환경조형학과의 당면과제

김창희,Kim, Chang-Hui 한국대학교육협의회 1987 大學敎育 Vol.26 No.-

주류문화 1 - 맛있는 '와인논쟁'

김창희,Kim, Chang-Hui 한국주류산업협회 2010 주류산업 Vol.30 No.2

회로팩의 온도가속 수명시험에 관한 고찰

김창희,양충렬,고재상,Kim, Chang-Hui,Yang, Chung-Ryeol,Go, Jae-Sang 한국전자통신연구원 1992 전자통신동향분석 Vol.7 No.3

통신시스팀을 구성하는 PBA수준에 대해 운용중의 고장률 추정 및 고장형태 파악을 목적으로 실시하는 가속수명시험에 대해 서술하였다. 이를 위해 통신 시스팀에서 나타나는 고장 유형 및 각 기간에서의 고장률데이터 확보방법, 가속수명시험의 종류 및 원리, 시스팀을 구성하는 PBA 수준에 대한 가속수명시험조건에 대해 서술하였다.

총의치에 있어서의 인공치아 선택

김창희,Kim, Chang-Hui 대한치과의사협회 1989 대한치과의사협회지 Vol.27 No.6

인공치아의 선택은 각 환자에 직접 관련이 있는 몇가지 물리적 요소와 생물학적 요소에 대한 지식과 이해를 요한다. 그러므로 치과의사가 생물기계학적 정보를 모으고 관련성을 찾고 평가해서 환자 개개인의 심미적 요구와 기능적 요구를 충족시킬 수 있도록 선택해 줄 유일한 사람이기 때문에 이 단계의 치료는 반드시 치과의사가 해야 한다. 인공치아의 선택은 비교적 간단하고 시간이 걸리지 않는 과정이나 여기에는 충분한 경험과 확신성의 개발이 요구된다. 이러한 지식과 정보를 토대로 하여 선택된 치아도 임시의치상에 배열될 때 까지는 예비적 선택이 되며 최종선택은 환자의 구강내에게 평가되고 관찰한 후에 결정한다.

Pager 기술동향 분석

김창희,황건,최태구,Kim, Chang-Hui,Hwang, Geon,Choe, Tae-Gu 한국전자통신연구원 1989 전자통신동향분석 Vol.4 No.4

Paging system이란 전화망 등의 전송매체를 통하여 Pager를 소지하고 있는 가입자에게 호출이나 데이터 서비스를 제공하는 것을 말한다. 국내의 경우 161.42MHz의 carrier frequency를 사용하여 전국을 8개의 지역권(1)으로 분할하여 Paging service를 제공하고 있다. 본고에서는 시스팀 차원이 아닌 단말기 차원에서 Pager의 구성부품들과 각 구성품의 기능들을 파악하였고 pager의 국내 생산 기술 현황을 조사 정리 하였다.

6시그마와 QFD를 활용한 반도체용 wire공법 최적화 연구

김창희,김광수,Kim, Chang-Hee,Kim, Kwang-Soo 한국벤처창업학회 2012 벤처창업연구 Vol.7 No.3

반도체를 제작하는데 있어 Wire bonding 공정은 가장 정밀한 관리와 핵심품질특성(CTQ)을 필요로 한다. 포장과정에 있어서 가장 필수적인 단계로 간주된다. 이 과정에서는 순금 와이어가 칩과 PCB를 연결하기 위해서 사용된다. 금의 가격은 오랜 기간 동안 꾸준히 증가하여왔고, 근래에도 더 증가할 것으로 예상된다. 이러한 상황에서, 많은 반도체 제조 회사들은 새로운 종류의 와이어를 개발했다. 합금와이어가 그 중 하나이고 그것에 많은 연구가 이루어지고 있다. 본 연구는 Wire bonding 공정에서의 parameter를 6sigma와 품질기능전개(QFD)를 사용해 최적화시키고자 한다. 6sigma 과정은 그 문제를 해결하는데 뿐만이 아니라 생산성을 향상시키는데 좋은 기법이다. 중요한 요인을 찾기 위해서 고객의 소리에 초점을 두었다. 고객의 소리의 주요 요인들은 CTQ라고 불린다. 본 연구는 CTQ의 목표수준을 설정 한 후 중요인자를 선정하기 위하여 QFD 활동을 하였으며, 최적 조건 설정하기 위해 실험계획법을 이용하였다. 따라서 본 논문에서는 품질기능전개에서 신제품 개발 시 공정 조건을 최적화 하는 과정을 제시 하여 양산에서 발생될 수 있는 품질 위험요소를 사전에 제거 시킬 수 있게 되었다. Wire bonding process in making semiconductor needs the most precise control and Critical To Quality(CTQ). Thus, it is regarded to be the most essential step in packaging process. In this process, pure gold wire is used to connect the chip and PCB(substrate or lead frame). However, the price of gold has been skyrocketing continuously for a long period of time and is expected to further increase in the near future. This phenomenon situates us in an unfavorable condition amidst the competitive environment. To avoid this situation, many semiconductor material making companies developed new types of wires: Au.Ag wire is one material followed by many others. This study is aimed to optimize the parameter in wire bonding with the use of 6sigma and QFD(Quality Function Deployment). 6sigma process is a good means to not only solve the problem, but to increase productivity. In order to find the key factor, we focused on VOB(Voice of Business) and VOC(Voice of Customer). The main factors from VOB, VOC are called CTQ. However, there were times when these main factors were far from offering us the correct answer, thus making the situation more difficult to handle. This study shows that QFD aids in deciding which of the accurate factors to undertake. Normally QFD is used in designing and developing products. 6sigma process is held more effective when it used with QFD.

치과위생사의 한국형 전문치과위생사제도 도입에 대한 견해

김창희,이선미,김형미,Kim, Chang-Hee,Lee, Sun-Mi,Kim, Hyeong-Mi 한국치위생학회 2020 한국치위생학회지 Vol.20 No.2

Objectives: The purpose of this study was to investigate the opinions of Korean dental hygienists on the Korean advanced dental hygienist system in Korea. Methods: The survey was conducted on 328 dental hygienists working at dental clinics and hospitals in Seoul, Gyeonggi-do, Incheon, and Chungcheong-do. Collected data were analyzed with the frequency analysis, independent-samples t-test, and one-way analysis of variance after their reliability and validity were verified through the reliability, exploratory factor, and confirmatory factor analyses. Results: Respondents preferred sectoral advanced dental hygienists to integrated advanced dental hygienists, but 47.0% of respondents did not respond to this questionnaire item. To become an advanced dental hygienist, 'more than 5 years but less than 8 years' of clinical experience was appropriate according to 45.7% of the respondents and 'more than 30 h but less than 40 h' of training period was appropriate according to 25.9% of the respondents. Respondents thought that the duration of the training period for advanced dental hygienists would be directly proportional to expectations from the effect of advanced dental hygienists (p=0.023). Further, respondents who were usually interested in advanced dental hygienists showed higher expectations from the role (p<0.001) and effect (p<0.001) of advanced dental hygienists than those who were not interested. Conclusions: This study suggests various implications of the introduction of the advanced dental hygienist system in Korea.

새로운 한의학 양생 범주에 관한 연구

김창희,임병묵,박해모,정명수,황귀서,신용철,고성규,장보형,이해웅,이영준,신헌태,박선주,현민경,이상재,Kim, Changhee,Lim, Byungmook,Park, Haemo,Jung, Myungsu,Hwang, Guiseo,Shin, Yongchul,Go, Sunggyu,Jang, Bohyung,Lee, Haewoong,Lee, Youngjun,Shin, 대한예방한의학회 2015 대한예방한의학회지 Vol.19 No.1

Objective : This study aimed to develop a new category system of Yanseng(養生) for traditional Korean Medicine in order to prepare the ground for organizing the resources of Yangseng systematically. Method : We reviewed the existing medical books containing Yangseng contents. Based on the experts' consensus, we drew the new category system of Yangseng in consideration of a national trait of Korea and use of Yanseng in modern society. Results : First, We devided Yangseng category into two parts: methods and applications. Methods are divided into 5 parts: mind, diet, herb, Doinangyo(導引按蹻), life. A broad use of herbs in daily life is a national trait of Korea. Doinangyo contains relaxation methods like breathing, massages and exercises like Qigong and is also very popular way to maintain health in modern western society. Applications are divided into 6 parts: type of constitution, life cycle, seasons, type of symptoms and signs, type of Mibyung(未病) and diseases. We drew this 6 parts in consideration of use in the field of health care. Conclusion : The new category system of yangseng is based on existing theories and reflects Korean national trait and use of Yanseng in modern society. We hope this new category system play a role of foundation for organizing the resources of Yangseng systematically.

코질환과 수면무호흡증

김창희,이재서,Kim, Chang-Hee,Rhee, Chae-Seo 대한수면의학회 2004 수면·정신생리 Vol.11 No.1

Nasal congestion is one of the most common symptoms of medical complaints. Snoring is caused by vibration of the uvula and the soft palate. Nasal obstruction may contribute not only to snoring and obstructive sleep apnea (OSA) but also impair application of continuous nasal positive airway pressure (CPAP), which is the most widely employed treatment for OSA. Total or near-total nasal obstruction leads to mouth breathing and has been shown to cause increased airway resistance. However, the exact role of the nasal airway in the pathogenesis of OSA is not clear and there is no consensus about the role of nasal obstruction in snoring and sleep apnea. Some reports have failed to demonstrate any correlation between snoring and nasal obstruction. On the other hand, opposing reports suggest that nasal disease may cause sleep disorders and that snoring can be improved after nasoseptal surgery. Reduced cross-sectional area causes increased nasal resistance and predisposes the patient to inspiratory collapse of the oropharynx, hypopharynx, or both. Discrete abnormalities of the nasal airway, such as septal deformities, nasal polyps, and choanal atresia and with certain mucosal conditions such as sinusitis, allergic rhinitis and inferior turbinate hypertrophy can cause snoring or OSA. Thus, these sources of nasal obstruction should be corrected medically or surgically for the effective management of OSA and adjunctive for CPAP.

자동차 시트벨트의 진동특성 개선을 위한 구조에 관한 연구

김창희,오채은,김태우,송철우,이석순,Kim, Chang-Hee,Oh, Chea-Eun,Kim, Tea-Woo,Song, Chul-Woo,Lee, Seok-Soon 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.2

To prevent vibration of a vehicle's interior parts due to external impacts, the vehicle should be designed to reduce vibration and increase rigidity. In this paper, we conducted a vehicle test in which the vibration characteristics of a seatbelt resulting from the impact of a person closing a car door were measured and analyzed. A correlation analysis was performed using the finite analysis method. Based on this, a sensitivity analysis was performed, and an improved model was designed. We compared the natural frequencies and mode shapes of the improved and the initial models, which confirmed that the natural frequency of the improved model was more than 10 Hz higher than that of the initial model. Moreover, the response frequency of the improved model was three times higher than the input frequency applied in the vehicle test.