/* * Copyright (c) 2004, JSR-108 group (http://www.jcp.org/en/jsr/detail?id=108) * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - Neither the name of the JSR-108 nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package javax.units; /** *
This class contains units that are not part of the International * System of Units, that is, they are outside the SI, but are important * and widely used.
* * @author Jean-Marie Dautelle */ public final class NonSI { /** * Holds the standard gravity constant. */ private static double STANDARD_GRAVITY = 9.80665; // (m/s²) exact. /** * Holds the international foot. */ private static double INTERNATIONAL_FOOT = 0.3048; // (m) exact. /** * Holds the avoirdupois pound. */ private static double AVOIRDUPOIS_POUND = 0.45359237; // (kg) exact. /** * Holds the Avogadro constant. */ private static double AVOGADRO_CONSTANT = 6.02214199e23; // (1/mol). /** * Holds the electric charge of one electron. */ private static double ELEMENTARY_CHARGE = 1.602176462e-19; // (C). /** * Prevents this class from being instantiated. */ private NonSI() {} /////////////////// // Dimensionless // /////////////////// /** * A unit equals to 0.01 (dimensionless). */ public static final Unit PERCENT = UnitFormat.label(Unit.ONE.multiply(0.01), "%"); ////////////////// // Acceleration // ////////////////// /** * A unit of acceleration equal to an acceleration of one centimeter per * second per second. */ public static final Unit GALILEO = SI.METER.multiply(1e-2).divide(SI.SECOND.pow(2)); /** * A unit of acceleration equal to the gravity at the earth's surface. */ public static final Unit G = UnitFormat.label(SI.METER.divide(SI.SECOND.pow(2)). multiply(STANDARD_GRAVITY), "grav"); ///////////////////////// // Amount of substance // ///////////////////////// /** * A unit of amount of substance equals to one atom. */ public static final Unit ATOM = UnitFormat.label(SI.MOLE.multiply(1.0 / AVOGADRO_CONSTANT), "atom"); /////////// // Angle // /////////// /** * A unit of angle equal to a full circle or 2π {@link SI#RADIAN}. */ public static final Unit REVOLUTION = UnitFormat.label(SI.RADIAN.multiply(2.0 * Math.PI), "rev"); /** * A unit of angle equal to 1/360 {@link #REVOLUTION}. */ public static final Unit DEGREE_ANGLE = UnitFormat.label(REVOLUTION.multiply(1.0 / 360.0), "°"); /** * A unit of angle equal to 1/60 {@link #DEGREE_ANGLE}. */ public static final Unit MINUTE_ANGLE = UnitFormat.label(DEGREE_ANGLE.multiply(1.0 / 60.0), "′"); /** * A unit of angle equal to 1/60 {@link #MINUTE_ANGLE}. */ public static final Unit SECOND_ANGLE = UnitFormat.label(MINUTE_ANGLE.multiply(1.0 / 60.0), "″"); /** * A unit of angle equal to 0.01 {@link SI#RADIAN}. */ public static final Unit CENTIRADIAN = UnitFormat.label(SI.RADIAN.multiply(0.01), "centiradian"); /** * A unit of angle measure equal to 1/400 {@link #REVOLUTION}. */ public static final Unit GRADE = UnitFormat.label(REVOLUTION.multiply(1.0 / 400.0), "grade"); ////////// // Area // ////////// /** * A unit of area equal to100 m²
.
*/
public static final Unit ARE
= UnitFormat.label(SI.METER.pow(2).multiply(100), "a"); // Exact.
/**
* A unit of area equal to 100 {@link #ARE}.
*/
public static final Unit HECTARE
= UnitFormat.label(ARE.multiply(100), "ha"); // Exact.
/**
* A unit of area equal to 100 fm²
.
*/
public static final Unit BARN
= UnitFormat.label(SI.METER.pow(2).multiply(1e-28), "b"); // Exact.
/////////////////
// Data Amount //
/////////////////
/**
* A unit of data amount equal to 8 bits (BinarY TErm).
*/
public static final Unit BYTE
= UnitFormat.label(SI.BIT.multiply(8), "byte");
/**
* Equivalent {@link #BYTE}
*/
public static final Unit OCTET = BYTE;
//////////////
// Duration //
//////////////
/**
* A unit of duration equal to 60 s
.
*/
public static final Unit MINUTE
= UnitFormat.label(SI.SECOND.multiply(60), "min");
/**
* A unit of duration equal to 60 {@link #MINUTE}.
*/
public static final Unit HOUR
= UnitFormat.label(MINUTE.multiply(60), "h");
/**
* A unit of duration equal to 24 {@link #HOUR}.
*/
public static final Unit DAY
= UnitFormat.label(HOUR.multiply(24), "d");
/**
* A unit of duration equal to 7 {@link #DAY}.
*/
public static final Unit WEEK
= UnitFormat.label(DAY.multiply(7), "week");
/**
* A unit of duration equal to 365 days, 5 hours, 49 minutes,
* and 12 seconds.
*/
public static final Unit YEAR
= UnitFormat.label(SI.SECOND.multiply(31556952), "year");
/**
* A unit of duration equal to one twelfth of a year.
*/
public static final Unit MONTH
= UnitFormat.label(YEAR.multiply(1.0 / 12.0), "month");
/**
* A unit of duration equal to the time required for a complete rotation of
* the earth in reference to any star or to the vernal equinox at the
* meridian, equal to 23 hours, 56 minutes, 4.09 seconds.
*/
public static final Unit DAY_SIDEREAL
= UnitFormat.label(SI.SECOND.multiply(86164.09), "day_sidereal");
/**
* A unit of duration equal to one complete revolution of the
* earth about the sun, relative to the fixed stars, or 365 days, 6 hours,
* 9 minutes, 9.54 seconds.
*/
public static final Unit YEAR_SIDEREAL
= UnitFormat.label(SI.SECOND.multiply(31558149.54), "year_sidereal");
/**
* A unit of duration equal to 365 {@link #DAY}.
*/
public static final Unit YEAR_CALENDAR
= UnitFormat.label(DAY.multiply(365), "year_calendar");
/**
* A unit of duration equal to 1E9 {@link #YEAR}.
*/
public static final Unit AEON = YEAR.multiply(1e9);
/////////////////////
// Electric charge //
/////////////////////
/**
* A unit of electric charge equal to the charge on one electron.
*/
public static final Unit E
= UnitFormat.label(SI.COULOMB.multiply(ELEMENTARY_CHARGE), "e");
/**
* A unit of electric charge equal to equal to the product of Avogadro's
* number (see {@link SI#MOLE}) and the charge (1 e) on a single electron.
*/
public static final Unit FARADAY
= UnitFormat.label(SI.COULOMB.
multiply(ELEMENTARY_CHARGE * AVOGADRO_CONSTANT), "Fd"); // e/mol
/**
* A unit of electric charge which exerts a force of one dyne on an equal
* charge at a distance of one centimeter.
*/
public static final Unit FRANKLIN
= UnitFormat.label(SI.COULOMB.multiply(3.3356e-10), "Fr");
//////////////////////
// Electric current //
//////////////////////
/**
* A unit of electric charge equal to the centimeter-gram-second
* electromagnetic unit of magnetomotive force, equal to 10/4 π
* ampere-turn.
*/
public static final Unit GILBERT
= UnitFormat.label(SI.AMPERE.multiply(10.0 / (4.0 * Math.PI)), "Gi");
////////////
// Energy //
////////////
/**
* A unit of energy equal to 1055.056 J
.
*/
public static final Unit BTU
= UnitFormat.label(SI.JOULE.multiply(1055.056), "Btu");
/**
* A unit of energy equal to 1054.350 J
(thermochemical).
*/
public static final Unit BTU_TH
= UnitFormat.label(SI.JOULE.multiply(1054.350), "Btu_Th");
/**
* A unit of energy equal to 1055.87 J
(mean).
*/
public static final Unit BTU_MEAN
= UnitFormat.label(SI.JOULE.multiply(1055.87), "Btu_mean");
/**
* A unit of energy equal to 4.1868 J
* (symbol cal
).
*/
public static final Unit CALORIE
= UnitFormat.label(SI.JOULE.multiply(4.1868), "cal");
/**
* A unit of energy equal to one kilo-calorie (symbol Cal
).
* This is the most common unit of heat energy.
*/
public static final Unit KILOCALORIE
= UnitFormat.label(CALORIE.multiply(1e3), "Cal");
/**
* A unit of energy equal to 1E-7 J
.
*/
public static final Unit ERG
= UnitFormat.label(SI.JOULE.multiply(1e-7), "erg");
/**
* A unit of energy equal to one electron-volt
* (symbol eV
, also recognized keV, MeV, GeV
).
*/
public static final Unit ELECTRON_VOLT
= UnitFormat.label(SI.JOULE.multiply(ELEMENTARY_CHARGE), "eV");
static {
UnitFormat.label(ELECTRON_VOLT.multiply(1e3), "keV");
UnitFormat.label(ELECTRON_VOLT.multiply(1e6), "MeV");
UnitFormat.label(ELECTRON_VOLT.multiply(1e9), "GeV");
}
/**
* A unit of energy equal to 105.4804E6 J
(appr.).
*/
public static final Unit THERM
= UnitFormat.label(SI.JOULE.multiply(105.4804e6), "thm"); // Appr.
/////////////////
// Illuminance //
/////////////////
/**
* A unit of illuminance equal to 1E4 Lx
.
*/
public static final Unit LAMBERT
= UnitFormat.label(SI.LUX.multiply(1e4), "La");
////////////
// Length //
////////////
/**
* A unit of length equal to 0.3048 m
(1959 Standard).
*/
public static final Unit FOOT
= UnitFormat.label(SI.METER.multiply(INTERNATIONAL_FOOT), "ft");
/**
* A unit of length equal to 0.9144 m
(1959 Standard).
*/
public static final Unit YARD
= UnitFormat.label(FOOT.multiply(3), "yd");
/**
* A unit of length equal to 0.0254 m
(1959 Standard).
*/
public static final Unit INCH
= UnitFormat.label(FOOT.multiply(1.0 / 12.0), "in");
/**
* A unit of length equal to 1609.344 m
.
*/
public static final Unit MILE
= UnitFormat.label(SI.METER.multiply(1609.344), "mi");
/**
* A unit of length equal to 1852.0 m
.
*/
public static final Unit NAUTICAL_MILE
= UnitFormat.label(SI.METER.multiply(1852.0), "nmi");
/**
* A unit of length equal to 1E-10 m
(symbol Å
).
*/
public static final Unit ANGSTROM
= UnitFormat.label(SI.METER.multiply(1e-10), "Å");
/**
* A unit of length equal to the average distance from the center of the
* Earth to the center of the Sun.
*/
public static final Unit ASTRONOMICAL_UNIT
= UnitFormat.label(SI.METER.multiply(149597870691.0), "ua");
/**
* A unit of length equal to the distance that light travels in one year
* through a vacuum.
*/
public static final Unit LIGHT_YEAR
= UnitFormat.label(SI.METER.multiply(9.460528405e15), "ly");
/**
* A unit of length equal to the distance at which a star would appear to
* shift its position by one arcsecond over the course the time
* (about 3 months) in which the Earth moves a distance of
* {@link #ASTRONOMICAL_UNIT} in the direction perpendicular to the
* direction to the star.
*/
public static final Unit PARSEC
= UnitFormat.label(SI.METER.multiply(30856770e9), "pc");
/**
* A unit of length equal to the mean distance between the proton
* and the electron in an unexcited hydrogen atom.
*/
public static final Unit BOHR
= UnitFormat.label(SI.METER.multiply(52.918e-12), "Bohr");
/**
* A unit of length equal to 0.013837 {@link #INCH} exactly (standardized
* by the American Typefounders Association).
* @see #PIXEL
*/
public static final Unit POINT
= UnitFormat.label(INCH.multiply(0.013837), "pt");
/**
* A unit of length equal to 1/72 {@link #INCH}. It is the American point
* rounded to an even 1/72 inch.
* @see #POINT
*/
public static final Unit PIXEL
= UnitFormat.label(INCH.multiply(1.0 / 72.0), "pixel");
/**
* Equivalent {@link #PIXEL}
*/
public static final Unit COMPUTER_POINT = PIXEL;
/**
* A unit of length equal to 12 {@link #POINT}.
* @see #POINT
*/
public static final Unit PICA
= UnitFormat.label(POINT.multiply(12), "pi");
/**
* A unit of length equal to 0.37592e-3 m
.
*/
public static final Unit DIDOT
= UnitFormat.label(SI.METER.multiply(0.37592e-3), "Didot");
/**
* A unit of length equal to 12 {@link #DIDOT}.
*/
public static final Unit CICERO
= UnitFormat.label(DIDOT.multiply(12), "cicero");
///////////////////
// Magnetic Flux //
///////////////////
/**
* A unit of magnetic flux equal 1E-8 Wb
.
*/
public static final Unit MAXWELL
= UnitFormat.label(SI.WEBER.multiply(1e-8), "Mx");
///////////////////////////
// Magnetic Flux Density //
///////////////////////////
/**
* A unit of magnetic flux density equal 1000 A/m
.
*/
public static final Unit GAUSS
= UnitFormat.label(SI.TESLA.multiply(1e-4), "G");
//////////
// Mass //
//////////
/**
* A unit of mass equal to 1/12 the mass of the carbon-12 atom.
*/
public static final Unit ATOMIC_MASS
= UnitFormat.label(SI.KILOGRAM.multiply(1E-3 / AVOGADRO_CONSTANT), "u");
/**
* A unit of mass equal to the mass of the electron.
*/
public static final Unit ELECTRON_MASS
= UnitFormat.label(SI.KILOGRAM.multiply(9.10938188e-31), "me");
/**
* A unit of mass equal to 200 milligrams.
*/
public static final Unit CARAT
= UnitFormat.label(SI.KILOGRAM.multiply(200e-6), "ct");
/**
* A unit of mass equal to 453.59237 grams
(avoirdupois pound).
*/
public static final Unit POUND
= UnitFormat.label(SI.KILOGRAM.multiply(AVOIRDUPOIS_POUND), "lb");
/**
* A unit of mass equal to 1 / 16 {@link #POUND}.
*/
public static final Unit OUNCE
= UnitFormat.label(POUND.multiply(1.0 / 16.0), "oz_av");
/**
* A unit of mass equal to 2000 {@link #POUND} (short ton).
*/
public static final Unit TON_US
= UnitFormat.label(POUND.multiply(2000), "ton_US");
/**
* A unit of mass equal to 2240 {@link #POUND} (long ton).
*/
public static final Unit TON_UK
= UnitFormat.label(POUND.multiply(2240), "ton_UK");
/**
* A unit of mass equal to 1000 kg
(metric ton).
*/
public static final Unit METRIC_TON
= UnitFormat.label(SI.KILOGRAM.multiply(1000), "t");
///////////
// Force //
///////////
/**
* A unit of force equal to 1E-5 N
.
*/
public static final Unit DYNE
= UnitFormat.label(SI.NEWTON.multiply(1e-5), "dyn");
/**
* A unit of force equal to 9.80665 N
.
*/
public static final Unit KILOGRAM_FORCE
= UnitFormat.label(SI.NEWTON.multiply(STANDARD_GRAVITY), "kgf");
/**
* A unit of force equal to {@link #POUND} * {@link #G}.
*/
public static final Unit POUND_FORCE
= UnitFormat.label(SI.NEWTON.multiply(
AVOIRDUPOIS_POUND * STANDARD_GRAVITY), "lbf");
///////////
// Power //
///////////
/**
* A unit of power equal to the power required to raise a mass of 75
* kilograms at a velocity of 1 meter per second (metric).
*/
public static final Unit HORSEPOWER
= UnitFormat.label(SI.WATT.multiply(735.499), "hp");
//////////////
// Pressure //
//////////////
/**
* A unit of pressure equal to the average pressure of the Earth's
* atmosphere at sea level.
*/
public static final Unit ATMOSPHERE
= UnitFormat.label(SI.PASCAL.multiply(101325), "atm");
/**
* A unit of pressure equal to 100 kPa
.
*/
public static final Unit BAR
= UnitFormat.label(SI.PASCAL.multiply(100e3), "bar");
/**
* A unit of pressure equal to 1E-3 {@link #BAR}.
*/
public static final Unit MILLIBAR
= UnitFormat.label(BAR.multiply(1.0 / 1000.0), "mbar");
/**
* A unit of pressure equal to the pressure exerted at the Earth's
* surface by a column of mercury 1 millimeter high.
*/
public static final Unit MILLIMETER_OF_MERCURY
= UnitFormat.label(SI.PASCAL.multiply(133.322), "mm_Hg");
/**
* A unit of pressure equal to the pressure exerted at the Earth's
* surface by a column of mercury 1 inch high.
*/
public static final Unit INCH_OF_MERCURY
= UnitFormat.label(SI.PASCAL.multiply(3386.388), "in_Hg");
/////////////////////////////
// Radiation dose absorbed //
/////////////////////////////
/**
* A unit of radiation dose absorbed equal to a dose of 0.01 joule of
* energy per kilogram of mass (J/kg).
*/
public static final Unit RAD
= UnitFormat.label(SI.GRAY.multiply(0.01), "rd");
/**
* A unit of radiation dose effective equal to 0.01 Sv
.
*/
public static final Unit REM
= UnitFormat.label(SI.SIEVERT.multiply(0.01), "rem");
//////////////////////////
// Radioactive activity //
//////////////////////////
/**
* A unit of radioctive activity equal to the activity of a gram of radium.
*/
public static final Unit CURIE
= UnitFormat.label(SI.BECQUEREL.multiply(3.7e10), "Ci");
/**
* A unit of radioctive activity equal to 1 million radioactive
* disintegrations per second.
*/
public static final Unit RUTHERFORD
= UnitFormat.label(SI.BECQUEREL.multiply(1e6), "Rd");
/////////////////
// Solid angle //
/////////////////
/**
* A unit of solid angle equal to 4 π steradians.
*/
public static final Unit SPHERE
= UnitFormat.label(SI.STERADIAN.multiply(4.0 * Math.PI), "sphere");
/////////////////
// Temperature //
/////////////////
/**
* A unit of temperature equal to 5/9 °K
.
*/
public static final Unit RANKINE
= UnitFormat.label(SI.KELVIN.multiply(5.0 / 9.0), "°R");
/**
* A unit of temperature equal to degree Rankine minus
* 459.67 °R
.
* @see #RANKINE
*/
public static final Unit FAHRENHEIT
= UnitFormat.label(RANKINE.add(459.67), "°F");
//////////////
// Velocity //
//////////////
/**
* A unit of velocity equal to one {@link #NAUTICAL_MILE} per {@link #HOUR}.
*/
public static final Unit KNOT = NAUTICAL_MILE.divide(HOUR);
/**
* A unit of velocity to express the speed of an aircraft relative to
* the speed of sound.
*/
public static final Unit MACH
= UnitFormat.label(SI.METER.divide(SI.SECOND).multiply(331.6), "M");
/**
* A unit of velocity relative to the speed of light.
*/
public static final Unit C
= UnitFormat.label(SI.METER.divide(SI.SECOND).
multiply(299792458.0), "c");
////////////
// Volume //
////////////
/**
* A unit of volume equal to one cubic decimeter (symbol L
,
* also recognized µL, mL, cL, dL
, 1964 standard).
*/
public static final Unit LITER
= UnitFormat.label(SI.METER.pow(3).multiply(0.001), "L");
static {
UnitFormat.label(LITER.multiply(1e-6), "µL");
UnitFormat.label(LITER.multiply(1e-3), "mL");
UnitFormat.label(LITER.multiply(1e-2), "cL");
UnitFormat.label(LITER.multiply(1e-1), "dL");
}
/**
* A unit of volume equal to one US gallon, Liquid Unit. The U.S. liquid
* gallon is based on the Queen Anne or Wine gallon occupying 231 cubic
* inches.
*/
public static final Unit GALLON_LIQUID_US
= UnitFormat.label(INCH.pow(3).multiply(231), "gallon_liquid_US");
/**
* A unit of volume equal to 1 / 8 {@link #GALLON_LIQUID_US}
*/
public static final Unit PINT_LIQUID_US
= UnitFormat.label(GALLON_LIQUID_US.multiply(1.0 / 8.0),
"pint_liquid_US");
/**
* A unit of volume equal to 1 / 16 {@link #PINT_LIQUID_US}.
*/
public static final Unit FLUID_OUNCE_US
= UnitFormat.label(PINT_LIQUID_US.multiply(1.0 / 16.0),
"fluid_ounce_US");
/**
* A unit of volume equal to one US dry gallon.
*/
public static final Unit GALLON_DRY_US
= UnitFormat.label(INCH.pow(3).multiply(268.8025), "gallon_dry_US");
/**
* A unit of volume equal to one 1 / 8 {@link #GALLON_DRY_US}
*/
public static final Unit PINT_DRY_US
= UnitFormat.label(GALLON_DRY_US.multiply(1.0 / 8.0), "pint_dry_US");
/**
* A unit of volume equal to 4.546 09 {@link #LITER}.
*/
public static final Unit GALLON_UK
= UnitFormat.label(LITER.multiply(4.54609), "gallon_UK");
/**
* A unit of volume equal to 1 / 8 {@link #GALLON_UK}
*/
public static final Unit PINT_UK
= UnitFormat.label(GALLON_UK.multiply(1.0 / 8.0), "pint_UK");
/**
* A unit of volume equal to 1 / 160 {@link #GALLON_UK}
*/
public static final Unit FLUID_OUNCE_UK
= UnitFormat.label(GALLON_UK.multiply(1.0 / 160.0), "fluid_ounce_UK");
/**
* A unit of volume equal to 8 {@link #FLUID_OUNCE_US}
*/
public static final Unit CUP_US
= UnitFormat.label(FLUID_OUNCE_US.multiply(8), "cup_US");
/**
* A unit of volume equal to 10 {@link #FLUID_OUNCE_UK}
*/
public static final Unit CUP_UK
= UnitFormat.label(FLUID_OUNCE_UK.multiply(10), "cup_UK");
/**
* A unit of volume equal to 1 / 2 {@link #FLUID_OUNCE_US}
*/
public static final Unit TABLESPOON_US
= UnitFormat.label(FLUID_OUNCE_US.multiply(1.0 / 2.0), "tablespoon_US");
/**
* A unit of volume equal to one 5 / 8 {@link #FLUID_OUNCE_UK}
*/
public static final Unit TABLESPOON_UK
= UnitFormat.label(FLUID_OUNCE_UK.multiply(5.0 / 8.0), "taplespoon_UK");
/**
* A unit of volume equal to 1 / 6 {@link #FLUID_OUNCE_US}
*/
public static final Unit TEASPOON_US
= UnitFormat.label(FLUID_OUNCE_US.multiply(1.0 / 6.0), "teaspoon_US");
/**
* A unit of volume equal to 1 / 6 {@link #FLUID_OUNCE_UK}
*/
public static final Unit TEASPOON_UK
= UnitFormat.label(FLUID_OUNCE_UK.multiply(1.0 / 6.0), "teaspoon_UK");
/**
* A unit of volume equal to 20.0 mL
(Australian tablespoon).
*/
public static final Unit TABLESPOON_AU
= UnitFormat.label(SI.METER.pow(3).multiply(20.0e-6), "tablespoon_AU");
////////////
// Others //
////////////
/**
* A unit used to measure the ionizing ability of radiation.
*/
public static final Unit ROENTGEN
= UnitFormat.label(SI.COULOMB.divide(SI.KILOGRAM).
multiply(2.58e-4), "R");
}