• Title/Summary/Keyword: Time response

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Analysis of Web Response Time on Queue Managements and Transmission Latency in Congested Network (혼잡 망에서의 큐 제어 방식과 전송지연시간에 대한 웹 반응 시간 분석)

  • Seok, Woo-Jin
    • The KIPS Transactions:PartC
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    • v.15C no.4
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    • pp.321-328
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    • 2008
  • In this paper, we analyze web response time depending on queue managements and transmission latencies in highly congested network situation. Under FIFO scheme, the response times are for three different sizes of queue are almost the same, but the response time increases as traffic intensity increases. The performance between different queue sizes shows more different in 90% and 98% traffic intensity than in 80% traffic intensity. Especially the difference becomes bigger in short latency case than long latency case. Under RED scheme, three differently tunned RED schemes do not impact on the response time when the size of queue is relatively large. When the queue size becomes smaller, the response time of the differently tunned RED schemes becomes different for short latency case while the response times are almost same for long latency case. When comparing FIFO and RED schemes under same size of queue, RED scheme shows less response time than that of FIFO for the long latency case in high traffic intensity.

An Analysis of Working Hours by Type of Sprinkler Head Used at Indoor Gymnasiums

  • Ahn, Jae-Cheon;Kong, Ha-Sung
    • International journal of advanced smart convergence
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    • v.10 no.4
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    • pp.117-123
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    • 2021
  • This study aims to analyze working hours of sprinkler heads when a fire occurs at an indoor gymnasium while sprinkler heads are installed in division of standard response type, special response type, and earlier response type. The fire scenario was designed under the assumption that the fire started from overheating of a heater in the indoor gymnasium has transferred on to a couch to spread. The analysis on the operation time of the standard response type sprinkler head, the special response type sprinkler head and the early response sprinkler head was conducted. The result showed that, in case of fire in a gymnasium, the time for opening of the heat sensor due to the heat from the fire varies by the type of the sprinkler head. When a special response type sprinkler is installed, it worked below the assessment standards. When an early response sprinkler head is installed, it worked appropriately according to assessment standards. Based on the results, we found that sprinkler heads will work properly when installed according to design relevant to laws and regulations. This means that there is a limit in installation of sprinkler heads based on the existing law-based design as for indoor gymnasiums. Again, we conclude that if sprinkler heads are installed based on design made through laws and regulations, more time will be needed for operation, making it highly likely to fail to stop a fire at an earlier point of time.

A study on nonlinear seismic response analysis of building considering frequency dependent soil impedance in time domain

  • Nakamura, Naohiro
    • Interaction and multiscale mechanics
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    • v.2 no.1
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    • pp.91-107
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    • 2009
  • In order to accurately estimate the seismic behavior of buildings, it is important to consider both nonlinear characteristics of the buildings and the frequency dependency of the soil impedance. Therefore, transform methods of the soil impedance in the frequency domain to the impulse response in the time domain are needed because the nonlinear analysis can not be carried out in the frequency domain. The author has proposed practical transform methods. In this paper, seismic response analyses considering frequency dependent soil impedance in the time domain are shown. First, the formulation of the proposed transform methods is described. Then, the linear and nonlinear earthquake response analyses of a building on 2-layered soil were carried out using the transformed impulse responses. Through these analyses, the validity and efficiency of the methods were confirmed.

Response Characteristics of Fast TN Cell on a Polyimide Surface (폴리이미드 표면에서의 고속 TN 셀의 응답 특성)

  • Jeon, Yong-Je;Hwang, Jeong-Yeon;Jeong, Youn-Hak;Seo, Dae-Shik
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.11a
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    • pp.514-517
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    • 2002
  • We investigated response characteristics of twisted nematic (TN) cell with different nematic liquid crystals (NLCs) and cell gap d on a rubbed polyimide (PI) surface. High transmittance and fast response time of the TN cell on the rubbed PI surface were achieved by using high birefringence (${\Delta}n$) and low cell gap d. The response time of TN cell on the rubbed PI surface was measured 5.1 ms. The transmittance and response time of the TN cell on the rubbed PI surface decreased with decreasing ${\Delta}nd$.

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A Study on Response Characteristics of TN Cell on a Polyimide Surface (폴리이미드 표면에서의 TN 셀의 응답 특성에 관한 연구)

  • 황정연;전용제;정연학;서대식
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.15 no.9
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    • pp.808-811
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    • 2002
  • We investigated response characteristics of twisted nematic (TN) cell with different nematic liquid crystals (NLCs) and cell gap d on a rubbed polyimide (PI) surface. High transmittance and fast response time of the TN cell on the rubbed PI surface were achieved by using high birefringence (Δn) and low cell gap d. The response time of TN cell on the rubbed PI surface was measured 5.1 ms. The transmittance and response time of the TN cell on the rubbed PI surface decreased with decreasing Δnd.

Fast Response Characteristics in Liquid Crystal Display in the High birefringence nematic liquid crystal (고굴절 네마틱 액정에서의 액정 디스플레이의 고속응답 특성)

  • Kim, Jong-Hwan;Hwang, Jeoung-Yeon;Seo, Dae-Shik
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2003.11a
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    • pp.498-501
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    • 2003
  • We investigated response characteristics of twisted nematic (TN) cell with different nematic liquid crystals (NLCs) and cell gap d on a rubbed polyimide (PI) surface. High transmittance and fast response time of the TN cell on the rubbed PI surface were achieved by using high birefringence (${\Delta}n$) and low cell gap d. The transmittance and response time of the TN cell on the rubbed PI surface decreased with decreasing ${\Delta}nd$. The fast response time of TN cell using high birefringence with ${\Delta}nd=0.363$ on the rubbed PI surface was measured 5.1 ms.

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In-plane Switching Liquid Crystal Cell with a Mixed Bent Electrode Structure for Fast Response Time

  • Ko, Tae-Woon;Kim, Jae-Chang;Lee, Joun-Ho;Choi, Hyun-Chul;Ji, Seung-Hoon;Choi, Jung-Min;Lee, Chul-Hun;Lee, Gi-Dong
    • Journal of Information Display
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    • v.9 no.3
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    • pp.12-15
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    • 2008
  • A bent electrode structure is proposed in the super in-plane switching (S-IPS) liquid crystal (LC), as it can reduce the response time without loss of transmittance in the bright state. The electrode angle in each position of the bent electrode was optimized to simultaneously achieve high transmittance and fast response time. The electro-optical characteristics of the proposed LC cell structure were experimentally compared with those of the conventional cell. It was observed that the response time became over 8% shorter without loss of transmittance when the proposed bent structure was applied.

Novel Driving Method for fast Response Time in Vertical Alignment LCDs

  • Song, Jang-Kun;Jun, Man-Bok;Park, Bo-Yoon;Seomun, San-Seong;Lee, Kye-Hun;Choi, Kwang-Soo;Kim, Sang-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2004.08a
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    • pp.205-208
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    • 2004
  • The switching mechanism of multi-domain vertical alignment mode LCD and delayed on response time phenomenon in special conditions are investigated. A modified DCC (Dynamic Capacitance Compensation), DCCII has been developed for the fast response time performance in PVA TFT-LCD TVs. DCCII applies a pre-tilt voltage to addressed pixels during the previous frame in addition to an overshoot voltage. In result, the response time less than 8 msec, has been obtained for all moving images through the DCCII technique.

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A study on the designing f private networks considering response time under packet switching network environment (패킷교환망 환경하에서 응답시간을 고려한 사설망 설계에 관한 연구)

  • 이영찬;민재형
    • Proceedings of the Korean Operations and Management Science Society Conference
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    • 1996.10a
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    • pp.157-161
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    • 1996
  • This paper presents a method for designing private networks considering response time under packet switching network environment Specifically, we propose the designing process of a private network, where the host is assumed to be synchronous and the terminals to be asynchronous, according to protocol and access lines. To calculate the response time for the networks, we use the mutual independent M/M/1 and M/W/s queueing models. Comparing the response time derived from the model with the actual one, it is found that the model yields almost same performance in a more economic way. From the experiment, it is suggested that the necessary number of lines as well as the response time for a specific network can be estimated properly by sensitivity analysis.

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A Decreasing Methodology of User Response Time - Mainly Focused On SAP R/3 System (튜닝을 통한 User Response Time 감소 기법 - SAP R/3 ERP System 을 중심으로)

  • Lee, Jung-Jae;Song, Gwann-Ho;Choi, Jin-Young
    • Proceedings of the Korea Information Processing Society Conference
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    • 2007.05a
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    • pp.625-628
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    • 2007
  • 갈수록 복잡화, 대량화되고 있는 시스템의 성능은 유지하면서 User Response Time 을 단축시키는 Tuning 은 투자 대비 이익률(ROI : Return On Investment)에 탁월한 효과를 가져온다는 점에서 중요시 되고 있다. 본 연구는 SAP R/3 System 환경에서 Tuning 통한 User Response Time 감소를 위하여 Query 분석 및 Table Index 생성, Program Logic 수정, Parallel Processing, SAP R/3 System 의 고유 기능인 Notes 적용을 통한 User Response Time 감소 기법을 제시한다.

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