Food access and diet quality are associated with quality of life outcomes among HIV-infected individuals in Uganda.

BACKGROUND: Food insecurity is associated with poor nutritional and clinical outcomes among people living with HIV/AIDS. Few studies investigate the link between food insecurity, dietary diversity and health-related quality of life among people living with HIV/AIDS. OBJECTIVE: We investigated whether household food access and individual dietary diversity are associated with health-related quality of life among people living with HIV/AIDS in Uganda. METHODS: We surveyed 902 people living with HIV/AIDS and their households from two clinics in Northern Uganda. Health-related quality of life outcomes were assessed using the Medical Outcomes Study (MOS)-HIV Survey. We performed multivariate regressions to investigate the relationship between health-related quality of life, household food insecurity and individual dietary diversity. RESULTS: People living with HIV/AIDS from severe food insecurity households have mean mental health status scores that are 1.7 points lower (p<.001) and physical health status scores that are 1.5 points lower (p<.01). Individuals with high dietary diversity have mean mental health status scores that were 3.6 points higher (p<.001) and physical health status scores that were 2.8 points higher (p<.05). CONCLUSIONS: Food access and diet quality are associated with health-related quality of life and may be considered as part of comprehensive interventions designed to mitigate psychosocial consequences of HIV

Adaption eines digitalen PIV-Systems an ein instationäres Strömungsexperiment

Für die Untersuchung instationärer, durch ein singuläres Ereignis angeregter Strömungsvorgänge mittels der Particle-Image-Velocimetry ist eine Triggertechnik entwickelt worden, die es ermöglicht, das Meßsystem auch beim Einsatz gepulster und thermisch stabilisierter (Nd:YAG-)Laser mit dem Strömungsexperiment zu synchronisieren und die Separationszeit zwischen den Lichtpulsen an die sich während der Dauer der Meßreihe ändernden Versuchsbedingungen anzupassen. Diese Technik ist erfolgreich bei PIV- Messungen im Nachlauf eines nach einem Katapultstart freifliegenden Flugzeugmodells eingesetzt worden

Experimental investigation of aircraft trailing vortices in a catapult facility using PIV

The evolution of the trailing vortices behind a free flying aircraft model has been investigated experimentally by means of digital particle image velocimetry (PIV). The measurements took place in the catapult facility of ONERA, Lille, where the near field as well as the very far field of the wake flow can be studied in a ground-based frame of reference. Tracer particles addad to the flow were illuminated by a pulser laser light sheet in a plane crosswise to the flight path of the model. Two CCD cameras recorded neighbouring areas of the flow field simultaneously. Image recording was set off by the launching model crossing a photoelectric barried in order to survey defined planes behind the model. The resulting velocity and vorticity fields give quantitative information on the structure and trajectory of the trailing vortice

Near- to Midfield-Wake: Experimental Characterisation

The wake of wide body aircraft is a hazard to following aircraft in approach, climb, and cruise. Thus, a large amount of experimental research effort has been devoted to instability and breakdown of vortices. However, investigations of the instabilities of vortices in the wake far field very often are lacking the link to the near field and are inconclusive as to the aerodynamic, whereas investigations of the wake in a wind tunnel very often miss the link to the mid- and far field at a sufficiently high Reynolds-number. For this reason, the wake of an Airbus A-300 with different flap settings was investigated in a joint ONERA/DLR-project in the catapult of ONERA Lille. The Particle Image Velocimetry was chosen as a non-intrusive testing technique. In a particular setting of the landing flaps, a premature breakdown of the vortex cores was observed. The origin of the breakdown was understood as a Raylleigh-Ludwieg instability, which occurs if destabilising centrifugal forces dominate stabilising pressure forces