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Topic: Gamma

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In the News (Tue 21 May 19)

  Custom vinyl and fabric banners, digital prints and conventional photography.
Gamma is a leading provider of graphic imaging services.
Gamma designs and prints fabric banners on a wide range of coated textiles and poly woven cloths.
In the field of fine art reproduction, Gamma's technical expertise and insistence on quality have made us the giclee printing supplier of choice for artists, galleries, museums and collectors around the world.
www.gammaphoto.com   (296 words)

  Gamma Rays | Radiation Protection Program | US EPA   (Site not responding. Last check: 2007-11-07)
Gamma rays (gamma photons) are emitted from the nucleus of some unstable (radioactive) atoms.
A large portion of gamma radiation largely passes through the body without interacting with tissue--the body is mostly empty space at the atomic level and gamma rays are vanishingly small in size.
Gamma rays can ionize atoms in tissue directly or cause what are known as "secondary ionizations." Ionizations are caused when energy is transferred from gamma rays to atomic particles such as electrons (which are essentially the same as beta particles).
www.epa.gov /radiation/understand/gamma.htm   (1445 words)

Gamma rays can be produced in labs through the process of nuclear collision and also through the artificial radioactivity that accompanies these interactions.
Gamma rays are used in medicine to kill and treat certain types of cancers and tumors.
Gamma rays are a form of electromagnetic radiation similar to x-rays.
www.smgaels.org /physics/gamm_1.htm   (512 words)

 The Gamma Satellite
The Gamma observatory was a Soviet-based spacecraft launched on 11 July 1990.
The Gamma-1 telescope was the principle instrument aboard the Gamma observatory.
Studies were made of the Vela pulsar, the galactic center region, the Cygnus binaries, the Heming gamma source in Taurus, and Her X-1.
heasarc.gsfc.nasa.gov /docs/heasarc/missions/gamma.html   (394 words)

 ::Go Greek::   (Site not responding. Last check: 2007-11-07)
Gamma Phi Beta was the first true sorority because it was started by all women, as opposed to female fraternities which were founded by men.
Gamma Phi’s are women more than willing to reach out to the community and frequently participate in activities that raise money for foundations such as The Cystic Fibrosis Foundation and Badger Camp, a camp for physically and mentally disabled children.
The mark of a true Gamma Phi is found in the sister who strives to promote the highest type of womanhood and possesses the desire to build upon the strong foundations of the sorority through academics, extra-curricular activities, community service and Greek involvement.
www.uwgreek.com /sorority/sororities/gamma_phi_beta.html   (386 words)

 gamma   (Site not responding. Last check: 2007-11-07)
The gamma ray is identical in nature to light or microwaves, but of very high energy.
Gamma rays interact with material by colliding with the electrons in the shells of atoms.
It is important to note that most alpha and beta emitters also emit gamma rays as part of their decay process.
www.physics.isu.edu /radinf/gamma.htm   (188 words)

 Graphics Lab About gamma correction
Gamma correction consists of applying the inverse of this relationship to the image before display, i.e.
For example, if your browser is Netscape Communicator, your image viewer is xv, and the gamma of your display monitor is 2.0, then you can ask xv to apply gamma correction as it displays an image by changing the invoking command in Netscape to "image/*; xv -gamma 2.0 %s".
This is called the system gamma, and it is intended to compensate for the fact that the images you are viewing typically represent brightly illuminated scenes, but you typically viewing them while seated in a dimly illuminated room, which changes the transfer characteristics of your eye.
graphics.stanford.edu /gamma.html   (1094 words)

 Gamma Knife Center - University of Maryland Medicine
Gamma Knife radiosurgery is recognized world-wide as the preferred treatment for metastatic brain tumors and has proven effective for certain primary brain tumors and arteriovenous malformations.
The Gamma Knife removes the physical trauma and the majority of risks associated with open surgery.
Because Gamma Knife treatment is so effective, it is recognized and covered by the majority of insurance plans.
www.umm.edu /gammaknife   (330 words)

 The Gamma adjustment page
Basically, gamma is the relationship between the brightness of a pixel as it appears on the screen, and the numerical value of that pixel.
Away from the target gamma the colour of the inner squares shift away from neutral grey, assuming red/cyan, green/magenta, and blue/yellow hues.
The end result is a gamma setting of anywhere between 1.2 and 1.8, depending on the quality of your monitor hardware and the resolution it's set to.
www.photoscientia.co.uk /Gamma.htm   (1629 words)

 Gamma-ray Burst FAQ   (Site not responding. Last check: 2007-11-07)
Gamma ray bursts (GRBs for short) are intense and short (approximately 0.1-100 seconds long) bursts of gamma-ray radiation that occur all over the sky approximately once per day at very large distances from Earth.
Gamma rays are very energetic photons (E>10^5 eV), which represent the most extreme portion of the electromagnetic spectrum (ranging from radio waves at the lowest energies through visible optical light at higher energies, to gamma rays at the highest energies).
If there is more than one gamma ray burst on the same day, the letter a, b, c, etc. are added to the name (for example, the second gamma ray burst on July 4, 1999 is called GRB 990704b).
www.astro.caltech.edu /~ejb/faq.html   (2713 words)

 Gamma Knife at University of Pittsburgh
Gamma Knife surgery represents one of the most advanced means available to manage brain tumors; arteriovenous malformations and pain or movement disorders.
The Gamma Knife has proved effective for thousands of patients with benign or malignant brain tumors, vascular malformations, pain or other functional problems.
UPMC Presbyterian is a major teaching center for Gamma Knife radiosurgery as neurosurgeons, radiation oncologists and medical physicists from around the world come here to train.
www.neurosurgery.pitt.edu /imageguided/gammaknife   (617 words)

 Monitor calibration and gamma
For photographic film and paper, gamma is defined at the average slope of the response curve in its linear region.
The left portion, which consists of my gamma chart, is used to calibrate gamma and to adjust fl level, which interacts with gamma.
The number in the Gamma box increases as displayed gamma (on the chart) decreases: it indicates the monitor's native (uncorrected) gamma when the monitor is corrected to display gamma = 2.2.
www.normankoren.com /makingfineprints1A.html   (5341 words)

 Gamma Correction and Precision Color (PNG: The Definitive Guide)
Thus, while the default Macintosh ``gamma'' of 1.8 appears close to SGI's default of 1.7, the actual lookup table exponents corresponding to these defaults are 1.8/2.61 and 1/1.7, respectively.
Adjusting the overall brightness of an image via gamma correction is a good first step, but it does not address the issue of color balance.
Because the sRGB color space encompasses gamma and chromaticity information, it is not strictly necessary for a PNG image to include gAMA and cHRM chunks in addition to the sRGB chunk.
www.libpng.org /pub/png/book/chapter10.html   (5923 words)

 PNG Specification: Gamma Tutorial   (Site not responding. Last check: 2007-11-07)
There are various images around that purport to measure gamma, usually by comparing the intensity of an area containing alternating white and fl with a series of areas of continuous gray of different intensity.
When the resulting image is displayed on a CRT with a gamma of 2.5, the image on screen ends up with a gamma of about 1.25 relative to the original scene, which is appropriate for "dim surround" viewing.
The gamma of the table is actually the reciprocal of the number that "gamma" prints, and it does not include the CRT gamma.
www.w3.org /TR/PNG-GammaAppendix   (2825 words)

 Sigma Gamma Rho Sorority, Inc.
It is a pleasure to welcome all sorors, affiliates and visitors to the official website of Sigma Gamma Rho Sorority, Inc. The international website provides exciting information about events, new partnerships, national programs and the history of the organization.
Since its founding in 1922, Sigma Gamma Rho Sorority has exemplified sisterhood, scholarship and service through all of our community endeavors.
We invite you to visit the international website often to stay in touch with what is happening in Sigma Gamma Rho Sorority.
www.sgrho1922.org   (248 words) Gamma Distribution
Since the general form of probability functions can be expressed in terms of the standard distribution, all subsequent formulas in this section are given for the standard form of the function.
The formula for the percent point function of the gamma distribution does not exist in a simple closed form.
The gamma inverse survival function does not exist in simple closed form.
www.itl.nist.gov /div898/handbook/eda/section3/eda366b.htm   (356 words)

 Gamma: Digital Imaging: Glossary: Learn: Digital Photography Review
When unadjusted, most CRT monitors have a "gamma" of 2.5 which means that pixels with a brightness of 0.5, will be displayed with a brightness of only 0.18 (0.5^2.5) in non-colormanaged applications (*).
Calibration via software and/or hardware ensures that the monitor outputs the image based on a predetermined gamma curve, typically 2.2 for Windows, which is approximately the inverse of the response of the human vision.
The sRGB and Adobe RGB color spaces are also based on a gamma of 2.2.
www.dpreview.com /learn/?/Glossary/Digital_Imaging/Gamma_01.htm   (271 words)

Most gamma rays are somewhat higher in energy than x-rays and therefore are very penetrating.
An example of this pattern is seen with silver isotopes, with two stable isotopes plus one of lower mass which decays by electron capture and one of heavier mass which decays by beta emission.
The radiation was classified by E. Rutherford as alpha, beta, and gamma rays according to their ability to penetrate matter and ionize air.
hyperphysics.phy-astr.gsu.edu /hbase/nuclear/radact2.html   (628 words)

GAMMA is a C++ library expressly for simulation of Magnetic Resonance experiments.
The OOP premise of GAMMA is not sacrificed in PyGAMMA.
With the changeover to GCC 3 and Boost.Python V2 the all of PyGAMMA was rewritten by Dr. Smith.
gamma.ethz.ch   (258 words)

 GAMMA: The Genoa Active Message MAchine
GAMMA uses IP to spawn the processes of a parallel job, so the additional LAN is really necessary.
GAMMA is not particularly efficient in recovering from packet losses; indeed, we argue that the probability of a packet loss due to a hardware error is negligible, and the possibility of loosing packets due to LAN congestion is better managed by preventing congestion from occurring (for instance, by using smart communication patterns in parallel jobs).
In other words, GAMMA does provide packet retransmission because it is of great help indeed, but does not take care of efficiency when retransmission occurs because this is supposed to be (made) rare.
www.disi.unige.it /project/gamma   (1524 words)

The technical explanations of gamma are irrelevant here — the visual effect of changing gamma values is easy to see.
Gamma considerations are particularly important if you are displaying images with very long gray scales (such as medical diagnostic images and fine fl-and-white photography) or images in which the exact color values are critical (such as works of art and clinical medical photographs):
The default gamma settings for Macintosh (1.8 target gamma) and Windows (2.2 target gamma) monitors are quite different, and this can lead to unpleasant surprises when you first see your images displayed on "the other" platform.
www.webstyleguide.com /graphics/gamma.html   (220 words)

 Neuroscience: Gamma Knife Surgery in Michigan - MidMichigan Health
Together, the gamma beams (201 in all) converge to produce a high dose of radiation at the exact site of the lesion.
Thus, the Gamma Knife "cuts" deep into the brain without using a scalpel at all (See detailed drawing, PDF 271KB).
Gamma Knife patients generally require no general anesthesia, and because it is noninvasive, there is negligible risk of infection or hemorrhage.
www.midmichigan.org /consumer/page.asp?OrgID=BF4ECA07F3B4416DB435BED5F9B0685A&id=98164C11EAB6476A9A1B995D5D0BEEEF&s=4&sName=0   (660 words)

 Milwaukee GAMMA, Inc. - An Organization for the Gay, Lesbian, Bisexual & Transgender Communities of Southeastern ...
GAMMA is blessed with volunteer members who are willing to give of their time and energy to orchestrate all this stuff.
GAMMA has been a success because it continues to attract the kind of people who want to share their fun with others, and who are willing to do what it takes to make things happen.
Most of the events are open to non-members who wish to find out what GAMMA is all about - simply call or use our Contact Page for more information.
www.milwaukeegamma.com   (1185 words)

 Fixing Gamma - photo.net
use their command cg14config -g _gammavalue_ to setup a gamma lookup table (in the SX aka cg14 hardware) for the gamma you give, or use cg14config -U _filename_ to load your table with whatever (8-bit) values you want for each of the 256 non-negative integer intensities.
Oh, their 3D hardware called ZX (or sometimes called leo), they have the command leoconfig -G _gamma_value_ to setup this hardware with whatever gamma value you want.
You mention Knoll's GAMMA in the MAC discussion and it's included in the PC version (although there's a bug which makes it seem like the utility doesn't work-it does, it just doesn't look like it's storing user settings..
www.photo.net /photo/fixing-gamma.html   (498 words)

 Gamma Knife Surgery Now Offered To Children - Health
Gamma Knife surgery is a state of the art system that allows brain surgery to be done without any cutting at all.
Natasha Banner is the youngest child treated with Gamma Knife at Washington Hospital Center.
Doctors said that because of the way gamma knife works, it can take several months or even a few years to determine if the procedure was successful.
www.nbc4.com /health/9246762/detail.html   (458 words)

 Gamma Knife / The Established Standard of Care
are the beams of gamma radiation programmed to target the lesion at the point where they intersect.
In a single treatment session, 201 beams of gamma radiation focus precisely on the lesion.
In addition to the above mentioned indications, functional disorders such as intractable pain, Parkinson's disease, essential tremors and epilepsy are often treated with Gamma Knife
www.irsa.org /gamma_knife.html   (665 words)

 CGRO Science Support Center
The Compton Gamma Ray Observatory was the second of NASA's Great Observatories.
Compton, at 17 tons, was the heaviest astrophysical payload ever flown at the time of its launch on April 5, 1991 aboard the space shuttle Atlantis.
For each of the instruments, an improvement in sensitivity of better than a factor of ten was realized over previous missions.
cossc.gsfc.nasa.gov   (204 words)

 Gamma FAQ - Abstract
Having a good understanding of the theory and practice of gamma will enable you to get good results when you create, process and display pictures.
You may be interested in the companion Frequently-questioned answers about gamma, the GammaFQA.
If you think gamma has a bad reputation, read about The rehabilitation of gamma.
www.poynton.com /GammaFAQ.html   (161 words)

 Gamma Bros - Miniclip Games - Play Free Games
The Gamma Brothers spend their days working in a huge space station near jupiter.
After all, it is dinner time on earth, and the Gamma Brothers families will not be pleased if you don't get Buzz and Zap home safely.
There are 3 different ways of posting Gamma Bros to your blog or website.
www.miniclip.com /games/gamma-bros/en   (335 words)

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