• Title/Summary/Keyword: L2 Trigger

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Perfomance Evaluation of efficent handover Latency Using MIH Services in MIPv4 (MIH를 이용한 효율적인 MIPv4망의 구성에 관한 연구)

  • Kim, Ki-Yong;Jang, Jong-Wook
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2007.10a
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    • pp.75-78
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    • 2007
  • Mobile IP provides hand-held devices with mobility which allows the user to do work over the network. However, handover time due transfer between access routers causes network delays and data loss. L2Trigger Handover expects this handover to take place, and executes L3 handover before L2 handover takes place, thereby reducing overall handover latency, although it still is an issue since handover latency between AR is not completely eliminated in L2 trigger handover. In this paper took into consideration where MIH is used in MIPv4 and using MIH Table when handover is about to occur in MN(Mobile Node), thereby pre-fetching data needed by Handover. In this way, when the handover is estimated, it improves the init time that L2trigger had. Furthermore we can find that we can execute the handover with shorten init time in smaller and narrow overlap length

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Korean Medicine Treatment Accompaning Myofascial Trigger-Point Accupuncture for Lower Urinary Tract Symptoms after Radical Prostatectomy : A Case Report (근치적 전립선 절제술 후 발생한 하부요로증상의 근막 트리거 포인트 침치료를 병행한 한의치료 1례)

  • Lee Jin Kwang
    • The Journal of Korean Medicine
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    • v.45 no.1
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    • pp.240-250
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    • 2024
  • Objectives: The purpose of this study is to report a case of Korean medicine treatment accompaning myofascial trigger-point accupuncture for severe & persistent lower urinary tract symptoms after radical prostatectomy. Materials and Methods: A prostate cancer patient with severe & persistent lower urinary tract symptoms after radical prostatectomy conducted 26 months ago, was treated with Korean medicine accompaning myofascial trigger-point accupuncture. The International Prostate Symptom Score(IPSS), the IPSS Quality of Life(IPSS-QoL) and the Overactive Bladder Symptom Score(OABSS) questionaires were administered to evaluate the effect of treatment for lower urinary tract symptoms. Results: After 5 month treatment with Korean medicine accompaning myofascial trigger-point accupuncture, IPSS, IPSS-QoL and OABSS progressed from 28 to 8, from 5 to 2 and from 12 to 4 respectively. Conclusion: This case study suggests that Korean medicine accompaning myofascial trigger-point accupuncture may contribute to treat severe & persistent lower urinary tract symptoms after radical prostatectomy.

A Comparative Study of IP Mobility Protocols : Fast Handover vs. Mobile IPv6 (IP 이동성 지원 프로토콜에 대한 비교 연구: Fast Handover 대 Mobile IPv6)

  • 백상헌;최양희
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.6A
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    • pp.651-659
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    • 2004
  • The Fast Handover protocol [1] provides seameless handover in wireless If networks by minimizing handover latency, which uses anticipation based on layer 2 (L2) trigger information. Therefore, it incurs higher signaling costs compared with the basic Mobile U protocol. Furthermore, since the L2 trigger is based on fluctuating wireless channel states, the handover anticipation may sometimes be incorrect. In the case of incorrect anticipation, unnecessary buffer space may be used for the purpose of providing a smooth handover. Therefore, it is essentical to analyze these overhead costs, in order to evaluate and compare the performance of Fast Handover with that of the basic Mobile U protocol. In this paper, we analyzed the overhead associated with Fast Handover including the signaling cost and the packet delivery cost. We formulated these costs based on a timing diagram and compared Fast Handover with basic Mobile Ipv6 in terms of their packet loss rates and buffer requirements. Also, we studied the impact of the L2 triggering time on the total overhead cost.

TCP Congestion Control Algorithm Using L2 Trigger in Heterogeneous Networks (Link-layer Trigger를 통한 유무선 통합 환경에서의 TCP 혼잡제어)

  • Kim, Yu-Mi;Hong, Choong Seon
    • Proceedings of the Korea Information Processing Society Conference
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    • 2004.05a
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    • pp.1359-1362
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    • 2004
  • 유무선 통합 환경에서의 기존의 TCP가 가지는 문제점은 혼잡 제어 알고리즘이 무선환경의 에러를 모두 congestion으로 인식하는 것에 있다. 무선환경에 의한 에러일 경우 네트워크의 상황이 좋음에도 불구하고 전송률을 낮춰서 네트워크의 성능을 떨어뜨리게 된다. 따라서 본 논문에서는 Link-layer가 발생시킨 이벤트를 통해 에러의 원인을 명확이 구분하여 기존의 TCP의 큰 수정이 없이도 성능을 크게 향상 시킬 수 있는 혼잡 제어 알고리즘을 제안한다.

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A Micro Mobility Management Scheme in Wireless LAN Environments (무선 LAN환경에서 마이크로 이동성 지원 방안)

  • 고광신;차우석;김형준;조기환
    • Journal of KIISE:Information Networking
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    • v.31 no.2
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    • pp.158-170
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    • 2004
  • Mobile IP is a base protocol to support host mobility in IP-based wireless network. It is well known that the protocol contains two main delay factors on a handoff process; one is to detect a host movement, and the other is to register the host's current location to its home network. This paper examines Layer 2(L2) handoff procedure in the IEEE 802.11 Wireless LAN, and identifies these L2 triggers that can be usefully applied to Layer 3(L3) handoff. Then, the MCAA(Multiple-Casting using Anchor Agent) mechanism is proposed. It makes use of the L2 trigger and the network topology to construct an anchor agent dynamically, and the multiple-casting scheme to prevent an ongoing packet to be lost. Using a network simulator, the proposed mechanism has been evaluated the handoff delay and the packet lost point of view, in comparison with the regional registration protocol which is the most well known micro mobility support mechanism.

Development of Hole Inspection Program using Touch Trigger Probe on CNC Machine Tools (CNC 공작기계 상에서 접촉식 측정 프로브를 이용한 홀 측정 프로그램 개발)

  • Lee, Chan-Ho;Lee, Eung-Suk
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.36 no.2
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    • pp.195-201
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    • 2012
  • According to many customers' requests, optical measurement module (OMM) applications using automatic measuring devices to measure the machined part rapidly on a machine tool have increased steeply. Touch trigger probes are being used for job setup and feature inspection as automatic measuring devices, and this makes quality checking and machining compensation possible. Therefore, in this study, the use of touch trigger probes for accurate measurement of the machined part has been studied and a macro program for a hole measuring cycle has been developed. This hole is the most common feature to be measured, but conventional methods are still not free from measuring error. In addition, the eccentricity change of the least square circle was simulated according to the roundness error in a hole measurement. To evaluate the reliability of this study, the developed hole-measuring program was executed to measure the hole plate on the machine and verify the roundness error in the eccentricity simulation result.

Parameter resetting in adult second language acquisition (성인의 제2 언어 습득에 있어서 매개변수 재고정)

  • Kim, Hak-Soo
    • English Language & Literature Teaching
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    • no.5
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    • pp.219-247
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    • 1999
  • The purpose of this paper is to examine how Korean learners of English reset the "prodrop" parameter of Korean into "non-prodrop" parameter of English in the process of English acquisition. An experiment was conducted to 45 Korean learners of English on the prodrop phenomenon, namely on the null referential or null nonreferential subject, and subject-verb agreement by way of grammatical judgment. The results of the experiment are as follows: First, L2 learners follow the parameter of L1, and then reset the parameter of L2 regardless of the parameter of L1 as their L2 abilities advance. Thus, this study provides further support for the hypothesis that universal grammar is available via L1. Second, the referential subject is, at first, easier to acquire than nonreferential subject, and the triggering fact for the switch from [+prodrop] to [-prodrop] was the use of nonreferential subjects. Third, 3rd person agreement has no connection with the acquisition of the prodrop parameter as a result of subject-verb agreement. Therefore, these results indicate that verb agreement is not a trigger for the recognition of the obligatory subject.

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Effect of a dual trigger on oocyte maturation in young women with decreased ovarian reserve for the purpose of elective oocyte cryopreservation

  • Kim, Se Jeong;Kim, Tae Hyung;Park, Jae Kyun;Eum, Jin Hee;Lee, Woo Sik;Lyu, Sang Woo
    • Clinical and Experimental Reproductive Medicine
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    • v.47 no.4
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    • pp.306-311
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    • 2020
  • Objective: The aim of this study was to determine whether co-administration of a gonadotropin-releasing hormone (GnRH) agonist and human chorionic gonadotropin (hCG) for final oocyte maturation improved mature oocyte cryopreservation outcomes in young women with decreased ovarian reserve (DOR) compared with hCG alone. Methods: Between January 2016 and August 2019, controlled ovarian stimulation (COS) cycles in women (aged ≤35 years, anti-Müllerian hormone [AMH] <1.2 ng/mL) who underwent elective oocyte cryopreservation for fertility preservation were retrospectively analyzed. Results: A total of 76 COS cycles were triggered with a GnRH agonist and hCG (the dual group) or hCG alone (the hCG group). The mean age and serum AMH levels were comparable between the two groups. The duration of stimulation, total dose of follicle-stimulating hormone used, and total number of oocytes retrieved were similar. However, the number of mature oocytes retrieved and the oocyte maturation rate were significantly higher in the dual group than in the hCG group (p=0.010 and p<0.001). After controlling for confounders, the dual-trigger method remained a significant factor related to the number of mature oocytes retrieved (p=0.016). Conclusion: We showed improved mature oocyte collection and maturation rate with the dual triggering of oocyte maturation in young women with DOR. A dual trigger appears to be more beneficial than hCG alone in terms of mature oocyte cryopreservation for young women with DOR.

Influence for Carcinoma Cell and Lymphatic Cell of Acetyl Arsonate (아세틸 아르소네이트의 면역세포와 암세포에 미치는 영향: L1210, Sarcoma 180, MOLT-4 등 사람과 생쥐에 대한 작용비교)

  • Jeong, Yong-Ja;Seong, Yeong-Gi
    • YAKHAK HOEJI
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    • v.40 no.5
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    • pp.599-607
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    • 1996
  • Acetylarsonate was prepared for testing antitumor and immunological effects. It showed cytotoxicity directly on Sarcoma 180. L1210 and MOLT-4 by MTT assay. It did not seemed to trigger the mitosis of human lymphocytes in culture, but that showed the cytotoxicity with higher dose. The rosette formation and spleen weight of mouse which acetylarsonate was administered to for 2 weeks were increased. Furthermore, peripheral helper T- and cytotoxic/suppressor T-lymphocytes were increased in acetylarsonate-injected-mice significantly when it was estimated with simultaneous 2 color analysis using anti Lyt2-FITC and L3T4-PE monoclonal antibody by Flow cytometer.

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Marked effect of Cuscuta on puerarin accumulation in cell cultures of Pueraria tuberosa grown in shake flasks and a bioreactor

  • Goyal, Shaily;Sharma, Varsha;Ramawat, Kishan G.
    • Plant Biotechnology Reports
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    • v.5 no.2
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    • pp.121-126
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    • 2011
  • Isoflavonoid production in cell cultures of Pueraria tuberosa as influenced by an angiospermic parasite, Cuscuta reflexa, was studied. During the time course, maximum isoflavonoid content was recorded when Cuscuta elicitor was added on day 15 of culture. Among various concentrations of elicitor tried, $1g\;l^{-1}$ of Cuscuta elicitor was found to be the most effective. The optimized elicitation conditions were used in vessels of varying capacity where maximum yield of ${\sim}91mg\;l^{-1}$ of isoflavonoid was recorded in a 2-l bioreactor which was about 19% higher than the control cultures. In this case, puerarin content increased up to $11mg\;l^{-1}$ which was 580% higher that the value recorded in the control cultures. In the bioreactor, 8 days of elicitation was optimal for the high accumulation of isoflavonoid, giving productivity of ${\sim}4mg\;l^{-1}\;day^{-1}$. The study showed persistent high isoflavonoid yield even during scale-up. Use of a preparation of Cuscuta reflexa as an elicitor is reported for the first time. The increase in isoflavonoid content was elicitor dose-dependent and can be explored to trigger high yields of isoflavonoid/secondary metabolites in production.