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How WiFi and Cell Phones Work | Wireless Communication Explained
 
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How does WiFi work? How do mobile phones work? Through wireless communication! How many of us really understand how wifi works and what goes on when you text your friend across the ocean. From your cell phone and they get the ping, almost instantaneously! Allow me to entertain you with a little thought experiment. When you press “send” on your favourite messaging app, where’s your message really going? Watch this video to know more about wireless communication. Science/Technology Questions this video answers: How does WiFi work? How do Cell Phones work? How do Mobile Phones work? How does wireless communication technology work? #WiFi #CellPhones #MobilePhones #WirelessCommunication
Views: 116906 The Explained Show
Communicating With Deep Space - How It Works | Video
 
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ESA employs 130 ton satellite dishes, dispersed in key areas all over the world to monitor the skies for transmissions. They boost faint signals from spacecraft and in reverse create high energy transmissions to relay commands. Credit: ESA
Views: 49501 VideoFromSpace
How Information Travels Wirelessly
 
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Understanding how we use electromagnetic waves to transmit information. License: Creative Commons BY-NC-SA More information at http://k12videos.mit.edu/terms-conditions
Views: 180925 MITK12Videos
Communications and Signals:Then and Now
 
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Take a look at how Communications and Signals systems have evolved over the last 100 years and played a pivotal role in railroad operations.
Views: 611562 Norfolk Southern Corp
Difference between Analog and Digital Signals & Technology
 
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We see both Analog and Digital devices around us. But have you ever observed the difference between them or what in particular makes them different. Well we do that in this video and discuss a lot of Science related to Signals, Waves and Music. We discuss about the future, Nyquist Rate and much more. ------------------------- Further Reading : https://en.wikipedia.org/wiki/Analog_signal https://en.wikipedia.org/wiki/Digital_signal http://www.linear.com/products/analog-to-digital_converters_(adc) https://en.wikipedia.org/wiki/Bit_rate https://en.wikipedia.org/wiki/MP3 -------------------------------------------- Thanks for watching. Please Subscribe the channel. Like and share this video. Catch us on Fb : www.fb.com/alldaySCI Catch us on Twitter : @alldaySCI Catch us on Instagram : alldaySCIENCE --------------------------------------------- Music Used : Italian Morning by Twin Musicom is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Artist: http://www.twinmusicom.org/
Views: 82089 Gyaanism
CBTC: Communications-Based Train Control
 
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Learn all about CBTC, the future of the New York City Subway.
Views: 457950 mtainfo
Satellite communication - Space technology has witnessed a phenomenal growth
 
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Space technology has witnessed a phenomenal growth, since the launch of man-made satellite Sputnik in 1957. One of the most significant applications of space technology has been in the field of communications. The people over world watch international events like Olympic games via satellite. A number of countries are using satellites for military communications, which include services to ships, air crafts and land mobile terminals. Several direct TV broadcasting satellite systems are also being used. Satellite communication is basically a microwave link repeater. A satellite receives energy from an earth station, amplifies it and returns it to each at a frequency about 2 GHz away from the uplink frequency (earth to satellite) . This prevents interference between the uplink and the downlink (satellite to earth). Satellite so used is a geostationary satellite which appears to be stationary at a given spot above the equator. Actually, it moves with the same angular velocity as the earth i.e. it completes one revolution per 24 hours and hence appears to be stationed over one spot on the globe. Satellite orbiting the earth will be geostationary when it is about 36,000 km away from the earth.A satellite in space links many earth stations. The user is connected to the earth station through terrestrial network. This network may assume various configurations including a telephone switch or a dedicated link to the earth station. Signal generated by the user is processed and transmitted from the earth station to the satellite. The satellite receives the modulated RF carrier at the pre-determined uplink frequencies from all the earth stations in the network, amplifies these frequencies and then re-transmits them back to earth at downlink frequencies. The downlink frequencies are kept different from the uplink frequencies in order to avoid interference. The modulated carrier received at receiving earth station is processed to get back the original baseband signal. This signal is then sent to the user through a terrestrial network. As per WARC (World Administrative Radio Conference) 1979 allocation, commercial communication satellites use 500 MHz bandwidth near 6 GHz for uplink transmission and use 500 MHz bandwidth near 4 GHz for downlink transmission. In actual practice, uplink of 5.725 -- 7.075 GHz is used while downlink of 3.4 -- 4.8 GHz is used. Prayaag Eduserv focuses to bring out educational digital contents in audio visual e-learning format, which is easy to understand and help the student remember as and when required. It relieves the student from cramming, memorizing the school text books.We thereby meet the unmet need of learning the school curriculum in multimedia format which makes the student motivated to learn deeper with ease, instead of learn by route. Our ultimate vision is to trigger creative imagination of the students to learn the content with enthusiasm. With the above mission in mind, we ventured to create Audio Visual Content for Tamilnadu State Board +2 Science & Mathematics. Each subject is given with animations, graphics, images, videos to help the students understand in a simple way. Number of academic experts who are leaders in the respective subjects worked hours &hours with visual communication technology experts to bring about an excellent collaborativeproject of educational ecosystem to achieve the best exam results. The DVDs are easy to use and hence the students enjoy learning. We have included Multiple Choice Questions (MCQ), Frequently Asked Questions (FAQ) plus solved Board Exam papers. To start with, we brought out Physics, Chemistry, Biology &Maths for +2 Tamilnadu State Board Syllabus in English. Soon we will have Physics, Chemistry Biology &Maths for +2 TN State Board Tamil medium students, as well. This long journey only just started. Our management is not only focused on the exam results but also on mind development of the students. As we progress we will bring out educational DVD's for +1 and 10th standard students for Tamilnadu State Board.The passion to benefit all the stakeholders including parents, students and teachers, driven us to center our attention on the art and the science of delivering client-delight. The unique feature of our DVD content is our natural,easy to understand voiceover which reflects closely the contents as mentioned in the respective text books and also explains the visual images very clearly. It is our endeavor and hope that all our efforts will help the students achieve their Educational Goal and also build job oriented career by preparing the students for engineering and other professional courses. Please contact us immediately to get your FREE sample of DVDs. [email protected]
Views: 107305 Prayaag Eduserv
What is microwave
 
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Michael Pangia, President and CEO of Aviat Networks, explains how microwave radio technology is used for high-capacity, extremely reliable point-to-point wireless communications.
Views: 19487 AviatNetworks
what is information and communication technology | what is ict | information technology management
 
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In This Tutorial you should know about what is information and communication technology or what is ict and information technology management Course Introduction: The course is aimed to provide an outline of computer, its uses, development, Components, Input, Output devices, hardware and Software. The course also covers fundamentals and use of ICT. Course Objectives: After completing the course the students should be able to: 1. Understand the role and importance of ICT in today’s society. 2. Identify various components of a computer system. 3. Understand basics of data communication and networking of computer system. 4. Understand basics of windows operating system and its functionality. 5. Understand basic concepts of multimedia and identify and use various multimedia components. 6. Understand basic concepts of computer languages. Course Outline: Unit 1: Introduction to ICT Introduction to ICT and definitions, ICT Application Examples, ICT as an AID to Computer teaching and learning. Unit 2: Overview and Organization of computers History and Development of Computer, Generations of Computer, Types of Computer, Classification of computer, Applications of Computer, Buses, Ports, Microprocessor, Main Memory, Motherboard of Computer system Secondary Storage Devices. Unit 3: Input Devices Keyboard Devices, Point and Draw Devices, Digitizer, Speech Recognition Devices, Data Scanning Devices (Image Scanner, OCR, OMR, BCR, MICR), Electronic Card Reader and Vision-Input system. Unit 4: Output Devices Monitor (Graphic Adopter, Size, Resolution, and Types of Monitors), Printers and Types (Dot-Matrix, Ink Jet, Drum, Chain/Band, and Laser), Plotters (Raster & Pen), Presentation Graphics, Special Function Terminal (ATMs, POSS), Multimedia Projector, and Voice Response Systems (Voice Reproduction System, Speech Synthesizer). Unit 5: Computer Software Introduction, How Software Works, Types of Software (Application and System Software), Software Installation, Uninstalling Software, Development of Software, Software Distribution. Unit 6: Operating System Introduction and Functions of an Operating System, System Performance Measure, Process Management, Some Popular Operating Systems, Microsoft Windows Practice (Start, Shutdown, Creating and Operating on the Icons, Opening Closing and Sizing the Windows, Using elementary job Commands like – Creating, Saving, Modifying, Renaming, Finding and Deleting a File, Creating and Operating on a folder, Changing setting like, Date, Time Color (back ground and foreground), Using Short Cuts, Using on-line help, Control Panel and its Usage, Concept of Task Manager, Setting up Network Connection and IP setting). Unit 7: Data Communication and Networking Data, Sources and types of Signals, Basic Elements of a Communication System, Data Transmission Modes, Data Transmission Media, Data Transmission Speed, Switching Techniques, Routing Techniques, Network Topology, Network Types, Communication Protocols, Network Interface Cards, Concept of OSI Model. Unit 8: Multimedia Introduction to Multimedia, Multimedia Components (Text, Graphics, Animation, Audio, and Video), Multimedia Applications (Multimedia Presentation, Foreign Language learning, Video Games, Special Effects in Movies, Multimedia Kiosk, Animated Advertisements, Multimedia Conferencing), Media Center Computer. Unit 9: Introduction to Computer Languages Introduction, Types, Characteristics, and Generations of Computer Languages, Concepts of Assembler, Compiler, Linker, and Interpreter. Basics of ICT (Information Communication and Technology) Course Code 1431 / 5403 (Bachelor Level) BA, B.COM, BLIS Aiou course code 1431 Basic of ICT complete Video Tutorial computer science online course Subscribe Us on Youtube: https://www.youtube.com/channel/UCiV37YIYars6msmIQXopIeQ