• Journal of the Korean Statistical Society
• /
• 제25권3호
• /
• pp.393-406
• /
• 1996

We obtain the general moment of non-central Wishart distribu-tion, using the J-th moment of a matrix quadratic form and the 2J-th moment of the matrix normal distribution. As an example, the second moment and kurtosis of non-central Wishart distribution are also investigated.

• 호남수학학술지
• /
• 제33권4호
• /
• pp.557-573
• /
• 2011

Let G be a compact and connected semisimple Lie group, H a closed subgroup, g (resp. h) the Lie algebra of G (resp. H), B the Killing form of g, g the normal metric on the homogeneous space G/H which is induced by -B. Let D be an invarint connection with Weyl structure (D, g, ${\omega}$) in the tangent bundle over the normal homogeneous Riemannian manifold (G/H, g) which is projectively flat. Then, the affine connection D on (G/H, g) is a Yang-Mills connection if and only if D is the Levi-Civita connection on (G/H, g).

• Advances in aircraft and spacecraft science
• /
• 제5권6호
• /
• pp.615-632
• /
• 2018

Mechanical buckling of a rectangular functionally graded plate is obtained in the current paper using a refined higher-order shear and normal deformation theory. The impact of transverse normal strain is considered. The material properties are microscopically inhomogeneous and vary continuously based on a power law form in spatial direction. Navier's procedure is applied to examine the mechanical buckling behavior of a simply supported FG plate. The mechanical critical buckling subjected to uniaxial and biaxial compression loads are determined. The numerical investigation are compared with the numerical results in the literature. The influences of geometric parameters, power law index and different loading conditions on the critical buckling are studied.

• Journal of applied mathematics & informatics
• /
• 제11권1_2호
• /
• pp.59-80
• /
• 2003

An incomplete factorization method for preconditioning symmetric positive definite matrices is introduced to solve normal equations. The normal equations are form to solve linear least squares problems. The procedure is based on a block incomplete Cholesky factorization and a multilevel recursive strategy with an approximate Schur complement matrix formed implicitly. A diagonal perturbation strategy is implemented to enhance factorization robustness. The factors obtained are used as a preconditioner for the conjugate gradient method. Numerical experiments are used to show the robustness and efficiency of this preconditioning technique, and to compare it with two other preconditioners.

• 한국의류학회지
• /
• 제23권2호
• /
• pp.242-249
• /
• 1999

The purpose of this study was to investigate two different kinds of socks on physiological responses at an ambient temperature of 35$\pm$1$^{\circ}C$ and relative humidity of 50$\pm$5% Five healthy women wearing normal socks or toes socks participated as the subjects. Rectal temperature skin temperatures sweat rate blood pressure pulse rate and questionnaire wee measured. Rectal temperature skin temperature sweat rate blood pressure pulse rate and questionnaire were measured. Rectal temperature and mean skin temperature were lower after exercise at wearing toes socks . Sweat rate was higher at wearing normal socks and blood pressure and pulse rate were tend to higher at wearing toes socks. Thermal comfort temperature sensation and humidity sensation were better wearing toes socks. Thermal comfort temperature sensation and humidity sensation were better wearing toes socks than wearing normal socks but wearing comfort was better at wearing normal socks. These results will be discussed form the viewpoint of thermoregulation AVA(Arterio venous Anastomosis) and count current heat exchange.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
• /
• pp.773-776
• /
• 2003

This paper presents new hardware implementation of the ECC(Elliptic Curve Cryptography) algorithm that is improved in speed and stability. We proposed new datapath that changed square's position so that we can reduce required number of cycles for addition operation between two points by more than 30%. We used Massey-Omura parallel multiplier adopted Normal basis for fast scalar multiplications. Also the use of the window non-adjacent form (WNAF) method can reduce addition operation of each other different points. We implemented ECC system with GF($2^{196}$), and this system was designed and verified by VHDL.

• 대한약학회:학술대회논문집
• /
• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
• /
• pp.213.3-213.3
• /
• 2003

Osteoporosis is the most common form of metabolic bone disease and is an important cause of morbidity and mortality in the elderly and especially in postmenopausal women. The possible beneficial action of essential fatty acids and their metabolites both in the prevention and treatment of osteoporosis needs attention. Therefore in this study, fatty acid levels of the normal groups was compared with those of patients. And then star symbol plots were drawn based on the fatty acids values of patients normalized to the corresponding normal group values to transform into visual patterns discriminating from the normal pattern. (omitted)

• Advances in concrete construction
• /
• 제15권5호
• /
• pp.313-319
• /
• 2023

In this paper, the analytic solution has been found by using truncation approach. With the help of suitable substitution, different physical parameters are yielded in their non-dimensional form. The governing boundary layer partial differential equations are reduced to a set of ordinary ones by using appropriate similarity transformations. The velocity profile across the domain have also been taken into account. The effect normal velocity profiles buoyancy parameter, slip parameter, shrinking parameter, Casson fluid parameter on the heat profile. It is found that the normal velocity profiles rise with the buoyancy parameter and for the slip parameter. It is observed that the normal velocity profile decreases with the increase of shrinking parameter. The reverse behiour is found for the Casson fluid parameter. The results are numerically computed, analyzed and discussed. For the efficiency of present model, the results are compared with earlier investigations.

• 대한감각통합치료학회지
• /
• 제11권2호
• /
• pp.41-56
• /
• 2013

목적 : 본 연구의 목적은 국내 외 감각통합기능의 실행능력을 측정하는 평가도구에 대한 체계적 고찰을 통해 정상아동의 수행 평균이나 범위를 제시하고자 하였다. 연구방법 : Medline, PubMed, Ovid, Eric, 국회도서관, 국가과학기술정보센터, Kiss(한국학술정보), RISS(학술연구정보서비스), 구글 검색 엔진을 이용하여 감각통합이론의 틀을 바탕으로 한 실행능력 평가도구명을 검색하였다. 대상논문은 2000년 1월부터 2011년 4월까지 출판된 학위논문, 학회지, 저널이었다. 결과 : 총 24개의 논문이 검색되었고, 사용된 평가도구는 Bruinink-Oseretsky Test of Motor Proficiency (BOTMP), Bruininks-Oseretsky Test of Motor Proficiency, Short Form (BOT-SF), Bruininks-Oseretsky Test of Motor Proficiency, Second Edition (BOT-2), Bruininks-Oseretsky Test of Motor Proficiency, Second Edition, Short Form (BOT-2-SF), Clinical Observations of Motor and Postural Skills (COMPS), Motor Assessment Battery for Children (MABC), Clinical Test of Sensory Interaction with Balance (CTSIB), Sensory Integration and Praxis Test (SIPT) 소항목이었다. BOTMP-SF에서 그리스와 미국아동의 수행을 비교한 결과, '달리기 속도 및 민첩성', '카드분류하기', '점찍기' 항목에서 큰 수행의 차이를 보였다. BOT-2의 한국아동의 수행결과는 8개 소항목에서 모두 평균과 평균이상의 결과를 보였으며 BOT-2-SF의 인도아동의 수행결과는 연령이 증가할수록 모든 항목의 수행도가 높아짐을 보였다. 영국, 캐나다, 한국 아동이 수행한 COMPS에서는 세 나라 평균이 모두 정상범주에 있었고 특히, 한국아동의 평균 수행점수가 캐나다 아동에 비해 높았다. 결론 : 본 연구에서 제시하는 국내 외 정상 아동의 수행 결과는 임상의 평가 대상이 되는 장애아동의 실행능력 수행을 비교하는데 기준을 제시할 것이다.

• 대한조선학회지
• /
• 제6권1호
• /
• pp.25-34
• /
• 1969

From viewpoints of over-all ship economy the straight framed V-bottom hull forms with chines are considered to be attractive even for usual commercial vessels, because increments of resistance over that of round hull forms, if any, can be well compensated with reduction in construction cost.[1] To investigate the influences of both prismatic coefficient and chine elevation on resistance performance, three models of straight-framed V-bottom hull forms which are similar to Prof. C. Ridgely-Nevitt's W-18, W-8, and W-20[2],[3] in size and hull form coefficients were tested at the SNU Ship Model Towing Tank for resistance measurements. They are of Cp=0.60, 0.65 and 0.70 and of ${\Delta}/(0.01L)^3=300$. Influence of variation of chine elevation on resistance performance were observed with the test results obtained at normal condition, and at the trimed by the stern by 2% and 4% of $L_{bp}$ at normal condition under same displacement. The hull form characteristics are shown in Table 1, and in Fig. 1, 2, 3, 4 and 5. The test results are shown in Fig 8, 9 and 10 in the form of Cr vs. $V/\sqrt{L}$ curves taking Cp as a parameter for normal condition, trim by the stern in 2% and 4% $L_{bp}$ at normal condition , respectively. Cr vs. $V/\sqrt{L}$ curves taking trim condition as a parameter are also shown in Fig 11, 12 and 13 for Cp=0.60 and 0.70, respectively. The best and the worst trim condition at given $V/\sqrt{L}$ in viewpoint of Cr are plotted for each Cp-value as shown in Fig 14, 15 and 16. From the above results the following conclusions are derived: (1) In general, the resistance performance of the straight-framed V-bottom hull forms are not inferior to those of round hull forms. At a certain range of $V/\sqrt{L}$ the former gives less resistance than the latter. (2) Regarding influences of Cp on Cr, it is observed that, at $V/\sqrt{L}$ less than about 0.925, the greater Cp-value gives the more increment of Cr, and that, at $V/\sqrt{L}$ greater than about 0.925 the smaller Cp-value gives the more increment of Cr. It is also noteworthy that the model of Cp=0.70 has remarkable hump on Cr vs. $V/\sqrt{L}$ curve between $V/\sqrt{L}=0.80$ and 0.90. (3) For higher speed within the test range, the chine elevation having the steeper slope around bow and the easier slope around amidship and stern, refered to watering, give the better results in resistance performance. (4) Assuming the chine elevations adopted for the tested models were not of the best, we would expect further improvement of resistance performance for such form. Hence, a systematic study on chine elevation is very disirable to prepare design data of general purpose for the such hull forms.