The importance of eWOM (electronic word-of-mouth) communication through online communities is increasing on a daily basis. This study analyzed how the relationship between eWOM (electronic Word-Of-Mouth) factor and eWOM communication depends on the cultural orientation of users in the online community. The research model was developed based on four cultural orientations of individual affect Social tie and usefulness. The model consists of variables such as social tie and perceived usefulness as predecessors of eWOM, four dimensions of cultural orientation (Horizontal Individualism, Horizontal Collectivism, Vertical Individualism, Vertical Collectivism), and eWOM. The model was tested empirically using the PLS (partial least squares) structure equation model. Survey was conducted for online community users in South Korea. Data was statistically validated whether fits on research model. The study results reveal that Social Tie have a positive effect on Perceived Usefulness. Social Tie and Perceived Usefulness have a positive effect on eWOM. 3 of cultural orientations (HC, VI, VC) have a positive effect on Social Tie. Only one of cultural orientations (HC) have an negative effect on Perceived Usefulness. Especially, horizontal collectivism (HC) shows strong correlation with perceived usefulness, whereas vertical collectivism (VC) shows weak correlation with perceived usefulness andvertical individualism (VI) shows strongly correlation with social tie, whereas horizontal individualism (HI) shows weak correlation with social tie. Based on the study results, customized service strategy could be formulated according to the different vertical styles and various eWOM factors.

이 논문은 추모와 기억이 작동하는 방식에 대한 이론적 논의를 바탕으로 예이츠의 “1916년 부활절 봉기”를 분석한다. 기억과 망각, 기념과 반기념이라는 대립적 개념의 긴장을 통해 희생자들에 대한 예이츠의 양가적이고 분열적인 욕망을 읽어낸다.

Purpose：Conventional pre-saturation pulse for suppressing venous signals cannot be applied to time-of-flight magnetic resonance angiography(TOF-MRA) at 7 Tesla MRI due to specific absorption rate(SAR) limitation. The SAR could be attenuated with using low saturation flip angle, but a few repetitions are needed to reach signals below the steady-state signal of the brain tissues. The purpose of this study was to suppress venous system with clinically acceptable acquisition time by using 90 degree flip angle. Methods：The standard slab-selective radio-frequency and gradient waveform were modified to new-shaped models by minimum-time variable-rate selective excitation(Min-VERSE) algorithm. Excitation slice profile was measured and evaluated by a phantom scan. In volunteer measurement, the vessel-tissue contrast ratio of the sinuses(VTCR_S) and middle cerebral artery(VTCR_MCA) were assessed in correlation to surrounding tissue and compared to the values measured by the conventional TOF(cTOF) pulse sequence. Results：The experimentally-measured profiles showed that there was good agreement between conventional and modified pulse. The total scan time was 5 min 55 sec(Min-VERSE 90 FA, TR 28 ms) and 8 min 50 sec(90 FA, TR 42 ms). The quantitative results of ROI analysis were nearly similar, except the venous signal and VTCR_S at Min-VERSE 90 FA. Conclusions：We have presented that the use of Min-VERSE with high flip angle was useful. The total acquisition time was faster about 3 minutes and the signal analysis was hardly different to the values acquired by the values of 90 FA at cTOF. Since 7T MRI has been suitable for ultra-high resolution imaging, our protocol would be used by default for diagnosing various intracranial vascular pathologies.