Saturday, March 12, 2011

CrazyEngineers Forum

CrazyEngineers Forum

ANSYS Engineering Data

Posted: 12 Mar 2011 01:36 PM PST

Hello,

I will work on a project as a student in my university. I need to perform some ANSYS analyses with some polymers. As you know, I need to enter the mechanical properties of the material into ANSYS.

I found the website matweb.com and look for the material "165 H Polystyrene"
I could enter only the Density, Isotropic Elasticity, Tensile Ultimate Strength. I couldn't find where to enter the other values (mechanical properties). So, now I am not sure if these 3 properties are enough for a stress analysis. I know that matweb.com has a premium membership and it gives an Ansys ready engineering data file. Has anyone tried that? Or can anyone tell me that if these three properties are enough? I want to see what the premium membership available file has but the membership is $100/year (which is a little too much for this one time project)

thank you

The Real Hackers!!

Posted: 12 Mar 2011 09:52 AM PST

The Ultimate Hackers!! :happy:

Enjoy the video!!

'Share' With Me What's New On CE. Do You 'Like' It?

Posted: 12 Mar 2011 08:20 AM PST

I recently made few additions to the site. Anyone wants to 'share' what's new on CE and tell me whether you 'like' it?

:)

Single 'Post' Page

Posted: 12 Mar 2011 06:49 AM PST

CEans,

I'm wondering if someone can take this project. The idea is to simplify the 'posting' process for those who are new to forums. I'm thinking why can't we setup a separate page called 'Ask Question' which will -

1. Auto-Suggest proper section to the user based upon keywords entered in the title and post.
2. Offer full-fledged text editor to the user
3. Once the user submits the questions, it will create a new thread in the relevant section automatically with the poster's username.

Should be a simple PHP+JavaScript(ajax) project. What say you?

Volvo S60 Features

Posted: 12 Mar 2011 04:35 AM PST

Volvo's usually a known name in the luxury buses in India. Volvo's entered the high-end car market in India with Volvo S60. The price is Rs. 27,00,000/- (Ex. Showroom, Delhi).

The car's got stunning looks and interior. Has anyone had a chance to review the car specs, engine and performance?

Volvo's official site mentions following features -

1. Reworked Chassis: Gives the car lot of stability.
2. Sporty Design: Special aerodynamic design gives the car 'Sports Car' looks.
3. Turbo T6 Engine: Turbocharged T6 Engine produces 300 hp and 325 lb-ft torque.
4. Responsive Suspension: The suspensions have been designed to give the car maximum stability on curves.
5. Enhanced Safety: The car features new Pedestrian Detection Technology that keeps an eye on unexpected pedestrians crossing your path.

just curious..

Posted: 12 Mar 2011 02:46 AM PST

My classmates and I had talked about this..

can anyone tell me why the sea is salty??!:confused:

How to connect to postgre database using php in xampp?

Posted: 12 Mar 2011 02:46 AM PST

I am facing problem in connecting to postgre database in xampp

when try to execute the following script

It is showing me an unexpected error ie undefined function pg_connect()

Here is the script

<?php
$conexion = pg_connect("host=localhost port=5432 password=*** user=postgres dbname=***") or die('Can't connect!!!: ' . pg_last_error());
?>

Enter Yantrix!

Posted: 12 Mar 2011 02:42 AM PST

'Yantra' in the ancient Indian language of Sanskrit, means 'machine', a 'Yantrik' an inventor. Yantrix uses the power of creativity to empower your world with unique machines invented for novel applications.
I am Ashok Shenoy and Yantrix is my interface to the global village. I like to invent things and hence am always in R & D mode. I use electronics & computers as tools in my endeavor to be at my creative best.

I like to share knowledge and experience developed inventing products and consulting clients with others who are seeking the same for expressing their creativity and imagination.

I am powered by the idea: 'Better to be a Lion among men than a man among lions'

I am the inventor of the famous (it will be soon!) InventiKIT - A plug n' play prototyping kit.
Check out my blog: http://www.yantrix.com

about pn junction

Posted: 12 Mar 2011 12:54 AM PST

in pn junction , what s depeletion capactiance and junction capactiance

WebDev: Simple Login Tutorial Using PHP. (DB Less Version)

Posted: 12 Mar 2011 12:38 AM PST

Hi Friends,
Today I would like to say how to create a login system using PHP, without using Databases.

We need these files:
1. index.php - Index file, where your protected content and login form is there.
2. login.php - Login Form.
3. logout.php - Script for logging out.

Code: index.php
PHP Code:
<?php
session_start(); // Initiate the session
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
    "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <title>Welcome</title>
    <style type="text/css">
        * {font-family: Tahoma; font-size: 12px;}
        a {color: #0000ff; text-decoration: none;}
        a:hover {color: #ff0000;}
    </style>
</head>

<body>
    <?php
    if(isset($_SESSION["logged"])) // Check if the user had logged in.
        echo 'Welcome! <a href="logout.php">Logout</a>.';
    else // User did not log in.
        echo 'Please <a href="login.php">Login</a>.';
    ?>
</body>
</html>
Code: login.php
PHP Code:
<?php
session_start(); // Initiate the session.
$err = false; // Set an Error Flag.
if(count($_POST))
    if(isset($_POST["username"], $_POST["password"])) // See if the user has entered both username and password.
        if($_POST["username"]=="Admin" && $_POST["password"]=="LetMeIn") // Check for the correctness of both username and password.
        {
            $_SESSION["logged"] = true; // Set the session as authenticated.
            header('Location: index.php'); // Redirect the user to the home page.
            die(); // Stop the script.
        }
        else
            $err = true; // Username or password is wrong! Set error flag.
    else
        $err = true; // User didn't provide both username and password.
else
    $err = false; // User logs in for the first time.
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <title>Login</title>
    <style type="text/css">
        * {font-family: Tahoma; font-size: 12px;}
        label {display: inline-block; width: 75px; margin: 5px 0px; padding: 5px;}
        input {border: 0px; border-bottom: 1px solid #cccccc; width: 100px; margin: 5px 0px; padding: 3px;}
        form {text-align: center;}
    </style>
</head>

<body>
    <?php if($err) echo '<strong>Invalid Login! Provide all values!</strong><br />'; // If the error flag is set, display error message. ?>
    <form method="post">
        <div><label for="username">Username:</label> <input type="text" name="username" /></div>
        <div><label for="password">Password:</label> <input type="password" name="password" /></div>
        <div><input type="submit" value="Login!" /></div>
    </form>
</body>
</html>
Code: index.php
PHP Code:
<?php
    session_start(); // Initiate the session
    session_destroy(); // Destroy the session
    header('Location: index.php'); // Redirect the user to the home page
?>
Now keep all the files in the same folder... Ready to execute?

Execution
I personally recommend USB Web Server for fast food execution. Download it at Usbwebserver V8
Now copy the three files in the Root folder of USB Web Server and open the port http://127.0.0.1:8080/ in your favourite browser and enjoy. I have also attached the set of files, which I used with this post. :)

All the coding is documented. Even then if you have any queries, do shoot them out in the replies. :)

Download the files: Attachment 48
Attached Files

to build a Hydro alternator protection panel

Posted: 12 Mar 2011 12:34 AM PST

To all,
I have to build a protection panel for a 25 - 50KW hydro generator employing the following relays :
1. -ve sequence relay,
2. Earth fault relay
3. Over Vol. relay
4. Under vol. relay
5. Over Current relay
A single-Line diagram has been prepared.
Now i have to develop a ckt where i ll deliberately create a fault to know how the alternator ll behave i.e., 2 note down sum readings and develop associated characteristic curves.
I am in a fix here.
I ve 1 idea i.e., :
Let us say the alternator develops a 4A current (rated) and the over current relay shud trip at 4.5A current , for this i ll develop an extrnl current source and ll add to the current cumin 4m the alternator and ll pass thru relay. But i dont kno hw gud dis idea really is .??
:)

Power Engineer from Jadavpur Univ, Kolkata

Posted: 12 Mar 2011 12:15 AM PST

Hi this is Harish
pursuing my M.E. from Jadavpur Univ, Kolkata in Power Engg.
Hope to have gud help here ..!!
cheers 2 all da crazy engineers :):D

Let's learn music

Posted: 11 Mar 2011 10:29 PM PST

What is Music???
According to Merriam-Webster..Music is the science or art of ordering tones or sounds in succession, in combination, and in temporal relationships to produce a composition having unity and continuity

The first thing that we must learn in music is Musical Notation.
*Staff
It consist of 5 lines with four spaces between them


*Clefs
There are two kinds of clefs..the G clef/treble clef and F clef/bass clef

It is called G clef because it curls on the G line.

Above image is a treble staff. The staff begins with first line E and ends line F. In order to remember the notes on treble clef mnemonic devices are used,example on notes on lines: Good Boys Does Fine while on space: FACE

It is called F clef because it curls on the F clef.

Above image is a bass staff. The staff begins with first line G and end with G also. To remember the notes on bass staff mnemonic is used, example in line:Good Boys Don't Fight Anyone while on space: All Cows Eat Grass

Summer Internship in Infosys: Do they provide any?

Posted: 11 Mar 2011 10:07 PM PST

I just went through Infosys Global Internship Program.

They have mentioned that Students who are enrolled in our partner institutions can apply for this internship program called InStep.

Does Infosys provide internship for students of other institutions?
If no, why?

supermoon

Posted: 11 Mar 2011 10:01 PM PST

recently read in the paper that the " supermoon" phenomenon to occur on the 19 th of march. on this phenomenon the moon is nearest to the earth i.e. 2,20,000 miles. there is a belief that during this period volcanos erupt there are earthquakes and so on. this repeats after every 29 years. do you feel that the japan calamity is a warning of the supermoon??;)
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