2,492 research outputs found
Examining the Value of Expert Testimony regarding Warnings
This alternative format session is designed to examine the value of expert testimony related to warnings. Specific objectives of the session include informing HFES members of the views of some members of the legal community who question the value and appropriateness of expert testimony regarding warnings; identifying appropriate responses to such positions; discussing the basic role that experts play in assisting the litigation process; and describing and discussing the perceptions and experiences of HFES members regarding the value of their activities in forensic matters.Yeshttps://us.sagepub.com/en-us/nam/manuscript-submission-guideline
Expanding the parameters of academia
This paper draws on qualitative data gathered from two studies funded by the UK Leadership Foundation for Higher Education to examine the expansion of academic identities in higher education. It builds on Whitchurchâs earlier work, which focused primarily on professional staff, to suggest that the emergence of broadly based projects such as widening participation, learning support and community partnership is also impacting on academic identities. Thus, academic as well as professional staff are increasingly likely to work in multi-professional teams across a variety of constituencies, as well as with external partners, and the binary distinction between âacademicâ and ânon-academicâ roles and activities is no longer clear-cut. Moreover, there is evidence from the studies of an intentionality about deviations from mainstream academic career routes among respondents who could have gone either way. Consideration is therefore given to factors that influence individuals to work in more project-oriented areas, as well as to variables that affect ways in which these roles and identities develop. Finally, three models of academically oriented project activity are identified, and the implications of an expansion of academic identities are reviewed
Collective Modes of Tri-Nuclear Molecules
A geometrical model for tri-nuclear molecules is presented. An analytical
solution is obtained provided the nuclei, which are taken to be prolately
deformed, are connected in line to each other. Furthermore, the tri-nuclear
molecule is composed of two heavy and one light cluster, the later sandwiched
between the two heavy clusters. A basis is constructed in which Hamiltonians of
more general configurations can be diagonalized. In the calculation of the
interaction between the clusters higher multipole deformations are taken into
account, including the hexadecupole one. A repulsive nuclear core is introduced
in the potential in order to insure a quasi-stable configuration of the system.
The model is applied to three nuclear molecules, namely Sr + Be +
Ba, Mo + Be + Te and Ru + Be +
Sn.Comment: 24 pages, 9 figure
All-Sky Search for Long-Duration Gravitational Wave Transients in the First Advanced LIGO Observing Run
We present the results of a search for long-duration gravitational wave transients in the data of the LIGO Hanford and LIGO Livingston second generation detectors between and , with a total observational time of . The search targets gravitational wave transients of 10â500âs duration in a frequency band of 24â2048 Hz, with minimal assumptions about the signal waveform, polarization, source direction, or time of occurrence. No significant events were observed. As a result we set 90% confidence upper limits on the rate of long-duration gravitational wave transients for different types of gravitational wave signals. We also show that the search is sensitive to sources in the Galaxy emitting at leastââ~10â8 in gravitational waves
Embedding CETLs in a performance-oriented culture in higher education : Reflections on finding creative space
Search for Gravitational Waves Associated with Gamma-Ray Bursts During the First Advanced LIGO Observing Run and Implications for the Origin of GRB 150906B
We present the results of the search for gravitational waves (GWs) associated with Îł-ray bursts detected during the first observing run of the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO). We find no evidence of a GW signal for any of the 41 Îł-ray bursts for which LIGO data are available with sufficient duration. For all Îł-ray bursts, we place lower bounds on the distance to the source using the optimistic assumption that GWs with an energy of were emitted within the â Hz band, and we find a median 90% confidence limit of 71 Mpc at 150 Hz. For the subset of 19 short/hard Îł-ray bursts, we place lower bounds on distance with a median 90% confidence limit of 90 Mpc for binary neutron star (BNS) coalescences, and 150 and 139 Mpc for neutron starâblack hole coalescences with spins aligned to the orbital angular momentum and in a generic configuration, respectively. These are the highest distance limits ever achieved by GW searches. We also discuss in detail the results of the search for GWs associated with GRB 150906B, an event that was localized by the InterPlanetary Network near the local galaxy NGC 3313, which is at a luminosity distance of Mpc (z = 0.0124). Assuming the Îł-ray emission is beamed with a jet half-opening angle , we exclude a BNS and a neutron starâblack hole in NGC 3313 as the progenitor of this event with confidence \u3e99%. Further, we exclude such progenitors up to a distance of 102 Mpc and 170 Mpc, respectively
âGood Farmersâ in Sub-Saharan Africa: Evolving Narratives
In this paper the example of cocoa production in Ghana is used to explore how the narratives portraying African farmers have changed over the last 70 years. These evolving narratives are explored through the notion of a âgood farmerâ. The argument is that over this period the image of African farmers has been progressively rehabilitated, from ignorant and tradition-bound to skilled and research-minded. Over the same time period the image of formal research and extension was undermined. With the recent renewed interest in agriculture, narratives around African farmers are again evolving: âgood farmersâ are now increasingly being defined as those who approach their farming as a proper business.DfI
Mapping the Growth and Demographics of Managerial and Professional Staff in Higher Education
This chapter presents a descriptive analysis of the growth of managerial and professional staff from Fall 1993 to Fall 2011 across institution types and sectors, and a detailed snapshot of the demographic composition of these staff in Fall 2016. Our results indicate tremendous growth in the population of nonâfaculty staff over time, and reveal key patterns in staff employment by gender and race/ethnicity.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/154664/1/he20352.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/154664/2/he20352_am.pd
Higher Order Processes in Electromagnetic Production of Electron Positron Pairs in Relativistic Heavy Ion Collisions
We study higher-order effects in the electromagnetic production of
electron-positron pairs in relativistic heavy ion collisions. Treating the
field of the heavy ions as an external field and neglecting the interaction
among electrons and positrons, we show that the -pair creation amplitude is
the antisymmetrised product of one-pair creation amplitudes and the vacuum
amplitude. Neglecting contributions coming from exchange terms, we show that
the total probability for pairs is approximately a Poisson distribution. We
investigate further the structure of the reduced one-pair amplitude,
concentrating especially on multiple-particle corrections. We calculate the
first of these corrections in second order Magnus theory based on our previous
result in second-order Born approximation for impact parameter zero.
Explicit calculations show that the total probability is increased up to 10 \%
by this correction for realistic collider parameters. The calculations can also
be used to confirm the use of the Poisson distribution for the total
probability.Comment: 29 pages RevTeX and 12 uuencoded figures (compressed postscript
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