bluuebunny/crossref_metadata_2025 huggingface dataset:
Public countertops as sources of microbial infections in Calabar, Nigeria
Authors: Otu-Bassey I.B. , Ibeneme E.O. , John E.I.
Published: November 2022

Contamination of inanimate objects and environmental surfaces by microorganisms plays a significant role in the transmission of infection. This study was carried out to ascertain the role of countertops as infection source. A total of 240 public counters including wood granite, tiles and plastics in different establishments were screened for the presence of potential bacterial and fungal pathogens using standard microbiological and biochemical methods. Countertops were swabbed using sterile moist swabs and cultured using peptone water, Blood Agar, CLED, and Sabouraud dextrose agar. Of the 240 countertops examined, 220 (91.6%) harbored microbes with Police Stations counters ranking highest 50 (100%) followed by Banks counters 58 (97.0%) while Bakeries counters had the least 10 (66.7%). The prevalence of microbes by location statistically significant (p= 0.0001). Wooden countertops carried more microbes 35 (97.2%) than other countertops p=0.3295). Generally, the studied countertops carried more bacteria (90.8%) than fungi (12.5%). Countertops of banks carried more bacteria (96.6%) while those of bakeries carried the least (66.7%) whereas countertops of police station harbored more fungi (24.0%) than those in other establishments with eateries counters carrying no fungi at all. Staphylococcus aureus was the most frequently encountered bacteria (95.0%) followed by Proteus mirabilis and Pseudomonas aeruginosa (1.8% each), and Shigella species (1.3%). Candida albicans dominated among the fungal isolates (80.0%) followed by Aspergillus (13.3%) and Trichophyton rubrum (6.6%). This study has demonstrated high prevalence of potential microbial pathogens on public counters which may constitute a public health risk to users. Regular cleaning, periodical microbiological assessment of public countertops and cautiousness whenever interacting with environment is recommended.
Effects of melatonin consumption on some oxidative stress biomarkers of stress-exposed pregnant rats.
Authors: Aliyu B. , Mohammed U. , Oyeniyi Y.J.
Published: November 2022

Melatonin acts as a free radical scavenger and nuclear and mitochondrial DNA from free radicals-induced damage. This study was designed to test the hypothesis that melatonin may mitigate the effect of restraint stress in pregnant rats by mechanisms associated with stimulation of antioxidant enzymes and reduction in malondialdehyde (MDA) levels. Pregnant Wistar rats aged between 10-12 weeks and weighing 125±5.5g (mean ±SEM), were randomly divided into three groups (n= 8 each) that had the following treatments: non- stress with vehicle (NSV), stress with vehicle (SV) and stress with melatonin (SM). During the second week of pregnancy, the rats were individually restrained for 1 hour a day for one week. Melatonin (10mg/kg) was administered orally to the treatment group (SM) every day throughout the stress exposure period while the control groups (NSV and SV) received the vehicle (water). Three weeks after delivery, the rats were euthanized and the antioxidant enzymes [catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx)] and MDA levels were measured. The CAT values SV rats were significantly (P<0.001) lower than in NSV and SM rats. The values for GPx and SOD followed the same pattern with CAT. The MDA value obtained from the SV rats were significantly (P<0.0001) higher than the values obtained from NSV and SM rats. The MDA values obtained from the SM rats were significantly (P<0.05) higher than in NSV rats. Results suggest that melatonin helps in countering the effects of restraint stress in pregnant Wistar rats by increasing the serum levels of CAT, GPx and SOD while reducing the serum level of MDA. It is concluded that stress- induced reduction in antioxidant enzymes and attendant increase in lipid peroxidation are mitigated by melatonin.
Alterations in some haematological parameters, ascorbic acid and pantothenic acid levels among pregnant women with plasmodium parasitaemia in Sokoto, Nigeria
Authors: Sulaiman Sule Umar , Erhabor Osaro , Abdulrahaman Yakubu , Zama Isaac , Onuigwe Festus Uchechukwu , Buhari Hauwa , Bagudo Aliyu , Marafa Ahmed , Erhabor Tosan
Published: November 2022

Malaria in pregnancy is a major contributor to adverse maternal and prenatal outcome. In hyper endemic areas like ours, it is a common cause of anaemia and the haematological abnormalities. This case-control study evaluated the full blood count, ascorbic acid and pantothenic acid level of sixty (60) malaria parasitized pregnant women. Participants were recruited from Antenatal Clinic of Specialist Hospital Sokoto. A structured interviewer-administered questionnaire was used to obtain some socio-demographic characteristic and blood samples were collected and examine for malaria parasite, some haematological parameters (HCT, HGB, WBC, RBC and platelet count) were measured using the HA6000 auto-haematology analyzer (Perlong Medical Equipment Company). Ascorbic acid levels were assayed by a standard chemical method and pantothenic acid levels was analyzed using the ID-VIT pantothenic acid ELISA kit. Malaria parasitaemia and parasite load was confirmed by the examination of a Giemsa- stained thin blood film. Data generated was analyzed using SPSS 22.0 statistical package. A p- value ≤ 0.05 was considered significant in all statistical comparisons. The HCT, HGB RBC and Platelet counts of the parasitized subjects were significantly lower compared with the controls (p<0.05). Also, the ascorbic acid level of parasitized subjects was significantly lower compared to that of controls. There was a strong correlation between ascorbic acid and platelet count (r= 0.413 and p= 0.00). The mean parasite count among the parasitized subjects was 5.93 ± 2.72 × 103/ìL. Findings of this study has shown that malaria in pregnancy causes decrease in vitamin C and some of the haematological parameters. There is need to routinely monitor the vitamin C and full blood count should among parasitized pregnant women. We advocate that vitamin C and pantothenic acid be included in the guidelines of multivitamin supplementation particularly among plasmodium parasitized pregnant women.
Morbidity and mortality of tetanus at Kenyatta National Hospital: a ten-year case audit
Authors: Teny Ruot G. , Maritim Marybeth C. , Bhatt Kirna M.
Published: November 2022

Introduction: Tetanus is a major health problem in developing countries, and is associated with high a morbidity and mortality. There are no recent local data in Kenya on the impact of the disease in terms of morbidity and mortality. The objective of this study was to describe the type, severity, risk factors, immunization history and outcome of tetanus patients at Kenyatta National Hospital (KNH).

Method: This was a retrospective descriptive study of patients with a clinical diagnosis of tetanus admitted to KNH over ten years, who were aged 13 years and above. All available files with tetanus diagnosis were selected, and the patients’ data were retrieved and analysed using SPSS Software version 21.0.

Results: Out of 53 patients with tetanus, 50 (94.3%) were males and 3 (5.7%) were females. The mean age at presentation was 33.2 years (SD= 15.6). Only 4 (7.5%) patients had prior tetanus immunization. The commonest risk factor was acute injury - seen in 37 (69.8%) patients. The common site of injury was the lower limb - seen in 26 (49.1%) patients. The incubation period ranged from 3 to 90 days (IQR 7-17). Generalized tetanus was the commonest form found in 50 (94.3%) patients. Only 16 (30.2%) patients were managed in the Intensive Care Unit (ICU). The overall mortality was 49.1%.

Conclusion: Tetanus mortality is still high as reported in many other studies. Most patients were males without prior immunization history. Only few patients were managed in Intensive Care Unit. We recommend advocacy on tetanus immunization and booster dosing.
Integrable Ito equations with multiple noises
Authors: Gaeta Giuseppe , Rodriguez Miguel Angel
Published: November 2022

The classification of scalar Ito equations with a single noise source which admit a so called standard symmetry and hence are -- by the Kozlov construction -- integrable is by now complete. In this paper we study the situation, occurring in physical as well as biological applications, where there are two independent noise sources. We determine all such autonomous Ito equations admitting a standard symmetry; we then integrate them by means of the Kozlov construction. We also consider the case of three or more independent noises, showing no standard symmetry is present.
Robust State Machine Passivity-based Control Applied to Fuel Cell Hybrid Source
Authors:   Energy Systems Modelling Laboratory (MSE), MESSAOUD Mohammedi ,   University Mohamed Khider of Biskra, Blocs 10 labo ",   ",   Campus BAHLALI SAID",   ",   , BP 145 RP، Biskra 07000 Algeria 2Electromechatronic Systems Research Centre (CISE), Universidade da Beira Interior, Covilhã, Portugal", OKBA Kraa ,   Energy Systems Modelling Laboratory (MSE); University Mohamed Khider of Biskra, Blocs 10 labo "Campus BAHLALI SAID", BP 145 RP، Biskra 07000 Algeria, ILYES Tegani
Published: November 2022

The disadvantages of fuel cell systems, such as their high cost, lack of reactivity, and inability to collect energy when the fuel cell vehicle is braking, can be overcome by hybridization with storage devices such the battery or the supercapacitors, which is capable of doing so. The energy management system is regarded as an important technique for the hybrid system. Its primary function is to autonomously identify the appropriate quantity of energy that will be supplied by the hybrid source to meet the demand in terms of the load's energy requirements. The primary purpose in this work is the design and validation of an energy management technique based on the state machine and the passivity-based control to manage and control the energy flow of a hybrid fuel cell vehicle's power source, with a fuel cell system serving as the primary source of power and batteries and supercapacitors serving as the secondary sources of power. The results of MATLAB simulations show that the proposed strategy works as expected and the control system has robust dynamic features. Consequently, the passivity-based control makes possible to globally control the hybrid system which has been presented by a state space model in order to reach a set of stable equilibria. Whereas, the state machine is efficient in terms of performance, easy to implement, and provides ideal balance between the amount of energy that is generated and the amount that is consumed.
BRITISH IDENTITY MANIFESTATIONS IN THE POSTMODERN LITERARY FRAME
Authors: Gasparyan Seda , Yernjakyan Nvard
Published: November 2022

National identity can be traced in almost all the spheres of human habitat – cultural, institutional, political, literary, pshychological, daily routine and many others, that is both in the verbal and non verbal activities of all and each person, respectively. In this research we look upon the British identity manifestations in the post-modern multifaceted literary frame based on the English short story contexts. Given the popular approach of the marked British conventionalism, concepts and cultural artefacts, as it were, we elucidate the stories of three  contemporary women writers — A.S. Byatt; J.Gardam and D.Moggach, as a field to reveal literary reproductions of identity paradigm and its social-cultural component in view of the city of London and certain niches of its subcultures. The analysis produces challenging ideas when considering social and spatial distinctions of London’s image according to the writers’ subjective attitudes, as well as the moral of the past and present, which are portrayed by three main topics: intellectuality and erudition (the London library); arts and theatre (the National Theatre and  Shakespeare); Post-colonial reality (Pakistani shopkeeper’s British dream-home), all of them as inseparable components of British national identity.
Antimalarial Assessment of Indigofera tinctoria Methanol Leaf Extract in Parasitized Albino Rats
Authors:   Department of Biochemistry, Faculty of Life Science, Kebbi State University of Science and Technology Aliero, Kebbi State, Nigeria., Nwaogu Jude , Ukwuani-Kwaja Angela Nnenna ,   Department of Biochemistry, Faculty of Life Science, Kebbi State University of Science and Technology Aliero, Kebbi State, Nigeria., Kusuma Benjamin ,   Department of Biochemistry, Faculty of Life Science, Kebbi State University of Science and Technology Aliero, Kebbi State, Nigeria.
Published: November 2022

This study was undertaken to investigate the antimalarial activity of Indigofera tinctoria in Plasmodium berghei-infected rats. Phytochemical investigation was conducted using standard method to determine the presence of the bioactive compounds. The in vitro anti-malarial assay of Indigofera tinctoria was carried out in triplicates in 96 wells microliter plate. The in-vivo anti-malarial effect was assessed with group serving as the normal control, group two was left untreated, group three was treated with the standard drug wile group four, five and six were treated with 100mg/kg, 200mg/kg and 400mg/kg respectively. Indigofera tinctoria revealed the presence of saponins, tannins, flavonoids, alkaloids, cardiac glycosides, steroids and quinines. For in vitro studies, the drug treated group had the lowest parasite count with a percentage protection of 93.65% while the percentage protection of the group that received the highest dose of the extract had a percentage protection of 79.50%. At Day 3, the untreated group still had its parasite count significantly higher than that of the other groups, while the lowest percentage count was recorded in the drug treated group. For the in vivo studies, the parasite count of the group that received the highest dose of the extract was not significantly different from that of the group treated with the standard drug. The percentage inhibition of the drug control at Day 3 was 93.82 while that of the group that received the highest dose of the extract was 80.06%. The parasite count before treatment (Day 0) for the normal control was significantly different (P<0.05) from that of the other groups. At Day 1, the parasite count for the induced control was significantly (P<0.05) higher than that of the other groups. There was no significant difference (P>0.05) between the groups treated with the extract. At Day 6, the percentage inhibition for the drug control was 87.58%, while that of the extract treated groups were 39.98%, 57.86% and 76.48% respectively. At Day 9, there was not significantly difference between the normal control, the drug control and the group treated with the highest group of the extract. The potent antimalarial activity observed could be attributed to the presence of the secondary metabolites in Indigofera tinctoria leaves extracts.
Development of Innovation Culture Based on Human Resources Management with Local Cultural Values
Authors:   Faculty of Economics and Business, Warmadewa University, Denpasar, Bali, Indonesia, Sitiari Ni Wayan , Sarmawa I Wayan Gde ,   Faculty of Economics and Business, Warmadewa University, Denpasar, Bali, Indonesia, Datrini Luh Kade ,   Faculty of Economics and Business, Warmadewa University, Denpasar, Bali, Indonesia, Puspa Ningsih Ni Luh Anik ,   Faculty of Economics and Business, Warmadewa University, Denpasar, Bali, Indonesia
Published: November 2022

This study aims to produce a model of developing a culture of innovation through an HRM approach in HRM practices and a cultural approach. This research was conducted on cooperatives in Bali. The research population is cooperative in Bali. Respondents are cooperative managers. Total population is 1371 people with 93 as sample using Slovin formula. The object of research is about the culture of innovation, human capital, human resource practices, and local Balinese cultural values. Inferential statistics using Partial Least Square to analyze data and test hypotheses. The results of this study resulted in a model to strengthen the innovation culture determined by HRM, namely through an approach to HRM practices based on local cultural values. Culture in the form of values is an external factor that is able to encourage the internal environment to innovate. This study found that human capital did not mediate the influence of HRM practices on the culture of innovation, but HRM practices had an effect on human capital.
Healthcare Accessibility in Developing Countries: A Global Healthcare Challenge
Authors:   Physician, Research Division, Oncomarks.org, Chicago, IL, USA, Chowdhury Juel , Ravi Rejoice Puthuchira ,   Epidemiologist, Research Division, Oncomarks.org, Chicago, IL, USA
Published: November 2022

Access to healthcare is a fundamental human right and a pillar of the country’s sustainable development. Rural residents face a variety of challenges to accessing healthcare across the world. The Geneva report by the International Labour Organization shows that 56 percent of rural residents lack access to essential healthcare services. The study’s primary objective was to address the challenges of healthcare accessibility in rural areas of developing countries. In this research article, we have addressed the significant barriers to access to healthcare existing in the community. Every year, over 600,000 women die from preventable causes. These women die without skilled care or due to traditional, harmful birth practices used by their families or untrained attendants. Vaccines are estimated to save children under five from 2.5 million deaths annually. Lifesaving vaccinations are unavailable to one out of every five children. One major issue is shortages of workers, which are made worse by imbalances in the workforce. Transport barriers often hinder healthcare access in rural areas. Globally, many countries are working with the World Health Organization to provide essential health services to the most vulnerable and needy. Governments and other international organizations can introduce new policies to improve the health and life expectancy of rural populations in developing countries by increasing access to healthcare
Protein Quality of Extruded Ready-to-Eat Baby Foods from Orange-Fleshed Sweet Potato, Amaranth Seeds, and Soybean Flour Blends
Authors: Nkesiga Jackson , Anyango Joseph , Ngoda Peninah
Published: November 2022

Purpose: Protein quality refers to the total protein content, essential amino acid content, and digestibility of a protein. Source, bioavailability, food matrix, and processing conditions all have an impact on protein quality. Protein quality can be lost during food processing. This study was carried out to investigate the effect of extrusion cooking and blend proportions on the protein quality of extruded ready-to-eat baby foods.

Methodology: Different blends of orange-fleshed sweet potato, amaranth seeds, and soybean flour were used and analyzed for protein quality including in vitro protein digestibility (IVPD) of extruded ready-to-eat baby foods. In addition, nutrient damage due to heat or processing temperature was evaluated by analyzing available lysine in the end products to ensure the quality of extruded ready-to-eat baby foods. Extrusion cooking was carried out at a temperature of 90oC, screw speed of 400 rpm, and feed moisture content of 35%.

Findings: The results showed that IVPD ranged from 54.05 to 91.87%. The available lysine as a parameter to evaluate the nutritional damage due to thermal processing ranged from (1.69 to 2.79%). This research predicts the potential availability of highly digestible protein as well as the assurance of lysine availability once extrudates are consumed. Achieving high lysine retention during extrusion cooking depends on a number of factors, including low temperature, high screw speed, high feed moisture content, and high shear forces that lead to a short residence time.

Recommendation: It is important to conduct more research on how extrusion cooking affects the molecular and physical interactions between starches, proteins, lipids, and phenolic compounds.
Organizational Learning Culture and Employee Work Attitude in Deposit Money Banks in Rivers State
Authors: Jonah Charles Tambari
Published: November 2022

Purpose: This study examined organizational learning culture and employee work attitude in deposit money banks in Rivers State.

Methodology: A systematic review of extant literature on variables such as proactivity, commitment to cultural diversity, job satisfaction and employee involvement were done. The study adopted the correlational research design. A population of six hundred and seventy-eight (678) employees of deposit money banks in Rivers State was obtained. The Spearman test statistics was employed in examining the four formulated hypotheses. A structured questionnaire was adopted as the research instrument. The hypotheses were tested using the Spearman’s Rank Order Correlation Coefficient. The tests were carried out at a 0.05 significance level.

Findings: The study revealed that proactivity influences employee involvement and job satisfaction. Further, the study showed that commitment to cultural diversity influences employee involvement and job satisfaction respectively. Based on the findings, the study concluded that organizational learning culture influences positive employee work attitude in the understudied deposit money banks in Rivers State.

Recommendation: Following the findings and conclusion, the study recommended that deposit money banks should enhance the proactivity levels of the employees through practices such as workshops, trainings, deference to expertise and tolerance to risk taking. This helps in encouraging positive work attitudes such as employee involvement and job satisfaction. Commitment to cultural diversity (through, work socialization, effective communication, inclusion, openness, and fairness) is a strategy to attain desired positive work attitudes such as employee involvement and job satisfaction.
ENERGIA RENOVÁVEL: ENERGIA SOLAR FOTOVOLTAICA RESIDENCIAL
Authors: Otavio Viana Luis , Pinto do Nascimento Neto Antônio , Florian Fabiana
Published: November 2022

Este trabalho tem o objetivo de realizar um estudo sobre a energia solar fotovoltaica, informando que é uma energia obtida através da conversão direta da luz em eletricidade por meio do efeito fotovoltaico. A célula fotovoltaica é um dispositivo fabricado com material semicondutor, é a unidade fundamental desse processo de conversão. Este tipo de energia usa-se para alimentar uma grande variedade de aplicativos e aparelhos autônomos, para abastecer refúgios ou moradias isoladas da rede elétrica e para produzir eletricidade em grande escala através de redes de distribuição. Devido à crescente demanda de energias renováveis, a fabricação de células solares e instalações fotovoltaicas tem avançado consideravelmente nos últimos anos. Para a realização deste artigo, optou-se pela revisão bibliográfica disposta em livros, teses, artigos, normas e outros documentos relevantes ao tema proposto. Para o levantamento de dados foram utilizadas bases de conteúdo Scielo e Google a fim de revisar artigos e teses experimentais de estudo das energias renováveis. Esta pesquisa se justifica devido à relevância, tanto para a sociedade como para profissionais do setor das indústrias, a fim de trazer conhecimento de materiais, técnicas e processos convencionais de fabricação, uso e instalação desta tecnologia.
The Chinese Cultural Elements of the Ullambana Festival
Authors: Zhao Yin
Published: November 2022

Buddhism was disseminated from India to China during the Han Dynasty (202 B.C.-220 C.E.) and incorporated local Chinese cultures. It emerged gradually as a specific cultural phenomenon with Chinese features. According to Li Li’an, such a phenomenon could be considered a miniature of all the foreign cultures’ destiny in China, too (Li, 2006). The Ullambana Festival of Buddhism experienced a long process of change within Buddhism itself. The Ullambana Service of Chinese Buddhism is a glittering example of this historically peerless amalgamation of two of the world’s most remarkable ancient civilizations. Thus, this paper attempts to investigate the Chinese cultural elements of the Ullambana Festival during its transmission in China to explore the localization of Buddhism in China further.
НОРМАЛИЗАЦИЯ ВХОДНЫХ ДАННЫХ ДЛЯ ПРОГНОЗИРОВАНИЯ УРОЖАЙНОСТИ ПШЕНИЦЫ
Authors: С. Е. Шарипова  , А. С. Аканова  , Н. Н. Оспанова  , Е. Б. Шарипов
Published: November 2022

"В данной статье рассматривается нормализация входных данных для прогнозирования урожайности пшеницы. Объектом исследования в рамках статьи являются входные данные нейронной сети. В рамках данного исследования рассматривается влияние таких параметров как, внесение удобрений, содержащих фосфор и азот на урожайность пшеницы с 1997 года по 2021 год. В ходе исследования были рассмотрены методы нормализации такие как минимаксная, z-средняя и робостная нормализация. В последующем была осуществлена нормализация имеющихся входных данных. С помощью полученных данных была обучена нейронная сеть прогнозирования урожайности пшеницы. В итоге был проведен сравнительный анализ способов нормализации по таким показателям, как ошибка обучения и точность обучения. По результатам исследования робостный метод нормализации привел к наилучшему результату: ошибка 0,01. Полученные результаты объясняются тем, что, когда к одному и тому же набору данных применяются разные типы методов нормализации с использованием одного и того же метода машинного обучения, результат может отличаться. Робостная нормализация проста в использовании и дает улучшенный результат по сравнению с другими методами нормализации. Ключевые слова: нейронная сеть, нормализация, прогнозирование, зерновые культуры, фосфор, удобрение."
"ХАРАКТЕРНЫЕ ОСОБЕННОСТИ ЭЛЕКТРОНАГРЕВА ТЕПЛОПЕРЕДАЮЩЕЙ СРЕДЫ КОНВЕКТИВНОЙ СУШИЛКИ "
Authors: Р. М. Искаков  , Г. К. Кубентаева  , Р. Т. Қасым  , А. М. Акаев
Published: November 2022

"В статье рассматриваются исследования по систематизации характерных особенностей электронагрева при проведении процесса конвективной сушки. На основании разработанной схемы уровня иерархии системного анализа электрического нагрева выявлено, что повышение эффективности электронагрева можно достигнуть за счет совершенствования конструкции нагревателя и оптимального режима нагрева воздуха с уменьшением времени теплоотдачи и охвата теплового контакта активной зоны с нагреваемой газовой средой. Описывается запатентованная конструкция устройства для производства кормовой муки животного происхождения (патент Республики Казахстан № 7276), позволяющая осуществлять конвективную сушку с применением электронагревателя и воздуходувки для распределения горячего воздуха. При обзоре научной информации выявлено, что в исследованиях пристальное внимание обращается на уровни температуры сушилки с электрическим нагревателем, энергоэффективность сушилки, энергосберегающий метод, инфракрасный нагреватель, мощность нагревателя, что подтверждаются эмпирическими данными, зависимостями, схемами, объясняющими и обосновывающими действия нагревателей. При этом многие исследования ученых опираются на использование излучающих и конвективных секций нагревателей прямого нагрева, показания средней температуры воздуха вдоль сечения нагревателя, равномерный нагрев воздуха с поверхности обогревателя, проволок сопротивления и кремний-углеродных стержней, перегородок. Ключевые слова: электрический нагреватель, сушка, конвекция, теплоотдача, температура. "
ИССЛЕДОВАНИЕ ДЕЛИТЕЛЯ МОЩНОСТИ АКТИВНОЙ ФАЗИРОВАННОЙ АНТЕННОЙ РЕШЕТКИ
Authors: А. Е. Кулакаева  , А. И. Самсоненко  , Ж. Ж. Онгенбаева  , С. С. Қойшыбай  , Р. Ж. Камал
Published: November 2022

В настоящее время для радиотехнических систем наибольший интерес представляют антенны типа активно-фазированных антенных решеток, в которой к каждому излучателю антенной решетки подключается активный элемент в виде усилителя мощности, генератора или преобразователя частоты. Основной целью настоящей работы является исследование одного из основных блоков антенны типа активно-фазированных антенных решеток, в частности системы распределителя мощности, обеспечивающего распределение сигнала от общего возбудителя по всем каналам активно-фазированных антенных решеток. В данной статье были исследованы основные технические характеристики активно-фазированных антенных решеток. Также были рассмотрены основные виды делителей мощности активно- фазированных антенных решеток, их структурные схемы построения, а также проведены измерения амплитудно-частотных параметров делителей и характеристик согласования. Также исследован частный случай от большого многопортового делителя активно-фазированной антенной решетки. Проведены измерения амплитудно-частотных параметров делителей активной фазированной антенной решетки и характеристики солгасования с помощью анализатора спектра Microwave Analayser N9915A на базе ДТОО «Институт космической техники и технологий». Данные исследования могут быть актуальны для последующего этапа проектирования активной фазированной антенной решетки.
"АНАЛИЗ РАБОТЫ ФУТЕРОВОК РАЗЛИВОЧНЫХ КОВШЕЙ"
Authors: А. С. Никифоров  , А. К. Кинжибекова  , Е. В. Приходько  , Н. М. Арипова  , А. Е. Карманов
Published: November 2022

"В статье рассмотрены основные причины, из-за которых происходит разрушение футеровки разливочного ковша ферросплавного производства. Рассмотрена футеровка ковша, выполненная из шамотных кирпичей и изготовленная в два слоя без теплоизоляции. Для оценки степени износа футеровки были использованы: термографическое исследование с помощью тепловизора и обследование внутренней поверхности разливочного ковша. По результатам исследования, износ огнеупорных материалов наблюдается в районе шлакового пояса и в месте попадании струи выпускаемого металла на стенки ковша. Наиболее значительный износ футеровки наблюдается в зоне шлакового пояса, где кроме химического воздействия шлака имеется влияние температурных напряжений. В целом же, износ футеровки по высоте ковша равномерный, с основными дефектами в виде сколов. Причина образования сколов – температурные напряжения, возникающие при высоких скоростях нагрева или охлаждения. Стойкость ковшей с рабочим слоем из шамотного кирпича составляет в среднем 5-8 плавок, при этом скорость износа около5 мм за плавку. Разливочные ковши выводятся на частый промежуточный ремонт из-за неравномерности износа шлакового пояса, образования двух зон локального износа под настылью, образующейся на границе «шлак-металл». Средняя остаточная толщина огнеупоров перед промежуточным ремонтом 65 мм, при начальной толщине 80 мм. Ключевые слова: разливочные ковши, футеровка, износ, охлаждение, температурные напряжения."
ВЫСОКОЭФФЕКТИВНАЯ ВЕТРОЭНЕРГЕТИЧЕСКАЯ УСТАНОВКА МАЛОЙ МОЩНОСТИ С БУРЕВОЙ ЗАЩИТОЙ
Authors: И. А. Шумейко  , А. Ж. Касенов  , С. М. Нуркимбаев
Published: November 2022

"Казахстан в силу своего географического расположения и климатических условий обладает значительным ресурсами в виде солнечной энергии и энергии ветра. На большей территории страны среднегодовые скорости ветра составляют 4-5 м/с, а в ряде регионов превышают 6 м/с, что создаёт хорошие условия для развития ветроэнергетики. Развитие энергетики в Павлодарской области идёт на основе невозобновляемых источников энергии, что ведет к истощению природных запасов топлива и ухудшению экологической обстановки. Создание и использование возобновляемых источников энергии, в частности ветровых агрегатов, создаёт благоприятные условия для устойчивого социально-экономического развития Республики Казахстан. Особенно это актуально для удалённых от линий электропередач крестьянских хозяйств, отгонных пастбищ, фермерских хозяйств. Целесообразно использование ветроэнергетических установок (ВЭУ) и с целью экономии электрической энергии как в сельской местности, так и в частных подворьях в городских условиях. Применяемые, в частности в Павлодарской области, трёхлопастные ВЭУ малой мощности не имеют автоматического регулирования частоты вращения ветрового колеса (ВК) и могут при высокой скорости ветра раскручиваться до такой степени, что выходит из строя электроаппаратура, или даже до разрушения лопастей. Мониторинг ВЭУ Павлодарской области, в основном кустарного производства, показал их низкую эффективность, неустойчивость к порывам ветра, отсутствие какой-либо буревой защиты. Предлагается конструкция ВЭУ малой мощности, повышение эффективности которой будет достигнута путём использования в ВК оптимальных конструктивных параметров (число лопастей, их форма, угол установки, относительная площадь лопасти), полученных в процессе экспериментальных исследований на действующих моделях ВЭУ с помощью аэродинамической трубы, обеспечивающей постоянство скорости воздушного потока. Ключевые слова: ветроэнергетическая установка (ВЭУ), ветровое колесо (ВК), момент, частота вращения, мощность, эксперимент, конструкция, модель, скорость воздушного потока, механизм"
"ИССЛЕДОВАНИЕ ВЕТРОУСТАНОВКИ В СИСТЕМЕ АВТОНОМНОГО ЭЛЕКТРОСНАБЖЕНИЯ "
Authors: С. С. Исенов  , А. Б. Кайдар  , Б. К. Шапкенов  , С. К. Шерьязов
Published: November 2022

"Материал статьи посвящен разработке системы автономного электроснабжения. Приведена специфика электропотребления сельскохозяйственных потребителей. Дана структурная схема гибридной системы электроснабжения на базе ветросолнечной электростанции и бензиновым электрогенератором. Выполнен анализ использования бензиновых и дизельных генераторов, который показывает, что для маломощных потребителей их применение нерентабельно, в связи с высокой стоимостью топлива и низким моторесурсом. В статье приведен анализ нескольких широко известных автономных систем электроснабжения с конструкциями ветроколес подобных приведенному в статье, но имеющие ряд недостатков, которые затрудняют их применение на практике. Рассмотрен вариант ветрогенератора, ранее разработанный авторами статьи, у которого имеется два встречно вращающихся ветроколеса, который обладает преимуществами по сравнению с известными ветрогенераторами. Далее предложена конструкция ветрогенератора на базе разработки авторов и принципиальная схема управления ветрогенератором и схема автономного электроснабжения, которые являются дальнейшим развитием как ветрогенерирующих установок, так и схем автономного электроснабжения. Приведенная конструкция ветрогенератора, принципиальная схема управления системы автономного электроснабжения, включающая автоматику ветрогенератора, позволяют существенно повысить генерацию электроэнергии. Приведены алгоритм работы ветроустановки и системы электроснабжения результаты экспериментальных исследований разработанной ветроустановки специальной конструкции, в частности зависимости напряжения на выходе ветрогенератора на холостом ходу и под нагрузкой при различных скоростях ветра. Предлагаемая система автономного электроснабжения с использованием солнечной и ветровой энергии может быть использовано, в частности, для сельских поселений, коттеджных, дачных поселков, комплексов отгонного животноводства, поливного земледелия и других фермерских хозяйств, малых предприятий различного назначения, отдаленных нефте- и газопропромысловых участков. Ключевые слова: возобновляемые источники энергии, ветроэнергетика, генерация электроэнергии, автономное электроснабжение, ветрогенератор, ветроколеса."
ҚЫСҚАТҰЙЫҚТАЛҒАН РОТОРЛЫ АСИНХРОНДЫ ҚОЗҒАЛТҚЫШТАРДЫҢ ЭНЕРГОТИІМДІЛІГІН ЖОҒАРыЛАТУ ТӘСІЛІ
Authors: А. К. Мукат
Published: November 2022

"Бұл мақалада «Қысқа тұйықталған рогторлы асинхронды қозғалтқыштардың энерготиімділігін жоғарлату тәсілі» қазіргі заманғы электр жетегінің жүйелерінде жиі қолданылатын қозғалтқыштардың теориялық моделі ұсынылған. Олар өнеркәсіпте, құрылыста, ауыл шаруашылығында және тұрмыста кеңінен таралған.Бұл электр машиналарының теориясы жоғары оқу орындарының ірі және кеңінен танымал ғалымдары, конструкторлары мен профессорлары болып табылатын отандық және шетелдік авторлардың оқулықтарында үйлесімді және қисынды жазылған.Теориялық және практикалық қолданудың дамуына ғалымдар үлкен үлес қосты.Осы мәселенің зерттеуін бастамас бұрын ең алдымен, қысқа тұйықталған ротормен бейсинхронды қозғалтқыштарында ротор ойықтарын жобалау бойынша қандай ұсыныстар бар екенін анықтайық. Біріншіден, осы өнімдер өндірісінің көп жылдық тәжірибесі бар ротор ойықтарының тексерілген ұтымды саны бойынша көлемді мәліметтер бар. Басқа сөзбен айтқанда, техникалық әдебиеттерде кез келген талап етілетін жағдайға ротор ойықтарының саны және олардың кескіндемелері бойынша нақты ұсыныстар болады. Екіншіден, ротордың барлық ойықтар ауданы одан да артық болу тиіс. Алайда, ондай тікелей сілтеме жоқ, бірақ бұл есептік қатынасын шығару барысынан анықталып,ротордың белсенді кедергілері тиімді электр магниттік түрленуіне бейсинхронды қозғалтқышының қабілетіне жағымсыз әсер етеді. Кілтті сөздер: қозғалтқыш, ротор, статор, энерготиімділік"
DETERMINING FACTORS FOR 10-YEAR LOCAL CURRENCY SOVEREIGN BONDS YIELD WITH DYNAMIC REGRESSION MODEL
Authors: Editya Dea Avega
Published: November 2022

Sovereign bonds, particularly Local Currency Bonds (LCB) of 10-year tenure, had a strategic role in economy, thus understanding factors affecting its yield’s movement would help government to maintain economic stability.

This paper empirically study Indonesia’s 10-year LCB and its relationship with several factors; US Treasury (UST) yield, credit default swap (CDS), foreign ownership, central bank's policy rate (policy rate), exchange rate, volatility index (VIX) and primary dealers' trading behavior. The relationship was modelled using Dynamic Regression Model (DRM), with ARIMA errors to absorb the dynamics. Evaluation on the model's performance was conducted by making prediction on the real LCB yield’s movement during 2021.

The best model containing 10y-UST yield and its lag-1, 5y-CDS and its lag-1, exchange rate, policy rate and ARIMA errors of AR(1) and AR(2) could perform well in predicting the real yield. This study confirmed that 10y-UST and its lag-1 are the main drivers for the LCB yield’s movement, along with compelling influence of the exchange rate.
Penugasan Kreasi Siniar dalam Pembelajaran Ekonomi: Mengasah Kemampuan Berpikir Kritis Siswa
Authors: Oktavianto Rizki
Published: November 2022

Penulisan best practice ini bertujuan mengetahui kontribusi penugasan kreasi siniar  atau siaran rekaman audio dalam pembelajaran Ekonomi sebagai upaya mengasah kemampuan berpikir kritis siswa di kelas XI IPS 1 SMAN 1 Bantul. Pendekatan yang digunakan dalam penulisan best practice adalah kualitatif deskriptif. Penulis menggambarkan pengalaman terbaiknya dalam mengasah kemampuan berpikir kritis siswa melalui penugasan kreasi siniar. Subjek best practice adalah siswa kelas XI IPS 1 di SMAN 1 Bantul Semester 1 Tahun Pelajaran 2022/2023 sejumlah 36 siswa yang sedang mempelajari materi Ekonomi bab Ketenagakerjaan. Penulisan menggunakan data primer yang bersumber dari kuesioner yang disebarkan melalui google form dan penilaian produk podcast yang dilakukan guru. Teknis analisis data dilakukan dengan mereduksi data yang telah diperoleh dari kuesioner dan penilaian, menyajikan dalam bentuk data kualitatif dan data kuantitatif, dan diakhiri dengan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa sebanyak 96,9% responden menyatakan menyukai penugasan kreasi podcast, 100% responden menyatakan mampu merumuskan pokok-pokok permasalahan, 97% mampu mengungkap fakta yang ada, 100% mampu memilih argumen yang logis dalam pembuatan podcast, 98% mampu mendeteksi bias dengan sudut pandang yang berbeda, 100% mampu memberikan kesimpulan terkait topik. Adapun, dari hasil penilaian guru didapatkan bahwa keseluruhan siswa telah mampu menghasilkan karya siniar dengan kualitas audio yang baik dan 83.3% siswa telah mampu menghasilkan karya siniar dengan ketajaman analisis serta data dan fakta yang tepat. Dengan demikian, penugasan kreasi siniar dapat menjadi solusi mengasah kemampuan berpikir kritis siswa.
Reassessing Epistemic Images in the Early Modern World
Authors: Noyes Ruth , Dekoninck Ralph , Margócsy Dániel , Somos Mark , Joffe Stephen N. , Campbell Angela , Bossche Jolien , Mûelenaere Gwendoline , Ellinghaus Julia , Remmert Volker , Kruse Britta-Juliane , Leitch Stephanie , Bont Anneke , Baker Tawrin , Monty Emily , Porras Stephanie
Published: November 2022

This edited collection of papers explores from an interdisciplinary perspective the role of images and objects in early modern knowledge-making practices with an emphasis on mapping methodological approaches against printed pictures and things. The volume brings together work across diverse printed images, objects, and materials produced c. 1500-1700, as well as well as works in the ambit of early modern print culture, to reframe a comparative history of the rise of the ‘epistemic imprint’ as a new visual genre at the onset of the scientific revolution. The book includes contributions from the perspective of international scholars and museum professionals drawing on methodologies from a range of fields.
Academic Print Practices in the
Southern Netherlands: Allegory and
Emblematics as Epistemic Tools
Authors: de Mûelenaere Gwendoline
Published: November 2022

This chapter demonstrates that student life constituted an important
source for the creation and circulation of printed images by considering
a visual domain that flourished in the Southern Netherlands in the
seventeenth century: illustrated college notebooks. The well-preserved
corpus presents an ambivalent relationship between knowledge and
imagination. This essay focuses on the symbolic language applied to
lecture notebooks, the usage of which was encouraged in similar academic
practices such as Jesuit affixiones and thesis prints. It also addresses the
materiality of prints and their manipulation by students. My hypothesis
is that the sphere of learning was, via the printing world, bathed with
Jesuit culture and visual language that perpetuated in higher education.
Images of the Eye from Vesalius to
Fabricius ab Aquapendente
Authors: Baker Tawrin
Published: November 2022

Illustrations of the eye were rare in printed medical and anatomical
works prior to Vesalius’s 1543 Fabrica. Subsequent epistemic images of the
eye, seen in figures such as Juan Valverde, Felix Platter, Johannes Kepler,
and Fabricius ab Aquapendente, had a complex relationship with the
evolving, and increasingly intertwined, disciplines of anatomy, natural
philosophy, and optics. Images of the eye reflected, and to some degree
helped to generate, new practices of reading, approaches to creating
knowledge, and the formation of communities. This analysis challenges
a widely-held distinction in early modern historiography between the
role of pictures in the anatomical/medical sciences and that of diagrams
in the mathematical sciences.
Illustrating the Vernacular Body : Juan
Valverde de Amusco and the Art of
Embodied Anatomy
Authors: Monty Emily
Published: November 2022

Andreas Vesalius’s Fabrica (Basel, 1543) presented knowledge of the human
body in woodcut pictures and Latin text. This chapter analyzes a Spanish
commentary on and translation of the Fabrica written by Spanish physician
Juan Valverde de Amusco and published in 1556 in Rome. Valverde’s
important contributions to the history of anatomical illustration are
understood by identifying a stylistic shift from Vesalius’s classicizing
idealism towards clarity in communicating practical applications and
sensory cognition. New engravings strengthen the epistemic potential
of Vesalius’s images for audiences encountering up-to-date anatomical
information in a vernacular register. Considering related publications
issued in London and Antwerp, Valverde’s treatise is positioned within a
trans-alpine epistemology of the body formed at the intersection of craft
and humanist knowledge.
Connected Mobilities in the Early Modern World
Authors: Nelles Paul , Salzberg Rosa
Published: November 2022

This book offers a panorama of movement, mobility, and exchange in the early modern world. While the pre-modern centuries have long been portrayed as static and self-contained, it is now acknowledged that Europe from the Middle Ages onwards saw increasing flows of people and goods. Movement also connected the continent more closely to other parts of the world. The present work challenges dominant notions of the ‘fixed,’ immobile nature of pre-modern cultures through study of the inter-connected material, social, and cultural dimensions of mobility. The case studies presented here chart the technologies and practices that both facilitated and impeded movement in diverse spheres of social activity such as communication, transport, politics, religion, medicine, and architecture. The chapters underscore the importance of the movement of people and objects through space and across distance to the dynamic economic, political, and cultural life of the early modern period.
Travelling for Health : Medicine and
Rural Mobility in Early Modern Spain
Authors: Schmitz Carolin
Published: November 2022

Healthcare and mobility were closely intertwined in the early modern
world. While studies have focused primarily on exceptional forms of
medical mobility, this chapter shifts the perspective by looking closely
at routine local and regional journeys performed by patients of humble,
mostly rural backgrounds in early modern Spain. Based on legal proceedings
produced by the Spanish Inquisition and other courts, this chapter
first elucidates the circumstances and motives that prompted people
to leave their local communities for health reasons. It then explores the
practical arrangements involved when embarking on such journeys,
including travelling partners and accommodations. Gaining a more nuanced
understanding of these frequent journeys for health helps overcome
simplistic explanations such as the lack of local medical provision. The
chapter offers a reassessment of how much geographic proximity really
mattered when deciding on a treatment within the context of medical
pluralism.
Devotion in Transit: Agnus Dei, Jesuit
Missionaries, and Global Salvation in
the Sixteenth Century
Authors: Nelles Paul
Published: November 2022

Agnus Dei were round disks made from the wax of the leftover paschal
candles in Rome and blessed by the pope. Stamped with the image of the
“Lamb of God,” they possessed powerful apotropaic and thaumaturgical
powers and were commonly used as amulets. Meant to be mobile, they
were particularly valued for their ability to ward off the perils of travel.
The paper explores the ways Agnus Dei intersected with both global
and local mobilities. The paper follows the circulation of the wax lambs
along the well-organized global communications network of the Society
of Jesus. The chapter locates the circulation of Agnus Dei and other
Christian devotional objects within a global economy of devotional
exchange.
Empreendedorismo na área tecnológica: experiências em tempos de desafios
Authors: Vasconcelos Íris Eucaris de , Almeida Yêda Medeiros Bastos de
Published: November 2022

A Universidade Federal de Pernambuco (UFPE), pautada pelos princípios da democracia, da transparência, da qualidade e do compromisso social, assume a Educação Superior como um bem público e um direito de todas e todos. Nesse sentido, estimula a melhoria das condições do trabalho docente, a inserção de metodologias de ensino inovadoras e a articulação dos conhecimentos teóricos e práticos nas diferentes áreas do saber como instrumentos de promoção de uma formação científica, humanística e artística que prepare nossos estudantes para a intervenção na realidade, segundo o compromisso com o desenvolvimento integral e sustentável, a equidade e a justiça social. Assim, a UFPE, por intermédio da Pró-Reitoria de Graduação e da Editora UFPE, oferta à comunidade acadêmica e à sociedade mais uma seleção da Série Livro-Texto, com o objetivo de contribuir para a formação da biblioteca básica do estudante de graduação e para a divulgação do conhecimento produzido pelos docentes desta Universidade. Os 34 livros selecionados para esta coleção, que contemplam diferentes áreas do saber, foram aprovados segundo as condições estabelecidas no Edital 14/2021 (Edital simplificado de incentivo à produção e publicação de livros digitais PROGRAD/Editora UFPE) e representam o esforço de discentes (de graduação e pós-graduação) e servidores (docentes e técnicos) e da gestão da Universidade em prol da produção, sistematização e divulgação do conhecimento, um de seus principais objetivos.