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Optimization of ARIA Block-Cipher Algorithm for Embedded Systems with 16-bits Processors

  • Lee, Wan Yeon;Choi, Yun-Seok
    • International Journal of Internet, Broadcasting and Communication
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    • v.8 no.1
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    • pp.42-52
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    • 2016
  • In this paper, we propose the 16-bits optimization design of the ARIA block-cipher algorithm for embedded systems with 16-bits processors. The proposed design adopts 16-bits XOR operations and rotated shift operations as many as possible. Also, the proposed design extends 8-bits array variables into 16-bits array variables for faster chained matrix multiplication. In evaluation experiments, our design is compared to the previous 32-bits optimized design and 8-bits optimized design. Our 16-bits optimized design yields about 20% faster execution speed and about 28% smaller footprint than 32-bits optimized code. Also, our design yields about 91% faster execution speed with larger footprint than 8-bits optimized code.

A Study on the Melanin Synthesis Inhibition and Whitening Effect of Schizandrae Fructus (오미자(五味子)의 멜라닌 생성 억제와 미백효과에 관한 연구)

  • Doo, In-Sun;Lim, Kyu-Sang;Hwang, Chung-Yeon;Park, Min-Cheol;Kim, Nam-Kwen
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.20 no.3
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    • pp.51-62
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    • 2007
  • Objective : The aim of this study is to assess the effect of Schizandrae Fructus on melanin synthesis inhibition and whitening effect. Methods : We assessed inhibitory effects of Schizandrae Fructus on melanin-release from B16F10, on melanin production in B16F10, on mushroom tyrosinase activity in vitro, on tyrosinase activity in B16F10 and effect of Schizandrae Fructus on the expression tyrosinase, TRP-1, TRP-2, PKA, ERK-1 ERK-2, AKT-1, MITF in B16F10. Results and Conclusion : 1. Schizandrae Fructus inhibited melanin-release, melanin production in B16F10. 2. Schizandrae Fructus inhibited tyrosinase activity in vitro and in B16F10. 3. Schizandrae Fructus suppressed the expression of tyrosinase, TRP-1, TRP-2, PKA, ERK-2 in B16F10.

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IEEE 802.16m 표준화/기술 동향

  • Kim, Tae-Yeong;Son, Jung-Je;Park, Jeong-Ho;Jo, Jae-Won
    • The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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    • v.21 no.2
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    • pp.24-34
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    • 2010
  • 본 고에서는 IEEE 802.16m 표준 및 기술 동향에 대해서 개관한다. 현재 상용화된 IEEE 802.16e 시스템에서 진화된 IEEE 802.16m 시스템은 IMT-2000을 대체할 차세대 이동 통신 시스템을 목표로 한다. 이런 요구 사항을 만족시키기 위해 우선 IEEE 802.16m 시스템은 IEEE 802.16e 시스템과의 호환성이 유지되어야 하며, 차세대 통신 시스템 표준으로 추진 중인 IMT-Advanced 시스템의 성능 요구사항을 만족시켜야 한다. 이와 같은 목표 달성을 위해 물리 계층 및 MAC 계층에서 다양한 기술들이 고려되었고, 본 고에서 전반적인 기술들에 대해서 간략히 살펴보도록 한다. 더불어, ITU-R에 제출한 IMT-Advanced 제안서의 결과를 토대로 IEEE 802.16m 시스템의 성능을 살펴보도록 한다.

Properties of FET using Activative Materials with F16CuPc (F16CuPc를 활성층으로 사용한 FET의 특성 연구)

  • Lee, Ho-Shik;Park, Young-Pil
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2009.04b
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    • pp.43-44
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    • 2009
  • We fabricated organic field-effect transistors (OFETs) based a fluorinated copper phthalocyanine ($F_{16}CuPc$) as an active layer. And we observed the surface morphology of the $F_{16}CuPc$ thin film. The $F_{16}CuPc$ thin film thickness was 40nm, and the channel length was $50{\mu}m$, channel width was 3mm. We observed the typical current-voltage (I-V) characteristics and capacitance-voltage (C-V) in $F_{16}CuPc$ FET and we calculated the effective mobility.

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Screening and effect of antagonists for biological control of plant pathogen (모잘록병의 생물학적 방제를 위한 유효 미생물 선발방법 및 효과)

  • Lee, Baek-Seok;Choe, Seong-Won;Choe, Gi-Hyeon;Lee, Jae-Ho;Kim, Eun-Gi
    • 한국생물공학회:학술대회논문집
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    • 2002.04a
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    • pp.386-389
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    • 2002
  • Antagonistic Bacillus sp. #16 to phytopathogenic fungi were selected based on the growth rate, inhibition rate and surface tension reduction. Based on the 16S rRNA sequences, Bacillus sp. #16 is closely related to the B. subtilis DSM10. In the pot test, Bacillus sp. #16 show the most effective growth inhibition against damping-off disease of cucumber seeding.

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Prenatally Diagnosed Rare Trisomy 16 Mosaicism in Human Amniotic Fluid Cells in the Second Trimester: A Case Report

  • Kim, Sook Ryung;Choi, Eun Jung;Kim, Young Joo;Kim, Tae Yoon;Lee, Young Jin
    • Development and Reproduction
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    • v.22 no.2
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    • pp.199-203
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    • 2018
  • Although trisomy 16 is commonly detected in spontaneous abortions and accounts for over 30% of cases of autosomal trisomy detected after spontaneous abortion, trisomy 16 mosaicism is rarely detected by amniocentesis in the second trimester. Here, we report a case of level III trisomy 16 mosaicism (47,XX,+16[8]/46,XX[31]) diagnosed by cytogenetic analysis of independently cultured amniotic fluid cells. The female baby was delivered at full term with low birth weight and intrauterine growth retardation, and interestingly, her karyotype was normal (46,XX). Given the difficulty in predicting the outcomes of fetuses with this mosaicism, it is recommended to inform the possibility of mosaicisms including this trisomy 16 mosaicism during prenatal genetic diagnosis and genetic counseling for parents.

Physiological Characteristics and Ethanol Fermentation of Thermotolerant Yeast Saccharomyces cerevisiae OE-16 from Traditional Meju (메주에서 분리한 고온성 효모 Sccharomyces cerevisiae OE-16 의 생리적 특성과 알코올발효)

  • 김나미
    • The Korean Journal of Food And Nutrition
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    • v.12 no.5
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    • pp.490-495
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    • 1999
  • A thermotolerant yeast Saccharomyces cerevisiae OE-16 was isolated from traditional Meju was investigated on their physiological characteristics and ethanol fermentation ability. Saccharomyces cerevisiae OE-16 were able to grow up to 45$^{\circ}C$ and 40% of glucose. Saccharomyces cerevisiae OE-16 was also resistant to 15% of KCl 1,200ppm of Pb2+, Hg2+ and 500ppm of potassium sorbate. From 20% glucose media Saccharomyces cerevisiae OE-16 produced 83.4g per liter of ethanol at 3$0^{\circ}C$ and 9.5g per liter of ethanol at 4$0^{\circ}C$ for 72 hours.

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Electrical Properties of FET using F16CuPc (F16CuPc를 이용한 FET의 전기적 특성 연구)

  • Lee, Ho-Shik;Park, Young-Pil
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2008.06a
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    • pp.504-505
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    • 2008
  • We fabricated organic field-effect transistors (OFETs) based a fluorinated copper phthalocyanine ($F_{16}CuPc$) as an active layer. And we observed the surface morphology of the $F_{16}CuPc$ thin film. The $F_{16}CuPc$ thin film thickness was 40nm, and the channel length was $50{\mu}m$, channel width was 3mm. We observed the typical current-voltage (I-V) characteristics and capacitance-voltage (C-V) in $F_{16}CuPc$ FET and we calculated the effective mobility.

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Effect of Chitosan Oligosaccharide on Melanin Production in B16 Melanoma Cells (B16 Melanoma 세포에서 Chitosan Oligosaccharide가 Melanin 생성에 미치는 영향)

  • 조남영;윤미연;김경원;박영미;임혜원;이지윤;이진희;김연정;김창종
    • YAKHAK HOEJI
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    • v.47 no.6
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    • pp.404-409
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    • 2003
  • To investigate the effect of chitosan oligosaccharide on melanin synthesis, we measured tyrosinase activity and melanin production in B16 melanoma cells. Chitosan oligosacchaide itself did not have any anti-oxidant activity in DPPH radical scavenging, and did not affect the proliferation of B16 melanoma cells. Chitosan oligosaccharide dose-dependently increased melanin production in the absence or presence of MSH. However, chitosan oligosaccharide did not have any influence on the tyrosinase activity and tyrosinase expression in B16 melanoma cells. These results suggest that chitosan oligosaccharide-induced melanin production may be independent on tyrosinase activity in B16 melanoma cells. From the above results. chitosan oligosaccharide dose-dependently appears to increase melanin production in B16 melanoma cells, suggesting that chitosan oligosaccharide may be used as a tanning agent.

A Study on Fast Handover Scheme in the Wireless Internet Service Network Based on IEEE 802.16e (IEEE 802.16e 기반무선 인터넷서비스 망에서의 고속 핸드오버 방안에 관한 연구)

  • Yang, Hyun-Ho;Cha, Jae-Sun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.11 no.10
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    • pp.1950-1956
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    • 2007
  • IEEE 802.16e has many points to be improved. Among them, fast handover is essential when user moves in high speed. In this paper we proposed a fast handover scheme using handover candidate BS set. This scheme is based on IEEE 802.16e, however according to the performance evaluation results through simulation; our proposed scheme shows more than 30% of handover delay reduction and at least 5% of handover drop probability improvement.