The sense of belonging in sermon-based small groups

https://place.asburyseminary.edu/ecommonsatsdissertations/1843/thumbnail.jp

Suggestions For Successfully Establishing A University Selling Center

The authors describe the multiple benefits a university selling center offers to students, faculty members, administrators, and the general business community.  The seven essential steps in first establishing a university selling center are addressed:  find a champion, obtain the support of administration, find a white knight, establish a board of advisors, develop a mission, develop a facilities and technology plan, and develop the sales curriculum.  In discussing these steps, the authors present both their experiences and discuss the literature in these areas.  The authors also discuss what one should do after the selling center is established and future needs that a selling center might address

MICROSCALE TESTING AND CHARACTERIZATION TECHNIQUES FOR BENCHMARKING CRYSTAL PLASTICITY MODELS

The desire to improve the performance of engineering alloys and introduce new materials into service has led to the development of advanced, multi-scale material property models that can accurately predict the deformation response of polycrystalline microstructures. These microstructure-dependent, multi-scale models have the ability to provide insight into the connections between material processing, microstructure and properties in a way that has not been available before. However, these advanced modeling techniques require microstructural characterization and experimentally obtained benchmarks at salient length scales. Accordingly, microtensile tests of the polycrystalline Ni-base superalloy René 88DT have been carried out in order to guide and benchmark parallel crystal plasticity finite element method (CPFEM) modeling of this material at appropriate length scales. Microscale machining processes, including wire electrical discharge machining (EDM), focused ion beam (FIB) and femtosecond laser machining, have been developed and optimized for machining microtensile samples across multiple sizes. Loading in uniaxial tension provides the full stress-strain behavior from which quantitative mechanical benchmarks such as yield strength, strain hardening, and modulus can be extracted. The effect of sample size was studied to observe the underlying effects of microstructural variations. It was found that average sample strength decreased, and stochasticity of strength increased, as sample size decreased, owing to a finite sampling of grain orientations with a biased distribution towards higher Schmid factor values for grains in a randomly textured FCC material. In addition, local strain accumulation on the surface of tested oligocrystalline samples, with a computationally tractable number of grains, has been measured through the use of 2D digital image correlation (DIC). It was observed that strain concentrations formed in regions of the microstructure where there was a significant mismatch in Schmid factor and elastic modulus across grain and twin boundaries, a microstructural feature that leads to local stress concentrations. These observations help to guide model development in highlighting deformation mechanisms in the material, and the developed strain maps provide both quantitative and qualitative benchmarks that can be directly compared with modeling results. The scale of these experiments allows for 3D characterization, via serial sectioning and electron backscatter diffraction (EBSD), of tested samples through collection of critical microstructural data, including size, shape and orientation of grains and twins within the tested volume. Experimentally capturing explicit microstructures, at a scale that is also computationally tractable in crystal plasticity modeling, and their attendant mechanical behavior highlights stochastic nature of plasticity in small volumes and provides quantitative metrics for model development

Book Reviews

Reviews of the following books: Pamphlets for the People: A Review Essay on the Publications of the Maine Historic Preservation Commission; Arthur Spear, 1879-1959 by Arthur Spear, Jr.; Army Engineers in New England: The Military and Civil Works of the Corps of Engineers in New England, 1775-1975 by Aubrey Parkma

Simon the Composite Sorcerer

Simon Magus is a key figure in the earliest apocryphal Acts of Peter. He is a sorcerer and confidant of the emperor who clashes with Peter and, in later apocryphal texts, with both Peter and Paul. However, this is not simply the villain of the Acts of the Apostles. In this article I will argue that the apocryphal Simon is a composite figure drawn substantially, but not necessarily wholly, from the Simon of Acts 8 and the Elymas/Bar-Jesus figure who opposes Paul in Acts 13

Multiwavelength transit observations of the candidate disintegrating planetesimals orbiting WD 1145+017

We present multiwavelength, ground-based follow-up photometry of the white dwarf WD 1145+017, which has recently been suggested to be orbited by up to six or more short-period, low-mass, disintegrating planetesimals. We detect nine significant dips in flux of between 10% and 30% of the stellar flux in our ~32 hr of photometry, suggesting that WD 1145+017 is indeed being orbited by multiple, short-period objects. Through fits to the asymmetric transits that we observe, we confirm that the transit egress is usually longer than the ingress, and that the transit duration is longer than expected for a solid body at these short periods, all suggesting that these objects have cometary tails streaming behind them. The precise orbital periods of the planetesimals are unclear, but at least one object, and likely more, have orbital periods of ~4.5 hr. We are otherwise unable to confirm the specific periods that have been reported, bringing into question the long-term stability of these periods. Our high-precision photometry also displays low-amplitude variations, suggesting that dusty material is consistently passing in front of the white dwarf, either from discarded material from these disintegrating planetesimals or from the detected dusty debris disk. We compare the transit depths in the V- and R-bands of our multiwavelength photometry, and find no significant difference; therefore, for likely compositions, the radius of single-size particles in the cometary tails streaming behind the planetesimals must be ~0.15 μm or larger, or ~0.06 μm or smaller, with 2σ confidence

Seeing-limited Coupling of Starlight into Single-mode Fiber with a Small Telescope

An optical fiber link to a telescope provides many advantages for spectrometers designed to detect and characterize extrasolar planets through precise radial velocity (PRV) measurements. In the seeing-limited regime, a multi-mode fiber is typically used so that a significant amount of starlight may be captured. In the near-diffraction-limited case, either with an adaptive optics system or with a small telescope at an excellent site, efficiently coupling starlight into a much smaller, single-mode fiber may be possible. In general, a spectrometer designed for single-mode fiber input will be substantially less costly than one designed for multi-mode fiber input. We describe the results of tests coupling starlight from a 70 cm telescope at Mt. Hopkins, Arizona into the single-mode fiber of the MINERVA-Red spectrometer at a wavelength of ~850 nm using a low-speed tip/tilt image stabilization system comprising all commercial, off-the-shelf components. We find that approximately 0.5% of the available starlight is coupled into the single-mode fiber under seeing conditions typical for observatories hosting small telescopes, which is close to the theoretical expectation. We discuss scientific opportunities for small telescopes paired with inexpensive, high-resolution spectrometers, as well as upgrade paths that should significantly increase the coupling efficiency for the MINERVA-Red system.Comment: 8 pages, 4 figures. Accepted for publication in Astronomische Nachrichte

Federalism: Deference Meets Delegation: Which Is the Most Dangerous Branch

The following is a transcript of a 2016 Federalist Society panel entitled Federalism: Deference Meets Delegation: Which is the Most Dangerous Branch? The panel originally occurred on November 12, 2015, during the National Lawyers Convention in Washington, D.C. The panelists were: C. Boyden Gray, Attorney at Boyden, Gray and Associates and former U.S. Ambassador to the European Union; David B. Rivkin Jr., Partner at BakerHostetler; Neal K. Katyal, Attorney at Hogan Lovells and former acting U.S. Solicitor General; and John C. Eastman, Henry Salvatori Professor of Law & Community Service at Chapman University School of Law. The moderator was the Honorable Judge Brett Kavanaugh of the U.S. Court of Appeals, D.C. Circuit