نتایج جستجو برای: sachs
تعداد نتایج: 3031 فیلتر نتایج به سال:
We calculate the Hilbert action for the Bondi-Sachs metrics. It yields the Einstein vacuum equations in a closed form. Following the Dirac approach to constrained systems we investigate the related Hamiltonian formulation.
The present case shows a case of fracture-redislocation of the hip caused by a depressed fracture of the femoral head similar to a Hill-Sachs lesion. A 59-year-old man fell from a roof and his left hip joint was dislocated posteriorly. He was admitted to a nearby hospital, and he was referred to our hospital more than 24 hours after injury. Computed tomography (CT) suggested a bone chip from th...
The carbohydrate composition was determined for ceramide hexosides isolated from brains of patients with Tay-Sachs disease and generalized gangliosidosis (hereby named GM1-gangliosidosis). Gray matter of patients with each disease showed a characteristic abnormal ceramide hexoside pattern. In Tay-Sachs gray matter, ceramide trihexoside is the major component, whereas ceramide tetrahexoside is b...
INTRODUCTION: The presence of either a Hill-Sachs or a bony Bankart lesion has been indicated as a possible cause of subluxation and anterior shoulder dislocation. Anterior dislocation accounts for approximately 98% of all shoulder dislocations. 2 Common treatments include soft tissue repair, bone grafting, and total shoulder replacement. It has been reported that there is a possibility of recu...
OBJECTIVE GM2-Gangliosidosis disease is a rare autosomal recessive genetic disorder that includes two disorders (Tay-Sachs and Sandhoff disease).These disorders cause a progressive deterioration of nerve cells and inherited deficiency in creating hexosaminidases A, B, and AB. MATERIALS & METHODS Patients who were diagnosed withGM2-Gangliosidosis in the Neurology Department of Mofid Children's...
Starting from a variational principle for perfect fluids, we develop a Hamiltonian formulation for perfect fluids coupled to gravity expressed in Ashtekar’s spinorial variables. The constraint and evolution equations for the gravitational variables are at most quadratic in these variables, as in the vacuum case and in the coupling of gravity to other matter fields, while some of the matter evol...
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