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All Journal Media Teknik Sipil Jurnal Dedikasi Jurnal Gamma Prosiding Semnastek Journal of Energy, Mechanical, Material and Manufacturing Engineering BERDIKARI : Jurnal Inovasi dan Penerapan Ipteks J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Journal of Community Service and Empowerment JINAV: Journal of Information and Visualization Proceeding Biology Education Conference ARMATUR : Artikel Teknik Mesin dan Manufaktur Jurnal Teknik Mesin Sinergi J-Proteksion : Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin
Ali Mokhtar
Universitas Muhammadiyah Malang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Empowerment of Dermo Youth Organization with design training, welding techniques and OHS towards the development of economic independence of village communities Aisyah, Iis Siti; Mokhtar, Ali; Kurniawati, Dini; Hasanah, Nur
Journal of Community Service and Empowerment Vol. 5 No. 2 (2024): August
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jcse.v5i2.32573

Abstract

Unemployment may cause problems for those who experience it for example depression and cause other social problems including criminal acts such as thuggery. This problem can only be eliminated if the root cause of unemployment is eliminated. Eliminating unemployment must be done comprehensively although every region always has unemployment due to various factors, and it would be wiser if in overcoming the problem of unemployment and its side excesses such as thuggery, the local potential of the region and the communal approach are put forward. Handling of these social problems will be applied in Dermo Hamlet, Dau Subdistrict, where many welding workshops are located, yet there are still many people of productive age who do not have permanent jobs or are unemployed. So that the proposed Science and Technology-Based Community Service program in collaboration with Youth Organization partners in Dermo Hamlet aims to overcome these social problems through organizing design training, welding training and OHS / Occupational Health and Safety socialization. The initial capital constraints in making this business even though it is simple are related to the funding budget that is still not available to buy welding equipment and other supporting tools, besides that it is also constrained related to skills. So that in this PKM, 1 set of welding machines is provided.  And the indicator of program achievement is marked by understanding of the material by giving 10 Basic Welding certificates and 10 OHS certificates from the Mechanical Engineering Study Program.
Evaluating ARIMA Models for Short-Term Rainfall Forecasting in Polewali Mandar Regency Ahmar, Ansari Saleh; Mokhtar, Ali
JINAV: Journal of Information and Visualization Vol. 5 No. 2 (2024)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.jinav3266

Abstract

This study aims to forecast rainfall in Polewali Mandar Regency using the ARIMA model. This is a quantitative study that uses secondary data, specifically monthly rainfall data (in mm) from January 2008 to December 2020, obtained from the NERC EDS Centre for Environmental Data Analysis. Two ARIMA models were tested: ARIMA(0,1,1)(0,1,1)[12] and ARIMA(1,1,1)(0,1,1)[12], with model selection based on the Akaike Information Criterion (AIC), which balances model fit and complexity. The AIC calculation revealed that the ARIMA(1,1,1)(0,1,1)[12] model had a lower AIC value (1677.33) compared to the ARIMA(0,1,1)(0,1,1)[12] model (1678.16), making ARIMA(1,1,1)(0,1,1)[12] the preferred model. Using this model, the forecasted rainfall for the next five months is as follows: January 2021: 279.8745 mm, February 2021: 238.2206 mm, March 2021: 237.1745 mm, April 2021: 349.3206 mm, and May 2021: 336.0976 mm. These forecasts provide valuable information for water resource management, agricultural irrigation planning, and disaster mitigation related to rainfall. The study emphasizes the importance of selecting the appropriate model to improve forecasting accuracy.
Pengaruh Penambahan Catalytic Converter Berbahan Ceramic Cordierite Honeycomb dan Sponge steel terhadap Emisi Gas Buang Kendaraan Rahmandhika, Andinusa; Mokhtar, Ali; Defantyan, Etantyo Daffa; Lutfi, Vicky Thorikhotul
J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Vol. 8 No. 2 (2024): J-Proteksion
Publisher : Universitas Muhammadiyah Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32528/jp.v8i2.1429

Abstract

Peningkatan jumlah kendaraan bermotor mengakibatkan kenaikan polusi udara akibat emisi gas buang. Penelitian ini bertujuan untuk mengkaji penambahan katalisator berbahan keramik cordierite berbentuk sarang lebah dan penambahan spons baja guna menghambat tingginya gas berbahaya yang dilepaskan pada knalpot. Metode yang digunakan dalam penelitian ini adalah metode eksperimental, dimulai dari perancangan converter, pemilihan jenis katalis, hingga proses pembuatan converter berbahan keramik cordierite dan spons baja lebah. Selanjutnya, dilakukan pengujian untuk membandingkan emisi gas buang kendaraan yang menggunakan converter dengan yang tidak menggunakan atau menggunakan knalpot bawaan motor. Parameter yang diukur adalah presentase gas buang CO, CO2, dan HC pada knalpot dengan memvariasikan nilai putaran mesin. Hasil pengujian menunjukkan bahwa penggunaan converter berbahan katalis keramik cordierite dapat menekan peningkatan presentase gas CO, CO2, dan kadar emisi HC yang dilepaskan ke lingkungan pada putaran mesin 1500 – 4500 rpm. Penambahan sponge steel efektif untuk mereduksi gas CO, CO2, dan kadar emisi HC pada putaran mesin rendah, namun tidak maksimal pada rpm tinggi.
Co-Authors Achmad Fauzan Hery Adi Putra, Bagus Ahmar, Ansari Saleh Ali Saifullah Andinusa Rahmandhika Daryono Daryono Defantyan, Etantyo Daffa Dini Kurniawati Heni Hendaryati Iis Siti Aisyah Ilyas Masudin Lud Waluyo Lutfi, Vicky Thorikhotul Machmud Effendy Machmud Effendy Moch Agus Kresno Moch Agus Kresno, Moch Agus Moch. Agus Krisno Budiyanto muhammad irfan Muhammad Irfan Murjito Murjito Nur Hasanah Pringga P, Okta Samin Samin Satworo Adiwidodo Sayid Muhammad Sayid Muhammad, Sayid Sentot Achmadi Sudarman . Sudarman . Sudarman Sudarman Sudarman Sudarman Sujono Sujono Suwignyo . Suwignyo, Suwignyo Yepy Komaril Sofi’i