Dissertations / Theses on the topic 'Integrated sensing and communication'
To see the other types of publications on this topic, follow the link: Integrated sensing and communication.
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 'Integrated sensing and communication.'
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
Theurer, Michael Andreas Davy [Verfasser], Martin [Akademischer Betreuer] Schell, Martin [Gutachter] Schell, and Frank [Gutachter] Peters. "Electroabsorption modulated lasers and hybridly integrated lasers for communication and sensing / Michael Andreas Davy Theurer ; Gutachter: Martin Schell, Frank Peters ; Betreuer: Martin Schell." Berlin : Technische Universität Berlin, 2021. http://d-nb.info/1238141013/34.
Full text
2
Cook, Benjamin Stassen. "Vertical integration of inkjet-printed RF circuits and systems (VIPRE) for wireless sensing and inter/intra-chip communication applications." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51844.
Full textAbstract:
Inkjet-printing is a technology which has for the last decade been exploited to fabricate flexible RF components such as antennas and planar circuit elements. However, the limitations of feature size and single layer fabrication prevented the demonstration of compact, and high efficiency RF components operating above 10 GHz into the mm-Wave regime which is critical to silicon integration and fully-printed modules. To overcome these limitations, a novel vertically-integrated fully inkjet-printed process has been developed and characterized up to the mm-Wave regime which incorporates up to five highly conductive metal layers, variable thickness dielectric layers ranging from 200 nm to 200 um, and low resistance through-layer via interconnects. This vertically-integrated inkjet printed electronics process, tagged VIPRE, is a first of its kind, and is utilized to demonstrate fully additive RF capacitors, inductors, antennas, and RF sensors operating up to 40 GHz. In this work, the first-ever fully inkjet printed multi-layer RF devices operating up to 40 GHz with high-performance are demonstrated, along with a demonstration of the processing techniques which have enabled the printing of multi-layer RF structures with multiple metal layers, and dielectric layers which are orders of magnitude thicker than previoulsy demonstrated inkjet-printed structures. The results of this work show the new possibilities in utilizing inkjet printing for the post-processing of high-efficiency RF inductors, capacitors, and antennas and antenna arrays on top of silicon to reduce chip area requirements, and for the production of entirely printed wireless modules.
3
Dandin, Marc Péralte. "Towards integrated fluorescence sensing." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7811.
Full textAbstract:
Thesis (M.S.) -- University of Maryland, College Park, 2007.Thesis research directed by: Dept. of Electrical and Computer Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
4
Kunzelman, Jill Nicole. "Polymers with Integrated Sensing Capabilities." Cleveland, Ohio : Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1238086140.
Full text
5
Lith, Joris van. "Novel integrated optical sensing platforms for chemical and immuno-sensing." Enschede : University of Twente [Host], 2005. http://doc.utwente.nl/58010.
Full text
6
Zhang, Ouyang. "Sensing and Anti-sensing with Wireless Communication Signal." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563230635193783.
Full text
7
Macken, Stephen. "Integrated Optical Solutions for Ubiquitous Sensing." Doctoral thesis, Linköpings universitet, Tillämpad Fysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-63709.
Full textAbstract:
Ubiquitous chemical sensing aims at exploiting consumer electronic devices as temporary chemical sensing platforms. These devices are a highly disseminated infrastructure, not presently being exploited for chemical sensing purposes. The goal of the ubiquitous chemical sensing field is to create the methodologies and adapted devices to profit from this unexploited resource. DVD drives, flat bed scanners and computer screens used in combination with web cameras, and mobile phones have been demonstrated as measuring platforms, during the past 10 years. In particular the combination of computer screens with web cameras, a technique called the computer screen photo-assisted technique (CSPT), is the most versatile approach to support multiple types of optical detection phenomena, and together with mobile phones are the most ubiquitous type of platforms. The versatility of CSPT comes from the ease with which one can configure a spectrally controlled, 2D micro-positioned, linearly polarized, wide angle and internally modulated illumination with a programmable screen, just by controlling the displayed contents. Concurrently, the imaging devices in CSPT enable one to capture arbitrary assay layouts, the evaluation of which can then be numerically customized. The full exploitation of the CSPT platform requires optically adapted sensing interfaces and specialized methods, in order to increase sensitivity and make use of all available information, for a thorough and complete chemical sensing analysis. In this thesis I have explored the foundations of CSPT sensing on integrated devices, developing methods and sensing’s interfaces that provide enhanced optical detection customized to the CSPT platform.
8
Cleary, Alison. "Integrated optical technologies for analytical sensing." Thesis, University of Glasgow, 2004. http://theses.gla.ac.uk/6607/.
Full textAbstract:
Recent diversification of the telecommunications industry has resulted in the adaptation of optical materials and their associated fabrication technologies for use in the bioanalytical sensor industry. Flame hydrolysis deposited (FHD) planar silica is one such material. Capable of producing high quality films for optical waveguides, the chemical inertness of the deposited silica makes it an ideal substrate from which to fabricate a biological fluorescence sensor. The aim of the work contained in this thesis was to utilise the FHD silica in optical - fluorescence sensors suitable for use at visible and in particular red wavelengths where several fluorophores can be excited, and background fluorescence from the silica is small. New technologies for producing waveguides have been evaluated in the context of their usefulness in optical sensors, with the intention of producing devices with as few fabrication steps as possible to reduce fabrication time and cost. The design, fabrication and testing of a number of sensor configurations is described, in which optical waveguides were interfaced with microfluidic chambers to provide excitation of a fiuorophore in solution. New waveguide fabrication technologies were used for the first time in sensor systems with integrated microfluidic circuits. Waveguides, written by electron beam densification were evaluated in terms of their performance in splitting an excitation signal into several different components, as would be appropriate for excitation of multiple microfluidic chambers - an 'array sensor'. Both Y-branch waveguides and multimode interference (MMI) splitters were successfully used to split the excitation signal. In addition to electron beam densification, UV irradiation at a wavelength of 157 nm was used to write waveguides in FHD silica. The application of a metal surface mask to define the waveguide structures is described. To allow sensitive detection and identification of fluorophores from FHD silica sensor chips, a single chamber device was successfully interfaced to a system to make time resolved fluorescence measurements, a technique known as time correlated single photon counting (TCSPC). The use of TCSPC allowed measurement of the decay time of the fluorescent dye, by which different fluorescent molecules could be identified, as well as the possibility of low concentration measurements. The research has allowed new technologies for creating waveguides in FHD silica to be adapted for sensing purposes, leading to a platform for creating devices in a number of different configurations.
9
Grime, Stewart Harper. "Communication in decentralised sensing architectures." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317875.
Full text
10
Zhuang, Quntao. "Quantum enhanced sensing and communication." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119115.
Full textAbstract:
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references.
Quantum phenomena such as entanglement and superposition enable performance beyond what classical physics can provide in tasks of computing, communication and sensing. Quantum sensing aims to enhance the measurement precision in parameter estimation or error probability in hypothesis testing. The first part of this thesis focuses on protocols for entanglement-enhanced sensing. However, various quantum sensing schemes' quantum advantage disappears in presence of decoherence from noise and loss. The quantum illumination protocol, on the other hand, has advantage over classical illumination even in presence of decoherence. This thesis provides the optimum receiver design for quantum illumination, and extends quantum illumination target detection to the realistic scenario with target fading and the Neyman-Pearson decision criterion. Quantum algorithms can solve difficult problems more efficiently than classical algorithms, which makes various classical encryption schemes vulnerable. To remedy this security issue, quantum key distribution enables sharing of secret keys with unconditional protocol security. However, the secret-key-rate of the state-of-art single-mode based quantum key distribution protocols are limited by a fundamental rate-loss trade-off. To enhance the secret-key-rate, this thesis proposes a multi-mode based quantum key distribution protocol. To prove its security, the noisy entanglement assisted classical capacity is developed to enable a security framework for two-way quantum key distribution protocols such as the one proposed here. An essential notion in the entanglement assisted capacity is additivity. This thesis constructs a channel with non-additive classical capacity assisted by limited entanglement assistance, even when the classical capacity of the channel is additive.
by Quntao Zhuang.
Ph. D.
11
Schaaf, Kristin Leigh. "Composite materials with integrated embedded sensing networks." 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?p3307537.
Full textAbstract:
Thesis (Ph. D.)--University of California, San Diego, 2008.Title from first page of PDF file (viewed July 23, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 116-120).
12
Ma, Hanbin. "Impedance based integrated circuits for biological sensing." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648847.
Full text
13
Marriott, A. P. "An integrated approach to image sensing and processing." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293261.
Full text
14
Hannel, Thaddaeus S. "PATTERN RECOGNITION INTEGRATED SENSING METHODOLOGIES (PRISMS) IN PHARMACEUTICAL PROCESS VALIDATION, REMOTE SENSING AND ASTROBIOLOGY." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/751.
Full textAbstract:
Modern analytical instrumentation is capable of creating enormous and complex volumes of data. Analysis of large data volumes are complicated by lengthy analysis time and high computational demand. Incorporating real-time analysis methods that are computationally efficient are desirable for modern analytical methods to be fully utilized. The use of modern instrumentation in on-line pharmaceutical process validation, remote sensing, and astrobiology applications requires real-time analysis methods that are computationally efficient.
Integrated sensing and processing (ISP) is a method for minimizing the data burden and sensing time of a system. ISP is accomplished through implementation of chemometric calculations in the physics of the spectroscopic sensor itself. In ISP, the measurements collected at the detector are weighted to directly correlate to the sample properties of interest. This method is especially useful for large and complex data sets. In this research, ISP is applied to acoustic resonance spectroscopy, near-infrared hyperspectral imaging and a novel solid state spectral imager. In each application ISP produced a clear advantage over the traditional sensing method.
The limitations of ISP must be addressed before it can become widely used. ISP is essentially a pattern recognition algorithm. Problems arise in pattern recognition when the pattern-recognition algorithm encounters a sample unlike any in the original calibration set. This is termed the false sample problem. To address the false sample problem the Bootstrap Error-Adjusted Single-Sample Technique (BEST, a nonparametric classification technique) was investigated. The BEST-ISP method utilizes a hashtable of normalized BEST points along an asymmetric probability density contour to estimate the BEST multidimensional standard deviation of a sample. The on-line application of the BEST method requires significantly less computation than the full algorithm allowing it to be utilized in real time as sample data is obtained. This research tests the hypothesis that a BEST-ISP metric can be used to detect false samples with sensitivity > 90% and specificity > 90% on categorical data.
15
Yin, Dongliang. "Integrated hollow core waveguide devices for optical sensing applications /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2006. http://uclibs.org/PID/11984.
Full text
16
Szajda, Kenneth S. (Kenneth Stanley). "A high resolution integrated circuit biomedical temperature sensing system." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11846.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.Vita.
Includes bibliographical references (p. 226-235).
by Kenneth S. Szajda.
Ph.D.
17
Hauke, Adam J. "An Integrated System for Sweat Stimulation, Sampling and Sensing." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535371796736114.
Full text
18
Messenger, Robert K. "Integrated Piezoresistive Sensing for Feedback Control of Compliant MEMS." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2115.pdf.
Full text
19
Liu, Qiankun. "SiGe photonic integrated circuits for mid-infrared sensing applications." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS166/document.
Full textAbstract:
La spectroscopie dans le moyen-infrarouge est une méthode universelle pour identifier les substances chimiques et biologiques, car la plupart des molécules ont leurs résonances de vibration et de rotation dans cette plage de longueurs d'onde. Les systèmes moyen infrarouge disponibles dans le commerce reposent sur des équipements volumineux et coûteux, tandis que de nombreux efforts sont maintenant consacrés à la réduction de leur taille et leur intégration sur circuits intégrés. L’utilisation de la technologie silicium pour la réalisation de circuits photoniques dans le moyen-infrarouge présente de nombreux avantages: fabrication fiable, à grand volume, et réalisation de circuits photoniques à hautes performances, compacts, légers et à faible consommation énergétique. Ces avantages sont particulièrement intéressant pour les systèmes de détection spectroscopique moyen infrarouge, qui besoin d'être portable et à faible coût. Parmi les différents matériaux disponibles en photonique silicium, les alliages silicium-germanium (SiGe) à forte concentration en Ge sont particulièrement intéressants en raison de la grande fenêtre de transparence du Ge, pouvant atteindre 15 µm. Dans ce contexte, l'objectif de cette thèse est d'étudier une nouvelle plate-forme SiGe à forte concentration en Ge, pour la démonstration de circuits photoniques moyen infra rouge. Cette nouvelle plate-forme devrait bénéficier d'une large gamme de transparence en longueurs d'onde de transparence et de la possibilité d’ajuster les propriétés des guides optiques (indice effectif, dispersion,…). Au cours de cette thèse, différentes plates-formes basées sur différents profils graduels du guide d’onde ont été étudiées. Tout d'abord, il a été démontré qu’il était possible d’obtenir des guides présentant de faibles pertes optiques inférieures à 3 dB/cm dans une large plage de longueurs d'onde, de 5,5 à 8,5 µm. Une preuve de concept de détection de molécules, basée sur l'absorption de la partie évanescent du mode optique a ensuite été démontrée. Ensuite, les composants formant les briques de base classiques de la photonique intégrée ont été étudiés. Les premières cavités intégrées ont été réalisées à 8 µm. Deux configurations ont été étudiées : des cavité Fabry-Perot utilisant des miroirs de Bragg intégrés dans les guides d’onde et des résonateurs en anneau. Un spectromètre à transformée de Fourier fonctionnant sur une large bande spectrale, et pour les deux polarisations de la lumière a également été démontré. Tous ces résultats reposent sur la conception des matériaux et des composants, la fabrication en salle blanche et la caractérisation expérimentale. Ce travail a été effectué dans le cadre du projet européen INsPIRE en collaboration avec le Pr. Giovanni Isella de Politecnico Di MilanoMid-infrared (mid-IR) spectroscopy is a nearly universal way to identify chemical and biological substances, as most of the molecules have their vibrational and rotational resonances in the mid-IR wavelength range. Commercially available mid-IR systems are based on bulky and expensive equipment, while lots of efforts are now devoted to the reduction of their size down to chip-scale dimensions. The use of silicon photonics for the demonstration of mid-IR photonic circuits will benefit from reliable and high-volume fabrication to offer high performance, low cost, compact, lightweight and power consumption photonic circuits, which is particularly interesting for mid-IR spectroscopic sensing systems that need to be portable and low cost. Among the different materials available in silicon photonics, Germanium (Ge) and Silicon-Germanium (SiGe) alloys with a high Ge concentration are particularly interesting because of the wide transparency window of Ge up to 15 µm. In this context, the objective of this thesis is to investigate a new Ge-rich graded SiGe platform for mid-IR photonic circuits. Such new plateform was expected to benefit from a wide transparency wavelength range and a high versatility in terms of optical engineering (effective index, dispersion, …). During this thesis, different waveguides platforms based on different graded profiles have been investigated. First it has been shown that waveguides with low optical losses of less than 3 dB/cm can be obtained in a wide wavelength range, from 5.5 to 8.5 µm. A proof of concept of sensing based on the absorption of the evanescent component of the optical mode has then been demonstrated. Finally, elementary building blocs have been investigated. The first Bragg mirror-based Fabry Perot cavities and racetrack resonators have been demonstrated around 8 µm wavelength. A broadband dual-polarization MIR integrated spatial heterodyne Fourier-Transform spectrometer has also been obtained. All these results rely on material and device design, clean-room fabrication and experimental characterization. This work was done in the Framework of EU project INsPIRE in collaboration with Pr. Giovanni Isella from Politecnico Di Milano
20
Makarfi, Abubakar Umar. "Spectrum sensing techniques in wireless communication networks." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/spectrum-sensing-techniques-in-wireless-communication-networks(8d74417f-007e-4875-9142-6ab60fc7bc27).html.
Full textAbstract:
Recent studies have confirmed that the currently employed spectrum management schemes have brought major inefficiencies in the usage of the frequency spectrum. As a result, dynamic spectrum access (DSA) technologies have been proposed to enable intelligent reuse of the frequency spectrum by secondary users (SUs). However, the SUs should be capable of sensing the surrounding wireless scene, in order to avoid harmful interference to the primary users (PUs) of the network. Several challenges that are generally encountered when conducting spectrum sensing have been identified. Thus, the main focus of this thesis is to address the highlighted coexistence and spectrum sensing challenges, while trying to overcome the shortcomings inherent within the selected sensing technique. The contributions of this study are explained as follows. The energy detector (ED) was examined under co-channel interference (CCI). The obtained mathematical models are derived using a moment generating function (MGF) approach. This approach provides several advantages over direct approaches, one of which is that it greatly simplifies averaging-out the random variables involved. Furthermore, the problem of detecting spread spectrum users was tackled. This issue was investigated by examining the efficiency of EDs to exploit opportunities resulting from the use of slow frequency hopping by the PUs. In addition, in order to curb the hidden node problem and due to the fact that coexistence etiquettes are not perfect against interference, the efficiency of EDs was further investigated under two simple multiple access protocols that do not require any centralised control. Furthermore, three other detector types were investigated. Firstly, the power law detector, which is a generalisation of the ED, for which no known exact PDFs exist for the statistics of its decision variable. Hence, approximations are generally relied upon. Here, novel precise approximations for the PDF and CDF of the PLD's decision variable were presented. Secondly, the performance of Kay's detector for unknown deterministic signals was analysed under AWGN, Rayleigh and Nakagami fading channels by deriving the relevant closed-form analytical expressions. Finally, the robustness of a matched filter detector in the presence of CCI was investigated. For all the detectors, accurate mathematical transformations were derived and their performance compared against the ED.
21
Ghasemi, Farshid. "Multiplexed label-free integrated photonic biosensors." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53633.
Full textAbstract:
Optics and photonics enable important technological solutions for critical areas such as health, communications, energy, and manufacturing. Novel nanofabrication techniques, on the other hand, have enabled the realization of ever shirking devices. On-chip photonic micro-resonators, the fabrication of which was made possible in the recent decade thanks to the progress in nanofabrication, provide a sensitive and scalable transduction mechanism that can be used for biochemical sensing applications. The recognition and quantification of biological molecules is of great interest for a wide range of applications from environmental monitoring and hazard detection to early diagnosis of diseases such as cancer and heart failure. A sensitive and scalable biosensor platform based on an optimized array of silicon nitride microring resonators is proposed for multiplexed, rapid, and label-free detection of biomolecules. The miniature dimension of the proposed sensor allows for the realization of handheld detection devices for limited-resource and point-of-care applications. To realize these sensors, the design, fabrication, stabilization, and integration challenges are addressed. Especially, the focus is placed on solving a major problem in using resonancebased integrated photonic sensors (i.e., the insufficiency of wavelength scan accuracy in typical tunable lasers available) by using an interferometric referencing technique for accurate resonance tracking. This technique can improve the limit of detection of the proposed sensor by more than one order of magnitude. The method does not require any temperature control or cooling, and the biosensor platform does not require narrow linewidths necessary for the biosensors based on ultrahigh quality factor resonators, thus enabling low-cost and reliable integration on the biosensor platform.
22
Balakrishnan, Gautam. "Cognitive radio cooperative spectrum sensing." Thesis, California State University, Long Beach, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10252432.
Full textAbstract:
The effectiveness of a cognitive radio (CR) system depends mainly on involved spectrum sensing techniques. The main aim of CR is for effective utilization of the spectrum opportunistically by sharing it with secondary users (SUs), when the primary user (PU) is absent. In this project, cooperative spectrum sensing using weights based on the distance measures from the PU and Multitaper Method (MTM) method is briefly explained. The results show that MTM method provides more accurate threshold value compared to other methods for low signal to noise ratios (SNRs), hence improving the spectrum sensing technique. The results also show that MTM method requires a lesser number of Orthogonal Frequency Division Multiplexing (OFDM) sub-blocks compared to Periodogram (PE) for the same performance.
23
Hutson, Jeffrey D. "Contemporary attitudes toward integrated marketing communication." Virtual Press, 2006. http://liblink.bsu.edu/uhtbin/catkey/1337196.
Full textAbstract:
This research utilized Q Method to learn whether attitudes regarding integrated marketing communication (IMC) among both educators and practitioners are consistent with placing IMC in an inductive or pre-theory stage of development within the theory building-research cycle. The analysis indicates an acceptance of IMC as a valid method of communication management among study participants. However the data is consistent with a negative, or at best ambiguous, conclusion when it comes to placing attitudes regarding IMC in an inductive or pre-theory stage of development within the theory building-research cycle. This then permits the conclusion that IMC at present is a communications management approach, not a nascent communication theory.Department of Journalism
24
Lloyd, Jennifer Anne. "An integrated circuit pressure sensing system with adaptive linearity calibration." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10447.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.Includes bibliographical references (p. 145-152).
by Jennifer Anne Lloyd.
Ph.D.
25
Huang, Kuan-chun. "Integrated sensing, dynamics and control of a mobile gantry crane." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/14123.
Full textAbstract:
This thesis investigates the dynamics and control of a Rubber Tyred Gantry (RTG) crane which are commonly used in container handling operations. Both theoretical and experimental work has been undertaken to ensure the balance of this research. The concept of a Global Sensing System (GSS) is outlined, this being a closed loop automatic sensing system capable of guiding the lifting gear (spreader) to the location of the target container by using feedback signals from the crane's degrees of freedom. To acquire the crucial data for the coordinates and orientation of the swinging spreader a novel visual sensing system (VSS) is proposed. In addition algorithms used in the VSS for seeking the central coordinates of the clustered pixels from the digitised images are also developed. In order to investigate the feasibility of different control strategies in practise, a scaled-down, 1/8, experimental crane rig has been constructed with a new level of functionality in that the spreader in this rig is equipped with multiple cables to emulate the characteristics of a full-size RTG crane. A Crane Application Programming Interface (CAPI) has been proposed to reduce the complexity and difficulty in integrating the control software and hardware. It provides a relatively user-friendly environment in which the end-user can focus on implementing the more fundamental issues of control strategies, rather spending significant amounts of time in low-level device-dependent programming. A control strategy using Feedback Linearization Control (FLC) is investigated. This can handle significant non-linearity in the dynamics of the RTG crane. Simulation results are provided, and so by means of the CAPI this controller is available for direct control of the experimental crane rig. The final part of the thesis is an integration of the analyses of the different subjects, and shows the feasibility of the real-time implementation.
26
Foy, Christopher Ph D. (Christopher C. )Massachusetts Institute of Technology. "Solid-state spin-integrated circuits for quantum sensing and control." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127017.
Full textAbstract:
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, May, 2020Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 131-138).
Spin systems are an increasingly important quantum-sensing platform. In particular, atomic defect centers in diamond called nitrogen-vacancy (NV) centers offer impressive room temperature imaging capabilities for both magnetic fields and temperature. NV-based sensing platforms have found utility in solid-state physics, biological systems, and vector magnetometry. These applications highlight the immense promise of NV quantum sensors. Despite this promise, the use of NV centers within commercial devices remains limited to date, with many impediments to transitioning this platform from the laboratory. This thesis describes the development of solid-state spin-integrated circuits (S3IC) for quantum sensing and control with the overarching goal of creating scalable NV platforms. We present two major experiments that develop S3IC. These expand the application space of NV centers and improve device functionality. The first application was to develop an NV spin microscope capable of wide-field temperature and magnetic field imaging to elucidate functional device behavior at the microscopic scale. The second experiment was integrating the essential components of an NV spin microscope, spin control and detection, with integrated electronics. In this manner, S3IC combines the exceptional sensitivity of NV centers with the robustness and scalability of modern electronic chip-scale platforms. This co-integration of spin systems into integrated electronics shows a potential path for migrating previous proof-of-principal sensing demonstrations into affordable packages that demonstrate both much greater system integration and custom electronic architectures. In short, this work demonstrates advances in NV-ensemble quantum sensing platforms and establishes a foundation for future integration efforts, perhaps inspiring innovations in both application space and the development of new quantum devices.
by Christopher C. Foy.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
27
Asgari, Mohammadreza. "FULLY-INTEGRATED CMOS PH, ELECTRICAL CONDUCTIVITY, AND TEMPERATURE SENSING SYSTEM." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1533827604228324.
Full text
28
Cai, Yi. "INTEGRATED WEARABLE SENSING AND SMART COMPUTING FOR MOBILE PARKINSONIAN HEALTHCARE." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1617620318291192.
Full text
29
Huang, Yi. "Development of self-monitoring structural composites with integrated sensing networks." 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?p3307585.
Full textAbstract:
Thesis (Ph. D.)--University of California, San Diego, 2008.Title from first page of PDF file (viewed July 23, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.
30
Rahimi, Fatemeh. "Selective Sensing in Hybrid Imagers with Vertically Integrated Perovskite Pixels." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7704.
Full textAbstract:
The rise of organometal halide perovskite materials with extremely intriguing properties have opened a new horizon in the design of high speed and low price optoelectronic devices. The bandgap in the crystalline structure of these materials can be easily tuned for various applications and their dominant non-excitonic dynamics eliminate the requirement of a bulk or heterostructure for charge carrier separation. These unique properties increase the photo-sensitivity of perovskite-based optoelectronics and provide them with a low time constant, resulting in high precision fast devices. Realization of perovskite-based devices translates directly to inexpensive and simplified architectures of optoelectronic systems.
In perovskite-based devices, costly silicon or wide bandgap semiconductor fabrication technology is largely replaced by solution processable methods. Their bandgap tunability allows the reduction of the required optical accessories and interconnects in optoelectronic components. For instance, a tuned perovskite-based detector can substitute a narrowband detecting system consisting of a conventional detector and its required optical accessories such as lenses and color filters. These properties of perovskite-based devices lead to the realization of inexpensive, low power and high-performance optoelectronic systems. In this work, the design of a narrowband, low noise, high performance and stable photodetector based on organic-inorganic hybrid perovskite structure is proposed. The full width at half maximum (FWHM) of the device would be in the nanometer range. The response of the device can be tuned using either different ratios of the lead salts or synthetic dyes (macromolecules) in the crystalline structure for color discrimination in machine vision and imaging applications.
Non-excitonic photocarrier generation, tunability of the optical bandgap and low voltage requirements for charge carrier generation are the keys to the utility of this optoelectronic device. The goals of this project were to identify the required functional materials (lead salts and synthetic dyes based on their molecular structures) and optimize their performance; the study of their effect on the charge collection narrowing mechanism and bandwidth specifications defined for detectivity, linear dynamic range (LDR) and photoresponse speed. To achieve these goals, it was proposed to study the light detection properties as well as spectroscopic and semiconductor parameter characteristics of fabricated devices. The design considerations of such devices are versatile and may be modulated for different applications.
31
Popat, Roman. "Communication, cooperation & conflict in quorum sensing bacteria." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/12468/.
Full textAbstract:
The scientific community has gathered an extremely detailed and sophisticated understanding of the genetic and molecular underpinnings of microbial communication. How these microbial communication systems arise and are maintained over evolutionary time-scales however has received relatively little attention. Some major questions remain unanswered such as; what is the function of small diffusible molecules? How does population structure affect the dynamics of social communication and what is the link between the ecology of communication and the virulence of a pathogenic population? Borrowing concepts from evolutionary theory can help to unravel these fundamental questions in the context of microbial communication as it has done in other taxa displaying social behaviours. In addition microbial model organisms in which molecular and genetic tools are abundant lend enormous power to empirical tests of evolutionary theory. This work combines both of these in an attempt to understand the evolution of bacterial communication using the model organism Pseudomonas aeruginosa and its well characterised Quorum Sensing systems. Specifically the focus is in three areas. Firstly this study reveals that the stability of bacterial signalling is vulnerable to perturbations in cost and benefit and genetic conflict. Secondly this study finds that spatial structure (biofilm vs planktonic) influences the outcome of social competition over signalling and reduces population viability. Thirdly this study finds that interspecific and intraspecific competition over public goods impose divergent selective pressures on communication.
32
Sun, Xu. "Hybrid Plasmonic Devices for Optical Communication and Sensing." Doctoral thesis, KTH, Optik och Fotonik, OFO, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-205974.
Full textAbstract:
Hybrid plasmonic (HP) waveguides, a multi-layer waveguide structure supporting a hybrid mode of surface plasmonics and Si photonics, is a compromise way to integrate plasmonic materials into Si or SOI platforms, which can guide optical waves of sub-wavelength size, and with relative low propagation loss. In this thesis, several HP waveguides and devices are developed for the purposes of optical communications and sensing. The single-slot HP ring resonator sensor with 2.6µm radius can give a quality factor (Q factor) of 1300 at the communication wavelength of 1.5µm with a device sensitivity of 102nm/RIU (refractive index unit). The Mach-Zehnder interferometer (MZI) with a 40µm double-slot HP waveguide has a device sensitivity around 474nm/RIU. The partly open silicon side-coupled double-slot HP ring resonator has a device sensitivity of 687.5nm/RIU, with a Q factor over 1000 after optimization. Further, an all-optical switching HP donut resonator with a photothermal plasmonic absorber is developed, utilizing the thermal expansion effect of silicon to shift the resonant peak of the HP resonator. The active area has a radius of 10µm to match the core size of a single-mode fiber. By applying 10mW power of the driving laser to the absorber, the resonator transmitted power can be changed by 15dB, with an average response time of 16µs. Using the same fabrication flow, and removing the oxide materials using hydrogen fluoride wet etching, a hollow HP waveguide is fabricated for liquid sensing applications. The experimentally demonstrated waveguide sensitivity is about 0.68, which is more than twice that of pure Si waveguide device. Microelectromechanical systems (MEMS) can also be integrated into vertical HP waveguides. By tuning the thickness of the air gap, over 20dB transmitted power change was experimentally demonstrated. This can be used for optical switching applications by either changing the absorption or phase of the HP devices.QC 20170427
33
Stolyarov, Alexander. "Integrated Optofluidic Multimaterial Fibers." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10080.
Full textAbstract:
The creation of integrated microphotonic devices requires a challenging assembly of optically and electrically disparate materials into complex geometries with nanometer-scale precision. These challenges are typically addressed by mature wafer-based fabrication methods, which while versatile, are limited to low-aspect-ratio structures and by the inherent complexity of sequential processing steps. Multimaterial preform-to-fiber drawing methods on the other hand present unique opportunities for realizing optical and optoelectronic devices of extended length. Importantly, these methods allow for monolithic integration of all the constituent device components into complex architectures. My research has focused on addressing the challenges and opportunities associated with microfluidic multimaterial fiber structures and devices. Specifically: (1) A photonic bandgap (PBG) fiber is demonstrated for single mode transmission at 1.55 µm with 4 dB/m losses. This fiber transmits laser pulses with peak powers of 13.5 MW. (Chapter 2) (2) A microfluidic fiber laser, characterized by purely radial emission is demonstrated. The laser cavity is formed by an axially invariant, 17-period annular PBG structure with a unit cell thickness of 160nm. This laser is distinct from traditional lasers with cylindrically symmetric emission, which rely almost exclusively on whispering gallery modes, characterized by tangential wavevectors. (Chapter 4)(3) An array of independently-controlled liquid-crystal microchannels flanked by viscous conductors is integrated in the fiber cladding and encircles the PBG laser cavity in (2). The interplay between the radially-emitting laser and these liquid-crystal modulators enables controlled directional emission around a full azimuthal angular range. (Chapter 4) (4) The electric potential profile along the length of the electrodes in (3) is characterized and found to depend on frequency. This frequency dependence presents a new means to tune the transversely-directed transmission at a given location along the fiber axis. (Chapter 5) (5) A chemical sensing system is created within a fiber. By integrating a chemiluminescent peroxide-sensing material into the hollow core of a PBG fiber, a limit-of-detection of 300 ppb for peroxide vapors is achieved. (Chapter 3)Engineering and Applied Sciences
34
Kolsarici, Nalca Ceren. "Flexible models of integrated marketing communication effects." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66860.
Full textAbstract:
This thesis comprises three essays and investigates complex effects of integrated marketing communications, using advanced statistical and econometric models. The first essay focuses on the measurement of complex multi-media communications effects such as thresholds, saturation levels and cross-media synergies. We use, MARS, a non-parametric regression method based on multivariate adaptive splines, and show that it, successfully trading-off the bias reduction and variance increase, performs superior to parametric and non-parametric benchmarks in model fit and predictive validity. The results provide compelling evidence to one or more threshold points, saturation levels, early saturation for newspaper advertisements and support for possible supersaturation for certain media. Moreover, we quantify the observed threshold and saturation levels using non-parametric derivatives and find that majority of the media perform in inefficient spending ranges. The second essay examines the dynamic effects of direct-to-consumer advertising (DTCA) in a market where regulations impose restrictions on the type and content of prescription pharmaceutical advertising. We identify three research questions that should be of great managerial interest: Whether DTCA is a reasonable option to choose under these regulations. If so, which type of DTCA is more effective, and when? We pursue these questions by examining data on new and refill prescriptions for a novel pharmaceutical through the implementation of an Augmented Kalman Filter with continuous state and discrete observations (AKF(C-D)). Our findings suggest the presence of complex DTCA dynamics for the two types of regulation-induced advertising messages. We discuss implications and provide extensive validation tests that confirm the superiority of our modeling approach. The final essay investigates the influence of market heterogeneity on the consumer and physician directeCette thèse comprend trois essais et examine les effets complexes des communications marketing intégrées, utilisant des modèles statistiques et économétriques avancés. Le premier essai se concentre sur la mesure des effets complexes des communications multimédia comme les seuils minimums, les niveaux de saturation et les synergies des médias croisés. Nous utilisons, MARS, une méthode de régression non paramétrique basée sur des courbes adaptatives multivariables, et ce qui démontre qu'équilibrant avec succès la réduction de l'erreur moyenne et de l'écart de l'augmentation, MARS s'exécute mieux aux points de référence paramétriques et non paramétriques dans l'ajustement du modèle et la validité prédictive. Les résultats fournissent la preuve irréfutable d'un ou plusieurs points de seuil minimum, de niveaux de saturation, de la saturation précoce pour les publicités dans la presse écrite et d'un appui pour une possible sursaturation de certains médias. De plus, nous évaluons quantitativement le seuil observé et les niveaux de saturation en utilisant des dérivés non paramétriques et constatons que la majorité des médias s'exécute dans des gammes de dépenses inefficaces.Le deuxième essai examine les effets dynamiques de la publicité directe au consommateur (DTCA) dans un marché où les règlements imposent des restrictions sur le type et le contenu de la publicité pour les prescriptions pharmaceutiques. Nous identifions trois questions de recherche qui devraient être de grand intérêt en gestion, c'est-à-dire : Si la DTCA est une option raisonnable à choisir conformément à ces règlements ? S'il en est ainsi, quel type de DTCA est le plus efficace et quand ? Nous poursuivons ces questions en examinant des données sur les nouvelles prescriptions et les renouvellements de prescriptions pour un nouveau médicament par la mise en oeuvre d'un Filtre Kalman Augm
35
Jewell, Stacy Ellen. "Integrated Marketing Communication Strategies in Ohio Agribusinesses." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338162453.
Full text
36
Contreras, Andres A. "Micronetworking: Reliable Communication on 3D Integrated Circuits." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/728.
Full textAbstract:
The potential failure in through-silicon vias (TSVs) still poses a challenge in trying to extend the useful life of a 3D integrated circuit (IC). A model is proposed to mitigate the communication problem in 3D integrated circuits caused by the breaks at the TSVs. We provide the details of a low-complexity network that takes advantages of redundant TSVs to make it possible to re-route around breaks and maintain effective communication between layers. Different configurations for the micronetwork are analyzed and discussed. We also present an evaluation of the micronetwork's performance, which turns out to be quite promising, based on several Monte Carlo simulations. Finally, we provide some directions for future research on the subject.
37
Li, Shuda. "Robust localisation and dense mapping using integrated vision and depth sensing." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.720853.
Full text
38
Li, Yan. "An integrated water quality monitoring system with dynamic remote sensing feedback /." Online version of thesis, 2007. http://hdl.handle.net/1850/5834.
Full text
39
Vollmer, Adam P. "Development of an integrated microfluidic platform for oxygen sensing and delivery." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32374.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.Includes bibliographical references (p. 115-120).
Treatment for end stage lung disease has failed to benefit from advances in medical technology that have produced new treatments for cardiovascular disease, certain cancers, and other major illnesses in recent years. As a result, end stage lung disease remains a devastating condition with few therapeutic options. To address the need for improved methods of respiratory life support, a novel technology was developed capable of generating oxygen directly from water present in blood plasma. This technology is intended to provide a self-contained, mobile oxygen supply suitable for implantation or extracorporeal oxygenation in support of an acute or chronically disabled lung. The core technology couples an optoelectronic metal oxide film with a microfluidic capillary network to facilitate oxygen exchange with flowing blood and replicate pulmonary capillary respiration. This thesis focuses on the optimization of this microfluidic capillary network with respect to hemocompatibility, mass transfer, and dissolved oxygen detection. Microfluidic capillary devices were fabricated from silicone rubber using multilayer soft lithography to create dense 2D networks of bifurcating channels. To quantify the effectiveness of mass transfer in various channel geometries under differing experimental conditions, a mathematical model of oxygen convection and diffusion was generated. A novel integrated optical oxygen sensor based on an oxygen-quenched luminescent dye was developed to detect oxygen concentrations within the microfluidic device. Mass transfer within the microfluidic oxygenator was characterized experimentally, employing the integrated optical sensor, and analytically, using the convective model.
(cont.) Excellent agreement was found between experimental and analytical results. We conclude that the microfluidic platform achieves rapid and efficient diffusion of oxygen into a liquid medium, effectively mimicking the function of the pulmonary system. The combination of precise oxygen delivery and detection, integrated into a miniature device, is widely applicable both to the photolytic artificial lung and to a broader class of applications related to detection of chemical species in biological microdevices.
by Adam P. Vollmer.
S.M.
40
Shih, Ta-Ming Ph D. Massachusetts Institute of Technology. "Indium phosphide based integrated photonic devices for telecommunications and sensing applications." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/75449.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 193-205).
Photonics is an exciting area of study that is situated at the cross-section of physics, material science, and electrical engineering. The integration of photonic devices serves to reduce the size, weight, power consumption, and cost of the photonics- based systems, whose applications can be as disparate in nature as communications and medicine. In particular, an integrated all-optical logic gate and wavelength converter for fiber-optic telecommunications and an integrated tunable laser for trace-gas sensing are investigated in this thesis. These devices are fabricated in the indium phosphide (InP) material system, which includes InP and the ternary/quaternary III-V semiconductors that can be grown closely lattice-matched on the InP substrate. The all-optical logic gate is designed as a Mach-Zehnder interferometer with semi- conductor optical amplifiers as active nonlinear elements that are optically coupled to the passive waveguides using the asymmetric twin waveguide technique. The device is grown and fabricated monolithically and carrier-dependent optical interference is demonstrated at the 1.55 [mu]m wavelength. The tunable diode laser is designed to operate in the wavelength range of 1.55 [mu]m - 2 [mu]m for trace-gas spectroscopic sensing and comprises of strained InGaAs quantum wells. The laser is monolithically fabricated using mask-less lithography techniques and tuning is demonstrated in Fabry-Perot cavity lasers under continuous-wave operation. A ring-coupled 2 [mu]m wavelength laser is designed that will exhibit a tuning range of tens of nanometers.
by Ta-Ming Shih.
Ph.D.
41
Bozorgzadeh, Bardia. "Integrated Microsystems for High-Fidelity Sensing and Manipulation of Brain Neurochemistry." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1432223568.
Full text
42
Siwak, Nathan Paul. "Indium phosphide MEMS cantilever waveguides with integrated readout for chemical sensing." College Park, Md.: University of Maryland, 2007. http://hdl.handle.net/1903/7681.
Full textAbstract:
Thesis (M.S.) -- University of Maryland, College Park, 2007.Thesis research directed by: Dept. of Electrical and Computer Engineering Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
43
Lee, Hoseon. "Inkjet-printed RF modules for sensing and communication applications." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50265.
Full textAbstract:
The objective of the proposed research is to integrate nanotechnology, applied electromagnetics, and inkjet printing fabrication methods to develop a series of novel inkjet-printed RF modules for sensing and communication applications: wireless gas sensor, wearable RFID tag, and RF inductor.
Passive, wireless sensors have various applications in a wide range of fields including military, industry, and medicine. However, there are issues such as cost, sensitivity of sensors, manufacturing complexities, and feasibility of further miniaturization of these RF modules. One aspect of this research investigates the feasibility of addressing these issues by integrating nanotechnology and applied electromagnetics. The underlying common theme for the three designs is inkjet-printing silver nanoparticles on organic paper substrate.
The research will investigate the characterization of thin film carbon nanotubes and the optimization of inkjet-printing the CNT material on paper substrate followed by the design of a patch antenna based gas sensor. Measurement results from a closed measurement system will be shown. Secondly, an inkjet-printed, conformal, wearable RFID tag on an artificial magnetic conductor is designed and tested using an RFID Reader. Lastly an inkjet-printed high Q RF inductor is designed and integrated with magnetic nanomaterial to evaluate the feasibility of increasing inductance using high permeability nanomaterial. Through the design and testing of the aforementioned three designs, it will be shown that through a multidisciplinary design process, novel, low-cost RF modules can be designed for sensing and communication applications.
44
Jones, Faye-Ellen. "Inhibition of N-acyl-homoserine lactone quorum sensing." Thesis, University of Aberdeen, 2000. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602017.
Full textAbstract:
Quorum-sensing amongst Gram-negative bacteria is an important method of intercellular communication required for conveying information about population density. The extracellular accumulation of the signal molecule involved, N-acyl homoserine lactone (AHL), leading to increases in internal physiological concentration, allows phenotypic switching to occur that is beneficial to the bacterial population. In our laboratory, analysis of the effect of AHL on phenotype currently involves creating null mutants unable to produce AHL, then reintroducing the signal molecule exogenously. With the increasing number of human, animal and plant pathogens utilising AHL quorum-sensing for regulating viirulence, AHLs have become prime targets for anti-infective therapy and crop-protection. The research described here has investigated methods of inhibition of quorum-sensing through the AHL signal molecule. These include the application of extremes of temperature and pH, and isolation and characterisation of the first recombinant human antibody fragment specific to AHLs from a naive phage display library, which could be used to examine cell-cell communication without the need for gene manipulation.
45
Kataria, Amit. "Cognitive radios spectrum sensing issues /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5047.
Full textAbstract:
Thesis (M.S.)--University of Missouri-Columbia, 2007.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 28, 2008) Includes bibliographical references.
46
Jofre, Cruanyes Marc. "Integrated photonic transmitters for secure space quantum communication." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/117469.
Full textAbstract:
An important issue in today's information society is the security of data transmission against potential intruders, which always put at risk the confidentiality. Current methods to increase security require that the two parties wishing to transmit information, exchange or share one or more security keys. Once the key has been identified, the information can be transferred in a provable secure way using a one-time pad, i. e. the key length is as long as the plaintext. Therefore, the security of the information transmission is based exclusively on the security of the key exchange. Quantum cryptography, or more precisely quantum key distribution (QKD), guarantees absolutely secure key distribution based on the principles of quantum physics, according to which it is not possible to measure or reproduce a state (e.g. polarization or phase of a photon) without being detected. The key is generated out from the measurement of the information encoded into specific quantum states of a photon, named qubits. For example, a qubit can be created using properties such as the polarization or the phase of a photon.
Achieved goals of this thesis are the development of a new class of high speed integrated photonic sources for applications in quantum key distribution systems, capable of producing unprecedented qubit rates (100 Mbps - 1 Gbps) and transmitting those over larger distances than those achieved so far (>200 km). More specifically the work has been focused on developing faint pulse sources which can be used in very demanding environmental conditions, such as those in Space. For the development of these sources, apart from the optical design, essential is the opto-mechanical engineering as well as the integration with the electronics. One of the objectives was to achieve very high level of integration and power efficiency, e.g. volumes and power consumption between 10 and 100 times smaller than those typical of a laboratory experiment. Moreover, work in related parts of a whole QKD transmission system has been carried out. In particular, a new scheme for a compact, fast and simple random number generator has been demonstrated successfully achieving a random number generation rate of 1.1 Gbps. Also, during the course of this thesis, the development and engineering of a free-space QKD optical link has been initiated.
This thesis makes use of novel ideas to alternatively demonstrate proof-of-concept experiments, which could then further develop into commercial products. To this end, close collaborations with world-wide leading companies in the field have been established. The Optoelectronics Group at ICFO has been involved in current European Space Agency (ESA) projects to develop a small footprint and low power consumption quantum transceiver and a high-flux entangled photon source.En l’actual societat del coneixement és important la seguretat en la transmissió de dades contra potencial intrusos, els quals sempre posen en risc la confidencialitat. Mètodes actuals per incrementar la seguretat requereixen que les dos parts que volen transmetre informació, intercanviïn o comparteixin una o més claus. Una vegada la clau ha estat identificada, la informació pot ser transferida de forma provadament segura utilitzant ”‘one-time pad”’. Per tant, la seguretat en la transmissió de la informació es basa exclusivament en la seguretat en l’intercanvi de la clau. La criptografia quàntica, o més precisament distribució de clau quàntica (QKD), garanteix absolutament la seguretat de la distribució de la clau basant-se en els principis de la física quàntica, segons la qual no és possible mesurar o reproduir un estat (p. e. la polarització o fase d’un fotó) sense ser detectat. La clau es genera a partir de les mesures de la informació codificada en estat quàntics del fotó, anomenats qubits. Per exemple, un qubit pot ser creat utilitzant propietats com la polarització o fase d’un fotó. Els objectius aconseguits d’aquesta tesis són el desenvolupament d’una nova classe d’emissors fotònics d’alta velocitat per a aplicacions en sistemes de distribució de clau quàntica, capaç¸os de produir velocitats de qubit sense precedents (100 Mbps - 1 Gbps) i transmetre’ls a través de distàncies més llunyanes que les aconseguides fins ara (> 200 Km). Més en concret el treball s’ha centrat en el desenvolupament de fonts de pulsos atenuats que poden ser usades en condicions ambientals molt extremes, com les presents a l’Espai. Per al desenvolupament d’aquestes fonts, apart del disseny òptic, importantíssim es l’enginyeria optomecànica com també la integració amb la electrònica. Un dels objectius ha estat aconseguir un molt alt nivell de integració i eficiència de potència, p. e. volums i consums de potència entre 10 i 100 vegades més petits que els típics en experiments de laboratori. Ademés, s’ha realitzat treball en altres parts relacionades amb un sistema de transmissió QKD. En particular, un nou esquema per a un generador de números aleatori compacte, ràpid i simple ha estat positivament demostrat aconseguint velocitats de generació de números aleatoris de 1:1 Gbps. També, el desenvolupament i enginyeria d’un enllaç òptic per a QKD en espai lliure ha estat iniciat durant aquesta tesis. Aquesta tesis utilitza idees novedoses per a demostrar experiments de prova de concepte, els quals poden esdevenir en productes comercials. Per a aquest fi, s’han establert col•laboracions amb empreses internacionals líders del sector. A més a més, el Grup d’Optoelectrònica de ICFO ha estat involucrat en projectes de la Agència Espacial Europea (ESA) per a desenvolupar un transceptor quàntic de tamany reduït i baix consum de potència, el qual també conté una font de fotons entrellaçts d’alt flux.
47
Kaleja, Martin. "Active integrated antennas for sensor and communication applications." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963771116.
Full text
48
Mokhtari, Mehran. "High frequency monolithic integrated circuits for communication systems /." Stockholm, 1998. http://www.lib.kth.se/abs98/mokh1218.pdf.
Full text
49
Fish, Robert Simon Zachary. "An integrated framework for runtime adaptable communication systems." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269747.
Full text
50
Li, TianLi, Xiaoyu Zhang, and Kai Yang. "The dilemma of implementation of Integrated marketing communication." Thesis, Linnéuniversitetet, Institutionen för marknadsföring (MF), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-75869.
Full textAbstract:
Background: Integrated marketing communication (IMC) became increasingly popular since 2005, the IMC is built of four parts. The first part is a concept and it also is the process. The second part explains that IMC needs special skill and knowledges. The third part described the IMC have three pillars which focus on audience, channel and the result. The last part refers to that IMC attempts to the increase of company communication. The concept of IMC can be called “Speak with One Voice”. The meaning of IMC includes advertising, promotion, public relations, direct marketing. CI, packaging, news media and all other communication activities within the scope of marketing activities, but also enables companies to communicate unified communicate information to consumers.Purpose: The researchers of this thesis aim to explore the barriers when organizations implement integrated marketing communication.Methodology: In this paper, authors used qualitative research under deductive approach. The primary data was gathered with six participants from different advertisement agencies. All the interviews were conducted with semi-structured interview.Conclusion: Through the preview semi-structured interviews, there are two barriers has been agreed with all of these 6 participants who are from different advertising agencies. Authors defined these two barriers as the main barriers to implement integrated marketing communication by organizations: the management knowledge and Lack of horizontal communication. Authors also have some important finding about new barriers of implementation to integrated marketing communication. Three of our participants from different adverting agency with a lot of experience on IMC mentioned that the employees' trust in leadership of managers is also one of the main barriers. Authors believe this might be another main barrier for organization on implementation of IMC and should attract enough attention by marketers.Key words: Intergrated marketing communication, barriers, management knowledge and Lack of horizontal communication