The Fourth Dimension Mohammed Alqahtani cs 525 spring

The Fourth Dimension Mohammed Alqahtani -cs 525 - spring 2010 1

When? Dimensions concept since 1800 s. Some people assumed that 4 D is the time. Scientists, Psychologists, Philosophers as well as Spiritualists also take interest in the fourth Dimension. Mathematicians and Physicists use the 4 th dimension in daily calculations to illsuratw some of the universe. Mohammed Alqahtani -cs 525 - spring 2010 2

What is the 4 th Dimension? Some believe it is time. Scientists “ Mathematicians “ believe it is a direction different from all direction in the real life. Mohammed Alqahtani -cs 525 - spring 2010 3

First Dimension object = only one of the fundamental units. X i. e. a line only has length. Mohammed Alqahtani -cs 525 - spring 2010 4

Second Dimension Object = two of the fundamental units. Y i. e. a square has a length and a width. X Mohammed Alqahtani -cs 525 - spring 2010 5

Third Dimension 3 D object = three fundamental units. i. e. a cube has a length, width and height. Mohammed Alqahtani -cs 525 - spring 2010 6

The fourth Dimension 4 D object = four fundamental units. . i. e. a hypercube has a length, width, height and a fourth dimension that is perpendicular to all three of the other units. Mohammed Alqahtani -cs 525 - spring 2010 7

What we see in our universe ? Our universe is 3 D , our eyes actually only see in 2 D. Our retina has only a 2 D surface area with which it can detect light coming into our eye. So the picture we see is not 3 D, but a 2 D projection of the 3 D universe we are looking at. Mohammed Alqahtani -cs 525 - spring 2010 8

Can we see The 4 th Dimnesion ? Our eyes can’t see the 4 D picture except by using some technologies , help human eyes see the 4 D , but the picture we’ll see then is 3 D being project of the 4 D objects. Mohammed Alqahtani -cs 525 - spring 2010 9

Why we care ? 4 D visualization has a wide variety of useful applications. Mostly , they aims to see the inner 3 D objects which is inside the 4 D. 4 D cinema or movie isn't really 4 D , it’s combination of 3 -D film with physical effects synchronized with film in theatre , i. e. 4 D Avatar. Mohammed Alqahtani -cs 525 - spring 2010 10

4 D Ultrasound 4 D ultrasound is a medical ultrasound technique, used in medical filed , providing 3 D images of the fetus. Send waves Receive returned echoes Program recognize the frequencies echoes by use the mathematic theory of 4 D to create the 3 D image , it can be live by keep sending courteously. Mohammed Alqahtani -cs 525 - spring 2010 11

4 D ultrasound Mohammed Alqahtani -cs 525 - spring 2010 12

4 D radiotherapy • Radiotherapy : aimed to use cancer’s treatment to treat or help to discovre. • Most common cancer types. Based ob on the tumor type, location, and stage , health conditions of the patient. • The process : 4 D imaging treatment planning treatment delivery Mohammed Alqahtani -cs 525 - spring 2010 13

Questions ? Mohammed Alqahtani -cs 525 - spring 2010 14