bluuebunny/crossref_metadata_2025 huggingface dataset:
On the uniaxial deformation of nonhomogeneous materials
Authors:   Institute of Solid Mechanics of the Romanian Academy, Bucharest, MOSNEGUTU VALERICA , GIRIP IULIAN ,   Institute of Solid Mechanics of the Romanian Academy, Bucharest, MUNTEANU LIGIA ,   Institute of Solid Mechanics of the Romanian Academy, Bucharest, IOAN RODICA ,   Institute of Solid Mechanics of the Romanian Academy, Bucharest, CHIROIU VETURIA ,   Institute of Solid Mechanics of the Romanian Academy, Bucharest
Published: January 2024

The aim of the paper is to find a parametrical representation for the constitutive laws for which the motion equations can be associated to a pseudospherical surface with negative Gaussian curvature . These constitutive laws suggest the existence of a Tzitzeica surface for which the ratio is constant, where is the distance from the origin to the tangent plane at an arbitrary point.
Sistem for variable pitch vertical axis wind turbine
Authors:   Institute of Solid Mechanics, Romanian Academy, Bucharest, CALIN MIHAITA COSTIN , UNGUREANU LIVIU MARIAN ,   National University of Science and Technology POLITEHNICA, Bucharest, PANDELEA MARIUS ,   Termo-Energetica Instal SRL, ILIESCU MIHAIELA ,   Institute of Solid Mechanics, Romanian Academy, Bucharest
Published: January 2024

Climate changes and their effect worldwide point toward high need of renewable energy resources exploitation and, consequently, adequate policies on regulation for efficient energy consumption. Wind has been used since ancient times for producing energy and this is why research on wind turbine design and performances has been carried on since. This article is aimed to present new mechanical system for variable pitch vertical axis four blades wind turbine. The pitch angle varies depending on wind flow direction due to cam and follower, linked to a four bar mechanism.
Control moment coefficient methodology validation for eVTOL sizing
Authors:   Parvaz Afraz Hava Sanat, Iran, SOLTANMOHMMAD BAHRAM , BOTEZ RUXANDRA MIHAELA ,   École de technologies supérieure ÉTS, University of Quebec, Canada
Published: January 2024

This paper presents a novel approach for the preliminary design of electric Vertical Takeoff and Landing (eVTOL) aircraft that utilizes the new Control Moment Coefficient (CMC) to size electric motors and to determine the rotor location and incidence angle. The CMC is determined for both thrust and arm length in eVTOL aircraft design, and is used to measure the moment produced by the rotors in the roll, pitch, and yaw axes. Analyzing its dimensionless value thus allows insights into an eVTOL aircraft's controllability. To test our methodology, two eVTOL aircraft were used in flight tests, one of which had up to 126% higher CMC values than the other. The results of the flight tests showed that a higher CMC value yielded many benefits, including an increased margin of safety between the rotors and the saturation level, reduced tracking error, and reduced control effort (or energy consumption).Furthermore, the 126% increase in the dimensionless CMC related to the pitch resulted in a 30% increase in the Pulse-Width Modulation - PWM margin of safety of the rotors at the saturated level while still maintaining a reasonable tracking error and a 97% decrease in the pitch control effort. Our research suggests that incorporating higher CMCs into the preliminary design of an eVTOL aircraft can significantly improve its safety and controllability. We hope that our findings will encourage further exploration of this promising approach in future.
IoT data analysis for avalanche forecast
Authors:   Beia Consult International, SEGARCEANU SVETLANA , VATASOIU ROBERT IONUT ,   Beia Consult International, HIJON CARLOS JAVIER PRADOS ,   Amplia Soluciones, Av. Europa 4, 28108, Alcobendas, Madrid, Spain, LOLOIU SORINA ANDREEA ,   Beia Consult International, PETRESCU GABRIEL ,   Beia Consult International
Published: January 2024

In mountainous regions worldwide, avalanches pose a significant hazard to infrastructure and human life. Avalanche identification and prediction have relied on labor-intensive and error-prone human observation and analysis. Artificial intelligence (AI) tools have become a promising means of improving the precision and speed of avalanche detection and prediction in recent years. To address this problem, we are developing an early warning system that utilizes Machine Learning techniques. This article examines the most recent research in AI techniques for avalanche detection and prediction, along with the details of our solution implementation. The system gathers and analyses data from various sensors, including meteorological and auditory sensors, to determine the potential risk of an avalanche. An analysis made on the data collected from the sensors placed in the selected region is also presented. Recent investigations have shown that AI algorithms can identify and forecast avalanches. The article discusses the potential benefits and challenges of implementing an early warning system for avalanches, highlighting the importance of continued research in this area. The research was carried out over 2 years within the MEWS project and is based on the fruitful collaboration between all partners involved in the project. The IoT stations used in the research were located in Norway. The current paper presents an analysis of the data collected in the project and a method for avalanche prediction using Feed Forward Neural Networks.
Crack tip mechanics of multiscale change
Authors:   International Center of Sustainability, Accountability and Eco-Affordability of Large and Small  Lehigh University, Bethlehem PA 18015, USA, von SIH GEORGE
Published: January 2024

Singularity representation at the crack tip and/or smaller region will be considered using six scale transitional physical parameters: three assigned for the nano/micro range (*na/mi, *na/mi, d*na/mi) and three assigned for the micro/macro range (*mi/ma, *mi/ma, d* mi/ma). The subscripts nano, micro, and macro are self-evident. Only the ratio of two successive scale sensitive parameters are needed. Although time dependent physical parameters at the lower scale can be found analytical, they regarded as fictitious, mainly because they are not conducible to measurements. The transitional character of multiscale changes according to nano→micro→ macro with the respective singularity strength of  are given by 1.00/0.75/0.50. Since =0.5 corresponds to the inverse square root r-0.5, where r is the distance from the macro singular point. The micro and nano singular point possess the singularities r-0.75 and r-1.00, respectively. For example, a critical device component may be designed to operate at the nano/micro/macro scale with a life distribution of 2.5+ /3.5+ /5.5+ and total life of 11.5 + years. Progressive changes are assumed to occur in the direction of nano→micro→macro.
Advanced Modeling Approaches for Latent Heat Thermal Energy Storage Systems
Authors:   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda., Eze Val Hyginus Udoka , Tamball John S. ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda.
Published: January 2024

This paper highlights the significance of modeling Latent Heat Thermal Energy Storage (LHTES), temperature-based and enthalpy in an understanding phase transitions, emphasizing their distinct insights based on the specific application. LHTES systems addresses the escalating demand for efficient and environmentally friendly energy management across various sectors. These systems leverage Phase Change Materials (PCMs) to store and release thermal energy during phase transitions, offering significant advantages in terms of energy storage capacity and temperature regulation. This research provides an overview of the methodologies, applications and challenges associated with modeling LHTES systems, which have gained prominence in diverse fields such as phase change modeling, temperature-centric modeling, enthalpy modeling, porous medium approach, conduction-dominated and convection-dominated phase change. This research critically reviewed heat transfer coupled with phase change in simple configurations, exploring fundamental principles and modeling of heat storage units like packed beds. This research finally highlights the crucial importance of modeling underscores its significant role in propelling the development of LHTES technology. These review paper recommended the design and development of accurate, predictive models improve LHTES systems to enhance energy efficiency and reduce ecological impacts across a wide range of applications. Keywords: Phase change materials, Latent Heat Thermal Energy Storage, Packed beds and Porous medium approach
The Effect of Employee Training on Job Performance in Local Governments: A Case of Bukedea District, Uganda
Authors:   Department of Business Administration and Management, Kampala International University, Uganda, Florence Apolot , Emuron Lydia ,   Department of Business Administration and Management, Kampala International University, Uganda
Published: January 2024

This study investigated the influence of employee training on performance in Local Governments, with a focus on Bukedea district. Objectives included establishing the link between training and performance, assessing employed training methods, and gauging the relevance of employee programs. The research utilized a cross-sectional descriptive survey design with 172 randomly selected staff, incorporating both qualitative and quantitative approaches. Data collection involved questionnaires, interviews, and documentary analysis, followed by editing, coding, and analysis using SPSS. Results were presented graphically, revealing a training gap, indicating the absence of pre-training needs assessment and a local government training policy. These deficiencies raised concerns about the effectiveness of training initiatives in enhancing overall performance. Recommendations were made, emphasizing the need for a comprehensive reevaluation of the training process in Bukedea district. This involves conducting thorough needs assessments, establishing a robust training policy, and implementing evaluation mechanisms to enhance the effectiveness of training initiatives, ultimately contributing to improved performance in the Local Government context. Keywords: Employee, Training, Job, Performance and Local Governments
Transformative Potential of Thermal Storage Applications in Advancing Energy Efficiency and Sustainability
Authors:   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda., Eze Val Hyginus Udoka , Robert Oonyu ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda., Sarah Nakitto Immaculate ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda., Tamball John S. ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda., Uzoma Oparaocha Favour ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda., Wisdom Okafor O. ,   Department of Computer Science and Technology, University of Bedfordshire, Luton, England.
Published: January 2024

This article highlights the instrumental role of thermal storage applications in addressing contemporary challenges related to energy efficiency and sustainability. The scope of these applications encompasses a diverse range of innovative solutions dedicated to capturing, storing, and effectively utilizing thermal energy. Notably, thermal storage systems emerge as crucial contributors to curbing energy consumption and mitigating greenhouse gas emissions, especially in critical sectors like heating, cooling, and industrial processes. A key revelation is the ongoing focus on materials such as phase change materials (PCMs) and sensible heat storage mediums. These materials, actively applied in research and practical scenarios, contribute to enhancing thermal storage capacity and efficiency, marking a significant advancement in the field. The exploration of diverse applications spans from leveraging thermal storage for solar energy in residential and commercial buildings to the implementation of district heating systems. Beyond improving energy resilience, these applications play a vital role in reducing peak demand on power grids. An intriguing aspect of the research emphasizes the synergy achieved by integrating thermal storage technologies with renewable energy sources like wind and solar power. This integration holds immense promise for establishing a more sustainable and reliable energy supply. In essence, the findings underscore the transformative potential of thermal storage applications, portraying them as pivotal contributors to steering the transition toward a more sustainable and energy-efficient future. Keywords: Renewable Energy Storage, Thermal Energy Storage, Peak Demand Management, Sustainable Energy Solutions Climate Change, Energy Consumption
Advancements in Energy Efficiency Technologies for Thermal Systems: A Comprehensive Review
Authors:   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda, Eze Val Hyginus Udoka , Tamball John S. ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda, Uzoma Oparaocha Favour ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda, Sarah Nakitto Immaculate ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda, Robert Oonyu ,   Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda, Wisdom Okafor O. ,   2Department of Computer Science and Technology, University of Bedfordshire, Luton, England
Published: January 2024

This comprehensive literature review investigates the diverse landscape of energy efficiency technologies in thermal systems, offering an extensive overview of current research and development in this crucial domain. Thermal systems, vital in industries like heating, ventilation, air conditioning, and industrial processes, play a pivotal role. With escalating global energy demands and growing environmental concerns, optimizing energy use in thermal systems is imperative. The paper explores a wide range of energy efficiency technologies, from traditional methods to cutting-edge innovations, examining the implementation of advanced materials, smart sensors, and control strategies to enhance thermal system performance. Additionally, it scrutinizes the integration of renewable energy sources and waste heat recovery mechanisms, addressing the dual challenge of energy conservation and sustainability. The literature review critically evaluates the economic feasibility and practical applicability of these technologies, highlighting barriers and opportunities for widespread adoption. Synthesizing information from various sources provides a holistic understanding of existing knowledge gaps and future directions in energyefficient thermal systems. This research paper serves as a valuable resource for researchers, practitioners, and policymakers seeking insights into state-of-the-art technologies and strategies to optimize energy utilization in thermal processes. Keywords: Energy efficiency, thermal systems, design optimization, fuels and combustion, boilers and turbines, cogeneration, circulating cooling water systems and heat exchangers
Factors Influencing Successful Implementation of Antenatal Care Services in Selected Health Centre IV’s in Jinja District Eastern Uganda
Authors:   Faculty of Clinical Medicine and Dentistry Kampala International University Western Campus Uganda, Kanya Akankwasa Prosper
Published: January 2024

Maternal mortality is a global public health issue, with an estimated 830 women dying daily due to pregnancy and childbirth-related causes, primarily in the developing world. The use of antenatal care from trained providers is crucial to monitor pregnancy and reduce morbidity and mortality risks for both mother and child during pregnancy and delivery. A prospective descriptive cross-sectional study was conducted among health workers in five health Centre IVs in Jinja district, eastern Uganda. The study found that only 17.65% of antenatal care services were implemented fairly. Factors influencing successful implementation included service duration above five years, formal training on implementing guidelines and having facility interventions in place. Factors such as seeing 30 or fewer antenatal clients on each clinic day, not attending antenatal reproductive health training, not having knowledge of antenatal care guidelines, and not using antenatal care guidelines also influenced successful implementation. However, these factors did not show statistical significance in logistic regression analysis. More efforts are needed to improve antenatal service implementation among healthcare providers to achieve the new WHO antenatal care model for a positive pregnancy experience. Keywords: Women, Pregnancy, Antenatal care services, Antenatal health.
Prevalence of Malaria and Associated Factors among Children Below the Age of 5 Years in Fort Portal Town Kabarole District, Uganda
Authors:   Faculty of Clinical Medicine and Dentistry Kampala International University Western Campus Uganda., Oscar Muhereza
Published: January 2024

Globally, it was noted that over 92 countries and territories have ongoing malaria transmission with an estimated 3.2 billion people who were at risk of getting infected. The WHO indicates that 207 million people are infected with malaria worldwide and of these 627,000 cases result in deaths. Children below five years are the most susceptible to malaria illness which accounts for estimated deaths of 303,000 before reaching age five globally and 292,000 occur in the Africa region. The general objective of the study was to determine the prevalence of malaria and the associated factors among children below 5 years in Fort Portal Town, kabarole district. The study also aimed at determining the socio-economic demographic, caretaker, household, and environment associated with malaria prevalence within the defined age group. The study employed quantitative and qualitative research designs where questionnaires and interview guides were used to collect data from the field. All data was grouped and analyzed in a statistical way where data was presented in tables showing frequencies and percentages. The prevalence of malaria was high 204 (53%) and the factors that were significant with malaria prevalence included; household sources of light and environmental factors about the presence of garbage heaps. The prevalence of malaria was high and it was influenced by the household source of light and garbage heaps around the homes. This study recommended that caretakers should not stop knowing malaria prevention transmission, but should have a positive attitude toward implementing the preventive measures. Health unit workers, community health workers, and VHTs together with stakeholders should put in more effort to ensure that information about malaria is communicated to the caretakers in languages best understood and should mainly target the vulnerable households in the community. The town council authorities and local leaders must work with the community to ensure proper garbage disposal. Keywords: Malaria, Children below five years, Deaths, Garbage Heaps, Caretakers.
Assessment of Overweight, Obesity and Lifestyle-Related Factors Among Women Aged 18-49 Years in Kizinda, Bushenyi District
Authors:   Faculty of Clinical Medicine and Dentistry Kampala International University Western Campus Uganda., Hadson Kkunsa
Published: January 2024

The trend of overweight and obesity was growing with shifts in individual and behavioral factors. Globally, overweight and obesity becoming a major problem, yet extensive data especially in Africa is still lacking. The objectives of the study were to determine the prevalence, socio-economic, and lifestyle-related factors associated with overweight and obesity among women aged 18-49 years in Kizinda in Bushenyi district. A cross-sectional analytical study design was used. Data on prevalence was collected through anthropometric measurements using the BMI (Body Mass Index) while those of socio-economic and individual factors were collected with a structured questionnaire. 271 women aged 18-49 years in Kizinda Trading Center, Bushenyi district were sampled. The prevalence of overweight and obesity among women of reproductive age in Bushenyi town was 47.24% and 19.92% respectively. Housewives were twice as likely to be overweighed and obese [AOR: 2.10, 95% CI (0.87- 3.15)]. Unemployed women have 74% [AOR: 1.26, 95% CI (0.50-2.36)] higher odds of being overweight or obese and those who earn >700000 shillings have 37% [AOR: 1.63, 95% CI (0.56-2.25)] higher odds to be overweight and obese. Compared with women who live in rented houses, those who live in their own houses were 48% [AOR: 1.52, 95% CI (0.78-2.94)] higher odds of being overweight or obese. Women who engaged in physical activity had 65% [AOR: 0.35, 95% CI (0.17-1.27)] less odds of being overweight or obese compared to those who did not. Participants whose food intake is mostly rice and ghee had 55% [AOR: 1.45, 95% CI (0.40-1.27)] and 44% [AOR: 1.56, 95% CI (0.53-2.11)] more odds of being overweight or obese respectively compared to those who take Posho. Women whose food intake was mostly milk were two times [AOR: 2.01, 95% CI (0.55-2.75)] more likely to be overweighed or obese compared to those who take Posho. The high prevalence of overweight and obesity among women of reproductive age in Bushenyi calls for serious attention. Public health interventions through awareness programs about the consequences of overall and abdominal obesity should be implemented. Keywords: Overweight, Obesity, Posho, Women, Housewives.
Unveiling the Dynamics of E-Banking: A Comprehensive Analysis of Strategic Choices, Service Quality and Customer Satisfaction
Authors:   Department of Education Foundations, Kampala International University, Uganda, Eze Chidinma Esther , Eze Val Hyginus Udoka ,   Department of Publication and Extension, Kampala International University, Uganda, Nnenna Ugwu Jovita ,   Department of Publication and Extension, Kampala International University, Uganda
Published: January 2024

This article presents a thorough analysis of strategic decisions in the dynamic realm of electronic banking (ebanking), encompassing ATMs, Internet banking, and mobile banking. Examining varying levels of e-banking sophistication, it explores strategic choices faced by banks, considering critical factors influencing decision-making. Drawing from existing literature, the study delves into dimensions of e-banking service quality, emphasizing the absence of a universally applicable model. The research advocates further exploration for a standardized measurement framework. Additionally, it investigates the evolving role of the Internet in altering customer participation in service delivery, stressing nuanced understanding of service quality. Customer satisfaction is identified as pivotal, with the study establishing a direct link between service quality dimensions and long-term customer relationships. The article also explores perceived service value, highlighting its independent contribution to customer loyalty. Overall, it offers insights into strategic choices in e-banking, emphasizing seamless integration of electronic channels and customer-centric approaches for enhanced service quality and satisfaction in the evolving landscape. Keywords: E-banking, Uganda, Customer satisfaction, Service Quality
On Rheumatoid Arthritis and the Things Most People Don’t Know About It
Authors: Eve Martin Paul
Published: January 2024

I have suffered from rheumatoid arthritis (RA) for almost twenty years now, which is almost half my life. If I had known back at the start of my diagnosis what I know now, I do not know for sure that things would be very different, but there was a heck of a lot I did not know. How complex is this disease and the things it does? This complex: "Rheumatoid arthritis" sounds like the sort of disease that old people get that isn't very serious.
R-universe now builds MacOS ARM64 binaries for use on Apple Silicon (aka M1/M2/M3) systems
Authors: Ooms Jeroen
Published: January 2024

Abstract / TLDR R-universe now provides MacOS arm64 binaries for all R packages.
Scopus: caught-out and shirking responsibility
Authors: Mounce Ross
Published: January 2024

In December last year, it was widely publicized e.g. in

Science

magazine [1], that Scopus has been instrumental in legitimizing publication scams whereby authors pay to bypass real scholarly peer review and have their work published on a website that looks like a real scholarly journal but is in fact not a proper journal, merely an impersonation of one.
Different approach to surfactant screening methods for ASP flooding
Authors: Popić Darko , Pantić Jasna , Tripković Miloš , Martinović Bojan , Antropov Andrej , Crnogorac Miroslav
Published: January 2024

Selection of adequate surfactant is one of the most important steps in preparation for ASP EOR. There are many parameters to be taken in considerations in this process but different authors are prioritizing different parameters. Shown here is comparative analysis of two surfactants chosen according difference set of priorities, in one low IFT and stability and type of created microemulsion was priority (Surfactant A) and in another mobility of created microemulsion (Surfactant B). Bottle test was done with both surfactants to assess the stability of microemulsion at formation temperature, and coreflood test to assess ability of surfactant to mobilize trapped oil. During first round of tests Surfactant A gave better results, very low IFT and stabile Windsor type III microemulsion while Surfactant B gave higher IFT and Windsor type I microemulsion. During coreflood test Surfactant B performed better in terms of oil recovery factor (ORF) and injection pressures. Apparently, stabile Windsor type III microemulsion that is considered desirable in ASP injection and widely prioritized in surfactant selection process can cause decrease in permeability and injectivity issues. Good results can be obtained with IFT in "moderately" low range and stability of microemulsion is not critical in terms of oil recovery factor.
Geological characteristics of the limestone deposit "Dobrilovići"-Loznica and its preparation for use in agriculture
Authors: Kašić Vladan , Mihajlović Slavica , Đorđević Nataša
Published: January 2024

The paper presents the geological characteristics of the limestone of the "Dobrilovići" deposit and the characterization of the trench sample. The technological scheme of limestone preparation, which is used to obtain suitable sizes for use in agriculture, is presented in the paper. Chemical analysis showed the presence of CaCO3 above 80% and CaO above 44.80%. The content of trace metals is low: Cr 21 mg/kg, Pb 3 mg/kg, and Ni 7 mg/kg. The mean value of the loss of ignition is 39.40%, and the pH is 8.47. Based on the obtained results, it was concluded that the chemical and mineral composition of limestone meets the requirements necessary for the calcification of acidic soils. The results of the determination of the granulometric composition showed the dominant presence of large classes above 50 mm (68%). To obtain a class of 100% -2 mm that meets the requirements for application in the calcification of acidic soils, a technological scheme for the preparation of trench limestone is given, which includes crushing, grinding, and grading.
Criteria for evaluation the seismic effect of blasting
Authors: Lutovac Suzana , Gligorić Miloš , Majstorović Jelena , Negovanović Milanka , Jovanović Saša
Published: January 2024

The explosion that caused by blasting is accompanied by the release of a large amount of energy. That energy can be used for rock mass destruction. At the same time, one part of that energy is utilized for rock destruction while the second one gets lost in the rock mass in the form of seismic wave. Regarding that, blasting effects can be divided into two categories such as: useful work and useless work. Useful work is manifested in form of crushing and milling of the rock material in the limited zone around explosive matter and is defined as brisant effect of explosion. Useless work is a phenomenon known as seismic effect of explosion. Useless work is associated with the elastic displacement i.e., the oscillation of the rock mass particles in a very large space around the place of explosion and is felt as a shock. Oscillation velocity of the induced rock mass is most often taken as the parameter for the evaluation the seismic effect of blasting. It is considering that the oscillation velocity best relates and describes the danger of shocks and damages which can be caused, so the appropriate standards for the shock protection are based on the data related to the oscillation velocity. In many countries, regulations that control the shock level caused by blasting activities have been adopted. For our country, these regulations have not yet been adopted, so we used the regulations of other countries to solve these problems. In this paper, criterion of the Institute of Physics of the Earth, Russian Academy of Sciences, criterion according to the Russian standards for mining objects, criterion according to the German standards DIN and criterion according to the USA standards are presented.
Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Authors: Ješić Milica , Martinović Bojan , Stančić Stefan , Crnogorac Miroslav , Danilović Dušan
Published: January 2024

Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, form under specific conditions of low temperature and high pressure. This paper explores the complex process of hydrate formation in gas wells, emphasizing the challenges it presents and the need for specialized strategies to address these issues. The primary focus is a case study of an onshore gas well experiencing recurrent hydrate-related problems. Leveraging PipeSim software, a well model is developed, followed by a sensitivity analysis under various operational scenarios. The study investigates mitigation strategies, including choke position adjustments and methanol introduction, crucial for the safe production of oil and gas fields. The significance of this study lies in its aim to optimize well performance and mitigate risks associated with hydrate formation. Findings contribute to existing knowledge and offer practical solutions for industry practitioners and researchers dealing with onshore gas wells. The paper's structure includes a review of related work, details on the experimental setup and results, and concluding remarks. The perennial challenge of hydrate formation in gas wells necessitates a case-specific assessment and individualized approaches. Nodal analysis and well modeling software have become indispensable tools for engineers in developing preventative measures. This paper presents a methodological approach using a specific well as an example, evaluating the effectiveness of three methodologies: downhole choke installation, methanol dosing, and well transfer to a high-pressure separator.
Influence of natural minerals on contaminated solutions pH values
Authors: Grubišić Mirko , Đorđević Nataša , Mihajlović Slavica
Published: January 2024

The protection and arrangement of agricultural areas in order to obtain health-safe food is extremely important to know the mobility of heavy metals lead, cadmium, zinc and uranium as radionuclides. This research investigated the influence of mineral raw materials (apatite and zeolite) on the mobility of heavy metals and radionuclides in a column system with constant pressure at different pH values (5.0 and 7.0). The tested solutions were contaminated with metals (lead, cadmium, zinc and uranium), in a concentration of 300 mg/l in time intervals of 30, 60, 90, 120 and 180 minutes. It was experimentally determined that there were significant changes in the pH value of the filtrate. The results showed that both apatite and zeolite successfully immobilized lead at both pH values. Uranium immobilization was better performed in columns with apatite, zeolite showed better properties in cadmium immobilization, and tests on a solution contaminated with zinc showed that both apatite and zeolite show similar affinity. The obtained results were statistically processed using the method of two-factor analysis of variance with repeated measurements. Further research will be based on monitoring the morphophysiological properties of underground and aboveground parts of plants on contaminated soil samples when apatite and zeolite are applied.
Exploring the nutritional potential of Camelina sativa genotypes: A study on minerals and bioactive compounds
Authors: Stojanović Zorica , Grahovac Nada , Uletilović Dajana , Kevrešan Žarko , Kravić Snežana , Đurović Ana , Marjanović-Jeromela Ana
Published: January 2024

Camelina sativa is a member of the Brassicaceae family and is characterized as an annual oilseed plant with a short growth cycle. Its seeds offer rich nutritional value comparable with other feed and food sources due to the presence of high-quality oils, protein, essential fatty acids, and bioactive compounds. Our study investigated mineral profile and bioactive compound contents among two different camelina genotypes. The evaluated camelina genotypes NS Zlatka and NS Slatka were developed in Serbia. The bioactive compound investigation included total phenolic and flavonoid contents, chlorophyll a and b, and total carotenoid contents. Furthermore, antioxidant activity was assessed by measuring the DPPH-scavenging capacity of camelina seed extracts. The results demonstrate differences in mineral content between the two genotypes, with variations in sodium, potassium, calcium, magnesium, zinc, iron, manganese, copper, and phosphorus levels. Both genotypes exhibit notable mineral profiles, with particularly high levels of potassium (1007.76-1047.74 mg/100 g) and magnesium (224.09-227.45 mg/100 g), which makes them potentially valuable for both animal feed and human nutrition. Furthermore, analysis reveals substantial levels of total phenolic (8.13-8.16 mg GAE/g DM) and flavonoid (5.91-6.41 mg QE/g DM) compounds in both genotypes, indicating their suitability for applications in the food and pharmaceutical industries. Chlorophyll content analysis demonstrates significant differences between the two genotypes, particularly in chlorophyll a and chlorophyll b levels. These variations suggest differences in photosynthetic capacity and seed maturity. Total carotenoid content remains consistent between the genotypes at levels from 16.43 to 17.91 µg b-CE/g DM, implying similar antioxidant protection mechanisms. Overall, this study provides valuable insights into the biochemical properties of two camelina genotypes, indicating their potential applications in agriculture and human nutrition.
The variation of labile organic matter content following the application of industrial compost in maize production
Authors: Živanov Milorad , Šeremešić Srđan , Vojnov Bojan , Vasin Jovica , Milić Stanko , Ćirić Vladimir , Umičević Predrag
Published: January 2024

This study examined the influence of compost application on alterations in soil organic matter levels and the content of labile organic matter fractions in soil during maize sowing. Due to the lack of organic fertilizers, industrial compost is being investigated as an alternative. The research aims to identify relevant soil quality and fertility indicators and their effects on agricultural production. Short-term compost application as an organic fertilizer may increase the content of labile organic matter fractions in the soil, especially in less fertile plots. The results indicate a significant influence of compost application on soil quality, confirming its role as a nutrient source and enhancer of soil physical, chemical, and biological properties. This highlights its potential for preserving soil quality and supporting agricultural production.
Analysis of economic indicators and application of quantitative methods in planning of seeding
Authors: Eremić-Đođić Jelica , Stojković Suzana , Sedlak Otilija
Published: January 2024

The choice of agricultural crops for sowing and the planning of yields and economic results is realized in conditions of uncertainty and risk. The factors that contribute most to the uncertainty in achieving yields in agricultural production can be quantified using the method of fuzzyfication. The method based on the unique assessment of criteria represents an innovative approach to solving uncertainty in agricultural production. A key feature of this method is its ability to treat criteria as fuzzy scores and to allow their aggregation to make a final yield planning decision. In the paper, 15 main criteria were chosen that influence the planning of yield when sowing sage, nettle and rye. Based on economic indicators, the economic analysis does not numerically describe the impact of uncertainty, which in agricultural production can have an inestimable importance on realized yields and incomes. The method used is a suitable tool for analysis and planning in agriculture, it enables effective treatment of uncertainty and competing criteria, providing farmers with a reliable basis for making decisions about yield planning.
BIM Policy in Eastern Europe
Authors: Mitera-Kiełbasa Ewelina , Zima Krzysztof
Published: January 2024

The European Union in the Industry 5,0 proposal encourages technological transformation. ICT Information and Communications Technology, which for the AEC industry are BIM and Digital Twin is appreciated, but also innovative and variable over time. Therefore publications like this, which verify the validity of information are important. Global BIM policy analysis can be valuable for stakeholders of the investment process, policymakers, researchers. The authors performed a scientific analysis on an extensive database of articles (over 20,000) as well as national regulations (in non-English languages). BIM mandatory in public investments depicted on the map, also charts showing other indicators. In Eastern Europe has been observed a small scale (22%) of planned BIM requirements. Czech Republic plans BIM mandate on public investments for project above the EU threshold. The Polish road map proposes MacroBIM for risky or complicated, public investments with budget exceeding EUR 10 million since 2025 and for all since 2025. Comparing with other indicators the Czech Republic and Poland have high GDP per capita and percentage of the industrial sector (including construction) in GDP value added. Poland is classified also as a developed market within the global equity indices. This may have an impact on digital transformation, which is a demanding project due to investment costs. Bulgaria did not include a BIM mandate in its digital transformations plan. Due to the Industry 5,0 and the positive results from case studies of countries that have already applied BIM mandatory introducing BIM requirements in public procurements should be motivated and supported.
Türkiye’de Kazançlar Üzerine Yaş, Dönem ve Kohort Analizi
Authors: GEMİCİOĞLU Selçuk
Published: January 2024

Bu çalışmada Türkiye işgücü piyasasında ücretli, maaşlı ve yevmiyeli bir şekilde istihdam edilen tüm çalışanlar ile kadın ve erkek çalışanların kazançları üzerinde yaş, dönem ve kohort etkilerinin ayrıştırılması amaçlanmaktadır. Ayrıştırma analizini gerçekleştirmek için Türkiye İstatistik Kurumu (TÜİK) tarafından derlenen 2004-2018 dönemi Hanehalkı İşgücü Araştırmaları’ndan elde edilen mikro veriler kullanılmıştır. Ayrıştırma analizleri yaş, dönem ve kohort (APC) modeli doğrultusunda Deaton (1997) ve Beaudry ve Lemieux (1999)’da önerilen yaklaşımları takiben gerçekleştirilmiştir. Her iki yaklaşıma göre elde edilen bulgular, tüm çalışanlar için yaş ile birlikte kazançların çalışma çağının başında hızlı bir şekilde arttığını, çalışma çağının ortalarında bu artış hızının düştüğünü ve çalışma çağının sonlarında kazançların azaldığını göstermiştir. Daha genç kohortlara (kuşak) kıyasla daha yaşlı kohortların kazançlarının daha düşük olduğu ortaya çıkmıştır. Kazançlar üzerinde dönem (yıl) etkisinin ise sınırlı düzeyde olduğu görülmüştür. Buna ilaveten yaş ve kohortun kazançlar üzerindeki etkisinin cinsiyete göre farklılaştığı ortaya çıkmıştır. Yaşın kazançlar üzerindeki artırıcı etkisinin, erkeklere göre kadın çalışanlarda çok daha erken bir yaşta sonlandığı görülmüştür. Kazançlar üzerinde olumsuz kohort etkisinin ise kadın çalışanlara kıyasla erkekler çalışanlarda daha yüksek düzeyde olduğu saptanmıştır.
TOWARDS 95-95-95: A REVIEW OF THE LAST DECADE OF HIV VIRAL SUPPRESSION IN NIGERIA
Authors: OCHIE KOSSY MARYANN , EZE FAITH NNENNA
Published: January 2024

The United Nations Programme on HIIV/AIDS (UNAIDS) target to achieve 95% viral suppression for all countries remain a challenge for Nigeria. There is a plethora of information on HIV viral suppression. It is therefore imperative that it be reviewed and summarized in a single, comprehensive document. This study reviewed narratively HIV viral suppression studies done within the last decade in Nigeria by retrieving applicable literature from PubMed, Google scholar, and Google Search using relevant keywords. From the review, 16 (50%) of the studies were on rates of viral suppression and factors that influence it while 10 (31.3%) were on interventions to prevent virological failure. Majority of the studies were carried out from 2019-2023 and more than half of the studies reviewed were retrospective (56.3%). Viral suppression in Nigeria is still below the United Nations Programme on HIV threshold of 95 %. However, based on all the efforts put in the last decade, we are on the right track towards achieving the goal by 2030.
SCREENING FOR OXACILLIN RESISTANT SALMONELLA SPECIES ISOLATED FROM PALMS OF SOME PRIMARY SCHOOL PUPILS WITHIN KADUNA SOUTH LGA, NIGERIA
Authors: CHINDO BULUS ANTHONY , WARTU JOSEPH REUBEN , AUTA RICHARD
Published: January 2024

Salmonella species is the causative agent of typhoid fever which is a disease characterized by high mortality and morbidity worldwide. This study was carried out to screen oxacillin resistant- Salmonella species isolated from palms of some primary school pupils and food vendors within Kaduna South LGA, Nigeria. Three hundred (300) swab samples were collected from pupils and food vendors of the three selected primary schools as the sampling location. Salmonella enterica was isolated and identified using standard bacteriological methods. Isolates were susceptible to ciprofloxacin 28 (70.0%), Augmentin® 25 (65.0%) amoxicillin 25 (62.5%) and vancomycin 22 (55.0%) but showed resistance to oxacillin 9 (22.5%), ampicillin 12 (30.0%), chloramphenicol 15 (37.5%) and tetracycline 16 (40.0%). Antibiotics that exhibited intermediate susceptibility were methicillin 8 (20.0%) and gentamicin 11 (27.5%). Ciprofloxacin was the most effective antimicrobial agent against Salmonella enterica. The presence of oxacillin-resistant Salmonella enterica was detected via Polymerase Chain Reaction (PCR) and agarose gel electrophoresis. The study recommends that regular monitoring of antibiotic susceptibility pattern and good hygiene practices such as hand washing with soap and water and the use of alcoholic based hand sanitizers should be encouraged.
ANTIMICROBIAL AND ANTITRYPANOSOMAL ACTIVITIES OF METHANOL ROOT EXTRACT AND FRACTIONS OF BRENANIA BRIEYI (DE WILD) PETIT (RUBIACEAE)
Authors: EZEALA IFEYINWA CHIOMA , UZOR PHILIP FELIX , OBIORA CHARITY UKAMAKA , ENENDU CHIDIMMA MARYANN , ANYADIEGWU CHIDOZIE INNOCENT , NWODO NGOZI JUSTINA
Published: January 2024

Brenania brieyi (Rubiaceae) is used in ethnomedicine for the treatment of malaria, microbial infections, trypanosomal disease, infertility and inflammatory disorders. The study determined antitrypanosomal and antimicrobial activities of extract and fractions of B. brieyi. Cold maceration and solvent-solvent partitioning were used to obtain the extract and respective fractions in order of their increasing polarity: n-hexane, dichloromethane, ethylacetate and absolute methanol. Phytochemical analysis, acute toxicity test and haematological parameters (Packed Cell Volume, parasitemia count) were carried out using standard procedures. Rapid matching and Agar dilution methods were used for antitrypanosomal and antimicrobial studies respectively. The extract (100, 200 and 400 mg/kg), fractions (200 mg/kg) and diminazine aceturate (3.5 mg/kg) were administered per oral. The extract was found to be safe up to 5000 mg/kg. The phytoconstituents present in the plant include tannins, terpenoids, flavonoids, phlobatannins, alkaloids, saponins, cardiac glycosides, quinones, steroids and phenols. The methanol extract of Brenania brieyi (MEBB) root showed significant (p < 0.05) dose-dependent inhibition of parasitemia. Antitrypanosomal activity of the fractions showed that the fractions possess varying degree of parasitemia clearance at 200 mg/kg dose. Methanol fraction produced the highest parasitemia clearance (6.98 ± 0.08 %), followed by n-hexane (7.13± 0.23 %), dichloromethane (7.43± 0.14 %) while ethylacetate fraction (9.00± 0.00 %) caused the least parasitemia clearance when compared with the positive control (0.00± 0.00 %). Haematological parameters and survival time were significantly (p < 0.05) increased, n-hexane fraction exhibited significant (p < 0.05) increase in survival time at 200 mg/kg (after 26 days). Methanol fraction at MICs of 7 to10 mg/ml showed inhibitory activity against Bacillus subtilis, Salmonella typhi, Escherichia coli, Klebsiella pneumonia, Staphylococcus aureus, Streptococcus mutant, Candida albicans and Aspergillus niger. The results obtained revealed that the extract and fractions possess antitrypanosomal and antimicrobial activity. The study provides scientific evidences for the traditional uses of the plant in treating infectious diseases.
EVALUATION OF KNOWLEDGE, PREVALENCE AND EFFECTS OF OPIOID ABUSE AMONG UNDERGRADUATE STUDENTS IN A PUBLIC UNIVERSITY
Authors: OSAHON PENAERE THERESA , ZEKARYAH KARIS ONYINYE
Published: January 2024

In Nigeria currently, opioids are the second most widely used substances among young individuals after cannabis. A review of several literatures reported the prevalence of drug abuse, especially tramadol and codeine, among Nigerian students as 20% – 40%. The aim of this study was to determine the knowledge, prevalence, factors and effects associated with opioid abuse among final year undergraduate students. A cross- sectional study was carried out at a public University. A validated questionnaire was self-administered to 395 respondents. Data obtained were organized and analysed with Microsoft Excel and SPSS version 25. Descriptive statistics was done; frequencies and proportions were used to summarize variables of interest. Chi square test was done for association between variables and opioid abuse. Ethical considerations were observed. A response rate of 98.48% was obtained from the respondents. A total of 101 (26%) respondents used opioids. The most popular opioids abused among the respondents are codeine and tramadol (60 and 63 respondents respectively). A total of 5 respondents used heroin, 3 use pentazocine while only 1 respondent uses oxycodone and morphine. It was observed that majority of the users were males (76%). Peer pressure was the major factor, effects of opioid abuse observed were drowsiness, absence from lectures, examinations and altered daily activities (eating, sleeping and mood). The study revealed a good knowledge of opioid drugs and a high prevalence of opioid abuse among final year students. Tramadol and codeine were the most abused opioids among the respondents. Major effects of opioid abuse were alteration in daily functions and absence from academic activities.