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Measure Guideline: Window Repair, Rehabilitation, and Replacement

Description: This measure guideline provides information and guidance on rehabilitating, retrofitting, and replacing existing window assemblies in residential construction. The intent is to provide information regarding means and methods to improve the energy and comfort performance of existing wood window assemblies in a way that takes into consideration component durability, in-service operation, and long term performance of the strategies.
Date: December 1, 2012
Creator: Baker, P.
Partner: UNT Libraries Government Documents Department

External Insulation of Masonry Walls and Wood Framed Walls

Description: The use of exterior insulation on a building is an accepted and effective means to increase the overall thermal resistance of the assembly that also has other advantages of improved water management and often increased air tightness of building assemblies. For thin layers of insulation (1" to 1 1/2"), the cladding can typically be attached directly through the insulation back to the structure. For thicker insulation layers, furring strips have been added as a cladding attachment location. This approach has been used in the past on numerous Building America test homes and communities (both new and retrofit applications), and has been proven to be an effective and durable means to provide cladding attachment. However, the lack of engineering data has been a problem for many designers, contractors, and code officials. This research project developed baseline engineering analysis to support the installation of thick layers of exterior insulation on existing masonry and frame walls. Furthermore, water management details necessary to integrate windows, doors, decks, balconies and roofs were created to provide guidance on the integration of exterior insulation strategies with other enclosure elements.
Date: January 1, 2013
Creator: Baker, P.
Partner: UNT Libraries Government Documents Department

Finishing of precision generated metal optical components

Description: Diamond turning and precision generation of aspheric metal surfaces has promoted a change in lapping techniques due to the extremely close figure tolerances and surface finishes that have been achieved. Special tooling, diamond abrasive, silicon oil and special techniques used to polish the unusual aspheric figures are described. The studies include small flat diamond turned samples of copper, electroplated copper, electroplated silver, electroplated nickel and silver as well as large aspheres such as an f/0.75, 35 cm dia copper ellipse. Results from cleaning studies on flat samples using ultrasonics and vapor degreasers are also summarized. Interferograms of wavefront distortion and analysis of focal volume are included as well as 10.6 $mu$m reflectivity and a summary of laser damage experiments. (TFD)
Date: August 1, 1975
Creator: Baker, P.C. & Sonderman, J.B.
Partner: UNT Libraries Government Documents Department

1.06 μm 150 psec laser damage study of diamond turned, diamond turned/ polished and polished metal mirrors

Description: Using a well characterized 1.06 μm 150 ps glass laser pulse the damage characteristics for diamond turned, diamond turned/ polished, and polished copper and silver mirrors less than 5 cm diameter were studied. Although most samples were tested with a normal angle of incidence, some were tested at 45$sup 0$ with different linear polarization showing an increase in damage threshold for S polarization. Different damage mechanisms observed will be discussed. Laser damage is related to residual surface influences of the fabrication process. First attempts to polish diamond turned surfaces resulted in a significant decrease in laser damage threshold. The importance of including the heat of fusion in the one dimensional heat analysis of the theoretical damage threshold and how close the samples came to the theoretical damage threshold is discussed. (auth)
Date: July 24, 1975
Creator: Saito, T. T.; Milam, D.; Baker, P. & Murphy, G.
Partner: UNT Libraries Government Documents Department

Optical components for the Nova laser

Description: In addition to its other characteristics, the Nova Laser Fusion facility may well be the largest precision optical project ever undertaken. Moreover, during the course of construction, concurrent research and development has been successfully conducted, and has resulted in significant advances in various technical areas, including manufacturing efficiency. Although assembly of the first two beams of Nova is just commencing, the optical production, including construction of the special facilities required for many of the components, has been underway for over three years, and many phases of the optical manufacturing program for the first 10 beams will be completed within the next two years. On the other hand, new requirements for second and third harmonic generation have created the need to initiate new research and development. This work has been accomplished through the enormous cooperation DOE/LLNL has received from commercial industry on this project. In many cases, industry, where much of the optical component research and development and virtually all of the manufacturing is being done, has made substantial investment of its own funds in facilities, equipment, and research and development, in addition to those supplied by DOE/LLNL.
Date: May 17, 1982
Creator: Wallerstein, E.P.; Baker, P.C. & Brown, N.J.
Partner: UNT Libraries Government Documents Department

Experimental test of exchange degeneracy in hypercharge exchange reactions at 7 and 11. 5 GeV/c. [Cross sections]

Description: The two pairs of line-reversed reactions: ..pi../sup +/p ..-->.. K/sup +/..sigma../sup +/; K/sup -/p ..-->.. ..pi../sup -/..sigma../sup +/ and ..pi../sup +/p ..-->.. K/sup +/Y*(1385); K/sup -/p ..-->.. ..pi../sup -/Y*(1385) at two energies: 7 and 11.5 GeV/c were studied. The experiment was conducted in the SLAC 1 m rapid cycling bubble chamber triggered by electronic detectors and an online algorithm. The cross section excess for the K/sup -/ reactions which has shown exchange degeneracy violations at lower energy is still significant but smaller at 7 GeV/c. At 11.5 GeV/c it is found that both the helicity-flip and non-flip dominated processes are consistent with exchange degeneracy predictions. Polarization measurements of the ..sigma../sup +/ and Y* at both energies support dominance in the production process of exchange degenerate K*(890) vector and K*(1490) tensor trajectories. 9 references
Date: July 1, 1978
Creator: Baker, P.A.; Chima, J.S. & Dornan, P.J.
Partner: UNT Libraries Government Documents Department

Cladding Attachment Over Thick Exterior Insulating Sheathing

Description: The addition of insulation to the exterior of buildings is an effective means of increasing the thermal resistance of both wood framed walls as well as mass masonry wall assemblies. For thick layers of exterior insulation (levels greater than 1.5 inches), the use of wood furring strips attached through the insulation back to the structure has been used by many contractors and designers as a means to provide a convenient cladding attachment location (Straube and Smegal 2009, Pettit 2009, Joyce 2009, Ueno 2010). The research presented in this report is intended to help develop a better understanding of the system mechanics involved and the potential for environmental exposure induced movement between the furring strip and the framing. BSC sought to address the following research questions: 1. What are the relative roles of the mechanisms and the magnitudes of the force that influence the vertical displacement resistance of the system? 2. Can the capacity at a specified deflection be reliably calculated using mechanics based equations? 3. What are the impacts of environmental exposure on the vertical displacement of furring strips attached directly through insulation back to a wood structure?
Date: January 1, 2014
Creator: Baker, P.; Eng, P. & Lepage, R.
Partner: UNT Libraries Government Documents Department

Characterization of the antiferromagnetism in Ag(pyz)2(S2O8) with a two-dimensional square lattice of Ag 2+ ions (Ag=silver, Pyz-pyrdzine, S2O8=sulfate)

Description: X-ray powder diffraction and magnetic susceptibility measurements show that Ag(pyz){sub 2}(S{sub 2}O{sub 8}) consists of 2D square nets of Ag{sup 2+} ions resulting from the corner-sharing of axially elongated AgN{sub 4}O{sub 2} octahedra and exhibits characteristic 2D antiferromagnetism. Nevertheless, {mu}{sup +}Sr measurements indicate that Ag(pyz){sub 2}(S{sub 2}O{sub 8}) undergoes 3D magnetic ordering below 7.8(3) K.
Date: January 1, 2009
Creator: Singleton, John; Mc Donald, R; Sengupta, P; Cox, S; Manson, J; Southerland, H et al.
Partner: UNT Libraries Government Documents Department