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2009 Photosynthesis to be held June 28 - July 3, 2009
The capture of solar energy by photosynthesis has had a most profound influence on the development and sustenance of life on earth. It is the engine that has driven the proliferation of life and, as the source of both energy and oxygen, has had a major hand in shaping the forms that life has taken. Both ancient and present day photosynthetic carbon fixation is intimately tied to issues of immediate human concern, global energy and global warming. Decreasing our reliance on fossil fuels by tapping photosynthesis in a more direct way is an attractive goal for sustainable energy. Meeting this challenge means understanding photosynthetic energy conversion at a molecular level, a task requiring perspectives ranging through all disciplines of science. Researchers in photosynthesis have a strong history of working across conventional boundaries and engaging in multidisciplinary collaborations. The Gordon conference in photosynthesis has been a key focal point for the dissemination of new results and the establishment of powerful research collaborations. In this spirit the 2009 Gordon conference on biophysical aspects of photosynthesis will bring together top international researchers from diverse and complementary disciplines, all working towards understanding how photosynthesis converts light into the stable chemical energy that powers so …
Date:
July 6, 2009
Creator:
Bruce, Doug
Object Type:
Article
System:
The UNT Digital Library
Analysis of the Wakefield Effects in the PEP-II SLAC B-FACTORY
We present the history and analysis of different wake field effects throughout the operational life of the PEP-II SLAC B-factory. Although the impedance of the high and low energy rings is small, the intense high current beams generated a lot of power. The effects from these wake fields are: heating and damage of vacuum beam chamber elements like RF seals, vacuum valves , shielded bellows, BPM buttons and ceramic tiles; vacuum spikes, vacuum instabilities and high detector background; beam longitudinal and transverse instabilities. We also discuss the methods used to eliminate these effects. Results of this analysis and the PEP-II experience may be very useful in the design of new storage rings and light sources.
Date:
July 6, 2009
Creator:
Novokhatski, A; Seeman, J.; Sullivan, M.; Wienands, U. & /SLAC
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 89, No. 187, Ed. 1 Monday, July 6, 2009
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 6, 2009
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
Beam Diagnostic by Outside Beam Chamber Fields
Fields induced by a beam and penetrated outside the beam pipe can be used for a beam diagnostic. Wires placed in longitudinal slots in the outside wall of the beam pipe can work as a beam pickup. This has very small beam-coupling impedance and avoids complications of having a feed-through. The signal can be reasonably high at low frequencies. We calculate the beam-coupling impedance due to a long longitudinal slot in the resistive wall and the signal induced in a wire placed in such a slot and shielded by a thin screen from the beam. We present a field waveform at the outer side of a beam pipe, obtained as a result of calculations and measurements. Such kind of diagnostic can be used in storage rings, synchrotron light sources, and free electron lasers, like LINAC coherent light source.
Date:
July 6, 2009
Creator:
Novokhatski, A; Heifets, S. & Aleksandrov, A.
Object Type:
Article
System:
The UNT Digital Library
Cartoon Network LP v. CSC Holdings, Inc.: Remote-Storage Digital Video Recorders and Copyright Law
This report consists of cartoon network LP v. CSC holdings Inc with remote-storage digital video recorders and copyright law. It further discusses about Time-Shifting Technologies and litigation.
Date:
July 6, 2009
Creator:
Manuel, Kate M.
Object Type:
Report
System:
The UNT Digital Library
Covert Action: Legislative Background and Possible Policy Questions
Published reports have suggested that in the wake of the 9/11 terrorist attacks, the Pentagon has expanded its counter-terrorism intelligence activities as part of what the Bush Administration termed the global war on terror. This report discusses the Department of Defense's (DOD) various counter-terrorist intelligence activities, whether or not they constitute classification as "covert action," and the challenge of clarifying the roles and responsibilities of various intelligence activities with regard to clandestine activities. This report examines the statutory procedures governing covert action and associated questions to consider.
Date:
July 6, 2009
Creator:
Cumming, Alfred
Object Type:
Report
System:
The UNT Digital Library
DART testing new mobile customer service tool
News release about DART's "Where's My Bus?" app, which helps customers track their buses.
Date:
July 6, 2009
Creator:
Lyons, Morgan & Ball, Mark
Object Type:
Text
System:
The Portal to Texas History
Ecology of Juvenile Salmon in Shallow Tidal Freshwater Habitats in the Vicinity of the Sandy River Delta, Lower Columbia River, 2008 Annual Report.
The tidal freshwater monitoring (TFM) project reported herein is part of the research, monitoring, and evaluation effort developed by the Action Agencies (Bonneville Power Administration, the U.S. Army Corps of Engineers [USACE], and the U.S. Bureau of Reclamation) in response to obligations arising from the Endangered Species Act (ESA) as a result of operation of the Federal Columbia River Power System. The project is being performed under the auspices of the Northwest Power and Conservation Council's Columbia Basin Fish and Wildlife Program (Project No. 2005-001-00). The research is a collaborative effort among the Pacific Northwest National Laboratory, the Oregon Department of Fish and Wildlife, the National Marine Fisheries Service, and the University of Washington. The overarching goal of the TFM project is to bridge the gap in knowledge between tidal freshwater habitats and the early life history attributes of migrating salmon. The research questions include: In what types of habitats within the tidal freshwater area of the Columbia River are juvenile salmon found, when are they present, and under what environmental conditions? What is the ecological contribution of shallow (0-5 m) tidal freshwater habitats to the recovery of ESA-listed salmon in the Columbia River basin? Field data collection for the …
Date:
July 6, 2009
Creator:
Sather, NK; Johnson, GE & Storch, AJ
Object Type:
Report
System:
The UNT Digital Library
Economic Stimulus: Issues and Policies
Recent policies have sought to contain damages spilling over from housing and financial markets to the broader economy, including monetary policy, which is the responsibility of the Federal Reserve, and fiscal policy, including a tax cut in February 2008 of $150 billion and two extensions of unemployment compensation in June and November of 2008. This report discusses this problem as well as certain interventional measures that the government has taken and is considering taking to combat it, including various fiscal stimulus packages.
Date:
July 6, 2009
Creator:
Gravelle, Jane G.; Hungerford, Thomas L. & Labonte, Marc
Object Type:
Report
System:
The UNT Digital Library
The Effect of an Oxide Layer on Resistive-Wall Wakefields
Shorter and shorter electron bunches are now used in the FEL designs. The fine structure of the wall of a beam vacuum pipe plays more noticeable role in the wake field generation. Additionally to the resistance and roughness, the wall may have an oxide layer, which is usually a dielectric. It is important for aluminium pipe, which have Al2O3 layer. The thickness of this layer may vary in a large range: 1-100 nm. We study this effect for the very short (20-1000 nm) ultra relativistic bunches in an infinite round pipe. We solved numerically the Maxwell equations for the fields in the metal and ceramics. Results showed that the oxide layer may considerably increase the wavelength and the decay time of the resistive-wall wake fields, however the loss factor of the very short bunches does not change much.
Date:
July 6, 2009
Creator:
Novokhatski, A.
Object Type:
Article
System:
The UNT Digital Library
[Envelope Addressed to Texas Stonewall Democratic Caucus GPAC]
Photocopy of an envelope addressed to Al Daniels, Texas Stonewall Democratic Caucus GPAC from Stonewall Democrats of San Antonio.
Date:
July 6, 2009
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Monday, July 6, 2009
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 6, 2009
Creator:
Pittman, Jerry & Wray, Kelly
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Federal Role in Rail Transit Safety
On June 22, 2009, two transit trains in Washington, DC, collided, resulting in nine deaths and dozens of injuries. It was the worst crash in the history of the Washington Metropolitan Area Transit Authority's rail transit system. This crash has raised questions about the safety of rail transit and the government's role in ensuring that safety. Nationwide, rail transit is considered one of the safest modes of transportation. This report discusses the State Safety Oversight Program, which went into effect in 1997 and mandates that states are responsible for the safety of the rail transit systems within their borders. This report also explores several issues that Federal Transit Administration (FTA) representatives have discussed in regards to improving the Safety Oversight Program.
Date:
July 6, 2009
Creator:
Peterman, David Randall & Mallett, William J.
Object Type:
Report
System:
The UNT Digital Library
The Google Library Project: Is Digitization for Purposes of Online Indexing Fair Use Under Copyright Law?
The Google Book Search Library Project, announced in December 2004, raised important questions about infringing reproduction and fair use under copyright law. Google planned to digitize, index, and display "snippets" of print books in the collections of five major libraries without the permission of the books' copyright holders, if any. Google's proposed reproduction and display of copyrighted books was not authorized by the rights holders, who alleged that the Google Library Project infringed their copyrights. This report provides background on the Library Project, legal issues raised by digitization and indexing projects, and the proposed settlement.
Date:
July 6, 2009
Creator:
Manuel, Kate M.
Object Type:
Report
System:
The UNT Digital Library
Identification of Candidate Genes Affecting ∆⁹-tetrahydrocannabinol Biosynthesis in Cannabis sativa
Article discussing the identification of candidate genes affecting ∆⁹-tetrahydrocannabinol biosynthesis in Cannabis sativa.
Date:
July 6, 2009
Creator:
Marks, M. David; Tian, Li; Wenger, Jonathan P.; Omburo, Stephanie N.; Soto-Fuentes, Wilfredo; He, Ji et al.
Object Type:
Article
System:
The UNT Digital Library
Independent control of the shape and composition of ionic nanocrystals through sequential cation exchange reactions
Size- and shape-controlled nanocrystal growth is intensely researched for applications including electro-optic, catalytic, and medical devices. Chemical transformations such as cation exchange overcome the limitation of traditional colloidal synthesis, where the nanocrystal shape often reflects the inherent symmetry of the underlying lattice. Here we show that nanocrystals, with established synthetic protocols for high monodispersity, can be templates for independent composition control. Specifically, controlled interconversion between wurtzite CdS, chalcocite Cu2S, and rock salt PbS occurs while preserving the anisotropic dimensions unique to the as-synthesized materials. Sequential exchange reactions between the three sulfide compositions are driven by the disparate solubilites of the metal ion exchange pair in specific coordinating molecules. Starting with CdS, highly anisotropic PbS nanorods are created, which serve as an important material for studying strong 2-dimensional quantum confinement, as well as for optoelectronic applications. Furthermore, interesting nanoheterostructures of CdS|PbS are obtained by precise control over ion insertion and removal.
Date:
July 6, 2009
Creator:
Luther, Joseph Matthew; Zheng, Haimei; Sadtler, Bryce & Alivisatos, A. Paul
Object Type:
Article
System:
The UNT Digital Library
Intelligence Issues for Congress
This report discusses the efforts currently underway to improve coordination and encourage better analysis amongst the various agencies within the U.S. Intelligence Community, especially with regard to the ongoing and prominent issue of international terrorism. In particular, this report addresses the false intelligence regarding Iraqi weapons of mass destruction and the current efforts in Iraq and Iran in general.
Date:
July 6, 2009
Creator:
Best, Richard A., Jr.
Object Type:
Report
System:
The UNT Digital Library
Iran's 2009 Presidential Elections
This report analyzes and discusses Iran's 2009 presidential election, particularly the campaigns of reformist candidate Mir Hussein Musavi and incumbent President Mahmoud Ahmadinejad. Allegations of vote rigging and election fraud have led to protests by supporters of candidate Musavi and have provoked international attention. This report also discusses the Obama Administration's reaction to the election results. This report also discusses briefly the current relationship between the U.S. and Iran, as well as U.S. concerns regarding Iran, such as Iran's efforts at building a nuclear weapons program.
Date:
July 6, 2009
Creator:
Addis, Casey L.
Object Type:
Report
System:
The UNT Digital Library
Klystron Cluster Scheme for ILC High Power RF Distribution
We present a concept for powering the main linacs of the International Linear Collider (ILC) by delivering high power RF from the surface via overmoded, low-loss waveguides at widely spaced intervals. The baseline design employs a two-tunnel layout, with klystrons and modulators evenly distributed along a service tunnel running parallel to the accelerator tunnel. This new idea eliminates the need for the service tunnel. It also brings most of the warm heat load to the surface, dramatically reducing the tunnel water cooling and HVAC requirements. In the envisioned configuration, groups of 70 klystrons and modulators are clustered in surface buildings every 2.5 km. Their outputs are combined into two half-meter diameter circular TE{sub 01} mode evacuated waveguides. These are directed via special bends through a deep shaft and along the tunnel, one upstream and one downstream. Each feeds approximately 1.25 km of linac with power tapped off in 10 MW portions at 38 m intervals. The power is extracted through a novel coaxial tap-off (CTO), after which the local distribution is as it would be from a klystron. The tap-off design is also employed in reverse for the initial combining.
Date:
July 6, 2009
Creator:
Nantista, Christopher & Adolphsen, Chris
Object Type:
Article
System:
The UNT Digital Library
Longitudinal Beam Stability in the SUPER B-FACTORY*
We give an overview of wake fields and impedances in a proposed Super B project, which is based on extremely low emittance beams colliding at a large angle with a crab waist transformation. Understanding the effects that wake fields have on the beam is critical for a successful machine operation. We use our combined experience from the operation of the SLAC B-factory and DA{Phi}NE {Phi}-factory to eliminate strong HOM sources and minimize the chamber impedance in the Super B design. Based on a detailed study of the wake fields in this design we have developed a quasi-Green's function for the entire ring that is used to study bunch lengthening and beam stability. In particular, we check the stability threshold using numerical solutions of the Fokker-Plank equation. We also make a comparison of numerical simulations with the bunch lengthening data in the B- factory.
Date:
July 6, 2009
Creator:
Novokhatski, A. & Zobov, M.
Object Type:
Article
System:
The UNT Digital Library
Mérida Initiative for Mexico and Central America: Funding and Policy Issues
In October 2007, the United States and Mexico announced the Mérida Initiative, a three-year program of U.S. assistance to Mexico and Central America to combat drug trafficking, gangs, and organized crime. This report provides an overview and discussion of the funding provided for Mérida, and presents several issues that Congress may consider as it oversees implementation of the Initiative and shapes its future direction.
Date:
July 6, 2009
Creator:
Seelke, Clare Ribando & Beittel, June S.
Object Type:
Report
System:
The UNT Digital Library
Military Personnel: Reserve Compensation Has Increased Significantly and Is Likely to Rise Further as DOD and VA Prepare for the Implementation of Enhanced Educational Benefits
Correspondence issued by the Government Accountability Office with an abstract that begins "In past reports, we have raised a number of concerns about the effectiveness of DOD's approach to compensation. For example, in our 2005 report on the challenges facing the United States in the 21st century, we emphasized the need for a baseline review of all major federal programs and policies, including military compensation, to ensure that they are efficiently and effectively meeting their objectives, particularly in light of concerns about the affordability and sustainability of federal spending. In 2005 and 2007, we assessed the active duty and reserve compensation systems and found the cost to provide compensation was substantial and rising. We also found that DOD's piecemeal approach to compensation involved increasing or making changes to compensation without completely understanding the impact that these changes might have on recruitment and retention. As DOD increasingly relies on the reserve components to carry out its military operations domestically and abroad, DOD and Congress have taken steps to improve recruitment and retention by increasing compensation. One example involves expanding educational benefits for mobilized reservists. The recently enacted Post 9-11 Veterans Educational Assistance Act (Post 9-11 VEAA), which becomes effective on August …
Date:
July 6, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Preserving Homeownership: Foreclosure Prevention Initiatives
This report describes the consequences of foreclosure on homeowners, outlines recent foreclosure prevention plans implemented by the government and private organizations, and discusses the challenges associated with foreclosure prevention.
Date:
July 6, 2009
Creator:
Jones, Katie
Object Type:
Report
System:
The UNT Digital Library
Project BioShield: Purposes and Authorities
Many potential chemical, biological, radiological, and nuclear (CBRN) terrorism agents lack available countermeasures. In 2003, President Bush proposed Project BioShield to address this need. The Project BioShield Act became law in July 2004. This report discusses the three main provisions of Project BioShield, funding for Project BioShield, and additional measures that Congress has considered since Project BioShield's implementation to further encourage CBRN countermeasure development.
Date:
July 6, 2009
Creator:
Gottron, Frank
Object Type:
Report
System:
The UNT Digital Library