A Surrogate Model of Gravitational Waveforms from Numerical Relativity Simulations of Precessing Binary Black Hole Mergers

We present the first surrogate model for gravitational waveforms from the coalescence of precessing binary black holes. We call this surrogate model NRSur4d2s. Our methodology significantly extends recently introduced reduced-order and surrogate modeling techniques, and is capable of directly modeling numerical relativity waveforms without introducing phenomenological assumptions or approximations to general relativity. Motivated by GW150914, LIGO's first detection of gravitational waves from merging black holes, the model is built from a set of $276$ numerical relativity (NR) simulations with mass ratios $q \leq 2$, dimensionless spin magnitudes up to $0.8$, and the restriction that the initial spin of the smaller black hole lies along the axis of orbital angular momentum. It produces waveforms which begin $\sim 30$ gravitational wave cycles before merger and continue through ringdown, and which contain the effects of precession as well as all $\ell \in \{2, 3\}$ spin-weighted spherical-harmonic modes. We perform cross-validation studies to compare the model to NR waveforms \emph{not} used to build the model, and find a better agreement within the parameter range of the model than other, state-of-the-art precessing waveform models, with typical mismatches of $10^{-3}$. We also construct a frequency domain surrogate model (called NRSur4d2s_FDROM) which can be evaluated in $50\, \mathrm{ms}$ and is suitable for performing parameter estimation studies on gravitational wave detections similar to GW150914.Comment: 34 pages, 26 figure

Do GAAP And IFRS Differ In Collectiblity Judgments Related To Revenue Recognition?

The goal of this study is to examine whether financial statement preparers may interpret the collectibility threshold differently given the differences in the prior definitions of “probable” in IFRS and GAAP. We conducted an experiment where participants were provided with either the IFRS or GAAP definition of “probable” and then asked to evaluate five short revenue recognition scenarios. We find that their judgments regarding collectibility of consideration did not differ across the IFRS or GAAP conditions. This study contributes to the prior accounting literature on interpreting vague verbal probability terms and expands this line of work to the arena of revenue recognition. Our results also provide insight for standard setter and policy makers in their efforts to achieve true convergence in accounting standards.

Supporting Department Chair Development: Learnings from the Leadership Cohort

This best practice presentation will highlight key features, benefits and challenges of a cohort-based leadership development program for chairs. We’ll engage with sample materials and activities used during cohort meetings and share recommendations for those looking to initiate leadership development programs on their campus

Leadership Development for Department Chairs: Learnings Across Three Approaches

This session shares insights and recommendations from three approaches to faculty leadership development: a co-mentoring group for faculty leaders; a community of practice for mentoring; and a leadership development cohort. Participants will be invited assess and revise these recommendations to jointly inform best practices in faculty leadership development

788-3 Effect of Body Composition on Exercise Performance in Patients with Heart Failure

Changes in fat and skeletal muscle Volume may contribute to the exercise intolerance reported by patients with heart failure. To test this hypothesis, we measured hemodynamic and ventilatory responses to exercise in 65 patients with chronic heart failure. Body composition was determined by dual-energy x-ray absorptiometry. Peak exercise VO2 averaged 13.2±2.9ml/min/kg, peak exercise cardiac index 4.5±1.1 L/min/m2, lean body weight 55±12kg, lean leg weight 17.2±3.8kg and total fat 27±11kg. Thirty-eight (58%) of the patients were obese, as defined by a percentage fat >30%. Twenty-four patients (37%) exhibited lean body wt/height <300gm/cm, consistent with muscle atrophy. Peak exercise VO2 correlated closely with total leg muscle:There was no relationship between VO2/gm leg muscle and the lean body wt/height index, suggesting that muscle atrophy does not affect muscle performance/unit of muscle. VO2/kg muscle was higher in obese vs non-obese patients (72+14 vs 59+13 mllmin/kg (p<0.01) whereas peak VO2/kg body weight was similar (13.0+3.3 vs 13.2+2.6 mllmin/kg). since body weight inCludes fat. These findings suggest that skeletal muscle volume influences exercise capacity in patients with heart failure. Exercise capacity in obese patients is underestimated by normalizing for body weight

Mentorship in the Field of Aging: Purposes, Pivots, and Priorities

The Gerontological Society of America (GSA) is a multi-disciplinary organization dedicated to advancing the field of aging and improving the lives of older adults. With a long-standing commitment to mentorship and career development, this article focuses on GSA’s Mentoring Consultancies and Career Conversations events and their pivot to meet the needs and demands of current and future gerontologists amid the COVID-19 pandemic. This article provides a description of these events in the context of planning, content, and member engagement. Recommendations are provided to other organizations seeking to enrich their membership through mentorship and career development activities

Development of FuGO: An ontology for functional genomics investigations

The development of the Functional Genomics Investigation Ontology (FuGO) is a collaborative, international effort that will provide a resource for annotating functional genomics investigations, including the study design, protocols and instrumentation used, the data generated and the types of analysis performed on the data. FuGO will contain both terms that are universal to all functional genomics investigations and those that are domain specific. In this way, the ontology will serve as the “semantic glue” to provide a common understanding of data from across these disparate data sources. In addition, FuGO will reference out to existing mature ontologies to avoid the need to duplicate these resources, and will do so in such a way as to enable their ease of use in annotation. This project is in the early stages of development; the paper will describe efforts to initiate the project, the scope and organization of the project, the work accomplished to date, and the challenges encountered, as well as future plans

The pseudorabies virus protein, pUL56, enhances virus dissemination and virulence but is dispensable for axonal transport

Neurotropic herpesviruses exit the peripheral nervous system and return to exposed body surfaces following reactivation from latency. The pUS9 protein is a critical viral effector of the anterograde axonal transport that underlies this process. We recently reported that while pUS9 increases the frequency of sorting of newly assembled pseudorabies virus particles to axons from the neural soma during egress, subsequent axonal transport of individual virus particles occurs with wild-type kinetics in the absence of the protein. Here, we examine the role of a related pseudorabies virus protein, pUL56, during neuronal infection. The findings indicate that pUL56 is a virulence factor that supports virus dissemination in vivo, yet along with pUS9, is dispensable for axonal transport

Improved grade outcomes with an e-mailed “grade nudge”

Information provided at the moment a person makes a decision can influence behavior in predictable ways. The United Kingdom\u27s Behavioural Insights Team have used this idea to help improve the insulation of lofts, collect taxes, and even reduce litter. The authors of this article developed software that appends a personalized message to each assignment in the class regarding the student\u27s current grade. This “grade nudge” explains precisely how the assignment will impact the student\u27s final grade given their current standing in the class. Through a randomized trial, the authors show that the nudge improves student homework performance by about four percentage points

Institutionalizing Faculty Mentoring within a Community of Practice Model

In higher education, faculty work is typically enacted—and rewarded—on an individual basis. Efforts to promote collaboration run counter to the individual and competitive reward systems that characterize higher education. Mentoring initiatives that promote faculty collaboration and support also defy the structural and cultural norms of higher education. Collaborative mentoring initiatives, however, support all faculty to be lifelong learners. We analyze a reciprocal model of mentoring—a community of practice for mentoring—that integrates collaborative mentoring into faculty’s daily work. Additionally, we examine the dilemmas, benefits, and costs of institutionalizing a community of practice model for mentoring in higher education. Our analyses indicate that communities of practice can be fruitful sites of mentoring for all faculty when members mutually engage in shared practices required by the institution. Additionally, such communities nurture relationships and emotional support that sustain engagement in practice and reduce isolation. Given these benefits, we argue that communities of practice should be publically recognized at the institutional level as viable mechanisms for faculty mentoring and learning. Institutions of higher education must explicitly support a campus culture of collaboration and lifelong learning. Findings offer guidance for faculty and center for teaching and learning (CTL) interested in starting or participating in communities of practice