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고성능 내장형 프로세서의 에너지 소비 감소를 위한 데이타 캐쉬 통합 설계 방법
심성훈(Sunghoon Shim),김철홍(Cheol Hong Kim),장성태(Seong Tae Jhang),전주식(Chu Shik Jhon) 한국정보과학회 2006 정보과학회논문지 : 시스템 및 이론 Vol.33 No.3·4
현재 내장형 프로세서에서 캐쉬 사이즈는 더 많은 트랜지스터 집적도와 낮은 공급 전력에 기인하여 점점 더 증가 되어지는 추세이다. 하지만 캐쉬 사이즈가 커질수록 더욱 더 많은 에너지 소비가 발생하게 되며, 결과적으로 프로세서 전체에서 소비하는 에너지 중에서 캐쉬에서 소비되는 에너지의 비중이 점점 더 증가 되고 있다. 이에 따라 캐쉬 에너지 소비를 줄이기 위한 많은 기법들이 제시되어져 왔다. 하지만 이러한 기존의 기법들은 캐쉬 에너지 소비의 2가지 방면, 즉, 정적 캐쉬 에너지 소비와 동적 캐쉬 에너지 소비 중에서 어느 한쪽에 초점을 맞추어 제시되어진 기법들이었다. 본 논문에서는 고성능 내장형 프로세서에서 캐쉬 에너지 소비의 2가지 방면인, 정적 캐쉬 에너지 소비와 동적 캐쉬 에너지 소비를 동시에 감소시키는 정적 에너지 소비 감소와 동적 에너지 소비 감소의 통합 기법을 제안한다. 이 통합 기법에는 이미 제안되어진 두 가지 기법, 동적 에너지 소비를 감소시키기 위한 웨이 예측 기법과 정적 에너지 소비를 감소시키기 위한 드라우지 캐쉬(drowsy cache) 기법을 적용한다. 또한 드라우지 캐쉬 기법을 사용하였을 때 생기는 추가적인 프로그램 실행 사이클들을 줄이기 위한 “프로그램 카운트를 이용하는 드라우지 상태의 데이타 캐쉬 라인 미리 깨움” 기법을 제안한다. 이러한 기법 적용을 레벨 1 데이타 캐쉬에 적용한다. 제안 되어진 통합 기법을 통해서 정적 데이타 캐쉬 에너지 소비와 동적 데이타 캐쉬 에너지 소비를 동시에 줄일 수 있게 되며, 같이 제안되어진 “드라우지 상태의 데이타 캐쉬 라인 미리 깨움”기법은 통합 기법때문에 발생하는 추가적인 프로그램 실행 사이클의 증가를 감소시킬 수 있다. The cache size tends to grow in the embedded processor as technology scales to smaller transistors and lower supply voltages. However, larger cache size demands more energy. Accordingly, the ratio of the cache energy consumption to the total processor energy is growing. Many cache energy schemes have been proposed for reducing the cache energy consumption. However, these previous schemes are concerned with one side for reducing the cache energy consumption, dynamic cache energy only, or static cache energy only. In this paper, we propose a hybrid scheme for reducing dynamic and static cache energy, simultaneously. for this hybrid scheme, we adopt two existing techniques to reduce static cache energy consumption, drowsy cache technique, and to reduce dynamic cache energy consumption, way-prediction technique. Additionally, we propose a early wake-up technique based on program counter to reduce penalty caused by applying drowsy cache technique. We focus on level 1 data cache. The hybrid scheme can reduce static and dynamic cache energy consumption simultaneously, furthermore our early wake-up scheme can reduce extra program execution cycles caused by applying the hybrid scheme.
Bandgap engineered reverse type-I CdTe/InP/ZnS core–shell nanocrystals for the near-infrared
Kim, Sunghoon,Shim, Wooyoung,Seo, Heonjin,Hyun Bae, Je,Sung, Jaeyoung,Choi, Seung Hong,Moon, Woo Kyung,Lee, Gwang,Lee, Bunyeoul,Kim, Sang-Wook Royal Society of Chemistry 2009 Chemical communications Vol.2009 No.10
<P>New quantum dots were fabricated with a core/shell/shell structure consisting of CdTe core/InP shell/ZnS shell of which the InP shell causes a red-shift to the NIR region and the ZnS shell imparts photo-stability; toxicity tests on mammalian cells and NIR imaging of a mouse highlight their potential applications in biomedical imaging.</P> <P>Graphic Abstract</P><P>New quantum dots were fabricated with a core/shell/shell structure consisting of CdTe core/InP shell/ZnS shell. The InP shell causes a red-shift to the NIR region and the ZnS shell imparts photo-stability. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b820864f'> </P>
Joonyong SHIM,Jae-Min JUNG,Dae-hyeon Byeon,Sunghoon JUNG,Wang-Hee Lee 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.3
Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae), a global forest pest, has a potential to damage forests in South Korea, requiring an effective tool for evaluating its potential distribution. This study aimed to evaluate the spatial distribution of A. glabripennis in South Korea by simultaneously considering climate and host plants. Climatic suitability was firstly evaluated using a CLIMEX model; then, it was combined with the areal distribution of host plants using a simple mathematical formulation. We finally projected the spatial distribution of A. glabripennis onto the map of administrative districts to identify hazardous areas to watch. As a result, the developed model predicted that over 40% of areas in South Korea could be exposed to A. glabripennis damage, and most of them were located in mountainous areas with abundant host plants. In addition, climatic suitability was higher in coastal areas, which was different than a previous record of A. glabripennis occurrence, while the prediction by a comprehensive model was consistent with the record. In conclusion, the model including both climate and host plant occurrence was more reliable than the model which only included climate, and could provide useful data for determining areas for monitoring and control.
( Yoo-na Kim ),( Yeeun Shim ),( Yong Jae Lee ),( Sang Wun Kim ),( Saeam Shin ),( Sunghoon Kim ),( Jong Rak Choi ),( Seung-tae Lee ),( Jung-yun Lee ) 대한산부인과학회 2022 대한산부인과학회 학술대회 Vol.108 No.-
Objective: Understanding and appropriately tailoring therapy for ovarian cancer patients who progress on PARP inhibitor (PARPi) is a pressing agenda. Our objective was to investigate the patient-specific resistance mechanism and its implication on post-progression therapy via serially collected ctDNA. Methods: Patients with BRCA mutated ovarian cancer receiving PARPi were prospectively enrolled since January 2018. Whole blood samples were collected every 3 months. Extracted cell-free DNA were target enriched with TMB500 panel, sequenced with Novaseq 6000 system (Illumina), and analyzed using PiSeq (Dxome). Clinical information, including progression-free survival (PFS) to PARPi and to post-progression therapy (PFS2-PFS1) and overall survival (OS) post-progression, were collected. Results: Serial samples from 54 patients were analyzed. Analysis of pre-PARPi samples showed an improved PFS to PARPi in patients without mutation in resistance mechanism-associated genes. BRCA reversion and hypomorphism were identified in 3 and 1 patients, respectively. Matched samples from 29 patients showed an increased in TMB and a spectrum of post-specific, acquired mutations. These acquired mutations highlighted non-exclusive resistance mechanisms, including HR restoration (28%), replication fork stability (34%), and G1/S defect (i.e., ATM, CHEK2, and TP53, 55%), which were potential targets for ATR inhibitor. Among patients with matched samples, post-progression therapy information were available in 22 patients, including 7 patients receiving PARPi re-treatment. Patients with acquired mutations in HR restoration-associated genes showed poor OS post-progression. Conversely, those without any acquired mutation or with mutations involving single resistance mechanism showed a trend of favorable response to subsequent platinum-based therapy and PARPi re-treatment. Conclusion: Serial ctDNA may help predict response to PARPi as well as provide important prognostic and predictive clues for post-progression therapy in ovarian cancer.
Jangsik In,Yoonsung Han,Sunghoon Kim,Jaechul Shim,Jongill Hong 한국자기학회 2006 Journal of Magnetics Vol.11 No.3
We successfully enhanced the performance of a spin valve by inserting an ultra-thin layer of partially oxidized Fe in the pinned and free layers. With the exchange bias field kept large, the spin valve reached a GMR of 12%, which corresponded to a 55% increase in GMR when we compared it with that of spin valves without any inserted layer. The layer of partially oxidized Fe was more effective for improving the properties of the spin valve than the layer of partially oxidized Co??Fe₁?. Considering all the results, we can contribute the significant improvement to the combined effect of the modified local electronic structures at the Fe impurities and the enhanced spin-dependent reflections at the α-Fe₂O₃ phase in the magnetic layer.
Geometry Guided Three-Dimensional Propagation for Depth From Small Motion
Shin, Seunghak,Im, Sunghoon,Shim, Inwook,Jeon, Hae-Gon,Kweon, In So IEEE 2017 IEEE signal processing letters Vol.24 No.12
<P>In this letter, we present an accurate Depth from Small Motion approach, which reconstructs three-dimensional (3-D) depth from image sequences with extremely narrow baselines. We start with estimating sparse 3-D points and camera poses via the structure from motion method. For dense depth reconstruction, we propose a novel depth propagation using a geometric guidance term that considers not only the geometric constraint from the surface normal, but also color consistency. In addition, we propose an accurate surface normal estimation method with a multiple range search so that the normal vector can guide the direction of the depth propagation precisely. The major benefit of our depth propagation method is that it obtains detailed structures of a scene without fronto-parallel bias. We validate our method using various indoor and outdoor datasets, and both qualitative and quantitative experimental results show that our new algorithm consistently generates better 3-D depth information than the results of existing state-of-the-art methods.</P>