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Search for Dark Matter Satellites Using the FERMI-LAT (open access)

Search for Dark Matter Satellites Using the FERMI-LAT

Numerical simulations based on the {Lambda}CDM model of cosmology predict a large number of as yet unobserved Galactic dark matter satellites. We report the results of a Large Area Telescope (LAT) search for these satellites via the {gamma}-ray emission expected from the annihilation of weakly interacting massive particle (WIMP) dark matter. Some dark matter satellites are expected to have hard {gamma}-ray spectra, finite angular extents, and a lack of counterparts at other wavelengths. We sought to identify LAT sources with these characteristics, focusing on {gamma}-ray spectra consistent with WIMP annihilation through the b{bar b} channel. We found no viable dark matter satellite candidates using one year of data, and we present a framework for interpreting this result in the context of numerical simulations to constrain the velocity-averaged annihilation cross section for a conventional 100 GeV WIMP annihilating through the b{bar b} channel.
Date: August 16, 2012
Creator: Ackermann, M.; Albert, A.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D. et al.
Object Type: Article
System: The UNT Digital Library
2d Affine XY-Spin Model/4d Gauge Theory Duality and Deconfinement (open access)

2d Affine XY-Spin Model/4d Gauge Theory Duality and Deconfinement

We introduce a duality between two-dimensional XY-spin models with symmetry-breaking perturbations and certain four-dimensional SU(2) and SU(2) = Z{sub 2} gauge theories, compactified on a small spatial circle R{sup 1,2} x S{sup 1}, and considered at temperatures near the deconfinement transition. In a Euclidean set up, the theory is defined on R{sup 2} x T{sup 2}. Similarly, thermal gauge theories of higher rank are dual to new families of 'affine' XY-spin models with perturbations. For rank two, these are related to models used to describe the melting of a 2d crystal with a triangular lattice. The connection is made through a multi-component electric-magnetic Coulomb gas representation for both systems. Perturbations in the spin system map to topological defects in the gauge theory, such as monopole-instantons or magnetic bions, and the vortices in the spin system map to the electrically charged W-bosons in field theory (or vice versa, depending on the duality frame). The duality permits one to use the two-dimensional technology of spin systems to study the thermal deconfinement and discrete chiral transitions in four-dimensional SU(N{sub c}) gauge theories with n{sub f} {ge} 1 adjoint Weyl fermions.
Date: August 16, 2012
Creator: Anber, Mohamed M.; Poppitz, Erich; U., /Toronto; Unsal, Mithat & /SLAC /Stanford U., Phys. Dept. /San Francisco State U.
Object Type: Article
System: The UNT Digital Library
Crisis In Mali (open access)

Crisis In Mali

This report discusses the West African country of Mali that faces multiple overlapping crises. The country’s political leadership has been uncertain and disputed since a military coup on March 22, 2012, overthrew a democratically elected government in the capital, Bamako.
Date: August 16, 2012
Creator: Arieff, Alexis & Johnson, Kelly
Object Type: Report
System: The UNT Digital Library
Blinn College Requests for Legislative Appropriations: Fiscal Years 2014 and 2015 (open access)

Blinn College Requests for Legislative Appropriations: Fiscal Years 2014 and 2015

Report submitted by Blinn College containing background information on the commission, and summaries of requests for appropriations and expenditures for the fiscal years 2014 and 2015 with supporting documentation.
Date: August 16, 2012
Creator: Blinn College
Object Type: Book
System: The Portal to Texas History
The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, August 16, 2012 (open access)

The Express-Star (Chickasha, Okla.), Ed. 1 Thursday, August 16, 2012

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date: August 16, 2012
Creator: Bright, James
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Canadian Record (Canadian, Tex.), Vol. 122, No. 33, Ed. 1 Thursday, August 16, 2012 (open access)

The Canadian Record (Canadian, Tex.), Vol. 122, No. 33, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Canadian, Texas that includes local, state and national news along with some advertising.
Date: August 16, 2012
Creator: Brown, Laurie Ezzell
Object Type: Newspaper
System: The Portal to Texas History
The Altus Times (Altus, Okla.), Vol. 113, No. 55, Ed. 1 Thursday, August 16, 2012 (open access)

The Altus Times (Altus, Okla.), Vol. 113, No. 55, Ed. 1 Thursday, August 16, 2012

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date: August 16, 2012
Creator: Bush, Michael
Object Type: Newspaper
System: The Gateway to Oklahoma History
Mount Vernon Optic-Herald (Mount Vernon, Tex.), Vol. 139, No. 3, Ed. 1 Thursday, August 16, 2012 (open access)

Mount Vernon Optic-Herald (Mount Vernon, Tex.), Vol. 139, No. 3, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Mount Vernon, Texas that includes local, state and national news along with advertising.
Date: August 16, 2012
Creator: Bush-Reves, Lillie
Object Type: Newspaper
System: The Portal to Texas History
The Monitor (Mabank, Tex.), Vol. 39, No. 1, Ed. 1 Thursday, August 16, 2012 (open access)

The Monitor (Mabank, Tex.), Vol. 39, No. 1, Ed. 1 Thursday, August 16, 2012

Semi-weekly newspaper from Mabank, Texas that includes local Cedar Creek Lake area, state and national news along with extensive advertising.
Date: August 16, 2012
Creator: Cantrell, Pearl
Object Type: Newspaper
System: The Portal to Texas History
Collin County Community College District Requests for Legislative Appropriations: Fiscal Years 2014 and 2015 (open access)

Collin County Community College District Requests for Legislative Appropriations: Fiscal Years 2014 and 2015

Report submitted by the Collin County Community College District containing summaries of requests for appropriations and expenditures for the fiscal years 2014 and 2015 with supporting documentation.
Date: August 16, 2012
Creator: Collin County Community College District
Object Type: Book
System: The Portal to Texas History
The Naples Monitor (Naples, Tex.), Vol. 126, No. 27, Ed. 1 Thursday, August 16, 2012 (open access)

The Naples Monitor (Naples, Tex.), Vol. 126, No. 27, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Naples, Texas that includes local, state and national news along with advertising.
Date: August 16, 2012
Creator: Craig, Morris
Object Type: Newspaper
System: The Portal to Texas History
Brownwood Bulletin (Brownwood, Tex.), Vol. 112, No. 262, Ed. 1 Thursday, August 16, 2012 (open access)

Brownwood Bulletin (Brownwood, Tex.), Vol. 112, No. 262, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Brownwood, Texas that includes local, state and national news along with advertising.
Date: August 16, 2012
Creator: Deason, Gene
Object Type: Newspaper
System: The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 98, No. 2, Ed. 1 Thursday, August 16, 2012 (open access)

The Oklahoma Daily (Norman, Okla.), Vol. 98, No. 2, Ed. 1 Thursday, August 16, 2012

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date: August 16, 2012
Creator: Ellisor, Laney
Object Type: Newspaper
System: The Gateway to Oklahoma History
A Fisheye Lens as a Photonic Doppler Velocimetry Probe (open access)

A Fisheye Lens as a Photonic Doppler Velocimetry Probe

These presentation visuals report an instrument that, by use of a fish-eye lens, generates a beat signal using fiber mixing of unshifted light with Doppler-shifted light and measures the beat frequency. Ray trace diagrams are shown to illustrate advantages and disadvantages. The authors find their instrument has a long tracking distance, and large angle coverage. Index matching eases assembly, reduces return loss and flattens the field.
Date: August 16, 2012
Creator: Frogget, B. C.
Object Type: Article
System: The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 97, No. 237, Ed. 1 Thursday, August 16, 2012 (open access)

Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 97, No. 237, Ed. 1 Thursday, August 16, 2012

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date: August 16, 2012
Creator: Gibbs, Angenene
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 92, No. 163, Ed. 1 Thursday, August 16, 2012 (open access)

The Baytown Sun (Baytown, Tex.), Vol. 92, No. 163, Ed. 1 Thursday, August 16, 2012

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date: August 16, 2012
Creator: Gray, Janie
Object Type: Newspaper
System: The Portal to Texas History
Valley Mills Progress (Valley Mills, Tex.), Vol. 23, No. 19, Ed. 1 Thursday, August 16, 2012 (open access)

Valley Mills Progress (Valley Mills, Tex.), Vol. 23, No. 19, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Valley Mills, Texas that includes local, state, and national news along with advertising.
Date: August 16, 2012
Creator: Grear, Mark
Object Type: Newspaper
System: The Portal to Texas History
Crowley Star (Crowley, Tex.), Vol. 26, No. 15, Ed. 1 Thursday, August 16, 2012 (open access)

Crowley Star (Crowley, Tex.), Vol. 26, No. 15, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Crowley, Texas that includes local, state, and national news along with advertising.
Date: August 16, 2012
Creator: Hinton, Jay
Object Type: Newspaper
System: The Portal to Texas History
Garber Billings News (Garber, Okla.), Vol. 112, No. 42, Ed. 1 Thursday, August 16, 2012 (open access)

Garber Billings News (Garber, Okla.), Vol. 112, No. 42, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Garber, Oklahoma that includes local, state, and national news along with advertising.
Date: August 16, 2012
Creator: Hogan, Vickie Lee
Object Type: Newspaper
System: The Gateway to Oklahoma History
The Swisher County News (Tulia, Tex.), Vol. 4, No. 33, Ed. 1 Thursday, August 16, 2012 (open access)

The Swisher County News (Tulia, Tex.), Vol. 4, No. 33, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Tulia, Texas that includes local, state, and national news along with extensive advertising.
Date: August 16, 2012
Creator: Hooten, Patsy & Armbruster, Kerm
Object Type: Newspaper
System: The Portal to Texas History
Port Aransas South Jetty (Port Aransas, Tex.), Vol. 41, No. 33, Ed. 1 Thursday, August 16, 2012 (open access)

Port Aransas South Jetty (Port Aransas, Tex.), Vol. 41, No. 33, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with extensive advertising.
Date: August 16, 2012
Creator: Judson, Mary Henkel
Object Type: Newspaper
System: The Portal to Texas History
Lead-Free Definition Under the Safe Drinking Water Act (open access)

Lead-Free Definition Under the Safe Drinking Water Act

This report provides details on the then-current Safe Drinking Water Act (SDWA) Section 1417 requirements as well as amendments to the Reduction of Lead in Drinking Water Act.
Date: August 16, 2012
Creator: Kempic, Jeffrey
Object Type: Text
System: The UNT Digital Library
De Leon Free Press (De Leon, Tex.), Vol. 123, No. 8, Ed. 1 Thursday, August 16, 2012 (open access)

De Leon Free Press (De Leon, Tex.), Vol. 123, No. 8, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from De Leon, Texas that includes local, state and national news along with advertising.
Date: August 16, 2012
Creator: Kestner, Laura
Object Type: Newspaper
System: The Portal to Texas History
The Olney Enterprise (Olney, Tex.), Vol. 104, No. 24, Ed. 1 Thursday, August 16, 2012 (open access)

The Olney Enterprise (Olney, Tex.), Vol. 104, No. 24, Ed. 1 Thursday, August 16, 2012

Weekly newspaper from Olney, Texas that includes local, state, and national news along with advertising.
Date: August 16, 2012
Creator: Kimbro, Mindi
Object Type: Newspaper
System: The Portal to Texas History