Assignment- educational technology 1 ppt print.pptx

educational

1. By CHANDRARAJ P SAGABAL Roll No 2

2. Computer Security Computer security, cybersecurity or information technology seciii itj (IT security ) is the protection of computer systems and networks lfC3lii the their hardware, sofJware, or electroniC rIcJIil, theft of car slam:age tc› il- h ¥¥JH as trc›rn the disruption or misdireclion of the scl'v ices llaey ;al ov rile

3. Interactivity Across the many fields concerned with interactivity, including information science. computer science, human-computer interaction, communication, and industrial design, there is little agreement over the meaning of the term "interactivity", but mos t definitions are related to interaction between users and computers and other machine s through a riser interface. Interactivity can however also refer to interaction between people. It nevertheless usually refers to interaction between people and computers — and sometimes to interao-tion between computer s — through software, hardware, and networks.

4. Collaborative Learning Collaborative learning is a situation in which two or more people learn or attempt to learn something together. Unlike individual learning, people engaged in collaborative learning capitalize on one another's resources and skills (asking one another for information, evaluating one another's ideas, monitoi ing one anothei's work, etc.)

5. Floppy Disk A floppy disk, also known as a floppy, diskette, or Silnply Jisk, ‘is a ty pe of tlisk storage composed of a disk of thin and flexible magnetic storage medium. seal*d in a rectangular plastic enclosure lined with fabric that removes dust pai\icles. Fl‹›ppi ‹1i.Wks are read and written by a oyyJ dirk drive (FDD).

6. DAFF E 180 Audio Video Tapes Videotape is magnetic tape used for storing video and usually sound in addition. Information stored can be in the form of eithef an analog signal or digital signal. Videotape is used in both video tape recorders (VTRs) or, more commonly, videocassette recorders (VCRs) and camcorders. Videotapes are also used for storing scientific or medical data, such as the data produced by an e lectrocardiogram.

7. CD DVD Compact disc (CD) is a digital optical disc data storage format that was co- developed by Philips and Sony and released in 1982. The format was originally developed to store and play only sound recordings (CD- DA) but was later adapted foi storage of data (CD- ROM) . Several other formats were further derived from these, including write- once audio and data storage (CD- R), rewritable medla (CD- RW), Video Compact Disc (VCD), Super Video Compact Disc (SVCD), Photo CD. PlctureCD, Compact Disc-Interactive (CD- i), and Enhanced Music CD. The frst commercially available audio CD player, the Sony CDP-lOI, was released October 1982 in Japan. DVD is Digital video dlsC.

8. Internet Internet users per 100 population members and GDP per capita for selected coimtries. The Internet (portmanteau of interconnected network) is the global system of interconnected computer networks that uses the Internet protocol suite (TCP/IP) to link devices worldn'ide. It is a near ork of networks that consists of private, public, academic, business, and government net orks of local to global scope, linked by a broad array of electronic, wireless, and optical networking technologies. The Internet carries a vast range of information resources and services, such as the inter- linked hj pertext documents and applications of the World Wide Web (WWW), electronic mail, telephony. ‹ind tile sharin*.

9. Internet of Things (IOT) The Internet of things (IoT) is a system of interrelated computing devices, mechanical and digital machines are provided with unique identifiers (UIDs) and the ability to transfer data over a network without requiring human-to- human or human-to- computer interaction

10. Overhead ector An overhead projector (OHP), like a film or slide projector, uses light to project an enlarged image on a screen. In the overhead projector, the source of the image is a page- sized sheet of transparent plastic film (also known as 'foils') with the image to be projected either printed or hand- written/drawn. These are placed on the glass surface of the projector, which has a light source below it and a projecting mirror and lens assembly above it (hence, 'overhead’). They were widely used in education and business before the advent of computer-based projection.

11. A projector or image projector is an optical device that projects an intage (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external piojection scieen.

12. Tablet PC A tablet computer, commonly shortened to tablet, is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and fiat package. Tablets, being computers, do what other personal computers do, but lack some input/output (I/O) abilities that others have. Modern tablets largely resemble modern smartphones, the only dikerences being that tablets are relatively larger Ian smartphones, wi% screens 7 inches (18 cm) or larger, measured diagonally, and may not support access to a cellular network.

13. A laptop(also Laptop computer) often called a notebook, is a small , portable personal computer with a clamshell from factor typically having a thin LCD or LED computer screen mounted on the inside of the upper lid of the clamshell and an alphanumeric keyboard on the inside of the lower lid. The clamshell is opened up to use the computer. Laptops are folded shut for transportation and thus are suitable for mobile use. Its name come from lap, as it was deemed to be placed on a persons lap when being used. Laptop PC

14. Desktop PC A des ktop Computer is a personal computer designed for regular use at a single location on or near a desk or table due to its size and power requirements. The most common configuration has a case that houses the power supply , motherboard( a printed circuit board with a microprocessor as the central processing unit (CPU), memory, bus, and other electronic components), disk storage(usually one or more hard disk drives , solid drives) a keyboard and mouse for input: and a computer monitor , speakers , and often a printer for output. The case may be oriented horizontally or vertically and placed either underneath, beside or top of desk.

15. ‘ S Radio is the technology of signalling and communication sung radio waves,. Radio waves are electromagnetic waves of frequency between 30 Hz and 300 Hz. They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves and received connected to another antenna.

16. g S J Satellite Communication A communication satellite is an artificial satellite that relates and amplifies radio telecommunications signals a transponder, it creates a communication channel between a source transmitter and a receiver at different locations on earth, communications satellites are used for television telephone, radio, internet and military applications. There are about 2000 communication satellite in Earth’s orbit, used by both private and government organisations.

17. ! Microscope A microscope is an instrument used to see objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using such an instrument . Microscopic means invisible to the eye unless aided by a microscope

18. A Webcam is a video camera that feeds or streams an image or video in real time to or through a computer to a computer network, such as the internet. Webcams are typically small cameras that sit on a desk, attach to a users monitor.

19. A digital library, digital repository, or digital collection is an online database of digital objects that can include text, still images ,audio, video or other digital media formats. Objects can consists of digitized content like print or photographs , as well as originally produced digital content like print or social media posts. In addition to strong content , digital libraries provide means for organizing, searching, and retrieving the content contained in the collection.