University of Winnipeg

About: University of Winnipeg is a education organization based out in Winnipeg, Manitoba, Canada. It is known for research contribution in the topics: Population & Context (language use). The organization has 3235 authors who have published 6413 publications receiving 150564 citations. The organization is also known as: U of W.

Search for CP Violation in Neutrino and Antineutrino Oscillations by the T2K Experiment with 2.2×1021 Protons on Target

Abstract: The T2K experiment measures muon neutrino disappearance and electron neutrino appearance in accelerator-produced neutrino and antineutrino beams. With an exposure of $14.7(7.6)\times 10^{20}$ protons on target in neutrino (antineutrino) mode, 89 $ u_e$ candidates and 7 anti-$ u_e$ candidates were observed while 67.5 and 9.0 are expected for $\delta_{CP}=0$ and normal mass ordering. The obtained $2\sigma$ confidence interval for the $CP$ violating phase, $\delta_{CP}$, does not include the $CP$-conserving cases ($\delta_{CP}=0,\pi$). The best-fit values of other parameters are $\sin^2\theta_{23} = 0.526^{+0.032}_{-0.036}$ and $\Delta m^2_{32}=2.463\pm0.065\times10^{-3} \mathrm{eV}^2/c^4$.

Response of Forest Trees to Increased Atmospheric CO 2

Abstract: The CO 2 fertilization hypothesis stipulates that rising atmospheric CO 2 has a positive effect on tree growth due to increasing availability of carbon. The objective of this paper is to compare the recent literature related to both field CO 2 -enriched experiments with trees and empirical dendrochronological studies detecting CO 2 fertilization effects in tree-rings. This will allow evaluation of tree growth responses to atmospheric CO 2 enrichment by combining evidence from both ecophysiology and tree-ring research. Based on considerable experimental evidence of direct CO 2 fertilization effect (increased photosynthesis, water use efficiency, and above- and belowground biomass), and predications from the interactions of enriched CO 2 with temperature, nitrogen and drought, we propose that warm, moderately drought-stressed ecosystems with an ample nitrogen supply might be the most CO 2 responsive ecosystems. Empirical tree-ring studies took the following three viewpoints on detecting CO 2 fertilization e...

Self-esteem and "if…then" contingencies of interpersonal acceptance.

Abstract: The degree to which an individual perceives interpersonal acceptance as being contingent on successes and failures, versus relatively unconditional, is an important factor in the social construction of self-esteem. The authors used a lexical-decision task to examine people's "if. . . then" expectancies. On each trial, participants were shown a success or failure context word and then they made a word-nonword judgment on a second letter string, which sometimes was a target word relating to interpersonal outcomes. For low-self-esteem participants, success and failure contexts facilitated the processing of acceptance and rejection target words, respectively, revealing associations between performance and social outcomes. Study 2 ruled out a simple valence-congruency explanation. Study 3 demonstrated that the reaction-time pattern was stronger for people who had recently been primed with a highly contingent relationship, as opposed to one based more on unconditional acceptance. These results contribute to a social-cognitive formulation of the role of relational schemas in the social construction of self-esteem.

Monovacancy formation enthalpy in silicon.

Abstract: Positron-lifetime experiments have been conducted on silicon at temperatures between 300 and 1523 K. A lifetime attributable to positrons annihilating in monovacancies is directly observed above 1450 K. This lifetime has the same value as that associated with monovacancies at low temperature indicating that the character of the monovacancy is essentially independent of temperature. The results yield an activation enthalpy for neutral monovacancy formation of 3.6 \ifmmode\pm\else\textpm\fi{} 0.2 eV. No evidence for divacancy formation could be found.