3,677 research outputs found
Breaking into BIM physical security simulation utilising building information models
Unlike traditional modelling, Building Information Models (BIMs) are a developing standard which has the capacity to support various value add opportunities like utility and environmental simulations. We will demonstrate a system that utilises BIMs to generate an edge and node graph. This graph will utilise knowledge from the physical security domain to highlight weaknesses in a facilities design. We intend for this system to aid designers from an early stage, allowing for a more accessible application of security knowledge
Reducing Computational Fluid Dynamics Simulation Cost by Intelligently Reducing Geometric Complexity
Computational Fluid Dynamic (CFD) Simulations enable a wide range of analysis but are costly to perform. This research looks at taking existing geometry from Building Information Models or CAD, and performing Geometric Abstraction to make them ready for simulation quickly, as well as reducing the computational cost to simulate them. The aim is to make CFD more accessible, so it can be applied more readily to existing and new problems
Amino acid changes in the spike protein of feline coronavirus correlate with systemic spread of virus from the intestine and not with feline infectious peritonitis
Recent evidence suggests that a mutation in the spike protein gene of feline coronavirus (FCoV), which results in an amino acid change from methionine to leucine at position 1058, may be associated with feline infectious peritonitis (FIP). Tissue and faecal samples collected post mortem from cats diagnosed with or without FIP were subjected to RNA extraction and quantitative reverse-transcriptase polymerase chain reaction (qRT-PCR) to detect FCoV RNA. In cats with FIP, 95% of tissue, and 81% of faecal samples were PCR-positive, as opposed to 22% of tissue, and 60% of faecal samples in cats without FIP. Relative FCoV copy numbers were significantly higher in the cats with FIP, both in tissues (P < 0.001) and faeces (P = 0.02). PCR-positive samples underwent pyrosequencing encompassing position 1058 of the FCoV spike protein. This identified a methionine codon at position 1058, consistent with the shedding of an enteric form of FCoV, in 77% of the faecal samples from cats with FIP, and in 100% of the samples from cats without FIP. In contrast, 91% of the tissue samples from cats with FIP and 89% from cats without FIP had a leucine codon at position 1058, consistent with a systemic form of FCoV. These results suggest that the methionine to leucine substitution at position 1058 in the FCoV spike protein is indicative of systemic spread of FCoV from the intestine, rather than a virus with the potential to cause FIP
Enhanced Reputation Scoring for Online Auctions
To handle the uncertainty inherent in eCommerce transactions, reputation systems have emerged as a way to represent reliability and develop trust between transaction participants. Despite the value added by reputation systems, limitations of existent systems remain (Malaga 2001). We empirically test Porter et al.ās (2004) reputation scoring procedure, which was designed to address the shortcomings of current systems. This study uses computer simulation to replicate the auction process between buyers and sellers with reputation scores calculated using both the Porter et al. model and the eBay auction model. Results from the two models are then analyzed to show that the Porter et al. model more accurately estimates reputation scores
Inflammatory bowel disease-associated colorectal cancer: translational risks from mechanisms to medicines
The cumulative impact of chronic inflammation in patients with inflammatory bowel diseases predisposes to the development of inflammatory bowel disease-associated colorectal cancer [IBD-CRC]. Inflammation can induce mutagenesis, and the relapsingāremitting nature of this inflammation, together with epithelial regeneration, may exert selective pressure accelerating carcinogenesis. The molecular pathogenesis of IBD-CRC, termed the āinflammationādysplasiaācarcinomaā sequence, is well described. However, the immunopathogenesis of IBD-CRC is less well understood. The impact of novel immunosuppressive therapies, which aim to achieve deep remission, is mostly unknown. Therefore, this timely review summarizes the clinical context of IBD-CRC, outlines the molecular and immunological basis of disease pathogenesis, and considers the impact of novel biological therapies
Synchrotron x-ray scattering of magnetic and electronic structure of UN and U2N3 epitaxial films
We examine the magnetic ordering of UN and of a closely related nitride,
U2N3, by preparing thin epitaxial films and using synchrotron x-ray techniques.
The magnetic configuration and subsequent coupling to the lattice are key
features of the electronic structure. The well-known antiferromagnetic (AF)
ordering of UN is confirmed, but the expected accompanying distortion at Tn is
not observed. Instead, we propose that the strong magneto-elastic interaction
at low temperature involves changes in the strain of the material. These
strains vary as a function of the sample form. As a consequence, the accepted
AF configuration of UN may be incorrect. In the case of cubic a-U2N3, no single
crystals have been previously prepared, and we have determined the AF ordering
wave-vector. The AF Tn is close to that previously reported. In addition,
resonant diffraction methods have identified an aspherical quadrupolar charge
contribution in U2N3 involving the 5f electrons; the first time this has been
observed in an actinide compound
Immediate-release granule formulation of hydrocortisone, AlkindiĀ®, for treatment of paediatric adrenal insufficiency (Infacort development programme)
INTRODUCTION: Treatment of paediatric patients with adrenal insufficiency is challenging due to the lack of appropriate glucocorticoid preparations for children, and the use of either pharmacy- or parent-compounded hydrocortisone tablets. Alkindi (hydrocortisone granules in capsules for opening) is a new therapeutic option for paediatric adrenal insufficiency. Areas Covered: Drawbacks of current therapy and formulation and clinical trial programme for Alkindi. Expert Commentary: Compounding hydrocortisone has multiple issues including inconsistent dosing with under and over treatment and practical problems for parents who compound the drug themselves or travel long distances to a compounding pharmacy and the cost of compounding by the pharmacy. AlkindiĀ® is a novel paediatric formulation of immediate release hydrocortisone licensed for use in paediatric adrenal insufficiency. AlkindiĀ® is formulated to address the needs of neonates, infants and young children, being available at appropriate paediatric doses of 0.5, 1.0, 2.0 and 5.0Ā mg, is multiparticulate, allowing either direct oral dosing or dosing mixed with food, is taste masked to obscure the bitter taste of hydrocortisone and is bioequivalent to current hydrocortisone preparations. Clinical trials in young children with adrenal insufficiency demonstrated cortisol levels after dosing similar to those seen in healthy children and the drug was well tolerated and favoured over current therapy by parents. AlkindiĀ® will provide a licenced treatment option for accurate dosing in children with adrenal insufficiency where compounded adult tablets of hydrocortisone are unsuitable
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