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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.
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.
담음(痰飮)에 대(對)한 문헌적(文獻的) 고찰(考察) -호흡기(呼吸器) 질환(疾患)을 중심(中心)으로-
이주희,오태환,정승기,이형구,Lee, Ju-Hee,Oh, Tae-Hwan,Jung, Sung-Gi,Rhee, Hyung-Koo 대한한방내과학회 1992 大韓韓方內科學會誌 Vol.13 No.1
This study has been carried out to investigate the cause and symptom treatment of Dam-Hum (痰飮) by referring to 41 literatures. The results were as follows; 1. The factors causing Dam-Eum (痰飮) divided into 3 groups. The 1st outer factors are six dirty (六淫), 2nd week and yanghu (陽虛), 3rd mental. 2. The symptom of Dam-Eum (痰飮) is as follows. (1) dam(痰) : cough, retching, pain of sub-ribs, vomiting, crazy, coma, dizziness. (2) eum(飮) : edema, stimulus feeling in throat, cough with pain, cough, hemoptysis indigestion. 3. The treatment of Dam-Eum (痰飮) is as follows. gudam(祛痰), sungi(順氣), bobipaesin(補脾肺腎), chungyul(淸熱), jesep(除濕). 4. The drugs of Dam-Eum (痰飮) is as follows. gudam (祛痰): ejintang (二陳湯), dodamtang (導痰湯), gunghatang (芎夏湯). sungi (順氣) : chilgitang (七氣湯), gamisachiltang (加味四七湯). babi (補脾) : gwibitang (歸脾湯), sagunjatang (四君子湯). bopae (補肺) : bapaetang (補肺湯), yunpaeeum (潤肺湯), saeumjun (四飮煎). bosin (補腎) : yukmihwan (六味丸), palmihwan (八味丸), singihwan (腎氣丸).
이주희,권영진,김동은,Lee, J.H.,Kwon, Y.J.,Kim, D.E. Korean Tunnelling and Underground Space Associatio 2014 한국터널지하공간학회논문집 Vol.16 No.1
터널내의 연기거동 및 대피안전성을 평가하기 위하여 수치해석을 수행하였다. 본 연구의 목적은 최근 더욱 길어지고 있는 장대터널의 화재로 인한 연기 및 온도 분포와 안전성을 평가할 수 있는 수치적 방법을 구현하는데 있다. 계산에 사용되는 컴퓨터자원을 최소화하기 위하여 모델로 선정한 터널의 전체길이인 3 km을 사용하는 대신 여러 개의 대피터널이 포함되는 1.5 km만을 해석영역으로 사용하였다. 터널내의 연기거동에 의한 대피자의 안전성을 평가하기 위하여 연기의 밀도에 의한 기시도와 바닥으로부터의 높이를 고려한 SE (smoke environment)값을 사용하였다. 공기 중에 포함된 연기의 밀도는 3차원 전산유체역학을 통하여 구하였다. 이러한 연기 거동에 영향을 미치는 온도분포를 정확하게 모사하기 위하여 터널 벽면을 단열 혹은 일정한 열유속(heat flux) 가정을 사용하는 대신 1차원 열전도(heat conduction)방정식을 이용하여 터널벽면의 온도를 계산하였다. 대피터널간의 거리가 가까울수록 대피자의 안전성은 높아지겠지만 상대적으로 건설비용이 증가하게 된다. 본 연구에서 대피터널의 길이는 250 m로 하였으며 화재 시 제연팬의 운전 조건을 3가지 (팬이 가동되지 않는 조건, 임계풍속이하조건, 임계풍속이상조건)로 나누어 연기의 거동과 온도분포를 고찰하였다. 그리고 화재가 발생한 시간부터 플래쉬오버가 발생한 시간까지의 연기의 거동과 대피자의 상황을 SE를 이용하여 고찰하였다. A numerical analysis on the smoke behavior and evacuee safety has been performed with computational fluid dynamics. The purpose of this study is to build computational processes for an evacuation and prevention of a fire disaster of a 3 km-length tunnel in Korea. To save computational cost, 1.5 km of the tunnel that can include a few cross-passing tunnels is considered. We are going to assess the fire safety in a road tunnel according to the smoke level, which consists of the smoke density and the height from the floor. The smoke density is obtained in detail from three-dimensional unsteady CFD analysis. To obtain proper temperature distributions on the tunnel wall, one-dimensional conduction equation is considered instead of an adiabatic wall boundary or a constant heat flux. The tunnel considered in this study equips the cross passing tunnels for evacuees every 250 m. The distance is critical in both safety and economy. The more cross passing tunnels, the more safe but the more expensive. Three different jet fan operations can be considered in this study; under- and over-critical velocities for normal traffic condition and 0-velocoty operation for the traffic congestion. The SE (smoke environment) level maps show a smoke environment and an evacuating behavior every moment.
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.
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.
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.
동의보감(東醫寶鑑) 허노문(虛勞門) 처방(處方)의 방제(方劑) 분석(分析)에 대한 고찰(考察)
이주희,윤현자,윤용갑,Lee, Ju-Hee,Yun, Hen-Ja,Yun, Young-Gab 대한한의학방제학회 2012 大韓韓醫學方劑學會誌 Vol.20 No.1
Objectives : As the understand about historical consumptive part through studying prescriptions in DonguiBogam, we would like to study some modern geriatric and chronic diseases. Methods : We analyzed application frequency of basic prescriptions, symptoms of prescriptions and the pathology analysis against historical comsumptive in DonguiBogam. Results : Through investigation into application frequency of basic prescriptions, symptoms of prescriptions, and two way analysis of Qi blood(yin yang) pathologies and viscera and bowels pathologies, we were able to found mostly used basic prescription, common symptoms, and separate some characteristics pathologies. Conclusions : We expected that this study will can help to give rationale for future study of consumptive caring.