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한국 정신장애의 역학 조사 연구[I] : 각 정신장애의 유병률
조맹제,함봉진,김장규,박강규,정은기,서동우,김선욱,조성진,이준영,홍진표,최용성,박종익,이동우,이기철,배재남,신정호,정인원,박종한,배안,이충경 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4
Objectives : This study aims to estimate the prevalence of the DSM-IV psychiatric disorders in Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI). Methods : Subjects were selected by taking multi-stage, cluster samples of 7,867 adult household residents, 18 to 64 years of age, in ten catchment areas. Total 78 trained interviewers administered the K-CIDI to the selected respondents, from June 1 to November30,2001. Results : Total 6,275 respondents completed the interview. Some 33.5% of respondents reported at least one lifetime disorder, 20.6% reported at least one-year disorder, and 16.7% reported at least one-month disorder. The most common lifetime disorders were alcohol abuse/dependence (17.24%), nicotine dependence/withdrawal (11.19%), specific phobia (5.16%), and major de-pressive disorder (4.25%). The lifetime prevalence of substance abuse/dependence (0.25%) and schizophrenia (0.16%) was very low. Nicotine and alcohol use disorder showed very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among female than male. Conclusion : The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in distributions of psychiatric disorders across the areas and times were observed.
신경회로망 제어기를 이용한 PID 파라미터 추정에 관한 연구
權重東,裵銀敬,金恩基,全基英,李承桓,吳鳳煥,李勳九,金容珠,韓慶熙 明知大學校 産業技術硏究所 2006 産業技術硏究所論文集 Vol.25 No.-
In this paper, supposed to solve these problem to PID parameters controller algorithm using ANN. In the proposed algorithm, the parameters of the controller were adjusted to reduce by on-line system the error of the speed of IM. In this process, EBPA NN was constituted to an output error value of an IM and conspired an input and output. The performance of the self-tuning controller is compared with that of the PH) controller tuned by conventional method (Ziehler-Nichols). The effectiveness of the proposed control method is verified thought the Matlab Simulink and experimental results.
박선홍,노용훈,이도용,나한조,김용기,최봉남,도남용 朝鮮大學校 附設 醫學硏究所 1996 The Medical Journal of Chosun University Vol.21 No.1
We have usually experienced bone conduction impairment in chronic otitis media, but it is unclear that raised bone conduction threshold is due to the reflection of cochlear dam- age and / or Carhart effect ( an artificial elevation of bone conduction threshold due to conductive defect ) or both. The purpose of this study is to verify the influence of the artificial elevation of the bone conduction threshold in chronic otitis media and to estimate Carhart effect. A total of 336 cases of tympanoplasty with unilateral chronic otitis media without any other causes of sensorineural hearing loss was studied. The average threshold levels of the bone conduction in diseased ears ranged from 18.5dB at 4kHz to 12.1dB at 250Hz The longer duration of the disease, the larger perforation size, the more severe damage of the middle ear structure and the presence of the cholesteatoma made bone conduction threshold increased. The postoperative thresholds of bone conduction were Improved in 36 cases (40.4%) of the 89 cases that underwent operation with type I tympanoplasty technique without electrie drilling. The degree of the maximal improvement was 14.3dB at 2000Hz and the minimum was 8.8dB at 250Hz. but these result did differ from a statistically significant degree. The result suggest that the bone conduction threshold in chronic otitis media is elevated artificially by conductive defect and improved by successful reconstructive surgery.
Gi-Bong Han,Cheol-Woong Kim,Jong-Woong Park,Dae-Gu Son 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Even though the microvascular anastomosis was generalized and showed the clinical good results, the development of the microvascular anastomosis is much slower rather than the other medical instruments and its underdevelopment is over 30 years. The reason of this underdevelopment is the strong conservatism not to yield the previous suture anastomosis if the reliability of the newly introduced anastomosis was not secured perfectly even though the related specialists use it easily. Therefore, for this study the problem of the mechanical anastomosis device with the ring pin, which relies on the 100% import, was improved and the mechanical characteristics of the advanced anastomosis device was suggested. To overcome this shortness of the conventional microvascular anastomosis device, the mechanical microvascular anastomosis coupler has been developed and its details have been designed. The moving of the microvascular anastomosis coupler in the blood vessel with 0.5㎜~1㎜ diameter should be minimized rather than that of the big blood vessels and the corresponding elements have to be the minimum. the above results, it is believed that the mechanical microvascular anastomosis is the good microvascular anastomosis to replace the conventional suture one.
Development of Quick and Compact Design Micro-vascular Anastomotic Coupler
Gi-Bong Han,Cheol-Woong Kim,Jong-Woong Park,Dae-Gu Son,Dong-Joon Oh 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The most important technique of a microvascular anastomosis is for the previous state of the blood flow to be recovered after the cutted vascular tracts are rejoined. The resolution of the microscope for the operation is variable from 6 times to 40 times and can be controlled. The previous suture microvascular anastomosis, which is being operated at the resolution of 40 times, requires for the high accuracy, the advanced operating technique and the long operating time. Nevertheless, the previous Suture Microvascular anastomosis has the many problems. The mechanical anastomotic was tried for the comparatively great blood vessels at the beginning and it could divide into two methods. The improved microvascular anastomosis device was developed using the above ring pin and was applied for the patent. For this study, 1) the mechanical design of our developed microvascular anastomosis device was introduced and 2) comparing with the previous device, the improved mechanism was explained.
하지강성 가변 인공건 액추에이터(Leg Stiffness controllable Artificial Tendon Actuator, LeSATA™)의 개발
한기봉(Gi-Bong Han),어은경(Eun-Kyung Eo),지대원(Dae-Won Jee),양영규(Young-Gyu Yang),김철웅(Cheol-Woong Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
If we can design a knee actuating mechanism as a primary actuator for supporting knee extension, it might be possible to revolutionarily store or release elastic strain energy, which is consumed during the gait cycle, and as a result leg stiffness is expected to increase. In this case, it is necessary to design an ankle actuating mechanism as a secondary actuator which will adjusted excessive artificial leg stiffness from the primary actuator by reserving or releasing the elastic strain energy, because the energy, which is a part of kinetic and potential energy generated by human walking and is temporarily reserved in collision phase, will be discharged in rebound phase of elastic recoil. Dissimilar to previous study, we assumed that the leg stiffness could be increased by controlling walking speed with relative angular velocity of two segments and accordingly we are currently developing a knee-ankle two actuator system. As mentioned above, however, the artificial knee actuating will generate a new compensatory mechanism in the ankle part. It suggests that excessive leg stiffness caused by the artificial knee actuating will lead to a stumbling gait in abnormal collision phase accompanied by foot touch-down. Therefore, in designing the actuators we also considered the increase in walking speed and stumbling from repetitive acceleration in swing phase of previous gait cycles, satisfying the conditions with regard to relative angular velocity of two segments, thigh and shank, in order to raise leg stiffness. Furthermore, it might be difficult to confirm the effectiveness of the actuators if kinematic energy from unnecessary human walking is released under artificial deceleration control, which was designed to prevent an increase in walking speed. Therefore, we believed that the solution for the compensatory mechanism in ankle joint would be conversely derived by confirming the effect of changes in metatarsophalangeal joint tilt angle and walking speed on knee movement. Accordingly, we invented a new generation leg stiffness actuator in order to avoid the stumbling gait from the ankle joint compensatory mechanism caused by leg stiffness. The trademark of the device is called Leg Stiffness Artificial Tendon Actuator (LeSATA™). The stiffness between two springs could be variably controlled by adding eccentric mass inside the actuator, LeSATA. We also verify the functionality of the actuator which will automatically transfer between walking and running mode by actively monitoring any changes in gait pattern of LeSATA™ and in relative angular velocity between thigh and shank.