Thursday, September 2, 2010

CrazyEngineers Forum

CrazyEngineers Forum

Difficulty in implementing video conferencing on Internet

Posted: 02 Sep 2010 12:56 PM PDT

I am B.E (C.S.E) Final year student, developing a project on E-Learning.
I have designed some modules like mail,e-library etc.
I was doing video conferencing in LAN.
I have little bit idea of implementing video conferencing on LAN by using Java Media Framework through RTP protocol,
but my teacher suggested me to do that on Internet i.e a student from any location should be able to do video conferencing with the teacher at server.
I don't have any idea how to provide video conferencing on Internet.:confused:
Please give me some idea about the same.

What steps I should follow?

What will be the H/W & S/W requirements for the project?

P.S:- My teacher clearly said that she cannot guide me in this project....:(

God did not create the universe: Hawking

Posted: 02 Sep 2010 12:00 PM PDT

British physicist Stephen Hawking has said that the creation of the universe was a result of the inevitable laws of physics and it did not need God's help.

In his latest book titled "The Grand Design", Hawking writes: "Because there is a law such as gravity, the universe can and will create itself from nothing. Spontaneous creation is the reason there is something rather than nothing, why the universe exists, why we exist."

God did not create the universe: Hawking - *International News ? News ? MSN India

What's your opinion?

Source: IANS, India Syndicate

Syncro geared ac motor

Posted: 02 Sep 2010 11:44 AM PDT

ٌWhat is it?
and where we can use it ?

Brief explanation of Quick Sort algorithm

Posted: 02 Sep 2010 09:32 AM PDT

On request of one user from ce,i am going to explain one of the most commonly used sorting algorithm ie quick sort

It is based on Divide and conquer approach.

It is one of the common practical example of recursion

There are generally 3 steps in this

1:-Divide a problem a multiple sub problems
2:-Solve them individually.
3:-Merge those sub problems to find solution of main problem

Algorithm

1. Choose any key element in an array which is know a pivot.
2. Reorder the array such that that all elements which are less than the pivot come before the pivot and so that all elements greater than the pivot come after it. After the partitioning, the pivot is in its final position.
3. Recursively reorder two sub-lists: the sub-list of lesser elements and the sub-list of greater elements.


Below is the program written in c++ ,it can help you for better understanding

//Program for Quicksort
#include<iostream.h>
#include<conio.h>
int partition(int a[],int,int);
void quick(int a[],int,int);
void main()
{
int *a,n,i;
cout<<"Enter size of array"<<endl;
cin>>n;
a=new int[n];
cout<<"Please enter elements for array"<<endl;
for(i=0;i<n;i++)
{
cin>>a[i];
}
quick(a,0,n-1);
cout<<"Elments are"<<endl;
for(i=0;i<n;i++)
{
cout<<a[i]<<endl;
}
getch();
}
void quick(int a[],int start,int finish)
{
if(start<finish)
{
int q=partition(a,start,finish);
quick(a,start,q-1);
quick(a,q+1,finish);
}
}
int partition(int a[],int start,int finish)
{
int x=a[finish],temp,temp1,j;
int i=start-1;
for(j=start;j<=finish-1;j++)
{
if(a[j]<=x)
{
i=i+1;
temp=a[i];
a[i]=a[j];
a[j]=temp;
}
}
temp1=a[i+1];
a[i+1]=a[j];
a[j]=temp1;
return (i+1);
}

How to Format mobile?

Posted: 02 Sep 2010 08:40 AM PDT

how to format mobile?
my mobile is of s 60 edition and i want to format it...
any suggestions?????

Why Frequency In some Countries is 60 Hz??

Posted: 02 Sep 2010 08:21 AM PDT

As per my record their are some countries in which power is transmitted @ 60Hz but with a voltage of 110V...

Please tell me why is it so????

Will it result in increase in increase Efficiency???
Or
Will it reduce the conductor requirement???
Or
Something else???

If somebody know this Please provide me the full information......
If you have any *.pdf Copy please provide it to me.........

Note: How to Upload A PDF copy here???
Answer: 1. Register Here
2. Upload your attachment their by Logging In....
3. Copy the Provided link and paste that link here......

I know, me giving you more trouble bye telling you to do this.......
But please do this, cause this question is giving much more Headache to me.....
Please help me.....
I will be very thankful to you.....

Regards,
VIPUL

Cambridge Wireless is discussing ‘Sensing from Radio’

Posted: 02 Sep 2010 08:10 AM PDT

CAMBRIDGE, UK – 2nd September 2010 – Cambridge Wireless announced today the latest presentation from the Joint Short Range Wireless and Wireless Sensing Special Interest Group taking place on 29th September 2010 at Murray Edwards College, University of Cambridge.

For more information, please visit www.cambridgewireless.co.uk/events

Wireless systems have been an invaluable part of sensing and telemetry. However, the radio system itself can be used for sensing and measuring things like location, medical phenomena, even the weather. This event will present a range of topics where wireless itself provides the transduction, and possibly the data carrier too. Topics will range from ultrawideband, spectrum monitoring, THz devices and CMOS and the latest Ofcom study results into wireless devices and much more.

Steve Edwards from Rohde & Schwarz, the sponsors for this event has this to say, "We value the opportunity to take part in events such as these as the collective expertise can often provide valuable insight and ideas that may contribute to future product development."

This event is an arena to discuss the latest developments surrounding this topic with the crème de le crème of the industry with the opportunity to debate the potential new avenues of development in the usability of radio.

Dr Soraya Jones, CEO of Cambridge Wireless says "This forum will open up the debate on the future business opportunities surrounding this field, tackling the core issues and providing a clear path for future commercial development."

Confirmed speakers include; Dr Andy Ward, Chief Technology Officer, Ubisense Ltd, Stirling Essex, Director of Business Development from CRFS, Dr Lorenzo Tripodi, Philips Research, Dr Steve Methley, Quotient Associates Ltd, Dirk Trossen, University of Cambridge and Eiman Kanjo of Cambridge Mobile Sensing.

This SIG is championed by Tim Whittaker of Cambridge Consultants, Peter George of Anritsu and Antony Rix of TTP from the Short Range Wireless SIG and Rob Blake of Philips Research UK, Dirk Trossen, University of Cambridge, Eiman Kanjo of Cambridge Mobile Sensing and Simon Loe of Alcatel Lucent of from the Sensing SIG.

Cambridge Wireless is also delighted to have Rohde and Schwarz support in sponsoring this event.

- ENDS -

Notes for editors follow

For Cambridge Wireless please contact:
Natalie Childs, Marketing and Events Executive, Cambridge Wireless
Tel: +44 1223 422 365
Email: admin[at]cambridgewirelesspdot]co.uk.
www.cambridgewireless.co.uk

About Cambridge Wireless
Cambridge Wireless is one of the world's leading wireless communities with a rapidly expanding network of companies interested in the application of wireless technologies. In addition to VIP Networking events, our activities are based around a number of Special Interest Groups (SIGs), each focussed on a specific technology and/or market area. SIG meetings provide opportunities for member organisations to meet, discuss developments in technologies and markets, showcase their capabilities, and explore opportunities for new business.

For more information visit: http://www.cambridgewireless.co.uk

Distributed on behalf of Cambridge Wireless by NeonDrum news distribution service (http://www.neondrum.com)

Problem in VB

Posted: 02 Sep 2010 07:24 AM PDT

Hi CEans,
I'm using Visual Basic 2008 express edition. While creating forms in projects, the form window appeared is not fit to the work space area. I have used maximize button also but it doesn't effects. Can anyone suggest me what to do?:confused:
And, there is an option in form property window that is "Start position". Does it have any link with the form size?

linux scheduler

Posted: 02 Sep 2010 05:22 AM PDT

can anyone tell me how to extract scheduler code from linux(ubuntu/debian) source code?

simple/good project topics

Posted: 02 Sep 2010 04:43 AM PDT

pls.i'm a final student of telecommunication option,i need a good/slmple project topics for my final year project.

Thevenin maximum power transfer theorem

Posted: 02 Sep 2010 03:52 AM PDT

In Thevenin maximum power transfer theorem it state that the load resistance,RL must be equal to internal resistance of the source,Rin. However, the efficiency of the circuit is just 50%. At here, can i say i use power source in a more effective way if be able to have an output of higher efficiency and at the same time considerable high output voltage but this output voltage will be slightly lower abit than when RL=Rin. The efficinecy will be higher alot if using RL>>Rin but the amount of output voltage will be extremely low. So in order to choose a load resistor give optimization to power saving and total output power, can consider it as a product of efficiency and total oputput power?

here i let X=efficiency*output power and consider a voltage source connected in series with an internal resistance and a load resistance,nRin where n is the value to be find.

efficiency=Pout/Pin=V^2[(nRin)/(Rin+nRin)^2]/V^2(nRin+Rin)=n/(1+n)
output power=v^2(nRin)/(n+1)^2Rin^2)=(V^2/Rin)(n/(n+1)^2)

hence X=n^2/(n+1)^3[V^2/Rin]
differentiate it with respect to n using UV method will finally get
dx/dn=[n/(n+1)^3][2-[3n/(n+1)]]
when dx/dn=0 n=0(rejected) and n=2
so at here, can i say if i take into consideration of power saving and the amount of output power dissipated, taking n=2 will give me what i want? a desirable high efficinecy and high output power.

Dark lines appearing in monitor screen ,when viewed through mobile camera

Posted: 02 Sep 2010 12:26 AM PDT

Might be you have observed,some dark lines appearing in monitor screen(mine is CRT) ,when viewed through mobile camera ...otherwise my monitor is working fine...

Why is it so??Any Electronic reason??

Use of biomass

Posted: 01 Sep 2010 11:02 PM PDT

Dear CEans,
We are here, boasting ourselves as members of developed nations and we simply turn a blind eye to facts. Now, I want you all to remember that we are engineers, if we do not think about it, who will.
Cities are the mirrors of our development statistics. The major challenge in cities is the wastes. In cities, you can find the cleanest places, and also the most hazardous. So, what can we use to curb the wastes in cities? can we use the biomass to power the city? lets discuss about this, we can bring on the change. Lets do it.

Should Companies Ask Jr. Employees To Sign 2 Year Bond?

Posted: 01 Sep 2010 10:53 PM PDT

Many leading companies, I've come to know, are asking engineering grads to join 2 year contract at the time of joining. The contract abides the new employees to continue the job with the employer for a minimum of 2 years. It's one-sided bond; meaning the employer can terminate the employment but the candidate cannot.

I've heard that this is done because the employers spend considerable money and efforts on new joinees in training them for projects. Lot of recruiters eye these 'trained employees' and offer them a slightly higher package and thus save the whole cost of training them.

But this may work against the candidates in many cases. For example, if the employer doesn't offer work in the domain of candidate's interest, the employee is bound to get frustrated and stuck up in job for minimum 2 years. Or worse, if the employer does not have a project the candidate is made to be 'on bench' for months! That ruins future career prospects for the candidate.

What's your take on this?

Happy Birthday CEan MayurPathak

Posted: 01 Sep 2010 10:05 PM PDT

CEan MayurPathak celebrates his birthday today. Let's wish him many happy returns of the day and hope he returns to CE :p

:happy::happy::happy::happy:
Happy Birthday Mayur
:happy::happy::happy::happy:
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