bluuebunny/crossref_metadata_2025 huggingface dataset:
ФОРМУЛЫ ОЦЕНКИ ОШИБОК И ИХ АНАЛИЗ ДЛЯ CG, BI-CG И GMRES
Authors: ДЖАЙН П. , МАНГЛАНИ К. , ВЕНКАТАПАТИ М.
Published: October 2024

Современные требования к точности в измерениях и инженерных моделях увеличивают число обусловленности задач. В то время как увеличение точности чисел с плавающей запятой привело к стабильным вычислениям, увеличилась неопределенность в вопросе сходимости при использовании невязки в качестве критерия остановки. Мы представляем анализ неопределенности сходимости при использовании относительной невязки в качестве критерия остановки для итеративного решения линейных систем, а также получаемое увеличение/уменьшение вычислений при заданной допустимой погрешности. Это показывает, что оценка ошибки важна для эффективного или точного решения, даже когда число обусловленности матрицы невелико. Формула оценки ошибки Ο(1) для итераций алгоритма CG была предложена более двух десятилетий назад. Недавно формула оценки ошибки Ο(κ2) была описана для алгоритма GMRES, который допускает также несимметричные линейные системы, где κ - номер итерации. Мы предлагаем небольшую модификацию этой оценки ошибки GMRES для повышения устойчивости. В данной работе мы также предлагаем формулу оценки ошибки Ο(n) для A-нормы и l2-нормы вектора ошибки в алгоритме Bi-CG. Надежная работа этих оценок в качестве критерия остановки увеличивает экономию и точность вычислений по мере увеличения числа обусловленности и размера задач.

The demands of accuracy in measurements and engineering models today render the condition number of problems larger. While a corresponding increase in the precision of floating point numbers ensured a stable computing, the uncertainty in convergence when using residue as a stopping criterion has increased. We present an analysis of the uncertainty in convergence when using relative residue as a stopping criterion for iterative solution of linear systems, and the resulting over/under computation for a given tolerance in error. This shows that error estimation is significant for an efficient or accurate solution even when the condition number of the matrix is not large. An Ο(1) error estimator for iterations of the CG algorithm was proposed more than two decades ago. Recently, an Ο(κ2) error estimator was described for the GMRES algorithm which allows for non-symmetric linear systems as well, where κ is the iteration number. We suggest a minor modification in this GMRES error estimation for increased stability. In this work, we also propose an Ο(n) error estimator for A-norm and l2-norm of the error vector in Bi-CG algorithm. The robust performance of these estimates as a stopping criterion results in increased savings and accuracy in computation, as condition number and size of problems increase.
ДВОЙСТВЕННЫЙ МЕТОД ДЛЯ РЕШЕНИЯ ЗАДАЧИ О РАВНОВЕСИИ ТЕЛА, СОДЕРЖАЩЕГО ТОНКИЙ ДЕФЕКТ
Authors: ЖИЛЬЦОВ А.В. , МАКСИМОВА Н.Н.
Published: October 2024

Рассматривается задача о двумерном теле с тонким дефектом, свойства которого характеризуются параметром разрушения. Проводится дискретизация задачи и доказывается теорема о точности аппроксимации. Для решения задачи применяется двойственный метод, основанный на модифицированном функционале Лагранжа. В вычислительных экспериментах при решении прямой задачи используется обобщенный метод Ньютона с выбором шага, удовлетворяющего условию Армихо.

An equilibrium problem of a two-dimensional body with a thin defect whose properties are characterized by a fracture parameter is considered. The problem is discretized, and an approximation accuracy theorem is proved. To solve the problem, a dual method based on a modified Lagrange functional is used. In computational experiments, when solving the direct problem, a generalized Newton's method is used with a step satisfying Armijo's condition.
НЕТРАДИЦИОННЫЕ ИНТЕРВАЛЫ И ИХ ИСПОЛЬЗОВАНИЕ. КАКИЕ ИЗ НИХ ДЕЙСТВИТЕЛЬНО ИМЕЮТ СМЫСЛ?
Authors: ШАРЫЙ С.П.
Published: October 2024

В статье рассматривается вопрос о том, почему интервалы, являющиеся основным объектом интервального анализа, имеют именно тот вид, который мы хорошо знаем и привычно используем, а не какой-то другой. В частности, мы исследуем, почему традиционные интервалы замкнуты, т.е. содержат свои концы, а также чем плох пустой интервал. Второй вопрос, рассматриваемый в работе, заключается в том, насколько целесообразно расширять набор традиционных интервалов некоторыми другими объектами. Мы показываем, что неправильные («вывернутые») интервалы и арифметика таких интервалов (полная интервальная арифметика Каухера) очень полезны с самых различных точек зрения.

The paper discusses the question of why intervals, which are the main object of Interval Analysis, have exactly the form that we know well and habitually use, and not some other. In particular, we investigate why traditional intervals are closed, i.e. contain their endpoints, and also what is wrong with an empty interval. A second question considered in the work is how expedient it is to expand the set of traditional intervals by some other objects. We show that improper («reversed») intervals and the arithmetic of such intervals (the Kaucher complete interval arithmetic) are very useful from many different points of view.
БЕЗЫНТЕРПОЛЯЦИОННЫЙ LBM НА НЕРАВНОМЕРНЫХ СЕТКАХ
Authors: БЕРЕЗИН А.В. , ИВАНОВ А.В. , ПЕРЕПЁЛКИНА А.Ю.
Published: October 2024

Метод решёточных уравнений Больцмана (LBM) - это численная схема решения задач гидрогазодинамики. Одним из важных и развивающихся направлений LBM является корректное построение такой схемы на неравномерных пространственных решётках, которые позволяют значительно снизить общее число вычислений. Однако на текущий момент построение схемы LBM вблизи границы решёток с разным пространственным шагом неизбежно влечёт за собой необходимость интерполяции данных, что может снизить порядок аппроксимации LBM и привести к нарушению законов сохранения. В работе впервые разработан и протестирован безынтерполяционный метод построения атермического узлового LBM на неравномерных решётках с единым шагом по времени для сеток разного масштаба, основанный на двухступенчатой процедуре перекалибровки популяций, отвечающих разным шаблонам.

The lattice Boltzmann method (LBM) is a numerical scheme for solving fluid dynamics problems. One of the important and actively developing areas of LBM is correct construction of the scheme on non-uniform spatial grids. With non-uniform grids the total number of calculations can be significantly reduced. However, at the moment the construction of an LBM scheme near a boundary of grids with different spatial steps inevitably requires data interpolation, which can reduce the LBM approximation order and lead to violation of conservation laws. In this work, for the first time, we have developed and tested a method for constructing an athermal node-based LBM on non-uniform grids without interpolation, with the same time step for grids of different scales. The method is based on a two-stage transformation of populations corresponding to different on-grid stencils.
МОДЕЛИРОВАНИЕ МЕТОДОМ МОНТЕ-КАРЛО СИГНАЛА ЛАЗЕРНОЙ НАВИГАЦИОННОЙ СИСТЕМЫ
Authors: КАБЛУКОВА Е.Г. , ОШЛАКОВ В.Г. , ПРИГАРИН С.М.
Published: October 2024

Разработаны алгоритмы статистического моделирования сигнала, регистрируемого фотоприёмником лазерной навигационной системы, предназначенной для безопасной посадки воздушных судов. Методом Монте-Карло оцениваются мощность и угловые распределения излучения, регистрируемого приёмником, а также анализируется влияние рассеяния различной кратности на регистрируемый сигнал. Проведённые вычисления показывают, что предлагаемые алгоритмы позволяют оценить эффективность работы лазерной навигационной системы в различных условиях.

We have developed stochastic algorithms to simulate signals detected by a receiver of a laser navigation system designed for safe aircraft landing. Radiant flux and radiance at the receiver, as well as the contribution of radiation of different orders of scattering are estimated by a Monte Carlo method. Computation results show that the proposed algorithms allow one to study the efficiency of the laser navigation system in various conditions.
ПРИБЛИЖЁННЫЙ ИТЕРАЦИОННЫЙ АЛГОРИТМ МОДЕЛИРОВАНИЯ НЕГАУССОВСКИХ ВЕКТОРОВ С ЗАДАННЫМИ ОДНОМЕРНЫМИ РАСПРЕДЕЛЕНИЯМИ И КОВАРИАЦИОННОЙ МАТРИЦЕЙ
Authors: АКЕНТЬЕВА М.С. , КАРГАПОЛОВА Н.А. , ОГОРОДНИКОВ В.А.
Published: October 2024

В работе предложен новый итерационный метод моделирования негауссовских случайных векторов с заданными одномерными распределениями и ковариационной матрицей. Проведено сравнение предложенного алгоритма с другим итерационным алгоритмом моделирования негауссовских векторов, основанным на переупорядочивании выборки независимых случайных величин с заданными одномерными распределениями. Численные исследования показали, что алгоритмы являются фактически эквивалентными в плане точности воспроизведения заданной ковариационной матрицы при моделировании, однако предложенный алгоритм оказался более эффективным по использованию памяти и, во многих случаях, менее трудоёмким.

A new iterative method for the modeling of non-Gaussian random vectors with given marginal distributions and covariance matrix is proposed in this paper. The algorithm is compared with another iterative algorithm for the modeling of non-Gaussian vectors, which is based on reordering a sample of independent random variables with given marginal distributions. Our numerical studies show that both algorithms are equivalent in terms of the accuracy of reproducing the given covariance matrix, but the proposed algorithm turns out to be more efficient in terms of memory usage and, in many cases, is faster than the other one.
ИНВОЛЮЦИИ И КОН-ИНВОЛЮЦИИ
Authors: ИКРАМОВ Х.Д.
Published: October 2024

Дан обзор свойств сравнительно малоизвестного класса матриц, называемых кон-инволюциями, путем сопоставления их свойств со свойствами хорошо изученных инволютивных матриц или, короче, инволюций.

A review of the relatively little-known matrix class, called coninvolutions, is given. The properties of these matrices are compared with those of the well studied involutory matrices or, briefly, involutions.
К РАСЧЕТУ ТЕЧЕНИЙ ГАЗОЖИДКОСТНЫХ СМЕСЕЙ МОДИФИЦИРОВАННЫМ УЗЛОВЫМ МЕТОДОМ ХАРАКТЕРИСТИК
Authors: СУРОВ В.С.
Published: October 2024

Для расчета течений газожидкостных смесей предложен модифицированный обратный метод характеристик, в алгоритм которого введен дополнительный дробный временной шаг, что позволяет без потерь точности и устойчивости проводить вычисления с большим временным шагом. Обсуждается постановка граничных условий на криволинейных стенках применительно к многомерному узловому методу характеристик, который базируется на расщеплении вдоль координатных направлений исходной системы уравнений на ряд одномерных подсистем. Для граничных точек, расположенных на криволинейных непроницаемых поверхностях, предложен способ расчета, основанный на методике фиктивных узлов. При тестировании модифицированного метода характеристик рассчитано сверхзвуковое взаимодействие однородного дисперсного потока с преградой для режима течения с присоединенным ударным скачком. Решены задачи об установившихся течениях смеси около внешнего тупого угла, а также около конуса - аналогов течений Прандтля-Майера и Буземана в газовой динамике. Результаты вычислений сопоставлены с имеющимися автомодельными решениями и отмечено их удовлетворительное совпадение.

To calculate flows of a gas-liquid mixture, a modified inverse method of characteristics is proposed, in whose algorithm an additional fractional time step is introduced, which makes it possible to carry out calculations with a large time step without loss of accuracy and stability. A formulation of boundary conditions on curvilinear walls is discussed in relation to the multidimensional nodal method of characteristics, which is based on splitting along the coordinate directions of the original system of equations into a number of one-dimensional subsystems. For the boundary points located on curvilinear impenetrable surfaces, a calculation method based on the method of fictitious nodes is proposed. When testing the modified method, the supersonic interaction of a homogeneous dispersed flow with a barrier is calculated for a flow regime with an attached shock wave. Problems of steady mixture flows near an external obtuse angle, as well as near a cone, which are analogues of the Prandtl-Meyer and Busemann flows in gas dynamics, are solved. The calculation results are compared with available self-similar solutions, and a satisfactory agreement is reached.
Dieta cetogénica muy baja en calorías mejora función renal en paciente obeso con poliquistosis renal
Authors: García-Silva Claudia A. , Altamirano-Cortez Javier , Arellano-Salazar Martha P.
Published: October 2024

La enfermedad renal poliquística se caracteriza por quistes renales múltiples bilaterales. La obesidad exacerba el volumen renal y la disminución de la tasa de filtración glomerular en el riñón poliquístico. Las dietas cetogénicas muy bajas en calorías ofrecen resultados prometedores para la obesidad y la insuficiencia renal leve. Presentamos un paciente masculino con enfermedad renal poliquística tratado con una dieta cetogénica muy baja en calorías y analizamos los efectos de la restricción calórica y la dieta cetogénica sobre la pérdida de peso, la mejora de la tasa de filtración glomerular y la reducción del volumen renal. Las intervenciones dietéticas cetogénicas demuestran viabilidad, eficacia y seguridad para la reducción de peso y la mejora de la función renal en pacientes con enfermedad renal poliquística.
Calidad del servicio y satisfacción del cliente en una microempresa
Authors: Doza Rojas Yessica Juana
Published: October 2024

Micro-enterprises are the most numerous in the world, but they must maintain their sustainability over time, facing various factors such as globalization, competition, changes in the economy, free market, among others. To do so, microenterprises will have to manage themselves to achieve products and/or services with optimal quality and achieve the desired customer satisfaction. For this reason, this research work had the objective of determining the relationship between service quality and customer satisfaction in the food and beverage microenterprise Mimo's, Chaclacayo 2021. The approach is quantitative, basic type, non-experimental design, cross-sectional correlational, descriptive correlational level and hypothetical deductive method. The population was 213 clients, determining a sample of 67 clients. For both variables, a questionnaire was used as a data collection instrument. In order to validate the objective, Spearman's Rho statistical test was used, reaching a value of p=0.000<0.05, so the alternative hypothesis that mentions that there is a significant relationship between service quality and customer satisfaction was accepted and gave a result of Rho=0.928, which confirms a very high positive correlation. It is recommended that Mimo's Food and Beverage Microenterprise continue to conduct periodic customer surveys on service quality and customer satisfaction so that with the results obtained, its managers can make decisions to improve quality and thus increase customer satisfaction.
Holokaustas Lietuvoje: skaičių pinklėse
Authors: Jegelevičius Sigitas
Published: October 2024

Pages 156-157 missing.
Istorikai mokslinėje konferencijoje „Vilniaus Gaonas ir žydų kultūros keliai"
Authors: Jegelevičius Sigitas
Published: October 2024

-
Abbos Stražo knyga apie Ober Ostą Rec.: Strazhas Abba. Deutsche Ostpolitik im Ersten Weltkrieg: Der Fall Ober Ost, 1915-1917. Wiesbaden: Harrassowitz, 1993. 290 S.
Authors: Vyšniauskas Arūnas
Published: October 2024

-
Lithuanian - Latvian cooperation in resistance to the national oppression in the end of the 19th – beginning of the 20m cc.
Authors: Pivoras Saulius
Published: October 2024

This article outlines Lithuanian-Latvian contacts and common measures against the policy of national oppression enacted by the Russian tsar government. It is argued that a Latvian complex of senior brother was an obstacle for broadening of cooperation. More productive cooperation was achieved between Lithuanian and Lattgalian illegal book-spreaders. Lithuanian émigré organizations in Latvia were supported by Latvian organizations and common people. The idea of Lithuanian-Latvian unity was more popular than the idea of unity between the Russian Lithuanians and the Prussian Lithuanians during the 1905 revolution in Lithuania. Lithuanian-Latvian cooperation wasn't much more qualitatively developed after that.
Novgorod's Political Development in 1456-1470
Authors: Manusadžianas Tomas
Published: October 2024

This article is the first part of a work - 'Novgorod at the political cross-roads before annexation to Moscow' (1456-1478). The work deals with a situation of Novgorod's choice of political dependence between Moscow and Lithuania during the last period of Novgorod's independence.
In the article, there is presented an introductory part of the mentioned work - foreword and objectives of the work. The conception of Novgorod political development (1456-1478), 'prehistory' of the subject, and the chronological period of 1456-1470 are also discussed.
From the second half of the XIII century to the middle of the XV century, Novgorod belonged to the political system of the Vladimir Moscow Grand Duke practically without interruptions and rejected rare attempts of involvement in a Lithuanian political system.
During the period of 1456-1470, Novgorod made no attempts to leave the subordination of the Vladimir Grand Duke. Lithuania also overtly didn't try to include Novgorod in its own political system - Lithuanian dukes in Novgorod had traditional status of 'service dukes.' Conclusively, the situation of the choice of political dependence didn't take place in the period.
Influence of the Professional Values on Providing Social Work Suport
Authors: Sivreva Antoniya , Benkova Krasimira
Published: October 2024

This article aims at examining the degree of influence of the professional values with regards to activities related to providing support among social work professionals in Bulgaria.
In the survey which was conducted on a voluntary and anonymous basis, 204 social work professionals from the Stara Zagora Region took part. The WIS/SVP method – Scale for assessing professional values was applied.
Examined were the influencing factors referring to professional values and provision of social support. Found out were influencing factors between most of the professional values and the desire to provide assistance and readiness for participation in activities related to providing support. The obtained results place professional values as one of the factors determining the trend for providing assistance and participation in support activities in the field of social work in Bulgaria.
A Study on the Legal Status and Legal Subjectivity of Artificial Intelligence (AI)
Authors:   The Institute of Legal Studies, Kyunghee University, Cho Jae-Kwang , Tsche Kwang-Jun
Published: October 2024

Artificial intelligence (AI) is becoming a core technology in society, used across various industries and evolving from a tool to a creator. This paper explores how to recognize AI’s actions and incorporate it into the legal system.
First, it examines the significance and types of AI, and the requirements for recognizing AI’s legal subjectivity in Korea. AI’s legal status could be acknowledged if it develops autonomy and independent judgment, and its interactions with humans evolve to the point where it is considered a societal member.
Next, the paper reviews systems applicable to AI to harmonize AI robots with Korean legal norms. It presents grounds for recognizing AI’s legal personality from social reality and legal convenience perspectives.
Finally, it clarifies the effects and responsibility of AI’s legal actions, examining issues related to weak and strong AI responsibility, and argues for recognizing electronic personhood by reviewing the EU’s resolution on robot citizenship.
Problems of the lower soul in Plotinus: Defining its powers and its origin
Authors: Guba Ágoston
Published: October 2024

Although there is no real distinction in the soul in the metaphysics of Plotinus, discussing the activities of the individual souls, he does distinguish between higher and lower soul. Reading the Enneads, however, we face at least two major problems concerning the two kinds of soul. (i) Given that Plotinus uses the faculty psychology as well, how can we establish the border between the two kinds of soul in respect of the psychic powers? (ii) Some texts tell us that the lower soul stems from the higher soul, while others trace back to the World Soul. Does Plotinus necessarily have an inconsistent view on the lower soul's origin, or can we reconcile the two views somehow? First, I will present these two issues in more detail and their two main interpretations. Then, I am going to analyse passages of various topics, such as the emergence of desire (IV. 4 [28] 20), the possible extent of purification (I. 2 [19] 5), and the effect of magic on the soul (IV. 4 [28] 43–44). I shall argue that the crucial difference between the two kinds of soul is the ability to make free choices, which allows us to distinguish them in terms of psychic activities. On the basis of this, I intend to show that the lower soul does not originate from the World Soul strictly speaking. Instead, Plotinus uses this claim to demonstrate that certain aspects of us, including some psychic activities as well as moral character and practical life in general, cannot be under our rational control entirely, but they are subjected to the necessity of the cosmos.
“Phones off while school's on”: Evaluating problematic phone use and the social, wellbeing, and academic effects of banning phones in schools
Authors: King Daniel L. , Radunz Marcela , Galanis Christina R. , Quinney Blake , Wade Tracey
Published: October 2024

Background and aims

Mobile phone bans in secondary schools are claimed to reduce student distraction and promote learning and face-to-face socializing. Currently, the evidence on phone bans is limited. The aim of this preregistered study was to evaluate the South Australian mobile phone ban's effects on students' problematic phone use, academic engagement, school belonging, and bullying. The study also sought to identify student variables that predict phone ban compliance.

Methods

As the ban was phased in over 2023, a 2 (phone ban: yes/no) × 2 (time: baseline, 1-month follow-up) repeated-measures design was employed. Students (n = 1,282 at baseline; n = 1,256 at follow-up) in Grades 7 to 12 were recruited from five public secondary schools. Surveys included measures drawn from the Longitudinal Study of Australian Children (LSAC) and the Programme for International Student Assessment (PISA).

Results

Problematic phone use was reported by 2.6% of the sample. Being older and a more frequent user of social media predicted lower phone ban compliance. Linear mixed models indicated that ban and no ban school groups did not differ significantly in terms of problematic phone use, academic engagement, and school belonging. There was slightly higher bullying in the ban group but bullying decreased significantly in both groups.

Discussion

Imposing access restrictions may not affect the underlying psychological mechanisms that drive problematic phone use. Although these results indicate limited to no short-term benefits of the ban, further evaluation with more sensitive methodologies is recommended.

Conclusions

Student-technology interactions in learning institutions should be continually monitored to determine the optimal balance to support student etiquette, learning, and wellbeing.
The role of connected speech in distinguishing types of apraxia of speech following brain damage
Authors: Code Chris , Tree Jeremy , Müller Nicole
Published: October 2024

Research on a variety of languages has shown that tonal alignment in pitch accents can be influenced by segmental factors such as syllable structure, onset type, and phonological vowel length (e.g., Ladd et al., 2000; Maddieson, 1997). However, the majority of work on these topics has been on European languages. The current study examines the interaction of these factors in the Beirut dialect of Lebanese Arabic. Disyllabic words with initial, stressed syllables that were either open or closed and contained either a long or a short vowel and had a simple or complex onset were examined when non-focused and in contrastive focus. Contrastive focus was associated with a wider f0 range. The focus pitch accent was H* or L+H*. In terms of segmental effects, neither vowel length nor syllable structure had a significant effect on tonal alignment. Timing of the f0 peak was found to be consistently about 45 msec from vowel onset. This study contributes to the literature on tonal alignment by examining a variety of Arabic that is understudied in terms of intonation.
Effects of storage methods on the quality of Isatis indigotica radix based on active constituents and NIR spectra
Authors: Hou Jia , Guo Hongru , Du Tao , Wang Mingwei
Published: October 2024

Isatis indigotica radix is a common traditional Chinese medicine and veterinary medicine widely cultivated in China, and inappropriate storage conditions may damage its quality. The objective of this work was to investigate the changes in epigoitrin and nucleosides compounds and Near Infrared Spectra (NIR) of Isatis indigotica radix packaging under vacuum (VP), nitrogen (NP), and sealing (SP), stored at different temperatures—room temperature (SPt), refrigerator (SPr), and frozen (SPf) during 12 months of storage. After 12 months of storage, the epigoitrin concentration of I. indigotica radix samples in VP, NP, and SPt was much higher than in SPr and SPf, while samples in SPf had more contents of nucleosides than the other. Moreover, a significant difference in principal component analysis revealed a superior storage method based on active compounds and NIR spectra. It suggested that NP was considered a better storage method for retaining the chemical and physical properties and quality of I. indigotica radix after 12 months of storage.
Ruling on Theology through the Shari‘a: Modern Approaches of Qur’an Interpretation and the Classical Universal Law of God’s Transcendence
Authors: Dhuhri Saifuddin , Rijal Syamsul
Published: October 2024

The purpose of this article is to evaluate fatwa on the Wahhabite interpretation of the ambiguous verses in the Qur’an given in 2014. Classical Muslim scholars respected the intellectual freedom of the other theological schools as long as their interpretations did not attribute human characteristics to God. However, this intellectual tolerance is not demonstrated by the Ulama Council in Aceh, Indonesia today, which only accepts their interpretation of the Qur’an. Rival interpretations propagated by other ideological groups, such as the Wahhabites, are ruled as blasphemous and deserve public outcries of condemnation. It seems that the Ulama Council in Aceh has instrumentalized the Shari‘a to suppress any ideas that are not in line with the Ash‘arite creed, even though there are other legitimate schools and approaches. Any group that promotes a different view is now liable to public condemnation.
Kehinde/Dona Luisa/Luiza Mahin:Les représentations des femmes Noires brésiliennes dans Um Defeito de Cor d’Ana Maria Gonçalves
Authors: Barbosa dos Reis Roseli
Published: October 2024

La novela Um defeito de cor surge de un contexto sociocultural, político de transición y de cambio de paradigmas de la representación de los Negros/Negras, lo que nos permite destacar las posiciones de los subalternos y de los dominantes. Entre literatura e historia y por medio de archivos recuperados sobre la esclavitud, la vida del personaje de Kehinde, unamujer africana esclavizada, es narrada desde el enfoque de una escritora negra, rompiendo con el racismo, el sexismo y el clasismo de una historiografía literaria hegemónica. Este artículo problematiza la aportación de la novela a la (re)construcción social y a la representación de una nueva imagen y de una nueva identidad sociocultural de las mujeres negras brasileñas por medio de la (re)visión de un pasado “olvidado” de la cultura de origen africano a través del proceso de recuperación de la memoria de la esclavitud.
Las implicaciones de la familia por la demanda de alimentos. Los beneficios de los métodos alternativos de solución de conflictos
Authors: Arias Garzón Carmen Alicia
Published: October 2024

En Colombia, el incumplimiento del derecho a la alimentación de menores de edad (niños, niñas y adolescentes) se ha tipificado como un delito para quienes tienen la responsabilidad de cumplirlo y lo evaden. Existen muchos obstáculos en torno a este derecho que se han convertido en alicientes para el no cumplimiento, entre los cuales destacan la misma legislación existente, la educación y la pedagogía que se hace al respecto, la cultura de las personas, entre otros. El presente estudio inicia con un recorrido por la legislación colombiana sobre este derecho, a partir de la utilización del método inductivo y de una investigación de corte cualitativo soportada en la metodología hermenéutica. El estudio concluye con los siguientes elementos: El incumplimiento de las obligaciones alimentarias es considerado como un tipo específico de violencia económica; en lo cultural, las personas consideradas alimentantes solo esperan la terminación del vínculo de pareja para evadir la responsabilidad de suministrar alimento a sus hijos menores de edad.
Prácticas sostenibles de la comunidad apícola Maya, asociada a la organización Educe, México y su impacto al ODS No 2
Authors: Betancourt Rodríguez Libnazaret , Cortés Bracho Oriana , Mejía Turizo Jorge
Published: October 2024

La sustentabilidad no solo es un tema que preocupa a académicos, es una herramienta de supervivencia en el caos que hoy enfrenta cualquier país, especialmente latinoamericano. Uno de sus intereses es atender sectores vulnerables y amedrentados por prácticas capitalistas agresivas con el fin de estimular un desarrollo sustentable sostenido por su misma labor, que estimulen la producción de alimentos y favorecer el cumplimiento del ODS No 2 “hambre Cero”. Por tal razón, el presente artículo se propuso describir las acciones sustentables que lleva a cabo la organización Educe Sociedad Cooperativa (Educe S.C. en adelante) desde el punto de vista de las comunidades indígenas maya de la península de Yucatán, en México, bajo un modelo de estudio descriptivo fundamentado en la revisión de fuentes secundarias, entrevistas semi–estructurada y la observación. En este sentido, la producción de miel es una actividad complementaria del campesino, que tiene un mercado apremiante en las exportaciones, aunque se espera un crecimiento del mercado nacional; especialmente, para la miel orgánica o libre de químicos. Finalmente, Educe S.C. como organización acopiadora de miel orgánica, ofrece resultados positivos al campesino con su práctica del comercio justo y el fortalecimiento de la comunidad que desarrolla la apicultura orgánica.
Las Tics, El Nuevo Ejercicio Profesional y El Acceso a La Justicia
Authors: Fernando Orbe Arturo
Published: October 2024

Los avances tecnológicos vienen transformando toda nuestra realidad y tanto como el ejercicio profesional de la abogacía y su enseñanza no podía escapar a este nuevo escenario, pero sin dudas uno de las consecuencias más importantes en el ámbito jurídico de la pandemia declara a nivel mundial con motivo del Covid-19 fue la necesaria utilización de estas herramientas informáticas para superar el Aislamiento impuesto por cuestiones sanitarias. Pero no podemos dejar de señalar que sin una eficiente capacitación de las abogadas y abogados en las nuevas tecnologías corremos serio riesgo de obstaculizar el acceso a la justicia de la población. Este es el desafío.
Gestión educativa en Latinoamérica desde la investigación y su normativa aplicable
Authors: Miranda Medina Carlos F. , Santos Campechano Olivia , Pacheco Amigo Mabel Beatriz
Published: October 2024

Este artículo presenta los resultados de un análisis de la producción científica sobre gestión educativa en Latinoamérica publicada en revistas indexadas en la base de datos Scielo, en el periodo 2015 – 2019 así como las normas que regulan la gestión educativa en diferentes países. Para esto se realizó un estudio bibliométrico que analizó 57 artículos citables publicados en revistas indexadas en la base de datos Scielo en el periodo de 2015 a 2019, en ellos se describieron a través de los metadatos las estructuras bibliométricas y las dimensiones de la gestión educativa. Se encontró que Chile, Colombia y Brasil son países de mayor producción; la dimensión de gestión educativa más investigada es la pedagógica y la metodología más utilizada es la cualitativa. Se puede concluir que la investigación científica sobre gestión educativa se desarrolla predominantemente en los análisis teóricos, aun así, se identifican gran cantidad de estudios aplicados que evidencia la madurez metodológica que está alcanzando la temática estudiada.
Cosmic rays as an astrochemical factor
Authors:   Institute of Astronomy of the RAS, Moscow, Russia, Wiebe D. S.
Published: October 2024

At the beginning of the 20th century, people learned about a new component of matter - high-energy particles, which are accelerated by some process or processes to near-light speeds and not only pierce our Galaxy, but also wander throughout the Universe. Since these particles were originally considered a type of electromagnetic radiation, they were called cosmic rays. And although high energies seem more appropriate to physics, cosmic rays turned out to be an essential astrochemical factor. They play an important role in the thermal and ionization balance of molecular clouds, essentially initiating chemical processes in these objects, and can also stimulate the formation of organic compounds in the icy mantles of cosmic dust grains. The lecture will describe the nature of cosmic rays, their propagation in molecular clouds, and the role they play in their chemical evolution.
Algorithms for searching and identifying components of originally binary stars, tidal destroyed by SMBH
Authors:   Russian Federal Nuclear Centre, Snezhinsk, Dryomova G. N.
Published: October 2024

The genetic relationship of hypervelocity (HVS) and central (S) stars in the vicinity of a supermassive black hole (SMBH) is considered. Being at distances of the order of the Galaxy radius, in the past they could have been a binary star that experienced the tidal impact of the SMBH. It is proposed to test a two-stage algorithm for searching for genetically related in past HVS-S-pairs using catalogs [1, 2]: 1) reconstruction by the method of reverse integration of “returned” trajectory of the HVS; 2) Analysis of the coplanarity of the orbits of HVS, “returned” in SMBH-neighborhood, and the observed S-star. This task provides an independent test of our knowledge of baryonic and dark matter distribution, as well as the gravitational potential of the Galaxy based on them, which has important cosmological and evolutionary significance.
Galaxies as open systems
Authors:   Sternberg Astronomical Institute of the Lomonosov Moscow State University, Silchenko O. K.
Published: October 2024

The galaxy evolution implies permanent change of its main parameters: size, structure, chemical composition of stars, the total stellar mass... Many galaxies proceed their evolution very smoothly. What governs the evolution of galaxies? If does a single physical factor exist which determines all these characteristics? Currently astronomers think that it exists. It is a steady outer cold gas inflow, and its rate and geometry define completely the evolutionary state of a galaxy in every moment of its evolution. To find a source of this outer cold gas is a quite actual problem, unsolved yet.
On the possible origin of substructures observed in the Orion Bar PDR
Authors:   P. N. Lebedev Physical Institute, Pomelnikov I. A. ,   Samara University, Riashchikov D. S. ,   P. N. Lebedev Physical Institute,   Samara University, Molevich N. E. ,   P. N. Lebedev Physical Institute,   Samara University
Published: October 2024

In this paper, the numerical simulation of shockwave pulse evolution, which propagates in the medium with the Orion Bar photodissociation region parameters, is performed. Modelled periodical structures fit with observed substructures by the characteristic size and frequency rate.
Physical conditions in the L1287 and G268.42-0.85 cores estimated using the interpolation-accelerated Markov Chain Monte Carlo method
Authors:   A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Sorokin D. A. ,   National Research Lobachevsky State University of Nizhny Novgorod, Zemlyanukha P. M. ,   A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences, Pirogov L. E. ,   A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences
Published: October 2024

An effective method for studying the distribution of physical parameters of protostellar dense cores is to fit model spectral maps into observed ones to estimate the optimal parameters of the physical model using statistical analysis methods. The use of such methods requires significant computational time. An acceleration algorithm for the Markov chain Monte Carlo method was proposed and developed using interpolation of previously calculated model spectral maps. The algorithm is successfully applied to the estimate the physical parameters distributions in L1287 and G268.42-0.85 protostellar cores. The results are consistent with those obtained previously. The algorithm made it possible to speed up calculations by " 1 000 times.
An investigation of molecular spectra in star formation region S255IR-SMA1
Authors:   Ural Federal University, Farafontova A. A. , Salii S. V. ,   Ural Federal University
Published: October 2024

In this paper we study the spectra of the S255IR-SMA1 region observed at the IRAM30m telescope. The lines of some organic molecules were identified in the spectra using the CLASS and MADCUBA software packages. Excitation temperatures and column densities were calculated for the detected molecules. Rotational diagrams were plotted for the lines of CH3CN molecules using the obtained brightness temperatures from the CLASS program. Estimates of the rotation temperature of 63 K and the column density of the molecule that equals 1.2 X 1013 cm-؛ were obtained. In this work we show that the emission of such molecules as HNO3, CH3CN, CH3OH is excited in hot region of the core with temperatures above 300 K. Emission of molecules C2H, HNO, HNCO, HCCO is excited in colder part of the outer shell region with temperatures near 50 K.
Accuracy of age estimation methods for pairs of trans-Neptunian objects in close orbits
Authors:   Ural Federal University, Gusev V. D. , Kuznetsov E. D. ,   Ural Federal University
Published: October 2024

On the basis of the analysis of the results of numerical modeling, the study of methods for estimating the age of pairs of transneptunian objects is performed: 1) analysis of the convergence of node lines and apsidal lines, 2) analysis of the minima of the Kholshevnikov metric. We simulated the probabilistic evolution of model pairs of transneptunian objects 10 Myr old. We obtained errors in determining the ages of pairs at different orbital determination accuracies. The accuracy of determining the orbits of 11 % of known transneptunian objects is sufficient to estimate the ages of 10-15 Myr pairs with an accuracy of 2-3 Myr. The accuracy of determining the orbits of 39 % of known transneptunian objects is insufficient for obtaining reliable age estimates at the ages of 10-15 Myr pairs.
Wind modeling of LBV-candidate in NGC4736
Authors:   Special Astrophysical Observatory of RAS, Dedov E. O. , Vinokurov A. S. ,   Special Astrophysical Observatory of RAS, Kostenkov A. E. ,   Special Astrophysical Observatory of RAS, Solovyeva Y. N. ,   Special Astrophysical Observatory of RAS
Published: October 2024

We present the results of radiative transfer modeling with non-LTE CMFGEN code of recently acquired spectra of LBV-candidate J125055.8+41062 in NGC 4736 galaxy. In order to approximate the observed emission lines intensities of hydrogen, neutral helium and numerous permitted and forbidden lines of iron we created the simple spherically symmetric model of extended atmosphere as well as more complex model which combines polar and equatorial modes of mass loss. Here we discuss positive and negative sides of each model and introduce stellar fundamental parameters estimates.
Comparison of observations of sunspot magnetic fields in CrAO and AO UrFU in the 24th cycle of solar activity
Authors:   Ural Federal University, Kalinina N. D. , Kalininv A. A. ,   Ural Federal University
Published: October 2024

Observatory of the Ural Federal University (UrAO) were compared. For comparison, 2 065 simultaneously (on daily basis) observed sunspots with a magnetic field value B > 1800 G were used. The correlation coefficient was calculated both for the entire 24th cycle of solar activity, and separately for the years of the cycle. Additional studies are needed on diherence estimates of the magnitudes of magnetic fields of sunspots simultaneously observed in the OrAO and UrAO.
Theoretical study of the reaction of 1-acenaphthyl with molecular oxygen
Authors:   Samara National Research University, Kuznetsova A. A. ,   Lebedev Physical Institute, Samara Branch, Porfiriev D. P. ,   Samara National Research University,   Lebedev Physical Institute, Samara Branch
Published: October 2024

In this paper we present the results of a quantum-chemical study of the potential energy surface of the oxidation reaction of 1-acenaphthyl with molecular oxygen. The results were obtained at the G3(MP2,CC)//B3LYP/6-311G(d,p) level of theory. This approach provides chemical accuracy of relative energies and molecular parameters. Por the studied reaction pathways, the values of rate constants were calculated for various external conditions within the framework of the RRKM-ME theory with kinetic accuracy and the branching ratios of the reaction products were obtained. Analysis of the results showed that at high temperatures and low pressure the channel for losing the terminal oxygen atom O dominates, at low temperatures and pressures the channel for losing carbon monoxide CO dominates.
Estimation of the distance to a nearest neighbour on the surface of a dust grain
Authors:   Ural Federal University, Laboratory of Astrochemistry, Ostrovskii A. B. , Vasyunin A. I. ,   Ural Federal University, Laboratory of Astrochemistry
Published: October 2024

We suggest an analytical model for estimation of the distance to a nearest neighbour on a surface of a spherical dust grain. Comparison with Monte-Carlo simulation are presented.
Temperature and position control of spectrographs in Nasmyth-2 focus BTA
Authors:   Special Astrophysical Observatory RAS, Panchuk V. E. , Yushkin M. V. ,   Special Astrophysical Observatory RAS, Emelianov E. V. ,   Special Astrophysical Observatory RAS, Zhuklevich G. S. ,   Special Astrophysical Observatory RAS
Published: October 2024

In order to study the instability of the spectrograph, temperature and positional monitoring of the quartz echelle spectrograph NES, located on the Nasmyth-2 focus platform of the 6- meter BTA telescope, was carried out. Over the course of just over two days, three series of exposures of the comparison spectrum lamp were obtained. In each series of exposures, the spectrum of the comparison lamp was recorded at intervals of 15 minutes and the readings of temperature sensors installed on the periphery of the NES were recorded. A correlation analysis of the obtained data was carried out. Based on the totality of the results, it was concluded that the main reason for the instability of the NES spectrograph is the thermal deformation of the pre-slit part.
Determination of convex profile from asteroid light curve
Authors:   Institute of Applied Astronomy of the Russian Academy of Sciences, Tolstoy A. L. , Medvedev Yu. D. ,   Institute of Applied Astronomy of the Russian Academy of Sciences
Published: October 2024

The light curve of a rotated asteroid is determined by its shape, surface light scattering characteristics, and position. To determine the profile of the body the method of light curve inversion, which is based on Fourier transform is usually used. In this method, the number of parameters characterising the profile is limited by the number of Fourier harmonics. In present paper, we propose a method in which the body profile is represented by a convex closed polygonal chain and the normal vectors to each segment. The applying our method makes us be able to use the more complicated models of light reflection. Profiles of several asteroids was obtained using proposed method.
Effects of PGPB Inoculations on Plant Growth and Quality of Spray Carnation Cultivation in Greenhouse
Authors: Yıldız Taşkesen Esra , Çığ Arzu , Türkoğlu Nalan
Published: October 2024

This study was carried out to reveal the effects of beneficial bacteria on the development and quality of Dianthus caryophyllus under greenhouse conditions. The carnation seedlings were treated with Enterobacter ludwigii (KF29A) and Pseudomonas fluorescens (KF31B), which have nitrogen fixation, phosphate solibilizing and siderophore production properties, Paenarthrobacter nitroguaiacolicus (KF3B) with nitrogen fixation, ACC deaminase and siderophore production, Pseudomonas sp. strain VG242B (KF5A), which carries nitrogen fixing, phosphate solibilizing, and siderophore production properties together, Paenibacillus xylanilyticus (KF63C) with nitrogen fixation, phosphate solibilizing, ACC deaminase and siderophore production properties together and Pseudoalteromonas tetraodonis (TV126C) bacteria with nitrogen fixing, phosphate solibilizing and ACC deaminase properties were applied. In the study, in which phenological and morphological observations were made, the effects of bacterial inoculations were tried to be determined.
The effects of beneficial bacteria treatments on the number of petals, the number of nodes, the length between the nodes and the weight of the branches in the carnation plant were statistically insignificant; effects on the parameters of bud first bloom time, full bloom time, time from planting to first harvest, number of flower buds and stem length (p
Agricultural Output and Economic Growth Nexus: A VECM Approach on Bangladesh
Authors: Pervez Masud , Ahmed Zobayer , Uddin Muhammad Salah , Mizanur Rahman Mohammad
Published: October 2024

Agriculture is the engine of an economy. In Bangladesh, 50% of the entire laborer force is employed in farming, and around 87% of rural families depend on agriculture for any part of their wages. Considering the importance of the agriculture sector in Bangladesh, the study examines the nexus between agricultural output and economic growth. In the finding of this causality, the VECM test has been applied and found the long-run relationship between variables where the rate of restoring the disequilibrium into equilibrium is 66.4%. The research applies the impulse response function and variance decomposition where in both cases, the result implies that the agricultural output is much more significant on economic growth than industrial output, meaning that to be a sustainable economy, the agriculture sector cannot be ignored. The study also provides insights to the policymakers that the agriculture sector should be given much more priority in terms of budget, and the academician should do more research to develop sustainable agro-based products.