Variations in the Skull of the Bearded Seal

Fourteen measurements taken on 260 skulls are described and analysed using variance, covariance, reduced major axes, and discriminant functions. No sexual variation is found. Changes in relative growth with age are demonstrated and discussed. Skulls from the Atlantic adult population are shown to be significantly larger than those from the Pacific in most dimensions. An important exception, nasal breadth, is significantly smaller. Differences in the regression coefficients between the Atlantic and Pacific populations are probably not significant, but some differences in position of the regression lines are highly significant. The results are compared with those of some previous authors and the boundaries between the populations considered. The recognition of E. b. nauticus for the Pacific population is justified

Thoriated nickel bonded by solid-state diffusion method

Solid-state diffusion bonding in an inert-gas atmosphere forms high-strength joints between butting or overlapping surfaces of thoriated nickel. This method eliminates inert-phase agglomeration

Glass bead shot peening retards stress corrosion failure of titanium tanks

Rigidly controlled shot peening retards the incompatibility between titanium alloys and nitrogen tetroxide in rocket-propellant storage tanks. This sets up a residual compressive stress in the surface of a material which reduces tensile stresses in the material fibers, alleviating stress corrosion

SNAP-8 post shutdown gamma radiation approximations

Detector responses were calculated for normalized sources in the Perkins and King energy group structure for a SNAP 8 power system on a NASA space station. Gamma decay rates were then calculated by using an expanded, updated list of isotopic decay data, and from these, actual detector responses were found for the SNAP 8 system. The results indicate that energy-dependent calculations must be made to determine decay gamma dose rates for actual reactor configurations. A simplified method for making these calculations has been devised

Efficient AUC Optimization for Information Ranking Applications

Adequate evaluation of an information retrieval system to estimate future performance is a crucial task. Area under the ROC curve (AUC) is widely used to evaluate the generalization of a retrieval system. However, the objective function optimized in many retrieval systems is the error rate and not the AUC value. This paper provides an efficient and effective non-linear approach to optimize AUC using additive regression trees, with a special emphasis on the use of multi-class AUC (MAUC) because multiple relevance levels are widely used in many ranking applications. Compared to a conventional linear approach, the performance of the non-linear approach is comparable on binary-relevance benchmark datasets and is better on multi-relevance benchmark datasets.Comment: 12 page

Controlled glass bead peening Patent

Method and apparatus for inducing compressive stresses in pressure vessel to prevent stress corrosio

Shock transmission in coupled beams and rib stiffened structures

Shock transmission in a simple coupled beam structure and in a ring-stringer stiffened cylinder is investigated experimentally and analytically using wave transmission and statistical energy analysis concepts. The use of the response spectrum to characterize the excitation provided to a simple beam by a force pulse is studied. Analysis of the transmission of a dilatation wave in a periodically stiffened plate indicates that the stiffeners are fairly transparent to the wave, but some of the dilatational energy is scattered into bending at each support

Gardner-Webb, The Magazine 2022, Fall (Volume 57)

Gardner-Webb, The Magazine, previously titled The Webb Magazine, focuses on alumni news and campus events from Gardner-Webb College; now Gardner-Webb University. This issue includes articles on the launch of the new Bulldog brand, new provost Dr Aubrey, new VP for Athletics Dr. Goodrich, and record setting golfer Zach Byers.https://digitalcommons.gardner-webb.edu/gwmagazine/1028/thumbnail.jp

Predictors of Outcome of Surgery for Carpal Tunnel Syndrome

Wrist surgery is a common method for treating carpal tunnel syndrome (CTS) although few studies have examined patient outcomes or predictive correlates of such procedures. The objectives of this study were to characterize Utah workers who received surgery for CTS in terms of relevant presurgical and outcome variables and to identify presurgical correlates of patient outcomes. Participants were 75 Utah workers\u27 compensation patients who underwent surgery for CTS from 1999-2002 and were at least 6 months postsurgery at time of follow-up. A retrospective cohort design was utilized consisting of a review of presurgical medical records and a postsurgical telephone survey. Presurgical variables included: gender, age, history of depression, and litigation status. Correlational analyses revealed that age and lawyer involvement were consistent significant predictors of poorer outcomes. The importance of conceptualizing CTS surgery patient outcomes from a biopsychosocial perspective is discussed