bluuebunny/crossref_metadata_2025 huggingface dataset:
İSHAKZÂDE ZUHÛRÎ’NİN MEKTÛBÂT ADLI ESERİNE DAİR
Authors: KAHRAMAN Özlem
Published: April 2023

İnsanın haberleşme gereksiniminin karşılanmasından doğan mektup, fikir ve sanat hayatının tekamül etmesiyle birlikte şekil ve muhteva bakımından gelişerek çeşitlenmiştir. Başlangıçta maksadın sade, açık ve öz bir dille muhataba aktarılmasını amaçlayan mektuplar, zaman içerisinde hüner gösterilmeye müsait bir sanat dalı hâlini almıştır. Bilhassa Osmanlı döneminde mektup doğru, güzel, edebî yazı yazmayı konu edinen inşa ilminin alt dallarından biri addedilmiş; şekil ve tür bakımından birtakım kurallarla kayıt altına alınmıştır. Geleneğin belirlediği kurallara uygun nesir inşa etmenin inceliklerinden söz eden münşeat mecmularında mektup kaidelerine ve örneklerine de yer verilmiştir. Söz konusu mecmualardan inşa ve kitabet sanatına yeni başlayan talebelere yol gösterecek şekilde sade bir dille kaleme alınmış olanı da vardır; bu sahada ustalaşmak isteyenlerin talim yapabileceği nitelikte süslü bir dille yazılmış olanı da vardır. Münşeat mecmuaları sayesinde kendilerini geliştirme imkanı bulan münşiler, bu alanın kurallarına vâkıf olduklarını ispatlamak, sanat kudretlerini göstermek amacıyla aynı maksadı değişik şekillerde ifade eden çok sayıda mektuplar kaleme almışlardır. Mektup artık nazım ve süslü nesir gibi sanatkarın hünerini sergileyebileceği bir alan hâline gelivermiştir. İshakzâde Mehmed Salih Zuhûrî’nin farklı içeriklerde, sanatkarane bir üslupla kaleme aldığı Mektûbât adlı eseri de bu mektuplara bir örnek teşkil etmektedir. Zuhûrî’nin muhtelif kişilere, farklı içeriklerde kaleme aldığı mektuplar şairin torunu Ebu İshakzâde Lutfullâh tarafından bir araya getirilmiş; böylece Mektûbât adlı eser ortaya çıkmıştır. Eserin bilinen yegâne nüshası Paris Bibliothèque Nationale Kütüphanesi, Türkçe El Yazmaları Bölümü 1 à 1419 numarada kayıtlıdır. Bu makalede önce tarafımızdan yayıma hazırlanacak olan bu nüshanın tanıtımı yapılacak; ardından eserin şekil ve muhteva özelliklerine değinilecektir.
Artificial intelligence-based technology for enhancing the quality of simulation, navigation, and outcome prediction for hepatectomy
Authors: Shinkawa Hiroji , Ishizawa Takeaki
Published: April 2023

In the past decade, artificial intelligence (AI)-based technology has been applied to develop a simulation and navigation system and a model for predicting surgical outcomes in hepatobiliary surgery. To identify the intrahepatic vascular structure and accurate liver segmentation and volumetry, AI technology has been applied in three-dimensional (3D) simulation software. Recently, 3D and 4D printing have been used as innovative technologies for tissue and organ fabrication, medical education, and preoperative planning. AI can empower 3D and 4D printing technologies. Attempts have been made to use AI technology in augmented reality for navigating and performing intraoperative ultrasound. To predict surgical outcomes and postoperative early recurrence in patients with hepatocellular carcinoma, a deep learning model can be useful. Indocyanine green fluorescence imaging is used in hepatobiliary surgery to visualize the anatomy of the bile duct, hepatic tumors, and hepatic segmental areas. AI technology was applied to fuse intraoperative near-infrared fluorescence and visible images. Preoperative simulation, intraoperative navigation, and models to predict surgical outcomes using AI technology can be clinically applied in hepatobiliary surgery. As shown in reliable and robust clinical studies, AI can be a useful tool in clinical practice to improve the safety and efficacy of hepatobiliary surgery.
ТРАКЦІЙНИЙ ПРИСТРІЙ ДЛЯ ЕНДОВАСКУЛЯРНОЇ ЛАЗЕРНОЇ ОКЛЮЗІЇ ВЕН
Authors: Козяр Василь , Тарасова Лариса , Буренко Ярина
Published: April 2023

У статті розглянуто методи та прилади для лікування варикозної хвороби. На основі огляду літературних джерел сформульовано медико-технічні вимоги та розроблено блок-схему пристрою. Проведено вимірювання опору, який чинить гемостатичний клапан інтродуцера просуванню світловоду. Виконані розрахунки сили тертя, яка виникає між світловодом і валиками при різних умовах. Виконані вимірювання сили тяги в залежності від сили затиску світловоду між ведучим і пасивним валиками, а також момент сили  ведучого валу За результатам вимірювань встановлено, що для ефективної тракції світловоду із постійною швидкістю достатньо, щоб сила притиску пасивного валика перевищувала 4 Н.

Ключові слова: варикоз, лазер, оклюзія, світловод, тракція.
ІНТЕЛЕКТУАЛЬНІ РЕГІСТРАТОРИ ЛЕГЕНЕВОГО ШУМУ
Authors: Висоцька Олена , Гламаздін Володимир , Кривенко Олена , Луценко Владислав , Луценко Ірина , Шубний Олександр , Попова Кіра , Бабаков Михайло
Published: April 2023

У роботі розроблено схеми використання найпростішого одноканального пристрою для бездротової реєстрації легеневих шумів на смартфоні та чотириканального пристрою на базі мікроконтролера для одночасної реєстрації легеневих шумів у різних відділах грудної клітки пацієнта та поза грудною кліткою. Виготовлено дослідні зразки таких пристроїв, суміщених з мікрофонами за допомогою допоміжного обладнання. Були зроблені пробні записи легеневих шумів і бездротова передача на смартфон. Показано, що використання байтового формату запису з частотою 8 кГц є достатнім для забезпечення необхідного динамічного діапазону для подальшого аналізу шуму. Апарат змонтований в легкому пластиковому корпусі, який кріпиться до одягу пацієнта і дозволяє тривалий (до 24 годин) безперервний моніторинг дихання. Автономність його роботи забезпечується наявністю літій-іонного акумулятора, з можливістю заряджатися від будь-якого джерела постійного струму 5 В, наприклад від USB-порту від ПК або від зарядного пристрою смартфона. Передача даних моніторингу бездротова за допомогою Bluetooth. Отримано: структурні та принципові схеми одно- та багатоканальних датчиків електроаускультації легень з бездротовим каналом передачі даних, що відкриває нові можливості для створення автоматизованих одно- та багатоканальних систем діагностики стану легені. Зроблено висновок, що створені одно- та багатоканальні датчики за своїми технічними можливостями повністю відповідають потребам автоматизованих систем діагностики стану легень за акустичним шумом.

Ключові слова – акустичний шум, виявлення легеневих патологій, диференціальна діагностика шуму, чотириканальний пристрій, спектри шуму, фази дихання, одноканальний пристрій.
ВПЛИВ НЧ-МАГНІТНИХ ПОЛІВ НА КЛІТНИ, ТКАНИНИ ТА ОРГАНИ ЛЮДИНИ
Authors: Шликов Владислав , Вовянко Світлана
Published: April 2023

У роботі розглянуто основні підходи ряду авторів до аналізу електромагнітних процесів, що відбуваються в організмі людини на молекулярному та клітинному рівнях. Описано особливості впливу магнітного поля на органічні сполуки та біологічні системи. Сформульовано фундаментальні положення механізмів дії магнітного поля та їх теоретичні обґрунтування. Представлені резонансні ефекти поглинання в біологічних середовищах та перехідні процеси в них, що супроводжуються дисперсією діелектричних властивостей та провідності тканин. Наведено кілька магнітних включень у тканинах, що зумовлюють різну залишкову намагніченість ділянок тіла та різні електромагнітні спектри поглинання.

 Ключові слова магнітне поле, резонансні ефекти, залишкова намагніченість, біологічні системи
ПРОЦЕС ІДЕНТИФІКАЦІЇ УРАЖЕНЬ ЛЕГЕНІВ НА ЗНІМКАХ КОМП’ЮТЕРНОЇ ТОМОГРАФІЇ ПРИ COVID-19
Authors: Давидько Олександр , Матвійчук Олександр
Published: April 2023

У поточному дослідженні розглядається розробка 4-етапного процесу для ідентифікації уражень легень спричинених COVID-19. Система, що реалізує даний процес використовує згорткові та повнозв’язні нейронні мережі, логістичного самоорганізованого лісу із формуванням вирішального класифікаційного правила за принципами методу групового урахування аргументів. Дана система також містить механізм для обчислення відносного об’єму ушкодження легенів. Підсистема для пошуку зображень з ураженнями досягла якості класифікації з коефіцієнтом кореляції Метьюза 0,98. Підсистема для сегментації уражень досягла метрики Dice score 0,74, а система для класифікації уражень досягла F1-score 1, 0,95, 0,93 для типів ураження «матове скло», «бруківка», «консолідація» відповідно. Результати демонструють ефективність реалізованого багаторівневого рішення при розв’язанні завдань ідентифікації та класифікації уражень легенів.

Ключові слова: текстурний аналіз, нейронні мережі, метод групового урахування аргументів, COVID-19, медичні зображення
АЛЬТЕРНАТИВНІ МЕТОДИ ОЦІНКИ БЕЗПЕЧНОСТІ КОСМЕТИЧНОЇ ПРОДУКЦІЇ НА ОСНОВІ IN VITRO МОДЕЛЕЙ
Authors: Дронько Лілія , Луценко Тетяна
Published: April 2023

Керуючись новими нормативними вимогами, що введені 7-ою поправкою до Регламенту Європейського парламенту та Ради Європейського Союзу № 1223/2009 «Про косметичні засоби» дослідники в галузі косметичної промисловості зобов’язані розробити та оцінити альтернативні стратегії тестування, такі як аналізи in vitro, підходи in silico для токсикологічних аналізів та досліджень ефективності косметичних продуктів та косметичних інгредієнтів. Як наслідок, Європейський центр перевірки альтернативних методів (ECVAM) затвердив список валідованих клітинних моделей in vitro для прогнозування безпеки та токсичності косметичних інгредієнтів. Ці моделі є ефективними та альтернативними інструментами для подолання обмежень досліджень на тваринах in vivo, в звязку з слідуванню принципу 3R. Оскільки всі дослідження, що проводяться на тваринах є жорстокими по відношенню до піддослідних тварин, під час яких вони зазнають страждань і гинуть. Проте досі існують методики, що не мають альтернативи серед in vitro методик. У цьому огляді представлено основні альтернативні моделі in vitro, які використовуються в тестах безпеки косметичних продуктів, що зосереджені на сенсибілізації шкіри, роз’їданні шкіри, подразненні шкіри та поглинанні шкірою. Також наведено огляд використання 3Д технологій, які є перспективним для оцінки токсичності речовин, що містяться в косметиці, особливо для аналізу токсичності повторних доз, для якого наразі немає альтернативних методів in vitro. Проте ці технології, потребують доопрацювання і проведення перевірки та прийняття регуляторними органами як ефективний метод. Для досягнення цієї перевірки знадобиться співпраця між дослідниками, регуляторними організаціями та промисловістю. Для українського ринку косметичних продуктів робота над альтернативою in vivo дослідженням, які передбачають використанням лабораторних тварин, також являється важливим та перспективним напрямом. Таке як відбувається гармонізація нормативного законодавства України з законодавством Європейського Союзу, і введення в дію вимог технічного регламенту щодо косметичної продукції передбачається в серпні 2024 року.

Ключові слова: in vitro тести, безпечність, токсикологія, дерматологічні засоби, альтернативні варіанти тестування на тваринах, косметичні продукти, Технічний регламент
Economic Processes in Georgia in the Сontext of New International Realities
Authors: Fedorovskaya I.
Published: April 2023

Georgia has been demonstrating double-digit GDP growth rates for the second year in a row. If in 2021 this growth was associated with a post-pandemic recovery, in 2022 a special contribution to the development of the Georgian economy was made by income from growing tourism and increased remittances from Russia many times over. The new international political reality that has developed in the world since the beginning of the Russian-Ukrainian conflict has also had an impact on the increase in trade flows now going through Georgia. Under the influence of rapid economic growth, the government has developed four main directions of Georgia’s development for the future – the transformation of the country into a transport, energy, technological and financial hub.
The Karabakh Knot of Caucasian Politics
Authors: Krylov A.
Published: April 2023

This article analyses the Karabakh problem, the politics of the conflicting parties, Russia and other countries after the First Karabakh War (1992–1994). The focus is on the results of the Second Karabakh War (September 27 – November 10, 2020) and reasons for the maintenance of a high level of tension in the region. The author concludes that the situation is developing in the direction of a new military confrontation, and not on the path of a peaceful settlement. The desire of the conflicting parties to use the Russian factor exclusively in their own interests contradicts the position of the leadership of the Russian Federation, which strives to preserve its neutral position of the mediator who contributes to the resolution of the conflict through negotiations and the development of mutually acceptable solutions. In 2021–2022 numerous formal peacemaking initiatives of the USA and its allies did not lead to a reduction in tension, but allowed to block the process of a peaceful settlement under the mediation and auspices of Russia, to create prerequisites for the liquidation of the Russian military presence in Nagorno-Karabakh and in Armenia. Thus, the policy of the collective West increased the probability of new shocks and military conflicts in the South Caucasus.
Priorities of Ashgabat’s Foreign Policy
Authors: Ionova E.
Published: April 2023

After coming to power, S. Berdimuhamedow continued the course outlined by his father, the former president of the republic, to intensify relations with Russia, China and Turkey, the main foreign policy partners of Turkmenistan. For their part, the authorities of these countries are increasing their attention to Turkmenistan, based on their own goals. At the same time, if Beijing’s interest in this Central Asian republic has long materialized into large-scale gas and transport projects, then Moscow is speeding up cooperation with Ashgabat after a rather long break. The intensification of relations between Turkmenistan and Russia is in the interests of both countries: in the changed international conditions Russia needs new markets and export routes, while Turkmenistan can and is already deriving economic benefits from the development of trade and investment cooperation with the Russian Federation. As for Turkey, Ashgabat is reserved about R.Erdogan’s pan-Turkist ambitions, but shows interest in the gas projects he is promoting, which provide for the transportation of Turkmen gas to Europe bypassing Russia.
Kazakh-Russian Relations in Light of Western Sanctions Pressure
Authors: Shegirbayev O.
Published: April 2023

Currently, Russia has found itself under unprecedented sanctions pressure from the countries of the collective West in connection with the military conflict in Ukraine. Sanctions as an instrument of influence aim to change the internal political course in the sanctioned country and are one of the additional levers to influence the partner countries. Kazakhstan is one of its main partners of Russia in the Eurasian Economic Union, and bilateral trade, economic, and investment relations are actively developing. The article discusses how sanctions have affected bilateral cooperation between Kazakhstan and Russia. The data of national statistics as well as of the National Bank of Kazakhstan were used. At the same time one of the threats to bilateral relations are the statements of several political actors, political scientists and political technologists of the Russian Federation.
Ortaokul Öğrencilerine Yönelik Kültürel Miras ve Korunması Eğitimi; Antalya, Döşemealtı Kovanlık Köyü Ortaokulu Örneği
Authors: KULELİ Ayşe Esin , BÖLÜKBAŞ DAYI Esin , AKDEĞİRMEN ERCAN Selin , KİŞTİN Serim Aygen
Published: April 2023

Kültürel mirasın korunması konusunda kamu bilincinin gelişimi için farklı yaş grupları ve farklı düzeyler için örgün ve yaygın eğitim modellerinin geliştirilmesi ve aktif olarak uygulanması önemlidir. Bu çalışmada, Antalya Bilim Üniversitesi Mimarlık Bölümü tarafından Kültür ve Turizm Bakanlığı, ÇEKÜL ve AKMED işbirliğiyle düzenlenen ve Antalya Döşemealtı Kovanlık Köyü Ortaokulu öğrencilerinin katıldığı “Kültürel Miras ve Korunması” konulu eğitim programının hazırlık ve uygulama süreçleri aktarılmış, süreç sonunda elde edilen deneyimler ve analizler ışığında eğitim modelleri için öneriler geliştirilmiştir. Eğitime katılan 5. ve 6. sınıf öğrencilerinin Sosyal Bilgiler derslerinde kültür varlığı ve koruma konusunda almış oldukları eğitimin içeriği incelenmiş, Antalya Bilim Üniversitesi Mimarlık Bölümü tarafından kültürel miras konusunda düzenlenen üç günlük eğitimin, Milli Eğitim Bakanlığı müfredatını destekleyici ve pekiştirici olduğu görülmüştür. Eğitim sürecinde farkındalık yaratmak, dinamik öğrenme ortamları oluşturmak ve bellek oyunları ile bilgileri içselleştirmek için geliştirilen metotlarla kolektif bir öğrenme ortamının oluşturulması ve öğrencilerde somut ve somut olmayan kültürel varlıkların korunması konusunda kalıcı bir farkındalık ve bilinç düzeyi kazandırılması amaçlanmıştır. Eğitim sonunda yapılan değerlendirme anketleri frekans değerlendirme ve içerik çözümlemesi yöntemleri ile analiz edilmiş ve öğrencilerin kültürel miras konusunda edindikleri bilgiler ve öğrendikleri bilgileri uygun şekilde kullanma becerileri incelenmiştir. Eğitim sürecinde elde edilen deneyimler, gelecekte gerçekleştirilmesi planlanan daha kapsamlı eğitim programları için bir rehber olma potansiyeline sahiptir.
A Social Cognitive Assessment of Workplace Sedentary Behavior among a Sample of University Employees
Authors: Wilkerson Amanda H. , Abutalib Nuha , McFadden Ny'Nika T. , Bhochhibhoya Shristi , Dragicevic Adriana , Salous Bushra R. , Nahar Vinayak K.
Published: April 2023

Sedentary behavior (SB) is an important public health concern. Adults working in desk-based occupations spend a considerable proportion of the workday sitting. More information is needed regarding the factors that contribute to occupational SB. The aim of this study was to assess the utility of social cognitive theory (SCT) to explain work-related SB using a quantitative, cross-sectional design by administering an online questionnaire. Participants included 381 full-time employees at a large, public university in the south-central United States. Hierarchical multiple linear regression was used to determine the relationship between SCT constructs and SB. Mean work-related SB was 6.08 (SD = 1.59) hours/day. In model 1, 9.6% of the total variance in SB was accounted for by standing desk ownership and physical activity level (p=0.001; R2=0.096). In model 2, SCT constructs led to a statistically significant R2 increase of 4.9% (p < 0.001, where standing desk ownership, physical activity, and self-efficacy explained 13.3% of the variance in work-related SB. Findings from this study suggest that self-efficacy may be an important factor in explaining variation in occupational SB. Public health researchers and practitioners should consider strategies to address employees’ self-efficacy when developing workplace interventions to target occupational SB.
Comparison of Various Psychological Human Needs Model with Schema Therapy
Authors: Louis John Philip
Published: April 2023

Several theories have been proposed on the subject of fundamental psychological human needs. A brief overview was given for some of these major theories. A more recent theory on core emotional needs, derived from the vantage point of schema therapy, was also proposed and comparisons were drawn with the other models, each with different psychological boundaries. Implications and what these psychological needs mean to parents were also discussed covering cultural norms that may inadvertently inflict harm on young children and adolescents.
V2G Strategies to Flatten the Daily Load Curve in Seoul, South Korea
Authors: Choi Sangbong , Kim Changsoo , Sung Backsub
Published: April 2023

This paper presents a V2G strategy to flatten the daily load curve by considering the charging and discharging location of the electric vehicle to help understand the effect of the load generated by charging and discharging of the electric vehicle on the power grid. Based on the estimated share of electric vehicles, the assumption that electric vehicles go to work in the morning and leave in the afternoon was set, and the electric vehicle discharge power was calculated by reflecting both the characteristics of vehicles that go to work in the morning and the SMP1 and SMP2 plans. In addition, the electric vehicle charging power was calculated by reflecting the characteristics of vehicles returning home from work in the afternoon and the TOU rate system. In other words, in order to establish an efficient V2G strategy, a charging/discharging type-specific modeling was developed that considered all the characteristics of an electric vehicle commuting vehicle, and charging and discharging daily load using SMP1 and SMP2 rate plans for morning discharge and TOU1 and TOU2 rate plans for afternoon charging were applied. After calculating the curve, this value was compared and analyzed to evaluate the effect on grid leveling by adding the existing load. The analysis provides an accurate understanding of the impact of EV charging and discharging loads on the power grid according to V2G strategies. In this paper, it is helpful to apply EV charge and discharge management technology to avoid grid overload and minimize grid expansion by leveling the grid daily load curve by applying appropriate SMP and TOU rates through the establishment of an efficient V2G strategy by charge and discharge modeling.
Wavelet packet analysis for rotor bar breakage in an inverter induction motor
Authors: Abu Ibaid O. Z. I. , Belhamdi S. , Abid M. , Chakroune S. , Mouassa S. , Al-Sagar Z. S.
Published: April 2023

Introduction. In various industrial processes, squirrel cage induction motors are widely employed. These motors can be used in harsh situations, such as non-ventilated spaces, due to their high strength and longevity. These machines are subject to malfunctions such as short circuits and broken bars. Indeed, for the diagnosis several techniques are offered and used. Novelty of the proposed work provides the use of wavelet analysis technology in a continuous and discrete system to detect faults affecting the rotating part of an induction motor fed by a three-phase inverter. Purpose. This paper aims to present a novel technique for diagnosing broken rotor bars in the low-load, stationary induction machine proposed. The technique is used to address the problem of using the traditional Techniques like Fourier Transforms signal processing algorithm by analyzing the stator current envelope. The suggested method is based on the use of discrete wavelet transform and continuous wavelet transform. Methods. A waveform can be monitored at any frequency of interest using the suggested discrete wavelet transform and continuous wavelet transform. To identify the rotor broken bar fault, stator current frequency spectrum is analyzed and then examined. Based on a suitable index, the algorithm separates the healthy motor from the defective one, with 1, 2 and 3 broken bars at no-load. Results. In comparison to the healthy conditions, the recommended index significantly raises under the broken bars conditions. It can identify the problematic conditions with clarity. The possibility of detecting potential faults has been demonstrated (broken bars), using discrete wavelet transform and continuous wavelet transform. The diagnostic method is adaptable to temporary situations brought on by alterations in load and speed. Performance and efficacy of the suggested diagnostic method are demonstrated through simulation in Simulink® MATLAB environment.
Sensorless control of switched reluctance motor based on a simple flux linkage model
Authors: Fan J. , Lee Y.
Published: April 2023

Introduction. The operation of switched reluctance motor requires prior knowledge of the rotor position, obtaining from either low resolution photocoupler based position sensor or high resolution shaft encoder, to control the on/off states of the power switches. Problem. However, using physical position sensor in harsh environment will inevitably reduce the reliability of the motor drive, in which sensorless control comes into play. Novelty. In this paper, a sensorless control scheme of switched reluctance motor is proposed. Methodology. The method is based on a simple analytical model of the flux-linkage curves rather than the conventional approach that normally uses a look-up table to store all the data points of the flux-linkage curves. By measuring the phase current, rotor position can be deduced from the analytical model. Practical value. Simulation results are given and the proposed sensorless scheme is verified to provide a moderate position estimation accuracy in a wide speed range in both unsaturated and saturated conditions.
Direct power control using space vector modulation strategy control for wind energy conversion system using three-phase matrix converter
Authors: Boukadoum A. , Bouguerne A. , Bahi T.
Published: April 2023

Introduction. Wind energy conversion system is getting a lot of attention since, they are provide several advantages, such as cost competitive, environmentally clean, and safe renewable power source as compared with the fossil fuel and nuclear power generation. A special type of induction generator, called a doubly fed induction generator is used extensively for high-power wind energy conversion system. They are used more and more in wind turbine applications due to the advantages of variable speed operation range and its four quadrants active and reactive power capabilities, high energy efficiency, and the improved power quality. Wind energy conversion systems require a good choice of power electronic converters for the improvement of the quality of the electrical energy produced at the generator terminals. There are several power electronics converters that are the most popular such as the two stage back-back converter. Because of the disadvantage of these converters to produce large harmonics distortions, we will choose using of three-phase matrix converter. Purpose. Work presents a direct power control using space vector modulation for a doubly fed induction generator based wind turbine. The main strategy control is to control the active and reactive powers and reduce the harmonic distortion of stator currents for variable wind speed. The novelty of the work is to use a doubly fed induction machine and a three pulses matrix converter to reduce the low cost, volume and the elimination of the grid side converter controller are very attractive aspects of the proposed topology compared to the conventional methods such as back-to-back converters. Simulation results are carried out on a 1.5 MW of wind energy conversion system connected to the grid. The efficiency of the proposed system has been simulated and high results performances are evaluated to show the validity of the proposed control strategy to decouple and control the active and reactive power for different values of wind speed.
Ultimate effect of non-identity of resistive elements of high-voltage arm on frequency characteristics of broadband voltage divider (analytical research)
Authors: Brzhezitsky V. O. , Haran Y. O. , Trotsenko Y. O. , Protsenko O. R. , Derzhuk A. O. , Dixit M. M.
Published: April 2023

Purpose. Determination in the analytical form of the maximum limiting influence of the non-identity of the resistive elements of the high-voltage arm on the amplitude-frequency characteristic and phase-frequency characteristic of the voltage divider with parallel-series connection of R-, C-elements of the high-voltage arm. Methodology. Based on the previously developed theory of broadband voltage dividers with parallel-series connection of R‑, C-elements, analytical expressions for amplitude-frequency and phase-frequency characteristics of the voltage divider are obtained and investigated taking into account the limit case of non-identical resistive elements of high-voltage arm. Results. The nature of the dependencies of the frequency characteristics of the broadband voltage divider on the value of the tolerance of the resistive elements of the high-voltage arm, the division factor of the voltage divider in a wide range of frequency changes are determined. Simplified approximating expressions for the maximum values of frequency characteristics of the voltage divider are proposed and their error is determined. Originality. For the first time in the analytical form the limiting influence of non-identity of resistive elements of a high-voltage arm of a voltage divider on its frequency characteristics is considered. A mathematical model of this influence is constructed and the limit values of frequency characteristics of the voltage divider are determined. Practical value. It is recommended to introduce into the normative documentation of broadband voltage dividers the corrected value of the division factor, which allows to significantly reduce the deviation of the actual value of the division factor of the voltage divider from the normalized value in a wide range of frequency changes.
Energy management based on a fuzzy controller of a photovoltaic/fuel cell/Li-ion battery/supercapacitor for unpredictable, fluctuating, high-dynamic three-phase AC load
Authors: Ayat Y. , Badoud A. E. , Mekhilef S. , Gassab S.
Published: April 2023

Introduction. Nowadays, environmental pollution becomes an urgent issue that undoubtedly influences the health of humans and other creatures living in the world. The growth of hydrogen energy increased 97.3 % and was forecast to remain the world’s largest source of green energy. It can be seen that hydrogen is one of the essential elements in the energy structure as well as has great potential to be widely used in the 21st century. Purpose. This paper aims to propose an energy management strategy based a fuzzy logic control, which includes a hybrid renewable energy sources system dedicated to the power supply of a three-phase AC variable load (unpredictable high dynamic). Photovoltaic (PV), fuel cell (FC), Li-ion battery, and supercapacitor (SC) are the four sources that make up the renewable hybrid power system; all these sources are coupled in the DC-link bus. Unlike usual the SC was connected to the DC-link bus directly in this research work in order to ensure the dominant advantage which is a speedy response during load fast change and loads transient. Novelty. The power sources (PV/FC/Battery/SC) are coordinated based on their dynamics in order to keep the DC voltage around its reference. Among the main goals achieved by the fuzzy control strategy in this work are to reduce hydrogen consumption and increase battery lifetime. Methods. This is done by controlling the FC current and by state of charge (SOC) of the battery and SC. To verify the fuzzy control strategy, the simulation was carried out with the same system and compared with the management flowchart strategy. The results obtained confirmed that the hydrogen consumption decreased to 26.5 g and the SOC for the battery was around 62.2-65 and this proves the desired goal.
Анализ динамики эпидемического процесса COVID-19 в мире за неделю с 22.04.2023 г. по 28.04.2023 г.
Authors: Зимирова Анастасия , Поспелов Михаил , Иванова Александра , Дмитриева Людмила , Чумачкова Елена , Карнаухов Игорь , Щербакова Светлана , Кутырев Владимир
Published: April 2023

В обзоре представлен анализ эпидемиологической ситуации в странах мира по COVID-19 за неделю с 22.04.2023 г. по 28.04.2023 г.
Petroleum++: Envisioning the Future of SPE
Authors: Kamal Medhat M.
Published: April 2023

The main values of SPE are providing our members with the latest advancements in all petroleum engineering technical disciplines and enabling professional development throughout their careers from university until retirement. This is achieved through the programs and services SPE offers to us, members, and evolves with the industry and technology. That necessitates that the SPE Board of Directors update the Society’s Strategic Plan as needed. Recently, updating the Strategic Plan has been done about every 5 years. The last exercise to that effect started in June 2022, and the final version was approved during the most recent Board meeting in January 2023. We engaged a consultant to help guide us through the process, and reached out to members in many ways to gather their feedback on challenges and future directions:

- One-on-one virtual interviews with members of the SPE Foundation Board of Trustees, members, and chairs of SPE committees, industry members/key sponsors, academia, and SPE section leaders

- Focus groups with members including past presidents, advisory councils, young professionals, and academicians

- SPE Connect General Discussion community where questions were posted for member feedback

- Online survey with mostly open-ended questions that was advertised to all members through JPT, monthly and publication newsletters, and on SPE.org

- Session at ATCE where attendees could ask questions and make comments

Here are the main results of this work. The entire Strategic Plan can be found here.

The core purpose of SPE is to provide shared expertise, resources, and lifelong learning opportunities to fuel the success of our members and the future of the industry. Our mission is to connect a global community of engineers, scientists, and related energy professionals to exchange knowledge, innovate, and advance their technical and professional competence regarding the exploration, development, and production of oil and gas and related energy resources to achieve a safe, secure, and sustainable energy future.

SPE is committed to these core values:

- Technical Excellence and Professionalism—committed to innovation, lifelong learning, and the highest standards of professional conduct and expertise

- Member Focus—consistently provide accessible, relevant resources to help members thrive in the ever-evolving energy industry

- Global Scale and Local Relevance—leverage insights and resources to better serve members’ needs both globally and locally

- Collaboration—dedicated to knowledge dissemination and exchange to solve complex problems through internal and external networking and volunteer opportunities

- Diversity and Inclusion—a community that embraces diversity and inclusion as essential to the success of our industry and society

- Environmental and Social Stewardship—leadership to achieve a safe, secure, and sustainable energy future

SPE’s vision is to advance the oil- and gas-producing and related energy communities’ ability to meet the world’s energy needs in a safe, secure, and sustainable manner.
Orphan No More—Federal Funds Begin Flowing to State Coffers for Orphan Well Remediation
Authors: Presley Jennifer
Published: April 2023

Billions of dollars in federal funding secured under the 2021 Bipartisan Infrastructure Investment and Jobs Law (BIL) has started flowing into US state coffers for the plugging and remediation of orphan oil and gas wells.

Signed into law in November 2021, the BIL is a $1.2 trillion “once-in-a-generation investment” that includes $4.7 billion in funding to plug and remediate orphan wells across the nation. According to the US Department of the Interior (DOI), these legacy pollution sites are environmental hazards and jeopardize public health and safety by contaminating groundwater, emitting noxious gases and methane, littering the landscape with rusted and dangerous equipment, and harming wildlife.

The US Environmental Protection Agency (EPA) estimated in a 2020 inventory of greenhouse gas emissions that, on average, each unplugged abandoned oil and gas well emits 0.13 tons of methane per year.

When multiplied by an estimated 2.1 million unplugged, abandoned oil and gas wells, the EPA estimated methane emissions of 276,472 tons in 2019, equivalent to roughly 9.5 mtpa of carbon dioxide (CO2) assuming a 100-year global warming potential (GWP) of 34.

This is roughly 2.6% of total US energy-related methane emissions or roughly 0.2% of total US energy-related greenhouse gas emissions in 2019, assuming a 100-year GWP for methane of 34, according to a report published in Environmental Science & Technology.

The Intergovernmental Panel on Climate Change defines GWP as the cumulative radiative forcing, both direct and indirect effects, over a specified time horizon resulting from the emission of a unit mass of gas related to some reference gas.

While the EPA pegs the number of orphaned wells in the millions, there are variations in the count, depending on how each state or organization defines what is and is not an orphaned well. A survey, for example, by the Interstate Oil and Gas Compact Commission in 2018 put the range of orphaned and idle wells at around 560,000 to 1.1 million.

According to the Railroad Commission of Texas (RRC), the regulatory body that oversees Texas oil and natural gas development, an orphan well is an inactive and unplugged well that has not produced oil or natural gas for a minimum of 12 months.

But the Colorado Oil & Gas Conservation Commission defines an orphan as a well which has no owner or operator that can be found, or where the owner or operator is unwilling or unable to plug and abandon such a well. This JPT article described the hunt for the potentially hundreds of thousands of unknown, undocumented orphans across the country.

In October 2021, the Environmental Defense Fund (EDF) released a map showing the location of more than 81,000 documented orphan wells in 28 states that are eligible for funding under the BIL. In the spring of 2022, thanks in part to states documenting more than 40,000 additional orphan wells, EDF released an updated map showing more than 120,000 documented orphan wells in 30 states (Fig. 1).
Geomechanical Modeling of Fracture-Induced Vertical Strain Measured by Distributed Fiber-Optic Strain Sensing
Authors: Srinivasan Aishwarya , Liu Yongzan , Wu Kan , Jin Ge , Moridis George
Published: April 2023

Distributed acoustic sensing (DAS) has recently gained importance in monitoring hydraulic fracturing treatments in the oil and gas industry. DAS data contain critical information about the fracture geometry as linearly relatable induced strain variations during the stimulation. The low-frequency components of the DAS (LF-DAS) data are known for their complexity as they exhibit various characteristic signals—caused by several mechanisms—that complicate their interpretation. LF-DAS data from horizontal monitoring wells (HMWs) have been used to detect fracture hits and characterize fracture geometry. However, the LF-DAS data from vertical monitoring wells (VMWs) have not been studied extensively as a means to infer fracture geometry. The major limitation of VMWs is the number of monitored stages, but the data contain more information about fracture height compared with LF-DAS measurements from HMWs. Hence, it is necessary to have a physical rock deformation model to simulate the strain rate responses in offset VMWs during fracture propagation to understand and interpret the various patterns that are observed in the field data sets.

The objective of this study is to simulate strain rate signals in VMWs during hydraulic fracturing and to analyze the measurements to obtain information on the fracture geometry, especially the fracture height. The fracture boundary can be directly related to the strain rate signals. In this study, we propose a workflow to determine fracture height at different fiber-to-fracture (dff) distances for fracture heights ranging from 20 m to 300 m. We conduct a detailed sensitivity analysis to understand the impacts of the dff, the perforation location, the fracture passing time, and the well inclinations on the measured strain rate signals. The analysis helps interpret the various patterns observed in field data and the underlying mechanisms. Interpretation of field data from the Hydraulic Fracture Testing Site 2 (HFTS-2) using the results from our forward physical model provides valuable information on the fracture characteristics that can be captured by the physical model. The results of this study are expected to provide better interpretations of LF-DAS signals from VMWs.
Various topological descriptors and corresponding Entropies of Iridium cored Dendrimer
Authors: Xavier D. Antony , Ismail Rashad , Almusawa Musawa Yahya , karamti Hanen , Nair Theertha , Varghese Eddith Sarah , Baby Annmaria , Ghani M. Usman
Published: April 2023

Measures of graph entropy have been widely used in information theory, biology, chemistry, and sociology, among other disciplines. The entropy of a probability distribution may be thought of as both an indicator of information and an indicator of uncertainty, and it is a number used in information theory to gauge the complexity of a graph. Mathematical and medicinal chemistry, including drug design, have previously made extensive use of information-theoretic network complexity measurements. Dendrimers belong to the world of molecular chemistry for stepwise controlled synthesis and to the world of polymers for repeating structures from monomers. A topological index is a numerical metric that describes the topology of a graph. Consequently , a topological index calculated for a molecular network is a quantitative indicator of molecular topology. Due to the simplicity of production and the speed at which these computations may be performed, these descriptors have gained great prominence in recent years. Characterizing molecular structure using topological methods, including numerical graph invariants, is a current trend in mathematics and computational chemistry. Such conceptual descriptors have also launched a broad range of applications in QSAR/QSPR investigations and is ideal for innovative molecular design, drug development, and risk assessment of chemicals. In this paper, various entropy measures along with the distance and degree based topological indices of highly efficient iridium cored electrophosphorescent dendrimer has been evaluated. Entropy measure is a topological feature that may be used to assess the complexity of chemical compounds.
Prevalence of Brugada syndrome in a general population in south of Iran: Shiraz cohort heart study (SHS)
Authors: Nikoo Mohammad Hossein , Keshavarz Mohammad , Rad Mehrdad Rabiee , Rezaei Mansour , Mousavi Seyed Mojtaba , Dabaghi Ghazal Ghasempour , Parsa Nader , Fatemian Hossein
Published: April 2023

Brugada syndrome (BS) is a hereditary cardiac channelopathy associated with premature sudden cardiac death and arrhythmic events. However, there are limited data on prevalence of BS in Iran. This study aimed to evaluate the prevalence of BS and Brugada pattern on the electrocardiogram (ECG) in a general population located in south of Iran. BS and Brugada pattern were defined as the presence of type I and type II-III Brugada spontaneously or after a sodium channel blocker test, respectively. A total of 4000 participants (52.3% women) were enrolled in this study. Only 12 patients (0.3%) had Brugada ECG pattern and 4 ECGs were consistent with BS (0.1%). All 16 cases were followed up for 60 months. No mortality or cardiovascular events were observed during this period. This study showed a very low prevalence of BS and Brugada pattern in ECG in the general population of Iran.
Positive implicative cubic intuitionistic ideals in BCK-algebras
Authors: Bordbar Hashem , Jun Young Bae
Published: April 2023

Conditions for a cubic intuitionistic set to be a cubic intuitionistic ideal are provided. Positive implicative cubic intuitionistic ideal in BCK-algebras is introduced, and related properties are investigated. Characterizations of positive implicative cubic intuitionistic ideal is established.
2010 Mathematics Subject Classi cation. 06F35, 03B60, 03B52.
Molecular Characterization and Dynamics of the Fusion Protein of an Emerging Genotype VIIi of Newcastle Disease Virus
Authors: Maqbool Rafia , Gul Irfan , Rasool Aarif , Wani Shakil , Kashoo Zahid , Gul Nadiya , Hassan Amreena , Ahmad Wasif , Wali Asifa , Qureshi Sabia
Published: April 2023

The viral strains of the Newcastle disease virus have exhibited genetic and pathogenic diversity since their discovery, which is mainly influenced by mutations in the Fusion gene. This study focused on describing the circulating Newcastle disease virus strain based on the Fusion gene sequencing of three isolates: JKND01, JKND02, and JKND03, which were isolated from commercial poultry in Kashmir. Phylogenetic analysis identified the isolates as Genotype VIIi with the virulent fusion cleavage site motif (113RQKRF117). Homology analysis of amino acid sequences identified amino acid substitutions in the Fusion protein of the isolates compared to the reference strains. In silico mutational analysis revealed that the amino acid changes impact the structure of the protein, potentially affecting the functional behaviour of the virus. Moreover, predictive analysis of potential post-translational modification motifs showed a loss of an N-glycosylation site and the acquisition of a phosphorylation site in JKND02 compared to the reference Fusion glycoprotein. This study reports the first presence of the fifth panzootic vNDV genotype VIIi in Kashmir, highlighting the need for further epidemiological and surveillance studies to better understand the distribution and spread of the virus and to develop effective control measures.
Coping with Energy Security challenges; The Experiences of SMEs in the Accra Metropolis of Ghana
Authors: Arthur Jones Lewis , Owusu Edward , Arthur Sonny Davis
Published: April 2023

The study uses a quantitative research approach to explore the strategies that SMEs have adopted to cope with issues relating to energy security. A sample of 205 owners of enterprises was sampled from an appropriation of 500 SMEs in the Accra Metropolis of the Greater Accra Region. The cluster method and simple random sampling approaches were used to select the respondents. Data collected through questionnaires were edited and cleaned to ensure completeness, consistency and legibility. Descriptive, exploratory and inferential analyses were applied to guide the study of the results. SMEs stand to benefit from energy security if they can able to apply strategies to embrace sustainable energy practices that explore opportunities in renewable energy sources. SMEs in the wholesale and retail business sectors are better able to cope with the challenges of ES due to several strategy options such as exploiting renewable energy power, reducing energy consumption, using generators, reducing energy consumption and temporarily suspending business. There are few energy sources available to SMEs, thus limiting the strategy options that could be applied to cope with challenges in ES. SMEs should invest in other sources of energy especially renewable energy such as solar energy to achieve energy security.
Non-invasive detection of Zika virus in French Guiana using trapped mosquito excreta
Authors: Guidez Amandine , Fontaine Albin , Yousfi Léna , Moutailler Sara , Carinci Romuald , Issaly Jean , Gaborit Pascal , Cannet Arnaud , de Laval Franck , Matheus Séverine , Rousset Dominique , Dusfour Isabelle , Girod Romain , Briolant Sebastien
Published: April 2023

Background Mosquito borne pathogens are a threat to human health and can be difficult to detect especially when they cause a high rate of asymptomatic infections in human. The discovery that infected mosquitoes can release viruses in both their saliva and secreta gave rise to low-cost methods for the early detection of arboviruses during entomological surveillance.Methods Here, we implemented both saliva and excreta-based entomological surveillance during the emergence of Zika virus (ZIKV) in French Guiana in 2016 by trapping mosquitoes around households of confirmed ZIKV symptomatic cases.Results ZIKV was detected in mosquito excreta and not in mosquito saliva in one trap collection out of 85 (1.2%) throughout the survey. One female Ae. aegypti was found with a ZIKV systemic infection in the corresponding trap. The lag time between symptom onset declared by the ZIKV infected individual living in this site and ZIKV detection detected in this mosquito was one week.Conclusions Altogether, these results highlight the potential of trapped mosquito excreta as a sensitive and cost-effective method to non-invasively detect arbovirus circulation.