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All Journal ASEAN Journal of Systems Engineering Majalah Forum Teknik UGM Traksi : Majalah Ilmiah Teknik Mesin BERKALA SAINSTEK Jurnal Teknologi Journal of Engineering and Technological Sciences JDE (Journal of Developing Economies) Indonesian Journal of Chemistry Paedagoria : Jurnal Kajian, Penelitian dan Pengembangan Kependidikan Angkasa: Jurnal Ilmiah Bidang Teknologi JURNAL PENDIDIKAN TAMBUSAI AL-HAYAT: Journal of Biology and Applied Biology Dharma Bakti Edumaspul: Jurnal Pendidikan Prosiding Seminar Nasional Teknik Mesin Jurnal Inovasi Teknik Kimia Journal of Appropriate Technology for Community Services ASEAN Journal of Chemical Engineering Scientific Journal of Mechanical Engineering Kinematika Jurnal Peduli Masyarakat Airlangga Journal of Innovation Management Community Empowerment Jurnal AbdiMas Nusa Mandiri International Journal of Industrial Engineering and Engineering Management INTERNATIONAL JOURNAL OF EDUCATION, INFORMATION TECHNOLOGY, AND OTHERS Automotive Experiences Journal of Mechanical Design and Testing (JMDT) Abdimas Altruis: Jurnal Pengabdian Kepada Masyarakat Jurnal Kiprah Pendidikan International Journal of Islamic Education, Research and Multiculturalism (IJIERM) Prosiding Seminar Nasional Teknologi Industri Berkelanjutan Jurnal Ilmu Pendidikan Indonesia JOMPA ABDI: Jurnal Pengabdian Masyarakat Techno Jurnal Pengabdian Masyarakat Bhinneka Honai SAINTIFIKA Jurnal Teknik Kimia dan Lingkungan National Multidisciplinary Sciences Journal of Energy, Materials, & Manufacturing Technology Jurnal Pengabdian Masyarakat dan Riset Pendidikan Jurnal Teknologi Jnanadharma JURNAL REKAYASA KIMIA & LINGKUNGAN Journal of Engineering and Technological Sciences Jurnal Bioteknologi & Biosains Indonesia (JBBI) Edubiotik : Jurnal Pendidikan, Biologi dan Terapan
Joko Waluyo
Unknown Affiliation
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering 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 Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Techniques for Improving Genetic Algorithms in Solving Operating Room Scheduling Problems: An Integrative Review Yuniartha, Deny Ratna; Normasari, Nur Mayke E.; Waluyo, Joko; Masruroh, Nur Aini; Herliansyah, Muhammad Kusumawan
International Journal of Industrial Engineering and Engineering Management Vol. 6 No. 1 (2024)
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/ijieem.v6i1.8903

Abstract

Operating room scheduling is a complex process that involves various resources and takes the interests of many parties into consideration. The genetic algorithm is the frequently used metaheuristic algorithm to solve a large-size operating room scheduling problem. Many techniques have been developed to improve the genetic algorithms' performance in dealing with the operating room scheduling complexity. In this paper, we survey available literature to identify improvement techniques used at each stage of the genetic algorithm and capture the underlying problems. This review provides a mapping of improvement techniques in genetic algorithms correlating with the considered problems. The results can be employed by other researchers as a guide for future research in integrating a genetic algorithm or other population-based metaheuristic algorithm with a recent heuristic algorithm following the future directions of operating room scheduling research.
Application of Recycle System on a Cocoa Pod Husks Gasification in a Fixed-Bed Downdraft Gasifier to Produce Low Tar Fuel Gas Sunu Herwi Pranolo; Joko Waluyo; Jenni Prasetiyo; Muhammad Ibrahim Hanif
Jurnal Rekayasa Kimia & Lingkungan Vol 14, No 2 (2019): Jurnal Rekayasa Kimia & Lingkungan (December, 2019)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v14i2.14160

Abstract

Biomass gasification is potentially generating not only producer gas but also tarry components. Practically, the gas may substitute traditional fuel in an internal combustion engine after reducing the tar. This research examined a producer gas recycle system to reduce tar component of producer gas generated with cocoa pod husks gasification using air as gasifying agent in a fixed-bed downdraft gasifier. Cocoa pod husks feed sizes were +1 sieve, -1+ 0.5 sieve, and -0.5 sieve. The gasification process was operated at the temperature range of 491 940oC and at various gasifying agent volumetric rates of 62.84; 125,68; and 188.53 NL/min or at equivalent ratio range of 0.014 0.042. A recycle system of outlet producer gas to gasifier was set at volumetric rates of 0.139; 0.196; and 0.240 L/min. The performance of the system was evaluated with analyzing the tar component using gravimetric method of ASTM D5068-13, and the gas component of CO, H2, CO2 and CH4 compositions in producer gas were analyzed using Gas Chromatography GC-2014 Shimadzu sensor TCD-14. This recycle system succeeded in reducing tar content as much as 97.19% at 0.139 L/min of recycle volumetric rate and at biomass feed size of -1+0.5 sieve. The producer gas contained CO, H2, CO2 and CH4 of 23.29%, 2.66%, 13.30%, and 14.18% respectively. The recycle system cold gas efficiency was observed 65.24% at gasifying agent volumetric rate of 188.53 L/min and at biomass feed size of +1 sieve.
A REVIEW OF NANOCELLULOSE SYNTHESIS METHODS AND ITS APPLICATION Joko Waluyo
Jurnal Bioteknologi dan Biosains Indonesia Vol. 10 No. 1 (2023)
Publisher : BRIN - Badan Riset dan Inovasi Nasional

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Abstract

Nanocellulose is a type of cellulose that is being widely developed to replace petroleum-based polymers. This material possesses biocompatible properties, is abundant in nature, and is eco-friendly due to its biodegradability, sustainability, and non-toxic nature. Various nanocellulose synthesis methods are employed, including acid hydrolysis, alkaline, mechanical and biological treatments, as well as ionic liquid and deep eutectic solvent methods. The choice of synthesis method greatly influences the particle size and crystallinity of the resulting nanocellulose; hence further investigation is needed to determine the effectiveness of these methods. Nanocellulose finds applications in various fields, such as films, polymers, cosmetics, medical fuels, and energy storage. Among the different nanocellulose synthesis methods, ionic liquid and deep eutectic solvent (DES) methods have environmentally safe waste with better temperature, time, and diameter control compared to other methods. However, the DES method is currently preferred over the ionic liquid method due to the possibility of separating the lignin waste from the solvent.
Towards Effective and Fair Fisheries Law Enforcement: Efforts To Strengthen The Principle of Legal Certainty Waluyo, Joko
International Journal of Islamic Education, Research and Multiculturalism (IJIERM) Vol 6 No 2 (2024)
Publisher : The Islamic Education and Multiculturalism Foundation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47006/ijierm.v6i2.345

Abstract

This research discusses the authority to adjudicate fisheries criminal cases in the Republic of Indonesia State Fisheries Management area (WPPNRI) and the regulatory concept based on the principle of legal certainty. This research aims to analyze and discover the nature of the authority and regulatory concept for adjudicating fisheries criminal cases in Indonesia based on the principle of legal certainty. The method used in this research is a normative legal method using data collection techniques through literature study which are then analyzed through step-by-step descriptions of legal interpretation, systematization, evaluation, and legal argumentation. The research results show that the authority to adjudicate fisheries criminal cases at WPPNRI is absolute (absolute competence or attribution) to accept and decide fisheries disputes, and has relative authority (distribution or relative) based on the general court area. This regulatory concept is proposed by reconstructing Article 106 of the Fisheries Law so that the fisheries court becomes the only institution adjudicating fisheries cases. Establishing a fisheries court in each province is expected to end the dualism of authority and create legal certainty. Therefore, it's necessary to reconstruct Article 106 of the Fisheries Law by increasing the number of special fisheries courts, practitioners, and law enforcers to increase synergy between investigators and fisheries supervisors to protect fish resources and ensure their benefits for the welfare of the Indonesian people.
The Role of Pancasila Values in Facing the Future of Science Education Based on Artificial Intelligence Technology: A Philosophical Perspective Purmanna, Astrino; Hasanah, Rafiatul; Rofika, Rofika; Mahardika, I Ketut; Waluyo, Joko
International Journal of Education, Information Technology, and Others Vol 7 No 4 (2024): International Journal of Education, information technology   and others (IJEIT)
Publisher : Peneliti.net

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Abstract

This research aims to conduct a philosophical review of the role of Pancasila in facing the future of science education based on Artificial Intelligence technology. Given the application of Artificial Intelligence in science education continues to increase so that this can affect new opportunities in supporting the development of science education, learning innovation and present significant challenges. The type of research conducted is qualitative through library research. The results showed that the role of Pancasila ideology towards the application of Artificial Intelligence (AI) can act as an important ethical framework in facing the future of science education. The role of Pancasila as an ethical framework in the use of Artificial Intelligence in science education is to create the use of Artificial Intelligence technology that is more humane, fair, and has a positive impact on the world in general. Other results are detailed in this paper which include the potential and challenges that may arise in integrating the values of Pancasila as an ethical framework in the use of Artificial Intelligence in various fields, especially science education. Based on the findings of this research, it contributes to the view that the role of Pancasila in science education based on Artificial Intelligence technology needs to be understood through a philosophical perspective to ensure its relevance in the future.
Pemanfaatan Mesin Pencacah Plastik pada Bank Sampah di Salakan Bangunharjo Kabupaten Bantul Pratiwi, Yuli; Waluyo, Joko; Saputra, Hadi; Lestari, Nidia
DHARMA BAKTI Dharma Bakti-Vol 7 No 2-Oktober 2024
Publisher : LPPM IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/dharma.v7i2.4905

Abstract

Recycling is one way to manage plastic waste. If recycled, plastic waste in the form of bottles, glasses or other plastic waste has a fairly high selling value. The waste bank in Salakan Bangunharjo Bantul has been quite engaged in the plastic waste processing business. One of the activities of this waste bank is to collect and sort plastic waste from the community, but it has not been maximized because of space constraints and also does not have a plastic waste shredder. Therefore, the Abdimas Team from the Department of Environmental Engineering and Mechanical Engineering, Faculty of Engineering, AKPRIND University Indonesia, designed and made a plastic waste shredding machine. The method carried out is to conduct plastic waste management training through waste banks, the use and maintenance of plastic waste shredding machines and the delivery of plastic waste shredding machines. The purpose of this service activity is so that the waste bank in Salakan can carry out the plastic waste recycling process optimally, so that it can increase the economic value of the plastic waste. The capacity of this plastic waste shredder is 20 Kg/hour using a gasoline motor as a propulsion, and has specifications of 66 cm in length, 38.5 cm in width and 80 cm in height. Based on the results of the survey using questionnaires, this service activity can be said to be successful because community members, especially members and administrators of waste banks in Salakan, have become more aware of the benefits of plastic waste sorting, the operation and maintenance of plastic waste shredders, and positively assess and agree with this community service activity.
Correlation of Parent’s Educational Level and Learning Motivation on Thematic Learning Outcomes of Class VI Students of SD Negeri 1 Panjilor Wahid, Abdul; Waluyo, Joko; Farisi, Mohammad Imam
Edumaspul: Jurnal Pendidikan Vol 8 No 2 (2024): Edumaspul: Jurnal Pendidikan
Publisher : Universitas Muhammadiyah Enrekang

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Abstract

This research aims to determine the correlation between parental education level and learning motivation with thematic learning outcomes of class VI students at SD Negeri 1 Panji Lor. This research uses quantitative analysis methods. The subjects of this research involved 38 class VI students at SD Negeri 1 Panji Lor. The normality and homogeneity tests were carried out to produce a good sample. Data collection instruments include questionnaires and written tests. Before use, the instrument is tested for validity and reliability to ensure that the instrument can be used appropriately. Hypothesis testing using simple correlation. The research results report that (1) there is a positive correlation between the level of education and learning outcomes, (2) there is a positive correlation between the level of education and learning outcomes, (3) there is a joint positive correlation between the level of education and motivation towards learning outcomes.
PENERAPAN ENERGI TERBARUKAN DI KAWASAN WISATA LUMBUNG MATARAMAN DESA BENDUNG GUNUNGKIDUL Bakar, Syafriyudin Abu; Waluyo, Joko; Sholeh, Muhammad; Herry, Noordiana
Jurnal AbdiMas Nusa Mandiri Vol. 6 No. 2 (2024): Periode Oktober 2024
Publisher : LPPM Universitas Nusa Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33480/abdimas.v6i2.6067

Abstract

The community service activities carried out focus on the application of renewable energy in the Lumbung Mataraman tourism area, Bendung Village, Semin, Gunungkidul. The community service activities carried out are strategic steps in supporting a sustainable green economy. By utilising appropriate technology (TTG) in the form of solar panels and wind turbines, this area is expected to reduce dependence on fossil energy and increase operational energy efficiency. In addition, the tourism area has the potential to become an educational model on the use of renewable energy, both for local communities and tourists. The methods used in this research include qualitative and quantitative approaches. The qualitative approach was conducted through interviews with local stakeholders, such as tourism area managers, communities, and renewable energy experts. In addition, field observations were conducted to understand energy needs and the potential for implementing renewable energy technologies. The quantitative approach involved analysing current energy consumption data and calculating the potential of renewable energy that can be applied, such as solar panels and wind turbines. The results of the activities show that the implementation of renewable energy in Lumbung Mataraman can reduce dependence on fossil energy sources, lower carbon emissions, and provide additional economic benefits through energy cost savings and educational media in the use of renewable energy.
THE EFFECT OF VARIATION IN PREHEATING TEMPERATURE AND HADRFACING TREATMENT ON THE PHISYCAL AND MECHANICAL PROIPERTIES OF MEDIUM CARBON STEEL Basuki, Rio; Waluyo, Joko; Huda, Saiful; Lestari, Nidia
TRAKSI Vol 24, No 2 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

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Abstract

Welding is joining two or more metal parts by heating the metal until it melts and then adding material (electrode) to fuse like a complete object. The welding process on steel causes the metal around the weld area to experience changes in the thermal cycle, so before welding, providing preheating treatment with temperatures of 100°C, 150°C, and 200°C, then on the surface of the metal and to increase its hardness, a further process is carried out namely the hard facing process.   Hardfacing is a process where a harder material is applied to a parent material through welding. The hard-facing method is carried out by melting the HV-600 electrode wire on a plate until it obtains the desired thickness, resulting in a harder microstructural change on the metal surface. This research aims to determine the effect of preheating temperatures of 100°C, 150°C, and 200°C on the physical and mechanical properties of AISI 1040 steel material which is heat faced with HV – 600 electrodes in the Shield Metal Arch Welding process. The tests carried out in the research for physical properties were microstructure, and for mechanical properties were hardness and wear. The results of microstructure research at preheating temperatures of 100°C, 150°C, and 200°C, the magnitudes are 79.52%, 72.01%, and 68.56% respectively and the hardness values are 79.6 HRC, and 78 HRC respectively. and 75 HRC while the wear values are 0.0000587 m3/kg.m, 0.0000873 m3/kg.m and 0.0000917 m3/kg.m. From the results of this research, the optimum hardness and wear values are hard-facing with the preheating temperature of 100°C.
PERCEPTION OF TRAINING PARTICIPANTS ON GOOGLE SITES MEDIA IN LEARNING OF NATURAL SCIENCES Waluyo, Joko; Siregar, Tiurlina; Hotlan Samosir
Jurnal Ilmu Pendidikan Indonesia Vol 10 No 1 (2022)
Publisher : Master of Science Education Program, Postgraduate Program of Cenderawasih University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (524.263 KB) | DOI: 10.31957/jipi.v10i1.1929

Abstract

The purpose of this study was to determine the trainees' perceptions of the use of google sites in learning Natural Sciences. This study uses a survey method approach with a descriptive nature which aims to describe the circumstances or phenomena that occur. The data collection technique used is a questionnaire (questionnaire), which is a data collection technique carried out by giving a set of questions or a written statement to the respondent. The results of the study indicate that multimedia-based learning media training with google sites is very necessary for participants in online learning and is useful for participants to provide subject matter to students because the conten to ngoogle sites can be adapted to the needs of the learning process
Co-Authors Abdul Karim Zulkarnain Abdul Wahid Abil Fida Siskayanti Agus Imam Sonhaji Agustinus Winarno Akhmad F. Alhikami Akif Mahrus Ali Allam K, Muhammad Amalia Febryane Adhani Mazaya Anifah, Eka Masrifatus Anis Kristiani, Anis Ari Ariangga Orranius Putra Patarru Ari Diana Susanti, Ari Diana Arief Budiman Ariyadi, Hifni Mukhtar Bakar, Syafriyudin Abu Bambang Eko Afiatno Bambang Purwono Basuki, Rio Basworo, Agung Tri Bikorin Bikorin Dahlan, Irvan Damayanthy, Ramanda Ayu Damianus Mario Ricky Fernando Damianus Mario Ricky Fernando Daroini, Moch. Fauzun Deny Ratna Yuniartha Dinda Safitri Ramadhani Dodik Prakoso Eko Hery Suwandojo Dodik Prakoso Eko Hery Suwandojo Dwi Siswanta Edi Iskandar, Edi Edy Prayitno Eko Haryanto Eko Haryanto Ely Afridiana Kuncoro Ernawati, Kadek Lusi Fajar Y. Prabowo Ferhadius Endi Ferriawan Yudhanto Ganjar Andaka Gunawan Nugroho Hadi Saputra Hana Himatul ‘Aliyah Haris Puspito Buwono Hartono, Moh Hasan Albana Rhomadhon Hasanah, Rafiatul Hayatullah, Wahyu Herry Purwanti, Noordiana Herry, Noordiana Heru S. B. Rochardjo Hotlan Samosir Hudiyo Firmanto, Hudiyo I Ketut Mahardika Ibnu Singgih Pranoto Ikbar, Royhan Indah Retuwati Ramadhana Izzulhaq, Muhammad Ghozy Jenni Prasetiyo Johan Syafri Mahathir Ahmad Jumina Jumina Jussac Maulana Masjhoer Kamalia Fikri Kamalia Fikri Ketut Mahardika Kholiq Fadillah Amriansyah Kosmar Marojahan Damanik Kurnia, Irwan Kuswati Kuswati Lestari, Nidi Lestary, Septy Luthfiana Nurul Hidayati, Luthfiana Nurul Machida, Masato Mahda Mega Andyka Hieguyta Marausna, Gaguk Mardiana, Alif Margono Margono Mastini Michael Seen Mochammad Iqbal Mohammad Imam Farisi Mohammad Wildan Habibi, Mohammad Wildan Muhammad Farhan Abrar Muhammad Ibrahim Hanif Muhammad Kusumawan Herliansyah Muhammad Sholeh MUHAMMAD SHOLEH Muhammad Yusuf Muslim, Ilham Taufik Musyarofah Musyarofah, Musyarofah Nabila, Zahrani Putri Ndaru Pratama, Nico Nidia Lestari Noordiana Herry Purwanti Norman, Hafiz Nugroho Dewayanto Nur Aini Masruroh Nur Mayke Eka Normasari Nur Wahyudi Paryanto Paryanto Pazli, Pazli Prabang Setyono Pramudya Dwi Aristya Putra Pranolo, Sunu Herwi Purba, Ibnu Tryansar Purmanna, Astrino Putra, Ariadi Indra Putri, Rizqi Wulandari Putro, Firman Asto Qadarusman, Muhammad Luqman Rachmawati, Rr Yuliana Rahmat Bayu Raziq, Abdur Reza, Mutia Ridho Bayuaji Ridho Hantoro Rofika Rofika, Rofika Rony Arjuna Rosalinda, Julitha D Rosalinda, Julitha Dwi Saiful Huda Samuel Kristiyana Sapawe, Norzahir Sembodo, Bregas Siswahjono Tatag Septian, Ardie Setyowati Rahayu, Suparni Sidiq, Muhammad Fadel Simarmata, Henni Mariani Slamet Hariyadi Soepomo, Bambang Su Dar mono Subchan, Wahju Sudarmono Sudarmono Sugiyanto - Sugiyanto Sugiyanto Sunu Herwi Pranolo Suparni Setyowati Rahayu Sutrisno S Suwanto Raharjo Syafriyudin Syafryudin Tiurlina Siregar Totok R. Biyanto TRI ACHMADI Tri Haryanto Triyanto, Heru Agus Umi Fadilah, Umi Wahyu Wilopo Wahyu Wilopo Wicaksana, Hangga Yayuk Fatmawati, Yayuk Yehezkiel Steven Kurniawan Yonathan Ito Yudha, Venditias Yuli Pratiwi Yuli Pratiwi Yulinar Pramesti Cahyani Zaid Haidar Khairy Zainal Abdi