bluuebunny/crossref_metadata_2025_split huggingface dataset:
SIMULATION OF WEAR OF THE CHRISTMAS TREE CHOKE ELEMENTS
Authors: Fedorovych Ya. T. , Liakh M. M. , Mykhailiuk V. V. , Deineha R. O. , Koval B. I. 
Published: August 2019

The effectiveness of the use of machinery and equipment in the oil and gas industry is impossible without solving the problems associated with improving the wear resistance of their components and parts.
One of the types of equipment that is subject to intensive wear is the elements of the gushing fittings (valves, chokes, etc.). During operation, the throttle locking elements (tip and nozzle) are subject to the destructive influence of the working environment, as a result of which hydro and gas-dynamic wear of the tip and nozzle occurs. As a result, it becomes impossible to control the flow of a well.
The aim of the work is to use simulation modeling to study the wear process of the elements of the choke of the Christmas tree fittings to determine the areas that are the most worn, taking into account the size of abrasive particles in the gas stream.
According to the results of simulation, it was found that the size and place of maximum wear of the throttle elements is different, depending on the size of the grains of sand. The amount of wear on the throttle tip is 15 mm/year, and most of all, it is not the tip that wears, but the nozzle (46 mm / year). It was also found that the amount of wear of the surfaces located in front of the nozzle, compared with the wear of the tip and the nozzle, is much less, and is 3 mm/year.
Based on the above simulation algorithm and the obtained results, the model of an adjustable choke can later serve as a basis for its subsequent research, namely: optimizing the tip cone to reduce the amount of wear of the tip itself; studies of the effect of speed and pressure drop on the amount of wear of the throttle elements; design optimization.
RESEARCH OF AXIAL FORCE AND THE TORQUE ACTION ON A DRILL STRING AT ROTARY AND COMBINED DRILLING METHODS
Authors: Hrydzhuk Ya. S. 
Published: August 2019

The estimation approach of the work performed by the main force factors acting on the drill string, rotary and combined drilling methods, was proposed. The problem of obtaining analytical functions of force factors action for a mechanical system with distributed parameters was formulated.
To solve the problem, the axial load and torque functions of the drill string analysis was performed, depending on the alternating parameter - the well depth. By integrating these functions, analytical dependencies were established for determining the axial load and torque acting on the drill string in sections of directional and S-shaped wells. Relying on industrial data, numerical calculations of the size of work on sections of such wells were carried out. The obtained research results can be further used to find energy-saving modes of the drill string.
Using Attapulgite as a Lightweight Aggregate to Produce Structural and Insulating Concrete
Authors: Hammad Hind Hussein , Mohamed Zeyad Momtaz , Rasheed Tmara 
Published: August 2019

The wide spread of lightweight concrete due to its properties like low density, good thermal insulation, and the economic feasibility of low cost for buildings constructed with this type of concrete. The studies in this field of construction materials have varied, in this research, one types of the lightweight concrete was produced. It is a lightweight aggregate concrete. Crushed attapulgite rocks was used as aggregate which fired at temperature of 700°C and used as partially or completely replacement with ordinary aggregates to production low-density concrete blocks both structural and insulating, The properties of the concrete produced which tested for (density, compressive strength, thermal conductivity, linear shrinkage, splitting strength) is conformed to the requirements of international specifications, the mix (GP) which contain 50% fine attapulgite aggregate and 50% ordinary fine aggregate with 100% coarse attapulgite aggregate conforms to the properties of structural lightweight concrete according to ASTM C330 and its gave a density about 1668Kg/m3 and compression strength of 17.5 N/mm2, while the two mixtures (H, HP) consisting of fine and coarse attapulgite aggregate with 100% of the total aggregate in mixture, with weight of 10% from cement as a pozzolana material in the mix HP is identical to the properties of the insulating lightweight aggregate concrete according to ASTM C332 with density about (1380,1432)Kg/m3 and thermal insulation (0.37,0.41)w/mk°, respectively.
Мультифакторный анализ профессионально важных качеств при компьютерной психодиагностике оперативного персонала АЭС
Authors: Бондарович Павел , Сагайдак Светлана 
Published: August 2019

Цель. Разработка компьютерной психодиагностической программы объективной оценки профессионально важных качеств оперативного персонала с целью учета человеческого фактора для повышения безопасности эксплуатации атомных электростанций.
Методы. Теория системной психофизиологии. Компьютерное психологическое тестирование. Методы программного обеспечения экспериментальной процедуры психологического исследования. Методы математической статистики. Сравнительный анализ данных компьютерного психологического тестирования.
Результаты. Установлены закономерности влияния психофизиологических особенностей индивида на успешность выполнения профессиональных обязанностей (оперативных действий). В результате работы сформированы группы нейропсихологических и психофизиологических параметров с точки зрения прогноза поведенческих проявлений по критериям работоспособности, стрессоустойчивости, фукнциональной подвижности. Разработан и изготовлен психофизиологический компьютеризованный инструментарий для исследования профессионально важных характеристик оперативного персонала АЭС. Разработаны экспериментальная диагностическая процедура прогноза психофизиологического соответствия и алгоритм формирования рекомендаций по результатам комплексной диагностики. Разработаны рекомендации для модернизации программы психологической диагностики оперативного персонала АЭС. Внедрение и практическое использование рекомендаций позволяет повысить объективность при прогнозировании успешности профессиональной деятельности операторов АЭС на основании оценки результатов автоматизированного компьютерного психологического тестирования.
Область применения исследований. Представленные результаты исследований получены в области психодиагностики профессионально важных качеств операторов атомных электростанций и могут быть использованы при прогнозе результативности и надежности их профессиональной деятельности. Компьютерная программа психологического тестирования, созданная с использованием полученных результатов исследования, может применяться при психофизиологическом обследовании оперативного персонала АЭС как основная или дополнительная методика оценки профессионально важных качеств при отборе кандидатов и кадровой работе с персоналом АЭС. Рекомендации на основании результатов тестирования могут быть использованы в целях оптимизации программ повышения и поддержания квалификации, подготовки на должность.
Применение физических упражнений СДК «Атлет» для подготовки будущих спасателей к профессиональной деятельности
Authors: Чумила Евгений , Бабич Виталий , Маркач Игорь , Федькович Виталий , Шашок Илья 
Published: August 2019

Цель. Научное обоснование повышения уровня общей и специальной физической подготовленности спасателей на основе применения упражнений спортивно-диагностического комплекса «Атлет» (СДК «Атлет»).
Методы. Использованы следующие методы исследования: анализ специальной научно-методической литературы, анкетный опрос, педагогические наблюдения, контрольно-педагогические испытания, методы статистического анализа.
Результаты. Представлены нормативные требования и порядок выполнения упражнений, входящих в состав разработанного СДК «Атлет». Проведен педагогический эксперимент, заключающийся в определении эффективности влияния упражнений, входящих в состав комплекса, на уровень общей и специальной физической подготовленности курсантов Университета гражданской защиты МЧС Беларуси. Разработана методика повышения уровня общей, специальной и профессионально-прикладной физической подготовленности будущих спасателей, основанная на применении упражнений СДК «Атлет».
Область применения исследований. Результаты исследований могут быть использованы в системе профессиональной подготовки обучающихся и работников силовых министерств и ведомств как Республики Беларусь, так и иностранных государств.
Análisis espectral y dispersión superficial de detritos suspendidos en la Bahía de Banderas mediante imágenes de satélite
Authors: González-Luna Carlos , , Filonov Anatoliy , Mireles Omar , Tereshchenko Iryna 
Published: August 2019

Gracias a técnicas de colorimetría y métodos de clasificación no supervisada, pueden ser vectorizada y trazada la evolución de contaminantes vertidos en el mar con res- pecto al tiempo y al espacio, lo que, en la práctica, abarata el costo de investigación y permite tener una mayor cobertura espacio-temporal. Este trabajo presenta el caso de estudio de Bahía de Banderas, Jalisco-Nayarit, México, donde se estudió el vertido de detritos por el río Ameca en el periodo 2006-2014 a través de un producto combinado de imágenes LandSat y Modis y con el análisis de las firmas espectrales de las diferentes bandas que presentan estos satélites se infiere los porcentajes de la materia orgánica disuelta en las plumas.
Membangun Pola Hidup Sehat Melalui Pemberdayaan dan Konsumsi Olahan Sayuran Sehat Menuju Desa Sehat Terpadu
Authors: Alifatin Aini , Harini Ririn , Raharjeng Erna Retnaning , Kurnadi Bambang 
Published: August 2019

Tanpa mencerdaskan dan memberdayakan partisipasi dan peran masyarakat, upaya kesehatan sulit memberikan perubahan dan peningkatan kualitas sumber daya manusia. Pengembangan posyandu Balita dan Lansia, peningkatan terhadap ketahanan pangan, peningkatan kesadaran masyarakat dengan kemandirian kader kesehatan, Pembuatan program reward keluarga sehat, Pembentukan sarana edukasi kesehatan melalui warung informasi, memberikan harapan penanaman nilai perilaku hidup bersih dan sehat kepada semua kalangan, adalah kegiatan utama yang dapat meningkatkan kualitas SDM dalam ketahanan kesehatan. Menjadikan tradisi konsumsi sayur melalui posyandu Balita dan Lansia, akan menanamkan pola hidup sehat bagi keluarga. Sayuran organic menjadi daya tarik karena selalu di jadikan bonus bagi peserta yang hadir. Budidaya sumber alam (sayuran organic) selain sebagai unsur peningkatan gizi keluarga, juga mendukung perekonomian dalam bentuk penyadaran mastarakat akan manfaat tanaman organic: budidaya sayuran dan tanaman organic berupa nuggetz sayur, bakso bayam, dan lain-lain. Budidaya tersebut dapat sekaligus meningkatkan perekonomian masyarakat melalui pelatihan packaging, penyimpanan dalam freeser dan pemasaran baik melalui media online, social media maupun menjalin networking dengan badan badan usaha di sekitar. Budidaya sumber alam (sayuran organic) dan pembentukan UMKM inilah yang akan menunjang ekonomi kesehatan keluarga. Desa Komis akan menjadi kawasan sehat, dan sentra pembangunan kesehatan serta peningkatan perekonomian warga sebagai hasil dari PKW Desa Sehat Terpadu.
90 years of PJSC “The Ukrainian Research Institute of Refractories named after A. S. Berezhnoy”
Authors: Martynenko V. V. , Primachenko V. V. , Kaznacheyeva N. M. 
Published: August 2019

The article is devoted to the 90-th anniversary of the founding of PJSC “THE UKRAINIAN RESEARCH INSTITUTE OF REFRACTORIES NAMED AFTER A. S. BEREZHNOY”. At present, the Institute is the only one specialized scientific organization in Ukraine that develops and produces a uniqe, high-tech, competitive refractory products. The review of the developments carried out by the Institute over the last 5 years is presented.
Special vibrocast mullite-siliceous refractories with the given properties for glass melting furnaces
Authors: Martynenko V. V. , Primachenko V. V. , Shulik I. G. , Chaplianko S. V. , Tkachenko L. P. 
Published: August 2019

Technologies have been developed for the production of special vibrocast large-sized mullite-siliceous and mullite-siliceous low-cement refractories with specified properties for the laying of side walls and the bottom of glass melting furnaces and other place of applications. The influence of the amount alumina and calcined kaolin fraction 3—0.5 mm on the properties of mass, raw and firing (at temperatures of 1350, 1400, 1450 оC) samples have been researched, and also the flow at vibration has been studied, stages of structure formation and technological factors, providing qualitative vibrocasting of products, have been determined. The developed mullite-siliceous and mullite-siliceous low-cement refractories in terms of properties fully meet the specified requirements: mass fraction of Al2O3 — 52.58 and 53.83 %, SiO2 — 46.11 and 45.19 %, CaO — 0.09 and 1.12 %, Fe2O3 — 1.10 and 1.06 %; apparent density — 2.21 g/cm3, open porosity — 20.2 and 20.3 %, cold crushing strength — 68 and 69 N/mm2, thermal conductivity (at 400—800 оC) — 1.237—1.637 W/(m ∙ K).
Presentación del Dr. Roberto Esguerra Gutiérrez
Authors: Matijasevic Eugenio 
Published: August 2019

Presentación del Dr. Roberto Esguerra Gutiérrez con motivo de la Primera “Conferencia Dr. Roberto Esguerra Gutiérrez”, dictada durante la inauguración del X Congreso SOLAMI – XXVI Congreso ACMI-ACP, Cartagena 18 de agosto de 2017
Tengo el honor de presentar al doctor Roberto Esguerra Gutiérrez. Honor bastante fácil de cumplir pues el Dr. Esguerra es una figura no solo bien conocida sino también bastante querida por todos aquellos, médicos y pacientes a la par, amigos y colaboradores, que hemos tenido la fortuna de trabajar con él; lo cual equivale, invariablemente, a aprender de él. Así que la presentación será breve
Ruptura espontánea del semitendinoso secundario al uso de una quinolona
Authors: Hennessey Calderón Diana Carolina , Severiche Bueno Diego Fernando 
Published: August 2019

La ruptura espontánea de un tendón secundario al uso de una quinolona es un efecto adverso poco común, pero que con el paso de los años se ha venido documentado con mayor frecuencia. A pesar de lo anterior, aún no hay estudios clínicos que permitan aclarar su fisiopatología, qué estrategias pueden disminuir el riesgo de desarrollar una ruptura espontánea o a qué dosis de las diferentes quinolonas se aumenta el riesgo de presentar una ruptura espontánea. Adicionalmente, varías guías de práctica clínica incentivan el uso de las quinolonas como primera línea para el manejo de infecciones respiratorias o de vías urinarias sin hacer consideraciones sobre este efecto adverso.
Por lo anterior, presentamos a continuación el caso de un paciente de 31 años que posterior al inicio de ciprofloxacina para el manejo de una diarrea aguda presentó una ruptura espontánea del tendón del semitendinoso secundario al uso de la quinolona
Tumor mesenquimal de mediastino
Authors: Gómez-Cerquera Juan Manuel , Cruz Valderrama Estefany Roxana 
Published: August 2019

Varón de 40 años con cuadro clínico de 6 meses de dolor en hemitórax derecho, opresivo, intermitente, de intensidad moderada, asociado a disnea de medianos esfuerzos. En el examen físico destaca una disminución del murmullo vesicular en hemitórax derecho.
Se realiza radiografía de tórax (Figura 1) que evidencia una masa de 15 x 13 cm, bordes bien definidos, de localización extrapulmonar, que desplaza las estructuras mediastínicas. La tomografía axial computarizada de tórax (Figura 2) confirma los hallazgos; se realiza biopsia de la lesión y el estudio histopatológico concluye el diagnóstico de tumor mesenquimal fusocelular. El paciente es llevado a cirugía, logrando la resección total del tumor sin complicaciones (Figura 3).
Los tumores mesenquimales de mediastino son bastante raros y representan sólo un 2% de todos los tumores mediastínicos. La sintomatología suele ser muy variada, desde pacientes asintomáticos hasta síntomas severos principalmente si el efecto compresivo es importante.
Moyamoya disease presenting as an intraventricular haemorrhage in an adult African male
Authors: Silber E. , Szkup P. , Saffer D. 
Published: August 2019

Moyamoya disease is a chronic non-inflammatory arteriopathy affecting vessels of the central nervous system, described rarely in non-Oriental populations. We document this condition in a middle -aged African male with typical clinical and angiographic features and review the current literature.
Mediating Role of Work Engagement on the Impact of High Performance Work Practices, Service Recovery Performance and Life Satisfaction in Selected Restaurants in Turkish Republic of North Cyprus
Authors: Mbi Tarkang Mary Madgaline Enow , Yunji Ruth Nange , Alafeshat Rawan 
Published: August 2019

Purpose – Drawing from social exchange theory, our study examine Work Engagement as a mediator of the impact of High Performance Work Practices on Service Recovery Performance and Life Satisfaction.Design/methodology/approach – Data obtained from the employees in restaurants in Famagusta region in Turkish Republic of Northern Cyprus. Structural Equation Modeling was used as the main instrument analysis to test the propose relationships.Findings – Work Engagement is one of the immediate outcomes of High performance work practices that engenders the performance of employee and effect on Service Recovery Performance and Life Satisfaction. The findings highlight the influence Work Engagement in the intermediate linkage between High performance work practices, Service Recovery Performance and Life Satisfaction.Practical implications – Work Engagement is a critical variable activating customer-contact employees and performance outcomes. As a suggestion, management need to attract and retain customer-contact employees who are energetic, dedicated, and are absorbed by their work.Originality/value – Most studies on service recovery has been done in Western countries, such as Asia and Australia but little known is in the Middle East, so North Cyprus was selected to be surveyed. Furthermore a comprehensive study of High performance work practices, Work Engagement, Service Recovery Performance and Life Satisfaction is yet to be investigated simultaneously in three cities in Turkish Republic of North Cyprus.
Biochemical and Histological Changes Associated with Azo Food Dye (Tartrazine) in Male Albino Rats
Authors: Elekima Ibioku , Nwachuku Ogechi Edna , Nduka Nsirim , Nwanjo Harrison Ugo , Ukwukwu Damion 
Published: August 2019

Aim: To study the effect of chronic exposure of tartarzine at ADI doses on some biochemical parameters of male albino rats.
Study Design: The design involved chronic study. In the study, the experiment was divided into phase 1, 2, and 3 which lasted for 30, 60 and 90 days respectively. In each phase, 40 rats were used and were divided into treatment and control groups. The treated groups were given 7.5 mg/kg of tartrazine orally on daily basis over the stipulated periods while the control groups were not treated with tartrazine.
Place and Duration of Study: The study was carried out in the Department of Medical Laboratory Science, Rivers State University, Port Harcourt, Nigeria within a period of 12 months (December 2017 – December 2018).
Methodology: At the end of the chronic study, 5mls of whole blood specimens was collected by means of cardiac puncture into Lithium Heparin bottles and fluoride oxalate bottles (for glucose only). The collected specimens were spun, plasma collected and analyzed for glucose, Lipase, AST, ALT, ALP, total protein, albumin and globulin. Renal, hepatic, and pancreatic tissues collected were fixed in 10% formol saline and later examined histologically using H&E stain. Statistical analysis was performed using GraphPad Prism version 5.03 (San Diego, California, USA).
Results: In the chronic treatment, glucose indicated significant increases after 30, 60, and 90 days of chronic treatment at ADI doses. Urea, AST, and ALT showed significantly higher values after 60 of treatment while creatinine, ALP, total protein, albumin and globulin indicated significantly higher values after 90 days of treatment. However, lipase did not show any significant difference after 30, 60, and 90 days of treatment. Histologically, hepatic distortions such as fatty degeneration, vacuolation, pcynosis, and compression of central vein were seen in the liver section. In the renal section, hyaline cast in proximal tubules, hypercellularity of messengial cells, and inflammation of the glomerulus were observed in the treated rats while the histology of the pancreas indicated mild vacuolation of the islet region. However, the pancreatic ducts and acinar cells were not distorted.
Conclusion: The administration of tartrazine over a period of 30 days at ADI dose did not indicate hepatocellullar and renal derangements as well histological distortions in liver, pancreas and kidneys. However, after 60 and 90 days, mild hepatocellular, pancreatic, and renal derangements were seen.
Examining Our Laboratory Results Through Participation in Multinational Material Exchange Studies
Authors: Ebughe G. A. 
Published: August 2019

Aim: The aim of this study is to determine the quality of our tissue processing through participation a multicentre research programme as part of external quality control.
Study Design: A analytical retrospective study.
Place and Duration of Study: Department of Pathology University of Calabar Teaching Hospital, July 2019.
Methodology: An analytical study reviewing the performance of lymphoma tissue contributed to a Sub-Saharan African Lymphoma consortium study commissioned in 2008/2009 for which results were published in 2012. Twelve formalin fixed paraffin embedded lymphoma tissue were tested with a panel of 40 immunohistochemistry antibodies. The tissues were cut into 480 cores placed on slides before the test.
Results: The tissues were from 5 women and 7 men. The mean age was 37years, median age 45 years and modal age was 60 years. Twenty six percent of the sectioned cores lifted at test and could not therefore produce results. The reason for the lift off was tissue brittleness. Seventy four percent (74%) had intact cores on slides and produced a staining reaction although fragile antibodies like Ki 67 and bcl6 produced non reliable results while hardy antibodies like CD20 were more reliable.
Conclusion: The quality of histopathology biopsy results in the Department of Pathology University of Calabar teaching hospital needs to be improved. The strategies to achieve this involves the institution of continuous quality control and quality assurance.