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All Journal Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Physical Therapy Journal of Indonesia
Lilik Dwi Setyana
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Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Public Health

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Studi Ukuran Grafit Besi Cor Kelabu Terhadap Laju Keausan Pada Produk Blok Rem Metalik Kereta Api Lilik Dwi Setyana
Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Vol 1, No 1 (2015)
Publisher : Departemen Teknik Mesin, Sekolah Vokasi, Universitas Gadjah Mada.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.339 KB) | DOI: 10.22146/jmtp.v1i1.12258

Abstract

Blok rem kereta api yang diproduksi di Ceper Klaten Jawa Tengah menggunakan besi cor kelabu.  Permasalahan yang sering dijumpai adalah ketahanan terhadap gesekan yang kurang baik sehingga mempengaruhi lama waktu penggunaanya, namun jika kekerasan blok rem tersebut terlalu tinggi maka roda kereta api yang akan lebih cepat aus.Penelitian  dilakukan dengan mengidentifikasi 20 blok rem kereta api yang dinyatakan lolos uji dan tidak lolos uji dari tingkat kekerasannya, kemudian diamati struktur mikronya. Kemudian diambil 5 spesimen dengan besar grafit yang berbeda. Pengujian yang dilakukan meliputi uji kekerasan, uji keausan dan pengamatan struktur mikro.Hasil penelitian menunjukkan bahwa kekerasan tertinggi (207 BHN) terjadi pada spesimen 1 dengan ukuran grafit terkecil sedangkan kekerasan terendah (113 BHN) terjadi pada spesimen 5 dengan ukuran grafit terbesar. Laju keausan terendah (2,1.10-4 mm3/kg.m) terjadi pada spesimen 5 dengan ukuran grafit terbesar (laju keausan turun hingga 76% dari spesimen 1). Sedangkan berdasar pengamatan struktur mikro, ukuran grafit dengan panjang rata-rata  40 hingga 70 µm dan lebar rata-rata 5 µm mempunyai nilai kekerasan standar untuk blok rem (175 hingga 197 BHN).
Development of therapy aids with electromyography technology for post-stroke patients Budi, Savitri Citra; Budi Sumanto; Lilik Dwi Setyana; Prima Asmara Sejati; Siti Alimah
Physical Therapy Journal of Indonesia Vol. 6 No. 2 (2025): Inpress July-December 2025
Publisher : Universitas Udayana dan Diaspora Taipei Medical University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51559/ptji.v6i2.319

Abstract

Background: The prevalence of stroke in Indonesia has been increasing and has had a significant impact on individuals, families, and society. There is a pressing need for innovative assistive devices that support independent therapy and enhance patient motivation to improve post-stroke productivity. This study aimed to design and develop a post-stroke rehabilitation assistive device utilizing electromyography (EMG) technology. Methods: This study employed a research and development (R&D) design. Data were collected through documentation studies, interviews with physiotherapists, observations, and focus group discussions (FGDs). A documentation study was conducted using the medical records of stroke patients. Interviews were conducted with physiotherapists, and observations were carried out to understand patients’ therapeutic activities. Results: This study provided alternative therapy by developing post-stroke rehabilitation aids with EMG technology. Based on the documentation study, 88% of patients experienced ischemic stroke with a good level of consciousness (E4V5M6), indicated by the Glasgow Coma Scale (GCS) score of 15. Conclusion: This phenomenon supported the development of electrical therapy innovations to accelerate stroke recovery. This study successfully designed a hand therapy device using EMG technology to improve patients’ motor function, particularly among those with E4V5M6 levels of consciousness and limited motor skills.
Co-Authors Budi Sumanto Prima Asmara Sejati Savitri Citra Budi Siti Alimah