• Korean journal of applied entomology
• /
• v.56 no.2
• /
• pp.153-164
• /
• 2017

Gene silencing using double-stranded RNA (dsRNA) has been widely used in functional genomics in biological organisms. Its principle stems from RNA interference (RNAi), a post-transcriptional control of gene expression. Suppression of specific gene expression using dsRNA may give significant lethal effect. Insect pest control exploits this molecular process to develop novel insecticides using specific dsRNAs. This review explains core principles of RNAi using dsRNA. Then it illustrates various examples to control insect pests using dsRNAs. It also discusses limitations to control insect pests using dsRNAs. Finally, it provides several breakthroughs to develop dsRNA insecticides.

• 제어로봇시스템학회:학술대회논문집
• /
• 2003.10a
• /
• pp.2045-2050
• /
• 2003

This paper describes the development of service robotic systems with the Tripodal schematic control architecture. We show practical advantages of the proposed architecture by giving examples of our experience. First, we explain how to add new task using Tripodal architecture approach. The Tripodal architecture provides some crucial organizing principles and core components that are used to build the basis for the system. Thus, the newly developed behaviors, motion algorithm, knowledge, and planning schemes are arranged so as to guarantee the efficiency of the performance of components. Second, we describe the reusability and scaleability of our architecture by introducing the implementation process of the guide robot Jinny. Most of modules developed for former robots like PSR-1 and PSR-2 systems are used directly to the Jinny system without significant modification. Experimental results clearly showed that the developed strategy is useful, even if the hardware configurations as well as software algorithms are more complex and more accumulating.

• Earthquakes and Structures
• /
• v.15 no.1
• /
• pp.81-95
• /
• 2018

Most buildings feature core walls (and shear walls) that are placed eccentrically within the building to fulfil architectural requirements. Contemporary earthquake design standards require three dimensional (3D) dynamic analysis to be undertaken to analyse the imposed seismic actions on this type of buildings. A static method of analysis is always appealing to design practitioners because results from the analysis can always be evaluated independently by manual calculation techniques for quality control purposes. However, the equivalent static analysis method (also known as the lateral load method) which involves application of an equivalent static load at a certain distance from the center of mass of the buildings can generate results that contradict with results from dynamic analysis. In this paper the Generalised Force Method of analysis has been introduced for multi-storey buildings. Algebraic expressions have been derived to provide estimates for the edge displacement ratio taking into account the effects of dynamic torsional actions. The Generalised Force Method which is based on static principles has been shown to be able to make accurate estimates of torsional actions in seismic conditions. The method is illustrated by examples of two multi-storey buildings. Importantly, the black box syndrome of a 3D dynamic analysis of the building can be circumvented.

• Proceedings of the Korean Vacuum Society Conference
• /
• 2015.08a
• /
• pp.77.1-77.1
• /
• 2015

The Center for Advanced Meta-Materials (CAMM) was launched in 2014 as a center for Global Frontier Projects supported by the Ministry of Science, ICT and Future Planning. The center is geared towards developing core technologies in controlling wave energies by incorporating creative artificial structures of sub-wavelength sizes. Furthermore, the center not only investigates novel meta-materials and devices but also builds new design, fabrication and application platforms in order to realize these technologies. The center will create new markets in various industries such as national defense, housing and medical care. In order to accomplish its goals, CAMM is composed of three major divisions: the fabrication/characterization technologies and application division, the advanced metamaterials for electromagnetic wave division and the advanced metamaterials for mechanical wave division. The center will concentrate its efforts in bringing innovations to conventional technologies in sectors such as machinery, ICT, energy and biomedical technology by adopting the use of advanced metamaterial systems. In this talk, we will introduce principles of advanced wave control and describe some advanced metamaterials which can provide new solutions for various social problems in future.

• Health Policy and Management
• /
• v.19 no.3
• /
• pp.142-165
• /
• 2009

Although providing universal coverage for health care through the National Health Insurance(NHI) is a remarkable achievement, the issue of limited benefit coverage of the NHI has been at the core of national debate over how to improve its coverage. This study aims to evaluate benefit extension strategies and implemented policies with regard to the NHI since 1989 using 'policy window theory' proposed by John W. Kingdon. Understanding problem stream, policy stream, political stream, and coupling streams regarding the NHI, in particular benefit extension, would contribute to broaden policy debates and to develop more effective strategies for the future. Historically, political stream had opened policy window in the past two decades and policy streams can be characterized by three waves. Three streams have been coupled since 2003 and the government had a strong will to fulfill better performance of NHI coverage. Study findings indicate that identification of problem structure regarding NHI benefit was not connected with policy stream tightly. In addition, there has been limited discussion on policy goal and principles for extension coverage of the NHI. Policy strategies to improve coverage of the NHI should be linked to characteristics of problem and sought solutions under the principle which is expected to be sustainable through consensus in the society.

• Journal of architectural history
• /
• v.14 no.3 s.43
• /
• pp.119-128
• /
• 2005

In ancient times, architectural design was seen as a critical task in building technologies. Specifically, form, dimension and structural design are of significant. These aspects are associated with each other and to be emerged as a whole. Designing plan dimension was deemed to be the core of design technology due to its close relationship with module system. Thus, its evolution as well as development process typically represents and reflects the spirits and contents of design technologies in ancient China. In China, the materials regarding ancient architectural technology include Yingzaofashi(營造法式) of Song Dynasty and Gongchengzuofazeli(工程做法則例) of Qing Dynasty. They show many aspects concerning materials, structure, scale system and building. In Yingzaofashi, although the length of objects are decided by 'cai(材)' and 'fen(分)', there are no regulations on length, width and height of a building. However, in the construction of ancient buildings, the above mentioned basic scales are very important in both design and construction. The present paper attempts to discuss the significance, namely, the design principles of length, with and height of ancient chinese architecture.

• Journal of the Korean Society for Precision Engineering
• /
• v.25 no.10
• /
• pp.48-57
• /
• 2008

MR Fluid, one of functional fluids, is developed for the application to automobile products. MR CDC damper using MR fluid has following principles. When ar electric current is applied to the solenoid, apparent viscosity of MR fluid passing through the annular gap which acts as magnetic circuits varies directly as the intensity of the current. These devices have a simple structure and excellent lime response characteristics, emerging as the alternatives of the conventional semi-active suspension systems. In this study, a design procedure of the magnetic circuit through the solenoid fore and the flux ring functioning as a magnetic path is investigated so as to optimize the design and performance of MR CDC dampers for the vehicles. In addition, an operating point on the B-H curve, the magnetization according to the variation in the annular gap, the pole piece width and the density of MR fluid are studied to design the optimal piston head within the restrained dimension range.

• Journal of Korean Library and Information Science Society
• /
• v.48 no.3
• /
• pp.1-20
• /
• 2017

The essential identity of public library is a local knowledge and information center that guarantees access and use of present generation and descendant. However recently the public library is being called with core space for lifelong learning, hub of cultural activities, information gateway, community center, local public goods, information commons, democracy cradle, the second living room, etc. The spectrum for the identity of the public library in Korea is not only very wide, but also is confused. The researcher who paid attention to such a reality analyzed laws and regulations, local administrative organizations, national and official statistics related public library, and suggested evidences of the identity confusion. Based on this result, researcher proposed the principles and plans to get over the identity confusion of the public library.

• Journal of the Korean Society of Food Culture
• /
• v.26 no.5
• /
• pp.437-444
• /
• 2011

This study was performed to approach the 2004 case of inferior quality mandu stuffing from the stance of food ethics. The court convicted the producers of inferior quality mandu stuffing and also decided against the plaintiffs who filed a damage suit. The core of the mandu stuffing case was not safety, but the wholesomeness. The principles of food ethics include a respect for life, justice, environmental preservation, and the priority of safety. The virtues of food professionals include wisdom, honesty, faithfulness, courage, moderation, and integrity. A food producer should possess not only the ability but also the morality to make food. The consumer should urge the producers to strengthen their morality and be conscious of responsibility and fairness. The government should organize a system to establish food ethics, and make efforts to reduce wasteful law enforcement. The media should lead public opinion toward justice by doing an unbiased and in-depth report and help establish the idea of food ethics. The necessity of food ethics and the spread of the ethical mind are the most important points of all.

• Journal of Distribution Science
• /
• v.10 no.10
• /
• pp.5-9
• /
• 2012

Purpose - The purpose of this study is to explore, examine, and analyze Journal of Distribution Science and its articles based on five key factors of journal selection process by Thompson and to provide foundations for further knowledge creation and theory building in the areas of distribution and distribution science. Research design, data, methodology - This study used an exploratory case study method to engage article analysis and reviews of Journal of Distribution Science. Thompson's five journal selection factors were used as criteria for the journal and article analyses and review. Results - Journal of Distribution Science is currently meeting or at least in the progress of meeting the following factors: timeliness of publication, international editorial convention, international diversity, and citation analysis. However, JDS is short of meeting the factor of editorial content. The research topics were not new, emerging, and/or distinctive, and they were not directly associated with specific region or country other than Korea. Conclusions - The findings from this study could lead the field of distribution to reexamine the core knowledge, to reestablish the fundamental concepts and principles, to formulate and propose academically and practically sound research methods, and to develop and focus on unique research topics in the area of distribution.