[ Quantitative Study of Human 토토 분석 사이트  ] 

 * Speaker : Dr. Jong Won Kim [School of Physics University of Sydney] 

 * Place : Physics Seminar Room (Science Bldg, 3-201) 

* Date & Time : Apr, 19 (Mon)  4:00 ~ 5:00 pm  

l  Abstract

토토 분석 사이트 is essential to maintain the physical condition of the body and probably to

consolidate memories and learning. Despite its importance, social pressure often

leads to a perception that reducing 토토 분석 사이트 is advantageous, which causes widespread

토토 분석 사이트 disorders posing public health issues. In this seminar, we review current 토토 분석 사이트

studies in clinics and discuss potential interdisciplinary collaborations between Physics

 and 토토 분석 사이트 Medicine. Examples of these collaborations are given below.

Ex.1) 토토 분석 사이트 is a very active and complex process showing many electrophysiological

changes in the brain and other organs (e.g., the heart), which causes frequent 토토 분석 사이트

 and (spontaneous) wake transitions during a nocturnal 토토 분석 사이트 period. To study these

 transitions, we propose a new approach, based on a Markov transition matrix that can

be determined by analyzing clinical 토토 분석 사이트 data (e.g., hypnograms). Our approach shows

that the statistics of 토토 분석 사이트 can be constructed via a single Markov process and that

durations of all states have modified exponential distributions, in contrast to recent reports

of a scale-free form for the wake stage and an exponential form for the 토토 분석 사이트 stage.

Ex. 2) At what point can a subject be said to be really a토토 분석 사이트, or what is the moment of the

 토토 분석 사이트 onset? These questions are potentially important for the public, especially for the

 road safety. To examine the process of the 토토 분석 사이트 onset quantitatively and explore

differences between narcoleptics and controls, we apply dynamic detrended fluctuation

 analysis to electroencephalograms recorded during multiple 토토 분석 사이트 latency tests. We find

 that electrophysiological brain activity is changing rapidly across the onset. The 토토 분석 사이트 onset

 durations of narcoleptics is significantly larger than that of controls, which suggests that the

wake state of narcolepsy being more susceptible to 토토 분석 사이트 due to a lower barrier to transitioning

 to 토토 분석 사이트. 

 Reference:

 - Kim et al., Phys. Rev. Lett. 102, 178104 (2009).

 - Kim et al., Clin. Neurophysiol. 120, 1245 (2009).           

Contact Person : Prof. Seunghwan Kim(054-279-2085, swan@postech.ac.kr )