bluuebunny/crossref_metadata_2025 huggingface dataset:
Aplicación de modelo ARCH para estimar un intervalo del valor del bitcóin
Authors: Argueta Bermúdez Franklin Iván , Humberstone Morales James Edward
Published: June 2022

Desde septiembre de 2021, El Salvador se convirtió en el primer país en adoptar bitcóin como moneda de curso legal, la cual podrá ser utilizada como un instrumento de inversión. La volatilidad del valor del bitcóin es un riesgo que debe asumir el inversionista; pero a la vez abre las puertas para realizar trading. Sin embargo, hacer trading requiere conocimiento de múltiples técnicas para el análisis del mercado bursátil, y de la ejecución de una estrategia para las operaciones de compra y venta en el momento oportuno. Según las encuestas realizadas por universidades privadas del país, la población desconoce sobre el bitcóin y por consiguiente cómo invertir en él. Ante esta situación, este estudio discute la creación de un modelo matemático para estimar el intervalo del precio del bitcóin, con la finalidad de que los salvadoreños identifiquen los valores óptimos con los que puede operar para obtener un beneficio.
Clasificación de las tecnologías de acceso remoto para el teletrabajo en PYME
Authors: Cuchillac Víctor Miguel
Published: June 2022

Dado lo abrupto del confinamiento ocurrido en 2020 provocado por la pandemia COVID-19, muchas organizaciones tuvieron que suspender sus actividades, salvo aquellas que contaban con una infraestructura tecnológica o con los recursos informáticos que permitieran el teletrabajo. También en respuesta a esta situación, se da una eclosión de nuevas tecnologías para facilitar el acceso a los recursos informáticos de las organizaciones (bases de datos, aplicativos contables, software de gestión de procesos, etc.), dificultando así la selección de las mejores opciones para las micro y pequeñas empresas, las cuales poseen un presupuesto menor para la inversión en tecnología, y poco personal bien capacitado para evaluar las tecnologías e implementar la más conveniente a la organización. En ese contexto, esta investigación busca: proveer las pautas para que una empresa pueda implementar el acceso remoto como una estrategia al teletrabajo, y crear una clasificación de los esquemas disponibles para el acceso a los recursos informáticos de la organización que facilite la selección del mejor esquema. Para lograr esto, se listaron varias tecnologías recomendadas por los estudiantes de la Maestría en Informática Aplicada a Redes, y se crearon listas de características o parámetros para la evaluación de las tecnologías seleccionadas. Posteriormente se crearon escenarios de prueba por los egresados de la carrera en Ingeniería en Sistemas y Computación. Como resultado, se listan las consideraciones que las PYME deben tener a la hora de implementar tecnologías para el teletrabajo, y una clasificación de cinco esquemas o modelos tecnológicos para el acceso a los equipos o las aplicaciones que se encuentran dentro de la organización, proponiendo además las tecnologías para micro, pequeñas y medianas empresas salvadoreñas.
La respuesta política al COVID-19 en Centroamérica: El Salvador, Nicaragua y Costa Rica
Authors: Rodríguez Pacas Fátima Guadalupe
Published: June 2022

Este manuscrito tiene como objetivo generar una investigación comparativa inicial, pero coherente, de la capacidad de respuesta política al COVID-19 adoptada por tres países centroamericanos (El Salvador, Nicaragua y Costa Rica), durante los primeros meses de la crisis en 2020. Los hallazgos ilustran la conexión entre implementación de medidas, orden público e institucional y la toma de decisiones, las diferencias y similitudes entre países. Finalmente, se enfatiza la conexión entre las medidas adoptadas y las estructuras políticas del siglo pasado donde El Salvador respondía al principio de desarrollo de progreso, Nicaragua de libertad y Costa Rica de democracia, según lo establecido por Jeffrey Paige (1997).
Calidad del servicio de recolección de residuos sólidos: Caso de la Colonia Quezaltepec, Santa Tecla
Authors: Iraheta Argueta Walter Alonso
Published: June 2022

En este estudio se indaga la calidad del servicio de recolección de residuos sólidos urbanos (RSU), percibido en la colonia Quezaltepec, municipio de Santa Tecla. Para medir la calidad del servicio de residuos sólidos se ha rescatado la percepción y experiencias de los usuarios de dicha localidad. El soporte teórico y metodológico de esta investigación es una adaptación del modelo SERVPERF, mediante el cual se midieron las percepciones de calidad del servicio de recolección de residuos sólidos, según los usuarios de esta localidad. Los resultados indican que el nivel de calidad del servicio de recolección de residuos sólidos percibido por los usuarios es favorable en la dimensión de elementos tangibles, seguridad, empatía y la conciencia ambiental; mientras que la confiabilidad y la capacidad de respuesta son percibidas de forma negativa. Metodológicamente, este estudio proporciona una escala de medición fiable y válida que puede ser utilizada en otros estudios.
Nayib Bukele, el bukelismo y el uso de la religión
Authors: Aguilar Vásquez Luis Eduardo
Published: June 2022

Se describe como el presidente Bukele y sus seguidores entienden la religión, y cómo esto fortalece la democracia o el autoritarismo.
Delaware: modelo exitoso de derecho societario en Estados Unidos de América
Authors: Lupián Morfín Gerardo Enrique
Published: June 2022

El Estado de los EE.UU. que ha atraído un mayor número de empresas en su territorio ha sido Delaware y se considera que las mayores empresas estadounidenses se rigen por el derecho societario innovador y pionero del Estado de Delaware, aunque no tengan allí más que una dirección postal.
Youth throwing athletes do not show bilateral differences in medial elbow width or flexor tendon thickness
Authors: Morrow Rudolph M. , McIlvian Gary E. , Johnson Jenifer , Timmons Mark K.
Published: June 2022

Background: Medial elbow laxity develops in throwing athletes due to valgus forces. Medial elbow instability in professional, collegiate, and high school athletes is well documented; however, the medial elbow of young throwing athletes has received less attention. This study investigated the medial elbow and common flexor tendon during applied elbow valgus stress of youth baseball players.Methods: The study included 15 participants. The medial elbow width and thickness of the common flexor tendon were measured on ultrasound images.Results: No significant side differences in medial elbow width or common flexor tendon were found at rest or under applied valgus stress. At rest, the medial elbow joint width was 3.34±0.94 mm on the dominant side and 3.42±0.86 mm on the non-dominant side. The dominant side increased to 3.83±1.02 mm with applied valgus stress, and the non-dominant side increased to 3.96±1.04 mm. The mean flexor tendon thickness was 3.89±0.63 mm on the dominant side and 4.02±0.70 mm on the non-dominant side.Conclusions: These findings differ from similar studies in older throwing athletes, likely because of the lack of accumulated stress on the medial elbow of youth throwing athletes. Maintaining elbow stability in young throwing athletes is a vital step to preventing injury later in their careers.
Performance of a Compact Solar Collector
Authors: Enrique Barrera-Calva  , Joaquin-Alfredo Velázquez-Olvera  , Stephanía Velázquez-Olvera  , David Palomino-Merino  , Eder Contreras-Gallegos  , Eder Contreras-Gallegos  , Alfredo Cruz-Orea
Published: June 2022

One of the main uses of energy is the heating of fluids, mainly water and air. In the residential and industrial sectors, energy applications are diverse, mainly; Prepared food, washing clothes and personal hygiene, as well as the generation of steam and heat to process. The solar collectors represented an excellent sustainable alternative to cover the needs of these sectors. In Mexico there is a diverse market of brands and solar equipment, mostly of foreign origin. But those manufactured in our country. With selective coatings, such as titanium oxide, they are imported, and the substances and processes used are highly toxic and harmful to the environment. Given this, selective organic coatings represent an excellent alternative. It is important to increase the thermal efficiency of the solar collectors, as well as to improve the heat transfer in a thermal tank. For all the above, this research proposes a solar collector for 15 liters of water with organic selective coating and the support of a heat exchanger with nano fluid. So far, the best results are: thermal efficiency of 0.58 with a 0.1% concentration of ZnO nano fluid, thermal efficiency of 0.6 with a concentration of 0.1% ZnCuO nano fluid and thermal efficiency of 0.63 with a concentration of 0.1% CuO nano fluid.

 

Uma das principais utilizações da energia é o aquecimento de fluidos, principalmente água e ar. Nos sectores residencial e industrial, as aplicações energéticas são diversas, principalmente; alimentos preparados, lavagem de roupa e higiene pessoal, bem como a geração de vapor e calor para processar. Os colectores solares representaram uma excelente alternativa sustentável para cobrir as necessidades destes sectores. No México existe um mercado diversificado de marcas e equipamentos solares, na sua maioria de origem estrangeira. Mas aqueles fabricados no nosso país. Com revestimentos selectivos, tais como óxido de titânio, são importados, e as substâncias e processos utilizados são altamente tóxicos e prejudiciais para o ambiente. Por isso, os revestimentos orgânicos selectivos representam uma excelente alternativa. É importante aumentar a eficiência térmica dos colectores solares, bem como melhorar a transferência de calor num tanque térmico. Por tudo isto, esta investigação propõe um colector solar para 15 litros de água com revestimento orgânico selectivo e o apoio de um permutador de calor com nanofluido. Até agora, os melhores resultados são: eficiência térmica de 0,58 com uma concentração de 0,1% de ZnO nano fluido, eficiência térmica de 0,6 com uma concentração de 0,1% de ZnCuO nano fluido e eficiência térmica de 0,63 com uma concentração de 0,1% de CuO nano fluido.
Fundamentos de la vacuna Cansino
Authors: Jorge Arturo Reyes Bonilla
Published: June 2022

La vacuna Cansino al igual que la Sputnik V se basa en la utilización de vectores no replicantes de adenovirus; éstos pertenecen al Grupo I de la clasificación de Baltimore. En condiciones naturales en el  proceso de  replicación de un adenovirus, el ADN viral pasa al núcleo y utiliza la maquinaria celular, no se integra al genoma celular, produce un ARN temprano para producir las proteínas para la replicación y uno tardío para las proteínas de la cápside. La vacuna de  CanSino Biologics consiste de adenovirus vectorizado no replicante tipo-5 (Ad5). De acuerdo a un documento del gobierno de México la vacuna Cansino no contiene adyuvantes, ni conservadores, y tiene una eficacia general de 68.83% para la prevención de todas las infecciones sintomáticas de COVID-19 y una eficiencia del 95.47% para la prevención de enfermedad grave 14 días después  de la vacunación.

 

The Cansino vaccine, like Sputnik V, is based on the use of non-replicating adenovirus vectors; these belong to Group I of the Baltimore classification. Under natural conditions in the replication process of an adenovirus, the viral DNA passes into the nucleus and uses the cellular machinery, it does not integrate into the cellular genome, it produces an early RNA to generate the proteins for replication and a late one for the proteins of the capsid. CanSino Biologics vaccine consists of vectorized non-replicating adenovirus type-5 (Ad5). According to a document from the Mexican government, the Cansino vaccine does not contain adjuvants or preservatives, and has a general efficacy of 68.83% for the prevention of all symptomatic COVID-19 infections and an efficiency of 95.47% for the prevention of disease severe 14 days after vaccination
Modelo de predicción de los resultados de la prueba icfes saber 11 en el área de matemáticas a partir de variables socioeconómicas
Authors: Yamile Peña Lozano  , José John Fredy González Veloza
Published: June 2022

Con base en la encuesta realizada al momento de la inscripción de los estudiantes para la prueba ICFES Saber 11 y los resultados obtenidos en la prueba de matemáticas, se busca generar un modelo de predicción de los resultados a partir de las condiciones socioeconómicas de los estudiantes que presentarán este examen. Históricamente, en Colombia, El Instituto Colombiano para la Evaluación de la Educación, anteriormente “Instituto Colombiano para el Fomento de la Educación Superior” lleva a cabo la aplicación de pruebas de desempeño académico a nivel nacional, por medio de la cuál es posible realizar mediciones de las capacidades de los estudiantes, en algunas competencias académicas, buscando establecer el nivel educativo de cada estudiante.  Desarrollar un modelo predictivo para esta prueba, se utiliza la base de datos de los estudiantes que presentaron la prueba en 2020 analizando las variables género, estrato, número de personas que conforman el hogar, educación de la madre, acceso a Internet, disponibilidad de computadora en el hogar, horas de trabajo semanal del estudiante, naturaleza de la Institución Educativa, área de ubicación geográfica de la Institución Educativa y el puntaje de la prueba en matemáticas.  Se realiza la predicción mediante las técnicas de Machine Learning y el modelo LightGBM con la ayuda del paquete PyCaret de Python, obteniendo como variable más significativa el acceso a internet con un MAPE de 0.1741, un MAE de 8.0244 y un R2 de 0.2049 entre sus principales métricas. 

 

Based on the survey carried out at the time of enrollment of the students for the ICFES Saber 11 test and the results obtained in the mathematics test, the aim is to generate a prediction model of the results based on the socioeconomic conditions of the students who they will take this exam. Historically, in Colombia, the Colombian Institute for the Evaluation of Education, formerly "Colombian Institute for the Promotion of Higher Education", carries out the application of academic performance tests at the national level, through which it is possible to make measurements of the capacities of the students, in some academic competitions, seeking to establish the educational level of each student. To develop a predictive model for this test, the database of students who took the test in 2020 is used, analyzing the variables gender, stratum, number of people who make up the household, mother's education, Internet access, computer availability at home, weekly work hours of the student, nature of the Educational Institution, geographic location area of ​​the Educational Institution and the score of the test in mathematics. The prediction is performed using Machine Learning techniques and the LightGBM model with the help of the PyCaret Python package, obtaining as the most significant variable internet access with a MAPE of 0.1741, an MAE of 8.0244 and an R2 of 0.2049 among its main variables. metrics.
Time variation of atmospheric pollutants in first weeks of COVID-19 lockdown in the Metropolitan Region of Rio de Janeiro
Authors: Karmel Beringui  , Elizanne P. S. Justo  , Ana Carolina L. Bellot de Almeida  , Luciana M. Baptista Ventura  , Michelle Branco Ramos  , Ruan G. de Souza Gomes  , Pedro H. R. Valle  , Adriana Gioda
Published: June 2022

This study aims to assess the COVID-19 partial lockdown influence on air quality in the Metropolitan Region Rio de Janeiro (MRRJ). Criteria pollutants (CO, SO2, O3, and NO2) sampled at four sites under vehicular and industrial influences were investigated, between March 1st to April 12th, 2019 and 2020. Results showed that the partial lockdown affected pollutant levels through emission sources reduction. High decreased concentrations were observed for SO2, NO2, and CO; while an increase in the ozone concentration was recorded. Pollutant time variation evaluations helped to understand the trend and sources in the different periods.

 

Este estudo tem como objetivo avaliar a influência do lockdown parcial da COVID-19 na qualidade do ar na Região Metropolitana do Rio de Janeiro (RMRJ). Poluentes de critérios (CO, SO2, O3 e NO2) amostrados em quatro locais sob influências veiculares e industriais foram investigados, entre 1º de março e 12 de abril de 2019 e 2020. Os resultados mostraram que o bloqueio parcial afetou os níveis de poluentes por meio da redução das fontes de emissão. Reduções nas concentrações de SO2, NO2 e CO foram registradas; enquanto um aumento na concentração de ozônio foi observado. As avaliações da variação temporal dos poluentes ajudaram a entender a tendência e as fontes nos diferentes períodos.
Modelagem matemática e inclusão social: experiências vividas no PIBIS
Authors: Zontini Laynara dos Reis Santos , Burak Dionísio
Published: June 2022

Nesse texto tratamos de explicitar as contribuições da Modelagem Matemática na Educação Matemática, segundo a perspectiva de Burak, no Programa de Bolsas Acadêmicas de Inclusão Social (PIBIS), trazendo uma descrição reflexiva de um projeto realizado no Instituto Federal do Paraná campus Irati. Apresentamos aqui uma investigação qualitativa, pautada nas observações sobre o projeto desenvolvido, onde trabalhamos com o fenômeno a Modelagem Matemática no PIBIS, perguntando pelas contribuições dessa metodologia no cumprimento dos objetivos do programa. No projeto, os estudantes bolsistas partiram do tema de mobilidade e acesso ao campus, uma situação que afeta estudantes e servidores do campus, com isso buscaram pesquisar modos de resolver os problemas observados. Os dados obtidos foram analisados criticamente tendo como produção final relatórios enviados à empresa de transporte público e aos candidatos a prefeito no município. A partir desse projeto, discutimos a questão do interesse como aspecto central da atividade, que possibilitou resultados que extrapolam os conhecimentos matemáticos adquiridos pelos estudantes, contribuindo também com a permanência dos mesmos na instituição.
Sostenibilidad empresarial su aplicación en las pymes agrícolas
Authors: Alexandra Plua Panta Karina , Amhed León Tellez Ibrahin , Rocio Reyes Bermeo Mariana del , Eugenia Álvarez Perdomo Patria
Published: June 2022

La sostenibilidad en el ámbito empresarial conocido como "triple bottom-line", término que se traduce con el nombre de triple sostenibilidad e implica contabilizar y evaluar el potencial de recursos de la empresa considerando el desempeño social, económico y ambiental este enfoque  permite crear valor a largo plazo en las empresas; por lo tanto, es necesario determinar cuáles son los modelos y sistema de indicadores que están siendo aplicados para evaluar la sostenibilidad de las PYMES ecuatorianas en función de sus características específicas. El ensayo se fundamenta en una revisión bibliográfica exhaustiva del concepto de sostenibilidad empresarial y su aplicación; lo cual, permitió generar una relación de los principales hallazgos encontrados en la literatura sobre los modelos y los sistemas de indicadores que permiten evaluar la sostenibilidad empresarial; información importante para la toma de decisiones; encontrándose que, en Ecuador estos, están siendo escasamente aplicados en las empresas de carácter agrícola, lo que conlleva a determinar que es necesario buscar estrategias y modelos de evaluación que se adapten a las características específicas de estas pequeñas y medianas empresas, considerando que son actores indispensables en el crecimiento económico del país.
Influencia del suelo como material de cobertura y contenido de compuestos lignocelulósicos en la biodegradación de residuos sólidos urbanos en rellenos clausurados
Authors: Buenrostro-Delgado Otoniel , Israde-Alcántara Isabel , López-Granados Erna Martha
Published: June 2022

La fracción orgánica (FO) continúa siendo el componente mayoritario de los residuos sólidos urbanos (RSU) en México y la mayoría de países en desarrollo. La creciente generación de RSU y la disposición adecuada de éstos, representan un reto para las autoridades por los costos económicos y ambientales que implican los periodos prolongados para su estabilización en los sitios de confinamiento. Este estudio evaluó la biodegradación analizando la composición, temperatura, pH, humedad, sólidos volátiles (SV), y biodegradabilidad determinando compuestos lignocelulósicos (lignina y de celulosa + hemicelulosa) de los RSU confinados en un relleno sanitario clausurado con cobertura de material de suelo. Los resultados indican una heterogeneidad en la composición de los RSU, una alta proporción de FO (~78%), y diferentes estados de degradación de ésta. Los datos de la temperatura, pH, humedad y SV indican que las condiciones de confinamiento no promueven el óptimo desarrollo de los consorcios microbianos que degradan la FO. Los contenidos de compuestos lignocelulósicos sugieren una baja biodegradabilidad de la FO, confirmada por correlaciones inversas entre el contenido lignocelulósico y SV. El uso del suelo como material de cobertura permite variaciones considerables en parámetros fisicoquímicos cruciales que combinados con contenidos altos de compuestos lignocelulósicos, conducen a bajas tasas de biodegradación y un tiempo de estabilización prolongado de los RSU confinados en estos sitios. Los resultados de este estudio son importantes en la toma de decisiones para reducir el tiempo de estabilización de la materia orgánica y los costos de operación y post-clausura en los sitios de confinamiento de RSU.
O apanhador de memórias: a história de Macapá nas crônicas de Alcinéa Cavalcante e Fernando Canto
Authors: Melo Luiza Nobre de Menezes , Scheibe Roberta
Published: June 2022

A discussão a seguir se debruça sobre a relação da memória individual e o espaço da cidade de Macapá, e de que forma isso é subjetivado na escrita e na figura do cronista. A pesquisa tem como objetivo analisar as narrativas textuais construídas ao longo das trajetórias de vida dos jornalistas amapaenses Alcinéa Cavalcante e Fernando Canto; e através disso, compreender de que forma os personagens reconstroem suas histórias, práticas sociais, memórias e resistências nos depoimentos e recursos narrativos emitidos em produções dos mesmos. Para tal análise, fez-se a seleção de textos publicados nos blogs “Canto da Amazônia” e “Alcinéa Cavalcante”, pertencentes aos respectivos perfilados.
Microencapsulated biofertilizer formulation: product development and effect on growth of green pepper seedlings
Authors: Stamenković Stojanović Sandra , Karabegović Ivana , Danilović Bojana , Nedović Viktor , Kalušević Ana , Mančić Stojan , Lazić Midrag
Published: June 2022

Aim of the study: This study aimed to formulate a novel, commercially applicable biofertilizer, to optimize the microencapsulation procedure of Bacillus subtilis NCIM 2063 and examine the stability and phytostimulatory effects of obtained formulation.
Area of the study: Southestern Serbia.
Material and methods: Microbial powder formulations were prepared using spray drying with maltodextrin as a carrier. The spray drying conditions were set according to Box-Benkhen experimental desing. The effect of the formulation was tested on green pepper (Capsicum annuum) seeds in controled conditions.
Main results: Response surface models were developed. All of the models were statistically significant, adequately fitted and reproducible. The maximum achieved values of viability and yield in a formulation were 1.99·109 CFU/g and 96.8%, respectively, whilst the driest formulation had 1.44% moisture. The following optimum conditions were proposed for the spray drying procedure: an inlet air temperature of 133 °C, maltodextrin concentration of 50 g/L and a feed flow rate of 6.5 mL/min. The obtained microbial formulation had a high survival rate after being stored at room temperature over a 1--year period. Its application on green pepper seeds had beneficial effect on plant height, leaf dry weight and chlorophyll content of the seedlings.
Research highlights: B. subtilis was successfully microencapsulated on maltodextrin as a carrier. Interaction effects between the process variables were fully explained and statistically significant models were developed. In addition to biocontrol properties formulation had a phytostimulatory effect, excellent stability and satisfactory physical properties.
Complex flows, escape to infinity and a question of Rubel
Authors: Langley James K.
Published: June 2022

Let \(f\) be a transcendental entire function. It was shown in a previous paper (2017) that the holomorphic flow \(\dot z = f(z)\) always has infinitely many trajectories tending to infinity in finite time. It will be proved here that such trajectories are in a certain sense rare, although an example will be given to show that there can be uncountably many. In contrast, for the classical antiholomorphic flow \(\dot z = \bar f(z)\), such trajectories need not exist at all, although they must if \(f\) belongs to the Eremenko-Lyubich class \(\mathcal{B}\). It is also shown that for transcendental entire \(f\) in \(\mathcal{B}\) there exists a path tending to infinity on which \(f\) and all its derivatives tend to infinity, thus affirming a conjecture of Rubel for this class.
Comparison of excision, swabbing and meat fluid sampling techniques on the prevalence and detection of Salmonella from beef in Namibia
Authors:   Ministry of Agriculture, Water and Forestry, Shilangale R P , Chimwamurombe P M ,   University of Namibia
Published: June 2022

Salmonellabacteria cause major challenges in food production and public health because of their ability to cause foodborne disease known as salmonellosis. The microbiological safety of food can be ensured through routine surveillance programs with a view to detect the presence of pathogenic bacteria such as Salmonella. However, the rate of Salmonelladetection in food may be affected by the sampling technique used leaving the product unsafe for human consumption. In order to assess the effectiveness of sampling techniques for Salmonelladetection, atotal of 9508 of beef samples were collected from the local slaughter houses over a period of two years starting from January 2008 to December 2009. Samples used were routine samples collected using three different sampling techniques; excision, swabbing and meat fluid.Samples were pre-enriched in Buffered Peptone Water followed by enrichment in the Rappaport Vissiliadis and Selenite Cystine broths. The isolation of Salmonellawas done on Xylose Lysine Desoxycholate and Brilliant Green agars followed by biochemical confirmation and serotyping according to Kauffman-White scheme. The statistical analysis by Chi square showed that there was a significant difference (p <0.05) on the prevalence of Salmonellabetween the swabbing sampling techniques (2.67 %) with excision (0.50 %) and meat fluid (0.43 %) sampling technique.However, there was no significant difference (p > 0.05) between the excision and meat fluid sampling techniques. The findings suggest that the three samplingtechniques could produce different results when used for sampling beef for Salmonella detection. The swabbing sampling technique showed a higher detection rate of Salmonellaand could be the best choice as compared to other techniques. The significant detection rate of the swabbing sampling technique as compared to other techniques could probably be due to the large surface area employed in this technique as a result of uneven distribution of microorganisms.
Radon, Salinity and Elemental Concentrations of Water Sources within the Kuiseb and Cuvelai-Etosha Basin, Namibia
Authors:   Namibia University of Science and Technology, Ithindi J , Kgabi N ,   Namibia University of Science and Technology, Atekwana E ,   Oklahoma State University, Mathuthu M ,   North-West University, Kalumbu G ,   Namibia University of Science and Technology, Motsei L ,   North-West University, Tshivhase V ,   North-West University
Published: June 2022

The absence of baseline information on radon measurements and concerns about possible consequences of long term exposure to high radon (Rn-222) concentrations and its progenies necessitated for the evaluation of radon concentrations in boreholes and households. This study thus investigated the levels of Radon gas (Rn-222), salinity and elemental composition of different water sources (tap-water, boreholesand surface water) within the Kuiseb and Cuvelai-Etosha basin, in order to address the lack of scientific correlational studies on radon levels and toxic trace elements in drinking water. Radon concentrations were measured using an AlphaGRAUD PQ2000 PRO system, and the elemental composition was determined using a NexION 350D Inductively Coupled Plasma Mass Spectrometer. The findings of this study showed high (2.71 Bq/m3) Rn-222concentrations in the Kuiseb (possibly caused by natural uranium ore deposits in the Erongo Region) compared to the 0.43 Bq/m3average in the Cuvelai-Etosha Basin. The study also measured high salinity (63 0/00) concentrations (linked to high Total Dissolved Solids of 25.46 g/L) in the Cuvelai waters compared to the (37 0/00) salinity (with low TDS of 3.8 g/L) in the Kuiseb, thus pointing to the geological and meteorological make up of Cuvelai i.e. Kalahari sedimentary rocks, runoff sediments, high temperature and evaporation rates, as well as alternating floods and drought (rainfall variations). The elements observed in significantly high concentrations include Ba, K, Sb, As, Cd, Cr, Cu, Mo, Ni, V, Zn and Bi in the Kuiseb, and Ca, Cl, Mg, Na, Al, Be, Br, Ce, Cs, Fe, Pb, Mn, Se, Ti in the Cuvelai-Etosha Basin. Further, the Cuvelai-Etosha proved to have more anthropogenic activities (including burning of vegetation) influencing the elemental composition, and causing deterioration of the water quality.
Kiến thức và thực hành tự chăm sóc của người bệnh lao điều trị ngoại trú tại Bệnh viện Đa khoa thành phố Thái Bình sau giáo dục sức khoẻ
Authors: Trương Thị Thắm , Vũ Văn Thành
Published: June 2022

Mục tiêu: (1). Mô tả thực trạng kiến thức và thực hành tự chăm sóc của người bệnh Lao điều trị ngoại trú tại Bệnh viện Đa khoa Thành phố Thái Bình năm 2021; (2). Đánh giá thay đổi kiến thức và thực hành tự chăm sóc của người bệnh Lao điều trị ngoại trú tại Bệnh viện Đa khoa Thành phố Thái Bình sau giáo dục sức khỏe.
Đối tượng và phương pháp nghiên cứu: Nghiên cứu can thiệp giáo dục sức khoẻ có so sánh trước – sau trên 115 người mắc bệnh lao điều trị ở giai đoạn củng cố đang được theo dõi và quản lý tại phòng khám ngoại trú Bệnh viện Đa khoa Thành phố Thái Bình từ tháng 3 đến tháng 5 năm 2021 bằng bộ công cụ chuẩn bị trước.
Kết quả: Điểm trung bình kiến thức về bệnh của người bệnh tăng từ 8,8 ± 1,7 lên 12,5 ± 1,2; 12,1 ± 1,6 trên tổng điểm là 18. Điểm trung bình kiến thức về thuốc tăng từ 5,4 ± 1,6, 10,9 ± 1,08, 10,9 ± 1,6 trên tổng điểm 16. Điểm trung bình kiến thức về điều trị tăng 5,4 ± 1,6 lên 10,1 ± 0,8 và 7,1 ± 1,62 trên tổng điểm 12. Điểm trung bình về thực hành tự chăm sóc tăng từ 14,1 ± 1,3 lên 22,1 ± 1,3 và 19,4 ± 1,7 trên tổng điểm là 36 sau 1 và 2 tháng sau giáo dục sức khoẻ. Thay đổi điểm kiến thức, thực hành trước và sau giáo dục sức khỏe khác biệt có ý nghĩa thống kê với p < 0,01.
Kết luận: Kiến thức về bệnh, sử dụng thuốc, điều trị và thực hành tự chăm sóc của người bệnh lao phổi còn hạn chế trước can thiệp giáo dục sức khỏe. Sau giáo dục sức khỏe các chỉ số trên được cải thiện rõ rệt; điều này cho thấy hiệu quả của can thiệp trong việc nâng cao kiến thức và thực hành cho người bệnh mắc lao phổi.
Kiến thức và thực hành về bệnh sán lá gan nhỏ của người dân tại xã Nghĩa Hồng, Nghĩa Hưng, Nam Định
Authors: Vũ Văn Thành , Hoàng Thị Hòa , Đỗ Thị Thùy Dung
Published: June 2022

Mục tiêu: Mô tả kiến thức, thực hành về bệnh sán lá gan nhỏ của người dân xã Nghĩa Hồng, Nghĩa Hưng, Nam Định.
Đối tượng và phương pháp nghiên cứu: Nghiên cứu mô tả cắt ngang trên 200 người dân tại địa điểm nghiên cứu từ tháng 8 đến tháng 10 năm 2020.
Kết quả: Tỷ lệ người dân biết được nguyên nhân gây bệnh sán lá gan nhỏ chiếm 86,5%, tỷ lệ người dân trả lời đúng được vật chủ chính chiếm 53,5%, 61% người dân được hỏi biết 1 tác hại của bệnh, biết trên 2 tác hại chiếm 18,5%, trên 3 tác hại chiếm 20,5%. Tỷ lệ người dân đã từng ăn gỏi cá/cá chưa nấu chín chiếm 54%: trong đó 58,3% ăn trong vòng 3 tháng, 18,5% ăn từ hơn 1 năm trước,13% ăn trong vòng 6-12 tháng, 10,2% đã từng ăn trong vòng 6 tháng. 100% hộ gia đình đều sử dụng nhà vệ sinh tự hoại.
Kết luận: Người dân tại xã có kiến thức khá cao về bệnh sán lá gan nhỏ và tỷ lệ nhiễm trứng sán lá gan nhỏ chỉ 1,5% nhưng trên thực tế 54% người dân vẫn chưa bỏ được thói quen ăn gỏi cá/cá chưa chín.
Rethinking Risk Culture in a Post-pandemic Era
Authors:   Risk Management, Ghana Export-Import Bank, Accra, Ghana, Tagoe Nii Ardey
Published: June 2022

The COVID-19 pandemic has taught us the need to rethink towards future risk and possibly how to mitigate or deal with such risk. To do this, the right risk culture needs to be embedded into the organization’s setting. In recent times, there has been an increase in regulatory pressure for effective risk management governance and strategy. An inspiring risk governance and strategy will never be realized without the backing of a strong risk culture.Thispaperdiscussesriskculturewithinanorganizationandrethinkingriskcultureinapost-pandemicera.
A Formative Evaluation with Extension Educators: Exploring Implementation Approaches Using Web-based Methods
Authors: Duke Adrienne M. , Maxwell Scott Shnovia Joy
Published: June 2022

The article describes the formative evaluation of a bullying prevention program called Be SAFE from the perspective of Extension educators. Twelve regional and county educators from Family and Child Development and 4-H Youth Development participated in our study. We used a web-based, mixed methods approach, utilizing both Qualtrics, an online survey software platform, and Scopia, a video conferencing application, to collect survey data and do a focus group. The results of the survey show that three activities, Clear Mind, Mud Mind, Take a Stand, and The Relationship Continuum, were perceived as garnering the most participation from students. However, focus group data indicated that while there was often a high level of participation, the subject matter of the curriculum was too advanced for students in the fifth grade and that classroom size affected how well educators could teach lessons. Furthermore, school access was not an implementation challenge, but the amount of days available to implement the full curriculum was sometimes limited. The data collected through this formative evaluation were used to improve implementation efforts. The process outlined in this article can be used as a model to help program leaders who are interested in using web-based tools to evaluate implementation processes.
Assessing the Tennessee Extension Master Gardener Program Using Both County Coordinator and Extension Volunteer Perspectives
Authors: Bumgarner Natalie R. , Donaldson Joseph L.
Published: June 2022

The Extension Master Gardener (EMG) program is a vital contributor to Tennessee Extension residential and consumer horticulture education and outreach. In 2014, 2,480 volunteers statewide completed service and education requirements to achieve or maintain certified EMG status. These volunteers, led by Tennessee Extension agent county coordinators, contributed over 178,800 hours of service while recording over 30,300 hours of continuing education. These totals illustrate both the contributions of EMG volunteers to horticulture outreach and their desire for education to enhance their own knowledge and skill. Understanding the most needed areas of training for EMG volunteers to support their education and outreach to residents is critical to the growth and impact of the program. Therefore, a study was undertaken in 2015 to survey both EMG volunteers and coordinators to determine educational needs for volunteers as well as the preferred training delivery methods. Respondents consistently rated horticultural training in edible and ornamental crops as well as pest and disease management as high priorities. Similarly, hands-on and in-person presentations and printed materials were rated as highly important training methods. Results indicate potential training priorities for the future but also suggest a need to explore differences between coordinator and volunteer perspectives in some areas.
GÜVENLİK EĞİTİMİ VE GÜVENLİK FARKINDALIĞININ HİZMET SABOTAJI ÜZERİNE ETKİSİNDE GÜVENLİK ÖNCELİĞİNİN ARACI ROLÜ
Authors: MERDAN Ethem
Published: June 2022

Güvenlik konusu, iş kazalarının ve yaralanmalarının sıklıkla yaşandığı örgütlerde giderek önemini artırmaktadır. Örgütler iş kazası ve yaralanmalarını azaltmak, gerçekleşebilecek durumları önlemek için güvenlik eğitimine daha fazla yer vermişlerdir. Aksi halde örgütlerde yaşanacak bir kaza nedeniyle verilecek hizmetlerde aksamalar olabilir. Ancak güvenlik eğitimi almış ve güvenlik konusunda yeterli bilince sahip çalışanlar iş yaparken güvenliği ön planda tutmaktadırlar. Böylece hizmetlerin kasıtlı olarak geciktirilmesi veya gerçekleştirilmemesi anlamına gelen hizmet sabotajı önlenebilir. Çünkü hizmet sabotajı yaşayan örgütlerde iş süreçleri ve sunulacak hizmetlerde aksamalar yaşanabilir. Bu durum örgütün müşteri kaybına, ciddi maddi kayıplara neden olabilir ve dolayısıyla örgütün varlığına zarar verebilir. Çalışmada temel amaç güvenlik eğitimi ve güvenlik farkındalığının hizmet sabotajı üzerine etkisinde güvenlik önceliğinin aracılık rolünü tespit etmektir. Bunun yanı sıra kavramlar arasındaki etkileşimlerde çalışma kapsamında incelenecektir. Çalışmanın örneklemini Kayseri’deki sac ve metal işleme makinelerinin üretimini yapan bir işletmenin çalışanları oluşturmaktadır (n=328). Yapılan analiz sonuçlarına göre güvenlik eğitiminin hizmet sabotajını negatif yönde; güvenlik eğitiminin güvenlik önceliğini pozitif yönde; güvenlik farkındalığının hizmet sabotajını negatif yönde; güvenlik farkındalığının güvenlik önceliğini pozitif yönde ve güvenlik önceliğinin hizmet sabotajını negatif yönde etkilediği saptanmıştır. Ayrıca güvenlik eğitiminin hizmet sabotajı üzerine etkisinde güvenlik önceliğinin aracı etkiye sahip olduğu belirlenmiştir. Ancak güvenlik farkındalığının hizmet sabotajı üzerine etkisinde güvenlik önceliğinin aracı etkiye sahip olmadığı tespit edilmiştir.
An Integrated Factor Analysis-Technique for Order Preference by Similarity to Ideal Solution for Location Decision in ASEAN Region: A Case Study of Thai Fabric Manufacturing Plant
Authors: Atthirawong Walailak , Panprung Wariya , Wanitjirattikal Puntipa
Published: June 2022

In this paper, we propose an integrated model for selecting a suitable location for fabric manufacturing plants in the ASEAN region. In the first phase, Cambodia, Vietnam and Indonesia were determined as candidate locations for evaluation from the screening process. In this regard, key criteria influencing location decisions were derived using factor analysis of responses extracted from questionnaires. In the second phase, criterion weights were calculated using the rank of centroid (ROC) method. Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) was then used to prioritize three location alternatives, and sensitivity analysis was also employed to verify the stability of the method. Based on TOPSIS method, Vietnam was the preferred location, followed by Indonesia while Cambodia was not recommended. Sensitivity analysis also showed that the proposed model was valid. The findings from this study provided references for enterprises engaged in international location decision making. The results can help them better understand the decision-making process and identify key criteria that can influence location decisions internationally.
CHẨN ĐOÁN VÀ ĐIỀU TRỊ TRÀN DỊCH DƯỠNG CHẤP MÀNG PHỔI KHÔNG DO CHẤN THƯƠNG
Authors: Nguyen Ngoc Cuong , Lê Tuấn Linh , Đoàn Tiến Lưu
Published: June 2022

Tràn dưỡng chấp màng phổi là tình trạng xuất hiện dịch dưỡng chấp trong khoang màng phổi. Có hai bệnh cảnh của tràn dưỡng chấp màng phổi là gặp phải sau phẫu thuật, chấn thương và tràn dưỡng chấp màng phổi tự phát. Nếu trường hợp tràn dưỡng chấp màng phổi sau phẫu thuật/chấn thương chẩn đoán xác định và điều trị can thiệp hiện nay tỷ lệ khỏi rất cao bởi hình thái tổn thương thường là rách ống ngực hoặc nhánh bên của ống ngực thì tràn dưỡng chấp màng phổi tự phát lại rất khó xác định vị trí tổn thương và điều trị là hết sức khó khăn. Những hiểu biết về giải phẫu của tuần hoàn dưỡng chấp hiện nay cho phép chẩn đoán và điều trị thành công ở một số bệnh nhân nhưng tỷ lệ này vẫn còn hạn chế. Bài viết này tổng quan về các nguyên nhân gây tràn dưỡng chấp màng phổi và chiến lược tiếp cận chẩn đoán, điều trị một bệnh nhân rò dưỡng chấp màng phổi tự phát từ can thiệp đến phẫu thuật hoặc gây dính màng phổi.
A report on positive phototaxis exhibited by newly emerged bagworm caterpillars (Lepidoptera: Psychidae)
Authors:   1Entomology Branch, Forest Protection Division, Forest Research Institute, P.O. New Forest, Dehradun, Uttarakhand 248006, India, Tripathy Ashirwad , Panda Shuvangi ,   Department of Forest Policy and Law, College of Forestry, Orissa University of Agriculture and Technology, Bhubaneswar, Odisha 751003, India
Published: June 2022

The bagworm, Thyridopteryx ephemeraeformis (Haworth) (Lepidoptera: Psychidae) is a polyphagous moth that defoliates ornamental shrubs and trees. It has been reported as an emerging pest in the coastal agroecosystem of Odisha, India. A small experiment demonstrated that bagworm's newly emerged larva (NEL) was positively phototactic under white and UV light. After emerging in the rearing box, the larva was exposed to 3 volts of LED white and UV lights. After which, its phototactic behaviour was observed. Considering this report, light traps can be used to catch this nuisance species, which may now be more manageable. Hanging light sources on infested plant branches may be one technique, and when larvae congregate on that area of the branch, it may be easy to remove and kill them.
Monitoring of major insect pests, correlation and yield loss in pearl millet
Authors:   Main Pearl Millet Research Station, Junagadh Agricultural Univeristy, Jamnagar-361006, Gujarat., R.P Juneja , GM Parmar , RJ Chaudhari , KD Mungra
Published: June 2022

Investigations were carried out at Main Pearl Millet Research Station, Junagadh Agricultural University, Jamnagar (Gujarat) during kharif 2021 revealed that shoot fly, Atherigona soccata, stem borer, Chilo partellus, and ear head worm, Helicoverpa armigera were the major insect-pests in pearl millet. Significant correlation was found of shoot fly, stem borerand Helicoverpa armigera with different weather parameters. There was a considerable loss in yield due to insect-pest complex in pearl millet
What Science Teachers Notice: The Impact of an Online Graduate Program on Middle School Science Teachers’ Noticing
Authors: WONG Sissy , DONZE Jennifer
Published: June 2022

What teachers notice is important because it can impact their curricular decisions. As teachers acquire experience over time, they are more able to notice and interpret critical facets of effective science instruction. This qualitative study shares how a two-year online master’s degree program impacted what middle school science teachers noticed during observations of a video of instruction. Constant comparative method was used to generate categories of what teachers noticed at the start of the two-year program, after the first year, and at the end of the two-year program. The results were categorized as; (1) context, (2) classroom management, (3) students, and (4) teacher. Data analysis found that, in general, what teachers noticed did not change over the two-year period. For teachers with six or more years of experience, they noticed more regarding student-centered instruction and lesson format (inquiry) over time.
The Development Executive Functions for Early Childhood in 21st Century
Authors: Poowanna Bongkotrat , Sarnkong Rattikan , Wangsitthidet Suchada , Srikula Warintip , Nakunsong Tassanee
Published: June 2022

Developing executive functions (EF) is a crucial issue in early childhood development which is also important in 21st-century learning. EF guideline was developed by Permsubhirunya and co to provide a guide for teachers who seeks to develop learning activities that could improve executive functions in children under the age of 6. The purpose of the study was to investigate the effect of the utilization of the EF guideline on the development of early childhood teachers’ abilities in designing learning experiences for EF development. The study was conducted with a qualitative approach. The participants were 65 teachers in public early childhood centers in Thailand. The participants were purposively selected using the criteria of their work status and experience. The instruments were the EF guideline, an evaluation form for learning management design ability and learning material selection, and an interview form. The data were analyzed using content analysis and thematic analysis. The results of the study were in the descriptive presentation. The findings could be summarized that the use of the EF guideline was beneficial in developing teachers’ knowledge of the early childhood executive functions, abilities to design learning management, and ability in selecting or creating learning material. The findings also suggested that teachers perceived the EF guideline as potential learning material that help them make a connection between the plan, activities, and evaluation. Therefore, it also helped them control the process of learning management and contribute to a meaningful learning environment.
MEMBAHARUI SISTEM INFORMASI SMK GAJAH MADA BANYUWANGI
Authors: Verdy Bagus  , Djuniharto  , Dwi Yulian R. L
Published: June 2022

Sekolah Menengah Kejuruan SMK Gajah Mada Banyuwangi merupakan salah satu sekolah yang berada di kota Banyuwangi. Dalam memberikan informasi SMK Gajah Mada Banyuwangi memiliki sebuah website sekolah, yang dimana didalam website tersebut berisikan informasi sekolah mulai dari sarana dan prasarana, jurusan dan profile SMK Gajah Mada Banyuwangi itu sendiri. Penelitian ini bertujuan untuk merancang sistem informasi profil sekolah berbasis web pada SMK Gajah Mada Banyuwangi. Data yang digunakan adalah data sekunder berupa dokumen-dokumen yang diperoleh langsung dari SMK Gajah Mada Banyuwangi. Sistem ini menggunakan bahasa pemrograman HTML, PHP, CSS, Fremwork Codeignitier dan MySQL sebagai databasenya. Sistem ini diharapkan merubah tampilan baik menu maupun fitur yang terdapat pada website. Selain dengan sosialisasi dengan masyarakat luar SMK Gajah Mada Banyuwangi juga harus memiliki platform yang sangat menarik agar masyarakat bisa mengakses laman dari website SMK Gajah Mada Banyuwangi itu sendiri. Penyajian data yang dibuat lebih manarik lagi untuk masyarakat umum yang akan mengaksesnya.
SISTEM INFORMASI KASIR BERBASIS WORDPRESS DI CAFE BOOT CAMP
Authors: Moh Yanu Adianwar  , Dwi Yulian RL  , Eko Heri Susanto  , Faruk Alfiyan
Published: June 2022

Saat ini berbagai aspek kehidupan manusia semakin banyak yang telah memanfaatkan teknologi informasi. Semua itu dilakukan agar dapat meningkatkan efisiensi kerja. Selain itu dengan teknologi suatu informasi juga dapat disampaikan secara cepat, mudah, dan akurat. Cafe Boot Camp merupakan suatu usaha yang bergerak dibidang kuliner yang berbentuk cafe. Dimana dalam proses transaksinya masih di lakukan dengan cara pendataan secara manual, oleh karena itu di dalam proses transaksi sering terjadi kesalahan dalam menghitung jumlah yang harus dibayar dan banyaknya waktu yang dibutuhkan untuk proses penulisan laporan yang tepat dan akurat, selain itu dikarenakan prosesnya masih di lakukan secara manual, arsip yang di simpan merupakan bukti satu- satunya saat terjadi transaksi dan akan dibuat aplikasi kasir berbasis web di Cafe Boot Camp. Dengan dibuatkan sistem penjualan kasir berbasis web di Cafe Boot Camp ini dapat membantu kinerja Cafe Boot Camp menjadi lebih cepat, efektif dan efisien. Di samping itu dengan adanya sistem aplikasi kasir ini dapat merubah sistem dari manual menjadi sistem yang terkomputerisasi. Dengan demikian maka pengolahan dan penyimpanan data perubahan data, penghapusan data, pencarian data dan pembuatan laporan menjadi lebih mudah dan akurat juga dapat mempersingkat waktu peroses transaksi.