ABSTRACT Title of Thesis: FREE-SPACE OPTICAL COMMUNICAITONS THROUGH A FOREST CANOPY Clinton Lee Edwards‚ Master of Science‚ 2004 Thesis Directed By: Professor Christopher C. Davis‚ Department of Electrical and Computer Engineering This paper models the effects of the leaves of mature broadleaf trees on air-to-ground free-space optical (FSO) communication systems operating through the leaf canopy. Ecological radiation transfer models are considered and the concept of Leaf Area Index
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with note tubes tied together and hung horizontally from the rack. Played with small mallets‚ they have a bright‚ natural‚ distinct tone‚ sounding in a two octave pentatonic range in relative D major. Danmo An amazing traditional percussion Instrument from Vietnam that has been used for centuries in Vietnamese Pagoda ceremonies. Hand carved from the highly resonant Jack Fruit tree‚ its unique sound and precise tuning make it a favorite of percussionists worldwide. The Danmo consists of a wooden
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Idiophone An idiophone is any musical instrument that creates sound primarily by the instrument as a whole vibrating—without the use of strings ormembranes. It is the first of the four main divisions in the original Hornbostel-Sachs scheme of musical instrument classification. The early classification of Victor-Charles Mahillon called this group of instruments autophones. Most percussion instruments that are not drums are idiophones. Hornbostel-Sachs divides idiophones into four main sub-categories
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Executive Summary Optical fibres are being increasingly used in the telecommunications industry. They are slowly replacing the conventional copper cables due their superior ‘data transmission’ properties. They transmit data via light pulses within glass or plastic strands. Fibre optics fit the material requirements for good data transmission since they are ability to transmit and preserve quality of signals‚ durable and cost-effective. Some of the current materials employed within the industry
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Optical illusions are all around us(explain). The brain remembers what it has seen before‚ then when it sees something similar it takes shortcuts when looking at a new images. This causes the brain to make mistakes and creates optical illusions. An optical illusion is a misleading image that deceives the eye. Different people see optical illusions differently because of their previous experiences. Previous experiences help the brain interpret what it sees. If your previous experiences determine
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Optical Storage Devices • An optical disk is a high-capacity storage medium. An optical drive uses reflected light to read data. • To store data‚ the disk’s metal surface is covered with tiny dents (pits) and flat spots (lands)‚ which cause light to be reflected differently. • When an optical drive shines light into a pit‚ the light cannot be reflected back. This represents a bit value of 0 (off). A land reflects light back to its source‚ Representing a bit value of 1 (on)
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OPTICAL PACKET SWITCHING Kunal K Mehta(11BEC107) Electronics and communication branch Institute of Technology‚ Nirma University Ahmedabad 11bec107@nirmauni.ac.in Abstract: Optical packet switching promises to bring the flexibility and efficiency of Internet to transparent optical networking technology with bit rate extending beyond that is currently available with electronic router technologies. New optical signal processing have been demonstrated that enable routing at bit rates from
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ASSIGNMENT 4 WEEK 1 - STORAGE DEVICES Describe the main working features of ONE of the following storage devices. Hard disk drive Optical storage Flash memory Include any relevant diagrams that help explain your answer. Optical Storage The optical storage device that most of us are familiar with is the compact disc (CD). A CD can store huge amounts of digital information (783 MB) on a very small surface that is incredibly inexpensive to manufacture. The design that makes this possible is
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OCCUPATIONAL LENSES What is an Occupational Lens? An Occupational Lens (or Enhanced Reader) is a reading lens that has a Degression zone to incorporate the Intermediate prescription (and sometimes‚ depending on prescription‚ a good DV portion) Why dispense an Occupational Lens‚ instead of a Reading pair of glasses? With more and more people using Computers‚ Laptops and Smartphones‚ we demand more from the Intermediate zone than ever before. So by dispensing a pair of Reading glasses to a
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INTRODUCTION Free-space optical communication (FSO) is an optical communication technology that uses light propagating in free space to transmit data for telecommunications orcomputer networking. "Free space" means air‚ outer space‚ vacuum‚ or something similar. This contrasts with using solids such as optical fiber cable or an optical transmission line. The technology is useful where the physical connections are impractical due to high costs or other considerations. Free-space optical communication (FSO)
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