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.

From Cloud to Fog Computing: A Review and a Conceptual Live VM Migration Framework

Abstract: Fog computing, an extension of cloud computing services to the edge of the network to decrease latency and network congestion, is a relatively recent research trend. Although both cloud and fog offer similar resources and services, the latter is characterized by low latency with a wider spread and geographically distributed nodes to support mobility and real-time interaction. In this paper, we describe the fog computing architecture and review its different services and applications. We then discuss security and privacy issues in fog computing, focusing on service and resource availability. Virtualization is a vital technology in both fog and cloud computing that enables virtual machines (VMs) to coexist in a physical server (host) to share resources. These VMs could be subject to malicious attacks or the physical server hosting it could experience system failure, both of which result in unavailability of services and resources. Therefore, a conceptual smart pre-copy live migration approach is presented for VM migration. Using this approach, we can estimate the downtime after each iteration to determine whether to proceed to the stop-and-copy stage during a system failure or an attack on a fog computing node. This will minimize both the downtime and the migration time to guarantee resource and service availability to the end users of fog computing. Last, future research directions are outlined.

From Nothing Works to What Works: Changing Professional Ideology in the 21st Century:

Abstract: The authors explore changes over time in criminologists' “professional ideology”—a core set of underlying beliefs that focuses academic thinking along certain lines but not others. Until the late 1960s, criminologists believed that the scientific study of the causes of crime would form the basis of individualized treatments that would reduce offender recidivism. By the mid-1970s, this view had collapsed and had been replaced by a professional ideology emphasizing that “nothing works” in corrections, that the causes of criminality are structural, and that crime can only be reduced through social justice. Although not without its merits, the authors suggest that this professional ideology has had the unfortunate consequence of legitimating “knowledge destruction” (showing what does not work) as the core intellectual project of criminology and thus of undermining efforts at “knowledge construction” (showing what does work). A “what works” movement within corrections, however, is advancing an alternative prof...

Socio‐economic Status and Academic Achievement Trajectories from Childhood to Adolescence

Abstract: Although a positive relationship between socio‐economic status and academic achievement is well‐established, how it varies with age is not. This article uses four data points from Canada’s National Longitudinal Study of Children and Youth (NLSCY) to examine how the academic achievement gap attributed to SES changes from childhood to adolescence (ages 7 to 15). Estimates of panel data and hierarchical linear models indicate that the gap remains fairly stable from the age of 7 to 11 years and widens at an increasing rate from the age of 11 to the age of 15 years. Theoretical arguments and policy implications surrounding this finding are discussed. Key words: SES, academic achievement, early adolescence, growth model Bien qu’on sache depuis longtemps qu’il existe un lien entre le statut socioeconomique et le rendement scolaire, il reste encore a determiner dans quelle mesure ce lien varie en fonc‐ tion de l’âge. Cet article a recours a quatre points de donnees tires de l’Enquete longitudi‐ nale nationale sur les enfants et les jeunes (ELNEJ) du Canada en vue de mesurer comment les differences dans le rendement scolaire attribuees au statut socioeconomique changent de l’enfance a l’adolescence (de 7 a 15 ans). Des estimations tirees de donnees recueillies au moyen d’un panel ainsi que des modeles hierarchiques lineaires indiquent que les diffe‐ rences demeurent relativement stables entre 7 ans et 11 ans et deviennent de plus en plus marquees entre 11 ans et 15 ans. Les auteurs font l’analyse des arguments theoriques et des incidences sur les politiques entourant cette conclusion. Mots cles : statut socioeconomique, rendement scolaire, debut de l’adolescence, modele de croissance.

Jute as raw material for the preparation of microcrystalline cellulose

Abstract: Cellulose was extracted at a yield of 59.8% from jute fibres based on the formic acid/peroxyformic acid process at an atmospheric pressure. The amounts of dissolved lignin and hemicelluloses were determined in the spent liquor. The results showed that the spent liquor contained 10.6% total sugars and 10.9% lignin (based on jute). Microcrystalline cellulose (MCC) was further prepared from the jute cellulose based on the acid hydrolysis technique. A very high yield, 48–52.8% (based on the jute raw material) was obtained. The acid hydrolysate of cellulose contained 2.7% glucose and 0.2% xylose. The MCC samples obtained from two different conditions, one at a low acidity and the other at a high acidity, were characterized by means of Thermo Gravimetric Analysis, Fourier Transform Infrared, X-ray detraction, Scanning Electron Micrograph, and Transmission Electron Micrograph techniques.