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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 50, Issue 12 - Dec 2013
Volume 50, Issue 11 - Nov 2013
Volume 50, Issue 10 - Oct 2013
Volume 50, Issue 9 - Sep 2013
Volume 50, Issue 8 - Aug 2013
Volume 50, Issue 7 - Jul 2013
Volume 50, Issue 6 - Jun 2013
Volume 50, Issue 5 - May 2013
Volume 50, Issue 4 - Apr 2013
Volume 50, Issue 3 - Mar 2013
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Volume 50, Issue 1 - Jan 2013
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Implementation of Viterbi Decoder on Massively Parallel GPU for DVB-T Receiver
Lee, KyuHyung ; Lee, Ho-Kyoung ; Heo, Seo Weon ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 3~11
DOI : 10.5573/ieek.2013.50.9.003
Recently, a plenty of researches have been conducted using the massively parallel processing of GPU for the implementation of communication system. In this paper, we tried to reduce software simulation time applying GPU with sliding block method to Viterbi decoder in DVB-T system which is one of European DTV standards. First of all, we implement DVB-T system by CPU and estimate cost time whereby the system processes one OFDM symbol. Secondly, we implement Viterbi decoder by software using NVIDIA`s massive GPU processor. In our work, stream process method is applied to reduce the overhead for data transfer between CPU and GPU, as well as coalescing method to lower the global memory access time. In addition, data structure design method is used to maximize the shared memory usage. Consequently, our proposed method is approximately 11 times faster in 2K mode and 60 times faster in 8K mode for the process in Viterbi decoder.
Zeroth-Order Resonant Antenna with Frequency Reconfigurable Radiating Structures
Lee, Hongmin ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 12~20
DOI : 10.5573/ieek.2013.50.9.012
In this paper, a co-planar waveguide(CPW) fed zeroth-order resonant(ZOR) antenna with frequency reconfigurable radiating structures is fabricated and measured. The unit cell of proposed antenna consists of a series metal-insulator-metal(MIM) capacitor and two shunt line inductors which are shorted through the via. The proposed antenna is designed based on a composite right/left-handed(CRLH) transmission line with two unit cells and it has open ended structure in order to radiate electromagnetic energy mainly on the shunt arm. In order to reduce the antenna size and to exhibit a frequency reconfigurable ability using diode switches four straight strips bent by 90 degrees are used as shunt inductors. The total size of fabricated antenna is
at zeroth-order resonant(ZOR) frequency. The measured maximum gain and bandwidth (VSWR
) are 3.1 dBi and 56MHz at ZOR frequency of 2.97 GHz, respectively. This type of antenna can be applied to a frequency reconfigurable antenna system with triple bands.
Ciphertext Policy-Attribute Based Encryption with Non Monotonic Access Structures
Sadikin, Rifki ; Moon, SangJae ; Park, YoungHo ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 21~31
DOI : 10.5573/ieek.2013.50.9.021
A ciphertext policy-attribute based encryption(CP-ABE) scheme can be used to realize access control mechanism without a trusted server. We propose an attribute-based access control mechanism by incorporating a CP-ABE scheme to ensure only authorized users can access the sensitive data. The idea of CP-ABE is to include access control policy in the ciphertexts, in which they can only be decrypted if a user possesses attributes that pass through the ciphertext`s access structure. In this paper, we prove a secure CP-ABE scheme where the policy can be expressed in non-monotonic access structures. We further compare the performance of our scheme with the existing CP-ABE schemes.
Design and Performance Analysis of u-TSMVPN for Intelligent Transportation Systems
Jeon, Hae-Nam ; Jeong, Jongpil ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 32~45
DOI : 10.5573/ieek.2013.50.9.032
Globally, intelligent vehicles and telematics research and development through the integration of IT technology in the vehicle are significant increasing. Real-time data communication for intelligent transportation system (ITS) is very important. It collects real-time data from the vehicle and provides the information collected from ITS center. We propose an effective and secure communication scheme for these communication procedures. In particular, our proposed SIP-based MVPN reduces signaling cost and has many advantages in security aspects. In addition, our proposed scheme performs the mobility management applying NEMO (Network Mobility) for the communication between the vehicles. In other words, we propose an ITS communication mechanism of SIP-based mobile VPN and V2V NEMO. Finally, our performance analysis show that the ITS of SIP-based MVPN is significantly reducing the handoff signaling cost.
Optimum Placement and Shape of UHF Monopole Antenna Mounted on UAV
Choi, Jaewon ; Kim, Jihoon ; Chung, Eulho ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 46~51
DOI : 10.5573/ieek.2013.50.9.046
In this paper, the optimum placement and shape of UHF antenna on the unmanned aerial vehicle (UAV) are analyzed by using the electromagnetic (EM) simulation on the various locations. The FEKO was used for the EM-simulation. In order to reduce the complexity of simulation and minimize the runtime and memory usage, the composite aircraft structure is simplified as the PEC model excluding the radome structure. The simulation was performed on the wing and ventral fin of UAV, and the antenna shape used the monopole, dipole, and bent monopole antennas. When the monopole antenna is mounted under the wing, two antennas need to be mounted under the right and left wings, and those antennas have to be switched as the direction of UAV wing to the line of sight (LOS) data-link (DL) ground antenna. In the case of mounting under the ventral fin, one antenna can be used regardless of the direction of UAV wing to the LOS DL ground antenna. Also, the antenna gain is improved by the blockage reduction. The antenna gain is further improved by using the bent monopole antenna. The optimum solution of UHF antenna placement and shape on UAV is to mount the bent monopole antenna under the ventral fin.
Accurate RF Extraction Method for Gate Voltage-Dependent Carrier Velocity of Sub-0.1㎛ MOSFETs in the Saturation Region
Lee, Seonghearn ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 55~59
DOI : 10.5573/ieek.2013.50.9.055
A new method using RF Ids determined from measured S-parameters is proposed to extract the gate-voltage dependent effective carrier velocity of bulk MOSFETs in the saturation region without additional dc Ids measurement data suffering parasitic resistance effect that becomes larger with continuous down-scaling to sub-
. This method also allows us to extract the carrier velocity in the saturation region without the difficult extraction of bias-dependent parasitic gate-source capacitance and effective channel length. Using the RF technique, the electron velocity overshoot exceeding the bulk saturation velocity is observed in bulk N-MOSFETs with a polysilicon gate length of
Reduced Pin Count Test Techniques using IEEE Std. 1149.7
Lim, Myunghoon ; Kim, Dooyoung ; Mun, Changmin ; Park, Sungju ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 60~67
DOI : 10.5573/ieek.2013.50.9.060
Test cost reduction is necessary to test a complex System-on-a-Chip(SoC) which adopts various Intellectual Properties (IP). In this paper, test architecture with low pin count which is able to IP-based SoC test, using IEEE Std. 1149.7 and IEEE Std. 1500, is proposed. IEEE Std. 1500 provides independent access mechanism for each IP in IP-based SoC test. In this paper, just two test pins are required by composing that these independent access mechanism can be controlled by IEEE Std. 1149.7. The number of Chips which are tested at the same time is increased by reducing required test pin count at wafer and package level test, and consequently the overall manufacturing test cost will be reduced significantly.
Design of a Readout Circuit of Pulse Rate and Pulse Waveform for a U-Health System Using a Dual-Mode ADC
Shin, Young-San ; Wee, Jae-Kyung ; Song, Inchae ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 68~73
DOI : 10.5573/ieek.2013.50.9.068
In this paper, we proposed a readout circuit of pulse waveform and rate for a U-health system to monitor health condition. For long-time operation without replacing or charging a battery, either pulse waveform or pulse rate is selected as the output data of the proposed readout circuit according to health condition of a user. The proposed readout circuit consists of a simple digital logic discriminator and a dual-mode ADC which operates in the ADC mode or in the count mode. Firstly, the readout circuit counts pulse rate for 4 seconds in the count mode using the dual-mode ADC. Health condition is examined after the counted pulse rate is accumulated for 1 minute in the discriminator. If the pulse rate is out of the preset normal range, the dual-mode ADC operates in the ADC mode where pulse waveform is converted into 10-bit digital data with the sampling frequency of 1 kHz. These data are stored in a buffer and transmitted by 620 kbps to an external monitor through a RF transmitter. The data transmission period of the RF transmitter depends on the operation mode. It is generally 1 minute in the normal situation or 1 ms in the emergency situation. The proposed readout circuit was designed with
process technology. The chip area is
. According to measurement, the power consumption is
in the count mode and
in the ADC mode with the operating voltage of 1 V.
The Study of an Extended Cultural Dimensions Index based on the Content
Oh, Jung-Min ; Moon, Nammee ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 77~84
DOI : 10.5573/ieek.2013.50.9.077
There are lots of tries to make a combination between the technology development which is fast arisen and cultural phenomenon which imply in it. We called this research area as the cultural computing or cultural modeling. In this paper, we examine the cultural user interface design, especially cultural design structure based on the contents considering the research trend of the cultural modeling. To design of the contents based on the culture, there is a need to draw a structure of the cultural feature for the contents. To do this, we combine Hofstede`s cultural dimensions model with the data of contents and then we suggest cultural index of content(CiCo). Furthermore, we draw national index of cultural content(NiCC), through conjoining CiCo with preference pattern of content consumption for the nations. Suggested CiCo and NiCC are based on Hofstede`s model, however they are improved approximately 10% of the explanatory of model than the Hofstede`s.
Data Reusable Search Scan Methods for Low Power motion Estimation
Kim, Tae Sun ; SunWoo, Myung Hoon ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 85~91
DOI : 10.5573/ieek.2013.50.9.085
This paper proposes the data reusable search scan methods for full search and fast search to implement low power Motion Estimation (ME). The proposed Optimized Sub-region Partitioning (OSP) method which divide search region into several sub-region can reduce the number of the required Reconfigurable Register Array (RRA) by half compared to the existing smart snake scan method for the same data reusability. In addition, the proposed Center Biased Search Scan method (CBSS) for various fast search algorithms can improve the data reusability. The performance comparisons show that the proposed search scan methods can reduce the average redundant data loading about 26.9% and 16.1% compared with the existing rater scan and snake scan methods, respectively. Due to the reduction of memory accesses, the proposed search scan methods are quite suitable for low power and high performance ME implementation.
Next Generation Convergence Security Framework for Advanced Persistent Threat
Lee, Moongoo ; Bae, Chunsock ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 92~99
DOI : 10.5573/ieek.2013.50.9.092
As a recent cyber attack has a characteristic that is intellectual, advanced, and complicated attack against precise purpose and specified object, it becomes extremely hard to recognize or respond when accidents happen. Since a scale of damage is very large, a corresponding system about this situation is urgent in national aspect. Existing data center or integration security framework of computer lab is evaluated to be a behind system when it corresponds to cyber attack. Therefore, this study suggests a better sophisticated next generation convergence security framework in order to prevent from attacks based on advanced persistent threat. Suggested next generation convergence security framework is designed to have preemptive responses possibly against APT attack consisting of five hierarchical steps in domain security layer, domain connection layer, action visibility layer, action control layer and convergence correspondence layer. In domain connection layer suggests security instruction and direction in domain of administration, physical and technical security. Domain security layer have consistency of status information among security domain. A visibility layer of Intellectual attack action consists of data gathering, comparison, decision, lifespan cycle. Action visibility layer is a layer to control visibility action. Lastly, convergence correspond layer suggests a corresponding system of before and after APT attack. An introduction of suggested next generation convergence security framework will execute a better improved security control about continuous, intellectual security threat.
Study on AMI System based on IEEE 802.11s Mesh Technology
Kim, Younghyun ; Myoung, No-Gil ; Kim, Myong-Soo ; Lee, Sang-Youm ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 100~106
DOI : 10.5573/ieek.2013.50.9.100
AMI enables bi-directional exchange of information between utilities and consumers in order to maximize energy efficiency. To enable the AMI, it is essentially required to construct stable communication networks. This paper shows the AMI system based on IEEE 802.11s as one of the communication methods. Experimental results show that the wireless mesh network technology achieves a stable communication performance over a wide coverage.
Low Performance Electronics Evolved into Smart Appliances
Back, Jonghui ; Kim, Kyosun ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 107~115
DOI : 10.5573/ieek.2013.50.9.107
Smart appliances with multi-media and telecommunication equipments provide users complicated convenience functions. On the contrary, 8-bit controller-based low performance electronics still cannot afford such multimedia and telecommunication. If we find a way to have low-end electronics connected and provide complicated functions, they can be also made "smart". Fortunately, 8-bit controllers used in low-end appliances have UART, which can be connected to any of BlueTooth, Wi-Fi and ZigBee communication modules which can, in turn, communicate with smart devices. Any communication module can be attached to the low-end electronics due to the variety of smart devices` connectivity at the other side. Although the convenience functions seem complicated, they are actually macros in a script form composed of micro commands which implement the base functions of appliances. Since the kinds of the base functions are not that many, the low-end electronic appliances will become "smart" if their control program can be extended to execute sequentially the micro commands in any combination. Such simple innovation has not seen the world, until now due to the overhead of the additionally required hardware such as display devices and buttons. The high-quality display and touch screen functionalities of smart devices can replace the required hardware, and remove the overhead completely. In fact, the low-end appliances become smart as if an "evolution kit" is newly equipped.
Chromatic Aberration Correction Method by Considering Local Properties of the Image
Kang, Hee ; Kang, Moon Gi ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 119~126
DOI : 10.5573/ieek.2013.50.9.119
In this paper, we propose a chromatic aberration removal algorithm in image capture devices, which considers local properties of the image. Chromatic aberration is generated by the fact that the refractive index of the lens is different for different wavelengths, which produces color artifacts on strong edge due to misalignment of RGB channels. Under the characteristics of the artifacts, the proposed algorithm first estimates the regions with the apparent color artifacts as the neighborhoods of the strong edge. In the regions, the proposed algorithm removes the color artifacts by matching the edges of RGB channels. The widely used conventional methods based on global image warping could not remove the color artifacts of longitudinal chromatic aberration and purple fringing identified by the image sensor, whereas the matching process of the proposed method could reduce them. Experimental results show that the proposed algorithm outperforms the conventional methods on objective and subjective criteria.
Multi-spectral Flash Imaging using Region-based Weight Map
Choi, Bong-Seok ; Kim, Dae-Chul ; Lee, Cheol-Hee ; Ha, Yeong-Ho ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 127~135
DOI : 10.5573/ieek.2013.50.9.127
In order to acquire images in low-light environments, it is usually necessary to adopt long exposure times or resort to flash lights. However, flashes often induce color distortion, cause the red-eye effect and can be disturbing to subjects. On the other hand, long-exposure shots are susceptible to subject-motion, as well as motion-blur due to camera shake when performed hand-held. A recently introduced technique to overcome the limitations of traditional low-light photography is that of multi-spectral flash. Multi-spectral flash images are a combination of UV/IR and visible spectrum information. The general idea is that of retrieving details from the UV/IR spectrum and color from the visible spectrum. However, multi-spectral flash images themselves are subject to color distortion and noise. This works presents a method to compute multi-spectral flash images so that noise can be reduced and color accuracy improved. The proposed approach is a previously seen optimization method, improved by the introduction of a weight map used to discriminate uniform regions from detail regions. The weight map is generated by applying canny edge operator and it is applied to the optimization process for discriminating the weights in uniform region and edge. Accordingly, the weight of color information is increased in the uniform region and the detail region of weight is decreased in detail region. Therefore, the proposed method can be enhancing color reproduction and removing artifacts. The performance of the proposed method has been objectively evaluated using long-exposure shots as reference.
Markerless Motion Capture Algorithm for Lizard Biomimetics
Kim, Chang Hoi ; Kim, Tae Won ; Shin, Ho Cheol ; Lee, Heung Ho ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 136~143
DOI : 10.5573/ieek.2013.50.9.136
In this paper, a algorithm to find joints of a small animal like a lizard from the multiple-view silhouette images is presented. The proposed algorithm is able to calculate the 3D coordinates so that the locomotion of the lizard is markerlessly reconstructed. The silhouette images of the lizard was obtained by a adaptive threshold algorithm. The skeleton image of the silhouette image was obtained by Zhang-Suen method. The back-bone line, head and tail point were detected with the A* search algorithm and the elimination of the ortho-diagonal connection algorithm. Shoulder joints and hip joints of a lizard were found by
masking of the thicked back-bone line. Foot points were obtained by morphology calculation. Finally elbow and knee joint were calculated by the ortho distance from the lines of foot points and shoulder/hip joint. The performance of the suggested algorithm was evaluated through the experiment of detecting joints of a small lizard.
Low-Cost Remote Power-Quality-Failure Monitoring System using Android APP and MCU
Lim, Ho-Kyoun ; Kim, Seo-Hwi ; Lee, Seung-Hyeon ; Choe, Sangho ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 144~155
DOI : 10.5573/ieek.2013.50.9.144
This paper presents a low-cost remote power-quality-failure monitoring system (RPMS) using Android App and TI MCU (micro-controller unit), which is appliable to a micro-grid. The designed RPMS testbed consists of smart nodes, a server, and Android APPs. Especially, the C2000-series MCU-based RPMS smart node that is low-cost compared to existing monitoring systems has both a signal processing function for power signal processing and a data transmission function for power-quality monitoring data transmission. The signal processing function implements both a wavelet-based power failure detection algorithm including sag, swell, and interruption, and a FFT-based power failure detection algorithm including harmonics such that reliable and real-time power quality monitoring is guaranteed. The data transmission function implements a low-complexity RPMS transmission protocol and defines a simple data format (msg_Diag) for power monitoring message transmission. We may watch the monitoring data in real time both at a server and Android phone Apps connected to the WiFi network (or WAN). We use RS-232 (or Bluetooth) as the wired (or wireless) communication media between a server and nodes. We program the RPMS power-quality-failure monitoring algorithm using C language in the CCS (Code Composer Studio) 3.3 environment.
Schur Algorithm for Sub-bottom Profiling
Bae, Jinho ; Lee, Chong Hyun ; Kim, Hoeyong ; Cho, Jung-Hong ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 156~163
DOI : 10.5573/ieek.2013.50.9.156
In this paper, we propose an algorithm for estimating media characteristics of sea water and subbottom multi-layers. The proposed algorithm for estimating reflection coefficients, uses a transmitted signal and reflected signal obtained from multiple layers of various shape and structure, and the algorithm is called Schur algorithm. The algorithm is efficient in estimating the reflection coefficients since it finds solution by converting the given inverse scattering problem into matrix factorization. To verify the proposed algorithm, we generate a transmit signal and reflected signal obtained from lattice filter model for sea water and subbottom of multi-level non-homogeneous layers, and then find that the proposed algorithm can estimate reflection coefficients efficiently.
Background Removal from XRF Spectrum using the Interval Partitioning and Classifying
Yang, Sanghoon ; Lee, Jaehwan ; Yoon, Sook ; Park, Dong Sun ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 164~171
DOI : 10.5573/ieek.2013.50.9.164
XRF spectrum data of a material include a lot of background signals which are not related to its components. Since an XRF analyzer analyzes components and concentrations of an analyte using the locations and magnitudes of gaussian-shaped peaks extracted from a spectrum, its background signals need to be removed completely from the spectrum for the accurate analysis. Morphology-based method, SNIP-based method and thresholding-based method have been used to remove background signals. In the paper, a background removal method, an improved version of an interval-thresholding-based method, is proposed. The proposed method consists of interval partitioning, interval classifying, and background estimation. Experimental results show that the proposed method has better performance on background removal from the spectrum than the existing methods, morphology-based method and SNIP-based method.
Modified FxLMS Algorithm for Active Noise Control and Its Real-Time Implementation
Mu, Xiangbin ; Ko, JinSeok ; Rheem, JaeYeol ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 172~176
DOI : 10.5573/ieek.2013.50.9.172
This paper presents a modified filtered-x least mean square (FxLMS) algorithm to improve the stability of active noise control (ANC) system in realistic environment. A real-time ANC system employing modified FxLMS is designed and implemented on digital signal processor (DSP) board. The ANC system is evaluated for cancelling various tonal frequency noises in the range from 100 to 500 Hz and the performance is measured in terms of sound pressure level (SPL) attenuation. Experiment results show that a quiet zone with maximum 20 dB SPL attenuation can be generated around the location of error microphone.
Analysis of the Simon effect using Amplitude of RTA-ERP and Response time
Kim, HyeJin ; Yoo, SunKook ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 179~185
DOI : 10.5573/ieek.2013.50.9.179
In this paper, the RTA-ERP(Response Time Aligned-Evoked Relative Potential) was modelled to analyze the effect of motor activation pattern in response to visual sensory stimuli. Simon effect was analysed using the amplitude response of RTA-ERP and measured response time. The `odd number` experiments, which identify an odd number mixed with same numbers, was performed with 15 healthy adult participants(9 males and 6 females, whose mean age of 31) for 7 minutes for each participant. Throughout experimentation, we observed that the proposed RTA-ERP can compensate the timing variation due to different neural processing procedures in the brain, and shows enhanced LRP(Lateralized Readiness Potential) and Pe(Error Related Positivity). Regarding to `congruence` and `incongruence` testing patterns, the amplitude of RTA-ERP and the response time for the `congruence` are
larger, and 43 ms faster than those for the `incongruence`, respectively. The amplitude characteristics of RTA-ERP, obtained by synchronizing the onset times with respect to response time, corresponds more likely to that of P300 in the ERP pattern (the characteristics of the Simon effect).
Electrical Fire Warning Fuzzy System for Measured Power Informations
Cho, Do-Hyeoun ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 189~193
DOI : 10.5573/ieek.2013.50.9.189
In this paper, in order to predict and prevent electrical fires that occur in the power system, we measured the informations of electric power, and then proposed a system to predict the electrical fire using these informations. To this end, we analyzed the correlations for over-current, overload and overheating. These states are caused by the grounding current and the leakage current, and are the main causes of an electrical fire. Use these correlations to derive the derivative of the fuzzy rules for membership function. The designed algorithm was simulated by utilizing the informations of the actual power of the switchgear-panel.
Multi-scale Crack Detection Using Scaling
Kim, Young-Ro ; Oh, Tae-Myung ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 194~200
DOI : 10.5573/ieek.2013.50.9.194
In this paper, we propose a multi-scale crack detection method using scaling. It is based on morphology algorithm, crack features, and scaling. We use a morphology operator which extracts patterns of crack. It segments cracks and background using opening and closing operations. Morphology based segmentation is better than existing integration methods using subtraction in detecting a crack it has small width. However, morphology methods using only one structure element could detect only fixed width crack. Thus, we use a scaling method. We use bilinear interpolation for scaling. Our method calculates values of properties such as the number of pixels and the maximum length of the segmented region. We decide whether the segmented region belongs to cracks according to those data. Experimental results show that our proposed multi-scale crack detection method has better results than those of existing detection methods.
The Reduction Method for Radiated EMI in USB Power Line of Cable
Park, Kyoung-Jin ; Lee, Dae-Woo ; Ko, Yong-Mok ; Gang, Eun-Gyun ; Park, Jong-Hyun ; Kim, Keun-Yong ; Ra, Keuk-Whan ;
Journal of the Institute of Electronics and Information Engineers, volume 50, issue 9, 2013, Pages 201~208
DOI : 10.5573/ieek.2013.50.9.201
In this paper, we studied on improvement for radiated EMI of USB power line of cable. it is made by using wireless video access point system for confirming the phenomenon of radiated EMI from cable. then, we make sure that the limit exceed through the initial measurement of radiated EMI limit criteria in comparison to about 3 [dBuV/m]~15 [dBuV/m]. after that we confirmed the resonance in power line of cable through measurement of s-parameters. so, we confirmed the relation radiated EMI and power line of cable resonance and we reduced radiated EMI in power line of cable through a capacitor and low pass-band filter using the technique of power networks management. in conclusion, we suggested how to reduce power line of cable resonance applied for the improved method. and we confirmed that suggested reduction method is suitable through testing radiated EMI. the result of radiated EMI reduction limit criteria 40[dBuV/m]~47[dBuV/m] in comparison to about 3 [dBuV/m]~20 [dBuV/m].