University of New Brunswick

About: University of New Brunswick is a education organization based out in Fredericton, New Brunswick, Canada. It is known for research contribution in the topics: Population & Context (language use). The organization has 10498 authors who have published 20654 publications receiving 474448 citations.

Contributions of Education for Sustainable Development (ESD) to Quality Education: A Synthesis of Research.

Abstract: This research is a synthesis of studies carried out in 18 countries to identify contributions of education for sustainable development (ESD) to quality education. Five common questions were used fo...

Sodium periodate oxidation of cellulose nanocrystal and its application as a paper wet strength additive

Abstract: The oxidation of cellulose nanocrystal (CNC) by sodium periodate can generate aldehyde functions for crosslinking reactions or for further modification, which can extend the range of applications of CNC In this paper, the effects of reaction conditions during the periodate oxidation of CNC, such as oxidant concentration, pH, temperature and oxidation time on the oxidized CNC yield and the aldehyde content, were investigated and an optimized reaction condition was identified The generation of aldehyde groups on the CNC was confirmed by Fourier transform infrared spectroscopy analysis, and the decreased crystalline index was observed by X-ray diffraction The transmission electron microscope observation showed the morphological changes of CNC after the oxidation The oxidized CNC was used as a strength additive to paper, and the results showed that the dry tensile index was 326 % higher than the control sample, and the wet tensile index was reached to 308 Nm/g, at the oxidized CNC dosage of 12 %

NC end milling optimization using evolutionary computation

Abstract: Typically, NC programmers generate tool paths for end milling using a computer-aided process planner but manually schedule “conservative” cutting conditions. In this paper, a new evolutionary computation technique, particle swarm optimization (PSO), is proposed and implemented to efficiently and robustly optimize multiple machining parameters simultaneously for the case of milling. An artificial neural networks (ANN) predictive model for critical process parameters is used to predict the cutting forces which in turn are used by the PSO developed algorithm to optimize the cutting conditions subject to a comprehensive set of constraints. Next, the algorithm is used to optimize both feed and speed for a typical case found in industry, namely, pocket-milling. Machining time reductions of up to 35% are observed. In addition, the new technique is found to be efficient and robust.

Dyadic assessment of sexual self-disclosure and sexual satisfaction in heterosexual dating couples:

Abstract: We examined two proposed pathways between sexual self-disclosure and sexual satisfaction. According to the proposed expressive pathway, reciprocal sexual self-disclosure contributes to relationship satisfaction, which in turn leads to greater sexual satisfaction. According to the instrumental pathway, own sexual self-disclosure leads to greater partner understanding of sexual likes and dislikes, which in turn leads to a more favorable balance of sexual rewards and costs and thus to higher sexual satisfaction. Seventy-four heterosexual dating couples completed questionnaires assessing self-disclosure, sexual and relationship satisfaction, as well as own and partner positive and negative sexual exchanges. Support was found for the instrumental pathway for both women and men and for the expressive pathway for women. For men, the expressive pathway was between own nonsexual self-disclosure and sexual satisfaction. These results are interpreted in light of the more instrumental role for men in sexual relations...

Molecular Design of UV–vis Absorption and Emission Properties in Organic Fluorophores: Toward Larger Bathochromic Shifts, Enhanced Molar Extinction Coefficients, and Greater Stokes Shifts

Abstract: Understanding the molecular origins of the optoelectronic properties of fluorophores provides rational guidelines for chemists to synthesize better-performing dyes. Factors affecting the UV–vis absorption spectral shift, molar extinction coefficients, and Stokes shift of fluorophores are herein examined at the molecular level, via both (time-dependent) density functional theory-based calculations and the empirical harmonic-oscillator-stabilization-energy (HOSE) and bond-length-alternation (BLA) models. The importance of these factors is discussed using six coumarin dyes as exemplars. In particular, a special focus is devoted to the Stokes shift, a critical parameter in fluorophores. It is demonstrated that incorporating a “rotational” substituent in a fluorophore molecule with tailored steric hindrance effects and resonance effects leads to a substantial increase in the Stokes shift, not only in coumarins but also in other chemical dye families: boron-dipyrromethenes (BODIPYs), cyanines, and stilbenes. St...