열공형과 비열공형 피질하 혈관성 치매에서 위험인자의 차이에 관한 비교 연구

배희준,정지향,유경호,나덕렬,김상윤,최경규,양동원,손의주,이상도,김재우,박경원,김응규,이재홍,박미영,한일우,함동석,최문성,하충건,최성혜,이애영,이병철,한설희 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.2

Backgrounds and Objectives: Vascular dementia is a group of dementing disoders arising from various stroke syndrome. Among these. subcortical ischemic vascular dementia (SIVD) is regarded as a relatively distinct clinical entity. However, MRI patterns of SIVD are not homogenous. In some patients, lacunes are dominant, and in others, subcortical white matter changes are. This study was designed to compare risk factor profiles between SIVD with and without multiple lacunes. Methods: We divided 47 subjects (22 males, mean age. 68 years) recruited from VADAPET (Multicenter Trial For Evaluation Of The Changes In the PET Images Of Subcortical Vascular Dementia Patient) study into two groups one with more than 5 lacunes in deep gray matter (lacune group) and the other with 5 or less(non-lacune group) Clinical characteristics and laboratory findings of two groups were compared. Results: Nineteen of 47 patients (40%) belonged to the lacune group. The lacune and non-lacune groups d d not differ in the following variables: age, hypertension, diabetes mellitus, hyperlipidemia heart disease, history of stroke or TIA, history of trauma or major surgery, family history of hypertension stroke, or dementia, age at diagnosis of dementia, body mass index, white blood cell count, ESR, CRP, fibrinogen, hemoglobin A1C, total cholesterol. LDL cholesterol creatinine, proteinuria, glucosuria, and microhematuria. However, male sex, smoking alcohol. hemoglobin, and HDL cholesterol were possibly associated more with lacune group SIVD than with non-lacune group (p<0 1) Multivariate analyses revealed that smoking, hemoglobin, and HDL cholesterol were independent predictors of SIVD with multiple lacunes Conclusion: Our study suggests that SIVD with multiple lacunes may be significantly different in smoking habits hemoglobin, and HDL cholesterol from SIVD without multiple lacunes.

PWM을 이용한 트랙터 부착작업기의 자세제어

이성범,이홍주,황성준 안성산업대학교 2002 論文集 Vol.34 No.-

This study was conducted to control the posture of implement attached to tractor, which could make important effects on the working performance and accuracy. A tool bar, should be attached to the 3-point hitch, was designed to control the posture of implement by differentiating distances between one upper link and two lower links independently and simultaneously. By using PWM control method, the hydraulic fluid quantity was controlled proportionally according to the change of duty ratio with a high speed electronic solenoid valve. Computer simulation and fundamental test were also conducted for the developed posture control system using AMESim analysis tool The results of this study could be summarized as follows : 1. According to the results of computer simulation, major design parameters such as PWM control frequency, control agin, orifice diameter, and fluid pressure were determined as 30㎐, 1.5, 1.8㎜, and 10MPa, respectively. Time constant to make 100㎜ of stroke in load direction was about 0.55 seconds. 2. The tool bar, which was consisted of hydraulic cylinders and metal guides, was fabricated and tested for the performance of over all system. 1.6 seconds of response time of the control system was needed at inclination of 22°, and the performance of the posture control system was best at 150MPa of relief pressure, 1.5 of control gain, 20㎐ of PWM control frequency, and 2.2㎜ of orifice diameter, which did not represent considerable difference in compare with the results of computer simulation.

W/O 마이크로에멀젼에 의한 나노크기의 TiO₂/SiO₂ 합성에서 물/계면활성제의 몰 비(W_(0)) 영향 및 그 광분해 특성

이만식,주창식,이근대,홍성수 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.4

나노크기의 TiO₂/SiO₂입자는 음이온 계면활성제 AOT(sodium bis(2-ethylhexyl) sulfosuccinate)를 사용하여 W/O 마이크로 에멀젼에서 TTIP(titanium isopropoxide)와 TEOS(tetraethylorthosilicate)의 가수분해 반응에 의해 제조하였다. 그때 TEOS의 몰분율은 0.1이였다. 나노입자 제조시 W_(0)(H₂O/AOT)비에 따른 열적안정성, 표면적, 결정성 및 결정크기 등과 같은 물리적 특성은 TEM, XRD, BET, FT-IR, TGA-DTA 등을 사용하여 분석하였다. 또한 광촉매적 특성을 알아보기 위해 회분식 반응장치를 이용하여 p-니트로페놀의 광분해 활성을 조사하였다. 제조된 Ti0₂/SiO₂ 나노입자는 열처리 온도 105℃, 300℃에서 비결정구조를 가졌으며, 소성온도 800℃에서는 Ti0₂ 결정입자 내에 무정형의 SiO₂로 인해 열적 안정성이 증가되었고, 여전히 anatase 결정을 유지하였다. 그리고 Ti0₂/SiO₂(90/10) 입자에서 SiO₂ 결정은 관찰되지 않았다. 제조된 촉매는 대체로 구형이며 아주 균일한 분포를 갖는 것으로 관찰되었다. W_(0) 비가 증가할수록 결정크기는 증가되었고, 표면적은 감소하는 경향을 나타내었다. 또한 p-니트로페놀에 대한 광분해 활성은 순수한 Ti0₂ 보다 Ti0₂/SiO₂(90/10) 촉매가 우수하였다. Nanosized TiO₂/SiO₂ particles were prepared by hydrolysis of TTIP (titanium isopropoxide) and TEOT (tetra-ethylorthosilicate) in sodium bis (₂-ethylhexyl)sulfosuccinate (AOT) reverse micelles. The mole fraction of TEOS was 0.1. The physical properties, such as surface area. thermal stability, crystallite size and crystallinity according to W_(0), ratio have been investigated by TEM, XRD, BET, FT-IR, TGA and DTA. In addition. the photocatalytic degradation of p-nitrophenol has been studied by using batch reactor in order to compare the photocatalytic activity of prepared nanosized TiO₂/SiO₂, particles. It is shown that the XRD pattern of the particle heat treated at 105℃ and 300℃ indicates amorphous and the major phase of all the prepared particles were anatase structure. No significant rutile phase was observed although the calcination temperature at 800℃ and no peaks SiO₂ crystal were also observed for TiO₂/SiO₂ (90/10). The presence of amorphous SiO₂ in TiO₂/SiO₂ particle enhanced the thermal stability of TiOz particle resulting in the suppression of the phase transformation from anatase to rutile phase. The crystallite size of prepared particles decreased with decreasing W_(0) ratio. The surface area increased with decreasing W_(0) ratio. In addition, TiO₂/SiO₂ (90/10) particles shows higher photoactivity than that of pure TiO₂ particles.

골격성 III급 부정교합자에서 술 전 교정치료 전과 후의 수술계획의 차이

이은주,손우성,박수병,김성식 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.3

본 연구는 술 전 교정치료 전 치아 이동 예측치(initial STO)와 술 전 교정치료 후 실측치에 바탕을 둔 STO (finalSTO)를 비교하고자 시행되었다. 부산대학교병원 치과교정과에 내원하여 교정 및 악교정수술 복합치료를 시행 받은 환자 중 하악만 수술한 환자 40명을 선정하여 상악 제1소구치 발치 여부에 따라 두 그룹(발치 그룹 20명, 비발치그룹 20명)으로 분류하였다. 술 전 교정치료 전의 initial STO, 술 전 교정치료 후의 final STO를 작성하여 각 계측치를 수평, 수직 기준선에 대해 거리를 측정하여 비교하였다. 발치 그룹의 두 STO 비교 시 수직적으로 상악 중절치절단연과 치근단, 상악 제1대구치 협측교두에서, 수평적으로 상악 중절치 절단연, 상악 제1대구치 근심협측교두, 하악 중절치 치근단, 하악 제1대구치 근심면과 근심협측교두에서 차이를 보였으며 비발치 그룹의 경우는 수직적으로 하악 중절치 치근단, 수평적으로 상악 중절치 절단연, 하악 중절치 절단연과 치근단, 하악 제1대구치 근심면에서 차이를 보였다. 두 STO의 차이와 initial STO 수립에 영향을 미칠 수 있는 여러 진단 요소와의 상관성 평가 시 상악 치열궁 공간 부족량이 상악 전치의 수평, 수직 및 제1대구치의 수평 위치 예측에 유의한 상관성을 가졌으며 두 그룹 모두 하악 전치 치축 각도와 하악 치열궁 공간 부족량이 하악 전치의 수평 위치 예측에 유의한 상관성을 보였다. InitialSTO 작성과 술 전 교정 단계에서 이를 고려하여 진행한다면 좀 더 효율적인 치료 계획 수립 및 전체적인 치료 기간을 줄이는 것에도 도움이 될 것이라 생각한다. and final STO in Class III malocclusions and to find which factors are related to the discrepancies. Methods: Twenty patients were selected for the extraction group and 20 patients for the non-extraction group. They were diagnosed as skeletal Class III and received presurgical orthodontic treatment and mandibular set-back surgery at Pusan National University Hospital. The lateral cephalograms were analyzed for initial STO (T1s) at pretreatment and final STO (T2s) after presurgical orthodontic treatment, and specified the landmarks as coordinates of the X and Y axes. Results: Differences in hard tissue points (T1s-T2s) in the X coordinates of upper central incisor edge, upper first molar mesial end surface, lower central incisor apex, lower first molar mesial end surface and mesio-buccal cusp and Y coordinates of upper central incisor edge, upper central incisor apex, upper first molar mesio-buccal cusp were statistically significant in the extraction group. Differences in hard tissue points (T1s-T2s) in the X coordinates of upper central incisor edge, lower central incisor apex, lower first molar mesial end surface and Y coordinates of lower central incisor apex were statistically significant in the non-extraction group. In the extraction group, the upper arch length discrepancy (UALD) had a statistically significant effect on maxillary incisor and first molar estimation. Lower arch length discrepancy and IMPA had statistically significant effects on mandibular incisor estimation in both groups. Conclusions: Discrepancies between initial STO and final STO and factors contributing to the accuracy of initial STO must be considered in treatment planning of Class III surgical patients to increase the accuracy of prediction.

演習林 木本植物 調査에 관한 硏究

李命器,全哲,吳正壽,金成柱 圓光大學校大學院 1987 論文集 Vol.1 No.-

1. The tree grown in the university forest consisted of 54 families, 69 genera, 167 species, 15 varieties, 2 forma, so that the totaling were 185 taxa. 2. At a height of 500 meters over, the forest mostly consisted of Quercus variabilis forest. 3. We need to collect cork from Quercus variabilis growned massively and have enlarged artificial reproduction than now. 4. Cryptomeria japonica forest area that artificially reproducted at 11 block is a model managed forest. 5. According to the results, because the species defined the temperate zone, it is not suitable for the practice of students. Therefore, we need the positive act of university so that the forest species obtain the other forest zone.

지지막을 이용하는 액막 추출기 내에서 아연 이온의 이동

주창식,이석희,이민규,홍성수,하홍두,정석기 한국환경과학회 2000 한국환경과학회지 Vol.9 No.2

For the purpose of development of a liquid membrane permeator which separates metal ions from aqueous solutions continuously and effectively, a continuous membrane permeator with the membrane solution trapped between extraction and stripping phases by two micro-porous hydrophilic films was manufactured. Experimental researches on the separation of zinc ion from aqueous solutions were performed in the liquid membrane permeator with 30 vol % D_2EHPA solution in kerosine as liquid membrane. As results, the liquid membrane permeator separates zinc ion from aqueous solutions continuously and effectively in the wide range of operating conditions. A simple mass transfer rate model using equilibrium constant of the extraction reaction for the system used were proposed, and the model was compared with experimental results of separation of zinc ion in the permeator. And the effects of operating factors, such as space time, pH of extraction solution, extraction temperature, on the separation rate of zinc ion in the permeator were experimentally examined.

프로구단 웹사이트를 통한 6C 전략 구축방안 연구

이사겸,이성주,유한종 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.6

This study aims to provide better service to customers and to work out marketing strategies for making 6C(contents, communication, commerce, community, connection, customization), through comparing and analyzing official web site of the domestic professional sports teams. The web sites should develop various good quality of information and to increase the user's satisfaction. The web sites of satisfaction to increase your teams loyalty. The loyalty is very important things for business and operating teams. And then, the develop of web sites for user. However tired you may be, you must it. Sometimes user conflicted of the web site which not enough contents, commerce so on. There are mistaken. Not that sports teams disliked the operated web sites, but that sports teams no cognition for web site. This study to meet the purpose, was made through investigated of books and official web sites. The objective of this research is for you to click the internet order site 'www.rankey.com' for high position the sports web sites. And more, using the other article. As a result, the web sites of the sports teams have a lack of contents and commerce, community, however, construction of shopping mall with low cost and new technological development. Firstly, users very important to communication in quickly response to BBS, Q&A. And then, user to solved of his question and trouble, conflict. Secondly, the web sites develop the contents for user and customers of enjoy. Thirdly, the web sites include of community for customization and communication with marketing targets. Fourthly, in this study, the satisfaction of sports web sites develop on game informations for users. The user wanted to information of player news and game news for enjoyed himself. So many people wanted to different of other web sites and contents. Finally suggestion, connection of the other web sites for sports teams have a lack contents and information.

치주조직 재생을 위한 칼슘 포스페이트 글라스 분말이 백서 두개골 결손부의 골조직 재생에 미치는 영향

이용근,문현주,이상배,김광만,김경남,최성호 大韓齒科器材學會 2003 대한치과재료학회지 Vol.30 No.2

The treatment of the tone defects resulting from trauma, neoplasm, surgery, or infection is one of the major concern in dentistry. The major goal is the functional, esthetical regeneration of supporting structures already destructed by disease. Transplantation technique have been used to provide a scaffold for bone regeneration, to augment bony defects resulting from trauma or surgery, to restore bone loss caused by dental disease, to prevent the collapse the alveolar ridge in recent extraction sites, to replace bone loss by periodontal disease, to augment the alveolar ridge in implant surgery. There are autogeneous, allogenic, xenogenic and alloplastic bone-grafts in transplantation. Among the alloplastic bone-graft materials, calcium phosphates have been received the most attention. In this study, the critical size defects were surgically produced in the calvarial bone of Sprague-Dawley rats using the 8 ㎜ trephine bur. Calcium phosphate glass powders with mean diameter 400 ㎛ transplanted onto the produced detects in the experimental group, while sutured without grafting anything in the control group. Histomorphometric as well as radiodensitometric analyses were performed after sacrifice at 2, 4 and 8 weeks following operation. The prepared calcium phosphate glass powder with average size 400 ㎛ in CaO-CaF_2-P_2O_5-MgO-Al_2O_3 promoted new bone formation in the calvarial defects in the Sprague-Dawley rats. New bone was formed in the upper side of the detects as well as the defect margin and dura mater. Experimental group always exhibited higher values in the length, area and density of the newly formed bone than that of the control group. There were significant differences between the experimental and the control groups, except the density after 4 weeks (p<0.05).

하악골 골절에 대한 임상통계학적 연구

이성훈,김기영,조규승,소광섭,박홍주,조요기,오희균,유선열 大韓顎顔面成形再建外科學會 1998 Maxillofacial Plastic Reconstructive Surgery Vol.20 No.1

중합효소연쇄반응을 이용한 도말양성 폐결핵 환자에서의 결핵균 DNA 검출방법에 관한 연구

이종진,김애경,조해정,한표성,홍석철,김주옥,김선영 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.2

Polymerase chain reaction (PCR) is the most sensitive and rapid method for the diagnosis of M.tuberculosis infection. Many reports have shown different methods for mycobacterial DNA extraction, but revealed many differences in simplicity and time-consumption. We studied which method was the best among 7 different ones for DNA extraction from 32 smear-positive sputa, using PCR of targeting 123bp DNA fragment of IS6110. The methods were the following : SDS-Microwave oven method, NaOH Lysis method, Triton X-100, Proteinase K method, Lysis buffer method. SDS-Proteinase K method, Bead Beater method, and Bead Beater/CTAB method. The amplification products were identified by electrophoresis on ethidium bromide-stained agarose gels, and confirmed by restriction enzyme, Southern blot hybridization, and DNA sequencing. All 32 cases were positive (100%) by the 7 different methods. It took 1 hour or more to detect DNA in SDS-Microwave oven method, NaOH Lysis method, and Bead beater/CTAB method. It took 2 hours or less in the others. SDS-Proteinase K method and Bead Beater/CTAB method were simpler and more convinient than the others. These results suggest that SDS-Proteinase K method and Bead Beater/CTAB method might be better than the others for the extraction of mycobacterial DNA in terms of simplicity and time-consumption, although all the methods were sensitive.