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      • 밀리미터파 발진을 위한 WG모드와 전송선로결합 조건

        김종태,박영석,이영철 경남대학교 공업기술연구소 2000 硏究論文集 Vol.18 No.-

        유전체 공진기중 WG모드가 밀리미터 대역에서 높은 Q값과 저 위상잡음의 특성을 나타내는 가장 적합한 모드로 이용되고 있으므로 본 논문에서는 밀리미터파 발진기를 설계하기 위하여 WG모드의 공진주파수와 공진모드의 해석 및 WG모드와 마이크로스트립선로와의 결합관계를 해석하였다. 모의 실험을 통하여 WG 모드 유전체 공진기를 비유전율이 38인 사파이어를 직경 4mm, 높이 0.225mm, 방위모드수 14로 할 때 77GHz 밀리미터파 발진기를 설계할 수 있음을 보였다. The frequencies of WGM(whispering gallery mode) dielectric resonators which have very high Q factor and low phase noise on the millimeter wave have been used in preference to fundamental mode dielectric resonators. This paper present the physical condition of whispering gallery mode resonance frequency and coupling condition between microstripline and WGM resonator. With a whispering gallery mode sapphire resonator of relative permittivity of 38, we determine the physical size of the diameter 4 mm and the height 0.0225 mm of sapphire and the azimuthal mode number is 14 to design of 77GHz millimeter oscillator.

      • 고음질 오디오를 위한 워터마킹에 관한 연구

        김정태,박종태,이강현 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.2

        In this paper, we proposed the high quality digital audio watermarking algorithm in the frequency domain. The spread spectrum technique is used t o encrypted a stream of information data a s much of the frequency spectrum a s possible. It's by spreading the technique adapt well to data hiding in audio signal. We have used the perceptual model and MDCT/IMDCT for the high quality digital audio watermarking. The proposed watermark algorithm preserved high quality audio data from watermark signal.

      • Wavelet 변환을 위한 부동 소수점 유닛 설계

        김정태,박종태,이강현 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.2

        Introduction of digital communication network, such as ISDN(Integrated Services Digital Networks) and digital storage media have rapidly developed. Due to large amount of image data compression is key techniques, in still image and video using digital signal processing for transmitting and storing The method based DCT(Discrete Cosine Transform) is representative of the image compression. But recently, the image compression using DWT(Discrete Wavelet Transform) is widely studied. FPU is most important in the hardware design for DWT. In this paper, we proposed the high speed FPU(F1oating Point Unit) of DUT encoder for the image compression.

      • KCI등재

        계절상품 판매매출액 시계열의 계절 조정에 관한 연구

        서명율,이종태 한국경영과학회 2003 經營 科學 Vol.20 No.1

        The seasonal adjustment is an essential process in analyzing the time series of economy and business. There are various methods to adjust seasonal effect such as moving average, extrapolation, smoothing and X11. One of the powerful adjustment methods is X11-ARIMA Model which is popularly used in Korea. This method was delivered from Canada. However, this model has been developed to be appropriate for Canadian and American environment. Therefore, we need to review whether the X11-ARIMA Model could be used properly in Korea. In this study, we have applied the method to the annual sales of refrigerator sales in A electronic company. We appreciated the adjustment by result analyzing the time series components such as seasonal component, trend-cycle component, and irregular component, with the proposed method.

      • 블록 암호화를 위한 Blowfish 구현

        성해경,박종태,노진수,이강현 조선대학교 에너지.자원신기술연구소 2002 에너지·자원신기술연구소 논문지 Vol.24 No.2

        Blowfish is a symmetric block cipher that can be used as a drop-in replacement for DES or IDEA. It takes a variable-length key, from 32bits to 448bits, making it ideal for both domestic and exportable use. In this paper, the Blowfish unit is designed using pipeline architecture and correctly implements the algorithm with a focus on ease-of-design and ease-of-use without sacrificing too much speed or size. For the real time process of Blowfish, it is required that high-speed operation and small size hardware. So, the scheme of new adders designed has all advantages abstracted from other adders. As a result of this new adder designed, area cost increases by 1.05 times but the operation speed increases by 1.2 times.

      • 정신분열병 환자에서 사회인구학적 특징과 종교에 따른 정신병 치료방법에 대한 선호도

        이창민,이종일,신경희,이민규,김태현 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.5

        연구목적 : 종교가 정신분열병 치료에 도움을 주기도 하지만 정신병 치료방법에 대한 잘못된 개념을 심어주어 환자의 치료순응도에 나쁜 영향을 미치기도 한다. 그러므로 종교에 따른 정신병 치료방법에 대한 선호도를 조사하여 종교가 정신분열병 치료에 미치는 영향을 알아보고자 이 연구를 시행하였다. 방 법 : DSM-Ⅳ에 의해 진단 받았으며 GAF score가 41이상은 정신분열병 환자 102명을 대상으로 하였다. Allport와 Ross의 내재적-외향적 종교성향척도를 이용하여 종교성향을 설문 조사하였으며 정신병 치료방법(초자연적 치료, 원시적 약물치료, 심리적 치료, 종교적 치료, 생물학적 치료)에 대한 선호도를 설문 조사하였다. 수집된 자료에서 사회인구학적 특성과 종교성향 그리고 정신병 치료방법의 관계를 비교 분석하였다. 결 과 : 1) 정신분열병 환자는 생물학적 치료와 심리적 치료에 가장 높은 선호도를 보였으며 다음으로 종교적 치료와 원시적 약물치료에 높은 선호도를 보였다. 2) 기독교를 믿는 환자군은 종교적 치료에 유의한 선호도를 보인다. 3) 내재적 성향의 환자군이 반종교적 성향의 환자군에 비해 심리적 치료에 유의하게 높은 선호도를 보였다. 그리고 친종교적 성향의 환자는 초자연적 치료, 심리적 치료 그리고 종교적 치료에서 유의하게 높은 선호도를 보였다. 결 론 : 전반적으로 종교성향과 정신병 치료방법은 유의한 상관관계를 보이지 않았다. 그러나 종교성향은 특정한 교리나 사상을 반영하기보다는 개인의 성격을 반영하는 경향이 있으므로 종교과 정신병 치료방법이 전혀 무관하다고 할 수 없다. 환자들은 종교적 치료와 원시적 약물치료에 상당한 선호도를 보이고 있으며 특히, 기독교를 믿는 환자군은 종교적 치료에 유의한 선호도를 보인다. 그러므로 환자와 가족에게 정신분열병에 대한 정신교육을 지속적으로 시행해야 한다고 여겨진다. Objectives : Religion may be beneficial to the treatment of schizophrenia, but religion frequently have bad influence on drug compliance because religion give false concept of the treatment of psychosis. We investigated the influence of religion on the treatment of schizophrenia by assessing the preference for the treatment of psychosis to religion. Methods : 102 patients of schizophrenia who were diagnosed by DSM-Ⅳ and above 41 scores of GAF score were selected. We assessed religious orientation with the Intrinsic and Extrinsic Religious Orientation Scale and assessed the preference for the treatment method of psychosis(supernatural treatment, primitive medicinal treatment, psychological treatment, religious treatment, biological treatment). The relationship among the variables of demographic data, religious orientation, the treatment method of psychosis were analyzed. Results : 1) Schizophrenic patient showed first preference for biological treatment and psychological treatment and they showed second preference for religious treatment and primitive medicinal treatment. 2) Protestant showed preference for religious treatment. 3) Patient group who have intrinsic religious orientation showed more preference for psychological treatment than patient group who have antireligious orientation. Conclusions : Generally the relation between religious orientation and the treatment method of psychosis was not significant. But it couldn't be said that religion and the treatment method of psychosis was not related because religious orientation was not related with religious ideology but was related with personality. Schizophrenic patient showed more preference for religious treatment and primitive medicinal treatment and specifically, protestant showed preference for religious treatment. Therefore, we suggest that it is necessary to give persistent education about schizophrenia to patients and their family.

      • SCIESCOPUSKCI등재

        Development of Biodegradable Methoxy Poly(ethyleneglycol)-polyesters Diblock Copolymers as Drug Carrier for Implantable Disc

        ( Jong Tae Ko ),( Jae Ho Lee ),( Jong Min Kim ),( Moon Suk Kim ),( John M. Rhee ),( Hai Bang Lee ),( Gil Son Khang ) 한국조직공학과 재생의학회 2006 조직공학과 재생의학 Vol.3 No.2

        The main objective of this study is to investigate the feasibility of methoxy polyethyleneglycol (mPEG) and poly(D,L-lactide-co-glycolide) (PLGA) or poly(ε-caprolactone) (PCL) diblock copolymers as implantable drug carriers. A series of diblock copolymers were synthesized by ring-opening polymerization with different molecular weight of mPEG. 1H-NMR, FT-IR, XRD and GPC were used to characterize the obtained various diblock copolymers. The fabricated dexamethasone-loaded discs were incubated at 37 oC in phosphate buffer saline (PBS, pH 7.4) and the effects of composition on the degradation rate of discs were examined by water absorption, mass loss, pH variation of in vitro media and composition changes using SEM, FT-IR, respectively. The in vitro rate of drug-loaded mPEG-PLGA, mPEG-PCL implantable discs depended on their composition, increasing when the mPEG molecular weight of diblock copolymers increased. Water absorption and mass loss of mPEG-PLGA copolymer discs as drug carrier seems to be more affected on mPEG molecular weight than mPEG-PCL copolymers. Also, the variation of pH of PBS as in vitro media was changed by cleavage of ester bond by hydrolysis. These results indicate that pH of PBS was faster decreased with increasing of mPEG molecular weight in the all copolymers. It can be expected that optimized copolymer composition and molecular weight may be providing further application as the implantable drug carrier for different drugs in controlled drug delivery system.

      • SCOPUSSCIEKCI등재

        Cranial Hemophilic Pseudotumor : Case Report

        Park, Jong Tae,Kim, Gook Ki,Lim, Young Jin,Kim, Tae Sung,Rhee, Bong Arm,Leem, Won 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.8

        혈우병성 위종양은 심한 혈우병 환자에 있어서 1% 내지 2% 정도 발생되는 드문 합병증으로 근육 또는 골조직내의 반복적인 출혈에 의해 형성된 낭포성 팽윤이 점진적으로 통증 없이 진행하여 인접 골까지 변화를 초해하는 질환으로 주로 하지의 장골, 골반 및 수족 골에서 발생한다. 저자 등은 응고검사상 Ⅶ 인자 결핍으로 혈우병 진단 받고 치료해 온 22세 남자 환자에서 내원 2년 전에 외상을 수상하였으며 우측 후두염부위에 위종양 소견 보여 외과적 적출술을 시행하여 치험한 1예를 경험하였기에 문헌 고찰과 함께 이를 보고하는 바이다. Hemophilic pseudotumor is an uncommon but characteristic complication of hemophilia occurring in 1% to 2% of individuals with a severe factor Ⅷ or Ⅸ deficiency Most of these lesions are located in the long bones and the pelvis The authors describe a case of cranial hemophilic pseudotumor in a patient who presented with symptoms of headache and palpable mass on the occipital area He was a 22 years old man with a two year history of severe factor Ⅷ deficiency.

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