• Journal of Acupuncture Research
• /
• v.21 no.5
• /
• pp.149-162
• /
• 2004

Quality assurance with high safety profile is one of the most critical issues to medical device manufacturing. In general, this issue was not paid proper attention with respect to acupuncture needle and its related devices. Acupuncture needles are manufactured through various standards ranging from purely hand-made, partially hand-made and partially machine-made, to fully machine-made mainly in China, Korea, and Japan. There is a large difference in quality between needles from different manufacturers. In order to provide a standard manufacturing guideline, it seems necessary to make a Korean Industrial standard (KS). The authors review this topic from an historical view point, investigate the current situation of the standardization of acupuncture needles in other developed countries, and inspect the general procedure to establish a KS in Korea in order to suggest a KS for acupuncture needles.

• Journal of Contemporary Eastern Asia
• /
• v.18 no.2
• /
• pp.1-8
• /
• 2019

The blockchain is still new and unfamiliar. But blockchain appears to shake an entire technology innovation system. Blockchain is rapidly drawing attention in that it will be able to fundamentally revolutionize industry ecosystem. While cryptocurrency transactions and market capitalization have been popular in mass media, several platform operators in non-cryptocurrency areas such as jewelry, social networks, and entertainment, are also moving to introduce blockchain technology in full swing. In this brief note, we intend to present integrated theoretical strands to summarize various prospects for blockchain technology. Further, we want to provide a reflection as to whether this new technology gives opportunities, challenges, or risks to future society. Particularly, we point out one of its alternative and promising adoption that gives way to new forms of decentralized and autonomous organizations (DAOs).

• Korean Journal of Child Studies
• /
• v.30 no.4
• /
• pp.191-204
• /
• 2009

The purpose of the current study was to validate the ECBQ (Early Childhood Behavior Questionnaire) scale. Data were collected from the 39 teachers of 338 18- to 36-month-old toddlers (181 boys and 157 girls) in Korea. The ECBQ scale was composed of 201 items (7-point Likert scale) with three dimensions. Reliability of this study was confirmed by Cronbach ${\alpha}$'s for ECBQ subscales ranging from .76 to .81. The results of the Exploratory Factor Analysis identified three dimensions of ECBQ : activity-non activity, extraversion-attention, negative affectivity-transformation. Results of the Confirmatory Factor Analysis supported the hierarchic model. There was a significant relationship between temperament and adjustment of infants. It was concluded that the ECBQ scale in general is acceptable for use in Korea.

• Lingua Humanitatis
• /
• v.8
• /
• pp.389-408
• /
• 2006

This paper is a philological and epistemological study of the concept of the unconscious envisaged in Saussure. The study investigates whether the unconscious in Saussure can be put to question. Most Saussurian specialists have not as of yet raised any questions on this subject. The researches were simply limited to various comparisons between Saussurian concepts with those of Freud. The paper reconstructs the very concept of the unconscious in the Course in General Linguistics, using Lacan as a mediator between Saussure and Freud. Special attention is given to the linguistic subject who is unconscious about the law of langue, which contrasts it to the conscious of other social subjects and can be observed in the semiotic change of a social system. While not suggesting a hasty comparison between Saussure and Freud the paper draws an epistemological point of convergence. In other words, the paper tries to prove that the descriptive unconsciousness operates and intervene in the paradigmatic function of langue and that the topical unconsciousness operates to the syntagmatic function.

• Structural Engineering and Mechanics
• /
• v.4 no.3
• /
• pp.209-226
• /
• 1996

One of the major divisions in the mathematical modelling of a tubular structure is to include the effect of the transverse shear stress and rotary inertia in vibration of members. During the past three decades, problems of vibration of tubular structures have been considered by some authors, and special attention has been devoted to the Timoshenko theory. There have been considerable efforts, also, to apply the method of spectral analysis to vibration of a structure with rectangular section beams. The purpose of this paper is to compare the results of the spectrally formulated finite element analyses for the Timoshenko theory with those derived from the conventional finite element method for a tubular structure. The spectrally formulated finite element starts at the same starting point as the conventional finite element formulation. However, it works in the frequency domain. Using a computer program, the proposed formulation has been extended to derive the dynamic response of a tubular structure under an impact load.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2006.05b
• /
• pp.417-420
• /
• 2006

Recently, the attention is paid to the problem of thermal crack by hydration heat according to the increase of high strength and mass concrete structures. At this point, various research has been carried out for the control of hydration heat in high strength and mass concrete. As a part of the research, it was investigated application of hydration heat reduction agent (HR) for the control of thermal crack by hydration heat in this study. To investigate the application, it was selected HR which can reduce hydration heat of concrete with effect in series I and II. Also, it was investigated the characteristics of hydration heat generation of low heat concrete using HR with binder types in seriesIII.

• Journal of Information Technology Applications and Management
• /
• v.10 no.2
• /
• pp.61-71
• /
• 2003

Ad-hoc networks are characterized by multi-hop wireless links, frequently changing network topology and the need for efficient dynamic routing protocols. In an Ad-hoc network, each host assumes the role of a router and relays packets toward final destinations Because a packet is broadcast to all neighboring nodes, the optimality criteria of wireless network routing is different from that of wired network routing. tn this paper 1 point out the more important cost factor than the number of links in the Ad-hoc network. A class routing protocols called on-demand protocols has recently found attention because of their low routing overhead since it performs a blind flooding to look for a path. In this paper, 1 propose the method which reduces overhead by using the information of neighboring nodes and doing a selective flooding. Simulation results demonstrate better reduction of routing overheads with this scheme.

• Korean Journal of Oriental Medicine
• /
• v.15 no.1
• /
• pp.23-29
• /
• 2009

The value of Dongeuibogam has been officially acknowledged as a Memory of the World. However, we should not overlook the forward-looking value of Dongeuibogam in addition to its backward-looking value. For the past 200 years, Western medicine has attained great achievements in therapeutic medicine based on Descartes' mind-body dualism, which focuses on the body as a separate entity from the mind. Recently, Western medicine modified its previously one-sided track into a new orientation towards holistic mind-body medicine in recognition of the two as an organic whole. At this point in time, it is essential to draw attention to the forward-looking value of Dongeuibogam, which pioneered mind-body medicine based on the medicinal philosophy of Jing Qi Shen more than 400 years ago.

• Journal of the Korean Ceramic Society
• /
• v.28 no.2
• /
• pp.167-175
• /
• 1991

In synthesizing hydrated zirconia powder by hydrolysis of Zr-alkoxides using ethanol as mutual solvent, three experimental parameters, namely, concentration of alkoxides and hydrolysis water and addition rate of hydrolysis water were varied systematically. Spherical, monodispersed, nonagglomerated and submicrometer sized powders were prepared at 0.3 M of Zr(n-OPr)4 and 0.05M of Zr(n-OBu)4 with wide ranges of hydrolysis water conditions i.e. 0.5-2.0M concentration and 1-20ml/min addition rate. During the hydrolsis, careful attention have to be paid to maintain homogeneous reaction by controlling the agitation of the reactant and the addition of the hydrolysis water. For more improved condition of monodispersity it was found that the key point is to shorten the self-nucleation time within several seconds as rapid as possible. In both alkoxides system, with higher concentration of alkoxide and hydrolysis water and with slow addition rate of hydrolysis water, hydrated zirconia powders synthesized showed tendency to fall in worse powder conditions.

• Journal of Environmental Science International
• /
• v.15 no.5
• /
• pp.493-501
• /
• 2006

The increase in environmental loads and energy consumptions has resulted in the need of developed new forms of energy for a sustainable use for the society. Recently, the viability of using unused energy has attracted a great deal of attention. From the view point of using unused energy, the most critical problem can be referred to as the distance between the heat source/sink and heat demand area. The water resource in the city water system was used to solve this distance problem with unused energy. The calculation method of the potential use unit was used to survey the potential of the water resource in the city water system. The amount of theoretical unused energy and energy savings in the model city were estimated using this method. It is estimated that the amounts of energy savings and $CO_2$ reduction correspond to 131.3 GWh and 29280[t-C], respectively, per annual basis.