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All Journal Jurnal Ekonomi Pembangunan JAM : Jurnal Aplikasi Manajemen Bisma The Journal of Counseling Jurnal Teknologi Jurnal Teknik Creative Research Management Journal Jurnal Ekonomi, Bisnis dan Manajemen
Hakim, Rachman
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Religion Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Kajian Keserupaan Parameter Kinerja Miniatur dan Prototipe Turbin Angin Sumbu Horisontal Saefudin, Deny Bayu; Piseno, Wirawan; Hakim, Rachman
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 17 No 2 (2018): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (418.392 KB) | DOI: 10.26874/jt.vol17no2.80

Abstract

Pengujian kinerja turbin angin sumbu horisontal yang berukuran besar dapat disederhanakan dengan prinsip keserupaan. Prinsip tersebut memungkinkan prediksi karakter turbin berukuran besar (prototipe) dapat dilakukan dengan menggunakan model yang berukuran lebih kecil (miniatur). Ukuran miniatur yang cenderung kecil diharapkan dapat memudahkan proses pengujian dan meminimalisir biaya pembuatan spesimen uji. Teori keserupaan dapat digunakan pada kasus aerodinamika dengan syarat kesamaan nilai bilangan Reynolds dan bilangan Mach dari prototipe dan miniatur terpenuhi. Penelitian kali ini membahas keserupaan parameter kinerja prototipe dan miniatur turbin dari hasil simulasi numerik dengan menggunakan teori momentum-elemen bilah yang dilengkapi beberapa faktor koreksi. Hasil ini nantinya digunakan sebagai dasar pengujian kinerja pada penelitian selanjutnya. Pada awal proses simulasi, terdeteksi bahwa kesamaan nilai bilangan Reynolds antara prototipe dan miniatur dapat terjaga. Hal ini dilakukan dengan cara menaikkan nilai kecepatan angin pengujian miniatur secara proporsional sesuai dengan pengecilan dimensi turbin akibat proses penskalaan. Namun, nilai bilangan Mach keduanya terlihat berbeda cukup besar. Tercatat di posisi sekitar 50% hingga 80% panjang bilah, nilai rerata bilangan Mach untuk prototipe sebesar 0,02 dan miniatur sebesar 0,191. Terlihat bahwa nilai bilangan Mach pada prototipe turbin termasuk pada kategori incompressible sedangkan pada miniatur sudah masuk di kategori compressible. Meski begitu, ternyata perbedaan nilai bilangan Mach tersebut tidak memberikan pengaruh yang signifikan terhadap perbedaan karakter kinerja prototipe dan miniatur turbin. Hal ini dapat dilihat dari rerata simpangan koefisien daya sebesar dan koefisien gaya tangensial sebesar 2,3% serta koefisien gaya dorong yang hanya sebesar 1,4%.
FULL-FLEDGED INFLATION TARGETING FRAMEWORK DAN PERSISTENSI INFLASI Hakim, Rachman
Jurnal Ekonomi Pembangunan Vol 13, No 2 (2015): Jurnal Ekonomi Pembangunan
Publisher : Pusat Pengkajian Ekonomi dan Kebijakan Publik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.042 KB) | DOI: 10.22219/jep.v13i2.3896

Abstract

Setting the inflation rate may look simple but certainly not easy. This can be evidenced by frequent melencengnya inflation target has been set by Bank Indonesia. To overcome this, the 2004 Law No. 3 Article 7 were excluded, thus changing the policy framework of inflation targeting lite be a full-fledged inflation targeting. This means that Bank Indonesia will focus on regulating the rate of inflation only. The purpose of this study to determine whether the rate of inflation to be more easily controlled in the period of full-fledged inflation targeting. The method used is the autoregressive model estimation. The results showed that the application of full-fledged inflation targeting has not had a positive impact in regulating the rate of inflation. In the period 2005-2015, was inflation is still very difficult to control or tend to be persistent. Interestingly, this was due to the strong influence of the global economy on the Indonesian econom
Studi Kasus Perhitungan Daya Dan Efisiensi Turbin Air Setelah Overhaul Pada PLTA Kapasitas 175 MW Hakim, Rachman; Hidayat, Wahyu; Biksono, Damawidjaya; Saefudin, Deny Bayu
Jurnal Teknologi Vol. 11 No. 2 (2024): Jurnal Teknologi
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/jtek.v11i2.309

Abstract

Pembangkit Listrik Tenaga Air (PLTA) memanfaatkan sumber energi terbarukan dari air, dengan daya yang berfluktuasi tergantung pada ketersediaan air, tinggi jatuh, dan debit air. Seiring dengan meningkatnya jam operasi, , khususnya pada turbin air. Tujuan dari penelitian ini untuk mengetahui perbedaan performa turbin air sebelum dan setelah dilakukan overhaul. Evaluasi daya dan efisiensi turbin dilakukan pasca pemeliharaan dengan ncari parameter seperti debit (Q), Head (H), dan massa jenis (ρ). Setelah menetapkan daya hidrolis potensial, output turbin dibandingkan dengan standar untuk menilai efisiensinya. Efisiensi turbin PLTA Saguling mencapai sekitar 91,17% sesuai dengan standar Manual Handbook Operation & Maintenance, dengan daya produksi satu unit pembangkit mencapai 174,14 MW menurut Karakteristik Operasi Dikontrak. Setelah pemeliharaan, terjadi peningkatan yang signifikan pada daya dan efisiensi turbin, dari 170 MW menjadi 175 MW, dan dari rata-rata efisiensi 88,49% menjadi 93,64%. Oleh karena itu, pemeliharaan yang terencana dan terstruktur dapat meningkatkan kinerja dan efisiensi PLTA. Keywords: PLTA, daya turbin, efisiensi turbin, peningkatan efisiensi turbin    
PENGARUH FAKTOR SOSIAL DAN EKONOMI TERHADAP PENDAPATAN BUDIDAYA IKAN BANDENG DI KECAMATAN PADEMAWU KABUPATEN PAMEKASAN Hakim, Rachman; Gazali, Gazali; Syaifadi, Febryan
Creative Research Management Journal Vol 6 No 1 (2023): June
Publisher : Universitas Prof. Dr. Hazairin SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/crmj.v6i1.3593

Abstract

Milkfish cultivation has a significant economic impact in Pademawu District. However, milkfish cultivators often encounter many obstacles during the cultivation process to selling it. This study aims to determine the effect of social and economic factors on the income of the milkfish farming community in Pademawu District, Pamekasan Regency. This study uses a quantitative approach. The population in this study were 30 Pademawu people who cultivate milkfish. The data collection technique used was a questionnaire. The data analysis technique used is multiple linear regression analysis. The sampling technique uses a full sample, meaning that the entire study population is used as a sample. The results showed that social and economic factors had a positive effect on the income of the milkfish farming community in Pademawu District, Pamekasan Regency. Social and economic factors also simultaneously influence the income of the milkfish farming community in Pademawu District, Pamekasan Regency. Economic factors have the most dominant influence on the income of the milkfish farming community in Pademawu District, Pamekasan Regency. The practical implication of the results of this research is that milkfish cultivators must understand very well the importance of economic factors, one of which is capital. Farmers need to have sufficient capital so as not to interfere with the process of milkfish cultivation. The local government can also help find solutions related to capital, for example by establishing a cooperative for milkfish cultivators in Pademawu District, Pamekasan Regency.
Pengaruh Inovasi, Diversifikasi, Fleksibilitas, Informasi, dan Kewirausahaan Terhadap Kinerja Usaha Mikro Kecil dan Menengah di Kabupaten Pamekasan Risal, Zef; Gazali, Gazali; Hakim, Rachman; Furqon, Muhammad Amir; Bustaram, Isnain; Kusuma, Adriani; Zainurrafiqi, Zainurrafiqi; Hidayati, Nurul
Masyrif : Jurnal Ekonomi, Bisnis dan Manajemen Vol 5, No 2 (2024): Masyrif : Jurnal Ekonomi, Bisnis dan Manajemen
Publisher : Institut Dirosat Islamiyah Al-Amien Prenduan Sumenep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28944/masyrif.v5i2.1903

Abstract

This study specifically examines the influence of five main internal factors, namely innovation, diversification, error, information, and entrepreneurship, on the performance of Micro, Small and Medium Enterprises (MSMEs) in Pamekasan Regency. This study uses an explanatory quantitative approach with the aim of deeply understanding the influence of each internal factor on MSME performance. The research sample involved 400 MSME actors who were randomly selected from various business sectors in Pamekasan Regency, including trade, services, manufacturing, and other sectors. Data were collected through a questionnaire designed to measure the dimensions of the five independent variables and the MSME performance variable as the dependent variable. Data analysis was carried out using SPSS software to ensure the accuracy and validity of the results obtained. The results of the multiple linear regression analysis showed that each independent variable had a significant influence on MSME performance. Innovation contributes greatly to increasing the competitive advantage of MSMEs through the creation of new, relevant products and services that are in accordance with the needs of the ever-growing market. Diversification was also found to have a significant influence, where MSMEs that have a variety of products or services tend to be more resistant to economic risk and are able to maintain business stability in fluctuating market conditions. Flexibility, as the ability of MSMEs to adapt to changes in the business environment, shows a positive influence on MSME performance, especially in dealing with rapid changes in consumer preferences. Meanwhile, information plays an important role in supporting strategic decision-making, by enabling MSMEs to have access to accurate market data and trends. Finally, entrepreneurship has a significant impact on MSME performance, because the proactive, creative, and innovative attitudes of business actors are able to open up new opportunities and strengthen the position of MSMEs in the market
Psychological Well-being Intervention for Underprivileged Students: Evidence from Rational Emotive Behavior Therapy-Based Group Counseling Hakim, Rachman; Netrawati
Bisma The Journal of Counseling Vol. 8 No. 3 (2024): December
Publisher : Department of Guidance and Counseling, FIP, Undiksha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/bisma.v8i3.86668

Abstract

Students from economically disadvantaged families often face challenges related to low psychological well-being, which can negatively impact their emotional welfare and social functioning. This study aims to analyze the effectiveness of group counseling based on Rational Emotive Behavior Therapy (REBT) in enhancing the psychological well-being of students from underprivileged families. The research adopts a quantitative method with a quasi-experimental design. The sample consists of 20 students with low psychological well-being, divided into an experimental group (10 students) and a control group (10 students). Data were collected using data collection methods in the form of questionnaires with instruments in the form of questionnaire sheets.The sampling technique applied was purposive random sampling, and data were analyzed using the Wilcoxon Signed Rank Test. The findings reveal that group counseling with the REBT approach effectively improves students' psychological well-being. This effectiveness is evidenced by a significantly greater increase in psychological well-being scores in the experimental group compared to the control group. This study concludes that group counseling based on the REBT approach is an effective intervention strategy to enhance the psychological well-being of students from economically disadvantaged families.
Enhancing Business Sustainability Through Organizational Resilience and Green Supply Chain Integration: A Mixed-Methods Approach Zainurrafiqi; Gazali; Hakim, Rachman; Risal, Zef; Retnoningsih, Dwi; Pipatrapa, Anirut; Pawar, Avinash; Effiyaldi
Jurnal Aplikasi Manajemen Vol. 23 No. 2 (2025)
Publisher : Universitas Brawijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

In a rapidly evolving business environment, firms are increasingly challenged to adapt and innovate to maintain competitiveness. Green supply chain integration has emerged as a strategic approach for firms to align operational processes with sustainability objectives. At the same time, organizational resilience is recognized as a critical capability for navigating environmental and market disruptions. Despite the growing importance of these factors, studies exploring their combined impact on sustainable business performance remain limited. Grounded in dynamic capabilities theory, this study investigates the roles of green competitive advantage and organizational resilience in fostering sustainable performance through an explanatory sequential mixed-methods design. Initially, a quantitative survey involving 450 SME managers in Madura was conducted to empirically test the research model using structural equation modeling (SEM). Subsequently, qualitative interviews with selected managers provided nuanced insights into the mechanisms underpinning these relationships. Findings affirm that green supply chain integration and organizational resilience significantly enhance sustainable business performance, with green competitive advantage serving as a key intermediary that strengthens this relationship. This study demonstrates that embedding green supply chain practices directly into core business strategies improves SMEs' adaptability to environmental changes and increases operational efficiency, providing measurable competitive advantages in dynamic market environments.
Co-Authors Bustaram, Isnain Damawidjaya Biksono Dwi Retnoningsih Effiyaldi Furqon, Muhammad Amir Gazali Gazali Gazali Kusuma, Adriani Netrawati, Netrawati Nurul Hidayati Pawar, Avinash Pipatrapa, Anirut Piseno, Wirawan Risal, Zef Saefudin, Deny Bayu Syaifadi, Febryan Wahyu Hidayat Zainurrafiqi Zainurrafiqi Zainurrafiqi