Saint Mary's University

About: Saint Mary's University is a education organization based out in Halifax, Nova Scotia, Canada. It is known for research contribution in the topics: Population & Stars. The organization has 1931 authors who have published 4993 publications receiving 143226 citations.

The Incompatible Element Characteristics of an Ancient Subducted Sedimentary Component in Ocean Island Basalts from French Polynesia

Abstract: marized by Woodhouse & Dziewonski, 1984; Castillo,1988; Zhang & Tanimoto, 1992; Nataf & VanDecar,1993; White & Duncan, 1996). The isotopic char-acteristics of the end-member mantle components areproposed to be derived by (1) ancient subduction ofoceanic crust, (2) delamination and subsequent sinkingof subcontinental lithosphere deep into the mantle, or (3)

Price fencing in the practice of revenue management: An overview and taxonomy

Abstract: Market segmentation is a key strategic element in the practice of revenue management (RM). After being identified, market segments should be kept separate to prevent demand spillover from high priced segments to low priced segments and the associated revenue loss. Tools to restrict customer migration across segments are referred to as ‘fences’. This paper represents one of the initial efforts to organise the characteristics of fences and to extend the research to more general RM settings. We first present a general picture of fencing in the world of RM and discuss business issues related to the segmentation process, segmentation enforcement and the implementation of fencing in RM. Next, we provide a survey of segmentation variables and use them to develop the discussion of the corresponding fences in the practice of RM. We categorise fences based on purchase patterns, product characteristics and customer characteristics, and lay out a taxonomy, and provide examples using the taxonomy. We suggest that management can look at their particular business situation and decide whether or not fencing is applicable. If fencing is essential, the manager must consider each of the elements listed in the taxonomy and then decide which descriptor best fits the situation. The next step is to choose the optimal fencing decisions (that is, price, inventory and cost devoted to fences) and apply them to the situation in order to improve the firm's financial results.

Thermal Conductivity of Standard Sands. Part III. Full Range of Saturation

Abstract: The thermal conductivity $$(\lambda )$$ of three unsaturated standard quartz sands (Ottawa C-109 and C-190, and Toyoura) was measured by a transient thermal-conductivity probe, at room temperature of approximately $$25\,^{\circ }\text{ C }$$ and at loose and tight compactions. The measurements were carried out at different degrees of saturation $$(S_\mathrm{r})$$ from dryness to full saturation. In general, a sharp $$\lambda $$ increase was observed at low $$S_\mathrm{r}$$ , followed by a moderate rise until full saturation. However, experiments on loosely compacted C-190 samples revealed $$\lambda $$ deviation from a general trend ( $$\lambda $$ vs $$S_\mathrm{r})$$ caused by water percolation. Alternatively, successful experiments were carried out on loosely packed unsaturated C-190 samples using 1 % agar gel. For loosely compacted C-109 and Toyoura, $$\lambda $$ data obtained from 1 % agar gel closely agreed with $$\lambda $$ data for water as a saturation medium. The measured data were used to verify a model by de Vries for unsaturated soils. The model largely underestimates experimental data at $$S_\mathrm{r}<0.5$$ and produces an overall root-mean-square error of about $$0.2\, \text{ W }~{\cdot }~\text{ m }^{-1}~{\cdot }~\text{ K }^{-1}$$ . Measured $$\lambda $$ data agreed with data by a steady-state technique (a guarded hot-plate apparatus) at dryness and full saturation and exceeded the steady-state data in the unsaturated region. However, TCP data can be considered more reliable due to a lower temperature increase during $$\lambda $$ measurements and a shorter testing time. Consequently, in the case of unsaturated soils, evaporation and migration of water and steam can be avoided.

Public education: its effect on entrepreneurial characteristics

Abstract: This paper examines the nature of the public education system and its impact on the personalities of students. The typical product of the public system is compared with the archetypal entrepreneur and it is found that schooling is antithetical to entrepreneurship. Finally, the need for remediation at the tertiary education level is established.

A spectroscopic measurement of galaxy formation time-scales with the Redshift One LDSS3 Emission line Survey

Abstract: We present measurements of the specific star formation rate (SSFR)–stellar mass relation for star-forming galaxies. Our deep spectroscopic samples are based on the Redshift One LDSS3 Emission line Survey (ROLES) and European Southern Observatory (ESO) public spectroscopy at z = 1, and on the Sloan Digital Sky Survey (SDSS) at z = 0.1. These data sets cover an equally deep mass range of 8.5 log(M∗/M� ) 11 at both epochs. We find that the SSFR–mass relation evolves in a way which is remarkably independent of stellar mass, as we previously found for the SFR density (SFRD)–mass relation. However, we see a subtle upturn in SSFR–mass for the lowest mass galaxies (which may at least partly be driven by mass-incompleteness in the K-selected sample). This upturn is suggestive of greater evolution for lower mass galaxies, which may be explained by less massive galaxies forming their stars later and on longer time-scales than higher mass galaxies, as implied by the ‘cosmic downsizing’ scenario. Parametrizing the e-folding time-scale and formation redshift as simple functions of baryonic mass gives best-fitting parametrizations of τ (Mb) ∝ M −1.01 b and 1 + zf(Mb) ∝ M 0.30 b . This subtle upturn is also seen in the SFRD as a function of stellar mass. At higher masses, such as those probed by previous surveys, the evolution in SSFR–mass is almost independent of stellar mass. At higher masses [log(M∗/M� ) > 10] the shapes of the cumulative cosmic SFRDs are very similar at both z = 0.1 and 1.0, both showing 70 per cent of the total SFRD above a mass of log(M∗/M� ) > 10. Mass functions are constructed for star-forming galaxies and found to evolve by only <35 per cent between z = 1 and 0.1 over the whole mass range. The evolution is such that the mass function decreases with increasing cosmic time, confirming that galaxies are leaving the star-forming sequence/blue cloud. The observational results are extended to z ∼ 2 by adding two recent Lyman break galaxy samples, and data at these three epochs (z = 0.1, 1, 2) are compared with the GALFORM semi-analytic model of galaxy formation. GALFORM predicts an overall SFRD as a function of stellar mass in reasonable agreement with the observations. The star formation time-scales inferred from 1/SSFR also give reasonable overall agreement, with the agreement becoming worse at the lowest and highest masses. The models do not reproduce the SSFR upturn seen in our data at low masses, where the effects of extinction and active galactic nuclei feedback should be minimal and the comparison should be most robust.