bluuebunny/crossref_metadata_2025 huggingface dataset:
ARTIFICIAL NEURAL NETWORKS FOR PREDICTING CHANGES IN SURFACE CONCENTRATIONS OF THE MAJOR GREENHOUSE GASES
Authors: Шичкин А.В. , Буевич А.Г. , Ремезова М.С. , Сергеев А.П. , Баглаева Е.М. , Субботина И.Е. , Сергеева М.В. , Мамедалиева А.Ю.
Published: August 2024

Рассматриваются несколько типов искусственных нейронных сетей (ИНС) для прогнозирования динамики изменения концентрации основных парниковых газов. Исследование основано на данных по приземной концентрации трех основных парниковых газов (метана, углекислого газа и водяного пара), полученных в ходе мониторинга динамики изменения концентрации основных парниковых газов на арктическом о. Белый, Ямало-Ненецкий АО, Россия. Прогноз был получен с использованием следующих типов ИНС: нелинейная авторегрессионная нейронная сеть с внешним входом (NARX), нейронная сеть Элмана (Elman) и многослойный персептрон (MLP). Для исследования был выбран временной интервал длительностью 168 ч в летний период 2016 г., который характеризовался ярко выраженным суточным циклом изменений концентраций парниковых газов. Прогноз осуществлялся для 20-часового временного интервала. Модель ИНС типа NARX построила наиболее точный прогноз изменения концентраций для всех парниковых газов.

This work discusses several types of artificial neural networks (ANNs) for predicting the dynamics of changes in the concentration of the major greenhouse gases. The study is based on data on the surface concentration of the three main greenhouse gases (methane, carbon dioxide and water vapor), which were obtained during the monitoring of the dynamics of changes in the concentration of the main greenhouse gases on the Arctic island Belyy, Yamalo-Nenets Autonomous District, Russia. The forecast was obtained using the following types of ANNs: nonlinear autoregressive neural network with external input (NARX), Elman’s neural network (Elman) and Multilayer perceptron (MLP). For the study, a time interval of 168 hours was selected in the summer period of 2016, which was characterized by a pronounced daily cycle of changes in greenhouse gas concentrations. The forecast was carried out for a 20-hour time interval. The ANN model type NARX has built the most accurate prediction of concentration changes for all greenhouse gases.
METROLOGICAL BASE FOR ENSURING THE SAFETY OF WATER AND SOIL ECOLOGICAL SYSTEMS
Authors: Милешко Л.П.
Published: August 2024

Цель работы состоит в анализе возможных путей построения универсальной мультисенсорной системы, способной осуществлять комплексный экологический мониторинг. Отмечено, что состояние безопасности экологических систем, характеризующееся уровнем защищенности от экологических опасностей, оценивается по результатам измерений многочисленных параметров окружающей среды. С этой точки зрения, метрологические средства, позволяющие осуществлять параллельные измерения одновременно нескольких характеристик водных и почвенных сред, имеют явное преимущество перед устройствами для однопараметрических измерений. Предложен аппаратно-програмный комплекс нового поколения, содержащий массивы сенсоров газов и ионоселективных электродов для синхронного анализа качества воздуха, воды и почвенных сред. Это требует соответствующей корректировки методик машинного обучения и нейросетевого моделирования по сравнению с предыдущей моделью.

The purpose of this work is to analyze possible ways to build a universal multisensory system capable of comprehensive environmental monitoring. It is noted that the state of security of ecological systems, characterized by the level of protection from environmental hazards, is evaluated by the results of measurements of numerous environmental parameters. From this point of view, metrological tools that allow simultaneous measurements of several characteristics of water and soil environments have a clear advantage over devices for single-parameter measurements. A new generation hardware and software package containing arrays of gas sensors and ionselective electrodes for synchronous analysis of air, water and soil quality is proposed. This requires appropriate adjustments to machine learning and neural network modeling techniques compared to the previous model.
SMALL-SCALE PERIODIC STRUCTURES IN ATMOSPHERIC PLASMA WITH A STRONG ELECTRIC FIELD
Authors: ЛАПТУХОВ А.И. , ЛАПТУХОВ В.А.
Published: August 2024

В атмосферной теплой плазме с сильным электрическим полем показана возможность существования как стационарных периодических в пространстве мелкомасштабных структур, так и незатухающих медленных волн с характерным размерами, измеряемыми сантиметрами, дециметрами и метрами. На разных высотах D слоя ионосферы возможны до четырех типов таких незатухающих мелкомасштабных волн. Образование периодических в пространстве структур на высотах D слоя ионосферы сопровождается нарушением радиосвязи. Показана важность учета таких структур при объяснении феномена спрайта. Предложен возможный процесс развития объемного разряда в виде спрайта.

In atmospheric warm plasma with a strong electric field, the possibility of the existence of both stationary periodic in space small-scale structures and undamped slow waves with characteristic dimensions measured in centimeters, decimeters, and meters is shown. At different heights of the D layer of the ionosphere, up to four types of such persistent small-scale waves are possible. The formation of structures periodic in space at heights of the D layer of the ionosphere is accompanied by a breakdown in radio communication. The importance of taking such structures into account when explaining the sprite phenomenon is shown. A possible process for the development of a volumetric discharge in the form of a sprite is proposed.
THERMODINAMIC ESTIMATION OF ALLOTROPIC CARBON FORMS INFLUENCE ON TITANIUM CARBIDE SYNTHESIS IN ALUMINUM MELT
Authors: РЫБАКОВ А.Д. , ЛУЦ А.Р. , ЗАКАМОВ Д.В. , АМОСОВ А.П.
Published: August 2024

В работе приводятся результаты исследования параметров синтеза карбида титана по реакции Ti+C=TiC в расплаве алюминия с применением традиционных и недавно открытых наноструктурных аллотропных модификаций углерода (графит, карбин, алмаз, технический углерод, фуллерен С60, фуллерен С70, многослойные углеродные нанотрубки) и добавлении соли Na2TiF6. Расчеты проводились с применением комплекса программ «Thermo», основанного на методе минимизации термодинамического потенциала. Изучено изменение адиабатических температур, возможность синтеза целевой фазы TiC, вероятность образования побочных керамических, интерметаллидных фаз и газообразных рафинирующих продуктов. На основе полученных данных выведены рекомендации по использованию углеродных форм в качестве исходных компонентов для синтеза TiC в режиме горения (самораспространяющегося высоко-температурного синтеза) с целью получения композиционного материала алюминий-карбид титана.

The paper demonstrates the study results of parameters of titanium carbide synthesis by the reaction Ti+C=TiC in aluminum melt using traditional and recently discovered nanostructured allotropic carbon modifi cations (graphite, carbyne, diamond, carbon black, fullerene C60, fullerene C70, multiwalled carbon nanotubes) and adding the salt Na2TiF6. Calculations were held using «Thermo» software based on minimization of thermodynamic potential method. Adiabatic temperature variation was studied as well as TiC target phase synthesis possibility, probability of the formation of ceramic, intermetallic byproduct phases and gaseous refining products. Based on obtained data, the recommendations were developed on using carbon forms as initial components for the TiC synthesis in the combustion mode (self-propagating high-temperature synthesis) to manufacture aluminum-titanium carbide composite.
HISTORY OF GEOLOGICAL RESEARCHES OF SIBERIA THROUGH THE PRISM OF BIOGRAPHIES OF SCIENTIFIC LEADERS – A.A. TROFIMUK AND V. S . SOBOLEV
Authors: Куперштох Н.А.
Published: August 2024

В статье проанализированы важнейшие события в истории геологической науки Сибири во второй половине XX столетия через персональные истории академиков Андрея Алексеевича Трофимука и Владимира Степановича Соболева. Оставив ради нового дела работу в европейской части страны в конце 1950-х гг., эти ученые наиболее полно реализовали свой научно-организационный потенциал в новосибирском Институте геологии и геофизики СО АН СССР. Академики А.А. Трофимук и В.С. Соболев вошли в историю отечественной и мировой науки не только благодаря фундаментальным научным результатам. Они создали новые научные направления и основали научные школы. Сегодня именем А.А. Трофимука назван Институт нефтегазовой геологии и геофизики СО РАН, именем В.С. Соболева – Институт геологии и минералогии СО РАН.

The article analyzes the most important events in the history of the geological science of Siberia in the second half of the XX century through the personal stories of academicians Andrei Alekseevich Trofi muk and Vladimir Stepanovich Sobolev. Leaving for a new business their work in the European part of the country at the end of the 1950s, these scientists fully realized their scientific and organizational potential at the Novosibirsk Institute of Geology and Geophysics of the Siberian Branch of the USSR Academy of Sciences. Academicians A.A. Trofimuk and V.S. Sobolev went down in the history of domestic and world science not only due to fundamental scientific results. They created new scientific directions and founded scientific schools. Today the name of A.A. Trofimuk named the Institute of Petroleum Geology and Geophysics of the SB RAS, after V.S. Sobolev named the Institute of Geology and Mineralogy of the SB RAS.
THE HISTORY OF INVESTIGATIONS OF THE RECENT GEODYNAMICS AND SEISMICITY AT THE INSTITUTE OF TECTONICS AND GEOPHYSICS OF THE FAR EAST BRANCH OF THE RUSSIAN ACADEMY OF SCIENCES
Authors: Быков В.Г.
Published: August 2024

Представлены основные этапы становления и развития геодинамических, сейсмологических и сейсмотектонических исследований Института тектоники и геофизики им. Ю.А. Косыгина Дальневосточного отделения Российской академии наук. Дан краткий обзор исследований и достижений по геодинамике, геомеханике, сейсмологии и сейсмотектонике, выполненных в институте за 45 лет (1975–2020 гг.) по направлениям: связь сейсмотектонических режимов с глубинным строением и геофизическими полями, сейсмический и геофизический мониторинг сейсмогенных зон Приамурья, сейсмогеодинамика и сейсмотектоника Востока Азии, миграция сейсмической активности в зоне Амурской плиты, волновая динамика медленных деформационных процессов, современные движения тектонических структур Дальневосточного региона.

The paper describes the main stages of the early years and further development of the geodynamic, seismological and seismotectonic studies conducted by the researchers of the Yu.A. Kosygin Institute of Tectonics and Geophysics of the Far East Branch of the Russian Academy of Sciences. A brief overview is given of the studies performed and the advancements made in the field of geodynamics, geomechanics, seismology, and seismotectonics for a 45-year period (1975–2020). The research directions in the focus of the studies are the relationship of the seismotectonic regimes with the deep structure and the geophysical fields, the seismic and geophysical monitoring of the seismogenic zones in Priamurye, seismogeodynamics and seismotectonics of eastern Asia, migration of earthquakes in the Amurian Plate zone, the wave dynamics of slow deformation processes, and recent movements of tectonic structures in the Far East region.
LABORATORY OF PHYSICAL AND CHEMICAL RESEARCH METHODS AND KHABAROVSK INNOVATIVE-ANALYTICAL CENTER
Authors: Бердников Н.В.
Published: August 2024

Приводится история становления лаборатории физико-химических методов исследования ИТиГ ДВО РАН, цели и задачи ее создания, основные направления исследований и достижения, сведения об экспериментальной поддержке сторонних организаций, международной и образовательной деятельности. Освещена работа основанного на базе лаборатории Хабаровского инновационно-аналитического центра.

A brief review is provided of the historical development of the Laboratory of Physical and Chemical Research Methods highlighting the goals and objectives of its establishment at the Institute of Tectonics and Geophysics FEB RAS, main thrusts of the research and achievements, as well as financial support of outside organizations on a trial basis and international and educational activities. Scientifi c research at the Khabarovsk Innovative-Analytical Center established on the basis of the Laboratory is also considered.
The Violinist’s Creativity: Towards the Problem of Creating a Performing Interpretatio
Authors: Сафонова Е.Л.
Published: August 2024

Статья посвящена одной из ключевых проблем музыкального исполнительства, возникшей на определенном историческом этапе. Особенности создания исполнительской интерпретации скрипачами-профессионалами обусловлены эволюцией вида деятельности музыкантов различных эпох (скрипач-композитор – скрипач-композитор-интерпретатор – скрипач-интерпретатор), характеристиками нотных текстов, спецификой выразительных возможностей скрипки как инструмента. Сам процесс интерпретации изначально определился в двух фазах: первая – прочтение и осознание нотных знаков и символов (авторского смыслового кода произведения), вторая – воплощение художественной идеи в звучащую материю. Первоисточником явилась природа скрипки: её конструкция, формат, принцип действия. Индивидуальное применение свойств инструмента стало главным фактором, обусловившим бесконечное многообразие вариантов трактовки авторских смыслов. Историческое развитие репертуара постоянно воздействует на характер исполнительской интерпретации. Эстетика и музыкальный язык каждой эпохи ставят перед скрипачами новые текстологические, технологические и художественные задачи. При этом и сегодня наиболее сложными для исполнителей остаются шедевры композиторов эпох барокко и классицизма.

The article is devoted to one of the key problems of musical performance that arose at a certain historical stage. The peculiarities of creating a performing interpretation by professional violinists are due to the evolution of the type of activity of musicians of different eras (violinist-composer – violinist-composer-interpreter – violinist-interpreter), characteristics of musical texts, specificity of the expressive capabilities of the violin as an instrument. The process of interpretation itself was initially defi ned in two phases: the first is the reading and awareness of musical notes and symbols (the author's semantic code of the work), the second is the embodiment of an artistic idea into sounding matter. The primary source was the nature of the violin: its construction, format, principle of operation. The individual application of the properties of the instrument became the main factor that led to the infinite variety of options for interpreting the author’s meanings. The historical development of the repertoire constantly influences the character of the performing interpretation. The aesthetics and musical language of each era pose new textological, technological and artistic challenges for violinists. At the same time, the most difficult for performers today are the masterpieces of composers of the Baroque and Classicism eras.
Literary and Musical Living Rooms: Educational and Methodological Module
Authors: Михайлов И.Е.
Published: August 2024

В статье представлен методический опыт разработки сценариев литературно-музыкальных гостиных. Заложенная выдающимся советским музыкантом-педагогом Д.Б. Кабалевским интеграция различных областей искусства актуальна и сейчас. Литературно-музыкальная гостиная открывает широкие возможности творческого вдохновения, применение различных видов самостоятельной и коллективной деятельности, является отличным средством формирования единства эмоциональной и интеллектуальной сфер психики. Литературно-музыкальная гостиная как форма организации учебной и досуговой деятельности отличается особой духовной атмосферой, эстетикой оформления: особое пространство – камерный зал музея, читальный зал библиотеки; возможностью погружения в ту или иную историческую эпоху, путешествие во времени и географии в мире литературного слова и музыкальных звуков. Она предполагает общение-диалог, совместное обсуждение музыковедческой темы с непременным оформлением стихотворными и прозаическими художественными текстами. Целью исследования стало выявление критериев при разработке сценариев литературно-музыкальных гостиных. Разработанные на базе критериев тексты литературно-музыкальных вечеров опубликованы в методическом сборнике, а сами вечера частично реализованы в формате камерного пространства сцены.
Music and Art-Therapy: Observation Practice
Authors: Бакши Л.С.
Published: August 2024

В современной музыкотерапии различают несколько форм воздействия на человека: рецептивный (или пассивный), активный и интегративный, когда пациент взаимодействует с разными видами искусств. В статье речь идет об интегративной форме воздействия на человека. Материалом служит практика автора в театрах и учебных заведениях (колледж, вуз) в России и США.

In modern music therapy, several forms of influence on a person are distinguished: receptive (or passive), active and integrative, when the patient interacts with different types of arts. The article deals with the integrative form of influence on a person. The material is the author's practice in theaters and educational institutions (college, university) in Russia and USA.
Mozartiana of the Marble Palace: on the History of Family Listening and Performing Traditions (1830–1890s)
Authors: Моисеев Г.А.
Published: August 2024

Цель работы состоит в анализе восприятия музыки Моцарта во второй половине XIX века представителями семьи Романовых. Актуальность и научная новизна определяются тем, что впервые на основе архивных документов (ГАРФ, КР РИИИ, РГИА, ОР РНБ) рассмотрено бытование ряда его сочинений в разных жанрах в дворцовой музыкальной культуре. Сочинения Моцарта на протяжении нескольких десятилетий составляли основу регулярных приватных музыкальных собраний Мраморного дворца – резиденции вел. кн. Константина Николаевича и его потомков. В статье используются комплексные источниковедческие и музыковедческие подходы. В приложении впервые публикуется эссе Александра Киреева о Реквиеме Моцарта, основанное на книге А.Д. Улыбышева.

The purpose of the research is to analyze the reception of Mozart’s music in the second half of the XIX century by members of the Romanov family. The relevance and scientific novelty are determined by the fact that for the first time on the basis of archival documents (State Archive of the Russian Federation, Cabinet of Manuscripts of the Russian Institute of Art History, Russian State Historical Archives, Manuscript Division of National Library of Russia), the provenance of his compositions in different genres in the palace musical culture is considered. During several decades Mozart’s compositions formed the basis of regular private musical assemblies on the Marble Palace – the residence of the Konstantinovichi branch of the House of Romanov. The article uses complex source and musicological approaches. For the first time the appendix published Alexander Kireev’s essay on Mozart’s Requiem based on Alexander Ulybyshev’s work.
«They Didn’t Blow the Trumpet Early at Dawn»: the Origins of a Wedding Lyrical Song from the Repertoire of the P.G. Yarkov Choir near Moscow
Authors: Бондаренко М.В.
Published: August 2024

Статья посвящена свадебным лирическим песням, которые получили широкое распространение практически по всей территории России, в том числе и в саратовском Поволжье. В работе проводится музыкально-стилистический анализ свадебных лирических песен «Затрубили трубушки рано на заре», которые исполнялись при расплетания косы невесты во время девичника и утром свадебного дня. Лирические песни, маркирующие локус невесты, представляются ядром свадебного ритуала. В статье рассматривается особый песенный тип, где песни объединены одним поэтическим сюжетом, как оказывается, имеющим древнее происхождение. Песни о расплетании девичьей косы в фольклористике принято называть «Трубушка» по первой строке запева: «Затрубили трубушки рано на заре». Зачастую, эта тема тесно увязывается с другим сюжетом с начальной строкой-зачином «Недолго веночку на стенке висеть». Отправной точкой в исследовании данного типа песен послужила архивная аудиозапись, сделанная ещё в самом начале 40-х годов прошлого столетия, от подмосковного хора крестьян под руководством самобытного, уникального собирателя и знатока традиционных русских песен Петра Глебовича Яркова. Целью исследования является систематизация и сравнительный анализ имеющихся материалов этой песни в публикациях XIX–XX веков, а также личных записей автора, зафиксированных на территории Саратовской губернии.

The article is devoted to wedding lyrical songs that have become widespread almost throughout Russia, including in the Saratov Volga region. The work provides a musical and stylistic analysis of the wedding lyrical songs "Trumpets sounded early at dawn", which were performed when the bride’s braid was unwound during the hen party and in the morning of the wedding day. Lyrical songs marking the bride’s locus are presented as the core of the wedding ritual. The article considers a special song type, where the songs are united by one poetic plot, as it turns out, having an ancient origin. Songs about the unwinding of a girl’s braid in folklore are usually called "Trubushka" after the fi rst line of the refrain: "The trubushki sounded early at dawn". Often, this topic is closely linked to another plot with the initial line-the beginning "Not for long to hang a wreath on the wall". The starting point in the study of this type of songs was an archival audio recording made at the very beginning of the 40s of the last century, from a peasant choir near Moscow under the leadership of an original, unique collector and connoisseur of traditional Russian songs Pyotr Glebovich Yarkov. The purpose of the study is to systematize and compare the available materials of this song in publications of the XIX–XX centuries, as well as the author’s personal records recorded on the territory of the Saratov province.
Evolution of the Qur’anic Reciting by the Russian Muslim – Tatars and Bashkirs
Authors: Имамутдинова З.А.
Published: August 2024

В ходе эволюции традиции чтения Корана урало-поволжских мусульман, продолжающейся более тысячелетия, можно выделить как эпохи расцвета (во времена существования Булгарии, Казанского ханства, в досоветский период), так и разрушений и стагнации (в исторические этапы средневековых завоеваний края, российского имперского правления вплоть до либеральных реформ Екатерины Великой в конце XVIII века, советские десятилетия). В данной статье с новых методологических позиций характеризуются религиозная практика и важнейшие свойства напевного чтения Корана мусульман-тюрков Урало-Поволжья в советский период. Ставится вопрос об упадке традиции и в то же время ее бытовании в полулегальной и скрытой формах при атеистическом курсе государства. Напевное чтение Корана мусульман-татар и башкир осмысливается как целостное этнорегиональное явление, исторически ориентированное на обязательный арабский и этно-региональный стили интонирования. Указывается на почти полную утрату связей с арабскими мелодическими истоками. Подтверждается обусловленность мелодических свойств этнической традиции чтения Корана особенностями народной музыкальной культуры, определяемыми, прежде всего, пентатонической (пятиступенной) ладоинтонационной основой. В работе используются архивные данные, доступные современной исторической науке, материалы полевых исследований (интервьюирование, аудиозаписи), накапливаемые автором с конца 1980-х гг., нотные расшифровки, корректируемые посредством компьютерных мелограмм.

The evolution of the tradition of Qur’anic reciting by the Ural-Volga Turkic Muslims lasted for more than a millennium and included epochs both the flowering (during the existence of Bulgaria, the Kazan Khanate, in the pre-Soviet period), and destruction and stagnation (in the historical stages of the medieval conquests of the region; the Russian imperial ruling until the Catherine the Great liberal reforms at the end of the XVIII century and the Soviet decades). This article characterizes the religious practice and the most important properties of the Qur’anic reciting by the Ural-Volga Tatars and Bashkirs in the Soviet period from a new methodological standpoint. It’s raised the question about the decline of tradition and at the same time, its existence in semilegal and hidden forms under the atheistic course of the state. The melodious reading of the Qur’an by Muslim Tatars and Bashkirs is interpreted as a common ethno-regional phenomenon, historically oriented to the Arabic normative and ethno-regional intonation styles. The loss of connections with the Arabic melodic origins is indicated. The author confi rms that the melodic characteristics of the ethnic tradition of the Qur’an reciting are conditioned by the peculiarities of folk music, determined primarily by the pentatonic (five-step) modebasis. The work employs archival data available to modern science, materials of the field research (interview, audio recordings) accumulated since the late 1980s, musical notations verified by computer melograms.
ON ENTERPRISE EFFICIENCY MANAGEMENT USING MATHEMATICAL MODELING OF DEVELOPMENT PROCESSES
Authors: РЕУТОВ В.Г. , ТРУНОВА К.А.
Published: August 2024

Значение эффективности при выполнении научно-исследовательских и опытно-конструкторских работ (НИОКР) особенно велико в современных условиях в связи с изменением структуры трудозатрат, характеризующимся снижением доли рутинных операций и ростом вклада интеллектуальной деятельности разработчиков. При этом возрастает роль количественных методов анализа производительности при выполнении НИОКР, позволяющих управлять эффективностью разрабатывающих предприятий. В статье дан обзор методов математического моделирования процессов разработки, основанных на теории массового обслуживания и теории систем, и приводятся примеры соответствующих математических моделей и решаемых с их использованием задач.

The importance of efficiency in the performance of research and development work (R&D) is especially great in modern conditions due to change in the structure of labor costs, characterized by a decrease in the share of routine operations and an increase in the contribution of intellectual activity of developers. At the same time, the role of quantitative methods for analyzing productivity in the performance of R&D is increasing, which make it possible to manage the efficiency of developing enterprises. The article provides an overview of the methods of mathematical modeling of development processes based on queueing theory and systems theory, and gives examples of the corresponding mathematical models and problems solved using them.
Application Methods of the Resistive Type Superconducting Current Limiters for Power Systems
Authors: ФАТХУЛОВ И.А. , ВОЛКОВА Т.А.
Published: August 2024

В данной статье рассмотрены вопросы, касающиеся повышения эффективности нефтедобычи посредством оптимизации системы управления электроприводом насосной станции. Проведено моделирование двух-, трех- и пяти-уровнего инвертора преобразователя частоты системы управления электропривода в MatlabSimulink, а также приведены результаты моделирования, на основе которых сделан вывод о предпочтительности применения инвертора высшего уровня, поскольку он позволяет улучшить качество выходного напряжения, что приводит к обеспечению заданных электрических параметров электропривода и, как следствие, к снижению потребления энергии и повышению надежности всей насосной системы.

The issues related to improving the oil production efficiency by optimizing the control system of the electric drive of the pumping station are discussed in thisarticle. The simulation of the two-, three- and five-level inverter of the frequency converter of the electric drive control system in Matlab Simulink is carried out, and the simulation results are presented, on the basis of which it is concluded that the use of a higher-level inverter is preferable, since it improves the quality of the output voltage, which leads to the provision of the specifi ed electrical parameters of the electric drive and, as a result, to reduce energy consumption and increase the reliability of the entire pumping system.
Recurrent Optimal Method for Linear Filtering of Arbitrary Signals Against the Background of Correlated and Uncorrelated Interference
Authors: ИВАНОВ Ю.П.
Published: August 2024

На основе содержания теоремы ортогонального проецирования излагается метод оптимальных, линейных рекуррентных оценок дискретных сигналов, содержащих флюктуационную и регулярную составляющие, на фоне коррелированных или некоррелированных помех. Алгоритмы оценки, полученные на основе данного подхода, совпадают по точности с фильтрацией Калмана, применимы к широкому классу моделей, в общем случае, немарковских сигналов и помех, являются простыми при их реализации, в качестве априорной информации используются математическое ожидание, и корреляционная функции сигналов, математическое ожидание и дисперсия помехи измерения.

Based on the content of the orthogonal projection theorem, we present a method for optimal, linear recurrent estimates of discrete signals containing fluctuation and regular components against the background of correlated or uncorrelated interference. The estimation algorithms obtained on the basis of this approach coincide in accuracy with Kalman filtering, are applicable to a wide class of models, in general, non-Markov signals and interference, are simple in their implementation, and the mathematical expectation and the correlation function of signals, the mathematical expectation and the variance of the measurement interference are used as a priori information.
Review and Analysis of Big Data Clustering Algorithms
Authors: АЛЬ-РАММАХИ А.А. , ГРОМОВ Ю.Ю. , КОШЕЛЕВ Е.В. , МИНИН Ю.В.
Published: August 2024

Алгоритмы кластеризации являются мощным инструментом анализа большого объема данных, осуществляя разделение этих данных на кластеры, так, чтобы объекты группировались в один кластер, когда они схожи по определенным метрикам. Для решения этой задачи разработано большое количество методов и алгоритмов. Актуальной проблемой остается задача выбора конкретных алгоритмов для обработки больших данных. В работе приводится попытка классификации существующих методов и алгоритмов, а также анализ их применения для обработки больших данных, основанный на сравнении показателей их функционирования.

Clustering algorithms are a powerful tool for analyzing large amounts of data, dividing that data into clusters so that objects are grouped into one cluster when they are similar in certain metrics. A large number of methods and algorithms have been developed to solve this problem. The problem of choosing specific algorithms for processing big data remains an urgent problem. The paper presents an attempt to classify existing methods and algorithms, as well as an analysis of their application for processing big data, based on a comparison of their performance indicators.
Nutrient content and antioxidant activity of cabbage, pickled cabbage, and Kimchi in the Pyeongchang region
Authors:   The Table and Food Coordinate Society of Korea, Jung Min Seo , Lee Seung Lim
Published: August 2024

This study investigated the impact of person-environment fit (P-E fit) on job satisfaction (JS), work engagement (WE), and prosocial organizational behavior (POB) among Generation MZ chefs in Korean hotels. Through analysis of the hospitality industry, this study focused on proposing strategies to attract and retain talented individuals in specific roles. Using a complex sampling method (quota sampling, snowball sampling, and judgment sampling), this study collected a total of 251 survey responses from hotel chefs nationwide. Analysis was conducted on the relationships between variables using structural equation modeling. It was found that a positive and direct impact of P-E fit on POB is not significant. While P-E fit positively influences JS, it does not positively affect POB, therefore does not mediate between P-E fit and POB. However, P-E fit positively influences WE, which in turn positively impacts POB, demonstrating the significance of the WE mediating effect. JS positively influences WE, indicating that JS and WE sequentially mediate the relationship between P-E fit and POB. Based on these results, this study has expanded the theory of person-environment fit and provides practical suggestions for hotel human resource management.
Data-Driven Search Algorithm for Discovery of Synthesizable Zeolitic Imidazolate Frameworks
Authors: Lee Soochan , Jeong Hyein , Jung Sungyeop , Kim Yeongjin , Cho Eunchan , Nam Joohan , Yang D. ChangMo , Oh Hyunchul , Choe Wonyoung
Published: August 2024

Zeolitic imidazolate frameworks (ZIFs), metal-organic analogues of zeolites, hold great potential for carbon-neutral applications due to their exceptional stability and porosity. However, ZIF discovery has been hindered by the limited topologies resulting from a mismatch between numerous predicted and few synthesized zeolitic networks. To address this, we propose a data-driven search algorithm using structural descriptors of known materials as a screening tool. From over 4 million zeolite structures, we identified potential ZIF candidates based on O−T−O angle differences, vertex symbols, and T−O−T angles. Energy calculations facilitated the ranking of ZIFs by their synthesizability, leading to the successful synthesis of three ZIFs with two novel topologies: UZIF-31 (uft1) and UZIF-32, -33 (uft2). Notably, UZIF-33 exhibited remarkable CO2 selective adsorption. This study highlights the synergistic potential of combining structural predictions with chemical intuition to advance material discovery.
Oxytocin analogues for the oral treatment of abdominal pain
Authors: Kremsmayr Thomas , Schober Gudrun , Kaltenböck Matthias , Hoare Bradley , Brierley Stuart , Muttenthaler Markus
Published: August 2024

Abdominal pain presents an onerous day-to-day reality for millions of people affected by chronic gastrointestinal disorders such as irritable bowel syndrome (IBS) and inflammatory bowel diseases (IBD). The oxytocin receptor (OTR) has emerged as a potential novel analgesic drug target as OTR expression is upregulated on colon-innervating nociceptors, which are accessible via luminal delivery in chronic visceral hypersensitivity states. However, the low gastrointestinal stability of the endogenous OTR peptide ligand oxytocin (OT) is a crucial bottleneck for therapeutic development. Here, we report the rational development of the first series of fully gut-stable and potent OT analogues, laying the foundation for a new area of oral and gut-specific peptide therapeutics. Compound optimisation guided by systematic structure-gut-stability-activity relationship analysis yielded highly stable analogues (t1/2 >24 h, compared to t1/2 <10 min of OT in intestinal fluid) equipotent to native OT (~3 nM) and with enhanced selectivity for OTR. Colon-targeted local luminal administration of the lead compound significantly reduced colonic mechanical hypersensitivity in a concentration-dependent manner in an in vivo mouse model of chronic abdominal pain. Moreover, oral administration of the lead compound also significantly reduced colonic mechanical hypersensitivity in this abdominal pain model. The employed strategies and generated compounds could pave the way to a new class of gut-specific oral peptide probes and therapeutics to study and combat chronic gastrointestinal disorders, an area with substantial unmet medical needs.
Slowed Singlet Exciton Fission Enhances Triplet Exciton Transport in Select Perylenediimide Crystals
Authors: Volek Tanner , Verkamp Max , Ruiz Gabriella , Staat Alexander , Li Boxi Cam , Rose Michael , Eaves Joel , Roberts Sean
Published: August 2024

Singlet fission (SF) materials used in light-harvesting devices must not only efficiently produce spin-triplet excitons but also transport them over hundreds of nanometers. N,N’-bis(2-phenylethyl)-3,4,9,10-perylenedicarboximide (EP-PDI) is a promising SF chromophore due to its photostability, large extinction coefficient, and high triplet yield, but the energy transport mechanisms in EP-PDI solids are minimally understood. Herein, we use transient absorption microscopy to directly characterize exciton transport in EP-PDI crystals. We find evidence for singlet-mediated transport in which pairs of triplet excitons undergo triplet fusion (TF), producing spin-singlet excitons that rapidly diffuse. This interchange of singlet and triplet excitons shuttles triplets as far as 205 nm within the first 500 ps after photoexcitation. This enhanced transport comes at a cost, however, as it necessitates favoring triplet recombination and thus requires a fine-tuning of SF dynamics to balance triplet yields with triplet transport lengths. Through numerical modeling, we predict that tuning the ratio of SF and TF rate constants, k_SF/k_TF, to between 1.9 and 3.8 allows for an optimized triplet transport length (425 – 563 nm) with minimal loss (7 – 10%) in triplet yield. Interestingly, by adjusting the size of EP-PDI crystals we find we can subtly tune their crystal structure and thereby alter their SF and TF rates. By slowing SF within small EP-PDI crystals, we are able to boost their triplet transport length by ~20%. Although counter-intuitive, our work suggests that slowing SF by introducing moderate structural distortions can be preferential when optimizing triplet exciton transport, provided singlet exciton transport is not significantly hindered.
Ir(III) Complexes based on Quinoline Carboxamide Ligands for CO2 Hydrogenation and Formic Acid Dehydrogenation in Water
Authors: PATRA SOUMYADIP , Himeda Yuichiro
Published: August 2024

A series of new quinoline and isoquinoline carboxamide based Ir(III) complexes based on the concept of strong electron donating ability of the anionic N-atom have been developed for hydrogenation of CO2 and dehydrogenation of formic acid (FADH) in water. The effect in catalytic activities with the series of complexes differing in the position of the quinoline ring as well as electron donating methoxy (-OMe) and hydroxy (-OH) functional groups has been investigated in detail. The complex 9 bearing the ligand 4-hydroxy-N-(4-hydroxyphenyl) quinoline-2-carboxamide was found to be the most efficient in CO2 hydrogenation with a TOF of 2040 h-1 at 50 °C and 1 MPa H2/CO2 (1:1) pressurized conditions. The active catalyst 9 exhibited an initial TOF of 75 h-1for CO2 hydrogenation even under ambient temperature and pressure in basic aqueous solution. In FADH, the complex 2 bearing the ligand N-phenyl isoquinoline-1-carboxamide had the highest catalytic activity with the initial TOF > 26000 h-1 for 1 M formic acid (FA) solution (pH 1.7) at 60 °C and achieving initial TOF up to 115000 h1 for 8 M FA solution at 80 °C.
Tunability in Heterobimetallic Complexes Featuring an Acyclic “Tiara” Polyether Motif
Authors: Karnes Joseph , Oliver Allen , Day Cynthia , Day Victor , Blakemore James
Published: August 2024

Both cyclic “crown” and acyclic “tiara” polyethers have been recognized as useful for binding of metal cations and enabling assembly of multimetallic complexes. However, the properties of heterobimetallic complexes built upon acyclic polyethers have received less attention than they deserve. Here, the synthesis and characterization of a family of eight redox-active heterobimetallic complexes that pair a nickel center with secondary redox-inactive cations (K+, Na+, Li+, Sr2+, Ca2+, Zn2+, La3+ and Lu3+) bound in acyclic polyether “tiara” moieties are reported. Structural studies with X-ray diffraction (XRD) analysis were carried out on the monometallic nickel precursor complex to the heterobimetallics and the adducts with K+, Li+, Sr2+, Zn2+, and Lu3+; the results confirm binding of the secondary cations in the tiara site, and demonstrate that the tiara moiety is more conformationally flexible than the analogous 18-crown-6-like moiety of a homologous macrocyclic ligand. Spectroscopic and electrochemical studies show, however, that the stability and cation-driven tunability of the tiara-based heterobimetallic species are quite similar to those previously measured for crown-based species. Consequently, the tiara motif appears to be at least as equally useful for constructing tunable multimetallic species as the more commonly encountered crown motif. As use of acyclic tiaras avoids the need for tedious and/or time-intensive syntheses of macrocyclic structures, these findings suggest tiara motifs could be broadly advantageous in design of ligands to support multimetallic chemistry.
Automation in Electrifying Flow Organic Synthesis
Authors: Hardwick Tomas , Ahmed Nisar
Published: August 2024

Organic electrochemical synthesis may be combined with continuous flow and automation technology. Here, the authors highlight the benefits if such chemical engineering approaches along with technology and software directions taking organic chemistry into the future.
Utilização de enxerto cutâneo em membro pélvico após exérese de mastocitoma em cão: relato de caso
Authors: Oliveira Maria Clara Cunha Paranhos de , Cavalcanti Grazielle Anahy de Sousa Aleixo , Camargo Karine Silva , Andrade Lilian Sabrina Silvestre , Siqueira Filho Robério Silveira de , Lima Letícia Cibele
Published: August 2024

RESUMOOs enxertos cutâneos se caracterizam pela transferência de um segmento de pele para um local receptor, a fim de garantir a cobertura do defeito local, sendo uma alternativa em casos em que não se faz possível o recobrimento tecidual de amplas lesões tegumentares, havendo impossibilidade de cobertura por aproximação direta ou por retalhos. Muitas vezes tais defeitos são oriundos de cirurgias oncológicas após exérese neoplásica, principalmente em regiões de membros, em que a presença de pele se torna escassa. Objetivou-se descrever a realização de uma enxertia cutânea após exérese de um mastocitoma em membro posterior (região de tarso), em uma cadela, sem raça definida (SRD), com 13 anos de idade. A paciente foi encaminhada para atendimento clínico, apresentando nodulação em membro, com crescimento rápido, mensurando aproximadamente 2,5cm. Foram realizados exames complementares como hemograma, bioquímico, ultrassonografia abdominal, eletrocardiograma, ecocardiograma, radiografia de tórax e citologia. Após diagnóstico sugestivo de mastocitoma, optou-se pela realização da retirada cirúrgica e utilização da cirurgia reconstrutiva, visando uma síntese sem tensão, a fim de obter resultado satisfatório. Foi confeccionado o enxerto cutâneo em malha, cujo local doador foi a região lateral do tórax. Foram necessários 35 dias de acompanhamento pós-operatório com trocas de curativos a cada 3 dias, até observar a finalização da cicatrização. Conclui-se que o procedimento cirúrgico empregado foi eficaz para o tratamento de defeitos causados após exérese de mastocitoma em extremidade, tornando-se uma técnica eficiente para tal função.
Amputação de asa esquerda em calopsita (Nymphicus hollandicus) vítima de predação por gato doméstico
Authors: Andrade Julia Penna de , Santos Taynara Paula dos , Lima Marcos Túlio Barcelos , Soares Camilla Faria , Carvalho Marcelo Pires Nogueira de , Corteze Adriano de Abreu
Published: August 2024

Calopsitas, classificadas como animais domésticos da ordem Psittaciformes, família Cacatuidae e espécie Nymphicus hollandicus, têm sido cada vez mais presentes na rotina hospitalar veterinária, devido ao crescimento do mercado de pets não convencionais e criações amadoras de aves exóticas. Foi recebido, pelo Hospital Veterinário da Universidade Federal de Minas Gerais, um indivíduo da espécie N. hollandicus, sexo indeterminado, peso de 83 gramas e aproximadamente 4 anos de idade, apresentando fratura exposta no membro torácico esquerdo, resultado de predação por gato doméstico. Após avaliação clínica, constatou-se a necessidade de intervenção cirúrgica, devido à gravidade da fratura e possibilidade de infecção. O animal foi internado para estabilização, antibioticoterapia, analgesia e fluidoterapia. A amputação do membro afetado foi realizada na altura da articulação umero-rádio-ulnar após preparação cirúrgica adequada. O tutor foi orientado sobre os cuidados pós-operatórios, os quais foram seguidos conforme as recomendações médicas. Este caso destaca a frequência de acidentes entre aves e gatos domésticos, ressaltando a importância da responsabilidade dos tutores no convívio entre essas espécies e na prevenção de tais eventos.
Reference values for Vertebral Heart Size and Manubrium Heart Score for Healthy Border Collies
Authors: Prado Marcela Roberta , Pires Sâmara Turbay , Ercolin Anna Carolina Mazeto , Disselli Tamiris , Stanquini Camila Silveira , Andrade Amanda Moura Rocha de , Alencar Jennifer Leme , Hage Maria Cristina Ferrarini Nunes Soares
Published: August 2024

This study aimed to establish reference values for vertebral heart size (VHS) and manubrium heart score (MHS) in healthy adult Border Collies. The study utilized 12 dogs, both male and female, aged between 1 and 9 years. All dogs exhibited normal results on B- and M-mode echocardiography. Thoracic radiographs were taken in left lateral (LL), right lateral (RL), and ventrodorsal (VD) recumbency. Both subjective and objective analyses were conducted by two evaluators. The reproducibility of the objective radiographic measurements was excellent (P < 0.001), with the following mean values and standard deviations: VHS LL = 9.95 ± 0.47; VHS RL = 10.10 ± 0.51; VHS VD = 10.84 ± 0.61; Short-MHS RL = 2.10 ± 0.17; Long-MHS RL = 2.57 ± 0.19; Overall MHS RL = 4.65 ± 0.33; Short-MHS VD = 2.13 ± 0.22; Long-MHS VD = 2.94 ± 0.26, and Overall MHS VD = 5.03 ± 0.42. This study contributes to the standardization of VHS and MHS measurements, thereby aiding in the evaluation of the cardiac silhouette of Border Collies.
Características físicas de rações comerciais nas pisciculturas de Sena Madureira-AC, Amazônia Ocidental
Authors: Araújo Aldeisa Vieira de , Costa Dayana Alves da , Souza Clebson Lucas de , Oliveira Antonia Valcemira Domingos de , Moreira Guilherme Rocha , Beber Paulo Márcio
Published: August 2024

Objetivou-se avaliar as características físicas de quatro rações comerciais (B, M, N e S) obtidas de dezesseis propriedades piscícolas, categoria engorda com 28% de proteína bruta. Foram avaliados resistência física (RF), lixiviação da matéria seca (LMS), tempo máximo de flutuação (TMF), tempo máximo de impermeabilização (TMI), tempo de turgidez máxima (TTM), tempo máximo de agregação (TMA), granulometria (GRA) e uniformidade (UNI). Observou-se que, para RF, TMI, TTM e LMS as rações não diferiram (P>0,05) e os valores variaram de 96,9 a 98,6%; 4,50 a 240,0 segundos (s); 180,0 a 930,0s e 7,4 a 10,1%, respectivamente. Para TMF, TMA, GRA e UNI verificou-se diferença entre as rações (P<0,05) com valores que variaram de 1,50 a 311,0minutos (min);  411,0 a 3510,0s; 7,0 a 11,0 milímetros (mm) e 7,6 a 9,2mm, respectivamente. A ração M apresentou maior tempo (P<0,05) de manter-se flutuando na superfície da água, as rações B e S apresentaram maior tempo (P<0,05) até  que ocorresse a desintegração dos péletes, enquanto as rações B e M apresentaram valores médios para as variáveis GRA e UNI inferiores às especificações indicadas no rótulo pelo fabricante. Conclui-se que testar a qualidade física da ração pode auxiliar o piscicultor na escolha da melhor marca comercial  disponível no mercado e melhor custo-benefício, com maior estabilidade na água, maior integridade física e com formato e tamanho adequado ao tamanho do peixe.
Designing and analysis of electrocardiogram simulator tool kit
Authors: Pravesh Kumar Kulmitra , Atharva Bedekar , Alka Mishra , Naushin Anjum
Published: August 2024

In the realm of medical education, research, and device testing, Electrocardiogram (ECG) simulators are indispensable tools. They provide authentic representations of cardiac electrical activity, aiding healthcare professionals in practical training and facilitating the assessment of ECG device efficacy. This paper presents an efficient ECG simulator capable of replicating synthetic ECG waves, which are combinations of individual waves namely, the P wave, QRS complex, and T wave. The simulator can generate both normal and abnormal ECG waves and offers the flexibility to produce ECG waves at different frequencies.