bluuebunny/crossref_metadata_2025 huggingface dataset:
Исследование детектора цифровых амплитудно-модулированных сигналов
Authors: Брюханов Юрий Александрович
Published: December 2022

Рассмотрена работа амплитудного детектора цифровых сигналов, содержащего последовательно соединенные нелинейный элемент и цифровой фильтр. В качестве нелинейного элемента используется двухполупериодный цифровой вентиль. Установлены зависимости коэффициента детектирования и коэффициента гармоник от параметров цифрового фильтра. Результаты сравниваются со случаем использования однополупериодного цифрового вентиля.
Волноводная брэгговская структура миллиметрового диапазона длин волн
Authors: Олейник В. В. , Макаров Денис Григорьевич , Данилов Вадим Васильевич
Published: December 2022

Теоретически и экспериментально исследована периодическая диэлектрическая структура в прямоугольном волноводе 8-мм диапазона, которая является аналогом одномерного фотонного кристалла в оптическом диапазоне длин волн. Экспериментально зафиксирована форма, величина и положение запрещенной зоны, которые соответствуют расчетным данным. Расчет проведен на основе теории связанных волн, модифицированной для учета особенностей волноводного распространения излучения в резонансной структуре СВЧ диапазона.
Нейросетевые и статистические алгоритмы оценки координат источника радиоизлучения в многопозиционных радиосистемах при наличии аномальных ошибок измерения первичных параметров
Authors: Сирота Александр Анатольевич , Кирсанов Эдуард Александрович
Published: December 2022

Рассмотрены алгоритмы оценки координат источника радиоизлучения по однократным измерениям в угломерной и разностно-дальномерной многопозиционных радиосистемах при наличии аномальных ошибок измерения первичных параметров на основе нейронной сети с прямыми связями. Проведен анализ точностных характеристик нейросетевой оценки координат в сравнении со статистической байесовской оценкой, полученной с использованием минимаксного подхода Хьюбера.
Анализ эффективности обеспечения информационной скрытности в коммуникационных системах и сетях методами хаотической динамики
Authors: Костенко Павел Юрьевич , Антонов Артем Витальевич , Костенко Т. П.
Published: December 2022

Проанализирована информационная скрытность в коммуникационных системах и сетях, которая обеспечивается методами хаотической динамики. В отличие от традиционных методов решения задачи защиты информации, основанных на «вычислительной сложности» криптоанализа, скрытность предложенного в работе метода обусловлена неоднозначностью обращения хаотического отображения. Рассмотрены и определены характеристики стойкости метода к некоторым видам криптоатак.
Фазовая селекция электронов в системах типа орбитрон
Authors: Кириченко Юрий Васильевич
Published: December 2022

Предложен способ увеличения коэффициента полезного действия систем орбитронного типа, основанный на фазовой селекции электронов. Получено соотношение для параметров нерелятивистского электрона, волны и резонатора, при котором осуществляется оптимальный режим селекции. Исследована нелинейная стадия генерации электромагнитных волн электронами, вращающимися в скрещенных радиальном электростатическом и аксиальном магнитном полях в резонаторе орбитронного типа.
Анализ волноводно-щелевой линии передачи с прямоугольной металло-диэлектрической вставкой в щели
Authors: Крыжановский Владимир Григорьевич , Рассохина Юлия Валентиновна
Published: December 2022

В строгой постановке решена задача о собственных волнах волноводно-щелевой линии передачи (ВЩЛ) с прямоугольным металло-диэлектриктрическим включением в щели, моделирующим поведение закрытого диода в этой линии. Построен алгоритм для расчета обобщенной матрицы рассеяния волн обычной ВЩЛ на отрезке ВЩЛ с «диодом». На основе рассчитанных данных о потерях на отражение построена и оптимизирована согласующая цепь из отрезков ВЩЛ для СВЧ аттенюатора на двух pin-диодах.
Использование статистик высших порядков при распознавании негауссовых процессов по моделям линейного предсказания
Authors: Тихонов Вячеслав Анатольевич , Нетребенко Константин Владимирович
Published: December 2022

Предложены методы использования статистик высших порядков для получения признаков в задаче распознавания негауссовых процессов. Показано, что применение набора обобщенных решетчатых фильтров, параметры которых рассчитаны по моментным функциям 3-го и 4-го порядков повышают вероятность правильного распознавания.
Динамические и статистические характеристики линейно-преобразованной хаотической последовательности
Authors: Костенко Павел Юрьевич , Васюта Константин Станиславович , Сторожев Вадим Иванович , Олейник С. А.
Published: December 2022

Приведены результаты исследований динамических и статистических характеристик линейно-преобразованных хаотических последовательностей, сформированных отображениями Чебышева второго и третьего порядков. Показана зависимость исследуемых характеристик от вида отображения и числа элементов последовательностей при их линейном преобразовании. Установлено различие в эволюции распределений преобразованных последовательностей.
Переходный процесс в канале связи с амплитудными предыскажениями сигнала
Authors: Маригодов Владимир Константинович , Матвеев Юрий Валентинович
Published: December 2022

Рассмотрена возможность идеализации канала связи, имеющего АЧХ типа апертурного фильтра, путем включения линейного предыскажающего фильтра с взаимообратной АЧХ. Проведен сравнительный анализ переходного процесса в канале с оптимальными амплитудными предыскажениями и в случае их отсутствия.
Особенности измерения характеристик антенн во временной области с помощью сверхкоротких импульсов
Authors: Бобрешов Анатолий Михайлович , Нескородов Станислав Евгеньевич , Усков Григорий Константинович
Published: December 2022

В работе предложена методика измерения диаграммы направленности (ДН) с помощью сверхкоротких импульсов на открытом полигоне методом вышки. Экспериментально показано, что граница дальней зоны не зависит от длительности импульсов, если ширина спектра возбуждающего импульса превышает полосу пропускания антенны. При измерении в зоне интерференции возможно разделение прямого и отраженного от подстилающей поверхности импульса во времени при любой форме ДН используемых антенн. Метод временного окна позволяет исключить отражения от земли и имитировать свободное пространство. Продемонстрировано затухание энергии, характерное для свободного пространства, при излучении на поднятых антеннах и применении временного окна. При этом отсутствует интерференционная картина, характерная для узкополосных сигналов. Показано, что при невозможности исключить отраженный от земли импульс, затухание приобретает характер распространения вдоль подстилающей поверхности. Для демонстрации использования предложенной методики приведены измерения ДН рупорной антенны импульсным методом, проведено сравнение полученных результатов с измерениями в безэховой камере узкополосными сигналами.
Анализ пропускной способности канала для различных адаптивных схем передачи и характеристики BER при замирании Болье-Се
Authors: Деви Лаишрам Мона , Сингх Ахейбам Д.
Published: December 2022

Оптимизация спектральной эффективности и качества услуги позволяет достигнуть конструктивной пропускной способности канала для системы беспроводной связи. Анализ пропускной способности канала в случае канала с замираниями является важным для достижения указанной цели. Недавно разработанная модель, получившая название модели канала с замираниями Болье-Се (Beaulieu–Xie), приобретает свойства гибкости на основе параметров замирания Накагами-m и нецентрированного распределения хи для модели райсовских замираний, которая характеризует каналы прямой и непрямой видимости. В данной работе представлен анализ пропускной способности канала при использовании методов адаптивной передачи по каналам с замираниями Болье-Се. Различные схемы адаптивной передачи, такие как инверсия канала с фиксированной скоростью передачи CIFR, усеченная инверсия канала с фиксированной скоростью передачи TIFR, и адаптация оптимальной скорости передачи ORA, рассчитаны для модели каналов с замираниями Болье-Се. Кроме того, с использованием математических методов получена рабочая характеристика системы беспроводной связи в терминах коэффициента битовых ошибок BER при когерентной и некогерентной модуляции для указанного канала с замираниями. Полученные математические выражения проверены с помощью моделирования по алгоритму метода Монте–Карло или с использованием результатов, доступных в литературе.
Вейвлет-фильтрация сигналов без использования модельных функций
Authors: Тараненко Юрий Карлович , Ризун Нина Олеговна
Published: December 2022

Эффективная вейвлет-фильтрация реальных сигналов невозможна без определения их формы. Форма реального сигнала связана с его вейвлет-спектром. Для анализа формы часто используется непрерывная цветовая вейвлет-спектрограмма уровня сигнала. Недостатком непрерывной вейвлет-спектрограммы является сложность анализа размытого цветного изображения. Реальный сигнал с аддитивным шумом сильно искажает спектрограмму, основанную на непрерывном вейвлет-анализе, по сравнению с чистым сигналом. Поэтому идентификация реального сигнала по цветной непрерывной вейвлет-спектрограмме затруднена. Впервые, для решения этой задачи проведен сравнительный анализ спектрограмм сигналов, полученных на основе непрерывного вейвлет-преобразования в виде изображений с областями разного цвета переменной интенсивности, и корреляционных матриц, полученных на основе математических функций коэффициентов дискретных вейвлет-спектров. Сравнительный анализ полученных результатов с известными показал достаточную эффективность предложенного алгоритма как по снижению шума на итерацию, так и по конечному значению среднеквадратичной ошибки.
100 лет со для рождения В. А. Варюхина
Authors: Слюсар Вадим Иванович , Никитин Н. М.
Published: December 2022

14 декабря 2021 года исполнилось 100 лет со дня рождения советского и украинского ученого, Заслуженного деятеля науки УССР, основоположника теории многоканального анализа, создателя научной школы цифровых антенных решеток, профессора, доктора технических наук, генерал-майора Владимира Алексеевича ВАРЮХИНА.
Теоретическое исследование дифференциального автогенератора
Authors: Рапин Владимир Васильевич
Published: December 2022

В статье представлено исследование классической схемы дифференциального автогенератора строгими методами нелинейной теории электрических колебаний. Предложена математическая модель такого автогенератора, основанная на использовании законов Кирхгофа. Ее анализ реализован посредством перехода к модели одноконтурного LC-автогенератора, эквивалентного дифференциальному. Разработана методика такого перехода с формированием нелинейной характеристики усилительного элемента эквивалента на основе нелинейных характеристик усилительных элементов дифференциального автогенератора. Математическая модель эквивалентного автогенератора проста и точна. В случае малых значений малого параметра для ее анализа может быть использован традиционный способ, например, метод медленно меняющихся амплитуд. Для недостаточно малых величин малого параметра получены выражения, описывающие изменения амплитуды и частоты колебаний в процессе установления. Приведенные результаты будут полезными при разработке различных устройств на базе дифференциального автогенератора.
Study of security trends of the global society based on intelligent data analysis
Authors: Zgurovsky Michael , Pyshnograiev Ivan
Published: December 2022

This article is devoted to applying system analysis and data mining methodology to one of the most pressing problems today: studying the security of a global society in a conflicting world. A set of global threats relevant to the first half of the 21st century is considered. These threats have been identified by the United Nations (UN), the World Health Organization (WHO), the World Economic Forum, and other reputable international organizations. As a result of applying the Delphi method to analyze a wide range of threats identified by these organizations, 11 of the most important threats to humanity in the first half of the 21st century were identified. The vulnerabilities of different countries to the impact of the totality of these threats are analyzed. Scenarios for the possible development of a global society during and after the conflict are constructed.
Superconducting gravimeters based on advanced nanomaterials and quantum neural network
Authors: Yatsenko Vitaly , Kruchinin Sergii , Bidyuk Petro
Published: December 2022

The paper is focused on a new concept of a cryogenic-optical sensor intended for use in the space industry, geodynamics, and fundamental experiments. The basis of the sensor is a magnetic suspension with a levitating test body, a high-precision optical recorder of mechanical coordinates of the levitating body, and a signal-processing system. A Michelson-type interferometer with a laser diode and a single-mode optical fiber was used to measure the test body's displacements. The coordination of the laser diode coherence length and the difference in the interferometer optical lengths of the arms made it possible to eliminate coherent noise caused by interference from spurious reflections. The minimum recorded shift of the test body was 0.1 nm. The design of the sensor and the mathematical model of the superconducting suspension dynamics are presented. The results of experimental studies of a magnetic suspension together with an optical interferometric displacement sensor having a subnanometer sensitivity are shown.
FORMAÇÃO CONTINUADA EM GEOGRAFIA PARA ALÉM DO DESENVOLVIMENTO INDIVIDUAL DO DOCENTE
Authors: Ribeiro Maria Eduarda Souza
Published: December 2022

A referente pesquisa parte do pressuposto do quão é importante a atuação do docente em sociedade. Não só no ramo educacional, mas em todos os aspectos, para a discussão e análise perante o espaço, como é o caso do Professor de Geografia. Atualmente, o processo de ensino-aprendizagem necessita de uma visão dinamizada, na qual a formação inicial do professor por si só não é o suficiente para moldar o quadro de estagnação da educação. Nessa conformidade, a pesquisa busca analisar teoricamente, a didática e a aprendizagem a partir de alguns autores importantes, para então vivenciar a prática em uma escola pública no município de Nazaré da Mata – PE, com apreciação de aulas de Geografia e diálogo com professores da área.
Research on Image Denoising in edge detection Based on Wavelet Transform
Authors: Ning You , LiBo Han , Daming Zhu , Weiwei Song
Published: December 2022

In the process of image feature extraction, noise in the image will greatly affect the accuracy of edge detection. In this paper, the image is filtered to remove noise before edge detection by using the algorithm of wavelet transformation. Different wavelet functions are used to decompose image. Based on the experimental results, the best denoising wavelet function is selected. Canny algorithm is used to detect the edge of the denoised image, and the result of edge detection is evaluated according to the Pratt quality factor. It is proved that wavelet transform can improve the edge detection results.
Association between Periodontal Disease and cognitive impairment in Adults
Authors: Said-Sadier Najwane , Sayegh Batoul , Farah Raymond , Abbas Linda Abou , Dweik Rania , Tang Norina , Ojcius David M.
Published: December 2022

Introduction:
Periodontitis is a severe oral infection that can contribute to systemic inflammation. A large body of evidence suggests a role for systemic inflammation in the initiation of neurodegenerative disease. This systematic review synthesized data from observational studies to investigate the association between periodontitis and neuroinflammation in adults.
Methods and materials:
A systematic literature search of PubMed, Web of Science, and Cumulative Index to Nursing and Allied Health Literature (CINAHL) was performed for studies published from the date of inception up to September 2021. Search terms for the exposure “oral disease” and outcome “dementia”, “neuroinflammation” and “cognitive decline” were used. Study selection and data extraction were independently undertaken by two reviewers. The final eligible articles were included only if the exposure is periodontitis and the outcome is cognitive impairment or dementia or a topic related to this condition, and if the study was conducted in an adult population. The quality and risk of bias were assessed by Newcastle Ottawa Scale (NOS). Qualitative synthesis was used to narratively synthesize the results. Six cohort studies, three cross-sectional studies, and two case-control studies met the inclusion criteria. These eleven studies were only narratively synthesized. Meta-analysis was not performed due to the methodological heterogeneity of the studies.
Results:
All the included studies show evidence of an association between periodontitis and cognitive im-pairment or dementia and Alzheimer’s disease pathology.
Conclusion:
Nonetheless, the mechanisms responsible for the association between periodontitis and dementia are still unclear.
Chemophenetic Approach to Selected Senecioneae Species, Combining Morphometric and UHPLC-HRMS Analyses
Authors: Voynikov Yulian , Balabanova Vessela , Gevrenova Reneta , Zheleva-Dimitrova Dimitrina
Published: December 2022

Herein, a chemophenetic significance, based on phenolic metabolite profiling of three Senecio (S. hercynicus, S. ovatus and S. rupestris) and two Jacobaea species (J. pancicii and J. maritima) coupled to morphometric data, is presented. A set of twelve morphometric characters were recorded from each plant species and used as predictor variables in a Linear Discriminant Analysis (LDA) model. From a total 75 observations (15 from each of the five species), the model correctly assumed their species' membership, except 2 observations. Among the studied species, S. hercynicus and S. ovatus presented the greatest morphological similarity. A phytochemical profiling of phenolic specialized metabolites by UHPLC-Orbitrap-HRMS revealed 46 hydroxybenzoic, hydroxycinnamic, acylquinic acids and their derivatives, 1 coumarin, and 21 flavonoids. Hierarchical and PCA clustering applied to the phytochemical data corroborated the similarity of S. hercynicus and S. ovatus, observed in the morphometric analysis. This study contributes to the phylogenetic relationships between the tribe Senecioneae taxa and highlights the chemophenetic similarity/dissmilarity of the studied species belonging to Senecio and Jacobaea genera.
The Role of Trust in Government in China’s Rural Pension Program
Authors: Lin Benxi , Li Wenting , Zhang Yu Yvette , Wu Junbiao
Published: December 2022

This paper estimates the effect of trust in government on rural residents’ contributions in China’s rural pension program using the Propensity Score Matching (PSM) method. We construct an analytical framework for rural residents' decision-making in pension program and provide analysis using data from China Family Panel Studies (CFPS) and 25 provincial Departments of the Human Resources and Social Security (DOHRSS) in China. Our analysis shows that rural residents’ trust in government will influence their contributions to the pension programs by affecting their expected return of the investments. Our results suggest that the government should improve rural residents’ trust in government in order to develop a successful and sustainable rural pension program.
Эмпирическое условие стационарности двумерных течений ионизующегося водорода в канале плазменного ускорителя
Authors: Козлов Андрей Николаевич , Kozlov Andrey Nikolaevich , Коновалов Вениамин Сергеевич , Konovalov Venyamin Sergeevich
Published: December 2022

Рассмотрены стационарные и неустойчивые пульсирующие течения ионизующегося водорода в канале квазистационарного плазменного укорителя. Численные исследования двумерных осесимметричных течений проведены на основе системы
модифицированных МГД уравнений в приближении локального термодинамического равновесия с учетом электропроводности, теплопроводности и переноса излучения. Обобщение результатов расчетов привело к формулировке эмпирического условия стационарности двумерных течений ионизующегося газа.
Экспериментальное и численное исследование динамики развития неустойчивости Рэлея-Тейлора при числах Атвуда, близких к единице
Authors: Брагин Михаил Дмитриевич , Bragin Mikhail Dmitrievich , Гуськов Сергей Юрьевич , Gus'kov Sergei Yur'evich , Змитренко Николай Васильевич , Zmitrenko Nikolai Vasil'evich , Кучугов Павел Александрович , Kuchugov Pavel Aleksandrovich , Лебо Иван Германович , Lebo Ivan Germanovich , Левкина Евгения Валентиновна , Levkina Evgeniya Valentinovna , Невмержицкий Николай Васильевич , Nevmerzhitskii Nikolai Vasil'evich , Синькова О Г , Sin'kova O G , Стаценко В П , Statsenko V P , Тишкин Владимир Федорович , Tishkin Vladimir Fedorovich , Фарин Иван Романович , Farin Ivan Romanovich , Янилкин Юрий Васильевич , Yanilkin Yurii Vasil'evich , Яхин Рафаэль Асхатович , Yakhin Rafael' Ashatovich
Published: December 2022

В настоящей работе представлены экспериментальные и численные результаты исследования динамики роста детерминированных, определенным образом заданных начальных возмущений. Возникновение, рост и дальнейшая эволюция неоднородностей контактной границы происходит благодаря развитию неустойчивости Рэлея-Тейлора на границе раздела газ-жидкость, в частности (в данной работе), воздухвода. Существенная разница плотностей выбранных веществ приводит к заметному замедлению динамики неустойчивости Кельвина-Гельмгольца, отвечающей за образование грибообразных структур, и, как следствие, к более длительному росту струй воды и более позднему моменту начала их разрушения и перехода к перемешиванию. Выполнено количественное сопоставление натурных данных, зафиксированных на оригинальной экспериментальной установке, описание которой приводится в настоящей работе, с расчетными данными, полученными с использованием различных численных методик. В основе численного моделирования лежит полная 2D гидродинамическая модель описания динамики развития неустойчивости Рэлея-Тейлора. Поверхностным натяжением (вода-воздух) и вязкостью (воды или воздуха) в данном исследовании пренебрегается. Измеренные в эксперименте и найденные в расчетах параметры развития неустойчивости свидетельствует об удовлетворительном согласии полученных данных. Приведенные в данном исследовании количественные результаты оправдывают использование модели классической гидродинамики для описания наблюдаемых в данном опыте движений жидкости и газа и достаточно точную численную реализацию соответствующей модели в применяемых здесь разностных методиках. Существенным элементом проведенного исследования является изучение развития турбулентного перемешивания в зависимости от вполне определенных начальных условий и возникающих в этом случае новых закономерностей законов перемешивания разноплотных сред.
Исследование эффективности моделей прогнозирования нагрузки серверов оператора сотовой связи
Authors: Семенова Ирина Владимировна , Semenova Irina Vladimirivna , Ильдияров Роман Евгеньевич , Ildiyarov Roman Evgen'evich
Published: December 2022

Задача прогнозирования возможных нагрузок в работе сети сотовой связи может быть сведена к построению прогноза о возможном количестве обращений в заданный промежуток времени к одному шлюзу (PGW). Располагая такой информацией для всех шлюзов в сети, можно организовать оптимальное распределение ресурсов, предотвратить перегрузку шлюзов и, как следствие, сбои в работе всей сети. Проведен статистический анализ реальных данных, собранных автоматизированными измерительными комплексами на узлах одной из мобильных сетей, выявлены данные, наиболее подходящие для построения моделей прогнозирования. Представлены результаты исследования возможности и эффективности прогнозирования нагрузки серверов с использованием математических моделей, построенных при помощи следующих методов машинного обучения: линейная регрессия, $k$-ближайших соседей и random forest. Установлено, что для решения задачи построения краткосрочного прогноза о количестве запросов, которые поступят на сервер, не обязательно использовать сложные и требующие вычислительных ресурсов модели. На основании рассчитанных значений метрик качества установлено, что наиболее точный прогноз может быть получен при помощи модели линейной регрессии.
Sonicate Fluid Cellularity Predicted by Transcriptomic Deconvolution Differentiates Infectious from Non-Infectious Arthroplasty Failure
Authors: Fisher Cody R. , Krull Jordan E. , Bhagwate Aditya , Masters Thao , Greenwood-Quaintance Kerryl E. , Abdel Matthew P. , Patel Robin
Published: December 2022

Background:

Although cellularity is traditionally assessed morphologically, deep sequencing approaches being used for microorganism detection may be able to provide information about cellularity. We hypothesized that cellularity predicted using CIBERSORTx (Stanford University), a transcriptomic-based cellular deconvolution tool, would differentiate between infectious and non-infectious arthroplasty failure.

Methods:

CIBERSORTx-derived cellularity profiles of 93 sonicate fluid samples, including 53 from subjects who underwent failed arthroplasties due to periprosthetic joint infection (PJI) (abbreviated for the purpose of this study as PJIF) and 40 from subjects who had undergone non-infectious arthroplasty failure (abbreviated NIAF) that had been subjected to bulk RNA sequencing were evaluated.

Results:

Samples from PJIF and NIAF subjects were differentially clustered by principal component analysis based on the cellularity profile. Twelve of the 22 individual predicted cellular fractions were differentially expressed in the PJIF cases compared with the NIAF cases, including increased predicted neutrophils (mean and standard error, 9.73% ± 1.06% and 0.81% ± 0.60%), activated mast cells (17.12% ± 1.51% and 4.11% ± 0.44%), and eosinophils (1.96% ± 0.37% and 0.42% ± 0.21%), and decreased predicted M0 macrophages (21.33% ± 1.51% and 39.75% ± 2.45%), M2 macrophages (3.56% ± 0.52% and 8.70% ± 1.08%), and regulatory T cells (1.57% ± 0.23% and 3.20% ± 0.34%). The predicted total granulocyte fraction was elevated in the PJIF cases (32.97% ± 2.13% and 11.76% ± 1.61%), and the samples from the NIAF cases had elevated predicted total macrophage and monocyte (34.71% ± 1.71% and 55.34% ± 2.37%) and total B cell fractions (5.89% ± 0.30% and 8.62% ± 0.86%). Receiver operating characteristic curve analysis identified predicted total granulocytes, neutrophils, and activated mast cells as highly able to differentiate between the PJIF cases and the NIAF cases. Within the PJIF cases, the total granulocyte, total macrophage and monocyte, M0 macrophage, and M2 macrophage fractions were differentially expressed in Staphylococcus aureus compared with Staphylococcus epidermidis-associated samples. Within the NIAF cases, the predicted total B cell, naïve B cell, plasma cell, and M2 macrophage fractions were differentially expressed among different causes of failure.

Conclusions:

CIBERSORTx can predict the cellularity of sonicate fluid using transcriptomic data, allowing for the evaluation of the underlying immune response during the PJIF and NIAF cases, without a need to phenotypically assess cell composition.
Productivity Analysis Using Pospac Method And Performance Prism At Pt Petrokopindo Cipta Selaras
Authors: Prastyo Anjasmoro Bagas , Sulistiyowati Wiwik
Published: December 2022

PT. PCS is an industry that supplies organic fertilizer products. In production activities at PT. PCS onlycalculates productivity from the efficiency of raw material costs, fuel cost efficiency, and profit from sales. And theperformance measurement system at PT. PCS has not displayed optimal industrial performance, from companyleaders, employees or workers, to suppliers or suppliers. With these problems, it is necessary to measure and improveto minimize the decline in productivity, and also to improve the performance of the company's stakeholders at PT.PCS. To find out which month the dominant increase and decrease from the results of the level and productivity indexcan use the POSPAC method and use the performance prism method to analyze the company's performance for eachstakeholder. With this, it can determine the weight of the smallest value of the measurement specification based onthe POSPAC indicator of the achievement of KPIs. From the results of the study, it can be seen that the increase inthe results of the level and productivity index in 2019-2020 was dominant in August, while for the decline in the resultsof the level and productivity index in 2019-2020, it was dominant in October and November. Meanwhile, from theresults obtained in the elaboration of measurement specifications based on POSPAC indicators from KPIachievements, including the percentage of workers who are satisfied and comfortable with the work environment, thepercentage of estimated time to find the cause of the problem, the percentage of product shortages and excess stock,the level of employee ability, the percentage of complaints bill payments. With these problems from the PT.Petrokopindo Cipta Selaras can implement a productivity measurement system using the POSPAC method, andevaluate each performance indicator with a performance prism on a regular basis.
Optimization of Dynamix Cement Inventory Planning with Tsukamoto's Fuzzy Inventory Method at PT TRACK
Authors: Azhariani Gusti Nurina , Sukmono Tedjo
Published: December 2022

In 2021, PT TRACK has an average Dynamix Cement inventory of 1,488 sacks/month and the highest inventory can reach 2,240 sacks. The high inventory capacity has an impact on inventory capacity that exceeds the maximum inventory limit (overload). This study aims to determine the optimal amount of Dynamix Cement inventory at PT TRACK so that it does not cause inventory overload. The method used is Fuzzy Inventory Control Tsukamoto. Several stages carried out in this research include (a) forming Fuzzy sets, (b) forming rules (c) inference, and (d) affirmation (defuzzification). The results of this study showed that the optimal supply of Semen Dynamix at PT TRACK in the period December 2020 to December 2021 was 1350 sacks, 1480 sacks, 1300 sacks, 1290 sacks, 1300 sacks, 1350 sacks, 1370 sacks, 1490 sacks, 1790 sacks, 1510 sacks, 1280 sacks, 1300 sacks, and 1320 sacks. Based on the estimated inventory of PT TRACK's Dynamix Cement, the total inventory of Dynamix Cement in the next period using the Tsukamoto Fuzzy Inventory method is 1380 sacks.
Application of Capital Market Investment Planning Expert System Using Website-Based Forward Chaining Method
Authors: Putra Rakhmad Fahmi , Sumarno
Published: December 2022

Good investment planning is the beginning to achieve investment goals. Price fluctuations in the capital market and financial behavior are the guides for the community in making investment plans. The low level of financial literacy in the community causes people to more often forget to make investment plans and if they are made only based on feelings. Thus, it is necessary to have a system that helps the community to make effective investment plans. The expert system was chosen for that because it has everything needed to meet these needs. In this study, the expert system uses the forward chaining method. After developing the expert system, it runs well and can meet the needs of the community.
Application Of Website-Based Men’s Fashion Purchase Application (Blibli Shionpri)
Authors: Agusman Aidin Fajar Shodiq , Taurusta Cindy
Published: December 2022

The use of smartphone from year to year is getting more dan more enthusiasts and will continue to increase everyyear, this is due to the increasingly rapid development of the times. The existence of social media features that are easy to accessand offered with their respective benefits and goals will centainly make it easier for users to communicate and find out updatedinformation, one of which is in conducting online buying and selling transactions. Fashion is one of the things that is widelyfollowed by its development, buying fashion online aims to make buying and selling transactions easily and comfortably withoutany geographical constraints, saving energy, shortening time and being cheap, easy to find the desired item, and establishinggood cooperative relationships. Both between the seller and the buyer. However, there are several problems that are oftenexperienced by users of online buying and selling transaction services. This has a solution with a strong information and securitysystem in order to provide more satisfaction for users of online buying and selling services.
A review of the literature on childhood executive functions in Zambia
Authors: Walubita Gabriel
Published: December 2022

Executive functions development has received a considerable amount of attention in the literature and is known to predict a range of social, cognitive and emotional outcomes in both children and adults; however, little is known about factors that contribute to its development in the Zambian context due to the fragmented literature available in Zambia. A literature review was conducted using five electronic databases (University of Zambia Institutional repository, Google scholar, PubMed, BioMed Central and EBSCO Host) to identify factors that affected executive functions in preschool and primary school children in Zambia. This review established that early childhood education, socio-economic status, physical health, and culture as factors that fall under three categories namely research, environmental and biological affect the development of executive functions among children in Zambia. This review suggests that teachers, caregivers and early childhood stakeholders in Zambia need to pay attention to both environmental and biological factors when designing executive function interventions for preschool children. A focus on improving early childhood education, nutrition, access to good quality health care, intensifying appropriate cognitive stimulating parenting and teaching practices that boost EF in public preschool and primary schools is required
MAPPING GROUNDWATER CONTAMINATION FROM GAS STATIONS USING GROUND PENETRATING RADAR (GPR) IN AMAZONIA, BRAZIL
Authors: Castro Sanny , Souza do Nascimento Fernanda , Fenzl Nobert
Published: December 2022

The Ground Penetration Radar (GPR/ GSSI-SIR 3000-Common-offset) was used to detect and scale underground structures and hydrocarbon pollution plumes around gas stations in the municipality of Santarém (Pará/ Amazon/ Brazil). Two of them are among the oldest in the city and they are located in a very populated area, which can represent a great risk of subsoil and groundwater contamination because of fossil fuel leaks. The present research used 100 ns and 175 ns time windows, with a 270 MHz antenna, and the received data were processed via Software Reflex Win/ V4.5.5. The results showed that the fuel tanks are best reflected in the 100 ns configuration, while the water table and the hydrocarbon plume were more clearly identified in the 175 ns configuration due to the greater depth range. Therefore, the shallow mapping of the subsoil with the GPR method, using the two complementary configurations, was effective in locating and delineating hydrocarbon plumes up to a depth of 4 meters. Thus, the method proved to be efficient in obtaining important data to guide sanitation and public health services and the elaboration of environmental public policies and licensing of companies dealing with potentially polluting activities.
SEGURANÇA HÍDRICA NA ÁREA DA RESEX DE SÃO JOÃO DA PONTA - RIO MOCAJUBA (PA)
Authors: Cuesta Jhanier Salas , MEIGUINS DE LIMA ALINE MARIA , Pimentel Marcia Aparecida da Silva , Mendes Ronaldo Lopes Rodrigues , Silva Ricardo Angelim da
Published: December 2022

O acesso a água para consumo humano é essencial para a manutenção da qualidade de vida tanto no ambiente rural quanto urbano, porém este depende de um conjunto de políticas que envolvem saneamento, desenvolvimento das cidades, meio ambiente, recursos hídricos e agrícola. Este trabalho teve como objetivo avaliar os usos múltiplos das águas e a segurança hídrica associada, na área da Reserva Extrativista de São João da Ponta (bacia hidrográfica do rio Mocajuba, Costa Atlântica Amazônica, estado do Pará). A metodologia adotada foi teórico-prática com levantamento de dados (secundários e primários) na sede municipal de São João da Ponta e na comunidade de Jacarequara. Na avaliação quanto ao aproveitamento da água da chuva foram adotados os procedimentos da NBR 15527. O consumo de água no setor produtivo foi caracterizado por: 12.699 m³.ha-1 (produção agrícola), 40.644 m³.dia-1 (criação de animais); com demanda social de 146 l/hab.dia-1. Sendo o aproveitamento da água da chuva viável para pequenas comunidades, porém precisando de orientação técnica e suporte financeiro para sua implementação. Existe uma demanda de consumo que justifica a discussão da segurança hídrica preventiva, principalmente pelo acesso à água em qualidade e quantidade apropriadas, com o fortalecimento e/ou de implantação de ações de ordenamento do território que priorizem a garantia da disponibilidade hídrica.
Protocol for a multicenter study on (cost)effectiveness of the Back At work After Surgery (BAAS): a clinical pathway for knee arthroplasty
Authors: Strijbos Daniël O. , Sluis Geert van der , Houtert Wim F.C. van , Straat A. Carlien , Zaanen Yvonne van , de Groot Stephan , Klomp Simon , Krijnen Wim P. , Kooijman Carolien M. , Brand Igor van den , Reneman Michiel F. , Boymans Tim A.E.J. , Kuijer P. Paul F.M.
Published: December 2022

Background
Optimizing return to work (RTW) after knee arthroplasty (KA) is becoming increasingly important due to a growing incidence of KA and poor RTW outcomes after KA. We developed the Back At work After Surgery (BAAS) clinical pathway for optimized RTW after KA. Since the effectiveness and cost analysis of the BAAS clinical pathway are still unknown, analysis on effectiveness and costs of BAAS is imperative.
Method
This protocol paper has been written in line with the standards of Standard Protocol Items: Recommendations for Interventional Trails. To assess the effectiveness and cost-effectiveness for RTW, we will perform a multicenter prospective cohort study with patients who decided to receive a total KA (TKA) or an unicompartmental KA (UKA). To evaluate the effectiveness of BAAS regarding RTW, a comparison to usual care will be made using individual patient data on RTW from prospectively performed cohort studies in the Netherlands.
Discussion
One of the strengths of this study is that the feasibility for the BAAS clinical pathway was tested at first hand. Also, we will use validated questionnaires and functional tests to assess the patient’s recovery using robust outcomes. Moreover, the intervention was performed in two hospitals serving the targeted patient group and to reduce selection bias and improve generalizability. The limitations of this study protocol are that the lead author has an active role as a medical case manager (MCM) in one of the hospitals. Additionally, we will use the data from other prospective Dutch cohort studies to compare our findings regarding RTW to usual care. Since we will not perform an RCT, we will use propensity analysis to reduce the bias due to possible differences between these cohorts.
Planning a resilient neighborhood via identification of earthquake vulnerability factors: the case study of Kouy-e Noh Dareh in Mashhad
Authors: Bastani Mojdeh , Hashemi Sajjad , Khairabadi omid
Published: December 2022

The expansion of urbanization is often followed by the growth of slums and formation of many improper settlements in cities. Earthquake is one of the most prominent hazards that many countries have to deal with. Several factors such as improper land use, faulty design and construction as well as inefficient urban infrastructures can increase the scope of the damage resulting from earthquakes in human settlements. The area under study, namely Kouy-e Noh Dareh, is located on the outskirts of the populous city of Mashhad, Iran. It is among the less privileged districts of the city and has poor physical conditions and numerous inefficiencies, including the old age and deterioration of residential units. In addition, it is rather unsuitable for any construction in terms of natural conditions. All these factors pave the way for the increased emergence of natural risks and occurrence of natural disasters, including earthquakes. The goal of this study was to plan a resilient neighborhood via identification of earthquake vulnerability factors. It attempted to determine the level of vulnerability of informal settlements against earthquakes by analyzing their current condition. The span of the vulnerable areas in the selected site were specified via factor analysis using six factors: convenient access to services, strengthening the physical structure, environmental compatibility, improving road networks, improving the public transport and improving social participation. It was found out that the eastern and western areas of the neighborhood are highly vulnerable against earthquake.
Cloud Computing Synchronization: Case of Late Emails’ Social Impact
Authors: Taifi Nouha
Published: December 2022

The latest research on cloud computing advances theories and applications in the various existing environments. The adoption of cloud computing is widely in tools as social networks, emails, applications and others. The research discusses the future of a specific type of communication tool -the emails, stating that the cloud computing supporting this tool needs further development considering the content of the email; we discuss the social aspects of these tools related to the impact of mis-synchronization on the user. The research analyzes the variables of the email content -as its type of content ranging from professional to amateur, and proposes theories and hypothesis. The research method is a questionnaire dedicated to the most strategic employees of an organization in the service sector. The results show that there are various point of views on the role of synchronization in the emails and that there is a social impact emerging from it indeed.
The big five personality traits as antecedents of panic buying
Authors: Kurnaz Aysel
Published: December 2022

This study aims to analyse the effects of personality traits as antecedents of panic buying. In extraordinary periods, certain behavioural changes could be observed in individuals, and panic buying behaviour could occur for specific products or product groups. The theoretical framework of the concept of panic buying comprises various theories, including individual and socio-psychological backgrounds. In line with the main objective of this study, the concept of panic buying is addressed in the light of theories that elaborate on individual factors. Even though there are many factors affecting panic buying, there is a limited number of studies discussing the subject within the context of personality traits, which are among the individual factors. In this study, data were acquired from 852 participants in Turkey by applying the questionnaire technique as a quantitative research method. The Big Five Personality Traits, one of the significant theories in measuring personality traits, are selected as the baseline. This study used the «The Big Five Inventor» scale. On the other hand, the «Panic Buying Scale» was applied in the measurement of panic buying. Data analysis was conducted through confirmatory factor analysis and structural equation modelling. Upon evaluating the findings, it was concluded that agreeableness (one of the five major personality traits) has a statistically significant and negative impact on panic buying. In contrast, neuroticism has a significant and positive effect. The more individuals have high agreeableness personality traits, the more panic buying decreases. Besides, the trait of high neuroticism causes an increase in panic buying. No significant effect of extraversion, conscientiousness, and openness personality traits on panic buying was determined. The findings indicate the effects of personality traits on the individual causes of panic buying behaviour. It is anticipated that this study will fill the relevant gap in the literature concerning considering personality traits as an antecedent of panic buying in the context of Turkish participants and examining both individual characteristics and cultural effects. Understanding the basic motivations of individuals regarding panic buying behaviour is of utmost importance for correctly managing the processes for similar extraordinary periods that may occur again in the future and for taking the necessary precautions.
Corneal confocal microscopy in the diagnosis of non-infectious etiology uveitis
Authors: Razumova I. Yu. , Surnina Z. V. , Agaeva L. М.
Published: December 2022

Uveitis is one of the leading causes of blindness worldwide. Uveitis accounts for 10 to 15% of cases of complete vision loss and up to 35% of reversible vision loss. Particularly alarming is the fact that the debut of uveitis is recorded at a young working age. Uveitis includes a heterogeneous group consisting of at least 30 nosologies associated with various etiologies. The prognosis of the disease directly depends on the timely detection of its etiology. The review analyzes widely used methods for diagnosing patients with non-infectious uveitis. Special attention is paid to the advantages of confocal microscopy of the cornea, as the most modern non-invasive method that allows a detailed quantitative assessment of corneal subepithelial nerve plexuses and dendritic cells, the number of which increases during inflammatory processes, as well as a qualitative analysis of corneal precipitates and endothelial cells. Early detection of uveitis, which is an extra-articular manifestation of spondyloarthritis, allows appropriate treatment of severe systemic disease. It is assumed that the use of new approaches in the diagnosis of uveitis will prevent the development of severe complications up to complete loss of vision and improve the quality of life of patients.
KURUMSAL KİMLİK BAĞLAMINDA RADYO SLOGANLARI
Authors: KIYIK KICIR Güzin
Published: December 2022

Kurumsal kimlik; işletmelerin faaliyet konusu, amaçları, hedef kitlesi, neyi temsil ettiği gibi sorular üzerinde şekillenen bir kavramdır. Kurumları diğerlerinden ayıran kimlik konusu paydaşlarla iletişim kurma bağlamında da önemlidir. İletişim için önemli bu kavramı, yine iletişim sektöründe yer alan radyo işletmeleri için ele aldığımızda, Türkiye’deki radyolarda sloganların, kurumsal kimliği yansıtma biçimini analiz etmek bu çalışmanın temel amacını oluşturmaktadır. Ülkemizdeki radyoların tercih ettiği sloganlar, sloganların temsil gücü, sektörün eğilimleri araştırma kapsamında yanıt aranan sorular arasındadır. Nitel araştırma metodunun tercih edildiği makale kapsamında ülkemizde en çok dinlenen ulusal kategorideki 25 radyo tespit edilmiştir. Bunlar arasında örnekleme dâhil olanlarla yapılan görüşmelerden gelen yanıtlar, belirlenen tema ve kodlarla betimsel olarak analiz edilmiştir. Sonuç olarak; müzik türüne, yayın formatına, dinleyici profiline göre farklılaşan sloganların radyo işletmelerini temsil gücüne yapılan vurgu dikkati çekerken, program içerikleri, logo, jingle ve görseller üzerindeki etkileşim güçlü görülmektedir. Makalede radyo yayıncılığı alanındaki sloganların birbirine benzeme eğilimi göstermesi de önemli bir diğer sonuçtur.
Behavior of the mandibular length in class II non-growing patients treated with jaw functional orthopedics
Authors: Carneiro Chagas Tanus Rita de Cássia , Santiago Orlando
Published: December 2022

Class II treatment is the leader of seeking for dentofacial correction in offices all around the world due, mainly, to facial esthetics impairment caused by this malocclusion. Mandibular forward repositioned is needed for the majority of this treatment. Jaw Functional Orthopedics (JFO) is a recognized protocol to treat Class II in growing patients. The aim of this investigation is to study the behavior of mandibular length in class II non-growing patients treated with JFO. Distance between Gonion and Mento were measured in lateral teleradiographs at T0 and T1 (from 18 to 21 months of treatment) of non-growing class II patients under treatment with JFO and mandibular supplementary growth was found (P = 0,006). In the sample studied jaw functional orthopedics showed to be efficient to correct the overjet in class II non-growing patients. Mandibular advancement with functional orthopedic appliances promotes a supplementary mandibular growth in non-growing patients. Further studies are necessary for a better comprehension of the subject.