61. |
|
|
62. |
|
|
63. |
- Brodin, Gert, 1963-, et al.
(författare)
-
Effects of the g factor in semiclassical kinetic plasma theory
- 2008
-
Ingår i: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 101:24, s. 245002-245006
-
Tidskriftsartikel (refereegranskat)abstract
- A kinetic theory for spin plasmas is put forward, generalizing those of previous authors. In the model, the ordinary phase space is extended to include the spin degrees of freedom. Together with Maxwell's equations, the system is shown to be energy conserving. Analyzing the linear properties, it is found that new types of wave-particle resonances are possible that depend directly on the anomalous magnetic moment of the electron. As a result, new wave modes, not present in the absence of spin, appear. The implications of our results are discussed.
|
|
64. |
|
|
65. |
|
|
66. |
- Brodin, L A, et al.
(författare)
-
[Hopeful future for echocardiography. Progress within both the function and perfusion areas].
- 2000
-
Ingår i: Läkartidningen. - 0023-7205 .- 1652-7518. ; 97:46, s. 5302-4, 5307
-
Tidskriftsartikel (refereegranskat)abstract
- Echocardiography is presently a feasible method for quantitative estimation of intracardiac flows, pressure levels and for hemodynamic evaluation of valvular disease. The evaluation of regional myocardial function is still based on subjective scrutiny, and no routine method for the estimation of myocardial blood flow is available. We present an overview of newly developed techniques that are beginning to gain purchase in clinical practice. The use of native second harmonic imaging to improve image quality and of tissue Doppler to provide objective measurements of regional myocardial function is discussed. This article describes the transformation of tissue Doppler information into parametric images as in strain rate imaging, and overviews the use of ultrasound contrast agents. Used together with new imaging modalities, myocardial contrast echocardiography holds promise for future quantification of myocardial blood volume and flow. Other emerging echocardiographic technologies discussed are non-invasive measurement of coronary flow reserve and three dimensional cineloop visualization, developed to increase our understanding of cardiovascular physiological and anatomical coupling.
|
|
67. |
|
|
68. |
|
|
69. |
|
|
70. |
|
|