Autoignition test cell Patent

Test chamber for determining decomposition and autoignition of materials used in spacecraft under controlled environmental condition

Flow rate/pressure drop data gathered from testing a sample of the Space Shuttle Strain Isolation Pad (SIP): Effects of ambient pressure combined with tension and compression conditions

Tests were conducted on a sample of strain isolation pad (SIP) typical of that used in the shuttle orbiter thermal protection system to determine the characteristics of SIP internal flow. Data obtained were pressure drop as a function of flow rate for a range of ambient pressures representing various points along the Shuttle trajectory and for stretched and compressed conditions of the SIP. Flow was in the direction of the weave parallel to most of the fibers. The data are plotted in several standard engineering formats in order to be of maximum utility to the user. In addition to providing support to the Space Shuttle Program, these data are a source of experimental information on flow through fiberous (rather than the more usual sand bed type) porous media

Stress fracture of bilateral tibial metaphysis due to ceremonial march training: a case report

Stress fractures are caused by repetitive microtraumas that occur during unusual or increased activities. Clinical suspicion is essential for the diagnosis. A twenty-years old soldier was presented with bilateral knee pain and restriction of knee movements after a period of training for ceremonial march. Although plain X-rays were normal, scintigraphy and MRI revealed stress fractures at metaphyseal region of both tibias. History of a patient presenting with persisting joint or bone pain after an unusual repetitive activity should be delicately inquired. Typical history, although pain might be localized to unusual sites, should raise the suspicion of a stress fracture

Are vaccination programmes delivered by lay health workers cost-effective? A systematic review

<p>Abstract</p> <p>Background</p> <p>A recently updated Cochrane systematic review on the effects of lay or community health workers (LHWs) in primary and community health care concluded that LHW interventions could lead to promising benefits in the promotion of childhood vaccination uptake. However, understanding of the costs and cost-effectiveness of involving LHWs in vaccination programmes remains poor. This paper reviews the costs and cost-effectiveness of vaccination programme interventions involving LHWs.</p> <p>Methods</p> <p>Articles were retrieved if the title, keywords or abstract included terms related to 'lay health workers', 'vaccination' and 'economics'. Reference lists of studies assessed for inclusion were also searched and attempts were made to contact authors of all studies included in the Cochrane review. Studies were included after assessing eligibility of the full-text article. The included studies were then reviewed against a set of background and technical characteristics.</p> <p>Results</p> <p>Of the 2616 records identified, only three studies fully met the inclusion criteria, while an additional 11 were retained as they included some cost data. Methodologically, the studies were strong but did not adequately address affordability and sustainability and were also highly heterogeneous in terms of settings and LHW outcomes, limiting their comparability. There were insufficient data to allow any conclusions to be drawn regarding the cost-effectiveness of LHW interventions to promote vaccination uptake. Studies focused largely on health outcomes and did illustrate to some extent how the institutional characteristics of communities, such as governance and sources of financial support, influence sustainability.</p> <p>Conclusion</p> <p>The included studies suggest that conventional economic evaluations, particularly cost-effectiveness analyses, generally focus too narrowly on health outcomes, especially in the context of vaccination promotion and delivery at the primary health care level by LHWs. Further studies on the costs and cost-effectiveness of vaccination programmes involving LHWs should be conducted, and these studies should adopt a broader and more holistic approach.</p

Development of an object-oriented infrared imaging system simulator and its application to multi-spectral infrared imaging

This thesis describes research efforts undertaken to investigate passive, multi-spectral infrared imaging. Although many applications of multi-spectral infrared imaging may exist, the high cost of developing viable multi-spectral technologies has limited research into, and subsequent exploitation of, these applications. Our efforts attempt to find a way to minimize the cost of this research while concurrently investigating one of the possible applications of multi-spectral infrared imaging using current infrared imaging technology. The outcome is an object-oriented, infrared imaging system simulator, called IRIMAGE, and a series of experiments and simulations that confirm the viability of gaseous pollution detection using passive, multi-spectral infrared imaging. IRIMAGE is a flexible tool capable of applications research and basic infrared system design. This combination makes it a cost effective tool for researching the applications of multi-spectral IR imaging and the technological requirements they require. We present the physical and computational concepts that underly the simulation as well as certain computational advances made during IRIMAGE's development. A comprehensive discussion of the primary objects that make up IRIMAGE and how the simulation works is also provided. Since the reliability of a simulation depends on experimental verification of its output, we also present the results of this verification. Besides verifying IRIMAGE, these experiments investigated detecting gaseous pollutants using passive, multi-spectral IR imaging. The thesis describes the imaging system we used and the theoretical background of these experiments. For each experiment, we describe the experimental setup and how IRIMAGE simulated the experiment. Finally, we compare the experimental and simulation results. Although these experiments verify IRIMAGE and demonstrate how gaseous pollutants can be detected using passive, multi-spectral IR imaging, further research is necessary and certain technological advances must be made before this application can be exploited. More information about IRIMAGE is available on the web at www.ssdp.caltech.edu

Innesti ossei omoplastici

Innesti ossei omoplastic

References to articles upon children, schools, and libraries.

"Compiled by Marion Dickinson in 1897; revised to October, 1899 by Mary Medlicott."Mode of access: Internet