1,201 research outputs found

    Direct vitreous reaction to intraocular lens implants

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    Three intraocular lens implants removed during keratoplasty between 1 1/2 and 5 years after implantation revealed attachments of reactive vitreous strands and membranes. These strands and membranes contained bundles of fibers with associated small bipolar cells, pigment, and blood remnants. Some of the fibrous vitreous strands were wound around the haptics of the implants for firm anchoring. The usual reactive cell membranes on the surface of the implants were interrupted in the areas of the attachment of formed vitreous and vitreous membranes. Drei intraokuläre Linsen, die zwischen 1 1/2 und 5 Jahre nach der Implantation während Hornhautverpflanzungen entfernt wurden, zeigten fest anheftende reaktive Glaskörperstränge und verdickte Membranen. Diese enthielten Faserbündel mit zugehörigen kleinen bipolaren Zellen, Pigment und Blutresten. Einige dieser fibrösen Glaskörperstränge waren um die Haptik der Linsenprothesen herumgewunden und damit fest verankert. Die regulären Zellmembranen auf der Oberfläche der Linsenprothesen waren im Bereich der Verbindung mit geformtem Glaskörper und Glaskörpermembranen unterbrochen.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47381/1/417_2005_Article_BF02175942.pd

    Sessile macrophages forming clear endotheliumlike membrane on the inside of successful keratoprosthesis

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    Clinical observation and cytological study of a successful “through and through” type of Cordona keratoprosthesis, which was removed along with a corneal button about 20 years after its implantation in an aphakic eye, revealed an acellular epitheliumlike film on its outer surface, firm anchoring of its supporting skirt by stable fibrous connections to the stroma, and a continuous separating membrane composed of a homogeneous proteinaceous film with fibroblastlike cells of macrophage origin on its inner surface. The significance of the successful adaptation of the plastic materials of the prosthesis to the tissues of the cornea and the fluid of the inner eye for the future of tissue engineering is discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47390/1/417_2005_Article_BF02173533.pd

    Financial Counseling for Low- and Moderate-Income Home Health Care Employees: An Assessment of Take-Up, Engagement, and Outcomes

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    Employee financial wellness programs (EFWPs) are gaining in popularity as a strategy to address workers\u27 financial challenges and goals beyond offering health and retirement benefits. Most workers say they are stressed about their finances1 and a third are less productive at work because of this stress.2 Although employers are increasingly interested in offering EFWPs, little research has been conducted concerning these workplace financial products and services

    Workplace Credit-Building Counseling at a Midwest Employer: An Assessment of Take-Up, Engagement, and Outcomes

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    Employee financial wellness programs (EFWPs) are gaining in popularity as a strategy to address workers\u27 financial challenges and goals beyond offering health and retirement benefits. Most workers say they are stressed about their finances1 and a third are less productive at work because of this stress.2 Although employers are increasingly interested in offering EFWPs, little research has been conducted concerning these workplace financial products and services

    Employer-Sponsored Small-Dollar Loans: An Assessment of Take-Up, Engagement, and Outcomes

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    Employees financial wellness program (EFWPs) are gaining in popularity as a strategy to address workers\u27 financial challenges and goals beyond offering health and retirement benefits. Most workers say they are stressed about their finances1 and a third are less productive at work because of this stress.2 Although employers are increasingly interested in offering EFWPs, little research has been conducted concerning these workplace financial products and services

    The Many Virtues of Second Nature : Habitus in Latin Medieval Philosophy

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    This chapter consists of a systematic introduction to the nature and function of habitus in Latin medieval philosophy. Over the course of this introduction, several topics are treated: the theoretical necessity to posit habitus; their nature; their causal contribution to the production of internal and external acts; how and why habitus can grow and decay; what makes their unity when they can have multiple objects and work in clusters. Finally we examine two specific questions: why intellectual habitus represent a special case that triggered considerable debate; how human beings can be said to be free if their actions are determined by moral habitus

    Assessing L2 vocabulary depth with word associates format tests: issues, findings, and suggestions

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    Word Associates Format (WAF) tests are often used to measure second language learners’ vocabulary depth with a focus on their network knowledge. Yet, there were often many variations in the specific forms of the tests and the ways they were used, which tended to have an impact on learners’ response behaviors and, more importantly, the psychometric properties of the tests. This paper reviews the general practices, key issues, and research findings that pertain to WAF tests in four major areas, including the design features of WAF tests, conditions for test administration, scoring methods, and test-taker characteristics. In each area, a set of variables is identified and described with relevant research findings also presented and discussed. Around eight topics, the General Discussion section provides some suggestions and directions for the development of WAF tests and the use of them as research tools in the future. This paper is hoped to help researchers become better aware that the results generated by a WAF test may vary depending on what specific design the test has, how it is administered and scored, and who the learners are, and consequently, make better decisions in their research that involves a WAF test

    Search for Kaluza-Klein Graviton Emission in ppˉp\bar{p} Collisions at s=1.8\sqrt{s}=1.8 TeV using the Missing Energy Signature

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    We report on a search for direct Kaluza-Klein graviton production in a data sample of 84 pb1{pb}^{-1} of \ppb collisions at s\sqrt{s} = 1.8 TeV, recorded by the Collider Detector at Fermilab. We investigate the final state of large missing transverse energy and one or two high energy jets. We compare the data with the predictions from a 3+1+n3+1+n-dimensional Kaluza-Klein scenario in which gravity becomes strong at the TeV scale. At 95% confidence level (C.L.) for nn=2, 4, and 6 we exclude an effective Planck scale below 1.0, 0.77, and 0.71 TeV, respectively.Comment: Submitted to PRL, 7 pages 4 figures/Revision includes 5 figure

    Measurement of the average time-integrated mixing probability of b-flavored hadrons produced at the Tevatron

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    We have measured the number of like-sign (LS) and opposite-sign (OS) lepton pairs arising from double semileptonic decays of bb and bˉ\bar{b}-hadrons, pair-produced at the Fermilab Tevatron collider. The data samples were collected with the Collider Detector at Fermilab (CDF) during the 1992-1995 collider run by triggering on the existence of μμ\mu \mu and eμe \mu candidates in an event. The observed ratio of LS to OS dileptons leads to a measurement of the average time-integrated mixing probability of all produced bb-flavored hadrons which decay weakly, χˉ=0.152±0.007\bar{\chi} = 0.152 \pm 0.007 (stat.) ±0.011\pm 0.011 (syst.), that is significantly larger than the world average χˉ=0.118±0.005\bar{\chi} = 0.118 \pm 0.005.Comment: 47 pages, 10 figures, 15 tables Submitted to Phys. Rev.

    Measurement of B(t->Wb)/B(t->Wq) at the Collider Detector at Fermilab

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    We present a measurement of the ratio of top-quark branching fractions R= B(t -> Wb)/B(t -> Wq), where q can be a b, s or a d quark, using lepton-plus-jets and dilepton data sets with integrated luminosity of ~162 pb^{-1} collected with the Collider Detector at Fermilab during Run II of the Tevatron. The measurement is derived from the relative numbers of t-tbar events with different multiplicity of identified secondary vertices. We set a lower limit of R > 0.61 at 95% confidence level.Comment: 7 pages, 2 figures, published in Physical Review Letters; changes made to be consistent with published versio
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