17,374 research outputs found
Technical Requirements Analysis and Control Systems (TRACS) Initial Operating Capability (IOC) documentation
The Technical Requirements Analysis and Control Systems (TRACS) software package is described. TRACS offers supplemental tools for the analysis, control, and interchange of project requirements. This package provides the fundamental capability to analyze and control requirements, serves a focal point for project requirements, and integrates a system that supports efficient and consistent operations. TRACS uses relational data base technology (ORACLE) in a stand alone or in a distributed environment that can be used to coordinate the activities required to support a project through its entire life cycle. TRACS uses a set of keyword and mouse driven screens (HyperCard) which imposes adherence through a controlled user interface. The user interface provides an interactive capability to interrogate the data base and to display or print project requirement information. TRACS has a limited report capability, but can be extended with PostScript conventions
Media, War and Postmodernity
Media, War and Postmodernity investigates how conflict and international intervention have changed since the end of the Cold War, asking why Western military operations are now conducted as high-tech media spectacles, apparently more important for their propaganda value than for any strategic aims.
Discussing the humanitarian interventions of the 1990s and the War on Terror, the book analyzes the rise of a postmodern sensibility in domestic and international politics, and explores how the projection of power abroad is undermined by a lack of cohesion and purpose at home. Drawing together debates from a variety of disciplinary and theoretical perspectives, Philip Hammond argues that contemporary warfare may be understood as 'postmodern' in that it is driven by the collapse of grand narratives in Western societies and constitutes an attempt to recapture a sense of purpose and meaning
A Common Origin for Ridge-and-Trough Terrain on Icy Satellites by Sluggish Lid Convection
Ridge-and-trough terrain is a common landform on outer Solar System icy
satellites. Examples include Ganymede's grooved terrain, Europa's gray bands,
Miranda's coronae, and several terrains on Enceladus. The conditions associated
with the formation of each of these terrains are similar: heat flows of order
tens to a hundred milliwatts per meter squared, and deformation rates of order
to s. Our prior work shows that the conditions
associated with the formation of these terrains on Ganymede and the south pole
of Enceladus are consistent with vigorous solid-state ice convection in a shell
with a weak surface. We show that sluggish lid convection, an intermediate
regime between the isoviscous and stagnant lid regimes, can create the heat
flow and deformation rates appropriate for ridge and trough formation on a
number of satellites, regardless of the ice shell thickness. For convection to
deform their surfaces, the ice shells must have yield stresses similar in
magnitude to the daily tidal stresses. Tidal and convective stresses deform the
surface, and the spatial pattern of tidal cracking controls the locations of
ridge-and-trough terrain.Comment: 45 pages, 7 figures; accepted for publication in Physics of the Earth
and Planetary Interior
Tensor-Scalar Torsion
A theory of gravity with torsion is examined in which the torsion tensor is
constructed from the exterior derivative of an antisymmetric rank two potential
plus the dual of the gradient of a scalar field. Field equations for the theory
are derived by demanding that the action be stationary under variations with
respect to the metric, the antisymmetric potential, and the scalar field. A
material action is introduced and the equations of motion are derived. The
correct conservation law for rotational angular momentum plus spin is observed
to hold in this theory.Comment: 10 pages, LaTeX, Mod. Phys. Lett. A accepte
Antisymmetric tensor contribution to the muon g-2
We investigate the Kalb-Ramond antisymmetric tensor field as solution to the
muon problem. In particular we calculate the lowest-order Kalb-Ramond
contribution to the muon anomalous magnetic moment and find that we can fit the
new experimental value for the anomaly by adjusting the coupling without
affecting the electron anomalous magnetic moment results.Comment: 7 pages, 1 figur
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Precision placement of fertiliser for optimising the early nutrition of vegetable crops : a review of the implications for the yield and quality of crops, and their nutrient use efficiency
The research outlined in this paper highlights the importance of the early nutrition of vegetable crops, and its long-term effects on their subsequent growth and development. Results are also presented to demonstrate how the nutrient supply during the establishment stages of young seedlings and transplants can be enhanced by targeting fertiliser to a zone close to their developing roots. Three different precision fertiliser placement techniques are compared for this purpose: starter, band or side-injected fertiliser. The use of each of these methods consistently produced the same (or greater) yields at lower application rates than those from conventional broadcast applications, increasing the apparent recovery of N, P and K, and the overall efficiency of nutrient use, while reducing the levels of residual nutrients in the soil. Starter fertilisers also advanced the maturity of some crops, and enhanced produce quality by increasing the proportions of the larger and/or more desirable marketable grades. The benefits of the different placement techniques are illustrated with selected examples from research at Warwick HRI using different vegetable crops, including lettuce, onion and carrot
Microgeneration and related energy technologies and practices for low-carbon buildings : Guest Editorial
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