951 research outputs found

    Conceptual design for the Space Station Freedom fluid physics/dynamics facility

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    A study team at NASA's Lewis Research Center has been working on a definition study and conceptual design for a fluid physics and dynamics science facility that will be located in the Space Station Freedom's baseline U.S. Laboratory module. This modular, user-friendly facility, called the Fluid Physics/Dynamics Facility, will be available for use by industry, academic, and government research communities in the late 1990's. The Facility will support research experiments dealing with the study of fluid physics and dynamics phenomena. Because of the lack of gravity-induced convection, research into the mechanisms of fluids in the absence of gravity will help to provide a better understanding of the fundamentals of fluid processes. This document has been prepared as a final version of the handout for reviewers at the Fluid Physics/Dynamics Facility Assessment Workshop held at Lewis on January 24 and 25, 1990. It covers the background, current status, and future activities of the Lewis Project Study Team effort. It is a revised and updated version of a document entitled 'Status Report on the Conceptual Design for the Space Station Fluid Physics/Dynamics Facility', dated January 1990

    Surface tension-powered self-assembly of micro structures - The state-of-the-art

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    Functional Nanocomposite Surfaces for Antibacterial, Oil–Water Separation, and Optical Applications

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    Surface functionalisation can be used to modify the interaction between liquids and solid surfaces which is of importance in many applications such as self-cleaning, anti-fouling, and anti-fogging. The use of nanocomposite materials also provides a way of improving particular properties of the film even when small amounts of nano-material is used. The use of nanocomposite coatings to tailor the wettability, as well as to incorporate additional properties into surface coatings has been studied in this thesis for antibacterial, oil–water separation, and optical applications. Chapter 1 provides an introduction to nanocomposite coatings including a brief review of how they are prepared and for what applications they are used. Chapter 2 provides information on how surface wettability is measured as well as summarising the other experimental techniques used throughout this thesis. Chapter 3 describes the application of polymer–nanoparticle–fluorosurfactant complex nanocomposite coatings for antibacterial oil–water separation applications. Porous substrates coated with these polymer–nanoparticle–fluorosurfactant complex nanocomposite coatings are found to readily separate oil–water mixtures under both static and continuous flow as well as displaying antibacterial surface properties against Escherichia coli (Gram-negative bacteria) and Staphylococcus aureus (Gram-positive bacteria). A key advantage of this approach for coating substrates is its single-step simplicity. Potential applications include provision of safe drinking water, environmental pollution clean-up, and anti-fogging. Chapter 4 utilises a single-step, low temperature, solventless atomised spray plasma deposition technique for the preparation of antibacterial polymer–metallosurfactant nanocomposite coatings which are highly active against both Escherichia coli (Gram-negative bacteria) and Staphylococcus aureus (Gram-positive bacteria). Chapter 5 extends the use of the atomised spray plasma deposition technique into optical applications with the preparation of high refractive index hybrid polymer and polymer–inorganic nanocomposite coatings. Refractive indices as high as 1.936 at 635 nm wavelength have been obtained for 4-bromostyrene / toluene + TiO2 layers using very low titania loadings (8% w/v). Thin films with any desired refractive index up to 1.936 can be easily deposited by varying the precursor mixture composition

    Droplet actuator analyzer with cartridge

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    A droplet actuator with cartridge is provided. According to one embodiment, a sample analyzer is provided and includes an analyzer unit comprising electronic or optical receiving means, a cartridge comprising self-contained droplet handling capabilities, and a wherein the cartridge is coupled to the analyzer unit by a means which aligns electronic and/or optical outputs from the cartridge with electronic or optical receiving means on the analyzer unit. According to another embodiment, a sample analyzer is provided and includes a sample analyzer comprising a cartridge coupled thereto and a means of electrical interface and/or optical interface between the cartridge and the analyzer, whereby electrical signals and/or optical signals may be transmitted from the cartridge to the analyzer

    Gas-Grain Simulation Facility: Fundamental studies of particle formation and interactions. Volume 2: Abstracts, candidate experiments and feasibility study

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    An overview of the Gas-Grain Simulation Facility (GGSF) project and its current status is provided. The proceedings of the Gas-Grain Simulation Facility Experiments Workshop are recorded. The goal of the workshop was to define experiments for the GGSF--a small particle microgravity research facility. The workshop addressed the opportunity for performing, in Earth orbit, a wide variety of experiments that involve single small particles (grains) or clouds of particles. Twenty experiments from the fields of exobiology, planetary science, astrophysics, atmospheric science, biology, physics, and chemistry were described at the workshop and are outlined in Volume 2. Each experiment description included specific scientific objectives, an outline of the experimental procedure, and the anticipated GGSF performance requirements. Since these experiments represent the types of studies that will ultimately be proposed for the facility, they will be used to define the general science requirements of the GGSF. Also included in the second volume is a physics feasibility study and abstracts of example Gas-Grain Simulation Facility experiments and related experiments in progress

    Systems, methods, and products for graphically illustrating and controlling a droplet actuator

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    Systems for controlling a droplet microactuator are provided. According to one embodiment, a system is provided and includes a controller, a droplet microactuator electronically coupled to the controller, and a display device displaying a user interface electronically coupled to the controller, wherein the system is programmed and configured to permit a user to effect a droplet manipulation by interacting with the user interface. According to another embodiment, a system is provided and includes a processor, a display device electronically coupled to the processor, and software loaded and/or stored in a storage device electronically coupled to the controller, a memory device electronically coupled to the controller, and/or the controller and programmed to display an interactive map of a droplet microactuator. According to yet another embodiment, a system is provided and includes a controller, a droplet microactuator electronically coupled to the controller, a display device displaying a user interface electronically coupled to the controller, and software for executing a protocol loaded and/or stored in a storage device electronically coupled to the controller, a memory device electronically coupled to the controller, and/or the controller
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