http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Capacity Analysis and Feedback Threshold Optimization in Fair Multiuser Diversity System
Taejoon Kim,Jong-Tae Lim IEEE 2012 IEEE Transactions on Vehicular Technology VT Vol.61 No.9
<P>The scheduling scheme of exploiting multiuser diversity gain increases network capacity drastically; however, feedback information overhead linearly increases as the number of users increases. Thus, the allocation of an optimum amount of system resources in feedback signaling is quite an important problem. We analyze the exact capacity of the contention-based multiuser diversity scheduler, which considers the quantitative feedback overhead. The optimum feedback threshold is derived based on the analyzed capacity model. Moreover, the method of searching the optimum resource to be allocated in feedback signaling is proposed.</P>
Effect of Lewis number on Acoustic Instability of Upward Propagating Ethylene Flames
Taejoon Noh(노태준),Sunghwan Yoon(윤성환),Fujita Osamu 한국연소학회 2015 KOSCOSYMPOSIUM논문집 Vol.2015 No.5
The effects of Lewis number on acoustic instability of upward propagating flames in a tube were studied experimentally. In our results, it is verified that increasing Lewis number contributes stabilizing of the acoustic instability. And also, it seemed that re-stabilizing of secondary instability became observed at relatively lower Lewis number. Finally, we can observe the flat flame which is corresponding to the primary acoustic instability at relatively high Lewis number.
A study on BEMS-linked Indoor Air Quality Monitoring Server using Industrial IoT
Taejoon Park,Jaesang Cha 한국인터넷방송통신학회 2018 International Journal of Internet, Broadcasting an Vol.10 No.4
In this paper, we propose an interworking architecture for building indoor air quality monitoring server (BEMS) using IIoT (Industrial Internet of Things). The proposed monitoring server adopts IIoT-based standard protocol so that interaction with BEMS installed in existing buildings can be performed easily. It can effectively communicate with indoor air quality measurement sensor installed in the building based on IIoT, Indoor air quality monitoring is possible. We implemented a proposed monitoring server, and confirmed the availability and monitoring of data from sensors in the building.
Optimal Resource Planning with Interference Coordination for Relay-Based Cellular Networks
( Taejoon Kim ),( Kwanghoon An ),( Heejung Yu ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.11
Multihop relay-based cellular networks are attracting much interest because of their throughput enhancement, coverage extension, and low infrastructure cost. In these networks, relay stations (RSs) between a base station (BS) and mobile stations (MSs) drastically increase the overall spectral efficiency, with improved channel quality for MSs located at the cell edge or in shadow areas, and enhanced throughput of MSs in hot spots. These relay-based networks require an advanced radio resource management scheme because the optimal amount of radio resource for a BS-to-RS link should be allocated according to the MS channel quality and distribution, considering the interference among RSs and neighbor BSs. In this paper, we propose optimal resource planning algorithms that maximize the overall utility of relay-based networks under a proportional fair scheduling policy. In the first phase, we determine an optimal scheduling policy for distributing BS-to-RS link resources to RSs. In the second phase, we determine the optimal amount of the BS-to-RS link resources using the results of the first phase. The proposed algorithms efficiently calculate the optimal amount of resource without exhaustive searches, and their accuracy is verified by comparison with simulation results, in which the algorithms show a perfect match with simulations.
Queuing Analysis in a Multiuser Diversity System With Adaptive Modulation and Coding Scheme
Taejoon Kim,Jong-Tae Lim IEEE 2011 IEEE Transactions on Vehicular Technology VT Vol.60 No.1
<P>In wireless packet networks, the performance of multiuser diversity schedulers has been analyzed with the saturation assumption; however, the finite queue length effect should be taken into account. We propose a new scheduling scheme exploiting multiuser diversity that considers not only channel information but queue information as well. Considering the finite queue length effect and adaptive modulation and coding scheme (AMCS), we analyze the performance of the proposed scheduler.</P>
Taejoon Son,정경영,박진섭 한국물리학회 2013 Current Applied Physics Vol.13 No.6
Improvement in the light extraction efficiency (LEE) of GaN-based green light emitting diodes (LEDs)with ZnO nanostructures synthesized by a hydrothermal method is reported. Formation of ZnO nanorods,hemispheres, and cones was controlled by varying the pH of the aqueous synthesis solution. The shape of the ZnO nanostructures integrated onto the LEDs shows a strong relationship with the LEE characteristics of GaN-based green LEDs. The electroluminescence (EL) intensity of LEDs covered by ZnO nanostructures increased compared to conventional LEDs. In terms of LEE, LEDs with surface-textured ZnO hemispheres showed the highest EL intensity, which can be attributed to an increase in the effective critical angle, the escape cone, and multiple scattering. Finite difference time domain (FDTD)simulation was conducted to theoretically confirm the experimental results.
An Investigation into the Variability of a Writing Test Using Generalizability Theory
Taejoon Park(박태준) 한국외국어교육학회 2008 Foreign languages education Vol.15 No.1
Because performance assessment such as a composition test introduces a range of factors that may influence the chances of success for a candidate on the test, those in charge of monitoring quality control for performance assessment programs need to gather information that will help them determine whether all aspects of the programs are working as intended. In the present study, generalizability theory (Brennan, 1992) was employed to examine the relative effects of various sources of variability on students" performance on an essay writing test and also to investigate the reliability of the assigned scores. The results showed that due to the largest effect associated with the students" writing ability and negligible effects associated with facets of measurement such as scoring criteria and ratings, the generalizability coefficient estimated for the writing test was high, suggesting that the test is a reliable measure of what it purports to measure, the students" writing ability.