• Journal of applied mathematics & informatics
• /
• v.16 no.1_2
• /
• pp.303-306
• /
• 2004

There are 49 non-metacyclic p-groups of order less than 1000 with trivial Schur multiplier. In this paper we give a list of deficiency zero presentations for these groups.

• Bulletin of the Korean Mathematical Society
• /
• v.35 no.3
• /
• pp.465-471
• /
• 1998

The class of finite solube groups with zero deficiency known to have soluble lenght five or six is small. In this paper we exhibit some classes of such goups.

• Journal of Oriental Neuropsychiatry
• /
• v.25 no.4
• /
• pp.383-388
• /
• 2014

Objectives: Patients with dementia are increasing in Korea. So the importance of accurate diagnosis and treatment of dementia is growing. In this paper, we evaluated the result of employing the Korean medical diagnostic pattern as a tool in clinics. Methods: Patients diagnosed with Alzheimer's disease were evaluated using the Korean medical diagnostic pattern tool. Results: The number of patients with liver-kidney yin deficiency pattern/syndrome was 35. Analyzing the ratio difference between the 'liver-kidney yin deficiency' group and the 'not liver-kidney yin deficiency' group revealed that the ratio of the responses to the fourth question was less than zero. The ratio of the responses to the fifth, seventh, and eight questions were all less than 10%. The ratio of the responses to the first and second questions were greater than 30%. Conclusions: Of the six diagnostic patterns, liver-kidney yin deficiency was the greatest in the study subjects. The fourth question in the liver-kidney yin deficiency tool tests for the lack of appropriateness whereas the fifth, seventh, and eight questions test for lack of discrimination. Applying more weight to the first and second questions was an excellent choice to increase the discrimination.

• Journal of Korea Water Resources Association
• /
• v.30 no.3
• /
• pp.225-233
• /
• 1997

The nonlinear effects on the statistical properties of wave groups in terms of the average nomber of waves in a group and the mean number of waves in a high run is studied in this paper utilizing the complex envelope and total phase function, random variable transformation technique and perturbation method. It tures out that the phase distribution is modified significantly by nonlinearities and it show systematic excess of values near the mean phase and the corresponding symmetrical deficiency on both sides away from the mean. for the case of threshold crossing rate, it turns out that threshold crossing rate reaches its maxima just below the mean water level rather than zero and considerable amount of probability mass is shifted toward the larger values of water surface elevation as nonlinearity is getting profound. Furthermore, the mean waves in a high run associated with nonlinear wave are shown to have larger values than the linear counterpart. Similar trend can also be found in the average number of waves in a group.

• Clinical and Experimental Pediatrics
• /
• v.52 no.2
• /
• pp.227-233
• /
• 2009

Purpose : Growth hormone (GH) replacement after retesting is necessary because impairment of body composition and cardiovascular health has been more severe in adult patients with persistent GH deficiency (GHD) from childhood to adulthood. This study aimed to investigate the factors for persistent GHD and define a highly probable group of persistent GHD in young adults with childhood-onset GHD. Methods : GHD was reassessed by insulin tolerance test (ITT) in 55 adult patients (39 males, 16 females) with childhood-onset GHD. Twelve patients presented with idiopathic GHD and 43 patients presented with organic GHD caused by tumors involving the hypothalamus-pituitary (H-P) region (n=33), other brain tumors (n=3), meningitis (n=3), leukemia (n=2) and others (n=2). Results : Forty-nine (89.1%) of 55 patients had persistent GHD. IGF-I was positively correlated with log of peak GH (r=0.57, P<0.001). There was no difference in the proportion of persistent GHD between idiopathic and organic GHD. The percentage of patients with persistent GHD was 40%, 80%, and 95.6% for patients with zero, one, two or more additional pituitary hormone deficiencies (PHDs), respectively (P=0.002). The probability of persistent GHD was higher in patients with diseases involving the H-P region (P=0.003). GHD persisted in 15 of 18 patients treated with cranial irradiation. Conclusion : We suggest that the probability of persistent GHD in adulthood was high in patients with 2 or more additional PHDs, and diseases involving the H-P region.