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Fervin Mayos Likumahwa
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jistech@unipa.ac.id
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JISTECH: Journal of Information Science and Technology
Published by Universitas Papua
ISSN : 20856245     EISSN : 29630533     DOI : -
Core Subject :
Journal of Information Science and Technology is a scientific journal published by the Faculty of Engineering, Universitas Papua. The journal is published three times a year in April, July, and October. It publishes original research articles and conceptual studies in the fields of Science and Technology, covering basic research, applied research, planning, design, and technological development. The Editorial Board welcomes manuscripts that provide original, clear, and significant contributions to the advancement of scientific knowledge and technological applications. The journal aims to serve as a platform for the dissemination and exchange of scientific information among academics, researchers, practitioners, and students at both national and international levels.
Arjuna Subject : -
Articles 127 Documents
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PENGARUH INVERSI FILTER Q TERHADAP AMPLITUDO SESAAT (INSTANSTANEOUS AMPLITUDE) DATA SEISMIK: THE EFFECT OF FILTER Q INVERSION ON AMPLITUDE INSTANT (INSTANEOUS AMPLITUDE) SEISMIC DATA Khristian Enggar Pamuji
JISTECH: Journal of Information Science and Technology Vol 7 No 1 (2015): Pebruari 2015
Publisher : Universitas Papua

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Abstract

Seismic waves travelling through media are attenuated by the conversion of elastic energy into heat. Uponbeing attenuated, the travelling wave changes: amplitude is reduced, travelling waveform is modified due tohigh-frequency content absorption, and phase is delayed. In this study, the effect of attenuation on seismic datawas reduced by applying inverse Q filter method. Application of inverse Q filter on seismic data, can improve thequality and resolution of data. Improving the seismic data quality and its resolution can be seen at seismicattributes (Instantaneous Amplitude) of seismic data. The results of study indicate that the seismic attributes(instantaneous amplitude) would be better if the inverse Q filter was applied.
PENGARUH WAKTU PENYINARAN DAN KONSENTRASI AWAL LARUTAN KROMIUM(VI) TERHADAP HASIL FOTOREDUKSI KROMIUM(VI) YANG TERKATALISIS OLEH SEMIKONDUKTOR ZNO-ZEOLIT: EFFECT OF EXPOSURE TIME AND INITIAL CONCENTRATION CHROMIUM(VI) SOLUTION ON PHOTOREDUCTION RESULTS SEMICONDUCTOR CATALYZED Chromium(VI). ZNO-ZEOLITE Buka di Google Terjemahan • Masukan Google Terjemahan Agnes Dyah Novitasari Lestari
JISTECH: Journal of Information Science and Technology Vol 7 No 1 (2015): Pebruari 2015
Publisher : Universitas Papua

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Abstract

The Yield of a photoreduction process of chromium(VI) or Cr (VI) catalyzed by ZnO semiconductorstructured in the zeolite/ZnO-zeolite (ZnO-Z) can be influenced by several factors, including the exposure timeand the initial concentration of the Cr (VI) solution. In this study, the photoreduction process of Cr (VI) iscarried out in a closed batch reactor equipped with a magnetic stirrer and a 38 Watt UV lamp. A total of 50 mLof a Cr(VI) solution and 25 mg of ZnO-Z was used to study the effect of exposure time and the initialconcentration of the Cr(VI)solution to the yield of its photoreduction process. The concentrations of Cr (VI) weredetermined by UV-Vis spectrophotometer using difenilkarbazid method. To determine the catalyst performanceof ZnO-Z in the photoreduction process, an examination of the catalyst in the form of bulk ZnO (ZnO bulkform)has been done. The results showed that the optimum exposure time in the photoreduction process of Cr (VI)catalyzed by ZnO-Z is 25 hours and the optimum initial concentration of Cr (VI) is 25 mg/L. Photoreductionyield of Cr (VI) by catalyst ZnO-Z is higher than the ZnO bulkform.
KAJIAN PEMANFAATAN MIKROTIK SEBAGAI USER MANEJER MENGGANTIKAN CHILISPOT DI UNIVERSITAS NEGERI PAPUA (STUDI KASUS : GEDUNG TEKNIK): STUDY OF THE UTILIZATION OF MICROTIK AS A USER MANEGER TO REPLACE CHILISPOT AT PAPUA STATE UNIVERSITY (CASE STUDY: TECHNICAL BUILDING) Alex De Kweldju
JISTECH: Journal of Information Science and Technology Vol 6 No 2 (2014): Vol. 6, No. 2, Agustus 2014
Publisher : Universitas Papua

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Abstract

Universitas Negeri Papua’s (UNIPA) Internet network use Chilispot and RADIUS Server as User Manager application to control user to use internet facility. In Chilispot –at client side- implementation, user was used to complain about login process after a power outage that usually happens in UNIPA. When the power outage happened, user status in database was still noted online cause user couldn’t login again after power back. User has to report to Computer Center or waited for online status restore. Router Mikrotik is multifunction device that has User Manager feature. User Manager in Mikrotik can handle userlogin without affected by power outage because it use different procedure from Chilispot. User can directly access internet again without login process after power outage. In this research, author replaced Chilispot at Engineering Building with Mikrotik User Manager to find out Mikrotik capability in solve Chilispot problem. After one mount implementation, internet users at Engineering Building didn’t report any problem related to internet access after power outage. Mikrotik User Manager allows user to login once every three days that simplify internet access process.
PILIHAN ENERGI MASA DEPAN UNTUK INDONESIA: FUTURE ENERGY OPTIONS FOR INDONESIA Agustinus Denny Unggul Raharjo
JISTECH: Journal of Information Science and Technology Vol 6 No 2 (2014): Vol. 6, No. 2, Agustus 2014
Publisher : Universitas Papua

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Abstract

As the largest nation in Southeast Asia Indonesia have major problems in energy consumption. Most of Indonesia energy consumption goes to supplied the high density populous area of Java Island, thus the infrastructures of energy storage and distribution is much more advanced in Java Island compare to other islands. Blessed by bountifull energy resources the nation primarily depended on fossil fuel energy for the last 30 years. In recent times, as import for fossil fuel energy increased, utilization of other source of energy are developed. Into the future the nation most likely would depend on energy from natural gas and renewable resources such as geothermal and hydroelectric to reduce the consumption of fossil fuel energy.
ANALISIS SPASIAL UNTUK PERENCANAAN JALAN TAMBANG DENGAN MENGGUNAKAN METODE ANALYTICAL HIERARCHY PROCESS: SPATIAL ANALYSIS FOR MINE ROAD PLANNING USING THE ANALYTICAL HIERARCHY PROCESS METHOD Eric Arung Patandianan
JISTECH: Journal of Information Science and Technology Vol 6 No 2 (2014): Vol. 6, No. 2, Agustus 2014
Publisher : Universitas Papua

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Abstract

Feasibility exploration of geological resources is not only seen by the quality and reserves, but also one of the important factor is access to transportation. This paper aims to plan a safe and low cost mine road using by AHP method and image analysis. The results of the analysis of mine road planning at the mine site to the port in total within ± 71.950 meters with land clearing for new road along the ± 22.061 meters with a single across the river, clearing bushes along the ± 20.733 meters and clearing forest along the ± 1.328 meters as well as on some point of mine road planning maximum slope of the cutting by 10% and 30%, so that the necessary evaluation in these areas.
PENURUNAN RUMUS BLACK-SCHOLES UNTUK PENENTUAN HARGA OPSI PUT EROPA: DECREASING THE BLACK-SCHOLES FORMULA FOR EUROPEAN PUT OPTION PRICING Andi Fajeriani Wyrasti
JISTECH: Journal of Information Science and Technology Vol 6 No 2 (2014): Vol. 6, No. 2, Agustus 2014
Publisher : Universitas Papua

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Abstract

GEOLOGI DAN POTENSI BAHAN GALIAN DAERAH WASEGI, DISTRIK PRAFI KABUPATEN MANOKWARI, PROVINSI PAPUA BARAT: GEOLOGY AND POTENTIAL OF MINERAL MATERIALS IN WASEGI AREA, PRAFI DISTRICT, MANOKWARI REGENCY, WEST PAPUA PROVINCE Hermina Haluk
JISTECH: Journal of Information Science and Technology Vol 6 No 2 (2014): Vol. 6, No. 2, Agustus 2014
Publisher : Universitas Papua

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Abstract

Administratively the research area is in Wasegi and surrounding area which located in Prafi District, Manokwari Regency, West Papua Province, Indonesia. The research goal is to understand the geology of Wasegi as well as the minerals resources potential. The methods that used are geological mapping and petrography of the rock samples. The area consists of three geomorphology units; fluvial-land unit, ripples denudation mount unit, and parallels denudation mount unit, in the juvenile to mature stadia. The stratigraphy of the research area is start from the oldest to the youngest; Kemum Schist, Maruni Crystalline Limestone, Lembai Diorite Intrusion Unit, and Pebbles - Clay Sediment. The geological structure that developed in the research area is shear joint structures on Northwest to East Southeast direction at Kemum Schist and Lembai Diorite Intrusion Unit. The possible resources of the research area that could be developed are sedimentation materials such as diorite, pebbles, and sand for building materials as well as the river sedimentation that the locals used in search for gold.
PENGARUH PERMEABILITAS RESERVOIR TERHADAP PEMBENTUKAN LAPANGAN PANASBUMI: THE EFFECT OF RESERVOIR PERMEABILITY ON ESTABLISHMENT OF GEOTHERMAL FIELDS Hermina Haluk
JISTECH: Journal of Information Science and Technology Vol 6 No 2 (2014): Vol. 6, No. 2, Agustus 2014
Publisher : Universitas Papua

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Abstract

Generaly geothermal is a manifestation of earth heat which accumulated since earth formed. In nature the heat generate what is called geothermal system. One of main aspect of a geothermal system is geothermal reservoir. The reservoir functions as water container that will be heated by heat sources or occupied by vapor that already generated deep down the earth. One of the physical property of geothermal reservoir rock is permeability. The permeability is the rock property to allow fluids to flow through the interconnected pores within the rock which will control the productivity of the reservoir. A good permeability allows quantities of water get into the reservoir that will increased the vapor/hot water discharge.
Penentuan Kandungan Kation dan Anion Mayor dalam Abu Serabut Kelapa Berpotensi Katalis Renewable: Determination of Major Cation and Anion Content in Coconut Fiber Ash Potentially Renewable Catalyst Darma Santi; Ahmad Muin; Agnes Dyah Novitasari Lestari
JISTECH: Journal of Information Science and Technology Vol 6 No 2 (2014): Vol. 6, No. 2, Agustus 2014
Publisher : Universitas Papua

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Abstract

Coconut fibers ash contain the cations and anions that can be use as renewable catalyst in certain chemical reaction. Coconut fibers ash that used in this experiments was from Manokwari, Papua Barat. Coconut fibers ash samples was destructed by aqua regia and was analyzed by Atomic Absorption Spectrophotometer (AAS) for determine cations and anions. The another part of sample was decarbonated and extracted with in methanol, then carbonats and bicarbonats were determined using acidimetry method. The AAS analyze results that coconut fibers ash samples in this experiments were contains K (20.140 g/kg); Ca (13.897 g/kg); Mg (4.611 g/kg); Fe (34.502 g/kg); dan Mn (8.957g/kg) cations. The major anions is carbonat (145.54 g/kg) and bicarbonate (50.051g/kg). The kalium content that was high in carbonats makes the aqeous of coconut fibers ash have base properties, it be potentially as renewable catalyst in the certain chemical reaction.
SURVEY POTENSI SUNGAI WARIORI ( SP 9 ) DISTRIK MASNI SEBAGAI PEMBANGKIT TENAGA LISTRIK SKALA KECIL ( PLTMh ) DIKABUPATEN MANOKWARI PROPINSI PAPUA BARAT: POTENTIAL SURVEY OF THE WARIORI RIVER ( SP 9 ) MASNI DISTRICT AS A SMALL SCALE ELECTRICITY POWER PLANT (PLTMh) IN MANOKWARI REGENCY, WEST PAPUA PROVINCE Bibiana Rosalina Wihyawari
JISTECH: Journal of Information Science and Technology Vol 6 No 2 (2014): Vol. 6, No. 2, Agustus 2014
Publisher : Universitas Papua

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Abstract

This study is dealing with Warioryriver masni Development calculation of the water flow and power potential of water as a Power Plant Micro Hydropower ( MHPP ).Potention survey wariory river calculating water flow, power potential an four sample.Calulating water flow and power potention as reached wariory river as 152 kW . Calculating water survey river wariory water flow and power potention. Output calculating river warioryis very power potential fora Power Plant Micro Hydropower ( MHPP ).

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