bluuebunny/crossref_metadata_2025 huggingface dataset:
Fortalecimiento del cuidado a cuidadores de personas con enfermedad crónica en red: resultados del estudio múlticentrico en el Norte de Santander
Authors: Vega-Angarita Olga Marina , González-Escobar Dianne Sofía , Ramírez-Ordoñez Maria Mercedes
Published: July 2021

El proyecto realizado en el Norte de Santander hace parte del Estudio Multicentrico sobre Implementación en Red y Evaluación del Programa Cuidando a los Cuidadores, coordinado por el Grupo de Cuidado al Paciente Crónico de la Universidad Nacional de Colombia, gestora del trabajo colaborativo. Con un abordaje cuantitativo de tipo cuasi experimental, con grupos muestra y control, se realizo medición de la habilidad de cuidado a los cuidadores antes y después de la intervención y análisis comparativo de resultados. La población estuvo constituida por 50 cuidadores para ambos grupos. La investigación mantuvo los parámetros éticos para estudios con seres humanos. Se emplearon los instrumentos inventario de habilidad de cuidado ( CAI) de Ngozi O. Nkongho, caracterización de los cuidadores y el perfil Pulses.Respecto al CAI total y el componente Valor se logró determinar que existen diferencias estadísticamente significativas entre los promedios de los grupos para los dos momentos de medición; siendo significativamente mayor en el grupo estudio tanto en la medición inicial como en la medición final (p<0,01). Lo cual permite concluir que el programa fortalece la habilidad de cuidado total y el valor en los cuidadores que participan en él, y demuestra la necesidad de continuar explorando estrategias de intervención frente a la problemática de la cronicidad. Palabras Clave: cuidadores familiares, enfermos crónicos, los cuidadores programa de atención
Efecto de la concentración de sulfato de sodio en la viscosidad y difusividad térmica de barbotinas de arcillas rojas
Authors: Useche Victor , Peña-Rodríguez Gabriel , Segura-Venegas Emigdio , Gualdron-Sanchez Luis Alberto
Published: July 2021

Se reporta el comportamiento de la viscosidad cinemática (σ) y la difusividad térmica (α) de barbotinas de arcillas rojas utilizadas por la empresa Cerámica Italia S.A en la elaboración de polvos de arcillas atomizadas (spray dried), en función de la concentración de sulfato de sodio (Na2SO4). Las barbotinas presentan un porcentaje en peso de sólido (arcilla) del 64 % y un 36% de agua (líquido). Para mantener condiciones de densidad similares (1.689 ± 0.007 g/cm3) y solo cambiar la viscosidad de la barbotina se realizó una curva de adición de Na2SO4 a la barbotina, desde 0,018% hasta 0,153% en peso, para la medida de la viscosidad se usó el viscosímetro BROOKFIELD-DV-II+Pro; la densidad (ρ) se determinó mediante picnómetro metálico de 100 cm3; la difusividad térmica se hallo utilizando el sensor SH-2 del sistema KD2-Pro, el cual consiste en dos agujas de acero inoxidable separadas 6mm, una que funciona como fuente de calor y la otra como sensor de temperatura. La composición química usando fluorescencia de Rayos X en porcentaje en peso de las arcillas reporta la presencia mayoritarias de SiO2 (64,4%), Al2O3 (21,8%) y Fe2O3 (5,4%). Los resultados reológicos indican que la viscosidad se incrementa cuando la concentración de sulfato de sodio aumenta en la muestra, presentándose un cambio en el estado de dispersión de las partículas, ya que las suspensiones manifiestan un comportamiento desde fluidas hasta alcanzar una mayor viscosidad. La difusividad térmica en función de la concentración de Na2SO4 mostró una desviación promedio del 3.5 % reportándose un valor mínimo de 0.00330cm2/s y uno máximo de 0.00375 cm2/s. Los números de Prandtl ( ) encontrados fueron mucho mayor que uno (Pr >>1) lo cual indica que la capa limite térmica es mucho menor que la capa límite hidrodinámica.Palabras Clave : Viscosidad, Difusividad térmica, números de Prandtl, Fluorescencia de Rayos-X , Sulfato de Sodio.
Mesa de coordenadas cartesianas (x,y) para la perforación de materiales por medio de un microcontrolador 8051 de intel
Authors: Flórez-Prada Omar Yesid
Published: July 2021

En nuestro medio estamos rodeados de una serie de sistemas electrónicos que efectúan operaciones automáticas de acuerdo con una serie de parámetros programados anteriormente por el operario.El presente trabajo muestra el prototipo de una mesa de dos coordenadas (plano cartesiano (X,Y)), la cual utiliza un sistema de desarrollo basado en el microcontrolador 8051 de INTEL (R) (sistema de computo), realizando la función de sistema de control enviando las respectivas ordenes, para ubicar la herramienta en los diferentes puntos del área de trabajo de la mesa, los puntos son programados con anterioridad por el operario, interactuando con el teclado. Para realizar los desplazamientos de la mesa (X,Y), se utilizan dispositivos actuadores encargados de efectuar un movimiento lineal que desplaza la herramienta a la distancia determinada.PALABRAS CLAVES Microcontrolador, sistema de desarrollo, motores paso a paso, lenguaje ensamblador.
Técnicas de minería de datos aplicadas a la valoración de ambientes creativos
Authors: Osorio-Zuluaga Germán Augusto , Sánchez-Giraldo Luis Gonzalo , Duque-Mendez Néstor Darío
Published: July 2021

En este trabajo se presentan los resultados de la aplicación de algunas técnicas de Minería de Datos (DM) sobre la información de una investigación realizada por la Universidad Nacional de Colombia - Sede Manizales en los años 2004 y 2005 en veintitrés empresas de la ciudad, con el fin de determinar el estado de los ambientes creativos para la innovación, desde las dimensiones psicosocial, didáctica y física. Se consideran las técnicas de Análisis Discriminante Lineal (LDA), Análisis de Componentes Principales (PCA) y Análisis de Varianza Multivariado (MANOVA) de un camino para tareas de orden predictivo y descriptivo. Palabras Clave: Minería de datos; creatividad; análisis discriminante; análisis de varianza; análisis de componentes principales
Metodología para el cálculo del nivel integrado de seguridad (sil), aplicada al caso: estudio de un sistema instrumentado de seguridad (sis) de nivel en calderas industriales de alta presión
Authors: Gastelbondo-Barragan Walter , Tarantino-Alvarado Rocco , Aranguren-Zambrano Sandra Maigualida
Published: July 2021

En el presente trabajo se desarrolla la metodología para el cálculo del nivel integrado de seguridad en el lazo de nivel en una caldera industrial de alta presión. El Nivel Integrado de Seguridad (SIL), se obtiene a partir de la representación dinámica de la confiabilidad de cada uno de los elementos que hacen parte de la función instrumentada de seguridad, a través de la cual se obtiene la Probabilidad de Falla en Demanda, el cual es el parámetro fundamental para la determinación del Nivel Integrado de Seguridad de un Sistema Instrumentado de Seguridad.Palabras Clave: Confiabilidad; Nivel Integrado de Seguridad; Cadenas de Markov; Fallas; Sistema Instrumentado de Seguridad; Calderas Industriales.
Identificación de especies de cepas nativas de Trichoderma sp. y Bacillus sp. y evaluación de su potencial antagonista in vitro frente al hongo fitopatógeno nativo Moniliophthora roreri en el departamento de Norte de Santander
Authors: Yanet-Suárez Liliana , Cabrales Claudia Patricia
Published: July 2021

La moniliasis causada por el hongo Moniliophthora roreri es la enfermedad más grave que ataca el cacao, que se presenta en casi todas las zonas del país ocasionando graves pérdidas al agricultor. Se realizó la identificación de la especie de seis cepas del hongo Trichoderma sp. Procedentes de los municipios de: El Zulia, El Tarra, Bucarasica, Cúcuta y el corregimiento de Agua Clara y una cepa bacteriana de Bacillus sp. Aislada en el municipio de Bucarasica, las cuales fueron evaluadas para determinar su potencial antagónico frente a siete cepas nativas del hongo fitopatógeno Moniliophthora roreri aisladas en los municipios: El Zulia, Tibú, Teorama, Sardinata y Bucarasica. Las pruebas de antagonismo que se desarrollaron fueron: plato dual, metabolitos difusibles y plato precolonizado. En todas las pruebas, se empleó un diseño experimental completamente al azar y tres repeticiones por tratamiento. Se pudo establecer que durante los 8 días de evaluación, se ejerció un efecto antagónico e hiperparásitico significativo de (a=0.05) por parte de las cepas de Trichoderma sp. frente las cepas de M. roreri, sólo tres de las seis cepas de Trichoderma sp., mostraron un alto efecto antagónico frente a M. roreri, tanto en forma micelial como metabólica; la cepa bacteriana Bacillus sp., no arrojó resultados positivos en el enfrentamiento. Las cepas del hongo antagónico fueron identificadas como Trichoderma asperellum y Trichoderma longibrachiatum, la cepa bacteriana fue identificada como Bacillus brevis.Palabras Clave: Moniliophthora roreri; Trichoderma sp.; Bacillus sp.; control biológico.
La globalización del saber matemático
Authors: Cervantes Ismael
Published: July 2021

Desde los tiempos de tales de Mileto 585 A.C., Euclides 190 A.C. con su geometría sintpetica hasta G.  .D Birkhoff 1930, con la geometría métrica. el concepto de proyección paralela e isometría ha tenido diferentes enfoques y aplicaciones, llegando a ser uno de los conceptos más relevantes del análisi matemático y de la topología.
Control biológico y respuesta varietal ante hongos patógenos de la caña de azúcar
Authors: Andreu-Rodríguez Carlos M. , Pérez-Gonzáles Mabel , Morales-Gómez Yolanda , Quiñones-Ramos Reinaldo
Published: July 2021

los efectos de biocontrol de Trichoderma viride (Ts-III-85) y Gliocladium Virens (Gv-02) sobre Fusarium moniliforme (Fm-01) y Thielaviopsis paradoxa (Tp-02) y el comportamiento varietal antes estos hongos patógenos se estudiaron en variedades comerciales de caña de azúcar. Para ello se efectuaron varios ensayos de laboratorio con distintos métodos de tratamiento a las estacas e inoculaciones artificiales de hongos patógenos. Los resultados mostraron el efecto de biocontrol de los hongos antagonistas sobre los hongos fitopatógenos, los síntomas fueron menores con tratamientos de T. viride y G. virens en las variedades Jaronú 60/5; Jaronú 64/19 y Cuba 1051/73. La variedad Jaronú 60/5 fue más atacada por F. moniliforme y la Cuba 1051/73 por T. paradoxa.                                                  Palabras Clave: Caña de azúcar, control biológico, Trichoderma, Gliocladium, Ustilago.
Análisis y tratamiento de señales de fuentes sismogénicas de campo cercano a san josé de cúcuta, colombia
Authors: Florez-Gongora Carlos Humberto , Lozano-Lozano Carlos Fernando
Published: July 2021

Esta investigación determina el contenido frecuencial dominante de un conjunto de 69 señales de fuentes sismogénicas cercanas a la ciudad de San José de Cúcuta, obtenidas mediante la Red Nacional de Acelerógrafos de Colombia (RNAC) perteneciente al Instituto Colombiano de Geología y Minería (INGEOMINAS). Se realizó análisis y tratamiento para cada una de las señales. La etapa de tratamiento comprende los procesos de corrección por línea base y el filtrado de la señal sísmica para eliminar bandas de frecuencias no deseadas presentes en la señal. Las técnicas utilizadas para el análisis espectral son la transformada de Fourier y la transformada Wavelet, mediante sus respectivos espectros de amplitudes. Y se simula el efecto local de los sismos analizados para dos perfiles de suelo de formaciones litológicas diferenciadas. Los análisis se realizaron bajo el uso de herramientas computacionales; programas como EERA, SeismoSignal, DEGTRA A4 y MATLAB ®.Palabras Clave: Señal sísmica; transformada de Fourier; transformada wavelet; espectro de respuesta
Caracterización en ambientes biológicos del comportamiento a la corrosión de películas delgadas de ti6ai4v crecidas por pulverización catódica rf sobre sustratos de acero 316l
Authors: Corredor-Vega Edna Consuelo , Ortiz-Otálora César Armando , Vera-López Enrique , Alfonso-Orjuela Jose Edgar
Published: July 2021

En el presente trabaio se crecieron peliculas delgadas de Ti6Al4V sobre sustratos de acero 316L, con la técnica de pulverización catódica magnetrón rt, variando los parámetros de crecimiento. A los recubrimientosse les realizó un estudio morfológico y de composición a través de Microscopía Electrónica de Barrido(SEM) y análisis estructural mediante difracción de rayos X (DRX)). El comportamiento a la corrosión, se estableció por medio de la técnica de espectroscopia de impedancia electroquímica (EIS). Los resultados de SEM muestran que a medida que se incrementa la potencia incidente sobre el blanco la homogeneidad de las peliculas aumenta y la composición de la película no tiene una variación significativa. El estudio de DRX muestra que existe un crecimiento de los planos (110) y (220) de la fase β de la aleación. Los resultados de EIS han permitido determinar que la resistencia a la corrosión se incrementa, pues el valor de la resistencia a la polarización de las probetas recubiertas se incrementa 3 órdenes de magnitud con respecto al sustrato.Palabras Clave: Biomateriales; Películas Delgadas;Corrosión.
Tepki Kuvveti Gözetleyicisi Tabanlı Tork Kontrolü
Authors: ÖZÇINAR Erim Can , UĞURLU Regaip Barkan
Published: July 2021

Bu makalede tepki kuvveti gözetleyicisi baz alınarak bir tork kontrolcüsü tasarlanmış ve etkinliği geri sürülebilir olmayan bir eyleyici ünitesi üzerinde deneysel olarak sınanmıştır. Fiziksel insan-robot etkileşimi için son derece yüksek bir öneme haiz olan tork kontrolü için genellikle tork sensörleri veya özel olarak üretilen burulma yayları kullanılmaktadır. Bu ekipmanlar ise hem sistemi karmaşıklaştırmakta, hem de toplam ağırlığı arttırmaktadır. Tepki kuvveti gözetleyici yöntemi ise sisteme etkiyen dış kuvvetleri kestirebilmekte ve bu sayede sensör kullanmaksızın tork kontrolünün uygulanmasına olanak sağlamaktadır. Bu kestirim genellikle geri sürülebilir sistemlerde daha sağlıklı işlemektedir, dolayısıyla geri sürülemeyen sistemlerde (örneğin 1:100 dişli oranlı sistemler) uygulaması sınırlıdır. Bu noktadan hareketle, geri sürülemeyen bir sistem için tepki kuvveti gözetleyicisi bazlı bir tork kontrolü tasarlanmış ve uygulanmıştır. Sonuç olarak sürtünme kompanzasyonu sağlandığında tepki kuvveti gözetleyicisinin tork kontrolünü sağlayabildiği deneysel bulgular ışığında saptanmıştır.
Pengelolaan Zakat, Infak, dan Shadaqah oleh Lembaga Amil Zakat, Infak, dan Shadaqah Muhammadiyah (LAZISMU) Buleleng
Authors: Yuliana Riska , Suharsono Naswan
Published: July 2021

This research aims is to find out how the management of zakat, infaq and shadaqah by Lembaga Amil Zakat, Infaq and Shadaqah Muhammadiyah Institutions (LAZISMU) Buleleng.  This research is descriptive research. The method use in data collection is interviews, observation and documentation. Meanwhile, the data analysis technique used is data reduction, data display and conclution drawing and verification. The result of this research show and indicate that in the management of zakat, infaq and shadaqah by Lembaga Amil Zakat, Infaq and Shadaqah Muhammadiyah Institutions (LAZISMU) Buleleng has implemented the function of management, there are (planning) is implemented with determine the purposes, programs, and strategies in collecting ZIS, then (organizing) is implemented by determining the organizational structure, (actuating) is implemented with giving comparing between the result and the standart that have been made.
Pengaruh Luas Lahan, Modal dan Jumlah Produksi Terhadap Pendapatan Petani Sayur di Kecamatan Baturiti
Authors: Pradnyawati I Gusti Ayu Bintang , Cipta Wayan
Published: July 2021

This research aimed examine the impact of land area, capital and the total of production on the income of vegetable farmers in Baturiti District. The population in this study is all farmers who have a vegetable farming business in Baturiti District. Researchers took samples from four villages, the majority of which are vegetable farmers, namely Candikuning Village, Batunya Village, Bangli Village and Baturiti Village. The data collectied by questions given to vegetable farmers, and its analysised by multiple linear regression analysis. The results showed that (1) there was a significant simultaneous effect between land area, capital and the total production on income, (2) there was a positive and partially significant effect between land area, capital and the total of production on income. This study shows the contribution of the variable land area, capital and total production to income amounted to 44.2%, while the remaining 55.8% is influenced by other variables not examined in this study.
Penerapan Model Pembelajaran Learning Cycle 5E dalam Meningkatkan Hasil Belajar Siswa
Authors: Jaya I Komang Gangga Parama , Indrayani Luh
Published: July 2021

This study departs from problems in class VII K SMP N 1 Banjar, where student learning outcomes are still relatively low. To overcome these problems research into the application of learning cycle 5e. This study is aimed to determine the increase of sosial studies learning outcomes in class VII K SMP Negeri 1 Banjar through the application of learning cycle 5e of the fourth basic competencies with the material scarcity and human needs, Action, Motif and Economic Principle. The type of the research is Class Action Research (CAR) and the data collected through observation and test method. The type of data is quantitative data.  Based on the results of the study stated that the first cycle of student learning outcomes in the first cycle obtain an average learning completeness is 71,44%, then in the second cycle obtain an average learning completeness is 85,44%. Research results prove that sosial studies learning outcomes can increase after applying learning cycle 5e in class VII K SMP Negeri 1 Banjar.
Efektivitas Model Pembelajaran Blended Learning dalam Meningkatkan Kemandirian dan Hasil Belajar Peserta Didik pada Masa Pandemi Covid-19
Authors: Mufidah Nur Lailatul , Surjanti Jun
Published: July 2021

This research aims to analyze the effectiveness of the Blended Learning learning model that was applied during the Covid-19 pandemic and is seen based on the responses of students. In addition, this research also aims to analyze how effectively the Blended Learning model is able to increase learning independence and student learning outcomes. This research belongs to the type of quantitative research that uses a quasi-experimental approach with a Posttest Only Control Group Design. The population in this study was class XI IPS at SMAN 1 Puri, Mojokerto. The sampling technique used was the Simple Random Side technique and obtained class XI IPS 1 as the control class and XI IPS 3 as the Experiment class. The research data comes from primary and secondary data. Primary data comes from posttest scores, independence questionnaires and student responses. Meanwhile, secondary data was obtained based on documentation on the value and attendance of students. This research succeeded in proving that blended learning learning could be carried out with a percentage of 95.83%. The effectiveness of the Blended learning model shows a percentage of 73.84%. The implementation of the Blended Learning model is also effective in increasing learning independence which is shown in the Sign value (2-tailed) is 0.021 <0.05, and can also improve student learning outcomes shown in the Sign (2-tailed) value is 0.032 <0, 05.
Pengaruh Ukuran Perusahaan, Earning Per Share dan Return On Asset Terhadap Nilai Perusahaan Sub Sektor Makanan dan Minuman yang Terdaftar di Bursa Efek Indonesia Tahun 2016-2018
Authors: Kehek Cheltis Charles , Cipta Wayan , Suci Ni Made
Published: July 2021

This study aims to examine the effect of company size, earnings per share and return on assets on the value of the food and beverage sub-sector companies listed on the Indonesia Stock Exchange in 2016 - 2018 either simultaneously or partially. The population used in this research is the food and beverage sub sector companies listed on the Indonesia Stock Exchange for the period 2016 - 2018 as many as 11 companies. The research design used is quantitative causal. Data were collected by recording documents, and analyzed by multiple linear regression analysis. The results of this study indicate that: (1) company size, earnings per share, and return on assets have a significant effect on firm value .(2) company size partially has a positive and significant effect on firm value.(3) Earning per share has a negative and significant effect on firm value. (4) Return on assets has a positive and significant effect on firm value.
The Effectiveness Of A Concrete Media Assisted Project Based Learning Model On Students 'Science Competency
Authors: Pratiwi Ni Wayan Aprillia , Manuaba Ida Bagus Surya
Published: July 2021

This study aimed to determine the effect of project based learning model assisted by concrete media toward the competency of science among students grade V SD Academic year 2019/2020. A quasi-experiment was used in this study with the nonequivalent control group design. The total number of students in grade V SD Academic Year 2019/2020 was 13 classes consisting of 371 students used as the study population. Random sampling was used to select the samples. The experimental group in this study was the grade VB  with 32 students, and the control group was students grade VA with 33 students. Data of science knowledge competency was collected using an objective test instrument in multiple-choice totaling 31 items validated. The science competency data was then analyzed by performing the variant polled t-test. Based on the results of the t-test, tcount = 4.17. The score was then compared with the score of table with df = 63. With a significance level of 5% so that the score of table = 2,000 means that Ho was rejected, because tcount = 4.17> ttable = 2,000. Similarly, the average science competency among students in the experimental group x ̅ = 81.43> x ̅ = 70.33 the average of scientific competence of the control group students. The conclusion obtained from this study is that the Project Based Learning model assisted by concrete media significantly influences students' scientific competence grade V SD Academic Year 2019/2020.
Implementation of Online Learning in The Pandemic Covid-19: Student Perception in Areas with Minimum Internet Access
Authors: Laksana Dek Ngurah Laba
Published: July 2021

The application of online learning was carried out massively during the Covid-19 pandemic. Its implementation certainly raises many new things, especially for areas with minimal internet access. For that, it is necessary to conduct a study of how students perceive online learning. The study was conducted to determine students’ perceptions of implementing online learning during the Covid-19 pandemic in minimal internet access areas. This type of research is a qualitative descriptive study, where the research subjects are students of a private university in East Nusa Tenggara, Indonesia. This research was conducted in four stages, namely (1) data collection, (2) data reduction, (3) data presentation, (4) concluding. The instrument used was a questionnaire consisting of 21 questions. Data analysis was carried out descriptively. The results showed that students had different perceptions of the administration of online lectures. These perceptions include perceptions of online learning infrastructure by 57%, online learning skills by 53%, perceptions of the quality of online academic interactions by 69%, benefits of online learning by 53%, obstacles faced by 42%, supporting factors for online learning by 38%, and future online learning expectations of 54%. This study concludes that students’ various online learning perceptions during the Covid-19 pandemic, starting from infrastructure, quality of interaction, and students’ benefits.
Utilization of Classcraft in Developing Positive Student Behavior
Authors: Susila I Komang Dedik
Published: July 2021

Affective assessment in distance learning has a great challenge. One of the media that can be used as well as motivated students is ClassCraft. Meanwhile, some limited persons can implement this media. This research aimed at analyzing the procedures of usingClassCraftin developingstudents' positive attitudes. The research subject was a lecturer and students of English Language Education, Faculty of Teacher Training, Dwijendra University. This research was a descriptive qualitative study that elaborates the implementation of ClassCraft to develop a positive attitude. The data were collected through observation and interview using observation and interview guide. The data were analyzed using qualitative data analysis by Milles and Huberman (1994). The finding showed that the implementation of ClassCraft was implemented in three stages; planning, implementing, and evaluating. It can be a guidance of implementing ClassCraft in developing students' positive behaviors.
The Effect of The Use of Multimedia Flip Book With the Flipped Classroom Approach in Vocational School
Authors: Oktarina Rahmi , - Ambiyar , - M.Giatman , - Fadhilah , Muskhir Mukhlidi , Effendi Hansi
Published: July 2021

The problem encountered in learning operating system teaching materials majoring in network computer engineering is the lack of creativity in students' thinking skills so that they experience obstacles in the practical process. This study used a quasi-experimental design with a pretest-posttest Control Group Design. Data collection techniques using tests. The pre-test was carried out at the beginning to see the students' initial abilities before being given treatment, the post-test was carried out to test the effectiveness or compliance of the application of the treatment. In this study, the data analysis technique used 3 statistical tests, (1) normality test, (2) homogeneity test and (3) hypothesis testing. Through the use of hypothesis testing to show the results of H0 is rejected and H1 is accepted with a significance level of 5% so that the value is (P <0.05). The conclusion is that the use of the Flip book Multimedia with the Flipped Classroom approach is able to improve the thinking skills of students majoring in network computer engineering in the operating system subject. So that later research can be applied to other subjects to help the learning process and increase the creativity of vocational high school students.
The Effectiveness of Youtube as an Online Learning Media
Authors: Rahmatika Rahmatika , Yusuf Munawir , Agung Leo
Published: July 2021

Covid-19 caused a transformation in the educational aspect. Teachers have difficulty implementing online learning. This is due to the lack of learning media that can facilitate students in learning. This study aims to analyze the effectiveness of Youtube as an online learning medium. This type of research is qualitative research. The method used in this research is qualitative research methods. The research subjects were three elementary school teachers. Data collection techniques in this study were interviews, observation, and documentation. The data analysis technique in this research is the analysis technique before being in the field and the analysis of the Miles and Huberman model. The result of this research is that Youtube can be used as a learning medium that helps students learn independently. Parents feel helped by YouTube learning media. Youtube can be accessed easily. In addition, Youtube learning media can be accessed anytime and anywhere so that parents can still accompany learning even though they are working. So it can be concluded that the YouTube learning media is effective in the online learning process. This research implies that Youtube can be used by teachers as a learning medium that can help students in learning. The selection of videos presented on Youtube must be adjusted to the material, age, and psychological development of students so that it makes it easier for students to understand the material presented on Youtube.
PENGARUH DISIPLIN KERJA DAN KEPUASAN KERJA TERHADAP KINERJA KARYAWAN PADA HOTEL BANYUALIT SPA’N RESORT LOVINA
Authors: Aulia Vidia , Trianasari Nana
Published: July 2021

Penelitian ini bertujuan untuk menguji pengaruh (1) disiplin kerja dan kepuasan kerja secara bersama-sama terhadap kinerja karyawan; (2) disiplin kerja terhadap kinerja karyawan; (3) kepuasan kerja terhadap kinerja karyawan. Desain penelitian yang digunakan adalah kuantitatif kausal. Subjek dalam penelitian ini adalah seluruh karyawan Hotel Banyualit Spa’n Resort Lovina. Populasi dalam penelitian ini berjumlah 35. Metode pengumpulan data yang digunakan adalah survey dengan menggunakan kuesioner sebagai instrumen penelitian. Data dianalisis dengan regresi linear berganda dengan memenuhi asumsi-asumsi klasik. Hasil analisis menunjukkan bahwa secara simultan disiplin kerja dan kepuasan kerja berpengaruh signifikan terhadap kinerja karyawan. Selanjutnya, disiplin kerja dan kepuasan kerja berpengaruh secara parsial dan signifikan terhadap kinerja karyawan
Clinical case of severe internal hydrocephalus in Dandy-Walker malformation
Authors:   Ryazan State Medical University, Leonov G.A. , Solomatinа A.S. ,   Ryazan State Medical University, Zorin R.A. ,   Ryazan State Medical University, Zhadnov V.A. ,   Ryazan State Medical University, Burshinov A.O. ,   Ryazan State Medical University
Published: July 2021

Dandy-Walker syndrome is a complex of symptoms presented by a congenital malformation involving essential structures of the brain: cerebellum, ventricles, medulla oblongata, cranial nerves and large vascular trunks, and characterized by especially severe course. In the article, a clinical case of pronounced internal hydrocephalus in Dandy-Walker malformation is described. Peculiarities of the given case are young age of the patient and diagnosis at the advanced stage when a stable neurologic deficit and alteration of the personality of organic type have already been formed. Thus, the performed neurosurgical intervention (endoscopic triventriculocisternostomy) appeared of low effectiveness and caused aggravation of the patient’s condition in the late postoperative period in the form of subdural hematoma which required a repeated operation for its removal. Conclusion. Issue of the internal hydrocephalus in Dandy-Walker syndrome is of much practical interest for both neurosurgeons, and neurologists and radiologists, since the modern diagnosis and effectiveness of treatment directly depend on the coordinated work of these specialists.
Pathophysiology of anemic syndrome in cardiovascular diseases
Authors:   N.N. Burdenko Voronezh State Medical University, Budnevsky A.V. , Simion A.Yu. ,   N.N. Burdenko Voronezh State Medical University, Shapovalova M.M. ,   N.N. Burdenko Voronezh State Medical University
Published: July 2021

Anemia is a pathology characterized by a decrease in hemoglobin level and, in most cases, in the number of erythrocytes in blood. This concept unites a group of diseases with different etiology, which determines the tactics of management of a patient by a physician or hematologist. According to epidemiological data, today 32.9% of the world population suffer from anemia, which evidences the widespread prevalence of this pathology. Anemia is recognized as an independent risk factor for adverse outcome in cardiovascular diseases, and can be considered not only a predictor, but also a marker of a poor prognosis. Anemia is common in patients with pathology of the cardiovascular system: according to the literature, it is diagnosed in one third of patients with chronic heart failure and in 10-20% of patients with coronary heart disease. The process of development of anemia in cardiovascular pathology is multifactorial, the underlying causes are chronic inflammation, sideropenia, hemodilution, decreased production and insufficient activity of erythropoietin. This review describes the main pathophysiological mechanisms of the formation of anemic syndrome in various diseases of the cardiovascular system, analyzes the degree of influence of anemia on the severity of the course of cardiac pathology, and presents the results of recent studies on the problem of the combination of anemia and cardiovascular diseases.
Comparative characteristics of modern methods of surgical treatment of benign prostate hyperplasia (literature review)
Authors:   Ryazan State Medical University, Filimonov V.B. , Vasin R.V. ,   Ryazan State Medical University, Sobennikov I.S. ,   Ryazan State Medical University, Ananin B.A. ,   Ryazan State Medical University, Shirobakina E.Yu ,   Ryazan State Medical University
Published: July 2021

The article presents an overview of modern domestic and foreign literature, dedicated to the problem of surgical treatment of benign prostatic hyperplasia. There exists a wide range of approaches to surgical treatment of benign prostatic hyperplasia. A decision in favor of a certain method is individual and takes into account somatic status of the patient, peculiarities of growth of adenoma and the volume of prostate. In the article, a general tendency of using different endourologic interventions is emphasized. In case of moderate dimensions of the prostate the preferable methods are endoscopic enucleation, transurethral resection and photoselective vaporization of the prostate that are comparable in terms of functional, morphological parameters and duration of recovery period. However, application of non-invasive transurethral interventions in case of the gland volume more than 80 cm3 is limited and requires further improvement of surgical technique. Aquablation, transurethral microwave thermotherapy are promising methods requiring further independent randomized studies.
Philosophical analysis of psychological theories of self-concept
Authors:   Ryazan State Medical University, Baranova A.V. , Mustafina L.Sh. ,   Institute of Psychology RAS
Published: July 2021

The importance of philosophical methodology in the organization of scientific knowledge is recognized. The task of the analysis given in this article was the integration of knowledge on the study of the selfconcept as a psychological phenomenon, since the topic of this research is relevant not only in psychology, but also in philosophy. The history of the development of the self-concept unfolds within the framework of the study of the idea of «I», the consideration of the problems of which originates in ancient cultures and accompanies the entire path of development of philosophical thought, then emerging as a branch of psychological knowledge. Psychological research «I» continues the scientific search for the origins of this phenomenon from the standpoint of various theoretical schools. The study of self-concept is formed as an independent research direction and its central construct, starting with the works of W. James, who for the first time in psychology considers the aspect of considering the «I» by the subject of cognition itself. In subsequent studies, the self-concept is revealed most fully and independentlyin the K. Rogers' phenomenological approach in the mainstream of humanistic psychology.At present, the construction of the selfconcept is influenced by many other theories, both psychological and philosophical, such as Russian philosophical thought of the 20s, the work of transcendentalists and the views of other representatives of philosophy, starting with ideas about the «I» characteristic of the archaic cultures of the East and West.
To the issue of etiology of posttraumatic stress disorder and complex PTSD
Authors:   Ryazan State Medical University, Loschinin G.A.
Published: July 2021

The article provides a theoretical overview and analysis of such a phenomenon as PTSD. The literature data on the study of the issue of posttraumatic stress disorder, in a historical context, from the definition of PTSD as a phenomenon that affected only participants in various military conflicts to a complex multifactorial phenomenon that develops in response to severe stress, is highlighted. In the complex version, it brings trauma and negative experience of interpersonal interaction. The article presents an analysis of the existing problems of diagnosing PTSD, arising from different ideas about the nature of a traumatic event, variations of definitions of this concept by different experts and their attitude to the trauma situation. The article presents the factors, that can lead to the development of PTSD. The prevalence of PTSD is determined by the nature of the traumatic event, its duration and frequency of recurrence. The analysis of studies revealed that the prevalence of PTSD is also influenced by gender, age, socio-cultural attitudes of the individual. In terms of systematic analysis of the scientific literature, studies that indicate that there are differences in the diagnostic criteria between ICD-11 and DSM-5 that affect the diagnostic results were cited. The introduction of such a concept as complex PTSD into modern science can complement the existing theories of the appearance and development of PTSD as a multifactorial disease based on trauma and negative experience of interpersonal interaction.
Resource potential of personality in cardiac surgery patients: characteristics of hardiness and social support
Authors:   Republican Cardiology Dispensary of the Health Ministry of Chuvashia, Nikolaeva O.V. ,   I.N. Ulianov Chuvash State University
Published: July 2021

In cardiovascular surgery, the stress of surgical treatment is added to the traditional psychosocial factors of cardiac pathology. In connection with the tasks of psychological help, data on the resource potential of the personality of a cardiac surgical patient, determined by the totality of his intrapersonal and interpersonal resources, are of particular importance. In this work, based on the assessment of the characteristics of hardiness and social support and taking into account the specifics of the surgical intervention, the features of the resource potential of the personality in cardiac surgery patients at the preoperative stage of treatment were determined. Using the Hardiness Test and the Multidimensional Social Support Perception Scale, 152 patients with cardiovascular diseases who were admitted to the hospital for surgical treatment were studied. Taking into account the volume and nature of the planned surgical intervention, patients were assigned to three clinical groups. According to the results of the study, it was found that in patients preparing for massive open heart surgery, the intrapersonal adaptive resource of hardiness at the level of most components is insufficient. The interpersonal resource of social support is fully implemented in all cardiac surgery patients; in terms of social support for the family and significant others, it is close to excessive. At the preoperative stage of work with cardiac patients, it is recommended to rely more on the resources of social support for the family and significant others. Psychological work with the intrapersonal resource of hardiness can be carried out at later stages of rehabilitation.
Geographic information systems as a part of epidemiological surveillance for COVID-19 in urban areas
Authors: Blokh A. I. , Penyevskaya N. A. , Rudakov N. V. , Mikhaylova O. A. , Fedorov A. S. , Sannikov A. V. , Nikitin S. V.
Published: July 2021

Aim. To identify clustering areas of COVID-19 cases during the first 3 months of pandemic in a million city.

Materials and Methods. We collected the data on polymerase chain reaction verified cases of novel coronavirus infection (COVID-19) in Omsk for the period from April, 15 until July 1, 2020. We have drawn heat maps using Epanechnikov kernel and calculated Getis-Ord general G statistic (Gi*). Analysis of geographic information was carried out in QGIS 3.14 Pi (qgis.org) software using the Visualist plugin.

Results. Having inspected spatial distribution of COVID-19 cases, we identified certain clustering areas. The spread of COVID-19 involved Sovietskiy, Central and Kirovskiy districts, and also Leninskiy and Oktyabrskiy districts a short time later. We found uneven spatiotemporal distribution of COVID-19 cases infection across Omsk, as 13 separate clusters were documented in all administrative districts of the city.

Conclusions. Rapid assessment of spatial distribution of the infection employing geographic information systems enables design of kernel density maps and harbors a considerable potential for real-time planning of preventive measures.
Gut microbiota and urinary tract infections in children
Authors: Levanova L. A. , Markovskaya A. A. , Otdushkina L. Yu. , Zakharova Yu. V.
Published: July 2021

Aim. To evaluate the role of intestinal dysbiosis in the development of urinary tract infections in children admitted to a multidisciplinary hospital.

Materials and Methods. We performed a bacteriological analysis of 2,694 urine samples collected from ≤ 3-years-old children who have been admitted to a multidisciplinary hospital (Kemerovo, Russian Federation). Urine specimens were inoculated by the 4-sector technique. Concurrently, we quantified the intestinal microbiota and its antimicrobial resistance in 100 children with urinary tract infections.

Results. Titers of pathogenic microbes significantly differed in patients from distinct units (p = 0.02). The highest number of positive samples was detected in the neonatal pathology and neonatal intensive care units (43.8% each) as well as urology unit (37.9%). The most frequent pathogens belonged to Enterobacteriaceae family, in particular Escherichia coli, Klebsiella spp., Enterobacter spp., and Proteus spp. All studied children (100/100) suffered from intestinal dysbiosis. Titers of Bifidobacterium spp. and Lactobacillus spp. were reduced to 6 (5.0; 8.0) and 5 (4.0; 6.0) lg CFU/g, respectively. In 89.2% children, Escherichia coli lac+ levels were elevated to 9-10 lg CFU/g. Of note, 18.9% children had high Escherichia coli lac- titers [8 (6.0; 9.0) lg] and 24.3% had high Escherichia coli hly+ titers [5 (4.5; 6.0) lg] in the intestine. We have also found a high frequency (44.6%) and density [8.1 (7.0; 8.5) lg] of Klebsiella spp., in the intestinal mucosa of such patients. Notably, Enterobacter spp. and Proteus spp. were abundant [7 (5.0; 8.0) CFU/g] in the intestinal microbiota of 10.8% children. The prevalence of resistance strains in the studied setting reached 63%.

Conclusions. More than 75% children with urinary tract infections suffer from intestinal dysbiosis. The microbiome of these patients was predominantly composed of Enterobacteriaceae and was characterized by high titers of Escherichia coli lac+, Klebsiella spp., Enterobacte spp., and Proteus spp. Similar profile of antimicrobial resistance in urinary and intestinal isolates of enterobacteria suggests intestinal microbiome as the main source of pathogens causing urinary tract infections in children.
Ultrasound markers informative of efficient non-pharmacological correction of hypofibrinolysis at preconception period in patients with recurrent pregnancy loss
Authors: Lebedeva E. I. , Yavorskaya S. D. , Momot A. P. , Fadeeva N. I.
Published: July 2021

Aim. To find reliable ultrasound markers of efficient non-pharmacological correction of hypofibrinolysis at preconception period in patients with recurrent pregnancy loss.

Materials and Methods. We conducted a single-center, prospective, non-randomized study in patients with recurrent pregnancy loss and hypofibrinolysis (n = 120), who received intermittent pneumatic compression during preconception care. During the pregnancy, we performed a comprehensive 3D ultrasound examination of the endometrium and corpus luteum in the VOCAL mode. Then, we compared patients with (n = 97) and without (n = 23) favorable outcome. Predictive power of the ultrasound parameters was evaluated by a calculation of the area under the receiver operating characteristic (ROC) curve (AUC) and ROC curve comparison.

Results. Vascularization flow index of endometrial perfusion (AUC = 0.566) and corpus luteum (AUC = 0.639) was identified as a potential marker of efficient intermittent pneumatic compression at preconception period.

Conclusions. Adequate perfusion of endometrium and corpus luteum, reflected by vascularization flow index, may indirectly indicate successful trophoblast invasion and minimize the risk of recurrent pregnancy loss.
Prevention of rabies in Southern Siberia
Authors: Zarva I. D. , Botvinkin A. D.
Published: July 2021

Aim. To substantiate the need for coordinating measures to prevent rabies in adjacent territories with similar conditions for the spread of this infection.

Materials and Methods. We retrospectively analyzed spatiotemporal trends in rabies spread during 1950-2020 by studying available statistics from nine Siberian territories (Altai Republic, Altai Region, Tyva Republic, Khakassia, Buryatia, Krasnoyarsk Region, Transbaikal Region, Irkutsk Region and Kemerovo Region). Mapping of rabies cases in humans (n = 124) and animals (n = 1648) was carried out using QGIS 3.16.3, ArcMap 10.8.1 and ArcScene 10.8.1 software and open electronic landscape maps Natural Earth and OpenStreetMap.

Results. We revealed two periods of intensive rabies spread in southern Siberia: 1) from 1950 to 1983; 2) from 2002 to the present time. However, human rabies was recorded only during the first period. In all studied territories, inter-epizootic periods lasted from 10 to > 40 years. Geographical analysis identified a mosaic localization pattern and a relative isolation of the affected areas. After 2002, there has been a connection between location of animal rabies cases with agricultural lands and a consistent advance of epizootics from west to east and north-east in all territories, excepting Irkutsk Region. The identified regional features of the spatial distribution of rabies were due to a mountainous terrain and a connection of some forest-steppe areas with similar landscapes of neighboring countries.

Conclusions. Southern Siberia is characterized by long rabies-free periods and by the infection foci isolated from other areas as a result of periodic viral invasions from adjacent territories. These features determine the common approaches to the organization of preventive measures across the territories, suggesting their increased efficiency due to the numerous natural barriers and the possibility to concentrate the resources within the small areas. Our results indicate the feasibility of a regional approach to rabies control.
Challenges in doctoral supervision in South African universities
Authors: Akala Benard Ungadi
Published: July 2021

This article addresses the challenges encountered by doctoral supervisors as they interact with their doctoral students in the contexts of South African universities. In a qualitative study of seven doctoral (PhD) supervisors and six PhD students, data was collected using interviews to examine the challenges supervisors experience as they supervise doctoral students. The PhD students were included in this study in because their responses would confirm or refute supervisor's views/opinions that emanated from their experiences in a social, cultural, and political context. Data analysis showed that doctoral supervisors experienced multiple challenges including overworking, time, and a set of academic characteristics of PhD students. Overall, the results of this study suggest that certain aspects among doctoral students who have completed doctorates in South African context, and their supervisors in different parts of the world would provide a starting point in the understanding of the implications of these aspects and their effect on the selection of doctoral students and the ongoing research in doctoral supervision in the South African context.  doctoral supervision.