Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal E-JRM International Journal of Mechanical, Industrial and Control Systems Engineering
Hafidzul Ulum
Unknown Affiliation
Computer Science & IT Economics, Econometrics & Finance Engineering

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

Found 2 Documents
Search

 1 
ANALISIS PERBANDINGAN KINERJA KEUANGAN PERUSAHAAN TELEKOMUNIKASI YANG TERCATAT DI BEI (Studi kasus pada PT. Telekomunikasi Indonesia Tbk. dan PT. Indosat Tbk. periode 2006 – 2015) Hafidzul Ulum; Ronny Malavia Mardani; Budi Wahono
E-JRM : Elektronik Jurnal Riset Manajemen e-Jrm Vol. 06 No. 7 Agustus 2017
Publisher : UNIVERSITAS ISLAM MALANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (525.995 KB)

Abstract

ABSTRACTThe increasingly tight business environment requires companies to have goodfinancial performance. Financial performance can be seen from the company'sfinancial statements in the previous period because it can as a reflection ofperformance for the next period with a certain calculation. This study aims todetermine the comparison of financial performance of PT TelekomunikasiIndonesiaTbk and PT Indosat Tbk from 2006 to 2015. The method used in thisstudy is qualitative data in the form of annual financial statements calculatedusing the curent ratio, debt to equity ratio, return on equity, return on Asset, netprofit margin, total asset turnover and economic value added (EVA). The resultsshow that the average value of the curent ratio, debt to equity ratio, return onequity, return on assets, net profit margin, and total asset turnover average valueof PT Telekomunikasi Indonesia Tbk better than PT Indosat Tbk. While theaverage value of economic value added (EVA) of PT Telekomunikasi IndonesiaTbk is better than PT Indosat Tbk.Keywords: Financial Ratios, Economic Value Added, Financial Performance
Design and Simulation of Screw Flow in a Prototype Injection Molding Machine Using Recycled Polypropylene Riswan E. W. Susanto; Ahsin Fahmi M; Hafidzul Ulum; Rima Z. K. Nisak; Salim Subarkah
International Journal of Mechanical, Industrial and Control Systems Engineering Vol. 2 No. 2 (2025): June :IJMICSE: International Journal of Mechanical, Industrial and Control Syst
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijmicse.v2i2.334

Abstract

Plastic waste is currently still a serious problem for society due to the lack of sensitivity to environmental problems and the impact of careless disposal of plastic waste in many places. The injection molding process on industry scale often faces obstacles such as machines that have not worked efficiently, injection capacity that is unable to fill the mold completely, and the emergence of product defects due to plastic flow that begins to freeze before the entire cavity is completely filled. This study aims to design and simulate a prototype injection molding machine with a capacity of 4 tensile test specimens (total volume 28.5 cm³) in order to overcome these problems and to adjust the practicum needs of mechanical engineering students. The design process is carried out with SolidWorks software for 3D design, as well as flow simulation using SolidWorks Plastics and Flow Simulation with recycled Polypropylene (PP) material at melting temperature ± 230 ° C and injection pressure ± 5.3 MPa. The design results in a machine with dimensions of 1273 × 400 × 826 mm equipped with main components in the form of a frame, electric motor and gearbox, hopper, body safety, wheels, piston cylinder, control panel, heater, screw with barrel, and mold. SolidWorks Plastics simulation shows that the plastic flow fills the mold evenly with a filling time of 10.93 seconds, cycle time of 83.94 seconds, and maximum pressure of 5.38 MPa in the gate area, while Flow Simulation simulation shows a spiral flow pattern from the hopper to the end of the mold without backflow, with a mass flow rate of 0.0227 kg/sec and an average pressure of 97.765 Pa. These results prove that the design and simulation can improve process efficiency and mold quality
Co-Authors Ahsin Fahmi M Rima Z. K. Nisak Riswan E. W. Susanto Ronny Malavia Mardani Salim Subarkah