7 research outputs found

    Hitomi (ASTRO-H) X-ray Astronomy Satellite

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    The Hitomi (ASTRO-H) mission is the sixth Japanese x-ray astronomy satellite developed by a large international collaboration, including Japan, USA, Canada, and Europe. The mission aimed to provide the highest energy resolution ever achieved at E  >  2  keV, using a microcalorimeter instrument, and to cover a wide energy range spanning four decades in energy from soft x-rays to gamma rays. After a successful launch on February 17, 2016, the spacecraft lost its function on March 26, 2016, but the commissioning phase for about a month provided valuable information on the onboard instruments and the spacecraft system, including astrophysical results obtained from first light observations. The paper describes the Hitomi (ASTRO-H) mission, its capabilities, the initial operation, and the instruments/spacecraft performances confirmed during the commissioning operations for about a month

    Genome-wide Analyses Identify KIF5A as a Novel ALS Gene

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    To identify novel genes associated with ALS, we undertook two lines of investigation. We carried out a genome-wide association study comparing 20,806 ALS cases and 59,804 controls. Independently, we performed a rare variant burden analysis comparing 1,138 index familial ALS cases and 19,494 controls. Through both approaches, we identified kinesin family member 5A (KIF5A) as a novel gene associated with ALS. Interestingly, mutations predominantly in the N-terminal motor domain of KIF5A are causative for two neurodegenerative diseases: hereditary spastic paraplegia (SPG10) and Charcot-Marie-Tooth type 2 (CMT2). In contrast, ALS-associated mutations are primarily located at the C-terminal cargo-binding tail domain and patients harboring loss-of-function mutations displayed an extended survival relative to typical ALS cases. Taken together, these results broaden the phenotype spectrum resulting from mutations in KIF5A and strengthen the role of cytoskeletal defects in the pathogenesis of ALS.Peer reviewe

    Visual Literacy, Knowledge Generation and the Academic Library

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    The organization and visual representation of knowledge as presented in academic libraries is becoming less relevant to today’s university student. With the advent of electronic databases in the 1960s continuing through the current environment where full text electronic journal content is the norm, print journal holdings are quickly becoming archive or legacy collections which are rarely used by today’s students. Basically, students rarely need to look for and retrieve physical journals from library shelves as online, full-text versions have replaced physical copies. Student library research today typically involves searching one or more electronic databases for articles usually on a particular topic or subject, identifying the relevant titles and saving the results on an electronic device or citation manager. Since the student no longer needs the journal article citation elements – that is the journal title, volume, number, year, and page number to look for and find the article itself – the citation itself is becoming irrelevant in real practical sense. It could be argued that the Digital Object Identifier (DOI) is more relevant than the citation. But also in a greater and more significant sense, because the student no longer needs to go to the physical journal collection, look for and find the journal title and see the sequential and discrete volumes and issues, the organization of published research literature is no longer visually obvious. The continuous generation of knowledge and the ongoing publication of research findings in a particular discipline as represented by the physical volumes of a particular journal are no longer visually experienced by the student. In a very real sense, the contrast between the elements of the traditional journal citation and the relatively new (implemented around 2000) DOI illustrates this point. The journal citation tells the student where that one article or piece of research fits within a broader scope and timeline while the purpose and function of the DOI is to only identify the singular object. Without the visual representation and use of the library’s physical journal collection, librarians and faculty cannot assume students intuitively understand the traditional organization and presentation of published knowledge. This subtle yet profound change should be recognized and addressed by the academy and in the curriculum
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