Zobrazeno 1 - 10
of 18
pro vyhledávání: '"David C Barnes"'
Publikováno v:
Canadian Journal of Gastroenterology, Vol 20, Iss 8, Pp 521-526 (2006)
BACKGROUND: The Cockcroft-Gault formula (CGF) is used to estimate the glomerular filtration rate (GFR) based on serum creatinine (Cr) levels, age and sex. A new formula developed by the Modification of Diet in Renal Disease (MDRD) Study Group, based
Externí odkaz:
https://doaj.org/article/b25a077907224cf9898f6ec843c121d3
Autor:
Roger Knobel, David C. Barnes
Publikováno v:
SIAM Journal on Mathematical Analysis. 26:616-632
This work is concerned with the inverse eigenvalue problem for the partial differential equation $\nabla ^2 u + (\lambda - q(x,y))u = 0$ . We study the problem of reconstructing the coefficient function $q(x,y)$ (or at least a numerical approximation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c8b86e92a4702af30ba1168f19fbb6f
https://doi.org/10.1137/s0036141093253133
https://doi.org/10.1137/s0036141093253133
Autor:
David C. Barnes
Publikováno v:
SIAM Journal on Mathematical Analysis. 22:732-753
This work is concerned with the inverse eigenvalue problem for ordinary differential equations such as $y'' + (\lambda - q(x))y = 0$ and with some higher-order generalizations. A classical, well-known inverse problem is to reconstruct the coefficient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5835c226a19ca537ab05804ebc801f4
https://doi.org/10.1137/0522044
https://doi.org/10.1137/0522044
Autor:
David C. Barnes
Publikováno v:
Quarterly of Applied Mathematics. 46:605-609
We reconsider the problem of determining the shape of the strongest column having a given length l l and volume V V . Previous results [13,7] have given optimal shapes for which the cross section vanishes at certain points. Although these results are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34a6e7a07754500a434e2290a40baa89
https://doi.org/10.1090/qam/973378
https://doi.org/10.1090/qam/973378
Autor:
David C. Barnes
Publikováno v:
SIAM Journal on Mathematical Analysis. 16:341-357
Let $\lambda _n $ denote the nth eigenvalue of the equation $[R(x)y']' + [\lambda P(x) + Q(x)]y = 0$ subject to self-adjoins boundary conditions. Many applications of this equation involve calculating extremal values of $\lambda _n $ when the coeffic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e258ebeb4f3b3df2f0a793f0622a3744
https://doi.org/10.1137/0516025
https://doi.org/10.1137/0516025
Autor:
David C. Barnes
Publikováno v:
SIAM Journal on Mathematical Analysis. 19:1151-1161
This paper is actually the fourth in a series of works [SIAM J. Math. Anal., 16(1985), pp. 341-357, 1284-1294; 18(1987), pp. 933–940] whose overall purpose is to develop some variational and approximation theory for eigenvalue functionals. These fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd188137ac0edd816d864d2a0bc9a856
https://doi.org/10.1137/0519080
https://doi.org/10.1137/0519080
Autor:
David C. Barnes, R. P. Gilbert
Publikováno v:
Applicable Analysis. 13:237-248
We are concerned with eigenvalue problems of the form subject to boundary conditions in the first case and in the second case. The eigenvalues of these systems depend on the coefficients and we denote them accordingly and . We introduce some new kind
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f16ef7937e01290ade986bef70285b1
https://doi.org/10.1080/00036818208839395
https://doi.org/10.1080/00036818208839395
Autor:
David C. Barnes
Publikováno v:
SIAM Journal on Mathematical Analysis. 16:1284-1294
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff452a275d5b48a22f5d80e3b5934dbb
https://doi.org/10.1137/0516092
https://doi.org/10.1137/0516092
Autor:
David C. Barnes
Publikováno v:
Canadian Journal of Mathematics. 36:405-420
Given vectors and (or functions f(x) and g(x)) we define the Hölder Quotient Hpq by1or in case of functions by2Here ‖·‖p and ‖·‖q are the usual Lp and Lq norms. We assume throughout thatIf p and q are both greater than one then they are po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::390215038389278e1d57217815fd3b1b
https://doi.org/10.4153/cjm-1984-025-5
https://doi.org/10.4153/cjm-1984-025-5
Autor:
David C. Barnes
Publikováno v:
SIAM Journal on Mathematical Analysis. 18:933-940
We consider some random eigenvalue problems of the form $L(\cdot ) = \lambda M(.)$, where $L(\cdot )$ and $M(\cdot )$ may be ordinary or partial differential operators which depend on a (perhaps mufti-dimensional) random variable $\omega $. We genera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2037b86927a5c5f037a4daf6e1d2704f
https://doi.org/10.1137/0518071
https://doi.org/10.1137/0518071