Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Peter J. Ayre"'
Autor:
Peter J. Ayre, Catherine Greenhill
Publikováno v:
SIAM Journal on Discrete Mathematics. 33:1575-1606
We consider the problem of $q$-coloring a $k$-uniform random hypergraph, where $q,k \geq 3$, and determine the rigidity threshold. For edge densities above the rigidity threshold, we show that almo...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85172812e3325bc7e632b17fdefe3fe4
https://doi.org/10.1137/18m1207211
https://doi.org/10.1137/18m1207211
We prove that a formula predicted on the basis of non-rigorous physics arguments [Zdeborova and Krzakala: Phys. Rev. E (2007)] provides a lower bound on the chromatic number of sparse random graphs. The proof is based on the interpolation method from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::519a69a43d5da634383d0bc5422b1913
http://arxiv.org/abs/1812.09691
http://arxiv.org/abs/1812.09691
Let $A$ be a random $m\times n$ matrix over the finite field $F_q$ with precisely $k$ non-zero entries per row and let $y\in F_q^m$ be a random vector chosen independently of $A$. We identify the threshold $m/n$ up to which the linear system $A x=y$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4efc4e87cedbf1b9fccf53a71ca26bac
http://arxiv.org/abs/1710.07497
http://arxiv.org/abs/1710.07497
Autor:
Peter J. Ayre, Einly Lim, Nigel H. Lovell, Socrates Dokos, Franklin L. Rosenfeldt, Robert F. Salamonsen
Publikováno v:
Artificial Organs. 36:E110-E124
A heart-pump interaction model has been developed based on animal experimental measurements obtained with a rotary blood pump in situ. Five canine experiments were performed to investigate the interaction between the cardiovascular system and the imp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a16e27e019e0372467ad50ba807d3627
https://doi.org/10.1111/j.1525-1594.2012.01449.x
https://doi.org/10.1111/j.1525-1594.2012.01449.x
Autor:
Einly Lim, Peter J. Ayre, Franklin L. Rosenfeldt, Nigel H. Lovell, Socrates Dokos, Robert F. Salamonsen
Publikováno v:
Artificial Organs. 36:E125-E137
Numerical models, able to simulate the response of the human cardiovascular system (CVS) in the presence of an implantable rotary blood pump (IRBP), have been widely used as a predictive tool to investigate the interaction between the CVS and the IRB
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73df65253fe162c61db99f35994a6145
https://doi.org/10.1111/j.1525-1594.2012.01448.x
https://doi.org/10.1111/j.1525-1594.2012.01448.x
Autor:
Peter J. Ayre, Abdul-Hakeem H. Alomari, Einly Lim, David Glen Mason, Andrey V. Savkin, John F. Fraser, Robert F. Salamonsen, Nigel H. Lovell
Publikováno v:
Physiological Measurement. 32:1035-1060
We propose a dynamical model for mean inlet pressure estimation in an implantable rotary blood pump during the diastolic period. Non-invasive measurements of pump impeller rotational speed (ω), motor power (P), and pulse width modulation signal acqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07e282495fffca10c52230ba9deda1bd
https://doi.org/10.1088/0967-3334/32/8/004
https://doi.org/10.1088/0967-3334/32/8/004
Publikováno v:
Artificial Organs. 35:E47-E53
Responses of four rotary blood pumps (Incor, Heartmate II, Heartware, and Duraheart) at a single speed setting to changes in preload and afterload were assessed using the human left ventricle as a benchmark for comparison. Data for the rotary pumps w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a897661d15ea805477c8de6d8493fdee
https://doi.org/10.1111/j.1525-1594.2010.01168.x
https://doi.org/10.1111/j.1525-1594.2010.01168.x
Autor:
Shaun L. Cloherty, Peter J. Ayre, Nigel H. Lovell, Dean M. Karantonis, David Glen Mason, Robert F. Salamonsen
Publikováno v:
ASAIO Journal. 53:617-622
An integral component in the development of a control strategy for implantable rotary blood pumps is the task of reliably detecting the occurrence of left ventricular collapse due to overpumping of the native heart. Using the noninvasive pump feedbac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f1c94c53947055cfb447aee9b84679f
https://doi.org/10.1097/mat.0b013e318147e6a9
https://doi.org/10.1097/mat.0b013e318147e6a9
Autor:
Nicolò Malagutti, Robert F. Salamonsen, Peter J. Ayre, Shaun L. Cloherty, David Glen Mason, Dean M. Karantonis, Nigel H. Lovell
Publikováno v:
Artificial Organs. 31:45-52
The effect of blood hematocrit (HCT) on a noninvasive flow estimation algorithm was examined in a centrifugal implantable rotary blood pump (iRBP) used for ventricular assistance. An average flow estimator, based on three parameters, input electrical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8cc75efe795f3d9abf2f30aa372b855
https://doi.org/10.1111/j.1525-1594.2007.00339.x
https://doi.org/10.1111/j.1525-1594.2007.00339.x
Improving a result of Dyer, Frieze and Greenhill [Journal of Combinatorial Theory, Series B, 2015], we determine the $q$-colorability threshold in random $k$-uniform hypergraphs up to an additive error of $\ln 2+\varepsilon_q$, where $\lim_{q\to\inft
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e0c48d2d03576c46bebfa9396a64fd9