Results 221 to 230 of about 321,758 (264)
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The mechanics of focal chondral defects in the hip
Journal of Biomechanics, 2017There is a mean incidence of osteoarthritis (OA) of the hip in 8% of the overall population. In the presence of focal chondral defects, defined as localized damage to the articular cartilage, there is an increased risk of symptomatic progression toward OA.
Brenden J, Klennert +4 more
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Mechanisms of focal ventricular tachycardia in humans
Heart Rhythm, 2009In classifying ventricular arrhythmias, a fundamental distinction is made between focal and macroreentrant mechanisms. Focal arrhythmias demonstrate early activation at a particular site with centrifugal spread of the impulse from this site of origin. In contrast, macroreentrant rhythms involve contiguous but spatially distributed areas of activation ...
Steven M, Markowitz, Bruce B, Lerman
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Mechanisms of Focal Adhesion Kinase Regulation
Current Cancer Drug Targets, 2005Focal adhesion kinase (FAK) is a tyrosine kinase whose phosphorylation state and activity is tightly linked to cell adhesion to the extracellular matrix through integrin receptors. FAK's regulation by adhesion places it in a key position to be able to influence cellular events that are either dependent on cell adhesion like cell proliferation and ...
Lee Ann, Cohen, Jun-Lin, Guan
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Reliability of focal mechanism determination
Studia Geophysica et Geodaetica, 1981The fault plane solution determined by means of a computer algorithm, correlating the radiation pattern with the distribution of observations, was investigated from the point of view of its reliability. The maximum of the correlation function R corresponds to the optimum solution found by the computer.
Karel Klíma, Libuše Ruprechtová
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Focal Epilepsies: Immunologic and Inflammatory Mechanisms
Seminars in Pediatric Neurology, 2014There is increasing evidence documenting activation of inflammatory processes in focal epilepsies. This review article summarizes current data regarding immune mediated inflammatory processes in patients with symptomatic partial epilepsies such as mesial temporal sclerosis, focal cortical dysplasia, and Rasmussen's encephalitis.
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Mechanisms of Disease: focal segmental glomerulosclerosis
Nature Clinical Practice Nephrology, 2005Focal segmental glomerulosclerosis (FSGS), a subtype of "idiopathic nephrotic syndrome", is not a single disease, but a lesion that initially affects the glomerulus followed by the tubulointerstitium and renal vessels. The term 'FSGS' does not accurately encompass the various pathologic features of the glomerulus, which are not always focal, segmental ...
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The Focal Mechanism of Earthquakes
1962Publisher Summary This chapter discusses the development of Byerly's method of fault-plane determination. The essential features of the methods of focal mechanism study are established and their efficacy as a means of investigating the origins of earthquakes has been demonstrated. The focal mechanism studies of earthquakes intend two things.
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1961
It is shown that a system of forces consisting of three couples without moment introduces a cone of the second degree as the surface separating the compressions and dilatations as recorded at extended distances. This cone is the generalization of the pair of planes associated with a single couple with moment or with two couples without moment.
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It is shown that a system of forces consisting of three couples without moment introduces a cone of the second degree as the surface separating the compressions and dilatations as recorded at extended distances. This cone is the generalization of the pair of planes associated with a single couple with moment or with two couples without moment.
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Seismicity, focal mechanisms, and tectonics
Reviews of Geophysics, 1983In the last four years, there has been a tremendous increase in the detail of tectonic processes reported in the typical seismotectonic study. New data from many local and regional networks of seismographs established during the previous four‐year period, plus the now routine application of improved hypocentral location procedures, long‐period body ...
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Focal Mechanism and Seismogram Modeling
2010The focal mechanism or the fault plane solution describes the orientation of the fault and the slip on the fault relative to a geographical coordinate system. The focal mechanism is the most important parameter to determine once the location and magnitude are known and it is used to determine the actual geometry of the faults as well as inferring the ...
Jens Havskov, Lars Ottemöller
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