The Curie temperature is found to be 660 K for film thicknesses down to 8 nm and decreases almost linearly for thinner films. For the whole ferromagnetic temperature range the intrinsic magnetic material parameters (saturation polarization J(s), magnetocrystalline anisotropy constant K-1, exchange constant A) and the coercivity mu H-0(c) are determined as a function of the film thickness. Furthermore the microstructural parameters are ascertained by analyzing the temperature LY2603618 price dependence of the coercivity within the framework of micromagnetism leading to a deeper understanding of the magnetic reversal process. (C) 2010 American Institute of Physics.
“Purpose: To determine if sclerotic bone lesions evident at body computed tomography (CT) are of value as a diagnostic criterion of tuberous sclerosis complex (TSC) and in the differentiation of TSC with lymphangioleiomyomatosis Citarinostat in vivo (LAM) from sporadic LAM. Materials and
Methods: Informed consent was signed by all patients in this HIPAA-compliant study approved by the institutional review
board. Retrospective analysis was performed of the body CT studies of 472 patients: 365 with sporadic LAM, 82 with TSC/LAM, and 25 with TSC. The images were reviewed by using a picture archiving Selleckchem SYN-117 and communication system workstation with bone settings (window width, 1500 HU; window
level, 300 HU) and fit-to-screen option. CT image characteristics assessed included shape, size, and distribution of sclerotic bone lesions with subsequent calculation of differences in the frequency of these lesions.
Results: Most commonly the sclerotic bone lesions were round, measured 0.3 cm (range, 0.2-3.2), and were distributed throughout the spine. The frequencies differed among the three patient groups Four or more sclerotic bone lesions were detected in all 25 (100%) of those with TSC, with a sensitivity of .89 (72 of 82) and specificity of .97 (355 of 367) in the differentiation of sporadic LAM from TSC/LAM (P<.01).
Conclusion: The number of sclerotic bone lesions at body CT is of potential value in the diagnosis of TSC and in the differentiation of patients with sporadic LAM from those with TSC/LAM. (C)RSNA, 2010″
“This paper studies the poroelastic behavior of an alginate hydrogel by a combination of theory and experiment. The gel-covalently crosslinked, submerged in water, and fully swollen-is suddenly compressed between two parallel plates. The gap between the plates is held constant subsequently, and the force on the plate relaxes while water in the gel migrates. This experiment is analyzed by using the theory of linear poroelasticity.