• Journal of the Korean Statistical Society
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• v.17 no.2
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• pp.121-133
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• 1988

In this paper a class of mixture designs for estimating the slope of second order Scheffe polynomial response surfaces for mixture experiments with q components is presented. The variance of the estimated directional slope at a point is a function of the direction of the slope and the design. If the variance is averaged over all possible directions in the (q-1)-dimensional simplex, the averaged variance is only a function of the point and the design. By choice of design, it is possible to make this variance constant for all points equidistant from the centroid point. This property is called "slope-rotatability over al directions in the simplex", and the necessary and sufficient conditions for mixture design to have this property are given and proved. The class of designs with this property is compared with other mixture designs and discussed.discussed.

• Computational Structural Engineering : An International Journal
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• v.1 no.1
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• pp.11-20
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• 2001

The paper describes the conceptual design, structural modelling and wind load analysis of tall buildings. The lateral stiffness of the building can be obtained economically through the interaction of core walls with peripheral frame tube and/or bundle of frame tubes and integrated design of the basement. The main structural components should be properly distributed such that the building will deflect mainly in the direction of the applied force without inducing significant response in other directions and twist. The cost effectiveness can be further enhanced through close consultation between architects and engineers at an early stage of conceptual design. Simplified structural modelling of the building and its response in three principal directions due to wind load are included. Effects of the two main structural components on the performances of a 70-story reinforced concrete building in terms of peak drift and maximum acceleration under wind load are discussed.

• Journal of the Korean Society for Library and Information Science
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• v.57 no.1
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• pp.339-363
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• 2023

In response to the changing needs of users and library services, there is a need to develop a library information science curriculum that reflects such change and to foster competent librarians. Recent studies abroad have emphasized the need for librarians who can apply design thinking methods which is a problem-solving methodology that expansively explores various alternatives and derives results, in response to recent changes and problems occurring in libraries. In this study, in order to understand how design thinking methods can be taught and to understand the perceptions of the students and librarians involved in the course, a case study is conducted of a class that applied design thinking methods and students and librarians have been interviewed who had experience participating in the class. By reflecting on the needs of students and librarians', this study explored new directions of what forms courses can take for future librarians. Based on the results of the analysis, among the different characteristics of design thinking, the value of cooperation, problem-solving ability, flexibility and iteration of design characteristics was considered as the value of a class for LIS students and librarians where design thinking methods were applied. From the findings, the research suggests future directions of creating more structured courses that involve an element of design thinking.

• Proceedings of the Korea Society of Design Studies Conference
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• 2001.10a
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• pp.15.2-15
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• 2001

• Proceedings of the Korea Society of Design Studies Conference
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• 2002.11b
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• pp.92-93
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• 2002

• Journal of Korean Library and Information Science Society
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• v.42 no.4
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• pp.181-201
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• 2011

The recent diversification of society surrounding libraries is influencing the services of libraries. This study suggested the directions of public library services from the aspect of the universal design based on the analysis of related systems and cases to provide all users with universal services in accord with the nature of public libraries amid rapidly changing social environment. This study suggests four directions: the "universal design" which is the keyword for pursuing universality of public library services; the pursuit of economic value of public library services based on the universal design; the universal design for the improvement of perception of public library services; change in policies and systems related to public library services through the application of the universal design.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2006.05a
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• pp.202-205
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• 2006

Space design is a process of solving spatial problems to create and construct all kinds of human lives. It also bestows new values to a medium to induce human perception based on the relationships between 'human and space' surrounding people. Research on user behavior has several ultimate goals including understanding both individual behavior and the relations between the user and space from a more scientific and systematic perspective, predicting various phenomena that can happen between space and humans, and reflecting the results in space design. As user behavior that's once limited within given space is going through some changes due to the introduction of digital technologies, research on user behavior in today's space design should be newly illuminated in the aspects of organic relations. Space now works as a receptor communicating with the user and responding to user behavior, and user behavior once under one-sided influences from space becomes more diverse and active. The influences of user behavior, in turn, cause changes to space itself. Thus this study set out to suggest new directions in research on user behavior based on interactions between space and the user in space design.

• Korean Journal of Optics and Photonics
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• v.20 no.6
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• pp.319-327
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• 2009

We introduce a new design technique by treating a two-group zoom lens system with a wide angle of view. First, the concept of the global optimization is introduced in the initial design stage, and from this, the global design technique is completed by analyzing and summarizing large quantities of modern design data. That is, we define the global structure function to achieve a new conceptual design technique for global optimization. And the function is put in a simple form by referring lots of patent data, manipulated with other algebraic equations, and solved finally such that we obtain the global solution region. The global solution region corresponds to the global optimization and suggests insightful systematized directions for the design of two-group zoom lens systems. These directions are attractive compared to global optimization.

• Journal of the Korean Society of Safety
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• v.29 no.4
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• pp.172-179
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• 2014

This research suggests that the regulation, design and improvement of domestic and international ambulances so that make the basis for the future ambulance in Korea. It is true that the diversification of current disasters, increasing elderly population, the increase in emergency patients, due to the lack of effective transfer system, emergency vehicle's performance problem, and the aging of ambulances cause have difficulty in providing effective emergency services in domestic country. Therefore, in order to improve the effectiveness of ambulance, the history of ambulance, other relevant provisions include international, design and directions to be improved were investigated, and also research directions of the ambulance are suggested in domestic country. In this research, suggests the following conclusions to improve domestic ambulance 1. Through standardization of the spacing and location of an ambulance is needed to maximize the treatment room. 2. The interior of the ambulance design for hygiene and infection control should be included. 3. Stretcher and equipment are designed to be fitted to each other should be standardized. 4. Especially during transfer maintain the road, noise, vibration, and shock-absorbing function to emphasize the importance. 5. The improvement of ergonomic design is necessary for the possibility of applying to many people.

• Structural Engineering and Mechanics
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• v.56 no.5
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• pp.745-765
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• 2015

This paper presents the design of reinforced concrete combined footings of trapezoidal form subjected to axial load and moments in two directions to each column using a new model to consider soil real pressure acting on the contact surface of the footing; such pressure is presented in terms of an axial load, moment around the axis "X" and moment around the axis "Y" to each column. The classical model considers an axial load and moment around the axis "X" (transverse axis) applied to each column, and when the moments in two directions are taken into account, the maximum pressure throughout the contact surface of the footing is considered the same. The main part of this research is that the proposed model considers soil real pressure and the classical model takes into account the maximum pressure, and also is considered uniform. We conclude that the proposed model is more suited to the real conditions and is more economical.