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All Journal NOTARIUS JIPTEK : Jurnal Ilmiah Pendidikan Teknik dan Kejuruan Jurnal Nagara Bhakti: Jurnal Pengabdian Kepada Masyarakat Jurnal Mekanikasista Nozel : Jurnal Pendididikan Teknik Mesin Folia Medica Indonesiana
Budi Harjanto
Universitas Sebelas Maret Surakarta
Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Neuroscience Public Health Social Sciences Transportation Other

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ANALISIS PENGARUH KEGUNAAN RING DIESEL PADA SALURAN BAHAN BAKAR SOLAR TERHADAP DAYA MESIN DIESEL Harjanto, Budi; Wijanarko, Heri; Sukahar
JURNAL MEKANIKASISTA Vol. 13 No. 1 (2025): NOVEMBER 2025
Publisher : PPM Sdirjianbang Akademi Militer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63824/jtmp.v13i1.388

Abstract

This study discusses the influence of an additional device installed on vehicles called the Diesel Ring. Based on existing facts, the performance of diesel engines today is still often questioned, especially in terms of power output. As we know, people currently demand greater power from diesel engines to achieve optimal results. This growing demand has led to the rise of many aftermarket devices on the market that claim to increase the power of diesel engines. Therefore, the Diesel Ring was selected as an alternative solution to address this issue, as it offers several advantages, such as the ability to enhance engine power. In addition, the diesel engine was chosen over the gasoline engine because diesel engines have several superior characteristics, including higher efficiency and longer engine lifespan. Based on the research results, it can be concluded that the installation of the Diesel Ring can improve the power output of a diesel engine, both at low and high engine speeds.
ANALISIS PERBANDINGAN PENGGUNAAN BAHAN BAKAR GASOHOL BE-20 DAN BENSIN JENIS PERTAMAX TERHADAP PRESTASI MESIN KENDARAAN KIJANG 7K Harjanto, Budi; Lufti, Aryananta; Silitonga, Frangky
JURNAL MEKANIKASISTA Vol. 13 No. 1 (2025): NOVEMBER 2025
Publisher : PPM Sdirjianbang Akademi Militer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63824/jtmp.v13i1.392

Abstract

This research was conducted to determine the performance of an engine using a gasoline–ethanol fuel blend produced by the Enduro XL engine. To evaluate engine performance, calculations were carried out on effective power, fuel consumption, specific fuel consumption, and mass flow rate. In addition, theoretical mass flow rate, air–fuel ratio, volumetric efficiency, and thermal efficiency were also examined. The experiment was carried out under five variations of engine speed with a constant load, using only one type of fuel, namely Pertamax (gasoline) blended with 20% ethanol. The test results showed that the average power produced by the blended fuel was greater than that of pure gasoline. Fuel consumption increased with higher engine speed because the octane number of the gasoline–ethanol blend was higher than that of pure gasoline, making it more easily combustible. However, the higher the ethanol content in the fuel blend, the lower the air–fuel ratio, resulting in less complete combustion in the combustion chamber. The thermal efficiency of the blended fuel was generally lower than that of pure Pertamax, except for the 20% ethanol blend. Therefore, engine performance using Pertamax fuel was higher than that using BE-20 gasohol. However, fuel consumption for Pertamax was greater compared to BE-20 gasohol.
Distribution of Human Papilloma Virus (HPV) in Cervical Adenocarcinoma and Adenosquamous Carcinoma Mastutik, Gondo; Rahniayu, Alphania; Kurniasari, Nila; Rahaju, Anny Setijo; Harjanto, Budi
Folia Medica Indonesiana Vol. 57, No. 2
Publisher : Folia Medica Indonesiana

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Approximately 20-30% of all cervical cancer cases are adenocarcinoma and adenosquamous carcinoma. Around 70% of all of these types of cancer are related to infection of Human Papillomavirus (HPV). This study evaluated the distribution of HPV genotype in cervical adenocarcinoma and adenosquamous carcinoma. A cross-sectional study was conducted at the Department of Anatomic Pathology, Dr. Soetomo General Academic Hospital, Surabaya, Indonesia, from January to December 2015. The sample were 22 formalin-fixed paraffin-embedded (FFPE) of cervical adenocarcinoma tissues and adenosquamous carcinoma tissues. FFPE was used for DNA extraction and followed with HPV genotyping to detect 40 genotypes of HPV, including low risk (LR) and high risk (HR) HPV. The histopathological types of adenocarcinomas were adenocarcinoma NOS and mucinous adenocarcinoma, while the adenosquamous carcinoma types were adenosquamous carcinoma and adenosquamous carcinoma glassy. All of the specimens were infected by HPV. In cervical adenocarcinoma, the infection was by HPV 6, 11, 16, 18, 31, 45, 68B, and 72, and in adenosquamous carcinoma by HPV 6, 16, 18, 45, and 59. HPV 18 was predominant, which was found in 13/22 (59.1%) in adenocarcinoma and 19/22 (86.4%) in adenosquamous carcinoma. Single infection and multiple infections in adenocarcinoma were 13/22 (59.1%) and 9/22 (40.9%), while in adenosquamous carcinoma were 21/22 (95.5%) and 1/22 (4.5%) respectively. The most common HR HPVs found in this study were HPV 18, HPV 45, HPV 16 and LR HPV are HPV 11, HPV 6.
PENGARUH VARIASI PENAMBAHAN KADAR AIR DENGAN BAHAN PENGIKAT BENTONIT TERHADAP KARAKTERISTIK PASIR CETAK DAN CACAT POROSITAS HASIL PENGECORAN LOGAM PADUAN Al-Si Saputra, Fajar Rizki; Harjanto, Budi; Sriwardani, Nyenyep
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 4 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i4.42460

Abstract

The purposes of this research was to learns (1) the effect of adding moisture content to the permeability of sand casting; (2) the effect of adding moisture content to the compressive strength of sand casting; and (3) the effect of adding moisture content to porosity defects in casting results. This research is conducted at Manufacturing Polytechnic, Ceper, Klaten. The method that used is pre-experimental design with design one-shot case study. The independent variable in this research are variations of moisture content of 4%, 6%, and 8%, with the dependent variable are permeability and compressive strength of sand casting, and porosity defect of Al-Si alloy cast. The permeability test by using permeability meter, compressive strength test by using universal strength machine¸ and porosity defect test of cast result on qualitative with visual observation and quantitative with calculation of porosity percentage.  The results of  the adding of moisture content  of 4%, 6%, and 8% in the sand casting showed that: (1) The higher the addition of water measure on sand casting decrease the permeability value. The highest permeability value in the addition of 4% water measure is 103.67 cm3/min, while the lowest in the addition of 8% water measure is 83.00 cm3/min; (2) The higher water content in the printed sand further decreases the value of its compressive strength. The lowest compressive strength value occurred at 8% water measure increase of 39.00 KN/m2, while the highest value of compressive strength was obtained at 4% water measure addition 47.56 KN/m2; (3) The higher water measure of sand casting will result in a higher percentage of porosity defects on the casting results. The lowest percentage of porosity defect was obtained by adding 4% water measure is 1.56% from total volume, while the highest was 8% water measure is 3.06% from total volume.
Analisis Efisiensi Kerja Mesin Pencacah Rumput dengan Variasi Jumlah 4 dan 6 Mata Pisau menggunakan Mesin 5,5 Hp Ardianto, Renaldo Adhe; Harjanto, Budi
Nozel : Jurnal Pendididikan Teknik Mesin Vol 8, No 1 (2026)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v8i1.117551

Abstract

This research aims to determine the effect of the number of blades on the performance of a grass chopping machine, particularly on working capacity, chopping time, and the quality of chopping results, as well as to identify the most optimal blade. The research method employed was an experimental approach with a quantitative design using two variations in the number of blades, namely 4 blades and 6 blades. The tests were conducted using a grass chopping machine powered by a 5.5 HP gasoline engine operating at 2300 RPM, with elephant grass used as the test material. Each variation was tested five times under the same conditions. The performance of the machine was evaluated based on working capacity (kg/hour), chopping time (seconds), and the quality of chopping results measured by the average length of the chopped grass (cm). The results showed that the number of blades significantly affected the machine performance. The average working capacity produced by 6 blades was 274,446 kg/hour, higher than 4 blades which produced 194,698 kg/hour. The fastest chopping time using 6 blades was 12,49 seconds, while 4 blades required 17,18 seconds. In terms of chopping quality, 6 blades produced finer results with an average length of 4,16 cm compared to 4 blades with an average length of 4,52 cm. These findings indicate that the use of 6 blades provides more optimal performance in increasing working capacity, reducing chopping time, and improving the quality of chopped grass.
Analisis Pengaruh Variasi Kecepatan Putar (RPM) Terhadap Kinerja Mesin Pencacah Rumput Tomo, Tri Tam; Harjanto, Budi
Nozel : Jurnal Pendididikan Teknik Mesin Vol 8, No 3 (2026)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v8i3.119506

Abstract

This study aims to analyze the performance of a grass chopping machine with a controlled cutting size system in terms of chopping capacity and quality of the cutting results. The background of this research is driven by the need for efficient, uniform, and easily digestible forage for livestock. The method used is an experimental approach with variations in rotational speed (RPM) and feeding mechanism as independent variables, while chopping capacity and cutting length are treated as dependent variables. Data were collected through direct testing of the designed machine by measuring processing time, material weight, and the length of the chopped output. The results indicate that increasing rotational speed significantly improves chopping capacity; however, it also tends to produce shorter and less uniform cutting results. In addition, a stable feeding mechanism contributes to more consistent cutting quality. Therefore, an optimal combination of operational parameters is essential to achieve the best machine performance. This research is expected to serve as a reference for the development of more efficient and practical grass chopping machines for livestock feeding systems.
HUBUNGAN LINGKUNGAN FISIK BENGKEL DAN BUDAYA KERJA TERHADAP HASIL BELAJAR PRAKTIK PEMESINAN BUBUT SISWA KELAS XI SMK MUHAMMADIYAH 1 GONDANGREJO Fanani, Afrizal Rosyid; Harjanto, Budi; Estriyanto, Yuyun
Nozel : Jurnal Pendididikan Teknik Mesin Vol 2, No 2 (2020)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v2i1.43227

Abstract

This study aims to: (1) Determine the relationship of the physical environment of the workshop on the learning outcomes of lathe machining practices of class IX students  in Vocational High School of Muhammadiyah 1 Gondangrejo; (2) Determine the relationship of students' work culture on learning outcomes of lathe machining practices of class IX students  in Vocational High School of Muhammadiyah 1 Gondangrejo; and (3) Determine the relationship of the physical environment of the workshop and work culture on the learning outcomes of lathe machining practices of class IX students  in Vocational High School of Muhammadiyah 1 Gondangrejo. This research is a quantitative study, with a research method that is ex-post facto. The variables in this study are the physical environment of the workshop and work culture as independent variables and the learning achievement of machining lathe as the dependent variable. The population in this study is class XI students of the Mechanical Engineering expertise program in Vocational High School of Muhammadiyah 1 Gondangrejo with 157 students. The sample in this study is 79 people. Retrieval of data used questionnaire and documentation methods. The data obtained were analyzed by multiple regression analysis. The results of this study are: (1) The physical environment of the workshop has a positive and significant relationship on the learning outcomes of lathe machining practices of class IX students  in Vocational High School of Muhammadiyah 1 Gondangrejo with a effective contribution of 16.6% to the high student learning outcomes (2) Work culture has a positive and significant relationship on the learning outcomes of lathe machining practices of class IX students in Vocational High School of Muhammadiyah 1 Gondangrejo with a effective contribution of 18.3% to the high student learning outcomes and (3) The physical environment of workshop and work culture has a positive and significant impact on learning achievement of lathe machining practices the learning outcomes of lathe machining practices of class IX students  in Vocational High School of Muhammadiyah 1 Gondangrejo with a effective contribution of 34.9% to the high student learning outcomes.
PENGEMBANGAN MEDIA PEMBELAJARAN CNC BERBASIS PERANGKAT LUNAK ANIMASI Ulinnuha, Dwi Kusuma; Harjanto, Budi; Widiastuti, Indah
Nozel : Jurnal Pendididikan Teknik Mesin Vol 1, No 1 (2019)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v1i1.28482

Abstract

This research aims to (1) develop an instructional material based animation software for CNC course, (2) evaluate instructional material for CNC course that has been developed. The research was conducted at the Department of Mechanical Engineering Education, Faculty of Teacher Training and Education, Sebelas Maret University Surakarta. This research used Multimedia Development Life Cycle (MDLC) as research procedure, which consists of six stages, concept, design, collecting material, assembly, testing and distribution. Evaluation of instructional material for CNC course was performed by ask potential users to operate CNC instructional material that have been developed, then get response from potential users through a questionnaire. Potential users are divided into two categories, lecturers of CNC and CAM courses and students of Mechanical Engineering Education who take CNC and CAM courses in the academic year 2015/2016. Questionnaire for lecturers of CNC and CAM course reviewing instructional material from aspects of learning content, interaction, and presentation of the material. The questionnaire was given to 3 lecturers consisting of 15 point statements with Rating Scale as assessment system on intervals 1-5. Questionnaire for student reviewing instructional material from aspect of learning motivation as one of instructional material function. Questionnaire was given to 26 students consisting of 20 point statements with Likert Scale as assessment system on intervals1-5. The results of the research show (1) the development of instructional material for CNC course used Adobe Flash CS6 as main software with MDLC as development procedure, (2) the evaluation results show the instructional material for CNC course that developed gets (a) in aspects of learning content, interaction, and presentation of the material, the instructional material for CNC course gets very good category with percentage 90,22%, (b) in the aspect of learning motivation as one of instructional material function, the instructional material for CNC course gets good categories with percentage 78,39%.
Analisis Perbandingan Efisiensi Kinerja Mesin Pencacah Rumput 6.5 Hp dan 5.5 Hp menggunakan 4 Mata Pisau Sripratama, Eki; Harjanto, Budi
Nozel : Jurnal Pendididikan Teknik Mesin Vol 8, No 2 (2026)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v8i2.117552

Abstract

This study aims to analyze the comparative performance efficiency of grass chopper machines powered by 6.5 Hp and 5.5 Hp using four blades under constant rotational conditions of approximately 2300 rpm. The research employed an experimental method with a comparative design. Data were collected through direct testing of both machines, focusing on effective capacity, fuel consumption, time efficiency, and chopping quality. Each test was repeated five times using measuring instruments including a scale, stopwatch, measuring cup, and ruler. The results show that the 6.5 Hp machine achieved a higher average effective capacity of 196.27 kg/h and time efficiency of 3.26 kg/min compared to the 5.5 Hp machine, which produced 194.7 kg/h and 3.24 kg/min. However, the 5.5 Hp machine demonstrated better fuel efficiency at 0.066 liters/kg, while the 6.5 Hp machine consumed 0.080 liters/kg. The chopping quality of both machines was relatively uniform with no significant differences observed. These findings indicate that engine power affects capacity and working speed, while lower power engines tend to be more fuel efficient. Therefore, machine selection should consider operational needs, scale of use, and fuel efficiency.
Perencanaan Pembelajaran Berbasis Teaching Factory pada Kompetensi Keahlian Teknik Pemesinan di SMK Bhinneka Karya Surakarta Kafi, Ahmad; Utomo, Andhika Budi; Setyawan, Apri Ghuntur; Kholis, Aqis Nur; Aji, Bayu Handoyo; Cahyanto, Bimo Tri; Harjanto, Budi; Sulistyo, Sulistyo
Nozel : Jurnal Pendididikan Teknik Mesin Vol 6, No 1 (2024)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v6i1.84044

Abstract

This research aims to describe the teaching factory planning process, the use of the teaching factory application, and its assessment to improve student competency at Bhinneka Karya Surakarta Vocational School. The Teaching Factory planning design was carried out based on the results of observations and analysis at Bhinneka Karya Vocational School, Surakarta. In-depth interview techniques, observation and documentation were used to collect data. Interactive models play a role in analyzing data and procedures starting with data collection, reduction, presentation and verification of conclusions. Research findings show that the implementation of teaching factory-based learning in the context of developing student competency begins with planning, implementation of learning, production/service activities, industrial collaboration, impacts and obstacles faced. In planning the teaching factory, utilizing strategies to realize change, the material in class, titles and job sheets are adjusted to existing standards in the industry, educators adapt the practices carried out by students so that they are equipped to deliver quality material that is driven throughout the day, the talents that they will carry out. Through teaching factories, student competence can be improved with various learning procedures that have been established in the curriculum and implemented for vocational school students.
Co-Authors Aji, Bayu Handoyo Akbar, Farhandika Alim, Ferindra Alphania Rahniayu Anny Setijo Rahaju, Anny Setijo Ardianto, Renaldo Adhe Aryananta Lufti Bahrudin, Faqih Bantara, Maulana Arbi Cahyanto, Bimo Tri Fanani, Afrizal Rosyid Frangky Silitonga Gondo Mastutik Heri Wijanarko Herman Saputro Hidayat, Faras Nur Indah Widiastuti Irma Cahyaningtyas, Irma Kafi, Ahmad Kholis, Aqis Nur Lufti, Aryananta Lumintang, D.Ricky Ngatou Rohman Nila Kurniasari Nyenyep Sriwardani, Nyenyep Pamungkas, Mukhlis Dwiaji Perdana Sutrisno, Valiant Lukad Pratama, Dadang Ramadhan, Rangga Yanuarestu Ranto Ranto Rusdianto, Ichsan Saputra, Fajar Rizki Sasongko, Wisnu Dimas Setyawan, Apri Ghuntur Siwi, Dewi Rima Ratri Sripratama, Eki Suharno Suharno Sukahar Sukahar, Sukahar Sukirno Sukirno Sulistyo Sulistyo Suparyana Tomo, Tri Tam Towip, Towip Ulinnuha, Dwi Kusuma Ulya, Amin Hakim Nur Utomo, Andhika Budi Wicaksono, Rochim Toat Yuyun Estriyanto