The demand for Wireless Sensor Networks is increasing day by because of their diverse nature. Due to the limited energy, it a complex task retract sensor node after deployment. So, there requirement network maintainability before deployment phase its smooth working. It achieved in three phases: hardware node, communication and external environmental phase. This paper focuses on A novel framewor...

Abstract In this study, modeling of discharge was performed in compound open channels with non-prismatic floodplains (CCNPF) using soft computation models including multivariate adaptive regression splines (MARS) and group method data handling (GMDH), then their results were compared the multilayer perceptron neural networks (MLPNN). addition to total discharge, separation between floodplain ma...

The aim of this study was to obtain a predictive model able to perform an early detection of central segregation severity in continuous cast steel slabs. Segregation in steel cast products is an internal defect that can be very harmful when slabs are rolled in heavy plate mills. In this research work, the central segregation was studied with success using the data mining methodology based on mu...

We report 32 GHz absolute flux density measurements of the supernova remnant Cas A, with an accuracy of 2.4%. The measurements were made with the 1.5-meter telescope at the Owens Valley Radio Observatory. The antenna gain had been measured by NIST in May 1990 to be 0.505 ± 0.007 Jy . Our observations of Cas A in May 1998 yield Scas,1998 = 194.0 ± 4.7 Jy. We also report absolute flux density mea...

In 1996, NASA will launch the Mars Pathfinder spacecraft, which will carry an 11 kg rover to explore the immediate vicinity of the lander. To assess the capabilities of the rover, we have constructed a new microrover testbed consisting of the Rocky 3.2 vehicle and an indoor test arena containing Mars analog terrain and overhead cameras for automatic, real-time tracking of the true rover positio...

Introduction: Recent explorations on the Martian surface have revealed an environment far more dynamic than previously believed. In particular, the atmosphere of Mars is very dynamic. Dust devils and clouds are dynamic atmospheric features that have been observed by the Mars Exploration Rovers (MER). These high science value events have been the subject of considerable study. Both dust devil an...

This paper provides an overview of a new manipulation system developed for sampling and instrument placement from small autonomous mobile robots for Mars exploration. Selected out of the design space, two manipulators have been constructed and integrated into the Rocky 7 Mars rover prototype. This paper describes the design objectives and constraints for these manipulators, and presents the fin...

National Institute of Standards and Technology, Gaithersburg, MD 20899-0001 In 1997, the National Institute of Standards and Technology (NIST) initiated a process to select a symmetric-key encryption algorithm to be used to protect sensitive (unclassified) Federal information in furtherance of NIST’s statutory responsibilities. In 1998, NIST announced the acceptance of 15 candidate algorithms a...