• Title/Summary/Keyword: UTP

Search Result 231, Processing Time 0.023 seconds

Implementation of 500BASE-T with 2 Pairs UTP (2조 UTP를 이용한 500BASE-T의 구현)

  • Chung, Hae;Jeon, Seong-Bae;Kim, Jin-Hee;Park, Hyung-Jin
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.36 no.10B
    • /
    • pp.1150-1158
    • /
    • 2011
  • More than 100 Mbps rate is needed in the UBcN for a subscriber to receive broadband traffics with multi-channel like UDTV or 3DTV. Although the optical fiber is recently deployed for the FTTH, the UTP is the most widely used medium and will be used in UBcN age. Network providers may consider the 1000BASE-T or the vectorized VDSL if they adopts the UTP in the place where does not have optical fibers. But UTP should be expanded because 1000BASE-T and vectorized UTP needs 4 and 3 pairs cable, respectively while residential region has not exceeding 2 pair UTP cable. To solve the problem, we propose a 500BASE-T technology using 2 pairs UTP in this paper. The technology introduces a rate adaptation sublayer and a SERDES sublayer above and under the PCS, respectively. The rate adaptation sublayer is compatible for the GMII. Also, if we modify the SERDES sublayer, the technology can easily obtain 250BASE-T with 2 pairs UTP. We implement such functions with FPGA and analog board and verify the function of rate adaptation and symbol vector synchronization, and effective transmission rate by experiments. In particular, we show that link efficiency is increased by enable control in the rate adaptation sublayer.

Near-end Cross-talk Analysis of Unshielded Twisted Pair Cable using the Transmission Line Model (전송선로 모델을 이용한 UTP 케이블의 NEXT 해석)

  • Lee, Won-Hui;Park, Wee-Sang
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.9 no.2
    • /
    • pp.59-63
    • /
    • 2009
  • The UTP cable has been widely used, recently it is being developed for use in the UHF frequency band. One important characteristic of the UTP cable is NEXT. This research is to develop a pitch selection technique for an UTP cable which leads to a satisfactory NEXT. The transmission line model involving mutual inductances and capacitances between line pairs is used, and the simulation was carried out for frequencies from 1 MHz to 600 MHz. With respect to the worst margin of the NEXT for a Cat. 6 cable the simulation and measurement results show a good agreement.

  • PDF

Comparison of Muscle Activity Ratio of Upper Trapezius to Serratus Anterior During Shoulder Elevation Between Subjects With and Without Pain Experienced in Upper Trapezius

  • Ahn, Sun-Hee;Kwon, Oh-Yun;Choung, Sung-Dae;Kim, Si-Hyun;Jeon, In-Cheol
    • Physical Therapy Korea
    • /
    • v.21 no.2
    • /
    • pp.67-73
    • /
    • 2014
  • The aim of this study was to compare the activity of the upper trapezius (UT) and serratus anterior (SA) and ratio of UT to SA during shoulder elevations. Ten subjects with UT pain (UTP) and 13 subjects without UTP participated in this study. Subjects with a UTP of over five in a pain intensity visual analogue scale (0-10 ㎝) for more than 2 months and latent myofascial trigger points (MTrPs) in the UT muscle were included in the UTP group. Electromyography (EMG) data of UT and SA at 1st and 10th elevations were analyzed. Two-way repeated analyses of variance were used to compare the EMG activity of UT and SA and the ratio of UT to SA during shoulder elevations between groups with and without UTP. There was a significant increase in UT/SA ratio in the group with UTP compared to the group without UTP (p=.01). The activity of UT and SA measured at the 10th elevation was significantly greater than that in the first elevation (p<.05). The activity of SA was significantly greater in the group without UTP than the group with UTP (p=.03). However, there was no significant difference between groups with and without UTP in terms of UT activity (p=.28). These results indicate that UTP may have relevance to the increased muscle activity ratio of UT to SA during shoulder elevations.

The Signaling Mechanism of Contraction Induced by ATP and UTP in Feline Esophageal Smooth Muscle Cells

  • Kwon, Tae Hoon;Jung, Hyunwoo;Cho, Eun Jeong;Jeong, Ji Hoon;Sohn, Uy Dong
    • Molecules and Cells
    • /
    • v.38 no.7
    • /
    • pp.616-623
    • /
    • 2015
  • P2 receptors are membrane-bound receptors for extracellular nucleotides such as ATP and UTP. P2 receptors have been classified as ligand-gated ion channels or P2X receptors and G protein-coupled P2Y receptors. Recently, purinergic signaling has begun to attract attention as a potential therapeutic target for a variety of diseases especially associated with gastroenterology. This study determined the ATP and UTP-induced receptor signaling mechanism in feline esophageal contraction. Contraction of dispersed feline esophageal smooth muscle cells was measured by scanning micrometry. Phosphorylation of $MLC_{20}$ was determined by western blot analysis. ATP and UTP elicited maximum esophageal contraction at 30 s and $10{\mu}M$ concentration. Contraction of dispersed cells treated with $10{\mu}M$ ATP was inhibited by nifedipine. However, contraction induced by $0.1{\mu}M$ ATP, $0.1{\mu}M$ UTP and $10{\mu}M$ UTP was decreased by U73122, chelerythrine, ML-9, PTX and $GDP{\beta}S$. Contraction induced by $0.1{\mu}M$ ATP and UTP was inhibited by $G{\alpha}i_3$ or $G{\alpha}q$ antibodies and by $PLC{\beta}_1$ or $PLC{\beta}_3$ antibodies. Phosphorylated $MLC_{20}$ was increased by ATP and UTP treatment. In conclusion, esophageal contraction induced by ATP and UTP was preferentially mediated by P2Y receptors coupled to $G{\alpha}i_3$ and $G{\alpha}q$ proteins, which activate $PLC{\beta}_1$ and $PLC{\beta}_3$. Subsequently, increased intracellular $Ca^{2+}$ and activated PKC triggered stimulation of MLC kinase and inhibition of MLC phosphatase. Finally, increased $pMLC_{20}$ generated esophageal contraction.

PDZ Peptide of the ZO-1 Protein Significantly Increases UTP-Induced MUC8 Anti-Inflammatory Mucin Overproduction in Human Airway Epithelial Cells

  • Han Seo;Hyun-Chae Lee;Ki Chul Lee;Doosik Kim;Jiwook Kim;Donghee Kang;Hyung-Joo Chung;Hee-Jae Cha;Jeongtae Kim;Kyoung Seob Song
    • Molecules and Cells
    • /
    • v.46 no.11
    • /
    • pp.700-709
    • /
    • 2023
  • Mucus hyperproduction and hypersecretion are observed often in respiratory diseases. MUC8 is a glycoprotein synthesized by epithelial cells and generally expressed in the respiratory track. However, the physiological mechanism by which extracellular nucleotides induce MUC8 gene expression in human airway epithelial cells is unclear. Here, we show that UTP could induce MUC8 gene expression through P2Y2-PLCβ3-Ca2+ activation. Because the full-length cDNA sequence of MUC8 has not been identified, a specific siRNA-MUC8 was designed based on the partial cDNA sequence of MUC8. siRNA-MUC8 significantly increased TNF-α production and decreased IL-1Ra production, suggesting that MUC8 may downregulate UTP/P2Y2-induced airway inflammation. Interestingly, the PDZ peptide of ZO-1 protein strongly abolished UTP-induced TNF-α production and increased IL-1Ra production and MUC8 gene expression. In addition, the PDZ peptide dramatically increased the levels of UTP-induced ZO proteins and TEER (trans-epithelial electrical resistance). These results show that the anti-inflammatory mucin MUC8 may contribute to homeostasis, and the PDZ peptide can be a novel therapeutic candidate for UTP-induced airway inflammation.

A Study on a Reduced Crosstalk for the Design of 100 MHz High Speed Data Transmission Modular Jack (Crosstalk를 방지한 100 MHz 고속 데이터 전송 Modular Jack의 설계 및 제작에 관한 연구)

  • 이중근;안현수
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.10 no.1
    • /
    • pp.1-10
    • /
    • 1999
  • In this paper, a method of canceling and suppressing differential-mode crosstalk-noise signals caused by non-uniform coupling between two transmission lines in UTP(Unshielded Twisted Paris) modular jacks is discussed. Differential-mode crosstalk-noise signals in balanced transmission lines in UTP modular jacks were suppressed by inserting auxiliary capacitance between balanced transmission line pairs which are located closely enough to be effectively coupled each other. To verify the effectiveness of the inserted capacitances, precisely calculated auxiliary capacitances were applied to 10 pin modular jacks which are used in local area networks at 100 Mb/s with unshielded twisted pair-cables. The NEXT(Near-End Crosstalk) losses were measured to prove its applicability.

  • PDF

Design of UTP LAN Cable With Enhanced Alien Crosstalk Characteristic (이질 누화 특성이 개선된 UTP LAN 케이블의 설계)

  • Kim, June-Hyong;Lee, Seong-Jun;Oh, Sung-Ki
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.37A no.12
    • /
    • pp.1115-1121
    • /
    • 2012
  • In this paper, the design of UTP LAN cable with enhanced alien crosstalk characteristic is proposed. Proposed LAN cable is made with jacket of the irregularly corrugation type. If necessary, it is possible to use the special cross-filler. The alien crosstalk characteristic is enhanced by using proposed cable with inner jacket of the irregularly corrugation type in wide frequency band. The design of the cable was based on parameters of the standard EIA/TIA 568-B.2-10.

Analysis and Reduction of Transient Time Periods for Smooth Handoff Packets in Mobile IPv6 Networks (Mobile IPv6망에서 Smooth 핸드오프 패킷의 과도기간 분석 및 단축)

  • Lee, Dong-Wook;Kim, Jong-Won
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.28 no.11B
    • /
    • pp.999-1006
    • /
    • 2003
  • In the paper, we investigate the impact of handoff on the packet delivery in the Mobile IPv6 networks, where the smooth handoff is adopted. That is measured by an 'unstable time period (UTP)', a 'silence time period(STP)', and a 'handoff time period (HTP)' in the mobile node's perspective. Then, we propose a queuing model to get the exact value of the handoff transient time. The numerical results show that the queuing delay for the handoff packets and the involved link (or route) capacities affect the estimated UTP, STP, and HTP. On the other hand, the damage of application caused by handoff will increases when the handoff transient time becomes longer. We show that the priority scheduling method can achieve shorter STP and UP than the FIFO scheduling method that is generally used in best-effort IP network.

Analysis of UTP channel specification for 10GBASE-T (10GBASE-T를 위한 UTP채널 특성 분석)

  • Han, Mi-Ja;Park, June;Song, Sang-Seob;Jung, Hae-Won;Kang, Tae-Ku
    • Proceedings of the IEEK Conference
    • /
    • 2003.11c
    • /
    • pp.11-14
    • /
    • 2003
  • 10GBASE-T is 10Gigabit Ethernet over horizontal structured, twisted-pair copper cabling.(1) It aims to transmit data at a speed of 10Gbps at a l00m distance away, through UTP (unshielded twisted -pair) Cat-5e cable 4-pair. This paper looks over the characteristic of media over Cat 5e, 6, 7, and then suggests how much noise should be removed from it in order to offer the transmission speed of 10Gbps as sending data through each physical medium.

  • PDF

A Study on the Command/File Server for INS (종합정보망(INS)을 위한 command/file server의 연구)

  • 이철수;이화연;황문준
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.12 no.5
    • /
    • pp.439-450
    • /
    • 1987
  • Data, distributed and/or duplicated among multiple computers interconnected by a LAN, need to be managed consistently and accessed transparently by users. A command/file server, named UTP, which meets the preceding needs was developed for supermini-computers which are interconnected by an Ethernet-based LAN and run under UNIX OS.

  • PDF