Cryogenic seal remains leaktight during thermal displacement

Cryogenic seals protect the surfaces of a plastic member in a low-pressure system subjected to extreme temperature changes. The outer seal is an aluminum expansion ring bonded to the lens outer surface and the inner seal consists of a resin-filled aluminum U-ring bonded to the inner surface

Are We Asking the Right Questions? A Response to the Academic Reforms Research the NCAA

The purpose of this paper is to respond to the papers presented by Petr and McArdle (2012) and Paskus (2012). The author questions whether the appropriate issues are being addressed in broader academic reform efforts, and whether the data collected help the prime beneficiaries of intercollegiate athletics: the athletes. Questions pertaining to gender, race, and first-generation status are also posed

Narcissism and Intimate Partner Violence: An Establishment of the Link and Investigation of Multiple Potential Mediators

Intimate partner violence (IPV) involves physical, psychological, and/or emotional violence within intimate (e.g., dating) relationships. In this thesis, I examined narcissism as a predictor of IPV. I used an offensive- and defensive-trait framework to come up with 10 potential mediator variables that often typify narcissism and underlie IPV. Correlation analyses confirmed the expected link between narcissism and IPV. Subsequent bootstrapping mediation analysis of IPV-frequency revealed significant indirect effects for 2 mediators - social dominance orientation and the hostile attribution bias-based tendency to retaliate in the face of ambiguous but potentially malevolent social interactions. Bootstrapping analysis of IPV-prevalence also revealed an additional significant indirect effect for hypercompetitiveness. In both bootstrapping analyses the mediator variables only provided partial mediation of the narcissismto- IPV link. In the discussion I focus on the implications for IPV perpetration and research, including avenues for future research and potential interventions for IPV centered on mitigating narcissism

Gold - Human Serum Albumin Contrast Agents

Traditional contrast agents use inorganic compounds containing metal ions to differentiate tissue types in medical diagnostic imaging. These compounds suffer from toxicity and they do not target specific tissues. A human serum albumin and gold complex (Au@HSA) was synthesized via a biomineralization reaction to overcome these obstacles and the resulting compound was optically active, giving it potential as a contrast agent. Additionally, the Au@HSA was conjugated with the tumor targeting compound arginylglycylaspartic acid without losing its optical activity

Bell's Theorem from Moore's Theorem

It is shown that the restrictions of what can be inferred from classically-recorded observational outcomes that are imposed by the no-cloning theorem, the Kochen-Specker theorem and Bell's theorem also follow from restrictions on inferences from observations formulated within classical automata theory. Similarities between the assumptions underlying classical automata theory and those underlying universally-unitary quantum theory are discussed.Comment: 12 pages; to appear in Int. J. General System

Positioning adolescents in literacy teaching and learning

Secondary literacy instruction often happens to adolescents rather than with them. To disrupt this trend, we collaborated with 12th-grade “literacy mentors” to reimagine literacy teaching and learning with 10th-grade mentees in a public high school classroom. We used positioning theory as an analytic tool to (a) understand how mentors positioned themselves and how we positioned them and (b) examine the literacy practices that enabled and constrained the mentor position. We found that our positioning of mentors as collaborators was taken up in different and sometimes unexpected ways as a result of the multiple positions available to them and institutional-level factors that shaped what literacy practices were and were not negotiable. We argue that future collaborations with youth must account for the rights and duties of all members of a classroom community, including how those rights and duties intersect, merge, or come into conflict within and across practices.The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by a Faculty Research Award from the School of Education at Boston University. (Faculty Research Award from the School of Education at Boston University)Accepted manuscrip

Residents' annoyance responses to aircraft noise events

In a study conducted in the vicinity of Salt Lake City International Airport, community residents reported their annoyance with individual aircraft flyovers during rating sessions conducted in their homes. Annoyance ratings were obtained at different times of the day. Aircraft noise levels were measured, and other characteristics of the aircraft were noted by trained observers. Metrics commonly used for assessing aircraft noise were compared, but none performed significantly better than A-weighted sound pressure level. A significant difference was found between the ratings of commercial jet aircraft and general aviation propeller aircraft, with the latter being judged less annoying. After the effects of noise level were accounted for, no significant differences were found between the ratings of landings and takeoffs. Aircraft noise annoyance reactions are stronger in lowered ambient noise conditions. This is consistent with the theory that reduced nighttime and evening ambient levels could create different reactions at different times of day. After controlling for ambient noise in a multiple regression analysis, no significant differences were found between the ratings of single events obtained during the three time periods: morning, afternoon, and evenings