one-to-one private networks based on personal handshaking‚ device personalization‚ security are enabled by the redtaction. WORKING PRINCIPLE • “RedTacton” takes a different technical approach. Instead of relying on electromagnetic waves or light waves to carry data. • RedTacton uses weak electric fields on the surface of the body as a transmission medium. • “RedTacton relies upon the principle that the optical properties of an electro-optic crystal vary according to
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WORDS - 1‚829 A personalised induction will always be more effective In this essay I will be looking at the benefits of creating a personalised induction as well as looking at certain circumstances to support an argument against it. I will be discussing the influence and application of the different modalities when creating an induction as well as briefly exploring how the brain uses information‚ and discussing whether or not a personalised induction is the most effective method to use
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Introduction The purpose of this experiment is to conclude the concentration of an unknown solution using colorimetry to plot a calibration curve. Colorimetry measures the absorption of light at wavelengths within the visible region of the electromagnetic spectrum. It can be used to identify the unknown concentration of a solution in reference to a solution of a known concentration. When a solution appears coloured‚ you see the colour that has not been absorbed by the molecules. A light beam
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AVT 123 (Aircraft Communications/SATCOM) Communication The sending of a message via medium to a receiver Feedback – a response or one that sets such a process in motion; a reply or reaction to a stimulus. Hindrances to communication Noise Language Barrier Weather Surroundings Language/Sound Barrier Media Failure Telecommunication TELE – Greek word…… at a distance The sending of a message through a medium to a receiver at a distance; involved the use of machines
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M12/4/PHYSI/HP3/ENG/TZ2/XX 22126515 Physics Higher level Paper 3 Candidate session number 0 0 Examination code Friday 11 May 2012 (morning) 2 1 hour 15 minutes 2 1 2 – 6 5 1 5 INSTRUCTIONS TO CANDIDATES • • • • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Answer all of the questions from two of the Options. Write your answers in the boxes provided. A calculator is required for this paper. A clean copy of the
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On the surface‚ the image of Hans appreciating the picture of his beloved as she rides away doesn’t sound out of the ordinary. However‚ when taking a look at the image this “portrait” provides‚ it’s a little less than conventional. An X-ray is essentially a picture of a person’s skeleton‚ and skeletal figures are a big aspect of the Mexican Day of the Dead holiday. During this day‚ family and friends get together to pray for and remember their passed loved ones‚ and provide food and drinks to help
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photoelectric effect? The photoelectric effect is when a clean metal surface emits electrons after light‚ especially ultraviolet‚ has been shone on at it. This happens because of a process called photoelectric emission whereby a single photon package of electromagnetic energy‚ called a quantum‚ is absorbed by metal surfaces. This energy is then transferred to one single electron which can then be released by the metal and that released electron is known as a photoelectron. The effect was first absorbed by German
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the speed of gamma rays‚ when both speeds are measured in a vacuum? 19. Which color of visible light has the shortest wavelength? 20. How are the frequency and wavelength of light related? (what equation(s))? 21. What is the wavelength of an electromagnetic wave that travels at 3× 108 m/s and has a frequency of 80 MHz? (1 MHz= 1‚000‚000 Hz)? 22. Emission of light from an atom occurs when an electron does what? 23. As changes in energy levels of electrons increase‚ the frequencies of atomic line
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1. This question is about lasers. (a) With reference to the light waves emitted by a laser‚ state what is meant by the terms (i) monochromatic. ........................................................................................................................... ........................................................................................................................... (1) (ii) coherent. ...............................................................................
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hertzian dipole. 3. Define antenna gain. 4. What are the two types of radiation pattern? 5. State reciprocity principle. 6. Define antenna temperature. PART – B 1. Derive the expression for calculation of electromagnetic field due to an alternating current element. 2. Explain how the solutions to wave equations are arrived? 3. (i)Derive the relationship between directivity & effective aperture. (ii)State and prove reciprocity principle with
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