• Title/Summary/Keyword: time-response

Search Result 11,750, Processing Time 0.037 seconds

The improvement of GTG response time using new concept LC mixture in S-IPS Mode for high frame frequency technologies

  • Kim, D.K.;Lim, C.S.;Lee, D.J.;Hwang, J.I.;Jung, H.G.;Lee, S.W.;Oh, C.H.;Kang, I.B.;Jin, Min-Ok;Jin, Heui-Seok;Lee, Seung-Eun;Jacob, Thomas;Czanta, Markus;Tarumi, Kazuaki
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2006.08a
    • /
    • pp.864-867
    • /
    • 2006
  • In order to satisfy with the clear visibility without any difficulties such as blurring and tailing, the high refreshing rate technology and fast response time of LC itself were applied to TFT-LCDs. In proportion to the decrease of holding time of 1 frame, the fast transition of LC behavior was necessary to both maintain the luminance and minimize the tailing appearance. The introduction of a new LC mixture for faster response times was realized by the good combination of newly introduced dielectrically neutral LC material so called 'Super Low Viscosity' (SLV) and highly polar $CF_2O-linkage$ LC material. This resulted in about a 20% reduction in the ${\gamma}_1$ of the new LC mixture compared to the references. In accordance with a new LC mixture with low ${\gamma}_1$, fast response time of 5ms has been made for S-IPS LCD TV application. Consequently, by applying the high frame frequency of 120Hz driving alongside the 5ms response time characteristics, the MPRT value was reduced by half.

  • PDF

Development of Fast Response Time (16msec) in IPS Mode

  • Lim, C.S.;Lee, J.H.;Oh, C.H.;Choi, H.C.;Lee, Seung-Eun;Jin, Min-Ok;Klasen-Memmer, M.;Tarumi, K.
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 2003.07a
    • /
    • pp.68-71
    • /
    • 2003
  • To be able to show moving images without visual problems like blurring and tailing, the response time of liquid crystal display (LCDs) must be improved. In this paper we will discuss our progress in improving the response time by optimizing the cell configuration and the use of new liquid crystal mixtures. A 20.1inch diagonal UXGA IPS TFT-LCD has been developed having a response time as fast as l-frame time (16msec) for white-black operation and less than 16msec in all gray levels without applying ODC (Over Driving Circuit). This is very important because one of the technology to reduce motion blurring, the use of scanning backlight is conditioned by 16msec for all grays. The excellent gray-to-gray response can be explained by virtue of fundamental characteristics of S-IPS mode and makes a good contrast with the results of VA mode.

  • PDF

Spatiotemporal Routing Analysis for Emergency Response in Indoor Space

  • Lee, Jiyeong;Kwan, Mei-Po
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
    • /
    • v.32 no.6
    • /
    • pp.637-650
    • /
    • 2014
  • Geospatial research on emergency response in multi-level micro-spatial environments (e.g., multi-story buildings) that aims at understanding and analyzing human movements at the micro level has increased considerably since 9/11. Past research has shown that reducing the time rescuers needed to reach a disaster site within a building (e.g., a particular room) can have a significant impact on evacuation and rescue outcomes in this kind of disaster situations. With the purpose developing emergency response systems that are capable of using complex real-time geospatial information to generate fast-changing scenarios, this study develops a Spatiotemporal Optimal Route Algorithm (SORA) for guiding rescuers to move quickly from various entrances of a building to the disaster site (room) within the building. It identifies the optimal route and building evacuation bottlenecks within the network in real-time emergency situations. It is integrated with a Ubiquitous Sensor Network (USN) based tracking system in order to monitor dynamic geospatial entities, including the dynamic capacities and flow rates of hallways per time period. Because of the limited scope of this study, the simulated data were used to implement the SORA and evaluate its effectiveness for performing 3D topological analysis. The study shows that capabilities to take into account detailed dynamic geospatial data about emergency situations, including changes in evacuation status over time, are essential for emergency response systems.

TRANSIENT PERFORMANCE OF AN SI ENGINE BY TRANSIENT RESPONSE SPECIFICATIONS

  • Kwark, J.H.;Jeon, C.H.;Chang, Y.J.
    • International Journal of Automotive Technology
    • /
    • v.4 no.3
    • /
    • pp.109-117
    • /
    • 2003
  • The analysis and evaluation of the transient performance by the transient response specifications under various acceleration speeds and types based on driver's typical acceleration habit are implemented by the experimental study to provide the appropriate direction for the transient control in a gasoline engine. The concept of the transient response specifications which consist of delay time, rising time, maximum overshoot and settling time, and the analysis method using them are introduced to evaluate the characteristics of the transient performance quantitatively. Furthermore four acceleration speeds and four acceleration types are set respectively to realize the various transient states which are similar to the real drive. Several performance parameters in terms of engine speed, manifold absolute pressure, fuel injection duration and air excess ratio are measured simultaneously during the various acceleration using a throttle actuator controlled by a PC. The transient response specifications characterized well the transient performance for the various acceleration speed and types quantitatively. Delay and rising time with increment of the acceleration speed became shorter, but settling time did longer. Intensified acceleration type appeared to be the most economical in view of fuel consumption, and linear acceleration type was found to have the least harmful emission concentration.

System Infrastructure of Efficient Web Cluster System to Decrease the Response Time using the Load Distribution Algorithm (부하분산 알고리즘을 적용하여 반응시간을 감소시키는 웹 클러스터 시스템 구축)

  • Kim Seok-chan;Rhee Young
    • Journal of KIISE:Computing Practices and Letters
    • /
    • v.10 no.6
    • /
    • pp.507-513
    • /
    • 2004
  • In this paper, we consider the methodology of efficient resource usage, specially web clustering system. We develope an algorithm that distributes the load on the web cluster system to use the system resources, such as system memory equally. The response time is chosen as a performance measure on the various clustering models. And based on the concurrent user to the web cluster system, the response time is also examined as the number of users increases. Simulation experience with this algorithm shows that the response time seems to have a good results compare to those with the other algorithm. And, also the effectiveness of clustered system becomes better as long as the number of concurrent user increases. The usage of developed algorithm is more useful when the system consists of many different sub-systems, a heterogeneous clustering system.

Speed Control of D.C Motor based on Deadbeat Response (직류 전동기의 유한 시간 정정 응답 제어)

  • Kim, Young-Seok;You, Wan-Sik
    • Proceedings of the KIEE Conference
    • /
    • 1990.11a
    • /
    • pp.371-374
    • /
    • 1990
  • This paper presents the speed control of dc motor based on deadbeat response. The deadbeat response is that the output reaches the final value in the minimum possible settling time and stays there. This results demonstrate that the output reaches final value in one sampling time for the unsaturated region, and in one sampling time after getting free from the saturation state for the saturated region.

  • PDF

A Simulated Distributed Database System for Response Time Evaluation (응답시간평가를 위한 분산데이터베이스 시뮬레이션시스템)

  • Rho, Sang-Kyu
    • Asia pacific journal of information systems
    • /
    • v.7 no.3
    • /
    • pp.23-37
    • /
    • 1997
  • Although numerous models and solution algorithms to design efficient distributed databases have been developed, very few have been validated for their effectiveness. In this paper, we develop a simulation system which can be used to analyze and validate the average response time of distributed database designs. Our simulation system models comprehensive query processing strategies such as semijoin as well as a concurrency control mechanism We analyze and validate an average response time distributed database design model using our simulation system.

  • PDF

Effect of Photo-darkening on the Response Time of PbSe Quantum-dots Doped Optical Fiber

  • Watekar, Pramod R.;Lin, Aoxiang;Ju, Seong-Min;Han, Won-Taek
    • Proceedings of the Optical Society of Korea Conference
    • /
    • 2008.02a
    • /
    • pp.251-252
    • /
    • 2008
  • We fabricated silica glass optical fiber containing PbSe quantum-dots (QD) of average size 3.2 nm. The response time of the PbSe-QD doped optical fiber was measured to be around 200 ps. However, after exposure to 1064 nm laser emission for 15 minutes, the response time dramatically reduced to around 2.5 ps, which may be due to photo-darkening effect.

  • PDF

User Experience Assisted Energy-Efficient Software Design for Mobile Devices on the big.LITTLE Core Architecture (사용자 경험을 기반으로 big.LITTLE 멀티코어 구조의 스마트 모바일 단말의 에너지 소비를 최적화 하는 소프트웨어 구조 설계)

  • Lim, Sung-Hwa
    • Journal of the Semiconductor & Display Technology
    • /
    • v.19 no.1
    • /
    • pp.23-28
    • /
    • 2020
  • In Smart mobile devices embedding big.LITTLE architectures, the conventional multi-core assignment scheme for user applications may incur wasteful energy consumption and long response time. In this paper, we propose a user experience assisted energy-efficient multicore assignment scheme. Our simulation results show that the proposed scheme achieves at 40% less energy consumption and at 20% less response time comparing to the legacy scheme.

Effect of the Properties of Sound Source and Transmission for the Evaluation of Subjective Response by the Exposure Time of Transportation Noise (교통소음의 노출시간에 따른 주관반응 평가시 음원 및 전달 특성의 효과 분석)

  • Kim, Sun-Woo;Kim, Won-Sik;Song, Guk-Gon;Kang, Jong-Ku;Park, Hyeon-Ku
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.22 no.3
    • /
    • pp.264-274
    • /
    • 2012
  • Evaluation on the environmental noise is carried out by surveying subjective response of residents with physical measurement of noise during long period in field. Particularly field survey is used to make regulations from the analysis on how many people are annoyed for specific noise level, and laboratory test used to analyze the relationship between physical parameters of noise and subjective responses. In the laboratory controlling the variables is easy but the results could be biased because the condition in room would be different with field. Most of all noise exposure time is considered to be different with real situation, and this study aimed to evaluate the subjective response by exposure time of transportation noise, by applying three kinds of variable how much they give effects on the annoyance as the exposure time is operating condition, windows type and sound level. As a result there was somewhat difference between operating type and annoyance, which is caused by the sound characteristics operated in different condition. However the window type didn't give much effect to the annoyance as much as sound type. This means that the subjective response could give similar result by exposure time even for different window types. Most of all, the main factor affecting subjective response is considered to be the sound level and the exposure time.