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All Journal KEUNIS JURNAL ILMIAH AKUNTANSI UNIVERSITAS PAMULANG Automotive Experiences Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Journal of Artificial Intelligence and Digital Business Journal of Mechanical Engineering and Fabrication
Marliyati Marliyati, Marliyati
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Application of a PEM Fuel Cell Engine as a Small-Scale Power Generator for Small Cars with Different Fuel Concentrations Herlambang, Yusuf Dewantoro; Sulistiyo, Wahyu; Margana, Margana; Apriandi, Nanang; Marliyati, Marliyati; Setiyo, Muji; Shyu, Jin Cherng
Automotive Experiences Vol 6 No 2 (2023)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.9225

Abstract

A fuel cell power generation system is a renewable energy system that works based on electrochemical processes and produces a direct electric current (DC). Specifically, a Proton Exchange Membrane (PEM) Fuel Cell can operate at low temperatures and produce an efficiency of around 40-60%. In this study, the performance test of the PEM Fuel Cell for power generation was carried out by supplying hydrogen gas using hydrogen from the electrolysis of the hydrogen generator with a variation of KOH catalyst solution with a concentration of 0.5 M; 1.0 M; 1.5 M; 2 M and using Ultra High Purity (UHP) hydrogen with various flow rates of 250 mL/min, 300 mL/min, 350 mL/min, 400 mL/min, 450 mL/min, and 500 mL/min. The test results showed that the output power of hydrogen produced by the electrolysis process was 10.8 W at a concentration of 1 M solutions at an input current of 20 A. The greater the concentration of the catalyst solution, the smaller the electrical power required for the electrolysis process. However, the hydrogen power supply produced by the hydrogen generator was not optimal, so it did not meet the needs of the PEM Fuel Cell. As a result, the PEM Fuel Cell could not work. Meanwhile, testing with UHP hydrogen produced the highest electrical power of 31.588 W at a flow rate of 450 mL/min with a load of 20 W. It indicates that the PEM Fuel Cell is optimal at the output power value with an efficiency of 69.80%.
Study on Solar Powered Electric Vehicle with Thermal Management Systems on the Electrical Device Performance Herlambang, Yusuf Dewantoro; Sulistiyo, Wahyu; Margana, Margana; Apriandi, Nanang; Nursaputro, Septiantar Tebe; Marliyati, Marliyati; Setiyo, Muji; Purwanto, Wawan; Rochman, Muhammad Latifur; Shyu, Jin Cherng
Automotive Experiences Vol 7 No 1 (2024)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.10506

Abstract

This study aims to determine the reliability of applying a thermal management system in conjunction with Internet of Things in solar electric cars. In conventional electric cars or those whose driving energy source comes from gasoline fuel; the applied thermal management system is mainly used as a coolant for the internal combustion engine. However, for electric cars the thermal management system may be used for the main components such as controllers that convert solar module energy into electricity and batteries. Results from tests utilizing six DC fans for air cooling of the thermal management system yield two variations of battery charging conditions from the solar modules, namely variations of 25 and 400 turns of the trimmer constant current step-up charger. Test results from the proposed thermal management system show that the highest step-up charger temperature is 35.75 °C with voltage of 57.64 V for the variation of 25 laps. The test results on the battery voltage and temperature show that the highest battery temperature reaches 31.75 °C with voltage of 57.3 V at the variation of 25 rounds.
PENERAPAN TEKNOLOGI JURNALISME DIGITAL DAN PROMOSI DESA WISATA BRANJANG KEC. UNGARAN BARAT, KAB SEMARANG Nikmatuniayah, Nikmatuniayah; Marliyati, Marliyati; Handayani, Jati; Anugrahwati, Lilis Mardiana
Jurnal Hilirisasi Technology kepada Masyarakat (SITECHMAS) Vol. 5 No. 1 (2024): Vol. 5 No. 1 April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/sitechmas.v5i1.5149

Abstract

Konsep pariwisata berkelanjutan mulai banyak digunakan guna mendukung perkembangan perekonomian di daerah yang memiliki potensi wisata, salah satunya dengan cara menawarkan pemandangan yang indah ,yang kelak mendatangkan manfaat ekonomi bagi warga desa Branjang Kec Ungaran Barat Kab Semarang. Desa Branjang berada diperbatasan Ungaran dan Kendal, memiliki banyak potensi wisata alam, seperti curuk, tebing, sawah, dan edukasi gula aren. Permasalahan yang ditemukan adalah adanya potensi wisata yang belum dikembangkan dengan maksimal. Keterbatasan modal, belum dikembangkan sebagai lokasi wisata yang marketable. Keterbatasan pengetahuan pemuda pemudi Desa Branjang dalam mengeksploitasi dan promosi Desa Wisata Branjang Kec Ungaran Barat, Kab Semarang. Metode pelaksanaan pengabdian masyarakat adalah: persiapan pengenalan program, pelaksanaa pelatihan, dan evaluasi. Berikutnya pelatihan teknik edit video treaser bagi pemula, pelatihan jurnalistik digital   bagi pemuda pemudi   untuk pembuatan konten video promosi sederhana dengan menggunakan gadget. Beserta praktek dan pendampingan   upload video promosi desa wisata    via youtube dan sosial media. Hasil kegiatan menunjukkan, bahwa :     Pemuda pemudi desa   mampu membuat dan mengedit video promosi desa wisata.  Pemuda pemudi   mampu menguasai jurnalistik digital   untuk pembuatan konten video promosi desa wisata. Desa Wisata Desa Branjang Kec Ungaran Barat, Kab Semarang menjadi  dikenal masyarakat luas dan dikunjungi secara luas. Pemasukan nilai ekonomi semakin meningkat dan meningkatkan pendapatan desa.
ANALYSIS OF THE IMPLEMENTATION OF MICRO, SMALL, AND MEDIUM ENTITY FINANCIAL ACCOUNTING STANDARDS AND ITS IMPACTS ON THE FINANCIAL REPORT QUALITY OF SMALL AND MEDIUM-SIZED ENTERPRISES Nikmatuniayah, Nikmatuniayah; Marliyati, Marliyati; Handayani, Jati; Anugrahwati, Lilis Mardiana
KEUNIS Vol 11, No 2 (2023): JULY 2023
Publisher : Finance and Banking Program, Accounting Department, Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/keunis.v11i2.4504

Abstract

This study aims to identify the perception of entrepreneurs regarding the Importance of bookkeeping and financial report related to Amountount of credit received by MSMEs, as well as the prospects for implementing the Financial Standards for Micro, Small, and Medium Entities (SAK EMKM), and their impacts on the quality of MSMEs financial reporting. This study used primary data collection by using questionnaires. Questionnaires were distributed using the purposive sample method, with MSMEs spread across the Banyumanik and Tembalang sub-districts as samples. Were 40 questionnaires sent directly to the selected MSMEs as Amountount of evidence adequacy? An in-depth review was conducted on the MSMEs chosen to complete the data and discussion. The provisions of MSMEs are business actors who have been running for more than two years and have applied for bank credit financing. Respondent data can be processed in 32 respondents. The analytical technique used is the Hypothesis Testing Model by Rizki (2012). The analysis technique used is multiple regression analysis. The hypothesis test results showed that nine hypotheses were accepted, and five were rejected. It was found that educational background contradicted the Importance of bookkeeping and recording SAK EMKM financial statements.
PENERAPAN E-GOVERNMENT PADA LAYANAN PAJAK KENDARAAN BERMOTOR DI PROVINSI JAWA TENGAH Marliyati, Marliyati; Murtini, Sri; Yudhaningsih, Resi; Hasanudin, Mohammad; Gayatrie, Christina Retno
KEUNIS Vol 10, No 2 (2022): JULY 2022
Publisher : Finance and Banking Program, Accounting Department, Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (276.258 KB) | DOI: 10.32497/keunis.v10i2.3626

Abstract

Industrial revolution 4.0 which is famous for the phenomenon of disruption of innovation, in the field of government, demands the implementation of information technology systems in the affairs of organizing government services. Electronic applications in the field of government, commonly referred to as e-Government, to optimize the service of certain tasks and functions. Government Resources Management System (GMRS) of Central Java Province, is an integrated system of government of Central Java Province. One of the implementations of the e-Government application available, is the vehicle tax application service, which is named SAKPOLE. The results of the study concluded that the SAKPOLE application for the administration of motor vehicle tax payments had not been fully utilized by motor vehicle taxpayers in Central Java Province. The SAKPOLE application has no effect on motor vehicle tax revenues in Central Java Province.
Model Sifat Kepribadian Memoderasi Hubungan Stres Kerja dan Perilaku Disfungsional Audit Nikmatuniayah, Nikmatuniayah; Marliyati, Marliyati; Handayani, Jati; Mardiana, Lilis
Jurnal Ilmiah Akuntansi Universitas Pamulang Vol. 12 No. 1 (2024): Jurnal Ilmiah Akuntansi Universitas Pamulang
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jiaup.v12i1.35814

Abstract

 This study aims to identify personality models that moderate the relationship between work stress and audit dysfunctional behaviour, in an effort to improve audit quality. Specifically, this study aims to investigate the effects of stress and audit dysfunctional behavior, focusing on the role of personality traits namely the big five personality and locus of control. The population of this research is all auditors who work at the Public Accounting Firm in the City of Semarang. The sampling technique uses purposive sampling, namely the sampling technique uses certain criteria. The criteria for the study sample were junior and senior auditor staff who had worked in KAP for at least 1 year, and 57 respondents were obtained. The analysis technique used is moderated regression analysis. Based on the results of data processing it was found that: There was no influence of work stress on dysfunctional behavior; There is no influence of personality traits on the relationship of work stress and audit dysfunctional behaviour. The personality trait in question includes five factors: openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism. The findings also showed that there was no effect of locus of control on the relationship between work stress and audit dysfunctional behaviour. Locus of control is seen from external and internal aspects.
Trends, Advances, and Future Directions in Fuel Cell Electric Vehicle Performance: A Bibliometric Analysis Using the PAGER Framework Herlambang, Yusuf Dewantoro; Apriandi, Nanang; Negara, Komang Metty Trisna; Raharjanti, Rani; Angraini, Lily Maysari; Alfauzi, Abdul Syukur; Marliyati, Marliyati
Automotive Experiences Vol 8 No 1 (2025)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.13111

Abstract

The global shift toward sustainable transportation has positioned fuel cell electric vehicles (FCEVs) as a key zero-emission mobility solution. Despite notable technological progress, FCEV adoption faces persistent barriers including high hydrogen production costs, limited infrastructure, and lack of real-world validation. This study employs the Pattern, Advance, Gap, Evidence for Practice, and Research Recommendation (PAGER) framework to conduct a comprehensive bibliometric analysis of 200 peer-reviewed publications from 2005 to 2024, focusing on performance trends, technological advancements, research gaps, practical applications, and future research directions. The analysis uses Scopus data and VOSviewer for visualization and thematic mapping to identify three distinct research phases: early exploration, gradual refinement, and rapid technological maturity. Key findings highlight advancements in energy management strategies, hybrid powertrain integration, and hydrogen storage optimization. However, critical gaps remain in economic modeling, behavioral adoption analysis, and infrastructure scalability. This study offers a structured roadmap for future research and practice, emphasizing the need for dynamic total cost of ownership models, interdisciplinary policy interventions, and real-world pilot projects. The findings serve as a strategic reference for academics, industry stakeholders, and policymakers to accelerate the global transition to sustainable FCEV-based transportation systems.
Solar radiation monitoring system for electric vehicle charging using solar modules based on the Internet of Things Herlambang, Yusuf Dewantoro; Huda, Muhamad Nurul; Antoro, Daffa Yudha Akbar Putra; Ghozali, Hanif Faizal; Setyawan, Martando Robby; Apriandi, Nanang Apriandi; An-Nizhami, Avicenna; Yanuar, Padang; Riadini, Elfrida Rizky; Marliyati, Marliyati
Journal of Mechanical Engineering and Fabrication Vol. 2 No. 1 (2025): Maret
Publisher : Journal of Mechafa Engineering and Fabrication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64273/jmef.v2i1.17

Abstract

The utilization of solar energy to support electric vehicle charging still faces challenges related to efficiency and real-time solar radiation monitoring. Addressing this issue is critical given the importance of optimizing renewable energy to facilitate the transition toward sustainable transportation. This study offers a solution through the development of an Internet of Things (IoT)--based solar radiation monitoring system capable of measuring solar light intensity in real time. The system employs a BH1750 sensor integrated with an ESP32 microcontroller to process data, transmit it to the Firebase Realtime Database, and display it via an Android application. The methodology encompasses the design, implementation, and testing of the system on an electric vehicle placed in an open area for 10 hours of observation. Results indicate that the highest light intensity, recorded at 98,321 lux, corresponded to solar radiation of 776.74 W/m², while the lowest light intensity, 69 lux, resulted in radiation of 0.55 W/m². The implications of this research include enhanced efficiency in electric vehicle charging, the advancement of IoT-based solar energy systems, and the potential integration with energy storage technologies and predictive algorithms to improve energy sustainability.
Juvenile Justice Reform and the Principle of Best Interests of the Child: A Global Legal Perspective Mujiono, Mujiono; Marliyati, Marliyati; Santosa, Tomi Apra; Dewi, Mira Nila Kusuma; Ghoni, Abdul
RIGGS: Journal of Artificial Intelligence and Digital Business Vol. 4 No. 2 (2025): Mei - Juli
Publisher : Prodi Bisnis Digital Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/riggs.v4i2.1522

Abstract

The reform of juvenile justice systems has become a central concern in global legal discourse, particularly in aligning legal practices with the universally recognized principle of the best interests of the child. This study provides a comparative legal analysis of juvenile justice reforms across various jurisdictions, evaluating the extent to which domestic legal frameworks integrate and operationalize this principle in both legislation and judicial practice. Utilizing a normative-qualitative approach, the research examines international legal instruments—such as the United Nations Convention on the Rights of the Child (CRC)—and their influence on national juvenile justice policies in both developed and developing countries. The findings reveal significant disparities in implementation, with some systems emphasizing rehabilitation and diversion, while others retain punitive models that compromise children's rights. The study concludes that effective juvenile justice reform requires not only legal alignment with international standards but also the establishment of child-sensitive institutions, specialized training for legal professionals, and a holistic approach that considers the child’s social context. This research underscores the imperative of embedding the best interests of the child as a guiding norm in both procedural and substantive aspects of juvenile justice worldwide.
Co-Authors Abdul Ghoni Alfauzi, Abdul Syukur Aminuyati An Nizhami, Avicenna Antoro, Daffa Yudha Akbar Putra Anugrahwati, Lilis Mardiana Apriandi, Nanang Apriandi Azka, Nela Diny Elfrida Rizky Riadini Gayatrie, Christina Retno Ghozali, Hanif Faizal Hasanudin, Mohammad Huda, Muhamad Nurul jati handayani, jati MARDIANA, LILIS Mira Nila Kusuma Dewi Muhammad Latifur Rochman Muji Setiyo Mujiono Mujiono Nanang Apriandi Negara, Komang Metty Trisna Nikmatuniayah Nikmatuniayah, Nikmatuniayah Nursaputro, Septiantar Tebe Padang Yanuar Priatin, Laela Retna Uma Purwanto, Wawan Rahayu, Fitri Anitya Puji Rani Raharjanti Santosa, Tomi Apra Setyawan, Martando Robby Shyu, Jin Cherng sri murtini . Wahyu Sulistiyo Yudhaningsih, Resi Yusuf Dewantoro Herlambang