31,519 research outputs found
Emma Vogelsburg Mueller and John G. Mueller
No full textPhotograph shows studio bust portrait of Emma Vogelsburg Mueller and John G. Mueller.Photographer's imprint on mount:""H.J. Braunig / Hallettsville / Texas.
On the algebraic characterization of a Mueller matrix in polarization optics - I. Identifying a mueller matrix from its N matrix
No full textWe revisit the problem of identifying a Mueller matrix M through its N matrix N = (M) over tilde GM where G is the familiar Minkowski matrix diag (1, -1, -1, -1) and the tilde denotes matrix transposition. Using the standard methods of reduction of symmetric matrices (tensors) to their canonical forms in Minkowski space, we then show that there exist only two algebraically distinct types of Mueller matrices, which we call types I and II, and obtain the necessary and sufficient conditions for a Mueller matrix in terms of the eigenproperties of the associated N matrix. These conditions identify a Mueller matrix precisely and completely unlike the conditions derived earlier by Givens and Kostinski or by van der Mee. Observing that every Mueller matrix discussed hitherto in the literature is of the type I only, we construct examples of type-II Mueller matrices using the more familiar type-I (in fact pure Mueller) Mueller matrices. Further, we show that every G eigenvalue of an N matrix (see section 2 for a definition) is necessarily non-negative. Using this result, in an accompanying paper, we derive a general three-term factorization of a Mueller matrix which yields the general forms of Mueller and Jones-derived Mueller matrices and completely solves the problem of their algebraic structure
Data from: Vacancy-assisted superfluid drag
No full textPlease cite as: Thomas G. Kiely, Chao Zhang, Erich J. Mueller. (2025) Data From: Vacancy-assisted superfluid drag. [dataset] Cornell University Library eCommons Repository. https://doi.org/10.7298/jarj-a938These files contain the data which was used to generate the graphs in Kiely et al. Vacancy-assisted superfluid drag, PRA 2025. We study superfluid drag in the two-component Bose-Hubbard model with infinitely strong repulsive interactions. In this system, all transport is mediated by the motion of empty sites, or ``holes", and it is hard to move one component without moving the other. We demonstrate, with a combination of analytic and numeric techniques, that the motion of holes leads to strong dissipationless coupling between currents in the two components. This behavior is attributable to polaronic correlations that emerge in the presence of spin currents, which can be observed in experiments. We derive a closed-form expression for the coupling on various lattices in arbitrary spatial dimensions, which we verify through numerical simulations on two dimensional lattices.Thomas G Kiely acknowledges support from the National Science Foundation under grant PHY-2309135 to the Kavli Institute for Theoretical Physics (KITP), and the Gordon and Betty Moore Foundation through Grant GBMF8690 to the University of California, Santa Barbara. Chao Zhang acknowledges support from the National Natural Science Foundation of China (NSFC) under Grant Nos. 12204173, 12275002, and the University Annual Scientific Research Plan of Anhui Province under Grant No 2022AH010013. Erich J Mueller acknowledges support from the National Science Foundation under grant PHY-2409403
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3370: James Mueller
No full textPhotograph of author Jim Mueller, professor in the Mayborn school of Journalism at UNT, posing with his book, "Shooting Arrows and Slinging Mud"
Engagiert für alte Menschen – Hilarion G. Petzold und die Gerontotherapie
No full textDie Arbeit stellt die „gerontotherapeutischen“ Konzepte von Hilarion G. Petzold vor und damit ein Stück Entwicklung moderner Gerontotherapie, die von diesem Pionier der psychotherapeutischen Behandlung alter Menschen als eine integrative „biopsychosoziale“ bzw. sozialökologische Praxis entwickelt wurde. Besonders wird auf seine Entwicklungen der gerontologischen und thanatologischen Weiterbildung für Angehörige helfender, medizinischer und pflegende Berufe in Österreich seit 1977 eingegangen und auf die dabei entstandenen innovativen Modelle. Praxisbeispiel gerontotherapeutischer Arbeit illustrieren die Konzepte.This article is presenting the concepts of “gerontotherapy” as developed by Hilarion G. Petzold, which in the same time depicts some of the developments of modern gerontotherapy, that has been elaborated by this pioneer of psychotherapeutic treatment of the elderly in his integrative “biopsychosocial” approach. Particularly his developments in the training of the helping professions, medical and nursing staff concerning gerontology and thanatology in Austria since 1977 is emphasized leading to innovative models. Practical examples from gerontotherapeutic treatment are illustrating the concepts exposed.https://www.fpi-publikation.de/polyloge/32-2008-mueller-lotti-engagiert-fuer-alte-menschen-hilarion-g/peerReviewedpublishedVersio
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