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The Analytic Performance Model of a Superscalar Digital Signal Processor
Jongbok Lee 한국멀티미디어학회 2008 한국멀티미디어학회 국제학술대회 Vol.2008 No.-
This paper presents an analytic performance model of a superscalar digital signal processor based on the relation of the window size and the instruction issue width, branch mispredictions, instruction cache misses and data cache misses. We describe our design and evaluate it with the UTDSP benchmarks. As a result, our performance model achieves the mean error which is less than 5 %.
An Analytical Embedded Microprocessor Performance Model using Instruction Dependencies
Jongbok Lee 대한전자공학회 2010 ICEIC:International Conference on Electronics, Inf Vol.1 No.1
In the initial design phase of embedded microprocessors, a performance model is necessary. By using not only the relation between the instruction window size and the issue width, but also the effects of the limited functional units and instruction dependencies, a theoretical performance model for an embedded superscalar microprocessor is proposed. By using trace-driven data of MiBench programs as input, this paper shows that the theoretically computed performance is quite similar to the measured value.
Thermodynamic Synthesis of Ladder-Type Functional Organic/Polymer Materials
Jongbok Lee(이종복) 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Conjugated ladder-type macromolecules represent a captivating class of materials on account of their well-defined rigid structures, intriguing syntheses, and promising potential in optoelectronic applications. The ladder-type backbones possess an intrinsically rigid conformation and limit possible torsional disorder. The unique architecture of conjugated ladder-type materials leads to extended π-conjugation length, longer exciton diffusion length, and enhanced stability, compared to conventional conjugated materials. New synthetic strategy employing ring-closing metathesis successfully afforded well-defined ladder-type materials in excellent yields. This research provides a well-established synthetic strategy to construct a fully conjugated ladder-type material and a fundamental understanding of ladder-type functional organic materials for potential future applications in electronic and optoelectronic devices.
A Survey of Teaching Stresses of Native English Teachers in Korea
( Jongbok Lee ) 현대영미어문학회 2009 현대영미어문학회 추계학술대회 발표논문집 Vol.2009 No.-
The purpose of this study is to find out the factors of teaching stresses from native English teachers who are working at a Korean university. These days, college English education managed by inviting native English teachers becomes popular. In this situation, it is important to figure out how to increase efficiency of English education conducted by native English teachers. Therefore, as one of the methods to manage native English teachers, this survey focused on the teaching stresses by taking a survey toward 26 native English teachers who engaged in N university.
A First-Order Superscalar Processor Model with Limited Resources
Jongbok Lee 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
This paper proposes a performance model for superscalar processors which consists of the relationship between component instructions issued per cycle and the size of the instruction window, penalties due to branch mispredictions, instruction cache misses, data cache misses, and the limits from the number of functional units. The key idea is noticing that the average number of each component IPC cannot exceed the dedicated number of each functional unit. Using trace-derived data dependence information, the model can compute performance within accuracy for various window sizes and functional unit configurations without re-executing the whole simulation process.
Prediction of Carcass Composition Using Carcass Grading Traits in Hanwoo Steers
Lee, Jooyoung,Won, Seunggun,Lee, Jeongkoo,Kim, Jongbok Asian Australasian Association of Animal Productio 2016 Animal Bioscience Vol.29 No.9
The prediction of carcass composition in Hanwoo steers is very important for value-based marketing, and the improvement of prediction accuracy and precision can be achieved through the analyses of independent variables using a prediction equation with a sufficient dataset. The present study was conducted to develop a prediction equation for Hanwoo carcass composition for which data was collected from 7,907 Hanwoo steers raised at a private farm in Gangwon Province, South Korea, and slaughtered in the period between January 2009 and September 2014. Carcass traits such as carcass weight (CWT), back fat thickness (BFT), eye-muscle area (EMA), and marbling score (MAR) were used as independent variables for the development of a prediction equation for carcass composition, such as retail cut weight and percentage (RC, and %RC, respectively), trimmed fat weight and percentage (FAT, and %FAT, respectively), and separated bone weight and percentage (BONE, and %BONE), and its feasibility for practical use was evaluated using the estimated retail yield percentage (ELP) currently used in Korea. The equations were functions of all the variables, and the significance was estimated via stepwise regression analyses. Further, the model equations were verified by means of the residual standard deviation and the coefficient of determination ($R^2$) between the predicted and observed values. As the results of stepwise analyses, CWT was the most important single variable in the equation for RC and FAT, and BFT was the most important variable for the equation of %RC and %FAT. The precision and accuracy of three variable equation consisting CWT, BFT, and EMA were very similar to those of four variable equation that included all for independent variables (CWT, BFT, EMA, and MAR) in RC and FAT, while the three variable equations provided a more accurate prediction for %RC. Consequently, the three-variable equation might be more appropriate for practical use than the four-variable equation based on its easy and cost-effective measurement. However, a relatively high average difference for the ELP in absolute value implies a revision of the official equation may be required, although the current official equation for predicting RC with three variables is still valid.
토익성적 향상에 나타난 학습신념과 학습전략 간 관계 분석
이종복(Lee, Jongbok),주대환(Ju, Daehwan) 신영어영문학회 2020 신영어영문학 Vol.77 No.-
The purpose of this study is to investigate the relationships of college students’ beliefs and strategies based on TOEIC achievements. There are two groups of students. The first group consists of 35 students out of 67, who acquire relatively lower academic achievements than those students whose TOEIC scores improved more than overall average. For this purpose, the study focuses on (1) the aspect of the correlation of learning beliefs and strategies between the two groups, (2) the aspect of the correlation among the subcategories of the variables between the groups, (3) the aspect of the cause and effect relation among the subcategories in each group. The findings of this study are as follows: First, learning beliefs and strategies correlate with each other in both groups. Second, correlation among subcategories in the high achievement group is slightly larger than the one in the low achievement group. Third, the cause and effect relation indicates that every subcategory in students’ beliefs on learning increases the use of learning strategies in both groups.
수퍼스칼라를 위한 이중 적응형 다중 분기 예측법에 대한 연구
이종복(Jongbok Lee),성원용(Wonyong Sung),문수묵(SooMook Moon) 한국정보과학회 1996 한국정보과학회 학술발표논문집 Vol.23 No.2B
본 논문에서는 주 어드레스 단위 분기 히스토리 (per-primary address history scheme)를 사용하는 이중 적응형 다중 분기 예측법(two-level adaptive multiple branch prediction)에 대한 연구를 수행하였다. 이 방식에서는 하드웨어에 대한 공유를 줄여서 기존의 전역 히스토리 방식의 단점인 간섭 현상을 극복할 수 있다. 또한 매 싸이클마다 예측되는 분기 명령어들은 같은 분기군 내에서 선행하는 분기 예측에 대하여 비종속적으로 얻어진다. 실험 결과에 의하면 주 어드레스 단위 히스토리 방식은 같은 하드웨어 비용을 목표로 할 경우에 기존의 방식보다 더 높은 예측 정확도를 나타낸다. 두 개의 분기명령어를 동시에 예측할 때, 정수형 벤치마크에 대한 평균 예측 정확도는 92.0%에서 96.9% 사이의 값을, 실수형 벤치마크의 경우에는 94.8%에서 95.8% 사이의 값을 나타낸다.