bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANALISIS KEMAMPUAN SELF HEALING PADA LAPIS ASPAL BETON DENGAN LIMBAH BUBUTAN BAJA SEBAGAI BAHAN TAMBAH
Authors: Saputra Alida Danar , Tajudin Anissa Noor 
Published: December 2021

Steel waste is waste generated from a large or small amount of steel production process. The results of steel waste disposal can pollute the environment if not done a good treatment and countermeasure so that it has value benefits. This study uses steel lathe waste additives to determine the self-healing ability of asphalt in the AC-WC mixture. Steel lathe waste used with varying degrees of steel lathe 0%, 0,25%, 0,5%, 0,75%, 1% and asphalt content used by 5,5%. After obtaining the data used in the study, samples were made for asphalt mixtures with varying degrees. Then the finished sample is divided into 4 parts to be tested for temperature rise on each steel lathe mixture using a thermal camera. And tested using a threepoint bending test to determine the ability of asphalt selfhealing in the AC-WC mixture that occurs for 5 cycles with a heating duration of 20 seconds, 40 seconds, 60 seconds. From the results of the research on the content of a mixture of 0% steel lathe proved the sample can do self-healing but the results obtained are not as good as when using variations in the added ingredients of steel fiber mixture 0,25%, 0,5%, 0,75% and 1%. ABSTRAKLimbah baja adalah buangan yang dihasilkan dari suatu proses produksi baja baik dalam jumlah yang besar atau sedikit. Hasil buangan limbah baja dapat mecemari lingkungan apabila tidak dilakukan pengolahan dan penanggulangan yang baik sehingga memiliki nilai manfaat. Penelitian ini menggunakan bahan tambahan limbah bubutan baja untuk dapat mengetahui kemampuan self healing aspal pada campuran AC-WC. Limbah bubutan baja yang digunakan dengan kadar variasi bubutan baja 0%, 0,25%, 0,5%, 0,75%, 1% dan kadar aspal yang dipakai sebesar 5,5%. Setelah didapatkan data yang dipakai dalam penelitian dilakukan pembuatan sampel terhadap campuran aspal dengan variasi kadar. Kemudian sampel yang telah jadi di belah menjadi 4 bagian untuk diuji kenaikan temperatur pada setiap campuran bubutan baja dengan menggunakan kamera thermal. Serta diuji dengan menggunakan alat threepoint bending test untuk mengetahui kemampuan selfhealing aspal pada campuran AC-WC yang terjadi selama 5 siklus dengan durasi pemanasan 20 detik, 40 detik, 60 detik. Dari hasil penelitian pada kadar campuran bubutan baja 0% terbukti sampel dapat melakukan self healing tetapi hasil yang didapatkan tidak sebaik ketika menggunakan variasi bahan tambah campuran serat baja 0,25%, 0,5%, 0,75% dan 1%.
The Effects of Some Physical and Chemical Factors on Apparent Resistivity of Surface Soil in the University of Mosul, Mosul City, Northern Iraq
Authors: Al-Juraisy Bashar A. 
Published: December 2021

Soil resistivity depends on many overlapping factors, which influence it in various ways. The aim of this study was to determine the effects of some physical and chemical factors on soil apparent resistivity. The results of field, laboratory, and statistical studies revealed a complex relationship between water content, pH, and salinity with soil apparent resistivity. The results showed that water content had a clear effect on apparent resistivity, as it increased significantly when water content value decreased to less than about 5%. The results also showed that increasing the salinity ratio at the expense of water content led to an increase in the apparent resistivity values. The apparent resistivity values also increased significantly when pH values ​​fell below about 7.7.
The increase in air temperature caused an increase in water evaporation from the soil, which led to increasing the apparent resistivity. The rise in air temperature also caused an increase in the concentration of salts at the expense of water content; since salts are considered to be insulators, unless they are dissolved in water, they cause an increase in the value of apparent resistivity.
OPTIMIZATION OF THE LAND USE STRUCTURE OF THE POLTVA RIVER BASIN
Authors: Shipka Marianna 
Published: December 2021

Ensuring the ecological sustainability of the territory is possible in the case of the optimal ratio of different types of lands. In particular, it is important to have sufficient areas of eco-stabilizing lands (forests, meadows, protected areas, etc.). Of great importance are the features of land use in coastal areas, areas with high steep slopes and areas with soils susceptible to degradation. Ecologically sustainable land use can reduce the risk of soil degradation processes, provide an optimal microclimate, good hydrological conditions and promote the protection of small rivers.
To provide recommendations for improving the structure of land use in the Poltva river basin, a map of optimization of the structure of land use using the ArсGIS 10.0 program was drawn up. For this purpose, a map of slope steepness was constructed, an interpretation of space images was made to compile a map of land use structure and a map of the soil cover was digitized. As a result of the analysis of the map of land use structure the peculiarities of the ratio of types of lands in different parts of the studied territory by integral indicators are determined. The coefficients of anthropogenic load, ecological stability of land use, ecological stability of landscapes, ecological balance and others are calculated. Areas with different degrees of anthropogenic transformation of lands are identified. The relationship between the peculiarities of natural conditions (geological structure, relief, soil cover) and land use of the territory is analyzed.
As a result of overlapping maps of slope steepness, soil cover and land use, areas with different risk of soil degradation processes and plowed coastal areas were identified. The map of land use structure optimization is compiled according to the method of allocation of ecological and technological groups of lands. According to this technique, lands are differentiated by the steepness of the slopes.
The proposed optimization of land use involves the use of phytomeliorative and agrotechnical measures: plowing across the slope, soil-protective crop rotations, the creation of forest belts, land conservation, etc. Recommended optimization measures include the withdrawal from agricultural cultivation of peatlands, steep slopes, floodplains, hollows, coastal protection zones of rivers and streams. The implementation of the proposed optimization measures will reduce plowing, increase the share of eco-stabilizing lands and improve the integral indicators characterizing the ratio of different types of lands. A compiled map of land use structure optimization can be used for land management and environmental activities.
Key words: anthropogenic load, land use, ecological and technological groups of lands, river basin, optimization, Bug river.
Les fake news et le croire chrétien en milieux africains. Approche d’un phénomène médiatique et sociopolitique
Authors: Mukulu Mbangi Sylvain 
Published: December 2021

Cette étude veut répondre à une préoccupation : savoir contextualiser tout discours théologique. En ce sens, elle s’attèle sur les enjeux du croire chrétien dans un monde marqué les infox. Tout en établissant dès le départ que l’existence des fausses nouvelles est intrinsèquement liée à l’humanité, mais que de nos jours, leur viralité est concomitante de l’évolution du numérique, les exemples analysés dans cet article montrent que les fake news demeurent également en Afrique un phénomène sociopolitique et médiatique aux impacts multiples. C’est dans ce cadre des enjeux de la foi en Afrique face aux fausses nouvelles que l’étude examine la richesse symbolique de la tradition chrétienne pour nommer le faux et sa conception de la vérité avant de formuler, dans une perspective œcuménique et interreligieuse, des pistes de réflexion pour la foi comme acte de discernement dans sa rencontre avec les fake news.
Efficacy of flipped classroom method in teaching-learning physiology
Authors: Patkar Kshitija Umesh , Patkar Umesh Suresh , Kolte Vrunda Subhash 
Published: December 2021

Objectives:
The overall goal of the study was to foster self-directed learning, critical thinking and problem-solving skills in 1st-year medical students. Another goal was to create interest in learning by making it more interactive. As per the requirement of a competency-based medical education curriculum, we tried to use a novel teaching method called Flipped classroom method to meet our goals. Hence, the objectives of this study were: (1) To compare the effect of flipped classroom method and didactic lecture on students’ performance in the topics from renal physiology by MCQ test. (2) To obtain students’ perception about flipped classroom method in learning physiology. (3) To obtain teachers’ perception about flipped classroom method in teaching physiology.

Materials and Methods:
Flipped classroom method was introduced for teaching two topics in renal physiology for first MBBS students. This cross-over experimental study included 112 first M.B.B.S. students, after taking their informed consent and Ethics Committee permission. They were divided into two groups according to odd and even roll numbers. In the first part of the study, Group A (odd roll numbers) attended the didactic lecture on Renal Clearance (RC) and Group B (even roll numbers) attended the didactic lecture on Glomerular Filtration Rate (GFR). These topics were taught by two different teachers in two different classrooms. They were administered pre-test and post-test in the form of case-based MCQs which tests knowledge, critical thinking, and problem-solving skills on the topic. In the second part, two groups were swapped. Group A attended flipped class for G.F.R. and Group B attended flipped class for RC. They were again administered pre-test and post-test in the form of the same MCQ test. The teacher remained the same for the particular topic. For the flipped class, students came prepared with the topic. They were provided with resource materials of the allotted topic 1 week prior, in the form of pre-recorded lectures and videos. Students’ feedback in the form of a questionnaire and teachers’ feedback in the form of the interview was obtained. Marks obtained by students after didactic teaching and flipped classroom method teaching were compared by “Student’s t-test.”

Results:
The post-test score of students in the flipped class was significantly higher (P < 0.05) than the post-test score of students in didactic class. More than 85% of students agreed and strongly agreed that the flipped classroom method improved their learning in renal physiology and it increased their confidence in answering the topic in the final exam. Near about 50% of students liked the flipped class method because of its interactive nature and discussion which was based on the application of knowledge. The teachers were more satisfied by flipped classroom method of teaching.

Conclusion:
Flipped classroom method is an effective teaching-learning method in physiology when compared with a didactic lecture.
Angiogenesis-modulating properties of ethanolic extract of Ferula assa-foetida oleo-gum-resin
Authors: Yazdanipour Nahid , Khorashadizadeh Mohsen , Sarab Gholamreza Anani 
Published: December 2021

Objectives:
Angiogenesis has been known to have a critical role in the tumour growth. Different studies indicated that angiogenesis was stimulated by hypoxia. In the present study, we assessed the anti-angiogenesis activity of ethanolic extract of Ferula assa-foetida (EEFA) on hypoxic-induced human umbilical vein endothelial cells (HUVECs).

Materials and Methods:
The F. assa-foetida gum extract was characterised by total phenolic contents (TPC) and total flavonoids content (TFC). The active compounds of EEFA were determined by high-performance liquid chromatography (HPLC). Then, cytotoxic effects of EEFA on the growth of HUVECs were assessed using MTT assay, wound healing and cell cycle analysis. The expression of Vascular endothelial growth factor (VEGF), Akt,HIF-1, VEGF receptor 1 (VEGFR-1) and VEGFR-2 genes was also quantified by Real-Time PCR. GeneMANIA and EnrichR databases were used to predict gene network interactions for the studied genes and their mechanism.

Results:
The TFC and TPC of the extract were 26 mg gallic acid equivalent per gram of extract and 5.45 mg quercetin/g, respectively. HPLC analysis revealed the presence of anti-angiogenic components in EEFA. Our data showed that EEFA had no cytotoxicity effect on HUVECs. The obtained results also indicated that EEFA prevented the proliferation and migration of HUVECs. Expression analysis showed that EEFA significantly decreased the VEGF-A mRNA level in the hypoxia-induced HUVECs. No change was found in the VEGFR-2 gene expression following treatment with EEFA in the HUVECs. However, the significantly upregulation of the VEGFR-1 gene expression was observed in the EEFA-treated HUVECs. The bioinformatics analysis of gene-gene interaction network also showed that the studied genes play an essential role in the regulatory pathways of angiogenesis and cancer.

Conclusion:
These findings provided evidence about the anti-angiogenesis role of EEFA, suggesting that this could be considered in the cancer therapy.
Primary spinal dorsal extramedullary germ cell tumor: A rare case report and literature review
Authors: Vij Mukesh , Bhardwaj Sandeep 
Published: December 2021

Background:
Primary spinal extramedullary germ cell tumor are very rare. Germ cell tumor are similar histologically to germ cells of genital organs and may arise rarely from central and peripheral nervous system.

Case Description:
We report a case of 20-year-old male who presented with progressive lower extremity weakness, spasticity, and numbness of legs. Patient was evaluated with magnetic resonance imaging dorsal spine which revealed extramedullary mass in dorsal (D2-D3) level with severe cord compression. Tumor was found to be extramedullary with histopathology consistent with germ cell tumor. Patient was given radiotherapy and chemotherapy postoperatively.

Conclusion:
Primary spinal extramedullary germ cell tumors are very rare and are very sensitive to radiation and chemotherapy. Various management and treatment protocols are available across institutions in the world. We recommend adequate decompression of cord with biopsy followed by local radiation and chemotherapy. As these are rare tumors, presenting with significant neurological deficits should always be kept in the differential diagnosis.
Role of topical vancomycin in reduction of postoperative infections in head trauma patients: A developing country experience
Authors: Atallah Ahmed , Elbaroody Mohammad , Hassan Ahmed A. Aziz N. , Ali Ahmed M. , Elhawary Mohamed E. 
Published: December 2021

Background:
Postoperative cranial wound infections are a major cause of morbidity, mortality, and financial burden, especially in developing countries.

Methods:
We prospectively studied 86 patients in a randomized trial; 39 patients received one gram of topical vancomycin powder in the subgaleal space while 47 matched control patients did not. Both groups received identical intraoperative and post-operative care. The primary outcome variable was the postoperative wound infections rate factored by cohort. Secondary outcomes were the timing of infection and the rate of adverse events.

Results:
Adding topical vancomycin was associated with a significantly lower rate of infection than the standard of care alone (2.6% [1/39] vs. 14.9% [7/47], P =.004). No adverse reactions occurred.

Conclusion:
Topical vancomycin is safe, and effective in the prevention of surgical site infections following craniotomy. These findings have broad consequences for neurosurgery practice, especially in developing countries with high incidence of head trauma.
Posterior resection of sacral osteosarcoma utilizing cement-infused chest tube interbody reconstruction and lumbopelvic fusion
Authors: Carpenter Amanda M. , Iqbal M. Omar , Majmundar Neil , Chiappetta Gino , Danish Shabbar , Sonntag Volker 
Published: December 2021

Background:
Primary osteosarcoma (OS) of the spine is very rare. En bloc resection of spinal OS is challenging due to anatomical constraints. Surgical planning must balance the benefits of en bloc resection with its potential risks of causing a significant neurological deficit. In this case, we successfully performed a posterior-only approach for decompression with S1 reconstruction via a cement-infused chest tube interbody device, along with a navigated L4 to pelvis fusion.

Case Description:
A 49-year-old female presented with a primary sacral OS. Computed tomography (CT) and magnetic resonance (MR) imaging revealed an S1 lytic vertebral body lesion with severe stenosis and progressive L5 on S1 anterior subluxation. Surgical decompression with tumor resection and S1 corpectomy with S1 reconstruction via a cement-infused 32-French chest tube interbody device accompanied by L4 -pelvis fusion utilizing S2-alar-iliac screws was completed. 6 months postoperatively, the patient continues to have significant pain relief and the instrumentation remains intact.

Conclusion:
A 49-year-old female with an S1 OS successfully underwent a posterior-only approach that included an S1 corpectomy with anterior column reconstruction via a cement-infused chest tube interbody plus a navigated L4 to pelvis fusion.
Simulation of an Advanced Geothermal Energy Conversion Plant in Perú
Authors: Chauca Paredes Sofia , Rojas García Graciela , Porto Power George 
Published: December 2021

This investigation aims to simulate an efficient plant that generates energy through a solar-geothermal hybrid energy conversion system with supercritical steam, Therminol VP1, geothermal fluid and R134a refrigerant. The goal is to exemplify a hybrid solution that optimizes and takes advantage of the existing properties of the solar and geothermal power cycles. The geothermal part of the process, the primary cycle, is augmented by the solar thermal cycle to obtain a high-efficiency result. In addition, it allows the reader to understand the ideal process of this type of plant and a thermodynamic analysis represented by creating a detailed model block flow diagram, which is then turned into a dynamic one used to examine the selected parameters such as temperature, flow rate, and pressure variations. The dynamic model approximated the thermal values of the heat exchangers and the working fluids in the exchangers, solar collectors, piping and in the storage tanks.
Eksistensi Perempuan dalam Novel Guru Aini Karya Andrea Hirata: Kajian Feminisme Eksistensial
Authors: Meiferawati Ariskadyani 
Published: December 2021

This paper analyzes the existence of women’s existence in Andrea Hirata’s Guru Aini. This study aims to determine the existence of women in the novel. This is a descriptive qualitative research with existential feminism approach. The writer analyzes the data obtained by identifying, classifying, describing and drawing conclusions. It can be concluded in this study that there are several texts that include words and sentences which indicate the female character named Desi in the novel is able to bring out her existence as a female figure in the novel.Abstrak Tulisan ini menganalisis eksistensi perempuan dalam novel Guru Aini karya Andrea Hirata. Penelitian ini bertujuan mengetahui eksistensi perempuan dalam novel tersebut. Penelitian ini merupakan penelitian deskriptif kualitatif dengan pendekatan feminimisme eksistensial. Penulis menganalisis data yang didapat dengan cara mengidentifikasi, mengklasifikasi, menguraikan, dan menarik kesimpulan. Ditemukan beberapa teks yang meliputi kata dan kalimat yang menunjukkan bahwa tokoh perempuan bernama Desi pada novel tersebut mampu memunculkan eksistensiya sebagai sosok perempuan.
Особливості взаємодії магнітно-абразивного інструменту з оброблюваною поверхнею в умовах кільцевої ванни
Authors: Майборода Віктор Станіславович , Заставський Костянтин Олегович , Жук Роман Борисович 
Published: December 2021

Досліджено особливості поведінки магнітно-абразивного інструменту (МАІ) і характер зміни сил переважно фрикційного походження, що виникають під час магнітно-абразивної обробки (МАО) циліндричних зразків діаметром 16 мм, виготовлених з феро-, пара- і діамагнітних матеріалів, що виникають у робочих зазорах кільцевого типу шириною 35 мм залежно від швидкості обертання навколо осі кільцевої ванни в діапазоні 100–300 об/хв, частоти обертання навколо власної осі від 0 до 80 рад/с, при магнітній індукції в зонах обробки 0,18 і 0,25 Тл, магнітно-абразивних порошкових матеріалів різного типу та розміру. Показано, що величина ефективного моменту тертя змінюється в діапазоні від 0 до 1,4 Нм. Ідентифіковано три області технологічних умов МАО: 1) область формування квазістійкого магнітно-абразивного інструменту; 2) область стабільно сформованого МАІ; 3) область з аномальним зростанням / падінням сил тертя. Аналіз отриманих закономірностей дозволив ідентифікувати процеси, пов’язані з особливостями поведінки частинок МАІ в процесі МАО при безпосередньому контакті з робочою поверхнею, а також умови утворення зон заклинювання, що виникають між полюсними наконечниками і поверхнею деталей. Показано, що використання порошків з округлою формою частинок при МАО в зазначених вище умовах обробки забезпечує переважне пластичне деформування поверхневого шару зразків з пара- і діамагнітних матеріалів. Найбільше на зміну сил фрикційного походження впливає зростання розміру частинок магнітно-абразивних порошків. Вплив зміни сил магнітного поля в досліджуваному діапазоні несуттєвий.
Комплексний алгоритм створення керуючих автоматів на базі машинного навчання
Authors: Козак Євген Борисович 
Published: December 2021

У статті досліджено комплексний алгоритм створення керуючих автоматів на базі машинного навчання. Розкрито необхідність застосування принципів машинного навчання на керуючих автоматах. Описано генезис автоматів навчання та їх приналежність до штучного інтелекту. Визначено принципи побудови машини Цетліна та перспективні напрями її застосування щодо умов дослідження. Наголошено, що алгоритм навчання керуючого автомата використовує дискретні етапи оновлення, застосовуючи лінійну тактику, це, у свою чергу, дозволяє обмежити алгоритм кінцевою кількістю станів, визначених ансамблем автоматів Цетліна. Визначено умови, якими керується принцип оновлення автомата: значення літералів, параметри та поточні дії автоматів Цетліна з точки зору включення та виключення. Запропоновано основну архітектуру машинного класифікатора Цетліна з двома пунктами та наголошено, що ефективність машинного навчання з використанням автоматів навчання залежить від ряду гіперпараметрів, які необхідно ретельно налаштувати перед тренуванням. Процес налаштування точності та збіжності для цієї задачі називається пошуком гіперпараметрів. Обґрунтовано застосування принципу максимального паралелізму для машинної реалізації автоматів навчання Цетліна. Визначено метод бінаризації із замкнутим циклом зі зворотним зв’язком щодо точності, який ігнорує статистичну значущість даних, яка визначає, як класи виведення висновків співвідносяться з набором даних. Наведено діаграму потоку даних методу бінаризації, який орієнтовано на значущість. Описаний метод організований у три етапи: етап 1 (зменшення розмірності), етап 2 (класифікація), етап 3 (двійкове кодування). Запропоновано схематично логічну реалізацію програмування керуючого автомата. Визначено перспективи подальших досліджень, які ґрунтуються на розробці масштабованої апаратної архітектури.