• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
• /
• v.21 no.2
• /
• pp.101-104
• /
• 2010

The origin and growth of laryngology is inseparably linked to the development of endoscopic surgery of the larynx. Phonomicrosurgery is a means of maximally preserving the layered microstructure of the vocal fold, that is, the epithelium and lamina propria. Phonomicrosurgery has developed from convergence of micro laryngoscopic surgical technique theory and the mucosal wave theory of laryngeal sound production. Improvements in technology (i.e., laryngoscopes, handled instruments, and lasers), which in part arise from developments in more frequently performed minimally invasive surgical procedures, will probably facilitate the next generation of procedural innovations. The best methods of optimizing phonosurgical outcomes include making an accurate diagnosis, completing a comprehensive voice evaluation, providing sufficient preoperative therapy, carefully selecting patients to undergo phonomicrosurgical procedures, and requiring sufficient postoperative rest and therapy. Phonomicrosurgery will continue to evolve as a result of the interdependent collaboration of surgeons with voice scientists, speech pathologist, and other voice professionals.

• 제어로봇시스템학회:학술대회논문집
• /
• 2000.10a
• /
• pp.468-468
• /
• 2000

In our laboratory, the control aspects are investigated in the photovoltaic power generation systems (PV systems). The PV system is very good for earth environment, but if it connects to power network system, many problems are raised (protection, voltage, harmonics etc.). In this paper, we present the result of the basic studies for the building of the PV system that amplifies the electric energy obtained from the solar cell. We consider electronic circuits in order to protect the PV system from power surge induced by lightning and also design an electronic circuit in order to detect defaults in the power network system. We would like to integrate these circuits into the PV system by considering its control equipment build by 8-bit microcomputer using various control theory (fuzzy, neural network etc.).

• Proceedings of the Acoustical Society of Korea Conference
• /
• 1993.06a
• /
• pp.190-194
• /
• 1993

In the ocean bubble layers play a significant role in the sound propagation as well as sound generation. Most of early works dealt with acoustic properties of the bubble layers with sharp flat boundaries. Bubble layers with sharp flat boundaries. Bubble layers with transition sublayers are more likely in the coean. In this paper a theory of sound propagation through plane bubble layers with transition sublayers at both borders was developed. It shows that the reflection and transmission coefficients depend on the thickness of transition sublayers. The theory with thicker transition sublayers shows weaker resonance properties of bubble layer. It gives better presentation for the peculiar behavior of the experimental data than that with sharp flat boundaries.

• Proceedings of the Korean Geotechical Society Conference
• /
• 2000.11a
• /
• pp.689-694
• /
• 2000

The traditional concept after Terzaghi was that consolidation was the dissipation process of pore water pressure compatible to external loading which was generated immediately after the loading. However, a theory of one-dimensional consolidation based on elasto-viscous liquid model proposed by Yoshikuni(1994) explained that the process of primary and secondary consolidation was considered to be not a simple process of dissipation of pore water pressure but a simultaneous process of dissipation and generation by external loading. This study attempts to demonstrate general consolidation behaviour of clayey soils including effects of consolidation history, load increment and thickness of cohesive layer by one-dimensional Finite Difference Method(F.D.M) analysis from the viewpoint of elasto-viscous consolidation theory.

• The Journal of Korean Medical History
• /
• v.24 no.2
• /
• pp.87-104
• /
• 2011

Relationship between medicine and iching is what has been followed to be inherited from the period of generation in iching. This writing examined the Thought of the Relation between Medicine and I- ching in Donguibogam. Donguibogam implies the thought that the principles in medicine and iching are same, and is the thought that is broadly spread in Donguibogam. Donguibogam is very rich in yi-yi-study(醫易學)-based contents, which are involved in research subjects of the relation between medicine and iching such as the theory of Taiji(太極) ba gua(八卦), the thought of human and nature, the thought of Yin and Yang, and sign system of gua(卦), and the theory of Image and Number.

• The Transactions of the Korean Institute of Electrical Engineers A
• /
• v.55 no.6
• /
• pp.259-264
• /
• 2006

This paper addresses the collusive bidding that functions as a potential obstacle to a fully competitive wholesale electricity market. Cooperative game is formulated and the equation of its Nash Equilibrium (NE) is derived on the basis of the supply function model. Gencos' willingness to selectively collude is expressed through a bargain theory. A Collusion Incentive Index(CII) for representing the willingness is defined through computing the Gencos' profits at NE. In order to keep the market non-cooperative, the market operator has to know the highest potentially collusive combination among the Gencos. Another index, which will be called the Collusion Monitoring Index(CMI), is suggested to detect the highest potential collusion and it is calculated using the marginal cost functions of the Gencos without any computation of NE. The effectiveness of CMI for detecting the highest potential collusion is verified through application on many test market cases.

• Proceedings of the KIEE Conference
• /
• 1992.07a
• /
• pp.93-95
• /
• 1992

A planner have to consider many uncertain factors in best generation mix problem. To solve those problems, fuzzy theory is applied in this paper. Using fuzzy measure and Sugeno's fuzzy integral, the planner can choose the best alternative. By applying the proposed algorithm to KEPCO data, the validity of the proposed method is verified.

• Journal of Ocean Engineering and Technology
• /
• v.20 no.4 s.71
• /
• pp.64-69
• /
• 2006

A numerical analysis is made to investigate the wave absorption efficiency of a OWC-type wave power generator. Energy absorption by an OWC(Oscillating Water Column) air-chamber is computed in regular waves, taking account of the oscillating surface-pressure, due to pressure drop, across the duct of the air chamber. The problem is formulated in the scope of potential theory and solved by the Localized Finite Element Method(LFEM), based on the classical variational principle. The efficiency of energy absorption is investigated by. changing wave conditions, sea-bottom slope and pressure drop coefficient.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.57 no.5
• /
• pp.735-740
• /
• 2008

Recently, the research of PM (Preventive Maintenance) method on the RCM(Reliability-Centered Maintenance) of the system equipment is being actively advanced for a few years. For the most of the current power equipment maintenance, the state of the equipment after maintenance is assumed to be becoming 'as good as new ones' state. However, the state of the power equipment is maintained like the states of the between 'as good as new ones' and 'as bad as old ones' by imperfect maintenance that implies the life decrease of the equipment by frequent breakdown, the error of maintenance process, and so on. So, the Maintenance method considering the real case has to reflect Imperfect maintenance than perfect maintenance. This paper suggests the Preventive Maintenance method by using Quasi - Renewal Theory for the gas turbine equipment as deliberating the imperfect maintenance for the real cases.

• Journal of Haehwa Medicine
• /
• v.9 no.1
• /
• pp.183-192
• /
• 2000

1. The emotion is given before birth, and because of not perfect of human being's consciseness, individual differance exist. 2. Every emotion act first on the heart and following other organ which possess each of the five emotion. Therfore the heart plays impartant role on the emotion and emerge five organ in the oriental medicine theory. 3. The emotion was expressed by external reagent, but the more importante reagent is internal situation such as qi(氣), xie(血), yin(陰), yang(陽), according to these reagent the existing time and strength is different. 4. The emotion is different according to the weak-strong and big-small of zang-fu(臟腑), and the size of zang-fu(臟腑) is determined by emotional specificity in the si-xiang medicinal (四象醫學)theory.