구조적 불연속에 기인하는 원통구조물의 응력집중현상에 관한 유한요소법에 의한 연구

김두만,정세헌 한국산업안전학회 1988 한국안전학회지 Vol.3 No.2

The stress concentration phenomena due to the structural incontinuty are studied by finite element method. In this study, a circular cylinder is treated. Under the axial load, the membrance action is dominate and the 24 D.O.F. cylindrical membrane finite element is used. The assembly of this element can successfully represent the original structure geometrically. The internal displacement function is such organized that the inter element compatibility condition is fully satisfied. In this study, the stress concentration factors due to the presence of a hole on the cylinder wall are obtained, and the factors versus the location of the hole is computed and plotted. It is found that the hole effect on the stress concentration disappears beyond the neighboring region of the hole size from the edge of the hole. Those results are useful for practical design in determining the region where the re-inforcing is necessary.

항공기 착륙장치의 동특성해석 및 최적설계

김두만(Doo-Man Kim),임경호(Kyoung-Ho Lim),황재혁(Jai-Hyuk Hwang),전제춘(Je-Choon Jeon),고한영(Han-Young Ko),이환규(Hwan-Kyu Lee) 한국항공우주학회 1993 韓國航空宇宙學會誌 Vol.21 No.4

당뇨병의 대혈관합병증

김두만 사단법인 한국당뇨협회 1995 당뇨 Vol.67 No.-

KCI 101 내진설계위원회

김두기(Dookie Kim),강현구(Thomas H.-K. Kang),손윤기(Younki Son),이정윤(Jung Yoon Lee),엄태성(Tae Sung Eom),윤현도(Hyun-Do Yun) 한국콘크리트학회 2022 콘크리트학회지 Vol.34 No.5

Comparison of Three, Motion-Resistant MR Sequences on Hepatobiliary Phase for Gadoxetic Acid (Gd-EOB-DTPA)- Enhanced MR Imaging of the Liver

김두리,이정섭,최국명,김승형,고명주,송병철,이무숙,이경렬,고수연,김봉수 대한자기공명의과학회 2017 Investigative Magnetic Resonance Imaging Vol.21 No.2

Purpose: To compare three, motion-resistant, T1-weighted MR sequences on the hepatobiliary phase for gadoxetic acid-enhanced MR imaging of the liver. Materials and Methods: In this retrospective study, 79 patients underwent gadoxetic acid-enhanced, 3T liver MR imaging. Fifty-nine were examined using a standard protocol, and 20 were examined using a motion-resistant protocol. During the hepatocyte-specific phase, three MR sequences were acquired: 1) gradient recalled echo (GRE) with controlled aliasing in parallel imaging results in higher acceleration (CAIPIRINHA); 2) radial GRE with the interleaved angle-bisection scheme (ILAB); and 3) radial GRE with golden-angle scheme (GA). Two readers independently assessed images with motion artifacts, streaking artifacts, liver-edge sharpness, hepatic vessel clarity, lesion conspicuity, and overall image quality, using a 5-point scale. The images were assessed by measurement of liver signal-to-noise ratio (SNR), and tumor-toliver contrast-to-noise ratio (CNR). The results were compared, using repeated posthoc, paired t-tests with Bonferroni correction and the Wilcoxon signed rank test with Bonferroni correction. Results: In the qualitative analysis of cooperative patients, the results for CAIPIRINHA had significantly higher ratings for streak artifacts, liver-edge sharpness, hepatic vessel clarity, and overall image quality as compared to, radial GRE, (P < 0.016). In the imaging of uncooperative patients, higher scores were recorded for ILAB and GA with respect to all of the qualitative assessments, except for streak artifact, compared with CAIPIRINHA (P < 0.016). However, no significant differences were found between ILAB and GA. For quantitative analysis in uncooperative patients, the mean liver SNR and lesion-to-liver CNR with radial GRE were significantly higher than those of CAIPIRINHA (P < 0.016). Conclusion: In uncooperative patients, the use of the radial GRE sequence can improve the image quality compared to GRE imaging with CAIPIRINHA, despite the data acquisition methods used. The GRE imaging with CAIPIRINHA is applicable for patients without breath-holding difficulties.

학부형이 유치원 아동의 시각관련 행동관찰을 통해 시력저하를 발견할 수 있을까?

김두리,이현 대한시과학회 2020 대한시과학회지 학술대회 Vol.2020 No.01

Effect of Having a Usual Source of Care on Medical Expenses – Using the Korea Health Panel Data

김두리,김솔잎,박혜경,하인혁,정보영,류원형,이상일,성낙진 대한의학회 2019 Journal of Korean medical science Vol.34 No.35

Background: There is a controversy about the effect of having a usual source of care on medical expenses. Although many studies have shown lower medical expenses in a group with a usual source of care, some have shown higher medical expenses in such a group. This study aimed to empirically demonstrate the effect of having a usual source of care on medical expenses. Methods: The participants included those aged 20 years and older who responded to the questionnaire about “having a usual source of care” from the Korean Health Panel Data of 2012, 2013, and 2016 (6,120; 6,593; and 7,598 respectively). Those who responded with “I do not get sick easily” or “I rarely visit medical institutions” as the reasons for not having a usual source of care were excluded. The panel regression with random effects model was performed to analyze the effect of having a usual source of care on medical expenses. Results: The group having a usual source of care spent 20% less on inpatient expenses and 25% less on clinic expenses than the group without a usual source of care. Particularly, the group having a clinic-level usual source of care spent 12% less on total medical expenses, 9% less on outpatient expenses, 35% less on inpatient expenses, and 74% less on hospital expenses, but 29% more on clinic expenses than the group without a usual source of care. Conclusion: This study confirmed that medical expenses decreased in the group with a usual source of care, especially a clinic-level usual source of care (USC), than in the group without a usual source of care. Encouraging people to have a clinic-level USC can control excessive medical expenses and induce desirable medical care utilization.

모더니즘과 베케트의 시작(詩作) - 초기 시 「에뉘에치 I Enueg I」을 중심으로 -

김두리 ( Kim Duri ) 세계문학비교학회(구 한국세계문학비교학회) 2020 世界文學比較硏究 Vol.71 No.-

본 논문은 사뮈엘 베케트의 초기 시 「에뉘에치 I」을 대상으로 그의 시작(詩作)을 분석하는 데 목적이 있다. 시집 『에코의 뼈들 그리고 다른 침전물들Echo’s Bones and Other Precipitates』(1935)에 실린 그의 시는 모더니즘의 영향 하에 폭넓은 상호텍스트성을 보인다. 시는 이를테면 성경, 나르키소스와 에코의 신화, 단테의 『신곡La Divina Commedia』, 조이스의 『피네간의 경야Finnegans Wake』 등을 암시할 뿐 아니라 랭보의 「야만Barbare」에서 반복구를, 베케트 자신이 번역한 「취한 배Drunken Boat」에서 어휘와 구조를 가져오는 등 창작과 번역의 경계를 넘어선다. 또한 그의 장편소설 『그저 그런 여인들에 관한 꿈Dream of fair to Middling Women』에서 시의 구절이 산문으로 다시 쓰였다는 점을 통해 타 작가의 작품뿐 아니라 자신의 작품까지 아우르는 베케트 특유의 글쓰기를 엿볼 수 있다. 「에뉘에치 I」 분석은 번역과 유사한 성격을 띠는 베케트의 집필 방식을 구체적으로 보여주고, 나아가 영미 모더니즘의 영향과 유럽의 실험 정신을 발판 삼아 자신만의 침묵의 시학을 완성시켜나갔던 작가 베케트의 문학 세계를 이해할 수 있도록 도와줄 것이다. 본 논문은 베케트의 시를 구성하고 있는 다른 텍스트들을 바탕으로 시 읽기를 시도함으로써 시에 대한 새로운 해석의 장을 마련하는 데 기여할 것이다. This study aims to examine the poetics of Samuel Beckett with a particular focus on one of his early works “Enueg I” written in the 1930s. This poem, which was published in his collection of poetry titled Echo’s Bones and Other Precipitates (1935), demonstrates broad intertextuality under the influence of modernism. Not only does it imply a variety of well-known works, such as the Bible, the myth of Narcissus and Echo, The Divine Comedy by Dante Alighieri, and Finnegans Wake by James Joyce, but it has also taken the refrain of “Barbare”, a prose poem by Arthur Rimbaud, and some of the words and structures from “Drunken Boat” (1932), a Rimbaud’s poem translated by Beckett himself, crossing the borderline between creation and translation. Moreover, its verses are re-written in prose from Beckett’s novel Dream of fair to Middling Women, which reflects his unique writing style, encompassing the works of other writers as well as his own. In “Enueg I”, Beckett describes the narrative movement shifting between move and stop through the steps of “I,” who am walking along the Grand Canal in Dublin towards the western suburbs. On the very path, we discover the narrator divided like “Narcissus” and the figure of “Echo” hovering around him. While a series of intense images and repeated sounds delicately portray the narrator’s painful inner side and nightmarish scenes, Beckett writes a new version of Rimbaud’s “Barbare” with the River Liffey that spews sewage on the background. This study is significant in that it takes a closer look at Beckett’s poetry as it presents “Enueg I” with its intertexts and that it predicts the poetics of silence that appears in his later works through the relationship between the subject and the other and through the distrust in the language, which are distinctively featured in his texts.

C-ITS 통신망 구축을 위한 통신 기술 동향 및 국내 C-ITS 통신 규격 선정에 대한 연구

김두리(DooRi Kim),김모세(MoSe Kim),김기천(KeeCheon Kim) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.6

기존 ITS의 한계를 극복하고 최근 C-ITS 사업이 확장됨에 따라 사고를 방지하는 안전 운전과 사고를 빠르게 대응하여 2차 사고를 막을 수 있는 교통체계가 설립되고 있다. 단방향으로 정보를 수집하는 ITS와 달리 C-ITS는 차량과 차량, 차량과 인프라 간 양방향으로 정보를 공유할 수 있어 교통안전 관리에 더욱 효과적이다. 성공적인 C-ITS의 상용화를 위하여 국내 실정에 맞는 V2X 기술의 통신 규격의 결정이 필요하다. 본 논문에서 국내 V2X 통신 방식인 WAVE와 C-V2X의 차이점을 기술하고 국내 C-ITS 통신 규격 전망에 대해 소개한다.

가정간편식(HMR) 활용을 위한 수프용 양파 플레이크 제조 및 품질 특성

김두리(Duri Kim),천지연(Ji-Yeon Chun) 한국식품영양과학회 2021 한국식품영양과학회지 Vol.50 No.2

본 연구에서는 가정간편식용 수프에 첨가되는 양파 플레이크를 제조하기 위한 데치기 공정을 확립하고 이를 통해 제주산 농산물을 이용한 가정간편식용 수프 개발 시 첨가되는 양파 플레이크를 생산하기 위한 기초자료를 제공하고자 다양한 온도와 시간에 따른 양파의 색도, 수분활성도, 갈변도, pH, 가용성 고형분(Brix), 재복원율, 총 페놀 함량을 측정하였다. 데치기 조건에 따른 양파 플레이크의 수분활성도는 처리구별 큰 차이를 보이지 않았으며, 색도는 50°C 데치기 처리구가 70°C 데치기 처리구에 비해 L값이 증가하였고 a값이 감소하였다. 또한 저온에서 단시간 데치기가 양파 플레이크의 갈변을 억제하는 것으로 관찰되었다. pH와 가용성 고형분 함량은 데치기 온도와 시간이 증가할수록 감소하는 경향을 보였으며 재복원율은 70°C의 높은 온도를 이용하여 데치는 경우 높은 재복원율을 보였다. 총 페놀 함량은 데치기 온도와 시간이 증가할수록 감소하는 경향을 보였다. 결론적으로 본 연구에서는 pH가 낮아 미생물의 증식을 억제할 수 있는 70°C를 데치기 온도의 최적으로 선정하였고, 이 온도에서 데치기 시간에 따른 물리적, 영양학적 검사를 비교한 결과 데치기 시간이 증가할수록 재복원율이 높아졌지만 가용성 고형분 함량은 낮아지는 경향을 나타냈다. 또한 열처리 효율성과 상업적으로 이용성을 고려하여 1분 동안 처리하는 것을 최적으로 선정하였다. 이는 제주형 HMR 제품을 개발하는 데 기초자료로 활용될 수 있을 것으로 판단되며 양파플레이크를 수프에 적용하는 추가적인 연구가 필요할 것으로 사료된다. This study was undertaken to optimize the blanching process for producing onion flakes generally added in solid type HMR soup. Briefly, peeled and chopped onions were water-blanched at various temperatures and times (50, 60, 70°C/ 1, 2, 3 min), followed by hot air-blast drying (60°C, 9 h). Results revealed that the 50°C blanched treatment had a higher L-value and lower a-value than the 70°C blanched treatment. Moreover, the pH value, Brix, and total phenolic contents of onion flakes showed a dose-dependent decrease with increasing blanching temperature and time. Blanching at low temperature for a shorter time was effective in preventing the browning of onion flakes. In blanching at 70°C, the rehydration ratio was increased according to the increase of blanching time. Taken together, the results of this study reveal that water blanching at 70°C for 1 min is the optimal pre-treatment condition for commercial processing of onion flakes, wherein the nutritional properties are optimally retained.