http://uf.catalog.fcla.edu/uf.jsp?st=UF030360919%26ix=pm%26I=0%26V=D%26pm=1
Topics: Light sources, Microscopes.
13
13
Jul 6, 2020
07/20
by
Nunn, Daniel
texts
eye 13
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24 pages : 18 cm
Topics: Light sources -- Juvenile literature, Light -- Juvenile literature, Light, Light sources
6
6.0
Nov 25, 2020
11/20
by
Sadler, Wendy
texts
eye 6
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comment 0
pages cm
Topics: Light -- Juvenile literature, Light sources -- Juvenile literature, Light, Light sources
10
10.0
Sep 19, 2019
09/19
by
Solway, Andrew
texts
eye 10
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32 pages : 25 cm
Topics: Light -- Juvenile literature, Sunshine -- Juvenile literature, Light sources -- Juvenile...
39
39
Oct 8, 2018
10/18
by
Pipe, Jim, 1966-
texts
eye 39
favorite 2
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32 pages : 25 cm
Topics: Light -- Juvenile literature, Light sources -- Juvenile literature, Light, Light sources, Sun --...
The photometry of the high-efficiency gas-filled lamp presents difficulties not yet experienced with other types of lamps. The consumption and candle power are found to vary with the position of the lamp, both being greater with the lamp mounted tip up than when it is mounted tip down; if the lamp be rotated to obtain its mean candle-power it is found that the consumption and candle-power vary with the speed of rotation and that the flickering in the photometer is much greater than when...
Topic: lamps and lighting/ B8530B Light sources
In a previous paper Middlekauff and Skogland derived characteristic equations for the performance of tungsten lamps in terms of the applied voltage. These results are now applied to the construction of a chart by means of which, if the watts per c.p. are known at any voltage, the c.p. and the watts per c.p, at any other voltage may be read off directly. A chart is given which has a range of voltage of 94 to 166 volts, and a range of watts per c.p. of 0.70 to 2.05. Tables of figures drawn up by...
Topic: lamps and lighting/ B8530B Light sources
247
247
Nov 7, 2013
11/13
by
Blühm, Andreas; Lippincott, Louise, 1953-; Carnegie Museum of Art; Van Gogh Museum, Amsterdam
texts
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"This book is published to coincide with the exhibition Light! the Industrial Age, 1750-1900. Art & Science, Technology & Society at the Van Gogh Museum in Amsterdam (20 October 2000-11 February 2001) and the Carnegie Museum of Art, Pittsburgh (6 April-29 July 2001)."--Colophon
Topics: Light in art, Light sources, Light
The initial part of the paper summarises past researches on the pentane lamp. Subsequently general instructions are given for the setting-up and operation of the lamp, and some experiences of the lamps in the United States summarised. A curve is given illustrating change in c.p. caused by varying height of flame, and special emphasis is placed on the avoidance of vitiation of the air, cooling air-currents, etc. Nevertheless it is believed that, with care, the values attained from any lamp can...
Topic: lamps and lighting/ B8530B Light sources
[6], 65 pages : 23 cm
Topics: Motion picture projectors -- Light sources, Motion picture projection, Motion picture projection,...
The authors refer to the use of tungsten filaments in "comparison lamps" such as are employed in series of tests at the Bureau of Standards. A lamp employed in this capacity is run continuously for long periods of time, and it is desirable that the change in candle-power during this time should be as small as possible. The tungsten lamp, when running at about 3 watts per c.p., yields light which matches that of a carbon lamp in colour; when burnt under these conditions lamps were...
Topics: lamps and lighting, photometry/ B8530B Light sources
The full paper corresponding to.
Topics: lamps and lighting, photometry/ B8530B Light sources
85
85
Jun 2, 2010
06/10
by
Matson, Tim, 1943-
texts
eye 85
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Includes index
Topics: Light sources, Lighting, Gas-lighting, Candles, Hearths
Further investigations by the Bureau of Standards on the effects of frosting incandescent lamps are described. The results of frosting are classified under three general heads: (1) Change in absorption, (2) change in distribution, and (3) change in life. The lamps were seasoned, and the mean spherical c.p. of 25 lamps of each type was measured. They were then sent to the factory to be frosted, and when they came back their c.p. was measured again. The loss of light is probably due to absorption...
Topics: alternators, lamps and lighting/ B8530B Light sources
The full paper corresponding to.
Topics: lamps and lighting, photometry/ B8530B Light sources
4
4.0
Jun 16, 2021
06/21
by
Watson, Bruce, author
texts
eye 4
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comment 0
xiv, 282 pages, 8 unnumbered pages of plates : 25 cm
Topics: Light, Light -- Religious aspects, Light sources, Electromagnetic waves
59
59
Dec 4, 2012
12/12
by
Berger, Melvin
texts
eye 59
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comment 1
Includes index
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Topics: Optical instruments, Light sources, Lenses, Lasers, Light, Optics
0
0.0
Jun 25, 2022
06/22
by
Spilsbury, Louise, author
texts
eye 0
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comment 0
32 pages : 27 cm
Topics: Light sources -- Juvenile literature, Light -- Juvenile literature, Light sources, Light, Sources...
6
6.0
Nov 25, 2021
11/21
by
Shaffer, Jody Jensen
texts
eye 6
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32 pages : 24 cm
Topics: Light -- Juvenile literature, Light sources -- Juvenile literature, Optics -- Juvenile literature
4
4.0
Jul 12, 2021
07/21
by
Kitsinelis, Spyridon
texts
eye 4
favorite 1
comment 0
xi, 213 p., [15] p. of plates : 25 cm
Topics: Lasers, Light sources, Optics, SCIENCE / Optics, TECHNOLOGY & ENGINEERING / Lasers &...
532
532
Jun 26, 2010
06/10
by
Ritter, J. A
texts
eye 532
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comment 0
Hydrostatic life-off seal zero leakage and static sealing and rubbing tests for use in liquid hydrogen turbine pumps
Topics: COSMOLOGY, GAMMA RAYS, INTERGALACTIC MEDIA, LIGHT SOURCES, PHOTONS, X RAYS
Topics: lamps and lighting, measurements and use of instruments/ B8530B Light sources
197
197
May 23, 2011
05/11
by
Beitelmal, A.; Shaw, B. D
texts
eye 197
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A mathematical model taking into account small (and constant) gravitational levels is developed for vaporization of an isolated liquid droplet suspended in a stagnant atmosphere. A goal of the present analysis is to see how small gravitational levels affect droplet gasification characteristics. Attention is focused upon determining the effects on gas-phase phenomena. The conservation equations arc normalized and nondimensionalized, and a small parameter that accounts for the effects of gravity...
Topics: LIGHT SOURCES, PHOTORECEPTORS, GAS LASERS, PHOTOCHROMISM, BACTERIA, ARGON LASERS, FOCUSING, CODING,...
176
176
Sep 20, 2010
09/10
by
Stone, Barbara A.; Page, John R
texts
eye 176
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comment 0
As the number of spacefaring nations of the world increases, so does the difficulty of competing in a global economy. The development of high technology products and services for space programs, and the economic exploitation of these technologies for national economic growth, requires professionals versed in both technical and commercial aspects of space. Meeting this requirement academically presents two challenges. On the technical side, enrollment in science and engineering is decreasing in...
Topics: DISPLACEMENT, INTERFEROMETERS, OPTICAL FIBERS, PRESSURE SENSORS, COHERENT LIGHT, LIGHT SOURCES,...
222
222
Jul 11, 2010
07/10
by
PATON, B
texts
eye 222
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BASIC DIRECTIONS IN THE DEVELOPMENT OF SPACE TECHNOLOGY ARE DEFINED. THESE DIRECTIONS ARE THE SCIENTIFIC TESTS, TECHNOLOGY FOR MAKING REPAIRS IN SPACE, AND PRODUCTION OF VARIOUS MATERIALS AND COMPONENTS IN SPACE. PRACTICAL EXAMPLES OF THESE DIRECTIONS ARE DISCUSSED.
Topics: BACTERIA, COLONIES, EARTH ATMOSPHERE, GEOMAGNETISM, LIGHT SOURCES, MOLD, SOLAR FLUX, SUSPENDING...
201
201
May 30, 2010
05/10
by
Furuhata, M.; Nakamura, J.; Nakamura, M.; Nakamura, T
texts
eye 201
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Measurement of atmospheric light layer utilizing rockets
Topics: ATMOSPHERIC REFRACTION, ATMOSPHERIC STRATIFICATION, LIGHT SOURCES, ROCKETS, ATMOSPHERIC REFRACTION,...
A new class of tunable, monochromatic gamma-ray sources capable of operating at high peak and average brightness is currently being developed at LLNL for nuclear photoscience and applications. These novel systems are based on Compton scattering of laser photons by a high brightness relativistic electron beam produced by an rf photoinjector. A prototype, capable of producing 10(8) 0.7 MeV photons in a single shot, with a fractional bandwidth of 1%, and a repetition rate of 10 Hz, is currently...
Topics: DTIC Archive, LAWRENCE LIVERMORE NATIONAL LAB CA, *LASERS, BRIGHTNESS, GAMMA RAYS, LIGHT SOURCES
The upward emission direction of artificial light from cities is unknown, and is the most important systematic uncertainty in simulations of skyglow. We present a technique for measuring the emission for zenith angles up to 70 degrees.
Topics: DTIC Archive, NAVAL OBSERVATORY FLAGSTAFF AZ, *LIGHT SCATTERING, DETECTORS, INSTRUMENTATION, LIGHT...
5
5.0
Nov 15, 2021
11/21
by
Shaffer, Jody Jensen
texts
eye 5
favorite 1
comment 0
1 online resource (32 pages) :
Topics: Light -- Comic books, strips, etc, Light -- Juvenile literature, Light sources -- Comic books,...
The Michelson Interferometer is a device used in many applications, but here it was used to measure small differences in distance, in the milli-inch range, specifically for defects in the Orbiter windows. In this paper, the method of using the Michelson Interferometer for measuring small distances is explained as well as the mathematics of the system. The coherence length of several light sources was calculated in order to see just how small a defect could be measured. Since white light is a...
Topics: NASA Technical Reports Server (NTRS), MICHELSON INTERFEROMETERS, GLASS, DEFECTS, LIGHT SOURCES,...
422
422
Jun 13, 2011
06/11
by
Batina, John T
texts
eye 422
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An advanced small perturbation (ASP) potential flow theory has been developed to improve upon the classical transonic small perturbation (TSP) theories that have been used in various computer codes. These computer codes are typically used for unsteady aerodynamic and aeroelastic analyses in the nonlinear transonic flight regime. The codes exploit the simplicity of stationary Cartesian meshes with the movement or deformation of the configuration under consideration incorporated into the solution...
Topics: LASER OUTPUTS, REMOTE SENSING, OPTICAL RADAR, LIGHT SOURCES, LIGHT BEAMS, FIELD OF VIEW, DETECTION,...
A radiation pyrometer for measuring the true temperature of a body is provided by detecting and measuring thermal radiation from the body based on the principle that the effects of angular emission I(sub 1) and reflection I(sub 2) on the polarization states p and s of radiation are complementary such that upon detecting the combined partial polarization state components I(sub p) =I(sub 1p) + I(sub 2p) and I(sub s)=I(sub 1s) + I(sub 2s) and adjusting the intensity of the variable radiation...
Topics: NASA Technical Reports Server (NTRS), EMITTANCE, LIGHT SOURCES, RADIATION PYROMETERS, PATENTS,...
Publications of this research are reported in Science, JACS, JPC, ChemPhysChem, PNAS, Nano Lett., and PCCP. Developmentally, we have advanced ultrafast electron microscopy (and diffraction) to a new level. The electron pulses typically have an energy of 30 keV for diffraction and 100-200 keV for microscopy, corresponding to speeds of 33-70% of the speed of light. Recently, we introduced the concept of tilted optical pulses into diffraction and imaging techniques and demonstrated the methodology...
Topics: DTIC Archive, Zewail,Ahmed, California Institute of Technology Pasadena United States, electron...
The purpose of this study was to give readers an understanding of available options of dental handpiece lighting systems and the advantages and disadvantages of these options. Criteria and given for selection of acceptable systems. Nine different lighting systems are reviewed and compared. These evaluations were performed by the Dental Investigation Service at the USAF school of Aerospace Medicine.
Topics: DTIC Archive, Weyrauch, Curtis D, SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX, *LIGHT SOURCES,...
Surface plasmon enhanced illumination Is a photonics device that creates a nanometric source of bright propagating light. This light source serves as the basis for a direct write maskless photolithography system. The key progress made on this project is the demonstration of lateral resolution less than 50nm. The lateral resolution corresponds directly to feature size when patterning a photoresist.
Topics: DTIC Archive, HARVARD MEDICAL SCHOOL BOSTON MA, *ILLUMINATION, *LITHOGRAPHY, *PLASMONS, ELECTRONS,...
The device described exploits cathodoluminescence to generate intense light in the visible and near-infrared regions of the spectrum. In this device, the material to be excited to luminescence is a layer of quartz or alumina powder on an electrically conductive plate exposed to a low-pressure plasma discharge. The plate is electrically biased positively to collect electron current.
Topics: NASA Technical Reports Server (NTRS), CATHODOLUMINESCENCE, LIGHT SOURCES, LIGHTING EQUIPMENT,...
This paper discusses the relationship between the shape of the shading, the surface whose depth at each point equals the brightness in the image, and the shape of the original surface. I suggest the shading as an initial local approximation to shape, and discuss the scope of this approximation and what it may be good for. In particular, qualitative surface features, such as the sign of the Gaussian curvature, can be computed in some cases directly from the shading. Finally, a method to compute...
Topics: DTIC Archive, Weinshall, Daphna, MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB,...
204
204
May 29, 2011
05/11
by
Michael, B. Patrick; Nuth, J. A., III; Lilleleht, L. U
texts
eye 204
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We report our experiences with zinc nucleation in a microgravity environment aboard NASA's Reduced Gravity Research Facility. Zinc vapor is produced by a heater in a vacuum chamber containing argon gas. Nucleation is induced by cooling and its onset is easily detected visually by the appearance of a cloud of solid, at least partially crystalline zinc particles. Size distribution of these particles is monitored in situ by photon correlation spectroscopy. Samples of particles are also extracted...
Topics: PINEAL GLAND, EPITHELIUM, HISTOLOGY, HORMONES, RATS, RETARDING, LIGHT EMITTING DIODES,...
New 50 Kw xenon short arc lamp mounted within elliptical collector provides irradiance levels up to 4.4 x 10 to the 7th power watts/sq m with non-uniformity ratio of 3.30. Energy mixer or light pipe between lamp source and target improves non-uniformity to required ratio.
Topics: NASA Technical Reports Server (NTRS), ARC LAMPS, BALLASTS (IMPEDANCES), IRRADIANCE, LIGHT SOURCES,...
A photometer that tracks a path of a moving light source with little or no motion of the photometer components. The system includes a non-moving, truncated paraboloid of revolution, having a paraboloid axis, a paraboloid axis, a small entrance aperture, a larger exit aperture and a light-reflecting inner surface, that receives and reflects light in a direction substantially parallel to the paraboloid axis. The system also includes a light processing filter to receive and process the redirected...
Topics: NASA Technical Reports Server (NTRS), LIGHT SOURCES, PHOTOMETERS, PARABOLIC BODIES, PARTICLE...
A star simulator is described which is capable of simulating a field of three or more stars in response to signals from a computer interface. Star magnitude and spectral output can be manipulated and absolute position measurements can be obtained with the system. The simulator is a single axis system which consists of two assemblies: a light source and filter wheel assembly, and a translation stage assembly. The assemblies are self contained on 60.96 x 60.96 cm breadboards and are connected via...
Topics: NASA Technical Reports Server (NTRS), SIMULATORS, STARS, LIGHT SOURCES, OPTICAL FILTERS, STELLAR...
255
255
Jun 21, 2010
06/10
by
Rossler, H
texts
eye 255
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Pulmonary scintigraphy in lung edema
Topics: CELESTIAL NAVIGATION, RESOLUTION, SEXTANTS, IRRADIATION, VISUAL PERCEPTION, CONTRAST, GRAPHS...
Fiber based lasers offer a number of attractive characteristics for space application: state of the art laser technology, leverage of design and reliability from the substantial investments of the telecon industry, and convenient redundancy of higher risk components through fiber splicing. At NASA/Goddard we are currently investigating three GFO fiber-based laser options: a fiber oscillator built in our laboratory; an effort to space qualify a commercial design that uses a proprietary high-gain...
Topics: NASA Technical Reports Server (NTRS), LIGHT SOURCES, FIBER LASERS, GRACE MISSION, MASS, LASER...
During the development of a delayed coincidence apparatus for the study of atomic decays, the need arose for a bright, fast, and inexpensive light source with known decay characteristics. A sample of P-15 phosphor was obtained for use as a calibration light source. A short pulse duration was employed to preferentially excite the short lifetime components relative to the longer-lived ones. The computer analysis revealed that the raw MCA decay curve data could be described well by a sum of three...
Topics: NASA Technical Reports Server (NTRS), CALIBRATING, COINCIDENCE CIRCUITS, DECAY, PHOSPHORS,...
In this project we investigated active, Si-compatible linear and nonlinear sources in plasmonic and metamaterials for high-density information processing. The objective of this two-year research program was to design and to engineer scalable, low-threshold, efficient light sources based on sub-wavelength mode confinement and nanoscale photonic-plasmonic coupling in active Si-based nanocavity structures and arrays for high-density integration and information processing. We have demonstrated...
Topics: DTIC Archive, Dal Negro,Luca, Trustees of Boston University Boston United States, LIGHT SOURCES,...
Management of fluorescent lights is recommended to (1) maintain uniformity of light intensity over time and (2) permit reproducibility of lighting conditions during experimental replications. At the McGill Phytotron, the lighting intensity can be controlled to desired level because any individual pair of the 40 lamps in each chamber can be set to be 'on' at any particular time. A lamp canopy service history is maintained for each experiment permitting accurate replication of lighting conditions...
Topics: NASA Technical Reports Server (NTRS), FLUORESCENCE, LIGHT SOURCES, LUMINOUS INTENSITY, PHYTOTRONS,...
The present invention provides a light direction sensor for determining the direction of a light source. The system includes an image sensor; a spacer attached to the image sensor, and a pattern mask attached to said spacer. The pattern mask has a slit pattern that as light passes through the slit pattern it casts a diffraction pattern onto the image sensor. The method operates by receiving a beam of light onto a patterned mask, wherein the patterned mask as a plurality of a slit segments....
Topics: NASA Technical Reports Server (NTRS), LIGHT SOURCES, DIFFRACTION PATTERNS, SLITS, SPACERS,...
12
12
Jul 10, 2020
07/20
by
Royston, Angela, 1945-
texts
eye 12
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30 pages : 27 cm
Topics: Light -- Experiments -- Juvenile literature, Torches -- Miscellanea -- Juvenile literature, Light...
313
313
May 27, 2011
05/11
by
Jeutter, Dean C
texts
eye 313
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This final report encapsulates the accomplishments of the third year of work on an Advanced Biotelemetry System (ABTS). Overall MU/ABTS project objectives are to provide a biotelemetry system that can collect data from and send commands to an implanted biotransceiver. This system will provide for studies of rodent development in space. The system must be capable of operating in a metal animal cage environment. An important goal is the development of a small, ''smart'', micropower, -channel data...
Topics: NITROGEN PLASMA, OSCILLATOR STRENGTHS, ABSORPTION SPECTRA, LINE SPECTRA, MOLECULAR OSCILLATORS,...
MOCAGH.ORG: Infocom: quarterstaff manual
Topics: quarterstaff, manual, character, objects, majic, characters, druid, maximar, kaern, computer, tree...
