• Title/Summary/Keyword: IS2000

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On the Implementation and Standardization of the Mobile Communication (모바일 통신의 구현과 표준안에 관한 연구)

  • Hong, Bong-Hwa;Lee, Ji-Young
    • The Journal of Information Technology
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    • v.8 no.1
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    • pp.1-10
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    • 2005
  • We research and analyze to the IMT-2000, it contains the various problem with the bandwidth and standardization. Finally, we proposed to the method of the standardization and implementation for the Beyond IMT-2000, in this paper. Comparing the Beyond the IMT-2000 take advantage of the aspect of the GPS(global positioning system) service and remote medical treatment service and wireless internet service and VOD(Video on Demand) service with IMT-2000. Henceforth, we are consider to the development of the contents which it is adaptable to various environment.

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Design and Implementation of Dual Band Antenna for IMT-2000 and 5.7㎓ Wireless Local Area Network (IMT-2000/5.7㎓ 무선 LNA용 이중공진 안테나의 설계 및 구현)

  • 김창일;김주성;공성신;양운근
    • Proceedings of the Korea Electromagnetic Engineering Society Conference
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    • 2002.11a
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    • pp.237-240
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    • 2002
  • In this paper, we designed and implemented the dual band antenna for IMT-2000 and 5.7㎓ WLAN(Wireless Local Area Network). The antenna was designed by using 3D simulations program, HFSS(High Frequency Structure Simulator). The electrical characteristics were measured by using HP 8720C network analyzer and measured maximum S$\sub$11/ was -25㏈, and maximum VSWR(Voltage Standing Wavc Ratio) was 1.26 for all frequency bands of interests in IMT-2000 and 5.7㎓ WLAN. Simulation results for antenna gain at 2㎓ and 5.7㎓ were 1.31㏈i and 4.1㏈i with omni directional radiation pattern. Implemented antenna is compact sized and can be produced in low cost enough for commercialization.

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Characterization of Sterically Stabilized Liposomes and Their Stability in Rat Plasma in Vitro (입체구조적으로 안정화된 리포좀의 특성 및 혈장내 안정성)

  • 이지혜
    • YAKHAK HOEJI
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    • v.44 no.3
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    • pp.251-256
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    • 2000
  • Sterically stabilized liposomes (SSL) composed of distearoylphosphatidylcholine, cholesterol, dicetylphosphate and distearoylphosphatiodylethanolamine-N-poly(ethyleneglycol) 2000 (DSPE-PEG 2000) were made by reverse phase evaporation method to prolong biological half-life and decrease toxic side effect of drug. Streptozocin (572), a water-soluble antitumor agent with short half-life, was selected as a model drug. The size of SSL was controlled by polycarbonate extrusion to 100 nm which is adequate size for long circulation in plasma. The release rate of drugs from SSL in PBS was evaluated. And the stability of STZ-containing liposomes against drug leakage into rat plasma was evaluated in order to investigate the interaction of liposome and plasma protein. Incorporation of DSPE-PEG 2000 into conventional liposomes significantly decreased the drug leakage into rat plasma.

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Harmonization, Mobility Management, and Fixed-Mobile Convergence: Studies in the ITU-T Special Study Group on

  • Delmond, Frederic;Kim, Young-Kyun;Pandya, Raj;Pettitt, Bruce;Samou, Jean-Claude
    • Journal of Communications and Networks
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    • v.4 no.4
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    • pp.314-320
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    • 2002
  • The various sectors of the International Telecommunication Union (ITU) have been addressing the evolution of thirdgeneration and future wireless systems in the context of a comprehensive International Mobile Telecommunications 2000 (IMT-2000) project, and within the ITU’s Telecommunication Standardization Sector (ITU-T) a Special Study Group on “IMT-2000 and Beyond” has been established to address the network aspects of these emerging wireless systems. The Special Study Group (SSG) is playing a global role in this general area, in which a number of regional standards development organizations and a variety of industry forums are also active. This paper provides background information on the SSG and describes the SSG’s ongoing work addressing medium-term issues relating to convergence of fixed and mobile systems and the harmonization of evolving IMT-2000 systems. The paper also addresses related mobility management aspects.

Preliminary Review on Proposed New Contents in Incoterms 2010 -With a Special Reference to the 2nd Draft September 18, 2009 (INCOTERMS 2010의 주요 개정내용에 관한 연구 -2009. 9월 2차 초안을 중심으로-)

  • Huh, Jae-Chang
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.45
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    • pp.33-50
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    • 2010
  • The Incoterms, short for "International Commercial Terms," have been widely used as International Rules for the Interpretation of Trade Terms since 1936. The Incoterms have been revised six times in order to adapt them to contemporary commercial practice. The current version is Incoterms 2000. The revised version of Incoterms 2000 will be published in the fourth quarter of 2010 and will be effective from January 1st 2010. The first and second draft of Incoterms 2010 have been carried out by a small global Drafting Group, representing seven nationalities and various areas of substantive expertise. In this paper, I reviewed the main contents in the 2nd Draft of Incoterms 2010. This paper contributes to help the parties concerned to understand the new changes from Incoterms 2000 and to choose the appropriate trade term.

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Packet loss pattern modeling of cdma2000 mobile Internet channel for network-adaptive multimedia service (cdma2000 통신망에서 적응적인 멀티미디어 서비스를 위한 패킷 손실 모델링)

  • Suh Won-Bum;Park Sung-Hee;Suh Doug-Young;Shin Ji-Tae
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.29 no.1B
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    • pp.52-63
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    • 2004
  • Packet loss process of cdma2000 mobile Internet channel deployed in Korea is modeled as a two state Markov process known as Gilbert model. This paper proposes the procedures to derive four parameters of the our modified Gilbert model from packet loss trace taken from two major cdma2000 networks in Korea. These four parameters are derived in various situations, that is, with fixed and moving terminals, in open field and urban areas. They can be used to produce synthetic packet loss patterns for study of the channel. Moreover, if they are calculated on-line during multimedia service, they can be used to make loss protection controls adaptive to network condition.

Low-power Design and Implementation of IMT-2000 Interpolation Filter using Add/Sub Processor (덧셈 프로세서를 사용한 IMT-2000 인터폴레이션 필터의 저전력 설계 및 구현)

  • Jang Young-Beom;Lee Hyun-Jung;Moon Jong-Beom;Lee Won-Sang
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.42 no.1
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    • pp.79-85
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    • 2005
  • In this paper, low-power design and implementation techniques for IMT-2000 interpolation filter are proposed. Processor technique for DA(Distributed Arithmetic) filter and minimization technique for number of addition in CSD(Canonic Signed Digit) filter are utilized for low-power implementation. proposed filter structure consists of 3 blocks. In the first CSD coefficient block, every possible 4 bit CSD coefficients are calculated and stored. In second processor block, multiplication is done by MUX and addition processor in terms of filter coefficient. Finally, in third shift register block, multiplied values are output and stored in shift register. For IMT-2000 interpolation filter, proposed and conventional structures are implemented by using Verilog-HDL coding. Gate counts for the proposed structure is reduced to 31.57% comparison with those of the conventional one.

The Design and Implementation of a Multi-Band Planar Antenna for Cellular/PCS/IMT-2000 Base Station (셀룰러/PCS/IMT-2000 기지국용 다중대역 평판 안테나 설계 및 구현)

  • 오경진;김봉준;최재훈
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.15 no.8
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    • pp.781-787
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    • 2004
  • In this paper, a novel dual and wide band aperture stacked patch antenna for Cellular/PCS/IMT-2000 base station is presented. It consists of single microstrip patch having notches along the radiating patch, two dielectric substrates and a form material. To achieve wide band characteristic, we utilize the coupling effect between the notched patch and the resonant aperture in the ground plane and by properly cutting notches on the patch, an aperture stacked patch antenna could be designed to yield dual frequency operation. By the proper choice of resonant aperture size and height of a foam material, dual and wide band characteristic could be realized the measured impedance bandwidth(1:1.5 VSWR) of designed antenna at lower band(860 MHz) reaches 77 MHz and covers the Cellular CDMA band(824∼894 MHz). The measured impedance bandwidth(1:1.5 VSMR) of the designed antenna at upper band(1,960 MHz) is about 550 MHz and covers both the PCS band(1,750∼l,870 MHz) and the for-2000 band(1,920∼2,170 MHz). Good broadside radiation with high gain(5.65∼7.4 dBi) characteristics have also been observed.

Trend Analysis of Lung Cancer Incidence Rates in Ninawa Province, Iraq, from 2000 to 2010 - Decrease and Recent Stability

  • Al-Hashimi, Muzahem Mohammed Yahya;Wang, Xiang Jun
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.1
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    • pp.385-390
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    • 2014
  • Background: Lung cancer is the most frequent malignancy of men worldwide. In Ninawa in Iraq, lung cancer ranks first among cancers diagnosed in men. Since no prior studies have been conducted on incidence trends in our population the present investigation of rates during 2000-2010 was therefore performed. Materials and Methods: Registy data for lung cancer cases were collected from the Directorate of Health in Ninawa-Mosul Continuing Medical Education Center. We restricted our analyses to men categorized according to the age groups of 0- 39, 40-49, 50-59, 60-69 and 70+ years. The significance of incidence rate trends during 2000-2010 was tested using Poisson regression. Age-standardized rates (ASR), and age-specific rates per 100,000 population were calculated. Results: A total of 1,206 incident lung cancer were registered among males, accounting for 15.5% of all male cancers registered during 2000-2010. It ranked first throughout the period. Median age at diagnosis was 69 (mean $66.8{\pm}11.0$) years. The incidence rate of all male lung cancers in Ninawa (all ages) decreased from 26.4 per 100,000 in 2000 to 12.7 in 2010 (APC=-6.55%, p<.0001). The incidences in age groups 40-49, 50-59, 60-69 and 70+ decreased in earlier years and recently appeared (2007-2010) stable. The incidence in age group (0-39) remained stable between 2000-2010. Squamous cell carcinoma (SCC)was the most common type of lung cancer, while adenocarcinoma was relatively rare. Conclusions: With the data from Directorate of Health in Ninawa during the period 2000-2010, lung cancer is the most common cancer but generally declining. Among all age groups, the recent incidence of lung cancer remained stable. The SCC predominance suggests change in tobacco habits as an important factor in the trends observed.

Evaluating TFP Growth of the Korean Economy in 2000s through the Comparison of Growth Accounting Methods (한국경제의 2000년대 생산성 증가세 평가: 성장회계 분석방법 비교·분석)

  • Shin, Sukha
    • KDI Journal of Economic Policy
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    • v.36 no.2
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    • pp.137-174
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    • 2014
  • This paper examines whether the TFP growth of the Korean economy slowed down in 2000s based on growth accounting, focusing on how sensitive the results are to the particular aspects of the growth accounting method. There has been no consensus on this issue as the previous studies have provided very diverse results due to the differences in the details of the growth accounting method. Main results of this paper are as follows. First, it is how to calculate the labor income of the self-employed that has the most significant impacts on the estimated TFP growth. Measuring capital stock also matters. Second, the TFP growth of the Korean economy appears to be sustained in 2000s when the extreme assumptions on the labor income of the self-employed are excluded and capital stock is measured by the most frequently-adopted method in the previous studies. For more reliable estimation of the TFP growth, further studies on measuring the labor income of the self-employed are needed.

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