프로그램화 된 신체운동이 ADHD 아동의 주의산만행동과 과잉행동에 미치는 효과

최재원(Jae Won Choi),강경두(Kyoung Doo Kang),정혜연(Hye Yeon Jung) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.47

The purpose of this study is to deeply analyze a change of the programmed physical exercise in attentiondeficient behavior and hyperactivity of children with ADHD, through the single-subject research design method. The research subjects were 4 elementary school students who are under being cured due to being judged to be ADHD at Child Psychiatric Clinic for C University Hospital where is located in Seoul at that time of beginning experiment in order to be conformed with the objective of research. For visual observation, the attention-deficient behavior was used the frequency-typed case sampling method(Shin So-yeon, Park Jaeguk, Kim Yeong-mi, Lee Hwa-eun, 2007). Observation of hyperactivity was used the contents, which Carlson and Hotfield(1991) defined, by referring to the contents by Mun Jae-gyeong(1998). The following are the results that were elicited through the research procedure of this study. First, the programmed physical exercise was indicated to reduce attention-deficient behavior in children with ADHD. Second, the programmed physical exercise was indicated to reduce hyperactivity in children with ADHD.

폐렴구균 감염에 의한 복부 대동맥류 1예

최소연,백경란,기현균,문치숙,오원섭,송재훈,신동현,위유미,고영혜 대한감염학회 2005 감염과 화학요법 Vol.37 No.2

폐렴구균은 폐렴, 수막염, 중이염 등의 감염증을 일으키나 감염성 대동맥류를 유발하는 경우는 매우 드물다. 저자들은 고혈압, 당뇨병 등을 가지고 있으며 대동맥류가 확인되지 않았던 78세 남자 환자에서 감염증의 증상없이 대동맥류 파열로 내원하여 폐렴구균에 의한 대동맥류로 진단되었던 증례를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Streptococcus pneumoniae has been an important etiologic agent of community-acquired pneumonia, meningitis, and otitis media. S. pneumoniae is also an important cause of bacteremia, especially in a community setting and it may cause intravascular infection. S. pneumoniae has been rarely been reparted to cause mycotic aneurysm and three is no case report on abdominal aneurysm caused by S. pneumoniae in Korea, yet. We experienced a case of abdominal aneurysm caused by S. pneumoniae infection. A 78-year old male with hypertension and diabetes mellitus was transferred to our hospital due to ruptured abdominal aortic aneurysm. Surgical intervention was done for removal of hematoma and vascular anastomosis. Ascending aorta showed atheromatous plaque with dystrophic calcification and thrombus. S. pneumoniae was isolated from the culture of the surgical specimen. After successful treatment with antibiotics for 7 weeks, he has been followed up uneventfully in outpatient clinic for 1 year.

RFID 수동형 태그의 결합방식 고찰

최재연 남서울대학교 2007 남서울대학교 논문집 Vol.13 No.4

The antenna emits radio signals to activate the tag and to read and write data to it. Antennas are the conduits between the tag and the transceiver, which controls the system's data acquisition and communication. Antennas are available in a variety of shapes and sizes. RFID tags are categorized as either active or passive. Active RFID tags are powered by an internal battery and are typically read/write, i.e., tag data can be rewritten and/or modified. Passive RFID tags operate without a separate external power source and obtain operating power generated from the reader. Passive tags are consequently much lighter than active tags, less expensive, and offer a virtually unlimited operational lifetime. The coupling method between passive tag and the reader is considered. Key Words : RFID, tag, reader, passive tag coupling

차세대 통신을 위한 소프트웨어 무선통신 기술

최재연 남서울대학교 2007 남서울대학교 논문집 Vol.13 No.3

A software-defined radio (SDR) system is a radio communication system which can tune to any frequency band and receive any modulation across a large frequency spectrum by means of programmable hardware which is controlled by software. An SDR performs significant amounts of signal processing in a general purpose computer, or a reconfigurable piece of digital electronics. The goal of this design is to produce a radio that can receive and transmit a new form of radio protocol just by running new software. The hardware of a software-defined radio typically consists of a superheterodyne RF front end which converts RF signals from analog IF signals, and analog to digital converter and digital to analog converters which are used to convert a digitised IF signal from and to analog form, respectively. Software-defined radio can currently be used to implement simple radio modem technologies. In the long run, software-defined radio is expected by its proponents to become the dominant technology in radio communications. It is the enabler of the cognitive radio. This paper introduces the Software defined radio technology for the next generation communication system. Key Words : Software defined radio, wireless communication

Coherent 신호 검출기의 오류확률 성능 분석

최재연 남서울대학교출판국 2011 남서울대학교 정보통신 논문집 Vol.8 No.1

신호를 검출하는 방식은 비동기 방식과 동기 방식으로 나뉜다. 비동기 방식은 구성이 간단하지만 성능 개선에 제약을 받는다. 따라서, 일반적으로 성능을 중요시하는 시스템은 구조가 복잡하더라도 동기식 신호 검출법을 사용한다. 동기식 신호 검출은 신호의 존재 유무를 확인하는 것과 신호의 종류를 판별하는 것으로 나뉜다. 본 논문에서는 동기식 신호 검출 방식을 이용하여 신호의 존재 유무와 신호의 종류를 판별하고 이에대한 성능을 평가한다. Key Words : Coherent, Signal Detection, Pulse repetition, Wavelet

대칭/비대칭 브로드사이드 결합전송선의 특성 해석

최재연 남서울대학교 1997 남서울대학교 논문집 Vol.3 No.-

The broadside coupled coplanar waveguide(BCCPW) shielded with the rectangular waveguide is analyzed by applying the Galerkin's method in the spectral domain. Characteristic parameters are obtained respectively when BCCPW is symmetric and unsymmetric with regard to the suspended dielectric substrate. Characteristic impedances and effective dielctric constants of BCCPW are also obtained by varying the height of the dielectric substrate and the width of the center and the ground strip in terms of transmission modes.

움직임을 기반으로 한 비디오 인덱싱과 검색

최연성,이재현 群山大學校 1995 論文集 Vol.22 No.-

Video should be segmented into shots to be used for identification and indexing. Various changes may happen within a single shot such as related to camera operations, object movements, flashes, etc. Thus we propose a new cut detection technique based on linear correlation coefficients of interframe motion vectors. And this paper also proposes a new video indexing method that uses motion vectors and representative colors to identify video sequences. The index is based on the identification of discrete cut points and camera operations made possible by analyzing motion vectors.

TEM 혼 안테나용 임피던스 변환 특성 해석

최재연 남서울대학교 2010 남서울대학교 논문집 Vol.16 No.2

In this study, impedance transformation characteristic for the broadband TEM horn antenna is analyzed. The moment method can be applied to analyze the TEM horn antenna. The balun feeding the TEM horn is needed for impedace matching between antena which is balanced circuit and coaxial cable which is unbalanced circuit. The balun is composed of the Lange coupler with the two-stage cascaded connection and the impedance transformer designed by the short-linear matching method and the linear double taper method. At the antenna operating at the frequency band , 1.5 - 3 GHz, the measured data agree well with the calculated results. Key Words : impedance transformation, TEM, horn antenna

다층 구조의 전자파 흡수 유전체 해석

최재연 남서울대학교 2010 남서울대학교 논문집 Vol.16 No.1-1

Microwave application development has made it necessary to conceive special materials capable of highly absorbing such radiation. An experimental multi-layer active microwave absorber in described. The absorber is a planar structure which is analyzed by modified Powell's method. In case of four dielectric layers with inequality constraints in design variables. The optimal radar absorbing materials' are designed by setting the relative permittivity and the loss tangent of the dielectrics as a function of the frequency over 5~20GHz. Key Words : Absorber, active, adaptive, Powells' method

다발성 간종괴의 형태로 나타난 특발성 과호산구 증후군 치험1예

최승오,연규민,이승민,김순제,왕준호,박형석,이재동,진춘조,이창훈,신현준,김정은 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-

Hypereosinophilic syndrome is characterized by persistent blood eosinophilia of 1,500/ul or more in the absence of known causes and multiorgan dysfunction by eosinophil-related tissue damage. In Korea, some cases of hypereosinophilic syndrome with hepatic involvement have been described with prolonged benign clinical courses. Most of them were diffuse or multifocal lesions in imaging studies, and a few case presenting as a single mass has been described. Here we report a case of hypereosinophilic syndrome with hepatic involvement in a 65-year-old man who presented with multifocal mass lesions. By abdominal US and CT scan, multiple, ill-defined nodules were detected in throughout the liver. Liver biopsy revealed severe eosinophilic hepatitis, suggestive of hypereosinophilic syndrome. Hepatic mass lesions improved after steroid administration for several weeks.