21,842 research outputs found
Machine Variables in Basis Weight Control
The purpose of this study was to determine the significance of machine variables as they affect the scan average basis weight readings obtained from the Industrial Nucleonics basis weight gauge on the fourdrinier paper machine of the Department of Paper Science and Engineering at Western Michigan University. The variables used in this study were machine speed, machine chest and tray white water consistencies, tray white water flow, flow to the headbox, stock valve position and head on the stock valve. Each of the above variables was sampled every ten minutes.
There were definite correlations between basis weight variation and machine speed, machine chest consistency and head levels. A smoothing out of these process variations would give a more uniform sheet and better basis weight control
Mass Spectrometry in the Elucidation of the Glycoproteome of Bacterial Pathogens
Presently some three hundred post-translational modifications are known to occur in bacteria in vivo. Many of
these modifications play critical roles in the regulation of proteins and control key biological processes. One of the most
predominant modifications, N- and O-glycosylations are now known to be present in bacteria (and archaea) although they
were long believed to be limited to eukaryotes. In a number of human pathogens these glycans have been found attached
to the surfaces of pilin, flagellin and other surface and secreted proteins where it has been demonstrated that they play a
role in the virulence of these bacteria. Mass spectrometry characterization of these glycosylation events has been the enabling
key technology for these findings. This review will look at the use of mass spectrometry as a key technology for the
detection and mapping of these modifications within microorganisms, with particular reference to the human pathogens,
Campylobacter jejuni and Mycobacterium tuberculosis. The overall aim of this review will be to give a basic understanding
of the current ‘state-of-the-art’ of the key techniques, principles and technologies, including bioinformatics tools, involved
in the analysis of the glycosylation modifications
A shipboard cable-hauling system for large electrical cables
An air -powered hauling machine and reeling device for use at sea with large electrical cable systems such as hydrophone arrays is described. The system may be used to haul cables from 0. 3 to 2 . 0 inch diameter. Hauling tensions up to 9 80 lbs . and speeds up to 4 30 ft/ min. are provided. The principal advantage of the system is that it does not cause the cable to bend while under tension. Reeling is accomplished under only sufficient tension to cause the cable to conform to the reel.Undersea Warfare Branch Office of Naval Research under Contracts Nonr-4029(00) NR 260-10
Current activities at IITRI on high- temperature protective coatings
Heat resistant protective coatings for use in liquid propellant rocket engine
Analytical and experimental study of the dynamics of a single-tube counterflow boiler
Experimental and analytical study of dynamics of single tube counterflow boile
Shear-stress controlled dynamics of nematic complex fluids
Based on a mesoscopic theory we investigate the non-equilibrium dynamics of a
sheared nematic liquid, with the control parameter being the shear stress
(rather than the usual shear rate, ). To
this end we supplement the equations of motion for the orientational order
parameters by an equation for , which then becomes time-dependent.
Shearing the system from an isotropic state, the stress- controlled flow
properties turn out to be essentially identical to those at fixed .
Pronounced differences when the equilibrium state is nematic. Here, shearing at
controlled yields several non-equilibrium transitions between
different dynamic states, including chaotic regimes. The corresponding
stress-controlled system has only one transition from a regular periodic into a
stationary (shear-aligned) state. The position of this transition in the
- plane turns out to be tunable by the delay
time entering our control scheme for . Moreover, a sudden
change of the control method can {\it stabilize} the chaotic states appearing
at fixed .Comment: 10 pages, 11 figure
A geometry package for generation of input data for a three-dimensional potential-flow program
The preparation of geometric data for input to three-dimensional potential flow programs was automated and simplified by a geometry package incorporated into the NASA Langley version of the 3-D lifting potential flow program. Input to the computer program for the geometry package consists of a very sparse set of coordinate data, often with an order of magnitude of fewer points than required for the actual potential flow calculations. Isolated components, such as wings, fuselages, etc. are paneled automatically, using one of several possible element distribution algorithms. Curves of intersection between components are calculated, using a hybrid curve-fit/surface-fit approach. Intersecting components are repaneled so that adjacent elements on either side of the intersection curves line up in a satisfactory manner for the potential-flow calculations. Many cases may be run completely (from input, through the geometry package, and through the flow calculations) without interruption. Use of the package significantly reduces the time and expense involved in making three-dimensional potential flow calculations
Study of aerodynamic technology for single-cruise-engine V/STOL fighter/attack aircraft
A viable, single engine, supersonic V/STOL fighter/attack aircraft concept was defined. This vectored thrust, canard wing configuration utilizes an advanced technology separated flow engine with fan stream burning. The aerodynamic characteristics of this configuration were estimated and performance evaluated. Significant aerodynamic and aerodynamic propulsion interaction uncertainties requiring additional investigation were identified. A wind tunnel model concept and test program to resolve these uncertainties and validate the aerodynamic prediction methods were defined
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