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This bibliography contains more than 500 published and unpublished references relevant to the emperor goose (Chen canagica).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