• 한국전자파학회논문지
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• 제23권2호
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• pp.251-257
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• 2012

인체 통신이란 사람의 몸통이나 피부를 전송 매질로 하여 데이터를 송수신하는 통신 방식을 의미한다. 본 논문에서는 인체 피부 표면에 닿아 있는 자유 공간을 전송 매체로 하여 데이터를 전달하는 전송 방식에 대하여, 10~30 MHz 주파수 범위에서 5 MHz 간격으로 5개의 주파수에 대하여 송수신부 사이의 전기장 분포에 대하여 수치 해석하였다. 채널 손실 계산은 총 29종의 조직으로 구성되어 있는 한국형 남성 표준 인체 모델에 상용의 툴을 사용하여 실행하였다. 계산 주파수에 따른 인체 조직의 도전율과 비유전율을 해석 파라미터로 입력하여 송수신부로 간주되는 손등 위에서 전기장 분포를 계산하였다. 손등에 부착된 송신기에 의한 전자파비(比)흡수율(SAR: Specific Absorbtion Rate) 값을 계산한 후, 국제비전리복사방호위원회(ICNIRP: International Commission on Non-Ionizing Radiation Protection) 인체 보호 기준과 비교하였다. 또한, 수치 해석으로 구한 전기장을 선(線)적분하여 인접한 극판들 사이의 전압들을 계산하였고, 송신부와 수신부의 전압의 비(比)를 채널 손실로 정의하였다. 수치 해석 결과, 10~30 MHz 주파수 대역에서 채널 손실의 범위는 약 ($75{\pm}1$) dB로 주파수에 따른 채널 손실의 변화가 크지 않았다.

• 한국재료학회지
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• 제4권6호
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• pp.687-694
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• 1994

선택적 LPE방법을 이용하여 (111)B GaAs 기판 상에 InP연속 박막을 성장하고 그 특성을 평가하였다. 적정 LPE성장조건으로 성장온도 $660^{\circ}C$, 과냉도 $5^{\circ}C$, 냉각속도 $0.4^{\circ}C$/min였으며, 연구된 온도 범위에서 성장온도가 증가할수록 표면형상이 개선되었고 ELO의 넓이가 증가하였다. Seed방향이 <112>방향에서 110-160$\mu \textrm{m}$ 정도의 최대 ELO 넓이가 얻어졌으며 60-80$\mu \textrm{m}$정도의 마스크 간격에서 연속박막을 용이하게 성장할 수 있었다. LPE 성장초기에 기판 용해 현상이 발생하였으며 이에 따라 성장박막의 조성이 대략 $In_{0.85}Ga_{0.15}$As$_{0.01}P{0.99}$으로 변화하고 InP/GaAs계면 및 박막 표면형상이 거칠어졌으나 기판의 성장 부위가 제한됨에 따라 통상적인 LPE박막에 비교하여 매우 개선된 표면형상을 얻을 수 있었다. 두개의 성장융액을 이용하여 1차 박막성장 후 다시 InP 박막을 성장하는 2단성장 방법을 사용하여 순수한 InP/GaAs박막을 성장할 수 있었으며 단면 TEM분석 결과 SLPE성장박막으로 전파하는 활주전위는 산화막 마스크에 의해 효과적으로 차단됨을 알 수 있었다.

• 한국조경학회지
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• 제18권4호
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• pp.45-71
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• 1991

The landscape systems in Korean island settlements can be recognized as results of ingabitants' ecological adptation to the isolated environment with the limited natural resources. Both the fishery dominant industry in island society and ecological nature of its environments seem to have influenced on inhabitants' environmental cognition as well as the physical landscape of island villages such as its location, spatial pattern in each village, housing form and so on. This study was done mainly by both refering to the related documents and direct observations in case study areas, and results of the study can be summarized as follows. 1. In general, the landscape of an individual island seems to take more innate characteristics of island's own, corresponding to the degree of isolation from mainland. That is, while the landscape of island in neighboring waters takes both inland-like and island-innate landscape character at the same time, the one in the open sea far from land takes more innate landscape character of all island's own in the aspects of village location, land use and housing density etc. 2. The convex landform of most islands brings about more centrifugal village allocation than centripetal allocation in most inland villages. And thus most villages in each island face extremely diverse directions different from the south facing preference in most inland rural villages. 3. Most island villages tend to be located along the ecologically transitional strip between land and sea, so called 'line of life', rather than between hilly slope and flat land as being in most inland village locations. So they are located with marine ecology bounded fishing ground ahead and land ecology bounded agricultural site at the back of them. 4. The settlement pattern of the island fishing villages shows more compact spatial structure than that of inland agricultural villages, due to the absolute limits of usable land resources and the adaptation to the marine environment with severe sea winds and waves or for the easy accessability to the fishing grounds. And also the managerial patterns of public owned sea weed catching ground, which take each family as the unit of usership rather than an individual, seem to make the villagescape more compact and the size of Individual residence smaller than that of inland agricultural village. 5. The folk shrine('Dand') systems, in persrective of villagescape, represent innate environmental cognition of island inhabitants above all other cultural landscape elements in the island. Usually the kinds and the meanings of island's communal shrine and its allocative patternsin island villagescape are composed of set with binary opposition, for example 'Upper shrine(representing 'earth', 'mountain' or 'fire')' and 'Lower Shrine(representing 'sea', 'dragon' or 'water') are those. They are usually located at contrary positions in villagescape each other. That is, they are located at 'the virtical center or visual terminus(Upper shrine at hillside behind the village)' and 'the border or entrance(Lower Shrine at seashore in front of the village)'. Each of these shirines' divinity coincides with each subsystem of island's natural eco-system(earth sphere vs marine sphere) and they also contribute to ecological conservation, bonded with the 'Sacred Forest(usually with another function of windbreak)' or 'Sacred Natural Fountain' nearby them, which are representatives of island's natural resources.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2001년도 봄 학술발표회 논문집
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• pp.167-174
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• 2001

Reflection method using ultrasonic source has been attempted to obtain the information about tunnel lining structures composed of lining, shotcrete, water barrier and voids at the back of lining. In this work, two different types of sources, i.e. single-pulse source and sweep source, can be used. Single-pulse source with short time duration has the frequency content whose amplitudes tend to be concentrated around the dominant frequency, whereas sweep source with long time duration denotes a flat distribution of relatively larger amplitude over a broad frequency band, although the peak to peak amplitude of single-pulse source wavelet is equivalent to that of sweep source one. In traditional seismic application, a single-pulse source(weight drop, dynamite) is typically used. However, to investigate the fine structure, as it is the case in the tunnel lining structure, the sweep wavelet can be also a desirable source waveform primarily due to the higher energy over a broad frequency band. For the investigation purposes of sweep source, a physical modeling is a useful tool, especially to study problems of wave propagation in the fine layered media. The main purpose of this work was using a physical modeling technique to explore the applicability of sweep source to the delineation of inner layer boundaries. To this end, a two-dimensional physical model analogous to the lining structure was built and a special ultrasonic sweep source was devised. The measurements were carried out in the sweep frequency range 10 ∼ 60 KHz, as peformed in the regular reflection survey(e.g. roll-along technique). The measured data were further rearranged with a proper software (cross-correlation). The resulting seismograms(raw data) showed quitely similar features to those from a single-pulse source, in which high frequency content of reflection events could be considerably emphasized, as expected. The data were further processed by using a regular data processing system "FOCUS" and the results(stack section) were well associated with the known model structure. In this context, it is worthy to note that in view of measuring condition the sweep source would be applied to benefit the penetration of high frequency energy into the media and to enhance the resolution of reflection events.

• 한국의류산업학회지
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• 제13권4호
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• pp.600-613
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• 2011

The purpose of this study is to provide Torso pattern for Korean middle-aged women using 3D human body scan data. 155 women in their 40's or 50's were measured by Martin's anthropometry. Merging the data of 914 middle aged women provided by Korean agency for technology and standards, total of 1,069 subjects' data were analyzed. For data analysis, ANOVA, factor analysis and cluster analysis were done using SPSS PC+. And representative subject of each cluster was selected and they participated in 3D scanning and Torso pattern suggested for middle-aged women Torso pattern which investing the amount of ease according to each group for diffuse front interscye 30%, armscye circumference 30%, back interscye 40% using 3D human body scan data. The results of this study are as follows. Firstly, as a result of the factor analysis, the first factor was 'obesity index of body', The second factor was 'verticality size of body', The third factor was 'verticality length of upper bodice', The fourth factor was 'drop value to represent silhouette', and the fifth factor was 'physique of upper bodice'. And, middle-aged women type were classified 3 types according to the cluster analysis. Type 1(Y-type) was the long upper Torso with wide shoulder. Type 2(H-type) was flat-body type with comparatively thin upper bodice and thin lower bodice. And type 3(A-type) was the obese type with comparatively thin upper bodice and fat lower bodice. Secondly, using CAD program, point filtering was performed and approximated surface model was made. It used that generated surface smoothing corrected for abnormally extruded points and scattered points based on the curvature information. And 3D surfaces were flatted onto the plane by the internal tools of CAD program. Difference ratios of outline length and area between 3D curves and 2D plane were 0.42% and 0.54%, respectively. Third, wearing test by the sensory evaluation showed that distinct difference almost every category. The movement functionality test shows that, in all the tests which reveal significant differences, especially, 'comparison pattern A' experienced inconvenience to neck width and neck depth.

• 복식
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• 제1권
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• pp.101-117
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• 1977

This thesis is a study of the Simui(深衣) system which was a dress regulation peculiar to old China with skirt and coat. The origin of Simui is a very long time, that is, before Ju dynasty in China. Its wearing range had a large circle irrespective of rank and good or bad luck. This was a ordinary dress to the Emperor or the lords, a below court attire or a below sacrificial rites attire to the illustrious officials, and good luck dress to the common people. But this was a funeral rites attire or coming-of-age ceremony attire in domestic behaviour. In the times of Song dynasty, lots of confucian scholars had put on this simui because of Juhi's recommendation for domestic behaviour. This Simui had been put on through all the times of China and was the original text of all the dress. Especially the court attire and silkworm working dress of Empress, and the court attire and underwear court attire of Emperor is also made out of this Simui, therefore this is a origin of the ceremonial dress which formed into long coat. In Korea it is said that this Simui was brought in prior to the middle of Goryeo dynasty. But we can't tell the correct transmitted age. According to the following records in Goryeo History, "King had put on the Simui as a sacrificial rite attire in the times of Yejong". It is sure that this Simui was brought in prior to the times of Yejong. In fact, lots of confucian scholars had put on the Simui since the introduction of confucianism in the end of Goryeo dynasty and after that time this was taken by many confucian scholars through Yi dynasty. Korean Simui system was complied with Chinese system through confucian domestic behaviour, This was respected for court dress of confucian scholars, as it were, Chumri, (an ordinary dress of scholars), Nansam (a uniform of upper student), and Hakchangui (a uniform of confucian student). There are many deta about Simui system in the book of Yeki, chapter Okcho and Simui, and other many canfucian books. But we didn't demonstrate the theory about it till now. Especially there are diversifies of opinions about the phrase of "Sok Im Ku Byun" in Yeki. Simui was cut in separate and then was stitched together in one piece. Generally its shape had round sleeve and angled lapel, its length reaches to the anklebone. And it has a line around the lapel, the sleeve band, and the edge of skirt. It is called Simui because the body can be wrapped deeply in broad width and large sleeve. The Simui was made of white fine linen and was cut by the natural size of body. Every part of Simui had a profound meaning; the round sleeve in compliance with regulation can keep a courtesy when a walker moves his hands and the angled lapel like a carpenter's square in compliance with square keeps them front loosing their Justice and a string of the back also keeps them loosing from their righteousness and the flat lower part of Simui makes their heart and mind calm. This Simui was usually attendant on a head cover and belt made cloth, and black shoes. This thesis was made a study of documents and portrait from Yi dynasty, for the actual object was not obtained.

• 한국운동역학회지
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• 제16권2호
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• pp.1-8
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• 2006

The purpose of this study was to evaluate normalized jerk according to shoes, slope, and velocity during walking. Eleven different test subjects used three different types of shoes (running shoes, mountain climbing boots, and elevated forefoot walking shoes) at various walking speeds(1.19, 1.25, 1.33, 1.56, 1.78, 1.9, 2, 2.11, 2.33m/sec) and gradients(0, 3, 6, 10 degrees) on a treadmill. Since there were concerns about using the elevated forefoot shoes on an incline, these shoes were not used on a gradient. Motion Analysis (Motion Analysis Corp. Santa Rosa, CA USA) was conducted with four Falcon high speed digital motion capture cameras. Utilizing the maximum smoothness theory, it was hypothesized that there would be differences in jerk according to shoe type, velocity, and slope. Furthermore, it was assumed that running shoes would have the lowest values for normalized jerk because subjects were most accustomed to wearing these shoes. The results demonstrated that elevated forefoot walking shoes had lowest value for normalized jerk at heel. In contrast, elevated forefoot walking shoes had greater normalized jerk at the center of mass at most walking speeds. For most gradients and walking speeds, hiking boots had smaller medio-lateral directional normalized jerk at ankle than running shoes. These results alluded to an inverse ratio for jerk at the heel and at the COM for all types of shoes. Furthermore, as velocity increased, medio-lateral jerk was reduced for all gradients in both hiking boots and running shoes. Due to the fragility of the ankle joint, elevated forefoot walking shoes could be recommended for walking on flat surfaces because they minimize instability at the heel. Although the elevated forefoot walking shoes have the highest levels of jerk at the COM, the structure of the pelvis and spine allows for greater compensatory movement than the ankle. This movement at the COM might even have a beneficial effect of activating the muscles in the back and abdomen more than other shoes. On inclines hiking boots would be recommended over running shoes because hiking boots demonstrated more medio-lateral stability on a gradient than running shoes. These results also demonstrate the usefulness of normalized jerk theory in analyzing the relationship between the body and shoes, walking velocity, and movement up a slope.

• 한국운동역학회지
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• 제19권2호
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• pp.297-309
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• 2009

이 연구에서는 피칭웨지 스윙 시 족저압력 측정기를 이용하여 평지, 오르막 내리막경사면에서의 족저압력분포의 메카니즘을 분석하여 운동역학적인 기초자료를 제공하고자 피험자는 KPGA 3명, KLPGA 3명을 대상으로 족저압력분포를 측정한 후 스윙시간, 동작특성, 평균족저압력 그리고 최대족저압력을 분석한 결과 경사면의 형태변화에 따른 스윙동작 시 구간별 시간변인과 족저압력변인들을 종합적으로 분석 결과 경사면에서의 스윙동작은 백스윙 과정에서 하지의 코일링 동작을 방해하는 요인이 될 수 있으며, 다운스윙과정에서도 체중분산을 최소화시키는 하지의 블로킹 동작과 이 후 릴리스 동작에도 부정적인 영향을 미치는 것으로 분석되었다. 또한 경사면은 스윙동작에 영향을 미칠 수 있는 많은 외적 요인들 중의 하나인데, 오르막경사면에서의 어드레스 자세는 하지의 움직임을 제한하기 때문에 약간 좁은 스탠스를 유지하고, 내리막경사에서는 반대로 하지의 더 큰 활동성을 막기 위하여 더 넓은 스탠스를 가져야 할 것으로 판단되며, 어드레스 자세에서 뿐만 아니라 오르막경사의 다운스윙 동안에도 가능한 신체균형을 유지시키기 위하여 체중을 왼발에 두어야 할 것으로 판단된다.

• 대한전자공학회논문지
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• 제16권4호
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• pp.36-46
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• 1979

본 연구에서는 N -채널 실리콘 게이트 제작기술에 의하여 일련의 크기를 가지는 커페시터와 트렌지스터들이 제작되었다. 그 결과 다양한 이온 주입 조걸, 즉 B 의 경우 에너지 30keV∼60keV와 도오스 3 × 10 ~ 5 × 10 개/㎠ 그리고 P 의 경우 에너지 1001keV∼ 175keV와 4 ×10 ~ 7×11개/㎠ 도오스 영역에서 이들에 대한 D.C. 인자들의 측정치들이 이론적인 계산치들과 비상, 분석되어 있다. 이 D.C. 인자들에는 threshold전압, 공핍층의 폭, 게이트 산화물 두께, 표면상태, 가동 하전입자 밀도, 전자의 이동도 그리고 마지막으로 누설전류가 있는데, 이중 실제 MOS의 제작에 있어서 특허 중요한 threshold전압에 있어서는, 커어브트레이서와 C - V plot을 통하여 측정된 값들이 실제 재산에서 이용된 SUPREM II 컴퓨우터 프로그램에 의한 결과와 훌륭히 접근하고 있다. 그 밖에 여기나온 D.C.인자들 중에서 도오핑 수준은 기판의 역 게이트 바이어스에서 threshold전압들로 부터 계산된 것이고, 역전도는 정의된 subthreshold 기울기로 부터 추산된 것임을 밝혀 둔다. 마지막으로 이와같은 D. C. 시험 결과들을 종합적으로 평가해 볼 때 만들어진 커페시터와 트렌지스터들이 N -채널 MOS I. C. 기억소자용으로 적합함을 보여주고 있다.

• 한국컴퓨터정보학회논문지
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• 제25권6호
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• pp.183-191
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• 2020

본 연구에서는 커스터마이징 시스템 개발을 위한 신한복 치마 패턴 개발의 기초자료를 얻기 위해 신한복 브랜드의 치마 패턴을 비교 분석하고자 하였다. 신한복 6개 브랜드의 패턴을 분석하여 가상착의를 시킨 후 외관평가와 의복압 및 공극량을 평가하였다. 시판 신한복 브랜드 A, B, C, D, E, F의 허리치마 패턴을 분석한 결과, 같은 디자인의 free 사이즈 치마임에도 불구하고 각기 다른 치수로 제작되는 것으로 나타났다. 허리치마의 패턴은 기존의 한복과 같이 평면적인 패턴으로 구성되었다. 외관평가 결과 앞면, 옆면, 뒷면 모든 평가항목에서 6개 브랜드의 패턴 간에 유의미한 차이가 있는 것으로 평가되었다. 외관평가 모든 항목에서 B 브랜드의 허리치마가 우수한 것으로 평가되었다. 의복압을 알아보기 위해 색분포도와 공극량을 살펴본 결과, 허리에 둘러서 착용하는 허리치마의 특성상 대부분의 부위에서 공극량이 큰 것으로 나타나 의복압이 낮은 것으로 평가되었다. 본 연구에서는 신한복 활성화에 따른 치수 및 패턴 규격화를 위한 기초자료를 제안하며, B브랜드 패턴을 기본으로 한 통일된 패턴개발이 이루어져야 할 것으로 생각된다.