Shot-geophone migration, commonly accomplished using wavefield depth extrapolation (“survey sinking”), has a two way reverse time realization as well. The reverse time version permits imaging of overturned reflections. Shot-geophone migration differs from other prestack migrations in the definition of the prestack image volume which it creates. This difference is most clearly seen by identifyin...

A number of inverse problems in wave propagation admit division of the model space into kinematic or propagator variables and dynamic or amplitude (or reeectivity, or source, or...) variables. The dynamic variables have a linear or essentially linear innuence on the simulated data, hence the best t formulations of inverse problems are separable in the sense of nonlinear programming. Mean square...

Avrupa Birliği ülkeleri son yüzyılın en önemli göç destinasyonlarından birini oluşturmaktadır. Göçe dair meseleler eskiden devletlerin kendi egemenlik alanında iken AB projesinin gelişimi ile bu alanlarda Birliğin ulus-üstü organlarının yetkileri artmıştır. Yani politikalarında uzun bir süre hükümetler arası yaklaşım tercih edilirken zamanla kısmi ortak politikanın gelişiminden de söz edilmekte...

introduction: n-methyl-d-aspartate receptor subunits antibody (nr2-ab) is a sensitive marker of ischemic brain damage in clinical circumstances, such as cerebrovascular accidents. we aimed to assess the value of serum nr2-ab in predicting the post-cardiopulmonary resuscitation (cpr) survival. methods: in this cohort study, we examined serum nr2-ab levels 1 hour after the return of spontaneous c...

the diabetes is an autoimmune disease, in which the role of autoantibodies is of a specific importance. the appearance of these autoantibodies can be the first symptom in the serum of type i diabetic patients, which may appear ten years before onset of the disease. the most important autoantibodies include glutamic acid decarboxylase autoantibodies (gad65-ab). this can be used as a good tool fo...