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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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Analysis Of Service Quality Level Using Service Quality (Servqual) And SWOT Methods For Increasing Customer Satisfaction Nasution, Alya Salsabila; Nadya, Yusri; Pramanda, Ryan
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.291-300

Abstract

PT PLN Unit Layanan Pelanggan (ULP) Langsa is one of the implementing sub-units under the Customer Service Implementation Unit (UP3). The increase in the amount of electricity consumption is soaring high and fast, this has made the standard level of community satisfaction higher as a result of the increasing income of a modern society. A service is considered satisfactory if the service can meet the desires, expectations and needs of customers. The purpose of this study was to determine the gap between customer expectations and perceptions about the services of PT PLN ULP Langsa and the order of priority for service quality improvement that must be corrected first. One of the methods used to measure service quality is the Service Quality (Servqual) method. The results of calculating the servqual value obtained a gap value with all statement items, namely -2.23, this indicates that the services provided by PLN are currently still unable to provide optimal service to customers. Based on measurements of the 5 dimensions of Servqual, the results show that the five dimensions of service quality have values below 0 in order of priority for improvement, namely the Reliability dimension with a gap of -1.01, the Responsiveness dimension with a gap of -0.86, the Tangible dimension) with a gap of -0.62, the Assurance dimension with a gap of -0.56, and the Empathy dimension with a gap of -0.55. Based on the results of the SWOT analysis, the main improvement strategy proposed is the SO (Strength - Opportunity) strategy.
Analysis of Heavy Equipment Quantity using Quantitative Methods Software (QM) for Windows V5 on Road Infrastructure Works Citra, Zel; Ashadi, Reza Ferial; Wibowo, Paksi Dwiyanto; Malinda, Yosie; Apdeni, Risma; Kinasih, Reni Karno; Fitriansyah, Erlangga Rizqi
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.203-212

Abstract

Data from the Geological Agency, Ministry of Energy and Mineral Resources (ESDM) in 2018, Indonesia has 37 billion tons of coal with proven reserves of 20.11 billion tons and estimated reserves of 17.02 billion tons. The total reserves increased by 12 billion tons compared to the previous year. To increase production and reserve coal, it is necessary to build mine roads to connect other mining areas. One of them is the work of transporting soil material for road embankment work. The constraints that are often encountered are limited resources and high cost of equipment. Therefore it is necessary to optimize the need for heavy equipment using Quantitative Methods Software (QM) for Windows V5. The data used in this study are primary data taken from the interview process and data in the form of related secondary documents, namely the RAB, Scheduling, SPK and other documents. The tools that will be used and optimized are a lot of digging and loading equipment such as Excavator PC400 with a bucket capacity of 2.6 m3, Excavator PC300 with a bucket capacity of 1.8 m3, Excavator with a bucket capacity of 0.8 m3 and a Dump Truck with a body capacity of 22.3 m3 as transportation equipment. The results of the research data analysis show that the most optimal number of tools needed for the road works is 1 PC300 Excavator unit, 1 PC200 unit and 3 Dump Truck (ADT) units for a work volume of 99.626 m3 and the optimal work duration is 814 hours and the labor cost is Rp. 2,781,227,681. Excavator with a bucket capacity of 0.8 m3 and a Dump Truck with a body capacity of 22.3 m3 as transportation equipment. The results of the research data analysis show that the most optimal number of tools needed for the road works is 1 PC300 Excavator unit, 1 PC200 unit and 3 Dump Truck (ADT) units for a work volume of 99.626 m3 and the optimal work duration is 814 hours and the labor cost is Rp. 2,781,227,681. Excavator with a bucket capacity of 0.8 m3 and a Dump Truck with a body capacity of 22.3 m3 as transportation equipment. The results of the research data analysis show that the most optimal number of tools needed for the road works is 1 PC300 Excavator unit, 1 PC200 unit and 3 Dump Truck (ADT) units for a work volume of 99.626 m3 and the optimal work duration is 814 hours and the labor cost is Rp. 2,781,227,681.
Utilization of Sengon Wood Ash for Soil Stabilization and Its Impact on Unsoaked CBR Value Fathonah, Woelandari; Mina, Enden; Kusuma, Rama Indera; Ramdani, Fahreza
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.117-126

Abstract

Soil is one of the critical factors influencing construction robustness. The land situated in Cibingbin Village, Cibaliung District, Pandeglang Regency, falls under the category of soil with low bearing capacity. Therefore, the soil in this area requires stabilization to enhance its load-bearing capacity. The field's CBR value, determined through DCP testing, was found to be 2.67%. The target CBR value for subgrade suitability is 6%, indicating the necessity for soil stabilization at this location. This study aims to assess the physical characteristics of the native soil and its CBR value after stabilization using sengon wood ash. Various percentages of sengon wood ash, namely 4%, 6%, 8%, 10%, and 12%, were utilized with curing periods of 0 and 3 days. Soil classification was performed using the USCS method, and the CBR test conducted was the unsoaked CBR test. The results revealed that the addition of 4% sengon wood ash, with a 3-day curing period, yielded an optimum CBR value of 7%. Sengon wood waste ash proved effective in increasing the CBR value. Furthermore, the use of sengon wood ash did not significantly reduce the plasticity index (PI) value. After stabilization with sengon wood ash, the PI value remained at 35.685%, categorizing it as highly plastic. Additional research is recommended to address the limitations of sengon wood ash and achieve a significant reduction in the PI value to meet the subgrade criteria
Prediction of Onset Temperature in Standing Wave Thermoacoustic Engine with Mesh Screen Stack Murti, Prastowo; Astuti, Wijayanti Dwi; Setiawan, Ikhsan; Irsyadi, Fakih; Hudati, Imroatul
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.27-32

Abstract

A thermoacoustic engine is a engine that converts thermal energy into acoustic energy, which can be used to generate electricity or cooling. This engine is attractive because it consists only of a stack, heat exchangers, and a resonator. The stack serves as the primary component for the energy conversion process and consists of porous materials like an array of stainless steel mesh screens. To generate the acoustic energy, a minimum temperature difference is necessary between the two sides of the stack, called the onset temperature difference. However, the calculation for prediction of onset temperature on the stack made of mesh screen has not been addressed. Therefore, the objective of this paper is to propose a method that can be used to estimate the onset temperature difference in standing wave thermoacoustic engine with stacks made of mesh screen arrays. The onset temperature difference is predicted numerically using linear stability theory and matrix transfer methods. Experimental verification is carried out by using standing wave thermoacoustic engine from pervious study. The results showed that the lowest onset temperature difference (TH - TC = 140ºC) is obtained when rh = 0.497 mm. Furthermore, the numerical and experimental onset temperature difference comparisons show a qualitative agreement, allowing the onset temperature prediction method to be used in designing standing wave thermoacoustic engines with stacks made of mesh screens.
Analysis Characteristics Hybrid Coolant Nanoparticles As a Cooling Media for Genset Generator Rantawi, Azhar Basyir; Saputra, Hendra; Siregar, Ahdiat Leksi; Rahardja, Istianto Budhi; Susanto, Edy; Ramadhan, Anwar Ilmar
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.259-266

Abstract

Industry nanotechnology- based is a very significant new modern era, where throughout field develop and use it. In the world of technology as primary needs at the moment This for society, has Lots use results its products. Cooling system as balancers in the industrial world including generators require gensets research and development For cool diesel generator engine . Hybrid coolant has composition 30% material  natural and 70% distilled water. The addition nanoparticles to in hybrid coolant of 1% (TiO2-SiO2-Al2O3 ). The test was carried out is temperature point education, pH value, density. Analysis results The characteristics of hybrid coolant are point boiling 99°C, pH value between 5.79-6.06, as well mark density of 1,012-1,024.
Effect of Mass Composition on Nano Zircon Synthesize from Local Zircon Sand Using Soda-Precipitation-Calcination-Caustic Fusion Method Sari, Alvika Meta; Ramadhan, Anwar Ilmar; Rahardja, Istianto Budhi; Umar, Efrizon; Yudistirani, Sri Anastasia; Faisal, Akmal Imam; Fikriyansyah, Fikriyansyah; Azmi, Wan Hamzah
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.169-178

Abstract

Zircon sand has the major component of ZrO2 with impurities SiO2, Fe2O2, and TiO2. Zircon sand can be synthesized using various methods, such as caustic fusion method. This research purposed to determine the effect of the mass composition of NaOH on fusion process of zircon sand and to find the optimal mass ration of NaOH on yield and characteristics of nano zircon produced. This research was conducted using caustic fusion and precipitation process to obtain the mass ration of NaOH in best zircon sand fusion (melting) process. The nano zircon obtained was analyzed its size using SEM and chemical composition using FTIR. The result show that the correlation between NaOH ration and yield following the equation y = 0.42x2-2.532x+3.908 and R2 =0.9696. It showed that the higher NaOH composition will reduce the size of nano zircon. The optimum NaOH ratio is 1 : 3.6 with size od 41.983 nm and yield 1.84% which in white, odorless and powder texture. The FTIR spectrum showed the presence of the -Zr-O2 functional groups at wave numbers 600 – 700 cm-1.
The Effect Of Pitch Ratio On Screw Turbine Performance With Tip Fin Adiwidodo, Satworo; Ahmad, Masrur Maulana
Jurnal Teknologi Vol 16, No 1 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.1.75-82

Abstract

A water turbine is an energy conversion machine that converts water head into shaft movement. In screw-type turbines, performance is influenced by several parameters including outer diameter, inner diameter, rotor length, head angle, number of blades, and pitch distance. This research uses a screw turbine type with a tip fin. The research aims to determine the performance of screw turbines with tip fins on mechanical power and efficiency. The research independent variables consist of pitch ratio and flow rate. The pitch ratio variations used are 1.2; 1.4 and 1.6 while the variations in flow rate used are 3 l/s, 3.5 l/s, and 4 l/s. The method used in this research is experimental. This study's data analysis employed the two-way Anova method with an alpha (α) of 5%. Anova's results show that the P-value of the interaction of the two independent variables, pitch ratio and water discharge, is <0.05, meaning that the independent variables have a significant influence on the performance of the screw turbine. The highest turbine performance results were at a pitch ratio of 1.4 at a water flow rate of 4 l/s resulting in an efficiency value of 34.91% and a mechanical power value of 6.82 watts at a rotational speed of 125 RPM. The lowest turbine performance results at a pitch ratio of 1.2 with a flow rate of 3 l/s resulting in an efficiency of 22.64% and a mechanical power of 3.32 watts at a rotational speed of 56 RPM.
Simulation of The Effect of Interfrency and EIRP on To DVB-S2 and DVB-RCS2 Network QOS Saputra, Heskia Jefri; Alfatih, Faiz; Alimi, Sabri
Jurnal Teknologi Vol 16, No 2 (2024): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.16.2.251-258

Abstract

Satellite communication technology in aircraft is used for long-distance communication between aircraft and outside parties, This study uses NS-3 as software to simulate satellite communication process and analyze QoS based on DVB-RCS and DVB-S2 technology looking at  throughput, delay, PDR parameter values. This simulation aims to obtain QoS value of data sent from the user terminal to gateway based on variations in antenna gain and to determine the effect of  interference level caused by noise on user's device on quality of data reception. Results of running from UT to GW five variations of antenna gain, namely 28, 29, 30, 33, 35 Dbi, Average throughput is 29.9301 Kbps, delay is 48.9212 s, and PDR is 29.7322%. For the results of running from GW to UT with same five variations of antenna gain and five variations of noise, is 0 db, 24.7 db, 49, 7db, the throughtput results are 203.549 Kbps with delay of 0, 263834 s, and PDR is 99.91%. The conclusion obtained is that simulation using NS-3 simulator tool with an antenna amplifier has increased throughput, delay, and PDR as well as service quality and level of user interference is stable and doesn’t experience a decrease in package delivery.
Workload Analysis in Quantity Optimization Labor Using FTE And RSME Methods in the Packaging Department of a Pharmaceutical Company Ramadhan, Gilang; Hernadewita, Hernadewita
Jurnal Teknologi Vol 17, No 1 (2025): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.17.1.63-70

Abstract

Human Resources (HR) is one of the most important parts of a company, as the main driver to achieve company goals. The company requires a workload calculation to determine the workload received by its employees. The method used in this workload calculation is Full Time Equivalent and Rating Scale Mental Effort to calculate the workload received by employees of the solid packing department in each packaging process. The results of this study on the blistering, sleeving, IPC, sealing, and shippering processes are in the normal category with a workload value in the range of 1-1.28, while the cartoning process is in the overload category with a workload value of 1.60 . The results of the RSME value calculation on the blistering and sleeving processes get a weighting value in the range of 71-85 with a moderately large category, the IPC, sealing, and shipping processes get a weighting value in the range of 59-70 with a fairly large category, while the cartoning process gets a weighting value in the range of 86-100 with a large category. So it's necessary to add 1 employee so that the FTE value is distributed properly or the workload is normal and the RSME becomes fairly large.
Analysis of Flexural Strength of Concrete Regarding the Addition of Fly Ash as A Particular Replacement Material for Cement Zulkarnain, Fahrizal; Al Asri, Ramadhan; Siregar, Zulkifli; Muthusamy, Khairunisa
Jurnal Teknologi Vol 17, No 1 (2025): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.17.1.79-88

Abstract

This study a number of additional materials were added to reduce the amount of cement by using fly ash from coal combustion to determine the flexural strength value of concrete. Use of fly ash additives 5% 10% 15%. For normal concrete the flexural strength value is 2,66 MPa. For the flexural strength value of concrete with a BFA variation of 5% is 2,67 MPa, For the flexural strength value of concrete with a BFA variation of 10% is 2,71 MPa, and for the flexural strength value of concrete with a BFA variation of 15% is 2,72 MPa. From the results of this study it can be concluded that the more fly ash mixture, the higher the flexural strength value.

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