멀티센서 기반 차량 위치인식 시스템의 설계 및 구현

장윤호,남상균,배상준,성태경,곽경섭,Jang, Yoon-Ho,Nam, Sang-Kyoon,Bae, Sang-Jun,Sung, Tae-Kyung,Kwak, Kyung-Sup 한국ITS학회 2009 한국ITS학회논문지 Vol.8 No.6

본 논문에서는 가우시안 정규분포 모델 기반의 멀티센서 데이터 퓨전 알고리즘을 이용한 차량 위치인식 시스템을 제안한다. 기존의 차량 위치인식 시스템은 GPS를 중심으로 제공되어 왔으나 위성 신호 수신이 어려운 실내나 빌딩이 빽빽하게 들어선 도심에서는 제대로 작동하지 않는 문제가 있었다. 이를 해결하기 위해 GPS와 UWB를 결합하는 방법이 연구되었으나 위치변화에 따라 각 측위매체를 이산적으로 전환하여 차량과 같은 이동이 잦은 대상에게 끊임없이 유연한 위치 정보를 제공하지 못하는 단점이 있다. 따라서 본 논문에서는 가우시안 정규분포 모델을 바탕으로 GPS 위치 데이터와 UWB 센서 데이터를 유기적으로 결합하는 Hybrid UWB/GPS 측위시스템을 구성하여 측위시스템의 적용범위에 민감하지 않고 유연한 위치정보를 제공하도록 한다. 제안된 시스템을 Ubisense와 Asen GPS를 이용하여 $12m\;{\times}\;8m$ 크기의 실외 환경에서 실험하였으며, 구현된 시스템을 통해 기존 UWB 및 GPS 시스템에 비해 정밀도 및 연동성이 향상되었음을 확인하였다. 이를 통해 차량에서 주차 관리 및 차량추적 관리 등 다양한 CNS를 지원할 수 있다. In this paper, Gaussian probability distribution model based multi-sensor data fusion algorithm is proposed for a vehicular location awareness system. Conventional vehicular location awareness systems are operated by GPS (Global Positioning System). However, the conventional system is not working in the indoor of building or urban area where the receiver is difficult to receive the signal from satellites. A method which is combined GPS and UWB (Ultra Wide-Band) has developed to improve this problem. However, vehicular is difficult to receive seamless location information since the measurement systems by both GPS and UWB convert the vehicle's movement information separately at each sensor. In this paper, normalized probability distribution model based Hybrid UWB/GPS is proposed by utilizing GPS location data and UWB sensor data. Therefore the proposed system provides information with seamless and location flexible properties. The proposed system tested by Ubisense and Asen GPS in the $12m{\times}8m$ outdoor environments. As a result, the proposed system has improved performance for accurateness and connection ability between devices to support various CNS (Car Navigation System).

장기간 저강도 복합운동이 여성 노인의 기능체력, 보행속도 및 신체조성에 미치는 영향

장윤호(Jang, Yoon-Ho),신상근(Shin, Sang-Keun) 한국체육과학회 2017 한국체육과학회지 Vol.26 No.3

This research aimed to verify the effects of a long term low-intensity combined exercise program as an exercise intervention on functional fitness, gait speed, and body composition in elderly women. A total of 24 subjects were assigned to low-intensity exercise group(n=12) and control group(n=12) randomly. A 60 minute Otago exercise was applied to them as the intervention 3 times a week for 32 weeks by RPE 9-12. Functional fitness was measured by Senior Fitness Test. Gait speed was measured by 10m distance divided by the second. Items for body composition consisted of height, weight, BMI, WHR, skinfold thickness(triceps, subscapular), %fat, %LBM, Fat, LBM, Fat/height, and LBM/height. Mean and standard deviations were calculated by using SPSS Version 22.0. A two-way repeated measures ANOVA was conducted to verify interactions between pre-post measurement and groups. Statistical significance was set at p<.05. This research showed that there were significant interactions between time and groups in 30- second chair stand(p<.01), 30-second arm curl(p<.05), back scratch(p<.01) and 8-foot up-and-go(p<.05), gait speed(p<.001) for low-intensity combined exercise group. Significant increases appeared between groups in 30-second chair stand(p<.05), and 30-second arm curl(p<.001) for low- intensity combined exercise group. Significant increase appeared between time in 30-second chair stand(p<.05), and back scratch(p<.05), gait speed(p<.05) for low-intensity combined exercise group. It showed significant changes between pre-mid measurements in triceps(p<.01) for low-intensity combined exercise group. With low -intensity RPE 9-12 for a long term, this combined exercise program can be used as an effective and safe exercise intervention to reduce triceps skinfold thickness and improve lower body strength, upper body strength, dynamic balance, agility, gait speed and prevent falls for elderly women living in a community.

철도건설기준 합리화 방향에 대한 고찰

장윤호(Yoon-Ho Jang),안홍영(Hong-Young An) 한국철도학회 2017 한국철도학회 학술발표대회논문집 Vol.2017 No.10

철도 P.S.C BOX 교량의 고강도 강연선 적용에 대한 분석

장윤호(Yoon-Ho Jang),강창호(Chang-Ho Kang),권태로(Tae-Ro Gwon),안홍영(Hong-young Ann) 한국철도학회 2017 한국철도학회 학술발표대회논문집 Vol.2017 No.05

최근 고강도 재료의 활용을 통한 구조물의 안전성, 단면 축소, 경제성 향상에 대한 관심이 증대되고 있다. 이미 P.S.C 교량은 고강도 콘크리트 및 고강도 강연선을 적용한 상부형식이 개발되어 현장에 적용되고 있다. 본 연구에서는 일반화 된 P.S.C Box 거더를 대상으로 2,400Mpa 고강도 강연선을 적용하여 수량, 텐던 배치 및 개수 3가지 매개변수를 주어 원설계와의 비교를 통해 구조 안전성 및 경제성 분석을 수행하였다. 그 결과, P.S.C Box의 경우 원설계 이상의 안정성이 확보되는 조건으로 포스트텐션 공사비가 최대 27.98%의 절감효과가 있는 것으로 분석되어, 고강도 강연선 적용시 경제적 시공이 가능할 것으로 판단된다 In recent years, there has been growing interest in improving the safety, sectional reduction, and economic efficiency of structures through the application of high-strength materials. P.S.C bridges have already been developed in the field with the development of high-strength concrete and high-strength strands. In this study, generalized P.S.C box girder was applied to 2,400Mpa high strength strands, and structural safety and economic analysis were carried out by comparing with the original design by using three parameters such as quantity, tendon arrangement and the number of strands. As a result, it is analyzed that the post-tension construction cost is reduced by 27.98% at maximum in the case of the P.S.C box, which is more stable than the original design, and it would be economical with the high strength strands.

16주간 Otago운동이 여성 노인의 Fullerton 상급균형 척도 및 삶의 질에 미치는 영향

장윤호(Jang, Yoon-Ho),신상근(Shin, Sang-Keun) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.3

This research aimed to verify the effects of a 16-week Otago exercise program on Fullerton advanced balance scale and quality of life in elderly women. A total of 29 subjects were assigned to Otago exercise group(n=14) and control group(n=15) randomly. A 60-minute Otago exercise was applied 3 times a week for 16 weeks by 20-25%HRR. 10 items were measured by using Fullerton advanced balance scale to check static balance, dynamic balance, and mobility. SF-36 survey was used for quality of life in elderly women. Mean and standard deviation were calculated to analyze the research data by using SPSS Version 22.0. Independent t-test was used to compare two groups" equality. Two-way repeated measures ANOVA was conducted to verify the differences between time and groups, and interaction between time and groups. Statistical significance was set at p<.05. This research showed that significant interactions between pre-post measurement and groups appeared in FAB5(p<.05), FAB9 (p<.01), FAB10(p<.001), FAB total(p<.01) in FAB scales, and mental health(p<.05) in quality of life for Otago exercise group. Otago exercise program confirmed the effectiveness on balance ability, though it was a kind of low intensity exercise (25%HRR). This exercise program can be used as an effective exercise intervention to enhance balance ability, prevent falls and maintain quality of life, confirming the usability of Fullerton advanced balance scale for elderly women living in a community.

삼화 철 광상의 Skarn 광물

지정만,장윤호,성일용,Chi, Jeong mahn,Jang, Yoon ho,Sung, Il yeong 대한자원환경지질학회 1994 자원환경지질 Vol.27 No.5

The Samhwa iron ore deposit, which is of typical magnetite skarn type, is located in the Samhwadong area of Donghae city, Kangwon-do, Korea. Skarn minerals are mainly composed of garnet, clinopyroxene, vesuvianite, wollastonite and small amounts of epidote and quartz. The garnets are isotropic $(Ad_{92.82{\sim}98.37})$ or anisotropic andradite $(Ad_{45.30{\sim}75.85})$ and grossular $(Gr_{86.26{\sim}24.47})$, the clinopyroxenes are ferrosalite and salite, Homogenization temperature of gas rich two phase inclusions in garnet are $368{\sim}593^{\circ}C$, and salnities of polyphase inclusions in garnet have 33.9~68.4 equ. NaCl wt. %. Garnet grain often shows composional variation from its core to rim. In other words, Fe and Al contents in garnet vary inversely, which suggest that the variation depends upon $f_{o2}$ during skarn formation.

한반도 서해안 변산-태안지역 연안 퇴적물과 육상지질과의 지화학적 상관관계

서경원,지정만,장윤호,Seo, Kyoung Won,Chi, Jeong Mahn,Jang, Yoon Ho 대한자원환경지질학회 1998 자원환경지질 Vol.31 No.1

A geochemical study was carried out to define how marine shore sediments are related to their terrestrial source rocks in the region of Taean and Byunsan Peninsula, western Korea. The lithology of the coastal part of the study area is composed of Pre-Cambrian granite gneiss, schist, Jurassic terrestrial sedimentary rocks, and Cretaceous plutonic intrusives. Shore sediments are transported from three drainage tributaries. The sediments consist of quatrz with clay minerals, such as illite, kaolinite, smectite, chlorite. Heavy minerals include hematite, ilmenite, rare amount of zircon and apatite. Compared to those in coastal rocks, amount of heavy minerals in the sediments is considerably low. The low content of heavy minerals is thought to be attributed to the heavy mineral detainment in the river beds and influences of tidal currents which cause heavy minerals to accumulate in specific spots. Chemical composition of the major and trace elements, trace elements, and REE chondrite normalized pattern suggest that shore sediments transported from the corresponding drainage tributary show close mineralogical and geochemical relationships with the source rocks distributed in the Taean and Byunsan Peninsula.

폴리아미드6/반응성 포리프로필렌 블렌드계에서 SEBS-g-MA의 충격개선효과

고재송,윤태성,정인권,최형기,장윤호,Koh, Jae Song,Yoon, Tae Sung,Jung, In Kwon,Choi, Hyeong Ki,Jang, Yoon Ho 한국공업화학회 1999 공업화학 Vol.10 No.8

PA6/PP-g-MA 블렌드계에 상용성 충격개선제로서 SEBS-g-MA를 첨가하여 용융혼합하였고 기계적 물성과 모폴로지 변화를 조사하였다. SEBS-g-MA의 첨가에 의해 인장강도는 약간 감소하지만 파단신율은 증가하였다. 충격강도는 PP-g-MA와 SEBS-g-MA 함량이 증가할수록 증가하였다. 이는 무수말레산의 카르복시기와 아마이드의 반응에 의해 계면접착력과 상용성의 개선이 이루어졌기 때문이다. Dynamic mechanical thermal analyzer(DMTA)를 이용한 tan ${\delta}$의 변화에서도 전형적인 고분자 블렌드의 상용화거동을 보였다. 최종적으로 이 블렌드물의 상구조를 관찰한 결과에서도 SEBS-g-MA의 첨가에 따라 분산상의 크기가 감소하는 것으로 보아 상용성과 계면접착력이 개선됨을 확인하였다. Melt blend of PA6/PP-g-MA system containing SEBS-g-MA as a compatible impact modifier was prepared to investigate the change of mechanical properties and morphologies. The tensile strength slightly decreased, but the elongation at break increased with increasing content of SEBS-g-MA in the blend. Also the notched izod impact strength increased with increasing the content of PP-g-MA and SEBS-g-MA. It is attributed to improved compatibilization and interfacial adhesion by reaction of the amide of PA6 with maleic anhydride of SEBS-g-MA and PP-g-MA. The result of dynamic mechanical analysis(DMA) showed a typical behavior of the compatibilization in the polymer blends. Finally, in the phase structure observed by the use of SEM, we confirmed improvement of the compatibilization and interfacial adhesion with increasing the content of SEBS-g-MA and PP-g-MA.

집중호우시 발생된 삼척지역의 산사태 특성

송영석 ( Young Suk Song ),장윤호 ( Yoon Ho Jang ),김진석 ( Jin Seok Kim ) 대한지질공학회 2005 지질공학 Vol.15 No.4

본 연구에서는 2002년 태풍 "루사(Rusa)"와 2003년 태풍 "매미(Meami)"에 의한 집중호우시 삼척지역에 발생된 산사태를 조사하여, 대상지역의 강우와 산사태의 관계를 규명하였다. 삼척지역의 연평균강우량은 1,200~1,300㎜이며, 2002년 및 2003년에는 태풍 "루사" 및 "매미"로 인한 집중호우로 인하여 연평균강우량이 2,000㎜이상으로 증가되었음을 알 수 있다. 최대시간강우강도와 2일간 누적강우량이 상대적으로 큰 지역에서 산사태 발생개소 및 붕괴면적이 크게 발생되고 있으므로, 산사태는 강우강도와 누적강우량에 직접적인 영향을 받고 있음을 확인할 수 있다. 삼척지역에서 발생된 산사태는 태풍에 의한 집중호우에 의한 것이므로 산사태 발생당일 최대시간강우강도에 크게 영향을 미치는 것으로 나타났다. 합리적인 산사태 발생규모를 예측하기 위하여 기존의 방법을 종합적으로 적용하여 최대시간강우강도와 산사태 붕괴면적을 모두 고려할 수 있는 새로운 방법을 제안하였다. 기존의 방법 및 새로 제안된 방법을 적용한 결과 삼척지역의 산사태 발생규모는 대규모 산사태임을 알 수 있다. Landslides induced by heavy rainfall from typhoon "Rusa" in 2002 and typhoon "Meami" in 2003 were investigated at Samcheok area, and the relationship between landslides and rainfall on that area was analyzed. The average annual rainfall at Samcheok area is generally 1,200㎜~1,300㎜. However, the average annual rainfall at Samcheok for 2002 and 2003 was increased more than 2,000㎜ because of typhoon "Rusa" and typhoon "Meami". The number of landslides and the landslides area are largely occurred in a area of the relatively high maximum hourly rainfall and 2days cumulative rainfall. Therefore, it confirmed that landslides are directly depended on the hourly rainfall and the cumulative rainfall. The landslides at Samcheok area induced by heavy rainfall due to typhoon are more influenced by the maximum hourly rainfall at the landslide occurrence day. In order to predict a rational landslide size, a new method included the maximum hourly rainfall and the landslide area in a traditional way was proposed. As the result of applying the new proposed method, the landslide size at Samcheok area is involved in the large scale landslide.

염수로부터 수산화마그네슘의 침전 특성 연구

서봉원,송영준,이계승,신강호,장윤호,김윤채,윤시내,Seo, Bong Won,Song, Young-Jun,Lee, Gye Seung,Shin, Kang Ho,Jang, Yoon Ho,Kim, Youn-Che,Yoon, Si-Nae 한국자원리싸이클링학회 2014 資源 리싸이클링 Vol.23 No.3

본 논문은 마그네슘 함량이 매우 높은 특징을 갖는 볼리비아 우유니호 염수로부터 리튬을 회수하는 공정의 설계에 필요한 기초 자료를 얻을 목적으로 수행되었으며, 농축된 용액에 수산화칼슘의 첨가하여 수산화마그네슘을 침전시키는 반응에 있어서 용존 이온의 농도에 미치는 반응온도, 반응시간, pH 등 제 인자들의 영향을 조사하였다. This study was conducted to obtain the basic data for designing the lithium recovery process from the "salar de Uyuni" in Bolivia. For this study, the mock brine which has the similar chemical composition with the brine of "salar de Uyuni" was prepared, and the effects of reaction factors such as temperature, time, pH and so forth on the precitation reaction of magnesium hydroxide were investigated.