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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Manajemen Bisnis Journal of Economics and Management
Erma Wijayanti, Erma
Alumni Prodi TeknikMesinUniversitas PGRI Banyuwangi
Automotive Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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STUDI PERBANDINGAN REGULATOR KONVENSIONALDUA RELAY DAN REGULATOR ELEKTRONIKBERBASIS MIKROKONTROLERAVR ATMEGA8 Wijayanti, Erma; Rubiono, Gatut; Mujianto, Haris
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

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Abstract

Automotive charging system provide vehicle’s electricity consumption and battery charging. Common regulator has unstable voltage output. This research is aimed to compare the performance of common and electronic regulator. Electronic regulator designed with an AVR ATMega8 microcontroller and 16 x 2 matrix LCD. The devices are tested in the charging system of Toyota Kijang 5K automotive engine by measuring alternator voltage output using voltmeter. The engine is running at 1000, 1500, 2000, 2500 and 3000 rpm. The measurements are taken three times for 300 seconds with 30 second interval. The result shows that the average voltage output of electronic regulator increase faster at 0 until 30 second measurement period. The result also shows that electronic regulator has more stable voltage output which is 14,45 Volt. The overall comparison study shows that electronic regulator has better performance than common regulator.
STUDI PERBANDINGAN REGULATOR KONVENSIONALDUA RELAY DAN REGULATOR ELEKTRONIKBERBASIS MIKROKONTROLERAVR ATMEGA8 Wijayanti, Erma; Rubiono, Gatut; Mujianto, Haris
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Automotive charging system provide vehicle’s electricity consumption and battery charging. Common regulator has unstable voltage output. This research is aimed to compare the performance of common and electronic regulator. Electronic regulator designed with an AVR ATMega8 microcontroller and 16 x 2 matrix LCD. The devices are tested in the charging system of Toyota Kijang 5K automotive engine by measuring alternator voltage output using voltmeter. The engine is running at 1000, 1500, 2000, 2500 and 3000 rpm. The measurements are taken three times for 300 seconds with 30 second interval. The result shows that the average voltage output of electronic regulator increase faster at 0 until 30 second measurement period. The result also shows that electronic regulator has more stable voltage output which is 14,45 Volt. The overall comparison study shows that electronic regulator has better performance than common regulator.
STUDI PERBANDINGAN REGULATOR KONVENSIONALDUA RELAY DAN REGULATOR ELEKTRONIKBERBASIS MIKROKONTROLERAVR ATMEGA8 Wijayanti, Erma; Rubiono, Gatut; Mujianto, Haris
ROTOR Vol 8, No 1 (2015)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (306.763 KB)

Abstract

Automotive charging system provide vehicle’s electricity consumption and battery charging. Common regulator has unstable voltage output. This research is aimed to compare the performance of common and electronic regulator. Electronic regulator designed with an AVR ATMega8 microcontroller and 16 x 2 matrix LCD. The devices are tested in the charging system of Toyota Kijang 5K automotive engine by measuring alternator voltage output using voltmeter. The engine is running at 1000, 1500, 2000, 2500 and 3000 rpm. The measurements are taken three times for 300 seconds with 30 second interval. The result shows that the average voltage output of electronic regulator increase faster at 0 until 30 second measurement period. The result also shows that electronic regulator has more stable voltage output which is 14,45 Volt. The overall comparison study shows that electronic regulator has better performance than common regulator.
Green Entrepreneurial Orientation in MSMEs: A Systematic Review and Future Research Agenda Wijayanti, Erma; Abdulah, Budiman; Putu Yohanes Agata L Sandopart, Dewa
Manajemen Bisnis Vol. 15 No. 2 (2025): October
Publisher : Universitas muhammadiyah malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/mb.v15i2.41970

Abstract

This study presents a systematic review and bibliometric analysis of Green Entrepreneurship Orientation (GEO) in micro, small, and medium enterprises (MSMEs) for the period 2018–2025. The analysis employs a combined protocol with bibliometric techniques to identify research trends, author collaboration patterns, and thematic focuses. Findings indicate that key drivers of GEO in MSMEs include environmental awareness, innovation capacity, and stakeholder pressure, while under-explored areas include green technology adoption, policy support, and sustainable supply chain integration. This study proposes a future research agenda focused on digital transformation, circular economy practices, and SME resilience in a post-crisis context.
Deviations in the Initial Public Offering (IPO) Process as the Root of Stock Price Manipulation: A Case Study of Issuers in Indonesia for the 2020–2025 Period Sandopart, Dewa Putu Yohanes Agata L.; Adek, Lie; Sandopart, Dewa Ayu Indiana Ida Loemongga; Wijayanti, Erma
Journal of Economics and Management Vol. 4 No. 1 (2026): Journal of Economics and Management, March 2026
Publisher : Lembaga Publikasi Ilmiah Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/ecoma.v4i1.459

Abstract

This study analyzes deviations in the Initial Public Offering (IPO) process as the root of stock price manipulation among issuers in Indonesia for the 2020-2025 period. Using a qualitative approach with a multiple case study method, this research examines three issuers sanctioned by the Financial Services Authority (OJK): PT Berkah Beton Sadaya Tbk (BEBS), PT Repower Asia Indonesia Tbk (REAL), and PT Multi Makmur Lemindo Tbk (PIPA). Data were collected through in-depth interviews with 12 informants consisting of former OJK/Indonesia Stock Exchange (IDX) officials, capital market practitioners, academics, investigative journalists, and legal practitioners, as well as document analysis of prospectuses, financial statements, and OJK documents. The results identify four forms of IPO deviations: manipulation of material fact information, share allotment engineering, due diligence procedure violations, and discrepancies in the use of IPO funds. The BEBS case demonstrates how IPO deviations create structural conditions that facilitate pump-and-dump schemes through 57 nominee accounts, generating manipulative profits of IDR 14.5 trillion. This study identifies five factors causing weak detection and prevention: regulatory factors, law enforcement, corporate governance, market structure, and economic incentives. These findings confirm the OJK's statement that the root of stock price manipulation originates from deviations in the IPO process and emphasize the need for stronger supervision and enforcement.
Violations of the Prudential Principle and Fraudulent Practices in Indonesia’s Capital Market: A Case Analysis of OJK Sanctions Against Listed Firms Sandopart, Dewa Putu Yohanes Agata L.; Adek, Lie; Sandopart, Dewa Ayu Indiana Ida Loemongga; Wijayanti, Erma
Journal of Economics and Management Vol. 3 No. 3 (2025): Journal of Economics and Management, December 2025
Publisher : Lembaga Publikasi Ilmiah Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/ecoma.v3i3.461

Abstract

This research investigates how breaches of the prudential principle contribute to fraud within Indonesia’s capital market, focusing on listed entities penalized by the Financial Services Authority (OJK). Utilizing a qualitative multiple-case study approach, the analysis centers on four prominent cases: PT Repower Asia Indonesia Tbk (REAL), PT Multi Makmur Lemindo Tbk (PIPA), PT Bliss Properti Indonesia Tbk (POSA), and PT Mirae Asset Sekuritas Indonesia. Secondary data were gathered from OJK official statements, sanction rulings, national media reports, and legal documents spanning 2022–2025. Through pattern-matching and cross-case synthesis, three recurring violation patterns emerged: inadequate customer due diligence by underwriters, submission of inaccurate information during share subscription and allocation, and lapses in directors’ internal oversight. Fraudulent schemes primarily involved masking true beneficial ownership via nominee structures and offshore vehicles, alongside the fictitious recognition of assets financed by IPO proceeds. OJK’s enforcement strategy demonstrates a tiered, proportionate approach that extends to market intermediaries and, in select instances, crosses national borders. A notable systemic flaw identified is an enforcement delay of up to two years, which may weaken deterrence. The study validates the applicability of the fraud pentagon framework in emerging markets and offers actionable recommendations for enhancing risk-oriented supervision.
Co-Authors Abdulah, Budiman Adek, Lie Dewa Putu Yohanes Agata L. Sandopart Gatut Rubiono Haris Mujianto Putu Yohanes Agata L Sandopart, Dewa Sandopart, Dewa Ayu Indiana Ida Loemongga Yundari, Yundari