右下腹疼痛挂什么科

A tracking, concentrating system delivers collimated sunlight to core building spaces or underground. Distributing optics illuminate large areas glare free. Supplemental electric lighting may be added for periods of inadequate solar availability.

The possibility of switching 100% from fossil fuel combustion to energy efficiency and renewable energy is examined, concluding that all the barriers once thought to be unlikely to happen are now being overcome by a combination of market forces, political action, and innovative technical and procedural changes.

Title page, other front matter, Table of Contents, and first page of the Introduction to this introductory textbook on radiometry and photometry

The spectral selectivity of glazing systems are being altered to enhance their performance. The sensitivity of these glazes to the angle of incidence and the shape of the incident solar spectrum was examined by a simulation program. As the spectral selectivity of the system increased, the solar heat gain coefficient, the fraction of solar radiant f...

Title & Contents of First Edition of Introduction to Radiometry and Photometry See also Second Edition 2014

The use of interior shades and venetian blinds, especially shades that are highly reflective on the side facing the glazing, can exert a significant control over the solar radiant heat gain from windows in buildings. That control can be increased even further if the shades or blinds are adjusted several times a day. A simplified mathematical model...

Florida Current oceanographic parameters are analyzed in a study of the feasibility of Ocean Thermal Energy Conversion (OTEC) plants located near the coast of Florida. Both the temperature differential and the mean flow required for an OTEC power installation are provided by the Current, which is also conveniently near a large-scale electric power...

Meter utilizes three optical systems to detect light scattered by particles in hydrosol at 2 deg and 90 deg simultaneously. Device has capability to detect relative amounts of organic and inorganic contaminants and, with proper calibration, to measure contribution of various species to changes in contamination levels in liquid mediums.

A scattering photometer for measuring the light scattered by particles in a hydrosol at substantially 2 deg and 90 deg simultaneously is described. Light from a source is directed by a first optical system into a scattering cell containing the hydrosol under study. Light scattered at substantially 90 deg to the incident beam is focused onto a first...

This paper contains a discussion of the requirements and approaches which can be taken in the development of techniques for the analysis of remote multispectral imagery of natural bodies of water. There are two general approaches which can be used in the analysis of multispectral water color data collected by aircraft or satellite remote sensors. W...

The basic features of the Ocean Thermal Energy Conversion (OTEC) project are described with regard to environmental impact and the potential of Gulf Stream resources for the construction of an OTEC plant. Categories of environmental considerations are outlined for both the plant itself and the related land-based construction and support facilities...

An instrument was designed and built that measures the light scattered at 2° and at 90° simultaneously. The instrument employs a laser source, solid‐state detectors, and a flow‐through scattering cell for laboratory use. A Mie theory computer program was used to calculate the theoretical volume‐scattering function for suspensions of latex spheres....

A technique has been developed for determining organic and inorganic particulate concentrations in natural waters, based upon measurements of the amount of light scattered in the forward direction and at right angles to an incident beam. The technique is well suited for continuous operation while a ship is underway at sea. For proper calibration of...

There are two general approaches which can be taken in the analysis of multispectral water color data collected by aircraft or satellite remote sensors. With the theoretical modeling approach, optically important constituents of natural waters are mathematically related to the upwelling radiance spectrum received by the remote sensor. With the empi...

An examination of a number of turbidity measurements reported in the literature reveals considerable variability in the definitions, units, and measurement techniques used. Many of these measurements differ radically in the optical quantity measured. The radiometric basis for each of the most common definitions of turbidity is examined. Several com...

The penetration depth of light in the sea is defined for remote sensing purposes as the depth above which 90% of the diffusely reflected irradiance (excluding specular reflectance) originates. It is demonstrated that for a homogeneous ocean, this is the depth at which the downwelling in-water irradiance falls to 1/e of its value at the surface. Pen...

There is obvious value in developing the means for measuring a number of subsurface oceanographic parameters using remotely sensed ocean color data. The first step in this effort should be the development of adequate theoretical models relating the desired oceanographic parameters to the upwelling radiances to be observed. A portion of a contributo...

An examination of a number of measurements of turbidity reported in the literature reveals considerable variability in the definitions, units, and measurement techniques used. Many of these measurements differ radically in the optical quantity measured. The radiometric basis for each of the most common definitions of turbidity is examined. Several...

An instrument was designed and built that measures the light scattered at several angles in the forward direction simultaneously. The instrument relies on an optical multiplexing technique for frequency encoding of the different channels suitable for detection by a single photodetector. A Mie theory computer program was used to calculate the theore...

The success of the effort to extract several subsurface oceanographic parameters from remotely sensed ocean color data will depend to a great extent upon the existence of adequate theoretical models relating the desired oceanographic parameters to the upwelling radiances to be observed.In order to guide the development of these models, and to check...

The application of pattern recognition to ocean color data analysis is considered. Due to weight, cost, and data transmission rate limitations, any mapping type remote sensor of ocean color must necessarily collect light from the sea in a finite number of channels. The optical properties of the sea are discussed together with the remote sensing of...

Following is a continuation of the list of titles and authors of the papers presented: Measurement of Spatial Motion Using Close-Range Analytical Photogrammetric Principles. By Frederick G. Lippert, III, Mushtaq Hussain and Sandor A. Veress. Mapping of Ship Waves Breaking on a Beach. By Francis H. Moffitt. Determacion de Areas por Pesada Analogica....

Thesis (M.S.)--University of Tennessee.

An experimental need for high sensitivity in an imaging interferometer for plasma diagnostics led us to the development of a new form of muitipass interferometer. The interferometer can be used to measure small changes in the figure of optical elements, or in the index of refraction of a sample of transparent material.

Scitation is the online home of leading journals and conference proceedings from AIP Publishing and AIP Member Societies

A multiple pass two-beam interferometer has been constructed with ten times the sensitivity of a single pass device. Typical applications include measurements of optical density in a gas or plasma sample, and determinations of small changes in figure of optical elements. Double exposure holography is employed to simplify the component requirements....

In order to reduce the confusion associated with many of the introductory treatments of photometry, it is suggested that initially the concepts of radiation transfer be introduced in terms of the more familiar units of radiometry. The conversion to photometric units can then be accomplished by a straightforward integration. The approach is illustra...

A new interferometer has been developed which is capable of direct interferometric comparison of an optic with itself. The original wavefront from the optic being tested is stored in a hologram for later comparison with the wavefront coming directly from the optic. The interferometer can perform this test even in the presence of large system aberra...

Bleaching holographic emulsions can provide significant increases in the brightness of the reconstructed image. By utilizing and enhancing thickness variations in the relief image of holograms to create phase variations and by removing the metallic silver of the image, not only can the overall transmittance of the hologram be increased but the amou...

An increase in laser cavity length, in order to increase power output, draws additional axial modes of oscillation into the Doppler-broadened envelope of laser emission. The presence of more than one of these modes in the output introduces a periodicity into the function of fringe visibility versus optical path difference. As the number of these mo...

Five potentially applicable techniques of interferometric testing. with holography are discussed in the attachment. The configurations for each technique are shown at the end of this report.