bluuebunny/crossref_metadata_2025 huggingface dataset:
Digital technologies as a driver of resilience and institutional transformation: The case of Ukrainian agroholdings
Authors: Gagalyuk Taras , Kovalova Maryna
Published: February 2024

The present paper explores how implementation of digital technologies (DTs) assists firms in transition economies in addressing weaknesses of the institutional environment surrounding them, in particular via establishment of collective governance systems. Based on case studies of three large-scale agroholdings operating in Ukraine, the paper aims to fill the research gaps with regard to the following: motivation of the firm to initiate DT-enabled collective governance systems; the rules these systems are based on; and the reasons behind the firm’s choice of a particular governance mode – closed, shared or open – for these systems. The findings generally support the institutional theory argument that complex technology enables coordination of exchange relationships not only within but also outside firm boundaries. At that, the choice of a governance mode between closed, shared or open institutional infrastructure is likely to depend on the firm’s ownership concentration, corporate transparency, availability of resources and social embeddedness.
The Effect of Antecedent Topography on Complex Crater Formation
Authors: Hood Don R , Young Brennan , Cohen-Zada Aviv Lee , James Peter Benjamin , Ewing Ryan C. , Lee Jeffery S.
Published: February 2024

Impact craters that form on every planetary body provide a record of
planetary surface evolution. On heavily-cratered surfaces, new craters
that form often overlap older craters, but it is unknown how the
presence of older craters alters impact crater formation. We use
overlapping complex crater pairs on the lunar surface to constrain this
process and find that crater rims are systematically lower where they
intersect antecedent crater basins. However, the rim morphology of the
new crater depends on both the depth of the antecedent crater and the
degree of overlap between the two craters. Our observations suggest that
transient rim collapse is altered by antecedent topography, leading to
circumferential distribution of rim materials in the younger crater.
This study represents the first formalization of the influence of
antecedent topography on rim morphology and provides process insight
into a common impact scenario relevant to the geology of potential
Artemis landing sites.
Scoping Literature Review of STEM Research in Indonesia in Improving Critical Thinking Skills and Concepts Mastery
Authors: Parameswari Pradnya , Sutoyo Suyatno , Azizah Utiya
Published: February 2024

The publication of previous articles on STEM research was still limited to describing the impact of STEM on learning and did not provide specific information on certain competencies. In addition, these publications are still limited to one level of education and subjects as sample criteria. This study aims to analyze the literature on STEM research in Indonesia in improving critical thinking skills and concepts mastery in chemistry, physics, biology, and science subjects from elementary to tertiary education levels, summarizing and disseminating a wide selection of literature. Research methods include identifying research questions, identifying relevant studies by searching for research articles in journals and conference articles in proceedings with certain keywords, selecting studies based on criteria, mapping data, then compiling, summarizing, and reporting the results. After that charting the data is synthesizing and interpreting qualitative data by sifting, charting, and sorting material according to key issues and themes. The findings from this analysis are that STEM research is dominated by the use of experimental methods (53.33%), STEM as a learning approach (71.1%), and especially PjBL (24.44) and PBL (17.78%). STEM research related to learning and developing learning tools based on learning models other than PjBL and PBL has not been done much.
Growth Your Mindset to Increase Resilience in College Students
Authors: Rasyid Miranti , Suhesty Aulia , Rahayu Diah , Indayani Nur Najiba , Adhikarapandita Ayusha
Published: February 2024

Academic stress and psychological pressure is most often felt by students. One of the factor great factor is person's resilience ability that greatly influenced by the mindset of the person in seeing their experiences and life. This study aims to analyze the effectiveness of the influence of growth your mindset training to increase student resilience. The research design used was a pretest-posttest control group design. The research subjects were 30 students who were divided into 15 students in the experimental group and 15 students in the control group. Student resilience was measured using a student resilience scale. Data analysis used Wilcoxon and Mann-Whitney U Test using SPSS 25 Software for Windows. The results of the analysis using the Wilcoxson test which compared the resilience scores of students in the experimental group between before and after training showed a value of Z = -2.901, p = 0.004 (p <0.05) meaning that there were differences in resilience scores among students before and after being given the growth your mindset training treatment, so that there is a significant increase in resilience after being given the growth your mindset training treatment. The results of the analysis using the Mann-Whitney U Test showed a value of Z = -3.744, p = 0.000 (p <0.05) meaning that there were differences in the level of resilience in students between the experimental group that was given the growth your mindset training treatment and the control group that was not given the growth your mindset training treatment.
Mindfulness Training to Lower Anxiety in New College Students
Authors: Suhesty Aulia , Rasyid Miranti , Rahayu Diah , Annabila Nadia , Uli Theresia Dwi
Published: February 2024

Anxiety is normal for every human being so that it is expected that every individual has the ability of mindfulness to reduce the anxiety that will be faced. Importance of mindfulness to reduce anxiety in college students. This study aims to analyze the effectiveness of the influence of mindfulness to reduce anxiety in new students. The research design used was a pretest-posttest test control group design. The research subjects were 26 new college students who were divided into 2 groups, namely 13 students in the experimental group and 13 students in the control group. The results of the analysis used the Wilcoxson test which compared the work readiness scores in the experimental group between before and after the training. The result showed a value of Z = -3.185, p = 0.000 (p <0.05) meaning that there was a difference in anxiety scores before and after being given the mindfulness training treatment, so there was a decrease in the level of significant anxiety after being given mindfulness training treatment. The results of the analysis using the results of the Mann-Whitney U Test obtained statistical results (Z) = -3.619 with a significance value (2-tailed) = 0.000 (p <0.05), meaning that there was a difference in the level of anxiety between the experimental group that was given treatment in the form of mindfulness training and the control group that was not given treatment in the form of mindfulness training.
The RISE ME Clinical Supervision Model Based on Microsoft Teams to Enhance Teacher Performance
Authors: Lahade Stefanus , Dwikurnaningsih Yari , Waruwu Marinus
Published: February 2024

The development of the RISE ME clinical supervision model using the Microsoft Teams application is a model that integrates the Microsoft Teams application into the implementation of clinical supervision. This research aims to analyze the current implementation of clinical supervision, develop the model, and analyze the model's effectiveness on teacher performance. The research utilizes the Research and Development method. Data collection is done through interviews, questionnaires, and documentation. Data analysis is conducted descriptively and qualitatively. In this study, several challenges were found in the current implementation of clinical supervision by school principals, including low teacher initiative to request clinical supervision and a lack of flexibility in the implementation of clinical supervision. Based on the preliminary research, a technology-based clinical supervision model was developed and validated by experts, becoming a valid model. Furthermore, the model was tested on a limited scale, effectively improving teacher performance. The current clinical supervision model is still not effective. The needed clinical supervision model at present is technology-based. The developed model effectively improves teacher performance.
The Impact of Tactical Skills in Promoting Harmonious Learning Environment among Undergraduate Students
Authors: Adeoye Moses Adeleke , Oladimeji Rasheedat Modupe , Jolaoye Joshua Durotoye , Tiamiyu Kamoru Abidoye , Mohammed Abdulrazak
Published: February 2024

Tactical skills refer to effective communication and conflict resolution strategies that can be used to address challenging situations calmly and respectfully. The theoretical framework draws on social learning theory and situational leadership theory. This study aims to analyze the impact of tactical skills on promoting a harmonious learning environment among undergraduate students. The method used in this research is Systematic Literature Review (SLR). The researchers collected journal articles from Google Scholar, Research Gate, SINTA, Scopus and Web of Science. The result of this study highlights the significance of tactical skills in fostering positive relationships among students, promoting effective communication and addressing conflicts in the learning environment. This study discusses examples of tactical skills such as active listening, positive framing, and collaborative problem-solving. It also addresses common challenges to promoting a harmonious learning environment, including student conflicts, disruptive behavior, cultural differences, and lack of resources and provides strategies for overcoming these challenges. The paper also examines relevant empirical studies that support the role of tactical skills in promoting a harmonious learning environment. Finally, the paper concludes that educators and administrators should prioritize the development of tactical skills in their teaching and learning practices to create a more inclusive and collaborative learning environment.
The Contingencies of Emotional Intelligence on the Academic Performance of Trainee Teachers in selected Colleges of Education in Ghana
Authors: Commey-Mintah Priscilla
Published: February 2024

By understanding the contingencies of EI on AP, teacher education programs can be designed to foster the development of EI skills among trainee teachers, leading to more effective teaching practices and improved student outcomes. This study analyze the effect of EI (EI) on the academic achievement of aspiring English and math teachers. The study's teacher candidates were located in the two coed colleges of education. A quasi-experimental technique was adopted in the design of this investigation. Using the multistage sampling method, 648 second year prospective teachers were selected from the two colleges. EI Inventory were both adapted and used as the basis for the questionnaires that were created and given to all responders. The analysis is used A Multivariate Analysis of Variance (MANOVA). The results of the study showed a substantial difference in mathematics performance between the teacher candidates who were a part of the experimental group and those who were a part of the control group. On the other hand, there was no discernible difference in performance between the experimental and control groups in terms of English language. Hence, EI influenced trainees’ high performance in Mathematics, but it did not influence their performance in English Language. As a strategy to boost trainees’ EI, the implications and various recommendations have been made to both the administrative staff and tutors as well as the teacher trainees of the colleges of education.
The Impact of Problem-Based Learning on Learning Outcomes Using the Effect Size Calculator for T-Test
Authors: Muslim  , Ambiyar  , Wakhinuddin  , Usmeldi  , Arif Ahmad
Published: February 2024

Various kinds of research that has been conducted on the effect of problem-based learning on learning outcomes have varied and sometimes conflicting outputs, so it is necessary to carry out a meta-analysis. This article presents a meta-analysis regarding the impact of problem-based learning in improving student learning outcomes. This type of research is based on the source of meta-analysis in the form of experimental or quasi-experimental and observational research with a quantitative approach. Data analysis was seen from the effect size using a calculator for t-test. The subjects in the research are studies that are collected in the form of articles related to the purpose of the research. The results of the analysis of 26 article sources, obtained an average effect size of around 0.79 in the medium category. Problem-based learning is indeed effective in improving student learning outcomes. The implication of doing meta-analysis is to be able to find out more accurately about problem-based learning approaches that are effective in improving student learning outcomes as well as useful information for policy makers in the field of education.
How Important of Students' Literacy and Numeracy Skills in Facing 21st-Century Challenges: A Systematic Literature Review
Authors: Deda Yohanis Ndapa , Disnawati Hermina , Daniel Otaget
Published: February 2024

Literacy Numeracy skills (LNS) are fundamental for facing global challenges in the 21st century. LNS can help people achieve their goals. However, there has not been a thorough study on literacy and numeracy research. To improve the quality of literacy and numeracy research, researchers must study much literature for further analysis. This research aims to analyze students' literacy and numeracy skills in facing 21st-century challenges. The research method used is the Systematic Literature Review to read 27 documents by searching for the keywords "literacy", "numeracy", and “Literacy and Numeracy”. This type of research is library research with the stages of determining research questions, searching literature, selecting articles, reading full papers, making abstractions, and conducting analysis. The data analysis technique used is content analysis. The study results show that the dominant research methodology used is quantitative; the instruments often used are tests and assessments. The chief field is mathematics; the overall educational level is junior high school and early childhood education. Some motivational results research related to literacy and numeracy skills includes digital competencies, learning videos, and games, effectively improving literacy and numeracy skills. Furthermore, not all learners have strong reading and numeracy abilities. A strong recommendation for further research is to develop learning media based on local wisdom using the Android platform. In addition, researchers must embed emergent literacy in the design and case study of didactically and pedagogically oriented research.
Flipped Classroom Integrated with Ethnoscience: Innovative Learning Tools in Science Learning
Authors: Putri Helmalia , Jufrida  , Dani Rahma
Published: February 2024

Learning tools for a teacher are an obligation that must be owned, because they become a guide for a teacher in carrying out the teaching and learning process. Learning devices are the initial stage in the learning process, so the quality of the devices used must make students more active in the learning process. The aim of this study is to develop learning devices of flipped classroom independent curriculum integrated with ethnoscience materials applying the principles and concepts of heat. This study uses a 4D model, but researchers conduct research only at the develop stage. The subjects of this study were 2 Physics lecturers and teachers. The data collection method used in this research is in the form of interviews and expert validation sheets, namely pedagogy, materials and media. Data analysis techniques in this study consisted of qualitative data, quantitative data and validation questionnaire data. The result produce flipped classroom learning device integrated with ethnoscience in the material applying the principles and concepts of high school physics heat. Based on the validation data of lecturers as experts and teachers as users, it can be concluded that the validation learning device products get results in all aspects in very good categories.
Unlocking the Potential of Education in Nigeria's Industry 4.0 Era: Overcoming Challenges of Digital Transformation
Authors: Adeoye Moses Adeleke , Akinnubi Olaolu Paul , Yahaya Ajoke Kudirat
Published: February 2024

The introduction of Industry 4.0 has led to enormous technology advancements that have altered many different industries throughout the world. As Nigeria struggles to stay up with the digital revolution, it faces numerous educational obstacles. The primary obstacles to the successful implementation of digital transformation in the Nigerian educational system are examined. This study aims to analyze the importance of fostering partnerships between governmental bodies, business executives and academic institutions. The research method uses Systematic Literature Review (SLR). The data collection process is carried out by identifying and evaluating scientific articles that are relevant to the topic. After identifying relevant articles, the data analysis process began by thoroughly reading each selected article. The study found collaboration can make it easier to share information, resources and expertise, creating environment for the digital revolution of education. In conclusion, Nigeria must overcome several obstacles to fully realize the potential of education in the age of Industry 4.0. By investing in infrastructure, teacher training, curriculum development, collaborations, research, and inclusivity, Nigeria may embrace the promise of digital transformation to enhance its educational system and prepare its future workforce for the demands of the digital era.
Influence of Parenting Styles on Students’ Performance under Modular Distance Learning
Authors: Casinillo Leomarich F , Agravante Nicolle , Baldevia Athena Claire N. , Tang Erin Chanelle O.
Published: February 2024

The influence of parents on their children is vital in that it molds a cognitive behavior that will reflect on their academic performance. During the COVID-19 pandemic, high school students have to learn in the form of modular learning in which they were just in their respective homes and their parents were taking the role of school teacher. This study aimed to evaluate the influence of different parenting styles of parents on the student's performance under modular distance learning amid the lockdown of the pandemic. Primary data were collected from 87 high school students who responded to the Google survey such as profiles of students, grades, and parenting styles using the Parental Authority Questionnaire (PAQ). The data gathered were analyzed through standard descriptive measures and correlational analysis. Results depicted that, on average, students have a "very satisfactory" performance, that is, the grade point average is 93%. Moreover, students' mothers and fathers are both "authoritative" in their education. Based on the correlation analysis, the mother's strictness (opposite of permissive (p-value=0.027) can positively influence the student's academic achievement, but the relationship is revealed to be weak. In addition, the fathers' parenting styles have no association with their children's academic performance based on the correlation analysis (p-values>5%). This implies that most of the time students are learning independently from their respective parents at home. Hence, most of the high school students during modular learning amid the pandemic are learning without the aid and influence of their parents.
Percepción estudiantil de la responsabilidad social universitaria en la gestión organizacional: un estudio en una unidad académica del Instituto Politécnico Nacional
Authors: Melo Rojas Gina Marcela , Hernández Herrera Claudia Alejandra
Published: February 2024

El presente estudio se centra en analizar la percepción estudiantil de la propuesta de responsabilidad social universitaria vinculada con la gestión organizacional ejercida por los líderes de una de las unidades académicas del Instituto Politécnico Nacional de México. Este estudio se enmarca en un enfoque cuantitativo, para lo cual se empleó un muestreo no probabilístico por conveniencia donde participaron 1410 estudiantes de licenciatura e ingeniería. Para recopilar la información, se utilizó la encuesta de responsabilidad social universitaria del modelo URSULA, propuesto por Vallaeys (2020), aunque se enfocó únicamente en la dimensión de gestión organizacional y los estudiantes. Los datos fueron procesados y analizados mediante el software SPSS. Se realizó un análisis descriptivo detallado para cada una de las subdimensiones evaluadas en la encuesta. Los hallazgos muestran una alta aceptación y valoración positiva de la responsabilidad social universitaria en su dimensión gestión organizacional. Estos resultados refuerzan la importancia de la gestión organizacional en el contexto de la responsabilidad social universitaria y su impacto en la percepción estudiantil. En conclusión, este estudio ha contribuido a comprender la percepción estudiantil de la responsabilidad social universitaria en relación con la gestión organizacional ejercida por los líderes de la unidad académica del Instituto Politécnico Nacional y pueden servir como base para desarrollar políticas y acciones que fortalezcan aún más la RSU en la institución.
Performance Evaluation of Four Novel Cassava (Manihot esculenta Crantz) Accessions to Different Fertilizer Types in Awka, Anambra State, Nigeria
Authors: Iwuagwu Chukwunenye Christian , Nwankwegu Agatha Chioma , Ikenwa Basil Okwudili , Iheaturu Donald Ezechukwu , Apalowo Oyetunde Ayotunde , Ejiofor Mary-Geraldine Ebele , Iwu Doris Chioma
Published: February 2024

The investigation was carried out on the effects of fertilizer and cassava variety on agronomic characteristics, yield, and disease incidence of four improved cassava accessions. The experiment was carried out at the Teaching and Research farm of Crop Science and Horticulture, Nnamdi Azikiwe University Awka, Anambra State. It was a 4 × 3 factorial experiment with treatments laid out in a Randomized Complete Block Design (RCBD) with three replications. Fertilizer types were NPK 15:15:15 at a rate of 400 kg/ha, poultry manure (PM) at a rate of 50 tons/ha and no application as control. The cassava accessions were TMS539, TMS092, TMS371 and TMS412, obtained from the International Institute for Tropical Agriculture (IITA) in Ibadan, Nigeria. Stems were cut to about 15cm and planted at a spacing of 0.5m apart. The parameters measured were the number of root tubers, total number of rot tubers, weight of tuber (kg), stem girth (cm), node per stand, branching interval, internode spacing (cm), number of branching, plant height (cm), age at branching, disease incidence. Normal agronomic practices were carried out. Results showed that all varieties responded to the application of inorganic and organic fertilizers. Cassava plants that did not receive any fertilizer application (no application) gave the highest number of root tubers (29.7) from TMS412, and the least was from TMS092. The result also showed that there was no significant difference in the effects of fertilizer type on diseases. Results also showed that there was a significant interactive effect of cassava varieties and fertilizer type on branching interval (7.009), Internode spacing (0.6195), number of branching (0.2822), and plant height (17.02) at six months after planting. From the investigation, it could be recommended that for farmers to obtain greater yields with little or no fertilizer application, these cassava accessions should be used, which are characterized by high yield and resistance to disease and pests, as shown from this research.
Shaping a Modern Townscape in The City Centre Area: The Case of Vilnius
Authors: Panavaitė Lina
Published: February 2024

The development of a contemporary townscape within the historical urban structures is a phenomenon of this period that has been going on in Lithuania for about 20 years. This is an ongoing process with an uncertain outcome, as the rapidly changing urban design trends require quick responses to current needs. It is necessary to modify, revise, and supplement the concepts and existing legislation accordingly. This article examines the factors leading to the emergence and formation of the modern townscape in Vilnius, as well as the documents governing the city’s development after gaining independence. It presents an evaluation of the newly established urban structures in the central part of Vilnius and identifies the challenges and problems in shaping the contemporary townscape. The results of the study allow us to identify what actions must be taken in order to form a high-quality modern townscape, starting with self-evaluation of what has been done and ending with the creation of a dynamic urban model that would respond to constantly changing needs.
Time is a Funny Thing: Response Times and Humor Quality in a Creative Joke Production Task
Authors: Silvia Paul J. , Cotter Katherine N. , Christensen Alexander P.
Published: February 2024

Generating creative ideas takes time: the first idea to come to mind is usually obvious, and people need time to shift strategies, enact executive processes, and evaluate and revise an idea. The present research explored the role of time in creative humor production tasks, which give people a prompt and ask them to create a funny response. A sample of 152 young adults completed four joke stems prompts. Their response times were recorded, and the responses were judged for humor quality (funniness) by six independent judges and by the participants themselves. Mixed-effect models found that, at the within-person level, response time’s link to humor quality diverged for judges and participants. The judges’ ratings of funniness predicted longer response times (relatively funnier responses took longer to create), but participants’ self-ratings of their own responses predicted shorter response times (relatively funnier responses were created faster). Controlling for elaboration (quantified via word count of the response) diminished the effect of judge-rated humor but not participant-rated humor. Taken together, the results suggest that the role of time in humor generation is complex: judges may be weighting elaboration more heavily when judging funniness, whereas participants may be weighting metacognitive cues like ease-of-generation when judging their own ideas.
Human activity recognition with fine-tuned CNN-LSTM
Authors: Genc Erdal , Yildirim Mustafa Eren , Salman Yucel Batu
Published: February 2024

Human activity recognition (HAR) by deep learning is a challenging and interesting topic. Although there are robust models, there is also a bunch of parameters and variables, which affect the performance such as the number of layers, pooling type. This study presents a new deep learning architecture that is obtained by fine-tuning of the conventional CNN-LSTM model, namely, CNN (+3)-LSTM. Three changes are made to the conventional model to increase the accuracy. Firstly, kernel size is set to 1×1 to extract more information. Secondly, three convolutional layers are added to the model. Lastly, average pooling is used instead of max-pooling. Performance analysis of the proposed model is conducted on the KTH dataset and implemented on Keras. In addition to the overall accuracy of the proposed model, the contribution of each change is observed individually. Results show that adding layers made the highest contribution followed by kernel size and pooling, respectively. The proposed model is compared with state-of-art and outperformed some of the recent studies with a 94.1% recognition rate.
Design and implementation of a current-fed dual active bridge converter for an AC battery
Authors: Do Tuan Anh , Nguyen Quang Dich , Vu Phuong
Published: February 2024

Home battery has become more and more popular in which the AC battery is a trending product along with the AC-coupled system. The energy conversion of an AC battery commonly consists of a two-stage power converter to flexibly connect to the wide-range input battery voltage and different grid or load types. This study specifically concentrates on the DC/DC stage which plays an important role in transferring power with the battery. In addressing the need for isolation, bidirectional power flow, and limited battery current ripple, the Current-fed Dual Active Bridge (CFDAB) structure is chosen for this stage. This paper presents a comprehensive design for the CFDAB converter for an AC battery application, especially a technical solution focusing on zero voltage switching is applied to increase the efficiency of the converter. Finally, an experimental prototype is carried out to validate the performance of the CFDAB converter in both two modes of the power flow.
On Darbo’s fixed point principle
Authors: Taoudi Mohamed Aziz
Published: February 2024

In this paper, we prove the following generalization of the classical Darbo fixed point principle : Let X be a Banach space and µ be a montone measure of noncompactness on X which satisfies the generalized Cantor intersection property. Let C be a nonempty bounded closed convex subset of X and T : C → C be a continuous mapping such that for any countable set Ω ⊂ C, we have µ(T(Ω)) ≤ kµ(Ω), where k is a constant, 0 ≤ k < 1. Then T has at least one fixed point in C. The proof is based on a combined use of topological methods and partial ordering techniques and relies on the Schauder and the Knaster-Tarski fixed point principles.
Basins of attraction of a one-parameter family of root-finding techniques
Authors: Basto Mário , Basto Mário Alberto
Published: February 2024

Initial conditions can have a substantial impact on the behavior of iterative root-finding techniques for nonlinear equations. By allowing complex starting points and complex roots, it is possible to examine the basins of attraction in the complex plane in order to compare the performance of various iterative techniques. In this paper, a one-parameter family of third-order root-finding methods is studied by varying its parameter A within −2.0 and 2.4 and applying it to a polynomial equation of high degree (degree 25). This family includes the Euler–Chebyshev’s (A = 0), Halley’s (A = 1) and BSC (A = 2) techniques. According to the results, the one-parameter family provides the best performance for values near A = 1, which equals to the Halley’s method.
On some generalization of order cancellation law for subsets of topological vector space
Authors: Przybycie Hubert
Published: February 2024

In this paper we generalize a result of R. Urbański from paper [7] which states that for subsets A, B, C of topological vector space X the following implication holds

A
+
B
⊂
B
+
C
⇒
A
⊂
C

A + B \subset B + C \Rightarrow A \subset C

provided that B is bounded and C is closed and convex. The generalization is given in Theorem 5 where we prove this result for k- convex subsets of a topological vector space. Also we introduce a notion of some abstract like-closure operation for subsets of linear space and we study its connections to order cancellation law.
Supercritical CO2 Extraction of Fish Roe
Authors: Luksta Ilze , Mika Taras , Spalvins Kriss
Published: February 2024

Seafood is rich in omega-3 polyunsaturated fatty acids, and the good emulsifying properties of phospholipids make them suitable for use in the food, pharmaceutical and cosmetic industries. This study attempted to evaluate different fish species obtained using supercritical carbon dioxide without and with and ethanol as co-solvent extraction and organic solvent (ethanol) extraction. Supercritical CO2 extraction was performed at 30–50 °C and at different pressures (17.7–33.0 MPa), maintaining a CO2 flow rate of 0.6 mL/min for 3 hours. Gas chromatography and Bligh & Dyer methods were used to analyze the extracts. The results showed that only one species of fish roe (rainbow trout) produced oil, but it was concluded that improvements were needed to be able to extract oil from African catfish roe using supercritical CO2 extraction. Rainbow trout roe contains the most monounsaturated fatty acids (44 %).
Assessing the Sustainability Impact of Improving Secondary Steel Production: Lessons Learned from an Italian Plant
Authors: Tomasoni Giuseppe , Marciano Filippo , Stefana Elena , Cocca Paola
Published: February 2024

This work presents a sustainability assessment approach to evaluate technological innovations in secondary steel production making use of Electric Arc Furnace (EAF) technology. The assessment covers the environmental, social, and economic dimensions of sustainability by combining different tools (Life Cycle Assessment and Analytic Hierarchy Process), and also provides an integrated assessment of the overall sustainability. The approach, which can also be used to support decision-making, has been applied to a real case study of a steel plant located in Northern Italy. In the case study, environmental sustainability is positively impacted mainly by increased metal yield and reduced furnace energy consumption. The greatest social sustainability benefits are mainly related to improved ergonomic and safety conditions for workers (reduced demand for physical effort, manual handling and repetitiveness, and lower risk of accidents), as a consequence of the introduction of Industry 4.0 technologies. Regarding economic sustainability, a positive impact related to reduced cycle time, increased metal yield and quality yield, reduced maintenance and quality control costs was observed. The integrated assessment of the overall sustainability has proven to be a viable approach to manage trade-offs between the different dimensions of sustainability.
Factors Affecting the Recession of Construction Brick Industry: A Case of Moklan Brick Kiln Factory Nakhon Si Thammarat, Thailand
Authors: Prommuang Phawat , Seviset Somchai , Egwutvongsa Songwut
Published: February 2024

Purpose of the Study: Construction brick industry has generated high income and it is the main revenue of Moklan city residents for a long time. However, recently, there has been a huge decrease of demand due to several reasons both from internal and external factors. The output of this research can be used to solve the problem and revive Moklan city economy. The purpose are 1) To study factors affecting the recession of the construction brick manufacturing industry in Nakhon Si Thammarat Province. 2) To propose a guideline for solving the recession problems.
 
Methodology: This is qualitative research using in-depth interview as a research tool. The data were collected from 40 owners of the Moklan brick kiln factory in Nakhon Si Thammarat, Thailand selected by purposive method. Data were analyzed by content and thematic analysis.
 
Main Findings: 1) Factors affecting to the recession of the industry consist of technology changes, environmental concerns, domestic economy, and product quality. 2) The guideline for solving this recession, the product must be environmentally friendly products, correspond to personal demand of customers, durable, and comprehensive usage.
 
Applications: The output of this research can be applied in construction brick companies to improve their competitive advantage and production design and process.
 
Novelty/Originality: This study reveal the factors to revive construction brick companies in Nakhon Si Thammarat , Thailand.
Characteristics and Distribution of Heat-Related Illnesses during Hajj 2022
Authors: Almuzaini Yasir , Alburayh Mariyyah , Alahmari Ahmed , Alamri Fahad , Mukhtar Nomai , Ahmed Ghadah , Alabdullatif Lamis , Sheerah Haytham , Khan Anas
Published: February 2024

Background: Heat-related illnesses (HRI) are defined as elevated body core temperatures when exposed to an intense high temperature. HRIs include but are not limited to heat exhaustion (HE) and heat stroke (HS). HE and HS are among the leading causes of morbidity and mortality among pilgrims when the Hajj season occurs during the hot cycle of the year in Makkah.
Methods: A retrospective cross-sectional data analysis was conducted on HRI cases during Hajj 2022/1443 Hijri. The data were extracted from the Hajj electronic health records system software immediately at the end of the Hajj period.
Results: A total of 200 patients presented with HRI symptoms during the study period. Over half of the HRI patients were male (n=116, 58%). The mean age was 44 ± 14.6 years. One hundred forty-three patients (71.5%) were diagnosed with HE, while 57 (28.5%) were diagnosed with HS. A statistically significant association between age and HRIs was observed.
Conclusion: More HRIs are expected due to the gradual elevation of ambient temperature and the global warming phenomenon. This study emphasizes the importance of education and awareness regarding preventive measures in the general population, especially among the most vulnerable subpopulations.
Pengaruh Starter Ragi, EM4 Dan Variasi Rasio C/N Terhadap Hasil Biogas Kulit Kakao
Authors: Ridwan Iskandar , Yani Endri , Utami Lega Putri , Maulana Ifza
Published: February 2024

Cocoa is an essential ingredient for making chocolate. Still, the only part of the cocoa used to produce chocolate is the cocoa beans, while around 90% of the total weight of the cocoa is immediately discarded in the form of cocoa shells. This causes cocoa shells to become plentiful, whereas many are processed into animal feed and compost. In compost processing, a decomposition process occurs, which potentially produces biogas. Biogas production from cocoa shells can use fermentation tools such as digesters. This research method is carried out through several stages. First, cocoa shells are collected from cocoa production originating from the Lima Puluh Kota district of West Sumatra. Then, the cocoa shells are prepared and processed into raw materials for biogas production. The fermentation process is carried out using yeast starter and EM4 for 21 days of observation, which is a mixture of microorganisms. The research variation consisted of adding 150 g of yeast and increasing the volume of EM4 in each digester except the control digester. The addition of EM4 for the C/N ratio test digesters 25, 27, 29 is 0.124, 0.099, 0.083 liters. The total gas production obtained from each digester is 9.054 liters (DU29), 2.590 liters (DU27), 2.562  liters (DU25), and 1.307 liters (DK). Meanwhile, the levels of methane gas produced in each test sample are 8.77% (DK), 10.47% (DU25), 18.02% (DU27), and 21.43% (DU29). The color of the gas flame produced by the DU29 and DU27 is blue, the DU25 is red, and the DK is reddish yellow.
Studi Performa Cooling Tower berdasarkan Kualitas Air Pendingin
Authors: Yani Endri , Putra Akmal Hadi Yurihuda
Published: February 2024

Cooling water is used to cool fluids with a high temperature in a closed system, such as a cooling tower or heat exchanger. Sometimes, the cooling water is specified in a long tube, which risks fouling and rusk. This research will study cooling water quality as Total Dissolved Solid (TDS), chlorine concentration, and antiscale. In the design of the cooling tower at PLTGU Tanjung Uncang, the range or limit of the permitted TDS is 50,000. If this figure has been reached, the cooling tower must be blown down. Blowdown is water in the cooling tower that is deliberately removed to avoid the concentration of impurities during heat evaporation. At PLTGU Tanjung Uncang, the permitted chlorine concentration is in the range of 0.2-0.5. Chlorine flow in the cooling tower at PLTGU Tanjung Uncang is reversed with Cl concentration and TDS. Inject Antiscale aims to maintain cooling tower performance, which aims to be anti-rust.
Perawatan dan Analisis Kerusakan Mesin CNC Oxyfuel Cutting Koike Maxigraph D600 dengan Pendekatan Failure Mode Effect Analysis
Authors: Yanda Hendri , Putra Septian Maulana
Published: February 2024

Using a CNC oxyfuel cutting machine in the steel plate cutting process is more efficient, saves time and can increase the speed of the production process. However, CNC oxyfuel cutting machines often fail, resulting in steel plates failing to cut and causing delays in the production process. Therefore, maintenance and damage analysis on CNC oxyfuel cutting machines is very necessary. This research aims to monitor maintenance and analyze damage to CNC oxyfuel cutting machines at PT Kunango Jantan Group using the FMEA (Failure Mode Effect Analysis) method. Through this method, problems in the production process can be identified, so that machine problems can hopefully be identified early. FMEA is a methodology used to evaluate failures in a system, design, process and service. With this method, potential failure identification can be done by assigning a score to each failure mode based on the occurrence level, severity and detection level. Analysis of the seriousness level of damage is useful for analyzing the impact resulting from the damage mode. The consideration taken in determining the level of seriousness of damage is important data to determine whether the mode of machine damage has a serious impact on the production process. From the results of the Failure Mode and Effect Analysis (FMEA) analysis of the CNC Oxyfuel Cutting machine at PT Kunango Jantan, failures were identified for 6 components of the CNC Oxyfuel Cutting machine. The three components that have the largest RPN (Risk Priority Number) value and were categorized as having potential severity are the torch and nozzle (RPN=80), followed by the motor (RPN=48) and steel (RPN=40). This indicates the need for immediate repairs to avoid failures of these three components. If it is repaired too late, more fatal damage can occur and the production process can stop so that the company can experience greater losses. The D600 computer and gearbox have high severity with quite low RPN values, namely 16 and 32. This shows that if damage occurs to these two components it will not cause production to stop, but can cause a decrease in the number of production processes.
Perhitungan Waktu Baku Proses Preventive Maintenance Mesin CNC Router
Authors: Yuliandra Berry , Fidel Fadli Muhammad
Published: February 2024

An efficient preventive maintenance requires scheduling process. The first step of this process is to calculate the standard time for each maintenance activity. This research aims to calculate the standard time for preventive maintenance activities for CNC Router machines at PT X through three stages: (1) Interviews and direct observation with the relevant machine operators to obtain a list of maintenance activities, (2) measure the cycle time of each maintenance activities, (3) Calculate Standard time based on cycle time measurement data. The research results show that it takes a total of 100 minutes to carry out the daily maintenance process, 95 minutes for the weekly maintenance process, 790 minutes for the maintenance process after 2000 hours, and 1140 minutes for the maintenance process after 4000 hours. This result can be used as input for the scheduling process for CNC Router machines maintenance at PT. X.
Insights into ancient ceramic technology: a comprehensive analysis of mineralogy, chemistry and firing conditions
Authors: Mammadov S. , Ahadova A.
Published: February 2024

The intensive integration of Azerbaijan into the global economy, mainly through international gas and oil pipeline construction, has led to significant archaeological research in the past two decades. The construction of the Baku-Tbilisi-Ceyhan oil pipeline (BTC) and the Southern Caucasus Pipeline gas pipeline (SCP) prompted a four-year archaeological fieldwork program, followed by a six-year post-excavation program. The current work applied an interdisciplinary approach using various instrumental methods for studying ancient artifacts found during those projects. The thermogravimetric method and differential thermal analysis were employed to obtain insights into the production technology of the ancient pottery and information about the mineralogy of the ceramic sherds. The complex processes involved in firing the ceramic paste have been studied extensively, and patterns in mass loss ratios during different temperature ranges have been established. In total, 15 samples were investigated, and the thermogravimetric analysis of ceramic shards revealed that the firing temperature of the samples was in the range of 700 °C. XRD analysis confirmed the presence of quartz, feldspar, and clay minerals in the ceramic samples. The presence of calcite and other specific minerals is subject to the origin of the ceramic materials. The results obtained from this multidisciplinary approach provide insights into the firing technology and the origin of the ceramic samples.
Pelatihan Pengembangan Game Digital Dalam Mendorong Pertumbuhan Industri Kreatif
Authors: Kurniawan Haris , Mulyono Heri , Samudra Ami Anggraini
Published: February 2024

Pelaksanaan Kurikulum Merdeka yang masih baru khususnya di Sekolah Menengah Kejuruan (SMK) jurusan Rekayasa Perangkat Lunak (RPL) ataupun Multimedia dimana adanya pelajaran pengembangan game yang guru-gurunya belum terlalu menguasai materi dan prakteknya. Hal ini akan berdampak kepada keterampilan siswa dalam pembelajaran pengembangan game. Seiring dengan kompetensi itu tentunya juga perlu mempersiapkan lulusan SMK untuk dapat terjun kedunia kerja ataupun menjadi wirausaha di industri kreatif game ini.  Saat ini pemerintah juga mendorong generasi muda dan pelaku usaha kreatif  untuk menumbuh kembangkan kompetensi ini sebagai salah satu penyumbang pertumbuhan industri game atau ekonomi kreatif di Indonesia. Dengan permasalahan tersebut, maka perlu dilakukan upaya peningkatan keterampilan dan pemahaman dalam bentuk pelatihan di bidang pengembangan dan pemrograman game sekaligus juga pelatihan menjadi wirausaha game digital. Metode dalam pelatihan ini menggunakan model Goad. Pelatihan dilakukan dengan 5 langkah  dengan peserta siswa jurusan RPL dan Mulmedia SMK IT Al-Hidayah Pasaman Barat. Hasil dari kegiatan ini adalah kemampuan membuat game digital dan juga pemahaman tentang wirausaha digital. Jadi dengan selesainya pelatihan ini peserta sudah bisa membuat atau mengembangkan game digital serta mampu menjadi wirausaha game tentunya sebagai penyumbang pertumbuhan industri kreatif di Indonesia khususnya bagi lulusan SMK.