9,550 research outputs found
Detailed design specification for the ALT Shuttle Information Extraction Subsystem (SIES)
The approach and landing test (ALT) shuttle information extraction system (SIES) is described in terms of general requirements and system characteristics output products and processing options, output products and data sources, and system data flow. The ALT SIES is a data reduction system designed to satisfy certain data processing requirements for the ALT phase of the space shuttle program. The specific ALT SIES data processing requirements are stated in the data reduction complex approach and landing test data processing requirements. In general, ALT SIES must produce time correlated data products as a result of standardized data reduction or special purpose analytical processes. The main characteristics of ALT SIES are: (1) the system operates in a batch (non-interactive) mode; (2) the processing is table driven; (3) it is data base oriented; (4) it has simple operating procedures; and (5) it requires a minimum of run time information
Model-independent Analyses of Dark-Matter Particle Interactions
A model-independent treatment of dark-matter particle elastic scattering has
been developed, yielding the most general interaction for WIMP-nucleon
low-energy scattering, and the resulting amplitude has been embedded in the
nucleus, taking into account the selection rules imposed by parity and
time-reversal. One finds that, in contrast to the usual
spin-independent/spin-dependent (SI/SD) formulation, the resulting cross
section contains six independent nuclear response functions, three of which are
associated with possible velocity-dependent interactions. We find that current
experiments are four orders of magnitude more sensitive to derivative couplings
than is apparent in the standard SI/SD treatment, which necessarily associates
such interactions with cross sections proportional to the square of the WIMP
velocity relative to the nuclear center of mass.Comment: 10 pages, 2 figures; talk presented at TAUP201
Model-independent WIMP Scattering Responses and Event Rates: A Mathematica Package for Experimental Analysis
The community's reliance on simplified descriptions of WIMP-nucleus
interactions reflects the absence of analysis tools that integrate general
theories of dark matter with standard treatments of nuclear response functions.
To bridge this gap, we have constructed a public-domain Mathematica package for
WIMP analyses based on our effective theory formulation. Script inputs are 1)
the coefficients of the effective theory, through which one can characterize
the low-energy consequences of arbitrary ultraviolet theories of WIMP
interactions; and 2) one-body density matrices for commonly used targets, the
most compact description of the relevant nuclear physics. The generality of the
effective theory expansion guarantees that the script will remain relevant as
new ultraviolet theories are explored; the use of density matrices to factor
the nuclear physics from the particle physics will allow nuclear structure
theorists to update the script as new calculations become available,
independent of specific particle-physics contexts. The Mathematica package
outputs the resulting response functions (and associated form factors) and also
the differential event rate, once a galactic WIMP velocity profile is
specified, and thus in its present form provides a complete framework for
experimental analysis. The Mathematica script requires no a priori knowledge of
the details of the non-relativistic effective field theory or nuclear physics,
though the core concepts are reviewed here and in arXiv:1203.3542.Comment: 30+6 page
Application of the methods of celestial mechanics to the rigid body problem Final report, 1 Jul. 1965 - 1 Jun. 1966
Celestial mechanics perturbation methods applied to problem of describing motion of rigid artificial earth satellite about its center of mas
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