연령증가에 따른 혈압요소들의 좌심실비대 및 관동맥질환과의 관련성

박재석,박창규,박미영,박재형,김용현,나진오,신성희,서순용,홍순준,박성미,임홍의,김응주,서홍석,오동주,노영무 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

Effect of Impact Velocity on Interface Characteristics of HT‑9 Steel Joints Fabricated by Magnetic Pulse Welding

Jun‑Woo Song,Jin‑Ju Park,Gyoung‑Ja Lee,Min‑Ku Lee,Kyu‑Hyun Park,Soon‑Jik Hong,Jung Gu Lee 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.3

The weldability window in magnetic pulse welding (MPW) is proposed for the end-closure joining of HT-9 steel tubularworkpieces. Based on both theoretical and experimental investigations, the impact velocity of the flyer tube at the momentof collision had a dominant effect on the bonding characteristics of the resultant joints and the optimal impact velocity wasestimated to be in the range of 265–290 m/s in this alloy system. Under the optimal process conditions, no leak was detectedduring helium leak testing. Moreover, the integrity of the joint interface was preserved until the tube section ruptured duringinternal pressure burst testing. For HT-9 steel, the ductile δ-ferrite phase produced by the localized interfacial melting duringMPW acted as an effective obstacle to crack propagation, thereby enhancing the fracture resistance of the joint interface. Allof the results demonstrated the high integrity and durability of the HT-9 steel tube assembly fabricated by the MPW process.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

지리산국립공원 심원계곡 생태경관 복원공사지역 식생 변화

정태준 ( Tae-jun Jung ),김연경 ( Yeon-Gyeong Kim ),김영진 ( Young-jin Kim ),정명희 ( Myung-hee Jung ),박경희 ( Kyoung-hee Park ),신창근 ( Chang-keun Shin ),박선홍 ( Seung-hong Park ),김영선 ( Young-sun Kim ) 한국환경생태학회 2021 한국환경생태학회지 Vol.35 No.3

본 연구는 지리산국립공원 심원계곡 생태경관 복원공사지역의 모니터링 결과를 분석하여 체계적인 복원관리를 도모할 수 있는 기초자료를 확보하는데 그 목적이 있다. 복원사업이 완료된 2017년도에 식생 모니터링을 위한 조사구 12개소와 대조구 4개소를 설치하였고, 2017년과 2020년의 상대우점치, 종다양도지수, 유사도 등의 변화를 분석하였다. 복원사업 시 수목이 식재되었던 조사구는 종다양도지수가 0∼1.4552로 나타났고, 대조구와의 유사도지수에서는 1개 조사구가 1.32%로 분석된 것을 제외하고 모두 0%로 나타났다. 조사구의 종다양도지수 및 유사도지수가 매우 낮은 것은 복원사업 시 식재된 수목이 고사하거나 멧돼지 피해, 유수에 의한 침식으로 유실되는 등의 영향으로 판단되었다. 반면 복원사업 시 수목이 식재되지 않은 미식재 조사구는 종다양도지수가 0.9538∼2.3222로 나타났고, 유사도지수는 최대 8.33%까지 분석되었다. 국립공원 생태경관 복원공사지역의 복원 공법 개발을 위한 장기 모니터링과, 미식재 조사구의 천이과정을 분석하는 지속적인 연구가 필요하다. This study aims to obtain basic data for systematic restoration by analyzing the monitoring results of the Shimwon Valley Ecological Landscape Restoration Project area in Jirisan National Park. In 2017, when the restoration project was completed, 12 monitoring plots and 4 control plots were installed for vegetation monitoring, and changes in the relative dominance, species diversity index and similarity between 2017 and 2020 were analyzed. The species diversity index of the surveyed areas where trees were planted during the restoration project was 0-1.4552, and the similarity index with the control group was 0% except for one survey area at 1.32%. The very low species diversity index and similarity index in the survey areas were attributed to the loss of trees planted during the restoration project due to death, damage by wild boars, or erosion by running water. On the other hand, the species diversity index was 0.9538-2.3222 in the monitoring plot where no tree was planted, and the similarity index was analyzed to be as high as 8.33%. It is necessary to continue the long-term monitoring for the development of ecological landscape restoration methods in the national park and analysis of the succession in monitoring plots where no trees were planted.

Clinical usefulness of infrared thermal imaging as a non-invasive screening test for diagnosis of vascular malformations

( Chihyeon Sohng ),( Jun Hong Park ),( Won Kee Lee ),( Jun Young Kim ),( Yong Hyun Jang ),( Weon Ju Lee ),( Seok-jong Lee ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.2

Background: Infrared thermal imaging (ITI), aka thermography, has been used widely in medicine, but been studied rarely its clinical application in vascular malformations (VMs). Objectives: This study investigated validity and usefulness of ITI as a new screening test to differentiate between capillary malformation (CM) and arteriovenous malformation (AVM). Methods: This study included 50 patients with VMs who conducted ITI between 2011 and 2018. They were divided into two groups; CM and AVM, and those with Parkes-Weber syndrome (PWS) were also included in AVM group. Temperature difference (ΔT) between lesional and contralateral non-lesional area was compared using ITI to calculate the maximum ΔT (ΔTmax). The receiver operating characteristic (ROC) curve was then plotted to determine optimal cutoff value of ΔTmax. Results: Of the total 50 patients, 34 were finally diagnosed with CM, and 16 AVM (12 pure AVM, and 4 PWS). AVM group had significantly higher ΔTmax (2.57±1.23°C) than CM group (0.69±0.50°C).The area under the curve of ΔTmax for diagnosis of AVM versus CM was 0.938. The sensitivity and specificity were showed 87.5% and 94.1% (LR+, 14.87; LR-, 0.13) in cutoff value of ΔTmax 1.39°C, and 81.3% and 97.1% (LR+, 27.62; LR-, 0.19) in cutoff value of ΔTmax 1.42°C. Conclusion: The value of ΔTmax measured by ITI was useful to distinguish AVM from CM, so ITI can be employed as a new non-invasive differential screening test for uncertain VMs.

관동맥질환에서 저밀도 지단백 입자 크기의 분포

임효영,김인숙,승기배,강동헌,전두수,장기육,박준철,이수영,홍순조,최규보 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.8

외부 프리스트레싱으로 보강한 철근 콘크리트 T-형보의 STM 해석

박홍용,박영준 명지대학교 공학기술연구소 1994 공학기술연구소 논문집 Vol.9 No.-

Most of the concrete structures which were built 20's years ago and have been used till now have become obsolete. Particularly, bridges designed as 2nd or 3rd level are required repairing and reinforcing or demolition because of rapidly increasing traffic and vehicles heavier. Recently, the advanced countries including France have made a satisfactory success in constructing the long-span bridges and strengthening the flexural strength of the existing structures by the external prestressing. This paper carried out on externally prestressed beam by the STM. More exactly, Variation of the load carrying capacity depended on a deviator location was studied by the STM analysis under the ultimate load condition and by the FEM analysis under the service load condition. The test model was 3rd level bridge which had been made of R.C T-sections 30's years ago. As a result of the STM analysis derived a simple fomula to get the value of the required external prestressing force and could be confined the extend of that. On the contrary, the FEM analysis presented the mechanical behavior that does the better, when the tendon is prestressed along the beam with the large eccentricity and with the bigger horizontal angle near the supporting point. In view of theses facts, before designing the concrete structures with external prestressing. It is neccessary to ivestigate the influences of the deviators under the both ultimate load condition and service load condition.

王驥德 《曲律》에서 李漁 《閒淸偶寄》로의 戱曲理論

朴泓俊 한국중국어문학회 2000 中國文學 Vol.33 No.-

在中國古典戱曲硏究者當中, 王驥德和李漁的成就已達到相當的水平. 一般認爲, 王驥德銳曲律流是總結傳統的油學, 而李漁銳瑪情偶寄首先把劇學的槪念引進了纖油界. 這樣看來, 王驪德和李漁戱曲理論的內酒, 好像是兩個不同的東西, 就是說他們追求的戮總, 一個是以曲文爲主的曲學, 男一個是以舞臺搬演爲主的劇學. 某實, 王驥德和李漁活動的時代, 只有半個世紀的差隔. 可以說, 他們在同樣的戱油環境裏生存而活動約. 所狀在上面論述的一種曲學和劇學的鮮明的對比, 可以說是太勉强的, 不符實際的. 寶際上, 王驥德和李漁都是面臨着勳曲創作案頭化的不良氣風, 而要擺脫這樣的環境而專心地努力,而樹立了一種有體系的纖曲理論著作. 在本文中, 我首先從兩人和兩個理論著作的差異出發, 而比較兩個著作的基本思路和追求. 而下面繼續從纖油舞臺, 纖油結構, 纖油資嶺的三懼側疆來比較. 從這比較當中, 我可以發琨這兩理論著作是有相當的關聯. 就是說, 王驥德<曲律>的基本思路, 從李漁的詞<情偶寄>的發揮, 達到完 整的階段. 當然, 王驥德<曲律>創拘內容是基本的思路, 而李漁的瑞情偶寄達相當有賤系的而有-定的內容深度的. 但我們不可忽略的是, 這兩理論著作的基本相關性. 如果我只是强調這兩著作的差異, 而輕視他們之間的關聯性. 那就意味着, 我們認識的片面性. 所以從兩理論著作的差異和關聯, 我們可以達到當時理論界的眞實面貌.

신체지각이 창의적 사고에 미치는 효과

박준희,김홍남,김갑회 朝鮮大學校 스포츠科學硏究所 2003 스포츠科學硏究 Vol.14 No.-

Minimized subjective prejudice of investigator who use triangularity verification (triangulation), examination(member checks) between constituent, and specialist conference at source collection and analysis process Study finding is same as following. First, original thinking process of newcomers who appear at body earth's crust program application can be summarized by earth's crust about discovery about past problem or congnition, force, that bring unconsciousness to ceremony, body regulation, possession, new experience, problem institution and solution discovery, change of body interior, comprehension for body etc. for dancing major persons. Second, effect neted by taking part in body earth's crust training effect on newcomers' each person's action change body regulation ability elevation. body regulation ability elevation can lift observation ability enhancement, regulation ability elevation for waist muscle, body current and something extra of life, and grasping about bodily flowing etc. about earth's crust ability elevation exalted for muscle and body, that is sharp about change of body interior, that move and effect by group activity proves comparison observable ability and lift ability elevation that can find controversial point can. Third, with original casualty and body Perception between to connect is proved concretely be but truth that there is inseparable relation with body Perception and original casualty at least appeared.

임플란트 주위 조직 보존을 위한 임플란트 경부의 디자인에 관한 고찰

김홍준,김지환,김성태,이재훈,박영범 大韓齒科保存學會 2011 Restorative Dentistry & Endodontics Vol.36 No.6

연구 목적: 임플란트 식립 후 변연골 흡수에 따라 임플란트 주위 연조직이 재구성되며, 이에 따라 치료의 예후 및 심미성 등에 영향을 주게 된다. 그러므로 임플란트 경부 주위 골조직 보존을 위한 임플란트 경부에 다양한 디자인이 연구되고 있다. 본 고찰의 목적은 초기 변연골 흡수의 원인과 이에 따른 임플란트 주위의 연조직 변화에 대해 고찰하고, 어떠한 임플란트 경부 디자인이 임플란트 주위 조직의 보존에 유리한 지 알아보고자 한다. 연구 재료 및 방법: Pubmed database에서 임플란트 초기 변연골 흡수의 원인과 관련된 논문과 임플란트 경부의 여러 디자인에 관한 논문을 검색하여 분석하였다. 임플란트 경부 디자인은 one piece implant, two piece implant, internal hex abutment, external hex abutment, taper joint connection, butt joint connection, scalloped design abutment, platform switching concept에 관해 검토하였다. 결과: 초기의 임플란트 주위 조직 보존에 대하여 one piece implant가 two piece implant보다 유리한 것으로 여러 임상적, 실험적 연구가 있다. Two piece implant에서는 internal hex abutment가 external hex abutment보다, taper joint connection가 butt joint connection보다 유리할 것으로 보여진다. Scalloped design abutment에 대해서는 논쟁의 여지가 있어 더 많은 연구가 필요할 것으로 판단된다. Platform switching concept은 그 원인이 명확히 밝혀지지는 않았으나 임상적, 실험적으로 초기 임플란트 주위 조직 보존에 대해 유리한 것으로 판단된다. 결론: 임플란트 경부의 디자인마다 각각의 장단점이 있고 추가적인 연구가 더 필요한 제한이 있지만 현재까지의 선행 연구들을 분석 종합해 보면 초기 임플란트 주위 조직 보존을 고려한다면 가능한 경우 one piece implant가 유리할 것으로 판단되며, 보철적인 문제나 다른 이유로 인하여 two piece implant를 고려할 경우 platform switching concept, internal connection abutment, taper joint connection을 이용하는 것이 임플란트 주위 조직 보존에 좀더 유리할 것으로 사료된다 Purpose: The peri-implant soft tissue is remodeled by the initial marginal bone resorption affecting the prognosis and esthetic result of treatment. Thus various designs on implant neck design are studied to preserve peri-implant bone. The purpose of this study is to review on the causes of initial marginal bone resorption, the configuration of peri-implant soft tissue, and the implant crestal module favorable in preserving peri-implant tissue. Materials and methods: The studies on the causes of initial marginal bone resorption and the implant crestal modules are researched and reviewed using Pubmed database. The implant crestal modules including one piece and two-piece implant, internal and external hex abutment, taper and butt joint connection, scalloped design abutment, and platform switching concept are reviewed. Results: A number of clinical and experimental studies preferred one piece implant to two-piece in preserving initial peri-implant tissue. For two piece implants, internal hex abutment and taper joint connection appear more favorable than external hex abutment and butt joint connection relatively. Controversial issues still exist on scalloped design requiring more studies on it. Although the rationale is not certain, the concept of platform switching seems favorable in preserving initial peri-implant tissue based on clinical and experimental studies. Conclusion: Each implant crestal module contains its own advantages and disadvantages with various controversial issues. In the aspect of preservation of initial peri-implant tissue, however, one-piece implant seems beneficial. In cases when two-piece implant is more appropriate due to prosthodontic concerns or any other problems, the application of platform switching concept, internal connection abutment, and taper joint connection may be favorable for the preservation of peri-implant tissues.