On lower bounds for the matching number of subcubic graphs

We give a complete description of the set of triples (a,b,c) of real numbers with the following property. There exists a constant K such that a n_3 + b n_2 + c n_1 - K is a lower bound for the matching number of every connected subcubic graph G, where n_i denotes the number of vertices of degree i for each i

The Sulzer Hip Replacement Recall Crisis: A Patient\u27s Perspective

This case discusses a product recall that resulted from a manufacturing defect and the degree to which the company distributed accurate and timely information to affected patients. More specifically, the case examines the crisis communication of Sulzer Orthopedics and its efforts to negotiate the interests of various stakeholders, while limiting liability. Written from the perspective of a patient, the case raises interesting questions regarding organizational duties related to product liability. It also provides valuable insights into how organizational communication may have both short- and long-term effects on its relationship with patients and physicians, among others

Where They Lead, I Will Follow: Serving Remote Graduate Student Populations

In 2012, the University of San Francisco\u27s School of Management underwent a monumental change in both location and student access to academic services. In that year, all classes and most staff and student services for the MBA and other business graduate programs were relocated to a new site near the Financial District, which is across the city from the main campus. Suddenly, a major group of my service population was no longer on campus near me or near the library! In this poster, I will describe the process I undertook to remain visible and accessible to this important group of students, staff, and faculty. In a fortunate turn of events, the work to re-establish my services with our graduate business students combined my concern about remaining connected to them with a professional passion of mine, embedded librarianship. In this poster, I’ll summarize the process, including what worked well, what didn’t, the kinds of feedback I’ve received and how it has been incorporated, the other services that have resulted from my outreach efforts, as well as hopes for the future

Caustic Structures and Detectability of Circumbinary Planets in Microlensing

Recent discoveries of circumbinary planets in Kepler data show that there is a viable channel of planet formation around binary main sequence stars. Motivated by these discoveries, we have investigated the caustic structures and detectability of circumbinary planets in microlensing events. We have produced a suite of animations of caustics as a function of the projected separation and angle of the binary host to efficiently explore caustic structures over the entire circumbinary parameter space. Aided by these animations, we have derived a semi-empirical analytic expression for the location of planetary caustics, which are displaced in circumbinary lenses relative to those of planets with a single host. We have used this expression to show that the dominant source of caustic motion will be due to the planet's orbital motion and not that of the binary star. Finally, we estimate the fraction of circumbinary microlensing events that are recognizable as such to be significant (5-50 percent) for binary projected separations in the range 0.1-0.5 in units of Einstein radii.Comment: 15 pages, 1 table, 18 figures. Accepted for publication in Ap

Environmental Scan of Off-Site Reference in Academic Libraries

Taking library services outside of the library seems to be a growing trend in academic libraries, but is it really? In 2011 Stephan and Scott conducted an online survey of academic libraries to measure how and if off-site reference is being utilized in academic libraries in order to provide a snapshot of current and past off-site reference trends. Broken down into four sections, the poster will look at the four questions asked of survey participants: · Those who currently hold off-site reference hours · Those held off-site reference hours in the past but stopped · Those who have never held off-site reference hours in the past, but plan to offer them in the future. · Those who have never held off-site reference hours and would not consider it in the future The poster will present, among other things, how programs were developed, if they were individual or library-wide programs, why programs stopped, and why people weren’t interested in holding off-site hours

Exploring exoplanetary systems beyond 1AU with WFIRST

The Wide Field InfraRed Survey Telescope (WFIRST) was the top ranked large space mission of the New Worlds, New Horizons Decadal Survey, and is currently under active study by NASA. Its primary instrument will be a large-format high-resolution near-infrared imager and slitless spectrometer. A primary goal of WFIRST will be to perform a high-cadence microlensing survey of the Galactic bulge to search for low-mass exoplanets beyond the ice line. We highlight some of the expected results of the WFIRST exoplanet survey. For example, the survey will probe the abundance of Earth-mass planets from less than 1 AU outwards, including free-floating planets. In its peak sensitivity range of ~2-5 AU, WFIRST will be sensitive to planets with masses lower than Mercury, and even down to the mass of Ganymede. Overall, WFIRST is expected to detect several thousand bound planets, in addition to several thousand free-floating planets. WFIRST will complete the exoplanet census begun by Kepler, enabling an unprecedented understanding of planetary systems and their formation. Copyright © 2013, International Astronomical Union

Intron length distributions and gene prediction

Accurate gene prediction in eukaryotes is a difficult and subtle problem. Here we point out a useful feature of expected distributions of spliceosomal intron lengths. Since introns are removed from transcripts prior to translation, intron lengths are not expected to respect coding frame, thus the number of genomic introns that are a multiple of three bases (‘3n introns’) should be similar to the number that are a multiple of three plus one bases (or plus two bases). Skewed predicted intron length distributions thus suggest systematic errors in intron prediction. For instance, a genome-wide excess of 3n introns suggests that many internal exonic sequences have been incorrectly called introns, whereas a deficit of 3n introns suggests that many 3n introns that lack stop codons have been mistaken for exonic sequence. A survey of genomic annotations for 29 diverse eukaryotic species showed that skew in intron length distributions is a common problem. We discuss several examples of skews in genome-wide intron length distributions that indicate systematic problems with gene prediction. We suggest that evaluation of length distributions of predicted introns is a fast and simple method for detecting a variety of possible systematic biases in gene prediction or even problems with genome assemblies, and discuss ways in which these insights could be incorporated into genome annotation protocols

How Do We Explain ‛Autistic Traits’ in European Upper Palaeolithic Art?

Traits in Upper Palaeolithic art which are also seen in the work of talented artists with autism, including an exceptional realism, remain to be explained. Debate over explanations has been heated, ranging from such art having been created by individuals with autism spectrum conditions, to being influenced by such individuals, to being a product of the use of psychotropic drugs. Here we argue that 'autistic traits' in art, such as extreme realism, are the product of local processing bias or detail focus. The significance of local processing bias has implications for our understanding of Upper Palaeolithic society

Autism spectrum conditions affect preferences in valued personal possessions

Although autism has been characterised as a disorder certain selective advantages of autism have been identified which may represent a selective trade-off for reduced ‘folk psychology’ and provide a potential explanation for the incorporation of autism genes in the human evolutionary past. Such potential trade-off skills remain to be explored in terms of selectively advantageous or disadvantageous behaviours in the distant past however. Here we present the results of an analysis of the relationship between AQ (autism quotient) and attitudes to valued personal possessions on the basis of a study of 550 participants. We find that individuals with autism have a reduced tendency to value and preserve objects as reminders of relationships/attachment figures and place a greater value on the direct practical function of their personal possessions. The latter strategy may have been more selectively advantageous in certain contexts whilst less advantageous in others in the distant evolutionary past