bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ensino remoto em sistemas municipais de educação no Brasil: percepções dos gestores escolares
Authors: Silva da Rosa Sanny , Martins Angela Maria 
Published: August 2021

Este texto apresenta e discute resultados da pesquisa que buscou caracterizar cenários decorrentes das políticas e estratégias adotadas por Sistemas Municipais de Educação no contexto da pandemia de Covid-19 no Brasil. Os dados focalizam, especificamente, as percepções dos gestores escolares acerca dos processos de implementação do ensino remoto e de seus desdobramentos para a organização do trabalho das unidades escolares dos setes municípios que compõem o Grande ABC Paulista, localizado na Região Metropolitana de São Paulo. A metodologia utilizada foi a abordagem não-probabilística, por meio da técnica bola de neve (snowball sampling), que atingiu 501 sujeitos representantes do público-alvo da pesquisa, entre maio e junho de 2020. Os resultados evidenciam a dispersão de iniciativas por parte das secretarias de educação e das escolas, acarretando consequências graves para os estudantes oriundos dos segmentos mais vulneráveis da população que tendem a aprofundar as desigualdades sociais e educacionais características da sociedade brasileira.
Toxicología de los materiales pictóricos y riesgos sanitarios del artista
Authors: Carbonell-García Carmen Elena , Rodríguez-Román Rufino , Rodríguez-Carbonell Juan Aarón 
Published: August 2021

La actual investigación tiene por objetivo analizar la toxicología de los materiales pictóricos y riesgos sanitarios del artista plástico del Perú. El proceso metodológico fue desarrollado desde un tipo de investigación documental con diseño bibliográfico, teniéndose como muestra poblacional 10 publicaciones relacionadas al tema con la finalidad de conocer los riesgos toxicológicos a los cuales se ven expuestos los artistas plásticos peruanos al plasmar sus obras para el beneplácito de los espectadores. La toxicidad de los materiales que se pueden emplear en la obra, entre los cuales se encuentran mercurio, plomo, arsénico, entre otros, desconocidos al momento de emplear el material que pueden ocasionar graves daños a la salud como sucedió con el síndrome de Ardystil, lo cual fue contraproducente para la salud humana, siendo necesario promover la concienciación tanto del artista como a los fabricantes para evitar acciones perjudiciales contra la vida humana y ambiental.
Storytelling como estrategia de enseñanza en Bachillerato Técnico en el área de Turismo
Authors: Cataña-Brito Mirian Germania , Cárdenas-Cordero Nancy Marcela 
Published: August 2021

Las herramientas digitales deben ser un gran aporte, que, en cierto sentido, permita el desarrollo de la enseñanza – aprendizaje en los estudiantes. Esta investigación tiene como objetivo de estudio analizar de qué manera el uso de Storytelling puede contribuir al aprendizaje de estudiantes de bachillerato técnico en el área de turismo, de la Unidad Educativa Virgilio Urgiles Miranda. En la metodología se realizó un enfoque mixto, con un análisis no experimental de cohorte transversal mediante la recolección de datos con la escala Likert y los resultados obtenidos mediante estadística descriptiva. Mediante la implementación del Storytelling como metodología de aprendizaje permite que las actividades pedagógicas sean más dinámicas para que los alumnos comprendan el contenido de una manera eficaz teniendo en cuenta que las historias e imágenes pueden ser captadas y receptadas de forma concreta y significativa.
Analysis of inverse-piezoelectric-effect-induced lattice deformation in AlGaN/GaN high-electron-mobility transistors by time-resolved synchrotron radiation nanobeam X-ray diffraction
Authors: Shiomi Haruna , Ueda Akira , Tohei Tetsuya , Imai Yasuhiko , Hamachi Takeaki , Sumitani Kazushi , Kimura Shigeru , Ando Yuji , Hashizume Tamotsu , Sakai Akira 
Published: August 2021

Abstract
We developed an in situ measurement system based on a synchrotron radiation nanobeam X-ray diffraction technique combined with a pump–probe method to investigate lattice deformation induced by the inverse piezoelectric effect in AlGaN/GaN high-electron-mobility transistor devices. Static and dynamic measurements using ultrafast X-ray pulses successfully captured changes in the c-plane lattice spacing in the AlGaN barrier layer coincided with the rising and falling edge of the gate voltage pulse at nanosecond resolution. This nanoscale time-resolved analysis reveals the influence of transient currents flowing in the device on the lattice deformation response during application of a gate voltage.
Исследования изменения физико-механических характеристик полимерных пленочных материалов на основе полиэтилена, наполненных СаСО3, при воздействии ультрафиолетового излучения
Authors: Мяленко Дмитрий Михайлович , Михайленко Павел Геннадиевич 
Published: August 2021

В современном мире требования к эксплуатационным свойствам различных материалов и получаемых из них изделиям постоянно возрастают, что может быть обеспечено путем выбора сырья и технологических параметров производства. Существенное изменение свойств материала и придание ему новых характеристик возможно за счет введения модифицирующих наполнителей, которые наряду с эксплуатационными изменяют технологические свойства, облегчая переработку материала в изделие при одновременном снижении себестоимости продукции. Разрабатываемые материалы в перспективе должны обеспечить сохранность продукции на всем протяжении ее срока хранения и эксплуатации, а после эксплуатации продукции существенно снизить нагрузку на окружающую среду. Цель работы - выявить склонность к деструкции полимерных высоконаполненных материалов путем определения влияния ультрафиолетового излучения на физико-механические характеристики полиэтиленовой пленки, наполненной карбонатом кальция Эксперимент по облучению ультрафиолетовым излучением наполненных материалов проведен с использованием экспериментального макетного стенда. Физико-механические испытания пленок до и после облучения проводили в соответствии с нормативными документами. Проведенные исследования показали влияние ультрафиолетового излучения на физико-механические характеристики полимерных пленок с большим содержанием (не менее 50%) карбоната кальция, что потенциально может дать хорошие предпосылки для ускоренной деградации и деструкции полимерных материалов и уменьшить экологическую нагрузку на окружающую среду после окончания ее жизненного цикла.
Разработка режимов вакуумной сушки мёда
Authors: Ермолаев Владимир Александрович , Славянский Анатолий Анатольевич 
Published: August 2021

Мёд представляет собой высококалорийный продукт, содержащий в себе целый комплекс полезных микронутриентов. В ряде случаев по технологическим причинам может потребоваться сушка мёда для его добавления в другие продукты. Целью настоящей работы являлся подбор эффективных режимов вакуумной сушки мёда. В качестве объекта исследования выступал мёд гречишный 2019 г сбора. Сушку мёда осуществляли до достижения влагосодержания около 5%. Установлено, что увеличение температуры сушки влечет за собой понижение продолжительности процесса. Длительность сушки мёда при температуре нагрева 60°С приблизительно на 40% меньше, чем при температуре 30°С. Чем выше температура сушки, тем большие удельные энергозатраты наблюдались при обезвоживании мёда. Наименьшие удельные энергозатраты наблюдались при сушке мёда с плотностью теплового потока 9 кВт/м2 при температуре нагрева 30°С и составили 0,66 кВт/кг влаги. Увеличение плотности теплового потока от 2 до 9 кВт/м2 влечет за собой снижение качественных показателей в среднем на 9%. Остаточное давление относительно слабо влияет на органолептические показатели сухого мёда: при увеличении остаточного давления от 2 до 6 кПа органолептическая оценка повышалась лишь на 2 балла. Продолжительность обезвоживания при этом увеличивается на 55 мин. Наименьшие удельные энергозатраты наблюдались при остаточном давлении 4-5 кПа. В результате проведенных исследований были установлены благоприятные режимы для вакуумного обезвоживания мёда: температура нагрева - 30-40°С, плотность теплового потока - 6-7 кВт/м2 и остаточное давление – 4 кПа.
Antioxidant and hypoglycemic activities of various solvent fractions of methanol extract of Terminalia alata Heyne ex Roth trunk-bark
Authors: Nguyen Quang Vinh , Hung Pham Van , Nguyen Anh Dzung 
Published: August 2021

The antioxidant and hypoglycemic capacities of various solvent fractions from the trunk-bark methanol extract of Terminalia alata Heyne ex Roth (T. alata) were investigated. The DPPH radical scavenging assay was used to evaluate the antioxidant activity, and the methods for determination of digestive enzymes inhibitory activity and fasting blood glucose reduction capacity in diabetic rats were used to determine the hypoglycemic activity of the extract fractions. The results indicated that higher total phenolics content was measured with increasing polarity of extraction solvent and DPPH radical scavenging activity coincided with phenolics content. Ethyl acetate fraction (EAF), n-butanol fraction (BF), and water fraction (WF) were obtained. They possessed α-amylase inhibition with the IC50 values of 0.056 ± 0.001, 0.138 ± 0.005, and 0.022 ± 0.001 mg.mL-1, respectively, which were lower than acarbose (IC50 = 0.154 ± 0.02 mg.mL-1). In contrast, IC50 values of α-glucosidase inhibitory activities of these fractions were higher than those of acarbose. In addition, these fractions also lowered fasting blood glucose concentrations in streptozotocin induced diabetic rats at a dose of 200 mg.kg-1 bw (body weight) without inducing body weight loss, which was not observed when treating with acarbose. The EAF and WF of trunk-bark of T. alata are recommended as potent sources for further research on antioxidant and hypoglycemic activities.
Depuration of a Freshwater Clam (Batissa Violacea) from Rewa River in Fiji Using a Bio-Filter Set-Up in Closed and Open Water Circulatory System
Authors: Singh Ashneel Ajay , Ram Ravinesh , Kumar Sheemal Vandhana , Aashna Sheenal , Verma Shipaldika , Naaz Zafiar Tasmeen , Hatha A. A. Mohamed 
Published: August 2021

The effectiveness of the freshwater bivalve Batissa violacea depuration was tested in closed and open water circulatory system over a 48 h period. The closed circulatory system included a sand biofilter. Microbial levels were assessed every 4 h using Total Aerobic Plate Count (TPC) for heterotrophs and Most Probable Number (MPN) for coliforms. TPC and coliform loads in bivalve tissue reduced rapidly to low and undetectable levels in a closed circulatory system while open system showed a slower reduction. Both TPC and coliform loads remained above detectable levels throughout the depuration period. Closed system showed similar patterns of logarithmic reduction of TPC and coliforms in all cases with R2>0.95 and p<0.001. Similar results were observed for tank water however, reduction of TPC and coliforms were slower. Biofilm formation was observed in the interior walls of the aquarium tanks over 48 h in all cases. Physicochemical parameters did not show any significant change. The reduction in TPC and coliform load in B. violacea suggests that biofilter in a closed water circulatory system is a simple, cost-effective, water conserving and effective way to significantly reduce the spoilage and coliform bacterial load that is accumulated in the clams.
Environmental risk assessment of metal-contaminated areas using different bioassays
Authors: Šestinová Oľga , Hančuľák Jozef , Findoráková Lenka 
Published: August 2021

Mining activities in the areas Krompachy and Rudňany-Markušovce were focused on mining and processing of copper and mercury ore and left harmful effects on the region of Eastern Slovakia. The aim of this study is using different screening methods (XRF, Phytotoxkit and earthworm bioassays) for environmental risk assessment of metal-contaminated areas. Elemental analysis by X-ray fluorescence spectrometry indicated severe pollution of studied soils by Cu, Ni, As and Hg, which exceeded limit values. Significant positive correlation is found between Pb and Zn occurrence in the agricultural soil from Krompachy: Kluknava, and for the contents of particular metals in soil from permanent grass vegetation in Kolinovce locality, namely between Pb and Ni, Pb and Zn, and between Hg and Zn contents. A 7-day bioassay and avoidance test with the Dendrobaena veneta was used to assess the environmental risk of heavy metals in soils. The earthworms mortality was very little influenced by metals in Krompachy soils, but rather affected by Rudňany soils tailing. Phytotoxkit results for soils from Krompachy showed inhibition in germination by 32 % and 29 % for Sinapis alba and Lepidium sativum, respectively. Results of the average percentage of growth inhibition by Lepidium sativum was 28 % and 24 % for Sinapis alba. On the other hand, soil samples from Rudňany tailing showed 56 % of germination inhibition by Sinapis alba, and 49 % for Lepidium sativum, respectively. Results of the average percentage of grow the inhibition by Lepidium sativum was 48 %, and 52 % for Sinapis alba Rudňany tailing soils. The significant results (P < 0.05) of the avoidance percentages of Dendrobaena veneta for tested soils were within the range 80 – 100 % in soils Rudňany-Markušovce tailing after 48 h. The variable toxicity of contaminated soils demonstrated the efficiency and usefulness of the Phytotoxkit and earthworm bioassays as a useful tool for evaluation of soil ecotoxicity. The results supported the expected negative impact of the soil samples on the region Eastern Slovakia.
STUDI KEPADATAN KECOA PADA TRANSPORTASI AIR (KAPAL PENUMPANG) DI PELABUHAN TANJUNG PERAK SURABAYA TAHUN 2020
Authors: Hidayat Dessy Rahmadany Kartin , . Ngadino , Sulistio Irwan 
Published: August 2021

Kapal merupakan transportasi air yang dapat menjadi wahana penularan penyakit yang disebarkan kecoa. keberadaan kecoa dalam kapal perlu diperhatikan karena akan berpengaruh pada kesehatan para penumpang dan ABK kapal. Penelitian ini bertujuan untuk menggambarkan kepadatan kecoa pada transportasi air (kapal penumpang) di Pelabuhan Tanjung Perak, Surabaya tahun 2020.Penelitian ini bersifat deskriptif dengan teknik pengambilan sampel insidental sampling. Data dikumpulkan melalui observasi, pengukuran, dan studi literature.Hasil Penelitian menunjukkan kepadatan kecoa P.americana dan B.germanica pada kapal penumpang di pelabuhan Tanjung Perak Surabaya termasuk dalam kategori rendah atau tidak menjadi masalah. Kepadatan kecoa juga dilihat dari faktor lingkungan fisik suhu, kelembaban, dan pencahayaan. Hasil penilaian suhu terhadap adanya kecoa berkisar antara 250C-300C, penilaian kelembaban 50%-78% dan penilaian pencahayaan terdapat pada ruangan dengan pencahayaan dibawah 100 lux.Dapat disimpulkan bahwa kepadatan kecoa bisa dipengaruhi oleh suhu, kelembaban, dan pencahayaan. Disarankan adanya peningkatan sanitasi untuk mencegah dan meminimalisir keberadaan kecoa di kapal penumpang
EVALUASI PENGELOLAAN BANK SAMPAH DI KOTA MOJOKERTO
Authors: Malikah Umrotul , . Darjati , Nurmayanti Demes 
Published: August 2021

Waste management is one of the problems that needs to be prioritized in preserving the urban environment. The Randegan Final Disposal Site in Mojokerto City is unable to accommodate the volume of waste, one of the programs by carrying out Waste Bank activities based on Law Number 18 of 2008 concerning Waste Management. The purpose of this study is to evaluate the planning, organization, implementation, and supervision of waste bank management in Mojokerto City.This study uses a qualitative descriptive approach with interview techniques, field observations and Document Search. The data are grouped based on internal and external environmental factors that exist in the waste banks in 3 (three) sub-districts of Mojokerto City, totaling 25 waste banks. The data obtained were analyzed using SWOT. The results showed that the Strength factor was 1.316 Weakness was 1.361. Opportunity 1.730440232. and Treat 1.147155115. The difference in the total score of the Strenght and Weakness factors (-) is 0.045. The difference in the total score of the Opportunity and Treath factors (+) is 0.583. Position in Quadrant III means that the organization is in a weak position but has a lot of opportunity. The strategy that must be applied in the management of waste banks in Mojokerto City is the WO (Weakness-Opportunity) Strategy, is a combination of internal weakness factors with external opportunity factors.
¿Qué es la inteligencia emocional?
Authors: Samayoa Miranda María de Lourdes , Márquez Munguía Yvette 
Published: August 2021

Si recordamos a las personas que nos han dejado una gran enseñanza y admiración, por ejemplo, los mejores maestros, los mejores jefes y compañeros exitosos, nos daremos cuenta de que no han sido ni los más sobresalientes, ni los más reconocidos o inteligentes. Sin embargo, su huella en nosotros trasciende porque nos trataron como seres humanos, como personas valiosas, a pesar de nuestras debilidades:; estas personas reconocieron nuestras virtudes, se interesaron por nuestros problemas y nos ayudaron a crecer.
Hermosillo, Sonora: ¿Ciudad amable para peatones?
Authors: Espinoza Muñiz Jaime Alonso , Ung López Claudia , Topete González Vannia 
Published: August 2021

Los accidentes viales en la ciudad de Hermosillo han conservado un estándar de comportamiento en los últimos años. En la población se manifiesta una preocupación y cuestionamientos sobre la frecuencia de los mismos. Muertes y personas con secuelas físicas de accidentes de lamentar son el claro reflejo de lo aquí señalado. En el último semestre de 2013 los accidentes en torno a la Universidad de Sonora han dado origen a manifestaciones de parte de alumnos y maestros que demandan mejores condiciones viales en los accesos a la institución. A pesar de lo local del presente artículo, pretendemos poner de relieve el hecho de que en las principales ciudades del mundo se viven procesos similares de crecimiento urbano. Los estudiosos del fenómeno de la ciudad y su desarrollo, atinan en coincidir y calificar dicho crecimiento en hechos comunes e identificables; entre otras características de dicho crecimiento se anotan las que son producto del proceso globalizador y de las demandas de economías en un mapa geográfico de polaridades y de desarrollos desiguales, pero incluyentes por sus mismas economías.
Reflexiones en torno a los riesgos y peligros para los varones en Sonora
Authors: Calvario Parra José Eduardo 
Published: August 2021

Me he planteado un par de ideas e interrogantes con el fin de compartirles sobre el tema de la charla: “Los hombres en Sonora y los posibles cambios”. En primer lugar, una pregunta orientará mis comentarios ¿en qué forma las transformaciones en las identidades masculinas en Sonora tienen que ver, o están relacionadas con el contexto de precariedad, vulnerabilidad y condiciones sociales y medioambientales adversas? ¿Qué hay de cierto en la afirmación de que existe una diferenciación en la exposición a amenazas y riesgos de todo tipo entre varones y mujeres? Y si es así, ¿es una fuente que alimenta las identidades de género?
Resultados de investigación: técnicas y herramientas didácticas empleadas en el aula universitaria
Authors: Maldonado González Blanca Idalia , Rosas Yépez Jacobet 
Published: August 2021

El presente artículo expone los resultados de la investigación "Técnicas y herramientas didácticas que se utilizan el proceso de enseñanza aprendizaje de las materias teóricas del programa de Licenciatura en Trabajo Social de la Universidad de Sonora". Los datos obtenidos en la encuesta aplicada al 65% de la población estudiantil, revela que efectivamente a menor uso de técnicas, herramientas y/o materiales didácticos mayor será la dificultad para el estudiante de acceder al conocimiento impartido en la asignatura. Contrario a esto, a mayor uso de técnicas, herramientas y/o materiales didácticos menor será la dificultad de allegarse a los conocimientos. Este último caso aunado a la incorporación del uso de las Nuevas Tecnologías de la Información y la Comunicación. Se considera puede ser un factor que contribuya a generar aprendizajes significativos y colaborativos en los estudiantes. Estos hallazgos nos permiten reflexionar acerca de la práctica docente en las aulas universitarias y la necesidad de sustentar la labor del profesor en paradigmas de educación que permitan al estudiante construir su propio aprendizaje.
A High-resolution View of Fast Radio Burst Host Environments
Authors: Mannings Alexandra G. , Fong Wen-fai , Simha Sunil , Prochaska J. Xavier , Rafelski Marc , Kilpatrick Charles D. , Tejos Nicolas , Heintz Kasper E. , Bannister Keith W. , Bhandari Shivani , Day Cherie K. , Deller Adam T. , Ryder Stuart D. , Shannon Ryan M. , Tendulkar Shriharsh P. 
Published: August 2021

Abstract
We present Hubble Space Telescope ultraviolet and infrared observations of eight fast radio burst (FRB) host galaxies with subarcsecond localizations, including the hosts of three known repeating FRBs. We quantify their spatial distributions and locations with respect to their host galaxy light distributions, finding that they occur at moderate host-normalized offsets of 1.4r

e
([0.6, 2.1]r

e
; 68% interval) and on fainter regions of their hosts in terms of IR light but overall trace the radial distribution of IR light in their galaxies. The FRBs in our tested distribution do not clearly trace the distributions of any other transient population with known progenitors and are statistically distinct from the locations of LGRBs, H-poor SLSNe, SGRBs, and Ca-rich transients. We further find that most FRBs are not in regions of elevated local star formation rates and stellar mass surface densities in comparison to the mean global values of their hosts. We also place upper limits on the IR flux at the FRB positions of m
IR ≳ 24.8–27.6 AB mag, constraining both satellite and background galaxies to luminosities well below the host luminosity of FRB 121102. We find that 5/8 FRB hosts exhibit clear spiral arm features in IR light, and that the positions of all well-localized FRBs located in such hosts are consistent with their spiral arms, although not on their brightest regions. Our results do not strongly support the primary progenitor channel of FRBs being connected with either the most massive (stripped-envelope) stars or events that require kicks and long delay times (neutron star mergers).
Second Harmonic Electromagnetic Emissions by an Electron Beam in Solar Wind Plasmas with Density Fluctuations
Authors: Krafft C. , Savoini P. 
Published: August 2021

Abstract
Two-dimensional particle-in-cell simulations are performed to study the electromagnetic radiation emitted at the second harmonic 2ω

p
of the plasma frequency by a weak electron beam propagating in a background plasma with random density fluctuations, in solar wind conditions relevant to Type III solar radio bursts. The dynamics of the waves, the beam, and the plasma are calculated over several thousands of plasma periods. For relevant comparisons, simulations with and without applied density fluctuations are performed for the same parameters. This Letter evidences for the first time the impact of density fluctuations on the physical mechanisms driving the generation of electromagnetic waves emitted at 2ω

p
. Results obtained show that (i) the beam radiates electromagnetic waves at 2ω

p
as a result of nonlinear processes of Langmuir waves’ coalescence, despite wave scattering on the density fluctuations that strongly affect the Langmuir spectra; (ii) the fraction of initial beam energy transferred asymptotically to the electromagnetic waves at 2ω

p
is by one order of magnitude smaller when the plasma involves density fluctuations of average level around 5%; (iii) compared to the homogeneous case, the ratio of electromagnetic energy radiated at 2ω

p
to the energy carried by the Langmuir wave turbulence is significantly larger during all the nonlinear stage; (iv) asymptotically, when the plasma is inhomogeneous, electromagnetic emissions at 2ω

p
present isotropized spectra whereas quadrupolar radiation occurs for the homogeneous plasma case.