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Mechanical Properties of Epoxy Composite Reinforced with Spent Coffee Ground and Coffee Husk
Etanto Heiliano Wijayanto
; Imran, Al Ichlas
; Siregar, Januar Parlaungan
; Mohd Ruzaimi Mat Rejab
; Tezara Cionita
; Wisnu Prayogo
; Deni Fajar Fitriyana
; Rozanna Dewi
; Thomas Junaedi
; Agustinus Purna Irawan
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
This study aims to investigate the effect of increasing the concentration of natural filler on the mechanical properties of Spent Coffee Ground (SCG) / Coffee Husk (CH) reinforced epoxy matrix composite. The materials used in this study are epoxy resin as a matrix and waste coffee grounds and coffee husks as natural fillers with sizes of 100-mesh and concentrations of 10, 20, and 30 wt.%. The results showed that SCG 10 wt.% produced the best mechanical properties compared to the other samples ba...
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PEMBERDAYAAN KELOMPOK 'AISYIYAH DALAM PENCEGAHAN DAN PENANGANAN KEBAKARAN DI KECAMATAN KEDUNGTUBAN
Alfia Magfirona
; Nabil Belantara Kusuma
; Arinda Soraya Putri
; Fadhilla Tri Nugrahaini
; Tsulis Iq'bal Khairul Amar
; Syakir Maghfuri
; Mochammad Geraldy
; Indra Wahyu Nusantara
; Muhammad Ghofar Shidiq
; Nila Kusuma Ayu Lestari
Empowerment Journal
Vol 5
, No 2
(2025)
'Aisyiyah's group empowerment programme in Kedungtuban Sub-district, Blora Regency, was motivated by the high number of fires and the low disaster literacy of the community, especially women. This research aims to increase the community's capacity in fire prevention and management through an educative and participatory approach. The method used was a combination of participatory education and action research, which included socialisation, training, simulation and evaluation. The results of the a...
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Pendampingan Pengembangan Urban Farming Berbasis Pemberdayaan Masyarakat di Kelurahan Bukit Duri Jakarta Selatan
Jurnal Suara Pengabdian 45
Vol 4
, No 3
(2025)
Isu keterbatasan lahan di wilayah perkotaan mendorong perlunya solusi alternatif untuk mendukung ketahanan pangan dan pemberdayaan masyarakat. Kegiatan Pengabdian kepada Masyarakat (PkM) ini berfokus pada pengembangan urban farming di Kelurahan Bukit Duri dengan melibatkan kader TP PKK sebagai mitra utama. Tujuan pengabdian ini adalah meningkatkan pengetahuan teknis, keterampilan, serta kemandirian warga dalam memanfaatkan ruang mikro melalui sistem hidroponik dan pemanfaatan lahan vertikal maup...
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Mechanical Performance of Epoxy Composite Reinforced with Wood Dust and Crumb Rubber Waste
Imran, Al Ichlas
; Siregar, Januar Parlaungan
; Cionita, Tezara
; Fitriyana, Deni Fajar
; Anis, Samsudin
; Dewi, Rozanna
; Junaedi, Thomas
; Wijayanto, Etanto Heiliano
; Prayogo, Wisnu
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
The incorporation of wood dust and crumb rubber waste as filler in polymer matrix composite still requires in-depth evaluation of mechanical properties because they have different characteristics. This study evaluates the tensile, flexural, and hardness properties of epoxy composites reinforced with various fractions of wood dust and crumb rubber (5, 10, and 15%). The results showed that the composite with 5% crumb rubber produced the highest tensile strength of 15.52 MPa (CR5), while the highes...
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Enhanced Air Quality Prediction Using AI: A Comparative Study of GRU, CNN, and XGBoost Models
Kayam Saikumar
; Munugapati Bhavana
; Rayudu Prasanthi
; Singaraju Suguna Mallika
; Deepthi Kamidi
; Naveen Malik
; Kapil Joshi
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 3
(2025)
Weather monitoring is vital due to environmental changes and rising air pollution, which affects health and lifestyles. Accurate air quality prediction models are essential yet challenging due to complex weather-pollution interactions. This study employs explainable deep learning and machine learning techniques—GRU, CNN, and XGBoost—on a custom dataset of 100,000 samples with 15 features, including PM2.5, PM10, humidity, and temperature. Using SHAP for interpretability, the GRU model outperforms...
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Mechanical Performance of Alkali-Treated Rattan Strips with Epoxy Coating for Sustainable Composite Applications
Kalatharan, Sujentheran Nair
; Imran, Al Ichlas
; Irawan, Agustinus Purna
; Siregar, Januar Parlaungan
; Cionita, Tezara
; Fitriyana, Deni Fajar
; Anis, Samsudin
; Dewi, Rozanna
; Setyoadi, Yuris
; Wisnu Prayogo
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 3
(2025)
The use of natural materials like rattan in eco-friendly composites is gaining attention in materials engineering. However, its hydrophilic nature and interaction with other materials can affect mechanical strength. This study investigates how variations in rattan size and alkali treatment influence the tensile properties of single rattan strips through an epoxy dipping process. Rattan was prepared with varying lengths (5–15 cm), widths (3–8 mm), and a consistent thickness (0.5 mm). Alkali treat...
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Perbedaan Return Saham Sebelum dan Sesudah Stock Split Pada Perusahaan Indeks LQ-45 di BEI Periode 2019-2023
Jurnal Ekonomi, Bisnis dan Manajemen (EBISMEN)
Vol 4
, No 3
(2025)
This study aims to determine whether there is a significant difference in stock returns before and after stock splits among companies listed in the LQ-45 Index on the Indonesia Stock Exchange (IDX) during the 2019–2023 period. A stock split is a corporate action believed to provide a positive signal to investors. This research uses a quantitative approach with an event study method. The sample consists of 14 companies that carried out stock splits while being listed in the LQ-45 Index. Stock ret...
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Learning Through Screens: A Literature Review on the Role of Visual and Digital Media in Early Childhood Education
International Journal of Research in Education
Vol 5
, No 2
(2025)
The use of visual and digital media in early childhood education has emerged as a pedagogical response to technological advancements that demand innovation in the learning process. However, prior research often addresses fragmented aspects, such as specific tools or short-term effects, without offering a comprehensive synthesis. To address this gap, the present study systematically reviews the roles, effectiveness, challenges, and implementation strategies of visual and digital media in ECE. A d...
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Implementasi Algoritma Logistic Regression dalam Memprediksi Penyakit Jantung
Aritonang, Madhani Gokma Hot
; Parangin angin, Reynaldi Valentino
; Tambunan, Raymond Hosea
; Simatupang, Ronauli
; Siregar, Saut Dohot
Dinamik
Vol 30
, No 2
(2025)
Penyakit jantung merupakan salah satu penyakit dengan angka kematian tertinggi di negara maju bahkan dunia. Penyakit jantung dapat mengancam jiwa jika tidak ditangani dengan serius. Jumlah penderita penyakit jantung meningkat setiap tahunnya. Penyakit jantung dapat disebabkan oleh beberapa faktor, yang utama adalah konsumsi alkohol berlebihan, kebiasaan merokok, dan faktor keturunan. Penelitian ini bertujuan untuk memprediksi dan mencegah penyakit jantung sejak dini menggunakan algoritma pembela...
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Analisis Hubungan Faktor Risiko terhadap Peningkatan Kejadian Penyakit Paru Obstruktif Kronik (PPOK)
ASJN (Aisyiyah Surakarta Journal of Nursing)
Vol 6
, No 1
(2025)
Latar Belakang: Penyakit Paru Obstruktif Kronik (PPOK) merupakan salah satu penyakit paru dengan prevalensi tinggi dan menjadi penyebab lebih dari tiga juta kematian di seluruh dunia pada tahun 2015. Berdasarkan data rumah sakit, jumlah pasien PPOK di RS Emanuel Banjarnegara terus meningkat dari tahun ke tahun, yakni sebanyak 212 pasien pada 2019, 604 pasien pada 2021, dan 656 pasien pada 2023. Tujuan: Menganalisis faktor risiko yang berhubungan dengan peningkatan kejadian PPOK di RS Emanuel Ban...
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