Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Ambidextrous : Journal of Innovation, Efficiency and Technology in Organization
Zihni Ihkamuddin
Universitas Maritim AMNI Semarang
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Physics

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

Found 2 Documents
Search

 1 
Comparative Analysis of Grab, Conveyor, and Excavator Unloading Equipment on Time Efficiency and Port Costs in Bulk Urea Fertilizer Unloading at Tanjung Emas Port, Semarang Mulki Jasty Amanda; Sutini; Dedy Rusmiyanto; Zihni Ihkamuddin
Ambidextrous Journal of Innovation Efficiency and Technology in Organization Vol. 4 No. 01: Ambidextrous: Journal of Innovation, Efficiency and Technology in Organization 
Publisher : Takaza Innovatix Labs Ltd.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61536/ambidextrous.v4i01.470

Abstract

This study aims to analyze the performance and port cost efficiency of bulk urea fertilizer unloading operations at Tanjung Emas Port, Semarang, by comparing three types of unloading equipment: conveyor, grab, and excavator. Data were collected through direct observation and documentation of operations on MV Soemantri Brodjonegoro (conveyor), MV Pusri Indonesia 1 (grab), and TB Del 02/BG Parta Jaya 3006 (excavator) during March–May 2025. Parameters measured include unloading productivity (MT/hour), effective berthing time, downtime percentage, and total port costs (berthage, pilotage, towage, unloading charges) based on Minister of Transportation Regulation No. PM 10 of 2021. Results show that the conveyor achieved the highest productivity at 109.79 MT/hour, followed by excavator at 104.156 MT/hour and grab at 101.006 MT/hour. The grab recorded the lowest downtime percentage (12%), while conveyor (19%) and excavator (18%) were higher. In terms of port cost, excavator was the most economical (IDR 21,549,045), followed by conveyor (IDR 25,337,476), with grab the highest (IDR 29,874,552). Unloading charges dominated more than 74% of total costs across all three methods. These findings provide strategic guidance in selecting unloading equipment based on operational priorities, whether speed or cost efficiency.
Analisis Sensitivitas Penurunan Konsolidasi Tanah Lunak di Pelabuhan Tanjung Emas Semarang: Studi Parametrik 1D Berbasis Data Sekunder Anisa Diansisti; Zihni Ihkamuddin; Khabib Hidayat Raji; Rizki Bayu Ramadhan
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 2 (2026): May (Inpres)
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i2.1789

Abstract

The Port of Tanjung Emas in Semarang faces geotechnical challenges due to the prevalence of soft marine clay layers. This study employed an analytical-parametric computational method based on secondary data (desk study) synthesized from 15 indexed scientific publications (Scopus, SINTA, Google Scholar) from 2013 to 2024, covering geotechnical investigations at Semarang, Patimban, and Jakarta coastal areas. The analysis technique applied Terzaghi's one-dimensional consolidation equations with one-at-a-time (OAT) sensitivity analysis using the Normalized Sensitivity Index (NSI). All parameters were verified for physical consistency through soil phase relationships. Three scenarios, optimistic, realistic, and pessimistic, were analyzed. Results indicate a primary settlement range of 1.87–5.36 m for normally consolidated (NC) conditions and 1.11–3.83 m for overconsolidated (OC, OCR = 1.5) conditions. The 90% consolidation time without vertical drainage ranges from 9.5 to 88.3 years, while with 1.0 m-spaced Prefabricated Vertical Drain (PVD), it is reduced to 0.8–2.6 months. Estimated secondary compression adds 0.22–0.35 m in the optimistic and realistic scenarios. All scenarios exceed the maximum residual settlement limit of 300 mm per BS 6349 (BSI, 2021) and PIANC (2014) by 6–18 times. This study conclusively demonstrates that no construction scenario at Tanjung Emas Port is feasible without prior ground improvement, and the compression index (Cc) is the single most critical parameter (NSI = 1.00). Field validation is required.
Co-Authors Anisa Diansisti Dedy Rusmiyanto Khabib Hidayat Raji Mulki Jasty Amanda Rizki Bayu Ramadhan Sutini