Luminance is defined by where L is the luminance (cd/m2), F is the luminous flux or luminous power (lm), θ is the angle between the surface normal and the specified direction, A is the area of the source (m2), and Ω is the solid angle (sr). ...

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Luminance, Luminance - Definition

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Luminous energy, Luminous energy - Units

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Luminous flux is often used as an objective measure of the useful power emitted by a light source, and is typically reported on the packaging for light bulbs, although it is not always prominent. Energy conscious consumers commonly compare the luminous flux of different light bulbs, since it provides an estimate of the apparent amount of light the bulb will produce, and is useful even when comparing different technologies, such as incandescent and compact fluorescent bulbs. For example, a typical 100 watt incandescent light bulb emits a ...

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Luminous flux, Luminous flux - Units, Luminous flux - Weighting, Luminous flux - Contexts

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UFO's Dream Symbols:

(Source: Myths - Dreams - Symbols)

Related pages: Dream Symbols, Dream Interpretation, Dream Symbol UFO, Dream Dictionary UFO, Meaning of dreams about UFO, Dream Interpretation UFO, Dream Analysis UFO, Dreaming of UFO

UFO, Flying saucers, Circular, Luminous, Superior, UFO

Chakras: Sahasrara Chakra

The seventh or crown chakra, sahasrara is of such a spiritual nature that restrictions of time, space, and mortality are completely transcended. Sahasrara is the thousand-petaled lotus of holy effulgence, experienced as the light of ten million suns; "like mercury light kept in a vessel of silver. The thousands of convolutions of the brain appear like the luminous petals of a lotus," says the inwardly sighted yogi Vyas Dev.

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Brightness is an attribute of visual perception in which a source appears to emit a given amount of light. In other words, brightness is the perception elicited by the luminance of a visual target. "Brightness" was formerly used as a synonym for the photometric term luminance and (incorrectly) for the radiometric term radiance. According to Federal Standard 1037C, "brightness" should now be used only for nonquantitative references to physiological sensations and perceptions of light. Note, that the same target luminance can elicit different perceptions of brightness in different contexts. (See, e.g. ...

Including:

Brightness - Helping links

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The YUV model defines a color space in terms of one luminance and two chrominance components. YUV is used in the PAL and NTSC systems of television broadcasting, which is the standard in much of the world. YUV models human perception of color more closely than the standard RGB model used in computer graphics hardware, but not as closely as the HSV color space. Y stands for the luminance component (the brightness) and U and V are the chrominance (color) components. The YCbCr or YPbPr color space, used in component video, ...

Including:

YUV - Luminance/chrominance systems in general YUV - Types of sampling

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A coronary catheterization is a minimally invasive procedure to access the coronary circulation and blood filled chambers of the heart using a catheter. It is performed for both diagnostic and interventional (treatment) purposes. Coronary catheterization is one of the several Cardiology diagnostic tests and procedures. Specifically, coronary catheterization is a visually interpreted test performed to recognize occlusion, stenosis, restenosis, thrombosis or aneurysmal enlargement the coronary artery lumens, heart chamber size, h ...

Including:

Coronary catheterization - History Coronary catheterization - Patient participation Coronary catheterization - Equipment Coronary catheterization - Diagnostic Procedure Description Coronary catheterization - Catheterization to physically treat luminal disease Coronary catheterization - Advances in catheter based physical treatments

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The Rosary (from Latin rosarium, "crown of roses"), an important and traditional devotion of the Catholic Church consisting of a set of prayer beads and a system of set prayers. The Rosary is sometimes used by High Church Protestants including, but not limited to, Anglicans, Episcopalians, Lutherans and Methodists. It combines prayer and meditation centered around sequences of reciting the Lord's Prayer followed by ten recitations of the "Hail Mary" prayer; one such sequence is known as a decade. A complete Rosary involves the completion of all decades, ...

Including:

Rosary - Origins of the Rosary Rosary - Rosary beads Rosary - The Mysteries
Rosary - Joyful Rosary - Luminous optional Rosary - Sorrowful Rosary - Glorious
Rosary - Days of recitation Rosary - Types of Rosaries
Rosary - One frequently used form Rosary - A regularly used alternative
Rosary - Single-decade Rosaries Rosary - Rosaries in other faiths Rosary - Rosaries worn outside of religion

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Crohn's disease is a chronic inflammatory disease of the digestive tract and it can involve any part of it, from the mouth to the anus. It typically affects the caecum and/or the terminal ileum as well as demarcated areas of large bowel, with other areas of the bowel being relatively unaffected. It is often associated with auto-immune disorders outside the bowel, such as aphthous stomatitis and rheumatoid arthritis. Crohn's disease should not be confused with a non-progressive and non-degenerative digestive disorder called irri ...

Including:

Crohn's disease - Symptoms Crohn's disease - Epidemiology Crohn's disease - Causes
Crohn's disease - Barrier problem and autoimmunity to the luminal flora Crohn's disease - Anti-Saccharomyces cerevisiae Antibodies ASCA IgG and IgA Crohn's disease - Anti-Neutrophil Cytoplasmic Antibodies ANCA IgG Crohn's disease - OmpC IgA Crohn's disease - Mycobacterial infection
Crohn's disease - Complications
Crohn's disease - Short-term Crohn's disease - Long-term risks
Crohn's disease - Treatment
Crohn's disease - Medication Crohn's disease - Surgery Crohn's disease - Dietary Crohn's disease - Helminthic therapy Current research
Crohn's disease - Differential diagnosis Crohn's disease - History and name

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Daqin Pagoda (大秦塔) in Zhouzhi, Shaanxi Province, China is the remnant of the earliest surviving Christian church in China. The church and the monastery were built in 640 by members of the Assyrian Church of the East, also referred to as the Nestorian church. Daqin is the name for the Roman Empire in the Chinese language of the time. Daqin Pagoda - History. Persecution of Christians in China led to the abandonment of Daqin in about 845. Much later, in 1300, a Buddhist temple was installe ...

Including:

Daqin Pagoda - History Daqin Pagoda - The pagoda today

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The candela (symbol: cd) is the SI base unit of luminous intensity. Candela - Definition. The candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540×1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. Candela - Origin. The candela was based on an older unit, the candlepower, which was referenced to the luminous intensity of a "standard candle" of kno ...

Including:

Candela - Definition Candela - Origin Candela - Explanation Candela - SI photometric light units Candela - Reference

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A candle is a light source usually consisting of an internal wick which rises through the center of a column of solid fuel. Typically the fuel is some form of wax - paraffin wax being the most common. However in recent years new soy and vegetable candles have become popular. Prior to the candle being ignited, the wick is saturated with the fuel in its solid form. The heat of the match or other flame being used to light the candle first melts and then vaporizes a small amount of the fuel. Once vaporized, the fuel combines with o ...

Including:

Candle - Usage
Candle - Religion Candle - Measurement
Candle - Fuel and candle holders Candle - Hazards

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Definition and meaning of luminous:

luminous - emitting light.

(Source: US National Oceanic and Atmospheric Administration (NOAA) )

Also see these pages: Oceanography, Oceanography Sitemap, Coral Reef, Environment, Sustainability, Climate Change,

An aureola or aureole (diminutive of Latin aura, "air") is the radiance of luminous cloud which, in paintings of sacred personages, surrounds the whole figure. In the earliest periods of Christian art this splendour was confined to the figures of the persons of the Christian Godhead, but it was afterwards extended to the Virgin Mary and to several of the saints. The aureola, when enveloping the whole body, generally appears oval or elliptical in form, but occasionally circular or quatrefoil. When it appears merely ...

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Vibrio harveyi is a species of marine bioluminescent vibrio species almost ecologically identical to Vibrio fischeri. See that article for a more in detail analysis of its role in the environment and in symbiosis with marine life. V. harveyi may be a more common cause of luminous vibriosis in commercially farmed marine invertebrates. Other related archivesVibrio fischeri, bioluminescent, farmed, invertebrates, symbiosis

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The primary advantages of luminance/chrominance systems such as YUV, and its relatives YIQ and YDbDr, are that they remain compatible with black and white analog television (largely due to the work of Georges Valensi). The Y channel saves nearly all the data recorded by black and white cameras, so it produces a signal suitable for playback on old monochrome displays. In this case, the U and V are simply discarded. If displaying color, all three cha ...

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YUV, YUV - Luminance/chrominance systems in general, YUV - Types of sampling

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By changing the diagnostic catheter to a guiding catheter, physicians can also pass a variety of instruments through the catheter and into the artery to a lesion site. The most commonly used are 0.014 inch diameter guide wires and the balloon dilation catheters, see angioplasty. By injecting radiocontrast agent through a tiny passage extending down the balloon catheter and into the balloon, the balloon is progressively expanded. The hydraulic pressures are chosen and applied by the physician, according to how the balloon within the st ...

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Coronary catheterization, Coronary catheterization - History, Coronary catheterization - Patient participation, Coronary catheterization - Equipment, Coronary catheterization - Diagnostic Procedure Description, Coronary catheterization - Catheterization to physically treat luminal disease, Coronary catheterization - Advances in catheter based physical treatments

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The names of the various quantities are somewhat confusing. The term intensity refers strictly to the amount of light that is emitted per unit of time and per unit of surface, in units of lux. Note, however, that in many fields of science this quantity is called luminous emittance, as opposed to luminous intensity, which is a different quantity. Luminance, can mean several things even within the context of video: Luminance is the apparent brightness of an object, taking into account the wavelength-dependent sensiti ...

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Gamma correction, Gamma correction - Terminology, Gamma correction - A simple monitor test

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There are two parallel systems of quantities known as photometric and radiometric quantities. Every quantity in one system has an analogous quantity in the other system. Some examples of parallel quantities include: Luminance (photometric) and radiance (radiometric) Luminous flux (photometric) and radiant flux (radiometric) Luminous intensity (photometric) and radiant intensity (radiometric) In photometric quantities every wavelength is weighted according to how visible it is, while radiometric qu ...

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Photometry optics, Photometry optics - Photometric vs. radiometric quantities, Photometry optics - Watts radiant flux vs. lumens luminous flux, Photometry optics - Luminance, Photometry optics - Illuminance

Read more here: » Photometry optics: Encyclopedia II - Photometry optics - Photometric vs. radiometric quantities