bluuebunny/crossref_metadata_2025 huggingface dataset:
Os experimentos de William Harvey sobre o movimento circular do sangue: uma releitura histórica sob as lentes da epistemologia de Bachelard
Authors: Avelar Lucas Martins de , Borges Fábio de Sá , Duarte Mel de Oliveira , Mesquita Nyuara Araújo da Silva
Published: August 2022

Este estudo, de caráter teórico e bibliográfico, teve como objetivo analisar os experimentos de William Harvey com o movimento circular do sangue no corpo humano a partir da Epistemologia de Bachelard. Recorreu-se a fontes que discutem o referido episódio histórico e outras que abordam a perspectiva bachelardiana. A análise indicou que as investigações e os experimentos de Harvey romperam com compreensões de circulação sanguínea vigentes até então e retificaram erros cometidos por estudos anteriores, como os de Aristóteles e Galeno. Todavia, perceberamse, em sua produção, traços de continuísmo materializados pela presença de alguns obstáculos epistemológicos: verbal, realista, animista e do conhecimento unitário e pragmático. Com os estudos de Harvey, cresceram os grupos de médicos e anatomistas dedicados à temática, instituindo-se a cidade científica e o fortalecimento da fenomenotécnica. Ressaltam-se a importância das releituras de episódios históricos à luz de diferentes epistemologias no Ensino de Ciências e seu potencial de irromper visões ingênuas e objetivistas da produção do conhecimento científico.William Harvey’s experiments on the circular blood movement refreshed by the Bachelard’s epistemologyThis theoretical and bibliographic study aimed to analyze William Harvey’s experiments with the circular movement of blood in the human body based on Bachelard’s Epistemology. We resorted to sources that discuss the historical episode and others that approach the Bachelardian perspective. The analysis indicated that Harvey’s investigations and experiments broke with current understandings of blood circulation and corrected errors made by earlier studies, such as those of Aristotle and Galen. However, traces of continuity were noticed in his production, materialized by the presence of some epistemological obstacles: verbal, realistic, animistic, and unitary and pragmatic knowledge. With Harvey’s studies, the groups of doctors and anatomists dedicated to the subject grew, establishing the scientific city, and strengthening phenotechnics. The importance of re-reading historical episodes in the light of different epistemologies in Science Teaching is highlighted, as well as its potential to erupt naïve and objectivist visions of scientific knowledge production.Keywords: Blood circulation. William Harvey. Bachelard. Breakages. Epistemological obstacles
Competencias socioemocionales y resiliencia de estudiantes de escuelas vulnerables y su relación con el rendimiento académico
Authors: Suárez Cretton Ximena , Castro Méndez Nelson
Published: August 2022

El estudio se sitúa en el contexto sociocultural de la vulnerabilidad que presenta la población infantil de la región de la Araucanía que la caracteriza como una de las regiones más pobres de Chile y con los indicadores educativos más bajos. El propósito es explorar el nivel de desarrollo de competencias socioemocionales y su relación con el rendimiento escolar. Las variables investigadas son el potencial de adaptación socioemocional y la capacidad de resiliencia infantil.La muestra estuvo conformada por 718 niños y niñas de 5º a 8º años de educación básica de escuelas municipales vulnerables de la provincia de Malleco. La recolección de la información se llevó a cabo a través de la utilización de dos instrumentos: La escala de Resiliencia Escolar (ERE) de Saavedra y Castro (2008); el Cuestionario de Adaptación Socioemocional en Escolares, validado en Chile por Mathiesen, Merino; Castro, Mora y Navarro (2011). Los resultados obtenidos revelan un buen nivel de desarrollo del potencial de adaptación socioemocional y de resiliencia en niños, y una correlación positiva de estas con el rendimiento escolar. El buen nivel de las variables socioemocionales en los estudiantes connota un factor protector de salud mental, un recurso para compensar efectos de la vulnerabilidad y un potencial a usar para mejorar el rendimiento académico. Confirma la relevancia de la intervención en habilidades socioemocionales.
Effect of production and storage of beer on its sensory stability
Authors: Štěrba Karel , Kyselová Lucie
Published: August 2022

Freshly produced beer is in a state of chemical imbalance and its sensory characteristics change and deteriorate over time. The period when beer resists these undesirable changes is referred to as its shelf stability, which is precisely defined from a microbiological, colloidal and sensory point of view. The sensory stability of beer can be adversely affected by vibrations during transport and improper storage at elevated temperatures, the presence of oxygen and light. Sensory stability can be improved during production, in particular by selecting suitable raw materials, limiting the access of oxygen and reducing the heat load. Although this review is based on well-known and frequently discussed facts, it primarily presents the latest scientific results and theories concerning the sensory stability of beer, which have been published in recent years.
Alpha acids content in Czech hops from the harvest of 2021 – forecast, reality, trends
Authors: Krofta Karel , Fritschová Gabriela , Mikyška Alexandr , Belešová Klára , Vojtěchová Dagmar , Tichá Jana
Published: August 2022

From the brewing and commercial point of view, the content of alpha acids is one of the most important quality parameter of hops, which is subject to significant annual fluctuations. The established system for evaluating the content of alpha acids in Czech hops consists of pre-harvest and harvest predictions and a detailed analysis of reality based on the analysis of all purchasing lots of raw hops. It is differentiated according to varieties and hop growing areas. This article presents the results of the 2021 harvest, discusses the influence of weather conditions, the age of hop gardens and virus-free seedlings on the harvest results, and the relationship of predictions to reality. The average content of alpha acids in the majority Saaz variety in the Žatec, Úštěk and Tršice areas was 4.45, 4.20 and 3.36% by weight in the original respectively. In all areas, the alpha acids content has been significantly affected by the age of the hop growths. The total production of alpha acids in hops harvested in the Czech Republic in 2021 was 414.5 tons. The harvest is the highest in the last 25 years; the result is due to the combination of two factors, both high yield per hectare and high alpha acids content.
Merdeka Belajar: Upaya Peningkatan Mutu Pembelajaran di Sekolah/Madrasah
Authors: Rahmansyah Muhammad Fahmi
Published: August 2022

AbstractDuring the 4.0 revolution, education was required to apply new innovations and be able to compete with other educational institutions. To realize Human Resources (HR) that can advance, enhance and realize the ideals of the nation, institutions must be flexible in organizing and providing the latest learning system in the 4.0 revolution era amidst the conditions of the Covid-19 pandemic, with the concept of independent learning which was initiated by the Minister of Education and Culture. Is expected to be able to realize quality learning and be able to compete in the current development of globalization. The design of independent learning, the leadership of the principal is very meaningful, especially in fostering teachers in delivering material, not free from the concept of an independent learning curriculum which was formed in such a way during the Covid 19 period, so that the learning system accelerates concepts and curriculum development programs that are very fast, so that educational innovation realized in the learning experience is needed by students.Keyword: Freedom of Learning, Curriculum, Quality
Strategi Penilaian Kinerja Guru di Masa Pandemi Studi Kasus di MA Midanutta'lim
Authors: Turrahman Akbar
Published: August 2022

In order to achieve the common goal of maintaining the country's stability from pandemics both in the economic and educational, there needs to be a slight change in strategy in the management of education. The purpose of this study was to know the strategic assessment of teachers performance in pandemic era, this study uses case study research methods. In this study produces several forms the performance assessment process, including the first stage of analyzing the situation and opinions from several sources related to teacher performance in a certain period, then conducting assessment activities on teacher performance that are closed with an evaluation of the results of activities that have been done to improve teacher performance by conveying back to the teacher.
National Exam Elimination Policy by Student during The COVID-19 Pandemic
Authors: Nuha Zaki Ulien
Published: August 2022

Abstract. This study aims to find out the impact of the elimination of national examinations according to junior high school students during the covid-19 pandemic in Batu. This type of research is descriptive analysis with qualitative approach. Data analysis in this study uses source triangulation. Data analysis is taken by reducing data, summarizing all data results, and presented in narrative form and then concluded. The number of research subjects was 6 junior high school students in Batu, as well as data collection techniques, namely observation and interviews. Data analysis in this study is in the form of presentation of data in a short description. The results of data analysis showed that in the implementation of national examinations there is a positive impact that students are encouraged to actively study and negative impacts that students experience psychological and mental pressures because they have to master the learning materials to be tested. Students' graduation is seen from the national test scores to apply to the intended school. This happens so that a policy arises that is the elimination of national examinations.Keywords: Policies, National Examinations, Students, Covid-19 Pandemic Period.
Desarrollo de un equipo electrónico/computacional orientado a extraer información de interés para el diagnóstico de Mildiu en plantaciones de quinua de la costa peruana basado en procesamiento digital de imágenes
Authors:   , Oré Huacles Gian Carlos , Vásquez García, Alexis
Published: August 2022

La presente tesis propone un equipo portátil y ergonómico que permita la captura de imágenes de cultivos de quinua y, mediante un método de procesamiento eficaz, detecte los segmentos donde la planta se encuentra afectada por la enfermedad del Mildiu (representada por un amarillamiento particular sobre las hojas) para así obtener un resultado numérico que represente dicho efecto. La realización de este proyecto resuelve el principal problema del análisis cualitativo en los que se basa el cliente para el diagnóstico de la enfermedad ya que ofrecerá una solución cuantitativa para la identificación y medición de daño en los cultivos que proporcione al agrónomo un dato vital para poder suministrar la dosis adecuada de fungicida a las plantaciones y obtener un producto de mejor calidad. Este trabajo se basa en dos procesos de segmentación: primero, se realizó, a partir de la imagen original capturada, la segmentación de vegetación sobre el entorno mediante el modelo de color L*a*b, histograma bidimensional, filtrado y binarización; y, segundo, se realizó, a partir de la imagen resultante del primer proceso, la segmentación de amarillamiento sobre la vegetación mediante de los modelos de histogramas bidimensionales, filtrado, binarización y propiedades de excentricidad. Para la validación se tomó 50 imágenes de un cultivo de quinua del Instituto Nacional de Innovación Agraria (INIA) - Sede Lima, las cuales fueron procesadas a través del equipo desarrollado y verificado por el agrónomo especialista. Finalmente, se utilizó el índice de Kappa de Cohen para comparar los resultados donde se obtuvo un resultado de 0.789.
Comportamiento del consumidor y posicionamiento estratégico de marcas de smartphones entre personas de 19-40 años, Lima- Perú 2019
Authors:   , Prado Cucho Juan Javier , Rojas Trigoso Arturo
Published: August 2022

La presente investigación tiene como objeto de estudio determinar la relación de los factores sociales, culturales, personales y psicológicos del comportamiento del consumidor con el posicionamiento estratégico de las principales marcas del sector tecnológico de teléfonos Smartphone en personas de 19 a 40 años del nivel socioeconómico A y B en los distritos de Miraflores, San Isidro, San Borja, Surco y La Molina en el año 2019.Los resultados del estudio serán de utilidad aplicada para la industria de Smartphone para la elaboración de sus estrategias de posicionamiento en base a los factores sociales, culturales, personales y psicológicos de mayor relación en sus usuarios. Para el desarrollo de la presente investigación, se realizó el análisis de las principales teorías que exponen el tema. La metodología aplicada tiene un enfoque mixto; para el enfoque cualitativo, se aplicaron entrevistas semiestructurada a expertos, y para el cuantitativo, se aplicó encuestas a una muestra representativa de la población. La investigación concluyó que factores del comportamiento del consumidor tienen relación directa con el posicionamiento estratégico de las principales marcas del sector tecnológico de teléfonos smartphone en personas de 19 a 40 años del nivel socioeconómico A y B en los distritos de Miraflores, San Isidro, San Borja, Surco y La Molina en el año 2019.Como hallazgo de la investigación, se identificó que, de acuerdo con el marco teórico, el factor social debería tener una correlación positiva con la estrategia de diferenciación; sin embargo, se obtuvo una correlación negativa débil. Finalmente, se recomienda realizar futuras investigaciones sobre las variables estudiadas, pero en otros mercados geográficos del mismo sector tecnológico.
Riesgo de trastornos de la conducta alimentaria y comportamiento alimentario inadecuado en estudiantes de la carrera de nutrición y dietética de una universidad privada de Lima
Authors:   , Paredes Vargas Jodie Ximena , Chau Miyakawa Kiara Lorena Harumi
Published: August 2022

Esta investigación busca determinar la asociación entre el riesgo de trastornos de la conducta alimentaria (TCA) y el comportamiento alimentario en estudiantes de nutrición y dietética de una universidad privada de Lima. A 264 estudiantes se les aplicó una encuesta sobre sus datos personales y los cuestionarios EAT-26 y TFEQ-r21. Se utilizaron la prueba de Chi cuadrado para para analizar la asociación entre las variables categóricas y la prueba de t de student para variables numéricas. Del total de estudiantes incluidos en el estudio, el 18,2% presentó riesgo de padecer TCA. El mayor riesgo fue encontrado en estudiantes de segundo año de la carrera y el menor riesgo en los de último año (p=0,048). De las 3 subescalas del cuestionario TFEQ-r21, “restricción cognitiva” fue la subescala con las puntuaciones más altas, indicando alto riesgo a tener comportamiento alimentario inadecuado en estudiantes de ambos sexos con un promedio de 2,93(DE:0,45; p<0,001). Se encontraron asociaciones positivas entre el riesgo de padecer TCA con el peso corporal (p=0,027), el autorreporte de residencia en mujeres (no vivir con familia) (p=0,013) y con la no omisión de comidas en hombres (p=0,010). En conclusión, se encontró alta prevalencia de riesgo de padecer TCA, sobretodo en los estudiantes de segundo año académico y de sexo femenino en la carrera de nutrición y dietética. Además, se encontró una alta tendencia a la restricción cognitiva en los estudiantes de la carrera. Debe haber mayor conciencia y preocupación por prevenir, detectar y abordar los TCA en los estudiantes de nutrición, puesto que los TCA no sólo pueden afectar su salud física y mental, sino también su criterio profesional a futuro.
Propuesta de un proceso de Planeamiento, Ejecución y Control de la Producción mediante herramientas de gestión por procesos con la finalidad de mejorar la productividad de las mypes del sector de uvas de mesa en la provincia de Ica
Authors:   , Carranza Duran Juan Jose Sebastian , Cabrera Barrios Yordi Heyse
Published: August 2022

El crecimiento económico disminuye el nivel de pobreza de un país. En Perú, la mayor concentración de empresas son mypes que generan empleabilidad en la población. Las mypes agrícolas enfrentan un gran problema que es la baja productividad. El sector de uvas en el Perú ha tenido un gran desarrollo en los indicadores como la producción y el área cosechada, pero el rendimiento es menor que otros países. Por ello, es fundamental realizar el diagnóstico respectivo para identificar las causas del problema de la zona. El diagnóstico se logró mediante entrevistas a profundidad a 53 productores de uvas en la provincia de Ica. En los primeros resultados se encontró que las actividades de producción se realizan en base a las experiencias que adquirieron de sus ancestros, lo que genera una baja productividad. Además, se tuvo que identificar los factores que afectan a 3 procesos relacionados con la gestión de calidad, planeamiento y control de la producción, y la gestión logística. La presente investigación propone diseñar un proceso de planeamiento, ejecución y control de la producción mediante las herramientas de gestión por procesos con la finalidad de incrementar la productividad de uvas en la provincia de Ica.
La relación entre la reciprocidad de la comunidad, la distancia social afectiva, y la receptividad de la comunidad en la recomendación online de productos de ropa femenina en Facebook e Instagram, en las mujeres de 21 a 35 años en los distritos de Surquillo, Barranco y San Juan de Miraflores en Lima Metropolitana
Authors:   , Meneses Salvatierra Gabriela Yolanda , Saldarriaga Diaz Diego Arturo
Published: August 2022

La presente investigación tiene como objetivo principal determinar si existe relación entre la reciprocidad de la comunidad, la distancia social afectiva, y la receptividad de la comunidad en la recomendación online de productos de ropa femenina en las redes sociales de Facebook e Instagram, en las mujeres de 21 a 35 años de edad y que residen en los distritos de Surquillo, Barranco y San Juan de Miraflores en Lima Metropolitana. Para ello, se realizó un estudio con un enfoque mixto, ya que emplea una metodología cuantitativa y cualitativa. Se empleó un estudio descriptivo y correlacional para determinar la relación entre las variables (reciprocidad de la comunidad, distancia social afectiva, receptividad de la comunidad y recomendación de productos) y para determinar un patrón predecible en nuestro segmento de interés. Asimismo, se realizó una entrevista a profundidad a una experta en el rubro de la moda para poder validar nuestros objetivos e hipótesis. Se realizaron 4 entrevistas a influencers o bloggers de moda, quienes también cumplen un rol importante en la generación de recomendaciones online, con la finalidad de obtener información relevante sobre nuestro segmento de interés. A su vez, se realizó un análisis factorial confirmatorio con la finalidad de validar la teoría propuesta en el marco teórico. Finalmente, se aplicó una encuesta a una muestra de 382 personas, donde se recabó la información necesaria para realizar el análisis estadístico e inferencial respectivo.
Simulation of Solar Cell Device Performance Based on Hydrogenated Microcrystal Silicon (µc-Si:H) With Finite Element Method (FEM)
Authors: Asmin La Ode
Published: August 2022

The structure and thickness of the solar cell device layer have a big impact on how well the solar cell works. There for, the aim of this study was to examine how hydrogenated microcrystalline silicon solar cells’ thickness and device structure affected how well they work. Simulation or modeling of the structure in one dimension (1D) is used for the analysis.  MATLAB programming was used to analyze the simulation result. The optical band gap changes due to the influence of the structure, therefore the thickness of the p-, I, and n layers are kept constant at 250 Å, 9000 Å, and 250 Å respectively. The results showed that the maximum performance is obtained at the optical band gap, Eci = 1,39 eV, and the resulting power is 0.063465 Watt. Whereas in the simulation of the effect of the thickness on the i-layer, the optical band gap is set to a constant value of Eci = 1,4 eV, while the thickness of the p-layer and n-layer is set to 250 Å. The results also indicate that the maximum performance is at the i-layer thickness of 9000 Å and the power generated is 0.063364 Watt.
The Effect of Participatory Learning Models Using Critical Problem Solving Techniques on the Learning Achievements of Physics Students
Authors: Ernita Nevi
Published: August 2022

The choice of teaching strategies made by teachers is one of the elements that influence how well students learn. The teacher-centered method causes less meaningful learning for students. Learning is still largely theoretical and infrequently relates what students are taught to their everyday lives. The purpose of this study is to evaluate how well students learn physics utilizing a participatory learning model and critical problem-solving skills. The study used an experimental design (control group pre-test post-test design) involving class VIII SMPN 3 Batukliang, with the research sample being class VIII A students as the experimental class and class VIII B students as the control class. A straightforward random sample method was used for sampling. Learning outcomes determined by testing are used to determine student achievement. A descriptive and statistical analysis of student achievement in two classrooms (experimental and control) was conducted. Average scores for each treatment group are used in the descriptive analysis, whereas variance is questioned in the statistical analysis using the t-test. The effect of the participatory learning model using critical problem-solving techniques (experimental group) was measured by the difference in student achievement when compared to the control group after analysis using a t-test. The t-test findings show that, at the 95 percent confidence level, the t-count value (4.249) is higher than the t-table (1.675). Based on these results, it can be concluded that the participatory learning model using critical problem-solving techniques has a significant impact on increasing students' learning achievement in physics.
Filsafat Ketuhanan Mulla Shadra
Authors: Marzuki Halimatuzzahro
Published: August 2022

Mulla Shadra adalah seorang intelektual Muslim terbesar pada masanya dengan sebuah karya yang sangat fenomenal berjudul Al-Hikmah Al-Muta’aliyah. Secara garis besar, sumber ajaran Mulla Shadra berasal dari empat sumber utama. Pertama, Filsafat Paripatetik Islami. Kedua, teosofi dari Suhrawardi dan para pensyarahnya seperti Quth al-Din Syirazi dan Jalal al-Din Dawani. Ketiga, ajaran tasawuf Ibnu Arabi. Keempat, Syari’at Islam termasuk sabda Rasulullah dan Imam-imam Syi’ah. Sedangkan bangunan al-Hikmah al-Muta’aliyah secara epistemologis didasarkan pada tiga prinsip: intuisi intelektual, pembuktian rasional dam syari’at. Sedangkan secara ontologis, al-Hikamah al-Muta’aliyah didasarkan pada tiga hal: Ashalah al-Wujud, Tasykik al-Wujud dan gerakan Substansial. Seperti filosof sebelumnya Mulla Shadra berusaha untuk menjawab masalah esensi (mahiyah) dan eksistensi (wujud).
Students’ perceptions of online reading behaviour at an institution of higher learning in South Africa: A pilot project
Authors: M. De Jongh , C. Milton
Published: August 2022

Technological advances and the internet have altered the way people engage with reading material. Students’ reading preferences are increasingly screen-based as most students prefer and are required to use online reading in higher education institutions. The research explored the perceived impact of online reading on students’ reading comprehension and academic performance. A non-experimental research design was utilised for this survey, typically including the quantitative domain and, to a lesser extent, the qualitative domain. Seventy-one students who were available and consented completed the survey and included 20 first year, 19 second year, 22 third year and ten fourth year students. The results from a pilot study conducted on first to final year students at a department from a Health Care Sciences University indicated mostly positive feedback regarding the perceived effect of online reading on reading comprehension and academic performance. Most students prefer online reading as it is easily accessible, visually interactive and provides unlimited access to information. The results showed correlations and contradictions to the findings presented in the literature. Conclusions, recommendations and implications are made based on the findings of the study. The findings indicate that students, especially first-year entering students, should be prepared for online reading and be made aware of online reading techniques to support them in attaining academic literacy. These reading techniques could improve the throughput rate and lower the dropout rate in higher institutions in South Africa.
Review of research publications on postdoctoral research fellowship: Implications for African institutions
Authors: Z. Moyo
Published: August 2022

The recent surge in global knowledge production has attracted focus on postdoctoral research fellowship in developed countries, leaving this group of African academics in the shadows. This article reported the results of a systematic review of research of postdoctoral research fellowship. The database of this review comprised 44 mixed sources located via a systematic method. The social justice theory was adopted to analyse and interpret the findings. The analysis of data relied on the use of descriptive statistics and graphing techniques. The review found literature published predominantly in European and Anglo-American societies, affirming the emerging status of the African society in the contribution to global knowledge production. Recommendations were made for funding research activities, curbing brain drain and increasing research output in Africa. The study highlighted milestones of progress along topics, methodologies and “blind spots” for future research practice and apprises evidence based decision making by policy makers.
On studious philosopohy of (higher) education?
Authors: Y. Waghid
Published: August 2022

Over a decade my reading of Giorgio Agamben’s writings on philosophy in relation to politics, aesthetics, and religion revolved around how notions of infancy, (im)potentiality, becoming, community, rhythmic and kairotic action can guide an understanding of higher education. Although Agamben has not written specifically about education the above concepts can be recognised as significant to a theory of higher education particularly because his ideas invariably radicalise any understanding of higher education. Such a radicalisation of higher education involves thinking anew about higher education that remains unfinished or what Igor Jasinki (2018) refers to as “education without ends”. In this article, I offer a way of how to think differently about a philosophy of higher education concerning the notion of “education without ends” and in reference to Agamben’s (1985) idea of studious play.
EMBENTUKAN EMBRIO SOMATIK DARI EKSPLAN DAUN RAMIN, SPESIES TANAMAN LANGKA
Authors:   Balai Besar Litbang Bioteknologi dan Pemuliaan Tanaman Hutan, Yelnititis Yelnititis
Published: August 2022

Ramin (Gonystylus bancanus (Miq.) Kurz) is one of the most valuable timbers in Indonesia and the most over-exploited woody species, on the other hand,the success in propagation techniques are still limited. This species has been listed in Appendix II of CITES since 2004as the number of trees and populations continuouslydecline. Tissue culture has been explored for mass propagation, however, this technique still facesthechallenge, mainly in shoot elongation regenerated from single node explants. The purpose of these experiments is to selectthe best auxin (2,4-D, picloram,dan dicamba) and the best concentration of Benzyl Adenine(BA) treatment on somaticembryo formation. A series of experiments of somatic embryogenesis from leaf explant for ramin were conducted at Tissue Culture Laboratory, Center for Forest Biotechnology and Tree Improvement Yogyakarta. Modified Murashige and Skoog (MS) media supplemented with 0,1 mg/Lthiamine; 0,5 mg/l nicotinic acid; 0,5 mg/Lpyridoxine; 2.0 mg/Lglycineand 100 mg/Lmyo-inositolwere used as growth medium. In thisstudy, three different auxins were used as treatments: 2,4-D(2,4 dichlorophenoxy acetic acid), picloram,and dicamba appliedat6.0 mg/L. The observation was made on the texture of callus formed and the performance of the somatic embryos obtained. The results showed thatthe texture of callus obtained is compact formed callus and green in color. The best treatment to induce globular somatic embryos is using 6.0 mg/Lpicloram within eight months. Thebest treatment to induce globular and torpedo somatic embryos is BA 3.0 mg/L treatment
PENGARUH BERBAGAI KONSENTRASI GLUTAMIN TERHADAPPERTUMBUHAN TUNAS Aquilaria malaccensis Lamk. SECARA KULTUR JARINGAN
Authors:   Universitas Muhammadiyah Yogyakarta, C.A Melati , Handayani E , Herawan Toni ,   Balai Besar Litbang Bioteknologi dan Pemuliaan Tanaman Hutan
Published: August 2022

Aquilaria malaccensis Lamk. is a typeof plant that is threatened with extinction due to the high level of illegal loggingfrom the forest. Tissue culture techniques provide an alternative to vegetative propagation on a large scale for conservation efforts. The addition of glutamine to the culture media was intended to increase the growth of A. malaccensisLamk shoots. The research was conducted with quantitative research methods using single factor laboratory experiments with four (4) treatments arranged in a completely randomized design (CRD). The treatments were differentiated based on the addition of glutamine, namely, G0: 0 mg/l; G1: 10 mg/l; G2: 20 mg/l; G3: 30 mg/l. Data analysis used Analysis of Variance (Anova) with a level of α = 5%. The results showed that glutamine could't affect the growth of A. malaccensisLamk, but there was the best trend in the addition of glutamine 20 mg/l
KAJIAN KERAGAMAN GENETIK ANDALAS (MORUSMACROURA) UNTUK KONSERVASI GENETIK FLORA ASLI SUMATERA BARAT
Authors:   Balai Besar Litbang Bioteknologi dan Pemuliaan Tanaman Hutan, Prihatini Istiana , Widyatmoko AYPBC , Qiptiyah Maryatul , Frianto Dodi ,   Balai Penelitian Teknologi Serat Tanaman Hutan, Novriyanti Eka
Published: August 2022

Conservation managementstrategies for native Sumatran species such as andalas (Morus macroura) are currently being developed through genetic diversitystudies. Theseinformationswill be used to enhance ongoing conservation and regeneration programs and to control the exploitation of these high-valueplant species. This initial study aimed to develop a method for extracting DNA from andalas cambium, to select polymorphic RAPD primers and to study genetic diversity using selected RAPD primers. DNA was successfully extracted usingthe CTAB method from all 32 cambium samples collected from Jambi and West Sumatra. Eighteen RAPD primers were screened and six polymorphic primerswereselected (OPO-6, OPY-6, OPY-15, OPW-1, OPW-3 and OPW-4). RAPD analysis using the sixselected primers resulted in 52 polymorphic loci and thevalue of genetic diversity within the population (Hs) of 0.308 and the value of genetic diversity among populations (DST) of 0.091. The highest genetic diversity was observed in Batipuah,Tanah Datar(0.351) whilethelowest was observed in Halaban,Lima Puluh Kota (0.205).A test with AMOVA shows that the genetic diversity between individuals is greater than the diversity between populations.The dendogram based on the genetic distance between populations showsthat the andalas population in West Sumatra is separated into two groups and both are separated from the Jambi population.The results of this study can be used as a basis for further research on several other andalas populations as well as the basic informationfor conservation strategiesof andalas
Sistem Rekomendasi Desain Website Berdasarkan Tingkat Kemiripan Menggunakan Euclidean Distance
Authors: Awaliyah Cahyani Ainun , Prasetyadi Agi , Junaidi Apri
Published: August 2022

The more internet users, the more interest in creating websites for certain purposes. To create a website that can attract visitors, a good website design is required. Website design is an important element in making a website, because the design of a website will create its own impression and image for website users. One of the technological developments is artificial intelligence, namely the Recommendation System which is a computer technology that is able to provide recommendations for the layman, in this study a website design recommendation system based on the Euclidean distance assessment resulted in a "good" SUS (System Usability Scale) grade C “good”.
Perancangan Basis Data Menggunakan Normalisasi Tabel Pada Perusahaan Dagang Barokah Abadi
Authors: Khomsi Pane Sayyid Yakan , Ramadhan Nur Ghaniaviyanto , Adhinata Faisal Dharma
Published: August 2022

Many human activities are related to information systems. Not only in developed countries, in Indonesia, information systems have been widely applied everywhere, such as in offices, supermarkets, airports, and even at home when users interact with the internet. Increased company operations in business activities can not be separated from information technology. The use of information technology is one of the effective steps in data processing, as well as business transactions using increasingly sophisticated computer equipment. A good database design plays a very important role in the performance and smooth running of an agency. So, in this research, a database design will be carried out with table normalization using MySQL at the Barokah Abadi trading company. This research also designs using entity relationship diagram (ERD).
Sentiment Analysis Destinasi Wisata Berdasarkan Opini Masyarakat Menggunakan Naive Bayes
Authors: Alamsyah Rizki , Munandar Tb Ai , Khasanah Fata Nidaul , Setiawati Siti
Published: August 2022

The topic used in this research is to discuss the problem of public opinion on social media related to tourist destinations in Bekasi Regency by implementing the Naive Bayes algorithm to conduct sentiment analysis on existing opinions. This study aims to analyze public opinion on social media towards tourist destinations in Bekasi Regency using the Naive Bayes algorithm. The data used in this study are posts or comments from the public on social media facebook as much as 1000 data. The method of data collection is done manually. The data analysis technique in this study are changing non-standard words, labelling, text preprocessing and naive bayes analysis methods. The results of this study indicate that positive opinion dominates compared to negative and neutral opinions with the results obtained at F1 positive score 83.5%, F1 negative score 68.2% and F1 neutral score 59.5% with positive recall 81%, negative 82% and neutral 55% precision positive 85%, negative 58% and neutral 64% with an accuracy rate of 76%.
Satellite-based estimation of NO2 concentrations using a machine-learning model: a
case study on Rio Grande do Sul, Brazil
Authors: Becerra-Rondón Adriana , Ducati Jorge , Haag Rafael
Published: August 2022

Nitrogen dioxide (NO2) is one of the most important atmospheric pollutants,
affecting human health (increasing susceptibility to respiratory infections) and the
environment (soil and water acidification). In many regions of Brazil, NO2 measurements
at ground level meet difficulties because there are few and unevenly distributed
monitoring stations. Satellite observations combined with machine learning models can
mitigate this lack of data. This paper report results from an investigation on the
ability of a machine learning approach (a non-linear statistical Random Forest
algorithm, hereafter RF) to reconstruct the long-term spatiotemporal ground-level NO2
from 2006 to 2019 using as input parameters NO2 data retrieved from the Ozone Monitoring
Instrument (OMI) sensor aboard AURA satellite, besides meteorological covariates and
localized ground-level NO2 measurements. Results show that the RF model predicts NO2
with an accuracy expressed by an R2=0.68 correlation based on a 10-fold
cross-validation. The model also predicted a mean NO2 concentration of 18.73 μg∕m3 (±
3.86 μg∕m3). The total NO2 concentration over the entire region analyzed showed a
decreasing trend (2.9 μg/𝑚3 𝑦𝑟−1), being 2006 the year with the higher concentrations
and 2017 with the lowest. This study suggests that non-linear statistical algorithm
reconstructions using RF can be complementary tools to in situ and satellite
observations to NO2 mapping.
Comparative analysis of estimated solar radiation with different learning methods
and empirical models
Authors: Comert Mehmet Murat , Adem Kemal , Erdogan Muberra
Published: August 2022

Solar radiation, which is used in hydrological modeling, agricultural, solar
energy systems, and climatological studies, is the most important element of the energy
reaching the earth. The present study compared, the performance of two empirical
equations -Angstrom and Hargreaves-Samani equations- and, three machine learning models
-Artificial Neural Networks (ANN), Support Vector Machine (SVM), and Long Short-Term
Memory (LSTM)-. Various learning models were developed for the variables used in each
empirical equation. In the present study, monthly data of six stations in Turkey, three
stations receiving the most solar radiation and three stations receiving the least solar
radiation, were used. In terms of the mean squared error (MSE), root mean squared error
(RMSE), mean absolute error (MAE), and determination coefficient () values of each
model, LSTM was the most successful model, followed by ANN and SVM. The MAE value was
2.65 with the Hargreaves-Samani equation and, decreased to 0.987 with the LSTM model
while MAE was 1.24 in the Angstrom equation and decreased to 0.747 with the LSTM model.
The study revealed that the deep learning model is more appropriate to use compared to
the empirical equations even in cases where there is limited data.
Climate regionalization of Santa Cruz province, Argentina
Authors:   Municipalidad de Rio Gallegos– Agreement with Instituto Nacional de Tecnología Agropecuaria (INTA), Rio Gallegos, 9400, Santa Cruz, Argentina, Almonacid Leandro , Pessacg Natalia ,   Instituto Patagónico para el Estudio de los Ecosistemas Continentales (IPEEC-CCT CONICET-CENPAT), Puerto Madryn, 9120, Chubut, Argentina, Diaz Boris ,   Grupo Forestal, Agrícola y Manejo del Agua (FAMA) – EEA Santa Cruz – INTA, Rio Gallegos, 9400, Santa Cruz, Argentina, Peri Pablo L. ,   Grupo Forestal, Agrícola y Manejo del Agua (FAMA) – EEA Santa Cruz – INTA – UNPA-CONICET, Rio Gallegos, 9400, Santa Cruz, Argentina
Published: August 2022

Climate regionalization is essential for characterizing spatial and temporal climatic variability, producing meteorological forecasts, analyzing trends at different scales, and determining the climatic impact on human activities. The aim was to propose a climatic regionalization for Santa Cruz province, based on gridded rainfall and temperature data (period 1995 to 2014), and subsequent characterization. We applied the non-hierarchical k-means clustering method to monthly accumulated rainfall and monthly average temperature databases to achieve this goal. The Thornthwaite classification modified by Feddema was used to classify each cluster. Results from this study showed that Santa Cruz province is divided into 11 climatic regions based on rainfall and temperature. The driest and warmest regions are located in the center and northeast of the province and the most humid and coldest ones in the south and southwest. Regionalization is an important component of many applied climate studies and it can be used in other studies related to agriculture, energy production, water resource management, extreme weather events, and climate change, among others. This regionalization in particular can be used to examine the impacts of climate change in regional studies of climatic scale reduction in Santa Cruz province. It can also be essential in the study of drought and its impacts, and contributes to a better understanding of the climatic phenomena that condition drought.
TECHNICAL COMPARISON OF INFRARED LONG WAVE HEATERS
Authors: Ivakhnov Andrii , Bulhakov Olexii , Fedorchuk Stanislav
Published: August 2022

In the work, a technical comparison of three samples of long-wave infrared, ceiling heaters of Ukrainian production by the firms Bilux, Teplov, Teplotema, with a rated power of 600 W. It was found that the Bilux heater has the lowest heat losses due to the body, and the temperature conditions of the device indicate reliable operation during prolonged use at maximum power. Teplov and Bilux can be compared as follows: Teplov has lower losses through the housing from above and higher from the side, so in balance they are the same in terms of heat loss. The Teplotema heater is the least reliable and has the highest heat loss through the housing. According to the thermal track, the Bilux heater is the most efficient, and Teplov is the least efficient. According to the efficiency calculation, Bilux heaters are 68% more efficient than Teplov heaters, and 19% more efficient than Teplotema heaters.
EVALUATING THE EFFECTIVENESS OF STATISTICAL PROCESSING PROCEDURES TO IMPROVE THE RELIABILITY OF THE RESULTS OF IN-SERVICE CONTROL OF THE CONDITION OF TRANSFORMER OILS
Authors: Shutenko Oleg , Ponomarenko Serhii
Published: August 2022

Using the results of periodic transformer oil condition tests on 91 transformers, 110 kV from four regions of Ukraine, we analyzed the effectiveness of statistical processing procedures to reduce the heterogeneity of data and highlight gross outliers from the results of operational control of transformer oil condition. In the process of researches we analyzed the efficiency of nonparametric two-sample Wilcoxon criterion for equality of mean values, parametric Fisher-Snedekor criterion for equality of variance and parametric criterion for significance of pair linear correlation of indicators and duration of operation, as well as their combinations. These criteria were used to test the results of physical and chemical analysis of transformer oils by 11 indicators and for the results of analysis of gases dissolved in oil. As a result of sequential testing, eight data sets for each indicator were formed and used to evaluate the effectiveness of the analyzed statistical criteria and their combinations. Evaluation of the effectiveness of the analyzed statistical criteria and their combinations was carried out on the basis of analysis of the closeness of the correlation relationship between the indicators with the subsequent assessment of the information significance for each of the indicators. As a result, we proposed a method for selecting the optimal number of the most informative indicators of quality, based on statistical analysis of the results of periodic tests of transformer oil. As an example of practical use of the suggested method a regression model to estimate oil aging degree has been developed and its adequacy has been proved.
Diferencias en la imagen corporal entre escolares adolescentes femeninas practicantes y no practicantes de gimnasia acrobática
Authors: Peláez Barrios Eva María , Vernetta Santana Mercedes
Published: August 2022

El objetivo del estudio fue analizar y comparar la insatisfacción corporal y características de relación morfológicas en escolares adolescentes practicantes y no practicantes de gimnasia acrobática del sexo femenino y ver su relación con ambas variables. La muestra estuvo compuesta por 128 adolescentes practicante y no practicantes de gimnasia acrobática con edades comprendidas entre los 12 y 18 años. La imagen corporal fue medida con el Body Shape Questionnaire y para las medidas antropométricas se tomaron el peso y la altura para calcular el Índice de Masa Corporal y el perímetro de cintura; y con los pliegues cutáneos tricipital y subescapular se calculó el porcentaje de grasa corporal. Los resultados indicaron que el 75.3% de las gimnastas y el 41.1% de las no practicantes presentan satisfacción corporal con diferencias significativas (p < .001). Además, el 53% de la muestra presentan un IMC saludable siendo este porcentaje más elevado en las gimnastas que en las no practicantes. Existe asociación entre la variable IC con el peso, pliegue subescapular, porcentaje de grasa corporal y edad en el grupo de gimnastas, no dándose esa relación entre la imagen corporal con ninguna variable antropométrica en las no practicantes. Como conclusión se constata que la satisfacción corporal es mejor en las practicantes, existiendo una relación entre la práctica de la gimnasia acrobática y la imagen corporal.
Compliance with COVID-19 measures in adolescents and related sociodemographic and educational variables
Authors: Espejo-Siles Raquel , Zych Izabela , Llorent Vicente J.
Published: August 2022

Increasing rule compliance in adolescents is one of the greatest challenges during the pandemic. Understanding how different variables are related to compliance with COVID-19 regulations in adolescents is needed to improve policy and practice against it. This study aims to analyze how sociodemographic and educational variables such as sex, age, socioeconomic status, being in a minority group, academic performance and failure, and problem behavior at school are related to the compliance with some COVID-19 regulations in a representative sample of 1,498 students (aged between 11 and 17 years M = 13.58, SD = 1.32) of compulsory secondary education in Andalusia (Spain). Results showed that almost one out of three participants never kept the recommended social distancing. In contrast, nearly 85% of the participants wore a mask every day when they spent time with their peers. A higher number of failed subjects and school suspensions were related to less compliance, younger adolescents complied more with the COVID-19 measures and ethnic minorities were less compliant than the majorities. Regression analysis showed that the higher school performance, male sex, young age, being part of a sexual minority and feeling bad about the pandemic were uniquely related to more compliance with preventive measures. Programs to promote equalitarian education and programs to promote school success could be useful to increase the compliance in adolescents.
Performance Analysis of the Hybrid Voting Method on the Classification of the Number of Cases of Dengue Fever
Authors: Rahman Arief , Prasetiyowati Sri Suryani
Published: August 2022

Dengue hemorrhagic fever (DHF) is a health problem in Indonesia. The region in Indonesia that has the highest number of cases in West Java with the highest ranking with 10,772 cases. The city of Bandung is recorded to have the highest number of cases at this time, namely 4,424 cases. Dengue fever can be caused by high rainfall. Judging from the high number of cases and fluctuations that occur, it is necessary to predict the spread of the disease so that in the future it can be anticipated by the government. Prediction of the spread of dengue fever in the city of Bandung using various classification algorithms has been done. Therefore, the author wants to make a new breakthrough by using hybrid ensemble learning using a hard voting method from three classification methods, namely Support Vector Machine (SVM), K-Nearest Neighbor (KNN), and Decision Tree (DT). Using the Bandung City DHF disease dataset from 2012 to 2018. The results obtained using the Support Vector Machine (SVM), K-Nearest Neighbor (KNN) and Decision Tree (DT) were 84%, 87%, 79%. to improve the classification accuracy of the three methods using a hybrid classification with the hard voting method to get 91% results.