• Journal of Science Education
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• v.47 no.1
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• pp.1-10
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• 2023

In this study, we investigated the perception of STEAM (science, technology, engineering, arts, and mathematics) education consultants (SEC) about the requirements to achieve actual results and the improvements for STEAM education consulting. Data were collected from teachers who have had previous SEC experience or have extensive experience in STEAM education. First, an open-ended questionnaire was used to conduct a survey on the requirements and improvements for the STEAM education consulting, and items were composed by analyzing the contents of these free responses, and then statistical analysis was performed by asking them to respond on the Likert scale to how much they agreed to each item. As a result of the analysis, the SEC recognized that "formation of consensus between consultants and teachers", "consultant feedback on reflection of previous consulting results" and "encouragement and support for teachers" are appeared to be the most required for STEAM education consulting to achieve actual results. As the improvements of STEAM education consulting, "sharing cases and opinions among consultants", "selection and sharing of consulting best practices", and "development of various consulting types such as open classes" received the highest agreement. Based on these results, a support plan to increase the effectiveness of STEAM consulting was proposed.

• Journal of the Korean Geotechnical Society
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• v.39 no.12
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• pp.61-73
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• 2023

Suction buckets are feasible options for offshore foundations to support subsea structures in deep water, enabling suction-induced installation by pumps. Recently, hybrid suction bucket foundations that combine single or multiple suction buckets with a mat foundation have been considered. The foundations effectively increase the load capacity while reducing construction costs. However, there is still insufficient experimental validation of hybrid suction bucket foundations regarding their bearing capacity. Furthermore, research on the horizontal load capacity under low vertical and moment loads is inadequate. In this study, we investigate the feasibility of using a hybrid suction bucket foundation for subsea installations in clay. We considered two types of hybrid suction bucket foundations: a circular mat with a single suction bucket and a square mat with multiple buckets. Centrifuge tests were performed to understand the hybrid suction bucket foundation characteristics under horizontal loads and their corresponding bearing capacity. Particularly, we verified the effect of the mat foundation and bucket embedment depth on the horizontal bearing mechanism and capacities. Results confirmed that the hybrid suction bucket foundation outperforms the single suction bucket.

• Proceedings of the Korean Society for Quality Management Conference
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• 1998.11a
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• pp.413-418
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• 1998

In order to improve labor productivity in plants, it is important to grasp the existing problems there. But it is not easy for all the people in charge to have the same level understanding to those. This article suggests an approach to tackle with this situation by using various visualization techniques.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2004.08a
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• pp.1-6
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• 2004

• Proceedings of the Korea Water Resources Association Conference
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• 2005.09a
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• pp.563-564
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• 2005

• Bulletin of the Korean Space Science Society
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• 2000.10a
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• pp.112-112
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• 2000

• Proceedings of the Korean Society For Composite Materials Conference
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• 1999.04a
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• pp.254-257
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• 1999

• Communications for Statistical Applications and Methods
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• v.7 no.1
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• pp.87-96
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• 2000

Nonlinear time series prediction is derived and compared between statistic of modeling and neural network method. In particular mean squared errors of predication are obtained in generalized random coefficient model and generalized autoregressive conditional heteroscedastic model and compared with them by neural network forecasting.

• Bulletin of the Korean Space Science Society
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• 2002.05b
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• pp.58.1-58
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• 2002

• Journal of Construction Engineering and Project Management
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• v.5 no.3
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• pp.18-28
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• 2015

Bidding and contract systems are used for public construction projects to select contractors following fair competition principles and to execute national budgets effectively. Many challenges have arisen due to a lack of transparency and fairness and because bidding practices have been luck-based. Few comprehensive or comparative analyses have been conducted on the performance and limitations of bidding and contract systems, and empirical analyses designed to improve policies on and the practice of such systems are lacking. This study empirically analyzed current bidding and contract systems to seek ways of improving them. The study proposes several alternatives to resolve the problems with and irrationalities of the current system: 1) improving bidding and selection systems by changing them from a luck-based price competition into a technical merit- and value-based competition; 2) improving the assessment criteria to meet the current market level of bid and winning prices; 3) adjusting contractual responsibilities and sharing structures to meet the current trend; and 4) strengthening the competitiveness and expanding the social responsibility-based procurement systems of construction companies.