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Financial Management: Some DOD Contractors Abuse the Federal Tax System with Little Consequence (open access)

Financial Management: Some DOD Contractors Abuse the Federal Tax System with Little Consequence

A letter report issued by the General Accounting Office with an abstract that begins "GAO was asked to determine (1) the magnitude of unpaid federal taxes owed by Department of Defense (DOD) contractors, (2) whether indications exist of abuse or criminal activity by DOD contractors related to the federal tax system, (3) whether DOD and the Internal Revenue Service (IRS) have effective processes and controls in place to use the Treasury Offset Program (TOP) in collecting unpaid federal taxes from DOD contractors, and (4) whether DOD contractors with unpaid federal taxes are prohibited by law from receiving contracts from the federal government."
Date: February 12, 2004
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Afghanistan Security: Corrective Actions Are Needed to Address Serious Accountability Concerns about Weapons Provided to Afghan National Security Forces (open access)

Afghanistan Security: Corrective Actions Are Needed to Address Serious Accountability Concerns about Weapons Provided to Afghan National Security Forces

Testimony issued by the Government Accountability Office with an abstract that begins "This testimony discusses the GAO report on accountability for small arms and light weapons that the United States has obtained and provided or intends to provide to the Afghan National Security Forces (ANSF)--the Afghan National Army and the Afghan National Police. Given the unstable security conditions in Afghanistan, the risk of loss and theft of these weapons is significant, which makes this hearing particularly timely. This testimony today focuses on (1) the types and quantities of weapons the Department of Defense (Defense) has obtained for ANSF, (2) whether Defense can account for the weapons it obtained for ANSF, and (3) the extent to which ANSF can properly safeguard and account for its weapons and other sensitive equipment."
Date: February 12, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Military Health: Increased TRICARE Eligibility for Reservists Presents Educational Challenges (open access)

Military Health: Increased TRICARE Eligibility for Reservists Presents Educational Challenges

A letter report issued by the Government Accountability Office with an abstract that begins "Since 2001, the number of reservists mobilized for active duty has increased dramatically. Congress has expanded reservists' and their dependents' eligibility for TRICARE, the Department of Defense's (DOD) health insurance program. The National Defense Authorization Act (NDAA) for Fiscal Year 2004 directed GAO to examine the health insurance coverage of reservists and their dependents. This report (1) identifies the extent to which reservists have civilian health insurance, (2) examines DOD's efforts to educate reservists and their dependents about TRICARE, and (3) describes reservists' level of satisfaction with TRICARE and the types of problems reservists and their dependents experienced when using it. To do this, GAO relied on interviews with DOD and DOD's survey data. GAO also administered a survey of TRICARE benefit assistance coordinators."
Date: February 12, 2007
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Head Start: A More Comprehensive Risk Management Strategy and Data Improvements Could Further Strengthen Program Oversight (open access)

Head Start: A More Comprehensive Risk Management Strategy and Data Improvements Could Further Strengthen Program Oversight

A letter report issued by the Government Accountability Office with an abstract that begins "In February 2005, GAO issued a report that raised concerns about the effectiveness of the Department of Health and Human Services (HHS) Administration for Children and Families' (ACF) oversight of about 1,600 local organizations that receive nearly $7 billion in Head Start grants. GAO was asked to report on (1) ACF's progress in conducting a risk assessment of the Head Start program and ensuring the accuracy and reliability of data from its annual Program Information Report (PIR) survey of grantees, (2) efforts to improve on-site monitoring of grantees, and (3) how data are used to improve oversight and help grantees meet program standards. For this report, GAO surveyed a nationally representative sample of Head Start program directors and interviewed ACF officials. GAO also reviewed ACF studies on the validity of PIR data and conducted tests of data from the 2006 PIR database."
Date: February 12, 2008
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Public Health Preparedness: Response Capacity Improving, but Much Remains to Be Accomplished (open access)

Public Health Preparedness: Response Capacity Improving, but Much Remains to Be Accomplished

Testimony issued by the General Accounting Office with an abstract that begins "The anthrax incidents in the fall of 2001 and the severe acute respiratory syndrome (SARS) outbreak in 2002-2003 have raised concerns about the nation's ability to respond to a major public health threat, whether naturally occurring or the result of bioterrorism. The anthrax incidents strained the public health system, including laboratory and workforce capacities, at the state and local levels. The SARS outbreak highlighted the challenges of responding to new and emerging infectious disease. The current influenza season has heightened concerns about the nation's ability to handle a pandemic. GAO was asked to examine improvements in state and local preparedness for responding to major public health threats and federal and state efforts to prepare for an influenza pandemic. This testimony is based on GAO's recent report, HHS Bioterrorism Preparedness Programs: States Reported Progress but Fell Short of Program Goals for 2002, GAO-04- 360R (Feb. 10, 2004). This testimony also updates information contained in GAO's report on federal and state planning for an influenza pandemic, Influenza Pandemic: Plan Needed for Federal and State Response, GAO- 01-4 (Oct. 27, 2000)."
Date: February 12, 2004
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Small Business Administration: Additional Guidance on Documenting Credit Elsewhere Decisions Could Improve 7(a) Program Oversight (open access)

Small Business Administration: Additional Guidance on Documenting Credit Elsewhere Decisions Could Improve 7(a) Program Oversight

A letter report issued by the Government Accountability Office with an abstract that begins "The Small Business Administration's (SBA) 7(a) program is intended to provide loan guarantees to small business borrowers who cannot obtain conventional credit at reasonable terms and do not have the personal resources to provide financing themselves. In fiscal year 2008, SBA guaranteed over 69,000 loans valued at about $13 billion. To assist in oversight of the 7(a) program, GAO was asked to (1) describe SBA's criteria and lenders' practices for determining that borrowers cannot obtain credit elsewhere and (2) examine SBA's efforts to ensure that lenders are complying with the credit elsewhere provision. To meet these objectives, GAO reviewed applicable statutes and guidance, visited 18 lenders and reviewed 238 of their loan files, reviewed 97 on-site lender review reports, and interviewed SBA officials. GAO's samples of lenders and loan files were not generalizable."
Date: February 12, 2009
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Bank Secrecy Act: Federal Agencies Should Take Action to Further Improve Coordination and Information-Sharing Efforts (open access)

Bank Secrecy Act: Federal Agencies Should Take Action to Further Improve Coordination and Information-Sharing Efforts

A letter report issued by the Government Accountability Office with an abstract that begins "The legislative framework for combating money laundering began with the Bank Secrecy Act (BSA) in 1970 and most recently expanded in 2001with the USA PATRIOT Act. The Financial Crimes Enforcement Network (FinCEN) administers BSA and relies on multiple federal and state agencies to ensure financial institution compliance. GAO was asked to (1) describe how BSA compliance and enforcement responsibilities are distributed, (2) describe how agencies other than FinCEN are implementing those responsibilities and evaluate their coordination efforts, and (3) evaluate how FinCEN is implementing its BSA responsibilities. Among other things, GAO reviewed legislation, past GAO and Treasury reports, and agreements and guidance from all relevant agencies; and interviewed agency, association, and financial institution officials."
Date: February 12, 2009
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Natural Resource Management: Opportunities Exist to Enhance Federal Participation in Collaborative Efforts to Reduce Conflicts and Improve Natural Resource Conditions (open access)

Natural Resource Management: Opportunities Exist to Enhance Federal Participation in Collaborative Efforts to Reduce Conflicts and Improve Natural Resource Conditions

A letter report issued by the Government Accountability Office with an abstract that begins "Conflict over the use of our nation's natural resources, along with increased ecological problems, has led land managers to seek cooperative means to resolve natural resource conflicts and problems. Collaborative resource management is one such approach that communities began using in the 1980s and 1990s. A 2004 Executive Order on Cooperative Conservation encourages such efforts. GAO was asked to determine (1) experts' views on collaborative resource management, (2) how selected collaborative efforts have addressed conflicts and improved resources, and (3) challenges that agencies face as they participate in such efforts and how the Cooperative Conservation initiative has addressed them. GAO reviewed experts' journal articles, studied seven collaborative groups, and interviewed group members and federal and other public officials."
Date: February 12, 2008
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Potential Terrorist Attacks: Additional Actions Needed to Better Prepare Critical Financial Market Participants (open access)

Potential Terrorist Attacks: Additional Actions Needed to Better Prepare Critical Financial Market Participants

A chapter report issued by the General Accounting Office with an abstract that begins "September 11 exposed the vulnerability of U.S. financial markets to wide-scale disasters. Because the markets are vital to the nation's economy, GAO assessed (1) the effects of the attacks on market participants' facilities and telecommunications and how prepared participants were for attacks at that time, (2) physical and information security and business continuity plans market participants had in place after the attacks, and (3) regulatory efforts to improve preparedness and oversight of market participants' risk reduction efforts."
Date: February 12, 2003
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Iraq and Afghanistan: Availability of Forces, Equipment, and Infrastructure Should Be Considered in Developing U.S. Strategy and Plans (open access)

Iraq and Afghanistan: Availability of Forces, Equipment, and Infrastructure Should Be Considered in Developing U.S. Strategy and Plans

Testimony issued by the Government Accountability Office with an abstract that begins "The United States is in the process of developing its strategy for operations in Afghanistan, as well as for the drawdown and continued operations of forces in Iraq. As of December 2008, approximately 32,500 U.S. troops were deployed in Afghanistan. Moreover, DOD may add an additional 30,000 troops in Afghanistan. Since 2001, the war in Afghanistan changed from a violent struggle against al Qaeda and its Taliban supporters to a multi-faceted counterinsurgency effort. As of December 2008, U.S. troops in Iraq numbered approximately 148,500. DOD also had about 162,400 contractors in Iraq as of mid-2008. Today's testimony addresses (1) key observations regarding the development of U.S. strategy in Iraq and Afghanistan; (2) factors that should be considered as the United States refines its strategy for Iraq and plans to draw down forces; and (3) factors that should be considered as the United States develops a strategy for Afghanistan and plans for increasing forces. This statement is based on GAO reports and testimonies on Iraq and Afghanistan."
Date: February 12, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Wildland Fire Management: Federal Agencies Lack Key Long- and Short-Term Management Strategies for Using Program Funds Effectively (open access)

Wildland Fire Management: Federal Agencies Lack Key Long- and Short-Term Management Strategies for Using Program Funds Effectively

Testimony issued by the Government Accountability Office with an abstract that begins "The nation's wildland fire problems have worsened over the past decade. Recent years have seen dramatic increases in the number of acres burned and the dollars spent on preparing for and responding to wildland fires. As GAO has previously reported, a number of factors have contributed to worsening fire seasons and increased firefighting expenditures, including an accumulation of fuels due to past land management practices; drought and other stresses, in part related to climate change; and an increase in human development in or near wildlands. Recent GAO reports have identified shortcomings in the approach to wildland fire management taken by the responsible federal agencies--the Department of Agriculture's Forest Service and four agencies within the Department of the Interior. GAO was asked to testify on agency efforts to (1) develop a cohesive strategy for preparing for and responding to wildland fire, (2) contain federal expenditures related to wildland fire, and (3) improve the processes used to allocate funds for reducing accumulated fuels and to select fuel reduction projects. GAO also is providing preliminary findings from its ongoing review of an interagency budget allocation and planning model known as fire …
Date: February 12, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Food Assistance: Potential to Serve More WIC Infants by Reducing Formula Cost (open access)

Food Assistance: Potential to Serve More WIC Infants by Reducing Formula Cost

A letter report issued by the General Accounting Office with an abstract that begins "The Department of Agriculture's Food and Nutrition Service (FNS) provided about $3 billion to state agencies in fiscal year 2001 for food assistance, including infant formula, through its Special Supplemental Nutrition Program for Women, Infants and Children (WIC). Most infants receiving formula are given a milk- or soy-based standard formula. To stretch program dollars, each state WIC agency contracts with a single company for purchases of that company's standard formula for which they receive rebates. These rebates totaled $1.4 billion in fiscal year 2001. Rebates do not apply to other companies' brands of standard formula (noncontract standard formula) or to nonstandard formulas designed to meet special medical or dietary conditions. GAO was directed to examine the extent that WIC agencies have restricted the use of noncontract standard formula to lower cost of the WIC program."
Date: February 12, 2003
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Potential Terrorist Attacks: Additional Actions Needed to Better Prepare Critical Financial Market Participants (open access)

Potential Terrorist Attacks: Additional Actions Needed to Better Prepare Critical Financial Market Participants

A chapter report issued by the General Accounting Office with an abstract that begins "September 11 exposed the vulnerability of U.S. financial markets to wide-scale disasters. Because the markets are vital to the nation's economy, GAO assessed (1) the effects of the attacks on market participants' facilities and telecommunications and how prepared participants were for attacks at that time, (2) physical and information security and business continuity plans market participants had in place after the attacks, and (3) regulatory efforts to improve preparedness and oversight of market participants' risk reduction efforts."
Date: February 12, 2003
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Primary Care Professionals: Recent Supply Trends, Projections, and Valuation of Services (open access)

Primary Care Professionals: Recent Supply Trends, Projections, and Valuation of Services

Testimony issued by the Government Accountability Office with an abstract that begins "Most of the funding for programs under title VII of the Public Health Service Act goes toward primary care medicine and dentistry training and increasing medical student diversity. Despite a longstanding objective of title VII to increase the total supply of primary care professionals, health care marketplace signals suggest an undervaluing of primary care medicine, creating a concern about the future supply of primary care professionals--physicians, physician assistants, nurse practitioners, and dentists. This concern comes at a time when there is growing recognition that greater use of primary care services and less reliance on specialty services can lead to better health outcomes at lower cost. GAO was asked to focus on (1) recent supply trends for primary care professionals, including information on training and demographic characteristics; (2) projections of future supply for primary care professionals, including the factors underlying these projections; and (3) the influence of the health care system's financing mechanisms on the valuation of primary care services. GAO obtained data from the Health Resources and Services Administration (HRSA) and organizations representing primary care professionals. GAO also reviewed relevant literature and position statements of these organizations."
Date: February 12, 2008
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Aviation Security: Challenges Exist in Stabilizing and Enhancing Passenger and Baggage Screening Operations (open access)

Aviation Security: Challenges Exist in Stabilizing and Enhancing Passenger and Baggage Screening Operations

Testimony issued by the General Accounting Office with an abstract that begins "Securing commercial aviation is a daunting task--with hundreds of airports and thousands of flights daily carrying millions of passengers and pieces of baggage. In an effort to strengthen the security of commercial aviation, the Transportation Security Administration (TSA) was created and charged with making numerous enhancements to aviation security, including federalizing passenger and baggage screening and screening checked baggage using explosive detection systems. To assess the progress of passenger and baggage screening operations, GAO was asked to describe TSA's efforts to (1) hire and deploy passenger and baggage screeners, (2) train the screening workforce, (3) measure screener performance in detecting threat objects, and (4) leverage and deploy screening equipment and technologies."
Date: February 12, 2004
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Potential Terrorist Attacks: More Actions Needed to Better Prepare Critical Financial Markets (open access)

Potential Terrorist Attacks: More Actions Needed to Better Prepare Critical Financial Markets

Testimony issued by the General Accounting Office with an abstract that begins "The September 11, 2001, terrorist attacks exposed the vulnerability of U.S. financial markets to wide-scale disasters. Because the markets are vital to the nation's economy, GAO's testimony discusses (1) how the financial markets were directly affected by the attacks and how market participants and infrastructure providers worked to restore trading; (2) the steps taken by 15 important financial market organizations to address physical security, electronic security, and business continuity planning since the attacks; and (3) the steps the financial regulators have taken to ensure that the markets are better prepared for future disasters."
Date: February 12, 2003
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
National Airspace System: Reauthorizing FAA Provides Opportunities and Options to Address Challenges (open access)

National Airspace System: Reauthorizing FAA Provides Opportunities and Options to Address Challenges

Testimony issued by the General Accounting Office with an abstract that begins "Much has changed since the Congress enacted the Wendell H. Ford Aviation Investment and Reform Act for the 21st Century (AIR-21) 3 years ago--the downturn in the nation's economy and the terrorist attacks of September 11, 2001, have taken a heavy toll on aviation. Competition for federal funding has also grown. The reauthorization of AIR-21 provides an opportunity for the Congress and the Federal Aviation Administration (FAA) to focus on several challenges to improving the national airspace system. These challenges include (1) funding planned airport capital development, (2) increasing capacity and efficiency, (3) implementing human capital and procurement reforms, and (4) ensuring aviation safety. This testimony is based on ongoing and published GAO work. The information on funding and development, obtained from FAA and the Airport Council International (ACI), a key organization representing the airport industry, is preliminary and therefore subject to change."
Date: February 12, 2003
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Homeland Security: Challenges Facing the Coast Guard as it Transitions to the New Department (open access)

Homeland Security: Challenges Facing the Coast Guard as it Transitions to the New Department

Testimony issued by the General Accounting Office with an abstract that begins "The Coast Guard is one of 22 agencies being placed in the new Department of Homeland Security. With its key roles in the nation's ports, waterways, and coastlines, the Coast Guard is an important part of enhanced homeland security efforts. But it also has non-security missions, such as search and rescue, fisheries and environmental protection, and boating safety. GAO has conducted a number of reviews of the Coast Guard's missions and was asked to testify about the Coast Guard's implementation challenges in moving to this newly created Department."
Date: February 12, 2003
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Transportation Research: The Department of Transportation Has Made Progress in Coordinating and Reviewing Its Research Activities (open access)

Transportation Research: The Department of Transportation Has Made Progress in Coordinating and Reviewing Its Research Activities

Testimony issued by the Government Accountability Office with an abstract that begins "Research, development, and technology (RD&T) activities are vital to meeting the Department of Transportation's (DOT) priorities, such as increasing safety, enhancing mobility, and supporting the nation's economic growth. In fiscal year 2008, the department's RD&T budget totaled over $1.1 billion, primarily for highway and aviation projects. Over the years, concerns have been raised about DOT's capabilities to improve RD&T coordination and evaluation efforts across the agency. In 2004, Congress created DOT's Research and Innovative Technology Administration (RITA) to coordinate and review the department's RD&T programs and activities for the purposes of reducing research duplication, enhancing opportunities for joint efforts, and ensuring RD&T activities are meeting goals. In 2006 GAO reported that RITA had made progress toward these ends, but needed to do more. GAO's testimony focuses on (1) the importance of coordinating and evaluating RD&T activities and (2) RITA's progress in implementing GAO's 2006 recommendations. GAO's statement is based on its 2006 report, a review of best practices for coordination and evaluation, and follow-up discussions with RITA officials on actions to implement GAO's recommendations. GAO did not assess whether RITA's actions have improved the effectiveness of the department's …
Date: February 12, 2009
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
[Minutes: Intelligence Joint Cross-Service Group, February 12, 2004] (open access)

[Minutes: Intelligence Joint Cross-Service Group, February 12, 2004]

BRAC 2005 Intelligence Joint Cross-Service Group Meeting Minutes of February 12, 2004. The document is redacted and includes the Brief to IJCSG Principals (PowerPoint slides).
Date: February 12, 2004
Creator: United States. Department of Defense.
Object Type: Text
System: The UNT Digital Library
Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluationof Technology and Potential (open access)

Toward Production From Gas Hydrates: Current Status, Assessment of Resources, and Simulation-Based Evaluationof Technology and Potential

Gas hydrates are a vast energy resource with global distribution in the permafrost and in the oceans. Even if conservative estimates are considered and only a small fraction is recoverable, the sheer size of the resource is so large that it demands evaluation as a potential energy source. In this review paper, we discuss the distribution of natural gas hydrate accumulations, the status of the primary international R&D programs, and the remaining science and technological challenges facing commercialization of production. After a brief examination of gas hydrate accumulations that are well characterized and appear to be models for future development and gas production, we analyze the role of numerical simulation in the assessment of the hydrate production potential, identify the data needs for reliable predictions, evaluate the status of knowledge with regard to these needs, discuss knowledge gaps and their impact, and reach the conclusion that the numerical simulation capabilities are quite advanced and that the related gaps are either not significant or are being addressed. We review the current body of literature relevant to potential productivity from different types of gas hydrate deposits, and determine that there are consistent indications of a large production potential at high rates over …
Date: February 12, 2008
Creator: Reagan, Matthew; Moridis, George J.; Collett, Timothy; Boswell, Ray; Kurihara, M.; Reagan, Matthew T. et al.
Object Type: Article
System: The UNT Digital Library
Surprising Coordination Geometry Differences in Ce(IV)- and Pu(IV)-Maltol Complexes (open access)

Surprising Coordination Geometry Differences in Ce(IV)- and Pu(IV)-Maltol Complexes

As part of a study to characterize the detailed coordination behavior of Pu(IV), single crystal X-ray diffraction structures have been determined for Pu(IV) and Ce(IV) complexes with the naturally-occurring ligand maltol (3-hydroxy-2-methyl-pyran-4-one) and its derivative bromomaltol (5-bromo-3-hydroxy-2-methyl-pyran-4-one). Although Ce(IV) is generally accepted as a structural analog for Pu(IV), and the maltol complexes of these two metals are isostructural, the corresponding bromomaltol complexes are strikingly different with respect to ligand orientation about the metal ion: All complexes exhibit trigonal dodecahedral coordination geometry but the Ce(IV)-bromomaltol complex displays an uncommon ligand arrangement not mirrored in the Pu(IV) complex, although the two metal species are generally accepted to be structural analogs.
Date: February 12, 2008
Creator: Laboratory, Lawrence Berkeley National; Raymond, Kenneth; Szigethy, Geza; Xu, Jide; Gorden, Anne E.V.; Teat, Simon J. et al.
Object Type: Article
System: The UNT Digital Library
Measurement of Time-Dependent CP Asymmetry in B0->ccbar K(*)0 Decays (open access)

Measurement of Time-Dependent CP Asymmetry in B0->ccbar K(*)0 Decays

The authors present updated measurements of time-dependent Cp asymmetries in fully reconstructed neutral B decays containing a charmonium meson. The measurements reported here use a data sample of (465 {+-} 5) x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric energy e{sup +}e{sup -} storage rings operating at the SLAC National Accelerator Laboratory. The time-dependent CP asymmetry parameters measured from J/{psi} K{sub S}{sup 0}, J/{psi}K{sub L}{sup 0}, {psi}(2S)K{sub S}{sup 0}, {eta}{sub c}K{sub S}{sup 0}, {chi}{sub c1}K{sub S}{sup 0} and J/{psi} K*(892){sup 0} decays are: C{sub f} = 0.024 {+-} 0.020(stat) {+-} 0.016(syst) and -{eta}{sub f}S{sub f} = 0.687 {+-} 0.028(stat) {+-} 0.012(syst).
Date: February 12, 2009
Creator: Aubert, B.
Object Type: Article
System: The UNT Digital Library
Quantum Calisthenics: Gaussians, The Path Integral and Guided Numerical Approximations (open access)

Quantum Calisthenics: Gaussians, The Path Integral and Guided Numerical Approximations

It is apparent to anyone who thinks about it that, to a large degree, the basic concepts of Newtonian physics are quite intuitive, but quantum mechanics is not. My purpose in this talk is to introduce you to a new, much more intuitive way to understand how quantum mechanics works. I begin with an incredibly easy way to derive the time evolution of a Gaussian wave-packet for the case free and harmonic motion without any need to know the eigenstates of the Hamiltonian. This discussion is completely analytic and I will later use it to relate the solution for the behavior of the Gaussian packet to the Feynman path-integral and stationary phase approximation. It will be clear that using the information about the evolution of the Gaussian in this way goes far beyond what the stationary phase approximation tells us. Next, I introduce the concept of the bucket brigade approach to dealing with problems that cannot be handled totally analytically. This approach combines the intuition obtained in the initial discussion, as well as the intuition obtained from the path-integral, with simple numerical tools. My goal is to show that, for any specific process, there is a simple Hilbert space interpretation …
Date: February 12, 2009
Creator: Weinstein, Marvin
Object Type: Article
System: The UNT Digital Library