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INDONESIA
YOUNGSTER PHYSICS JOURNAL
Published by Universitas Diponegoro
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Core Subject : Science,
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Articles 12 Documents
Search results for , issue "Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015" : 12 Documents clear
RANCANG BANGUN SISTEM PENGHITUNG PENGGUNAAN AIR PRABAYAR MENGGUNAKAN MIKROKONTROLER PIC16F877A Faisal Rahman; Kusworo Adi
Youngster Physics Journal Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.771 KB)

Abstract

The water recording that still uses manual system has many shortcomings, including error recording by officer, inaccurate of water meter reading, so that many customers feel disadvantaged. The purpose of the research is to make water usage system that can minimalize Mistakes done by the Officers by making prepaid payment system. The water flowed ON flowmeter will rotate the rotor so that it can result clock that becomes input for PIC16F877A to be displayed ON LCD. The number of clock will be characterized with the amount of water that was released so it obtains equation. The equation is put on Program so LCD Output is the amount of water flowed ON flowmeter. The result from Flowmeter characterization is 0.999. The flowmeter test is done by comparing it with standard tools, it obtains correlation coefficient 0,996 with 1,3 % error and test cost is 0.05 %.
PEMINDAIAN DAN PENGOLAHAN LABEL KEAMANAN PADA DOKUMEN RAHASIA DENGAN TITIK KUANTUM Ratu Bilqis; Jatmiko Endro Suseno; Isnaeni Isnaeni
Youngster Physics Journal Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (676.335 KB)

Abstract

Security label is made to anticipate the increasing of documents falsification trend. In this study, the security label is created using CdSe quantum dots. The quantum dots can be used for casting light according to its wavelength so that the particle size can be specific. That’s why its worth to be security key from quantum dots. The quantum dots that be used is colloidal CdSe quantum dots with a wavelength of 595 nm and 526 nm. In the previous studies have been done the two-dimensional scanning process of quantum dots for one color as a security label. However, the results obtained are not perfect because it has not done the repair process for the image resulted. Therefore, in this study conducted by the two-dimensional scanning of quantum dots in two colors to add a level of security on the label then followed by image processing in order to obtain a better image. Image processing which have been done by observing the histogram of the image in order to obtain a threshold value between the object and the background image. Scanning generate data in the form of a sequence intensity value corresponding to the color intensity of quantum dots to obtain image data processing results. Image processing through the observation of the histogram data successfully get the intensity threshold value so that the image can be processed to become more visible in accordance with the sample

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