Zobrazeno 1 - 10
of 13
pro vyhledávání: '"R. H. Weening"'
Autor:
Alexander C. Wright, Bryon R. Gomberg, Branimir Vasilic, Hee Kwon Song, R. H. Weening, Punam K. Saha, Felix W. Wehrli
Publikováno v:
Bone. 35:266-276
The mechanical competence of trabecular bone is significantly determined, next to material density, by its three-dimensional (3D) structure. Recent advances in micromagnetic resonance imaging (micro-MRI) acquisition and processing techniques allow th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b33b2722ba00a9a2a9807272ebb085c0
https://doi.org/10.1016/j.bone.2004.02.017
https://doi.org/10.1016/j.bone.2004.02.017
Autor:
Andrew Cucchiara, Bryon R. Gomberg, Peter J. Snyder, Babette S. Zemel, Hee Kwon Song, Alexander C. Wright, R. H. Weening, Maria Benito, Felix W. Wehrli
Publikováno v:
The Journal of Clinical Endocrinology & Metabolism. 88:1497-1502
Bone strength depends on trabecular architecture, characterized by interconnected plates and rods. In osteoporosis, the plates become fenestrated, resulting in more rods that deteriorate and become disconnected. In men, hypogonadism is a common cause
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6305e58b269ed229b8d2238de201b790
https://doi.org/10.1210/jc.2002-021429
https://doi.org/10.1210/jc.2002-021429
Autor:
R. H. Weening
Publikováno v:
Physics of Plasmas. 7:3654-3662
An analytic spherical torus plasma equilibrium model is developed from a general solution to the Grad–Shafranov equation. The analytic model allows the calculation of axisymmetric plasma equilibria with arbitrary aspect ratio, elongation, triangula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c9adcb885fd5061c4586a5e396ba6fd
https://doi.org/10.1063/1.1287828
https://doi.org/10.1063/1.1287828
Autor:
R. H. Weening
Publikováno v:
Plasma Physics and Controlled Fusion. 38:1831-1848
Theoretical and computational analyses of bootstrapped tokamaks with oscillating field current drive (OFCD) have been developed using a nonlinear magnetic helicity model. Assuming a rigid current profile, the conditions for optimal tokamak steady-sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67276aaecdb626721f9d2896a4c86d61
https://doi.org/10.1088/0741-3335/38/10/011
https://doi.org/10.1088/0741-3335/38/10/011
Autor:
R. H. Weening
Publikováno v:
Physics of Plasmas. 2:2735-2743
The nonlinear response of bootstrapped tokamaks to oscillating field current drive (OFCD) is studied with the aid of a formal mathematical solution. The tokamak plasma response to OFCD is shown to be similar to that of a driven inductor–resistor (L
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6581d0e6f3d3e0e701a542656243e204
https://doi.org/10.1063/1.871238
https://doi.org/10.1063/1.871238
Autor:
R. H. Weening
Publikováno v:
Physics of Fluids B: Plasma Physics. 5:2229-2234
A magnetic helicity conserving mean‐field Ohm’s law is used to study bootstrapped tokamaks with oscillating field current drive. The Ohm’s law leads to the conclusion that the tokamak bootstrap effect can convert the largely alternating current
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee8370c757b3796453be964368f751b3
https://doi.org/10.1063/1.860756
https://doi.org/10.1063/1.860756
Autor:
R. H. Weening
Publikováno v:
Physics of Fluids B: Plasma Physics. 5:1270-1273
A mean‐field Ohm’s law is used to determine the effects of the bootstrap current on quasihelically symmetric stellarator equilibria. The Ohm’s law leads to the conclusion that the effects of the bootstrap current break the quasihelical stellara
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::332fd0d8763600f5d265c96ff6fb0722
https://doi.org/10.1063/1.860917
https://doi.org/10.1063/1.860917
Autor:
Allen H. Boozer, R. H. Weening
Publikováno v:
Physics of Fluids B: Plasma Physics. 4:159-170
Numerical simulations of the evolution of large‐scale magnetic fields have been developed using a mean‐field Ohm’s law. The Ohm’s law is coupled to a Δ’ stabilty analysis and a magnetic island growth equation in order to simulate the behav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51068896cdf2d943d6b229be119551ab
https://doi.org/10.1063/1.860429
https://doi.org/10.1063/1.860429
Autor:
R. H. Weening, Punam K. Saha, Peter J. Snyder, Alexander C. Wright, Hee Kwon Song, Felix W. Wehrli, Bryon R. Gomberg, Maria Benito
Publikováno v:
Topics in magnetic resonance imaging : TMRI. 13(5)
The strength of trabecular bone and its resistance to fracture traditionally have been associated with apparent density. This paradigm assumes that neither the ultrastructural nor microstructural make-up of the bone is altered during aging and osteop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08cb2a7cd952b11d28a9113816dd0194
https://pubmed.ncbi.nlm.nih.gov/12464746
https://pubmed.ncbi.nlm.nih.gov/12464746
Autor:
R. H. Weening
Publikováno v:
Physics of Plasmas. 19:062502
In order to model the effects of small-scale current-driven magnetic fluctuations in a mean-field theoretical description of a large-scale plasma magnetic field B(x,t), a space and time dependent hyper-resistivity Λ(x,t) can be incorporated into the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db01c6422172368803b8a0b8e8946fc7
https://doi.org/10.1063/1.4728080
https://doi.org/10.1063/1.4728080