Very Light and Fast

A very fast parallel object store for very fast applications

An architecture for a memory-resident, Parallel and Persistent ObjectSTore (PPOST) is suggested. Different object-oriented databases might be built on top of PPOST. The term memory-resident (or main memory based) means that the primary storage device is main memory. Persistence is guaranteed automatically by managing secondary and stable storage devices (such as main memory with uninterrupted p...

Very Light Axion

Here, the question arises, “Why is |θ̄| so small?”, which is the parameter problem in the standard model. It is commonly called the strong CP problem. Most small parameters in physics have led to some ideas, mostly those related to symmetries. For example, the small ratio MW /MP ≪ 1 (the so-called gauge hierarchy problem) led to supersymmetric solution [3], and mu,md ≪ 1 GeV led to the chiral sy...

{ 1{ Axions and Other Very Light Bosons Axions and Other Very Light Bosons, Part I (theory)

(by H. Murayama) In this section we list limits for very light neutral (pseudo) scalar bosons that couple weakly to stable matter. They arise if there is a global continuous symmetry in the theory that is spontaneously broken in the vacuum. If the symmetry is exact, it results in a massless Nambu{Goldstone (NG) boson. If there is a small explicit breaking of the symmetry, either already in the ...

Very Fast Simulated Re-Annealing

The Very Fast Curvelet Transform

The Digital Curvelet Transform provides near-optimal reconstruction of twice-continuously differentiable (C) curves. Previous implementations of the algorithm have not exploited newer technologies in modern processors, including the MMX and SSE instruction sets. Various optimization techniques were used on a form of the Digital Curvelet Transform resulting in the fastest Curvelet Transform curr...