補充內容 (2018-8-18 21:56):
[GoogleDrive]1jBkapiyX8pXPFfmI7ZACxVT0QHibRhys[/GoogleDrive]
Size Comparison of the Largest Extinct Animals of their kind ll Largest Extinct
補充內容 (2018-8-23 03:54):
[GoogleDrive]17odjIeP7uBYVP0OlmdlEFKavELrz83qg[/GoogleDrive]
Largest Extinct Vs Living Animals Size Comparison ll Largest Extinct Vs Extant Animals
COMMON NAME: Snowy Owl
SCIENTIFIC NAME: Bubo scandiaca
TYPE: Birds
DIET: Carnivores
GROUP NAME: Solitary
AVERAGE LIFE SPAN IN THE WILD: 10 years
SIZE: Body, 20 to 28 in; wingspan, 4.2 to 4.8 ft
WEIGHT: 3.5 to 6.5 lbs
SIZE RELATIVE TO A 6-FT MAN:
COMMON NAME: Great Horned Owl
SCIENTIFIC NAME: Bubo virginianus
TYPE: Birds
DIET: Carnivores
GROUP NAME:
AVERAGE LIFE SPAN IN THE WILD: 5 to 15 years
SIZE: Body, 18 to 25 in; wingspan, 3.3 to 4.8 ft
WEIGHT: 2 to 5.5 lbs
SIZE RELATIVE TO A 6-FT MAN:
大雕鴞與人類的大小比較
[GoogleDrive]1CO5wZy9Z4nQEWUh0f9bVpwZByFGVLTYo[/GoogleDrive]
Size Comparison of Biggest Birds In The World
[GoogleDrive]191d-1qOpsdz366YJZvXUUKY4bXHLA5Yo[/GoogleDrive]
Top 12 largest fish species in the world
Born-Infeld Determinantal gravity and the taming of the conical singularity in 3-dimensional spacetime
Abstract (Elsevier)
In the context of Born–Infeld determinantal gravity formulated in an n -dimensional spacetime with absolute parallelism, we found an exact 3-dimensional vacuum circular symmetric solution without cosmological constant consisting in a rotating spacetime with non-singular behavior. The space behaves at infinity as the conical geometry typical of 3-dimensional General Relativity without cosmological constant. However, the solution has no conical singularity because the space ends at a minimal circle that no freely falling particle can ever reach in a finite proper time. The space is curved, but no divergences happen since the curvature invariants vanish at both asymptotic limits. Remarkably, this very mechanism also forbids the existence of closed timelike curves in such a spacetime.
Scalar curvature [Math Processing Error]R as a function of the radial coordinate [Math Processing Error]ρ, for[Math Processing Error]J=M=1. From bottom to top: [Math Processing Error]?λ=15,10,5,3,1.
Schematic representation of the spacetime (??????)as embedded in three-dimensional Euclidean space.
Spin foams near a classical curvature singularity
Abstract (APS)
We apply the technique of the spinfoam to study space-time, which, classically, contains a curvature singularity. We derive from the full covariant loop quantum gravity (LQG) that the region near curvature singularity has to be of the strong quantum gravity effect. We show that the spinfoam configuration describing the near-singularity region has to be of small spins j, in order that its contribution to the full spinfoam amplitude is nontrivial. The spinfoams in low and high-curvature regions of space-time may be viewed as in two different phases of covariant LQG. There should be a phase transition as space-time described by the spinfoam becomes more and more curved. A candidate of the order parameter is proposed for understanding the phase transition. Moreover, we also analyze the spin-spin correlation function of the spinfoam and show the correlation is of long range in the low-curvature phase. This work is a first step toward understanding the physics of black hole and early Universe from the full covariant LQG theory.
A Schwarzschild space-time. Region A is a sub-space-time which is far from the horizon. Region B is a sub-space-time which is inside the horizon. Region B′′ is a sub-space-time which is near the quantum region of the black hole singularity.
[GoogleDrive]1_SCMTj7Q0Ds5G9XEcCe5bQZq8UMN6Mba[/GoogleDrive]
the scale of the universe (size comparison)
多謝各師兄分享和支持，在下這帖子暫告一段落，特别鳴謝barying兄的分享和支持。
the scale of the universe (size comparison)(這樓（272樓）視頻)，背景音樂造得很好！在下聽到這BGM和視頻，
就令在下想起barying兄這分享：相對論解釋了我們這個宇宙中一切的物理運動，愛因斯坦說，時間和空間是人們認知的錯覺。時間是因為宇宙萬事萬物的變化，讓人們產生了時間的概念。
樓主: tigerb
在線雷達
發表於 2018-7-22 02:54:34
