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All Journal BERKALA FISIKA SAINS DAN MATEMATIKA YOUNGSTER PHYSICS JOURNAL JITEK (Jurnal Ilmiah Teknosains) Indonesian Journal of Chemistry Journal of Physics and Its Applications Cendekia Journal of Pharmacy
Heri Sugito
Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University, Jl. Prof. Soedharto, SH., Tembalang, Semarang 50275, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Veterinary

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Journal : YOUNGSTER PHYSICS JOURNAL

 1 
Metode polarisasi transmisi untuk deteksi cemaran lemak babi pada minyak goreng Nidia Kharisma Putri; Ketut Sofjan Firdausi; Heri Sugito
Youngster Physics Journal Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

This study was conducted to search for "fingerprint" of the existence of lard in vegetable  oil contaminated by lard as an evaluation of the halal of cooking oil by using transmission polarization method. The sample used was palm oil that has been mixed with chicken oil and lard. The light source used was green laser with wavelenght 532 nm. Measurement was conducted based on change of polarization transmission angle, with addition of external electric field produced by two parallel plates connected to 0-6kV DC voltage. The result shows that contaminated palm oil has greater polarization angle changes than pure palm oil. And  palm oil that has been contamined by lard has the greatest polarization angle than a pure palm oil and palm oil contaminated by chicken oil. Transmisson polarization method can be used to evaluate halal of cooking oil.Keywords: Polarization, Electrooptics,Cooking oil, Halal
Aplikasi gelombang ultrasonik untuk pengukuran tingkat kekasaran permukaan beton Heri Sugito; Diana Layla Riskawati
Youngster Physics Journal Vol 6, No 2 (2017): Youngster Physics Journal April 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The measurement of surface roughness level of matter was done by ultrasonik wave Time-of-Flight methode. The device can be applied to several equirement, such as roughness detection for textile product, sandpaper,asbestos, ceramics, steel and metal industry, etc. The measurement is needed for quality product improvement.  The measurement performed by scanning object which rotated 200 times with stepper motor using ultrasonic transduser. The transduser transmit pulse to object trough transmitter and receiver pulse. The result of scanning displayed in Cathode Ray Osciloscop (CRO) then it used to estimating ToF (Time-of-Flight) by calculating the gap between transmitter pulse and receiver pulse. The objects which measured are tree trunk, concrete A, and concrete B. The reason of selecting the test object is for minimize the atenuation so it can increase the reflection. The result of measurement for average surface roughness of objects are: tree trunk (Ra is minimum 8%, and Ra is maximum 17%), concrete A (Ra is minimum 10%, and Ra is maximum 16%), and concrete B (Ra is minimum 8%, and Ra is maximum 17%).Keywords: surface Roughness, ultrasonic wave, Time-of-Flight
Co-Authors A Husna, A Abdul Rofiq Ali Khumaeni Ari Bawono P Ari Bawono Putranto Asep Yoyo Wardaya Azzahroh, Muffaricha Diana Layla Diana Layla Riskawati Dro Dwi Lego Dwi Satoto Eko Hidayanto I. Afiefah Izzah Afiefah K Sofjan Firdausi K. Sofjan Firdausi K. Sofjan Firdausi K. Sofjan Firdausi Ketut Sofjan Firdausi, Ketut Sofjan Kiichiro Kagawa Lilik Eko Jatwiyono Much Azam Much. Azam Muchammad Azam, Muchammad Mujasam Mujasam N Kharisma Putri, N Kharisma Nasrullah Idris Nidia Kharisma Putri Nidia Kharisma Putri Nurhasanah, W Dewi Nurhasanah, Wahidatun Dewi Nyadaniati Simbolon Qidir Maulana Rahmawati, Aidah Ria Amitasari Ririn Widya Septianti Setyoningrum, Aqilatul F.D. Soesanto, Qidir M.B Soesanto, Qidir Maulana Binu Sri Murni Suryono Suryono Syifa Azahra Tiwiyaningsih, Tiwiyaningsih Very Richardina Very Richardina Wahyu Setia Budi Wardono Istiyawan Y Indriyani, Y Yulianti Eva, Yulianti