To see the other types of publications on this topic, follow the link: Design of digital systems.
Dissertations / Theses on the topic 'Design of digital systems'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Design of digital systems.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Chen, Tsorng-Ming. "Design validation of digital systems." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264452.
Full text
2
Stanton, Christian J. "Material feedback in digital design tools." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/62983.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture; and, (S.M. in System Design and Management)--Massachusetts Institute of Technology, Engineering Systems Division, September 2009.Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 67-69).
How do design tools feedback material behavior to the designer? Digital design tools in use by designers today provide a rich environment for design of form but offer little feedback of the material that ultimately realize that form. This lack of materialism limits the value of the design tool and the exploration of the design space where material behavior provides important feedback to the designer. This study examines the modes and value of material feedback in design, illustrates the challenge with current tools and suggests enhancements to design tools to support material feedback.
by Christian J. Stanton.
S.M.in System Design and Management
S.M.
3
Spiniak, Juan (Spiniak Irarrazaval). "Digital help service opportunities for communication service providers in the convergent digital home." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/67570.
Full textAbstract:
Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, February 2011.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 97-100).
Homes are becoming increasingly connected as new technologies allow users to access media and information from any-device at anytime. Notebooks, HDTVs, smartphones, media servers, photo cameras, and video cameras, all form part of this new digital ecosystem where - the vision says - information and content will flow easily across devices, enabled by simple and intuitive user interfaces. These new home technologies are, however, often too complex for most users. Only "digital-natives" or technology savvy groups have the necessary skills, knowledge or confidence to adopt them and to use them effectively. For the rest, trying them becomes painful and frustrating. Moreover, the ecosystem itself adds confusion, given the large number of players involved and the many different kinds of relationships. Unless a dominant player gains enough power to establish a dominant digital home architecture, or this happens in some other way, most companies will continue to innovate around device-specific features that don't address the overall complexity of the complete systems that users have to work with. Digital help services can assist users by simplifying the selection, installation, learning and troubleshooting of new services and devices; facilitating the adoption of new convergent technologies. There is a broad range of potential services, including, for example, 'over the top' (OTT) television integration, smartphone mentoring services, WiFi network configuration and desktop support services. Communication service providers should pay close attention to digital help services as an opportunity to differentiate their offer, strengthen their relationship with end-customers, reduce customer support costs and simplify the adoption of bandwidth-intensive technologies. Moreover, digital help services can speed up the adoption of OTT television services, and companies can use them strategically. The technology help space is evolving and communication service providers need to figure out how they want to participate: offer help services themselves; partner or acquire a existing technology support company; and/or create an open marketplace for technology help services.
by Juan Spiniak.
S.M.in Engineering and Management
4
Leaver, Andrew C. "FPGA design and systems compilation." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296767.
Full text
5
Li, Tao. "Digital assembly process design for aircraft systems." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7421.
Full textAbstract:
The research described in this thesis concentrates on the development of an integrated assembly process design for aircraft systems.
Assembly process design is one of the most important and complicated activities in aircraft manufacturing. Many solutions are suggested in previous research to develop process design method. But gaps are found in assembly process design of aircraft system in following studies. In this research, an integration approach which combined with product development philosophy, design for assembly method and digital assembly technology is proposed to solve the issues in the whole product development lifecycle. Three case studies from different design phase are used to examine the integrated process design method.
The research results demonstrate that the proposed digital process design method can be used to develop manufacturing strategies of system assembly in early design phase, and improve the accuracy and operability of assembly instructions according to 3-D assembly process plans in detailed design phase. The product design also benefits from this method in terms of correcting design errors in the concurrent engineering process.
A proposed process planning system framework based on lightweight CAD is developed in this research. The customized assembly representation of 3DVIA system illustrates the advantages of lightweight CAD when applying in shop floor.
6
Hicks, Dawn L. "Optimal design of digital model-following systems." Thesis, University of Salford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284423.
Full text
7
Meacham, Richard J. "High-level design routes for digital systems." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298949.
Full text
8
Talal, Mohammed. "Modem design for digital satellite communications." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/7442.
Full textAbstract:
The thesis is concerned with the design of a phase-shift keying system for a digital modem, operating over a satellite link. Computer simulation tests and theoretical analyses are used to assess the proposed design. The optimum design of both transmitter and receiver filters for the system to be used in the modem are discussed. Sinusoidal roll-off spectrum with different roll-off factor and optimum truncation lengths of the sample impulse response are designed for the proposed scheme to approximate to the theoretical ideal. It has used an EF bandpass filter to band limit the modulated signal, which forms part of the satellite channel modelling. The high power amplifier (HPA) at the earth station has been used in the satellite channel modelling due to its effect in introducing nonlinear AMAM and AM-PM conversion effects and distortion on the transmitted signal from the earth station. The satellite transponder is assumed to be operating in a linear mode. Different phase-shift keying signals such as differentially encoded quaternary phase-shift keying (DEQPSK), offset quaternary phase-shift keying (OQPSK) and convolutionally encoded 8PSK (CE8PSK) signals are analysed and discussed in the thesis, when the high power amplifier (HPA) at the earth station is operating in a nonlinear mode. Convolutional encoding is discussed when applied to the system used in the modem, and a Viterbi -algorithm decoder at the receiver has been used, for CE8PSK signals for a nonlinear satellite channel. A method of feed-forward synchronisation scheme is designed for carrier recovery in CE8PSK receiver. The thesis describes a method of baseband linearizing the baseband signal in order to reduce the nonlinear effects caused by the HPA at the earth station. The scheme which compensates for the nonlinear effects of the HPA by predistorting the baseband signal prior to modulation as opposed to correcting the distortion after modulation, thus reducing the effects of nonlinear distortion introduced by the HPA. The results of the improvement are presented. The advanced technology of digital signal processors (DSPs) has been used in the implementation of the demodulation and digital filtering parts of the modem replacing large parts of conventional circuits. The Viterbi-algorithm decoder for CE8PSK signals has been implemented using a digital signal processor chip, giving excellent performance and is a cost effective and easy way for future developments and any modifications, The results showed that, by using the various studied techniques, as well as the implementation of digital signal processor chip in parts of the modem, a potentially more cost effective modem can be obtained.
9
Ustunturk, Ahmet. "Digital Controller Design For Sampled-data Nonlinear Systems." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614267/index.pdf.
Full textAbstract:
In this thesis, digital controller design methods for sampled-data nonlinear systems are considered. Although sampled-data nonlinear control has attracted much attention in recent years, the controller design methods for sampled-data nonlinear systems are still limited. Therefore, a range of controller design methods for sampled-data nonlinear systems are developed such as backstepping, adaptive and robust backstepping, reduced-order observer-based output feedback controller design methods based on the Euler approximate model. These controllers are designed to compensate the effects of the discrepancy between the Euler approximate model and exact discrete time model, parameter estimation error in adaptive control and observer error in output feedback control which behave as disturbance. A dual-rate control scheme is presented for output-feedback stabilization of sampled-data nonlinear systems. It is shown that the designed controllers semiglobally practically asymptotically (SPA) stabilize the closed-loop sampled-data nonlinear system. Moreover, various applications of these methods are given and their performances are analyzed with simulations.
10
Singer, Amy M. (Amy Michelle). "Top-down design of digital signal processing systems." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40000.
Full textAbstract:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.Includes bibliographical references (leaves 45-46).
by Amy M. Singer.
M.Eng.
11
Groff, Wayne C. "Predetection filter design for practical digital communication systems." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5585.
Full text
12
Vettenburg, Tom. "Optimal design of hybrid optical digital imaging systems." Thesis, Heriot-Watt University, 2010. http://hdl.handle.net/10399/2438.
Full textAbstract:
Several types of pupil modulation have been reported to decrease the aberration variance of the modulation-transfer-function (MTF) in aberration-tolerant hybrid optical-digital imaging systems. It is common to enforce restorability constraints on the MTF, requiring trade of aberration-tolerance and noise-gain. In this thesis, instead of optimising specific MTF characteristics, the expected imaging-error of the joint design is minimised directly. This method is used to compare commonly used phase-modulation functions. The analysis shows how optimal imaging performance is obtained using moderate phasemodulation, and more importantly, it shows the relative merits of different functions. It is shown that the technique is readily integrable with off-the-shelf optical design software, which is demonstrated with the optimisation of a wide-angle reflective system with significant off-axis aberrations. The imaging error can also be minimised for amplitudeonly masks. It is shown that phase aberrations in an imaging system can be mitigated using binary amplitude masks. This offers a low-cost, transmission-mode alternative to phase correction as used in active and adaptive optics. More efficient masks can be obtained by the optimisation of the imaging fidelity.
13
Silva, Jeferson Santiago da. "Architectural exploration of digital systems design for FPGAs using C/C++/SystemC specification languages." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/119082.
Full textAbstract:
A crescente demanda por alto desempenho computacional e massivo processamento de dados tem impulsionado o desenvolvimento de sistemas-on-chip. Um dos alvos de implementação para sistemas digitais complexos são os dispositivos FPGA (Field-programmable Gate Array), muito utilizados para prototipação de sistemas e rápido desenvolvimento de produtos eletrônicos complexos. Certos aspectos ineficientes relacionados aos dispositivos FPGA estão relacionadas com degradação no desempenho e na potência consumida em relação ao projeto de hardware customizado. Neste contexto, esta dissertação de mestrado propõe um estudo sobre técnicas de otimização em FPGAs. Este trabalho apresenta uma revisão da literatura sobre os métodos de redução de potência e área aplicados ao projeto de FPGA. Técnicas para aumento de desempenho e aceleração do tempo de desenvolvimento de projetos são apresentadas com base em referencias clássicas e do estado-da-arte. O principal foco deste trabalho é discutir sobre as técnicas de alto nível e apresentar os resultados obtidos nesta área, comparando com os projetos HDL (Hardware Description Language) codificados a mão. Neste trabalho, é apresentado uma metodologia para o desenvolvimento rápido projetos digitais utilizando ambientes HLS (High-Level Synthesis. Estes métodos incluem eficiente particionamento de código de alto nível, para a correta exploração de diretivas de síntese em ferramentas HLS. Porém, o fluxo HLS não guiado apresentou pobres resultados de síntese quando comparado com modelos HDL codificado a mão. Para preencher essa lacuna, foi desenvolvido um método iterativo para exploração de espaço de projeto com o objetivo de melhorar os resultados de área. Nosso método é descrito em uma linguagem de script de alto nível e é compatível com o VivadoTM HLS Compiler. O método proposto é capaz de detectar pontos chave para otimização, inserção automatica de diretivas síntese e verificação dos resultados com objetivo de reduzir o consumo de área. Os resultados experimentais utlizando o método de DSE (Design Space Exploration) provaram ser mais eficazes que o fluxo HLS não guiado, em ao menos 50% para um processador VLIW e em 43% para um filtro FIR (Finite Impulse Response de 12a ordem. Os resultados em área, em termos de flip-flops, foram até 4X menores em comparação com o fluxo HLS não guiado, enquanto redução no desempenho ficou em cerca de 38%, no caso do processador VLIW. No exemplo do filtro FIR, a redução no número flip-flops chegou a 3X, sem relevante aumento no número de LUTs e redução no desempenho.The increasing demand for high computational performance and massive data processing has driven the development of systems-on-chip. One implementation target for complex digital systems are FPGA (Field-programmable Gate Array) devices, heavily used for prototyping systems or complex and fast time-to-market electronic products development. Certain inefficient aspects of FPGA devices relate to performance and power degradation with respect to custom hardware design. In this context, this master thesis proposes a survey on FPGA optimization techniques. This work presents a literature review on methods of power and area reduction applied to FPGA designs. Techniques for performance increasing and design speedup enhancing will be presented based on classic and state-of-the-art academic works. The main focus of this work is to discuss high-level design techniques and to present the results obtained in synthesis examples we developed, comparing with hand-coded HDL (Hardware Description Language) designs. In this work we present our methodology for fast digital design development using High-Level Synthesis (HLS) environments. Our methods include efficient high-level code partitioning for proper synthesis directives exploration in HLS tools. However, a non-guided HLS flow showed poor synthesis results when compared to hand-coded HDL designs. To fill this gap, we developed an iterative design space exploration method aiming at improving the area results. Our method is described in a high-level script language and it is compatible with the Xilinx VivadoTM HLS compiler. Our method is capable of detecting optimization checkpoints, automatic synthesis directives insertion, and check the results aiming at reducing area consumption. Our Design Space Exploration (DSE) experimental results proved to be more efficient than non-guided HLS design flow by at least 50% for a VLIW (Very Long Instruction Word) processor and 62% for a 12th-order FIR (Finite Impulse Response) filter implementation. Our area results in terms of flip-flops were up to 4X lower compared to a non-guided HLS flow, while the performance overhead was around 38%, for the VLIW processor compilation. In the FIR filter example, the flip-flops reduction were up to 3X, with no relevant LUTs and performance overhead.
14
Pihavaara, Jasmin. "Integrating Accessibility into Digital Design Processes : A Systemic Approach." Thesis, Jönköping University, Internationella Handelshögskolan, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49373.
Full textAbstract:
Today's digital products, services and experiences need to be designed with accessibility in mind in order to provide equal opportunities in use and enjoyment for the growing group of users with permanent, temporary and situational impairments. However, the topic still seems to be an afterthought in practice. With the research question 'What are the enablers and inhibitors for integrating accessibility into digital design processes from a systemic perspective?', this thesis aims to identify factors that drive or hinder accessibility efforts among design practitioners in Germany and how these factors may interrelate. Accessibility integration is therefore defined as a system. The research is based on a qualitative study using semi-structured interviews with four UX Designers, two UI Designers and one Chief Creative Officer with varying experiences regarding accessibility in past projects. By conducting a content analysis, the responses are grouped into categories and further visualized in the form of system archetypes to understand systemic behavior. The findings indicate that integration of accessibility into digital design processes is influenced by many enabling and inhibiting factors, of technical, individual, societal, institutional, regulatory, economic and financial as well as cliental and organizational nature, turning the topic into a complex, wicked problem. While economic reasons were a dominant force driving the system's behavior, it appears that the underlying mental models of all actors involved are significantly contributing to the state of accessibility in design practice.
15
Li, Yan Ph D. Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science. "Digital assistance design for analog systems : digital baseband for outphasing power amplifiers." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82353.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 145-150).
Digital assistance is among many aspects that can be leveraged to help analog/mixed-signal designers keep up with the technology scaling. It usually takes the form of predistorter or compensator in an analog/mixed-signal system and helps compensate the nonidealities in the system. Digital assistance takes advantage of the process scaling with faster speed and a higher level of integration. When a digital system is co-optimized with system modeling techniques, digital assistance usually becomes a key enabling block for the high performance of the overall system. This thesis presents the design of digital assistances through the digital baseband design for outphasing power amplifiers. In the digital baseband design, this thesis conveys two major points: the importance of the use of the reduced-complexity system modeling techniques, and the communications between hardware design and system modeling. These points greatly help the success in the design of the energy-efficient baseband. The first part of the baseband design is to realize the nonlinear signal processing unit required by the modulation scheme. Conventional approaches of implementing this functionality do not scale well to meet the throughput, area and energy-efficiency targets. We propose a novel fixed-point piece-wise linear approximation technique for the nonlinear function computations involved in the signal processing unit. The new technique allows us to achieve an energy and area-efficient design with a throughput of 3.4Gsamples/s. Compared to the projected previous designs, our design shows 2x improvement in energy-efficiency and 25x in area-efficiency. The second part of the baseband design devotes to the nonlinear compensator design, aiming to improve the linearity performance of the outphasing power amplifier. We first explore the feasibility of a working compensator by use of an off-line iterative solving scheme. With the confirmation that a compensator does exist, we analyze the structure of the nonlinear baseband-equivalent PA system and create a dynamical real-time compensator model. The resulting compensator provides the overall PA system with around 10dB improvement in ACPR and up to 2.5% in EVM.
by Yan Li.
Ph.D.
16
Lindgren, Per. "Applications of decision diagrams in digital circuit design." Doctoral thesis, Luleå tekniska universitet, EISLAB, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-16866.
Full textAbstract:
Design methodology of digital circuits is a rapidly changing field. In the last 20 years, the number of transistors on a single chip has increased from thousands to tens of millions. This sets new demands on the design tools involved, their ability to capture specifications on a high level, and finally synthesize them into hardware implementations. The introduction of Decision Diagrams (DDs) has brought new means towards solving many of the problems raised by the increasing complexity of todays designs. In this thesis, we study their use in VLSI CAD and develop a number of novel applications. Incomplete specifications are inherent to the functionality of almost all digital circuits. We present a design methodology providing a common basis between design validation and logic synthesis, namely the semantics of Kleenean Strong Ternary Logic. This is called upon as commonly used design methodologies, based e.g. on VHDL are shown to put design correctness in jeopardy. By an extension of DDs, we can efficiently represent and manipulate incompletely specified functions. The method presented, not only guarantees correctness of the final circuit, but also offers potential towards expressing and utilizing incompleteness in ways other methodologies are incapable of. The increasing density and speed of todays target technologies also changes the conditions for logic synthesis; e.g., traditional quality measures based on gate delays are becoming less accurate as delays caused by interconnections are raising their heads. To address this problem we propose methodologies allowing quality measures of the final circuit to be foreseen and considered throughout the whole synthesis process. In general this is a very hard task. We approach the problem by limiting our synthesis methodologies to those rendering regular layouts (Such as computational arrays and lattices). The regularity allows us to predict properties of the final circuit and at the same time, ensure design criteria to be met, e.g., path delays and routability of the final circuit. In this thesis, we develop new design methodologies and their algorithms. By our experimental results, they are shown to offer significant improvements to both state of the art two-level and multi-level based tools in the area of layout driven synthesis. Our minimization methods are based on Pseudo Kronecker Decision Diagrams (PKDDs) which are the most general type of ordered bitlevel diagrams for switching functions. In the thesis we elaborate on the properties of PKDDs and Ternary PKDDs (TPKDDs) and develop an efficient minimization method based on local variable exchange for TPKDDs. Furthermore, the problem of PKDD minimization is discussed and a number of different strategies are introduced and evaluated; the potential compactness of PKDDs is confirmed. The thesis spans from validation and verification of high-level specifications all the way down to layout driven synthesis, combining logic minimization, mapping and routing to the target architecture at hand. We conclude our work to offer new means towards solving many of the crucial problems occurring along the design process of modern digital circuits.Godkänd; 1999; 20061117 (haneit)
17
Grimes, Todd S. "Adaptive Power Analog-to-Digital Interface for Digital Systems." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1483366560887816.
Full text
18
Petropoulakis, L. "Design of digital trajectory tracking systems for robotic manipulators." Thesis, University of Salford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384976.
Full text
19
Stroph, Ralf. "Acceptance test design for fault tolerant, digital control systems." Thesis, University of York, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298586.
Full text
20
Dent, Alan. "Using dependent-types for specifying & verifying digital systems." Thesis, University of Kent, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282482.
Full text
21
Rivers, Mark G. "Object-oriented data management for digital electronics CAD systems." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386801.
Full text
22
Daempfling, Hauke C. "Design and implementation of the precision personnel locator digital transmitter system." Link to electronic thesis, 2006. http://www.wpi.edu/Pubs/ETD/Available/etd-122006-161049/.
Full textAbstract:
Thesis (M.S.)--Worcester Polytechnic Institute.Keywords: precision personnel locator; digital systems; embedded systems; waveform generation; data communication. Includes bibliographical references (leaves 108-110).
23
Lam, Lawrence G. "Digital Health-Data platforms : biometric data aggregation and their potential impact to centralize Digital Health-Data." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/106235.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, School of Engineering, System Design and Management Program, Engineering and Management Program, 2015.Cataloged from PDF version of thesis.
Includes bibliographical references (page 81).
Digital Health-Data is being collected at unprecedented rates today as biometric micro sensors continue to diffuse into our lives in the form of smart devices, wearables, and even clothing. From this data, we hope to learn more about preventative health so that we can spend less money on the doctor. To help users aggregate this perpetual growth of biometric "big" data, Apple HealthKit, Google Fit, and Samsung SAMI were each created with the hope of becoming the dominant design platform for Digital Health-Data. The research for this paper consists of citings from technology strategy literature and relevant journalism articles regarding recent and past developments that pertain to the wearables market and the digitization movement of electronic health records (EHR) and protected health information (PHI) along with their rules and regulations. The culmination of these citations will contribute to my hypothesis where the analysis will attempt to support my recommendations for Apple, Google, and Samsung. The ending chapters will encompass discussions around network effects and costs associated with multi-homing user data across multiple platforms and finally ending with my conclusion based on my hypothesis.
by Lawrence G. Lam.
S.M. in Engineering and Management
24
Carpenter, A. F. "An engine for the multi-level simulation of digital systems." Thesis, University of Manchester, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.255251.
Full text
25
Liew, Shirlene Nepacina. "Digital health in Singapore : building an ecosystem conducive for innovation-driven enterprises." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/105313.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, 2015.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 106-115).
Healthcare is undergoing a digital revolution. In Singapore, business-friendly policies, strong information technology capabilities, and a world-class healthcare system seem to provide the necessary ingredients for digital health businesses to thrive. However, the depth of digital health start-up activities still pales in comparison with more mature ecosystems like Boston. Some challenges of the digital health sector include requiring an understanding of a wide set of stakeholders, facilitating cross-disciplinary innovation across patient care and digital technologies, and propagating innovation in hospital environments. The digital health innovation-driven enterprises ecosystem in Singapore is explored through an in-depth analysis of Singapore hospitals as a key stakeholder and an assessment of healthcare hackathons' suitability in addressing the present gaps. A set of recommendations are presented that could help to promote activities conducive to digital healthcare innovation and entrepreneurship in Singapore, which include extending key stakeholders' networks as well as enhancing access to key human resources and mentoring during the early stages of start-up formation.
by Shirlene Nepacina Liew.
S.M. in Engineering and Management
26
Jin, Jie. "Low power design for high performance wireless digital baseband building blocks /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?ECED%202009%20JIN.
Full text
27
Gumienny, Raja Carola. "Understanding the adoption of digital whiteboard systems for collaborative design work." Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2014/7241/.
Full textAbstract:
User-centered design processes are the first choice when new interactive systems or services are developed to address real customer needs and provide a good user experience. Common tools for collecting user research data, conducting brainstormings, or sketching ideas are whiteboards and sticky notes. They are ubiquitously available, and no technical or domain knowledge is necessary to use them. However, traditional pen and paper tools fall short when saving the content and sharing it with others unable to be in the same location. They are also missing further digital advantages such as searching or sorting content. Although research on digital whiteboard and sticky note applications has been conducted for over 20 years, these tools are not widely adopted in company contexts. While many research prototypes exist, they have not been used for an extended period of time in a real-world context.
The goal of this thesis is to investigate what the enablers and obstacles for the adoption of digital whiteboard systems are. As an instrument for different studies, we developed the Tele-Board software system for collaborative creative work. Based on interviews, observations, and findings from former research, we tried to transfer the analog way of working to the digital world. Being a software system, Tele-Board can be used with a variety of hardware and does not depend on special devices. This feature became one of the main factors for adoption on a larger scale.
In this thesis, I will present three studies on the use of Tele-Board with different user groups and foci. I will use a combination of research methods (laboratory case studies and data from field research) with the overall goal of finding out when a digital whiteboard system is used and in which cases not. Not surprisingly, the system is used and accepted if a user sees a main benefit that neither analog tools nor other applications can offer. However, I found that these perceived benefits are very different for each user and usage context. If a tool provides possibilities to use in different ways and with different equipment, the chances of its adoption by a larger group increase. Tele-Board has now been in use for over 1.5 years in a global IT company in at least five countries with a constantly growing user base. Its use, advantages, and disadvantages will be described based on 42 interviews and usage statistics from server logs. Through these insights and findings from laboratory case studies, I will present a detailed analysis of digital whiteboard use in different contexts with design implications for future systems.Nutzerorientierte Gestaltungsprozesse werden angewandt, um zu gewährleisten, dass neue Software für Computer und Smartphones gebrauchstauglich ist und die tatsächlichen Bedürfnisse der Anwender adressiert. Dazu sollen potentielle Anwender befragt und beobachtet und darauf basierend Ideen und Entwürfe für die neue Software entwickelt werden. Um die Nutzerdaten und Ideen zu sammeln, sowie daraus Konzepte zu erarbeiten, werden häufig Whiteboards und Haftnotizen (Post-its) benutzt. Sie haben den Vorteil, dass sie weit verbreitet sind und keine speziellen Kenntnisse erfordern. Analoge Whiteboards sowie Stift und Papier haben allerdings auch den Nachteil, dass die Informationen nicht digital gespeichert und mit Personen an anderen Standorten geteilt werden können. Auch andere digitale Vorteile, wie z. B. Inhalte suchen und sortieren, sind nicht verfügbar. Obwohl es seit 20 Jahren Forschung zu digitalen Whiteboard-Anwendungen gibt, werden diese Systeme im Firmenumfeld kaum genutzt. Diverse Forschungsprototypen sind bisher weder im Langzeiteinsatz noch in Unternehmen ausreichend getestet worden. Ziel dieser Dissertation ist zu erforschen, welche Faktoren den Einsatz von digitalen Whiteboard-Systemen begünstigen und welche Faktoren eher hinderlich sind. Zu diesem Zweck haben wir das Tele-Board Software System für gemeinsames kreatives Arbeiten entwickelt. Basierend auf Interviews und Beobachtungen, sowie Erkenntnissen aus vorheriger Forschung, haben wir versucht, die analoge Arbeitsweise mit herkömmlichen Arbeitsmitteln in die digitale Welt zu übertragen. Tele-Board kann mit unterschiedlicher Hardware benutzt werden und ist nicht an spezielle Geräte gebunden. Diese Tatsache hat sich als Vorteil für den Einsatz der Software in größerem Umfang erwiesen. In dieser Arbeit präsentiere ich drei Studien zur Nutzung von Tele-Board von verschiedenen Anwendern in unterschiedlichen Umgebungen. Die Studien wurden sowohl unter kontrollierten Bedingungen, als auch im realen Arbeitsumfeld durchgeführt. Wie zu erwarten war, wird das System besonders dann angenommen, wenn die Anwender Vorteile sehen, die sie mit analogen Arbeitsmitteln und anderer Software nicht haben. Allerdings unterscheiden sich die empfundenen Vorteile je nach Anwender und Nutzungskontext. Daher steigen die Chancen auf eine Verbreitung der Software, wenn sie verschiedene Anwendungsfälle und unterschiedliches Equipment unterstützt. Tele-Board ist mittlerweile seit 1,5 Jahren in einer global agierenden IT-Firma in mindestens fünf Ländern mit konstant steigenden Nutzerzahlen im Einsatz. Auf der Basis von 42 Interviews und Nutzungsstatistiken vom Server wird beschrieben, auf welche Art und Weise das System angewandt wird und welche Vor- und Nachteile es hat. Aus diesen Erkenntnissen sowie anderen Studien, präsentiere ich eine detaillierte Analyse der Nutzung von digitalen Whiteboards und gebe Empfehlungen für die Entwicklung zukünftiger Systeme.
28
Merzougui, T. "Design of digital controllers for irregular linear multivariable plants." Thesis, University of Salford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308206.
Full text
29
Al-doori, Q. "Design of a smart power manager for digital communication systems." Thesis, University of Salford, 2017. http://usir.salford.ac.uk/43361/.
Full textAbstract:
Portable devices, like mobile phones, are in an increasing need for power due to the growing complexity of applications and services provided by them. At the same time, mobile devices need to adapt their communication techniques so as to be able to work with different communication standards. The need for a multistandard communication circuit arises to overcome such a problem. Unfortunately, these circuits need to consume a considerable amount of power to achieve their designed goal. The researchers use the Dynamic Voltage/Frequency Scheduling technique to reduce power consumption in digital systems. This method employs the task time to schedule the system supply voltage along the task time to reduce the overall consumed power. Since the task time in digital communication systems is not defined, the application of the dynamic voltage/frequency technique on such systems is not possible. In this research, a closer look at the digital circuit power dissipation is given. Then, a new power model is introduced which can predict the digital circuit instantaneous power dissipation accurately. This model is used to build a power control strategy that makes use of the frequency as a control parameter. A setup is carried out using MATLAB to simulate the power of a NOT gate, a multiplexer circuit, a full adder and a two-bit full adder. The results are compared with OrCAD Cadence simulation for the same circuits. The results show that the new model can simulate the power dissipation accurately under different voltages, frequencies, and different technology sizes. In the second part of this research, a smart power manager is designed based on a fuzzy logic controller. The smart power manager makes use of the measured power and the input frequency to produce the required voltage to the digital system. The smart power manager is tested on a multiplexer circuit, two-bit full adder circuit, and cyclic redundancy check circuits. The results of the simulations show that the manager can reduce up to 60% of the consumed power by these circuits in low frequencies and up to 5% of the consumed power in high frequencies. The smart power manager can fulfil the purpose of the dynamic voltage/frequency scheduling technique without the need for the task time. In the final part of this research, the Long Term Evolution (LTE) system is taken as a case study. A unique cyclic redundancy check circuit is designed. This circuit is directed to work with LTE systems, so it has three generators integrated into it. The circuit can select the needed cyclic redundancy generator and produce the required remainder for the LTE system. The smart power manager is modified to supply both the voltage and frequency to the new cyclic redundancy check circuit so that it can control its consumed power. The selection of frequency depends on the used cyclic redundancy generator and the used modulation technique. The selected frequency ensures that the data rate between the LTE stages is constant. The results of the setup show that the smart power manager is capable of reducing the power of the circuit by more than 40% if it was operating at a constant frequency. The smart power manager can lower the power of the cyclic redundancy check circuit by more than 20% if the circuit is running under variable clock frequency. The conclusion driven from the results above proves that the SPM can reduce the consumed power in multi standard systems and Software Defined Radio (SDR) circuits.
30
Krishnan, Ashok, and Kurt Kosbar. "AN INVESTIGATION INTO USING EXPERT SYSTEMS FOR DIGITAL FILTER DESIGN." International Foundation for Telemetering, 2003. http://hdl.handle.net/10150/605359.
Full textAbstract:
International Telemetering Conference Proceedings / October 20-23, 2003 / Riviera Hotel and Convention Center, Las Vegas, NevadaIt can be challenging to select the best architecture for DSP filters for a given application. Design constraints often include both objective and subjective information. This paper discusses the initial results of an investigation into using expert system techniques to address this problem. The goal is a system that allows users to specify traditional constraints such as impulse response, frequency response, stability, SNR, etc., but they may also constrain the filter’s cost, complexity, or any parameter which can be clearly identified for the specific application.
31
Ziegler, Dustin P. "Foundations of a defense digital platform : business systems governance in the Department of Defense." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70826.
Full textAbstract:
Thesis (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, 2012.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 149-155).
In 2010, the United States Department of Defense (DoD) spent more than $35 billion on information systems development and sustainment, with nearly $7 billion to defense business systems investments alone. It is not surprising given the scale of expenditure and complexity of the enterprise that its track record on business systems investments has not been great. Indeed, the DoD's investment management practices have been the target of many studies identifying critical concerns with how the taxpayers' dollars are spent. The get-well plan, according to these same studies, is to apply "industry best practices" to achieve the same results. Yet this view fails to adequately account for the underlying issues that give rise to these symptoms. Mistrust and confusion in governance decision structures, strategic goal misalignment, externally driven metrics that incentivize the wrong behavior, and a culture of guarding rather than sharing information were among the dominant challenges identified through stakeholder interviews. Cross-cutting issues included language barriers between the Services and Corporate DoD that impede knowledge integration and complicate performance measurement. These systemic foundational problems are deeply rooted in the nature of this public administration network and in the cultures of its strongly independent member institutions. Resolving these dysfunctional characteristics requires more than a transformation "playbook" of best practice initiatives. This research sets the trajectory for meaningful progress in defense business systems investment planning and management by outlining the fundamental changes that must occur, anchored by a more robust and transparent governance framework.
by Dustin P. Ziegler.
S.M.in Engineering and Management
32
Burns, Francis P. "Transformational reasoning applied to the high-level synthesis of digital systems." Thesis, University of Newcastle Upon Tyne, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316217.
Full text
33
Chimakurthy, Lakshmi Sri Jyothi Dai Foster. "Design of direct digital frequency synthesizer for wireless applications." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/master's/CHIMAKURTHY_LAKSHMI_54.pdf.
Full text
34
Matoglu, Erdem. "Statistical design, analysis, and diagnosis of digital systems and embedded RF circuits." Diss., Available online, Georgia Institute of Technology, 2004:, 2003. http://etd.gatech.edu/theses/available/etd-06072004-131249/unrestricted/matoglu%5Ferdem%5F200405%5Fphd.pdf.
Full text
35
Ali, Rahman. "Design of Building Blocks in Digital Baseband Transceivers for Body-Coupled Communication." Thesis, Linköpings universitet, Elektroniksystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110562.
Full textAbstract:
Advances in communication technologies continue to increase information sharing among the people.~Short-range wireless networking technologies such as Bluetooth or ZigBee, which are mainly used for data transfer over short range, will, however, suffer from network congestion, high power consumption and security issues in the future. The body-coupled communication (BCC), a futuristic short-range wireless technology, uses the human body as a transmission medium. In BBC channel, a small electric field is induced onto the human body which enables the propagation of a signal between communication devices that are in the proximity or direct contact with the human body. The direct baseband transmission and simple architecture make BCC an attractive candidate for a future short-range wireless communication technology in particular applications such as body area network. The main focus of this thesis is on the design and implementation of digital baseband transmitter and receiver for the body-coupled communication. The physical layer (PHY) implementation of the digital baseband transmitter and receiver is inspired from the IEEE 802.3 Ethernet transmission protocol. The digital design is implemented at RTL level using hardware description language (VHDL). The functionality of the digital baseband transmitter and receiver is demonstrated by developing data transfer application layers.
36
Wang, Zhongli. "New methods for the direct digital control of discrete-time systems." Thesis, Lancaster University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383582.
Full text
37
Tolbert, Jeremy Reynard. "Energy-efficient digital design of reliable, low-throughput wireless biomedical systems." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45787.
Full textAbstract:
The main objective of this research is to improve the energy efficiency of low throughput wireless biomedical systems by employing digital design techniques. The power consumed in conventional wireless EEG (biomedical) systems is dominated by digital microcontroller and the radio frequency (RF) transceiver. To reduce the power associated with the digital processor, data compression can reduce the volume of data transmitted. An adaptive data compression algorithm has been proposed to ensure accurate representations of critical epileptic signals, while also preserving the overall power. Further advances in power reduction are also presented by designing a custom baseband processor for data compression. A functional system has been hardware verified and ASIC optimized to reduce the power by over 9X compared to existing methods. The optimized processor can operate at 32MHz with a near threshold supply of 0.5V in a conventional 45nm technology. While attempting to reach high frequencies in the near threshold regime, the probability of timing violations can reduce the robustness of the system. To further optimize the implementation, a low voltage clock tree design has been investigated to improve the reliability of the digital processor. By implementing the proposed clock tree design methodology, the digital processor can improve its robustness (by reducing the probability of timing violations) while reducing the overall power by more than 5 percent. Future work suggests examining new architectures for low-throughput processing and investigating the proposed systems' potential for a multi-channel EEG implementation.
38
Sinyor, Elliot. "Digital musical instruments : a design approach based on moving mechanical systems." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99606.
Full textAbstract:
This thesis describes the design and use of two novel digital musical instruments (DMIs) based on moving mechanical systems. The motivation behind using mechanical devices was threefold: to explore the effect of physical effort on DMIs, to make use of the device's inherent haptic and visual feedback, and to serve as a starting point for sound mappings. It was hoped that their mechanical nature would give the instruments a character that could emerge through each of the mappings. The first DMI built was the Gyrotyre, a hand-held DMI based around a small bicycle wheel outfitted with sensors that measure its speed of rotation and as well as its angle of orientation. The second DMI built was the Springwave, which consists of a loose metal spring stretched to one meter and fixed at both ends to a metal frame. The frame is in turn mounted horizontally on a hi-hat stand so that it can be raised and lowered with the pedal, thus inducing oscillation in the spring. Various mappings were designed to reflect and make use of the physical nature of both instruments. It was found that the nature of interaction with each instrument was very different depending on the mapping used. The use of mechanical devices was found to be a useful starting point for the development of mappings, and made playing the instruments engaging for the performer by the relationship between DMIs and musical contexts, a framework for characterizing DMIs that takes musical context into account is presented.
39
Na, Jongwhoa. "Design and simulation of digital optical computing systems for artificial intelligence." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186989.
Full textAbstract:
Rule-based systems (RBSs) are one of the problem solving methodologies in artificial intelligence. Although RBSs have a vast potential in many application areas the slow execution speed of current RBSs has prohibited them from the full exploitation of their vast potential. In this dissertation, to improve the speed of RBSs, we explore the use of optics for the fast and parallel RBS architectures. First, we propose an electro-optical rule-based system (EORBS). Using two-dimensional knowledge representation and a monotonic reasoning scheme, EORBS provides highly efficient implementation of the basic operations needed in rule-based systems, namely, matching, selection, and rule firing. The execution speed of the proposed system is theoretically estimated and is shown to be two orders of magnitude faster than the current electronic systems. Although EORBS shows the best performance in execution speed compared to other RBSs, the monotonic reasoning scheme restricts the application domains of EORBS. In order to overcome this limitation on the application domain in EORBS, a general purpose RBS, called an Optical Content-Addressable Parallel Processor for Expert Systems (OCAPP-ES) is proposed. Using a general knowledge representation scheme and a parallel conflict resolution scheme, OCAPP-ES executes the three basic RBS operations on general knowledge (including variables, symbols, and numbers) in a highly parallel fashion. The performance of OCAPP-ES is theoretically estimated and is shown to be an order of magnitude slower than that of EORBS. However, the performance of OCAPP-ES is still an order of magnitude faster than any other RBS. Furthermore, OCAPP-ES is designed to support the general knowledge representation scheme so that it can be a high speed general purpose RBS. To verify the proposed architectures, we developed a modeling and simulation methodology for digital optical computing systems. The methodology predicts maximum performance of a given optical computing architecture and evaluates its feasibility. As an application example, we apply this methodology to evaluate the feasibility and performance of OCAPP which is the optical match unit of OCAPP-ES. The proposed methodology is intended to reduce optical computing systems' design time as well as the design risk associated with building a prototype system.
40
Ozdemir, Ersin. "Evolutionary methods for the design of digital electronic circuits and systems." Thesis, Cardiff University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326874.
Full text
41
Abidin, Zainal. "Design of digital high-accuracy trajectory tracking systems for multivariable plants." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304589.
Full text
42
Tsai, Judy. "Design and implementation of an online laboratory for introductory digital systems." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/37062.
Full textAbstract:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.Includes bibliographical references (p. 63-64).
In this thesis, I designed and implemented an online, web-based laboratory system for the Introductory Digital Systems Laboratory course at MIT (6.111). The intent is to allow a student access to a 6.111 labkit, program it, and view the results without ever entering the physical lab room. The lab architecture consists of primarily of two portions: a server and a client. The server programs the Xilinx FPGA on the labkit, and it controls the logic analyzer used to observe the labkit signals. The client is a Java applet that can send code to the server and retrieve logic analyzer data from the server. The user can view and manipulate the retrieved data through the client. The applet is embedded in a web page, along with a video stream that shows the labkit setup live to the user. The user interface is designed to be accessible from any browser, independent of platform.
by Judy Tsai.
M.Eng.
43
Farrell, John Patrick. "Digital Hardware Design Decisions and Trade-offs for Software Radio Systems." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/33294.
Full textAbstract:
Software radio is a technique for implementing reconfigurable radio systems using a combination of various circuit elements and digital hardware. By implementing radio functions in software, a flexible radio can be created that is capable of performing a variety of functions at different times. Numerous digital hardware devices are available to perform the required signal processing, each with its own strengths and weaknesses in terms of performance, power consumption, and programmability. The system developer must make trade-offs in these three design areas when determining the best digital hardware solution for a software radio implementation.
When selecting digital hardware architectures, it is important to recognize the requirements of the system and identify which architectures will provide sufficient performance within the design constraints. While some architectures may provide abundant computational performance and flexibility, the associated power consumption may largely exceed the limits available for a given system. Conversely, other processing architectures may demand minimal power consumption and offer sufficient computation performance yet provide little in terms of the flexibility needed for software radio systems. Several digital hardware solutions are presented as well as their design trade-offs and associated implementation issues.Master of Science
44
Kwan, Man-Wai. "Minimal transmit redundancy FIR precoder-equalizer systems design /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?ELEC%202004%20KWAN.
Full text
45
Fass, John. "Representing experiences of digital systems : the design and use of externalising models." Thesis, Royal College of Art, 2018. http://researchonline.rca.ac.uk/3445/.
Full textAbstract:
This is a PhD by practice that explores how people’s experiences of digital systems can be made physically and visually apparent using models and activities I have designed. The theoretical context for this PhD centres on internal and external models of people’s experiences with digital systems. This is an AHRC funded PhD written as part of the Creative Exchange, which supports collaborative research projects conducted with industry and academic partners. The way people experience digital systems can be dif cult to observe, and is experienced via complex, fragmented interfaces with hidden effects. We often nd that digital systems have a attening effect, and are frustrating and confusing to use, while our actions and behaviours are invisibly tracked and analysed. There is thus a need for people to gain awareness of the ways they experience digital systems. My primary research question focuses on the design characteristics of visual and physical models that externalise individual and group experiences of digital systems. Secondary questions include: What effects do the material properties of externalising models have on how digital systems are represented? and What types of activities externalise representations of digital systems? These questions are explored through case studies that focus on a set of digital systems identi ed through the research including web browsing, digital social networks, and image metadata. The first two case studies are exploratory, the third is applied. I completed these case studies in three collaborative settings, employing qualitative data collection methods including drawing, physical modelling and semi-structured interviews. I draw on theories of representation and cognition, and Dix and Gongora’s theory of externalisation in design, and apply them to new contexts and situations. My units of analysis are the externalising models and participants’ spoken accounts of making them. The ndings include: externalising experiences of digital systems using diverse materials is a way of countering attening effects; deploying new non-linguistic metaphors to represent experiences of digital systems is an important way of understanding and communicating them; and designing situations where people can create self-constructed representations of their experiences of digital systems enables narrative sequences, tangible expressions, and shared descriptions. My research is useful for the insight it provides participants into their own experiences with everyday digital systems, giving them better ways of understanding how digital systems shape their lives. It is also useful for designers working with people to nd out about their experiences of digital systems, and design researchers who are developing novel elicitation methods. My original contributions to knowledge include new contexts for externalising models, applying externalisation to experiences of digital systems, and recommendations for how designers can create objects and activities to externalise the experiences of digital systems of non- designers.
46
Qian, Xinben Garrison. "Adaptive systems in digital communication designs." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38821.
Full textAbstract:
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.Includes bibliographical references (leaves 98-100).
by Xinben Garrison Qian.
M.S.
47
Zhang, Xiaoming S. M. Massachusetts Institute of Technology. "The state of digital marketing -- technology and business landscape." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/107586.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, School of Engineering, System Design and Management Program, Engineering and Management Program, 2016.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 87-92).
Digital marketing has grown rapidly over the last two decades into a multi-billion dollar industry with thousands of companies operating in the space. Its' digital advertisement model has provided crucial economic backbone to support the proliferation of free digital content around the world. However, the industry is now facing significant challenges and controversy around Ad Blocking. The rapidly rising adoption of Ad Blocking is threatening the fundamentals in the digital advertisement model, and could have a profound impact on digital marketing and Internet content consumption. In this thesis, we research online resources to describe the latest technology and business landscape for the digital marketing industry, including the main digital marketing platforms, and system decomposition for its key subsystem Ad Tech industry. We then introduce the Ad Blocking controversy. We use stakeholder value network analysis to analyze how various market responses to Ad Blocking satisfy the system stakeholder values, hoping to shed lights on possible directions for solving the challenge systematically.
by Xiaoming Zhang.
S.M. in Engineering and Management
48
Wagner, Paulo Rech. "Um ambiente integrado de simulação de sistemas digitais." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1991. http://hdl.handle.net/10183/26693.
Full textAbstract:
O trabalho apresenta os recursos oferecidos ao usuario do ambiente de projeto AMPLO para o controle e gerencia do processo de simulação de sistemas digitais. O ambiente de simulação proposto a constituído por diversas ferramentas baseadas em recursos gráficos- interativos. As ferramentas do ambiente permitem executar funções como : construir modelos de simulação a partir das descrições de sistemas armazenadas na base de dados, gerar estados iniciais para os modelos de simulação através de estratégias de inicialização pré-definidas, criar estímulos a serem aplicados aos modelos de simulação utilizando linguagens gráficas e textuais dedicadas, vincular estímulos as entradas primarias dos modelos de simulação, controlar a simulação através dos comandos de simulação disponíveis na sessão de simulação, analisar os resultados das simulações já, realizadas através de recursos gráficos de visualização e criar uma sequência de comandos que devem ser executados dentro de uma sessão de simulação. O ambiente de simulação integra todos os dados gerados durante o processo de simulação em uma base de dados única. Para isto, os objetos manipulados pelas diversas ferramentas do ambiente e as relações existentes entre eles foram definidos de acordo com um modelo de dados uniforme que e a base para a implementação de uma base de dados íntegra e não redundante. A interface de acesso a esta base de dados a constituída por funções primitivas que realizam o acesso a cada um dos objetos. Estas primitivas de acesso a base de dados permitem a criação, alteração e remoção dos objetos mantendo a consistência geral dos mesmos, bem como vários tipos de consultas. O processo de simulação propriamente dito a controlado por um conjunto de funções próprias para a simulação disponíveis na sessão de simulação. A sessão de simulação apresenta uma linguagem de comandos que através de recursos de visualização gráfico-interativos permite ao usuário, entre outros recursos, alterar e monitorar valores de sinais do modelo de simulação e controlar o avanço do tempo de simulação. A sessão de simulação realiza a comunicação com os simuladores através de um sistema de troca de mensagens onde para cada comando fornecido durante a sessão de simulação, uma mensagem é acrescentada ao conjunto de mensagens enviadas ao simulador.This work describes the facilities that are available to the user of the AMPLO design environment for controlling and managing the process of digital systems simulation. The proposed simulation environment is composed by several tools that are of graphical-interactive nature. These tools support tasks like: building simulation models from system descriptions stored in the data base, generating initial states for the models according to various initialization strategies, creating stimuli to be applied to the models by using dedicated graphical and textual languages, associating stimuli to the primary inputs of the models, controlling the simulation run through a specialized command language, and analyzing results of already executed simulation runs. The environment integrates all data that is generated during the simulation process in a unique data base. Therefore, objects that are manipulated by the several tools of the environment, as well as relationships between them, have been defined according to a uniform data model which is the basis for the implementation of a consistent and non-redundant data base. The access interface to this data base is composed by primitive functions that implement the access to the objects. These functions allow the creation, modification, and removal of objects, while maintaining their overall consistency, as well as several queries. The process of simulation itself is controlled by a command language. These commands are available during the simulation session, which integrates the environment with the AMPLO simulators through a message system. The command language, through graphical-interactive visualization facilities, allow the user to modify and monitor signals values of the model and to control the simulation time advancement. Each command issue adds a new message to a message queue to be sent to the simulator.
49
Han, Sijing. "Design and Modeling Environment for Nano-Electro-Mechanical Switch (NEMS) Digital Systems." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1354568246.
Full text
50
Schmelzer, Raymond Matthew. "Practical Wired Digital Communications Link Analysis." PDXScholar, 2016. http://pdxscholar.library.pdx.edu/open_access_etds/3143.
Full textAbstract:
This thesis deals with the analysis of a Wired High Speed Serial Data Link (PAM2) which is commonly used throughout the data-communications and tele-communications industry. The goal of this study is to build a scalable simulation tool using Matlab that ultimately uses Receiver Bit Error Ratio (BER) as the metric for data link health. This study is also designed to aid in link specification development.
The Matlab and theoretical development is broken up into three sections being Transmitter (TX), Channel (Hs) and Receiver (RX). Realistic noise impairments can be added to each section along the signal path creating signal stresses commonly seen in data center applications. The TX function is designed to create random and periodic timing jitter, voltage noise and deterministic pre-distortion filtering effects. For the channel response s-parameters are used as the model result for many commonly seen channel loss and reflection scenarios. The RX model uses signal to noise ratio and vertical eye margin to determine the equalized link BER.
The study results show many tradeoffs between noises, RX Equalizer, RX gain and RX BER. The simulation results also reveal that there is no closed form solution for converging the modern closed-eye PAM2 detector.