9,718 research outputs found
Structural Analysis and Matrix Interpetive System /SAMIS/ program Technical report, Feb. - Aug. 1966
Development of characteristic equations and error analysis for computer programs contained in structural analysis and matrix interpretive syste
Stationary and moving breathers in a simplified model of curved alpha--helix proteins
The existence, stability and movability of breathers in a model for
alpha-helix proteins is studied. This model basically consists a chain of
dipole moments parallel to it. The existence of localized linear modes brings
about that the system has a characteristic frequency, which depends on the
curvature of the chain. Hard breathers are stable, while soft ones experiment
subharmonic instabilities that preserve, however the localization. Moving
breathers can travel across the bending point for small curvature and are
reflected when it is increased. No trapping of breathers takes place.Comment: 19 pages, 11 figure
Preliminary evaluation of radar imagery of Yellowstone Park, Wyoming
Evaluation of radar imagery of Yellowstone Park, Wyomin
Wyoming Sage-Grouse Working Groups: Lessons Learned
The greater sage-grouse (Centrocercus urophasianus) has been the subject of multiple status reviews under the Endangered Species Act (ESA). Wyoming accounts for approximately 38% of the range-wide population. Since 2000, 2 statewide and 8 local citizen working groups have been established in Wyoming to developed conservation plans and advise state policy. The first statewide plan for the conservation of sage-grouse was formally adopted in 2003. The statewide plan established local sage-grouse working groups charged with developing and facilitating implementation of local conservation plans. Those 8 plans were completed in 2007 and 2008, and updated in 2014. From 2005-2017, the local working groups allocated nearly $7 million in legislatively appropriated funds to support conservation projects. In 2007, then Wyoming governor Dave Freudenthal appointed a statewide Sage-grouse Implementation Team. The team was statutorily sanctioned by the Wyoming legislature in 2015 and advises the current governor on all matters related to the Wyoming Greater Sage-Grouse Core Area Protection Policy. The Core Area Policy was established by Executive Order and provides mechanisms for limiting human disturbance in the most important sage-grouse habitats. Federal land management agencies have incorporated most aspects of the Core Area Policy into their land use planning decisions. Effectiveness of local and state-wide collaborative conservation has been evaluated through assessments of local working group accomplishments, research on policy effectiveness, sage-grouse population monitoring, and ESA status reviews
Gluon distributions in nucleons and pions at a low resolution scale
In this paper we study the gluon distribution functions in nucleons and pions
at a low resolution scale. This is an important issue since parton
densities at low have always been taken as an external input which is
adjusted through DGLAP evolution to fit the experimental data at higher scales.
Here, in the framework of a model recently developed, it is shown that the
hypothetical cloud of {\it neutral} pions surrounding nucleons and pions
appears to be responsible for the characteristic valence-like gluon
distributions needed at the inital low scale. As an additional result, we get
the remarkable prediction that neutral and charged pions have different
intrinsic sea flavor contents.Comment: final version to appear in Phys. Rev. D. Discussion on several points
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