• Title/Summary/Keyword: Reverse annealing

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Simulated-Annealing Improvement Technique Using Compaction and Reverse Algorithm for Floorplanning with Sequence-Pair Model (Sequence-Pair 모델 기반의 블록 배치에서 압축과 배치 역변환을 이용한 Simulated-Annealing 개선 기법)

  • Seong, Young-Tae;Hur, Sung-Woo
    • Proceedings of the Korean Information Science Society Conference
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    • 2008.06b
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    • pp.598-603
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    • 2008
  • Sequence-Pair(SP)는 플로어플랜을 표현하는 모델 중 하나로써, 일반적으로 SP 모델을 사용하는 플로 어프래너 (floorplanner)는 Simulated-Annealing (SA) 알고리즙을 통해 해 탐색 과정을 수행한다. SP 모델을 이용한 다양한 논문에서 플로어플랜 성능 향상을 위해 평가함수의 개선과 스케줄링 기법 향상을 모색하였으며, 평가함수의 경우 O(nlogn) 시간 알고리즘이 존재한다. 본 논문에서는 SP 모델을 이용한 SA 기법에서 SA의 해 탐색 과정 중 초기 해 탐색 시점에서 좋은 해를 빠르게 찾을 수 있는 방법을 제안한다. 제안 기법은 기존의 SA 프레임펙을 수정한 2단계 SA 알고리즘으로써 SP에 대응하는 배치를 압축하고 압축한 배치를 역변환하는 과정으로 구성된다. 실험과 결과를 통해 제안기법의 효과를 보이며, 평균적으로 동일한 SA 환경 하에서 제안기법이 최종결과 면에서 우수함을 보인다.

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Studies on the Polymeric Membranes for Separation(IV) Preparation and Properties of Cellulose Acetaste Membranes for Reverse Osmosis (고분자분리막에 관한 연구(IV) 역삼투용 Cellulose Acetate막의 제조 및 특성)

  • 윤규식;김종호;탁태문
    • Membrane Journal
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    • v.3 no.3
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    • pp.117-125
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    • 1993
  • The CA reverse osmosis membranes were prepared and were studied the effects of parameters in membrane performance. The dope solutions were composed of polymer, formamide, acetone and 2-methoxyethanol. And it was prepared flat type membranes. The membranes were measured flux and rejection. The experimental factors such as polymer concentration, additive type, solvent evporation period, annealing temperture, and applied pressure were changed to investigate the effects of these on the membranes. And the transport parameters were also calculated at reverse osmosis medel for prepared membranes.

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Detection of bovine coronavirus in fecal samples by reverse transcriptase polymerase chain reaction (RT-PCR 기법을 이용한 분변내 소 코로나바이러스 검출)

  • 안재문;조우영;이종인;조부제
    • Korean Journal of Veterinary Service
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    • v.22 no.3
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    • pp.239-245
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    • 1999
  • The reverse transcriptase polymerase chain reaction (RT-PCR) was used for the detection of bovine coronavirus (BCV) in fecal samples by using reverse transcriptase and two primers which flanked M gene sequence of 407bp. RT-PCR detected bovine coronavirus specifically, but did not detect mouse hepatitis virus (MHV), transmissible gastroenteritis virus (TGEV), and bovine rotavirus (BRV). The M gene sequences of MHV are homologus to that of BCV, but minor differences exist in the primer regions, preventing annealing of the primers. Detection of BCV using RT-PCR was compared with ELISA and the agreement of BCV detection by RT-PCR and ELISA was 95.3%. RNA detection in positive clinical specimens was significantly better by PCR than immunological detection of BCV by ELISA.

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Local Laser Annealing in Exchange-Biased Films with Out-of-Plane and In-Plane Magnetic Anisotropy

  • Choi, S.D.;Kim, S.W.;Jin, D.H.;Yun, D.K.;Lee, M.S.;Ahn, J.H.;Joo, H.W.;Lee, K.A.;Lee, S.S.;Hwang, D.G.
    • Journal of Magnetics
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    • v.11 no.2
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    • pp.66-69
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    • 2006
  • Local magnetization reversal in the exchange-biased NiFe/FeMn and $[Pd/Co]_5/FeMn$ multilayers with in-plane and out-of-plane magnetic anisotropy was achieved by using laser annealing. The local annealed NiFe/FeMn film under the opposite magnetic field shows a magnetoresistance (MR) curve having two symmetric peaks at the positive and negative exchange biasing field (${\pm}H_{ex}$). The intensity of the nucleated MR peak rises as the exposed area extends during the laser annealing process, and the peak disappears under the reverse magnetic field. In the case of [Pd/Co]/FeMn films, the local magnetization reversal increased gradually as the laser power increases. The locally reversed magnetization was restored under the opposite magnetic field.

Effects of Annealing on Solution Processed n-ZTO/p-SiC Heterojunction (용액 공정으로 형성된 n-ZTO/p-SiC 이종접합 열처리 효과)

  • Jeong, Young-Seok;Koo, Sang-Mo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.8
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    • pp.481-485
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    • 2015
  • We investigated the effects of annealing on the electrical and thermal properties of ZTO/4H-SiC heterojunction diodes. A ZTO thin film layer was grown on p-type 4H-SiC substrate by using solution process. The ZTO/SiC heterojunction structures annealed at $500^{\circ}C$ show that $I_{on}/I_{off}$ increases from ${\sim}5.13{\times}10^7$ to ${\sim}1.11{\times}10^9$ owing to the increased electron concentration of ZTO layer as confirmed by capacitance-voltage characteristics. In addition, the electrical characterization of ZTO/SiC heterojunction has been carried out in the temperature range of 300~500 K. When the measurement temperature increased from 300 K to 500 K, the reverse current variation of annealed device is higher than as-grown device, which is related to barrier height in the ZTO/SiC interface. It is shown that annealing process is possible to control the electrical characteristics of ZTO/SiC heterojunction diode.

Phenomenal study on the dopant activation behavior in polysilicon thin films doped by non-mass separated ion mass doping technique (비질량 분리 이온 질량 주입법으로 도핑시킨 다결정 박막의 도판트 활성화 거동)

  • Yoon, Jin-Young;Choi, Duck-Kyun
    • Journal of the Korean Crystal Growth and Crystal Technology
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    • v.7 no.1
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    • pp.143-150
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    • 1997
  • The electrical properties of polysilicon thin films implanted with $B_2H_6$ diluted in $H_2$ as dopant source using ion mass doping technique and the effect of radiation damage on the dopant activation behavior were investigated. Comparing the SIMS profiles of boron in polysilicon films with that obtained from computer simulation using TRIM92 the most probable ion species were $B_2H_x\;^+$(x=1, 2, 3‥‥) type molecular ions. As a result of the Implantation of energetic massive ions, a continuous amorphized layer was created in polysilicon films where the fraction of amorphized layer varied with doping time. This amorphization comes from the fact that mass separation of implanting species is not employed in this ion mass doping technique. In the dopant activation behavior, reverse annealing phenomenon appeared in the intermediate annealing temperature range for a severely damaged specimen. The experimental result showed that the off-state current of the p-channel polysilicon thin film transistor is dependent on the degree of radiation damage.

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Identification of Differentially Regulated Genes in Bovine Blastocysts using an Annealing Control Primer System

  • Park, Sae-Young;Hwang, Kyu-Chan;Cui, Xiang-Shun;Shin, Mi-Ra;Kim, Eun-Young;Lee, Won-Don;Kim, Nam-Hyung;Park, Sepill;Lim, Jin-Ho
    • Proceedings of the KSAR Conference
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    • 2004.06a
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    • pp.229-229
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    • 2004
  • The identification of embryo-specific genes would provide insights into early embryonic development. However, the current methods employed to identify the genes that are expressed at a specific developmental stage are labor intensive and suffer from high rates of false positives. Here we employed a new and accurate reverse transcription-polymerase chain reaction (RT-PCR) technology that involves annealing control primers (ACPs) to identify the genes that are specifically or prominently expressed in bovine early blastocysts and hatched blastocysts produced in vitro. (omitted)

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Tapered Etching of Field Oxide with Various Angle using TEOS (다양한 기울기를 갖는 TEOS 필드 산화막의 경사식각)

  • 김상기;박일용;구진근;김종대
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.15 no.10
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    • pp.844-850
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    • 2002
  • Linearly graded profiles on the field area oxide are frequently used in power integrated circuits to reduce the surface electric field when power devices are operated in forward or reverse blocking modes. It is shown here that tapered windows can be made using the difference of etch rates between the bottom and the top layer of TEOS film. Annealed TEOS films are etched at a lower rate than the TEOS film without annealing Process. The fast etching layer results in window walls having slopes in the range of 25$^{\circ}$∼ 80$^{\circ}$ with respect to the wafer surface. Taper etching technique by annealing the TEOS film applies to high voltage LDMOS, which is compatible with CMOS process, due to the minimum changes in both of design rules and thermal budget.

EFFECTS OF Si, Ge PRE-IMPLANT INDUCED DEFECTS ON ELECTRICAL PROPERTIES OF P+-N JUNCTIONS DURING RAPID THERMAL ANNEALING

  • Kim. K.I.;Kwon, Y.K.;Cho, W.J.;Kuwano, H.
    • Journal of the Korean Vacuum Society
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    • v.4 no.S2
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    • pp.90-94
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    • 1995
  • Defects introduced by Si, Ge preamorphization and their effects on the dopant diffusion and electrical characteristics. Good crystalline quality are obtained after the annealing of Ge ion double implanted samples. The defect clusters under the a/c interface are expected to extend up to the deep in the Si ion implanted samples. The dislocation loops near the junction absorb the interstitial Si atoms resolving from the defect cluster and result in the prevention of enhanced boron diffusion near the tail region of boron profile and show good reverse current charactristics.

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Identification of differentially expressed genes in the developmental stages from olive flounder Paralichthys olivaceus using an annealing control primer system

  • Kim, Young-Ok;Park, Eun-Mi;Nam, Bo-Hye;Kong, Hee-Jeong;Kim, Woo-Jin;Noh, Jae-Koo;Lee, Sang-Jun;Kim, Kyung-Kil
    • Animal cells and systems
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    • v.14 no.1
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    • pp.25-30
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    • 2010
  • We employed a new and improved differential display reverse transcription-polymerase chain reaction (DDRT-PCR) method, which involves annealing control primers (ACPs), to identify the genes that are specifically or prominently expressed in olive flounder (Paralichthys olivaceus) juveniles (35 days post-hatch; dph) compared to larval-stage (dph 21) flounder. Using 60 ACPs, we identified eight differentially expressed genes (DEGs) and basic local alignment search tool (BLAST) searches revealed eight known genes. Gene expression levels were confirmed by RT-PCR. Phosphoglucose isomerase (PGI) was highly expressed at 21 dph, while nephrosin, myosin light chain (MLC), myosin heavy chain (MHC), carboxypeptidase A, chymotrypsin B, fish-egg protein, and matrix protein were expressed at 35 dph. PGI, MLC, and MHC expression was further analyzed by RT-PCR. The differentially expressed genes identified in this study may provide insights into the molecular basis of development in olive flounder.