Magnetism and bonding in graphene nanodots with H modified interior, edge, and apex

2011 ◽  
Vol 135 (8) ◽  
pp. 084707 ◽  
Author(s):  
Michael R. Philpott ◽  
Prabhat ◽  
Yoshiyuki Kawazoe
Keyword(s):  
Interior Edge

Effect of Column Dimensions on the Punching Shear of Flat Slab

2019 ◽  
pp. 378-393
Author(s):  
Hamid Abdulmahdi Faris ◽  
Lubna Mohammed Abd
Keyword(s):  
Reinforced Concrete ◽  
Shear Failure ◽  
Concrete Slab ◽  
The Other ◽  
Punching Shear ◽  
Concrete Slabs ◽  
Reinforced Concrete Slab ◽  
Flat Slab ◽  
Interior Edge ◽  
Reinforced Concrete Slabs

The "flat slab" is a reinforced concrete slab bolstered, by a number of columns. Punching, shear is a category for collapse for reinforced concrete slabs exposed to great confined forces. In "flat slab" constructions the shear failure happens, at column bolster joints. To avoid this, collapse two methods are used, first method is increasing the column dimensions and, the other is to use drop panel if the first method leads to uneconomical, design. Two examples are used to find the effect, of column dimensions, increase on the punching shear failure of "flat slab". The first example, is a "flat slab" of span (5 by 5) m and the other is of span (6 by 6) m. The column which examined is the interior, edge and corner columns, and the interior column is the most dangerous case. It is concluded that, the increase of column dimensions are lead to avoid of punching shear failure in "flat slab" and the drop panel is enlarge the area of the critical shear perimeter and this avoiding punching shear failure.

scholarly journals Quasi-steady capillarity-driven flows in slender containers with interior edges

2011 ◽  
Vol 685 ◽  
pp. 271-305 ◽  
Author(s):  
Mark M. Weislogel ◽  
J. Alex Baker ◽  
Ryan M. Jenson
Keyword(s):  
Boundary Condition ◽  
Capillary Flow ◽  
A Priori ◽  
Analytic Solutions ◽  
Interfacial Flows ◽  
Interior Edge ◽  
Dynamical Boundary Condition ◽  
Wetting Properties ◽  
Capillary Fluidics ◽  
The Impact

AbstractIn the absence of significant body forces the passive manipulation of fluid interfacial flows is naturally achieved by control of the specific geometry and wetting properties of the system. Numerous ‘microfluidic’ systems on Earth and ‘macrofluidic’ systems aboard spacecraft routinely exploit such methods and the term ‘capillary fluidics’ is used to describe both length-scale limits. In this work a collection of analytic solutions is offered for passive and weakly forced flows where a bulk capillary liquid is slowly drained or supplied by a faster capillary flow along at least one interior edge of the container. The solutions are enabled by an assumed known pressure (or known height) dynamical boundary condition. Following a series of assumptions this boundary condition can be in part determined a priori from the container dimensions and further quantitative experimental evidence, but not proof, is provided in support of its expanded use herein. In general, a small parameter arises in the scaling of the problems permitting a decoupling of the edge flow from the global bulk meniscus flow. The quasi-steady asymptotic system of equations that results may then be easily solved in closed form for a useful variety of geometries including uniform and tapered sections possessing at least one critically wetted interior edge. Draining, filling, bubble displacement and other imbibing flows are studied. Cursory terrestrial and drop tower experiments agree well with the solutions. The solutions are valued for the facility they provide in computing designs for selected capillary fluidics problems by way of passive transport rates and meniscus displacement. Because geometric permutations of any given design are myriad, such analytic tools are capable of efficiently identifying and comparing critical design criteria (i.e. shape and size) and the impact of various wetting conditions resulting from the fluid properties and surface conditions. Sample optimizations are performed to demonstrate the utility of the method.

The Exterior and Interior Edge States of Magnetic Billiards: Spectral Statistics and Correlations

2001 ◽  
Vol T90 (1) ◽  
pp. 64 ◽  
Author(s):  
Klaus Hornberger ◽  
Klaus Hornberger ◽  
Uzy Smilansky
Keyword(s):  
Edge States ◽  
Interior Edge ◽  
Spectral Statistics ◽  
Magnetic Billiards

scholarly journals Landscape Context and Fragmentation Effects on Forest Birds in Southern Ontario

The Condor ◽  
2001 ◽  
Vol 103 (4) ◽  
pp. 701-714 ◽  
Author(s):  
Madeline J. W. Austen ◽  
Charles M. Francis ◽  
Dawn M. Burke ◽  
Michael S. W. Bradstreet
Keyword(s):  
Patch Size ◽  
Forest Cover ◽  
Forest Birds ◽  
Individual Species ◽  
Forest Patch ◽  
Southern Ontario ◽  
Interior Edge ◽  
Point Counts ◽  
Forest Interior ◽  
Regional Forest

Abstract We examined the effects of patch size, local forest cover, and regional forest cover on the numbers and species composition of forest birds detected during fixed-radius point counts in 287 forest patches in four replicate study areas in southern Ontario. Each study area consisted of two subareas differing in regional forest cover. The number of forest-interior species (as classified from the literature) detected per count, after controlling for forest patch size, tended to be higher in subareas with greater regional forest cover, but this effect was much stronger in some study areas than others. In contrast, numbers of edge species and interior-edge generalists were higher in subareas with lower regional forest cover. Within study areas, the number of forest-interior species increased and edge species decreased with both woodlot size and core area (amount of forest >100 m from an edge), but total species diversity at a point was relatively unaffected. Analyses of individual species generally corroborated the patterns, except that some so-called interior-edge generalists were more likely to be detected in large woodlots, while others were more likely in small woodlots. There was a tendency for the loss of forest-interior species with decreasing woodlot size to be greatest in subareas with low regional forest cover. In the context of highly fragmented landscapes such as southern Ontario, where many forest-dependent species have become rare, forest conservation should focus on protecting or restoring larger forest tracts in areas with substantial remaining regional forest cover. Efectos del Contexto del Paisaje y la Fragmentación sobre Aves de Bosque en el Sur de Ontario Resumen.  Examinamos el efecto del tamaño de parches y de la cobertura de bosque a escalas local y regional sobre el número y composición de especies de aves de bosque. Las aves fueron detectadas mediante puntos de conteo de radio fijo en 287 parches de bosque, en cuatro áreas de estudio replicadas en el sur de Ontario. Cada área de estudio consistió en dos sub-áreas, las que se diferenciaron en la cantidad de cobertura regional de bosque. Luego de controlar por el área de los parches, el número de especies de interior de bosque (clasificadas según la literatura) detectadas por conteo tendió a ser mayor en sub-áreas con mayor cobertura regional de bosque. Sin embargo, este efecto fue mucho mayor en algunas áreas de estudio que en otras. En contraste, los números de especies de borde y especies generalistas de borde-interior fueron mayores en las sub-áreas con menor cobertura regional de bosque. Dentro de cada área de estudio, el número de especies de interior de bosque aumentó y el número de especies de borde disminuyó con el aumento del tamaño y del área nucleo (cantidad de bosque a >100 m del borde) de los fragmentos de bosque, pero la diversidad total de especies en un punto no se vió relativamente afectada. Los análisis individuales por especie corroboraron los patrones observados, exceptuando que alguna especies llamadas generalistas de borde-interior tuvieron una mayor probabilidad de ser detectadas en fragmentos grandes, mientras que otras tuvieron mayor probabilidad en fragmentos pequeños. La tendencia más marcada a perder especies de interior de bosque con la reducción del área de los fragmentos ocurrió en las sub-áreas con baja cobertura regional de bosque. En paisajes en un contexto altamente fragmentado tales como en el sur de Ontario, donde muchas especies dependientes de bosque se han tornado escasas, la conservación de bosques debiera estar enfocada a la protección o restauración de grandes extenciones de bosque en áreas donde la cobertura regional de bosque es aún substancial.

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