• 대한치과의사협회지
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• 제57권9호
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• pp.496-503
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• 2019

A dental implant has been covered by National Health Insurance (NHI) in Korea since 2014. Every year the age group covered was extended and the out-of-pocket payment was decreased. This study analyzed the dental implant utilization rate by the National Health Insurance customized DB during the last 5 years. As a result, the utilization rate has been rapidly increasing steeply. The differences by age and sex in the utilization rate of dental implants were explored. The inclusion of a dental implant in the NHI system contributed to improving the dental accessibility of the elderly in Korea. However, a deep discussion is needed whether it is appropriately provided to necessary patients. The utilization rate will increase further in the future. Therefore, continuous monitoring and critical policy review should be continued.

• 대한치과기공학회지
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• 제27권1호
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• pp.41-55
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• 2005

This study is to investigate the increasing membership rate against the previous year among the members registered as representative members and general members of the Korea Dental Technician Association from 1990 to 2004. With this study, we aim to provide more systematic data about the current status of each members in the KDTA and reconsider the needs for the practical and distinguishing management of the members. Results of the study are as follows; 1. The increasing rate from 1990 to 2004: whole members; 2.14, representative members; 2.22, general members; 2.11. Average of increasing rate against the previous year: general members; 6.10%, whole members; 5.94%, representative members; 5.91%. 2. The increasing rate in the city branch from 1990 to 2004: whole members; 2.12, representative members; 2.03, general members; 2.15. Average of increasing rate against the previous year: general members; 6.63%, whole members; 6.05%, representative members; 5.23%. 3. The increasing rate in the province branch from 1990 to 2004: whole members; 2.21, representative members; 2.74, general members; 2.01. Average of increasing rate against the previous year: representative members; 7.58%, whole members; 5.99%, whole members; 5.35%. 4. Mean ratio between representative members and general members from 1990 to 2004: 1:2.6 against the whole members, 1:2.8 in the city branch, 1:2.3 in the province branch. The ratio between representative members and general members in the year 2004: 1:3.1 in Kyoungnam province, 1:3.0 in Inchon, 1:2.9 in Kwangju that indicates a high ratio between two members and in the case of Chongbuk, the ratio between two members is rather low as shown in 1:1.1.

• 기술사
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• 제15권3호
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• pp.12-18
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• 1982

단추형 제 2신화은전지의 고주파형 방전용량의 변화를 음극의 구조, 합제배합, 음극 소제의 모양, 격리막, 전해액농도와 연결지어 조사하였다.

• 보험의학회지
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• 제1권1호
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• pp.133-139
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• 1984

In the 2,218 healthy cases-male 1,574 female 644-who were conducted serum examination from May 1st 1983 to November 1st 1983 by the medical selection of Dae Han Kyouk life insurance Co., the results which investigated the HBsAg by using the Reverse Passive Hemagglutination(RPHA) method are as follows; 1. The number of 167 from 2,218 cases proved to be positive, showing 7.52%, the number of 143 from 1,574 male positive, showing 9.08%, and the number 24 from 644 female positive, showing 3.73%. The positive rate of the male was indicated by 5.36% higher than that of the female as the former marked 2.4 times higher distribution than the latter. 2) The positive rate by the type of occupations appears as follows; The highest positive rate group is that of discharger from military service in 1983, the number of 70 from 736 persons marking 9.51% and the next is the merchant 8.79%(8/91), employee of a company markes 8.53%(44/516), high school boy 7.69%(19/247), house wife 5.71%(10/210), carrier woman 3.45%(10/290) and the group of the high school girl records the minimum rate of all, 3.13%(4/128). 3. The positive rate by the age group appears as follows; The highest rate group is that of 31 to 35 years, marking 9.80% positive rate, and the next is $26{\sim}30$(9.3%), $21{\sim}25$(8.01%), $41{\sim}45$(6.96%), $36{\sim}40$(6.9%), those below 20(5.99%), 46 to 50 years shows the minimum rate of all(2.94%) Among the male case, 26 to 30 years shows the highest positive rate by 10.59% and female, 31 to 35 years shows the highest rate by 7.89%. 4. The positive rate by the blood type represents as follows; Blood type A shows 7.30%, type B 7.17%, type O 6.11% and type AB indicates 5.88% in order.

• 유기물자원화
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• 제18권4호
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• pp.45-53
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• 2010

여러 가지 방법으로 전처리된 느타리 버섯 폐배지에 대한 줄지렁이 개체군의 섭식률 및 생장률을 조사하였다. 갓 발생한 버섯폐배지의 부숙기간을 달리하여 지렁이에게 급이하였을 경우, 20일 이상 부숙된 버섯 폐배지보다 10일 이하로 부숙된 버섯 폐배지에 대한 지렁이 개체군의 섭식량 및 생장률이 높았다. 분변토를 첨가한 버섯폐배지나 질소영양원으로서 요소비료를 첨가하여 부숙한 버섯폐배지는 지렁이 개체군의 섭식률과 생장률을 증대시키지 못하는 것으로 나타났다. 그러나 버섯폐배지를 분쇄하여 공급하였을 경우에는 섭식량 및 생장률이 증가하였다. 특히 분쇄된 버섯폐배지에 미강을 첨가하였을 경우에는 분쇄하지 않은 단순 버섯폐배지보다 생장률이 1.85배 증가하였다.

• 한국수자원학회논문집
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• 제32권3호
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• pp.301-310
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• 1999

본 연구에서는 하천-대수층 계에서 수치모형과 두 종류의 해석모형을 적용하여 유도침투량 곡선을 유도하여 비교하였으며, 투수계수의 이방성비 및 지하수 유입 방향이 유도침투량 산정에 미치는 영향을 평가하였다. 유도침투량 곡선은 단순한 그래프 형태로 표시되며, 유도침투량, 양수량, 하천과 우물사이의 거리, 유동 지하수 유입량 등의 4가지 인자만을 포함하기 때문에 유도침투량의 결정에 유용하게 적용될 수 있다. 검토된 조건 아래에서 Wilson 해석모형과 FEWA 수치모형의 유도침투량 곡선은 근사적으로 일치하였으며, 투수게수의 이방성비는 유도침투량에 큰 영향을 미치는 인자로 평가되었다. 본 연구에서 적용된 방법과 도출된 결과들은 유도침투 현상을 이해하는데 도움이 되며, 양수우물의 계획 및 설계, 용수공급 우물의 수질관리에 필요한 유도침투량과 양수량의 최적 결정에 적용될 수 있다.

• 한국주거학회논문집
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• 제18권3호
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• pp.63-72
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• 2007

The purpose of this study is to identify the impact of the building, site, and region characteristic factors on the annual average price rising rate of apartment housing in Seoul. The data were consisted of 272 apartment units in Seoul. A survey included checking the drawing documents and interview with apartment maintenance staffs and real estate agencies from October 2006 to February 2007. Data were analyzed with descriptives, frequency, crosstabs, and linear regression by SPSS/PC for Window. The linear regression model was employed to evaluate the price rising rate in apartment housing. Following results were obtained. The price rising rate for pyeong ($3.3m^2$) of apartment housing was determinated by the district zone, the construction company's brand name, the building age, the building stories, the floor space index, the building-to-land ratio, the green space rate, and the distance from the downtown. Especially, the district zone was the most important factor that affected the price rising of apartment housing in Seoul. Therefore, the policy has to focus to solve the imbalance between autonomous districts with the collaborated tax.

• 한국주거학회논문집
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• 제13권2호
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• pp.73-78
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• 2002

Recently, the energy consumption has been sharply increased and the environmental pollution has been serious, resulted in increased use of fossil fuel. These facts are applied to most fields, and are especially important issues in the field of architecture. The energy consumption rate of building is about 30% of all energy consumption, and the rate of residential is about 20% of the rate of building and is increasing gradually. The purpose of this article is firstly to analyse an actual energy consumption rate of model building and compare it with alternative methods, which are applied passive system to, and secondly to suggest an optimal passive method for saving energy. The conclusion of this study is as follows; 1) As compared with the existing house on actual energy consumption rate, 6% in changing orientation to a south, 9% in using double low-e glazing and 23% in shading is decreased. 2) The change of insulation from 50 to 100mm did not show dramatical difference in energy consumption rate. 3) As changed indoor temperature at 2$0^{\circ}C$ in winter and 27$^{\circ}C$ in summer, the rate shows a reduction of 14% compared with the existing condition.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회 논문집
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• pp.1302-1306
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• 2005

This study has Performed to develop rehabilitation model for determination of optimal rehabilitation time on the Cast Iron Pipes (CIP) with diameter less than 300 mm in water pipeline network and to analysis the sensitivity on the rehabilitation times of developed model. In the result from the application of the field, the renovation time was faster about 10 years than the replacement time. Especially, as the difference between rehabilitation and replacement time on E-CIP was about from 3 to 5 years, and it was thought that the replacement was effective on E-CIP. To sensitivity analysis, the discount rate of coefficient was fixed at 0.08, and the values of initial year break rate(N($t_o$) and growth rate coefficient(A) were adjusted in values of 0.0009, 0.0018, 0.0027, and 0.05, 0.10, 0.15 respectively. When the values of N($t_o$) and A was increased, the results from the time of rehabilitation and replacement was faster It was thought that N($t_o$), 0.018 was reliable values on the applied pipeline through the result of the study. In case of A, the values of A above 0.1 was thought to be Proper.

• 대한영양사협회학술지
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• 제6권2호
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• pp.79-85
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• 2000

This study was undertaken to investigate the physicochemical characteristics and intake rate of Kimchi provide to five foodservice elementary schools in Sungnam area selecting 4th and 6th grade students pH indicated 4.73-5.29 at before-serving state. Total acidity were 0.23-0.44% and salinity just before-serving state were 2.41-2.82%. Vitamin C were 6.88-8.12mg% and Total dietary fiber showed the range of 19.18-22.60. While the intake rate of kimchi of female students was higher than that of male students for 4th grade students, the intake rate of kimchi of male students was higher than that of female students for 6th grade students. As a whole, the intake rate of male students was higher than that of female students. The intake rate of male students correlated significantly that of female students, the preference rate of kimchi was almost the same regardless of sex distinction.