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All Journal Jurnal Ilmiah Psikologi Terapan J@TI (TEKNIK INDUSTRI) Jurnal Rekayasa Sistem Industri Jurnal Sarjana Teknik Informatika CHEMICA Jurnal Teknik Kimia Jurnal Teknologi JISI UMJ (Jurnal Integrasi Sistem Industri UMJ) Jurnal Optimasi Sistem Industri Seminar Nasional Informatika (SEMNASIF) Jurnal Ilmiah Teknik Industri InfoTekJar : Jurnal Nasional Informatika dan Teknologi Jaringan Sistemasi: Jurnal Sistem Informasi JOIV : International Journal on Informatics Visualization PERFORMA : Media Ilmiah Teknik Industri Jurnal SOLMA Jurnal Sisfokom (Sistem Informasi dan Komputer) Conference on Innovation and Application of Science and Technology (CIASTECH) JUMANJI (Jurnal Masyarakat Informatika Unjani) Jurnal Teknologi Informasi dan Pendidikan Jurnal Ilmu Komputer dan Sistem Informasi (JIKOMSI) SPEKTA (Jurnal Pengabdian Kepada Masyarakat : Teknologi dan Aplikasi) Journal of Industrial and Engineering System Jurnal Abdi Masyarakat Indonesia Indonesian Community Journal Journal of Halal Science and Research Bulletin of Chemical Reaction Engineering & Catalysis Jurnal empower : jurnal pengembangan masyarakat Islam
Utaminingsih Linarti, Utaminingsih
Universitas Ahmad Dahlan
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry 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 Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Comparison of K-Medoids Method and Analytical Hierarchy Clustering on Students' Data Grouping Zahrotun, Lisna; Linarti, Utaminingsih; Suandi As, Banu Harli Trimulya; Kurnia, Herri; Sabila, Liya Yusrina
JOIV : International Journal on Informatics Visualization Vol 7, No 2 (2023)
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/joiv.7.2.1204

Abstract

One sign of how successfully the educational process is carried out on campus in a university is the timely graduation of students. This study compares the Analytic Hierarchy Clustering (AHC) approach with the K-Medoids method, a data mining technique for categorizing student data based on school origin, region of origin, average math score, TOEFL, GPA, and length study. This study was carried out at University X, which contains a variety of architectural styles. The R department, the S department, the T department, and the U department make up one of them. K-Medoids and AHC techniques Utilize the number of clusters 2, 3, and 4 and the silhouette coefficient approach. The evaluation's findings indicate a value. Although there is a linear silhouette between the AHC and K-Medoids methods, the AHC approach (departments R: 0.88, S: 0.87, T: 0.88, and U: 0.88) has a more excellent Silhouette value than K-Medoids (department R: 0.35, department S: 0.65 number of cluster 2, department T: 0.67 number of cluster 2 and program Study U: 0,52). The results of the second approach, which includes the K-Medoids and AHC procedures, are determined by the data distribution to be clustered rather than by the quantity of data or clusters. Based on this methodology, University X can refer to the grouping outcomes for the four departments with two achievements to receive results on schedule.
Penguatan Kapasitas Bumdes Desa Salam melalui Transfer Pengetahuan Desain Grafis dan Produk untuk Inisiasi Desa Wisata Linarti, Utaminingsih; Jamilatun, Siti; Zahrotun, Lisna
Jurnal Abdi Masyarakat Indonesia Vol 6 No 1 (2026): JAMSI - Januari 2026
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.2259

Abstract

BUMDes Pratama, Desa Salam, Kecamatan Salam, Kabupaten Magelang belum memiliki wawasan pengetahuan yang banyak mengenai pengelolaan usaha berbasis wisata, lingkungan maupun usaha berbasis sosial masyarakat yang diharapkan mampu mengoptimalkan perannya di Desa Salam sebagai unit pengelola usaha desa. Pendampingan pengelolaan usaha berbasis pada suatu potensi, terutama pengolahan sampah dan inisiasi desa wisata sangat diperlukan. Pengetahuan tentang desain grafis, desain produk dan media sosial diharapkan dapat mendukung terwujudnya desa wisata tersebut. Saat ini, BUMDes Pratama juga belum banyak memiliki pengetahuan dan praktek tentang desain grafis dan desain produk. Media sosial sebagai sarana promosi juga perlu diberikan untuk mendukung aktivitas rintisan desa wisata. Tujuan dari Pengabdian kepada Masyarakat (PkM) ini adalah memberikan transfer pengetahuan tentang desain grafis, desain produk serta media sosial guna mendukung terwujudnya usaha desa wisata. Metode yang diguakan dalam PkM ini adalah partisipatif. Langkah-langkah solusi yaitu: 1) Persiapan dan Koordinasi, 2) Persiapan bahan materi dan modul, 3) Pelaksanaan penyuluhan, 4)Pengukuran Level Pengetahuan, dan 5) Pendampingan dan Evaluasi. Terdapat tujuh kriteria pengukuran peningaktan level pengetahuan. Hasil PkM mampu meningkatkan level pengetahuan untuk kriteria pemahaman tentang desain grafis dan desain produk serta kegunaan keduanya dalam rintisan usaha. Rata-rata peningkatan level pengetahuan sebesar 80,95%.
Optimized Cobalt-Loaded Palm Oil Fuel Ash (Co/POFA) Catalyst for Syngas Production via Ethanol Dry Reforming Nordin, Mohamad Irfan; Ideris, Asmida; Azim Razat, Muhammad Shahim; Jamilatun, Siti; Pitoyo, Joko; Linarti, Utaminingsih; Ainirazali, Nurul
Bulletin of Chemical Reaction Engineering & Catalysis 2026: BCREC Volume 21 Issue 3 Year 2026 (October 2026) (Issue in Progress)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20662

Abstract

Converting biogenic carbon and captured CO₂ into synthesis gas (syngas) via ethanol dry reforming (EDR) offers a pathway to low-carbon fuels, but catalyst instability and coking remain key barriers. Palm-oil fuel ash (POFA), a silica-rich agro-industrial waste, was investigated in this study as a support material for cobalt loading and to evaluate its performance in EDR. Co/POFA catalysts containing 5-20 wt % Co was prepared by ultrasonic-assisted incipient wetness, calcined, and tested for EDR at 750 °C. Nitrogen physisorption, FT-IR, and post-reaction TGA were employed to correlate catalyst texture, surface chemistry, and thermal stability with ethanol and CO₂ conversion, as well as H₂ and CO yields.  Maximal, durable activity occurred at the intermediate Co loading (15 wt%), where ethanol and CO₂ conversions were ~72% and 80% initially and remained ~50% and 68% after 5 h, the ~48% H₂ yield was sustained, consistent with a loading that maximizes accessible Co sites without incurring mesopore transport limitations. Lower loading of 5 wt % Co was site-limited and heavily coked, whereas excessive loading of 20 wt % Co showed rapid deactivation attributed to pore blockage and cobalt agglomeration despite minimal coke. Optimizing cobalt dispersion on conditioned POFA enables stable syngas production under demanding EDR conditions, validating Co/POFA as a viable waste-derived catalyst for circular, CO₂-utilizing hydrogen generation. Copyright © 2026 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Pendampingan Pengelolaan Sampah Menuju Desa Peduli Sampah di Desa Semanu Kabupaten Gunung Kidul Alia Ariesta; Okka Adiyanto; Utaminingsih Linarti; Isana Arum Primasari; Endah Utami; Gita Indah Budiarti; Ika Dyah Kumalasari; Titisari Juwitaningtyas
Empower : Jurnal Pengembangan Masyarakat Islam Vol. 6 No. 1 (2021)
Publisher : UIN Siber Syekh Nurjati Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24235/empower.v6i1.9971

Abstract

Waste management is an important thing that needs to be resolved. The accumulation of garbage and the not yet managed urban and rural waste are one of the driving factors for this community service. Desa Semanu is one of the villages that already has a TPS-3R in Gunung Kidul Regency but the TPS-3R has not been utilized optimally. This study uses a qualitative method with community empowerment program. Aims for this research is to know the implementation of community empowerment programs. Furthermore, the purpose community service is to make Desa Semanu into a village that cares about waste by taking advantage of the integration of TPS 3R and a waste bank. One of the activities that have been carried out to support a village that cares about waste is by providing counseling about the dangers of burning waste to the environment and health. In addition, there was also counseling on the assistance of the Ahmad Dahlan University Center of Energy and Environmental Studies to make Desa Semanu can make a Waste Care Village. Based on the evaluation that has been carried out, most of the extension participants have increased their knowledge of solid waste knowledge.
Penentuan Rute Optimal Penyiraman Tanaman Kota Yogyakarta Menggunakan Genetic Algorithm Isdianto, Wuri; Linarti, Utaminingsih
Performa: Media Ilmiah Teknik Industri Vol 20, No 2 (2021): Performa: Media Ilmiah Teknik Industri
Publisher : Industrial Engineering, Faculty of Engineering, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/performa.20.2.52176

Abstract

Abstrak Penyiraman  tanaman merupakan salah satu  aktivitas yang harus dilakukan oleh DLH Kota Yogyakarta untuk menjaga dan memelihara kelestarian lingkungan hidup. Pemilihan  rute penyiraman harus optimal, agar menghemat biaya operasional kendaraan. Tujuan penelitian ini yaitu menyelesaikan permasalahn rute penyiraman tanaman Kota Yogyakarta menggunakan Genetic Algorithm  (GA). Fungsi tujuan pada penelitian ini untuk meminimalkan total jarak dan total waktu tertempuh. Penelitian ini berhasil menyelesaian permasalahan rute penyiraman tanaman Kota Yogyakarta di Sektor 3 dengan menggunakan GA dan mampu memberikan solusi rute dengan dengan hasil yang lebih baik daripada rute saat ini. Dengan menggunakan rute usulan, diperoleh total jarak tertempuh sejauh 80.220 meter dan total waktu penyelesaian sebesar 1.056 menit. Terjadi penurunan total jarak tempuh sebesar 11,94 % dan penurunan total waktu tertempuh sebesar 2,88 % terhadap rute saat ini. Kata kunci: Genetic Algorithm, DLH, Penyiraman Tanaman Abstract Watering plants is one of the activities that must be carried out by DLH Yogyakarta City to protect and preserve the environment. The selection of the watering route must be optimal, in order to save vehicle operating costs. The purpose of this research is to solve the problem of watering route for plants in Yogyakarta City using Genetic Algorithm (GA). The objective function in this study is to minimize the total distance and total time traveled. This study succeeded in solving the problem of the Yogyakarta City watering route in Sector 3 using GA and was able to provide route solutions with better results tan the current route. By using the proposed route,  the total distance covered is 80,220 meters and the total completion time is 1,056 minutes. There is a decrease in the total distance traveled by 11.94 % and a decrease in the total time traveled by 2.88% to the current route. Keywords: Genetic Algorithm, DLH, Watering Plants
Co-Authors Afdal, Zulfani Aflah Ainirazali, Nurul Alia Ariesanti Alia Ariesta Amalia Yuli Astuti Amanatullah, Yosyadi Rizkika Aminuyati Anggun Nindy Fatliana Anita Rahmawati Annie Purwani Armandi, Ekky Arum Buana Azim Razat, Muhammad Shahim Budiarti, Gita Indah Cahaya Annissa Fathonah Christian, Adhitya Rechandy Dicky Matura Sa'ban Dini Yuniarti Dwiyanti, Ryzky Aulia Ekky Armandi Endah Utami Endah Utami Feby Zarratina Hadi Fitriani, Syifa Gita Indah Budiarti Herri Kurnia Ideris, Asmida Ika Dyah Kumalasari Indah Budiarti, Gita Isana Arum Primasari Isdianto, Wuri Joko Pitoyo Jones, Anna Hendri Soleliza Juniarti, Rahmat Justi Aresta Kadengkang Kadengkang, Justi Aresta Kurnia, Herri Lisna Zahrotun Lisna Zahrotun Manik Mahacandra Medinah, Melati Muhammad Faishal Naniek Utami Handayani Nihanzah, Ardian Surya Putra Nordin, Mohamad Irfan Okka Adiyanto Rejeki, Marsudi Endang Sri Reni Dwi Astuti Sabila, Liya Yusrina Sangaji Agung Wicaksono Siti Jamilatun Soleliza Jones, Anna Hendri Soleliza Jones, Anna Hendry Suandi As, Banu Harli Trimulya Susanto Sudiro Titisari Juwitaningtyas Ulfa, Mulia Umi Tri Utami Yeyet Maryasa