bluuebunny/crossref_metadata_2025 huggingface dataset:
UNIVERSITETO STUDENTŲ GYVENSENOS YPATUMAI PANDEMIJOS METU: DARBO KOMPIUTERIU APLINKA IR FIZINIS AKTYVUMAS
Authors: Strukčinskaitė Vaiva , Strukčinskienė Birutė , Strazdienė Neringa , Griškonis Sigitas
Published: November 2021

COVID-19 pandemijos metu perėjimas prie nuotolinio mokymo(si) pakeitė universiteto studentų studijų aplinką ir veiklos pobūdį, pailgėjo darbo kompiuteriu laikas. Tuo laikotarpiu didėjo jaunų žmonių fizinis pasyvumas ir sė­dimos veiklos trukmė.

Darbo tikslas − tirti universiteto studentų gyvenseną, darbo kompiuteriu aplinką ir fizinio aktyvumo ypatumus pandemijos metu. Tyrimas atliktas 2020 m., Lietuvos aukštosiose universitetinėse mokyklose, po pirmosios pandemijos bangos. Apklausoje dalyvavo 201 studentas: 98 vaikinai (48,8%) ir 103 merginos (51,2%). Taikytas Chi kvadrato (χ2) testas. Duomenys laikyti statistiškai reikšmingais, kai p≤ 0,05. Tyrimas atskleidė, kad 50,2% visų tirtų jaunų žmonių prie kompiuterio praleido 6-10 valandų per dieną, 35,8% – 3-5 valandas per dieną ir 11,9% – daugiau kaip 10 valandų per dieną. Per parą kompiuteriu panašų laiko kiekį dirbo ir vaikinai, ir mer­ginos. 68,7% studentų naudojosi nepatogiomis kėdė­mis, 68,2% – skundėsi nepakankamu kompiuterinio stalo plotu, 65,7% – nepakankama darbo erdve. 22,9% res­pondentų naudojo kompiuterį esant labai geram apšvie­timui, 55,2% – esant geram, 21,4% – esant vidutiniam apšvietimui. Dirbantys kompiuteriu studentai patyrė truk­dymus: 40,8% respondentų trukdė kiti žmonės, 21,4% – triukšmas, 37,8% – buvo trukdomi dėl kitų priežasčių. Daugiau negu pusė apklaustųjų patyrė kaklo, pečių ir nugaros srities skausmus. 10,9% studentų savo fizinę sveikatą vertino kaip labai gerą, 49,3% – gerą, 33,8% – vidutinę ir 6% – blogą. Tik 32,8% studentų teigė, kad turi pakankamai žinių apie fizinės veiklos poveikį sveikatai. Nedidelė dalis tirtų studentų (11,9 proc.) nurodė, kad jie mankštinosi ar sportavo bent 30 minučių kasdien, o 24,9 proc. – mankštinosi bent 30 minučių 2-3 kartus per savaitę, 23,4 proc. – 1 kartą per savaitę. 62,2 proc. jaunų žmonių sutiko, kad jie turėtų būti fiziškai aktyvesni. 37,8 proc. jaunų žmonių dirbdami kompiuteriu reguliariai darė pertraukas. 68 proc. studentų mieliau sportuotų kartu su bendraamžiais ir draugais, o 19 proc. – su šeimos nariais.

Išvados. Pandemijos metu dauguma studentų prie kom­piuterio praleido daug valandų per dieną ir tik mažuma darė reguliarias pertraukas. Tirti jaunuoliai minėjo ne­tinkamą darbo įrangą ir darbo aplinką, dauguma kentė įvairių kūno vietų skausmus, nurodė, kad deda per mažai pastangų fiziniam aktyvumui ir fizinei veiklai didinti. Dauguma studentų norėtų mankštintis su bendraamžiais ir draugais. Tyrimo rezultatai parodė studentų sveikos gy­vensenos ugdymo, saugios ir sveikos darbo kompiuteriu aplinkos kūrimo ir fizinio aktyvumo skatinimo poreikį. Studentų informavimas apie fizinio aktyvumo poveikį sveikatai, jų motyvavimas būti fiziškai aktyvesniems ir patrauklesnės bei prieinamesnės fizinės veiklos organiza­vimas yra svarbūs veiksniai studentų sveikatai stiprinti.
PENERAPAN ALGORITMA K-NEAREST NEIGHBORS PADA KLASIFIKASI PENENTUAN GIZI BALITA (STUDI KASUS DI POSYANDU DESA BLUTO)
Authors: Wahyudi Rizal , Orisa Mira , Vendyansyah Nurlaily
Published: November 2021

Di Indonesia kekurangan gizi balita masih banyak di jumpai di berbagai daerah di Indonesia. Gizi merupakan faktor utama dari kualitas sumber daya manusia. Sangat diperlukan setiap orang tua jika ingin balita tumbuh kembang anak maksimal. Pada posyandu Di Desa Bluto proses pendataan dan penentuan status gizi balita di lakukan secara manual dengan mencatat pada buku. Maka perlu adanya sistem yang memadai untuk memproses penentuan gizi tersebut sehingga proses dapat berjalan dengan baik dan tepat.

Sistem yang dibuat menerapkan metode algoritma K-Nearest Neighbor untuk proses klasifikasi penentuan gizi balita dengan adanya sistem ini dapat membantu para petugas posyandu untuk mengolah data dan menentukan gizi balita apakah termasuk gizi baik, kurang gizi, gizi buruk, dan obesitas. Sistem ini dirancang dengan menggunakan bahasa pemrograman php dan phpMyadmin sebagai database sistem ini berbasi website.

Berdasarkan hasil pengujian semua fitur yang ada pada website berjalan dengan baik. Sistem dapat menentukan klasifikasi penentuan status gizi. Pada perhitungan yang telah dilakukan secara manual dengan Microsoft Excel hasil sesuai dengan hasil perhitungan yang ada pada Sistem website Klasifikasi status gizi. Bahwa metode K-Nearest Neighbor pada klasifikasi penentuan gizi balita dengan uji akurasi confusion matrix nilai klasifikasi Berdasarkan dari hasil pengujian akurasi terhadap nilai K = 3 dan K = 5 dapat di lihat nilai akurasi yang di peroleh terdapat perbedaan nilai akurasi. Berdasarkan uji coba yang dilakukan terhadap 25 data uji nilai akurasi K = 3 mempunyai akurasi 88% dan nilai K = 5 mempunyai nilai akurasi 84%. Nilai akurasi akan berkurang dengan bertambahnya nilai K. Di harapkan sistem ini dapat membantu para petugas posyandu dalam mengolah data dan menentukan status gizi.
PENERAPAN METODE K MEANS PADA SISTEM INFORMASI AKADEMIK UNTUK PENGELOMPOKKAN SISWA BERPRESTASI DI UPT SMA NEGERI 3 KOTA PASURUAN BERBASIS WEB
Authors: Prayoga Yudono , Mahmudi Ali , Zulfia Zahro' Hani
Published: November 2021

Pada dunia Pendidikan dituntut untuk memiliki kemampuan bersaing dengan memanfaatkan sumber daya yang sudah ada. Selain sumberdaya sarana, prasarana, dan juga manusia, sumber sistem informasi merupakan salah satu sumber daya yang dapat digunakan untuk meningkatkan kemampuan bersaing. Dikutip pada penelitian sebelumnya, Fitri Larasati Sibuea dan Andy Sapta tentang Pemetaan Siswa Berprestasi menggunakan Metode K Means Clustering, memiliki tujuan untuk memetakan siswa berprestasi. Sedangkan tujuan dari penelitian ini yaitu penerapan metode K Means clustering pada Sistem Informasi Akademik SMA 3 Pasuruan untuk pengelompokkan siswa berprestasi.

Metode K Means merupakan metode yang bertujuan untuk pengelompokkan yang berada di sekumpulan data yang diwakili oleh variabel K, dimana vareiabel K merupakan jumlah cluster yang akan ditentukan. Pada penelitian ini menggunakan 3 cluster yaitu siswa berprestasi, kurang berprestasi, dan tidak berprestasi.

Pada pengujian metode penelitian ini mendapatkan bahwa terdapat perbedaan antara perhitungan manual menggunakan software excell dengan perhitungan sistem sebesar 89% sesuai serta 11% tidak sesuai dengan kinerja sistem, dimana untuk pengujian browser yaitu pada Google Chrome 91.0.472.106 (official Build) (64), untuk Microsoft Edge 91.0.864.54 (Official Build) (64), dan Mozilla Firefox 89 dapat bekerja sesuai dengan yang diharapkan. Untuk pengujian pengguna sistem yang telah dilakukan dapat disimpulkan 25 orang yang terdapat pada kuisioner 84% memilih setuju, 12% memilih kurang setuju, 4% memilih tidak setuju.

Untuk kedepannya diharapkan aplikasi ini dapat digunakan di mobile sehingga dapat dipantau kapan saja dan dapat digunakan secara fleksible dimana dapat mengikuti cara penilaian yang baru serta dapat menampilkan bentuk diagram sebagai visualisasi data dari hasil pengujian yang telah dilakukan.
Eficacia y seguridad del acceso radial y femoral en pacientes con síndrome coronario agudo llevados a intervencionismo coronario
Authors: Tamayo Artunduaga Natalia , Vallejo Garcia Franco Javier , Senior Juan Manuel , Fernandez Cadavid Andres , Rodriguez Dimuro Arturo , Toro Escobar Juan Manuel
Published: November 2021

Introducción: el acceso transradial ha surgido como una alternativa atractiva a la vía femoral para realizar coronariografías e intervenciones coronarias. Describimos nuestra experiencia, y comparamos el acceso radial con una cohorte de acceso femoral en un periodo de tiempo.

Objetivo: identificar las complicaciones vasculares relacionadas con la coronariografía en pacientes de la unidad de dolor torácico de una institución de alta complejidad de la ciudad de Medellín. Materiales y métodos: estudio epidemiológico observacional, analítico, de una cohorte retrospectiva de pacientes mayores de 18 años que ingresaron a la unidad de dolor torácico del hospital Universitario San Vicente Fundación con diagnóstico de síndrome coronario agudo con y sin elevación del ST, y a los cuales se les realizó coronariografía por acceso radial y femoral.

Resultados: se evaluaron 675 pacientes, de los cuales 59.6% (n=402) se les realizó acceso femoral y 40.4% (n=273) acceso radial con diferencias, en relación al sexo y aspectos personales como el tabaquismo y la enfermedad renal crónica. Respecto a las complicaciones según el tipo de acceso, se hallaron diferencias significativas en la presencia de hematoma femoral (OR= 5.6; IC 95%: 1.28; 24.63) y el espasmo radial (p<0.05).

Conclusión: los accesos radial y femoral son seguros y efectivos, sin embargo la disminución significativa de las complicaciones vasculares puede ser una razón para preferir el acceso radial como técnica de elección en la mayoría de estos pacientes
Tromboprofilaxis en el paciente médico hospitalizado por medicina interna: Un estudio de corte transversal
Authors: Diaztagle Fernandez Juan José , Cely Javier Enrique , Sánchez Cantillo Jorge de Jesús , Sánchez Esquivel Fernando Antonio , Mendoza Olmos Elkin José
Published: November 2021

Introducción:

El tromboembolismo venoso es una de las principales causas de morbimortalidad prevenible seguida de una hospitalización. Las Heparinas han demostrado ser eficaces para su prevención, sin embargo se ha documentado la subutilización de estos fármacos, por lo que implementar medidas que garanticen la formulación adecuada es fundamental. En nuestra institución se han instaurado estrategias para mejorar la formulación de estos fármacos con resultados iniciales favorables, pero se desconoce el efecto a más largo plazo.

Métodos:

Estudio descriptivo, retrospectivo de corte transversal. Se evaluaron pacientes mayores de 18 años, hospitalizados por Medicina Interna entre junio y noviembre de 2012. Se estimó una muestra representativa de 102 pacientes. Se identificó la formulación de la tromboprofilaxis al segundo día de hospitalización, se determinó si fue adecuada según las guías institucionales y los errores en la prescripción de la misma. Se comparó los resultados con dos mediciones previas realizadas en la institución.

Resultados:

De los 102 pacientes evaluados, la tromboprofilaxis fue adecuada en 63 (61,8%) e inadecuada en 39 (38,2%). Las causas más frecuentes de error fueron: formulación en pacientes de bajo riesgo 18 (46,1%) y error por omisión en 12 (30,7%) pacientes. La formulación en pacientes con indicación y sin contraindicación disminuyó de 92% a 82% y en pacientes sin indicación aumentó de 50% a 56,2%, con relación a una medida previa realizada después de la difusión de guías institucionales.

Conclusiones:

La tromboprofilaxis en pacientes hospitalizados por medicina interna en nuestra institución se ordena en un alto porcentaje, sin embargo debe ser mejorada. El principal error es la formulación en pacientes con riesgo bajo. La implementación de estrategias para mejorar la tromboprofilaxis logró una mejoría inicial, pero tiende a disminuir con el tiempo. Se requiere un trabajo continuado de múltiples medidas que garanticen su impacto favorable a largo plazo.

Palabras claves: tromboprofilaxis, tromboembolismo venoso, heparinas, prevención, Adherencia
Comparison of wild and domesticated hot peppers fruit: volatile emissions, pungency and protein profiles
Authors: Comparini Diego , Taiti Cosimo , Lanza Matteo , Vita Federico , Pandolfi Camilla , Luti Simone , Spinelli F. , Pazzagli Luigia , Mancuso Stefano
Published: November 2021

Capsicum plant species are globally cultivated in warm and temperate regions, being important for agro-economic, biological and cultural aspects. While their worldwide spread and their ability of cross-pollination to easily hybridize play an important role in the formation of numerous species and varieties but also create confusion for their classification. For this reason, the categorization of species and varieties is complex and several methods have been used to evaluate pepper plant origin and evolution. Therefore, the objectives of this study were to compare a wild pepper (Capsicum chacoense) with other two domesticated cultivars belonging to different species such as Capsicum annuum and C. baccatum and draw conclusions about their origins using different approaches. For this purpose three methodologies have been used and compared: the comparison of their fruits volatile organic compounds (VOCs) emissions , their capsaicin and dihydrocapsaicin content and the leaves proteomic profiles. The VOCs analysis has been conducted by a time-of-flight mass spectrometry (ToF-MS) with an innovative approach to better identify all the compounds detected, in particular using two different ionization agents (H3O+ and NO+) to better identify all the compounds detected. The VOCs and pungency analyses were then used to build back propagation neural networks (BPNN) and a Random Tree classifier to conduct a multivariate analysis and evaluate the most species-specific volatiles. The outcomes appeared to be a most accurate approach with respect to the traditional varieties descriptors used for peppers discrimination. The BPNN led to the identification of several putative volatiles as good candidates for the recognition of these species or significant nodes in a decision learning tool. Finally, protein profiles have been obtained by SDS-PAGE analysis on the leaves to perform a fast proteomic comparison among the species. The protein profiles showed the C. baccatum and C. chacoense were more similar to the domesticated pepper C. annuum.
Stem and leaf anatomical and physiological characteristics of ‘Colín V-33’ avocado seedlings
Authors: Useche-Carrillo Nora Virginia , Barrientos-Priego Alejandro Facundo , Núñez-Colín Carlos Alberto , Campos-Rojas Eduardo , Ayala-Arreola Juan
Published: November 2021

The anatomical and physiological structure of the ‘Colín V-33’ avocado stem and leaf is described from samples from plants obtained from seed in order to identify genotypes and early selection parameters in a rootstock improvement program for avocado. Eighty-nine plants of 12 months of age were used, where a total of 25 anatomical variables of the stem, leaf, and physiological of leaf were evaluated. A cluster analysis was conducted that generated a hierarchical dendrogram that suggested six groups of plants. Furthermore, from the 25 variables, eight were selected as discriminant when performing a canonical discriminant analysis, the variables that most discriminated for the first canonical component were: stem diameter and density of xylem vessels, for the second: thickness of the stem epidermis, temperature of the stem leaf and stomata length, while for the third: thickness of the cambium, transpiration rate, and stomatal conductance. The genotypes showed a great variation between the groups, the characteristics of these indicated that the genotypes of Group 4 showed some that could be related to small or dwarf plants (smaller stem diameter, high density of xylem vessels, a higher rate of transpiration and stomatal conductance). In contrast to the genotypes of Group 3 which presented opposite characteristics in the previous variables, being able to associate with vigorous plants. The anatomical traits of the stem showed to be highly related to the behavior of the avocado plants. Associating genotypes with physiological and anatomical variables in leaf and stem can have great value for the selection of rootstocks at an early stage of development.
Single and combined effects of Bacillus spp. and brown seaweed (Sargassum vulgare) extracts as bio-stimulants of eggplant (Solanum melongena L.) growth
Authors: AYDI BEN ABDALLAH Rania , Ammar Nawaim , Ayed Fakher , Jabnoun-Khiareddine Hayfa , Daami-Remadi Mejda
Published: November 2021

Bacillus subtilis SV41, B. amyloliquefaciens subsp. plantarum SV65 and Sargassum vulgare extracts were evaluated for their plant growth-promoting potential on eggplant (Solanum melongena L.) plants. Bio-treatments applied singly and/or in combination were further compared to a compost tea and to a commercial bio-fertilizer (Acadian™). Results clearly showed that the combined treatments based on the two Bacillus spp. strains and the aqueous algal extract and the last one mixed with B. amyloliquefaciens subsp. plantarum SV65 induced the highest enhancements in the plant height and the maximum root length which were estimated at 32.4-33.9%, 23.9-25.5% and 23.4-25% and at 36.8-41%, 32.9-37.4% and 36.3-40.5% compared to water, compost tea and Acadian™ based treatments, respectively. Furthermore, the combined treatment based on the aqueous algal extract and B. amyloliquefaciens subsp. plantarum SV65 had significantly improved eggplant growth where the recorded increments in the stem diameter, the aerial part fresh weight, and the root fresh weight varied from 17.5 to 24.6%, 38.4 to 46.1%, and 32.3 to 50% as compared to the three controls, respectively. As for single treatments tested, the aqueous extract had induced a significant improvement in the major growth parameters measured. Developed bio-stimulant was found to be more effective than compost tea and commercial bio-fertilizer based treatments.
Characterization of Temperature and Productive Torque for 160l Frame Squirrel Cage Induction Motor
Authors:   Department of Electrical Engineering, Ramaiah University of Applied Sciences, INDIA., B Sudha. , Vadde Anusha ,   Department of Electrical Engineering, Ramaiah University of Applied Sciences, INDIA., Manickavasagam Krishnan ,   Department of Electrical Engineering, Ramaiah University of Applied Sciences, INDIA., Kadambi Govind R ,   Department of Electrical Engineering, Ramaiah University of Applied Sciences, INDIA.
Published: November 2021

Induction motor usage is increasing drastically due to new entrant of electric vehicle, traction and propulsion systems at present. Temperature of electric motors are significantly affect its parameters. Since, resistances variation of stator and rotor winding are depend on temperature, the torque speed characteristics also affects in the induction motors. In this paper, a innovative approach is proposed to arrive the relation of temperature on torque. Thermal analysis of 160 L-frame induction motors is carried out using Finite Element Method (FEM) under various load to obtain temperature. The mathematical relationship between temperature and torque is arrived using curve fitting technique. The expression arrived in this method is used to predict the torque for a given temperature of SCIM.
Effect of MoS2 as a Buffer Layer on CdTe Photovoltaic Cell Through Numerical Simulation
Authors:   Department of Electrical & Electronics Engineering, National Institute of Technology Delhi, New Delhi, India, Singh Nitesh Kumar , Agarwal Anshul ,   Department of Electrical & Electronics Engineering, National Institute of Technology Delhi, New Delhi, India, Kanumuri Tirupathiraju ,   Department of Electrical & Electronics Engineering, National Institute of Technology Delhi, New Delhi, India
Published: November 2021

A thin film based Cadmium Telluride photovoltaic cell is becoming highly competitive in the electric power industry. The major problem with the CdTe photovoltaic cell is the large barrier height behind the rear contact surface that prevents the solar cell to reach notional efficiency of 32%. A buffer layer is added to get a better result in terms of efficiency by reducing the valence barrier height at the rear contact surface of the CdTe photovoltaic cell. This manuscript presents the numerical simulation and optimization of ITO/TiO2/CdS/CdTe/MoS2/Au original photovoltaic cell structure using SCAPS 1D software. Furthermore, the effect of CdTe thickness, defect density, and acceptor density of MoS2 layer is discussed. Simulation results show that with the optimization of layer and parameters of the photovoltaic cell, efficacy of the p hotovoltaic cell is quite improved. With optimized solar cell, efficiency is improved to 26.49%, Voc = 1.141 V, Jsc = 27.690 mA/cm2, FF = 83.80% as compared to basic CdTe model which has an efficiency of 21.69%.
Design Concept of a Model Can-sized Sub-orbital Satellite
Authors:   Department of Mechanical Engineering, Delhi Technological University, New Delhi, India, Pradhan Ekansh , Dadheech Aman ,   Department of Mechanical Engineering, Delhi Technological University, New Delhi, India, Agarwal Himanshu ,   Department of Mechanical Engineering, Delhi Technological University, New Delhi, India, Singh Taruna ,   Department of Design, Delhi Technological University, New Delhi,, India, Singari Ranganath M. ,   Department of Design, Delhi Technological University, New Delhi,, India
Published: November 2021

Advancements in technology in the fields of satellite and aerospace systems and the need for smaller yet efficient designs have paved the way for further research into nano and pico-satellites. Smaller systems can prove to be more economical in investigating and measuring various parameters of the atmosphere in a localized area. This paper aims to demonstrate the design of one such system. A can-sized satellite (CanSat) has been designed with respect to the restrictions imposed by the CanSat Competition 2020. The design is developed in a way that allows it to be lightweight without compromising structural integrity. The manufacturing technique aimed to be used is 3D printing using Polylactic Acid (PLA) which allows for greater flexibility in customization and ease of fabrication. The application areas of the model satellite range from space exploration to weather forecasting.
Optimization of Process Parameters of Pin on Disc Wear Set up for 3D Printed Specimens
Authors:   Department of Mechanical Engineering, National Institute of Technology Delhi,India, Kumar Harish , Sharma Anuj ,   Centre for Advanced Studies, Dr. A P J Abdul Kalam Technical University (CAS-AKTU), Lucknow, India, Shrivastava Yogesh ,   Department of Mechanical Engineering, Galgotias College of Engineering and Technology, Gautam Budh Nagar, India, Khan Shahroz Akhtar ,   Department of Mechanical Engineering, Galgotias College of Engineering and Technology, Gautam Budh Nagar, India, Arora Pawan Kumar ,   Department of Mechanical Engineering, Galgotias College of Engineering and Technology, Gautam Budh Nagar, India
Published: November 2021

3D Printing is av technology that produces three-dimensional parts layer by layer from a material. The method relies on a digital data file being transmitted to a machine that then builds the component. The evolution of 3D printing has seen rapid growth in the manufacturing industry. However, the material properties of the fabricated part are different for different combinations of input parameters. Hence, it is essential to determine the properties of the fabricated specimen. In the present work, specimens of ABS have been fabricated using a 3D printer conform to ASTM G99 standard, by varying the combinations of input parameters. The design of experiments has been done using Box Behnken design. Thereafter, the wear rate of the fabricated specimens has been tested on the wear tester machine (Pin-on-disc). The obtained combination of input and output has been used to generate a mathematical model using response surface methodology (RSM). The model has been optimized and a suitable range of input parameters have been determined, pertaining to the minimum wear rate for given conditions.
Customer Satisfaction and Repurchase Decision: Evidence from Fast Food Restaurants
Authors:   Department of Business Administration & Marketing, Faculty of Management Sciences, Delta State University, Abraka. P.M.B. 95074, Asaba. Delta State, Nigeria, Inoni Oghenenyerhovwo
Published: November 2021

Service quality is a major determinant of customer satisfaction and consequently a repurchase decision in the fast food restaurants’ (FFRs) industry. Nevertheless, prompt and efficient services alone may not guarantee a restaurant a place in today’s hyper- competitive marketplace. Therefore, this study was conceived to examine the impact of food quality (FQ), service quality (SQ), perceived value (PV) and restaurant environment (RE) on customer re-purchase decision, mediated by customer satisfaction (CS). Data for the study were obtained from a sample of 320 consumers drawn from 12 FFRs in three major towns in Delta State, Nigeria. Multiple and hierarchical regressions were used to analyse the data generated. The findings indicated that FQ, SQ, PV and RE exerted positive and significant effects on CS and re-purchase decision. The results also showed that CS fully mediated the relationship between SQ and repurchase decision, but the meditational influence was only partially for FQ, PV and RE; implying that FQ, PV and RE have their own direct influence on RPD besides through SQ. Given the impact of FQ, SQ, PV and RE on CS and repurchase decision, restaurants’ managers need to continually improve on the quality of their services, environment and offerings to sustain the patronage of their clients in order to survive in today’s hyper-competitive marketplace.
A Professora Daura Santiago Rangel: Mamãe Daura
Authors: Maurício Macena Marta Maria
Published: November 2021

Este artigo se constitui de um recorte da tese de Marta Maria Maurício Macena que conta, em meio ao relato de doze professores, sobre uma educadora que foi destaque no Liceu Paraibano na década de 1960, D. Daura. Nove depoimentos nessa mesma tese, sem serem estimulados, trazem enfáticas afirmações a respeito dela. Ali no Liceu Paraibano, com apenas o Curso Normal (formação de segundo grau que habilitava para lecionar no ensino fundamental), foi professora de matemática na segunda fase do curso secundário (no Brasil, atual Ensino Médio) e em seguida, diretora dessa instituição, bem como do Instituto de Professores da Paraíba. Carismática para com alunos, servidores e professores, seu mandato, com características bem específicas, foi denominado de “Era Daura”.
HYDRAULIC MACHINES FOR SEPARATION OF WET DISPERSED SYSTEMS
Authors: Sevostianov Ivan , Kraevsky Sergiy , Sevostianov Vasyl
Published: November 2021

Separation processes of wet dispersed systems are quite common in the food, processing and other industries. In particular, these include processes related to the production of fruit and vegetable juices, jams, sunflower and olive oil, the extraction of fat from meat rinds in meat production, the separation of whey from cheese mass in the production of cheese, the separation of grated cocoa into butter and pulp, dehydration of wet dispersed waste of food production (alcohol grain, beer pellets, beet pulp, coffee and barley sludge). These processes are quite energy-intensive and have low-productivity, therefore, much attention is paid for modernization of equipment for their implementation in the direction of improving the indicated efficiency characteristics, as well as increasing reliability and reducing material consumption, complexity and price of working machines. At the same time, the known hydraulic static presses do not provide of low final moisture content of the product and the required productivity of the working process. Vibratory pressing equipment is often quite complex, unreliable and generates intense noise and vibration during of operation. Screw presses with an electromechanical drive, despite of their advantages, do not allow to achieve of the necessary degree of separation of the components of the dispersed system, in addition, their actuators are structurally quite complex and wear out quickly. The authors propose improved schemes of hydraulic presses for separation of wet dispersed systems, which can provide high rates of efficiency of the working process and have a simple and reliable design. The article also presents equations for calculating of the main operating parameters of the proposed equipment.
ДУХОВНІСТЬ У «КОЛЕСІ ЖИТТЄВОГО БАЛАНСУ» СУЧАСНОЇ ЛЮДИНИ
Authors: Saukh Petro , Saukh Iryna
Published: November 2021

Здійснено аналіз однієї із глобальних проблем сучасності — кризи духовності. Показано, що духовність сучасної людини серед інших життєвих цінностей (сім’я, кар’єра, гроші, здоров’я, дружба, любов, дозвілля) у контексті «колеса життєвого балансу» Пола Дж. Майєра займає малопомітне місце. Доведено, що цей факт є лакмусовим папірцем дисгармонії життя сучасної людини. Руйнація ціннісних імперативів духовної основи неминуче призводить до кризи, і це стосується як окремої людини, так і суспільства загалом. У зв’язку з цим розкрито можливі наслідки духовного спустошення і шляхи запобігання йому на основі реалізації ідей «нового гуманізму».
Russian as a native language in the post-Soviet space in comparison with the results of the 1989 census
Authors: Manakov Andrei
Published: November 2021

In the post-Soviet period, there was a significant narrowing of the Russian language distribution space. The aim of the study is to identify the changes that have taken place since the collapse of the Soviet Union at the level of the post-Soviet countries in the number and proportion of people who named Russian their native language. The novelty of this study is based on the level of regions in the post-Soviet space and the analysis of the dynamics of such indicators as to the share of the non-Russian population, who named Russian their native language. Almost all post-Soviet states experienced a decrease in the number and share of the Russian-speaking population. Currently, the minimum indicators of the proportion of Russians and Russian-speaking people are characterized by the states of Transcaucasia, as well as Tajikistan, Uzbekistan, and Turkmenistan. The biggest losses in the post-Soviet period of both the Russian and Russian-speaking population, in relative terms, were experienced by Kazakhstan and Kyrgyzstan. A special dynamics of these indicators have developed in two states — in the Republic of Belarus and Ukraine. In these countries, the part of the biethnic population that adopted the identity of the titular ethnic group retained the Russian language. Russian, for example, has declined more rapidly in Ukraine than in the categories of people who consider Russian as their native language, and this has led to a decline in the number and share of the Russian population. The situation in the Republic of Belarus, which is unique in the post-Soviet space, was the result of the 1995 referendum that established the status of the state language for Russian. As a result, along with the decrease in the Russian population in the Republic of Belarus, there has been a significant increase in the category of citizens who named Russian their native language.
Gaia GraL: Gaia DR2 Gravitational Lens Systems. VI. Spectroscopic Confirmation and Modeling of Quadruply Imaged Lensed Quasars
Authors: Stern D. , Djorgovski S. G. , Krone-Martins A. , Sluse D. , Delchambre L. , Ducourant C. , Teixeira R. , Surdej J. , Boehm C. , den Brok J. , Dobie D. , Drake A. , Galluccio L. , Graham M. J. , Jalan P. , Klüter J. , Le Campion J.-F. , Mahabal A. , Mignard F. , Murphy T. , Nierenberg A. , Scarano Jr. S. , Simon J. , Slezak E. , Spindola-Duarte C. , Wambsganss J.
Published: November 2021

Combining the exquisite angular resolution of Gaia with optical light curves and WISE photometry, the Gaia Gravitational Lenses group (GraL) uses machine-learning techniques to identify candidate strongly lensed quasars, and has confirmed over two dozen new strongly lensed quasars from the Gaia Data Release 2. This paper reports on the 12 quadruply imaged quasars identified by this effort to date, which is a ∼20% increase in the total number of confirmed quadruply imaged quasars. We discuss the candidate selection, spectroscopic follow-up, and lens modeling. We also report our spectroscopic failures as an aid for future investigations.
Establishing α Oph as a Prototype Rotator: Precision Orbit with New Keck, CHARA, and RV Observations
Authors: Gardner Tyler , Monnier John D. , Fekel Francis C. , Williamson Michael , Baron Fabien , Hinkley Sasha , Ireland Michael , Kraus Adam L. , Kraus Stefan , Roettenbacher Rachael M. , Schaefer Gail , Sturmann Judit , Sturmann Laszlo , ten Brummelaar Theo
Published: November 2021

Alpha Ophiuchi (Rasalhague) is a nearby rapidly rotating A5IV star that has been imaged by infrared interferometry. α Oph is also part of a known binary system, with a companion semimajor axis of ∼430 mas and a high eccentricity of 0.92. The binary companion provides the unique opportunity to measure the dynamical mass to compare with the results of rapid rotator evolution models. The lack of data near periastron passage limited the precision of mass measurements in previous work. We add new interferometric data from the MIRC combiner at the CHARA Array as well as new Keck adaptive optics imaging data with NIRC2, including epochs taken near periastron passage. We also obtained new radial velocities of both components at Fairborn Observatory. Our updated combined orbit for the system drastically reduces the errors of the orbital elements and allows for precise measurement of the primary star mass at the few percent level. Our resulting primary star mass of 2.20 ± 0.06 M
⊙ agrees well with predictions from imaging results and matches evolution models with rotation when plotting on a Hertzsprung–Russell diagram. However, to truly distinguish between nonrotating and rotating evolution models for this system, we need ∼1% errors on mass, which might be achieved once the distance is known to higher precision in future Gaia releases. We find that the secondary mass of 0.824 ± 0.023 M
⊙ is slightly underluminous when compared to stellar evolution models. We show that α Oph is a useful reference source for programs that need ±1 mas astrometry.
MCMC-based Voigt Profile Fitting to a Mini-BAL System in the Quasar UM 675*

†
Authors: Ishita Dai , Misawa Toru , Itoh Daisuke , Charlton Jane C. , Eracleous Michael
Published: November 2021

We introduce a Bayesian approach coupled with a Markov Chain Monte Carlo method and the maximum-likelihood statistic for fitting the profiles of narrow absorption lines (NALs) in quasar spectra. This method also incorporates the overlap between different absorbers. We illustrate and test this method by fitting models to a “mini-broad” (mini-BAL) and six NAL profiles in four spectra of the quasar UM 675 taken over a rest-frame interval of 4.24 yr. Our fitting results are consistent with past results for the mini-BAL system in this quasar by Hamann et al. We also measure covering factors (C
f) for two narrow components in the C iv and N v mini-BALs and their overlap covering factor with the broad component. We find that C
f (N v) is always larger than C
f (C iv) for the broad component, while the opposite is true for the narrow components in the mini-BAL system. This could be explained if the broad and narrow components originated in gas at different radial distances, but it seems more likely to be due to being produced by gas at the same distance but with different gas densities (i.e., ionization states). The variability detected only in the broad absorption component in the mini-BAL system is probably due to gas motion, since both C
f (C iv) and C
f (N v) vary. We determine for the first time that multiple absorbing clouds (i.e., a broad and two narrow components) overlap along our line of sight. We conclude that the new method improves fitting results considerably compared to previous methods.
Electron Density Dependence of Extreme Ultraviolet Line Intensity Ratios in Ar XIV
Authors: Nakamura Nobuyuki , Numadate Naoki , Kono Yasutaka , Murakami Izumi , Kato Daiji , Sakaue Hiroyuki A. , Hara Hirohisa
Published: November 2021

We report the electron density dependence of extreme ultraviolet line intensity ratios in Ar xiv studied using a well-defined electron beam ion trap plasma. The purpose of this study is to examine the potential of the Ar xiv lines in diagnosing the electron density of solar corona active regions with a temperature higher than 3 MK. The experimentally obtained dependence is in good agreement with collisional-radiative model calculations, which ensures the usability of the Ar xiv lines.
Three-dimensional Core-collapse Supernova Simulations with 160 Isotopic Species Evolved to Shock Breakout
Authors: Sandoval Michael A. , Hix W. Raphael , Messer O. E. Bronson , Lentz Eric J. , Harris J. Austin
Published: November 2021

We present three-dimensional simulations of core-collapse supernovae using the FLASH code that follow the progression of the explosion to the stellar surface, starting from neutrino radiation hydrodynamic simulations of the neutrino-driven phase performed with the Chimera code. We consider a 9.6 M
☉ zero-metallicity progenitor starting from both 2D and 3D Chimera models and a 10 M
☉ solar-metallicity progenitor starting from a 2D Chimera model, all simulated until shock breakout in 3D while tracking 160 nuclear species. The relative velocity difference between the supernova shock and the metal-rich Rayleigh–Taylor (R-T) “bullets” determines how the metal-rich ejecta evolves as it propagates through the density profile of the progenitor and dictates the final morphology of the explosion. We find maximum 56Ni velocities of ∼1950 and ∼1750 km s−1 at shock breakout from 2D and 3D 9.6 M
☉
Chimera models, respectively, due to the bullets’ ability to penetrate the He/H shell. When mapping from 2D, we find that the development of higher-velocity structures is suppressed when the 2D Chimera model and 3D FLASH model meshes are aligned. The development of faster-growing spherical-bubble structures, as opposed to the slower-growing toroidal structure imposed by axisymmetry, allows for interaction of the bullets with the shock and seeds further R-T instabilities at the He/H interface. We see similar effects in the 10 M
☉ model, which achieves maximum 56Ni velocities of ∼2500 km s−1 at shock breakout.
Simultaneous Estimation of Large-scale Structure and Milky Way Dust Extinction from Galaxy Surveys
Authors: Bravo Matías , Gawiser Eric , Padilla Nelson D. , DeRose Joseph , Wechsler Risa H. ,   The LSST Dark Energy Science Collaboration
Published: November 2021

The high cosmological precision offered by the next generation of galaxy surveys hinges on improved corrections for Galactic dust extinction. We explore the possibility of estimating both the dust extinction and large-scale structure from a single photometric galaxy survey, making use of the predictable manner in which Milky Way dust affects the measured brightness and colors of galaxies in a given sky location in several redshift bins. To test our method, we use a synthetic catalog from a cosmological simulation designed to model the Vera C. Rubin Observatory Legacy Survey of Space and Time. At high Galactic latitude (∣b∣ ≳ 20°) and a resolution of 1° (

7
′

), we predict the uncertainty in the measurement of dust extinction, E(B − V), to be 0.005 mag (0.015 mag). This is similar to the uncertainty of existing dust maps, illustrating the feasibility of our method. Simultaneous estimation of large-scale structure is predicted to recover the galaxy overdensity δ with a precision of ∼0.01 (∼0.05) at 1° (

7
′

) resolution. We also introduce a Bayesian formalism that combines prior information from existing dust maps with the likelihood of Galactic dust extinction determined from the excursion of observed galaxy properties.
Transport of Interstellar Neutral Helium throughout the Heliosphere
Authors: Fraternale Federico , Pogorelov Nikolai V. , Heerikhuisen Jacob
Published: November 2021

A number of physical processes accompanying the solar wind interaction with the local interstellar medium (LISM) are governed by charge exchange between ions and neutral atoms of interstellar origin. A new, 3D, MHD-plasma/kinetic-neutral model is developed that self-consistently includes both neutral hydrogen and helium atoms, and their feedback on the plasma, through charge exchange and photoionization. Focusing on the transport of interstellar neutral helium, quantitative estimates are provided for bulk properties, deflection angles, and velocity distribution functions (VDFs) along the upwind direction. It is shown that the average deflection of secondary He atoms born in the outer heliosheath (OHS) from their original direction in the LISM is ∼12° in front of the heliopause, and occurs in the directions parallel to the plane formed by the velocity and magnetic field vectors in the unperturbed LISM. While these properties are consistent with Interstellar Boundary Explorer observations of the “warm breeze,” we show that charge exchange in the OHS leads to remarkable deviations of their VDF from the Maxwellian distribution. He atom filtration in the OHS results in a significant temperature anisotropy and VDF asymmetries, even for the primary helium atoms that experience no charge exchange at all. This is an entirely kinetic phenomenon that shows that primary He atoms observed at 1 au have distributions substantially different from those in the LISM.
Rapid Evolution of Bald Patches in a Major Solar Eruption
Authors: Lee Jonathan H. , Sun (孙旭东) Xudong , Kazachenko Maria D.
Published: November 2021

A bald patch (BP) is a magnetic topological feature where U-shaped field lines turn tangent to the photosphere. Field lines threading the BP trace a separatrix surface where reconnection preferentially occurs. Here we study the evolution of multiple, strong-field BPs in AR 12673 during the most intense, X9.3 flare of solar cycle 24. The central BP, located between the initial flare ribbons, largely “disintegrated” within 35 minutes. The more remote, southern BP survived. The disintegration manifested as a 9° rotation of the median shear angle; the perpendicular component of the horizontal field (with respect to the polarity inversion line) changed sign. The parallel component exhibited a step-wise, permanent increase of 1 kG, consistent with previous observations of the flare-related “magnetic imprint.” The observations suggest that magnetic reconnection during a major eruption may involve entire BP separatrices, leading to a change of magnetic topology from BPs to sheared arcades.
A High-velocity Scatterer Revealed in the Thinning Ejecta of a Type II Supernova
Authors: Leonard Douglas C. , Dessart Luc , Hillier D. John , Pignata Giuliano , Williams G. Grant , Hoffman Jennifer L. , Milne Peter , Smith Nathan , Smith Paul S. , Khandrika Harish G.
Published: November 2021

We present deep, nebular-phase spectropolarimetry of the Type II-P/L SN 2013ej, obtained 167 days after explosion with the European Southern Observatory’s Very Large Telescope. The polarized flux spectrum appears as a nearly perfect (92% correlation), redshifted (by ∼4000 km s−1) replica of the total flux spectrum. Such a striking correspondence has never been observed before in nebular-phase supernova spectropolarimetry, although data capable of revealing it have heretofore been only rarely obtained. Through comparison with 2D polarized radiative transfer simulations of stellar explosions, we demonstrate that localized ionization produced by the decay of a high-velocity, spatially confined clump of radioactive 56Ni—synthesized by and launched as part of the explosion with final radial velocity exceeding 4500 km s−1—can reproduce the observations through enhanced electron scattering. Additional data taken earlier in the nebular phase (day 134) yield a similarly strong correlation (84%) and redshift, whereas photospheric-phase epochs that sample days 8 through 97 do not. This suggests that the primary polarization signatures of the high-velocity scattering source only come to dominate once the thick, initially opaque hydrogen envelope has turned sufficiently transparent. This detection in an otherwise fairly typical core-collapse supernova adds to the growing body of evidence supporting strong asymmetries across nature’s most common types of stellar explosions, and establishes the power of polarized flux—and the specific information encoded by it in line photons at nebular epochs—as a vital tool in such investigations going forward.
Stunting Prevention with Education and Nutrition in Pregnant Women: A Review of Literature
Authors: Sukmawati Sukmawati , Hermayanti Yanti , Fadlyana Eddy , Mediani Henny Suzana
Published: November 2021

Background : Stunting is a major nutritional problem in children under five years old which has an impact on slowing growth by reducing the number and development of body cells, including brain cells and other organs. Pregnant women are one of the groups who are vulnerable to nutritional problems, related to the process of growth and development of the fetus in the womb. The role of education and nutrition is important during pregnancy because it has implications for the health of mothers and children in later life. The aimed of this review was to identify research about effect stunting prevention and education and nutrition to pregnant women.
Methods : A database review undertaken using Pubmed, CHINAHL and Google Scholar from 2011-2021 to collect focused study on education and nutrition research on pregnant women to prevent stunting. A total of 1788 articles were identified. These were scaned and 18 articles were retrieved with 13 articles shortlisted for to in depth review.
Results : Education with using audiovisual media, moringa leaf ice cream and early nutrition has proved effective in increasing pregnant women knowledge regarding stunting prevention. Providing nutritional supplements/nutrients for moringa oliefera, folic acid and iron, specific nutrition, LNS, PM2A PROCOMIDA, nutrition before pregnancy, supplements antenatal iron and folic acid, prenatal micronutrients have an effect on reducing children stunting.
Conclusion: Audio visual education can convery health knowledge because easily to facilitate the reception of health message for pregnant women. Continuous education and monitoring of the of pregnant women diet every month during pregnancy classes at the posyandu are needed to prevent stunting in children.
Circulez, il n’y a rien à voir
Authors: Barbier Laura , Boudia Soraya
Published: November 2021

À travers l’étude de l’exceptionnelle longévité du modèle dose-effet linéaire sans seuil, pierre angulaire de la définition des normes d’exposition des travailleurs de l’industrie nucléaire, cet article étudie le rôle des modèles dans le travail de maintenance de la robustesse d’un système d’évaluation des risques face à l’évolution des connaissances. Il éclaire ainsi sous un angle différent la production de l’expertise scientifique et sa légitimation dans la durée pour l’évaluation et la gestion des risques professionnels. Il prend comme point de départ l’étude épidémiologique INWORKS ( International Nuclear Workers Study ). Cette étude, la plus aboutie à ce jour sur les travailleurs du nucléaire, a fourni pour la première fois des preuves directes des risques de cancers liés aux expositions aux faibles doses. Cependant, loin de remettre en cause le modèle dominant, elle est finalement mobilisée pour renforcer les bases scientifiques de la radioprotection. L’article illustre comment le travail de maintenance de la robustesse d’un modèle d’évaluation des risques sur une longue durée face à l’évolution des connaissances s’appuie à la fois sur une réactivation régulière des incertitudes et sur l’entretien de l’apparente constance d’un modèle dont le contenu et l’usage se transforment.
An anonymous SIP authenticated key agreement protocol based on elliptic curve cryptography
Authors: Lu Yanrong ,   School of Safety Science and Engineering, Civil Aviation University of China, Tianjin, China, Zhao Dawei ,   Shandong Provincial Key Laboratory of Computer Networks, Shandong Computer Science Center (National Supercomputer Center in Jinan), Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
Published: November 2021

Designing a secure authentication scheme for session initial protocol (SIP) over internet protocol (VoIP) networks remains challenging. In this paper, we revisit the protocol of Zhang, Tang and Zhu (2015) and reveal that the protocol is vulnerable to key-compromise impersonation attacks. We then propose a SIP authenticated key agreement protocol (AKAP) using elliptic curve cryptography (ECC). We demonstrate the correctness of the protocol using Burrows-Abadi-Needham (BAN), and its security using the AVISPA simulation tool. We also evaluate its performance against those of Zhang, Tang and Zhu, and others.