bluuebunny/crossref_metadata_2025 huggingface dataset:
The solvability conditions for the second order nonlinear differential equation with unbounded coefficients in L2(R)
Authors:   L.N.Gumilyov Eurasian National University, Yesbayev A.N. , Ospanov M.N. ,   L.N.Gumilyov Eurasian National University
Published: April 2021

The article deals with the existence of a generalized solution for the second order nonlinear differential equation in an unbounded domain. Intermediate and lower coefficients of the equation depends on the required function and considered smooth. The novelty of the work is that we prove the solvability of a nonlinear singular equation with the leading coefficient not separated from zero. In contrast to the works considered earlier, the leading coefficient of the equation can tend to zero, while the intermediate coefficient tends to infinity and does not depend on the growth of the lower coefficient. The result obtained formulated in terms of the coefficients of the equation themselves; there are no conditions on any derivatives of these coefficients.
An algebra of the central types of the mutually model-consistent fragments
Authors:   Buketov Karaganda University, Yeshkeyev A.R. , Mussina N.M. ,   Buketov Karaganda University
Published: April 2021

In this paper, the model-theoretical properties of the algebra of central types of mutually model-consistent fragments are considered. Also, the connections between the center and the Jonsson theory in the permissible signature enrichment are shown, and within the framework of such enrichment, instead of some complete theory under consideration, we can obtain some complete 1-type, and we will call this type the central type, while the theories under consideration will be hereditary. Our work is divided into 3 sections: 1) the outer and inner worlds of the existentially closed model of the Jonsson theory (and the feature between these worlds is considered for two existentially closed models of this theory); 2) the λ-comparison of two existentially closed models (the Schroeder-Bernstein problem is adapted to the study of Jonsson theories in the form of a JSB-problem); 3) an algebra of central types (we carry over the results of Section 2 for the algebra (F r(C), ×), where C is the semantic model of the theory T). Also in this article, the following new concepts have been introduced: the outer and inner worlds of one existentially closed model of the same theory (as well as the world of this model), a totally model-consistent Jonsson theory. The main result of our work shows that the properties of the algebra of Jonsson theories for the product of theories are used as an application to the central types of fixed enrichment. And it is easy to see from the definitions of the product of theories and hybrids that these concepts coincide if the product of two Jonsson theories gives a Jonsson theory.
On Boundary Value Problems for a Mixed Type Fractional Differential Equation with Caputo Operator
Authors:   National University of Uzbekistan, Yuldashev T.K. , Islomov B.I. ,   National University of Uzbekistan, Ubaydullaev U.Sh. ,   National University of Uzbekistan
Published: April 2021

This article is devoted to study the boundary value problems of the first and second kind with respect to the spatial variable for a mixed inhomogeneous differential equation of parabolic-hyperbolic type with a fractional Caputo operator in a rectangular domain. In the study of such boundary value problems, we abandoned the boundary value condition with respect to the first argument and instead it is used additional gluing condition. In this case, in the justification of the unique solvability of the problems, the conditions on the boundary domain are removed. This allowed us to weaken the criterion for the unique solvability of boundary value problems under consideration. The solution is constructed in the form of Fourier series with eigenfunctions corresponding to homogeneous spectral problems. Estimates for the convergence of Fourier series are obtained as a regular solution of this mixed equation.
Approximate Solution of Volterra Integro-Fractional Differential Equations Using Quadratic Spline Function
Authors:   University of Sulaimani, Jwamer K.H.F. , Ahmed Sh.Sh. ,   University of Sulaimani, Abdullah D.Kh. ,   University of Sulaimani
Published: April 2021

In this paper, we suggest two new methods for approximating the solution to the Volterra integro-fractional differential equation (VIFDEs), based on the normal quadratic spline function and the second method used the Richardson Extrapolation technique the usage of discrete collocation points. The fractional derivatives are regarded in the Caputo perception. A new theorem for the Richardson Extrapolation points for using the finite difference approximation of Caputo derivative is introduced with their proof. New techniques using the first derivative at the initial point such that obtained by follow two cases the first using trapezoidal rule and the second using the first step of linear spline function using the Richardson Extrapolation method. Specifically, the program is given in examples analysis in Matlab (R2018b). Numerical examples are available to illuminate the productivity and trustworthiness of the methods, as well as, follow the Clenshaw Curtis rule for calculating the required integrals for those equations.
Perception of trauma and symptoms of PTSD in adolescents in wartime and non-war conditions: An exploratory cross-cultural study
Authors: Baráth Árpád
Published: April 2021

Major findings of a trauma survey with two samples of adolescents (age 11-17) are presented. One was a sample of school children from Croatia screened for PTSD at the time of warfare in former Yugoslavia (N = 172). The control was a sample of peers from Hungary (N = 282), with no personal experience of any warfare in lifetime. Croatian and Hungarian versions of a self-administered screening instrument was used to measure perceptions of trauma and twelve symptoms of PTSD. The findings call attention to the fact that despite remarkable difference between the two groups in free listing of adverse life events, the levels of distress as measured with a series of PTSD symptom scales were found not that dramatic as one would expect. The following symptom scales were found with high average self-rating in both groups: Nearly equally high mean scores were estimated for both groups in the following symptom scales: 1, Anger, 2. Revenge, 3. Meaninglessness, 4. Fear,5. Powerlessness, in this order. The largest between groups difference was found in the “Hate” subscale on the behalf of the warfare sample (t = 8.46 df = 426 p < .0001). Alternative interpretations of the results are discussed.
Intradural Dorsolumbar Disc Herniation: Case Report and Literature Review
Authors: Paz Norbery
Published: April 2021

Intradural disc herniation is a rare entity, representing between 0.26% and 0.30% of all herniated discs. 92% of cases occur in the lumbar spine, more frequent at the L4-L5 level. The diagnostic and therapeutic conduct performed in a 61-year-old male patient who came to the office with a one-year and six-month history of dorsolumbar pain is described, accompanied by sensory alterations in the lower limbs. In view of the exacerbation of symptoms, a simple magnetic resonance study was performed, observing an intraspinal, intradural, extramedullary lesion at the D12-L1 space. An intradural disc herniation is suspected.After being evaluated the case in the group of Neurosurgeons (Group of Spinal Surgery) of the Institute of Neurology and Neurosurgery of Havana, it is proposed to carry out surgical treatment, which consisted of the extraction with microsurgical technique of the Herniated disc, preserving the vertebral anatomy through the laminoplasty technique, an open book variant. The patient evolved satisfactorily after three months of follow-up. It is concluded that intradural disc herniation should be included among intradural, extraxial lesions of the spine. By means of the magnetic resonance study, a group of imaging signs that support the preoperative diagnosis of this lesion can be described. Surgery is the definitive therapeutic method and allows an accurate diagnosis of spinal herniation to be established.
Surgery Combined With Embolization in the Treatment of Plexiform Neurofibroma: A Case Report and Literature Review
Authors: Filho Reinaldo
Published: April 2021

Neurofibromatosis type 1 (NF1) is an autosomal dominant multisystem genodermatosis resulting from a mutation on chromosome 17q11.2, characterized by diverse clinical expression with involvement of the skin, nervous system, bones, eyes and other systems. Neurofibromas are tumors located along nerve bundles; when they become large, they are called plexiform neurofibromas. Complications of neurofibromas are rare, but include malignant transformation and potentially life-threatening hemorrhages. A comprehensive perioperative management, including arterial embolization of feeding vessels, is required in order to perform a safe surgical procedure and to reduce potential surgical complications. We report a case of a large plexiform neurofibroma on the right flank, treated in a two-stage approach: first, embolization with polyvinyl alcohol particles of the inferior epigastric, lumbar and superior gluteal arteries on the right and, second, 24 hours after embolization, exeresis of the lesion, which weighed 2.5 kg. Two years after surgery, the patient was asymptomatic, without tumor recurrence and with an important improvement in self-esteem and quality of life
Effect of Neuromuscular Electrical Stimulation (NMES) on swallowing in Persons with Parkinson’s disease exhibiting Dysphagia: A Systematic Review
Authors: Belliappa M Sonam
Published: April 2021

Swallowing is an essential activity required for survival. The global definition of dysphagia is simply difficulty in swallowing. Around 80% of individuals with Parkinson’s disease (PD) are diagnosed with dysphagia in any stage of their disease progression. Dysphagia therapy in these individuals has gained considerable importance in improving the quality of life in the recent past. With the advancement of technology related to dysphagia management, the use of Neuromuscular Electrical Stimulation (NMES) in dysphagia management is studied extensively, and the efficacy of it in successfully easing dysphagia symptoms in PD is still being evaluated. Hence this systematic review is aimed to give an overview regarding the current status of the literature available on the effect of NMES as a method of dysphagia rehabilitation on swallowing function in persons with PD. The present review will collate and critically analyse the existing knowledge of neuromuscular electrical stimulation in dysphagia management of persons with Parkinson’s disease. The authors did a systematic literature search following the PRISMA guidelines using electronic databases for studies reporting the use or effect of NMES on swallow function, aiding management of dysphagia in persons with PD. The quality and the levels of evidence of articles included were in accordance with the ABC rating scale by Siwek et al [20]. 3 out of 38 publications identified met the inclusion criteria. The authors carried out a systematic, qualitative and critical analysis of the articles finalised. The summary of the reviewed articles revealed the dearth of evidence and several methodological flaws as well as highlighted the prevailing research gap in this arena. This review additionally aids Speech-Language and Swallow Pathologists in clinical decision making and future directions concerning selecting Neuromuscular Electrical Stimulation (NMES) as a treatment option for managing dysphagia in persons with PD.
Giant Joints in Association with Chronic Renal Failure
Authors: Erok Berrin
Published: April 2021

Tumoral Calcinosis (TC) is an uncommon benign entitiy characterized by solitary or multiple tumorlike densely calcified periarticular masses located typically in the extensor surfaces of the large joints. TC can be primary or secondary. The primary TC is a rare hereditary familial disorder of phosphate regulation. On the other hand, secondary TC is associated with an underlying disease, most frequently, chronic renal faliure (CRF). Herein, we present a case of 40 year old male patient with CRF and 10 years history of hemodialysis, presenting with swellings around the right hip and left shoulder joints. The diagnosis of secondary TC has been made with typical computed tomography (CT) and magnetic resonance imaging (MRI) findings. Secondary TC is an uncommon condition particularly occuring in association with CRF. Typical radiologic findings and clinical history are leading in the diagnosis and prevent unnecessary further evaluations.
True Umbilical Cord Knot in a Primigravida
Authors: Bhargava Raghav
Published: April 2021

Umbilical cord knots occur in 1-2% of all deliveries can lead to increase in fetal death and asphyxia. A thorough cord examination is important to discern abnormalities. Although there are not set guidelines for diagnosing and managing umbilical cord knots; increase of reporting with complications will aid in decision making for better future patient management. We describe one such case in a primigravida who was found to have an umbilical cord knot.
Research of authentication failure and ARP inject attacks and methods of their detection in IEEE 802.11 networks
Authors: Kovtsur M. , Kistruga A. , Voroshnin G. , Fedorova A.
Published: April 2021

Nowadays, Wi-Fi technology is used everywhere in the world: in the offices of large companies, public places and in simple home premises. However, the use of a public transmission medium leads to the possibility of various attacks. This article discusses attacks such as authentication failure and Address Resolution Protocol inject. The considered attacks have shown high efficiency and danger for wireless networks. In this connection, methods of detection and protection against them were proposed. Methods. At the first stage, the concept of how attacks work, their main idea and purpose, were analyzed. At the subsequent stages, for testing, a laboratory stand was created, on which they were simulated. In the course of the experiments, the effectiveness of attacks was found out, and the main phases of attacks and the elements that contribute to their detection were graphically reflected in the article. Main results. As a result of the work done, it was possible to isolate attack vectors and identify their accompanying anomalies. Based on the research materials, mechanisms for detecting and preventing the attacks under consideration were developed. The practical part. All theoretical and experimental materials collected in the article can be used in detecting and preventing attacks on wireless networks by network administra-tors and information security specialists.
ORAL HEALTH STATUS IN A COHORT OF 114 CANCER PATIENTS IN ADJUVANT THERAPY TREATED BY DENOSUMAB
Authors: Leone Silvia
Published: April 2021

All patients (n=114) sents from Outpatient Clinic of Physical and Rehabilitative Medicine, “Maggiore della Carità” Hospital, Novara, Italy  the  underwent a dental examination, in anticipation of taking Denosumab. Patients undergoing a dental check-up were on adjuvant therapy with hormone therapy drugs due to previous breast and prostate cancer. Good oral health is a prerequisite for starting denosumab treatment.
ANALYSIS OF PROFITABILITY PERFORMANCE: THE COMPARISON OF BPR KOTA BARU AND BPR IN SOUTH KALIMANTAN PROVINCE DURING COVID-19 PANDEMIC PERIOD
Authors: Supeno Wangsit
Published: April 2021

The impact of the Covid-19 pandemic is strongly felt for the Rural Banks (or BPR) industry operating in South Kalimantan province. This study is a case study of BPR Kota Baru operating in South Kalimantan Province. Based on the financial report published by Financial Services Authority (or OJK), the BPR Kota Baru is one of the banks that has the best Return On Asset (ROA) performance, because the ROA ratio continues to grow during the Covid-19 pandemic. The purpose of this study is to find out the extent of the performance of Return On Asset or ROA of BPR Kota Baru compared to the ROA Performance of some BPR in South Kalimantan Province before and during the Covid-19 pandemic has a positive ROA. Analysis of research data is sourced from the financial statements of conventional BPR publications accessed on the website of OJK. This study conducts comparative research methods and finds that during the Covid-19 pandemic the ROA of BPR Kota Baru for September 2020 is 6.74% while the average ROA ratio of other BPR is 4.80%. On asset management and operational cost efficiency to operating income (BOPO), the management of BPR Kota Baru manage to improve profitability capability in the midst of the Covid-19 pandemic in the position of financial statements published in September 2020.
Teacher Professional Development
Authors: Zulfitri Zulfitri
Published: April 2021

Professionalism of teachers is often attributed to three factors are quite important, namely the competence of teachers, teacher certification and teacher professional allowance. The third factor is the background that was allegedly closely associated with the quality of education. Professional teachers as evidenced by its competence shall promote the establishment process and product performance which can support the quality of education. Competent teachers can be evidenced by the acquisition of teacher certification following an adequate allowance according to the size of Indonesia. Today, there are a number of teachers who have been certified, it will be certified, has gained professional allowance, and will acquire the professional allowance. The fact that the teachers have been certified is a strong assumption, that the teacher already has competence. The problem that arises then, that the teacher is assumed to have had the competence which is only based on the assumption that they have been certified; it seems in the long term it is difficult to be accountable academically. Evidence have been certified, the teacher is present condition, which is generally a quality teacher resources shortly after certification. Therefore, the certification is closely related to the learning process, the certification cannot be assumed to reflect the competence of a superior lifetime. Post- certification should be an early milestone for teachers to constantly improve competence by means of long-life learning. To facilitate the improvement of teacher competence, it is necessary that a competence is initiated in order to manage the development of teachers’ professionalism.
PENGARUH TEKNOLOGI BLOCKCHAIN TERHADAP KEABSAHAN IJAZAH
Authors: Rahardja Untung , Mulyati Mulyati , Budiarty Frizca
Published: April 2021

Ijazah merupakan tanda bukti atau suatu dokumen pengakuan atas selesainya jenjang pendidikan yang telah ditempuh seorang pelajar. Keberadaan Ijazah tentu sangat bernilai penting karena digunakan sebagai alat dalam melakukan berbagai kegiatan diantaranya sebagai dokumen dalam melamar kerja. Pada studi lapangan banyak ditemukan suatu pelanggaran hukum yakni, kasus pemalsuan ijazah untuk tujuan mendapatkan pekerjaan yang layak. Kendati ijazah sangat mudah dipalsukan, hal ini menyebabkan sulitnya memastikan keabsahan dari dokumen tersebut. Hadirnya teknologi blockchain di era 4.0 ini diharapkan mampu dimanfaatkan dalam dunia pendidikan dengan menerapkan keunggulan yang dimiliki oleh blockchain yaitu sistem terdesentralisasi dan kriptografi, maka keberadaan teknologi blockchain akan mampu mengeliminasi keberadaan ijazah palsu dan mampu membuktikan keabsahan ijazah bagi calon pelamar kerja, secara efektif, efisien serta transparan. Penelitian ini mengadopsi 2 metode yaitu, metode analisis deskriptif dan metode studi pustaka. Blockchain diharapkan mampu ikut menyumbang keberhasilan dan meningkatkan

kualitas pendidikan nasional.
ORGANIZATIONAL COMMITMENT LEVELS OF PRESCHOOL TEACHERS AND ADMINISTRATORS' LEADERSHIP STYLES
Authors: Kırkıç Kamil Arif , Balcı Türkan Demir
Published: April 2021

The organizational commitment levels of preschool teachers are crucial to have an effective early childhood education. One of the most influential factors affecting organizational commitment is administrators' leadership style. This research explored the correlation between administrators' leadership styles and organizational commitment levels of preschool teachers. The correlational survey design was used as one of the quantitative research models in this study. Participants in the study were preschool teachers in Istanbul's Küçükçekmece district. The research was conducted during the 2017-2018 academic year. There are 237 teachers in the study sample. The 5-point Likert type Organizational Commitment Scale with 27 items and the Leadership Style Scale with 35 items were used to collect data. It was found that teachers generally identified with their organizations and internalized the organization’s values, while school administrators were perceived as using a transformational leadership style. The study found a statistically significant correlation between the leadership styles of administrators and the levels of organizational commitment of preschool teachers. In preschool institutions, teachers' institutional commitment is essential for the development of students. Therefore, administrators should be sensitive to their leadership styles to make the commitment levels of preschool teachers high. The research has limitations like being a local one, done in a relatively short time, and the participants were only teachers working in public schools. Keywords: leadership style, organizational commitment, preschool teacher, correlational survey, educational leadership
THE EFFECT OF EXPERIENCE ON REDUCING THE OVERCONFIDENCE EFFECT IN TEACHERS
Authors: Krause Robert
Published: April 2021

Being overconfident in one’s abilities is connected to poor self-judgment and it is essential to find ways how to reduce this phenomenon. The aim of the study was to research whether the act of taking a reading literacy test can be an effective means of reducing the overconfidence effect in the sample of Slovak teachers. Using purposive sampling method, a sample of 225 teachers from across school levels was obtained. The levels of overestimation (OE) and overplacement (OPE) effects were compared before and after having undergone the reading literacy test. The results showed that even just taking the test can reduce OE and to a lesser degree also OPE in all participants regardless of the feedback, which was in contrast to the original belief that just the experience itself does not affect overconfidence. Greater reduction in OE was observed in less competent participants, whereas none was observed among the more competent. These results showed that experience is also a form of debiasing.
Keywords: overconfidence effect, overestimation effect, effect of experience, debiasing overconfidence
STUDENTS’ PERCEPTIONS ON DISTANCE EDUCATION: A CASE STUDY IN MOZAMBIQUE
Authors: Manuel Alzira , Buque Domingos , Quive Rosário
Published: April 2021

Education in all societies is one of the requisites for changes and development, particularly in the current context influenced by globalization and rapid changes in which knowledge and technology became essential tools for life. In this context, Mozambique has been and continues promoting education, including Classroom Teaching Adult Education and Distance Adult Education (DAE) to satisfy people’s learning needs and improve their capacities towards changes. DAE is considered a way to open opportunities of education for youth and adults who by different reasons cannot participate in classroom teaching. This study seeks to explore the perceptions of youth and adult students in DAE at Eduardo Mondlane University (EMU), about their learning process. The study applied qualitative approach, based on semi-structured interview administrated to twelve students from the 3rd and 4th years of the undergraduate program in Organization and Management of Education in Distance Education (DE) modality. The findings of this study point out that DAE is perceived as a relevant and useful modality of education, particularly for adult learners. However, the study identifies contextual challenges associated to individual and professional issues, pedagogical and organizational issues as well as gender division of labor within the families, impacting the student’s performance in DE in the selected higher education institution. Keywords: adult education, distance education, lifelong learning, qualitative research
STUDENT PERCEPTIONS OF ECUADORIAN VIRTUAL PLATFORMS DURING THE COVID-19 PANDEMIC
Authors: Cejas Martínez Magda Francisca , Navarro Cejas Mercedes , Venegas Alvarez Gina Silvana , Proaño Rodríguez Carlos Enrique , Mendoza Velazco Derling Jose
Published: April 2021

In February 2020 Ecuador declared a health emergency due to the Covid-19 pandemic. On-site classes were suspended. The Ecuadorian university population does not adapt to virtual educational platforms. The objective of the study was to analyse student perception of Ecuadorian educational platforms in higher education during the COVID-19 pandemic. The study was quantitative. The sample was non-probabilistic participatory, consisting of students from different universities in the Province of Chimborazo. For data collection, a questionnaire with four study variables was applied. The results were analysed with T student and MANOVA. There is a positive perception of students using the educational platforms. There were significant statistical differences according to gender variables, contrary to the levels of study and location, there is a greater sympathetic affection of students when receiving virtual classes by female teachers. It can be concluded that the Covid-19 pandemic accelerated the adoption of online learning by higher education institutions.
Keywords: Covid-19, virtual education, higher education, Ecuador, education platform, virtual education, Ecuador
POSTGRADUATE SUPERVISION PRACTICES IN EDUCATION RESEARCH AND THE CREATION OF OPPORTUNITIES FOR KNOWLEDGE SHARING
Authors: Ngulube Patrick
Published: April 2021

Supervisory practices are fundamental to the production of research in higher education, but these practices are undertheorized and poorly understood. Academia needs to understand and engage with supervisory pedagogies to reinforce their importance in knowledge production and the development of a knowledge society. Using content analysis of master’s and doctoral research outputs completed between 2010 and 2016, this case study investigated postgraduate supervision practices in education in South Africa, and their implication for knowledge sharing in context. The findings showed that supervision in education has remained rooted in the classic individualistic model, with team supervision not prevalent. The benefits of team supervision relative to the individualistic model are highlighted. Acknowledgement of the range of competencies of supervisors and the growth of interdisciplinary and multidisciplinary research signals the value of the team supervision model. In addition to improving research support, team supervision also creates communicative spaces and opportunities for knowledge sharing and the development of supervisors. Keywords: communicative spaces, higher degrees research, knowledge sharing, postgraduate education, postgraduate research supervision, research supervision styles, supervision models
REVIEW OF THE STATE OF METHODOLOGICAL TRENDS IN OPEN AND DISTANCE LEARNING LITERATURE 2009-2018
Authors: Ukwoma Scholastica Chizoma , Ngulube Patrick
Published: April 2021

Methodological trends are a key to the development of research in open and distance learning as a cognitive field. The purpose of this study was to review the methodological trends in the open and distance learning scholarly communication literature. It is important that research strategies are reviewed often to ensure the production of quality research output in a cognitive discipline. The study adopted qualitative content analysis to a sample of 1,393 articles published in five open and distance learning (ODL) journals from 2009 to 2018. The main findings of the study indicated that qualitative and quantitative methodologies were used more often than mixed methods research methodology, which was underrepresented. This implies that research in ODL relied heavily on positivist and interpretivist epistemologies, rather than pragmatist ones. Survey research approaches dominated in the research articles published in the ODL journals during the period under study. The main data analysis techniques were statistical and narrative techniques. Having ascertained that there is a gap in the use of mixed methods research in ODL, there is a need to set the future direction for open and distance learning research to focus on mixed methods research to minimise the weakness inherent in using only one method.
Keywords: data analysis technique, methodological trends, open distance learning, research paradigm
THE FLIPPED CLASSROOM: MEDIA HYPE OR EMPIRICALLY BASED EFFECTIVENESS?
Authors: Weiß Lars-Frederik , Friege Gunnar
Published: April 2021

Few teaching concepts have received as much attention in recent years as the Flipped Classroom (FC). This is clearly linked to media attention on the concept, which is currently being intensified by the Corona pandemic. In this research, the media rise of the concept is explained and the discrepancy between popularity and empirically validated research results is clarified. While the literature basis for the FC has grown enormously over the last decade, reviews and initial meta-analyses have shown, through their filter criteria, that not many of studies can meet scientific standards. The comparison of individual studies is particularly difficult, because there is no uniformly accepted framework and no uniform definition of the concept. For this reason, one of the goals of this research was to give an overview of the variety of FC definitions, discuss its most controversial characteristics, and to provide the key elements for a definition of the FC. A comparison of selected studies and reviews shows an assessment of the effectiveness of the teaching concept. The findings shed light on potential problems and challenges, and provide directions for future research.
Keywords: active learning, digitalization of education, e-learning, flipped classroom
Commentary about open-label randomized controlled study of ivermectin in mild to moderate COVID-19
Authors: Meneses Giovanni
Published: April 2021

Abstract not available

Ibrahim Med. Coll. J. 2020; 14(2): 67-68
Resistencia a Erosión Húmeda en Bloques de Tierra Comprimida. Evaluación de Diferentes Métodos para el Análisis de Resultados
Authors: Cabrera Santiago , González Ariel
Published: April 2021

En esta investigación se analizan los diferentes métodos de ensayo propuestos por la normativa internacional para evaluar la resistencia al intemperismo físico y, particularmente, a la erosión húmeda de los bloques de tierra comprimida (BTC), examinando las superficies erosionadas. Además, se proponen 2 alternativas diferentes a la propuesta por las normas para evaluar los resultados de estos ensayos: pérdida de masa y cotejo directo con patrones gráficos de comparación; analizando finalmente la viabilidad de cada método. Finalmente, se observó que el método de comparación directa con patrones sólo es efectivo para evaluar la resistencia a la erosión húmeda de las probetas sometidas al ensayo de pulverizado de agua a presión, mientras que el método de la determinación de la pérdida de masa no es adecuado para evaluar los resultados de este tipo ensayos.
Adaptación ¿permanente? al cambio: Percepciones sobre la modalidad virtual de aprendizaje en la educación superior
Authors: Coria María Marta
Published: April 2021

El trabajo examina las valoraciones de estudiantes y docentes sobre la modalidad virtual de enseñanza-aprendizaje, las principales ventajas e inconvenientes percibidos, las preferencias sobre los formatos de clases y las herramientas didácticas que resultan más atractivas para aprender. Los resultados muestran que, tanto docentes como estudiantes, se adaptaron a la modalidad virtual a pesar de que la mayoría no tenía experiencias previas en esta modalidad de enseñanza-aprendizaje. Las principales ventajas percibidas respecto de la modalidad virtual son la flexibilidad del cursado mientras que las desventajas son los problemas de conectividad. Las prácticas docentes, en su mayoría, se adaptaron a la modalidad virtual, mejorando el desempeño de los estudiantes.
Clasificadores de Aprendizaje Automático aplicados a Datos RKI MALDI-TOF de Espectrometría de Masa de Bacterias
Authors: Rey Andrea Alejandra
Published: April 2021

En este trabajo evaluamos el rendimiento de diferentes métodos de aprendizaje automático, para la clasificación de bacterias a partir de espectros de masas disponibles en la base de datos RKI MALDI-TOF. La identificación de microorganismos empleando espectrometría de masas se ha convertido en una tecnología muy popular en los últimos años, especialmente en microbiología clínica, donde una clasificación adecuada es fundamental al momento de elegir un tratamiento correcto. Los modelos elegidos en nuestro estudio incluyen análisis por discriminantes, árboles de decisión, vecinos más cercanos y redes neuronales. Consideramos las siguientes medidas para el análisis: exactitud, coeficiente κ de Cohen,  tasa de no información y tiempo consumido. Los resultados obtenidos nos permiten recomendar el análisis por discriminante lineal, con un desempeño levemente inferior a vecinos más cercanos, pero aventajándolo en términos de costo computacional.
Flujos Hidrodinámicos y Magnetohidrodinámicos. Parte 1
Authors: Rotstein Néstor Osvaldo
Published: April 2021

En este artículo desarrollamos un modelo hidrodinámico de un flujo de plasma no magnetizado, acelerado bajo la acción de sólo dos fuerzas, una debida al gradiente de  presión y la otra la gravitatoria.  Fijamos fenomenológicamente la topología del flujo a partir de un criterio de plausibilidad  con base observacional. La discusión de la termodinámica  asociada al flujo muestra que en el caso de estrellas cuyo viento no es generado por la presión de radiación y carecen de una corona, los valores que se obtienen de temperatura son mayores a los medidos, y que sólo bajo condiciones extremadamente particulares podría desarrollarse un viento compatible con las observaciones.
Estresse ocupacional em profissionais das equipes de saúde bucal na estratégia de saúde da família
Authors: Carneiro Caroline Dantas Albuquerque , Peixoto Sylvia Sampaio , Albuquerque Luciana Camêlo de
Published: April 2021

Objetivo: O estudo teve por objetivo analisar as condições de estresse ocupacional em que estão submetidos os profissionais de Equipes de Saúde Bucal do Distrito Sanitário II do Recife. Métodos: Estudo descritivo transversal realizado com 66 profissionais da odontologia da Estratégia de Saúde da Família, analisando as situações de esforço e recompensa no trabalho a partir do questionário Effort-Reward Imbalance. Resultados: Segundo o cálculo da razão de desequilíbrio esforço-recompensa, 90,3% da amostra se encontram em situação de equilíbrio entre esforço despendido no trabalho e recompensa recebida. Porém, 45,5% encontra-se com alto esforço no trabalho, 53% com baixa recompensa e 47% com alto comprometimento excessivo, o que revela uma população que vivencia situações de estresse ocupacional e que está propensa a desordens ao bem-estar no trabalho e na saúde dos profissionais. Conclusão: A adoção de práticas que primem pela igualdade de tratamento e valorização dos profissionais deve ser priorizada, além da legitimação de medidas de vigilância e assistência à saúde dos trabalhadores do município.
Implications of Covid-19 Pandemic on Household Food Security: Experience from Sarawak, Malaysia
Authors: Regina Garai Abdullah  , Neilson Ilan Mersat  , Swee-Kiong Wong
Published: April 2021

This paper discusses how household food security is affected by the Covid-19 pandemic, using examples from Sarawak, Malaysia. Food security in Sarawak was affected by the implementation of the Movement Control Order (MCO) that was introduced to curb the spread of the Covid-19 disease. The MCO, and the subsequent phases that followed, imposed a varying degree of restrictions on movements in the country. This measure had serious repercussions on food security as it affects the distribution of food as well as how people access food. This raises questions of how secure households are in terms of food security, how do they ensure food security for their households and what are their greatest challenge in ensuring food security. This paper seeks to address those questions by examining the experiences and perceptions on food security during the pandemic based on the responses of 235 respondents. Findings indicated that most households are food secure i.e. having similar access to food as prior to MCO and have not skipped any meals. In order to achieve this, households had to resort to various measures including switching their food sources, shopping online, and going without their preferred food. Significantly, the finding shows that food security means more than just having enough food but should also incorporate elements of variety, types and quantity of food. It also shows that the greatest challenge in achieving and maintaining household food security lies in the way household cope with the changes brought, both directly and indirectly, by the pandemic.
The Determinants of Waqf Sustainability in Malaysia: A PLS-SEM Analysis
Authors: Noraina Mazuin Sapuan  , Nur Azni Mohd Zeni
Published: April 2021

Over the years, Waqf institutions has played an important role in addressing range of socio-economic development of ummah in the world. Waqf has been growing with time and there are increasing expectation surroundings the role of Waqf institutions. Nevertheless, lately the performance of Waqf institutions in Malaysia have cope with issues of inefficiency. According to the literature, inefficiency of Waqf performance is associated with internal factor which is Waqf management. Due to the matter, researchers agreed that Waqf institutions is in need of a holistic Waqf management reform to solve the arise issues. Following the issue, this study investigates the effect of efficient Waqf management determinants on the sustainability of Waqf institutions for long term growth in Malaysia. This study used a quantitative research methodology and a selected sample of 99 respondents in Waqf institutions were analyzed. The results were examined using partial least squares-structured equation modelling (PLS-SEM). This study empirically reveals that the determinants of efficient Waqf management positively influence the sustainability of Waqf institutions for long term growth. The result of this study will enhance the understanding of existing conceptual literature on the important of comprehensive Waqf management determinants in influencing the sustainability of Waqf institutions in Malaysia.
The Role of National Food Security in a Massive Pandemic: The Case of Covid-19
Authors: Mario Arturo Ruiz Estrada
Published: April 2021

This paper proposes the national pandemics contingency plan for any country based on the application of the minimum food, water & medication storage for a massive pandemic quota (ψ-Quota). Consequently, the main objective of the ψ-Quota is to calculate the approximate amount of food, water, and medicines storage amount annually in case of a possible massive pandemic crisis. Finally, this paper is divided into three sections: (i) the minimum food, water, and medicine quota storage calculation in case of a massive pandemic; (ii) the food, water, and medicine storage quota for a massive pandemic; (iii) the geographical distribution and mapping of the emergency aid supplier’s modules in case of a massive pandemic for any country. Finally, the ψ-Quota was applied on the case of Malaysia.
Beyond The Call of Duty: Realities of Work-Life Balance in the United Arab Emirates Education Sector
Authors: Olatunji David Adekoya  , Hakeem Adeniyi Ajonbadi  , Gideon Iheukwumere Okorie  , Ibrahim Olaitan Jimoh
Published: April 2021

Previous research have been intrigued to assess the mechanisms used by employees to cope with tedious work schedules and other areas of their non-work lives. While there are yet to be sufficient studies that explore the countries in the Middle East, this paper aimed to explore the realities of WLB among professionals in the education sector in the United Arab Emirates (UAE). We further considered the implications of workplace and family support, and organisational culture on employees’ WLB and productivity. The study employs the use of qualitative data generated from semi-structured interviews of 41 lecturers across seven higher education institutions in Dubai, UAE aimed at investigating the various contexts of WLB.
Research on the Influencing Factors of Chinese Family Business's Succession from the Perspective of Re-Creation
Authors: Li Qi  , Ratih Hurriyati  , H Disman  , Mohammad Ali
Published: April 2021

Under the background of great changes in China's economic environment, a large number of small and medium-sized family businesses are in urgent need of transformation and upgrading that entering the channel of re-creation. For the family business, the successor signifies the future development direction and growth trend of the business. The inter-generational succession of the family business is a multistage evolution process influenced by many factors. In the specific succession practice of family businesses, the influence of the succession of family businesses is analyzed from the perspective of re-creation in combination with the actual situation. Based on the theory analysis on influencing factors of family business’s succession and the way of the questionnaire and factor analysis measure, the research had found and explained the major influencing factors of Chinese family business's succession, namely, relationship, successor, creator, re-creation, organization, environment. It provided a reference on the inter-generational succession of Chinese family businesses from the perspective of re-creation.
Getting the Message Across: Examining Malaysia’s Covid-19 Public Service Announcement (PSA) Infographics
Authors: Collin Jerome  , Su-Hie Ting  , Yuwana Podin
Published: April 2021

The current COVID-19 pandemic has become an unprecedented public health crisis and there is much ongoing research investigating its wide-ranging impacts on all areas of society and people's everyday lives. This article presents preliminary findings of an ongoing study that inquires into Malaysia's COVID-19 public service announcement (PSA) infographics and how they convey much-needed information to the general public during the pandemic period. Drawing upon research on infographics in healthcare and health risk communication, the article examines COVID-19 PSA infographics that have been produced in Malaysia and the ways they achieve what they are designed to do. The findings show that the infographics 1) are numerous and mostly presented in the informational and process-based types, 2) cover various topics related to the information on the novel virus, its risks, and recommended preventive and control measures, 3) possess key components of infographic and (4) adopt a three-way process of engaging the target audience. The findings also reveal several key points worth considering in thinking about the infographics, including whether they communicate the right message to the right audience at the right time and whether they are designed according to the principles of message design in health risk communication.
Dividend Policy and Share Price Volatility: Evidence from Listed Non-Financial Firms in Sri Lanka
Authors: Lingesiya Kengatharan  , Jeyan Suganya Dimon Ford
Published: April 2021

The prime objective of this research is to investigate the impact of dividend policy on share price volatility in Colombo Stock Exchange (CSE). A sample of 81 listed non -financial firms from CSE in Sri Lanka is examined using panel data analysis for a five years period from 2013 to 2017. Dividend policy of the firms has been measured by dividend pay-out, dividend yield and dividend per share and which are explanatory variables of the study after controlling for firm size and financial leverage. According to the random effect regression analysis, only 25% of the movements in share prices are explained by the explanatory variables considered in this study. Dividend yield shows significant positive impact on share price volatility whereas dividend per share shows the significant negative impact on share price movements. Firm size illustrates significant negative influence on share price volatility by indicating large size of companies share price volatility is high. But, dividend pay-out and financial leverage are not significantly persuaded on share price volatility in this study. Therefore, it is concluded that dividend yield, dividend per share and firm size have significant impact on price volatility in Sri Lankan context and findings of the study are in line with the dividend relevance theory. Dividend policy can be considered as the protective mechanism to maintain share price volatility in order to enhance the shareholders wealth.
Bank Liquidity and Lending Behavior: Evidence from the Vietnamese Banking System
Authors: Van Dan Dang
Published: April 2021

The study investigates the impact of liquidity on lending behavior, in the form of loan growth, at Vietnamese commercial banks for the period of 2007–2017. Notably, we also explore heterogeneous effects with the support of the generalized method of moments (GMM) for the dynamic panel data models. The robust result confirmed by alternative techniques indicates that banks with more liquidity tend to expand lending more, implying the precautionary motive of liquidity storage to finance future investments. Further analysis documents that this effect seems to be stronger for state-owned banks and mitigated in the case of banks having higher capital ratios, while we find the inconclusive results for bank size. In addition to extending the existing literature, this study provides insightful implications for bank managers and policymakers in Vietnam and other emerging economies as well.
Determinants of Life Satisfaction among Female-Headed Households in Malaysia
Authors: Mohamad Fazli Sabri  , Thinagaran Moga Dass  , Nik Ahmad Sufian Burhan  , Husniyah Abdul Rahim @ Abdul Wahab  , Rusitha Wijekoon  , Megawati Simanjuntak
Published: April 2021

Female-headed households in Malaysia have been a financially vulnerable community in the society where their life satisfaction becomes a question. Therefore, this study aims to determine the factors affecting life satisfaction among female-headed households in Malaysia. A total of 527 respondents who are single, divorced, separated or widowed women, with children in the home including those on public assistance participated in this study which adapted a multi-stage sampling method using self-administered questionnaire. The results show that locus of control, religiosity, financial capability, and financial vulnerability have positive significant relationships with life satisfaction. The multiple regressions show that locus of control, religiosity, financial capability, and financial vulnerability are significant determinants of life satisfaction among female-headed household in Malaysia. More knowledge, and enhancement through financial workshops could be helpful to empower female-headed household on the use of modern financial instruments. Hence, able to increase financial capability and reduce financial vulnerability of female-headed households in Malaysia towards a better life satisfaction.