Capacitance.php #1

<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category  Zend
 * @package   Zend_Measure
 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 * @version   $Id: Capacitance.php 24594 2012-01-05 21:27:01Z matthew $
 */

/**
 * Implement needed classes
 */
require_once 'Zend/Measure/Abstract.php';
require_once 'Zend/Locale.php';

/**
 * Class for handling capacitance conversions
 *
 * @category   Zend
 * @package    Zend_Measure
 * @subpackage Zend_Measure_Capacitance
 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Measure_Capacitance extends Zend_Measure_Abstract
{
    const STANDARD = 'FARAD';

    const ABFARAD                = 'ABFARAD';
    const AMPERE_PER_SECOND_VOLT = 'AMPERE_PER_SECOND_VOLT';
    const CENTIFARAD             = 'CENTIFARAD';
    const COULOMB_PER_VOLT       = 'COULOMB_PER_VOLT';
    const DECIFARAD              = 'DECIFARAD';
    const DEKAFARAD              = 'DEKAFARAD';
    const ELECTROMAGNETIC_UNIT   = 'ELECTROMAGNETIC_UNIT';
    const ELECTROSTATIC_UNIT     = 'ELECTROSTATIC_UNIT';
    const FARAD                  = 'FARAD';
    const FARAD_INTERNATIONAL    = 'FARAD_INTERNATIONAL';
    const GAUSSIAN               = 'GAUSSIAN';
    const GIGAFARAD              = 'GIGAFARAD';
    const HECTOFARAD             = 'HECTOFARAD';
    const JAR                    = 'JAR';
    const KILOFARAD              = 'KILOFARAD';
    const MEGAFARAD              = 'MEGAFARAD';
    const MICROFARAD             = 'MICROFARAD';
    const MILLIFARAD             = 'MILLIFARAD';
    const NANOFARAD              = 'NANOFARAD';
    const PICOFARAD              = 'PICOFARAD';
    const PUFF                   = 'PUFF';
    const SECOND_PER_OHM         = 'SECOND_PER_OHM';
    const STATFARAD              = 'STATFARAD';
    const TERAFARAD              = 'TERAFARAD';

    /**
     * Calculations for all capacitance units
     *
     * @var array
     */
    protected $_units = array(
        'ABFARAD'              => array('1.0e+9',      'abfarad'),
        'AMPERE_PER_SECOND_VOLT' => array('1',         'A/sV'),
        'CENTIFARAD'           => array('0.01',        'cF'),
        'COULOMB_PER_VOLT'     => array('1',           'C/V'),
        'DECIFARAD'            => array('0.1',         'dF'),
        'DEKAFARAD'            => array('10',          'daF'),
        'ELECTROMAGNETIC_UNIT' => array('1.0e+9',      'capacity emu'),
        'ELECTROSTATIC_UNIT'   => array('1.11265e-12', 'capacity esu'),
        'FARAD'                => array('1',           'F'),
        'FARAD_INTERNATIONAL'  => array('0.99951',     'F'),
        'GAUSSIAN'             => array('1.11265e-12', 'G'),
        'GIGAFARAD'            => array('1.0e+9',      'GF'),
        'HECTOFARAD'           => array('100',         'hF'),
        'JAR'                  => array('1.11265e-9',  'jar'),
        'KILOFARAD'            => array('1000',        'kF'),
        'MEGAFARAD'            => array('1000000',     'MF'),
        'MICROFARAD'           => array('0.000001',    'µF'),
        'MILLIFARAD'           => array('0.001',       'mF'),
        'NANOFARAD'            => array('1.0e-9',      'nF'),
        'PICOFARAD'            => array('1.0e-12',     'pF'),
        'PUFF'                 => array('1.0e-12',     'pF'),
        'SECOND_PER_OHM'       => array('1',           's/Ohm'),
        'STATFARAD'            => array('1.11265e-12', 'statfarad'),
        'TERAFARAD'            => array('1.0e+12',     'TF'),
        'STANDARD'             => 'FARAD'
    );
}