항행 및 항법 : LX대한지적공사 위성측위 인프라 구축 및 네트워크 실시간 이동측위 성능 분석

하지현 ( Ji Hyun Ha1 ),김현호 ( Hyun Ho Kim ),김재복 ( Jae Bok Kim ) 한국항행학회 2014 韓國航行學會論文誌 Vol.18 No.6

대한지적공사 공간정보연구원에서는 네트워크 RTK의 효율성을 향상시키기 위하여 전국에 30개소의 LX 위성측위 인프라를 구축하고 MAC기반의 네트워크 RTK 서비스를 시험운영하고 있다. 본 논문에서는 LX 위성측위 인프라의 구축 현황을 소개하고 MAC기반의 네트워크 RTK 서비스의 측위 성능 분석 결과를 기술하였다. 성능 분석을 위하여 임시 고정점을 설치하고 국토지리정보원의 VRS와 동시관측을 실시하였다. 그 결과 두 인프라는 동서, 남북 방향으로 평균 1~2 ± 1 cm 차이를 보였으며 , 초기화 시간도 10초 이내에서 근소한 차이를 보였다. For improvement of network RTK performance in survey field, Spatial Information Research Institute (SIRI), LX Korea Cadastral Survey Corporation installed 30 GNSS permanent stations in Korea Peninsula, and has been running the MAC-based network RTK service as a test version. In this paper, we introduce the LX GNSS network and analyze the positioning accuracy of the LX MAC RTK service. For field test of the LX MAC RTK service, we installed temporally fixed anchor points and observed simultaneously with VRS of National Geographic Information Institute. As a result, the horizontal position differences and initial times of LX MAC with respect to NGII VRS are 1~2 ± 1 cm and <10 seconds, respectively.

철릭의 연대별 치수비교 연구

하지현,김희은,Ha, Ji-Hyun,Kim, Hee-Eun 한국의류산업학회 2017 한국의류산업학회지 Vol.19 No.5

The purpose of this study is to provide basic data for design and pattern development research in the modernization of Cheollik by comparing and analyzing the interrelationships between the components of the Cheollik. The 237 pieces of excavated costume Cheollik in the museums were surveyed. The size of the Cheollik components were examined by 100 year unit from 1400s to after 1800s. In the 1400s, the length of Cheollik was the shortest and the length of top was longer than the bottom. In the 1700s, the total length was the longest and the bottom was longer than the top. As the age increases, the total length and the bottom become longer and the length of the top becomes shorter. Poom and Gutseop were the largest in the 1400s and the smallest the after 1800s. As the age of the Poom and Gutseop decreased, the width of the Anseop increased. Gutseop was always present but Anseop was not always present in Cheollik components. As the ages passed, Jindong and Soogu became narrower and Baerae became wider. These change of Cheollik's sleeves form were affected by GongBok(so-called official wear) sleeves. By age, Cheollik did not show any big change in the basic shape, but the partial dimensions of the components showed changes. If the design and pattern research for modernization is done based on systematic establishment of pattern dimension of Cheollik, Cheollik dress combines practicality while preserving beauty and tradition at the same time.

수포성 옴

하지현 ( Ji Hyun Ha ),최문정 ( Moon Jung Choi ),김태윤 ( Tae Yoon Kim ),김수찬 ( Soo Chan Kim ),이준영 ( Jun Young Lee ) 대한피부과학회 2003 대한피부과학회지 Vol.41 No.3

We report a case of bullous scabies in an 81-year-old male patient. He had severe pruritic, multiple tense bullae on erythematous base with erosions and crusts from which scabies mites were identified. Histopathologic findings(H&E) revealed subepidermal b

GPS 예측궤도력을 이용한 정밀단독측위 정확도 분석

하지현 ( Ji Hyun Ha ),허문범 ( Moon Beom Heo ),남기욱 ( Gi Wook Nam ) 한국항행학회 2012 韓國航行學會論文誌 Vol.16 No.5

본 논문에서는 IGS 예측궤도력을 이용한 준실시간 정밀단독측위 위치추정 정확도를 분석하였다. 그 결과2010년 1년 동안 평균오차 1~1.6cm, 표준편차 1~1.3cm로 신속궤도력과 유사한 정밀도 달성이 가능했다. 궤도이상이 나타난 날 중 44%에서 10cm 이상의 좌표오차가 관측되었으며, 최대 1.7km, 평균오차 최대 308m 수준으로 나타났다. 따라서 예측궤도력을 활용 시 사전에 궤도력 이상현상에 대한 점검이 반드시 필요할 것으로 판단된다. In this paper, near-real-time positioning accuracies of precise point positioning technique were analyzed using IGS predicted orbits. As a result, we could get the mean errors of 1~1.6 cm, standard deviation of 1~1.3cm from one year of GPS data. This results were similar level to positioning accuracy using the IGS rapid orbits. Positioning errors of >10cm showed 44% of observed days of orbital anomalies. When the orbital anomalies of the predicted orbits were shown, maximum error was 1.7 km, and maximum of mean errors was 308 m. From this study, we conclude that check and consideration were necessary before using the IGS predicted orbits.

한국어판 소아청소년 기질성격검사의 신뢰도 및 타당도 연구

하지현 ( Jee Hyun Ha ),유희정 ( Hee Jeong Yoo ),조인희 ( In Hee Cho ),류인균 ( In Kyoon Lyoo ),신재공 ( Jae Gong Shin ),김지현 ( Ji Hyeon Kim ),홍계현 ( Kye Hyun Hong ),최소현 ( So Hyun Choi ) 한국정신병리진단분류학회 2005 精神病理學 Vol.14 No.1

Objectives: The purpose of this study is to evaluate the reliability and validity of the Junior Temperament and Character Inventory(JTCI), which is a child and adolescent version of Temperament and Character Inventory. Method: JTCI was translated to Korean and applied to 796 children(male=402, female=394, age=11.0±0.9), and their parents. Internal consistency was calculated by Cronbach`s α. A test-retest study was done after 3 months with 115 subjects. Factor analysis for the temperament and character factors were performed using principal component analysis, rotating factor varimax. Results: Cronbach`s α values of the JTCI scales ranged from .52 to .77 for the temperament scales except persistence(.09), and from .47 to .65 for the character scales. Test-retest correlation was relatively low. Factor analysis of temperament showed 3 factors out of 4 temperament scales, but couldn`t extract clear differentiations in character dimension. Intercorrelation between 7 factors were clear each other significantly. Female showed higher reward dependence, persistence, self-directedenss and cooperativeness than male. Discussion: Although reliability is relatively low, this study suggests JTCI is a useful tool to evaluate biosocial model of personality in children population. Character dimension should be assessed with the careful consideration of their development.

GPS를 이용한 토호쿠 대지진 이후 한반도 지각변동 속도 분석

하지현 ( Ji Hyun Ha ),이명근 ( Myong Kun Lee ),조영식 ( Young Sik Cho ) 한국항행학회 2013 韓國航行學會論文誌 Vol.17 No.6

2011년 3월 11일에 일본 토호쿠 지역에서는 Mw 9 규모의 대지진이 발생하였다. 이 지진으로 인하여 일본지각은 최대 5m 이상의 지각변동이 관측되었으며, 한반도 역시 년간 지각변동량이 순간적으로 이동하는 등 지진의 영향권에 있었다. 이 논문에서는 토호쿠 지진이 발생한지 2.5년가량 지난 현재의 시점에서 지진 이후의 한반도 지각변동 속도를 분석하고 과거의 한반도 지각변동 속도와 비교함으로써 변화된 지각변동 경향을 분석하였다. 이를 위하여 국토지리정보원의 GPS 관측데이터를 이용하여 2003년부터 2008년까지 6년간의 관측데이터와 지진 이후 6개월 후부터 2013년 6월 말일까지 관측데이터를 이용하여 정밀 좌표를 결정하고 시계열 분석을 통해 남북, 동서, 수직 방향의 절대 속도를 산출하였다. 그 결과 한반도의 지각변동 속도는 토호쿠 지진 발생 이전에 비해 남북 방향으로 평균 3.9mm/yr, 동서 방향으로 평균 7.5mm/yr의 속도 증가가 발생한 것을 알 수있었다. The great Tohoku-oki earthquake which occurred on March 11, 2011, caused crustal movements in both Korea and Japan. This study attempts to analyze velocity changes of crustal movement of Korea Peninsula due to the Tohoku-oki earthquake and to compare the calculation with precious crustal movenents of Korea Peninsula. We found that the crustal movement velocity of South Korea increased 3.9 mm/yr northward and 7.5 mm/yr eastward on average as a result of the Tohoku-oki earthquake; when this figure is compared with the past crustal movement velocities of the Korea Peninsula.

항행 및 항법 : LX 위성측위 인프라기반 네트워크 RTK를 이용한 측위성능 분석

하지현 ( Ji Hyun Ha ),김현호 ( Hyun-ho Kim ),정완석 ( Wan-seok Jung ) 한국항행학회 2015 韓國航行學會論文誌 Vol.19 No.6

LX 한국국토정보공사 공간정보연구원에서는 2011년부터 LX 위성측위 (GNSS; global navigation satellite system) 네트워크를 구축하고 2014년부터 MAC (master-auxiliary correction) 방식의 네트워크 실시간 이동측위 (RTK; real-time kinematic) 전국망 운영실험을 하고 있다. 본 연구에서는 LX GNSS 인프라의 구축 현황을 소개하고 LX GNSS RTK 서비스를 이용한 측위 성능 분석을 결과를 제시한다. 측위 성능 분석은 전북 전주, 서울, 그리고 인천에 설치된 지적도근점 중 총 25개를 이용하였으며, 1회 관측, 2회 중복관측, 그리고 5회 중복관측을 수행하였다. 측위 성능 비교를 위하여 한국국토정보공사 MAC과 국토지리정보원 VRS로 측량한 성과를 지적도근점의 고시좌표와 각각 비교하였다. 그 결과, 두 시스템이 평균오차와 표준편차가 1~2cm 수준으로 유사한 성능을 보였다. The Spatial information research institute of the LX Korea land and geospatial informatix corporation manages infrastructure for the LX global navigation satellite system (GNSS), which comprises 30 monitoring stations nationwide. Since 2014, it has conducted network real-time kinematic (RTK) tests using the master-auxiliary concept (MAC). This study introduces the infrastructure of LX GNSS and presents the results of a performance analysis of the LX RTK service. The analysis was based on a total of 25 cadastral topographic control points in Jeonju, Seoul, and Incheon. For each point, performance was measured over one observation, two repeated observations, and five repeated observations. The measurements obtained from LX MAC and the VRS of the National Geographic Information Institute were compared with the announced coordinates derived from cadastral topographic control points. As a result, the two systems were found to have similar performance with average error and standard deviation differing only by 1 to 2 cm.

표고버섯 피부염(Shiitake Dermatitis)의 임상 및 병리조직학적 고찰

하지현 ( Ji Hyun Ha ),변대규 ( Dae Gyoo Byun ),김석민 ( Seog Min Kim ),유철호 ( Chul Ho Yoo ),박철종 ( Chul Jong Park ) 대한피부과학회 2003 대한피부과학회지 Vol.41 No.4

N/A Background : Shiitake dermatitis has been reported mostly from Japan and characterized by distinctive pattern of itchy skin eruption after the ingestion of raw shiitake mushrooms. Objective : The purpose of this study is to investigate clinical, laboratory and histopathologic profiles about shiitake dermatitis occurring in Korea. Methods : From 1997 to 2001, we had observed 58 patients with shiitake dermatitis and investigated clinical, laboratory and histopathologic aspects. Result : Most patients with shiitake dermatitis presented with a very strong itching sensation, which was accompanied with linearly grouped or disseminated small erythematous papules. 53patients(91%) had noticed their skin eruption within 3 days after eating shiitake mushrooms. The involved sites were trunk, extremities, neck and face in decreasing order of frequency. Laboratory and histopathologic findings were nonspecific. In 33 patients(57%), the eruption occurred after eating boiled or panbroiled shiitake mushrooms. Conclusion : In this study, clinical, laboratory and histopathologic findings of shiitake dermatitis were almost consistent with the previous reports. But, contrary to the previous reports in Japan, many cases with shiitake dermatitis occurred on eating sufficiently boiled or cooked shiitake mushrooms. This may imply another eiologic factor different from thermolabile toxin. (Korean J Dermatol 2003;41(4) : 440∼444)

연구논문 : 발한 및 피부온 분포를 적용한 흡한속건 T-Shirts의 착용생리반응

하지현 ( Ji Hyun Ha ),김희은 ( Hee Eun Kim ) 한국의류산업학회 2011 한국의류산업학회지 Vol.13 No.4

This study was investigated to evaluate the physiological responses on T-shirts manufactured with selected functional materials by body parts which were se1ectioned on the distribution of sweating and temperature change. Seven healthy men in twenties were participated in a climate chamber of 27±0.5˚C and 50±1%RH. Three kinds of T-shirts named ``D1``, ``D2`` and ``Poly`` were used as experimental clothings. Four kinds of functional materials of quick absorbing/drying were uesd in all section in ``D1``, but two kinds of functional materials used partially in ``D2``. ``Poly`` T-shirts used only polyester. In an experimental schedule of 90 minutes, which were consisted of ``Rest``, twice of ``Exercise`` and twice of ``Recovery`` periods, the subjects walked on a treadmill with 60% of VO2max. As a physiological responses, the microclimate temperature, surface temperature(skin, clothing) and sweat rate were measured. Temperature regulation was kept well in ``D1`` rather than other T-shirts. The quick absorbing/drying T-shirts showed its performance well as the exercise goes on the second half. With these results in mind, ``D1`` will be more effective for long hours exercise such as climbing rather than short hours exercise.

한복 패턴 연구 동향 분석 - 국내 학술지 및 학위논문을 중심으로 -

하지현 ( Ji-hyun Ha ),김희은 ( Hee-eun Kim ) 한국의류산업학회 2017 한국의류산업학회지 Vol.19 No.1

The purpose of this study is to investigate the trends of Hanbok pattern research published in journals and theses. We collected 70 articles related to the Hanbok pattern. The articles were divided into 7 chronicles based on publishing year, and analyzed by journal, publishing year, research theme, wearing subject and research pattern. Researches can be categorized into journals, university research paper, and master`s theses. After 1981, studies on the pattern of Hanbok have been continuing. Most researches were focused on traditional Hanbok, especially about Jeogori. Research on modernized Hanbok started from Vchronicle(2001~2005), but it has not progressed anymore. According to the analysis on wearing subject, the number of research for female Hanbok was almost three times that of the male. Most researches were performed on adult Hanbok, and subjects were expanded to children, adolescents and middle-aged. The body shape of the wearer did not mentioned on many articles. Pattern researches started from excavated costume, but most researches were about commercial patterns. These researches on the pattern on Hanbok have shown an increasing tendency as the years passed, but researches on modernized Hanbok, including Hanbok pattern development for modern life style should be conducted more actively. In an aging society, as the number of middle-aged consumers increases, pattern research on middle-aged or older people and their various body shapes should be necessary.