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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS) Scientific Journal of Reflection : Economic, Accounting, Management and Business Jurnal Infortech AKADEMIK: Jurnal Mahasiswa Humanis
Sudirja, Sudirja
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Religion Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Library & Information Science Social Sciences

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Active battery balancing system for electric vehicles based on cell charger Amin, Amin; Budiman, Alexander Christantho; Kaleg, Sunarto; Sudirja, Sudirja; Hapid, Abdul
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 12, No 3: September 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v12.i3.pp1729-1737

Abstract

Cell imbalance can cause negative effects such as early stopping of the battery charging and discharging process which can reduce its capacity. In the previous active balancing research, the energy used for the balancing process was taken from the cell or battery pack, resulting in drop of electric vehicle driving range. In this paper, a cell charger based battery balancing system is proposed with a reduction in the number of switches. The use of a cell charger aims to increase the usable energy of the battery pack, since the energy used for the balancing process is taken directly from the grid. The use of fewer switches aims to reduce the cost and space used on the battery management system (BMS) hardware. The charger used for the balancing process has a maximum current of 3 A and a maximum voltage of 3.65 V while the number of switches used is n+5 for n batteries. A 15S1P 200 Ah LiFePO4 battery pack consists of 15 cells used for testing purpose. The test results show that the time needed to equalize the 15 cell battery voltage reaches 6 hours from the difference between the highest and lowest battery cell voltages of 145.1 mV to 15.1 mV.
Implementasi Model Waterfall Pada Sistem Informasi Akuntansi Penjualan Jasa Service Mobil Sudirja, Sudirja; Faradillah, Faradillah; Awanis, Husna Absharina
Jurnal Infortech Vol 2, No 1 (2020): Juni 2020
Publisher : Universitas Bina Sarana Informatika

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.441 KB) | DOI: 10.31294/infortech.v2i1.8287

Abstract

Berkembangnya teknologi di sekitar kita telah membawa manfaat bagi kemajuan kehidupan manusia khususnya teknologi informasi yang memudahkan dalam mengakses data dan informasi bagi perusahaan sehingga memperlancar proses pekerjaan untuk meningkatkan pelayanan pelanggan. Dalam dunia otomotif, salah satu pelayanan yang penting bagi kendaraan adalah perawatan mobil yang sering disebut dengan bengkel mobil, salah satunya PT Bintang Sekata Mandiri Jakarta yang melayani jasa perbaikan cat mobil. Namun, seluruh proses bisnis di bengkel ini masih dilakukan secara manual, atau belum terkomputerisasi, mulai dari proses pengajuan service sampai pembuatan laporan dan penyimpanan dokumen yang berhubungan dengan proses penjualan jasa service, sehingga memungkinkan terjadinya kesalahan dalam pencatatan serta kehilangan ataupun kerusakan dokumen. Perancangan sistem informasi ini merupakan salah satu solusi untuk menyelesaikan masalah yang ada di bengkel ini. Metodologi yang digunakan dalam perancangan sistem informasi penjualan ini adalah metode pengembangan perangkat lunak model air terjun (waterfall) yang menggunakan sistem database. Diharapkan dengan adanya sistem informasi penjualan ini dapat membantu dalam penyimpanan data sehingga dalam proses pencarian, pencatatan, pengolahan menjadi lebih mudah, efektif dan efisien
ANALISIS FORECAST DAN VALUATION MANAJEMEN FIXED ASSET PADA PERUSAHAAN IDX30 BURSA EFEK INDONESIA Martias, Andi; Rachmawati, Susan; Sudirja, Sudirja; Wahyuhening F, Firstianty
SCIENTIFIC JOURNAL OF REFLECTION : Economic, Accounting, Management and Business Vol. 7 No. 4 (2024): SCIENTIFIC JOURNAL OF REFLECTION: Economic, Accounting, Management, & Business
Publisher : Sekolah Menengah Kejuruan (SMK) Pustek

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37481/sjr.v7i4.956

Abstract

Every company has fixed assets that are used in its business operations. This article aims to investigate the problem, which stems from fixed assets that affect the profitability and efficiency of asset management. This study seeks to identify the impact of forecasting and valuation in fixed asset accounting through several objectives. Fixed asset management is the process of recording and tracking long-term assets throughout their entire life cycle, from acquisition to disposal. Companies must keep accurate records to ensure compliance with accounting standards and reporting requirements. The results of the analysis are known Overall, the fixed asset management of manufacturing companies shows satisfactory performance. Effective debt and equity balances, efficient utilization of investments, loans, and down payments, and impressive profitability demonstrate a well-managed approach.
Analisis Fraud Pentagon Mendeteksi Potensi Financial Statement Fraud Perusahaan IDX30 Bursa Efek Indonesia Rachmawati, Susan; Martias, Andi; Sudirja, Sudirja; Wahyuhening F, Firstianty
AKADEMIK: Jurnal Mahasiswa Humanis Vol. 5 No. 2 (2025): AKADEMIK: Jurnal Mahasiswa Humanis
Publisher : Perhimpunan Sarjana Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37481/jmh.v5i2.1403

Abstract

This research aims to determine the possibility of financial statement fraud by using Pentagon fraud analysis. Pentagon fraud is a concept that explains the factors that cause someone to commit fraud, namely pressure, opportunity, rationalization, ability, and management. In this research, stress factors are proxied through the use of financial goals and external stress. Opportunity factors are proxied by utilizing industry characteristics and effective monitoring. The rationalization factor is proxied using Changes in Auditors. The competency factor is represented by changes in management use. Finally, proxy the arrogance factor using the number of frequent Key Management images. This study uses the F-score model to see the possibility of false financial reports. The sample for this research is 30 IDX30 companies listed on the Indonesia Stock Exchange from 2020 to 2024 that meet certain criteria. The analysis technique used is panel data regression analysis and hypothesis testing using the t-test. The results of this research indicate that the variables financial objectives and management changes are proven to have a significant positive effect on the likelihood of detecting financial statement fraud, however the nature of external pressures and industry variables have a negative impact on the likelihood of detecting financial report fraud. Meanwhile, effective monitoring variables; Replacing auditors and management has no impact on the detection of financial reports that have the potential to be fraudulent.
Co-Authors Amin Amin Andi Martias Awanis, Husna Absharina Budiman, Alexander Christantho Faradillah, Faradillah Firstianty Wahyuhening Fibriany Jamhari Jamhari Sunarto Kaleg Susan Rachmawati