• Title/Summary/Keyword: SOP-D

Search Result 85, Processing Time 0.021 seconds

Security performance analysis of SIMO relay systems over Composite Fading Channels

  • Sun, Jiangfeng;Bie, Hongxia;Li, Xingwang
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.14 no.6
    • /
    • pp.2649-2669
    • /
    • 2020
  • In this paper, we analyze the secrecy performance of single-input multiple-output (SIMO) relay systems over κ-μ shadowed fading channels. Based on considering relay model employing decode-and-forward (DF) protocol, two security evaluation metrics, namely, secure outage probability (SOP) and probability of strictly positive secrecy capacity (SPSC) are studied, for which closed-form analytical expressions are derived. In addition, Monte Carlo results prove the validity of the theoretical derivation. The simulation results confirm that the factors that enhance the security include large ratio of (μD, μE), (mD, mE), (LD, LE) and small ratio of (kD, kE) under the high signal-to-noise ratio regime.

Possibility of Si TFT Technology

  • Noguchi, Takashi
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2002.08a
    • /
    • pp.31-33
    • /
    • 2002
  • Si TFTs are applied not only to stacked SRAM but also to FPD. Improvement of device characteristic such as an enhancement of carrier mobility or a reduction of leakage current is studied intensively. The TFT technology is developing based on conventional Si LSI technology. By establishing a stable fabrication process on flexible substrate and high performance characteristic uniformly and reliably, TFT technology has a possibility to develop to SOP or other highly functional applications similar to or beyond the conventional Si LSI in the era of information and telecommunication.

  • PDF

A Simple One-pass Variable Rate Control Method for Fixed-Size Storage Systems

  • Kyungheon Noh;Jeong, Seh-Woong;Park, Jeahong;Byeungwoo Jeon
    • Proceedings of the IEEK Conference
    • /
    • 2002.07a
    • /
    • pp.289-292
    • /
    • 2002
  • This paper provides a frame-layer method for controlling bit rate of compressed video data in real time. Our approach is easy to operate and can store encoded video data in real time without deteriorating the quality of an image. To provide ameliorated and consistent visual quality, a new concept named SOP (Set Of Pictures) and a new quantization parameter variation control algorithm based on a second-order rate-distortion model 〔2〕 are introduced. The total bit-budget is allocated efficiently to cope with unpredictable recording time by using the proposed algorithm and it is distributed to each frame. In the end, we show improved and consistent video quality with experimental results obtained from C-model of a MPEG-4 (simple-profile) encoder.

  • PDF

Notes on Korean Agaricales (II) (한국산(韓國産) 주름버섯 목(目)에 대한 보고(報告))

  • Kim, Yang-Sop;Park, Yong-Hwan;Shin, Kwan-Chull
    • The Korean Journal of Mycology
    • /
    • v.6 no.2
    • /
    • pp.37-42
    • /
    • 1978
  • Seven species of higher fungi which were collected at Kwangneung, Mt. Hanla, Mt. Chiri, Taeqwanryung, and Yeongdong district, and preserved in the institute from 1975 to 1977, were classified into new korean species. Also, two species of fungi were collected from April to October 1978 and identified at Suweon, Kwangneung, and Mt. Chiri. They were as follows: Hygrophorus pratensis, H. flavescens, H. puniceus, Rhodophyllus rhodopolious Lepiota atrosquamulosa, Leucocoprinus fragilissima Lyophyllum semitale, Russula delica and Xerocomus badius.

  • PDF

Determination of Design Criteria Using 3D Solder Joint Configuration in SMT (표면실장기술에 있어 설계기준결정에 관한 연구)

  • 김성관;최동필;유중돈
    • Proceedings of the KWS Conference
    • /
    • 1995.10a
    • /
    • pp.145-148
    • /
    • 1995
  • To provide better understanding of a solder joint design criteria, mathematical models have been developed to calculate the shape of the solder fillets formed between the pad and lead. The effects of parameters such as solder volume and pad dimensions are described with this model. In this study, a systematic way to determine the design criteria of the SMT from the predicted 3D solder joint profile is proposed. The solder joint profile is calculated using the available 3D FEM code which minimizes the system energy due to the surface tension and gravity. The solder joint profiles of gullwing-type lead such as QFP and SOP are calculated for design parameters, and acceptable ranges are obtained. The result shows that the pad length is the most significant factor compared with the pad width and pad area.

  • PDF

Analysis of Salmonella Pathogenicity Island 1 Expression in Response to the Changes of Osmolarity

  • LIM, SANG-YONG;YONG, KYEONG-HWA;RYU, SANG-RYEOL
    • Journal of Microbiology and Biotechnology
    • /
    • v.15 no.1
    • /
    • pp.175-182
    • /
    • 2005
  • Abstract Salmonella pathogenicity island 1 (SPI1) gene expression is regulated by many environmental signals such as oxygen, osmolarity, and pH. Here, we examined changes in the expression level of various regulatory proteins encoded within SPI1 in response to three different concentrations of NaCl, using primer extension analysis. Transcription of all the regulatory genes tested was activated most when Salmonella were grown in Luria Broth (LB) containing 0.17 M NaCl. The expression of hilA, invF, and hilD was decreased in the presence of 0.47 M NaCl or in the absence of NaCl, while hilC expression was almost constant regardless of the NaCl concentration when Salmonella were grown to exponential phase under low-oxygen condition. The reduced expression of hilA, invF, and hilD resulted in lower invasion of hilC mutant to the cultured animal cells when the mutant was grown in the presence of 0.47 M NaCl or in the absence of NaCl prior to infection. Among the proteins secreted via the SPI1-type III secretion system (TTSS), the level of sopE2 expression was not influenced by medium osmolarity. Various effects of osmolarity on virulence gene regulation observed in this study is one example of multiple regulatory pathways used by Salmonella to cause infection.

A Study on the Emergency Response Procedure of Unmanned Light Rail Transit (LRT) against Fire Accident (화재 사고에 대비한 무인 경전철의 비상대응절차에 관한 연구)

  • Kim, Yeon Kyu
    • KSCE Journal of Civil and Environmental Engineering Research
    • /
    • v.32 no.2D
    • /
    • pp.183-187
    • /
    • 2012
  • This study is to prepare the emergency response procedures for an unmanned LRT (Light Rapid Transit) which is being commercially operated recently. This emergency response procedure adds several particular characteristics which happens in the hardware and software aspects at the unmanned LRT in addition to the present emergency response procedures. The emergency response procedure has to conform to the emergency response planning. For doing that this emergency response procedure includes three important sub systems. First of all, the functional emergency response system has been developed. Secondly, Standard Operation Procedure (SOP) is suggested for the better and faster emergency response between emergency response personnel and institutes. Thirdly, emergency response training and drilling system is also provided for emergency response personnel. Finally, a software program for emergency response training and drilling will be developed and suggested to be used for the emergency response personnel.

Determination of Adequate Solder Volume using 3D Solder Joint Configuration in SMT (3차원 납 접합부 형상을 이용한 표면실장기술의 적정 납량 결정)

  • 최동필;김성관;유중돈
    • Journal of Welding and Joining
    • /
    • v.14 no.2
    • /
    • pp.71-78
    • /
    • 1996
  • In order to rpovide proper SMT design criteria in a systematic way, a mathematical formulation has been developed to predict the configuration of the solder fillet formed between the gullwing type lead and rectangular pad. Effects of SMT design parameters such as the solder volume and pad dimension on the solder profile are investigated using the FEM that calculates the 3D configuration by minimizing the energy due to surface tension and gravity in the equilibrium state. Design criteria of QFP and SOP are illustrated by plotting the acceptable range of the solder volume with respect to the length and width ratios of the pad and lead. The results show that the acceptable design range increases with increase in the pad length and width. The pad length has more significant effects on design criteria compared with the pad width, and Bond number can be utilized to predict the joint quality.

  • PDF

Influence of Input Parameters on Shock Wave Propagation in Quasi-3D Hydrodynamic Model (준3차원 동수역학 모형의 입력변수가 충격파 전파에 미치는 영향)

  • Rhee, Dong Sop;Kim, Hyung-Jun;Song, Chang Geun
    • Journal of the Korean Society of Safety
    • /
    • v.32 no.2
    • /
    • pp.112-116
    • /
    • 2017
  • Present study investigated the influence of time step size, turbulent eddy viscosity, and the number of layer on rapid and unsteady propagation of dam break flow. When the time step size had a value such that it resulted in Cr of 0.89, a significant numerical oscillation was observed in the vicinity of the wave front. Higher turbulent viscosity ensured smooth and mild slope of velocity and water stage compared with the flow behavior by no viscosity. The vertical velocity at the lower layer positioned near the bottom showed lower velocity compared with other layers.

High-Gain Wideband CMOS Low Noise Amplifier with Two-Stage Cascode and Simplified Chebyshev Filter

  • Kim, Sung-Soo;Lee, Young-Sop;Yun, Tae-Yeoul
    • ETRI Journal
    • /
    • v.29 no.5
    • /
    • pp.670-672
    • /
    • 2007
  • An ultra-wideband low-noise amplifier is proposed with operation up to 8.2 GHz. The amplifier is fabricated with a 0.18-${\mu}m$ CMOS process and adopts a two-stage cascode architecture and a simplified Chebyshev filter for high gain, wide band, input-impedance matching, and low noise. The gain of 19.2 dB and minimum noise figure of 3.3 dB are measured over 3.4 to 8.2 GHz while consuming 17.3 mW of power. The Proposed UWB LNA achieves a measured power-gain bandwidth product of 399.4 GHz.

  • PDF