A similar type of nonlocal nonlinear Schrödinger (NLS) system arises in both water waves and nonlinear optics. The nonlocality is due to a coupling between the first harmonic and a mean term. These systems are termed nonlinear Schrödinger with mean or NLSM systems. They were first derived in water waves by Benney-Roskes and later by Davey-Stewartson. Subsequently similar equations were derived ...

This paper makes two pedagogical contributions. First, we describe two macro operators for best-first search algorithms: the collapse macro where a subtree is deleted from memory and its best frontier value is stored in its root, and, the restore macro (the inverse of collapse) where the subtree is restored to its previous structure. We show that many known search algorithms can be easily descr...

We performed molecular dynamics simulations of the collapse of a two-domain protein, the BphC enzyme, into a globular structure to examine how water molecules mediate hydrophobic collapse of proteins. In the interdomain region, liquid water persists with a density 10 to 15% lower than in the bulk, even at small domain separations. Water depletion and hydrophobic collapse occur on a nanosecond t...

We investigate here the final state of gravitational collapse a non-spherical and non-marginally bound dust cloud as modeled by Szekeres spacetime. show that directionally globally naked singularity can be formed in this case near collapsing boundary, not at its geometric center is typically for spherical collapse. This strong curvature sense Tipler criterion on strength. The null geodesics esc...

Core yarn was spun by introducing a PVA multifilament as the core through the yarn forming zone of a ring spinning frame and viscose fibers as the sheath containing tracer fibers. The water soluble PVA multifilament was extracted from the yarn structure. Then internal structure and properties of the hollow ring yarn was assessed and compared with those of typical ring yarns. Also, two plain fab...

the nano-cry zeolite synthesized and characterized by fourier transfer infrared (ft-ir), x-ray diffraction (xrd),and scanning electron microscopy (sem).the result show that nano catalyst prepared with mainly particles size about 30-80 nm .the xrd show the structure of the zeolite does not collapse. this nano-cry zeolite has been used as new, and nontoxic catalyst for catalyzes of synthesis of 2...

we try the best to scrutinize the process of cooperation and especially the convergence between russian and north atlantic treaty based on constructivism theory. both sides have continued the enmity after terminating cold war and collapse of russia, despite of change in international structure and patterns. both sides could have solved common needs and problems through more cooperation and coll...

Ribozymes must fold into compact, native structures to function properly in the cell. The first step in forming the RNA tertiary structure is the neutralization of the phosphate charge by cations, followed by collapse of the unfolded molecules into more compact structures. The specificity of the collapse transition determines the structures of the folding intermediates and the folding time to t...