bluuebunny/crossref_metadata_2025 huggingface dataset:
Analyzing the Financial Performance of Manufacturing Firms: A Focus on Return on Equity, Return on Assets and Return on Sales
Authors: Sam Bazimya  , Dr. Siegfried M. Erorita
Published: October 2024

The research aims to delve into the financial performance of manufacturing firms, with a specific focus on key financial indicators such as Return on Equity (ROE), Return on Assets (ROA), and Return on Sales (ROS). These indicators are commonly used to assess a company's profitability, efficiency, and overall financial health. The study involved the analysis of the financial statements of selected manufacturing firms to compare and evaluate their performance based on these metrics. Return on Equity (ROE) measures a company's profitability relative to the equity of its shareholders. Return on Assets (ROA) indicates how efficiently a company is using its assets to generate earnings. Return on Sales (ROS) measures a company's ability to generate profits from its revenue. The research aims to provide valuable insights into the financial health and efficiency of manufacturing companies. The findings may have implications for various stakeholders, including investors, industry practitioners, and the companies themselves. Investors can use the insights to make informed decisions about their investment choices, while industry practitioners can gain valuable knowledge about improving financial performance. Additionally, Rwandan companies themselves can use the findings to identify areas for potential improvement in their financial management and operations.
Relationship between Self-Esteem and Academic Performance of Hearing-Impaired Students at Kuja School for the Deaf, Rongo Sub-County, Migori County, Kenya
Authors: Christine Ndunge Musyoki  , Dr. John Agwaya Aomo
Published: October 2024

Conducted in Kuja School for the Deaf, Rongo Sub-County, Migori County, the research investigated if there existed a relationship in academic performance between students with different levels of self-esteem. Study objectives sought to assess the levels of self-esteem, the academic performance of students with high or low self-esteem and how hearing-impaired students cope as they protect and enhance their self-esteem. Hierarchy of Needs theory propounded by Abraham Maslow guided the study. The theory states that individuals will strive to satisfy higher-level needs when lower needs in the hierarchy are fulfilled. The study also used Person-centred theory by Carl Rogers; this theory posits that a child will attain self-understanding when they accept the self and reality. This study was descriptive in nature and utilized a quantitative approach to collecting data with the use of a mixed questionnaire. The study used Rosenberg's self–esteem assessment tool for the measurement of self-esteem levels, academic performance was measured using examination scores, and coping mechanisms were measured using a Likert scale. Students and administrators of Kuja School for the Deaf made the target population for this study. In total, 290 participants were targeted, and 98 participants were sampled to participate in the study using purposive and simple random sampling. Quantitative data was organized and then analyzed using SPSS version 23; the data was displayed through tables, charts and frequency distributions. From the study, it was deciphered that a majority (77.08%) of the students exhibited high self-esteem, while a few (22.92%) portrayed low self-esteem. The findings also showed that the mean difference between hearing-impaired students showing low self-esteem and students who showed high self-esteem was not statistically significant. The findings further revealed that the students sometimes or often employ various coping strategies, including withdrawal and bicultural skills. This study, therefore, concluded that students with hearing impairment mostly exhibit high self-esteem, and their academic performance is not necessarily determined by self-esteem levels. Further, the study concluded that there are coping strategies that enable students with hearing impairment to protect their personal self-esteem. On the basis of these findings, this study suggests that teachers and administrators of schools for the hearing impaired should seek to understand the needs and challenges of their students, which could be affecting their academic performance and adopt strategies to address them.
Los criterios sujetos a juicio de valor. El caballo de Troya de la contratación pública
Authors: Segura Martínez Antonio
Published: October 2024

Objetivos: este artículo lleva a cabo una reflexión sobre el alcance actual de los criterios sujetos a juicio de valor en nuestro marco público de contratación, para lo cual analizaremos los diferentes aspectos que envuelven a los criterios subjetivos. Metodología: la habitual en los estudios jurídicos, con manejo del derecho positivo, la doctrina científica, las resoluciones de los tribunales de recursos contractuales y la jurisprudencia. Resultados: la raquítica y desarmonizada regulación que de los mismos realiza la actual ley de contratos, convierte a los criterios sujetos a juicio de valor, con más asiduidad de la deseada, en un artefacto jurídico maleable y arbitrario. Conclusiones: inferimos la necesidad de acometer un proceso de reforma de los criterios sujetos a juicio de valor que, sin implicar un cambio disruptivo que comprometa la esencia de los mismos, permita una mejora normativa que garantice un adecuado equilibrio entre su utilización con un terreno de juego marcado y abonado por la certidumbre en el que deben desenvolverse todos los operadores económicos, dando lugar a la configuración de un marco jurídico claro y seguro.
Opioid-Free Analgesia in Anterior Cervical Spine Surgery: An Evidence-Based Protocol
Authors: BP Segebarth
Published: October 2024

Opioid misuse, abuse, and fatal overdoses remain an on-going public health crisis and economic burden in the United States. It has previously been shown that consumption of legally-prescribed opioids is one of the strongest risk factors for developing opioid addiction and the most common risk factor for later illicit opioid use.
Reconceptualizing Corruption as an International Crime: A Review of International Law
Authors: Wicaksana Prakasa Satria Unggul
Published: October 2024

The discourse surrounding corruption as an international crime is increasingly urgent, as it transcends national borders and contributes to economic crises, conflicts, and various crimes that threaten global security. Scholars such as Christensen (2017), Peters (2018), Davis (2018), and Rothe (2010) have linked corruption to human rights violations, revealing that states often struggle to address it effectively. This research seeks to explore how corruption can be redefined as an international crime and what legal accountability mechanisms exist for perpetrators within international law, while also examining the opportunities for the international community to recognize corruption as an international crime. The findings suggest that corruption crimes impacting security, human rights, and environmental integrity, particularly in contexts where states are unable or unwilling to act, should be classified as international crimes, necessitating a global commitment to amend the United Nations Convention Against Corruption (UNCAC) accordingly. Furthermore, the potential for universal jurisdiction over corruption is explored, whether through amending the 1998 Rome Statute or establishing an ad hoc international tribunal, although significant obstacles remain due to states’ commitments to their sovereignty and criminal jurisdiction.
Formulation and Activity of Sunscreen Cream from Ethanol Extract of Calendula officinalis L Flowers
Authors: Rohmani Sholichah , Mar’atushsholihah Luthfia , Darojati Ulfa Afrinurfadhillah , Meitasari Annisa Diyan , Susanto Bela Novita Amaris
Published: October 2024

Sunscreen made of natural ingredients is an alternative to protect the skin from excess UV radiation and a substitute for chemical products that have side effects. It was reported that Calendula officinalis L. has flavonoid and saponin metabolite compounds which function as photoprotective agents. This research aims to formulate sunscreen cream and examine the effect of variations in Calendula officinalis L flower extract (5%;7%;10% w/v) on physicochemical properties, stability, and values of the Sun Protecting Factor (SPF) in vitro using UV-Vis spectrophotometry and in vivo using wistar line rat test animals to see the time of formation of Minimum Erythema Dose (MED). It has been proven that variations in the concentration of Calendula officinalis L. extract affected the physicochemical properties, such as pH value, viscosity, spreadability, and adhesion strength. However, the overall results of the physicochemical properties still met the requirements. Variations in extract concentration affected the SPF value. In vitro SPF test showed the minimum protection category for F1, extra protection for F2, maximum protection for F3, and no protection for F0. Meanwhile, the in vivo SPF test showed the minimal protection category for F1, medium protection for F2, extra protection for F3, and no protection for F0.
Integrating Computational Methods into Antibacterial Drug Discovery and Development from Natural Products
Authors: Yuliandra Yori , Syafni Nova
Published: October 2024

Natural products have long been pivotal in sustaining civilizations due to their medicinal properties and have served as a rich source of bioactive compounds for drug discovery. With the rise of antibiotic-resistant bacteria, there is an urgent need for new antibacterial agents. Natural products, with their diverse chemical structures, provide a promising reservoir for identifying new lead compounds. Historically, the discovery of bioactive natural products often relied on serendipity, but modern advancements in computational approaches, particularly computer-aided drug design (CADD), have revolutionized this process. In the modern era, vast data from advanced technologies can provide valuable insights through computational methods. These approaches enable the structural analysis of molecules and the prediction of their biological activities, accelerating drug discovery. Advances in molecular sciences have identified more antibacterial targets, further facilitating this process. Integrating computational drug design with the study of natural products allows for the efficient identification and optimization of potential antibacterial agents. Moreover, many medicinal plants harbor mechanisms of action that remain unexplored by conventional methods. By employing computational techniques, researchers can uncover these mechanisms and develop novel antibacterial drugs. This combined approach not only enhances our understanding of natural products but also addresses the critical need for new treatments in the fight against bacterial infections.
PENERAPAN APLIKASI ACCURATE DALAM PENYUSUNAN LAPORAN KEUANGAN BERDASARKAN SAK EMKM (studi kasus rumah sakit Elim Rantepao)
Authors: Padaunan Ary , Palinggi Cecilia Raysianna , Rubak Manurun Godbless , Tiara Tiara , Situru Yosinta , Putri Danduru Beatrix
Published: October 2024

Tujuan dari penelitian ini adalah untuk membandingkan pencatatan keuangan secara manual menggunakan excel dan menggunakan aplikasi accurate yang lebih akurat dan lebih baik dalam hal pencatatan data. Penelitian dilakukan di rumah sakit Elim Rantepao dengan menggunakan pendekatan deskriptif-kualitatif, penelitian ini menjelaskan semua hal yang berkaitan dengan peran aplikasi accurate dalam penyusunan laporan keuangan rumah sakit Elim Rantepao, dan hasilnya menunjukkan bahwa penggunaan aplikasi accurate memang membantu mereka dalam memasukkan data keuangan dibandingkan secara manual menggunakan Excel.
PENGARUH KOMPLEKSITAS SISTEM PERPAJAKAN TERHADAP KEPATUHAN WAJIB PAJAK ORANG PRIBADI DENGAN GENDER SEBAGAI VARIABEL MODERASI
Authors: Ramadhani Endrasti Nadya , Prastiwi Dewi
Published: October 2024

Kepatuhan merupakan kunci sukses pemungutan pajak, oleh karena itu perlu dilakukan identifikasi faktor-faktor yang mempengaruhi kepatuhan wajib pajak. Berbagai penelitian telah dilakukan guna membuktikan variabel-variabel yang berpengaruh terhadap kepatuhan wajib pajak. Penelitian ini  bertujuan membuktikan pengaruh kompleksitas sistem perpajakan terhadap kepatuhan Wajib Pajak dengan gender sebagai variabel moderasi. Variabel ini dipilih karena dengan system digitalisasi saat ini semua administrasi perpajakan dilakukan secara digital. Penelitian ini menggunakan dua teori yaitu teori Atribusi dan Teori Feminisme. Data dikumpulkan menggunakan kuisioner dengan jumlah sampel sebanyak 400 responden Wajib Pajak Orang Pribadi di 10 KPP Surabaya yang terdaftar pada Kantor Wilayah DJP Jawa Timur I. Penelitian ini menggunakankan enam jenis karakteristik sampel sebagai bahan analisa hipotesa. Aplikasi statistik SmartPLS digunakan untuk pengelolaan data dalam penelitian ini. Hasil penelitian membuktikan kompleksitas sistem perpajakan berpengaruh positif terhadap kepatuhan wajib pajak, sedangkan gender tidak dapat memoderasi hubungan komplesitas sistem perpajakan terhadap kepatuhan pajak.
PENGARUH PENERAPAN GREEN ACCOUNTING DAN CORPORATE SOCIAL RESPONSIBILITY TERHADAP PROFITABILITAS PERUSAHAAN DENGAN CITRA PERUSAHAAN SEBAGAI VARIABEL MODERATING
Authors: Soedarman Mohamad Soedarman , Abigail Fenina  , Lailatus Sa’adah
Published: October 2024

This study aims to analyze the influence between green accounting and Corporate Social Responsibility variables on company profitability and the effect between green accounting and Corporate Social Responsibility which is moderated by corporate image on company profitability. The results of this study are expected to be able to contribute to company management in applying these two concepts as an effort to maximize profitability and corporate image. This research method uses a quantitative causality approach. The sampling technique used purposive sampling and obtained a sample of 16 food and beverage companies. Data processing uses SmartPLS 4. The results of this study show that green accounting has a negative and not significant effect on profitability, Corporate Social Responsibility has a negative and significant effect on company profitability, green accounting has a negative and significant effect on company profitability through corporate image, and Corporate Social Responsibility has a positive effect and not significant to company profitability through corporate image.
PENGARUH TAX SELF-ASSESSMENT SYSTEM, MONEY ETHICS, DAN RELIGIUSITAS TERHADAP TAX EVASION
Authors: Whittleliang Hakki Tandry , Simanungkalit Jobrinson , Siat Mung
Published: October 2024

Penggelapan pajak merupakan tindakan wajib pajak yang selalu berusaha untuk meminimalkan beban pajak terutang dengan melanggar ketentuan perundang-undangan perpajakan. Penelitian ini bertujuan untuk menganalisa dan membuktikan secara empiris pengaruh Tax Self Assessment System, Money Ethics dan Religiusitas terhadap Persepsi Tax Evasion. Metode analisis yang digunakan dalam penelitian ini adalah analisis regresi berganda. Respondennya adalah Usaha Mikro, Kecil, dan Menengah (UMKM): (1) Tax Self Assessment System berpengaruh  signifikan dan positif terhadap Tax Evasion; (2) Etika Uang tidak berpengaurh signifikan terhadap Tax Evasion; (3) Religiusitas berpengaruh signifikan terhadap Tax Evasion. Objek Penelitian yang akan diteliti adalah wajib pajak yang memiliki NPWP dan bekerja di perusahaan yang berada di Jakarta dan Bandung. Teknik sampling yang digunakan dalam penelitian ini adalah purposive sampling. Teknik pengumpulan data yang digunakan bersumber dari kuesioner dengan jumlah responden sebanyak 180 responden dengan pengembalian kuesioner yang sudah diisi lengkap oleh responden adalah sebanyak 135 kuesioner. Jenis penelitian yang digunakan adalah penelitian yang bersifat kuantitatif dengan menggunakan skala likert dan metode analisis data yang digunakan adalah uji regresi linear berganda dengan menggunakan SPSS 25. Hasil penelitian menunjukkan bahwa Tax Self Assessment system dan religiusitas berpengaruh signifikan terhadap persepsi tax evasion, tetapi money ethics tidak berpengaruh signifikan terhadap persepsi tax evasion.
Теоретичні положення забезпечення конкурентоспроможності банківських установ в Україні в умовах становлення цифрової економіки
Authors:   Національний університет «Чернігівська політехніка», Мурашковська Ірина , Гречка Владислав ,   Національний університет «Чернігівська політехніка», Островський В’ячеслав ,   Національний університет «Чернігівська політехніка»
Published: October 2024

У статті розкриті проблеми конкурентоспроможності банківських установ в умовах трансформаційних цифрових процесів в Україні. Теоретично обґрунтовано застосування спеціалізованих фінансових програмних для підвищення конкурентоспроможності банківських установ в умовах розвитку цифрової економіки та питання посилення гнучкості банківських установ при цифровізації. Запропоновано вирішення ряду проблем пов’язаних із інтеграцією у світову фінансову спільноту, формування транскордонних потоків фінансових даних. Відображені характерні особливості цифрової економіки з точку зору конкурентоспроможності банківських установ. Структуровані основні види банківських операцій, що мають значний потенціал розвитку в Україні. Наведена структурована характеристика банківських установ за рівнем цифрової трансформації. Проаналізована трансформація стратегічних пріоритетів розвитку фінансових технологій банківських установ в Україні. Проаналізовані причини, що спонукатимуть цифрові фінанси стати ключовим драйвером економічного зростання державного банківського цифрового ринку.
Encouraging New Moms to Move More—Are We Missing the Mark? A Systematic Review With Meta-Analysis of the Effect of Exercise Interventions on Postpartum Physical Activity Levels and Cardiorespiratory Fitness
Authors: Schulz Jenna M. , Marmura Hana , Hewitt Chloe M. , Parkinson Laura J. , Thornton Jane S.
Published: October 2024

OBJECTIVE: To determine if current exercise interventions were effective at improving physical activity (PA) levels and/or cardiorespiratory fitness (CRF) in postpartum women.

DESIGN: Intervention systematic review with meta-analysis.

LITERATURE SEARCH: CINAHL, Embase, Medline, PsycINFO, and SPORTDiscus were searched from inception to March 2024.

STUDY SELECTION CRITERIA: Participants: postpartum women; intervention: exercise; control: standard care; outcomes: PA levels and/or CRF.

DATA SYNTHESIS: Random effects meta-analysis using standardized mean differences (SMDs). Risk of bias was assessed using the Cochrane Risk of Bias 2 (RoB 2) and Risk of Bias in Non-Randomized Studies – Intervention (ROBINS-I).

RESULTS: A total of 6041 studies were screened, and 29 were eligible for inclusion. Nineteen studies with adequate control data included outcomes related to PA levels (n = 12) or CRF (n = 7) and were pooled in meta-analyses. There was a small to moderate improvement in CRF (SMD, 0.65; 95% CI [confidence interval]: 0.20, 1.10; I2 = 61%). There was no improvement in PA levels (SMD, −0.13; 95% CI: −0.53, 0.26; I2 = 90%). Frequency, intensity, type, and time of the exercise interventions varied. Twenty-three studies were at high or serious risk of bias.

CONCLUSIONS: Postpartum exercise interventions may improve CRF but have an unclear effect on PA levels. Despite numerous exercise interventions to improve health outcomes postpartum, parameters were inconsistent. J Orthop Sports Phys Ther 2024;54(11):687-701. Epub 9 October 2024. doi:10.2519/jospt.2024.12666
RESPONSE OF TWO MUSKMELON HYBRID TO SEAWEED AND LICORICE ROOT EXTRACT FOLIAR FERTILIZERS
Authors: Ahmed Ahmed M.T , Saeid Abduljabbar I.
Published: October 2024

A field experiment was conducted at Malta Dohuk government research farm in Dohuk province to investigate the impact of licorice root extract at three concentrations (0, 8, and 16 g.L-1) and Maxi Grow at three concentrations (0, 5, and 10 ml.L-1) on two muskmelon hybrids (ES 3111 F1 and ES 335 F1). Both hybrids received foliar sprays, and their combined effects on the growth and yield of the hybrids were examined. The experiment adhered to a randomized complete block design (RCBD) with three replicates. The results demonstrated that the influence of the muskmelon hybrids on growth and yield was not significant, except for Total Soluble Solids (TSS), which was higher in the hybrid ES 3111 F1 compared to ES 335 F1. In contrast, Maxi Grow at (10) ml.L-1 exhibited significant positive effects on all studied traits compared to the control group. Similarly, foliar application of licorice root extract at 16 g.L-1 significantly enhanced vegetative growth parameters (number of leaves per plant, number of branches per plant, with no effect on chlorophyll content), as well as stem diameter and yield-related traits such as the number and weight of fruits per plant. Notably, the combined interaction of licorice root extract at 16 g.L-1 and Maxi Grow at 10 ml.L-1 had the most favorable impact on the studied characters, particularly when applied to the ES 335 F1 hybrid. The results suggest that the use of licorice root extract and Maxi Grow is recommended for the organic production of the ES 335 F1 hybrid.
Lehrwunder : MR-Anwendungen für den Unterricht
Authors:   Technische Universität Dresden, Franke Ingmar S. , Groschopp Paulina ,   TVG – Technische Visualistik GmbH, Steinmann Christian ,   domeprojection.com GmbH
Published: October 2024

As part of the project 'Lehrwunder - Intelligenter digitaler Baukasten für kreativeren Unterricht in Schulen mittels innovativer Medienproduktionen' (Lehrwunder for short), three different scenarios for possible use in secondary school lessons were developed for the mixed reality projection system 'Virtual Reality Learning Space' (VRLS for short), which is based on projection mapping. The results include an application for geography lessons to project map material on the subject of climate change onto a hemisphere. In addition, an interactive quiz application was developed that can be transferred to different subject areas and can be edited manually by teachers. The third scenario visualizes the outside and inside of an animal cell and is designed to help pupils of different grades learn the most important cell organelles. The last two applications in particular are proving to be promising for later use in the classroom due to the possibilities for interaction. In addition, a concept for a future setup was developed. Three comparative designs were produced for further product development.
KI-Bildgeneratoren im Handwerk – Entwicklung neuer Kommunikations- und Entwurfsprozesse in der Praxis
Authors:   Beraterin für Innovation und Technologie / Design Handwerkskammer Dresden, Goldammer Anne
Published: October 2024

Mit der Teilnahme an der EEE2024-Tagung gibt die Abteilung Innovation und Technologie der Handwerkskammer Dresden zum Thema Integration von KI-Tools im Entwurf im Handwerk einen praktischen Einblick in die Zusammenarbeit mit Handwerksbetrieben, angehenden Meister:innen und Ausbilder:innen im Handwerk. Es werden handwerksrelevante Designmethoden unter Nutzung von KI-Tools vorgestellt und so eine mittel- und längerfristige Perspektive der handwerklichen Entwurfsarbeit in Hinblick auf die Themen Individualisierung, Entwurf und Beratung vorgestellt.
РАЗРАБОТКА МЕТОДИКИ ОПРЕДЕЛЕНИЯ ДОСТАТОЧНОСТИ ВЫПОЛНЕННЫХ РАБОТ ПО ЛИКВИДАЦИИ (КОНСЕРВАЦИИ) ОПАСНОГО ПРОИЗВОДСТВЕННОГО ОБЪЕКТА - ШАХТЫ УГОЛЬНОЙ
Authors: Ботвенко Д.В. , Кочуев Г.В.
Published: October 2024

В статье представлена методика оценки выполненных работ по ликвидации (консервации) опасного производственного объекта, разработанная АО «НЦ ВостНИИ» и применяемая в отношении угольных шахт Кузбасса. Перечислены обязательные процедуры, которые необходимо выполнить в процессе ликвидации (консервации) опасных производственных объектов. Отмечено, в каких случаях исключение объекта из государственного реестра производится на основании заявления эксплуатирующих его организации или индивидуального предпринимателя на бумажном носителе или в форме электронного документа, подписанного усиленной квалифицированной подписью, федеральным органом исполнительной власти или Государственной корпорацией по атомной энергии «Росатом», а в каких - федеральным органом исполнительной власти или Государственной корпорацией по атомной энергии «Росатом» по результатам проведения мероприятий по контролю в отношении соответствующего объекта. Представлена блок-схема алгоритма выполнения работ по определению достаточности мероприятий по ликвидации опасных производственных объектов.

The methodology of the performed work assessment oт the abandonment (mothballing) of a hazardous production facility, developed by JSC «NC VostNII» and applied to the coal mines of Kuzbass, is presented in the article. The mandatory procedures that must be performed during the abandonment (mothballing) process of hazardous production facilities are listed. It is noted in which cases an object is excluded from the state register on the basis of the statement issued by an organization or a self-employed entrepreneur. The statement can be paper-based or in electronic document form, signed by the qualified signature, federal executive body, Rosatom State Nuclear Energy Corporation or by the federal executive authority or the State Atomic Energy Corporation «Rosatom» based on the results of control measures in the relation of the relevant facility. The algorithm flowchart for the performing work of determination of the measures adequacy for abandonment hazardous production facilities is presented.
ИССЛЕДОВАНИЕ ВЗРЫВЧАТОСТИ УГОЛЬНОЙ ПЫЛИ РАЗЛИЧНОГО ДИСПЕРСНОГО СОСТАВА
Authors: Сазонов М.С. , Голоскоков С.И.
Published: October 2024

Представлены исследования взрывчатости угольной пыли, проводимые в НЦ ВостНИИ. Целью работы является повышение уровня пылевзрывобезопасности технологических процессов. Испытания проводились в 4,25-литровой испытательной камере. Проведен анализ измеряемых показателей: нижнего концентрационного предела распространения пламени, максимального давления взрыва, максимальной скорости нарастания давления взрыва, индекса пожаровзрывоопасности, времени индукции пыли, времени горения пыли, добавки инертной пыли, модальной величины распределения частиц угля.

Studies of the coal dust explosiveness conducted in the JSC «NC VostNII» are presented. The aim of the work is to increase the level of safety of works connected with coal dust. The tests were carried out in the 4.25-liter test chamber. The measurable indicators were analyzed: lower explosive limit, maximum explosion pressure, maximum rate of explosion pressure rise, fire and explosion hazard index, dust induction time, dust combustion time, the addition of preventive dust, modal value of coal particle distribution.
СОЗДАНИЕ ЦИФРОВОЙ МОДЕЛИ МАССИВА ГОРНЫХ ПОРОД И РЕЗУЛЬТАТЫ ЕЕ ИСПОЛЬЗОВАНИЯ ДЛЯ РЕШЕНИЯ ЗАДАЧ
Authors: Игнатов Ю.М. , Гагарин А.А. , Мякишева Л.Е.
Published: October 2024

На горнодобывающих предприятиях цифровой маркшейдерский план горных выработок создается, пополняется и используется в электронном виде и распечатывается для создания бумажных копий. Для автоматизированного решения геолого-маркшейдерских задач необходимо дополнять цифровые планы цифровыми моделями массива горных пород в соответствии с требованиями геоинформационного моделирования . В статье приведен разработанный метод создания цифровой модели массива горных пород для интегрированной геоинформационной среды. В методе используется математический аппарат теории распознавания образов и способы обработки данных пакетами программ ГИС и прикладными модулями. Данный метод является частью разрабатываемой методики формирования геолого-прогнозной модели объекта на основе прогнозно-поисковых признаков, содержащихся в банке моделей эталонных объектов. Метод позволяет находить на плане аномальные зоны, делить площадь пласта на однородные участки по геологическим условиям и определять значения показателя в точке плана. Приведены требования к создаваемой базе данных с цифровым описанием геополей с использованием средств ГИС. Приведены результаты применения разработанного метода прогнозирования горно-геологических условий.

At mining enterprises, the digital mine surveyor plan (DSM) of mine workings is created, replenished and used in electronic and paper forms. For the of geological surveying tasks automated solution, digital plans must be supplemented by digital models of the rock mass in accordance with the requirements of geoinformation modeling. The article presents the developed method of creating a digital model of rock mass for integrated geographic information environment. The method uses a mathematical apparatus of pattern recognition theory and methods of data processing by GIS software packages and application modules. This method is a part of the developed method of the formation of the geological-forecast model on the basis of predictive-search characteristic contained in the prototype object models bank. The method allows to find the anomalous zones on the plan, divide the area of a seam into homogeneous areas with respect to geological conditions and to determine the indicator value of the point at the plan. Requirements for the created database with a digital description of the geofields using GIS tools are given.
Технологическое оформление процесса алкилирования ароматических соединений алкенами в присутствии кислотных катализаторов на основе ионных жидкостей
Authors: Клименко А.С. , Андреев Д.В. , Приходько С.А. , Тертишников И.В. , Адонин Н.Ю.
Published: October 2024

Актуальность работы обусловлена необходимостью создания эффективной технологии получения алкилароматических соединений, исключающей дополнительные стадии очистки конечного продукта. Целью работы является исследование процесса алкилирования на примере взаимодействия бензола с октеном1 в присутствии кислотного катализатора на основе ионной жидкости и хлористого алюминия, а также определение необходимых критериев для реализации этого процесса в опытнопромышленном масштабе. Использование в качестве катализатора алкилирования смеси соли диалкилимидазолия и безводного хлористого алюминия позволяет подавить побочные процессы смолообразования на стадии активации хлористого алюминия, что упрощает процесс очистки конечного продукта. Проведен кинетический анализ и найдены значения энергии активации и предэкспоненциального множителя исследуемой реакции. Показано влияние массопереноса исходных веществ к поверхности капли катализатора и определены условия, при которых это влияние нивелируется. Кроме того, с помощью эмпирических зависимостей подобрано стандартное оборудование и рассчитана скорость вращения перемешивающего устройства, которые необходимы для достижения требуемого гидродинамического режима в реакционной среде. Проведенные расчеты дали близкие результаты к таковым, полученным экспериментальным путем на прототипе аппарата объемом 0,5 литра с шестилопастным перемешивающим устройством и рассекателем.

The relevance of the work is due to the need to create a more environmentally friendly and costeffective technology for the alkylation of aromatic compounds without need additional stages of purification of the final product. The aim of the work is to study the process of alkylation of benzene with octene1 using an acidic catalyst based on an ionic liquid and to determine the necessary criteria for the implementation of this process on a pilot scale. The use of a mixture of dialkyl imidazolium salts and anhydrous aluminum chloride as an alkylation catalyst makes it possible to suppress the processes of tar formation and laborious purification of the final product. A kinetic analysis was carried out and the values of the activation energy and the preexponential factor of the studied reaction were found. The effect of mass transfer on the starting materials to the surface of the catalyst drop is shown and the conditions under which this effect does not change are determined. In addition, to ensure the required hydrodynamic conditions in the medium used. The calculations performed gave similar results to the results obtained experimentally on a prototype of a device with a volume of 0.5 liters with sixblade agitation and a divider.
Исследование взрывчатых композиций октоген ‒ производные нитротриазола
Authors: Казутин М.В. , Козырев Н.В. , Вакутин А.Г. , Комарова М.В. , Суханов Г.Т. , Лепин В.Н. , Васильев С.В.
Published: October 2024

Необходимость повышения безопасности эксплуатации боеприпасов приводит к смещению акцентов компоновки взрывчатых составов в сторону уменьшения рисков случайного взрыва, в том числе за счет снижения чувствительности к механическим воздействиям. В связи с этим задача замены тротила в литьевых взрывчатых композициях на менее чувствительные взрывчатые вещества является актуальной. В настоящей работе в качестве заменителей предлагается использовать производные нитротриазола, обладающие низкой чувствительностью к механическим воздействиям и приемлемыми технологическими свойствами. Приводятся результаты практических и численных исследований свойств литьевых взрывчатых составов, содержащих октоген, тротил, 1метил3нитро1,2,4триазол, третбутил3нитро1,2,4триазол и этоксиметил3нитро1,2,4триазол. Экспериментально доказано преимущество использования 1метил3нитро1,2,4триазола вместо тротила в составах типа октол . Представлен сравнительный анализ энергетических характеристик композиций октоген производные нитротриазола.

The safety of military munitions requires reducing the risk of accidental explosion, including by reducing mechanical sensitivity. This task for the injection of explosives is to replace trotyl. It is necessary to use less sensitive than trotyl explosives. In this paper, it is proposed to use nitroimidazole derivatives with low sensitivity to mechanical stress and acceptable technological properties as substitutes. The results of practical and numerical studies of the properties of casting explosives containing oktogen, trotyl, 1methyl3nitro1,2,4triazole, tertbutyl3nitro1,2,4triazole and ethoxymethyl3nitro1,2,4triazole are presented. The advantage of using 1methyl3nitro1,2,4triazole instead of trotyl in octol type compounds was experimentally proved. A comparative analysis of the energy characteristics of the compositions of octogen nitrotriazole derivatives is presented.
Оценка уровня защищённости автоматизированной системы на основе марковcкой модели киберугроз
Authors: Трапезников Е.В. , Магазев А.А.
Published: October 2024

В настоящей работе исследуется вопрос оценки защищенности автоматизированной системы обработки информации различного класса. Предлагается алгоритм проведения такой оценки с помощью одно стохастической марковской модели защиты информации. Алгоритм также включает в себя сбор и анализ исходных данных, использующий известную базу данных угроз и уязвимостей ФСТЭК РФ, а также последующую их экспертную оценку. Предлагаемый алгоритм реализован в виде программного средства.

Abstract In this paper, we study the issue of evaluating the security of an automated information processing system of a various class. For obtaining of such evaluation, an algorithm based a stochastic Markov model of information security is suggested. The algorithm also includes the collection and analysis of initial data using the threat and vulnerability data base of FSTEC Russia, and their subsequent expert evaluating. The algorithm proposed is realized as a software program.
Экспресс-анализ микрофотографий образцов базальтопластика в исходном состоянии и после климатического старения
Authors: Блазнов А.Н. , Кротов А.С. , Маркин В.Б. , Фирсов В.В. , Журковский М.Е. , Бычин Н.В. , Сакошев З.Г.
Published: October 2024

Предложен метод анализа влияния изменения свойств образцов базальтопластика в исходном состоянии и после выдержки в климатической камере при температуре 60 С и влажности 100 в течении 1 месяца на основе сравнения микрофотографий поверхности образцов. Сущность метода заключается в цифровой обработке микрофотографий поверхности с помощью комплекса программ Anaconda3, и преобразовании в гистограмму распределения градаций серого. Обработаны микрофотографии поверхности образцов в исходном состоянии и после климатического старения при увеличении в 100, 500, 1000, 2000 и 3000 раз. Различия между состояниями экспонирования (исходное, после климата) оценивалось с помощью сравнения кумулятивной функции распределения. Наибольшее различие поверхностей образцов наблюдается при обработке фотографий с увеличением в 500, 1000 и 2000 раз. Выявлено существенное изменение поверхности после первого месяца экспонирования образцов и менее существенное после второго месяца.

n analysis method for the effect of change in behavior of basalt fiberreinforced plastic specimens in initial state and after residence in a climatic chamber at 60 С and 100 humidity for 1 month by comparing micrographs of specimen surfaces is suggested herein. This technique involves digital processing of surface micrographs in Anaconda3 software package and rendering them into a greyshade distribution histogram. Surface micrographs of specimens before and after weathering at 100, 500, 1000, 2000 and 3000 zooms were processed. The difference between the states (initial state and after ageing) was evaluated by comparing the cumulative distribution function. The greatest difference in surfaces of the specimens was observed when processing the micrographs at 500, 1000 and 2000 zooms. A major change in the surface of specimens was observed after 1month exposure and a minor change was noticed in two months.
УЗ инструмент для реализации комбинированного воздействия в процессе бурения внеземных объектов
Authors: Хмелёв В.Н. , Барсуков Р.В. , Нестеров В.А. , Генне Д.В. , Qiquan Q.
Published: October 2024

В статье рассматривается проблема повышения эффективности ультразвукового (УЗ) бурения твердых материалов для исследовании грунтов планет, астероидов и других космических тел. Предлагается решение проблемы при помощи разработанного устройства, способного, одновременно с ультразвуковым, осуществлять воздействие при помощи низкочастотных макроколебаний и вращательного движения рабочей кромки инструмента. Испытания практической конструкции созданного устройства показали возможность повышения скорости ультразвукового бурения за счет дополнительных низкочастотных колебаний и псевдовращения до 1.5 раз.

Abstract The article describes the problem of increasing the efficiency of ultrasonic drilling of solid materials in the study of soils of planets, asteroids and other cosmic bodies. the Problem is solved by means of a device capable of simultaneously with ultrasound drilling using low-frequency oscillations and rotational motion of the working tool . Tests of the design showed the possibility of increasing the speed of ultrasonic drilling up to 1.5 times.
ИССЛЕДОВАНИЕ ПРОЦЕССА УЛЬТРАЗВУКОВОЙ КОАГУЛЯЦИИ ДИСПЕРСНЫХ ЧАСТИЦ ПРИ РЕАЛИЗАЦИИ РЕЖИМА СТОЯЧЕЙ ВОЛНЫ
Authors: Хмелёв В.Н. , Нестеров В.А. , Сливин А.Н. , Шалунов А.В. , Нестеров А.А.
Published: October 2024

В статье показаны результаты предварительных экспериментальных и теоретических исследований процессов коагуляции частиц в стоячей ультразвуковой волне. Исследования показали высокую эффективность коагуляции в режиме стоячей волны. С помощью разработанной модели получены зависимости эффективности коагуляции от режимов УЗ воздействия происходит за 2-2,5 секунды.

Abstract The article shows the results of preliminary experimental and theoretical studies of the processes of coagulation of particles in a standing ultrasonic wave. Studies have shown high coagulation efficiency in the standing wave mode. Using the developed model, the dependences of the coagulation efficiency on the modes of ultrasound exposure were obtained in 2-2.5 seconds.
ИССЛЕДОВАНИЕ МЕТОДОВ ОПРЕДЕЛЕНИЯ СЛОЖНОСТИ КОДА ПРИ ФОРМИРОВАНИИ НАБОРОВ ВХОДНЫХ ТЕСТОВЫХ ДАННЫХ
Authors: Сердюков К.Е. , Авдеенко Т.В.
Published: October 2024

Аннотация В данной статье рассматриваются способы определения сложности программного кода для формирования входных данных при тестирования программного кода. Несмотря на попытки автоматизировать процесс тестирования полная автоматизация возможна не для всех его этапов. Однако некоторые подпроцессы можно попытаться автоматизировать, например, формирование наборов данных для последующего тестирования. Сложность автоматизации этого этапа связана с тем, что данные сложно подобрать из-за большого числа возможных комбинаций. Поэтому для решения данной задачи особую ценность представляют эвристические подходы, которые не перебирают все возможные варианты, например, генетические алгоритмы. Использование генетического алгоритма позволяет найти достаточно большое число комбинаций, каждая из которых будет проверять определенный путь. При этом целевая функция, которая использует веса операций, может быть рассчитана разными способами. В данной статье определяются способы расчёта операндов для определения наиболее сложного пути при генерации тестовых данных на основе генетического алгоритма.

Abstract In this article we propose methods for determining the complexity of program code for generating input data in program code testing. Despite the attempts to automate the testing process, full automation is not possible for all stages. However, you can try to automate some subprocesses, such as generating datasets for later testing. The complexity of the automation of this stage is due to the fact that the data is difficult to select due to the large number of possible combinations. Therefore, to solve this problem, heuristic approaches that do not sort out all possible options, for example, genetic algorithms, are of particular value. Using the genetic algorithm allows you to find a fairly large number of combinations, each of which will check a specific path. Moreover, the objective function, which uses the weights of operations, can be calculated in different ways. This article defines methods for calculating operands to determine the most difficult path when generating test data based on a genetic algorithm.
T. MARTEMIANOVA’S PROPAEDEUTIC COURSE “PRO-PHYSICS”: EXPERIMENTAL EVALUATION OF EFFECTIVENESS
Authors: MARKUSHEV DMITRII S.
Published: October 2024

The purpose of this work was to evaluate the effectiveness of the propaedeutic course “PRO-physics” by T. Martemianova. The methods of this research are: analysis of sources on the issues of propaedeutics of physics, empirical methods (analysis of data arrays from electronic systems of educational process management, lists of winners and prize-winners of olympiads, statistics of admission to universities, survey methods), statistical methods of results processing. The study proposes a methodology for assessing the effectiveness of propaedeutic courses. The study revealed that students who took the “PRO-physics” propaedeutic course programme subsequently have higher results in physics olympiads at all levels, more often enter universities from the top 20 of the RAEX rating, better cope with intermediate and final control activities in physics within the framework of school education. The results of the questionnaire survey of teachers and students have shown high efficiency of the propaedeutic course under consideration.
Photochemical Formation of Trifluoroacetic Acid: Mechanistic Insights into a Fluoxetine-Related Aryl-CF3 Compound
Authors: Guo Zhefei , Attar Azka , Qiqige Qiqige , Lundgren Rylan , Joudan Shira
Published: October 2024

Trifluoroacetic acid (TFA) is a ubiquitous environmental contaminant; however, its sources are poorly constrained. One understudied source is from the photochemical reactions of aromatic compounds containing −CF3 moieties (aryl-CF3) including many pharmaceuticals and agrochemicals. Here, we studied the aqueous photochemistry of 4-(trifluoromethyl)phenol (4-TFMP), a known transformation product of the pharmaceutical fluoxetine. When exposed to lamps centred at UV-B, 4-TFMP formed up to 9.2% TFA at steady state under acidic conditions and 1.3% under alkaline conditions. TFA yields of fluoxetine were similar to 4-TFMP for acidic and neutral pH, but higher at alkaline pH, suggesting fluoxetine may have a mechanism of TFA formation in addition to via the 4-TFMP intermediate. Use of a 13CF3 isotopologue of 4-TFMP allowed for the tracking of TFA formation, which formed via multiple oxidative additions prior to oxidative ring cleavage. The oxidation is mediated by reactive oxygen species (ROS) generated through self-sensitized photolysis, with singlet oxygen and hydroxyl radicals as the key ROS. In addition to the TFA formation mechanism, other photochemical reactions of 4-TFMP resulted in defluorination and dimerization. Overall, this work expands the understanding of how TFA forms from aryl-CF3 compounds to better understand the total global burden of TFA.
Synthetic control over lattice strain in trimetallic AuCu-core Pt-shell nanoparticles
Authors: Jonasse Just Pé , Perxés Perich Marta , Turner Savannah J. , van der Hoeven Jessi E. S.
Published: October 2024

Core-shell nanoparticles can exhibit strongly enhanced performances in electro-, photo- and thermal catalysis. Lattice strain plays a key role in this and is induced by the mismatch between the crystal structure of the core and the shell met-al. However, investigating the impact of lattice strain has been challenging due to the lack of a material system in which lattice strain can be controlled systematically, hampering further progress in the field of core-shell catalysis. In this work, we achieve such a core-shell nanoparticle system through the colloidal synthesis of trimetallic Pt-shell Au1-xCux-core nanoparticles. Our seed-mediated growth methodology yields well-defined Au1-xCux-cores, tunable in composition from 0 at-% Cu to 77 at-% Cu, and monodisperse in size. Subsequent overgrowth results in uniform, epitaxially grown Pt-shells with a controlled thickness of ~3 atomic layers. By employing a multi-technique characterization strategy combining X-ray diffraction, electron diffraction and aberration corrected electron microscopy, we unravel the atomic structure of the trimetallic system on a single nanoparticle-, ensemble- and bulk scale level, and we unambiguously demonstrate the controlled variation of strain in the Pt-shell from -3.62 % compressive-, to +3.79 % tensile strain, while retaining full control over all other structural characteristics of the system.
Experimental Study on the Control of Wire Pickling Solution Concentration
Authors: Ma Yifei
Published: October 2024

Using diffusion dialysis technology, hydrochloric acid pickling solution from wire surface treatment is recovered. By adding new hydrochloric acid, the pickling solution maintains the concentration necessary for regular production, allowing continuous recycling in wire pickling to reduce the consumption of new hydrochloric acid. This study investigates the effects of the water-to-acid flow ratio, hydrochloric acid concentration, ferric chloride concentration, and receiving solution on the acid recovery rate and ferric chloride retention rate. The results indicate: (1) The water-to-acid flow ratio and receiving solution have little impact on acid recovery; (2) As the hydrochloric acid concentration increases, the recovery rate gradually decreases from 92% to about 85%, while the retention rate conversely increases from 75% to around 83%; (3) As the ferric chloride concentration increases, the recovery rate slowly rises, peaking at 92% when the ferric chloride concentration reaches 150 g/L, then slightly decreases, while the retention rate shows the opposite trend; (4) Recovered acid with a concentration of 238 g/L effectively treats rusted wire. The experiment confirms that diffusion dialysis technology can effectively reduce production costs and improve efficiency.