76,573 research outputs found

    Deformation invariance of rational pairs

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    Rational pairs, recently introduced by Koll\'ar and Kov\'acs, generalize rational singularities to pairs (X,D)(X,D). Here XX is a normal variety and DD is a reduced divisor on XX. Integral to the definition of a rational pair is the notion of a thrifty resolution, also defined by Koll\'ar and Kov\'acs, and in order to work with rational pairs it is often necessary to know whether a given resolution is thrifty. In this paper we present several foundational results that are helpful for identifying thrifty resolutions and analyzing their behavior. We also show that general hyperplane sections of rational pairs are again rational. In 1978, Elkik proved that rational singularities are deformation invariant. Our main result is an analogue of this theorem for rational pairs: given a flat family XSX\to S and a Cartier divisor DD on XX, if the fibers over a smooth point sSs\in S form a rational pair, then (X,D)(X,D) is also rational near the fiber XsX_s.Comment: 17 pages. Version 3: added a corollary about proper families over a curve, and a Bertini-type theorem for rational pair

    A Review of Selected E-Recruiting Websites: Disability Accessibility Considerations

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    Ten job boards1 and 31 corporate E-recruiting websites were evaluated for accessibility for people with disabilities. The examination was performed using both an automated accessibility testing software (Bobby v3.2) and an examination of a sub-sample of the sites through a “simulated” application process. The simulated application process was performed utilizing only the information available to a screen reader and navigating the site using only keyboard commands, duplicating how a blind individual would typically navigate the web. The purpose of this second method was to see if it would be possible to successfully proceed through the entire multi-step job search and application process. None of the job board pages (home, job search, signup, or resumé submittal pages) evaluated by Bobby were found to be accessible. The vast majority of corporate E-recruiting sites also failed Bobby’s tests. The simulated application process evaluation was slightly more promising, but still only three of the nine job boards and three of the twelve corporate sites evaluated were accessible enough to work through the entire process of registration, job searching, resumé submittal, and application for a position. Many of the issues encountered could easily be corrected through the consistent use of alternative text for essential submit image buttons (i.e. “apply,” “post resumé”)

    Progress Along the Pathway for Transforming Regional Health: A Pulse Check on Multi-Sector Partnerships

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    Multi-sector partnerships play an increasingly significant role in the movement to improve heath, equity, and economic prosperity. These partnerships recognize that many of our most pressing challenges defy sector boundaries, and cannot be effectively addressed by any one institution alone. Progress Along the Pathway to Health System Transformation: A Pulse Check on Multi-Sector Partnerships is the only survey of its kind to ask leaders across the U.S. what their partnerships do, how they finance their work, and how their groups have been developing over time. The 2016 Pulse Check report provides a snapshot of 237 multi-sector partnerships throughout the country as well as rich detail around what contributes to—or gets in the way of—moving their important work forward. The survey revealed two sets of findings that are distinct, but closely related. These include characteristics of the partnerships and their efforts, such as composition, portfolio priorities, and financing; as well as developmental phases and the distinctive patterns of momentum builders and pitfalls that groups experience as they evolve. Further, ReThink Health has found that partnerships often face predictable challenges and can catalyze momentum in particularly powerful ways. The Pulse Check explored these barriers and drivers with a view toward understanding how partnerships may evolve along their journey. Pulse Check findings indicate that certain partnership characteristics do indeed show progressive differences across developmental phases (see graphic below). For instance, when compared to respondents in the Earlier and Middle phases, those in the Later phase tend to have partnerships that are more established, with larger staffs, a larger number active sectors, more expansive action portfolios, and longer-term financial plans

    Review of The Future of Life, by Edward O. Wilson

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    [Excerpt] It is refreshing to read an environmental diatribe where the writer has both the authority of a world expert and a willingness to compromise to pursue realistic solutions. Wilson is a Harvard biology professor, two-time Pulitzer Prize winner, and a director of the Nature Conservancy. In The Future of Life, he presents a succinct evaluation of the great ecological issues of our day, focusing on the rapid pace of species extinctions, and on the promise of finding a balance between conservation and human activity that will bring the extinctions to a halt

    Psychiatry and the Law: An Attempt at Synthesis

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