• Title/Summary/Keyword: Point-to-Point

Search Result 326, Processing Time 0.141 seconds

Standard Curve Validation using Trendlines in Excel (Excel의 추세선을 이용한 표준곡선 검증)

  • Lee, Kyung-Hwa;Park, Hyung-Ki;Shin, Young-Man
    • The Korean Journal of Nuclear Medicine Technology
    • /
    • v.20 no.2
    • /
    • pp.69-74
    • /
    • 2016
  • Purpose Using a regression formula of the trendline near the coefficient of determination (R2) "1" by substituting the dependent variable of the standard curve to calculate the values of the independent variable. To determine the suitability of a regression equation by comparing the difference between the independent variables of the standard curve and the predicted independent variables. Materials and Methods Perkin Elmer Gamma-Counter machine was used for Standard curve of regression methods. TSH. TG-Ag (Thyroglobulin Antigen), Insulin that used materials and method test to compare the result from the Excel trendline of the regression formula. Results Each of the value of coefficient of determination ($R^2$) and Trendline $R^2=1$, Polynomial Trendline for TSH, $R^2=1$, Polynomial Trendline for TG-Ag, $R^2=0.9994$, Polynomial Trendline for Insulin. Conclusion We confirmed that IRMA immune method is found to the nearest trends elected a standard curve using polynomial trendline. The independent variables to predict the trend by using a polynomial trendline formula containing the error was a limitation.

  • PDF

The Design of MPI Hardware Unit for Enhanced Broadcast Communication (효율적인 브로드캐스트 통신을 지원하는 MPI 하드웨어 유닛 설계)

  • Yun, Hee-Jun;Chung, Won-Young;Lee, Yong-Surk
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.36 no.11B
    • /
    • pp.1329-1338
    • /
    • 2011
  • This paper proposes an algorithm and hardware architecture for a broadcast communication which has the worst bottleneck among multiprocessor using distributed memory architectures. In conventional systems, collective communication is converted into point-to-point communications by MPI library cell without considering the state of communication port of each processing node which represents the processing node is in busy state or free state. If conflicting point-to-point communication occurs during broadcast communication, the transmitting speed for broadcast communication is decreased. Thus, this paper proposed an algorithm which determines the order of point-to-point communications for broadcast communication according to the state of each processing node. According to the state of each processing node, the proposed algorithm decreases total broadcast communication time by transmitting message preferentially to the processing node with communication port in free state. The proposed MPI unit for broadcast communication is evaluated by modeling it with systemC. In addition, it achieved a highly improved performance for broadcast communication up to 78% with 16 nodes. This result shows the proposed algorithm is useful to improving total performance of MPSoC.

Fast and Reliable Dynamic Common Channel Setup and Reconstruction Method for the Point-to-Point Communications in Military CR Networks (군용 인지 무선 네트워크 환경에서 점대점 통신을 위한 신속하고 신뢰성 있는 동적 공통 채널 설정 및 복원 방법)

  • Kim, Min-Gyu;Choi, Jae-Kark;Yoo, Sang-Jo;Jang, Young-Up;Jeong, Kilsoo;Lee, Kwang-Eog
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.37C no.11
    • /
    • pp.1112-1128
    • /
    • 2012
  • In cognitive radio networks, secondary users are allowed to utilize the channels currently not occupied by primary users opportunistically. Secondary users can communicate with each other using the commonly available channels (common channels) which may change dynamically based on the activity of the primary users. Even though many studies have dealt with cognitive radio behaviors, the detailed procedures for common channel configuration have not been paid much attention. In this paper, the fast and reliable dynamic common channel setup and reconstruction method for the point-to-point communications in military cognitive radio networks is proposed. The detailed time parameters are considered for common channel setup and reconstruction, such as the packet exchange time, channel request waiting time, and rendezvous time. Through numerical analyses, the delay and throughput performance of the proposed method is derived and evaluated.

60GHz band RF transceiver of the broadband point-to-point communication system (광대역 점대점 통신시스템용의 60GHz 대역 무선 송수신기)

  • Choi, Jae-Ha;Yoo, Young-Geun
    • Journal of the Institute of Convergence Signal Processing
    • /
    • v.13 no.1
    • /
    • pp.39-43
    • /
    • 2012
  • 60GHz band RF transceiver was made with the NRD waveguide structure for the point- to-point communication. A dielectric line that of comprising NRD waveguide was the milling process was not easy because a material gets soft, and also compression and expansion according to a temperature were serious, so this line was not suitable for the device in which the resonance characteristic was important. In addition, the thing for comprising amplification module was difficult in the NRD waveguide structure. In this paper, a way in which to overcome mentioned in upper part, the transceiver was made by below technology. Components in which the resonance characteristic was not important were made with the NRD waveguide hybrid IC, and components in which the resonance characteristic was important were made with waveguide. An amplifier packaged and modularizing the bare chip, it equipped at the NRD waveguide within. Manufactured transceiver communicated with FDD method, and it had 10dBm output power, and -60dBm minimum receive sensitivity.

A Non-Periodic Synchronization Algorithm using Address Field of Point-to-Point Protocol in CDMA Mobile Network (CDMA이동망에서 점대점 프로토콜의 주소영역을 이용한 비주기적 동기 알고리즘)

  • Hong, Jin-Geun;Yun, Jeong-O;Yun, Jang-Heung;Hwang, Chan-Sik
    • Journal of KIISE:Computer Systems and Theory
    • /
    • v.26 no.8
    • /
    • pp.918-929
    • /
    • 1999
  • 동기식 스트림 암호통신 방식을 사용하는 암호통신에서는 암/복호화 과정 수행시 암호통신 과정에서 발생하는 사이클슬립으로 인해 키수열의 동기이탈 현상이 발생되고 이로 인해 오복호된 데이타를 얻게된다. 이러한 위험성을 감소하기 위한 방안으로 현재까지 암호문에 동기신호와 세션키를 주기적으로 삽입하여 동기를 이루는 주기적인 동기암호 통신방식을 사용하여 왔다. 본 논문에서는 CDMA(Cellular Division Multiple Access) 이동망에서 데이타서비스를 제공할 때 사용되는 점대점 프로토콜의 주소영역의 특성을 이용하여 단위 측정시간 동안 측정된 주소비트 정보와 플래그 패턴의 수신률을 이용하여 문턱 값보다 작은경우 동기신호와 세션키를 전송하는 비주기적인 동기방식을 사용하므로써 종래의 주기적인 동기방식으로 인한 전송효율성 저하와 주기적인 상이한 세션키 발생 및 다음 주기까지의 동기이탈 상태의 지속으로 인한 오류확산 등의 단점을 해결하였다. 제안된 알고리즘을 링크계층의 점대점 프로토콜(Point to Point Protocol)을 사용하는 CDMA 이동망에서 동기식 스트림 암호 통신방식에 적용시 동기이탈율 10-7의 환경에서 주기가 1sec인 주기적인 동기방식에서 요구되는 6.45x107비트에 비해 3.84x105비트가 소요됨으로써 전송율측면에서의 성능향상과 오복호율과 오복호 데이타 비트측면에서 성능향상을 얻었다. Abstract In the cipher system using the synchronous stream cipher system, encryption / decryption cause the synchronization loss (of key arrangement) by cycle slip, then it makes incorrect decrypted data. To lessen the risk, we have used a periodic synchronous cipher system which achieve synchronization at fixed timesteps by inserting synchronization signal and session key. In this paper, we solved the problem(fault) like the transfer efficiency drops by a periodic synchronous method, the periodic generations of different session key, and the incorrectness increases by continuing synchronization loss in next time step. They are achieved by the transfer of a non-periodic synchronous signal which carries synchronous signal and session key when it is less than the threshold value, analyzing the address field of point-to-point protocol, using the receiving rate of address bits information and flag patterns in the decision duration, in providing data services by CDMA mobile network. When the proposed algorithm is applied to the synchronous stream cipher system using point-to-point protocol, which is used data link level in CDMA mobile network, it has advanced the result in Rerror and Derror and in transmission rate, by the use of 3.84$\times$105bits, not 6.45$\times$107bits required in periodic synchronous method, having lsec time step, in slip rate 10-7.

The study on Multicast Cell Scheduling for Parallel Multicast packet switch with Ring Network (링망을 이용한 병렬 멀티캐스트 패킷스위치에서의 멀티캐스트 셀 스케줄링에 관한 연구)

  • 김진천
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.4 no.5
    • /
    • pp.1037-1050
    • /
    • 2000
  • A goal of a BISDN network is to provided integrated transport for a wide range of applications such as teleconferencing, Video On Demand etc. There require multipoint communications in addition to conventional point-to-point connections. Therefore multicast capabilities are very essential in multimedia communications. In this paper, we propose a new multicast cell scheduling method on the Parallel Multicast Packet Switch with Ring network: PMRN which are based on separated HOL. In this method, we place two different HOLs, one for unicast cells and the other for multicast cells. Then using non-FIFO scheduling, we can schedule both unicast cells and multicast cells which are available at the time in the input buffer. The simulation result shows that this method reduces the delay in the input buffer and increases the efficiency of both point-to-point network and ring network and finally enhances the bandwidth of the overall packet switch. A goal of a BISDN network is to provided integrated transport for a wide range of applications such as teleconferencing, Video On Demand etc. There require multipoint communications in addition to conventional point-to-point connections. Therefore multicast capabilities are very essential in multimedia communications. In this paper, we propose a new multicast cell scheduling method on the Parallel Multicast Packet Switch with Ring network: PMRN which are based on separated HOL. In this method, we place two different HOLs, one for unicast cells and the other for multicast cells. Then using non-FIFO scheduling, we can schedule both unicast cells and multicast cells which are available at the time in the input buffer. The simulation result shows that this method reduces the delay in the input buffer and increases the efficiency of both point-to-point network and ring network and finally enhances the bandwidth of the overall packet switch.

  • PDF

A Study on Driving Characteristics of Drivers at the Enforcement System Based on Speed Data (무인속도위반단속시스템 설치구간에서의 운전자 운행특성 분석)

  • Lee, Ho-Won;Kim, Dong-Hyo;Park, Boo-Hee;Lee, Choul-Ki;Ha, Dong-Ik;Lee, Byung-Chul
    • The Journal of The Korea Institute of Intelligent Transport Systems
    • /
    • v.9 no.6
    • /
    • pp.43-53
    • /
    • 2010
  • The increasing interest in the use of automated photographic equipment in Korea enables to detect speed violation and enforce traffic laws. Since 1996, Korean National Police Agency has been promoting a project for installation of Automated Speed Enforcement (ASE) system aiming at reduction of accidents. Recently, point to point speed cameras operate to measure a driver's average speed across length of road and/or the spot speed at individual camera sites along the road length. In this study, we were analyzed to driver's operating characteristics in point to point speed cameras. The point to point speed camera system has link-long influence on drivers and their speeds despite enforcement being visible only at the start and end of enforced road length. Then, mean and 85th percentile speeds were below speed limit along enforced road length by the two camers. Also, Female drivers were driving at low speed than male drivers along the road length.

Embedded Processor based PPP Implementation for Globalstar Satellite Modem (글로벌스타 위성 모뎀을 위한 임베디드 프로세서 기반 PPP(Point-to-Point Protocol) 구현)

  • Moon, Hyun-Geol;Lee, Myung-Eui
    • The KIPS Transactions:PartC
    • /
    • v.15C no.5
    • /
    • pp.409-418
    • /
    • 2008
  • In this paper, we programed the PPP(Point-to-Point Protocol) used in embedded application environments for Globalstar Satellite Modem. There are number of satellite communication systems such as Orbcomm, Globalstar, Inmarsat and etc. But each satellite data service have provided a communication interface only for their own data links. A data communication link is needed to communicate with Globalstar satellite service. Globalstar communication system uses PPP to establish data communication link, so we implemented the embedded processor based PPP protocol. The user terminal equipment also designed in this paper has various input/output devices and sensors applicable to any user specific application. The proposed PPP program works well with Globalstar data communication link through experimental tests.

Appearance-based Object Recognition Using Higher Order Local Auto Correlation Feature Information (고차 국소 자동 상관 특징 정보를 이용한 외관 기반 객체 인식)

  • Kang, Myung-A
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.15 no.7
    • /
    • pp.1439-1446
    • /
    • 2011
  • This paper describes the algorithm that lowers the dimension, maintains the object recognition and significantly reduces the eigenspace configuration time by combining the higher correlation feature information and Principle Component Analysis. Since the suggested method doesn't require a lot of computation than the method using existing geometric information or stereo image, the fact that it is very suitable for building the real-time system has been proved through the experiment. In addition, since the existing point to point method which is a simple distance calculation has many errors, in this paper to improve recognition rate the recognition error could be reduced by using several successive input images as a unit of recognition with K-Nearest Neighbor which is the improved Class to Class method.

Phase Locked VCDRO for the 20 GHz Point-to-point Radio Link (20 GHz 고정국용 위상고정 VCDRO)

  • 주한기;장동필
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
    • /
    • v.10 no.6
    • /
    • pp.816-824
    • /
    • 1999
  • Design and performance of 18 GHz phase locked dielectric resonator oscillator(PLDRO) for Point-to-point radio link using analog phase locked loop is described which achieve high stability and low SSB phase noise. The module consists of an 18 GHz voltage controlled dielectric resonator oscillator(VCDRO), buffered amplifier, analog phase detector which are integrated to form a miniature hybrid circuit. In addition, containing a low phase noise VHF PLL has been designed to lock any other conventional N times frequency of crystal oscillator. The module achieves stable phase locked state, exhibits output power of 21 dBm at 18.00 GHz, -34 dBc harmonic suppression and -75 dBc/Hz phase noise at 10 kHz offset frequency from carrier.

  • PDF