Harmadi Harmadi
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Fabric materials classification device using YOLOv8 algorithm Open
The fashion industry in Indonesia significantly contributes to the country’s creative economy. However, public knowledge about various types of fabric materials is still limited, often leading to fraud. This research aims to develop a devi…
Profit Balance, Stock Trading Volume, Return On Investment And Stock Prices Open
The purpose of the research is to empirically test the profit balance of stock prices, stock trading volume and return on invested capital (ROI). This research method used quantitative linear regression analysis using SPSS IBM 20. The info…
Analisis Sensitivitas Sensor GY-ML8511 dalam Deteksi Formalin Open
Food safety is a crucial aspect in meeting people's nutritional needs. Formalin, a dangerous preservative, is often used illegally to extend the shelf life of foodstuffs, posing serious risks to consumer health. This research develops a po…
View article: Education of Disaster Awareness through Disaster Readiness Socialization as an Effort to Increase Community Knowledge around the Nobita Hill Tourism Area on Disaster Mitigation
Education of Disaster Awareness through Disaster Readiness Socialization as an Effort to Increase Community Knowledge around the Nobita Hill Tourism Area on Disaster Mitigation Open
Nobita Hill, a tourist site in Padang City, is undergoing development as a tourist destination that offers a bird's-eye view of Padang City. Unfortunately, the hilly topography with steep slopes increases the risk of landslides in this are…
Modulation of flood events in Indonesia by seasons, MJO, and La Nina Open
Floods in Indonesia are often triggered by heavy rainfall with a long duration. Such heavy rainfall was influenced by several factors include seasons, Madden-Julian oscillation (MJO), and La Nina. The number of flood events in Indonesia in…
Prototype of Forest and Land Fire Monitoring and Detection System Using IoT-Based WSN Technology Open
Forest and land fires are a recurrent issue in several Indonesian regions, necessitating advanced technological solutions for early detection and monitoring due to their significant impact. This research project focuses on developing a pro…
PENGAYAAN MATERI FISIKA : INDUKSI ELEKTROMAGNETIK DI SEKOLAH MENENGAH ATAS Open
The concept of electromagnetic induction is very important in understanding and developing modern electrical technology. Some factors cause students to often find it difficult to understand electromagnetic induction material in school is t…
Development of River Flow and Water Quality Using IOT-based Smart Buoys Environment Monitoring System Open
Efficient and accurate river water quality monitoring is needed to support laboratory testing based on on-site sampling. Therefore, we have developed a monitoring system for river flow and water quality using sensor-equipped buoys and the …
A Preliminary Assessment of the GSMaP Version 08 Products over Indonesian Maritime Continent against Gauge Data Open
This study is a preliminary assessment of the latest version of the Global Satellite Measurement of Precipitation (GSMaP version 08) data, which were released in December 2021, for the Indonesian Maritime Continent (IMC), using rain gauge …
Development of Measuring Instruments for Lung Vital Capacity and Human Respiratory Rate Based on Fiber Optic Sensors Open
The development of measuring instruments for vital lung capacity and human respiratory rate based on the fiber-optic sensor has a system consisting of a laser diode as a light source, optical fiber as a waveguide, and OPT101 as a photodete…
A Preliminary Assessment of the GSMaP Version 08 Products over Indonesian Maritime Continent against Gauge Data Open
This study is a preliminary assessment of the latest version of the Global Satellite Measurement of Precipitation (GSMaP version 08) data which were released in December 2021, for the Indonesian Maritime Continent (IMC), using rain gauge (…
ULF geomagnetic anomaly associated with the Sumatra-Pagai Islands earthquake swarm during 2020 Open
Observations of earthquake precursors via geomagnetic anomalies from ultra-low frequency (ULF) could provide an expectation for short-term earthquake prediction. However, there are still several obstacles in determining this precursor, one…
Design of Heart Rate, Oxygen Saturation, and Temperature Monitoring System for Covid-19 Patient Based on Internet of Things (IoT) Open
Instruments for measuring pulse rate, oxygen saturation, and body temperature for Covid-19 patients have been designed using the MAX30100 sensor and the Internet of Things (IoT)-based MLX90614 sensor. The MAX30100 sensor is used to measure…
Evaluation of GPM IMERG Performance Using Gauge Data over Indonesian Maritime Continent at Different Time Scales Open
Accurate precipitation observations are crucial for water resources management and as inputs for a gamut of hydrometeorological applications. Precipitation data from Integrated Multi-Satellite Retrievals for Global Precipitation Measuremen…
Wireless Data Logger Instrument for Indoor Acoustic Quality Measurement Based on Noise Background, Sound Distribution and Reverberation Time Open
A wireless data logger system measuring indoor acoustic quality was developed using a NodeMCU ESP8266 and microphone sensor KY-037. The acoustic quality is based on parameters of sound pressure level and reverberation time. The system cons…
Statistical Comparison of IMERG Precipitation Products with Optical Rain Gauge Observations over Kototabang, Indonesia Open
Satellite-based precipitation estimates play a crucial role in many hydrological and numerical weather models, especially to overcome the scarcity of rain gauge data. Globally gridded rainfall product from Integrated Multi-Satellite Retrie…
Comparison of Bright Band Radar from GPM and MRR Observation in West Sumatera Open
The Bright band (BB) observation can be used as an indication of the melting layer height. Measurement of BB from Normal Scan (NS) on Global Precipitation Measurement (GPM) had been compared with Micro Rain Radar (MRR), which is installed …
Rancang Bangun Alat pendeteksi Tingkat Tekanan Bunyi Terhadap Respon Membran Timpani Berbasis Serat Optik Open
It has been designed a sound pressure level detection for response of tympanic membrane based on optical fiber with extrinsic method. The fiber optic sensor is used to measure the sound pressure level by utilizing the output voltage change…
Prototype of Rainfall Intensity Measurement Using CCD TSL1401CL Linear Sensor Array Open
A prototype measurement of rainfall intensity was developed using a CCD TSL1401CL linear sensor array. The prototype consists of a He-Ne laser that functions as a light source, which later is focused by the beam expander and conditioned by…
View article: International Telecommunication Union-Radiocommunication Sector P.837-6 and P.837-7 performance to estimate Indonesian rainfall
International Telecommunication Union-Radiocommunication Sector P.837-6 and P.837-7 performance to estimate Indonesian rainfall Open
This work evaluated the performance of International Telecommunication Union-Radiocommunication Sector (ITU-R) P.837-6 and P.837-7 models (Annex 1) to estimate one-minute rainfall rates in Indonesia. In addition to the default ITU-R P.837-…
The Relationship between Innovation, Financial Development, and Economic Growth : Testing in ASEAN Countries for the Period 1986-2015 Open
This study aims to determine the relationship between innovation, financial development, and economic growth. Innovation is measured by patents, and economic growth is measured by the percentage of GDP per capita, while financial developme…
Seasonal and Diurnal Variations of Lightning Activity Over West Sumatra and Its Correlation with Precipitation Type Open
Seasonal and diurnal variations of lightning activity over West Sumatra have been investigated using observations of Tropical Rainfall Measuring Mission–Lightning Imaging Sensor (TRMM–LIS) over a 16-year period. This study also used TRMM 3…
Islamic Financial Literacy and Personal Financial Planning: A Socio-Demographic Study Open
This study aims to measure the level of Islamic Financial Literacy (IFL) in Solo society and to test the effect of IFL on personal financial planning. The socio-demographic variables such as age, gender, marital status, education level, an…
Households, Financial Distress, and Predatory Lending: An Experimental Study Open
A substantial part of households and micro enterprises, particularly in developing countries including Indonesia, did not have access to formal financial institutions which then lead them to borrow money from illegal loan providers. Using …
UJI KEMURNIAN BENSIN DI SPBU DAN PENGECER SE-KOTA PADANG MENGGUNAKAN METODE SPEKTROSKOPI SERAPAN ATOM MERKURI Open
The gasoline purity test has been carried out in several retailers inPadangcity using Mercury atomic absorption spectroscopy method. As an object of study was taken 10 samples of gasoline were sold in stalls scattered retailers in the city…