the geometry of space

Ngày tải lên: 31/03/2014, 16:17

Ngày tải lên: 11/06/2014, 12:58

... radiation they emit in the last stages of their formation. • The use of gravitational waves to probe the universe of complex astro- nomical phenomena by the decoding of the details of the gravitational ... to explore the extraordinary properties of the geometry of space in the vicinity of black holes that are predicted by general relativity. • The measurement of the dragging of inertial frames due to the ... of the foundations of general relativity. It is one of the most accurately tested predictions in all of physics. The equality of accelerations of different bodies in the curved spacetime of the...

Ngày tải lên: 12/02/2014, 16:20

... at the wide pointed doors, depositing them in the midst of the crowd. The jagged lightning flash was there over the doors of the build- ing, and the words: here, by grace of the Lhari, is the ... passengers, then veering away. The gap in the starship's side was closing, and still Bart had not seen the tall, slim, flame-haired figure of his father. The port on the other side of the ship, he ... his eyes from the fascinating spectacle, and followed Tommy, stepping onto one of the sidewalks. It bore them down a long, sloping ramp toward the floor of the spaceport, then sped toward the glass...

Ngày tải lên: 17/02/2014, 09:20

Ngày tải lên: 21/02/2014, 16:20

... stripped of their electrons and the nuclei squeezed together, weighing in the neighborhood of a couple of tons per square inch. That could account for the beginning, but once the thing got started, the wrecked ... that was the first time they had touched since they had left the asteroid. Then they rested for a few moments and drank some of the achingly cold water from the tank and got up and went to the viewport. They ... miniature. "Spaceships," Diane said. "Spaceships, Ralph. Hundreds of them." They gleamed like silver motes in the sun or were black as the space around them. They tumbled slowly, in incredible...

Ngày tải lên: 06/03/2014, 09:22

... right off the map - to somewhere else! First there is the new thin coldness of the air, the blazing corona and dullness of the sun, the visibility of the stars in high daylight. Then comes the ... through space with the ship into the dead-area." The score of members of the crew, bronzed space- sailors out of every port in the solar system, had listened mutely. Now, one of them, a tall tube-man, ... SF story of the year (this was the first SF prize awarded by the votes of fans, a precursor of the later Hugo Awards). In the later 1930s, in response to the economic strictures of the Great...

Ngày tải lên: 06/03/2014, 15:20

... laboratory space, and offices for the observatory staff. One of the 4-kilometer arms disappears out of the right-hand side of the photo. The other is seen stretching to the upper left. At the 2-kilometer ... radiation they emit in the last stages of their formation. • The use of gravitational waves to probe the universe of complex astro- nomical phenomena by the decoding of the details of the gravitational ... to explore the extraordinary properties of the geometry of space in the vicinity of black holes that are predicted by general relativity. • The measurement of the dragging of inertial frames due to the...

Ngày tải lên: 14/03/2014, 10:20

Ngày tải lên: 23/03/2014, 12:20

Ngày tải lên: 31/03/2014, 16:16

Ngày tải lên: 31/03/2014, 16:17

Ngày tải lên: 29/04/2014, 15:45

Ngày tải lên: 12/05/2014, 16:24

Ngày tải lên: 04/06/2014, 12:44

Ngày tải lên: 05/06/2014, 18:36

Ngày tải lên: 12/06/2014, 16:18

... into the cement and therefore, the total dose of antibiotics should not exceed 10% of the weight of the cement in order to avoid fracture of the cement spacer [27]. The implantation of an ... static spacers [37]. Duncan and Beauchamp [38] first described the successful use of PROSTALAC for the 2-stage revision of infected THA. The cement of the femoral head articulated with the ... accumulating in the potential joint space and decreasing the risk of soft-tissue contractures [18]. Recent studies [19] suggest that the ALC may remove the need for systemic antibiotics in the interval...

Ngày tải lên: 26/10/2012, 09:53

... which of the above mentioned techniques is the most superior one in the prevention of spacers’ dislocations regarding the femoral part. In the literature, the dislocation rates after hip spacer ... depending on the art of the spacer’s production as well as the fixa- tion method. Leunig et al. [18] reported dislocations of the hip in 5 of 12 patients after use of hand-formed spacers, whereas ... whereas in 7 cases the spacer remained in situ because either the patient was not willing to undergo further surgery or because the comorbidities of the patient did not allow the prosthesis reimplan- tation....

Ngày tải lên: 26/10/2012, 09:53

... and insertion of a cement-coated modular prosthesis with a spacer head. The cement mantle of the prosthesis is also antibiotic-loaded according to the sensitivity profile of the causative ... • the patient is not compliant, • partial weight bearing of the operated extremity cannot be tolerated, • the spacer is insufficiently fixated onto the proximal femur, • the size of the spacer ... hip spacer in situ, the spacer stem is inserted into the femur according to a “press-fit” method. Figure 2: Articulating hip spacer in situ, the partial cemen- tation of the spacer onto the...

Ngày tải lên: 26/10/2012, 09:53