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Dissertations / Theses on the topic 'Device integration'
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Raja, Hamran, and Roshan Lee. "Integration of a Drainage Device." Thesis, KTH, Tillämpad maskinteknik (KTH Södertälje), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190025.
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Lim, Desmond Rodney. "Device integration for silicon microphotonic platforms." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/16784.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.<br>Also available online at the MIT Theses Online homepage <http://thesis.mit.edu/><br>Includes bibliographical references (p. 199-211).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Silicon ULSI compatible, high index contrast waveguides and devices provide high density integration for optical networking and on-chip optical interconnects. Four such waveguide systems were fabricated and analyzed: crystalline silicon-on-insulator (SOI) strip, polycrystalline silicon (polySi) strip, silicon nitride strip and SPARROW waveguides. The loss of 15 dB/cm measured through an SOI waveguide was the smallest ever measured for a silicon strip waveguide and is due to improved side-wall roughness. The TM mode of a single mode polySi strip waveguide with a 1:2.5 aspect ratio exhibited, surprisingly, smaller loss than the TE mode. Further, analysis shows that high index contrast waveguides are more sensitive to polarization dependent loss in the presence of surface roughness. Single mode bends and splits in both silicon and silicon nitride were studied. 0.01 dB/turn loss has been measured for 2 micron radius silicon bends. Polarization dependent loss was also observed; the bending loss of a TM mode was, as expected, much larger than that of a TE mode. The splitting losses for two-degree Y-split was 0.15 dB/split. A 1x16 multi-mode interferometer splitter occupied an area of 480 sq-microns and exhibited loss of 3 dB. ULSI compatible waveguide structures integrated with micro-resonators have been studied. Qs of 10000 and efficiencies close to 100% were achieved in high index contrast ring resonators and Qs of 100 million were achieved in microsphere resonators. A thermal and mechanical tuning mechanism was demonstrated for micro-ring resonators.<br>(cont.) In addition, >95% coupling efficiency between SPARROW waveguides and microspheres was achieved, the first microspheres to be coupled to integrated optics waveguides. 1x4 wavelength division multiplexing devices have been, for the first time, demonstrated in high index contrast silicon and silicon nitride strip waveguide systems. These systems have a component density of 1-million devices/sq-cm. Higher order filters made from multiple rings exhibited flat top responses and the expected steeper roll-off resonance response. Integrated modulators and switches based on waveguides and rings were also studied. Finally, the integration of the components in systems applications was analyzed. A study of the effect of polarization and loss in silicon microphotonics waveguide systems is presented.<br>by Desmond Rodney Lim Chin Siong.<br>Ph.D.
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Bruno, B. "Secure Mobile Device Integration for Automotive Telematics." Thesis, Honours thesis, University of Tasmania, 2005. https://eprints.utas.edu.au/241/1/bpbruno_Thesis.pdf.
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The vehicle is a challenging environment in which to interact with computing devices. Therefore, the vehicle environment offers computing a unique challenge, in that a method for safe and secure mobile device integration is required in order to provide a suitable communications channel for interaction with devices without distracting from the primary driving task.
Moreover, a security architecture is required for mobile device integration in the vehicle paradigm. This architecture must be scalable, efficient and most importantly built on trusted and mathematically sound algorithms.
This thesis examines the relevant literature in the field of automotive telematics, including the notion of mobile device integration. Moreover, issues in the vehicle paradigm are also discussed which include driver distraction, and the legal ramifications of in-vehicle mobile phone use. From a system design view point this thesis will then provide an overview of the design requirements for telematics products, and outline possible security protocols which could be implemented on constrained mobile devices.
The ultimate aim of this thesis is to develop a security architecture for mobile device integration for automotive telematics based on the simple network management protocol (SNMPv3) user security model.
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Lippitt, Alex. "Development of a bioimpedance-based swallowing biofeedback device with smart device integration." Thesis, University of Canterbury. Electrical and Computer Engineering, 2015. http://hdl.handle.net/10092/10975.
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Low resolution pharyngeal manometry is an invasive diagnostic method that has recently been used as a biofeedback device for swallowing rehabilitation. The University of Canterbury Rose Centre uses pharyngeal manometry to diagnose and rehabilitate subjects who suffer from pharyngeal mis-sequencing. Pharyngeal mis-sequencing occurs when pressure is applied simultaneously throughout the pharynx rather than sequentially. Rehabilitation can only be performed in clinic due to the need for specialized equipment and trained staff, and the invasiveness of the test limits the time that can be spent training.
As an alternative method to measure the pharyngeal pressure sequence, bioimpedance has been investigated by a previous University of Canterbury Master’s student. A prototype was developed that measured bioimpedance in two locations as a proxy for pharyngeal pressure sequence. The prototype device named GULPS (Guided Utility for Latency in Pharyngeal Swallowing), measured a change in impedance during swallowing. However, the features of this waveform were inconsistent and were not present during every swallow.
The frequency of the current that passes through tissue affects its path through the tissue, therefore impacting the measured impedance. To improve the consistency of the impedance measurement, the effect of current injection frequency was investigated. A modular-hardware system was created from the original design to allow testing of different injection frequencies. The hardware was further developed by replacing the method of generating the constant amplitude current injection signal.
The improvement to the design resulted in a differently-shaped waveform to that of the previous prototype, including a new feature. This feature is a single peak that occurred in both channels and was reproduced in every swallow. Experimentation showed that the features were not obviously frequency dependent. The separation between the peaks of the two impedance channels was compared with the separation between the two pressure peaks recorded during simultaneous pharyngeal manometry but there was no significant correlation between the two measures of peak-peak separations.
Two alternative hardware/signal conditioning changes were trialled: electrical isolation of each channel and a subtraction method, which aims to remove the effect of the changing impedance between the two electrode channels. Electrical isolation of the two channels had no effect on the impedance waveforms. However, the subtraction method produced a different output and requires further investigation as the output was inconsistent.
Bluetooth communication was integrated into the GULPS hardware, and a corresponding Android Application (App) was written. The developed App was successful in displaying the impedance measurement output and adds greater user flexibility, allowing the user to interface with the bioimpedance measurement hardware from their tablet or phone.
With no measured significant correlation between GULPS and pharyngeal manometry, further research needs to be performed to better relate the features measured by GULPS to those seen during pharyngeal manometry. Until this can be achieved, the GULPS device cannot replace pharyngeal manometry for biofeedback-based rehabilitation of pharyngeal mis-sequencing.
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Liddiard, C. L. "Charge integration and multigrid techniques in semiconductor device simulation." Thesis, Swansea University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637908.
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Science and technology is experiencing a period of very rapid change which is euphemistically referred to as the information technology revolution. The main impetus for the latter is born of the ability to fabricate many thousands of devices on a single slice of monolithic crystal, otherwise known as the 'chip'. The ability to do this has meant that the power of the computer touches all facets of society. It is not surprising, therefore, that a great deal of emphasis is placed upon device fabrication. As functional circuits use more and more components, device geometries get progressively smaller, so that the only realistic way of predicting the behaviour of a device is through a computer model, or a device simulation. It is in obtaining improvements in the latter that forms the motivation for this thesis. In the early part of the thesis, the essential groundwork in electronic devices is covered. It serves to introduce both devices and approximate analytic modelling, thus showing the advantages of full numerical simulation. The results obtained serve as qualitative references, giving an idea of the type of solutions to be expected. The calculation of charge integrals is investigated. A fully consistent method contrasts the simpler 'lumping', and results for both formulations are presented. These results have prompted analytic investigations, which, in one dimension, have highlighted serious stability problems in consistent charge integration. In two dimensions, consistent charge integration has also been shown to produce oscillatory results. The origin of these 'wiggles' has been demonstrated as dependent on the mesh topology, showing fully consistent integration to be impractical. This leads to the recommendation of charge 'lumping', which extends to higher dimensions also. An exposition of the 'Multigrid' method is given, with particular emphasis on application to device simulation. All algorithms utilised are described, with detailed definition of problem dependent parameters. An optimal damping factor for damped Jacobi relaxation has been developed in respect of the Pisson equation. The contraction map defined may be extended to allow a fully consistent definition of the map for a general finite element discrete system. 'Multigrid' has been shown to be viable, within the limits of the model presented, for the continuity equations. The final chapter of the thesis serves to unite the material presented. The innovative aspects of the work are highlighted, with particular reference to previously published activity in these areas. This naturally describes the significance of the thesis in device simulation literature.
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Tibavinsky, Ivan Andres. "A microfabricated rapid desalting device for integration with electrospraying tip." Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52226.
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Electrospray Ionization (ESI) is a technique that permits the soft ionization of large proteins and biomolecules without fragmenting them, which allows them to be characterized via Mass Spectrometry (MS). It has the potential of permitting the identification of transient intermediate products in biological processes in situ, which would provide great insight to researchers in the growing fields of proteomics and metabolomics. However, this application presents a technical challenge in that most relevant biochemistry occurs in aqueous solutions with high salt content, which makes successful identification of analytes by ESI-MS difficult. This thesis presents the design, fabrication, and characterization of a microfabricated dialysis module that could alleviate this issue by desalting samples inline between sampling and electrospraying interfaces. Its small volume (~10 nL) minimizes sample transit time and, thus, optimizes ESI-MS analysis temporal resolution. A preliminary analytical model of dialysis elucidates the key performance parameters and sets the guidelines for consideration in its design. The device is then microfabricated in a cleanroom environment using techniques that have been well established by the microelectronics industry such as E-beam evaporation and Reactive Ion Etching. The system efficiency is demonstrated experimentally by assessing its salt removal effectiveness as a function of sample residence time. Mass spectrometry analyses of proteins in solutions with high salt content further corroborate its performance.
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FARAONE, GABRIELE. "Two-Dimensional Phosphorus: From the Synthesis Towards the Device Integration." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2021. http://hdl.handle.net/10281/304380.
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Gli allotropi bidimensionali (2D) del silicio e del fosforo sono stati i predecessori fra i materiali monoelementali 2D dopo il grafene. I vantaggi scientifici e tecnologici di questi materiali richiedono lo sviluppo di schemi di processo che possano garantire la loro effettiva integrazione in nuovi dispositivi per la nanoelettronica. In questo lavoro di tesi, sono stati investigati alcuni degli ostacoli ancora irrisolti lungo la strada per l’integrazione in dispositivo degli allotropi 2D del fosforo considerando specificatamente il caso delle fasi 2D α-P (corrispondente a un singolo strato di fosforo nero o fosforene) e \ β -P (fosforene-blu).
L’integrazione della fase 2D α-P nell’architettura di un dispositivo è stata oggetto di ampie ricerche e si basa su un percorso abbastanza consolidato che ha portato ad applicazioni che spaziano in un’ampia gamma di campi. Uno dei pochi ostacoli rimanenti su questo percorso è la mancanza di un metodo scalabile per produrre 2D α-P su grandi aree e con un accurato controllo dello spessore. In particolare, tale controllo è difficile da raggiungere nell’esfoliazione di cristalli stratificati di fosforo nero (BP). A questo proposito, la spettroscopia micro-Raman è stata usata sia come uno strumento metrologico per determinare lo spessore delle scaglie cristalline esfoliate che come metodo per raggiungere una controllata riduzione del loro spessore sfruttando la tecnica di assottigliamento laser. Tuttavia, i metodi di determinazione dello spessore basati sulla calibrazione delle intensità delle bande Raman sono stati investigati poco nel caso di scaglie cristalline multistrato. In questo lavoro di tesi abbiamo proposto un nuovo approccio basato sulla spettroscopia Raman che ha permesso di discriminare velocemente lo spessore di scaglie cristalline esfoliate di BP tra i 5 nm e i 100 nm. Inoltre, al fine di raggiungere un controllo migliore nel processo di assottigliamento laser, abbiamo anche investigato gli effetti dovuti al substrato sul riscaldamento e ablazione laser in scaglie multistrato di BP. Esperimenti di termometria Raman e calcoli numerici sul problema della diffusione del calore hanno chiarito che effetti ottici, termici e meccanici causati dalla presenza del substrato possono agire differentemente sul riscaldamento e sull’ablazione laser a seconda dello spessore delle scaglie cristalline.
Il percorso di integrazione in dispositivo per la fase 2D β -P, invece, è ancora assente a causa delle richieste più stringenti nella sintesi, basata su tecniche epitassiali, e dei problemi di instabilità fuori dall’ambiente di crescita in UHV. Questi ostacoli sono comunemente condivisi con gli altri membri della famiglia degli Xeni 2D e, in questo lavoro, sono stati studiati considerando il caso di β -P cresciuto epitassialmente su substrati di Au(111)/mica. I dettagli della sua struttura atomica e la reattività chimica all’esposizione in-situ ed ex-situ all’ossigeno sono stati analizzati con l’aiuto della microscopia a scansione ad effetto tunnel (STM) e spettroscopia fotoelettronica a raggi X (XPS). I problemi di instabilità in aria sono stati affrontati sviluppando una opportuna strategia di incapsulamento basata sulla crescita in-situ di un film protettivo di Al2O3 che, a sua volta, ha permesso di maneggiare il fosforo epitassiale lungo i primi passi di un processo di integrazione in dispositivo. Da questo punto di vista, sono stati esaminati due nuovi approcci per il trasferimento di un materiale epitassiale da un substrato di crescita verso substrati target. Ambedue questi metodi di trasferimento possono essere adeguatamente generalizzati all’intera classe degli Xeni epitassiali 2D cresciuti su metallo/mica. In particolare, l’universalità di questi approcci è stata impiegata per la fabbricazione di dispositivi FET e MIM sia su membrane di Al2O3/silicene multistrato/Ag(111) che su Al2O3/fosforo epitassiale/Au(111).<br>Phosphorus and silicon two-dimensional (2D) allotropes have been the forerunners among the post-graphene monoelemental 2D materials. The scientific and technological advantages of these materials require the development of processing methods to guarantee their effective integration in new devices for nanoelectronics. In the present thesis work, some of the unresolved bottlenecks along the device integration path of 2D elemental phosphorus allotropes have been examined considering specifically the case of the α-P (single-layer black phosphorus or phosphorene) and β-P (blue phosphorene) 2D polymorphs.
The integration of the 2D α-P phase in devices has been the subject of extensive investigations and nowadays relies on an almost consolidated path that has led to applications spanning a wide range of fields. One of the few remaining obstacles on this path is the lack of a scalable method to produce 2D α-P layers on large areas and with accurate control of the thickness. In particular, such control is difficult to achieve in the exfoliation of layered black phosphorus (BP) crystals. In this respect, micro-Raman spectroscopy has been used both as a metrological tool to determine the thickness of the exfoliated flakes and as method to achieve their controllable thickness reduction employing the laser thinning technique. However, thickness determination methods based on the calibration of the intensity of the Raman bands have been poorly investigated in the case of multilayer BP flakes due to difficulties caused by optical interferences and anisotropy effects. In this thesis work, we have proposed a novel Raman spectroscopy approach that, carefully accounting for these effects, allowed the quick discrimination of the thickness of exfoliated BP flakes between 5 nm and 100 nm. Moreover, in order to achieve a better control of the laser thinning process down to the ultimate 2D limit, we have also investigated the effects of the substrate on the laser heating and ablation of multilayer BP flakes. Raman thermometry experiments and numerical calculations of the heat diffusion problem have elucidated that optical, thermal, and mechanical effects caused by the substrate may act differently on the laser heating and ablation of the flakes depending on their thickness.
An effective device integration route for the 2D β-P phase, instead, is still missing due to more stringent requirements in its synthesis, based on epitaxial techniques, and to the instability issue outside the UHV growth environment. These obstacles are commonly shared with other members of the family of 2D epitaxial Xenes and, in this work, have been investigated considering the case of β-P epitaxially grown on Au(111)/mica substrates. The details of its atomic structure and the chemical reactivity to ex-situ and in-situ oxygen exposure have been analyzed with the aid of Scanning Tunneling Microscopy (STM) and X-Ray Photoelectron Spectroscopy (XPS). The air-instability issues have been tackled by developing a suitable encapsulation strategy based on the in-situ growth of an Al2O3 capping layer that, in turn, allowed the handling of epitaxial phosphorus along the preliminary steps of a device integration process. In this respect, two novel approaches for the transfer of the epitaxial membrane from the growth substrate towards target substrates have been surveyed. Both the transfer methods can be suitably generalized to the whole class of 2D epitaxial Xenes grown on metal/mica paving the way for the establishment of methodological standards for their manipulation. In particular, the universality of such approaches has been exploited for the successful fabrication of back-gated FET and MIM devices on Al2O3/multilayer silicene/Ag(111) and Al2O3/epitaxial phosphorus/Au(111) mica-delaminated membranes, respectively. The epitaxial phosphorus MIM devices may open intriguing perspectives in the study of the non-volatile resistive switching in monoelemental epitaxial 2D materials.
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Gupta, Sanjay M. Eng Massachusetts Institute of Technology. "Key supply chain integration factors for success of medical device startups." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/117921.
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Thesis: M. Eng. in Supply Chain Management, Massachusetts Institute of Technology, Supply Chain Management Program, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 60-62).<br>Healthcare cost are on the rise and becoming a major concern in the US economy. In fact, healthcare spending is the largest individual contributor to US gross domestic product. Various stakeholders such as government, insurance and payors are now looking at the healthcare providers and manufacturers to come up with innovative and cost-effective solutions. Medical device manufacturers rely heavily on startups to provide new technology solutions to market. Yet, survival rate of these startups is very low. Various factors contribute to the success of these startups such as: market scope, financial support, supply chain integration, patent protection, regulatory compliance, founders experience and more. This thesis investigates supply chain integration factors contributing to the success of medical device startups. Sixteen key supply chain integration factors were identified using systematic literature review and interview research methodology. A survey was conducted to a range of industry participants to validate these factors. Survey responses were then analyzed and validated using statistical application SAS JIMP. Most of the factors stem from regulatory requirements as laid down by U.S. Food and Drug Administration. Out of sixteen factors, Quality management system, good manufacturing practice and collaboration with suppliers and distributors were identified as most critical to the success of medical device startups. These supply chain integration factors were further categorized under three major categories namely compliance, cost and collaboration. A medical device startup need to manage simultaneously all supply chain integration factors under these three categories. The findings of the research would be useful to medical device startups to bring lifesaving innovative solutions in market and contribute to success of these startups.<br>by Sanjay Gupta.<br>M. Eng. in Supply Chain Management
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Dayeh, Shadi A. "Semiconductor nanowires for future electronics growth, characterization, device fabrication, and integration /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p3316154.
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Thesis (Ph. D.)--University of California, San Diego, 2008.<br>Title from first page of PDF file (viewed September 4, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
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Samandari, Rohan. "Integration of Bluetooth Sensors in a Windows-Based Research Platform." Thesis, Malmö universitet, Institutionen för datavetenskap och medieteknik (DVMT), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-43037.
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This thesis describes how to build a solution for transmitting data from an Electroencephalography (EEG) device to a server in real-time while guiding the user through a number of predefined exercises. This solution will be used by Spinal Cord Injury (SCI) patients suffering from neuropathic pain, in order to understand if it is possible to predict such pain from EEG. The collected data will help clinicians analyze the brain activity data from patients who can submit the data from their home. To accomplish this development task, an application was built that connects to a portable EEG device, gather brain activity data from patients, guides patients through a set of imaginary tasks and sends the data to a server. This project made use of a Software Development Kit (SDK) for the Python programming language and a web sockets server written in JavaScript. The application was tested both in terms of usability and end-to-end latency, showing high usability and low latency. The proposed solution will support a clinical trial in Spain with 40 SCI patients.
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Ahderom, Selam T. "Opto-VLSI based WDM multifunction device." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2004. https://ro.ecu.edu.au/theses/772.
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The tremendous expansion of telecommunication services in the past decade, in part due to the growth of the Internet, has made the development of high-bandwidth optical net-works a focus of research interest. The implementation of Dense-Wavelength Division Multiplexing (DWDM) optical fiber transmission systems has the potential to meet this demand. However, crucial components of DWDM networks – add/drop multiplexers, filters, gain equalizers as well as interconnects between optical channels – are currently not implemented as dynamically reconfigurable devices. Electronic cross-connects, the traditional solution to the reconfigurable optical networks, are increasingly not feasible due to the rapidly increasing bandwidth of the optical channels. Thus, optically transparent, dynamically reconfigurable DWDM components are important for alleviating the bottleneck in telecommunication systems of the future. In this study, we develop a promising class of Opto-VLSI based devices, including a dynamic multi-function WDM processor, combining the functions of optical filter, channel equalizer and add-drop multiplexer, as well as a reconfigurable optical power splitter. We review the technological options for all optical WDM components and compare their advantages and disadvantages. We develop a model for designing Opto-VLSI based WDM devices, and demonstrate experimentally the Opto-VLSI multi-function WDM device. Finally, we discuss the feasibility of Opto-VLSI WDM components in meeting the stringent requirements of the optical communications industry.
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Haralson, Erik. "Device design and process integration for SiGeC and Si/SOI bipolar transistors." Doctoral thesis, KTH, Microelectronics and Information Technology, IMIT, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3836.
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<p>SiGe is a significant enabling technology for therealization of integrated circuits used in high performanceoptical networks and radio frequency applications. In order tocontinue to fulfill the demands for these applications, newmaterials and device structures are needed. This thesis focuseson new materials and their integration into heterojunctionbipolar transistor (HBT) structures as well as using devicesimulations to optimize and better understand the deviceoperation. Specifically, a SiGeC HBT platform was designed,fabricated, and electrically characterized. The platformfeatures a non-selectively grown epitaxial SiGeC base,<i>in situ</i>doped polysilicon emitter, nickel silicide,LOCOS isolation, and a minimum emitter width of 0.4 μm.Alternately, a selective epitaxy growth in an oxide window wasused to form the collector and isolation regions. Thetransistors exhibited cutoff frequency (f<sub>T</sub>) and maximum frequency of oscillation (f<sub>MAX</sub>) of 40-80 GHz and 15-45 GHz, respectively.Lateral design rules allowed the investigation of behavior suchas transient enhanced diffusion, leakage current, and theinfluence of parasitics such as base resistance and C<sub>BC</sub>. The formation of nickel silicide on polysiliconSiGe and SiGeC films was also investigated. The formation ofthe low resistivity monosilicide phase was shown to occur athigher temperatures on SiGeC than on SiGe. The stability of themonosilicide was also shown to improve for SiGeC. Nickelsilicide was then integrated into a SiGeC HBT featuring aselectively grown collector. A novel, fully silicided extrinsicbase contact was demonstrated along with the simultaneousformation of NiSi on the<i>in situ</i>doped polysilicon emitter.</p><p>High-resolution x-ray diffraction (HRXRD) was used toinvestigate the growth and stability of SiGeC base layers forHBT integration. HRXRD proved to be an effective, fast,non-destructive tool for monitoring carbon out-diffusion due tothe dopant activation anneal for different temperatures as wellas for inline process monitoring of epitaxial growth of SiGeClayers. The stability of the SiGe layer with 0.2-0.4 at% carbonwhen subjected to dopant activation anneals ranging from1020-1100°C was analyzed by reciprocal lattice mapping.It was found that as the substitutional carbon increases theformation of boron clusters due to diffusion is suppressed, buta higher density of carbon clusters is formed.</p><p>Device simulations were performed to optimize the DC and HFperformance of an advanced SiGeC HBT structure with low baseresistance and small dimension emitter widths. The selectivelyimplanted collector (SIC) was studied using a design ofexperiments (DOE) method. For small dimensions the lateralimplantation straggle has a significant influence on the SICprofile (width). A significant influence of the SIC width onthe DC gain was observed. The optimized structure showedbalanced f<sub>T</sub>/f<sub>MAX</sub>values of 200+ GHz. Finally, SOI BJT transistorswith deep trench isolation were fabricated in a 0.25μmBiCMOS process and self-heating effects were characterized andcompared to transistors on bulk silicon featuring deep trenchand shallow trench isolation. Device simulations based on SEMcross-sections and SIMS data were performed and the resultscompared to the fabricated transistors.</p><p><b>Key words:</b>Silicon-Germanium(SiGe), SiGeC,heterojunction bipolar transistor(HBT), nickel silicide,selectively implanted collector(SIC), device simulation, SiGeClayer stability, high resolution x-ray diffraction(HRXRD),silicon-on-insulator(SOI), self-heating.</p>
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De, Silva Shehan. "Integration of CNT bio potential sensors based on a SAW backscatter device." Thesis, University of Surrey, 2008. http://epubs.surrey.ac.uk/842761/.
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This thesis introduces the concept of using carbon nanotubes (CNT) as a novel bio-sensor and demonstrates the feasibility of incorporating these sensing elements with a Surface Acoustic Wave (SAW) device to enhance the functionality for bio-sensing applications. SAW devices have an inherently high quality factor "Q" and frequency selection properties that complement the state-of- the-art Multi Wall CNT sensors used for this application. The coupling of these two novel technologies provides an ideal platform for continuing to develop a fully integrated bio-sensor using R.F backscatter interrogation. Preliminary analysis provides us with MWCNT integrated by the way of a LC modulator to SAW devices which operate wirelessly and passively at a frequency of 2.63SGHz, where the CNT based dry electrode sensors perform with enhanced performance on porcine skin. The CNT's were precisely grown on Ni catalyst with diameters of c.a. 40nm at a rate of 260nm/min. This ensures the CNTs could punch through the dead skin layer and probe the bio-potentials as demonstrated in solution and porcine skin. The demonstration of the graphene boundary spacing of -3.38A obtained by HR-TEM and the ripples due to the boundaries at ~290-300eV as indicated by EELS confirm multiwall growth of the CNTs. The use of MWCNT based arrays for sensing facilitates the use of said sensors without the need for a Sodium Chloride based gel. The sensitivity of the MWCNT to ionic charge exchange, as expected in the human system, was enhanced by the application of an AgCl layer to the CNT. Elemental analysis of the surface of the sensors by use of EDX indicated transition peaks associated with Ag and Cl. EELS complemented the results indicating the M4 and M5 excitation edges for Ag and 2s level excitation peaks for Cl. Chemical analysis by XPS indicated AgCl formation by the binding energy peaks of the elements correlating to AgCl. The comparative studies carried out with commercial ECG/EEG sensors indicate excellent response and remains stable through the bio-potential detection frequency range of 20 - 80Hz. Thus, the work extends the current knowledge in deployable high sensitivity passive CNT nano sensors transfixed to a SAW structure, which will enable wireless connectivity. The SAW structure enabled a sensing platform merged with a unique ID capability utilising the inherent 3dB power split seen in IDT structures on a piezoelectiic substrate, which was varied using time domain VNA measurements. Medical applications in the form of ECG and EEG sensing have been the core focus of the apparatus, which can be extended for any bio-sensing need such as EMG. The sensors have a sensitivity range defined by a simple LC circuit, and thus can be extended to EEG or any other CNT based bio-sensing paradigm. The technology promises exceptional size reductions in comparison with current cutting edge wireless ECG and EEG sensors. This is accomplished by the use of an inductor, diode, SAW device, sensor and antenna in a tightly coupled passive system. Further attractions of the technology presented include the redundancy of servicing and low cost of mass production. On the negative side, the current cautionary advice issued by the HSE on the use of CNTs will need to be addressed.
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Abdo, Mohamed. "Supply chain integration and barcoding : A case study in Medical Device market." Thesis, KTH, Tillämpad maskinteknik (KTH Södertälje), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-211457.
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Jin, Michael Sungchun. "Heterogeneous integration technology for hybrid optoelectronic and electronic device and module fabrication /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9912846.
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Zhang, Qiongdi. "Integration of a polarizable interface for electrophoretic separation in a microfluidic device." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS577/document.
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L’électrophorèse est une technique puissante permettant de séparer des biomarqueurs présents dans les liquides biologiques.L’électrophorèse de zone libre transporte des molécules en milieu liquide sous l’influence de deux contributions : le flux électrophorétique et le flux électroosmotique (EOF). C’est ce dernier flux EOF qui permet d’optimiser la résolution analytique de la séparation et donc de simplifier le mélange avant sa détection. Notre équipe a développé un contrôle en temps réel de l’ EOF en intégrant une interface polarisable diélectrique dans un dispositif microfluidique. Le carbone amorphe azoté (CNx avec x=15%) a été choisi comme ce matériau.Comme le CNx ne peut pas être déposé directement sur un substrat de verre à cause de sa faible adhérence, deux matériaux différents ont été proposés comme couche d’accroche : le carbure de silicium (SiC) et le platine (Pt). Nous avons tout d’abord optimisé l’adhésion entre le film CNx et la couche d’accroche SiC par différentes procédures de fabrication. Cependant, en raison d’une faible adhérence, le film CNx s’est rapidement décollé en électrolyte liquide. Par contre, nous avons prouvé que certaines architectures hybrides incluant du Pt dans la couche d’accroche sont incroyablement robustes. Même après deux mois dans une solution millimolaire de KCl, le CNx adhérait toujours au verre sans aucune trace de délamination. Ce dispositif a fourni aussi une grande fenêtre de polarisabilité (de -1V à +1V). Nous avons enfin développé une architecture hybride « couche d’accroche isolée/couche électriquement polarisable/électrodes de grille enterrées/ polymère » afin d’éviter toute perte faradique dans l’électrolyte liquide ou vers les circuits conducteurs du dispositif. A l’issue de ces travaux, nous pensons être en mesure de proposer un composant fluidique complexe et robuste qui permet une modulation en temps réel de l’ EOF lors de migrations électrophorétiques<br>Electrophoresis is currently an efficient way to separate precious biomarkers from complex mixtures. It takes place to transport molecules under two contributions: the electrophoretic flow and the electroosmotic flow (EOF). The latter allows to optimize the analytical resolution of the separation.Our team has developed a real-time dynamic control of the EOF by integrating a dielectric polarizable interface in the microfluidic device.Amorphous carbon nitride (CNx with x=15%) has dielectric properties and was chosen to be the polarizable interface. Since it cannot be deposited directly onto glass substrate, we have proposed and studied two different materials as the sticking underlayer: silicon carbide (SiC) and platinum (Pt).In the case of SiC, we have optimized the adhesion between CNx film and SiC underlayer through different fabrication procedures.However, due to poor adhesion, CNx film delaminated into liquid electrolyte quickly.Compared to SiC, Pt is a good sticking underlayerfor CNx. It was found out that even after two months in KCl solution, CNx still stuck robustly toPt. Meanwhile, the device provided a large windowof polarizability (from -1V to +1V). Finally, toavoid any faradic loss in the liquid electrolyte ortowards the conductive circuitry of the device, we have developed a sticking underlayer/electrically polarizable/polymeric hybrid architecture. This architecture appears to be the most robust existing polarizable interface for strong and long-term adhesion onto glass substrates
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Bagheri, Majdi Elmira. "EVALUATION OF MOBILE DEVICE MANAGEMENT TOOLS AND ANALYSING INTEGRATION MODELS FOR MOBILITY ENTERPRISE." Thesis, Umeå universitet, Institutionen för datavetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-74017.
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The mobile market is growing. More and more business units, (BUs) at the multinational company ABB start considering utilizing mobility to create business value, by offering product/system enhancement and by offering new services. However, at present, there is no standard way to realize this and they struggle with the security challenges for their solution. This thesis work will focus on investigating the Mobile Device Management (MDM) market and analyze how the existing technologies address all security requirements of a mobility solution. The main goal is to investigate how multi criteria methods can be applied to facilitate the choice of the most adequate MDM tool. It needs to provide a secure common architecture and integrate with existing backend infrastructures. The benefits include: (1) enabling the employees to use their own mobile devices in a secure way for working with the enterprise, (2) reliably integrating a backend system for new services in enterprise mobility, and (3) providing a (proven) secure solution to control and manage mobility on MDM technology.
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Hopf, Jens Michael [Verfasser]. "Framework for the Integration of Mobile Device Features in PLM / Jens Michael Hopf." Karlsruhe : KIT Scientific Publishing, 2016. http://www.ksp.kit.edu.
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Ogata, Ken. "Controlled growth and integration of silicon nanowires for electrical and electrochemical device applications." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610260.
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Huang, Weixin. "Economic integration as a development device : the case of the EC and China /." Saarbrücken ; Fort Lauderdale : Breitenbach, 1992. http://catalogue.bnf.fr/ark:/12148/cb37396328c.
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Pan, Chenyun. "A hierarchical optimization engine for nanoelectronic systems using emerging device and interconnect technologies." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53931.
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A fast and efficient hierarchical optimization engine was developed to benchmark and optimize various emerging device and interconnect technologies and system-level innovations at the early design stage. As the semiconductor industry approaches sub-20nm technology nodes, both devices and interconnects are facing severe physical challenges. Many novel device and interconnect concepts and system integration techniques are proposed in the past decade to reinforce or even replace the conventional Si CMOS technology and Cu interconnects. To efficiently benchmark and optimize these emerging technologies, a validated system-level design methodology is developed based on the compact models from all hierarchies, starting from the bottom material-level, to the device- and interconnect-level, and to the top system-level models. Multiple design parameters across all hierarchies are co-optimized simultaneously to maximize the overall chip throughput instead of just the intrinsic delay or energy dissipation of the device or interconnect itself. This optimization is performed under various constraints such as the power dissipation, maximum temperature, die size area, power delivery noise, and yield. For the device benchmarking, novel graphen PN junction devices and InAs nanowire FETs are investigated for both high-performance and low-power applications. For the interconnect benchmarking, a novel local interconnect structure and hybrid Al-Cu interconnect architecture are proposed, and emerging multi-layer graphene interconnects are also investigated, and compared with the conventional Cu interconnects. For the system-level analyses, the benefits of the systems implemented with 3D integration and heterogeneous integration are analyzed. In addition, the impact of the power delivery noise and process variation for both devices and interconnects are quantified on the overall chip throughput.
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Baker, Christensen Leslie Michelle. "Artistic Drawing as a Mnemonic Device." Antioch University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1476188042242805.
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Mahdi, Ali Haider Verfasser], Andreas [Akademischer Betreuer] [Mitschele-Thiel, Jochen [Gutachter] Seitz, and Jens [Gutachter] Mückenheim. "The integration of device-to-device communication in future cellular systems / Ali Haider Mahdi ; Gutachter: Jochen Seitz, Jens Mückenheim ; Betreuer: Andreas Mitschele-Thiel." Ilmenau : TU Ilmenau, 2017. http://d-nb.info/1178142442/34.
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Mahdi, Ali Haider [Verfasser], Andreas [Akademischer Betreuer] Mitschele-Thiel, Jochen [Gutachter] Seitz, and Jens [Gutachter] Mückenheim. "The integration of device-to-device communication in future cellular systems / Ali Haider Mahdi ; Gutachter: Jochen Seitz, Jens Mückenheim ; Betreuer: Andreas Mitschele-Thiel." Ilmenau : TU Ilmenau, 2017. http://d-nb.info/1178142442/34.
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Domènech, Gil Guillem. "Advances in semiconducting nanowires for gas sensing: synthesis, device testing, integration and electronic nose fabrication." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/668365.
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The work presented in this dissertation is focused on the fabrication, integration and test of chemoresistive gas sensor devices and systems based on semiconducting nanowires (NWs).
The first objective of this dissertation was to grow monocrystalline In2O3 and Ga2O3 NWs via the vapor-liquid-solid mechanism using a chemical vapor deposition furnace and solid precursors. Subsequently devices based on individual NWs were fabricated, contacted on top of microhotplates using Focused Electron Beam Induced Deposition (FEBID), and their gas sensing properties were characterized. The gas sensors based on individual In2O3 NWs present considerable response towards ethanol at 300 ºC, with a response time of about 4 minutes. On the other hand, the gas sensors based on individual Ga2O3 NWs showed high selectivity towards relative humidity at room temperature, with resistance variations up to 90% in times as short as 2 minutes, and with minimal response to other gases (NO2, CO, ethanol and H2). This behavior is completely different from that reported on this material and is a direct consequence of the NW growth method, which gives rise to a carbon shell around the NWs. Furthermore, the sensing behavior ressembles that of carbon-containing materials..
A second objective was to deepen into methodologies to integrate the sensing material in the substrates where the gas sensing devices are fabricated, with the aim of simplifying the integration procedures and increasing the throughput. With this in mind, dielectrophoretic alignment of NWs was the first methodology proposed to fabricate chemoresistors based on arrays of individual WO3 NWs. The maximum gas response of the fabricated arrays of individual NWs was towards 5 ppm of NO2 for the pristine and towards 100 ppm of EtOH for the Pt-functionalized WO3 NWs, respectively. This higher response of the Pt-functionalized WO3 NWs-based gas sensors is related to the surface decoration of these NWs, which increases the amount of oxygen adsorbed species at their surface, allowing EtOH molecules to be more easily adsorbed than on pristine NWs. The second approach proposed for contacting individual SnO2 NWs on top of suspended microhotplates was Electron Beam Lithography (EBL) in combination with lift-off. The method allows fabricating several devices sequentially but without breaking the vacuum of the EBL system and required optimization of the holder for spinning and of the electron dose used to modify the photoresist properties. The gas characterization of these devices showed higher resistance variations than that obtained for the reference fabrication technique, FEBID. This superior behavior can be the result of the better electrical characteristics of the Ti/Pt contacts in front of the FEBID Pt-deposition. This demonstrates the potentiality of this techniques for contacting individual NWs on top of micromembranes.
The third objective was, to a certain point, a natural extension of the device integration activity when considering one of the major drawbacks of chemoresistors: their lack of selectivity. For this, SnO2, WO3 and Ge NWs, have been grown on well-defined and pre-specified regions of one single chip, allowing their simultaneous operation. Here, NO2, CO and relative humidity (RH), diluted in dry synthetic air, have been tested. The calibration of each individual sensor has been carried out exposing the whole chip to the individual gases but with only this particular sensor heated and biased, while the others were unheated and unbiased. This has allowed determining the optimal operation conditions for each sensor. Next, at these optimal temperatures, all the sensors have been tested, simultaneously, towards each gas specie alone. Finally, tests of the three sensors, operating simultaneously, towards mixtures of the three gases were performed. The data from all the mentioned measurements have been treated according to the Principal Component Analysis (PCA) methodology and the results demonstrate that the fabricated sensor system can discriminate and quantify the concentration of the three different studied analytes. The three sensors, made of three different materials and operating simultaneously, constitute an electronic nose, which we here call nano electronic nose.<br>Aquesta tesi doctoral està enfocada al desenvolupament de dispositius i sistemes sensors de gas basats en nanofils semiconductors monocristal·lins.
El primer objectiu aconseguit és el creixement de nanofils d’In2O3 i de Ga2O3 utilitzant un forn pel dipòsit químic en fase vapor. Els nanofils fabricats s’han transferit a xips amb micromembranes suspeses amb calefactor i nanofils individuals s’han contactat amb els seus elèctrodes, emprant el dipòsit assistit per feixos d’electrons. Els nanofils d’In2O3 mostren una resposta considerablement selectiva enfront d’etanol a partir dels 200 ºC i els de Ga2O3 són molt selectius a la humitat relativa a temperatura ambient, fruit del mètode de creixement.
Un segon objectiu d’aquesta tesi ha estat explorar dos mètodes d’integració de nanofils individuals: la dielectroforesi, per alinear nanofils de WO3, que han mostrat respostes enfront d’etanol i NO2, a 250 ºC, i la litografia per feixos d’electrons, per contactar nanofils de SnO2 sobre microplataformes calefactores suspeses, que han mostrat respostes satisfactòries enfront d’amoníac a 200 ºC. En ambdós casos s’ha demostrat la viabilitat d’aquestes tècniques.
L’últim objectiu ha estat la fabricació i caracterització d’un nas electrònic basat en xarxes de nanofils de SnO2, WO3 i Ge integrades en cadascuna en una micromembrana d’un mateix xip. Aquests nanofils s’han fet créixer directament en regions localitzades i predefinides del xip, les micromembranes, integrats directament en ell, evitant la necessitat de transferir-los després de fer-los créixer. Primer s’ha realitzat el calibratge de cada sensor individual enfront de tres gasos individualment, després enfront de tres gasos simultàniament i, finalment, els tres sensors s’han fet funcionar alhora enfront dels tres gasos. Les dades de totes les mesures s’han tractat segons la metodologia d’anàlisi de components principals i els resultats demostren que aquest sistema és capaç de discriminar entre diverses mescles de NO2 i CO diluïts en aire sintètic sota diferents nivells d’humitat relativa. Els tres sensors, formats per els tres materials diferents i funcionant simultàniament, constitueixen un nano nas electrònic.
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Pandharpure, Shrinivas. "Process development for integration of CoFeB/MgO-based magnetic tunnel junction (MTJ) device on silicon /." Online version of thesis, 2007. http://hdl.handle.net/1850/5060.
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Li, Kejia. "Custom biomedical sensors for application in wireless body area networks and medical device integration frameworks." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/14632.
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Doctor of Philosophy<br>Department of Electrical & Computer Engineering<br>Steve Warren<br>The U.S. health care system is one of the most advanced and costly systems in the world. The health services supply/demand gap is being enlarged by the aging population coupled with shortages in the traditional health care workforce and new information technology workers. This will not change if the current medical system adheres to the traditional hospital-centered model. One promising solution is to incorporate patient-centered, point-of-care test systems that promote proactive and preventive care by utilizing technology advancements in sensors, devices, communication standards, engineering systems, and information infrastructures.
Biomedical devices optimized for home and mobile health care environments will drive this transition. This dissertation documents research and development focused on biomedical device design for this purpose (including a wearable wireless pulse oximeter, motion sensor, and two-thumb electrocardiograph) and, more importantly, their interactions with other medical components, their supporting information infrastructures, and processing tools that illustrate the effectiveness of their data. The GumPack concept and prototype introduced in Chapter 2 addresses these aspects, as it is a sensor-laden device, a host for a local body area network (BAN), a portal to external integration frameworks, and a data processing platform. GumPack sensor-component design (Chapters 3 and 4) is oriented toward surface applications (e.g., touch and measure), an everyday-carry form factor, and reconfigurability. Onboard tagging technology (Chapters 5 and 6) enhances sensor functionality by providing, e.g., a signal quality index and confidence coefficient for itself and/or next-tier medical components (e.g., a hub).
Sensor interaction and integration work includes applications based on the GumPack design (Chapters 7 through 9) and the Medical Device Coordination Framework (Chapters 10 through 12). A high-resolution, wireless BAN is presented in Chapter 8, followed by a new physiological use case for pulse wave velocity estimation in Chapter 9. The collaborative MDCF work is transitioned to a web-based Hospital Information Integration System (Chapter 11) by employing database, AJAX, and Java Servlet technology. Given the preceding sensor designs and the availability of information infrastructures like the MDCF, medical platform-oriented devices (Chapter 12) could be an innovative and efficient way to design medical devices for hospital and home health care applications.
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Huang, Sa. "GaN-Based and High-Speed Metal-Semiconductor-Metal Photodetector: Growth and Device Structures for Integration." Diss., Available online, Georgia Institute of Technology, 2003:, 2003. http://etd.gatech.edu/theses/available/etd-11242003-173234/unrestricted/huang%5Fsa%5F200312%5Fphd.pdf.
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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2004.<br>Ferguson, Ian T., Committee Member ; Rhodes, William T., Committee Member ; Wang, Zhonglin, Committee Member ; Brown, April S., Committee Chair ; Jokerst, Nan M., Committee Co-Chair ; Doolittle, W. Alan, Committee Member. Vita. Includes bibliographical references.
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Hopf, Jens Michael Verfasser], and Jivka [Akademischer Betreuer] [Ovtcharova. "Framework for the Integration of Mobile Device Features in PLM / Jens Michael Hopf. Betreuer: J. Ovtcharova." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/1103573683/34.
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Pratt, Donald E. Jr, and Brian K. Jones. "MOBILE DEVICE MANAGEMENT IN THE DoD ENTERPRISE NETWORK: FACTORS FOR RISK MANAGEMENT, INTEGRATION, AND IT ACQUISITION." Monterey, California. Naval Postgraduate School, 2013. http://hdl.handle.net/10945/32886.
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The Office of the Department of Defense Chief Information Officer (DoD CIO) has developed a mobile device strategy that will require the DoD information technology (IT) system acquisition process to acquire a mobile device management (MDM) toolset to mitigate information assurance (IA) risks created through the use of mobile devices on the enterprise domain. In an effort to target affordability and control cost growth, IT professionals need to understand how IA concerns are addressed through MDM and how properly scoped solutions can be sourced to reduce project risks related to cost, schedule, and performance for projects that involve obtaining an MDM toolset through the DoD acquisition process. This research develops a mixed method study to understand the concerns of federal information technology professionals who are knowledgeable on MDM and the acquisition professionals who procure the MDM solutions. In this research, the authors provide DoD professionals with a framework to select optimal MDM solutions through the identification of baseline requirements in order to operate effectively in a resource constrained environment.
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Hopf, Jens Michael [Verfasser], and Jivka [Akademischer Betreuer] Ovtcharova. "Framework for the Integration of Mobile Device Features in PLM / Jens Michael Hopf. Betreuer: J. Ovtcharova." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/1103573683/34.
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Datar, Prashant P. "System integration and testing using object oriented programming based control." [Tampa, Fla.] : University of South Florida, 2002. http://purl.fcla.edu/fcla/etd/SFE0000595.
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Hamada, Ahmad. "The Integration History of Kuwaiti Television from 1957-1990: An Audience-Generated Oral Narrative on the Arrival and Integration of the Device in the City." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/4066.
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This study attempts to compose an account of television history in Kuwait, one that focuses on its integration into society and is told from the audience's perspective and experience. This study represents a cultural alternative to the overwhelmingly national, institutional, and biographical focus that accompanies television history works in Kuwait and the Arab world.
The narrative is gathered and generated through the individual oral stories of 25 Kuwaitis over the age of 50, who generally represent the six geographical districts of Kuwait. Through their oral stories, the narrators examine the different areas in which television has integrated itself into society from 1957 to 1990. These include television’s succession to cinema, television’s novelty, television’s familiarization into society, television’s domestication, television’s interaction with modernity, and television’s content.
The oral stories of the narrators regarding each area reveal a wide range of microscopic topics about living in early Kuwait and television’s integration with it, including the people’s initial “miraculous” conception of the device, television’s relation with Kuwaiti urban growth, and the early economical gap of television ownership in Kuwait.
Besides the general exploration, discussing the research areas indicates a somewhat linear narrative of television’s integration into culture, where television was preceded by the cinema technology that had semiotically paved the way for the device, before an abrupt novelty period in which television was settling in an ever-changing Kuwait, followed by a familiarity period in which the device had lost its gimmicky association, interrelated with all the other sociocultural factors of society, and spatially corresponded with both the extinct and the surviving components of the Kuwaiti house. Kuwaiti television had also corresponded with the social, economical, and urban alterations of Kuwaiti modernity, with its content nostalgically reflecting different stages of Kuwaiti cultural life. In the end, an overarching theme could be found in the “foreshortening” of television’s integration journey into Kuwaiti culture, with the narrators using television to express their yearning to the values of yesteryear.
Future studies suggest more focus on contextuality, qualitative data, and interdisciplinarity in television history.
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Chung, Sung-Yong. "Si/SiGe heterostructures materials, physics, quantum functional devices and their integration with heterostructure bipolar transistors /." Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1132244278.
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Prasad, Rohit. "Device integration of the CoBiSS spectrometer and modelisation of (L)SPR chip for the detection through CoBiSS." Thesis, Troyes, 2017. http://www.theses.fr/2017TROY0031.
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Aujourd’hui l’Internet des Objets (IdO) est en pleine évolution, et le dispositif de détection optique tel que présenté ici pourrait être utilisé dans ce domaine. En effet ces dispositifs pourraient être utilisé pour faire des tests pour une analyse comme la surveillance de la santé d'une personne en faisant un test sanguin ou d'autres analyses médicales et utilisés pour surveiller l'environnement en testant l'eau ou de l'air dans les villes, les montagnes, les usines, les rivières. Pour créer le dispositif, on a utilisé une combinaison du spectromètre nommé Spectromètre d'échantillonnage bi-directionnel couplé (CoBiSS) [Brevet WO2009127794A1] et une puce à résonance de Plasmon de Surface (SPR).Dans le but de l’intégration optique, une nouvelle analyse de l’échantillonnage dans le spectromètre CoBiSS est présentée, suivie de l'intégration du système électronique et optique pour supprimer les pièces mobiles. Il était nécessaire de rendre l'appareil petit et portable. Pour faciliter l'utilisation, une interface graphique a été développée. Pour la détection, une puce SPR a été ajouté à CoBiSS et une nouvelle puce à résonance de plasmon de surface localisée (LSPR) a été modélisé pour maximiser sa sensibilité. Une nouvelle définition du calcul de sensibilité a été proposée.Cet appareil nécessite l'ajout de fonctionnalisation sur (L)SPR Chip pour la détection et une application finale. Cet appareil pourrait être un « objet » idéale dans l’IdO<br>As the world is moving towards Internet of Things, an optical detection device is presented that can be utilized in this domain. This device can be used to do tests that use optical detection for analysis like monitoring of Health of a person by doing a blood test or other medical analysis and also be used to monitor environment by testing water or air in cities, mountains, factories, rivers and so on for a practical purpose. To create this optical detection device, a combination of spectrometer named Coupled Bi-Directional Sampling Spectrometer (CoBiSS) [Patent number WO2009127794A1] and Surface Plasmon Resonance (SPR) Chip has been used. For the optical integration, a new analysis of the sampling in the spectrometer CoBiSS is presented. Followed by, Device and Optical Integration of CoBiSS has been done to remove all the moving parts. It was necessary to make the device small that can be handheld and portable. For ease of use a Graphical User interface was developed. For detection, CoBiSS was added with a chip of SPR. A modelisation of SPR chip was done to maximize its sensitivity. A new Localized Surface Plasmon Resonance (LSPR) chip has been proposed to work with CoBiSS. Optimization of LSPR chip has been performed to maximize the sensitivity. A new definition for the calculation of Sensitivity has been proposed. This device needs the addition of functionalization on (L)SPR Chip for detection and a final application. This device could be an ideal “Thing” in Internet of Things
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Simmers, Phillip Charles. "Prolonged Biofluid Access by Iontophoretic Delivery of Slowly Metabolized Cholinergic Agents and Integration into a Wearable Device." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535634635926094.
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Chen, Zheng. "Electrical Integration of SiC Power Devices for High-Power-Density Applications." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23923.
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The trend of electrification in transportation applications has led to the fast development of high-power-density power electronics converters. High-switching-frequency and high-temperature operations are the two key factors towards this target. Both requirements, however, are challenging the fundamental limit of silicon (Si) based devices. The emerging wide-bandgap, silicon carbide (SiC) power devices have become the promising solution to meet these requirements. With these advanced devices, the technology barrier has now moved to the compatible integration technology that can make the best of device capabilities in high-power-density converters. Many challenges are present, and some of the most important issues are explored in this dissertation.
First of all, the high-temperature performances of the commercial SiC MOSFET are evaluated extensively up to 200 degree C. The static and switching characterizations show that the device has superior electrical performances under elevated temperatures. Meanwhile, the gate oxide stability of the device - a known issue to SiC MOSFETs in general - is also evaluated through both high-temperature gate biasing and gate switching tests. Device degradations are observed from these tests, and a design trade-off between the performance and reliability of the SiC MOSFET is concluded.
To understand the interactions between devices and circuit parasitics, an experimental parametric study is performed to investigate the influences of stray inductances on the MOSFETs switching waveforms. A small-signal model is then developed to explain the parasitic ringing in the frequency domain. From this angle, the ringing mechanism can be understood more easily and deeply. With the use of this model, the effects of DC decoupling capacitors in suppressing the ringing can be further explained in a more straightforward way than the traditional time-domain analysis. A rule of thumb regarding the capacitance selection is also derived.
A Power Electronics Building Block (PEBB) module is then developed with discrete SiC MOSFETs. Integrating the power stage together with the peripheral functions such as gate drive and protection, the PEBB concept allows the converter to be built quickly and reliably by simply connecting several PEBB modules. The high-speed gate drive and power stage layout designs are presented to enable fast and safe switching of the SiC MOSFET. Based on the PEBB platform, the state-of-the-art Si and SiC power MOSFETs are also compared in the device characteristics, temperature influences, and loss distributions in a high-frequency converter, so that special design considerations can be concluded for the SiC MOSFET.
Towards high-temperature, high-frequency and high-power operations, integrated wire-bond phase-leg modules are also developed with SiC MOSFET bare dice. High-temperature packaging materials are carefully selected based on an extensive literature survey. The design considerations of improved substrate layout, laminated bus bars, and embedded decoupling capacitors are all discussed in detail, and are verified through a modeling and simulation approach in the design stage. The 200 degree C, 100 kHz continuous operation is demonstrated on the fabricated module. Through the comparison with a commercial SiC phase-leg module designed in the traditional way, it is also shown that the design considerations proposed in this work allow the SiC devices in the wire-bond structure to be switched twice as fast with only one-third of the parasitic ringing.
To further push the performance of SiC power modules, a novel hybrid packaging technology is developed which combines the small parasitics and footprint of a planar module with the easy fabrication of a wire-bond module. The original concept is demonstrated on a high-temperature rectifier module with SiC JFET. A modified structure is then proposed to further improve design flexibility and simplify module fabrication. The SiC MOSFET phase-leg module built in this structure successfully reaches the switching speed limit of the device almost without any parasitic ringing.
Finally, a new switching loop snubber circuit is proposed to damp the parasitic ringing through magnetic coupling without affecting either conduction or switching losses of the device. The concept is analyzed theoretically and verified experimentally. The initial integration of such a circuit into the power module is presented, and possible improvements are proposed.<br>Ph. D.
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Campion, Russel John. "TRIuMPh : a multimedia design method for task requirement formulation, media integration, device combination, and practical implementation design issues." Thesis, Staffordshire University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267313.
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Martinez-Gonzalez, Pablo. "A study on the integration of a high-speed flywheel as an energy storage device in hybrid vehicles." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6082.
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The last couple of decades have seen the rise of the hybrid electric vehicle as a compromise between the outstanding specific energy of petrol fuels and its low-cost technology, and the zero tail-gate emissions of the electric vehicle. Despite this, considerable reductions in cost and further increases in fuel economy are needed for their widespread adoption. An alternative low-cost energy storage technology for vehicles is the high-speed flywheel. The flywheel has important limitations that exclude it from being used as a primary energy source for vehicles, but its power characteristics and low-cost materials make it a powerful complement to a vehicle's primary propulsion system. This thesis presents an analysis on the integration of a high-speed flywheel for use as a secondary energy storage device in hybrid vehicles. Unlike other energy storage technologies, the energy content of the flywheel has a direct impact on the velocity of transmission. This presents an important challenge, as it means that the flywheel must be able to rotate at a speed independent of the vehicle's velocity and therefore it must be coupled via a variable speed transmission. This thesis presents some practical ways in which to accomplish this in conventional road vehicles, namely with the use of a variator, a planetary gear set or with the use of a power-split continuously variable transmission. Fundamental analyses on the kinematic behaviour of these transmissions particularly as they pertain to flywheel powertrains are presented. Computer simulations were carried out to compare the performance of various transmissions, and the models developed are presented as well. Finally the thesis also contains an investigation on the driving and road conditions that have the most beneficial effect on hybrid vehicle performance, with a particular emphasis on the effect that the road topography has on fuel economy and the significance of this.
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Mahjoub, Youssif. "Development and Integration of a Low-Cost Occupancy Monitoring System." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1404589/.
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The world is getting busier and more crowded each year. Due to this fact resources such as public transport, available energy, and usable space are becoming congested and require vast amounts of logistical support. As of February 2018, nearly 95% of Americans own a mobile cell phone according to the Pew Research Center. These devices are consistently broadcasting their presents to other devices. By leveraging this data to provide occupational awareness of high traffic areas such as public transit stops, buildings, etc logistic efforts can be streamline to best suit the dynamics of the population. With the rise of The Internet of Things, a scalable low-cost occupancy monitoring system can be deployed to collect this broadcasted data and present it to logistics in real time. Simple IoT devices such as the Raspberry Pi, wireless cards capable of passive monitoring, and the utilization of specialized software can provide this capability. Additionally, this combination of hardware and software can be integrated in a way to be as simple as a typical plug and play set up making system deployment quick and easy. This effort details the development and integration work done to deliver a working product acting as a foundation to build upon. Machine learning algorithms such as k-Nearest-Neighbors were also developed to estimate a mobile device's approximate location inside a building.
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Symer, Maryellen. "One-to-One Technology Device Integration in Grades 3-5 and the Beliefs & Actions of Teachers and District-Level Leaders." Thesis, Sage Graduate School, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10981820.
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<p> One-to-One Technology Device Integration in Grades 3-5 and the Beliefs & Actions of Teachers and District-Level Leaders One-to-One technology initiatives began in the 1990’s and have expanded over time. It is not about distributing devices but rather how those devices transform teaching and learning. Educators need to harness the power of technology devices to engage students in learning, enhance teaching, and provide opportunities for personalized learning. The International Society for Technology in Education (ISTE) has developed student standards that provide a framework for teachers to guide them in developing content-rich lessons that are supported and enhanced by the use of technology devices. </p><p> The purpose of this study was to examine how teachers in grades three through five operationalize the seven ISTE student standards in schools with one-to-one technology devices. The types of projects designed and implemented with students, as well as the actions taken by leaders to provide systems of instructional technology support, professional development opportunities and systems for learning for teachers was explored. Data was collected through interviews with third through fifth grade teachers and leaders in two districts that have implemented one-to-one student technology devices in their schools. </p><p> A qualitative design was used and data was collected from interviews with twelve leaders, six teachers and a technology integration specialist from two school districts in the Capital Region of New York State that had implemented one-to-one initiatives in their districts. The data was analyzed to develop findings to answer three research questions. The findings of this study indicate that educational leaders who have implemented one-to one student technology in their district recognize that it is not about the device but more about the learning. Teachers reported that one-to-one student technology devices do not replace quality instruction but rather see the devices as a tool to increase motivation and engagement. A formal assessment to gather data to determine the effectiveness of implementing one-to-one student technology devices is needed. </p><p> Conclusions from this study indicate that one-to-one student technology provide the opportunity for teachers to engage students in learning, differentiate and personalize learning, and allow students to be creators of their own learning. This study indicates that when implementing a one-to-one initiative, leaders who provide time for professional development through the creation of social networks of learning and technical support for student technology devices foster the successful implementation of a one-to-one initiative. Recommendations include supporting professional development on the ISTE standards, designing schedules that provide common time for teachers to learn about technology integration, requiring the inclusion of professional development for technology integration in district professional development plans and teacher and leader certification programs, and future studies. </p><p>
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Phung, Thi Thuy Nga [Verfasser], Dieter [Akademischer Betreuer] Neher, Antonio [Akademischer Betreuer] Abate, and Iván [Akademischer Betreuer] Mora-Seró. "Defect chemistry in halide perovskites : material characterisation and device integration / Thi Thuy Nga Phung ; Dieter Neher, Antonio Abate, Iván Mora-Seró." Potsdam : Universität Potsdam, 2020. http://d-nb.info/1219911461/34.
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Schuster, Daniel, Thomas Springer, Benjamin Söllner, Dirk Hering, and Alexander Schill. "MobilisBuddy - Integration sozialer Netzwerke in distanzabhängige Dienste auf mobilen Endgeräten." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-141759.
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Schuster, Daniel, Thomas Springer, Benjamin Söllner, Dirk Hering, and Alexander Schill. "MobilisBuddy - Integration sozialer Netzwerke in distanzabhängige Dienste auf mobilen Endgeräten." Technische Universität Dresden, 2009. https://tud.qucosa.de/id/qucosa%3A27985.
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Michel, David Daniel. "Linear-cavity tunable fibre lasers employing an Opto-VLSI processor and a MEMS-based device." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2012. https://ro.ecu.edu.au/theses/520.
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This thesis proposes and demonstrates experimentally two novel linear-cavity tunable fibre lasers employing an erbium-doped fibre (EDF) in conjunction with an Opto- VLSI processor and a MEMS-based device for wavelength selection. The Opto-VLSI processor and the MEMS-based device along with an optical collimator, a Bragg grating plate and an optical lens, enable the realisation of an optical filter for continuous tuning of wavelengths over the amplified spontaneous emission (ASE) range of the EDF. We also propose the use of a section of un-pumped EDF as a saturable absorber (SA), which suppresses noise spikes caused by the high optical pumping power. Experimental results show that by optimising a length of the SA a single wavelength, high power laser signal can be achieved. In addition, we experimentally demonstrate that the performance of the proposed linear-cavity tunable fibre lasers is better than that of ring-cavity tunable laser counterparts. Specifically, we show that linear-cavity based tunable fibre lasers can achieve higher output power, a larger side mode rejection ratio (SMRR) and narrower laser linewidth than ring-cavity tunable fibre lasers.
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Kripalani, Rishi A. "Novel Integration of Conductive-ink Circuitry with a Paper-based Microfluidic Battery as an All-printed Sensing Platform." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1694.
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The addition of powered components for active assays into paper-based analytical devices opens new opportunities for medical and environmental analysis in resource-limited applications. Current battery designs within such devices have yet to adopt a ubiquitous circuitry material, necessitating investigation into printed circuitry for scalable platforms. In this study, a microfluidic battery was mated with silver-nanoparticle conductive ink to prototype an all-printed sensing platform. A multi-layer, two-cell device was fabricated, generating 200 μA of direct electrical current at 2.5 V sustained for 16 minutes with a power loss of less than 0.1% through the printed circuitry. Printed circuitry traces exhibited resistivity of 75 to 211 10-5 Ω m. Resistance of the printed traces increased upwards of 200% depending on fold angle and directionality. X-ray diffraction confirmed the presence of face-centered cubic silver after sintering printed traces for 30 minutes at 150°C in air. A conductivity threshold was mapped and an ink concentration of 0.636 μL mm-3 was identified as the lower limit for optimal electrical performance.
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Wikle, Jared Kevin. "Integration of a Complete Detect and Avoid System for Small Unmanned Aircraft Systems." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6361.
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For unmanned aircraft systems to gain full access to the National Airspace System (NAS), they must have the capability to detect and avoid other aircraft. This research focuses on the development of a detect-and-avoid (DAA) system for small unmanned aircraft systems. To safely avoid another aircraft, an unmanned aircraft must detect the intruder aircraft with ample time and distance. Two analytical methods for finding the minimum detection range needed are described. The first method, time-based geometric velocity vectors (TGVV), includes the bank-angle dynamics of the ownship while the second, geometric velocity vectors (GVV), assumes an instantaneous bank-angle maneuver. The solution using the first method must be found numerically, while the second has a closed-form analytical solution. These methods are compared to two existing methods. Results show the time-based geometric velocity vectors approach is precise, and the geometric velocity vectors approach is a good approximation under many conditions. The DAA problem requires the use of a robust target detection and tracking algorithm for tracking multiple maneuvering aircraft in the presence of noisy, cluttered, and missed measurements. Additionally these algorithms needs to be able to detect overtaking intruders, which has been resolved by using multiple radar sensors around the aircraft. To achieve these goals the formulation of a nonlinear extension to R-RANSAC has been performed, known as extended recursive-RANSAC (ER-RANSAC). The primary modifications needed for this ER-RANSAC implementation include the use of an EKF, nonlinear inlier functions, and the Gauss-Newton method for model hypothesis and generation. A fully functional DAA system includes target detection and tracking, collision detection, and collision avoidance. In this research we demonstrate the integration of each of the DAA-system subcomponents into fully functional simulation and hardware implementations using a ground-based radar setup. This integration resulted in various modifications of the radar DSP, collision detection, and collision avoidance algorithms, to improve the performance of the fully integrated DAA system. Using these subcomponents we present flight results of a complete ground-based radar DAA system, using actual radar hardware.
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Ferdousi, Fahmida. "Device design and process integration of high density nonvolatile memory devices." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-2848.
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This research focuses on device design and process integration of high density nonvolatile memory devices. Research was carried out to improve scaling of floating gate memories by increasing charge density as well as spin-based memories by reducing critical switching current. This work demonstrates fabrication of CMOS-compatible nonvolatile hybrid memory device using fullerene molecules as a floating gate. Molecules have dimensions of several Angstroms resulting in an electron density of ~10¹³ cm⁻² or higher. In hybrid MOSCAPs, fullerenes were encapsulated between inorganic oxides, i.e. SiO₂ as a tunnel oxide and HfO₂ as a control oxide. Introduction of a high-k material as a control oxide improves capacitive coupling between control gate and floating gate as well as the program/erase efficiency. The MOS capacitors demonstrate nonvolatile memory operation at room temperature. The device data infers that program/erase mechanism in fullerene devices is Fowler-Nordheim tunneling; however, retention is determined by trap-assisted tunneling. The next part of the work focused on spin-transfer-torque (STT) based magnetic memory. Spin-based memory has the unique potential to be the universal memory because of its high density, fast switching, and nonvolatility. This work presents STT switching of perpendicular magnetic anisotropy (PMA) spin-valves with tilted magnetization using point contact measurement. The PMA materials have high coercivity resulting in good retention and tilted magnetization induces precessional switching resulting in a lower switching current density. First, micromagnetic simulations were performed for spin-valves with tilted magnetization and precessional switching was observed to reduce the switching current. Then, spin-valve structures were fabricated by e-beam evaporation. The structure consisted of Co/Pt and Co/Ni layers, where the thickness of the layers was optimized to obtain different amount of tilt in magnetization. Point contact measurements of tilted spin-valves show STT switching, where the switching field of the free layer varies with the magnitude and sign of the applied current. The observed STT effect is stronger in a 45° tilted spin-valve compared to a 12° tilted device presumably due to the tilted spin polarization. However, tilting introduces nonuniform effective field and canting of the domains which affect the STT.<br>text
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KUANG-LUN, YEH, and 葉光倫. "Multi-touch Device Integration and its Application Development." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/87298724670610090978.
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碩士<br>明新科技大學<br>電機工程研究所<br>102<br>With the growing popularity of handheld devices in recent years, handheld devices of varying sizes are being introduced to the market. Today, not only is the Smartphone market being viewed by various major manufacturers as a potentially fruitful market, this continuing trend in mobile devices has also led to the development of more and more apps. In the past when various media files were shared among friends, there would inevitably be limitations due to the size of the mobile devices involved. For instance, when a recently taken photo was shared, it would have been difficult to share it to 3 or more people due to the size of the screen. To overcome this limitation, the contents to be shared will usually be passed around, but this will in turn lead to risks of losing or damaging the device. Even now, when the hardware specifications of mobile devices are increasingly advanced with ever-more efficient displays, CPUs, and memory capabilities, limitations remain, as it can still be very inconvenient for someone to carry an oversized device with them. Therefore, the present study utilized Wi-Fi Direct as the connecting medium for mobile devices and NFC technology for reading and retrieving data to achieve the aim of developing an app interface so that multiple displays can be connected together to form a large display. Multimedia such as images can then be moved between devices via a dragging motion while at the same time, they are also sent and saved directly to the connected devices. Alternatively, the interface can be used for sharing media files to multiple persons via enlarging and shrinking of the contents to be shared across multiple devices.
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Hosseinzadeh, khaligh Hadi. "Silver Nanowire Transparent Electrodes: Fabrication, Characterization, and Device Integration." Thesis, 2013. http://hdl.handle.net/10012/7428.
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Silver nanowire transparent electrodes have recently received much attention as a replacement for indium tin oxide (ITO) for use in various electronic devices such as touch panels, organic solar cells, and displays. The fabrication of silver nanowire electrodes on glass substrates with a sheet resistance as low as 9 Ω/□ and 90% optical transparency at 550 nm is demonstrated. These resistance and transparency values match that of commercially available indium tin oxide and are superior to other alternatives such as carbon nanotube electrodes. The nanowire electrodes are low cost and easy to fabricate. Moreover, by depositing nanowire films on plastic substrates, mechanically flexible electrodes are obtained. The silver nanowire electrodes are integrated into several electronic devices: transparent heaters, organic solar cells, and switchable privacy glass.
The concerns about the suitability of silver nanowire electrodes for use in commercial electronic devices are discussed. High surface roughness, one of the major concerns, is addressed by introducing a new method of embedding silver nanowires in a soft polymer. The instability of silver nanowire electrodes under current flow is also demonstrated for the first time. It is shown that silver nanowire electrodes fail under current flow after ass little as 2 days. This failure is caused by Joule heating which causes the nanowires to break up and thus create an electrical discontinuity in the nanowire film. Suggestions for improving the longevity of the electrodes are given.