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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 Empower : Jurnal Pengembangan Masyarakat Islam 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
Utaminingsih Linarti, Utaminingsih
Universitas Ahmad Dahlan
Agriculture, Biological Sciences & Forestry Arts 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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Preventive Maintenance Analysis Using Monte Carlo Simulation and Failure Mode and Effect Analysis (FMEA) Afdal, Zulfani Aflah; Linarti, Utaminingsih
Jurnal Ilmiah Teknik Industri Vol. 22, No. 2, December 2023
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v22i2.21900

Abstract

Filter - 2321 is one of the critical components in the production department III A phosphoric acid plant of PT Petrokimia Gresik. Critical components mean that if the filter-2321 is damaged, the production process will stop (Shutdown). Filter-2321 is the highest damaged component that affects the production process is stopped, therefore this study was conducted in order to analyze the causes of failure and improve the value of reliability by using monte carlo and FMEA simulation methods. The first step is to calculate the actual reliability value to determine the effectiveness of the maintenance system that has been implemented by the company. Furthermore, monte carlo simulation reliability simulation and determine the preventive maintenance interval, thus increasing the reliability of the filter-2321. FMEA is used to analyze the cause of the damage and determine the RPN (risk priority number) in failure mode. the results of this study is the value of the actual reliability of the filter-2321 of 30.8264% with MTBF of 1050.99 hours, this value is still too far from the value of the reliability of SII (Indonesian industrial standard) of 70%. The result of RPN (Risk Priority Number) assessment obtained from failure mode and effect analysis is, that the highest value is found in the damaged torque module of 135 and failure mode bearing fix damaged of 135. The suggestion to increase the reliability value is to perform preventive maintenance at intervals of 438.60 hours to increase the reliability value, taking into account the results of the analysis of the causes of the damage that occurred using FMEA.
Behavioral model modification theory of planned behavior considering factors of religiosity and awareness of purchasing halal cosmetics: a case study in yogyakarta Linarti, Utaminingsih; Ulfa, Mulia
Journal of Halal Science and Research Vol. 2 No. 2 (2021): September
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (704.779 KB) | DOI: 10.12928/jhsr.v2i2.1898

Abstract

The assurance of the certainty of halal products needs to be considered, given the large Muslim population. Currently, the use of cosmetics is part of the main needs, this is indicated by the increasing growth rate of cosmetic sales in Indonesia. The behavior of purchasing cosmetic products with guaranteed halal product certainty is interesting to note. We can discuss the magnitude of the influence between product needs, religious principles, concerns, intentions, and behavior of Muslim consumers. The purpose of this study was to determine the factors that influence consumer intentions and behavior in buying halal cosmetic products using a modification of the Theory of Planned Behavior (TPB) model by considering the factors of religiosity and awareness. The results showed that attitudes, subjective norms, perception control, and religiosity had a positive and significant influence, while the awareness factor was not significant on consumer intentions to buy halal cosmetic products. While the intention has a positive and significant effect on the behavior of buying halal cosmetics.
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.
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).
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%.
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 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 Wuri Isdianto Yeyet Maryasa