Differences in electromagnetic path delay, between direct Global Positioning System (GPS) signals and those reflected from the surface of Crater Lake, have led to lake surface height estimates with 2-cm precision in 1 second. This is the first high-precision altimetric demonstration with GPS from sufficient altitude (≈ 480 m) to probe fundamental experimental errors, which bear on future airand...

This paper outlines the progress made on the use of subcarrier multiplexing (SCM) for high-speed datacommunications links over multimode fiber. Results include the demonstration of penalty-free transmission of 2.5 Gb/s data over worst case multimode fiber (MMF). A complete link demonstration of an SCM transmission system is reported, based on a quadrature phase-shift keying modulator and demodu...

Background: Melorheostosis has been discussed infrequently in the nuclear medicine literature. A 25-year-old female patient presented with a one-year history of b:union: pain, sclerotic change and skin pigmentation on the left big toe interphalangeal joint. Ulceration, poor healing and hyperkeratoses of the wound were noted post debridement. The plain film of the left foot incidentally showed m...

Small farms and smallholder farming systems play crucial roles in agricultural development in many developing countries. From the various rural development programs designed to support such farming systems, agricultural extension services are of at most importance. However, the benefit that farmers obtain from these services and the resulting impact depends, to a great extent, by their direct a...

the investigation and determination of the significance of neovascularization in the progression of soft tissue sarcoma is currently of increasing clinical importance. microvessel density is the morphologic evidence of neoangiogenesis in the process of malignant progression of sarcomata. this brief review of the markers commonly used in clinical practice was undertaken to determine the validity...

Immunohistochemical demonstration of tumor-associated markers may be valuable as an adjunct to conventional histology for determination of malignancy development in oral mucosal diseases. Accordingly, the present study determined the distribution of some important tumor markers such as heat shock proteins (HSP), fibroblast growth factors (FGF) and transferrin receptors (TF-R) in 22 samples ...

Conventional optical synthesis, the manipulation of phase and amplitude spectral components to produce an pulse in different temporal modes, is revolutionizing ultrafast science metrology. These technologies rely on Fourier transform light fields between time frequency domains one-dimensional space. However, within this treatment it impossible incorporate quantum correlation among photons. Here...

The XPath accelerator (“pre/post numbering”) has proven to be an efficient encoding to losslessly store XML data in relational databases. Conventional RDBMSs, however, remain ignorant of interesting properties of the encoded tree data, and make thus no or poor use of these properties. At VLDB 2003 we devised a new join algorithm, staircase join, that encapsulates tree-specific knowledge and can...

Perforation of a hollow viscus is an acute abdominal drama and the accurate diagnosis highly depends on demonstration of free intra­pritoneal air. The importance of adequate examination in the demonstration of ,tiny amount ()ff air is stressed and the value of an upright chest film when the horizontal beam is tangential to the top of the diaphragm is mentioned. Before standing for chest x-ray t...