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Davis-Bacon Suspension and Its Legislative Aftermath

Description: During the last week of August 2005, Hurricane Katrina gathered strength in the Atlantic and moved against the gulf states. On September 8, 2005, amid the devastation left in Katrina’s wake, President George W. Bush suspended the Davis-Bacon Act as it applies to certain jurisdictions in Florida, Alabama, Mississippi, and Louisiana. Although the President has the authority, under Section 6 of the Act, to render such suspensions during a national emergency, that authority has rarely been utilized.1 This report analyzes the legislative aftermath of the suspension.
Date: October 3, 2005
Creator: Whittaker, William G.
Item Type: Report

Davis-Bacon: The Act and the Literature

Description: The Davis-Bacon Act of 1931, as amended, requires that contractors, engaging in certain federal contract construction, pay workers on such projects not less than the locally prevailing wage for comparable work. In addition, such contractors are required to file payroll reports and to meet other administrative and labor standards requirements. Included in this report is a bibliography of published materials dealing with the Davis-Bacon Act and related issues.
Date: November 13, 2007
Creator: Whittaker, William G.
Item Type: Report

Davis PV plant operation and maintenance manual

Description: This operation and maintenance manual contains the information necessary to run the Photovoltaics for Utility Scale Applications (PVUSA) test facility in Davis, California. References to more specific information available in drawings, data sheets, files, or vendor manuals are included. The PVUSA is a national cooperative research and demonstration program formed in 1987 to assess the potential of utility scale photovoltaic systems.
Date: September 1, 1994
Item Type: Report

The Dawn of Nuclear Photonics with Laser-based Gamma-rays

Description: A renaissance in nuclear physics is occurring around the world because of a new kind of incredibly bright, gamma-ray light source that can be created with short pulse lasers and energetic electron beams. These highly Mono-Energetic Gamma-ray (MEGa-ray) sources produce narrow, laser-like beams of incoherent, tunable gamma-rays and are enabling access and manipulation of the nucleus of the atom with photons or so called 'Nuclear Photonics'. Just as in the early days of the laser when photon manipulation of the valence electron structure of the atom became possible and enabling to new applications and science, nuclear photonics with laser-based gamma-ray sources promises both to open up wide areas of practical isotope-related, materials applications and to enable new discovery-class nuclear science. In the United States, the development of high brightness and high flux MEGa-ray sources is being actively pursued at the Lawrence Livermore National Laboratory in Livermore (LLNL), California near San Francisco. The LLNL work aims to create by 2013 a machine that will advance the state of the art with respect to source the peak brightness by 6 orders of magnitude. This machine will create beams of 1 to 2.3 MeV photons with color purity matching that of common lasers. In Europe a similar but higher photon energy gamma source has been included as part of the core capability that will be established at the Extreme Light Infrastructure Nuclear Physics (ELI-NP) facility in Magurele, Romania outside of Bucharest. This machine is expected to have an end point gamma energy in the range of 13 MeV. The machine will be co-located with two world-class, 10 Petawatt laser systems thus allowing combined intense-laser and gamma-ray interaction experiments. Such capability will be unique in the world. In this talk, Dr. Chris Barty from LLNL will review the state of the art with respect ...
Date: March 17, 2011
Creator: Barty, C J
Item Type: Article

Day-to-day oversight of National Laboratory MC&A programs

Description: The US Department of Energy`s (DOE) orders require that its Los Alamos Area Office (LAAO) oversee the day-to-day activities of the Los Alamos National Laboratory (LANL). Making that oversight unobtrusive is important to keep it from creating additional burdens of reports and programs for the LANL. LAAO accomplishes day-to-day oversight of Material Control and Accountability (MC&A) at the LANL as an onsite observer of LANL`S in-house monitoring activities. Working guidelines established for the LAAO observer prevent us from hindering LANL`s program. A subset of MC&A activities that spans a wide range of MC&A programs with great sensitivity to functionality was selected for monitoring. Thus, timely ``finger on the pulse`` monitoring occurs without smothering the laboratory. LAAO and LANL Management negotiated implementation and observer guidance for the monitoring process. LAAO will apply the method used to other topical areas of the Safeguards and Security arena in the future.
Date: June 1, 1995
Creator: Sedlacek, W.A. & Flynn, A.B.
Item Type: Article

DAYCOR users manual

Description: The DAYton temperature CORrection model (DAYCOR) calculates the temperature correction that must be applied to the temperature measured by the VIZ radiosonde`s white rod thermistor to deduce the atmospheric temperature. The temperature correction calculation takes into account all the significant heat transfer processes that influence the temperature of the rod thermistor. These processes include the convective heat transfer with the air, the solar and infrared radiation absorbed by the thermistor, the radiation emitted by the thermistor, and the heat conducted to the thermistor through the lead wires. The DAYCOR model ignores the influence, on the thermistor, of reflected and emitted radiation from the balloon and radiosonde instrument. Luers`(1989) shows these influences to contribute less than 10% to the temperature correction. The heating of the thermistor from the electric current passing through the circuit is small and is also neglected in the model calculations.
Date: October 1, 1992
Creator: Luers, J. & Duda, C.
Item Type: Report

Daylight metrics and energy savings

Description: The drive towards sustainable, low-energy buildings has increased the need for simple, yet accurate methods to evaluate whether a daylit building meets minimum standards for energy and human comfort performance. Current metrics do not account for the temporal and spatial aspects of daylight, nor of occupants comfort or interventions. This paper reviews the historical basis of current compliance methods for achieving daylit buildings, proposes a technical basis for development of better metrics, and provides two case study examples to stimulate dialogue on how metrics can be applied in a practical, real-world context.
Date: December 31, 2009
Creator: Mardaljevic, John; Heschong, Lisa & Lee, Eleanor
Item Type: Article

Daylight Saving Time

Description: This report discusses Daylight Saving Time (DST), which is a period of the year between spring and fall when clocks in the United States are set one hour ahead of standard time. DST is currently observed in the United States from 2:00 a.m. on the second Sunday in March until 2:00 a.m. on the first Sunday in November.
Date: March 9, 2016
Creator: Cook, Beth
Item Type: Report

Daylight Saving Time

Description: Currently, in most parts of the United States, timepieces are moved forward one hour in the spring and back one hour in the fall to provide an extended daylight period during the summer months. This is known as Daylight Saving Time (DST). Much debate and many changes led to this present practice. This report provides a brief history of the issues surrounding DST, an outline of the legislation that created and modified it, and a list of references to more discussions.
Date: August 1, 2000
Creator: Yacker, Heidi G.
Item Type: Report

Daylight Saving Time

Description: Currently, in most parts of the United States, timepieces are moved forward one hour in the spring and back one hour in the fall to provide an extended daylight period during the summer months. This is known as Daylight Saving Time (DST). Much debate and many changes led to this present practice. This report provides a brief history of the issues surrounding DST, an outline of the legislation that created and modified it, and a list of references to more discussions.
Date: October 1, 2002
Creator: Yacker, Heidi G.
Item Type: Report

Daylight Saving Time

Description: Currently, in most parts of the United States, timepieces are moved forward one hour in the spring and back one hour in the fall to provide an extended daylight period during the summer months. This is known as Daylight Saving Time (DST). Much debate and many changes led to this present practice. This report provides a brief history of the issues surrounding DST, an outline of the legislation that created and modified it, and a list of references to more discussions.
Date: December 17, 2002
Creator: Yacker, Heidi G.
Item Type: Report

Daylight Saving Time

Description: Currently, in most parts of the United States, timepieces are moved forward one hour in the spring and back one hour in the fall to provide an extended daylight period during the summer months. This is known as Daylight Saving Time (DST). Much debate and many changes led to this present practice. This report provides a brief history of the issues surrounding DST, an outline of the legislation that created and modified it, and a list of references to more discussions.
Date: February 9, 1998
Creator: Yacker, Heidi G.
Item Type: Report

Daylight Saving Time

Description: Currently, in most parts of the United States, timepieces are moved forward one hour in the spring and back one hour in the fall to provide an extended daylight period during the summer months. This is known as Daylight Saving Time (DST). Much debate and many changes led to this present practice. This report provides a brief history of the issues surrounding DST, an outline of the legislation that created and modified it, and a list of references to more discussions.
Date: September 27, 2005
Creator: Gurevitz, Mark
Item Type: Report

Daylighting Calculation in DOE-2

Description: Lighting accounts for about 20% of total electrical energy consumption in the United States. Using natural lighting is a cost-effective way to reduce this consumption and, at the same time, enhance the quality of the indoor environment. For several years, architects and engineers have used scale models, hand calculator programs, and sophisticated main-frame computer programs (such as LUMEN-II) to determine levels of interior daylight for different building configurations. However, none of these tools determines the annual energy savings from daylighting, information which could have an important effect on design decisions. For this reason, a daylighting simulation has been added to DOE-2. Taken into account are such factors as window size, glass transmittance, inside surface reflectances of the space, sun-control devices such as blinds and overhangs, and the luminance distribution of the sky. Because this distribution depends on the position of the sun and the cloudiness of the sky, the calculation is made for standard clear- and overcast-sky conditions and for a series of 20 solar altitude and azimuth values covering the annual range of sun positions. The calculations are performed prior to the complete simulation, and the the resulting daylight factors are stored for later use. Analogous factors for glare are also calculated and stored. For the hourly envelope simulation, the illuminance from each window is found by interpolating the stored daylight factors (using the current-hour sun-position and cloud cover), then multiplying by the current-hour exterior horizontal illuminance. If the glare-control option has been specified, the program will automatically close window blinds or drapes to decrease glare below a pre-defined comfort level. Adding the illuminance contributions from all the windows gives the total number of footcandles at each reference point. This report describes the equations and algorithms used to perform the daylighting calculations in DOE-2.1B, and is intended as a ...
Date: November 1, 1982
Creator: Winkelmann, F.C
Item Type: Report