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INDONESIA
Jurnal Teknologi
Published by Universitas Muhammadiyah Jakarta
ISSN : 20851669     EISSN : 24600288     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering
This journal is a scientific journal to develop knowledge in the field of Engineering & Technology. Editors invite professionals from education and researcher to write about the progress of science in the field of Engineering & Technology. The journal is published 2 (two) times in 1 year.
Arjuna Subject : -
Articles 303 Documents
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PENGARUH PARTISIPASI MASYARAKAT, KUALITAS PELAYANAN PENGELOLAAN SAMPAH DOMESTIK DAN SOSIODEMOGRAFI TERHADAP TIMBULAN SAMPAH DI KECAMATAN MUARA SABAK BARAT KABUPATEN TANJUNG JABUNG TIMUR Donal Ade Putra; Ilham Ilham; Ummi Kalsum
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.101-110

Abstract

Trash is one of the problems that are difficult to solve, trash is considered things that have been not to used again, the purpose of this analysis research factors that predispose level public participation with 3R concept, service quality, and sociodemography characteristics to lumps of trash, a dominant factor that predispose waste generation, and also a state of strategy trash management in districts of Muara Sabak Barat Kabupaten Tanjung Jabung Timur, the benefit of this research is as a suggestion and input for the public and trash managements. This Research uses the mix method sample of 193 respondents, this data analysis make measurements waste generation use of multiple linear regression. The number of trash generation in district Muara Sabak Barat on a day off ranges between 978–1.408 gr/day/KK, in weekdays ranging between 1.275-1.705 gr/day/KK, a while the average number of lumps on weekdays is 1.229 gr/day/people, on a day off between 1.558 gram/day/people. Generation rate district Muara Sabak Barat between 525 gr/day/people. The result Analysis multiple linear regression that is public participant  (-0,07 gr/day/people), service quality     (-6,29 gr/day/people), income (-194,91 gr/day/people) large of page (0.01 gr/day/people) and perception (9,91 gr/day/people). The dominant factor in domestic trash management to lumps of trash is income which is negatively worth 194,91 gr. This point shows that by assuming neglected other independent variables If every increase in income 1 (one) level then the lumps of trash will decrease by 194.91 gr.
ANALISIS KEPUASAN PENGGUNA MENGGUNAKAN METODE PIECES PADA WHATSAPP SEBAGAI APLIKASI KNOWLEDGE SHARING Choriah Choriah; Evy Nurmiati
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.61-68

Abstract

Knowledge sharing has an important role in the student learning process in sharing knowledge with peers and lecturers. Now there is a text message/messenger based feature / application that helps students share knowledge such as whatsapp. But whether WhatsApp can run optimally in the knowledge sharing process or not, we don't know yet, for that it is necessary to analyze whatsapp performance. The purpose of this study is to determine the level of user satisfaction with whatsapp as an application for knowledge sharing. The method used to measure the level of user satisfaction uses the PIECES method. The results of this study indicate that WhatsApp gets an average value of 4.25 which shows that users are very satisfied in using the WhatsApp application as a knowledge sharing application.
ANALISA HAMBATAN TOTAL KARENA PERUBAHAN BENTUK CHINE PADA KAPAL PATROLI Muhammad Satrio Elang Prakoso; Samuel Samuel
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.47-54

Abstract

A patrol ship is a fast ship planning hull type. The planning hull type is a ship designed to reduce wetted surface area at a certain speed to reduce the ship's total resistance. The main function of chine on fast boats is to reduce the hull's wetted surface. Modification of the chine shape can improve the performance of the ship while operating. This research will analyze the effect of using modified chine to improve ship performance. This research uses a numerical method (CFD) which is an overset mesh technique. This method is used to predict the resistance, trim, and heave. The result of CFD simulation in this research indicates that the use of chine can improve total resistance on ships, namely the single chine 10° model. The use of chines on patrol ships can increase trim and heave values.
ANALISA PEMBENTUKAN FILMWISE MENJADI DROPWISE PADA PENANGKAP UAP JENIS DATAR, SEGITIGA DAN SETENGAH LINGKARAN Irfan Santosa; Septian Ade Maulana
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.111-118

Abstract

This study aims to determine the formation of filmwise to dropwise, calculate heating heat, calculate the mass of evaporation, calculate the heat transfer coefficient of condensation and the Reynold value. The research method is by varying the shape of the steam catcher and measuring the water temperature (T1), steam temperature in the water heater (T2), steam catcher plate temperature (T3), environmental temperature (T4), taking documentation to see the process of forming filmwise to dropwise. The results showed that heating water required 284,705.42 Joules. Evaporation mass 0.13 kg. The condensation heat transfer coefficient for each of the vapor traps is hdatar = 1.2759 W / m2 0K, triangle h = 1.0493 W / m2 0K, h half circle = 1.1095 W / m2 0K. The Reynolds number is the Re value of the flat steam catcher = 4547487.192, the Re value of the triangular steam catcher = 4088577.645, the Re value of the semi-circular steam catcher = 4323144.511. which means that the steam flow is included in the Turbulent flow.
PURIFIKASI BIOGAS BERBASIS ABSORBENT ZEOLIT DIAKTIVASI KOH, DAN NAOH TERHADAP KUALITAS BIOGAS Farid Majedi; Agus Choirul Arifin; Indah Puspitasari; Shofyan Dwi Saputro; Septian Nurfaranto
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.55-60

Abstract

Fossil fuel reserves are increasingly depleting and non-renewable. The choice of utilizing alternative energy sources that are renewable and environmentally friendly is a very smart thing to do. Biogas is a renewable energy and is environmentally friendly and inexpensive. The element CO2 can interfere with the combustion process. To increase the quality of biogas, it is possible to reduce the interfering CO2 element in the process. Purification is one way to purify the CO2 content of biogas. Burning. In this study, biogas purification was carried out by absorbing carbon dioxide (CO2) using zeolite which was activated by heat treatment of 300oC and Potassium Hydroxide (KOH) and Sodium Hydroxide (NaOH) solution, namely by varying the flow rate of biogas entering the purifier. The test was carried out on 4 variables, namely non-purified biogas, at a rate of 3 l/m, a rate of 5 l/m, and a rate of 7 l/m. Based on this study, the results obtained, the greater the flow rate of biogas, the lower the CO2 content and the higher the CH4 content. The lowest CO2 content at variablel 5 L/minute was 2952.78 ppm. The highest content of CH4 is 45845.25 ppm at 7 L/minute. The best condition of this research is the flow speed variable of 7 L/min with CH4 and CO2 content of 45845.25 ppm and 2967 ppm.
PREPARASI EKSTRAK BAYAM MERAH (AMARANTHUS GANGETICUS) UNTUK APLIKASI DYE SENSITIZED SOLAR CELL (DSSC) Farradina Choria Suci; Arnisa Stefanie
Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.2.147-154

Abstract

Solar energy is the most beneficial renewable energy, because it is not limited, not called by geographical location, and not environmental pollution. Solar energy can be converted into electrical energy using Solar Cells. Dye Sensitized Solar Cell (DSSC) is a form of renewable energy with several advantages, such as low fabrication costs and high photoelectric efficiency. The structure of the DSSC device consists of five components, namely conductive substrate, semiconductor filmization, sensors, redox in the form of electrolytes and opposing electrodes. The proper use of semiconductor materials and photosensitizers can produce high photoelectric power. Included in the DSSC application, dyestuff is a component that has an important role. In this study, dye extraction was done using red spinach leaves (Amaranthus gangeticus) with maceration techniques. Red spinach is one potential that can be developed into dyes because the red color of spinach contains natural pigments. Red spinach extract uses maceration techniques because of simple and sophisticated workmanship that is simple. The results of the red spinach extract were then tested using UV-Vis, FTIR, and cyclic voltammetry.
PERANCANGAN REAKTOR UNTUK PRODUKSI BIODIESEL GENERASI 2 DARI BIOMASA SAWIT Maharani Dewi Solikhah; Adi Prismantoko; Adinda Prawitasari; Bina Restituta Barus; Agus Kismanto
Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.2.197-212

Abstract

Indonesia has abundance of biomass that underutilized, including oil palm biomass in such as empty fruit bunches and palm fronds. The biomass can be converted into biohydrocarbons through a pyrolysis process that produces bio-oil and followed by an up-grading process to improve its quality. Upgrading Bio-oil into biohydrocarbons can be conducted through various production processes, including hydrothermal processes. Bio-oil has different chacateristic compared to diesel fuel. Bio-oil has a high water content (11-50%), high acidity, and high viscosity (> 40 cP). Based on these characteristics, the hydrothermal process has the advantage of being able to operate with raw materials that have a high water content. The operating conditions of the hydrothermal process are 300 – 400 oC, 150 – 200 bar. For this reason, a bio-oil upgrading reactor was designed using a hydrothermal process to operate at a temperature of 420 oC and a pressure of up to 220 bar.
PENGGUNAAN METANOL SISA REAKSI SEBAGAI REAKTAN PADA PROSES TRANSESTERIFIKASI MINYAK KELAPA SAWIT MENJADI BIODIESEL Elvianto Dwi Daryono; Febriara Fassa Aulia Rahman; Zukhriyah Zukhriyah
Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.2.155-162

Abstract

In the process of making biodiesel with a transesterification reaction, an effective, efficient and inexpensive raw material is palm oil because of its abundant availability. In the transesterification process, the addition of methanol is deliberately exaggerated so that the reaction shifts towards the product and the reaction is more perfect and the excess methanol reagents in the process can be reused as reactants. This research was conducted to obtain optimal levels and yield of methyl esters by utilizing the residual methanol reaction. The transesterification process is carried out at 65°C, the molar ratio of palm oil: methanol is 1: 6, the mass of NaOH catalyst is 1% oil mass and the stirring speed is 150 rpm. The residual methanol from the transesterification reaction is used as a reactant in the subsequent transesterification reaction by varying the mass of the remaining methanol addition of the reaction which is 5%, 10% and 15% of the mass of the initial methanol and also varying the reaction time of 15, 30, 45, 60 and 75 minutes. From the results of the research, it was obtained the optimum conditions for the addition of 5% residual reaction methanol and 60 minutes reaction time, get a yield of 90.60% and a concentration of methyl ester 97.69% (meet SNI 7182: 2015). Methyl ester products at the optimum process conditions also meet SNI 7182: 2015 for densities of 0.85 gr / ml and acid valuesof0.42mg-KOH/gr.
SISTEM INFORMASI MANAJEMEN ASET MENGGUNAKAN METODE GARIS LURUS DAN MULTI ATTRIBUTE UTILITY THEORY (STUDI KASUS : SMAN 3 CIMAHI) Tasya Wiendhyra; Nisa Hanum Harani; Roni Habibi; Rolly Maulana Awangga
Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.2.213-220

Abstract

Asset management carried out by SMA Negeri 3 Cimahi is intended to manage assets at the school to support education and teaching and learning activities at schools. Asset management has been managed by the head of the asset warehouse. The whole process is still done manually by written it out then transferred to Microsoft Excel. For borrowing still use manual forms that are not compiled according to the year and existing items. In impairment  of asset, there is no recommendation for deletion that can facilitate decision making for asset deletion. Based on these problems, it is necessary to make an information system that can handle the asset management process. This information system is used by three Users, namely the Principal, the warehouse (asset) and the facility wakasek. The method of depreciation of assets used to perform calculations in this study is a straight line. Then the method for making decisions on goods to be deleted is the Multi-Attribute Utility Theory method with 3 criteria,  condition of the goods, book value, and the remaining economic life. This information system is web-based to increase the efficiency of schools in using information technology. The calculation tests carried out using the system and manual get the same results, the straight-line method on school desk assets purchased in 2018 at a price of 4,000,000, the depreciation on this month is 358,568. And for the Multi Attribute Utility Theory method, a recommendation for removal is obtained, namely a wooden cabinet with a final value of 0.8.
EVALUASI KOMPETENSI INDUSTRI 4.0 PADA TENAGA KERJA INDUSTRI DI KABUPATEN KARAWANG Dimas Syaripudin; Rianita Puspa Sari; Aulia Fashanah Hadining
Jurnal Teknologi Vol 14, No 2 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.2.163-172

Abstract

Industry 4.0 is called the fourth industrial revolution which brings a paradigm shift in the production industry so that it gives a big impact on the industrial value chain. The concept of industry 4.0 illustrates the increase in digitalization of the entire value chain and results in the interconnection between people, objects and systems through real-time data exchange so that this will be a challenge for companies is facing charges in the era of the industrial revolution 4.0. in this change the company effectively needs to plan for sustainable human resource development. The characteristics of Industry 4.0 that tend to focus on technology and ultimately create a gap between competencies and the expertise needed by Industry 4.0. Therefore, companies need a competency model that is needed by suitable industrial workers in facing industry challenges 4.0. This study aims to analyze the results of the evaluation of employee competencies in companies in the district. Karawang. Employee competency evaluation at companies in the district. Karawang uses multidimensional scaling analysis methods, importance-performance analysis and gap analysis, and radar chart analysis. Based on the results of the study, the multidimensional scaling method aimed at the similarity of characteristics in the use of social competencies and personal competencies of employees in Kab. Karawang has a high similarity of characteristics with the stress value on the perception map of 0.146 or 15% and the R2 value generated is 0.907 or 91%. The largest gap value is owned by the construct of Industry 4.0 competencies with a value of -0.99. The smallest gap value is assumed by the construct of Technical competencies with a value of -0.45. priority levels of competency that need to be improved by employees in Kab. Karawang in the industrial era 4.0 was categorized in the main priorities: social competencies and industry 4.0 competencies, the category of maintaining achievement: Personal competencies and excessive categories: methodological competencies and technical competencies.

Page 21 of 31 | Total Record : 303

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