Chapter 4. A Nested System in Transition in Portland

2017 ◽  
pp. 99-146
Keyword(s):  
Nested System

scholarly journals Performance of RegCM2.5/NCAR-CSM Nested System for the Simulation of Climate Change in East Asia Caused by Global Warming.

2001 ◽  
Vol 79 (1) ◽  
pp. 99-121 ◽  
Author(s):  
Hisashi Kato ◽  
Keiichi Nishizawa ◽  
Hiromaru Hirakuchi ◽  
Shinji Kadokura ◽  
Naoko Oshima ◽  
...  
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
East Asia ◽  
Nested System

A necessary condition for omnigenity in stellarators

1994 ◽  
Vol 51 (2) ◽  
pp. 261-269
Author(s):  
Walter Dommaschk
Keyword(s):  
Lower Bound ◽  
Field Strength ◽  
Magnetic Surface ◽  
Necessary Condition ◽  
Sufficient Condition ◽  
Magnetic Surfaces ◽  
Field Lines ◽  
Rotational Transform ◽  
Local Gradient ◽  
Nested System

A lower bound for the total variation Bmax/Bminof the field strength B on a toroidal vacuum magnetic surface with finite twist (rotational transform) of the field is given as a necessary (not sufficient) condition for the field lines to be geodesics on it. If such a surface existed, it would be omnigenous with respect to the local gradient-B and centrifugal guiding-centre drift approximation, which means that the normal components of these drift velocities would be zero. It is found that the lower bound on Bmax/Bmindepends on the maximum of – (r/B) ∂B/∂r within the surface. Hereris the distance from the origin of the torus. The lower bound is large if this maximum is small, and vice versa. For some more recent stellarator configurations the condition is found to be satisfied at outer magnetic surfaces. It is obtained without the use of expansion techniques, under the assumption that there is a nested system of magnetic surfaces within the omnigenous one.

Resolving water conflicts in the American West

Water Policy ◽  
2015 ◽  
Vol 17 (4) ◽  
pp. 679-706 ◽  
Author(s):  
Matthew McKinney ◽  
John E. Thorson
Keyword(s):  
Water Resources ◽  
American West ◽  
Local State ◽  
Water Conflicts ◽  
Community Based ◽  
The World ◽  
Nested System

The American West is defined first and foremost by aridity, scarcity, and variability of water resources. In response to this geographic imperative, the region has evolved a robust menu of legal, institutional, and community-based approaches to managing water and conflicts at local, state, and national levels. While far from perfect, this framework may offer lessons to other regions throughout the world that are increasingly faced with water conflicts due to scarcity and variability of water resources. The resulting menu of approaches reflects an adaptive, collaborative, and nested system of governing water resources.

scholarly journals Whither DSM–V?

2009 ◽  
Vol 195 (5) ◽  
pp. 391-392 ◽  
Author(s):  
Allen Frances
Keyword(s):  
Biological Markers ◽  
Psychiatric Diagnosis ◽  
False Positive ◽  
Paradigm Shift ◽  
Development Process ◽  
Dsm V ◽  
Nested System

SummaryThe DSM–V development process started with a grand ambition to provide a ‘paradigm shift’ in psychiatric diagnosis, based initially on the identification of biological markers. This is clearly unattainable, and so energy has now been diverted into developing other major changes, including the development of dimensional ratings and the formal diagnosis of prodromal and subthreshold disorders. It is argued that this process could lead to false positive ‘epidemics’ with harmful excessive treatments. The better, more modest, alternative is to reassess the text descriptions of the disorders and join with ICD–11 in creating a single nested system for both DSM–V and ICD–11.

A Nonlinear Van Der Waals Force Model for Multiwalled Carbon Nanotubes Modeled by a Nested System of Cylindrical Shells

2010 ◽  
Vol 77 (6) ◽  
Author(s):  
X. Q. He ◽  
S. Kitipornchai ◽  
C. M. Wang ◽  
Y. Xiang ◽  
Q. Zhou
Keyword(s):  
Nonlinear Term ◽  
Van Der Waals ◽  
Force Model ◽  
Multiwalled Carbon ◽  
Buckling Loads ◽  
Post Buckling ◽  
Vdw Force ◽  
Critical Buckling Strain ◽  
Nested System ◽  
Vdw Interaction

In this paper, a more refined pressure distribution expression is derived to describe the van der Waals (vdW) interaction between any two tubes of a multiwalled carbon nanotube (MWCNT). Based on this new vdW force expression, a continuum cylindrical shell model is established for the buckling and post-buckling analysis of MWCNTs. The buckling and post-buckling responses are simulated for MWCNTs with various sizes to examine the consequences of ignoring the nonlinear term in the Taylor expansion of vdW force function. By comparing the results furnished by the commonly used linear vdW force model and the present nonlinear vdW force model, it is found that the buckling responses before the critical buckling strain are almost the same. Thus, the simple linear vdW force model suffices for the calculation of buckling loads. However, the post-buckling responses simulated from present nonlinear vdW force model are significantly lower than those given by the linear vdW force model. This indicates that the present nonlinear vdW force model must be used when considering the post-buckling responses.

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