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Ishak Semuel Erari
Universitas Papua, Manokwari, Indonesia
Agriculture, Biological Sciences & Forestry Chemistry Environmental Science Mathematics Physics

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Journal : Jurnal Natural

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KAJIAN TENTANG VARIASI KONSENTRASI NaCl DENGAN KETERSEDIAAN ENERGI LISTRIK PADA SEL VOLTA Cu-Zn Tria Winarsih; Ishak Semuel Erari; Abdul Muis Muslimin
Jurnal Natural Vol. 16 No. 2 (2020): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v16i2.111

Abstract

Kajian Tentang Variasi Konsentrasi NaCl Dengan Ketersediaan Energi Listrik Pada Sel Volta Cu-Zn bertujuan untuk menganalisa hubungan antara jumlah sel volta Cu-Zn terhadap besar arus listrik dan tegangan listrik, perubahan arus listrik, tegangan listrik dan daya listrik terhadap waktu, jumlah akumulasi energi pada sel volta Cu-Zn terhadap beberapa konsentrasi NaCl (0,001M; 0,01M; 0,1M; 1M; 10M). Hasil penelitian ini diketahui semakin tinggi konsentrasi NaCl maka tegangan yang dihasilkan semakin kecil sebaliknya jika konsentrasi NaCl tinggi maka arus listrik yang dihasilkan semakin meningkat. Pada penelitian ini konsentrasi NaCl yang paling baik adalah dengan konsentrasi 1 M dibandingkan dengan konsentrasi NaCl lainnya.
VARIASI KUAT MEDAN MAGNET DAN DAYA LISTRIK INPUT TERHADAP KARAKTERISTIK MOTOR LISTRIK DC DUA KUTUB Karim karim; Ishak Semuel Erari; Abdul Muis Muslimin
Jurnal Natural Vol. 17 No. 1 (2021): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v17i1.144

Abstract

Penelitian tentang variasi medan magnet dan daya listrik input terhadap karakteristik motor listrik DC bertujuan untuk mengetahui pengaruh kuat medan magnet dan pengaruh besar daya listrik input terhadap RPM, efisiensi, dan torsi motor listrik DC serta mengetahui pengaruh kuat medan magnet permanen terhadap daya listrik input. Penelitian ini merupakan penelitian eksperimen, yang dimulai dengan pembuatan alat, pengambilan data, kemudian pengolahan data. Dalam pengambilan data, data yang diukur adalah tegangan listrik input, tegangan listrik output, arus listrik input, arus listrik output dan RPM. Hasil dari pengolahan data diperoleh bahwa setiap penambahan jumlah magnet akan menyebabkan RPM meningkat, daya listrik menurun, torsi menurun, dan efisiensi yang paling tertinggi 80.564% pada jumlah satu magnet. Sedangkan setiap penambahan daya listrik input menyebabkan RPM meningkat, torsi meningkat, dan efisiensi tertinggi pada tegangan listrik power supply 12 Volt yaitu 83.366%.
PENINGKATAN LUAS PERMUKAAN KONVERTER RADIASI MATAHARI UNTUK MENINGKATKAN TEMPERATUR DAN DAYA LISTRIK YANG DIHASILKAN OLEH SISTEM GENERATOR TERMOLISTRIK Selestina Yulita Merit Bame; Ishak Semuel Erari; Abdul Muis Muslimin; Sangaji Hasmi Maharani Ipa
Jurnal Natural Vol. 18 No. 2 (2022): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v18i2.193

Abstract

The development of the use of solar energy as a new renewable energy is being encouraged in various forms of its use, and one of them is the conversion of solar energy into electrical energy. The Thermoelectric Generator (TEG) module is a power generation system that utilizes temperature differences to produce electric power. The temperature difference can be obtained from solar radiation the metal will convert into heat energy, which will pass through the TEG and be discharged into the environment. The amount of solar radiation converted into heat depends on the area of ​​the converter. This research aim is to increase the surface area of ​​the solar converter to increase the temperature used in the TEG system to generate electric power. The areas used for capturing solar radiation are 0.06 m2, 0.12 m2 and 0.16 m2 which are made of black aluminum plates in a closed system. At the bottom of the aluminum are installed 7 thermoelectric modules connected to a water reservoir as a coolant. The results of the study showed that the highest temperatures that could be achieved were respectively 39.1, 52.5 and 61oC, and the temperature differences that could be achieved were respectively 9.1; 20.0 and 28 oC. A temperature difference of 7.1 oC produces an electric power of 64.2 mW, and a temperature difference of 28 oC produces an electric power of 282.8 mW.
TINGKAT RISIKO GEMPA BUMI DI KABUPATEN NABIRE BERDASARKAN PERHITUNGAN NILAI PERCEPATAN TANAH MAKSIMUM MENGGUNAKAN METODE DONOVAN Ika Widi Astuti; Ipa, Sangaji Hasmi Maharani; Indra Birawaputra; Erari, Ishak Semuel
Jurnal Natural Vol. 19 No. 2 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i2.239

Abstract

Kota Nabire merupakan salah satu kota di Papua yang mempunyai tingkat resiko tinggi terhadap bencana alam gempa bumi. Pada tahun 2004, Kota Nabire diguncang gempa dengan kekuatan 7,2 SR yang menyebabkan kerusakan pada bangunan. Tingkat resiko gempa suatu daerah dinyatakan dengan intensitas MMI (Modified Mercalli Intensity) yang diklasifikasikan berdasarkan nilai Percepatan Tanah Maksimum (Peak Ground Acceleration, PGA). Di dalam menentukan PGA digunakan Metode Empiris Donovan dengan menggunakan dua parameter yaitu magnitudo dan jarak hiposentrum. Hasil perhitungan PGA dan Klasifikasi MMI di Kota Nabire dinyatakan dalam citra dua dimensi. Hasil penelitian ini menunjukan bahwa nilai PGA tertinggi yang diperoleh dengan menggunakan Metode Empiris Donovan adalah 339 gal dan digolongkan ke dalam kategori resiko sangat besar 1 dengan intensitas MMI IX-X. Nilai risiko gempa bumi dengan menggunakan nilai percepatan tanah maksimum Metode Empiris Donovan lebih kecil daripada nilai risiko gempa bumi Kementerian Pekerjaan Umum Republik Indonesia.
The Monitoring by satelitte image to are and surface runoff in surrounding of governor office of west papua province: Monitoring by satelitte image to are and surface runoff in surrounding of governor office of west papua province Erari, Ishak Semuel; Edi Kuncoro, Edi Kuncoro; Kardiputra, Kwasti K.; Muslimin, Abdul Muis
Jurnal Natural Vol. 20 No. 1 (2024): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v20i1.266

Abstract

The development of Governor's Office of West Papua Province has cause change forest land area become using other land on the surrounding area, so that it has cause increasing the runoff surface wide and the coefficient of runoff . Objective of this study was for know development of the runoff surface wide and the average runoff coefficient with using satelitte image since 2010 to 2023. Results observation of satellite image that the runoff surface wide increase to 99.55 ha (56.25%) and average runoff coefficient increases from 0.32 to 0.56.
Pemanfaatan air hujan sebagai sumber air utama kampus Universitas Papua Manokwari Ruamba, Mariones; Erari, Ishak Semuel; Mirino, Rosalina; Muslimin, Abdul Muis
Jurnal Natural Vol. 20 No. 2 (2024): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v12i2.284

Abstract

The purpose of this study was to determine the amount of water storage obtained from rainwater collected through the roof of the building and the monthly water needs at the University of Papua (Unipa) Manokwari Campus. The results showed that the input of rainwater per year was 3.54 times more than the water usage on campus. All buildings on the Unipa Manokwari campus had a water surplus per month, except for the Faculty of Economics and Business building which had a water deficit from October to December. Buildings with a water surplus can act as buffers for buildings with a water deficit.
The Comparison of several earthquake decay models to predict the duration of aftershocks that occured in Manokwari Regency on April 21, 2012: Aftershock in Manokwari Regency on April 21, 2012 Auwliyah, Auwliyah; Ipa, Sangaji Hasmi Maharani; Pamuji, Kristian Enggar; Erari, Ishak Semuel; Muslimin, Abdul Muis
Jurnal Natural Vol. 21 No. 1 (2025): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v21i1.296

Abstract

Has happen earthquake earth tectonics with magnitude 6.8 SR in Regency South Manokwari , West Papua Province on April 21, 2012. Purpose from study This is compare four decay models earthquake continuation namely the Omori , Mogi I, Mogi II and models Utsu to the earthquake data obtained from BMKG. Model with the smallest Root Means Square Error was the best earthquake decay model. Results matching curve shown the Mogi I and Utsu more suitable with earthquake decay data. Model of Mogi I and Utsu had mempredicted aftershocks for 15 days. Keyword: earthquake decay, aftershocks, Omori, Mogi I, Mogi II, Utsu
Co-Authors Abdul Muis Muslimin Auwliyah, Auwliyah Bernadetha Yohana Gebze David Victor Mamengko Edi Kuncoro, Edi Kuncoro Elina Relawaty Situmorang Ika Widi Astuti Indra Birawaputra Ipa, Sangaji Hasmi Maharani Karamang, Syukur Kardiputra, Kwasti K. Karim karim Linda Ernawati Lindongi Mirino, Rosalina Muslimin, Abdul Muis Nur R. Hastuti Pamuji, Kristian Enggar Ruamba, Mariones Sangaji Hasmi Maharani Ipa Selestina Yulita Merit Bame Tria Winarsih