Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal Mechanova Jurnal Hukum Adigama
Matthew Sebastian
Unknown Affiliation
Law, Crime, Criminology & Criminal Justice Mechanical Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
EXPERIMENTAL STUDY ON THE INFLUENCE OF RIBLETS ON BUS BODY TOWARDS DRAG COEFFICIENT Matthew Sebastian; Fandi D. Suprianto; Teng Sutrisno
Mechanova Vol 4 (2015): Semester genap 2015-2016
Publisher : Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (813.998 KB)

Abstract

Heavy vehicles such as buses and trucks, generally have a form that is not very aerodynamic, usuallyvery long and boxy. Aerodynamics can be very influential on the use of fuel when the coefficient ofdrag is reduced, the vehicle can be more efficient in their use of fuel because the force that inhibitswill be reduced. One way to reduce this drag force is with riblets. Riblets is a structure shaped like abunch of lined trenches. The results of the study on flat plate showed that with the riblets, up to 10%drag reduction can be achieved with the blade structure compared with only a flat surface under thesame conditions.Methods to validate the experiments were performed using simulation results with experimentalresults from the wind tunnel at a speed of 16-27 m/s. Bus model created by CAD software accordingto its original shape to be tested in the wind tunnel and then compare it with the results of theANSYS Fluent simulation. Riblets geometry studied using ANSYS Fluent simulation and theresults of the Boundary Layer will be observed as the riblets geometry changes. From the research, itis known that the best riblets geometry is 1% of the overall length of the bus and with the applicationof said geometry, 1.46% drag reduction can be obtained, from Cd 0.548 to 0.54. The model with thebest drag reduction uses riblets on the front roof of the bus.
ANALISIS PUTUSAN MAHKAMAH AGUNG NOMOR 99K/TUN/2020 TENTANG SENGKETA TERBITNYA SERTIPIKAT TANAH ANTARA PEMERINTAH PROVINSI DKI JAKARTA MELAWAN PT. BUANA PERMATA HIJAU Matthew Sebastian; Hanafi Tanawijaya
Jurnal Hukum Adigama Vol 4, No 2 (2021): Jurnal Hukum Adigama
Publisher : Fakultas Hukum Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/adigama.v4i2.17773

Abstract

Land is closely related to humans. This creates conflict in society. Especially regarding arable rights whose rules are not yet clear. Often disputes occur between civil society and government officials, especially regarding land used for development in the public interest. The author wants to know what are the legal considerations of the Supreme Court in the decision number 99K/TUN/2020 which strengthens the usufructuary rights number 314/315 belonging to the DKI Jakarta Provincial government, by analyzing the validity of the land certificate belonging to the DKI Jakarta Provincial Government in this case, with the applicable rules. The research method used is normative research. Based on the author's analysis, there are several things that make the judges should not ignore the arable rights of PT Buana Permata Hijau. Some of these things are that the SK on price estimation which is used as the basis for the consignment has expired. Then the consignment made is not in accordance with the applicable regulations. In addition, the handover by PT Agung Podomoro to the DKI Jakarta Provincial Government was not in accordance with the applicable regulations. This is used as the basis for the issuance of a certificate of use rights of the DKI Provincial Government. Therefore, it can be concluded that the certificate of use rights of the DKI Provincial Government is not appropriate to be issued by the National Land Agency because the land is still in a state of dispute.
Co-Authors Fandi D. Suprianto Hanafi Tanawijaya Teng sutrisno