Article Per Year (5 Year)
p-Index From 2020 - 2025
0.817
P-Index
This Author published in this journals
All Journal Pillar of Physics: Jurnal Berkala Ilmiah Fisika Jurnal Berita Ilmu Keperawatan
Asrizal, A
Unknown Affiliation
Earth & Planetary Sciences Health Professions Materials Science & Nanotechnology Nursing Physics Public Health

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Effectiveness of Progressive Mobilization on Functional and Hemodynamic Status in Bedrest Patients in the ICU: Randomized Controlled Trial Aryanti, Dina; Tanjung, Dudut; Asrizal, A
Jurnal Berita Ilmu Keperawatan Vol. 15 No. 2 (2022): July
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/bik.v15i2.17937

Abstract

Patients with health problems who undergo bed rest for a long time can experience various health problems. Problems that can be felt by patients on functional and hemodynamic status. This study aims to identify the effectiveness of progressive mobilization on functional status and hemodynamics in bed rest patients. The research method used a qualitative design with a randomized controlled trial method. The number of samples in this study was 70 people for each group. The sample in this study was taken by simple random sampling method with a total of 70 people in the control group and 70 people in the intervention group. Bivariate statistical test used Friedman and Mann Whitney test, while multivariate test used logistic regression. The results of this study showed that there was a significant effect of progressive mobilization on functional and hemodynamic status (p<0.05). The conclusion of this study is that progressive mobilization is effective on the functional and hemodynamic status of the patient so that it can be applied in the ICU of the hospital as a nursing intervention
A Monitoring System of Water Quality Based on Arduino for Tilapia Pond Amelia, Fitri; Yohandri, Y; Asrizal, A; Mairizwan, M
PILLAR OF PHYSICS Vol 17, No 2 (2024)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/14968171074

Abstract

The problem that often occurs in fish farming is fish mortality caused by changes in pond water quality. One of the causes of changes in pond water quality is caused by changes in water pH levels, temperature, and turbidity of pond water. So far, measuring the quality of pond water has been done manually. It is necessary to design a monitoring system to provide warnings regarding the quality of fish pond water. The aim is to provide information if the water value is below the optimal value for fish development. This research is engineering research. The measurement techniques used are direct and indirect measurement. Direct measurement techniques are carried out by comparing data on pH, temperature, and turbidity levels between standard tools and measuring devices. The indirect measurement technique is done by analyzing the data. Based on the results of the Arduino-based tilapia pond water quality monitoring system, it consists of performance specifications for tools built with three sensors, namely pH, DS18B20, and turbidity sensors, and design specifications are divided into characterization, accuracy, precision, and tool testing.
Thyristor Based Marx Impulse Generator Circuit Prototype for Pulsed Inductive Thruster (PIT) Propulsion System Karlo, Aditya Adriano; Yohandri, Y; Asrizal, A; Mairizwan, M
PILLAR OF PHYSICS Vol 18, No 1 (2025)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/16172171074

Abstract

Pulsed Inductive Thruster is a type of electric propulsion system for spacecraft. It requires high voltages to operate, wherein a Marx impulse generator circuit is used. This circuit requires a switching component, which in the most basic form of such circuit is a spark gap switch. A spark gap switch undergoes rapid degradation whilst in use, which limits its lifespan before needing replacement; a hindrance for operations in space. To circumvent this problem, solid state switches might be used in the stead of spark gap switches. One such switch is a thyristor, whose feasibility was tested in this research. A four-stage basic form of the Marx impulse generator circuit had its spark gap switches replaced with thyristors, and a control unit fitted. Inputs at 2, 4, 6, and 8 volts were given, resulting in outputs at average 0.5, 1.4, 2.1, and 3.1 volts, with σ 0.095, 0.14, 0.1, and 0.1 respectively. These results do not indicate that thyristors might be feasible as an alternative to spark gap switches.
Prototype of Early Detection and Home Fire Extinguishing System Based on IoT and GPS Syarif, Peto; Mairizwan, M; Asrizal, A; Yohandri, Y
PILLAR OF PHYSICS Vol 18, No 1 (2025)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/16845171074

Abstract

Fire is a disaster that can occur at any time, anywhere, without realizing it, causing material loss and even loss of life. Based on data from the Padang City Fire Department, there will be 198 fire cases in 2023 and 230 in 2022. Even though it has decreased, the risk of fire is still a serious threat. The main cause of fires is delays in detection and handling due to delays in information and inaccurate positioning. Therefore, this research aims to design a prototype system for early detection and home fire extinguishing based on IoT and GPS. This research is a type of engineering research; the system design includes an IR fire sensor for fire detection, an MQ-135 sensor for CO2 gas detection, and a NEO-7M GPS module for location tracking. This system uses an Arduino Uno microcontroller and an ESP32 NodeMCU for data processing and IoT connectivity. The research results show that the system performance specifications have good linearity sensor characteristics (R² close to 1), Blynk and WhatsApp application interfaces for monitoring and alarm notifications, as well as a 50x50x50 cm prototype equipped with a water pump and fan. Design specifications indicate a voltage measurement accuracy of 96.27% and a CO2 concentration of 97.56%. For voltage measurements, the precision is 99.81% and the CO2 concentration is 98.31%. The actuator operates at a predetermined set point and performs well. The early warning system test worked well with a time lag of 5–15 seconds.
Co-Authors Dina Aryanti Dudut Tanjung Fitri Amelia Karlo, Aditya Adriano Mairizwan, M Syarif, Peto Yohandri, Y