Sistem Keamanan Pintu Laboratorium Berbasis Sensor Fingerprint dan Magnetic Lock

Abstrak-- Sistem pintu keamanan di laboratorium biasanya menggunakan kunci konvensional. Departemen Teknik Listrik dan Informatika, Perguruan Tinggi Kejuruan, Universitas Gadjah Mada memiliki 24 laboratorium dan puluhan ruang kelas. Semakin tinggi jumlah laboratorium dan ruang kelas, semakin banyak kunci yang dibutuhkan. Kendala yang dihadapi oleh asisten laboratorium adalah sulitnya menemukan kunci dan kehilangan kunci.Salah satu cara mengatasi masalah di atas membuat sistem penguncian pintu otomatis menggunakan sensor sidik jari. Sistem ini bertujuan untuk meningkatkan keamanan dan memfasilitasi akses untuk mengunci ruangan. Sistem ini dibuat menggunakan mikrokontroler sebagai prosesor dan sensor sidik jari. Identitas pengakses laboratorium disimpan dalam memori untuk membuka kunci pintu. Di pintu masuk, pintu kunci magnetik dipasang, yang terhubung ke sistem mikrokontroler. Sistem dapat berjalan seperti yang dimaksudkan dan dapat mendeteksi sidik jari yang tersimpan dalam memori. Sistem dapat mengidentifikasi sidik jari pengguna yang disimpan dalam memori dengan persentase keberhasilan 95% dari total 40 percobaan membuka kunci.Kata Kunci: Sidik Jari, Kunci Magnetic, Mikrokontroller, Sistem Kunci Pintu, Keamana

Fuzzy-based frost filter for speckle noise reduction of Synthetic Aperture Radar (SAR) image

The Synthetic Aperture Radar (SAR) image is a high-resolution image and is less influenced by weather conditions either day or night compared to the optical image. SAR image, because of its advantages, is becoming more popular than the optical image in the remote sensing area for earth observation study. However, the speckle noise that occurs in the SAR image causes difficulties in image interpretation, and speckle noise reduction process has become necessary before of the usage of SAR image. The ideal speckle filter has the capability of reducing speckle noise without losing the information and preserving its texture. This study proposes the use of speckle noise filter that as nearly possible to meet those criteria. This research has investigated the performance of existing filter, which was Frost, Lee, Kuan, and Median, and had applied it to ALOS-PALSAR images with homogeneous and heterogeneous earth area surfaces in Kuantan, Pahang, Malaysia. Filtered image is measured and evaluated using image quality parameters to show the performance of the filters in reducing speckle noise and preserving the texture. The parameter used for filters evaluation performances are Equivalent Number of Looks (ENL), Speckle Index (SI), Mean, Standard Deviation and Variance. The experiment results showed that Frost filter has better results compared to others and has been selected as the qualified existing filter. The Frost filter was modified by applying the fuzzy approach which was aimed at eliminating speckle noise while maintaining texture. There are four combinations of proposed filter, which are Frost-ATMAV, Frost-ATMED, Frost-TMAV, and Frost-TMED combination. Based on the results of comparison and evaluation of the filters, Frost-TMAV combination has been selected as the best-proposed filter. It had improved the performance of Frost filters for each parameter's measurement; it showed the improvement value of 19.47% for ENL, 8.48% for SI, 2.56% for mean, 6.15% for standard deviation and 2.00% for a variance, applied into homogeneous areas of ALOS-PALSAR images. While when used with heterogeneous areas, it improved 9.54% for ENL, 4.41% for SI, 3.03% for mean, 1.51% for standard deviation and 2.96% for the variance. It has been verified that the Frost-TMAV could be used for ALOS-PALSAR data pre-processing, which means that this filter can produce good-quality images based on parameters used when compared with other filters

ANALISIS KINERJA BERBASIS KOMUNIKASI KEPEMIMPINAN DAN GAYA KEPEMIMPINAN DENGAN MOTIVASI SEBAGAI VARIABEL INTERVENING

This research aims to know: (1) influence of leadership communication toward employee’s motivation and performance (3) influence of leadership style toward  employee’s motivation and performance (5) influence of motivation toward employee’s performance at BUKP DIY of Bantul Regency. This research was explanatory research by using quantitative approach. Population of the research was all employees of BUKP DIY in Bantul Regency as total of 77 people. Sampling technique in this research was by non-probability sampling model with number of sample was 77 people. Data collection was by questionnaire. Data analysis used SEM analysis. Result of the research shows that: (1) leadership communication has positive and significant influence toward employee’s motivation and performance (2) leadership style has positive and significant influence toward employee’s motivation and performance (3) motivation has positive and significant influence toward employee’s performance at BUKP DIY of Bantul Regency.   Keywords: leadership communication, leadership style, employee;s motivation and employee’s performanc

Sensor integration for real-time data acquisition in aerial surveillance

The unmanned aerial vehicle (UAV) is one of the mobile robots which has grown rapidly in popularity in recent years. UAVs have been used in various activities to convey important information on the aerial transportation system. However, an application to get real-time information from UAVs remains a challenging task. Therefore, this paper presents an integration system to optimise the use of UAVs for aerial surveillance. The proposed system explains the design and implementation a UAV system which consists of on-board and ground stations. The on-board system has the function to send UAV flight data, send aerial images and carry items using a gripper which equipped with sensors to detect obstacles. The ground station has the function to control UAV flights, receive and display UAV flight data and aerial images, display the attitude of the UAV and send commands to move the camera and gripper. Flight controllers in this system use non-linear complementary filter on SO(3) to estimate the attitude of the UAV and proportional-integral (PI) controller to stabilise the UAV flight. By providing the real-time acquisition data of the UAV, we believe this system can be a useful tool for many implementations using UAV

Sensor integration for real-time data acquisition in aerial surveillance

The unmanned aerial vehicle (UAV) is one of the mobile robots which has grown rapidly in popularity in recent years. UAVs have been used in various activities to convey important information on the aerial transportation system. However, an application to get real-time information from UAVs remains a challenging task. Therefore, this paper presents an integration system to optimise the use of UAVs for aerial surveillance. The proposed system explains the design and implementation a UAV system which consists of on-board and ground stations. The on-board system has the function to send UAV flight data, send aerial images and carry items using a gripper which equipped with sensors to detect obstacles. The ground station has the function to control UAV flights, receive and display UAV flight data and aerial images, display the attitude of the UAV and send commands to move the camera and gripper. Flight controllers in this system use non-linear complementary filter on SO(3) to estimate the attitude of the UAV and proportional-integral (PI) controller to stabilise the UAV flight. By providing the real-time acquisition data of the UAV, we believe this system can be a useful tool for many implementations using UAV