bluuebunny/crossref_metadata_2025 huggingface dataset:
The Impact of Real Traffic from Twitter for 5G Network Deployment
Authors: Hikmaturokhman Alfin , Ramli Kalamullah , Suryanegara Muhammad , Mardian Raden Deiny , Baharsyah Amir Musa , Amanaf Muntaqo Alfin , Abdi Muhammad , Wijayanti Yuyun Dwi
Published: April 2023

The utilization of technology, particularly cellular networks, is continuously expanding. This is evident through the increasing number of mobile network operators (MNOs) users, especially in the current era where most things are accomplished online. Consequently, mobile network operators must furnish a comprehensive array of cellular network access services, not just for smartphones but also for other smart devices, to guarantee maximum coverage. With the growing interest in 5G deployment based on low band and millimeter wave communication (mmWave) for outdoor use scenarios, such as tourist destinations, site design experts are looking for sophisticated real-time traffic data from social media like Twitter to simulate and calculate outdoor radio coverage using 3GPP 38.901 prediction models. This study used the frequencies of 700 MHz and 26 GHz, utilizing Inter-band Carrier Aggregation (CA) to increase data rates while maintaining a wide range and optimizing the number of gNodeBs. This research is intended to monitor the Borobudur Temple area, Indonesia, which serves as a tourist destination and one of the world's wonders, thus making it a densely populated area and, inevitably requiring good network connectivity. The parameters used are Synchronization Signal Reference Signal Received Power (SS-RSRP), Synchronization Signal Signal to Interference plus Noise Ratio (SS-SINR) and data rate. The simulation revealed that CA SS-RSRP with traffic map increased by 38.88%, SS-SINR increased by 45.05%, and the peak data rate increased from 5884.12 Mbps to 6199.88 Mbps.
The Analysis of Factors Affecting Behavioral Intention and Behavior Usage of E-Wallet using Meta-UTAUT Model
Authors: Hakim Muhammad Malik , Afifah Alissa Nida , Aryotejo Guruh
Published: April 2023

Massive increase in e-wallet users makes e-wallets an alternative payment transaction method in Indonesia. Research and surveys by Boku Inc. predict that e-wallet users in Indonesia will increase by three times in 2025. This study aims at identifying the factors underlying users' intention and behavior in using e-wallet services by applying the meta-UTAUT model. Variables were examined in the meta-UTAUT model, and other variables, including anxiety, trust, redressal, and service smartness, that underlie the purpose and behavior of using e-wallets from the user's perspective were added. This research is a quantitative study making use of primary data collected through online questionnaires to 269 e-wallet service users. The PLS-SEM method was utilized as a statistical analysis method with SmartPLS 3.3.3 software to process the data. This study found that trust has a positive effect on acceptance attitudes, redressal has a positive effect on trust, and service smartness has a positive effect on behavioral intentions. In contrast, anxiety negatively influences user attitudes towards e-wallet services, while effort expectancy and social influences have no direct and insignificant effect on intentions to use e-wallets. To contribute to e-wallet research that focuses more on the user's perspective, further research is on investigations of perceived security and perceived risk so that the model used can have predictive relevance with a higher R-square value.
A Study on the Efficiency of Solar Radiation Collectors Applying for Agricultural Products and Food Drying
Authors: Nguyen Huy Bich , Nguyen Van Lanh
Published: April 2023

Reducing the use of conventional energy in agricultural production and food processing via using renewable energy is one of the key points to protect our environment. Solar radiation might be an excellent source for replacing traditional heat sources in drying technology. This study aims to analyze and investigate the efficiency of different solar radiation collectors to apply for agricultural products and food drying. Seven solar radiation collectors have been developed and manufactured for experimental investigation. The first is a flat plate solar collector. The second is a pipe collector covered by transparent polyethylene. The third is a copper pipe collector placed on the focus of a parabolic trough. The fourth is a glass pipe collector placed on the focus of the parabolic trough (Experimental testing with fluid is air). The fifth is a glass pipe collector placed on the focus of the parabolic trough (Experiment testing with fluid is water). The sixth is the pipe collector placed on the focus of the parabolic cylinder with no extent to the collector (the parabola is insulated). The last is the pipe collector placed on the focus of the parabolic cylinder with an extended collector (the parabola is insulated). The experimental investigation results indicate that the collector efficiency depends on the solar radiation intensity, the mass flow rate of heating receiver substances, and the structure of the solar collectors. The high solar radiation intensity generates high efficiency. The Pipe collector is placed on the focus of the parabolic cylinder with an extension of the collector (the parabola is insulated); the highest solar collector efficiency with 50.58% at the air flow rate is 0.218 kg/s while the Glass pipe collector placed on the focus of parabolic trough (Experiment testing with fluid is air) has the lowest efficiency as 4.55%.
MODIFIED CAPACITANCE MODEL IN THE CORONA PLASMA DISCHARGE
Authors: Yoyo Wardaya Asep , Muhlisin Zaenul , Gunadi Isnain
Published: April 2023

This research calculates the modified capacitance of the electrode capacitively coupled plasma (CCP) model with a crown sharp-plane configuration. The CCP model is an electrode model similar to the principle of a capacitor in a conventional circuit but differs in the arrangement of the electrodes. In the case of a positive corona, the structure of the positions of the active electrodes is almost vertical in the air, and the part of the passive electrodes is lying horizontally under the active electrodes. The shape of the active electrode is sharp at the tip of the electrode, which will cause a high potential gradient in that area, resulting in a more significant plasma discharge in the pointed area than in the less sharp area. A current multiplier factor k is entered in the tapered region of ​​calculating the capacitance model (modified capacitance) to anticipate the difference in the plasma flow. The modified capacitance model for calculating the corona discharge's current-voltage (I-V) characteristics has proven that geometric calculations of the electrodes can also be carried out without using a physical calculation model (Maxwell's equations).
Las redes sociales como sistema de comunicación en las universidades del AMBA, Argentina
Authors: Naón Gustavo
Published: April 2023

En el Siglo XX, los medios masivos de comunicación social se instalaron como instancias que favorecieron los debates sociales y contribuyeron a un proceso de ampliación de la participación de la ciudadanía en el ámbito público. Internet y el abaratamiento de los dispositivos digitales convirtieron a las antiguas audiencias en usuarios. La web 2.0, se diferenció de su antecesora, (conocida como 1.0), por un rasgo fundamental: la participación colaborativa. En las sociedades de masas, los media se disponen como una herramienta indispensable para que tanto los poderes constituidos como los fácticos alcanzaran a la ciudadanía, transformándose en el “ágora” del fin de la modernidad. En este contexto, el acceso a los recursos comunicativos que permiten la producción de significados resulta esencial en las complejas relaciones de poder. Por su parte, los espacios de resistencia, con la misma lógica necesitan de la construcción de discursos alternativos que propicien una resignificación. El nuevo mapa de medios, en los que se destacan las redes sociales, demanda una nueva definición de la participación ciudadana. El objetivo de este trabajo es presentar una propuesta de análisis de la actividad en redes sociales de las universidades nacionales del Área Metropolitana de Buenos Aires (AMBA), República Argentina.
Promotion of Entrepreneurship in the Ljubljana Urban Region Through PONI LUR
Authors: Djurica Maja , Djurica Nina , Marinčič Dejan , Marič Miha
Published: April 2023

When discussing entrepreneurship, we have a subresearch area in this field, which deals with establishing and conducting own business operations in specific ways, sometimes also based on gender differences. We discuss incentives and obstacles to the development of entrepreneurship, as an economic and social growth factor. Entrepreneurship is promoted via state incentives. We will present one of such incentives, which involves a majority of women entrepreneurs named PONI LUR: An entrepreneurial approach to challenges in the Ljubljana Urban Region. With this paper we give our contribution to increase the visibility of entrepreneurial achievements and encourage individuals to put their own entrepreneurial ideas into actions.
Spletne nakupne navade potrošnikov v Sloveniji
Authors: Đukić Viktorija , Marolt Marjeta
Published: April 2023

Consumers nowadays have access to a variety of information. On the one hand, the digital environment offers a wealth of information opportunities, but on the other hand, information overload makes decision-making more difficult. When deciding on making a purchase, consumers usually go through several stages of the purchasing process, from identifying a need, searching for information and evaluating their options, to completing the purchase and expressing their satisfaction or dissatisfaction with the purchase. Consumers can skip these stages or reverse their order. According to the Statistical Office of the Republic of Slovenia, the proportion of consumers who buy online, has increased over the last two years. As publicly available data do not provide a detailed insight into the purchasing habits of digital consumers, we have conducted a survey among Slovenian consumers in the summer of 2022. In this paper, we present the findings of our survey.
Blessing or a Curse? The Analysis of the Resource Management of Hungarian Family-Owned Wineries
Authors: Heidrich Balázs , Vajdovich Nóra
Published: April 2023

The aim of the study is to provide an analytical overview of the resources and their management ensuring competitiveness of Hungarian family wineries. Family businesses need to be conscious of their various resources and to be able to identify and apply those to maintain competitiveness and to achieve the objectives. The awareness and possession of these resources is not in itself a sufficient basis; an organization-based optimal combination and effective integration are also crucial for success. The aims of the research carried out by the Budapest Business School were to identify and classify the existent and possible resources of Hungarian family business wineries. Furthermore, the research aimed to identify how these resources were integrated into the daily operation. Managing resources in an effective way and integrating them into a strategy is a creative, managerial task requiring metaskills, experience, and tacit knowledge. This qualitative empirical research proves that familiness can facilitate but also complicate the operation of family businesses. The study demonstrates that resource-based theory can explain the performance of family businesses as well as an optimal combination of resources allows to gain competitiveness, but a real competitive advantage is linked to the goal setting of the manager, whose tool is the efficient resource management.
Students' Opinions and Attitudes about Online Teaching
Authors: Jokanović Vesna , Marković Elena
Published: April 2023

The appearance of the pandemic changed everyday life on the entire planet in a very short time. In order to preserve health, all possible activities were digitized. Traditional teaching has been replaced by distance learning. The educational staff in our country has started online teaching in a very short time. Curricula have begun to be realized via the Internet applications. In order to improve online teaching, it is necessary to examine its shortcomings and advantages both by teachers and students. The results of research related to students' opinions and attitudes about the organization of online teaching and their personal opinion are presented in the paper.
Strateško obvladovanje portfelja procesov, projektov in nalog
Authors: Kern Tomaž , Krhač Andrašec Eva , Urh Benjamin
Published: April 2023

Strategic management of a portfolio of processes, projects, and tasks is understood as a constant focus of a company or institution's limited resources on implementing a business strategy using all available business capabilities and technological support. Suppose the company intends to manage the portfolio uniformly. In that case, it is first necessary to understand the different forms of processes similarly. In addition, it is essential to design the organization accordingly and adapt the technological support accordingly. This is highly complex, and an individual cannot fully understand and control the portfolio at once. In practice, therefore, new approaches are emerging that make this possible. They contain digital transformation methods and use modern technological enablers. Of course, the approaches are more than technological. Most approaches are organizational and only involve technology. This paper provides a systematic review and description of these approaches, their potential, and the obstacles to implementation.
Predpisovanje zdravil za zdravljenje duševnih in vedenjskih motenj zaposlenim v zdravstvu v obdobju od 2015 do 2020
Authors: Korošec Darja , Vrbnjak Dominika , Štiglic Gregor
Published: April 2023

Health workers are particularly exposed to the incidence of mental disorders, which have been on the rise in recent years. Mental disorders are associated with the use of medication to treat mental and behavioral disorders. In a retrospective observational study, we analyzed data on the consumption of medications for treating mental and behavioral disorders (anxiolytics, antipsychotics, antidepressants) among all healthcare workers employed in Slovenia from 2015 to 2020. The most prescriptions for mental and behavioral disorders medications were recorded in groups of medical doctors and pharmacists. Most prescriptions were issued for antidepressants during the mentioned period. In the years from 2015 to the end of 2020, the highest number of prescriptions for antidepressants were issued by health technicians, followed by medical doctors and nursing. The prescription of medications for treating mental and behavioral disorders was on the rise from 2015 to 2020. Mental health is important for every individual and society; therefore, it is important to systematize effective preventive programs and programs to help people who need it, especially health workers, since their work represents an important factor in maintaining health in society
Odprta vprašanja in izzivi medpoklicnega sodelovanja v zdravstvu
Authors: Kralj Danijela
Published: April 2023

Modern healthcare is always facing new challenges, both due to new diseases and due to open systemic questions in the internal and wider social enviorment. Experts who search for breakthrough solutions, emphasize that patient care remains the primary task of healthcare. While solving pressing systemic problems, they advise considering new business models, according to which advanced systems already include (integrate) advanced solutions, supported by new technologies, artificial intelligence, robotics and digitalization. All this contributes to a growing need in healthcare for inclusive work enviorment and interprofessional (interdisciplinary) cooperation of various fields and professions. In this regard, the central part of the title paper is intended to show the results of a newer research on the impact of an inclusive work enviorment on interprofessional cooperation in healthcare, carried out in the period 2021-2022 as part of a postgraduate doctoral thesis.
Improving Entrepreneurial Journey Through Good Business Practices
Authors: Kremsar Sara , Marič Miha
Published: April 2023

The paper describes the results of a survey conducted among more than 100 CEOs and best-in-class leaders in the entrepreneurial world. The survey aimed to gather advice and insights on improving the entrepreneurial journey through good business practices. Entrepreneurship is a challenging journey that requires a combination of skills, knowledge, and experience. The survey aimed to provide valuable insights to young entrepreneurs and those already in the world of entrepreneurship who face various challenges on their way towards optimum success. The survey results reveal a wide range of advice and recommendations for improving the entrepreneurial journey. These include the importance of having a clear vision, building a strong team, developing a growth mindset, and continuously learning and adapting to the ever-changing business environment.
Artificial Intelligence and Career Development
Authors: Lavrač Janja , Meško Maja , Jereb Eva
Published: April 2023

In modern life, we are inundated with modern technology that accompanies us at home and work. Technology makes our everyday life a lot easier, but at the same time, the rapid development of technology and artificial intelligence may cause fear among people. In our article, we focused on the impact of artificial intelligence on employees' career development. A few authors state that in the future, people will be pushed out of their jobs and replaced by robots. However, recent research shows that using artificial intelligence in human resource management does not lead to a decrease in the number of employees but rather encourages employees to educate for work positions with greater added value. In our paper, we will present some facts about artificial intelligence and break down the types of artificial intelligence. First, we will touch upon the tools based on artificial intelligence and continue by looking into the use of artificial intelligence in human resource management and the advantages of using artificial intelligence. In conclusion, the contribution of artificial intelligence to employee career development will be presented.
Group Brainstorming Support by ChatGPT & Ayoa at the Design of Regional Development Plan
Authors: Lavrič Franc , Škraba Andrej
Published: April 2023

The possibility to apply modern AI tools such as ChatGPT and Ayoa at the design of regional development plan of Gorenjska region is considered. With both systems 496 ideas were generated in the scope of human resources development. Generated ideas were categorized using Latent Dirichlet Allocation, Non-negative Matrix Factorization, human experts and ChatGPT. The entropy of the generated ideas was determined in order to compare ChatGPT and Ayoa. The hypothesis of diversity was confirmed by Mann-Whitney U test. In order to analyze the categories the word cloud was generated with programming language python for all four generative sessions. Python’s pyLDA tool was applied for drill down analysis of indicated categories. The methodology has been proposed to integrate the human and AI actors to enhance brainstorming and decision-making processes.
Interdisciplinarnost pri upravljanju oskrbovalnih verig krožnega gospodarstva
Authors: Mežnar Dušan
Published: April 2023

Supply chains drive the global economy and enable the delivery of goods and services worldwide. The nature and content of supply chain management is such that it is virtually impossible to operate successfully without combining knowledge from several different disciplines. The fact is that companies working on sustainable circular economy supply chains are very diverse. All of them are focuses to deal with the overlap between supply chain management and industrial ecology, to indentify and manage sinergies by-products , design and manufacture of new products-service systems, greener products development and marketing, and business opportunities creation related to sustainable development and the circular economy. The main purpose of this article is to present an interdisciplinary approach to supply chain management, the constraints and pitfalls, and the different approaches or models for creating coordinated supply chains with sustainability in mind and with elements of a circular economy in business-to-business transactions.
Intergenerational Cooperation in the Work Environment
Authors: Pintarič Katja , Marič Miha , Balantič Zvone
Published: April 2023

We often encounter employees of different generations in the work environment. Older employees want to stay in organizations, but there are more and more younger employees who want to enter the labour market. For different generations to work synergistically, it is necessary to establish intergenerational cooperation. This kind of cooperation enables the exchange of knowledge, the establishment of empathy at the workplace and directly affects the well-being and health of older employees. A condition for establishing intergenerational cooperation is awareness of its importance and what it can contribute to organizations. In our research on a sample of 121 people we analysed the responses regarding relations between younger and older employees in companies and prejudices of younger employees towards older employees. We also discuss on the topic of intergenerational cooperation and give our opinion and recommendations.
Issue of Online Reputation of Electric Vehicles - Selected Views and Perspectives in the Context of Interyear Development
Authors: Pollák František , Markovič Peter , Világi Róbert , Konečný Michal , Kalamen Kristián
Published: April 2023

The study is to provides an analytical view to the gradual development in the issue of online reputation management of selected EV manufacturers. The research is carried out as a follow-up to the previous year, in which basic measurements were implemented in order to define the initial state of the topic. The research is also carried out with a view to new energy challenges in the period of a possible onset of recession. Active marketing communication, as well as a holistic approach to brand management, represents a proactive approach to solving global challenges. In this approach, creating and sustaining digital communities that form the backbone of brand identities in online markets is still a challenge. The results of the study represent the gradual phase of examining the issue of reputation management of entities operating in the field of low-carbon economy
Interdisciplinarnost na področju ekonomskega bremena demence
Authors: Sedlak Sabina , Jelenc Marjetka
Published: April 2023

The number of elderly people is increasing, which represents a major public health and financial challenge, as Slovenia is a country with a long-lived society. Dementia represents one of the greatest challenges. National Institute of Public Health collaborates with experts from various fields to assess the economic burden of dementia. We analyzed the burden for Slovenia from 2015 to 2020 based on the calculation of indirect and direct costs. The burden is high but underestimated, cooperation with various institutions is important. Linking different sources of data would contribute to a more accurate assessment. Multidisciplinary treatment approaches and an adapted environment for patients are needed. Public awareness, prevention, cooperation in this field are key factors for improvements, as understanding the disease and dealing with it correctly leads to a better quality of life for the individual, which is reflected in better economic results and lower costs of the health care system.
Mladi športniki in njihove aktivnosti
Authors: Žnidaršič Jasmina , Bernik Mojca
Published: April 2023

Young athletes often encounter difficulties in finding a balance between sports and other activities in their lives. They devote most of their time to training, which means that they run out of time for other activities, often even putting sports obligations before education. The Law on Sports in Slovenia enables young athletes to acquire the status of an athlete, which means that it is easier to strike a balance between sport and education. Despite this, they often run out of time to socialize with peers and family obligations. The paper presents the results of a survey conducted among young athletes in Slovenia, the aim of which was to determine whether young athletes in Slovenia, who are not yet categorized as athletes, have a balance between sports and other activities.
Isolation and identification of antagonistic fungi of fungi associated with chili wilt in southern Guanajuato, Mexico
Authors: Martínez-Martínez Talina Olivia , Martínez-Camacho Adriana Paola , Rodríguez-Guerra Raúl , Mariscal-Amaro Luis Antonio , Rivas-Valencia Patricia
Published: April 2023

The chili crop (Capsicum annuum) in Mexico represents an important economic source; however, every year there are losses in production of 40 to 100% due to the root disease known as wilt, which causes premature death of plants, this disease is caused by the fungi complex formed by Rhizoctonia solani, Fusarium oxysporum, Fusarium solani and Phytophthora capsici. The objective of this research was to isolate antagonistic fungi to the pathogens causing wilt from soil samples obtained in the southern of the state of Guanajuato, Mexico. Antagonistic fungi potential against Rhizoctonia spp., Fusarium spp. and Phytophthora spp. were isolated. Then three fungi isolates presented antagonistic potential, inhibiting mycelial growth by 41 to 83%. Molecular identification of the antagonist fungi was performed by amplifying the intergenic transcriptional regions (ITS) of the 18S ribosomal DNA component of fungi. This research contributes to the study of biological control of root pathogens using beneficial native microorganisms present in crop soils affected by pathogens associated with chili wilt in southern Guanajuato, Mexico.
First occurrence of Dasheen mosaic virus (DsMV) in Xanthosoma riedelianum (Mangarito) in Brazil
Authors: Colariccio Addolorata , Ramos Alyne de Fátima , Rodrigues Chaves Alexandre Levi , Lembo Duarte Ligia Maria , Harakava Ricardo , Azevedo Filho Joaquim Adelino , Kitajima Elliot W.
Published: April 2023

Xantosoma riedelianum, also called “mangarito” in Brazil, is an unconventional food plant (UFP) of the Araceae family native to tropical America. Foliar samples of the X. riedelianum showing mosaic, mottle and vein clearing symptoms were collected in the municipality of Monte Alegre (São Paulo State). Transmission electron microscope observations, mechanical transmission to experimental plants, serological (DAS-ELISA) and RT-PCR analyzes indicated that the symptoms could be associated with the presence of dasheen mosaic virus (DsMV, Potyvirus). This is the first report of DsMV in X. riedelianum in Brazil.
Evaluation of resistance to Fusarium wilt race 1 in new banana clones
Authors: García-Velasco Rómulo , Ventura-Martín José de La Caridad , Lorenzo-Feijoo José C. , Portal-González Nayanci , Santos-Bermúdez Ramón , Rodríguez-García Armando , Companioni-González Barbarita
Published: April 2023

In previous works, a method was developed for the differentiation at the foliar level of the response of banana plants to Fusarium race 1 wilt, which constitutes a useful tool to increase the efficiency of resistance selection in ex vitro conditions. The objective of this work was to evaluate resistance to this disease in new banana clones using the evaluation method mentioned. For this, six moments of evaluation were made; and ten plants of each selected line of the irradiated ‘Zanzíbar’ clone were used. The results showed that the plants of the evaluated lines of the irradiated ‘Zanzíbar’ clone indicate that they are promising materials for genetic improvement in the crop aimed at resistance to this disease. On the other hand, a response to selection was obtained in a short time (48 hours), as well as evaluating the lines selected from large populations of plants (60 plants) with the exclusion of other organisms; and the control of environmental conditions that could interfere with the results obtained. However, it is necessary to continue additional studies in the field to confirm the resistance in the evaluated lines.
ВОЗОБНОВЛЯЕМОЕ ПРИРОДНОЕ СЫРЬЕ – ОСНОВА ПОЛУЧЕНИЯ МНОГОФУНКЦИОНАЛЬНЫХ БИОПОЛИМЕРНЫХ РЕАГЕНТНЫХ СИСТЕМ ДЛЯ ПРИМЕНЕНИЯ В НЕФТЕПРОМЫСЛОВОЙ ХИМИИ
Authors: Логинова Марианна Евгеньевна , Четвертнева Ирина Амировна , Мовсумзаде Эльдар Мирсамедович , Ахтямов Эрик Касимович , Чуйко Егор Валерьевич
Published: April 2023

Ссылка для цитирования: Возобновляемое природное сырье – основа получения многофункциональных биополимерных реагентных систем для применения в нефтепромысловой химии / М.Е. Логинова, И.А. Четвертнева, Э.М. Мовсумзаде, Э.К. Ахтямов, Е.В. Чуйко // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.117-125.

Актуальность исследования обусловлена необходимостью использования как невозобновляемых, так и возобновляемых природных ресурсов для обеспечения мировой энергетической потребности. Цель: использование продуктов возобновляемого сырья, обладающих сходными технологическими характеристиками (крахмала, гуаровой камеди и нейтрального лигносульфоната), для создания новых реагентных систем ЛКР-1 и ЛГКР-1 с целью применения в нефтепромысловой химии, в частности в составе буровых растворов для использования при строительстве нефтегазовых скважин. Методы: комплекс существующих базовых методов исследования свойств исходных сырьевых материалов и продуктов синтеза природных полимеров; оценка и анализ показателя консистенции и коэффициента нелинейности (вискозиметр Брукфильда), реологических (ротационный вискозиметр фирмы Fann) и фильтрационных свойств (фильтр-пресс фирмы Fann), разработанных реагентных систем и известных марок камедей. Результаты. Показано, что для России вопрос грамотного использования продуктов возобновляемого сырья является актуальным, поскольку она является мировым лидером по владению лесными запасами и древесиной. Представлено строение древесины как полимерной композиции и основные компоненты как лиственных, так и хвойных пород – целлюлозы, камелей, крахмала, лигносульфлнатов. Представлен перечень отечественных и зарубежных ученых, чьи работы посвящены исследованию и применению природных полимеров в нефтепромысловой химии, продуктов возобновляемого природного сырья. Рассмотрено влияние основных применяемых в нефтепромысловой химии природных полимеров и их модифицированных форм на технологические параметры технологических жидкостей. Рассмотрены свойства разработанных реагентных систем и составляющих их компонентов, и установлено наличие псевдопластичных свойств реагентной системы ЛКР-1 при том, что ее компоненты – крахмал и лигносульфонат – данными свойствами не обладают. Установлено, что компонент реагентной системы ЛГКР-1 – гуаровая камедь растительного происхождения, придает разработанному реагенту псевдопластичные свойства, сопоставимые со свойствами реагентов на основе более дорогой ксантановой камеди ферментативного способа получения.
МЕХАНИЗМЫ ОБРАЗОВАНИЯ АСФАЛЬТОСМОЛОПАРАФИНОВЫХ ОТЛОЖЕНИЙ И ФАКТОРЫ ИНТЕНСИВНОСТИ ИХ ФОРМИРОВАНИЯ
Authors: Коробов Григорий Юрьевич , Парфенов Дмитрий Викторович , Нгуен Ван Тханг
Published: April 2023

Ссылка для цитирования: Коробов Г.Ю., Парфенов Д.В., Нгуен Ван Тханг. Механизмы образования асфальтосмолопарафиновых отложений и факторы интенсивности их формирования // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.103-116.

Актуальность работы обусловлена недостаточной изученностью процесса образования отложений парафина на внутренней поверхности нефтепромыслового оборудования. Исследовательский опыт показал противоречивые результаты, что указывает на отсутствие общепринятой теории, описывающей процесс образования парафиновых отложений и влияние различных факторов на интенсивность их формирования. При этом свойства отложений парафина существенно зависят от условий протекания процесса их образования. Соответственно, более точное понимание принципов формирования отложений позволяет прогнозировать их рост и подбирать эффективные способы борьбы с данным осложнением. Цель: рассмотреть основные механизмы образования отложений парафина, а также провести анализ результатов предшествующих работ, посвященных исследованию факторов интенсивности их формирования. Объекты: процесс образования парафиновых отложений на внутренней поверхности нефтепромыслового оборудования и факторы интенсивности их формирования. Методы: выполнение литературного обзора и проработка публикаций в рецензируемых изданиях; анализ, сопоставление результатов предшествующих исследований. Результаты. Описаны основные механизмы образования отложений парафина на внутренней поверхности нефтепромыслового оборудования, такие как: молекулярная диффузия, сдвиговое воздействие, гравитационное осаждение, броуновское движение и термодиффузия. Представлен обзор предшествующих исследований, посвященных оценке вклада указанных механизмов в процесс образования отложений парафина и изучению влияния факторов интенсивности их формирования, таких как: обводненность продукции, режим и скорость потока, газосодержание, компонентный состав нефти и свойства материалов, из которых изготовлено оборудование. Проведенный анализ позволил выявить противоречивые результаты и зависимости, что подтверждает необходимость дальнейшего изучения принципов образования парафиновых отложений на внутренней поверхности нефтепромыслового оборудования.
ГЕОХИМИЯ АУТИГЕННОЙ ПИРИТОВОЙ МИНЕРАЛИЗАЦИИ БАССЕЙНОВ НАМКОНСОН И ФУХАНЬ ЮЖНО-КИТАЙСКОГО МОРЯ ПО ДАННЫМ РЕЙСА 88 «АКАДЕМИК ЛАВРЕНТЬЕВ»
Authors: Калгин Владислав Юрьевич , Якимов Тимур Сергеевич , Федоров Сергей Андреевич , Легкодимов Алексей Александрович , Демина Любовь Андреевна
Published: April 2023

Ссылка для цитирования: Геохимия аутигенной пиритовой минерализации бассейнов Намконсон и Фухань Южно-Китайского моря по данным рейса 88 «Академик Лаврентьев» / В.Ю. Калгин, Т.С. Якимов, С.А. Федоров, А.А. Легкодимов, Л.А. Демина // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.185-194.

Актуальность. В наши дни особое внимание уделяется бассейнам, которые считаются потенциальными на наличие нефте- и газопроявлений. В этом отношении особый интерес проявляется к осадочным бассейнам Намкомсон и Фухань (Южно-Китайское море). В них установлены косвенные признаки глубинной дегазации по рифтовому разлому. Формирование нефти и газа тесно связано с образованием аутигенной сульфидной минерализации. Поэтому все больше вопросов возникает по поводу индикации проявлений нефтегазоностности провинций ассоциациями аутигенных минералов. В связи с этим изучение сульфидов от континентальных до океанических до сих пор является актуальной темой для исследований по всему миру. Цель: исследовать геохимические особенности пиритных образований из донных отложений осадочных бассейнов Намконсон и Фухань Южно-Китайского моря. Методы: масс-спектрометрия с индуктивно связанной плазмой; определение потерь после прокаливания и содержания SiO2 выполнено методом гравиметрии; атомно-эмиссионная спектрометрия с индуктивно связанной плазмой; оптическая и сканирующая электронная микроскопия; рентгеновская дифрактометрия; изотопная масс-спектрометрия. Результаты. Сульфидные образования из данного осадочного бассейна представляют собой агрегаты формы полой трубочки, размеры которых достигают максимум 5 см по длине и 5 мм по диаметру. Также обнаружены крупные сростки в виде ксеноморфных сгустков, сфероидальных образований. Сами агрегаты сложены преимущественно пиритом, присутствуют кварц и альбит. Пирит формирует глобулы и кристаллы формы октаэдра. В пиритных образованиях установлены высокие содержания кобальта (16,5...56,8 г/т), никеля (21,4...377 г/т) и молибдена (20,1...117 г/т). Цериевая аномалия составляет 0,90...0,93 г/т. Изотопные значения δ34S составляют от –32,9 до –47,0 ‰. Данные значения и построенные на их основе генетические диаграммы указывают на гидротермальное происхождение пиритных образований.
ОРГАНИЧЕСКОЕ ВЕЩЕСТВО ДОННЫХ ОСАДКОВ МОРЯ ЛАПТЕВЫХ И ВОСТОЧНО-СИБИРСКОГО МОРЯ: ОБЗОР РЕЗУЛЬТАТОВ ПИРОЛИЗА
Authors: Гершелис Елена Владимировна , Рубан Алексей Сергеевич , Черных Денис Вячеславович , Полтавская Наталина Александровна , Семилетов Игорь Петрович
Published: April 2023

Ссылка для цитирования: Органическое вещество донных осадков моря Лаптевых и Восточно-Сибирского моря: обзор результатов пиролиза  / Е.В. Гершелис, А.С. Рубан, Д.В. Черных, Н.А. Полтавская,  И.П. Семилетов // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2023. – Т. 334. – № 4. – С.149-162.

Актуальность исследования обусловлена необходимостью изучения механизмов трансформации и накопления терригенного органического углерода, высвобождаемого из мерзлотных толщ, на шельфе арктических морей. При переносе в системе «суша–море» он может в дальнейшем накапливаться в донных осадках в шельфовой или глубоководной зоне и подвергаться деградации и реминерализации, что приводит к критическим экологическим последствиям. Цель: установление источников и степени диагенетической преобразованности терригенного органического вещества в поверхностных осадках морей Восточной Арктики. Объектом исследования послужили пробы донных осадков, взятые с поверхностного горизонта (0–10 см). Отбор проб проводился в морских исследовательских экспедициях 2011–2019 гг. Результаты. Латеральная выдержанность значений водородного индекса в современных осадках в море Лаптевых связана с вкладом гетерогенного наземного органического вещества, характеризующегося относительной биогеохимической доступностью: водородонасыщенное наземное органическое вещество сменяется морским с сохранением величины водородного индекса. Это отличает море Лаптевых от других арктических акваторий, где по мере удаления от берега отмечался устойчивый рост значения водородного индекса в связи с усилением вклада автохтонного органического вещества. В соотношении параметров δ13C и HI/OI наблюдаются значительные отклонения от линейной зависимости, характерной для консервативного геохимического режима морских акваторий: терригенный материал в осадках губы Буор-Хая характеризуется легким изотопным составом δ13C и повышенными отношением HI/OI, нетипичным для наземного генезиса. Для органического вещества, накопленного в глубоководных осадках континентального склона, напротив, отмечается низкое содержание водорода и высокая доля кислородсодержащих соединений, свидетельствующих о значительной степени диагенетической преобразованности органического вещества.
Interpretations of Pre-service Elementary Mathematics Teachers on the Functions of Non-Textual Elements: Case Study on Algebra Learning Area
Authors: AKINCI Mustafa , GENÇ Murat
Published: April 2023

The study aimed to investigate how pre-service elementary mathematics teachers perceive the intended use of non-textual elements in an algebra content area of an eighth-grade mathematics textbook. Non-textual elements in this qualitative exploratory case study refer to visual representations consisting of components that are not only verbal, numerical, or symbolic representations. Data were collected from thirty-one undergraduate students through a task-based written questionnaire including seven non-textual elements on the algebra learning domain. Data analysis was conducted using a content analysis approach to generate themes and uncover previously unspecified patterns. The results showed that pre-service teachers’ interpretations of non-textual elements could be categorized into ten themes: (i) attractiveness, (ii) organizing, (iii) embodiment, (iv) informativeness, (v) reasoning, (vi) conciseness, (vii) essentiality, (viii) decorativeness, (ix) contextuality, and (x) connectivity. Pre-service teachers were found to have diverse but sometimes overlapping interpretations of the functions of each non-textual element. However, the functional diversity of non-textual elements may have differentiated their interpretations, as visual literacy skills and strategies are required to interpret the intended use of non-textual elements. Therefore, in order for pre-service mathematics teachers to better understand the functions of non-textual elements, various teaching approaches should be developed to support pre-service teachers’ visual literacy, and these approaches to visual literacy should be incorporated into teacher education and professional development.
The Adaptation Study of The Student Engagement in the General Chemistry Laboratory Scale to Turkish
Authors: ATABEK-YİĞİT Elif , ŞENÖZ Ahmet Burak
Published: April 2023

Chemistry laboratories are an essential and indispensable part of chemistry education; however, the process in the laboratory cannot fully provide the desired gains. Although various scales in the literature address the process in the chemistry laboratory from different perspectives and enable evaluations, a new perspective on the process is student engagement. By determining to what extent and how students engage in the process, the chemistry laboratory can be carried out more effectively, and the efficiency of the teaching process can be increased by making the necessary arrangements. This study aimed to adapt the scale (Smith and Alonso, 2020) from international literature to Turkish and to determine its validity and reliability. For this purpose, the original scale went through the translation phase, and its language validity was checked. The sample of this study consists of 242 students who continue their education in Sakarya University (N= 158) and Gazi University (N=84) Education faculties, Science teaching and Classroom teaching departments. Then its construct validity was ensured by Confirmatory Factor Analysis. Its reliability was studied by determining the internal consistency coefficient. At the same time, the comparison of the data according to some demographic characteristics was also carried out. As a result, The Student Engagement in The General Chemistry Laboratory Scale adapted to our language is a valid and reliable scale consisting of 25 items and six factors.
A text-based approach to developing EFL learners’ intercultural awareness in Higher Education
Authors: ZORBA Mehmet Galip
Published: April 2023

Recent research suggests that learners should be provided with opportunities to negotiate meanings with other cultures and critically evaluate and reflect on their own culture. Texts have a great potential to provide such opportunities, especially in contexts where learners do not have the chance to experience other cultures through real-time observations. This case study investigates what the readers-as-text-ethnographers approach (RaTE) offers to promote intercultural awareness (ICA) in higher education. To this end, seven texts were selected following certain criteria, and a 15-week implementation was designed. Data were collected through learners’ written productions, classroom video recordings, a post-implementation survey, and key informant interviews. Findings revealed that studying texts with the RaTE approach helped the learners develop their ICA in understanding the complexity of culture, otherness, and self. Furthermore, findings also showed that the learners had difficulties in certain areas, such as reading between the lines and textual analysis during the implementation.
The concept of a mobile automated diagnostic and dynamometer station for heavy trucks
Authors: Chojnowski Janusz
Published: April 2023

Trucks are a key element that performs transport functions in many sectors of human activity. This makes ensuring their proper maintenance and performance critical. One of the solutions to this problem is the concept of a mobile automated testing and testing station. A mobile diagnostic and dynometric station based on a 6-foot container was built at the Military University of Technology in Warsaw. This bench is a self-contained unit that can be transported to various locations and carry out on-site testing and diagnostics of heavy trucks. The station is equipped with a fully open system and software that can accurately measure the performance and efficiency of the truck's engine and driveline and enforce specific automated diagnostic processes analogous to quality control tests during the production process. This information can then be used to make informed maintenance and repair decisions, helping to minimize downtime and increase overall vehicle life. The mobile diagnostic and dynamic station also provides a convenient and cost-effective alternative to traditional off-site testing methods, making it a valuable tool for transport companies and fleet managers.
Review of 5-FU resistance mechanisms in colorectal cancer: clinical significance of attenuated on-target effects
Authors: Gmeiner William H. , Okechukwu Charles Chidi
Published: April 2023

The emergence of chemoresistant disease during chemotherapy with 5-Fluorouracil-based (5-FU-based) regimens is an important factor in the mortality of metastatic CRC (mCRC). The causes of 5-FU resistance are multi-factorial, and besides DNA mismatch repair deficiency (MMR-D), there are no widely accepted criteria for determining which CRC patients are not likely to be responsive to 5-FU-based therapy. Thus, there is a need to systematically understand the mechanistic basis for 5-FU treatment failure and an urgent need to develop new approaches for circumventing the major causes of 5-FU resistance. In this manuscript, we review mechanisms of 5-FU resistance with an emphasis on: (1) altered anabolic metabolism limiting the formation of the primary active metabolite Fluorodeoxyuridylate (5-Fluoro-2'-deoxyuridine-5'-O-monophosphate; FdUMP); (2) elevated expression or activity of the primary enzymatic target thymidylate synthase (TS); and (3) dysregulated programmed cell death as important causes of 5-FU resistance. Importantly, these causes of 5-FU resistance can potentially be overcome through the use of next-generation fluoropyrimidine (FP) polymers (e.g., CF10) that display reduced dependence on anabolic metabolism and more potent TS inhibitory activity.