bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysing and comparing a PI fuzzy controller and an optimal conventional PI controller for a buck converter
Authors: Morales Laguado Lina , Chamorro Harold , Soriano Jairo
Published: August 2022

This document proposes analysing and designing two control strategies for permanent current DC-DC buck converter. These kinds of electronic devices convert a constant-voltage to a lower constant-voltage (nonlinearity characteristics being demonstrated). Two nonlinear control techniques are shown. The first is a conventional optimal proportional error and integral error (PI) controller based on minimising integral of time per squared errors (ITSE) criteria. A model of the plant at an operation point was thus obtained. The second one was fuzzy control where input and output sets were also defined by minimising ITSE criteria in the overall system and establishing inputs such as proportional error and integral error. Load was then varied to establish the system's efficiency with both the aforementioned controllers. It must be borne in mind that such systems should not present supervoltage since this can cause damage. The parameters found in designing both controllers thus corresponded to analytical and descriptive methodology. Simulation results, the performance index mentioned above (ITSE) and power consumption showed that the system's response for the fuzzy control drew more power consumption than the optimal controller; otherwise, obtained ITSE was larger for the optimal control than the fuzzy control. It is concluded that exploring these types of converter is applicable when using nonlinear control techniques and minimising the different performance indices.
Multiobjective transmission expansion planning considering security and demand uncertainty
Authors: Bolaños Ocampo Ricardo Andrés , Correa Flórez Carlos Adrián , Escobar Zuluaga Antonio Hernando
Published: August 2022

This paper presents a methodology for resolving the transmission expansion planning problem by considering single contingency criteria (N-1). Each bus bar in the power system considered future demand uncertainty. The planning problem was divided into an investment problem (calculating investment costs) and an operative problem (resolving power flows). A modified evolutionary elitist non-dominated sorted genetic algorithm (NSGA-II) was used for resolving the investment problem, determining several investment proposals where feasibility was evaluated by solving the operative problem. On the other hand, a high order interior point (HOIP) method was proposed for solving load flow problems. The methodology was tested by using two systems found in the specialised literature: IEEE-24 bus and Garver or IEEE-6 bus systems. The results, when compared with traditional ones, showed the proposed method’s power and the multiobjective technique’s convenience.
Evaluating erosion in an Inceptisol (soil) in Tunja (Boyacá department, Colombia) having different coverage regarding the impact of simulated rainfall
Authors: Álvarez Herrera Javier Giovanni , Fernández Rodríguez Juan Pablo
Published: August 2022

The area surrounding the city of Tunja in the Boyacá department has a heterogeneous climate and adverse conditions facilitating erosion. Scarce vegetation cover does little to reduce the impact of the rain and increases runoff. This study was aimed at analysing different types of rainfall coverage, intensity and duration by simulation. A experimental 3x3 Latin square design was used, with 3 rainfall intensities (10, 20 and 30 mm•h-1), 3 rainfall durations (1, 2 and 3 hours) and 3 types of soil coverage (kikuyo, natural coverage, bare). Each Latin square had 3 repetitions, giving a total of 27 experimental units. Significant differences were found between rainfall intensities evaluated; 30 mm•h-1 rainfall intensity generated 2,218.6 kg•ha-1 of soil loss caused by run-off. Kikuyo coverage was the vegetal cover presenting the least soil loss and greatest infiltration (1,019.1 kg•ha-1 soil loss by run-off and 0.88 cm accumulated infiltration). Rainfall duration did not affect soil loss due to run-off and infiltration. Tunja’s annual rainfall pattern showed that 2006 presented the greatest soil loss (46,663 kg•ha-1 for bare soil). This meant that corrective action must be taken quickly by implementing vegetal cover to mitigate the effects of rainfall on exposed soil to reduce the loss of such valuable resource.
Forecasting for strengthening technological development
Authors: Fúquene Montañez Aida Mayerly , Ramírez Martínez Diana Cristina , Castellanos Domínguez Óscar Fernando
Published: August 2022

Producing technological innovation is currently one of the key items in being more competitive. However, production sectors are facing great challenges, including analysing a large amount of available technological and market information regarding the environment for strategic decision-making and being able to launch themselves onto the market with technological developments bringing the desired economic returns. Several tools for analysing information have emerged for reducing the uncertainty of technological and market changes. This article provides conceptual and reflective elements so that forecasting strengthens technological development (TD). Forecasting is initially proposed as being one of the future methods of analysis having a significant impact on decision-making, mainly within the field of economics but which could be extrapolated to making a contribution to TD. The techniques which have been the recent instrument for collecting information for producing forecasting are described, as is work about the concept of surveillance/monitoring and the processes used for coordinating such approaches. It can thus be stated that they provide an excellent basis for strengthening TD by providing platforms for new or improved developments in processes or products. Reflection about these aspects provides perspectives for implementing technological forecasting (TF) in production systems so that they obtain efficient and concrete results via deterministic methods as input in decision-making in technology regarding its middle and long-term competitiveness.
Identifying critical factors for implementing good agricultural practice
Authors: Gutiérrez Guzmán Nelson , Serra Belenguer Juan Antonio , Clemente Marín Gonzalo
Published: August 2022

This paper deals with identifying the critical factors (CFs) involved in implementing a good agricultural practice (GAP) programme for coffee and fruit farmers in the Huila department of Colombia. An exploratory factor analysis using principal component analysis (PCA) factorisation was used. Data matrixes were constructed from the results of applying two defined-structure assessment tools to the populations being studied: Starbucks’ coffee and farmer equity (CAFE) practices for small-scale coffee growers and coffee-producers and the EUREPGAP V2.1 Oct.2004 / checklist for fruit and vegetables, as applied to fruit-producers. This investigation led to identifying 6 CFs which must be considered when implementing a GAP programme: infrastructure, established production activities, preparing and maintaining records, environmental awareness, workers’ welfare and safety and quality control.
Ciência cognitiva
Authors: Sinigaglia Bárbara Klimiuk
Published: August 2022

No século XX surgiu um novo campo científico com o objetivo de investigar a mente humana e sua realização cerebral. A linguagem lógica matemática e o conceito de computação aproximaram a compreensão da mente humana aos processos computacionais e os avanços tecnológicos acompanharam este início. Na década de 1950 este novo campo recebeu o nome de ciência cognitiva e nos anos 1970 se estruturou com uma abordagem interdisciplinar com ênfase cognitivista. A partir de 1990 as teses cognitivistas foram questionadas pela hipótese da cognição corporificada fundamentada na perspectiva orgânica e neurobiológica da cognição humana. Ao analisar a evolução histórica da investigação científica da mente humana percebemos que é um campo muito amplo e diversificado, pleno de esclarecedores debates e que é justamente isto que o torna importante para o empreendimento de conhecer as capacidades mentais humanas em uma abordagem naturalizada que complementa as abstrações filosóficas. Para nós, compreender este percurso histórico é fundamental para dimensionar o valor deste campo em direção à progressiva compreensão científica do que é a mente humana.
Experiencias desarrolladas por las personas directoras de escuelas primarias en el ejercicio de sus funciones durante el periodo de pandemia por COVID-19
Authors: Hernández Vélez Adrián
Published: August 2022

En este artículo se analizaron las experiencias directivas que las personas directoras de las escuelas primarias de Puebla, México, desarrollaron en el ejercicio de su función durante la pandemia ocasionada por el virus SARS-Cov-2 (COVID-19). En los referentes teóricos se reconocieron tres formas de ejercer la función directiva: pedagógica, gerencial y mixta. La investigación tuvo un posicionamiento epistémico de corte fenomenológico-hermenéutico con enfoque cualitativo y diseño de estudio de caso. El instrumento consistió en una entrevista semiestructurada aplicada por Google Meet en el periodo de marzo a abril del año 2021. Los hallazgos sugieren que las personas directoras ejercieron su función apegadas a la forma de dirección mixta con énfasis gerencial. Potenciaron habilidades de liderazgo, comunicación, trabajo en equipo y resolución de problemas. Además, desarrollaron líneas discursivas con énfasis ontológico, conforme al cual el ser humano, complejo y subjetivo constituye la razón de ser que anima toda forma de existencia social; pro-salud enfocado al cuidado de la salud física y emocional; ético que orientó las formas de ejercicio laboral con base en el análisis de la pertinencia del marco normativo-institucional; y tecnológico que promovió el fortalecimiento de las habilidades digitales para el adecuado desarrollo de sus funciones. También, implementaron dispositivos hermenéuticos, permanentes y transitorios para comprender e interpretar la nueva realidad educativa. Los dispositivos permanentes fueron de tipo ontológico, ético-profesional, lingüístico, epistemológico, ideológico, identitario, pedagógico-didáctico y técnico. Los dispositivos transitorios fueron de tipo resiliente y residual. Finalmente, los resultados indican que las directoras y directores reconocieron su condición humana, así como su salud física y emocional como los máximos baluartes dentro de la emergencia sanitaria.
Percepción del estudiantado de Enseñanza del Inglés de la Sede del Atlántico de la Universidad de Costa Rica al iniciar la pandemia de COVID-19
Authors: Ramírez Zúñiga Andrea , Solís Pérez Nathalia , Ureña Salazar Elvia
Published: August 2022

Este artículo presenta los resultados de un estudio de percepción llevado a cabo con 74 estudiantes de la Carrera de Enseñanza del Inglés de la Sede del Atlántico de la Universidad de Costa Rica durante el I Ciclo lectivo 2020, para identificar cómo el estudiantado percibió la virtualización de la enseñanza originada por la pandemia. Esta investigación permitió determinar que la modalidad de enseñanza implementada fue la educación remota de emergencia, que pretendía no exponer a estudiantes ni a docentes a la presencialidad. La metodología se basó en un enfoque cuantitativo de alcance descriptivo que estudió e interpretó las percepciones del estudiantado con base en la información obtenida en un cuestionario electrónico. Los resultados indicaron que el estudiantado conoce sobre tecnología aplicada a la enseñanza, lo cual le permite participar de actividades educativas en un contexto virtual, situación que fomenta el trabajo individual y una mejor organización de tareas, gracias a su capacidad de adaptación y actitud responsable hacia el estudio. Algunas actividades educativas percibidas como útiles fueron el intercambio de documentos, material audiovisual, prácticas en línea y exposiciones orales. Hubo factores externos que pudieron limitar el desempeño académico del estudiantado, como la falta de acceso a internet y una condición física y mental cansada, reflejados en el estrés y cansancio originados por estudiar a diario detrás de una pantalla, con clases prolongadas y trabajos extensos. Por tanto, el proceso de enseñanza del I-2020 se percibió con aspectos positivos y negativos de parte del estudiantado, el cual debió enfrentarlo para cumplir con los objetivos de aprendizaje propuestos.
Competencias pedagógicas necesarias para la evaluación de las matemáticas: Un estudio de caso durante la pandemia por COVID-19
Authors: Vargas Solís María Antonieta , Chinchilla Madrigal Andrea María
Published: August 2022

Este artículo trata sobre un estudio cualitativo llevado a cabo por las investigadoras como requisito para obtener el grado de maestría en educación con énfasis en evaluación educativa, en un momento donde la educación costarricense se estaba impartiendo a distancia debido a la pandemia ocasionada por el COVID-19. Como consecuencia nace la inquietud de investigar con el objetivo de identificar las competencias pedagógicas de las personas docentes para evaluar las matemáticas en el cuarto año de primaria en una escuela subvencionada. De esta manera, se diseña un estudio de caso en el que se utilizaron dos matrices de revisión documental, una para las Guías de Trabajo Autónomo, y otra para el Instrumento de Evaluacion Sumativa, así como un cuestionario cualitativo con preguntas cerradas y abiertas que se les aplicó a las dos personas docentes que impartieron matemáticas en el 2020 en ese centro educativo. Para el análisis de la información se llevó a cabo una triangulación entre las fuentes de información y se hizo un análisis temático. Los datos mostraron que las personas docentes son competentes únicamente en relación con la conceptualización de la heteroevaluación y la autoevaluación, así como la aplicación de esta última. Se concluyó que las personas docentes no son competentes en relación con el manejo del paradigma pragmático ni de la evaluación del proceso. También, muestran deficiencias técnicas en cuanto al diseño de los indicadores y construcción de instrumentos de evaluación. Sin embargo, son competentes en cuanto a la conceptualización y aplicación de la autoevaluación y la heteroevaluación.
Redes sociales y experiencias universitarias durante la enseñanza remota de emergencia en Costa Rica
Authors: Gómez-Montero Paola , Brown-Mata Gloriana , Mora-Masís Alejandra , Páez-Lupario Elizabeth , Vargas-Araya Cristina
Published: August 2022

Los cambios en la enseñanza superior por la pandemia COVID-19 han afectado al estudiantado universitario, incluido el de la Universidad de Costa Rica (UCR). Las redes sociales que ofrecen espacio de confesiones anónimas son una fuente de información para ampliar el conocimiento de esta problemática. El objetivo de este estudio fue identificar las principales temáticas relacionadas con el bienestar, la educación remota de emergencia y la pandemia por COVID-19, expresadas por estudiantes de la UCR a través de la página de Facebook, Confesiones UCR, durante los períodos comprendidos entre el 06 de marzo, 2020, al 30 de septiembre, 2021; y del grupo Experiencias Virtuales UCR entre el 04 de julio, 2021, y el 30 de septiembre, 2021. Desde un enfoque cualitativo, se realizó una revisión documental de 133 publicaciones de ambos sitios, con un análisis de frecuencias de categorías temáticas encontradas, que se agruparon en tres dimensiones: personal, interpersonal e institucional. Se observó que las situaciones atravesadas por el estudiantado responden a dificultades individuales (predominantemente ansiedad y/o estrés, cansancio, desmotivación y cuestionamientos sobre la continuidad de los estudios), interpersonales (sobresale la falta de apoyo familiar, de amistades y de pares) para hacer frente a retos de la educación remota de emergencia y mantener el bienestar; y también evidencian puntos de mejora y limitaciones institucionales (especialmente el poco apoyo o interés docente percibido) para afrontar los retos. Se concluye que los sitios revisados facilitan el desahogo, las solicitudes, y el intercambio de apoyo entre el estudiantado, ante los problemas que afectan sus diferentes dimensiones de bienestar y contribuyen al proceso educativo.
Prospección de escenarios para la enseñanza de la Filosofía de la Administración: ¿Negocio o sabiduría práctica?
Authors: Bazanini Roberto , Minuzzi Vilanova Miguel Eugenio , Ryngelblum Arnaldo Luiz
Published: August 2022

El estudio tiene como objetivo discutir los paradigmas que orientan la producción de conocimiento filosófico en el campo de los estudios organizacionales y, en consecuencia, los posibles rumbos que la enseñanza y el aprendizaje de la disciplina Filosofía de la Administración para cursos de Gestión Empresarial pueden tomar en la prospección para escenarios sobre la realidad brasileña, especialmente en períodos de crisis acentuada y poscrisis, como la resultante a partir del COVID-19. Utilizando la metodología de la crítica retórica y los procedimientos del método Bazanini en la enseñanza de la filosofía, estas propuestas, en línea con el enfoque de la Sociología Integral de Max Weber, acompañadas de la técnica del Focus Group, abordaron la evolución, las peculiaridades de la disciplina y, en consecuencia, la pregunta: ¿en el escenario pospandemia que enfrentaremos?, ¿será posible contemplar los aspectos humanísticos y pragmáticos en la enseñanza-aprendizaje de la disciplina de Filosofía de la Administración referentes al modelo de Capitalismo de Stakeholders? Los resultados de las discusiones se refieren a la idea de que los pilares del modelo de Stakeholder Capitalism, en la perspectiva ontológica y epistemológica del paradigma de la Stakeholder Theory, que se caracteriza por la concepción positivista y utilitarista de las relaciones entre los agentes involucrados en la empresa, al omitir los requisitos no pragmáticos del contexto social, constituyen otra moda intelectual más en la que la filosofía es reemplazada por un mero procedimiento retórico y transformada en una filosofía consoladora. El aporte de este ensayo crítico radica en debatir analíticamente la prospección de escenarios a partir de la teoría y de los matices del saber práctico de enseñanza-aprendizaje en el campo de los estudios organizacionales.
Expected compressive strength in precast, prestressed concrete design: A methodology to analyze regional strength results
Authors: Mante David M. , Isbiliroglu Levent , Hofrichter Andric , Barnes Robert W. , Schindler Anton K.
Published: August 2022

Accurate predictions of concrete compressive strength are critical for designers to effectively estimate the camber, deflections, and prestress losses of precast, prestressed concrete elements. A methodology that relies on regional concrete bridge girder strength test results is proposed for predicting expected concrete compres­sive strength. Strength data collected from precast, prestressed concrete plants were manipulated by the use of a strength-difference approach to facilitate American Concrete Institute 214R-11 analysis methods. The data set was used to evaluate five other empirical prediction model forms. When implemented using an Alabama regional data set, the methodology resulted in markedly more accurate predictions of expected concrete strength at prestress transfer and at 28 days compared with cur­rent practice.
The effects of deep breathing on the mental toughness of athletes in Puchong Fuerza football club
Authors: Ismail Fakrul Hazely , Abd Karim Zulakbal , Rozali Nuraliah Amani , Ramalu Ramesh Ram
Published: August 2022

Background and Study Aim.  A group of psychological traits that are essential to achieving peak performance are referred to collectively as mental toughness. One of the most significant  psychological traits linked to sports success, according to athletes, coaches, and sport psychologists, is mental toughness. This study aims to identify the effects of deep breathing on the mental toughness of athletes in Puchong Fuerza Football Club who played in M3 Football League, the Malaysia's third-tier football league.
Material and Methods. The research was conducted experimentally with two sessions which include pre-test and post-test. Mental Toughness Questionnaire 48 (MTQ48) and deep breathing techniques were used in this research. Data findings were analyzed to answer the research questions and null hypothesis. Hypothesis testing was used, and inferential statistics analyzed the data. Paired sample t-test was used to identify the effects of deep breathing techniques on mental toughness scores in pre-test and post-test.
Results.  The analysis results showed that data on mental toughness was negative. It proved by the mean score difference of the pre-test and post-test, in which there were increments of mental toughness score after applying deep breathing technique. Meanwhile, there was a significant difference in mean scores between players toward their mental toughness based on pre-test and post-test results.
Conclusions. Therefore, the deep breathing technique has relations with performance and psychological outcomes and can be use as a pre-match mental preparation. It is suggested that coaches and athletes may include the deep breathing technique in training program. The players need to undergo psychological skill training such as deep breathing technique to improve their mental toughness and to ensure that anxiety is at an optimal level in order to achieve excellent performance in competitions.
Actualization of the Thoughts of Prof. Dr. Wahbah al-Zuhailiy in the Sale and Purchase of Stocks Transaction
Authors: Wahyudi Nur
Published: August 2022

This journal presents one of the thoughts of contemporary Islamic scholars, namely Prof. Dr. Wahbah al-Zuhaili. He is known to be very representative in judging every contemporary issue. His thinking is positioned as the basis of sharia for buying and selling shares. An understanding of the law of buying and selling shares will be answered by analyzing the thoughts of Prof. Dr. al-Zuhailiy, which is stated in his book, Al-Mu'āmalah al-Māliyah al-Mu'āshirah. Two questions in this research are: How does Prof. Dr. Wahbah al-Zuhailiy in the sale and purchase of shares? And how is the actualization of the thinking of Prof. Dr. Wahbah al-Zuhailiy in the sale and purchase of shares? Data collection is done using library research as the theoretical basis. After the primary and secondary data are collected, an in-depth analysis of the data sources uses deductive and inductive approaches. The conclusion obtained is that buying and selling shares is analogous to the concept of shirkah and muḍārabah (Muḍārabah musyarākah) contracts. In modern language, it is called musharakah mushamah. Actualization of the thoughts of Prof. Dr. Wahbah al-Zuhailiy in buying and selling shares is to provide syar'iy rules in it so that the transaction is legal according to shari'ah.
Netizen's Reception of Covid-19 Vaccination Policy Communication Through Instagram Account @kemenkes_ri
Authors: Lutpi Supi Ainul , Rohimat Muhammad Febriansyah , Alpin Alpin , Laksana Muhibudin Wijaya
Published: August 2022

The Covid-19 vaccination is one of the efforts of the Indonesian government to reduce morbidity and mortality due to the Covid-19 virus that hit Indonesia. In addition, this policy aims to create herd immunity in Indonesian society. The Ministry of Health of the Republic of Indonesia, as the leading sector of the Covid-19 vaccination policy in Indonesia, continues to disseminate policies so that target groups can see, understand, and prepare to implement this policy. The @kemenkes_ri account, managed by the Ministry of Health of the Republic of Indonesia, is used as one of the communication strategies in communicating this policy. Public acceptance of this policy is very diverse, as seen from the comments made in several publications at @kemenkes_ri about Covid-19 vaccination. This study aims to analyze the audience's acceptance and meaning of the Covid-19 vaccination policy information submitted through the @kemenkes_ri account. The method used in this research is using the qualitative interpretive method with a constructivist approach and reception analysis of Stuart Hall's encoding-decoding model. Data collection in this study was obtained by conducting semi-structured interviews and analyzing @kemenkes_ri Instagram feed uploads. Public acceptance of the Covid-19 vaccination policy in Indonesia is divided into three groups: hegemonic dominant positions, hegemonic negotiating positions, and hegemonic opposition positions. The three audience groups have different meaning constructions regarding the Covid-19 vaccination policy in Indonesia.
The Effect of Regional Micro Business Policy Implementation on the Effectiveness of Leather Processing Industry Development in Garut Regency
Authors: Suparman Nanang
Published: August 2022

This research is motivated by the development of a small industry in the leather sector and has become an icon of Garut Regency. The implementation of regional micro-business policies in fostering the leather and food processing industry is influenced by several aspects that make it easier or more difficult. This study aims to identify and examine the effect of regional micro-business policy implementation on the effectiveness of the leather processing industry development in the Garut Regency. The method used in this research is explanatory research to explain the causal relationship and hypothesis testing. Data collection was carried out by census by collecting data from research respondents and then tested according to research hypotheses that had been formulated. The data analysis results show a significant influence, but the policy's success has not been smooth. Factors that hinder the discrepancy between policies and the problems at hand are different understandings of policy goals and objectives, inadequate resources in implementing organizations and target groups, implementation procedures, communication and coordination, environmental support, and underlying values.
Implication of Refocusing Policy on Education Financing In State Islamic Universities During Covid-19 Pandemic
Authors: Rahayu Yayuk Sri
Published: August 2022

A budget is an important tool for the government to implement its programs, which are more or less influenced by budget management. The state budget reflects the policy decisions between the executive and the legislature that describe what the government does each year. This political decision has a major impact on people's living standards, especially in terms of better fulfilling the basic needs of citizens. As is understood, a policy always has a purpose. In the context of these objectives, it is hoped that every substance of public policy will always be useful for fulfilling the interests of the people. It's just that in the context of benefits, each public policy provides different benefits for various community groups. The greatest benefits of a public policy tend to be enjoyed by the initiator of public policy. This study was conducted to examine the effect of government policies with adjustments to the management of education funds at State Islamic Universities during the pandemic. This research method is to cite qualitative data from various primary and secondary literature. Informants as data sources and actors who contribute to the success or failure of an investigation based on the information provided. Based on the results of the study that the refocusing policy greatly influences education financing during the pandemic, this is evidenced by the reallocation of several activity programs which at the beginning of the year had been prepared to allocate several programs related to the handling of covid 19.
THE IMPACT OF SOCIAL MEDIA MARKETING ON PURCHASE INTENTION OF SKINCARE PRODUCTS AMONG INDONESIAN YOUNG ADULTS
Authors:   HELP University, Malaysi, Chrisniyanti Ayu , Fah Chung Tin ,   HELP University, Malaysi
Published: August 2022

This study aims to investigate the impact of social media marketing activities (SMMAs) on purchase intention of skincare products among Indonesian young adults. The secondary objective of this study is to investigate the mediating effect of subjective norms, perceived behavioral control, brand awareness, and social brand engagement on the relationship between social media marketing activities on purchase intention of skincare products. Despite its popularity in the Indonesian market, the study on the impact of social media marketing activities on purchase intention of skincare products among Indonesian young adults has not been completely investigated and is still limited in Indonesia. This study adopts a quantitative crosssectional method. A total of 271 responses were collected from the respondents aged 18 to 34 years old through non-probability sampling. It was found that social media marketing activities (SMMAs) have a positive significant impact on purchase intention of skincare products among Indonesian young adults. Additionally, the relationship between social media marketing activities and purchase intention was significantly mediated by subjective norms, perceived behavioral control, brand awareness, and social brand engagement. The findings of this study will assist skincare brands’ marketers and future researchers to have useful insight into the impact of social media marketing activities on purchase intention of skincare products.
Dragonflies and Damselflies of the Lower Olifants River Valley: Citrusdal to the sea
Authors: Tippett Ryan , Willemse Salome , Underhill Les G
Published: August 2022

This paper contains a list of the 38 species of dragonflies and damselflies recorded to date on the section of the Olifants River between Citrusdal and the sea at Papendorp. It is designed to be used as a guide for residents and visitors. To help with the identification of species, links to the species texts in the online Atlas of the Dragonflies and Damselflies of South Africa, Lesotho and Eswatini are provided. These contain comprehensive species information and annotated photographs. We also set out priorities for further observations.
Preservação de genótipos moderadamente resistentes ou tolerantes: uma estratégia para suplantar o declínio da goiabeira
Authors: Silva Maurício Moisés Pereira , Queiróz Manoel Abilio de , Oliveira Patrícia Gomes , Coutinho Milena dos Santos
Published: August 2022

Originária da América Tropical, a cultura da goiabeira (Psidium guajava L.) tem grande relevância para o Brasil. Contudo, surgimento do patossistema designado como declínio da goiabeira, problema fitossanitário provocado pelo parasitismo das raízes por nematoides da espécie Meloidogyne enterolobii Yang & Eisenback em associação com fungos oportunistas, dizimou muitos pomares em todas as regiões do Brasil e em outros países. No presente estudo, propagou-se vegetativamente, por miniestaquia, acessos de goiabeiras seminíferas mantendo seus genótipos preservados e reavaliando a resistência por meio dos clones de forma a comprovar ou não as reações das plantas hospedeiras. Os resultados apontam para alta virulência do parasita, bem como alta hospedabilidade da espécie P. guajava, além da existência de grande variação da reação entre plantas do mesmo genótipo e entre genótipos distintos, o que indica que a estratégia de preservação do germoplasma e a reavaliação da reação em clones pode ser importante na busca e seleção de germoplasma com algum grau de resistência ou características de tolerância ao M. enterolobii. A progênie da cv. Paluma P02R5R2 obteve a menor média de Fator de Reprodução do parasita (FR = 22,11) entre os genótipos avaliados, sendo classificada como moderadamente resistente e preservada para estudos posteriores.
Briefing: Compliance with the rules of court as an expert witness
Authors: Saunders Sarah
Published: August 2022

Many engineers act as expert witnesses or are considering taking on some expert witness work. This paper provides guidance on the current civil court rules that are relevant to engineers writing expert witness reports and giving expert evidence in civil claims, to assist engineers in complying with the civil court rules applicable to experts.
Identification and characterization of bacterial biofilm production in clinical isolates of Staphylococcus spp. against antimicrobials
Authors: Martins Lamartine Rodrigues , Silva Mariana Quitéria de Morais , Medeiros Neto Carlos Alberto , Pimentel Maria Izabelly Silva , Rocha Igor Vasconcelos , Oliveira Sibele Ribeiro de
Published: August 2022

Justification and Objectives: Circulating blood is sterile and the presence of microorganisms can be of clinical interest, especially in the hospital environment, being able to cause infectious processes and substantially increase morbidity and mortality. The objective of this work was to characterize the isolates of the genus Staphylococcus spp. from bloodstream infections as to the production of bacterial biofilm and resistance to the main antimicrobials used in clinical practice. Methods: Blood cultures were collected with an indication of positivity for bacterial growth from multiple sectors of the study hospital, which were subsequently processed to identify the bacterial genus through the use of phenotypic tests for Gram positive bacteria. The verification of the resistance profile was performed following the Kirby-Bauer disk diffusion. The identification of the production and quantification of the bacterial biofilm occurred following the protocol described by O’toole (2010). Results: The most frequent clinical isolate was Coagulase negative Staphylococci 38 (54.29%), followed by Staphylococcus aureus 32 (45.71%). Resistance to erythromycin, norfloxacin, levofloxacin and azithromycin was observed in most isolates (70%). Regarding methicillin, more MRSA (59.38%) than MR-CONS (47.37%) were isolated. The ICU was the place where the formation of the biofilm showed indicative data of greater adherence, which was associated with MRSA strains. Conclusion: The bacterial isolates associated with bloodstream infections showed high resistance to antimicrobials. The presence of MRSA and MR-CONS with strong and/or moderate biofilm production capacity represents a greater risk to the health of patients affected by infections caused by these agents.
Aspectos epidemiológicos de la Leishmaniasis Visceral Humana en el estado do Piauí, Brasil (2007-2017)
Authors: Ferreira Henrique Rafael Pontes , Pacheco Ana Carolina Landim , Marques Márcia Maria Mendes
Published: August 2022

Justificativa e Objetivos: A leishmaniose visceral apresenta considerável expansão em centrosurbanos no Piauí, e a sua ocorrência é marcada por sucessivos registros de surtos. O objetivodeste estudo foi analisar os casos notificados de Leishmaniose Visceral Humana no Piauí, entreos anos de 2007 e 2017. Métodos: Os dados sobre os números de casos e variáveis, como adistribuição no tempo, no espaço e algumas características das pessoas atingidas, óbitos ediagnóstico, foram através do Sistema de Informação de Agravos de Notificação (SINANDatasus). Resultados: Foram notificados 2.447 casos, com 2.265 casos autóctones (92,56%),e o diagnóstico laboratorial conclusivo foi realizado em 86,6% dos casos. O ano de 2014 foi oano com maior registro (283 casos) e maior coeficiente de letalidade anual de 14,1%. Ao todo,183 municípios (81,7%) apresentaram casos positivos em residentes. Na capital, Teresina,ocorreu o maior número de casos em residentes (734 casos, 30%) e foi o município que maisnotificou em todo o estado (1.859 casos, 75,97%). Os mais acometidos foram indivíduos dosexo masculino (66,30%) e faixa etária menor que 10 anos (43,44%). Em relação àescolaridade, a classificação “não se aplica” foi mais prevalente (39,84%), assim como araça/cor parda (88,27%) e a zona residencial urbana (67,63%). Conclusão: A realização destasanálises fornece informações sobre a situação epidemiológica da leishmaniose visceral no Piauíem uma série histórica de 2007 a 2017, como a distribuição espacial dos casos, municípios commaiores incidências, a dificuldade de acesso ao diagnóstico, grupos sociais mais acometidos eóbitos, podendo auxiliar no direcionamento das ações para o controle da doença no estado.
Prevalência de multimorbidade e fatores associados em trabalhadores de uma instituição de ensino superior
Authors: Bobato Geiza Rafaela , Spekalski Midiã Vanessa dos Santos , Cabral Luciane Patrícia Andreani , Grden Clóris Regina Blanski , Fadel Cristina Berger , Bordin Danielle
Published: August 2022

Justificativa e Objetivo: a multimorbidade pode gerar incapacidades, quando associada ao trabalho, afetando a redução de participação na força de trabalho, rotatividade de empregos e aposentadoria precoce. Dessa forma, objetivou-se estimar a prevalência e identificar fatores associados à multimorbidade em trabalhadores de uma instituição de ensino superior. Método: estudo transversal, quantitativo, realizado com trabalhadores de uma instituição de ensino superior (n=629) na cidade de Ponta Grossa, PR, Brasil. Para coleta de dados, utilizaram-se questionários com instrumentos do Ministério da Saúde. A variável dependente se referiu à presença de multimorbidade, e independentes, às características sociodemográficas, de trabalho, utilização de serviços de saúde, percepção de saúde, presença de sintomas, estilo de vida e hábitos alimentares. Realizou-se Teste do Qui-Quadrado e regressão logística. Resultados: a prevalência de multimorbidade foi de 53%, estando associada à idade (OR=2,99), excesso de peso (OR=1,77), dor (OR=4,54), autoavaliação de saúde geral (OR=2,08) e saúde bucal (OR=2,30) (p<0,05). Indivíduos com multimorbidade buscam mais o acompanhamento por uma Unidade Básica de Saúde (OR=0,54) e realizam consultas médicas de rotina de forma mais frequente (OR=0,83) (p<0,05). Conclusão: observou-se alta prevalência de multimorbidade nos trabalhadores avaliados, com associação estatística aos fatores biológicos, de estilo de vida, percepção de saúde e acesso a serviços de saúde. Dessa forma, é possível traçar estratégias visando reestabelecimento de saúde dos trabalhadores, melhorando sua qualidade de vida.
Políticas culturais, indicadores e Comunicação Pública
Authors: Martins Tiago Costa , Pinto Maria Manuela Gomes de Azevedo , Silva Armando Manuel Barreiros Malheiro da
Published: August 2022

A proposta do estudo é problematizar a produção e comunicação de informação pública e a configuração de indicadores culturais com vista ao desenvolvimento de instrumentos e novos formatos de disponibilização e interação nas práticas governamentais. O paper procura articular os conceitos de política cultural, indicadores culturais e Comunicação Pública e apresentar uma proposta de modelo interpretativo para a configuração de indicadores culturais a partir de um case study em Portugal. Conclusivamente, o estudo aponta que, através de práticas de Comunicação Pública, os indicadores são (i) reconhecidos enquanto ato comunicacional que (ii) potencializam as ferramentas de transparência e de prestação de contas sobre as práticas dos entes governamentais.
Conducta sexual en jóvenes universitarios: Estudio de revisión
Authors: Aguirre Rivera Juan Camilo , Restrepo Soto Jaime Alberto
Published: August 2022

Objetivo: Describir y analizar estudios sobre la conducta sexual en jóvenes iberoamericanos.

Método: Revisión bibliográfica de 150 referencias, tomadas de las bases de datos Web of Science, Latindex, Scopus, ProQuest, Redaly, Scielo, Ebsco. Se hizo análisis de calidad mediante el uso de la Herramienta de Evaluación de Métodos Mixtos (MMAT) para 91 artículos finales.

Resultados: Existe bibliografía sobre las conductas sexuales del dominio corporal, poca del dominio social; la edad de inicio de la actividad sexual promedio en hombres fue de 15,8 años y 15,7 en mujeres. En los últimos diez años la edad de inicio de las relaciones sexuales se reduce en Chile (15,3), Colombia (16,95), España (17,97) y México (16,97); se mantiene relativamente estable en Portugal (17,25) y Ecuador (16,43); aumenta en Brasil (15,3); en Cuba (14,85) y Perú (14,77) es inestable.

Conclusiones: Se plantea la necesidad de un abordaje orientado al disfrute del ejercicio de la sexualidad (hedonismo responsable) alejado del paradigma erotofóbico imperante. Se tiene como limitación el número de artículos por región; queda abierta la vía de replicar el estudio con una mayor muestra, además de explorar y generar datos sobre las conductas eróticas desde el modelo de dominio social-corporal de Parra-Villarroel y Pérez-Villegas.
Educación de alumnos con necesidades educativas especiales en pandemia. Perspectivas de las madres y padres
Authors: García Cedillo Ismael , Márquez Cabellos Norma Guadalupe , Rubio Rodríguez Silviana , Saldívar Reyes Andrea , Romero-Contreras Silvia
Published: August 2022

Objetivo: identificar cuáles fueron, desde el punto de vista de las madres y padres, las condiciones de estudio, los aprendizajes y las reacciones emocionales antes y durante la pandemia de sus hijas/os con necesidades educativas especiales, además de conocer algunas condiciones emocionales de ellas/os mismas/os.

Método: Se realizó un estudio exploratorio, en el cual se aplicaron cuestionarios digitales a madres y padres de alumnas/os con y sin necesidades educativas especiales, seleccionados mediante un muestreo no probabilístico, intencional. Participaron 2.634 madres y padres (entre 35 y 38 años de edad en promedio, 90 % mujeres).

Resultados: Se encontró que los alumnos estudiaron en condiciones precarias, y se vieron afectados seriamente en sus aprendizajes y mostraron reacciones emocionales negativas durante la pandemia. Los alumnos con necesidades educativas especiales resultaron muy afectados, pero no mucho más que los alumnos sin estas necesidades, lo cual probablemente se debió al trabajo de las USAER. Las madres y padres, particularmente de los alumnos con NEE, presentaron cansancio y frustración.

Conclusiones: Se concluye que el confinamiento produjo serias afectaciones en todos los estudiantes, incluyendo a quienes presentan necesidades educativas especiales, pero estos no resultaron mucho más afectados gracias al apoyo brindado por las USAER.

Discusión: Estos resultados obligan a tomar medidas emergentes durante el regreso a clases presenciales para compensar las pérdidas de aprendizaje.
Incorporation of additional information into the South African Wind Load Formulation
Authors: Bakker F P , de Koker N , Viljoen C
Published: August 2022

The South African wind loading standard SANS 10160-3:2019 recently adopted an improved map of characteristic basic wind speeds and increased the wind loading partial safety factor from 1.3 to 1.6. These changes represent an overhaul of the design wind loads throughout South Africa and were the result of several studies on the wind loading standard. Since these studies were conducted, substantially more wind speed data has been made available. This investigation aimed to use this data to assess the current design loads by estimating location-specific design values that maintain the current reliability level of the standard. A statistical test was developed to assess whether the design values in SANS 10160-3:2019 could be supported by the new data. It was found that several updates could be considered. These were incorporated into a new recommended map of basic wind speeds that could be considered for inclusion in the next revision of SANS 10160-3.
Assessment of local sewage sludge ash as a supplementary cementitious material - effects of incineration temperature and cooling rate of the ash
Authors: Juala R , Ballim Y , Mulopo J
Published: August 2022

This paper reports on the possible use of sewage sludge ash as a pozzolanic supplementary cementitious material to Portland cement. Samples of sewage sludge were incinerated at 700°C, 800°C and 900°C and these were then cooled in the furnace (FISSA), in air (AISSA) or by quenching in water. The resulting ashes were ground to suitable fineness and used to prepare cement pastes and mortars in which the binder consisted of 30% ash and 70% Portland cement. The paste samples were used for microscopic and chemical assessment of the evolution of hydration products, while the mortars were used to assess the effects of the ashes on workability and compressive strength of laboratory-prepared samples using a water/binder ratio of 0.5. Fly ash was used as a reference pozzolanic material to assess the performance of sewage sludge ashes. Analysis of the sewage sludge ashes showed the presence of cementitious compounds and hydration products that suggest that this material can be used as a partial replacement of Portland cement. However, sewage sludge ash reduces the workability of the mortar. Compressive strength results indicate that the highest strength is obtained when the sewage sludge is incinerated at 900°C and then quenched in water.
NEEDS ANALYSIS OF THE DEVELOPMENT OF SCHOOLOGY AND POWTOON-BASED LEARNING MEDIA TO INCREASE LEARNING MOTIVATION AND STUDENT LEARNING OUTCOMES
Authors: Rokhim Deni Ainur , Kurniawan Carlina Sukma Ayu , Ula Qumillaylatul , Al Siddiq Imamul Huda
Published: August 2022

This article discusses the analysis of the need to develop learning media based on schoology and power to improve student motivation and learning outcomes. Student learning motivation will form motivation in achievement which is an effort to achieve the best learning outcomes that refer to the quality standards of education. Data collection techniques used are using open and closed questionnaires. The data obtained were analyzed using average calculations. The results of the study are teachers and students still using conventional learning materials and rarely use information and communication technology-based media that are more in demand by students. Thus it can be seen that overall development is still needed regarding the use of mediated based learning media especially in schoology and powtoon to stimulate students in increasing student motivation and learning outcomes
LEARNING FROM HOME IN INDONESIAN ELEMENTARY SCHOOL
Authors: Cahyaningtyas Andarini Permata , Jupriyanto Jupriyanto
Published: August 2022

Online learning has become the only alternative in many countries during the Covid-19 pandemic, including Indonesia. The study aimed to find about the online learning platform used by Indonesian elementary school teachers and what kind of problems they experienced during the outbreak in Semarang, Central Java. The research method used is the survey method. The survey was conducted online among 160 elementary school teachers, from 47 state and private schools to find fact what kind of online learning apps they used and the problem they have to experience while conducting online learning during the pandemic. According to the result of the study, we can conclude that there were 18 platforms used by teachers to conduct online learning during the pandemic. Therefore, teachers had to experience eight obstacles that most of the problems came from the internet connection, learning facilities, and the attitude of the students and parents toward online learning. From this result, teachers are expected to have a better understanding in carrying out the online learning, and find a better solution in order to solve the problems.