A water measuring instrument meat can be design using a copper electrode. This measuring instrument has a measuring range of 10 % to 85 %. This series of the instrument includes copper electrode sensor, ADC0804 circuit, AT89S52 microcontroller minimum system circuit, and 2x16 character LCD circuit. The response line starts from the electrode sensor circuit of the copper converts the water content of the meat into a voltage, then the voltage is forwarded to the ADC0804 which converts the analog signal into voltage into digital data. The digital data obtained is then sent to the AT89S52 microcontroller to be processed into digital data in the form of digit display and letters on 2x16 character LCD. The display of numbers and letters on the 2x16 LCD shows the measured water content of the meat, the design tool utilizes the characteristics of a copper electrode sensor that produces a voltage change proportional to the change in the water content of the detected meat. Compatibility of design tool with the laboratory method obtained from the result of linear regression analysis of test data that is equal to 99,99%.
It has been successfully designed a temperature monitoring instrument through android application using LM35 sensor and SIM800L module based on ATMega16 microcontroller. The temperature is measured using a LM35 sensor which produces a voltage and sent to ADC. Microcontroller ATMega16 is using as the main processor of this monitoring instrument to calculate the program, so that analog data in the form of input voltage are converted into digital data form a measurable temperature. The measurable temperature is sent and saved in the database on the server computer using the SIM800L module so it can be displayed on the website. The website pages are accessed with android programs that installed on the smartphone so that measurable temperature data can be monitored using a smartphone. The measurable temperature results can be displayed on a 2x16-character LCD in the instrument designed. Compatibility of monitoring instrument with comparison instrument is 99,97 %.
The development of electronic technology in the era of globalization is very rapid. Utilization of this technology as a means to monitor soil conditions for agriculture, especially hydroponic plantations which are currently developing, to obtain optimal results it is necessary to monitor humidity and temperature conditions. This research will create a system that can maintain humidity and air temperature according to what plants need. The tools made consist of a temperature sensor, humidity sensor, ATMega328 microcontroller, ADC and water pump. Temperature and humidity sensors function to detect air temperature and humidity. The ADC functions to convert the voltage measurement results from temperature and humidity measurements into digital quantities which are then forwarded to the ATMega328 microcontroller to be processed into a digital display on the LCD. The ATMega328 microcontroller also regulates the ON and OFF of the water pump machine.
Breast cancer is a health problem in the world. To overcome this problem requires early detection of breast cancer. The purpose of this study is to classify early breast cancer grades. Combination of physical parameters with k-nearest neighbor Method is proposed to detect early breast cancer grades. The experiments were performed on 87 mammograms consisting of 12 mammograms of grade 1.41 mammograms of grade 2 and 34 mammogram of grade 3. The proposed method was effective to classify the grades of breast cancer by an accuracy of 64.36%, 50% sensitivity and 73.5% specitifity. Physical parameters can be used to classify grades of breast cancer. The results of this study can be used to complement the diagnosis of breast mammography examination.
The development of communication technology and science in this globalization era is very rapid. In utilizing this technology using laptops and the internet using Web as a means to monitor wind speed data in real-time. Wind measurement using an anemometer is a field from the weather forecasting agency by making an intermediary tool similar to the one on the weather forecast station using a simple anemometer that is connected to the laptop as a data observer. Anemometer or cup type wind sensor that has 3 cup counter wind speed gauges. In addition to using wind sensors, it is also needed ATmega328 microcontroller, SIM800L, and DHT11 sensors. Besides being able to measure wind speed in real time this tool can also measure air temperature and humidity. Wind speed measurement data can be accessed through a database and web that can be accessed on a server computer.
Abstrak -Telah dilakukan penelitian untuk mengetahui efek paparan medan magnet pada reaksi biosintesis nanopartikel emas (AuNP) menggunakan ekstrak daun Sambiloto (Andrographis paniculata ness). Pengamatan dilakukan dengan dua tahap, yaitu optimasi dan laju sintesis. Tahap optimasi dilakukan pada variasi rasio sintesis (larutan AuCl3 (dalam μl) : ekstrak daun Sambiloto (dalam ml)) masing-masing yaitu 2: 10, 5:10, 10:10, 15:10, 20:10, 30:10 dan 40:10. Hasil yang diperoleh dari tahap optimasi digunakan pada tahap penentuan laju reaksi sintesis dan selanjutnya digunakan untuk mempelajari efek paparan medan magnet terhadap laju reaksi sintesis AuNP tersebut. Besar medan magnet yang digunakan adalah 1,5 mT dengan lama paparan 12 jam. Hasil sintesis tersebut dikarakterisasi menggunakan spektrofotometer UV-Vis dengan hasil yaitu nilai absorbansi sebagai fungsi dari panjang gelombang Surface Plasmon Resonance (SPR). Tahap optimasi diperoleh bahwa rasio volume sintesis 30 l : 10 ml memberikan nilai absorbansi terbesar untuk waktu sintesis ± 1 jam. Tahap laju reaksi diperoleh bahwa waktu optimum untuk sintesis AuNP adalah 1 jam baik tanpa dan dengan efek paparan medan magnet, dengan karakteristik panjang gelombang SPR dan nilai absorbansinya adalah tanpa medan 535,5 nm, 0,938 a.u. dan dengan medan 526,0 nm, 0,880 a.u. Kata kunci: Medan magnet, UV-Vis, ekstrak daun Sambiloto, nanopartikel emas (AuNP), absorbansiAbstract -A Research has been conducted to determine the effect of magnetic field exposure on the biosynthesis reaction of gold nanoparticles (AuNP) using Sambiloto leaf extract (Andrographis paniculata ness). The observations were made in two stages, namely optimization and synthesis rate. The optimization stage is carried out in a variation of the synthesis ratio (AuCl 3 solution (in μl): Sambiloto leaf extract (in ml)) which are 2: 10, 5:10, 10:10, 15:10, 20:10, 30:10 and 40:10. The results obtained from the optimization stage are used at the stage of determining the rate of synthesis reaction and then used to study the effect of magnetic field exposure on the rate of the AuNP synthesis reaction. The magnitude of the magnetic field used is 1.5 mT and exposure time of 12 hours. The synthesis results were characterized using UV-Vis spectrophotometer with the result that the absorbance value is a function of the wavelength of Surface Plasmon Resonance (SPR). The optimization phase was obtained that the synthesis volume ratio of 30 μl: 10 ml gave the greatest absorbance value for the synthesis time of ± 1 hour. The reaction rate stage was obtained that the optimum time for AuNP synthesis was 1 hour both without and with the effect of magnetic field exposure, with the characteristic wavelength of the SPR and its absorbance value without the field of 535.5 nm, 0.938 a.u. and with a field of 526.0 nm, 0.880 a.u.
The power plant has been created with turbine ventilator as a source of electrical energy for lighting. Voltage generator generated when wind speed between 0 m/s up to 6 m/s with no given load is between 0 volts up to 8.38 volts. Generator-generated electricity can be utilized in everyday life after going through several processes like converting the voltage from DC to AC by using a DC to AC inverter and increasing the AC voltage to a 220-volt voltage using a transformer. In this study using 5 watts LED lamp that can be used to help to light.
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