• 한국멀티미디어학회논문지
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• 제22권1호
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• pp.62-69
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• 2019

In this paper, we propose iZone system for safe walking of children. The proposed system recognizes the state that a child is down a roadway as a dangerous situation. And then it informs the surrounding adults and guardians of the child in the event of a dangerous situation. The iZone system consists of the iZone device that attaches to a child's bag or clothing, the iZone app for children, the iZone server, and external beacons. The proposed system uses the ultrasonic sensor of the iZone device and the GPS coordinates and external beacons information by the children's smartphone to determine the dangerous situation. The proposed system uses external beacons to calibrate the GPS coordinates. Moreover, it determines whether the child is down the roadway in sidewalk by measuring the height difference between the roadway and the sidewalk using ultrasonic sensor.

• 한국구조물진단유지관리공학회 논문집
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• 제8권3호
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• pp.197-205
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• 2004

연약지반 개량을 위해 진공압밀공법을 적용할 경우 발생되는 Hardening Zone의 범위와 진공압 세기의 관계를 연구하였다. 이를 위하여 단위 셀 형식의 시험기를 제작하여 국내의 대표적 준설매립공사지역인 광양, 부산, 목포에서 채취한 고함수비 상태에서의 준설점성토에 대해 각각 함수비와 콘저항치수를 측정하여 진공압의 변화에 따른 Hardening Zone의 변화를 파악하였다. 높은 진공압상태에서는 배수재의 막힘현상과 배수재 부근에서 빠르게 생성되는 Hardening Zone 등으로 인하여 배수층으로의 간극수의 흐름이 방해되어 낮은 진공압상태에서 보다 Hardening zone의 범위가 커지지는 않았다.

• 디지털콘텐츠학회 논문지
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• 제16권3호
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• pp.407-415
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• 2015

오프라인 English Zone이란 교실 내에서 학습자가 영어로 말하고 듣고, 알고 싶은 단어나 내용을 스스로 찾고 연습하고 그 결과를 확인할 수 있도록 만든 물리적 환경을 말한다. 그러나 제한적이고 인위적 환경에 의존할 수밖에 없는 오프라인의 English Zone은 쇼핑 존, 레스토랑 존, 병원 존 등의 소규모 영어 마을처럼 인위적인 공간을 설정하여 학생들이 자발적으로 Role Play를 체험할 수 있는 환경을 제공해야 하는 극히 제한적인 운영이 될 수밖에 없다. 본 연구의 목적은 이러한 오프라인에서의 English Zone 프로그램을 활용한 학습방법이 가지고 있는 환경적인 제한성의 문제점을 분석하고 유비쿼터스 개념에 기초하여 멀티미디어 도구 활용, 무선 인터넷 활용과 SNS를 활용한 온라인 English Zone 프로그램의 활용 방안을 제시하고자 한다.

• 한국통신학회논문지
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• 제37권6B호
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• pp.443-452
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• 2012

Mobile Ad-hoc Networks 환경에서 노드의 이동성을 고려하기 위한 라우팅 알고리즘은 그 특성에 따라 Proactive와 Reactive 방식으로 구분되며, 두 가지 라우팅의 장점을 조합하는 많은 Hybrid 라우팅이 ZRP (Zone Routing Protocol) 알고리즘을 기반으로 설계되어왔다. ZRP는 특정 지역의 Zone을 생성한 후, Zone 내부에는 Proactive, 외부에는 Reactive 방식을 운영하여 근거리 노드들을 향하는 데이터의 경로 탐색 패킷 발생의 비용을 최소화 하였다. 하지만 실제 네트워크에서의 데이터 전송은 짧은 시간 영역에서 특정 노드에게만 요구되는 경향이 있으며, 이에 대한 고려가 없는 ZRP는 이러한 요구를 만족시키기에는 제한적이다. 본 연구는 실시간 데이터 전송량과 전송 경로의 홉 수를 고려하여, 소스 노드와 목적지 노드를 근간으로 하는 Zone을 on-demand로 형성하는 효율적인 Hybrid 라우팅을 제안하고, 이를 위하여 Zone의 생성 및 소멸을 결정하는 DZD (Dynamic Zone Decision) 알고리즘을 고안한다. 또한, 본 연구의 성능을 검증하기 위하여 기존의 Proactive, Reactive, Hybrid 라우팅 알고리즘과의 비교결과를 분석하였다.

• 대한한방부인과학회지
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• 제21권4호
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• pp.183-193
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• 2008

Purpose: To research the changes of Skin Resistance Variability(SRV) over the period of ovarian cycle of healthy young women with normal and regular menstrual cycles using Oriental Medical Diagnose Autonomic system-3000 (OMD-3000). Methods: We measured SRV of 15 women who were working at O O Oriental Hospital from July to Oct. 2008. Each woman took the OMD-3000 test 8 times during 2 menstrual cycles. Each cycle consists of 4 phases-follicular phase, ovulation, luteal phase and menstruation. We analyse the data by SPSS 12.0 for windows. the one-way ANOVA by Repeated Measure(p<0.05). Results: 1. (1) The Factor AA means at zone 1 were 0.77$\pm$0.40, at zone 2 were 1.07$\pm$0.68, at zone 3 were 0.77$\pm$0.35, at zone 4 were 0.68$\pm$0.32, at zone 5 were 0.74$\pm$0.29, at zone 6 were 0.85$\pm$0.30, and at zone 7 were 0.74$\pm$0.29. The Factor AA means were lower than normal range at zone 1,3,4,5,6 and 7. The graph pattern of M shape was caused by the Factor AA means at zone 2 and zone 6 were higher than others. (2) The Factor AA means at zone 1 and zone 3 show abnormal regulation state. 2. During the menstruation. the Factor AA means were higher at zone 1,2 and 3 than other zones. During the ovulation, the Factor AA means were higher at zone 4,5,6 and 7 than other zones. Especially at the menstruation phase in zone 2 and at the ovulation phase in zone 6 tend to be highest means than other phases respectively. 3. However there were no significant difference of means during 4 ovarian phases in 7 zones except ovulation phase to luteal phase at zone 4(p = 0.013). Conclusion: The results suggest that changes of SRV during 4 menstrual cycles are not variables in reading 7-zone-diagnostic system. Further study will be needed.

• Korean Chemical Engineering Research
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• 제50권5호
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• pp.866-873
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• 2012

난황에 포함된 IgY는 포유동물에 있는 바이러스나 항원에 반응하는 항체와 같은 역할을 한다. 난황을 전처리한 후 3-zone와 4-zone SMB를 이용하여 지질단백질들로 부터 IgY를 분리하는 전산모사연구를 수행하였다. 회분식 크로마토그래피에서 전산모사 매개변수와 흡착 등온식 SMB 전산모사 변수를 얻었다. Aspen simulator를 이용하여 전산모사를 수행하여 IgY를 분리할 수 있는 3-zone과 4-zone SMB 운전조건을 비교하여 다음과 같은 결과를 얻었다. IgY와 다른 단백질의 농도와 순도를 모두 고려할 때, 꼭지점인 좌표($m_2$, $m_3$=0.1, 1.1)에서 3-zone SMB가 최적의 조건으로 생각된다. IgY 만을 고려하면 4-zone SMB가 좌표($m_2$, $m_3$=0.06, 0.5)에서 가장 높게 IgY를 분리할 수 있었다. recycle이 없는 3-zone SMB는 꼭지점 좌표에서 좌표이동이 extract의 지질 단백질 농도에 큰 영향을 주었다.

• 한국환경생물학회:학술대회논문집
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• 한국환경생물학회 2002년도 학술대회
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• pp.137-140
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• 2002

To determine if fish density, biomass, species richness, and species diversity were greater in ecotone than the stream and littoral zones, I sampled fish monthly in the Ledbetter Creek through Ledbetter Creek Embayment in Kentucky Lake, Kentucky, from April to October 1996 by using throw traps. During the first four months (daytime only) fish density did not vary significantly among zones or among months. However, there were significant differences among zones during the last three months and the stream zone had significantly higher mean fish density than both the littoral zone and the ecotone. Fish biomass also differed significantly among zones during the last three months. The stream zone had the highest mean fish biomass among zones, significantly higher than the ecotone, but not different than the littoral zone. There were no statistically significant differences among zones during the first four months, but mean fish biomass in the stream zone was about eight times higher than the ecotone, The stream zone had the highest fish species richness among zones. Differences were significant among zones during the last three months, and the stream zone (0.98 $\pm$ 0.04) had significantly greater mean fish species richness than the ecotone (0.45 $\pm$ 0.01), but not significantly than the littoral zone (0.56 $\pm$ 0.17). Fish species richness differed significantly among months during the first four months, Monthly species diversities ranged from 0.62 to 1.96 in the stream zone, 0 to a.57 in the ecotone, and 0 to 2.60 in the littoral zone. Combined species diversities in the stream, the ecotone , and the littoral zones were 2.72, 3.58, and 3.10, respectively, There were five families of fishes captured frequently enough for their individual numbers to comprise at least 8 % of the total. Family rankings in the stream zone were opposite of the littoral zone. Percidae was the most abundant family and Clupeidae was absent in the stream zone, whereas Percidae was uncommon and Clupeidae was the most abundant family in the littoral zone. Atherinidae was dominant in the ecotone. Five of the most abundant species comprised 65 % of the total number. The guardian darter occurred only in the stream zone, and it was consistently found in riffles. Longear sunfish and central stoneroller also had significant differences of mean fish densities among zones, and they were found mostly in the stream zone. Threadfin shad and bullhead minnow were almost exclusively caught in the littoral zone. I finally concluded that the ecotone between the stream and the littoral zone in this small-scale freshwater aquatic ecosystem was not as productive as the ones in other ecosystems.

• 대한교통학회지
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• 제27권5호
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• pp.39-49
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• 2009

본 연구는 현재의 보행자 보호구역 선정기준 문제점을 분석하여 현실에 맞는 기준 재정립에 관해 기술하였다. 구체적인 사항으로는 보행자 교통사고의 문제점에 대하여 통계자료를 기본으로 보행자 교통사고의 추이, 사고의 발생 유형, 행동유형 등을 종합적으로 분석하고 보행자 교통사고의 감소를 위한 대책으로 보행자 보호구역을 지정 운영하고 있는 국내 외의 사례를 활용하여 국내의 Zone30 구역 선정 기준을 도출하였다. 또한, 현장조사를 통해 교통량과 속도가 보행자 사고에 미치는 영향을 분석하여 정량적인 기준을 제시하였으며, 정량적 기준 외에 사고유형, 도로기능, 사고위치 등 보행자 교통사고 발생건수 등의 사고특성을 분석하여 기준을 제시하였다. 특히 교통사고의 통계자료를 활용하여 보행자 안전성에 역점을 두었다. 또한, Zone30 구역의 안전시설 설치에 관한 설치기준 및 운영방안의 체계적인 정립이 이루어지지 않아 각 지방 단위별로 일관성이 없고 혼란이 발생하여 Zone30 구역에 설치될 시설설치 표준지침 수립과 운영방안을 제시하였으며, Zone30 구역 교통운영별 시설물 배치도를 제시하여 설치기준을 제시하였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.13-14
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• 2003

Burgess?s concentric zone model is a famous theory in the geography of city. However, the zone border line drawing method was uncertain. We have developed the method of drawing the border using land use images.

• Journal of Acupuncture Research
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• 제25권2호
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• pp.139-149
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• 2008

Objectives : The 7-zone-diagnostic system is a diagnostic device to predetermine bodily locations by measuring the energy of body. This study was to investigate the relation between the different patterns of Zone 2, 6 of Factor AA in VEGA DFM 722(VEGA, Germany), 7-zone-diagnostic system and clinical parameters. The purpose of this study was relation Korean traditional medicine and western medicine with the data from 7-zone-diagnostic system and the clinical parameters. Methods : This study was carried out with the data from some clinical parameters. We made two groups according to the Factor AA patterns of VEGA DFM 722. The Factor AA pattern of Group A is that the red bar graph of zone 2 was higher than the normal range and the red bar graph of zone 6 was lower than the normal range. The Factor AA pattern of Group B was that the red bar graph of zone 2 was lower than the normal range and the red bar graph of zone 6 was higher than the normal range. After the data from clinical parameters to correspond with conditions of each group were selected, the data from clinical parameters between each gropus analyzed statistically. Results and Conclusions : The values of Direct Bilirubin, GOT, BUN and BUN/Creatinine ratio of Group A were higher than them of Group B. The values of Sodium and Tyroxine of Group A were lower than them of Group B. These results mean that Group A has low energy but has increading tendency. To conclude, it is thought that the red bar graph of zone 2 is higher, the group is the more increasing and the red bar graph of zone 6 is lower, the group has the lower energy.