97,747 research outputs found
Joshua Davis: Author of Spare Parts
No full textCitation: K-State First (2016). Joshua Davis: Author of Spare Parts [Flier]. Manhattan, Kansas: K-State First.Flyer advertising Joshua Davis's author talk at Kansas State University
A rain-rate retrieval algorithm for attenuated radar measurements
No full textAdynamic regularization scheme for rain-rate retrievals from attenuated radar measurements is presented. Most regularization techniques, including the optimal estimation method, use the state-space parameters to regularize the problem, which will always lead to a bias in the solution. To avoid this problem the authors introduce an evolutionary regularization technique, which is based on the spatial derivative of the measured reflectivity profile and allows for a bias-free global solution. The regularization strength is determined by the quadratic eigenvalue solution using the regularized total least squares method. With the new method, the authors perform a retrieval of rain-rate profiles from simulated measurements of a nadir-pointing W-band (94 GHz) radar, in a configuration similar to the cloud radar employed on CloudSat. The simulations assume that multiple scattering is negligible and only liquid hydrometeors are taken into account. The authors compare the results of this method with the outcome of an optimal estimation method and demonstrate that their method is superior in terms of reliability, correlation coefficient, and dispersion to the optimal estimation method for layers experiencing high values of attenuation; therefore, the a priori bias typical for optimal estimation solutions is avoided. © 2010 American Meteorological Society
Steven Johnson Author Talk Poster
No full textK-State Book NetworkA poster advertising an author talk by Steven Johnson at Kansas State University on September 3, 2014. Steven Johnson's book "The Ghost Map" was the 2014-2015 common book
Group photo of the Office Force of County Clerks, King County, Seattle, Washington, January 9, 1917
No full textWritten on photograph: The names of the photographed individuals.
PHColl334.Simmer
INTESPACE's new thermal-vacuum test facility: SIMMER
No full textThe development of an European satellite market over the last 10 years, the industrialization of space applications, and the new requirements from satellite prime contractors have led INTESPACE to increase the test center's environmental testing capacities through the addition of a new thermal-vacuum test facility of impressive dimensions referred to as the SIMMER. The SIMMER is a simulator specifically created for the purpose of conducting acceptance tests of satellites and of large structures of the double launching ARIANE IV or half ARIANE V classes. The chamber is 8.3 meters long with a diameter of 10 meters. The conceptual design of a chamber in the horizontal plane and at floor level is in a view to simplify test preparation and to permit final electrical checks of the spacecraft in its actual test configuration prior to the closing of the chamber. The characteristics of the SIMMER complies with the requirements being currently defined in terms of thermal-vacuum tests: (1) thermal regulation (temperatures cycling between 100 K and 360 K); (2) clean vacuum (10(exp -6) mbar); (3) 600 measurement channels; and (4) 100 000 cleanliness class. The SIMMER is located in INTESPACE's space vehicle test complex in which a large variety of environmental test facilities are made available for having a whole test program completed under one and a same roof
Determinants of DHA levels in early infancy: differential effects of breast milk and direct fish oil supplementation
No full textAbstract not availableS.J. Meldrum, N. D'Vaz, Y. Casadio, J.A. Dunstan, N. Niels Krogsgaard-Larsen, K. Simmer, S.L. Prescot
Length of breast-feeding influences the development of visual-evoked potential (VEP) acuity in healthy, term infants
No full textMaria Makrides, Mark Neumann, Karen Simmer, Robert Gibso
Are long-chain polyunsaturated fatty-acids essential nutrients in infancy?
No full textAbstract not availableMaria Makrides, Mark Neumann, Karen Simmer, John Pater, Robert Gibso
Validation of SIMMER-III code for in-box LOCA of WCLL BB: Pre-test numerical analysis of Test D1.1 in LIFUS5/Mod3 facility
No full textOne of the four breeding blanket concepts for European DEMO nuclear fusion reactor is the Water-Cooled Lithium Lead Breeding Blanket (WCLL BB). The WCLL in-box LOCA (Loss Of Coolant Accident) is a major safety concern of this component, therefore transient behavior shall be investigated to support the design, to evaluate the consequences and to adopt mitigating countermeasures. To fulfill this objective, at first, SIMMER-III code was improved by implementing the chemical reaction model between PbLi and water. Then, SIMMER-III Verification and Validation (V&V) procedures have been established and conducted to obtain a qualified code for deterministic safety analysis. The verification activity was successfully completed, while the validation activity requires further effort according to the R&D plan set up in the framework of the EUROfusion Project. In view of this, an experimental campaign and a test matrix has been designed in LIFUS5/Mod3 facility performing pre-test analyses of Test D1.1. The preliminarily-defined test matrix will be used for the validation SIMMER-III according to a standard procedure. At the present stage, a pre-test numerical analysis was performed to support future experimental tests. The presented work aims to support the upcoming experimental activity in terms of setting up Boundary & Initial condition, specifying the most important parameters to be measured during tests and calculated by SIMMER-III code during transient and obtaining the best nodalization for the post-testing simulation. In particular, a qualitative analysis of obtained results was performed according to the available data time trends and based on engineering considerations. It aims to interpret the resulting sequence of main events and the identification of phenomenological windows and aspects, relevant to pressure transient and hydrogen production due to the chemical reaction between heavy liquid metal and water
Enhanced Simmer Neutronics Tool for Studying Fast Reactor Distorted Core Configurations
No full textInternational audienceCore disruptive accidents in fast reactors need to bemonitored carefully since they may lead to possible criticalityconfigurations. However, the worst-case scenariomay have small probability occurrences, but the proof ofit requires multidisciplinary studies. Even with the upgradein computer performance, calculations would requireseveral months on several parallel computers.Accurate calculations with short running times are thusrequired. Updating the neutronics module of SIMMERset up in the 1970s was therefore carried out with thehelp of routines able to handle probability tables forgenerating broad group libraries. The use of such librariestogether with new SIMMER options is now able toproduce reliable results in all sorts of situations whilemaintaining reduced calculation times.Indeed, until now, neutronics calculations from SIMMERgave results quite far from ERANOS ones (differencesin reactivity larger than 1.5
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