161,014 research outputs found
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Renewable Electricity Sources Selection Based on the Economy Applied Approach
No full textА. Antonov: ORCID 0000-0001-5701-6087,
D. Bosyi: ORCID 0000-0003-1818-2490ENG: The aim of the work is to develop an economically justified approach to the selection of renewable sources of electricity. This aim is achieved by construction an automated algorithm that takes into account a set of restrictions for creating the optimal structure of a photovoltaic station. The work confirms the influence of such factors on project implementation as: electricity consumption schedule, built-up area, photovoltaic station mounting system type, allocated amount of money for project implementation, fixed and variable costs for maintenance of photovoltaic station, cost of electricity. The results of an economically justified approach to the selection of renewable sources of electricity at a real photovoltaic station are given. Indicators such as pay-back period and cash flow were calculated, which show the feasibility of the proposed approach.UKR: Метою роботи є розробка економічно обґрунтованого підходу до вибору відновлюваних джерел електроенергії. Ця мета досягається шляхом побудови автоматизованого алгоритму, що враховує набір обмежень для створення оптимальної структури фотоелектричної станції. У роботі підтверджено вплив на реалізацію проекту таких факторів як: графік споживання електроенергії, площа забудови, тип системи монтажу фотоелектричної станції, виділена сума коштів на реалізацію проекту, постійні та змінні витрати на обслуговування фотоелектричної станції, вартість електроенергії. Наведено результати економічно обґрунтованого підходу до вибору відновлюваних джерел електроенергії на реальній фотоелектричній станції
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Компьютерные вычисления и оптимизация для систем электроснабжения постоянного тока электрического транспорта
No full textD. Bosyi: ORCID 0000-0003-1818-2490; O. Sablin: ORCID 0000-0001-6784-648X; Ye. Kosariev: ORCID 0000-0003-3574-7414ENG: In the modern world, further development of society is impossible without environmentally friendly modes of transport and their effective interaction within the framework of Smart Energy and ECO-driving concepts. Written at a time of rapid development of information technologies in various fields, this book serves as a kind of bridge for the introduction of artificial intelligence into the electric transport power supply systems. The calculation models and methods proposed make it possible to choose the most efficient modern equipment for electric power supply of electric vehicles, which, as a result, saves investment costs and reduces time to make decisions for designing complex objects. Insight is also given into building and adjusting Smart Energy class equipment to achieve optimal and economical modes.UKR: У сучасному світі подальший розвиток суспільства неможливий без екологічно чистих видів транспорту та їх ефективної взаємодії в рамках концепцій Smart Energy та ECO-Driving. Написана в часи бурхливого розвитку інформаційних технологій у різних галузях, ця книга служить своєрідним мостом для впровадження штучного інтелекту в електромережі електропостачання.
Запропоновані розрахункові моделі та методи дозволяють вибрати найбільш ефективне сучасне обладнання для електропостачання електромобілів, що, як результат, економить інвестиційні витрати та скорочує час для прийняття рішень щодо проектування складних об'єктів. Також надається розуміння для створення та налаштування обладнання Smart Energy для досягнення оптимальних та економічних режимів
Larry O. Spencer, Conference Author Presentation
No full textGen. Larry O. Spencer, USAF (Ret.), author of Dark Horse: A Journey from the Horseshoe to the Pentago
Embedded AI for Audio-Based Drone Detection in Critical Railway Infrastructure
No full textD. Bosyi: ORCID 0000-0003-1818-2490; O. Sablin: ORCID 0000-0001-6784-648X; I. Potapchuk: ORCID 0000-0002-5985-1040; A. Usenko: ORCID 0000-0002-1782-9224ENG: Summary. With the increasing threat of unmanned aerial vehicles to critical railway infrastructure, the need for advanced detection technologies has become more urgent. This paper reviews existing railway monitoring solutions and outlines their limitations in identifying aerial threats. An acoustic analysis is conducted to extract distinctive unmanned aerial vehicle sound patterns using Mel-frequency cepstral coefficients, which serve as primary features for classification. Neural network models are applied to detect and differentiate aerial threats from environmental noise, achieving high recognition accuracy. The study also describes the development of an embedded artificial intelligence system based on STM32 microcontrollers, which combines real-time digital signal processing with efficient on-device neural inference. This solution offers a scalable and energy-efficient platform for decentralized audio-based drone detection in railway security applications
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Energy Efficient Modes of Distribution Power Supply Systems with Different Vector Group of Transformer
No full textD. Zemskyi: ORCID 0000-0003-4322-0727; D. Bosyi: ORCID 0000-0003-1818-2490EN: The article is devoted to the experiment, what was performed on the local distribution networks with poort power quality. As a rule, these networks are subsystem of AC traction power supply system, and their design causes voltage unbalance and other power quality problems in consumers.Often, the network is powered by transformers with different vector groups, therefore their parallel operation is impossible. The purpose of the experiment is to assess the effect on energyquality of a regime with sources on both sides. The quality of electrical energy was estimated, considerable attention is devoted to unbalance voltage. Using the statistics methods measurement data are studied. During the experiment, the energy quality improved when the parallel mode was used. The tconcept of smart grid has been proposed to reduce energy losses for dynamic power management.RU: Статья посвящена эксперименту, проведенному на распределительных сетях с низким качеством электроэнергии. Как правило, эти сети являются подсистемой системы тягового электроснабжения переменного тока, а их конструкция вызывает дисбаланс напряжения и другие проблемы с качеством электроэнергии у потребителей. Зачастую сеть питается от трансформаторов с различными группами векторов, поэтому их параллельная работа невозможна. Цель эксперимента - оценить влияние на качество энергии при переводе на двустороннее питание исследуемого участка. Было оценено качество электрической энергии, значительное внимание уделено дисбалансу напряжения. С использованием методов статистики анализировались данные измерений. В ходе эксперимента качество энергии улучшилось вовремя двустороннего питания. Для снижения потерь энергии и динамическим управления режимами предложено концепцию Smart Grid.UK: Стаття присвячена експерименту, проведеного на розподільчих мережах з низькою якістю електроенергії. Як правило, ці мережі є підсистемою системи тягового електропостачання змінного струму, а їх конструкція викликає дисбаланс напруги та інші проблеми з якістю електроенергії у споживачів. Найчастіше мережу жівиться від трансформаторів з різними групами векторів, тому їх паралельна робота неможлива. Мета експерименту - оцінити вплив на якість енергії при переведенні на двостороннє живлення досліджуваної ділянки. Авторами було оцінено якість електричної енергії, значна увага приділена дисбалансу напруги. З використанням методів статистики проаналізовано дані вимірювань. Підчас експерименту якість енергії покращілась за режіму двостороннього жівлення. Для зниження втрат енергії і динамічного управління режимами запропоновано концепцію Smart Grid
Intelligent Technologies for Efficient Power Supply in Transport Systems
No full textD. Bosyi: ORCID 0000-0003-1818-2490, O. Sablin: ORCID 0000-0001-6784-648X, I. Khomenko: ORCID 0000-0002-1026-2720, Ye. Kosariev: ORCID 0000-0003-3574-7414, I. Kebal: ORCID 0000-0002-8408-8294, S. S. Myamlin: ORCID 0000-0002-9204-4435EN: The main directions of development of the energy-saving technologies in electrified transport systems are considered in the article with taking into account the
flexible regulating features of modern power equipment. The proposed theory and principles of functioning allow understanding the optimal control laws for converters,
accumulators, and renewable energy sources in their integration into traction power supply systems. Research opens the possibility of the installed power of the required
equipment in minimizing and reducing the capital costs for energy-saving technologies. Also, combination of all developed approaches will provide the system effect
Numerical Modeling of the Thermal Characteristics of a Fan Spray Cooling Tower
No full textO. Zhevzhyk: ORCID 0000-0002-8938-9301;
I. Potapchuk: ORCID 0000-0002-5985-1040;
V. Pertsevyi: ORCID 0000-0002-4322-7921;
D. Bosyi: ORCID 0000-0003-1818-2490ENG: The work constructs a mathematical model of the heat and mass transfer process in a spray cooling tower. The mathematical model consists of the equations of motion and heat and mass transfer of water droplets and the equations of thermal and material balance of moist air, considers the polydispersity of the droplet flow and allows to calculate the cooling capacity of the cooling tower depending on the parameters of the droplet flow. The mathematical model is confirmed by the results of industrial tests of irrigation-free cooling towers. The simulation results show that the cooling capacity of a spray fan cooling tower significantly depends on the atomization dispersion and the height of the water cutting nozzles. Reducing the average diameter of the droplet flow to less than 2 mm and increasing the height of the nozzles H > 4...5 m make it possible to achieve the cooling performance of known cooling towers with nozzle. The mathematical model allows to calculate the cooling capacity of the cooling tower and determine the necessary individual parameters of the droplet flow for each type of equipment and consumers for which the specific energy costs for cooling is minimal
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