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Sugeng Santoso
Universitas Widya Dharma
Astronomy Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

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Penggunaan Keping Compact Disc (CD) sebagai Kisi Difraksi untuk Menentukan Indeks Bias Zat Cair Rossy Lydia Ellyana; Sugeng Santoso
Jurnal Teori dan Aplikasi Fisika Vol. 12 No. 02 (2024): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v12i02.395

Abstract

Research on the use of compact disc (CD) chips as a diffraction grating to determine the refractive index of liquids aims to determine the value of the refractive index of liquids through the diffraction lattice constants of compact disc (CD) chips, both filled with data and not filled with data. The sample used in this study was pure water (aquadest). The research method begins with making lattice holders, supports, liquid containers and cleaning the CD layer. The lattice constant of the CD is determined by irradiating the CD with an air medium using a laser light source and a dark-bright (diffraction) pattern appears on the screen. Measurement of the distance from the central slag to the light was first measured using a paper scale that had been attached to the screen, then analyzed using a weightless linear regression equation on Microsoft Excel. Measurements were made by varying the lattice distance to the observation screen. The same method is carried out in pure water medium (aquadest). Based on the results of these measurements, the refractive index value of pure water (aquadest) for the red laser pointer on an empty data CD is (1.29 ± 0.04) and on a full data CD is (1.40 ± 0.05). Meanwhile, the refractive index value of pure water (aquadest) for the green laser pointer on an empty data CD is (1.31 ± 0.08) and on a full data CD is (1.38 ± 0.08). Keywords: Diffraction Grating, Compact Disc (CD), Linear Regression, Aquadest Refractive Index.
Analisa Performa Motor Hy-2750b, Motor Mg995, Motor Ds3225mg, dan Motor 24h2a4428 sebagai Penggerak Portable Continuous Passive Motion (CPM) I Wayan Angga Wijaya Kusuma; Sugeng Santoso
Elektrika Vol. 15 No. 1 (2023): April 2023
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/elektrika.v15i1.6362

Abstract

Continuous Passive Motion (CPM) is a therapeutic tool to assist patients in moving their joints after the patient has experienced trauma or underwent joint surgery. The CPM machine is used to avoid joint stiffness in the patient. Joint stiffness can be caused because patients who have undergone joint surgery are reluctant to move their joints due to pain. The design of the CPM machine that will be carried out has motion in flexion and horizontal abduction. The choice of the type of DC motor as the driving force for the CPM machine will determine the ability (performance) of the CPM in carrying out the rehabilitation process for postoperative knee fractures. Movements in restoring and improving the range of motion of the elbow are flexion movements, extension movements, pronation movements and supination movements. From the results of the study, it can be concluded that there is one motor that meets the standards that can be used as a driving motor for Portable Continuous Passive Motion (CPM), namely the HY-2705B type motor. The HY-2705B motor meets minimum standards in terms of motor torque, motor rotation angle, working voltage, motor working temperature, and motor weight. For the other three motors Motor MG995, Motor 24H2A4428, and Motor DS3225MG there is one standard that is not met.     Keywords: Continuous Passive Motion, CPM, Fracture, HY-2705B, MG995, 24H2A4428, DS3225MG ABSTRAK  Continuous Passive Motion (CPM) merupakan alat terapi untuk membantu pasien dalam menggerakkan sendi setelah pasien mengalami trauma atau menjalani operasi sendi. Mesin CPM digunakan untuk menghindari terjadinya kekakuan sendi pada pasien. Kekakuan sendi dapat disebabkan karena pasien yang telah menjalani operasi sendi enggan menggerakan sendinya akibat rasa nyeri. Perancangan mesin CPM yang akan dilakukan memiliki gerak secara fleksi dan horisontal abduksi. Pemilihan jenis motor DC sebagai penggerak mesin CPM sangat menentukan kemampuan (performa) CPM dalam melakukan proses rehabilitasi fraktur lutut pasca operasi. Gerakan-gerakan dalam mengembalikan dan memperbaiki lingkup gerak siku tangan adalah gerakan flexion, gerakan extention gerakan pronation dan gerakan supination. Dari hasil penelitian dapat disimpulkan bahwa terdapat satu motor yang memenuhi standar yang dapat digunakan sebagai motor penggerak untuk Portable Continuous Passive Motion (CPM) yaitu motor jenis HY-2705B. Motor HY-2705B memenuhi standar minimal baik dari torsi motor, sudut putar motor, tegangan kerja, suhu kerja motor, maupun berat motor. Untuk tiga motor yang lain Motor MG995, Motor 24H2A4428, dan Motor DS3225MG ada salah satu standar yang tidak terpenuhi.
Co-Authors I Wayan Angga Wijaya Kusuma Rossy Lydia Ellyana