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.
Results
Showing 1 to 20 of 99 for “"Telephony"”.
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Computer Telephony Programming in Java
<p>For decades, telephony systems have relied on hardware and thus have only benefitted particular vendors or public utilities. This has resulted in high costs for telephony service. In recent years software has started to take the place of some hardware in the telephony industry. The software is …
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Estimating Movement from Mobile Telephony Data
… and operates using both 2G and 3G cellular telephony technologies. Results show that the steady state vector analysis of modified Markov chain mobility models can return population density estimates comparable to population estimates obtained through a census. Evaluated using a test dataset, …
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Researches in relation to cable telephony
Thesis: B.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1886
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Measuring and generating social influence using mobile telephony
In recent years, mobile telephony and manufactured social influence have received attention as tools for eliciting behavior change. This paper describes an experimental approach to studying the effect of these tools in combination. We demonstrate that mobile telephony can be used to generate social …
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Internet Telephony : optimizing protocols, packet recovery, and packet size
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Versit Tmap : bridging two call-models in computer telephony integration
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Adaptive Beamforming Using a Microphone Array for Hands-Free Telephony
… is an adaptive beamformer used for hands-free telephony in a noisy environment. The microphone signals are amplified, then sent to an A/D converter. The microprocessor board takes the data from the 4 channels and utilizes digital signal processing to determine the direction-of-arrival of the …
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Speakeasy : mobile telephony for community networking and civic engagement in an immigrant community
Immigrants face a variety of barriers limiting their access to social services. These include inability to speak English, unfamiliarity with available services, and distrust of government agencies. To overcome these obstacles, many immigrants rely on informal social networks for information, …
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A cost model of Internet service providers : implications for Internet telephony and yield management
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Directory services for Internet telephony : creating a spanning layer over the Internet and telephone networks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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An empirical investigation of telephony impact on business performance and regional development: evidence from small businesses in Nigeria.
… relationship between increased access and use of telephony, small business performance and regional development in a developing country context. This study presents detailed evidence drawn from a sample of 198 small businesses in Nigeria. The research conceptualises and empirically tests a …
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Assessing the African mobile telephony boom : the impact of the mobile phone and its relationship to the digital divide
… provides an overview of the boom in mobile telephony in Africa, experienced in terms of exceptional and increasing subscriber growth. It provides a description of the mobile telephony boom, as well as its social political and economic impacts. It investigates what effect mobile telephony has …
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Effective Project Management Office Processes and Technology Transfer: Implementation of an Avaya Voice Over Internet Protocol Telephony System in Mexico
… question, an assessment of Cisco and Avaya VoIP telephony systems was completed. The assessment revealed Avaya offered more enhanced features and applications. The Avaya Communications Manager (CM) 450 gateway IP telephony system was selected. PMO processes were utilized to implement the G450 in …
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An investigation of the utility of monaural sound source separation via nonnegative matrix factorization applied to acoustic echo and reverberation mitigation for hands-free telephony
… various problems related to audio for hands-free telephony. We first investigate MSSS via NMF as an alternative acoustic echo reduction approach to existing approaches such as Acoustic Echo Cancellation (AEC). To this end, we present the single-channel acoustic echo problem as an MSSS problem, in …
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Supplanting copper : pricing and quality of GSM telecom services in Africa
… of the cell phone, was largely through fixed telephony. However, fixed line services which were controlled by public monopolies were characterized by high levels of inefficiencies manifesting in both a long waiting period before connection could be made and an expensive call rate. Due to …
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Inventive infrastructures : an exploration of mobile phone 'repair' cultures in Kampala, Uganda
… and social relationships that underpin mobile telephony in Kampala. Mobile phone workshops provide a rich and productive terrain for thinking about both the sociality and materiality of human-technology relations. Multi-sited ethnographic fieldwork of markets and small, informal businesses will …
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Using decoys to block SPIT in the IMS
… has just surfaced is VoIP (Voice over Internet Telephony) spam. Currently, VoIP has seen an increasing numbers of users due to the cheap rates. With the introduction of the IMS (IP Multimedia Subsystem), the number of VoIP users are expected to increase dramatically. This calls for a cause of …
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Universal mobile telephone standard (UMTS) licensing : recent European experience and the South African case by Nicolas Theopold.
… with the introduction of digital wireless telephony (also called "GSM " or "second generation (2G)), competition could effectively be introduced into the industry, as the new networks rely on antennas instead of fixed cable networks. This made it possible, and in the presence of large …
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