모래지반에서 팽창각에 따른 연속기초와 원형기초의 지지력계수 N_γ와 형상계수에 대한 수치해석 연구

김동준,윤준웅,지성현,최재형,이진선,김동수,Kim, Dong-Joon,Youn, Jun-Ung,Jee, Sung-Hyun,Choi, Jaehyung,Lee, Jin-Sun,Kim, Dong-Soo 한국지반공학회 2014 한국지반공학회논문집 Vol.30 No.1

모래지반의 지표면에 위치한 거친 바닥면을 가진 강체 연속기초와 원형기초에 대하여 수치해석을 이용하여 팽창각 변화에 따른 지지력계수 $N_{\gamma}$와 형상계수를 구하였다. 양해법(explicit method)에 기반한 유한차분해석을 이용하여 지지력계수를 산정하기 위한 수치모델과 해석절차를 개발하고, Mohr-Coulomb 소성모델을 이용하여 다양한 내부마찰각(${\phi}$)과 팽창각(${\psi}$) 범위에 대하여 지지력계수를 도출하였다. 팽창각이 감소됨에 따라 지지력도 감소하는 것으로 나타났으며, 보편적인 지지력계수 제안식들이 가정하고 있는 관련흐름법칙(associated flow-rule)이 적용된 경우(${\psi}={\phi}$)를 기준으로 비관련흐름법칙(nonassociated flow-rule)이 적용된 경우(${\psi}$ < ${\phi}$)의 상대적인 지지력 비율을 산출하였고, 일반적인 모래에 대한 관계식을 제안하였다. 원형기초의 형상계수는 연속기초의 평면변형률 조건의 고려 여부에 따라 크게 변하였으며, 평면변형률 조건을 고려하여 내부마찰각을 증가시킨 경우가 기존의 실험 결과와 유사한 경향을 나타내었다. 형상계수 제안식들의 경향이 차이를 나타내는 원인에 대하여 고찰하고 설계시 적용 방안을 제시하였다. Bearing capacity factor $N_{\gamma}$ and shape factor were studied for rigid strip and circular footings with a rough base on sand by numerical modelling considering the effect of dilation angle. The numerical model was developed with an explicit finite difference code. Loading procedures and interpretation methods were devised in order to shorten the running time while eliminating the exaggeration of the reaction caused by the explicit scheme. Using the Mohr-Coulomb plasticity model with associated (${\psi}={\phi}$) and nonassociated (${\psi}$ < ${\phi}$) flow-rules, the bearing capacity factor $N_{\gamma}$ was evaluated for various combinations of internal friction angles and dilation angles. Bearing capacity factor decreased as the dilation angle was reduced from the associated condition. An equation applicable to typical sands was proposed to evaluate the relative bearing capacity for the nonassociated condition compared to the associated condition on which most bearing capacity factor equations are based. The shape factor for the circular footing varied substantially when the plane-strain effect was taken into account for the strip footing. The numerical results of this study showed closer trends with the previous experimental results when the internal friction angle was increased for the strip footing. Discussions are made on the reason that previous equations for the shape factor give different results and recommendations are made for the appropriate design shape factor.

종자골이 감입된 족무지 지관절 탈구 -2예 보고-

김동준,문상호,서병호,공규민,Kim, Dong-Joon,Moon, Sang-Ho,Suh, Byoung-Ho,Kong, Gyu-Min 대한족부족관절학회 2006 대한족부족관절학회지 Vol.10 No.2

Irreducible dislocation of great toe interphalangeal joint with incarcerated sesamoid is a rare condition, with only a few cases reported in literature. We describe two cases of dislocation of interphalangeal joint which were diagnosed by plain radiographs and three dimensional computed tomography (3D-CT) and successfully treated with open reduction without excision of sesamoid through dorsal approach along with literature pertinent to this condition.

신생아 세균성 뇌막염의 원인균에 따른 치료와 예후

김동준,이광훈,이형원,김길현,이학수,Kim, Dong Joon,Lee, Gwang Hoon,Lee, Hyung Won,Kim, Gil Hyun,Lee, Hak Soo 대한소아감염학회 1997 Pediatric Infection and Vaccine Vol.4 No.1

목 적 : 신생아 세균성 뇌막염은 임상 증상이 비특이적이며 여러가지 신경학적 후유증을 남길 수 있는 질환으로 본 저자들은 원인균 특히 그람 양성균과 음성균에 의한 뇌막염을 비 교 분석하여 치료 및 예후의 개선을 도모하고자 본 연구를 시행하였다. 방 법 : 1991년 1월부터 1996년 6월까지 중앙 길병원 신생아 중환자실과 소아과 병동에서 뇌척수액 검사상 균이 배양되었거나 latex agglutination test상 균이 밝혀진 24례를 대상으로 후향적으로 분석하였다. 결 과 : 1) 환아의 분포는 남아 17명, 여아 7명이었고, 그람 양성균에 의한 뇌막염 환아의 평균 출생 체중과 재태 기간은 $2.91{\pm}0.79kg$, $38.4{\pm}2.74$주, 그람 음성균군에서는 $3.30{\pm}0.90kg$, $37.7{\pm}3.33$ 주로 두 군간에 유의한 차이는 보이지 않았다. 2) 선행 요인으로는 미숙아, 태변 착색, 조기 양막 파수, 산모 당뇨병, 임신성 고혈압 등이 있었으며, 임상 증상 및 증후로는 발열, 경련, 수유량 감소, 대천문 팽대 등이 있었고, 증상 발현 시기는 조기 발현형이 11례(그람 양성균 4례, 그람 음성균 7례), 지연 발현형이 13례 (그람 양성균 7례, 그람 음성균 6례)였다. 3) 원인균은 그람 양성균이 11례로 coagulase-negative staphylococci와 group B streptococci가 각 3례, Staphyolococcus aureus와 Streptococcus viridans가 각 2례, enterococci가 1례가 있었으며, 그람 음성균은 13례로 Escherichia coli가 7례, Klebsiella pneumoniae가 3례 Pseudomonas aeruginosa, Acinetobactor, Emterobacter가 각 1례씩 있었다. 4) 뇌척수액 검사상 백혈구 수치는 그람 음성균군에서 통계적으로 유의하게 높았으나 단백 수치와 당 수치는 두 군간에 통계적으로 유의한 차이를 보이지 않았다. 5) 뇌초음파 검사상 그람 양성균군에서는 7례(63.6%)에서, 그람 음성균군에서는 10례 (76.9%)에서 비정상 소견을 보였으나 두 군간에 뇌초음파 검사상 비정상 소견의 빈도에 있어서는 통계적으로 유의한 차이를 보이지 않았다. 6) 항생제 감수성 검사에서 그람 양성균군에서는 penicillin계통, 1세대 cephalosporin, vancomycin에, 그람 음성균군에서는 amikacin과 3세대 cephalosporin에 대해 비교적 높은 감수성을 보였다. 7) 사망율(병원내 사망이나 hopeless discharge)은 20.8%(5례)였으며, 예후는 그람 양성균 군과 그람 음성균군에서 통계적으로 유의한 차이를 보이지 않았다. 결 론 : 신생아 세균성 뇌막염은 그람 양성균과 그람 음성균 간의 빈도와 예후의 차이는 보이지 않았고 예후가 불량하므로 세균성 뇌막염이 의심되는 환아에서는 적극적인 치료가 필요하리라 사료된다. Purpose : Neonatal bacterial meningitis is the disease which clinical manifestations are nonspecific and several neurologic complications may occur. We studied neonatal bacterial meningitis, particularly in treatment and prognosis according to causative organisms -gram positive and gram negative bacteria- to assist in treatment of neonatal bacterial meningitis. Methods : We analysed twenty-four cases retrospectively who had been admitted in NICU or pediatric ward in Chung-ang Gil hospital from Jan. 1991 to Jun. 1996, and who had proven causative organisms in culture or latex agglutination[n test in CSF. Results : 1) The ratio of male to female was 2.4: 1. The mean birth weight and gestational age in cases with gram positive bacterial meningitis were $2.91{\pm}0.79kg$ and $38.4{\pm}2.74$ weeks and those in cases with yam negative bacterial meningitis were $3.30{\pm}0.90kg$ and $37.7{\pm}3.33$weeks respectively. There was no significant difference between the two groups. 2) The perinatal predisposing factors were pematurity, mecoinium staining amnionic fluid, matemal diabetes and pregnancy-induced hypertension, etc. The clinical manifestations Were fever, seizure, poor oral intake and fontanel bulging, etc. There were eleven cases with early onset bacterial meningitis(four cases by gram positive bacteria, seven cases by gram negative bacteria), and thirteen cases with late onset bacterial meningitis(seven cases by gram positive bacteria, six cases by gram negative bacteria). There was no significant difference between the two groups in terms of onset. 3) There were eleven cases with yam positive bacterial meningitis and they were coagulase-negative staphylococci(three cases), group B streptococci(three cases), Staphylococcus aureus(two cases), Streptococcus viridans(two cases), and enterococci(one case). And there were thirteen cases with gram negative bacterial menir gitis and they were Escherichia coli(seven cases), Klevsiella pneumoniae(three cases), Pseudomonas aeruginosa(one case), Acinetobactor(one case) and Enterobacter(one case). 4) The initial CSF WBC counts in cases with yam negative bacterial meningitis were significantly higher than those in cases with gram positive bacterial meningitis but the CSF protein and glucose levels were no significant difference in the two groups statistically. 5) The number of cases with abnormal findings in brain ultrasonography was seven in gram positive bacterial meningitis and ten in gram negative bacterial meningitis. 6) There were relatively high sensitivity to penicillin derivatives, the first generation cephalosporin and vancomycin in gram positive bacteria and to the third generation cephalosporin and amikacin in gram negative bacteria. 7) The mortality rate was 20.8%(5 cases were expired or discharged hopelessly). There was no significant difference between the two groups in prognosis. Conclusions : We recommend active treatment in noenatal bacterial meningitis to improve prognosis because the prognosis is poor.

TAURODONTISM

김동준,Kim, Dong-Joon 대한소아치과학회 1978 大韓小兒齒科學會誌 Vol.5 No.1

This is to report of a case of bilateral taurodontism of mandibular right & left 1st deciduous molars of 4 year-old female. Taurodontism is a morphologic condition of tooth, it seems to be caused by delayed or incomplete union of horizontal epithelial flaps of the epithelial diaphragm. This union is necessary in order to initiate dentinogenesis in the bifurcation area.

자녀장려세제의 경제적 효과 분석

김동준 ( Dong-joon Kim ),전승훈 ( Seung-hoon Jeon ) 한국재정정책학회 2020 財政政策論集 Vol.22 No.1

본 연구는 자녀장려세제가 자녀양육비 부담을 줄이는 효과가 있는가에 대해 논의하였다. 또한 본 연구는 자녀장려금이 분배 및 빈곤에 미치는 영향 분석을 통해 자녀장려세제를 형평성 측면에서 분석하였다. 본 연구의 분석결과에 따르면 자녀장려세제의 도입은 부부의 근로 및 사업소득에는 유의한 영향을 미치지 못하지만, 가구의 가처분소득, 소비지출, 그리고 교육비지출을 유의미하게 증가시켰다. 자녀장려세제 도입 이후 가구의 가처분소득과 소비지출이 증가하였다는 것은 자녀양육 부담이 일정정도 경감되었다는 것으로 해석 가능하다. 특히 분석결과 자녀장려금의 상당 부분이 자녀교육비 등 자녀를 위한 목적에 사용되고 있는 것으로 나타났다. 이상의 분석결과는 자녀장려금이 최초 도입 목적을 일정정도 달성하고 있음을 보여준다. 자녀장려세제는 분배 및 빈곤을 개선하는 효과를 가지지만, 그 정도는 미미하였다. 이는 자녀장려금의 규모가 경상소득의 1%를 조금 넘는 수준이라는 점, 그리고 본 연구의 분석대상인 2015~2017년 기간 중국민기초생활보장법에 따른 생계급여 수급자에게 자녀장려금 신청자격이 주어지지 않아 저소득계층 상당수가 자녀장려금을 받을 수 없었다는 점 등에 기인한 것으로 분석된다. This study analyzed the effects of child tax credit(CTC) on the child support burden and labor incentive during the 2015-2017. And this study also analysed the effects of CTC on income distribution and poverty rate. According to the results of this study, the introduction of the CTC did not significantly increased labor income of household head and his(or her) spouse, but significantly increased household disposal income and consumption expenditure. The increase in household disposal income and consumption expenditure can be interpreted as a reduction in the child support burden on the household. The results also show that education expenditure increased more rapidly than consumption expenditure. This implies that a large portion of CTC was used for children's education purposes. CTC has the effects of improving income distribution and decreasing poverty rate, but very little. These are because the amount of CTC is just over 1% of Household current income and low income earners who received livelihood benefit under the National Basic Livelihood Guaranteed Act were not eligible to apply for CTC during the 2015-2017.

복합민자역사 장소성 형성의 인과구조에 관한 연구

김동준(Kim Dong Joon),박재홍(Park Jae Hong) 한국지역개발학회 2017 韓國地域開發學會誌 Vol.29 No.5

In recent years, the Ministry of Land, Infrastructure and Transport is implementing a project to reinforce and promote the local community and urban regeneration. Under such a project, stations of railways are in the trend of having the attribute of the strong sense of the landmark place, beyond merely the role as stations. As a means to increase a few public resources, in the process of implementing such a project, the method of developing the 3rd sector is being pursued where the public and private sectorsco-invest to establish and manage SPC, utilizing private funds. Given this fact ,it is considered that conducting there search about reinforcing private-invested railroad station complexes is indispensible, in case when the paradigm of developing stations of railways is led by the private sectors. Also considering that a sense of place is formed according to the spatial structure of stations of railways and the neighborhood areas, it is deemed that having an unequivocal awareness of a sense of place and devising measures to establish private-invested railroad station complexes based on it are urgent in order to reinforce and boost private-invested railroad station complexes and competitive edge. In this regard, the research study is going to analyze the cause and effect (causality) of establishing a sense of place, based on the substantive analysis of Yeongdeungpo and Cheongryangri stations, that is, private-invested railroad station complexes well-known as the major metropolitan areas, in an effort to reinforce private-invested railroad station complex. Also, the study is going to present the policy implication through a comparative analysis with the precedent study related to developing station complexes and a sense of place. The outcome of the substantial analysis how that first of all the private-invested railroad station in Cheongryangri has the extremely strong structure of a sense of place, while the private-invested railroad station in Yeongdeungpo has the relatively weak structure of a sense of place. Based on it, the composition of land use is as follows. First, in the case of the private-invested railroad station in Cheongryangri against the one in Yeongdeungpo, commercial facilities are not only reinforced but also the internal physical space is well-established in the following aspects: giving accessibility, promoting centers, addressing the problem with local severance, and connecting metropolitan parks with green belt, which creates a smooth spatial harmony with the surrounding areas. Second, regarding hinterland, it is identified that in the case of Cheongryangri, the surrounding areas have the strong traffic, commercial and housing function, while in the case of Yeongdeungpo, the commercial function becomes the main regional attribute. In conclusion, it is considered that connecting solid land use on a physical level with hinterlands on a socioeconomic level brings about a different consequence in the structure of establishing a sense of place between the two stations. Taking it into account, it can be understood that private-invested railroad station complexes must be developed in the constant network with physical linkage and socioeconomic relations, under the premise of the establishment of planning and the spatial realm of railway station spheres. As the policy implication to be considered on the basis of the outcomes, it is confirmed that in order to reinforce private-invested railroad station complexes, The structural relations of establishing a sense of place must be formed by developing metropolitan areas in harmony with solid land use reflecting local attributes on a physical level, and hinterlands on a socioeconomic level.

MPEG-2 기반영상의 시스템 영역에서의 편집을 위한 PES 영역에서의 스트림 splicing에 관한 연구(비교, 분석)

김동준(Dong-joon Kim),최윤식(Yoon-sik Choe) 대한전자공학회 2002 대한전자공학회 학술대회 Vol.2002 No.6

적응형 중복도 기반 순차 번호 부여 방식

김동준(Dong Joon Kim),신우철(Woo Cheol Shin),박진경(Jin Kyung Park),주재환(Jea Hwan Ju),최천원(Cheon Won Choi) 대한전자공학회 2002 대한전자공학회 학술대회 Vol.2002 No.11

코로나팬더믹 이후 관광산업 발전방안 연구

김동준(Kim, Dong-Joon),최현준(Choi, Hyun-Jun),조환기(Cho, Hwan-Ki),김광용(Kim, Kwang-yong) 한국호텔외식관광경영학회 2020 호텔경영학연구 Vol.29 No.4

카지노 서비스품질이 고객만족 및 재방문의도에 미치는 영향

김동준(Dong-Joon Kim) 한국엔터테인먼트산업학회 2012 한국엔터테인먼트산업학회논문지 Vol.6 No.3

본 연구는 카지노를 방문한 고객들의 서비스품질이 고객만족과 재방문의도에 미치는 영향에 대해 알아보고자 실증분석을 실시하였다. 선행연구를 바탕으로 카지노 서비스품질의 측정항목을 도출하고 이를 활용하여 설문지를 통해 필리핀 Casino Widus를 방문한 고객들을 대상으로 분석을 진행하였다. 분석결과를 요약하면 첫째, 카지노 서비스품질이 고객만족에 미치는 영향관계에서 카지노 서비스품질의 5가지 요인(카지노시설, 딜러, 편리성, 음료, 접근성) 중 카지노시설과 접근성이 만족에 영향을 미치는 것으로 나타났다. 둘째, 카지노 서비스품질과 재방문의도 관계에서는 접근성, 카지노시설, 음료가 재방문의도에 영향을 미치는 것으로 나타났다. 마지막으로, 고객만족은 재방문의도에 영향을 미치는 것으로 나타났다. 결국, 카지노 방문객들의 카지노 이용에 있어 서비스품질은 고객만족과 재방문의도에 부분적으로 영향을 미치는 것을 알 수 있다. 연구결과를 바탕으로 국내 카지노에도 접근성, 시설, 음료 등에 대한 구체적인 접목으로 고객만족과 재방문의도를 향상시킬 수 있는 방안을 마련해야 할 것이다. The purpose of this study is to examine the effects of casino service quality on customer satisfaction and revisit intention. Therefore, this study investigated the effects of casino facility, dealer, convenience, beverage and accessibility on customer satisfaction and revisit intention through a demonstrative analysis. The results of the practical analysis can be summarized as follows. First, as for the mutual relation between casino service quality and customer satisfaction, the influence degree that casino facility and accessibility factor makes on customer satisfaction shows positive influence. Second, in case of relationship between casino service quality and revisit intention, factor of accessibility, casino facility and beverage influence on revisit intention. Third, as a result of interactive effect between customer satisfaction and revisit intention, customer satisfaction shows it positively effects on revisit intention. They have to invest their resources more efficiently making changes to casino service quality to increase the customer satisfaction and revisit intention.