747 research outputs found
SOFTWARE DEVELOPMENT CONTRACTS AND CONSULTING ARRANGEMENTS: A STRUCTURE FOR ENFORCEABILITY AND PRACTICALITY
SOFTWARE DEVELOPMENT CONTRACTS AND CONSULTING ARRANGEMENTS: A STRUCTURE FOR ENFORCEABILITY AND PRACTICALITY
Reviews
Francis Botto, Dictionary of Multimedia and Internet Applications ‐ A Guide for Developers and Users, Chichester, UK: John Wiley & Sons, 1999. ISBN: 0–471–986240. Hardback, x+362 pages, £34.95
Widespread Hydrogenation of the Moons South Polar Cold Traps
The study shows widespread evidence that the Moons permanently shadowed
regions (PSR) are enhanced in hydrogen, likely in the form of water ice, as
compared to non-permanently shadowed region locations (non-PSRs), to 79deg S.
Results are consistent with the original findings of Watson et al, 1961. We use
a novel method to aggregate the hydrogen response from all PSR, greater than 2
km wide pixels. Poleward of 79deg S, the PSR have a consistent hydrogen spatial
response, which is enhanced in PSR (where the PSRs area density is highest) and
diminishes with distance from any PSR (where the PSR area density is lowest). A
correlation between the PSRs diameters and their observed hydrogen, is induced
by the instrumental blurring of relatively hydrogenated PSR areas. An
anomalously enhanced hydrogen concentration observed at Cabeus-1 PSR suggests a
second hydrogen budget process at that location. Linear correlations, derived
from the PSRs hydrogen observations, from two independent latitude bands,
closely predict the hydrogen observation at Shoemaker, the largest area PSR, 1)
75deg to 83deg S, 2) 83deg to 90deg S. Results are consistent with ongoing
processes that introduce volatiles to the surface including outgassing, solar
wind production with regolith silicates, and mixing from small-scale meteor
impacts and diurnal temperature variation. Results are derived from the
Collimated Sensor for EpiThermal Neutrons (CSETN), which part of the Lunar
Exploration Neutron Detector (LEND), onboard the Lunar Reconnaissance Orbiter
(LRO).Comment: 27 pages, 14 Figure
Water-like anomalies for core-softened models of fluids: One dimension
We use a one-dimensional (1d) core-softened potential to develop a physical
picture for some of the anomalies present in liquid water. The core-softened
potential mimics the effect of hydrogen bonding. The interest in the 1d system
stems from the facts that closed-form results are possible and that the
qualitative behavior in 1d is reproduced in the liquid phase for higher
dimensions. We discuss the relation between the shape of the potential and the
density anomaly, and we study the entropy anomaly resulting from the density
anomaly. We find that certain forms of the two-step square well potential lead
to the existence at T=0 of a low-density phase favored at low pressures and of
a high-density phase favored at high pressures, and to the appearance of a
point at a positive pressure, which is the analog of the T=0 ``critical
point'' in the Ising model. The existence of point leads to anomalous
behavior of the isothermal compressibility and the isobaric specific heat
.Comment: 22 pages, 7 figure
Using systematic data categorisation to quantify the types of data collected in clinical trials: The DataCat project
Application of Acoustic Telemetry to Assess Residency and Movements of Rockfish and Lingcod at Created and Natural Habitats in Prince William Sound
Loss and/or degradation of nearshore habitats have led to increased efforts to restore or enhance many of these habitats, particularly those that are deemed essential for marine fishes. Copper rockfish (Sebastes caurinus) and lingcod (Ophiodon enlongatus) are dominant members of the typical reef fish community that inhabit rocky and high-relief substrates along the Pacific Northwest. We used acoustic telemetry to document their residency and movements in the nearshore waters of Prince William Sound, Alaska in order to assess use of created reef habitat in an individual-based manner. A total of 57 fish were surgically implanted with acoustic transmitters. Forty-five fish were captured and monitored in three habitats: artificial reef, low-relief natural reef, and patchy high-relief natural reef. Within each habitat, both rockfish and lingcod exhibited long periods of residency with limited movements. Twelve rockfish were captured at the natural reefs and displaced a distance of 4.0 km to the artificial reef. Five of the 12 rockfish returned within 10 d of their release to their initial capture site. Another five of the 12 displaced fish established residency at the artificial reef through the duration of our study. Our results suggest the potential for artificial reefs to provide rockfish habitat in the event of disturbances to natural habitat
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