인위적 정출술과 임플란트 치료를 통한 상악 전치부 보철치료

김경규,Kim, Kyoung-Kyu 대한치과보철학회 2011 대한치과보철학회지 Vol.49 No.1

임플란트 인접치아가 심한 치아우식이나 파절 등으로 인해 치관부의 잔존 치질이 손상된 경우 인위적 맹출술을 이용한 치관연장술은 임플란트와 인접한 치조골과 치간 유두의 보존으로 심미적인 보철 치료를 가능하게 한다. 54세 남자 환자분이 상악 전치부 고정성 보철물의 탈락으로 새로운 보철 치료를 주소로 내원하셨다. 상악 우측 중절치는 경도의 치아우식만 보였고 상악 우측 견치는 치관부 치질이 대부분 소실되어 있었다. 상악 우측 측절치의 결손부는 골 이식을 동반한 임플란트 식립을 시행하였고, 상악 우측 견치는 1달간 인위적 맹출술을 통한 치관연장술을 시행하였다. 임플란트 식립 5개월 후 2차 수술을 시행하였고, 임시치아의 단계적 수정을 통한 치은 성형 후 상악 우측 중절치, 상악 우측 측절치, 상악 우측 견치 각각 금속-도재관으로 수복하여 만족할 만한 임상결과를 얻을 수 있었다. When a tooth adjacent to implant has coronal damages caused by severe dental caries or fracture, the clinical crown lengthening by forced eruption makes it possible to get esthetic restoration due to the prevention of alveolar crestal bone resorption and loss of interdental papilla. A 54-years-old male patient wanted prosthetic treatment because his anterior 3 unit bridges had fallen out. A right maxillary central incisor showed mild dental caries but a right maxillary canine lost most clinical crowns. Forced eruption combined with a gingival fiberotomy of a right maxillary canine was performed for 1 month after the dental implant had been simultaneously placed with bone grafts on a right maxillary lateral incisor. About 5 months after implant placement, 2nd surgical operation was performed. The provisional restorations were adjusted to make esthetic gingival contour for 8 weeks. The porcelain fused gold restorations were fabricated and set. The patient was satisfied with the final restorations in esthetic and functional aspect.

신디케이션 모델(Syndication Model)을 적용한 지적정보 활용 비즈니스 모델 수립

김경규,이봉규,이중정,장항배,Kim, Kyung-Kyu,Lee, Bong-Gyou,Lee, Choong-Cheong,Chang, Hang-Bae 한국공간정보시스템학회 2005 한국공간정보시스템학회 논문지 Vol.7 No.3

최근 지적 및 토지 관련 정보화사업의 지속적 추진과 토지 가격의 안성 그리고 부동산 증권화 제도 도입 등 지적 정보를 둘러싼 환경 변화에 부응하는 새로운 형태의 지적정보를 활용한 사업의 중요성이 부각되고 있고, 지적정보에 대한 사회적 수요가 증대하고 있다. 본 연구의 목적은 상기한 환경 변화에 대한지적공사가 효과적으로 대처하기 위해 지적정보를 활용한 위치정보 제공에 관한 특화된 사업화 전략을 수립하여 제시하는 것이다. 본 연구에서는 현재 또는 향후 지적정보를 사용하고 있는 고객에 대하여 충족되지 않고 있는 요구들을 조사하였다. 또한 대한지적공사의 핵심 역량과 자원시스템을 분석하여 고객 중심의 서비스 강화 및 수익성 향상을 도모하는 신디케이션 비즈니스 모델을 설계하고 구체적인 실행계획을 제시하였다. 연구 결과물들은 향후 GIS, ITS, 텔레매틱스 등의 유사분야에서도 학문적으로나 실증적으로 접목되어 활용될 수 있을 것이다. With the recent surge of public interests in real estate markets, public demand on cadastral information including cadastral maps has been increasing rapidly. However, the torrent system that provides cadastral information falls far short of meeting public demand due to its main focus on government users. In order to reduce the gap between public demand and supply of cadastral information, a new business model is needed that fulfills public needs and at the same time generates profits for service providers. The main objective of this paper is to identify a potential business model that satisfies the above conditions. To achieve this objective, we have explored the unmet needs of public users in real estate transactions and examined whether the unmet needs can best be served by the resources and capabilities of Korea Cadastral Survey Corporation. Then, we have crafted a detail business model i.e., Syndication model, that includes value propositions, resource maps, and revenue and cost estimations. Finally, a plan is proposed to serve government users better with the financial surplus from the proposed business model. The results of this study can be useful for other similar areas including GIS, ITS and telematics, academically as well as practically.

DNA 3차원 구조 신비 밝혔다

김경규,Kim, Gyeong-Gyu 한국과학기술단체총연합회 2005 과학과 기술 Vol.38 No.12

도재 수리시스템에 따른 도재와 복합레진의 전단결합강도

김경규,신상완,이정렬,김영수,Kim, Kyoung-Kyu,Shin, Sang-Wan,Lee, Jeong-Yeol,Kim, Young-Su 대한치과보철학회 2007 대한치과보철학회지 Vol.45 No.4

Purpose: This in vitro study evaluated shear bond strengths of surface treatment porcelains with four porcelain repair systems simulating intraoral bonding of composite resin to feldspathic porcelain or pressable porcelain. Material and methods: Eighty Porcelain disks were prepared. Group A: forty disk specimens were fabricated with Feldspathic Porcelain($Omega^{(R)}900$, Vident, Menlo Park, CA, USA). Group B: forty disk specimens were fabricated with Pressable Porcelain(IPS Empress 2 ingot, Ivoclar-Vivadent, Schaan, Liechtenstein, Germany). Each groups was divided into 4 subgroups and composite resin cylinders were bonded to specimen with one of the following four systems: Clearfil Porcelain Bond(L. Morita, Tustin, CA, USA), Ulradent Porcelain Etch. (Ultradent, Salt Lake City UT, USA), Porcelain Liner-M(Sun Medical Co., Kyoto, Japan), Cimara Kit(Voco, Germany). After surface conditioning with one of the four porcelain repair systems substrate surfaces of the specimen were examined microscopically(SEM). Shear bond strengths of specimens for each subgroup were determined with a universal testing machine (5mm/min crosshead speed) after storing them in distilled water at $37{\pm}1^{\circ}C$ for 24 hours. Stress at failure was measured in $MP_a$, and mode of failure was recorded. Differences among four repair systems were analyzed with two way ANOVA and Duncan test at the 95% significance level. Results: In the scanning electron photomicrograph of the treated porcelain surface, hydrofluoric acid etched group appeared the highest roughness. The shear bond strength of the phosphoric acid etched group was not significantly(p>0.05) different between feldspathic porcelain and pressable porcelain. But in no treatment and roughened with a bur group, the shear bond strength of the feldspathic porcelain was significantly higher than that of the pressable porcelain. In hydrofluoric acid etched group, the shear bond strength of the pressable porcelain was significantly higher(p<0.05). Conclusion: 1. Treatment groups showed significantly greater shear bond strengths than no treatment group(p<0.05). 2. Group with more roughened porcelain surface did not always show higher shear bond strengths. 3. In phosphoric acid etched group, there was no significant difference in shear bond strength between feldspathic porcelain and pressable porcelain(p>0.05). However in the other groups, there were significant differences in shear bond strengths between feldspathic porcelain and pressable porcelain(p<0.05).

정보자산보호 성과가 조직성과에 미치는 영향에 관한 연구: 관리활동과 통제활동을 중심으로

김경규,신호경,박성식,김범수,Kim, Kyung-Kyu,Shin, Ho-Kyoung,Park, Sung-Sik,Kim, Beom-Soo 한국과학기술정보연구원 과학기술정보센터 2009 Journal of Information Science Theory and Practice Vol.40 No.3

최근 기업에서는 정보자산을 여러 가지 통제 및 관리 수단을 통해 보호활동을 하고 있다. 그러나 보호수준을 높게 요구할수록 업무 수행의 불편함으로 단기적인 효율성 및 생산성이 감소하게 되었다. 이와 함께 조직의 정보보호를 위한 투자가 지속적으로 증가함에도 불구하고 정보보호 성과측정을 위한 체계적인 방법이 제시되지 않아 정보보호 투자 의사결정 및 정보보호 개선 방향 도출이 어려운 것이 현실이다. 본 연구에서는 기업의 정보자산의 보호에 대한 개념을 정립하고자 하였다. 이를 위해 문헌연구를 바탕으로 정보자산보호를 위한 활동의 유형을 관리활동과 통제활동으로 분류하여 이들이 정보자산보호활동의 성과와 조직 성과에 미치는 영향을 연구하였다. 본 연구를 위해 이론연구와 더불어 실증적 연구분석을 위해 설문조사를 실시하였으며, 수집된 자료는 PLS(Partial Least Square)를 이용하여 측정모형 및 가설검증을 실시하였다. 통계분석 결과, 정보자산보호 관리활동은 정보자산보호 성과에 긍정적 영향을 미치며, 정보자산보호 통제활동은 정보자산보호 성과에 유의한 영향을 미치지 않는 것으로 나타났다. 또한 정보자산보호 성과는 조직 성과에 대해 긍정적인 영향을 미치는 것으로 나타났다. 이 외에 본 연구결과에 대한 의의 및 한계점을 논의하였으며, 향후 연구에 대한 시사점도 언급하였다. Recently, enterprises are protecting information assets with the various means of control and management. Nevertheless, they are confronted with the dilemma which the higher securitylevel they request, the lesser efficiency and productivity in short terms they acquire by the inconvenience of business process. In addition, in spite of the steady increase of organization's investment on information protection, the systematic way for the performance measurement of information protection has not been suggested, so that in reality, it is difficult to make the decision to invest on information-protection and elicit the direction to improve it. For this reason, this study intended to establish the concept of the protection and security of information assets of enterprises and to categorize the type of activities to protect information assets into management activity and control activity, and analyze the effects of management activity and control activity for information asset protection on the performance of information asset protection activity and organization. For this research, questionnaire survey was conducted with literature study and the PLS(Partial Least Square) was used to analyze the measurement model and hypotheses testing. The PLS analysis results indicate that management activity for information asset protection affects information asset protection performance. Further, organizational performance is influenced by information asset protection performance. Practical implications of these findings and future research implications are also discussed.

모바일 웹 브라우징 서비스의 사용 의도에 영향을 미치는 요인

김경규(Kyung Kyu Kim),류성렬(Sungyul Ryoo),김문오(Moonoh Kim),김효진(Hyojin Kim) 한국데이타베이스학회 2009 Journal of information technology applications & m Vol.16 No.1

This paper aims to empirically examine how personal characteristics and social influence affect user acceptance of mobile web browsing service. To examine the intention to use mobile web browsing service, we applied the Technology Acceptance Model (TAM) which has been widely used to explain and predict the IT acceptance to this study. This research also includes personal characteristics such as computer self-efficacy, mobile self-efficacy, and personal innovativeness in IT and social influences such as subjective norms, image, and visibility as the external variables of the TAM. The results indicate that computer self-efficacy do not directly influence ease of use, but indirectly through mobile self-efficacy. And the results indicate that mobile self-efficacy and personal innovativeness in IT have direct effects on ease of use. Empirical results also show that subjective norms and image affect usefulness. Additional theoretical and practical implications of these findings are also discussed in the paper.

이달의 X-선 : 5년간 지속된 미만성 폐결절

김경규 ( Kim Gyeong Gyu ),김병규 ( Kim Byeong Gyu ),정기환 ( Jeong Gi Hwan ),정혜철 ( Jeong Hye Cheol ),김제형 ( Kim Je Hyeong ),박상면 ( Park Sang Myeon ),이신형 ( Lee Sin Hyeong ),신철 ( Sin Cheol ),조재연 ( Jo Jae Yeon ),심재 대한결핵 및 호흡기학회 2000 Tuberculosis and Respiratory Diseases Vol.48 No.5

칼만 필터 기반 관성 측정 센서를 이용한 야구 스윙 궤적 분석 시스템 제안

김지한(Jihan Kim),김동욱(Donguk Kim),배준형(Junhyeong Bae),전수형(Suhyeong Jeon),박민희(Minhee Park),한병하(ByeongHa Han),이원준(Wonjun Lee),김진성(Jinseong Kim),한찬호(Chanho Han),김경규(KyoungKyoo Kim) 한국통신학회 2023 한국통신학회 학술대회논문집 Vol.2023 No.6

자세 변화와 도구 사용 시 최대 들숨과 날숨 시 호흡근의 근활성도 차이

김근조(Keun-Jo Kim),장영(Zang Rong),조동혁(Dong-hyeok Jo),정주은(Ju-eun Jeong),김경규(Gyeong-gyu Kim),김문규(Mun-kyu Kim),김민지(Min-zy Kim),김현승(Hyun-seung Kim),박경현(Kyeong-hyeon Park),박새롬(Sae-rom Park),이영준(Yeong-jun Lee) 대한심장호흡물리치료학회 2021 대한심장호흡물리치료학회지 Vol.9 No.1

Purpose : In this study, we aimed to measure how respiratory muscle activity changes as posture changes. We also aimed to measure the inspiratory sternocleidomastoid (SCM) and upper trapezius (UT) muscle activities as well as expiratory rectus abdominis (RA) and oblique abdominis (OA) muscle activities in healthy male and female university students in their twenties. Methods : Using the percentage of reference voluntary contraction (% RVC) with electromyography, we measured the SCM, UT, RA, and OA muscle activities in 16 healthy male and female university students in their 20s according to position change and breather tool use. Results : We found that the average value of inspiratory and expiratory muscle activities by posture was highest when using the breather tool. When using the tool with 10-mm and 2-mm straws for standard breathing at rest in the sitting position, a statistically significant increase in SCM, UT, and OA activities occurred (p < 0.05). For standard breathing at rest in the supine position, a statistically significant increase in SCM, RA, and OA activities occurred (p < 0.05). Conclusion : In clinical application, it may be better to use a respiratory muscle-strengthening tool to increase the activity of inspiratory and expiratory muscles.

정보시스템 사용자 만족에 관한 실증 연구

김경규(Kyung Kyu Kim),박석원(Seok Won Park) 한국경영학회 1997 經營學硏究 Vol.26 No.1

Measuring of information system(IS) effectiveness has been considered important both for academics and practitioners. IS effectiveness is an ultimate dependent variable in academic research, while it is used as an important criterion for investment decision making in the real world. User information satisfaction (UIS) has been widely used as a surrogate measure for IS effectiveness. However, prior research incorporating UIS as a dependent variable has found mixed results, because UIS is defined in many different ways depending upon the researchers. This research attempts to develop a conceptual model of UIS by sorting out different constructs--that is, user attitudes, information quality, IS usage, and organizational effectiveness--intermixed in existing UIS measures. A field study was conducted to test the research hypotheses, using middle level managers in Korea Telecommunications (KT) as a sample. Sample subjects were end-users of billing and accounting information systems in KT. Research results have found that information quality influences organizational effectiveness as well as IS usage in a positive way. However, contrary to our expectations, user attitudes and IS usage are not significantly related to organizational effectiveness. The research findings suggest that organizations put much emphasis on enhancing the quality of IS information than merely increasing IS usage. Future research implications and limitations of this research are also discussed.