bluuebunny/crossref_metadata_2025 huggingface dataset:
Sustaining Lecturers’ Academic Integrity through the Adoption of Artificial Intelligence in Public Universities in Rivers State
Authors: Aderuyi Precious , Amaewhule Eliphaletphebe Chinyere
Published: September 2024

The study focused on sustaining lecturers’ academic integrity through the adoption of artificial intelligence in public Universities in Rivers State. Four research questions and four corresponding hypotheses were answered and tested in the study. Descriptive survey design was used in the study. The population of the study was 2,874 teaching staff in all the public Universities in Rivers State out of which 351 lecturers were sampled using proportionate stratified random sampling technique. Instrument used for gathering data was a 20 item questionnaire titled “Artificial Intelligence for Sustaining Lecturers Academic Integrity Questionnaire” (AISLAIQ). The questionnaire was face and content validated by an Educational Management expert at University of Port Harcourt while the reliability was estimated using Cronbach Alpha and pronounced an index of 0.82. Out of the 352 copies of questionnaire administered, 336 copies representing 95.7% were retrieved. Research questions raised were answered using mean and standard deviation while the hypotheses were tested using z-test at 0.05 level of significance. The result of the study indicated career progression and lack of competence were the main drivers of academic fraud among the lecturers. The usefulness of AI and the opportunities it provides for personalized learning were among the main factors driving the adoption of AI by the lecturers. Challenges to the adoption of AI and the ways of improving the adoption of AI for sustained academic integrity were identified. The study recommended the need for further AI training for lecturers for sustained academic integrity in the Universities.
Off Grid Collocation Four Step Initial Value Solver for Second Order Ordinary Differential Equations
Authors: Alabi M. O. , Raji M. T , Olaleye M. S
Published: September 2024

The derivation and application of a four step Block Linear Multistep Method is hereby presented. To achieve this, Chebyshev polynomial was employed as basis function. Chebyshev polynomial was adopted as basis function based on its level of accuracy among other monomials in the interval [-1, 1]. Block method was adopted in this presentation based on its accuracy over the popular Predictor – Corrector method. The method under consideration gives solution at each grid point within the interval of integration. The method was arrived at by interpolating the polynomial equation and collocating the differential equation at some selected points. The order and error constant of the method were investigated likewise the consistency and zero stability which is one of the desirability property of linear multistep method were equally investigated. The method was applied to solve some second order ordinary differential equations and compare its level of accuracy with the analytical solution and equally compare its level of accuracy with some other existing methods.
Exploring how Teachers’ Gender Biases and Students’ Self-Efficacy Beliefs Impact Mathematics Instruction
Authors: Yeng Enock , Tatsi Samuel
Published: September 2024

The issue of gender biases among mathematics teachers and the self-efficacy beliefs of students is an intriguing subject. This study sought to explore how teachers' gender biases and students' self-efficacy beliefs impact mathematics instruction in the Adenta Municipality of the Greater Accra Region of Ghana. A sequential explanatory mixed method design was utilized in collecting data from 100 Basic school mathematics teachers and four hundred (400) Junior High School students through a closed-ended questionnaire and semi-structured interview guide. The study discovered that gender-related stereotypes and biases among teachers perpetuated gender-based misconceptions, affecting the self-efficacy of female students who were perceived to be weaker in mathematics. The study recommended comprehensive teacher training and awareness programs to help address gender-related stereotypes and biases in mathematics instruction.
Effect of Amine Additive on Rutting Resistance of Rubberized Asphalt Binder
Authors: Rosnawati Buhari  , Razi Zainal Siti Suhaila , Mohd Kamaruddin Nurul Hidayah , Yunos Khairul Nizam
Published: September 2024

Rutting is the most common distress occurring on asphalt pavement due to traffic increases. Rubberized asphalt was then introduced as potential materials for rutting resistance. However, rubberized asphalt needs a high temperature for mixing and compaction that may not uphold the principle of sustainability. This study focused on modifying the asphalt binder by adding 0.5%, 1.0% and 1.5% of the total asphalt binder with 3-(Triethoxysilyl)propylamine as additive into rubberised asphalt binder to improve rutting resistance. The asphalt binder was tested for penetration, softening point, rotational viscosity and dynamic shear rheometer to ensure conformity to the standard specifications. The results found that incorporating this additive into rubberized asphalt binder improved its physical and rheological properties. By adding 1.5% amine into 5% NR asphalt binder, the viscosity was increased by 56.1%, the highest compared to others while, the binder that containing 0.5% amine shows the lower viscosity and achieve the specification of less than 3000 mPa-s and the G*/sinδ is greater than 1.0 kP at 76°C. In conclusion, asphalt binder containing 0.5% amine could be able to produce asphalt mixture with low mixing and compaction temperature and better rutting resistance.
Optimal Energy Management System in Thailand Convenience Stores
Authors: Thomyapitak Thitiporn , Taweekun Juntakan , Saengsikhiao Piyanut
Published: September 2024

The purpose of this research is to study and investigate the energy consumption and reduction of convenience stores. There is one retail building that is increasing rapidly in Thailand every year, and almost all of them operate 24 hours per day. There is a significant amount of energy consumption. This research is to present an updated energy portion of convenience stores through sampling at 13 stores. These stores have a sales area of 153 to 311 m2 and operating hours of 16 to 24 hours per day. We found that energy consumption recorded from the Digital Energy Meter shows that all of them have cooling systems that use a huge portion of energy (refrigeration and air conditioning systems, 48% and 24%, respectively). Moreover, this research aims to develop a Retail Energy Management System (REMS) to increase the energy efficiency of air conditioning systems at convenience stores in Thailand while still maintaining comfort for occupants by keeping the required temperature at 26 degrees Celsius. We selected 3 of 13 stores that have the same sales area of 280 m2 but different operating hours and numbers of air conditioners. We optimized the operating air conditioning system by data-driven with the Internet of Things system concept, which manages and controls the air conditioning system through the Programmable Logic Control (PLC) program. REMS can reduce energy consumption by 24 and 15 kWh/day, or 14.5% and 8.3%, at operating hours of 24 and 16 hours per day, respectively. There is an average return on investment (ROI) of 3-5 years, depending on the operating hours of the store. In the future, regarding the infrastructure of energy management systems, that can extend to finding some opportunity to save energy consumption in another system, for example, the refrigeration system of their convenience stores.
Modelling of Vehicle Longitudinal Dynamics for Speed Control
Authors: Abdullah Muhammad , Idros Syed , Toha Siti Fauziah , Md Said Mohamad Syazarudin
Published: September 2024

Longitudinal dynamics control is one of the essential tasks for an autonomous vehicle, where it deals with speed regulation to ensure smooth and safe operations. To design a good controller, a simple yet reliable mathematical model is needed so that it can be used as a plant and to tune the controller. Although there are many types of mathematical models available in the literature, finding the right one for control application is essential. The model cannot be too complex and can be too simple. Thus, the main objective of this work is to derive a simple yet reliable vehicle longitudinal model so that it can be used as a simulation plant in MATLAB Simulink to test or tune various types of control algorithm's performance. The model consists of three main parts which are the vehicle body dynamics, simplified power train dynamic, and braking dynamic. To validate the reliability of the model, standard urban drive cycles will be used as a reference speed and a hierarchical PID control structure with inverse plant model is used to control the pedal inputs replacing the driver in simulation environment. Results show that the controller managed to track the drive cycle with an acceptable pedal pressing response which is between 40% throttle press and 20% brake press that in line with the normal operation of a vehicle. Although only simulation result is presented, the model can be used as a good starting point for further development and testing of different types of control algorithms for future work.
Materials Evolution in Dental Implantology: A Comprehensive Review
Authors: Waghmare Gopal , Waghmare Kanak , Bagde Sachin , Deshmukh Mayuri , N. Kashyap Dipti , Shahu Vandita Thantharate
Published: September 2024

This comprehensive review navigates the dynamic landscape of dental implant materials, exploring historical milestones, mechanical intricacies, and emerging innovations. Tracing the evolution from early experimentation to the establishment of titanium as a benchmark, the review sheds light on the critical interplay of strength, elasticity, and fatigue resistance in materials' biomechanical performance. The diverse array of materials, including metals like titanium, ceramics such as zirconia, and polymers like polyetheretherketone (PEEK), is examined in depth, emphasizing their unique attributes and contributions to clinical needs. Surface modifications emerge as transformative elements, accentuating the role of precision engineering in optimizing implant performance. Challenges, encompassing biocompatibility, mechanical incongruity, and infection vulnerabilities, underscore the intricacies of material selection in implant dentistry. The ongoing pursuit of solutions to esthetic limitations and long-term stability constitutes a focal point for future research. Emphasizing the importance of ongoing research, the review highlights emerging materials, such as bioactive ceramics and advanced polymer composites, driven by nanotechnology and 3D printing. Smart implants, antimicrobial surfaces, and regenerative approaches signal a transformative era in precision dentistry. The journey towards refined materials transcends disciplines, uniting researchers, clinicians, and materials scientists in a collaborative pursuit. As the narrative of dental implant materials unfolds, the future beckons with promises of seamless integration with biological tissues, esthetic advancements, and redefined standards in oral rehabilitation. This review encapsulates a dynamic field in continual evolution, extending an invitation to collectively shape the future of dental implantology.
Advancement in Photocatalyst and Piezophotocatalyst Micromotor for Environmental Remediation: A Concise Review
Authors: Hafawati Rosdi  , Mohamed Syazwan Osman  , Huzairy Hassan  , Norain Isa  , Grzegorz Lisak  , Lili Liang
Published: September 2024

This review analyses recent advancements in the synthesis and environmental applications of photocatalysts and piezophotocatalysts, pivotal for organic pollutant degradation and water remediation. Traditional semiconductor photocatalysts often face rapid electron-hole recombination and limited visible light absorption. Innovations have led to the development of semiconductor heterojunctions that enhance photocatalytic efficiency by improving charge separation and expanding light absorption. This review emphasizes semiconductor-semiconductor and semiconductor-metal interfaces, which significantly improve photocatalytic performance. Additionally, piezophotocatalysts have emerged, utilizing mechanical energy to augment chemical reactions, thereby increasing efficiency and applicability under various conditions. The review also highlights the role of photocatalyst-based microrobots in targeted water treatment, utilizing local chemical energy for precise operations. These advancements showcase the potential of photocatalytic and piezophotocatalytic technologies in environmental sustainability, highlighting current trends and future prospects for effective environmental remediation.
Vanadium Aluminium Carbide Saturable Absorber in Passively Q-switched Erbium-doped Fibre Laser
Authors: Wei Ling Ooi  , Azura Hamzah  , Muhammad Amir Fikri Asraf  , Kawther M. Musthafa  , Ahmad Haziq Aiman Rosol
Published: September 2024

Following the success of graphene saturable absorber (SA) in the development of passively Q-switched fibre lasers within the past decade, research on two-dimensional (2-D) nanomaterials SAs have shown a significant rise in demands. Nonetheless, there have been several unavoidable setbacks due to the nature of certain nanomaterials, in terms of optical, electronic and physical properties up until the reveal of transition metal carbide (MXene) nanomaterials. These metal-ceramic materials exhibit excellent optical and electrical properties as well as outstanding physical characteristics. However, their synthesis processes involve hazardous and highly acidic chemicals, which drove the researchers to adopt their precursors— ternary nanolaminate carbides (MAX phases) nanomaterials with a simpler and more exquisite fabrication process. This paper presents a passively Q-switched erbium-doped fibre laser (EDFL) with the utilisation of a MAX phases nanomaterial, vanadium aluminium carbide (V4AlC3) as SA. The V4AlC3 SA was fabricated through the solution casting technique with polyvinyl alcohol as the host polymer. The V4AlC3 SA was then integrated into a passively Q-switched EDFL configuration. The performance of V4AlC3 SA as a Q-switcher was determined with the assistance of an optical spectrum analyser (OSA), mixed domain oscilloscope (MDO), and optical power meter (OPM). The maximum pulse repetition rate and minimum pulse width were 54.37 kHz and 6.43 ms, respectively. The minimum repetition interval was 18.33 ms and the duty cycle was 0.326. The highest attained output power was 2.5 mW. Through calculation, the maximum pulse energy and peak power were identified as 45.246 nJ and 6.602 mW. The extensively gigantic pulses in nanosecond duration at 1560.16 nm was accomplished by the V4AlC3 SA, thus proving its stability which also signifies good applications especially those acquiring stable high power and energy.
Erstnachweise und Wiederfunde verschollener Stechimmenarten (Hymenoptera Aculeata) in Schleswig-Holstein
Authors: Bendixen Uta , Adam Kay , Aldenhoff Peter , Bendixen Lennart , Drews Arne , Gräper Jan , Haack Andreas , Kornmilch Johann-Christoph , Kornmilch Johann-Christoph , Koppitz Christian , Meinecke Philipp , Povel Monika , Schmid-Egger Christian , Schneider-Bujack Andreas , Török Marc , Voigt Norbert , Kuhlmann Michael
Published: September 2024

Especially intensive collecting activities of the AG Stechimmen Schleswig-Holstein during the years 2016-2022 resulted in the discovery of 37 species of wild bees and aculeate wasps (Hymenoptera Aculeata) that
were recorded for the first time in Schleswig-Holstein, Germany, as well as the rediscovery of 19 species that were considered extinct for this region. The newly discovered species are discussed regarding their
known distribution in neighbouring regions. In particular, a strong northward dispersal of thermophilic species can be observed, presumably due to climate warming.
Impacto das Metodologias Ativas no Ensino de Biologia no Ensino Médio
Authors: Silva Jobson de Lima e
Published: September 2024

Introdução: O ensino de Biologia no Ensino Médio enfrenta desafios consideráveis, como a dificuldade de engajar os alunos e a limitação dos métodos tradicionais de ensino. Objetivo: Este estudo busca avaliar o impacto das metodologias ativas no ensino de Biologia, explorando suas diversas abordagens e comparando seus resultados com métodos convencionais. Método: Foi realizada uma revisão integrativa da literatura, englobando estudos publicados entre 2014 e 2024, que discutem a aplicação de metodologias ativas, como sala de aula invertida, aprendizagem baseada em projetos e gamificação. Resultados: As metodologias ativas mostraram-se eficazes em aumentar o engajamento dos alunos, melhorar a compreensão dos conceitos biológicos e promover a aplicação prática dos conhecimentos. Além disso, contribuíram para o desenvolvimento de habilidades críticas e colaborativas, essenciais no aprendizado de Biologia. Conclusões: A implementação dessas metodologias, apesar de seus benefícios, enfrenta desafios como a necessidade de formação contínua dos professores e o acesso desigual a recursos tecnológicos. Portanto, para que essas práticas sejam eficazmente incorporadas no ensino de Biologia, é fundamental que haja investimentos em infraestrutura educacional e suporte pedagógico adequado. O estudo conclui que as metodologias ativas podem transformar positivamente o ensino de Biologia, desde que sejam bem integradas ao contexto escolar.
Tecnologias Digitais no Ensino de Biologia: Ferramentas e Impactos no Aprendizado
Authors: Silva Jobson de Lima e
Published: September 2024

Introdução: Este artigo aborda o uso de tecnologias digitais no ensino de Biologia, destacando sua crescente relevância no contexto educacional moderno. Objetivo: O objetivo deste estudo é investigar os impactos dessas tecnologias no aprendizado, avaliando sua eficácia e os desafios associados à sua implementação. Método: Foi realizada uma revisão integrativa da literatura, analisando estudos recentes publicados entre 2018 e 2024. Resultados: Os resultados indicam que as tecnologias digitais, como jogos educativos, modelos 3D, podcasts e plataformas online, quando utilizadas de forma estratégica e equilibrada, podem enriquecer o ensino de Biologia, promovendo maior engajamento e retenção de conhecimento. No entanto, desafios como a desigualdade no acesso à tecnologia e a necessidade de capacitação contínua dos professores foram identificados. Conclusão: A conclusão destaca a importância de integrar essas tecnologias de maneira cuidadosa, garantindo que todos os alunos possam se beneficiar plenamente dessas inovações.
Structural Improvement in Crane Boom Rest
Authors: Dharan CA Thulasi , Vadivoo U Sudalai , Hussain Basith SA Mohammed , R Pathmarajan , Ganesh P
Published: September 2024

Crane boom rests are critical components that endure both static and dynamic loads, leading to deformation and a shortened lifespan. This paper addresses these issues by proposing a redesigned model with enhanced stiffness and load-bearing capacity. The new design incorporates gussets and Styrene-Butadiene Rubber (SBR) sheets. A series of trials were conducted to analyze various stiffener configurations, with results showing a significant reduction in deformation. The optimal configuration, consisting of three L-shaped stiffeners placed at specific intervals, reduced deformation from 17.2 mm to 2.2 mm. Additionally , the integration of SBR rubber sheets further minimized deformation to 0.15 mm. These modifications demonstrate the effectiveness of the proposed improvements in enhancing the durability and performance of crane boom rests. The findings provide a robust solution for extending the operational life of crane boom rests under dynamic loading conditions. Future research can explore different rubber materials and stiffener designs to further enhance structural integrity and load-bearing capacity.
Recent PC System and its Functions Mastery
Authors: Kutelama Denis , Kongolo Kilikwa , Lubela Lukelwa , Bebe Ngwaba
Published: September 2024

The current living area is refers to as a digital generation simply because of the use of the new technology tools. It is important to master the materials you use. In computing, most people want nowadays to use computers without mastering the basic which goes with it. Indeed, using a computer seems to be easy but since users know some bad sides of a computer, its architecture and functionalities must be understood as well. Although it is said that all computers have several characteristics in common, the differentiation includes one of debated concepts focused in this work. Moreover, as all systems, PCs have a system called ‘‘PC System’’ that people need to know before pretending to use perfectly the computer. It is advised to all computer users that the PC System must be understood entirely for it better usage without which computer usage becomes complex. The present article guide computer users to disclose recent PC System and its functions. This work concerns with, first, the way the PC System is organized, second, different parts of the computer, the way they are connected from one to another and functions are discussed for the better understanding by computer users.
Driving Consumer Choices: The Influence of Pidgin Language in Pepsi Advertising
Authors: O. Osueke Nogzi , P. Kuyet Awokson , S. Ogundoyin Olayinka , O. Christianah Adedeji
Published: September 2024

This study explores the influence of using pidgin English in Pepsi advertisements on consumer purchase decisions. Pidgin English, a creole language widely spoken in various regions, serves as a significant cultural and linguistic marker. The research investigates how incorporating this vernacular into marketing strategies impacts consumer perception, engagement, and ultimately, purchasing behavior. A mixed-methods approach, combining quantitative surveys and qualitative interviews, was employed to gather data from a diverse demographic. Findings suggest that advertisements utilizing pidgin English resonate more deeply with certain consumer segments, enhancing brand relatability and fostering a sense of cultural identity. This linguistic strategy appears to enhance emotional connection and trust, leading to a higher propensity to purchase. The study concludes that leveraging local languages like pidgin can be a powerful tool in marketing, providing brands with a competitive edge in linguistically diverse markets. Implications for marketers include the necessity of cultural sensitivity and the potential benefits of localizing advertising content to reflect linguistic diversity.
The negative impact of social networks on supply chain management: systematic literature review
Authors: Radavičiūtė Gabrielė , Meidutė-Kavaliauskienė Ieva
Published: September 2024

This systematic literature review examines the negative impacts of social media (SM) on supply chain management (SCM). Pre-defined selection criteria were used on four research questions to identify a hundred relevant publications from the Scopus database, including publishers such as Emerald, Elsevier, Springer, Inderscience, and Wiley. The review begins with the first research question – the characteristics of the selected publications. Then, the authors delve into the second question – negative impacts, such as reputational damage, profit losses, and unreliable data. The third question highlights supply chain (SC) processes that are particularly vulnerable to the influence of social media. In addressing the fourth question, the authors identified the most common social networks (SN) discussed in related literature. Despite the comprehensive research, no publication thoroughly explored these four research questions, pointing to gaps for future empirical research. The limitation of focusing solely on English-language literature and other disciplines suggests the need for broader studies. This work deepens understanding of this underexplored area and contrasts the documented positive impacts.
A New Catalog of 100,000 Variable TESS A-F Stars Reveals a Correlation between δ Scuti Pulsator Fraction and Stellar Rotation
Authors: Gootkin Keyan , Hon Marc , Huber Daniel , Hey Daniel R. , Bedding Timothy R. , Murphy Simon J.
Published: September 2024

δ Scuti variables are found at the intersection of the classical instability strip and the main sequence on the Hertzsprung–Russell diagram. With space-based photometry providing millions of light curves of A-F type stars, we can now probe the occurrence rate of δ Scuti pulsations in detail. Using the 30 minutes cadence light curves from NASA's Transiting Exoplanet Survey Satellite's first 26 sectors, we identify variability in 103,810 stars within 5–24 cycles per day down to a magnitude of T = 11.25. We fit the period–luminosity relation of the fundamental radial mode for δ Scuti stars in the Gaia G band, allowing us to distinguish classical pulsators from contaminants for a subset of 39,367 stars. Out of this subset, over 15,918 are found on or above the expected period–luminosity relation. We derive an empirical red edge to the classical instability strip using Gaia photometry. The center where the pulsator fraction peaks at 50%–70%, combined with the red edge, agrees well with previous work in the Kepler field. While many variable sources are found below the period–luminosity relation, over 85% of sources inside of the classical instability strip derived in this work are consistent with being δ Scuti stars. The remaining 15% of variables within the instability strip are likely hybrid or γ Doradus pulsators. Finally, we discover strong evidence for a correlation between pulsator fraction and spectral line broadening from the Radial Velocity Spectrometer on board the Gaia spacecraft, confirming that rotation has a role in driving pulsations in δ Scuti stars.
Abundances of Planetary Nebulae and Evolved Stars: Iron and Sulfur Depletion, and Carbon and Nitrogen Enrichment, in Low- and Intermediate-mass Stellar Populations in the Milky Way
Authors: Stanghellini Letizia , Smith Verne V. , Cunha Katia , Prantzos Nikos
Published: September 2024

We research the elemental abundances in Galactic planetary nebulae (PNe) compared with those of their stellar progenitors (red giant branch and asymptotic giant branch, AGB, stars), to explore and quantify the expected—i.e., due to AGB evolution or condensation onto grains—differences. We gleaned the current literature for the nebular abundances while we used the APOGEE DR 17 survey data for the stellar sample. We examined the elements in common between the nebular and stellar samples, namely, C, N, O, Fe, and S. We confirm that iron in PNe is mostly entrapped in grains, with an average depletion 〈D[Fe/H]〉 = 1.741 ± 0.486 dex, and we disclose a weak correlation between iron depletion and the [O/H] abundance, D[Fe/H] = (6.6003 ± 2.443) × [O/H] + (1.972 ± 0.199). Sulfur may also be mildly depleted in PNe, with 〈D[S/H]〉 = 0.179 ± 0.291 dex. We also found an indication of nitrogen enrichment for PNe 〈E[N/H]〉 = 0.393 ± 0.421 dex, with maximum enrichment (0.980 ± 0.243) occurring for the PNe whose progenitors have gone through the hot-bottom burning. The carbon enrichment is 〈E[C/H]〉 = 0.337 ± 0.463 dex when measured for the general PN populations. Our results will be relevant for future Galactic and extragalactic studies comparing nebular and stellar samples.
Circular Polarization of Simulated Images of Black Holes
Authors: Joshi Abhishek V. , Prather Ben S. , Chan Chi-kwan , Wielgus Maciek , Gammie Charles F.
Published: September 2024

Models of the resolved Event Horizon Telescope (EHT) sources Sgr A* and M87* are constrained by observations at multiple wavelengths, resolutions, polarizations, and time cadences. In this paper, we compare unresolved circular polarization (CP) measurements to a library of models, where each model is characterized by a distribution of CP over time. In the library, we vary the spin of the black hole, the magnetic field strength at the horizon (i.e., both SANE and magnetically arrested disk or MAD models), the observer inclination, a parameter for the maximum ion–electron temperature ratio assuming a thermal plasma, and the direction of the magnetic field dipole moment. We find that Atacama Large Millimeter/submillimeter Array (ALMA) observations of Sgr A* are inconsistent with all edge-on (i = 90°) models. Restricting attention to the MAD models favored by earlier EHT studies of Sgr A*, we find that only models with magnetic dipole moment pointing away from the observer are consistent with ALMA data. We also note that in 26 of the 27 passing MAD models, the accretion flow rotates clockwise on the sky. We provide a table of the means and standard deviations of the CP distributions for all model parameters, along with their trends.
Prediabetes, Dyslipidemia, and Hypertension in Acute Coronary Syndrome Patients: A Cross-sectional Study at a Tertiary Hospital in Cirebon District, Indonesia
Authors: Rachmawan Yogi Puji , Pratiwi Witri , Hanifah Aussie Nenden
Published: September 2024

BACKGROUND: Cardiovascular disease ranks first as the cause of death worldwide, including in Indonesia. Several risk factors, such as prediabetes, dyslipidemia, and hypertension, are known to be associated with an increased risk of cardiovascular disease.
AIM: This study aims to describe prediabetes, dyslipidemia, and hypertension as risk factors in acute coronary syndrome (ACS) patients.
MATERIALS AND METHODS: We conducted a cross-sectional study at a tertiary hospital in Cirebon district, Indonesia. All patients who were hospitalized with ACS from January to December 2021 and met the inclusion and exclusion criteria were enrolled. Secondary data regarding age, sex, risk factors, and type of ACS were collected through patient medical records. Data are presented through tables and graphs.
RESULTS: A total of 60 ACS patients were recruited in this study, most were male (63.3%). Nearly half of the sample had N-STEMI (46.7%). A total of 35% of the sample had prediabetes (35%) and more than half (58.3%) had hypertension. As many as two-thirds of the samples had dyslipidemia. In young ACS patients (≤45 years), 35.8% had prediabetes, 67.9% dyslipidemia, and 56.6% hypertension.
CONCLUSION: Prediabetes, dyslipidemia, and hypertension in ACS patients are the most common risk factors, both young and >45 years old. Early prevention of these risk factors from a young age needs to be prioritized to prevent ACS at a later age.
The genus Coleus (Lamiaceae) in Central Africa (Democratic Republic of the Congo, Rwanda, Burundi), with the description of 15 new species
Authors: Meerts Pierre J. , Paton Alan J.
Published: September 2024

The genus Coleus is revised for DR. Congo, Rwanda, Burundi, based on herbarium taxonomy. Ninety-five taxa are reported (89 species, 1 subspecies, 5 varieties). Fifteen new species and one new variety are described (Coleus duvigneaudii, C. esculentus var. kolweziensis, C. hildei, C. kaminaensis, C. kundelunguensis, C. linarioides, C. lisowskii, C. marunguensis, C. minusculus, C. mitwabaensis, C. mystax, C. pengbelensis, C. piscatorum, C. pseudoschizophyllus, C. ruziziensis and C. zigzag). Fourteen species are newly recorded in DR. Congo and two species are newly recorded in Burundi. Four new combinations are made (Coleus betonicifolius var. kasomenensis, C. esculentus var. densus, C. esculentus var. primulinus and C. parvifolius). Ten names are lectotypified. One name is neotypified. Thirteen new synonyms are reported. Particular attention is paid to the Coleus bojeri complex. Three names are resurrected to accommodate the extensive variation patterns in Central Africa (C. chevalieri, C. collinus and C. heterotrichus); their distribution in Africa is outlined and the circumscription of C. bojeri is amended accordingly. Fifteen taxa are endemic to the study region. A determination key is provided.
High-Temperature Reorganization Behavior of Single-Crystalline Porous 4H-SiC Thin Foils
Authors: Perazzi Marco , Leitgeb Markus , Vengattoor Raghu Appu , Zellner Christopher , Hahn Rainer , Kirnbauer Alexander , Schwarz Sabine , Pfusterschmied Georg , Schmid Ulrich
Published: September 2024

This work reports on the high-temperature reorganization behavior of single-crystalline porous 4H-silicon carbide (4H-SiC) thin foils. Porous 4H-SiC thin foils are realized via state-of-the-art photoelectrochemical etching in hydrofluoric (HF) acid solution enabling for the first time a released foil with a diameter of 2 inches. Subsequent annealing under inert gas atmosphere and comparison between samples suggests that a temperature of 1500 °C allows for various degrees of compactification across the foil surface, whereas at 1600 °C single crystallinity can be preserved.
3D Printing of Urethane Dimethacrylate with Nanoclay for Enhanced Curing Properties via Stereolithography
Authors: Basilia Blessie A. , Boniel Aaron Joshua C. , Borilla III Gerald Son B. , de Yro Persia Ada N.
Published: September 2024

Stereolithography (SLA) is a 3D printing technology that stands out because of its high dimensional accuracy and resolution, excellent surface finish, versatile modification of feedstock chemistry, and low cost of its printers. SLA uses an ultraviolet laser to trace and illuminate a light pattern onto a layer of photocurable resin. However, its disadvantages are the requirement of support structures, use of hazardous resins, the feedstock is limited to curable materials, and the need for a faster curing time. This study aims to improve the curing time of acrylate-based photopolymer resin by adding nanoclay as an additive. Different concentrations of nanoclay, 1wt%, 3wt%, and 5wt%, were added to urethane dimethacrylate, and their curing behavior and mechanical properties were determined. In this study, 3wt% was the ideal concentration since it had better mechanical properties than the control and exhibited the best curing characteristic. This further confirmed that nanoclay is a favorable additive in the 3D printing of acrylate-based photopolymers, solving the concern for fabrication speed and enhancing the mechanical properties of the photopolymer.
Study of Phase Composition and Microstructure of Porous Alumina Ceramics Derived from Hydrothermal Powders
Authors: Shakirzyanov R.I. , Garanin Yuriy A. , Kozlovskiy Artem L. , Shlimas Dmitriy I. , Zdorovets Maxim V. , Zhamikhanova Dilnaz K.
Published: September 2024

Conventional ceramic technology is a widespread technique for synthesizing a large range of materials for household use and engineering applications. However, for advanced technical ceramics different approaches should be used in order to obtain materials with unique physical properties. Despite the well-known technology for the synthesis of alumina-based ceramics, there are a lot of challenges in optimizing manufacturing conditions or integrating the newest technologies. In particular, there are still some challenges in sintering porous bulk ceramics. In this paper, we report on synthesizing mixed-phase porous α-Al2O3 by modernized ceramic technology method. Precursor powders for compaction were obtained by the hydrothermal method in a Teflon vessel. X-ray diffraction and scanning electron microscopy were used to characterize the synthesized samples. It was demonstrated that hydrothermal precursors with chemical residuals make it possible to synthesize porous ceramics with an open porosity of 55–80% and an apparent density of 0.76–1.80 g/cm3. The change in microstructure of sintered samples is explained by precursor powder morphology. The developed approaches can be used in modernized ceramic technology to synthesize porous oxide materials for filters of gases and liquids or refractories.
Chemical Constituents of Black Galingale Rhizome from Hexane Crude Extract and its Nanoemulsion Preparation
Authors: Wongcharu Aoraya , Sonklin Chanikan , Laongtiparos Cherdchai , Pranee Siriporn , Seeyangnok Samitthichai , Trongsiriwat Nisalak
Published: September 2024

Kaempferia parviflora (Black Galingale) is a medicinal plant in the family Zingiberaceae. It has biological activities, but the bioactive compounds are easily decomposed and poorly soluble. This research has focused on the chemical constituents and bioactivities of the hexane crude extract from K. parviflora rhizomes for nanotechnology. The K. parviflora rhizomes were extracted with hexane by the maceration. The crude extract 39.99 g was obtained and purified using column chromatography to give four pure compounds, namely (1) 5-hydroxy-3,7-dimethoxyflavone, (2) 5-hydroxy-7-methoxyflavone, (3) 3,5,7-trimethoxyflavone, and (4) 5,7-dimethoxyflavone. Spectroscopic techniques confirmed the identities of these isolated compounds. Furthermore, compound (1) showed the best antioxidant activities by DPPH assay with an inhibition value of 64.88% compared to standard Trolox with a value of 244.16 ± 4.03 mM, Furthermore, it demonstrated impressive growth of S. aureus and P. aeroginosa. These promising properties suggest its potential for formulation development. 5-hydroxy-3,7-dimethoxyflavone o/w nanoemulsion displayed a transparent apparent yellow color, high stability nanoparticles size of 24.8 nm, and a zeta-potential of -53.2 mV, even after exceeding 3 mounts of storage. The results showed the potential of K. parviflora rhizome extract for nanotechnology applications and its promising future in health and beauty product development for industrial biotechnology processes.
In-Line Charaterization of HPSI SiC Wafers Using High Resolution Surface Photovoltage Spectroscopy (HR-SPS)
Authors: Clausen Thomas , Schüler Nadine , Dornich Kay
Published: September 2024

High purity semi-insulating (HPSI) 4H-SiC wafers from different vendors have been studied by surface photovoltage spectroscopy (SPV). It is demonstrated that the surface photovoltage signal height can be used to discriminate between non-compensated and compensated material, and that the SPV signal is also proportional to the bulk resistivity, at least for non-compensated 4H-SiC material.
Comparison of the Mechanical, Thermal and Structural Properties of Gamma-Irradiated and Conventional SLA 3D Printed Methacrylate-Based Photo-Curable Resin for Biomedical Application
Authors: Sy Jo Ann C. , Basilia Blessie A. , Aranilla Charito T. , Emolaga Carlo S. , Lagura Vivian U. , Margarito Marianito T.
Published: September 2024

This study aims to assess the morphological, thermal, chemical structure and mechanical properties of the gamma-irradiated and conventional (unirradiated) test specimens that were 3D printed using a methacrylate-based photo-curable resin and a stereolithography (SLA) 3D printer. The irradiated test specimens were exposed to 50 kGy gamma-ray dose. The morphological, thermal, chemical structure and mechanical properties of the irradiated and unirradiated test specimens were characterized using the Atomic Force Microscope (AFM), Differential scanning calorimeter (DSC), Thermogravimetric analyzer (TGA), Fourier Transform Infrared Spectrometer (FTIR) and Universal Testing Machine (UTM). Results showed that irradiated test specimens exhibited lower surface roughness compared to the unirradiated specimens. Gamma-irradiated specimens also showed improved tensile strength and modulus of elasticity by 12.2% and 12.4 %, respectively. FTIR, DSC and TGA results showed no significant changes in the chemical structure and thermal properties of the 3D printed methacrylate-based resin after subjecting to gamma irradiation.
Selective reading of 1 Corinthians 14:26–40 resulting in the marginalisation of women
Authors: Resane Kelebogile T.
Published: September 2024

The aim of this paper is to point out a hermeneutic gap in Assemblies of God – Back to God’s order of service where 1 Corinthians 14:26–32 is read, eschewing verses 33–38. It points out the Assemblies of God’s perception of women’s ordination into the ministry, where women are allowed to participate in public worship but are not allowed to take up the pastoral leadership of the local assembly. The research problem is the hermeneutic gap behind refusal to ordain women into the ministry. The selective reading of the Scriptures poses a problem for hermeneutical inclusiveness that embraces social exegesis to arrive at the conclusion that it is not unscriptural to ordain women into pastoral leadership. The conclusion gives the remedial actions of the scenario, to suggest breaking out of a shell, agency and resilience, engaging social exegesis and hermeneutics, and engaging the community through dialogue to justify the rationale for ordaining women into the pastoral ministry in the same par with men.Contribution: Situated within feminist theology, the study on women pastoral leadership is a burning issue for both classical Pentecostals and some of their evangelical counterparts. Pentecostal and charismatic studies should expand their understanding of Pauline theology regarding women’s leadership to arrive at inclusiveness and non-sexism.
Abstract No.: ABS0617: Anaesthesia management of high risk cardiac patients for lower limb vascular surgeries
Authors: Kanzariya Tejas
Published: September 2024

Background and Aims:

Managing Cardiac patients for noncardiac surgery is a daunting task. Haemodynamic disturbances during neuraxial blocks or general anesthesia may worsen the cardiac pathology. Peripheral nerve blocks can prove to be a better alternative in lower limb vascular surgeries.

Methods:

We included 25 high risk cardiac patients posted for lower limb vascular surgeries. Both lumbar plexus and sacral plexus blocks were performed. Haemodynamic monitoring and perioperative new cardiac events were recorded. Any additional supplementation of drugs was also noted.

Results:

Out of 25 patients, 75 patients were male and rest 25 were females. Two patients required additional supplementation with total intravenous anaesthesia. No haemodynamic instability was recorded (table 1). One patient died due to ventricular tachycardia 4 hours after surgery.

Conclusion:

Combined lumbar and sacral plexus blocks resulted as an alternative to neuroaxial blocks or general anaestheisa in patients of high cardiac risk patients undergoing lower limb vascular surgeries.

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Abstract No.: ABS2511: Ultrasound assessment of airway parameters and their clinical correlation to predict difficult airway and laryngoscopy.
Authors: Kataria Anshika
Published: September 2024

Background&Aims:

Increased tongue thickness, pre-epiglottic depth and anterior-neck soft tissue thickness are likely to be associated with difficultairways. This study was aimed to find out various ultrasound airway assessment measurements and their efficacy and correlation with difficult airway and laryngoscopy.

Methods:

A prospective hospital based observational study was conducted at KLEA’s Dr.Prabhakar Kore Hospital and MRC, KAHER, Belagavi, after attaining institutional ethical committee clearance, in 60 adult American Society of Anesthesiologists (ASA)I/II patients undergoing tracheal intubationunder general anaesthesia. Patients with head andneck or cervical spine pathology were excluded. Ultrasonographic assessmentof tongue thickness, ratio of Pre-E/E-VC and anterior neck soft tissue thickness at level of vocal cords weredone with patients in supine position, before induction of anaesthesia. These were compared with Cormack-Lehane grading assessed during laryngoscopy and intubation. These assessments were conducted to investigate the potential predictive value of their combination for difficult laryngoscopy.

Results:

Using Pearson’s correlation, tongue thickness was found to be highly significant in correlation with the Cormack-Lehanegrading along with ratio of Pre-E/E-VC thus to predict difficult laryngoscopy with a significant p value of <0.0001. Thesensitivity of Pre-E/E-VC ratio was found to be 91.67% with a diagnosing accuracy of around 82%.

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Conclusion:

The ultrasound parameters have greater sensitivity and specificity than conventional airway tests. The maximum vertical tongue thickness and ratio of pre-epiglottic space to distance from epiglottis to midpoint-of-vocalcords have better prediction for difficult laryngoscopy.
Abstract No. : ABS2524 : Preventive strategies in chronic persistent postsurgical pain following breast cancer Surgery- A systematic review and meta-analysis,
Authors: Khushboo
Published: September 2024

Background and Aims:

Chronic persistent postsurgical pain(CPCP) following breast cancer surgery is associated with decreased health-related quality of life and additional psychological distress.This meta-analysis aimed to evaluate the effect of various preventive strategies used for reducing the chronic persistent post-surgical pain following breast cancer surgery.

Methods:

An extensive search was conducted on online databases like PubMed, Google Scholar, Science Direct, and Embase. All the relevant randomised controlled trials(RCT) that are published up to June 2021 were included in this review. Patients with breast cancer who have undergone lumpectomy with or without axillary lymph node dissection and modified radical mastectomy were included in the study. The primary outcome measure was pain intensity. Incidence of chronic pain at 3 months using a verbal rating scale (VRS), visual analog scale (VAS), and numerical rating scales (NRS) were compared with control groups. The association between the primary outcome and preventive strategies was assessed using relative risk.

Results:

Incidence of CPSP at 3-month was assessed by 21 RCTs. This meta-analysis included 1610 patients (804 in intervention groups and 806 controls). Intervention reduced the incidence of CPSP at 3-month by 37% as compared to the control group and this reduction was statistically significant [Relative risk: 0.64: 0.54-0.75; p<0.001; I2=24.2%]. There was no publication bias and low heterogeneity among the studies (figure 1).

Conclusion:

In patients undergoing breast cancer surgery, intervention in the form of block or drug reduces the incidences of CPSP at three months post-surgery
Abstract No. : ABS3055 : Comparative evaluation of radiofrequency ablation of genicular nerve and genicular nerve block in patients with osteoarthritis of the knee
Authors: Lather Aditi
Published: September 2024

Background and Aims:

Osteoarthritis of the knee is the most common form of chronic arthritis. There is a mixture of degradative and reparative processes in the articular cartilage and subchondral bone, associated with osteophyte formation and low grade inflammation.

Methods:

Patients were divided in two groups of 30 each. In group-I (n=30), patients received fluoroscope guided radiofrequency(RF) ablation of genicular nerve using RF electrode to a temperature of 60°C for 120 seconds. In Group-II (n=30), patients received fluoroscope guided genicular nerve block using 9ml drug solution comprising of 8ml of 0.5% bupivacaine plus 1ml of methylprednisolone (40mg). Pain was assessed using numerical rating scale (NRS).

Results:

NRS scores were clinically less in group I as compared to group II. There was clinically better patient satisfaction in group I as compared to group II. When Western Ontario and McMaster Universities Osteoarthritis (WOMAC) Index was compared in between the two groups, it was statistically comparable at all time intervals throughout the study period (p>0.05

Conclusion:

Fluoroscope guided radiofrequency ablation of genicular nerve and genicular nerve block with local anaesthetic and steroid are safe and effective techniques for management of symptomatic osteoarthritis of knee. However, fluoroscope guided radiofrequency ablation of genicular nerve is better than fluoroscope guided genicular nerve block in terms of improvement in pain score, physical status and patient satisfaction.