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All Journal Jurnal Manajemen Pendidikan: Jurnal Ilmiah Administrasi, Manajemen dan Kepemimpinan Pendidikan Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian JEJAK Jurnal Ilmu Teknik Jurnal Riset Pendidikan Matematika Kontinu: Jurnal Penelitian Didaktik Matematika JSEH (Jurnal Sosial Ekonomi dan Humaniora) Madrasah: Jurnal Pendidikan dan Pembelajaran Dasar Jurnal Ekonomi dan Bisnis Islam Jurnal Ilmiah Ekonomi Islam Turbo : Jurnal Program Studi Teknik Mesin Jurnal Bimbingan dan Konseling Ar-Rahman JKTP: Jurnal Kajian Teknologi Pendidikan LIABILITIES (JURNAL PENDIDIKAN AKUNTANSI) Justitia et Pax Dinamisia: Jurnal Pengabdian Kepada Masyarakat JMM (Jurnal Masyarakat Mandiri) ORBITA: Jurnal Pendidikan dan Ilmu Fisika Al-Mashrafiyah : Jurnal Ekonomi, Keuangan, dan Perbankan Syariah EQIEN - JURNAL EKONOMI DAN BISNIS AL-TANZIM : JURNAL MANAJEMEN PENDIDIKAN ISLAM Jurnal Masyarakat Merdeka (JMM) JUPE : Jurnal Pendidikan Mandala Sunan Kalijaga: International Journal of Islamic Civilization Pusaka : Jurnal Khazanah Keagamaan Jurnal Abdimas PHB : Jurnal Pengabdian Masyarakat Progresif Humanis Brainstorming EAJ (ECONOMICS AND ACCOUNTING JOURNAL) Jurnal Akuntansi Kompetif Infotekmesin Media Pendidikan Matematika Pena Kreatif : Jurnal Pendidikan Jurnal Pengabdian Masyarakat Bumi Raflesia International Journal of Insights for Mathematics Teaching (IJOIMT) Asatiza: Jurnal Pendidikan AS-SABIQUN: Jurnal Pendidikan Islam Anak Usia Dini Jurnal khabar: Komunikasi dan Penyiaran Islam Reswara: Jurnal Pengabdian Kepada Masyarakat Mitra PGMI: Jurnal Kependidikan MI Jurnal Disrupsi Bisnis TAJDID: Jurnal Pemikiran Keislaman dan Kemanusiaan Indonesian Journal of Counseling and Development juremi: jurnal riset ekonomi Foremost Journal DIKSI: Jurnal Kajian Pendidikan dan Sosial Humantech : Jurnal Ilmiah Multidisiplin Indonesia Majalah Keadilan Jurnal Impresi Indonesia Jurnal Ekonomika dan Bisnis Islam Jurnal Ekonomi Review Gajah Putih (GPJER) Jurnal Ilmiah Ilmu Manajemen (JUIIM) Taroa : Jurnal Pengabdian Masyarakat Journal of Educational Sciences Kybernology : Journal of Government Studies Jurnal Inovtek Seri Teknik Sipil dan Aplikasi (TekLA) Jurnal Indonesia Sosial Sains Proceeding Applied Business and Engineering Conference Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Eduvest - Journal of Universal Studies Jurnal el-Huda: Jurnal Pendidikan, Sosial, dan Keagamaan JOURNAL OF SOCIAL DEVELOPMENT IIJSE Cendikia Pendidikan Medic Nutricia : Jurnal Ilmu Kesehatan Law Journal JPK: Jurnal Pendidikan dan Kebudayaan Nozzle : Journal Mechanical Engineering Hexagon: Jurnal Ilmu dan Pendidikan Matematika E-Amal: Jurnal Pengabdian Kepada Masyarakat JERIT: Journal of Educational Research and Innovation Technology Jurnal Pendidikan Progresif South East Asian Journal of Advanced Law and Governance Media Pendidikan Matematika
Syarifudin Syarifudin
Jurusan PWK – UNDIP
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Students' Perception on the Use of Google Classroom in Learning English: A Case Study at A State Islamic Secondary School Widiyastuti, Nanik; Syarifudin, Syarifudin; Ariawan, Soni
Foremost Journal Vol. 4 No. 1 (2023): Volume 4 No. 1 February 2023
Publisher : Teacher Training and Education Faculty of Syekh-Yusuf Islamic University Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33592/foremost.v4i1.3302

Abstract

The purpose of this study was to determine students' perceptions of online English learning during the covid-19 pandemic at State Islamic Secondary School (MTsN) 3 Mataram. This research is a descriptive research with a qualitative approach. Data was collected through a questionnaire which involved 40 students from class VIII-A. Based on the data analysis from questionnaire, it can be concluded that the students neutrally perceive the utilization of Google Classroom as they found several challenges such as absence of interaction room, lack of internet access etc. However, the interview results indicated that most of them have a positive perception on the use of Google Classroom during the COVID-19 pandemic due to ease of use, the flexibility and effectiveness as well as its access. It is suggested that teachers should be able to adjust their teaching strategy by considering students' factual condition as well as preferences.
PROBLEMATIKA PEMBUKTIAN DALAM TINDAK PIDANA MALPRAKTIK DOKTER DITINJAU DARI UNDANG-UNDANG NOMOR 17 TAHUN 2023 TENTANG KESEHATAN Syarifudin, Syarifudin
Justitia et Pax Vol. 40 No. 2 (2024): Justitia et Pax Volume 40 Nomor 2 Tahun 2024
Publisher : Penerbit Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jep.v40i2.8262

Abstract

The malpractice is still far from the reach of criminal procedure. There are no specific regulations on malpractice and there are problems in proving criminal acts of malpractice so that this article uses the theory of evidence to provide legal certainty to fulfill the elements of error and criminal responsibility. This study uses a normative method to answer this problem so that the statute approach and case approach are used. The results of the study show that the problems in proving criminal acts of malpractice and the difficulty of collecting evidence (unus testis nullus testis) are obstacles to assisting the legal process, the complexity of proof in criminal law which is material and problematic in the legal vacuum space limited to the Criminal Code. Contextually, criminal responsibility for malpractice is not specifically regulated in the Criminal Code or medical malpractice, but after the enactment of Law 17 of 2023 concerning Health, it provides hope in protection and helps victims in seeking justice even though cases reported by victims are often in SP3 (Investigation Termination Order).
Analisis Tegangan City Electric Car Torsi Beam Suspension Menggunakan Metode Finite Element Model (FEM) Setijo Budi, Sigit; Suprihadi, Agus; Syarifudin, Syarifudin
Infotekmesin Vol 12 No 1 (2021): Infotekmesin: Januari 2021
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v12i1.463

Abstract

The torsion beam is one of the most important parts of an electric car. The torsion beam can accept the loading of vehicle structures statically and dynamically. The movement of the vehicle, such as turning, turning with a bumpy road contour, affects the stress limit that the torsion beam can support. This study aims to simulate the effects of shifts such as deflection and stress on the use of a torsion beam suspension. The method used is a loading simulation using the Finite Element Model (FEM) model. The results showed that the maximum deflection effect occurred in the 2000N loading of 1.5347 mm, while the maximum stress effect occurred in the 2000N loading of 2342.57N.
Efek Penambahan Butanol Terhadap Emisi dan Temperatur Gas Buang Mesin Bensin EFI Menggunakan EGR Lukman Sanjaya, Firman; Syarifudin, Syarifudin; Fatkhurrozak, Faqih
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.v13i1.677

Abstract

The high octane number and oxygen content of butanol can improve combustion more completely and the residual gas resulting from engine combustion is more environmentally friendly. This study examines the effect of adding 5% to 15% butanol at 5% intervals on a gasoline engine with an EGR system with premium fuel on emissions and exhaust gas temperatures. The exhaust gas analyzer was used to measure the combustion gases. Exhaust gas temperature was measured using a thermocouple mounted on the exhaust manifold. The mixture of P85B15 reduced CO levels by 68.11% and HC by 37.50% compared to P100. However, CO2 emissions and exhaust gas temperatures increased. The use of hot and cold EGR generally increased engine exhaust emissions. However, the exhaust gas temperature decreased by 4.72% when the engine used cold EGR and 1.33% when the engine used hot EGR.
Pengaruh Penambahan methanol Terhadap Emisi Bahan Bakar Mesin Sepeda Motor Berbahan Bakar Pertamax 150 CC Fatkhurrozak, Faqih; Sanjaya, Firman Lukman; Syarifudin, Syarifudin; Hendrawan, Andre Budhi; Usman, M. Khumaidi; Gunawan, Gunawan
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1719

Abstract

Automotive vehicles have increased every year, especially motorcycles, which result in increased air pollution. The use of alternative fuel methanol is one of the solutions to control air pollution. methanol has a high oxygen content so it can improve emissions. This study aims to analyze the use of a mixture of Pertamax and methanol fuel on exhaust emissions using a 150 cc EFI gasoline engine. The percentage of methanol used in the test is 5%, 10%, and 15%. Variation of engine speed from 1000 to 3000 rpm with an interval of 1000 rpm. Measurement of exhaust emissions using a gas analyzer. The addition of methanol to Pertamax fuel reduced HC emission levels at PM15 by 34% at 3000 rpm and CO by 43% at 3000 rpm at PM15, while CO2 and O2 emission levels increased by 23% at 3000 rpm at CO2, mixing PM15 and at O2 emissions of 163% at a speed of 3000 rpm on PM5.
Korelasi Konsentrasi Etanol 5% Pada Bahan Bakar Gasolin Terhadap Performa, dan Emisi Gas Buang Mesin Bensin 150cc Syarifudin, Syarifudin; Yohana, Eflita; Muchammad, Muchammad; Suhartana, Suhartana; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman; Qurohman, M. Taufik
Infotekmesin Vol 14 No 1 (2023): Infotekmesin: Januari, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i1.1737

Abstract

Ethanol has higher octane and oxygen properties than fossil-fuel gasoline. Along with the increase in gasoline dependency and exhaust emissions, the use of ethanol as a fuel is urgently studied. This study aimed to observe the concentration of 5% ethanol in gasoline on the performance and exhaust emissions of a 150cc gasoline engine that was operated at 1000, 2000, and 3000rpm. The observation results show that the concentration of 5% ethanol in gasoline correlates with an increase in performance with indications of an increase in EGT, Brake power, BTE, and a decrease in SFC. On the emission side, it is also correlated with an increase in the quality of exhaust emissions with indications of increased CO2 emissions and reduced CO and HC emissions. The best correlation of 5% ethanol concentration was obtained at an operating speed of 2000rpm with an increase in EGT of 10.70%, an increase in Brake power of 9.49%, an increase in BTE of 38.62%, an increase in CO2 emissions of 23.06%, a decrease in SFC of 26 .49%, CO emission reduction of 16.67%, and HC emission reduction of 4.24%.
Analisis Perpindahan Gaya SideLoad Pegas Suspensi Tipe C Menggunakan Finite Element Method (FEM) Budi, Sigit Setijo; Lukman Sanjaya, Firman; Fatkhurrozak, Faqih; Syarifudin, Syarifudin; Ariyanto, Nur Aidi
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1783

Abstract

The suspension must provide comfort and safety to the vehicle. Therefore, it is necessary to analyze the load's effect on the pressure distribution on the axle so that the spring strength from the sideload force can be simulated. This study aims to analyze the sideload force of type C suspension springs using FEM. Spring variations are the number of different threaded coils, namely 11, 12, and 13. In the FEM simulation, the spring is given a load until 50mm, 100mm, 150mm, 200mm, and 250mm displacement occurs. The loading spreads to the X, Y, and Z axes. Each direction of the axis is measured by the pressure that occurs. The results showed that the pressure values that occur on the X, Y, and Z axes decreased with each increase in the number of screw coils. The lowest X-axis pressure reduction occurs in thread 12 at 63%. Meanwhile, the pressure on the Y axis decreased by 27% on the spring screw 12. The highest decrease in pressure on the Z axis occurred by 34% on the spring screw 12 compared to the spring screw 11.
Efek Pencampuran Butanol dan Diethyl Ether (DEE) Pada Pertalite Terhadap Torsi, Daya dan Brake Spesific Fuel Consumpsion Mesin Bensin 160cc Sanjaya, Firman Lukman; Usman, M. Khumaidi; Fatkhurrozak, Faqih; Syarifudin, Syarifudin; Hendrawan, Andre Budhi
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1906

Abstract

The increase in the volume of vehicles resulted in a crisis of fossil fuels so there is a need for alternative fuels to replace gasoline. Butanol and Diethyl Ether (DEE) are alternative fuels that can be added to gasoline. This is because the Octane Number and high O2 levels optimize combustion in the cylinder and increase torque and power and save fuel. This study compares the addition of butanol and DEE to gasoline on torque, power, and Brake Specific Fuel Consumption (BSFC). The study used a 160cc gasoline engine with a carburetor with engine speeds of 1000, 2000, and 3000 rpm. Variation of fuel mixture 5%, 10%, and 15% on gasoline. The results showed that the DEE15 mixture increased the highest torque by 28% at 3000 rpm compared to other fuel mixtures. Engine power also increases the highest by 28% when using a mixture of DEE15 compared to other fuels. Meanwhile, BSFC experienced the highest decrease of 19% when using the DEE15 mixture compared to other mixtures.
Produksi Biofuel Berbahan Baku Mangrove Untuk Substitusi Bahan Bakar Gasoline Syarifudin, Syarifudin; Yohana, Eflita; , Muchammad; , Suhartana; Kusnadi; Fatkhurrozak, Faqih; Lukman Sanjaya, Firman
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2318

Abstract

Dependence on fossil fuels requires a solution through alternative fuels. Ethanol is the recommended solution because it is easy to produce using raw materials that are abundant in nature, such as mangrove fruit. The Rhizophora Mucronata type of mangrove fruit contains 45.22% carbohydrates and is not used as raw material for human food. The research aims to produce ethanol biofuel from mangrove raw materials using multistage distillation. Experimental methods were applied at the stages of mangrove flour production, mangrove flour property testing, saccharification and fermentation, mangrove ethanol distillation, and analysis of potential performance and exhaust emissions. The research produced mangrove biofuel with an alcohol content of 28% which was produced from mangrove flour and had an ash content of 1.91%, protein, 2.24%, fat 0.53%, and water 11.61%. In addition, mangrove biofuel has higher viscosity and density properties than Gasoline at 0.8067Cp and 0.8115 g per mL respectively. The use of mangrove biofuel as a result of experiments is predicted to reduce fuel injection performance.
Komparasi Efek Gasoline-Butanol dan Gasoline-Ethanol Terhadap Exhaust Gas Temperature dan Emissions Mesin EFI Sanjaya, Firman Lukman; Fatkhurrozak, Faqih; Syarifudin, Syarifudin; Usaman , M. Khumaidi; Wibowo, Agus
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2335

Abstract

The use of gasoline in vehicles produces CO, HC, and NOx emissions which are dangerous for the environment. Using butanol and ethanol as additional gasoline can reduce pollutant emissions. This is because alcohol has a high oxygen content and helps combustion more completely. This research compares the Exhaust Gas Temperature and Emissions results of EFI engines using gasoline-butanol and gasoline-ethanol. The EFI engine used has a capacity of 150CC. The alcohol used was butanol and ethanol with a percentage of 5%, 10%, and 15% in each test. The test results showed that the highest EGT reduction occurred in the E15 mixture at 23.98% and B15% at 8.65. Meanwhile, CO emissions experienced the highest reduction in E10 by 53.6% and B15 by 44.6%. HC emissions also experienced the highest reduction in E15 by 70.5% and B15 by 66.7% compared to gasoline. However, CO2 emissions increased to 17.07% in the E15 mixture and 11.46% in B15. This proves that the addition of ethanol produces more complete combustion than the addition of butanol.
Co-Authors , Muchammad , Suhartana A. Rahman Abd. Haris Abdul Kohar Abdur Rahman As’ari Adi Apriadi Adiansha Agung Budi Susanto Agus Wibowo Agustian, Rizki Ahmad Tamlikha Ahyar Ahyar Ahyar Ahyar Akem, Umar Alamsyah, Misdar Alfaqih, Adam Alfian Alfian Ali Djamhuri Amiruddin Amiruddin Amri Amri Ana Toni Roby Candra Yudha Anandita, Aulia Silvina Andika Triansyah Anggini, Canda Putri Anita Nurgufriani Aprijal, Aprijal Aprisal, Jelita Septiani Ardiyanto, Riky Arif Hidayad Arif Rahman Hakim Ariyanto, Nur Aidi Arnadi Wiranaya, Arnadi Arya Rezagama Aryanto, Nur Aidi Ashibly Audiya , Siti Azisi, Ali Mursyid Baharudin Baharudin Bastomi, Rakhma Diana Budhi Hendrawan, Andre Busra Busra, Busra Dedeh Kurniasih Dety Mulyanti Diana Novita Djuki Sudarmono Dwi Ayu Putri Edy Bambang Irawan Eflita Yohana Erina Sudaryati Erminawati erminawati Ersis Warmansyah Abbas Fadhilah, Raudhatul Faiza, Nurlaili Adkhi Rizfa Fatkhurrozak, Faqih Fatkrurrozak, Faqih Fauzan, Azkal Rafi Fauzi, Mar’i Fauziyah, Siti Nurul Firdaus Firdaus Firdiansyah, Fitra Azkiya Fithriyaani, Fathimah Gunawan Gunawan Guswandi, Guswandi Haikal Musara Hamdan Hamdan Hamdani Hamdani Hamdi Hamdi Hariz Subhan Hartina, Siti Hasanudin, Qhonsa Nafisa Heikal, Jerry Hendrawan, Andre Budhi Hepatika Zidny Ilmadina Hidayah, Irna Hidayanti, Nuril Hilman, Amirul I Made Sulandra Ilyas Ilyas Imam Santoso Imam Wahyudi Indrawan, Imam Wahyudi Imran, Andria Insyaniyah, Inarotul Irnesari, Ella Irwan Irwan Ishaq, Ahmad Yugita Iskandar, Muhammad Rozi Ita Fitriati Jalil.M, Abd. Karina, Gladys Donna Kartika Melvina Belinda Köten, Hasan Kholidi, Ahmad Khaerul Kusnadi Liana, Dina Lisya, Mutia Lukman Sanjaya, Firman Mahardika, Reski Malawat, Mahdi Mar’i Fauzi, Mar’i Mardiyanto Mardiyanto Masriani . Masruroh, Aniswatun Mega Fatimah Rosana Muchammad Muchammad Muhaimin Abdillah mukhamad khumaidi usman Mukiat Mukiat Mulyadi Mulyadi Mundiroh, Siti Muslim Muslim Nabila Amaro Laila Rosyda Nafiah, Nafiah Nafik Muiz Nur Rasyid Nargis, Desi Nargis Nasrullah Nasrullah Nikmah, Rochmatin Nisa, Zuhriatun Nofaizzi, Mafrur Udif Nur Akhmadi, Amin Nur, Syamsuddin Nurafini, Fira Nurhayati Nurhayati Nurjanah, Anisa Siti Nurmaida , Desy Khusna Nurrahmah Nurrahmah Nurrahmah Nurrahmah, Nurrahmah Nursidi, Nursidi Nuryati Nuryati Nur’aini, Fatwa Oktaviany, Mega Pama, Sindi Ayudia Pamadia, Era Pratama, Eko Pratiwi, Yasintha Sari Purwanto Purwanto Puspita Handayani Putri, Tasya Amelia Qurohman, M. Taufik R, M Ziran Maulana Raden Mohamad Herdian Bhakti Rahayu, Hastanti Agustin Rahman Rahman Rahmat Hidayat Rahmawati, Lusy Ramadhan, Masri Ramiati Ramiati Ranjani, Gita Rinaldi, Sebastian Riyan, Lalu Rizky, Alfida Isabella Rostati, Rostati Rosyida, Ida Rozi Iskandar, Muhammad RR. Ella Evrita Hestiandari Sabri Sabri Safinatunnaja, Indy Safitri, Masna Nuros Saitya, Imaduddin Sanjaya, Firman Sanjaya, Firman Lukman Sapriyanto, Eko Saptaryani, Titiek Deasy Sari, Raihanah Setijo Budi, Sigit Shavira, Lely Sibagariang, Yohanes Sidarta, Alphasyah Lazuardy Sigit Setijo Budi, Sigit Setijo Sona, Dwi Soni Ariawan Sri Amelia, Sri Sri Nurhayati Stiawan, Hari Subanji Subanji Suhartana Suhartana Supardi Supardi Supiyati, Yati Susilawati, Susilawati Syahidin Syahidin, Syahidin Syaiful . Syamsul Arifin Taswanda Taryo Taufikurrahman Taufikurrahman Tiolina Evi Nausta Pardede Tirtasari, Maidaturrizky Titi Yuniarti, Titi Tjiptohadi Sawarjuwono Tuanani, Ismail Tuanany, Ismail Umi Aisyah, Umi Usaman , M. Khumaidi Usman , M. Khumaidi Usman, M. Khumaidi Utami, Vina Bekti Wahyu, Fatwa Wandini, Evi Ayu Widiyastuti, Nanik Yazid, Muhammad Afiq bin Mohd Yoseph, Yoseph Yudhyarta, Deddy Yusuf Yulia Ayriza Yulianisah, Yulianisah Yuniara, Ridha YUSUF HASBULLAH Zamhariri Zamhariri, Zamhariri Zulaidi, Zulaidi Zulkarnaen, Irfan