Superposition Formulas for Darboux Integrable Exterior Differential Systems

In this paper we present a far-reaching generalization of E. Vessiot's analysis of the Darboux integrable partial differential equations in one dependent and two independent variables. Our approach provides new insights into this classical method, uncovers the fundamental geometric invariants of Darboux integrable systems, and provides for systematic, algorithmic integration of such systems. This work is formulated within the general framework of Pfaffian exterior differential systems and, as such, has applications well beyond those currently found in the literature. In particular, our integration method is applicable to systems of hyperbolic PDE such as the Toda lattice equations, 2 dimensional wave maps and systems of overdetermined PDE.Comment: 80 page report. Updated version with some new sections, and major improvements to other

Memory for a Familiar and Unfamiliar University Logo

Prior research found that memory is fallible and that memory for common objects is poorly encoded (Brady et al., 2008; Nickerson & Adams, 1979). Participants studied one of the logos and recalled both the familiar and unfamiliar logos. Confidence judgments were collected at pre- and post-recall for both logos. Results suggest that recall changed by study condition and logo type, studying before recall, for both the familiar and the unfamiliar logo, improved recall scores. The results also suggest that confidence judgments changed depending on the logo familiarity and time. Confidence decreased from pre- to post-recall for the familiar logo in both study conditions but increased for the unfamiliar logo in both study conditions. Prior research on schema memory and metamemory may explain why there is a difference in direction for the two logos. Schema incongruent items have better contextual memory and higher confidence (Sweegers et al., 2015)

Application of accelerated heteronuclear single quantum coherence experiments to the rapid quantification of monosaccharides and disaccharides in dairy products

Monosaccharides and disaccharides are important dietary components, but if insufficiently metabolized by some population subgroups, they are also linked to disease patterns. Thus, the correct analytical identification, quantification, and labeling of these food components are crucial to inform and potentially protect consumers. Enzymatic assays and high-performance anion-exchange chromatography with pulsed amperometric detection are established methods for the quantification of monosaccharides and disaccharides that, however, require long measuring times (60–180 min). Accelerated methods for the identification and quantification of the nutritionally relevant monosaccharides and disaccharides d-glucose, d-galactose, d-fructose, sucrose, lactose, and maltose were therefore developed. To realize this goal, the NMR experiments HSQC (heteronuclear single quantum coherence) and acceleration by sharing adjacent polarization (ASAP)-HSQC were applied. Measurement times were reduced to 27 and 6 min, respectively, by optimizing the interscan delay and applying non-uniform sampling. The optimized methods were used to quantify d-glucose, d-galactose, d-fructose, sucrose, and lactose in various dairy products. Results of the HSQC and ASAP-HSQC methods are equivalent to the results of the reference methods in terms of both precision and accuracy, demonstrating that these methods can be used to correctly analyze nutritionally relevant monosaccharides and disaccharides in short times

Suburb-to-suburb intercity travel: Energy, time and dollar expenditures

The effect of adding suburb to terminal and terminal to suburb travel is examined. The energy consumed in entire trips was estimated. The total energy costs are compared with total travel times, and dollar costs to the traveler. Trips between origins in seven suburbs of Newark, New Jersey and destinations in two Washington, D. C. suburbs are analyzed

An Artistic Contemplative Inquiry: What arrives in co-contemplating assessment and evaluation

Contemporary arts-based inquiry invites us to linger in moments, to reflect upon our lives, our encounters, our relationships within the grander context of the worlds within which we dwell and those that we co-create. Here, we explore the landscape of the arts in relation to assessment and evaluation. Through a collaborative artistic contemplative inquiry, an emergent dialogue exploring assessment and evaluation is recorded and presented as a found poem, “What Arrives.” Our hope, when we embarked upon this artistic contemplation, was that we would evoke, provoke, and interrupt each other for the purpose of creating possibilities of alliance and (re)cognition when thinking about the arts, assessment, and evaluation