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1
Tekgül, Hasan, und Yu Khoon Ng. „Power Measurement Device“. Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-15407.
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This thesis project aims to develop an embedded system that can measure real-time power consumption of a house and provide information for the user. System consists of a microcontroller unit, a light sensor, RS232 serial interface, battery and an LED. An 18F series 8bit PIC microcontroller was used for this project because PIC is known to be versatile and very low power-consuming. The goal was to get periodic signal from the sensor mounted on the power meter of a house, calculate the power usage and send this data to serial port for communication purposes. The system is connected to PC through RS232 interface as the first step of the project. The power usage information and a simple user interface sent from the PIC are displayed on the HyperTerminal of the PC. The second step was to communicate with a wireless module which is connected to the central unit of the alarm system in a house. This part of the project requires modification of the communication protocol to suit the one that the company uses in the wireless module. As the power source we chose a 9V battery since the system needs 5V to operate. However it is just the prototype. Therefore the power source choice can be changed in future due to company needs. The LED used in the prototype is for testing purposes and it is also due to changes if not needed. As the result of the project, the first step is finished with minimum requirements. The external hardware is built with all the components and the software is implemented successfully. The system can get signals from the photo sensor; the result is calculated according to the duration between two signals; it is sent to the PC via RS232 serial port and displayed on the PC terminal.
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Eide, Jarle, und Jan Ove Skogheim Olsen. „Forensic analysis of an unknown embedded device“. Thesis, Norges Teknisk-Naturvitenskaplige Universitet, Institutt for datateknikk og informasjonsvitenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10060.
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Every year thousands of new digital consumer device models come on the market. These devices include video cameras, photo cameras, computers, mobile phones and a multitude of different combinations. Most of these devices have the ability to store information in one form or another. This is a problem for law enforcement agencies as they need access to all these new kinds of devices and the information on them in investigations. Forensic analysis of electronic and digital equipment has become much more complex lately because of the sheer number of new devices and their increasing internal technological sophistication. This thesis tries to help the situation by reverse engineering a Qtek S110 device. More specifically we analyze how the storage system of this device, called the object store, is implemented on the devices operating system, Windows Mobile. We hope to figure out how the device stores user data and what happens to this data when it is "deleted". We further try to define a generalized methodology for such forensic analysis of unknown digital devices. The methodology takes into account that such analysis will have to be performed by teams of reverse-engineers more than single individuals. Based on prior external research we constructed and tested the methodology successfully. We were able to figure our more or less entirely the object stores internal workings and constructed a software tool called BlobExtractor that can extract data, including "deleted", from the device without using the operating system API. The main reverse engineering strategies utilized was black box testing and disassembly. We believe our results can be the basis for future advanced recovery tools for Windows Mobile devices and that our generalized reverse engineering methodology can be utilized on many kinds of unknown digital devices.
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Thandee, Rithirong. „Ieee 802.15.4 Implementation on an Embedded Device“. Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/31777.
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Software Defined Radio (SDR) is a growing technology that allows radio communication to
become interoperable. SDR can lower the cost for a particular hardware radio to commu-
nicate with another radio that uses a different standard. In order to show the capability of
SDR, this thesis shows how to implement IEEE 802.14.5, a low-rate wireless personal area
network (LR-WPAN) standard, on a standalone embedded machine.
The implementation is done using a universal software radio peripheral embedded, USRP
E100, an open source software development toolkit for SDR, GNU Radio, and UCLA
ZigBee PHY GNU Radio application. The implementation can be done on the regular non-
embedded USRPs. However, without a fast host computer demodulating the packets, the
USRP E100 cannot receive incoming packets. An available FPGA is used to solve this prob-
lem by doing a software-hardware hybrid design to allow the USRP E100 to communicate
with other IEEE 802.15.4 devices. The final product is an IEEE 802.15.4 monitor software
that detects messages from devices communicating using IEEE 802.15.4 in its range. In addi-
tion, recommendations are presented for improving SDR education and training, particularly
for developers with backgrounds in disciplines other than communications engineering.Master of Science
4
Vincent, Tonja S. „From Epistolary Form to Embedded Narratological Device: Embedded Epistles in Austen and Scott“. BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6444.
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The perception that the epistolary form was rejected by novelists during the Romantic Era has largely been accepted by scholars. However, in looking at the period's two most prominent authors, Walter Scott and Jane Austen, we see that the epistolary form remained vibrant long after its supposed demise. Throughout their careers, both Austen and Scott employed embedded letters as a tool to create authenticity. Both Austen and Scott use what I call "literary letters" to create a sense of realism in their novels that contributed to the rise of the novel. Scholars often claim that Austen eschewed the epistolary form with Lady Susan and solidified her rejection by revising both Sense and Sensibility and Pride and Prejudice from epistolary novels to third person narration. But a careful examination shows that Austen followed Richardson's tradition with Lady Susan, that Sense and Sensibility was not originally written in epistolary form, and that Austen retained sixteen critical letters in Pride and Prejudice. In fact, Darcy's five-page letter to Elizabeth signals Austen's continued reliance on the form as it completely changes the dynamics of the novel and transforms Elizabeth from a static protagonist to a dynamic heroine. Further indication that Austen found value in the form is seen in her later and often considered more mature novels, Emma and Persuasion, where she found innovate ways to turn the epistolary form into an embedded narratological device. The value of letters in Scott's novels is often overlooked. For instance in Heart of Midlothian, Jeanie Down's claim that letters cannot feel is often cited as an argument that oral testimony is more valuable than written, yet it is a letter that ultimately gets her an audience with the queen. In fact, in both Heart of Midlothian and Redgauntlet, Scott explains the legal implications of the written testimony, its preference over oral testimony, and its power in persuading both in and out of court. And in Guy Mannering, Scott relies on embedded letters to develop important plot points including the identity of the lost heir, create believable characters, and explore the conflict between Scottish traditions and law. And although Redgauntlet is often considered the moment Scott eschewed the epistolary form, the way he employs letters to create the illusion that his characters are authentic historical figures helps him explore notions of national identity.
5
Saud, M. (Muhammad). „Embedded Linux based demonstration device for printed electronics“. Master's thesis, University of Oulu, 2014. http://urn.fi/URN:NBN:fi:oulu-201403131189.
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As use of printed electronics is going towards expansion in near future, researchers are studying methods for development of printed components, and also procedures for driving them. Few low speed but low cost, and flexible stand alone systems e.g., some sensor systems and displays; have already made their way to market after competing conventional, high speed, high cost, and rigid silicon electronics. At present, there are different type of printed sensors and display matrices, which have been developed but not being used in stand alone systems.
Thus, there was a need for demonstrating ‘developed printed electronic components’ in such a way, that they are integrated with other core electronic circuits like embedded systems, to assure their ability to replace individual conventional component.
In the thesis, some experiments were conducted to drive printed electronic components while overlooking their manufacturing details; i.e., the circuit used to drive the printed components was not a part of printed technology (e.g., printed processing, memory units), rather a conventional system (e.g., microcontroller and microprocessor boards available in market) is used. Particularly for this project the printed components are meant to be capacitive sensor matrix, resistive touch screen, organic light emitting diodes (OLED) matrix, electrophoretic display matrix, and electrochromic display matrix. These components were interfaced using embedded system in such a way that they can be driven meaningfully e.g., resistive touch screen can control display option for OLED matrix.
Embedded Linux has significant advantages over previously used OS and non-OS based solutions as it is robust, scalable, and manage resources efficiently. Such a system with backbone of Linux processing was a part of design, which handled a separately designed interface board capable of interfacing 13 capacitive sensor (maximum 8 pF) inputs, a four wire resistive touch screen (with few hundred ohm resistance between terminals), a current driver with 50 mA segment current for 10 x 10 display matrix and voltage range from 0 to 5 V, voltage driver for two led segments capable of dissipate 40 mA at 5 V, finally a voltage driver for separate 10 led segments capable of dissipating 40 mA from 0 to 15 V or a 10 x 10 display matrix with power rating of maximum 16.9 mA at 0 to 15V.
So, in this way different displays or individual led segments can be interfaced with a system which can download their display configuration from HTTP client based user interface, and upload the capacitive sensor and resistive touch screen readings back to user. The device was capable of changing demonstration parameters e.g., blinking, animation for displays via user interface, and program structure was kept convertible so that minor changes can create completely new demonstration: interfacing different components. Design included a power board capable of providing stable 1A supply current at 5V. A Current-Voltage (I-V) characterizing board was part of design which can measure I-V curve of printed solar cells. Printed electronic components were interfaced with embedded systems without much problem, making one comfortable in conclusion that these individual components are ready to replace conventional components in non-standalone systems at-least.
6
Borgviken, Jonathan, und Carl Johansson. „Industrial Wireless IPv6 Sensor device“. Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-34803.
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Matthews, Jonathan Martin. „An embedded device for real-time noninvasive intracranial pressure estimation“. Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/105974.
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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2016.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 (pages 69-70).
Monitoring of intracranial pressure (ICP) is key in many neurological conditions for diagnosis and guiding therapy. Current monitoring methods are highly invasive, limiting their use to the most critically ill patients. Based on a previously developed approach to noninvasive ICP estimation from cerebral blood flow velocity (CBFV) and arterial blood pressure (ABP) waveforms, I have implemented the algorithm on an embedded device (LPC4337 microcontroller) that can produce real-time estimates of ICP from noninvasively-obtained ABP and CBFV measurements. I have also fabricated a medical device prototype complete with peripheral interfaces for ABP and CBFV monitoring hardware and display and recording functionality for clinical use and post-acquisition analysis. The current device produces a mean estimate of ICP once per minute and can perform the necessary computations in 410 ms, on average. Real-time estimates of noninvasive ICP differed from the original batch-mode MATLAB implementation of the algorithm by 0.34 mmHg (RMSE). The contributions of this thesis take a step toward the goal of real-time noninvasive ICP estimation in a variety of clinical settings.
by Jonathan Martin Matthews.
M. Eng.
8
Sanders, Benjamin W. (Benjamin Wesley) 1977. „Evaluation of software tools for the development of an embedded medical device“. Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/86487.
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9
Fuest, Marie. „Active Electrokinetic Transport Control in a Nanofluidic Device with Embedded Surface Electrodes“. The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449484271.
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10
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.
11
Hannay, Peter. „A non-device specific framework for the development of forensic locational data analysis procedure for consumer grade small and embedded devices“. Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2017. https://ro.ecu.edu.au/theses/2026.
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Portable and wearable computing devices such as smart watches, navigation units, mobile phones, and tablet computers commonly ship with Global Navigation Satellite System (GNSS) supported locational awareness. Locational functionality is no longer limited to navigation specific devices such as satellite navigation devices and location tracking systems. Instead the use of these technologies has extended to become secondary functionality on many devices, including mobile phones, cameras, portable computers, and video game consoles. The increase in use of location aware technology is of use to forensic investigators as it has the potential to provide historic locational information. The evidentiary value of these devices to forensic investigators is currently limited due to the lack of available forensic tools and published methods to properly acquire and analyse these data sources. This research addresses this issue through the synthesis of common processes for the development of forensic procedure to acquire and interpret historic locational data from embedded, locationally aware devices.
The research undertaken provides a framework for the generation of forensic procedure to enable the forensic extraction of historical locational data. The framework is device agnostic, relying instead on differential analysis and structured testing to produce a validated method for the extraction of locational history. This framework was evaluated against five devices, selected on a basis of market penetration, availability and a stage
of deduplication.
The examination of the framework took place in a laboratory developed specifically for the research. This laboratory replicates all identified sources of location data for the devices selected. In this case the laboratory is able to simulate cellular (2G and 3G), GNSS (NAVSTAR and GLONASS), and Wi-Fi locationing services. The laboratory is a closed-sky facility, meaning that the laboratory is contained within a faraday cage and all signals are produced and broadcast internally.
Each selected device was run through a series of simulations. These simulations involved the broadcast of signals, replicating the travel of a specific path. Control data was established through the use of appropriate data recording systems, for each of the simulated location signals. On completion of the simulation, each device was forensically acquired and analysed in accordance with the proposed framework.
For each experiment carried out against the five devices, the control and experimental data were compared. In this examination any divergence less than those expected for GNSS were ignored. Any divergence greater than this was examined to establish cause.
Predictable divergence was accepted and non-predictable divergence would have been noted as a limitation. In all instances where data was recovered, all divergences were found to be predictable.
Post analysis, the research found that the proposed framework was successful in producing locational forensic procedure in a non-device specific manner. This success was confirmed for all the devices tested.
12
Kroch, Rudolph C. „Development of a low-cost vibration protection device for industrial gearboxes“. Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/45958.
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A market for a low-cost vibration protection device in the rotating machine industry has been identified that satisfies the needs of small firms unable to afford and sustain a condition monitoring operation.
In this project, a system is developed that satisfies the need for a low-cost, conservative, configurable and intuitive device that can perform vibration measurements on a range of gearboxes and make an inference as to the level of vibrations coming from the bearings on the shafts.
The inference made by the device, derived from the frequency content of the measured signal, may be used by the operator of the gearbox to make a judgment of whether to have the gearbox investigated by a competent authority. In order to assist this investigation, a vibration history of the device is stored, both in time and frequency domain formats, as well as a full history of the relevant diagnostic information.
To reach this point of maturity, the project evolved through three different hardware configurations. The various iterations were tested within the scope for which they were designed and the lessons learned after each test was incorporated into the next iteration. The final iteration incorporated all the refinements of the system up to that point as well as the anticipated scope of further development into the commercial realm.
To verify the inference credibility of the device, the results of the final specification of the device was evaluated against data obtained from the condition monitoring department of SASOL in Secunda. The results were analysed on two accounts. Firstly the signal reproduction accuracy was evaluated, which established how accurately the signal was digitized and how the processing algorithms performed. Secondly, the inference accuracy was gauged against the practices of SASOL. On both accounts, the final device performed satisfactorily.
The end result of this project is considered a ‘near-commercial ready’ prototype with all the hardware on-board for user interaction, signal processing, 3rd party viewing of the data and future expandability.Dissertation (MEng)--University of Pretoria, 2014.
tm2015
Mechanical and Aeronautical Engineering
MEng
Unrestricted
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Jacobsen, Andrés Pohlenz. „Development of Steel Slit Wall Dampers with Embedded Condition Assessment Capabilities“. 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/131887.
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Kliem, Andreas [Verfasser], Odej [Akademischer Betreuer] Kao, Thomas [Akademischer Betreuer] Magedanz und Andreas [Akademischer Betreuer] Polze. „Cooperative Device Cloud : provisioning embedded devices in ubiquitous environments / Andreas Kliem. Gutachter: Odej Kao ; Thomas Magedanz ; Andreas Polze. Betreuer: Odej Kao“. Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1073584127/34.
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Setiawan, Stanley. „Design and Tests of a Biofeedback Based Weight Bearing Rehabilitation Device“. Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-262866.
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As upper-limb rehabilitation devices development continue to grow, lower limb rehabilitation devices have limited development. Thus a device that measures weight bearing of heel and forefoot during gait and also produces auditory feedback at certain thresholds were made in this project. The device was constructed based on an ARM-Core microcontroller and was supported by 5 force sensing resistor sensors for each foot. Communications between the modules and the computer as the GUI were established using an UART interface. For testing, sensors were placed beneath the foot using a stretchable cloth so each different subjects’ pressure points were correctly placed. The biofeedback used for this device was by enabling a buzzer and LED embedded to the designed board that turns on when heel strike or push off reached acertain threshold. Testing were divided into phase one and two. From phase one, it was concluded that both push off and heel strike event can have a reading exceeding 8.5% of the body weight. It was then used as a threshold for the biofeedback event. During the biofeedback tests, improvements in the subjects’ walking pattern and reading were noted. Results suggest that biofeedback can change the behavior of the subject.I takt med att utvecklingen av rehabilitationsapparater i övre extremiteterna fortsätter att växa, har rehabiliteringsanordningar för nedre extremiteterna begränsad utveckling. Således gjordes en anordning som mäter viktbearbetning av häl och framfot under gång och också ger hörselåterkoppling vid vissa trösklar i detta projekt. Enheten var konstruerad baserad på en ARM-Core mikrokontroller och stöds av 5 kraftsavkännande motståndssensorer för varje fot. Kommunikation mellan modulerna och datorn som GUI upprättades medhjälp av ett UART-gränssnitt. För testning placerades sensorer under foten meden töjbar duk så att varje olika försöks tryckpunkter placerades korrekt. Den biofeedback som användes för den här enheten var genom att aktivera en summer och LED inbäddad i det konstruerade kortet som slås på när hälslaget eller skjutstoppet nådde en viss tröskel. Testningen delades in i fas en och två. Frånfas ett drogs slutsatsen att både push off och hälstreffhändelse kan ha en avläsningsom överstiger 8.5% av kroppsvikt. Den användes sedan som en tröskelför biofeedback-händelsen. Under biofeedback-testen noterades förbättringar i försökspersonernas gångmönster och läsning. Resultaten tyder på att biofeedback kan förändra beteendet hos ämnet.
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Cintura, Manuel. „An Embedded Data Logger for In-Vehicle Testing“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23841/.
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This thesis describes an embedded data logger project, composed of software part (in C++ language) and hardware part (Raspberry Pi). It is illustrated the whole procedure from the start of the project with requirements to the end with the experimental results and validation phase. The device is able to acquire, in a synchronous way, videos, CAN and Serial logs from the vehicle under test.
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Elkeelany, Omar S. A. Chaudhry Ghulam M. „A low-power embedded system design and synthesis of remotely programmable direct connect device core“. Diss., UMK access, 2004.
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Thesis (Ph. D.)--School of Computing and Engineering. University of Missouri--Kansas City, 2004.Typescript. "A dissertation in engineering and telecommunication networking." Advisor: Ghulam M. Chaudhry. Vita. Title from "catalog record" of the print edition Description based on contents viewed Feb. 23, 2006. Includes bibliographical references (leaves 150-158) and index. Online version of the print edition.
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Castelli, Jonathan. „Design and validation of innovative integrated circuits and embedded systems for neurostimulation applications“. Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0812/document.
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La bioélectronique est un domaine interdisciplinaire qui étudie les interconnexions et les interactions entre entités biologiques (cellules, tissus, organes) et systèmes électroniques,par l’intermédiaire du transducteur adéquat. Pour des cellules ou des tissus excitables (neurones, muscles, ...), le transducteur prend la forme d’une simple électrode, car ces tissus produisent une activité électrique spontanée ou, dans le sens inverse, peuvent être excités par un signal électrique externe. Cette communication bidirectionnelle donne lieu à deux schémas expérimentaux : l’acquisition et la stimulation. L’acquisition consiste à enregistrer, traiter et analyser les bio-signaux alors que la stimulation consiste à appliquer le courant électrique adéquat aux tissus vivants, pour déclencher une réaction. Cette thèse se concentre sur ce dernier point : deux générations de système de stimulation ont été développées, chacune basée sur un circuit intégré spécifique et adaptée à différents contextes applicatifs.Tout d’abord, le cadre scientifique a été celui du projet CENAVEX, axé sur la stimulation électrique fonctionnelle pour réhabiliter la fonction respiratoire, suite à une lésion de la moelle épinière. Ensuite, les objectifs de conception ont été étendus pour couvrir de nouveaux besoins d’application : la surveillance de l’impédance électrique in situ et l’exploration des formes d’onde de stimulation originales. Le premier pourrait être une solution pour suivre la réaction tissulaire après l’implantation d’une électrode, contribuant ainsi à la biocompatibilité à long terme des implants ; le second propose d’aller au-delà dela conventionnelle impulsion biphasique carrée et d’explorer de nouvelles formes d’ondes qui pourraient être plus efficaces en termes de consommation d’énergie, pour un effet physiologique donné.Le travail présenté dans ce manuscrit contribue à la conception, à la fabrication et au test de dispositifs de stimulation innovants. Cela a conduit au développement de deux circuits intégrés et de deux dispositifs de stimulation permettant une stimulation multicanal.Les caractérisations électriques et les validations biologiques, de la faisabilité in vitro aux expériences in vivo, ont été menées et sont décrites dans ce manuscritBioelectronics is a cross-disciplinary field that studies interconnections and interactions between biological entities (cells, tissues, organs) and electronic systems, using the adequate transducer. For excitable cells or tissues (neurons, muscles, . . . ), the transducer takes the form of a simple electrode, as these tissues produce a spontaneous electrical activity or,in the opposite way, may be excited by an external electrical signal. This bi-directional communication gives rise to two experimental schemes: acquisition and stimulation. Acquisition consists in recording, processing and analyzing bio-signals whereas stimulation consists in applying the adequate electrical current to living tissues in order to trigger a reaction. This thesis focuses on the latter: two generations of stimulation systems have been developed, both being centered on an Application Specific Integrated Circuit, and adapted to different application contexts. First, the scientific framework was given by the CENAVEX project, focusing on Functional Electrical Stimulation to rehabilitate the respiratory function, following a Spinal Cord Injury. Then, the design objectives were extended to cover new application needs:in situ electrical impedance monitoring and exploration of original stimulation wave forms.The first one could be a solution to follow the tissue reaction after electrode implantation,hence contributing to long-term biocompatibility of implants; the second one proposes to go further the conventional constant biphasic pulse and explore new wave forms that couldbe most efficient in terms of energy consumption, for a given physiological effect.The work presented in this manuscript is a contribution to the design, fabrication and test of innovative stimulation devices. It leaded to the development of two integrated circuits and two stimulation devices permitting multichannel stimulation. Both electrical characterizations and biological validations, from in vitro feasibility to in vivo experiments, have been conducted and are described in this manuscript
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Gomes, Humberto Vargas. „Metodologia de projeto de software embarcado voltada ao teste“. reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/27671.
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Devido ao crescente incremento de complexidade do software embarcado atual, dada a abundância de recursos disponíveis de hardware, está cada vez mais difícil manter a qualidade do software embarcado desenvolvido sem incorrer em aumentos de custo que inviabilizem o projeto. Com isto, o teste de software embarcado é atualmente uma importante área de pesquisa, onde são buscadas técnicas de teste que maximizem o número de falhas encontradas ainda em tempo de projeto e a um custo satisfatório. Muitas das soluções pesquisadas envolvem aspectos não apenas relativos ao teste propriamente dito, mas ao projeto do produto desde a sua concepção, daí a necessidade de metodologias conjuntas de desenvolvimento e teste. Neste trabalho, é apresentada uma metodologia de desenvolvimento e testes de software embarcado com o objetivo de permitir que grande parte da tarefa de desenvolvimento e teste seja executada em um ambiente de desenvolvimento de software de aplicação, sem a presença do hardware. Neste ambiente, o desenvolvimento é pensado desde o início do projeto visando à qualidade do teste, assim caracterizando esta metodologia como uma técnica DFT (do inglês design for testability). Na abordagem proposta, o hardware físico é substituído por modelos funcionais, construídos na mesma linguagem de programação do software em desenvolvimento. O uso destes modelos permite ao desenvolvedor a construção e aplicação de casos de teste capazes de exercitar o software embarcado tanto no ambiente de software de aplicação, quanto na plataforma alvo, sem alterações. Esta dissertação mostra a metodologia sendo aplicada ao software embarcado de um medidor eletrônico de energia, onde cinco modelos de dispositivos de hardware foram construídos, que permitiram a execução tanto de testes de unidade, quanto de testes de integração, em um ambiente de desenvolvimento de software de aplicação. Finalmente, uma análise de cobertura, realizada com o auxílio de uma ferramenta que, de outra forma, não seria compatível com o software da plataforma alvo, mostrou que a execução conjunta do software e dos modelos permite atingir a cobertura de quase a totalidade do software embarcado desenvolvido, onde os casos de teste foram capazes de verificar desde as camadas de software de aplicação até as camadas de software dependente do hardware.Due to the growing increment of complexity of the current embedded software, given the abundance of hardware resources, it is becoming increasingly difficult to maintain the software quality without requiring high development and test costs that could make the project impracticable. In this context, embedded software testing is an important research area, where test techniques that maximize the number of errors detected during design time at a satisfactory cost have been investigated. Many of the proposed solutions involve aspects not related only to the testing itself, but to the product design since its conception, hence the need of methodologies for the development and test of software. In this work, we present a methodology of development and test of embedded software that allows the execution of most of the task of development and test in an application software development environment, without the physical hardware. In the application software environment, the development is thought, since the first stages, aiming the execution of the test, hence this methodology can be seen as a DFT (design for testability) technique. In the proposed approach, the physical hardware is replaced by functional models, constructed using the same programming language of the embedded software under development. The use of such models allows the developer to construct and apply test cases capable of exercising the embedded software both in the application software environment and in the target platform environment, without any change. In this work, the presented methodology is applied to the embedded software of an electronic energy meter, where five hardware device models were constructed, which enabled the execution of both unit and integration tests in the application software environment. Finally, the coverage analysis, performed with a software tool that otherwise would not be compatible with the target platform, showed that the simultaneous execution of the software and the models make it possible to achieve an almost complete coverage of the developed embedded software, where the test cases were able to verify the software from the application layers to the hardware dependent layers.
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Zerhusen, Benjamin. „Third Generation Point-of-Care Device for Quantification of Zinc in Blood Serum“. University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504787278462965.
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Amiri, Atila. „ST. JUDE MEDICAL: AN OBJECT-ORIENTED SOFTWARE ARCHITECTURE FOR EMBEDDED AND REAL-TIME MEDICAL DEVICES“. DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/374.
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Medical devices used for surgical or therapeutic purposes require a high degree of safety and effectiveness. Software is critical component of many such medical devices. The software architecture of a system defines organizational structure and the runtime characteristic of the application used to control the operation of the system and provides a set of frameworks that are used to develop that. As such, the design of software architecture is a critical element in achieving the intended functionality, performance, and safety requirements of a medical device. This architecture uses object-oriented design techniques, which model the underlying system as a set of objects that interact to achieve their goals. The architecture includes a number of frameworks comprised of a set of classes that can be extended to achieve different functionality required for a medical device. The Input/ Output (IO) framework includes a number of core classes that implement periodic and a periodic input output with varying priority requirements, provides a hardware neutral interface to the application logic, and a set of classes that can be extended to both meet the hardware IO specifics of a target platform and create new sensor and actuator types for client applications. The Devices framework provides a blueprint to develop the controller logic of the medical device in terms of abstractions that parallel the hardware components of the medical device. The Configuration framework allows creation and configuration of a medical device from an XML (Extensible Markup Specification) specification that specifies the configuration of the device based on abstract factories that can be extended to meet requirements of a specific medical device. The Controller is the component of the architecture that defines classes that implement reception of commands from and transmission of status and data to a local or remote client and dictate the structure of threads, thread priorities and policies for this purpose. The Diagnostics package of the architecture defines a framework for developing components that monitor the health of the system and detect emergency conditions. The architecture is implemented in C++ and runs on a real-time LINUX operating system. At this time, the architecture is used in development of two of the St. Jude Medical Atrial Fibrillation Division’s medical devices; one of these has FDA class III and the other class II classification.
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Kamineni, Surya Bharat. „Experimental Analysis on the Feasibility of Voice Based Symmetric Key Generation for Embedded Devices“. Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6874.
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In this thesis, we present results of an experimental study in order to generate a secure cryptographic key from the user’s voice which is to be shared between two mobile devices. We identified two security threats related to this problem, discussed the challenges to design the key generation/sharing mechanism, and proposed a new protocol based on bloom filters that overcomes the two main attacks by the intruder. One is when the attacker places its device in the close vicinity of the location where the user attempts to generate/share the key in order to derive the key from eavesdropping on communication messages. The second is when the attacker visually observes the experiment being performed and it tries to replicate the same experiment to reproduce the key. We present several results that demonstrate the practicality of our proposed technique in the context of communications between smart-phone
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Alzoubi, Khawla Ali. „NANO-ELECTRO-MECHANICAL SWITCH (NEMS) FOR ULTRA-LOW POWER PORTABLE EMBEDDED SYSTEM APPLICATIONS: ANALYSIS, DESIGN, MODELING, AND CIRCUIT SIMULATION“. Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1278511770.
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Olsson, Jakob. „Measuring the Technical and Process Benefits of Test Automation based on Machine Learning in an Embedded Device“. Thesis, KTH, Programvaruteknik och datorsystem, SCS, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231785.
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Learning-based testing is a testing paradigm that combines model-based testing with machine learning algorithms to automate the modeling of the SUT, test case generation, test case execution and verdict construction. A tool that implements LBT been developed at the CSC school at KTH called LBTest. LBTest utilizes machine learning algorithms with off-the-shelf equivalence- and model-checkers, and the modeling of user requirements by propositional linear temporal logic. In this study, it is be investigated whether LBT may be suitable for testing a micro bus architecture within an embedded telecommunication device. Furthermore ideas to further automate the testing process by designing a data model to automate user requirement generation are explored.Inlärningsbaserad testning är en testningsparadigm som kombinerar model-baserad testning med maskininlärningsalgoritmer för att automatisera systemmodellering, testfallsgenering, exekvering av tester och utfallsbedömning. Ett verktyg som är byggt på LBT är LBTest, utvecklat på CSC skolan på KTH. LBTest nyttjar maskininlärningsalgoritmer med färdiga ekvivalent- och model-checkers, och modellerar användarkrav med linjär temporal logik. I denna studie undersöks det om det är lämpat att använda LBT för att testa en mikrobus arkitektur inom inbyggda telekommunikationsenheter. Utöver det undersöks även hur testprocessen skulle kunna ytterligare automatiseras med hjälp av en data modell för att automatisera generering av användarkrav.
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Lyn, Kevin G. „Classification of and resilience to cyber-attacks on cyber-physical systems“. Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53926.
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The growing connectivity of cyber-physical systems (CPSes) has led to an increased concern over the ability of cyber-attacks to inflict physical damage. Current cybersecurity measures focus on preventing attacks from penetrating control supervisory networks. These reactive techniques, however, are often plagued with vulnerabilities and zero-day exploits. Embedded processors in CPS field devices often possess little security of their own, and are easily exploited once the network is penetrated. In response, researchers at Georgia Tech and Virginia Tech have proposed a Trustworthy Autonomic Interface Guardian Architecture (TAIGA), which monitors communication between the embedded controller and physical process. This autonomic architecture provides the physical process with a last line of defense against cyber-attacks by switching process control to a trusted backup controller if an attack causes a system specification violation.
This thesis focuses on classifying the effects of cyberattacks on embedded controllers, evaluating TAIGA’s resilience against these attacks, and determining the applicability of TAIGA to other CPSes. This thesis identifies four possible outcomes of a cyber-attack on a CPS embedded processor. We then evaluate TAIGA’s mechanisms to defend against those attack outcomes, and verify TAIGA satisfies the listed trust requirements. Next, we discuss an implementation and the experimental results of TAIGA on a hazardous cargo transportation robot. Then, by making various modifications to the setup configuration, we are able to explore TAIGA’s ability to provide security and process protection to other CPSes with varying levels of autonomy or distributed components.
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Kaur, Navjot. „A service-oriented approach to embedded component-based manufacturing automation“. Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/9445.
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This thesis is focused on the application of Component-Based (CB) technology to shop floor devices using a Service Oriented Architecture (SOA) and Web Services (WS) for the purpose of realising future generation agile manufacturing systems. The environment of manufacturing enterprises is now characterised by frequently changing market demands, time-to-market pressure, continuously emerging new technologies and global competition. Under these circumstances, manufacturing systems need to be agile and automation systems need to support this agility. More specifically, an open, exible automation environment with plug and play connectivity is needed. Technically, this requires the easy connectivity of hardware devices and software components from different vendors. Functionally, there is a need of interoperability and integration of control functions on different hierarchical levels ranging from field level to various higher level applications such as process control and operations management services. A potential solution is to realise a modular and reconfigurable automation system, based on a platform of reusable components; while simultaneously reducing the number of unique components. For designing such reusable components, a component-based technology has been used in current thesis. The automation components created are active and distributed entities interacting through their data, event and service ports. To communicate these entities, this thesis focuses on applying SOA and WS at device level. SOA and WS have already been proven successful in linking business applications. If SOA can be applied at shop floor using the embedded devices, it can enable entirely new automation architecture based on peer-to-peer interactions between autonomous devices. The adoption of this SOA-WS approach at shop floor level would enable a seamless integration of higher level business applications and shop- floor level system. This will also provide a loosely coupled message-oriented service in embedded device networks and geographically distributed automation system. SOA can be implemented using Web Services on the embedded devices, which will provide even greater exibility and interoperability because WS is platform neutral. This SOA-WS approach will enable end users to operate and maintain the supplied system easily. A key aim of this thesis is to examine if the adoption of SOA-WS at the embedded control devices can provide the same level of message speed and reliability as the current control systems. It is expected that the desired distributed, loosely coupled and reconfigurable automation system can be formed by a network of these collaborative autonomous SOA-WS based devices using an open control platform. This approach has been experimentally evaluated both in terms of quantity and quality using various parameters involved in the design, implementation, evaluation and recon guration of SOA-WS based automation systems. This has been done using the Ford Festo test rig located at the Manufacturing System Integration Research Institute of Loughborough University. The mechanisms on this test rig represent control problems typically associated in engine assembly and handling machines. Therefore, the result of experimental studies performed on this test rig can be considered applicable to real manufacturing applications.
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Ren, Xiaoran. „A Wearable Fitness Device System for Multiple Biological Information Data Acquisition for Physically Active Persons“. University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1505209479365329.
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Arbelaez, Morales David Alonso. „Motor controller simulation and embedded implementation for a blood pump“. Thesis, Queensland University of Technology, 2014. https://eprints.qut.edu.au/70252/1/David%20Alonso_Arbelaez%20Morales_Thesis.pdf.
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This study was a step forward in modeling, simulation and microcontroller implementation of a high performance control algorithm for the motor of a blood pump. The rotor angle is sensed using three Hall effect sensors and an algorithm is developed to obtain better angular resolution from the three signals for better discrete-time updates of the controller. The performance of the system was evaluated in terms of actual and reference speeds, stator currents and power consumption over a range of reference speeds up to 4000 revolutions per minute. The use of fewer low cost Hall effect sensors compared to expensive high resolution sensors could reduce the cost of blood pumps for total artificial hearts.
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Larsson, Magnus. „Sanitization of embedded network devices : Investigation of vendor’s factory reset procedure“. Thesis, KTH, Radio Systems Laboratory (RS Lab), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166305.
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Embedded devices such as routers, switches, and firewalls commonly have sensitive information stored on them such as passwords, cryptographic keys, and information about the network around them and services that these device(s) provide. When disposing of or reselling this equipment in the secondary market it is crucial to erase this sensitive information. However, there is an important question that must be asked: Do the erase commands and routines offered by the device manufacturers actually erase the sensitive data? This thesis investigates methods and tools to determine the completeness of this erasure in some common network devices. These methods are used on a sample of networking equipment found to still contain sensitive information after being erased according to vendor recommendations. A computer program was developed to show how this information can be removed. The information in this document is useful for equipment owners, brokers and others looking to remarket their current equipment; all of whom want to minimize the risk of leaking sensitive data to other parties.Nätverksutrustning såsom routrar, switchar och brandväggar har ofta känslig information lagrad internt, som lösenord, kryptografiska nycklar, information om nätverket runt dem samt tjänster de tillhandahåller. Om denna utrustning ska säljas på andrahandsmarkanden eller på annat sätt byta ägare är det viktigt att all känslig information raderas. Men kan man lita på att raderings rutiner och metoder som tillhandahålls av tillverkaren verkligen raderar känslig data? Denna avhandling undersöker lämpliga verktyg och metoder för att granska vilken information som minnen i inbyggda system innehåller. Dessa metoder testas praktiskt på några system som visar sig ha kvar känslig information efter att de raderats enligt tillverkarens rekommendationer. Ett datorprogram som demonstrerar hur denna information kan undersökas och raderas finns med som en del av avhandlingen. Informationen i detta dokument är användbar för ägare av datakomutrustning, mäklare av sådana samt andra som vill minimera risken för att läcka känslig information vid återförsäljning av sin begagnade utrustning.
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Kagerin, Anders, und Michael Karlsson. „Development of a low power hand-held device in a low budget manner“. Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7114.
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The market of portable digital audio players (DAPs) have literally exploded the last couple of years. Other markets has grown as well. PDAs, GPS receivers, mobile phones, and so on. This resulted in more advanced ICs and SoCs becoming publically available, eliminating the need for in-house ASICs, thus enableing smaller actors to enter the markets.
This thesis explores the possibilities of developing a low power, hand-held device on a very limited budget and strict time scale.
This thesis report also covers all the steps taken in the development procedure.
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Frankart, Jeffrey. „Development of a Closed-Loop Force Reduction Mechanism in a Gait Rehabilitation Device“. VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/2921.
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Elliptical trainers are prescribed in rehabilitative exercise but difficult to implement in populations with significant functional gait deficits. Typical elliptical machines do not mimic normal gait and therefore require modifications for clinical rehabilitation. This research builds on previous modifications of an elliptical trainer designed to simulate level-surface walking. This design differed from a commercial version. It included articulated footplates and an electromechanically-driven virtual-cam to control footplate position. Ankle dorsiflexion elicited lower-extremity muscle spasticity which produced an unwanted gait variant during stroke patient testing. Spasticity is a hyperexcitable stretch reflex causing inefficient gait. This project’s purpose was to develop an autonomous cam-profile adjustment to optimize the device’s rehabilitation potential. Foot-to-footplate forces were measured in stroke patients and compared to normative data. Greater than normal forces were considered spastic. An embedded controller was designed to reduce footplate forces via real-time cam-profile attenuation. A simulated spastic dorsiflexion load successfully proved the algorithm’s efficacy.
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Denmark, Daniel Jonwal. „Photopolymerization Synthesis of Magnetic Nanoparticle Embedded Nanogels for Targeted Biotherapeutic Delivery“. Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6827.
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Conventional therapeutic techniques treat the patient by delivering a biotherapeutic to the entire body rather than the target tissue. In the case of chemotherapy, the biotherapeutic is a drug that kills healthy and diseased cells indiscriminately which can lead to undesirable side effects. With targeted delivery, biotherapeutics can be delivered directly to the diseased tissue significantly reducing exposure to otherwise healthy tissue. Typical composite delivery devices are minimally composed of a stimuli responsive polymer, such as poly(N-isopropylacrylamide), allowing for triggered release when heated beyond approximately 32 °C, and magnetic nanoparticles which enable targeting as well as provide a mechanism for stimulus upon alternating magnetic field heating. Although more traditional methods, such as emulsion polymerization, have been used to realize these composite devices, the synthesis is problematic. Poisonous surfactants that are necessary to prevent agglomeration must be removed from the finished polymer, increasing the time and cost of the process. This study seeks to further explore non-toxic, biocompatible, non-residual, photochemical methods of creating stimuli responsive nanogels to advance the targeted biotherapeutic delivery field. Ultraviolet photopolymerization promises to be more efficient, while ensuring safety by using only biocompatible substances. The reactants selected for nanogel fabrication were N-isopropylacrylamide as monomer, methylene bisacrylamide as cross-linker, and Irgacure 2959 as ultraviolet photo-initiator. The superparamagnetic nanoparticles for encapsulation were approximately 10 nm in diameter and composed of magnetite to enable remote delivery and enhanced triggered release properties. Early investigations into the interactions of the polymer and nanoparticles employ a pioneering experimental setup, which allows for coincident turbidimetry and alternating magnetic field heating of an aqueous solution containing both materials. Herein, a low-cost, scalable, and rapid, custom ultraviolet photo-reactor with in-situ, spectroscopic monitoring system is used to observe the synthesis as the sample undergoes photopolymerization. This method also allows in-situ encapsulation of the magnetic nanoparticles simplifying the process. Size characterization of the resulting nanogels was performed by Transmission Electron Microscopy revealing size-tunable nanogel spheres between 50 and 800 nm by varying the ratio and concentration of the reactants. Nano-Tracking Analysis indicates that the nanogels exhibit minimal agglomeration as well as provides a temperature-dependent particle size distribution. Optical characterization utilized Fourier Transform Infrared and Ultraviolet Spectroscopy to confirm successful polymerization. When samples of the nanogels encapsulating magnetic nanoparticles were subjected to an alternating magnetic field a temperature increase was observed indicating that triggered release is possible. Furthermore, a model, based on linear response theory that innovatively utilizes size distribution data, is presented to explain alternating magnetic field heating results. The results presented here will advance targeted biotherapeutic delivery and have a wide range of applications in medical sciences like oncology, gene delivery, cardiology and endocrinology.
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Danielsson, Max, und Thomas Sievert. „Viability of Feature Detection on Sony Xperia Z3 using OpenCL“. Thesis, Blekinge Tekniska Högskola, Institutionen för kreativa teknologier, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-10388.
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Context. Embedded platforms GPUs are reaching a level of perfor-mance comparable to desktop hardware. Therefore it becomes inter-esting to apply Computer Vision techniques to modern smartphones.The platform holds different challenges, as energy use and heat gen-eration can be an issue depending on load distribution on the device. Objectives. We evaluate the viability of a feature detector and de-scriptor on the Xperia Z3. Specifically we evaluate the the pair basedon real-time execution, heat generation and performance. Methods. We implement the feature detection and feature descrip-tor pair Harris-Hessian/FREAK for GPU execution using OpenCL,focusing on embedded platforms. We then study the heat generationof the application, its execution time and compare our method to twoother methods, FAST/BRISK and ORB, to evaluate the vision per-formance. Results. Execution time data for the Xperia Z3 and desktop GeForceGTX660 is presented. Run time temperature values for a run ofnearly an hour are presented with correlating CPU and GPU ac-tivity. Images containing comparison data for BRISK, ORB andHarris-Hessian/FREAK is shown with performance data and discus-sion around notable aspects. Conclusion. Execution times on Xperia Z3 is deemed insufficientfor real-time applications while desktop execution shows that there isfuture potential. Heat generation is not a problem for the implemen-tation. Implementation improvements are discussed to great lengthfor future work. Performance comparisons of Harris-Hessian/FREAKsuggest that the solution is very vulnerable to rotation, but superiorin scale variant images. Generally appears suitable for near duplicatecomparisons, delivering much greater number of keypoints. Finally,insight to OpenCL application development on Android is given
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Olivier, Paul L. R. „Improving Hardware-in-the-loop Dynamic Security Testing For Linux-based Embedded Devices“. Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS049.
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Les techniques d'analyse dynamique ont prouvé leur efficacité dans l'évaluation de la sécurité. Il est en revanche nécessaire de pouvoir exécuter le code à analyser et c'est souvent un défi pour les firmware dont la plupart sont profondément intégrés à l’architecture matérielle du système embarqué. L'émulation permet d’exécuter une grande partie du code mais se retrouve rapidement limitée lorsqu’il est nécessaire d'interagir avec des composants spécialisés. Pour cela, l’approche d'émulation partielle, ou hardware-in-the-loop, offre plusieurs avantages: transférer les accès aux matériels qui sont difficiles à émuler correctement et exécuter le firmware à tour de rôle sur les deux entités. Jusqu'à présent, cette approche a été principalement considérée pour les firmware monolithiques, mais moins pour les dispositifs utilisant des systèmes d'exploitation avancés. Dans cette thèse, nous explorons les défis des tests de sécurité pour les processus exécutés dans un environnement émulé où une partie de leur exécution doit être transmise à leur dispositif physique d'origine. Au travers de cette thèse, nous passons d'abord en revue les différentes techniques d'interception des appels système ainsi que leurs objectifs. Nous discutons des défis des différentes manières d'exécuter un processus dans deux noyaux Linux différents. Nous implémentons au travers d’un framework ces transferts pour un processus Linux avec ses appels système et accès mémoire entre son environnement émulé et son environnement d’origine sur le dispositif physique. Afin de surmonter les défis liés à l'utilisation de dispositifs physiques pour ces tests de sécurité, nous présentons également une nouvelle plateforme pour les tests de sécurité hardware-in-the-loopDynamic analysis techniques have proven their effectiveness in security assessment. Nevertheless, it is necessary to be able to execute the code to be analyzed and this is often a challenge for firmware, most of which are deeply integrated into the hardware architecture of embedded systems. Emulation allows to execute a large part of the code but is quickly limited when it is necessary to interact with specialized components. For this, the partial emulation, or hardware-in-the-loop, approach offers several advantages: transferring access to hardware that is difficult to emulate properly and executing the firmware in turn on both entities. To date, this approach has been considered primarily for monolithic firmware, but less so for devices running advanced operating systems. In this thesis, we explore the challenges of security testing for processes running in an emulated environment where part of their execution must be transmitted to their original physical device. Throughout this thesis, we first review the various techniques for intercepting system calls and their objectives. We highlight the fact that forwarding is not a very well explored technique in depth but is a promising approach for evaluating the security of embedded applications. We discuss the challenges of different ways of running a process in two different Linux kernels. We implement through a framework these transfers for a Linux process with its system calls and memory accesses between its emulated environment and its original environment on the physical device. To overcome the challenges of using physical devices for these security tests, we also present a new test platform to reproduce hardware-in-the-loop security experiments
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Tesfaye, Mussie. „Secure Reprogramming of a Network Connected Device : Securing programmable logic controllers“. Thesis, KTH, Kommunikationssystem, CoS, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104077.
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This is a master’s thesis project entitled “Secure reprogramming of network connected devices”. The thesis begins by providing some background information to enable the reader to understand the current vulnerabilities of network-connected devices, specifically with regard to cyber security and data integrity. Today supervisory control and data acquisition systems utilizing network connected programmable logic controllers are widely used in many industries and critical infrastructures. These network-attached devices have been under increasing attack for some time by malicious attackers (including in some cases possibly government supported efforts). This thesis evaluates currently available solutions to mitigate these attacks. Based upon this evaluation a new solution based on the Trusted Computing Group (TCG’s) Trusted Platform Modules (TPM) specification is proposed. This solution utilizes a lightweight version of TPM and TCG’s Reliable Computing Machine (RCM) to achieve the desired security. The security of the proposed solution is evaluated both theoretically and using a prototype. This evaluation shows that the proposed solution helps to a great extent to mitigate the previously observed vulnerabilities when reprogramming network connected devices. The main result of this thesis project is a secure way of reprogramming these network attached devices so that only a valid user can successfully reprogram the device and no one else can reprogram the device (either to return it to an earlier state, perhaps with a known attack vector, or even worse prevent a valid user from programming the device).Avhandlingen börjar med att ge lite bakgrundsinformation för att läsaren att förstå de nuvarande sårbarheten i nätverksanslutna enheter, särskilt när det gäller IT-säkerhet och dataintegritet. Idag övervakande kontroll och datainsamlingssystem använder nätverksanslutna programmerbara styrsystem används allmänt i många branscher och kritisk infrastruktur. Dessa nätverk anslutna enheter har under ökande attacker under en tid av illvilliga angripare (inklusive i vissa fall eventuellt regeringen stöds insatser). Denna avhandling utvärderar för närvarande tillgängliga lösningar för att minska dessa attacker. Baserat på denna utvärdering en ny lösning baserad på Trusted Computing Group (TCG) Trusted Platform Modules (TPM) specifikation föreslås. Denna lösning använder en lätt version av TPM och TCG:s pålitliga dator (RCM) för att uppnå önskad säkerhet. Säkerheten i den föreslagna lösningen utvärderas både teoretiskt och med hjälp av en prototyp. Utvärderingen visar att den föreslagna lösningen bidrar i stor utsträckning för att minska de tidigare observerade sårbarheter när omprogrammering nätverksanslutna enheter. Huvudresultatet av denna avhandling projektet är ett säkert sätt omprogrammering dessa nätverksanslutna enheter så att endast ett giltigt användarnamn framgångsrikt kan omprogrammera enheten och ingen annan kan programmera enheten (antingen att återställa den till ett tidigare tillstånd, kanske med en känd attack vector, eller ännu värre förhindra en giltig användare från programmering av enheten).
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Xu, Chunchun. „High Accuracy Real-time GPS Synchronized Frequency Measurement Device for Wide-area Power Grid Monitoring“. Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/27007.
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Frequency dynamics is one of the most important signals of a power system, and it is an indicator of imbalance between generation and load in the system. The Internet-based real-time GPS-synchronized wide-area Frequency Monitoring Network (FNET) was proposed to provide imperative frequency dynamics information for a variety of system-wide monitoring, analysis and control applications. The implementation of FNET has for the first time made the synchronized observation of the entire U.S. power network possible with very little cost.
The FNET is comprised of many Frequency Disturbance Recorders (FDR) geographically dispersed throughout the U.S. and an Information Management System (IMS), currently located at Virginia Tech. The FDR works as a sensor, which performs local measurements and transmits calculations of frequency, voltage magnitude and voltage angle to the remote servers via the Internet. Compared with its commercial counterpart Phasor Measurement Unit (PMU), FDR provides less expensive version for networked high-resolution real-time synchronized. The improved single phase algorithm in the FDRs made it possible to measure at 110V level which is much more challenging than PMUs due to the noise involved at this level.
This research work presents the challenges and issues of both software and hardware design for the novel measurement device FDR, which is one of the devices with the highest dynamic precision for power system frequency measurement. The DFT-based Phasor Angle Analysis algorithm has been improved to make sure the high-resolution measuring FDRs are installed at residential voltage outlets, instead of substation high-voltage inputs. An embedded 12-channel timing GPS receiver has been integrated to provide an accurate timing synchronization signal, UTC time stamp, and unit location. This research work also addresses the harmonics, voltage swing and other noise components' impacts on the measurement results, and the optimized design of filters and a coherent sampling scheme to reduce or eliminate those impacts. The verification test results show that the frequency measurement accuracy of the FDR is within +/-0.0005Hz, and the time synchronization error is within +/-500ns with suitable GPS antenna installation. The preliminary research results show the measurement accuracy and real-time performance of the FDR are satisfactory for a variety of FNET applications, such as disturbance identification and event location triangulation.Ph. D.
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Hájek, Zdeněk. „Měřič spotřeby elektrické energie“. Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-236978.
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This thesis describes the designing and development of electricity consumption meter. First of all, a theoretical basis necessary for understanding a physical principle of measured subject is introduced. In the next part a suitable way of measuring in context of embedded devices is being looked for. Some of peripheral devices useful for project are described briefly. Then follows the detailed description of concept, that in the following part transforms to hardware design. Next part documents creation of the fi rmware. By the end of this thesis the project testing is described as well as the resume of gathered knowledge.
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Parhizkar, M. „Preparation of monodisperse microbubbles in a capillary embedded T-junction device and the influence of process control parameters on bubble size and stability“. Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1437076/.
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The main goal for this work was to produce microbubbles for a wide range of applications with sizes ranging between 10 to 300 μm in a capillary embedded T-junction device. Initially the bubble formation process was characterized and the factors that affected the bubble size; in particular the parameters that reduce it were determined. In this work, a polydimethylsiloxane (PDMS) block (100 x 100 x 10 mm3) was used, in which the T-shaped junction was created by embedded capillaries of fixed outer diameter. The effect of the inner diameter was investigated by varying all the inlet and outlet capillaries’ inner diameter at different stages. In addition, the effect of changes in the continuous phase viscosity and flow rate (Ql) as well as the gas pressure (Pg) on the resulting bubble size was studied. Aqueous glycerol solutions were chosen for the liquid phase, as they are widely used in experimental studies of flow phenomena and provide a simple method of varying properties through dilution. In addition, the viscosity could be varied without significantly changing the surface tension and density of the solutions. The experimental data were then compared with empirical data derived from scaling models proposed in literature, which is widely used and accepted as a basis of comparison among investigators. While the role of liquid viscosity was investigated by these authors, it was not directly incorporated in the scaling models proposed and therefore the effect of viscosity was also studied experimentally. It was found that bubble formation was influenced by both the ratio of liquid to gas flow rate and the capillary number. Furthermore, the effect of various surfactant types and concentrations on the bubble formation and stability were investigated. Preliminary studies with the current T-junction set-up indicated that producing microbubbles with size ranging from 50-300 μm was achievable. Subsequently, the study progressed to optimise the junction to produce smaller bubbles (~ 20 μm) by directly introducing an electric field to the T-junction set-up and assisting the bubble breakup with the combination of microfluidic and electrohydrodynamic focusing techniques. Finally, in this thesis, a novel method that combines microfluidics with electrohydrodynamic (EHD) processing to produce porous BSA scaffolds from microbubble templates with functional particles and/or fibres incorporated into the scaffolds’ structure is presented.
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Zaccherini, Alex. „Horse360: Progettazione e Sviluppo di un Sistema per il Monitoraggio dello Stato di Salute dei Cavalli“. Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23233/.
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Horse360 è un prototipo di un Sistema che permette di tenere traccia dello stato di salute di un cavallo, monitorandone alcuni dati biometrici e consentendo al suo proprietario un maggiore controllo sullo stesso. Il sistema si articola in un dispositivo wearable, un supporto da installare all'interno del box dell'animale, un server ed un'applicazione mobile che consente all'utente la visualizzazione dei dati raccolti.
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AIASSA, SIMONE. „Smart Electronic Pen for Continuous Monitoring of Anaesthetics“. Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2942124.
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Liau, Wei-Tso, und 廖尉佐. „Embedded Wireless Multimedia Display Device“. Thesis, 2006. http://ndltd.ncl.edu.tw/handle/05749943034111997260.
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碩士國立臺灣海洋大學
電機工程學系
94
Abstract Digital Signage is controlled through cables in a traditional way. While playing new materials, users have to change the videos on a PC console. Advertising boards often locate on the bottom of a building or on the high way side in order to attract people’s sights. Those places are dangerous for people while maintaining the advertising board. In this thesis we implement an embedded system adopting wireless technology to transfer multimedia materials for advertising boards. We implement IEEE 802.11b based on Xscale microcontroller to receive files via wireless network. The advantage of our design helps to reduce the cost while setting up the cable lines and benefits users while changing the multimedia contents on an adverting board. With streaming technology, the wireless multimedia display device may be able to receive the multimedia far away through wireless network and show which to play on a large scale displaying outdoor. Digital signage which applys our device may be used in hospitals, markets and MRTs as well as other main traffic transportations.
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Lin, Yu-Hsuan, und 林育萱. „Planting System Based on Embedded Device“. Thesis, 2019. http://ndltd.ncl.edu.tw/handle/x22w3c.
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碩士國立臺灣科技大學
電子工程系
107
With the advancement of technology, today’s Internet of Things is booming. Devices that can connect to the Internet are not just personal computers and mobile phones. They are extended to daily in life. More and more items become more intelligent. Internet access has made a major difference in people’s lives compared to the past, making it easier and more convenient for us to do many things. The pace of society is accelerating. People in today’s society pursue comfort and efficiency. Diet focuses on food safety. There are too many external uncertainties, which make people start to grow indoors, whether it is decorative flowers at home or greenhouse fruits and vegetables. There are not so many times for modern people to take care of plants, and farmers who want to grow crops more efficiently. So design a system to solve this problem. Based on smart planting, the thesis uses Internet of Things chip to design a planting system. Users can instantly view the device status and parameters through the mobile phone, use the remote monitoring and human-machine interface design to make appropriate adjustments when there are abnormal conditions, so that the traditional planting method can be intelligent.
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Shen, Hong-Yi, und 沈宏益. „Implementation of Bluetooth Device in Embedded System“. Thesis, 2008. http://ndltd.ncl.edu.tw/handle/15998965023600200823.
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碩士國立臺灣科技大學
電子工程系
96
The title of this thesis is Implementation of Bluetooth Device in Embedded System. We will eastalish the inquiry, pairing and authentication of bluetooth in the embedded system. The hardware equipment is CoAsia C343 development platform that includes CPU for Samsung S3C2443. The software designed OS is for Windows CE, IDE is Platform Builder 5.0 and Embedded Visual C++ 4.0. In Windows CE, it provides a Bluetooth HCI Extension Layer, Winsock funcutions and virtual ports that enables you to extend the base stack functionality. MSDN provides abundant, systematic libraries no matter which one APIs is used. The developers only need to understand that how to use the functions in the libraries and enhancing theory. That could economize on much time.
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Yeh, Sheng-Chun, und 葉盛群. „Driver Fatigue Detection via Embedded Handheld Device“. Thesis, 2015. http://ndltd.ncl.edu.tw/handle/40966415970636595438.
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碩士國立臺北教育大學
資訊科學系碩士班
103
In recent years, handheld devices, likes tablet and mobile phone are becoming more and more popular. The camera device bundled in these handed devices were also used for many purposes. For example, camera still, and camera recording, automatically detecting human faces is becoming a very valuable task in various applications. In this thesis, we propose a novel method for the driver fatigue detection, to base on the eyes behavior to determine whether the driver is fatigued in driving the car. First of all, the system gets the preview image from the driver via the YUV color space. Then have the color correction and find out the correct skin area to get the human face area, based on the face to find out the eyes areas via the gray convertor, and base on the basis of image binarization processing method to determine whether the driver is fatigued or not.
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Chang, Chia-hsiu, und 張嘉修. „SD Storage Device Based on Embedded Linux System“. Thesis, 2008. http://ndltd.ncl.edu.tw/handle/66168047343223101720.
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碩士國立臺灣科技大學
電子工程系
96
This thesis is compiled for the use of SD card driver under embedded Linux system, making accurate data storage of information, documents, images and sounds… etc. It is hoped that we can not only read and write SD memory card, can also use SDIO for multi-media applications. The hardware platform used is C340 by CoAsia Microelectronics Corp. with Samsung s3c2440 processor. The operation system is open Linux 2.6.24.3, which has been debuged and updated for some period of time, it is a very stable version.
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Wu, Chiao-Lin, und 吳巧琳. „A DRM Switchable System with Embedded Device Implementation“. Thesis, 2007. http://ndltd.ncl.edu.tw/handle/67169376043380599275.
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碩士國立交通大學
電子工程系所
95
Digital Rights Management (DRM) is a concept for controlling the distribution and consumption of digital media. As embedded multimedia devices are becoming popular, there are strong demands for the light-weight DRM systems that can run smoothly in a resource-limited environment. Because implementing the DRM in the embedded device becomes a trend, many companies create their private DRM on their device. However, this phenomenon causes the problem of interoperability between different DRM systems. In addition, from the consumer viewpoint, users can not use all kinds of DRM system on the same device. This is inconvenient for users. In this thesis, we propose a switchable DRM system to achieve the usage of different DRM systems on the same device. Before we design a switchable DRM system, we must understand the feature of the platform and analyze the structure of some DRM systems. After understanding them, we find an optimum integration of the platform and one DRM system. Then, we based on the designed DRM system to propose the concept of the DRM switchable design. We design an universal DRM module loader. This loader checks the validity of a loadable DRM module, and it defers all the other DRM tasks to the loaded module. This system integrates the concept of downloadable tools and the OMA architecture to provide a balance between flexibility and complexity. We also implement the mechanism on an embedded evaluation board to demonstrate its feasibility.
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Tung, Kuang-Yi, und 董光益. „Positioning Alert Device – The Research of Android Embedded System“. Thesis, 2013. http://ndltd.ncl.edu.tw/handle/ec336j.
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碩士正修科技大學
資訊工程研究所
101
The utilization in embedded system was raised rapidly after the invention of smartphone creation. Till 2012, the number of smartphone was released over 700 million already. Today the embedded system also extensive be used even the microcontroller to the portable cell phone, it’s almost inseparable from life. With the rise of embedded systems, the various types of development boards began to sell in the market, these development boards more support for peripheral circuits or Smartphone model that attracting developers bought for learning and applications. Supplier of boards will provided the porting system and drivers support at first, but the operating system or software are evolving continuously, the board's operating system also be changed, from the WinCE or Linux Embedded in early years to the current Android, the supplier of development board usually update and porting newest operation system when the new version release. However, these porting and updates of incompleteness are brought in the process, cause of the user have difficulty in limited development and extended custom device. This paper will use Real6410 board to implements positioning alert device and analyses the overall development process in detail. The applications will be created positioning function which according to the positioning of the situation, changing the LED on the board as the positioning status.
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Su, Chien-Chang, und 蘇建璋. „Development of embedded high pressure pipe pressure monitoring device“. Thesis, 2017. http://ndltd.ncl.edu.tw/handle/dh33t6.
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碩士國立高雄第一科技大學
機械與自動化工程系碩士專班
105
Pipeing engineering system is an indispensable system in heavy industry, when the rise of the industrial age, and the piping systems are also being used in a variety of environments with the progress of the times. Kaohsiung gas explosion event was a big hit in 2014, and this incident was reminded that mass society and related using pipeline companies began to focus on the issue of pipeline system monitoring. These diverse and complex pipelines are quite common in the environment of our lives, but the industrial safety should not be sacrificed , and the cause is expensive and technically inadequate because the factor of pipeline placement distance, location, environment and price are limited in the relevant monitoring technology. Most importantly, these industrial accidents occur on residents who live in the neighborhood, not the employees of the factory. This study be proposed a development of embedded high pressure pipe pressure monitoring device for non-direct contact the substance that is transported inside the pipe, and in order to better improve the entire experimental content for complete the entire experimental topic content, and then related professional reference documents of relevant pressure monitoring components, strain gauge, single board computer and Tee be used in this paper and entire actual experimental process. These independent elements are combined for experimentation in the experimental process. During the experiment, we encountered the problem that the strain value cannot be read by the board computer, so we joined the high level ADC Chip to improve reading problems. This experimental task is complicated because the resistance change of the strain gauge is small, so this is a very important lesson to establish appropriate circuits to detect minor changes and signal amplification processing. The content of this paper is an embedded high pressure pipe pressure device, and that be developed to measure the properties of the object strain on different occasions with strain gauge, a selected function Arduino SBC and add ADC, and WIFI module, and then we use the effective and a reasonable cost way for multi-point pressure monitoring in the pipeline. First, we use the ANSYS Finite element analysis to perform a simulation analysis on pipe fittings, for example we use single plate and a quarter of a bridge on the pipe in the experimental parameters 1, and plus 1 a non-action 1/4 bridge compensation resistor and a 1/2 bridge compensation resistor to complete the Wheatstone bridge, and then we through the NI9237 module to obtain the strain value and analysis data for comparison to verify the feasibility of the experimental method. Finally, the strain gauge and single-board computer module are composed to analyze with 16 ~ 24bit (ADC), and we through WIFI sent the information to the computer or the cloud to achieve immediate monitoring and networking effects.
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Liu, Tsung-pay, und 劉宗佩. „Embedded device design and implementation of Ethernetto 1553B interface“. Thesis, 2014. http://ndltd.ncl.edu.tw/handle/89146538271314622553.
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碩士國立臺灣海洋大學
電機工程學系
102
MIL-STD-1553B standard,aircraft internal time division command/response multiplex data bus setting up by U.S. Department of Defense，is a integrity data and Interference immunity of real time network. It has been widely used in various military equipment system untill now. With the development of aviation technology，performance and capacity for data transmission between devices also request to increase gradually. How to introduce new technology and surmount the limitations of the original structures will be important issue in the future. This article is mainly narrative how to design a simple and stable 1553B to Ethernet embedded devices that is strictly necessary conform Airlines System requirement. Since 1553B is a local data network which can't be expanded. Therefore，use of embedded devices through UDP from of ethernet and sent internal data to the remote devices which achieve the purpose of expansion. Software and hardware architecture of 1553B to ethernet embedded devices has been described in this paper in detail. Other，last part of paper also shows the measurement results and analysis of the data conversion and completed the actual testing and verification of two communications network.
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Hung-ChiChang und 張竑琦. „Embedded Multi-Band Antennas for Portable Navigation Device Application“. Thesis, 2010. http://ndltd.ncl.edu.tw/handle/25817071801426523128.
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碩士國立成功大學
電機工程學系專班
98
In this thesis, the design mainly focuses on the portable navigation device (PND) of signal receiving multi-band antenna, which is embedded into PND. In the industry, many customers require that the antenna radiation efficiency must achieve more than 40%, which become our target to develop GSM/GPRS antennas in this thesis. Three kinds of GSM/GPRS antennas design are presented and discussed in our studies. These antennas can cover GSM900/DCS/PCS/UMTS operation. In the chapter 2, the antenna is designed based on the concept of monopole antenna. Furthermore, the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching. In addition, to raise distance between radiation plane and ground will avoid capacitative effect effectually. In the chapter 3, the antenna is designed based on the concept of planar inverted-F antenna. Furthermore, that the antenna structure have two radiant paths and coupled each other at tail end to do impedance matching is similar to chapter 2. But there is a difference in them. We can choose the short position to change input impedance at this structure. In the chapter 4, the antenna is designed based on the concept of planar inverted-F antenna which takes coupled-fed. It will produce the first mode and high-order mode near the frequency, 900MHz. The feature of this type is to reduce the volume effectually. This antenna can not only cover GSM900/DCS/PCS/UMTS operation but maintain good radiation efficiency. Finally, we will compare three antennas, and develop procedure with industrial view, and propose the prospect of the GSM/GPRS antenna in PND, as a conclusion.