Interference Fit Fastener Inspection using Sonic Thermography

This paper reports on an experimental study addressing the application of sonic thermography to the characterisation of interference fit levels in fastened metallic plates. The technique uses high intensity acoustic waves to induce frictional heating at defect locations. In the case of poorly fitted interference fasteners, the acoustic waves induce relative motion between the fastener and host, causing frictional heating which is detected with a thermal imaging system. Results are shown to demonstrate the efficacy of the approach

Estimation of sensitivity and specificty of culture and Danish-mix ELISA for detection of Salmonella in swine using Bayesian methods

Both bacterial culture and serological assays, such as the Danish-mix ELISA for the detection of antibodies, are commonly used as tools for detecting and monitoring Salmonella in swine. The comparison and ultimate interpretation of results are made more difficult due to the absence of a gold standard

Critical review of interventions against Salmonella in the farm-to-processing pork production continuum

The purpose of this study was to identify, evaluate and summarize the available scientific literature on the effectiveness of interventions against Salmonella, in the farm-to-processing pork production continuum, following the principles of systematic review methodology

Detection and characterisation of delamination damage propagation in woven glass fibre reinforced polymer composite using thermoelastic response mapping

This paper details a study on the application of Thermoelastic Stress Analysis (TSA) for the investigation of delamination damage propagation in glass fibre reinforced composite materials. A woven Glass (0/90)/ Epoxy composite sample containing a purposely created delamination was subjected to a step-cyclic loading (varying mean level) whilst monitoring the thermoelastic response of the sample with an infrared camera. A finite element analysis (FEA) was performed using cohesive elements to simulate the propagation of the delamination under a monotonically increasing axial load. It is shown that the delamination crack length inferred from the TSA results is consistent with microscopic analysis of the sample, and that the measured crack growth rate is in reasonable agreement with simulation results

The knowledge of zoonotic diseases in swine producers, veterinarians and swine industry allied personnel in Ontario, Canada

More than 70% of swine marketed in Canada come from the Canadian Quality Assurance (QGA®) program, established in 1998 with the main purpose of demonstrating the implementation of on-farm good production practices (GPP)

Antimicrobial resistance in fecal generic Escherichia coli in 90 Alberta swine finishing farms: prevalence and risk factors for resistance

The objective of this retrospective study was to determine the prevalence of antimicrobial resistance (AMR) in generic Escherichia coli isolates obtained from 90 Alberta finisher swine farms, and to evaluate the potential associations between on-farm antimicrobial use (AMU) practices and observed AMR. The farms were visited three times, approximately one month apart (n=269 farm visits). In total, 5 pen fecal samples were collected per each visit and mixed into one pool per visit. Conventional culture and susceptibility testing were employed. Reported AMU practices through feed, water and injection in different phases of pig production, were collected using a questionnaire

Immunolocalization of an Amino-Terminal Fragment of Apolipoprotein E in the Pick\u27s Disease Brain

Although the risk factor for apolipoprotein E (apoE) polymorphism in Alzheimer\u27s disease (AD) has been well described, the role that apoE plays in other neurodegenerative diseases, including Pick\u27s disease, is not well established. To examine a possible role of apoE in Pick\u27s disease, an immunohistochemical analysis was performed utilizing a novel site-directed antibody that is specific for an amino-terminal fragment of apoE. Application of this antibody, termed the amino-terminal apoE cleavage fragment (nApoECF) antibody, consistently labeled Pick bodies within area CA1 of the hippocampus in 4 of the 5 cases examined. Co-localization of the nApoECF antibody with PHF-1, a general marker for Pick bodies, as well as with an antibody to caspase-cleaved tau (TauC3) was evident within the hippocampus. While staining of the nApoECF antibody was robust in area CA1, little co-localization with PHF-1 in Pick bodies within the dentate gyrus was observed. A quantitative analysis indicated that approximately 86% of the Pick bodies identified in area CA1 labeled with the nApoECF antibody. The presence of truncated apoE within Pick bodies suggests a broader role of apoE beyond AD and raises the question as to whether this protein contributes to pathogenesis associated with Pick\u27s disease

Gathering evidence- availability of published information to support zoonotic pathogen prioritization in swine within the Canadian context

Efforts to implement control programs for zoonotic pathogens at the farm level are ongoing. However, establishing control programs for pathogens that may derive from multiple food-animal sources and for which there are interventions at various levels of the food chain can be challenging. Prioritizing pathogens for control programs should be based on scientific evidence and transparent decision-making processes. As part of a larger project applying multi-criteria decision analysis for prioritizing pathogens, a systematic review of the literature is being conducted with initial focus on existing published research on the prevalence of 15 zoonotic pathogens in swine populations and in humans, as attributable to swine and pork, within the North American context

Distribution of Salmonella serovars in various pig production categories and risk factors for shedding in ten farrow-to-finish swine farms in western Canada.

In this study, Salmonella prevalence, serovar distribution and risk factors for shedding were investigated in breeding, nursery, and grow-finish pigs on 10 farms in western Canada, purposely selected based on their anticipated Salmonella-status. Overall, 40711143 (36%) of samples were Salmonella positive; within-farm prevalence ranged from 1% to 79%. Sows, nursery and grow-finish pigs accounted for 43%, 29% and 28% of positive samples, respectively. More Salmonella were detected in pooled pen than individual pig samples (P\u3c0.001). The most common serovars were S. Derby, S. Typhimurium, var. Copenhagen, S. Pullen, S. Infantis, and S. Mbandaka. Sows shed more Salmonella than nursery or grow-finisher pigs (OR 2.9, P\u3c0.001). Pelleted feed (OR 8.2, P\u3c0.001) and nose-to-nose pig contact through pens (OR 2.2, P=0.005) were associated with increased Salmonella prevalence. Significant differences in serovar distribution were detected among production phases