Triple clicks is like more than home

Justin Bieber and Selena Gomez on Vacay

    

What do you think Justin is doing? 

Do you think this cutie pie can handle that on the Hawaii beach.

 See the second pic, Justin wants to move Selena's hands away. 

He looks like can not control if Selena keep her hand in Justin's west. 

What do you think so? 

Note: these pictures were not taken by blogger. This is widely found on the internet while browsing

Fourier Analysis

Commands covered:

dft

idft

fft

ifft

contfft

The dft command uses a straightforward method to compute the discrete Fourier transform. Define a vector x and compute the DFT using the command
X = dft(x)
The first element in X corresponds to the value of X(0).
The command idft uses a straightforward method to compute the inverse discrete Fourier transform. Define a vector X and compute the IDFT using the command

x = idft(X)

The first element of the resulting vector x is x[0].
For a more efficient but less obvious program, the discrete Fourier transform can be computed using the command fft which performs a Fast Fourier Transform of a sequence of numbers. To compute the FFT of a sequence x[n] which is stored in the vector x, use the command
X = fft(x)
Used in this way, the command fft is interchangeable with the command dft. For more computational efficiency, the length of the vector x should be equal to an exponent of 2, that is 64, 128, 512, 1024, 2048, etc. The vector x can be padded with zeros to make it have an appropriate length. MATLAB does this automatically by using the following command where N is defined to be an exponent of 2:

X = fft(x,N);

The longer the length of x, the finer the grid will be for the FFT. Due to a wrap around effect, only the first N/2 points of the FFT have any meaning.
The ifft command computes the inverse Fourier transform:

x = ifft(X);

The FFT can be used to approximate the Fourier transform of a continuous-time signal as shown in Section 6.6 of the textbook. A continuous-time signal x(t) is sampled with a period of T seconds, then the DFT is computed for the sampled signal. The resulting amplitude must be scaled and the corresponding frequency determined. An M-file that approximates the Fourier Transform of a sampled continuous-time signal can be downloaded from contfft.m. Let a vector x be defined as the sampled continuous-time signal x(t) and let T be the sampling time.

[X,w] = contfft(x,T);

The outputs are the Fourier transform stored in the vector X and the corresponding frequency vector w.

Source: Georgia Tech
 

Darwin Cyclone watch.....

via: http://www.bom.gov.au/products/IDD65011.shtml

Community Threat	Past Cyclone Details
Warning Zone - Gales within 24 hours Watch Zone - Gales from 24 to 48 hours	Past Location and Intensity Number Past Track and Movement
Current Cyclone Details	Forecast Cyclone Details (at 24 and 48 hours from issue)
Current Location and Intensity Number Very Destructive Winds Destructive Winds Gale Force Winds	Forecast Location and Intensity Number Very Destructive Wind Boundary Destructive Wind Boundary Gale Force Wind Boundary Most Likely Future Track Range of Likely Tracks of Cyclone Centre

The forecast path shown above is the Bureau's best estimate of the cyclone's future movement and intensity. There is always some uncertainty associated with tropical cyclone forecasting and the grey zone indicates the range of likely tracks of the cyclone centre.
Due to the uncertainty in the future movement, the indicated winds will almost certainly extend to regions outside the rings on this map. The extent of the warning and watch zones reflects this.
This product is designed for land-based communities; mariners should read the coastal waters and high seas warnings.

Remarks:
LOCALLY DAMAGING wind gusts up to 100 kilometres per hour are being experienced with squally showers and storms in the northwest Darwin-Daly District and the Tiwi Islands.

GALES with gusts to 110 kilometres per hour are expected to develop between Daly River Mouth and Point Stuart, including Darwin and the Tiwi Islands, during Wednesday.

DESTRUCTIVE WINDS with gusts to 130 kilometres per hour may develop over the Tiwi Islands late Thursday if the cyclone continues to intensify.

HEAVY RAIN may cause widespread flooding in the northern Darwin-Daly District.
The Territory Controller advises residents from Daly River Mouth to Point Stuart including the Tiwi Islands that now is the time to make final preparations to your home shelter or identify which public emergency shelter to use.

Residents of Darwin and the Rural Area are advised that if you DO NOT have accommodation constructed to the Building Code or are unsure of your present accommodation you should decide which public emergency shelter to use. You should now have your emergency kit complete and ready. DO NOT PROCEED TO PUBLIC EMERGENCY SHELTERS UNTIL ADVISED TO DO SO.

The Territory Controller advises communities under Cyclone Watch that now is the time to put together your emergency kit, clear your yards and balconies, and commence home shelter preparations.

Name:  Tropical Low

Details:

	Time (CST)	Intensity Category	Latitude (decimal deg.)	Longitude (decimal deg.)	Estimated Position Accuracy (km)
0hr	10 pm February 15	tropical low	12.8S	130.6E	55
+6hr	4 am February 16	tropical low	12.5S	130.7E	85
+12hr	10 am February 16	tropical low	12.2S	130.7E	110
+18hr	4 pm February 16	1	12.0S	130.6E	140
+24hr	10 pm February 16	1	11.9S	130.5E	165
+36hr	10 am February 17	1	11.8S	130.2E	230
+48hr	10 pm February 17	1	11.8S	130.0E	285

The next Forecast Track Map will be issued by 2:00 am CST Wednesday