Ceramic Sensors for Wireless High-Temperature Sensing

A RF resonator for sensing a physical or environmental parameter includes a substrate having a substrate surface. A polymer-derived ceramic (PDC) element is positioned on or within the substrate surface. The RF resonator has a resonant frequency that changes as a function of the physical or environmental parameter. A system for wirelessely sensing at least one physical or environmental parameter includes at least one RF resonator and a wireless RF reader located remotely from the RF resonator first transmitting a wide-band RF interrogation signal that excites the RF resonator. The wireless RF reader detects a sensing signal retransmitted by the RF resonator and includes a processor for determining the physical or environmental parameter at the location of the RF resonator from the sensing signal

Environmental Parameter Effects on the Fate of a Chemical Slick

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Stochastic modeling of the grading pattern in presence of the environmental parameter

This paper deals with the stochastic modeling of grading pattern, where grades are supposed to be influenced by environmental parameter c (say), (0 ≤ c ≤ 1). The model discussed here is an extension of Wang’s model (1981). The correlation coefficient between the two consecutive states is showed to be a function of the environmental parameter ‘c’. The operating characteristics namely first passage time distributions, mean waiting time in a particular grade are obtained. Also Numerical examples are worked out to study the limiting behavior of the change

Disentangling galaxy environment and host halo mass

[Abridged] The properties of observed galaxies and dark matter haloes in simulations depend on their environment. The term environment has been used to describe a wide variety of measures that may or may not correlate with each other. Popular measures of environment include the distance to the N'th nearest neighbour, the number density of objects within some distance, or the mass of the host dark matter halo. We use results from the Millennium simulation and a semi-analytic model for galaxy formation to quantify the relations between environment and halo mass. We show that the environmental parameters used in the observational literature are in effect measures of halo mass, even if they are measured for a fixed stellar mass. The strongest correlation between environment and halo mass arises when the number of objects is counted out to a distance of 1.5-2 times the virial radius of the host halo and when the galaxies/haloes are required to be relatively bright/massive. For observational studies the virial radius is not easily determined, but the number of neighbours out to 1-2 Mpc/h gives a similarly strong correlation. For the distance to the N'th nearest neighbour the correlation with halo mass is nearly as strong provided N>2. We demonstrate that this environmental parameter becomes insensitive to halo mass if it is constructed from dimensionless quantities. This can be achieved by scaling the minimum luminosity/mass of neighbours to that of the object in question and by dividing the distance to a length scale associated with either the neighbour or the galaxy under consideration. We show how such a halo mass independent environmental parameter can be defined for observational and numerical studies. The results presented here will help future studies to disentangle the effects of halo mass and external environment on the properties of galaxies and dark matter haloes.Comment: 15 pages, 9 figures, 2 tables. Accepted by MNRA

Quantitative suspended sediment mapping using aircraft remotely sensed multispectral data

Suspended sediment is an important environmental parameter for monitoring water quality, water movement, and land use. Quantitative suspended sediment determinations were made from analysis of aircraft remotely sensed multispectral digital data. A statistical analysis and derived regression equation were used to determine and plot quantitative suspended sediment concentration contours in the tidal James River, Virginia, on May 28, 1974. From the analysis, a single band, Band 8 (0.70-0.74 microns), was adequate for determining suspended sediment concentrations. A correlation coefficient of 0.89 was obtained with a mean inaccuracy of 23.5 percent for suspended sediment concentrations up to about 50 mg/l. Other water quality parameters - secchi disc depth and chlorophyll - also had high correlations with the remotely sensed data. Particle size distribution had only a fair correlation with the remotely sensed data

In Combination of WSN and GSM for Long Distance Sensor Monitoring and Parameter Control

This paper presents environmental monitoring and parameters controlling system based on GSM and ZIGBEE technology. As sensor network consist of several sensor which are smaller in size, cost of this nodes is less, in which it collects and distributes the environmental sensed data using ZIGBEE. The received data is identified, displayed at the coordinator node using ZIGBEE and then it is transmits data to the android smart phone through GSM (Global System for Mobile Communication) module for controlling actions This design is considers various applications, where sensed environmental parameter value are generally collected at an intermediate node which in turn redirects the environmental parameter value to mobile using GSM technology. The objective of the work is to simplify the method using android smart phone