bluuebunny/crossref_metadata_2025_split huggingface dataset:
Photovoltaic Distribution Generation Case Study of 30/11kV(Alskarait Substation)
Authors: Abozaed M. I. , Abohger A. A. 
Published: June 2023

The Distribution Generation (DG), which is a new member of distribution systems, enhances system performance. The DG improves voltage profiles, reduces real power loss, increases the system capacity and reliability. It is intended to boost the infrastructure in an environmentally friendly manner in comparison to Conventional power sources. Achieving the aforementioned benefits requires installing DGs of appropriate capacity in appropriate location. The ultimate goal of this work is to meet expected load demands for the next ten years in Alskerat (Misurata substation) by means of a photovoltaic (PV) DG system. While PVsyst software was used to identify the type and number of PV modules and inverters, and NEPLAN software has been used to analyze and simulate the work of the PV system. The current loads in the Alskerat power station are 18 MW and the expected loads for the next ten years will be approximately 38 MW calculated by load growth formula rate. The increasing of generating capacity of 20 MW was done by placing an electric power production station using renewable energies, which are the photovoltaic modules. The results of this attempt show an improved voltage profile of the grid and overcome to voltage drop problem while increasing load. From the results, the voltage drop that was addressed to the value 26.89 kV has been improved to a normal 30 kV after connecting the photovoltaic station. In addition, a cost-effect analysis in this work illustrates an advantage for PV systems over Conventional systems.
دراسة منظومة PV لنافورة باستخدام الألواح الشمسية
Authors: الغويل عبدالباسط محمد , عمار محمد سالم 
Published: June 2023

إن التصميم لمنظومة النافورة المائية والتي تعمل بالتحويل الفوتوفولتائي المباشر لطاقة الإشعاع الشمسي وفق متطلبات المنطقة المدروسة من حيث قيم معدل طاقة الإشعاع الشمسي عليها. وقد تم حساب عدد وحدات القدرة المجهزة (الألواح الفوتوفولتائية) من معرفة القدرة الكلية لمنظومة النافورة الشمسية وقدرة اللوح الفوتوفولتائي المستخدم. لقد تم استخدام برنامج (مابل 12) وتطبيق العلاقة الخاصة لمعرفة عدد الألواح الفوتوفولتائية المجهزة للقدرة عند استخدام أي نوع من أنواع وحدات القدرة بما يقابلها من حجم قدرة المنظومة المطلوبة ولقد وجد أن القدرة الكلية للمنظومة تتناسب طرديا مع عدد الألواح المستخدمة عند كل نوع من الألواح الفوتوفولتائية المستخدمة. كما بين الرسم البياني قيم التدفق لمضخة النافورة وقيم أقصى ارتفاع يمكن أن يندفع إليه الماء فوجد أن هناك تناسبا عكسيا بين قيم التدفق والإرتفاع، فعند أقل ارتفاع كان لدينا تدفق (28.2 m3/h) وأقصى ارتفاع محسوب للمضخة (9 م) كان التدفق (6 m3/h).
ويمكن الاستفادة من القدرة على الاختيار بين أقل ارتفاع بأكبر كمية من التدفق وبتغيير شكل الأنبوب الناقل وتضييق فتحات الفوهات الموصلة في نهاية الأنبوب لنحصل على تدفق رذاذ من النافورة وحسب الشكل الذي صممت به مجموعة الفوهات حيث أن سرعة تدفق المياه من الفوهة تتناسب عكسيا مع قطر الفتحة التي تخرج منها المياه بتدفق ثابت.
دراسة مراحل النضج الجنسي لسمكة الكوالي (Scomber japonicas) بساحل مدينة طرابلس، شمال غرب ليبيا
Authors: ساسي سميرة موسى , ساسي ناجية موسى , بن ضو عائشة عبد الغفار 
Published: June 2023

أجريت هذه الدراسة على 128 عينة، جمعت من سوق السمك بمدينة طرابلس خلال الفترة من يناير 2013 م إلى إبريل 2013 م ، منها 51 ذكور، 77 إناث امتدت أطوالها من 17.8 سم إلى 29.5 سم، بينما تراوحت أوزانها مابين 50.2 جم إلى 243.6 جم، وذلك للتعرف على التوزيع الشهري لمراحل النضج الجنسي ومعامل الحالة التناسلية لسمكة الكوالي. أظهرت النتائج أن شهر يناير هو شهر التكاثر لسمكة الكوالي وأعلى قيمة لمعامل الحالة التناسلية سُجلت في شهر يناير في كلا من الذكور والإناث خلال فترة الدراسة.
تملح الترب الزراعية كأحد إشكاليات التنمية بمنطقة وادي الشاطئ
Authors: محمد عائشة رمضان , المثناني عبد السلام محمد , السعيدي محمد علي 
Published: June 2023

استهدفت هذه الدراسة إلقاء الضوء على مدى تأثر الترب الزراعية بمنطقة وادي الشاطئ بمشكلة الملوحة بسبب التنمية الزراعية والظروف المناخية والبيئية السائدة، وقد أظهرت نتائج هذه الدراسة ارتفاع الإيصالية الكهربائية لترب الطبقة السطحية مقارنة بالطبقة السفلية حيث تراوحت هذه القيم ما بين 1.08– 144.67 dS.m-1، بينما كانت أعلى في طبقة القشرة حيث تراوحت ما بين (77.00-195.03 dS.m-1) وذلك بسبب التراكم الشديد للأملاح ، كما بينت النتائج أن حاصل النسبة المحسوبة للعلاقة (3CO3 + HCO / Cl + SO4) كان < 1 مما يدل على إن الترب في طور إدمصاص شديد للصوديوم. وكانت النسبة ما بين الكبريتات/الكلوريدات < 1 لمعظم ترب المنطقة مما يدل على سيادة أملاح الكلوريدات وهذا يعني وصول الترب الى أطوار التملح الأخيرة. كما أظهرت النتائج ارتفاع قيم ESP عن 15% لمعظم الترب (4.4-49.6%) وكانت قيمها بالطبقة السطحية أعلى من السفلية. وبينت النتائج أن 84.4% من إجمالي الترب المدروسة متأثرة بالملوحة (67.5% ترب ملحية - صودية للترب غير المزروعة، 50% من الترب المزروعة)، وقد ساهم الماء الأرضي في تملح تلك الترب بشكل كبير حيث كانت القيم المحسوبة لدليل الملوحة < 1، إضافة إلى ارتفاع منسوبه وقربه من سطح الترب (أقل من العمق الحرج). ويزيد مناخ المنطقة من كمية التبخر بسبب ارتفاع معدلات الحرارة وسرعة الرياح وانخفاض رطوبة الجو النسبية. وكان تدهور الطبقة السطحية للترب أكثر منه في الطبقة السفلية ويظهر ذلك بشكل أكبر في الترب غير المزروعة حيث قدر أقصى معدل للتراكم الفصلي للأملاح بحوالي 124.80 طن/هكتار ووصل أقصى سمك لتلك القشور 5 سم.
TEM Image Analysis of Fracture Surfaces of P91 Steel and Comparison with Mechanical Properties
Authors: Hemer Abubkr Mohamed , Milovic L.J. , Ben Isa Muammar M. , Sharf Abdusalam M. 
Published: June 2023

In order to improve the efficiency of steam boilers in modern power plants, engineers have to use contemporary materials that enable exploitation at higher parameters, primarily operating temperature and pressure, with resistance to different forms of corrosion at the same time. For that purpose, contemporary 9-12Cr martensitic steels, designated P91, P92, E911, VM12-SHC, and SHM12, were developed.
The paper analyzes experimental research on the behavior of commercial ferritic steel P91 samples. Behavior data on the heat affect zone (HAZ) of welded joints were obtained by testing smooth specimens produced by simulation of the new material welding. A survey of testing hardness and tensile properties is given and images of the fracture surfaces of the samples were processed. Image analysis with ImagePro Plus confirmed experimental testing results for the grain size measured by the circle method and a comparative relationship between the percentage of carbides, precipitates, and lamellar diameters with respect to temperature is provided. The material that was PWHT (post-weld heat treatment) has the highest mean value of lamellar diameter, which indicates increased toughness and decreased hardness compared to BM and material without PWHT i.e (The higher lamellar diameter, the smaller material hardness).
Evaluation of Stryphnodendron polyphyllum (Mart.) pollen as antioxidant and antibacterial potential
Authors: Oliveira Albuquerque Rafael Nogueira , Martins Carlos Henrique Gomes , Souza Jonathan Henrique , Sacramento Verônica de Melo , Oliveira Dario Alves de , Melo-Júnior Afrânio Farias de , Souza Elytania Veiga , Fernandes Souza Luciano , Royo Vanessa de Andrade 
Published: June 2023

El polen de Stryphnodendron polyphyllum (Mart.), típicamente conocido como barbatimão, es un problema para los apicultores con apiarios cerca de la planta, debido a toxicidad del polen para las abejas. El objetivo fue evaluar la actividad antioxidante, antibacteriana, determinar fenoles totales y taninos en el extracto etanólico. La actividad antioxidante se evaluó por método DPPH. La actividad antibacteriana se realizó por método de microdilución. Los taninos totales y fenoles se determinaron por método espectrofotométrico. Tuvimos resultados con actividad inhibitoria y bactericida para Escherichia coli, Pseudomonas aeruginosa, Streptococcus mutans, Streptococcus sobrinus, Streptococcus sanguinis, Streptococcus salivarius y Lactobacillus paracasei. Se determinó EC50 de 7.42mg/mL en la actividad antioxidante. Para compuestos fenólicos y tánicos los resultados comparados con la curva de calibración son 3,12±0,005g/100g de muestra expresados como ácido gálico y 7,3±0,03g/100g de muestra expresados como ácido tánico.

Pollen from the Stryphnodendron polyphyllum (Mart.), typically known as barbatimão, is a problem for beekeepers who have apiaries close to the plant, due to pollen toxicity for bees. The objective was to evaluate the antioxidant, antibacterial activity, determine the total phenols and tannins present in the ethanolic extract. Antioxidant activity was evaluated by the DPPH method. Antibacterial activity was performed by the microdilution method.Total tannins and phenols were determined by the spectrophotometric method. We had results with inhibitory and bactericidal activity for Escherichia coli, Pseudomonas aeruginosa, Streptococcus mutans, Streptococcus sobrinus, Streptococcus sanguinis, Streptococcus salivarius and Lactobacillus paracasei. It was determined EC50 of 7.42mg/mL in the antioxidant activity. For phenolic and tannic compounds the results compared to the calibration curve are 3.12±0.005g/100g of sample expressed as gallic acid and 7.3±0.03g/100g of sample expressed as tannic acid.
Planejamento, programação e controle da produção na indústria
Authors: Nogueira Nelrian de Brito , Roberto José Carlos Alves , Souto Sistina Pereira , De Lima Orlem Pinheiro , De Araújo Paulo César Diniz 
Published: June 2023

O PPCP é uma ferramenta utilizada para acompanhar todas as atividades necessárias para que uma empresa transforme os insumos em produtos, atendendo aos pedidos realizados pelos clientes. O planejamento e controle da produção é uma área central na administração das empresas manufatureiras. Sobretudo quando a produção se efetua por lotes ou em pequenas séries, seja para encomendas, seja para estoque, a programação tem que atender a objetivos conflitantes, devendo entregar todas as ordens de produção no prazo prometido, ao mesmo tempo que mantém as máquinas e os homens ocupados a plena capacidade e minimiza os níveis de estoques de materiais e produtos em fase de processamento. O sistema de produção enxuta foi criado no Japão pela empresa Toyota a qual inseriu em sua metodologia a ergonomia. O sucesso do toyotismo se baseia na predominância da ergonomia em seu sistema de produção que nada mais é do que o bem-estar dos seus empregados que consequentemente trabalham mais motivados gerando mais produtividade e eficiência em seus produtos produzidos demonstrando que a ergonomia melhora a condição de trabalho humano e com isso aumenta a produtividade. Os modelos de produção taylorista/fordista não são tão produtivos quanto o modelo de produção enxuta, pois possuem perdas ergonômicas acarretadas pelo seu sistema de produção baseado nos ideais tayloristas como, por exemplo, os trabalhos repetitivos e monotonos que podem prejudicar a saúde dos trabalhadores e a sua produtividade. No modelo fordista, o pioneiro da na produção automobilística, era um modelo de produção em massa onde os funcionários sofriam maus tratos e trabalho quase escravo. Nesses sistemas de produção a saúde dos funcionários era esquecida e a importância era somente a corrida pela produtividade.
The Role of Teaching and Learning Theories in Preparing Student Teachers to Teach Mathematics and Enhancing Learners' Readiness to Learn: A Case Study of Bia Lamplighter College of Education in Ghana
Authors: Adams Alfred Kofi , Asemnor Felix 
Published: June 2023

Aim: The study aimed to investigate the role of teaching and learning theories in preparing teachers to teach mathematics and in enhancing students' readiness to learn. Specifically, the study explored the application of constructivist and pedagogical content knowledge (PCK) theories in a teacher preparation program and in classroom instruction.
Study Design: The study employed a case study design and involved pre-service teachers and their students in a mathematics classroom. Data was collected through interviews, observations, and document analysis.
Methodology: The study employed a case study design to investigate the application of constructivist and PCK theories in a teacher preparation program and in classroom instruction. The study involved pre-service teachers and their students in a mathematics classroom. A purposive sampling technique was used to select ten (10) final year student teachers who can provide rich and detailed information about their readiness to teach and learn mathematics, as well as their understanding and application of learning and teaching theories. Also, one hundred (100) students were purposively selected for the study. Data was collected through interviews, observations, and document analysis and was analyzed using thematic analysis.
Results: The findings revealed that pre-service teachers who were exposed to constructivist and PCK-based instruction in their teacher preparation program were better equipped to design and deliver mathematics lessons that promote active learning and deep understanding of mathematical concepts. Moreover, students who were taught in a constructivist and PCK-based learning environment demonstrated higher levels of readiness to learn mathematics. The study provides insights into the effectiveness of using learning and teaching theories in mathematics education and highlights the importance of incorporating these theories in teacher preparation programs.
Conclusions: Based on the findings and analysis of this study, it can be concluded that the application of constructivist and PCK-based instruction in mathematics teacher preparation programs has a positive impact on pre-service teachers' readiness to teach mathematics.
To successfully incorporate constructivist and PCK-based instruction in mathematics teacher preparation programs, it is important to provide adequate support and training for instructors and to engage in ongoing evaluation and refinement of these programs. By doing so, we can help to ensure that future mathematics teachers are prepared to effectively facilitate learning and promote mathematical understanding in their classrooms.
A Vision toward Regenerative Organic Agriculture to Sustain Climate Change and Combat Global Warming
Authors: Banerjee Shubhanjali , Verma Shivani , Regmi Rabin , Kaushal Shilpa 
Published: June 2023

Regenerative Agriculture (RA) could be considered as a part of acquiring and maintaining sustainability. RA depends on Sustainable Development Goals (SDGs) for functioning and enhancements related to all kinds of natural resources. The existence of Air and Water Quality Acts and capitalizing on the benefits of the soil-water-air nexus depends on implementing a "Soil Quality Act". The rate of the annual increase in soil C is only transient, even if soil organic matter rises as a result of better management. The rate of carbon accumulation slows as a new equilibrium is reached. Under cultivation at a lower level than a natural vegetative cover. Most intergovernmental panel on climate change (Intergovernmental Panel on Climate Change) scenarios incorporate net-negative emission technologies to maintain global warming to a maximum of 1.5°C, over pre-industrial levels given present trends in greenhouse gas emissions. Vermicompost has proven to be a "miracle plant growth enhancer". It promotes 30-40% over chemical and organic fertilizers and protects plants from pests and diseases. Studies have shown that composting earthworm waste significantly reduces total greenhouse gas emissions in the form of CO2 equivalents, especially nitrous oxide (N2O), which is 296-310 times greenhouse gas than CO2. The study showed that the vermicomposting system emitted an average of 463 CO2-e/m2/h. This is significantly less than the landfill emissions of 3640 CO2-e /m2 /h. Vermicomposting released at least N2O – 1.17 mg/m2/h compared to aerobic and anaerobic compost (1.48 and 1.59 mg/m2/h, respectively). Therefore, earthworms can play a good role in greenhouse gas reduction and mitigation strategies in municipal solid waste disposal. Organic systems show a nearly 30% increase in soil carbon over 27 years.
An Economic Analysis of Climate Change in Dry Lands of Maduri District, Tamil Nadu, India
Authors: Amarnath J. S. , Yogitha P. , Sivasankari B. 
Published: June 2023

The study was conducted in dry lands of Madurai district with a sample size of 150 to study the vulnerability, resilience and adaptation strategies to climate change and also to assess the sustainability of dry land farming and livelihood security of dry land farmers. The results revealed that Thirumangalam block was highly vulnerable to climate change with the index value of 0.689. In ecological sustainability, sorghum was more sustainable. Economic viability analyses showed that cotton was more sustainable The dependency on local inputs was higher for both cotton and sorghum with comparative higher usage of local inputs, such as labour, seed and Farm Yard Manure. Migration percentage was relatively high in dry land agro ecosystem due to low employment generation in this system. Thus, the resilience analysis showed that the migration has to be checked, savings has to be enhanced. Farm Yard Manure was the most important green technology adopted by the farmers with a proportion of 50.00 per cent. The livelihood security analyses that farmers in dry land system were much secure in habitat and social network security. Farmers’ perceived decline in yield was the most important impact of climate change and labour shortage was the most important constraint in adoption of climate resilient technologies. Policy implication suggested include suitable technological interventions should be given to sorghum farmers to make the crop more economically viable. Government should initiate agricultural development and welfare programmes for dryland farmers in the region.
Compounded Biological Soil Conditioner for Soybean Crop Production at Brazil
Authors: Bacilieri Fernando S. , Nichio Bruno , Lemes Ernane M. , Gurski Bruno C. 
Published: June 2023

Aim: To evaluate the agronomic efficiency of Bacillus-based soil conditioner on soybean crop development and productivity in different cropping areas.
Study Design: Randomized complete block design with six treatments and eight replications.
Place and Duration of Study: Municipalities of Uberlândia, Paracatú, Araxá and Guarda Mor, all in Minas Gerais State, Brazil, during the 2019/20 season.
Methodology: The treatments consisted of untreated control, 300 kg ha-1 of mineral fertilizer, 2.0, 2.5, 3.0, 3.5 L ton-1 of Bacillus-based soil conditioner applied to mineral fertilizer (BSC2.0; BSC2.5; BSC3.0; BSC3.5). Leaf and grain P and K concentration, soybean yield components (grains per pod, pods per plant, weight of a thousand grains) and grain yield were evaluated. Data were subject to ANOVA at P = 0.10. Treatments means were separated using the Duncan test at a 0.10 level of significance.
Results: The biological soil conditioner (BSC) had a statistically superior response than mineral fertilizer in all evaluated doses. In Uberlândia, the BSC2.0 treatment was more efficient in increasing the foliar P concentration in soybean. In Araxá, BSC3.0 provided greater grain yield, as it increased the number of pods per plant and soybean yield. BSC3.5 obtained higher grain yield in Paracatú and Guarda Mor. The average soybean yield achieved in all areas was higher than that obtained in the state of Minas Gerais.
Conclusion: This study revealed that using Bacillus-based soil conditioner on soybean crops is a valuable strategy to increase the soil activity, development and crop yield.
Effect of a Continuous Bedside Pressure Mapping System for Reducing Interface Pressures
Authors: Ho Chester , Ocampo Wrechelle , Southern Danielle A. , Sola Darlene , Baylis Barry , Conly John M. , Hogan David B. , Kaufman Jaime , Stelfox Henry Thomas , Ghali William A. 
Published: June 2023

ImportanceContinuous bedside pressure mapping (CBPM) technology can assist in detecting skin areas with excessive interface pressure and inform efficient patient repositioning to prevent the development of pressure injuries (PI).ObjectiveTo evaluate the efficacy of CBPM technology in reducing interface pressure and the incidence of PIs.Design, Setting, and ParticipantsThis parallel, 2-group randomized clinical trial was performed at a tertiary acute care center. The study started to enroll participants in December 2014 and was completed in May 2018. Participants included adults partially or completely dependent for bed mobility. Statistical analysis was performed from September 2018 to December 2022.InterventionNursing staff using visual feedback from CBPM technology for 72 hours.Main Outcomes and MeasuresAbsolute number of sensing points with pressure readings greater than 40 mm Hg, mean interface pressure across all sensing points under a patient’s body, proportion of participants who had pressure readings greater than 40 mm Hg, and pressure-related skin and soft tissue changes.ResultsThere were 678 patients recruited. After attrition, 260 allocated to the control group (151 [58.1%] male; mean [SD] age, 61.9 [18.5] years) and 247 in the intervention group (147 [59.5%] male; mean [SD] age, 63.6 [18.1] years) were included in analyses. The absolute number of sensing points with pressures greater than 40 mm Hg were 11 033 in the control group vs 9314 in the intervention group (P = .16). The mean (SD) interface pressure was 6.80 (1.63) mm Hg in the control group vs 6.62 (1.51) mm Hg in the intervention group (P = .18). The proportion of participants who had pressure readings greater than 40 mm Hg was 99.6% in both the control and intervention groups.Conclusions and RelevanceIn this randomized clinical trial to evaluate the efficacy of CBPM technology in the reduction of interface pressure and the incidence of PIs in a tertiary acute care center, no statistically significant benefit was seen for any of the primary outcomes. These results suggest that longer duration of monitoring and adequately powered studies where CBPM feedback is integrated into a multifaceted intervention to prevent PI are needed.Trial RegistrationClinicalTrials.gov Identifier: NCT02325388
Exploring risk factors for persistent neurocognitive sequelae after hospitalization for COVID‐19
Authors: Ch'en Peter Y. , Gold Laura S. , Lu Qiongshi , Ye Ting , Andrews James S. , Patel Payal 
Published: June 2023

AbstractObjectiveIn this study of patients hospitalized during acute SARS‐CoV2 infection with 6‐months of follow‐up data, we identified risk factors associated with the development of neuro‐PASC.MethodsWe conducted an exploratory, observational single‐center cohort study of patients hospitalized for COVID‐19 from November 2020 to March 2022. Our primary outcome was persistent neurocognitive symptoms, defined as fatigue, headache, loss of taste/smell, brain fog, confusion, concentration/memory/word finding difficulty, and/or change in speech present at 1‐month and persisting for 6‐months following acute SARS‐CoV2 infection. Secondary outcomes included persistent impairment scores on PROMIS cognitive function and abilities scales. Multivariate logistic regression analyses identified potential risk factors for neuro‐PASC.ResultsOf 89 participants, 60% reported persistent neurocognitive symptoms at 6‐months; fatigue was the most prevalent, occurring in 53% of participants, followed by brain fog in 34% of participants.Lower self‐reported socioeconomic status and increased pre‐COVID‐19 anxiety scores on the Hospital Anxiety and Depression Scale were associated with increased odds of developing persistent neurocognitive symptoms. Being female and of Hispanic descent were associated with increased odds of persistent cognitive function and ability impairment.InterpretationSociodemographic factors and pre‐COVID‐19 anxiety symptoms may be important risk factors for neuro‐PASC. These findings underscore the need to assess various sociodemographic factors in research on PASC. Our study also highlights premorbid mental health symptoms as a potential predictor of persistent neurocognitive symptoms following hospitalization with SARS‐CoV2 infection.