bluuebunny/crossref_metadata_2025_split huggingface dataset:
Исследование многофазных систем массового обслуживания с помощью методов машинного обучения
Authors: Вишневский В.М. , Ларионов А.А. , Мухтаров А.А. , Соколов А.М. 
Published: October 2024

Рассматривается многофазная система массового обслуживания с входящим коррелированным МАР-потоком, РН-распределением времени обслуживания и ограничен­ным размером буфера на фазах системы. Приведен краткий исторический обзор по анализу моделей таких систем и методов их исследования. На основании проведенного обзора обосно­­вана новизна постановки задачи, рассматриваемой в статье, методов ее решения и результатов. Дано описание алгоритма точного расчета характеристик производительности многофазных систем малой размерности и оценки сложности этого алгоритма. Для исследо­вания многофазных систем большой размерности предложен подход, основанный на комби­на­ции методов имитационного моделирования и машинного обучения. Приве­дены результа­ты численного анализа, подтвердившие эффективность применения методов машинного обучения для оценки характеристик производительности тандемных систем, адекватно опи­сы­вающих функционирование широкополосных беспроводных сетей.
This paper considers tandem queuing systems with limited buffer sizes in each phase. The system handles an incoming correlated MAP flow and the service time obeys a PH-distribution. Models of such systems and methods for their investigation are briefly reviewed from the historical perspective. According to the review, the problem statement presented below, the methods proposed for solving this problem, and the corresponding results are novel. An accurate algorithm for calculating the performance characteristics of low-dimensional tandem queuing systems is described, including an estimate of the algorithm’s complexity. An approach using both machine learning and simulation modeling is suggested for the investigation of high-dimensional tandem queuing systems. Numerical analysis results are provided to show the effectiveness of machine learning methods for estimating the performance of tandem queuing systems.
Способ идентификационного управления мостовым краном с новым расположением совмещенного датчика линейного ускорения и угловой скорости
Authors: Круглов С.П. , Ковыршин С.В. , Буторин Д.В. 
Published: October 2024

Рассмотрен способ автоматизации управления мостовым краном при текущей неопределенности его параметров, параметров переносимого груза и внешних возмущений. Целью управления является перемещение груза в горизонтальной плоскости в точку, обеспечивающую итоговую доставку груза в назначенное место с одновременным парированием угловых колебаний подвеса и обеспечением заданных динамических характеристик. Для этого применен подход, основанный на схеме управления с алгоритмом текущей параметрической идентификации, неявной эталонной модели и «упрощенных» условиях адаптируемости с нацеленностью на непосредственное отслеживание перемещения груза. Закон управления формирует заданную скорость тележки, отрабатываемую сервоприводом. При выборе параметров закона управления используются паспортные данные крановой установки. В отличие от ранее опубликованных работ по этой тематике предлагается решение, которое является более простым, надежным в эксплуатационном плане и менее дорогостоящим. Это достигается расположением совмещенного датчика, включающего акселерометр и датчик угловой скорости, на тросе подвеса около тележки крана, использованием алгоритмического решения, не требующего предварительного вычисления дрейфа датчика угловой скорости, и более эффективной процедуры текущей параметрической идентификации. Приведены результаты компьютерного моделирования, подтверждающие указанное. Аналогичный пример был реализован и на экспериментальной установке.
This paper is devoted to an automatic control method for an overhead crane under the current parametric uncertainty of the crane, transported cargo, and exogenous disturbances. The control objective is to move the cargo in the horizontal plane to a point ensuring the final delivery of the cargo to the designated place while parrying the angular oscillations of the suspension and reaching given dynamic characteristics. The approach is based on a control scheme with a current parametric identification algorithm, an implicit reference model, and “simplified” adaptability conditions to track cargo movements directly. The control law generates a given trolley speed for the servo drive. The passport data of the crane installation are used to select the control law parameters. Unlike previous publications on the topic, the solution proposed below is simpler, more reliable in terms of operation, and less expensive. This is achieved by placing a combined sensor (an accelerometer with an angular rate sensor (ARS)) on a suspension cable near the crane trolley and applying, first, an algorithmic solution without the preliminary calculation of the ARS drift and, second, a current parametric identification procedure of higher efficiency. Computer simulation results are provided to confirm these advantages of the new solution. A similar example is implemented on an experimental installation.
inonasal carcinoma (literature review and case report)
Authors: Spirin D.S. , Cherekaev V.A. , Chernov I.V. , Nersesyan M.V. , Tlisova M.N. , Popadyuk V.I. , Svyatoslavov D.S. , Reshetov I.V. 
Published: October 2024

Background. Adenocystic carcinoma is a rare malignancy originating from the epithelium of seromucinous major and minor salivary glands. It occurs most frequently in people aged 50-60 years, with a male-to-female ratio (3:2). This tumor accounts for less than 2% of all tumors of the nasal cavity and paranasal sinuses, but for 5-10% of all adenocarcinomas of the sinonasal region.Case description. In this article, we are aiming to demonstrate the importance of cancer awareness of a physician and describe the clinical case of a patient who was seen by an otorhinolaryngologist for 2 years with the diagnosis of allergic rhinitis, in fact being a patient with adenocarcinoma of nasopharyngeal localization. Conclusion. Adenocystic carcinoma is a tumor requiring long-term follow-up due to frequent local recurrences, distant metastases, and aggressive perineural growth. Cancer awareness of patients with typical complaints such as nasal congestion and epistaxis, especially unilateral, is important to perform surgical treatment as early as possible and improve the patient's prognosis
Актуальность. Аденокистозная карцинома является редкой злокачественной опухолью, происходящей из эпителия серомуцинозных больших и малых слюнных желез. Чаще всего встречается у людей в возрасте 50–60 лет с соотношением заболеваемости мужчин и женщин 3:2. На долю данной опухоли приходится менее 2% всех опухолей полости носа и околоносовых пазух, но 5–10% всех аденокарцином синоназальной области. Клинический случай. В данной статье мы показали важность онкологической настороженности врача и описали клинический случай пациентки, которая 2 года наблюдалась у оториноларинголога с диагнозом «аллергический ринит», будучи больной аденокарциномой назофарингеальной локализации. Заключение. Аденокистозная карцинома – это опухоль, требующая длительного динамического наблюдения в связи с частым развитием местных рецидивов, отдаленных метастазов и агрессивным периневральным ростом. Онкологическая настороженность пациентов с типичными жалобами, такими как затруднение носового дыхания и носовые кровотечения, особенно с одной стороны, имеет большое значение для как можно более раннего проведения хирургического лечения и лучшего прогноза.
THE RELATIONSHIP BETWEEN SUSTAINABLE MANUFACTURING OPERATIONS AND ENVIRONMENTAL PERFORMANCE OF PLASTICS AND RUBBER MANUFACTURERS IN KENYA: THE MODERATING EFFECT OF ECO-INNOVATIONS
Authors: Kaguara Angela Wairimu , Magutu Peterson Obara , Odock Stephen Ochieng 
Published: October 2024

Objective: This study aimed to expose the effect of sustainable manufacturing operations on performance of plastics and rubber manufacturing firms in Kenya.

Theoretical Framework: The main concepts and theories that support the research were conveyed. The study employed the natural resource-based view and ecological modernisation theory.

Method: The study employed descriptive research survey that targeted all the 90 plastics and rubber manufacturing firms registered by the Kenya Association of manufacturers. A structured questionnaire as well as a data collection form were useful in collecting data. For data analysis descriptive and inferential statistics were used with the precise inclusion of partial least squares structural equation modeling method.

Results and Discussion: There was a statistically significant influence of eco-innovations on the effect of sustainable manufacturing operations on environmental performance. However, the individual eco-innovations indicators namely eco-product innovations, eco-process innovations, green system innovations and material flow innovations yielded varied results.

Research Implications: The findings confirm previous studies that indeed there are positive gains made from the moderating role of eco-innovations in the correlation between sustainable manufacturing operations and performance of the environment.

Originality/Value: These results are expected to benefit stakeholders such as policy makers in government, plastic and rubber manufacturers and academia in augmenting the existing knowledge.
DEVELOPING A MULTIMEDIA POWERPOINT PRESENTATION ON THE HUMAN CIRCULATORY SYSTEM FOR JUNIOR HIGH SCHOOL STUDENTS IN PAPUA
Authors: Rusid Ibnu , Degeng I Nyoman Sudana , Sitompul Nurmida Catherine 
Published: October 2024

A biology curriculum consists of several topics that should be taught using appropriate media based on the type of information. The use of Multimedia PowerPoint is chosen because it is accessible without the need for an internet connection, making it a suitable solution for schools in Papua that lack infrastructure. This research aims to develop a Multimedia PowerPoint presentation on the Human Circulatory System for Junior High School students in Papua, with the goal of enhancing students' understanding of biology. The research method used is Research and Development, following the procedure outlined in the Borg & Gall Model. The developed product was reviewed by several experts and deemed viable. Subsequent assessment by students a yielded positive result. Questionnaires were used for assessment, and data analysis was conducted using percentages. The results of the development of the Multimedia PowerPoint on the Human Circulatory System are as follows: (1) The average assessment from material/content experts is 93%. (2) The average assessment from media experts is 100%. (3) The average assessment from design experts is 89%. (4) The average assessment from individual trials is 88%. (5) The average assessment from small group trials, is 90%. (6) The average assessment from large group trials is 91%. In conclusion, the Multimedia PowerPoint is a feasible instructional media for teaching the Human Circulatory System to Junior High School students, particularly in the Papua region.
Variasi Bahasa Pelaku Industri Pariwisata Dalam Interaksi Sosial Di Kabupaten Bangkalan
Authors: Susylowati Eka , Alfisuma Meria Zakiyah , Romadloni M. Imam 
Published: October 2024

Tujuan penelitian ini adalah untuk menjelaskan variasi bahasa yang digunakan oleh pelaku industri pariwisata dalam interaksi sosial di Kabupaten Bangkalan, Madura. Penelitian ini merupakan penelitian kualitatif yang mengambil lokasi penelitian di wilayah Kabupaten Bangkalan, Madura, Jawa Timur. Data penelitian ini merupakan tuturan pelaku industri pariwisata dengan wisatawan dalam situasi informal yang mengandung variasi bahasa. Pengumpulan data dilakukan dengan observasi dan wawancara. Analisis data dilakukan dengan metode SPEAKING. Hasil penelitian ini menunjukkan bahwa terdapat penggunaan variasi bahasa yaitu bahasa Indonesia, bahasa Inggris, bahasa Arab, dan bahasa Jawa sebagai media komunikasi antara pelaku industri pariwisata dengan wisatan dalam interaksi sosial.

Abstract

Keywords: language variation, tourism industry player, Sosiolinguistik, Bangkalan

The purpose of this study is to explain the language variations used by tourism industry players in social interactions in Bangkalan Regency, Madura. This study is a qualitative study that takes the research location in Bangkalan Regency, Madura, East Java. The data of this study are the speech of tourism industry players with tourists in informal situations that contain language variations. Data collection was carried out by observation and interviews. Data analysis was carried out using the SPEAKING method. The results of this study indicate that there is the use of language variations, namely Indonesian, English, Arabic, and Javanese as a medium of communication between tourism industry players and tourists in social interactions.
The Influence of Attractions, Facilities and Accessibility on Tourist Satisfaction at Parai Tenggiri Beach, Bangka Regency
Authors: Nopriana Anisa , Valeriani Devi , Kurniawan Kurniawan , Sugeng Novita Widyastuti 
Published: October 2024

This research aims to determine the influence of attractions, facilities and accessibility on tourist satisfaction. This type of research is quantitative descriptive research with multiple analysis methods. The total population in this study was 23,112 people based on January 2021 to December 2021, while the sample used the Slovin formula to be 100 respondents. The research results show that facilities and accessibility have a significant effect on tourist satisfaction. The natural beauty of the beach, with white sand and granite rocks, as well as recreational activities such as fishing and diving, add to the visitor experience. Adequate facilities and good accessibility also increase tourist comfort and satisfaction, encouraging them to return. Managers are expected to improve natural attractions, introduce new activities, and improve the quality of facilities such as toilets and eating places. Accessibility must also be considered with the development of transportation infrastructure and clear information about locations.
Keywords: attractions, accessibility facilities, tourist satisfaction
Consumer Purchase Decision and Brand Image Analysis Through Product Quality and Price: Study Case Frozen Pastry in Jakarta - Indonesia
Authors: Mumin Adhi Trirachmadi , Ingkadijaya Rahmat , Jason Jason , Muhardiansyah Doni , Wulan Saptarining 
Published: October 2024

The study investigates the effects of product quality and price on the purchasing decisions of Bonpatis Danish pastry sheets, with brand image acting as a mediator. Indonesia's food and beverage industry, mainly retail, is experiencing significant growth as modern retailers like Hypermart introduce competitive products. A quantitative approach was used, applying Structural Equation Modeling (SEM) with Partial Least Squares (PLS) to data collected from 83 respondents, mainly Hypermart bakery employees in DKI Jakarta. Results indicate that product quality and price positively influence brand image and purchasing decisions. Specifically, product quality boosts brand image and directly affects purchase decisions, whereas price influences purchase decisions directly but not via brand image. The study emphasizes the role of product appearance and packaging in shaping brand perceptions and suggests improving these elements to attract more consumers. Due to a limited sample size, the study recommends future research to explore broader aspects like customer satisfaction and loyalty.

Keywords: Danish pastry sheet, product quality, price, brand image, purchase decision.
Green Product dan Corporate Social Responsibility terhadap Purchase Intention yang Dimediasi oleh Brand Image pada Produk Tupperware di Kota Bandung
Authors: Chaeranieza Ghea Nazwa , Desmiza Desmiza 
Published: October 2024

The purpose of this study was to determine the effect of Brand Image and corporate social responsibility on Purchase Intention mediated by Brand Image on Tupperware product consumers in Bandung. This study involved a sample of 120 people with a purposive sampling technique. The type of data used is primary data, This research data comes from a questionnaire, The time horizon in collecting this research data is qualified as a cross-sectional or one shot study. To test the hypothesis in this study using multiple regression tests and Sobel tests. The results of this study indicate that green products and Corporate social responsibility have a positive effect on purchase intention, and Brand image mediates the relationship between green products and Corporate social responsibility on purchase intention.
Keywords: Brand Image, Corporate Social Responsibility, Purchase Intention, Green Product
Pengaruh Kualitas Produk terhadap Minat Beli Ulang yang Dimediasi oleh Kepuasan Pelanggan pada Produk Minuman Penambah Tenaga non Cair Extra Joss pada Mahasiswa program studi Manajemen
Authors: Ahmad Kherulyadi , Hafidh Nurmansyah Abdul Ahmad 
Published: October 2024

This study aims to determine the effect of product quality on repurchase intention mediated by customer satisfaction on non-liquid energy drink product extra joss, especially for students of management study program. The research instrument used has passed validity and reliability tests. This data collection tool is used to interview respondents aged 16-40 years who have experience consuming extra joss products. A total of 119 respondents participated in this study. The data collection method used is cross-sectional or one shot study. Data analysis was carried out using a quantitative descriptive approach, normality test, simple regression, multiple linear regression using SPSS version 24 software, and the use of the sobel test. Of the four hypotheses proposed, two of them are supported by empirical findings. The results of this study indicate that product quality has a direct effect on repurchase intention mediated by customer satisfaction. Meanwhile, other concepts that can directly influence repurchase intention can be explained by future research. The implications of these findings provide benefits for the company or product manager being evaluated, namely Extra Joss, and similar industries, related to designing relevant strategies to improve the quality of these attributes.
Keywords: Product Quality, Customer Satisfaction, Repurchase Interest
A Simplified Model for Propeller Thrust in Oblique Flow
Authors: Patience Christian , Nahon Meyer 
Published: October 2024

New aircraft architectures are being proposed for unmanned aerial vehicles and air taxis, which include tilt-able motor and propellers. These propulsive units operate with a propeller axis at an angle oblique to the flight direction, and thus it is important to understand and model how thrust is produced by a propeller operating under these conditions. Propellers in oblique flow have been modeled using Blade Element Momentum Theory coupled to an inflow model, and the Vortex Lattice Method. In the present work, we develop a much simpler approach that neglects the crossflow component of the incoming air velocity. An advance ratio is developed based on the parallel inflow component, and is coupled to existing propeller data collected in axial flow conditions. The proposed model is evaluated using existing experimental data collected under oblique flow conditions, and is predicts thrust to within \(5\,\%\) of experimental values for most conditions. The greatest discrepancy between the model and experiments occurs in the pure crossflow case, which is of lesser importance in the application to unmanned aerial vehicles and air taxis.
Analisis perubahan kesehatan ekosistem Kebun Raya di Provinsi Lampung
Authors: Safe'i Rahmat , Gunawan Rhezdanhy 
Published: October 2024

Pemantauan perubahan kondisi ekosistem dapat dijadikan sebagai bentuk evaluasi terhadap faktor-faktor yang mempengaruhi pengelolaan keberlanjutan. Tujuan penelitian ini yaitu mengetahui nilai akhir perubahan kesehatan ekosistem Kebun Raya di Provinsi Lampung. Tahapan yang dilakukan pada penelitian, antara lain: observasi untuk penetapan dan pembuatan plot ukur; pengukuran parameter dan penilaian akhir kesehatan ekosistem kebun raya menggunakan teknik Forest Health Monitoring (FHM). Hasil penelitian menunjukkan bahwa pada Kebun Raya Liwa (KRL) terjadi kenaikan nilai dan kategori dari pengukuran pertama ke kedua, adapun pada Kebun Raya ITERA (KRI) mengalami penurunan. Secara ekologis, kenaikan dan penurunan ini dipengaruhi oleh ketersediaan unsur hara, dan faktor hama penyakit pohon. Kedua faktor tersebut signifikan mempengaruhi kondisi pohon seperti kerusakan pohon, kondisi tajuk, kesuburan tanah, dan produktivitas tegakan. Selain itu pihak pengelola dan stakeholders memberikan kontribusi terhadap upaya pemeliharaan terhadap Kebun Raya. Dengan demikian, Kebun Raya di Provinsi Lampung mengalami fluktuasi nilai perubahan pada kondisi kesehatan ekosistem..
The effectiveness of modern fungicides in the protection of grain crops
Authors: Astarkhanova T. S. , Alibalaev D. A. , Alibalayeva L. I. , Abasova T. I. 
Published: October 2024

Sanitary monitoring of spring wheat agrocenosis in the zone of unstable moisture was carried out to determine the degree of development and prevalence of diseases. The fungicidal activity and effectiveness of seed protectants of various classes against seed infection on spring wheat variety Yasenka have been studied. The results of the research established the effectiveness of the disinfectant DVD Chance, KS, corresponding to 85.7% relative to the effectiveness of the standard Polaris, ME Eco Plus (100 g/l prochloraz + 25 g/l imazalil + 15 g/l tebuconazole) (84.6%). An increase of 15–20% in damage to spring wheat plants by root and basal rot caused by fungi of the genus Fusarium in the “tillering” phase and its dependence on the climatic conditions of the growing season was established.By the “flag leaf” phase, the prevalence of root and basal rot caused by fungi of the genus Fusarium increased to 20,5%, and the degree of development — to 7–9%.Evaluation of the effect of the fungicide DVD Chance, KS (30 g/l difenoconazole + 6.3 g/l cyproconazole) by pre-sowing treatment of spring wheat grain of the Yasenka variety established the effectiveness of the drug at a consumption rate of 1.0 l/t against molding of seeds, corresponding to 85.6% , in the reference variant the indicator is 84.6%, with the development of the disease in the control — 34.5%. By harvest, the effectiveness of the drug remained and reached 79.2%, in the standard — 78.3% with the development of the disease 43.7%. Research contributes to the expansion of the range of fungicides for treating grain crops, the development of regulations for use and the possibility of recommending them for registration tests for further inclusion in the State Catalog of those approved for use.