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    Seals Research at Texas A/M University

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    The Turbomachinery Laboratory at Texas A&M has been providing experimental data and computational codes for the design seals for many years. The program began with the development of a Halon based seal test rig. This facility provided information about the effective stiffness and damping in whirling seals. The Halon effectively simulated cryogenic fluids. Another test facility was developed (using air as the working fluid) where the stiffness and damping matrices can be determined. This data was used to develop bulk flow models of the seal's effect upon rotating machinery; in conjunction with this research, a bulk flow model for calculation of performance and rotordynamic coefficients of annular pressure seals of arbitrary non-uniform clearance for barotropic fluids such as LH2, LOX, LN2, and CH4 was developed. This program is very efficient (fast) and converges for very large eccentricities. Currently, work is being performed on a bulk flow analysis of the effects of the impeller-shroud interaction upon the stability of pumps. The data was used along with data from other researchers to develop an empirical leakage prediction code for MSFC. Presently, the flow field inside labyrinth and annular seals are being studied in detail. An advanced 3-D Doppler anemometer system is being used to measure the mean velocity and entire Reynolds stress tensor distribution throughout the seals. Concentric and statically eccentric seals were studied; presently, whirling seals are being studied. The data obtained are providing valuable information about the flow phenomena occurring inside the seals, as well as a data base for comparison with numerical predictions and for turbulence model development. A finite difference computer code was developed for solving the Reynolds averaged Navier Stokes equation inside labyrinth seals. A multi-scale k-epsilon turbulence model is currently being evaluated. A new seal geometry was designed and patented using a computer code. A large scale, 2-D seal flow visualization facility is also being developed

    Simulation of a Texas Hold'Em poker player

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    Copyright 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. This is the accepted version of the article. The published version is available at

    Why did Texas have a jobless recovery?

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    Employment ; Immigrants ; Labor market

    Texas A&M University at Galveston

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    Located in Galveston, Texas, the Marine Science Department offers several undergraduate degree programs and a graduate degree program in marine resources management. The department also conducts cutting edge research in oceanography, theory, and marine policy. Site offers curriculum and admissions information, as well as all the latest news and events, and photos of the lab and students doing research. Educational levels: Graduate or professional, Undergraduate lower division, Undergraduate upper division

    TEXAS TAXES: A COMPARISON WITH OTHER STATES

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    This document is part of an educational series on Texas taxes. State and local taxes in Texas are compared with those of the fifty states and the District of Columbia. Taxes are compared per capita and per 1,000ofpersonalincome.Thetaxesinclude:allstateandlocaltaxes,propertytaxes,salesandgrossreceiptstaxes,personalincometaxes,corporateincometaxesandcorporatefranchisetaxes.Foreachtaxthenationalaverage,median,maximumandminimumaregivenalongwiththecorrespondingtaxforTexasandTexassranknationally.Texasstaterevenuecomesprimarilyfromthesalestaxandlocalrevenuefromthepropertytax.Itisoneofonlyfourstateswithneitheracorporatenorapersonalincometax.Forallstateandlocaltaxes,Texasranks35thpercapitaand40thper1,000 of personal income. The taxes include: all state and local taxes, property taxes, sales and gross receipts taxes, personal income taxes, corporate income taxes and corporate franchise taxes. For each tax the national average, median, maximum and minimum are given along with the corresponding tax for Texas and Texas's rank nationally. Texas state revenue comes primarily from the sales tax and local revenue from the property tax. It is one of only four states with neither a corporate nor a personal income tax. For all state and local taxes, Texas ranks 35th per capita and 40th per 1,000 of personal income. Despite this relatively low rank among all states, tax reform is a continuing priority issue in Texas. The reason for this may be the heavy reliance on sales and property taxes to support state and local governmental services. While the overall tax burden is relatively low, the burden of these two taxes ranks relatively high and may disadvantage certain industries.Public Economics,
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