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Loading-Dependent Physicochemical Characteristics of LiMn2O4 Composites with Plasma-Modified and Ammonia-Functionalized Rice Husk Carbon
Harianingsih, Harianingsih
; Deni Fajar Fitriyana
; Januar Parlaungan Siregar
; Agung Budiwirawan
; Ari Dwi Nur Indriawan
; Suryo Wiroyudho Wibowo
; Rizky Ilham Fadzillah
; Nabila Khoirunisa
This study investigates LiMn2O4 composites incorporated with nitrogen-functionalized rice husk-derived carbon as a sustainable secondary phase for cathode material development. Rice husk carbon was prepared through carbonization, acid-assisted activation, plasma treatment, and ammonia functionalization, then mechanically blended with LiMn2O4 at 2, 3, and 4 wt.% to obtain LMO-NC2, LMO-NC3, and LMO-NC4, respectively. FTIR analysis showed absorption bands at approximately 3390, 1625, 1400, 1008, 83...
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ANALISIS KEBUTUHAN MEDIA SOSIALISASI PENDIDIKAN PEMILIH BAGI PENYANDANG DISABILITAS UNTUK MENINGKATKAN PARTISIPASI POLITIK DI KABUPATEN BANTUL
Siregar, Nailan Sofiah
; Program Studi Ilmu Komunikasi, Fakultas Ekonomi, Ilmu Sosial dan Humaniora, Universitas 'Aisyiyah Yogyakarta, Yogyakarta
; Muhazir, Alfian
; Program Studi Ilmu Komunikasi, Fakultas Ekonomi, Ilmu Sosial dan Humaniora, Universitas 'Aisyiyah Yogyakarta, Yogyakarta
; Kusumo, Herlambang Jati
; Program Studi Ilmu Komunikasi, Fakultas Ekonomi, Ilmu Sosial dan Humaniora, Universitas 'Aisyiyah Yogyakarta, Yogyakarta
Aguna: Jurnal Ilmu Komunikasi
Vol 7
, No 2
(2026)
Berdasarkan data rekapitulasi partisipasi pemilih penyandang disabilitas yang dihimpun Komisi Pemilihan Umum (KPU) Kabupaten Bantul pada Pemilu 2024, tingkat partisipasi pemilih penyandang disabilitas tercatat hanya berkisar 32,42–33,00% untuk seluruh jenis pemilu, jauh di bawah target partisipasi pemilih penyandang disabilitas yang ditetapkan KPU sebesar 85–100%. Rendahnya angka tersebut diduga berkaitan dengan belum terpenuhinya kebutuhan media sosialisasi pemilih pendidikan yang sesuai dengan...
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Analysis of Factors Related to Safety Riding in Employees of the Karangmalang Health Center in Semarang City in 2025.
Journal of Occupational Health, Hygiene and Safety
Vol 4
, No 1
(2026)
Traffic accidents are still a public health problem, especially for motorcycle users in the productive age group. This study aims to analyze factors related to safety riding behavior in employees of the Karangmalang Health Center in Semarang City. This study is a quantitative analysis with a cross-sectional design on 45 respondents who were taken in total sampling. Independent variables include age, working period, use of PPE, road environmental conditions, and family support, while...
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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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Overview and Risk Factors of Hypertension in Students at SMPN 35 Semarang
Mulia Nugroho, Muhammad Raffa
; Aldina, Azhar Tegar
; Aulya, Dwi Natasya Rahma
; Rubinem, Rubinem
; Muthoharoh, Nor Amalia
VISIKES
Vol 25
, No 1
(2026)
Hypertension is one of the main risk factors for cardiovascular disease, which has long been associated with adulthood, but in recent years it has been increasingly found in adolescents. This condition is a major concern because hypertension in adolescents is often asymptomatic and has the potential to continue into adulthood. This study aims to describe the incidence of hypertension and its risk factors at SMPN 35 Semarang. This study aims to describe the prevalence of hypertension and its risk...
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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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Narasi Green Development dalam Kebijakan Hilirisasi Nikel Indonesia: Analisis Wacana Kritis atas Kebijakan dan Kontestasi Makna
Jurnal Riset sosial humaniora, dan Pendidikan (Soshumdik)
Vol 5
, No 1
(2026)
This study analyzes the construction and contestation of the “green development” narrative within Indonesia’s nickel downstreaming policy, particularly in the Sulawesi region. Using a Critical Discourse Analysis (CDA) approach, the study examines how the state and corporations form a discursive coalition that dominates the policy space, as well as how counter-narratives from civil society critique the social and ecological impacts of mining expansion. The findings show that the dominant narrativ...
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Analisis Keterampilan Teknik Dribbling dan Kontrol Bola dalam Permainan Sepak Bola pada Siswa SMK Methodist Tanjung Morawa
Jendela Olahraga
Vol 11
, No 01
(2026)
Penelitian ini dilatar belakangi oleh rendahnya penguasaan teknik dasar sepak bola, terutama dribbling dan kontrol bola, pada siswa yang mengikuti kegiatan ekstrakurikuler sepak bola di SMK Methodist Tanjung Morawa. Keterampilan dasar tersebut sangat penting karena menjadi fondasi utama dalam permainan sepak bola yang efektif, namun kenyataannya banyak siswa yang belum mampu menampilkan teknik dasar dengan baik sehingga berdampak pada performa dan pencapaian prestasi. Tujuan dari penelitian ini...
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Enhancing Paragraph Completeness through MASS-MISS Technique in EFL Academic Writing Instruction
ETERNAL: English Teaching Journal
Vol 17
, No 1
(2026)
This research aims to investigate the impact of targeted instructional technique on students' paragraph writing abilities. The primary objective is to determine whether implementing Major Supporting Sentence (MASS) and Minor Supporting Sentence (MISS) techniques can significantly enhance the completeness of students' paragraph writing. The research employs a pre-experimental design, involving a one-group pre-test and post-test approach to assess the effectiveness of the treatment. Initially, stu...
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