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A Compatible Variables Scheduling Algorithm for Register Allocation in Microprogram
이상정,임인칠,Lee, Sang-Jeong,Lim, In-Chil The Institute of Electronics and Information Engin 1987 전자공학회논문지 Vol.24 No.2
This paper proposes a compatible variables scheduling algorithm, which is the process to pack variables into same register without modifying program semantics, for efficient register allocation of microprogram. The algorithm constructs T-V matrix, obtains incompatible variable set and scheduling priority, and schedules compatible groups. By this algorithm, the number of compatible groups can be minimized. The algorithm was implemented with C language on VAX-11/780 computer. By applying the algorithm to practical microprograms, the effectiveness of the algorithm is verified.
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이상정 ( Sang Jeong Lee ) 서울대학교 법학연구소 2007 서울대학교 法學 Vol.48 No.1
In Korea computer programs are mainly protected by the Computer Programs Protection Act, even though listed as a protectable subject matter of copyright law. So computer programs are protected by sui generis legislation. But the contents of the Computer Programs Protection Act are similar to those of copyright law: the protection of computer programs is based on the mere fact of creation (automatic protection), and registration is not a necessary prerequisite. The term of protection is 50 years from the year following disclosure. The Computer Programs Protection Act excludes Programming languages (characters, signs and a system thereof as a means to express a program), Rules (a specific convention on the usage of programming language in a specific program) and Algorithms (a method of combining instructions and commands in a program) from protection. Exclusion of Algorithms from protection reflects the idea/expression dichotomy. Apart from being protected by the Computer Programs Protection Act, computer programs are also protected by the Patent Law. At first we protected computer programs which met the so-called Freeman-Walter-Abele test. But now we protected the Floppy Disk Claims and the computerized Method of Doing Business as in US and Japan. Even in Japan they regard the computer program as a thing itself. But the term of invention In Korea and Japan Patent Act is a little different from that of US. In Korea and Japan Patent Act the INVENTION means the highly advanced creation of technical ideas utilizing rules of nature. So I think computer programs are not inventions except those which are applied to some physical process or thing. Even though Computer Programs are protectable subject matter, patent protection gives rise to many difficulties as described in the chapter 6 of THE PATENT WARS written by FRED WARSHOFSKY. And cumulative protection also gives rise to many difficulties and contradictions. Because copyright system and patent system are different in many aspects: the philosophy, the requirements, the term of protection, the effect-having block effect or not, and so on. So adequate and appropriate system is needed. Even though we adopted the sui generis legislation, it is limited in form. Legislators have left a room which is filled by appropriate contents from the first. We have to seek the appropriate system. This paper recommends the modified SCPA Approach which is described in a Manifesto as a basic model. But this paper proposes the new act should replace the existing law, even though the Manifesto does not propose a new act should be a substitution of copyright and patent law.
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이상정(Sang-Jeong Lee),전병찬(Byung-Chan Jeon) 한국정보과학회 2004 정보과학회논문지 : 시스템 및 이론 Vol.31 No.1·2
고성능 슈퍼스칼라 프로세서에서 값 예측(value prediction) 방식은 명령의 결과 값을 미리 예측하고, 이 후 데이타 종속 관계가 있는 명령들에게 값을 조기에 공급함으로써 이들 명령들을 모험적으로 실행하여 성능을 향상시키는 방식이다. 값 예측으로 성능을 향상시키기 위해서는 예측 실패 시에 효율적으로 복구하는 과정이 필수적이다. 본 논문에서는 값 예측 실패 시에 잘못 예측된 값을 사용하여 모험적으로 수행된 명령들만을 순차적으로 취소하고 복구한 후에 재이슈하는 값 예측 실패 복구 메커니즘(value misprediction recovery mechanism)을 제안한다. 제안된 복구 방식은 한번에 모든 종속명령들을 검색하지 않음으로써 파이프라인을 정지시키지 않는다. 즉, 파이프라인이 진행되는 순서에 따라 순차적으로 값 예측이 틀린 종속명령만을 선택적으로 취소하고 재이슈하여 불필요한 취소와 재이슈를 줄임으로써 값 예측 실패 시에 손실을 줄인다. Value prediction is a technique to obtain performance gains by supplying earlier source values of its data dependent instructions using predicted value of a instruction. To fully exploit the potential of value speculation, however, the efficient recovery mechanism is necessary in case of value misprediction. In this paper, we propose a sequential and selective recovery mechanism for value misprediction. It searches data dependency chain of the mispredicted instruction sequentially without pipeline stalls and adverse impact on clock cycle time. In our scheme, only the dependent instructions on the predicted instruction is selectively squashed and reissued in case of value misprediction.
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이상정 ( Sang Jeong Lee ) 아세아여성법학연구소 2001 아세아여성법학 Vol.4 No.-
The Right of Publicity prevents the unauthorized commercial use of an individual`s name, likeness, or other recognizable aspects of one`s persona. It gives an individual the exclusive right to license the use of their identity for commercial promotion. In the United States, the Right of Publicity is first recognized in Haelan Case and now largely protected by state common or statutory law. In Korea the Right of Publicity is recognized and mainly protected through the law of tort competition law and Copyright law may apply to the infringement of the Right Publicity. This Paper compose of 5 chapter : 1) Introduction, 2) The Right, 3) The subject and object of the right, 4) Remedies, 5) Conclusion. This paper contains; (1) whether the Right of Publicity is assignable and descendible(inheritable). (2) who has the Right of Publicity: Does only famous person have the Right of Publicity? (3) the scope of the Right of Publicity; Is {Lim, Ggug-Jeong court of Korea} and {Vanna Wbite court of US} right? (4) whether Injunctive Relief is available in Korea Legal System. As to topic (1) I think it`s not assignable but descendible. So general succession is admitted, but singular succession is not permitted. As to topic (2) I think that every (natural and legal) person who has the power to attract the public has the Right of Publicity. As to topic (3) I do not agree with 2 decisions. Both of them go too far. As to topic (4) I think that injunctive relief is available in Korea. As conclusion I suggest it`s more preferable to legislate on the Right of Publicity.
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Analyzing Thermal Variations on a Multi-core Processor
이상정(Sang-Jeong Lee),Pen-Chung Yew 大韓電子工學會 2010 電子工學會論文誌-CI (Computer and Information) Vol.47 No.6
본 논문에서는 멀티코아 프로세서 상에서 프로세서와 메모리를 집중적으로 사용하는 다양한 워크로드들에 대한 온도특성을 연구한다. 일반적으로 프로세서의 온도관리를 위한 측정 지표로 평균온도와 온도범위 보다는 온도변화의 정도가 더 중요하다. 따라서 본 논문에서는 프로그램 실행 중에 온도변화를 분석하고, 워크로드의 온도변화의 정도를 정량화하는 측정 지표를 제안한다. 제안된 온도변화 측정 지표를 사용하여 인텔 Core 2 Duo 프로세서 상의 SPEC CPU2006 벤치마크들에 대해 쿨링 조건 및 클럭 주파수를 변경해 가며 온도변화를 분석한다. 분석 결과, 각 벤치마크 프로그램에 따라 서로 다른 유형의 온도 변화를 보였다. 이러한 온도변화는 쿨링 조건과 동작 클럭 주파수 및 멀티프로그래밍 워크로드에 영향을 받았다. 또한 코아들 사이의 공간적 위치에 따라서도 다른 온도 변화 특성을 보였다. 본 논문에서 제안된 온도변화 측정 지표와 연구 분석된 결과들은 향후 멀티코아 온도관리를 위한 연구에 활용하면 효과적인 온도관리가 기대된다. This paper studies thermal characteristics of a mix of CPU-intensive and memory-intensive application workloads on a multi-core processor. Especially, we focus on thermal variations during program execution because thermal variations are more critical than average temperatures and their ranges for thermal management. New metrics are proposed to quantify such thermal variations for a workload. We study the thermal variations using SPEC CPU2006 benchmarks with varying cooling conditions and frequencies on an Intel Core 2 Duo processor. The results show that applications have distinct thermal variations characteristics. Such variations are affected by cooling conditions,operating frequencies and multiprogramming workload. Also, there are distinct spatial thermal variations between cores. Our new metrics and their results from this study provide useful insight for future research on multi-core thermal management.
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웹 GUI 기반 스마트 팩토리 공정 관리 및 공유 시스템
이상정 ( Sang-jeong Lee ),홍석준 ( Seok-jun Hong ),정택성 ( Taek-sung Jung ),한건욱 ( Geon-uk Han ),이인혜 ( In-hye Lee ),정민교 ( Min-kyo Jeong ),민홍 ( Hong Min ) 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.2
최근 사물인터넷 분야에서 스마트 팩토리 부분은 많은 주목을 받고 있으며 관련된 연구도 많이 진행되고 있다. 기존의 스마트 팩토리 플랫폼은 제품 생산 효율성을 높여 비용을 줄이는 것을 목표로 센서로부터의 데이터 수집과 클라우드로의 전송, 대규모 데이터 분석을 통한 의사결정 등 자동화 부분에 집중되어 있다. 본 논문에서는 웹 GUI를 활용하여 응용 개발의 편의성을 높여 개발자가 아닌 공정관리자가 직접 공정을 제어할 수 있도록 했으며 유사 환경이 구축된 다른 공장에서 기존에 만들어진 공정 프로그램을 공유하고 재수정할 수 있는 시스템을 설계하였다. 또한, 프로토타입을 구현하여 제안된 웹 GUI기반 스마트 팩토리 공정 관리 및 공유 시스템의 운용 가능성을 검증하였다.
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