http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
여행사 광고와 홍보의 개선방안에 관한 연구 <국외 여행상품을 중심으로>
조성찬 관광경영학회 1997 관광경영연구 Vol.1 No.-
The purpose of this study was to identify the defect of advertisement for overseas travel goods especially considered that to have to be changed or improved in the nearest future. It was hoped that the results of this study will provide to the enterprise as a satisfaction model for the tourism advertisement especially considering the effect of the social psychological characteristics. In tlZe regard, it has been made an approach by the two methodological types. First, an indepth research being related literature was made to suport the theoretical foundation on the outbound travel goods and statistical data. Second, in order to provide an empirical evidence the study performed an interview of the peoples who work in tourism company. A total marketing stategy ahould be use on the tourist psychological characteristics, targeting, positioning, etc. The interrelationships among the tourist themselves need to be carefully considered. The promotion strategy stimulating the customer`s expection as well as offering the realiable information should developed.
확장된 새로운 층 방법을 이용한 사다리꼴 회절격자의 TM 모드의 결합계수 계산
조성찬,이동찬,김부균 대한전자공학회 1998 電子工學會論文誌, D Vol.d35 No.9
확장된 새로운 층 방법을 이용하여 사다리꼴과 삼각형 형태의 회절격자 구조를 가지는 5층의 DFB 구조 소자의 TM 모드의 결합계수를 계산하였다. TM 모드의 unperturbed 필드 분포를 쉽게 계산하기 위하여 회절격자 영역의 비유전상수의 역수를 종축과 횡축 양 방향으로 평균값을 취하여 새로이 설정하는 층의 비유전상수의 역수가 되도록 설정하였다. 확장된 새로운 층 방법이 TM 모드의 결합계수 계산에도 유용하게 사용될 수 있음을 회절격자 영역의 등분할 층수를 6층까지 늘려가며 self-consistent하게 검증하였다. TM mode coupling coefficients for a generic five-layer DFB structure with trapezoidal and triangular gratings are calculated using the extended additional layer method. To determine the unperturbed field distributions of TM modes, a grating region is replaced by a new uniform layer whose inverse dielectric constant is the average value of the inverse dielectric constant of grating region in both longitudinal and transverse directions. Based on the self-consistent check, the validity of this method is established by comparing the results calculated by partitioning the grating region up to six uniform layers.
기하광학 방법을 이용한 사다리꼴 회절격자의 결합계수 계산
조성찬,김부균 대한전자공학회 1997 電子工學會論文誌, D Vol.d34 No.7
Using the ray optics technique, we derive the analytic expressions of TE mode coupling coefficient for five-layer distributed feedback (DFB) structure devices. We compare the coupling coefficient calculated by the ray optics technique with those calulated by the extended additional layer method (EALM) which may be a most accurate method of calculating the coupling coefficient. The difference between the results of the ray optics technique and those of the EALM is small for most cases of grating depth and forms being practically made. In the case of rectangular gratings, the difference increases as the duty cycle of graing deviates from 0.5. In the case of the trapezoidal grating, the difference increases as the ratio of the top to the period of grating deviates from 0.5 and as the length of the top becomes longer than that of the base. The difference of theree-layer DFB structures is smaller than that of five-layer DFB structures.