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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Important Personalities in Police Photography *Joseph Nicephore Niepce - was able to obtain camera images on papers sensitized with silver chloride solution in 1816.He invented a photographic process which he called "heliography" meaning "writing of the sun" *Louis Jacques Mande Daguerre - invented "Daguerreotype"‚ an early photograph produced on a silver or silver-covered copper plate.It formed an image directly on the silver surface of a metal plate.It was a positive process‚thus‚it yielded
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Name: SERAFIM RUMIRIS PUTRI PARDEDE Student ID: 7E4B3413 Group: 1C4 Assignment Title: HARDWARE - INPUT TECHNOLOGY (DIGITAL CAMERA) Contents TOC \o "1-3" \h \z \u INTRODUCTION PAGEREF _Toc398205786 \h 3HISTORY OF DIGITAL CAMERA PAGEREF _Toc398205787 \h 3COMPONENT PARTS OF A DIGITAL CAMERA PAGEREF _Toc398205788 \h 4TYPES OF DIGITAL CAMERA PAGEREF _Toc398205789 \h 5USES OF DIGITAL CAMERAS PAGEREF _Toc398205790 \h 6ADVANTAGES AND DISADVANTAGES OF DIGITAL CAMERA PAGEREF _Toc398205791 \h 8COMPARISONS
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DIGITAL TRANSMISSION Definition: Transmittal of digital signals between two or more points in a communications system. Advantages of Digital Transmission • Noise immunity • Ease of processing and combining • Ease of measuring and evaluating • Disadvantages of Digital Transmission • Requires more bandwidth • Necessitates encoding and decoding circuitry • Requires precise time synchronization • Incompatible with older analog transmission systems Pulse Modulation Pulse Modulation
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instrumental products. Nikon D7100 camera is a new product announced in February 2013. A press release was making known to the public on Nikon website and the product was launched on 21st March. Aperture apparent in the strategy The concept of aperture in media planning means advertising should expose the consumer to the product when interest and attention are high. It can obtain the optimal effect and use minimum effort for maximum effect. Nikon has published new announcement
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information enclosed‚ including the case number. Photography-crime scene photographs can show the layout of the scene‚ the position of evidence to be collected‚ and the relation of objects at the scene to one another. 4. What are aperture and f-number? How does the aperture relate to the f-number and how does this affect the amount of light to which the film is exposed? 5. What is depth of field? How does a camera the f-number related to a depth of field of the photos it produces? 6. What should
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1/Nastic Movement: "Nastic movements are non-directional responses to stimuli (e.g. temperature‚ humidity‚ light irradiance). The movement can be due to changes in turgor or changes in growth. Nastic movements differ from tropic movements in that the direction of tropic responses depends on the direction of the stimulus‚ whereas the direction of nastic movements is independent of the stimulus. The rate or frequency of these responses increases as intensity of the stimulus increases. An example of
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How the Predator UAV Works Military commanders use tactics and strategy in combat to inflict as much damage on the enemy while trying to risk as few personnel and resources as possible. This principle was at the heart of the development of the RQ-1 and MQ-1Predator Unmanned Aerial Vehicle. These high-tech aircraft‚ controlled by a crew miles away from the dangers of combat‚ are capable of reconnaissance‚ combat and support roles in the hairiest of battles. In a worst-case scenario‚ if a Predator
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Title: Observing Bacteria and Blood- Lab #1 Purpose: Being able to learn how to correctly use a microscope and the oil immersion lens to be able to see the prepared slides. Also to learn how to prepare my own yogurt and blood slides. Procedure: First‚ set up the microscope. Clean the ocular lenses and objectives with lens paper. Then pace the prepared e slide on the stage and make adjustments. Turn the rotating nosepiece until the 10x objective is above the ring of light coming through the slide
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Electronic & Electrical Engineering Obafemi Awolowo University Ile-Ife Page. | 1 1. ADCs and DACs • Basic DAC Architecture: -binary weighted; -R-2R ladder • Basic ADC: -flash; -dual-slope ; and -successive approximation • Sample and Hold Circuit • Aperture Error • ADC/DAC specifications: -INL; -DNL; -dynamic range. • Oversampling • Noise-shaping and sigma-delta converters 1.1 INTRODUCTION It is observed that most physical quantities in nature are analog signals. These quantities include: temperature
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