Journal of Applied Sciences and Advanced Technology
Journal of Applied Sciences and Advanced Technology (JASAT) is an international peer-reviewed journal dedicated to interchange for the results of high quality research in all aspect of applied sciences, advanced technology. The journal publishes state-of-art papers in fundamental theory, experiments and simulation, as well as applications, with a systematic proposed method, sufficient review on previous works, expanded discussion and concise conclusion. As our commitment to the advancement of science and technology, the JASAT follows the open access policy that allows the published articles freely available online without any subscription.
Articles
68 Documents
<![CDATA[Analysis of Steering Wheel Heavy Komatsu Dump Truck Unit (HD) 785-7 ]]>
<![CDATA[Hasan Basri]]>;
<![CDATA[Ery Diniardi]]>;
<![CDATA[Kisman H Mahmud]]>;
<![CDATA[Syawaluddin Syawaluddin]]>;
<![CDATA[Firmansyah Firmansyah]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 2, No 2 (2019): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.2.2.49-52
<![CDATA[Steering system is a system control unit that is used for deflecting the direction of motion straight into to the left or to the right in accordance with the will of the operator. At 785-7 HD unit using the steering system type full hydraulic steering valve, where steering valve serves as a directional control valve to direct the oil flow at the time of engine working (pump work), whereas when the engine died steering valve will serve as a hand pump and directional control valve. Abnormaly steering wheel because there is a scratch on spool demand valve causing internal leakage in the demand valve so oil pressure which served as the pilot sensing to move the spool valve is a pressure demand would drop because there is a leak and could not afford to drive the spool until the full open- as a result the oil flow from the steering pump cannot be fully prioritized to steering valve to be forwarded to the steering cylinder.]]>
<![CDATA[Calculation of Freezing Heat Load of Catches on Refrigeration Machines of KM. Sumber Natuna in Natuna Waters Province of Kep. Riau ]]>
<![CDATA[Ade Hermawan]]>;
<![CDATA[Teguh Binardi]]>;
<![CDATA[Sony Uji Permana]]>;
<![CDATA[Istianto Budhi Rahardja]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 1, No 3 (2019): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.1.3.99-104
<![CDATA[Refrigeration is the process of absorption of heat from the room with high temperature and transfer the heat to a certain medium. Application of refrigeration is used to maintain the quality of a product, foodstuff, medicine, air conditioning and others. In the world of refrigeration fisheries are used to maintain the quality of the catch so that its economic value and nutritional value is maintained up to the hands of consumers. In general, the main component of refrigeration is divided into five namely compressor, condenser, receiver, expansion valve, evaporator. One of the components that has a role in heat absorption is the evaporator. Evaporator function for evaporation process of refrigeration material. The low-pressure refrigeration vapor is sucked from the evaporator into high-pressure, high-temperature refrigeration vapor. Then through the condenser the steam is condensed (heat exchange) so that the refrigerant vapor becomes high-pressure and normal temperature refrigerant liquids. Heat exchange can be through three ways: by air, water or air + air. After that the liquid refrigerant dropped the pressure on the expansion valve so that the high-pressure refrigerant liquid becomes low. Then on the evaporator component refrigerant material evaporated, in this process the absorption of heat in the product occurs so that the product can be cool temperatures even frozen. The larger the heat is absorbed in the evaporator, then the work on the refrigeration machine is also getting bigger. Based on research in one trip, the heat load at KM. Natuna source reached 147,716.9 kJ / hour. Associated with the fuel consumption of the generator drive motor in a single trip KM. Sumber Natuna reached 2.14 tons.]]>
<![CDATA[Analysis and Implementation of Backup Line Network Using Branch Office VPN and Speedy Internet Broadband ]]>
<![CDATA[Kotim Subandi]]>;
<![CDATA[Adriana Sari Aryani]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 1, No 2 (2018): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.1.2.39-48
<![CDATA[The purpose of this research is to build computer network infrastructure that connects between head office and branch office (Site), so that all network connection performance can be upgraded to help and support the company's business objectives. In order for these needs can be met well and can overcome the problems of technology failure when communication and information exchange is underway, the technology will be used is a connection that can always be online with the aim that quality in service approaching 100% (service excellent). Network Infrastructure to be implemented is to use two lines of connection, the first is to use Telkom Metro Ethernet, and the second connection Branch Office VPN by using internet line broadband speedy from Telkom, if one of the connection down then the other connection as a backup, and if both connections are in stable and good condition, it can be ascertained both connections can serve conveying data simultaneously. Which is used to set the two connections in the topology holder built head office with Head Office(Site)is Cisco Router]]>
<![CDATA[Analysis Optimization of Switchyard Earthing System Using MATLAB ]]>
<![CDATA[Deni Almanda]]>;
<![CDATA[A I Ramadhan]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 2, No 3 (2020): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.2.3.77-82
<![CDATA[One of the main factors in securing an electric power system is the earthing system. The earthing system in the generating unit is closely related to the switchyard. Switchyard earthing system analysis is done by adjusting the grid distance and ground rod length to get the most optimal quality and cost combination. The definition of optimal conditions in this case is limited to circumstances where there is a combination of quality that does not exceed the technical tolerance threshold and has cost efficiency. The analysis of the switchyard earthing system was taken as a case study. Calculation results and analysis concluded that the grid distance of 23 m and the length of the 6 m ground rod is the best choice in the optimization of this earthing system by meeting the safety quality criteria for earth resistance is Rg = 0.13806 Ω less than 0.5 Ω with a minimum cost of Rp. 1,220,104,730.Technical standards are carried out based on IEEE Std 80-2000. Calculations for obtaining technical parameters and costs are carried out one-by-one in the range of grid spacing and length of certain ground rods to determine the optimum point using MATLAB-GUI as a programming tool and MATLAB R2011a as a tool mathematical computing.]]>
<![CDATA[Value Chain Analysis Indonesian Animal Husbandry Industry ]]>
<![CDATA[Kotim Subandi]]>;
<![CDATA[Hermawan Hermawan]]>;
<![CDATA[Adriana Sari Aryani]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 2, No 1 (2019): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.2.1.21-28
<![CDATA[At least until 2017, a very low production capacity coupled with livestock methods that are still traditional causes almost all major livestock commodities in Indonesia to close their deficits through imports. Meat, milk, eggs, and even the skin, all of them still cannot be fulfilled entirely from the country.As much as 83% of raw material for the dairy industry is imported. Leather processing industry, importing raw materials for cow leather by 3 million pieces and 13.5 million pieces (sheep and goat skin). Specifically for beef, it was noted that 2016 was the highest volume of beef imports reaching 132.74 thousand tons. As for eggs in general, the pattern of development of export volume is lower than the rate of imports per year. Data on chicken meat imports and their values during the 2012-2016 period showed quite high values compared to export volumes. Knowledge of industry value chains is needed to explore the gap in the dependence of imported raw materials.The value chain analysis carried out in the livestock base industry chain shows a map of the relationship between a number of livestock industry bases in Indonesia so as to facilitate the breakdown of dependence on raw materials. Analysis carried out on the main chain (livestock base) and joint chain (supporting base). Five farm-based industry value chains have been assembled, namely: 1) beef-cattle base industry; 2) industrial livestock-poultry meat base; 3) dairy-based livestock industry; 4) leather-based industry base; and 5) egg-based livestock industry. Core industries or prime movers namely: a) RPH on beef chains, b) industrial pasteurization in the milk chain; c) tanning industry on leather chains; d) food freezing industry on chicken meat chains; and e) egg packing house on the egg chain. The existence of the core industry greatly determines the position of the raw materials of the downstream industry.]]>
<![CDATA[Analysis of Viscosity of Lubricating Oil on Generator Machine Working Hours at KP. Macan Tutul 4203 ]]>
<![CDATA[Ade Hermawan]]>;
<![CDATA[Istianto Budhi Rahardja]]>;
<![CDATA[M Yusuf Syam]]>;
<![CDATA[Hendro Sukismo]]>;
<![CDATA[Nur Fatah]]>;
<![CDATA[Mardiono Mardiono]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 1, No 3 (2019): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.1.3.69-74
<![CDATA[Lubricating oil is a liquid used as a lubricant in a machine to reduce wear due to friction, and as a coolant and silencer, but high temperatures on the engine will damage the lubricant. When the lubricant power is reduced, the friction will increase and then the heat will arise more and more so that the temperature continues to increase. Engine oil should have high viscosity or viscosity, not inflammable not easy to oxidize and not frothy due to high rotation that occurs inside the machine. other than that lubricating oil serves to protect the inside of an engine parts from rust or corrosion caused by liquids in lubricants and acid properties which are the result of high temperature combustion in the machine. The purpose of this research is to know the viscosity and content contained in lubricant oil of Meditran sx plus SAE 15W-40 in hours of use 50,100,150 and 200 hours of machine work with laboratory test method. The results obtained in the laboratory test viscosity of new lubricant oil is 14.55 cSt to the use of lubricating oil 50 hours of machine work, then the use of lubricating oil 100 hours working machine, there has been a decrease in viscosity from 13.15 cSt to 12.85 cSt and on usage lubricating oil 150 working hours fixed viscosity of 12.85 cSt then on the use of lubricating oil 200 hours of work decreased viscosity to 12.62 cSt.]]>
<![CDATA[The Effects of Soil Amended with Solid Fibrous Waste on The Morphological Quality of Oil Palm (Elaeis guineensis Jacq.) Seedling ]]>
<![CDATA[Sylvia Madusari]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 1, No 1 (2018): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.1.1.15-22
<![CDATA[Organic materials as industrial by-products are potentially used as alternative growth media composites with the aim of reducing the use of top soil and improving the quality of plants in the nursery. Mesocarp of palm fruit (fiber) and coconut fiber powder (cocopeat) are rich in plant nutrients. Composting of these by-products will be helpful in recycling and re-use of biodegradable waste useful for growing media. This research use Completely Randomized Design (CRD) one factor consist of 4 treatment. The treatment were (a). P0 = sub soil 100% (control), (b). P1 = 50% mesocarp fiber composts + 50% sub soil, (c). P3 = 50% cocopeat composts + 50% sub soil, and (d). P3 (mesocarp fiber 1 kg + cocopeat fiber 0.5 kg + 0.5 kg cattle dung) composts + sub soil 50 %. Growing media that consists of 50% mesocarp fiber and 50% sub soil (P2) was suitable as growing medium in early seedling. Compost of mesocarp fiber has the content of C-organic 52,28%, N 1,37%, C / N ratio 38,11%, P2O5 0,47%, K2O 0,89%, Mg 0,23%. The use of composted mesocarp fiber media mixed with 50% sub soil showed significant effect on the growth of seed diameter of oil palm seedlings at age 3 MAP.]]>
<![CDATA[Design Optimization of Distance Grid and Ground Rod in The Earth System ]]>
<![CDATA[Deni Almanda]]>;
<![CDATA[A I Ramadhan]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 2, No 2 (2019): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.2.2.53-58
<![CDATA[One of the main factors in securing an electric power system is the earthing system. The earthing system in the generating unit is closely related to the switchyard. Switchyard earthing system design is done by adjusting the grid distance and ground rod length to get the most optimal quality and cost combination. The definition of optimal conditions in this case is limited to circumstances where there is a combination of quality that does not exceed the technical tolerance threshold and has cost efficiency. The design of the switchyard earthing system was taken as a case study. Technical standards are carried out based on IEEE Std 80 - 2000. Calculations for obtaining technical parameters and costs are carried out one-by-one in the range of grid spacing and length of certain ground rods to determine the optimum point using MATLAB-GUI as a programming tool and MATLAB R2011a as a tool mathematical computing. Calculation results and analysis concluded that the grid distance of 23 m and the length of the 6 m ground rod is the best choice in the optimization of this earthing system by meeting the safety quality criteria for earth resistance is Rg = 0.13806 Ω less than 0.5 Ω with a minimum cost of Rp. 1,220,104,730.]]>
<![CDATA[Analysis Cause of Automatic Voltage Regulator Damage to the Genset in KP Hiu 06 Owned the Ministry of Marine and Fisheries ]]>
<![CDATA[Sobri Sobri]]>;
<![CDATA[Ade Hermawan]]>;
<![CDATA[Edwin Haryanto]]>;
<![CDATA[Istianto Budhi Rahardja]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 2, No 1 (2019): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.2.1.1-6
<![CDATA[AVR on an electric generator is a device that serves to maintain the stability of the generator output voltage. KP Shark 06 suffered AVR damage twice in 2017 which affected the operations of the ship so it is necessary to analyze the cause of the damage. The steps to analyze the causes of AVR damage starts from the factor of overload on the electricity generator, the working condition of the electric generator and the motor driving factor of the electric generator. Based on observations and calculations of the ship's electricity load, it is known that there is no overload of electric generators, ie the average per day / hour of power used is 6,009.75 Watt, where the available power is 17,600 Watt (generator efficiency 34.14%). While the work of the generator is observed normally based on the results of the measurement of the electric current produced by the generator. It was concluded that the cause of AVR damage was due to the generator driving motor which experienced a decrease in performance so that when subjected to electric load the engine rotation experienced instability which caused voltage fluctuations where this caused the AVR to work abnormally resulting in AVR damage. After repairs to the generator drive engine during ship docking, the engine rotation of the electric generator drive motor becomes more stable and the working function of the AVR becomes more normal.]]>
<![CDATA[Design of Infiltration Well to Reduce Inundation in Rawa Makmur Village, Bengkulu City ]]>
<![CDATA[Meilani Belladona]]>;
<![CDATA[Narlis Nasir]]>;
<![CDATA[Endri Agustomi]]>
<![CDATA[ Journal of Applied Sciences and Advanced Technology Vol 1, No 2 (2018): Journal of Applied Sciences and Advanced Technology ]]>
Publisher : <![CDATA[Faculty of Engineering Universitas Muhammadiyah Jakarta ]]>
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DOI: 10.24853/jasat.1.2.53-58
<![CDATA[Rawa Makmur Village, especially Merpati I, has an area of 3.6 hectares, has experienced land use changes of 30% in the last 3 years. The purpose of this study is to design infiltration wells to reduce inundation that often occurs in this region. The data used are primary data (soil sampling and laboratory testing) and secondary data (rainfall data, land use data and other supporting data) that are processed using hydrological analysis and hydraulic analysis. Based on the results of data processing obtained the intensity of rainfall with a 20-year return period is 2.56 mm/hour and the flood discharge plan is 0.01229 m3/s. The household debit is 0.212 m3/s, the roof discharge is 0.00000037 m3/s, so the total debit that must be reduced is 0.222 m3/s. The soil sample at the study location is taken and tested in the laboratory. The test results show the soil permeability coefficient is 2.630 x 10-4 m3/s. Infiltration discharge into the soil is 0.000152 m3/s, then the reduced discharge is 0.2218 m3/s. Based on the analysis results obtained the design of infiltration wells with a diameter of 1 meter and a depth of 2.2 meters. One well was effectively used for 2 houses with a reduction of 0.2218 m3/s with a reduction time of 1,297 minutes.]]>
