4,075 research outputs found

    Visualization of smoke stack plume

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    System consists of ultraviolet vidicon tube, interference and color filters, ultraviolet telephoto lens, monitor, and waveform analyzer to extract information from video scene, stack plume viewed against sky. System will view SO2 and any other element which absorbs light at wavelength used

    TV fatigue crack monitoring system

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    An apparatus is disclosed for monitoring the development and growth of fatigue cracks in a test specimen subjected to a pulsating tensile load. A plurality of television cameras photograph a test specimen which is illuminated at the point of maximum tensile stress. The television cameras have a modified vidicon tube which has an increased persistence time thereby eliminating flicker in the displayed images

    A four-channel portable solar radiometer for measuring particulate and/or aerosol opacity and concentration of NO2 and SO2 in stack plumes

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    Solar absorption radiometry has been investigated as a method of measuring stackplume effluents. A simple and inexpensive instrument was constructed for observing the sun at four wavelengths: 800, 600, 400, and 310 nm. Higher wavelength channels measured the effect of the particulates and NO2, and an ultraviolet channel measured the contribution of SO2 to the attenuation. Stack-plume measurements of opacity and concentration of NO2 and SO2 were in basic agreement with in-stack measurements. The major limitation on the use of the radiometer is the requirement for an accessible viewing position which allows the sun-plume-observer relationship to be attained. It was concluded that the solar radiometer offers an inexpensive method for monitoring plume effluents when the viewing position is not restricted

    Rotating filters permit wide range of optical pyrometry

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    Gear-driven dual filter disks of graduated density vary linearly with respect to rotation, allowing a wide range of photographic pyrometry. this technique is applicable in metallurgy, glass, plastics and refractory research, and crystallography

    Simple optical system used to align spectrograph

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    Optically fast, portable spectrograph incorporates auxiliary optics in a boresight technique to use the zero order of the grating for visual alignment. This device obtains moderately resolved spectra of a multitude of light sources

    Creating an Education Pipeline: Training American Indian Teachers

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    The findings from this case study (Exton, 2008) add to the research on effective teacher education programs. The researcher found six factors which contributed to developing teacher identity among secondary teachers who participated in an American Indian teacher education program. The first three factors (personal, home, and community beliefs) were: 1) giving back to American Indian communities, 2) serving American Indian students, and 3) becoming empowered as American Indian teachers. The next three factors (school-based experiences) were: 4) cohort-based peer support, 5) preparation for content area expertise, and 6) teachers as role models. One of the most significant lessons from Exton’s research is about program continuity: there will be gaps in the pipeline of American Indian teachers as long as tribes are dependent on competitive government grants to support teacher education programs. The take-away message is that community partnerships between tribes, school districts, colleges and universities, and business leaders need to be maintained for long-term educational goals. Training American Indian teachers is an investment in the diversity of all communities

    Modified contour projector makes excellent contour densitometer

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    Thin glass beam splitter, densitometer head, and densitometer electronics are incorporated in a standard contour projector. The density contour of small areas of photographic film can be read. This instrument can be used as a research tool in process engineering
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