bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparing the sensitivity of a low- and a high-resolution mass spectrometry approach for xenobiotic trace analysis: An exposome-type case study
Authors: Flasch Mira , Koellensperger Gunda , Warth Benedikt
Published: June 2023

The chemical exposome consists of environmental exposures experienced throughout a lifetime but to date analytical approaches to investigate the plethora of low-abundance chemicals remain very limited. Liquid chromatography high-resolution mass spectrometry (HRMS) is commonly applied in untargeted exposome-wide analyses of xenobiotics in biological samples; however, human biomonitoring approaches usually utilize targeted low-resolution triple quadrupole (QQQ) mass spectrometry tailored to a small number of chemicals. HRMS can identify novel contaminants over a broad mass range but the detection of molecules from low-level exposure amidst a background of highly-abundant endogenous molecules has proven to be difficult. In this study, a triple quadrupole (QQQ) and a high-resolution mass spectrometer (HRMS) with identical chromatography were utilized to determine the limits of quantitation (LOQ) of >100 xenobiotics and estrogenic hormones in pure solvent and human urine. Both instruments are currently used in exposure assessment studies and were operated in their most frequently used acquisition mode (full scan for HRMS and multiple reaction monitoring for QQQ) to mimic typical applications. For HRMS analyses, the median LOQ was 0.9 and 1.2 ng/mL in solvent and urine, respectively and for low-resolution QQQ measurements, the median LOQ was 0.1 and 0.2 ng/mL in solvent and urine, respectively. To evaluate the calculated LOQs in complex biological samples, spot urine samples from 24 Nigerian females were measured. The higher LOQ values for HRMS resulted in less quantified low-abundance analytes and decreased the number of compounds detected below the LOQ. Even at chronic low-dose exposure, such compounds might be relevant for human health because of high individual toxicity or potential mixture effects. Nevertheless, HRMS enabled the additional screening for exposure to unexpected/unknown analytes, including emerging compounds and biotransformation products. Therefore, a synergy between high- and low-resolution mass spectrometry may currently be the best option to elucidate and quantify xenobiotics in exposome-wide association studies (ExWAS).
Spatiotemporally Controlled Emergence of Nanoparticle Microvortices under Electric Field
Authors: PAN QI , Lin Xijian , Wei Shiyuan , Su Jinghong , Zhao Hansen , Duan Xiaojie , Hu Guoqing , He Yan
Published: June 2023

Controlled assembly of nanoparticles (NPs) has garnered much interest over the past two decades. Beyond established techniques, new methods utilizing local short-range or large-scale long-range interactions remain to be explored to achieve diverse micro- and nanoscale structures. Here, we report the controlled emergence of vortex-pair arrays within monodispersed gold nanorods (AuNRs) by applying a direct current (dc) electric field across a pair of sawtooth electrodes. By employing in situ darkfield microscopy and particle collective analysis, we elucidate the mechanism behind the formation and stabilization of the NP vortices, attributing it to the combined effects of the electrode shape, high NP density, and high solution viscosity. We further explored the controllability of the vortex-pair arrays and obtained multiple complex vortices patterns. Our findings will facilitate the investigation of efficient and controlled dynamic assembly of NPs under external fields and help manufacture next-generation optoelectronic functional materials.
Precise construction of weather-sensitive poly(ester-alt-thioesters) from phthalic thioanhydride and oxetane
Authors: Fornacon-Wood Christoph , Stühler Merlin , Gallizioli Cesare , Manjunatha Bhargav , Wachtendorf Volker , Schartel Bernhard , Plajer Alex
Published: June 2023

Future materials require improved environmental degradability compared to current state-of-the-art variants while remaining stable under thermal processing conditions. Owing to the chemistry of sulfur, polythioesters could grant such advantages yet their synthesis remains challenging. Here we report the selective ring opening copolymerisation (ROCOP) of oxetane and phthalic thioanhydride by a heterobimetallic Cr(III)K catalyst precisely yielding semi-crystalline alternating poly(ester-alt-thioesters) with a high Mn,max = 139 kg/mol which is crucial for maximising thermal stability and tensile strength of the resulting materials. We also find heterometallic cooperativity to be key to achieve productive catalysis. Although the high Mn material shows excellent thermal stability, the regularly distributed thioester-links in the polymer backbone act as photolytic and oxidative breaking points. Investigating its primary degradability as plastic litter in central Europe, artificial weathering experiments reveal improved degradation over current commodity semi-aromatic polyester due to the thioester links in the polymer backbone.
Concise synthesis of (±)-fortuneicyclidins and (±)-cephalotine B enabled by Pd-catalyzed dearomative spirocyclization
Authors: Uwabe Yota , Muto Kei , Yamaguchi Junichiro
Published: June 2023

Total syntheses of C11-oxygenated Cephalotaxus alkaloids, fortuneicyclidins A and B, and cephalotine B, were achieved. The key for the synthesis is a Pd-catalyzed dearomative spirocyclization of bromofurans with N-tosylhydrazones, followed by acid-mediated tandem transformation to construct the tetracyclic skeleton with the C11-oxygen functional group. Chemo-selective and catalytic functional group conversions of the tetracyclic intermediate completed the synthesis of fortuneicyclidins and cephalotine B in 8 and 9 steps, respectively.
Exploiting Grain Boundary Diffusion to Minimize Dendrite Formation in Lithium Metal-Solid State Batteries
Authors: Yoon Jeong Seop , Sulaimon Hafeez , Siegel Donald J.
Published: June 2023

Maintaining interfacial contact between the Li metal anode and the solid electrolyte is a key challenge in developing Li metal-based solid-state batteries (LMSSB). At moderate discharge rates, relatively slower diffusion within the anode results in roughening and void formation in Li near this interface. The resulting reduction in interfacial contact focuses the Li-ion current during plating to a reduced number of contact points, generating high local current densities that nucleate dendrites. One approach to minimize void formation is to apply high stack pressure, which enhances plastic flow in the anode. Nevertheless, the use of pressure has drawbacks, as it facilitates fracture within the solid electrolyte. Here, an alternative strategy for minimizing void formation is described. Using a multiscale model, it is shown that targets for capacity and current density in LMSSBs can be achieved by reducing the grain size of Li, thereby exploiting fast grain boundary (GB) diffusion. Diffusion rates along a diverse sampling of 55 tilt and twist GBs in Li was predicted using molecular dynamics, and found to be 3 to 6 orders of magnitude faster than in the bulk. Using these atomic-scale data, a meso-scale model of Li depletion in the anode during discharge was developed. The model predicts that grain sizes of approximately 1 𝜇m are needed to meet performance targets for LMSSBs. As these grain sizes are two orders of magnitude smaller than those in common use, strategies for controlling grain size are discussed. In total, the model highlights the importance of the anode’s microstructure on the performance of LMSSBs.
An Introductory Review on Advanced Multifunctional Materials
Authors: Abdelhamid Hani Nasser
Published: June 2023

This review summarizes applications of some of the advanced materials. It included the synthesis of several nanoparticles such as metal oxide nanoparticles (e.g., Fe3O4, ZnO, ZrOSO4, MoO3-x, CuO, AgFeO2, Co3O4, CeO2, SiO2, and CuFeO2); metal hydroxide nanosheets (e.g., Zn5(OH)8(NO3)2·2H2O, Zn(OH)(NO3)·H2O, and Zn5(OH)8(NO3)2); metallic nanoparticles (Ag, Au, Pd, and Pt); carbon-based nanomaterials (graphene, graphene oxide (GO), reduced graphene oxide (rGO), graphitic carbon nitride (g-C3N4), and carbon dots (CDs)); biopolymers (cellulose, nanocellulose, TEMPO-oxidized cellulose nanofibers (TOCNFs), alginate, and chitosan); organic polymers (e.g. covalent-organic frameworks (COFs)); and hybrid materials (e.g. metal-organic frameworks (MOFs)). These materials were applied in several fields such as environmental-based technologies (e.g., water remediation, air purification, gas storage), energy (production of hydrogen, dimethyl ether, solar cells, and supercapacitors), and biomedical sectors (sensing, biosensing, cancer therapy, and drug delivery). They can be used as efficient adsorbents and catalysts to remove emerging contaminants such as metals, dyes, drugs, antibiotics, pesticides, and oils in water via adsorption. They can be also used as catalysts for catalytic degradation, reduction, and oxidation of organic pollutants. They can be used as filters for air purification by capture greenhouse gases such as carbon dioxide (CO2) and volatile organic compounds (VOCs). They can be used for hydrogen production via water splitting, alcohol oxidation, and hydrolysis of NaBH4. Biomedical 2 applications such as antibacterial, drug delivery, and biosensing were also reviewed.
1957: El proletariado invade Santiago
Authors: Thielemann Luis
Published: June 2023

En abril de 1957 se produjo una revuelta social de magnitudes inéditas en la historia de Chile. La proporción de la población involucrada fue inmensa, y partes importantes de la ciudad se vieron por horas y hasta días, fuera de control del Estado. El alba del Santiago metropolitano se iluminó con barricadas en llamas, que no eran sino las señales de la lucha callejera, los saqueos, incendios, y finalmente los fogonazos de las carabinas, fusiles y ametralladoras de policías y militares. Seis meses después, en la zona sur de la ciudad, donde Santiago paulatinamente se iba disolviendo más allá del Zanjón de La Aguada, miles de familias pobres sin casa, ocuparon y se tomaron la ex chacra La Feria, y desde ahí fundaron la actual población La Victoria. Ambos hechos son precipitaciones de procesos complejos de radicalización y politización popular. En conjunto, los hechos del año 1957 conforman un hito de ruptura y salto estratégico en la composición histórica del universo proletario de Santiago.
Topic diffusion prediction on bibliographic network: effect of topic modeling on activation probability measure
Authors: Ho Thi Kim Thoa , Bui Quang Vu
Published: June 2023

In this research, we propose using topic modeling to estimate activation probability for predicting topic diffusion on the bibliographic networks. We utilize the supervised method to predict the propagation of a specific topic. We propose a new method to calculate activation probability for an active node and an inactive node based on the meta-path and textual information using topic modeling. Firstly, based on textual information, topic modeling is suggested to measure activation probability, namely the textual information. Secondly, combining the meta-path and textual information, we propose a new method to estimate activation probability, namely the aggregated activation probability, in which the textual information is measured by topic modeling. We conduct experiments on dissimilar topics of the bibliographic network datasets. Experimental results demonstrate that topic modeling improves the accuracy of diffusion prediction compared with term frequency–inverse document frequency.
Effects of vitamin D deficiency on bone and root resorption post-orthodontic retention in rats
Authors: Khamees Asmaa M , Al Groosh Dheaa H , Al-Rawi Natheer H
Published: June 2023

Background: Orthodontic therapy often causes external root resorption. Serum vitamin D (VD) level is important for tooth mineralization and bone remodeling. This study aimed to test the impact of vitamin D (VD) supplements on bone and root remodelling in a vitamin D (VD) deficient rat model following orthodontic retention. Methods and Material: 30 male Wistar rats were divided into three groups: a control group of 10 rats and two experimental groups of 10 rats each with vitamin D deficiency (VDD) induced by a VD-free diet for 21 days. And a third group with VD supplementAll groups received orthodontic active treatment using a modified orthodontic appliance that applied 50 gm of force for 14 days to move the maxillary right first molar mesially, followed by 7 days of retention and relapse. The VDD group received no intervention, while the VDS group received 40,000 IU/kg of systemic VD3 by intramuscular injection on the first and fifteenth day of orthodontic treatment. Histomorphometric analysis was performed to assess bone and cementum resorption and deposition. Results: The VDD group exhibited a significant increase in bone and root resorption and a decrease in bone deposition and ce-mentum deposition ratio. In addition, bone deposition and the ratio of cementum deposition were substantially greater in the VDS group compared to the control group. Conclusion: VDD may increase bone and root cementum resorption and decrease deposition after orthodontic retention, which may play a significant role in relapse after retention. Prior to beginning orthodontic treatment, routine VD screening may be beneficial.
Asessing Student Teachers’ Ability in Constructing Mathematical Reasoning Problems
Authors: Masriyah  , Kohar Ahmad Wachidul , Rahaju Endah Budi , Fardah Dini Kinati , Hanifah Umi
Published: June 2023

Assessing student teachers' skills in posing mathematical reasoning problems within their experiences in teacher education is essential due to the increasing challenges for them to prepare for 21st-century learning. This study aims at investigating the quality of mathematical reasoning problems posed by student teachers. As many as 34 student teachers who attended an assessment lecture posed mathematical problems, where the three aspects; suitability of indicators with problems posed, the plausibility of the solution, the correctness of the solution, and language readability were used to assess the problems posed. Results indicate that more than 70% of the student-teacher participants were successful in posing reasoning problems—either objective or subjective questions—indicated by those which are in accordance with the established criteria although most of the posed problems are categorized as “analyze” problem, instead of “evaluate” or “create” problem.
Inclusive Teaching Practices with Learners with Dyslexia: Face-To-Face Training-Induced Changes in Foreign Language Teachers’ Self-Efficacy Beliefs, Concerns and Attitudes
Authors: Nijakowska Joanna
Published: June 2023

The survey research reported in this paper aimed to show how foreign language teachers’ (N = 69) self-efficacy beliefs and concerns related to implementing inclusive instructional practices with learners with dyslexia, as well as their attitudes to inclusion in foreign language education, change as a result of the teachers’ participation in an intensive face-to-face course on dyslexia and foreign language teaching. The pre-post comparisons identified a statistically significant improvement in self-efficacy beliefs and attitudes, with large and medium effect sizes, respectively, as well as a decrease in concerns, with a small effect size. Moreover, the perceived level of knowledge of dyslexia reported by course participants after the course increased significantly compared to pre-course knowledge, with a large effect size. The perceptions of knowledge were crucially related to pre-course self-efficacy beliefs and concerns, as well as to post-course self-efficacy beliefs. The impact of several background variables on self-efficacy beliefs, concerns and attitudes was investigated. We found no significant effects of general teaching experience, experience in teaching learners with dyslexia, teaching context (country), full-time employment and level of education on self-efficacy beliefs and attitudes both before and after the course. The initial effect of previous training on self-efficacy beliefs disappeared in the post-course questionnaire. No significant effects of previous training were observed for pre-course and post-course concerns and attitudes. The initial effect of level of education and experience in teaching a foreign language to learners with dyslexia on concerns disappeared in the post-course questionnaire. Teaching context (country) and full-time employment differentiated participants with regard to how concerned they were about implementing inclusive teaching before the course, and these differences persisted after the course. Age differentiated participants in the attitudes to inclusion they held before the course, but this difference disappeared after the course. Finally, teacher trainers differed significantly from other course participants regarding pre-course self-efficacy and post-course concerns, with a small to medium effect size.
Slovenian Language Teachers’ Attitudes Towards Introducing Comics in Literature Lessons in Primary School
Authors: Kerneža Maja , Saksida Igor
Published: June 2023

The present article highlights the views of Slovenian language teachers on the introduction of comics in literature lessons in primary school. We were interested in Slovenian language teachers’ views on the introduction of comics as an art-literary type of text as part of the literature curriculum as well as the use of comics as a literary-didactic method in literature classes. This was investigated via a questionnaire, which was fully completed by 121 Slovenian language teachers of the first to the ninth grade. The results show that factors such as gender, educational period taught, professional experience, field of study, highest level of completed education, source of skills related to the introduction of comics in the classroom, teachers’ reading habits and attitudes towards reading comics, and agreement with stereotypical claims about comics per se have no influence on teachers’ attitudes towards the use of comics in the forms studied. However, their attitudes towards the use of comics in the classroom are influenced by certain stereotypical attitudes of teachers towards comics. The most important limitation of our research was also the most important finding: teachers are neither empowered to introduce and use comics as an art-literary type of text in the literary curriculum, nor are they able to use comics as a literary didactic method in literature classes. There is a great need for teacher training and teachers should be empowered to use and introduce comics in all forms.
Frequent Limits and Advantages of Conditions for Geology Education: Example of Czech and Slovak State Curricula
Authors: Jedličková Tereza , Svobodová Andrea , Kachlík Václav
Published: June 2023

Geology is a subject of low interest for many pupils and teachers. The present study aims at examining the organizational conditions for geology education using the model of the Czech Republic and Slovakia, drawing from the national curricula. The study discusses the possible reasons for the unpopularity of the field worldwide and proposes general recommendations that would contribute to increasing interest in geoscience. The main drawbacks of geology education seem to be the large volume of required knowledge, its thematic structure, and a lack of links to real life. The Czech curriculum is vaguely and theoretically defined, placing demand on pupils, especially in the area of memorizing given information and practically pays no attention to recommended teaching methods. In contrast, the Slovak curriculum better reflects current trends. In general, it is necessary to implement continuous educational support for geology teachers and restructure the geology syllabus so that individual sub-fields are interlinked. Moreover, the learning outcome definition should include action-based education, fieldwork, experimenting, and similar elements.
The Families of Special Needs Children from the Perspective of Vulnerability
Authors: Plavčak Darja
Published: June 2023

Difficult life circumstances can make anyone vulnerable. For example, families of children with special needs are at risk, as are families facing other stressful circumstances, such as poverty or parental mental illness.This article builds on previous action research by Plavčak (2020) and introduces a new research problem. We conducted a qualitative analysis of action diary data to answer two new research questions: 1) In what forms did vulnerability appear in students’ families, and 2) What approaches did professionals use to reduce perceived vulnerability? Our findings suggest that families of children with special needs should be approached with sensitivity, flexibility, and balanced interventions. It is important to understand families in the context of their lives, including the emotional stages of caring for a child with special needs and other difficult circumstances they may face. Interventions should be tailored to the specific needs of families and developed collaboratively with them.
Správa o konferenciách na KPI
Authors:   University of Žilina, Marková Iveta , Svetlík Jozef
Published: June 2023

The paper presents a report on conferences (ADVANCES IN FIRE & SAFETY ENGINEERING, FIRE PROTECTION & RESCUE SERVICES), which were aimed at presenting the latest knowledge in the field of fire and safety engineering. The focus of the conferences was also the solution of current issues in the field of higher education and professional training of future experts in the field of rescue services.
Vplyv tepelného toku a retardérov horenia na proces iniciácie drevných materiálov
Authors:   University of Žilina, Harangózo Jozef , Tureková Ivana
Published: June 2023

The paper studies the effects of heat flow on the flammability of wood materials when flame retardants are applied. Beech and spruce wood samples were treated with phosphorus- and carbon-based flame retardants, namely NH4H2PO4 and KHCO3 salts. Retarders were applied by spraying them on the surface of the samples. After their thermal stabilization, the parameter time until the sample ignited when exposed to the action of a radiation panel set to a maximum power of 15 kW was investigated. The results were recorded at different distances of 50, 70, and 100 mm from the radiation panel. KHCO3 was identified as the retarder with the highest efficiency based on the obtained measurements. Thermal decomposition analysis indicated that the improvement in flame retardancy of the treated wood was achieved by dehydration of the polysaccharides and the formation of a protective char shield due to the cessation of heat and oxygen transfer.
Vyhodnocení reálných záznamů jízdy k zásahům z pohledu dynamiky jízdy
Authors:   University of Žilina, Jánošík Ladislav , Jánošíková Ivana , Jonová Karolína , Nováček Vítězoslav , Poledňák Pavel , Šudrychová Izabela
Published: June 2023

The paper briefly informs about the content, solution procedures, and selected results of the student grant competition project entitled “Verification of driving characteristics of firefighting vehicles of type water tender” (Id. No. SP2021/58). It summarizes the results of one of the two main project objectives, which is an evaluation of the emergency driving records of selected emergency firefighting vehicles of the type of water tenders with a focus on driving dynamics.
Syntetické palivá a uhlíková neutralita
Authors:   University of Žilina, Lavčák Matúš , Puškár Michal
Published: June 2023

The transportation sector is a significant contributor to global greenhouse gas (GHG) emissions, accounting for approximately 14 % of all anthropogenic GHG emissions. Despite the increasing popularity of electric vehicles, internal combustion engines (ICEs) continue to dominate the global vehicle fleet, making it essential to find a way to reduce GHG emissions from this sector. One potential solution is the use of efuels, also known as synthetic fuels, which can significantly reduce GHG emissions from transportation. While there are still several challenges associated with their production and use, the benefits of efuels make them a solution worth pursuing. Continued research and development are necessary to improve the efficiency and cost-effectiveness of efuel production and to ensure that they are a sustainable and environmentally responsible solution for the future of transportation. This paper will explore efuels and their potential to decarbonize the transportation sector.
Návrh elektrického mechanizmu otáčania výložníka stĺpového žeriava pre manipuláciu s kalovými čerpadlami
Authors:   University of Žilina, Blatnický Miroslav , Dižo Ján , Molnár Denis , Ishchuk Vadym
Published: June 2023

The article is a continuation of the issue of the technical solution of the hinge for handling sludge pumps in the Jaslovské Bohunice nuclear power plant. The main goal is the design of the electric jib rotating mechanism. It was based on the previous proposal for placing the boom consisting of a dimensional calculation of the new support column and the proposal for placing the boom on this column. The save consisted of two bonds. The upper support of the boom was solved using a rolling bearing fixed in the upper part of the column. The bottom bearing contains an axial plain bearing and a fixed gear as part of the rotating mechanism. In the next step, it is necessary to design the attachment of the selected electric motor with a planetary gearbox and a pinion for this construction. The priority in the design will be mainly to observe the axial distance of the gears, but also to consider the mounting method given by the manufacturer and the torque generated by the engine. A holder in which the motor is attached and then attached to the structure will be designed. Thanks to this, the axial distance will be fulfilled. In addition to supporting the motor, the holder also serves as a radial bearing lock, preventing the bearing from being accidentally pulled out. The result of calculations and designs will be 2D diagrams and 3D visualization of the new construction.
Rovnanie plechu bodovým ohrevom
Authors:   University of Žilina, Moravec Ján
Published: June 2023

The contribution is devoted to the issue of material alignment. The theoretical description and essence of straightening by local heating is presented. Mechanical methods of leveling the material are also covered. In the experimental part, an experiment is described, which is based precisely on the theoretical analysis of the process of straightening by local heating.
Konštrukcia strižného nástroja pre pristrihovanie činných plôch
Authors:   University of Žilina, Melo Borislav , Dostál Róbert
Published: June 2023

Cutting technology is one of the basic and supporting methods, preferably of dividing materials. The preparation of material for further processing cannot be imagined without the use of cutting technology. The text of the contribution describes the geometric solution of the cutter and also the construction of the used tool for the area of trimming sheet metal and creating qualitatively more suitable cutting surfaces. The goal of the contribution was the design of a tool for the application of sheet metal trimming.
Tvárnenie skla v jednoduchom tvárniacom nástroji
Authors:   University of Žilina, Moravec Ján
Published: June 2023

The contribution presents the analysis and issues of glass forming in a forming tool with external heating. The necessary theoretical knowledge and properties of glass, which are necessary for solving the design of the forming tool, are listed. technological methods of glass forming are mainly press-blowing and forming with a double-blowing system. With the help of the described tool, glass can be relatively successfully shaped, which is inserted into the tool in the shape of a plate. The glass plate, which is bent into a cylindrical or hemispherical shape, is placed on the press and heated with a flame until the glass is sufficiently soft to work with.
Cortico–subcortical spatiotemporal dynamics in Parkinson’s disease can be modulated by transcranial alternating current stimulation
Authors: Liu Tiantian , Yan Zilong , Han Ziteng , Zhang Jian , Fang Boyan , Yan Tianyi
Published: June 2023

Objective:

We investigated changes in cortico–subcortical spatiotemporal dynamics to explore the treatment mechanisms of transcranial alternating current stimulation (tACS) in patients with Parkinson’s disease (PD).

Methods:

Resting-state functional magnetic resonance imaging (rs-fMRI) data were collected from 20 patients with PD and 20 normal controls (NC). Each patient with PD received successive multidisciplinary intensive rehabilitation treatment and tACS treatment over a one-year interval. Individual functional brain network mapping and co-activation pattern (CAP) analysis were performed to characterize cortico–subcortical dynamics.

Results:

The same tACS electrode placement stimulated different proportions of functional brain networks across the participants. CAP analysis revealed that the visual network, attentional network, and default mode network co-activated with the thalamus, accumbens, and amygdala, respectively. The pattern characterized by the de-activation of the visual network and the activation of the thalamus showed a significantly low amplitude in the patients with PD than in NCs, and this amplitude increased after tACS treatment. Furthermore, the co-occurrence of cortico–subcortical CAPs was significantly higher in patients with PD than in NCs and decreased after tACS treatment.

Conclusions:

This study investigated cortico–subcortical spatiotemporal dynamics in patients with PD and further revealed the tACS treatment mechanism. These findings contribute to understanding cortico– subcortical dynamics and exploring noninvasive neuromodulation targets of cortico–subcortical circuits in brain diseases, such as PD, Alzheimer’s disease, and depression.
Enhancing grid-connected hybrid PV-Wind systems: A comprehensive review
Authors: Madhulika Dewangan , Tanu Rizvi , Devanand Bhonsle
Published: June 2023

The ability to convert energy from one form to another is essential for both survival and the advancement of society. Wind and solar energy represent the most abundant and widely accessible renewable energy sources globally. It offers significant potential for sustainable power generation and reducing dependence on fossil fuels. Because of the tremendous advancements in power electronic systems in recent years, the output of electricity from wind and photovoltaic energy sources has expanded dramatically. The nonlinear programming (NLP) optimization method was used to determine the maximum electrical efficiency of the grid-connected SOFC subject to the constraints of fuel utilization factor, stack temperature, and output active power based on the benchmark Solid Oxide Fuel Cell (SOFC) dynamic model for power system studies and the analysis of the SOFC operating conditions. By solving the NLP issue with the power required by the air compressor, the optimal operating conditions of the grid-connected SOFC were determined. With the optimal SOFC operating conditions for maximum efficiency operation obtained at different active power output levels, a hierarchical load tracking control scheme for the grid-connected SOFC was proposed to have maximum electrical efficiency operation while keeping the stack temperature bounded.
Categorization and evaluation of voltage sag control methods and equipment: A study
Authors: Ravi Ranjan Kumar , Roshni Rahangdale
Published: June 2023

Voltage sags have emerged as major problems in power quality in the recent years and the categorization of methods and tools available for reducing voltage sag is becoming increasingly crucial. Modern approaches and tools for minimizing voltage sag are based on an extensive research, aimed at developing effective categorization techniques to assist end users in selecting the most suitable tools and settings. To begin, this research provides a comprehensive assessment of the existing voltage sag control methods and equipment. Furthermore, it presents a classification scheme that divides voltage sag control strategies into three groups: those implemented by the power provider, the customer, and the equipment manufacturer. A classification system for voltage sag control equipment based on the number and type of power supply, taking into account the variations between single and dual power supply voltage sag control devices is also proposed. Additionally, to assist consumers in selecting the optimal device, this research demonstrates how primary voltage sag control equipment utilizes the preventive measures and an integrated software.
Exploring the impact of a smart solar-powered EV charging station - A case study
Authors: Vinay Sonber , Vedant Gupta , Ashwani Singh , Vishal Jangde , Rishi Sharan , Ritu Tripathi
Published: June 2023

The transportation sector is a significant contributor to greenhouse gas emissions, which contribute to climate change. In recent years, Electric Vehicles (EVs) have emerged as a promising solution to reduce the carbon footprint of transportation. However, one of the biggest obstacles to its widespread adoption is the lack of adequate charging infrastructure. Solar-powered EV charging stations present a promising solution to this problem, as it can provide a clean and renewable energy for charging EVs while reducing the strain on the grid during peak hours. This paper presents a detailed analysis of the technical requirements for designing and developing solar-powered EV charging stations. This includes considerations such as the location, size, and capacity of the stations, as well as the types of Evs which are designed to charge. The research also examines the economic feasibility of these stations, including the initial capital costs, operating costs, and potential revenue streams.
Impact of Internal Control on the Quality of Accounting Information at Enterprises Listed on the Stock Market in Vietnam
Authors: Nguyen Thi Ngoc Lan , Vu Thi Kim Anh , Bui Thi Ngoc
Published: June 2023

Purpose: This study is intended to show the impact of internal control on the quality of accounting information at companies listed on the stock market in Vietnam.
 
Theoretical framework: We using the multivariate linear regression model between the five independent variables according to five components of internal control in the framework of the COSO 2013 and the dependent variable - accounting information quality according with four attributes namely: appropriateness, reliability, consistency and comparability, completeness and ease of understanding which was presented Susanto in 2016.
 
Design/methodology/approach: Quantitative research methods are used through questionnaires sent to directors and chief accountants of enterprises. The sample size is 193 valid questionnaires for the period from 2021-2022. Statistical analysis tools, testing the reliability of the scale, exploratory factor analysis, and multiple linear regression are used to evaluate the impact of internal control on the quality of accounting information.
 
Findings: The research results have proved that all hypotheses are accepted and internal control factors have a positive impact on the usefulness of accounting information. In which, the control environment variable has the strongest impact with the coefficient β5 = 0.276, followed by the monitoring activity variable with the coefficient β5 = 0.258. The risk assessment variable has the impact level of β2 = 0.201; the information, communication and control variables have the lowest impact with the coefficients of β4 = 0.175 and β3 = 0.141, respectively.
 
Research, Practical & Social implications: The study has provided a basis to confirm the relationship and direction of impact of internal control on the quality of accounting information at companies listed on the stock market in Vietnam. Thereby, this research gives some recommendations for improving the internal control of enterprises in order to improve the quality of accounting information.
 
Originality/value: The findings reveal that the quality of internal control plays an important role in increasing the quality of accounting information, ensuring the safety of enterprises' assets, reducing financial fraud, and improving risk prevention.
The Effect of Covid-19 Pandemic, Grdp, and the City/District Minimum Wages on the Poverty in Banten Province on the Open Unemployment Rate as a Mediation Variable
Authors: Saefullah Encep , Rohaeni Nani , Putra Arta Rusidarma , Afiah Efi Tajuroh , Nurizki Aris Trismayadi , Hilman  , Nailufaroh Lulu , Andriani Jeni , Lestari Dini Martinda
Published: June 2023

Purpose: This research aims to analyze poverty and to know the effect of Covid-19 pandemic, Gross Regional Domestic Product (GRDP), and The City/District Minimum Wages on the poverty in Banten province on the open unemployment rate (TPT) as a mediation variable.
 
Theoretical framework:  Poverty is a primary issue that becomes the attention of every nation's government.  The poverty rate in the province of Banten is the sum of eight districts or cities. Based on the findings of the National Socio-Economic Survey (Sensus Sosial Ekonomi Nasional), the poverty rate in Banten Province in March 2021 was 6.66 percent, up from 5.92 percent in 2020 and 5.09 percent in 2019.
 
Design/methodology/approach:  This study used a sample of eight districts/cities in the province of Banten. This research employs a quantitative methodology using secondary data sources. Banten Province's Central Statistics Agency (BPS) is the data source for this study.. The time frame considered is three years, from 2019 to 2021.
 
Findings:  the result of this research shows that Covid-19 Pandemic (as X1), Gross Regional Domestic Product (X2), and The City/District Minimum Wages (X3) show a direct effect on Poverty (Y) in Banten province as 99.2, and indirect effect of Covid-19, Gross Domestic Product and The City/District Minimum Wages through Open Unemployment Rate (Z) on the Poverty (Y) in Banten province as 93.5%.
 
Research, Practical & Social implications: This study expands theories and concepts for addressing poverty and unemployment, particularly in Banten Province, particularly those related to factors that have a significant impact or influence on poverty and unemployment, so they can be used as references by policymakers in Banten Province when developing programs and policies to address these issues,  especially in light of the ongoing Covid-19 epidemic, which has not been eradicated.
 
Originality/value: The data value of research originality by measuring and combined the effect of the covid-19 pandemic, GRDP, The City/District Minimum Wages on poverty by using the open unemployment rate variable as mediation for the first time in banten province.
Business Orientation and Innovation Capability in Improving Operational Performance
Authors: Pradana Bayu Ilham , Safitri Rini
Published: June 2023

Purpose:  This research aims to better understand how Business Orientation and Innovation Capability affect Operational Performance in MSME Coffee Shops.
 
Theoretical framework:  The one of the most impacted sectors during Covid-19 pandemic is Micro, Small, and Medium Enterprises (MSME), leading to a decline in national economy, such as in coffee shops, which adopt franchise concept and are established throughout Malang City. To date, drinking coffees is perceived as more than just fulfilling needs, as it becomes a new lifestyle.
 
Design/methodology/approach:  This study, in particular, is considered as an explanatory research with a quantitative approach.   Data analysis was conducted by using statistical methods based on the objectives of this study. This study applied the analytical tool of SmartPLS 3.0 to prove whether there is an effect of Business Orientation on Innovation Capability and Operational Performance at coffee shops in Malang City.
 
Findings:  The result of this research suggests that Business Orientation shows significant effect towards Innovation Capability and Operational Performance. Innovation Capability mediates the correlation between Business Orientation and Operational Performance. Innovation Capability becomes the competitive advantage for many industries due to its role in enhancing quality, efficiency, speed and flexibility.
 
Research, Practical & Social implications: This study is a suggestion for coffee shop MSMEs to develop the innovation capability because of its role in improving quality, efficiency, speed and flexibility in a business.  Based on the raised in this study, Coffee Shops in Malang are capable of innovating the products and market. Building organizational innovation is demanded to improve performance organization and strategy by conducting surveys or research on opportunities and threats, thus SMEs could make the right decisions in utilizing new opportunities.
 
Originality/value:  The value of the study that Business Orientation and Innovation Capability could serve as the drive for Operational Performance. However, entrepreneurial orientation is more significant in having the ability to innovate than those who do not have the ability in entrepreneurship. Likewise, if a company emphasizes proactiveness in its business activities, it will automatically encourage high performance but does not rule out the possibility of being universally applied seeing that MSMEs have the same characteristics.
Socially Responsible Investment (SRI) in Relation to Personality Traits
Authors: Rathi Kuttallur Narayanan , Geetha Duraisamy
Published: June 2023

Purpose: The aim of this study is to examine the impact of intellectual capital (human capital, structural capital, and employed capital) on the financial performance of listed insurance companies in the Amman Stock Exchange
 
Theoretical framework: Intellectual capital has become increasingly important in generating value for companies, and many researchers have linked it to corporate financial performance and strategic competitive advantage.
 
Design/methodology/approach: The study population consist of 21 insurance companies listed on the Amman Stock Exchange in Jordan during the period of 2011-2020. Intellectual capital was measured using the value added intellectual coefficient model (Pulic, 2000), and its impact on financial performance was analyzed using published financial statements of the insurance companies.
 
Findings:  The results of the study found a statistically significant positive effect of human and employed capital on financial performance as measured by the rate of return on assets and return on equity. Furthermore, the study revealed a significant positive effect of intellectual capital, specifically human capital, on financial performance measured by market value (Tobin's Q).
 
Research, Practical & Social implications: The study suggests that insurance companies should treat intellectual capital as a strategic resource and monitor and invest in it periodically for continuous development. The study suggests building a positive organizational culture that supports intellectual capital is recommended
 
Originality/value:  This study contributes to the understanding of the relationship between intellectual capital and financial performance for the first time in the insurance industry in Amman Stock Exchange. The findings highlight the importance of managing and investing in intellectual capital as a strategic resource to enhance financial performance.
Online Purchase Decision of Gen Z Students at Shopee Marketplace
Authors: Said Laila Refiana , Anggela Maya , Fariany Gusti Rina
Published: June 2023

Purpose: This study's objective is to analyze the purchase decisions of Generation Z (Gen Z) university students on the Shopee marketplace.  The detailed analysis was: The influences of online customer ratings, celebrity endorsers, and free shipping promotion on the purchase decision.
 
Theoretical framework: Gen Z is the generation that uses technology the most, especially for social contact.  Therefore, Gen Z is used to online shopping. However, Gen Z is still forming and is not fully identified.
 
Design/methodology/approach:  This study's participants were university students who had purchased on the Shopee marketplace.  By purposive sampling method, the total sample gathered was 160 respondents.   Multiple linear regression analysis was utilized to evaluate the data.
 
Findings: The findings indicated that online customer ratings did not affect purchasing decisions of Gen Z customers in the marketplace.  Other variables, celebrity endorsers and free shipping promotions, affected purchase decisions.
 
Research, Practical & Social implications:  Gen Z students are price sensitive.   Gen Z students will likely be attracted to marketplaces that offer promotional offers and discounts on their products and services.  Gen Z students are heavily influenced by social media, the recommendations of their peers, and brand ambassadors. Therefore, a marketplace with a solid social media presence and a positive reputation among Gen Z students will likely attract and retain their business more successfully.
 
Originality/value: Gen Z considers celebrity opinions more matter than ordinary customer reviews.
A Study on Capacity of Rural Social Enterprise Needs to be Unlocked
Authors: Teck Tan Seng
Published: June 2023

Purpose: This article argues that social entrepreneurship can help rejuvenate rural towns by increasing long-term growth in the economy, reversing the degradation of public services, while bring people together. Based on a survey of the relevant academic and policy literature, the study constructs a computational basis that provides insight into how social enterprises may contribute to rural rejuvenation.
 
Theoretical framework: In order to realize the potential of underpopulated social enterprise, we may need to move beyond conventional regulatory silo systems that classify economic growth, community cohesiveness, and public services as wholly separate and unrelated. With regards to government regulation, social enterprises can't just "grow up" and reap the benefits of economies of scale by themselves. Partnerships between groups of innovators or between socially-minded businesses and government agencies have the potential to create economies of scope through the sharing of resources and the pooling of expertise, all while fostering strong confidence relationships within communities through the use of identifiers and the integration of services.
 
Design/methodology/approach: An extensive research design (Sayer, 1992) that includes three in-depth exploratory studies of social enterprises situated in rural regions has been pursued due to the paucity of prior research on the topic under study. This study used a mix of methods for gathering qualitative data.
 
Findings: Based on our findings, we argue that social businesses can facilitate coordinated community action in response to issues. Additionally, these organisations' participation in and blending of market, redistribution, and reciprocity connections is shown in our findings, demonstrating their "constructive diversity."
 
Research, Practical & Social implications: The company's products and services can be adapted to better meet the needs of those located in outlying areas. Many of the difficulties and requirements in rural regions may be turned into openings for the growth of social enterprises with the right kind of direction and assistance.
 
Originality/Value: This study sheds light on the information gaps that, when filled, could help rural social entrepreneurs realize their full potential by clarifying the obstacles and openings they confront.