bluuebunny/crossref_metadata_2025 huggingface dataset:
NURSING STUDENTS’ PERCEPTION ON CLINICAL TEACHING AND LEARNING AT KENYA METHODIST UNIVERSITY, KENYA
Authors: Tuitoek Doris , Mutinda Agnes , Kubende Phidelis
Published: October 2022

Purpose: To explore RN-BSN students’ perception on clinical placements, mentorship and supervision in clinical teaching and learning.

Methodology: The study adopted a descriptive cross-sectional survey design among RN-BSN students studying at Kenya Methodist University. The sample size was determined by Fisher et al., formula and the participants were selected through simple random sampling, those who met the eligibility criteria were included in the study. Data was collected through a self-administered questionnaire and data was analysed by use of SPSS version 26, where descriptive data was presented by the use of tables and figures.

Findings: This study revealed that 61.7% of the students were satisfied with the clinical placements as it provided a positive learning environment, while 84% reported they had the opportunity to transfer theory into practice. In addition, 59.1% were satisfied with the hands-on experience they had in the clinical area however, 58.3% were dissatisfied with the use of Evidence-based practice and 54.8% were dissatisfied with the involvement of lecturers in clinical training.

Unique Contribution to Theory, Practice and Policy: This study tested the Kolb Experiential model where for learning to take place the students need to go through concrete experience, reflective observation, abstract conceptualization and active experimentation. This study is in support of this model that for effective learning to take place the student has to undergo all the learning cycle. In policy, this study recommends the need to equip health facilities and employ more nurses in the hospitals who will also act as mentors to students and improve these facilities into teaching and referral centres. In practice, hospitals should identify clinical mentors who will oversee the implementation of Evidence-Based Practice and critical thinking into the nursing practice, while, institutions should employ more clinical instructors, and identify clinical mentors and preceptors in the clinical learning environments.
The Reality of Credit Risk on Threat of Financial Performance of Tier IV Commercial Banks in Kenya
Authors: Roselyne Ayiro , Kiganda Evans , Mackton Wanyama
Published: October 2022

Purpose: Commercial banks in Kenya have put in place several credit policies and strategies to reduce non-performing loans. The capacity of a bank to grow its loan in the year is largely determined by its asset quality and efficiency. Regrettably, the measures put in place by many banks to improve asset quality and efficiency seem to bear little fruits particularly in tier IV commercial banks have been recording declining performance over the recent past. The aim of the study was to establish the influence of credit risk on financial performance of tier IV commercial banks in Kenya.

Methodology: The study was guided by scientific theory of management, Transaction cost theory and Contingency theory. This study employed longitudinal research design. The target population was 13 tier IV commercial banks in Kenya as at 2022 from Central bank of Kenya website. A secondary data collection sheet assisted in tabulating secondary data from audited financial statements which were downloaded from the Central Bank of Kenya website. Panel Data analysis technique was employed to establish the relationships through STATA.

Findings: Pearson’s product moment correlation coefficient depicted r = -0.4306, p-value of 0.0000 which is significant for credit risk. The regression model had a p-value of 0.0000, indicating that it was significant and reliable. An R2 of 0.3799 was produced by the random effect model indicating that financial imperative contributes 37.99% to financial performance of tier IV commercial banks. The regression coefficients were -0.13 with a p-value 0.004< 0.05), credit risk (CR) and financial performance (ROE) at 5% level of significance. These results indicate that credit risk had significant influence on financial performance.

Recommendation: It was recommended that commercial banks should properly manage credit risk; prompt recovery of loans is also recommended to reduce loan impairment charges.
An Analysis of Daily Trust Newspaper in The Promotion of Girl Child Education in Northern Nigeria
Authors: Similola Adidu Anita
Published: October 2022

Girl child education has been a problem in most developing countries, Nigeria inclusive. The problem of the Nigerian girl child is the cultural web in which she is caught which makes it impossible for her to compete with her peers in the developed world. Various studies have shown that there is a strong link between girls’ literacy rates and religious and traditional misconceptions. As Nigeria is a very religious country, many of its citizens tend to live according to the holy writings, be it the Bible or Quran. That is why many households think that girls should not receive education in the same way boys do, if they receive it at all. The same can be said for traditions. Many people still live with a very traditionally biased view on life. According to this view, a girl should grow up to be a mother and a housewife. Why would she need education for that? Out of these reasons stems another one: gender discrimination. Girls are discriminated based on their gender both in their communities and in schools. Their achievements are not considered as significant as the boys’ achievements are. Women’s history is not taught at schools. Less attention is paid to educating girls on the topics of their bodies and their health. In line with this background, this research work was conducted to determine the role of the print media (Daily Trust Newspaper) in promoting the girl child education through its publicities and to what extent. Internet based method was used to gather data which were analysed using descriptive method and simple percentage. The population of the study is 391 weekly editions (educational stories) within 12 months (September 2020-October 2021). The findings revealed that educational issues are paid the least attention to in news coverage in Daily Trust Newspaper when compared to other issues. It was recommended among others that the print media should make conscious effort to ensure a wider and consistent coverage of educational issues to sensitise policy makers, and other stakeholders on the importance of girl child education as this will ensure the provision of solutions to problems affecting girl child education, promoting national development.
Effectiveness of Collaborative Strategic Reading Instruction for Tertiary level English as a Second Language (ESL) learners
Authors: Galappaththy Kasun Vindika , Karunarathne Purnima
Published: October 2022

In the process of language learning, Reading is considered a fundamental skill as it is the only means of access to written documents in a language (Alderson, 2000). With sound proficiency in reading, learners, especially at tertiary level, can achieve their academic and professional goals. This study was carried out in order to investigate the effectiveness of Collaborative Strategic Reading Instruction Approach (CSR) which is a learner centered reading approach closely related to cooperative learning theory (Klingner and Vaughn ,1996; 1998; 2000). The informants of the study were 67 lower intermediate level undergraduates from the University of Peradeniya. Data was collected through the mixed method approach. The qualitative data of the experiment demonstrated that collaborative work during the reading activities lead the learners to learn and think significantly more and better. However, the statistical analysis did not prove this method as a better method than the traditional teaching method. Thus, pedagogical implications for English instruction at university level in Sri Lanka and suggestions for future research based on the findings to further validate the impact and effectiveness of collaborative learning are proposed.
Psychosocial Effects of Covid-19 on Mental Health: A Case of Hillside Residents, Harare
Authors: Nyakonda Ashley
Published: October 2022

The main purpose of the study was to investigate the psychosocial effects of COVID-19 on mental health of residents in Hillside in Harare. The specific objectives were finding out about the psychosocial effects of COVID-19 on Hillside residents, determining the awareness level of the psychosocial effects of COVID-19 on mental health amongst Hillside residents, finding out mechanisms employed by Hillside residents to cope with the psychosocial effects on mental health arising from COVID-19 and soliciting solutions on how best the COVID-19 mental health challenges can be alleviated. The research adopted a survey research strategy focusing on Hillside residents and data was collected using self-administered questionnaires from 102 respondents in Hillside in Harare. The data was then analyzed using percentages and findings from the research indicated that job insecurity, financial loss, stigmatization, infobesity and alienation due to social distancing were the main psychosocial effects of COVID-19 on Hillside residents. The research thus recommended that government should extend social support to vulnerable groups and increase awareness about psychosocial effects of COVID-19 on mental health and appropriate coping mechanisms. Similarly, individuals were urged to seek information about COVID-19 from reputable sources and adopt positive coping mechanisms to fight against mental health effects of the pandemic.
An Introduction to Modernity as it is evident in Sri Lankan Society (A Study Based on Modern Sinhala Fictions)
Authors: Ranaweera Dr. Kumudu Karunaratne
Published: October 2022

As a consequence of the socio-economic changes that took place in Sri Lanka during the colonial era, traditional socio-economic institutions which had been executed in the past underwent a notable transformation. The emergence of new social institutions coupled with the development of a navel form of social order reached its climax under the British colonial regime. This movement contributed to introduce vast range of economic and social changes in the Lankan society during the early nineteenth century and came to be termed later as the modern period. The present study is an attempt to examine how this transition is reflected realistically in fictions pertaining to that period. For this study Marxist theory on socio-economics factors and subaltern theory is adopted in reviewing literary perspective of the contemporary society. Qualitative data analysis was the method followed in analyzing data. Proliferation of new towns was seen as an outcome of industrialization and urbanization, which eventually became the hub of business enterprises and administrative activities. These newly cropped up establishments gradually grew up exerting a great influence on the daily activities of the people of all walks of life. An in-depth study suggests that the tone of the pre-colonial Sinhala fiction, in content-wise and vision-wise was a far cry from its post-colonial counterpart. The objective of the present study is to demonstrate how far it was successful in portraying this transitionary process in a realistic perspective.
THE EFFECT OF LABORATORY-BASED LEARNING STRATEGIES AND MATHEMATIC LOGICAL INTELLIGENCE ON LEARNING OUTCOMES OF LINEAR ALGEBRA COURSES
Authors: Dafid Darmin , Wibawa Basuki , Situmorang Robinson
Published: October 2022

This study aims to: (1) analyze the difference in the mean difference that laboratory-based learning is better than the RME (Realistic Mathematics Education) learning strategy and DL (Direct Learning) learning strategy. Methods This research uses quantitative research with experimental methods is 3×2 factorial with three levels of qualification of independent variables: laboratory-based learning strategies, Realistic Mathematics Education (RME) learning strategies, and Direct Instruction (DI) strategies. The results of this research are Differences in learning outcomes for linear algebra courses between students who are taught using laboratory-based learning strategies and students who are trained using DL (Direct Learning) learning strategies, and those prepared using RME (Realistic Mathematics Education) learning strategies. The average difference value (mean difference) that laboratory-based learning is better than the RME (Realistic Mathematics Education) learning strategy and DL (Direct Learning) learning strategy. Linear Jabar on students with high and low mathematical and logical intelligence. This is in line with the explanation that knowledgeable people will more readily accept or understand lessons. There is an interaction between learning strategies and logical-mathematical intelligence on linear algebra learning outcomes. Based on the study results, it is explained that the collaboration between learning strategies and logical-mathematical intelligence is a form of interaction or influence of learning strategies on learning outcomes of linear algebra courses on mathematical, logical intelligence, or vice versa.
The Legality of Virtual Trials in the Indonesian Criminal Law System
Authors: Budiono Arief , Utomo Bagus Fakhri
Published: October 2022

The existence of this pandemic certainly has an impact on several things, one of which is in the legal realm, namely trials that are conducted virtually or online. Therefore, in this paper, we will discuss the implementation of virtual trials in Indonesian criminal law with several problem formulations, namely how the mechanism is carried out in the application of virtual court law in overcoming all criminal problems that exist in Indonesia, then in this study will discuss about What legal basis underlies the implementation of this virtual trial in Indonesia when examined in the Indonesian criminal law system. This research uses a qualitative normative legal research type. Normative legal research is a legal research conducted in a way such as conducting research on library materials or secondary data. In this research, law is often conceptualized as something that is written in legislation or as a norm which is a benchmark for human activities that are considered appropriate. The results of this study are first, trial activities are also influenced by various problems due to the Covid-19 pandemic, namely in the criminal process on the grounds that the limited period of detention is the basis for the Supreme Court of the Republic of Indonesia to establish a virtual trial in accordance with the Regulation of the Supreme Court of the Republic of Indonesia Number 1 Year 2019 on trial procedures but not in criminal justice.
The Impact of Foreign Investment on the Indonesian Economy
Authors: Yuspin Wardah , Muhammad Fadil
Published: October 2022

Law No. 25 of 2007 concerning Foreign Investment was created to have several objectives, in which these objectives function to advance the economy in this country of Indonesia. Basically, Foreign Investment is a form or concrete step which in practice provides many benefits to the Indonesian economy but also does not provide a small amount of loss in the economic sector and in other sectors. The purpose of writing this article is to examine more deeply from a legal perspective regarding the impacts of foreign investment on Indonesia's economic development.
History, Development of Commercial Law in Indonesia and Their Correlation with the Book of Civil Law
Authors: Yuspin Wardah , Febriyanti Nur Ilmi Putri
Published: October 2022

This article discusses the history and development of commercial law in Indonesia and its correlation with the civil code law. This article uses literature research. Commercial law is the law that regulates the behavior of humans who participate in trading for profit or the law that regulates legal relations between humans and legal entities with each other in the trading field. Generally, the development of commercial law is divided into three stages, namely the lex mercatoria period in the Middle Ages, the incorporation of the lex mercatoria into the national legal system, and the new lex mercotaria period. In essence, lex mercotaria is a concept in Latin that is used to communicate a set of principles or principles that apply to traders in Europe in general. When viewed from the perspective of its function, lex mercotaria is actually an international trade law which, among other things, emphasizes the separation of assets and contractual freedom, applies to traders from various parts of the world who establish trade relations with the citizens of the kingdom along the route that crosses the boundaries of territorial sovereignty. . based on the principle of concordance, the KUHD Netherland 1838 became an example for the making of the Indonesian KUHD in 1848. Initially, commercial law was based on civil law. However, over time the commercial law codified the legal rules so that the Commercial Law Code was created which is now independent or can be said to be separate from the Civil Law Code. The Commercial Law Code has a relationship with the Civil Law Code as explained above that as a result of the codification, commercial law is part or a branch of civil law, but in a more specific form. Thus, the Civil Code becomes a special source of civil law. The relationship between the two laws is the genus (general) and species (special).
Distributed Leadership and Positive Behaviour Management in Ghanaian High Schools: Contextualisation of theory and practice
Authors: Ibrahim Mohammed Gunu
Published: October 2022

There is an increasing interest in school leadership's ability to maintain school discipline whilst protecting students' rights and dignity as well as self-esteem. The accelerating interest in school leadership's ability to maintain a disciplined school is anchored on the belief that school discipline determines student learning outcomes. Whilst there is the need for effective leadership behaviour to propel Positive Behaviour Management in Secondary is widely acknowledged, there is no accessible literature on the leadership behaviour which can produce the desired behaviour. This research aimed to explore the theoretical underpinning of Distributed Leadership and Positive Behaviour Management and the empirical evidence of using these concepts in developing successful schools. The findings of the research demonstrated that the link between Distributed Leadership and Positive Behaviour Management is positive and significant. This understanding has implications for how Positive Behaviour Management is conceptualized and implemented in schools by school leaders and teachers.
THE BRAIN'S RELATIONSHIP TO MENTAL DISORDERS
Authors: Abreu Agrela Rodrigues Fabiano de , Espírito Santo Wagner Roselene do
Published: October 2022

Mental disorder is a dysfunction of brain activity that can affect an individual's mood, behavior, reasoning, learning, and communication. It is a silent disease that can be present at any stage of life. Its reflexes occur at the psychological level and may have physical symptoms, depending on the stage of the illness. Commonly associated with suffering are anxiety disorders, depression, panic syndrome, chemical dependency, bipolar disorder, and others.  Each individual manifests his or her pathology in a unique way, and the management must also be personalized.  The disorder has multiple causes, such as genetic inheritance, environment, culture, emotional impacts, traumas, phases of the life cycle, among other aspects.  Therefore, its treatment requires a multidisciplinary team, with professionals such as psychologists, psychiatrists, speech therapists, and, in the school environment, when it comes to learning, a psychopedagogue, an extremely important professional for the student and his family. When the manifestation of the disorder happens in the school phase, teachers are key, since school is a very familiar environment and functions as the second home and family representation. Teachers have the possibility to observe and identify the student's problem; they spend many hours with the student daily, transfer knowledge, and identify the student's emotional state, attention focus maintenance, memory, engagement, motivation, mood and behavior changes.  They are the first to notice learning difficulties or inability presented by some individuals when facing new situations, triggered by several factors
ESTÁGIO SUPERVISIONADO DE BIOLOGIA EM UM CONTEXTO PÓS ENSINO REMOTO EMERGENCIAL - UM RELATO DE EXPERIÊNCIA
Authors: Alves Richard Tarcísio de Lima , Sousa Micaelle Thaís Barros de , Azevedo Thiago Anderson Oliveira de , Ribeiro Lilian Arruda
Published: October 2022

INTRODUÇÃO: Em 30 de Janeiro de 2020 foi decretada a pandemia de COVID-19, de forma que como medida de combate ao Coronavírus, as instituições de ensino substituíram suas aulas presenciais pelo ensino remoto emergencial, entretanto, em 2021 as aulas aos poucos foram retornando ao presencial. OBJETIVO: Descrever a experiência de um licenciando em biologia no período de estágio supervisionado em um contexto pós pandêmico. MATERIAL E MÉTODOS: Trata-se de um relato de experiência, de caráter descritivo, realizado a partir das vivências do estagiário. O presente trabalho foi realizado por um estudante de licenciatura em Ciências Biológicas durante o seu período de estágio. RESULTADOS E DISCUSSÃO: Foram ministradas um total de 19 aulas entre turma de segundo e terceiro ano, distribuídas entre o turno da manhã e da tarde. A principal metodologia usada eram as aulas expositivas dialogadas, de forma a estimular a participação dos estudantes, contribuindo para uma aprendizagem significativa. O estagiário também desenvolvia atividades extraclasse, de forma que essas experiências foram de importante contribuição para a formação profissional do discente estagiário. CONSIDERAÇÕES FINAIS: Torna-se evidente a importância que o estágio representa para o licenciando, ofertando momentos em que o estagiário pode conhecer a realidade da sala de aula, observar problemas e refletir sobre possíveis modos de mitigar estes desafios.
PERCEPÇÃO DA QUALIDADE DE VIDA DE PRATICANTES DE HIDROGINÁSTICA NO MUNICÍPIO DE CARLOS CHAGAS – MG
Authors: Azevedo Espíndula Késia , Brandão Amorim Patrícia
Published: October 2022

RESUMO: Introdução: A hidroginástica é uma atividade corporal realizada no ambiente aquático que proporciona diversos benefícios físicos e para a saúde, tem sido apontada como uma alternativa para inserção dos idosos e para a promoção de um estilo de vida mais ativo e saudável. Objetivo: O objetivo deste artigo é analisar a qualidade de vida de praticantes de hidroginástica no município de Carlos Chagas – MG. Metodologia: Trata-se de uma pesquisa descritiva exploratória de método quantitativo, realizada com 51 pacientes, de ambos os sexos, com idade entre 40 a 78 anos. Resultados:  31,4% são homens e 68,6% mulheres, os resultados indicam que os usuários são satisfeitos com a sua saúde, 54,9% relatam que não sentem dor física, 23,5% sentem pouca dor física, 15,7% sentem dor razoável e 5,9% sentem muita dor física, eles consideram a sua saúde muito melhor após a participação da hidroginástica, 31,4% praticam a hidroginástica entre 1 a 2 anos, 43,1% entre 2 a 4 anos e 25,5% a mais de 4 anos, os principais benefícios observados com prática da hidroginástica 31,4% sentiram alívio das dores, 17,7% melhora da força muscular, 13,7% melhora da flexibilidade, 9,8% maior enfrentamento de dificuldades, 7,8% maior mobilidade. Conclusões: Conclui-se que a hidroginástica é uma opção importante para a prática de exercício físico, tendo em vista que proporciona uma melhora na qualidade de vida. Os indivíduos praticantes de hidroginástica demonstram uma melhora na expectativa de vida e saúde comparados aos indivíduos inativos.
A ATUAÇÃO DA ENFERMAGEM OBSTÉTRICA NO PRÉ-NATAL EM AMBIENTE PRISIONAL
Authors: Maria Ferreira de Lima Brenda , Ruam Nascimento Thiago , Mariah Araujo de Paula Oliveira Ayanne , Cristina Menezes Bezerra Cintia , Marques Garcia Junior Fábio , Gomes Neto João , Grasielly da Silva Santos Lavinia , Carolina Cabral Freitas Maria , Eduarda Luna da Silva Steffanie , Eugênia Lopes Lima Eunara
Published: October 2022

O presente trabalho aborda sobre a atuação do enfermeiro no pré-natal em mulheres privadas de liberdade, sendo possivel perceber que o enfermeiro é de suma importância dentro do sistema de cárcere privado para garantir segurança e bem-estar para a mãe e o feto. Sendo constatado, por meio do CNJ (Conselho Nacional de Justiça) que é um serviço que ainda necessita passar por várias mudanças devido ao serviço precário que é prestado, já que as mulheres em situação de liberdade possuem o direito de ir a uma Unidade Básica de Saúde e serem acompanhadas por um profissional de saúde, enquanto as mulheres que vivem no sistema prisional dependem de o profissional ir até elas, o que por muitas vezes não ocorre ou acontece com dificuldades.
Entorno virtual de aprendizaje en la gestión pedagógica en instituciones educativas privadas en Huancayo, Perú
Authors: Cóndor Pielago Mariluz Tomasa , Santos Jiménez Ofelia Carmen , Solís Toscano José Luis
Published: October 2022

A lo largo de los años, las tecnologías de la información y la comunicación se han especializado, en la misma medida que la capacitación virtual. Así, "Los entornos virtuales de aprendizaje han dado un paso en la evolución pedagógica al mejorar los procesos de enseñanza-aprendizaje" Silva, J. (2011).

Sin embargo, observamos que la crisis global en la que estamos inmersos por el Coronavirus (COVID-19) ha requerido cambios inmediatos en la práctica docente. Acelerando la entrada en la virtualidad que pocos docentes conocían en la provincia de Huancayo Yangali, L. (2020). Por lo tanto, este estudio de investigación se desarrolló para determinar la relación entre el entorno virtual de aprendizaje y la gestión pedagógica en instituciones educativas privadas en Huancayo, Perú.  Responde a la investigación de enfoque cuantitativo, con un nivel descriptivo, de tipo básico, con diseño transversal no experimental correlal.  La muestra conformó 108 docentes de ambos sexos de entre 20 y 65 años de la provincia de Huancayo. Este estudio se basó en el muestreo intencional no probabilístico por accesibilidad. La técnica fue la encuesta y se administraron dos cuestionarios: un cuestionario para medir la variable entorno virtual de aprendizaje compuesto por 36 ítems y otro relacionado con la gestión pedagógica de 19 ítems. La validez y fiabilidad de los instrumentos se obtuvo a través de la técnica Alpha de Cronbach y el juicio experto. Los resultados cuando se aplicó la prueba estadística de Pearson indican que existe una alta correlación (0,884) entre el entorno virtual de aprendizaje y la gestión pedagógica, la planificación curricular (0,759), las unidades de aprendizaje (0,742), las sesiones de aprendizaje (0,784) y los medios y materiales didácticos (0,825). En conclusión, afirmamos que el entorno virtual de aprendizaje está positivamente relacionado con la gestión pedagógica en instituciones educativas privadas en Huancayo, Perú. Concluimos esta herramienta que proporciona comunicación síncrona y asíncrona en la gestión de materiales, gestión de todos los participantes y ofreciendo desde el ámbito docente, apoyo tecnológico a profesores y alumnos en cuanto a: proceso de enseñanza – aprendizaje.  Bautista, G., Borges, F. & Fores, A. (2006).
Análisis de la cadena productiva del café diferenciado para exportación en el departamento de Quetzaltenango, Guatemala, para la aplicación de un modelo de planificación de proyectos productivos
Authors:   Universidad Internacional Iberoamericana. México, PEREZ-GODINEZ Raul E. , FUENTE Alejandro ,   Universidad Internacional Iberoamericana. México
Published: October 2022

La presente investigación se centra en efectuar un análisis de la cadena productiva del café diferenciado en el departamento de Quetzaltenango, Guatemala, para obtener información relevante de sus actividades económicas para, posteriormente, elaborar un modelo de planificación de proyectos productivos a partir de la metodología del PMI a través de su guía PMBOK. El modelo desarrollado fue implementado en una empresa exportadora (commodities agrícolas) para determinar su eficacia en la obtención de resultados en el ámbito de la gestión empresarial.
An Enhanced Software Framework for Improving QoS in IoT
Authors: Tomer U. , Gandhi P.
Published: October 2022

Internet of Things (IoT) and Artificial Intelligence (AI) with its subcomponents are the latest emerging technologies that make our daily lives easier. Quality of Service (QoS) plays a very important role in IoT due to the large number of interconnected nodes. QoS is inversely dependent on the node count, i.e. the increment of nodes causes hampering to QoS, as increasing the number of nodes increases the number of requests to the IoT server. An enhanced framework is strongly needed to control QoS in IoT applications. This study proposes and implements an enhanced framework using Matlab, to control the number of requests. The proposed model can improve QoS parameters like throughput, latency, and packet loss by reducing the number of requests generated by the end nodes without compromising the services to the end user. The results showed that QoS parameters improved in terms of throughput by 5-10%, packet loss by up to 6%, and packet latency by 4%. This model can also be tested in hardware and may provide a better QoS solution.
A Numerical Model for Heat and Moisture Transfer in Porous Media of Building Envelopes
Authors: Scussiato T. , Ito W. H. , Ramis J. , Braga de Queiroz P. I.
Published: October 2022

This study presents a one-dimensional quantitative analysis of unsaturated flow in natural stones using a numerical model (Finite Difference Method) and a mass balance for the heat flow. For that, we considered heat and moisture transfer between the external environment and a porous media (sandstone and limestone) with homogeneous characteristics. For unsaturated water flow, Richards’ equation and the formulation proposed by Gardner for volumetric water content and hydraulic conductivity were considered. The results of the numerical analysis showed that the evaporation of porewater throughout summer days (January 3rd and 4th) considerably reduced the temperature of the roof by about 8°C. The accumulated conductive heat flow and the volumetric water content were also reduced due to the evaporation process. This fact indicates that evaporation can be useful in providing thermal comfort and, consequently, in improving the energy efficiency of buildings with natural stones as envelopes.
Langmuir-Hinshelwood-Hougen-Watson Heterogeneous Kinetics Model for the Description of Fe (II) Ion Exchange on Na-X Zeolite
Authors: Kamal S. K. , Abbas A. S.
Published: October 2022

This study aimed to investigate the kinetics of the anion exchange step of ferrous ions with Na-X zeolite in a temperature range of 20 and 80°C for a period of up to 8 hours. A ferrous sulfate heptahydrate solution was used as a ferrous ion source to exchange with the sodium of the Na-X zeolite. The results showed a change in the physical appearance of the zeolite with the progress of the ion exchange process. The catalyst color was observed with the progress of the ion exchange time and changed from yellow to brown. The ferrous ion exchanged contents increased with temperature and reached 0.519 at 80°C after 8 hours. A kinetic model based on the Langmuir-Hinshelwood-Hougen-Watson model was suggested and developed to describe the ion-exchange process. The proposed model was solved numerically, and the results indicated its ability to describe the experimental results with high correlation coefficients. Finally, the activation energy for the forward reaction was 31590.7J/mole compared to 28105.5J/mole for the backward, and the frequency factors for the forward and backward reactions were investigated.
Improvement of Sliding Mode Control Strategy Founded on Cascaded Doubly Fed Induction Generator Powered by a Matrix Converter
Authors: Maafa A. , Mellah H. , Ghedamsi K. , Aouzellag D.
Published: October 2022

The current paper presents a Sliding Mode Controller (SMC) for indirect field-oriented Cascaded Doubly Fed Induction Generator (CDFIG) powered through a Matrix Converter (MC). The proposed SMC employs a continuous control strategy to accomplish free chattering fractional-order sliding-mode control and to ensure that the control of the first DFIG stator's reactive and active power is separated. An MC is used to control the current provided to the second stator of the CDFIG as an alternative to standard voltage source inverters. The two MCs are controlled via Space-Vector Pulse-Width Modulation (SVPWM) and Indirect Field Oriented Control (IFOC). The proposed Wind Power Generation System (WPGS) is used with the purpose to ensure Maximum Power Point Tracking (MPPT) sensing under various disturbance variables such as turbulent wind. The simulation results prove the efficiency and robustness of the proposed method.
Application of a Seat-based Booking Control Mechanism in Rail Transport with Customer Diversion
Authors: Bulum A. Z. , Dugenci M. , Ipek M.
Published: October 2022

The ticket booking control mechanism is a part of the Revenue Management (RM), commonly used in the airline industry. This study aims to optimize seat allocation in the railway industry and compare the performance of three booking control techniques by considering customer behavior. The preferences of customers who cannot find their desired ticket are considered as a customer diversion matrix, which also includes waiting and no-purchase probability. Α Ticket Booking System (TBS) with buckets, which assigns seats to buckets, was adapted and implemented on the Turkish railway for the first time. A genetic algorithm that is specifically written to apply the TBS, including customer diversion, is used in simulations to obtain approximate solutions. It is seen that TBS gave successful results with a revenue increase of around 5.8%. We can also suggest, considering customer behavior, that the revenue can be raised by sales in periods.
Non-Profit Organization Project Selection Process Using the Hygiene Method of Multi-Criteria Decision Making
Authors: Radhi A. R. , Burhan A. M.
Published: October 2022

With the fast increase in technological development and society's needs, using Multi-Criteria Decision Making (MCDM) as a solution to tackle problems faced during a project's life cycle in different engineering fields gains interest. The use of artificial intelligence gave new opportunities to deal with problems faced during the optimization of unknown or known solutions and methods. Even more, the application of optimized solutions can be developed or modified by using different optimization approaches and methods. This paper proposes a model for the project selection process for non-profit organizations that have a limited budget and social factors strictly related to the selection process. This method is based on MCDM and takes into consideration criterion weights and experts' evaluation of projects according to the selection criteria using the hygiene method consisting of two stages, fuzzy logic, and TOPSIS.
Correlation Analysis of Earthquake Intensity Measures and Engineering Demand Parameters of Reactor Containment Structure
Authors: Vu X. H. , Nguyen T. T. T. , Phan V. L. , Nguyen D. D.
Published: October 2022

This study aims to analyze the correlation between earthquake Intensity Measures (IMs) and seismic responses of a reactor containment building in an APR-1400 nuclear power plant. A total of 20 IMs were employed to develop Seismic Demand Regression Models (SDRMs), which show the relationship between IMs and engineering demand parameters. A numerical model of the structure was constructed using the Lumped-Mass Stick Model (LMSM) in SAP2000. Additionally, a three-dimensional finite element model was developed to validate the simplified LMSM approach. A set of 90 ground motion records was used to perform a time-history analysis, where the motions cover a wide range of amplitude, intensity, epicenter distance, significant duration, and frequency of earthquakes. Engineering demand parameters were monitored in terms of floor accelerations and displacements. Consequently, strongly correlated IMs were identified based on the evaluation of SDRMs using four statistical indicators: coefficient of determination, standard deviation, practicality, and proficiency. The results showed that the strongest IMs were Sa(T1), Sv(T1), and Sd(T1) followed by ASI, EPA, PGA, and A95. On the other hand, the weakly correlated IMs were PGD, DRMS, SED, VRMS, PGV, HI, VSI, and SMV.
A Theoretical-Experimental Study of the Influence of FDM Parameters on PLA Spur Gear Stiffness
Authors: Zisopol D. G. , Iacob D. V. , Portoaca A. I.
Published: October 2022

This paper studies the influence of FDM (Fused Depositing Modeling) parameters on gear stiffness made of Polylactic Acid (PLA). 3D printing parameters must be optimized because they influence the physical, mechanical, and quality characteristics of the additive manufactured part along with its functionality. The objective of this research is to optimize FDM parameters in order to obtain the highest stiffness. In this context, we used Finite Element Analysis (FEA) and we made experimental tests to validate its results. The experimental tests are divided into two categories, gears with the same parameters and gears with the same layer height and variable filling percentage. The average results of gear stiffness with the same parameters are 8.18% highest than the average results of gear stiffness with the same layer height and variable filling percentages.
Analysis of Particulate Matter Emissions and Performance of the Compression Ignition Engine Using Biodiesel Blended Fuel
Authors: Bhangwar S. , Ghoto S. M. , Abbasi A. , Abbasi M. K. , Rind A. A. , Luhur M. R. , Khan Z. , Rajput U. A. , Mastoi S.
Published: October 2022

As the world becomes more urbanized, the market for petroleum products increases. The supply of crude oil-based products such as diesel, gasoline, and natural gas is limited. Furthermore, natural resources are finite and their reservoirs are located in certain parts of the globe. Countries with low to no fossil fuel resources are experiencing a scarcity of petroleum products, necessitating the exploration of alternative energy resources. In this research, tests regarding the exhaust particulate emission, sound pressure level, and performance have been carried out using samples from diesel and biodiesel (waste cooking oil) blended fuel. Two fuel samples have been used, B25 (biodiesel 25% and 75% diesel) and 100% diesel as a baseline in a CI engine at constant RPM of 1350 and variable loads of 0.0 to 1.6 at an interval of 0.2Kg-m. The results show that particulate emissions are reduced by about 7.29% when using biodiesel blended fuel, whereas brake-specific fuel consumption of biodiesel blended fuel has decreased as brake power increased, and brake thermal efficiency increased as brake power increased. The sound pressure level was measured from different locations of the engine (back, front, left) and for varying load. The results show that B25 produces less noise than D100 in each case.
Implementation of a High Power Quality BLDC Motor Drive Using Bridgeless DC to DC Converter with Fuzzy Logic Controller
Authors: Gopan K. V. , Shree J. D.
Published: October 2022

Electric motor drives based on electronic power converters having good power quality parameters are getting huge acceptance. Conventional Diode Bridge Rectifier (DBR) and DC to DC converter-based methods have become obsolete, as they provide low power quality indices which hamper the supply by introducing current harmonics and conduction losses. Although there are many developments in motors and control strategies, the risk and complexity of such drives become bottlenecks in implementation. This study implemented a drive scheme with a brushless DC Motor. The new improved bridgeless topology was modified with an advanced fuzzy logic controller to further improve its power quality and performance. Due to low power, a high-speed application of Brush Less (BLDC) motor was selected for the drive scheme. This combination could achieve almost Unity Power Factor (UPF) and significantly improve control compared to conventional topologies. A circuit-wise analysis was conducted to design the converter's components. The modifications were elaborated through mathematical expressions, and the parameters of power quality were analyzed and validated.
Heat Transfer Enhancement in a Receiver Tube of Solar Collector Using Various Materials and Nanofluids
Authors: Guerraiche D. , Guerraiche K. , Driss Z. , Chibani A. , Merouani S. , Bougriou C.
Published: October 2022

The solar flux distribution on the Parabolic Trough Collector (PTC) absorber tube is extremely non-uniform, which causes non-uniform temperature distribution outside the absorber tube. Therefore, it generates high thermal stress which causes creep and fatigue damage. This presents a challenge to the efficiency and reliability of parabolic trough receivers. To override this problem, we have to homogenize the heat flux distribution and enhance the heat transfer in the receiver’s absorber tube to improve the performance of the PTC. In this work, 3D thermal and thermal stress analyses of PTC receiver performance were investigated with a combination of Monte Carlo Ray-Trace (MCRT), Computational Fluid Dynamics (CFD) analysis, and thermal stress analysis using the static structural module of ANSYS. At first, we studied the effect of the receiver tube material (aluminium, copper, and stainless steel) on heat transfer. The temperature gradients and the thermal stresses were compared. Second, we studied the effect of the addition of nanoparticles on the working Heat Transfer Fluid (HTF), employing an Al2O3-H2O based nanofluid at various volume concentrations. To improve the thermal performance of the PTC, a nanoparticle volume concentration ratio of 1%–6% is required. The results show that the temperature gradients and thermal stresses of stainless steel are significantly higher than those of aluminium and copper. From the standpoint of thermal stress, copper is recommended as the tube receiver material. Using Al2O3 in water as an HTF increases the average output temperature by 2%, 6%, and 10% under volume concentrations of 0%, 2%, and 6% respectively. The study concluded that the thermal efficiency increases from 3% to 14% for nanoparticle volume fractions ranging from 2% to 6%.
A Hybrid Metaheuristic and Deep Learning Approach for Change Detection in Remote Sensing Data
Authors: Slimani Y. , Hedjam R.
Published: October 2022

This study aimed to adapt Convolutional Neural Networks (CNN) to solve the problem of change detection using remote sensing imagery. Specifically, the goal was to investigate the impact of each CNN layer to detect changes between two satellite images acquired on two different dates. As low-level CNN layers detect fine details (small changes) and higher-level layers detect coarse details (large changes), the idea was to assign a weight to each layer and use a genetic algorithm based on a training dataset to generalize the detection process on the test dataset. The results showed the effectiveness of the proposed approach based on two real-life datasets.
Pelatihan MPKP untuk Meningkatkan Pengetahuan Perawat tentang MPKP di RSJ Grhasia Yogyakarta
Authors: Pramono Hadi , Sudiharja S , Suryana Unang
Published: October 2022

The professional nursing practice model (MPKP) is one of the efforts to improve the quality of nursing services. Knowledge is one of the important factors to support the optimal implementation of MPKP. The purpose of this study was to increase nurses' knowledge about MPKP and the implementation of MPKP in Grhasia Hospital through MPKP training. This research is a quantitative research with a pre-experimental design. The approach used is one group pretest and posttest design. Respondents in this study were all 37 Grhasia Hospital nurses who attended MPKP training. the average knowledge of nurses about MPKP before the training was 71.62, then after the MPKP training the average knowledge of nurses became 128.11. The results of the normality test showed that there was an abnormal distribution of the data so that the bivariate analysis used the Wilcoxon test. Based on the results of the Wilcoxon test, a p-value of 0.000 was obtained, so it can be concluded that MPKP training can increase nurses' knowledge about MPKP. Researchers consider it necessary to do further research on the implementation of MPKP in Grhasia Hospital Yogyakarta.
Antioksidan Ekstrak Etanol dan Fraksi Akar Rhyzopora stylosa Metode ABTS dan FRAP
Authors: Raharjo Danang , Listyani Tiara Ajeng , Pambudi Dwi Bagus
Published: October 2022

Rhyzopora stylosa atau sering disebut bakau kecil oleh masyarakat pesisir sering digunakan untuk mengobati berbagai macaam penyakit diantaranya  diabetes, ulkus, diare analgetik, radang, nyeri dan mempercepat penyembuhan luka. Penelitian ini bertujuan untuk meneliti kadar senyawa flavonoid dalam ekstrak etanol akar Rhyzopora stylosa dengan metode komplek AlCl3 dan aktivitas antioksidan dengan metode ABTS  (2,2 azinobis (3-etilbenzotiazolin)-6-asam sulfonat) dan FRAP (Ferric Reducing Antioxidant Power) terhadap ekstrak etanol dan 3 fraksi akar Rhyzopora stylosa. Ekstraksi dilakukan dengan metode maserasi dengan etanol 96% sebagai pelarut. Fraksinasi dilakukan dengan partisi cair-cair dengan pelarut etanol, n-heksane dan etil asetat. Penetapan kadar flavonoid diukur dengan komplek AlCl3 dengan kuersetin sebagai baku pembanding. Aktivitas antioksidan ditentukan dengan metode ABTS dan FRAP. Dari pengujian kadar flavonoid didapatkan hasil  kadar flavonoid dalam ektrak etanol akar Rhyzopora stylosa sebesar 18.803 ± 0.198 QE. Aktivitas antioksidan dengan metode ABTS dan FRAP didapatkan fraksi etil asetat memiliki aktivitas antioksidan tertinggi dengan nilai masing-masing 18,553 ± 1,440 ppm dan 24.636 ± 0.128 mgAAE/g. Berdasarkan tabel aktivitas antioksidan fraksi etil asetat termasuk dalam kategori antioksidan yang sangat kuat karena kurang dari 50 ppm
PENGARUH EDUKASI SYNCOPE DENGAN METODE JIGSAW TERHADAP TINGKAT KESIAPAN PENANGANAN PERTAMA SYNCOPE PADA SISWA JURUSAN ASISTEN KEPERAWATAN
Authors: Hanarul Jesyifa Tasya , Fitriyani Noor
Published: October 2022

Syncope adalah hilangnya kesadaran dan kekuatan postural tubuh secara mendadak akibat berkurangnya aliran darah ke otak yang dapat terjadi pemulihan secara spontan. Ketidaktepatan penanganan pertama syncope berdampak cedera atau bahkan kematian. Hal tersebut disebabkan karena kurangnya pengetahuan dan kesiapan. Edukasi metode jigsaw merupakan salah satu upaya untuk memberikan informasi melalui diskusi dan kolaborasi dengan teman yang berlatar belakang berbeda. Penelitian ini bertujuan mengetahui pengaruh edukasi syncope dengan metode jigsaw terhadap tingkat kesiapan penanganan pertama syncope pada siswa jurusan asisten keperawatan. Desain penelitian ini adalah quasi experiment dengan pre and post test without control. Pengambilan sampel menggunakan  total sampling sejumlah 44 siswa namun sampai akhir penelitian jumlah sampel adalah 39 responden dikarenakan 5 responden masuk ke kriteria drop out. Kesiapan penanganan pertama syncope sebelum diberikan intervensi mayoritas dalam kategori tidak siap dengan 26 responden (66,7%) dan sisanya dalam ketegori siap dengan 13 responden (33,3%). Setelah diberikan intervensi, kesiapan penanganan pertama syncope dalam kategori siap dengan 39 responden (100%). Uji analisa menggunakan wilcoxon test. Hasil analisis uji wilcoxon test menunjukan p = 0,000 (p < 0,05) yang artinya ada pengaruh edukasi syncope dengan metode jigsaw terhadap tingkat kesiapan penanganan pertama syncope pada siswa jurusan asisten keperawatan.