bluuebunny/crossref_metadata_2025 huggingface dataset:
ENERGY PERFORMANCE INDICATOR FOR HEALTH CARE BUILDING: A CASE STUDY OF A SMALL SIZED HOSPITAL IN INDONESIA
Authors: Simarmata Todo H
Published: December 2023

Energy is needed to guarantee the reliable and safe operation of healthcare buildings. The hospitals and other healthcare building energy performance have been investigated using several sets of energy performance indicators (EnPIs) formulation in several contexts. Often, those EnPIs are meaningless compared to other healthcare buildings, or they are restricted in their ability to guide energy investment planning or operation. This study examined four approaches—kWh/sqm/year, kWh/bed-day, kWh/overnight inpatient, and kWh/sum of inpatient and outpatient—for calculating EnPIs of a small-sized government hospital. The analysis focused on methods for defining EnPIs in the healthcare industry. With a value of 4.62 kWh/patient, it was found that the kWh/sum of in and outpatient was the optimal EnPI model.
ANALISIS KESESUAIAN TATA CAHAYA LAMPU LIGHT EMITTING DIODE (LED) DI RUANG KELAS PPSDM KEBTKE BERDASARKAN STANDAR SNI-6197-2020
Authors: Indarto Arief
Published: December 2023

Lampu LED telah digunakan di ruang kelas PPSDM KEBTKE yang bertujuan untuk penghematan energi dengan penggunaan daya (watt) yang rendah dan kenyamanan belajar di ruang kelas dengan intensitas cahaya lampu yang memenuhi persyaratan. Metodologi penelitian yang digunakan adalah dengan membandingkan kesesuaian temperature warna lampu, indeks renderensi warna dan hasil pengukuran intensitas cahaya serta perhitungan intensitas daya penerangan terhadap luas ruangan dan efikasi lampu dengan Standar SNI-6197-2020. Tata cahaya ruang ruang kelas telah di standarisasi sesuai SNI-6197-2011 konservasi-energi-sistem-pencahayaan sebagaimana telah di revisi menjadi SNI-6197-2020 konservasi-energi-sistem-pencahayaan. Beberapa parameter standar yang mengatur Ruang Kelas adalah tingkat pencahayaan (iluminans) ruang belajar sebesar 350 lux, intensitas daya penerangan sebesar 11,95 watt/m2, efikasi lampu LED 100–120 lumen/watt serta temperatur warna lampu warna putih netral (warm white) < 3300 s.d. > 5500Kelvin dan indeks renderasi warna minimal 80. Paper ini bertujuan untuk menganalisis kesesuaian tata cahaya Lampu LED di ruang kelas PPSDM KEBTKE dengan SNI-6197-2020 tentang konservasi-energi-sistem-pencahayaan. Hasil analisis menunjukkan tingkat pencahayaan (iluminans) ruang kelas rata rata sebesar 382 lux diatas standar 350 lux, intensitas daya lampu sebesar sebesar 2,7 watt/ m2 yang menunjukan penggunaan daya listrik per m2 sebesar 2,7 watt masih dibawah standar maksimal densitas daya lampu Ruang kelas 11,95 watt/m2 , nilai efikasi lampu sebesar 111 lumen/watt sesuai dengan standar efikasi lampu LED 100–120 lumen/watt, temperatur warna lampu LED 4000 Kelvin sesuai tampak warna putih netral (warm white ) < 3300 s.d. > 5500 Kelvin, memiliki Renderasi warna (𝑅𝑎) antara 70 s.d. 95 sesuai standar indeks renderasi warna minimal 80.
PERBANDINGAN EFISIENSI PADA BOILER II TWA PPSDM MIGAS MENGGUNAKAN METODE LANGSUNG DAN TIDAK LANGSUNG PERIODE BULAN MARET 2023
Authors: Winarto Sonden
Published: December 2023

Untuk memastikan kinerja boiler yang optimal, evaluasi efisiensi boiler pada PPSDM MIGAS sangat penting dilakukan. PPSDM MIGAS menggunakan dua metode evaluasi efisiensi boiler yaitu langsung dan tidak langsung. Metode langsung melibatkan pengukuran parameter yang berkaitan dengan pembakar bahan bakar dan produksi uap, dari analisis yang dilakukan menggunakan metode langsung nilai efisiensi boiler di PPSDM MIGAS sebesar 77,63%. Sedangkan sedangkan metode tidak langsung dilakukan dengan mengukur parameter seperti suhu gas buang dan komposisi gas buang, dari analisis yang dilakukan menggunakan metode tidak langsung didapati hasil nilai efisiensi boiler sebesar 76,22%.
STUDY KELAYAKAN HEAT EXCHANGER 03 KILANG PPSDM MIGAS
Authors: Widiyantoro Rahmanto
Published: December 2023

Pusat Pengembangan Sumber Daya Manusia Minyak dan Gas Bumi terdapat kilang minyak kapasitas pengolahan 320 m3 per hari, hasil produk pengolahan kilang ini yaitu pertasol CA, pertasol CB, pertasol CC, solar, dan residu. Salah satu sarana alat yang digunakan dalam proses pengolahan adalah heat exchanger merupakan peralatan yang berfungsi untuk pertukaran energi antara aliran fluida berbeda suhu melalui kontak langsung maupun tidak langsung. Terdapat lima heat exchanger yang ada di kilang ini, salah satunya heat exchanger 03 (HE-03). Heat exchanger 03 ini sudah berumur maka perlu dilakukan penelitian dan analisis kelayakan perlatan ini. Dengan metode penelitian berupa studi lapangan dan studi pustaka, berupa pengambilan data kondisi operasi di Distributed Control System (DCS) dan secara riil data lapangan menggunakan Piping & Instrumentation Diagram (P&ID) sehingga dapat menghitung fouling factor, pressure drop dan efisiensi heat exchanger 03. Berdasarkan hasil perhitungan nilai Rd yang didapatkan pada Heat Exchanger 03 sebesar 0,1307 hr.ft2.oF/Btu. Besarnya nilai fouling factor (Rd) ini menunjukan adanya kotoran yang terakumulasi di dalam Heat Exchanger. Pressure Drop yang diperoleh pada shell yaitu sebesar 0.0003 Psí sedangkan pada tube sebesar 0,0005 Psi. Hasil perhitungan efektivitas kinerja Heat Exchanger 03 sebesar 83,77%. Dari hasil perhitungan menunjukan bahwa heat exchanger tersebut dinyatakan masih layak dioperasikan karena tidak melebihi standar batas yang diperbolehkan.
Manajemen Kepala Sekolah Sebagai Penggerak Mutu Pendidikan di Madrasah Aliyah Darul Ulum Kubu Raya
Authors: M. Jali
Published: December 2023

Driving schools and school principals are the foundation of hope for education, and teachers are the driving force to achieve the goals of quality education. The school principal's leadership is a determining factor in driving organizational change and management in schools; its existence is not only a symbol but also a determinant of the success and quality of education in schools. This research aims to determine the management of school principals as a driver of educational quality at MA Darul Ulum Kuala Dua. This research uses a qualitative approach with a descriptive research type. Data collection techniques were carried out using interviews, observation, and documentation. Primary data sources are principals, and secondary data sources are teachers, students, books, and relevant research journals. The results of this research show that the Principal of MA Darul Ulum School can improve the quality of education based on the following points: human resource management, student management, building and yard management, and the principal's supervisory duties.
Journalists' Objectivity via Social Media: Jordan
Authors: Al-Zoubi Omar , Ahmad Normahfuzah , Tahat Khalaf
Published: December 2023

Journalists play an essential role in society through their daily news practice. The news produced must be correct. Fair and balanced reporting makes an informed public. These elements are part of objectivity in the news. However, social media have challenged many aspects of journalism. With the emergence of social media platforms, journalists have become more prone to deviating from journalistic objectivity. Instantaneity has challenged many journalists to practice their journalistic work objectively via social media. This study aims to identify the challenges Jordanian journalists face in implementing objectivity on social media platforms. In-depth interviews were conducted with 11 journalists working in various Jordanian news organizations. Thematic analysis was used to reach the results. This study expands current knowledge on journalistic practice in Jordan, particularly on social media and objectivity in news reporting. Findings from this study suggest two main challenges faced by Jordanian journalists in their social media use. Firstly, journalists are challenged by the lack of clear guidelines and policies to separate official and personal views. Secondly, complex features embedded within social media settings along with the behavior of its users further add to the challenges faced by journalists in Jordan as they employ objectivity in news reporting.
KEYWORDS
Jordanian journalists, journalistic objectivity, journalists’ challenges, news organizations, news platforms, social-media practices
Audit Input and Accounting Conservatism Among Listed Firms in Nigeria
Authors: Mamidu Aruna Ishola , Oladutire E. O.
Published: December 2023

This study investigated the effects of audit quality characteristics in areas of audit independence, audit firm size and audit tenure on accounting conservatism among listed firms in Nigeria. The study used longitudinal and correlation research designs. The population of the study consists 151 firms listed on the Nigerian Exchange Group as at 31st December, 2022. Statistics was analyzed using descriptive in addition to inferential statistics and panel data regression analysis. The results revealed that audit independence had significant positive effect {0.138(0.004)} on accounting conservatism, audit firm size had significant negative effect {-0.0623(0.050)}, while audit tenure had a positive but insignificant effect {0.110(0.494)}. The study recommended that firms in Nigeria should be conscious of the quality of the mechanism imputed into audit engagement in order to ensure audit quality as it has implication on quality of output. Firms should also not compromise audit independence in order to present globally accepted financial reports.
Artificial Intelligence Adoption and Corporate Operating Activities of Deposit Money Banks
Authors: Salemcity A. , Aiyesan O.O. , Japinye A.O
Published: December 2023

The deposits money banks (DMBs) in Nigeria that invested artificial intelligence (AI) were considered in this study with the objective to know the effect of AI on employee cost and other operating cost in the banking sector. The study adopted ex-post facto research design. Secondary data were gathered between 2012 and 2022 from the respective financial statements of the DMBs and analyzed using panel regression model. It was gathered that the adoption of AI has negative effects on employee cost while it has positive effects on operating expenses of DMBs in Nigeria. The study concluded that the adoption of AI by DMBs in Nigeria will improve their corporate operating activities which will translate to improve financial performance. Government should regulate the activities of DMBs to forestall any form of laying-off.
Fluctuating Exchange Rate and Nigeria’s Economic Growth: A Time Series Assessment of Over Three Decades’ Experience Using Interest Rate and Inflation Rates as Control Variables
Authors: Okoroigwe Ejike Sunday , Obilikwu James , Sayedi Shuaib Ndagi , Yusuf Abdullahi Babandako
Published: December 2023

This study examined the empirical investigation of the effect of fluctuating exchange rate on Nigeria’s economy from 1986 to 2021. The specific objective is to determine the combined effects of exchange rate, inflation, interest rate on gross domestic product and the individual effect of exchange rate, inflation, interest rate on the gross domestic product. The data were obtained from the Central Bank of Nigeria (CBN) Statistical Bulletin and National Bureau of Statistics. The regression analysis to provide meaning to the research through which the following findings were made; this study depicts on exchange rate, inflation rate, and interest rate contribution to gross domestic product. The consequences of this examination have demonstrated that exchange rate, inflation rate, and interest rate are serious determinants of gross domestic product in the Nigerian Economic Growth. The factors (exchange rate, inflation rate and interest rate) when presented synonymously, have performed well regarding economic growth. The finding suggested that exchange rate, inflation rate and interest rate are determinants of gross domestic product. A practical assessment of these dimensions revealed that exchange rate, inflation rate and interest rate were effectively stabilized and they will achieve a greater significant benefit in terms of gross domestic product. The result shows that, the higher stability of exchange rate, inflation rate and interest rate the higher the possibility of gross domestic product of Nigeria, which will definitely have positive significant impact on economic growth of Nigeria.
Risk Management Committee Gender and Likelihood of Financial Distress of Listed Deposit Money Banks in Nigeria
Authors: Ibiamke Sylvia Sewuese , Tauhid Suleiman , Okpanachi Joshua
Published: December 2023

This study explores the effect of risk management committee gender diversity on the likelihood of financial distress among listed deposit money banks in Nigeria. The study utilizes the Nigerian Code of Corporate Governance 2018 as an instrumental variable to address endogeneity concerns related to the self-selection of gender diversity on the risk management committee. The dependent variable is the likelihood of financial distress, while the independent variable is the gender composition of the risk management committee. The sample size consists of 12 listed deposit money banks, and the data covers the period from 2017 to 2021. The analysis employs a two-stage regression analysis technique. The findings of this study reveal a significant positive effect of risk management committee gender on the likelihood of financial distress among listed deposit money banks in Nigeria. This suggests that a higher representation of a particular gender in the risk management committee is associated with an increased likelihood of financial distress. The results have important implications for policymakers, regulators, and banking institutions in Nigeria. The study highlights the need to consider gender diversity in risk management committees as a potential driver of financial distress. The findings call for proactive measures to promote a more balanced gender representation and inclusion in corporate decision-making processes within the banking sector. The findings emphasize the significance of gender diversity in risk management practices and provide valuable insights for stakeholders seeking to enhance risk assessment and mitigate the occurrence of financial distress in the banking sector.
The Effect of Asset Quality on Systemic Risk: The Case of the Egyptian Banks
Authors: Atta Atta Aid
Published: December 2023

This study examined the effect of asset quality on systemic risk of Egyptian banks. The specific objectives determined the effect of asset quality on commercial loans, asset financing, vendor financing of Egyptian banks. The study adopted a descriptive research design approach where the target population included the 10 Egyptian banks for the period 2015-2020. The study used secondary data that was extracted from the websites of the respective commercial banks. The study used panel regression analytical model. The study concluded that asset quality affected commercial loans, asset financing, vendor financing and of Egyptian banks in a positive and significant way. The study recommended that the Egyptian banks should focus on reducing the level of nonperforming loans because when diversifying the loan portfolio where there is a high credit risk. The study recommended that the Egyptian banks to be sure that the collateral is protected and will not deteriorate, this costs the bank money. Lastly, the study recommended banks should develop comprehensive strategic plans detailing on how they will deal with non-performing loans in their occurrence in a systematic way.”
Assessment of Phyto-Remediation Quotient of Cultivated Waterleaf Talinum Triangulare on Soil Contaminated With Sodium Arsenate Pesticide
Authors: George Daye Mandy C. , Dimkpa Stanley Obumneke N. , Elenwo Chinyere E. , Boisa Ndokiari
Published: December 2023

The potential of Waterleaf Talinum triangulare to abstract and consequently remediate As from As-pesticide contaminated soil was investigated by pot experiment and the concentration of As in the plant and soil was determined through mass plasma atomic emission spectroscopy (MP-AES). The composite soil in two separate groups of pots was spiked with 50 mg/kg and 70 mg/kg disodium arsenate pesticide and stands of Waterleaf were grown on them over a 9 weeks growth period. The plant parts (leave and root) and soil after harvesting were pretreated, acid digested and subjected to MP-AES analysis. The results depicted that As concentrations in the plant parts differ at all the treatment levels over the graded period of growth for frequency of harvest and time of harvest and exceeded the maximum permissible limit established by FAO/WHO, and makes the plant unfit for human and animal consumption. The experimental results revealed a statistically significant difference (p<0.05) in the bioaccumulation of As over the graded period of growth at all the treatment levels. The Bio-accumulation factor (BAF) and Bio-concentration factor (BCF) were generally greater than unity (BAF > 1 and BCF > 1) in all treatment levels at the time of harvest which indicates that Waterleaf is suitable for phytoextraction and phytostabilization. However, BAF < 1 and BCF < 1 were observed in the 3rd week and 9th week in the frequency of harvest. Furthermore, Translocation factor (TF <1 and TF > 1) were observed for frequency of harvest and time of harvest, implying that the plant can serve as a bad and good accumulator of As in contaminated soil for phytoremediation if the plant is frequently harvested or allowed to fallow. TF > 1 means that the vegetable will be suitable as a good phytoextractor. It can, therefore, be concluded that Waterleaf can be used for commercial and environmental friendly phytoremediation technology (Green technology) to clean up As polluted sites and environmental monitoring.
Women Participation in Poultry Production. The Case of Ada’a, Lume and Akaki, East Shewa, Ethiopia
Authors: Gudeta Abune
Published: December 2023

Women play essential roles in agriculture; providing inputs, working in the farm, generating off-farm income and doing the unpaid house chores, but often the gains go to the husband and children. Ethiopia is representative of countries where village poultry plays a dominant role in total poultry production. women generally contribute more labor inputs in areas of feeding and grazing of cows, watering, manage vulnerable animals (calves, small ruminants, and sick, injured and pregnant animals), cleaning of barns, dairy-related activities (milking, butter and cheese making), gathering and making dung cakes, transporting farm manure, egg collection, and sale of egg/poultry, than men and children. However, few recognitions have been given to women’s contribution to agricultural production. The study was aimed to assess the level of women participation in poultry production. The study went further to identify access and benefit of women from poultry products. Data was collected using semi- structured interview and analyzed using simple descriptive statistics. The study found that house construction was the only activity in which women participation is less than their men counter parts. Women take part in all activities concerning poultry production. Majority of the respondents 86.7% carried out watering poultry and collecting eggs followed by house cleaning 80% and recording events 80%. Taking products to market, selling products and holding money from poultry product sale are the major activities done by women by 73.3%. Based on results further researches need to be done in order to magnify the contribution of women in agricultural production.
Estimation of a Logistic Regression Model to Determine the Effects of the Factors Associated with the Likelihood of Skilled Workers in the Garment Sector of Bangladesh
Authors: Hossain Md. Sharif
Published: December 2023

This study attempts to estimate the logistic regression model to find the factors associated with the likelihood of skilled workers in the garment sector of Bangladesh. The study is based on primary data. From the maximum likelihood estimates of the logistic model, it is found that the variables, years of education, years of experience, wage rate, grade, and working years at the present company have significant positive effects on the logit of the outcome variable Y, but the variable age of the companies has a significant negative effect. From the estimated odd ratios, it can be said that the male group is 3.0695 times more likely than the female group to be a skilled worker, which is significant at a 10% level; a group of rural workers is 10.3727 times more likely than the urban group in favour of skilled workers, which is significant at a 15% level; a group of workers have a training program degree is 38.5552 times more likely in favour of skilled workers, than a group of workers who have not, which is statistically significant at any significance level. The estimated results of squared correlation between Y and , pseudo-R2, Mcfadden’s , Maddala’s , and Count-R2 support that the model fits the data very well. Based on the findings, different policies are formulated for the sustainable development of Bangladesh's garment sector.
Analysis of Perishable Goods Transportation
Authors: Igilar Chidinma
Published: December 2023

This study examines the analysis of perishable goods transportation in the context of supply chain management. The objective is to identify and examine the factors that impact the quality and cost-effectiveness of transporting goods with limited shelf life. This study emphasizes the importance of accurate data collation, tracking, risk assessment and mitigation, collaboration and communication amongst stakeholders, suitable infrastructure and equipment, and continuous improvement and assessment on industry standards. These factors are critical for optimizing the perishable goods transportation process and ensuring the freshness and quality of products at every stage in the supply chain. The research findings contribute to a deeper knowledge of the challenges and possibilities associated with perishable goods transportation, enabling companies to make informed decisions and implement powerful strategies to enhance their operations.
Effect of Organizational Culture on Employee Performance: A Survey of Selected Public Sector Organizations in Enugu
Authors: Etalong Thomas Alama , Chikeleze Francis Okechukwu
Published: December 2023

Employee performance is significantly impacted by organizational culture because it helps employees match their goals with the organization's overarching objectives. This helps ensure that public organizations uphold their obligation to provide end users with necessary services. This study's main goal is to explore the relationship between organizational culture and employee performance. It does this by employing both descriptive and exploratory research designs using both primary and secondary instruments to collect data. 100 employees of the Enugu State Ministry of Finance and Economic Planning, the Enugu State Civil Service Commission, the Enugu State Economic Planning Commission, and the Office of the Head of Service completed a structured questionnaire that served as the primary data source. While secondary data came from government papers, textbooks, the internet, and journal publications. Statistical Package for the Social Sciences (IBM SPSS) was used to analyze the collected data and evaluate the hypotheses. The analysis's findings indicate that organizational norms have a significant impact on employee commitment within an organization in terms of professional growth and development, recognition and rewards for good performance, clear communication of the organization's goals and values, and a positive work environment. Additionally, a well-structured work routine has a significant impact on how much work is completed by employees by improving productivity, time management, and work quality. The study makes the urgent recommendation that the Ministries, Departments, and Agencies (MDAs) under review establish and uphold strong organizational norms that encourage employee commitment with a particular focus on professional growth and development, recognition and reward for good performance, clear communication of organizational goals and values, and a positive work environment that fosters performance. It's important for leaders to be aware of their preferred styles and to adapt them as necessary to create a positive and productive work environment. Ministries, Departments, and Agencies (MDAs) should promote employee delivery on workload with a view to ensuring productivity, time management, and adaptability.
Linfoma Cutaneo B Tipo Pierna: Cuando la Piel Esconde una Enfermedad Grave
Authors: Bolivia Bayancela Bertha , Castillo Soto Gladys Katiuska , Salazar Malliquinga Monica , Castillo Soto Gladys Cleotilde , Sandoval Rivera Jessica Maribel
Published: December 2023

El linfoma de células B tipo pierna es una enfermedad seria que requiere una atención médica temprana y un tratamiento adecuado, que afecta principalmente a los tejidos de las extremidades inferiores, como los músculos y los tejidos blandos. Se considera como un grupo específico de linfoma a partir del año 1980. Aunque es una entidad clínica poco frecuente, es importante comprender su patología, factores de riesgo y tratamientos disponibles, es posible mejorar la calidad de vida de los pacientes y lograr una mejor prognosis a largo plazo, y de esta manera garantizar un enfoque adecuado para los pacientes afectados.
Lived Experiences of Teachers in the Transition From Face-To-Face to Virtual Class During the Covid-19 Pandemic
Authors: Vera Candela Gary Anibal , Almache Granda Gabriela Katherine
Published: December 2023

At the beginning of 2020, teachers had an unexpected experience. The COVID-19 pandemic forced teachers to change their way of teaching from face-to-face to virtual. The purpose of this study was to explore the challenges faced, and the strategies used for online teaching by teachers during the transition from face-to-face to virtual classes. Moreover, interpret if teachers were prepared to start virtual classes. Using a qualitative approach, a questionnaire and an interview were applied. The sample consisted of 6 volunteer teachers from different subjects for the interview and 40 teachers for the questionnaire. The challenges revealed by the interviewees were Poor connection, Lack of student resources, and Mastery of digital tools. Regarding the strategies, Role-Playing, Presentation, Repetition, and Learning based on problem-solving were used. Finally, the results of the questionnaire showed that the majority of the teachers were prepared to start virtual classes. Considering the reviews of other similar studies and the results in this study, certain implications could be mentioned. Although the teachers were able to overcome the challenge of virtual classes, it was evident how complex the transition was. It is necessary to keep in mind that virtuality is here to stay and the online classroom will continue to be part of the teaching and learning process. Therefore, training for teachers should be included not only on the use of technology but also on strategies for effective online teaching.
Komparasi Skema Numerik Euler, Runge-Kutta dan Adam-Basforth-Moulton untuk Menyelesaikan Solusi Persamaan Osilator Harmonik
Authors: Resmawan Resmawan , Rosydah Binti Mualifatul , Handayani Rizka Putri
Published: December 2023

This article discusses the comparison of different numerical schemes to visualize the solution of 2nd-order differential equations. One-step methods such as the Euler method and the 4th-order Runge-Kutta method are combined with the 3rd-order Adam-Bashforth-Moulton method to solve the solution of 2nd-order differential equations. This combination of methods solves the Harmonic Oscillator equation, an 2nd-order differential equation widely applied in various oscillation contexts. The order of accuracy and order of approximation error are determined analytically. Finally, simulations are given with different steps for the three methods to confirm the behavior of the solution to the Harmonic Oscillator equation. The results show that the Euler method with the lowest order of accuracy has good accuracy at the beginning of the oscillation but not when time t is increased. The Runge-Kutta method, with the highest order of accuracy, shows excellent and consistent accuracy and solution stability, while the Adam-Bashforth-Moulton method, although it has a lower accuracy than the Runge-Kutta method of order 4, can be improved by choosing a one-step method with a high order of accuracy to approximate some of the required initial solutions. All three methods can provide approximation values with excellent accuracy and stability if a small step, h, is chosen, but this step can increase the time duration to display the solution. Thus, it is necessary to choose the right h according to the context of the equation and the method used to obtain accurate solutions with optimal time duration.
Model Course Review Horay : Upaya Meningkatkan Hasil Belajar Matematika Bentuk Aljabar
Authors: Dangkua Sri Rahayu , Resmawan Resmawan , Zakiyah Siti
Published: December 2023

This research aims to improve students' mathematics learning outcomes in the Algebraic Form material using the Course Review Horay learning model. This study is a classroom action research (CAR) conducted in two cycles, involving students from SMP Negeri 1 Kabila as the research subjects. Each student is considered successful if their mathematics learning outcome test meets the minimum completeness criteria, which is 75. The research results show that in the first cycle, the completeness rate was 67.86% out of 28 students, and it increased in the second cycle, with 24 students achieving a completeness rate of 85.71%. This indicates that implementing the Course Review Horay learning model is believed to improve students' mathematics learning outcomes in the Algebraic Form material.
Analisis Kesalahan Mahasiswa dalam Menyelesaikan Permasalahan Aljabar Boolean Berdasarkan Teori Kastolan
Authors: Sari Dian Kartika
Published: December 2023

Boolean algebra is a branch of mathematics that has many applications, especially in computer science, engineering, and information technology. Boolean algebra is one of the materials taught in discrete mathematics courses. However, students still feel that this material is quite difficult. Therefore, the solution to this problem is to analyze/describe the difficulties students feel. This research aims to describe students' mistakes in solving Boolean algebra problems based on Castolan theory. This study uses a qualitative method. The research subjects were 43 Informatics Engineering students at the Telkom Institute of Technology Purwokerto 2022/2023. The data collection technique uses a Boolean algebra ability test. Data were analyzed based on the Castolan error procedure. The results of this research showed that the percentage of conceptual errors was 33%, the percentage of procedural errors was 23%, and the percentage of technical errors was 44%. Several factors that cause students to make mistakes when solving problems include: 1) Students' lack of understanding of the problems they face, so they become confused when trying to solve them; 2) Lack of accuracy in the calculation process, which causes errors in their answers; 3) Students' inability to convert problems into mathematical models; 4) Lack of student knowledge about the stages needed to solve problems. Lecturers can utilize the results of this research to develop more effective teaching strategies and support students in overcoming difficulties they may encounter.
Analisis Dinamik Model SIRC pada Transmisi Hepatitis B dengan Sirosis Hati
Authors: Febriyanti Ririn , Prihandono Bayu , Kiftiah Mariatul
Published: December 2023

Hepatitis B is an infection of the liver that can cause liver cirrhosis. Liver cirrhosis can occur due to the formation of scar tissue in individuals who have prolonged hepatitis B. Transmission of hepatitis B can occur in two ways, namely horizontal and vertical. In this research, this problem is modeled in a mathematical model using the SIRC model, where the population is grouped into four sub-populations, namely susceptible (S), infected (I), cured or immune due to vaccination (R) and cirrhosis. liver (C). From the analysis, two equilibrium points were obtained, namely the disease-free equilibrium point the endemic equilibrium point  The basic reproduction number   is obtained using the Next Generation Matrix. The analysis results show that if , then the disease-free equilibrium point is locally asymptotically stable, which means that hepatitis B transmission in liver cirrhosis does not spread. Meanwhile, if  , then the disease-free equilibrium point is locally asymptotically stable, which means that hepatitis B transmission in liver cirrhosis does not spread. Meanwhile, if , this means that hepatitis B transmission in liver cirrhosis is influenced by contact between susceptible and infectious individuals. To support the results of the analytical analysis, numerical simulations are provided to describe the behavior of the SIRC model.
Arithmetic Mean Derivative-Based Quartet Midpoint Rule
Authors: Marjulisa Rike , Putri Ayunda
Published: December 2023

A definite integral that is difficult to solve analytically can be calculated using the numerical integration methods. The midpoint rule is a prominent rule for approximating definite integrals. This article discusses a version of the quartet midpoint rule that includes the derivative of the arithmetic mean . The proposed rule increases precision over the previous rules. Furthermore, the error term is obtained by using the concept of precision between quadrature and exact values. Finally, the proposed rule is more effective than the present rule, according to numerical simulation results.
Integrated Assessment of MIG Welding Parameters on Carbon Steel using RSM Optimisation
Authors: Junita Mohd Said  , Faiz Mohd Turan  , Norazlianie Sazali
Published: December 2023

This study examined how parameter optimisation in MIG welding affects material properties, weld quality, flexural strength, and weld bead geometry using an experimental design. Structural testing reveals that weld pool imperfections, especially in welded joints, often lead to metal failure. Incorrect selection of welding parameters, material weldability, and metal forming contribute to defects and necessitate post-treatment. The study aims to minimize weld defects and maximize material strength in welded parts using a quadratic second-order regression model to predict optimal process parameters. The chosen JIS G3131 hot-rolled carbon steel material is commonly used in automotive parts, is cost-effective, and can be easily welded. The welding process is MIG buttweld according to AWS 1.1 standards. The tests match the RSM design's 3-by-3 orthogonal array. The process parameters are welding current, arc voltage, and welding speed. The responses are bead height, bead width, penetration, and flexural strength. NDT X-ray radiography detects flaws in weld pools. The welded connection's durability is determined with a three-point bending test. Experiments are conducted to find the best input parameters with 95% confidence. This study also uses an experimental design based on an orthogonal array and an analysis of variance (ANOVA). Contribution to factors and regression analysis. The predicted flexural strength was 903.1 MPa, with a 0.66% error compared to the experimental value of 897 MPa. Predicted values for weld penetration, bead width, and bead height are 3.01, 9.45, and 2.04. In the RT inspection test, the test sample with the optimum parameters had no defects in the welded joint. The optimal parameter values for the regression analysis of the RSM combination are 115, 20, and 18 for current, speed, and voltage. Confirmation tests for DT and NDT were performed to validate the optimal parameter settings. This research shows that optimizing process parameters for welded products improves weld geometry and flexural strength. This method is widely used and valuable in metal fabrication.
Effect of Vibration on Mechanical Properties in Sand Casting Process using Organic Binder
Authors: Shah Alam Bhuiyan  , Anayet U Patwari  , Wasib U Navid  , Rahman M Morshed  , Sakib A Showkhin
Published: December 2023

Casting setups must create the components with a short lead time in today's highly competitive world market. This essential industry now demands defect-free castings with low production costs. Rejection of casted products is caused due to defective components which are influenced by various factors which includes process parameters, all of which can be optimized to improve the quality of the casted products. In this study, an experimental approach was made using vibrated assisted techniques to assess the applicability of the method and improvement of the quality of the casted parts using organic binders in terms of mechanical properties especially the tensile strength, hardness and micro-structure of the products. After investigations, it has been observed that with the influence of vibration frequency at 40 Hz with amplitude 2 V the tensile strength has been improved from 176.60 MPa to 180.81 MPa, hardness improvement from HB33 to HB36 and uniformity in the micro-structure has been observed.
Simulation of Energy Dissipation in BLDC Motor and Analysis of Speed-Acoustic Characteristics
Authors: Kardile Balasaheb Annasaheb  , Khizar Ahmed Pathan  , Abhijeet Bhikashet Auti  , Sher Afghan Khan
Published: December 2023

The hybrid electric vehicle combines dual propulsion systems: one employs the traditional internal combustion engine, while the other utilizes a PMDC or BLDC motor. Generally, BLDC motors exhibit an efficiency of 85% to 90%. Conversely, the PMDC motor inherently achieves an efficiency of 88% under optimal running conditions. Moreover, improving the efficiency of both motors is impeded by their design constraints. Power losses in these motors primarily stem from factors such as heat generation in the rotor (I²R losses), bearing friction, vibrations, and noise. This paper aims to investigate energy loss in a 4 kW BLDC motor manufactured by Bosch, attributable to speed-induced acoustic noise effects. Harmonic analysis of the phase current reveals the presence of odd-order harmonics, specifically those below the 11th order, resulting in current ripples. These dominant harmonic frequencies interact, ultimately generating noise and consuming a certain amount of power. These predominant frequencies correlate with fundamental electrical parameters: current frequency (Hz), RMS current (A), and threshold (%r), all associated with the motor's input power source. The 'K' factor, a parameter dependent on these three electrical factors, is calculated to determine harmonic stability. Variations in stable speeds (ranging from 1280 to 7500 RPM) are used to record 'K' factor readings. Based on IEEE Standard 85-1980 guidelines, motors are classified as either acceptable (OK) or not acceptable (not OK) according to their harmonic stability 'K' factor. Readings for each speed step are captured at a specific predominant frequency, facilitating subsequent comparisons. To validate the experimental findings, MATLAB/Simulink and a Fluke scope meter are employed to conduct power analyses for each motor, thus assessing energy loss attributed to noise. The waveform of the phase current proves instrumental in quantifying energy consumption in the BLDC motor. Notably, higher-frequency noise waves with shorter wavelengths entail greater energy consumption. Evaluating energy loss significantly contributes to the analysis of BLDC motor speed acoustics, serving to inform the design of energy-efficient hybrid electric vehicle models powered by BLDC motors, which are intended for customer service.
Crack Propagation Analysis of Fatigue Due to External Corrosion on the Construction of the Ferris Wheel in Alun-Alun Kota Batu
Authors: Nur Subeki  , Achmad Fauzan Hery Soegiharto  , Andi Firkriyanto  , Nadiaseptria Gidiazalia
Published: December 2023

Ferris wheel is the main structure of the form from steel structure; its strength is directly related to the safety of passengers. The risk of failure due to fatigue occurs in the support pipe rods due to defects with external corrosion and cracks due to stress concentrations. Checking the crack indication at the defect point is carried out using the Liquid Penetrant Test method. Based on the inspection results, crack indications occurred at four defect location points. From the stress calculation, the value of the stress intensity factor is obtained at 4.52 Mpa√m, which still meets the fracture toughness value of 69.19 Mpa√m, from the results of the calculation of fatigue analysis, namely in the form of fatigue life at the defect location at each crack point. The structure's life span in the most resounding crack is six years, according to the minimum allowable thickness of DNV RP F01, which is 70% of its thickness. Cracks will continue to spread to structural defects with corrosion. The risk of failure will continue to increase; even total loss of the structure will undoubtedly occur if it has passed its operational design period and will be faster with dynamic loads.
Comparison between Lithium Substitution and Doping on the Physical and Piezoelectric Properties of Lead-Free BCZT Ceramics
Authors: Haziqah Fadhlina Md Hussain  , Atiqah Mohd Afdzaluddin  , Zalita Zainuddin  , M.N.M Ansari  , Subramanian Jeyanthi
Published: December 2023

Defects generation in ceramics by element substitution or doping may improve their properties. However, different results will be obtained even though the same element is involved due to different mechanisms. Ceramics Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCZT) is one of the potential candidates to replace lead-based material PZT. However, the conventional method requires high-temperature calcination and sintering process to synthesize this material. Thus, Lithium (Li) can act as the sintering aid to lower the temperature at the same time, the properties of piezoelectric can be enhanced. In this paper, the structural, physical, and piezoelectric performance of lead-free Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCZT) ceramics with Lithium Li substitution and doping, synthesized by the solid-state reaction method were studied. The substitution of Li increases the density, ρ and piezoelectric coefficient, d33 of BCZT which are 4.075 g/cm3 and 304.6 pC/N, respectively. These results demonstrate that Li substitution is more beneficial to the piezoelectric properties than doping because it produces higher grain boundary resistance and activation energy and has lower conductivity than doping. This can provide a definite strategy during the chemical composition design and manufacture of BCZT ceramics.
A Hybrid of NHPP and Generalized Gaussian Mixture Model: A Combinatorial Approach for Background Elimination
Authors: Ch Lavanya Ratna  , Y Srinivas
Published: December 2023

For background removal, a software reliability model based on NHPP's combinatorial method and parametric modeling using the Chimp Optimization Algorithm (ChOA) and Generalized Gaussian Mixture Model is proposed in this paper. A novel combination of ChOA and GGMM algorithms with the NHPP strategy is devised to solve the major shortcomings of the original algorithms. The model is examined using the provided data set (COCO 2017). This methodology demonstrates how the suggested work more successfully recognizes background photos. The evaluation of the results is done by using several metrics like Accuracy, Recall, Precision, F-Score, Peak Signal Noise Ratio, and Mean Square Error. The outcomes are evaluated against several models based on frame differences, adaptive background removal, adaptive frame differences, and the Gaussian mixture model.
Comparative Analysis of Inventory Management System with Two-Phase Time-dependent Demand and Shortages under Tolerable Slack of Payment for Deteriorating Goods
Authors: Saranya Palanivelu  , Ekambaram Chandrasekaran
Published: December 2023

In actual commercial transactions, the supplier frequently gives the merchant a maximum permitted settlement delay in order to boost sales. In order to account for these variations and assume time-varying holding costs and shortages, this research analyses a time-dependent two-phase ramp curve demand under the allowable slack of payment model for goods with a limited life span. The demand rate for the nonlinear ramp curve is deterministic, changes over time until a pivotal moment, and remains constant. It is presumed that the breakthrough point happened within the cycle duration. Two scenarios are considered: One is that the slack of the payment period is shorter than the demand turning point, and on the other hand, the payment defer period is higher than the demand turning point. The outcomes of numerical results are used to compare the best optimality. The sensitivity analysis is then employed to exhibit the extent of the applicability of the inventory parameters.
Analysis of Food Holder Design Parameters based on Fused Deposition Modelling (FDM) using Design of Experiment Method
Authors: Ahmad Shah Hizam Md Yasir  , Nor Aiman Sukindar  , Sharifah Imihezri Syed Shaharuddin  , Muhammad Afif Md Azhar  , Insyirah Inani Hasan  , Ahmad Bukhari Ramli
Published: December 2023

The limitations of food holders available in local food manufacturer companies make it difficult to produce varieties of the food pouch size. Since each size of the pouch requires a specific size of food holder, therefore, this paper aims to analyze and design of a new food holder for a food pouch with a 500g capacity to be used in the filling machine. The pouch, conveyor, and ball plunger were analyzed to help in designing the food holder. Then, critical criteria were identified such as the food holder’s height, elbow length, and slotting length. After analyzing all the critical criteria, the design of experiment method (DOE) was used to identify significant parameters in designing the food holder. A dry run was done to test the holder, and as a result, it was identified that the food holder height was the most significant criteria, but other criteria also played an important role in the food holder.
Development of BlockScholar as an Educational Mobile Application on Blockchain Technology
Authors: Aziah Asmawi  , Ezzah Mawadah Saifulbahri  , Noor Afiza Mohd Ariffin
Published: December 2023

In the ever-evolving landscape of technology, blockchain emerges as a transformative force, reshaping digital transactions and decentralized systems. This revolutionary technology, initially synonymous with cryptocurrency, has transcended its roots, becoming a pivotal element in industries spanning finance, supply chain management, healthcare, and more. However, understanding blockchain's intricacies can be daunting, especially for newcomers. This project addresses the need for an accessible and engaging platform to introduce individuals to blockchain technology. Traditional educational resources like textbooks have lost their appeal in today's digital era, leaving learners seeking interactive and mobile-friendly alternatives. While online educational platforms like Udemy and Coursera offer diverse courses, they often lack the immediacy and interactivity that modern learners crave. In the mobile landscape, a noticeable gap exists in educational apps dedicated to blockchain technology. Existing options tend to focus on cryptocurrency, falling short in delivering immersive learning experiences. This project aims to bridge this gap by developing an educational mobile app centered on blockchain technology. The app's primary objective is to offer an interactive and engaging environment for users to explore blockchain's fundamentals, applications, and advantages in a user-friendly manner. By harnessing the ubiquity and convenience of mobile devices, our project seeks to empower learners to delve into the world of blockchain technology. In doing so, we aspire to foster a more informed and tech-savvy community, equipped to comprehend the far-reaching implications of blockchain on various industries. In summary, this project endeavors to unlock the potential of blockchain technology to revolutionize education by creating a mobile app that facilitates the exploration of this transformative field. Through interactive learning experiences and accessible content, we aim to empower individuals to grasp the significance of blockchain and contribute to a more knowledgeable and technologically adept society.