4,712 research outputs found
Longitudinal Variation of HO Ice Absorption on Miranda
No full textMany tidally locked icy satellites in the outer Solar System show
leading/trailing hemispherical asymmetries in the strength of near-infrared
(NIR) HO ice absorption bands, in which the absorption bands are stronger
on the leading hemisphere. This is often attributed to a combination of
magnetospheric irradiation effects and impact gardening, which can modify grain
size, expose fresh ice, and produce dark contaminating compounds that reduce
the strength of absorption features. Previous research identified this
leading/trailing asymmetry on the four largest classical Uranian satellites but
did not find a clear leading/trailing asymmetry on Miranda, the smallest and
innermost classical moon. We undertook an extensive observational campaign to
investigate variations of the NIR spectral signature of HO ice with
longitude on Miranda's northern hemisphere. We acquired 22 new spectra with the
TripleSpec spectrograph on the ARC 3.5m telescope and 4 new spectra with GNIRS
on Gemini North. Our analysis also includes 3 unpublished and 7 previously
published spectra taken with SpeX on the 3m IRTF. We confirm that Miranda has
no substantial leading/trailing hemispherical asymmetry in the strength of its
HO ice absorption features. We additionally find evidence for an
anti-Uranus/sub-Uranus asymmetry in the strength of the 1.5-m HO ice
band that is not seen on the other Uranian satellites, suggesting that
additional endogenic or exogenic processes influence the longitudinal
distribution of HO ice band strengths on Miranda.Comment: 40 pages, 19 figures. Accepted for publication in PS
Oral History Interview with Nancy Lieberman, November 8, 2012
No full textInterview with Nancy Lieberman, a sports broadcast journalist. The interview includes biographical information about her life growing up in New York, her time on the first women's Olympic basketball team, and her career as a coach, author, and journalist on ESPN
Promoting Adult Learning Through Civil Discourse in the Public Library
No full textThis chapter investigates the adult learning through civil discourse within public library settings. Crucial to the success of a working democracy, the author traces the history of libraries as locations for the development of an engaged and knowledgeable citizenry.This is the pre-peer reviewed version of the following article: Kranich, Nancy. "Promoting Adult Learning Through Civil Discourse in the Public Library." New Directions for Adult and Continuing Education, no. 127, Fall 2010: 15-24, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/ace.377/pdf.Peer reviewe
Can the First Amendment Coexist with Civility? Response to ‘What Is the Role of Law in Promoting Civility? What Are Its Limits?'
No full textRancorous rhetoric has taken over the public square, causing many citizens to retreat from democratic work. Although self-governance and human dignity benefit when citizens express their views, it takes more than diverse voices to make democracy strong. It takes civility--reasoned public discourse where respect, restraint, responsibility, and empathy coexist with free expression so that fellow citizens can hear each other. And it also takes safe spaces—public forums like those in libraries, where communities come together at the intersection of law and civility and strike their own balance between the boundaries and norms of civil discourse.Originally published in Insights on Law & Society
Nancy Guthrie
No full textNancy Guthrie, author, Nashville, TN, examines two conversations Jesus had, one with his Father, the other with Paul, and how God feels our pain with us
PCA Filtering of Magdalena Ridge Observatory 2.4m PHOTGJON Observations of LCROSS
No full text<p>This archive contains data products from observations of the 2009-10-09 impact of the Lunar CRater Observation and Sensing Satellite (LCROSS) spacecraft on the Moon by the PHOTGJON instrument on the Magdalena Ridge Observatory 2.4m telescope. We use principal component analysis (PCA) filtering both to coregister the raw time series and to effectively remove a static background signal that is spatially and temporally modified by atmospheric and instrumental effects. We iteratively remove principal components from the data through cumulative sequential elimination (CSE) to find a maximum signal-to-noise ratio of the LCROSS ejecta plume signal.</p>
<p>Full details are available in the published journal article:</p>
<p>Strycker, Paul D., Nancy J. Chanover, Ruth L. Temme, Jonathan M. Schotte, Payton L. Mueller, and Emily L. Karls. 2023. "Time Series Analysis Methods and Detectability Factors for Ground-Based Imaging of the LCROSS Impact Plume" <em>Remote Sensing</em> <strong>15</strong>, no. 1: 37. <a href="https://doi.org/10.3390/rs15010037">https://doi.org/10.3390/rs15010037</a></p>
<p>This work was supported by NASA’s Lunar Data Analysis Program through grant number NNX15AP92G.</p>
PCA Filtering of Tortugas Mountain Observatory 0.6m Goodrich Observations of LCROSS
No full text<p>This archive contains the data products from observations of the 2009-10-09 impact of the Lunar CRater Observation and Sensing Satellite (LCROSS) spacecraft on the Moon by the Goodrich instrument on the Tortugas Mountain Observatory 0.6m telescope. We use principal component analysis (PCA) filtering both to coregister the raw time series and to effectively remove a static background signal that is spatially and temporally modified by atmospheric and instrumental effects. We iteratively remove principal components from the data through cumulative sequential elimination (CSE) resulting in a non-detection of the LCROSS ejecta plume signal.</p>
<p>Full details are available in the published journal article:</p>
<p>Strycker, Paul D., Nancy J. Chanover, Ruth L. Temme, Jonathan M. Schotte, Payton L. Mueller, and Emily L. Karls. 2023. "Time Series Analysis Methods and Detectability Factors for Ground-Based Imaging of the LCROSS Impact Plume" <em>Remote Sensing</em> <strong>15</strong>, no. 1: 37. <a href="https://doi.org/10.3390/rs15010037">https://doi.org/10.3390/rs15010037</a></p>
<p>This work was supported by NASA’s Lunar Data Analysis Program through grant number NNX15AP92G.</p>
Deliberative Dialogue: Changing the CD Discourse
No full textThis article provides a brief overview of deliberative dialogue and its useful role in professional development for school librarians.Chapter in Growing Schools: Librarians as Professional Developers (Libraries Unlimited, 2012, pp. 299-302), edited by Debbie Abilock, Kristin Fontichiaro, and Violet H. Harada
PCA Filtering of Magdalena Ridge Observatory 2.4m PHOTDOC Observations of LCROSS
No full text<p>This archive contains data products from observations of the 2009-10-09 impact of the Lunar CRater Observation and Sensing Satellite (LCROSS) spacecraft on the Moon by the PHOTDOC instrument on the Magdalena Ridge Observatory 2.4m telescope. We use principal component analysis (PCA) filtering both to coregister the raw time series and to effectively remove a static background signal that is spatially and temporally modified by atmospheric and instrumental effects. We iteratively remove principal components from the data through cumulative sequential elimination (CSE) to find a maximum signal-to-noise ratio of the LCROSS ejecta plume signal.</p>
<p>Full details are available in the published journal article:</p>
<p>Strycker, Paul D., Nancy J. Chanover, Ruth L. Temme, Jonathan M. Schotte, Payton L. Mueller, and Emily L. Karls. 2023. "Time Series Analysis Methods and Detectability Factors for Ground-Based Imaging of the LCROSS Impact Plume" <em>Remote Sensing</em> <strong>15</strong>, no. 1: 37. <a href="https://doi.org/10.3390/rs15010037">https://doi.org/10.3390/rs15010037</a></p>
<p>This work was supported by NASA’s Lunar Data Analysis Program through grant number NNX15AP92G.</p>
Libraries and Strong Democracy: Moving from an Informed to a Participatory 21st Century Citizenry
No full textDespite almost universal access to schools, libraries, and information, Americans appear no better informed about the issues and choices before them than in earlier days. Citizens are disconnected from one another and new technologies leave many behind in the digital age--some unable to participate fully in community life. If libraries are to continue to meet the personal and civic information needs of their communities, they need to reexamine their core beliefs and strengthen their capacity to move beyond the bounds of informing citizens to engaging them more actively in public life. Today’s libraries are well equipped to serve as active agents of democracy if they take intentional, strategic action to ensure the civic health and information vitality of their communities and their democracy. They have the potential to become the cornerstones of a strong democracy where citizens can come together to make tough choices about issues of common concern.The published version of this article appears in Indiana Libraries, and is available at this location: http://journals.iupui.edu/index.php/IndianaLibraries/article/view/422
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