Article Per Year (5 Year)
p-Index From 2021 - 2026
0.61
P-Index
This Author published in this journals
All Journal Indonesian Applied Physics Letters
Kawitana, Welina Ratnayanti
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Electrical & Electronics Engineering Materials Science & Nanotechnology Physics

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
Arm Cycle Ergometer Electro-Mechanical System Design For Post-Stroke Medical Rehabilitation Kristanto, Yosua Hendra; Kawitana, Welina Ratnayanti; Prijo, Tri Anggono
Indonesian Applied Physics Letters Vol. 2 No. 1 (2021): Indonesian Applied Physics Letters - June 2021
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v2i1.28298

Abstract

This study was done to make the electro-mechanical arm ergometer cycle system used as post-stroke patient physiotherapy. The management system was expected to set the rotary frequency according to the therapeutic needs. To set the frequency of the rotation, the PID control with rotation sensor was used as feedback. The rotating sensor used consisted of the optocoupler and a rotary encoder. Based on the research that has been done, obtained constants of Kp = 0055, Ki and Kd = 2545 = 0.00005. Constants were selected because they were the most optimum constant trial and error method. The system is made to have a more significant percentage of error of 5%. In this study, the response time values obtained for each additional mass of the load at each frequency setting result are increased.
The Identification of Electrical Properties of Acupuncture Points for Asthma Diagnosis Prijo, Tri Anggono; Risti, Norienna Valendiani; Kawitana, Welina Ratnayanti
Indonesian Applied Physics Letters Vol. 2 No. 2 (2021): Indonesian Applied Physics Letters - December 2021
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v2i2.31809

Abstract

The aim of this research is to identify the electrical potential profile on the acupoint betwen healthy people and the patient of asthma. The raw data has taken by recording the electrical potential profile on the acupoints: Feishu, Pishu, and Shenshu from 10 healthy women and the 10 women with asthma attain the age of 20-30 years old based on the second data observation at the Local Government Clinic Kalijudan, Surabaya. Potential profile of the organs were the electrical signals form. It was achieved by the result of electrical potential which was based time recording. Recording time was done for 180 second. The results couldn't be differentiated significantly, so it needs the other signals processing with FFT analyze method with cutting as the data frames. It was done every 5 second. Based on the result of analyzing the amplitude of each frequency group, the significant differences are on the acupoint Shenshu : 0-5 Hz with p= 0.001, on the acupoint Phishu 148-152 Hz with p= 0.010, on the acupoint Feishu for frequency 198-203 Hz with p= 0.004 and on the acuponit Phishu p=0.011, for frequency 348-352 Hz on the acupoint Feishu and Shenshu have both value is p= 0,004 and 398-402 Hz with p=0,009 on the acupoint Phishu. According to the preference, it was found that the electrical potential profile on the acupoints of the healthy people has lower amplitude than the people with asthma. Then, the analyze of electrical potential profile on the acupoints can be used for asthma diagnose. 
ANALYSIS OF POTENTIAL PROFILE CHANGES IN THE BRAIN DUE TO NOISE IN HYPERTENSION PATIENTS Prijo, Tri Anggono; Istiqomah, Istiqomah; Kawitana, Welina Ratnayanti
Indonesian Applied Physics Letters Vol. 3 No. 1 (2022): Indonesian Applied Physics Letters - June 2022
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/iapl.v3i1.39180

Abstract

This study aims to determine the relationship of the potential profile of the brain to noise so that it can affect changes in blood pressure. This research is a type of observational research conducted by treating hypertension and normal blood pressure test. The treatment given was to record brain waves that were given various disturbances of sound intensity levels of 100 dB, 110 dB and 120 dB with a single frequency = 12,000 Hz which was obtained from mosquito noise sources. The recording was done for 60 seconds for each treatment and the data was taken every 2 seconds on the results of the Electroencephalogram (EEG). The analysis used is the FFT test which is generated from the Electroencephalogram (EEG) recording through the program work Labscribeand paired t-test using the SPSS program. The results showed that at varying levels of sound intensity and frequency 12,000 Hz produced theta (hypertension) and alpha (normal blood pressure) brain waves which produced serotonin hormones and caused dilation of blood vessels so that blood pressure decreased. The results of the t-test showed that there was an effect on normal tests on diastole and no effect on systole.
Co-Authors istiqomah istiqomah Kristanto, Yosua Hendra Risti, Norienna Valendiani Tri Anggono Prijo, Tri Anggono