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All Journal EKONOMIA Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin Mesin Journal of Physical Education and Sports Spektrum Sipil Global Legal Review Jurnal Manajemen DIVERSIFIKASI Asian Journal of Health Research Jurnal Riset Ilmiah
KUSUMA WARDANI
STMIK AMIKOM Yogyakarta
Aerospace Engineering Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Health Professions Immunology & microbiology Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

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Analisis pemakaian bahan bakar biogas termurnikan pada unjuk kerja motor bakar Sutanto, Rudy; Wardani, Kusuma; Mulyanto, Arif; Nurchayati, Nurchayati; Pandiatmi, Pandri; Zainuri, Achmad; Sinarep, Sinarep
Dinamika Teknik Mesin Vol 7, No 1 (2017): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v7i1.1

Abstract

The long term purpose of this research is to obtain the high quality renewable biogas that can be used as fuel for internal combustion engines to drive an electricity generator as energy diversification efforts in the area of small sustainable islands. The specific target expected to be achieved is a method/technique for absorbing impurities contained in biogas, especially CO2 component. The study was conducted to reduce the level of CO2 in biogas using NaOH solution. The mass flow rates of biogas employed were 2, 4, 6, 8 and 10 l/min. The biogas was then tested using an engine to see the effect CO2 on the engine performance at several rotations, i.e. 1500, 2500, 3500, and 4500 rpm. The results show that the torque increases by 21.3% for biogas B2 compared to the unpurified biogas. For biogas B4, the torque increases by 19.1%. While for biogas B6, B8, and B10, the torques increase by 14.9%, 12.8%, and 8.5% respectively. For biogas B2, the SFCE decreases by 33.4%, for biogas B4, the SFCE declines of about 22.7%, while for biogas B6, the SFCE declines by 17.9%. The SFCSs also decline by 13.9% and 8.5% for biogas B8 and B10.
Pengaruh Penggunaan Media Sosial Facebook dan Literasi Kewirausahaan Terhadap Motivasi Berwirausaha Dengan Efikasi Diri Sebagai Variabel Intervening Wardani, Kusuma; japlani, Ardiansyah; Septiana, Nani
Jurnal Manajemen DIVERSIFIKASI Vol. 6 No. 1 (2026): Maret
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/diversifikasi.v6i1.6521

Abstract

Population growth in Indonesia, according to the latest Central Statistics Agency (BPS) data, has now reached 278.69 million people by mid-2023. Based on Trading Economy data, Indonesia is the country with the second highest unemployment rate in Southeast Asia this year. It was recorded that the domestic unemployment rate reached 5.45% in February 2023. Unemployment is a major problem, especially in developing countries like Indonesia with high population growth rates. In fact, the high population growth in Indonesia is not balanced with the growth in employment opportunities or the availability of jobs in society. The method used in this research is quantitative, the data collection technique is through distributing questionnaires. The sample for this research is 76 FEB Muhammadiyah University Metro students, Class of 2020. Data was collected using a questionnaire and data analysis using validity test, reliability test, normality test, linearity test, homogeneity test, multiple linear regression analysis, t test, f test, determinant coefficient test (R2) and using SPSS 26. The results of this study show that There is a positive and significant influence of the use of Facebook social media and entrepreneurial literacy on entrepreneurial motivation. There is a positive and significant influence of the use of Facebook social media and entrepreneurial literacy on self-efficacy. There is a positive and significant influence of the use of Facebook social media and entrepreneurial literacy on entrepreneurial motivation with self-efficacy. as an intervening variable
Co-Authors Achmad Zainuri Ardiansyah Japlani, Ardiansyah Arif Mulyanto Arif Mulyanto, Arif Arin Khairunnisa, Arin Elmenes, Fika Ardyani Fadhilah, Ridho Fakhruddin Fakhruddin Gerawati, Adela Putri Jadid, Badru Nurchayati Nurchayati Pandri Pandiatmi pudholi, Yusup Arya Ramadhan, Bintang Aditya Rizky, Hafiz Rudy Sutanto Rustam, Najla Septiana, Nani Sinarep Sinarep Soekardi, Soekardi Wiyono , Teguh Yahya Irwanto Yusuf, Putri Sinta Nuriah