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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Institute of Electronics and Information Engineers
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The Institute of Electronics Engineers of Korea
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Volume & Issues
Volume 53, Issue 9 - Sep 2016
Volume 53, Issue 8 - Aug 2016
Volume 53, Issue 7 - Jul 2016
Volume 53, Issue 6 - Jun 2016
Volume 53, Issue 5 - May 2016
Volume 53, Issue 4 - Apr 2016
Volume 53, Issue 3 - Mar 2016
Volume 53, Issue 2 - Feb 2016
Volume 53, Issue 1 - Jan 2016
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A Cooperative Energy-efficient Scheduling Scheme for Heterogeneous Wireless Networks
Kim, Hoon ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 3~8
DOI : 10.5573/ieie.2016.53.1.003
Wireless networks have evolved to the appearance of heterogeneous wireless networks(HetNet), where various networks provide data services with various data rates and coverage. One of technical issues for HetNet is efficient utilization of radio resources for system performance enhancement. For the next generation wireless networks, energy saving has become one of key performance indices, so energy-efficient resource management schemes for HetNet need to be developed. This paper addresses an energy-efficient scheduling for HetNet in order to improve the energy efficiency while maintaining similar system throughput as existing scheme, for which an energy-efficient scheduling that energy efficiency factor is included. Simulation results show that the proposed scheme achieves the reduction of energy consumption while admitting limited ragne of throughput degradation in comparison with the conventional proportional fair scheduling.
A OSPF Routing Scheme based on Energy Profiles and Its Characteristics for QoS-Aware Energy Saving(QAES) in IP Core Networks
Seo, Yusik ; Han, Chimoon ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 9~21
DOI : 10.5573/ieie.2016.53.1.009
Nowadays various methods for energy saving have been studied in IP networks. This paper suggests a 2-phase OSPF routing method for energy saving on IP networks having various energy profiles and analyzes its characteristics. The phase-1 of the routing is an OSPF routing method considering the energy cost of devices besides existing metrics to minimize energy consumption. In the phase-2 of the routing, it makes core nodes go into sleep sate for energy saving and reroutes the paths affected by sleeping core nodes. At this time, we confirm that the characteristics of mean delay and energy efficiency can be satisfied by limiting an allowable hop number in the reroute paths, and utilization rate of nodes and links for assuring energy saving and network-level QoS. Since the efficiency of energy saving and delay characteristics differ according to selection methods of core nodes to go into sleep state, it is that the a method of core node selection based on MP(minimum_path) is more excellent than others in terms of network-level QoS and energy saving in IP networks.
Omnidirectional Resonator in Three-Dimensional using a Globular Structure for Wireless Power Transfer
Kim, Donggeon ; Seo, Chulhun ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 22~26
DOI : 10.5573/ieie.2016.53.1.022
In this paper, using the globular structure designed and implemented for the transmitter and the receiver resonant wireless power transfer(WPT). The coil of the transmitter was proposed to emit a magnetic energy in three-dimensional space by winding a ball shape. Each side of the transmitter has been designed to obtain a high Q value by a spiral structure. This solves the problem that the transfer efficiency decreases rapidly depending on the location in the conventional WPT. The resonance frequency is used 6.78 MHz and the distance between the trasnitter and the receiver is 200 mm. The transfer efficiency of the proposed WPT system is higher than 40% at all direction.
A Study on the Integrated-Optical Electric-Field Sensor utilizing Ti:LiNbO
Y-fed Balanced-Bridge Mach-Zehnder Interferometric Modulators
Jung, Hongsik ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 29~35
DOI : 10.5573/ieie.2016.53.1.029
We have demonstrated a
electro-optic electric-field sensors utilizing a
Y-fed balanced-bridge Mach-Zehnder interferometric (YBB-MZI) modulator which uses a 3-dB directional coupler at the output and dipole patch antenna. The operation and design were proved by the BPM simulation. A dc switching voltage of ~16.6 V and an extinction ratio of ~14.7 dB are observed at a wavelength of
. For a 20 dBm rf power, the minimum detectable electric-fields are ~1.12 V/m and ~3.3 V/m corresponding to a dynamic range of about ~22 dB and ~18 dB at frequencies 10 MHz and 50 MHz, respectively. The sensors exhibit almost linear response for the applied electric-field intensity from 0.29 V/m to 29.8 V/m.
SLC Buffer Performance Improvement using Page Overwriting Method in TLC NAND Flash-based Storage Devices
Won, Samkyu ; Chung, Eui-Young ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 36~42
DOI : 10.5573/ieie.2016.53.1.036
In multi-level-cell based storage devices, TLC NAND has been employed solid state drive due to cost effectiveness. Since TLC has slow performance and low endurance compared with MLC, TLC based storage has adopted SLC buffer scheme to improve performance. To improve SLC buffer scheme, this paper proposes page overwriting method in SLC block. This method provides data updates without erase operation within a limited number. When SLC buffer area is filled up, FTL should execute copying valid pages and erasing it. The proposed method reduces erase counts by 50% or more compared with previous SLC buffer scheme. Simulation results show that the proposed SLC buffer overwrite method achieves 2 times write performance improvement.
Power Optimization Method Using Peak Current Modeling for NAND Flash-based Storage Devices
Won, Samkyu ; Chung, Eui-Young ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 43~50
DOI : 10.5573/ieie.2016.53.1.043
NAND flash based storage devices adopts multi-channel and multi-way architecture to improve performance using parallel operation of multiple NAND devices. However, multiple NAND devices consume higher current and peak power overlap problem influences on the system stability and data reliability. In this paper, current waveform is measured for erase, program and read operations, peak current and model is defined by profiling method, and estimated probability of peak current overlap among NAND devices. Also, system level TLM simulator is developed to analyze peak overlap phenomenon depending on various simulation scenario. In order to remove peak overlapping, token-ring based simple power management method is applied in the simulation experiments. The optimal peak overlap ratio is proposed to minimize performance degradation based on relationship between peak current overlapping and system performance.
A Boundary-Scan Based On-Line Circuit Performance Monitoring Scheme
Park, Jeongseok ; Kang, Taegeun ; Yi, Hyunbean ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 51~58
DOI : 10.5573/ieie.2016.53.1.051
As semiconductor technology has developed, device performance has been improved. However, since device structures became smaller, circuit aging due to operational and environmental conditions can be accelerated. Circuit aging causes a performance degradation and eventually a system error. In reliable systems, a failure due to aging might cause a great disaster. Therefore, these systems need a performance degradation prediction function so that they can take action in advance before a failure occurs. This paper presents an on-line circuit performance degradation monitoring scheme for predicting a failure by detecting performance degradation during circuit normal operation. In our proposed scheme, IEEE 1149.1 output boundary scan cells and TAP controller are reused. The experimental result shows that the proposed architecture can monitor the performance degradation during normal operation without stopping the circuit.
A Design of Novel Instrumentation Amplifier Using a Fully-Differential Linear OTA
Cha, Hyeong-Woo ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 59~67
DOI : 10.5573/ieie.2016.53.1.059
A novel instrumentation amplifier (IA) using fully-differential linear operational transconductance amplifier (FLOTA) for electronic measurement systems with low cost, wideband, and gain control with wide range is designed. The IA consists of a FLOTA, two resistor, and an operational amplifier(op-amp). The principal of the operating is that the difference of two input voltages applied into FLOTA converts into two same difference currents, and then these current drive resistor of (+) terminal and feedback resistor of op-amp to obtain output voltage. To verify operating principal of the IA, we designed the FLOTA and realized the IA used commercial op-amp LF356. Simulation results show that the FLOTA has linearity error of 0.1% and offset current of 2.1uA at input dynamic range
. The IA had wide gain range from -20dB to 60dB by variation of only one resistor and -3dB frequency for the 60dB was 10MHz. The proposed IA also has merits without matching of external resistor and controllable offset voltage using the other resistor. The power dissipation of the IA is 105mW at supply voltage of
The Artificial Neural Network based Electric Power Demand Forecast using a Season and Weather Informations
Kim, Meekyeong ; Hong, Chuleui ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 71~78
DOI : 10.5573/ieie.2016.53.1.071
This paper proposes the new electric power demand forecast model which is based on an artificial neural network and considers time and weather factors. Time factors are selected by measuring the autocorrelation coefficients of load demand in summer and winter seasons. Weather factors are selected by using Pearson correlation coefficient The important weather factors are temperature and dew point because the correlation coefficients between these factors and load demand are much higher than those of the other factors such as humidities, air pressures and wind speeds. The experimental results show that the proposed model using time and seasonal weather factors improves the load demand forecasts to a great extent.
LED-to-LED Two Way Visible Light Communication System
Jo, Seung Wan ; Oh, Hoon ; Lee, Yeon Jae ; Le, The Dung ; An, Beongku ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 79~85
DOI : 10.5573/ieie.2016.53.1.079
Recently, visible light communication(VLC) is being actively researched as green wireless communication services are drawing attention. Currently, VLC mostly uses LED for transmission and PD(Photo Diode) for receiving. However, this kind of system has limited applications. Therefore, we design and propose in this paper, a LED-to-LED two way VLC system that doesn`t use PD(Photo Diode). This system has the following features and contributions. First, this system uses just LED at both transmitter and receiver with analog switch, Second, this system support both one-way communication and two way communication together. One way communication can support multi-hop communication. The performance evaluation of the proposed system is conducted at a place with standard light. We test the success or failure of one way communication by changing distance and baud rate while test the success and failure of two way communication by changing distance. We expect that the proposed LED-to-LED system in this paper can be applied for various application fields.
Performance Evaluation and Analysis for Block I/O Access Pattern between KVM-based Virtual Machine and Real Machine in the Virtualized Environment
Kim, Hyeunjee ; Kim, Youngwoo ; Kim, Youngmin ; Choi, Hoonha ; No, Jaechun ; Park, Sungsoon ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 86~96
DOI : 10.5573/ieie.2016.53.1.086
Recently, virtualization is becoming the critical issue in the cloud computing due to its advantages of resource utilization and consolidation. In order to efficiently use virtualization services, several issues should be taken into account, including data reliability, security, and performance. In particular, a high write bandwidth on the virtual machine must be guaranteed to provide fast responsiveness to users. In this study, we implemented a way of visualizing comparison results between the block write pattern of KVM-based virtual machine and that of the real machine. Our final objective is to propose an optimized virtualization environment that enables to accelerate the disk write bandwidth.
File Block Management for Energy-Efficient Distributed Storages
Suh, Min-Kook ; Kim, Seong-Woo ; Seo, Seung-Woo ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 97~104
DOI : 10.5573/ieie.2016.53.1.097
Because of rapid growth of data size, the number of data storage has been increased. When using multiple data storages, a distribute file system is essential to insure the availability of data files. The power consumption is a major problem when using a distributed file system with many data storages. Previous works have aimed at reducing the energy consumption with efficient file block layout by changing some data servers into stand-by mode. The file block migration has not been seriously considered because migration causes large cost. But when we consider addition of a new data server or file, file block migration is needed. This paper formulates the minimization of data block migration as an ILP optimization problem and solves it using branch-and-bound method. Using this technique, we can maximize the number of stand-by data servers with the minimum number of file block movement. However, computation time of branch-and-bound method of an ILP optimization problem increases exponentially as the problem size grows. Therefore this paper also proposes a data block and data server grouping method to solve many small ILP problems.
Adaptive Defect Detection Method based on Skewness of the Histogram in LCD Image
Gu, Eunhye ; Park, Kil-Houm ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 107~117
DOI : 10.5573/ieie.2016.53.1.107
STD method using a mean and standard deviation is widely used in various inspection systems. The result of detection using the STD method is very dependent on the threshold value. This paper proposes an adaptive defect detection algorithm to with a precise detection of an ultimate defect. The proposed method is determined threshold value adaptively using a skewness that indicates a similarity of intensity and normal distribution of image. In the experiment, we used a various TFT-LCD images for a quantitative evaluation of defect detection performance evaluation result to prove the performance of the proposed algorithm.
Markerless Image-to-Patient Registration Using Stereo Vision : Comparison of Registration Accuracy by Feature Selection Method and Location of Stereo Bision System
Joo, Subin ; Mun, Joung-Hwan ; Shin, Ki-Young ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 118~125
DOI : 10.5573/ieie.2016.53.1.118
This study evaluates the performance of image to patient registration algorithm by using stereo vision and CT image for facial region surgical navigation. For the process of image to patient registration, feature extraction and 3D coordinate calculation are conducted, and then 3D CT image to 3D coordinate registration is conducted. Of the five combinations that can be generated by using three facial feature extraction methods and three registration methods on stereo vision image, this study evaluates the one with the highest registration accuracy. In addition, image to patient registration accuracy was compared by changing the facial rotation angle. As a result of the experiment, it turned out that when the facial rotation angle is within 20 degrees, registration using Active Appearance Model and Pseudo Inverse Matching has the highest accuracy, and when the facial rotation angle is over 20 degrees, registration using Speeded Up Robust Features and Iterative Closest Point has the highest accuracy. These results indicate that, Active Appearance Model and Pseudo Inverse Matching methods should be used in order to reduce registration error when the facial rotation angle is within 20 degrees, and Speeded Up Robust Features and Iterative Closest Point methods should be used when the facial rotation angle is over 20 degrees.
A Design of Standing Human Body Sensing System Using Rotation of a PIR Sensor
Cha, Hyeong-Woo ; Cho, Min-Yyeong ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 129~136
DOI : 10.5573/ieie.2016.53.1.129
A novel sensing system for standing and moving human body using PIR(pyroelectric infrared) sensor was development. The system consists of power supply, interface circuit of PIR sensor, small stepping motor, and digital control. The detecting principle for stop human body is detecting the human body when the stepping motor sticking the PIR sensor and the fresnel lens has rotated by 180 degree at six second and has stopped the motor for no detecting signal of human body. We developed control algorism for proposed the detection system. The experimentation shows that the detector system had detected length and angle were 6m and 30 degree against as standing and moving human body with
A Functional Circuits Design of Variable Frequency Switching type DC-DC Converter Integrated Circuit
Lee, Jun-sung ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 139~144
DOI : 10.5573/ieie.2016.53.1.139
This paper describes functional circuits of DC-DC converter IC incorporated with variable frequency PFM technique. In case of output voltage of DC-DC converter is reached setting value or output current is low then PFM switching frequency is slow down. In this work a PFM signal generator, a PFM Frequency Control Circuit, an output voltage detector and an over current protection circuits are designed. This device has been designed at a
, double poly, double metal 12[V] CMOS process.
The Development of LED Lighting Controller based on the PAN
Ohm, Woo-Yong ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 145~152
DOI : 10.5573/ieie.2016.53.1.145
The usage of LED(Light Emitting Diode) has been rapidly increased and energy efficient management of LED light system is regarded as an important technology to enhance the energy efficiency. In this paper, we design and implementation of LED lighting controller which can control the LED lighting by using the wire and wireless communication technology based on the LAN(Local Area Network) and PAN(Personal Area Network). The implemented system can reduce the cost of LED lighting installing and avoids complicated wiring problem. And it is possible to minimize power consumption through automatic or manual LED control that they wished. In experimental results, the implemented LED lighting controller was satisfactory for all of the desired functions.
Detection of Fallen Pear Bags caused by Natural Disaster
Choi, Doo-Hyun ;
Journal of the Institute of Electronics and Information Engineers, volume 53, issue 1, 2016, Pages 153~158
DOI : 10.5573/ieie.2016.53.1.153
A detection algorithm of fallen pear bags caused by natural disaster like heavy rain, typhoon, hurricane, etc. is presented in this paper. The algorithm is developed for the gray pear bags with printed characters which are widely used at pear farms at Sangju and Naju producing large quantity of pears for export. It sets a region of interest (ROI) at first and then eliminates the regions having chromatic color in ROI. Morphological operation and prior information are used to eliminate small noises and several unusual regions and finally the regions of fallen pear bags are remained. The remained regions are analyzed and counted to estimate the scale of damage. Test images are consisted of the images taken at pear farms of Sangju and Naju at 2014. Experimental result shows that the detection rate of pear bags is more than 90% and also the proposed system can be implemented in real-time using hand-held devices because of its simple and parallel architecture.