bluuebunny/crossref_metadata_2025_split huggingface dataset:
Calculation method of paddling blades propulsor based on the flat sections theory
Authors: Яковлев А.Ю. , Чепурко С.И. 
Published: June 2022

В статье представлен метод расчета гребного лопастного движителя. Гребной лопастной движитель представляет собой запатентованное техническое решение, реализующее принцип создания тяги за счет гребка, осуществляемого лопастями. Лопасти предполагается устанавливать на обоих бортах исследовательского подводного аппарата. Метод основан на гипотезе плоских сечений, моделировании отрывного обтекания по формуле Релея, использовании упрощенной схемы расчета характеристик гидродинамических профилей. Для моделирования нестационарных эффектов при работе движителя используются коэффициенты присоединенных масс. Разработанный метод верифицирован путем сопоставления результатов расчета с ранее выполненными CFD расчетами гребных лопаток в пакете OpenFOAM. Показана удовлетворительная точность прогнозирования сил, действующих на гребной лопатке. В дальнейшем предполагается использовать разработанный метод при проектировании и оптимизации гребных лопастных движителей.
The article presents a method for calculating the paddling blades propulsor. The paddling blades propulsor is a patented technical solution that implements thrust creation due to paddling by the blades. The blades are supposed to be installed on both sides of the research underwater vehicle. The method is based on the hypothesis of flat sections, modeling of the separation flow by the Rayleigh formula, using a simplified calculating scheme of the hydrofoil section characteristics. The added mass coefficients are used to simulate non-stationary effects during the operation of the propulsor. The developed method is verified by comparing the calculation results with previously performed CFD calculations of the paddling blades. Satisfactory forecasting accuracy of forces acting on the paddling blade is shown. In the future, it is planned to use the developed method in the design and optimization of paddling blade propulsors.
Study of the service vessel’s hydrodynamic characteristics by approximate methods
Authors: Чебан Е.Ю. , Никущенко Д.В. , Мартемьянова О.В. , Лукина Е.А. , Тихобаев М.Ю. 
Published: June 2022

Представлены результаты сравнения расчётов сопротивления приближенными параметрическими и численными методами. Рассчитано сопротивление воды движению речного служебного судна. Использованы параметрические методы G. van Oortmerssen, DeGroot RB, Holtrop, реализованные в программных продуктах FreeShip и NavCad. Для численного моделирования использовался программный комплекс вычислительной гидродинамики FineMarineTM. По сравнению с результатами численного моделирования, расчеты в программе FreeShip методом van Oortmerssen показывают достаточное совпадение при Fr>0,29, в то время как NavCad этот же метод в диапазоне Fr от 0,29 до 0,41 показывает отличие от 0 до 40 процентов. Метод DE Groot RB в диапазоне Fr=0,24…0,36 показывает большую ошибку, занижая сопротивление на 14…26%, и завышает результат при Fr=0,41 до 20%. Сделан вывод о необходимости разработки специального параметрического метода оценки сопротивления для судов вспомогательного флота внутреннего плавания с небольшими отношениями L/B и B/T.
The comparison results for parametric and numerical methods of ships resistance prediction are given. The water resistance to the movement of a river service vessel was calculated by the parametric methods of G. van Oortmerssen, DeGroot RB, Holtrop, implemented in the FreeShip and NavCad software products. For numerical modeling, the FineMarineTM САВ-code was used. Compared with the results of numerical simulations, the calculations results FreeShip using the van Oortmerssen method show sufficient agreement at Fr> 0.29, while the NavCad method in the Fr range from 0.29 to 0.41 shows a difference from 0 to 40 percent. DE Groot RB method in the range Fr = 0.24 0.36 shows a larger error, underestimating the resistance by 14 ... 26%, and overestimates the result at Fr = 0.41 to 20%. In general, the work shows that for technical fleet ships of the inland navigation with small L/B and B/T ratios, it is advisable to develop a special parametric method for determining resistance, based on the results of model and field tests, as well as numerical modeling.
The role of the scale factor in the interaction of hydrodynamic and electromagnetic fields
Authors: Маламанов С.Ю. , Павловский В.А. 
Published: June 2022

Изучение взаимодействия гидродинамического и электромагнитного полей с помощью математического моделирования является актуальной и важной как чисто научной, так и прикладной задачей. Основополагающие работы в этом направлении принадлежат Гейзенбергу, Паркеру и Каулингу. В нашей стране в этом направлении активно работали Я.Б Зельдович, С.И. Брагинский, Г.А. Любимов, А.Г. Куликовский [1-4]. Нелинейный характер уравнений магнитной гидродинамики позволяет получать аналитические решения только в редких частных случаях. Трудности в поиске аналитических решений магнитогидродинамических задач и неотложные задачи практики сделали весьма привлекательным численное моделирование, которое с помощью новейших компьютерных технологий дают возможность ставить и решать многие комплексные научные и технические задачи.В настоящей работе представлены результаты численного моделирования, направленные на изучение взаимодействия гидродинамического и электромагнитного полей с помощью модуля ANSYS.CFX, Модельная постановка задачи позволяет лучше понять определённые аспекты этого взаимодействия.
The study of the interaction of hydrodynamic and electromagnetic fields with the help of mathematical modeling is a topical and important task, both purely scientific and applied. The fundamental works in this direction belong to Heisenberg, Parker and Cowling. In our country, Ya.B. Zel'dovich, S.I. Braginsky, G.A. Lyubimov, A.G. Kulikovsky [1-4]. The non-linear nature of the equations of magnetohydrodynamics makes it possible to obtain analytical solutions only in rare special cases. Difficulties in finding analytical solutions to magnetohydrodynamic problems and urgent practical problems have made numerical modeling very attractive, which, using the latest computer technologies, makes it possible to set and solve many complex scientific and technical problems.This paper presents the results of numerical simulation aimed at studying the interaction of hydrodynamic and electromagnetic fields using the ANSYS.CFX module. The model formulation of the problem allows us to better understand certain aspects of this interaction.
A power-law generalization of the Fourier thermal conductivity formula and the resulting variants for writing the energy equation.
Authors: Павловский В.А. 
Published: June 2022

В настоящее время при решении задач тепло-массообмена используются линейные определяющие уравнения – в теплопередаче согласно закону теплопроводности Фурье плотность теплового потока линейно связана с градиентом температуры. Такие определяющее уравнение нашло широкое применение для описания процессов тепло – массопереноса при ламинарном режиме течения. Для турбулентных течений эти уравнения непригодны, приходится вводить в рассмотрение эмпирический турбулентные коэффициент теплопроводности λt. Однако для описания турбулентных течений возможно пойти и другим путём - модифицировать линейное определяющее соотношения Фурье за счёт придания ему нелинейного степенного вида. В данной работе выполнено двухпараметрическое степенное обобщение формулы теплопроводности Фурье для плотности теплового потока, которое в зависимости от значения показателя степени в этом определяющем соотношении для течений жидкости приводит к различному описанию тепловых процессов. Предлагаемое уравнение энергии турбулентного режима движения жидкости может быть полезно, по крайней мере, для получения предварительных, оценочных характеристик перед началом численного моделирования с использованием современных пакетов прикладных программ.
Currently, when solving problems of heat and mass transfer, linear constitutive equations are used - in heat transfer, according to the Fourier heat conduction law, the heat flux density is linearly related to the temperature gradient. Such a constitutive equation has found wide application for describing the processes of heat and mass transfer in a laminar flow regime. For turbulent flows, these equations are unsuitable; one must introduce into consideration the empirical turbulent thermal conductivity coefficient λt. However, to describe turbulent flows, it is possible to go in another way - to modify the linear Fourier constitutive relation by giving it a nonlinear power-law form. In this paper, a two-parameter power-law generalization of the Fourier thermal conductivity formula for the heat flux density is performed, which, depending on the value of the exponent in this constitutive relation for fluid flows, leads to a different description of thermal processes. The proposed equation for the energy of the turbulent regime of fluid motion can be useful, at least for obtaining preliminary, estimated characteristics before starting numerical simulation using modern software packages.
At Ta’addud Al-Lughawi wa In’akasatihi ‘Ala At Ta’lim Al ‘Arabi An Naijiri Dirasatan Lisaniyah Tathbiqiyah
Authors: Khamis Haroun Hajir , Sabi’u Auwal Abdulwahid 
Published: June 2022

ملخص البحث
لقد لاحظ الباحثان من خلال تجربتهما التدريسية أن عددًا هائلًا من الطلبة يرتكبون أخطاء لغوية في التعبيرين الشفهي والكتابي، وأن الباعث الأساسي لهذه الأخطاء هو التعدد اللغوي الذي يؤدي إلى نقل الخبرات اللغوية المكتسبة من لغة ما إلى مجال تعلّمهم اللغة الثانية، ومن ثمّ يشُمّ الباحثان رائحة عدم تنبّه الكثيرين من متعلّمي اللغة الثانية لحقيقة خطيرة جدًا تتمثل في كون اللغة في تصرفاتها عرفية اعتباطية لا منطقية، ومن خلال تلك الملحوظة حُددت المشكلة التي تتعرض لها هذه المقالة، وهي القيام بدراسة تحليلة لمثل تلك الأخطاء، والكشف عن هذه الحقيقة التي يجهلها الكثير من متعلمي اللغة الثانية، وتكمن أهمية هذه الدراسة في كونها تساعد في الكشف عن مواطن الضعف لدى الطلبة، ومن ثمّ العمل على تقويمها وعلاجها، واقتضت طبيعة هذه الدراسة الاعتماد على المنهجين الوصفي التحليلي، وخلُصت المقالة إلى نتائج منها أن ضعف المستوى من قبل مدرّسي اللغات، وعدم معرفة المنهج الأمثل لتعليم اللغات يؤثّر سلبًا على تعلّم وتعليم اللغات، وختامًا يقترح الباحثان إجراء مزيد من البحوث اللغوية في مجال تعلّم وتعليم اللغات، ففي الحقيقة لا يزال المجال بحاجة إلى مزيد من البحوث الـمواكبة لتطورات العصر.
Abstract
The two researchers have noticed through their teaching experience that a large number of students make linguistic errors in the oral and written expressions, and that the main motive for these errors is the multilingualism that leads to the transfer of linguistic experiences gained from a language to the field of their second language learning (Arabic Language) , and the researchers notified a lot of lack of Many second language learners have alerted to a very dangerous fact that the language in its behavior is customary, arbitrary, not logical, and through this remark the problem that this article is exposed to, which is to conduct an analytical study of such errors, and reveal this fact that many language learners are ignorant of second language. The importance of this study it’s to helps and reveal the students' weaknesses, and then work to evaluate and treat them, and the nature of this study required reliance on the descriptive and analytical approaches, and the article concluded with results, including that the poor level of language teachers, and the lack of knowledge of the optimal approach to teaching Languages ​​negatively affect the learning and teaching of languages, and in conclusion the two researchers suggest conducting more linguistic research in the field of learning and teaching languages, in fact the field still needs more research to keep pace with the developments of the times.
Al-Idhâfah Fî Al-Lughah Al-‘Arabiyah Wa Al-Lughah Al-Indûnîsiyah Dirâsatan Taqabuliyyatan
Authors: Podungge Juliana , Isman Nofa 
Published: June 2022

ملخص البحث
هدفت هذه الدراسة إلى معرفة بين الإضافة في اللغة العربية واللغة الإندونيسية لاكتشاف أوجه التشابه والإختلاف بينهما من الناحية الصرفية، والنحوية، والدلالية تسهيلا لتنبؤبالصعوبات التي يتوقع حدوثها أن يوجهها الدارسين الإندونيسيين أثناء التعلم ثم يرجى أن تكون هذه الدراسة الحصول على إعداد المواد الدراسية لتعليم اللغة اللغة العربية لدى المبتدئين الإندونيسيين على مستوى الإضافة. نهجت هذه الدراسة المنهج الوصف التحليلي للوقوف على خصائص الإضافة في اللغتين؛ العربية والإندونيسية، والمنهج التحليل التقابلي لمقارنة الأنظمة في اللغتين. واستنتجت من هذه الدراسة أن توجد أوجه التشابه والاختلاف بين الإضافة في اللغة العربية واللغة الإندونيسية من الناحية الصرفية والنحوية والدلالية.
Abstract
This study is aimed t know the phrase between the Arabic languange and Indonesian languange in order to determine the similarities and differences among them in terms of morphology, syntax, and semantic, it is to expected to predict the difficulties that will be faced by Indonesian students during the teaching activities, and then it is expected to porpose a method of teaching based on the result of the contrastive study to teach Arabic languange at the level of the phrase for beginner students og Indonesian. This study uses methodology of descriptive analysis to identify the characteristics of phrase in Arabic and Indonesian, and then using the method of comparative analysis to compare Arabic and Indonesian languange at the level of phrase in order to obtain the similarities and differences between these both languange. The result of this research is there are similarities and differences of phrase in Arabic and Indonesian in terms of morphology, syntax, and semantics.
Tashmim Al’ab Lughawiyah Li Ta’lim Al ’Anasir Al-Lughawiyah Min Khilali Al-Mufradat Al-Arabiyah Bayna Yadayk Al-Juz Al-Awwal
Authors: Ramdhan Putra Afif , Ismail Hasan Hadil 
Published: June 2022

ملخص البحث
تعد اللغة وسيلة التواصل والتفاهم الأساسية بين البشر وتعد اللغة العربية بجمالها وخصائصها ومنها عناصر لغوية التي هي أساس بنيت عليه اللغة نفسها، لذا ينبغي للمعلم والمتعلم للناطقين بغيرها لمعرفة اللغة العربية بوسيلة من وسائل التعليم ألا وهي ألعاب لغوية من خلال المفردات المقترحة من "كتاب العربية بين يديك الجزء الأول"، بحيث إنها تعين الطلابة على فهم اللغة وترقيتها وبيان كيفية الاستفادة منها في إثراء لغة الطلاب المبتدئين.
Abstract
Language is the main means of communication and understanding between humans and Arabic considered with their beauty and characteristics, including the linguistic elements which form the basis on which language is built, so that teachers and students for speakers of other languages must know Arabic through educational facilities, which is a linguistic game through the proposed vocabulary from "Arabic Book Bayna Yadayk, Part One," because it helps students gain understanding of language, promote it, and show how to use it to enrich the language of beginner students.
Tashmim Al`ab Lughawiyyah Li Ta`lim Al Lughah Al A`rabiyah Min Khilali Al-Kalimat Dzatu Ashlin A`rabiy Fi Qamus Al-Lughah Al Indunisiyyah Al Kabir Li Al Mubtadin Al Indunisiyyin Min Harfi ( R ) Ila ( Z )
Authors: Ismail Hasan Hadil , Aziz Abdul 
Published: June 2022

ملخص البحث
هذه الدراسة تهدف إلى حصر الكلمات ذات أصل عربي في قاموس اللغة الإندونيسية الكبير (KBBI) من حرف (R) إلى حرف (Z). كما تهدف أيضا إلى وضع تلك الكلمات في تصميم ألعاب لغوية لتعليم الإندونيسيين المبتدئين. وتعتمد هذه الدراسة على المنهج الوصفي تحليلي، حيث جمع الباحث الكلمات ذات أصل عربي من حرف (R) إلى حرف (Z) من القاموس وحددها، وهذه الكلمات العربية بعد أن دخلت إلى اللغة الإندونيسية تنقسم إلى أربعة أقسام: الأول: الكلمات العربية بقيت معانيها في اللغة الإندونيسية، والثاني: الكلمات العربية اتسعت معانيها في اللغة الإندونيسية، والثالث: الكلمات العربية ضاقت معانيها في اللغة الإندونيسية، والرابع: الكلمات العربية تغيرت معانيها في اللغة الإندونيسية. وتوصلت الدراسة إلى النتيجتين الأساسيتين: الأولى: أن عدد الكلمات الإندونيسية ذات أصل عربي في القاموس من حرف (R) إلى حرف (Z) بلغ إلى مئة خمسة وخمسين كلمة. والثانية: أن من طرق الاستفادة من تلك الكلمات لتعليم الإندونيسيين المبتدئين هي ألعاب لغوية.
ABSTRACT
This study aims to limit and analyze the words of Arabic origin in the big Indonesian language dictionary (KBBI) from the letter (R) to the letter (Z) and analyze it. It also aims to put those words into designing language games to teach junior Indonesians. This study relies on the descriptive analytical method, where the researcher collected words of Arabic origin from the letter (R) to the letter (Z) from the dictionary and identified and analyzed in terms of sound and significance, and these Arabic words after they entered the Indonesian language are divided into four sections: First: The Arabic words have their meanings in the Indonesian language, and the second: Arabic words have expanded their meanings in the Indonesian language, and the third: Arabic words have narrowed their meanings in the Indonesian language, and the fourth: Arabic words have changed their meanings in the Indonesian language. The study reached the two main results: The first: The number of Indonesian words of Arabic origin in the dictionary from the letter (R) to the letter (Z) amounted to a hundred fifty-five words, and it was analyzed. The second: that one of the ways to use these words to teach beginners Indonesians is language games.
Manhaj Ta’lim Al-Lughoh Al-Arabiyyah Min Khilali Al-Kalimat Al- Atsyihiyah Zati Aslin Araby Fi Mu’jam Bahasa Aceh-Indonesia
Authors: Mulyadi  , Afdhal M.Hilal 
Published: June 2022

Abstract
The researcher has found many Indonesian words that are derived from the Arabic language in the Aceh-Indonesian dictionary. Therefore, the researcher sees the possibility of teaching Arabic to the Indonesian beginners with these words. Using the analytical descriptive method the researcher finds and gathers these Indonesian words that are derived from the Arabic language from the Aceh-Indonesian dictionary from the word “Ka,bah” to the word “Nujum”, then describes these words according to their changes in meaning after entering the Indonesian language, then uses these words to create a suggested curriculum used for teaching Arabic. The researcher reached a result: that there are 152 words that are derived from the Arabic language from the the Aceh-Indonesian dictionary from the word “Ka,bah” to the word “Nujum”. And these words are divided into parts based on their changes in meaning, those that have unchanged meanings, those which have a wider meaning, those which have narrowed meanings, and those which have changed meanings. Also there is the possibility of creating a curriculum in teaching Arabic from these words by putting these words in conversations and Arabic literature. Then it’s the teachers turn to explain the vocabularies.
Relationship between Hormonal Contraception and Menstrual Cycle
Authors: Kurniawati Hidayatul , Afifatul Latifah  
Published: June 2022

Background: The high rate of baby births in Indonesia increase in population each year. Family planning is a way to regulate the number of children and birth spacing between children with contraception. Injection and pill contraceptives are hormonal contraceptives. However, the use of contraceptives has an impact on weight gain, nausea, vomiting, headaches, and swollen feet. Dusun Kepuk is one of the villages in the Bangsri sub-district with the domination used of hormonal contraception compared to other methods, and the side effects of using this hormonal contraceptive method are not known. The aim of the research was to determine the relationship between the use of hormonal contraceptives and changes in the menstrual cycle in Kepuk Village, Bangsri District, Jepara Regency.
Methods: This was non-experimental research with a cross-sectional design conducted in Kepuk Village, Bangsri District, Jepara Regency. The population in this study were acceptors who used hormonal contraception (pills and injections). The samples were taken with purposive sampling based on the inclusion and exclusion criteria. This study used a questionnaire to obtain information from respondents. The data were analyzed using the SPSS chi-square correlation test.
Results: Most respondents with 3 months of injected contraceptives suffer a disrupted menstrual cycle, as many as 51 respondents (71.8%). The Chi-Square test result p = 0.001 show that there is a relationship between the use of hormonal contraceptives and the menstrual cycle.
Conclusion: The use of hormonal contraception is associated with changes in the menstrual cycle changes in Kepuk Village, Bangsri District, Jepara Regency.
Effect of Combination of Tamsulosin and Tadalafil in Benign Prostate Hyperplasia Patients on International Prostate Symptom Score
Authors: Anandi Aldeno Wahyu , Etriyel MYH  , Yevri Zulfiqar  
Published: June 2022

Background: Benign prostate hyperplasia (BPH) is the most common pathological condition that contributes to lower urinary tract symptoms (LUTS) in men. Alpha1-blockers are recommended as first-line therapy for LUTS due to BPH (LUTS-BPH). Phosphodiesterase 5 (PDE5-I) inhibitors, which have been used as first-line therapy for erectile dysfunction, have also been found to be effective in treating LUTS-BPH. However, the appropriate combination therapy strategy is still unclear until now.
Methods: This study used an experimental design on 17 BPH patients on medical therapy. The patient was given Tamsulosin 0.4 mg monotherapy for 7 days and then continued combination therapy with Tamsulosin 0.4 mg and Tadalafil 5 mg for the next 7 days. Total IPSS score, obstruction, irritation, and quality of life (QoL) were assessed before treatment, after monotherapy, and after combination therapy.
Results: The mean age of the research subjects was 62.12 years. Improvements in the total IPSS value, obstruction, irritation, and QoL showed significant changes in both types of therapy compared to the initial value. Combination therapy gave better results than monotherapy, with a mean difference in the decrease in the total IPSS value of 4.41 (p<0.001), obstruction of 3.18 (p<0.001), irritation of 1.41 (p<0.001), and QoL 0.6 (p<0.001).
Conclusion: The combination therapy of Tamsulosin 0.4 mg with Tadalafil 5 mg once a day showed clinically and significantly better results than monotherapy in total IPSS, obstruction, irritation, and QoL values in LUTS-BPH patients.
Sodium Levels as a Predicting Factor for the Occurrence of Perforated Appendicitis in Children at Dr. M. Djamil General Hospital Padang
Authors: Alhamda Syukri , Jon Efendi  , Budi Pratama Arnofyan  
Published: June 2022

Background: Perforation of the appendix can lead to life-threatening complications. Early identification of a perforation before surgery has important clinical implications. Hyponatremia was previously proposed as a marker to differentiate between perforated and non-perforated acute appendicitis. This study aims to determine the role of sodium levels as a predictive factor in the incidence of perforated appendicitis in children at Dr. M. Djamil General Hospital Padang.
Methods: This research is an analytic observational study with a cross-sectional design. The research took place from March to May 2022 at Dr. M. Djamil General Hospital Padang. Samples were taken by consecutive sampling with criteria aged 0-18 years and diagnosed with acute appendicitis at Dr. M. Djamil General Hospital Padang.
Results: A total of 112 samples with most of the patients (52.7%) aged 6-11 years and found a greater proportion of men (57.1%). Most of the patients underwent laparotomy procedures (57.2%). Hyponatremia was found in 58% of patients. Perforation occurred in most (59.8%) patients. SPSS results showed a significant difference between the incidence of hyponatremia in perforated and non-perforated appendicitis with a p-value <0.001.
Conclusion: There is a significant relationship between sodium levels and the incidence of perforation, where the lower the sodium level, the higher the incidence of perforation.