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Performance Optimization of a Petrochemical Cooling Tower via Fill Replacement: Cleanflow vs Cleanflow Plus
This study investigates the performance improvement of an induced draft, counterflow cooling tower after replacing the existing Cleanflow fill with Cleanflow Plus. One cell (E) was upgraded while four cells (A–D) served as the baseline under CTI ATC-105 procedures. Measurements included outlet temperature, wet-bulb temperature, circulation flow, and fan power. Results show that Cell E achieved a higher cooling range (9.20°C vs. 8.63°C average) and a lower approach (6.29°C vs. 6.87°C average). He...
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Effect of Printing Speed on the Properties of 3D Printed Products Using Recycled PET Filament
Fitriyana, Deni Fajar
; Agung Efriyo Hadi
; Nugroho Suhodo
; Aldias Bahatmaka
; Januar Parlaungan Siregar
; Tezara Cionita
; Zuhriyan Ash Shiddieqy Bahlawan
; Achmad Yanuar Maulana
Recycled PET has been widely studied for its potential use in 3D printing applications. However, few research has examined how printing speed affects recycled PET filament products' mechanical and physical qualities. This research examines how printing speed influences the physical and mechanical qualities of 3D-printed PET filament goods created from mineral water bottle trash. In this study, filament fabrication is carried out using the homemade pultrusion machine, then the filament is used fo...
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Pengelolaan Sampah Tingkat Rumah Tangga Melalui Bank Sampah
Dhaningtyas, Shalihat Afifah
; Kristini, Tri Dewi
; Nursetia, Cantika Dwi
; Astiah, Delfika Dwi
; Anggara, Muhammad Surya
; Wibowo, Aditia Fajar Putra
Jurnal Inovasi dan Pengabdian Masyarakat Indonesia
Vol 5
, No 2
(2026)
Latar belakang: Peningkatan jumlah penduduk dan bangunan mengakibatkan peningkatan jumlah konsumsi barang yang dapat menghasilkan sampah TPS (Tempat Pembuangan Sementara). Sampah di sekitar permukiman penduduk sudah tidak mampu lagi menampung volume sampah yang terus meningkat. Tujuan: mengetahui peningkatan pengetahuan warga tentang pengelolaan sampah tingkat rumah tangga. Metode: metode yang digunakan yaitu observasi dengan ceramah, praktik langsung, dan mengerjakan soal pre-test dan post-test...
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Pendampingan Aktivitas Fisik bagi Anak Usia Dini untuk Mencegah Sedenteri
Dhuha, Ahad Agafian
; Yogaswara, Andre
; Muhibbi, Muhammad
; Widodo, Agung
; Abubakar, Sayid Fariz Bin Seh
; Firdaus, Mohammad Fajar
Jurnal Inovasi dan Pengabdian Masyarakat Indonesia
Vol 5
, No 2
(2026)
Latar belakang: Tingginya durasi screen time dan rendahnya aktivitas fisik anak usia dini mengakibatkan berbagai penyakit dan gangguan perkembangan motorik pada anak. Kurangnya aktivitas fisik berpengaruh terhadap keterlambatan gerak seperti berjalan dan keterlambatan bicara. Pemberian handphone dalam jangka waktu lama dan kurangnya stimulus oleh keluarga merupakan salah satu penyebab utama terjadinya berbagai gangguan kesehatan dan perkembangan pada anak. Kurangnya aktivitas fisik, tingginya a...
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Pembuatan Dan Penerapan Pupuk Organik Cair (Kocor) di Kebun Lordes Dalam Upaya Meningkatan Pertumbuhan Tanaman Melon (Cucumis melo L.)
Bria, Deseriana
; Mamo, Wenselaus
; Aja, Lorensius Yustianus
; Ndua, Natalia Desy Djata
; Naisali, Hyldegardis
; Tay, Delviana
; Naitili, Alexandria
The study aimed to develop and apply liquid organic fertilizer (kocor) in Lordes Farm to improve the growth and productivity of melon (Cucumis melo L.). The production of liquid fertilizer was carried out through fermentation using brown sugar, EM4, humic acid, and urea as nutrient sources, producing a nutrient-rich liquid suitable for soil application. The application was conducted by drenching the fertilizer around the root zone at regular intervals. The results showed that liquid organic fert...
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Effect of Different Layers on the Performance of Laminate Epoxy Composite Reinforced with Textile Waste
Thomas Junaedi
; Siregar, Januar Parlaungan
; Zalani, Mohamed Reza
; Imran, Al Ichlas
; Tezara Cionita
; Endah Murtiana Sari
; Deni Fajar Fitriyana
; Etanto Heiliano Wijayanto
Post-consumer textile waste poses significant environmental problems, but its potential for commercial recycling remains under-researched. Therefore, this study utilizes calico textile (CT) waste as reinforcement in polymer composites. The effect of layering number of CT in epoxy composite will be investigated. CT was varied with three layers, namely 1, 3, and 5 embedded in epoxy resin with the hand lay-up method in open molding. The mechanical testing of pure epoxy as a control point for tensil...
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Attention-Augmented GRU for Stock Forecasting: A Trade-Off Between Directional Accuracy and Price Prediction Error
R. Daniel Hartanto
; Guruh Fajar Shidik
; Farrikh Alzami
; Ahmad Zainul Fanani
; Aris Marjuni
; Abdul Syukur
Journal of Computing Theories and Applications
Vol 3
, No 4
(2026)
Attention mechanisms have been widely incorporated into recurrent neural network architectures for financial time series forecasting, with most prior work reporting improvements in price-level error metrics. This study revisits that claim through a controlled empirical comparison of four deep learning architectures on nearly two decades of Telkom Indonesia (TLKM) closing price data from the Indonesia Stock Exchange (IDX). The models evaluated are a three-layer Gated Recurrent Unit (GRU) baseline...
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PHYSICAL CHARACTERISTICS OF WHITE BREAD WITH VARIOUS LEVELS OF PURPLE SWEET POTATO FLOUR SUBSTITUTION
Ifadah, Raida Amelia
; Putri, Diwyacitta Antya
; Lukitasari, Febriani
; Handajani, Sri
; Nurlaela, Luthfiyah
; Nugraheni, Fitriana
Agrisaintifika : Jurnal Ilmu - Ilmu Pertanian
Vol 10
, No 1
(2026)
This study evaluated the effect of wheat flour substitution with purple sweet potato flour on the physical characteristics of white bread. The experiment was conducted using a Completely Randomized Design with a single factor, namely the level of purple sweet potato flour substitution at 0%, 15%, 30%, 45%, and 60%. The physical parameters analyzed included color (L*, a*, b*), texture (firmness), porosity, and dough expansion.The results showed that increasing levels of purple sweet potato flour...
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EVALUATION OF THE IMPACT OF STARTER CULTURE DIFFERENTIATION ON CHEESE SENSORY PROFILE
Agrisaintifika : Jurnal Ilmu - Ilmu Pertanian
Vol 10
, No 1
(2026)
This study evaluated the effect of different starter cultures on the organoleptic quality of cow’s milk cheese. Three starters — Rennet Qso (tablet), Rennet Nabati (powder), and Rennet (Khomiiratul Jibni) were tested at 1% concentration. A Completely Randomized Design with four treatments and four replications was employed. Organoleptic parameters (color, taste, aroma, texture, overall liking) were evaluated by 20 panelists using a 1–5 hedonic scale. Data was analyzed by ANOVA and Duncan’s test....
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PEMBERDAYAAN IBU-IBU PKK MELALUI EDUKASI DAN SOSIALISASI BANK SAMPAH BERBASIS MASYARAKAT
Puspita, Maria Entina
; Nurrahmawati, Dwi
; Hidayat, Fajar
; Krisnadwiva, Krisnadwiva
; Puspita, Maria Entina
Perwira Journal of Community Development
Vol 6
, No 1
(2026)
This activity aims to provide education and socialization of community-based waste management through waste banks to PKK group mothers in RT 15 RW 5 Kutowinangun Lor, Tingkir, Salatiga City. Education and socialization activities are carried out through presentations by speakers from the Salatiga Waste Bank (BSI), as well as discussions and simulations. The target of this Community Service activity is the PKK group mothers in RT 15 RW 5 Kutowinangun Lor, Tingkir, Salatiga City. Through this educ...
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