In this paper, a novel greyscale image coding technique based on vector quantization (VQ) is proposed. In VQ, the recon− structed image quality is restricted by the codebook used in the image encoding/decoding procedures. To provide a better image quality using a fixed−sized codebook, the codebook expansion technique is introduced in the proposed technique. In addition, the block prediction tec...

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During inflation quantum effects from massless, minimally coupled scalars and gravitons can be strengthened so much that perturbation theory breaks down. To follow the subsequent evolution one must employ a nonperturbative resummation. Starobinskĭı has developed such a technique for simple scalar theories. I discuss recent progress in applying this technique to more complicated models.

The triple test is a second trimester screening test used to identify those pregnant women who should be offered a diagnostic test to identify whether their fetus has an aneuploidy. It was first described in 1988, but has largely been superseded by newer tests either conducted earlier in the first trimester (ie, the combined test, using ultrasound measurement of nuchal translucency, pregnancy-a...

We propose and demonstrate a spatial version of the cavity ring-down concept in which a photon flux decay is displayed along the spatial coordinate at the exit of a plane Fabry–Perot cavity. The photon decay signals are simulated based on a simple theoretical model combining ray optics and diffraction involved in the spatial ring-down generation, which are found to be in good accordance with th...

We propose a zero copy message transfer with a pin-down cache technique which reuses the pinned-down area to decrease the number of calls to pin-down and release primitives. The proposed facility has been implemented in the PM low-level communication library on our PC cluster, consisting of 32 Pentium 166 Mhz CPU's connected by a Myricom Myrinet network, and running NetBSD. The PM achieves 113....

Purpose: Tracheo esophageal fistula repair are usually complicated by the development of anastomotic leaks and strictures. The technique of anastomosis has long been a matter of debate. The most common method has been transverse circular esophageal anastomosis. We aim to bring down the frequency of early complications associated with conventional technique of esophageal repair by introduction o...

Purpose: Tracheo esophageal fistula repair are usually complicated by the development of anastomotic leaks and strictures. The technique of anastomosis has long been a matter of debate. The most common method has been transverse circular esophageal anastomosis. We aim to bring down the frequency of early complications associated with conventional technique of esophageal repair by introduction o...