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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Wave: Jurnal Ilmiah Teknologi Maritim Makara Journal of Technology Journal Online Manajemen ELPEI (JOMEL)
Andi Jamaluddin
Senior Researcher, Indonesian Hydrodynamics Laboratory, Surabaya 60111, presently PhD Student at the Faculty of Marine Technology, ITS, Surabaya 60111, Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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 1 
Wave Pattern dan Interaksi Hambatan Gelombang pada Kapal Lambung Ganda (Twin Hull): Kajian Analisa Numerik Jamaluddin, Andi
Wave: Jurnal Ilmiah Teknologi Maritim Vol 4, No 1 (2010)
Publisher : Wave: Jurnal Ilmiah Teknologi Maritim

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.685 KB) | DOI: 10.29122/jurnalwave.v4i1.3541

Abstract

Pola gelombang yang ditimbulkan oleh lambung kapal yang melaju sangat penting ketika mempertimbangkan kualitas desain lambung dan prediksi hambatan. Makalah ini membahas kajian pola gelombang sekitar monohull (demihull) dan lambung ganda (catamaran) dengan jarak lambung bervariasi. Estimasi numerik hambatan dan interaksi gelombang kapal yang dihasilkan dilakukan dengan menerapkan teknik-teknik numerik untuk menghitung pola gelombang timbul dan hambatannya, dengan permukaan air tenang. Hasil perhitungan numerik untuk kedua demihull dan catamaran dibandingkan dan dibahas secara rinci.Keywords : Twin hull, Wave pattern, Resistance, Simulation
KAJIAN EKSPERIMENTAL DISAIN KAPAL SEP-HULL SEBAGAI SARANA TRANSPORTASI DI PERAIRAN PANTAI DAN SUNGAI Jamaluddin, Andi; Ma’ruf, Buana
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 7, No 3 (2010): Oktober
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (431.32 KB) | DOI: 10.14710/kpl.v7i3.3784

Abstract

Makalah ini membahas pengujian hambatan model kapal Surface Effect Planning Hull (SEP-Hull). Model uji menggunakan sistem pelumasan udara di bawah permukaan lambung kapal untuk mengetahui pengaruh sistem pelumasan terhadap gaya hambatan kapal. Model ini terbuat dari bahan fiberglass dan diuji pada kecepatan, Fn 0.1-1.45, di towing tank- UPT Balai Pengkajian dan Penelitian Hidrodinamika BPPT, Surabaya. Gaya hambatan model kapal diukur dengan alat ukur ‘load cell transducer’. Hasil pengujian model dipresentasikan dalam bentuk grafik dan tabel. Dari hasil uji diperoleh bahwa hambatan total kapal berkurang hingga 30 persen dengan mengaplikasikan sistim pelumasan udara di bawah permukaan lambung kapal. Hasil ini memberikan harapan yang menjanjikan dalam dunia perkapalan.
Kajian Interferensi Koefisien Hambatan pada Lambung Katamaran melalui Komputasi ’Slender Body Method Jamaluddin, Andi; Utama, I Ketut Aria Pria; Hamdani, M.Arief
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 7, No 2 (2010): Juni
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (604.668 KB) | DOI: 10.14710/kpl.v7i2.3772

Abstract

The past decade has witnessed a rapid growth of interest in the development of fast catamaran for various applications. The paper describes the study of interference resistance components on demihull separation. Catamarans or twin-hull vessels may be formed either by connecting two symmetrical demihulls or by splitting a mono hull into two halves to form two asymmetric demihulls. The slender body method in HullSpeed- Maxsurf Program was used for predicting the resistance components. The method assumes that the ship’s beam is small compared to its length. Effect of resistance interference components on catamaran hull separations are explained and discussed with some work from other published data, which shows good agreement.
WAVE PATTERN DAN INTERAKSI HAMBATAN GELOMBANG PADA KAPAL LAMBUNG GANDA (TWIN HULL): KAJIAN ANALISA NUMERIK Jamaluddin, Andi
Wave: Jurnal Ilmiah Teknologi Maritim Vol 4, No 1 (2010)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (421.685 KB) | DOI: 10.29122/jurnalwave.v4i1.3541

Abstract

Pola gelombang yang ditimbulkan oleh lambung kapal yang melaju sangat penting ketika mempertimbangkan kualitas desain lambung dan prediksi hambatan. Makalah ini membahas kajian pola gelombang sekitar monohull (demihull) dan lambung ganda (catamaran) dengan jarak lambung bervariasi. Estimasi numerik hambatan dan interaksi gelombang kapal yang dihasilkan dilakukan dengan menerapkan teknik-teknik numerik untuk menghitung pola gelombang timbul dan hambatannya, dengan permukaan air tenang. Hasil perhitungan numerik untuk kedua demihull dan catamaran dibandingkan dan dibahas secara rinci.Keywords : Twin hull, Wave pattern, Resistance, Simulation
An Investigation Into the Resistance/Powering and Seakeeping Characteristics of River Catamaran and Trimarana Murdijanto, Murdijanto; Utama, I Ketut Aria Pria; Jamaluddin, Andi
Makara Journal of Technology Vol. 15, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The increase of fuel price has caused fleet operational and shipping business to be in danger situation. The fuel consumption of a ship is influenced by ship volume or wetted area which contributes directly to the increase of ship resistance and the size of main engine. In order to find out the appropriate answers, a series of investigation into river transportation using monohull, catamaran and trimaran types of vessel was carried out. The work focused on the estimation of total resistance and powering as well as seakeeping characteristics and carried out experimentally using tank test and numerically using a ship design software (Maxsurf). It was found out that the catamaran and trimaran could have less resistance and hence power compared to monohull of similar displacement. The seakeeping characteristics of the multihull vessels were also comparable with those of the monohull. This is a good indication that river catamaran/trimaran is an efficient and comfortable vessel. If a prototype or real vessel is developed, it can be a very efficient ship as well as a ship with high safety standard.
Pengaruh Earning Per Share (EPS) Dan Debt To Equity Ratio (DER) Terhadap Harga Saham Pada PT Bayu Buana, Tbk. Jamaluddin, Andi; Hariyanti; Alvia, Karmila
Jurnal Online Manajemen ELPEI Vol 4 No 2 (2024)
Publisher : STIM-LPI Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58191/jomel.v4i2.288

Abstract

The purpose of this research is to determine the effect of Earning Per Share and Debt to Equity Ratio on share prices at PT. Bayu Buana, Tbk. The type of data used in this research is qualitative and quantitative. The data source used in this research is secondary data. The analytical method used is multiple linear regression analysis, coefficient of determination, correlation coefficient, t test, and F test. The results of this study show the regression equation Y=9.139+0.176X1– 0.035X2, coefficient of determination, (R2) = 73% and coefficient correlation (R) = 0.858. through the F test, it is obtained that Fcount = 11.182 > Ftable 4.46, the results of this research show that simultaneously Earning Per Share and Debt to Equity Ratio have a significant effect on share prices at PT. Bayu Buana, Tbk. thus the hypothesis is accepted. Based on the t test b1 tcount = 2.444 > ttable = 1.860, the results of this study indicate that Earning Per Share (X1) partially has a positive and significant effect on share prices so that the hypothesis is accepted. Meanwhile, for b2 tcount = -5,000 < ttable = 1.860, the results of this study show that the Debt to Equity Ratio (X2) partially has a negative and significant effect on stock prices so that the hypothesis is accepted.
Pengaruh Net Profit Margin Dan Total Asset Turnover Terhadap Harga Saham pada PT. AKR corporindo, Tbk Jamaluddin, Andi; Alam, Andi Rifqah Purnama; Azizah, Amplya Ayu
Jurnal Online Manajemen ELPEI Vol 5 No 1 (2025)
Publisher : STIM-LPI Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58191/jomel.v5i1.350

Abstract

This research aims The aim of this research is to determine the influence of Net Profit Margin and Total Asset Turnover on share prices at PT. AKR Corporindo, Tbk. The types of data used in this research are qualitative data and quantitative data. The data source used in this research is secondary data. The analytical method used in this research is multiple linear regression. From the research results, the results of the multiple linear regression equation were obtained with the equation value Y = - 3281.28 + 147.59X1 + 4783.54X2, the coefficient of determination (R2) was 0.54 and the correlation coefficient (r) was 0.73. Thus, it can be concluded that simultaneously the variables Net Profit Margin and Total Asset Turnover do not have a significant effect on share prices at PT. ACR. Corporindo, Tbk. Partially, the Net Profit Margin variable has no significant effect on share prices at PT. AKR. Corporindo, Tbk and partially the Total Asset Turnover variable have a significant effect on share prices at PT. ACR. Corporindo, Tbk. Thus, the first and second hypotheses are rejected and the third hypothesis is accepted.
Co-Authors Alam, Andi Rifqah Purnama Alvia, Karmila Azizah, Amplya Ayu Buana Ma’ruf HARIYANTI I Ketut Aria Pria Utama I Ketut Utama, I Ketut M.Arief Hamdani Murdijanto Murdijanto