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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Institute of Intelligent Systems
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Korean Institute of Intelligent Systems
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Volume & Issues
Volume 26, Issue 3 - Jun 2016
Volume 26, Issue 2 - Apr 2016
Volume 26, Issue 1 - Feb 2016
Selecting the target year
Forecasting the Precipitation of the Next Day Using Deep Learning
Ha, Ji-Hun ; Lee, Yong Hee ; Kim, Yong-Hyuk ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 93~98
DOI : 10.5391/JKIIS.2016.26.2.093
For accurate precipitation forecasts the choice of weather factors and prediction method is very important. Recently, machine learning has been widely used for forecasting precipitation, and artificial neural network, one of machine learning techniques, showed good performance. In this paper, we suggest a new method for forecasting precipitation using DBN, one of deep learning techniques. DBN has an advantage that initial weights are set by unsupervised learning, so this compensates for the defects of artificial neural networks. We used past precipitation, temperature, and the parameters of the sun and moon`s motion as features for forecasting precipitation. The dataset consists of observation data which had been measured for 40 years from AWS in Seoul. Experiments were based on 8-fold cross validation. As a result of estimation, we got probabilities of test dataset, so threshold was used for the decision of precipitation. CSI and Bias were used for indicating the precision of precipitation. Our experimental results showed that DBN performed better than MLP.
Development of On-In-One Web Solution for Technology Marketing
Choi, Ssang-Yong ; Kim, Dong-Sub ; Park, Sun-Seong ; Kim, Won-Ju ; Choi, Si-Woong ; Hwang, Seung-Gook ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 99~104
DOI : 10.5391/JKIIS.2016.26.2.099
This paper aims to develop the One-In-One web solutions that can work in PC, tablet, notebook, and smart phone depending on the flow of the ICT times to promote the marketing of the technology. The characteristics of this web solutions can be used to a image viewer system of 3D array type for PC, tablet, notebook, and smart phone. It is implemented in the design of 3D display slide show type. And it is developed an image viewer system, which enables users to use by utilizing the links manner ICT base required by each channel of the image. This is the 3D photo viewer PR solution developed in the way that anyone can use easily without the knowledge of programming in various areas such as public relations, business, and education.
Experimental Setup for Autonomous Navigation of Robotic Vehicle for University Campus
Cho, Sung Taek ; Park, Young Jun ; Jung, Seul ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 105~112
DOI : 10.5391/JKIIS.2016.26.2.105
This paper presents the experimental setup for autonomous navigation of a robotic vehicle for touring university campus. The robotic vehicle is developed for navigation of specific areas such as university campus or play parks. The robotic vehicle can carry two passengers to travel short distances. For the robotic vehicle to navigate autonomously the specific distance from the main gate to the administrative building in the university, the experimental setup for SLAM is presented. As an initial step, a simple method of following the line detected by a single camera is implemented for the partial area. The central line on the pavement colored with two kinds, red and yellow, is detected by image processing, and the robotic vehicle is commanded to follow the line. Experimental studies are conducted to demonstrate the performance of navigation as a possible touring vehicle.
Key Re-distribution Scheme of Dynamic Filtering Utilizing Attack Information for Improving Energy Efficiency in WSNs
Park, Dong-Jin ; Cho, Tae-Ho ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 113~119
DOI : 10.5391/JKIIS.2016.26.2.113
Wireless sensor networks are vulnerable to an adversary due to scarce resources and wireless communication. An adversary can compromise a sensor node and launch a variety of attacks such as false report injection attacks. This attack may cause monetary damage resulting in energy drain by forwarding the false reports and false alarms at the base station. In order to address this problem, a number of en-route filtering schemes has been proposed. Notably, a dynamic en-route filtering scheme can save energy by filtering of the false report. In the key dissemination phase of the existing scheme, the nodes closer to the source node may not have matching keys to detect the false report. Therefore, continuous attacks may result in unnecessary energy wastage. In this paper, we propose a key re-distribution scheme to solve this issue. The proposed scheme early detects the false report injection attacks using initially assigned secret keys in the phase of the key pre-distribution. The experimental results demonstrate the validity of our scheme with energy efficiency of up to 26.63% and filtering capacity up to 15.92% as compared to the existing scheme.
Design of RBFNNs Pattern Classifier Realized with the Aid of Face Features Detection
Park, Chan-Jun ; Kim, Sun-Hwan ; Oh, Sung-Kwun ; Kim, Jin-Yul ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 120~126
DOI : 10.5391/JKIIS.2016.26.2.120
In this study, we propose a method for effectively detecting and recognizing the face in image using RBFNNs pattern classifier and HCbCr-based skin color feature. Skin color detection is computationally rapid and is robust to pattern variation for face detection, however, the objects with similar colors can be mistakenly detected as face. Thus, in order to enhance the accuracy of the skin detection, we take into consideration the combination of the H and CbCr components jointly obtained from both HSI and YCbCr color space. Then, the exact location of the face is found from the candidate region of skin color by detecting the eyes through the Haar-like feature. Finally, the face recognition is performed by using the proposed FCM-based RBFNNs pattern classifier. We show the results as well as computer simulation experiments carried out by using the image database of Cambridge ICPR.
Robust Position Control of a Reaction Wheel Inverted Pendulum
Park, Sang-Hyung ; Lee, Hae-Chang ; Lim, Seong-Muk ; Kim, Jung-Su ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 127~134
DOI : 10.5391/JKIIS.2016.26.2.127
This paper presents a robust control of a reaction wheel inverted pendulum. To this end, a mathematical model is derived using physical laws, and then parameters in the model are identified as well. Based on the model, a robust position control is designed, which consists of two parts: swing-up control using passivity and robust stabilization control using LMI (Linear Matrix Inequality). When the pendulum starts to move, the swing-up control is applied. If the position of the pendulum is near the desired upright position, the control is switched to the robust stabilization control. This robust control is employed in order to deal with the uncertainties in the inertia of the pendulum dynamics. The performance of the proposed control scheme is validated not only simulation but also real experiment.
Static Corrective Controllers for Implementing Fault Tolerance in Asynchronous Sequential Circuits
Yang, Jung-Min ; Kwak, Seong Woo ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 135~140
DOI : 10.5391/JKIIS.2016.26.2.135
Corrective controllers enable fault diagnosis and tolerance for various faults in asynchronous sequential circuits without resort to redesign. In this paper, we propose a static corrective controller in order to decrease the size of the controller. Compared with dynamic controllers, static controllers can be made using only combinational circuits, as they need no inner states. We address the existence condition and design procedures for static corrective controllers that overcome state transition faults. To show the validity and advantage, the proposed controller is applied to an SEU error counter implemented on FPGA.
Technology Strategy based on Patent analysis
Kim, Jong-Chan ; Lee, Joon-Hyuck ; Park, Sang-Sung ; Jang, Dong-Sik ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 141~146
DOI : 10.5391/JKIIS.2016.26.2.141
By occasion of propagation of 3D TV, technology of glassless 3D display is increasingly important. Currently, there was no lead technology In this technology. Thus it is important to develop differentiated technology for secure competitiveness. In this paper, We analyze patents for R&D strategy about glassless 3D display. Through Company-Technology matrix analysis and Patent trend analysis, We extract promising technology field and core technology. Lastly We suggest R&D strategy by using patent road map.
Development of a Robotic Hand using Shape Memory Alloy Actuators
Jeon, Chang Gook ; Yoo, Dong Sang ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 147~152
DOI : 10.5391/JKIIS.2016.26.2.147
Shape Memory Alloys (SMAs) undergo changes in shape and hardness when heated or cooled, and do so with great force. Since wire-type SMAs contract in length when heated and pull with a surprisingly large force and move silently, they can be used as actuactors which replace motors. These SMA actuators can be heated directly with electricity and can be used to create a wide range of motions. This paper presents the mechanical design and control for a three fingered, six degree-of-freedom robotic hand actuated by SMA actuators. Each finger has two joints and each joint is actuated with two tendons in the antagonistic manner. In order to create the sufficient force to make the smooth motion, the tendon is composed of two SMA actuators in parallel. For controlling the current to heat the SMA actuators, PWM drivers are used. In experiments, the antagonistic interaction of fingers are evaluated.
Mechanism of Omni-directional Personal Mobility Vehicle with Diagonal Driving
Park, Su-san ; Im, Dea-Yeong ; Cha, Hyun-Rok ; Ryoo, Young-Jae ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 153~159
DOI : 10.5391/JKIIS.2016.26.2.153
In this paper, a mechanism of an omni-directional personal mobility which can drive diagonally is proposed. Mobility is a prerequisite involved in basic human life and activities. Personal mobility vehicle is a new mobility method which overcome the limits of automobiles. However, personal mobilities with four wheeled structure still have limitations. The proposed personal mobility vehicle can overcome the limitations of mobility because its rear wheels can be steered omni-directionally. In addition, the handicapped can drive it through a narrow road such as an alleyway or corridor and avoid obstacles on the traveling route. The proposed mechanism of personal mobility and the steering performance are tested by experiments, and the feasibility of diagonal driving is verified.
Localization of a Mobile Robot Using Ceiling Image with Identical Features
Noh, Sung Woo ; Ko, Nak Yong ; Kuc, Tae Yong ;
Journal of Korean Institute of Intelligent Systems, volume 26, issue 2, 2016, Pages 160~167
DOI : 10.5391/JKIIS.2016.26.2.160
This paper reports a localization method of a mobile robot using ceiling image. The ceiling has landmarks which are not distinguishablefrom one another. The location of every landmark in a map is given a priori while correspondence is not given between a detected landmark and a landmark in the map. Only the initial pose of the robot relative to the landmarks is given. The method uses particle filter approach for localization. Along with estimating robot pose, the method also associates a landmark in the map to a landmark detected from the ceiling image. The method is tested in an indoor environment which has circular landmarks on the ceiling. The test verifies the feasibility of the method in an environment where range data to walls or to beacons are not available or severely corrupted with noise. This method is useful for localization in a warehouse where measurement by Laser range finder and range data to beacons of RF or ultrasonic signal have large uncertainty.