, longitud de las raíces de las plántulas, realizándose la medición a los 25 días después de la emergencia. Los resultados muestran que, al compararse con el testigo, los aislados de T. harzianum y T. viride presentaron el mayor potencial promotor de crecimiento obteniéndose una ganancia de 38.8% y 22.6% en altura, 72% y 46.3% en peso y 70% y 36.3% en longitud de raíces respectivamente.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129294787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Sekerin, Anna Gorokhova, S. Bank, N. Gayduk, Liudmila Gorlevskaya
{"title":"Transformation of the labor market and the necessary professional competencies of employees under the influence of the development of technologies and practical sciences","authors":"V. Sekerin, Anna Gorokhova, S. Bank, N. Gayduk, Liudmila Gorlevskaya","doi":"10.5377/nexo.v35i04.15532","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15532","url":null,"abstract":"With the transformation of technologies, the requirements for labor resources are also being modified, for which it will be necessary to adapt to the latest circumstances and trends in the labor market in the short term. Therefore, it is important to have work skills and competencies that are practically significant and relevant for a potential employer. The sectoral nature of the economy, technologies implemented by companies and technical production equipment set the tone for the professional structure of personnel and the demand for labor resources, considering professional competencies. According to experts, to adapt and respond to uninterrupted technological progress in the future, people will alternately master about 10 professions throughout their lives. Today, as in the last 5-7 years, the demand for IT specialists is actively developing, to a greater extent for system and computer developers and analysts, and security experts. Modern employers point out that development skills along with easy learning new things are the priority qualities of potential employees. In addition: the ability to correctly respond to the introduced technological changes; communication skills not only within a single specialty, but also far beyond its framework; processing the large information volumes. The priority competencies of personnel are closely linked to the technological space and economic digitalization of Russia.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127850267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Neverov, Igor Korotkiy, E. Korotkaya, P. Korotkih
{"title":"Thermophysical and chemical characteristics of tropical fruits","authors":"E. Neverov, Igor Korotkiy, E. Korotkaya, P. Korotkih","doi":"10.5377/nexo.v35i04.15536","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15536","url":null,"abstract":"When developing canning technologies raw material processing processes thermophysical calculations are inevitably used. This work's purpose is to analyze the tropical fruits thermophysical characteristics. The research objects were the following fruits: kiwi, papaya, avocado and figs. The stationary flat layer method was used to analyze the thermal conductivity. The cryoscopic temperature was determined by the thermogram flat surface which was obtained during the product freezing. The hydrostatic weighing method was used to determine the density. The sugar content was determined using the refractometric method. The moisture content was determined by drying-out to a constant mass. As a result of the carried out work, the physical and chemical parameters of kiwi, avocado, papaya and figs were determined. The thermophysical properties of tropical fruits such as heat capacity, cryoscopic temperature, thermal conductivity, and the amount of frozen moisture, were calculated.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121018929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Novel Algorithm for Redundant Data Filtering in WSN and RFID Integrated Networks","authors":"Mahia Samani, Ahmad Khademzadeh, K. Badie","doi":"10.5377/nexo.v35i04.15550","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15550","url":null,"abstract":"Wireless sensor networks (WSN) and radio frequency identification (RFID) are base technologies employed in decentralised dynamic environments. In the hybrid network formed by integrating RFID and WSN, RFID data can be used applying WSN protocols for multi-hop communications. However, RFID data contain excessive duplication, which increases time delay and energy consumption, resulting in wastage of different resources. There exist four popular RFID–WSN integration architectures: hierarchical RFID-sensor topology, network RFID-sensor topology, reader-sensor nodes topology, and mixed topology. In this paper, we propose a new plan for a WSN–RFID integrated network. The entire network is divided into clusters, and the clustering hierarchical routing algorithm is employed to send data from the head nodes to the base station. Further, we propose two algorithms to overcome redundant data on the hybrid network. Our simulation results demonstrate that the proposed method reduces redundant data and processing time compared with existing methods.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130464359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Forecasting Suitable Supplier for Construction Project Using Machine Learning Techniques","authors":"Meysam Ebrahimi Lakmehsari, Seyed Jalaluddin Hosseini, Seyed Kamaluddin Hosseini","doi":"10.5377/nexo.v35i04.15549","DOIUrl":"https://doi.org/10.5377/nexo.v35i04.15549","url":null,"abstract":"The aim of the research is to forecast the suitable suppliers for construction project using machine learning techniques. Firstly the librarian studies were conducted and research gap is extracted. Then innovation was determined. Based on the innovation a model for suitable supplier forecasting for construction project using machine learning techniques were provided. The model includes 12 entry variables and 1 output variable that include supplier performance. The model using 2 algorithm of artificial neuron network and support vector machine were conducted and the most influencing factors were determined using decision tree algorithm. The general comparison between artificial neuron network and support vector machine indicate the better performance of artificial neuron network based on decision tree. Based on decision tree results we can say that the supplier company income is considered as most important variable. The order change cost variable play the separator role in lower level. The life variables of companied and guarantees after company income and change cost of order play the main role.","PeriodicalId":335817,"journal":{"name":"Nexo Revista Científica","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125813020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}