33 research outputs found

    The Science Performance of JWST as Characterized in Commissioning

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    This paper characterizes the actual science performance of the James Webb Space Telescope (JWST), as determined from the six month commissioning period. We summarize the performance of the spacecraft, telescope, science instruments, and ground system, with an emphasis on differences from pre-launch expectations. Commissioning has made clear that JWST is fully capable of achieving the discoveries for which it was built. Moreover, almost across the board, the science performance of JWST is better than expected; in most cases, JWST will go deeper faster than expected. The telescope and instrument suite have demonstrated the sensitivity, stability, image quality, and spectral range that are necessary to transform our understanding of the cosmos through observations spanning from near-earth asteroids to the most distant galaxies

    The James Webb Space Telescope Mission

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    Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least 4m4m. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the 6.5m6.5m James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 years, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit.Comment: Accepted by PASP for the special issue on The James Webb Space Telescope Overview, 29 pages, 4 figure

    How protein targeting to primary plastids via the endomembrane system could have evolved? A new hypothesis based on phylogenetic studies

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    The Next Disaster… Will Be Televised: An Exploratory Qualitative Media Analysis of Hurricane Preparedness in Television Newscasts

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    Major hurricane landfalls are the most dangerous natural hazard threats experienced in the U.S. Television news is a primary sources of hurricane hazard information and has the ability to influence what viewers understand about and how they respond to these events. While it is understood that media plays a central role in communicating weather, it is unknown whether or not news media content communicates the recommended hurricane hazard adjustments that are needed for preparedness and protection. Thus this study supports prior research calling for a closer examination of the role and effects of visual information in media documents. Using the 2005 Atlantic hurricane season, the present research employs qualitative media analysis to explore the framing of hurricane preparedness through television newscasts covering Hurricane Katrina from August 23-29, 2005. Key findings from this study suggest that there are five common frames through which hurricane information is presented to viewers of the national news broadcasts surveyed in this study. Preparedness information was found to be mainly represented through visual content but sparsely mentioned in reporting. The study also found that more often visuals were used to aid story development instead of provide educational or instructional messages that model the adoption of hazard adjustments and have the potential to motivate protective actions and behaviors by helping to increase self-efficacy. The present study concludes by discussing underlying aspects of conflict present within the media frames and offering recommendations for better integration of media content into risk communication campaigns for severe weather

    TRiO McNair Scholars Undergraduate Research Journal_Fall2012_Vol.1

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    The TRiO McNair Scholars Undergraduate Research Journal is the official publication of the Ronald E. McNair Scholars Program at the University of Illinois at Urbana-Champaign. The journal includes abstracts of the students' final paper and represents combined efforts of students and their research mentors. The views expressed in the papers and abstracts are not intended to represent the views, beliefs, interests, values, or practices of the University of Illinois at Urbana-Champaign.Ronald E. McNair Post-Baccalaureate Achievement Program grant from the U.S. Department of EducationOpe

    TRiO McNair Scholars Undergraduate Research Journal_Fall2012_Vol.1

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    The TRiO McNair Scholars Undergraduate Research Journal is the official publication of the Ronald E. McNair Scholars Program at the University of Illinois at Urbana-Champaign. The journal includes abstracts of the students' final paper and represents combined efforts of students and their research mentors. The views expressed in the papers and abstracts are not intended to represent the views, beliefs, interests, values, or practices of the University of Illinois at Urbana-Champaign.Ronald E. McNair Post-Baccalaureate Achievement Program grant from the U.S. Department of EducationOpe

    TRiO McNair Scholars Undergraduate Research Journal_Spring2013_Vol.1

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    The TRiO McNair Scholars Undergraduate Research Journal is the official publication of the Ronald E. McNair Scholars Program at the University of Illinois at Urbana-Champaign. The journal includes abstracts of the students' final paper and represents combined efforts of students and their research mentors. The views expressed in the papers and abstracts are not intended to represent the views, beliefs, interests, values, or practices of the University of Illinois at Urbana-Champaign.Ronald E. McNair Post-Baccalaureate Achievement Program grant from the U.S. Department of EducationRonald E. McNair Post-Baccalaureate Achievement Program grant from the U.S. Department of EducationOpe
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