bluuebunny/crossref_metadata_2025 huggingface dataset:
2D Propagation Simulation of Variation Parameters of U-shape Fiber Optic
Authors:   Centre for Pre-university Studies, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia., Arif Noor Azie Azura Mohd , Berhanuddin Dilla Duryha ,   Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Malaysia., Ehsan Abang Annuar ,   Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Malaysia.
Published: February 2021

Fiber optic has extraordinary properties and is suitable in sensor applications due to its special potential. Currently, macro bending characteristics of newly developed hetero core fiber optic element are designed and evaluated. This paper presents the preliminary results obtained from the numerical simulation analysis of the bending sensitivity of U-shape fiber optics toward the 2D electromagnetic wave in terms of mesh, curvature radius, core fiber size, and turn number. Fiber optics with core sizes of 4, 9, 50, and 62.5 μm were designed. In addition, the combination of core diameters 50-4-50, 50-9-50, 62.5-4-62.5, and 62.5-9-62.5 μm is evaluated to compare the outcome of transmission power in terms of hetero core structure of fiber optic. Simulation is performed using COMSOL Multiphysics simulation tool. The developed U-shape fiber optic is designed to sense the distortion of reducing power transmission by comparing input and output power. Results show that the selected mesh depends on the size of geometry bending fiber optics, and fine and finer mesh is the best for U-shape fiber optic. Furthermore, the power flow on the fiber decreases with the decreasing curvature radius and increasing turn number. The fiber with a core size combination of 62.5–4–62.5 um has high sensitivity in terms of loss. The attained results possess higher potential in the field of sensor applications, such as displacement, strain, pressure, and monitoring respiration, on human body. This study serves as a basis for further investigation of nanomaterial coating on fiber optics, thereby enhancing its credibility for sensing.
Applying Deep Learning Neural Networks in Predicting Students' Cumulative Grades
Authors:   National Egyptian E-Leaning University (EELU), Giza, Egypt., Abbas Elmasry, Mohamed
Published: February 2021

The distinguished universities aim to provide quality education to their students. One way to achieve the highest quality in university studies is to discover knowledge to predict student performance and grades in courses etc. Recently, the amount of data stored in educational databases is accumulating very quickly, as these databases contain indirect information that can be used to improve student performance. Academic performance is affected by many factors, so it is necessary to predict student performance to determine the difference between students who are excelling in studies and students who need to exert more effort to improve their performance and their level of achievement. Hidden or Indirect knowledge is part of the educational data set and can be extracted using various means, such as data mining techniques and the use of classification, and deep learning through neural networks. This paper has been designed to extract knowledge describing students' performance in the courses required for graduation, in a way that helps academic advisors in providing academic advice and guidance to students to improve their cumulative grades.
Iris Segmentation Based on Black Hole Algorithm for Biometric System
Authors:   her, postgraduate at this College of Science and was awarded M.SC. degree in Computer Science , University of Sulaimani City Sulaimani, Lecturer in Salahaddin University Erbil in Collge of Engineering department Software Engineering ,in city Erbil in Country.Iraq., Qadir Tara Othman , Taujuddin N. S. A. M, ,   Faculty of Electrical and Electronic Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia.
Published: February 2021

Current iris recognition schemes such as IntegroDifferential method, Hough Transform, Watershed Transform Circle Fitting, and Circular Hough Transformation (CHT) are used to find circular parameters between pupil and iris. Segmentation process of an eye image using the circular parameters toextracts the iris region still can be further improved. In this paper, we introduced an optimization method of circular parameters detection for iris segmentation based on Black Hole Algorithm (BHA). The proposed segmentation algorithm utilizes a computational model of the pixels’ value to detect the iris boundary. The BHA searches for center radius of both pupil and iris. The system tests the CASIA Iris Interval V3 database by on MATLAB. The segmented images show an accuracy of 98.3%. In short, the segmentation-based on BHA is efficient to identify the iris for any future access control applications.
Balancing of Common DC-Bus Parallel Connected Modular Inductive Power Transfer Systems
Authors: AYAZ Enes
Published: February 2021

The aim of this paper is to design a modular,
fault tolerant multi transmitter(Tx) -multi receiver(Rx) parallel
connected common DC bus inductive power transfer(IPT) system
to replace slip rings in wind turbines or brushless exciters. In
parallel connected common DC bus systems, current unbalance
is a major issue which results in thermal stresses and over
current or voltages. In this paper, two different new current
balancing methods are proposed: Cross-coupled Rx modules and
intentional miss-tuning of Rx side resonant frequency. These
methods are investigated both analytically and experimentally
for a single Tx and two Rx system for a 500 W prototype.
The proposed methods are tested independently, and then the
combined current balancing method is also investigated. For the
same missalignment case cross-coupled/de-tuned has a 55.8%
current balancing improvement compared to de-coupled/fullytuned topology.
A Novel Pilot Spoofing Scheme via Intelligent Reflecting Surface Based On Statistical CSI
Authors: yang jie , Ji Xinsheng , Wang Feihu , Huang Kaizhi , Zhou You
Published: February 2021

Pilot spoofing attack brings challenges to the physical layer secure transmission. However, since the inherent characteristics of wireless environment have not changed, active eavesdropping can be detected based on prior information. Intelligent reflecting surface (IRS), with the real-time programmable characteristics for wireless environment, provides new possibilities for effective pilot spoofing. In this paper, the IRS is deployed near the legitimate users and the control strategy is embeded into the legitimate communication process under time-division duplex (TDD) mode to assist eavesdroppers to implement pilot spoofing. By designing different phase shifts at the IRS during the uplink phase and downlink phase, the channel reciprocity between uplink and downlink disappears, and thus secure beamforming vector is biased towards the eavesdropper. Furthermore, in order to obtain more information, the average secrecy rate minimization based on statistical channel state information is established by carefully designing the phase shifts. The formulated problem is non-trivial to solve. By using alternating optimization and Charnes-Cooper transformation technique, the original problem is transformed into convex form and a sub-optimal solution is achieved. Finally, simulation results show that our proposed scheme poses serious secure threat without any energy footprint especially for TDD systems.
Synthesis of High Directivity Beams for Conformal Sources
Authors: Leone Giovanni , Munno Fortuna , Solimene Raffaele
Published: February 2021

The
role of the source geometry in the the radiation of focusing beams by
conformal antennas is examined by the comparison of their directivity functions
at different maximum directions. An
inverse source problem approach is adopted, where solutions stable with respect
to data uncertainties are to be found by relying on the analysis of the
pertinent operator by the Singular Values Decomposition. This general framework
allows to connect the mean value of the mazimum directivity function to the
Number of Degrees of Freedom of the conformal source, which depends only on its
electrical length. For each source geometry the focusing far field ensuring the
maximum directivity for every pointing direction and the corresponding source
current are obtained. The comparison with the ones achieved by the usual phase
compensation technique of the source current reveals their optimal behavior.
The usefulness of the approach as a tool in antenna synthesis is shown by
comparing different geometries for those applications where identical beams are
required to be rdiated for the coverage of a larga angular domain.
maths inside Resource Suite with Interdisciplinary Learning Activities
Authors: Baird Natalie , Shah Tanushree Bharat , Clacy Ali , Gerontogiannis Dimitrios , Mackenzie Jay , Nkansah David , Quinn Jamie , Spencer-Wood Hector , Thomson Keren , Wilson Andrew
Published: February 2021

Maths inside is a photo competition open to everyone living in Scotland, hosted by the University of Glasgow. The maths inside project seeks to nourish a love for mathematics by embarking on a journey of discovery through a creative lens. This suite of resources have been created to inspire entrants, and support families, teachers and those out-of-school to make deeper connections with their surroundings. The maths inside is waiting to be discovered! Also contained in the suite is an example to inspire and support you to design your own interdisciplinary learning (IDL) activity matched to Education Scotland experiences and outcomes (Es+Os), to lead pupils towards the creation of their own entry. These resources are not prescriptive, and are designed with a strong creativity ethos for them to be adapted and delivered in a manner that meets the specific needs of those participating. The competition and the activities can be tailored to meet all and each learners' needs. We recommend that those engaging with maths inside for the first time complete their own mapping exercise linking the designed activity to the Es+Os. To create a collaborative resource bank open to everyone, we invite you to treat these resources as a working document for entrants, parents, carers, teachers and schools to make their own. Please share your tips, ideas and activities at info@mathsinside.com and through our social media channels. Past winning entries of the competition are also available for inspiration and for using as a teaching resource. Already inspired? Enter the competition!
Strategi Wartawan Radar dalam Menangkal Berita Hoax
Authors: Rasyiida Hayyu , Irfani Fahmi , Hamdani Ikhwan
Published: February 2021

Di dalam aktivitas jurnalistik, wartawan dan media sangat berperan penting dalam hal mencari dan menyebarluaskan suatu informasi dan berita di media online, termasuk penangkalan berita hoax. Dimasa pandemi Covid-19 ini, banyak wartawan, termasuk wartawan Radar Bogor yang meliput tentang berita-berita tersebut. namun tidak dapat dipungkiri bahwa banyak juga berita yang tidak akurat yang disebarkan oleh pihak yang tidak bertanggung jawab yang tidak didasari oleh fakta yang sebenarnya yang dikenal dengan istilah hoax. Penelitian ini berjudul “Peran Penting Wartawan Radar Bogor Dalam Menangkal Pemberitaan Hoax Covid-19 di Media Online”. Adapun tujuan penelitian ini, membahas tentang bagaimana langkah-langkah  yang dilakukan oleh wartawan Radar Bogor dalam menangkal berita-berita hoax Covid-19 di media online. Begitu juga dengan sanksi sanksi yang diberikan oleh pihak Radar Bogor kepada wartawannya jika ada yang menyebarkan berita hoax Covid-19. Penelitian ini menggunakan metode kualitatif dengan pendekatan komunikasi dimana secara langsung mendapatkan informasi dari informan. Metode yang digunakan penulis adalah observasi dan wawancara. Hasil keseluruhan dari penelitian ini menun jukkan bahwa sampai saat ini berita yang diberikan oleh wartawan media online Radar Bogor adalah fakta. Karena wartawan Radar Bogor sudah mentaati langkah-langkah yang menjadi dasar dalam pembuatan berita yang aktual
Sosialisasi dan Antisipasi LGBT pada Tingkat Remaja dan Dewasa bagi Warga Kelurahan Sempur Melalui Penggunaan Media Luar Ruang
Authors: Soelistyowati Rr. Dinar , Sovianti Rina
Published: February 2021

Komunikasi adalah keterampilan yang melekat sejak kita lahir. Zaman dan teknologi semakin berkembang, menjadikan nilai norma dan moral semakin menurun, hal ini di buktikan dengan adanya penyimpangan dalam menjalin hubungan asmara antar individu. Contohnya mereka yang berorientasi pada hubungan sejenis (homoseksual) seperti Lesbian dan Gay, hubungan ganda (dual-sexual) atau Biseksual, serta mereka yang berpindah status gender atau Transgender. Kelompok ini lebih dikenal dengan istilah LGBT dan menjadi penyakit masyarakat. Tujuan penelitian yaitu meningkatkan pengetahuan, wawasan serta pemahaman munculnya fenomena LGBT dan seks bebas. Metode penelitian menggunakan metode sosialisasi dan diskusi. Hasil penelitian yaitu kegiatan sosialisasi tahap pertama dengan materi sosialisasi memberikan informasi umum mengenai fenomena LGBT, tahap kedua dengan materi warga akan mendapatkan pemahaman lanjutan tentang awal kemunculan, hingga proses komunikasi yang memberikan dampak negatif, dan tahap ketiga atau terakhir, warga akan menerima penerapan langkah preventif terhadap penyebaran komunikasi kelompok LGBT di lingkungan sekitarnya khususnya yang menuju kepada perilaku menyimpang seperti seks bebas sejenis. Kesimpulan penelitian ini yaitu dibentuknya publikasi eksternal berupa jurnal dan menyadarkan warga kelurahan Sempur terhadap keberadaan kelompok homoseksual dan transgender pada lingkungan tersebut.
Persepsi Guru Terhadap Pembelajaran Daring (E-Learning) Siswa Kelas IV SDN Sangiang Jaya Pada Masa Pandemi Covid 19
Authors: Ayu Wanda Fidinda Meiga , Magdalena Ina , Windi Anisa Fadiyah , Annisa Ramdhini Siti
Published: February 2021

Penelitian ini bertujuan untuk memaparkan informasi terkait persepsi guru mengenai pembelajaran daring (E-Learning) dirumah akibat dampak dari pandemi COVID-19. Yang berisikan dampak dan kendala dari pembelajaran daring kelas IV SD. Informasi didapatkan dari hasil wawancara yang dilakukan dengan wali kelas IV SD SANGIANG JAYA. Metode yang digunakan dalam penelitian ini adalah metode penelitian kualitatif. Hasil dari penelitian ini menunjukkan bahwa pembelajaran daring tidak cocok digunakan pada tingkat sekolah dasar khususnya siswa kelas IV. Karena pada dasarnya pembelajaran anak sekolah dasar masih berpusat kepada guru. Pembelajaran daring membuat tujuan pembelajaran tidak tersampaikan sepenuhnya kepada peserta didik. Masih banyak guru yang kurang pemahaman dalam IPTEK, sehingga pembelajaran daring menjadi tidak menarik. Masih kurangnya sarana dan prasarana yang mendukung seperti android, sinyal jaringan seluler dan kuota.
Операторные гипергеометрические функции
Authors: Глушак Александр Васильевич , Glushak Alexander Vasilevich
Published: February 2021

Рассматриваются операторные гипергеометрические функции ${_1}F_2(\cdot)$ и ${_2}F_3(\cdot)$, построенные по неограниченному оператору. С их помощью решены задачи Коши для сингулярных интегро-дифференциальных уравнений. Приводится новая пара подобных операторов.
Нахождение параметров конформного отображения из полуплоскости на круговой многоугольник
Authors: Колесников Иван Александрович , Kolesnikov Ivan Aleksandrovich
Published: February 2021

Решается задача о построении конформного отображения из полуплоскости на круговой многоугольник. Прообразы вершин многоугольника и акцессорные параметры определяются с помощью обобщения метода П. П. Куфарева определения параметров в интеграле Кристоффеля - Шварца. Метод основан на использовании уравнения Левнера с граничной нормировкой. Отдельно решается задача о построении отображения из полуплоскости на внешность многоугольника с границей из прямолинейных отрезков. Приведены примеры конкретных отображений, параметры которых найдены методом Куфарева.
Алгоритмы в прямых разложениях абелевых групп без кручения
Authors: Благовещенская Екатерина Анатольевна , Blagoveshchenskaya Ekaterina Anatol'evna , Штрюнгманн Люц , Strungmann Luts
Published: February 2021

Графическая теория прямых разложений абелевых групп без кручения определенного вида положена в основу алгоритмического построения множества их прямых разложений, удовлетворяющим заданным условиям.
Интегрирование по неспрямляемым кривым как распределение
Authors: Кац Давид Борисович , Kats David Borisovich
Published: February 2021

Работа представляет собой обзор результатов, связанных с обобщением понятия криволинейного интеграла на неспрямляемые кривые, показателями Марцинкевича, новыми метрическими характеристиками, введеными автором, и их приложениями.
Сходимость проекционно-разностного метода приближенного решения гладко разрешимого параболического уравнения с весовым интегральным условием
Authors: Петрова Анастасия Александровна , Petrova Anastasiya Aleksandrovna
Published: February 2021

В гильбертовом пространстве абстрактное линейное параболическое уравнение с нелокальным весовым интегральным условием на решение решается приближенно проекционно-разностным методом с использованием по времени неявного метода Эйлера. Аппроксимация задачи по пространственным переменным ориентирована на метод конечных элементов. Рассматривается случай произвольных проекционных подпространств типа конечных элементов. При этом на решение накладывается условие дополнительной гладкости. Установлены оценки погрешностей приближенных решений, сходимость приближенных решений к точному решению и порядки скорости сходимости.
Аналоги неравенств Полиа - Сеге и Макаи для евклидова момента инерции выпуклой области
Authors: Гафиятуллина Лилия Ильгизяровна , Gafiyatullina L I
Published: February 2021

В статье получены двусторонние оценки для евклидова момента инерции $\mathrm{I}_{2}(G)$ выпуклой области $G$ на плоскости через геометрические характеристики данной области, аналогичные неравенствам Полиа - Сеге и Макаи для жесткости кручения.
Порождающие множества полной полугруппы бинарных отношений, определенные полурешетками класса $\Sigma_4(X,4)$
Authors: Диасамидзе Я , Diasamidze Ya , Цинаридзе Н. , Tsinaridze N , Тавдгиридзе Г. , Tavdgiridze G
Published: February 2021

В статье изучаются порождающие множества полной полугруппы бинарных отношений, определенные $X$-полурешетками объединений класса $\Sigma_4(X,4)$. Найдены единственные неприводимые порождающие множества для данных полугрупп.
Группы с конечным числом изоморфных классов подходящих подгрупп
Authors: Курдаченко Леонид Андреевич , Kurdachenko Leonid Andreevich , Лонгобарди П. , Longobardi P. , Май М. , Maj M.
Published: February 2021

Изучаются группы, обладающие следующим свойством: для некоторых подходящих семейств $\mathcal{M}$ подгрупп группы $G$ подгруппы из $\mathcal{M}$ распадаются на конечное число изоморфных классов.
О нильпотентных степенных $MR$-группах
Authors: Амаглобели Михаил Георгиевич , Amaglobeli Mikhail Georgievich , Бокелавадзе Tенгиз , Bokelavadze Tengiz
Published: February 2021

Понятие степенной $MR$-группы, где $R$ - произвольное ассоциативное кольцо с единицей, было введено Р. Линдоном. А. Г. Мясников и В. Н. Ремесленников дали более точное определение $R$-группы, введя дополнительную аксиому. В частности, это новое понятие степенной $MR$-группы является непосредственным обобщением понятия $R$-модуля на случай некоммутативных групп. В статье вводятся центральные ряды и ряды коммутантов в $MR$-группах. Обсуждаются три варианта определения нильпотентных степенных $MR$-групп ступени $n$. Доказано, что для $n=1,2$ все эти определения эквивалентны. Вопрос о совпадении этих понятий для $n>2$ остается открытым. Кроме того, доказано, что тензорное пополнение двуступенно нильпотентной $MR$-группы двуступенно нильпотентно.
ПРИКЛАДНЫЕ ЗАДАЧИ ИСПОЛЬЗОВАНИЯ ТЕХНОЛОГИЙ ВИРТУАЛЬНОЙ РЕАЛЬНОСТИ В ПРОЦЕССЕ ТРЕНИРОВКИ ПИЛОТОВ
Authors: Алексеенко М.С. , Alekseenko M.S. , Клишин Г.Ю. , Klishin G.Yu.
Published: February 2021

В статье рассмотрены актуальные вопросы подготовки пилотов гражданской авиации с использованием современных технологий создания виртуальной реальности для формирования профессиональных компетенций специалистов различных областей, в том числе операторов, инженеров, летчиков (пилотов). Показана необходимость создания единой методологии обучения летного состава с использованием виртуальной реальности с акцентом на возможность формирования и развития отдельных профессиональных компетенций на базе сформированных представлений о реальной профессиональной деятельности.
ПОГРЕШНОСТИ ОПРЕДЕЛЕНИЯ ЛИНЕЙНЫХ И УГЛОВЫХ КООРДИНАТ МАГНИТОМЕТРИЧЕСКОЙ СИСТЕМЫ ЛОКАЛЬНОЙ НАВИГАЦИИ
Authors: Голев И.М. , Golev I.M. , Заенцева Т.И. , Zayentseva T.I. , Угрюмов Р.Б. , Ugryumov R.B. , Попов А.С. , Popov A.S. , Ларичнев В.В. , Larinchev V.V.
Published: February 2021

В работе представлен алгоритм анализа погрешностей определения линейных и угловых координат для магнитометрической локальной системы навигации с использованием переменного магнитного поля. Для анализа проводились вычисления параметров навигационного магнитного поля при заданных (действительных) координатах подвижного объекта. В результаты расчетов вносились по определенному алгоритму погрешности измерений магнитометрических датчиков, которые использовались для вычислялись координат. Полученные таким образом значения отличались от действительных. На основе сравнения действительных и полученных значений координат проводился анализ погрешностей системы. Показано, что погрешности существенным образом зависят от расстояния до подвижного объекта. Так, при магнитном моменте 104 А×м2 на расстоянии до 30 м, абсолютные погрешности определения линейной координаты не хуже 0,003 м и угла 0,02 град, а при расстоянии 200 м - 6,8 м и 8,2 град соответственно. Данный алгоритм позволяет проводить анализ работы навигационной системы в различных внешних условиях и режимах работы, в зависимости от решаемых навигационных задач.
ПРОБЛЕМЫ, СВЯЗАННЫЕ С ПРИМЕНЕНИЕМ СИСТЕМЫ УПРАВЛЕНИЯ БЕЗОПАСНОСТЬЮ ПОЛЕТОВ В ГРАЖДАНСКОЙ АВИАЦИИ РОССИИ
Authors: Дугин Г.С. , Dugin G.S.
Published: February 2021

Приведено описание системы управления безопасности полетов (СУБП) и указана ее эффективность и степень внедрения в практику деятельности зарубежных и российских авиакомпаний. Показано участие государства в вопросе разработки нормативной документации по обеспечению безопасности полетов.
ИССЛЕДОВАНИЕ МЕТОДОВ УМЕНЬШЕНИЯ ВЛИЯНИЯ НАМАГНИЧЕННОСТИ ЭЛЕМЕНТОВ ЖЕЛЕЗНОДОРОЖНОЙ ИНФРАСТРУКТУРЫ НА РАБОТУ УСТРОЙСТВ АВТОМАТИКИ И ТЕЛЕМЕХАНИКИ
Authors: Пультяков А.В. , Pultyakov A.V. , Соколова В.В. , Sokolova V.V.
Published: February 2021

В данной статье приведены результаты проведённого патентного поиска и обзора научных изданий в рамках исследования методов уменьшения влияния намагниченности элементов железнодорожной инфраструктуры на работу устройств железнодорожной автоматики и телемеханики. Рассмотрены проблемы отказов электрических рельсовых цепей и сбоев в работе систем автоматической локомотивной сигнализации из-за негативного влияния остаточной неравномерной намагниченности рельсов и рельсовых плетей, приводящие к задержкам поездов. Проанализированы основные способы и устройства устранения неравномерной намагниченности рельсов и рельсовых плетей.
ЦИФРОВИЗАЦИЯ И АВТОМАТИЗАЦИЯ В ЛОГИСТИКЕ: НОВЫЕ ПОДХОДЫ И РЕШЕНИЯ В ЗАРУБЕЖНОЙ ПРАКТИКЕ
Authors: Тиверовский В.И. , Tiverovsky V.I.
Published: February 2021

Рассмотрен зарубежный опыт цифровизации и автоматизации складов и др. объектов логистики. Приведены примеры из практики проектирования АСУ, создания электронных платформ и разработки новых программных продуктов. Отмечена важность интегрированного подхода к созданию современных автоматизированных систем. Сообщается о новых подходах и путях решения задач цифровизации и автоматизации в свете требований концепции 4-й промышленной революции.
ОПРЕДЕЛЕНИЕ ПРИЧИН И СПОСОБОВ СНИЖЕНИЯ ДОРОЖНО-ТРАНСПОРТНОЙ СМЕРТНОСТИ В РЕГИОНАХ С ПОВЫШЕННЫМ СОЦИАЛЬНЫМ РИСКОМ ДТП
Authors: Печатнова Е. В. , Pechatnova E.V. , Павлов С. Н. , Pavlov S.N.
Published: February 2021

Рассмотрена проблема высокой дорожно-транспортной смертности в России, индикатором которой является социальный риск (СР). Основная гипотеза работы заключается в предположении о том, что первым шагом к достижению уровня нулевой смертности является определение уязвимых регионов (с повышенным СР), причин высокой смертности и разработка мер по повышению безопасности. На основе пятилетних данных рассчитан СР в каждом субъекте РФ, выделены регионы, отличающиеся в течение всего временного периода устойчивым высоким значением СР. С позиции мест возникновения ДТП определены проблемы в выделенных регионах. Предложены пути снижения смертности в выделенных регионах и в России.
Формальная демаркация знаний
Authors: Калачихин П.А. , Kalachikhin P.A.
Published: February 2021

Обсуждается формальный подход к демаркации знаний в зависимости от мнения научного сообщества. Предлагается модель классификации знаний на основании грубых множеств. Показывается связь между критериями демаркации и классификацией знаний. Формулируется пороговое правило принятия решений о демаркации разделов знаний. Обосновывается использование экспертных данных и наукометрических платформ в качестве базовых источников для принятия демаркационных решений.
Актуальные задачи диверсификации технологий, информационных продуктов и услуг
Authors: Дмитриева Е.Ю. , Syuntyurenko O.V. , Сюнтюренко О.В. , Dmitrieva E.Yu.
Published: February 2021

Рассматриваются объективные факторы-предпосылки корректировки концептуальных положений и задач информационного обеспечения современной научнопромышленной сферы. Показан спектр актуальных и перспективных направлений создания и внедрения новых технологий, информационных продуктов и услуг в структуре Государственной системы НТИ. Представлен вариант методологического подхода к управлению информационным обеспечением на основе оценки уровня информационной поддержки целевых комплексных программ и проектов. Структурирован потенциальный экономический макроэффект, определяемый результативностью решения комплекса задач по повышению уровня информационной поддержки исследований, разработок, трансфера технологий.
О некоторых оценках сложности вычислений при прогнозировании свойств новых объектов средствами характеристических функций
Authors: Забежайло М.И. , Zabezhailo M.I.
Published: February 2021

Обсуждаются возможности и инструменты оценки качества результатов интеллектуального анализа данных в задачах диагностического типа. Надежность (неоспариваемость) эмпирических зависимостей, формируемых в процессе обучения (интерполяции-экстраполяции) на прецедентах, оценивается средствами специального логического инструментария - характеристическими функциями. Порождение таких функций по имеющейся выборке эмпирических данных базируется на анализе сходства описаний прецедентов, уточняемого как бинарная алгебраическая операция. Представлены некоторые оценки сложности вычислений, сопутствующих применению предлагаемой математической техники характеристических функций при прогнозировании (диагностике) свойств вновь изучаемых прецедентов.
О ПРОГНОЗИРОВАНИИ ЧРЕЗВЫЧАЙНЫХ СИТУАЦИЙ, СВЯЗАННЫХ С ВЗРЫВОМ БОЕПРИПАСОВ НА СКЛАДАХ ВЗРЫВЧАТЫХ МАТЕРИАЛОВ
Authors: Седых Н.И. , Sedyh N.I.
Published: February 2021

Предложен научно-методический подход повышения точности прогнозирования чрезвычайных ситуаций, связанных с взрывом боеприпасов, разработаны предложения по снижению вероятности возгорания боеприпасов при их совместном хранении.
Penentuan Penggunaan Lahan Kosong dengan Analisis Highest and Best Use (HBU)
Authors: Mulyana Elfan Wahyu
Published: February 2021

This research aims to determine the land use with the highest and best use analysis on a vacant lot owned by Mr. Johan in Tanjungpinang City. Methodology research used by analysis of productivity of land covering aspects of the physical and legal aspects, as well as a location to obtain use of alternative possibilities. Further analysis is the analysis of the appropriateness of the market, namely supply and demand analysis of the market, as well as financial feasibility analysis for each proposed use. In this study, the data to be analyzed is composed of primary data and secondary data. Primary Data include data on income from the sale of property types and alternative expenditure proposed as an alternative to the use of, obtained by interview, while the physical data including size, shape, topography, site utilities and others obtained through direct investigation. The secondary Data were obtained from the Central Agency of statistics and several organizations in the area of Government of the city of Tanjungpinang. Based on the results of the analysis of productivity obtained three proposals for land use and housing development which allows the top, where housing as an alternative here, is the kind of simple housing, medium and luxury residential housing. Based on market analysis and financial feasibility, provided the value of the Net Present Value (NPV), the use of intermediate housing is an alternative use of the most optimal.
Analisis Faktor Perilaku Keuangan Terhadap Keputusan Investasi Emas Masyarakat Kota Batam
Authors: Budiman Johny , Jasika Jasika
Published: February 2021

The purpose of this study is to investigate the influence of behavioral factors which consisting of regret aversion, overconfidence, loss aversion, heuristics and availability bias on gold investment decisions in Batam City investor. To conduct the study, a total of 250 questionnaires were issued and distributed to the investors of gold in Batam city. To test the hypothesis, multiple linear reggression analysis is used. The results of the research showed that regret aversion has a significant and positive effect and loss aversion has a negative significant influence on gold investment decisions. While there are no significant influence of overconfidence, heuristic and availability bias to investment decisions.
Analisa Pengaruh Cost Leadership, Differentation Strategy dan Market Orientation Terhadap Kinerja Perusahaan
Authors: Purwianti Lily
Published: February 2021

The main purposes of this  study is  to analyze the relationship of cost leadership, differentiation strategy, market orientation and organization performance.  The research sample are souvenirs shop in Batam City. Multiple regression analysis to test the hypothesis. The results of this study are information about cost leadership, differentiation strategies, market orientation towards company performance. The results showed that cost leadership, differentiation strategy, market orientation has significant efect on organization performance.
The Analysis of Chitosan Granules of Polymesoda Erosa on Catfish
Authors: Ariyanti Ariyanti , Masruriati Eni , Pasha Lina Lisiana , Arlidina Dina
Published: February 2021

These abundant polymesoda erosa are only a waste for the community and have not been widely used by the community. Polymesoda erosa waste can be used because it includes local raw materials that are easily available and often found as waste for the community. The compounds contained in the shells of polymesoda erosa are chitin, calcium carbonate, calcium hydroxyapatite and calcium phosphate. This research was conducted to utilize the waste of polymesoda erosa as a granule supplement for catfish feed. The purpose of this study was to determine the most optimal concentration of chitosan waste granules from polymesoda erosa shells as catfish feed. This research is a laboratory experimental study using a completely randomized design with 5 treatments. The treatment applied was the difference in the concentration of chitosan shells from polymesoda erosa shells by 15%, 25%, and 35%, with negative control and positive control. The parameter in this study was the increase in weight of catfish. Observations were made for 1 month by feeding 3 times. To determine the existence of a comparison, a statistical test was carried out using One Way Anova test. The results showed that the optimal concentration of chitosan granules from polymesoda erosa waste was at the concentration of 35% by observing the development of fish weight.
PERANCANGAN SISTEM INFORMASI MARKETING BERBASIS WEBSITE PADA PERUSAHAAN DISTRIBUTOR PT. SBM
Authors: Hartono Sugiarto
Published: February 2021

Today, the use of the internet among the public is increasing. This gives a fairly large number in the business world specifically commercial companies. The internet makes it easier for companies to carry out sales activities, for example in marketing, sales, customer relations, or supplier relations. The objectives of the study were approved and a web application was made that made it easy for PT. SBM and other companies to promote its products to the general public. General problems at PT. SBM is limited in funds and resources for approval of a product. Therefore, we need a website that can help introduce or promote products that will be sold to the general public regardless of distance and time, as well as saving promotional costs. Data collection methods used are through surveys, interviews, and literature studies. The application design method uses the Object Oriented Analysis Diagram (OOAD) method which is divided into 2 processes, namely analysis and design. The research results consist of a web that can promote company products or individuals that are more effective and efficient. The conclusion of this research is the production of web-based e-marketing that can support companies or individuals in supporting their products.
Impacto del distanciamiento físico en la salud mental y cómo prevenirlos, revisión de la literatura.
Authors: Rodríguez Frank , Orobio Allissan , Marulanda Daniela
Published: February 2021

La pandemia del COVID-19 ha significado un enorme reto de salud pública sin precedentes; por otra parte, epidemias pasadas de influenza, SARS y MERS confirman la existencia de un vínculo entre brotes de enfermedades respiratorias y los trastornos mentales. Se identifican factores de riesgo como las medidas gubernamentales de distanciamiento físico y cuarentena, hospitalización o aislamiento domiciliario de infectados y desempeñar cargos en trabajos esenciales como el personal de la salud, las cuales pueden derivar en consecuencias como sentimientos negativos, aparición de conductas de riesgo, exacerbación de trastornos mentales existentes y, a largo plazo, aparición de nuevas condiciones psiquiátricas. Existen estudios de la actual pandemia que confirman la existencia de afectación mental en varios países, incluyendo China y Estados Unidos, lo que obliga a reevaluar el riesgo/beneficio de las medidas gubernamentales de mitigación, así como explorar nuevas alternativas, como la telemedicina, para asegurar el bienestar mental de las poblaciones vulnerables, a pesar que, al momento de esta revisión, se carece de estudios que confirmen la afección mental del COVID-19 en período post enfermedad. Como conclusión, si la actual pandemia sigue la misma dirección que epidemias anteriores, la salud mental de una gran proporción de la población será afectada, por lo cual es importante tomar en cuenta las medidas de protección que buscan disminuir el impacto negativo en la salud mental, por ejemplo, mantener actualizada a la población, proporcionar suministros adecuados y prestar especial atención a la salud mental del personal de la salud y poblaciones vulnerables.
Vólvulo de Sigmoides: Experiencia de 5 años en el Hospital Regional Rafael Hernández. David, Chiriquí. Enero 2013- Diciembre 2018.
Authors: González Cornejo Audrid , Bruno Victor
Published: February 2021

RESUMEN:

Introducción: El vólvulo de sigmoides es una causa frecuente de obstrucción intestinal en el área andina, que puede progresar a necrosis y perforación. El diagnóstico temprano, y el grado de isquemia intestinal tienen influencia directa en la morbimortalidad de los pacientes. Existe una carencia de información sobre el manejo de esta patología en nuestro país.

Métodos:  Estudio observacional, descriptivo, retrospectivo del 2013 al 2018, cuyo objetivo fue un determinar las características de los pacientes con vólvulo de sigmoides en el Hospital Regional Rafael Hernández evaluando características epidemiológicas, clínicas, exámenes complementarios, manejo y postoperatorio.

Resultados:  Se estudiaron 52 pacientes, de los cuales 63.5% fueron mayores de 60 años y 73.1% de sexo masculino. 32.7% eran de las comarcas. El tiempo de evolución fue de 1 a 3 días en un 55.8% con manifestaciones clínicas de dolor abdominal, vómitos y distención abdominal con 96.2%, 76.9% y 98.1% respectivamente. 84.6% presentaron el signo de grano de café. El manejo inicial fue endoscópico en el 53,6% y 46.2% requirieron una laparotomía de urgencias. Todos los pacientes operados se realizó resección del colon sigmoides y el 63.5% un procedimiento de Hartman. 1.9% falleció y el egreso se dió mayor a 5 días en 64.7%.

Discusión:  El vólvulo de sigmoides representa el 10.4% de las causas de obstrucción intestinal en nuestro hospital siendo más frecuente  en varones de más de 60 años y comarcas. El manejo inicial fue endoscópico, y aquellos que fueron intervenidos se realizó resección del colon sigmoides y predominó procedimiento de Hartman.
PROGRAM KHURUJ JAMAAH TABLIGH DALAM PERSPEKTIF MAQASID AL-SYARI‘AH
Authors: Nilhakim
Published: February 2021

Khuruj is one of the teachings in Jama'ah Tabligh which requires each member to go outside the area to broadcast amr al-ma`ruf nahy al-munkar within a certain time. They go out for 3 days a month, 40 days a year, and 4 months in a lifetime. The main problem is when the obligation khuruj faced with obligations in the family. Such obligations can cause problems when members of Jama'ah Tabligh can’t balance the obligation to the family in performing khuruj. On the other hand, it is very unfortunate that the lack of coordination and evaluation of care among families of members of the congregation so as to cause negative effects from the community that the tabligh worshipers less attention to families left behind. Therefore, this khuruj program should be studied with the approach of usul al-fiqh (maqasid al-syari'ah), how is khuruj allowed according to syara '. The method used in the study of the analysis conducted by looking at the benefits and harm. Based on this study, it is concluded that khuruj is a real step in the spread of Islamic syiar that not all Islamic organizations are able to implement it. However, the problem of abandoned family requires good coordination in the family, so if the members of Jamaah Tabligh do khuruj must be with the preparation of checking (family must be examined readiness related to intention, stock, physical and family to be left behind) become main and obligatory before doing khuruj so Harm can be rejected.
The Zierikzee Herbarium: contents and origins of an enigmatic 18th century herbarium
Authors: Offerhaus A. , de Haas E. , Porck H. , Kardinaal A. , Ek R. , Pokorni O. , van Andel T.
Published: February 2021

The Municipal Museum of Zierikzee (The Netherlands) houses a loose-leafed herbarium containing 354 plant specimens, of which the provenance, age and maker were until recently unknown. By studying the plant specimens, paper, decorations and labels, an image was conveyed of an early 18th
century herbarium that matched the description of a herbarium from the legacy of Jacob Ligtvoet (1684–1752), gardener in the Hortus botanicus of Leiden (The Netherlands) from 1703 till his death in 1752. This herbarium is one of the oldest garden herbaria of its kind and contains 306
unique species, of which 201 are currently native to the Netherlands. Exotic species come from the Mediterranean (81 spp.), South Africa (8), the Americas (10) and tropical Asia (7) and for the larger part from Europe and temperate Asia. Based on our comparison of names on the oldest labels,
this collection of dried plants was probably started after publication of the first garden catalogue by the prefect of the Leiden hortus and professor of botany Herman Boerhaave (1710), but before the second edition in 1720. This historic herbarium reflects the state-of-the-art of botanical
science and the international network of Dutch botanical gardens in the early 18th century.
New and recent records of hawk moths (Lepidoptera: Sphingidae) from Seychelles, with a description of a new insular subspecies
Authors: Bolotov Ivan N. , Kolosova Yulia S. , Spitsyna Elizaveta A. , Spitsyn Vitaly M.
Published: February 2021

In this study, we examine a recent sample containing two hawk moth species (Lepidoptera: Sphingidae) from Praslin and Mahé, Seychelles. It was widely accepted that the hawk moth species Temnora peckoveri (Butler, 1876) has a disjunctive range covering Madagascar and the Inner Seychelles. However, the Seychelles population of what was thought to be Temnora peckoveri shares a set of diagnostic morphological differences from both this species and T. fumosa (Walker, 1856) in the male genitalia structure. In particular, it remotely resembles Temnora fumosa based on the structure of aedeagus but differs from T. fumosa and T. peckoveri with respect to the harpe shape. Based on this evidence, we describe Temnora fumosa seychellensis Bolotov & Spitsyn ssp. nov. as a subspecies with restricted range,  being endemic to the Inner Seychelles. The range of this subspecies covers Praslin (first record), Mahé, Silhouette, La Digue, Cousine, and Denis. Additionally, we report on recent occurrences of Agrius convolvuli (Linnaeus, 1758) from Praslin (second record) and Mahé. The adult moths were recorded feeding on inflorescences of Dracaena reflexa var. angustifolia Baker (Asparagaceae) for the first time. Finally, we present a complete list of Temnora fumosa seychellensis ssp. nov. and Agrius convolvuli occurrences from Seychelles.
Specifics of Emergency Operation in Distribution Grid and their Effect on Integration and Functioning of Distributed Generation Facilities
Authors: Ilyushin P. , Kulikov A.
Published: February 2021

This paper focuses on the characteristic features of distribution grids, which have the greatest impact on the stability of generators and motor loads. It shows that severe accidents in distribution and transmission grids differ in nature, starting with an overload leading to line disconnections and further evolving into a voltage collapse. It appears that where generator capacity is commensurate with the total power of motors in a grid, the motor load has a significant impact on transients. The paper discusses how asynchronous operation is triggered, progresses, and can be addressed in a grid with distributed generation (DG) facilities. It further analyzes the consequences of deep grid sectionalization and proves why grid structure needs to be optimized for further development. The paper also shows how to take into account the specifics of emergency processes (i.e., accident-associated processes) in distribution grids when integrating and operating DG facilities.
The Influence of Fuel and Steam Consumption on Characteristics of Fixed Bed Process of Woody Biomass Steam Gasification with Intensive Heat Supply
Authors: Donskoy I.
Published: February 2021

Plant biomass is one of the most widespread renewable energy sources. Energy utilization of biomass allows solving some problems associated with the development of off-grid energy systems and the processing of combustible waste (primarily agricultural and forestry waste). This paper is devoted to the study of an allothermal gasification process of plant biomass materials using a kinetic-thermodynamic model developed by the author. The gasification process is considered stationary, and steam is used as a gasification agent. The power of the supplied heat is considered constant (10 kW). One of the significant tasks related to allothermal gasification is to choose flowrate parameters so that the heat supplied is efficiently used in chemical reactions without the threat of reactor overheating. The determination of the boundaries of the safe gasifier operation involved variant calculations with a view to optimizing the gasification conditions. The calculation results show that the allothermal gasification process can proceed with a thermochemical efficiency of about 70%. For each fixed fuel consumption level, there is an optimal fuel-steam ratio. The complete conversion of biomass requires sufficiently high temperatures. The produced gas contains a significant steam fraction
(>50 vol%) even under optimal conditions. The calculated fraction of hydrogen in dry gas is up to 60vol%. The data obtained can be used to assess the efficiency of energy units with biomass gasification using high-temperature sources, for example, in systems that use and store solar thermal energy.
Summary of the International Scientific Conference “Energy-21: Sustainable Development And Smart Management” September 7-11, 2020 Irkutsk, Russia
Authors: Voropai N. , Stennikov V.
Published: February 2021

The International Scientific Conference “energy-21: sustainable development and smart management” was held in Irkutsk, Russia, on September 7-11, 2020. The Conference was organized by the Melentiev Energy Systems Institute SB RAS with the financial support of the Russian Foundation for Basic Research (RFBR) and with the participation of the Global Energy Interconnection Development and Cooperation Organization (GEIDCO), the Forum of Gas Exporting Countries, and the Global Energy Association.
Over 170 attendees from 18 foreign and 69 Russian organizations from 8 countries (Russia, Qatar, China, Japan, Republic of Korea, Vietnam, Mongolia, Germany, Azerbaijan, and Uzbekistan) took part in the event. The participants presented more than
130 papers.
EFFECTIVENESS OF USING THE ECOSYSTEM TO
PROMOTE MULTI-PROFILE COMPANIES
Authors: Belenko O. F. , Mironchuk V. G. G.
Published: February 2021

The article discusses the experience of building a marketing communications system on the principles of an ecosystem. The advantages of this approach are revealed and an assessment of the effectiveness of using the ecosystem for promoting a holding company in the business market is given
THE ROLE OF MOTIVATION IN SPREADING THE PROCESS OF NEOINDUSTRIALIZATION AND EXPANDING THE BOUNDARIES OF HUMAN RESOURCE CONSUMPTION
Authors: Benderskaia E. A.
Published: February 2021

This article is devoted to the research of external and internal motivation of economic activity that contributes to increase the involvement of human resources in the production process in order to synthesize creative ideas and economic innovations in the era of neoindustrialization
ASSESSING THE COMPETITIVENESS OF SMALL BUSINESSES
Authors: Mazankova T. V. , Belenko O. F. , Bondarenko D. K.
Published: February 2021

Tougher competition in the consumer market necessitates maintaining the competitiveness of enterprises. In this regard, the work considers the methods of assessing competitiveness, defined the possibility of their use in the practice of small trading enterprises, made an assessment of the competitiveness of the trading enterprise PI Vasilyev A.Yu, made conclusions about ways to improve the competitiveness of the company and adjust the strategy
FEATURES OF BUSINESS VALUATION AND VALUE IN MODERN CONDITIONS
Authors: Plotkina A. R. , Monin A. A.
Published: February 2021

The paper considers the features of determining the cost and evaluating business in the new reality caused by the pandemic, highlights the main factors that affect the cost of business, and concludes that it is necessary to use various sources of analytical data to assess cash flows
CORPORATE SOCIAL RESPONSIBILITY UNDER CRISIS
Authors: Tumilevich E. N.
Published: February 2021

The article analyzes the required changes in the implemented areas of corporate social responsibility in a crisis situation. The analysis of the translated behavior of business structures during the crisis is carried out. The author formulates directions for restructuring approaches to the implementation of corporate social responsibility in the current crisis. Conclusions are drawn on the importance of creating an effective system of corporate social responsibility in times of crisis affecting the long-term development of an organization