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Dirty air conditioners: Energy implications of coil fouling

Dirty air conditioners: Energy implications of coil fouling

Date: March 1, 2002
Creator: Siegel, Jeffrey; Walker, Iain & Sherman, Max
Description: Residential air conditioning is responsible for a substantial amount of peak electrical demand and energy consumption throughout most of the United States. Coil fouling, the deposition of indoor dusts and other particulate matter on evaporator heat exchangers, increases system pressure drop and, correspondingly, decreases system air flow and air conditioner performance. In this paper, we apply experimental and simulation results describing particle deposition on evaporator coils as well as research about indoor particle and dust concentrations to determine coil fouling rates. The results suggest that typical coils foul enough to double evaporator pressure drop in about 7.5 years, much sooner than the expected 15-30 year life time for an evaporator coil. The most important parameters in determining coil fouling times are the efficiency of the filter and indoor particle concentrations, although filter bypass and duct and coil design are important as well. The reduced air flows that result from coil fouling cause typical efficiency and capacity degradations of less than 5%, however they can be much greater for marginal systems or extreme conditions. These energy issues, as well as possible indoor air quality issues resulting from fouling by biological aerosols, suggest that regular coil cleaning to ameliorate low flow and ...
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”Dirty Bombs”: Background in Brief

”Dirty Bombs”: Background in Brief

Date: June 24, 2011
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
“Dirty Bombs”: Technical Background, Attack Prevention and Response, Issues for Congress

“Dirty Bombs”: Technical Background, Attack Prevention and Response, Issues for Congress

Date: June 24, 2011
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
DIS prospects at the future muon collider facility

DIS prospects at the future muon collider facility

Date: July 1, 1998
Creator: Yu, J., FERMI
Description: We discuss prospects of deep inelastic scattering physics capabilities at the future muon collider facility. In addition to {mu}{sup +}{mu}{sup -} collider itself, the facility provides other possibilities. Among the possibilities, we present muon-proton collider and neutrino fixed target programs at the muon collider facility. This {mu}-p collider program extends kinematic reach and luminosity by an order of magnitude, increasing the possibility of search for new exotic particles. Perhaps most intriguing DIS prospects come from utilizing high intensity neutrino beam resulting from continuous decays of muons in various sections of the muon collider facility. One of the most interesting findings is a precision measurement of electroweak mixing angle, sin{sup 2}{theta}{sub W}, which can be achieved to the precision equivalent to {delta}M{sub W}{approximately} 30MeV.
Contributing Partner: UNT Libraries Government Documents Department
DISA Certification

DISA Certification

Date: August 11, 2005
Creator: United States. Dept. of Defense.
Description: Memorandum For Record - Certification of Defense Information Systems Agency(DIS)PoP- Additional DFAS Location Data.
Contributing Partner: UNT Libraries Government Documents Department
DISA Continuity of Operations and Test Facility Slidell, Louisiana

DISA Continuity of Operations and Test Facility Slidell, Louisiana

Date: August 3, 2005
Creator: unknown
Description: Community Input - Report gathered outlining the resources and services Slidell provides, and also how Leased Space Slidell meets BRAC Commission criteria for institutions to be kept open.
Contributing Partner: UNT Libraries Government Documents Department
Disability Benefits Available Under the Social Security Disability Insurance (SSDI) and Veterans Disability Compensation (VDC) Programs

Disability Benefits Available Under the Social Security Disability Insurance (SSDI) and Veterans Disability Compensation (VDC) Programs

Date: June 17, 2010
Creator: Moulta-Ali, Umar
Description: This report seeks to clarify why one group of individuals with disabilities may be eligible for benefits under Veteran's Disability Compensation (VDC), but ineligible for benefits under Social Security Disability Insurance (SSDI) (and vice versa), through a description and comparison of several distinguishing characteristics of the SSDI and VDC programs. This report concludes with a discussion of the challenges facing the administration of both programs, including processing delays for pending claims and appeals.
Contributing Partner: UNT Libraries Government Documents Department
Disability Benefits Available Under the Social Security Disability Insurance (SSDI) and Veterans Disability Compensation (VDC) Programs

Disability Benefits Available Under the Social Security Disability Insurance (SSDI) and Veterans Disability Compensation (VDC) Programs

Date: September 12, 2012
Creator: Moulta-Ali, Umar
Description: This report seeks to clarify why one group of individuals with disabilities may be eligible for benefits under Veteran's Disability Compensation (VDC), but ineligible for benefits under Social Security Disability Insurance (SSDI) (and vice versa), through a description and comparison of several distinguishing characteristics of the SSDI and VDC programs. This report concludes with a discussion of the challenges facing the administration of both programs, including processing delays for pending claims and appeals.
Contributing Partner: UNT Libraries Government Documents Department
Disability Benefits Available Under the Social Security Disability Insurance (SSDI) and Veterans Disability Compensation (VDC) Programs

Disability Benefits Available Under the Social Security Disability Insurance (SSDI) and Veterans Disability Compensation (VDC) Programs

Date: January 23, 2014
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Disability Benefits Available Under the Social Security Disability Insurance (SSDI) and Veterans Disability Compensation (VDC) Programs

Disability Benefits Available Under the Social Security Disability Insurance (SSDI) and Veterans Disability Compensation (VDC) Programs

Date: August 8, 2011
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Disability Benefits: Benefit Amounts for Military Personnel and Civilian Public Safety Officers Vary by Program Provisions and Individual Circumstances

Disability Benefits: Benefit Amounts for Military Personnel and Civilian Public Safety Officers Vary by Program Provisions and Individual Circumstances

Date: April 7, 2006
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "Military personnel, as well as civilian public safety officers (PSO), risk their lives and face the prospect of incurring disabilities as they protect and defend the general public on a daily basis. To help assess the appropriateness of disability benefits available to military personnel, Congress mandated that GAO study the disability benefits available to federal, state, and local government employees who serve the public in high-risk occupations and are injured in the line of duty. In response, GAO compared the disability benefits available to military personnel with the disability benefits available to civilian PSOs at the federal level, and in six states and six cities that were selected to illustrate the range of benefits provided. This study focuses on benefits provided to law enforcement officers and firefighters at the federal level, to state police at the state level, and to firefighters at the local level. For each program included in the review, GAO identified the benefits available for temporary disability, permanent partial disability, and permanent total disability, and then calculated the lifetime present value of the benefits provided to various hypothetical individuals in different circumstances. Cognizant ...
Contributing Partner: UNT Libraries Government Documents Department
Disability Employment: Further Action Needed to Oversee Efforts to Meet Federal Government Hiring Goals

Disability Employment: Further Action Needed to Oversee Efforts to Meet Federal Government Hiring Goals

Date: May 25, 2012
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Office of Personnel Management (OPM) and the Department of Labor (Labor) have taken steps to implement the executive order and help agencies recruit, hire, and retain more employees with disabilities. OPM provided guidance to help agencies develop disability hiring plans and reviewed the 66 plans submitted. OPM identified deficiencies in most of the plans. For example, though 40 of 66 agencies included a process for increasing the use of a special hiring authority to increase the hiring of people with disabilities, 59 agencies did not meet all of OPM’s review criteria, and 32 agencies had not addressed plan deficiencies as of April 2012. In response to executive order reporting requirements, OPM officials said they had briefed the White House on issues related to implementation, but they did not provide information on deficiencies in all plans. While the order does not specify what information these reports should include beyond addressing progress, providing information on deficiencies would enable the White House to hold agencies accountable. OPM is still developing the mandatory training programs for officials on the employment of individuals with disabilities, as required by the executive ...
Contributing Partner: UNT Libraries Government Documents Department
Disability Evaluation of Military Servicemembers

Disability Evaluation of Military Servicemembers

Date: January 27, 2009
Creator: Scott, Christine; Panangala, Sidath V.; Henning, Charles A. & Szymendera, Scott
Description: This report is intended as a primer to describe disability evaluation in general, including evaluations used by the Department of Defense (DOD) and the Department of Veterans Affairs (VA), in addition to civilian evaluations used by the Social Security Administration (SSA) and by workers' compensation programs. It also describes the DOD and VA disability rating processes in greater detail as well as recent congressional and executive actions and recommendations regarding DOD and VA disability evaluations.
Contributing Partner: UNT Libraries Government Documents Department
Disability Evaluation of Military Servicemembers

Disability Evaluation of Military Servicemembers

Date: October 21, 2008
Creator: Scott, Christine; Panangala, Sidath V. & Henning, Charles A.
Description: This report is intended as a primer to describe disability evaluation in general, including evaluations used by the Department of Defense (DOD) and the Department of Veterans Affairs (VA), in addition to civilian evaluations used by the Social Security Administration (SSA) and by workers' compensation programs.
Contributing Partner: UNT Libraries Government Documents Department
Disability Evaluation of Military Servicemembers

Disability Evaluation of Military Servicemembers

Date: May 7, 2007
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Disability Evaluation of Military Servicemembers

Disability Evaluation of Military Servicemembers

Date: January 27, 2010
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Disability Evaluation of Military Servicemembers

Disability Evaluation of Military Servicemembers

Date: January 30, 2008
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Disability Insurance: Preliminary Observations on SSA Efforts to Detect, Prevent, and Recover Overpayments

Disability Insurance: Preliminary Observations on SSA Efforts to Detect, Prevent, and Recover Overpayments

Date: June 14, 2011
Creator: United States. Government Accountability Office.
Description: Testimony issued by the Government Accountability Office with an abstract that begins "The Social Security Administration's (SSA) Disability Insurance (DI) program paid almost $123 billion in benefits in fiscal year 2010 to more than 10 million workers and dependents. The program has grown rapidly in recent years and is poised to grow further as the baby boom generation ages. GAO examined (1) what is known about the extent SSA makes work-related overpayments to, and recovers overpayments from, DI beneficiaries, and (2) SSA's policies and procedures for work continuing disability reviews (work CDRs) and potential DI program vulnerabilities that may contribute to overpayments to beneficiaries who have returned to work. To answer these questions, GAO reviewed work CDR policies and procedures, interviewed SSA headquarters and processing center officials, and visited 4 of 8 processing centers. We reviewed a random nongeneralizable sample of 60 CDR case files across those 4 centers to ensure we had a wide range of cases for our review (15 cases from each). These 4 centers received almost 80 percent of all work CDRs from SSA's Internal Revenue Service enforcement data match in fiscal year 2009."
Contributing Partner: UNT Libraries Government Documents Department
Disability Insurance: SSA Can Improve Efforts to Detect, Prevent, and Recover Overpayments

Disability Insurance: SSA Can Improve Efforts to Detect, Prevent, and Recover Overpayments

Date: July 27, 2011
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Social Security Administration's (SSA) Disability Insurance (DI) program paid almost $123 billion in benefits in fiscal year 2010 to more than 10 million workers and dependents. The program is poised to grow further as the baby boom generation ages. GAO examined (1) what is known about the extent to which SSA makes overpayments to, and recovers overpayments from, DI beneficiaries who exceed program earnings guidelines, and (2) potential DI program vulnerabilities that may contribute to overpayments to beneficiaries who have returned to work. To answer these questions, GAO reviewed work continuing disability review (work CDR) policies and procedures, interviewed SSA headquarters and processing center officials, visited 4 of 8 processing centers, and reviewed a random nongeneralizable sample of 60 CDR case files across those 4 centers (15 from each)."
Contributing Partner: UNT Libraries Government Documents Department
Disability Insurance: SSA Should Strengthen Its Efforts to Detect and Prevent Overpayments

Disability Insurance: SSA Should Strengthen Its Efforts to Detect and Prevent Overpayments

Date: September 10, 2004
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Social Security Administration's (SSA) Disability Insurance (DI) program is one of the nation's largest cash assistance programs for disabled workers. In fiscal year 2003, the DI program provided about $70 billion in financial assistance to approximately 7.5 million disabled workers, their spouses, and dependent children. This program has grown in recent years and is poised to grow further as the baby boom generation ages. The Senate Committee on Finance asked GAO to (1) determine the amount of overpayments in the DI program, particularly those attributable to earnings or work activity, and (2) identify any vulnerabilities in SSA's processes and policies for verifying earnings that may contribute to work-related overpayments."
Contributing Partner: UNT Libraries Government Documents Department
Disability Insurance: Work Activity Indicates Certain Social Security Disability Insurance Payments Were Potentially Improper

Disability Insurance: Work Activity Indicates Certain Social Security Disability Insurance Payments Were Potentially Improper

Date: August 15, 2013
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "On the basis of analyzing Social Security Administration (SSA) data on individuals who were Disability Insurance (DI) beneficiaries as of December 2010 and earnings data from the National Directory of New Hires (NDNH), GAO estimates that SSA made $1.29 billion in potential cash benefit overpayments to about 36,000 individuals as of January 2013. The exact number of individuals who received improper disability payments and the exact amount of improper payments made to those individuals cannot be determined without detailed case investigations by SSA. These DI beneficiaries represent an estimated 0.4 percent of all primary DI beneficiaries as of December 2010. Using a different methodology that includes additional causes of overpayments not considered in GAO's analysis, SSA estimated its DI overpayments in fiscal year 2011 were $1.62 billion, or 1.27 percent of all DI benefits in that fiscal year. GAO estimated DI program overpayments on the basis of work activity performed by two populations of individuals. The first population received potential overpayments due to work activity during the DI program's mandatory 5-month waiting period--a statutory program requirement to help ensure that SSA does not pay benefits to ...
Contributing Partner: UNT Libraries Government Documents Department
Disability Programs: SSA Has Taken Steps to Address Conflicting Court Decisions, but Needs to Manage Data Better on the Increasing Number of Court Remands

Disability Programs: SSA Has Taken Steps to Address Conflicting Court Decisions, but Needs to Manage Data Better on the Increasing Number of Court Remands

Date: April 5, 2007
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Social Security Administration's (SSA) Disability Insurance and Supplemental Security Income programs provided around $128 billion to about 12.8 million persons with disabilities and their families in fiscal year 2005. Claimants who are denied benefits by SSA may appeal to federal courts. Through current initiatives, SSA is attempting to reduce the number of cases appealed to courts and remanded back to SSA for further review. In addition, there have been long-standing concerns about how SSA responds to court decisions that conflict with its policies. GAO was asked to examine: (1) trends over the past decade in the number of appeals reviewed by the courts and their decisions, (2) reasons for court remands and factors contributing to them, and (3) SSA's process for responding to court decisions that conflict with agency policy. GAO reviewed SSA data and documents on court decisions, remands and SSA's processes and interviewed agency officials and stakeholders on data trends, reasons for remands, and SSA processes."
Contributing Partner: UNT Libraries Government Documents Department
Disability Retirement for Federal Employees

Disability Retirement for Federal Employees

Date: March 25, 2014
Creator: Isaacs, Katelin P.
Description: This report describes recent trends in the number of civil service annuitants and the financial status of the Civil Service Retirement and Disability Fund.
Contributing Partner: UNT Libraries Government Documents Department
Disability Retirement for Federal Employees

Disability Retirement for Federal Employees

Date: September 30, 2010
Creator: Isaacs, Katelin P.
Description: This report briefly discusses sick leave policies for federal civilian employees, as well as disability benefits available under the Federal Employees' Compensation Act (FECA).
Contributing Partner: UNT Libraries Government Documents Department