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All Journal TRANSIENT: Jurnal Ilmiah Teknik Elektro JOURNAL OF CHEMISTRY AND EDUCATION (JCAE) G-Tech : Jurnal Teknologi Terapan Jurnal Pusat Inovasi Masyarakat Media Hukum Indonesia (MHI)
Fajar, Muhammad Rizky
Unknown Affiliation
Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Law, Crime, Criminology & Criminal Justice Social Sciences

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IMPLEMENTASI IC TCA 785 DENGAN TRANSFORMATOR PENGGESER FASE PADA PENYEARAH TIGA FASE JEMBATAN TERKONTROL PENUH Fajar, Muhammad Rizky; Andromeda, Trias; Facta, Mochammad
Transient: Jurnal Ilmiah Teknik Elektro TRANSIENT, VOL. 6, NO. 1, MARET 2017
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1228.471 KB) | DOI: 10.14710/transient.6.1.(89-96

Abstract

Dewasa ini sumber arus searah banyak digunakan pada industri untuk catu daya motor arus searah. Namun, sumber tegangan yang tersedia pada industri pada umumnya adalah sumber tegangan tiga fase sehingga dibutuhkan suatu konverter untuk mengkonversi tegangan arus bolak – balik menjadi tegangan arus searah. Penyearah tiga fase terkontrol penuh merupakan konverter AC ke DC yang banyak digunakan karena tegangan keluaran yang dihasilkan dapat dikendalikan sesuai yang diinginkan. Tegangan fase ke fase memiliki perbedaan sudut fase mendahului 30o dari tegangan fase ke netral sehingga dibutuhkan suatu mekanisme khusus untuk sinkronisasi tegangan dalam pembentukan sinyal pengontrolan. Pada Tugas Akhir ini akan dirancang suatu penyearah 3 fase jembatan terkontrol penuh untuk menyearahkan arus bolak – balik 3 fase menjadi arus searah. Penyearah 3 fase terkontrol penuh akan dibuat dengan menggunakan IC TCA 785. Mekanisme untuk sinkronisasi tegangan akan direalisasikan dengan menggunakan transformator penggeser fase dengan hubung Yz1. Berdasarkan hasil pengujian, tegangan masukan arus bolak-balik sebesar 380 volt dapat disearahkan menjadi 540 volt arus searah. Tegangan keluaran dapat dikendalikan dengan mengatur nilai sudut picu yang diberikan pada sillicon controlled rectifier (SCR) dengan rentang sudut pemicuan sebesar  15o-120o.
PENGEMBANGAN TES DIAGNOSTIK FIVE-TIER UNTUK MENGIDENTIFIKASI MISKONSEPSI PESERTA DIDIK DALAM MATERI HIDROKARBON KELAS XI MIPA Fajar, Muhammad Rizky; Kusasi, Muhammad; Almubarak, Almubarak
JCAE (Journal of Chemistry And Education) Vol 6 No 3 (2023): JCAE EDISI APRIL 2023
Publisher : PROGRAM STUDI PENDIDIKAN KIMIA FKIP UNIVERSITAS LAMBUNG MANGKURAT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jcae.v6i3.1836

Abstract

Telah dilakukan penelitian pengembangan instrument tes diagnostik five-tier model 4D pada materi hidrokarbon. Penelitiaan ini bertujuan untuk mengetahui kevalidan, kepraktisan dan keefektifan dalam pengembangan menggunakan instrumen tes diagnostik five-tier untuk untuk mengetahui tingkat miskonsepsi pada peserta didik materi hidrokarbon. Subjek penelitian adalah peserta didik kelas XI MIPA 2 SMAN 1 Sungai Tabuk dengan jumlah siswa 23 orang. Pengambilan sampel menggunakan teknik random sampling. Hasil penelitian menunjukkan (1) Terdapat empat konsep hidrokarbon yang memiliki persentase diatas 50% mengalami miskonsepsi konsep-konsep hidrokarbon tersebut iyalah pengelompokan hidrokarbon, tata nama hidrokarbon, sifat fisik hidrokarbon dan isomer. Dari tingkat kevalidan diperohel hasil sangat valid yang dipeoleh dari para ahli dan jawaban siswa yang diukur menggunakan SPSS. Kepraktisan diperoleh dari peserta didik yang mengisi angket dengan memberi skor 4 hingga 5 yang menandakan intrumen sudah dapat diterima dan diperkuat dengan wawancara kebeberapa peserta didik. Keefektifan diperoleh hasil dimana instrument sudah dinyatakan efektif karna sudah dapat mengukur tingkat pemahaman peserta didik dan diperkuat dengan hasil dari tingkat kesukaran, daya pembeda, reabilitas, dan validitas. Oleh karena itu, instrument tes diagnostik five-tier ini layak digunakan untuk mengukur dalam materi hidrokarbon.
Pemberdayaan Masyarakat Loji, Kota Bogor dalam Pencegahan Stunting Melalui Program Perisai Keluarga dan Percepatan Kebun Stunting Salsabila, Kania; Sambogo, Rizki Bagus; Syahrani, Iga Dwi; Fajar, Muhammad Rizky; Aisya, Zalfa Rihadatul; Dewi, Maharani Arzela; Sarah, Wurianty; Annisa, Apriyanti Nur; Putra, Hilal Rosyid; Hasibuan, Lailan Sahrina
Jurnal Pusat Inovasi Masyarakat Vol. 6 No. Khusus: Desember 2024
Publisher : Direktorat Pengembangan Masyarakat Agromaritim, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpim.6.Khusus.95-108

Abstract

The nutritional problems that are still inherent in Indonesia, especially stunting among toddlers, have had a serious impact on the quality of human resources. Loji Subdistrict in Bogor City is facing problems related to increasing stunting rates, which has sparked action from IPB students through the KKN-TI program to help reduce stunting rates. This program is carried out in the form of education and planting of family medicinal plants, cultivating fish in buckets (budikdamber) based on aquaponics, as well as cooking demonstrations using ingredients from family medicinal plants, through a program called Perisai Keluarga and Acceleration of Stunting Gardens. The success indicator of the Perisai Keluarga with the Loji BERTOGA subprogram is the achievement of the Family Medical Plant (FMP) planting process with a minimum of three types of plants and conveying an understanding regarding the benefits of these plants, Perisai Keluarga with the Gandeng PMT-ji subprogram was said to be successful with a percentage of 80% of toddlers liking the churros and moringa leaf sauce menu as well as Trilaa tea, the high level of enthusiasm of the mothers when they took part in the cooking demonstration, and received the Supplementary Feeding Program (SFP) recipe menu book, while the Stunting Garden Acceleration was said to be successful by achieving the resumption of installation of catfish cultivation in buckets based on aquaponics. It is hoped that this activity can improve community nutrition, reduce stunting, and encourage awareness of the importance of balanced nutrition.
Penyelesaian Kasus Wanprestasi Wawa Rental dalam Sewa Menyewa Mobil Ramadani, Fathan; Alfahyan, Muhammad Raihan; Fajar, Muhammad Rizky; Haki, Ardiona Raajwa; Ramadhani, Dwi Aryanti
Media Hukum Indonesia (MHI) Vol 2, No 4 (2024): December
Publisher : Penerbit Yayasan Daarul Huda Kruengmane

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

Abstract

An agreement or other legal event that results in an obligation gives rise to this legal relationship. In the practice of treaty law, problems often arise relating to the debtor's failure to fulfill his obligations to the creditor or his failure to keep his promise. Default, which comes from the Dutch meaning “bad performance”, occurs when a debtor fails to fulfill a promise, whereas performance occurs when a debtor fulfills a contract under civil law. Default means not fulfilling obligations that have been agreed upon in an engagement. Research on default and its settlement in a car rental agreement at Wawa Rental, Sragen Regency, aims to identify various forms of default and how to resolve them in the practice of car rental agreements at Wawa Rental. The results show that there are several forms of default, namely not performing obligations at all, not being able to carry out obligations as promised, being late in carrying out obligations, and taking actions prohibited in the agreement. The settlement of defaults is carried out through deliberation, while court settlement has never been chosen. The default cases discussed in this paper are examples of many similar cases that have occurred in Indonesia. This shows that there are still many Indonesians who ignore the provisions in the agreement that has been agreed upon by both parties.
Flood Modeling Analysis of the Cokroyasan Watershed in Bayan District, Purworejo Regency Using HEC-RAS Software Fajar, Muhammad Rizky; Sari, Sely Novita; Hermawan, Anggi
G-Tech: Jurnal Teknologi Terapan Vol 9 No 3 (2025): G-Tech, Vol. 9 No. 3 July 2025
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v9i3.7393

Abstract

Floods are a frequent natural disaster in Indonesia. Heavy rainfall and poor watershed management make the Cokroyasan River Basin (DAS), Bayan District, Purworejo Regency, especially susceptible. The purpose of this study is to analyze the flood inundation area and calculate the peak discharge in the Cokroyasan Watershed using satellite rainfall data and the Digital Elevation Model (DEM). The study calculates the highest water flow during floods using the Nakayasu Synthetic Unit Hydrograph (HSS) method and examines the water flow with HEC-RAS and ArcGIS to create maps showing areas that could flood. The results showed that, using the Log Pearson Type III distribution, the design rainfall for a 25-year return period with a flow coefficient of 0.288 was 117.6711 mm. The maximum flood discharge, as determined by the Nakayasu HSS, was 1684.028 m³/second. Hydraulic analysis was able to map the region of floods based on land cover, covering 16,200 km² in total. 4,961 km² were covered the low flood depth category (0–1 m), 3,175 km² the medium inundation (1–3 m), and 8,061 km² the high inundation (>3 m). The results of the simulation might lead to a more effective approach for managing and reducing the danger of flooding.
Co-Authors Aisya, Zalfa Rihadatul Alfahyan, Muhammad Raihan Almubarak, Almubarak Anggi Hermawan Annisa, Apriyanti Nur Dewi, Maharani Arzela Haki, Ardiona Raajwa Hasibuan, Lailan Sahrina Mochammad Facta Muhammad Kusasi Putra, Hilal Rosyid Ramadani, Fathan Ramadhani, Dwi Aryanti Salsabila, Kania Sambogo, Rizki Bagus Sarah, Wurianty Sely Novita Sari Syahrani, Iga Dwi Trias Andromeda