Identifikasi Unsur-Unsur Berdasarkan Spektrum Emisi Menggunakan Jaringan Syaraf Tiruan

---Neural network program for elements identification based on its emission spectrum has been made using backpropagation method. The programming language which was used is MATLAB 7.0. This neural network has a single hidden layer. Training and testing data are emission spectrum data which are emission wavelength from each element. Training process was done by introducing known emission spectrum data to neural network program. Neural network program has been successful to identify elements based on its emission spectrum. Training process will be faster if we adjust the number of hidden layer's neuron as 100, the value of learning rate as 0,049 and the value of momentum as 0,98. The neural network accuracy of identifying elements is determined by the value of error target. Error target. The value of target error about 10-2 has accuracy 97,14% and the value of target error about 10-4 has accuracy 100%

Sistem Monitoring Kendaraan secara 3D dengan Sensor Tekanan Udara dan Global Positioning System (GPS) Berbasis Web secara Realtime

A research on telemetry or remote measurement has been conduced, for the parameters of the position of a moving object, ie the vehicle. Parameters such as latitude and longitude position is obtained from the GPS receiver (Global Positioning System). GPS receiver is used Ublox Noe 6 M. In addition it's also added a altitude parameter, which is obtained by converting the changes of air pressure. Sensor BMP180 used to measure air pressure. Both of these devices are read and controlled by a microcontroller ATmega328 with the Arduino software. The GPS receiver to get latitude and longitude coordinates from the satellite. Coodinates data is sent to a microcontroller, combined with altitide data, then data sent to the database server using internet with GSM network. In this system used web interface that allows users to monitor the position of the vehicle, without necessary for special receiving station. Based on the results of validation latitude and longitude coordinates from the GPS receiver, with GARMIN GPS devices with the GPSMAP 78s series, this GPS receiver has the highest standart deviation ± 0.000006 degrees for the longitude and ± 0.000012 for latitude. The position of the vehicle in form of latitude and longitude coordinates, then illustrated on Google Maps. The results of this study, acqusition system that has been mounted on the vehicle position coordinates can transmit data to the server, and the data transmission process becomes faster and cheaper. This system will continue sends the data for vehicles that are in the area covered by the GSM network provider. Lack of this system is data transmission medium that is highly dependent on the availability of the GSM network. If the GSM network is weak, it can cause failures in data transmission

Sistem Monitoring dan Otomasi Pengontrolan Kelembaban Media Tanam (Soil Moisture) pada Tanaman Hidroponik Berbasis Web

A web based system design for soil moisture monitoring and automation was conducted on this research. Soil moisture level controlling is highly needed to optimalize plant cultivation result. The system contains of two main parts, a remote terminal unit (RTU) and control terminal unit (CTU). RTU has an ATSAM3X8E microcontroller and a microprocessor used for acquiring and sending soil moisture level to database using internet connection. Using internet as telemetry connection is really efficient and gives many advantages such as measurement could be done in distance and also has realtime result. YL-69 sensor used for soil moisture level measurement gives resistance as the output value. This sensor has a module with a 10K ohm voltage devider resistor. The output sensor value converted into digital value using microcontroler analog to digital converter (ADC). This result then being compared with setpoint value to decide whether the water pump turning on or off. The output sensor value also sent and then saved in online database system through internet connection. A reference was used for determining sensor characterization with the linier formulation y = -0.0245x + 99.9560. The result between sent and received data has no error, so there were no lost or gain data. The response from the sensor tested at setpoint value in 30, 40 and 50 giving errors 3.3%, 6.5% and 10.7% for each value. The system reponse tests showed that in a low setpoint value the system gave a very close value with the setpoint, but as the increasement of the setpoint value, the system got error increasement either

Pemindaian dan Pengolahan Label Keamanan pada Dokumen Rahasia dengan Titik Kuantum

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\u27s 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 sampl

Wireless Sensor System untuk Pengukuran Daya Listrik Panel Surya

In this research, wireless sensor system is used to electrical power of solar cell measurement with wirelessly through of WiFi as data transmision. This system is required to monitoring and measuring electrical power of solar cell with long distance. This system also very helpful personil to do measurement because could be solving a problem in personnel limitations and instrument limitations. So, wireless sensor system become a solution in measurement. The system is made from voltage sensor circuit and current sensor circuit. Sensors are connected to ADC ATSAM3X8E microcontroller. Microcontroller reads voltage and current values by converting the analog scale to digital for sent to computer. Then, the data was saved in database and was sent to central station. Data has sent wirelessly by WiFi which is could be shown via web browser on computer. The result of calibration voltage sensors has correlation 0.9885 to standard gauge and average error 0.013 volts. The result of calibration current sensor has correlation 0.9881 to standard gauge and average error 0.012 ampere. The result of comparison beetween data which is sent from the field and received data has 0% error. So, it could be say that there is no placement data error

Rancang Bangun Sistem Pengaturan Kelembaban Tanah secara Real TIME Menggunakan Mikrokontroler dan Diakses di Web

A research on telemetry or remote measurement, for the parameters of soil moisture and temperature of the object remains in the form of agricultural land. The measured parameters such as soil moisture values are obtained from soil moisture sensors. In addition added also parameter value air temperature obtained by measuring the air temperature. In order to measure the air suh used sensor DS18B20. Both of the devices are read and controlled by a microcontroller ATmega328 with the Arduino software. Recipients get the value of soil moisture humidity value from the sensor. Data such as soil moisture and temperature value of the air is sent to the microcontroller, then transmitted to the database server by using the Internet network GSM. The system will be automatically watering when the soil moisture values are below standard. The system is using web interface that allows users to monitor soil conditions without the need for special receiver station. The results of this study, the system can perform the measurement values of soil moisture and air temperature to the server and perform automatic watering. This reasearch used three medium, wherein each soil moisture rises up to 99% in the first and second medium, in the third medium soil moisture rises up to 97%. The increase in the value of soil moisture caused by the automatical watering is based on parameter moisture used

Pembuatan Sistem Ozonizer untuk Degradasi Pewarna Rhodamine B dengan Metode Peroxone Menggunakan Mikrokontroler ATMEGA 8535

The decrease of the quality water is caused by the dye waste of rhodamine B that found in liquid waste. One of the ways to treat that liquid waste is using the peroxone process that combines ozone (O3) and hydrogen peroxide (H2O2). The production of ozonizer system is vital due to its effectivity. The system is made by adding the microcontroller of Atmega 8535 as a timing controller that can adjust the duration of ozonizer system work. In addition, the concentration of H2O2 and the optimization of ozonation process were done to produce the most optimal degradation. The optimal ozone generator works on the frequency of 3500 Hz while the power is 2.15 Watt, 3576 V of voltage, and 0.6 mA of current with the average ozone production reaching 266 ppm every 30 minutes. The greater concentration of H2O2 that used and the longer ozonation time will increase the percentage degradation of rhodamine B. The greatest degradation percentage was achieved at the H2O2 concentration of 2500 ppm. The rhodamine B of 20 ppm was successfully degraded with the highest degradation percentage reaching 97% for 150 minutes