31st
05 -
2011
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The MP3 is a complete godsend for anyone who enjoys and appreciates good music. Not only does it afford users the convenience of purchasing music online and ripping from purchased CDs, it also provides the utmost ease in portability. There are more MP3 players on the market than I can name. These players allow you to download hundreds and in some cases thousands of MP3’s to take along with you anywhere. I create MP3 CD’s containing up to 120 of my favorite songs for my listening pleasure in my car. But how can so many audio files get stored on my 800MB (Megabyte) CD?
MP3 Encoders and MP3 converters are the software that creates MP3s by using an MP3 compression and decompression algorithm. For example, an average 3 minute WAV file can be as large as 15MB. Using MP3 encoders and MP3 converters, a large WAV file can be cut down to a much smaller and more portable MP3 file of about 3MB.
MP3 stands for MPEG Audio Layer 3. At layer 3, psychoacoustics principles are used to find and remove all unnecessary sound data, leaving behind only the crucial audio data. By unnecessary sound data I mean all of the stuff that we humans don’t hear anyway. Most people can’t hear sounds above 16 kHz so why would you want it hogging your disk or hard drive space? Non-music audio such as speeches, sermons, audio books and comedy albums, can be reduced even less based on this.
Compression occurs after the essential data has been separated from the redundant data. At this stage, the same amount of data can be stored using fewer bits and less space. The bit rate is the ratio of the number of bits transferred between two devices per second. The higher the bit rate, the higher the sound quality. The lower the bit rate ratio, the lower the sound quality. 192 Kb/s is the most popular bit rate used in peer-to-peer networks. For the most part, MP3 converters and encoders today use variable bit rates. This allows for much better quality audio because the bit rate conforms to the dynamics of the audio frames being stored which in turn keeps more of the important music data.
There are dozens of MP3 compressor and encoder software programs available online and at stores. Some of the main encoding engines are: LAME, Blade Enc, Fraunhofer Encoders and Xing. Deciding which MP3 encoding engine technology is right for you depends on your individual needs and preferences. Blaze Media Pro is an excellent option if you’re looking for a powerful, yet easy to use, all-in-one multimedia solution.
31st
05 -
2011
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comment closed
The technology of surveillance equipment is continuing to advance at a very rapid pace. As a result surveillance equipment has become almost ubiquitous in retail stores, public schools, gas stations, and airport terminals all across the United States. There is a wide range of surveillance technology that is available on the market. Surveillance equipment ranges from wiretapping phone and internet based equipment to high tech facial feature recognition computer software known as biometrics.
Surveillance equipment makes the world infinitely more manageable for people who need to protect their belongings and protect people and make its far more difficult for people who actually want to commit crime. As more of the high-tech surveillance equipment becomes more and more easily available to the general public and small business owners, more and more people will reap the benefits.
The basic concept that underpins a piece of surveillance-equipment is one of ‘you will be seen’. The gist of it is that criminals may well think twice about committing a crime if they think they might be seen, identified and then found later on and be charged with a crime. Although it is unlikely that everything can be caught on surveillance camera at one time, on the occasions when surveillance does pick up activity, it does provide enormous help to security and police in identifying the offenders.
These days the more advanced surveillance equipment operates in the same way in an effort prevent crime from occurring, so it has not veered from its original intent. Indeed many small businesses decide to install dummy cameras that don’t actually record anything, indeed don’t even turn on, but act more as a preventative measure for potential offenders.
One of the main reasons for the establishment of surveillance equipment is to prevent the theft of merchandise from stores and warehouses. Usually offenders come from outside the company and so the theft can be caught on tape and referred to the police. But on occasion the offender will actually come from within the company and then employee policy needs to be implemented. Upon discovering the internal offender that employee will usually find themselves without a job.
Apart from the examples outlined earlier, shopping malls, parking garages, office buildings, and warehouses and financial institutions all now commonly use video based surveillance equipment in order to protect their wares and to also to limit the costly losses incurred by dishonest employees. Major department stores who have high internal theft rates use these video surveillance systems to actively prosecute thieving employees.
31st
05 -
2011
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comment closed
When you want to move nearly any part of your body, you do it using muscles. Whether you are moving your fingers, toes, arms or legs, muscles do the work. Even when you stick your tongue out, you do it using muscles:
1> You think about moving some part of your body
2> The appropriate muscles contract
3> That part of the body moves
Muscles let you move your body voluntarily with precise control.
The penis, on the other hand, is completely different. There are no muscle contractions involved in making the penis erect. To become erect, the penis instead uses pressure.
Probably the easiest way to understand how the penis becomes erect is to think about a balloon. If a balloon has no air in it, it is limp. As you inflate a limp balloon with just a little air, it becomes elongated and rigid.
The penis uses a similar mechanism, but instead of using pressurized air to become rigid, the penis uses pressurized blood. The penis contains two cigar-shaped structures, called corpus cavernosa (singular – corpus cavernosum), that it uses to become erect.
Think of the corpus cavernosa as balloon-like tubes. Arteries bring blood into these two tubes, and veins carry blood away from them. The penis can be either limp or erect, depending on the flow of blood:
1> In a non-erect state, the arteries that bring blood into the corpus cavernosa are somewhat constricted, while the veins that drain the blood from the penis are open. There is no way for pressure to build inside the penis. In this state, the penis is limp.
2> When a man becomes aroused, the arteries leading into the penis open up so that pressurized blood can enter the penis quickly. The veins leaving the penis constrict. Pressurized blood is trapped in the corpus cavernosa, and this blood causes the penis to elongate and stiffen. The penis is erect.
If the arteries leading to the penis do not open up properly, it is difficult or impossible for a man to become erect. This problem is the leading cause of erectile dysfunction.
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