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Anwar Ilmar Ramadhan
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INDONESIA
Journal of Applied Sciences and Advanced Technology
Published by Universitas Muhammadiyah Jakarta
ISSN : -     EISSN : 26226553     DOI : 10.24853/jasat
Core Subject : Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering
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.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 94 Documents
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Alert Control Model for Exposure of COVID-19 in Industrial Closed Work Space Hermawan Hermawan; Kotim Subandi; Adriana Sari Aryani; Syarif Hidayatullah; Dinar Munggaran Akhmad; Victor Ilyas Sugara
Journal of Applied Sciences and Advanced Technology Vol 5, No 3 (2023): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.5.3.105-112

Abstract

The Covid-19 pandemic has changed the industrial management system, including the regulation of labor. Most of the work in the industry cannot be done through work from home, but must still be in production units. In a number of cases, clusters of COVD 19 were found in the industry, forcing the industry to have to lock down. The problem of the lack of a model for controlling the spread of COVID 19 in the manufacturing industry is the basis for this research. The model designed in this study is also expected to be relevant in the new normal era for the manufacturing industry. The modeling and application of COVID-19 control research in the manufacturing industry is carried out through four stages, namely identification and characterization of work patterns, model design and validation, model implementation and verification, and model comparison testing. At the stage of identification and characterization of work patterns using the methods as guided by the International Labor Organization. The design phase and model validation used the Epidemic Mathematics approach and the Shewhart Control Chart. The application of the model in the industry is in accordance with the guidelines for working in a factory during the COVID-19 Pandemic according to the World Health Organization. The comparative test of the model will be processed using the diversity test. The data used is collected from the company in the form of simple tracing monitoring data for workers before entering the work area and shortly before leaving the work area, COVID 19 test data if any, employee health data, and other data if relevant to support this research. The data obtained is used for model design, both the employee health control model and the COVID-19 distribution model in the work area. The model is made with a scope that is limited only to the industrial work environment, not including outside facilities. Contamination to employees may occur when employees return home or are outside the factory. The model also does not adopt the presence of employees who are being treated for COVID-19 healing in a healing facility. In the Shewhart Control Chart model, it is hoped that a control limit can be obtained that can be used to monitor fluctuations in employee health, the diagram will be designed for daily monitoring of workers. Out-of-control data becomes a warning to carry out a reliability test (Capability) and to trace sources of contamination obtained by employees.
Prototype Design Analysis of Digital-Based Wind Tunnel Aerodynamic Testing Equipment Bambang Setiawan; Rasma Rasma
Journal of Applied Sciences and Advanced Technology Vol 5, No 3 (2023): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.5.3.83-90

Abstract

The design of the prototype uses an electric motor / fan that can be adjusted to produce wind gusts in the wind tunnel. Measurement of dynamic pressure, static pressure and (for compressed flow only) temperature rise in the air stream. The direction of airflow around the model can be determined from the tufts of threads attached to the aerodynamic surface. An important Wind Tunnel design is the geometrical similarity of all dimensions of the object must be proportionally scaled, Mach number the ratio between the speed of air and the speed of sound must be identical for the scaled model and the actual object. the method used in the completion of the wind tunnel machine using the design concept of data collection techniques using solidwork. Making a wind tunnel model by determining the length of the test section of 0.50m, the length of the diffuser being 0.8m, the calculation of the contraction length of the contraction being 0.54m and the height of the contraction being 0.60m calculating the length The only gain is 0.096m Energy losses in the Wind tunnel of 0.02373, Energy Losses on the screen of 0.02373, Energy Losses in Contraction of 0.01728, Energy Losses in the test section of 0.05, Energy Losses on the diffuser of 0.04518 The result of the research that the wind using an anemometer is 2.9 m/s with a temperature of 32.4 °C. The style of getting the results of the airfoil test is that the first form has a drag force of 11.61 grams and a left force of 2.61 grams, while for the second form a drag force is obtained. of 11.50 grams and the left force of 2.50 grams. In this wind tunnel the maximum wind speed is 2.9 m/s, the average wind speed in Indonesia is 2.5 – 3 m/s. In the honeycomb, the wind is controlled so that the wind entering the tunnel becomes unidirectional or focused, and then enters the intake contraction, the wind is increased in pressure by reducing the size of the test section, the goal is to maximize the friction between the test object and the wind.
Multinomial Logistic Regression Analysis of Employee Performance in Certification Service Companies Ahmad Tanzil Daulay; Fachrul Alam; Sawarni Hasibuan; Daruki Daruki; Mohamed Mansour
Journal of Applied Sciences and Advanced Technology Vol 5, No 3 (2023): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.5.3.113-118

Abstract

This research was conducted at a service company engaged in the certification sector. The ability to handle a problem related to certification is the main requirement in determining the quality of services provided by the company. This study uses the Multinomial Logistic Regression Method which aims to find out the general description and the factors that affect employee performance in carrying out their daily work. This study uses primary data collected through online survey sheets for North Jakarta branch employees. The results of the study show that the factors that influence employee performance in certification service companies are the competence of the workforce in the form of Bachelor's degree educational background and work experience. For 6 years and employee training, while other factors have no significant effect.
Heating Analysis Of Used Cooking Oil Refining Equipment Using Activated Charcoal With A Heating Element Capacity Of 20 Liters / Process Fahmi Al Diansyah; Anwar Ilmar Ramadhan; Firmansyah Firmansyah; Mohd Amiruddin Fikri
Journal of Applied Sciences and Advanced Technology Vol 5, No 3 (2023): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.5.3.91-98

Abstract

Cooking oil that is used repeatedly is very harmful to health. The use of cooking oil repeatedly and continuously in the frying process will result in a degradation reaction, thereby reducing the quality of the cooking oil. Therefore, the purification of used cooking oil needs to be done with the aim of making use of consumable oil and to reduce the risks that can endanger health if using used oil repeatedly. The purpose of this research is to find out the heat energy produced by the band heater during the refining process of used cooking oil with activated charcoal. Knowing the effect of band heater power on the heating time of used cooking oil in the refining process. Changing the ratio of oil composition to activated charcoal to visual purification results. This research method uses a comparison between testing with numerical simulations using Ansys. Based on research, it is known that the greater the heating power used, the less time it takes to heat the oil up to 100oC, the time needed for the process of refining used cooking oil is the fastest, namely for 2 hours 30 minutes with a composition of 80%: 20% with the heat flux used 5500 W/m2, and which required a longer time of 4 hours 45 minutes with a composition of 60% : 40% with the heat flux used 3500W/m2. Visually, the best purification results were obtained, namely with a composition of 70% used cooking oil and 30% activated charcoal with a yellow-orange color, while visually the poorer results were obtained with a composition of 80% used cooking oil and 20% activated charcoal with a reddish yellow color. Thus the composition ratio between used cooking oil and activated charcoal affects the results of the refining process, where visually the best composition ratio is 70% used cooking oil and 30% activated charcoal with a stirring speed of 120 rpm. The highest percentage of free fatty acid (BA) reduction in this study was 73.05% and the highest percentage of peroxide value (PV) reduction was 56.88%.
Experimental Investigation of Thermal Properties of Ternary Nanofluids in Water-Ethylene Glycol (60:40) Mixture Anwar Ilmar Ramadhan; Wan Hamzah Azmi; Korada Viswanatha Sharma; Efrizon Umar
Journal of Applied Sciences and Advanced Technology Vol 5, No 1 (2022): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.5.1.13-26

Abstract

In recent years, research is directed towards enhancing the thermo-physical properties of single-component nanofluids. Hence, a hybrid or composite nanofluid is developed to improve heat transfer performance. The thermophysical properties of the Al2O3-TiO2-SiO2 nanoparticles suspended in the base of water (W) and ethylene glycol (EG) blends with vol 60:40 or Ternary Nanofluids for various volume concentrations are investigated. The experiments were undertaken for the concentration volume of 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0% of Al2O3-TiO2-SiO2 nanofluids with 30, 40, 50, 60 and 70 °C. Thermal conductivity measurements and dynamic viscosity are carried out at temperatures ranging from 30-70 °C.  The highest thermal conductivity of Ternary nanofluids was obtained at a concentration of 3.0%, and the maximum increase was up to 27.1% higher than the base fluid (EG/W). Ternary nanofluids at a concentration of 0.5% give the lowest effective thermal conductivity of 14.4% at 70°C. Meanwhile, the evidence from the dynamic viscosity of the Ternary nanofluids is influenced by concentration and temperature. Furthermore, Ternary nanofluids behaviour as Newtonian fluid in volume concentration from 0.5-3.0%. The development of a new correlation for thermal conductivity and dynamic viscosity of Ternary nanofluids are precise. In conclusion, the combination of enhancement in thermal conductivity and a dynamic viscosity at a concentration of 3.0% has optimum conditions, which have more advantages for heat transfer than at other concentrations.
Marketing Strategy Training and Preparing Financial Reports for SMEs in Pattani Thailand to Form Superior Human Resources Nuraeni Nuraeni; Hartutik Hartutik; Hasanah Hasanah; M. Irfan Tarmizi; Nor Laila; Adi Mansah
Journal of Applied Sciences and Advanced Technology Vol 5, No 3 (2023): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.5.3.99-104

Abstract

Over the past 10 years, the world economy has been rocked by various unpredictable circumstances, such as the US and China trade wars, the Covid-19 pandemic, to the war between Russia and Ukraine. The International Monetary Fund (IMF) estimates that global economic losses will reach USD 12.5 trillion or IDR 178,750 trillion and will continue to increase until 2024. In this case, MSMEs are considered to be the sector that was most affected by the economic crisis, threatening the business continuity of many actors. because the decline in people's purchasing power will have an impact on decreasing MSME income. On the other hand, in general, internal MSMEs in almost every country have the same weakness, namely business development that still uses traditional methods. The method used in this Community Service is to collect information/data related to MSME actors and conduct training on Marketing and Accounting. MSMEs are given training on HPP calculations, marketing strategies, preparation of financial reports, and financial recording application training. We feel that the training "Compilation of Financial Statements and Marketing Strategies for MSME Pattani Thailand to Form Superior HR" is a program that can provide benefits for them to be able to develop their potential to become Superior HR and the business they run into a thriving and sustainable business.  
Numerical Study of Convective Heat Transfer in Plain Tubes with Tri-hybrid Nanofluids for Turbulent Flow Regime Anwar Ilmar Ramadhan; Wan Hamzah Azmi; Raslan A. Alenezi; Efrizon Umar
Journal of Applied Sciences and Advanced Technology Vol 4, No 2 (2021): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.4.2.63-72

Abstract

The use of increased heat transfer techniques, can improve the thermal performance of the tubes. Computational fluid dynamics studies have been carried out to study the heat transfer characteristics and friction factor of the Al2O3-TiO2-SiO2 nanofluids-ethylene glycol (EG)/water (W) (40:60) flowing in the plain tube. The three-dimensional turbulent k-ε model that can be realized with enhanced use of heat treatment on the wall is used for turbulent flow regime. The overall evaluation of tubular performance-tested is based on thermo-hydrodynamic performance index. The results showed that behavioural differences depend on the selected parameters to compare tri-hybrid nanofluids with the base fluid. In addition, the heat transfer coefficient increases with the increase in volume concentration of nanoparticles at the same Reynolds number. The friction factor of Al2O3-TiO2-SiO2 nanofluids decreased exponentially with an increase of Reynolds number. The conventional correlations that have been used in turbulent flow regimes to predict heat transfer rates and friction factors are Dittus-Boelter and Blasius correlations, for tubes also apply to tri-hybrid nanofluids tested which assume that tri-hybrid nanofluids have a homogeneous fluid behaviour.
Characterization of Pigmented Bacillus Species Isolated from Aquatic Environment Saad Sabah Fakhry; Ahmed Ibrahim Jessim; Manal Abdulateef Hasan
Journal of Applied Sciences and Advanced Technology Vol 4, No 2 (2021): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.4.2.51-62

Abstract

The genus of Bacillus includes several group of genetically and phenotypically different. Some species of spore-forming bacteria are pigmented, although the role of these pigments has not been fully elucidated. This study aimed to isolate a new species of Bacillus species and characterize both pigmented and pigment-producing bacteria product. For this purpose, samples were used water to isolate spore-forming bacteria and verify the presence of pigmentation. All bacteria found pegmatite were characterized at the species level and one of those selected for further studies. The physiological and biochemical analysis carried out revealed that: I) the product is carotenoid pigment, II) its synthesis takes place in stationary phase of growth. These features have allowed for us to assume that the carotenoid is produced under conditions of cellular stress and probably involved in cellular adaptation to some environmental conditions are not optimal for the cell.     
Kepok Banana Peel Extract (Musa Paradisiaca) as Antibacterial and Renewable-Biodegradable Surfactant in Liquid Detergent Putri, Shavyta; Redjeki, Athiek Sri; Nugrahani, Ratri Ariatmi
Journal of Applied Sciences and Advanced Technology Vol 7, No 1 (2024): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.7.1.25-34

Abstract

Kepok banana peel contains tannin as antibacterial activity and saponin acts like a surfactant. Detergent is a cleaning agent commonly used by the community. Banana peel is extracted with ethanol solvent to produce antibacterial activity and can be used as a bioadditive. Knowing the antibacterial activity, the extract requires incubation. Because the nature of saponin is the same as surfactant, banana peel extract can be compared with mes surfactant to make liquid detergent. This study was conducted to identify tannin and saponin in banana peel extract, obtain the best banana peel extract yield with the best solvent concentration and the best incubation time for bacterial inhibition, and the best formulation with the addition of extract to the liquid detergent application. The banana peel extraction process with ethanol uses the Ultrasonic Bath Extraction method. The independent variables in this study were the concentration of extraction solvent (50%, 60%, 70%, 80% and 96%) and the formulation of adding banana peel extract (0%, 5%, 10%, 15% and 20%). The best extraction results were obtained with a solvent concentration of 96% which produced a brown liquid with a strong aroma containing tannins and saponins with the best yield of 11.27% and the best antibacterial activity test with a time of 72 hours, then the extract was made into a liquid detergent formulation as a surfactant and compared with MES surfactant so that the best formulation was obtained in formulation F2 (5% banana peel extract 15% methyl ester sulfonate surfactant) and formulation F3 (10% banana peel extract 10% methyl ester sulfonate surfactant).
Efficiency Analysis of Ripple Mill Capacity 6 Ton/Hours on Maintenance Machine Siregar, Ahdiat Leksi; Zulfiah, Riyansa Devi; Rahardja, Istianto Budhi; Rantawi, Azhar Basyir; Saputera, Hendra
Journal of Applied Sciences and Advanced Technology Vol 6, No 2 (2023): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.6.2.75-82

Abstract

Ripple mill is a machine used to crush palm kernels at the nut kernel station. This research aims to find out how the ripple mill machine works and determine the relationship between machine maintenance carried out on the performance efficiency of the ripple mill. The working principle of a ripple mill is that palm kernels that are fed into the ripple mill will be ground and crushed between the rotor and stator with an engine speed of 1200 rpm. The components contained in the ripple mill are the rotor bar which consists of 40 bars arranged in a circle, the stator bar consists of 18 bars at the front and 18 bars at the back, the v-belt pulley used is of the type B65 and B67 according to the position of the motor, then the flange bearing is used as a position for the shaft on the rotor before connecting to the pulley. Based on the results of research that has been carried out, it was found that the feed entering the ripple mill is 5.6 tons / hour with an installed capacity of 6 tons / hour. The working hours that have been set for the ripple mill are 300 operating hours, after observations it was obtained that it was 320 operating hours with the efficiency results obtained remaining in accordance with the predetermined standards, namely 95% - 99%.

Page 7 of 10 | Total Record : 94

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