bluuebunny/crossref_metadata_2025 huggingface dataset:
Estimation of electromagnetic compatibility of a narrow-band radio channel under the influence of unintended interference of the radar complicated pulse signals
Authors: Bykov V.V. , Gandurin V.A. , Grebennikov V.B. , Poberezhnik F.V.
Published: October 2021

The relevance of estimation of the electromagnetic compatibility (EMC) of narrow-band radio communication channels under the influence of unintended interference (UI) from radars with complex signals is due to the widespread use of both the first and second ones. At the same time, its equipment is often installed at the same carriers, which further complicates the task of providing EMC. The specificity of this situation is that narrow-band radio channels occupy a frequency band measured in few kilohertz, and the width of the spectrum of complicated signals used by radars is several and tens of megahertz. Under these conditions, during the preliminary estimation of the EMC, it is advisable to use the method of mathematical modeling and approximate a narrow-band radio receiving device (RRD) exposed to broadband UI with an equivalent circuit characterized with a given degree of accuracy by the parameters of this RRD. In this case, we used a chain approximation of the 4th order. This chain is represented by a system of differential equations that is solved in MATLAB. As a result of calculations, the dependence of the coefficient of suppression of unintended interference on the parameters of signals, interference and radio receivers was found. It was found that in the example under consideration, the suppression of unintended interference is at least 37 dB.
REGULARITY AND CONVERGENCE TO EQUILIBRIUM FOR A CLASS OF NONLOCAL EVOLUTION EQUATIONS
Authors: Pham Thanh Tuan
Published: October 2021

We study a class of semilinear nonlocal partial differential equations, which model different problems related to processes in materials with memory. Our aim is to derive sufficient conditions ensuring the global solvability, regularity, and convergence to equilibrium of solutions
ANNOTATED CHECKLIST OF THE TERRESTRIAL MOLLUSCS (MOLLUSCA: GASTROPODA) FROM DONG VAN DISTRICT, HA GIANG PROVINCE, VIETNAM
Authors: Do Duc Sang , Nguyen Thanh Son , Nguyen Thi Hue
Published: October 2021

An annotated checklist of the terrestrial molluscs from Dong Van District is presented. The checklist combines data from all material collected from March 2018 to December 2020 and previous studies. The checklist provides an overview of the diversity of the terrestrial molluscs occurring in the Dong Van area. A total of 59 species representing 16 families are documented. Three species (or 5.08%) of these species are endemic to Ha Giang Province. A species recorded for Northern Vietnam and 28 species of the terrestrial molluscs for Ha Giang Province are herein published for the first time. We also briefly discuss the extent of diversity and endemism in the terrestrial molluscs of the Dong Van area.
AN EXTENDED TADPOLE DESCRIPTION OF Rhacophorus helenae (Rowley, Tran, Hoang, and Le, 2012) (ANURA: RHACOPHORIDAE) FROM DONG NAI CULTURE AND NATURE RESERVE, AN ENDEMIC SPECIES OF VIETNAM
Authors: Nguyen Thi Loc , Truong Hong Ngoc , Le Trung Dung
Published: October 2021

Rhacophorus helenae Rowley, Tran, Hoang, and Le, 2012 was recently described from is southern Vietnam, listed as Endangered in the IUCN Red List of Threatened Species (IUCN SSC Amphibian Specialist Group 2020). The larval morphology in stages 35, 37-39, 41 of this species was provided by Vassilieva et al., 2016. We describe the external morphology of the tadpoles of the species R. helenae collected from Dong Nai Culture and Nature Reserve, Dong Nai Province, Southern Vietnam. The morphology of 23 tadpole specimens (Gosner stages 26, 28, 29, 32, 34, 35, 39, 41, and 43) of this species are also provided. We provide an updated development stage and discussion of the tadpole morphology different of the genus Rhacophorus.
Factors affecting the quality of teaching English to non-English major studens at National Economics University
Authors: Pham Thanh Nhan , Trinh Thi Hanh
Published: October 2021

The research attempts to explore the factors affecting the quality of teaching English to non-English major students at National Economics University (NEU). Both quantitative and qualitative data collection tools are employed in the research. The survey for the students which aims to collect quantitative data is conducted based on the qualitative data collected from the interviews with the head of the foreign languages faculty, the head of the department of foreign language for specific purposes and the lecturers teaching English to non-English major students at NEU. The findings reveal that teaching methods have the most important influence on the quality of teaching English to non-English major students at NEU. The next influential factors are teaching contents, students’ attitudes and motivation, lecturers’ attitudes and perception, testing and assessment methods, teaching and learning facilities. Some suggestions and recommendations for administrators, lecturers and students are proposed in the research in order to improve the quality of teaching English to non- English major students at NEU.
Temporomandibular joint disorders in children and adolescent: A review
Authors: Urukalan Haritha , Ahmed Nausheer , Shetty K Sherya , Nikhil P M  , Younus Abrar , Joseph Rithika
Published: October 2021

Temporomandibular disorders (TMD) are a group of joint and muscular dysfunctions affecting the Cranio-orofacial area. Historically, TMDs were once believed to solely affect adults; however, recent studies have discovered an increased prevalence of TMD signs and symptoms in children and adolescents. The reported prevalence of these disorders in pediatric patients varies significantly due to methodological variations among studies; as a result, standardized diagnostic criteria for children are required. In this age group, TMDs can cause pain in the masticatory muscles and TMJs, as well as limited or asymmetric mouth opening and TMJ sounds. Rather than a single causative element, TMDs are produced by a combination of factors such as trauma, occlusion, systemic and developmental problems, and psychological disorders. A complete history and examination, which may include imaging, are essential to obtain a precise diagnosis and assure successful treatment of many disorders. For these issues, there is a range of therapeutic interventions available, although reversible treatments should be favored.
The comparison between the lower airway space, mandibular body, mandibular ramus, chin thickness and chin throat length in vertical and horizontal growers among skeletal class I and skeletal class II patterns – Retrospective cephalometric study
Authors: Kadam Vighanesh , Aphale Hrushikesh , Nagmode Sunil Kumar , Pawar Vasant , Patil Kunal , Sahane Deepak , Shinde Vivek
Published: October 2021

The vertical and horizontal growth influences the height of mandibular ramus and length of the mandibular body. The soft tissue chin thickness, the lower airway space and the chin throat length can vary in different growth patterns and different skeletal patterns.

Lateral cephalograms of non-growing patients seeking orthodontic treatment (n=120) were included in the study. The samples were divided into two subgroups based on skeletal pattern (Cl I & Cl II) according to ANB angle and Wit’s appraisal. Further sub divided into four groups based on cephalometric mandibular plane inclination to anterior cranial base (SN-GoGn) and Frankfort’s mandibular plane (FMA) angle in hypodivergent and hyperdivergent patterns. The parameters lower airway space, mandibular body, mandibular ramus, chin thickness and chin throat length were measured.

Results showed maximum lower airway space, mandibular body, mandibular ramus, chin thickness, and chin throat length in the hypodivergent skeletal Class I group. The minimum lower airway space, mandibular body, mandibular ramus, chin thickness, and chin throat length observed in the hyperdivergent skeletal Class II group. The inter-group comparison of all samples indicates that there was a statistically significant difference between various groups and the measures of the hypodivergent samples are more than the hyperdivergent samples irrespective of the skeletal pattern.

The study concludes that the lower airway, mandibular ramus, mandibular body, soft tissue chin thickness, chin throat length was less in hyperdivergent skeletal Class I and skeletal Class II samples than the skeletal Class I and skeletal Class II hypodivergent.
Comparative characterization study of plant based calcium versus synthetic calcium
Authors: Raut Supriya H , Gadani Mihir C
Published: October 2021

Calcium is an essential mineral which supports bone health as well as serves as a major therapeutic intervention that can prevent and delay the incidence of osteoporosis.Multicellular aquatic plants like are a rich source of plant based calcium.

To characterize Plant based calcium and Synthetic calcium sources using sophisticated analytical techniques.

Plant based Calcium and Synthetic Calcium sources were subjected to instrumental analysis such as SEM, ICP-OES and XRD, and comparisons were done followed by interpretation.

In this study, three different instrument techniques like SEM, ICP-OES and XRD were used for the characterization of plant based calcium and synthetic calcium. The results showed that plant based calcium were smaller isotropic crystals as compared to synthetic calcium crystals which were larger and anisotropic. Further, in case of XRD results, plant based calcium is shown to possess two 2θ values, whereas in case of synthetic calcium, it showed a single 2θ value. Further, Magnesium and Boron content were higher in case of plant based calcium as compared to synthetic calcium.

Both Plant based and Synthetic Calcium can be distinguished using SEM, ICP-OES and XRD techniques. Outcomes of this study enlightens the probable reasons for enhanced bioavailability in case of plant based calcium sources as compared to synthetic calcium sources.
ENHANCING EUROPEAN SECURITY: MODERN CHALLENGES POSED BY NUCLEAR WEAPONS
Authors: Patussi T. , Kurando M.
Published: October 2021

The proposal of Europeanising French deterrence was revived by French President Emmanuel Macron, who declared in February 2020 that French nuclear forces reinforce European security simply by existing and suggested a strategic dialogue with all EU partners regarding the role of French nuclear weapons in European security. Macron further reasoned that this issue is increasingly urgent nowadays as the EU must jointly realise that, because of the lack of a legal structure, they may easily find themselves vulnerable to the resumption of a traditional, even nuclear, arms race on their land. The prospects of global control of weapons and disarmament efforts are very blurry in the times of rising political tensions, revived nuclear arms races, and weakening trust in multilateralism. Nevertheless, this all leads to the necessity to support active actions towards nuclear risk reductions, whichhave recently appeared in some of the multilateral forums. The elimination of nuclear risk is nothing but an intermediate measure to reduce nuclear proliferation dangers until they are liquidated. It is essential to review the risks of accidents involving nuclear weapons and their influence on European security, along with focusing on the role of European nuclear weapon states (NWS), their place in global security and possible scenarios for their future: the authors considered the possible prospects of the EU as another entity with nuclear weapons, as well as the likelihood of the EU as another regional nuclear-free zone and discussed whether the real change is possible.
ЖИЗНЕННЫЙ МИР МОЛОДОЙ СЕМЬИ В РОССИИ: МЕТОДОЛОГИЧЕСКИЙ КОНСТРУКТ СОЦИОЛОГИЧЕСКОГО ИССЛЕДОВАНИЯ
Authors: Артамонова Яна Викторовна
Published: October 2021

В рамках статьи автор обращается к теоретико-методологическим основам исследования молодой семьи. Автор отмечает, что изучение молодой семьи является популярной отраслью социологии с различной методологией социологического познания, куда можно отнести структурно-функциональный подход, консервативно-кризисный, либерально-прогрессистский теоретико-методологические подходы, концепцию модернизации семьи, теорию обмена, социально-психологическую теорию, а также концепцию семейного жизненного пути, феноменологическую теорию. По мнению автора статьи, для более глубокой социологической рефлексии жизнедеятельности молодой семьи необходимо обратиться к ее жизненному миру, для рассмотрения которого необходимо разработать специальный методологический конструкт социологического изучения. В связи с этим цель работы − выявление теоретико-методологических оснований социологической рефлексии жизненного мира молодой семьи. В результате проведенного анализа автор приходит к выводу, что наиболее подходящий методологический конструкт изучения жизненного мира молодых супругов складывается на основе неоклассической модели научного исследования, которая базируется на идеях конструктивизма. Для наиболее глубокой рефлексии при рассмотрении жизненного мира автор предлагает использовать теоретическую концепцию социологии жизни и рискологическую концепцию молодежи, которая позволит найти болевые точки молодой семьи, нарушающие стабильное функционирование ее жизненного мира.
СТАТУСНАЯ РАССОГЛАСОВАННОСТЬ КАК ФАКТОР НЕУДОВЛЕТВОРЕННОСТИ ЖИЗНЬЮ В РОССИЙСКОМ ОБЩЕСТВЕ
Authors: Петренко Георгий Максимович , Петренко Максим Степанович
Published: October 2021

Рост социальной напряженности в России, усилившееся недовольство властью заставили ряд исследователей обратиться к изучению социальной структуры российского общества. Особый интерес вызывает теория статусной кристаллизации, согласно которой причиной многих социальных проблем является наличие в обществе статусных рассогласований. В современной социологической науке нет единого мнения относительно влияния статусной рассогласованности на социальное самочувствие населения и их удовлетворенность жизнью. На Западе долгое время доминировали исследования, обнаруживающие отрицательную зависимость между благополучием и наличием статусной рассогласованности. В этой связи возникает необходимость взглянуть на ситуацию, сложившуюся в России. Цель работы: анализ субъективных статусных рассогласований в иерархиях богатства, власти, престижа среди населения России в контексте концепции статусной кристаллизации и выявление связей между рассогласованием статусов и удовлетворенностью жизнью. Эмпирической базой исследования послужили данные «Российского мониторинга экономического положения и здоровья населения НИУ ВШЭ (RLMS-HSE)». Масштаб и структура статусных рассогласований были определены посредством сопоставления позиций индивида в обозначенных социальных иерархиях. Для анализа связи статусной кристаллизации и удовлетворенности жизнью использовались логистическая регрессия и коэффициент Крамера. Результаты: уровень статусной рассогласованности в современном российском обществе весьма значительный, однако связь между субъективным статусным рассогласованием и удовлетворенностью жизнью оказалась предельно мала. Некоторая зависимость была обнаружена между несоответствием уровня профессионального мастерства и вознаграждения, с одной стороны, и удовлетворенностью − с другой. Вывод: статусные рассогласования не оказывают существенного влияния на удовлетворенность жизнью в российском обществе, в котором существует неопределенная социальная структура, и благополучие человека зависит от множества других факторов.
LA EDUCACIÓN TRIBUTARIA DE LOS ESTUDIANTES DE PRIMARIA DEL MUNICIPIO DE ACTOPAN, VERACRUZ
Authors: Sinforoso Martínez Saulo , Álvarez Velázquez Edalid , Lagunes Guevara Luisa Angélica
Published: October 2021

OBJETIVO: Realizar un diagnóstico de la educación tributaria de los estudiantes del 6° de las escuelas primarias públicas del municipio de Actopan, Veracruz, México.

MATERIAL Y MÉTODO: La investigación tiene un enfoque cuantitativo con alcance descriptivo, de tipo transversal. Como técnica de recolección de datos se utilizó una encuesta, utilizando como instrumento un cuestionario de 10 preguntas cerradas. El estudio se realizó durante el mes de junio del 2017 en el municipio de Actopan, Veracruz, México. El campo de aplicación fue en 10 escuelas primarias públicas, se tomó una muestra del 10% de la población, encuestando a 50 alumnos.

RESULTADOS: La mayoría de los estudiantes desconocen que son los impuestos y así mismo desconocen su aplicación, sin embargo, están interesado en conocer sobre la temática, pues la mayoría ha escuchado al respecto en los medios masivos de comunicación.

CONCLUSIONES: Es necesario un Programa de Civismo Fiscal aplicado a la educación básica en México para fomentar una educación tributaria entre los futuros contribuyentes.
FACTORES ASOCIADOS AL DESEMPEÑO DE LA CADENA DE SUMINISTRO AGROALIMENTARIA DE MÉXICO: EL CASO DE LA ZARZAMORA
Authors: Gutiérrez Ortiz Ariel , Zárate Cornejo Robert Efraín , Infante Jiménez Zoe Tamar
Published: October 2021

OBJETIVO: Identificar y correlacionar los factores que están asociadas al desempeño de una cadena de suministro agroalimentaria de México, tomando como caso el cultivo de la zarzamora en fresco producida en el valle de Los Reyes, Michoacán.

MATERIAL Y MÉTODO: La investigación es de tipo descriptivo-correlacional. Se utilizó el coeficiente de correlación de Spearman y el estadístico de asociación gamma de Goodman y Kruskal para conocer la correlación y asociación, respectivamente, entre las variables independientes y la variable dependiente.

RESULTADOS: Los factores asociados al desempeño de la cadena de suministro agroalimentaria fueron, en orden de importancia: eficiencia/costo, capacidad de respuesta al cliente, flexibilidad, calidad en el producto, calidad en el proceso y las relaciones cliente-proveedor.

CONCLUSIONES: Derivado del análisis de los resultados, se logró identificar que todas las variables independientes tienen correlación y cierto grado de asociación con la variable dependiente. Se deben diseñar métricas e indicadores para medir el desempeño de una cadena de suministro, lo que les permite un control adecuado sobre las variables o factores que mayormente influyen en dicho desempeño. Existe interés de los productores sobre el tema de la cadena de suministro, lo cual revela que tienen un compromiso con su empresa.
FACTORES DETERMINANTES DE LA PERSONALIDAD DE MARCA. UN ESTUDIO EMPÍRICO EN ESCENARIOS VERACRUZANOS
Authors: Barón López Ena Yuritze , García Santillán Arturo
Published: October 2021

OBJETIVO: Demostrar la relación que puede existir entre los rasgos de la personalidad de marca humana y la personalidad de una marca en un contexto latino.

MATERIAL Y MÉTODO: Los análisis de este estudio se hacen a partir de la propuesta de Jenifer Aaker y la escala de personalidad humana que se consideran todavía de gran importancia para poder explicar esta asociación de valores.

RESULTADOS: Los datos se recogieron en el contexto latino, específicamente en el estado de Veracruz en México esto con el propósito de confirmar si la escala tiene la misma fiabilidad en contextos diferentes al original. Mediante un análisis factorial se buscó aceptar las hipótesis de propuestas.

CONCLUSIONES: Este estudio también puede explicar que si existe una personalidad de marca relacionadas con las marcas de botanas o snacks, sin embargo es importante que en futuros trabajos se pueda comprobar si esta relación puede influenciar la preferencia del consumidor.
ANÁLISIS DEL PATRÓN DE COMPORTAMIENTO DEL CONSUMIDOR DE QUITO, ECUADOR
Authors: Salazar Lozada Guido Marcelo , García Rodríguez José Félix , Méndez Olán Luis Arturo
Published: October 2021

Este estudio presenta las preferencias -según su prioridad- de compra de bienes principales y comunes para todas las personas que habitan en la ciudad en un momento específico y en una situación económica del país propia de la época -año 2018-.

OBJETIVO: Proporcionar información del comportamiento del consumidor de Quito, cuando se trata de adquirir bienes necesarios y que por diferentes factores no los pueden obtener.

MATERIAL Y MÉTODO: Investigación con enfoque mixto, en la cual se aplicaron dos métodos de investigación. Para la parte cualitativa, a través de un grupo focal, se utilizó el método inductivo, así como la elaboración de preguntas de la encuesta aplicada, y con el apoyo del método deductivo se realizó la investigación cuantitativa, aplicada a 626 consumidores.

RESULTADOS: Las prioridades del consumidor de Quito, son los alimentos, los cuales compran en supermercados; los electrodomésticos los adquieren en tiendas especializadas, buscando almacenes con variedad de marcas, toman la decisión de compra sin consultar y pagan de contado bienes menores a $500.

CONCLUSIONES: Los alimentos son su primera prioridad, por lo que se entiende que en épocas de recesión económica se privará de muchas adquisiciones que no sean alimenticias. Asimismo, los proveedores de alimentos deben centrarse en tener mayor presencia en los supermercados.
EL USO DE REDES SOCIALES EN LAS MICROEMPRESAS PANIFICADORAS DE TABASCO
Authors: Velenzuela Ramos Miguel Ángel , Navarrete Torres María Del Carmen
Published: October 2021

En la actualidad, las redes sociales han cobrado gran relevancia en el sector económico del país, constituyéndose como un elemento de gran importancia para el desarrollo y posicionamiento de cualquier empresa. La innovación de los sistemas de producción y distribución, se caracteriza por la adopción de las herramientas digitales contemporáneas.

OBJETIVO: Determinar el nivel de uso que las microempresas dedicadas a la producción de pan en el estado de Tabasco, específicamente en la ciudad de Villahermosa les dan a dichas herramientas para aumentar sus niveles de venta.

MATERIAL Y MÉTODO: Se utilizó una metodología no experimental mixta con un diseño transeccional.

RESULTADOS: En la investigación se encontró que más del 50% de las microempresas panaderas en Villahermosa no usan redes sociales. Así mismo se comprobó que únicamente un 20% de los empresarios cree tener conocimiento referente a las ventajas del uso de herramientas digitales.

CONCLUSIÓN: Derivado del análisis podemos determinar que los comercios dedicados al expendio de pan en el estado presentan niveles bajos en relación al uso de medios digitales, por lo que se propone que los empresarios deberán capacitarse para el uso de dichas herramientas a fin de tener una mayor ventaja competitiva.
MOVILIDAD ESTUDIANTIL NACIONAL: INCLINACIÓN DE LOS UNIVERSITARIOS HACIA LA TOMA DE DECISIONES
Authors: Solís López Itxayana Guadalupe , Hernández Romero Gladys
Published: October 2021

La movilidad es un programa académico con el cual cuentan las Instituciones de Educación Superior (IES); éstos son revisados constantemente por evaluadores y acreditadores avalados, los cuales se encuentran en constante cambio, ocasionados por la globalización.

OBJETIVO: Exponer la percepción que tienen los estudiantes universitarios de los beneficios que se puedan obtener de la movilidad nacional e identificar el motivo por el cual elegirían la universidad a la cual postular.

MATERIAL Y MÉTODO: Se desarrolló una investigación cuantitativa, con un enfoque transversal, ya que solo se aplicará en un solo momento, no experimental, al igual que no probabilística, debido que se encuestaron a los sujetos a conveniencia.

RESULTADOS: Se muestra que el 81% de los universitarios conoce la existencia del programa, pero que el 100% de ellos no ha vivido la experiencia, también sobresale que la información que tienen acerca de la movilidad es poca, debido a la falta de divulgación y conocimiento del programa con el que cuentan los universitarios.

CONCLUSIONES: Los estudiantes mantienen en consideración la oportunidad de hacer su pasantía en otras instituciones educativas, tales como: la Universidad Autónoma de Yucatán, Universidad de Guadalajara y la Universidad de Monterrey, lo que hace hincapié a su preferencia de permanecer dentro del país y no a viajar al extranjero.
APLICACIÓN DEL MODELO DE LAS 5 FUERZAS EN EL SECTOR PORCINO EN YUCATÁN
Authors: Pérez Brito Antonio Emmanuel , Bojórquez Zapata Martha Isabel
Published: October 2021

La carne de cerdo es considerada la más popular del mundo, su consumo representa una participación del 38%, en comparación con el 35% para carne de ave y 23% de vacuno; sin embargo, se espera que el tejido de ave supere el consumo de cerdo para 2020 (European Comission, 2015). La producción de cerdo está distribuida en todo el mundo, excepto en aquellas regiones que mantienen ciertas reservas culturales sobre su consumo, y su industria ha alcanzado un elevado rendimiento (FAO, 2016). Los mayores productores a nivel mundial son China, la Unión Europea, Estados Unidos y Brasil (OCDE/FAO, 2017).

OBJETIVO: Identificar el entorno de competitividad que tiene el sector porcino en el estado de Yucatán a través del modelo de las 5 fuerzas de Porter.

MATERIAL Y MÉTODO: Se utilizó un tipo de estudio cualitativo, interpretativo, teoría fundamentada, la recolección de datos se realizó a través de la entrevista.

RESULTADOS: Se obtuvo como resultado, un nivel alto de competitividad de los productores de carne porcina en el estado de Yucatán con base en el modelo aplicado.

CONCLUSIONES: Es un sector estratégico para el estado, por las aportaciones que genera para el desarrollo económico de la región.
EXPLORATORY FACTOR STRUCTURE OF PROFESSIONAL TRAINING EXPECTATIONS
Authors: García Lirios Cruz
Published: October 2021

OBJECTIVE: The main objective of this wok is the exploration of two preponderant dimensions of professional training.

MATERIAL AND METHOD: An experimental study was carried out with a non-probabilistic selection of 300 students, considering their insertion in professional practices and social service in organizations allied with the public university.

RESULTS: A dual structure of norms and values found with eight indicators explain the formation of job expectations in future professionals.

CONCLUSION: The design limited the findings to the research scenario, suggesting the inclusion of other factors as well as the comparison of the model in other vocational training contexts such as the companies that participate in government subsidies to promote the first job in young graduates.
LOS GRANDES CORPORATIVOS DE LA FRACCIÓN MONTERREY
Authors: García Rodríguez José Félix
Published: October 2021

En el contexto actual de una economía global, la empresa como institución económica juega un papel fundamental en el crecimiento económico de los países. De hecho, el grado de desarrollo y bienestar de las sociedades está determinado y condicionado por el grado de industrialización y modernización de su planta empresarial. Por ello, la autora de la presente obra afirma, con todo conocimiento de causa, que las unidades económicas básicas del sistema capitalista son las empresas, mismas que llevan a cabo la producción de los bienes y servicios que satisfacen las necesidades de la sociedad.

De manera más específica, puede decirse que dentro de la actividad económica de un país, la empresa juega un papel fundamental, pues cumple diversas funciones sociales entre las que destacan: a) Coordinación, dirección y control de los procesos de producción de bienes y servicios que satisfacen las necesidades de la sociedad; b) Creación o aumento de la utilidad y valor agregado de los bienes y servicios básicos para la humanidad; c) Creación de empleos y generación de riqueza en beneficio de la sociedad en su conjunto.
EVALUACIÓN DE SERVICIO EN LAS EMPRESAS DE LA RUTA DEL VINO EN EL ESTADO DE GUANAJUATO
Authors: López Barberena Adriana , Zárate Negrete Laura Elena , Sánchez Ramos María Eugenia
Published: October 2021

OBJETIVO: Determinar las prácticas comerciales en el servicio al cliente para mejorar las estrategias mercadológicas de la zona. Las empresas elegidas son productoras y comercializadoras conocidas como “viñedos boutique”.

MATERIAL Y MÉTODO: La investigación es explicativa, descriptiva, exploratoria de corte transversal y enfoque mixto. El instrumento de medición corresponde a una guía de observación indirecta no participante para evaluar dimensiones del pentágono de Babson College utilizando la escala de Likert.

RESULTADOS: Entre los hallazgos se identificó que los viñedos son competitivos en la parte de la infraestructura y el servicio, pero se tienen carencias importantes en el área de los productos y su comercialización.

CONCLUSIONES: El impacto de esta evaluación es alto porque se carece de información en el ámbito del servicio en la ruta vitivinícola en el estado de Guanajuato.
Comparación y concordancia de las ecuaciones más recomendadas de estimación de filtrado glomerular para el diagnóstico de enfermedad renal crónica en una población de Lima, Perú
Authors: Cieza Zevallos Javier Antonio , Uriol Lescano Celene Taís , Chang Dávila Domingo
Published: October 2021

Objetivo: Determinar la correlación y concordancia de fórmulas recomendadas para calcular la tasa de filtración glomerular (TFG) con el aclaramiento de creatinina medido (Clcr) en una población hospitalaria peruana. Material y métodos: Estudio de correlación y concordancia de personas con estados diferentes de función renal. Fueron estudiados 175 pacientes agrupados según el Clcr: Grupo 1: valores mayores de 140, Grupo 2: entre 140 a 90, Grupo 3: entre 90 a 60 y Grupo 4 cuyos valores fueron menores de 60 ml/min/1,73 m2  de SC. Se excluyeron los pacientes obesos (IMC>29). En una junta de orina de 24 horas y una muestra de sangre matutina se midió el Clcr (normalizado a 1,73 m2 de superficie corporal). Las fórmulas consideradas fueron: Cockcroft y Gault, MDRD, CDK- EPI y una fórmula peruana propuesta por Vásquez. Se analizó la correlación de Pearson entre las diversas fórmulas consideradas y el Clcr medido y su concordancia mediante el estudio de Bland Altman, de las diversas fórmulas usando la diferencia entre el resultado de cada fórmula para cada sujeto estudiado y el Clcr medido.  Resultados: Todas las fórmulas propuestas tuvieron buen grado de correlación con el Clcr pero la fórmula CKD-EPI mostró importante imprecisión. Las fórmulas de Vásquez y MDRD mostraron leves diferencias favorables en pacientes con Clcr<60 ml/min. Conclusión: Recomendamos en nuestra población el uso de cualquiera de las fórmulas propuestas excepto CKD-EPI.
Autekologi dan Pemanfaatan Buah Untit (Nephelium maingayi Hiern) oleh Suku Dayak Ngaju Kalimantan Tengah
Authors: Pujiarti Dini , Gunawan Gunawan , Pujawati Eny Dwi
Published: October 2021

Indonesia is a country with diverse genetic resources (SDG) of tropical fruits, this study aimed to provide information about Untit fruit including environmental factors associated with this fruit (Nephelium maingayi), and utilization of the Untit fruit plant by the Dayak Ngaju tribe in Cempaga District, Kotawaringin Timur Regency, Central Kalimantan. The data used in this study were primary data and secondary data. Primary data collection was carried out by field observation and semi-structured interviews using a questionnaire. Secondary data is the result of literature studies from various libraries to support primary data. Environmental parameters (air temperature, humadity, soil pH, soil temperature, altitude and distance from water sources) in the field were analysis using Principal Component Analysis (PCA). The result of analysis showed that the most influential enviromental factor Untit fruit plants was air temperature. The plant was used as table fruit, medicine and building materials. In addition, the fruit plant Untit is used by the Dayak Ngaju tribes as a medicine for stomach aches (dysentery), medicine for wounds, rashes, pimples and ulcers. The most widely used parts of the plant were fruit, leaves, stems and bark.
Potensi Vegetasi Semak di Kelurahan Bangkal, Palam dan Sungai Tiung, Kecamatan Cempaka, Banjarbaru
Authors: Rahmani Dienny Redha , Gunawan Gunawan
Published: October 2021

A good urban structure and activity need a green spaces to increase its ecological function. However, trees will not fully be able to fill an important space in urban areas while the shrub woody vegetation has the potential to fill that space. Therefore, the aim of this study is to determine the  potential of shrub as a constituent of urban vegetation so it can be used as material information about the planning of land use in the district of Cempaka. This sudy was conducted by determining the three sampling stations and 3 plots of 4m x 4m in wide on each station with data based on a map of shrub green space in District of Cempaka using purposive sampling method, the analysis performed includes the analysis of shrub canopy, measured environmental parameters, and data were analyzed with analysis of canopy volume, Pearson correlation analysis and analysis of Importance Value Index (IVI). Shrub vegetation estimation results indicate that the shrub canopy volume in the district of Cempaka is up to 22,462,878.50 m3 in the bush land area of 5675.116 hectares. Pearson correlation analysis showed that the shrub canopy volume in the district Cempaka effect on changes in environmental factors. Besides the most dominant species is Ficus fistulosa Reinw. ex Bl with IVI of 56.1%. Based on the results obtained can be concluded that the shrub has potential as a constituent of vegetation in urban green space.
ABOUT STABILITY OF THE MOVEMENT OF THE REFUELING VEHICLE EQUIPED WITH DIGITAL SYSTEM OF BRAKE FORCES DISTRIBUTION DURING THE EMERGENCY BRAKING
Authors: Aleksandrov Eugene , Aleksandrova Tetiana , Morgun Yaroslav
Published: October 2021

The impact of enforced oscillations of the free surface of fuel in the car tank on the stability area of a closed digital brake force distribution system is considered. The object of the study is the process of stabilized movement of the tanker during the emergency braking. The subject of the study is a large tanker with a gross weight (3-3.5) *104 kg, equipped with a tank with a volume of (17-20) m3 and a system of direction stability. The goal of the work is investigation of the impact of transported fuel fluctuations on the stability of the refueling vehicle during the emergency braking and introducing of methods for selecting values of variable parameters of the electronic brake force distribution system to minimize it. Conclusion. Considering the oscillations of the free surface of the liquid in the mathematical model of disturbed movement of a closed system of stability significantly reduces the stability area of the system in the low frequency range due to the loop, the size and position of which depend on the filling level of the tank. Need to choose an envelope loop that according to different levels of tank filling.
Распространение вариантов вируса SARS-COV-2, вызывающих озабоченность (VOC) и интерес (VOI) на основе количества их геномов, депонированных в базу данных GISAID за неделю с 16.10. по 22.10.2021 г.
Authors: Дмитриева Людмила , Чумачкова Елена , Краснов Ярослав , Осина Наталья , Сафронов Валентин , Иванова Александра , Карнаухов Игорь , Караваева Татьяна , Щербакова Светлана , Кутырев Владимир
Published: October 2021

В обзоре представлен анализ геновариантов вируса SARS-CoV-2, вызывающих озабоченность (VOC) и интерес (VOI) на основе их геномов в базе GISAID за неделю с 16.10. по 22.10.2021 г.
Design and Build an IoT Based Prepaid Water Usage Monitoring System and Telegram Notifications
Authors: Priyanto Agus , Setiawidayat Sabar , Rofii Faqih
Published: October 2021

In the boarding house the use of water for each person is different for each occupant of theboarding house. The increase in water use is not proportional to the increase in water capacity and theequalization of payments for each boarding house is different. Utilization of technology Internet ofThings (IoT) and the freechat application Telegram in the application to monitor water usageinformation for each boarding house occupant. In this study, a water monitoring device was made tomonitor information from two different platforms. The server can monitor water usage information forall residents of the boarding house. Telegram provides notification information when the water capacityof boarding houses is approaching empty from each device. Using Arduino and ESP8266 as controllersand wifi connection with the server. With this system, it is easier for the boarding house owner tomonitor the water usage of each boarding house occupant.
Muhasebe Hilelerinin Ortaya Çıkarılmasında Benford Yasası’nın Kullanılmasına Yönelik Bir Uygulama
Authors: KAŞIKCI Bahar , DALGAR Hüseyin
Published: October 2021

Günümüzde işletmelerin karşı karşıya kaldıkları riskler arasında işletme çalışanları ya da diğer kişiler tarafından yapılan hileler yer almaktadır. Bu kişiler tarafından yapılan hileler büyük miktar da maddi ve manevi zarara yol açmalarından dolayı işletmelerin değerini, geleceğini ve kârlılığını olumsuz yönde etkilemekle birlikte, zaman zaman da işletmeleri iflasa sürüklemektedir. Art niyetli kişiler tarafından yapılan hileli işlemler, işletmelerdeki hile önleme prosedürleri ya da iç kontrol eksikliklerinin yetersizliği sebebiyle ortaya çıkartılamamaktadır. İşletmelerde meydana gelen bu hileleri ortaya çıkartmak için birçok denetim yöntemi kullanılmaktadır. Kullanılan bu yöntemlerden birisi de Benford Yasası’dır. Bu çalışmanın amacı analitik inceleme yöntemlerinden birisi olan Benford Yasası’yla muhasebe verilerinde meydana gelen hileli işlemleri ortaya çıkarmak ve muhasebe verilerine nasıl uygulanabileceğini göstermektir. Bu amaç doğrultusunda mermer sektöründe faaliyet gösteren bir işletmenin alış faturalarının kayıtlarında oluşabilecek hata ve hileleri ortaya çıkarmak, öngörülen hile düzeyini tespit etmek için işletmenin verilerine sayısal analiz testlerinden birinci, ikinci, ilk iki basamak ve mükerrer tutarlar testleri uygulanmıştır. Yapılan sayısal analiz testlerinin sonucunda gözlemlenen oranlarla Benford Yasası’nın oranları arasındaki farkları karşılaştırmak için de ki-kare uygunluk testi yapılmıştır. Yapılan sayısal analiz ve ki-kare uygunluk testleri sonucunda işletmenin verilerinde hata veya hile olmadığı, sapmaya neden olan tutarların işletmenin doğal yapısından kaynaklandığı sonucuna ulaşılmıştır.
Effects of Currently Used Antifouling Booster Biocides on Green Fluorescent Proteins in Anemonia Viridis
Authors: Ünver Batuhan , Evingur Gulsen Akin , Cavaş Levent
Published: October 2021

Some of the antifouling booster biocides affects the marine ecosystem negatively. The booster biocides which are resistant to degradation are accumulated in the sediment of the oceans. One of the sedentary organisms in the Mediterranean Sea is Anemonia viridis. The aim of this study is to show the toxicities of common biocides such as irgarol, seanine-211, zinc omadine, and acticide on the fluorescence by GFPs of A.viridis. The decreases in the fluorescence intensities of the GFP were measured within different booster biocide concentrations. The results show that fluorescent intensities of GFP proteins decreased more than 50 percent when they are exposed to different concentrations of irgarol, zinc omadine, acticide. In conclusion, ecosystem health should be prioritized when new antifouling paint compositions are proposed. From the results, it seems that A.viridis can be considered as a vulnerable organism and also it is sensitive to booster biocides within self-polishing antifouling paint formulations.
A comparative study of ionothermal treatment of rice straw using triflate and acetate-based ionic liquids
Authors: Jisha K.J. , Rajamani Sunita , Singh Dharmendra , Sharma Gyanendra , Gardas Ramesh L.
Published: October 2021

Ionic liquids (ILs) have found applications in the pretreatment of waste lignocellulosic biomass by interacting with the carbohydrate molecules present in the biomass materials. Pretreatment is an essential step prior to biomass conversion into valuable chemicals, fuels, and many other value-added products. This comparative study mainly focused on the pretreatment ability of four ILs having acetate or triflate as a common anion with different cations. Among various studied ILs, diazabicyclo[5.4.0]undec-7-ene (DBU)-based acidic ionic liquid when used as a dual solvocatalyst showed significant structural modifications of the rice straw (RS) sample, through C6-O bond breakage assisted by the tertiary nitrogen in DBU cation. Structural modifications due to the pretreatment were confirmed through SEM, PXRD, and FTIR analysis. Elemental analysis confirmed that carbon content in original RS is reduced to 29% and 20% upon ionothermal treatment of RS with IL at 90 °C and 120 °C, respectively. Additionally, TGA indicated that further pyrolysis could be easier with the pretreated rice straw yielding biochar upto 9% thereby reducing wastes. Conversion of RS was found to be 60 % which reduced marginally to 50 % after three cycles of recycling IL. The findings of this work provide the proof of concept that studied ILs with high thermal stability and recyclability should act as a potential solvocatalyst in sustainable pretreatment and other biomass applications.
Greenhouse gas emissions from global production and use of nitrogen synthetic fertilisers in agriculture
Authors: Menegat Stefano , Ledo Alicia , Tirado Reyes
Published: October 2021

The global agri-food system relies on synthetic nitrogen (N) fertilisation to increase crop yields, yet the use of synthetic N fertiliser is unsustainable. In this study we estimate global greenhouse (GHG) emissions due to synthetic N fertiliser manufacture, transportation, and field use in agricultural systems. By developing the largest field-level dataset available on N2O soil emissions we estimate national, regional and global N2O direct emission factors (EFs), while we retrieve from the literature the EFs for indirect N2O soil emissions, and for N fertiliser manufacturing and transportation. We find that the synthetic N fertiliser supply chain was responsible for estimated emissions of 1.25 GtCO2e in 2018, representing 21.5% of agriculture direct emissions and 2.4% of global GHG emissions. Synthetic N fertiliser production accounted for 35.2% of total synthetic N fertiliser-associated emissions, while field emissions accounted for 62.4% and transportation accounted for the remaining 2.4%.The top four emitters together, China, India, USA and EU28 accounted for 63% of the total. Historical trends reveal the great disparity in total and per capita N use and efficiency in regional food production. Reducing overall production and use of synthetic N fertilisers offers large mitigation potential and in many cases realisable potential to reduce emissions.
World War II Effects on Prevalence and Pattern of Multimorbidity in Older Adults: Results From the KORA-Age Study
Authors: Arshadipour Ava , Thorand Barbara , Linkohr Birgit , Rospleszcz Susanne , Ladwig karl-heinz , Heier Margit , Peters Annette
Published: October 2021

BackgroundWhile risk factors for age-related diseases may increase multimorbidity (MM), early life deprivation may also accelerate the development of chronic diseases and MM.MethodsThis study explores the prevalence and pattern of MM in 65-71 year-old individuals born before, during, and after World War II in Southern Germany based on two KORA (Cooperative Health Research in the Region of Augsburg) -Age studies. MM was defined as having at least two chronic diseases, and birth periods were classified into five phases: pre-war, early war, late war, famine, and after the famine period. Logistic regression models were used to analyze the effect of the birth phases on MM with adjustment for sociodemographic and lifestyle risk factors. Furthermore, we used agglomerative hierarchical clustering to investigate the co-occurrence of diseases.ResultsParticipants born during the late war phase had the highest prevalence of MM (62.2%) and single chronic diseases compared to participants born during the other phases. Being born in the late war phase was significantly associated with a higher odds of MM (OR = 1.83, 95% CI: 1.15-2.91) after adjustment for sociodemographic and lifestyle factors. In women, the prevalence of joint, gastrointestinal, eye diseases, and anxiety was higher, while heart disease, stroke, and diabetes were more common in men. Moreover, three main chronic disease clusters responsible for the observed associations were identified: joint and psychosomatic, cardiometabolic and, internal organs diseases.ConclusionsOur findings imply that adverse early-life exposure may increase the risk of MM in adults aged 65-71 years. Moreover, identified disease clusters are not coincidental and require more investigation.
The Effect of Volume Controlled and Pressure Controlled Ventilation Modes on Cerebral Oximetry and Blood Gas Status in Laparoscopic Cholecystectomy, A Randomized Controlled Trial
Authors: Badur Emre , Altınay Mustafa , Sayın Pınar , Çınar Ayşe Surhan , türkoğlu leyla , yücel tuğba
Published: October 2021

Background: To compare the volume-controlled and pressure-controlled ventilation modes with near infrared spectroscopy (NIRS) cerebral oximetry and blood gas status in laparoscopic cholecystectomyMethods: Seventy patients (n=70), who underwent elective laparoscopic cholecystectomy operation were randomized into two groups (volume control ventilation - group V, pressure control ventilation - group P). Demographic data (age, gender, body mass index) and operative data (anesthesia, surgery, and insufflation durations) were recorded. Patients’ single derivation electrocardiogram, pulse oximetry, non-invasive arterial pressure, NIRS cerebral oximetry and end-tidal CO2 parameters were recorded. Measurements were done at the start of anesthesia (T0), at the end of intubation (T1), 5 minutes after the insufflation (T2), at the time just before desufflation (T3) and 5 minutes after desufflation (T4).The patients’ heart rate, systolic and diastolic arterial pressure, saturation of pulse oximetry, and NIRS values were recorded for time points. Additionally, arterial gas results and mechanical ventilation parameters were recorded as well. Results: No significant difference was found in age, sex, body mass index. Operation, anesthesia and insufflation durations were similar for the groups. In Group P, NIRS right T1-2-3 averages and NIRS left T2-3 averages were significantly higher than Group V (p=0.030, p=0.001, p=0.001, p=0.006, p=0.002 respectively). In Group P T1-T2-T4, mean peak pressures and mean plateau pressures were significantly lower than Group V (p=0.003, p=0.001, p<0.001, p=0.011, p=0.001, p<0.001 respectively).Conclusion: Mechanical ventilation that performed in pressure-control ventilation mode is resulted with better tissue oxygenation than volume-control ventilation mode. In pressure-control ventilation mode, peak pressure and plateau pressure were lower.Registration of study at ClinicalTrials.gov was made at 25/01/2021 with the NCT04723043 number.