한국판 국제 소아천식 및 알레르기 질환 연구 설문지의 신뢰도 및 타당도 연구

최성우,주영수,김대성,김재용,권호장,강대희,이상일,조수헌,Choi, Seong-Woo,Ju, Yeong-Su,Kim, Dae-Sung,Kim, Jae-Yong,Kwon, Ho-Jang,Kang, Dae-Hee,Lee, Sang-Il,Cho, Soo-Hun 대한예방의학회 1998 예방의학회지 Vol.31 No.3

Recent increases of asthma and allergies in childhood made the need for a standardized approach to international and regional comparisons of their prevalence and severity. To address these issues, 'International Study of Asthma and Allergies in Childhood (ISAAC)' is currently underway. In Korea, 'Nationwide Study of Asthma and Allergies in Korean Children' began in 1995 according to ISAAC protocol. ISAAC written and video questionnaires were used in this survey, but their reliability and validity were not evaluated properly yet. In this study, our aim was to evaluate the reliability and validity of two kinds of questionnaires and their usefulness in international and regional comparisons. The test and retest of two questionniares were completed by male(n=110) and female(n=111) middle school students with two and three weeks interval each. Kappa(or weighted kappa) were calculated from each questions and validity coefficients were estimated from those statistics. In Korean version of written questionnaire, the questions for allergic rhinitis, atopic dermatitis, allergic conjunctivitis, and food allergy proved to have high kappa values (or weighted kappa values) and validity coefficients and they can be used in further studies without any correction. But some questions about asthma(especially nocturnal cough, wheezing in exercise, and severe asthma) and drug allergy need to be revised for better under-standing to study subjects. Video questionnaire has the same degree of reliability and validity when compared to written questionnaire and this is the unexpected result. Accordingly, it also need to be revised to overcome the racial and cultural differences of the study subjects. In conclusion, the Korean version of written and video questionnaires may be considered to be useful methods in international and regional comparisons of asthma and allergic diseases in childhood after correction of some questions.

HomePNA 2.0 모뎀 수신부 설계

최성우,김종원,Choi, Sung-Woo,Kim, Jong-Won 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.9A

본 논문은 HomePNA 2.0 모뎀 칩을 위한 모뎀 수신부의 구조를 제안한다. HomePNA 2.0 전송 채널은 브릿지 탭과 HAM 대역의 영향 등으로 매우 열악하다. 이러한 채널을 통해 전송을 가능하게 하기 위해 HomePNA 2.0 은 훈련신호를 사용하여 매 프레임 마다 채널을 등화하고 FD-QAM 전송 방식을 선택적으로 사용한다. 따라서 모뎀 수신부는 일반적 QAM 방식 신호의 북조 기능과 함께 이러한 전송 방식의 특정을 최대한 상려 모뎀 수신 성 능을 극대화 히는 구조가 필요하다 연구 결과 모뎀 수신부의 가능을 송수신 상태에 따라 정상 수신 모드와 충돌 감지 오드의 2 가지로 정의 하였다 본 논문은 특히, 모뎀 수신부를 구성하는 핵심 블록인 등화기와 위상 동기부, 프레임 동기부에 대해서 사용된 알고리즘을 밝혔으며, 버스트 방식 모뎀의 채널 등화 성능을 높이고 안정적으로 동작 시키기 위한 구조를 제얀 하였다 마지막으로 제안된 모뎀 수신부의 성능을 분석하기 위해서 SPW 모델을 사용하여 채널 별 전송 가능 속도를 예측 하였다. In this paper, we propose the architecture of modem receiver to fabricate HomePNA 2.0 chip. HomePNA suffers from inferior channel because of bridge tap, the effect of amateur HAM band and so on. To transfer data over such channel, HomePNA 2.0 uses training sequence to equalize channel and uses FD-QAM optionally as modulation method. So modem receiver demodulate QAM based signal and needs optimum architecture that fully uses these transmission feature. As a result of research, we define 2 mode function of modem receiver depending on TX/RX state. In this paper, particularly, we show the algorithm of equalizer, carrier phase recovery and frame synchromzationblock and propose architecture that improve the performance of channel equalization and is stable in operation. In the end, we estimate the performance of proposed HomePNA2.0 modem receiver over HomePNA TEST LOOP using SPW program.

성인에서 발생한 단발성 근섬유종

최성우,박종갑,김태윤,김형옥,김정원,강석진 ( Sung Woo Choi,Jong Gap Park,Tae Yoon Kim,Hyung Ok Kim,Chung Won Kim,Seok Jin Kang ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.5

Myofibroma and myofibromaiosis are uncommon, benign, mostly self-limiting, probably hamartomatous proliferation of myofibroblasts. These tumors are most often present at birth or before the age of 2 years with multiple ot solitary lesion. Adult cases are rare and most,ly showed as a solitary lesion. We present a case of solitary myofibroma that developed on the vertex of scalp in a 51-year-old man. The lesion was a mild tender and intermittent pruritic firm, pedunclated 1 1cm sized tumor. The iumor was diagnosed as myofibroma by light microscopy and immunohistochemistry. (Korean J Dermatol 1907;35(5): 1031-1035)

콘크리트용 골재로써 철강산업 부산물의 활용

최성우,김영선,류득현,조봉석,Choi, Sung-Woo,Kim, Young-Sun,Ryu, Deug-Hyun,Cho, Bong-Suk 한국건설순환자원학회 2019 한국건설순환자원학회지 Vol.14 No.2

진피하 기저세포암

최성우,양정은,장인강,김형옥,조성필 ( Sung Woo Choi,Jeung Eun Yang,In Gang Jang,Hyung Ok Kim,Seong Pil Joh ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.5

Basal cell carcinomas usually arise from the epidermis and show some epidermal connections. It is very unusual that basal celi carcinomas occur as subderrnal mass without epidermal connections. A 51 year-old female h;d an asymptomatic skin colored indurated plaque with linear old scar on the left side of nose fcr about 20 years. She had had a tumor that supposed to be a epidermal cyst, on the same site and the lesion was excised about 20 years ago. We performed the punch biopsy on her first visit which revealed hypertrophic scar. She was treated with intralesional injection of triamcinolone acetonide to reduce the size of hypertrophic scar. However, the lesion had not been reduced. She underwent the surgery to remove the scar at plastic surgery and the excisional biopsy showed a subdermal basal cell carcinoma. We recommend that the newly developed skin tumor in the pre-excised region should be required excisional biopsy instead of punch and close observation (KOfean J Dermatol 1997;35(5): 1036-1039)

스마트 영상보안감시 서비스 품질이 지속적 사용 의도에 미치는 영향

최성우(Choi, Sung-woo),한희은(Han, Hee-eun),유영선(You, Young-sun) 한국서비스경영학회 2014 한국서비스경영학회 학술대회 Vol.2014 No.11

본 연구는 민간영역의 스마트 영상보안감시 시스템을 운용하는 사용자를 대상으로 그들이 느끼는 관리서비스 품질 및 시스템(기능적)서비스 품질에 대해 각각 SERVQUAL 5개 요소인 독립변수, 즉, 신뢰성, 확신성, 유형성, 공감성, 대응성 요인으로 구분하여 실제 사용고객이 느끼는 심리적 안정과 만족감을 매개변수로 스마트 영상보안감시 시스템의 지속적 사용의도에 미치는 영향을 알아보고자 한다. 분석 결과, 관리서비스 품질의 신뢰성, 확신성, 유형성, 대응성, 공감성 변수 요인은 심리적 안정과 고객 만족에 유의 하지 않는 것으로 나타났으며, 시스템서비스 품질이 심리적 안정과 고객만족에 일부 유의한 결과를 얻었다. 심리적 안정에는 시스템서비스 품질 요인 중에서 대응성이 유의하게 나타났고, 고객만족에는 대응성과 확신성이 유의한 것으로 나타났다. 여기서 흥미로운 사실은 시스템서비스 품질 요인 중에서 대응성은 부(-)의 영향이 유의하다는 사실이다. 이러한 결과는 실제 CCTV의 사용자들은 멀티미디어 접속 및 접근에 쉽지 않는 인터페이스로 인해 오히려 불편을 느낀다는 것을 보여준다. 따라서 시스템 제조업체는 대응성과 같은 부(-)영향을 미치는 요인을 반영하여 제품 개발을 하여야 할 것이다. 또한 심리적 안정, 고객만족, 지속적 사용 의도 간의 관계는 모두 유의한 것으로 나타났으며, 추가적으로 심리적 안정과 지속적 사용 간의 관계에서 고객 만족의 매개효과를 검정해 보았다. Sobel-test의 매개효과 검정 결과, 고객의 만족은 심리적 안정과 지속적 사용에 매개 역할을 하는 것으로 판명되었다. This thesis is focused on how the users" mental stability and satisfaction would affect on the users" continuous use intention of the smart video surveillance system. For that purpose, I studied the degree of satisfaction in the quality of management and system (functional) service of private smart video surveillance system users, according to SERVQUAL"s five dimensions: reliability, assurance, tangibility, empathy, and responsiveness. As a result of the hypothesis of this research model, the management service has been proved to be disqualified in SERVQUAL"s all five dimensions, and assurance and responsiveness of the system service to be effective to the users" continuous use intention. This research has revealed that the provider of the smart video surveillance system has to focus not on the management services, but on the hardware aspects. With this, developing products optimized for more responsiveness and assurance and surveying the consumers" response will be necessary for the provider to develop more competitive security system and to decrease the customer desertion rate.

Monoethanolamine을 함침한 ZSM5와 MS13X의 CO<SUB>2</SUB> 흡착특성 비교

최성우(Sung-Woo Choi) 大韓環境工學會 2017 대한환경공학회지 Vol.39 No.6

Monoethanolamine (MEA)으로 함침한 ZSM5와 Molecular Sieve 13X (MS13X)에 대한 이산화탄소 흡착실험을 실시하였다. 이산화탄소 흡착효율은 U자관 컬럼 반응기를 사용하였으며 GC/TCD로 분석을 하였다. 흡착제별 흡착온도는 30~80℃에서 흡착능을 평가하였다. 개질화된 흡착제의 표면특성을 알기 위해 BET분석, N2 흡·탈착, XRD, FT-IR분석을 실시하였다. 표면분석결과 함침된 아민은 흡착제 내 결정의 형성에 영향을 주지 않으며 아민으로 함침된 MS13X의 BET표면적은 718.335 m<SUP>2</SUP>/g에 19.945 m<SUP>2</SUP>/g으로 감소하였다. 이 결과는 MS13X의 기공부피에 아민 분자가 채워짐으로써 질소흡착을 제한하는 것으로 보인다. MS13X-MEA는 ZSM5-MEA비해 이산화탄소 흡착능의 개선효과가 있었으며 이는 물리적 흡착과 화학적 흡착에 의한 것으로 사료된다. 또한 MS13X-MEA의 이산화탄소 흡착능은 MS13X에 비해 60~80℃의 온도에서도 증가됨을 보여주었다. Adsorption experiments of carbon dioxide were performed on ZSM5 and Molecular Sieve 13X (MS13X) impregnated with Monoethanol Amine (MEA). Adsorption efficiency of CO2 was investigated in a U type packed column with GC/TCD. The adsorption capacities of adsorbents are estimated in the temperature range of 30-80℃. The modified adsorbents was characterized by BET surface area, N2 adsorption/desorption isotherms, X-ray diffraction and FT-IR. Surface analysis results showed that the impregnation method did not affect the crystallinity of any adsorbents. BET surface area of the MS13X impregnated amine decreased to 19.945 m<SUP>2</SUP>/g from 718.335 m<SUP>2</SUP>/g. These reults showed that amine molecules were filled with the pore volume in MS13X, as a results restricting access of nitrogen into the pores. The MEA modified MS13X showed improvement in CO2 adsorption capacity over the ZSM5 impregnated with MEA. The MS13X-MEA showed the highest adsorption capacity due to physical adsorption and chemical adsorption by amino-group content. This results also showed that adsorption capacity of MS13X-MEA increases with the temperature range of 60-80℃ compared with pristine MS13X.

비용매 첨가법을 이용한 Dextran 분별침전에 관한 연구

최성우(Sung-Woo Choi),구윤모(Yoon-Mo Koo) 한국생물공학회 1995 KSBB Journal Vol.10 No.3

산업부산물 골재를 사용한 콘크리트의 내동해성 평가

최성우 ( Choi¸ Sung-woo ),류득현 ( Ryu¸ Deug-hyun ) 한국건축시공학회 2021 한국건축시공학회 학술발표대회 논문집 Vol.21 No.2

Various attempts are being made to reduce carbon emissions through recycling of industrial by-products in the construction materials industry to reduce carbon emissions, and cement substitutes such as blast furnace slag and fly ash are widely used. Although it is suggested that the use of industrial by-product aggregate is possible in 'Aggregate', the use case of industrial by-product aggregate is very rare in the actual field. In this study, as an industrial by-product, fine slag aggregate is used as fine aggregate among aggregates that can be used as aggregate for concrete, and coarse aggregate is used as a substitute for natural aggregate. WWe tried to suggest various ways to expand the use of industrial by-product aggregates.

제조업의 서비스화 유형분석 사례연구

최성우(Choi Sung-Woo),이성필(Lee Sung-Pil),카즈오 스기야마(Kazuo Sugiyama) 한국디자인학회 2010 한국디자인학회 학술발표대회 논문집 Vol.2010 No.10

The term "servicescape" originally points to the physical space in which a service process takes place, but in this particular context it represents the content of the service or the situation or state of the service being offered. In other words, it is used as "a place" in a broader sense. Servicescape generally expands as equipment develops. In this paper, I considered how equipment has developed as an expansion of servicescape by taking a digital camera for example. As a result, it was confirmed that for digital cameras in the initial stages whose number of pixels, memory capacity and battery life were all either small or short, no definite servicescape was formed, If you divide the functions of a product into internal and external ones (Sugiyama 2005), initial-stage digital cameras were equipment of which external functions are not clear. Several points were revealed, however, including one that digital camera-specific servicescape has been developed today. It can be attributed to a fusion of a digital camera's external and internal functions represented by a camera "that does not miss the perfect shot of your smiling face" on the one hand. On the other hand, thanks to the progress of printers and personal computers, the part that corresponds to photographic development or album editing has progressed so that you may be able to handle it on your own. in addition, it was shown that thanks to the progress of e-mail, as seen in blogs, a culture that utilizes an image (picture) that will never be printed out is being created as well. Kameoka (2007) summarized the expansion of service encounter by means of equipment into the following three: Extension of Adjustment; Extension of Territory; and Extension of Commitment. This paper discusses that the range that the example described above indicates does not necessarily fit in these three.