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Nicotiana tabacum과 N. glutinosa 간 융합식물체의 염색체 분석
김준철 강원대학교 기초과학연구소 2007 기초과학연구 Vol.18 No.-
Fusion product lines which had an intermediate froral and leaf morphology when compared to the parents of Nicotiana tabacum (NR?/SR?) and N. glutinosa were conformed as a somatic hybrid bases on the chromosome analysis. The hybrid lines, L22, L31 and L33 gave a chromosome count of 2n=66, 2n=64 and 2n=68 respectively, which were less than the expected number, 2n=72.
Current Trends in the Management of Post-Prostatectomy Incontinence
김준철,조강준 대한비뇨의학회 2012 Investigative and Clinical Urology Vol.53 No.8
One of the annoying complications of radical prostatectomy is urinary incontinence. Post-prostatectomy incontinence (PPI) causes a significant impact on the patient’s health-related quality of life. Although PPI is stress urinary incontinence caused by intrinsic sphincter deficiency in most cases, bladder dysfunction and vesicourethral anastomotic stenosis can induce urine leakage also. Exact clinical assessments, such as a voiding diary, incontinence questionnaire, pad test, urodynamic study, and urethrocystoscopy, are necessary to determine adequate treatment. The initial management of PPI is conservative treatment including lifestyle interventions, pelvic floor muscle training with or without biofeedback, and bladder training. An early start of conservative treatment is recommended during the first year. If the conservative treatment fails, surgical treatment is recommended. Surgical treatment of stress urinary incontinence after radical prostatectomy can be divided into minimally invasive and invasive treatments. Minimally invasive treatment includes injection of urethral bulking agents, male suburethral sling, and adjustable continence balloons. Invasive treatment includes artificial urinary sphincter implantation, which is still the gold standard and the most effective treatment of PPI. However, the demand for minimally invasive treatment is increasing, and many urologists consider male suburethral slings to be an acceptable treatment for PPI. The male sling is usually recommended for patients with persistent mild or moderate incontinence. It is necessary to improve our understanding of the pathophysiologic mechanisms of PPI and to compare different procedures for the development of new and potentially better treatment options.
Alteration of Autonomic Function in Female Urinary Incontinence
김준철,주관중,김진태,최종보,조대성,Yong-Yeun Won 대한배뇨장애요실금학회 2010 International Neurourology Journal Vol.14 No.4
Purpose: Stress urinary incontinence (SUI) and urge urinary incontinence (UUI) have different mechanisms of action. We believe that alteration of autonomic nervous system (ANS) activity may contribute to UUI because the lower urinary tract is regulated through the sympathetic and parasympathetic nervous systems. Heart rate variability (HRV) allows measurement of autonomic nervous function, therefore we measured and compared HRV parameters in women with urinary incontinence. Methods: From March 2008 to March 2010, we evaluated all patients who visited 2 university hospitals for treatment of urinary incontinence. Theywere performed 3-day voiding diary, urodynamic study, physical examination and routine laboratory examination. We excluded subjects who had diabetes, cardiovascular problems, or other condition that affect ANS. Patients with mixed urinary incontinence (MUI) were also excluded. Finally 47 women with SUI (group 1) and 29 women with UUI (group 2) were enrolled according to their symptoms and voiding diary. We compared their HRV parameters. And excluding 11 patients who had detrusor underactivity, we divided them again into group A, 53 women without detrusor overactivity (DO) and group B, 12 women with DO. We compared HRV parameters between DO and non-DO group. Results: Older women had a higher incidence of UUI and DO. In HRV parameters, only the ratio of low frequency (LF) and high frequency (HF) was significantly higher in group 2 than group 1 (3.5±3.6 vs. 1.6±1.1, P<0.05). Also group A had higher mean LF/HF ratio than group B (4.3±3.8 vs. 1.9±1.9, P<0.05). Conclusions: Increased LF/HF values indicate relative sympathetic hyperactivity over parasympathetic activity. Changes in ANS activity could indicate the presence of UUI and potentially DO.
김준철,이준환 대한전자공학회 1994 전자공학회논문지-B Vol.b31 No.3
For the analysis of textured image, it requires large storage space and computation time to calculate the matrix features such as SGLDM(Spatial Gray Level Dependence Matrix). NGLDM(Neighboring Gray Level Dependence Matrix). NSGLDM(Neighboring Spatial Gray Level Dependence Matrix) and GLRLM(Gray Level Run Length Matrix). In spite of a large amount of information that each matrix contains, a set of several correlated scalar features calculated from the matrix is not sufficient to approximate it. In this paper, we propose a new classifier for textured images based on these matrices in which the projected vectors of each matrix on the meaningful directions are used as features. In the proposed method, an unknown image is classified to the class of a known image that gives the maximum similarity between the projected model vector from the known image and the vector from the unknown image. In the experiment to classify images of agricultural products, the proposed method shows good performance as much as 85-95% of correct classification ratio.