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All Journal Jurnal IPTEK Jurnal Riset Teknologi dan Inovasi Pendidikan (Jartika) Specta Journal of Technology
Mahendra Satria Hadiningrat, Mahendra Satria
Jurusan Fisika FMIPA ITS
Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Social Sciences

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Feynman Path Integral in Multiple-Slit and its Simulation Hadiningrat, Mahendra Satria
SPECTA Journal of Technology Vol 2 No 1 (2018): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v2i1.96

Abstract

In this article we hold on an analytic solution of the well-known cases of difraction and interference of electrons through one and two slits (simply that, the one-dimensional case is assumed only). In addition, we hold an approximations of the electron distribution which offer the interpretation of the results. Our derivation is based on the Feynman path integral formula and this work could also serve an awesome introduction to multiple slits interference. Then it is comparing between theoretical results and simulation in order to get interference pattern of it.
FABRIKASI PANEL SURYA BUATAN BERLAPIS EKSTRAKSI PASTA GIGI DENGAN SENSITIZED DYE KLOROFIL DAUN SERTA ANALISIS KAPASITANSI LISTRIKNYA Hadiningrat, Mahendra Satria; Eggi Aunur Rofiq
Jurnal Riset Teknologi dan Inovasi Pendidikan (JARTIKA) Vol 3 No 2 (2020): Juli
Publisher : Pusat Penelitian dan Pengembangan Rekarta Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (924.92 KB) | DOI: 10.36765/jartika.v3i2.259

Abstract

Abstrak: Penelitian ini bertujuan untuk menganalisa seberapa besar kapasitansi listrik panel surya berlapis tabir surya/Titanium dioksida dan pasta gigi dengan menggunakan ekstraksi Daun. Prosedur penelitian dengan menggunakan dua kaca (masing-masing 8x8,5 cm) dibuat panel (12 Sel Suryaà24x34 cm), satu kaca (elektroda primer) dilapisi tabir surya dan pasta gigi sebagai kaca konduktif, ekstraksi daun, air jeruk nipis/ buah cerme dan Betadine (Iodine 10%) sebagai penghantar listrik serta kaca yang lain dilapisi grafit sebagai elektroda counter, kemudian diukur besar kapasitansinya. Variasi data yang digunakan yaitu ukuran panel dan lama penyinaran. Panel surya tersebut akan direncanakan diaplikasikan ke lampu 5-40 W dengan perantara Power Inverter 150 W, Solar Charge Controller dan Aki basah (12V, 5Ah). Besar kecil kapasitansi serta arus yang keluar dari panel surya bergantung pada ukuran panel dan lama penyinaran ke panel dan variasi tegangan aki basah, kemudian hasil  penelitian ini memperoleh arus besar sehingga keluaran daya AC (lampu) terakomodasi sesuai kapasitas panel surya. Abstract: For that goal, analized much of solar panel capacitance which is topped of Titanium dioxide and Paste with leaves extraction. The method used 2 paralel blocks (each of 8x8,5 centimeters) that made in panel (12 solar cell à 24x 34 centimeters), 1 block (as primary electrode) was being topped by Titanium dioxide dusts and paste as a conductive irons, leaves extractions, lemon water and betadine (such as povidone iodine included), that goes as in countered electrode, then its jump toward to get capacitance analized. Data variation could be used of depends on panel dimensions and lighting times. Solar panel which is planned into 5-40 Watt belonging inverter power 150 Watt, Solar Charge Controller and Acetic acid (12V, 5Ah). This accuracy of all, hopely that we got a much of Currency so its output for the power plant solar cell could be accommodated clearly for maintaining solar panel indeed.
Development of Renewable Photobioreactor (FBR) Technology with Fluid Hydrodynamics System-Online Monitoring Microcontroller as SNI Standardized Pure Oxygen Producer Hadiningrat, Mahendra Satria; Sari, Mayang; Sunardi, Ninik Nigusti Ayu
Jurnal IPTEK Vol 26, No 2 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i2.3373

Abstract

This photobioreactor research was carried out using Chlorella vulgaris algae as an O2-producing reactor and optimizing light energy as its energy source, with dimensions of 40x50x60 cm with control of pH, temperature, and chemical visibility factors. Variations are given by providing a supply of CO2 in both types of photobioreactors. Then it can be seen the concentration of O2 produced from the photobioreactor and its ability to overcome CO2 gas emissions. The use of glass as a reactor-making material is because glass is able to absorb visible light wavelengths in the range of 400–750 nm where at that wavelength microalgae can live and reproduce well. Before selecting the lamp used for the photobioreactor system. Measurements were carried out on two photobioreactors, namely, photobioreactors supplied and not supplied with CO2, and using three types of light sources, namely halogen lamps, LEDs, and sunlight. The maximum oxygen concentration value was produced by the photobioreactor supplied with CO2. The average percent error of the designed tool is 1.383% which is obtained by comparing the value of the designed tool with the reference measuring instrument.
Co-Authors Eggi Aunur Rofiq Mayang Sari Sunardi, Ninik Nigusti Ayu