329 research outputs found

    Framing fusion and fission

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    Engineering inter-triplet exchange coupling allows spin mixing between singlet and quintet manifolds in triplet–triplet pair states in metal–organic frameworks, demonstrating increased room-temperature triplet-fusion rates under relatively small applied magnetic fields

    A meta approach to texts in Religious Education: Researching teachers’ engagement with sacred text scholarship in English secondary schools

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    This article reports findings from a sacred text scholarship project in Religious Education / Religion and Worldviews (RE/RW) lessons. In the Texts and Teachers project secondary school teachers found that RE became more meta through a more scholarly treatment of texts, and led to leap moments with pupils who could accomplish multidimensional engagement with texts. This article contributes to an improved understanding of how classroom textual hermeneutics addresses concerns with teaching sacred texts

    Antimatter, Lorentz Symmetry, and Gravity

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    A brief introduction to the Standard-Model Extension (SME) approach to testing CPT and Lorentz symmetry is provided. Recent proposals for tests with antimatter are summarized, including gravitational and spectroscopic tests.Comment: Presented at the 12th International Conference on Low Energy Antiproton Physics, Kanazawa Japan, March 6-11, 2016, Accepted for publication in JPS Conference Proceeding

    Intrapersonal and Interpersonal Factors Predicting Distress and End-of-Life Planning among Individuals with Advanced Cancers

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    The social-cognitive processing model of adaption to cancer posits that both intrapersonal and interpersonal factors influence psychological adjustment (Lepore, 2001). In this dissertation, two intrapersonal factors, intolerance of uncertainty (IU) and experiential avoidance (EA), were examined in relation to emotional distress (psychological outcome) and advanced care planning (behavioral outcome) among patients living with advanced cancer. EA (efforts intended to avoid negative emotions, thoughts, images or memories) was hypothesized to mediate the relationship between IU (the ability to tolerate uncertainty or the unknown) and emotional distress. In line with the social-cognitive model, two interpersonal factors, social support from family and friends and patient trust in physician, were proposed to buffer the indirect influence of IU on distress through EA. IU and EA were hypothesized to interact to predict advanced care planning (ACP), such that those higher on IU and EA would engage in less ACP compared to those higher on IU but lower on EA. The sample included 108 adults with Stage III or IV cancer (53% female; Mage = 63 years). All constructs were measured by standardized self-report scales with acceptable to strong internal consistency reliability (i.e., Intolerance of Uncertainty Scale-Short Form; The Brief Experiential Avoidance Questionnaire; The Duke-UNC Functional Social Support Questionnaire; Trust in Physician Scale; Hospital Anxiety and Depression Scale; Advanced Care Planning Checklist). The PROCESS macro for SPSS was used to conduct mediation, moderation, and conditional process analyses. IU evidenced both direct and indirect relationships with anxiety and depressive symptoms. However, the indirect influence of IU through EA was not contingent on social support. Patient trust in physician did moderate the indirect relationship between IU and anxiety (but not depressive symptoms), albeit in an unanticipated direction. Specifically, the indirect relationship between IU and anxiety symptoms (through EA) was significant for those with moderate to high physician trust but not low trust. Moreover, moderation analyses showed that EA did not influence the positive direct association between IU and ACP. Post-hoc multiple regression analysis, including age, emotional distress, interpersonal factors (social support and trust in physician) and intrapersonal factors (IU and EA), demonstrated that only age and EA remained significant predictors of ACP. Accounting for other factors, older participants engaged in more ACP and those who were more experientially avoidant engaged in less ACP. Although this dissertation used a social-cognitive processing model in which intrapersonal and interpersonal factors interact to predict adjustment, the overall findings provide stronger support for the salience of intrapersonal factors in influencing emotional distress and ACP. IU and, in particular, EA are identified as targets for intervention aimed at helping individuals with advanced cancer manage the emotional impact of illness and make end-of-life decisions

    Magnon-photon coupling in the noncollinear magnetic insulator Cu 2 OSeO 3

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    Anticrossing behavior between magnons in the noncollinear chiral magnet Cu2OSeO3 and a two-mode X-band microwave resonator was studied in the temperature range 5–100 K. In the field-induced ferrimagnetic phase, we observed a strong-coupling regime between magnons and two microwave cavity modes with a cooperativity reaching 3600. In the conical phase, cavity modes are dispersively coupled to a fundamental helimagnon mode, and we demonstrate that the magnetic phase diagram of Cu2OSeO3 can be reconstructed from the measurements of the cavity resonance frequency. In the helical phase, a hybridized state of a higher-order helimagnon mode and a cavity mode—a helimagnon polariton—was found. Our results reveal a class of magnetic systems where strong coupling of microwave photons to nontrivial spin textures can be observed

    a [Ni(Salen)]‐TEMPO redox‐conducting polymer for organic batteries

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    Redox-active nitroxyl-containing polymers are promising candidates as possible replacements for inorganic based energy-storage materials, due to their high energy density and fast redox kinetics. One challenge towards the implementation of such a system is the insufficient electrical conductivity, impeding the charge collection even with highly conductive additives. Herein, the first implementation of a polymeric bis(salicylideniminato) nickel (NiSalen) conductive backbone as an active charge-collecting wire is reported. NiSalen simultaneously serves as a charge collector for nitroxyl pendants and supports the redox capacity of the material. This novel polymer exhibits a specific capacity of up to 91.5 mAh g−1, retaining 87 % of its theoretical capacity at 800 C and more than 30 % at as high as 3000 C (66 % capacity retention after 2000 cycles). The properties of the new material upon operation was studied by means of operando electrochemical methods, UV-Vis, and electron paramagnetic resonance spectroscopy

    Religious education and hermeneutics: the case of teaching about Islam

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    This article attempts to do three things: the first is an exploration of the ways in which Islam is presented in an essentialist way (with a focus on Religious Education (RE) in England and Wales), leading to stereotypes and unsubstantiated generalisations. Secondly, it provides a critique of essentialism, and finally a case is made for the role of hermeneutics in the teaching and learning of Islam

    Spins at work: probing charging and discharging of organic radical batteries by electron paramagnetic resonance spectroscopy

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    Organic radical batteries (ORBs) are a promising class of electrochemical power sources employing organic radicals as redox-active groups. This article reports on the development of a versatile on-substrate electrode setup for spectroelectrochemical Electron Paramagnetic Resonance (EPR) measurements on redox conductive polymers for ORBs. Quantitative in operando EPR experiments performed on electrochemical cells with a di-TEMPO Ni-Salen polymer as active electrode material demonstrate a strong decrease in the number of paramagnetic centers upon oxidizing the film. The distinct EPR signatures of the TEMPO-containing polymer and its fragments in different molecular environments are used to study its degradation upon repeated cycling. A comparison between the number of EPR-active sites and the number of electrochemically active charges, as measured by cyclic voltammetry, provides information on the nature of the degradation process. Low-temperature ex situ pulse EPR measurements on the oxidized polymer film reveal the spectrum of dilute nitroxide species, which may be associated with electrochemically inactive islands. These experiments pave the way for advanced EPR techniques for accurately determining distances between adjacent paramagnetic centers and thus for identifying performance-limiting loss mechanisms, which can eventually help develop strategies for making ORBs powerful contenders on the path towards sustainable electrochemical power sources
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