Article Per Year (5 Year)
p-Index From 2021 - 2026
0.659
P-Index
This Author published in this journals
All Journal SAINSMAT BAREKENG: Jurnal Ilmu Matematika dan Terapan Spektra: Jurnal Fisika dan Aplikasinya Indonesian Journal of Applied Research (IJAR) Journal of Applied Agricultural Science and Technology Pattimura Proceeding : Conference of Science and Technology SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam Innovative: Journal Of Social Science Research
Ronaldo Talapessy
Universitas Pattimura
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Transportation Other

Published : 8 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 8 Documents
Search

 1 
Optimasi Suhu Dalam Prototipe Kotak Inkubasi Talapessy, Ronaldo; Elisabeth Sahertian, Dece
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 2, No 1 (2013): Maret
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (104.988 KB) | DOI: 10.35580/sainsmat217472013

Abstract

DOWNLOAD PDFPenelitian  ini  dilakukan  untuk  menghasilkan  prototipe  kotak  inkubasi  dengan  suhu optimal.  Kontrol suhu dilakukan dengan menggunakan pemanas (heater) dan kipas angin (fan) dalam kotak inkubasi berukuran 270 cm3bersifat adiabatik. Heater  digunakan untuk menaikan  suhu  dalam  kotak  inkubasi  dan  fan  untuk  menurunkan  suhu  dalam  kotak inkubasi.  Hasil  penelitian  menunjukkan  bahwa  untuk  mendapatkan  distribusi  suhu  yang optimal  dari   32oC  sampai  80oC  digunakan  heater  60  W  selama  14,92  menit,  dan menurunkan suhu dari 80oC ke 34 oC selama 4,6 menit.Kata kunci: Kontrol suhu, heater, fan, kotak inkubasi.
THE MAGNETIC PROPERTIES MEASUREMENT OF COIL FOR GRAVITATIONAL ACCELERATION DETERMINATION Cherly Salawane; Supriyadi Supriyadi; Ronaldo Talapessy; Mirtha Yunitha Sari Risakotta
Spektra: Jurnal Fisika dan Aplikasinya Vol 5 No 2 (2020): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 5 Issue 2, August 2020
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/SPEKTRA.052.04

Abstract

The value of the gravitational acceleration of the earth above the earth’s surface depends on the position of the latitude and longitude of the earth’s surface, in other words, because the shape of the earth’s surface is not round like a ball. The magnitude of gravity is not the same everywhere on the surface of the earth. The purpose of this study is to analyze the value of the earth’s gravitational acceleration in a laboratory using a current balance with a graphical method. Fluctuations in the value of the magnetic field strength (B) and the value of the electric current strength (i) on the current balance cause the value of laboratory gravitational acceleration (glab) to vary in the transfer of electric charge (q) according to coil type. The magnitude of the earth’s gravitational acceleration value obtained in a laboratory with a current balance for each type of coil is as follows: SF-37 glab-nr=9.89 m/s2, SF-38 glab-nr=9.90 m/s2, SF-39 glab-nr=9.76 m/s2, SF-40 glab-nr=9.95 m/s2, SF-41 glab-nr=9.75 m/s2 dan SF-42 glab-nr=9.93 m/s2. The results obtained indicate that the value of the earth’s gravitational acceleration in a laboratory close to the literature value is the value of the glab-nr in the SF-37 coil type of 9.89 m/s2.
ALCOHOL CONCENTRATION DETECTOR IN LIQUOR BASED ON MICROCONTROLLER Mirtha Y. S. Risakotta; Ronaldo Talapessy; Rosita De Fretes
Pattimura Proceeding 2017: Proceedings of the 3rd International Seminar of Basic Science
Publisher : Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.731 KB) | DOI: 10.30598/PattimuraSci.2017.ICBS3.117-122

Abstract

Has made an alcohol concentration detector based on microcontroller that can detect alcohol concentration in liquor is accurate, fast, stable and has a high sensitivity. In this research, use traditional liquor of Moluccas “Sopi”, and liquors on the market. An alcohol concentration detector was built based on microcontroller ATmega16 which can receive and process data from the sensor MQ-3 in a form that can be converted into the form of an electrical signal and the output is displayed on the LCD. Calibration of the sensor MQ-3 shows that the greater the value of resistance sensor, the smaller the value of an alcohol concentration. The correlation of resistance sensor to alcohol concentration is plotted in a graph of linearity with R2 = 0,9982. The results of liquor on the market and Sopi (premium quality) had alcohol concentration ranging between 3 – 5% per mL, while an alcohol concentration of Sopi (regular quality) is below 3% per mL.
Optimasi Suhu Dalam Prototipe Kotak Inkubasi Ronaldo Talapessy; Dece Elisabeth Sahertian
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol 2, No 1 (2013): Maret
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/sainsmat217472013

Abstract

DOWNLOAD PDFPenelitian  ini  dilakukan  untuk  menghasilkan  prototipe  kotak  inkubasi  dengan  suhu optimal.  Kontrol suhu dilakukan dengan menggunakan pemanas (heater) dan kipas angin (fan) dalam kotak inkubasi berukuran 270 cm3bersifat adiabatik. Heater  digunakan untuk menaikan  suhu  dalam  kotak  inkubasi  dan  fan  untuk  menurunkan  suhu  dalam  kotak inkubasi.  Hasil  penelitian  menunjukkan  bahwa  untuk  mendapatkan  distribusi  suhu  yang optimal  dari   32oC  sampai  80oC  digunakan  heater  60  W  selama  14,92  menit,  dan menurunkan suhu dari 80oC ke 34 oC selama 4,6 menit.Kata kunci: Kontrol suhu, heater, fan, kotak inkubasi.
Investigation of Original Honey Based on Electrical Impedance Ronaldo Talapessy; Debora Fransiska Br. Giawa; Tomoaki Ikegami
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 3 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i3.381

Abstract

Honey comes from nectar extracted by bees and benefits the food industry. However, marketing often involves deception, such as mixing it with sugar. This study aims to distinguish between original honey and honey with adding sugar based on electrical impedance. The study was carried out to measure pure forest honey (Apis dorsata) and honey that was added sugar from 10 g to 60 g, where current 30 mA was applied at 100 Hz – 100 kHz. Additionally, some physicochemical characteristics of honey were measured to compare with the electrical impedance. The result shows that pure honey's impedance is lower than adding sugar. The electrical impedance of pure honey increases with the addition of sugar. Investigation of the electrical impedance on quality of honey preferable applied at the frequency from 100 Hz to 1 kHz.
DESAIN ALAT UKUR SUHU DAN KELEMBABAN BERBASIS MIKROKONTROLER ATMEGA 16 Talapessy, Ronaldo
BAREKENG: Jurnal Ilmu Matematika dan Terapan Vol 6 No 2 (2012): BAREKENG : Jurnal Ilmu Matematika dan Terapan
Publisher : PATTIMURA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.187 KB) | DOI: 10.30598/barekengvol6iss2pp29-31

Abstract

The has already designed temperature and humidity measurement devices using SHT11 sensor with display results in Liquid Crystal Display (LCD). Manually, the environmenttemperature was measured using a mercury thermometer and the environment humidity was measured by a hygrometer. The results were observed in analog and it often misread thus it caused errors in ready the data. To solve the problem, then were made a design temperature and humidity measuring devices digitally. The processor of this tool is ATMega16microcontroller that processes analog input signals to obtain a digital output. Temperature and humidity sensors SHT11 were used, the measurement results and read digital displayon the LCD. This design produced temperature and humidity measurement, aids accurately, it was ± 0.4 ° C and ± 3%.
Implementasi Sensor Gerak (PIR) sebagai Detektor Gerakan Manusia dalam Ruang Salamena, Gianita Anastasia; Talapessy, Ronaldo; Loupatty, Grace; Kelibulin, Josephus R.; Salamena, Vicky
Innovative: Journal Of Social Science Research Vol. 4 No. 2 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i2.12019

Abstract

Pada penelitian ini telah dirancangbangun sebuah Sistem pendeteksi gerak tubuh manusia terdiri dari rangkaian digital yang menerima sinyal analog sensor gerak PIR GH718 berdasarkan gelombang inframerah yang dipancarkan oleh manusia dan diubah menjadi sinyal digital rangkaian pengendali berbasis mikrokontroler ATmega8535. Sistem dilengkapi dengan Buzzer dimana, dimana ika sinyal keluaran analog sensor tersebut menangkap gelombang panas akibat pergerakan manusia, maka rangkaian digital akan dibentuk oleh rangkaian catu daya untuk menyalakan bel listrik, sebagai indikator keberadaan manusia. Sistem pendeteksi dapat mendeteksi keberadaan manusia dengan jarak maksimum 7 meter, secara horizontal dan vertikal sensor mendeteksi pada sudut 300 hingga 1500 di depan sensor, dengan tegangan keluaran 3.57 V ketika mendeteksi pergerakan tubuh manusia dan 0 V ketika tidak mendeteksi gerak tubuh manusia.
Application of Electrochemical Impedance Spectroscopy to Evaluate Ripeness and Storage-Induced Quality Changes in Nutmeg (Myristica fragrans Houtt) Talapessy, Ronaldo; Salamena, Gianita A.; Sabandar, Pricillia J.; Ikegami, Tomoaki
Journal of Applied Agricultural Science and Technology Vol. 9 No. 4 (2025): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v9i4.476

Abstract

Nutmeg (Myristica fragrans Houtt) is an endemic fruit essential in the food industry; nevertheless, local farmers still rely on conventional methods to determine harvest time. The objectives of the research are to determine the freshness and ripening of nutmeg using the Electrochemical Impedance Spectroscopy (EIS) method. This study investigates the impedance of ripe and unripe nutmeg after five days of storage at 27°C and 4°C within a frequency range of 0–15 MHz.  Ripe fruit has an impedance of 2-6 MW, lower than unripe fruit at 9-12 MW.. The high and steady impedance at low frequencies indicated the low moisture content and preserved cellular integrity of the ripe fruit. In contrast, the impedance of unripe fruits decreases gradually, indicating greater permeability and tissue disintegration. Advanced tissue breakdown reduces impedance despite decreasing water content, and these electrical changes are associated with mass loss from respiration and dehydration. The weight of nutmeg remains stable at lower temperatures but decreases at room temperature. The findings demonstrate that EIS is a rapid and non-invasive technique for assessing nutmeg maturity and postharvest quality, supporting more accurate prediction and improved storage management.
Co-Authors Cherly Salawane Debora Fransiska Br. Giawa Dece Elisabeth Sahertian Dece Elisabeth Sahertian Ikegami, Tomoaki Kelibulin, Josephus R. Loupatty, Grace Mirtha Y. S. Risakotta Risakotta, Mirtha Yunitha Sari Rosita De Fretes Sabandar, Pricillia J. Salamena, Gianita A. Salamena, Gianita Anastasia Salamena, Vicky Supriyadi Supriyadi Tomoaki Ikegami