منابع مشابه
Ab-initio step- and kink-formation energies on Pb(lll)
Ab-initio formation energies for (100)and (111)-microfacet steps on Pb(lll) are in satisfactory agreement with measured values, given that these values are known only as well as the Pb(lII) surface energy; the calculated step-energy ratio, 1.29, is within -8?Zoof experiment. In contrast, calculated kink-formation energies, 41 and 60 meV for the two step types, are 40-50% below published experim...
متن کاملEffect of Step Length and Step Period on Walking Speed and Energy Consumption: a Parameter Study
Stability and performance are two main issues in motion of bipeds. To ensure stability of motion, a biped needs to follow specific pattern to comply with a stability criterion such as zero moment point. However, there are infinity many patterns of motion which ensure stability, so one might think of achieving better performance by choosing proper parameters of motion. Step length and step perio...
متن کاملAbsolute step and kink formation energies of Pb derived from step roughening of two-dimensional islands and facets
The shapes of ~111! oriented two-dimensional ~2D! islands and facets, the latter being part of threedimensional ~3D! crystallites of Pb, were equilibrated at 104–520 K. Island sizes were in the range of 15–90 nm radius, facets typically at 100–270 nm radius. They were imaged by scanning tunneling microscopy to provide the exact outline of the bounding step. Increased step roughening with increa...
متن کاملeffect of step length and step period on walking speed and energy consumption: a parameter study
stability and performance are two main issues in motion of bipeds. to ensure stability of motion, a biped needs to follow specific pattern to comply with a stability criterion such as zero moment point. however, there are infinity many patterns of motion which ensure stability, so one might think of achieving better performance by choosing proper parameters of motion. step length and step perio...
متن کاملEffective Stiffness: Generalizing Effective Resistance Sampling to Finite Element Matrices
We define the notion of effective stiffness and show that it can used to build sparsifiers, algorithms that sparsify linear systems arising from finite-element discretizations of PDEs. In particular, we show that sampling O(n log n) elements according to probabilities derived from effective stiffnesses yields an high quality preconditioner that can be used to solve the linear system in a small ...
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ژورنال
عنوان ژورنال: Hyomen Kagaku
سال: 1999
ISSN: 0388-5321,1881-4743
DOI: 10.1380/jsssj.20.837