서울시 都市公園의 變遷에 關한 硏究

박인재,이재근 한국정원학회 2002 한국전통조경학회지 Vol.20 No.4

This study is to classify and evaluate the changes of policies, sizes, and the administrative organizations of parks in Seoul. Reviewed with the changes examined up to now, most plans were temporary ones established on situations. So it would be better to make mid-term plans based on long-term plans. For the present conditions of parks, it appeared that city parks should be managed not by entrusting autonomous districts but by Seoul local government having park administative offices by 5-green land areas, and that citizens should be allowed to develop and operate management programs for parks. For its organization, officials in the bureau consisting of specialized experts should be appointed as the directors for the concerned special duties. And the field of park, leisure, ecology and sightseeing, etc. scattered in Seoul City organizations are to be emerged onto a scholastic category. For and it is recommend to connect organizations and scientific research.

급성 심근경색후 생존심근 진단에서 Dobutamine 심초음파도와 Thallium 심근스캔의 정확성 비교

이근,강덕현,송재관,이철환,최기준,홍명기,김재중,박성욱,박종훈,박승정 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.2

좌전하행지 관동맥 개구부위의 망사형의 관(Slotted Tube)스텐트와 나선형 코일(Coil)스텐트 삽입후 단기 및 장기 암상 경과의 비교

박훈기,박성욱,이일수,이상곤,김진우,이근,정상식,이철환,홍명기,김재중,박승정 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.6

일부 부인과 양성 질환자의 지방조직 및 혈청의 PCBs와 DDE 농도

박성균,이강숙,노영만,구정완,민선영,한진구,고원경,김미란,정재근,이종승,김진홍 大韓産業醫學會 2000 대한직업환경의학회지 Vol.12 No.1

목적 : 본 연구는 지방조직과 혈청의 PCBs와 DDE 농도를 측정하고, 이에 영향을 미치는 것으로 알려진 요인들과의 관련성을 평가하고자 하였다. 방법 : 유방암, 자궁내막증 등 유기염소계 화합물의 영향이 있는 것으로 알려진 호르몬 관련 질병을 제외한 부인과 환자 52명을 대상으로 지방조직과 혈청을 분석하였으며, 설문조사를 통하여 연령, 교육수준, 직업, 비만도, 흡연과 음주, 출산력, 수유력등을 조사하였다. 지방조직과 혈청의 PCBs와 DDE 농도는 가스크로마토그래피를 사용하여 측정하였다. 결과 : 지방조직의 경우, 13개 PCBs congeners 농도의 합은 중앙값이 48.29 ng/g, 기하평균값이 56.78 ng/g이었고, DDE 농도는 중앙값이 142.89ng/g, 기하평균값이 117.06 ng/g이었으며, 혈청의 경우는 PCBs congeners 농도의 합은 중앙값이 4.67 ㎍/L, 기하평균값이 4.85 ㎍/L이었고, DDE 농도는 중앙값이 1.75 ㎍/L, 기하평균값이 2.09 ㎍/L로 나타났다. 지방조직과 혈청의 DDE 농도 사이는 높은 상관성을 보였으나(r²=0.310, p=0,0002), PCBs는 상관성이 약한 것으로 나타났다(r²=0.029, p=0.2582). 영향요인을 범주화한 후 로그변환 시킨 지방조직과 혈청의 PCBs, DDE 평균의 차이를 분석한 결과, 지방조직의 DDE만이 출산자녀수(p=0.015), 초산연령 (p=0.014), 비만지수(p=0.035)와 연관성이 발견되었다 다중회귀분석의 결과 지방조직의 DDE는 출산자녀수가 적을수록, 초산연령이 늦을수록 증가하는 경향을 보였다. 결론 : 출산자녀수와 초산연령, 비만도가 지방조직의 DDE와 관련성을 보였으며, 또한 유기염소계 화합물의 장기간의 노출에 의한 영향을 평가하는데 있어서 혈청보다 지방조직이 더 유용한 생물지표임을 알 수 있었다. Objectives : This study was purposed to determine the levels of PCBs and DDE in adipose tissue and serum and to evaluate the relations with factors affecting these levels. Methods : We analyzed adipose tissues and sera from 52 gynecologic benign disease patients aged 27-78 years, except hormonal diseases such as breast cancer and endometriosis. We also surveyed age, education, occupation, body mass index (BMI), smoking, drinking, number of children, and duration of breastfeeding by questionnaires. Tissue and serum levels of PCBs and DDE were measured using gas chromatography. Results : The median and geometric mean levels of PCBs were 48.29 ng/g, 56.78 ng/g for adipose tissue and 4.67 ㎍/L, 4.85 ㎍/L for serum, and those of DDE were 142.89 ng/g, 117.06 ng/g for adipose tissue and 1.75 ㎍/L, 2.09 ㎍/L for serum, respectively. Adipose tissue and serum levels for DDE showed high correlation (r²=0.310, p=0.0002), but those of PCBs didn't (r²=0.029, p=0.2582). In analyses of the differences of the means of log transformed adipose tissue and serum PCBs and DDE levels for groups of potential covariates, only adipose tissue DDE levels were significantly associated with number of children (p=0.015), age at first birth (p=0.074) and BMI (p=0.035). In multiple regression analysis, adipose tissue DDE levels were significantly increased with decreasing number of children and increasing age at first birth. Conclusions : This study suggested that parity and adiposity were associated with levels of DDE in adipose tissue, and adipose tissue is a better biomarker than serum for evaluating the long-term exposure of organochlorines.

효율적인 통합 업무를 위한 정보관리 시스템 구축

박두순,안종근,공용해,정재헌 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-

기업의 효율적인 정보시스템 구축은 정보화 사회에서는 반드시 필요하다.또한 기업의 성장 규모, 기업의 요구 사항, 기업의 보다 향상된 업무를 위해 시스템을 능동적으로 구현, 확장, 재구성되어야 한다.이에 정보의 연계, 최신 정보의 효율적 관리를 이용한 구체화와 정보화를 유지할 수 있다.이를 위하여 중소 업체에서는 한 번에 많은 투자를 해야되는 종합 정보화 시스템보다는 생산 관리, 인사 관리, 회계 관리 등 각각에 대한 정보화를 위해 가장 기본적인 프로그램들을 업체의 특성과 차별성을 고려하여 실용 업무에 보다 적합한 자동화 시스템구성의 필요성이 강조된다.따라서 이들 시스템간에 서로 정보를 교환하고, 의사결정을 하는 종합 관리 시스템을 구축하여야 하는데, 이를 위하여 기존에 개발된 영업관리, 생산 관리, 인사 관리, 회계관리 프로그램들을 통합하는 것이 새로운 시스템을 개발하는 것보다 경제적, 기능적 측면에서 매우 유리하다 할 것이다. 본 연구에서는 (주)두양금속의 기존에 사용중인 영업관리, 생산 관리, 인사 관리, 회계 관리 시스템을 통합하고자 이미 구축된 시스템을 분석하고 각각의 독립된 업무를 연계하여 효율적인 정보 관리 시스템을 구축하는 것에 목적을 두고있다.

노안수술후 각막형태검사 변화

박근성,고길환,김용선,이재림,민병무,최시환 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2

We prospectively analyzed the corneal topography of 26 eyes in 26 patients who had undergone scleral expansion for correcting presbyopia. We examined 26 eyes of 26 patients which were devided into 2 groups (mean age: 51 years, range 40-60 years) according to type of scleral expansion band, with computerized corneal topographic analysis system. Preoperatively and 5 times postoperatively (1day, 1week, 2weeks, 1month, 2months), quantitative descriptors of corneal topograpgy such as Sim K (simulated keratometry value), SRI(surface regularity index), and SAI(surface asymmetry index) were measured at each visit. The mean follow-up period was 43 days. Sim K of the operative eyes ranged from 0 to 2.5 (mean, 0.93) before operation, and mean 2.24 at postoperative 1 day in group Ⅰ. In group Ⅱ, Sim K was mean 2.20 at postoperative 1 day and decreased thereafter. SRI was from 0.54 to 1.39 and SAI was from 0.09 to 0.45 before operation. After operation, mean SAI was maximum at postoperative 2 week and mean SRI was maximum at postoperative 1 day and decreased thereafter. After two months, it became minimum. This study demonstrates that quantitative topographic change after scleral expansion for correcting presbyopia were great during first 1 week after surgery but this change diminished thereafter. Further long studies are in progress to evaluate the long term effects of this procedure.

하악골 전돌증 환자에서 양악 수술과 하악 단독 수술의 술 후 안정성에 관한 연구 : Jaw Surgery And Single Mandibular Surgery in Mandibular Prognathism

박재완,이동근 원광대학교 치의학연구소 2002 圓光齒醫學 Vol.11 No.3

Le-Fort Ⅰ Osteotomy is considered by many surgeons to be a safe and predictable method for correcting various dentofacial deformities. However, there are controversial options concerning the stability of two-jaw surgery (Le-Fort Ⅰ osteotomy and sagittal split ramus osteotomy) compared to single mandibular surgery (sagittal split ramus osteotomy). The purpose of this study was to evaluate the post-operative stability of mandible in two-jaw surgery and single mandibular surgery, to help the establishment of accurate treatment planning in patients with a skeletal class Ⅲ malocclusion. There were 15 patients who had been undergone two-jaw surgery and 20 patients who had been undergone single mandibular surgery. Lateral cephalograms of these 2groups ; Preoperation and immediate postoperation, postoperatively 1month, postoperatively 3months, at the latest follow up(>6months) ; were analyzed by linear measurement to evaluate changes in position (hard tissue B, Pogonion point) and compare relapse both group. The results obtained were as follows ; In view of B-point, the horizontal relapse rate of single mandibular surgery was 10.17% at post-op 1months, 12.52% at post-op 3months, 13.01% at post-op 6months and two-jaw surgery was 10.23% at post-op 1month, 11.84% at post-op 3months, 12.97% at post-op 6months. the horizontal relapse rates of Pogonion point were 10.78 at post-op 1month, 12.21% at post-op 3months, 12.98% at post-op 6months in single mandibular surgery and those were 10.27% at post-op 1month, 11.33% at post-op 3months, 12.01% at post-op 6months in two-jaw surgery. In terms of vertical relapse rate, rates of B point were 22.96% at post-op 1month, 28.30% at post-op 3months, 29.56% at post-op 6months in single mandibular surgery and 21.14% at post-op 1month, 25.45% at post-op 3months, 28.86% at post-op 6months in two-jaw surgery. Those of Pogonion point were 26.63% at post-op 1month, 28.40% at post-op 3months, 29.29% at post-op 6months in single mandibular surgery and 20.20% at post-op 1month, 25.44 at post-op 3months, 27.68% at post-op 6months in two-jaw surgery. There were no statistical difference between single mandibular surgery and two-jaw surgery in mandibular stability.

아이리스를 사용한 이중 모드 원추 혼 안테나의 설계

박재현,최학근 단국대학교 신소재기술연구소 2000 신소재 Vol.9 No.-

본 논문에서는 오프셋 파라볼라 안테나의 일차 복사기로서 세 장의 아이리스로 구성된 이중 모드 원추 혼 안테나를 제시하고 Ku밴드 혼 안테나를 설계하였다. 설계된 안테나의 타당성을 확인하기 위하여 제작하고 복사특성을 측정하였다. 측정결과 설계 제작된 이중 모드 원추 혼 안테나는 11.85GHz에서 E면과 H면의 10dB 빔폭이 거의 일치하고 교차편과 레벨이 -30dB 이하로서 양호한 성능을 보였고, 이론치에 거의 근접한 것으로 나타났다. In this paper, the dual mode conical horn antenna with 3 irises for the primary feed of the offset parabolic antenna is proposed and the Ku-band horn antenna was designed. To verify the validity of the designed horn, the horn antenna is fabricated and he radiation characteristics is measured. It has been shown that the E-plane 10dB beamwdith of the experimental horn is nearly equal to the H-plane 10 dB beamwith, and the cross-polarization level is less than -30dB. And also, the measured results are in good agreement with the calculated results.

19세기 후반 독일사회의 사회문화에 대한 고찰

박근제 慶南大學校 人文科學硏究所 1998 人文論叢 Vol.11 No.-

<Zusamrnenfassung>Die deutsche Gesellschaft befand sich damals in einer Ubergangssituation in der zweiten Hälfte des 19. Jahrhunderts. In den funiziger Jahren schafft die wirtschaftliche Entwicklung eine völlig neue politische und soziale Situation. Die Gründe sind die Revolution von 1848, die industrielle Revolution und die Reichsgründung von 1871.Eisenbahnbau und Schwerindustrie sind zunachst die Häupttrager dieser industriellen Revolution. Außerdem rekrutieren sich billige Arbeitskräfte aus den niedergehenden Zweigen des Handworks, vor allem aber aus dem ostdeutschen Landarbeiterproletariat und strömen in die neuen Industriezentren. Und Aktiengesellschaften und Großbanken bringen das erforderliche Kapital auf.Seit den siebziger Jahren sah sich der landbesitzende Adel ökonomisch in die Defensive gedrangt. Aber der Adel stellte einen exklusiven Berufsstand dar und erfreute sich das gesellschaftlichen Ansehens als symbolischer Form der Macht, deren Lebens Denkstil des Adels ihren Einfluß auf die anderen Klassen ausubten Die Bourgeoisie, die ihren sozialen Aufstieg durch wirtschaftliche Erfolge errungen hatte, war eine machtige Gruppe. Die reichen Geldmittel. wu.rden nur zu materiellen Zwecken verwandert und das Ideele verkummerte. Der vierte Stand ist inzwischen immer starker angewachsen und hat sich nun zur größten sozialen Gruppe entwickelt. Allgemeines Klassenbewußtsein und Klassenßezogene Solidarität beginnen sich zu etablieren.Einerseits fürchten die Konservativen die Auflösung aller Grundlagen der bestehenden politischen und sozialen Ordnung. Sein Kampf gegen den Liberalismus ist zugleich ein Kämpf um die Bewahrung der alten Ordnung gegen die aufstrebende Macht des industriellen Bürgertums. Und die Konservativen kampfen gegen die Aufhebung der Standesschranken, gegen gleiches Wahlrecht und fur die Wiederherstellung der guts-und standesherrlichen, Rechte. Das deutsche konservative Kaiserreich ist nicht auf Veranderungen gerichtet, sondern auf die Bewahrungen der altpreufiischen Gesellschaftsordnung, die durch die Vorherrschaft des Junkertums gepragt ist.Andererseits beginnt sich das mit der Industrialisierung ständig wachsende Industrieproletariat schon bald in eigenständigen Organisationen zusammenzuschließen und sich auch politisch zu artikulieren. Die Sozialdemokratie zielt auf Veränderung des deutschen Nationalstaats im Sinne einer inneren Reform.Und im Kulturkampf gilt das Zentrum als Ultramontan und internationalistisch wegen seiner Verbindung zum Papsttum. Im Kulturkampf wird die Autonomie des Staates und der Politik gegen die katholisch-konfessionellen Interessen des Zentrums erbittert verteidigt. AuBerdem befurchtet Bismarck ein Zusammengehen des Katholizismus mit anderen oppositionellen Gruppen im Reich.

농지이용증진사업의 경제효과분석

박재근,임재환 충남대학교 농업과학연구소 1998 농업과학연구 Vol.25 No.2

This study is aimed at identifying the decision making criteria as B/C ratio, IRR and NPV based on the expected benefits and costs of the land utilization and promotion projects which have implemented to improve agricultural structure under WTO system. To carry out the objectives of the study, Sinseok project area located at Dangjin district, Chungnam province was selected. Sinseok project area has 306.2 ha of paddy area with 172 farm households. The project area will be operated by the 33 specialized farm households after completion of the project which will have 20 years of economic life. After completion of the project, farm size will be increased from 1.8ha to 9.3ha. Land intensity of the project area will be increased by 10%. Increase of land productivity and cost saving due to the labor saving technology as farm mechanization will be expected. According to the survey results, the annual amount of production cost savings per farm was estimated 3.884million won and increased total farm income was expected about 43.8million won per year. The total expexted project benefits was expected 174million won per year. The project costs to promote land utilization and structural change consisted of handling charges, and direct payment for land movility. The decision making criteria representing economic feasibility of the project such as B/C ratio, NPV and IRR were estimated 2.49, 483million won and 30% respectively when the cut-off rate was taken into account 10%. In conclusion, the land utilization and promotion project proppeled by the Korean Government under the agricultural land law is considered economically feasible from the view points of expected project benefits and costs. Accordingly the project have to be implemented more strongly under the G't financial support considering WTO and UR negociation which were aimed at achieving the free trade and improvement of international competitiveness of farm products.