31,008 research outputs found
Unquenched Studies Using the Truncated Determinant Algorithm
A truncated determinant algorithm is used to study the physical effects of
the quark eigenmodes associated with eigenvalues below 420 MeV. This initial
high statistics study focuses on coarse () lattices (with O()
improved gauge action), light internal quark masses and large physical volumes.
Three features of full QCD are examined: topological charge distributions,
string breaking as observed in the static energy and the eta prime mass.Comment: Lattice2001(confinement); 3pgs(Latex), 4figs.(ps
Current Developments in Services for People with Intellectual Disabilities
[Taken from Executive Summary]
This literature review is the culmination of the Saskatchewan Community Living Division jurisdictional study which began in the autumn of 2003. Following a brief survey of developments in providing services to people with intellectual disabilities (hitherto the People) for creating the questionnaire for this study, information was gleaned from the provinces and territories on their services. The CLD Jurisdictional Project was completed in the spring of 2005. Subsequently, a thorough search and examination of pertinent resources for serving this People and for policy development was conducted. From over 800 documents about 350 were selected for this literature review.
The material is recorded in the following chapters: Public Consultation and Policy Development; Social Philosophy: the philosophical influence on contemporary social issues; Definition of disabilities; Needs assessment systems; Human Rights; Advocacy; Community services & Deinstitutionalization; Issues and Influences; Citizenship; Inclusion; Self-determination; Person-centered planning; Supports; Respite; Individualized funding; Canadian governmental initiatives; Provincial Services
Innovative inorganic synthesis
No abstract available
Physical Effects of Infrared Quark Eigenmodes in LQCD
A truncated determinant algorithm is used to study the physical effects of
the quark eigenmodes associated with eigenvalues below 400 MeV. This initial
study focuses on coarse lattices (with O(a^2) improved gauge action), light
internal quark masses and large physical volumes. Four bellwether full QCD
processes are discussed: topological charge distributions, the eta prime
propagator, string breaking as observed in the static energy and the rho decay
into two pions.Comment: LATTICE99(Confinement); 3pgs(Latex), 4figs.(eps
Can Collimated Extraterrestrial Signals be Intercepted?
The Optical Search for Extraterrestrial Intelligence (OSETI) attempts to
detect collimated, narrowband pulses of electromagnetic radiation. These pulses
may either consist of signals intentionally directed at the Earth, or signals
between two star systems with a vector that unintentionally intersects the
Solar System, allowing Earth to intercept the communication. But should we
expect to be able to intercept these unintentional signals? And what
constraints can we place upon the frequency of intelligent civilisations if we
do?
We carry out Monte Carlo Realisation simulations of interstellar
communications between civilisations in the Galactic Habitable Zone (GHZ) using
collimated beams. We measure the frequency with which beams between two stars
are intercepted by a third. The interception rate increases linearly with the
fraction of communicating civilisations, and as the cube of the beam opening
angle, which is somewhat stronger than theoretical expectations, which we argue
is due to the geometry of the GHZ. We find that for an annular GHZ containing
10,000 civilisations, intersections are unlikely unless the beams are
relatively uncollimated.
These results indicate that optical SETI is more likely to find signals
deliberately directed at the Earth than accidentally intercepting collimated
communications. Equally, civilisations wishing to establish a network of
communicating species may use weakly collimated beams to build up the network
through interception, if they are willing to pay a cost penalty that is lower
than that meted by fully isotropic beacons. Future SETI searches should
consider the possibility that communicating civilisations will attempt to
strike a balance between optimising costs and encouraging contact between
civilisations, and look for weakly collimated pulses as well as narrow-beam
pulses directed deliberately at the Earth.Comment: 12 pages, 7 figures, accepted for publication in JBI
Influence of diesel fuel on seed germination
The use of plant-based systems to remediate contaminated soils has become an area of intense scientific study in recent years and it is apparent that plants which grow well in contaminated soils need to be identified and screened for use in phytoremediation technologies. This study investigated the effect of diesel fuel on germination of selected plant species. Germination response varied greatly with plant species and was species specific, as members of the same plant family showed differential sensitivity to diesel fuel contamination. Differences were also seen within plant subspecies. At relatively low levels of diesel fuel contamination, delayed seed emergence and reduced percentage germination was observed for the majority of plant species investigated. Results suggest the volatile fraction of diesel fuel played an influential role in delaying seed emergence and reducing percentage germination. In addition, the remaining diesel fuel in the soil Lidded to this inhibitory effect on germination by physically impeding water and oxygen transfer between the seed and the surrounding soil environment, thus hindering the germination response
A summary of results from solar monitoring rocket flights
Three rocket flights to measure the solar constant and provide calibration data for sensors aboard Nimbus 6, 7, and Solar Maximum Mission (SMM) spacecraft were accomplished. The values obtained by the rocket instruments for the solar constant in SI units are: 1367 w/sq m on 29 June 1976; 1372 w/sq m on 16 November 1978; and 1374 w/sq m on 22 May 1980. The uncertainty of the rocket measurements is + or - 0.5%. The values obtained by the Hickey-Frieden sensor on Nimbus 7 during the second and third flights was 1376 w/sq m. The value obtained by the Active Cavity Radiometer Model IV (ACR IV) on SMM during the flight was 1368 w/sq m
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