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All Journal BERKALA FISIKA Jurnal Ilmiah Arena Tekstil Journal of Physics and Its Applications Jurnal Pijar MIPA Physics and Science Education Journal (PSEJ)
Pandji Triadyaksa
Department Of Physics, Faculty Of Science And Mathematics, Diponegoro University, Semarang
Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

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Journal : BERKALA FISIKA

 1 
Analisis Fenomena Elektrohidrodinamik pada Permukaan Minyak Silikon Menggunakan Plasma Lucutan Pijar Korona Positif Rahayu, Sri; Azam, M.; Triadyaksa, Pandji; Nur, Muhammad
BERKALA FISIKA Vol 10, No 1 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

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The aim of this research is analysis electrohydrodynamic phenomenon deformation of oil silicon surface by technology of positive corona glow discharge plasma which generated by plasma generator system with point-to-plane electrodes geometry configuration. Variation of voltage and distance between electrodes had been treated to surface of silicon oil. Electrohydrodynamic phenomenon deformation in this research is caused by polarization and ion wind. Ionic wind would be happened if applied voltage over the corona threshold that was 2.6 kV. Graph current of saturation corona unipolar for variation voltage, being formed semi-parabolic equation while the variation of distance between electrodes, being formed linear equation. The hole diameter at variation voltage was influenced by electrics field intensity and momen dipole strength. The hole diameter at variation of distance between electrode was influenced by parabolic angle of electrics line field. The oil velocity for back to initial position is different. Velocity would be go down if the voltage progressively go up and velocity would be go up if the distance between electrode progressively go up.
Rancang Bangun dan Pengujian Sistem Reaktor Plasma Lucutan Pijar Korona guna Mempercepat Pertumbuhan Tanaman Mangrove Triadyaksa, Pandji; Nur, Muhammad; Nasrudin, Nasrudin; Wasiq, J.
BERKALA FISIKA Vol 10, No 3 (2007): Berkala Fisika
Publisher : BERKALA FISIKA

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Plasma glow discharge corona reactor system has been made and tested to stimulate mangrove growth. Plasma glow discharge corona reactor consists of DC high voltage system and point to plate electode system. Reactor performance test has done on Rhizophora apiculata mangrove species. High voltage system mainly develop using TV fly back that been triggered by pulsed frequency using oscillator circuit. Point to plane electrode system was designed to maintain two electrode range remains 3 cm with number of point electrode plugged parallel with plane electrode are 63 pieces. Plasma glow discharge corona reactor tested  was done on radiation process of mangrove seed by divided sample groups into 6 sample which have different time radiation and 1 sample that not been radiated as a control data. Mangrove growth was analyzed by measure the growth of mangrove plumulae after 17 days of cultivation. Research results shows that in developing plasma glow discharge corona to radiate mangrove, plasma reactor system works in 8 kV DC plasma voltage development. Mangrove growth after 6 time variation of plasma radiation shows a good effect of growth stimulation along with longer radiation time duration.  The increase of mangrove growth was hypothetically caused by an increase of nitrogen concentration in mangrove seeds because of ion nitrogen fixation in the seeds during plasma radiation process
KARAKTERISASI REAKTOR PLASMA BERARUS NEGATIF DENGAN KONFIGURASI ELEKTRODA TITIK-BIDANG DAN PENERAPANNYA PADA KAIN POLYESTER RAJUT GREY Hasan, Siti Nurjannah; Muhlisin, Zaenul; Triadyaksa, Pandji; Arianto, Fajar
BERKALA FISIKA Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019
Publisher : BERKALA FISIKA

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Research on characterisations of plasma reactor with negative current of square-point electrode configuration and its application on grey polyester knit fabric has been carried out. The objectives of this reseach were obtaining characterisation of negative plasma reactor, either with or without sample of the polyester knit fabric, getting ion mobility value, gaining the characterisation of irradiated polyester knit fabric of grey, and obtaining SEM results indicating the morphological changes of the fabric. A Plasma-Electrode Point Plasma reactor which is connected to a high-voltage DC power plant was used in this study. The size of pointfield electrodes was 15 x 15 cm2 with a 1.6 cm needle. The size of the grey knit polyester fabric used was 10 x 10 cm2. Variations in distance between electrodes were 1.5 cm, 1.8 cm, 2.1 cm 2.4 cm, 2.7 cm, 3.0 cm, and 3.3 cm. The results have shown that if the voltage increases, then the current value increses. The voltage which is needed to produce a lower current values is that the presence of a polyester knit fabric of grey. The highest voltage and current values witout sample can be found at a distance of 3.3 cm with a current value of 2.5 mA at a voltage of 3.027 kV, compared with presence of a sample, a current value of 1.6 mA at a voltage of 3.445 kV. The greater distance of the electrode, the smaller ion of the mobility is achieved. Based on the results of the water drop test showed that the longer the irradiation of the cloth, the faster duration of absorption. This is indicated by a distance of 2.4 cm in the duration of 5 minutes obtained the absorption time of 2.15 seconds while in the duration of 35 minutes obtained 1.47 seconds. In the SEM test, it is used 2 cloths where the first cloth used as a control or not subjected to plasma that has little damage where as the second fabric is subjected to plasma treatment with the time of irradiation is about 20 minutes that have damage or peeling on the surface of polyester knit fabrics grey.Keywords: Plasma corona, multi-point field, ion mobility, polyester fabric, textile treatment, the meeting properties of fabric.
STUDI PRODUKSI RADIONUKLIDA MEDIS UNTUK GENERATOR 89Sr/90Y DARI HASIL REAKSI 89Rb(p,n)89Sr/90Y PADA SIKLOTRON MEDIK SECARA KOMPUTASI Hidayat, Yusup; Wardaya, Asep Yoyo; Triadyaksa, Pandji; Setiawati, Evi; Muhlisin, Zaenul; Sumariyah, Sumariyah; Suseno, Jatmiko Endro; Binu Soesanto, Qidir Maulana
BERKALA FISIKA Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019
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A computational calculation to determine production capacity of 90Y from the results of nuclearreactions 89Rb(p,n)89Sr/90Y from several medical cyclotrons has been carried out. Calculations were used to obtain the target thickness of 89Rb and maximum activity of 90Y on variable energy, time and irradiation currents. Calculations were also carried out to measure the impurity radionuclide activity during the reaction. The results activities of 90Y were obtained through modeling using the SRIM-2013 software and the TENDL-2017 application and calculated using MATLAB software. The results modeling and of calculations can predict the activity of 90Y and it can be used as an initial reference in the radionuclide production process using a cyclotron. The maximum activity of 90Y of 5409.80 mCi with a 10.54 mm-target thickness of 89Rb is generated from a cyclotron which has a 30 MeV proton beam with a 50 μA radiation current beam and 2 hours irradiation time. Using the same proton, current and irradiation time at irradiation energy of 8 MeV, 15 MeV and 22 MeV, the produced activity of 90Y was smaller, there are 552.28 mCi, 2100.39 mCi and 3644.31 mCi. The radioisotope of 90Y can be used in patients with a normal dose of 0.4 mCi / kg body weight, therefore in one production can supply the needs of 104 patients.Keywords: medical cyclotron, calculation and modeling, 90Y activity
SISTEM OTOMATISASI DAN KENDALI JARAK JAUH LAMPU SMART HOUSE BERBASIS NODEMCU ESP8266 Ningrum, Febri Sintia; Triadyaksa, Pandji
BERKALA FISIKA Vol 23, No 4 (2020): Berkala Fisika
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Internet of Things (IoT) is a concept that aims to expand the benefits of continuously connected internet connectivity. This research aims to utilize IoT on home remote control and automates systems that can be operated with a smart phone application via an internet connection (WiFi). This system used the NodeMCU ESP8266 module as a microcontroller, the light emitting diode (LDR)  sensor  as  an  automation  controller  for  lighting  the  environment  according  to environmental conditions, and the Blynk smartphone application as a remote controller. The process of controlling the lights can be done specifically on certain lights and can be controlled by  the  changes  of  environmental  light  in  the  morning  and  evening.  The  results  showed  that when the LDR sensor was poorly lit, the lamp would be ON and otherwise the lamp would be OFF when the LDR receives more light intensity. In addition, the Blynk application is able to control the lights when connected with internet and tested, in this research, up to 2.7 km. It can be concluded that as long as the system is connected to the WiFi in a stable and continuous manner,  then  this  control  system  can  perform  the  task  of  turning  on  and  off  the  lights independently when the owner is not at home.Keywords: Internet of Things (IoT), Blynk, LDR, Smart House, NodeMCU ESP6288 
SISTEM PENYIRAM TANAMAN CABAI OTOMATIS UNTUK MENJAGA KELEMBABAN TANAH BERBASIS ESP8266 Priyono, Andi; Triadyaksa, Pandji
BERKALA FISIKA Vol 23, No 3 (2020): Berkala Fisika
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The process of planting certain plants requires extra attention, especially in maintaining soil moisture such as in chili plants. Therefore, this research develops an automatic plant watering system that can be monitored via a smartphone using the Telegram application. This system can  do  automatic  watering  according  to  soil  moisture  and  measures  the  temperature  and humidity of the surrounding environment controlled by ESP8266 which is equipped with 16x2 LCD,  YL-69  sensor,  and  DHT11  sensor.  Watering  system  trials  show  excellent  readability comparable  to  calibrators.  Temperature,  humidity,  and  soil  moisture  are  informed  via  a smartphone and LCD that are attached to the watering prototype. The Telegram application is able to send information to carry out the function of watering automation when the soil moisture is less than 50% as a reference in accordance with the characteristics of the chili plants. In addition, the automatic sprinkler trial via the Telegram command, as desired by the user, was also successfully carried out. It is concluded that development of a plant watering system based on soil moisture information has been successfully carried out. The system shows the ability of the Telegram application to provide remote commands to the system that works.Keywords:  Automatic  plant  watering  system,  ESP8266,  Sensor  YL-69,  Sensor  DHT11,  Chili  plants, Telegram
Co-Authors Achmad Sjaifudin Tayibnapis Ali Khumaeni Asep Yoyo Wardaya Binu Soesanto, Qidir Maulana Budiman, Rizki Dhyan Prastiwi Evi Setiawati Fajar Arianto Fajar Ariyanto Hasan, Siti Nurjannah Heri Sutanto I Gusti Bagus Wiksuana Iis Nurhasanah J. Wasiq Jatmiko Endro Suseno Kusuma, Annisa Dian Mahendra Kusuma Nugraha Muchammad Azam, Muchammad Muhammad Adrian Lathif Muhammad Nur Muhammad Nur Nasrullah, Faiz Ningrum, Febri Sintia Priyono Priyono Priyono, Andi Rasito Tursinah, Rasito Rukmono, Dito Andi SRI RAHAYU Sumariyah Sumariyah Susilo Hadi Wienda Intan Permatasari Yusup Hidayat Zaenul Muhlisin