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Great Lakes Restoration Initiative Action Plan

Description: This action plan articulates the most significant ecosystem problems for the Great Lakes, and describes efforts to address them. The five areas are toxic substances, invasive species, health and pollution, wildlife and habitat preservation and restoration, and finally a component that covers accountability and evaluation.
Date: February 21, 2010
Creator: United States. Council on Environmental Quality.
Item Type: Refine your search to only Text
Partner: UNT Libraries

Deepwater Horizon Response: Gulf of Mexico Oil Spill Response

Description: This website served as the focal point for the Deepwater Horizon Unified Command, a group of organizations that had involvement with the British Petroleum (BP) explosion and oil spill that occurred in the Gulf of Mexico in April 2010. The website includes news feeds and information about health concerns, volunteer opportunities, contact information, and ongoing plans for the area. Various maps of the event and other resources are also available, chronicling the problem and the steps taken by … more
Date: September 10, 2010
Creator: Deepwater Horizon Unified Command
Item Type: Refine your search to only Website
Partner: UNT Libraries Government Documents Department
open access

The Effect of Terrorism on Public Confidence : An Exploratory Study.

Description: A primary goal of terrorism is to instill a sense of fear and vulnerability in a population and to erode confidence in government and law enforcement agencies to protect citizens against future attacks. In recognition of its importance, the Department of Homeland Security includes public confidence as one of the metrics it uses to assess the consequences of terrorist attacks. Hence, several factors--including a detailed understanding of the variations in public confidence among individuals, by … more
Date: October 31, 2008
Creator: Berry, M. S.; Baldwin, T. E.; Samsa, M. E.; Ramaprasad, A. & Sciences, Decision and Information
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

DHS Regional Reachback: Rapid Expert Radiation Alarm Assistance.

Description: Following assessments that attacks with radiological and nuclear weapons are possible, detection system deployments are being supported at national and local levels. Detection systems include both, highly sensitive but non-discriminating detectors, as well as detectors and algorithms capable of distinguishing and identifying gamma rays by energy. The latter systems, usually handheld systems based on sodium iodide detectors, also provide analysis of the specific radionuclides present and are ref… more
Date: July 13, 2008
Creator: Bowerman, B.; Archer, D.; Young, J.; Monetti, M. & Savage, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Array of virtual Frisch-grid CZT detectors with common cathode readout and pulse-height correction

Description: We present our new results from testing 15-mm-long virtual Frisch-grid CdZnTe detectors with a common-cathode readout for correcting pulse-height distortions. The array employs parallelepiped-shaped CdZnTe (CZT) detectors of a large geometrical aspect ratio, with two planar contacts on the top and bottom surfaces (anode and cathode) and an additional shielding electrode on the crystal's sides to create the virtual Frisch-grid effect. We optimized the geometry of the device and improved its spec… more
Date: August 1, 2010
Creator: Bolotnikov, A. E.; Camarda, G. S.; Cui, Y.; Egarievwe, E. U.; Fochuk, P. M.; Fuerstnau, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Detector Performance of Ammonium-Sulfide-Passivated CdZnTe and CdMnTe Materials

Description: Dark currents, including those in the surface and bulk, are the leading source of electronic noise in X-ray and gamma detectors, and are responsible for degrading a detector's energy resolution. The detector material itself determines the bulk leakage current; however, the surface leakage current is controllable by depositing appropriate passivation layers. In previous research, we demonstrated the effectiveness of surface passivation in CZT (CdZnTe) and CMT (CdMnTe) materials using ammonium su… more
Date: August 1, 2010
Creator: Kim, K. H.; Bolotnikov, A. E.; Camarda, G. S.; Marchini, L.; Yang, G.; Hossain, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Thermographic analyses of the growth of Cd1-xZnxTe single crystals

Description: Bulk Cd1-xZnxTe (0<x<0.1) single crystals for gamma-ray detectors are grown mainly from near-stoichiometric melts. We discuss the influence of the thermal pre-history of the melts (superheating, thermo-cycling, and cooling rate) on various physical properties based on our thermographic analyses, electrical conductivity and viscosity measurements. Increasing the Zn content causes non-monotonic dependencies in the quality of the crystals structure.
Date: August 1, 2010
Creator: Kopach, O. V.; Bolotnikov, A.; Shcherbak, Larysa P.; Fochuk, Petro M. & James, Ralph B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Best Practices for the Security of Radioactive Materials

Description: This work is funded under a grant provided by the US Department of Health and Human Services, Centers for Disease Control. The Department of Health and Mental Hygiene (DOHMH) awarded a contract to Brookhaven National Laboratory (BNL) to develop best practices guidance for Office of Radiological Health (ORH) licensees to increase on-site security to deter and prevent theft of radioactive materials (RAM). The purpose of this document is to describe best practices available to manage the security … more
Date: May 1, 2009
Creator: Coulter, D. T. & Musolino, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The New York City Urban Dispersion Program March 2005 Field Study: Tracer Methods and Results.

Description: The Urban Dispersion Program March 2005 Field Study tracer releases, sampling, and analytical methods are described in detail. There were two days where tracer releases and sampling were conducted. A total of 16.0 g of six tracers were released during the first test day or Intensive Observation Period (IOP) 1 and 15.7 g during IOP 2. Three types of sampling instruments were used in this study. Sequential air samplers, or SAS, collected six-minute samples, while Brookhaven atmospheric tracer sam… more
Date: October 1, 2005
Creator: Watson, T. B.; Heiser, J.; Kalb, P.; Dietz, R. N.; Wilke, R.; Wieser, R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The New York Midtown Dispersion Study (Mid-05) Meteorological Data Report.

Description: The New York City midtown dispersion program, MID05, examined atmospheric transport in the deep urban canyons near Rockefeller Center. Little is known about air flow and hazardous gas dispersion under such conditions, since previous urban field experiments have focused on small to medium sized cities with much smaller street canyons and examined response over a much larger area. During August, 2005, a series of six gas tracer tests were conducted and sampling was conducted over a 2 km grid. A c… more
Date: January 1, 2007
Creator: Reynolds, R. M.; Sullivan, T. M.; Smith, S. & Cassella, V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

[Deepwater Horizon Response and Trial Websites]

Description: Websites related to the Deepwater Horizon oil spill, recovery efforts, and trial. It includes sites established to document corporate and governmental actions to clean up the Gulf of Mexico after the oil spill in 2010, and ongoing efforts to restore ecosystems in the region as well as documentation related to the civil action filed against BP and the subsequent trial.
Date: 2010/2017
Creator: Deepwater Horizon Unified Command
Item Type: Refine your search to only Website
Partner: UNT Libraries Government Documents Department
open access

Analyzing Enron Data: Bitmap Indexing Outperforms MySQL Queries bySeveral Orders of Magnitude

Description: FastBit is an efficient, compressed bitmap indexing technology that was developed in our group. In this report we evaluate the performance of MySQL and FastBit for analyzing the email traffic of the Enron dataset. The first finding shows that materializing the join results of several tables significantly improves the query performance. The second finding shows that FastBit outperforms MySQL by several orders of magnitude.
Date: January 28, 2006
Creator: Stockinger, Kurt; Rotem, Doron; Shoshani, Arie & Wu, Kesheng
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Multiphase imaging of gas flow in a nanoporous material usingremote detection NMR

Description: Pore structure and connectivity determine how microstructured materials perform in applications such as catalysis, fluid storage and transport, filtering, or as reactors. We report a model study on silica aerogel using a recently introduced time-of-flight (TOF) magnetic resonance imaging technique to characterize the flow field and elucidate the effects of heterogeneities in the pore structure on gas flow and dispersion with Xe-129 as the gas-phase sensor. The observed chemical shift allows the… more
Date: October 3, 2005
Creator: Harel, Elad; Granwehr, Josef; Seeley, Juliette A. & Pines, Alex
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

DHS Climate Action Plan: Addendum

Description: This report discusses the action plan for the Department of Homeland Security related to climate change. It stats that "as a result of the uncertainties associated with climate change affects, historically successful strategies for managing resources and infrastructure will become less effective over time, requiring new paradigms, policies and procedures".
Date: June 2014
Creator: United States. Department of Homeland Security.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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