15 research outputs found
A millimeter-wave kinetic inductance detector camera for long-range imaging through optical obscurants
Millimeter-wave imaging provides a promising option for long-range target detection through optical obscurants such as fog, which often occur in marine environments. Given this motivation, we are currently developing a 150 GHz polarization-sensitive imager using a relatively new type of superconducting pair-breaking detector, the kinetic inductance detector (KID). This imager will be paired with a 1.5 m telescope to obtain an angular resolution of 0.09° over a 3.5° field of view using 3,840 KIDs. We have fully characterized a prototype KID array, which shows excellent performance with noise strongly limited by the irreducible fluctuations from the ambient temperature background. Full-scale KID arrays are now being fabricated and characterized for a planned demonstration in a maritime environment later this year
Atrioventricular conduction in patients undergoing pacemaker implant following selfâexpandable transcatheter aortic valve replacement
BackgroundHeart block requiring a pacemaker is common after selfâexpandable transcatheter aortic valve replacement (SEâTAVR); however, conduction abnormalities may improve over time. Optimal device management in these patients is unknown.ObjectiveTo evaluate the longâterm, natural history of conduction disturbances in patients undergoing pacemaker implantation following SEâTAVR.MethodsAll patients who underwent new cardiac implantable electronic device (CIED) implantation at Michigan Medicine following SEâTAVR placement between January 1, 2012 and September 25, 2017 were identified. Electrocardiogram and device interrogation data were examined during followâup to identify patients with recovery of conduction. Logistic regression analysis was used to compare clinical and procedural variables to predict conduction recovery.ResultsFollowing SEâTAVR, 17.5% of patients underwent device placement for new atrioventricular (AV) block. Among 40 patients with an average followâup time of 17.1 ± 8.1 months, 20 (50%) patients had durable recovery of AV conduction. Among 20 patients without longâterm recovery, four (20%) had transient recovery. The time to transient conduction recovery was 2.2 ± 0.2 months with repeat loss of conduction at 8.2 ± 0.9 months. On multivariate analysis, larger aortic annular size (odds ratio: 0.53 [0.28â0.86]/mm, P = 0.02) predicted lack of conduction recovery.ConclusionsHalf of the patients undergoing CIED placement for heart block following SEâTAVR recovered AV conduction within several months and maintained this over an extended followâup period. Some patients demonstrated transient recovery of conduction before recurrence of conduction loss. Larger aortic annulus diameter was negatively associated with conduction recovery.Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/150495/1/pace13694_am.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/150495/2/pace13694.pd
A millimeter-wave kinetic inductance detector camera for long-range imaging through optical obscurants
Millimeter-wave imaging provides a promising option for long-range target detection through optical obscurants such as fog, which often occur in marine environments. Given this motivation, we are currently developing a 150 GHz polarization-sensitive imager using a relatively new type of superconducting pair-breaking detector, the kinetic inductance detector (KID). This imager will be paired with a 1.5 m telescope to obtain an angular resolution of 0.09° over a 3.5° field of view using 3,840 KIDs. We have fully characterized a prototype KID array, which shows excellent performance with noise strongly limited by the irreducible fluctuations from the ambient temperature background. Full-scale KID arrays are now being fabricated and characterized for a planned demonstration in a maritime environment later this year
Rapid tranquilization for agitated patients in emergency psychiatric rooms: a randomized trial of olanzapine, ziprasidone, haloperidol plus promethazine, haloperidol plus midazolam and haloperidol alone
Spiral Laminar Flow is Associated with a Reduction in Disturbed Shear in Patient-Specific Models of an Arteriovenous Fistula
Enrichment of cheese with vitamin D3 and vegetable omega-3
International audienceEncapsulation technology provides many benefits to the food fortification: protection from oxygen and light, a best dispersion and biodisponibility, etc. In this study, vitamin D3 was encapsulated in two flaxseed oil emulsion formulations. Emulsions were stabilised with calcium caseinate in presence or absence of lecithin and used to standardise cheese milk. The use of flaxseed oil rich in alpha-linolenic acid allows fortifying the cheese in omega-3 and other polyunsaturated fatty acids (PUFA). Cheese yield and retention rate of proteins, fats and bioactive component were determined. Quantification of vitamin D3 and chemical stability of cheeses were performed up to 90 days of storage at 4â°C. Recovery level of vitamin D3 in cheese was, respectively, 91 and 84% in the presence or absence of lecithin. The encapsulation of vitamin D3 in the cheese in the form of emulsified particles of oil containing lecithin increased retention and stability of the vitamin in the curd. The fortification of cheese with vitamin D3 and PUFA had a positive impact on the composition, yield and chemical stability of the resultant cheese