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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
131

Systém pro správu bezdrátových zobrazovacích modulů s využitím technik získávání energie / System for Management of Wireless Display Modules Using Energy Harvesting Techniques

Veselý, Miroslav January 2021 (has links)
This master thesis is focused on smart display modules and their management. Attention is paid on analysis of the current state with focus on power supply and remote management. The goal of this master thesis is to design and develop a prototype of a wireless display module and management system on the base of gained knowledge. A substantial part of this thesis is also a base station which allows remote access to network with wireless display modules and management.
132

Vestavný systém s komunikačním rozhraním NFC a Wi-Fi / Embedded System with Communication Interface NFC and Wi-Fi

Bugár, Loránt January 2016 (has links)
This master’s thesis deals with communication system design via the NFC and Wi-Fi interface. The thesis has two basic goals. The first goal is to create a device that is capable of storing of data and its subsequent transfer via the NFC interface. The second aim is to utilize this device for measuring various physical variables. The IoT technology is employed to fulfill the aforementioned goal. IoT technology is capable of visualizing data in real time and make them accessible via the Internet. The result of this work is an universal device, that contains the most popular communication interfaces, such as I2C, SPI and that is capable of processing measurement data from digital, analogue, and wireless sensors.
133

Microfibrillated cellulose : Energy-efficient preparation techniques and key properties

Ankerfors, Mikael January 2012 (has links)
This work describes three alternative processes for producing microfibrillated cellulose (MFC) in which pulp fibres are first pre-treated and then homogenized using a high-pressure homogenizer. In one process, fibre cell wall delamination was facilitated with a combined enzymatic and mechanical pre-treatment. In the two other processes, cell wall delamination was facilitated by pre-treatments that introduced anionically charged groups into the fibre wall, by means of either a carboxymethylation reaction or irreversibly attaching carboxymethyl cellulose (CMC) onto the fibres. All three processes are industrially feasible and enable production with low energy consumption. Using these methods, MFC can be produced with an energy consumption of 500–2300 kWh/tonne, which corresponds to a 91–98% reduction in energy consumption from that presented in earlier studies. These materials have been characterized in various ways and it has been demonstrated that the produced MFCs are approximately 5–30 nm wide and up to several microns long. / <p>QC 20120928</p>
134

Popularizing implants : Exploring conditions for eliciting user adoption of digital implants through developers, enthusiasts and users

Ericsson Duffy, Mikael January 2020 (has links)
Digital implants have become a new frontier for body hackers, technology enthusiasts and disruptive innovation developers, who seek to service this technology for themselves and to new users. This thesis has explored conditions for future user adoption of human body augmentation with digital implants. The conditions explored were mainly self-beneficial health optimization through technology, self-quantification or convenience scenarios. Applying Diffusion Of Innovation theory, Value-based Acceptance Model and research through design methods were used. The process consisted of quantitative and qualitative data gathering and analysis, using interviews, surveys and iterative prototyping with evaluation. The results show mixed user attitude towards implant usage, mainly depending on users' need for added benefits, whether the user is a technology enthusiast actively using technology for self-beneficial gain or a casual everyday consumer of technology. Certain conditions could affect adoption of implants into mainstream usage, mainly data privacy, regulation, convenience, self-quantification or health management. In order for implants to succeed as a mainstream technology, there needs to be proper secure infrastructure, easy installation and coordinated services that offer individual benefits of health or convenience, with a high consumer confidence in supported services, installation / removal and devices. Several companies are working on offering such a service, in order to evaluate such a proposition, iterative prototypes were created to evaluate a health management scenario as a streamlined consumer service, using a service design blueprint and a related interactive smartphone application prototype.
135

Testrigg för att hantera NFC-taggar och QR-koder

Aljoundi, Ahmad, Abukarsh, Wael January 2022 (has links)
Automatisering av testprocesser är viktigt eftersom manuella tester är komplicerade och tidskrävande. Testarbetet effektiviseras och kvaliteten kan höjas genom att automatisera testprocesserna. Arbetet som beskrivs i det här examensarbetet har utförts på Phoniro AB i Halmstad och syftet med projektet är att identifiera och konstruera en helautomatiserad lösning för skanningen av NFC-taggar och QR-koder. I arbetet konstrueras en mekanisk testrigg som är en lämplig lösning baserat på framtagna krav. För att välja den mest lämpliga mjukvaru- och hårdvaruplattformen för testriggen utifrån kraven användes utvärderingsmatriser. Testriggen består av tre delar, en 3D-modell av testriggen, ett kretskort som är testriggens kontroller och mjukvarudel för att programmera testriggen och integrera den med företagets testramverk. Därefter har testriggen byggts upp, alla delar kopplats ihop och programmerats för att testas mot de krav som ställts upp. Testriggen som har tagits fram är en prototyp som har en stor utvecklingspotential med tanke på framtida utveckling / Automation of test processes is essential because manual tests are complicated and time-consuming. Automating the test processes makes the test work more efficient and increases quality. The work described in this diploma thesis was performed at Phoniro AB in Halmstad, and the purpose of the project is to identify and construct a fully automated solution for the scanning of NFC tags and QR codes. The report describes a design that meets the requirements and needs established for the development models used in the project. A mechanical test rig was constructed as a suitable solution, based on developed requirements during the project. Evaluation matrices were used to select the most suitable software and hardware platforms for the test rig based on the project needs. The test rig consists of a 3D-model, a circuit board, and a software component to program the test rig and integrate it with Phoniro’s test framework. The test rig developed is a prototype with excellent potential for future development.
136

DNA-bevisningens brister : En undersökning av invändningar om sekundäröverföring av DNA-spår och dess genomslagskraft i straffprocessen / The deficiencies of DNA-evidence : A study on objections regarding secondary transfer of DNA-evidence and its effectiveness in the criminal process

Bertlin, Linnéa January 2024 (has links)
A number of people have criticized the fact that courts often over-rely on DNA- evidence and that the shortcomings of DNA-analyses are rarely addressed. One flaw with DNA-analyses is that they cannot distinguish whether the presence of the DNA-trace has been caused by a so-called secondary transfer. Secondary transfer, the occurrence of which has been confirmed by several scientific stud- ies, means that DNA is transferred in two stages via contacts. A transfer of DNA can thus first occur from one person to another, for example by shaking hands, and then from the other person to a material, for example by grabbing a weapon. This poses a risk that DNA from an innocent person can be transferred through another person to a crime scene. A fundamental principle of criminal procedure is that the full burden of proof should be placed on the prosecution. This principle is derived from the presump- tion of innocence in Article 6.2 of the ECHR. As a consequence, the defendant has a right to remain silent throughout the judicial proceedings. Should the de- fendant instead be required to explain some of the circumstances of the case, a burden of proof would fall on the defendant, a so-called burden of explanation. Thus, a requirement that the defendant explain some of the circumstances of the case conflicts with the principle of the prosecutor's full burden of proof. Given the criticism that the courts rarely consider the shortcomings of DNA- evidence, there is a risk that the responsibility falls on the defendant to point out that a secondary transfer of DNA has occurred and to actively work towards convincing the court of his or her innocence. The purpose of the paper is thus to investigate the courts' consideration of these objections from the accused. The question is if a burden of explanation is placed on the accused and whether this is compatible with the presumption of innocence. To fulfill the purpose, an empirical study was conducted in the form of an analysis of 16 district court and appellate court decisions. The results showed that the defendant was imposed a burden of explanation in several cases. An exami- nation of the case law of the ECHR showed that there is, in exceptional cases, a possibility to impose an explanatory burden on the accused. However, the cases in the study were not covered by the exception. In conclusion, the practical ap- plication of the burden of proof is not compatible with the presumption of in- nocence. There is thus a need to educate judges on the complex subject of DNA to draw attention to the drawbacks of the evidence and to correct the false per- ception of DNA evidence as infallible. Furthermore, there is a need for a new precedent from the Supreme Court clarifying how the burden of explanation should be applied in accordance with the ECHR.
137

Aktuální trendy v bezkontaktním placení, přínos Apple a analýza trhu ČR včetně preferencí spotřebitelů / Actual trends in contactless payment, contribution of Apple and analysis of market in the Czech Republic including consumer preferences

Novák, Vladimír January 2016 (has links)
The main objective of this work is to analyze current trends in contactless payments and consequently implement it on the Czech market. On this base this thesis deals with several wearable devices. Furthermore on this base is also working in the application part, where is one of the secondary objectives of the work to determine consumer preferences on the market of the Czech Republic. One of the secondary objectives is create a brief summary of the history of payment cards and within the sociological aspect to find a certain analogy in introducing innovations in the field of payments towards current trends in contactless methods. Within the secondary objectives there are simultaneously defined key assumptions forms of payment for success on the market. The following section focuses on electronic payments. Specifically, it deals with trends in electronic payment services, where for its implementation aren´t required the physical presence of the card or chip. Furthermore there are analyzed alternative paths in the current payment methods, namely peer-to-peer platforms. On these platforms is based shared economy, which also represents an interesting potential for the possible development of payment field. Chapter with alternative methods for cashless is finished by analyzing digital currencies. The hypothesis of this thesis is whether Apple can have an impact on the area of contactless payments and how it can affect the entire sector. Part of the hypothesis is the claim that Apple manages to change the area of contactless payments, such as happenede in the music industry with iTunes and then in the telecommunications industry with a revolutionary iPhone. Potential benefit of Apple is defined by the method of description. Potential contribution of Apple Pay is characterized by logical deduction base on previous relationships. Conclusion is by quantitative research method, namely through the consumer research, assessed consumer preferences in the Czech Repulic and is also evaluated the hypothesis of potential benefits of Apple contactless payments.
138

Negativní aspekty nasazování ICT / Negative aspects of deploying of ICT

Weinsteinová, Adéla January 2013 (has links)
This diploma thesis exmines the negative aspects of using information and communication technologies. The main attention is fosused on virtual reality, especially 3D projection in order to decide wheather the using of it has negative impact on phycal and psychological state of the user or not, which exactly are these impacts and what probably cause them. This first part is dedicated to expain concept and history of ICT, explonation of the multidimensional princip and content of each dimension. The following is determination of which ICT areas are currently struggling in their use with negative effects. Detected list of these areas is reduced to six specific technologies which common user has opportunities to experience. These particular technologies were examined as a form of questionnaire, which resulted in a determination of the most used one, ie virtual reality. Shortly afterwards was conducted an experiment imparting undesirable effects caused by using virtual reality. The other five selected technologies are discussed for the most important negatives with which has to face today. The main finding of this study is the identification the side effects of virtual reality based on different types of technologies which are anaglyf 3D projection, passive 3D projection, active 3D projection and comparing if adverse effects depends on the type. It also includes determining the rate of uptake in virtual reality.
139

Anomaly Detection in RFID Networks

Alkadi, Alaa 01 January 2017 (has links)
Available security standards for RFID networks (e.g. ISO/IEC 29167) are designed to secure individual tag-reader sessions and do not protect against active attacks that could also compromise the system as a whole (e.g. tag cloning or replay attacks). Proper traffic characterization models of the communication within an RFID network can lead to better understanding of operation under “normal” system state conditions and can consequently help identify security breaches not addressed by current standards. This study of RFID traffic characterization considers two piecewise-constant data smoothing techniques, namely Bayesian blocks and Knuth’s algorithms, over time-tagged events and compares them in the context of rate-based anomaly detection. This was accomplished using data from experimental RFID readings and comparing (1) the event counts versus time if using the smoothed curves versus empirical histograms of the raw data and (2) the threshold-dependent alert-rates based on inter-arrival times obtained if using the smoothed curves versus that of the raw data itself. Results indicate that both algorithms adequately model RFID traffic in which inter-event time statistics are stationary but that Bayesian blocks become superior for traffic in which such statistics experience abrupt changes.

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