bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis of Cumulant Coefficients of Two-Component Mixtures of Shifted Non-Gaussian Distributions
Authors:   Institute of engineering thermophysics National Academy of Sciences of Ukraine, Krasilnikov A.I.
Published: November 2021

The dependence of the cumulant coefficients of two-component mixtures of shifted non- Gaussian distributions on the weight coefficient is analyzed and conditions are determined under which the cumulant coefficients of any orders are equal to zero. The dependence of the cumulant coefficients of two-component mixtures on the shear parameter is investigated and the parameter values are determined at which the cumulant coefficients of any orders have extrema and zeros. The dependence of the skewness and excess kurtosis of a two-component mixture of shifted Gumbel distributions of type 1 on the weight coefficient and the shear parameter is investigated and their values are obtained at which the skewness and excess kurtosis of the mixture are equal to zero. The features of computer modeling of random variables, the probability density of which is a two-component mixture of shifted distributions, are considered.
Polarization Models of Radiation in a Solar Energy Concentrator System
Authors:   G.E. Pukhov Institute for Modelling in Energy Engineering National Academy of Sciences of Ukraine, Chernozomov Y.S.
Published: November 2021

The possibility of using renewable energy sources (RES) for the production of hydrogen fuel, in particular solar radiation energy, without using the stage of generating electricity is considered. A mathematical model of a reflector with anisotropy of electrodynamic properties is presented. According to the analysis, using the described model, conclusions were drawn about the possibility of using this effect to ensure the transmission capacity of the energy component of solar radiation with partial or complete retention of polarization. Based on the data obtained, variants of collimating optical systems of energy concentrators are proposed that are potentially capable of realizing the photolysis process.
PENGEMBANGAN MODUL IPA BERBASIS ISLAMIC SCIENCE TECHNOLOGY ENGINEERING AND MATHEMATICS PADA MATERI HUKUM NEWTON
Authors: Jannah Misbahul , Oviana Wati , Nurhalizha Iin
Published: November 2021

AbstractThe problem it is found that at the university there is no (Islamic  Science, Technology, Engineering, and Mathematics) I-STEM learning module as a guide for lecturers in implementing science learning. For this reason, this study aims to (1) Design Islamic STEM-based science modules on Newton's Law material (2) Assess Islamic STEM-based science modules on Newton's Law material. This study uses a Design Development Research (DDR) approach using the Dick and Carey instructional design model. The sample of this research is three experts, three senior lecturers and six science lecturers. The instruments of this research are observation sheets, interviews and questionnaires which are analyzed using qualitative and quantitative analysis. Qualitative analysis is used for need analysis and module design. While the quantitative analysis for the assessment of the module which is analyzed using SPSS and excel. The results showed that (1) Islamic STEM-based science module design in Newton's Law material followed the three steps of the Dick and Carey instructional design model, namely needs analysis, module development and module assessment. (2) The results of assessment by expert, senior lecturers and science lecturers show that Islamic STEM-based science modules on Newton's law material are appropriate for using in the science learning process in universities.AbstrakPermasalahan di lapangan didapati bahwa di universitas belum tersedianya modul pembelajaran berbasis Islamic STEM (I-STEM) sebagai panduan bagi dosen dalam melaksanakan pembelajaran IPA. Untuk itu, penelitian ini bertujuan (1) Mendesain modul IPA berbasis I-STEM pada materi Hukum Newton (2) Menilai modul IPA berbasis I-STEM pada materi Hukum Newton. Penelitian ini menggunakan pendekatan Design Development Research (DDR) dengan menggunakan model desain instruksional Dick and Carey. Sampel penelitian ini adalah tiga orang pakar, tiga orang dosen senior dan enam orang dosen IPA. Adapun instrumen penelitian ini adalah lembar observasi, wawancara dan angket yang dianalisis menggunakan analisis kualitatif dan kuantitatif. Analisis kulaitatif digunakan untuk analisis kebutuhan dan dan desain modul. Sedangkan analisis kuantitatif untuk penilaian modul yang dianalisis dengan menggunakan SPSS dan excell. Hasil Penelitian menunjukkan (1) Desain modul IPA berbasis I-STEM pada materi Hukum Newton mengikut tiga langkah dari model desain instruksional Dick and Carey yaitu analisis kebutuhan, pengembangan modul dan penilaian modul. (2) Hasil penilaian pakar, dosen senior dan dosen IPA menunjukkan bahwa modul IPA berbasis I-STEM pada materi hukum Newton layak digunakan dalam proses pembelajaran IPA di perguruan tinggi.
DEVELOPING AN E-FLIPBOOK ON ENVIRONMENTAL CHANGE TOPICS TO DEVELOP STUDENTS’ DIGITAL LITERACY
Authors: Rachim Dinda Ainur , Ambarwati Reni
Published: November 2021

PENGEMBANGAN E-FLIPBOOK MATERI PERUBAHAN LINGKUNGAN UNTUK MELATIHKAN LITERASI DIGITALAbstractDigital literacy is one of the abilities that students need to master in the 21st century. Therefore, this study aims to produce an e-flipbook of environmental change topics to train digital literacy, which is valid, practical, and effective. As a developmental study, it refers to a 4-D model, without a dissemination phase. The material validity was measured based on the validation by material, educational, and information-technology experts. Furthermore, the e-flipbook practicality was measured based on the practitioners and student responses. Also, the effectiveness was measured according to students' digital literacy based on normalized gain score, and the data were descriptive-quantitatively analyzed. The results showed the developed e-flipbook was declared valid based on the eligibility criteria for design, content, and language. Furthermore, it was stated to be practical according to the responses of practitioners and students with the acquisition of very practical and good categories. The e-flipbook was also declared effective with the acquisition of an average score of increasing digital student literacy by 0.7 in the high category. Therefore, it can be concluded that the e-flipbook on environmental change topic is valid, practical, and effective in learning digital literacy. AbstrakLiterasi digital merupakan salah satu kemampuan yang harus dikuasai peserta didik di abad ke-21. Tujuan penelitian ini adalah menghasilkan e-flipbook materi perubahan lingkungan untuk melatihkan literasi digital kelas X SMA yang layak digunakan, yaitu e-flipbook yang valid, praktis, dan efektif. Penelitian ini merupakan jenis penelitian pengembangan yang mengadaptasi model 4-D namun tahap penyebaran tidak dilakukan. Validitas e-flipbook diukur berdasarkan validasi ahli materi, ahli pendidikan, dan ahli IT. Kepraktisan e-flipbook ditinjau berdasarkan respons praktisi dan respons siswa. Keefektifan e-flipbook diukur berdasarkan tes literasi digital peserta didik berdasarkan gain score ternormalisasi. Data dianalisis secara deskriptif kuantitatif. Hasil penelitian menunjukan bahwa e-flipbook yang dikembangkan dinyatakan sangat valid berdasarkan kriteria kelayakan penyajian, isi, dan kebahasaan. E-flipbook yang dikembangkan dinyatakan praktis berdasarkan respons praktisi (guru) dan siswa dengan perolehan kategori sangat praktis dan sangat baik. E-flipbook yang dikembangkan dinyatakan efektif dengan perolehan skor rata-rata peningkatan literasi digital siswa sebesar 0.7 dengan kategori tinggi. Secara keseluruhan e-flipbook materi perubahan lingkungan dinyatakan valid, praktis, dan efektif digunakan dalam pembelajaran untuk melatihkan literasi digital siswa.
The Analysis of Low-Cost Pb(II) Adsorbents using Batch Method of Solid-Phase Spectrophotometry
Authors: Saputro Sulistyo , Ashadi Ashadi , Mahardiani Lina , Indriyanti Nurma Yunita , Kawedhar Maria Ciptaning Sabdo , Ajunda Wima Pudya
Published: November 2021

Heavy metal pollutants contained in wastewater can cause health problems for living things around. Minor to fatal health problems can occur due to heavy metal poisoning, mainly caused by Pb(II) metal.. This study aimed to determine the optimum mass combination of rice husk and zeolite to adsorb Pb(II) metal ions in simulated wastewater, and to determine the sensitivity of the analysis method. This study used Solid Phase Spectrophotometry (SPS) to determine the decrease in Pb(II) metal ion levels after being adsorbed by activated carbon from rice husks and zeolites. This study used an experimental method with simulated wastewater samples containing Pb(II) at several concentrations. Pb(II) adsorption processes by rice husk and natural zeolite used various adsorbents' mass ratios. The adsorbents were characterized by using Fourier-Transform Infra-Red (FTIR) Spectrophotometry. Pb(II) analysis during adsorption processes used a single beam UV-visible Spectrophotometer for Solid-Phase Spectrophotometry. This study indicates that the combination of adsorbent from rice husk and natural zeolite can properly adsorb Pb(II) ions with an adsorption capacity of 0.75 μg g-1 and 0.025 μg L-1 for the LoD of the instrument.
Synthesis and Characterization of Ag/TiO2 Nanoparticles using Mirabilis jalapa Plant Extract
Authors: Purnomo Frida Octavia , Ningrum Sari Sekar , Kautsari Sadwika Najmi
Published: November 2021

Green synthesized nanomaterials have been widely developed because of their less toxicity, low energy process, environmentally friendly, effective, cheap, and pollution-free. Green synthesis of silver doped titanium dioxide nanoparticles (Ag/TiO2 NPs) was carried out using Mirabilis jalapa plant extract. The plant extract was used as a reducing agent. The functional groups, morphology, and crystalline structure of as-synthesized Ag/TiO2 NPs were investigated by FT-IR, FESEM, and XRD. Analysis by FESEM confirmed that the morphology of Ag/TiO2 NPs is spherical with an average size of ~ 400 nm. Crystallite size for the Ag/TiO2 NPs was calculated by the Scherrer formula dan the average size found to be in the range of 15.72 nm. The result of XRD analysis showing the fcc structure for metallic silver and TiO2 particles in the anatase and rutile phases.
Hydroxyapatite (HAp) From Tenggiri Fish Bones As Abrasive Material In Toothpaste Formula
Authors: Anggresani Lia , Sari Yoli Nopita , Rahmadevi Rahmadevi
Published: November 2021

Cavities are one of the factors of dental and oral health problems that can be prevented by brushing teeth using toothpaste. Toothpaste can be made from a variety of chemicals, one of which is hydroxyapatite (HAp) which has good biocompatible properties. Hydroxyapatite can be obtained by utilizing tenggiri fish bone waste which has the main element of calcium. Fish bones soaked with NaOH and acetone are then calcined at 800 °C for 3 hours to obtain CaO powder and characterized its elemental content using X-Ray Fluorescence (XRF). CaO obtained was then reacted with (NH4)2HPO4 with a mole ratio of Ca/P 1.67 then heated at 90 °C, added NaOH up to pH 12, then the obtained deposits are filtered and calcined at 900 °C.  The solids obtained from the calcination are then characterized using X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). Hydroxyapatite (HAp) was formulated into toothpaste with the concentrations of 0% (F0), 45% (F1), 50% (F2), and 55% (F3). Toothpaste was evaluated using organoleptic tests, homogeneity tests, foam height tests, dispersability tests, pH and hedonic tests. XRD analysis shows that the resulting hydroxyapatite (HAp) has a crystal structure in accordance with ICSD standard No. 96-900-3549. SEM analysis showed that granular particles measuring 0.1 μm–0.3 μm in size. All formulated toothpastes (F0, F1, F2, and F3) meet the requirements of a good toothpaste.  Hydroxyapatite (HAp) can be formulated into a good toothpaste with a concentration of 45%.
Ergosterol Peroxide and Stigmasterol from The Stembark of Aglaia simplicifolia (Meliaceae) and Their Cytotoxic against HeLa Cervical Cancer Cell Lines
Authors: Kurniasih Nunung , Supriadin Asep , Harneti Desi , Abdulah Rizky , Taib Mohamad Nurul Azmi bin Mohamad , Supratman Unang
Published: November 2021

Two steroid compounds, ergosterol peroxide (1) and stigmasterol (2) have been isolated from the stembark of Aglaia simplicifolia belong to Meliaceae family. The chemical structures of 1 and 2 were identified based on spectroscopic evidence including UV, IR, 1D NMR, 2D NMR as well as mass spectra and by comparison with those previously reported spectra data. Both compounds were evaluated for their cytotoxic effects against cervical cancer HeLa cells in vitro. Compounds 1 and 2 showed cytotoxicity activity against HeLa cervical cancer cells with IC50 values of 0.80 and 26.42 µM, respectively.
Ligninase Profiling and Optimization of Laccase Production from Indigenous Wood Rot Fungus (WRF) KLUM2 in Kirk Medium-Alkali Lignin Kayu Jati (MK-ALKJ)
Authors: Mutmainah Siti , Susanti Evi
Published: November 2021

The production of ligninase by wood rot fungus (WRF) is determined by carbon source and growth condition. The goal of this study is to determine the ligninase profile produced by WRF KLUM2 in Kirk Medium using teak wood alkaline lignin as a carbon source known as Kirk Medium-Alkali lignin Kayu Jati (MK-ALKJ), optimization of dominant ligninase production in the MK-ALKJ compared to the one that is produced in the Kirk’s medium with glucose as a carbon source (MK-Glucose). This research was conducted in an experimental laboratory consisting of: (1) spore suspension preparation, (2) ligninase profiling at various growth times, (3) ligninase profiling at various temperature variations, (4) optimization of laccase production including pH and the amount of nitrogen source. Growth was identified based on the specific activity of lignin peroxidase (LiP), manganese peroxidase (MnP), and laccase. The results showed that relatively the three types of ligninase, namely LiP, MnP, and laccase, were produced in the same amount by the wood rotting fungus isolates KLUM2 in MK-ALJK. All three were produced with the highest yield of respectively 55.65; 52.48; 57.64 U/mg. Laccase as the dominant ligninase can be optimized to reach 83.52 U/mg by inoculating 2.107 spore cells in MK-ALKJ in 37 °C, pH = 3.5, and a nitrogen source of 20mM (NH4)2SO4 for 6 days. Therefore, it can be concluded that the ligninase activity of indigenous WRF KLUM2 in MK-ALJK medium is higher than in the MK-Glucose.
Reticular Dysgenesis: A Rare Immunodeficiency in a Neonate With Cytopenias and Bacterial Sepsis
Authors: Janardan Sanyukta K. , Pencheva Bojana , Ross Anthony , Karpen Heidi E. , Rytting Heather , Batsuli Glaivy
Published: November 2021

Severe combined immunodeficiency (SCID) consists of a group of disorders defined by abnormal B and T cell development that typically results in death within the first year of life if undiagnosed or untreated. Reticular dysgenesis (RD) is a rare but especially severe form of SCID that is caused by adenylate kinase 2 deficiency and is characterized not only by lymphopenia but also by profound neutropenia. RD predisposes patients to viral and fungal infections typical of SCID as well as serious bacterial infections atypical in the neonatal period in other SCID types. RD is also associated with sensorineural hearing loss not typically seen in other forms of SCID. Without rapid diagnosis and curative hematopoietic stem cell transplantation, RD is fatal within days to months due to overwhelming bacterial infection. The inclusion of the T cell receptor excision circle assay nationally in 2017 on the newborn screen has facilitated diagnosis of SCID in the neonatal period. This case reports on a male infant with RD who presented after preterm birth with severe cytopenias and a gastrointestinal anomaly and ultimately developed severe bacterial sepsis. Postmortem bone marrow evaluation and panel-based gene sequencing identifying 2 novel variants in the adenylate kinase 2 gene provided confirmation for a diagnosis of RD. This case emphasizes the importance of thorough diagnostic evaluation, including the newborn screen, in neonates and infants with persistent and unexplained cytopenias. Prompt hematology and/or immunology referral is advised for disease management and to facilitate hematopoietic stem cell transplantation to optimize long-term survival.
Single-Examination Risk Prediction of Severe Retinopathy of Prematurity
Authors: Coyner Aaron S. , Chen Jimmy S. , Singh Praveer , Schelonka Robert L. , Jordan Brian K. , McEvoy Cindy T. , Anderson Jamie E. , Chan R.V. Paul , Sonmez Kemal , Erdogmus Deniz , Chiang Michael F. , Kalpathy-Cramer Jayashree , Campbell J. Peter
Published: November 2021

BACKGROUND AND OBJECTIVES

Retinopathy of prematurity (ROP) is a leading cause of childhood blindness. Screening and treatment reduces this risk, but requires multiple examinations of infants, most of whom will not develop severe disease. Previous work has suggested that artificial intelligence may be able to detect incident severe disease (treatment-requiring retinopathy of prematurity [TR-ROP]) before clinical diagnosis. We aimed to build a risk model that combined artificial intelligence with clinical demographics to reduce the number of examinations without missing cases of TR-ROP.

METHODS

Infants undergoing routine ROP screening examinations (1579 total eyes, 190 with TR-ROP) were recruited from 8 North American study centers. A vascular severity score (VSS) was derived from retinal fundus images obtained at 32 to 33 weeks’ postmenstrual age. Seven ElasticNet logistic regression models were trained on all combinations of birth weight, gestational age, and VSS. The area under the precision-recall curve was used to identify the highest-performing model.

RESULTS

The gestational age + VSS model had the highest performance (mean ± SD area under the precision-recall curve: 0.35 ± 0.11). On 2 different test data sets (n = 444 and n = 132), sensitivity was 100% (positive predictive value: 28.1% and 22.6%) and specificity was 48.9% and 80.8% (negative predictive value: 100.0%).

CONCLUSIONS

Using a single examination, this model identified all infants who developed TR-ROP, on average, >1 month before diagnosis with moderate to high specificity. This approach could lead to earlier identification of incident severe ROP, reducing late diagnosis and treatment while simultaneously reducing the number of ROP examinations and unnecessary physiologic stress for low-risk infants.
Parenthood, Parental Benefits, and Career Goals Among Pediatric Residents: 2008 and 2019
Authors: Powell Weston T. , Dundon Kelly M.W. , Frintner Mary Pat , Kornfeind Katelin , Haftel Hilary M.
Published: November 2021

OBJECTIVES

Examine reported availability of parental benefits for pediatric residents and impact of parenthood on reported importance of characteristics of post-training positions and career goals in 2008 and 2019.

METHODS

We analyzed data from American Academy of Pediatrics surveys of graduating residents in 2008 and 2019 querying (1) parenthood, (2) benefits during residency, (3) importance of parental benefits and job characteristics in post-training position, and (4) subspecialty career goal. Logistic regression was used to estimate independent effects of gender, partner status, and parenthood via derived predicted values (PVs).

RESULTS

Of 1021 respondents, three-fourths were women. Respondents in 2019 were less likely than in 2008 to have children (24.5% vs 33.8%, P < .01). In 2019, respondents were less likely to report availability of maternity (PV = 78.5% vs 89.5%, P < .001) or parental leave (PV = 42.5% vs 59.2%, P < .001) and more likely to report availability of lactation space (PV = 77.8% vs 56.1%, P < .001.). Most residents reported control over work hours, family considerations, and number of overnight calls per month as essential or very important characteristics in post-training positions. Controlling for resident characteristics, parenthood was associated with importance of family considerations and overnight calls in post-training position. Parenthood did not associate with subspecialty career goals, but gender did.

CONCLUSIONS

Residents are less likely to report availability of parental benefits during residency training in 2019. Most residents, both those with children and those without, consider parent friendly characteristics important in post-training positions. Parenthood does not correlate with subspecialty career goals independent from gender.
Effects of acetic acid on efficiency of collagen extraction from jellyfish \(\textit{Rhopilema hispdium}\) (Vanhöffen, 1888)
Authors: Pham Thi Kha , Pham The Thu , Tran Manh Ha , Chu Van Thuoc , Le Ba Hoang Hiep
Published: November 2021

Collagen is an extremely important fibrous protein in the body. It is the main structural material of all tissues: Skin, bones, ligaments, tendons, cartilage. The source of traditional collagen production is mainly from the skin and bones of animals. However, marine animals are currently a promising alternative source of materials with low risk of disease transmission, no religious barriers to consumption, abundant raw materials, and high-efficiency extraction. In present study, the effects of several factors: Acetic acid concentration, the ratio of jellyfish and acetic acid solution (w:v), as well as the time of extraction on efficiency of collagen extraction process from jellyfish (Rhopilema hispidum Vanhoffen, 1888) were investigated. The results showed that the collagen which was extracted from jellyfish in 0.1M acetic acid, with the ratio 1:3 between the jellyfish and acetic acid solution (w:v) in 5-day extraction had high extraction efficiency. Extracted collagen in present study was mainly type I collagen, consisting of 3 polypeptide chains: β chain (~ 250 kDa), α1 chain (~ 40 kDa) and α2 chain (~ 100 kDa).
An initial study on ocean acidification in Southern waters of Vietnam
Authors: Le Hung Phu , Vo Tran Tuan Linh , Pham Hong Ngoc
Published: November 2021

Ocean acidification (OA) refers to the increase of dissolved CO2 and the reduction in the pH of seawater as a consequence of the absorption of large amounts of carbon dioxide (CO2) by the oceans. This process is the result of large quantities of CO2, produced by vehicles and industrial and agricultural activities. Over the past decades there have been many worldwide studies focusing on potential impacts of OA. However, researches regarding this issue remain scarce in Vietnam. In this paper, data of pH, total alkalinity (TA), dissolved inorganic carbon (HCO3-, CO32-, CO2), partial pressure of CO2 (pCO2) and the state of aragonite saturation (Ωar) measured in Southern waters of Vietnam in 2018 were used to: (1) Provide the initial data of OA parameters in Southern waters of Vietnam; (2) Compare the current situation of OA in Southern waters of Vietnam with the situation of world oceans. The results showed that mean values of pH, TA and CO32- concentrations were 8.04 (7.92–8.11), 2300.28 µmol/kgSW (2,144.10–2,523.15), 218.83 µmol/kgSW (151.32–262.83), respectively. These values were higher in offshore areas than in coastal areas, especially at the estuaries. The average value of pCO2 was 414.47 µatm (327.93–568.59), higher when compared with that of other areas (370 µatm). On the other hand, the state of aragonite saturation of the studied area had the similar patterns of TA and CO32- concentrations. Most of values were always greater than 3, with this saturation state, the marine calcifiers are more likely to survive and reproduce.
TECHNOLOGY INTEGRATION IN AN INDONESIAN EFL WRITING CLASSROOM
Authors: Mali Yustinus Calvin Gai , Salsbury Thomas Lee
Published: November 2021

The global, national, and local top-down technology-related policies and initiatives indicate the essential place of technology in education. However, little is known about classroom-based and self-reflective understandings of how the integration of technology can facilitate or distract students’ writing processes in the context of higher education in Indonesia, specifically from the eyes of English as a Foreign Language (EFL) writing lecturers in the country. In response, this qualitative study aims to delve closely into the lecturers’reflection of integrating technology to support their students in completing English language learning tasks in an EFL writing classroom. Data were gathered from three female writing lecturers. They completed four self-reflective checklists and were interviewed to clarify the checklists and their technological practices related to five stages of process writing, namely planning, drafting, editing, revising, and submitting. The analysis of the data indicated that the most successful experiences in using technology were in the planning stage. Meanwhile, technology applications in the drafting, editing, and revising phases were mainly used to submit work and provide feedback. Various technology applications used in the writing class, some issues in using the technology in the writing stages, and directions for further research are discussed.
PROMOTING PROFESSIONAL IDENTITY AMONG PRE-SERVICE ENGLISH TEACHERS THROUGH TEACHER CAMPS
Authors: Hidarto Anderson , Christine Chindy
Published: November 2021

With a mission to enhance the quality of EFL teachers, the Regional English Language Office (RELO) of the U.S. Embassy in Indonesia has conducted a pre-service teacher camp where practical teaching innovations are taught alongside reflective practices and the development of social and intercultural competences. This paper aims to examine how the participants, who are pre-service language teachers, perceived their professional identity as potential EFL educators after attending Camp EPIC and to what extent the program contributed to this process of professional identity formation. The study employed a mixed-methods survey where a total of 45 participants of Camp EPIC 2018 were purposively selected. They were asked to provide descriptions of themselves as teachers before and after the teacher camp, which were then analysed qualitatively using thematic analysis. As for the quantitative data, a set of thirty-three Likert-scale items were examined using Principal Component Analysis (PCA). The triangulated data indicated that the participants’ perception was positively altered after the camp. While some mentioned that they were more resourceful and creative with teaching ideas, others showed a higher level of self-efficacy concerning their competence. These changes could be attributed to four major features of the camp: reflection, feedback, resource exploitation, and collaboration.
Physical-motor indicators and specific skills of young basketball players after periodization training
Authors: de Assis Lauria André , Ribeiro Junior Dilson Borges , Bredt Sarah da Glória Teles , Werneck Francisco Zacaron
Published: November 2021

abstract Basketball is a team sport with short, high intensity movement patterns and rapid and frequent changes of direction. Strength, agility and speed, in addition to specific technical skills, are essential for basketball athletes to achieve good performance. This study aims to verify the effect of a traditional periodization on physical-motor indicators and on specific technical skills in young basketball players. Nineteen young basketball players (15.4 ± 1.3 years), with at least 12 months of training experience, underwent a 5-month periodization. We assessed two physical-motor indicators (countermovement jump (CMJ) and anaerobic capacity (Line Drill)) and two specific technical skills (Dribbling and Shooting) at the PRE and POST training moments. Paired Student's t test was used to test the effect of training on physical-motor variables and technical skills. We calculated the 95% confidence interval of the average relative gain (Δ%) for each variable and analyzed the effect size through Cohen's d (p≤ 0.05). Significant differences were found between the PRE and POST moments in the CMJ (34.02 vs. 38.64 cm; p <0.001), in the Line-Drill (33.20 vs. 31.73 s; p <0.001), Dribbling (6.95 vs. 6.66 s; p <0.001), and Shooting (15.84 vs. 17.95 pts; p <0.001). Young school-level basketball players submitted to a 5-month training period were able to improve their physical-motor indicators and specific skills.
Financeirização imobiliária em dois momentos: da produção à ocupação via proptechs
Authors: Kalinoski Rafael , Procopiuck Mario
Published: November 2021

Resumo Na última década, proliferaram modelos de negócios imobiliários globais substitutivos da tradicional relação proprietário-locador intermediada por empresas locais. O objetivo deste artigo é analisar como a produção imobiliária é transformada pelo capital financeiro sob a perspectiva dos produtos imobiliários direcionados a investidores com locação comercializada em plataformas digitais. Metodologicamente, a investigação qualitativa segue a “trilha do dinheiro” que financia as startups do setor imobiliário, conhecidas como proptechs, de modo a identificar os agentes financeiros envolvidos. Os resultados apontam que a financeirização imobiliária, além de continuar a ocorrer na construção e na incorporação, avança para a ocupação via empresas permeadas pelo mercado de capitais. Conclui-se que os negócios imobiliários se complexificam em quatro ondas: financeirização, financeiro-desburocratização, financeiro-virtualização e, por fim, financeiro-virtualização compartilhada da ocupação imobiliária.
Crise dentro da crise: a pandemia da violência de gênero
Authors: Malta Renata Barreto , Aneas Tatiana Güenaga , Lisboa Aline , Vieira Iasmim de Araujo
Published: November 2021

Resumo Este artigo se propõe a analisar como textos informativos publicados em sites brasileiros apresentam a violência de gênero no contexto da pandemia de Covid-19, partindo do pressuposto de que o isolamento social e suas consequências políticas e econômicas ampliam o processo de ameaça aos direitos das mulheres. Como método, optamos pela análise de conteúdo do corpus e a discussão dos resultados, embasadas em estudos de gênero e na teoria feminista. Os principais resultados apontam para a predominância de conteúdos jornalísticos e com diferentes linhas discursivas, mesmo que a violência doméstica seja central. A ausência de fontes advindas dos movimentos de mulheres e de uma discussão centrada nas causas da violência de gênero que questione a estrutura familiar e o lar como ambiente seguro para mulheres em confinamento é sintomática do atual cenário de retrocesso, ainda que a pandemia tenha dado visibilidade ao problema.
Os impactos da pandemia de Covid-19 para as mulheres imigrantes no Brasil: mobilidade e mercado de trabalho
Authors: Tonhati Tania Mara Passarelli , Macêdo Marília de
Published: November 2021

Resumo O presente artigo tem como objetivo apresentar os impactos da pandemia de Covid-19 nos fluxos migratórios de mulheres imigrantes para e no Brasil. Para isso, analisamos de forma comparativa, o período de janeiro a setembro de 2019 e 2020, tendo como alicerce as informações contidas nas bases de dados da Polícia Federal, sobre a chegada das imigrantes pelos postos de fronteiras (STI) e o registro migratório (SisMigra). Ademais, analisamos a inserção e a movimentação das trabalhadoras imigrantes no mercado de trabalho formal no Brasil, a partir da base de dados harmonizada Relação Anual de Informações Sociais (Rais), Carteira de Trabalho e Previdência Social (CTPS) e Cadastro Geral de Empregados e Desempregados (Caged), do Ministério da Economia, para o mesmo período. Os dados revelaram que, até o presente momento, a pandemia de Covid-19, tem contribuído para manter e acirrar os eixos de desigualdades (gênero, classe, grupo-étnico-racial e origem), que impactam o acesso das mulheres imigrantes a recursos.
Los docentes universitarios frente al cambio a la educación virtual impuesta por el coronavirus
Authors: Tejedor Santiago , Cervi Laura , Tusa Fernanda , Parola Alberto
Published: November 2021

Resumen Esta investigación realizó un estudio comparativo entre tres países muy impactados por el coronavirus a partir del análisis de las reflexiones de docentes sobre la enseñanza virtual universitaria durante la etapa de confinamiento. El estudio, de carácter descriptivo, exploratorio y explicativo, aplicó 196 encuestas, entre marzo y abril de 2020, a docentes de periodismo, comunicación y educación de la Universidad Autónoma de Barcelona (España), Universidad de Torino (Italia) y Universidad Técnica de Machala (Ecuador). Como resultado, los docentes, de forma mayoritaria, valoran negativamente el paso a la virtualidad, pues este se asocia, de forma recurrente, con un incremento del trabajo. Además, demandan competencias digitales básicas en los jóvenes universitarios y capacitaciones, de parte de sus instituciones, en el componente tecnológico y pedagógico-digital. A modo de conclusión, los docentes encuestados reconocen que es necesaria la promoción del pensamiento crítico y reflexivo vinculado a la gestión estratégica de las TIC.
Interpretações do Brasil e a temporalidade moderna: do sentimento de descompasso à crítica epistemológica
Authors: Tavolaro Sergio Barreira de Faria
Published: November 2021

Resumo Ao revisitar algumas das mais prestigiadas obras de interpretação do Brasil, o artigo debruça-se sobre o sentimento de descompasso que permeia os retratos da vida social brasileira ali delineados. A conjectura que se quer examinar é que, admitida a pluralidade de perspectivas que colorem essa fatura, tais obras insinuam primar no país um ordenamento temporal intricado e sinuoso, apenas em parte sincronizado ao tempo homogêneo, progressivo e linear dos contextos modernos modelares. Importa-me, ademais, contemplar um conjunto de formulações críticas ao imaginário sociológico com o propósito de explorar uma segunda hipótese: tão logo apreciados em diálogo com essas proposições críticas, retratos da sociedade brasileira esboçados nessas obras parecem dispor de elementos sugestivos de um enquadramento teórico sensível às incongruências, assimetrias e tensões que atravessam a temporalidade moderna. Ao final do artigo, pretendo refletir sobre o alcance heurístico dessas ideias e suas eventuais contribuições para o debate sociológico contemporâneo.
Processing of waste slag of non-ferrous metallurgy for the purpose of its complex utilization as a secondary mineral raw material
Authors: Kolesnikov A. S. , Serikbaev B. E. , Zolkin A. L. , Kenzhibaeva G. S. , Isaev G. I. , Botabaev N. E. , Shapalov Sh. K. , Kolesnikova O. G. , Iztleuov G. M. , Suigenbayeva A. Zh. , Kutzhanova A. N. , Asylbekova D. D. , Ashirbaev Kh. A. , Alchinbaeva O. Z. , Kolesnikova V. A.
Published: November 2021

This article provides an overview of the methods of processing slag from welting is given, different approaches and attempts of scientists from a number of countries aimed at processing such slags are considered. In the course of the review it was found that a huge number of the following methods and methods of processing from waelz slag, there is not a single option that has sufficient complexity of processing, and that at the moment are in the dumps toxins from waelz never found its use as a secondary raw material. The elemental chemical composition of the slag from welting, which is represented by compounds of calcium, silicon, iron, aluminum, carbon and heavy nonferrous metals in the form of zinc and lead, is determined. Thus, it is established that for many years, the slags from waelz that have not found their application and are in the dump at the moment continue to have a polluting effect on the environment. Ill. 1. Ref. 63.
Microstructure and properties of composite materials diamond‒silicon carbide
Authors: Shevchenko V. Ya. , Perevislov S. N.
Published: November 2021

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Cellular vibro pneumatic compacted corundum. Part 2. Features of physical and mechanical processes of vibration treatment of alumina-foam polystyrene mixtures
Authors: Sokov V. N.
Published: November 2021

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Detección de Leishmania spp. (Trypanosomatidae) e identificación de ingestas sanguíneas en flebotomíneos de un nuevo foco de leishmaniasis en el Caribe colombiano.
Authors: Alemán Santos Maira , Martínez-Pérez Lina , Rivero-Rodríguez Matilde , Cortés-Alemán Luis , Pérez-Doria Alveiro , Bejarano-Martínez Eduar
Published: November 2021

Introducción: Aunque la leishmaniasis visceral (LV) es endémica en el Caribe colombiano, en los últimos años se ha observado un incremento en su área de distribución, con el registro de casos en nuevas localidades. Objetivos: En este estudio se caracterizaron los flebotomíneos, parásitos del género Leishmania y algunos vertebrados domésticos asociados al primer caso humano de LV en la vereda Toro, San Juan Nepomuceno, Bolívar, Colombia. Metodología: Los insectos fueron sometidos a extracción, amplificación y secuenciación de ADN para establecer si estaban infectados con Leishmania spp. e identificar sus ingestas sanguíneas. Adicionalmente, en los caninos se determinaron los títulos de anticuerpos anti-Leishmania mediante la técnica de inmunofluorescencia indirecta. Resultados: En total se recolectaron 2178 flebotomíneos, el 99,6% de los cuales fue identificado como Lutzomyia evansi. Los parásitos Leishmania infantum y Leishmania braziliensis fueron detectados en esta especie, con una frecuencia mínima de infección de 0,003% (3/1070) y 0,0009% (1/1070), respectivamente. El 16,73% de las hembras de Lu. evansi se encontraron alimentadas de Homo sapiens sapiens, el 16,32% de  Capra hircus , el 12,45% de Sus scrofa domesticus, el 11,63 % de Bos indicus y el 9,79% de Canis familiaris. Uno de ocho caninos serológicamente evaluados fue positivo para leishmaniasis canina. Conclusión: El hallazgo en Lu. evansi de ingestas de sangre mixtas de humanos y caninos, evidencia el vínculo epidemiológico entre las Lutzomyia infectados con el parásito, los potenciales reservorios y la población humana, lo que explicaría la aparición del primer caso de LV en esta localidad del Caribe colombiano.
Preliminary Study on Minor Actinide Incineration in RSG-GAS without Isotope Separation
Authors: Dwijayanto R. Andika Putra , Alfarisie Muhammad
Published: November 2021

Minor actinides (MA) resulted from nuclear power plants is often considered as nuisance in spent fuel management due to its considerably long half-life. One of available strategies to deal with MA is to incinerate it, in order to reduce its radioactivity. This paper presents a study on MA incineration in RSG-GAS research reactor. Unlike previous study, this work did not separate the MA into individual isotopes, but incinerated as a whole. ORIGEN2.1 code is employed to calculate MA incineration within RSG-GAS core. MA composition used in this study consists of Np, Am, and Cm isotopes. The Central Irradiation Position (CIP) of RSG-GAS is loaded by 6 kg of MA and irradiated for two years. The result shows that about 1 kg of MA were incinerated after two years of irradiation, or 18,87% of the initial concentration. However, the increase of Cm-242 isotope, along with newly-formed Pu isotopes, were found to be significantly increasing short-term radioactivity compared to un-irradiated MA. Thus, two years-worth of MA incineration cannot be considered as effective, and other strategies must be pursued.
Effect of Collimator Elements on the Beam Spectrum and KERMA In Gamma Irradiator
Authors: Tursinah Rasito , Bunawas Bunawas , Cahyo Tri , Suherman Ade , Sukmabuana P
Published: November 2021

In the development of low-medium energy photon calibration facilities we have simulated several types of gamma irradiator collimator materials with ISO 4037-1 design connected to the output beam spectrum and the resulting kerma. Four types of collimator material, namely Al, Fe, Pb, and WCu have been simulated with gamma radiation sources 241Am, 57Co, 137Cs, and 60Co. Simulations were carried out using the Monte Carlo method with the PHITS computer program. Based on the comparison of air kerma produced, collimators made from Al are suitable for gamma sources 241Am, Fe material for gamma sources 57Co, and Pb material for sources 137Cs and 60Co.
Кто и как изучает пригороды крупных городов в современной России?
Authors: Анатолий Сергеевич Бреславский
Published: November 2021

В статье дается краткий обзор исследований пригородов в России до начала 2020 года. В начале автор дает краткую экспозицию предмета исследований и отмечает, что бурное развитие пригородов и урбанизация стороны одного процесса, хотя их темпы могут не совпадать. Отмечая специфику бурного роста пригородов на постсоветском пространстве («постсоциалистической пригородной революции»), вслед за восточноевропейскими коллегами он приводит пять обусловивших это причин: дерегуляция в релевантных городских сферах (управление, строительство, рынок недвижимости и т.д.), компенсация исторической нехватки жилья, деиндустриализация городов и инфраструктурный кризис центральных городских микрорайонов, массовые внутренние миграции в большие города и приход крупных инвестиций в пригородную недвижимость.

Далее автор обсуждает тематику и работы исследователей пригородов по дисциплинам и географическим регионам. Основными направлениями изучения субурбанизации являются популяционная и миграционная динамика пригородных территорий, многообразие дач, география пригородов. Отмечается, что поле только начинает складываться в России: ученых немного, немногочисленные исследовательские кейсы разбросаны по стране и не позволяют делать обобщения о состоянии пригородов в стране в целом, поэтому картина развития пригородов в общероссийском масштабе складывается преимущественно на материале демографических данных.
Изменение значения дачи в пригородно-городском пространстве (по материалам хабаровских СМИ 2010–2020 гг.)
Authors: Потапчук Елена Юрьевна
Published: November 2021

Статья посвящена трансформациям режимов использования дачи и ее функций на материале города Хабаровска. Дается краткий обзор истории дач в России и более детальный — в Хабаровске. Почти все дачи здесь расположены рядом с городом из-за неосвоенности и неудобства удаленных территорий. Популярность дач в Хабаровске исторически обусловлена сельскими корнями многих горожан и советским и постсоветским дефицитом продуктов питания, однако теперь они скорее убыточны. Большие дачные массивы расположены на островах Амура, поэтому в значительной степени речь идет о них. Их использование сопряжено с труднодоступностью, затратной дорогой, постоянным риском подтопления и в целом дорогим содержанием. Однако автор отмечает практически нерациональную, непрагматичную приверженность этим дачам. Сегодня в Хабаровске резоном содержания дачи является не столько экономическая выгода (плодоовощные культуры для себя или на продажу), сколько отдых, общение с семьей и друзьями, сохранение семейной традиции. Автор также отмечает процессы субурбанизации, характерные для страны в целом, в частности отток населения в пригороды на постоянное место жительства.
Урбанизация в Хакасии в постсоветский период: основные векторы развития
Authors: Тиникова Елена Евгеньевна
Published: November 2021

Статья посвящена развитию урбанизации в Хакасии в 1991–2017 годах. Автор анализирует динамику количественных показателей урбанизации и рассматривает факторы, оказавшие влияние на численность городского населения региона. На основе официальных статистических данных выявлены особенности развития урбанизационного процесса. Так, с 1989 по 2017 год городское население Хакасии сократилось на 9,7% на фоне среднероссийских 2,7%. Однако Хакасию практически не затронул общероссийский постсоветский процесс рурализации. Основным фактором снижения численности городского населения в этот период стало преобразование городских поселений в сельские: им было обусловлено 80% потерь городского населения. Другой существенный фактор — естественная убыль. Особое внимание уделено вопросу урбанизации хакасов и проблемам их адаптации в городе. В этот период растет доля хакасов в численности городского населения, при этом миграция из сел носит вынужденный характер из-за безработицы и низкого уровня жизни. Особенностью городской жизни хакасов является то, что стирание границ между хакасскими субэтносами в городе происходит значительно быстрее, чем в деревне. Также обсуждаются основные особенности и тренды эволюции системы городского расселения в республике.
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Published: November 2021

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Serum Uric Acid Levels in Hypertensive Patients Admitted to The Emergency Department
Authors: AKMAN Canan , BAKİRDOGEN Serkan
Published: November 2021

Objective: There is not enough information in the literature conducted about the importance of serum uric acid levels in hypertensive emergency patients. Our study aims to investigate the role of serum uric acid levels in patients admitted to the emergency department due to high blood pressure.
Materials and methods: Hypertensive emergency with acute target organ damage with blood pressure 180/110 mmHg and above (group I), hypertensive urgency patients without acute target organ damage with blood pressure of 180/110 mmHg and above (group II), and the patients with uncontrolled hypertension with systolic blood pressure between 140-180 mmHg and diastolic blood pressure between 90-110 mmHg (group III).
Results: One hundred twenty-four hypertensive patients (80 female, 44 male) were included. 33 patients (26.6%) were in group I, 19 (15.3%) in group II and 72 (58.1%) in group III. When compared in terms of serum uric acid level, it was found that there was a statistically significant difference between the groups (p = 0.001). The average serum uric acid level of patients in group I was higher compared to other groups (p <0.05).
Conclusion: Serum uric acid levels in patients admitted to the emergency department with high blood pressure may be important in distinguishing hypertensive emergency.
State and Evolution of the Investigación y Educación en Enfermería Journal from a Metric Analysis
Authors: Vélez Ramírez Manuela , Ochoa Gutiérrez Jaider , Suárez Tamayo Marcela
Published: November 2021

Objective. To analyze levels of production, reach, and thematic development of the Investigación y Educación en Enfermería journal from a scientometric analysis.

Methods. The study collected 1,066 articles corresponding to the period between 1983 and 2020. The scientometric analysis was carried out from three components of descriptive analysis: performance of the publication, geographic reach, and thematic development. The first two used data consolidated from articles published in the Open Journal System at Universidad de Antioquia. The third component captured the bibliographic references from the Web of Science and Scopus databases and from the Google Scholar and Lens academic search engines.

Results. In terms of the production analysis, the Journal shows stable behavior sustained over time with international reach regarding authorship. In the thematic setting, the Journal concentrates on two large clusters: 1) research on human factors from different perspectives and 2) cross-sectional studies differentiated mainly by sex. With respect to emerging clusters, on one side, a thematic pillar is seen with studies in young adult population and another in matters related to the educational process and nursing students.

Conclusion. The Journal has maintained outstanding behavior in terms of production over time, aligned with very good visibility for potential authors internationally; something not easily accomplished for most journals in Colombia. Likewise, its production has had a thematic domain to a greater extent related to human factors associated with the nursing practice.