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Audio Video Interleave (AVI) is a multimedia container format created by Microsoft as part of its Video for Windows (VFW) technology. AVI files can hold both audio and video data in a file container that allows simultaneous audio-with-video playback. AVI files support several streaming audio and video similar to the DVD video format. AVI is a common format for audio/video on the PC and can be supported by some standalone DVD players. It is not ideal for use as a general purpose container.

To play an AVI file on Windows the type of decoder on the computer must be determined to portray the video. AVI files consist of a property called a FourCC, which has four letters, determined by the kind of encoding used. VFW decoders then register particular FourCCs with Windows, letting it know that they can decode video in those formats

AVI files can be created with no compression, resulting in extremely large file sizes, but with no loss of quality from the input video to the saved file. This also requires no codecs to be installed, either for saving or playback; as such it is recommended to use a Lossless Compression format instead.

AVI files can be easily converted to DVD with the use of convertor programs available on the internet. One example is the Avi2DVD which is a graphic user interface that uses freeware tools and various freeware encoders or CCE to perform conversions. Other types of convertors are Convert Genius, Adobe Premier, Nero, and Pinnacle.

Things You Will Need

Computer with memory capacity for software download

AVI to DVD convertor

Internet access

AVI files

Instructions

1.Prepare the AVI files that are to be converted to DVD – create a folder for the files and place them there.

2.Download the conversion software to the PC and install it.

3.Once installation is complete, start the program and follow the directions for converting your files.

4.Save converted files in another folder for easy reference.

Dos and Don’ts

Ensure the conversion software selected can facilitate all elements of the AVI you wish to convert. For example the conversion of still pictures is not supported by all convertors.

Select a convertor that fits in with your requirements (features, price etc) and is still easy operate.

Ensure the converted video can play in a DVD player as well as on the computer.

http://www.howtodothings.com/computers/a3373-how-to-convert-avi-to-dvd.html

http://www.afterdawn.com/glossary/terms/avi.cfm

CDA which stands for CD Audio, is not an audio file format like MP3 or WMV. Rather, when an OS detects an Audio CD, it reads the basic information recorded on the CD, including the number of tracks, CD Text if available, total duration etc. To access the audio tracks, it also creates CDA labels, though the labels are not real files and are impossible to copy by selecting and dragging them. So to convert CDA to MP3, you will be required to rip your Audio CD, as CDA labels cannot be converted at all, as they contain no audio information.

Things you will need

AudioConverter Studio

Instructions

Download and install AudioConverter Studio to a known location on your computer. Run setup and follow the on-screen instructions to install the application.

Insert the Audio CD that you would like to convert to MP3. Open AudioConverter Studio. When the Wizard appears choose ‘Rip an Audio CD’ and then select ‘next.’

AudioConverter Studio offers the option to set output folder (1) and filename format (2). Use any folder on your computer; the filename format option will allow you to set a pattern for filename and folder names. That is your converted files can have user friendly names and sorted by folders according to artists, album name, etc. The information for filenames and folder names will be taken from CDDB, of from CD Text if present. Select ‘Next.’

Another wizard page will pop up; here, specify MP3 file as the output format, setting your specified MP3 bit rate as well. Note that they ‘prelisten conversion’ box, if checked, will make the software convert only a few seconds of each track. To convert full tracks, make sure that option is kept unchecked.

When the final page of the wizard pops up check all settings again, and if everything is OK, click ‘finish’ to rip the Audio CD. The converted MP3 will be found in the folder you previously specified.

Do’s

Remember that the trial version of AudioConverter Studio is fully functional for 30 says of the evaluation period. Beyond that time, you must buy it to use it.

Source

Mymusictools.com

MPEG-4 Part 14 or MP4 file format, or as it is formally called ISO/IEC 14496-14:2003, is a multimedia container format standard designated as a part of MPEG-4. It is prevalently used to store digital video and digital audio streams, specifically those defined by MPEG, but can also be employed to store other data such as subtitles and still images.

MPEG-1 Audio Layer 3, or MP3 as it is typically called, is a patented digital audio encoding format which uses a kind of lossy data compression. It is a widely used audio format for regular audio storage, as well as a de facto standard of digital audio compression for the transfer and playback of music using digital audio players.

There are instances when converting MP4 to MP3 may be wise, especially if you are using a digital audio player that does not support MP4 playback. To convert from MP3 to MP4 you may either choose to buy software that can do this conversion easily, you may also use free software that can be downloaded from the internet or you may use iTunes to carry out this function. When using iTunes you will have more control over the conversion as it will allow you to set the bit rate and overall sound quality. Below are a list of instructions that will help you to convert from MP4 to MP3 using iTunes.

1.Open the iTunes application.

2.At iTunes, select the song you would like to convert.

3.Go to your iTunes menu bar, select Preferences, alternatively you can press ‘Command’ and ‘comma’ keys, i.e. “?,”

4. At the Preferences window, select the ‘Advanced’ option:

5.At the ‘Advanced’ section, click on the button that says ‘Importing’ and then where it says ‘Import Using’, choose ‘MP3 Encoder’

6.Under Settings, choose ‘Custom’, you can choose any of the options there, but ‘Custom’ settings ensures you set the right bit rate.

7.If you’ve selected ‘Custom’, you will see ta window pop up; ensure that your Stereo Bit Rate and Sample Rate are to your desired settings, it is best to use a setting of 44.1 kHz for the best audio quality. If you are uncertain about custom settings then use the default settings.

8.Close the Preferences window; h before doing so ensure you have checked the correct song.

9.At the iTunes menu, select Advanced -> Convert Selection to MP3 and the conversion would start.

10.Once iTunes has completed the conversion, you will see two songs of the same title.

11.To confirm, select that song title and press the ‘?’ and ‘i’ keys to view the file information, and you should see a new window with the file details.

In the 1990s, the AVI and WMV formats were introduced by Microsoft. Since then both formats have been staples for computer internationally. AVI which stands for Audio Video Interleave, was introduced in the year 1992 and is technically known as a container format. being a container format, AVI can include both video and audio while allowing synchronous playback. AVI files can be found online as music videos, TV shows, streaming videos and even full length motion pictures. On the other hand, WMV stands for Windows Media Video and was developed by Microsoft specifically for streaming. However, WMV can also be saved to a hard drive or disk media for playback with Windows Media Player and other typed of players such as Winamp, DivX and VLC player. The file formats are widely used for two reasons, the first being, they are easily played in media players like Windows Media Player, that come bundled with the Windows operating system. Secondly, they are easy to compress and can be uploaded, downloaded or streamed via the internet. The process of converting AVI file formats to WMV file formats is relatively easy and it only requires conversion software.

Things you will need

Conversion Software

Instructions

Install and Open conversion software on your computer to convert either an AVI or WMV file.

Choose the type of conversion that you would like to achieve.

Load the AVI source file that you would like to convert to WMV. Usually the software will prompt you to browse of quickly select the file from a folder on your computer. A lot of applications will also allow you to drag and drop source files into the application window.

Name the destination file and make certain that it is saved into a specific directory.

Once you’ve completed steps 1 through four, you may choose between additional features. Each software will have its own features, so before using the software, look through the bells and whistles that the software offers.

Once you have made all your selections, you may begin the conversion process. The process should last between a minute to over an hour depending on the file size, the conversion specifics and the computer configuration.

When the conversion process is completed the software will notify you. You will receive an error message at the moment the error took place if a problem occurs. Open the media player of your choice and confirm that the file has been converted correctly.

Do’s

Be careful to select the correct | the relevant | the right} audio and video codecs; WMA for audio and WMV8/9 for a video are select} the best choice.

Be careful to select the relevant video size; usually the original size.

Also, make sure you choose the {right | correct | relevant} bit rate; for decent quality, use at least 128 kbit/s for audio and 768 kbit/s for video.

Keep the frames per second the same as the source file.

The term SCADA describes centralized systems which monitor and control sites, or complexes of systems distributed over considerable areas in other words anything between an industrial plant and a country. A majority of the control actions are executed automatically by Remote Terminal Units also known as RTUs”or by Programmable Logic Controllers also known as PLCs. Host control functions are typically restricted to basic overriding or supervisory level intervention. For instance, a PLC may control the flow of cooling water in a section of an industrial process, but the SCADA system may enable operators to alter the set points for the flow,and permit alarm conditions to be exhibited and recorded. The feedback control loop goes through the RTU or PLC, while the SCADA system monitors the complete operations of the loop.

A SCADA System is typically comprised of subsystems which include:

• A Human-Machine Interface or HMI which is the apparatus that presents process data to a human operator. In doing this, the human operator monitors and controls the process.
• A supervisory or computer system, which acquires data on the process and sends commands to the process.
• Remote Terminal Units or RTUs which connects to sensors in the process, converting sensor signals to digital data then sending digital data to the supervisory system.
• Programmable Logic Controller or PLCs which is used as field devices because they are more affordable, multi-purpose, flexible, and modifiable in comparison to special-purpose RTUs.
• Communication infrastructure which connects the supervisory system to the Remote Terminal Units.

There is some amount of bewilderment related to the disparities between SCADA systems and Distributed control systems or DCS. Essentially, a SCADA system normally refers to a system that coordinates, but does not actually control a set of processes in real time. The idea of real-time control is clouded in some way by newer telecommunications technology, enabling reliable, low latency, high speed communications over enormous areas. The disparities between SCADA and DCS are culturally determined and can generally be overlooked. As communication infrastructures with greater capacity are made available, the differences between SCADA and DCS will fail to be.

SCADA systems primarily incorporate a distributed database which is principally referred to as a tag database. This database is composed of data elements called tags or points. A point is representative of a single input or output value monitored or controlled by the system. Points can either be soft or hard. A soft point is the result of logic and mathematical operations applied to other points while hard point is representative of an actual input or output within the system. Points are generally stored as value-timestamp pairs: a value, and the timestamp when it was recorded or calculated. A series of value-timestamp pairs will give the history of that point. It is also typical to store extra metadata with tags, inclusive of the path to a field device or PLC register, design time comments, and alarm information.

The development of mobile technology can be traced back as early as the 1940s. Originally, two-way radios or mobile rigs were put in vehicles such as taxicabs, police cruisers and ambulances, but were not actually mobile phones because they were not generally connected to a telephone network. Essentially, the users of this early form of mobile technology were could not dial phone numbers from their vehicles. At first, mobile two-way radios were permanently installed in vehicles, but proceeding versions such as the transportables or “bag phones” were manufactured with a cigarette lighter plug so that they could also be carried, and therefore could be used as either a mobile or as a portable two-way radio. In the early part of the 1940s, Motorola developed a backpacked two-way radio, the Walkie-Talkie and later on created a large hand-held two-way radio for the United States military. The battery powered “Handie-Talkie” or HT was approximately the size of a man’s forearm. The technology would soon transcend the analogue Motorola DynaTAC prototype first used in 1973 to the three distinct generations of mobile phones that would each improve upon the technology. The generations are classified as 1G, 2G and 3G.

1G or 1-G specifically describes the first-generation of wireless telephone technology, mobile telecommunications. These were the analogue telecommunications standards that were put in place in the 1980s and continued until they were replaced by 2G digital telecommunications. The principal difference between the two mobile telephone systems, 1G and 2G, is that the radio signals that the 1G networks used were analogue, while 2G networks use digital radio signals.

In the 1990s, the second generation or 2G mobile phone systems including GSM, IS-136 (“TDMA”), iDEN and IS-95 or “CDMA” were introduced. In 1991 the first GSM network, Radiolinja, was established in Finland. 2G phone systems were characterized by digital circuit switched transmission and the use of advanced and fast phone-to-network signalling. For the most part, the frequencies that were used by 2G systems in Europe were higher than those in America. For instance, the 900 MHz frequency range was used for both the 1G and 2G systems in Europe, so the 1G systems were promptly shut down to make room for the 2G systems. In America the IS-54 standard was used in the same band as AMPS and displaced some of the existing analogue channels. The implementation of the 2G technology saw the introduction of smaller, more compact mobile phones. This modification was enabled because of technological improvements including more advanced batteries and more energy-efficient electronics.

SMS text messaging became a reality with the 2G network, initially on GSM networks and then on all digital networks. In 1991, the first machine-generated SMS message was sent in the United Kingdom. In 1993, the first actual person-to-person SMS text message was sent in Finland. SMS would very soon after its introduction, become the prefered method of communication for the youth. In fact, in most markets, a text message is prefered to using voice mail. The second generation also enabled users to access media content on mobile phones, when Radiolinja, now Elisa, in Finland introduced the downloadable ring tone as paid content.

Following the success of the 2G network the development of the third generation or 3G technology began. The creation of this newer technology paved the way for a myriad of different standards with different contenders promoting their own technologies. Unlike the 2G systems, the meaning of 3G has been standardized in the IMT-2000 standardization processing. This process did not necessarily standardize on a technology, but instead on a set of requirements (2 Mbit/s maximum data rate indoors, 384 kbit/s outdoors, for example). From then on, the original ideal of a single unified worldwide standard was demolished and several different standards have since then been introduced.

The first pre-commercial trial network using 3G technology was launched by NTT DoCoMo in Japan in the Tokyo region in May 2001. By late 2007 there were 295 Million subscribers on 3G networks globally, which represented 9% of the total number of people using mobile phones.

Stonehenge is likely considered the most significant prehistoric monument in Britain. It has attracted visitors for many years. It is a testament to the skill and dedication of the people who builtit many centuries ago.

The Stonehenge that stands in its present location is the final phase of its construction that was completed about 3500 years ago. The final stage was initiated soon after 1500 BC when the bluestones were altered into the horseshoe and circle that is viewable in the present. The original number of stones in the bluestone circle has been approximated to be around 60, many of these have been removed or destroyed. Some are currently mere stomps in the ground.

To Go To Stonehenge by Car

From Amesbury the directions are as follows: go 2 miles west on the junction of A303 and A344/360.

From London Gatwick Airport: take the M23 motorway and join the M25 motorway, following the signs for Heathrow Airport.

From London Heathrow Airport: follow signs to the M4 West then continue for about 2 miles and come off at junction 4b onto the M25 South bound.

From the M25, exit at junction 12 for the M3 motorway towards Basingstoke. Once you get on the M3 follow it to junction 8 signed A303 Andover. Then continue on the A303 all the way until you arrive at a roundabout. Go straight once you reach this point and 2 miles on bear right onto the A344 and the car park is on the right hand side about 500 metres on.

To Go To Stonehenge by Train

The closest train station to Stonehenge is Salisbury which is about 9.5 miles away. From London the trains depart from Waterloo Station to Salisbury. You should check for times and prices as these may be subject to change, additionally, the trains depart approximately every hour. The journey takes about an hour and a half.

To Go To Stonehenge by Bus

The buses depart from Heathrow Airport and from Victoria Coach Station in the centre of London. The journey takes just about 2 hours. You can get off at Amesbury. From there you can either walk (about 2 miles), catch a local bus, or get a taxi.

Addition

If you have a desire to visit the White House. There are a few things you will be mustdo and know when making your preliminary preparations.

Public tours of the White House are readily available to anyone who is a citizen of the United States. First a request must be made through your Member of Congress. Any request of this sort may be accepted as much as months in advance. These tours are self guided and are available from 7:30 a.m. to 11:00 a.m. Tuesday through Thursday, 7:30 a.m. to 12:00 p.m. Fridays, and 7:30 a.m. to 1:00 p.m. Saturdays. Tours, however, are not accommodated on federal holidays. Tour hours may sometimes be lengthened whenever it is feasible based on the official White House schedule. The tours are scheduled on a first come, first served basis. These requests, as mentioned earlier, can be submitted up to six months in advance but no less than 30 days in advance. You are unquestionably encouraged to submit your request as early as you can since a limited number of tours are available in any given period. All White House tours are one hundred percent free of charge.

If you are a not a United States citizen, then you will be expected contact your embassy in Washington, DC for more assistance in submitting a tour request.

It is said that all tours are substantially made that much better if you stop by the White House Visitor Center located at the southeast corner of 15th and E Streets, before or after you have completed your tour. The Center is open seven days a week from as a early as 7:30 a.m. Right up until 4:00 p.m. and features many details about the White House, including its architecture, furnishings, first families, social events, and relations with the press and world leaders, as well as a thirty-minute video. You will possibly need anywhere between 20 minutes to one hour to explore the exhibits in their entirety. The White House Historical Association also sponsors a sales area. Rest rooms are provided but there are no food services offered.

If you are scheduled for a tour and require the loan of a wheelchair you should inform the officer at the Visitors Entrance upon your arrival. However it is of importance to note that reservations are not possible. If you are using a wheelchair, or have any other mobility impairments, you will still use the same Visitors Entrance but will be escorted by ramp from the entrance level to the Ground floor, and then by the elevator from the Ground floor to the State floor.

There are special tours that have been established to accommodate the hearing and visually impaired.

If you have any questions or wish to find out about any last minute modifications to your schedule then you may call the 24-hour Visitors Office information line at 202-456-7041.

You will not be allowed to take certain items with you. These prohibited items include, but are not necessarily limited to, the following: handbags, book bags, backpacks, purses, food and beverages of any kind, strollers, cameras, video recorders or any type of recording device, tobacco products, personal grooming items (make-up, hair brush or comb, lip or hand lotions, etc.), any pointed objects (pens, knitting needles, etc.), aerosol containers, guns, ammunition, fireworks, electric stun guns, mace, martial arts weapons/devices, or knives of any size. The United States Secret Service maintains the right to restrict any other personal items. Umbrellas, wallets, cell phones and car keys are allowed.

Machu Picchu or as it is sometimes refered to, “Old Peak” is a pre-Columbian Inca site located 2,430 metres or 8,000 ft above sea level. It is to be found on a mountain ridge above the Urubamba Valley in Peru, which is 80 kilometres or 50 miles northwest of Cuzco and through which the Urubamba River flows. To many it is deemed “The Lost City of the Incas”. Machu Picchu is one of the most notable historical sites of the Inca empire.

It is in a subtropical zone. As a result of this the climate is mild, warm and damp, with temperatures averaging 130 degrees Celsius year round in the day. There are two notable seasons during the year. The first is the rainy season which spans from November to March. During this period there is a lot of heavy rain fall. The dry season occurs from April to October and is associated with higher temperatures. Tour guides will normally advise visitors to dress in accordance with the seasonal alterations.

Of the numerous things to be observed in Machu Picchu the flowers and animals that reside there are of particular interest. There are multiple varieties of animals and plants. The more common plant life in the historic reserve of Machu picchu is inclusive of pisonayes, q’eofias, alisos, puya palm trees, ferns and over 90 species of orchids.

Animals that may be observed in the reserve include the spectacled bear, cock-of-the-rocks or “tunqui”, tankas, wildcats and a awe-inspiring variety of butterflies and insects that are unique to the region.

The guided tour of Machu Picchu is initiated on a path that leads from the bus terminal. The path which was carefully designed to accommodate tourism enters the massive structure in the section that holds a set of rooms that are close to the outer wall. The path passes through a terrace and then into the agricultural zone just before entering the urban area.

The large is divided into two parts: the agricultural and the urban. There are main squares, temples, palaces, storehouses, workshops, stairways, cables and water fountains which run through both parts. The agricultural sector measures 20 hectares while the urban area measures 10 hectares.

Its complete architectural design was firmly based on Cuzco, which is the capital of the Inca empire. Machu Picchu was built in accordance with its natural surroundings. Its structure follows the natural curves and dips and rises that are evident in the land.

There is railway line that runs between the city of Cuzco and the station of Puente Ruinas or Machu Picchu. The trip begins in the station of San Pedro in Cuzco, after which the train makes it way up the Picchu mountain until it reaches the highest point an area called “El Arco” (in English the arch), located in the northwest part of the city. The route then goes down to the villages of Poroy, Cachimayo and lzcuchaca until it arrives at the Anta plains, which is a well known cattle area. It climbs down the gully of Pomatales before once again making a descent to the Sacred Valley of the Incas. At this part of the journey it arrives at the station of Pachar. The train will then make it last stop at Machu Picchu.

The Open System Interconnection Reference Model or OSI Reference Model or OSI Model is for the most part a conceptual description for layered communications and computer network protocol design. It was produced as part of the Open Systems Interconnection or OSI initiative. In its most fundamental form, it segments network architecture into seven distinct layers: the Application, Presentation, Session, Transport, Network, Data-Link, and Physical Layers. Because of this it is frequently referred to as the OSI Seven Layer Model. A layer is a collection of ideally similar functions that enable services to the layer directly above it and obtains service from the layer beneath it. On each single layer an instance provides services to the instances at the layer above and requests service from the layer beneath. An example of this relates to a layer that provides error-free communications across a network which then provides the path needed by applications above it, while it calls the next lower layer to send and receive packets that comprise the contents of the path.

Work on a layered model of network architecture was initialized in the year 1977. Around the same time the International Organization for Standardization or ISO started to develop its OSI framework architecture. OSI has two major constituents: an abstract model of networking, called the Basic Reference Model or seven-layer model and a set of specific protocols. It is vital to note that the standard documents that describe the OSI model can be freely downloaded from the ITU-T as the X.200-series of recommendations. A number of the protocol specifications can also be accessed as part of the ITU-T X series. The equivalent ISO and ISO/IEC standards for the OSI model are available from ISO, however not all of these are available free.

Every area of the OSI design evolved from experiences with the CYCLADES network, which also had a great influence on the design of the internet. The latest design has been meticulously documented in ISO 7498 and several of its addenda. In this latest model, a networking system is separated into layers. Within each layer, one or more entities establish its functionality. Each entity will interact directly only with the layer just underneath it, and enables facilities for use by the layer above it. Protocols will allow an entity in one host to interact with a corresponding entity at the same layer in another host. Service definitions ideally describe the functionality provided to an (N)-layer by an (N-1) layer, where N is one of the seven layers of protocols operating in the local host.

Neither the OSI Reference Model nor OSI protocols dictate any programming interfaces, other than a purposely abstract service specifications. Protocol specifications precisely define the interfaces between multiple computers, but the software interfaces within computers are implementation-specific.

Take for example, Microsoft Windows’ Winsock, and Unix’s Berkeley sockets and System V Transport Layer Interface, are interfaces between applications (Layer 5 and above) and the transport (Layer 4). NDIS and ODI are interfaces between the media in Layer 2 and the network protocol in Layer 3. Interface standards, with the exception of the Physical Layer to media, are estimated implementations of OSI Service Specifications.