The gray (symbol: Gy) is the SI derived unit of absorbed dose, specific energy (imparted) and of kerma. Such energies are typically associated with ionising radiation such as X-rays or gamma particles or with other nuclear particles. It is defined as the absorption of one joule of such energy by one kilogram of matter (usually human tissue).^[1]

The gray was named after the British physicist Louis Harold Gray, a pioneer in the field of measurement of radium radiation and X-rays and their effects on living tissue,^[2] and was adopted as part of SI by the 15th CGPM in 1975. The SI unit replaces the traditional cgs unit, the rad (equivalent to 0.01 Gy), which remains common in industry in the United States, while "strongly discouraged" in the style guide for U.S. National Institute of Standards and Technology authors.^[3]

Definition[link]

One gray is the absorption of one joule of energy, in the form of ionizing radiation, per kilogram of matter.

Failed to parse (Missing texvc executable; please see math/README to configure.): 1 \ \mathrm{Gy} = 1\ \frac{\mathrm{J}}{\mathrm{kg}} = 1\ \mathrm{m}^2\cdot\mathrm{s}^{-2}

For xrays and gamma rays, these are the same units as the sievert (Sv). For alpha particles one gray is twenty sievert. To avoid any risk of confusion between the absorbed dose (by matter) and the equivalent dose (by biological tissues), one must use the corresponding special units, gray is used instead of the joule per kilogram for absorbed dose and the sievert instead of the joule per kilogram for the dose equivalent. The word "gray" is both the singular and plural spelling.

The gray was defined in 1975 in honour of Louis Harold Gray (1905–1965) who, in 1940, first proposed a similar concept, "that amount of neutron radiation which produces an increment of energy in unit volume of tissue equal to the increment of energy produced in unit volume of water by one röntgen of radiation".^[4]

This SI unit is named after Louis Harold Gray. As with every International System of Units (SI) unit whose name is derived from the proper name of a person, the first letter of its symbol is upper case (Gy). When an SI unit is spelled out in English, it should always begin with a lower case letter (gray), except where any word would be capitalized, such as at the beginning of a sentence or in capitalized material such as a title. Note that "degree Celsius" conforms to this rule because the "d" is lowercase. —Based on The International System of Units, section 5.2.

Effect on the body[link]

The gray measures the absorbed energy of radiation. The biological effects vary by the type and energy of the radiation and the organism and tissues involved. The sievert, which has the same dimensions as the gray is a measure of the potential for damage to human tissue.^[5] It is related to the gray by the relationship

Failed to parse (Missing texvc executable; please see math/README to configure.): H = QD

where H is the equivalent absorbed dose (measured in sieverts), D the absorbed dose (measured in grays) and Q the quality factor, a dimensionless quantity whose value is dependent on the type of radiation in question, ranging from 1 in the case of gamma particles and X-rays to 20 in the case of alpha particles.^[6]

A whole-body exposure to 5 or more gray of high-energy radiation at one time usually leads to death within 14 days. This dosage represents 375 joules for a 75 kg adult (equivalent to the chemical energy in 20 mg of sugar). Since gray are such large amounts of radiation, medical use of radiation is typically measured in milligray (mGy).

As experienced from follow-up after radiation therapy, epilation may occur on any hair-bearing skin with doses above 1 Gy. It occurs only within the radiation field/s. Hair loss may be permanent with a single dose of 10 Gy, but if the dose is fractionated permanent hair loss may not occur until dose exceeds 45 Gy. The salivary glands and tear glands have a radiation tolerance of about 30 Gy in 2 Gy fractions, a dose which is exceeded by most radical head and neck cancer treatments, potentially causing dryness. Dry mouth (xerostomia) and dry eyes (xerophthalmia) can become irritating long-term problems and severely reduce the patient's quality of life. Similarly, sweat glands in treated skin (such as the armpit) tend to stop working, and the naturally moist vaginal mucosa is often dry following pelvic irradiation.

Dangerously high doses of radiation received by a fetus during the first trimester primarily affect its heart and limbs, while later in pregnancy the brain is the major affected site.^[7]

Dose by source[link]

In radiation therapy, the amount of radiation varies depending on the type and stage of cancer being treated. For curative cases, the typical dose for a solid epithelial tumor ranges from 60 to 80 Gy, while lymphomas are treated with 20 to 40 Gy. Preventive (adjuvant) doses are typically around 45–60 Gy in 1.8–2 Gy fractions (for breast, head, and neck cancers).

The average radiation dose from an abdominal X-ray is 1.4 mGy, that from an abdominal CT scan is 8.0 mGy, that from a pelvic CT scan is 25 mGy, and that from a selective CT scan of the abdomen and the pelvis is 30 mGy.^[8]

Leading up to the gray[link]

The adoption of the gray by the 15th CGPM in 1975 as the unit of measure of the absorption of ionising radiation, specific energy absorption and of kerma in 1975^[9] was the cumulation of over half a century of work, both in the understanding of the nature of ionising radiation and in the refinement of measuring techniques.

Wilhelm Röntgen first discovered X-Rays in 1896 and within a few years they were being used to examine broken bones. One of the earliest techniques of measuring the intensity of X-Rays was to measure their ionisation potential in air. Initially various countries developed their own standards, but in order to promote international cooperation, the First International Congress of Radiology (ICR) which met in London in 1925 proposed a separate body to consider units of measure. This body, the International Commission on Radiation Units and Measurements (ICRU),^{[Note 1]} came into being at the Second ICR in Stockholm in 1928 under the chairmanship Manne Siegbahn^{[10][11][Note 2]} and at their first meeting proposed that one unit X-Ray dose should be defined as the quantity of X-rays that would produce one esu of charge in one cubic centimetre of dry air at 0 °C and a standard atmosphere. This unit was named the roentgen in honour of Röntgen who had died five years previously. At the 1937 meeting of the ICRU, this definition was extended to apply to gamma radiation as well as X-Rays.^[12] This technique, although appropriate for the technology of the day, had the disadvantage that it was not a direct measure of either the intensity X-rays or of their absorption, but rather was a measurement of the effect of the X-Rays in a specific circumstance.^[13]

In 1940, Gray, who had been studying the effect of neutron damage on human tissue, together with Mayneord and Read published a paper in which a unit of measure, dubbed the "gram roentgen" (symbol: gr) defined as "that amount of neutron radiation which produces an increment in energy in unit volume of tissue equal to the increment of energy produced in unit volume of water by one roentgen of radiation"^[4] was proposed. This unit was found to be equivalent to 88 ergs in air. In 1953 the ICRU recommended the rad, equal to 100 erg/g as the new unit of measure of absorbed radiation. The rad was expressed in coherent cgs units.^[12]

In the late 1950's the ICRU was invited by the CGPM to join other scientific bodies to work with the International Committee for Weights and Measures (CIPM) in the development of a system of units that could be used consistently over many disciplines. This body, initially known as the "Commission for the System of Units" (renamed in 1964 as the "Consultative Committee for Units") was responsible overseeing the development of the International System of Units (SI).^[14] At the same time it was becoming increasingly obvious that the definition of the roentgen was unsound and many calls were made for its redefinition. In 1962 it was redefined.^[15] The definition of the roentgen had the advantage over the gray of being simpler to measure, but the gray is independent of the primary ionising radiation^[16]

The CCU decided to define the SI unit of absorbed radiation in terms of energy per unit mass, which in MKS units was J/kg. This was confirmed in 1975 by 15th GCPM and the unit was named the "gray" in honour of Hal Gray who had died in 1965. The gray was exactly equal to 100 rad.

Notes[link]

See also[link]

• Dose area product (Gy·cm²)
• International System of Units base units
• SI derived unit
• Orders of magnitude (radiation)
• Roentgen equivalent man
• Rad (unit)
• Sievert, SI derived unit of dose equivalent radiation

References[link]

1. ^ "The International System of Units (SI)". Bureau International des Poids et Mesures (BIPM). http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf. Retrieved 2010-01-31. 
2. ^ "Rays instead of scalpels". LH Gray Memorial Trust. 2002. http://www.lhgraytrust.org/lhgraybiography.html. Retrieved 15 May 2012. 
3. ^ "NIST Guide to SI Units - Units temporarily accepted for use with the SI". http://physics.nist.gov/Pubs/SP811/sec05.html#5.2. 
4. ^ ^{a b} Gupta, S. V. (2009-11-19). "Louis Harold Gray". Units of Measurement: Past, Present and Future : International System of Units. Springer. p. 144. ISBN 978-3-642-00737-8. http://books.google.com/books?id=pHiKycrLmEQC&pg=PA144. Retrieved 2012-05-14. 
5. ^ "Conversion Table: Energy". Electropedia. Battery and Energy Technologies. http://www.mpoweruk.com/conversion_table.htm. Retrieved 15 May 2012. 
6. ^ "Measures Relative to the Biological Effect of Radiation Exposure". NDT Test Center. http://www.ndt-ed.org/EducationResources/CommunityCollege/RadiationSafety/quan_units/units.htm. Retrieved 15 May 2012. 
7. ^ medscape.com >What Risk Dose X-Ray Pose to Fetus? From USMLEasy from McGraw-Hill. Posted: 09/16/2010.
8. ^ Baden, Jeffrey M.; Jay B. Brodsky (1985). The Pregnant surgical patient. London: Futura. ISBN 0-87993-238-4. ^{[page needed]}
9. ^ International Bureau of Weights and Measures (2006), The International System of Units (SI) (8th ed.), p. 157, ISBN 92-822-2213-6, http://www.bipm.org/utils/common/pdf/si_brochure_8_en.pdf 
10. ^ Siegbahn, Manne; et al (October 1929). "Recommendations of the International X-Ray Unit Committee". Radiology 13 (4): 372-373. DOI:10.1148/13.4.372. http://radiology.rsna.org/content/13/4/372.full.pdf. Retrieved 20 May 2012. 
11. ^ "About ICRU - History". International Commission on Radiation Units & Measures. http://www.icru.org/index.php?option=com_content&task=view&id=25&Itemid=63. Retrieved 20 May 2012. 
12. ^ ^{a b} Guill, JH; Moteff, John (June 1960). "Dosimetry in Europe and the USSR". Third Pacific Area Meeting Papers - Materials in Nuclear Applications - American Society Technical Publication No 276. Symposium on Radiation Effects and Dosimetry - Third Pacific Area Meeting American Society for Testing Materials, October 1959, San Francisco, 12-16 October 1959. Baltimore: ASTM International. p. 64. LCCN 60-14734. http://books.google.co.uk/books?id=czTi4G6-Hq8C&pg=PA63&lpg=PA63&dq=roentgen+redefinition&source=bl&ots=Ha5UORUMvK&sig=2InfcxgNMCdnKBsJw9JMWDmrn0Y&hl=de&sa=X&ei=X3CyT7-ENabP4QTA0dyLCQ&ved=0CGMQ6AEwBA#v=onepage&q=roentgen%20redefinition&f=false. Retrieved 15 May 2012. 
13. ^ Lovell, S (1979). An introduction to Radiation Dosimetry. Cambridge, United Kingdom: Cambridge University Press. pp. 52 - 64. ISBN 0 521 22436 5. http://books.google.de/books?id=lK48AAAAIAAJ&pg=PA56&lpg=PA56&dq=roentgen+defined&source=bl&ots=DGneAMV5Ea&sig=a4ra-zQGp4-49WMn1sxb_IU0YA8&hl=de&sa=X&ei=AlmyT6KAOpPT4QT8soyOCQ&ved=0CHYQ6AEwCQ#v=onepage&q=roentgen%20defined&f=false. Retrieved 15 May 2012. 
14. ^ "CCU: Consultative Committee for Units". International Bureau of Weights and Measures (BIPM). http://www.bipm.org/en/committees/cc/ccu/. Retrieved 18 May 2012. 
15. ^ Anderson, Pauline C. The Dental Assistant (7th ed.). Albany, NY: Delmar. p. 554. ISBN 0-7668-1113-1. http://books.google.co.uk/books?id=IEhJpyEBKYIC&pg=PA554&lpg=PA554&dq=roentgen+1925+1937+1962+ionisation&source=bl&ots=ZKipzcuUUn&sig=l0kKmjEJ6Fud-rBDvsTnY8AVChg&hl=en&sa=X&ei=acG2T_b1G8TFtAbVsJGaCA&sqi=2&ved=0CE8Q6AEwAw#v=onepage&q=roentgen%201925%201937%201962%20ionisation&f=false. 
16. ^ Lovell, S (1979). An introduction to Radiation Dosimetry. Cambridge, United Kingdom: Cambridge University Press. pp. 43 - 51. ISBN 0 521 22436 5. http://books.google.de/books?id=lK48AAAAIAAJ&pg=PA56&lpg=PA56&dq=roentgen+defined&source=bl&ots=DGneAMV5Ea&sig=a4ra-zQGp4-49WMn1sxb_IU0YA8&hl=de&sa=X&ei=AlmyT6KAOpPT4QT8soyOCQ&ved=0CHYQ6AEwCQ#v=onepage&q=roentgen%20defined&f=false. Retrieved 15 May 2012. 

v t e SI units Base units Ampere · Candela · Kelvin · Kilogram · Metre · Mole · Second Derived units Becquerel · Coulomb · Degree Celsius · Farad · Gray · Henry · Hertz · Joule · Katal · Lumen · Lux · Newton · Ohm · Pascal · Radian · Siemens · Sievert · Steradian · Tesla · Volt · Watt · Weber Accepted for use with SI Dalton (Atomic mass unit) · Astronomical unit · Day · Decibel · Degree Celsius · Degree of arc · Electronvolt · Hectare · Hour · Litre · Minute · Minute of arc · Neper · Second of arc · Tonne Atomic units · Natural units See also SI prefixes · Systems of measurement · Conversion of units · New SI definitions · History of the metric system Book:International System of Units  · Category:SI base units

Grey
— Common connotations —
depression, blandness, boredom, neutrality, fog, undefinedness, old age, contentment and speed
— Color coordinates —
Hex triplet		#C0C0C0
sRGBB	(r, g, b)	(128, 128, 128)
HSV	(h, s, v)	(--°, 0%, 50%)
Source		HTML/CSS[1]
B: Normalized to [0–255] (byte)

Grey or gray is an achromatic or neutral color.

Complementary colors are defined to mix to grey, either additively or subtractively, and many color models place complements opposite each other in a color wheel. To produce grey in RGB displays, the R, G, and B primary light sources are combined in proportions equal to that of the white point. In four-color printing, greys are produced either by the black channel, or by an approximately equal combination of CMY primaries. Images which consist wholly of neutral colors are called monochrome, black-and-white or greyscale.

The first recorded use of grey as a color name in the English language was in AD 700.^[2] Grey is the British, Canadian, Australian, Irish, New Zealand and South African spelling, although gray remained in common usage in the UK until the second half of the 20th century.^[3] Gray is the preferred American spelling, although grey is an accepted variant.^[4][5] Gray became the preferred spelling in American English around 1825.^[6]

In color theory[link]

Most grey pigments have a cool or warm cast to them, as the human eye can detect even a minute amount of saturation.^{[citation needed]} Yellow, orange, and red create a "warm grey". Green, blue, and violet create a "cool grey".^[7] When there is no cast at all, it is referred to as "neutral grey", "achromatic grey" or simply "grey".

Warm grey	Cool grey
Mixed with 6% yellow.	Mixed with 6% blue.

Two colors are called complementary colors if grey is produced when they are combined additively. Grey is its own complement.

Web colors[link]

There are several tones of grey available for use with HTML and CSS in word form, while there are 254 true greys available through Hex triplet. All are spelled with an a: using the e spelling can cause unexpected errors (this spelling was inherited from the X11 color list), and to this day, Internet Explorer's Trident browser engine does not recognize "grey" and will render it as green. Another anomaly is that "gray" is in fact much darker than the X11 color marked "darkgray"; this is because of a conflict with the original HTML grey and the X11 grey, which is closer to HTML's "silver". The three "slategray" colors are not themselves on the greyscale, but are slightly saturated towards cyan (green + blue). Note that since there are an even (256, including black and white) number of unsaturated tones of grey, there are actually two grey tones straddling the midpoint in the 8-bit greyscale. The color name "gray" has been assigned the lighter of the two shades (128 also known as #808080), due to rounding up.

Color coordinates[link]

RGB

Grey values result when r = g = b, for the color (r, g, b)

CMYK

Grey values are produced by c = m = y = 0, for the color (c, m, y, k). Lightness is adjusted by varying k. In theory, any mixture where c = m = y is neutral, but in practice such mixtures are often a muddy brown (see discussion on this topic).

HSL and HSV 

Achromatic greys have no hue, so the h code is marked as "undefined" using a dash: -- ; greys also result whenever s is 0 or undefined, as is the case when v is 0 or l is 0 or 1

See also[link]

• Black
• Black-and-white
• Vin gris (grey wine in French)
• List of colors
• Variations of grey
• White

References[link]

External links[link]

Wikimedia Commons has media related to: Gray

• Three computational biologists’ theory to explain how humans perceive achromatic colors:
• Chart showing a comparison of the achromatic (greyscale) values of the colors on the RYB and RGB color wheels, respectively (the chart is halfway down the webpage):

Look up unit in Wiktionary, the free dictionary.

Unit may refer to:

Mathematics[link]

• Unit (ring theory), an element that is invertible with respect to ring multiplication
• 1 (number), the unit number
• Unit vector, a vector with length equal to 1

Science and technology[link]

• Units (software), a software program for unit conversion
• Units of measurement, a standardized quantity of measurement of a physical quantity
• Enzyme unit
• Unit operation, a basic step in a chemical plant process
• Functional unit, a component of a computer system such as the CPU
• Unit of blood, a measurement in blood transfusion equal to one pint or 450 ml
• Unit of alcohol, 10 millilitres of pure ethanol in the United Kingdom
• Rack unit, a measure to describe the height of rack-mounted computer equipment
• Geological unit or rock unit, a volume of identifiable rock or ice
• In statistics:
  • Unit of observation, a type of entity (e.g. person, house, neighborhood) specifying the level at which data is collected
  • Unit of analysis, a type of entity (e.g. person, house, neighborhood) specifying the level at which data is analyzed
  • Statistical unit, a single data point, or collection of data points grouped as a single entity, on which statistical analysis is performed

Entertainment and the arts[link]

• UNIT, a fictional military organization in the science fiction television series Doctor Who
• Unit (album), by the Australian band Regurgitator
• Unit (art collective), a British artists' collective
• G-Unit, a hip-hop music group
• The Units, a synthpunk band
• The Unit, an American television series
• Second unit, a team that shoots footage which is of lesser importance for the final motion picture
• Unit of action, a discrete piece of action (or beat) in a theatrical presentation
• UNIT Post Production, a British company
• The Tony Rice Unit, an American bluegrass group

Other uses[link]

• Unit (housing), a self-contained suite of rooms within a set of similar dwellings
• Unit of account, a monetary unit of measurement
• An apartment
• Multiple unit, a passenger train where each carriage has it own motors
• Military unit
• Strategic business unit
• In real time strategy games, an individual (or squad, depending on the game) infantry or vehicle
• Work unit or danwei (单位), a place of employment in China

See also[link]

• UNITA
• Subunit (disambiguation)

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

Matthew Gray Gubler (born March 9, 1980) is an American actor, film director, painter, photographer, editor, and former fashion model. He is best known for his role as the young genius Dr. Spencer Reid in the CBS television show Criminal Minds, of which he has also directed three episodes. Gubler has also appeared in (500) Days of Summer as Joseph Gordon-Levitt's friend Paul. Gubler also is the voice of one of the chipmunks, Simon Seville, in Alvin and the Chipmunks, Alvin and the Chipmunks: The Squeakquel and Alvin and the Chipmunks: Chip-Wrecked. Gubler directed and created several movies that were mostly filmed in his hometown of Las Vegas as well as New York City, prior to his graduation from NYU.

Early life[link]

Gubler is a high school graduate of the Las Vegas Academy of International Studies, where he majored in acting, because the school did not offer his first love, film making.^[1] He is a graduate of New York University's Tisch School of the Arts where he majored in film directing. He also attended UC Santa Cruz. Gubler's parents were both born in Las Vegas and his mother, Marilyn Gubler, was the first woman to serve as Republican state Chairman. His grandfather Maxwell Kelch was the first president of the Las Vegas Chamber of Commerce and founded Las Vegas' first radio station (KENO). Gubler's sister Laura Dahl is a fashion designer based in New York City. He has a brother named Gray Gubler who was born in 1994, who appeared in the music video for the song Reagan by Whirlwind Heat (which Gubler directed).

Career[link]

While at NYU film school, Gubler was found by a model scout and then worked as a model with DNA Model Management for Tommy Hilfiger, Marc Jacobs and American Eagle^[2] among others. He was also ranked No. 46 on models.com list of top 50 male models. He has modeled brands such as Burberry, Marc Jacobs, and various others.

After he began modeling, Gubler had an internship for Wes Anderson, who encouraged him to audition for a part in his movie The Life Aquatic with Steve Zissou. Gubler did, and landed the role of Nico (a.k.a. Intern #1). This led to his role as Dr. Spencer Reid in Criminal Minds.^[2] An episode of his show, Criminal Minds, which ended in his character, Spencer Reid, staring down the barrel of a gun, received the highest ratings in the show's history (by episode) at over 26 million viewers.^{E214[citation not found]} While Matthew is a well-known actor in television show Criminal Minds, he also takes part in directing. In some episodes of the show he wears Shuron Ronsir prescription glasses; Gubler is extremely nearsighted.

He also had a small role in the 2006 film RV as the disreputable Joe Joe and voiced the character of Simon (the smart Chipmunk) in 2007's Alvin and the Chipmunks and again in 2009 and 2011 for Alvin and the Chipmunks: The Squeakquel and Alvin and the Chipmunks: Chip-Wrecked, alongside Jason Lee as Dave, Justin Long as Alvin, and Jesse McCartney as Theodore. He played the voice of Winsor in Scooby-Doo! Legend of the Phantosaur. He also appeared as the main character in How to Be a Serial Killer.

Filmmaking[link]

While making The Life Aquatic with Steve Zissou, Gubler made the documentary entitled Matthew Gray Gubler's Life Aquatic Intern Journal, a behind-the-scenes view of the making of the film, which was later included in the Criterion Collection DVD release.^[3] Gubler has directed and starred in a series of self-deprecating mockumentaries named Matthew Gray Gubler: the Unauthorized Documentary^[4] in which he parodies Hollywood behavior, which are filmed while on the set of Criminal Minds. A follow-up "Matthew Gray Gubler: The Authorized Documentary" was also made, although only one episode is currently available.^[1][4][5]

He directed, edited, and co-produced the music video for "Don't Shoot Me Santa" by the rock band The Killers.^[5]

He has also directed the episode "Mosley Lane" which was season 5 of Criminal Minds (5x16), which originally aired March 3, 2010, along with the episode "Lauren" (6x18), which aired a year later on March 16, 2011. The episode "Lauren" included the exit of Criminal Minds series regular Paget Brewster, who maintains a friendship with Gubler outside of work on the show. Brewster specifically asked Gubler to direct her last episode for the show, although it was announced later that she would return for season seven. His latest Criminal Minds episode as a director, "Heathridge Manor" (7x19), just aired on April 4, 2012.

Filmography[link]

Acting[link]

Directing[link]

References[link]

External links[link]

• Official website
• Matthew Gray Gubler bio at CBS – Criminal Minds
• Matthew Gray Gubler at the Internet Movie Database
• Matthew Gray Gubler at TV Guide
• Matthew Gray Gubler's Home Halloween Designs
• Interview with Matthew Gray Gubler

Matthew Gray (born 24 July 1973) is an athlete from Victoria, Australia. He competes in archery. He was an Australian Institute of Sport scholarship holder. ^[1].

Gray took up archery at the age of seven when his father bought a bow at a garage sale. After months of harassment, he took up archery. He was selected to be a part of the Australian team for the Junior World Field Championships in 1988 where he won a bronze medal. He won another bronze medal in 1994 at the senior World Field Championships and then won a place on the Australian team for the 1996 Summer Olympics in Atlanta where the men's team finished fourth overall and he finished 26th individually. He made the Australian team again for the 2000 Summer Olympics in Sydney where he finished 36th in the individual competition.Away from archery, Gray has a nursing degree.

At the 2008 Summer Olympics in Beijing Gray finished his ranking round with a total of 654 points. This gave him the 39th seed for the final competition bracket in which he faced Cheng Chu Sian in the first round. Cheng won the match with 109-101 and would eventually reach the quarter finals in which Bair Badënov was too strong.^[2]

Together with Sky Kim and Michael Naray he also took part in the team event. With his 654 score from the ranking round combined with the 665 of Kim and the 658 of Naray the Australians were in 9th position after the ranking round. In the first round they were defeated by eight seed Poland (223-218). The Polish would not come further than the quarter final.^[2]

At the 2010 Commonwealth Games in Delhi, Gray finisdhed fourth in the individual recurve and won gold in the team recurve event.

References[link]

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