What is the fabric in the application processor?

What is the definition of a switch fabric?

From this site
"Hence the “crossbar silicon switch chip” became known as the “silicon fabric” and later was further shortened to just “fabric” out of laziness and incomprehension."


http://en.wikipedia.org/wiki/Switched_fabric

Why 60 fps is better?

60 FPS Difference
http://www.es.com/Products/60Frames.html

Frame Rate & Motion Blur
http://frames-per-second.appspot.com/

Android Key Event

Android, low level shell click on screen
http://blog.softteco.com/2011/03/android-low-level-shell-click-on-screen.html

adb shell input events
http://stackoverflow.com/questions/7789826/adb-shell-input-events

CDMA, WCDMA, and LTE

CDMA (Code Division)
===================================
- RSCP: Received Signal Code Power


WCDMA (Code Division)
===================================
- RSCP: Received Signal Code Power
 http://en.wikipedia.org/wiki/RSCP

LTE (OFDM)
===================================
- RSRP: Received Signal Reference Power
- OFDM: Orthogonal Frequency Division Multiplexing
 http://en.wikipedia.org/wiki/Orthogonal_frequency-division_multiplexing

Why is 44.1 kHz sampling in CD or digital music file (mp3 or wma, ...)?

Currently famous digital music file use 44.1 kHz sampling rate.

As you know, 

- Normal human being can hear 20 Hz ~ 20,000 Hz sound.

- And from the Nyquist sampling theorem, 

---------------------------------------------------------------------

 The Nyquist sampling theorem provides a prescription for the nominal sampling interval required to avoid aliasing. It may be stated simply as follows:

 The sampling frequency should be at least twice the highest frequency contained in the signal.Or in mathematical terms:

     fs >= 2 * fc

(http://redwood.berkeley.edu/bruno/npb261/aliasing.pdf)

In this reason, in the digital music need only 40 kHz sampling rate.

Why is 44.1 kHz sampling rate used in the world?
It is based on Video Tape,
1. http://www.cs.columbia.edu/~hgs/audio/44.1.html
2.http://en.wikipedia.org/wiki/44,100_Hz 

Kconfig: help or ---help--- ?

From the http://kernel.org/doc/Documentation/kbuild/kconfig-language.txt

- help text: "help" or "---help---"   This defines a help text. The end of the help text is determined by   the indentation level, this means it ends at the first line which has   a smaller indentation than the first line of the help text.   "---help---" and "help" do not differ in behaviour, "---help---" is   used to help visually separate configuration logic from help within   the file as an aid to developers.

Android - Hotplug Off (Multi-Core enable)

If your device has root permission

adb shell stop mpdecision

adb shell "echo 1 > /sys/devices/system/cpu/cpu1/online"

or

# stop mpdecision

# echo 1 > /sys/devices/system/cpu/cpu1/online

# ...

xda - developers

http://forum.xda-developers.com/showthread.php?t=1216197

update 1/31

Support for hot-pluggable CPUs

CONFIG_HOTPLUG_CPU=y

or # CONFIG_HOTPLUG_CPU is not set

http://cateee.net/lkddb/web-lkddb/HOTPLUG_CPU.html