4,250 research outputs found
Dual and complex formulations of thin shell equations
Dual and mixed formulations of thin shell equations using displacements and stress function
A dual formulation of thin shell theory
Differential equations formulated for stress functions, and thin elastic shell
On the derivation of Vlasov's shallow shell equations and their application to non shallow shells
Derivation of Vlasov shallow shell equations and their application to non-shallow shell
Analysis of a spherical shell with a non-axisymmetric boundary
Spherical shell problem formulated in terms of stress functions, and applied to nonaxisymmetric boundar
On the maximal number of real embeddings of minimally rigid graphs in , and
Rigidity theory studies the properties of graphs that can have rigid
embeddings in a euclidean space or on a sphere and which in
addition satisfy certain edge length constraints. One of the major open
problems in this field is to determine lower and upper bounds on the number of
realizations with respect to a given number of vertices. This problem is
closely related to the classification of rigid graphs according to their
maximal number of real embeddings.
In this paper, we are interested in finding edge lengths that can maximize
the number of real embeddings of minimally rigid graphs in the plane, space,
and on the sphere. We use algebraic formulations to provide upper bounds. To
find values of the parameters that lead to graphs with a large number of real
realizations, possibly attaining the (algebraic) upper bounds, we use some
standard heuristics and we also develop a new method inspired by coupler
curves. We apply this new method to obtain embeddings in . One of
its main novelties is that it allows us to sample efficiently from a larger
number of parameters by selecting only a subset of them at each iteration.
Our results include a full classification of the 7-vertex graphs according to
their maximal numbers of real embeddings in the cases of the embeddings in
and , while in the case of we achieve this
classification for all 6-vertex graphs. Additionally, by increasing the number
of embeddings of selected graphs, we improve the previously known asymptotic
lower bound on the maximum number of realizations. The methods and the results
concerning the spatial embeddings are part of the proceedings of ISSAC 2018
(Bartzos et al, 2018)
The Effect Of Corporate Ethical Values On Accountantsâ Perceptions Of Social Responsibility
Significant research has concluded that corporations have a social responsibility to stakeholders beyond maximizing shareholdersâ wealth. The current study examines the relationship between corporate ethical values and the perception of the importance of corporate social responsibility. A total of 583 CPAs in public accounting, industry and academia completed a survey designed to measure the importance of corporate social responsibility on profitability, long-term success and short-term success before Enron and Worldcom declared bankruptcy. The results indicated that CPAs employed in organizations with high (low) ethical values perceived corporate social responsibility to be more (less) important in profitability and long-term success and less (more) important in short-term success of the firm
Procrastination And Its Relationship With Business Studentsâ Cheating Perceptions
The epidemic of college cheating is evolving to include more sophisticated schemes that are more difficult to detect. Business studentsâ cheating is even more concerning because such behavior in college predicts workplace cheating (Nonis & Swift, 2001). The current study examines procrastination as a personality variable that affects business studentsâ perceptions of cheating ethics. A survey of 370 undergraduate and graduate business students was conducted. The results showed that low procrastinators were more likely to view cheating actions as more unethical compared to high procrastinators. Low procrastinators also had higher academic performance
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