A systematic study of large-scale velocity structures in turbulent thermal convection is carried out in three different aspect-ratio cells filled with water. Laser Doppler velocimetry is used to measure the velocity profiles and statistics over varying Rayleigh numbers Ra and at various spatial positions across the whole convection cell. Large velocity fluctuations are found both in the central...

We present a general construction of model category structures on the category C(Qco(X)) of unbounded chain complexes of quasi-coherent sheaves on a semi-separated scheme X. The construction is based on making compatible the filtrations of individual modules of sections at open affine subsets of X. It does not require closure under direct limits as previous methods. We apply it to describe the ...

Hui Li Analysis Department of Mechanical Engineering, Faculty of Engineering, Kagoshima University, In order to identify coherent structure of turbulent shear flow, a new combination 1-21-40, Korimoto, of familiar techniques of signal processing, called wavelet correlation analysis, is Kagoshima City, Japan developed based on the wavelet transform. The wavelet correlation analysis provides Mem....

We investigate the question of independent and coherent production of pions in high energy processes. A model for coherent production is suggested and the restrictions due to momentum conservation, charge conservation, and isospin conservation are dealt with in detail. A formalism for the isospin analysis of identical pions is developed and applied to coherent states. Results and consequences a...

Observation and Control of Interfacial Defects in ZnO/ZnSe Coaxial Nanowires W.A. Bhutto, Z.M. Wu∗, Y.Y. Cao, W.P. Wang and J.Y. Kang∗ Fujian Key Laboratory of Semiconductor Materials and Applications, Department of Physics, Xiamen University Xiamen 361005, P.R. China ZnO/ZnSe coaxial nanowires with di erent ZnO core diameters were synthesized by using a two-step chemical vapor deposition. The ...

A cellular string of a polytope is sequence faces stacked on top each other in given direction. The poset strings, ordered by refinement, known to be homotopy equivalent sphere. subposet coherent strings the face lattice fiber polytope, hence homeomorphic In some special cases, every coherent. Such polytopes are said all-coherent. We give complete classification zonotopes with all-coherence pro...

strategic coalition is a model for regional development and new regionalism. in this process, multinational corporation has basic role for economic partnership with national and regional countries. this trend have been for in formed free trade association situation. regional organizations and frameworks can help determine the perceived regional and global development. global framework activitie...

We introduce a model of coherence which captures the intentional discourse structure in text. Our work is based on the hypothesis that syntax provides a proxy for the communicative goal of a sentence and therefore the sequence of sentences in a coherent discourse should exhibit detectable structural patterns. Results show that our method has high discriminating power for separating out coherent...