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All Journal Jurnal Pendidikan Usia Dini Jurisprudentie Jurnal EMT KITA al-Afkar, Journal For Islamic Studies Indonesian Mining Journal Pendas : Jurnah Ilmiah Pendidikan Dasar Jurnal Pembangunan Berkelanjutan JSAI (Journal Scientific and Applied Informatics) Infotekmesin Santhet: (Jurnal Sejarah, Pendidikan Dan Humaniora) G-Couns: Jurnal Bimbingan dan Konseling The Art of Teaching English as a Foreign Language (TATEFL) PUCUK REBUNG: Jurnal Pengabdian kepada Masyarakat Nursing and Health Sciences Journal (NHSJ) Majalah Keadilan JEMSI (Jurnal Ekonomi, Manajemen, dan Akuntansi) Ad-DA’WAH: Dakwah dan Komunikasi Islam Gudang Jurnal Multidisiplin Ilmu AMMA : Jurnal Pengabdian Masyarakat Banda Historia: Jurnal Pendidikan Sejarah dan Studi Budaya JURNAL RUANG HUKUM Jurnal Peweka Tadulako Al-Musthafa: Jurnal Kependidikan dan Keilmuan Berbasis Islam Indonesian Mining Journal AT-TAKLIM: Jurnal Pendidikan Multidisiplin Advance Sustainable Science, Engineering and Technology (ASSET) El-Hikmah Jurnal Ilmu Dakwah dan Komunikasi Jurnal Keilmuan dan Aplikasi Teknologi Industri
Syarifudin
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Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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A Review of Factors Affecting the Mechanical Performance of PLA in FDM 3D Printing Saefudin, Slamet; Samsudi Raharjo; Ilham Yustar Afif; Syarifudin; Purnomo; Muhammad Omar Rusydi; Kuzmin Anton; Muhammad Subri; M. Edi Pujianto
Advance Sustainable Science Engineering and Technology Vol. 7 No. 2 (2025): February-April
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/chs1gc62

Abstract

3D printing has rapidly evolved due to its significant advantages in rapid prototyping. 3D-printed products for industrial applications require stable mechanical properties, which are influenced by various factors. The lack of a comprehensive discussion addressing the factors affecting mechanical properties is the main reason for this review. This article aims to provide an overview of Fused Deposition Modeling (FDM) 3D printing concerning the factors that influence the mechanical performance of FDM 3D products using polylactic acid (PLA) material. The article covers the impact of material factors, process parameters (such as layer thickness, infill patterns, print orientation, infill patterns, infill density, infill width, temperature, and printing speed), as well as post-processing treatments as key considerations. The contribution of this article is to explain to researchers and industry practitioners the factors that affect the mechanical performance of FDM 3D printed products. 
The influence of e-leaflet media in improving the skills of toddler Posyandu cadres Syarifudin; Oktia Woro Kasmini Handayani; Chatila Maharani
Nursing and Health Sciences Journal (NHSJ) Vol. 5 No. 3 (2025): September 2025
Publisher : KHD-Production

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53713/nhsj.v5i3.549

Abstract

Primary health service transformation implementation focuses on a lifecycle approach with promotive and preventive efforts and brings health services closer to cadres through Posyandu. Good integration of Primary Services requires efforts to improve the skills of posyandu cadres through E-Leaflet media. This study aims to determine the influence of e-leaflet media on improving toddler posyandu cadres' skills. This study used a quasi-experimental design with a one-size-fits-all posttest without a control group. The sample amounted to 43 posyandu cadres. The sampling technique is simple random sampling—data analysis with the Wilcoxon test. The p-value on the respondents' skills before and after being given the e-leaflet media was (p=0.001). There was a significant increase in skills after being given the e-leaflet media to the cadres of the Posyandu for toddlers. This statistically significant outcome confirms the efficacy of digital learning resources in strengthening frontline community health worker capabilities.
PENILAIAN TEKNIS DAN EKONOMIS KUALITAS PENGELOLAAN LINGKUNGAN STOCKPILE BATUBARA UNTUK LINGKUNGAN BERKELANJUTAN Juniah, Restu; Ambarita, Novitasari; Syarifudin; Zakir, Syaifudin; Rahmi, Hisni; Amanda, Ridho Rizky
Indonesian Mining Journal Vol 28 No 1 (2025): Indoneisan Mining Journal, April 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No1.2025.1595

Abstract

Coal mining has positive impacts in the form of increasing the national economy and people's income. However, it also has negative impacts, including the decrease of environmental quality such as air, soil, and noise, as well as the potential for spontaneous combustion. The research was conducted to assess the technical and economic aspects of environmental management at coal stockpiles in the Tarahan Port Unit of PT Bukit Asam Tbk to support environmental sustainability. The technical assessment of stockpile environmental management was carried out by comparing observation results with the Environmental Management and Monitoring Plan Document (RKL/RPL) and Indonesia’s applicable Environmental Quality Standards. The economic assessment focused on the cost of environmental monitoring and management by observing the discrepancies between the planned and realization in the first and second quarters. The technical assessment results show that environmental management at the stockpile has been implemented effectively. Air quality parameters and noise levels remain below the established standards, soil quality is classified good as indicated by vegetation growth, and no spontaneous combustion occurred during the observation period. The economic assessment revealed a discrepancy of 2.02% between the planned cost of IDR 121,183,548 to the actual realization of IDR 123,641,668. This increase was attributed to the construction of a dust reduction system and an operational chimney for the 2X8 MW Steam Power Plant, through the use of Electrostatic Precipitators. The study recommends a detailed inventory of environmental cost plans and potential cost escalation to anticipate risk factors. It also highlights the need for regular maintenance of machines that are known to frequently produce emissions. These efforts are expected to reduce the emissions and lower the costs of environmental management and monitoring.
PENILAIAN TEKNIS DAN EKONOMIS KUALITAS PENGELOLAAN LINGKUNGAN STOCKPILE BATUBARA UNTUK LINGKUNGAN BERKELANJUTAN Juniah, Restu; Ambarita, Novitasari; Syarifudin; Zakir, Syaifudin; Rahmi, Hisni; Amanda, Ridho Rizky
Indonesian Mining Journal Vol 28 No 1 (2025): Indoneisan Mining Journal, April 2025
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol28.No1.2025.1595

Abstract

Coal mining has positive impacts in the form of increasing the national economy and people's income. However, it also has negative impacts, including the decrease of environmental quality such as air, soil, and noise, as well as the potential for spontaneous combustion. The research was conducted to assess the technical and economic aspects of environmental management at coal stockpiles in the Tarahan Port Unit of PT Bukit Asam Tbk to support environmental sustainability. The technical assessment of stockpile environmental management was carried out by comparing observation results with the Environmental Management and Monitoring Plan Document (RKL/RPL) and Indonesia’s applicable Environmental Quality Standards. The economic assessment focused on the cost of environmental monitoring and management by observing the discrepancies between the planned and realization in the first and second quarters. The technical assessment results show that environmental management at the stockpile has been implemented effectively. Air quality parameters and noise levels remain below the established standards, soil quality is classified good as indicated by vegetation growth, and no spontaneous combustion occurred during the observation period. The economic assessment revealed a discrepancy of 2.02% between the planned cost of IDR 121,183,548 to the actual realization of IDR 123,641,668. This increase was attributed to the construction of a dust reduction system and an operational chimney for the 2X8 MW Steam Power Plant, through the use of Electrostatic Precipitators. The study recommends a detailed inventory of environmental cost plans and potential cost escalation to anticipate risk factors. It also highlights the need for regular maintenance of machines that are known to frequently produce emissions. These efforts are expected to reduce the emissions and lower the costs of environmental management and monitoring.
Developing Website-Based Multimedia for Self-Talk to Increase Self-Awareness Among Guidance and Counseling Students in the Special Region of Yogyakarta Syarifudin; Suwarjo; Anisa Siti Nurjanah; Ida Rosyida
G-Couns: Jurnal Bimbingan dan Konseling Vol. 10 No. 01 (2026): January 2026, G-Couns: Jurnal Bimbingan dan Konseling
Publisher : Universitas PGRI Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31316/g-couns.v10i01.7626

Abstract

Self-talk is one strategy that can increase self-awareness. This research aims to design a self-talk multimedia product that meets feasibility criteria and effectively increases students' self-awareness. Using the Borg and Gall development model, data were obtained through expert assessments, user ratings, and self-awareness scales, which were validated using Aiken's V and tested for reliability using Cronbach's Alpha. Qualitative analysis was carried out on validator and user suggestions, while quantitative analysis used feasibility percentages and t-tests. The results of the study show that multimedia self-talk is suitable for use, with 80% of media experts and 97.1% of material experts. Paired t-tests revealed significant improvements in self-awareness (p < 0.05; pretest = 72.49; posttest = 76). These findings prove that multimedia self-talk is effective in increasing students' self-awareness. The implication is that this product can be an innovation in technology-based guidance and counseling services that support students' learning independence and self-reflection. Kata kunci: multimedia, self-talk, self-awareness
Karakteristik Emisi CO dan HC Mesin bensin SOHC 110cc Berbahan bakar Pertalite-Alkohol Syarifudin; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman; Yohana, Eflita; Syaiful
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1067

Abstract

Community economic activities that encourage motorized vehicles are getting higher. This exacerbates dependence on fossil fuels and air pollution. The outside air that is contaminated with exhaust gases from combustion products is very dangerous for human health. Motorized vehicles such as motorcycles are the largest cause of air pollution. Alcohols have high octane number and low viscosity. The use of ethanol and methanol alcohols is very diverse, so they are easy to obtain. Therefore, alcohol ethanol and methanol are suitable as premium fossil fuel mixtures. This study aims to observe the CO and HC emission characteristics of the gasoline engine using a premium-alcohol mixture of ethanol, methanol. The alcohol concentration was varied from 5% to 15% at 5% intervals. The petrol engine is operated at 2000, 3000, and 4000rpm. Commercial Gas Analyzers are used to measure CO and HC emissions coming out of the exhaust. The results of the observations present the CO and HC emissions of the engine with premium-ethanol fuel, methanol is lower than pure premium (P100). CO emissions from PE15 fuel decreased to 66,30%, and PM15 decreased to 90,63%. Meanwhile, PE15 fuel HC emissions decreased by 58,94%, and PM15 decreased by 68,60%.
Pengaruh Exhaust Gas Recirculation (EGR) Terhadap Exhaust Gas Temperature (EGT) dan Smoke opacity Mesin Diesel 4JB1 Berbahan Bakar Biodiesel Jatropa-etanol Syarifudin; Faqih Fatkhurrozak; Firman Lukman Sanjaya; Ahmad Farid
Infotekmesin Vol 13 No 2 (2022): Infotekmesin: Juli, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i2.1542

Abstract

Human dependence on motorized vehicles is getting higher and uncontrollable. This actualization will certainly have an impact on reducing fuel stocks and air pollution with soot emissions. Combining diesel fuel with jatropha and alcohol is predicted to reduce dependence on diesel fuel and air pollution. Supplying the combustion chamber with exhaust gas/Exhaust Gas Recirculation/EGR is also predicted to reduce soot emissions and reduce fuel consumption. This study aims to observe the effect of using the EGR system on the use of mixed fuel jatropha and ethanol exhaust gas temperature/EGT as an indication of performance and soot/smoke opacity as exhaust emissions. The experimental results show the use of the EGR system increases EGT and Smoke opacity decreases the diesel engine in each fuel variation. D100 fuel EGT increased 1.67%, DJ10 increased 0.71%, DJ10E increased 0.67%, DJ20 increased 1.45%, DJ20DE increased 1.07%, DJ30 increased 1.50%, and DJ30E fuel EGT increased by 1.47%. While on the emission side, the smoke opacity of D100 fuel decreased by 1.84%, DJ10 decreased by 1.71%, DJ10E decreased by 2.21%, DJ20 decreased by 0.96%, and DJ20E decreased by 2.33, DJ30 decreased by 2.99%, and DJ30E fuel decreased 1.30%.
Uji Eksperimental Emisi Gas Buang Mesin Bensin 160 cc Berbahan Bakar Campuran Pertalite-Butanol dan Pertalite-Diethyl Ether (DEE) Firman Lukman Sanjaya; Syarifudin; Faqih Fatkhurrozak; Nur Aidi Ariyanto
Infotekmesin Vol 13 No 2 (2022): Infotekmesin: Juli, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i2.1543

Abstract

Air pollution is increasing due to the high exhaust emissions of motorized vehicles using fossil fuels. The solution is the use of alternative energy. Butanol and Diethyl Ether (DEE) are alcohols that can be used as a fuel mixture and are environmentally friendly. This is because butanol and DEE have high oxygen levels so the oxidation process in the combustion chamber increases and the residual gas results from combustion is better. This study tested the residual gas from the combustion of a 160 cc gasoline engine using a mixture of pertalite-butanol and pertalite-DEE fuels with 5%, 10%, and 15% alcohol percentages. The test results show that adding DEE produces better engine exhaust emissions than adding butanol. CO emissions decreased by 87% using DEE15 while B15 reduced CO by 72%. DEE10 improves HC by 73% while B15 improves HC by 72%. However, DEE15 increases CO2 by 17% and B15 by 11%. Meanwhile, the oxygen content increased by 8% in DEE15 and 6% in B15 compared to pure pertalite.
Analisis Penambahan Methanol 5%, 10% dan 15% Terhadap Torsi, Daya dan Exhaust Gas Temperature (EGT) Mesin Bensin 150 CC Berbahan Bakar Pertamax Fatkhurrozak, Faqih; Lukman Sanjaya, Firman; Syarifudin; Nur Akhmadi, Amin; Ariyanto, Nur Aidi; Gunawan
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2064

Abstract

Indonesia is one of the countries that uses the most motorized vehicles, which increases air pollution and fuel crises. Using biofuel is one solution to overcome this problem. Methanol is used as a mixture of Pertamax to produce environmentally friendly and renewable biofuel. This is because methanol has high octane and oxygen. Mixing methanol in Pertamax was carried out to analyze the impact of Torque, Power, and Exhaust Gas Temperature (EGT) of a 150cc petrol engine. Methanol 5%, 10%, and 15% was mixed into Pertamax with engine speed variations of 1000, 2000 and 3000 rpm. Dynotest is used to measure engine performance and thermocouples to measure EGT. Test results show the highest increase in engine torque and power of up to 25% at a speed of 2000 rpm with the PM15 mixture compared to P100. The highest reduction in EGT value occurred when using the PM15 mixture at a speed of 1000 rpm up to 28% compared to P100. This shows that the addition of methanol to Pertamax increases torque and power and reduces the EGT of the gasoline engine.
Brake Thermal Efficiency dan Exhaust Gas Temperature Mesin Bensin Berbahan Bakar Gasoline-Butanol Sanjaya, Firman Lukman; Fatkhurrozak, Faqih; Syarifudin; Nur Akhmadi, Amin
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2154

Abstract

The development of butanol as a gasoline additive is encouraged by the government to reduce pollution and the fuel crisis. This is because butanol is a green fuel that is environmentally friendly and can be produced. In addition, the octane number and high oxygen concentration in butanol optimize engine performance and improve exhaust emissions. This research correlates engine power and Brake specific fuel consumption (BSFC) with the BTE of gasoline-butanol-fueled engines and identifies the content of Nox compounds in exhaust gases through engine Exhaust Gas Temperature (EGT). The percentage of butanol in gasoline is 5% -15%. Engine speed from 1000-3000 rpm. Dynotest is used to measure BTE while the thermocouple is used to measure exhaust gas temperature. This research proves that the addition of butanol increases energy absorption which is converted into power with effective fuel consumption which means BTE increases. The highest BTE increase was 21.7% in the B15 blend. EGT decreased by 8.6% in the B16 mixture compared to B0. This identifies that the concentration of Nox in the exhaust gas also decreases.
Co-Authors Aan, Milki Abubekar, Udin Ahmad Farid Aisyah Nur Atika Ali Murtadho Amanda, Ridho Rizky Ambarita, Novitasari Andri Zulpan angelia, novita mayasari Anisa Siti Nurjanah Ardi Ariyanto, Nur Aidi Budhi Hendrawan, Andre Chatila Maharani Desi Ramayanti Dina Liana Dwi Budi Srisulistiowati Eflita Yohana Elizabeth Nafthaliana Bermuli Erasma Eriani, Eva Erma Susanti Faqih Fatkhurrozak Fatkhurrozak, Faqih Fatorrohman Firman Lukman Sanjaya Gunawan Haidor Hisni Rahmi Ida Rosyida Ilham Yustar Afif Ita Fitriati K Khutobah Khumaidi Usman, Muhamad Kurrata A’yunin Kusnadi Kuzmin Anton Lukman Sanjaya, Firman Lutfi Ariefianto Luthfi M. Edi Pujianto Madaniah Maimunah Masriani . Misno MUHAMAD Muhammad Irfan Syahroni Muhammad Omar Rusydi Muhammad Subri Mukti, Aryani Kusuma Musdirwan NINA AGUSTINA Nur Aidi Ariyanto Nur Akhmadi, Amin Oktia Woro Kasmini Handayani Purnomo Rahmi Ulfa restu juniah, restu Ridhwan, M Rimanda, Fiqri Roby Rovi Azmi Saefudin, Slamet Salsabila Samsudi Raharjo Sanjaya, Firman Lukman Sari Pratiwi, Yasintha Setijo Budi, Sigit Sherly Nelsa Fitri Sikki, Nurhaeni Soni Ariawan Sri Mulyati Suhartana Supriyanto Suwarjo Syahrani, Achmad Muharram Syaifudin Zakir, Syaifudin Syaiful Syarifuddin Tjandring, Yuni Cynthia Dewi Widyaswati, Rahmatya Zaikalina, Rabbania Zidan Rais , Rifqi