bluuebunny/crossref_metadata_2025_split huggingface dataset:
EFFECT OF PROCESS CONDITIONS ON ANTHRACENE HYDROCRACKING IN A SUPERCRITICAL SOLVENT
Authors: Александрова Д.И. , Степачёва А.А. 
Published: July 2023

Конверсия тяжелых углеводородов, в частности полиароматических, является одной из основных задач в нефтяной, угольной и биотопливной промышленности. Полиароматические углеводороды являются перспективным сырьем для получения веществ группы БТК (бензолтолуол-ксилол). Конверсия полиароматических соединений может осуществляться путем гидрирования или гидрокрекинга. Оба этих процесса характеризуются высоким расходом водорода. Для снижения или минимизации потребления водорода при гидроконверсии перспективно использование сверхкритических растворителей, которые способны быть донорами водорода. В данной работе проведено исследование процесса каталитического гидрокрекинга антрацена, а также подбор оптимальных условий, с целью получения о-ксилола с высоким выходом.
The conversion of heavy hydrocarbons, in particular polyaromatic hydrocarbons, is one of the main tasks in the oil, coal and biofuel industries. Polyaromatic hydrocarbons are promising raw materials for the production of BTX group (benzene-toluene-xylene) compounds. The conversion of polyaromatic compounds can be carried out by hydrogenation or hydrocracking. Both of these processes are characterized by high hydrogen consumption. Supercritical fluids being the hydrogen donors can be successfully used to reduce or minimize hydrogen consumption during hydroconversion. In this paper, the study of the process of catalytic hydrocracking of anthracene, as well as the choice of optimal conditions, in order to obtain o-xylene with a high yield were carried out.
AN IMPACT OF THE ALKYL SIDE CHAINS ON CHARGE TRANSFER PROPERTIES WITHIN THE STACKS OF D-π-A-π-D MOLECULES
Authors: Савченко В.А. , Гуськова О.А. 
Published: July 2023

В статье описываются результаты расчетов методом функционала плотности параметров, определяющих скорость переноса заряда в стопках, состоящих из молекул «донор (D)-π-мостик-акцептор (A)-πмостик-донор (D)». Параметрами расчета по теории Маркуса выступают энергия реорганизации, которая является свойством индивидуальных молекул, а также интеграл переноса заряда, рассчитываемый для молекулярных димеров. Еще одним важным структурным свойством молекул выступает боковой заместитель акцепторного блока – короткие алкильные цепочки линейного или разветвленного типа. Они могут влиять и на значения энергии реорганизации, и на морфологию пленки, то есть, на то, как организованы стопки молекул, от которого, в свою очередь, зависит и интеграл переноса заряда. Наконец, по формуле Эйнштейна-Смолуховского рассчитывается подвижность электронов и дырок для транспорта вдоль направления стэкинга. Эти значения сравниваются с экспериментальными данными, найденными в литературе, для полимеров с аналогичным мономерным звеном и отличающихся от рассчитанных молекул только длиной заместителя акцепторного блока.
In this paper, we describe the results of DFT calculations of some parameters defining charge transfer rate in the molecular stacks consisting of the donor (D)-π-bridge-acceptor (A)- π-bridge-donor (D) entities. Within Marcus’ theory for electron transfer, the following parameters need to be calculated: the reorganization energy, being the property of the individual, isolated molecules, and the charge transfer integral for the molecular stacked dimers. Another important structural property is the side substituent of the acceptor block – short alkyl linear or branched chains. They may affect both the reorganization energy and the thin film morphology, i.e. the molecular organization, which influences the value of the transfer integrals. Finally, using the Einstein-Smoluchowski equation for the diffusion of charged particles we define the mobility of electrons and holes for hopping through the molecular stack. The obtained values are compared with the published ones for polymers with analogous repeating units differing however in the length of the acceptor block’s side chains.
Analysis of methods for accounting cargo vehicles in traffic flow of a regulated crossroad
Authors: Donchenko V. V. , Shumskiy A. N. 
Published: July 2023

Introduction. The formation of a ‘cargo frame’ around large cities leads to a change in the composition of the traffic flow on bypass roads, and an increase in the total traffic flow of trucks of various categories. In addition, the active development of suburban areas with residential complexes contributes to an increase in traffic. The totality of the reflected phenomena leads to the emergence of a certain kind of transport problems, primarily associated with a decrease in throughput. Quite often, such problems are observed at regulated intersections, which requires a prompt change in the control mode; for this, the necessary measure is the mandatory consideration of the technical and dynamic parameters of trucks, which are not fully taken into account in the existing reduction factors. In order to establish the degree of influence of these parameters on the change in the main characteristics of the traffic flow, such as the average travel time and average speed, this study was carried out.Methods and materials. When performing the study, the methods of natural observation, statistical analysis and modelling were applied. The necessary materials for the study were devices for automatic collection of traffic flow characteristics, such as video cameras and traffic detectors, Any Logic version 8.0 for modelling, and a package of descriptive statistics in MS Excel.Results. In the course of the study and the experiment, a difference in the main characteristics of the traffic flow when using standard reduction factors and without using them, taking into account the dynamic and technical parameters of trucks was established. At the object of the study, the difference in the value of the average travel time () for various methods of accounting for trucks, observed in the range [-51.5%; 16.8%] and average speed () in the range [20%; 34%] was determined. As a result of mathematical research, functional relationships between the average speed and traffic intensity are determined, taking into account the presence of trucks of various categories, their technical and dynamic parameters. The ways of further research are determined.
Soot formation and effect on engine oils
Authors: Pashukevich S. V. 
Published: July 2023

Introduction. During the combustion of diesel fuel in a diesel engine with an increased fuel supply, as a result of its incomplete combustion, soot particles are formed, which are either released into the atmosphere or inevitably enter the engine oil. Soot, polluting the engine oil, causes a change in its quality indicators. Soot is very small particles formed by a complex reaction mechanism in the flame of a fuel-rich region during the combustion of hydrocarbons in the absence of air, mainly consisting of a mixture of amorphous carbon and organic matter.Materials and methods. This paper presents the results of a literary review aimed at studying the ways of soot occurrence during the operation of diesel engines, its effect. The mechanical properties of diesel soot are also discussed on the surfaces of friction pairs and engine components.Conclusions. The soot content in engine oil will increase sharply in engines with exhaust gas recirculation, which leads to an increase in temperature in the friction zones and viscosity of the lubricant, as well as to the formation of deposits on hot parts. These processes occur due to the discharge in the crankcase space and the intensification of the intake of gases from the combustion chamber. Oil change intervals should be monitored at an increased rate of soot entering the engine oil.Scope of the study / opportunity. This type of study will help determine the causes of soot in a diesel engine, understand the consequences of using engine oil contaminated with soot particles.Originality / value. The conducted research can be the basis for the development of recommendations for improving the maintenance of internal combustion engines for enterprises that have cars with diesel engines at their disposal in order to increase the resource of power units and reduce operating costs.
An Empirical Study of the Relationship Between Covid-19 and Jordanian Banks' Profitability
Authors: Kalbouneh Ahmad Yousef Ahmad , Alfauori Saja Ahmad Suliman 
Published: July 2023

Purpose: To investigate the impact of the COVID-19 pandemic on the profitability of Jordanian banks using financial disclosure data.

Theoretical framework: The study focuses on the impact of external environmental factors such as the COVID-19 pandemic and non-performing loans on the profitability of Jordanian banks.

Design/methodology/approach: The study uses a panel model to analyze financial disclosure data of 15 Jordanian banks between 2017 and 2021. The study employs both descriptive and inferential methods, utilizing a range of secondary sources including official reports, articles, electronic journals, and previous studies.

Findings: The study reveals that the COVID-19 pandemic had a negative impact on the Return on Assets (ROA) of Jordanian banks. Additionally, the number of bank branches, earnings per share, and non-performing loans were significantly associated with ROA and Return on Equity (ROE).

Research, Practical & Social implications: The study highlights the sensitivity of banks to external environmental factors such as pandemics and economic shocks, which can impact their solvency and trigger a chain effect that puts the entire economy at risk. The findings can inform policy decisions and help increase bank resilience in the face of future crises.

Originality/value: The study contributes to the literature on the impact of external environmental factors on the profitability of banks in emerging economies such as Jordan. The study's use of financial disclosure data provides a unique insight into the performance of Jordanian banks during the COVID-19 pandemic.
Does Digital Balanced Scorecards Lead To The Sustainable Performance Amongst The Jordanian SMEs?
Authors: Ibrahim Ishaq , Mohammed Alhamdi , Abdulaali Hayder Saadoon , Mohammad Majeed Mohsen , Ali Kalsom 
Published: July 2023

Purpose: This study aims to fill up a literature gap related to the sustainable performance in Jordanian SMEs, where the literature focused on limited variables related only to the human capital.

Theoretical framework: The researchers provided a suggested model to be implemented in the SMEs in Jordan as one of the industries that must be activated in the country to help the economy. Management accounting system and digital balanced scorecards were the main variables contributing, while variables like capital forecasting and decision making also were playing the role of the dependents variable for the D.BSC.

Design/methodology/approach: All of the mentioned variable toward sustainable performance in the Jordanian SMEs in this quantitative research tested via randomly distributing questionnaires among the employees of the industry with returned and valid for analysis of 910 surveys. Using SPSS for descriptive analysis and AMOS for the EFA and CFA.

Findings: The results deducted as there is a significant mediation role for D.BSC between MAS and decision making and insignificant mediation role for D.BSC between MAS and capital forecasting.

Research, Practical & Social implications: This research is suggesting a model and variables to be used by the SMEs in Jordan. This model will vast the SMEs industry and support the society by affording further employment chances.

Originality/value: The paper contributes to the body of knowledge and the Jordanian SMEs industry and Jordanian society. This paper targeting the most important industry in the country currently because such third world countries needed the SMEs referring to the previous studies.
The Relationship Between Individual Competencies and Creativity of Cadet with Knowledge Sharing: A Case Study at the Indonesian Pilot Academy
Authors: Iswahyudi Prasetyo , Dwiyanto  , Kosasih Ahmad , Putra Iwansyah 
Published: July 2023

Purpose: This study aims to analyze the effect of knowledge sharing on competency development, knowledge sharing on individual creativity, and competency development on individual creativity for cadets.

Theoretical framework: Knowledge sharing is a culture of social interaction that involves knowledge, experience and skills between members in an organization. Competency is a factor in achieving an organizational goal so that individual performance can increase. For creativity can be assumed as human power or ability to create something and then become the final result of a person's thinking.

Design/methodology/approach: This type of research is explanatory research conducted with the quantitative approach with 50 respondents from cadets at Politeknik Penerbangan Surabaya. The data analysis technique is used structural equation modeling (SEM) analysis with partial least square (PLS) tools.

Findings: This results are knowledge sharing has positive effect on the Competency Development, knowledge sharing has positive effect on Individual Creativity, and competency development has positive effect on Individual Creativity for cadets.

Research, Practical & Social implications: This research contributes to the application of teacher performance in learning class to improve competency development on individual creativity so that learning is more effective.

Originality/value: The results obtained in this study are innovative and relevant for lecture, in the context of knowledge sharing, competency development, and individual creativity for cadets.
Historical Development of Frontier Stock Markets in Sub-Saharan Africa
Authors: Imhanzenobe Japhet Osazefua 
Published: July 2023

Purpose: The purpose of this research is to review and compare the development of the three major frontier stock markets in Sub-Saharan Africa over time. The study provides some narrative around the historical development of each market as well as a theoretical backdrop for stock market development studies.

Theoretical framework: The adaptive market hypothesis was used as the theoretical backdrop for the study. The adaptive market suggests that stock markets develop in an evolutionary manner (similar to natural selection). This evolution of stock market development is influenced by changes in investors’ behavior and regulatory standards.

Design/methodology/approach: Data was collected from 1993 to 2020 on the IMF market efficiency score, the value of stocks traded, aggregate market capitalization, and the number of listed companies for the sample markets. The study used descriptive statistics and trend analysis to discuss and compare the stock market development indicators across the different selected frontier markets.

Findings: The study discovered an improvement in stock market performance across the sample period. The Johannesburg Stock Exchange was found to be the most developed of the three stock exchanges. The Nigerian Stock Exchange was second while the Nairobi Stock Exchange was third. Some factors that erode the performance of these stock markets were also discussed.

The practical and social implications: The sample stock markets are the major frontier markets, and so are often the first stop for foreign investors that want to penetrate the Sub-Saharan African markets. The performance of these markets often determines the level of foreign direct investment (FDI) and foreign portfolio investment (FPI) that flow into Africa.

Originality/ Value: Few studies have investigated the performance of stock markets in Sub-Saharan Africa. Also, the few studies that investigate the performance of these markets rarely proceed to discuss the market-wide factors that erode the performance of these markets compared to those of developed economies. Some factors like the size of the economy, low financial literacy, misplaced government policies, poor investment culture, buy-and-hold-tight attitude, and high transaction costs were identified and discussed.
Malaysia Small and Medium Size Businesses in Implementing Environment Management Practices
Authors: Kasdi Saiful Azmir , Ibrahim Irwan , Senathirajah Abdul Rahman S , Nor Nor Shahrul Nizam Muhamad 
Published: July 2023

Purpose: It is critical to understand the drivers behind environmental management practises, or EMPs, as they may be measured as important variables in fixing environmental challenges for businesses. Therefore, the goal of the research is to investigate the variables applying their establishment's environmental management techniques.

Theoretical framework: The environment awareness and attitudes factor in Gadenne’s (2009) Model of External Influences on Environmental Awareness and Practices (MEAP) is suitable variables to represent the research. Based on the Gadenne’s MEAP construct; general awareness, cost benefits awareness, and environmental attitudes; these are the characteristic of an individuals to show the level of their concerns and responsiveness towards the environment.

Design/methodology/approach: The study is to determine the factors adopting environment management practices in Malaysia logistics industry. Variables introduced are from systematic literature review of related articles and journals. The papers were analysed from descriptive, bibliographic, methodologic, results and citation characteristics.

Findings: According to the findings, it is crucial that small and medium-sized businesses adopt environmental activities such as those pertaining to stakeholder force, environmental legislation, industrial sectors, company sizes, manager traits, human resources, global competition, organisational structures, corporate operation activity, green innovation characteristics, and position in the value stream, strategic attitude, and geographical position.

Research, Practical & Social implications: This study is necessary to create a new framework for promoting EMP adoption behaviour among logistics business owner. This study connect technology acceptance and innovation adoption research with environment awareness behaviour in alleviating the impact of technology adoption among business owner.

Originality/value: Within the field of technology acceptance and innovation adoption, this study will make a substantial contribution to the corpus of knowledge as it advances the integrative approach to innovation adoption behaviour.
Effective Role of Human Resource Management Policies Within Marketing Organization: The Impact on Business and Marketing Strategy Implementation
Authors: Indrajit Goswami  , Hamida Abdel Ghaffar Ben , Gopal Suraj Peelamedu , Kumar Jalaja Anil 
Published: July 2023

Purpose: The purpose of this study is to examine the effective role of human resource
management (HRM) policies within marketing organizations and their impact on business and marketing strategy implementation.

Theoretical framework: The study will be based on the resource-based view of the firm, which posits that a firms resources and capabilities can be a source of sustainable competitive advantage.

Design/methodology/approach: The study will use a quantitative research design, collecting data through surveys administered to employees and managers within marketing organizations. Data will be analyzed using statistical techniques to identify relationships between HRM policies and business and marketing strategy implementation.

Findings: The findings of the study will provide insights into the impact of HRM policies on business and marketing strategy implementation and identify specific HRM practices that are associated with better performance outcomes. The major findings of this study are that the HRM policies improve the growth of a business and deliver quality work to the customers by understanding the external and internal affairs. The HRM policies improve the growth of a business and deliver quality work to the customers by understanding the external and internal affairs.

Research, practical and social implications: The results of the study will have implications for practitioners, as they will provide guidance on how to design and implement effective HRM policies within marketing organizations. Additionally, the study will contribute to the broader understanding of the role of HRM in organizational performance.

Originality/value: This study will be among those to examine the role of HRM policies in marketing organizations, providing new insights into how these policies can be leveraged to improve organizational performance.
GAMBARAN MALOKLUSI GIGI TERHADAP KUALITAS HIDUP REMAJA USIA 12-14 TAHUN DI SMP NEGERI 29 SEMARANG
Authors: Husna Ahyi Alfia 
Published: July 2023

Background: Malocclusion is a condition in which the occlusion of the teeth is not in accordance with the normal condition. The prevalence of malocclusion in Indonesia is still common and quite high. The state of malocclusion not only interferes physically but also mentally so that it can reduce the quality of life. Quality of life is seen from four domains, namely oral symptoms, functional limitations, emotional well-being, and social well-being. The purpose of this study was to describe the state of dental malocclusion in adolescents aged 12-14 years at SMP Negeri 29 Semarang and its relationship to quality of life.Method: It was a cross-sectional study with 75 samples aged 12-14 years that met the research criteria. Retrieving data used the Child Perception Questionnaire for ages 11-14 years (CPQ11-14) which had been translated into Indonesian. The examination ofmalocclusion severity used ICON index (Index of Complexity, Outcome, and Need), anddata analysis used was Rank Spearman correlation test.Results: The results of 75 total samples found that the majority of samples with very mildmalocclusion severity as many as 30 samples (40%) had a good quality of life. There was a significant correlation between dental malocclusion and overall quality of life (p <0.05),in the domain of emotional well-being and social welfare there was a significant relationship (p <0.05), but in the oral symptoms domain and functional limitations there was no significant relationship with malocclusion namely (p-value 0.057) and (p-value 0.061).Conclusion: There was a significant relationship between dental malocclusion and overall quality of life (p>0.05