Infos - Advantages and disadvantages of the iPod video

By Romeo Bauer

The new iPod video became famous due to its huge memory and the capacity of playing video, due to its slim design and longer life battery. Still, there are voices that point out some disadvantages and highlight different negative aspects.

Taking into account that there are few perfect things made by the human hand, these aspects may be used by the iPod video creators for further improvements. Therefore, the customer's reviews are very important and the suggestions may be really taken into account.

The actuality which a shade is bigger is great, though an aspect is easy to scratch, aspect which is some-more in a cons category. Although a picture is glorious as well as a distinctness shade might be simply compared with a TV set's shade quality, there have been still a little problems with frozen video images. There is a good feat an actuality which a light, object or alternative prior obstacles have been annihilated, though an additional critical censure is unresponsiveness in a little cases.

The dimensions of the new iPod video are great, but there is no way you may watch it with more than several persons. Anyway, it was designed for individualized not collective needs and you may still share your photo album and music or video music preferences with one person. The flat screen is large enough to enjoy your favorite videos.

Although the life battery is longer, the complaints concern the short battery life for video. And this complaint may be balanced by the fact that the video is played with no flaw. The pros of the new iPod video are considered the cool look, the impressive number of features, the great organization of the music menu so that you may even rank your favorite songs. The cons of the new iPod video are considered the absence of FM option, the fact that no cradle is included, the impossibility of connecting the iPod video to the computer and the cost.

The extraordinary brand new facilities courtesy a receptive to advice peculiarity ? it is clearer as well as stronger with a drum which is stronger articulated, a receptive to advice is additionally louder than which of a prior generations. Alternative good facilities have been an easy control; a video underline is personal with "great", though a flaws courtesy a stop of a receptive to advice in between tracks, being blanked out. There have been still alternative suggestions per a battery life, receiving in to comment a volume of song which a brand new iPod video has.

The pros might be collected together indicating out a skinny as well as tasteful enclosing with a good display, a most appropriate sound, and 15-20 hours of music, brand new time as well as a time in alternative tools of a world. A cons prominence a incompleteness of a video formation which suggests a initial plan aspect, deficiency of a brand new games, no changes in a interface, a not as big shade than approaching generally for video facilities edition. An additional waste concerns a delayed send of photos approach from a camera.

Some critics point out the fact that the design and the features of the new iPod video may be seen from different perspectives. Therefore, the complaints and the satisfaction may be contradictory. These aspects may be seen from a movie lover perspective, an audiophile or photographer or even from a simple consumer with no great expectations. That is why you may find musician's reviews or video addicted reviews that are in contradiction. You may decide in which category you may be situated for deciding if the new iPod video is worth the money or not.

From the same point of view, you may say that as a music player the new iPod video has superior quality of sound. As a screen for the photo album, the clarity of the screen may win the competition with any TV set's screen. As a movie player, the iPod video is below the expectations, but it may be considered a great step in the video technology.

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Beamed Energy Propulsion: an Introduction

By Andrew V. Pakhomov

This brief note is about Beamed Energy Propulsion (BEP), which is, actually, a rocket science. However, you dont have to be a rocket scientist in order to understand what it is about, it is simple and I will explain it to you in next few paragraphs.

Rocket science is of course about rockets. What is so special about rockets? Motion on Earth is based on pushing from the environment, wherever the motion takes place. For example, cars use wheels to push from the pavement, birds use wings to push from air, and so on. Space is empty, so in order to fly in space every rocket has to use reaction principle, i.e. burn fuel, form exhaust gases and push from that exhaust in opposite direction. There is no air in space, so if you need to burn fuel, you have to carry burning agent together with the fuel onboard. Hence rockets has to carry onboard their fuel (hydrogen), oxidizer (oxygen) and everything that needed to burn hydrogen and keep the motion in desired direction (rocket engine).

So, the rockets are the only manmade vehicles that push away from their own exhaust and move that way. Rockets have to carry everything needed for motion in space onboard, is a heavy burden and it brings a great downside: price of cargo gets enormously high. If we can only separate the source of energy from a rocket, we will be rewarded with gigantic increase in efficiency!

Energy can be delivered to the rocket from remote external source using light or, say, laser, x-ray, microwave high-power beams. With its mirrors, rocket will collect and focus that beams on its "fuel". Any solid matter can be a fuel. When high-power beam of photons is focused on a solid material, the material evaporates and ionizes instantaneously. The energy density in focused high-power beam exceeds hundreds to millions times one in the heat of burning hydrogen. Thus, beam-driven rocket will remain a rocket, it will be pushing from its own exhaust, but the energy of this exhaust is much higher, and the rocket itself is much lighter, comparing to hydrogen burners.

Beam-driven rocket is equipped with beam-collecting optics (i.e. mirrors) and some relatively lightweight solid fuel. That is it: no more tanks, oxidizer, cryogenics, nozzles, lines, - the rest will be cargo. Such rocket will be a subject of 4P Principle, formulated by the founder of laser propulsion, Arthur Kantrowitz: Payload, Propellants and Photons, Period!

So, what is efficiency gain of beam-driven rocket vs. hydrogen burning rocket? Hydrogen burners cost us $10,000 per pound of a payload delivered to low earth orbit. Scientifically-proven calculations have shown that the price of space delivery per pound drops to minute $100 for laser-driven rockets: a hundredfold, revolutionary change in cost!

Laser propulsion, i.e. use of high-power lasers for satellite launches and in-space transportation is the most developed today branch of BEP. Various types of laser propulsion have been demonstrated in field and by many research groups in lab. Microwave propulsion is another relatively well explored part of BEP. Much less is known about potential of x-rays and particle beams for BEP. Overall, beamed-energy propulsion remains a field of future technology, where a lot of interesting development will happen in the next several decades. Still, it is quite clear, that in the future a great part of space transportation will be driven by high-power photonic beams.

About the Author:
Andrew Pakhomov is founder and president of American Institute of Beamed Energy Propulsion, a nonprofit scientific organization serving to development and popularization of this space technology of tomorrow AIBEP

He is also associate professor of physics at University of Alabama in Huntsville. To know more about current research on beamed energy propulsion, please visit official site of AIBEP