309 research outputs found
Online Shopping Behavior in Cross-cultural Context: An Empirical Research in China
As a newly evolved emergence from e-business, social commerce has attracted increasingly attention from both researchers and practitioners. Distinguished from the majority of extant research paradigm, the current empirical study extends social commerce research into cross-cultural context and unveils the underlying mechanism through which two dimensions of social media usage (informational and socializing) impact user’s intention to purchase on social commerce websites, thereby facilitating online shopping behaviors. In addition, the research demonstrates the role of cultural distance as a boundary condition attenuating the positive effects of social media usage in cross-cultural social commerce application. Research implications and limitations for future venues are also discussed
Positive Semi-Definiteness of Generalized Anti-Circulant Tensors
Anti-circulant tensors have applications in exponential data fitting. They
are special Hankel tensors. In this paper, we extend the definition of
anti-circulant tensors to generalized anti-circulant tensors by introducing a
circulant index such that the entries of the generating vector of a Hankel
tensor are circulant with module . In the special case when , where
is the dimension of the Hankel tensor, the generalized anticirculant tensor
reduces to the anti-circulant tensor. Hence, generalized anti-circulant tensors
are still special Hankel tensors. For the cases that , and some other cases, including the matrix case that , we give
necessary and sufficient conditions for positive semi-definiteness of even
order generalized anti-circulant tensors, and show that in these cases, they
are SOS tensors. This shows that, in these cases, there are no PNS (positive
semidefinite tensors which are not sum of squares) Hankel tensors
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