97 research outputs found

    Growing Our Own: A Proposal for the Development of a Nurse Mentoring Program

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    The process of mentoring is not a new concept in the world of business or in the world of health care. Mentoring has been implemented in many organizations and disciplines throughout the world and has been shown to yield many benefits including employee satisfaction, personal and professional growth, and organizational loyalty. This paper proposes a process to develop a nurse mentoring program for the Department of Nursing at Mayo Clinic. Highlights of the benefits that can be realized with the implementation of a nurse mentoring program, supporting literature and research, and challenges and barriers encountered when developing this proposal will be reviewed. In addition, Jean Watson\u27s Theory of Human Caring will be endorsed as the foundation for the nurse mentoring program for the Department of Nursing at Mayo Clinic in Rochester, Minnesota. This paper will explain why a nurse mentoring program based on Watson\u27s concepts of caring can be a valuable tool that will provide gains to the participants in the program, the Department of Nursing, the organization, and the patients

    Get exercise, information during Walk-With-A-Doc

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    Medical and dietetic students often co-author a column for the Daily Reflector under Dr. Kolasa's byline. The students research the topic a reader or patient has asked. Dr. Kolasa reviews their draft for technical accuracy, patient friendly language, people first language. She fact checks the study or other evidence-based reference the student provides. If a physician review is appropriate, Dr. Kolasa requests a colleague from ECU physicians to review the article. The final draft is submitted to the Reflector with the editor having the final say. The headline is written by the Reflector headline writer. The food and nutrition column has run weekly since 1987. Starting in 2020, in addition to the Daily Reflector, the article is published in daily and weekly papers owned by the Adams Publishing Group East (https://adamspg.com)This is a weekly Q and A newspaper column under the byline of Dr. Kathy Kolasa. Today's column highlights the importance of preventive health measures through 1-hour physical activity with local physicians.Non

    Temperature Driven Structural Phase Transition in Tetragonal-Like BiFeO3

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    Highly-strained BiFeO3 exhibits a "tetragonal-like, monoclinic" crystal structure found only in epitaxial films (with an out-of-plane lattice parameter exceeding the in-plane value by >20%). Previous work has shown that this phase is properly described as a MC_{C} monoclinic structure at room temperature [with a (010)pc_{pc} symmetry plane, which contains the ferroelectric polarization]. Here we show detailed temperature-dependent x-ray diffraction data that evidence a structural phase transition at ~100C to a high-temperature MA_{A} phase ["tetragonal-like" but with a (1-10)pc_{pc} symmetry plane]. These results indicate that the ferroelectric properties and domain structures of strained BiFeO3_3 will be strongly temperature dependent.Comment: 10 pages, 3 figure

    Benzophénanthridines isolées de Zanthoxylum psammophilum

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    Dix-huit composés dont deux nouvelles benzophénanthridines la 8-méthoxy-7,8-dihydrofagaridine 1 et la 8-acétonyl-7,8-dihydrofagaridine 2 ont été isolés des racines de Zanthoxylum psammophilum (Rutaceae). La structure de ces composés (1-18) a été déterminée principalement par l’utilisation de la spectroscopie de RMN 1D (1H et 13C) et 2D (COSY, NOESY, HSQC, HMBC). Le composé 1 a montré une activité antimicrobienne sur S. Aureus.Mots clés: Rutaceae, alcaloïdes, 8-méthoxy-7,8-dihydrofagaridine, 8- acétonyl-7,8-dihydrofagaridin

    Stabilization of weak ferromagnetism by strong magnetic response to epitaxial strain in multiferroic BiFeO3

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    Multiferroic BiFeO3 exhibits excellent magnetoelectric coupling critical for magnetic information processing with minimal power consumption. However, the degenerate nature of the easy spin axis in the (111) plane presents roadblocks for real world applications. Here, we explore the stabilization and switchability of the weak ferromagnetic moments under applied epitaxial strain using a combination of first-principles calculations and group-theoretic analyses. We demonstrate that the antiferromagnetic moment vector can be stabilized along unique crystallographic directions ([110] and [-110]) under compressive and tensile strains. A direct coupling between the anisotropic antiferrodistortive rotations and the Dzyaloshinskii-Moria interactions drives the stabilization of the weak ferromagnetism. Furthermore, energetically competing C- and G-type magnetic orderings are observed at high compressive strains, suggesting that it may be possible to switch the weak ferromagnetism "on" and "off" under the application of strain. These findings emphasize the importance of strain and antiferrodistortive rotations as routes to enhancing induced weak ferromagnetism in multiferroic oxides.ope

    Concurrent transition of ferroelectric and magnetic ordering near room temperature

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    Strong spin-lattice coupling in condensed matter gives rise to intriguing physical phenomena such as colossal magnetoresistance and giant magnetoelectric effects. The phenomenological hallmark of such a strong spin-lattice coupling is the manifestation of a large anomaly in the crystal structure at the magnetic transition temperature. Here we report that the magnetic Néel temperature of the multiferroic compound BiFeO3 is suppressed to around room temperature by heteroepitaxial misfit strain. Remarkably, the ferroelectric state undergoes a first-order transition to another ferroelectric state simultaneously with the magnetic transition temperature. Our findings provide a unique example of a concurrent magnetic and ferroelectric transition at the same temperature among proper ferroelectrics, taking a step toward room temperature magnetoelectric applications. © 2011 Macmillan Publishers Limited. All rights reserved.open435

    Electrically enhanced magnetization in highly strained BiFeO3 films

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    The control of magnetism via an electric field has attracted substantial attention because of potential applications in magnetoelectronics, spintronics and high-frequency devices. In this study, we demonstrate a new approach to enhance and control the magnetization of multiferroic thin film by an electric stimulus. First, to reduce the strength of the antiferromagnetic superexchange interaction in BiFeO3, we applied strain engineering to stabilize a highly strained phase. Second, the direction of the ferroelectric polarization was controlled by an electric field to enhance the Dzyaloshinskii–Moriya interaction in the highly strained BiFeO3 phase. Because of the magnetoelectric coupling in BiFeO3, a strong correlation between the modulated ferroelectricity and enhanced magnetization was observed. The tunability of this strong correlation by an electric field provides an intriguing route to control ferromagnetism in a single-phase multiferroic

    Dual strain mechanisms in a lead-free morphotropic phase boundary ferroelectric

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    Electromechanical properties such as d33 and strain are significantly enhanced at morphotropic phase boundaries (MPBs) between two or more different crystal structures. Many actuators, sensors and MEMS devices are therefore systems with MPBs, usually between polar phases in lead (Pb)-based ferroelectric ceramics. In the search for Pb-free alternatives, systems with MPBs between polar and non-polar phases have recently been theorized as having great promise. While such an MPB was identified in rare-earth (RE) modified bismuth ferrite (BFO) thin films, synthesis challenges have prevented its realization in ceramics. Overcoming these, we demonstrate a comparable electromechanical response to Pb-based materials at the polar-to-non-polar MPB in Sm modified BFO. This arises from ‘dual’ strain mechanisms: ferroelectric/ferroelastic switching and a previously unreported electric-field induced transition of an anti-polar intermediate phase. We show that intermediate phases play an important role in the macroscopic strain response, and may have potential to enhance electromechanical properties at polar-to-non-polar MPBs
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