375 research outputs found
The Regulation of Employee Stock Options after Code Section 409A: A Proposal for Reform and a Survival Kit for the Interim
Article published in the Michigan State University School of Law Student Scholarship Collection
Need Exceeds Space: A Serials Withdrawal Project at the University of Rhode Island University Libraries
In 2009, the University of Rhode Island’s main library, the Robert L. Carothers Library and Learning Commons in Kingston, initiated a pilot serials withdrawal project when the need for space for new services exceeded the space available in the library. A joint venture between Acquisitions and Access Services, the successful pilot led to a subsequent withdrawal project in summer 2010 to free additional space in the library. The print journals targeted for withdrawal were ones to which the library had online access through licensed journal archives. Considerations on what to withdraw, the process of identifying titles for withdrawal, and the logistics of managing the withdrawal of more than 35,000 volumes are described
The Regulation of Employee Stock Options after Code Section 409A: A Proposal for Reform and a Survival Kit for the Interim
Article published in the Michigan State University School of Law Student Scholarship Collection
What Are They Doing Anyway?: Library as Place and Student Use of a University Library
Objective - To determine student use of library spaces, the authors recorded student location and behaviors within the Library, to inform future space design.
Methods - The case study method was used with both quantitative and qualitative measures. The authors had two objectives to guide this assessment of library spaces: 1) To determine what library spaces are being used by students and whether students are working individually, communally, or collaboratively and 2) To determine whether students use these spaces for learning activities and/or social engagement.
Results - After data collection and analysis, the authors determined students are using individual or communal spaces almost equally as compared with collaborative group spaces. Data also revealed peak area usage and times.
Conclusion - Observed student individual and social work habits indicate further need for spaces with ample electrical outlets and moveable tables. Further study is recommended to see whether additional seating and renovated spaces continue to enhance informal learning communities at URI and whether the Library is becoming a “third place” on campus
Quasi-Periodic Pulsations during the Impulsive and Decay phases of an X-class Flare
Quasi-periodic pulsations (QPP) are often observed in X-ray emission from
solar flares. To date, it is unclear what their physical origins are. Here, we
present a multi-instrument investigation of the nature of QPP during the
impulsive and decay phases of the X1.0 flare of 28 October 2013. We focus on
the character of the fine structure pulsations evident in the soft X-ray time
derivatives and compare this variability with structure across multiple
wavelengths including hard X-ray and microwave emission. We find that during
the impulsive phase of the flare, high correlations between pulsations in the
thermal and non-thermal emissions are seen. A characteristic timescale of ~20s
is observed in all channels and a second timescale of ~55s is observed in the
non-thermal emissions. Soft X-ray pulsations are seen to persist into the decay
phase of this flare, up to 20 minutes after the non-thermal emission has
ceased. We find that these decay phase thermal pulsations have very small
amplitude and show an increase in characteristic timescale from ~40s up to
~70s. We interpret the bursty nature of the co-existing multi-wavelength QPP
during the impulsive phase in terms of episodic particle acceleration and
plasma heating. The persistent thermal decay phase QPP are most likely
connected with compressive MHD processes in the post-flare loops such as the
fast sausage mode or the vertical kink mode.Comment: 7 pages, 4 figures, 1 tabl
Rapid Acceleration of a Coronal Mass Ejection in the Low Corona and Implications of Propagation
A high-velocity Coronal Mass Ejection (CME) associated with the 2002 April 21 X1.5 flare is studied using a unique set of observations from the Transition Region and Coronal Explorer (TRACE), the Ultraviolet Coronagraph Spectrometer (UVCS), and the Large-Angle Spectrometric Coronagraph (LASCO). The event is first observed as a rapid rise in GOES X-rays, followed by simultaneous conjugate footpoint brightenings connected by an ascending loop or flux-rope feature. While expanding, the appearance of the feature remains remarkably constant as it passes through the TRACE 195 A passband and LASCO fields-of-view, allowing its height-time behavior to be accurately determined. An analytic function, having exponential and linear components, is found to represent the height-time evolution of the CME in the range 1.05-26 R. The CME acceleration rises exponentially to approx. 900 km/sq s within approximately 20-min, peaking at approx.1400 m/sq s when the leading edge is at approx. 1.7 R. The acceleration subsequently falls off as a slowly varying exponential for approx.,90-min. At distances beyond approx. 3.4 R, the height-time profile is approximately linear with a constant velocity of approx. 2400 km/s. These results are briefly discussed in light of recent kinematic models of CMEs
Detection and Interpretation Of Long-Lived X-Ray Quasi-Periodic Pulsations in the X-Class Solar Flare On 2013 May 14
Quasi-periodic pulsations (QPP) seen in the time derivative of the GOES soft
X-ray light curves are analyzed for the near-limb X3.2 event on 14 May 2013.
The pulsations are apparent for a total of at least two hours from the
impulsive phase to well into the decay phase, with a total of 163 distinct
pulses evident to the naked eye. A wavelet analysis shows that the
characteristic time scale of these pulsations increases systematically from
25 s at 01:10 UT, the time of the GOES peak, to 100 s at 02:00 UT.
A second ridge in the wavelet power spectrum, most likely associated with
flaring emission from a different active region, shows an increase from
40 s at 01:40 UT to 100 s at 03:10 UT. We assume that the QPP that
produced the first ridge result from vertical kink-mode oscillations of the
newly formed loops following magnetic reconnection in the coronal current
sheet. This allows us to estimate the magnetic field strength as a function of
altitude given the density, loop length, and QPP time scale as functions of
time determined from the GOES light curves and RHESSI images. The calculated
magnetic field strength of the newly formed loops ranges from about 500 G
at an altitude of 24 Mm to a low value of 10 G at 60 Mm, in general
agreement with the expected values at these altitudes. Fast sausage mode
oscillations are also discussed and cannot be ruled out as an alternate
mechanism for producing the QPP
The Open Navigation Surface Project
Many hydrographic and oceanographic agencies have moved or are moving towards gridded bathymetric products. However, there is no accepted format to allow these grids to be exchanged while maintaining data and metadata integrity. This paper describes the Open Navigation Surface (ONS) Project, which aims to fill this gap. The ONS Project is an open-source software project designed to provide a freely available, portable source-code library to encapsulate gridded bathymetric surfaces with associated uncertainty values. The data file format is called a Bathymetric Attributed Grid (BAG). The BAG is developed and maintained by the ONS Working Group (ONSWG), and the source code is available via the ONS websit
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