• Journal of KSNVE
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• v.7 no.2
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• pp.255-260
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• 1997

This paper describes 3-dimensional volume array of 4 microphones including a reference microphone which is capable of imaging wideband noise source position in 2-dimensional image plane. The cross correlation function and corresponding imaging function between a reference microphone and other microphone, are derived as a function of noise source position. The magnitude of the imaging function gives noise source mapping in image plane. Since the image plane is selective from a rectangular and a cylindrical plane, noise source position information such as range and bearing relative to the array is identified very much easily. Simulation results for typical source configurations confirms the applicability of the proposed array in noise control field.

• Journal of Korean Public Health Nursing
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• v.19 no.2
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• pp.274-283
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• 2005

Purpose: To survey the functional status, self-esteem and depression of a community of indwelling clients with total laryngectomy, and to evaluate the correlation among these three variances. Methods: From May 2002 to October 2002, 76 clients who had undergone total laryngectomy more than three months ago were surveyed with using Baker's functional status in head & neck cancer-self report, Rosenberg's self rating self-esteem scale and Zung's self rating depression scale. Results: 1. The functionaI status score was $48.67{\pm}10.12$. The subjects aged 70 years or older had significantly higher scores than the subjects aged $50{\sim}59$ years. The group of clients who were operated on more than five years ago showed higher scores than the patients operated on within a year. 2. The self-esteem score was $30.47{\pm}6.44$. 3. The depression score was $47.26{\pm}8.01$. The subjects who bad three family members and the subjects who had five family members had significantly higher scores than the subjects who had two family members. 4. A significant correlation found between the functional status and self-esteem. Significant negative correlations were found between the functional status and depression and also between self-esteem and depression. Conclusion: Remarkable correlations were observed among functional status, self-esteem and depression. Nurses should consider the status of layngectomy patients and pay more attention to their pre- and post- operative nursing care and rehabilitation.

• Proceedings of the KSMRM Conference
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• 2001.11a
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• pp.111-111
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• 2001

목적： To evaluate the feasibility of the event-related functional MR study using power grip studying the hand motor system 대상 및 방법： Event-related functional MRI was performed on a 1.5T MR unit in seven norm volunteers (man=7, right-handedness=2, left-handedness=5, mean age： 25 years). A single-shot GRE-EPI sequence (TR/TE/flip angle： 1000ms/40ms/90, FOV = 240 mm matrix= 64$\times$64, slice thickness/gap = 5mm/0mm, 7 true axial slices) was used for functiona MR images. A flow-sensitive conventional gradient echo sequence (TR/TE/flip angl 50ms/4ms/60) was used for high-resolution anatomical images. To minimize the gross hea motion, neck-holders (MJ-200, USA) were used. A series of MR images were obtained in axial planes covering motor areas. To exclude motion-corrupted images, all MR images wer surveyed in a movie procedure and evaluated using the estimation of center of mass of ima signal intensities. Power grip task consisted of the powerful grip of all right fingers and hand movement ta used very fast right finger tapping at a speed of 3 per 1 second. All tasks were visual-guid by LCD projector (SHARP, Japan). Two tasks consisted of 134 phases including 7 activatio and 8 rest periods. Active stimulations were performed during 2 seconds and rest period were 15 seconds and total scan time per one task was 2 min 14 sec. Statistical maps we obtained using cross-correlation method. Reference vector was time-shifted by 4 seconds an Gaussian convolution with a FWHM of 4 seconds was applied to it. The threshold in p val for the activation sites was set to be 0.001. All mapping procedures were peformed usin homemade program an IDL (Research Systems Inc., USA) platform. We evaluated the activation patterns of the motor system of power grip compared to hand movement in t event-related functional MRI.