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INDONESIA
BERKALA FISIKA
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Physics
BERKALA FISIKA adalah jurnal saintifik yang diterbitkan secara periodik 3 bulanan. Jurnal ini memuat kajian-kajian Fisika baik kajian teoretik maupun hasil eksperimen. Jurnal ini juga memberi ruang yang luas bagi kajian – kajian aplikasi fisika dalam bidang teknologi, ilmu-ilmu hayati dan kedokteran.
Arjuna Subject : -
Articles 3 Documents
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Search results for , issue "Vol 24, No 4 (2021): Berkala Fisika" : 3 Documents clear
ANALISIS FENOMENA ELEKTROHIDRODINAMIK PADA PERMUKAAN MINYAK MENGGUNAKAN PLASMA LUCUTAN KORONA DC POSITIF DENGAN KONFIGURASI ELEKTRODA GRADIENT OF LINE-TO-PLANE (GL-P) Nuraini, Desy; Wardaya, Asep Yoyo; Muhlisin, Zaenul
BERKALA FISIKA Vol 24, No 4 (2021): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Tujuan dari penelitian ini adalah untuk menganalisis pengaruh beberapa variasi yang dipakai terhadap kurva karakteristik serta persebaran angin ion pada fenomena elektrohidrodinamik. Elektroda aktif yang digunakan berukuran 2x4 cm, 3x6 cm, serta 4x8 cm. Penelitian ini dilakukan dengan variasi sudut ketajaman bentuk elektroda aktif () , , dan  dan variasi jarak antar elektroda () , ,  , dan . Hasil penelitian pada kurva I-V menunjukkan bahwa kuat arus bertambah sejalan dengan bertambahnya tegangan, serta pada analisis elektrohidrodinamik menyatakan bahwa pengaruh diameter lubang gumpalan minyak akan berubah jika variasi yang digunakan juga berubah. Penelitian dilakukan dengan elektroda aktif dengan bentuk, ukuran, sudut ketajaman serta jarak antar elektroda yang sama besar.
RANCANG BANGUN SISTEM KENDALI HUMIDIFIER JARAK JAUH BERBASIS MIKROKONTROLER DENGAN IoT (INTERNET OF THINGS) Zakiyyah, A.Z.; Sumariyah, Sumariyah; Suseno, Jatmiko Endro
BERKALA FISIKA Vol 24, No 4 (2021): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Room conditions that are too dry or too humid are not good for human health, so we need a humidifier that can maintain humidity in the room. There has been no research on humidifiers that apply DHT22 and HC-SR04 sensors and smartphone as device controls. This reasearch is to design of a humidifier that can be controlled from a smartphone with the addition of these two sensors. In this study, the DHT22 sensor was used as a temperature and humidity detector, with a measurement error of 1.5% for temperature and 1.12% for humidity. The HC-SR04 sensor is used to detect the water capacity in the humidifier with a measurement error of 0.48%. The system is made using NodeMCU ESP8266 which can send sensor readings directly to WiFi. The sensor reading results are sent via the internet to the server and then displayed on the Blynk application on the smartphone. In the Blynk application, the desired humidity set point value can be adjusted, and the state of temperature, humidity, and water capacity in the humidifier can be monitored. This Blynk app can display a notification when the water inside humidifier is running low. The system can also display notifications based on set point and detected relative humidity value. If the detected humidity is lower than set point, a notification will appear and humidifier will be automatically turned on. Otherwise if the humidity is higher than set point, a notification will appear and humidifier will be automatically turned off.
PENENTUAN AKUMULASI RADIOFARMAKA Tc99m MDP PADA SPINE DAN STERNUM SAAT PEMERIKSAAN BONE SCAN PASIEN KANKER PAYUDARA Arifah, Dwi Intan; Setiabudi, Wahyu
BERKALA FISIKA Vol 24, No 4 (2021): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Based on data from Indonesian Health Ministry, breast cancer is the type of cancer with the highest prevalence in Indonesia amounted to 0.5% in 2013. This study aims to determine the accumulation of  activity  Tc99m  Methylene  Diphosponate  (MDP)  on  the  bone  around  the  breast,  spine  and sternum. This study was conducted on 30 patients undergoing the bone scan using in vivo nuclear medicine technique. The study was conducted using Tc99m obtained from elution of Mo99 generator and mixed with MDP. Bone scan was performed by injecting Tc99m MDP intravenously into the patients arm as much 15.84 – 21.95 mCi. Furthermore, the anterior posterior planar imaging in whole of body at 4 hours after injection of the patient by using a gamma camera. Then, using region of interest (ROI), the accumulative of activity on bone can be measured. A range of values based on the activity of bone metastasis can be seen from the percentage uptake of lesions found on the spine  and  sternum.  Based  on  the  existence  of  lesions,  there  were  12  patients  had  lesions  in  the spine only, 9 patients had lesions in the sternum only, 7 patients had lesions on both of them and there are 16 patients who have not lesions in both.

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