Crotalus ruber

Number of Pages: 17Integrative BiologyGeological Science

Gambelia copeii

Number of Pages: 8Integrative BiologyGeological Science

A new approach to the assessment of odour nuisance

After reviewing the current situation with regard to the assessment of odour nuisance, the development of a new approach is presented. Descriptions are given of the new techniques, which have been developed for quantifying odour intensity, concentration, hedonic tone and annoyance. Statistical analyses of laboratory and field test data collected using these techniques provided mathematical relationships 1 for the assembly of the odour nuisance assessment model. .The nuisance criteria adopted was derived from various guidelines and standards from the U.S. and Europe. For completeness an atmospheric dispersion model was developed for estimating the behaviour of odours downwind of the source. This made it possible to assess the probability of an odour nuisance occurring, using any one of a number of different points of knowledge, e.g. existing or future situations. The assessment method has been tested against independent historical data and been demonstrated to be an effective tool in predicting odour nuisance with a consistency better than any existing method. A listing is provided for a computer program to enable the user to apply the model both quickly and effectively

The Effects of grouping and curriculum on the self-concept of gifted children

The Big-Fish-Little-Pond Effect predicts gifted students educated in heterogeneous settings develop higher academic self-concept than those educated in homogeneous settings. Academic self-concept of students in multi-age classroom using the Primary Years International Baccalaureate Program (Primary IB) was compared to academic self-concept of students in single-aged classroom learning traditional curriculum. Data were collected (N=65) on third and fourth-graders using the Self-Description Questionaire (Marsh, 1992). It was hypothesized that gifted and non-gifted students educated in multi-age classrooms taught with Primary IB have higher academic self-concept than children in single age classrooms. Results of 2x2 ANOVA indicated no significant differences between gifted and non-gifted students in these settings. In this study, academic grouping and curriculum have no significant effect on student\u27s academic self-concept

Fast and frugal framing effects?

Three experiments examine whether simple pair-wise comparison judgments, involving the “recognition heuristic” (Goldstein & Gigerenzer, 2002), are sensitive to implicit cues to the nature of the comparison required. Experiments 1 & 2 show that participants frequently choose the recognized option of a pair if asked to make “larger” judgments but are significantly less likely to choose the unrecognized option when asked to make “smaller” judgments. Experiment 3 demonstrates that, overall, participants consider recognition to be a more reliable guide to judgments of a magnitude criterion than lack of recognition and that this intuition drives the framing effect. These results support the idea that, when making pair-wise comparison judgments, inferring that the recognized item is large is simpler than inferring that the unrecognized item is small

Chionactis occipitalis

Number of Pages: 12Integrative BiologyGeological Science

The Morphology of the Tasmantid Seamounts: Interactions Between Tectonic Inheritance and Magmatic Evolution

No abstract available

Chionactis palarostris

Number of Pages: 5Integrative BiologyGeological Science

A revised Latest Cretaceous and Early Cenozoic apparent polar wander path for the Pacific plate

The apparent polar wander path (APWP) for the Pacific plate during the Late Cretaceous and Early Cenozoic has been constrained primarily by seamount magnetic anomaly inversions and seafloor magnetic anomaly skewness. The reliability of these data types is uncertain and data are too sparse to provide a consistent or detailed APWP. In an effort to refine the Pacific APWP, we collected a larger, more diverse data set that allowed for the calculation of new mean paleomagnetic poles for the latest Cretaceous and Paleogene. We combined four types of data including sediment core paleocolatitudes, basalt core paleocolatitudes, seamount magnetic anomaly inversion declinations, and effective inclinations from magnetic anomaly skewness calculations. This diverse data set yields paleomagnetic poles that are less affected by bias from any particular data type. We found reasonably good agreement between data types and calculated five mean paleomagnetic poles representing the Oligocene (30 Ma), Late (39 Ma) and Early (49 Ma) Eocene, and Paleocene (61 Ma) epochs and the Maastrichtian (68 Ma) stage. Though a significant percentage of the data are from azimuthallyunoriented cores, which do not provide constraint on paleodeclination, a wide distribution of sites and the use of declination data from seamount anomaly inversions gave relatively good control on pole paleolongitude. The large numbers of data in our calculations allow for reasonably compact uncertainty bounds and the overall agreement among most data implies insignificant systematic errors in the data set. The greatest disagreement among data occurs due to a divergence between poles from anomaly skewness and other data types prior to 55 Ma. As a whole, the new APWP implies northward Pacific plate drift. However, this motion is punctuated with a stillstand from the Late Cretaceous (~80 Ma) until the middle Eocene, (~49 Ma). This stillstand suggests a lack of northward Pacific plate motion during this time, counter to most accepted models. This APWP is consistent with paleomagnetic results from the Emperor Chain that indicate the Hawaiian hotspot moved south during formation of the Emperor Chain, but it implies an amount of motion slightly greater than that previously proposed for hotspot drift

Surface Characterization of Laser Polished Indirect-SLS Parts

Surface analysis was performed on laser polished indirect-SLS samples made from 420 stainless steel sintered powder - bronze infiltrated. The goal was to determine variations from the as-received condition in surface chemical composition, morphological structure, presence of contaminants as well as the formation of new phases. Comprehensive characterization of the laser polished surfaces was performed using scanning electron microscopy (SEM), energy dispersive spectrochemical analysis (EDS), x-ray diffraction analysis (XRD) and Vickers hardness. A large quantity of carbon (i.e. > 29 wt%) was present on the as-received surface mostly from the polymer binder present in the green part. Although surface-shallow-melting is the principal mechanism for the roughness reduction of the as-received surface, the chemical composition of the latter after processing changed to a higher carbon and oxygen content and a lower copper content. Additionally, clusters were formed periodically over the polished surface consisting of Fe, Cr, Si and Al oxides. The surface analysis demonstrated that the laser polished surfaces differ significantly more from a morphological rather than a microstructural perspective.Mechanical Engineerin