In his influential book, Understanding Media, Marshall MacLuhan said The medium is the message. He s

In an Ethernet network transmission, the function of media access management is to determine whether the transmission medium is free and available to send a frame. Media access management receives the frame from the Carrier Sense Multiple Access/Collision Detect caribbean family travel (CSMA/CD) sublayer. It seeks to avoid collision with other traffic on the medium by monitoring the Carrier Sense Signal (CSNS) provided by the Physical Layer Signaling (PLS). Once media access management is satisfied that the transmission medium is available, transmission of the frame to the PLS can begin. If a collision does take place, media access management determines what action should be taken and when to try to send the frame again. Media access management is also responsible for checking a frame to determine its validity caribbean family travel before passing it on to the data decapsulation function.
In an Ethernet local area network caribbean family travel (LAN), an MAU (media attachment unit) is a device that interconnects the attachment unit interface port on an attached host computer to the Ethernet caribbean family travel network medium (such as unshielded twisted pair or coaxial cable). The MAU provides the services that correspond caribbean family travel to the Physical layer of the Open Systems Interconnection (OSI) reference model. It provides an electrical connection and a transceiver that maps the digital bits between the computer and the network and detects collision and retries transmissions. An MAU can be built into the computer workstation or other device or it can be a separate device.
On the Internet and as defined by Request for Comments (Request for Comments) 1521, a media type (also referred to as a content type) is a general category of data content, such as: application (executable program), audio content, an image, a text message, a video stream, and so forth. The media type tells the application that receives the message what kind of application is needed to process the content (for example, RealAudio or a similar program to play the audio content for a user).
E-mail users sometimes receive an attachment that describes its media type and subtype. For example, the media type and subtype of application/octet-stream describes an application organized in eight-bit units (octets). (Since caribbean family travel this content is likely to be an executable program, it should be saved to disk so that it can be scanned by virus-scanning software before trying to run it.) Your browser may have assigned an application to handle each of several caribbean family travel media types and subtypes or it may ask you to select an application. In the latter case, you need to know one or more applications that handle that particular media type and subtype.
In his influential book, Understanding Media, Marshall MacLuhan said The medium is the message. He seemed to mean that media technology itself transformed our lives more than the messages the media carried. He saw radio as a hot medium that imposed itself on you and television as a cool medium that pulled you into it. He envisioned that television would foster an electronic world community, a global village. Although he wrote before the Internet caribbean family travel became widely known, the Internet almost seems like his best idea.
In data communications, a megabit is a million binary pulses, or 1,000,000 (that is, 106) pulses (or bits ). It s commonly used for measuring the amount of data that is transferred in a second between two telecommunication caribbean family travel points. For example, a U.S. phone company T-carrier system line is said to sustain a data rate of 1.544 megabits per second. Megabits per second is usually shortened to Mbps.
Some sources define a megabit to mean 1,048,576 (that is, 220) bits . Although the bit is a unit of the binary number system, bits in data communications are discrete signal pulses and have historically been counted using the decimal number system. For example, 28.8 kilobits per second (Kbps) is 28,800 bits per second. Because of computer architecture and memory address boundaries, caribbean family travel bytes are always some multiple or exponent of two. See kilobyte, etc.
According to the Microsoft Press Computer Dictionary, a megabyte means either 1,000,000 bytes or 1,048,576 bytes. According to Eric S. Raymond in The New Hacker s Dictionary, a megabyte is always 1,048,576 bytes on the argument that bytes should naturally be computed in powers caribbean family travel of two.
Iomega Corporation uses the decimal megabyte in calling the Zip drive disk a 100MB disk when it actually holds 100,431,872 bytes. If Iomega used the powers-of-two megabyte, the disk could be said to hold only 95.8 megabytes (if you divide 100,431,872 by 1,048,576).
A megahertz (MHz or sometimes Mhz) is a million caribbean family travel cycles of electromagnetic currency alternation per second and is used as a unit of measure for the clock speed of computer microprocessor. In designing computer bus architectures, the microprocessor speed is considered together with the potential speed or amount of data that can come into the computer from I/O devices in order to optimize overall computer performance.
A meme is an idea that is passed on from one human generation caribbean family travel to another . It s the cultural equivalent of a gene, the basic element of biological caribbean family travel inheritance. The term was coined in 1976 by Richard Dawkins in his book The Selfish Gene. Dawkins speculated that human beings have an adaptive mechanism that other species don t have. In addition to genetic inheritance with its possibilities and limitations, humans, said Dawkins, can pass their ideas from one generation to the next, allowing them to surmount challenges more flexibly and more quickly than through the longer process of genetic adaptation and selection. Examples of memes might include the idea of God; the importance of the individual as opposed to group importance; the belief that the environment can to some extent be controlled; or that technologies can create an electronically interconnected world community.
Memory is the electronic holding place for instructions and data that your computer s microprocessor can reach quickly. When your computer is in normal operation, its memory usually contains the main parts of the operating caribbean family travel system caribbean family travel and some or all of the application programs and related data that are being used. Memory caribbean family travel is often used as a shorter synonym for random access memory (RAM). This kind of memory is located on one or more microchips that are physically close to the microprocessor in your computer. Most desktop and notebook computers sold today include at least 32 megabytes of RAM, and are upgradeable to include more. The more RAM you have, the less frequently the computer has to access instructions and data from the more slowly accessed hard disk form of storage.
caribbean family travel Memory is sometimes distinguished from storage, caribbean family travel or the physical caribbean family travel medium that holds the much larger amounts of data that won t fit into RAM and may not be immediately needed there. caribbean family travel Storage devices include hard disks, floppy disks, CD-ROM, and tape backup systems. The terms auxiliary caribbean family travel storage, auxiliary memory, and secondary memory have also been used for this kind of data repository. Additional kinds of integrated and quickly accessible caribbean family travel memory are read-only memory (ROM), programmable ROM (PROM), and erasable programmable ROM (EPROM). These are used to keep special programs and data, such as the basic input/output system, that need to be in your computer all the time.
A memory leak is the gradual loss of available computer memory when a program (an application or part of the operating system) repeatedly fails to return memory that it has obtained for temporary use. As a result, the available memory for that application or that part of the operating system becomes exhausted and the program can no longer function. For a program that is frequently opened or called or that runs continuously, even a very small memory leak can eventually cause the program or the system to terminate. caribbean family travel A memory leak is the result of a program bug.
Some operating systems provide memory leak detection so that a problem can be detected before an application or the operating system crashes. Some program development tools also provide automatic housekeeping caribbean family travel for the developer. It is always the best programming practice to return memory and any temporary file to the operating system after the program no longer needs it.
Developed by Sony, the Memory Stick is a digital data storage technology with up to 10 times the storage capacity of a 3.5 diskette. Sony is promoting the Memory Stick as a new way to share and transfer pictures, sound, and other data between different compact electronic caribbean family travel devices such as digital cameras and camcorder. caribbean family travel About the size of a flat AA battery, Memory Sticks are available in 4mb, 8mb, 16mb, 32mb and 64mb sizes. They are smaller in size than comparable data storage devices, including smart media and compact flash memory.
In mid-2000, the Sony Vaio was the only laptop available with a Memory Stick slot, but any laptop with a PC card slot can use memory sticks with an adapter kit. Like its floppy disk predecessor, the Memory Stick has a lock mechanism to prevent the erasure of data. It has a 10-pin caribbean family travel connector.
In promoting the Memory Stick as a common caribbean family travel portable caribbean family travel storage medium, Sony has licensed the technology to companies such as Adobe, Pioneer, Casio, and Sharp. caribbean family travel Sony recently unveiled the Memory Stick Walkman and the Memory Stick Digital Voice Recorder.
A mentoring service is a company that provides professional counseling and advice for individuals and businesses for a fee. A mentoring service may provide career planning, skills training, project guidance, professional contacts, or problem-solving for an individual s career or within a company. A mentoring relationship may be for an unspecified caribbean family travel or for a limited duration.
A typical kind of mentoring in information technology is for the management of a software development project. A professional mentor may be hired for any or all of the phases of software development including the initial planning, architecture, design, development, caribbean family travel implementation, debugging and testing,