What is a good tweet frequency? | Forum Promotion

I would say it depends on what you are actually trying to push on Twitter, but where I work for example, our rules on Twitter are 4-6 per day, if possible with a few days with more and a few less. I personally try to stick to five. I like to work according to the rule of 80% informative, 20% feasible. Five makes it easier for my weak brain to keep track.

Data Structures – Given node and given value determine the frequency of the given value from node to root in a tree

A tree with N Vertices and N-1 Edges is present.

A value x can be inserted in each of the nodes.

A single node can contain multiple values.

How do I answer inquiries of the specified type?

Given a knot n and value v Find the frequency of v on the way from the knot n to the root of the tree.

Mobile Network – Can Android KitKat be bound to a specific frequency / band in any way?

Usually we can set our mobile phone in the setting to either LTE, WCDMA or GSM mode. But I want to lock specifically the 900MHz and / or 1800MHz band, which they contain as GSM in Network Mode. Then my question is: is there a way to do this? Preferably, if I can only execute commands or scripts without installing an application. But even a thorough application is fine.

c – Determine the frequency of unique array elements using a single pointer

I am supposed to find the frequency of the unique array elements of a character array via a user-defined function int * unique (char * s)that takes a pointer to a character and returns a pointer to a dynamically assigned array of integers.

There are some limitations. I can not use an extra array or array indexing. Only pointer arithmetic is allowed. My solution is as follows:

 int *uniqueCount(char *s)
int a=0,k,p;
        if(*(s+k)==*(s+p)) break;
    if(*(s+p)==0) a++;
int *arr,i=0;

Some problems that I face with my function:

(I) Use of the function in an actual program, eg. Receiving the returned integer pointer and printing values.

(Ii) I change the array element in "*" in the second part of the function. I want to avoid it.

I know that I have made a complex function difficult to understand. If there is an optimized and simpler solution, this would be helpful.

Thank you very much...

Fourier analysis – Determination of frequency components using FFT

The function defined below has three frequencies 2, 4, and 10. How can the Fourier transform (FFT) be used to display these frequencies?

   myfun(t_) = 
 1/(2 Sqrt(
   2)) ((Sqrt)Abs(
     3 + Cos(4 t) - 
      4 Cos(2 t) (-1 + 
         E^(-0.018` t) (Cos(9.99999594999918` t) + 
            0.0009000003645002213` Sin(9.99999594999918` t))^2) + 
      4 E^(-0.018` t) (Cos(9.99999594999918` t) + 
         0.0009000003645002213` Sin(9.99999594999918` t))^2))

Fourier analysis – Fourier transform frequency

One possibility is the FourierParameters

  FourierTransform(1, x, w, FourierParameters -> {0, -2*Pi})

Mathematica Graphics

  FourierTransform(Exp(I a x), x, w, FourierParameters -> {0, -2*Pi})

Mathematica Graphics


funs = {1, DiracDelta(x), Exp(I a x), Cos(a x), Sin(a x)};
result= {#, FourierTransform(#, x, w, FourierParameters -> {0, -2*Pi})}& /@ funs;
Prepend(result, {"f(x)","Fourier transform unitary, ordinary frequency"});
Grid(%, Frame -> All)

Mathematica Graphics

With wikis second column:

Mathematica Graphics

Hand luggage – Is it safe to travel with a Radio Frequency Board (RF) packaged in a laptop carry-on bag?

Next to a laptop
I use a radio frequency (RF) board to implement a software-defined radio function (eg virtual eNode-B or gNode-B) with a small plug-in omnidirectional antenna.

Would that be a problem when transferring to an airport when stowed in hand luggage with a laptop?

For information:
It is a USRP of Ettus Research Group of National Instruments.