28,939 research outputs found
Lyapunov Stability Analysis for Invariant States of Quantum Systems
In this article, we propose a Lyapunov stability approach to analyze the
convergence of the density operator of a quantum system. In contrast to many
previously studied convergence analysis methods for invariant density operators
which use weak convergence, in this article we analyze the convergence of
density operators by considering the set of density operators as a subset of
Banach space. We show that the set of invariant density operators is both
closed and convex, which implies the impossibility of having multiple isolated
invariant density operators. We then show how to analyze the stability of this
set via a candidate Lyapunov operator.Comment: A version of this paper has been accepted at 56th IEEE Conference on
Decision and Control 201
The Emperor Goose: An Annotated Bibliography
This bibliography contains more than 500 published and unpublished references
relevant to the emperor goose (Chen canagica). The referenced works date from the early exploration of Beringia and Alaska through the formal description of the species in 1802 to 1993
Lateral-directional control of the x-15 airplane
Lateral directional control and stability characteristics of X-15 aircraf
Processing ERTS and Aircraft MSS data with the General Electric Image 100 system
There are no author-identified significant results in this report
A Study of Ovarian Abnormalities in Fowls
The present study involves three pheasants and six domestic hens which for one reason or another presented abnormalities of appearance or behavior. A normal pheasant hen selected in the fall of 19047 is included for comparison
Self-Referent Pronouns, Self-Focus, and Depressive Symptoms in Adolescence
Youth with elevated depressive symptoms tend to engage in self-focusing behaviors, such as rumination and conversational self-focus. Past adult research also suggests that these self-focusing behaviors relate to depressive symptoms and may further be related to behavioral, implicit self-referent word use. Specifically, adults with higher depressive symptoms typically use more self-referent pronouns (e.g., ‘I,’ ‘me,’ ‘my’). The current adolescent study (N = 186, M = 15.68 years) utilized Linguistic Inquiry and Word Count (LIWC; Pennebaker et al., 2015) software to test whether depressive symptoms, rumination, and conversational self-focus related to self-referent pronoun use during an observational task. Results indicated that higher levels of depressive symptoms and rumination were linked with more self-referent pronoun use, but these associations were only marginally significant. In contrast to expectations, self- and friend- reported conversational self-focus was not associated with increased self- referent pronoun use. Implications and future directions for research are discussed
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