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광대역 고이득 응용을 위한 단일요소 자기-전기 다이폴 안테나
윤수정(Su Jeong Yun),이가현(Ka Hyeon Lee),이정남(Jung-Nam Lee),조영균(Young-Kyun Cho) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.6
본 논문에서는 넓은 대역폭과 높은 이득을 갖는 단일요소 자기-전기 다이폴 안테나를 제안하였다. 제안된 안테나는 두 개의 금속판 연결을 통해 전기 다이폴의 매칭 주파수를 조절하여 대역폭을 개선하고, 금속 벽과 다이폴 안테나 사이의 간격 조절을 통해 자기 다이폴의 전류 분포를 변화시킴으로써 이득을 향상시킬 수 있다. 이러한 단일요소 안테나의 성능 개선은 제안된 안테나가 배열 형태로 구성되었을 때 더욱 높은 성능 지표를 기대할 수 있게 한다. This paper presents a single element magneto-electric dipole antenna that ensures a wide-bandwidth and high-gain. The return loss characteristics of the proposed antenna is improved by adjusting the matching frequency of the electric dipole through the connection of two metal plates. The realized gain of the antenna is enhanced by altering the current distribution of the magnetic dipole, which is changed by adjusting the distance between the metal wall and the dipole antenna. With these features, a higher performance array antenna for Ka-band can be achieved.
이가영,박태진 인제대학교 지역사회의학연구소 1998 硏究論文集 Vol.5 No.-
Backgrounds: This study was performed to find the relationship of health behaviors and physical health status in the elderly. Therefore, we evaluated the significance of health behaviors and to get the useful data of the health promotion in the elderly. Methods: The elderly 65-years old or over were recruited and enrolled at a medical service practiced in 8 different rural areas in 1997. A total of 217 completed questionnaires were obtained. The questionnaire consisted of the variables of sociodemography, health behavior, physical health status, health concern, and depression. The data were analysed by Mantel-Haenszel test for linear association, t-test, ANOVA, and multiple regression analysis. Results: Eating breakfast and physical activity among the health behaviors were related to physical health status. The level of practicing health behavior was related to physical health status, especially to the admission history , and disability in work because of the illness. The predictors of health status score were health concern and total health behaviors. Only physical activity among the health behaviors was the significant predictor of physical health status. Conclusions: The result that health behaviors are related to health status in the middle-aged is applicable to the elderly. And physical activity is the predictor of physical health status in the elderly. These results suggest health behaviors will be helpful to the elderly's health.
설치류 뇌에서 c-Fos를 이용하여 삼투조절과 관련된 신경회로의 규명
이영기,박덕배,장가용 제주대학교 생명과학연구소 2000 제주생명과학연구 Vol.3 No.-
본 연구는 생쥐의 중추신경계통에서 고장액에 반응하여 c-Fos에 대한 면역양성을 나타내는 지역을 규명하고자 수행하였다. c-Fos의 발현은 면역조직화적으로 검출하고 신경세포의 활성화에 대한 표식자로 이용하였다. 고장액은 생쥐 뇌의 supraoptic nuclus, median preoptic nucleus organum vasculosum lamina terminalis, sufornical organ, locus coeluleus, nucleus of solitary tract, ventrolateral medulla, parabrachial nucleus 등에서 발현되었다. 특히 retrochiasmatic area의 배쪽 부분에서 많은 c-Fos면역양성의 세포가 관철되었으며, 시상하부의 paraventricular nucleus나 두뇌의 area postrema에서는 c-Fos면역양성세포가 거의 관철되지 않았는데 이들 지역들은 흰쥐에서는 다수의 c-Fos면역양성 세포가 나타나는 지역이다. 이상의 결과들은 생쥐에서 고장액이에 의해 c-Fos면역양성 세포가 나타나는 지역은 흰쥐에서와는 일부 상이한 결과를 보여주는 것으로 나타났다. Experiments were carried out on adult mouse to investigate the regional localization of the cells inducing c-Fos immunoreactivity in central nervous system in response to hypertonic saline(HS). c-Fos induction, detected immunohistochemically, was regarded as a marker for neuronal activation. Intraperitoneal injection of HS resulted in dense c-Fos-like immunoreactivity (FLI) in several forebrain and brainstem area. These areas include the supraoptic nucleus(SON), median preoptic nucleus (MnPO), organum vasculosum lamina terminalis(OVLT), subfornical organ(SFO), locus coeruleus(LC), nucleus of solitary tract(NTS), ventrolateral medulla(VLM), and parabrachial nucleus(PBN). In particular, the ventral region of retrochiasmatic area showed numerous and very intensely labeled FLI cells. No FLI or few FLI cells were, however, detected in the hypothalamic paraventricular nucleus (PVN) and the area postrema(AP) respectively, the regions which revealed very intensive FLI in rat after HS treatment. These data suggest that FLI induced in response to osmotic stimuli in the mouse brawn has a different regional distribution from that of rat brain.
김가현,이승휘,서진호,민일규,이영재 동아대학교 건설기술연구소 2000 硏究報告 Vol.24 No.1
Where no records are available at a site, a preliminary estimate may be made from relations between floods and catchment characteristics. Anumber of these characteristics were chosen for testing and were measured for those catchments where mean annual flood estimates were available. Although the improvement using extended data in regression of flood estimates on catchment characteristics was small, this may be due to the limitations of the regression model. When an individual short term record is to be extended, more detailed attention can be given; an example is presented of the technique which should be adopted in practice, particularly when a short term record covers a period which is known to be biassed. A method of extending the peaks over a threshold series is presented with a numerical example. The extension of records directly from rainfall by means of a conceptual model is discussed, although the application of such methods is likely to be limited by lack of recording raingauge information. Methods of combining information from various sources are discussed in terms of information from catchment characteristics supplemented by records, but are generally applicable to different sources of information. The application of this technique to estimating the probable maximum flood requires more conservative assumptions about the antecedent condition, storm profile and unit hydrograph. It is suggested that the profile and catchment wetness index at the start of the design duration should be based on the assumption that the estimated maximum rainfall occurs in all durations centered on the storm peak.
김동찬,김영준,마원,김충희,노경식,이가영 경희대학교 부설 디자인연구원 2008 예술· 디자인학연구 Vol.11 No.1
Kyung-Hee University Global Campus accepted changing of education environment to adapt to the World's information technology society so that school has been preparing the Master plan to grow up campus's vision since 2007. However, realization of the Master plan need a lot of financial resources, much times and phases in improvement. Especially, our university needs symbolized business in 2009 due to the 60th anniversary of our university. Based on this we want to improve the main entrance road environment from school gate to the school of international management and reconstruct the spatial environment beside the main road. The purpose of this research is to construct a pedestrian space environment and reconstruct the campus environment which adapt to the new times' demands. That is why the Master plan is trying to find the landscape scenic which adapts to our school' s main entrance space and the improvement method about the pedestrian space of the Global campus to congratulate of our university's 60th anniversary.