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Using GIS to Identify Remediation Areas in Landfills (open access)

Using GIS to Identify Remediation Areas in Landfills

This paper reports the use of GIS mapping software—ArcMap and ArcInfo Workstation—by the Idaho National Engineering and Environmental Laboratory (INEEL) as a non-intrusive method of locating and characterizing radioactive waste in a 97-acre landfill to aid in planning cleanup efforts. The fine-scale techniques and methods used offer potential application for other burial sites for which hazards indicate a non-intrusive approach. By converting many boxes of paper shipping records in multiple formats into a relational database linked to spatial data, the INEEL has related the paper history to our current GIS technologies and spatial data layers. The wide breadth of GIS techniques and tools quickly display areas in need of remediation as well as evaluate methods of remediation for specific areas as the site characterization is better understood and early assumptions are refined.
Date: August 1, 2004
Creator: A.Tedrow, Linda
Object Type: Article
System: The UNT Digital Library
Sorption of Cesium From Aqueous Waste Solution on SuperLig 644 Resin (open access)

Sorption of Cesium From Aqueous Waste Solution on SuperLig 644 Resin

The removal of cesium from aqueous waste solution was investigated in a column setup using SuperLig(R) 644 resin. The resin was significantly coarser in size than those used in previous studies because of hydraulic problems encountered during pilot-scale tests. The bed volume (BV = 140) at the onset of breakthrough surpassed the design requirement of 100 BV at 50 percent breakthrough. The percent of cesium removed by the resin at the onset of breakthrough was 99.96. The elution of cesium with 0.5 M HNO3 was satisfactory with a peak BV of 2.5. The elution BV for C/Co = 0.01 was 10, which is less than the target of 15 BV. The percent of sorbed cesium eluted from the resin was 99.88 percent. In addition, the BV of the various solutions used for the supporting process steps (feed displacement, post-feed displacement rinse, post-elution rinse, and regeneration) of the cesium ion exchange system was sufficient.
Date: August 24, 2004
Creator: ADU-WUSU, KOFI
Object Type: Article
System: The UNT Digital Library
HIGH-INTENSITY, HIGH CHARGE-STATE HEAVY ION SOURCES (open access)

HIGH-INTENSITY, HIGH CHARGE-STATE HEAVY ION SOURCES

There are many accelerator applications for high intensity heavy ion sources, with recent needs including dc beams for RIA, and pulsed beams for injection into synchrotrons such as RHIC and LHC. The present status of sources producing high currents of high charge state heavy ions is reviewed. These sources include ECR, EBIS, and Laser ion sources. Benefits and limitations for these type sources are described. Possible future improvements in these sources are also mentioned.
Date: August 16, 2004
Creator: ALESSI,J. G.
Object Type: Article
System: The UNT Digital Library
WasteWater Treatment And Heavy Metals Removal In The A-01 Constructed Wetland 2003 Report (open access)

WasteWater Treatment And Heavy Metals Removal In The A-01 Constructed Wetland 2003 Report

The A-01 wetland treatment system (WTS) was designed to remove metals from the effluent at the A-01 NPDES outfall. The purpose of research conducted during 2003 was to evaluate (1) the ability of the A-01 wetland treatment system to remediate waste water, (2) retention of the removed contaminants in wetland sediment, and (3) the potential remobilization of these contaminants from the sediment into the water column. Surface water and sediment samples were collected and analyzed in this study.
Date: August 1, 2004
Creator: ANNA, KNOX
Object Type: Report
System: The UNT Digital Library
Electricity: The Road Toward Restructuring (open access)

Electricity: The Road Toward Restructuring

This report talks about Electricity regulation and transmission issues. It also includes the history of the California Electricity Crisis.
Date: August 10, 2004
Creator: Abel, Amy
Object Type: Report
System: The UNT Digital Library
New Correction Procedure for X-Ray Spectroscopic Fluorescence Data: Simulations and Experiment. (open access)

New Correction Procedure for X-Ray Spectroscopic Fluorescence Data: Simulations and Experiment.

X-ray fluorescence spectroscopy is a widely used method for determining the electronic configuration and local structure of dilute species with high sensitivity. In the dilute limit, and for thin films, the X-ray fluorescence signal is directly proportional to the atomic sub-shell absorption coefficient. However, for concentrated samples, the well-documented self-absorption effect often leads to the severe suppression of XANES (X-ray Absorption Near-Edge Structure) and EXAFS (Extended X-ray Absorption Fine-Structure) amplitudes. Thus to recover the real value of the sub-shell absorption coefficient, it is important to apply correction procedures to the measured fluorescence spectra. In this paper, we describe a new straightforward method to correct for self-absorption effects (the difference in the measured fluorescence signal compared to that of the true sub-shell photoabsorption coefficient) in XANES and EXAFS fluorescence measurements. Using a variety of sample and detector configurations, this method is used to extract the sub-shell absorption coefficient on elemental nickel and thick single-crystals of Gd{sub 3}Ga{sub 5}O{sub 12} and LaAlO{sub 3}.
Date: August 2, 2004
Creator: Ablett, J. M.; Woicik, J. C. & Kao, C. C.
Object Type: Article
System: The UNT Digital Library
Unstable crack motion is predictable (open access)

Unstable crack motion is predictable

Yoffe's linear theory of dynamic brittle fracture suggests that crack motion will be unstable beyond {approx}70% of the Rayleigh speed, a prediction that is not supported by experiment. We show by atomistic simulations that hyperelasticity, the elasticity of large strains, plays a governing role in the instability dynamics of brittle fracture. A simple scaling model based on an effective elastic modulus, coupled with Yoffe's solution, gives successful predictions for the onset speed of the crack instability.
Date: August 22, 2004
Creator: Abraham, F
Object Type: Article
System: The UNT Digital Library
FUEL HANDLING FACILITY WORKER DOSE ASSESSMENT (open access)

FUEL HANDLING FACILITY WORKER DOSE ASSESSMENT

The purpose of this design calculation is to estimate radiation doses received by personnel working in the Fuel Handling Facility (FHF) of the Monitored Geological Repository (MGR). The FHF is a surface facility supporting waste handling operations i.e. receive transportation casks, transfer wastes, prepare waste packages, and ship out loaded waste packages and empty casks. The specific scope of work contained in this calculation covers both collective doses and individual worker group doses on an annual basis, and includes the contributions due to external and internal radiation. The results are also limited to normal operations only. Results of this calculation will be used to support the FHF design and License Application.
Date: August 9, 2004
Creator: Achudume, A.
Object Type: Report
System: The UNT Digital Library
B-factory signals for a warped extra dimension (open access)

B-factory signals for a warped extra dimension

We study predictions for B-physics in a class of models, recently introduced, with a non-supersymmetric warped extra dimension. In these models few ({approx} 3) TeV Kaluza-Klein masses are consistent with electroweak data due to bulk custodial symmetry. Furthermore, there is an analog of GIM mechanism which is violated by the heavy top quark (just as in SM) leading to striking signals at B-factories: (1) New Physics (NP) contributions to {Delta}F = 2 transitions are comparable to SM. This implies that, within this NP framework, the success of the SM unitarity triangle fit is a ''coincidence''. Thus, clean extractions of unitarity angles via e.g. B {yields} {pi}{pi}, {rho}{pi}, {rho}{rho}, DK are likely to be affected, in addition to O(1) deviation from SM prediction in Bs mixing. (2) O(1) deviation from SM predictions for B {yields} X{sub s}{ell}{sup +}{ell}{sup -} in rate as well as in forward-backward and direct CP asymmetry. (3) Large mixing-induced CP asymmetry in radiative B decays, wherein the SM unambiguously predicts very small asymmetries. Also, with KK masses 3 TeV or less, and with anarchic Yukawa masses, contributions to electric dipole moments of the neutron are roughly 20 times larger than the current experimental bound so that this …
Date: August 24, 2004
Creator: Agashe, Kaustubh; Perez, Gilad & Soni, Amarjit
Object Type: Article
System: The UNT Digital Library
Flavor Structure of Warped Extra Dimension Models (open access)

Flavor Structure of Warped Extra Dimension Models

We recently showed, in hep-ph/0406101, that warped extra dimensional models with bulk custodial symmetry and few TeV KK masses lead to striking signals at B-factories. In this paper, using a spurion analysis, we systematically study the flavor structure of models that belong to the above class. In particular we find that the profiles of the zero modes, which are similar in all these models, essentially control the underlying flavor structure. This implies that our results are robust and model independent in this class of models. We discuss in detail the origin of the signals in B-physics. We also briefly study other NP signatures that arise in rare K decays (K {yields} {pi}{nu}{nu}), in rare top decays [t {yields} c{gamma}(Z, gluon)] and the possibility of CP asymmetries in D{sup 0} decays to CP eigenstates such as K{sub s}{pi}{sup 0} and others. Finally we demonstrate that with light KK masses, {approx} 3 TeV, the above class of models with anarchic 5D Yukawas has a ''CP problem'' since contributions to the neutron electric dipole moment are roughly 20 times larger than the current experimental bound. Using AdS/CFT correspondence, these extra-dimensional models are dual to a purely 4D strongly coupled conformal Higgs sector thus …
Date: August 10, 2004
Creator: Agashe, Kaustubh; Perez, Gilad & Soni, Amarjit
Object Type: Article
System: The UNT Digital Library

Subscriber Maximization in CDMA Cellular Networks

This presentation gives an overview of code division multiple access (CDMA), traffic and mobility models, subscriber optimization formulation, and numerical results.
Date: August 2004
Creator: Akl, Robert G.
Object Type: Presentation
System: The UNT Digital Library
Subscriber Maximization in CDMA Cellular Networks (open access)

Subscriber Maximization in CDMA Cellular Networks

This paper discusses subscriber maximization in CDMA cellular networks.
Date: August 2004
Creator: Akl, Robert G.
Object Type: Paper
System: The UNT Digital Library
Evaporative Evolution of a Na-Cl-NO3-K-Ca-SO4-Mg-Si Brine at 95(degree)C: Experiments and Modeling relevant to Yucca Mountain, Nevada, USA (open access)

Evaporative Evolution of a Na-Cl-NO3-K-Ca-SO4-Mg-Si Brine at 95(degree)C: Experiments and Modeling relevant to Yucca Mountain, Nevada, USA

A synthetic Topopah Spring Tuff water representative of one type of pore water at Yucca Mountain, Nevada (USA) was evaporated at 95 C in a series of experiments to determine the geochemical controls for brines that may form on, and possibly impact upon the long-term integrity of waste containers and drip shields at the designated high-level, nuclear-waste repository. Solution chemistry, condensed vapor chemistry, and precipitate mineralogy were used to identify important chemical divides and to validate geochemical calculations of evaporating water chemistry using a high temperature Pitzer thermodynamic database. The water evolved towards a complex ''sulfate type'' brine that contained about 45 mol% Na, 40 mol% Cl, 9 mol% NO{sub 3}, 5 mol% K, and less than 1 mol% each of SO{sub 4}, Ca, Mg, {Sigma}CO{sub 2}(aq), F, and Si. All measured ions in the condensed vapor phase were below detection limits. The mineral precipitates identified were halite, anhydrite, bassanite, niter and nitratine. Trends in the solution composition and identification of CaSO{sub 4} solids suggest that fluorite, carbonate, sulfate, and magnesium-silicate precipitation control the aqueous solution composition of sulfate type waters by removing fluoride, calcium, and magnesium during the early stages of evaporation. In most cases, the high temperature Pitzer …
Date: August 24, 2004
Creator: Alai, M; Sutton, M & Carroll, S A
Object Type: Article
System: The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 30, Ed. 1 Thursday, August 5, 2004 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 30, Ed. 1 Thursday, August 5, 2004

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: August 5, 2004
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 31, Ed. 1 Thursday, August 12, 2004 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 31, Ed. 1 Thursday, August 12, 2004

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: August 12, 2004
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 32, Ed. 1 Thursday, August 19, 2004 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 32, Ed. 1 Thursday, August 19, 2004

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: August 19, 2004
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 34, Ed. 1 Thursday, August 26, 2004 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 34, Ed. 1 Thursday, August 26, 2004

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: August 26, 2004
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Oral History Interview with Thomas Alt, August 24, 2004 transcript

Oral History Interview with Thomas Alt, August 24, 2004

The National Museum of the Pacific War presents an interview with Thomas Alt. Alt joined the Aviation Cadet Corps in June of 1942 at the age of 17. By January of 1943, once he turned 18, he was called up for training. In mid-1943 he traveled to Pearl Harbor, and completed Fire Fighting School with the Navy while on the island. In mid-1944 Alt was assigned to the USS Sea Cat (SS-399). He worked as Military Police on night shifts and guard duty in the brig. They traveled to Saipan and the South China Sea where the Sea Cat operated in a wolf pack. He landed on Saipan 7 July 7, as the battle was coming to an end. He served with a firefighting crew on the beach for pilots making emergency or crash landings. Alt remained on Saipan through early 1945. He was stationed on Tinian in July, and recalls when the Enola Gay landed. He returned to the US and was discharged in March of 1945.
Date: August 24, 2004
Creator: Alt, Thomas
Object Type: Sound
System: The Portal to Texas History
Oral History Interview with Thomas Alt, August 24, 2004 (open access)

Oral History Interview with Thomas Alt, August 24, 2004

The National Museum of the Pacific War presents an interview with Thomas Alt. Alt joined the Aviation Cadet Corps in June of 1942 at the age of 17. By January of 1943, once he turned 18, he was called up for training. In mid-1943 he traveled to Pearl Harbor, and completed Fire Fighting School with the Navy while on the island. In mid-1944 Alt was assigned to the USS Sea Cat (SS-399). He worked as Military Police on night shifts and guard duty in the brig. They traveled to Saipan and the South China Sea where the Sea Cat operated in a wolf pack. He landed on Saipan 7 July 7, as the battle was coming to an end. He served with a firefighting crew on the beach for pilots making emergency or crash landings. Alt remained on Saipan through early 1945. He was stationed on Tinian in July, and recalls when the Enola Gay landed. He returned to the US and was discharged in March of 1945.
Date: August 24, 2004
Creator: Alt, Thomas
Object Type: Text
System: The Portal to Texas History
Summary of the Environmental Radiological Monitoring Program at Lawrence Livermore National Laboratory (open access)

Summary of the Environmental Radiological Monitoring Program at Lawrence Livermore National Laboratory

None
Date: August 12, 2004
Creator: Althouse, P E
Object Type: Report
System: The UNT Digital Library
Perceptions and attributions of child, spousal, and elder abuse. (open access)

Perceptions and attributions of child, spousal, and elder abuse.

Although researchers have studied perceptions regarding sexually abused children, little was known about how other types of abusive events were perceived. This study examined 480 college students' abuse history and perceptions of child, spousal, and elder abuse by varying the respondent, victim, and perpetrator genders. Physical abuse, psychological abuse, and neglect were investigated. Perceptions of abusiveness, seriousness, harm, and responsibility were examined, along with the extent of identification with the victims/perpetrators. Participants viewed spousal abuse as less serious and harmful than other abuse types, especially when perpetrated against a male or by a female. Although able to recognize psychological abuse, students did not fully understand what other abuse types entailed. Individuals also showed a considerable amount of blame toward victims. Results further demonstrated important findings about how ethnic identity/orientation, religious affiliation, and history of abuse related to perceptions of abusive events.
Date: August 2004
Creator: Altman, Adrianne
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Newsletter of the Texas Chapter of the American Fisheries Society, Volume 30, Number 2, Autumn 2004 (open access)

The Newsletter of the Texas Chapter of the American Fisheries Society, Volume 30, Number 2, Autumn 2004

Newsletter of the Texas Chapter of the American Fisheries Society containing information about the organization, membership, and field of aquaculture and ecosystem management.
Date: August 2004
Creator: American Fisheries Society. Texas Chapter.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Time-dependence ion charge state distributions of vacuum arcs: An interpretation involving atoms and charge exchange collisions (open access)

Time-dependence ion charge state distributions of vacuum arcs: An interpretation involving atoms and charge exchange collisions

Experimentally observed charge state distributions are known to be higher at the beginning of each arc discharge. Up to know, this has been attributed to cathode surface effects in terms of changes of temperature, chemical composition and spot mode. Here it is shown that the initial decay of charge states of cathodic arc plasmas may at least in part due to charge exchange collisions of ions with neutrals that gradually fill the discharge volume. Sources of neutrals may include evaporated atoms from macroparticles and still-hot craters of previously active arc spots. More importantly, atoms are also produced by energetic condensation of the cathodic arc plasma. Self-sputtering is significant when ions impact with near-normal angle of incidence, and ions have low sticking probability when impacting at oblique angle of incidence. Estimates show that the characteristic time for filling the near-cathode discharge volume agrees well with the charge state decay time, and the likelihood of charge exchange is reasonably large to be taken into account.
Date: August 27, 2004
Creator: Anders, Andre
Object Type: Article
System: The UNT Digital Library
Through Weld Inspection of Wrought Stainless Steel Piping Using Phased-Array Ultrasonic Probes. (open access)

Through Weld Inspection of Wrought Stainless Steel Piping Using Phased-Array Ultrasonic Probes.

A study was conducted to assess the ability of phased-array ultrasonic techniques to detect and accurately determine the size of flaws from the far-side of wrought austenitic piping welds. Far-side inspections of these welds are currently performed on a “best effort” basis and do not conform to ASME Code Section XI Appendix VIII performance demonstration requirements. For this study, four circumferential welds in 610mm diameter, 36mm thick ASTM A-358, Grade 304 vintage austenitic stainless steel pipe were examined. The welds were fabricated with varied welding parameters; both horizontal and vertical pipe orientations were used, with air and water backing, to simulate field welding conditions. A series of saw cuts, electro-discharge machined (EDM) notches, and implanted fatigue cracks were placed into the heat affected zones of the welds. The saw cuts and notches range in depth from 7.5% to 28.4% through-wall. The implanted cracks ranged in depth from 5% through wall to 64% through wall. The welds were examined with two phased-array probes, a 2.0 MHz transmit-receive longitudinal wave array and a 2.0 MHz transmit-receive shear wave array. These examinations showed that both phased-array transducers were able to detect and accurately length-size, but not depth size, all of the notches and …
Date: August 5, 2004
Creator: Anderson, Michael T.; Cumblidge, Stephen E. & Doctor, Steven R.
Object Type: Article
System: The UNT Digital Library