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All Journal Jurnal Energi Dan Manufaktur JOURNAL ONLINE OF PHYSICS Jurnal Manajemen Bisnis dan Kewirausahaan Jurnal Manajemen International Journal of Marine Engineering Innovation and Research
Yanuar Yanuar
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Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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Drag Reduction Suspensi Bakteri Selulosa pada Aliran Crude Oil dalam Pipa Spiral Yanuar Yanuar; Kurniawan Kurniawan; Rendi Rendi; Habib Habib; Edwin Edwin; Vaul Vaul
Jurnal Energi Dan Manufaktur Vol 8 No 1 (2015): April 2015
Publisher : Department of Mechanical Engineering, University of Udayana

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

Abstract

Pressure drop adalah salah satu aspek penting yang mempengaruhi konsumsi energi yangdigunakan dalam suatu transportasi fluida menggunakan pipa. Drag Reduction Agent (DRA)merupakan salah satu alternatif untuk mengurangi timbulnya pressure drop pada aliran fluidadalam pipa dengan menambahkan sejumlah zat aditif kedalam aliran. Zat aditif yang digunakandalam penelitian ini berupa fiber bakteri selulosa. Penelitian ini bertujuan untuk mengetahuikarekteristik drag reduction dalam aliran minyak mentah (crude oil) dalam pipa spiral denganrasio P/Di 7.6. Re= 10^3 - 5.10^4. Dalam penelitian ini juga digunakan pipa bulat dengandiameter 17 mm sebagai pembanding. Penambahan bakteri selulosa dengan konsentrasi 250ppm, 500 ppm, dan 750 ppm pada aliran crude oil dapat mengurangi drag pada pipa spiralataupun pipa bulat. Drag reduction pada pipa bulat sebesar 15 % dan pada pipa spiral 13 %.Kata kunci : Pressure drop, bakteri selulosa, crude oil, pipa spiral.Pressure drop is one of the important aspects that influence the energy consumption used in atransport fluid using a pipe. Drag Reduction Agent (DRA) is one alternative to reduce theoccurence of pressure drop in the fluid flow in a pipe by adding additives into the flow. Additivesused in this study is bacterial cellulose fiber suspension. This study aims to determine thecharacteristics of drag reduction in the flow of crude oil in a spiral pipe with the ratio P/Di 7.6.Reynolds number was 10^3 - 5.10^4. In this study also used a circular pipe with a diameter of17 mm for comparison. The addition of bacterial cellulose with a concentration of 250 ppm, 500ppm, and 750 ppm in the crude oil flow to reduce drag in spiral pipe or circular. From thisresearch, the drag reduction on circular pipe by 15% and 13% in the spiral pipe.Keywords : Pressure drop, bacterial cellulose, crude oil, spiral pipe
Development Of Indonesia Submarine Force Structure Based On Analytical Hierarchy Process (AHP) And Interpretive Structural Modeling (ISM) To Control National Interest At Sea Mei Edi Prayitno; Yanuar Yanuar
International Journal of Marine Engineering Innovation and Research Vol 5, No 3 (2020)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2143.096 KB) | DOI: 10.12962/j25481479.v5i3.7186

Abstract

As a maritime country, Indonesia is rich in natural resources, resulting in theft and territorial violations, so it needs to increase sea power, including submarines. Currently, Indonesia is developing submarines, so it is necessary to choose the best alternatives and elements to control national interests at sea. The research objectives are to find out the best alternative, the key element in developing submarine force structure, and the implications for national interests at sea. The research method is carried out by conducting a literature study to compile a questionnaire and consulting with experts to determine the best variables and sub-elements and followed by a survey of participants as a purposive random sampling using the analytical hierarchy process and interpretive structural modeling. From the research results, the five highest alternative variables are vision and mission (0.102), shipyard (0.90), government policy (0.84), technology transfer (0.56), and budget (0.53). Whereas the key sub-elements of development of submarine force structure are improving the quality of education, the need for the government's political will, national interests, national defense policy, and the role of the defense ministry. By increasing the submarine force structure will be able to maintain the national interest in the sea in protecting natural resources and prevent territorial violations.
Analisa Pengaruh Perubahan Fed Fund Rate, Index Harga Saham Gabungan dan Indeks LQ45 Terhadap Nilai Tukar Dollar Amerika – Rupiah Ricky Suanto; Yanuar Yanuar
Jurnal Manajemen Bisnis dan Kewirausahaan Vol 4, No 3 (2020): Jurnal Manajemen Bisnis dan Kewirausahaan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmbk.v4i3.7909

Abstract

The economy in Indonesia is experiencing a decline which can be seen from the decline in the Composite Stock Price Index in Indonesia. The decline in the value of the Composite Stock Price Index and Liquid 45 Index (LQ45) affected the rupiah exchange rate against US dollars that have passed the psychological level limit of Rp. 15,000 per 1 USD. The weakening of the rupiah and the index value of the stock was triggered by an increase in interest rates set by the Federal which increase Fed Fund Rate to 2.25% in September 2018.This study aims to explain whether it is true that the announcement of changes in the central bank's fed funds rate in the United States can be related and influence the Stock Price Index and Exchange Rates in other countries, especially in Indonesia.After collecting and processing data with Path Analysis, the results show that the impact in average of the fed fund rate to the average return LQ45 index has the strongest effect compared to other variables, then the strongest effect value is produced by the effect of average return Composite Stock Price Index to the average return of the US Dollar - Rupiah which is negative 0.76. After going through the mediation process, the indirect effect that occurs between the average fed fund rate on the average return of the US Dollar – Rupiah is positive 0.451, which significantly stagnant and changes the direction of the effect compared to its direct effect of negative 0.46.
Pengaruh Hubungan Antara Profitabilitas, Pertumbuhan Penjualan, dan Struktur Aset Terhadap Struktur Modal Christian Christian; Yanuar Yanuar
Jurnal Manajemen Bisnis dan Kewirausahaan Vol 4, No 2 (2020): Jurnal Manajemen Bisnis dan Kewirausahaan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmbk.v4i2.7525

Abstract

The purpose of this study is to obtain empirical evidence about the effect of profitability, sales growth, and asset structure on firm capital structure in manufacturing companies listed at Indonesian Stock Exchange during the years 2011-2018. This study uses purposive sampling method to collect data and consists of 11 manufacturing companies listed at Indonesian Stock Exchange during the years 2011-2018. The hypothesis was tested by using multiple linear regression. The results of this study show that profitability has negative significant influence on firm capital structure, sales growth have negative significant influence on firm capital structure, asset structure have negative significant influence on firm capital structure, and also fluctuating exchange rate strengthen the relationship between profitability and firm capital structure.
Pengaruh Peraturan Bank Indonesia Tentang Kredit UMKM Terhadap Total Kredit, Rasio Kredit Umkm, Risiko, Efisiensi dan Profitabilitas Bank Pembangunan Daerah Bagus Santosa; Yanuar Yanuar
Jurnal Manajemen Bisnis dan Kewirausahaan Vol 4, No 2 (2020): Jurnal Manajemen Bisnis dan Kewirausahaan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmbk.v4i2.7522

Abstract

This research aims to analyze the effect of Bank of Indonesia Regulation on Micro, Small, and Medium Enterprises (MSME) loans towards the Loan Disbursed, MSME Loan Ratio, Risk, Efficiency, and Profitability of Regional Development Banks.  This research analyzes the financial data from 10 BPDs over 10 years period to understand the Loan Disbursed, MSME Loan Ratio, Risk, Efficiency, and Profitability of the BPDs before and after the implementation of Regulation Number 14/22/PBI/2012. The financial data were analyzed using the Paired-Sample t-test. Findings show that the overall loan disbursed by BPDs in the period of 2013-2017 or after the Regulation on MSME loans was implemented, is higher than that in the period of 2008-2012 or before the regulation was implemented. However, while the regulation aims to increase the MSME loan disbursed by the banks, the MSME Loan Ratio in the period of 2013-2017 was lower than that in the period of 2008-2012. The Risk, measured by Non-Performing Loan, in the period of 2013-2017 was also increased. The regulation also affects the profitability of the BPDs negatively. The Efficiency, measured by Operating Expenses Operating Income, was not significantly affected by the regulation. The results may inform the regulators to assist the BPDs in responding to the regulation so it could affect BPDs in a more positive way. This may also inform the banks on their financial conditions so they can plan for strategic approaches and develop appropriate schemes on disbursing MSME loans.
Faktor-Faktor yang Memengaruhi Profitabilitas Bank Umum Syariah di Indonesia Eliza Christabella Phuanerys; Yanuar Yanuar
Jurnal Manajemen Bisnis dan Kewirausahaan Vol 4, No 3 (2020): Jurnal Manajemen Bisnis dan Kewirausahaan
Publisher : Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmbk.v4i3.7908

Abstract

This study was conducted to analyze the effect of the Capital Adequacy, Asset Quality, Management Efficiency and Liquidity Management ratios on profitability proxied by bank Return On Assets (ROA), by analyzing the annual financial statements that have been published in 2013-2017. The variables used in analyzing the financial statements of Sharia Commercial Banks that are sampled are Asset Quality which is proxied by Non Performing Financing (NPF), Liquidity Management which is proxied by Financing to Debt Ratio (FDR), Management Efficiency proxied by Net Operating Margin (NOM), and Capital Adequacy proxied by Capital Adequacy Ratio (CAR). The sample in this study was 11 Islamic commercial banks for 5 years, namely 2013-2017. The results showed that Capital Adequacy, Asset Quality, and Liquidity Management significantly influenced the profitability of Islamic commercial banks. Whereas Management Efficiency does not affect the profitability of Islamic commercial banks. Based on these results, Sharia Commercial Banks in Indonesia must increase capital, reduce problematic financing by improving internal processes, and increase bank liquidity by increasing fundraising.
Transformasi Masyarakat Miskin Menjadi Entrepneur Melalui Kolaborasi Yanuar Yanuar
Jurnal Manajemen Vol. 15 No. 1 (2011): February 2011
Publisher : Fakultas Ekonomi dan Bisnis, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jm.v15i1.407

Abstract

The poverty is one of the critical problems that a nation has because it will decrease the citizen living such as bad condition of their health, lack of nutrition, low level of ecucation, les productivity which affects on the national productivity.
DETEKSI KADAR ETANOL PADA MAKANAN TRADISIONAL LEMANG TAPAI MENGGUNAKAN MIKROBIAL BIOSENSOR Nadratul Hanifah; Rahmondia Nanda Setiadi; Yanuar Yanuar; Vira Annisa Rosandi; Lazuardi Umar
JOURNAL ONLINE OF PHYSICS Vol. 8 No. 3 (2023): JOP (Journal Online of Physics) Vol 8 No 3
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v8i3.27517

Abstract

Konsumsi etanol memiliki konsekuensi bagi kesehatan, dimana penentuan etanol sangat relevan dengan uji toksikologi klinis yang mempengaruhi sistem saraf, sistem peredaran darah, sistem pencernaan sehingga perlu dideteksi. Biosensor amperometris merupakan alternatif untuk deteksi etanol dalam makanan yang diamati melalui nilai tegangan output, diperoleh dari oksigen terlarut yang tertinggal dari hasil metabolisme sel. Pada penelitian ini dilakukan deteksi etanol secara kuantitatif memanfaatkan biosensor berbasis sel ragi Saccharomyces cerevisiae untuk mengetahui kadar etanol yang terdapat pada makanan tradisional Lemang Tapai dengan nilai <5%. Larutan etanol standar dengan konsentrasi 1.2%, 2.43%, 3.64% dan 4.86% v/v sebagai kalibrasi sensor yang menunjukkan korelasi (r) yang baik yaitu 0.9937. Hasil pengukuran Lemang Tapai yang dideteksi oleh biosensor menunjukkan konsentrasi etanol 2.79%. Pengolahan data konsentrasi yang dihasilkan kemudian diuji menggunakan metode statistik Analysis of Variance (ANOVA) untuk mengetahui signifikansi perbedaan data yang dihasilkan untuk tiap konsentrasi etanol yang diuji. Hasil penelitian ini diharapkan dapat meningkatkan kesadaran dan kewaspadaan masyarakat terhadap adanya etanol dalam makanan tradisional yang berbahaya ketika dikosumsi secara berlebih.
Co-Authors Bagus Santosa Christian Christian Edwin Edwin Habib Habib Kurniawan Kurniawan Lazuardi Umar Mei Edi Prayitno Nadratul Hanifah Phuanerys, Eliza Christabella Rahmondia N. Setiadi Rendi Rendi Ricky Suanto Vaul Vaul Vira Annisa Rosandi