• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 가을 학술발표논문집 Vol.33 No.2 (A)
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• pp.479-483
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• 2006

수퍼스칼라 프로세서 구조의 성능을 분석할 때, 실행 구동형 모의실험 및 트레이스 구동형 모의실험이 광범위하게 수행되고 있으나, 시간과 공간을 많이 차지하고 또한 성능에 대한 근본 원리를 규명하기 어려운 단점이 있다. 본 논문은 수퍼스칼라 프로세서의 성능에 대하여 통찰력을 갖고, 이것을 기반으로 수퍼스칼라 프로세서의 모델을 마련하기 위하여 수퍼스칼라 프로세서의 윈도우의 크기와 이슈폭에 대한 관계를 규명하였다. 이것을 위하여 SPEC 2000 정수형 벤치마크 프로그램을 입력으로 하는 트레이스 구동 모의 실험을 통하여 윈도우의 크기와 매 싸이클당 이슈되는 명령어의 개수에 대한 관계식을 도출하였으며, 그 정확도는 평균 9.5 %를 기록하였다.

• KSBB Journal
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• 제9권5호
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• pp.457-463
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• 1994

곰팡이 세포농도를 측정하기 위하여 pellet에 대한 침강 특성을 고려하여 홉광도를 측정하는 새로운 방법을 개발하였다$.$ Pellet의 침강을 막기 위해 spec trophotometer의 cuvette 내에셔 소형 마그네닥바 로 시료를 적절히 교반시켰는데 그 결과 안정된 값의 흡광도를 얻을 수 있었으며 세포의 건조중량과 흡광도간에 선형적인 관계가 었는 것으로 나타났다. 그러나 크기별로 pellet입자를 분리한 결과 입자 크 기별로 통일한 흡광도에서 셔로 다른 건조중량을 갖는 것으로 나타났으며 입자의 직경이 $355{\mu}m$ 이상인 경우 교반에 의한 홉광도를 측정할 수 없었다. 이상의 결과로부터 pellet을 형성하는 곰팡이 배양액의 경우 pellet의 침강 특성을 고려해 줌으로써 흡광도 를 이용한 곰팡이 세포농도의 측정이 가능하다는 결론을 얻었다.

• 한국의류학회지
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• 제18권1호
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• pp.43-56
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• 1994

The Purpose of this study was to utilize of CAD System in pattern making process for women's apparel. The automation by the use of CAD System provides the higher accuracy and efficiency in pattern making process. AccuMark 300 System was used. for .this study. The results from this study were as follows . 1. New size spec chart and grading pitch chart were developed based on the data analysis and fitting tests for female college students. 2. New jacket block was developed based on the torso length sloper 3. Automatic grading of jacket block have been developed by creation and modification of grading rules of block pattern. 4. Pattern Design Systyem(P/D/S) were enabled to be constructed directly form a block pattern by modifications to existing styled pattern. 5. Original master pattern was generated by P/D/S menu option. 6. Production pattem added seam allowance, notchs was generated by P/D/S menu option. 7 Interative maker making process have enabled to save a wide range of time and space. 8. Measurement of garment by P/D/S measuring tools is to utilize in garment costing, quality control.

• 전기학회논문지
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• 제61권10호
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• pp.1502-1507
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• 2012

In order to overcome the hardware complexity and power consumption problems, recently the multi-core architecture has been prevalent. For hardware simplicity, usually RISC processor is adopted as the unit core processor. However, if the performance of unit core processor is enhanced, the overall performance of the multi-core processor architecture can be further increased. In this paper, out-of-order superscalar processor is utilized for the multi-core processor architecture. Using SPEC 2000 benchmarks as input, the trace-driven simulation has been performed for the out-of-order superscalar cores between 2 and 16 extensively. As a result, the 16-core out-of-order superscalar processor for the window size of 16 resulted in 17.4 times speed up over the single-core out-of-order superscalar processor, and 50 times speed up over the single core RISC processor. When compared for the same number of cores on the average, the multi-core out-of-order superscalar processor performance achieved 3.2 times speed up over the multi-core RISC processor and 1.6 times speed up over the multi-core in-order superscalar processor.

• 천문학회보
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• 제37권1호
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• pp.46.2-46.2
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• 2012

The black hole mass-stellar velocity dispersion ($M_{BH}-{\sigma}_*$) relation observed in the present-day universe has motivated numerous studies on the black hole-galaxy co-evolution. It is crucial to define the$M_{BH}-{\sigma}_*$ local active galaxies since cosmic evolution of the correlations is calibrated based on the local relation. However, stellar velocity dispersion is difficult to measure in active galaxies due to much higher AGN continuum than stellar pseudo-continuum, resulting in a small sample with reliable velocity dispersion measurements for studying the AGN $M_{BH}-{\sigma}_*$ relation. To increase the sample size and improve the measurements, we obtained high S/N near-IR spectra for 3 local AGNs, i.e., NGC 3227, Akn 120, 3C 390.3, for which reverberation black hole masses are measured, using the TripleSpec at the Palomar 5-m Telescope. By investigating aperture effect and correcting for rotation component, we determine the luminosity-weighted ${\sigma}_*$, based on the spatially resolved kinematics and compare them with optical measurements from literature. Combining our new measurements with literature data, we present an improved $M_{BH}-{\sigma}_*$ relation for the enlarged sample of reverberation-mapped AGNs.

• 한국분무공학회지
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• 제19권2호
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• pp.69-74
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• 2014

The comparison of the flow characteristics between circular and swirl jets which were controlled by the spinner attachment inside the airtube were conducted in this study. Swirl jet means a flow in whirls by mixing the flow of axial and tangential direction. Swirl flow has been used for the improvement of the combustion efficiency in the combustor. This flow is controlled by the spinner which has several vanes inclined by certain angles to the axial direction. In this study, angle of vane $30^{\circ}$ and diameter ratio of outlet to inlet of the airtube 0.73 were made. These spec. should find on the general gun type burner built in the domestic small size boiler. As the flow characteristics, axial and tangential velocities were measured by using the 2-D hot-wire velocimeter system and analyzed statistically. And also this research conducted a practical experiment considering to the attached belongings likes as ignitor, nozzle etc. on the airtube of the gun type burner. As a result, swirl occurred at the occasion of beingness and flow region extended considerably toward the radial direction. But effect of swirl did not transmit to the downstream. And the complicated flow was appeared regardless of the existence of spinner because of the effect of belongings.

• 한국가구학회지
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• 제23권4호
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• pp.467-478
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• 2012

Interurban railway is expanded by transportation that population can be centralism and cope efficiently in traffic jam by augmentation of vehicles in the city. Railroad chair departs in space of an existent simple rest and products that can raise human body standard and size by powerful engineering vicinity, quality of the material, psychological satisfaction etc. of users are developed steadily. Specially, study of space that can use various materials efficiently with bodily size government official because various of man and woman old and the young etc.. are using in occasion of the train is urgently required. Specially, railroad chair is a product that material and standard, structure, human body engineering, a finish etc. is studied variously. In the case of advanced nation, in case of design a chair operating time of railroad, is placed as all standards orderly and harmonious because is considered exercise dynamics etc.. and designs. The other side, in the case of our country, study expert of chair is short real and is depending on technological data of overseas railway vehicle. Chair for railroad must consider removal of short-range, long distance. That have to be consider to a lot of uncomfortable such as psychological satisfaction of user because the domestic Motor Companies are defining in fair development study and many researchers but the railroad chair company are not accumulated professional manpower and technological know-how. Railway vehicle can recognize that overseas visitors as well as native is important element as space that space is exposed internationally by product that Public personality which used cultural value is strong. Therefore, wish to plan valid spec relationship presentation of various design and specification, function etc.. and contribute to railroad chair development design process lists and analyzes van instances of railway vehicle chair of inside and outside of the country through this study.

• 정보처리학회논문지A
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• 제14A권3호
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• pp.173-184
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• 2007

가비지 컬렉션은 자바 가상 머신의 핵심적인 기능으로서 개발자들이 겪는 메모리 관리의 어려움을 줄여준다. 본 논문에서는 임베디드 자바 가상 머신을 위한 가비지 컬렉터인 GenGC와 GenRGC의 성능을 평가하고 분석한다. 성능 평가를 위하여 썬 마이크로시스템즈사에서 개발한 실제 임베디드 자바 가상 머신인 CVM을 플랫폼으로 사용하며, SpecJVM98을 벤치마크 프로그램 집합으로 사용한다. 첫째, GenGC와 GenRGC의 성능을 비교하기 위하여 힙의 크기 및 각 영역의 크기를 변화시키면서 가비지 컬렉션 수행 시간 및 지연 시간을 비교한다. 둘째, GenRGC의 성능을 보다 세밀하게 분석하기 위하여 힙의 구성 요소 중 블록과 프레임의 크기를 변화시키면서 가비지 컬렉션 수행 시간 및 지연 시간을 측정하여 분석한다. 셋째, GenRGC를 사용하기 위하여 필요한 저장 공간의 크기를 분석하고, GenRGC가 제한된 메모리를 가지는 임베디드 환경에서 적합하다는 것을 보인다. CVM은 가장 대표적인 임베디드 자바 가상 머신이므로, 이와 같은 성능 연구는 실제 응용 환경에서 가비지 컬렉터의 성능을 보다 정확히 예측할 수 있다는 점에서 큰 의미를 갖는다.

• 복식문화연구
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• 제9권2호
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• pp.175-187
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• 2001

The purpose of this study is to recognize the real situation of clothing construction to present the desirable direction to establish more scientific and reasonable themes of the study by analysis of the tendency of the clothing construction study. For this purpose, 402 papers on the theme of clothing construction study were excepted from the first issues to the issues of December in 1999 of Journal of Korea Society of Clothing and Textile, Journal of Korea Home Economics, Journal of the Korean Society of Costume, Research Journal of the Costume Culture, Journal of the Korean Fiber Society, and Journal of the Human Engineering Society of Korea. I analyzed and classified the theme into eight issues of design related clothing construction, study of body types, study of patterns, size of apparel, fitting of clothing, protective clothing and functional clothing, sewing, and the clothes. The result of the study is follows. 1. The distribution tendency of the clothing construction study by the journal of each society showed that journal of Korean Home Economic is 22.9%, Journal of Korea Society of Clothing and Textiles 17.3%, Research Journal of the Costume Culture 12.2%, and Journal of the Korean Society of Costume 6.2%. 2. The distribution tendency of the studying issues showed hat study of body types of 29.4%, study of patterns21.9%, fitting of clothing 11.7%, sewing 10.2%, size of apparel 8.5%, and others 7%, protective clothing and functional clothing 6.7%, and design related clothing construction 4.7%. Considering the above result. we can understand that study of body types and patterns are being studied most actively. 3. Regarding the study tendency by academic issues showed that study of construction elements and design application is chiefly centered of the study of design related clothing construction (35.5%), analysis of body types is centered of the study of body, type(46/6%), CAD is centered of the study of patterns (31.1%), and size spec for the ready made patterns is centered of the study of size of apparel(32.4%). As for fitting of clothing, the study was performed in two ways on the changes of he surfaces of human bodies in motion and the functional features of experimental dressing. Regarding the study of sewing study of fusible interlining was mainly performed (36.6%) and regarding the study of protective clothing and functional clothing, study of brassieres and underwear was chiefly performed.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1998년도 추계학술대회
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• pp.285-286
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• 1998

Virtual Brain-endoscopy is an effective method to detect lesion in brain. Brain is the most part of the human and is not easy part to operate so that reconstructing in 3D may be very helpful to doctors. In this paper, it is suggested that to increase the reliability, method of matching 3D object with the 2D CT slice. 3D Brain-endoscopy is reconstructed with 35 slices of 2D CT images. There is a plate in 3D brain-endoscopy so as to drag upward or downward to match the relevant 2D CT image. Relevant CT image guides the user to recognize the exact part he or she is investigating. VRML Script is used to make the change in images and PlaneSensor node is used to transmit the y coordinate value with the CT image. The result is test on the PC which has the following spec. 400MHz Clock-speed, 512MB ram, and FireGL 3000 3D accelerator is set up. The VRML file size is 3.83MB. There was no delay in controlling the 3D world and no collision in changing the CT images. This brain-endoscopy can be also put to practical use on medical education through internet.