Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 437 for “"communication system"”.
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ECS: Educational Communication System
… for better organization of student records and communication between parents and children in the school environment, this thesis concentrated on the development of an electronic communication system, the Educational Communication System (ECS). The ECS system was developed as both an iPhone App …
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MULTI-WAY COMMUNICATION SYSTEM
… a platform enabling the visual, audio and video communication between clients. The aim of this project is to utilize the open source Java software to build a desktop application enabling communication between clients.</p> <p>When a user needs to transfer a secured file, it’s unsafe to send it …
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Ultra-Fast, Autonomous, Reconfigurable Communication System
… disasters in which the destruction of essential communication infrastructure has significantly affected the number of casualties. In 2005, Hurricane Katrina in the United States resulted in over 1,900 deaths, three million land-line phones disconnections, and more than 2000 cell sites going out …
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A tactile communication system for navigation
A vibrotactile display for use in navigation has been designed and evaluated. The arm and the torso, which offer relatively large and flat surface areas, were chosen as locations for the displays. The ability of subjects to identify patterns of vibrotactile stimulation on the arm and torso was …
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comMotion : a context-aware communication system
… to the information overload is to create systems which deliver timely information when the user is in the relevant context. This thesis describes comMotion, a context-aware communication system for a mobile or wearable computing platform. A behaviour-learning agent automatically learns the …
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An ad-hoc wireless communication system
… platform called FluidVoice, a wireless audio communication system. This system consists of nodes forming a broadcast mesh based on 802.11. Some of these nodes called Stargates have the capability to communicate to the external world. The problem is that these gateways can fail or lose capacity …
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The Presbyterian Communication System: An Examination of the Formal Mass Communication System of the United Presbyterian Church, Usa
Made available in DSpace on 2015-05-12T21:38:59Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6607755.PDF: 12725571 bytes, checksum: 19c3c293100bc8eaa96d6b73629aeedd (MD5) Previous issue date: 1966
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Designing a wireless underwater optical communication system
… modems have long been the default wireless communication method for underwater applications due to their long range, the need for high speed communication has prompted the exploration of non-acoustic methods that have previously been overlooked due to their distance limitations. One scenario …
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Sketchpad, a man-machine graphical communication system
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1963.
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Statistical risk estimation for communication system design
Spacecraft are complex systems that involve many subsystems and multiple relationships among them. The design of a spacecraft is an evolutionary process that starts from requirements and evolves over time. During this process, changes can affect mass and power at component, subsystem, and system …
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A hybrid frequency modulated CDMA communication system
The wireless communications industry has experienced tremendous growth worldwide in the past decade. Numerous cellular communication systems have been developed to meet this need. In North America, AMPS, IS-54, 1S-95 and GSM are the most popular cellular systems ruling the market. In developing …
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A wireless communication system for a tactile vest
… research focuses on the development of wireless communication circuitry for a tactile display called the Tactile Vest. The display consists of a 4x4 array of vibrating motors worn around the user's torso in direct contact with the skin. It allows an operator with a notebook computer to issue …
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A low-cost modular underwater acoustic communication system
… describes the design of a novel modular acoustic communication device for underwater wireless communication. The ocean plays a vital role in the global climate system and biosphere, providing a wealth of biodiversity and resources. Human exploitation, pollutants, and contaminants have already …
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Riffle : an efficient communication system with strong anonymity
Anonymous communication is an important part of democratic societies and freedom of speech. Whistleblowers, protest organizers, and, more broadly, anyone with controversial viewpoints have been using the limited form of anonymity the Internet provides to protect their privacy. Unfortunately, the …
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Investigating design features of a computer-mediated communication system
Computer-mediated communication (CMC) is increasingly used in higher education, but it is not without problems. The effectiveness of CMC depends on many factors, including the characteristics of CMC systems themselves. The research reported here therefore aimed to investigate how an educational CMC …
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Magneto inductive communication system for underwater wireless sensor networks
… the four possible means of underwater wireless communication, namely acoustic, electromagnetic (EM), magneto-inductive (MI) and optics communication, MI communication enjoys the advantages of being low cost and robust equally in air, water and soil. This dissertation presents design and …
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Implementation of a Software Defined Spread Spectrum Communication System
The goal of this thesis is to develop a framework to prototype a software defined direct sequence spread spectrum transceiver that can be used as a node in an ad hoc network. We introduce the concept of a software radio, the current state of art, and GNU Radio and its concepts. We discuss in detail …
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A security evaluation of the salsa anonymous communication system
"We evaluate a state of the art P2P anonymous communication system, Salsa. Salsa is based on a distributed hash table, and uses secure lookups to locate relays for anonymous communication. To analyze user anonymity in Salsa, we first build an analytic model for the lookup security in Salsa, and …
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Detector design and estimation for a digital communication system
… thesis investigates the behavior of two digital communication systems based on Moving-Average Matched Filters (MAMF). In general, matched filters are instrumental in detecting signals corrupted by noise as they are designed to maximize the probability of detection of the transmitted signals. The …
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