bluuebunny/crossref_metadata_2025 huggingface dataset:
دور بيئة العمل في تحقيق الرضا الوظيفي لدى العاملين
Authors: حسين توانا
Published: September 2023

تركز هذه الدراسة على دور بيئة العمل في تحقيق الرضا الوظيفي لدى العاملين، يهدف البحث أولاً معرفة مستوى الرضا الوظيفي للعاملين، وثانياً معرفة تصورات أفراد عينة الدراسة عن العوامل المؤثرة في الرضا الوظيفي للعاملين، وأخيراً معرفة العوامل الأكثر تأثيراً في الرضا الوظيفي لدى أفراد عينة الدراسة، وتدور أسئلة الدراسة حول مدى مستوى الرضا الوظيفي لدى أفراد عينة الدراسة؟ وما هو موقف أفراد عينة الدراسة من العوامل التي تؤثر على مستوى رضاهم الوظيفي؟ ولذلك العوامل التي تؤثر على مستوى الرضا الوظيفي لدى أفراد عينة البحث؟ وتحاول الدراسة الاجابة على هذه الأسئلة من خلال تنفيذ الخطوات والاجراءات الميدانية،. وتعد هذه الدراسة من الدراسات الوصفية أستخدمت فيها منهج المسح الاجتماعي بطريقة العينة، وتم اختيار عينة غير احتمالية مقصودة تكون من (100) مفردة من العاملين والعاملات في مراكز التسوق في مدينة السليمانية بطريقة المسح الاجتماعي، كما واستخدم الباحث مقياس (ليكرت الخماسي) لقياس مدى الرضا الوظيفي واعتمد على برنامج الحقيبة الاحصائية للعلوم الاجتماعية (SPSS) لتحليل فقرات المقياس ومناقشة أهداف الدراسة بطريقة علمية مبنية على الاحصاء الوصفي. وأظهرت نتائج الدراسة أن العاملين لديهم حرية في إبداء آرائهم في العمل والشعور بالمتعة في تنفيذها ممل يدل على وجود الرضا لدى العاملين عن وظائفهم وأعمالهم، أما فيما يتعلق بموقف أفراد العينة تجاه العوامل التي تؤثر على مستوى رضاهم الوظيفي أظهرت النتائج بأن هناك تصور أو منظور إيجابي لدى العمال عن وظائفهم، كما وأظهرت نتائج الدراسة وجود تبادل للآراء والمقترحات بين العمال ورؤسائهم في العمل، ومكافأة العمال من قبل الرؤساء الاداريين والتي تعد من أهم العوامل التي تؤثر على موقف أفراد عينة الدراسة فيما يتعلق بمستوى الرضا الوظيفي لديهم.
التباين المكاني للسكان غير النشطين اقتصادياً بعمر (12 سنة فأكثر) وتحليله المكاني في العراق لسنة 2021
Authors: عبيس ناجي
Published: September 2023

يهدف البحث الى التعرف على حجم السكان غير النشطين اقتصادياً في العراق ، ومدى تباينهم المكاني ، وما هي المتغيرات المرتبطة بذلك ، وللوصول إلى الحجم النسبي للعلاقات المكانية المرتبطة بالظاهرة اعتمدت الحقيبة الإحصائية (spss) باستخدام معامل ارتباط بيرسون، وتوصل البحث الى مجموعة من النتائج أهمها هو ان معدل السكان غير النشطين اقتصادياً بعمر (12 سنة فأكثر) في العراق بلغ (67.4%) لسنة 2021، وتباين حسب المحافظات اذ جاءت (محافظة ذي قار) بالمرتبة الأولى بمعدل (76.1%)، في حين جاءت محافظتي (أربيل وبابل) بأدنى معدل بلغ (65%) لكل منهما، اثبت التحليل العنقودي ان محافظات العراق تعنقدت مع بعضها بحسب درجة التجانس والتقارب فيما بينها في معدلات ظاهرة الدراسة ومتغيراتها في سبعة عشر مرحلة، وكان أكثرها تجانساً محافظتي (نينوى وميسان) اذ بلغت قمة معامل الاقتراب بينهما (1.6)، أما أكثرها تباعداً فكانتا محافظتي (دهوك ونينوى) اذ بلغت قيمة معامل الاقتراب بينهما (202).
الثقافة التنظيمية وفق منظور إطار القيم التنافسية
Authors: كعواش رؤوف , رضا بوغرزة , جمال الدين كعواش , ابراهيم بوالفلفل
Published: September 2023

يهدف هذا البحث إلى التعرف على الثقافة التنظيمية الموجودة في جامعة محمد الصديق بن يحي، جيجل، الجزائر بالاعتماد على اطار القيم التنافسية ل " كامرون" و " كوين"، وكدلك التعرف على  وجود فروق دالة في مستوى تواجد الثقافة التنظيمية السائدة بدلالة الخصائص الشخصية والمهنية للمبحوثين. تم الاعتماد على المنهج الوصفي التحليلي في اجراء البحث، كما تم جمع البيانات الميدانية بالاعتماد على استبانة تم توزيعها على 430 موظفا وعضو هيئة تدريس بالجامعة. تم تحليل البيانات بالاعتماد على المتوسط الحسابي، اختبار (ت) واختبار تحليل التباين الأحادي. توصل البحث الى وجود جميع أشكال الثقافة التنظيمية التي حددها " كامرون" و " كوين" ( الثقافة الهيراركية، ثقافة القبيلة، ثقافة السوق، ثقافة الابداع) بدرجات مختلفة، وقد جاءت مرتبة كما يلي: الثقافة الهيراركية (M 32.5)، ثقافة القبيلة (M 28.1)، ثقلفة السوق (M 23.2) وأخيرا ثقافة الابداع (M 16.1) على التوالي. كما بينت النتائج وجود فروق دالة في درجة توافر الثقافة الهيراركية تعزى الى متغيرات الجنس، نوع الوظيفة، السن، المستوى التعليمي، الأقدمية، الراتب وعدد الترقيات في الدرجة. يتطلب تطوير أداء جامعة محمد الصديق بن يحي تطوير الثقافة التنظيمية الهيراركية من خلال التحول الى دعم تدفق المعلومات، تبسيط الاجراءات والرفع من مستوى التنسيق في العمل.
Representation of English and Arabic Para Athletes with Special Reference to Transitivity System
Authors: Al-Kaaby Saad , Al-Zubaidi Nassier
Published: September 2023

This article employs one of the tools proposed by Jeffries’ (2010) framework of critical stylistic namely the TCF of representing actions/events /and states (transitivity) to examine how male and female Para Athletes are linguistically constructed as social actors in selected English and Arabic Paralympic sport magazines. It aims to identify the stylistic strategies employed in these selected magazines in their textual representation to construct the identity of Para Athletes and the effect of gender and disability in such representation. The study is focused on the analysis of 10 English articles and 10 Arabic articles from English and Arabic magazines related to the field of Para sport and issued between 2016 and 2020. To achieve the research objectives, the study hypothesizes that both the English and Arabic texts tend to assign agent roles to Para Athletes with varied gender preferences. The results of this study show that the selected magazines activate Para Athletes in an attempt to bring People with disabilities (PWDs) from margin to the foreground as social actors. However, the findings also indicate a differential representation of Para Athletes in terms of gender in that both English and Arabic texts allocate agent roles to Para Athletes, however the English texts portray males mainly as Sensers and Sayers, while the Arabic texts portray females as Actors, Sensers, Carriers, and Sayers more than males. This contradicts the common belief that women's contribution to society is excluded and underestimated, suggesting that they can play an important functional role in society like men, regardless of their social status.
جوانفيل وكتابه حياة القديس لويس التاسع مصدراً عن الحملة الصليبية السابعة على مصر 647 – 648هـ/ 1249- 1250م
Authors: اليساري حيدر
Published: September 2023

يتمحور موضوع البحث حول المؤرخ الفرنسي جوانفيل وكتابه حياة القديس لويس والذي تناول فيه احداث ووقائع الحملة الصليبية السابعة على مصر من سنة 647هـ/ 1249م الى سنة 648هـ/ 1250م في عهد الملك الفرنسي لويس التاسع ودراسة مؤلفه هذا كمصدر لاتيني عن هذه الحملة بالمقارنة مع المصادر التاريخية الإسلامية.
    وقد تبين لنا من خلال هذه الدراسة ان المؤرخ جوانفيل قد تميز بموهبته في الوصف الدقيق لأحداث وتفاصيل الحملة الصليبية السابعة على مصر، لأنه كان أحد فرسان هذه الحملة وشاهد عيان لوقائعها وملابساتها، وبحكم كونه مقرباً جداً من الملك الفرنسي، وهو يمثل نموذجاً للفارس الفرنجي الصليبي وليد المجتمع الاقطاعي الأوربي خلال العصور الوسطى بأفكاره وبنزعته الاقطاعية ورؤيته عن المسلمين وعن الحروب الصليبية، لاسيما وانه كان ينتمي الى طبقة البارونات الفرنسية وهي طبقة لها ثقلها ووزنها في المجتمع الفرنسي آنذاك، لذلك فهو يمثل وجهة النظر اللاتينية المخالفة لوجهة النظر التي تقدمها المصادر العربية الإسلامية عن وقائع وظروف هذه الحملة على مصر، وبالتالي فأن مؤلفه "حياة القديس لويس" يعّد سجل عظيم القيمة لتاريخ الملك لويس التاسع وفرنسا الاقطاعية والحملة الصليبية السابعة على مصر.
INVESTIGATING EFL UNIVERSITY STUDENTS’ MOTIVATION IN LEARNING
Authors: Abdalla Rezhan
Published: September 2023

It is believed that, motivation can affect all aspects of life. As it is self-evident in the literature, motivation has an enormous impact on teaching and learning EFL. The aim of this paper is to find out whether the students are motivated to learn EFL or not, and what type of motivation do they have; whether it is instrumental motivation or integrative motivation? This study has been conducted in the context of Kurdish EFL students at the University of Halabja, English Language Department. The problem this study is trying to tackle is to find the important role that motivation plays in learning the English language, and whether there is a lack of motivation from the EFL students, and then find ways to improve them.  To conduct this study, the quantitative approach was followed, and a Likert-Scale questionnaire was designed, and was distributed among 50 EFL male and female students. The results indicated that EFL learners at the College of Basic Education in the English Language Department at University of Halabja are, to a great extent, motivated in EFL learning. Moreover, the results also presented the majority of the students have instrumental motivation rather than integrative motivation. Based on the results, some recommendations for University EFL lecturers are being presented in order to build upon the type of motivation that students already have to have the best teaching outcome.
Las diversidades lingo-culturales de los dialectos árabes y su equiva-lente acuñado en el español
Authors: Ahmed Wisam , Qays Ghaidaa
Published: September 2023

El objetivo principal detrás de la creación de esta investigación es presentar para el lector meta hispánico los aspectos lingüísticos y culturales comunes entre los dos idiomas, no familiares además familiarizarle el uso cotidiano del vocablo en el dialecto árabe iraquí al lado del egipcio coloquial, aunque el árabe e español no son del mismo árbol lingüístico.

En esta investigación también abordaremos el análisis interpretativo- lingüístico al nivel lingüístico por un lado, y cultural por otro, para algunas [1]etimologías lingüísticas, demostrando las técnicas de traducción adaptadas por el traductor en la traducción del vocabulario árabe, si fueran a nivel culinario, frases hechas, expresiones o unidades fraseológicas. Finalmente determinaremos analizando unas muestras seleccionadas al nivel gastronómico o lenguaje vestimento , y para mostrar al lector meta que  algunos de estos vocabularios se han traducido incorrectamente, con sentido parcial no adquirieron el significado completo y exacto al trasladarlas del árabe coloquial al español sin buscar e investigar el origen de la palabra o encontrar su equivalente en la lengua de llegada, tenemos por ejemplo la palabra فطير مشلتت Fūṭyr myšəltyt-el elemento similar de este aspecto cultural sería analizado más tarde de este trabajo-que el traductor la ha traducido utilizando la técnica de traducción descriptiva a bizcocho largo y redondo, dibujándola en la mente del lector español por la forma que se ve sin acercarlo a él según su lengua materna o por lo menos usar las técnicas de domesticación y extranjerización que es prestar otra palabra del inglés que equivale la del texto original y luego encontrar el equivalente del inglés al español.

 

[1] Para más explicaciones sobre este término lingüístico véase: https://concepto.de/etimologia/
الدعم العاطفي لدى المسنين في محافظة بغداد
Authors: عبد الرحمن اسمهان , معارج رحيم
Published: September 2023

يعد الدعم العاطفي من المواضيع المهمة للإنسانية مما تقدمه الشبكة الاجتماعية من اهتمام وتعاطف وتقبل ومواساة للفرد، وكبار السن في دور الرعاية هم بأمس الحاجة الى الدعم العاطفي بسبب التغيرات البيولوجية والنفسية المصاحبة مع تقدم العمر، وبسبب ابتعادهم عن بيئتهم الاجتماعية. لذا اختارت الباحثة ان تكون عينة دراستها المسنين، وقد هدف البحث الحالي الى التعرف على الدعم العاطفي، والتعرف على دلالة الفرق في الدعم العاطفي لدى المسنين تبعا لمتغير الجنس، والتعرف على دلالة الفرق بين مكونات الدعم العاطفي تبعا (الحاجة للدعم العاطفي، البحث عن الدعم العاطفي، الدعم العاطفي المدرك، الدعم العاطفي المستلم)، وقد اعتمدت الباحثة مقياس (Schwarzer & Schulz ,2000) للدعم العاطفي وتضمن المقياس (22) فقرة موزعة على اربعة مقاييس فرعية، وقد بلغ حجم عينة البحث (150) مسنا ومسنة المقيمين في دور الرعاية الحكومية والاهلية. وقد اظهرت النتائج ما يأتي:

لدى كبار السن المقيمين في دور الرعاية مستوى اعلى من المتوسط من الدعم العاطفي.

لا يوجد فرق ذات دلالة احصائية تبعا لمتغير الجنس في الدعم العاطفي.

يوجد فرق ذات دلالة بين مكونات الدعم العاطفي حيث اظهرت الحاجة للدعم اعلى من البحث عن الدعم واظهر الدعم المدرك اعلى من الدعم المستلم والحاجة للدعم اعلى من الدعم المستلم.

وفي ضوء النتائج الحالية اوصت الباحثة بمجموعة من التوصيات والمقترحات ومنها:

على وزارة العمل والشؤون الاجتماعية ضرورة اعداد وتدريب الاختصاصيين في مجال الرعاية على تقديم الدعم العاطفي لكبار السن في دور الرعاية.
Comparison of Performance Measures of Pakistani Islamic Mutual Funds using Data Analytics
Authors: Khan Zehra , Yaqub Muhammad Shahbaz , Ashraf Yasir
Published: September 2023

The current study attempted to measure and evaluate the performance of 13 Pakistani Shariah compliant mutual funds from the time period (September 2009-August 2017) by using 18 performance measures. It followed the principle that mutual funds are used exclusively for diversification portfolio and mean-variance optimization, following the mutual fund theorem as an investing strategy. The results of few performance measures showed that many funds outperformed the benchmark, while others underperformed. The study also analyzed and compared the performance measures to characterize the relationship between them and investigated if they lead to an identical ranking by using three analysis techniques, namely Pearson’s r, Spearman’s rho, and Kendall’s tau coefficient. The study concluded that there is a high level of correlation among performance measures which indicates that the performance measures classify mutual funds in a similar manner in three sub-periods, that is, 6 months, 1 year, and 3 years. Change of frequency doesn’t disturb their classification ability.
On Valerii Antoniuk’s "Testament" Choir based on Taras Shevchenko’s Poem
Authors: Antonyuk Valentyna , Kumanovska Olena , Sheyko Alla
Published: September 2023

The purpose of the article consists in the study of modern Ukrainian composer V. Antoniuk’s reading of T. Shevchenko's program poem “Testament” using the means of musical expressiveness inherent in his individual manner with the use of the arsenal of artistic and technical tools of choral writing. Research methodology comprises a cultural approach, structural-systemic, complex and musicological analysis with generalisation of the results. Scientific novelty. Valerii Antoniuk's choral writing has been explored for the first time through the prism of the thesaurus of musical symbols and the concept of neo-romanticism (symbolism) in the context of the Ukrainian musical tradition. Conclusions. The genre of this work has been determined as “choir fresco”. The authors have found that neo-romanticism is an important component in V. Antoniuk's artistic worldview and philosophical paradigm, so the influence of romanticism poetics can be traced in the work. The archetypal images of Ukrainian artistic culture embedded in the work are analysed, which are simultaneously identified with reality, but also remain certain generalising symbols of the musical thesaurus of the author's style. The mood of the lyrical hero of the work is represented – the narrator-protagonist with the entire spectrum of his feelings, philosophical perception of the depths of the life fullness, merging with the surrounding world, feeling a part of it. The personal feelings and moods of the Ukrainian composer of the beginning of the 21st century are outlined and characterised. V. Antoniuk's understanding of the artistic and aesthetic idea, time-space, height and power accentuation of traditional singing of his native Shevchenko region by birth and origin, conglomerated with the means of modern compositional technique, revealed a deep level of the artist's individual mentality, which vividly certifies the ontological genesis of his creative identity.

Key words: mentality, image, symbolism, thesaurus, choir fresco, shevchenkiana.
Concept of Communication in World and National Science
Authors: Romaniuk Lesia
Published: September 2023

The purpose of the work is to establish the historical context of the formation of the concept of communication as a scientific discipline, to analyse modern theoretical approaches to the study of communication, to study the relationship between culture and communication in terms of moral and ethical norms. The research methodology is based on the use of methods of collecting and analysing information from available open sources, in particular, from reports of all-Ukrainian sociological surveys and studies of intercultural experience in the world. The conceptual methodological basis of the research is a systematic analysis of communication as an integral part of human life and culture, which is constantly evolving under the influence of changes in the modern world. The scientific novelty lies in the study of modern trends in the development of communication processes and the formation of new forms of intercultural communication. In addition, the study reveals the impact of modern technologies on communication processes and their interaction with cultural, social, and political aspects of society. This study is particularly important for the field of musical culture, as it shows the role of intercultural communication in the development of this field. Conclusions. The study found that communication as a process of information transfer is an integral part of the concept of culture. Interaction between cultural groups in the modern world depends on communication, which makes it possible to reduce the distance between cultures and increase understanding between them. Intercultural communication helps Ukrainian culture to preserve its uniqueness, as well as to develop and interact with other cultures to gain new knowledge and views, new experience, in particular in the field of music. Research in the field of intercultural communication is important for the development of social sciences, as it allows for a better understanding of the cultural and social processes that occur in different cultural communities.

Key words: Ukrainian culture, musical art, intercultural communication, multi-ethnicity.
Stylistic Features of National Chinese Vocal and Song Creativity
Authors: Zhang Zongrui
Published: September 2023

The article is devoted to the consideration of Chinese song culture from the standpoint of its development based on folklore. The purpose of the article is to identify national stylistic features of Chinese vocal and song culture in accordance with regional characteristics, as well as in the process of socio-cultural changes in the country. Among the main tasks of the study was to highlight the significance of the musical folklore of China in accordance with its place in the composer's creativity, as well as in the context of socio-cultural changes. The research methodology: the dialectical method as a way to distinguish the stylistic components of Chinese composers’ work as a unity of traditions and innovations; the deductive method due to the research orientation from the general (socio-historical context) to the specific (reference to the genre); the historical and cultural method to identify general stylistic regularities of the aesthetic, ideological, and socio-cultural levels in the context of historical changes; elements of genre and style analysis to identify the genre component of chamber vocal music. The scientific novelty of the obtained results lies in the fact that for the first time in the Ukrainian scientific space, the influence of national traditions as a permanent quality of vocal and song creativity is considered; the study of the regional component in accordance with the development of Chinese vocal and song culture is in-depth. Conclusions. The result of the study was the highlighting of Chinese vocal and song creativity as a synthesis of folklore and academic influences, where folklore, associated with the peculiarities of phonetics and vocabulary, intonations of the national language are of central importance. In its development and formation, the Chinese vocal and song composing school has created a powerful base that determined the further vector of Chinese song culture in general, namely vocal arrangements of folk melodies, which logically entered the genre of chamber music, where national and stylistic origins later intersected with models of the Western song-romance style.

Key words: national style, vocal lyrics, Chinese music, folklore.
Children's Musical as a Popular Genre of Ukrainian Stage Art in 1960s-1990s: Formation and Development
Authors: Belymenko Liliana
Published: September 2023

The purpose of the article is to identify the peculiarities of formation and the main trends in the development of children's musical as a popular genre of Ukrainian stage art in the 1960s-1990s. Research methodology. The historical and cultural method was used to summarise the factual material related to the time of creation and the logic of development of the children's musical in the Ukrainian stage art of the 1960s-1990s. The methods of art historical and genre-stylistic analysis were applied to help identify specific artistic and aesthetic, genre and stylistic features in the productions of children's musical on the stages of Ukrainian theatres. Scientific novelty. The history of the formation and development of the Ukrainian children's musical in the stage art of the 1960s-1990s is studied; its musical, artistic, staging and performance features are revealed. The chronological sequence of writing the most significant in the context of the development of the genre of the first national children's musicals is presented. The contribution of Ukrainian composers (Zh. Kolodub and L. Kolodub, O. Bilash, I. Poklad, S. Bedusenko) and directors (P. Kolisnyk, M. Lukavetskyi) in the formation of the national musical for children's audiences is revealed. Children's musicals by Ukrainian composers included in the "golden fund" of national stage art are analysed ("Fox Mykyta" (libretto by R. Kudlyk) and "Tom Sawyer" (libretto by M. Petrenko based on Mark Twain's novel) by B.-Yu. Yanivskyi). Conclusions. The process of integrating the musical genre into the Ukrainian stage art of the last third of the 20th century took place in accordance with the peculiarities of the socio-cultural space of that time, socio-political events and artistic trends. The creative rethinking of content and structural features of the Western genre invariant in the 1960s-1990s became the basis for the formation of the national Ukrainian children's musical as a factor in the internationalisation of the world music and stage culture. At the same time, the formation of the Ukrainian children's musical is connected with the process of nationalisation of the genre, as evidenced by the reliance of the libretto on stories from folklore and traditional Ukrainian culture, the introduction of traditional principles and techniques inherent in the stage art of Ukraine. The peculiarities of the formation and further development of children's musicals in Ukraine were conditioned by the creative searches of domestic composers (B.-Yu. Yanovskyi, I. Poklad, S. Bedusenko, Zh. and L. Kolodub, E. Lapeika, O. Kolomiitseva, A. Bondarenko) and theatre directors. The productions of children's musicals from the 1960s-1990s allow us to talk about the rethinking of the Western archetype of the genre and the beginning of the formation of a national Ukrainian musical.

Key words: children's musical, Ukrainian stage art, children's musical theatre, genre, production and performance features.
ВИЗНАЧЕННЯ РЕЖИМІВ РОЗПИЛУ УДОБРЮЮЧИХ ХІМІЧНИХ РЕЧОВИН ДЕФЛЕКТОРНИМ ПУЛЬВЕРИЗАТОРОМ В РАМКАХ КОНЦЕПЦІЇ ТОЧНОГО ЗЕМЛЕРОБСТВА
Authors: Воронько Виталий Владимирович , Брега Дмитрий Андреевич , Сахаров Денис Юрьевич
Published: September 2023

A mathematical model of the process of sputtering chemical fertilizers by means of a deflector spray with flat-flare spraying, whose work is based on the Venturi effect, is proposed. Several operating modes of the atomizer with the adjustment of the flow velocity and the angle of the spraying nozzle are examined by changing the geometric parameters of the nozzle head. The most rational parameters of the flow of the components of the atomized medium, as well as the geometric parameters of the atomizer, are taken into account, taking into account the speed of the aircraft and the effect of the screen from the watering surface.
СЕПАРАЦІЯ КОНДЕНСАТУ В ПРОЦЕСАХ ОХОЛОДЖЕННЯ ПОВІТРЯ НА ВХОДІ ГАЗОТУРБІННОЇ УСТАНОВКИ
Authors: Рыжков Сергей Сергеевич
Published: September 2023

The processes of gas turbine unit intake air cooling at changeable ambient air temperatures with producing a condensate as sub-product were investigated. With this an efficient separation of condensate at different temperatures produced during air cooling processes is considered as necessary condition for its use as coolant. Following this approach the schemes of air coolers with separation and use of condensate for previous gas turbine unit intake air cooling have been developed.
АНАЛІЗ ТЕРМОРОЗМІРОСТАБІЛЬНОЇ НЕСУЧОЇ КОНСТРУКЦІЇ ПРИЛАДУ КОРИСНОГО НАВАНТАЖЕННЯ КОСМІЧНОГО АПАРАТА
Authors: Маслей Владимир Никитович , Кулик Антонина Сергеевна
Published: September 2023

The basic provisions of the engineering procedure for development of shell cylindrical structures made of composite materials are presented in this paper. Development of shell cylindrical structures made of composite materials occupies a prominent place in development of structures made of composite materials. Such structures are commonly used as bearing members of optical-electronic equipment and must ensure a high quality of its operation.This procedure was developed for physical-mechanical characteristics prediction of composite structures. This work is topical because composite material has well-marked anisotropy of its characteristics and procedure of development of structure made of traditional metal materials cannot be used in this situation.The main feature of this work is application of analytical method of designing dimensionally stable structure. This method is the basis for the design engineering procedure for shell cylindrical structures made of composite materials. Applicability of the procedure was confirmed by structural analyses of the structure with the use of finite element method and dimension-stability tests of cylindrical test samples (with different layup schedules). Dimension-stability test of the developed drawtube structure was performed. Main operations of dimension-stability test of the structure are presented in the paper too.Such procedure allows optimizing of physical-mechanical properties of composite structures and shows the ways to reduce weight and overall dimensions of the structure.Key phases of the procedure are listed in this paper. Presented formulae allow to calculate approximately a cylindrical structure thermal strain and check structure strength. The developed procedure may be helpful during development of similar shell cylindrical structures made of composite materials.
МАТЕМАТИЧНЕ МОДЕЛЮВАННЯ АВТОКОЛИВАНЬ В РРД, ЩО ЗУМОВЛЕНІ НЕСТАЦІОНАРНИМ ВИТІКАННЯМ ГАЗІВ З РЕАКТИВНОГО СОПЛА
Authors: Басок Борис Иванович , Гоцуленко Владимир Владимирович
Published: September 2023

The mathematical model of general system instability in a liquid jet engine is obtained, taking into account the nonstationarity of the outflow of combustion products from the jet nozzle. The peculiarity of the variation of self-oscillations of vibration combustion is established depending on the geometric structure of the hydraulic characteristic of the jet nozzle. The possibility of decreasing the amplitude or complete suppression of the considered oscillations is justified. The theoretical description of vibrational combustion is represented by a system of equations for the mechanics of gases, in which the energy equation is reduced to the pressure characteristic of the heat supply. This made it possible to establish previously unknown mechanisms of this phenomenon caused by the formation of an ascending (unstable) branch on the pressure characteristic of the heat supply. Using the numerical integration of the obtained equations of the mathematical model of the self-oscillations under consideration, the nature of their dependence on the delay in combustion of fuel for various geometric types as a pressure characteristic of the heat supply as well as the hydraulic characteristics of the jet nozzle is established. The nature of the deformation of the limiting cycles of self-oscillations in the combustion chamber of LPRE is established, when mechanisms of both intra-chamber instability and flow from the jet nozzle are manifested. Using numerical simulation, an increase in the limiting cycle of self-oscillations is established with an increase in the delay time of combustion of fuel when the stationary regime is on a stable monotonically decreasing branch of the pressure characteristic of the heat supply. The expression for the critical delay time of fuel combustion is analytically obtained as a function of the acoustic parameters of the combustion chamber, its pressure characteristic and the hydraulic characteristic of the reactive nozzle. The obtained expression makes it possible to quantify the influence of these parameters on the boundary of the stability region of the stationary regime.
ЗОНДОВІ ТА СПЕКТРАЛЬНІ ДОСЛІДЖЕННЯ МАЛОПОТУЖНОГО ЕЛЕКТРОРЕАКТИВНОГО ХОЛЛОВСЬКОГО ДВИГУНА
Authors: Кулагин Сергей Николаевич
Published: September 2023

The work is devoted to the study of a low-power Hall Effect Thruster. The currency of developing and increasing of integral characteristics of Hall Effect Thruster with power consumption less 0,3 kW is substantiated. The main directions of low-power Hall Effect Thruster investigation are considered. The analysis of latest investigations and studies of low-power Hall Effect Thruster showed the existence of three main directions - development of fundamentally new schemes, improvement of existing models, as well as works on study of physical processes features in Hall Effect Thruster with power consumption up to 0,3 kW.Using developed Hall Effect Thruster ITM-31, distribution of plasma parameters in the discharge channel has been studied by probe diagnostic, and the wear of the discharge chamber walls has been studied by optical spectroscopy. Thruster characteristics are given. Investigations were carried out in a vacuum chamber 0,5 m in diameter and 0,8 m in length. The pumping was carried out by a diffusion pumps. At a maximum xenon consumption rate 1,5 mg/s, the working pressure in the vacuum chamber did not exceed 2∙10-3 Torr. Probe measurements were performed using a single probe; probe was inserted into the discharge channel from the anode side. Calculation of plasma parameters was carried out graphically. The temperature and concentration of charged particles are calculated, and the electric potential distribution is obtained. Conclusions are made about the properties of the accelerating layer.It is shown that one of the non-intrusive methods of diagnostics is the method of optical emission spectroscopy (OES). With the help of this method it is possible to provide plasma parameters investigation and characteristics of the construction wear during the thruster testing at different regimes of operation and on each stage of thruster lifetime. For the spectroscopic investigation of the Hall Effect Thruster discharge chamber walls wear the scheme of the experiment and the equipment description is presented. For the estimation of the discharge chamber insulators erosion rate the spectral lines criteria and method of wavelengths selection is presented. Mathematical model of the thruster plasma plume experimental emission spectral data processing is described that was developed on the basis of actinometry hypothesis and corona model. Results of the spectroscopic investigation of the discharge chamber erosion rate at different thruster operational regimes are presented. From experimental and theoretical model the dependence of the discharge chamber insulators erosion rate from the discharge voltage was processed.
SHM ТЕХНОЛОГІЇ В ЗАБЕЗПЕЧЕННІ ЦІЛІСНОСТІ АВІАЦІЙНИХ КОНСТРУКЦІЙ. ОГЛЯД СУЧАСНОГО СТАНУ
Authors: Погорєлов Олександр Анатолійович
Published: September 2023

The article contains review of structural health monitoring (SHM) methods. The review covers period from 1997 to now. The article attention is aviation industry as the primary user of SHM technologies. The cost reduced as motivation factors of SHM application to aviation are regarded in the article. Automatisation of control procedures and using of attached sensors are main factors of cost reduced exploitation aircrafts. Beside, SHM technologies are regarded as element of safe operation of aircraft reinforced plastic constructions. Basic principles (axioms) of the technology are presented and commented on. The article contains information on the five main methods of SHM technology - acousto-ultrasonic methods of electromechanical impedance (EMI) and Lamb waves (LW), fiber optic sensors (FO), pressure comparison method (CVM) and method of percolation sensors. The information concerns the principle of the method, application, advantages and disadvantages of the application, the technological readiness levels (TRL) on examples used of these methods. Usually, these methods are utilized for monitoring the like plate construction. The methods can determine, localized and identify the flaws as cracks in metal and plastic plate, the delaminating of reinforced plastic constructions, loosening rivet connections, corrosion damage. The methods have TLR 6-8. The equipment samples and sensors systems are utilized on constructions of experimental and series aircrafts. The road map and examples of validation of SHM-technologies in the aviation industry are considered by discussion of SAE standard ARP 6461. The S-SHM and A-SHM technologies are considered in the section. The implementation cases of SHM solutions from aircraft production companies and exploitation organizations are presented. Information is provided about R&D projects on the subject of SHM-technologies, which are in the European scientific space in FP 7 and HORIZON 2020. The projects concern research of installation SHM systems on aircraft constructions, of development of new SHM solutions and equipments, education project. Financial resource of these projects consists from EU budget, finance of industrial companies and regional budgets. The question of terminology translation from English to Ukraine is regarded in the article. The definition of the term SHM and its connection with related technologies of NDE is given.
БЕЗЛЕТОВИЩНА ТРАНСПОРТНА АВІАЦІЯ – ПРОБЛЕМИ ТА ПЕРСПЕКТИВИ
Authors: Подзирей Юрий Степанович
Published: September 2023

The possibility used of the last achievements of fundamental science for creation of the engine for vertical take-off and landing flying platform (FP) are discussed. FP intended for transportation goods and passengers in speed range of 0 - 700 km/hour. It is offered to equip with engine creating flat stream of exhaust. At take-off, landing and patrol FP used the vertical direction nozzle working on the slot-hole ejector amplifier of thrust, on the cruiser mode - the pulling propeller variable pitch airplane type. The design of the engine allows redistributed power between a nozzle and the propeller by means change of gas turbine rotor position. On take-off mode FP the power release on nozzle are needed to be enough for lifting. On transient mode the increasing of the power release is needed to be on propeller at conservation the power release on nozzle. It can be reached by means off the change of propellers pitch. In this case the reduction of vertical thrust it can be compensated by an aerodynamic lift force which arising on wing and hull FP. The engine has a compressor, creating the flat stream of the compressed air, flat combustion chamber and flat nozzle, that is the engine must be executed in linear geometry. The linear compressor made as a twin-rotor Ruts vacuum pump. The brush seals from nanocarbon tube used for preservation of axial clearance between rotors. The shape of helical trilobal rotor provides increased overlap of phases of suck up, carried and injection. The material of gas turbine blades can be made by the method of nonpiston low temperature extrusion. The method allows to simplify substantially one of the most difficult operations the production of shafts and radial blades of turbine of half-open type. Other most details of engine can be made by method of ordinary extrusion also. The seals from nanocarbon may be used for the existing constructions of GTE also. The specific features of engine are the following: work on the slot amplifier of thrust without hydrodynamic losses; choice of optimal speed of rotation of rotors for every stage of compressor; possibility cooling of compressive air and pin zone of brush seals; enhanceable operating manufacturability and cheapness of production.
МЕТОД ОБҐРУНТУВАННЯ СХЕМИ ТА ВИБОРУ ПАРАМЕТРІВ СИЛОВОЇ УСТАНОВКИ ЛІТАЛЬНОГО АПАРАТУ ДЛЯ ШВИДКОСТЕЙ ПОЛЬОТУ МП = 0…5
Authors: Улитенко Ю. А. , Кислов О. В.
Published: September 2023

In this article, we briefly review the main aspects of the method of justifying the choice of the circuit and the parameters of the power plant of an aircraft with flight speeds from 0 to 5 Mach numbers in the early stages of design. The analysis of existing methods is carried out. The algorithm for performing operations for determining the optimum composition and parameters of the power plant, as well as the size of the aircraft depending on the mass of the payload, is stated and justified. Application of the obtained results will allow to shorten the terms of creation of competitive engines for high-speed aircraft due to a purposeful search for their rational thermodynamic and constructive-geometric appearance.
ЩОДО ПИТАННЯ ПРО ЗАСТОСУВАННЯ В АВІАДВИГУНОБУДУВАННІ НОВИХ ВЕРСІЙ СТАНДАРТІВ ISO 9001:2015 І AS/EN9100D:2016
Authors: Степаненко С. М.
Published: September 2023

This paper addresses the requirements that are contained in new versions of the standards for quality management systems (QMS), namely International Standard ISO 9001:2015 and the AS/EN9100D:2016 standard published by International Aerospace Quality Group (IAQG). An analysis of the changed structure of the standards has been conducted. For each section containing new or changed requirements to QMS, comments are given which state essential features of new introduced requirements. It has been concluded that new standards alongside with preserving the common purpose of QMS, scope and content of main operation principles, introduced many new terms and essential changes which are crucially important in nature.
ЗАКОНОМІРНОСТІ ТЕЧІЇ ДВОФАЗНОГО ПОТОКУУ ВХІДНОМУ ПРИСТРОЇ ВЕРТОЛІТНОГО ГТД
Authors: Двирник Я. В. , Павленко Д. В.
Published: September 2023

The results of finite element modeling of the airflow contains dust particles of various sizes in the helicopter gas turbine engine air inlet duck with mounted and dismounted dust protective device are given. The main laws of the behavior of multiphase flow in the gas turbine engine inlet duct in response to the particle size are determined. It clarifies that the use of dust-protective devices does not eliminate dust particles in full manner. An estimation of the possibility of replacing the simulation of a two-phase flow with one-phase in the GTE compressor has been made
ЧИСЛЕННЕ МОДЕЛЮВАННЯ ТЕЧІЇ В БАГАТОСТУПЕНЕВІЙ ТУРБІНІ НИЗКОГО ТИСКУ
Authors: Стахняк Н. А. , Резник С. Б. , Хомылев С. А. , Карпенко А. М.
Published: September 2023

In present paper the results of a study of the interaction between the main flow and the leakage flows in a shrouded low pressure turbine are presented. The investigation was performed numerically with using of the Numeca Fine/Turbo commercial software. A number of LPT calculations with the consecutive increasing of their complexity were performed. The impact of radial gap leakages, shroud and hub cavities (with taking into account the cooling air injection) on turbine main parameters was assessed. The obtained results allowed to predict the investigated LPT efficiency that will be verified during the engine tests.
КОМП'ЮТЕРНЕ МОДЕЛЮВАННЯ УДАРНОЇ ВЗАЄМОДІЇ ВЕЛИКОГО ПТАХА З РОБОЧИМИ ЛОПАТКАМИ ВЕНТИЛЯТОРА ТРДД
Authors: Меркулов В. М. , Шереметьев А. В. , Петров А. В. , Придорожный Р. П. , Донченко В. В.
Published: September 2023

As a result of the experimental-calculated analysis, and the analysis of consequences of real cases of collision with large birds domestic and foreign high bypass ratio turbofans, the calculated model of shock interaction of a large bird with high bypass ratio turbofan fan blades is offered and its verification is spent. With use of the chosen model computer modelling of process and consequences of a large bird impact to the modern high bypass ratio turbofan with wide horde shroudless fan blades is led. The methodical approach by definition of degree of danger to the engine of consequences of collision with a large bird is offered.
ДОСЛІДЖЕННЯ ДЕФОРМАЦІЙНОГО ПОЛЯ ЗВАРНИХ ТИТАНОВИХ ЗАГОТІВОК ТИПУ «ОБОЛОНКИ», ВИГОТОВЛЕНИХ МЕТОДОМ ВИБУХОВОГО ШТАМПУВАННЯ
Authors: Воронин В. Н. , Зайцев В. Е. , Коцюба В. Ю. , Третьяк В. В.
Published: September 2023

The advantages are considered and lacks of technology of making of details of type of «Shell» by the method of the explosive stamping. Results are presented of researches on working off of technology of making of difficult details. A plan is considered of conducting of experiments for working off of technology. Nomogrammi are presented of deformation fields of detail of type «Shell» after every transition. On results conducted researches conclusions are done on the use of the offered technology. The research of deformation fields confirms possibility of making of details of the given type by technology of the explosive stamping, that allows to lower a quantity of transitions and shorten technological resources.
ПІДВИЩЕННЯ ЕФЕКТИВНОСТІ МЕТОДІВ ТРЕНДОВОГО АНАЛІЗУ І КОНТРОЛЮ ПРИ АНАЛІЗІ ТЕХНІЧНОГО СТАНУ ГАЗОТУРБІННИХ ДВИГУНІВ
Authors: Миргород В. Ф. , Гвоздева И. М.
Published: September 2023

The paper suggests an approach to joint trend analysis and trend monitoring of time series formed by the parameters of gas-turbine engines technical conditions in their long-term operation. The proposed approach is based on forming the diagnostic model in the form of a polynomial approximation of the throttle characteristics for the reference motor and selecting the deviations from this model. For the obtained multidimensional time series of deviations from the diagnostic model, the known methods of trend analysis and trend monitoring are consistently applied. The proposed approach makes it possible to increase the reliability of statistical conclusions about the engines technical conditions.
ФУНКЦІОНАЛЬНО СТІЙКА СИСТЕМА СТАБІЛІЗАЦІЇ ПАРАМЕТРА ПОВЗДОВЖНЬОГО РУХУ МАЛОГАБАРИТНОГО ЛІТАЛЬНОГО АПАРАТУ
Authors: Фирсов С. Н. , Бояркин А. А. , Будиба Уиссам , Жежера И. В.
Published: September 2023

The outcomes of development of methodological, mathematical and algorithmic maintenance of countering abnormal situations in small-sized aircraft longitudinal channel on its system-level are presented in the paper. Within the approach the stages of developing are represented as independent problems, for solving of which the offered models have been used. In the offered control structure knowledge, instrumental tools and specific experience of the development of algorithms, obtained as a result of research, were systematized. Implementation of the formed scheme in the real projects will lead to increasing of quality of the restoration modules functioning and reduce the time and costs for its development.
ВИКОРИСТАННЯ МАРГАЛЕФОВОЙ МОДЕЛІ СУКЦЕСІЇ В ТЕХНОЛОГІЯХ ДИСТАНЦІЙНОГО ВИЯВЛЕННЯ ОЗНАК АНТРОПОГЕННИХ ВПЛИВІВ НА РОСЛИННИЙ
Authors: Высоцкая Е. В. , Беспалов Ю. Г. , Печерская А. И. , Парвадов Д. А.
Published: September 2023

Using the method of discrete modeling of dynamic systems, based on analysis of photo’s colorimetric parameters investigated area, obtained using unmanned aerial-up apparatus, is proposed for detection signs of subtle changes in crops of cultivated plants due to anthropogenic impacts on biological production processes. Nature of areas colorimetric parameters exposed reclamation, along usual cultural practices, almost completely coincides with the character of Margalef model of succession parameters dynamics, which is absent on not remediated areas, has been found
МАТЕМАТИЧНА МОДЕЛЬ КОЛИВАНЬ П'ЄЗОЕЛЕМЕНТА НА ОСНОВІ МАТРИЧНО-ОПЕРАТОРНОГО МЕТОДА
Authors: Васильчук Д. П. , Хуторненко С. В. , Семенец Д. А. , Комолов В. М.
Published: September 2023

A mathematical calculation models of the thickness-shear waves in piezoelectric plates have been explored (studied). Their advantages and shortcomings are analyzed. The mathematical model of the thickness-shear waves in piezoelectric plates on the basis of the solution of state equations, movements and electrostatics of the turned quartz Y-cut by the matrix operator method, considering dependence of electric and mechanical boundary conditions from coordinate was proposed. Analytical expressions for mechanical stress, mechanical shift, potential, electric displacement are developed.
ОПТИМІЗАЦІЯ ПАРАМЕТРІВ ФУНКЦІОНУВАННЯ ІНТЕЛЕКТУАЛЬНОЇ СИСТЕМИ ІДЕНТИФІКАЦІЇ ОБ’ЄКТІВ НА МІСЦЕВОСТІ
Authors: Москаленко В. В. , Коробов А. Г.
Published: September 2023

Operation algorithm of object identification system on the ground with the optimization the set of features and control tolerances of their value is considered. Global descriptor for describe object image that is invariant to rotation and takes into account local features and their spatial distribution is proposed. The algorithm to calculate the proposed descriptor lies in search a vector of frequencies occurrence of characteristic points of the object in the search window and a histogram of occurrences of pairs of neighboring cell search window in which both contain cue points with the same label. The algorithm for the formation of parameterized training samples to adapt to the viewing distance when using a lens without focus-managed. The proposed algorithms to solve the problem of identification of land vehicles in the monitored area are modeled in Unity 3D virtual environment.
СІТКОВІ ПАТЕРНИ, ЯК МАТЕМАТИЧНА МОДЕЛЬ БАГАТОЕЛЕМЕНТНИХ ВИМІРЮВАЧІВ
Authors: Карташов А. В. , Чернышева А. Ю.
Published: September 2023

Computer modeling of measuring devices that contains matrix of electrodes are examined. Method of local weighted approximation is applied. Special location of the measurement nodes that forms a matrix structure (grid pattern) is applied for quadratic basis. It is shown that in this case either calculation of scalar or estimation of scalar derivatives in the central pattern node can be produced uniformly by prior finding of resolvent. Examples of usages of given method for finding the minimum of a function of two variables are considered. The possibility of using considered method for finding minimums of functions with discontinuities derivatives is specified.
СИНТЕЗ ОПТИМАЛЬНИХ ЗА ВАРТІСНИМИ АБО ЧАСОВИМИ ВИТРАТАМИ ПЛАНІВ ПОВНОГО ФАКТОРНОГО ЕКСПЕРИМЕНТУ
Authors: Кошевой Н. Д. , Кошевая И. И. , Раскин Л. Г.
Published: September 2023

The method for synthesizing optimal plan for cost and time-consuming in full factorial experiment based on the use of Gray code were developed. It allows to search without a complete sort out of all the permutations of options. The catalog of optimal plans of full factorial experiment for a number of factors from 2 to 5 was formed. Check the performance of this method was carried out by the example of research in fiber angle converter into a digital code, and the technological process of manufacturing detail by hot stamping. Optimum plans of the experiment in cost and time-consuming were studied for these objects. It was proved that the sequence of the rows in increasing number of factors levels change must correspond to the sequence of factors in decreasing of cost by changing the levels of the factors.
ПРОЦЕСИ УЗАГАЛЬНЕНОГО ЗВОДУ ЗНАНЬ З УПРАВЛІННЯ ПРОЕКТАМИ
Authors: Кононенко И. В. , Агаи А.
Published: September 2023

The present article deals with the development of a generalized body of knowledge in project management. In this paper, a set of processes of this generalized body of knowledge is formed. The set of processes is created on the basis of standard PMBOK by using the standard ISO 21500, plan-driven methodology PRINCE2, SWEBOK Guide as well as Agile methodologies SCRUM, XP, and Kanban. Activities of PRINCE2 and SWEBOK, practices of XP and Kanban were represented as processes. The generalized body of knowledge also includes the processes proposed by the experts. All processes of the generalized body of knowledge were distributed over ten knowledge areas and eight processes groups. Process tables were formed.