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All Journal G-Tech : Jurnal Teknologi Terapan Jurnal Teknologi dan Manajemen Journal of Community Services in Sustainability
Shalihah, Adinda Rahmah
Unknown Affiliation
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Industrial & Manufacturing Engineering

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Analysis of the Effect of Quay Container Crane Available on Dwelling Time at Jakarta International Container Terminal Gurning, Ridho Hans; Dendra, Feby Gusti; Shalihah, Adinda Rahmah
Jurnal Teknologi dan Manajemen Vol. 22 No. 2 (2024): JURNAL TEKNOLOGI DAN MANAJEMEN (AUGUST)
Publisher : Politeknik STMI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52330/jtm.v22i2.309

Abstract

The efficiency of loading and unloading dwelling time at the port has been done a lot. The problem at PT JICT is that there has been a decrease in throughput for the last three years, this has an effect on operational performance. operational performance is a representation of the achievement of all targets, thus the company always aims to improve its operational performance. Another problem is that the terminal's operational equipment has begun to be obsolete, which hinders the loading and unloading operation time, the lack of operational equipment that supports the loading and unloading process. The operational equipment studied is the Quay Container Crane which is seen from the available condition. All of these problems will have an impact on dwelling time at PT JICT which can affect operational performance. This research is expected to provide recommendations to PT Jakarta International Container Terminal to prepare adequate operational equipment so that the resulting dwelling time is known. This research method uses a dynamic system model and validation test with behavior pattern test. The results of the dynamic system model validation obtained dwelling time between 2.79 - 4.56 days, mean error of 3% and standard deviation error of 11%. Maintenance of quay container cranes has an influence on unloading productivity which has an impact on dwelling time. Based on 60 data, the quay container crane available variable is seen based on quartile values consisting of quartile 1 (Q1), quartile 2 (Q2) and quartile 3 (Q3). In the quay container crane available variable, the dwelling time value in quartile one is 1.34 days, quartile two is 1.47 and quartile three is 1.51 and the dwelling time value in quartile one is 14 units, quartile two is 12 units and quartile three is 10 units.
Sosialisasi K3 Dan 5R Pada Bengkel May Car Bodyworks Gurning, Ridho Hans; Arohman, Abdul Wahid; Shalihah, Adinda Rahmah
Journal of Community Services in Sustainability Vol. 3 No. 1 (2025): Journal of Community Services in Sustainability (April 2025)
Publisher : Politeknik STMI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52330/jocss.v3i1.431

Abstract

Basically, every job will have its own safety hazard risk factors, especially the automotive industry. Automotive industry work practices have Occupational Safety and Health (K3) risks for all workers in the work environment. Potential hazards that will be faced include exposure to chemicals, infections, allergies, electricity and physical such as slipping, falling, being scratched, stabbed, and hit which depend on the type of activity carried out in the area. Seeing aspects of the physical work environment such as the layout of practice equipment, personal protective equipment, work clothes, cleanliness of the room, lighting, irrigation, air conditioning in the work space is very important in creating a safe environment free from the risk of accidents or occupational diseases. This is what drives the Abdimas team to encourage socialization and implementation of K3 and 5R at the May Car Bodyworks Workshop with the aim of increasing efficiency, productivity, and quality in work activities at the Workshop. This activity uses a descriptive qualitative method, where the technique of collecting data information is selected in a specific way, and uses observation methods with interviews and documentation and is analyzed in the application. The results obtained are in the form of a report on the implementation and application of the 5R program in the Workshop and can implement the 5R and K3 culture programs.
Effect of SiO₂ Nanoparticle Dispersion on The Stability and Thermal Conductivity of Polyvinyl Ether-Based Nanolubricant Safril, Safril; Solih, Edwin Sahrial; Gurning, Ridho Hans; Shalihah, Adinda Rahmah; Arohman, Abdul Wahid
G-Tech: Jurnal Teknologi Terapan Vol 10 No 1 (2026): G-Tech, Vol. 10 No. 1 January 2026
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/g-tech.v10i1.8987

Abstract

Heat transfer efficiency in lubrication systems can be achieved by utilising nanolubricants by dispersing nanoparticle additives into pure lubricants to increase nanolubricant stability and thermal conductivity. This study aims to investigate the effect of silicon dioxide (SiO₂) nanoparticle dispersion in polyvinyl ether (PVE)-based lubricants on the stability and thermal conductivity characteristics of nanolubricants. SiO₂/PVE nanolubricant was prepared using a two-step method with a volume concentration of 0.007%. Stability evaluation was carried out through UV–Vis spectrophotometry testing over a period of 30 days. Thermal conductivity was measured using KD2-Pro at a temperature range of 30 ℃ to 80 ℃. The results of the study showed that SiO₂/PVE was declared stable after 144 hours with an absorbance of 80%. Thermal conductivity characteristics decreased with increasing temperature, and the nanolubricant increased compared to PVE lubricants. The maximum increase in thermal conductivity was 2.72% compared to the pure lubricant, and at a test temperature of 30 °C, SiO₂/PVE was compared to SiO₂/corn oil, SiO₂/paraffin oil, SiO₂/sunflower SiO₂/oil, and SiO₂/soybean oil; the results showed an increase in thermal conductivity of 66.69%, 80.63%, 67.70%, and 46.45%, respectively. The thermal conductivity behaviour tends to increase when SiO₂ nanoparticles are dispersed into the pure lubricant, compared to the pure PVE lubricant and previous studies. These findings indicate that SiO₂/PVE nanolubricant produces a significant increase in thermal conductivity, resulting in accelerated heat transfer, reduced friction and wear, and ultimately leading to increased energy efficiency and improved overall system performance.
Co-Authors Abdul Wahid Arohman Feby Gusti Dendra Ridho Hans Gurning Safril Safril Solih, Edwin Sahrial