Safety factor (plasma physics): Difference between revisions

From formulasearchengine
Jump to navigation Jump to search
← Older edit

en>Mild Bill Hiccup

en>Arthur Rubin
Undid revision 563339617 by Maurice Carbonaro (talk) WP:OVERLINK
en>Mild Bill Hiccup
→Rotational transform: have make → have made
 
Line 1: Line 1:
{{Expert-subject|Software|date=June 2010}}
A civil rights organization on Thursday demanded a meeting with the CEO of Barneys New York and threatened to picket the luxury department store in Manhattan after two black customers said they were stopped by police after making expensive purchases.<br><br>Trayon Christian, 19, of Queens said after he bought a $349 Ferragamo belt on April 29 he was handcuffed and detained for two hours before being released with no charges. He filed a discrimination lawsuit against Barneys and the New York City Police Department on Monday.<br><br>Undercover police swarmed Kayla Phillips, 21, of Brooklyn at a subway station and demanded to see her credit card after she left Barneys with her purchase of a $2,500 Celine purse on Feb. 28, said her lawyer Kareem Vessup.<br>Phillips, a nursing student, had received a tax return and decided to splurge on the designer purse, Vessup said.<br><br>She filed notice of an upcoming lawsuit against the NYPD and plans to sue Barneys, he said.<br>In his lawsuit, Christian, a mechanical engineering student, said when he bought the belt, Barneys telephoned police to report a criminal act. When he stepped out of the store with his shopping bag, he was handcuffed on the sidewalk and brought to the 19th Precinct, the lawsuit said.<br><br>Police interrogated him "as to how a young black man such as himself could afford to purchase such an expensive belt and that the debit card he had in his possession had to be fake," the lawsuit said.<br>Michael Palillo, a lawyer representing Christian, said his client  [http://www.pcs-systems.co.uk/Images/celinebag.aspx http://www.pcs-systems.co.uk/Images/celinebag.aspx] had saved up earnings from a work-study program at New York City College of Technology and was excited to treat himself to a trendy belt he'd admired on some of the rappers he follows on television.<br><br>"He enjoys fashion," Palillo said.<br>The racial profiling incident violated his civil rights, said the lawsuit, which was filed in state Supreme Court in Manhattan and seeks unspecified damages.<br>Barneys on its Facebook page said "no employee of Barneys" was involved and it "has zero tolerance for any form of discrimination and we stand by our long history in support of all human rights."<br><br>The NYPD did not immediately respond to a request for comment.<br>National Action Network, a civil rights group led by Reverend Al Sharpton, said it was [http://www.Google.com/search?q=mobilizing+activists&btnI=lucky mobilizing activists] to take direct action against the store and the NYPD.<br>"National Action Network will immediately demand a meeting with the Barneys New York CEO," NAN spokeswoman Rachel Noerdlinger said in a statement.<br><br>The group is "planning to picket the store if the pattern of racial profiling is not immediately rectified after numerous incidents of discrimination have come to light," Noerdlinger said.<br>The incidents came to light little more than two months after a judge ruled the NYPD discriminated against black and Hispanic youths in its controversial stop-and-frisk crime fighting tactic.<br><br>On its website, Barneys describes itself as "... a mecca for discerning fashionistas and clothing connoisseurs since 1923" and quotes "Sex and the City" actress Sarah Jessica Parker as telling Vanity Fair, "If you're a nice person and you work hard, you get to go shopping at Barneys. It's the decadent reward."<br><br>(Additional reporting by Luke Swiderski; [http://En.Search.Wordpress.com/?q=editing editing] by Gunna Dickson)
{{Primary sources|date=January 2010}}
{{Infobox software
| name                  = Kig
| logo                  = Kig icon.svg
| screenshot            = Kig-screenshot.png
| caption                = <!--Something more informative than the obvious "Screenshot of Kig" -->
| collapsible            =
| author                =
| developer              = [[KDE]]
| released              = {{Start date|2006|08|02|df=yes}}
| discontinued          =
| latest release version = 1.0
| latest release date    = <!-- {{Start date and age|YYYY|MM|DD|df=yes/no}} -->
| programming language  = [[C++]] ([[Qt (framework)|Qt]])
| operating system      = [[Unix-like]], [[Mac OS X]], [[Windows]]
| platform              =
| size                  =
| language              =
| status                =
| genre                  = [[Interactive geometry software]]
| license                = [[GNU General Public License|GPL]]
| website                = {{URL|http://edu.kde.org/kig/}}
}}
 
'''Kig''' is [[free and open-source]] [[interactive geometry software]], which is part of the
[[KDE edutainment project]]. It has some facilities for scripting in [[Python (programming language)|Python]], as well as the creating macros from existing constructions.
 
== Import and export ==
Kig can import files made by [[DrGeo]] and [[Cabri Geometry]] as well as its own file format, which is [[XML]]-encoded. Kig can export figures in [[LaTeX]] format and as [[SVG]] (vector graphics) files.
 
== Objects ==
Kig can handle any classical object of the dynamic geometry, but also:
# The [[center of curvature]] and [[osculating circle]] of a curve;
# The [[Dilation (affine geometry)|dilation]], generic [[Affinity (mathematics)|affinity]], [[inversion (discrete mathematics)|inversion]], [[projective application]], [[homography]] and [[harmonic homology]];
# The [[hyperbola]] with given [[asymptote]]s;
# The [[Beziers]] curves (2nd and 3rd degree);
# The [[polar line]] of a point and [[Pole and polar|pole]] of a [[line (geometry)|line]] with respect to a [[conic section]];
# The [[asymptote]]s of a [[hyperbola]];
# The [[cubic curve]] through 9 points;
# The cubic curve with a [[double point]] through 6 points;
# The cubic curve with a [[cusp (singularity)|cusp]] through 4 points.
 
== Scripting language ==
=== Inside the figure ===
Another object is available inside Kig, it is a [[Python (programming language)|Python language]] script. It can accept Kig objects as variables, and always return one object.
 
For example, if there is already a numeric object inside the figure, for example 3, the following Python object can yield its square (9):
<source lang="python">
def square( arg1 ):
return DoubleObject( arg1.value()**2 )
</source>
 
The variables are always called <code>arg1</code>, <code>arg2</code> etc. in the order they are clicked upon. Here there is only one variable <code>arg1</code> and its numerical value is obtained with <code>arg1.value()</code>.
 
If now one wants to implement the square of a complex number (represented by a point in the [[Argand diagram]]), the object which has to be selected at the creation of the script must necessarily be a point, and the script is
 
<source lang="python">
def csquare( arg1 ):
        x=arg1.coordinate().x
        y=arg1.coordinate().y
        z=x*x-y*y
        y=2*x*y
        x=z
        return Point( Coordinate(x,y) )
</source>
 
The [[abscissa]] of the point representing the square of the [[complex number]] is <math>x^2-y^2</math> as can be seen by expanding <math>(x+iy)^2=x^2-y^2+i(2xy)</math>. <code>Coordinate(x,y)</code> creates a Python list made of the two coordinates of the new point. And <code>Point</code> creates the point which [[coordinate]]s are precisely given by this list.
 
But a Python object inside a figure can only create one object and for more complex figures one has to build the figure with a script:
 
=== Figure created by a script ===
Kig comes up with a little program (written in Python) called <code>pikyg.py</code> which can
# load a Python script, e.g. <code>MyScript.py</code>
# build a Kig figure, described by this script
# open Kig and display the figure.
 
For example, here is how a [[Sierpinski triangle]] can be made (as an [[Iterated function system|IFS]]) with <code>pykig</code>:
<source lang="python">
from random import *
kigdocument.hideobjects()
A=Point(0,2)
A.show()
B=Point(-2,-1)
B.show()
C=Point(2,-1)
C.show()
M=Point(.1,.1)
for i in range(1,1000):
  d=randrange(3)
  if d==0:
    s=Segment(A,M)
    M=s.midpoint()
  if d==1:
    s=Segment(B,M)
    M=s.midpoint()
  if d==2:
    s=Segment(C,M)
    M=s.midpoint()
  M.show()
</source>
 
== References ==
{{reflist}}
 
== External links ==
{{Portal box|Geometry|Free software}}
* {{Official website|http://edu.kde.org/kig/}}
* [http://docs.kde.org/stable/en/kdeedu/kig/index.html The Kig Handbook]
* [http://www.freiesmagazin.de/mobil/freiesMagazin-2009-12-bilder.html#09_12_kig] a German article about how complex figures can be created with Kig and exported in [[LaTeX]]
 
{{KDE}}
 
[[Category:KDE Software Compilation]]
[[Category:KDE software]]
[[Category:KDE Education Project]]
[[Category:Software that uses Qt]]
[[Category:Free interactive geometry software]]
[[Category:Free educational software]]

Latest revision as of 04:23, 17 August 2014

A civil rights organization on Thursday demanded a meeting with the CEO of Barneys New York and threatened to picket the luxury department store in Manhattan after two black customers said they were stopped by police after making expensive purchases.

Trayon Christian, 19, of Queens said after he bought a $349 Ferragamo belt on April 29 he was handcuffed and detained for two hours before being released with no charges. He filed a discrimination lawsuit against Barneys and the New York City Police Department on Monday.

Undercover police swarmed Kayla Phillips, 21, of Brooklyn at a subway station and demanded to see her credit card after she left Barneys with her purchase of a $2,500 Celine purse on Feb. 28, said her lawyer Kareem Vessup.
Phillips, a nursing student, had received a tax return and decided to splurge on the designer purse, Vessup said.

She filed notice of an upcoming lawsuit against the NYPD and plans to sue Barneys, he said.
In his lawsuit, Christian, a mechanical engineering student, said when he bought the belt, Barneys telephoned police to report a criminal act. When he stepped out of the store with his shopping bag, he was handcuffed on the sidewalk and brought to the 19th Precinct, the lawsuit said.

Police interrogated him "as to how a young black man such as himself could afford to purchase such an expensive belt and that the debit card he had in his possession had to be fake," the lawsuit said.
Michael Palillo, a lawyer representing Christian, said his client http://www.pcs-systems.co.uk/Images/celinebag.aspx had saved up earnings from a work-study program at New York City College of Technology and was excited to treat himself to a trendy belt he'd admired on some of the rappers he follows on television.

"He enjoys fashion," Palillo said.
The racial profiling incident violated his civil rights, said the lawsuit, which was filed in state Supreme Court in Manhattan and seeks unspecified damages.
Barneys on its Facebook page said "no employee of Barneys" was involved and it "has zero tolerance for any form of discrimination and we stand by our long history in support of all human rights."

The NYPD did not immediately respond to a request for comment.
National Action Network, a civil rights group led by Reverend Al Sharpton, said it was mobilizing activists to take direct action against the store and the NYPD.
"National Action Network will immediately demand a meeting with the Barneys New York CEO," NAN spokeswoman Rachel Noerdlinger said in a statement.

The group is "planning to picket the store if the pattern of racial profiling is not immediately rectified after numerous incidents of discrimination have come to light," Noerdlinger said.
The incidents came to light little more than two months after a judge ruled the NYPD discriminated against black and Hispanic youths in its controversial stop-and-frisk crime fighting tactic.

On its website, Barneys describes itself as "... a mecca for discerning fashionistas and clothing connoisseurs since 1923" and quotes "Sex and the City" actress Sarah Jessica Parker as telling Vanity Fair, "If you're a nice person and you work hard, you get to go shopping at Barneys. It's the decadent reward."

(Additional reporting by Luke Swiderski; editing by Gunna Dickson)

Retrieved from "https://en.formulasearchengine.com/w/index.php?title=Safety_factor_(plasma_physics)&oldid=267721"