bluuebunny/crossref_metadata_2025 huggingface dataset:
Criminalizing Civil Law Actions of Default into Criminal Acts of Fraud: A Human Rights Perspective
Authors: Yonatan  , Wijayanta Tata , Sugiri Bambang , Sukarmi  , Sulistio Faizin
Published: October 2024

The terms "Default" and "Fraud" and/or “Embezzlement” are often interchanged without clarity of meaning in many discussion forums, both oral and written. This confusion can be seen from the many court decisions that acquit defendants from prosecution which have permanent legal force. The public often hears that law enforcers carry out criminalization, such as witnesses becoming suspects, suspects becoming defendants and so on by shifting the civil legal action of Default to criminal act of Fraud and/or Embezzlement. Using 'criminalization' and 'criminalized' in this article is considered inappropriate, so it has been replaced by 'criminalizing' and 'criminalized'. If there is an action to shift the civil legal act of Default into a criminal act of Fraud and/ or Embezzlement, so from a human rights perspective, it is against the law. By using normative legal research methods, this paper examines how to differentiate civil legal acts of Default from criminal acts of Fraud and/or Embezzlement, how to apply civil compensation in cases where there are already criminal legal remedies, and what is the legal and human rights perspective when criminalization occurs. This paper uses a statutory approach and a case approach. The results show: First, there is a real difference between civil legal acts of Default and criminal acts of Fraud and/ or Embezzlement; Second, the application of compensation can be carried out through criminal and civil procedural law mechanisms; Finally, criminalizing civil legal acts into criminal acts is a form of violation of human rights.
The role of economic freedom in the development of international tourism in Asian countries
Authors: Dang Buu Kiem , Dang Thanh Thuc
Published: October 2024

Purpose ― This paper aims to investigate the influence of economic freedom and its components, namely business freedom and trade freedom, on international tourist arrivals in Asian countries. Additionally, it examines the effect of important macroeconomic factors, such as foreign direct investment, exchange rates, political stability, GDP per capita, and inflation on international tourist arrivals in Asian countries.Methods ― The GMM two-step estimation system is used to analyze data from 25 Asian countries from 1995 to 2020.Findings ― The results show that economic and trade freedom positively influence tourism, while business freedom has a less distinct impact. Inflation positively contributes to tourist arrivals. Exchange rates and political stability show inconclusive effects.Implications ― The study recommends that governments prioritize expanding economic freedom to boost international tourism.Originality ― This is the first study on the impact of economic freedom on developing international tourism in Asian countries.
Management of Tahfidz Quran Programs in Shaping Elementary Students' Character
Authors: Sulastri Sri , Wiyani Novan Ardy , Anam Rif’at Shafwatul
Published: October 2024

The current study intends to analyze the management of the Tahfidz program in shaping students' character. The non-mulazamah program became the subject of the study. A qualitative approach using a case study method was employed in this study. Data collection techniques included interviews, observation, and documentation. Data were generated from the analysis process, comprising data reduction, data display, and conclusion drawing. The results showed that the management of the Tahfidz program was successful in shaping students’ characters based on four indicators. First, in the planning stage, the madrasah conducted a need analysis and prepared stakeholders to ensure proficiency in reading the Qur'an, creating an ideal learning environment. Second, in organizing the Tahfidz program, the madrasah had a clear purpose, well-defined job responsibilities, and adequate facilities to support the program. Third, the Madrasah leaders implemented a situational leadership style during the program's execution. Finally, in the control phase, the management team ensured that the program produced quality outcomes, with many students surpassing the expected targets. The study indicates that the Tahfidz program nurtures students’ characteristics such as discipline, responsibility, independence, and compliance.
Exemplar and Educational Preference: The Influence of Religious Figures on Interest in Islamic Education in Indonesia
Authors: Zubaidi Ahmad , Zerrouki Taha
Published: October 2024

This current research aims to analyse the influence of religious figures on people's interest in choosing Islamic education in the Indonesian context. This study involved 400 respondents from various regions. From the data collected through the survey method, results show that people's perceptions of religious figures significantly influence their interest in choosing an Islamic educational institution. As many as 75% of respondents considered religious figures before deciding to send their child to an Islamic school. This research also revealed that trust in religious figures with a good reputation can increase people's satisfaction with Islamic education. In addition, there is tension between tradition and modernity in Islamic education, which indicates the need to modernize the curriculum to remain relevant to global developments. It is hoped that these findings can be a guide for policymakers in formulating strategies to increase the interest and quality of Islamic education in Indonesia.
Analytical Descriptions of High-Tc Cuprates by Introducing Rotating Holes and a New Model to Handle Many-Body Interactions
Authors: Ishiguri Shinichi
Published: October 2024

This study describes the properties of high-Tc cuprates by introducing rotating holes that are created by angular momentum conservations on a 2D CuO2 surface, and which have a different mass from that of a normal hole because of the magnetic field energy induced by the rotation. This new particle called a macroscopic Boson describes the doping dependences of pseudo-gap temperature and the transition temperature at which an anomaly metal phase appears and describes the origin of the pseudo-gap. Furthermore, this study introduces a new model to handle many-body interactions, which results in a new statistic equation. This statistic equation describing many-body interactions accurately explains why high-Tc cuprates have significantly high critical temperatures. Moreover, a partition function of macroscopic Bosons describes the properties of anomaly metal phase, which sufficiently agree with experiments. Note that, the calculations were conducted, using the result from our previous study that analytically describes the doping dependence of Tc. By introducing a macroscopic Boson and the new statistical model for many-body interactions, this study uncovered the mystery of high- Tc cuprates, which have been a challenge for many researchers. An important point is that, in this study, pure analytical calculations are consistently conducted, which agree with experimental data well (i.e., they do not use numerical calculations or fitting methods but use many actual physical constants).
Empowering Nanostores for Competitiveness and Sustainable Neighbourhoods in Emergent Countries: A GenAI Strategy Ideation Process
Authors: Salinas-Navarro David Ernesto , Vilalta-Perdomo Eliseo , Michel-Villarreal Rosario
Published: October 2024

This exploratory study investigates the use of Generative Artificial Intelligence (GenAI) tools in developing strategy practices for nanostores —i.e., small independent grocery retailers— to enhance their competitiveness while contributing to community sustainability. Nanostores, particularly in emerging countries, face intense competition and rapidly changing trends. By leveraging their proximity to local neighbourhoods, these stores adopt various strategies, such as offering complementary services, integrating technology, and adapting business models. While existing literature highlights the broader economic, social, and environmental roles of nanostores, there is limited comprehensive research on how they may simultaneously contribute to their competitiveness and communities’ sustainability. This study employs a 'thing ethnography' approach, using GenAI tools —i.e., ChatGPT 3.5 and Microsoft Copilot— to explore potential strategy practices for these shops, and reflect on their potential use for strategy ideation and implementation. Key findings suggest that prioritising local sourcing, understanding local preferences, flexible inventory management, efficient retail operations, in-store sustainable practices, promoting healthy lifestyles, and diverse community engagement are crucial for success. However, the study also acknowledges the limitations of GenAI tools, including possible bias and the need for result validation. By aligning with these evolving requirements, nanostores can decisively promote sustainable communities.
Orthopedic Challenges in a Pediatric Case of Congenital Insensitivity to Pain with Anhidrosis (Cipa): A Case Report of 3 Years Old Female Patient
Authors: Gasiņa Liena , Vīksne Artūrs , Ozols Dzintars , Kakar Mohit , Butnere Marisa Maija , Bergmanis Uldis
Published: October 2024

Congenital insensitivity to pain with anhidrosis (CIPA), also known as hereditary sensory and autonomic neuropathy type IV (HSAN IV), is an exceedingly rare genetic disorder characterized by the inability to perceive pain, inability to sweat, and various neurological and orthopedic complications. This is a case report of a 3-year-old female patient diagnosed with CIPA syndrome who presented repeatedly to Children’s Clinical University Hospital (CCUH) in Riga, Latvia with severe orthopedic manifestations. The patient had repeated fractures, several surgeries, and extensive spread of the disease throughout the left leg, which caused significant functional impairment and decreased quality of life. Despite aggressive orthopedic interventions including surgical interventions and physical therapy, the patient's condition remained challenging to manage due to the inherent limitations posed by the insensitivity to pain. The council of doctors discussed the patient's condition and changes, deciding that reconstructive surgery is not feasible, and amputation is recommended. Through this case report, we aim to highlight the unique orthopedic challenges encountered in the management of CIPA patients, emphasizing the importance of a multidisciplinary approach involving orthopedic surgeons, pediatricians, geneticists, and physiotherapists. Additionally, we discuss the need for further research to elucidate optimal management strategies and improve outcomes in this rare and complex patient population.
Response of Chlorophyllase and Magnesium Dechelatase Enzymes in Yellow and Green‐Fleshed Kiwifruit to Degreening at Different Temperatures
Authors: Labra Angeli , Zoffoli. Juan Pablo
Published: October 2024

The kiwifruit cultivars include fruit having a diversity of flesh colors in the range red to yellow to green, associated with specific pigment accumulations. In the yellow-fleshed cultivars, chlorophyll degradation is necessary to unmask the underlying carotenoid pigments, which are responsible for the yellow color. This study aimed to conform the enzymatic activity involved in chlorophyll degradation using different degreening temperatures in the yellow-fleshed kiwifruit (cv. ‘Kiss,’ Actinidia chinensis var. chinensis) and in the contrasting green-flesh kiwifruit (cv. ‘Hayward’, Actinidia chinensis var. deliciosa). ‘Kiss’ was harvested at hue angle 106.9 ° and degreening was carried out at 0, 5, 10 or 15 °C for 41 d. Additionally, one week later, a second batch of kiwifruit was subsequently treated at 30 °C for one week to explore the inhibitory effect on degreening and to elucidate the roles of chlorophyllase and magnesium dechelatase enzymes in the process. Fruit degreened at 30 °C was maintained at 15°C for 23 d afterward and was compared with fruit stored at 0 °C or at 15 °C for 30 d. Similar degreening treatments were applied to cv. ‘Hayward’ at commercial maturity. Every seven days, flesh color, pigment concentrations and the activities of chlorophyllase and magnesium dechelatase in the flesh were evaluated. Degreening of ‘Kiss’ kiwifruit was enhanced by the 15 °C treatment or by 30 °C treatment for seven days and was associated with increasing of carotenoids and decreasing of chlorophyll a. The magnesium dechelatase activity was greater in fruit degreening at 15°C, which was consistently maintained throughout the degreening period; however, the activity remained low at very high temperature (30 °C). Regardless of the above, degreening at 30 °C was not inhibited, showing faster color change and high chlorophyllase activity during the exposure time. In contrast, ‘Hayward’ maintained its green color with high concentrations of the chlorophylls and carotenoids. However, the high chlorophyllase and the low magnesium dechelatase activities found in ‘Hayward’, suggest the chlorophyllase enzymes are not the only ones involved in flesh degreening.
Solidified Salt Melts of the NaCl–KCl–CeF3–EuF3 System as Promising Luminescent Materials
Authors: Zinchenko Viktor , Volchak Ganna , Chivireva Nataliia , Doga Pavlo , Bobytskyy Yaroslav , Ieriomin Oleh , Smola Serhii , Babenko Anton , Sznajder Małgorzata
Published: October 2024

The results of the study of the interaction between the CeF3+EuF3 system and the salt melt NaCl–KCl by spectroscopic methods are presented. It was established that no significant changes occur with CeF3 ions upon dissolution in the NaCl–KCl melt. Instead, the transition of EuF3 into solution-melt, both individually and in the CeF3+EuF3 system, is accompanied by oxidation-reduction reactions with the formation of Eu2+. Diffuse reflection spectra of the samples – both bottom (insoluble sediment) and upper parts of the solidified salt melt in the UV range indirectly indicate the excitation of photoluminescence of Ce3+ and Eu2+ ions. On the other hand, the presence of absorption bands in the near-IR range of the spectrum (1900-2300 cm−1) confirms the preservation of a certain proportion of Eu3+ ions in the salt melt. The influence of various factors (composition of the solidified salt melt sample, excitation wavelength, previous and subsequent heat treatment, and composition of the medium) on the nature of the excitation and emission spectra of the samples was studied. A very intense 5d-4f luminescence of Ce3+ and Eu2+ ions (at 330 and 430 nm, respectively), mainly in the upper part of salt melts, and much weaker 4f-4f luminescence of Eu3+ ions were observed. Certain parameters were optimized to reduce the proportion of luminescence of Ce3+ and, especially, Eu3+ ions and to increase the luminescence of Eu2+ ions. Solidified salt solutions-melts of the NaCl–KCl–CeF3–EuF3 system are promising materials for the creation of solar ultraviolet radiation detectors.
Overview of Clustering Techniques: From k-Means to Spectral Methods
Authors: Montgomery Richard Murdoch
Published: October 2024

This article presents an in-depth overview of clustering techniques, which play a vital role in unsupervised learning by uncovering natural groupings in data. We examine five prominent methods: k-Means, k-Medoids, Kohonen Networks and Self-Organizing Maps (SOMs), Fuzzy C-Means, Hierarchical Clustering, and Spectral Clustering. Each technique is described in detail, including its mathematical foundation, operational mechanism, applications, strengths, and limitations. The goal is to provide a thorough understanding of each approach, helping readers select the most appropriate method for their data analysis needs. Practical examples are also provided, demonstrating the application of these clustering techniques in various real-world contexts such as customer segmentation, image processing, and bioinformatics.
Day-to-Day Fluctuation in Micronutrient Content in Human Milk Relative to Maternal Diet
Authors: Ureta-Velasco Noelia , Montealegre-Pomar Adriana , Keller Kristin , Escuder-Vieco Diana , Serrano José C. E. , García-Lara Nadia Raquel , Pallás-Alonso Carmen R.
Published: October 2024

The impact of daily variations in habitual maternal intake on human milk (HM) composition has been poorly studied. We aimed to investigate the associations between day-to-day fluctuation in the micronutrient concentration in HM and daily maternal diet. To this end, an observational longitudinal study was carried out. A total of 143 lactating women each compiled a five-day weighed dietary record and concomitantly expressed milk for four successive days. Maternal daily intakes of micronutrients and food groups were analyzed. Free thiamine, free riboflavin, nicotinamide, pantothenic acid, pyridoxal, folic acid, cobalamin, ascorbic and dehydroascorbic acids, retinol, alpha- and gamma-tocopherol, cholecalciferol, and calcidiol in HM were determined for each of the four investigated days. A longitudinal data analysis with generalized estimating equation models was performed. For each daily serving of meat, fish, and eggs, total vitamin D3 levels increased by 243.2 pg/mL (p=0.027) and selenium levels increased by 0.16 ppb (p=0.031) in HM. For every 1 mg/day of riboflavin supplementation, free riboflavin levels in HM increased by 28.6 mcg/L (p=0.019). Pyridoxal levels in HM increased by 6.3 mcg/L per 1 mg/day of vitamin B6 supplementation (p=0.001), and by 2 mcg/L per daily fruit ration (p=0.016). In conclusion, observational longitudinal analysis of HM in a sample of lactating women enables the quantification of the impact of diet and habitual supplement intake on day-to-day HM micronutrient variations.
Automatic Multi-Temporal Land Cover Mapping with Fine Spatial Resolution Using the Model Migration Method
Authors: Chen Ruijun , Chen Xidong , Ren Yu
Published: October 2024

Land cover refers to the combination of various material types and their natural characteristics on the Earth. Accurately mapping the spatial distribution and temporal changes of the earth's land cover is of great significance for studying the energy balance and carbon cycle of the earth system. However, there is still a high degree of human participation in the production of multi-temporal land cover products. Developing an automated method for multi-epoch land cover mapping has become a key research focus. To this end, an automatic training sample extraction method was first employed using multi-source prior land cover products. Then, based on the generated training dataset and the Random Forest classifier, local adaptive land cover classification models of the reference year were developed. Finally, by migrating the classification model to the target epoch, the multi-epoch land cover products were generated. Yuli County in Xinjiang and Linxi County in Inner Mongolia were used as test cases. The classification models were first generated in 2020 and then transferred to 2010 to enable automatic classification of multi-temporal land cover. The mapping results showed high accuracy in both regions, with Yuli County achieving 92.52% in 2020 and 88.33% in 2010, and Linxi County achieving 90.28% in 2020 and 85.28% in 2010. Additionally, uncertainty analysis of the model migration method revealed that land types such as water bodies, wetlands, and impervious surfaces, which exhibit significant spectral changes over time, are less suitable for the model migration. Our research can offer valuable insights for fine-resolution land cover mapping. Furthermore, the approach provides a scalable solution for multi-period land cover monitoring, which could facilitate more efficient and accurate environmental assessments.
Comparative Investigation of Traditional Machine Learning Models and Transformer Models for Phishing Email Detection
Authors: Meléndez René , Ptaszynski Michal , Fumito Masui
Published: October 2024

Phishing emails pose a significant threat to cybersecurity worldwide. There are already tools that mitigate the impact of these emails by filtering them, but these tools are only as reliable as their ability to detect new formats and techniques for creating phishing emails. In this paper we investigated how traditional models and transformer models work on the classification task of identifying if an email is phishing or not. We realized that transformer models, in particular DistilBERT, BERT, and RoBERTa had a significantly higher performance compared to traditional models like Logistic Regression, Random Forest, Support Vector Machine, and Naive Bayes.
The process consisted in using a large and robust dataset of emails and applying preprocessing and optimization techniques to maximize the best result possible. roBERTa showed its outstanding capacity to identify phishing emails by achieving the maximum accuracy of 0.9943. Even though they were free successful, traditional models performed marginally worse; SVM performed the best, with an accuracy of 0.9854. The results emphasize the value of sophisticated text processing methods and the possibility of transformer models to improve email security by thwarting phishing attempts.
Clinical application of clinical decision support systems in the management of patients with atrial fibrillation
Authors: Ponomarenko A. V. , Gavrilko A. D. , Gartung A. A. , Poliakova M. S. , Oganesyan A. A. , Benimetskaya K. S. , Losik D. V. , Shalaev S. V.
Published: October 2024

Cardiology, like other branches of medicine, is increasingly faced with the need not only to optimize patient treatment, reduce financial costs, but also to improve long-term outcomes. The volume of information required for such tasks is significant, and a doctor’s time is severely limited. Additional software capable of processing large amounts of data in a short period can assist doctors. Clinical decision support system (CDSS) is a type of software that, based on numerous clinical characteristics, provides doctors with information on the most likely diagnosis, patient risk profile, most suitable therapy, and more. Nowadays, CDSS finding more and more applications in cardiology and cardiovascular medicine. The experience of its clinical use has also been accumulated in the Russian Federation. The problem of the correct choice of anticoagulant therapy remains relevant in clinical practice. In addition, despite the proven benefit of prescribing anticoagulants in patients with atrial fibrillation (AF) at a high risk, the frequency of "underprescription" of oral anticoagulants (OACs) remains relatively high. The introduction of a strategy for a personalized approach to the selection of anticoagulants, based on individual patient characteristics, can significantly improve adherence to clinical guidelines and, as a result, reduce the risk of thromboembolic complications. This article discusses the positive and negative aspects of using CDSS in the management of patients with AF, highlighting the main limitations when using them in conditions close to real clinical practice.
Coagulation disorders in myocardial infarction with nonobstructive coronary arteries
Authors: Pisaryuk A. S. , Filkova A. A. , Tukhsanboev E. S. , Svidelskaya G. S. , Ignatova A. A. , Ponomarenko E. A. , Martyanov A. A. , Tarakanova A. A. , Meray I. A. , Panteleev M. A. , Sveshnikova A. N. , Kobalava Z. D.
Published: October 2024

Aim. To investigate the state of the platelet and plasma components of hemostasis in patients with myocardial infarction with non-obstructive coronary arteries (MINOCA).

Material and methods. The study included 42 patients with non-ST-segment elevation myocardial infarction (NSTEMI): MINOCA (n=24) and MI-CAD (n=18). Platelet aggregation ability in response to activation was evaluated using Solar AP2110 and LASCA aggregometers. Platelet functional activity and calcium signaling were assessed using flow cytometry methods. The plasma component of hemostasis, in addition to routine coagulation tests was evaluated using the global coagulation test "Thrombodynamics". The control groups for tests consisted of healthy volunteers.

Results. When analyzing the ability of platelets to form aggregates by the aggregometry tests, it was found that platelets in the MINOCA group formed aggregates significantly worse upon ADP stimulation at various concentrations compared to the MI-CAD group. However, when platelets were stimulated with collagen, the opposite effect was observed: in the MI-CAD group, there was a noticeable decrease in aggregate formation in terms of light scattering amplitude compared to the MINOCA group. Flow cytometry using the functional platelet activity test protocol revealed that both groups showed a significantly increased platelet size after activation, reduced platelet granularity) both at rest and upon activation, significantly decreased number of procoagulant phosphatidylserine-positive platelets, and reduced dense granule release upon activation compared to healthy volunteers. The calcium signaling test showed a weakened calcium release in response to ADP in the MINOCA group compared to the MI-CAD group. In the study of the plasma component, no significant differences between the groups or deviations were found according to both routine tests and the "Thrombodynamics" test.

Conclusion. Platelet activity did not differ significantly between the MINOCA and MI-CAD groups; however, in the MINOCA group, platelet activity was lower in some tests compared to the MI-CAD group. In the study of the plasma hemostasis component, normocoagulation was recorded in both groups.
The evolution of evidence-based methods of acute myocardial infarction treatment: is there any reason for optimism in recent years?
Authors: Martsevich S. Yu.
Published: October 2024

The article briefly describes the stages of creating the main methods of acute myocardial infarction (MI) and its complications treatment. It is noted that currently existing clinical guidelines (CG) were formed at the end of the first decade of the XXI century; since then there have been no principal changes in the CG due to the lack of fundamentally new approaches to the acute MI treatment, its immediate and long-term outcomes. Compliance with the current CG has significantly reduced hospital mortality in acute MI and improved long-term outcomes. However, today, despite compliance with the CG, the absolute hospital mortality rates for acute MI remain quite high, and the long-term prognosis of patients’ lives is very unfavorable. A number of major randomized clinical trials that ended in 2023-2024 and studied fundamentally new approaches to the treatment of acute MI and its long–term outcomes are analyzed. It is noted that none of these studies gave a positive result. A new study with beta-blockers, which proved its positive effect on the mortality of patients with acute MI in the 80s of the twentieth century, gave negative results. This may indicate that a number of acute MI treatment methods, the effectiveness of which was proven several decades ago, have now lost their significance. It is concluded that despite compliance with modern CG, the residual risk of death after acute MI remains quite high. It is necessary to develop principally new methods of treating this disease.
Novel modular multilevel matrix converter topology for efficient high-voltage AC-AC power conversion
Authors: Saidi F. , Djahbar A. , Bounadja E. , Kacemi W. M. , Fettah K.
Published: October 2024

Introduction. This paper delves into the practical application of multilevel technology, particularly focusing on the capacitor-clamped converter as a promising solution for medium-to-high voltage power conversion, with specific emphasis on direct AC-AC switching conditions. Problem. The limitations of conventional single-cell matrix converters (MC) in efficiency and performance for medium-to-high voltage power conversion applications are well-recognized. Goal. The primary objective is to investigate the performance of the 3 phase modular multilevel matrix converter (3MC) with three flying capacitors (FCs) modeling. This investigation utilizes the Venturini method for gate pulse generation, aiming to compare the performance of the 3MC with standard converter designs. Methodology. To achieve the research goal, the Venturini method is adopted for generating gate pulses for the 3MC, representing a departure from conventional approaches. Detailed simulations employing MATLAB/Simulink are conducted to comprehensively evaluate the performance of the 3MC in comparison to conventional converter designs. Results. The simulation outcomes reveal a significant reduction of 73 % in total harmonic distortion (THD) achieved by the 3MC. This reduction in THD indicates improved robustness and suitability for medium-to-high voltage power conversion systems necessitating direct AC-AC conversion. These results highlight the efficacy of the 3MC in enhancing power conversion efficiency and overall performance. Originality. This paper contributes novel insights into the practical implementation of multilevel technology, particularly within the realm of capacitor-clamped converters. Furthermore, the utilization of the Venturini method for gate pulse generation in the 3MC represents an original approach to enhancing converter performance. Practical value. The research findings present significant advancements in multilevel transformer technology, offering valuable guidance for optimizing transformer design in various industrial and renewable energy applications. These contributions serve to enhance the development of reliable and efficient power systems, addressing critical needs in the energy sector. References 54, tables 3, figures 4.
POTENCIANDO LA AUTOEFICACIA MATEMÁTICA: EXPLORANDO EL IMPACTO TRANSFORMADOR DEL USO DE LA CALCULADORA
Authors: Segarra Escandón Jaime
Published: October 2024

The purpose of this research was to evaluate whether the use of calculators contributes to improving students’ selfefficacy in the subject of Calculus I. The study involved 64 Engineering students, using the Sources of Self-Efficacy inMathematics Scale (SSEMS), a 24-item questionnaire. The participants enrolled in a virtual course that incorporated the topics of Differential and Integral Calculus and the use of the calculator, and the test was taken before and after the course. The results indicate that students experienced a significant increase in their self-efficacy towards mathematics after participating in the virtual course. Therefore, it is suggested that teachers actively promote the use of the calculator in the classroom, since this would facilitate the teaching-learning process.
DOI: http://dx.doi.org/10.21017/rimci.2024.v11.n21.a155
Improving primary health care using digital technologies: methodology for developing tools for assessing "digital maturity" and scientifically based recommendations
Authors:   FSBI National Medical Research Centre for Therapy and Preventive Medicine of the Ministry of Health of the Russian Federation, Voshev D.V.
Published: October 2024

The digitalization of the economy, especially within the framework of the concept of Industry 4.0, has a significant impact on the medical field. In healthcare, digital technologies such as telemedicine technologies, decision support systems and artificial intelligence increase the availability and quality of medical services. The purpose of the study is to develop scientifically based recommendations for improving primary health care using the developed tools for assessing the «digital maturity» of primary care organizations. Materials and methods. To develop recommendations, a methodology was used to assess the «digital maturity» of medical organizations providing primary health care. Experts assessed the indicators of «digital maturity», and their significance was determined through a weighted average. The results of the assessment made it possible to identify the main, additional and excluded indicators, which became the basis for further development of recommendations. Results. Based on the developed methodology, classifications of the levels of «digital maturity» of medical organizations providing primary health care, ranging from low to high levels, were created. These classifications made it possible to identify key aspects that need improvement, including digital infrastructure, information system functionality, the use of artificial intelligence, as well as digital literacy of medical personnel. Conclusions. The digital transformation of primary health care contributes to improving the quality and accessibility of medical services, especially in remote regions. The developed methodology makes it possible to objectively assess the level of digitalization and formulate recommendations for individual digital transformation strategies in the regions of Russia. It is important to continue monitoring and research to assess the long-term effects of digitalization.
Digitalization of the procurement Process as an element of management of a medical organization
Authors:   FSBI AGP V. I. Kulakov of the Ministry of Health of the Russian Federation, Boychuk A. V.
Published: October 2024

In modern conditions, digital technologies are penetrating into all spheres of life, and the healthcare industry is no exception. It is not individual medical services that compete in the market, but financial models. Therefore, those medical institutions that are able to quickly search, test and implement appropriate changes win. Digitalization tools and approaches help you learn to speak the language of value that is created for different target audiences, and regularly update the financial model of a medical institution. A significant stage in the activities of a public health institution is the procurement process. The purpose of the study is to identify the main aspects of building the procurement process of a public health institution through the prism of digitalization of this process within a medical institution. Materials and methods. The study includes the identification of factors that must be taken into account when forming a model of the procurement process; the stages of creating a digital model of the procurement process; the principles of implementing the procurement process project; substantiation of design decisions on information and software for the procurement process of a public health institution; the stages of developing an information system. Methods of structural, functional, information process, causal analysis and modeling are used. Results. The paper identified the main problems associated with the procurement process in medical institutions, including shortcomings in the regulatory framework, the lack of a clear distribution of responsibility between the participants in the process and the inefficiency of management decisions. To improve procurement monitoring and management, a proposal has been developed to optimize the procurement process through the use of digital technologies. Conclusions. The conducted research made it possible to identify the optimization of the procurement process in public medical institutions, which is associated with the use of a digital model of the procurement process. The scope of the results. The results of the work can be used in public medical institutions of various levels to develop and implement a system of digitalization of procurement activities within a medical organization. And also, when optimizing the procurement process in public medical institutions, when using a digital financial model of the procurement process, which has a number of beneficial advantages.
A Novel Method and Correlation for Measuring and Evaluating the Diffusion Coefficients of Gases in Liquids
Authors: Ibeh S. , Jaeger P.
Published: October 2024

Knowledge of the diffusion coefficient of fluid systems is essential for designing and optimizing enhanced oil recovery, fluid separation, and storage processes. In this study, the diffusion coefficients of the gases (CO2 and CH4) in liquids, n-hexadecane, 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM][PF6], and tri-ethylene glycol (TEG) were determined using a newly developed correlation. The correlation was derived by adjusting Fick's equation to the experimental data on liquid droplet diameter obtained from pendant drop tensiometry. It also takes into account the vapour-liquid equilibrium of the liquid-gas system. The experiments were conducted at temperatures ranging from 20°C to 50°C and pressures up to 200 bar in a high-pressure, high-temperature view cell. The diffusion coefficient of the fluid systems increases at higher temperatures and pressures. However, a higher diffusion coefficient, greater than 10-9 m2/s, is determined under relatively lower temperature 30°C, and high pressure (P > 70 bar) conditions in a miscible system, as in the case of the n-hexadecane-CO2 system. The diffusion coefficient values obtained in this work agree with the published data for comparable fluid systems, taking values in the order of magnitude of 10-10 to 10-9 m2/s. However, the results from the Cui et al. (2023) correlation were found to be lower, especially at moderate to low pressures (P ≤ 50 bar), with this work addressing this discrepancy. Additionally, CO2 miscibility with n-hexadecane and the resulting 5.3% greater swelling of the liquid droplets at 30°C and 50 bar compared to CH4 at the same conditions make application of CO2 for enhanced oil recovery favorable. The greater swelling of the ionic liquid [BMIM][PF6] compared to TEG by CO2 under the same temperature and pressure conditions demonstrates increased solubility of CO2 in [BMIM][PF6]. Thus, [BMIM][PF6] has a greater capacity to absorb CO2, making it more effective than TEG in CO2 capture.
Numerical Modelling for Forecasting the Efficacy of Horizontal Wells Equipped with Autonomous Inflow Control Devices
Authors: Mohamed Abdalla , El-Fakharany Taher , Khalid Samir , Mohamed Mustafa , Hegab Hesham
Published: October 2024

The Gulf of Suez Basin contains a lot of fields, most of these fields are suffering from water encroachment. The increasing water cut is posing a major challenge in optimizing the oil production rate. One increasingly popular approach is to use flow control devices (FCD's) that delay water and gas breakthrough into the well. It equalizes the inflow between well bore and completion by providing an extra pressure drop. These Flow control devices can be divided into inflow control devices (ICD's) and Autonomous inflow control devices (AICD's). The thesis describes the first model used in flow control devices for Gulf of Suez wells and the first such technique in Egypt and compare this mode of prediction data with the actual data for horizontal wells already completed and produced from long time back suffered from water breakthrough. The study applied on homogeneous formation with horizontal wells in addition to heterogeneous formation with horizontal wells to evaluate the effects of flow control strategies and technologies on the oil recovery factor of horizontal oil wells with an underlying aquifer using the numerical models. The results reveal that employing of Autonomous inflow control devices (AICD's) allows to produce more oil when compared with using ICD's. According to the findings in two cases, for horizontal wells, production with AICD increased overall oil recovery by roughly 25% when compared to an open hole completion, whereas production with ICD increased the overall oil recovery by around 20% when compared to an open hole completion. The study shows using FCD completion will save more cost through more oil gain and will save also operating cost by reducing the well intervention ways in the well future life. The modelling shows that FCD completion will save around 70 MM $ in horizontal wells. The thesis approved that it is time for Gulf of Suez wells to deploy AICD completion to minimize the operating wells cost.
Flare Recovery Successful Case Study
Authors: Gaber Mohamed Kamal
Published: October 2024

As 60% of electric power is produced of natural gas, capturing flared gas could cover 5% of Egypt's energy needs and add 300 million USD $ to national economy, the introduced solution of flared gas recovery skid is able to recover a flared gas up to 4 Million Standard Cubic Feet Per Day (MMSCFD) against an estimated cost of Million One Hundred And Ten Thousands And Eight Hundred Eighty Eight Million United States American Dollars (USD$) as a fixed cost and existing asset on site to put an end to the bleeding running cost of 1.1 Million United States American Dollars (USD$) / year for power generation in addition to the cost of gas flaring. Moreover producing and saving total electrical power of approximately 10.6 Mega Watt (MW) for the existing sire facilities in addition to reduce the environmental harm impacts of flared gas through cutting the CO2 emissions of more than 27 thousands bounds per hour (lb/hr.) matching with the Climate Change Conference that took place in Sharm El-Sheikh, Egypt (COP 27) and also Climate Change Conference (COP 28) that took place in United Arb Emirates.
Surface Hydration Inhibition Mechanism of Sodium Bentonite Clay of Polyamine Treatment Agents Under High Temperature
Authors: Kiiza Justine , Xu Jiafang , Nangendo Jaqueline , Matamba Musungayi Georges , Damulira Moses , Chen Jie , Wang Xiaohui , Camara Moussa
Published: October 2024

Na-bentonite is one of the most used water-based drilling mud additives due to its unique features for better well integrity. As a hydrophilic clay mineral, it is bound to hydration expansion altering drilling fluids’ properties and causing well instability. Small polyamine treatment agents are often used to avert the hydration of clay minerals, which can minimize the dangers of reservoir damage and wellbore instability. Revealing their inhibition mechanisms is vital for evaluating and designing inhibitor molecules by understanding their molecular behaviour at the sodium montmorillonite (Na-Mnt)–water interface. Herein, the inhibition mechanism of alkyl polyamines of different chain lengths, C5, C7, C12, and C18 was investigated using molecular dynamics (MD) simulation with a particular emphasis on the layering behaviour of alkyl chains, and effects of molecular chain length and temperature on adsorption and hydration inhibition ability. It was observed that the alkyl polyamine formed flat-lying conformation structures along the O-atoms while the amine groups were located mainly over the six-member rings, and the alkyl chains formed monolayers with carbon-chain lengths of C5, bilayers from C7 and C12, and trimolecular layers in C18. The amine groups interacted with the Mnt surface through H-bonds, electrostatic and van der Waals forces, forming organoclays thus reducing interlayer particle mobility as their mobility compared to alkyl chains was slightly less mobile. The distributions of polyamines reduced the amount of layer charge, and C7 gave better inhibition results at 2.553 wt.%. Furthermore, the inhibition stability of C7-diamine on the Mnt surface decreased with increasing temperature. A thorough investigation shows that increasing temperature can lead to desorption, which weakens the interaction between C7-diamine and Mnt, thus reducing adsorption, bonding and inhibition stability. The insights from our present study are beneficial for evaluating the inhibitory performances of organoclays and for the selection and molecular design of new bentonite inhibitors in drilling muds.
Innovative Techniques for Efficient Wireline String Retrieval from Oil and Gas Well Rat Holes
Authors: Sallam Abdalla M. , Selim Ahmed , Ashraf Ali , Maghraby Ahmed , Khalil Ahmed , Kotb Mohamed , Tarek Mahmoud , Hosny Mario
Published: October 2024

In the realm of oil and gas extraction, various well intervention techniques such as slickline, braided line, e-line, and coiled tubing are extensively utilized to maintain and optimize well productivity. Despite their widespread application, these techniques can encounter significant operational challenges. One such challenge is the accidental cutting of the wire at the top of the string, resulting in the string dropping into the rat hole. The difficulty of this situation is exacerbated when the outer diameter (OD) of the dropped string is smaller than the minimum restriction in the completion assembly. The rat hole, an extension of the wellbore below the completion tubing, is typically supported by casing sizes of 7 inches and 5 inches. Retrieving a lost string from a 7-inch casing presents a substantial challenge, particularly when using conventional pulling tools. These tools must have an OD not exceeding 2.55 inches to navigate through completion nipples, yet they often lack the capability to securely engage and retrieve objects from larger casing diameters. This paper introduces an innovative solution: a newly designed pulling tool equipped with an expandable skirt. This tool is engineered to overcome the aforementioned limitations by dynamically adjusting its OD, thereby facilitating the efficient retrieval of lost strings from the rat hole. The expandable skirt mechanism allows the tool to engage objects securely, ensuring successful retrieval operations. The development and deployment of this advanced tool not only enhance the efficiency of well intervention operations but also significantly contribute to maintaining well integrity. By addressing the critical issue of retrieving lost strings in challenging wellbore conditions, this tool extends the operational life of wells and reduces non-productive time. The paper provides a comprehensive overview of the design, functionality, and field application of this tool, demonstrating its potential to revolutionize well intervention practices in the oil and gas industry.
NEAG JG Surprising Results and their Effects on Hydrocarbon Potentiality and Prospects Ranking (Case Study: Lower Cretaceous Bahariya Reservoirs in NEAG JG Field, Abu-Gharadig Basin, Western Desert)
Authors: Salama H. , Mahmoud H. , Sherweid S. , Darwish M.
Published: October 2024

This case study from Bahariya reservoirs in Neag JG serves as a valuable learning lesson for hydrocarbon explorations in any field affected by erosional unconformity surfaces. The objective of this study is to show the new results found by the authors on the top of lower Bahariya reservoirs in Neag JG, knowing that Neag JG is highly affected by the upper cretaceous uplifting and erosion phases of the Syrian arc system.

The area of interest includes two wells penetrated good quality lower Bahariya reservoirs. Well 1X (NEAG JG J2-1), situated in a down-dip structure, encountered two hydrocarbon bearing intervals within lower Bahariya separated by an intra-formational seal, Conversely, well 2X (NEAG JG C5-1), drilled in a distinct structure shallower than Well 1X, yielded water. A comprehensive analysis incorporating the tectonic and stratigraphic activities happened on the top of Lower Bahariya reservoirs and their potential effects were conducted through high-resolution geological, geophysical, and petrophysical methodologies to elucidate the discrepancy: why well 1X exhibited hydrocarbon presence while well 2X did not.

The results were a little bit surprising and interesting, as detailed geological investigations revealed that Well 2X, which yielded water, encountered approximately 100 meters of unfamiliar log responses above the reservoir when compared to all offset wells in Neag-5, JG, and JD fields. This anomalous section is interpreted as comprising slumped materials eroded and transported from adjacent higher elevations, subsequently deposited atop the erosional unconformity surface. This process was responsible for decreasing the top seal quality of the lower Bahariya reservoirs in the up-dip structure. Substantiating this interpretation, bio-stratigraphic analyses conducted on both wells, alongside its identification in seismic sections, provided corroborative evidence.

Following the findings of this study, the top seal emerges as the primary risk factor and must be thoroughly evaluated during the prospect assessment within similar fields encountering erosional unconformity surfaces and affected by the Syrian-Arc system.