395 research outputs found

    Tunable Broadband Transparency of Macroscopic Quantum Superconducting Metamaterials

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    Narrow-band invisibility in an otherwise opaque medium has been achieved by electromagnetically induced transparency (EIT) in atomic systems. The quantum EIT behaviour can be classically mimicked by specially engineered metamaterials via carefully controlled interference with a "dark mode". However, the narrow transparency window limits the potential applications that require a tunable wide-band transparent performance. Here, we present a macroscopic quantum superconducting metamaterial with manipulative self-induced broadband transparency due to a qualitatively novel nonlinear mechanism that is different from conventional EIT or its classical analogs. A near complete disappearance of resonant absorption under a range of applied rf flux is observed experimentally and explained theoretically. The transparency comes from the intrinsic bi-stability and can be tuned on/ off easily by altering rf and dc magnetic fields, temperature and history. Hysteretic in situ 100% tunability of transparency paves the way for auto-cloaking metamaterials, intensity dependent filters, and fast-tunable power limiters

    Technology: A Tool for Knowledge Construction in a Reggio Emilia Inspired Teacher Education Program

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    This article describes the application of technology in Reggio Emilia inspired early childhood and teacher education programs at the University of Michigan-Dearborn. We have found that technology used in a Reggio inspired program can be a valuable tool for the representation and organization of ideas, collaboration among a specific learning community, visualization and reflection on thinking, and communication of learning to the broader community. Our experiences and reflections suggest that the integration of technology in a Reggio inspired curriculum supports knowledge construction of both children and student teachers.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/42650/1/10643_2004_Article_477971.pd

    Perceptions of Licensure: A Survey of Michigan Genetic Counselors

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    This study by the Michigan Genetic Counselor Licensure Committee is the first known published documentation of genetic counselors’ beliefs and attitudes about licensure. The response rate from genetic counselors in Michigan was 66% (41/62). Ninety‐five percent of respondents were supportive of licensure. Respondents believed licensure would legitimize genetic counseling as a distinct allied healthcare profession (97.5%), increase the public’s protection (75%), and allow genetic counselors to practice independently (67%). While 45% felt licensure would increase counselor involvement in lawsuits, this did not impact licensure support (p = 0.744). Opinions were split regarding physician supervision and ordering tests. Even though 28% favored physician supervision, there was overwhelming support for genetic counselors performing some components of genetic testing (95%) and ordering some types of genetic tests (82%) independent of a physician. Use of this survey may be helpful in other states to assess genetic counselors’ interest in licensure and for drafting legislation.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/147114/1/jgc40357.pd

    2015 ACVIM Small Animal Consensus Statement on Seizure Management in Dogs

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    This report represents a scientific and working clinical consensus statement on seizure management in dogs based on current literature and clinical expertise. The goal was to establish guidelines for a predetermined, concise, and logical sequential approach to chronic seizure management starting with seizure identification and diagnosis (not included in this report), reviewing decision‐making, treatment strategies, focusing on issues related to chronic antiepileptic drug treatment response and monitoring, and guidelines to enhance patient response and quality of life. Ultimately, we hope to provide a foundation for ongoing and future clinical epilepsy research in veterinary medicine

    Tunable Superconducting Josephson Dielectric Metamaterial

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    Partial funding for Open Access provided by the UMD Libraries' Open Access Publishing Fund.We demonstrate a low-dissipation dielectric metamaterial with tunable properties based on the Josephson effect. Superconducting wires loaded with regularly spaced Josephson junctions (critical current Ic ≈ 0.25 ÎŒA) spanning a K-band waveguide and aligned with the microwave electric fields create a superconducting dielectric metamaterial. Applied dc current tunes the cutoff frequency and effective permittivity of this unique electric metamaterial. The results are in agreement with an analytical model for microwave transmission through the artificial dielectric medium

    International Veterinary Epilepsy Task Force consensus proposal: Medical treatment of canine epilepsy in Europe

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    In Europe, the number of antiepileptic drugs (AEDs) licensed for dogs has grown considerably over the last years. Nevertheless, the same questions remain, which include, 1) when to start treatment, 2) which drug is best used initially, 3) which adjunctive AED can be advised if treatment with the initial drug is unsatisfactory, and 4) when treatment changes should be considered. In this consensus proposal, an overview is given on the aim of AED treatment, when to start long-term treatment in canine epilepsy and which veterinary AEDs are currently in use for dogs. The consensus proposal for drug treatment protocols, 1) is based on current published evidence-based literature, 2) considers the current legal framework of the cascade regulation for the prescription of veterinary drugs in Europe, and 3) reflects the authors’ experience. With this paper it is aimed to provide a consensus for the management of canine idiopathic epilepsy. Furthermore, for the management of structural epilepsy AEDs are inevitable in addition to treating the underlying cause, if possible

    A prospective cohort study assessing clinical referral management & workforce allocation within a UK regional medical genetics service

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    Abstract Ensuring patient access to genomic information in the face of increasing demand requires clinicians to develop innovative ways of working. This paper presents the first empirical prospective observational cohort study of UK multi-disciplinary genetic service delivery. It describes and explores collaborative working practices including the utilisation and role of clinical geneticists and non-medical genetic counsellors. Six hundred and fifty new patients referred to a regional genetics service were tracked through 850 clinical contacts until discharge. Referral decisions regarding allocation of lead health professional assigned to the case were monitored, including the use of initial clinical contact guidelines. Significant differences were found in the cases led by genetic counsellors and those led by clinical geneticists. Around a sixth, 16.8% (109/650) of referrals were dealt with by a letter back to the referrer or re-directed to another service provider and 14.8% (80/541) of the remaining patients chose not to schedule an appointment. Of the remaining 461 patients, genetic counsellors were allocated as lead health professional for 46.2% (213/461). A further 61 patients did not attend. Of those who did, 86% (345/400) were discharged after one or two appointments. Genetic counsellors contributed to 95% (784/825) of total patient contacts. They provided 93.7% (395/432) of initial contacts and 26.8% (106/395) of patients were discharged at that point. The information from this study informed a planned service re-design. More research is needed to assess the effectiveness and efficiency of different models of collaborative multi-disciplinary working within genetics services. Keywords (MeSH terms) Genetic Services, Genetic Counseling, Interdisciplinary Communication, Cohort Studies, Delivery of Healthcare, Referral and Consultation
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