NASA Scientific and Technical Aerospace Reports

provide data from reference wetlands and document its use in calibrating model variables and assessment models, and (f)
outline the necessary protocols for applying the functional indices to the assessment of wetland functions.
DTIC
Handbooks; Hydrogeology; Rain; Structural Basins; Wetlands
20040111516 Slovak Academy of Sciences, Bratislava
Transverse Resistivity of YBCO Coated Conductors for AC Use
Polak, Milan; Aug. 2003; 49 pp.; In English
Contract(s)/Grant(s): FA8655-02-M4065
Report No.(s): AD-A425505; EOARD-SPC-02-4065; No Copyright; Avail: CASI; A03, Hardcopy
This report results from a contract tasking Institute of Electrical Engineering as follows: The contractor will investigate
transverse resistivity and factors controlling it in Yttrium Barium Copper Oxide (YBCO) based alternating current (AC)
superconductors. This investigation will study the properties of metallic layers deposited on YBCO and the boundary
resistivity of the boundary YBCO/metal. The results of this investigation will assist in determining the optimal amount and
location of the stabilizing metal assuring a sufficient stability and acceptable AC losses. Effect of local inhomogeneities on the
behavior of the conductors will be also studied.
DTIC
Alternating Current; Coatings; Conductors; Electrical Resistivity; Superconductors (Materials); Ybco Superconductors
20040111522 Air Force Research Lab., Edwards AFB, CA
Taming Hazardous Reactive Materials for Single Crystal X-ray Diffraction Studies: Dealing with Handling and
Disorder Nightmares
May 26, 2004; 15 pp.; In English
Contract(s)/Grant(s): Proj-DARP
Report No.(s): AD-A425523; AFRL-PR-ED-VG-2004-181; No Copyright; Avail: CASI; A03, Hardcopy
Partial Contents; The challenging transition I, The exciting world of high nitrogen chemistry, why Carbon forms polymers
and Nitrogen does not?, N-F compounds, What is So Unusal About the N5+ Cation?, Selection of Suitable Starting Materials
for N5+ Synthesis, Fluorodiazonium Salts; Crucial Intermediates in Polynitrogen Chemistry, Right Tools for the Right Job,
Fluorodiazonium Salts: Crucial Intermediates in Polynitrogen Chemistry, Right Tools for the Right Job, Reactions of
trans-N2F2 with SbF5?, Using ‘inert’ organic solvents, Recrystallization, Mounting using LT apparatus, Hungry for
cryoloops?, Ball and Stick Representation of NF4Sb2F11, Molecular Structure of N2F SbF6, Crystal Packing Diagram of N2F
SbF6(c-axis).
DTIC
Crystals; Hazardous Materials; Molecular Structure; Reactivity; Recrystallization; Single Crystals; X Ray Diffraction
20040111523 Engineering Research and Consulting, Inc., Edwards AFB, CA
Fluorpolymer Property Enhancement via Incorporation of Fluorinated Polyhedral Oligomeric Silsesquioxanes
(FluoroPOSS)
Mabry, Joseph M.; Marchant, Darrell; Viers, Brent D.; Ruth, Patrick N.; Barker, Scott; Mar. 12, 2004; 13 pp.; In English;
Original contains color illustrations
Contract(s)/Grant(s): F04611-99-C-0025; Proj-2303
Report No.(s): AD-A425526; No Copyright; Avail: CASI; A03, Hardcopy
Fluorinated Polyhedral Oligomeric Silsesquioxanes (FluoroPOSS) are the newest class of POSS compounds. These
compounds have the highest molecular weights and highest densities of any POSS compounds yet produced. They also have
remarkable surface properties, which have been observed in water contact angle measurements. A number of FluoroPOSS
compounds have been produced from their respective trifunctional monomers. These FluoroPOSS compounds have been
blended into several fluoropolymers, including fluorinated ethylene-propylene (FEP), poly(chlorotrifluoroethylene) (PCTFE),
and poly(vinylidene fluoride) (PVdF). The POSS blendables appear to be well dispersed in scanning electron microscopy
(SEM) and atomic force microscopy (AFM) spectra. These POSS fluoropolymers may be useful as low friction surfaces or
hydrophobic coatings. Contact angle measurements of the POSS fluoropolymers show an improvement in water contact angles
over the unfilled materials. The low surface energy POSS compounds also appear to act as a processing aid during
fluoropolymer processing, significantly reducing both the torque and load measurements in the extruder. Thermal and
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