signal “expose-event”



g_signal_connect .
The second argument for this function is
detailed_signal : a string of the form "signal-name::detail".
source :http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html
GtkWidget is the base class for all widgets.
"expose-event" is an signal and the signal list is available at
http://library.gnome.org/devel/gtk/unstable/GtkWidget.html

IP Puzzles +

Amidst the traffic of the Internet is an enormous amount of undesirable communication.
Currently there is no significant disincentive for clients who contribute to this
flood of undesirable communication. A mechanism for punishing only the malicious
is required in order to discourage clients from behaving badly. The standard response
has been to disconnect clients exhibiting suspicious behavior from the rest of the
network using a binary fillter. Ideally though, the mechanism should be analog to
allow falsely identified clients to prove that they are legitimate, so that service to
them can be reinstated. Client puzzles have been proposed in several protocols as a
mechanism well suited for this task;  clients do all the work involved in proving their
legitimacy.

Reference :
Reducing Malicious Traffic With IP Puzzles
Ed Kaiser Wu-chang Feng Wu-chi Feng Antoine Luu
OGI@OHSU
ENSEIRB
{edkaiser, wuchang, wuchi}@cse.ogi.edu
luu@enseirb.fr

rectangle +



A closed planar quadrilateral with opposite sides of equal lengths and ,
and with four right angles. A square is a degenerate rectangle with a=b

The area of the rectangle is A=ab

and its polygon diagonals p and q are of length

[latex]
p = q = \sqrt{(a{^2}+b{^2})}
[/latex]

A rectangle has a circumcircle with circumradius

[latex]
R = (1 \div 2) \sqrt{(a{^2}+b{^2})}
[/latex]

but incircle only in the degenerate case of a square.

Reference :
http://mathworld.wolfram.com/Rectangle.html

definition circle.

A circle is the set of points equidistant from a point C(h,k) called the
center. The fixed distance r from the center to any point on the circle is
called the radius.
The standard equation of a circle with center C(h,k) and radius r is as follows.

[latex]
(x-h){^2} + (y-k){^2} = r{^2}
[/latex]

Reference.
http://www.analyzemath.com/CircleEq/Tutorials.html

destined +

Text :
Forward Chain : Filters packets destined for networks protected
by the firewall.
Meaning :
Filters packets that are determined beforehand for networks
(it not "the networks") protected by the firewall.
I think it is the private networks.
Packets that come from the outside world into the private network.
A firewall is normally a firewall for outside world and not for the private network.
Table comes first and then comes Chain.
Table here means a set of data arranged in rows and columns.
Filter chains means to restrain using a series of related or connected
facts,events etc.

P.S I do not guarantee about the correctness of the above statements.

mysql start

MySQL tinkering


mysql> create database jeffdatabase
-> ;
Query OK, 1 row affected (0.03 sec)

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| jeffdatabase |
| mysql |
+--------------------+
3 rows in set (0.00 sec)

mysql> use jeffdatabase
Database changed
mysql> show tables;
Empty set (0.00 sec)
mysql> create table songs (hindi VARCHAR(20));
Query OK, 0 rows affected (0.03 sec)

mysql>