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Partition Coefficients of Organic Compounds in Four New Tetraalkylammonium Bis(trifluoromethylsulfonyl)imide Ionic Liquids Using Inverse Gas Chromatography
This article discusses partition coefficients of organic compounds in four new tetraalkylammonium bis(trifluoromethylsulfonyl)imide ionic liquids using inverse gas chromatography.
Date:
August 18, 2011
Creator:
Acree, William E. (William Eugene); Baker, Gary A.; Mutelet, Fabrice & Moïse, Jean-Charles
Object Type:
Article
System:
The UNT Digital Library
The evolution of ion charge states in cathodic vacuum arc plasmas: a review
Cathodic vacuum arc plasmas are known to contain multiply charged ions. 20 years after “Pressure Ionization: its role in metal vapour vacuum arc plasmas and ion sources” appeared in vol. 1 of Plasma Sources Science and Technology, it is a great opportunity to re-visit the issue of pressure ionization, a non-ideal plasma effect, and put it in perspective to the many other factors that influence observable charge state distributions, such as the role of the cathode material, the path in the density-temperature phase diagram, the “noise” in vacuum arc plasma as described by a fractal model approach, the effects of external magnetic fields and charge exchange collisions with neutrals. A much more complex image of the vacuum arc plasma emerges putting decades of experimentation and modeling in perspective.
Date:
December 18, 2011
Creator:
Anders, Andre
Object Type:
Article
System:
The UNT Digital Library
The SEMATECH Berkeley MET: extending EUV learning to 16-nm half pitch
Several high-performing resists identified in the past two years have been exposed at the 0.3-numerical-aperture (NA) SEMATECH Berkeley Microfield Exposure Tool (BMET) with an engineered dipole illumination optimized for 18-nm half pitch. Five chemically amplified platforms were found to support 20-nm dense patterning at a film thickness of approximately 45 nm. At 19-nm half pitch, however, scattered bridging kept all of these resists from cleanly resolving larger areas of dense features. At 18-nm half pitch, none of the resists were are able to cleanly resolve a single line within a bulk pattern. With this same illumination a directly imageable metal oxide hardmask showed excellent performance from 22-nm half pitch to 17-nm half pitch, and good performance at 16-nm half pitch, closely following the predicted aerial image contrast. This indicates that observed limitations of the chemically amplified resists are indeed coming from the resist and not from a shortcoming of the exposure tool. The imageable hardmask was also exposed using a Pseudo Phase-Shift-Mask technique and achieved clean printing of 15-nm half pitch lines and modulation all the way down to the theoretical 12.5-nm resolution limit of the 0.3-NA SEMATECH BMET.
Date:
March 18, 2011
Creator:
Anderson, Christopher N.; Baclea-an, Lorie Mae; Denham, Paul E.; George, Simi; Goldberg, Kenneth A.; Jones, Michael et al.
Object Type:
Article
System:
The UNT Digital Library
Magnetic Measurement Results of the LCLS Undulator Quadrupoles
This note details the magnetic measurements and the magnetic center fiducializations that were performed on all of the thirty-six LCLS undulator quadrupoles. Temperature rise, standardization reproducibility, vacuum chamber effects and magnetic center reproducibility measurements are also presented. The Linac Coherent Light Source (LCLS) undulator beam line has 33 girders, each with a LCLS undulator quadrupole which focuses and steers the beam through the beam line. Each quadrupole has main quadrupole coils, as well as separate horizontal and vertical trim coils. Thirty-six quadrupoles, thirty-three installed and three spares were, manufactured for the LCLS undulator system and all were measured to confirm that they met requirement specifications for integrated gradient, harmonics and for magnetic center shifts after current changes. The horizontal and vertical dipole trims of each quadrupole were similarly characterized. Each quadrupole was also fiducialized to its magnetic center. All characterizing measurements on the undulator quads were performed with their mirror plates on and after a standardization of three cycles from -6 to +6 to -6 amps. Since the undulator quadrupoles could be used as a focusing or defocusing magnet depending on their location, all quadrupoles were characterized as focusing and as defocusing quadrupoles. A subset of the undulator quadrupoles were …
Date:
August 18, 2011
Creator:
Anderson, Scott; Caban, Keith; Nuhn, Heinz-Dieter; Reese, Ed & Wolf, Zachary
Object Type:
Report
System:
The UNT Digital Library
A Framework for Incorporating General Domain Knowledge into Latent Dirichlet Allocation using First-Order Logic
Topic models have been used successfully for a variety of problems, often in the form of application-specific extensions of the basic Latent Dirichlet Allocation (LDA) model. Because deriving these new models in order to encode domain knowledge can be difficult and time-consuming, we propose the Fold-all model, which allows the user to specify general domain knowledge in First-Order Logic (FOL). However, combining topic modeling with FOL can result in inference problems beyond the capabilities of existing techniques. We have therefore developed a scalable inference technique using stochastic gradient descent which may also be useful to the Markov Logic Network (MLN) research community. Experiments demonstrate the expressive power of Fold-all, as well as the scalability of our proposed inference method.
Date:
January 18, 2011
Creator:
Andrzejewski, D.; Zhu, X.; Craven, M. & Recht, B.
Object Type:
Article
System:
The UNT Digital Library
Angelo State University Annual Financial Report: 2011
Annual financial report of Angelo State University for fiscal year 2012 providing statements of assets, revenues, expenses, bond information, and other relevant data.
Date:
November 18, 2011
Creator:
Angelo State University
Object Type:
Report
System:
The Portal to Texas History
LIFE Delivery Plan
None
Date:
April 18, 2011
Creator:
Anklam, T M
Object Type:
Report
System:
The UNT Digital Library
Northern Ireland: The Peace Process
For years, the British and Irish governments sought to facilitate a peaceful settlement to the conflict in Northern Ireland. This report provides a brief overview of the continuing peace talks and efforts in Northern Ireland, including the deal reached in February 2010 between the Democratic Unionist Party (DUP) and Sinn Fein, the political wing of the Irish Republican Army (IRA). The report also discusses the United States' active support of the Northern Ireland peace process, including the future of the International Fund for Ireland (IFI).
Date:
February 18, 2011
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
Northern Ireland: The Peace Process
For years, the British and Irish governments sought to facilitate a peaceful settlement to the conflict in Northern Ireland. This report provides a brief overview of the continuing peace talks and efforts in Northern Ireland, including the deal reached in February 2010 between the Democratic Unionist Party (DUP) and Sinn Fein, the political wing of the Irish Republican Army (IRA). The report also discusses the United States' active support of the Northern Ireland peace process, including the future of the International Fund for Ireland (IFI).
Date:
February 18, 2011
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
U.S.-EU Cooperation Against Terrorism
This report examines the evolution of counterterrorism cooperation between the United States and the European Union (EU), particularly since the September 11, 2001 terrorist attacks. It includes a discussion of U.S.-EU cooperation progress and ongoing challenges, as well as perspectives and issues for Congress.
Date:
July 18, 2011
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
Tunisia: Recent Developments and Policy Issues
Report that discusses Tunisia's "Jasmine Revolution," the common term for President Zine El Abidine Ben Ali's flight from the country following weeks of mounting anti-government protests. This report discusses how the Jasmine Revolution appears to have added momentum to anti-government sentiment in Egypt, Libya, Yemen, and other countries. This report discusses Tunisia's pro-democracy movement; concerns over potential instability in a previously secure, pro-Western area; U.S.-Tunisian relations; and Tunisia's push for for a greater focus on trade.
Date:
January 18, 2011
Creator:
Arieff, Alexis
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Vaughn Attaway, November 18, 2011
The National Museum of the Pacific War presents an oral interview with Vaughn Attaway. Attaway was married and living on the farm when he was drafted into the Army in October, 1944. After training, Attaway was shipped to Luzon and attached to the 161st Infantry Battlaion, 25th Infantry Division. Attaway describes varoius patrols he conducted in the hills on Luzon. When the war ended, Attaway's unit began training for the invasion of Japan. When the war ended, Attaway was assigned occupation duty in Japan. Attaway shares a few anecdotes about occupation duty. Attaway returned to the US and was discharged in August, 1946.
Date:
November 18, 2011
Creator:
Attaway, Vaughn
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Vaughn Attaway, November 18, 2011
The National Museum of the Pacific War presents an oral interview with Vaughn Attaway. Attaway was married and living on the farm when he was drafted into the Army in October, 1944. After training, Attaway was shipped to Luzon and attached to the 161st Infantry Battlaion, 25th Infantry Division. Attaway describes varoius patrols he conducted in the hills on Luzon. When the war ended, Attaway's unit began training for the invasion of Japan. When the war ended, Attaway was assigned occupation duty in Japan. Attaway shares a few anecdotes about occupation duty. Attaway returned to the US and was discharged in August, 1946.
Date:
November 18, 2011
Creator:
Attaway, Vaughn
Object Type:
Text
System:
The Portal to Texas History
Management Of Experiments And Data At The National Ignition Facility
Experiments, or 'shots', conducted at the National Ignition Facility (NIF) are discrete events that occur over a very short time frame (tens of nanoseconds) separated by many hours. Each shot is part of a larger campaign of shots to advance scientific understanding in high-energy-density physics. In one campaign, scientists use energy from the 192-beam, 1.8-Megajoule pulsed laser in the NIF system to symmetrically implode a hydrogen-filled target, thereby creating conditions similar to the interior of stars in a demonstration of controlled fusion. Each NIF shot generates gigabytes of data from over 30 diagnostics that measure optical, x-ray, and nuclear phenomena from the imploding target. We have developed systems to manage all aspects of the shot cycle. Other papers will discuss the control of the lasers and targets, while this paper focuses on the setup and management of campaigns and diagnostics. Because of the low duty cycle of shots, and the thousands of adjustments for each shot (target type, composition, shape; laser beams used, their power profiles, pointing; diagnostic systems used, their configuration, calibration, settings) it is imperative that we accurately define all equipment prior to the shot. Following the shot, and capture of the data by the automatic control system, …
Date:
March 18, 2011
Creator:
Azevedo, S; Casey, A; Beeler, R; Bettenhausen, R.; Bond, E.; Chandrasekaran, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Suicide, PTSD, and Substance Use Among OEF/OIF Veterans Using VA Health Care: Facts and Figures
This brief report addresses three relevant topics that affect veterans: suicide, posttraumatic stress disorder (PTSD), and substance use disorders.
Date:
July 18, 2011
Creator:
Bagalman, Erin
Object Type:
Report
System:
The UNT Digital Library
Colombia: Issues for Congress
This report provides an overview of recent political developments in Colombia. It reviews the administration of President Uribe (2002-2010), continuing into the election of President Juan Manuel Santos and his first months in office. The report then provides background on the longstanding conflict with internal armed groups that has marked Colombia’s modern development, examining the roots of the conflict and its major actors as well as their present status. The report considers ongoing challenges such as human rights, demobilization and displacement, drug trends, and Colombia’s regional relations. It outlines the National Consolidation Plan which updates Plan Colombia with a whole-of-government approach to eliminate the insurgency, and it describes the U.S.-Colombia Defense Cooperation Agreement. The report raises some of the major policy issues that the U.S. Congress has had, and will continue to pursue, in relation to U.S.-Colombia policy, such as the pending U.S.-Colombia Free Trade Agreement.
Date:
March 18, 2011
Creator:
Beittel, June S.
Object Type:
Report
System:
The UNT Digital Library
Feature-Based Statistical Analysis of Combustion Simulation Data
We present a new framework for feature-based statistical analysis of large-scale scientific data and demonstrate its effectiveness by analyzing features from Direct Numerical Simulations (DNS) of turbulent combustion. Turbulent flows are ubiquitous and account for transport and mixing processes in combustion, astrophysics, fusion, and climate modeling among other disciplines. They are also characterized by coherent structure or organized motion, i.e. nonlocal entities whose geometrical features can directly impact molecular mixing and reactive processes. While traditional multi-point statistics provide correlative information, they lack nonlocal structural information, and hence, fail to provide mechanistic causality information between organized fluid motion and mixing and reactive processes. Hence, it is of great interest to capture and track flow features and their statistics together with their correlation with relevant scalar quantities, e.g. temperature or species concentrations. In our approach we encode the set of all possible flow features by pre-computing merge trees augmented with attributes, such as statistical moments of various scalar fields, e.g. temperature, as well as length-scales computed via spectral analysis. The computation is performed in an efficient streaming manner in a pre-processing step and results in a collection of meta-data that is orders of magnitude smaller than the original simulation data. This meta-data …
Date:
November 18, 2011
Creator:
Bennett, J; Krishnamoorthy, V; Liu, S; Grout, R; Hawkes, E; Chen, J et al.
Object Type:
Article
System:
The UNT Digital Library
Tax Gap: Should the 3% Withholding Requirement on Payments to Contractors by Government Be Repealed?
This report covers the background and current status of three bills introduced to the 112th Congress to repeal Section 511 withholding provisions. The bills are S. 89, S. 164, and H.R. 674, as well as S.Amdt. 405 to S.782, the Economic Development Revitalization Act of 2011.
Date:
July 18, 2011
Creator:
Bickley, James M.
Object Type:
Report
System:
The UNT Digital Library
Libya: Unrest and U.S. Policy
This report discusses the recent unrest in Libya, triggered by political change in neighboring Tunisia and Egypt, as well as related U.S. policy.
Date:
March 18, 2011
Creator:
Blanchard, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
Libya: Background and U.S. Relations. February 2011
This report provides background information on Libya and U.S.-Libyan relations.
Date:
February 18, 2011
Creator:
Blanchard, Christopher M. & Zanotti, Jim
Object Type:
Report
System:
The UNT Digital Library
The United Nations Human Rights Council: Issues for Congress
This report provides historical background of the Council, including the role of the previous Commission. It discusses the Council's current mandate and structures, as well as U.S. policy and congressional actions. Finally, it highlights possible policy issues for the 112th Congress, including the overall effectiveness of the Council in addressing human rights, implications for U.S. membership, and U.S. financial contributions to the Council.
Date:
July 18, 2011
Creator:
Blanchfield, Luisa
Object Type:
Report
System:
The UNT Digital Library
Shutdown of the Federal Government: Causes, Processes, and Effects
This report discusses the causes of funding gaps and shutdowns of the federal government, processes that are associated with shutdowns, and how agency operations may be affected by shutdowns. The report concludes with a discussion of potential issues for Congress.
Date:
February 18, 2011
Creator:
Brass, Clinton T.
Object Type:
Report
System:
The UNT Digital Library
Isospin Splittings of Doubly Heavy Baryons
The SELEX Collaboration has reported a very large isospin splitting of doubly charmed baryons. We show that this effect would imply that the doubly charmed baryons are very compact. One intriguing possibility is that such baryons have a linear geometry Q-q-Q where the light quark q oscillates between the two heavy quarks Q, analogous to a linear molecule such as carbon dioxide. However, using conventional arguments, the size of a heavy-light hadron is expected to be around 0.5 fm, much larger than the size needed to explain the observed large isospin splitting. Assuming the distance between two heavy quarks is much smaller than that between the light quark and a heavy one, the doubly heavy baryons are related to the heavy mesons via heavy quark-diquark symmetry. Based on this symmetry, we predict the isospin splittings for doubly heavy baryons including {Xi}{sub cc}, {Xi}{sub bb} and {Xi}{sub bc}. The prediction for the {Xi}{sub cc} is much smaller than the SELEX value. On the other hand, the {Xi}{sub bb} baryons are predicted to have an isospin splitting as large as (6.3 {+-} 1.7) MeV. An experimental study of doubly bottomed baryons is therefore very important to better understand the structure of baryons …
Date:
August 18, 2011
Creator:
Brodsky, Stanley J.; Guo, Feng-Kun; Hanhart, Christoph & Meissner, Ulf-G.
Object Type:
Article
System:
The UNT Digital Library
Application of Religious Law in U.S. Courts: Selected Legal Issues
The report is categorized into three categories: (I) Religious Law and Its Application in U.S. Courts, (II) First Amendments Issues Related to Prohibition on Religious Laws in Courts and (III) Selected Proposed Prohibitions on Application of Religious Law.
Date:
May 18, 2011
Creator:
Brougher, Cynthia
Object Type:
Report
System:
The UNT Digital Library