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Dissertations / Theses on the topic 'Communication Engineering'
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Punzo, Giuliano. "Verifiable swarm engineering with limited communication." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=22725.
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The new paradigms of swarm engineering, distributed architectures and autonomous multi-agent systems, are foreseen to redefine the way many engineering problems are approached. The affirmation of these new concepts requires the complete understanding of complex dynamics by the designers. That is, any system whose concept departs from the monolithic architecture must deliver its tasks in a predictable way and be controlled in a safe manner, while keeping the maximum possible autonomy. This work aims to span the gap between a complete foreseeable behaviour and system autonomy using precise mathematical descriptions of the dynamics and control of multi-agent systems. Dynamical system theory, Lyapunov stability, linear algebra and graph theory are used to rigorously frame the problem and delineate the characteristics of such systems in relation to a number of applications and performance parameters. The work first considers multi-agent systems as multi-particle systems in a physics fashion to draw fundamental results about the robustness to fragmentation when the individuals do not benefit from all-to-all communications. The exploitation of limited communications together with artificial potential functions is shown to be an effective way to shape formations of agents in a range of applications for future engineering, and in particular this scheme is proved to be effective for space-based communications through the autonomous deployment of antenna arrays. In this context, application to robotics is explored through laboratory tests exploiting wheeled robots with possible applications to structural inspection or planetary exploration. A stable fractal formation is proved to emerge out of a number of agents whose interaction network presents a recursive layout whereby relative motion is driven by artificial potential functions. Finally, the fast manoeuvring problem is covered together with one of allocating resources in an efficient way to track an external signal for the benefit of the group as a whole. Through an algebraic approach, the tracking capabilities are distributed amongst the agents producing advantages at group level for the tracking of an external signal. This also translates into fast reaction to threats.
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Kola, Abhinav Ram. "Customer communication challenges in Agile Requirements Engineering." Thesis, Blekinge Tekniska Högskola, Institutionen för programvaruteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20645.
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Context and background: Requirements engineering(RE) is a first and a very important phase in any software development which helps in building a suitable and customer satisfactory product. In the past few years, the use of Agile software development has become popular in the industry. Customer communication plays an important role in any software development life cycle. Customers state the requirements needed to develop a product in the Requirements Engineering phase. A project is likely to fail due to problems in customer communication during the RE phase. Objective: This thesis aims to study the Customer communication challenges in Agile requirements engineering, prioritize these challenges, and also find out the mitigation strategies to overcome these challenges. Research Method: A systematic mapping study is conducted to find out the customer communication challenges. Based on the data collected from the systematic mapping study, a survey is conducted to find out the mitigation strategies to overcome the customer communication challenges faced in the RE phase and also prioritize these challenges. Results: Based on the data collected from the systematic mapping study, a total of 18 customer communication challenges are identified. In the second step, a survey is conducted based on the identified challenges. The prioritization of these challenges is done by calculating the risk analysis of the challenges from the survey data. And finally, mitigation strategies are mentioned to overcome all the identified 18 challenges.
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de, Souza Almeida Lilian Maria. "Understanding Industry’s Expectations of Engineering Communication Skills." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7493.
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The importance of communication in the engineering profession is widely acknowledged by various stakeholders, including industry, academia, professional engineers, and engineering students. Even though alternative strategies to help students improve their ability to communicate professionally have been approached by many engineering programs across the country, research indicates a continued dissatisfaction of employers when it comes to the performance of engineers as communicators in the workplace. This perspective suggests efforts to improve students’ communication skills in universities may be inconsistent with workplace needs, revealing an apparent gap between what is taught and what is expected from engineering professionals. This gap provides an opportunity for additional research to identify the specific communication competencies required for engineers to succeed in the workplace. Particularly, the requirements of industry concerning engineers’ communication skills need to be understood more deeply, so that new educational interventions may be carefully tailored according to employers’ expectations and that both communication and engineering faculty can revisit their strategies to teach students to become better communicators. In order to obtain a deeper understanding of industry’s expectations concerning engineering communication skills, a qualitative research study was implemented to provide a detailed description of the communication skills practicing engineers need while working in industry. The exclusive focus on industry was pursued through the development of case studies. Four industrial segments (High-Tech, Automotive, Aerospace, and Manufacturing) that employ a significant percentage of engineers in the U.S. were selected. Engineers in leadership positions from each of the selected industrial segments participated in in-depth interviews and discussed about the expected engineering communication skills in industry. The results revealed that: 1) oral communication is prevalent in the engineering profession; 2) engineers need to tailor their messages to multiple audiences and to select the most appropriate type of communication medium; 3) written communication is expected to be clear, concise, and precise; 4) global communication is an increasingly demanded requirement in industry.
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Bezuidenhout, Quintus. "Satellite communications strategy selection for optimal LEO satellite communication." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71930.
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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: A low earth orbit satellite system can be useful in numerous communication applications
where physical connections are not possible. Communication time available from any point on
earth to the satellite is less than one hour per day. This one hour is fragmented into smaller
time slots due to the satellite orbiting. This is not much time to transfer data and there is
even less time available to transfer data when there are other external factors affecting the
system. It is thus crucial to optimise the satellite communications link so that more data can
be transferred per orbit.
The goal of this thesis is to improve the performance of a low earth orbit satellite communication
channel by varying certain parameters of the system, such as the protocol used,
modulation scheme, packet size, transmission power etc. and then to observe how these
parameters influence the system. The protocols that were chosen to be implemented are
CSMA-CA, CSMA-CA with DSSS technology and Round-Robin Polling.
A simulator for each protocol was designed with the Opnet platform, so that specific parameters
could be changed and the results observed, in order to optimise the communications link
between the satellite and ground stations.
The results showed that there is no particular configuration of modulation scheme, packet
size, transmission power etc. presenting the best overall solution for LEO satellite communications.
It must be considered what the specific LEO satellite application would be used for and
the characteristics required by that specific application. A suitable configuration must subsequently
be chosen from the set of configurations available to satisfy most of the application
requirements.<br>AFRIKAANSE OPSOMMING: ’n Satelliet met ’n lae wentelbaan kan gebruik word in verskeie kommunikasie toepassings
waar fisiese verbindinge nie noodwendig moontlik is nie. Die kommunikasietyd van enige
punt van aarde af na die satelliet, is minder as een uur per dag. Hierdie tyd word nog verder
verklein omdat die satelliet besig is om, om die aarde te wentel. ’n Uur is glad nie baie tyd
om data oor te dra nie en in realiteit is daar nog minder tyd beskikbaar as daar eksterne
faktore op die sisteem inwerk. Dus is dit baie belangrik om die satelliet kommunikasiekanaal
te optimiseer sodat soveel moontlik data as moontlik oorgedra kan word per omwenteling.
Die doel van hierdie tesis is om die deurset van die kommunikasiekanaal van n lae wentelbaan
satelliet te optimiseer, deur verskeie parameters te verander soos, protokol wat gebruik word,
modulasie skema, pakkie grootte, transmissiekrag ens. en dan waar te neem hoe dit die
sisteem beïnvloed. Die protokolle wat geïmplementeer is, is CSMA-CA, CSMA-CA met DSSS
tegnologie en Round-Robin Polling.
’n Simulator vir elke protokol was ontwerp in die Opnet simulasie platform, sodat die spesifieke
parameters verander kon word om die resultate te bestudeer met die doel om die kommunikasiekanaal
tussen die satelliet en grond stasies optimaal te benut.
Die resultate het bewys dat daar geen spesifieke konfigurasie van modulasie skema, pakkie
grootte, transmissiekrag ens. is wat die algehele beste oplossing is nie. Die spesifieke applikasie
waarvoor die lae wentelbaan satelliet gaan gebruik word moet geanaliseer word sowel
as die spesifieke karakteristieke van daai applikasie. Daarvolgens moet n unieke konfigurasie
opgestel word wat meeste van die applikasie se behoeftes bevredig.
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Antunes, Helder Manuel. "Improving and mediating usability-to-software engineering communication." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ64075.pdf.
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Brown, Sarah Michelle. "Communication practices of women in undergraduate engineering classes." [Ames, Iowa : Iowa State University], 2006.
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Murphy, Philippa. "Analyses of communication failures in rail engineering works." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275298.
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Hussein, Karim Mohie El Din 1972. "Communication facilitators for a distributed collaborative engineering environment." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/37787.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.<br>Includes bibliographical references (leaves 90-93).<br>by Karim Mohie El Din Hussein.<br>M.S.
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Mantina, A. Y. "To the problem engineering students' intercultural EFL communication." Thesis, Sumy State University, 2015. http://essuir.sumdu.edu.ua/handle/123456789/40611.
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Cultural features of different nations make more urgent the problem of cultural identity and cultural differences. The cultural diversity of modern humanity is increased and nations try to preserve and develop their cultural identity.
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Cryan, R. A. "Communication systems." Thesis, University of Huddersfield, 1999. http://eprints.hud.ac.uk/id/eprint/7477/.
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Moody, Meredith Harper. "Overcoming language communication barriers in the emergency room using erca-emergency room communications aid." Honors in the Major Thesis, University of Central Florida, 1998. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/43.
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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering<br>Industrial Engineering
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Poltavtchenko, Elena. "Engineering design reports in upper-division undergraduate engineering courses and in the workplace." Thesis, Northern Arizona University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3562160.
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<p> The workplace success of new engineering graduates is ultimately affected by their oral and written communication skills. However, engineering students' academic preparation for industry's needs in terms of written communication has been widely acknowledged as inadequate. The present study is intended to improve our understanding of a prominent engineering genre, the engineering design report (EDR), and provide support for students learning to write this genre. The goals of this study are to (a) conduct a corpus-based register comparison between student and professional EDRs and (b) provide a more detailed description of professional EDRs, by determining their rhetorical organization and identifying linguistic features associated with this organization. </p><p> This research is based on two EDR corpora (N of texts=262, with approximately 1,119,186 words), one with upper-division engineering students' EDRs and the other with professional engineers' EDRs. The study examines both non-linguistic and linguistic features of student and professional EDRs. First, non-linguistic characteristics of EDRs are examined using the EDR situational framework developed for the study. Then, corpus-based methodologies are used to analyze core grammatical features and features associated with grammatical complexity in both corpora. Finally, to determine conventional discourse structures of professional EDRs, the study draws on the English for Specific Purposes tradition of genre analysis and then uses register analysis to investigate linguistic features associated with particular rhetorical structures. </p><p> The register analyses revealed complex patterns of linguistic variation, frequently influenced by the registers' situational characteristics. The results of these analyses indicate that two EDR registers fill different positions on the spoken-to-written continuum, with reports produced in the workplace being closer to professional written registers and student reports using more speech-like features. The genre analysis of professional EDRs uncovered the highly variable nature of this genre. Despite considerable variation in EDR rhetorical organization, 12 common moves were identified that cluster in specific ways to form EDR organizational units and rely on particular sets of linguistic features. A streamlined template of the EDR genre is introduced as are linguistic features associated with its organization. Study results may have pedagogical implications for teaching features of professional EDRs to students.</p>
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Graflund, Marcus. "COMMUNICATION USING ANUNDERWATER SONAR." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36722.
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Beyh, S. "Computer and communication engineering : internet protocol telephony in construction." Thesis, University of Salford, 2004. http://usir.salford.ac.uk/26582/.
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A construction project traditionally involves intensive communication flows between the site operations (workers, gangers, engineers, foremen, etc.), the site office, the company and the Supply Chain. Typically on the jobsite, a temporary site office is set up in order to conduct the operations of the construction project phases. The site office is equipped with traditional telecommunication means such as phone, fax and Internet connection. The site personnel are provided with a multitude of mobile, satellite and wireless telecommunication devices where appropriate, such as PDA, GSM and satellite phones/fax, and walkie-talkies. Technically, these legacy systems, once put together, could be able to provide adequate communication resources to the construction project teams. But one of the main issues emerging from the use of the abovementioned traditional telecommunication systems is that their cost can be found in some cases to be very high. On the other hand, in the absence of providing the necessary communication means available through the traditional telecommunication systems to the personnel on the move for whatsoever reason could be very harmful and, may negatively affect the execution of the construction works and the project lifecycle as a whole. This situation could be overcome if alternative solutions are put in place to reduce cost and improve communications. Therefore, this study has investigated a new communication paradigm known as IP (Internet Protocol) Telephony, which could possibly provide the site office, as well as the entire project team members with adequate, cheaper and more effective communications means at the jobsite. IP Telephony refers to communication services such as voice, video, facsimile, and/or voice-messaging applications that are transported via the Internet, rather than the Public Switch Telephone Network (PSTN). The basic steps involved in originating an IP Telephony call are the conversion of the analogue voice signal into digital format and the compression/translation of the signal into IP packets for transmission over the Internet. This communication paradigm eliminates the need for separate infrastructures for voice and data networks as these services can be implemented over a single data infrastructure. Furthermore, while, from the technical point of view IP Telephony Technology could be ready to satisfy the business case in general, its development within the construction sector has not been observed due to several barriers that have been investigated in this work as being part of the development of an integrated framework that aimed at enabling the use of Internet Protocol Telephony in construction. This research aimed at developing a generic integrated framework for enabling the use of Internet Protocol (IP) Telephony in construction. The process involved in the development of this framework included the conduct of intensive literature around the traditional telecommunication systems used by construction firms in the United Kingdom as well as the investigation of the current situation of IP Telephony technology in terms of availability of commercial services and applications used by the construction industry. The field investigations were obtained through appropriate surveys and interviews conducted with construction firms, telecommunication operators and Internet Protocol (IP) Telephony equipment vendors respectively. The research further looked at the issues related to the transfer of such a technology into the construction industry and investigated the main barriers preventing its implementation in construction sites' environments. These investigations represented an important part in the development of the "Internet Protocol Telephony on Construction Sites (IPTCS) Framework" which represents the focus of this research. The various modes of communications are described under this common framework which is expected to benefit in premier-lieu the construction industry by driving construction firms to look at IP Telephony technology as an adequate and cost effective alternative to their communication means for empowering their mobile personnel on construction sites and in the office alike. It could also motivate telecommunication operators, IP Telephony application developers and equipment vendors to establish specific solutions suitable for construction sites environments according to the industry's needs and requirements.
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Carvalho, Junior Paulo Roberto de. "GPU Communication Performance Engineering for the Lattice Boltzmann Method." reponame:Repositório Institucional da UFPR, 2016. http://hdl.handle.net/1884/45773.
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Orientador : Prof. Dr. Daniel Weingaertner<br>Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Exatas, Programa de Pós-Graduação em Informática. Defesa: Curitiba, 10/08/2016<br>Inclui referências : f. 59-62<br>Área de concentração: Ciência da computação<br>Resumo: A crescente importância do uso de GPUs para computação de propósito geral em supercomputadores faz com que o bom suporte a GPUs seja uma característica valiosa de frameworks de software para computação de alto desempenho como o waLBerla. waLBerla é um framework de software altamente paralelo que suporta uma ampla gama de fenômenos físicos. Embora apresente um bom desempenho em CPUs, testes demonstraram que as suas soluções de comunicação para GPU têm um desempenho ruim. Neste trabalho são apresentadas soluções para melhorar o desempenho, a eficiência do uso de memória e a usabilidade do waLBerla em supercomputadores baseados em GPU. A infraestrutura de comunicação proposta para GPUs NVIDIA com suporte a CUDA mostrou-se 25 vezes mais rápida do que o mecanismo de comunicação para GPU disponíveis anteriormente no waLBerla. Nossa solução para melhorar a eficiência do uso de memória da GPU permite usar 55% da memória necessária por uma abordagem simplista, o que possibilita executar simulações com domínios maiores ou usar menos GPUs para um determinado tamanho de domínio. Adicionalmente, levando-se em consideração que o desempenho de kernels CUDA se mostrou altamente sensível ao modo como a memória da GPU é acessada e a detalhes de implementação, foi proposto um mecanismo de indexação flexível de domínio que permite configurar as dimensões dos blocos de threads. Além disso, uma aplicação do Lattice Boltzmann Method (LBM) foi desenvolvida com kernels CUDA altamente otimizados a fim de se realizar todos os experimentos e testar todas as soluções propostas para o waLBerla. Palavras-chave: HPC, GPU, CUDA, Comunicação, Memória, Lattice Boltzmann Method, waLBerla.<br>Abstract: The increasing importance of GPUs for general-purpose computation on supercomputers makes a good GPU support by High-Performance Computing (HPC) software frameworks such as waLBerla a valuable feature. waLBerla is a massively parallel software framework that supports a wide range of physical phenomena. Although it presents good performance on CPUs, tests have shown that its available GPU communication solutions perform poorly. In this work, we present solutions for improving waLBerla's performance, memory usage e_ciency and usability on GPUbased supercomputers. The proposed communication infrastructure for CUDA-enabled NVIDIA GPUs executed 25 times faster than the GPU communication mechanism previously available on waLBerla. Our solution for improving GPU memory usage e_ciency allowed for using 55% of the memory required by a naive approach, which makes possible for running simulations with larger domains or using fewer GPUs for a given domain size. In addition, as CUDA kernel performance showed to be very sensitive to the way data is accessed in GPU memory and kernel implementation details, we proposed a flexible domain indexing mechanism that allows for configuring thread block sizes. Finally, a Lattice Boltzmann Method (LBM) application was developed with highly optimized CUDA kernels in order to carry out all experiments and test all proposed solutions for waLBerla. Keywords: HPC, GPU, CUDA, Communication, Memory, Lattice Boltzmann Method, waLBerla.
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Gopsill, James Anthony. "A social media approach to support engineering design communication." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619150.
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Engineers Talk Be it through conversations, meetings, informal discussion, phone calls or E-Mail, Engineering Design Communication is the main tributary for the sharing of knowledge, thoughts and ideas, and therefore, fundamental to Engineering Work. An engineer spends a significant portion of their day communicating as they 'fill in the gaps' left by formal documentation and processes. It is thereby, an inherent source of explicit design rationale that relates to (and very often supplements) Engineering Records and their generation. Engineering Design Communication is not only central for Engineering Work and Records but also offers potential - through aggregation - to reveal underlying features, patterns and signatures that could aid current and future Engineering Project Management. As Engineering Design Communication plays such a pivotal role, it comes as no surprise that there is much extant research. The majority of this is descriptive and has focused on identifying patterns in engineers' communication behaviour as well as analysing the utility of currently employed communication tools/mediums (such as, E-Mail and meetings). However, little prescriptive research - through either a tool or process - has been undertaken. This may be due to the considerable challenges facing research in this field such as the need to maintain a high-level of Engineering Context, ensure the right engineers are able to participate and associate the communication with its respective Engineering Records. All of which, has to be achieved within an Engineering Context where teams are becoming larger, more mobile, multi-disciplinary & distributed, and often performing variant or incremental design. Although, it is argued that Social Media has the potential to militate these challenges through the use of technologies that provide agile development, support for ubiquitous computing and sharing of multimedia. Therefore, this thesis investigates how Social Media can be used to support Engineering Design Communication. This is achieved through the elicitation and synthesis of the requirements for supporting Engineering Design Communication, and consideration of the effective application of the Social Media. This forms the basis from which a Social Media approach to support Engineering Design Communication is created and then instantiated within a tool called PartBook. PartBook has been developed iteratively and involved an industrial study to evaluate and improve functionality. It has since been used within an eleven week Formula Student project involving thirty-four students from multiple engineering disciplines in a distributed working environment. The analysis of which addresses the validation of the requirements that has led to amendments and generation of new requirements as well as evaluation of the Social Media approach that has led to insights into the potential impact such a tool could bring to Engineering Work, Records and Project Management.
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Jung, Matthias. "Software engineering techniques for support of communication protocol implementation." Nice, 2000. http://www.theses.fr/2000NICE5444.
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Développer des applications distribuées implique souvent l'implémentation de nouveaux protocoles qui concernent les sémantiques de l'application ainsi que de la couche transport. Cependant, l'implémentation de nouveaux protocoles à partir de zéro est une tâche lourde et coûteuse. L'objectif de notre thèse est le développement des techniques et des outils qui nous aident à minimiser les coûts d'implémentation et de maintenance des protocoles de communication dans les systèmes finaux. Nous nous concentrons sur des techniques modernes du génie logiciel - charpentes orienté objet , motifs de conception et développement par assemblage de composants - qui ont montré récemment leur applicabilité dans différents domaines. La fondation de notre travail est un ensemble d'abstractions et de principes de structuration qui promeuvent la réutilisation et la flexibilité des logiciels de protocole. L'idée principale derrière ces principes suit une structure verticale au lieu d'une structure en couches. Notre approche intègre tous les services dont l'application a besoin dans une seule entité alors que tout démultiplexage est concentré hors de cette entité dans une couche plus basse. Par ailleurs, nous proposons de structurer les protocoles par chemin de données et de diviser chaque chemin de données identifié en modules à grain fin, réutilisables et configurables. Basée sur notre approche de structuration, nous présentons une charpente en Java dénommée PITOU qui permet de construire de nouveaux protocoles en assemblant et configurant des composants existants. De plus, nous avons mis en œuvre quelques outils de support, tels que des outils de simulation et de visualisation, ainsi qu'un générateur de code. L'applicabilité et la flexibilité de notre approche sont démontrées par l'implémentation des services de transport de TCP et par une application qui analyse des données d'une séance de RTP/RTCP.
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Zaugg, Holt. "Communication Patterns Among Members of Engineering Global Virtual Teams." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3314.
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Global virtual (GV) teams provide an opportunity for engineering students to participate in meaningful, cross-cultural learning projects without additional costs of time and money associated with study abroad programs. However, students must learn how to communicate effectively with international team members. Instruction to help students learn which virtual communication technologies to use and how to use them is needed. Training must include cross-cultural training that facilitates team communications and interactions with people from different cultural backgrounds. This study focused on how 10 specialized lessons, Principles of Global Virtual Teams (PGVT), facilitated the communications and interactions of students participating on GV teams in an advanced engineering design course. All GV teams provided evidence that communications and interactions on GV teams are different than Co-located teams. However, teams receiving the PGVT instruction showed indications of increased communication ability on GV teams. These indicators included technology use, vernacular phrase use, communication competence ratings and descriptors from team emails.
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Wan, Jun S. M. Massachusetts Institute of Technology. "All-to-all communication with low communication cost." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120398.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 61-64).<br>In an all-to-all broadcast, every user wishes to broadcast its message to all the other users. This is a process that frequently appears in large-scale distributed systems such as voting and consensus protocols. In the classic solution, a user needs to receive n messages and n signatures where n is the number of users in the network. This is undesirable for large-scale distributed systems that contain millions or billions of users and can be the throughput bottleneck for some existing systems. In this thesis, we propose two protocols for the all-to-all broadcast problem. Our protocols upper bound the number of bits each user receives by [Theta](n log log2 n), which is a huge improvement from the conventional n times the signature size. Besides the all-to-all protocol, we also provide new results regarding random graphs and regular graphs. These results are used in our protocol to prove its efficiency. But they are interesting by themselves and have independent theoretic value.<br>by Jun Wan.<br>S.M.
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Kesavan, Ram. "Communication mechanisms and algorithms for supporting scalable collective communication on parallel systems /." The Ohio State University, 1998. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487953204282155.
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Du, Hao. "Optical wireless MIMO communication." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/70945/.
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This thesis provides an in-depth investigation and evaluation of infrared optical wireless MIMO communication systems to be applied in both indoor and outdoor environment. The principle objective of the research is to demonstrate both the advantages and disadvantages of the optical wireless MIMO systems using different modulation types. The first part provided analyses of important OW configurations using APD receivers using WMC model and SISO, MISO, SIMO and MIMO configuration. Thus, an analytical expression for 2-1 MISO, 1-2 SIMO and MIMO was successfully developed. This part also illustrates the coding gains possible using diversity schemes for APD OW systems. In the presence of strong fading, the SISO approach is rendered virtually useless, whereas diversity offers acceptable BER values. The results underpin the approach of this thesis, where indoor PIN diode based experimental measurements confirm the gains offered by diversity. In the second part of the work, several optical wireless MIMO systems applicable for the indoor environment are developed for three different modulation types, OOK modulation, PPM modulation and SIR-RZI modulation. These modulations are used in optical MIMO systems are studied for which, mathematical models that evaluate the BER performance of the MIMO system for different axis displacement and for different distances between transmitters and receivers. Based on the results, the PPM system has been shown to present the best BER performance, including high interference-resistance capability. A group of new mathematical models have been evaluated, which demonstrates a high level of correlation with the results derived from empirical models at 93%. Thus, the mathematical models developed and used for the specified evaluation appear to correspond reasonably well, and can be applied in future research on these aspects.
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Bylund, Patrick. "JMS communication : Communicating with a legacy JMS broker using JavaScript." Thesis, Mittuniversitetet, Avdelningen för informationssystem och -teknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-31078.
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The objective of this thesis is to research how to use JavaScript to communicate with a legacy JMS broker, specifically OpenMQ 4.1 and implementing a proof- of-concept of this. This proof-of-concept should be able to send and receive JMS messages. The necessary preparations for designing this application was to research possible ways of communicating with different JMS brokers using oth- er languages than Java. This research showed that the only viable method in or- der to communicate with this version of OpenMQ is to create a Java bridge be- tween JavaScript and the JMS broker. The results shows that it's possible to use JavaScript to communicate with OpenMQ 4.1 by using a Java Bridge together with NodeJS. This result is performed by making an integration test, by first sending a message with a certain ID to the API and then receiving a response at the intended response destination with the same ID. The front-end of the proof- of-concept provides a web application UI for performing this integration test. Future improvements of this implementation can be done by extending the Java Bridge and API in such a way that it can be used against many different JMS brokers. The configuration data used can also be stored in more reliable ways, if multiple users are using the API and web application at the same time, for example by using a database instead of JSON files.
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Luojus, P. (Petri). "UbiBroker:event-based communication middleware." Master's thesis, University of Oulu, 2013. http://urn.fi/URN:NBN:fi:oulu-201312062026.
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This thesis presents the UbiBroker, an event-based communication middleware for ubiquitous computing environments. The experimental computing environment used in the thesis is provided by the UBI-hotspots, a network of pervasive displays deployed around Oulu. The functional requirements for the UbiBroker are elicited from the long-term experience in developing and maintaining the middleware software layer for the UBI-hotspots, including support for distributed ad hoc applications triggered by user input and context events, interoperability with a wide range of computing platforms, stability, and simplicity to reduce the burden of application developers.
The UbiBroker enables ad hoc composition of distributed applications by referential decoupling of communicating processes with a communication model based on events and topic-based publish/subscribe messaging paradigm. The UbiBroker is implemented using the open source RabbitMQ message broker that provides interoperability with a wide range of operating systems and programming languages. The UbiBroker is subjected to comprehensive evaluation, including heuristic assessment with the distributed systems taxonomy of Tanenbaum and Steen, experimental performance evaluations in a lab network and in the UBIhotspot network, long-term production deployment in the UBI-hotspot network, and the development of several prototype applications such as the distributed Ubidoku game deployed on the UBI-hotspots.
The evaluations show that the UbiBroker enables easy development of distributed applications for the UBI-hotspots. Stability is demonstrated by the fact that a single broker instance has been serving the UBI-hotspot network for five months and so far there has not been a single incident of the broker crashing or becoming unstable. The performance evaluations reveal hard upper limits for the message delivery capacity of the proposed broker architecture and provide insight into optimizing the configuration of the broker for different operating environments.
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Jakobsson, Carin, and Olof Sjödin. "SDR Implementation for Satellite Communication." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210857.
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SDR (Software Defined Radio) is a radio communicationsystem that has been of great interest and developmentover the last 20 years. It decreases communication costs significantlyas it replaces expensive analogue system components withcheap and flexible digital ones. In this article we describe anSDR implementation for communication with the SEAM (SmallExplorer for Advances Missions) satellite, a CubeSat satellitethat will perform high quality magnetic measurements in theEarth orbit. The project result consists of carefully chosen SDRtransceiver and software tools, integrated with parts of thecurrent satellite communication system. The implementation hasrequired studies within the field of digital processing, SDR andspecifications of the SEAM satellite communication system, andhas been developed and tested using a radio identical to an onboard satellite radio and coaxial cables as transmission media.The system is able to interpret incoming messages from theradio as hexadecimal data and will serve as a prototype whenimplementing SDR for another, more complex and expensivesystem that is used for communication with the SEAM satellite.
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Rosén, Anders. "Embedded Communication Channel for Node Communication in WDM Networks." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209167.
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Optical Transport Network is a set of Optical Network Elements (NE) connected by optical fiber links able to provide support for optical networking using Wavelength-Division Multiplexing (WDM). In order to be able to introduce link-level applications that require NE-to-NE communication in a packet-optical network, an embedded communication channel is needed. Examples of such applications are dual-ended protection, remote configurationand path trace. By implementing a NE-to-NE communication channel, the exchange of commands and information will allow for implementation of applications that will increase the data link stability in the network. The purpose of this work has been to prove the feasibility of such a channel. This thesis discusses the possibilities of implementing such a channel adjusted to Transmode's layer 1 products without causing disturbance inthe regular traffic or affecting any existing embedded communication. It also proves the channels function in a proof-of-concept manner by demonstrating a simple Path trace application run upon an implementation of the channel on hardware. The chosen solution is an Embedded Communication Channel driver intended to provide termination points for an Embedded Communication Channel (ECC), supervising the connectivity of the channel and relay messages to applications. This thesis project has been carried out at Infinera Corporation (earlier Transmode Systems AB) during summer/autumn 2015.
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Rossouw, Jeanne Jacques. "Effective communication planning for high-performance civil engineering project teams." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/19993.
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In the area of project management, it is well understood that effective communication processes impact positively on project performance. Despite this, project teams still struggle to develop effective communication plans that address their project communication needs. The evidence of this is that many project problems are attributed to poor communication. The literature addresses the needs and shortcomings of group communication and communication planning in general; but there is however, a scarcity of literature describing how to plan for the internal communication needs of high-performance civil engineering teams. With the limited literature available on the topic, this study seeks to validate how effective the current communication planning methods are at Aurecon in meeting the communication needs of its project teams. This qualitative research project is a case study of communication planning within the project teams at Aurecon in Port Elizabeth. A semi-structured interview process was followed, addressing specific questions, without limiting the direction of the interviews. Project team members, working on high performance projects, were asked for their thoughts, feelings and suggestions about existing communication practices and project communication planning. Overall, it was found that the existing communication-planning practices at Aurecon did not have any beneficial effect on how team members communicate. It was concluded that project teams would benefit from improved communication-planning processes that are more inclusive of their specific communication needs. Organisations working on high-performance projects will benefit directly from the research, which challenges these organisations to think more broadly about how they plan for communication at a project level. The research provides practical suggestions for improving the way that teams plan their communication processes; and it does so by focusing on the communication needs of the team members. Recommendations are made to professional bodies, tertiary institutions, project organisations – and most importantly – to project team members themselves. The recommendations to project team members include taking ownership of communication practices, asserting their views, as well as making their needs known.
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Berg, Linda. "Communication tools’ impact on project communication efficiency : An evaluation of traditional communication tools and Social Media." Thesis, Blekinge Tekniska Högskola, Institutionen för industriell ekonomi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-14725.
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Shoemaker, David R. (David Robert). "An optimized hardware architecture and communication protocol for scheduled communication." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42660.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.<br>Includes bibliographical references (p. 173-177).<br>by David Shoemaker.<br>Ph.D.
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Yarkoni, Orr. "Engineering an inducible NO pathway to facilitate cell-electronics communication." Thesis, University of Newcastle Upon Tyne, 2012. http://hdl.handle.net/10443/1739.
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Turning cells into useful devices to perform unnatural functions creates the potential to permit the interface between biological organisms and electronics. In this thesis cell-based devices were designed and constructed to respond to either light or a specific chemical stimulus. Design constraints were defined by the eventual application of the device, a biohybrid robot. The enzyme endothelial nitric oxide synthase (eNOS) was chosen as a target for genetic engineering. Prior to constructing the device a suitable host for the engineered construct was selected. CHO-K1 cells were transfected with nitric oxide synthase and expression levels were characterized via flow cytometry and inhibitor studies. A novel method for the effective delivery of inhibitors was developed and applied to demonstrate that transfected eNOS was sufficiently expressed to produce a measurable output. In addition, a balance between the native nitric oxide production machinery of the cells and the transfected endothelial nitric oxide synthase was observed. Two systems were designed and constructed for stimuli responsive nitric oxide production. The first system was designed to produce nitric oxide in response to the presence of the antibiotic rapamycin. Chemical induced dimerization would bring the two separated domains of endothelial nitric oxide synthase into close enough proximity to re-establish protein function. The separate oxygenase and reductase domains were successfully amplified and subsequently fused with components of the chemically induced dimerization system. The second system involved fusing a domain from the plant gene Nhp1 (Light Oxygen Voltage domain - LOV) capable of harvesting a photon, with mouse endothelial nitric oxide synthase. This strategy aimed to hijack the wild type protein’s native electron transfer pathway. Manipulation was carried out in bacteria with subsequent transfection into CHO-K1 cells. Subsequent testing of nitric oxide production the mutant cells confirmed the optical sensitivity of the mutant eNOS. Moreover both LOV mutant cell lines were capable of fast response times and switching behaviour. The findings of this thesis demonstrate that genetic engineering of endothelial nitric oxide synthase is a suitable strategy for the controlled release of nitric oxide upon optical stimulation. Moreover the potential of an engineered cell to respond quickly to stimuli has been realized, comparing favourably to genetically engineered systems that rely on gene expression to elicit an output.
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Maier, Anja Martina. "A grid-based assessment method of communication in engineering design." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613333.
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Bossert, Georges. "Exploiting Semantic for the Automatic Reverse Engineering of Communication Protocols." Thesis, Supélec, 2014. http://www.theses.fr/2014SUPL0027/document.
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Cette thèse propose une approche pratique pour la rétro-conception automatisée de protocoles de communication non-documentés. Les travaux existants dans ce domaine ne permettent qu'un apprentissage incomplet des spécifications ou exigent trop de stimulation de l'implémentation du protocol cible avec le risque d'être vaincu par des techniques de contre-inférence. Cette thèse adresse ces problématiques en s'appuyant sur la sémantique du protocole cible pour améliorer la qualité, la rapidité et la furtivité du processus d'inférence. Nous appliquons cette approche à la rétro-conception des deux principaux aspects de la définition d'un protocole à savoir l'inférence de sa syntaxe et de sa grammaire. Nous proposons un outil open-source, appelé Netzob, qui implémente nos contributions pour aider les experts en sécurité dans leur lutte contre les dernières menaces informatiques. Selons nos recherches, Netzob apparait comme l'outil publié le plus avancé pour la rétro-conception et la simulation de protocoles de communications non-documentés<br>This thesis exposes a practical approach for the automatic reverse engineering of undocumented communication protocols. Current work in the field of automated protocol reverse engineering either infer incomplete protocol specifications or require too many stimulation of the targeted implementation with the risk of being defeated by counter-inference techniques. We propose to tackle these issues by leveraging the semantic of the protocol to improve the quality, the speed and the stealthiness of the inference process. This work covers the two main aspects of the protocol reverse engineering, the inference of its syntactical definition and of its grammatical definition. We propose an open-source tool, called Netzob, that implements our work to help security experts in their work against latest cyber-threats. We claim Netzob is the most advanced published tool that tackles issues related to the reverse engineering and the simulation of undocumented protocols
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Juba, Brendan (Brendan Andrew). "Universal semantic communication." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62423.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 325-334).<br>Is meaningful communication possible between two intelligent parties who share no common language or background? We propose that this problem can be rigorously addressed by explicitly focusing on the goals of the communication. We propose a theoretical framework in which we can address when and to what extent such semantic communication is possible. Our starting point is a mathematical definition of a generic goal for communication, that is pursued by agents of bounded computational complexity. We then model a "lack of common language or background" by considering a class of potential partners for communication; in general, this formalism is rich enough to handle varying degrees of common language and backgrounds, but the complete lack of knowledge is modeled by simply considering the class of all partners with which some agent of similar power could achieve our goal. In this formalism, we will find that for many goals (but not all), communication without any common language or background is possible. We call the strategies for achieving goals without relying on such background universal protocols. The main intermediate notions introduced by our theory are formal notions of feedback that we call sensing. We show that sensing captures the essence of whether or not reliable universal protocols can be constructed in many natural settings of interest: we find that across settings, sensing is almost always sufficient, usually necessary, and generally a useful design principle for the construction of universal protocols. We support this last point by developing a number of examples of protocols for specific goals. Notably, we show that universal delegation of computation from a space-efficient client to a general-purpose server is possible, and we show how a variant of TCP can allow end-users on a packet network to automatically adapt to small changes in the packet format (e.g., changes in IP). The latter example above alludes to our main motivation for considering such problems, which is to develop techniques for modeling and constructing computer systems that do not require that their components strictly adhere to protocols: said differently, we hope to be able to design components that function properly with a sufficiently wide range of other components to permit a rich space of "backwards-compatible" designs for those components. We expect that in the long run, this paradigm will lead to simpler systems because "backwards compatibility" is no longer such a severe constraint, and we expect it to lead to more robust systems, partially because the components should be simpler, and partially because such components are inherently robust to deviations from any fixed protocol. Unfortunately, we find that the techniques for communication under the complete absence of any common background suffer from overhead that is too severe for such practical purposes, so we consider two natural approaches for introducing some assumed common background between components while retaining some nontrivial amount of flexibility. The first approach supposes that the designer of a component has some "belief" about what protocols would be "natural" to use to interact with other components; we show that, given sensing and some sufficient "agreement" between the beliefs of the designers of two components, the components can be made universal with some relatively modest overhead. The second approach supposes that the protocols are taken from some restricted class of functions, and we will see that for certain classes of functions and simple goals, efficient universal protocols can again be constructed from sensing. Actually, we show more: the special case of our model described in the second approach above corresponds precisely to the well-known model of mistake-bounded on-line learning first studied by Barzdirs and Frievalds, and later considered in more depth by Littlestone. This connection provides a reasonably complete picture of the conditions under which we can apply the second approach. Furthermore, it also seems that the first approach is closely related to the problem of designing good user interfaces in Human-Computer Interaction. We conclude by briefly sketching the connection, and suggest that further development of this connection may be a potentially fruitful direction for future work.<br>by Brendan Juba.<br>Ph.D.
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Pathak, Shrey. "Piezoelectric microsensors for semiochemical communication." Thesis, University of Warwick, 2012. http://wrap.warwick.ac.uk/57210/.
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Chemical communication plays vital role in the mediating the behaviour of an organism living in the “odour space”. The mechanisms by which odours are generated and detected by the organism has evolved over thousands of years and thus the potential advantages of translating this system into a fully functional communication system has opened new avenues in the area of multi-disciplinary research. This formed the basis of the Biosynthetic Infochemical Communications project – iCHEM whose central aim was to develop a new class of communication technology based on the biosynthesis pathways of the moth, S. littoralis. This novel infochemical communication system would consist of a “chemoemitter” unit which would generate a precise mix of infochemicals which after travelling through the odour space would be detected by a complementary tuned detector – the “chemoreceiver” unit comprising of a ligand specific detection element and an associated biophysical model functioning similar to the antennal lobe neuron of the moth. This combined novel system will have the capability of communicating by the help of chemicals only, in the vapour or liquid phase. For the work presented in this thesis, the novel concept of infochemical communication has been examined in the vapour and liquid phase by employing piezoelectric microsensors. This has been achieved and demonstrated throughout the thesis by employing chemo-specific acoustic wave microsensors. For vapour phase assessment, quartz crystal microbalance, were coated with different organic polymer coatings and incorporated in a prototype infochemical communication system detecting encoded volatiles. For liquid phase assessment, shear horizontal surface acoustic wave (SH-SAW) microsensors were specifically designed and immobilised within Sf9 insect cells. This GPCR based whole cell biosensing system was then employed to detect ligand specific activations thus acting as a precursor to the development of a fully functionalised OR based signalling system, thus contributing to the growing field of communication and labelling technology.
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Granberg, Niklas, and Anna Pestrea. "Evaluating mobile communication energy consumption with video and voice communication." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150391.
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Today smart phones can be used in different ways for different scenarios. One is video and voice calls over internet, which consumes a lot of energy and could be improved. This thesis studies how different wireless communication technologies affect the battery consumption of a mobile device. This is measured with the help of a software program named EnergyBox. By capturing different traces on a smartphone and giving it as input to Energybox, we can see how different communication methods affect the energy consumption. These results showed that voice calls consumed less energy than video calls and that WiFi was the most energy efficient transmission technology, followed by 3G and LTE. It could also be seen that if the call interval was shortened for the video calls the energy consumption decreased. 3G also showed some interesting results that should be investigated further. The conclusion of this is that voice calls are preferred over video calls considering the energy aspect and that WiFi consumes less energy than 3G, which consumes less than LTE.
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Gavin, Helen Fiona. "Selection interviewing : a study in applied knowledge engineering." Thesis, Teesside University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358791.
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Rudraraju, VRS Raju. "Ultrasonic Data Communication through Petroleum." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1271703312.
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Blomdahl, Gilbert A. "Engineering collaboration tools selection for the Woods Equipment Company." Online version, 2001. http://www.uwstout.edu/lib/thesis/2001/2001blomdahlg.pdf.
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Lenss, Viesturs G. (Viesturs Gatis) 1962, and Gloria A. 1968 Pumpuni. "A systems engineering approach to managing communication in globally dispersed teams." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/29162.
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Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 2001.<br>Includes bibliographical references (leaves 197-202).<br>Globalization has caused firms to redefine regional strategies for distributed design and manufacturing into one of worldwide coordination and integration of resources in order to compete in the world market. This need to address customers and markets worldwide and to achieve a customer focus has led to restructuring of the organization, functions, activities and teams into globally dispersed entities. Globally dispersed teams are attractive because they promise benefits such as increased flexibility, responsiveness and lower costs factors critical to succeeding in this dynamic business environment. The major challenge facing product development and manufacturing organizations is to achieve high performing teams so that all the mentioned benefits can be realized. Globally dispersed teams not only face the challenges of traditional teams; their situation is usually further aggravated by a lack of personal contact, culture and language differences as a result of dispersion in space and time. These factors make communication both within and outside the team boundaries difficult and can negatively impact team performance. This thesis proposes that communication technology and multi-media capabilities can greatly enhance communication and organizational learning in the context of a globally dispersed team. Understanding which technologies and media solutions to apply in the face of culture, language and distance barriers in order to provide the most effective knowledge-sharing environment to support such a team is critical. By studying and analyzing the communication needs and media choices of dispersed product development teams and the impact of culture, language and distance differences on needs and choices, a method is proposed to design a communication environment and management strategies that reduce the effect of barriers and improve communications in globally dispersed teams.<br>by Viesturs G. Lenss and Gloria A. Pumpuni.<br>S.M.
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Tatikonda, Sekhar Chandra. "Control under communication constraints." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/16755.
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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.<br>Includes bibliographical references (p. 224-228).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>by Sekhar Chandra Tatikonda.<br>Ph.D.
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Brööks, Andrëw G. (Brööks Zoz). "Coördinating human-robot communication." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38888.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (p. 188-210).<br>As robots begin to emerge from the cloisters of industrial and military applications and enter the realms of coöperative partners for people, one of the most important facets of human-robot interaction (HRI) will be communication. This can not merely be summarized in terms of the ongoing development into unimodal communication mechanisms such as speech interfaces, which can apply to any technology. Robots will be able to communicate in physically copresent, "faceto-face" interactions across more concurrent modalities than any previous technology. Like many other technologies, these robots will change the way people work and live, yet we must strive to adapt robots to humans, rather than the reverse. This thesis therefore contributes mechanisms for facilitating and influencing human-robot communication, with an explicit focus on the most salient aspect that differentiates robots from other technologies: their bodies. In order to communicate effectively with humans, robots require supportive infrastructure beyond the communications capabilities themselves, much as do the humans themselves. They need to be able to achieve basic common ground with their counterparts in order to ensure that accurate and efficient communication can occur at all.<br>(cont.) For certain types of higher level communication, such as skill transfer, robots need some of the underlying cognitive mechanisms that humans both possess and assume to be present in other communicative agents. One of these general mechanisms is self-awareness. This thesis details development of these underlying infrastructure components. Four broad areas of human-robot communication are then investigated, and applied to four robotic systems with different physical attributes and computational architectures. The concept of minimal communication, in which a robot must communicate basic information without the benefit of immediately recognizable anthropomorphic features, is presented. A system for enabling spatial communication, in which the human and robot must achieve common ground and support natural physical communication in the presence of other physical objects in the shared environment, is described. A model for behavioral encoding of non-verbal communication is developed, including the expression of both body language and proxemics.<br>(cont.) Finally, the use of existing communications modalities to produce interactively shaped communication for future expression is introduced, through a system that allows a human director to coach a robot through an acting performance. The robots featured in this thesis are the "Public Anemone" interactive robot theatre exhibit and "Leonardo" humanoid robot interaction testbed of the MIT Media Laboratory's Robotic Life Group; the "Robonaut" autonomous humanoid astronaut assistant robot of NASA Johnson Space Center's Dextrous Robotics Laboratory; and the "QRIO" autonomous humanoid entertainment robots of Sony Corporation's Intelligence Dynamics Laboratories.<br>by Andrew G. Brooks.<br>Ph.D.
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Torrance, Mark C. (Mark Charles). "Natural communication with robots." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/88300.
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Richardson, Andrew Xenos. "Evaluating Human-Robot Implicit Communication through Human-Human Implicit Communication." Doctoral diss., University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5457.
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Human-Robot Interaction (HRI) research is examining ways to make human-robot (HR) communication more natural. Incorporating natural communication techniques is expected to make HR communication seamless and more natural for humans. Humans naturally incorporate implicit levels of communication, and including implicit communication in HR communication should provide tremendous benefit. The aim for this work was to evaluate a model for human-robot implicit communication. Specifically, the primary goal for this research was to determine whether humans can assign meanings to implicit cues received from autonomous robots as they do for identical implicit cues received from humans. An experiment was designed to allow participants to assign meanings to identical, implicit cues (pursuing, retreating, investigating, hiding, patrolling) received from humans and robots. Participants were tasked to view random video clips of both entity types, label the implicit cue, and assign a level of confidence in their chosen answer. Physiological data was tracked during the experiment using an electroencephalogram and eye-tracker. Participants answered workload and stress measure questionnaires following each scenario. Results revealed that participants were significantly more accurate with human cues (84%) than with robot cues (82%), however participants were highly accurate, above 80%, for both entity types. Despite the high accuracy for both types, participants remained significantly more confident in answers for humans (6.1) than for robots (5.9) on a confidence scale of 1 - 7. Subjective measures showed no significant differences for stress or mental workload across entities. Physiological measures were not significant for the engagement index across entity, but robots resulted in significantly higher levels of cognitive workload for participants via the index of cognitive activity. The results of this study revealed that participants are more confident interpreting human implicit cues than identical cues received from a robot. However, the accuracy of interpreting both entities remained high. Participants showed no significant difference in interpreting different cues across entity as well. Therefore, much of the ability of interpreting an implicit cue resides in the actual cue rather than the entity. Proper training should boost confidence as humans begin to work alongside autonomous robots as teammates, and it is possible to train humans to recognize cues based on the movement, regardless of the entity demonstrating the movement.<br>ID: 031001467; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Adviser: Waldemar Karwowski.; Title from PDF title page (viewed July 10, 2013).; Thesis (Ph.D.)--University of Central Florida, 2012.; Includes bibliographical references (p. 87-98).<br>Ph.D.<br>Doctorate<br>Industrial Engineering and Management Systems<br>Engineering and Computer Science<br>Industrial Engineering
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Islam, Kazi Y. "Wireless communication in harsh environments." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2023. https://ro.ecu.edu.au/theses/2722.
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The ability to communicate underwater is a lucrative capability for industries, academia and the military. In these sectors, underwater wireless communications (UWC) are used for a variety of applications, such as oil and gas exploration, the monitoring of undersea pipelines, oceanography, seismology, undersea surveillance, and the detection of mines. However, many of these undersea activities are deterred due to numerous challenges posed by the harsh underwater environment. Energy scarcity is one of the major challenges, as frequent recharging of underwater depleted nodes is not practical. Ensuring reliable and secure UWC is another major challenge since traditional techniques cannot be implemented due to energy shortages.
This thesis addresses the challenge of energy-efficient underwater communications and studies its implications for reliable and secure UWC. The thesis introduces new techniques that minimise energy consumption, extend network lifetime, and offer secure communications in UWC networks. Firstly, this thesis presents a hybrid multi-modal optoacoustic UWC technique that not only takes into account the variability in weather conditions that adversely affect UWC, but also the temporal changes in underwater traffic to select the best endto- end communication strategy and hence minimise UWC energy consumption. Second, in this thesis, a caching strategy is introduced that jointly works with renewable energybased charging of underwater nodes, which can significantly extend the optoacoustic UWC network lifetime. Third, a residual energy maximisation technique is introduced that can simultaneously improve communication security in optoacoustic UWC networks without sacrificing its energy budget.
Overall, this thesis contributes to this field of research by mainly investigating the energy aspect of UWC networks and by studying its effects on secure communications whilst introducing solutions to relevant research problems.
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Van, de Zande Georgia D. "Online communication among student design teams." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/115649.
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Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 79-82).<br>New technological developments are quickly changing the ways the product design community communicates in the workplace and in the classroom. Slack, an online communication software with some project management features, has become a popular communication tool among many workers and students. This thesis examines the Slack conversation conducted by 16 student product development teams in a course at MIT, 2.009: Product Engineering Processes. Following a typical product development process, teams of 17-20 students each used the online communication tool in addition to face-to-face meetings to design new products in one semester. The resulting conversations were analyzed for message count over the course of the semester, message count by day of the week and hour of the day, message count breakdown by user, and communication organization. From these results, it was observed that teams tended to increase their communication right before a deadline and decrease it right after. When viewing teams' communication patterns by day of the week and the hour of the day, it was seen that many teams increased their communication in a short period after team meetings. In both of these graphs, successful teams tended to have more consistent communication. There was a positive correlation (granted, with low a R-squared value) between the amount teams report working on the class and their Slack activity by day. When looking at a team's total amount of communication, it may indicate team members are working well, but it may also indicate they are struggling. Teams with higher levels of success tended to have a more organized communication structure than teams with lower levels of success, as assessed by instructors. In addition to the data collected in this thesis, further research is still needed to understand with more certainty how online communication patterns correlate to teams' levels of success or team behaviors.<br>by Georgia D. Van de Zande.<br>S.M.
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Piateski, Erin M. "A tactile communication system for navigation." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32347.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (leaves 42-43).<br>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 tested in a series of experiments using the vibrotactile displays. A variety of patterns of stimulation was evaluated to determine which was most effective, and the efficacy of two types of motors (pancake and cylindrical) was compared. The arm display was tested with sedentary subjects in the laboratory, and the torso display was tested both in the laboratory with sedentary subjects and outdoors with active subjects. The results indicated that identification of the vibrotactile patterns was superior on the torso as compared to the forearm, with subjects achieving 99-100% accuracy with seven of the eight patterns presented. The torso display was equally effective for both sedentary and active subjects.<br>by Erin M. Piateski.<br>S.M.
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Ncube, Ariage T. "Performance evaluation of a communication network." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/21963.
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This work uses a simulation package to analyze the performance of a specific X.25 Value Added Communication Network (VAN), comprising a Network Administrator and a cluster of Network Concentrators (NCs). Detailed models of the network elements are developed, and system performance is analyzed in terms of network response time for the terminal users communicating across the network, identification of areas of bottlenecks in the NC system, and NC system throughput. The througput parameter is represented by the percentage of the output traffic to the load offered from the network of terminals. The performance of the Network Administrator system is also modeled, focusing particularly on the automatic restoration of service to failed NCs through downloading of operating software sets over the X.25 network. The final part consists of a model of a modification of the network manager components of the network as proposed in the DM upgrade project. In this section, NC loading time is again the desired performance indicator. It is shown that there is no noticeable improvement in this parameter between the original system and the proposed upgrade, both systems having a minimum loading time of about 3.5 to 6 minutes for a small network.
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Chen, Fangzhou. "WIRELESS COMMUNICATION UNDER IMPERFECT SOURCE/CHANNEL INFORMATION." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503062069085737.
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Ulrich, Gary A. (Gary Alan) 1962. "Computer model for a towed submarine communication antenna." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9551.
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Thesis (Nav.E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1999.<br>Includes bibliographical references (leaves 97-98).<br>A finite difference computer model is developed to simulate the exposure statistics of a radio frequency buoyant antenna as it is towed in a random seaway. The model allows the user to prescribe antenna properties (length, diameter, density, etc.), sea conditions ( significant wave height, development of sea), and tow speed. The model then simulates the antenna-sea interaction for the desired duration to collect statistics relating to antenna performance. The model provides design engineers with a tool to predict antenna performance trends, and conduct design tradeoff studies. The antenna envisioned is a submarine floating antenna which would enable communications at speed and depth, greatly enhancing the stealth and survivability of the US Navy's submarine force.<br>by Gary A. Ulrich.<br>S.M.<br>Nav.E.
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Wibowo, Henry 1966. "Communication software for telescience." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/278227.
Full textAbstract:
This thesis presents a software development which enhances the applicability of the Operations and Science Instrument System (OASIS) software for teleoperation of scientific experiments or process plants at remote location. Software developed includes a TCP/IP communication interface for OASIS in the MicroVMS and SUN/Unix environments, and modification of previously developed software for a local controlling computer (LCC). Major improvements in software design implementation are done on the command processor task. A new software module is written for the communication part to accommodate the TCP/IP protocol which replaces the DECnet protocol. Results of comparison and measurements of both versions of OASIS are also presented.
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Harris, Nicholas Robert. "Ultrasonic communication through water-filled pipes." Thesis, University of Southampton, 1996. https://eprints.soton.ac.uk/47539/.
Full textAbstract:
A research project was commissioned to investigate using the water inside water filled pipes as the transmission medium for communication using ultrasound. An investigation of the theory of sound propagation in fluid filled pipes was undertaken, which has resulted in the ability to model the effects of signal frequency and pipe geometry, as well as transducer dimensions. This was augmented by a wide ranging experimental programme which covered the effects of corners and valves, as well as flow and bubbles in plastic walled and steel walled pipes. This work has resulted in design guidelines for the range of a practical system. A demonstration system was constructed and digital communication was demonstrated in the laboratory.