bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimal depth of the computational pipeline for a given amount of input data
Authors: Хусаинов А.А. , Титова Е.А. 
Published: October 2021

Рассмотрен вычислительный конвейер, ступени которого могут иметь различные временные задержки, а время обмена с каналами одинаково. При заданной вероятности того, что входной элемент данных вызывает рестарт, построена аналитическая модель для расчета вероятнейшего и среднего значений времени обработки заданного числа входных элементов данных. На основании этой модели показано, что при заданных числе ступеней и тотальной логической задержке конвейер будет иметь максимальную производительность тогда и только тогда, когда задержки ступеней равны между собой. Для конвейера с одинаковыми задержками
ступеней получена поправка известной формулы Доби—Флинна для оптимальной глубины вычислительного конвейера при заданной вероятности рестарта с учетом
числа обрабатываемых элементов. Приведен пример, показывающий, что эта поправка может быть существенной. Показано, что эта формула дает оптимальную глубину на множестве всех конвейеров, включая конвейеры с различными задержками ступеней.
A computational pipeline is considered, the stages of which can have different logic delays, and the overhead clock of the channels is the same. Given the probability that the data element calls a restart, an analytical model is constructed to calculate the most probable and expected times for processing input data elements for a given amount of
input data.
Based on this model, it is shown that for a given number of stages and total logical delay, the pipeline has maximum performance if and only if the delays of the stages are equal to each other. For the pipeline with the same delays of stages, a correction is made for the well-known Duby—Flynn formula for the optimum depth of the computational pipeline with a given probability of restart, taking into account the number of elements being processed. The criterion of optimality can be the minimum most probable data processing time or the minimum value of the mathematical expectation the data processing time. An example is given showing that this correction can be significant.
It is shown that for given restart probability, total logical delay, channel exchange time and data volume, this formula gives the optimum depth on the set of all pipelines, including pipelines with different stage delays.
A method of reducing the number of operations in a fast Fourier transform algorithm
Authors: Альтман Е.А. 
Published: October 2021

Рассмотрен способ сокращения числа арифметических операций в алгоритме быстрого преобразования Фурье (БПФ). Способ основан на сокращении числа операций с поворачивающими множителями. Он применим для алгоритмов БПФ по основанию 2, использующих четырехточечные преобразования. Представлен новый алгоритм БПФ с меньшим по сравнению с ранее известными алгоритмами числом операций. Приведена реализация алгоритма на языке Python.
The purpose of this work is studying of methods to reduce the number of calculations which must be performed to calculate the fast Fourier transform (FFT). These methods optimize the well-known FFT algorithms, such as Cooley–Tukey or split-radix. The main idea of these methods is the reduction of operations due to their transfer on the graph of the algorithm through the stages of calculations This method is often used for explanation of split-radix or radix-4 algorithms. In our work, both area and distance of factor transfers are extended for 2 or more stages. Using this idea, we found two methods of cutting down the number of multiplications. In both ways, the transfer is carried out for 4 points through 2 stages of the graph. In the first method, the transfer occurs in the direction of the calculations, in the second — in the opposite direction. In both cases, the methods give a result if at the stage to
which the transfer is carried out, there are non-trivial turning factors. Applying these methods to radix-4 FFT algorithm allows reducing the number of calculations, but don’t make them less than the number of calculations in the splitradix
FFT. The record of minimal arithmetic operation for FFT algorithm was taken in applying these methods to the mixed algorithm consisting of split-radix and radix- 4 stages. This approach saves 8 operations in FFT algorithm for 256 points over the modified split-radix FFT (tangent FFT).
Exceptions modelling in imperative programs in terms of Petri nets
Authors: Леонтьев Д.В. , Одякова Д.С. , Парахин В. , Харитонов Д.И. 
Published: October 2021

Предложен подход к моделированию обработки исключительных ситуаций в императивных программах. Рассмотрены проблематика использования исключительных ситуаций в программах, общий подход к автоматическому построению моделей программ, описан минимальный набор шаблонов семантических конструкций, необходимый для построения моделей императивных программ. В качестве примера описан процесс моделирования небольшой программы и приведена ее результирующая модель в композициональном виде.
The purpose of the article is to propose an approach to the automatic generation of models of imperative programs with exceptions from the source code. Methodology. The approach defines consecutive transformations of the program beginning from the source code to the parsing tree of the program, then to an abstract semantic graph and finally to a compositional model in terms of Petri nets. Transformations are based on a set of formal principles and relations and can be performed without human intervention purely algorithmically. To build a model from the program abstract semantic graph, templates and composition rules are used. Templates describe in terms of Petri net the basic constructions of imperative programming languages: expressions, branching, loops, choice and function call. Findings. A set of templates for modelling the exception handling mechanism is described. This set includes templates for the try and catch blocks describing the processing of the exception in local places of the program, the throw operator to signal the exception, and the operator of the function call with exceptions. Оriginality/value. The article demonstrates that the proposed set of templates allows building a complete model of the program with exceptions, consisting of several functions. The resulting program model makes it possible to analyze the program behavior by standard for Petri nets formal methods. In particular, a possibility of an abnormal termination due to an exceptional situation can be validated and where each particular exception is handled as well as what exceptions are handled in a particular catch block.
On the modelling of turbulent flow over low-angle sand dunes
Authors: Потапов И.И. , Снигур К.С. , Цой Г.И. 
Published: October 2021

Предложена математическая модель задачи о движении двумерного турбулентного потока жидкости в напорном канале с волнистым дном. Математическая модель включает уравнения Рейнольдса, уравнения переноса кинетической энергии и диссипации турбулентности, приведенные к квазигидродинамическому виду. Предложен алгоритм решения задачи с помощью метода контрольных объемов и метода конечных элементов. Численно решена задача о движении турбулентного потока над неподвижными пологими песчаными дюнами. Выполнено сравнение полученных расчетов с экспериментальными данными.
Purpose. The aim of the paper is the development of mathematical models describing a turbulent river flow along gently sloping dunes and allowing estimation of the contribution of gently sloping dunes on the flow hydraulic resistance. Methodology. A quasi-hydrodynamic form of the classical RANS equations are used for describing the hydrodynamic flow. The standard k model is used for the turbulence viscosity while the equations have been transformed to the quasi-hydrodynamic form. A wall functions method is used for describing the flow near solid channel wall. Results. A new mathematical model for the problem of turbulent flow in a pressure channel with low-angle dunes is proposed. An algorithm for solving the problem is proposed. It is based on the control volume method and the finite element method. The problem of the turbulent flow over 6 fixed low-angle sand dunes is solved numerically. Numerical solutions are obtained with four different wall functions. A comparative analysis of the obtained solutions with the experimental data is carried out. Findings. It is shown that the proposed mathematical model describes the turbulent flow over low-angle dunes qualitatively and quantitatively. The solution obtained with the Volkov wall function provides the best agreement with the experiment. It is found out that the bed shear stress obtained in the near-wall computational cell by the wall functions method does not qualitatively agree with the experimental data for all considered wall functions. At the same time, the shear stress obtained in the next calculation cell agrees with the experimental data qualitatively and quantitatively. The average relative error of the shear stress obtained with the Volkov wall function is 6.84.
Rational approximation in initial boundary problems with the fronts
Authors: Идимешев С.В. 
Published: October 2021

Предложен спектральный метод на основе дробно-рациональной аппроксимации. На примере решений уравнения Бюргерса с особенностями в виде фронтов показано, что дробно-рациональное приближение решений имеет существенные преимущества перед полиномиальным. Для эффективной реализации дробно- рациональной аппроксимации в работе использована барицентрическая интерполяционная формула Лагранжа, обеспечивающая быстроту вычислений и численную устойчивость. Для адаптации узлов интерполяции использован метод, основанный на аппроксимации положения особенности аналитического продолжения решения в комплексной плоскость. Предложено обобщение метода на случай нескольких особенностей. Описано построение спектрального метода и проведены расчеты на модельных задачах, в т. ч. с двумя фронтами.
A spectral method with adaptive rational approximation is proposed. In traditional spectral polynomial interpolation, the interpolation points are fixed, usually at the roots or extrema of orthogonal polynomials. Free selection of interpolation points is impossible due to the effect described in the Runge example. The key feature of rational interpolation is the free distribution of interpolation nodes without the occurrence of the Runge phenomenon. Nevertheless, in practice it is very important to implement rational approximation effectively. Here rational approximation is implemented using the barycentric Lagrange form. This leads to fast computations and numerical stability comparable with the polynomial interpolation. It is shown that rational interpolation has significant advantages over polynomial on functions that have singularities in the form of fronts. The key idea is that rational interpolation allows adapting interpolation points according to function singularities. An effective method of grid adaptation that accounts for singularity location was used. Method was generalized to the case of several singularities, for example, for solutions with several fronts. For the solutions of the Burgers equation with singularities in the form of fronts, it is shown that rational interpolation has significant advantages over polynomial. The implementation of spectral method is described, and calculations results on model problems, including problems with two fronts, are presented.
Mística e política na experiência das mulheres
Authors: Gebara Ivone 
Published: October 2021

Minha reflexão se explicitará em quatro itens:
No primeiro tentarei delimitar o novo conceito de Mística a partir da realidade das mulheres empobrecidas; no segundo tentarei apresentar uma crítica aos modelos de mística libertária vigentes na América Latina e especialmente no Brasil; no terceiro tentarei propor uma reflexão sobre a experiência religiosa das mulheres empobrecidas e sua relação à experiência das grandes figuras bíblicas femininas e, por último, lembrarei rapidamente alguns aspectos da Mística Política do Movimento Feminista Internacional.
Liquid Smoke Fractionation from Dry Distillation of Styrofoam Board Waste to Produces Liquid Fuel
Authors: Anom I Dewa K 
Published: October 2021

Styrofoam waste is difficult to be decomposed by bacteria or microorganisms. Therefore it takes a long time to be decomposed naturally. Styrofoam waste, in general, is a big problem for the survival of living things on earth because there are quite a lot of them. So, if not handled properly can cause environmental pollution. Styrofoam waste is inorganic waste composed of polymers derived from chemicals. Additives from styrofoam are harmful to humans because they are carcinogenic. This study aims to utilize Styrofoam board waste into liquid fuel. Liquid fuel from styrofoam waste has been made successfully through dry distillation and fractionation methods. The result of fractional distillation is 42.00% liquid fuel. Based on the physical properties tests that have already been carried out, including the density test, viscosity, flash point, boiling point, calorific value, and octane number, it turns out that the liquid has characteristics close to the standard gasoline fuel. The MS spectra and the GC chromatogram show that the liquid fuel consists of a mixture of hydrocarbon compounds, namely acetone 0.23%, acetic acid 0.40%, benzene 2.82%, toluene 3.56%, heptane 1.04%, 1-octene 0.26%, butyl ester 4.92%, 2,4-dimethyl-1-heptane 0.32%, p-xylene 13%, the compound with the highest composition was styrene 73.45%.
Tamizaje de diabetes gestacional: técnica de un paso vrs. dos pasos
Authors: Cubillo Espinoza Andrea 
Published: October 2021

La diabetes gestacional es una enfermedad crónica, no transmisible, que se presenta por primera vez durante el embarazo. Es una afectación que, de no captarla tempranamente, puede tener graves efectos tanto en el feto como en la madre. Existen múltiples factores predisponentes a esta enfermedad, sobresaliendo la obesidad y la resistencia a la insulina, entre otros. Sin embargo, a lo largo de los años, se han debatido distintos métodos de detección temprana sobre la diabetes gestacional, todos con el fin de evitar complicaciones materno-fetales, las cuales han tenido y continúan teniendo un gran impacto en la salud mundial. Un alto porcentaje de mujeres con diabetes gestacional puede ser detectado tempranamente dependiendo de los criterios utilizados y su estrategia. No obstante, no existe suficiente evidencia que proporcione criterios diagnósticos tempranos de la diabetes gestacional. En este artículo se procederá a realizar una revisión bibliográfica, sobre los métodos de uno o dos pasos como tamizaje de la diabetes gestacional.
FORMAÇÃO DOCENTE E EXTENSÃO UNIVERSITÁRIA: EXPERIÊNCIAS COMPARTILHADAS POR MEIO DO PROJETO "TODA CIDADE ENSINA"
Authors: Costa Camilo , Drehmer-Marques Keiciane Canabarro , Luz Jessica Morales Oviedo da , Tolentino-Neto Luiz Caldeira Brant de 
Published: October 2021

Em consequência da pandemia do novo coronavírus, as instituições de ensino necessariamente migraram para a forma remota, decorrente disso, visando atender as pluralidades das necessidades da comunidade externa, iniciações extensionistas nos cursos de licenciaturas se tornam opções viáveis, proporcionando uma maior democratização da Ciência e tendo como foco a Alfabetização Científica. A formação docente requer iniciativas para tornar-se de maior amplitude a relação da sociedade com a Ciência, proporcionando um diálogo e uma troca de saberes que vai além dos muros da universidade. Diante do cenário exposto, o trabalho a seguir relata a experiência do desenvolvimento do projeto extensionista ‘Toda Cidade Ensina’ realizado por estudantes e professores da Educação Básica, licenciandos em Ciências Biológicas, técnicos e docentes da Universidade Federal de Santa Maria. Para o desenvolvimento do projeto, buscamos espaços não formais de educação, da região, visando potencializar didaticamente esses espaços, por meio da produção de vídeos e materiais complementares, sintetizando diferentes temas recorrentes no Ensino de Ciências. Consideramos que as ações extensionistas devem ser incorporadas e valorizadas no currículo das graduações, propiciando uma formação ampla e crítica dos educandos, além de contribuir com um diálogo permanente com a comunidade.
FIGHT AGAINST CORRUPTION AS A CONDITION FOR THE LEGAL ESTABLISHMENT OF LOCAL DEMOCRACY IN UKRAINE
Authors: Shaulskyi M. 
Published: October 2021

In the article, the author explores the problem of combating corruption in Ukraine, which affects the legal formation of local democracy, drawing attention to the direct relationship between these processes. A vicious circle has been created in Ukrainian society where corruption undermines democratic institutions, in turn, weak democratic institutions are unable to control corruption. It is obvious that an important factor in the unresolved nature of this problem is the anti-corruption strategies of recent years, which have not been able to significantly affect the current state of affairs. This article offers an analysis of anti-corruption strategies of previous years and the draft law on anti-corruption strategy for 2021-2025, which aims to prevent and eliminate corruption in Ukraine.
In turn, an effective anti-corruption fight would promote the development of the institution of local democracy, its forms such as elections, advisory bodies to the authorities, public hearings, conferences, public discussions, cooperation of public institutions and authorities at the regional and interregional level, financial participation in projects, programs and activities of the state and citizens, joint monitoring of public opinion and conducting polls, sociological research, the institute of formation of civic competencies, feedback of information exchange, etc.
Despite the long history of the development of legal mechanisms of the state aimed at overcoming corruption, there is no deep understanding in the domestic political science of the relationship between the concept of local democracy and the level of corruption. There is a noticeable lack of work that examines the relationship between corruption and the development of the institution of local democracy, which would contain an analysis of the problems of local democracy through the prism of the level of corruption and the activities of anti-corruption bodies in Ukraine. Considering the problem from this angle, we can better understand the essence of the changes that the European Ukrainian state needs.
The Genealogical Introduction to Chronicles (1 Chronicles 1-9): The Chronicler’s Purpose
Authors: Выдрин Андрей 
Published: October 2021

В статье исследуется достаточно сложный вопрос об аутентичности, предназначении и богословии обширного генеалогического введения Книг Паралипоменон (Хроник). Обсуждается социально-историческое значение генеалогий израильских колен, а также рассматриваются сходства и различия между ними и другими библейскими генеалогиями, с одной стороны, и ближневосточными и древнегреческими - с другой. Кроме того, в статье выявляется композиция генеалогического раздела Хроник, построенная по принципу хиазма, посредством которого священный автор стремился донести ключевую богословскую идею как введения, так и произведения в целом: Божественный Замысел о человечестве и творении должен осуществиться через святость народа Божия. В итоге делается вывод о том, что Летописец стремился донести до своей аудитории (иудеев позднего персидского [Ахеменидского] периода) важное сообщение: несмотря на катастрофу разрушения и Вавилонский плен, взаимоотношения Яхве со Своим народом продолжаются, и Израиль по-прежнему призван реализовать в своей жизни некогда задуманный Богом в отношении всего человечества идеал святости.
The article examines a rather complex issue of the authenticity, purpose and theology of the extensive genealogical introduction of the Chronicles. The socio-historical significance of the genealogies of the Israelite tribes is discussed, as well as the similarities and differences between them and other biblical genealogies, on the one hand, and the Middle Eastern and Ancient Greek ones, on the other. In addition, the article reveals the composition of the genealogical section of the Chronicles, built on the principle of chiasm, through which the sacred author sought to convey the key theological idea of both the introduction and the work as a whole: The Divine Plan for humanity and creation must be realized through the holiness of the people of God. As a result, it is concluded that the Chronicler sought to convey to his audience (the Jews of the late Persian [Achaemenid] period) an important message: despite the catastrophe of destruction and the Babylonian captivity, the relationship of Yahweh with His people continues, and Israel is still called to realize in its life, once conceived by God for all mankind, the ideal of holiness.
Relations Between the Russian Orthodox and Anglican Churches in the First Decade of the XX Century
Authors: Очканов Ярослав 
Published: October 2021

Статья посвящена наиболее продуктивному периоду в истории взаимосвязей между Англиканской и Русской Православной Церквами. С начала ХХ в. к межконфессиональному диалогу подключились высшие иерархи обеих Церквей, отношениями с англиканами занялась специальная Комиссия при Священном Синоде, а в Великобритании был основан Англикано-Восточно-Православный Союз. Участились взаимные визиты богословов, высших церковных и общественных деятелей обеих стран, активизировалось обсуждение вопросов возможного сближения двух Церквей на всех уровнях. Все эти действия привели к более глубокому осмыслению проблемы христианского единения, в частности, к более детальному анализу возможности воссоединения Англиканской Церкви с Православной. Были созданы условия для широкого обсуждения всего комплекса вопросов, связанных с данной проблематикой. В данной статье анализируются результаты усилий обеих Церквей по разрешению имеющихся противоречий в ходе первого десятилетия ХХ в. В дальнейшем дискуссии по поискам путей сближения были продолжены вплоть до революционных событий в России в 1917 г.
The article is devoted to the most productive period in the history of relations between the Anglican and Russian Orthodox Churches. Since the beginning of the twentieth century, when the highest hierarchs of both Churches have joined the inter-confessional dialogue, a special Commission of the Holy Synod has been engaged in relations with Anglicans, and the AnglicanEastern Orthodox Union was founded in Great Britain. Mutual visits of theologians, senior Church and public figures from both countries have become more frequent, and discussions on possible rapprochement between the two Churches at all levels have intensified. All these actions led to a deeper understanding of the problem of Christian unity, in particular to a more detailed analysis of the possibility of the reunification of the Anglican Church with the Orthodox Church. There were created conditions for a broad discussion of the entire range of questions related to this issue. This article analyzes the results of the efforts of both Churches to resolve the existing contradictions during the first decade of the twentieth century. Further discussions on the search of ways of rapprochement were continued until the revolutionary events in Russia in 1917.