• Korea Trade Review
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• v.48 no.4
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• pp.321-342
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• 2023

This study aims to derive policy implications by analyzing the experiences of Korean ICT startups that participated in the government's online export and trade consultation platform, designed to support ICT startups' overseas expansion during the COVID-19 pandemic. The research methodology involved the analysis of semi-structured, in-depth interviews with six startups who participated in an online export and trade consultation platform, using Giorgi's phenomenological methodology. The analysis resulted in the identification of ten subcategories, including two subcategories for each of the five categories. These categories and subcategories offer a comprehensive understanding of the experiences of ICT startups in navigating the online export and trade counseling platforms. The findings suggest that online export and trade consultation platforms for ICT startups offer efficiency benefits by reducing time and space constraints, but they also reveal limitations in terms of practical business continuity. This study holds academic and practical significance by providing insights into how ICT startups navigate online export and trade counseling platforms during the pandemic.

• Journal of the Korean Geotechnical Society
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• v.17 no.1
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• pp.5-13
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• 2001

강도 또는 변형 이방성은 층리진 최적암, 박층모양의 변성암, 균일하게 절 리가 나있는 암석에서 흔히 볼 수 있다(Amadei, 1982, 1996). 특히, 대구지역은 퇴적암의 일종인 셰일로 구성되어 층리면의 각도에 따라 역학적인 특성이 달리 산정되어져야 한다. 이에 본 연구에서는 층리면의 각도를 달리하여 시료를 성형한 후 각종 시험을 수행하였다. 그 결과 일축 압축강도는 수평면과 층리면이 이루는 각이 0$^{\circ}$, 90$^{\circ}$에서 최고 강도를, 60$^{\circ}$에서 최저 강도를 나타내었다. 또한 간접 인장시험과 점 하중시험, 탄성파시험에서는 90$^{\circ}$에서 최고값을, 0$^{\circ}$에서 최저값을 보였다. 그리고, 층리에 따른 퇴적압의 일축 압축강도를 간접 인장강도, 점하중강도와의 상관성을 분석하여 각각의 관계를 회귀분석을 통한 상관식으로 나타내었다. 추가적으로 층리에 따른 공학적특성을 정량적으로 나타내었다.

• Journal of the Korean Vacuum Society
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• v.2 no.2
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• pp.171-180
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• 1993

X-ray photoelectron diffraction (XPD) is used to characterize the crystallographically cleaved GaAs(110) surface. By using polar and azimuthal scans of the usual angle-resolved x-ray photoelectron spectroscopy, we get the reconstruction geometry of the clean GaAs(110) surface from the intensity ratio of Ga 3d core-level peaks. The reconstruction parameters are determined by fitting the diffraction pattern with the single scattering cluster (SSC) model, and the results show similar tendencies to those obtained by other techniques.

• Journal of the Korean GEO-environmental Society
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• v.11 no.12
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• pp.19-25
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• 2010

Inventory survey is process collecting data about cut slope. It's different from inspection. Collected data are being used get at status about cut slope along national roads. And we analyse between current situation and data about collapse slope. It helps finding better method about maintenance of cut slope. We found changes in the situation between data at present and data at 10 years ago. We will research collapse and counterplan by cause.

• The Journal of Engineering Geology
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• v.26 no.2
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• pp.187-196
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• 2016

We conducted three-dimensional finite element analysis to predict the presence of upcoming fault zones during tunneling. The analysis considered longitudinal displacements measured at tunnel face, and used 28 numerical models with various fault attitudes. The x-MR (moving range) control chart was used to analyze quantitatively the effects of faults distributed ahead of the tunnel face, given the occurrence of a longitudinal displacement. The numerical models with fault were classified as fault gouge, fault breccia, and fault damage zones. The width of fault cores was set to 1 m (fault gouge 0.5 m and fault breccia 0.5 m) and the width of fault damage zones was set to 2 m. The results, suggest that fault centers could be predicted at 2~26 m ahead of the tunnel face and that faults could be predicted earliest in the 45° dip model. In addition, faults could be predicted earliest when the angle between the direction of tunnel advance and the strike of the fault was smallest.

• Knowledge Management Research
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• v.22 no.3
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• pp.235-252
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• 2021

The development of information and communication technology and COVID-19 have caused an unusual change in the hotel industry, and the demand for the contactless services such as service robots from hotel customers has surged. Therefore, this study investigates the perception of hotel customers on contactless services by applying a mixed-method analysis. Specifically, this study identified the causal correlations between variables through the structural equation model, and further applied the fuzzy set qualitative comparison analysis to derive patterns of variables that form the intention to use the non-face-to-face services. As a result of the analysis, it was shown that service experience co-creation, palyfulness, personalization, and trust had a significant effect on intention to use through the contactless service use desire. On the other hand, in the results of fuzzy-set qualitative comparison analysis, playfulness was derived as a core factor in all patterns. Based on these analysis results, this study provides academic basis for in-depth understanding of hotel customers' perception of contactless service and specific guidelines for hotel managers on the contactless service strategies in the era of COVID-19 pandemic.

• The Journal of the Convergence on Culture Technology
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• v.7 no.4
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• pp.421-428
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• 2021

This study intended to identify the differences of pre-service elementary school teachers' perceptions on instructional design between face-to-face and online instruction. Lesson plans for face-to-face and online instruction were analyzed by 84 participants who were seniors at C university of education. Results of content analysis indicate that 'Providing Learning Guidance' domain is the biggest domain in terms of the frequency gap between face-to-face and online instruction. Frequency differences by domains between face-to-face and online instruction were found to be significant as a result of Chi-square test. Frequency differences by instructional elements in the 'Providing Learning Guidance' domain between face-to-face and online instruction were found to be statistically significant as well. In conclusion, this study indicates the differences of pre-service elementary school teachers' perceptions on instructional design between face-to-face and online instruction, which implies the necessity for the development and implementation of professional development programs focusing on the perceptions on instructional design of online instruction for pre-service elementary school teachers.

• Proceedings of the Acoustical Society of Korea Conference
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• autumn
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• pp.89-92
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• 2000

고주파 대역의 소오나를 이용하여 해저면 상태, 즉 해저면 거칠기 및 비균질성의 변화에 따른 음파 산란 영향을 파악하기 위한 실험을 실시하였다. 지음향 요소 중, 평균 입도 크기(mean grain size)는 입도 분석을 통하여 결정하였으며, 이를 기초로 하여 나머지 요소들(Density, Velocity Ratio 등)을 결정하였다. 또한 공극률을 측정하여 평균 입도 크기와 비교함으로써, 공극률과 입자 크기 사이의 관계를 나타내보고자 하였다. 이렇게 파악된 해저면 특성들과 해저면에 의해 산란되어 들어오는 신호의 분석을 통하여 해저면의 상태에 따른 신호의 변화를 비교하였다. 획득된 자료들은 해저면의 상태, 즉 해저면 연흔(ripple)의 유무와 해저면내의 비균질성에 따라 수신되는 신호에 차이를 나타내었으며, 또한 입사각, 산란 각 및 방위각의 변화에 따라 신호에 차이를 보였다. 수신된 신호들간의 비교를 통하여 해저면내의 비균질성의 차이에 따른 산란 음파의 변화 양상을 파악하고자 하였다.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.23 no.3
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• pp.236-247
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• 2011

This study investigates sea level (SL) rise due to global warming in the Northwestern Pacific (NWP) and Seas around the Korean peninsula (KP) using outputs of IPCC AR4 climate models. Particularly, components of the SL rise induced by a local steric effect, which was not considered in most climate models, were computed using model-projected 3-dimensional temperature and salinity data. Analysis of the SL data shows that the ratio of the SL rise in the NWP and KP was about two times higher than that in global mean and particularly the ratio in the Kuroshio extension region was the highest. The SL rises over 100 years estimated from MPI_ECHAM5 and GFDL_CM2.1 model by A1B scenario considering the thermosteric effect were 24 cm and 28 cm for the NWP and 27 cm and 31 cm for the Seas around the KP, respectively. Statistical analysis reveals that these SL rises are caused by the weakening of the Siberian High in winter as well as variations of pressure system in the NWP and by the resultant change of water temperature. It also found that the highest SL rise in the Kuroshio extension region of the NWP was connected with the large increase of water temperature in this area.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.485-488
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• 2006

SLA and SST is high in summer and fall, it is low in spring and winter. The clearly annual period shows through the power spectrum density. A semi-annual period and seasonal period appeared, In. At sea surface variation of satellite data(Mean Sea Level Anomaly) and in-situ data, coefficient-correlation show 0.323 at Mukho which is located in the coastal. Chujado and Ulleungdo is a 0.685 and 0.780, retentively. A coefficient-correlation of SST show higher than sea surface variation as Mukho-0.920, Chujado-0.894 and Ulleungdo-0.815. A comparison between SST and MSLA show 0.77, SST appeared faster about 1 to 3 months than MSLA.