쌍곡선 근사에 의한 현장타설말뚝의 항복하중 판정

원상연,황성일,조남준,Won, Sang-Yeon,Hwang, Seong-Il,Jo, Nam-Jun 한국지반공학회 1996 지반 : 한국지반공학회지 Vol.12 No.6

본 연구에서는 일반 토사층에 선단지지된 현장타설말뚝의 재하시험결과로부터 얻은 하중-침하 량곡선을 쌍곡선으로 회귀분석하고 여기에 곡률방정식을 이용하여 최대곡률을 나타내는 하중을 항복하중으로 규정하는 판정법을 개발하였다. 그러나 하중과 침하량의 단위 또는 축척에 따라 최대곡률점의 위치가 변하고 따라서 항복하중도 다르게 판별된다(원상연, 1995). 따라서 하중과 침하량을 정규화(normalization)하고 정규화된 침하량(x축)과 하중축(y축)의 축척이 1:1이 되도록 함으로써 하중과 침하량의 단위와 축척에 상관없이 유일한 최대곡률점을 찾을 수 있었다. 본 논문에서 기존의 판정 법들을 이용하여 각각의 항복하중을 구하고 이들의 평균값을 기준으로 하여 정규화 과정을 검토하였다. 이 판정법을 현장타설말뚝에 대한 연직재하시험결과에 적용하여 연직항복하중을 판정하고, 이 결과를 기존의 판정 법들에 의한 항복하중과의 비교를 실시하였다. This study develops a new method for interpreting the yield load from load tests on drilled shaft foundations ended on general soils, which is defined as a point where the maximum curvature on the hyperbolic-approximated load-settlement curve occurs. How ever, the point of maximum curvature is a variable depending on the units and scales of the load and settlement. Therefore, to obtain a unique maximum curvature point, both the load and settlement must be normalized by proper parameters, respectively, and be expressed on the same scaled arses(1:1). Normalization has been processed so that the yield load by the new interpretation is to be close to the average of yield loads interpreted by other methods investigated in this study. The quantitative comparison between the new criterion and other conventitonal methods is presented.

자발적인 휠 달리기 운동이 자연발생고혈압쥐의 대동맥 두께 및 맥파전파속도에 미치는 영향

원상연,김정수,윤진환,오광훈 한국운동생리학회(구 한국운동과학회) 2012 운동과학 Vol.21 No.3

원상연, 김정수, 윤진환, 오광훈. 자발적인 휠 달리기 운동이 자연발생고혈압쥐의 대동맥 두께 및 대동맥 맥파전파속도에 미치는 영향. 운동과학, 제21권 제3호. 299-308, 2012. 본 연구의 목적은 자발적인 휠 달리기 운동이 자연발생고혈압쥐의 대동맥 두께 및 대동맥 맥파전파속도에 미치는 영향을 살펴보는데 있다. 자연발생고혈압쥐 및 위스타 계열의 쥐가 실험군 및 통제 군으로 사용되었으며, 자연발생고혈압쥐는 암, 수로 각각 나누었다. 자연발생고혈압쥐는 6주령에 각각 운동군과 비운동군으로 나누었으며, 운동군 케이지에는 회전 휠을 설치하여 쥐가 자발적인 운동이 가능하도록 하였다. 실험 시작 후 24주 후 대동맥 두께와 맥파전파속도를 측정하였으며, 결과는 다음과 같다. 자연발생고혈압쥐 숫컷은 운동군에서 비운동군에 비해체중이 낮았으나, 암컷은 운동군이 비운동군에 비해 오히려 높았다. 사료섭취량은 암, 수 모두 운동군이 비운동군에 비해 높았다. 암컷 운동군은 숫컷 운동군에 비해 더 많은 활동량을 보였다. 간접적 tail-cuff 방식으로 측정된 수축기 혈압은 SHR 운동군과 비운동군 사이에 지속적인 차이가 발견되지 않았다. SHR의 대동맥 맥파전파속도는 운동군이 비운동군에 비해 유의하게 낮았으나, SHR 암컷에서는 운동군과 비운동군 사이에 유의한 차이가 나타나지 않았다. 중 막 두께 비율은 암, 수 모두 운동군이 비운동군에 비해 유의하게 낮았다. 이러한 결과를 종합해 볼 때 자발적인 휠 달리기 운동이 숫컷 SHR의 대동맥 탄성을 증가시키는데 효과적인 것으로 나타났다. Won, S. Y., Kim, J. S., Yoon, J. H., Oh, K. H, The Effect of voluntary wheel running on aorta thickness and pulse wave velocity in spontaneously hypertensive rats, Exercise Science, 21(3): 299-308, 2012, The purpose of present study was to investigate the effect of the voluntary wheel running on aorta thickness and pulse wave velocity in spontaneously hypertensive rats (SHR). SHR and Wistar control rats (WCR) of both sexes were used in this study. Male an female SHR were respectively divided into two groups(exercised; Ex and non-exercised; nE) at 6 weeks of age:SHREx(male), SHRnE(male), SHREx(female) and SHRnE(female). Exercised SHR were placed in cages with rotating wheels capable of voluntary running. After 24 weeks of feeding, values of thickness and pulse wave velocity (PWV) were measured on aortas. The results were as follows. Body weights of male SHREx were lower than those of male SHRnE, whereas female SHREx were heavier than female SHRnE. Food consumptions of SHREx groups tended to be more than those of SHRnE groups. Female SHREx showed greater running activity than male SHREx. There was no constant difference in systolic blood pressure obtained by an indirect tail-cuff method between SHREx and SHRnE in both sexes. PWV values of male SHREx were significantly lower than those of male SHRnE. In the females, there was no difference between SHREx and SHRnE. Media thickness rates (v.s. diameter) of thoracic aortas of SHREx were significantly lower than those of SHRnE in both sexes. These results suggest that voluntary exercise is effective to improve elastic characteristics of the aorta especially in male SHR.

반복하중을 받는 락앵커의 거동에 대한 기초적 연구

원상연,조남준,황성일 한국지반공학회 2001 한국지반공학회논문집 Vol.17 No.1

송전철탑의 기초로써 락앵커는 바람에 의해 반복적인 하중을 받고 있다. 반복하중은 락앵커의 인발 지지력 감소와 누적변위의 증가를 유발할 수 있다. 그러므로 송전철탑의 락앵커 설계시 세심한 주의가 요구된다. 본 논문에서는 세 가지 암반형태에 시공된 모형 락앵커에 대하여 반복하중 시험을 수행한 결과들을 제시하였다. 시험결과에 의하면 정적 극한하중의 50%보다 작은 최대 반복하중(Q$_{max}$)이 락앵커에 작용할 경우, 락앵커의 지지력에 대하여 반복하중의 영향이 없다. 최대 반복하중이 정적 극한하중의 50%에서 75%로 작용할 경우 누적변위의 증가를 유발하고, 정적 극한하중의 75%이상인 경우 락앵커의 지지력에 심각한 영향을 미친다. 따라서 정적 극한하중의 50% 이상의 반복하중을 받는 락앵커는 불안정하다.

구강안면통증클리닉에 처음 내원한 턱관절장애 환자들의 내원 목표

원상연,김혜경,김미은,Won, Sang-Yeon,Kim, Hye-Kyung,Kim, Mee-Eun 대한안면통증구강내과학회 2010 Journal of Oral Medicine and Pain Vol.35 No.4

Understanding patients' expectation for health visits and providing appropriate care may increase patients' satisfaction with health care, leading to more positive treatment outcome. The study aimed to investigate expectations of the patients with temporomandibular disorders (TMD) at their first visit to university-based orofacial pain clinic and to evaluate any relation with duration of pain, presence of previous treatment, pain severity and pain interference. Inclusion criterion was patients aged over and 18 years old and diagnosed as TMD during 3 months' period from Aug to Nov 2010. They were asked to complete the questionnaires for patients' expectation and the Brief Pain Inventory (BPI) at waiting room prior to consultation. 322 TMD patients participated in the study(M:F=1:1.5, mean age=36 years old). The study indicated that the most important top 3 expectations were 'cure of pain', 'understanding their problem' and 'doctor-patient communication' in order. This finding was not affected by gender, duration and previous treatment history but affected by sub-category of TMD and BPI pain severity and pain interference. 'Pain relief' and 'understanding their problems' were relatively highlighted in the patients with muscle disorders and combination (joint-muscle) disorders of TMD than those with joint disorders who wanted communication and further investigation relatively more (p=0.000). While expectation for pain relief was expected more with increase of pain severity and interference, patients with mild level of pain severity and interference expected communication and further investigation relatively more (p=0.000, 0.017, respectively). Based on the results of the study, though pain relief was the primary concern for TMD patients suffering from pain, their satisfaction with care may be increased by explanation for etiology and mechanism of TMD to make them understand their problems better and doctor-patient communication and collaborative decision-making for treatment. Importance of patient-centered consultations and availability of written material or web sites for patient information should be stressed out.

대학신입생들의 구강상태 인식도와 상대구강진료필요도에 관한 상관관계 조사연구

원상연,신승철,김선영 ( Sang Yeon Won,Seung Chul Shin,Sun Young Kim ) 대한예방치과·구강보건학회 1997 大韓口腔保健學會誌 Vol.21 No.3

GABA가 함유된 클로렐라 섭취 및 자발적인 휠 달리기 운동이 자연발생고혈압쥐의 혈압, 주행량 및 항산화 효소에 미치는 영향

원상연,김정수,이미영,오광훈 한국운동생리학회 2013 운동과학 Vol.22 No.1

The purpose of this study was to investigate the effect of chlorella intake and voluntary wheel running on blood pressure, running distance and antioxidant enzyme in spontaneously hypertensive rats (SHR). Male SHR were divided into 4 groups:control(SHR-C), exercise(SHR-Ex), chlorella intake(SHR-CI) and chlrolella + exercise(SHR-CEx) at a 6 weeks of age respectively. SHR-CI and SHR-CEx were administered GABA during the experimental period(0.5mg/㎏/day). Exercised SHR were placed in cages with rotating wheels to allow voluntary running. Body weight, running distance, food consumption were measured every week. Blood pressure were measured every 2 weeks. After 12 weeks of feeding, values of antioxidant enzyme activity(superoxide dismutase;SOD, glutachion peroxidase;GPx, catalase;CAT) and malondialdehide(MDA) were measured on blood. The results were as follows. Blood pressure significantly decreased in SHR-CI and SHR-CEx(p<.01), and SHR-Ex lower than SHR-C(p<.01). Running distance significantly increased in SHR-CEx compared to SHR-Ex(p<.01). SOD and GPx were significantly elevated in SHR-Ex and SHR-CEx but CAT showed no changes. MDA was significantly decreased in SHR-Ex and SHR-CEx and increased in SHR-C and SHR-CI. These results suggest that the combined treatment of chlorella intake and voluntary exercise can reduce blood pressure and increase running distance and antioxidant enzyme in male SHR. 본 연구의 목적은 클로렐라 섭취와 자발적인 휠 달리기 운동이 자연발생고혈압쥐(SHR)의 혈압, 주행량 및 항산화효소에 미치는 영향을 탐색하는데 있다. 본 실험에서는 6주령 SHR을 4그룹(통제군, 운동군, 클로렐라 섭취군, 클로렐라+운동 군)으로 각각 나누었으며, 클로렐라 섭취 군은 하루에 체중 1㎏ 당 0.5mg 비율로 GABA 성분을 섭취하도록 하였고, 운동군은 자발적인 휠 달리기 운동이 가능한 우리에서 사육하였다. 체중, 주행량, 식이섭취량은 매주, 혈압은 2주마다 측정하였으며, 혈중 항산화 효소는 실험 시작 전과 12 주간의 사육 후 측정하였다. 혈압은 SHR-CI와 SHR-CEx에서 유의하게 감소하였으며, SHR-Ex에서는 유의한 감소는 나타나지 않았지만 대조군에 비해 혈압이 유의하게 낮은 것으로 나타났다(p<.01). 자발적인 휠 운동에 따른 주행량은 클로렐라와 운동을 병행한 SHR-CEx에서 유의하게 증가하였으며(p<.01), SHR-Ex에서는 9주 후에 감소하는 양상을 나타냈다. 항산화 효소는 SHR-Ex와 SHR-CEx에서 SOD 및 GPx 값이 유의하게 증가하였으며(p<.01), CAT 값에는 변화가 나타나지 않았다. MDA는 자발적 운동에 참여한 SHR-Ex 및 SHR-CEx에서 유의하게 감소하였으며, SHR-C 및 SHR-CI에서는 유의하게 증가하였다(p<.01). 이와 같은 결과를 종합해 볼 때 클로렐라 섭취와 자발적인 운동의 복합 처치는 자연발생고혈압쥐의 혈압을 낮추고, 주행량 및 항산화효소를 증가시키는데 효과적임을 알 수 있었다.

IoT 기반 교통안전시설 현장관리 체계 연구

원상연,이준혁,전영재,김진태,WON, Sang-Yeon,LEE, Jun-Hyuk,JEON, Young-Jae,KIM, Jin-Tae 한국지리정보학회 2022 한국지리정보학회지 Vol.25 No.1

In order to trust and use autonomous vehicles, safe driving on the road must be guaranteed. For this, the first infrastructure to be equipped with autonomous driving is traffic safety facility. On the other hand, autonomous vehicles(Level 3) and general vehicles are driving on the road, it is necessary to additionally manage existing general traffic safety facilities. In this study, a field management system for traffic safety facilities based on autonomous driving infrastructure was studied, and a pilot field management system was implemented in the demonstration area(Pangyo). The pilot system consists of a GNSS(Global Navigation Satellite System) receiver, a field management equipment, and a field management app. As a result of field demonstration,, it was confirmed that traffic safety facility information was easily transmitted and received even in downtown areas and that could be efficiently operated and managed. It is expected that the results of this study will be used as reference materials for the spread of autonomous driving infrastructure to local governments and infrastructure construction in the future.

정밀도로지도 산업 발전 방향 및 대응방안 연구

원상연,문지영,윤서연,최윤수 한국지리정보학회 2019 한국지리정보학회지 Vol.22 No.3

As a key infrastructure for positioning autonomous vehicles, HD maps are making efforts to equip autonomous vehicles and connect them with services worldwide. Global companies like Here and TomTom have contracted an agreement with three German automobile companies(BMW, Audi, Daimler) by establishing systems including from the production of HD maps to loading autonomous vehicles. Japan has organized a DMP(Dynamic Map Platform) by collaborating public and private section and performing establishment of HD map on private section-oriented. Korean companies related with autonomous vehicles are also cooperating with various companies such as vehicles, sensors and maps. But public and private sections are establishing HD maps respectively. Accordingly, Ministry of Land, Infrastructure and Transport implemented and signed memorandum for private and public cooperation in April 2019, Joint establishment council of HD map has launched in August 2019. This study performed domestic and foreign trend analysis about HD map and interviewed to related companies. And analyzed solutions for interactive cooperation of private and public section in HD map industry, purposed step-by-step strategy for operation and operation plan for joint establishment council of HD map. 현재 자율주행차의 위치결정을 위한 핵심 인프라인 정밀도로지도는 전 세계적으로 자율주행차 탑재 및 서비스 부문에 대한 연계를 위해 노력하고 있다. 글로벌 기업인 Here와 TomTom은 정밀도로지도 생산에서 자율주행차 탑재까지 일련의 체계를 민간기업 중심으로 구축하여 독일 3사(BMW, Audi, Daimler)와 협약을 체결하였다. 일본은 2017년부터 민관이 협력하여 DMP (Dynamic Map Platform)를 조직하고 민간중심의 정밀도로지도 공동구축을 수행하고 있다. 한편, 우리나라 자율주행차 관련 기업들도 차량, 센서, 지도 등 다양한 기업들과 협약을 체결하여 협력하고 있지만 민간과 공공이 개별적으로 정밀도로지도를 구축하고 있는 실정이다. 따라서 국토교통부에서는 기관과 기업의 중복투자 방지, 신속한 정보갱신 등 정밀도로지도의 발전을 위하여 2019년 4월 민-관 협력을 골자로 하는 MOU를 추진하여 체결하였고, 2019년 8월 정밀도로지도 공동구축 협의체를 출범하였다. 이에 본 연구에서는 정밀도로지도 관련 국내·외 동향을 분석하고 관련 기업을 대상으로 인터뷰를 수행하였다. 그리고 국내 정밀도로지도 산업에서 민-관이 상생 협력할 수 있는 방안 등을 분석하였고, 향후 정밀도로지도 공동구축 협의체 운영을 위한 단계별 추진전략 및 운영 방안에 대하여 제시하였다.

대학신입생들의 구강상태 인식도와 상대구강진료필요도에 관한 상관관계 조사연구

원상연,신승철,김선영 단국대학교 치과대학 예방치과 1998 예방치과 세미나집 Vol.- No.12

The purpose of this study was to detemine toe correlation between the awareness and the status of their won oral diseases. A questionnaire survey form was desinged to determine the awareness of their won oral diseases and asked aoo of the university freshmen students to fill out the al of questionaries. They were then immediately examined for을 새 determine their status of dental hard tissures by using the WHO criteria. Also determined were the CPITN and the needs for orthodontic as well as prosthodontic treatments. The results were then statistically analyzed to determine the correlation coefficiencies between the awareness and the status of oral diseases by using SPSS statistical package. The results suggested the followings; 1. The correlation coefficiencies between the awareness and the status for number of teeth decayed, missed, and indicated for extractions were 0.18, 0.06 and 0.09 respectively. 2. The correlationg coefficiency between the awareness and the status in treated teeth(F component) and CPITN were 0.622 and 0.10 respectively. 3. The agreement between examiners and examiners on the needs for prosthodontic treatments was 87.31% and their sensitivity and specificity were 47.54% and 88.55% respectively. 4. The agreement between examiners and examinees on the needs for orthodontic treatment was 70.40% and their sensitivity and specificity were 77.27% and 69.71% respectively. Data indicate that a majority of respondents are lacking in the awareness of their own oral disease status. Therefore, it is concluded that a regular oral examination, a regular counselling on oral health status as well as specific oral health education for each individual warranted.

대학 신입생들의 구강상태 인식도와 상대구강진료필요도에 관한 상관관계 조사연구

원상연,신승철,김선영 단국대학교 치과대학 예방치과 1997 예방치과 세미나집 Vol.- No.11

The purpose of this study was to determine the correlation between the awareness and the status of their won oral diseases. A questionnaire survey form was designed to determine the awareness of their won oral diseases and asked aoo of the university freshmen students to fill out the all of questionaries. They were then immediately examined for을 새 determine their status of dental hard tissures by using the WHO criteria. Also determined were the CPITN and the needs for orthodontic as well as prosthodontic treatments. The results were then statistically analyzed to determine the correlation coefficiencies between the awareness and the status of oral diseases by using SPSS statistical package. The results suggested the followings; 1. The correlation coefficiencies between the awareness and the status for number of teeth decayed, missed, and indicated for extractions were 0.18, 0.06 and 0.09 respectively. 2. The correlation coefficiency between the awareness and the status in treated teeth(F component) and CPITN were 0.622 and 0.10 respectively. 3. the agreement between examiners and examinees on the needs for prosthodontic treatments was 87.31% and their sensitivity and specificity were 47.54% and 88.55% respectively. 4. the agreement between examiners and examinees on the needs for orthodontic treatment was 70.40% and their sensitivity and specificity were 77.27% and 60.71% respectively. Data indicate that a majority of respondents are lacking in the awareness of their own oral disease status. Therefore, it is concluded that a regular oral examination, a regular counselling on oral health status as well as specific oral health education for each individual warranted.