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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of the Korea institute of electronic communication sciences
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Journal DOI :
The Korea Institute of Electronic Communication Science
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Volume & Issues
Volume 9, Issue 12 - Dec 2014
Volume 9, Issue 11 - Nov 2014
Volume 9, Issue 10 - Oct 2014
Volume 9, Issue 9 - Sep 2014
Volume 9, Issue 8 - Aug 2014
Volume 9, Issue 7 - Jul 2014
Volume 9, Issue 6 - Jun 2014
Volume 9, Issue 5 - May 2014
Volume 9, Issue 4 - Apr 2014
Volume 9, Issue 3 - Mar 2014
Volume 9, Issue 2 - Feb 2014
Volume 9, Issue 1 - Jan 2014
Selecting the target year
Design and Implementation of Local Oscillator for X-Band Radar
Kim, Gi-Rae ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1215~1220
DOI : 10.13067/JKIECS.2014.9.11.1215
In this paper, a local oscillator for X-band radar system is designed and fabricated with GaAs MESFET. GaAs MESFET is good for microwave oscillators because of very low noise figure and high electron mobility. Oscillator design methods in this paper are used the characteristic of negative resistance of active component and impedance matching technique without RF resonator. So, oscillator is designed in compact size because space of RF resonator is reduced and can be applied MMIC technique. Designed oscillator has characteristic of the output power of 2.30 dBm and center frequency of 10.545GHz.
The Effect of the Number of Phoneme Clusters on Speech Recognition
Lee, Chang-Young ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1221~1226
DOI : 10.13067/JKIECS.2014.9.11.1221
In an effort to improve the efficiency of the speech recognition, we investigate the effect of the number of phoneme clusters. For this purpose, codebooks of varied number of phoneme clusters are prepared by modified k-means clustering algorithm. The subsequent processing is fuzzy vector quantization (FVQ) and hidden Markov model (HMM) for speech recognition test. The result shows that there are two distinct regimes. For large number of phoneme clusters, the recognition performance is roughly independent of it. For small number of phoneme clusters, however, the recognition error rate increases nonlinearly as it is decreased. From numerical calculation, it is found that this nonlinear regime might be modeled by a power law function. The result also shows that about 166 phoneme clusters would be the optimal number for recognition of 300 isolated words. This amounts to roughly 3 variations per phoneme.
A Study on the DC parameter matching according to the shrink of 0.13㎛ technology
Mun, Seong-Yeol ; Kang, Seong-Jun ; Joung, Yang-Hee ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1227~1232
DOI : 10.13067/JKIECS.2014.9.11.1227
This paper relates 10% shrink from
design for core devices as well as input and output (I/O) devices different from previous poly length shrink size only. We analyzed body effect with different channel length and doping profile simulation. After fixing the gate oxide module process, LDD implant conditions were optimized such as decoupled plasma nitridation of gate oxide, TEOS oxide
before LDD implant and 22o tilt-angle(45o twist-angle) LDD implant respectively to match the spice DC parameters of pre-shrink and finally matched them within 5%.
Gate Cost Reduction Policy for Direct Irreversible-to-Reversible Mapping Method without Reversible Embedding
Park, Dong-Young ; Jeong, Yeon-Man ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1233~1240
DOI : 10.13067/JKIECS.2014.9.11.1233
For the last three decades after the advent of the Toffoli gate in 1980, while many reversible circuit syntheses have been presented reversible embedding methods onto suitable reversible functions, only a few proposed direct irreversible-to-reversible mapping methods without reversible embedding. In this paper we present two effective policies to reduce the gate cost and complexity for the existing direct reversible mapping methods without reversible embedding. In order to develop new cost reduction policies we consider the cost influence of Toffoli module according to NOT gate arrangement in classical circuits. From this we deduced an inverse proportional property between inverting input numbers of classical AND/OR gates and reversible Toffoli module cost based on a fact - the inverting inputs of classical AND(OR) gates increase(decrease) the Toffoli module cost. We confirm the applications of the inverting input rearrangement and maximum fan-out policies preceding direct reversible mapping will be effective method to improve the reversible Toffoli module cost and complexity with the parallel using of the fan-out and supercell ones.
A cluster head replacement based on threshold in the Internet of Things
Kim, Jeong-Won ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1241~1248
DOI : 10.13067/JKIECS.2014.9.11.1241
An efficient battery usage of sensor nodes is main goal in a sensor network, which is the substructure of Internet of Things. Maximizing the battery usage of sensor nodes makes the lifetime of sensor network increase as well as the reliability of the network improved. The previous solutions to solve these problems are mainly focused on the cluster head selection based on the remaining energy. In this paper, we consider both the head selection and the replacement interval which is determined by a threshold that is based on the remaining energy, density of alive nodes, and location. Our simulation results show that the proposed scheme has outstanding contribution in terms of maximizing the life time of the network and balancing energy consumption of all nodes.
Visualization Algorithm for Similarity Connection based on Data Transmutability
Kim, Boon-Hee ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1249~1254
DOI : 10.13067/JKIECS.2014.9.11.1249
Big data based on numerous data made by the people are used in order to obtain useful information. We can obtain more useful information if it can apply machine learning techniques added deformation of human memory on the characteristics of the computer program. And big data is predicted by using these conclusions. Humans are used to remember similar data as an original data, so big data processing technology should reflect these human characteristics. In this study, this algorithm to provide the selectivity of information is proposed. This algorithm is the technology to reflect the above factors. This algorithm is selected the data with high selectivity to determine similar data based on the deformation characteristics of the data.
Real Time Framework Design based on Android Platform
Kang, Ki-Woong ; Han, Kyu-Cheol ; Jang, Seung-Jin ; Lim, Se-Jung ; Kim, Kwang-Jun ; Jang, Chang-Soo ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1255~1266
DOI : 10.13067/JKIECS.2014.9.11.1255
This thesis presents MPU module, Base board and sensor module which are efficient industrial control through design and manufacture as developing S5PV210 CPU of SAMSUNG used by ARM Cortex-A8 based on Android which is Open mobile platform is installed to embedded system. Data for temperature and humidity which are received by sensor module proved the suitability and validity for the real time framework design as implementing application program employed the smart phone App with hybrid application based on DB of web server.
The case study for Implementation and verification of Network based on VLSM
Jang, Jae-Yeol ; Kim, No-Whan ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1267~1276
DOI : 10.13067/JKIECS.2014.9.11.1267
As the volume of internet rapidly increases, the number of IPv4 addresses available is quickly declining, while transition to IPv6 is being delayed. As a interim solution, Variable-Length Subnet Masking(VLSM) addressing scheme, which varies the length of each IP address allowing more efficient, is being used. This paper suggests effective example of network based on virtual network with topology designed using VLSM charting rather than usual theoretical approach in VLSM, which allows more efficient use of address space.
Relativity between Concentration by Letter Visual Stimulus and EEG Signal
Jang, Yun-Seok ; Han, Jae-Woong ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1277~1282
DOI : 10.13067/JKIECS.2014.9.11.1277
In this paper, we aimed to analysis EEG signals related to concentration of adolescents using letter visual stimulus to induce the concentration. The visual stimulus tasks were searching errors of propositional particle in several sentences. In the EEG signals, we specially focussed on SMR waves and mid-beta waves according to the results of a preceding research. Therefore we presented position of channel and frequency band of mid-beta significantly related to the concentration waves as the experimental results.
The effects of microcurrent stimulation for gait improvement
Yu, Jae-Young ; Jeong, Jin-Gyu ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1283~1290
DOI : 10.13067/JKIECS.2014.9.11.1283
This study was conducted to apply microcurrents of
effective for ATP generation to leg muscles to which delayed onset muscle soreness (DOMS) had been induced in order to examine whether the microcurrent stimulation was effective for gait improvement. Forty subjects were randomly assigned to an experimental group of 20 subjects and a placebo group of 20 subjects. Microcurrents were applied immediately after inducing DOMS and 24 hours and 48 hours thereafter and changes in the center of pressure (COP), cadence, and affected stance phases were measured. According to the results of the measurement, changes in the COP, cadence, and affected stance phases at 48 hours after the induction of DOMS were statistically significant compared to the values before the induction. The COP of the experimental group became statistically significantly lower and the ratio of affected stance phases of the experimental group became statistically significantly higher compared to the placebo group at 48 hours after the induction of DOMS. Therefore,
microcurrents showed effects for gait improvement by promoting the recovery and healing of damaged muscles.
A Study about the Modelling of Thermoelectric Cooler and the Thermal Transfer Analysis
Ko, Yun-Seok ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1291~1296
DOI : 10.13067/JKIECS.2014.9.11.1291
The thermoelectric cooler is receiving great interest because of advantages such as the precise temperature control capability, the compact and lightweight cooler, and the mechanical vibrationless structure which enhances the reliability compared with the existing vapor compression cooler. However, it is not easy to design the optimal thermoelectric cooler which appropriate to the application because the thermal analysis should be necessary required. Accordingly, this paper studies the methodology of the modelling, sizing and thermal analysis of the thermoelectric cooler using SINDA/FLUINT analysis tool.
Mathematical Modelling of Love and its Nonlinear Analysis
Kim, Soon-Whan ; Shon, Young-Woo ; Bae, Young-Chul ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1297~1304
DOI : 10.13067/JKIECS.2014.9.11.1297
Love which is one of the emotional of mankind, has been studied in sociology and psychology as a matter of grate concern. In this paper We represent romantic behaviors in the love equation of Romeo and Juliet as time series and phase portraits. Also we analyze the behavior`s relation by using time series and phase portraits when external force applied as the third person between Romeo and Juliet.
Development of Monitoring System for Safety Operation of Crane
Bae, Young-Chul ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1305~1310
DOI : 10.13067/JKIECS.2014.9.11.1305
In this paper, the new integrated crane monitoring system that complemented the point at issue for existing crane monitoring system is implemented. The Implementing monitoring system based on wireless communication system, consist of a measuring system of total load currents of main circuit breaker, a temperature and vibration measuring system with temperature sensors and vibration sensors for monitoring an oil and bearing of a main decelerator, a temperature measuring system with temperature sensors of a main motor bearing, and sensors for fire monitoring of an entire electrical space. The measured data from these sensors transmit main controller which is located in external location. Then the Integrating monitoring system is implemented and is performed the performance test to performing diagnosis of motors of a crane.
The Study on the design and implementation of a X-band 25W Power Amplifier Module using GaAs MMIC
Kim, Ki-Jung ; Kim, Bong-Soo ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1311~1316
DOI : 10.13067/JKIECS.2014.9.11.1311
To be used in a transmitter of a satellite transponder of this paper, X band 25W power amplifier module, a part constituting of high-power amplifier is transmitted to the equipment for transmitting to geostationary communications satellites(36,000Km distance). PAM consisted a total of four power amplifier module has a high output characteristic of the high-output amplifier is used in the ground station. Used in conjunction with the structured type power amplifier module is composed of Serial Combining Structure. This PAM(Power Amplifier Module) configured by combining the circuit with the power amplifier, 10 MMIC chips and the Al2O3 thin film substrate using a Hybrid Technique of power amplifier module, was implemented at X band PAM(Power Amplifier Module) of 25W grade.
The Design and Implementation of Real-time Virtual Image Synthesis System of Map-based Depth
Lee, Hye-Mi ; Ryu, Nam-Hoon ; Roh, Gwhan-Sung ; Kim, Eung-Kon ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1317~1322
DOI : 10.13067/JKIECS.2014.9.11.1317
To complete an image, it is needed to go through the process to capture the actual actor`s motion and compose it with virtual environment. Due to the excessive cost for production or lack of post-processing technology, however, it is mostly conducted by manual labor. The actor plays his role depending on his own imagination at the virtual chromakey studio, and at that time, he has to move considering the possible collision with or reaction to an object that does not exist. And in the process of composition applying CG, when the actor`s motion does not go with the virtual environment, the original image may have to be discarded and it is necessary to remake the film. The current study suggested and realized depth-based real-time 3D virtual image composition system to reduce the ratio of remaking the film, shorten the production time, and lower the production cost. As it is possible to figure out the mutual collision or reaction by composing the virtual background, 3D model, and the actual actor in real time at the site of filming, the actor`s wrong position or acting can be corrected right there instantly.
Implementation of Social Network Application for Civil Service based on Android
Park, Hung-Bog ; Seo, Jung-Hee ;
The Journal of the Korea institute of electronic communication sciences, volume 9, issue 11, 2014, Pages 1323~1330
DOI : 10.13067/JKIECS.2014.9.11.1323
As for civil service support, the interaction between citizens as well as the government and citizens has an important value, and the participation between citizens be very important. The interaction between these citizens can lead to spreading the use of the app by getting them to share their status information with an specified number of people in the public service such as a social network service. Mobile-based social network service has various built-in sensors to increase the interaction between the government and citizens and post the status information of users on SNS. In this regard, this paper proposed a social network application for civil services based on the Android by using location-based context information. Experimental results showed that since the application proposed in this paper can be applied to low-performance system and exhibits high performance, it can allow users located at a short distance to detect new information and share contents by adding the content to SNS which is the closest to the location of users.