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Analytical Modeling of Wave Generation by the Borehole OrbitalVibrator Source (open access)

Analytical Modeling of Wave Generation by the Borehole OrbitalVibrator Source

The orbital vibrator source (a fluid-coupled shear wave source) has many unique properties that are useful for cross-well, single-well, and borehole-to-surface imaging of both P- (compressional)and S-(shear) wave velocities of reservoir rocks. To this day, however, no standard models for this source have been established, and the mechanism of wave generation and the characteristics of wave field around the source are not well understood yet. In this article, we develop both two and three-dimensional analytical models of the orbital vibrator source, which allow us to examine the source characteristics such as radiation patterns, frequency-dependence of the wave energy, and guided-wave generation. These models are developed in the frequency-wave number domain using the partial wave expansion of the wavefield within and outside the borehole. The results show that the developed models successfully reproduce many characteristics of orbital vibrator source that have been observed in the field, including formation property-dependent vibrator amplitudes, uniform isotropic shear wave radiation pattern, and small tube-wave generation.
Date: June 28, 2004
Creator: Nakagawa, Seiji & Daley, Thomas M.
Object Type: Article
System: The UNT Digital Library
Ion trapping in Recycler Ring (open access)

Ion trapping in Recycler Ring

Transverse instabilities have been observed in the antiproton beam stored in the Fermilab Recycler Ring, resulting in a sudden increase in the transverse emittances and a small beam loss. The instabilities appear to occur a few hours after a change in the ramping pattern of the Main Injector which shares the same tunnel. The phenomena have been studied by inducing similar instabilities. However, the mechanism is still unknown. A possible explanation is that the ions trapped in the beam reach such an intensity that collective coupled transverse oscillation occurs. However, there is no direct evidence of the trapped ions at this moment.
Date: June 28, 2004
Creator: Ng, King-Yuen
Object Type: Article
System: The UNT Digital Library
Seal Monitoring System for an Explosive Containment Vessel (open access)

Seal Monitoring System for an Explosive Containment Vessel

Researchers at Lawrence Livermore National Laboratory are developing high-performance explosive firing vessels to contain (one time) explosive detonations that contain toxic metals and hazardous gases. The filament-wound polymer composite vessels are designed to contain up to 80 lb (TNT equivalent) explosive in a 2-meter sphere without leakage. So far, two half-scale (1-meter diameter) vessels have been tested; one up to 150% of the design explosive limit. Peak dynamic pressures in excess of 280 MPa (40 Ksi) in the vessel were calculated and measured. Results indicated that there was a small amount of gas and particle leakage past the first two of the seven o-ring seals. However, the remaining five seals prevented any transient leakage of the toxic gases and particulates out of the vessel. These results were later confirmed by visual inspection and particulate analysis of swipes taken from the sealing surfaces.
Date: June 28, 2004
Creator: Pastrnak, J. W.; Henning, C. D.; Switzer, V. A.; Grundler, W.; Holloway, J. R.; Morrison, J. J. et al.
Object Type: Article
System: The UNT Digital Library
Retirement Savings and Household Wealth: A Summary of Recent Data (open access)

Retirement Savings and Household Wealth: A Summary of Recent Data

None
Date: June 28, 2004
Creator: Purcell, Patrick J.
Object Type: Report
System: The UNT Digital Library
The Alvin Sun (Alvin, Tex.), Vol. 114, No. 52, Ed. 1 Monday, June 28, 2004 (open access)

The Alvin Sun (Alvin, Tex.), Vol. 114, No. 52, Ed. 1 Monday, June 28, 2004

Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date: June 28, 2004
Creator: Schwind, Jim & Looby, Edward
Object Type: Newspaper
System: The Portal to Texas History
Jet Physics at CDF (open access)

Jet Physics at CDF

Jets have been studied by the CDF Collaboration [1] as a means of searching for new particles and interactions, testing a variety of perturbative QCD predictions, and providing input for the global parton distribution function (PDF) fits. Unless otherwise indicated below, the jets were reconstructed using a cone algorithm [2] with cone radius R = 0.7 from data taken at the Fermilab Tevatron collider in Run 2, 2001-2003, with {radical}s = 1.96 TeV. Central jets, in the pseudorapidity range relative to fixed detector coordinates 0.1 < |{eta}| < 0.7, are used.
Date: June 28, 2004
Creator: Seidel, Sally
Object Type: Article
System: The UNT Digital Library
Measurement of Tritium Surface Distribution on TFTR Bumper Limiter Tiles (open access)

Measurement of Tritium Surface Distribution on TFTR Bumper Limiter Tiles

The tritium surface distribution on graphite tiles used in the Tokamak Fusion Test Reactor (TFTR) bumper limiter and exposed to TFTR deuterium-tritium (D-T) discharges from 1993 to 1997 was measured by the Tritium Imaging Plate Technique (TIPT). The TFTR bumper limiter shows both re-/co-deposition and erosion. The tritium images for all tiles measured are strongly correlated with erosion and deposition patterns, and long-term tritium retention was found in the re-/co-depositions and flakes. The CFC tiles located at erosion dominated areas clearly showed their woven structure in their tritium images owing to different erosion yields between fibers and matrix. Significantly high tritium retention was observed on all sides of the erosion tiles, indicating carbon transport via repetition of local erosion/deposition cycles.
Date: June 28, 2004
Creator: Sugiyama, K.; Tanabe, T.; Skinner, C. H. & Gentile, C. A.
Object Type: Report
System: The UNT Digital Library
Child Care and Child Welfare: Background Checks (open access)

Child Care and Child Welfare: Background Checks

This report discusses the details related to background checks to help ensure the safety of children served through their organizations.
Date: June 28, 2004
Creator: Swenson, Kendall
Object Type: Report
System: The UNT Digital Library
The Chief Operating Officer Concept and its Potential Use as a Strategy to Improve Management at the Department of Homeland Security (open access)

The Chief Operating Officer Concept and its Potential Use as a Strategy to Improve Management at the Department of Homeland Security

Correspondence issued by the General Accounting Office with an abstract that begins "In a May 18, 2004 letter, the Chairman of the House Select Committee on Homeland Security observed that many management and integration challenges remain at the Department of Homeland Security (DHS) and to strengthen the departmentwide reforms and transformation underway at DHS the Select Committee is considering options such as the Chief Operating Officer (COO) concept to help address these challenges. This letter describes the roles and responsibilities of an effective COO and presents certain options that could serve to strengthen and streamline management functions in a department as large and diverse as DHS. As agreed, we have summarized our reports on the COO concept, organizational transformation, as well as DHS's management and transformation challenges."
Date: June 28, 2004
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Independent Standard-Setting Process for Establishing Accounting Standards for Private-Sector Entities (open access)

Independent Standard-Setting Process for Establishing Accounting Standards for Private-Sector Entities

Correspondence issued by the General Accounting Office with an abstract that begins "On March 31, 2004, the Financial Accounting Standards Board (FASB) issued an exposure document on a proposed Statement, Share-Based Payment, an Amendment of FASB Statements No. 123 and 95, which addresses the accounting for compensation to employees in the form of equity shares, including stock options. GAO recognizes that this is a complex and controversial issue on which reasonable people can and do disagree. In light of the above, there has been a renewed interest for the Congress to legislate accounting rules for stock options. Notwithstanding our and others' views on the merits of various accounting methods for stock options, GAO believes that the principle of independence, both in fact and in appearance, is essential to the credibility of and confidence in any authoritative standard-setting processes. With respect to the role of FASB in this and other areas, we support its efforts, as the Securities and Exchange Commission's (SEC) designated independent private-sector standard-setting body, to identify issues for consideration, prepare exposure documents, conduct outreach efforts and solicit comments on exposure documents, and consider the resulting comments in finalizing and issuing new accounting standards. This time-tested and proven deliberative …
Date: June 28, 2004
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Information Security: Agencies Need to Implement Consistent Processes In Authorizing Systems for Operation (open access)

Information Security: Agencies Need to Implement Consistent Processes In Authorizing Systems for Operation

A letter report issued by the General Accounting Office with an abstract that begins "The Office of Management and Budget (OMB) requires agencies to certify the security controls of their information systems and to formally authorize and accept the risk associated with their operation (a process known as accreditation). These processes support requirements of the Federal Information Security Management Act of 2002 (FISMA). Further, OMB requires agencies to report the number of systems authorized following certification and accreditation as one of the key FISMA performance measures. In response to the Congressional request, GAO (1) identified existing governmentwide requirements and guidelines for certifying and accrediting information systems, (2) determined the extent to which agencies have reported their systems as certified and accredited, and (3) assessed whether their processes provide consistent, comparable results and adequate information for authorizing officials."
Date: June 28, 2004
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Military Operations: Recent Campaigns Benefited from Improved Communications and Technology, but Barriers to Continued Progress Remain (open access)

Military Operations: Recent Campaigns Benefited from Improved Communications and Technology, but Barriers to Continued Progress Remain

A letter report issued by the General Accounting Office with an abstract that begins "Recent U.S. combat operations in Kosovo, Afghanistan, and Iraq benefited from new Department of Defense (DOD) strategies and technologies, such as improvements in force networks and increased use of precision weapons, designed to address changes in the security environment resulting from the continuing terrorist threat and the advent of the information age. Based on the authority of the Comptroller General, GAO reviewed these conflicts, with a focus on bombing operations, to gain insight into the changes being implemented by DOD. This report focuses on (1) assessing the impact on operational effectiveness of improvements in force networks and in the use of precision weapons and (2) identifying key barriers to continued progress."
Date: June 28, 2004
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Rebuilding Iraq: Resource, Security, Governance, Essential Services, and Oversight Issues (open access)

Rebuilding Iraq: Resource, Security, Governance, Essential Services, and Oversight Issues

Correspondence issued by the General Accounting Office with an abstract that begins "Rebuilding Iraq is a U.S. national security and foreign policy priority. According to the President, the United States intends to help Iraq achieve democracy and freedom and has a vital national interest in the success of free institutions in Iraq. As of April 30, 2004, billions of dollars in grants, loans, assets, and revenues from various sources have been made available or pledged to the reconstruction of Iraq. The United States, along with its coalition partners and various international organizations and donors, has embarked on a significant effort to rebuild Iraq following multiple wars and decades of neglect by the former regime. The Coalition Provisional Authority (CPA), established in May 2003, was the U.N.-recognized coalition authority led by the United States and the United Kingdom that was responsible for the temporary governance of Iraq. Specifically, the CPA wasresponsible for overseeing, directing, and coordinating the reconstruction effort. On June 28, 2004, the CPA transferred power to a sovereign Iraqi interim government, and the CPA officially dissolved. To pave the way for this transfer, the CPA helped the Iraq Governing Council develop the Law of Administration for the State of …
Date: June 28, 2004
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Oklahoma City Branch NAACP Meeting Agenda (open access)

Oklahoma City Branch NAACP Meeting Agenda

Meeting agenda for the Oklahoma City Branch of the NAACP.
Date: June 28, 2004
Creator: unknown
Object Type: Text
System: The Gateway to Oklahoma History
Taiwan: Major U.S. Arms Sales Since 1990 (open access)

Taiwan: Major U.S. Arms Sales Since 1990

None
Date: June 28, 2004
Creator: unknown
Object Type: Report
System: The UNT Digital Library