치과용 초음파 골수술기 설계 및 평가

이주희,오정민,홍연우,김세기,백종후,이영진,이정배,이승대,Lee, Joo-Hee,Oh, Jung-Min,Hong, Younwoo,Kim, Seiki,Paik, Jonghoo,Lee, Young-Jin,Lee, Jeong-Bae,Lee, Seung-Dae 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.12

A piezoelectric ultrasonic bone surgical instrument, usually used to remove the tartar out of teeth or to cut the dentine of the tooth, is a recently popular instrument for dental treatment due to its several merits such as small size, low-electric power and precision control of surgical operation. It has typically two parts of a tip and vibration system which is also composed of head, piezoelectric elements and tail-mass. In order to improve the performance of the instrument, it is important to standardize the size of the vibration system without tip for high performance. In this study, a Finite Element Analysis (FEA) was utilized to optimize the structure of ultrasonic instrument in vibration system. Consequently, this study revealed that influence of several tips on property were minimized and it showed good property at the frequency range of 22~32 kHz.

치과 임플란트용 골융합 측정기의 설계 및 평가

이주희,김창일,백종후,조정호,전명표,정영훈,이영진,이정배,이승대,Lee, Joo-Hee,Kim, Chang-Il,Paik, Jong-Hoo,Cho, Jeong-Ho,Chun, Myoung-Pyo,Jeong, Young-Hun,Lee, Young-Jin,Lee, Jeong-Bae,Lee, Seung-Dae 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.3

The osseointegration of dental implant is influenced by many factors such as surface geometry, loading and the amount of bone. Thus, stability of the dental implant should be checked periodically. In order to test the stability of dental implant by using resonance frequency analysis, we designed a structure of transducers and fabricated a piezoelectric devices. Using finite element analysis, the thickness and length of piezoelectric device and transducers were tailorized and the optimized frequency of 10 kHz was obtained. The resonance frequency from simulation analysis and evaluation was estimated to be similar as 10 kHz. The osseointegration was further enhanced with increasing frequency from the evaluation result of the finite element analysis.

통영지역 해녀의 식습관 및 영양소섭취 실태조사

이주희,김찬,Lee, Joo-Hee,Kim, Chan 대한지역사회영양학회 2002 대한지역사회영양학회지 Vol.7 No.6

The purpose of this study was to investigate the nutritional intake and dietary habits of women divers in Tongyoung area and to support the guideline for the improvement of their dietary life style by a validation of a Computerized Semi-quantitative Food Frequency Questionaire. Compared to the women at Jeju Island, the Tongyoung divers showed similar heights (154.6 $\pm$ 0.8 cm), weights (53.5 $\pm$ 1.0 kg) and BMIs (23.3 $\pm$0.4) , but they showed especially high levels of body fat (33.8 $\pm$ 0.8) . Their dietary habits showed they usually skipped lunch, but ate too much food at once, which may represent the dietary habits shown by obese people. Over 40% of the divers were taking some nutritious food or complementary food for health, without realizing the efficacy of these foods. The analysis of nutritional intake showed that all of average daily nutrients intakes of those below 50 years were higher than those of the Korean RDA. In the case of those above 50 years, it was shown that the average daily nutrients intakes were also higher than those of the Korean RDA except for energy (94.5%) and calcium (82.1%) . However, some individual divers showed lower nutrients intakes than 75% of RDA for calcium, iron, Vitamin A and Vitamin B$_2$. Also, excessive intakes of phosphorous and sodium could be a dietary problem. There was no correlation between BMI or percentage of body fat and energy, CHO, protein or fat. These results can provide the nutritional information for this special community, women divers, to improve their health.

역세권내 역 인접 소공원의 유형별 이용행태분석을 통한 활성화 방안 연구

이주희,박진아,Lee, Joo-Hee,Park, Jin-A. 한국조경학회 2008 韓國造景學會誌 Vol.36 No.3

2005년 3월 31 일 도시공원 및 녹지 등에 관한 법률 개정으로 도시공원 분류체계에서 소공원과 주제공원을 세분화하여 추가하였으나, 기능, 규모, 유치거리가 명확한 개념이 정립되어 있지 않은 상태이다. 특히, 조성 과정상의 확실한 설계되어 있지 않으며, 최근 법제화된 '도시공원 , 녹지의 유형별 세부기준 등에 관한 지침'(2007.2)에서도 유형을 공원의 설치위치 빛 성격에 따라 근린, 도심소공원으로 구분하였으나, 유형별 공원의 지정은 되어 있지 않은 상태이다. 본 연구에서 보고자 하는 역세권내 위치한 소공원은 설치위치 및 지역의 성격에 따라 그 특성이 다르게 나타나므로 법에서 명시하고 있는 유형에서의 설치위치 및 지역적 특징을 분석하여 궁극적으로 유형별 특성에 따른 공원의 활성화 방안을 제시한다. 유형화를 위한분석기준은 각각의 공원은 인접한 역의 성격과지역의 성격이 다르므로 첫째, 법에서 명시하고 있는 정의에서의 지역적 특성과 이용자 특성에 따른 유형분류로서 근린소공원과 도심소공원의 분류체계에 따라 공원유형분류 한다. 소공원 주변 용도배분비율과 기존의 소공원 설치 당시 공공에서의 설치목적을 각 구청의 담당자의 문의를 통하여 파악하고, 이용자의 거주특성의 경우는 이용자를 대상으로 설문을 거주지와 거주동에 대한 질의응답을 통하여 각 공원의 주 이용자의 거주특성을 파악하여 최종 대상지 근린소공원 3개소, 도심소공원 3개소를 선정하였다. 둘째, 각 유형 관찰조사를 통하여 이용자들의 이용행태특성을 파악하고, 설문조사를 행하여 유형별 대상지의 이용실태 및 이용특성의 차이점과, 어떤 측면에서 각기 다른 특성을 가지고 있는지에 대해 이용실태 및 공원시설에 대한 중요도 및 만족도, 공원 환경적 측면의 만족도에 대한 의견을 조사한다. 셋째, 관찰조사와 설문분석에 따른 결과와 관리 공무원과 공원설계자와의 인터뷰 결과를 종합하여 추후 계획시 고려하여야할 점으로 공원이용 활성화를 위한 시설 및 설계적 측면과 이용행태적 측면, 관리 및 운영적 측면에서 시사점을 도출한다. The government is planning to link a small park with the soon to be ready subway line 9 as a part of Seoul's policy, "The standard or plan for making a water-friendly space by water use" (2007). However, the specified concepts and instructions of the small parks need further work. Therefore, the policy is expected to expand to neighboring small parks near the subway station, but these are not supported by research or data which suggests the needs or actual user behavior and utilization of small parks. our country added the specified concept of small parks and theme parks to the classification of urban parks in the Urban Park Act Revision (2005.3.31), but the concept of small parks is not clearly settled in the law in the scopes of its function, scale, promotion nor particularly defined plans for small park projects. This study examines as small park near a subway station. The characteristics of there region and users vary from the characteristics of the station and region. In the "directions for concrete standards under the types of urban parks and green zones" (2007.2) the types of small parks are classified by "regional characteristics" and "user characteristics". Therefore, this study classifies the subject of neighboring small parks near subway stations as the neighborhood and small urban parks according to the Urban Park Act. The study was paralleled with observation and questionnaires on the analysis of the neighborhood and small urban parks. The actual conditions of park utilization and user behavioral characteristics were deducted by observation, while the questionnaire determined actual user utilization, importance and satisfaction level as well as the small park environment. This study largely focused on three aspects: park facility, design of this sentence isn't even complete. The second aspect isn't finished and the third isn't here.

단체 급식 종사자와 일반주부와의 영양지식·위생지식 및 실행도 차이 비교연구

이주희,신지연,김창임,Lee, Joo Hee,Shin, Ji Yeon,Kim, Changim 한국식품영양학회 2014 韓國食品營養學會誌 Vol.27 No.6

This research is aimed at evaluating the nutrition knowledge and hygiene knowledge of people who are either foodservice employees or housewives and at providing data for conducting hygiene education by comparing the differences between the two groups. Both groups scored relatively high in nutrition knowledge with housewives scoring 9.9/12 and food service employees scoring 9.6/12. However, foodservice employees scored significantly higher in hygiene knowledge and degree of practice than housewives, A correlation was found between nutrition knowledge and the degree of hygienic practice and a significant correlation between hygiene knowledge and the degree of hygienic practice. The higher the hygiene knowledge was, the higher their degree of hygienic practice was. As for food hygiene information, foodservice employees obtained the information through hygiene education and lecture meetings, but housewives got their information through mass media. To summarize, mass media, which housewives can have easy access, must have programs for housewives to help them improve food hygiene in cooking, and programs for foodservice employees on washing food.

조경설계공모의 문제점 및 요소별 중요도 분석

이주희,조세환,Lee, Joo-Hee,Cho, Se-Hwan 한국조경학회 2013 韓國造景學會誌 Vol.41 No.6

본 연구는 현재 조경 설계공모 과정에서 발생되고 있는 문제점을 AHP 기법을 활용하여 분석 및 고찰함으로써 조경설계 공모제도 개선을 위한 기초자료 제시를 목적으로 수행하였다. 본 연구 결과, 첫째, 조경설계공모 제도의 문제점을 이루고 있는 1계층 항목에서는 '당선작 선정과정'이 가장 중요한 문제점으로 나타났고, 그 뒤를 따라 '당선작 이후 설계변화', '조경설계 공모 지침', '조경설계 공모 방식' 순으로 중요도가 나타났다. 둘째, 계층 1을 구성하고 있는 하위 항목에서는 '비 조경전문가의 심사 참여'가 가장 심각한 문제로 의견이 모아졌으며, '심사위원의 전문성 결여', '심사배점방식의 문제' 항목 등 '당선작 선정과정'에 해당하는 하위 요소가 전체 12개의 요소 중 가장 높은 순위를 차지하고 있는 것으로 나타났다. 또한 조경설계공모 당선이 이루어진 후에 일어나는 '발주자의 임의 설계변경 현상'에 대한 중요도도 높게 나타남으로써 조경설계공모의 문제점에서 간과할 수 없는 사항으로 분석되었다. 본 연구는 조경설계공모상 과정에서 발생하는 문제점의 우선순위를 선정함으로써 향후 제도 개선 시 선행적으로 검토가 이루어져야 할 부분을 찾았다는 점에 의의가 있었으며, 이러한 문제점을 근거로 향후 제도개선 방안에 대한 후속연구가 있어야 할 것임이 제안되었다. This study is conducted for the purpose of analyzing and contemplating the problems with the competition in current landscape design, with the goal of improving the landscape design competition system by using the AHP technique. The result of this study, first describe the Landscape design competition system that formed the problems and show the most important problem followed by other problems shown in order of importance, which are 'design changes after winning', 'Guidelines for design competition' and 'Landscape design competition manner'. Secondly, in the low rank article make up the level one -From a total 12 elements from the low rank article corresponding in 'process of winner selection' the 'Unprofessional landscape participate the screening' collected comments for the biggest problem, 'lack of expertise in judgement', 'problems with the examination scoring system' and other articles, the corresponding in 'process of winner selection' appears at the highest ranks. It also happens that after making the choice in the landscape design competition, the importance of 'client's design change symptoms' appears high. As a result the overlooked details of the landscape design competition's problems were analyzed. This study has prioritized the problems by problems which landscape design competition institutions most frequently have. Based on this ranking, there is significance purpose to create proactive system improvements in the future. By analyzing these problems, we will be better able to develop improvements to the future system.

표면 처리법에 따른 치과용 합금과 열중합형 레진 간의 결합 강도에 관한 연구

이주희,정은민,장복숙,정동준,허성주,한동후,심준성,Lee Joo-Hee,Jung Eun-Min,Jang Bok-Sook,Chung Dong-June,Heo Seong-Joo,Han Dong-Hoo,Shim June-Sung 대한치과보철학회 2002 대한치과보철학회지 Vol.40 No.4

The purpose of this study is to compare tensile bond strength between Cr-Co alloy and three denture base resins after surface treatment. Following the manufacturer's instructions, 180 bonded specimens were made from three denture base resins (Lucitone 199. Paladent 20. POSS resin) and three surface treatment methods (sandblasting. metal primer. silicoating) 20 samples were made in each group and a half was ther-mocycled 1000 times between $5^{\circ}C$ and $55^{\circ}C$. The tensile bond strength was measured using an Instron with 5mm/min crosshead speed. Data was analyzed with one-way ANOVA, T-test and Duncan test. The results were as follows : 1. Samples with metal primer coating had significantly high tensile bond strength than the other surface treated groups (p<.05). Significantly low tensile bond strength was shown in sand blasted groups (p<.05). 2. No significant difference was observed in metal primer coating groups before and after ther-mocycling (p>.05) 3. Tensile bond strength was decreased in silicoated samples after thermocycling (p<.05). 4. Of the surface treated groups with metal primer, Lucitone 199 had the greatest bond strength and POSS resin and Paladent 20 were followed (p<.05). 5. Of the surface treated groups with silicoating, POSS resin and Lucitone 199 had greater bond strength than Paladent 20 (p<.05).

의치용 인공치아와 의치상용 레진간의 결합강도에 관한 실험적 연구

이주희,김창회,김영수,Lee, Joo-Hee,Kim, Chang-Whe,Kim, Yung-Soo 대한치과보철학회 1996 대한치과보철학회지 Vol.34 No.3

A principal advantage of a plastic tooth over a porcelain tooth should be its ability to bond to the denture base material. But plastic teeth could craze and wear easily, so more abrasion resistant plastic denture teeth have been developed. To resist abrasion, the degree of cross-linking was increased, but bonding to denture base meterial became more difficult. The purpose of this study was to evaluate the bond strength of plastic teeth and abrasion resistant teeth bonded to heat-curing, self-curing and light-curing denture base material. Denture tooth molds were chosen that had a>8mm diameter. The denture teeth was bonded to three denture base materials and then machined to the same dimensions. Three denture base materials were used as control groups. Prior to tensile testing, the specimens were thermocycled between $5^{\circ}C\;and\;55^{\circ}C$ for 1000cycles. Tensile testing was performed on an Instron Universal testing mechine. Experimental group ; plastic teeth(Justi Imperial)+heat-curing resin(Lucitone 199) plastic teeth(Justi Imperial)+light-curing resin(Triad) plastic teeth(Justi Imperial)+self-curing resin(Vertex SC) abrasion resistant teeth(IPN)+heat-curing resin(Lucitone 199) abrasion resistant teeth(IPN)+light-curing resin(Triad) abrasion resistant teeth(IPN)+self-curing resin(Vertex SC) Control group ; heat-curing resin(Lucitone 199) light-curing resin (Triad) self-curing resin(Vertex SC). The results were as follows : 1. The denture teeth bonded to heat-curing resin showed the cohesive failure and those bonded to the other resins showed adhesive failure. 2. Tensile bond strength of the plastic teeth bonded to self-curing resin was not significantly greater than bonded to light-curing resin(p>0.05). 3. Tensile bond strength of the abrasion resistant teeth bonded to self-curing resin was not significantly greater than bonded to light-curing resin(p>0.05). 4. Tensile bond strength of the plastic teeth to self-curing resin was not significantly different from that of the abrasion-resistant teeth(p>0.05). 5. Tensile bond strength of the plastic teeth to light-curing resin was significantly greater than that of the abrasion resistant teeth(p<0.01).

아파트 보조부엌의 유형별 개조특성에 관한 연구

이주희,오찬옥,양세화,Lee, Joo-Hee,Oh, Chan-Ohk,Yang, Se-Hwa 한국주거학회 2007 한국주거학회 논문집 Vol.18 No.2

The study analyzes the remodeling characteristics of the four different types of secondary kitchens in apartment house based on their floor plans. The secondary kitchens are categorized into side placement, back placement, back placement with extensions on both sides, and back placement with an extension on a single side. The twelve apartment complexes in Ulsan were selected so that they may all consist each of the four types, and answered the survey. The classified traits of secondary kitchen were examined based on the characteristics of floor plan and remodeling. Side placement and back placement with extensions on both sides mostly used glass hinged doors. Back placement and back placement with a single side extension used glass sliding doors. It was found that the majority of the floor materials consisted of both wood and tiles, except for side placements, where only tiles were used. The sizes of the back placements with both and single side extensions were the largest. The side and back placements were rarely renovated, however, back placements with both and single side extensions went through massive remodeling.

유한요소법을 이용한 고온용 초음파 유량센서의 설계 및 평가

이주희,김창일,백종후,조정호,정영훈,이영진,남산,Lee, Joo-Hee,Kim, Chang-Il,Paik, Jong-Hoo,Cho, Jeong-Ho,Jeong, Young-Hun,Lee, Young-Jin,Nahm, Sahn 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.11

An operation temperature of $Pb(Zr,Ti)O_3$ based piezoelectric ultrasonic flowmeter was generally restricted to below 200$^{\circ}C$ due to a low depoling temperature of its ceramic material. Thus, a new designed piezoelectric ultrasonic flowmeter was fabricated in order to protect from the extremely hot fluid. Its structure is optimized by a finite element method to effectively stop heat flowing along a waveguide. Various materials such as Cu, Al, SUS were examined as a multi-plate radiation shield to enhance the performance of piezoelectric ultrasonic flowmeter. The SUS was evaluated as the most effective material to enhance the performance of piezoelectric ultrasonic flowmeter. As the number of plates of the radiation shield increased, the temperature at piezoelectric transducer away from the hot fluid was constantly decreased with a ratio of 3.12$^{\circ}C$ per the plate number.