bluuebunny/crossref_metadata_2025 huggingface dataset:
Unintelligibility, personhood and curriculum silences of intersex bodies in the Life Orientation high school classroom: A case study
Authors: Brown Anthony
Published: March 2022

Despite an increase in the research that promotes affirmative gender and sexual diversity in the South African Life Orientation (LO) education, there remains an uncomfortable silence on intersex bodies. In the absence of distinctive binary classifications of external genitalia, learners with variant intersex characteristics are incapable of integration into socio-educational environments. This article explores how individuals with variant intersex characteristics learn about the self in relation to society within LO lessons. It extrapolates factors that influence the educational and psycho-social agency in and around the classroom. This phenomenological study has drawn on in-depth interviews with six individuals with variant intersex characteristics post schooling. The evidence shows that the LO curriculum privileges distinct genital developments as a marker of normal human development and means of gender identification. Previous studies found that the mutually exclusive biological sex characteristics drawn from XY (male) and XX (female) chromosomal development were major determinants of social sexual and gender embodiment in puberty lessons. Lensed through the theory of unintelligibility, bodies that deviated from this normative development were seen as ambiguous and derogatively referred to as hermaphrodites. Their personal identities were marred with constructions of freaks and abnormality. Vilifying personhood rhetoric impacted the social skills of intersex learners and their peers. Learners with intersex bodies were uncomfortable to engage with the gender binary curriculum content, facilities and school culture. Silences on intersex bodies in the LO curriculum made these learners feel invisible which led to early school dropout. This article argues for the integration of intersex knowledge that affirms, humanises and protects all gender, sexual expressions and sex characteristics in the school context. The LO curriculum is well-positioned to disrupt problematic constructions of intersex bodies as deficit and embarrassing by including variant sex characteristic developments as a norm.
Therapeutic Effects of Functional Electrical Stimulation on Physical Performance and Muscle Strength in Post-stroke Older Adults: A Review
Authors: Shin Hyung Eun , Kim Miji , Lee Daehyun , Jang Jae Young , Soh Yunsoo , Yun Dong Hwan , Kim Sunyoung , Yang Jisoo , Kim Maeng Kyu , Lee Hooman , Won Chang Won
Published: March 2022

Stroke-related disabilities cause poor physical performance, especially among older adults, and can lead to sarcopenia. Functional electrical stimulation (FES) has been used to improve physical performance in individuals with neurological disorders and increase muscle mass and strength to counteract muscle atrophy. This review covers the principles, underlying mechanisms, and therapeutic effects of FES on physical performance and skeletal muscle function in post-stroke older adults. We found that FES restored weakened dorsiflexor and hip abductor strength during the swing and stance phases of gait, respectively, to help support weight-bearing and upright posture and facilitate static and dynamic balance in this population. FES may also be effective in improving muscle mass and strength to prevent muscle atrophy. However, previous studies on this topic in post-stroke older adults are scarce, and further studies are needed to confirm this supposition.
Estrategias de gestión del mantenimiento de volquetes
Authors: Solórzano-Calero Emilio Manuel
Published: March 2022

La presente investigación plantea un modelo de gestión de mantenimiento, basada en un sistema que adopta las particularidades del proceso de mejora continua, en un tiempo de 6 meses, aplicados a los niveles operativos y administrativos. Este modelo de gestión plantea etapas, desarrollados y ejecutados de acordes a la situación actual de los volquetes Sinotruk del GADMEC (Gobierno Autónomo Descentralizado Municipal de El Carmen) a fin de optimizar los procesos de planificación, programación y ejecución del mantenimiento en todos sus niveles. La gestión de mantenimiento permitió conocer el nivel operacional y el rendimiento de la unidad en el cumplimiento del actual plan de mantenimiento. Mediante una metodología de análisis de Confiabilidad, Mantenibilidad y Disponibilidad para determinar el nivel de los indicadores de mantenimiento en la etapa de observación que permitió levantar los datos y tabularlos a fin de obtener información relevante aplicando un análisis cuantitativo de los indicadores de mantenimiento al aplicar la mencionada gestión, valiéndonos de los resultados de los tiempos promedios entre fallas, tiempos promedios para reparar y el número paradas programadas y no programadas para el mantenimiento efectivo de los equipos sujetos de estudio. Estos indicadores permitieron determinar el crecimiento de la productividad y calidad de la prestación de servicios a la comunidad con el aumento de disponibilidad como consecuencia de una mejor planeación, programación, organización y control de procesos.

Palabras clave: Mantenimiento, Volquetes, Ingeniería industrial.
Mejora de la disponibilidad de los Volquetes Sinotruk del GADMEC
Authors: Solórzano-Calero Emilio Manuel
Published: March 2022

Caracterizar los elementos que permitan la aplicación de una correcta gestión integral de mantenimiento que abarque a todos los niveles organizacionales de la empresa, exige que se establezcan ciertos parámetros a la misma, distribuyendo las actividades programación, planificación, control, monitoreo y evaluación de los procesos que a la vez permitirán mejoras al sistema. El modelo de gestión de mantenimiento para las pymes industriales presentado como producto de esta investigación, está conformado por cuatro factores, la planificación de mantenimiento; la ejecución del mantenimiento, la verificación que encierra medición, evaluación y análisis. Bajo esta premisa, la presente Revisión tiene como objetivo el estudio para el aumento de la disponibilidad operacional de los Volquetes Sinotruk del GADMEC. En ese sentido, lo expuesto en esta revisión evidencia el potencial de mejora de la disponibilidad de los Volquetes Sinotruk como aporte innovador para GADMEC.

Palabras clave: Mejora, Disponibilidad de volquetes, Gestión integral.
The strength of vulnerable positions: Financial hegemony and disruptive potential
Authors: Foureault Fabien
Published: March 2022

This article addresses the structural power of banks by analyzing the market for Leveraged Buy-Outs (LBOs) in France during the 2000s. It attempts to operationalize the concept of financial hegemony in an original way, working from the idea of point-vulnerability in a graph, introducing a method that can be used to model a network according to this criteria (cohesive blocking). The analysis shows that banks oc-cupy not only the most central, but also the most vulnerable positions in the system compared with corporations and private equity firms. The crisis of 2007-2008 has enabled banks to impose their conditions and to firmly reinstate their hegemony which was somewhat contested during the bubble period. The structure that results from such an evo-lution has ambiguous implications for systemic risk.

Cet article traite du pouvoir structurel des banques en prenant le cas du marché des opérations d’acquisition avec effet de levier (Leveraged Buy-Out ou LBO) en France dans les années 2000. Il tente d’opérationnaliser le concept d’hégémonie financière de manière origi-nale, à partir de l’idée de vulnérabilité d’un graphe en certain de ces points et il présente une méthode permettant de modéliser un réseau social suivant ce critère (cohesive blocking). L’analyse montre que les banques occupent non seulement les places centrales, mais aussi les positions les plus vulnérables dans le système d’interdépendance par rapport aux entreprises et aux fonds d’investissement participant aux opérations de LBO. La crise de 2007-2008 a permis aux banques d’imposer leurs conditions et de rétablir fermement l’hégémonie quelque peu remise en cause durant la période de bulle. La structure qui en résulte a néanmoins des implications ambiguës sur le risque sys-témique.
Polymorphism-homogeneity and universal algebraic geometry
Authors: Tóth Endre , Waldhauser Tamás
Published: March 2022

We assign a relational structure to any finite algebra in a canonical way,
using solution sets of equations, and we prove that this relational structure
is polymorphism-homogeneous if and only if the algebra itself is
polymorphism-homogeneous. We show that polymorphism-homogeneity is also
equivalent to the property that algebraic sets (i.e., solution sets of systems
of equations) are exactly those sets of tuples that are closed under the
centralizer clone of the algebra. Furthermore, we prove that the aforementioned
properties hold if and only if the algebra is injective in the category of its
finite subpowers. We also consider two additional conditions: a stronger
variant for polymorphism-homogeneity and for injectivity, and we describe
explicitly the finite semilattices, lattices, Abelian groups and monounary
algebras satisfying any one of these three conditions.
Restricted generating trees for weak orderings
Authors: Birmajer Daniel , Gil Juan B. , Kenepp David S. , Weiner Michael D.
Published: March 2022

Motivated by the study of pattern avoidance in the context of permutations
and ordered partitions, we consider the enumeration of weak-ordering chains
obtained as leaves of certain restricted rooted trees. A tree of order $n$ is
generated by inserting a new variable into each node at every step. A node
becomes a leaf either after $n$ steps or when a certain stopping condition is
met. In this paper we focus on conditions of size 2 ($x=y$, $x<y$, or $x\le y$)
and several conditions of size 3. Some of the cases considered here lead to the
study of descent statistics of certain `almost' pattern-avoiding permutations.
Evaluación del rendimiento de maíz dulce (Zea mays 'Suresweet') con las leguminosas cobertoras mucuna enana (Mucuna pruriens) y crotalaria (Crotalaria juncea Tropic Sun') en un Oxisol de Puerto Rico
Authors: Eliana Martínez-Mera  , Elide Valencia  , Hugo Cuevas
Published: March 2022

La agricultura sostenible requiere la rotación de cultivos y asociación con leguminosas para aumentar la materia orgánica y reducir el uso de fertilizantes inorgánicos. En este estudio se llevaron a cabo tres experimentos (diferentes fechas de siembra) para evaluar el efecto de dos leguminosas apisonadas (LA), mucuna enana (Mucuna pruriens) y crotalaria (Crotalaria juncea 'Tropic Sun'), versus siembra convencional (SC; arado y pases de disco) sobre el rendimiento y tamaño de mazorca verde, daño por insectos y rendimiento de semilla del maíz [Zea mays (L.) 'Suresweet 2011']. Los experimentos se llevaron a cabo en abril y julio 2013, y febrero 2014 en la Estación Experimental Agrícola de Isabela (Puerto Rico) en un suelo Oxisol. Se encontró mayor aporte de biomasa (MS) y nitrógeno (N) en julio (verano), cuando la mucuna enana produjo 1.66 Mg/ha MS y 45.54 kg/ha de N comparado con crotalaria 'Tropic Sun' con 0.96 Mg/ha MS y 26.33 kg/ha de N. Esta diferencia posiblemente está relacionada con las respuestas fotosensitivas de las LA. Análisis de contrastes entre LA vs. SC y comparaciones entre mucuna enana vs. 'Tropic Sun', no mostraron diferencias significativas para el rendimiento de mazorca fresca y semilla comerciable en la siembra de abril. Sin embargo, en la siembra de julio, la mucuna enana sobrepasó (P3.63 Mg/ha) que con LA. El daño promedio de la mazorca ocasionado por Helicoverpa zea fue de 1 a 2 cm y no presentó diferencias significativas entre las tres fechas de siembra en los tres sistemas. A pesar de las diferencias en los rendimientos con sistemas de siembra, la mucuna enana proporcionó rendimientos más uniformes en las tres siembras.
Permetrina, fluvalinato y el control del minador del cafeto en sus tres etapas
Authors: Fernando Gallardo-Covas
Published: March 2022

El minador de las hojas del cafeto, Leucoptera coffeella, es el principal insecto que ataca el café en Puerto Rico. Si no se combate a tiempo ocasiona pérdidas de hasta 40% de la producción. El insecticida foliar fluvalinato "aquaflow" (Minadox) se evaluó en años anteriores (1984 y 1985) y se obtuvieron buenos resultados. Con el propósito de obtener datos sobre el efecto del fluvalinato en las distintas etapas del ciclo de vida del minador del café (larva, ninfa y adulto) se hicieron tres ensayos en el invernadero en la subestación de Adjuntas de la Estación Experimental Agrícola. Además del fluvalinato se evaluó la permetrina (Pounce 3.2 E.C.) y ambos insecticidas se compararon con un testigo sin tratar. Se probaron tres dosis de fluvalinato: 0.21, 0.43 y 0.64 ml diluidos en 500 ml. de agua (equivalentes a 100, 200 y 300 ml./ha., respectivamente) y una dosis de permetrina: 0.94 ml. diluidos en 500 ml. de agua (equivalente a 388 ml./ha.). Ambos insecticidas pueden disminuir la propagación del minador del café. El fluvalinato demostró principalmente su propiedad de reprimir los adultos. A 0.42 ml. las galerías no aumentaron y a .64 ml. solo aumentaron 6.33%. En testigo sin insecticida y sin permetrina hubo 23.7 y 18.1% de aumento en galerías, respectivamente. Permetrina a 0.64 ml. disminuyó las larvas en 84.08% a los 7 días de la aplicación. También disminuyó en 87% de las ninfas a 0.64 ml. a los 15 días de la aplicación.
Una alternativa para limitar la población del minador del café: la aumentación de Mirax insularis
Authors: Fernando Gallardo-Covas
Published: March 2022

Un programa de control biológico del minador de la hoja del cafeto, Leucoptera coffeella Guérin-Méneville, en Puerto Rico parece ser prometedor. Dicho programa es factible porque las plantaciones de café proveen un ambiente estable, el minador es una plaga específica del café y que le ocasiona un daño indirecto. Debido al impacto ecológico ocasionado por las aplicaciones de insecticidas granulares para controlar el minador es necesario seleccionar la mejor técnica de control biológico, una que disminuya la población de la plaga en el menor tiempo posible para evitar la contaminación química. Varias técnicas de control biológico (control biológico clásico, nuevas asociaciones, incrementación) se evalúan desde el punto de vista teórico; todas parecen ser prometedoras. Sin embargo, la incrementación parece ser la más apropiada debido a su sencillez en comparación con otras técnicas que requieren complicados procedimientos tales como: exploración en el extranjero, cuarentena, etc. La incrementación de la población del parásito, Mirax insularis Muesebeck (Hymenoptera: Braconidae), en el campo, justo antes de que las poblaciones del minador aumenten, se puede realizar utilizando liberaciones masivas del parásito criado en invernaderos. Esta técnica es posible ya que el bracónido está bien adaptado en toda la región cafetalera de Puerto Rico. Además, se sabe la biología y fenología del minador del café y éste se puede criar usando técnicas de laboratorio. Es necesario, sin embargo, determinar el umbral económico del daño del minador de tal manera que se pueda evaluar apropiadamente el impacto de un programa de control biológico.
REACTION OF LANDRACE POMPADOUR BEANS TO MACROPHOMINA PHASEOLINA ISOLATES
Authors: Rodrigo Echávez-Badel  , Alfonsina Sánchez
Published: March 2022

REACTION OF LANDRACE POMPADOUR BEANS TO MACROPHOMINA PHASEOLINA ISOLATES
SENSORIAL AND CHEMICAL EVALUATION OF SAPODILLA (MANILKARA SAPOTA L. V. ROGEN, ACHRAS SAPOTA LYNN.) VARIETIES
Authors: Rubén Vélez-Colón  , Isabel B. de Caloni  , Sonia Martínez-Garrastazú
Published: March 2022

SENSORIAL AND CHEMICAL EVALUATION OF SAPODILLA (MANILKARA SAPOTA L. V. ROGEN, ACHRAS SAPOTA LYNN.) VARIETIES
Decision Tree Based Intrusion Detection Method in the Internet of Things
Authors: TEKİN Rojbin , YAMAN Orhan , TUNCER Türker
Published: March 2022

Developments in computer and network technologies have also positively affected internet technology. With the development of the Internet, the concept of IoT (Internet of Things) has been invented. Nowadays, IoT devices provide convenience in many areas, and the positive effects of IoT-based systems increase people's quality of life. People want to remotely monitor and manage smart cities, smart homes, and other platforms. However, IoT systems have many vulnerabilities and thus have become the target of attackers. Detecting such attacks and preventing security vulnerabilities will further increase the rate of use of IoT technology. In this work, an intelligent intrusion detection system (IDS) for IoT devices has been suggested. The presented intelligent IDS for IoT devices have been developed on a big attack dataset and this dataset contains 3,668,443 observations. In prior works which used this dataset, researchers worked on a binary classification problem (attacked and normal). However, this research aims to classify the attack types, hence, nine categories have been used. In order to propose a prompt responded IDS model, a fast classifier which is a decision tree (DT) has been employed. Our proposal attained 97.43% classification accuracy on this dataset using 10-fold cross-validation. This accuracy rate frankly demonstrates the classification ability of our proposed IDS model for IoT devices.
Historical Video Games in the Context of Public History: Strategies for Reconstruction, Deconstruction and Politization of History
Authors: Belyaev Dmitriy A. , Belyaeva Ulyana P.
Published: March 2022

Today, historical video games going beyond the boundaries of the purely entertainment framework of screen media are increasingly influencing the formation of the public history infosphere. The aim of the study is a comprehensive analysis of historical video games as a tool for constructing mass historical consciousness and the implementation of ideologized strategies for the politics of memory. Methodologically, the work is based on the concepts of “public history infosphere” and “politics of memory”, as well as the historical method and classification approach. In addition, elements of comparative analysis, the method of narrative research of cultural artifacts and the optics of I. Bogost’s procedural rhetoric are used.
The study determines the specificity and nature of broadcasting historical plots in the context of procedural actualization of video game narratives. Starting from the interactive-procedural nature of video games, the original possibilities and objective constraints in the reproduction of “stories about the past” are revealed. It is demonstrated that the programmatic and subjective-user modalities of a video game existence endow it with rhizome and nomadic characteristics. Video game architectonics has an intention to deconstruct the “metaphysics of presence” and the main repressive instances characteristic of traditional historical narrative. At the same time, based on the concept of simulations by G. Frasca, three main formats of historical video game reconstructions are revealed: factual (plot and setting), logical-dynamic and hybrid. The article identifies the most common ways of distorting, mythologizing and politicizing history in video games. Special attention is paid to the explication of the ideologized concept of “anti-Sovietism” in video game plots, as a form of quasi-historical criticism of the Soviet regime and the continuation of the rhetoric of the “Cold War”.
The results of the study can be used in the expert assessment of the space of public history, in the identification of relevant media tools and meaningful concepts that form its semantic framework. In addition, certain conclusions are essential for the effective correction of memory policy strategies implemented in screen digital media.
The effectiveness of the use of a specialized formula based on hydrolyzed milk protein in children older than 1 year of age with cystic fibrosis
Authors: Bushueva Tatiana V. , Borovik Tatyana E. , Roslavtseva Elena A. , Shen Natalya P. , Simonova Olga I. , Burkina Nina I. , Lyabina Nadejda V. , Sokolov Ina
Published: March 2022

Introduction. Malabsorption syndrome is one of the most common manifestations of intestinal insufficiency in cystic fibrosis (CF). CF being the cause of protein-energy malnutrition, so diet therapy using specialized enteral nutrition products is an integral part of CF complex treatment. Purpose. Evaluation of the tolerability and effectiveness of the domestic specialized semi-elemental formula based on hydrolyzed milk protein «NUTRIEN® Elemental» in the treatment of protein-energy malnutrition in CF children older than 1 year of age with malabsorption syndrome. Materials and methods. Under supervision were 32 CF one year 3 months to 17-year children with a mixed form of the disease and malnutrition. Twelve (38%) children had hypolactasia. Nutritional status was assessed using the WHO-Anthro for 1-5-year children and WHO-Anthro Plus for patients over 5 years of age) programs, and indices of clinical and biochemical blood tests. The average duration of follow-up was 21 day. Statistical processing was performed using « Statistica 6.0» («StatSoft Inc.», USA) and Microsoft Excel 2010. Results. While taking a specialized product, there was a decrease in the number of patients with severe and moderate forms of protein-energy malnutrition, a significant upward trend in such biochemical markers of nutritional status as prealbumin (p < 0.01), transferrin (p < 0.01), total protein (p < 0.01). Conclusion. The use of a domestic specialized product based on hydrolyzed milk protein «NUTRIEN® Elemental» in the diet therapy of sick children with malabsorption syndrome, including CF patients, indicates its positive effect on the indices of the nutritional status of patients and the course of the underlying disease.
Mathematical modelling in the study of the pathogenesis of viral hepatitis in children
Authors: Martusevich Andrey K. , Galova Elena A. , Popovicheva Aleksandra N.
Published: March 2022

The aim of the work is to form a mathematical model of viral hepatitis based on structural modelling, discriminant and factorial analysis of laboratory parameters of patients. Materials and methods. The data array included the results of a comprehensive laboratory testing of 109 children with viral hepatitis B and C (33 parameters). Results. Seven main factors in the pathogenesis of viral hepatitis in children reflect the severity of endogenous intoxication and disorders of protein metabolism, modification of the mode of functioning of enzymes, and supramolecular multi-enzyme complexes in conditions of progression of the first two components. Conclusion. The identified factors of the pathogenesis of viral hepatitis may reflect the endogenous intoxication during disease progression, the state of detoxification enzyme systems, and the further fibrotic changes in the liver.
A Rare Case of Peritoneal Tuberculosis in a 21 Years Old Male Patient
Authors: C Garritano , F Godoy , J Fonseca , LM Cruz , M Oliveira
Published: March 2022

Tuberculosis is among the top 5 causes of death from infectious disease caused by Mycobacterium tuberculosis, it most frequently affects the lungs, although it can compromise the digestive tract, genitourinary, peritoneum, pleura, bones, lymph nodes and meninges, composing the group of extrapulmonary tuberculosis. Peritoneal involvement is the most common form of abdominal type representing 0.1 to 0.7% of all tuberculosis cases. With nonspecific symptoms, without of laboratory findings that would guide the search for Mycobacteria and imaging tests that overlap common in other pathologies, the diagnosis is difficult. In Abdominal Computed Tomography, ascites, smooth peritoneal thickening, densification of the mesentery root, lymphadenomegaly with central necrosis or calcification are observed. Laparoscopy with the biopsy and collection of ascitic fluid is used as a method for diagnosis. The mortality of abdominal tuberculosis can reach 15% and perforation of intestinal loops, malnutrition, anemia, hypoalbuminemia are the main complications. We present the case of a patient presenting recurrent umbilical hernia, whose diagnosis of peritoneal tuberculosis was made during surgery.
Credit Risk Management and Bank Performance: With Special Reference to Specialized Banks in Sri Lanka
Authors: Liyanage Neelwasantha Henegama , Kaluwa Dewa Indika Senadeera , Mohamed Ismail Fathan Ismail
Published: March 2022

The adoption of credit risk management is becoming a crucial factor for every bank. The objective of this study identifies the relationship between the credit risk management determinants revealed by banking soundness index indicators CAMEL (Capital adequacy, Assets quality, Management efficiency, Earnings, Liquidity) on the performance of the License Specialize banks in Sri Lanka. This study is based on secondary data from each bank annual reports. The data were collected from six development bank among seven development banks in Sri Lanka. The sample was selected from the population based on the availability, convenience method, and reliability of data over the set period. The panel data of a sixteen-year period from 2000 to 2016 from the selected banks, were used to examine the relationship between credit risk management and performance. The Return on equity is used as a performance indicator and Capital adequacy and Asset quality were used as indicators of credit risk management. The study used multiple regression to analyze the data. With these findings, it revealed there is a strong impact of the CAMEL components on the financial performance of specialized banks in Sri Lanka. As per the findings of analysis Capital Adequacy, and Asset quality has a negative significant relationship between bank performances of ROE. This study also documented that there is a significant relationship between credit risk management by CAMEL Indicators and the financial performance of specialized banks in Sri Lanka. Therefore, this study suggests that the CAMEL model can be used as a proxy for credit risk management in the context of License Specialize banks Sri Lanka.
Building an Efficient Portfolio Using Sharpe’s Single Index Model(An Empirical Study with Reference to Nifty 50)
Authors: S. Sangeetha  , K. Madane  , J. Muralidaran
Published: March 2022

In recent years, construction of an optimal portfolio has become progressively more challenge, since investors expect maximum return with minimum risk from their respective investment. To achieve this, the investor needs to have appropriate knowledge about the security analysis and portfolio theory for making accurate investment decisions. Even though Harry Markowitz developed a comprehensive model which stated that investors can reduce their risk through diversification, this research paper uses Sharpe ‘s Single Index Model (SIM) to construct an optimal portfolio. Reason being SIM requires very few inputs and is easier to calculate. The results showed that, forty-two stocks were bullish during the study period and benefitted investor with positive returns consistently and eight stocks showed negative trend/returns. As per the results obtained from the model, Optimal Portfolio is built by selecting twelve stocks which are above the cut off rate. This paper throws light not only on the method of constructing the portfolio and its application, but also calculates intrinsic value for the above selected stocks. As the result only 10 stocks show progressive intrinsic value. This research paper found that though nifty 50 was down by 7500 points by last of march, Pharmaceutical field securities strived due to covid 19 crisis.
The Relationship Between Users' Performance Expectancy and Users' Behavioral Intentions to Use Mobile Commerce transactions in the Libyan context
Authors: Dagnoush Salah M.M. , Khalifa Gamal S. A.
Published: March 2022

The purpose of this study is to see how users' performance expectations affect their behavioural intention to use m-commerce applications in Libya. The participants of this study are 310 respondents. Unified theory of acceptance and use of technology (UTAUT) has supported the hypothesis of this study. The findings suggested that there is positively relationship between users’ performance expectancy and users' behavioral intention. Furthermore, performance expectancy has a positive effect on behavioral intention to use m-commerce. This study contributes to the body knowledge on m-commerce usage. It also providing practical guidance for the Libyan government on how to improve user intention for use m-commerce systems.
ELECTROMAGNETIC COMPATIBILITY OF CONTROL AND MEASURING CABLES IN NON-STATIONARY MODES
Authors: Popov Maxim G. , Mankov Petr N. , Melnikov Alexey A. , Dautov Azamat A.
Published: March 2022

The article deals with questions of researching and analysis of voltages induced in protective shields of three-phase shielded conductor in modes of asymmetric short circuits external to generators of power station. The development of recommendations and measures to ensure electromagnetic compatibility of measuring circuits of microprocessor devices is an urgent research task, since it is generally determined by the electrophysical properties of the interference source and the analog-digital element base of the measuring part of the devices. The scientific novelty of the work consists in the development of measures to eliminate the induced electromagnetic influence on control and measuring cables switched to current and voltage measuring transformers. The purpose of the study is to assess the electromagnetic effect of the industrial frequency field on control and measuring cables laid near a phase-shielded current pipeline, as well as to develop measures to ensure their electromagnetic compatibility. The paper presents a method for calculating the distribution of the intensity modulus H of a magnetic field induced by an industrial frequency current from a generator at an electric power station. For the modes of single-phase, two-phase and two-phase short circuits to the ground, patterns of the distribution of the magnetic field intensity modulus H are constructed, a stiffness class is assigned according to the magnetic field effect on control and measuring cables in accordance with the classification. Recommendations to reduce the level of exposure to the magnetic field intensity H are given. In case of using the screen, a repeated calculation was performed to compare and determine the effectiveness of this event. As a result of numerical experiments, the effectiveness of the use of an additional screen as one of the measures to ensure electromagnetic compatibility is justified. The use of an additional steel shield makes it possible to reduce the magnetic field strength on the surface of control and measuring cables to acceptable values and, as a result, ensure reliable operation of microprocessor control, protection and automation devices.
FEED FORWARD NEURAL NET SIGNAL PROCESSING: APPROXIMATION AND DECISION MAKING
Authors: Andreev Vyacheslav V. , Slavutskii Leonid A. , Slavutskaya Elena V.
Published: March 2022

Feed forward artificial neural networks (multilayer perceptron) allow solving a wide range of regression (approximation) and classification (data splitting into subsets) problems. The corresponding algorithms are applied in electrical and power engineering. The peculiarity of such an artificial neural network is that the training sample can be submitted to the input in an arbitrary sequence. Therefore, the signals themselves during artificial neural network training should be formed taking into account their time form. The paper proposes the use of artificial neural network in a sliding time window. Using simple examples of transients and relay protection, the paper analyses the possibilities of the signals’ time form approximation and the problems of recognition using the artificial neural network of the signal parameters near zero and threshold values. It is shown that errors in the operation of the artificial neural network can be compensated. The choice of the duration of the sliding window must necessarily take into account the need for additional processing of data from the output of the neural network in the form of their statistical analysis, the obtained dependencies approximation or smoothing.
AUTOMATION OF CONTROL OF ROOM DEEP OIL PUMP USINGTRACE MODE SCADA SYSTEMS
Authors: Genin Valeriy S. , Vasileva Lidia N. , Ivanova Nadezhda N. , Artykaeva Elmira M. , Dmitrieva Tatiana V.
Published: March 2022

The issues of automation of technological processes are relevant for all industries. The article discusses the issues of automating the control of the operation of oil pumping units widely used in oil production using the TRACE MODE SCADA system from AdAstrA Research Group.

To control the operation of a sucker rod pump of an oil pumping unit, the use of dynamometers is widespread in world practice. Technically, it is easier to carry out a more generalized control of the operation of an oil pumping unit using a wattmetergram, which displays the dependence of the active power consumed by the drive on time or the position of the polished rod. The results of power measurements are transmitted via communication channels to the computer of the SCADA system. Further, preliminary processing of the results of the control of the wattmeter diagram and the calculation of parameters characterizing the operation of the oil pumping unit are performed.

At the stage of data preprocessing, noise filtering is performed using TRACE MODE tools that provide data exchange with MS Excel, MS Access, MS Visual Basic packages. The use of moving average, median filtering, and B-splines methods for this is considered. It is shown that cubic B-splines are an effective method of analytical description and graphical representation of experimental data, reducing the total mean square of the error. The use of splines in comparison with the polynomial approximation gives a slightly better approximation. The results of filtering and calculations by means of the SCADA system are displayed on the dispatcher’s monitor, archived, documented, etc. Thus, the related software products SCADA TRACE MODE and MS allow you to effectively implement complex data processing algorithms.
COORDINATE TRANSFORMATIONS OF THREE-PHASE VARIABLES USING QUATERNIONS
Authors: Korovin Aleksandr V. , Aleksandrov Ivan V.
Published: March 2022

Among the variety of modern approaches to the mathematical description of the power quality indicators during the processes of transmission, distribution, conversion and calculation of the ac electric power, the representation of three-phase models in the form of a purely imaginary quaternion located in a separate subspace of the four-dimensional hypercomplex space allows, in relation to the generally accepted method of analyzing linear circuits, for example, symmetrical components with the selection of a direct, reverse and zero phase sequence for the fundamental harmonic, to take into a more complete account the features of energy consumption, especially in the presence of distortion in the modified forms of harmonic signals. In addition, the division of the quaternion into scalar (real) and partial (imaginary) makes it possible to significantly simplify the subsequent analytical processing of synthesis of a power converters control signals for active filtering and power supply of autonomous loads of an arbitrary type, including a single-phase configuration, by extracting from its composition individual components responsible for both the amplitude-phase asymmetry and the nonlinearity of the characteristics.

The main algorithmic principles of organizing control structures as part of three-phase systems of various functional purposes, as a rule, are based on the conversion of reference signals and current values ​​of measured currents and voltages into state coordinates obtained by rotating the three-dimensional space plane by a given angle. At the same time, the calculated ratios for the numerical determination of the initial variables transformed by rotation in the quaternion basis are a function of only four kinematic parameters, which, other things being equal, leads to a simplification of the control law in relation to the traditional vector-matrix approach using nine direction cosines with six connection equations. In this regard, this paper is devoted to the applied problems of implementing linear transformations by E. Clarke and R.H. Park in terms of four-dimensional hypercomplex numbers, in compliance with the additional requirement of the invariance of scalar quantities after the transition.
EXPERIMENTAL DETERMINATION OF TRANSFER FUNCTIONS OF CONTROL OBJECTS
Authors: Lazareva Nadezhda M.
Published: March 2022

The modern development of computer mathematics systems opens up opportunities for the researcher to obtain a solution to an engineering problem based on the results of simulation modeling. The use of Simulink interactive environment tools is promising for modeling and analyzing a wide class of dynamic systems, as it allows modeling very quickly and without writing a program code. Determining the transfer function of a power electronics device is an urgent task, since this type of converter model allows not only analyzing its operating modes and conducting research to calculate the power section, but also developing a closed-loop control system that provides the required dynamic characteristics.

The article discusses Simulink MATLAB simulation tools used to determine the parameters of electrical circuit models in the form of a transfer function. It is shown that the transfer function of the device can be synthesized from the model of its circuit diagram without the use of programming skills. Examples of using the Simulink toolkit for constructing the transfer functions of an RLC circuit by a given circuit diagram and determining its parameters are given. The article analyzes the shortcomings of simulation tools when modeling converter technology devices. A specific example of identifying the transfer function of the converter from the load voltage acceleration curve is considered. The reliability of the result is confirmed by a computational experiment.
Multimorbidity patterns and associated factors in hospitalized Venezuelan patients: a prospective study
Authors: Marcano-Rojas María V , Carrión-Nessi Fhabián S , Flores-Barrios Vanessa A , González-Lugo Oriana C , Soto Luis
Published: March 2022

Background and Objective: The recognition of the patterns in which diseases are grouped has been growing research focus on multimorbidity. No data on this topic are available in Venezuela. The aim was to identify multimorbidity patterns in adult patients and to determine risk factors for multimorbidity patterns.
Biomarcadores en paciente frágil: una revisión exploratoria
Authors: Ríos Barbosa Fernando , Gutiérrez Londoño Felipe , Ospina Gómez Sebastián , Solano González Juan Sebastián , Rodrigo Bastidas Alirio
Published: March 2022

Introducción: La fragilidad es un síndrome que aumenta la morbimortalidad en adultos mayores; además, debido a su relación con un estado proinflamatorio, múltiples biomarcadores han sido estudiados con el fin de comprender los mecanismos causales. Objetivo: El objetivo de esta revisión exploratoria es identificar los principales biomarcadores inflamatorios del síndrome de fragilidad y su relación con mortalidad.
Certificación o recertificación de competencias en medicina intensiva
Authors: González-Inciarte María Elena
Published: March 2022

El crecimiento de los posgrados en Venezuela ha sido lento. En 1969 la Federación Médica Venezolana, después de un estudio minucioso de su desarrollo, y tomando en consideración las tendencias en otros países, y en especial en América Latina, aprobó la instauración de las residencias docentes como procedimiento para la formación de especialistas. Una de las áreas de mayor trabajo en el desarrollo del currículo de Medicina Intensiva en los países desarrollados tiene que ver con la flexibilidad en la formación. La Recertificación Médica es un proceso de evaluación de la capacitación médica continua, destinada a asegurar a los usuarios de los distintos sistemas de salud la calidad de las prestaciones. Es un proceso que garantiza que el especialista ha cumplido requisitos técnicos y morales. Es un apoyo para la calidad de su formación y de su ejercicio como médico.
In memoriam: Dr. Ítalo Marsiglia Gaudio
Authors: Poleo José Ramón
Published: March 2022

Estimados colegas Individuos de Número, Miembros Correspondientes, Invitados de Cortesía, colegas, amigos y muy especialmente, familiares del Dr. Ítalo Marsiglia. Fue electo Miembro Correspondiente para el puesto No 47 por Caracas el 25 de enero de 2007. Sucedió al Dr. Armando Márquez Reverón. Su trabajo de Incorporación el 17 de mayo 2007 versó sobre “Enfermedad tiroidea autoinmune. Estudio clínico epidemiológicos sobre una muestra de 1 000 casos”, y elegido Individuo de número Sillón XXXV el 13 de junio de 2013. Sucedió al Dr. Alfredo Planchart. Se incorporó el 31 de octubre de 2013 con su trabajo “El arte en la comunicación con el paciente” cuyo juicio crítico lo hizo el Dr. Rafael Muci Mendoza.
Relaciones entre resiliencia, apoyo social, autoestima, emociones negativas, percepción de enfermedad y calidad de vida relacionada con la salud en pacientes con diagnóstico artritis reumatoide
Authors: Vinaccia Alpi Stefano , Riveros Munévar Fernando , Margarita Quiceno Japcy
Published: March 2022

Introducción: La artritis reumatoide (AR) es una enfermedad de alto impacto físico y psicológico, que afecta la calidad de vida, pero hay pocos estudios sobre la relación de variables positivas y dicha calidad de vida. Objetivo: Evaluar las relaciones entre calidad de vida relacionada con la salud, percepción de enfermedad, resiliencia, ansiedad y depresión, apoyo social y autoestima en pacientes con diagnóstico de Artritis Reumatoide.
Correlación entre el proceso migratorio de médicos especialistas venezolanos (2000-2020) y las teorías de migración humana
Authors: Martínez-Millán Sergio A
Published: March 2022

Introducción: La magnitud de la emigración de los médicos en Venezuela que ha ocurrido desde los primeros años del siglo XXI es inédita, y hay indicios de que este proceso menoscaba la atención sanitaria en el país. Objetivo: Analizar en función de las teorías de migración los factores que llevan a médicos especialistas venezolanos a emigrar y los que explicarían la migración de retorno. Métodos: Estudio cualitativo por medio del análisis del relato obtenido de entrevistas semiestructuradas a 20 médicos venezolanos, especialistas en ginecoobstetricia o pediatría, que habían emigrado en el período 2000-2020.
Effects of supplementary oxygen on obese patients with hypercapnia at 2 600 metros of altitude
Authors: Rincón Álvarez Emily , Cuervo Francy Milena , Parra Izquierdo Viviana , Agudelo Natalia , Botero Daniel , Arsanios Martin Daniel , Bastidas Alirio
Published: March 2022

Introduction: Supplementary oxygen on a high flow in obese patients with elevated PaCO2, carries the risk of worsening hypercapnia in patients at sea level. Nevertheless, at an altitude over 2 500 meters over sea level, is unknown the response to supplementary oxygen. Method: Randomized crossover clinical trial in subjects with BMI ≥ 30 kg/m2 and initial arterial blood gases with a PCO2 over 35 mmHg without supplementary oxygen, currently living for over a month at a height over 2 500 meters over sea level. Two tests were performed with supplementary oxygen of 28 % and 50 % to evaluate the PaCO2 on arterial blood gases.
Sobre envelopes de retas intermediárias de curvas planas
Authors:   , Trindade Diego Vieira
Published: March 2022

Dada uma curva γ plana, fechada e convexa, e dois pontos distintos em tal curva, pode-se definir a reta média a qual passa pelo ponto médio do segmento ligando esses dois pontos e a intersecção das retas tangentes em cada um deles. Uma análise interessante, para tais retas, é investigar o comportamento do conjunto chamado de envelope das retas médias. Em nosso estudo, abordamos as ideias fundamentais e alguns resultados da Geometria Diferencial Afim e da Teoria de Singularidades, a fim de apresentaremos qual é o comportamento a cerca do envelope das retas médias. Posteriormente, é feita uma generalização desses conceitos, levando em conta o envelope da família de retas intermediárias, as quais são retas que passam por um ponto intermediário da corda ligando dois pontos distintos da curva e pelo ponto de intersecção das tangentes nesses respectivos pontos, isto é, o Envelope das Retas Intermediárias. Palavras-chave: AESS. Aplicação conormal. Geometria diferencial afim. Ponto médio.
Enhancing Undergraduate Student’s Understanding of Cultural Heritage Studies Through Digital Storytelling Software
Authors: Abet Madzlan , Binti Khalid Nur Khalida , Abdullah Sani Noorfathehah Binti
Published: March 2022

The young generation that grew up after the 21st century is under the influence of digital data, smart gadgets, as well as tools that allow them to process information differently. To date, digital storytelling has been studied as a platform for communicating with students in developing information literacy and cultural understanding. Therefore, this study investigated whether DST can help students increase their knowledge of arts and cultural heritage and improve their engagement in developing technological and scientific skills. A purposive sample of 60 (Group 1 and Group 2) first-year students enrolled in an arts and heritage course at UMT were interviewed using qualitative research with seven (8) open-ended interview questions and the questionnaire was distributed via a Google form. Upon completion of the digital storytelling project, the data was collected and analysed. The results are organised as follows: i) Knowledge and improvement of the subject of arts and cultural heritage management ii) Building technical research skills iii) Affective responses to digital storytelling iv) Working in a group. Digital storytelling enhanced students' experiences, perceptions of cultural competence, and development of research and technical skills. Benefits included the use of creative thinking and ultimately producing a short video on a diversity topic of their choosing without identifying themselves as artists or filmmakers. able to create or enhance meaning through the use of additional tools.
Strongman Rule and Democracy: Translating the Success of Professional Bodies into Democratic Reform in Africa
Authors: Owoyemi Musa Yusuf
Published: March 2022

This paper looks at the rise of strongman rule around the world and in Africa in particular and shows how this is affecting democracy and democratic institutions. The paper explains the implication of strongman rule on democracy by showcasing its rise in different parts of the world in the contemporary time exacerbated by the tenure of the former president of the United States, Donald Trump. Using the qualitative method of text analysis, it examines what has been said by leaders of goodwill and scholars on the need to protect democracy from the onslaught of strongman rule. It talks about the takeover of the democratic space and digital media space by agents of the strongmen and advocated for a quick response in order to save democracy and democratic institutions. Finally, it calls for the adoption of the ethical practices of professional bodies in Africa in reforming democracy in the continent.