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

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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.
Efisiensi energi, emisi karbondioksida, dan biaya bahan bakar beberapa jenis kompor masak di Kabupaten Manokwari Provinsi Papua Barat Bernadetha Yohana Gebze; Ishak Semuel Erari; Elina Relawaty Situmorang
Cassowary Vol 6 No 1 (2023): Januari
Publisher : Program Pascasarjana Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/casssowary.cs.v6.i1.147

Abstract

Most Public Regency Manokwari West Papua Province had used kerosene as fuel to cook whereas kerosene was known very no friendly environment because of kerosene produced very high emission of carbon monoxide (CO2). For limit use kerosene fuel, need searching for stove using fuel that has high efficiency however CO2 emissions level and cost were low. Purpose from study this was identify a number of fficient stove in using fuel, CO2 emissions and cost of fuel were more low. Tested stoves were electrically induction stove with a number of power (300W, 700W, 1000W, 1200W, 1400W, 1600W, 1800W, 2000W), stove electricity element consisted of two powers (1100W and 500W), kerosene stove 22 wicks and 16 wicks and LPG stove . Method used in this study was semi-empirical method , where in this research use pure water as much as 500 ml, which is heated from 27 o C to 100 o C, with use stainless steel receptacle with cover from glass. Results of study showed that electrically induction stove with 2000W power given the fastest cooking time (2.15 minutes) however with 1400W power cooking time electrically induction stove more fast than the other stove. Highest efficiency obtained from electrically induction stove (84%-88%), elemen electric stoves 50%-53%, LPG stove 46.38%, and kerosene stove 10–12%. Emission of CO2, the most low obtained from electrically induction stove (182–190 g CO2), kerosene stove 130-153 g. Lowest cost for cooking 500 ml obtained from electrically induction stove with IDR. 94–106, elemen stove IDR. 150–180, LPG stove IDR 210, and kerosene stove IDR. 225–261. Electrically induction stove is the best stove, which had highest energy efficiency, CO2 emission level and cost were low.
Kajian kerentanan dan kapasitas terhadap ancaman Bencana Tsunami di Kampung Wamesa, Distrik Manokwari Selatan, Kabupaten Manokwari, Provinsi Papua Barat Nur R. Hastuti; Ishak Semuel Erari; David Victor Mamengko; Linda Ernawati Lindongi; Syukur Karamang
Cassowary Vol 6 No 2 (2023): Juni
Publisher : Program Pascasarjana Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/casssowary.cs.v6.i2.144

Abstract

This study determined the management of disaster risk reduction in Wamesa Village, South Manokwari District, West Papua Province, and evaluated the level of vulnerability, capacity, and risk of the tsunami catastrophe threat. This research is a quantitative and qualitative research that uses analytical descriptive methods that describe the context of vulnerability and capacity in the research location. The primary data were collected through interviews with community development cadres of Wamesa village as well as documentation (mapping) of social, economic, physical and environmental data at the research location referring to the technical research guidelines for tsunami disaster risk study. Secondary data to see potential threats as well as vulnerability and capacity level assessments were obtained from the relevant agencies. The results found that the level of vulnerability and capacity of the Wamesa village community to the tsunami disaster was categorized as high with a vulnerability and capacity index values were 2.21 and 2.54, respectively. Wamesa village, in general, is at intermediate risk of a tsunami disaster, with a total of 0.92 ha of the hamlet's land area being at low risk, 46.13 ha being at moderate risk, and 2.91 ha being at high risk. The management of disaster risk reduction in Wamesa village needs to be strengthened by integrating risk assessment and disaster mitigation activities into village planning and budgeting so it can be sustainable and contributes to reducing vulnerability and increasing the capacity of the Wamesa village against the threat of a tsunami disaster.
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