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JST ( Jurnal Sains Terapan )
Published by Politeknik Negeri Balikpapan
ISSN : 24068810     EISSN : 24775525     DOI : -
Core Subject : Education, Social,
Mathematics Social Sciences Other
JST (Jurnal Sains Terapan), dengan ISSN 2477-5525 (media online) dan 2406-8810 (media cetak) adalah media publikasi hasil penelitian dibidang Social Cience, Sains Terapan dan Matematika Terapan.
Arjuna Subject : -
Articles 9 Documents
 1 
Search results for , issue "Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)" : 9 Documents clear
Perencanaan Rute Evakuasi pada Kasus Kebocoran Pipa Gas Alam dengan Simulasi Berbasis Computational Fluid Dynamic Adhi Setiawan; Tri Bagus Setiawan; Agung Nugroho; Muhammad Luqman Ashari
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.496

Abstract

Melting of metals generally used the energy source of natural gas which is flowed through a pipeline at high pressure. Production activities in companies that use these gases have high potential hazards because they can cause fires or explosions if not managed properly. This study aims to analyzed natural gas dispersion in the event of gas pipeline leak, determine assembly point and evacuation route map plan for workers in the event of emergency condition. Natural gas dispersion was simulated using Computational Fluid Dynamic Ansys Fluent. Results of simulation showed distribution concentration of natural gas indoors at leakage almost uniform with concentration between 5%-13,17%. At that concentration the mixture of air and natural gas has the potential to explode because it is in the range of natural gas flammability. The maximum natural gas concentration of 13.17% at a height of 12 m above the leak hole. Generated two points Assembly point based on the calculation of blast radius with total area of 58,500 cm2 and can accommodate as many as 65 workers.Keywords :CFD Simulation, Natural Gas Dispersion, Assembly point, Evacuation Rute
Investigasi Proses Kristalisasi Logam Paduan Amorphous Mg58Cu31Gd11 Andi Idhil Ismail
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.464

Abstract

Bulk Metallic Glass (BMG) gains attractions as a candidate for future material in various applications due to its physical and mechanical properties. The fundamental characterization of the crystallization of Mg58Cu31Gd11 has been performed using in-situ synchrotron radiation technique complemented with differential scanning calorimeter (DSC). The glass transition temperature was detected and the occurrence of two step crystallization found during the process. The existence of Mg2Cu and other more complex compound is suggested. Keywords: bulk metallic glass (BMG), synchrotron radiation, crystallization,
Efektifitas Material Akustik Pengendali Kebisingan pada Ruang Genset di Pusat Perbelanjaan di Gorontalo Haisah Siti; Indah Sari Zulfiana
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.515

Abstract

Shopping centers construction have to do a good building management so it would have a comfort for visitors. One of comfort things that should get the attention is audial comfort. In Gorontalo City, Most of the electricity users choose to use electricity from Generator set supply, this results an increase in noise. The rotors of the electrical generators basically can be controlled by the use of box silent that has been specially designed so that it can prevent noise. In addition on the control of noise to the same type of chambers electrical generators may also be convened with arranging in layer interior of the same type of chambers with the material acoustic absorbed sound. The use of acoustic material sound-absorbent can work effectively with right material, in accordance with the degree of hardness sound taking place in the room. This research takes the generator chamber in one of shopping centers in Gorontalo. Generator chamber in this study has been tasted in two treatment tests of space generator. In first test, the wall of the coated material dampers from Styrofoam with thickness 2 cm, and obtained percent reduction noise of 8,32 % , While in the second test by using layers Styrofoam and rugs are able to reduce noise into 17,58 %. The final result of the research found is that the previous noise of 95db can be reduced to 78,3db.
Penyediaan Air Bersih Mandiri Permukiman Pesisir Kota Balikpapan berdasarkan Tingkatan Partisipasi Mega Ulimaz; Risa Andini
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.476

Abstract

Kelurahan Baru Tengah is a sub-district in Kecamatan Balikpapan Barat which is the coastal area. This sub- district is dominated by settlement activities. Based on the Spatial Plan of Balikpapan City Year 2012-2032, the target of providing the needs of clean water of Balikpapan Barat reach 100% in 2030. However, Kelurahan Baru Tengah is an area that until now the providing of clean water needs has not been evenly distributed. In addition, there has been no guidance of community participation in the provision of clean water in this area. This study aims to formulate the guidance of the water supply community-based participation by using Analytical Hierarchy Process. The result of the analysis that has been done is the communities in Kelurahan Baru Tengah can participate at the level of Delegated Power in the form of their idea. The results obtained from this research are expected to be a reference for the provision of clean water in Kelurahan Baru Tengah which involves local community participation.Keywords : clean water provision, community participation, coastal area, analytical hierarchy process.
Analisis Pengendalian Kualitas dengan Menggunakan First Pass Yield dan Fishbone Diagram Pada PT X Sri Susilawati Islam; Fatkhurozak Fatkhurozak
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.516

Abstract

Industrial competition in the current global industrial era is not only influenced by product prices but also influenced by customer satisfaction with the products, one of the factors that influence customer satisfaction is the quality of the products, for which quality control is needed. This studies aims to measure the level of quality control as seen from the percentage of defective products and customer satisfaction. This research was conducted at PT X  which is a cable producing company. The method used in this studies is the First Pass Yield to measure the percentage of defective products, Customer Complaints and production claims related to the quality of raw materials & haspels to measure customer satisfaction through questionnaires. From data processing, the average value of First Pass Yield is 94.2% which indicates the average rate of defective products per month is 5.8%. Customer complaints show customers are not satisfied with the Non Standard Length relating to the marker and cable length. So as to improve product competitiveness we provide several improvement proposals based on the fault categoriesthat arise.
Microwave Rectifier untuk Transmisi Listrik Tanpa Kabel dengan Metode Matching Impedance Wahyu Hendra Gunawan; Fitri Oktafiani; Deryanto Balalembang
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.478

Abstract

In this modern era, the high consumption of electrical energy requires considerable resources. Resources used in this modern era include non-renewable energy and environmentally unfriendly, so it takes a new method that is environmentally friendly to meet the needs of electric energy consumption. The energy harvesting technique comes as an environmentally friendly source of energy, harvesting energy techniques utilize the resources around us without causing waste and pollution. Rectifier with matching impedance as a wireless power transmission with signal rectifier capability is an environmentally friendly method of energy harvesting technique. Rectifiers can generate electrical energy sources by utilizing electromagnetic waves as resources captured by antennas. Rectifiers are designed with application simulation process, matching impedance calculation, design printing and measurement with special measuring instrument. Rectifiers are designed and realized in the form of full-wave rectifier types. This rectifier uses a schottky diode HSMS 2860, The measurement of rectifier that uses a signal generator as a measuring device generated output of 5.08 V at 2.4 Ghz level +20 dBm and return loss -37.70 dBm at 2.4 Ghz level +5 dB. Keywords: Microwave, Rectifier and Matching Impedance
Kuat Tekan Batako Ringan dengan Material Latrit dan Foam Agent Rahmat Rahmat; Martheana Kencanawati; Suheria Mulia Devi
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.523

Abstract

This research intends to improve laterite material as an alternative filler composite mortar bricks, began with analyzing substitution of mortar sand composite, to its concrete mortar composite according to characteristic and compressive strength,  as comparison for common bricks  building materials had done. This research was pointed, to maximize the bricks compressive strength with laterite addition by experiment method. Samples were made with two variations, which is normally and laterite bricks (as sand substitution is 50%) and the compressive strength gain normal mixture was at 25,09 kg/cm2. Meanwhile, by using 50% bricks substitution and 50% sand substitution, the results was 28,56 kg/cm2. It can be assumed that compressive strength material can increase the compressive strength.
Formulasi Briket Biorang Sekam Padi dan Biji Salak sebagai Sumber Energi Alternatif Finta Amalinda; Muhammad Jufri
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.484

Abstract

Alternative energy can be produced from appropriate technology by utilizing biomass waste. For instance, rice husk and zalacca seeds which were by-product and waste that the benefits of has not been widely studied. The aim of this research is to find out the head value, duration of tima, ash and water contents, volatile matter, and carbon content of the mixture form of bio arangrice husk and zalacca seeds. This research is an experimental research which test was carried out in the laboratory. This research was conducted from June to august 2018. The object of this research is biomass formulation of bio arang mixtures of rice husk and zalacca seeds by mass comparison 0,25:1, 0,5:0,75, 0,5:0,5, 0,75:0,5 and 1:0,25 with the total mass of 200 gram, formed on the mold with a diameter of 5 centimeters, and a height of 7 centimeters. Based on the research, the result found that the mixed formulation of rice husk and zalacca seeds with ratio of 0,25:1 has the longest time duration which 38 minutes and 15 seconds, the largest water content approximately 5,761% and the highest carbon content was 60,326%. Furthermore, the mixed formulation of rice husk and zalacca seeds with ratio 1:0,25 has the highest heating value as much as 260,309 KJ/gr, the highest ash content was 13,829%, and the highest volatile matter substances was about 33,671%.Keywords : Briquettes , Bioarang , Rice husk biomass, Zalacca seeds
Pola Sebaran Ruang Terbuka Hijau (RTH) Publik di Kota Balikpapan Berdasarkan Jenis dan Karakteristiknya Ajeng Nugrahaning Dewanti; Mega Ulimaz; Ariyaningsih Ariyaningsih
JST (Jurnal Sains Terapan) Vol 4, No 2 (2018): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v4i2.512

Abstract

Balikpapan City has a population that continues to increase in 2010 to 2015. Population growth has resulted in population densification and rapid and uncontrolled settlements in parts of the city. Thus, the need for space to accommodate population growth will increase so that it is very vulnerable to changes in the use of green open space into settlements and built area. The Changes in land use functions will have a negative impact on environmental conditions if did not controlled. Thus, it is necessary to control land use in terms of green open space availability which begins with analyzing the distribution patterns, types and characteristics of each green open space. The purpose of this study was to analyze the distribution patterns of public green open spaces based on their types and characteristics. As for the analysis carried out to achieve this goal there are several stages. First, identification of the distribution of public green open space based on its type through field observation; second, an analysis of the distribution of public green open space related to the type is carried out through literature studies and field observations. Finally, analyze the characteristics of each public green open space using statistical descriptive method.Keywords:  public green open space, types, characteristic

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