• Title, Summary, Keyword: BMWS

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Development of the Korean Version of the Brief Measure of Worry Severity(BMWS) (한국어판 간이걱정척도의 개발)

  • Lim, Jae-Hyoung;Joe, Sook-Haeng;Han, Chang-Su;Kim, Seung-Hyun;Yang, Jae-Won;Lee, Moon-Soo;Jeong, Hyun-Ghang;Ko, Young-Hoon
    • Korean Journal of Psychosomatic Medicine
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    • v.19 no.2
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    • pp.92-100
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    • 2011
  • Objectives:We developed a Korean version of the Brief Measure of Worry Severity(BMWS), and examined its reliability, validity, and factor structures. We also explored the associations of pathological worry with depression and anxiety. Methods:Three hundreds fifty-two subjects including community population and college students completed the BMWS, and 27 subjects repeated the scale three weeks later. Reliability was assessed by Cronbach's coefficient ${\alpha}$ and test-retest correlation. The external validity was examined by the correlation of the BMWS score with the scores of Beck Depression Inventory(BDI), Patient Health questionnaire-2(PHQ-2), State Anxiety Inven-tory(SAI), and Trait Anxiety Inventory(TAI). And principal component analysis was performed to evaluate the construct validity. The associations of pathological worry with depression and anxiety were explored using partial correlation analysis. Results:Cronbach's coefficient ${\alpha}$ for the BMWS was 0.904 and test-retest correlation was 0.56(P<0.01). The Spearman correlation coefficients of the BMWS score with the scores of BDI, PHQ-2, SAI, and TAI were 0.60(P<0.01), 0.42(P<0.01), 0.36(P<0.01), and 0.59(P<0.01), respectively. The BMWS showed unifactorial construct. When controlling for TAI score, the correlation coefficient between the BMWS score and the BDI score was 0.357(P<0.01), and when controlling for BDI score the correlation coefficient between the BMWS score and the TAI score was 0.446(P<0.01). Conclusion:The Korean version of the BMWS was found to be a reliable and valid questionnaire for measuring pathological worry. And we could identify the associations of the pathological worry with depression as well as anxiety.

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A Slot Away Antenna with a Simple Feed Structure for Broadband Multimedia Wireless Applications (단순한 급전 구조를 갖는 Broadband Multimedia Wireless System(BMWS)용 슬롯 배열 안테나)

  • 성영제;이정수;오순수;문종용;최원규;표철식;최재익;김영식
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.14 no.3
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    • pp.209-216
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    • 2003
  • We design and fabricate slot array antenna for BMWS(Broadband Multimedia Wireless System) applications. This paper presents a simple feed structure, which consists of two horns and a parallel-plate waveguide, because antennas operating at 40.5 GHz~43.5 GHz have considerable feeding losses. The simple feed structure has the advantages of high-efficiency and mass-production. The fabricated antenna has a gain of 25.8 dBi with a sidelobe level below -18 ㏈ and a 3 ㏈ beamwidth of approximately 3$^{\circ}$ in the E-plane. In case of H-plane, a 3 ㏈ beamwidth is 17$^{\circ}$ and a sidelobe level is suppressed to below -27 ㏈. The experimental results are in good agreement with the simulation results. The authors expect that narrow 3 ㏈ beamwidth is obtained by combining a few proposed slot array antennas in parallel.

Beam Steering Antenna using Rotman Lens for BMWS Application (Rotman 렌즈를 이용한 BMWS용 빔 제어 안테나)

  • 오순수;성영제;이정수;이종문;표철식;김응배;김영식
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.13 no.9
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    • pp.865-872
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    • 2002
  • The conventional Rotman lens antenna using a waveguide lens has the bended waveguide from the inner lens contour to the antenna element. However in this paper the improved Rotman lens antenna having a straight waveguide is proposed. By applying this technique, the beam steering antenna for BMWS application which has 3 input ports and 6 antenna elements consisted of open-ended waveguide has been designed and fabricated. From the measurement, the gain of the beam steering antenna is 15.4 ~ 17.2 dB. The direction angle is 0$^{\circ}$, +14$^{\circ}$~ +16$^{\circ}$, -15$^{\circ}$~ -16$^{\circ}$ and the side lobe level is -l0 ~ 20 dB.