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Brief Guideline of Digital Video Editing: A Few Facts You Have to Get the Idea
Digital video editing is a common process necessary when transferring the motion pictures captured and stored by a camcorder in its memory unit. The system is known as non-linear editing and its main advantage is that it protects the stored data throughout the editing stages. Numerous software programs have been designed for the unique purpose of transferring and processing data stored on camcorders. During digital video editing, no modification occurs in the original source files.
Depending on what use you make of digital video editing, the software that operates the editing records and saves the user's decisions. You can create several files with versions of the original. Thanks to the editing tools available you can preview video files, change cuts or undo some of the modifications. Moreover, there is no risk of losing or altering the data during the editing process.
With non-linear digital video editing a major step has been made towards improving the flexibility of film editing. New possibilities have appeared in the editing of a certain material in standard-definition quality or in high definition broadcast quality. Both processes are quick and basic for regular PC applications. Thanks to this new opportunity that accompanies digital video editing, the costs for editing systems have dropped to such an extent that any home user has access to them now.
Digital video editing programs are directly incorporated into Apple computers and Microsoft operating systems. Yet, you can also use some free web applications that can be easily downloaded and use for advanced and amateurish digital video editing. A web browser interface could also serve for the editing of videos captured with a 3G camera. Digital video editing can be very rewarding and with minimum skills.
The picture and sound quality remain an important issue. Some of the initial features may be lost during the compression and decompression process specific to digital video editing. With the increase of the disk storage capacity and the improvement of the compression methods, part of these problems has been eliminated, but it all depends on the kind of video camera you use and the hardware drive on which the data is stored. Image modifications bring further challenges to digital video editing. Yet, with simple formats, quality should be preserved!
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Oscillation problem: A vertical spiral spring has its lower end attached to a fixed horizontal surface and the
Oscillation problem: A vertical spiral spring has its lower end attached to a fixed horizontal surface and theupper end carries a platform. Assume that the mass of the spring and the platform is negligible. The force required to produce unit compression in the spring is k.
A mass of mass m has been placed on the platform and equilibrium position is reached distance d below before placing the mass.
The mass is then pushed down through a short distance x, and released, and vertical simple harmonic motions take place.
If m=6.0kg and k=1000Nm^-1, calculate the maximum amplitude of the oscillation if the mass is just to remain in contact with the platform at all times. Explain carefully how you obtain your answer.
I don't understand the topic oscillations at all, please try to explain to me.
It's best to draw a picture first.
To solve use the law of conservation of energy:
(KE + PE)i = (KE + PE)f; (KE = kinetic energy, PE = potential energy, i = bottom, f = top)
PE = PEgravity + PEstring = mgh + 1/2kx^2; (x = distance streched)
(KE + PEgravity + PEstring)i = (KE + PEgravity + PEstring)f;
(1/2mv^2 + mgh + 1/2kx^2)i = (1/2mv^2 + mgh + 1/2kx^2)f;
KE = 0 at the bottom and at the top because v = 0;
let (PEgravity)i = 0, so that at the bottom, h = 0;
this gives us (PEgravity)f = mg(d + A);
Substituting, we have:
(0 + 0 + 1/2kx^2) = (0 + mgh + 1/2kx^2);
Replace the variables:
1/2kd^2 = mg(d + A) + 1/2kA^2; (A = Amplitude, g = 9.8 m/s^2 = gravity constant)
Plug in and solve!
(Your answer should be in terms of d)
Fuel Cell Compression Unit
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