Spin Block Research Articles

Spin-block synchronization algorithm in the shared memory multiprocessor system

Implemmentation of efficient synchronization algorithm is imporant in the parallel processing computer. Everyone usually say that implementation of synchronization in the parallel processing computer is a necessary evil. That is, synchronization in the parallel processing computer is positively necessary when user access shared resources in the computer system. But using of the wrong synchronization algorithm makes to many troubles in the parallel processing computer. In this paper proposed new algorithm of spin-block synchronization algorithm with multiprocessor system. This is based on type of queue lock and block lock. In this paper's queue lock is modified queue lock. So this type of new lock algorithm is spin-block algorithm. The Spin-Block synchronization algorithm's performance is evaluated by statistical analysis. The Spin-Block lock algorithm is alternative possibility to spin lock or block if any case in system overload. Finally, this algorithm is evaluated by performance model among traditional other lock algorithm. In this experiment we concluded that Spin-Block lock algorithm is good response time among other traditional lock algorithms.

GREEN'S FUNCTION APPROACH TO 3-DIMENSIONAL ISING MODEL

With the Green's function tequnique, we have exactly dealed with 3-dimesional lsing model, and obtained the linear equations of the ensemble average of the spin which are able TO be recurrent. Then by applying the decoupling approximation to the spin blocks, we can transform the solution of the transition temperature, magnetization and so on into the solution of algebraic equations. We have shown that for the smaller spin block we can obtain the results with higher precision.

Direct observation of critical fluctuations

By performing careful observations very near the critical point of binary fluids or microemulsions using optical microscopy it is possible to obtain a resolution of the order of the correlation length and observe fluctuations in the order parameter (concentration). The origin of these fluctuations is discussed by comparing the picture element to a spin block variable within 3D Ising model. It follows that the free energy of the configuration can be obtained from the histogram of the fluctuation amplitudes. Black and white domains can be defined by clipping these fluctuations relative to a mean value. Domains are seen to be self-similar in shape, with a fractal dimension of 2.8. The origin of this self-similarity is discussed and a possible relation with percolation model is envisaged.

Rescaled occupation number representation and the λ-transition

The λ-transition is analyzed in the framework of quantum statistical mechanics without invoking the idea of universality. Wilson's renormalization group transformation technique is applied in what we call the rescaled occupation number representation (RONR). This reveals the role that the Bose commutation rules and the Bose distribution function play in shaping the critical behavior. The idea of RONR is a quantu, analogue of Kadanoff's spin block picture and may be adapted for condensed fermion systems as well. It is shown that the critical behavior of the λ-transition is the same as that of the ferromagnetic phase transition in two component classical spin systems to all orders of ε = 4− d. This paper deals only with the temperature region T #62 T c.