Gravitational field

Xem 1-12 trên 12 kết quả Gravitational field
  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí y học Molecular Biology cung cấp cho các bạn kiến thức về ngành sinh học đề tài: Gravitation field algorithm and its application in gene cluster...

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  • In this paper, we introduce a vector model to describe gravitational field. The model is based on the assumption that the gravitational mass is Lorentz invariant . We introduce a non- relativistic equation system to describe the gravitational field, then we generalize it to obtain a relativistic equation system . dent

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  • In this paper, based on the vector model for gravitational field we have found a metric tensor of the space –time that in the first order approximate it lead to the Schwarzschild metric tensor in the General Theory of Relativity(GTR).

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  • THE transport swung past Centaurus on the last leg of her long journey to Sol. There was no flash, no roar as she swept across the darkness of space. As silent as a ghost, as quiet as a puff of moonlight she moved, riding the gravitational fields that spread like tangled, invisible spider webs between the

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  • Dramatic progress has been made in all branches of physics since the National Research Council's 1986 decadal survey of the field. The Physics in a New Era series explores these advances and looks ahead to future goals. The series includes assessments of the major subfields and reports on several smaller subfields, and preparation has begun on an overview volume on the unity of physics, its relationships to other fields, and its contributions to national needs.

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  • Special and general relativity are the theories describing the physics of space and time. Space and time are explored with clocks and electromagnetic signals. Therefore, special and general relativity are related to precise clocks and the thorough understanding of signal propagation. The ever-increasing accuracy of clocks together with novel methods for precision time transfer and clock synchronization are pivotal for the new generation of experiments probing the validity of Einstein’s theories from subatomic distances to cosmic scales....

    pdf660p tom_123 14-11-2012 25 6   Download

  • Gravitation, cosmology, and cosmic-ray physics are often regarded as subfields of astrophysics, as well as physics, because they are practiced by using physical techniques in an astronomical setting. However, this report makes no pretense of surveying all of astrophysics; that enormous task was excellently done by the Astronomy Survey Committee (George B. Field, chairman). Their report, Astronomy and Astrophysics for the 1980's (National Academy Press, Washington, D.C., 1982), has been widely circulated, and its recommendations are currently being considered and implemented.

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  • This book deals with topics in atomic and molecular structure and dynamics that are important to astronomy. Indeed, the topics selected are of central interest to the field of astronomy, many having been initiated by the needs of understanding worlds other than ours. Except for some lunar surface material returned by the Apollo missions, and material naturally delivered to us by cosmic rays, comets, and meteors, our only access to the other worlds of our astronomical Universe is through our observations of electromagnetic radiation from them.

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  • (BQ) Part 2 book "A first course in general relativity" has contents: Physics in a curved spacetime, the einstein field equations, gravitational radiation, spherical solutions for stars, schwarzschild geometry and black holes, cosmology.

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  • Beside the effect of gravitational forces, the water level in Sai Gon-Dong Nai River System is also affected by non gravitational forces such a wind, air pressure, rainfall and sea level rise. The purpose of this paper is to simulate the water level of these river based on the tidal and non-tidal constituents, from that assess the role of non-tidal constituents to water variation. In this study, the none-tidal data used includes the wind field at surface, sea level pressure and the rainfall in Sai Gon- Dong Nai Basin. With the analyzed data series from 1980 to 2007, the results...

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  • It is important to note that the problem is not just a lack of proficiency among American students; there is also a lack of interest in STEM fields among many students. Recent evidence suggests that many of the most proficient students, including minority students and women, have been gravitating away from science and engineering toward other professions. Even as the United States focuses on low-performing students, we must devote considerable attention and resources to all of our most high-achieving students from across all groups....

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  • and the rapidity with which we could rise and fall, indeed made us difficult prey. In addition to this we were hanging behind the great electric field that the Radio Defensive Corps had spread like a screen before our forces, greatly to the embarrassment of the enemy in the use of his anti-gravitational machines. As we stood at our posts, we saw the great degravitated bombs hurtled against our lines suddenly come into contact with the fan-like electric field, some

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