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Kim, Daeyoung. "Propagation measurements and system design for long-range RF tags." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/13876.
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Magableh, Murad. "A generic architecture for semantic enhanced tagging systems." Thesis, De Montfort University, 2011. http://hdl.handle.net/2086/5172.
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The Social Web, or Web 2.0, has recently gained popularity because of its low cost and ease of use. Social tagging sites (e.g. Flickr and YouTube) offer new principles for end-users to publish and classify their content (data). Tagging systems contain free-keywords (tags) generated by end-users to annotate and categorise data. Lack of semantics is the main drawback in social tagging due to the use of unstructured vocabulary. Therefore, tagging systems suffer from shortcomings such as low precision, lack of collocation, synonymy, multilinguality, and use of shorthands. Consequently, relevant contents are not visible, and thus not retrievable while searching in tag-based systems. On the other hand, the Semantic Web, so-called Web 3.0, provides a rich semantic infrastructure. Ontologies are the key enabling technology for the Semantic Web. Ontologies can be integrated with the Social Web to overcome the lack of semantics in tagging systems. In the work presented in this thesis, we build an architecture to address a number of tagging systems drawbacks. In particular, we make use of the controlled vocabularies presented by ontologies to improve the information retrieval in tag-based systems. Based on the tags provided by the end-users, we introduce the idea of adding “system tags” from semantic, as well as social, resources. The “system tags” are comprehensive and wide-ranging in comparison with the limited “user tags”. The system tags are used to fill the gap between the user tags and the search terms used for searching in the tag-based systems. We restricted the scope of our work to tackle the following tagging systems shortcomings: - The lack of semantic relations between user tags and search terms (e.g. synonymy, hypernymy), - The lack of translation mediums between user tags and search terms (multilinguality), - The lack of context to define the emergent shorthand writing user tags. To address the first shortcoming, we use the WordNet ontology as a semantic lingual resource from where system tags are extracted. For the second shortcoming, we use the MultiWordNet ontology to recognise the cross-languages linkages between different languages. Finally, to address the third shortcoming, we use tag clusters that are obtained from the Social Web to create a context for defining the meaning of shorthand writing tags. A prototype for our architecture was implemented. In the prototype system, we built our own database to host videos that we imported from real tag-based system (YouTube). The user tags associated with these videos were also imported and stored in the database. For each user tag, our algorithm adds a number of system tags that came from either semantic ontologies (WordNet or MultiWordNet), or from tag clusters that are imported from the Flickr website. Therefore, each system tag added to annotate the imported videos has a relationship with one of the user tags on that video. The relationship might be one of the following: synonymy, hypernymy, similar term, related term, translation, or clustering relation. To evaluate the suitability of our proposed system tags, we developed an online environment where participants submit search terms and retrieve two groups of videos to be evaluated. Each group is produced from one distinct type of tags; user tags or system tags. The videos in the two groups are produced from the same database and are evaluated by the same participants in order to have a consistent and reliable evaluation. Since the user tags are used nowadays for searching the real tag-based systems, we consider its efficiency as a criterion (reference) to which we compare the efficiency of the new system tags. In order to compare the relevancy between the search terms and each group of retrieved videos, we carried out a statistical approach. According to Wilcoxon Signed-Rank test, there was no significant difference between using either system tags or user tags. The findings revealed that the use of the system tags in the search is as efficient as the use of the user tags; both types of tags produce different results, but at the same level of relevance to the submitted search terms.
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Holland, William S. "Development of an Indoor Real-time Localization System Using Passive RFID Tags and Artificial Neural Networks." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1249062541.
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Alsharif, Majdah Hussain. "Evaluation and improvement of semantically-enhanced tagging system." Thesis, De Montfort University, 2013. http://hdl.handle.net/2086/11119.
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The Social Web or ‘Web 2.0’ is focused on the interaction and collaboration between web sites users. It is credited for the existence of tagging systems, amongst other things such as blogs and Wikis. Tagging systems like YouTube and Flickr offer their users the simplicity and freedom in creating and sharing their own contents and thus folksonomy is a very active research area where many improvements are presented to overcome existing disadvantages such as the lack of semantic meaning, ambiguity, and inconsistency. TE is a tagging system proposing solutions to the problems of multilingualism, lack of semantic meaning and shorthand writing (which is very common in the social web) through the aid of semantic and social resources. The current research is presenting an addition to the TE system in the form of an embedded stemming component to provide a solution to the different lexical form problems. Prior to this, the TE system had to be explored thoroughly and then its efficiency had to be determined in order to decide on the practicality of embedding any additional components as enhancements to the performance. Deciding on this involved analysing the algorithm efficiency using an analytical approach to determine its time and space complexity. The TE had a time growth rate of O (N²) which is polynomial, thus the algorithm is considered efficient. Nonetheless, recommended modifications like patch SQL execution can improve this. Regarding space complexity, the number of tags per photo represents the problem size which, if it grows, will increase linearly the required memory space. Based on the findings above, the TE system is re-implemented on Flickr instead of YouTube, because of a recent YouTube restriction, which is of greater benefit in multi languages tagging system since the language barrier is meaningless in this case. The re-implementation is achieved using ‘flickrj’ (Java Interface for Flickr APIs). Next, the stemming component is added to perform tags normalisation prior to the ontologies querying. The component is embedded using the Java encoding of the porter 2 stemmer which support many languages including Italian. The impact of the stemming component on the performance of the TE system in terms of the size of the index table and the number of retrieved results is investigated using an experiment that showed a reduction of 48% in the size of the index table. This also means that search queries have less system tags to compare them against the search keywords and this can speed up the search. Furthermore, the experiment runs similar search trails on two versions of the TE systems one without the stemming component and the other with the stemming component and found out that the latter produced more results on the conditions of working with valid words and valid stems. The embedding of the stemming component in the new TE system has lessened the effect of the storage overhead needed for the generated system tags by their reduction for the size of the index table which make the system suited for many applications such as text classification, summarization, email filtering, machine translation…etc.
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Liu, Yi. "An evaluation system for intelligent smart badges." Thesis, University of Canterbury. Computer Science and Software Engineering, 2006. http://hdl.handle.net/10092/1111.
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In this thesis we develop and test a software algorithm for an electronic smart badge system. The smart badge system we have developed has the ability to figure out the interests of people who wear the badge by using time and position information collected by the badge. The badge can also present feedback to the wearer, so that users may be guided to people will similar interests and so may have more effective conversations. The smart badge system is based on an inference system which uses a Bayesian network. Evaluation of the system was challenging because there were no completed badges that could be used. To overcome this, we developed a simulation of crowd behaviour in a conference setting. We tuned the parameters of the model using several test situations and the final simulated behavior appeared realistic. Compared to other smart badge systems, our work is unique because it is able to enhance conversation by the real time inference of common ideas or interests of the conversion participants.
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Zancanaro, Mario Antônio. "Identification des éléments RFID mobiles dans les environnements intérieurs associant la couche application et la couche physique." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066730.
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Les recherches autours la localisation d’étiquettes RFID dans des environnements intérieurs (indoor) ont suggéré plusieurs algorithmes et techniques. Identifier des étiquettes RFID dans les environnements intérieurs avec une parfaite précision n’est pas une tâche facile pour de nombreuses applications dans l'industrie, les supermarchés ou encore dans la logistique. Les systèmes de localisation RFID ont évolué en raison de l’augmentation de la popularité des applications qui nécessitent ce type de ressource. En effet, de nombreux procédés ont manifesté le besoin d'identifier et de localiser des étiquettes RFID en mouvement pour des raisons de traçabilité ou d'autres besoins . Entre autres, les supermarchés, les magasins, les hôpitaux, ou lignes de production de l'industrie peuvent bénéficier de ce type de système. Cependant, la plupart des techniques sont théoriques et ne tiennent pas compte de l'influence des problèmes de signalisation de cas réels en intérieur. De plus, bien que le problème de la localisation et identification soit traitée dans de nombreux autres travaux, les solutions proposées restent encore insuffisantes en termes de précision. Dans cette thèse, nous proposons une solution pour identifier des éléments avec des étiquettes RFID qui sont en mouvement, en les séparant des autres tags dits statiques. Notre méthode est basée sur la configuration classique d'un scénario de ligne de production typiquement utilisé dans l'industrie. A la fin du processus d'identification la méthode détermine les étiquettes RFID en mouvement et les étiquettes RFID statiques. Notre méthode d'identification a deux variantes. Dans un premier temps, nous proposons un procédé hybride qui opère au niveau de la couche d'application, ce qui lui permet d'être discret et personnalisable. Dans la seconde variante, la couche physique est associée à la solution initiale afin de limiter et d'optimiser la zone d'identification. Pour la validation de la méthode, nous avons éffectué plusieurs expériences sur des applications réelles de type industriel ou logistique, dans différentes conditions d'environnement intérieur et en utilisant des paramètres par défaut. Les résultats des tests ont montré que notre méthode donne d’excellentes performances lorsqu'elle est appliquée dans les processus industriels<br>Indoor localization research has generated many of potential techniques and algorithms. Identifying RFID tags in an indoor environment with perfect accuracy is not a trivial task for many applications in industry, a marketplace, or a supply chain. Localization systems have been maturing as the number of applications requiring such capabilities has increased in popularity\cite{29} \cite{20}. In businesses, these applications allow intelligent process manufacturing, increasing productivity and enabling reliable product flows. Based on these systems, many processes need to localize and identify the movement of RFID tags. Marketplaces, shops, hospitals, or simple conveyor belts for supply chains can benefit from these tracking systems. However, most of these techniques do not take into account the influence of the real constraints to which the radio signal of the physical system is subject. Although this localization problem has been addressed in lots of treatments, it remains unsolved for systems that need precision. In this thesis, our solution involves identifying RFID tags in movement from others referred to as RFID static tags. We have based our methodology on the classical configuration supply chains scenario involved in industrial and market warehouse use cases. We completely identify which RFID tags are moving and which tags are placed outside and static by the time the conveyor belt supply chain process has ended. We developed our approach by proposing an identification method with two main variations. In its first variant, the method is hybrid and works directly in the application layer, which allows a non-intrusive, custom made and articulate RFID tag identification and classification. In its second variant, we also associate our solution with a physical layer constraint, to limit and optimize the identification zone.The evaluation of the performance shows an excellent precision in a practical industrial operational zone, validated with lots of experiments conducted in a real indoor application under different conditions and using classical setup devices
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Kaufman, Jaime C. "A Hybrid Approach to Music Recommendation: Exploiting Collaborative Music Tags and Acoustic Features." UNF Digital Commons, 2014. http://digitalcommons.unf.edu/etd/540.
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Recommendation systems make it easier for an individual to navigate through large datasets by recommending information relevant to the user. Companies such as Facebook, LinkedIn, Twitter, Netflix, Amazon, Pandora, and others utilize these types of systems in order to increase revenue by providing personalized recommendations. Recommendation systems generally use one of the two techniques: collaborative filtering (i.e., collective intelligence) and content-based filtering.
Systems using collaborative filtering recommend items based on a community of users, their preferences, and their browsing or shopping behavior. Examples include Netflix, Amazon shopping, and Last.fm. This approach has been proven effective due to increased popularity, and its accuracy improves as its pool of users expands. However, the weakness with this approach is the Cold Start problem. It is difficult to recommend items that are either brand new or have no user activity.
Systems that use content-based filtering recommend items based on extracted information from the actual content. A popular example of this approach is Pandora Internet Radio. This approach overcomes the Cold Start problem. However, the main issue with this approach is its heavy demand on computational power. Also, the semantic meaning of an item may not be taken into account when producing recommendations.
In this thesis, a hybrid approach is proposed by utilizing the strengths of both collaborative and content-based filtering techniques. As proof-of-concept, a hybrid music recommendation system was developed and evaluated by users. The results show that this system effectively tackles the Cold Start problem and provides more variation on what is recommended.
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Wamalwa, Mark. "Development of a comprehensive annotation and curation framework for analysis of Glossina Morsitans Morsitans expresses sequence tags." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5497_1325767222.
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This study has successfully identified transcripts differentially expressed in the salivary gland and midgut and provides candidate genes that are critical to response to parasite invasion. Furthermore, an open-source Glossina resource (G-ESTMAP) was developed that provides interactive features and browsing of functional genomics data for researchers working in the field of Trypanosomiasis on the African continent.
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Haarberg, Hans Eirik. "Theophylline IMAGEtags (intracellular multi aptamer genetic tags) the development and evaluation of an RNA reporter system based on the theophylline aptamer /." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1464205.
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Rohatgi, Anil. "Implementation and Applications of an Anti-Collision Differential-Offset Spread Spectrum RFID System." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13946.
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This report documents the design, construction, and implementation of a differential-offset spread spectrum RFID system, to avoid the problem of anti-collision interference from multiple RFID tags. Currently in industry, this problem is handled by establishing a two way communication link between the tags and the interrogator. The proposed system eliminates the need for the excessive hardware use to create this link, and therefore drastically reduces the cost of each tag. Not only is this system cheaper to implement but it is faster, requires less power, and by the nature of the design contains an inherent encryption scheme for the data being transmitted.
Specialized RFID tags were designed and fabricated in order to produce a pseudo random code unique to each tag. The design presented in this document allowed simultaneous interrogation of up to 255 tags within one sensing environment. Once queried, the tags then modulate the incoming signal from the interrogator with their own sequence, and reflect the signal back to the interrogator. What the interrogator then receives is a combination of backscatter from all of the tags within the sensing environment. Specialized software written in Matlab and LabView uses these unique sequences to isolate the data from a desired tag away from the sea of information being transmitted from every tag. Using this system, numerous applications for experiments and measurements can be devised.
One such application this thesis focuses on is the use of this system to simultaneously measure signal strengths from multiple diversity antennas in order to optimize their position and orientation. Currently, the majority of antenna diversity measurements are taken by measuring the signal strength of a given configuration one antenna at a time. By using the anti-collision RFID system proposed above, the signal strength produced by both antennas can be measured and recorded simultaneously to provide a true representation of their combined performance. This measurement can be used to find the optimal configuration for multiple antennas.
This thesis will fully explore the theories and procedures behind creating this system, and will provide the results and analysis of its performance.
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Andia, Vera Gianfranco. "Analyse et exploitation des non linéarités dans les systèmes RFID UHF passifs." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT052/document.
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Avec l'explosion de l'Internet des Objets (IoT), de nouveaux dispositifs permettant de tagguer les objets sont nécessaires afin de permettre non seulement leur identification mais aussi d'assurer des communications fiables et de nouvelles fonctionnalités comme la détection, la localisation ou la capture d'informations. Cette tendance s'appuie sur la technologie bien établie qu'est la radiofréquence par identification (RFID) et donc l'utilisation d'étiquettes (ou tags) faibles coûts et télé-alimentés. Dans ce contexte, de nombreux travaux au niveau de la couche d'application se tournent vers la mise au point de traitements logiciels complémentaires visant à produire de nouveaux types d'information. D'autres travaux visent à améliorer la couche physique avec l'objectif de miniaturiser encore le tag mais aussi de le doter de nouvelles capacités. Jusqu'à présent, il n'existe quasiment pas de travaux concernant la transmission du signal et aucun sur l'exploitation du comportement non-linéaire des puces RFID. Cette thèse vise à étudier les phénomènes non-linéaires produits lors d'une communication RFID.Dans la première partie, deux plateformes de mesure et de caractérisation spécifiques ont été développées : la première vise à observer les signaux au cours d'une communication RFID, et alors caractériser et analyser les effets liés aux phénomènes non linéaires ; la seconde permet d'effectuer différentes mesures directement sur les puces et les caractériser en termes d'impédance, production d'harmoniques et sensibilité. Ces plateformes ont permis : 1) de mettre en évidence que les fréquences harmoniques sont porteuses d'informations qui peuvent être exploitées et même offrir de nouvelles fonctionnalités ; 2) d'obtenir de nombreuses informations sur les propriétés des puces et d'en établir un modèle électrique précis ; 3) de déterminer des critères permettant d'évaluer la performance des tags dans le contexte étudié.Dans la deuxième partie, plusieurs nouveaux tags RFID ont été conçus, fabriqués, mesurés et évalués. Ces nouveaux tags fonctionnent non seulement dans la bande UHF mais aussi sont adaptés à la troisième harmonique dans la bande des microondes. Une méthodologie et des lignes directives d'aide à la conception de ce type de tags ont été établies et s'appuient sur les deux plateformes développées afin de caractériser les différents éléments. Dans un même temps, les effets liés à la fabrication ont aussi été étudiés et des études paramétriques ont permis de mettre en évidence l'effet sur les performances de la géométrie de l'antenne et du type de puce utilisée.Dans une troisième partie, les études se sont focalisées à exploiter les effets non-linéaires des dispositifs de redressement. L'idée générale est de coupler la RFID passive avec les dispositifs de transferts de puissance et de récupération d'énergie avec pour objectifs 1) de maximiser l'efficacité de conversion RF – continu 2) et d'augmenter la distance de lecture des tags passifs. Plusieurs prototypes ont été réalisés et leurs performances ont été démontrées.L'ensemble de ces travaux a mis en évidence un nouveau concept de communication RFID exploitant les non-linéarités générées par les puces RFID. Ce concept ouvre la voie à de nouvelles applications. et a fait l'objet d'une demande de brevet international<br>Powered by the exploding popularity of the Internet-of-Things (IoT), the demand for tagged devices with labels capable to ensure a reliable communication with added functions beyond the identification, such as sensing, location, health-care, among others, is growing rapidly. Certainly this growing is headed by the well-established Radio Frequency Identification (RFID) technology, and the use of wireless low-cost self-powered tags, in other words passive RFID tags, is the most widespread used alternative. In the constant evolution on this field, usually new software treatments are offered at the application layer with the objective to processing data to produce some new information. Further works aimed at improving the physical layer around the tag antenna miniaturization and matching techniques. So far, little or no work had been done on the exploitation of the communication channel, and certainly none has been done on the exploitation of the non-linear behavior of RFID chips.After presenting the RFID technology and phenomena produced by Radio Frequency (RF) non-linear devices, and leaning in some nearby works on the field, the core of this thesis starts by exposing two characterization platforms for the evaluation of non-linear phenomena presented during the reader-tag communication. One is specialized in radiating measurements considering the whole tag (antenna and chip) under test. The other is specialized in conducted measurements directly over RFID chips, allowing performing different parametric studies (power dependency, impedance, harmonic production, sensitivity). The characterization results show that harmonic signals generated from the passive RFID chip carry information.By exploiting the characterization results and to verify the hypothesis of exploitation of non-linearities in RFID, i.e. the use of harmonic signals, the research is pursued by designing, fabricating, and measuring four different configurations of RFID tags. The new RFID tags operate at the fundamental frequency in the UHF band and at its $3^{rd}$ harmonic in the microwave band. Antenna design policies, fabrication details, and parametric studies on the performance of the new prototypes are presented. The parametric study takes special care in the antenna structure, kind of chip used, received power, and read range.Finally, some alternatives approaches for the exploitation of non-linear effects generated by rectifying devices are presented. Some theoretical aspects and experimental results are discussed linking the passive RFID technology to the theories of Wireless Power Transfer (WPT) and Electromagnetic Energy Harvesting (EEH). The solution takes advantage of the non-linear nature of rectifying elements in order to maximize the RF-to-DC conversion efficiency of EEH devices and increase the read range of passive RFID tags. The solution triggers on the design of a RF multi-device system. The design procedure and tests consider three non-linear phenomena: (1) the impedance power dependency, (2) the harmonic production, and (3) the rectifying dependence on the RF waveform
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El-Goarany, Khaled. "Mining Social Tags to Predict Mashup Patterns." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/44897.
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In this thesis, a tag-based approach is proposed for predicting mashup patterns, thus deriving inspiration for potential new mashups from the communityâ s consensus. The proposed approach applies association rule mining techniques to discover relationships between APIs and mashups based on their annotated tags. The importance of the mined relationships is advocated as a valuable source for recommending mashup candidates while mitigating common problems in recommender systems. The proposed methodology is evaluated through experimentation using a real-life dataset. Results show that the proposed mining approach achieves prediction accuracy with 60% precision and 79% recall improvement over a direct string matching approach that lacks the mining information.<br>Master of Science
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Feng, Yi. "Printed RFID Humidity Sensor Tags for Flexible Smart Systems." Doctoral thesis, KTH, Industriell och Medicinsk Elektronik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-162152.
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Radio frequency identification (RFID) and sensing are two key technologies enabling the Internet of Things (IoT). Development of RFID tags augmented with sensing capabilities (RFID sensor tags) would allow a variety of new applications, leading to a new paradigm of the IoT. Chipless RFID sensor technology offers a low-cost solution by eliminating the need of an integrated circuit (IC) chip, and is hence highly desired for many applications. On the other hand, printing technologies have revolutionized the world of electronics, enabling cost-effective manufacturing of large-area and flexible electronics. By means of printing technologies, chipless RFID sensor tags could be made flexible and lightweight at a very low cost, lending themselves to the realization of ubiquitous intelligence in the IoT era. This thesis investigated three construction methods of printable chipless RFID humidity sensor tags, with focus on the incorporation of the sensing function. In the first method, wireless sensing based on backscatter modulation was separately realized by loading an antenna with a humidity-sensing resistor. An RFID sensor tag could then be constructed by combining the wireless sensor with a chipless RFID tag. In the second method, a chipless RFID sensor tag was built up by introducing a delay line between the antenna and the resistor. Based on time-domain reflectometry (TDR), the tag encoded ID in the delay time between its structural-mode and antenna-mode scattering pulse, and performed the sensing function by modulating the amplitude of the antenna-mode pulse. In both of the above methods, a resistive-type humidity-sensing material was required. Multi-walled carbon nanotubes (MWCNTs) presented themselves as promising candidate due to their outstanding electrical, structural and mechanical properties. MWCNTs functionalized (f-MWCNTs) by acid treatment demonstrated high sensitivity and fast response to relative humidity (RH), owing to the presence of carboxylic acid groups. The f-MWCNTs also exhibited superior mechanical flexibility, as their resistance and sensitivity remained almost stable under either tensile or compressive stress. Moreover, an inkjet printing process was developed for the f-MWCNTs starting from ink formulation to device fabrication. By applying the f-MWCNTs, a flexible humidity sensor based on backscatter modulation was thereby presented. The operating frequency range of the sensor was significantly enhanced by adjusting the parasitic capacitance in the f-MWCNTs resistor. A fully-printed time-coded chipless RFID humidity sensor tag was also demonstrated. In addition, a multi-parameter sensor based on TDR was proposed.The sensor concept was verified by theoretical analysis and circuit simulation. In the third method, frequency-spectrum signature was utilized considering its advantages such as coding capacity, miniaturization, and immunity to noise. As signal collision problem is inherently challenging in chipless RFID sensor systems, short-range identification and sensing applications are believed to embody the core values of the chipless RFID sensor technology. Therefore a chipless RFID humidity sensor tag based on near-field inductive coupling was proposed. The tag was composed of two planar inductor-capacitor (LC) resonators, one for identification, and the other one for sensing. Moreover, paper was proposed to serve as humidity-sensing substrate for the sensor resonator on accounts of its porous and absorptive features. Both inkjet paper and ordinary packaging paper were studied. A commercial UV-coated packaging paper was proven to be a viable and more robust alternative to expensive inkjet paper as substrate for inkjet-printed metal conductors. The LC resonators printed on paper substrates showed excellent sensitivity and reasonable response time to humidity in terms of resonant frequency. Particularly, the resonator printed on the UV-coated packaging paper exhibited the largest sensitivity from 20% to 70% RH, demonstrating the possibilities of directly printing the sensor tag on traditional packages to realize intelligent packaging at an ultra-low cost.<br><p>QC 20150326</p>
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Ma, Shanshan Wiedenbeck Susan McCain Katherine Wootton. "Using hierarchical folders and tags for file management /." Philadelphia, Pa. : Drexel University, 2010. http://hdl.handle.net/1860/3271.
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Frushour, John H. "Design considerations for a computationally-lightweight authentication mechanism for passive RFID tags." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Sep/09Sep%5FFrushour.pdf.
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Thesis (M.S. in Computer Science)--Naval Postgraduate School, September 2009.<br>Thesis Advisor(s): Fulp, J.D. ; Huffmire, Ted. "September 2009." Description based on title screen as viewed on November 6, 2009. Author(s) subject terms: Passive RFID Systems, Tags, Clock, Electro-magnetic induction, authentication, hash, SHA--1. Includes bibliographical references (p. 59-60). Also available in print.
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Mudd, Gemma Elizabeth. "Dyes, linkers, tags and libraries : new tools for systems chemical biology." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/17882.
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Chemical biology can be defined as the area of science where chemical tools are used to study biological systems. The simplest way this can be achieved is in the identification of compounds which inhibit or modulate a biological pathway and the consequences studied. However, novel tools are required to enable, for example, the development of assays to allow simpler screening of difficult targets such as membrane proteins and protein-protein interactions. A series of kisspeptin analogues were synthesised for the development of a screening platform compatible with G-protein coupled receptors and tagged one bead one compound (OBOC) combinatorial libraries. Fluorescently labelled kisspeptin showed good affinity for GPCR54 and an on-bead version of the peptide, with the required C-terminal amide presented away from the bead was prepared and used for testing possible screening methods. GPCR54 was expressed in a number of formats and a kisspeptin based OBOC library designed and synthesised. Investigation into the C-terminal RF-amide motif of Kisspeptin was also carried out in order to assess the importance of the carbonyl moiety. The corresponding peptide amine was synthesised and the compound biologically assessed. This led to the development of a novel acid labile benzofuranone (ALBA) linker for anchoring amines to a solid support. For the preparation of fluorescent kisspeptin ligands, a novel general synthetic route which gives direct access to single isomer functionalised rhodamine dyes from phthalides has been developed. This circumvents the arduous task of isomer separation usually associated with the synthesis of functionalised rhodamines. The route has been demonstrated with a range of linkage groups and rhodamine types. This rhodamine material was used as a reporter group in various multifunctional reagents synthesised using a trifunctional orthogonally protected backbone (TOBa), which was prepared on a solid support and enables rapid synthesis of trifunctional reagents. This resin takes advantage of protecting group orthogonality and the high yields of peptide bond formation. A series of trifunctional reagents for screening use were prepared using this resin. A proof of concept study was carried out involving the simultaneous labelling and immobilisation of a protein for applications in probing protein-protein interactions. Development of a trifunctional hydroxamic acid containing cross-linker was carried out which takes advantage of its reaction with boronic acids to enable reversible capture on solid support for enrichment of cross-linked peptides. A new benzophenone based heterobifunctional reagent was prepared for protein cross-linking and mass spectrometry analysis. This was shown to give complimentary reactivity to existing cross-linkers, allowing more structural information to be extracted from protein samples.
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Fonseca, Herbert Moreti 1973. "Encoding, application and association of radio frequency identification tags on high speed manufacturing lines." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28513.
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Thesis (M. Eng. in Logistics)--Massachusetts Institute of Technology, Engineering Systems Division, 2004.<br>"June 2004."<br>Includes bibliographical references (leaves 48-51).<br>One of the entry points of radio frequency identification technology in supply chain applications is at the manufacturing line, after production, as packaged goods leave for the next link of the network of suppliers, carriers, distributors and retailers. To RFID-enable packaged products, an RFID device needs to be attached to the packaging and an identification number needs to be generated and stored accordingly. Today, a few early adopters of the technology already started to apply RFID tags to some of their cases and pallets and to collect and store the information. These processes however, are still to a large extent done at a slow pace, manually or in an experimental mode, and that may not be suited for large scale applications. To address this issue, this research document focuses on the implementation of an RFID enabled process under strict time and performance constraints, for case packaged goods and pallets. This document reviews the currently published information on the topic and the Auto-ID technology standards. It analyses system integration challenges, proposes a process for case and pallet level encoding, application and association and discusses some of information systems requirements for the implementation. It proposes a framework of options with the requirements and considerations the author believes to be most relevant.<br>by Herbert Moreti Fonseca.<br>M.Eng.in Logistics
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Akbar, Muhammad Bashir. "Design and prototype development of motion and shock sensing rf tags." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43666.
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Since the inception of the backscatter-radio technology, this field has continually evolved. As a result, this technology is used for a multitude of applications like personnel identification, logistics and assets management and military purposes etc. Radio Frequency Identification (RFID) technology works in several ISM-frequency bands. This work pertains to the design and development of an RF tag that uses 5.8
GHz ISM band for backscatter. This frequency band has many inherent advantages like higher gain antennas, smaller sized tags, increased immunity to conductive object losses, and larger RF bandwidth.
The objective of this research is design and prototype development of an RF tag capable of sensing acceleration, angular motion, and shock experienced by an object on which it is installed. The sensed information is modulated onto an incident continuous wave (CW) and backscattered to the reader. Literature research suggested that such work has not been done previously using an RFID platform. The challenges
include integration of the sensor, antenna and other electronics to efficiently backscatter the information to the receiver, designing a suitable planar antenna, realtime backscattering of the sensed information, and low power consumption. As a further step, it is required to design and integrate two antennas on RF tag to simultaneously
backscatter the same information; and to measure and compare its effect with single antenna tag.
The sensed impact/shock and rotational movement information from the inertial sensors (accelerometer and gyroscope) was backscattered instantly and displayed on the custom developed graphical user interface. The development of GUI was not part of this project and was developed by another lab member. RF Tags with single and dual antenna configurations were designed and tested. It was observed that by increasing the number of antennas higher read range can be achieved. Moreover, by doubling the antennas the radar cross-section for the tag was approximately doubled.
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Schumacher-Novak, Gregory Donald. "RFID tags / planar inductors as chemical sensor platforms in liquid sensing applications." [Milwaukee, Wis.] : e-Publications@Marquette, 2009. http://epublications.marquette.edu/theses_open/5.
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Cohen, F. "TASS - Text Analysis System for Understanding News Stories." Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383567.
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Givon, Sharon. "Predicting and using social tags to improve the accuracy and transparency of recommender systems." Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/5770.
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This thesis describes work on using content to improve recommendation systems. Personalised recommendations help potential buyers filter information and identify products that they might be interested in. Current recommender systems are based mainly on collaborative filtering (CF) methods, which suffer from two main problems: (1) the ramp-up problem, where items that do not have a sufficient amount of meta-data associated with them cannot be recommended; and (2) lack of transparency due to the fact that recommendations produced by the system are not clearly explained. In this thesis we tackle both of these problems. We outline a framework for generating more accurate recommendations that are based solely on available textual content or in combination with rating information. In particular, we show how content in the form of social tags can help improve recommendations in the book and movie domains. We address the ramp-up problem and show how in cases where they do not exist, social tags can be automatically predicted from available textual content, such as the full texts of books. We evaluate our methods using two sets of data that differ in product type and size. Finally we show how once products are selected to be recommended, social tags can be used to explain the recommendations. We conduct a web-based study to evaluate different styles of explanations and demonstrate how tag-based explanations outperform a common CF-based explanation and how a textual review-like explanation yields the best results in helping users predict how much they will like the recommended items.
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Razavi, S. H. "Data transmission over TACS cellular radio." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329178.
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Yamashita, Juliana Sato. "Visualização de tags para explicar e filtrar recomendações de músicas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/45/45134/tde-06062013-142529/.
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Coleções digitais de mídias, tanto pessoais como online, crescem rapidamente. Para que grandes quantidades de músicas sejam acessíveis à usuários, serviços populares como iTunes, Last.fm e Pandora oferecem recomendações. Essa abordagem livra usuários de lembrarem de músicas, e permite a descoberta de canções novas ou esquecidas. Mas recomendações apresentam problemas com usuários, como credibilidade e falta de controle. A motivação deste trabalho é melhorar a experiência de usuários com recomendações de música através do uso de explicações. Ao usar um sistema de recomendação, a satisfação e aprovação de usuários não depende só da eficácia do algoritmo, mas também de explicações. Pesquisas mostram que estas podem beneficiar sistemas de recomendação, aumentando a credibilidade e satisfação de usuários, ao oferecer mais transparência e formas de correção. O objetivo deste trabalho é projetar e desenvolver uma nova forma de visualização de tags, e testar sua viabilidade para explicar e filtrar recomendações de músicas. Mais precisamente, investigamos se esta visualização pode favorecer as metas de inspeção (scrutability), eficiência, eficácia e satisfação. A partir da pesquisa em necessidades de usuários para recomendações e música, a visualização Tag Strings foi projetada e desenvolvida. Tag Strings inclui tanto a interface da visualização, quanto o processo de coleta e cálculo de relevância de tags e músicas. Para a avaliação da visualização Tag Strings, dois tipos de experimentos foram construídos: a comparação entre uma lista de recomendações com Tag Strings, e a comparação entre o design de referência (baseado nos serviços Last.fm e Pandora) e Tag Strings. A construção desses dois experimentos permitiu a avaliação de Tag Strings como uma forma de explicação para recomendações de música. Os resultados dos experimentos evidenciam que a nova forma de visualização Tag Strings favorece as metas de inspeção (scrutability), eficiência, eficácia e satisfação, melhorando a usabilidade e experiência de usuários com recomendações de música.<br>Digital media collections, both personal and online, grow rapidly. To make large music collections available to users, popular services such as iTunes, Last.fm and Pandora offer recommendations. This approach frees users from searching for music, and allows for the discovery of new or forgotten items. But recommendations present issues such as user trust and lack of control. The motivation for this project is to improve user experience with music recommendations through explanations. While using a recommendation system, user acceptance and satisfaction depends not only on the algorithm effectiveness, but also on explanations. Research shows that recommendations benefit from explanations, increasing user trust and satisfaction by offering more transparency and scrutability. The goal of this project is to design and develop a new form of tag visualization, and test its feasibility to explain and filter music recommendations. We specifically investigate if the visualization can support the aims of scrutability, efficiency, effectiveness and satisfaction. Based on the user research and needs for music recommendation, the visualization Tag Strings was designed and developed. Tag Strings includes both the visualization interface and the process of collecting and calculation of tag and track relevancy. To evaluate the visualization Tag String, we designed two types of experiments: comparing Tag Strings with a recommendation list, and comparing Tag Strings with a design reference (based on the services Last.fm and Pandora). The design of these two experiments allowed the evaluation of Tag Strings as a form of explanation to music recommendation. The experiment results highlight that the new visualization Tag Strings favors the aims of scrutability, efficiency, effectiveness and satisfaction, improving the user experience with music recommendations.
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Leung, Yun Yuen. "Performance models and fabrication of low cost radio frequency identification tags with printed antennas /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?MECH%202008%20LEUNG.
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Brodén, Jon. "EAS-tagg med fuktsensor : Design och utvärdering av EAS-alarmteknologi för fuktdetektering." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-18708.
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Electronic article surveillance (EAS) is widely used in shops and libraries together with an RF-tag attached to the goods or books in order to prevent shoplifting. By implementing the addition of a moisture sensor to the RF-tag, other functions become possible, including the ability to use as an alarm with regards to frozen goods, which have been shipped but which have melted and have, subsequently, refrozen. In- relation to care for the elderly, one time-consuming step involves checking whether there is the necessity for a change of diaper and this can, instead, be based on an RF-tag with an EAS-system alarm. A preliminary investigation was made using the moisture sensors, which involved how the resistance changes when liquid and/or heat is applied. A simulation of the LCCR circuit (RF-tag with the sensor) was conducted in order to determine how the resonance frequency changes for different resistances levels. When the moisture sensors are applied to the RF-tag with the correct resistance no alarm will be triggered, but will be triggered when water is added to the moisture sensor. In order for the tag to be able to induce energy from the transmitter in the EAS-system the resistance must be less than ten ohms in relation to the entire tag. Results show that the implementation of the sensor on the RF-tag is possible and that it works in a satisfactory manner.<br>Elektroniska varularm EAS (Electronic article surveillance) är vida använt i butiker och bibliotek tillsammans med RF-tagg som är fäst på varor böcker för att förhindra snatteri. Genom att implementera fuktsensor till RF-taggen kan den få andra funktioner som då kan användas till larm om frysvaror fraktas har tinat men fryst igen, samt till äldrevården där ett tidsdödande moment är att hela tiden kontrollera om vårdtagaren behöver byta blöja. I stället kan RF-taggen med EAS-systemet larma. Förundersökning gjordes med fuktsensorn som är en sensor för hur resistansen ändras när vätska och värme förs på den. Simulering av LCCR krets (RF-tagg med sensor) gjordes för att se hur resonansfrekvensen ändras vid olika resistansnivåer. När fuktsensorn är applicerad på RF-tagg med rätt resistans triggas inte alarm, men däremot när vatten förs på fuktsensorn. För att taggen ska kunna inducera energin från sändaren i EAS-system måste resistansen vara lägre än tio ohm på hela RF-taggen. Resultatet visar att implementering av sensor på RF-tagg är möjlig och fungerar.
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Alkhaldi, Abdulmajeed. "A Recommender System using Tag-based Collaborative User Model." Thesis, University of Ottawa (Canada), 2011. http://hdl.handle.net/10393/28840.
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Internet users are overwhelmed by a huge media amount available online. Therefore there is a need of an automated way to make compelling recommendations to users according to their needs. There have been many research efforts to reduce that huge amount of content to what the user really needs or prefers. Recommender systems assisting users in easily finding the useful information, are a main research topic that serves this area. According to techniques recommender systems employ, they are mainly classified into three categories: a collaborative-based filtering, content-based filtering, and hybrid filtering. Collaborative filtering relies on the collaboration of users by capturing their judgments on items, and then recommends these items to users with similar taste. Content-based filtering takes advantage of content of a user's preferred items and recommends new items that have similar content. Hybrid filtering takes advantage of both collaborative and content- based filtering and might be in a different ways. No matter what the technique is used, recommender systems require an accurate user model that can reflect a user's characteristics, preferences, and topics of interest. In addition, the systems should take into account users who newly join the systems and thus has presented few opinions, commonly referred to as the cold start users problem. In our research, by leveraging user-generated tags, we propose the topic-driven enriched user model (EM), which is a new way of modeling a user's topics of interest in collaboration with other similar users, in order to improve the recommendation quality and alleviate the cold start user problem. We also present how the proposed model is applied to item recommendations by using locally weighted naive Bayes approach. For evaluating the performance of our model, we compare experimental results with a user model based on user-based collaborative filtering, a user model based on an item-based collaborative filtering, and a vector space model. The experimental results shows that EM outperforms the three algorithms in both recommendation quality and the cold start situation.
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Al-Adhami, Ayad. "A secure quorum based multi-tag RFID system." Thesis, University of Plymouth, 2018. http://hdl.handle.net/10026.1/12821.
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Radio Frequency Identification (RFID) technology has been expanded to be used in different fields that need automatic identifying and verifying of tagged objects without human intervention. RFID technology offers a great advantage in comparison with barcodes by providing accurate information, ease of use and reducing of labour cost. These advantages have been utilised by using passive RFID tags. Although RFID technology can enhance the efficiency of different RFID applications systems, researchers have reported issues regarding the use of RFID technology. These issues are making the technology vulnerable to many threats in terms of security and privacy. Different RFID solutions, based on different cryptography primitives, have been developed. Most of these protocols focus on the use of passive RFID tags. However, due to the computation feasibility in passive RFID tags, these tags might be vulnerable to some of the security and privacy threats. , e.g. unauthorised reader can read the information inside tags, illegitimate tags or cloned tags can be accessed by a reader. Moreover, most consideration of reserchers is focus on single tag authentication and mostly do not consider scenarios that need multi-tag such as supply chain management and healthcare management. Secret sharing schemes have been also proposed to overcome the key management problem in supply chain management. However, secret sharing schemes have some scalability limitations when applied with high numbers of RFID tags. This work is mainly focused on solving the problem of the security and privacy in multi-tag RFID based system. In this work firstly, we studied different RFID protocols such as symmetric key authentication protocols, authentication protocols based on elliptic curve cryptography, secret sharing schemes and multi-tag authentication protocols. Secondly, we consider the significant research into the mutual authentication of passive RFID tags. Therefore, a mutual authentication scheme that is based on zero-knowledge proof have been proposed . The main object of this work is to develop an ECC- RFID based system that enables multi-RFID tags to be authenticated with one reader by using different versions of ECC public key encryption schemes. The protocol are relied on using threshold cryptosystems that operate ECC to generate secret keys then distribute and stored secret keys among multi RFID tags. Finally, we provide performance measurement for the implementation of the proposed protocols.
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Levin-Svenson, Patrik. "Synchronization in a radio based price tag system." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-199402.
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Srinivasan, Nikhil S. "The Long-Tails in Content Services: How the Structure of Hybrid Networks Shape Content Popularity and Related Decision-Making." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1355748209.
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Kumar, Vijay. "Exploring fully integrated textile tags and information systems for implementing traceability in textile supply chains." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10067/document.
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La traçabilité, en général, fait référence à un suivi de l’information jusqu’à un certain point. Le concept de traçabilité est considéré comme un élément essentiel pour vérifier les divers aspects des produits dans différentes industries et leurs chaînes d’approvisionnement mondiales. L’industrie textile est parmi celles que l’on accuse de temps en temps d’un défaut de transparence dans leur chaîne d’approvisionnement et faisant parfois appel à des pratiques insoutenables. C’est plus particulièrement après une série de catastrophes industrielles que les consommateurs et les organisations non-gouvernementales ont commencé à s’intéresser de près aux marques avec le souci que les entreprises apportent plus de transparence à leur chaîne d’approvisionnement. Dans cette logique, la traçabilité a été identifiée comme un outil permettant aux entités de tracer leurs approvisionnements tout au long de la chaîne de transformation et de collecter des informations pertinentes afin d’assurer la transparence et de répondre dans la mesure du possible, aux attentes. La traçabilité a été reconnue comme un avantage compétitif qui agit souvent comme un facteur clé dans la décision d’achat. De plus, les produits textiles font partie des biens les plus contrefaits dans le monde. Par conséquent, le besoin de traçabilité s’est intensifié en ce qui concerne la surveillance et la sécurité de la chaîne d’approvisionnement tout autant que pour l’authentification des produits. L’objectif principal de cette thèse est d’aborder la mise en œuvre des systèmes de traçabilité de l’information dans la chaîne d’approvisionnement textile. En outre, elle interroge la faisabilité d’un traçage basé sur l’intégration de marqueurs de suivi à l’échelle des fils, comme un moyen d’insérer une traçabilité dans les textiles. Cet objectif a été mené à travers plusieurs études indépendantes dans le domaine de la fabrication du textile, de la gestion des chaînes d’approvisionnement et des systèmes d’information. Les documents annexes à cette thèse apportent divers éclairages sur l’intégration d’une traçabilité dans les chaînes d’approvisionnement textiles et sur comment une information traçable peut être codée à l’intérieur de textiles via l’utilisation d’un codage basé sur le fil, échelle intermédiaire entre les fibres et les étoffes. La traçabilité se divise en deux parties, à savoir le système d’information et le marquage. Ce dernier point est utilisé pour identifier de manière unique le produit dans la chaîne d'approvisionnement et aide à rappeler et / ou à stocker les données de traçabilité pertinentes dans le système d'information. Différents acteurs de la chaîne d’approvisionnement gèrent les données de traçabilité dans leurs systèmes d’information, de sorte que le marqueur agisse comme un élément de liaison pour l’échange d’informations. De ce point de vue, cette thèse introduit le concept de codage des fils et de balises intégrées pouvant potentiellement être utilisé dans le futur pour des applications de traçabilité des textiles. De plus, un cadre général est proposé sur l’intégration d’un système d’information sur la traçabilité des textiles dans la chaîne d’approvisionnement. Ce travail souligne différents éléments pouvant jouer un rôle significatif dans la promotion et/ou la mise en œuvre de la traçabilité. La traçabilité lie intimement les aspects techniques et organisationnels. Elle requiert donc une approche technico-managériale pour garantir une solution optimale<br>Traceability, in general, refers to keeping track of information to a certain degree. The concept of traceability is considered important to verify the various aspects of products in different industries and their global supply chains. Textile industry is among those which are accused time-to-time for opaque supply chains and unsustainable practices. Particularly, the aftermath of a series of industrial catastrophes, customers and non-government organizations have started to scrutinize the brands to bring transparency in their supply chains. In this direction, traceability has been identified as a tool for organizations to trace their supplies throughout the supply chains and collect relevant information to ensure transparency and claim validation. Traceability has been further acknowledged as a competitive element and often acts as a decisive factor in purchase process. Moreover, the textile products are one of the most counterfeit-prone items around the world. As a result, the demand for traceability has been intensified for supply chain monitoring and security, and product authentication. The principal aim of this thesis was to address the implementation of traceability information systems in the textile supply chain. Further, it investigates the feasibility of yarn-based integrated tracking tags as a means to impart traceability in textiles. It has been pursued through several independent studies in the domain of textile manufacturing, supply chain management and information systems. The appended papers in this thesis address various aspects of traceability implementation in the textile supply chain and how traceability information can be encoded into the textiles using yarn-based coding. Traceability consists of two components namely information system and tagging. The latter component is used to uniquely identify the product in the supply chain which assists in recalling and/or storing the relevant traceability data from/in the information system. Different actors in the supply chain manage the traceability data in their information systems, therefore traceability tag acts as a linking agent for information exchange. In this direction, this thesis introduces the concept of yarn coding and yarn coding-based integrated tags which can be potentially used in future for textile traceability applications. In addition, a framework is proposed for the implementation of traceability information system in the textile supply chain. The work highlights various elements which can play a significant role in promoting and/or implementing traceability. Regardless of perspective or viewpoint, traceability is interwoven between technical and managerial aspects; therefore traceability implementation requires a techno-management approach to obtain an optimal solution
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Silva, Bruno de Abreu. "Gerenciamento de tags na arquitetura ChipCflow - uma máquina a fluxo de dados dinâmica." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-17052011-085128/.
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Nos últimos anos, percebeu-se uma crescente busca por softwares e arquiteturas alternativas. Essa busca acontece porque houve avanços na tecnologia do hardware e estes avanços devem ser complementados por inovações nas metodologias de projetos, testes e verificação para que haja um uso eficaz da tecnologia. Muitos dos softwares e arquiteturas alternativas, geralmente partem para modelos que exploram o paralelismo das aplicações, ao contrário do modelo de von Neumann. Dentre as arquiteturas alternativas de alto desempenho, tem-se a arquitetura a fluxo de dados. Nesse tipo de arquitetura, o processo de execução de programas é determinado pela disponibilidade dos dados. Logo, o paralelismo está embutido na própria natureza do sistema. O modelo a fluxo de dados possui a vantagem de expressar o paralelismo de maneira intrínseca, eliminando a necessidade de o programador explicitar em seu código os trechos onde deve haver paralelismo. As arquiteturas a fluxo de dados voltaram a ser um tema de pesquisa devido aos avanços do hardware, em particular, os avanços da Computação Reconfigurável e os FPGAs (Field-Programmable Gate Arrays). O projeto ChipCflow é uma ferramenta para execução de algoritmos usando o modelo a fluxo de dados dinâmico em FPGA. Este trabalho apresenta o formato para os tagged-tokens do ChipCflow, os operadores de manipulação das tags dos tokens e suas implementações a fim de que se tenha a PROVA-DE-CONCEITOS para tais operadores na arquitetura ChipCflow<br>The alternative architectures and softwares researches have been growing in the last years. These researches are happening due to the advance of hardware technology and such advances must be complemented by improvements on design methodologies, test and verification techniques in order to use technology effectively. Many of the alternative architectures and softwares, in general, explore the parallelism of applications, differently to von Neumann model. Among high performance alternative architectures, there is the Dataflow Architecture. In this kind of architecture, the execution of programs is determined by data availability, thus the parallelism is intrinsic in these systems. The dataflow architectures become again a highlighted research area due to hardware advances, in particular, the advances of Reconfigurable Computing and FPGAs (Field-Programmable Gate Arrays). ChipCflow project is a tool for execution of algorithms using dynamic dataflow graph in FPGA. The main goal in this module of the ChipCflow project is to define the tagged-token format, the iterative operators that will manipulate the tags of tokens and to implement them
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Ye, Qianyun. "2.4-GHz Wireless Network Based Multi-Tag Access System." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-188491.
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Machine-to-Machine technology has been intensively researched recently which is believed to take the role of leading ICT industry development. Wireless Sensor Networks provide solution to integrate numerous numbers of machines who require features include low power, low cost, and flexible, which can be fulfilled by applying Zigbee technique. This thesis devotes an effort into Wireless Sensor Network development that a Multi- Tag System operating on 2.4-GHz wireless network is developed. A theoretical study about ZigBee protocol and its bottom layers IEEE 802.15.4 standard is provided to lay a foundation of the design work. The thesis also includes a practical usage of low cost TI CC2530 Systom-on-Chip, together with the illustration of software development inside the chip. The design work provides GUI Platform for users to register themselves into the network and central monitoring platform to track all users within the area. Both GUI platforms are developed based on VB IDE. The Multi-Tag Access System is suitable for attendee control functionality in big-scale conference, events, and lecture, which is also a prototype expecting more functionality to be added in the future.
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Esper, Jaime [Verfasser], and Hans-Peter [Akademischer Betreuer] Röser. "Mission design and technology for a Titan Aerobot Balloon System (TABS) = Mission Design und Technologie für ein Titan-Aerobot-Ballon-System (TABS) / Jaime Esper. Betreuer: Hans-Peter Röser." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2012. http://d-nb.info/1024884821/34.
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Berti, Federico. "RFID tag localization with virtual multi-antenna systems." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/9753/.
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In questa tesi si sono valutate le prestazioni di un sistema di localizzazione multi-antenna di tag radio frequency identification (RFID) passivi in ambiente indoor. Il sistema, composto da un reader in movimento che percorre una traiettoria nota, ha come obiettivo localizzare il tag attraverso misure di fase; più precisamente la differenza di fase tra il segnale di interrogazione, emesso dal reader, e il segnale ricevuto riflesso dal tag che è correlato alla distanza tra di essi.
Dopo avere eseguito una ricerca sullo stato dell’arte di queste tecniche e aver derivato il criterio maximum likelihood (ML) del sistema si è proceduto a valutarne le prestazioni e come eventuali fattori agissero sul risultato di localizzazione attraverso simulazioni Matlab.
Come ultimo passo si è proceduto a effettuare una campagna di misure, testando il sistema in un ambiente reale. Si sono confrontati i risultati di localizzazione di tutti gli algoritmi proposti quando il reader si muove su una traiettoria rettilinea e su una traiettoria angolare, cercando di capire come migliorare i risultati.
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Omojola, Olufemi Abidemi 1977. "An open architecture radio frequency system for electromagnetic tag detection." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/86824.
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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.<br>Includes bibliographical references (leaves 90-91).<br>by Olufemi Abidemi Omojola.<br>M.Eng.
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West, Alaiyi F. "The fibroblast growth factor system as a target for the therapy in human prostrate cancer." Thesis, University of Newcastle Upon Tyne, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251335.
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Nguyen, Thanh Chuyen. "Studies on Algorithms for Tag Identification and Tag Set Cardinality Estimation in Radio Frequency Identification Systems." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/174849.
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Hassinen, Cynthia. "Effects of fusion tags on protein partitioning In aqueous two-phase systems and use in primary protein recovery." Licentiate thesis, KTH, Biotechnology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1391.
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<p>The two techniques aqueoustwo-phase partitioning and expanded bed adsorption that bothare suitable for primary protein recovery were studied. Most ofthe work was focused on partition in aqueous two-phase systemsand in particular on the possibility to effect the partitionbehaviour by fusion of short peptide tags or protein domains tothe target protein.</p><p>The partitioning of fusionproteins between different variants of the domain tag Z and thenaturally occurring protein DNA Klenow polymerase were studiedin Breox/Reppal aqueous two-phase systems. Most studies wereperformed with cell homogenate. The Breox/Reppal system was infocus because if the fusion protein can be partitioned to theBreox-rich top phase the next step can be a thermoseparatingaqueous two-phase system. When the Breox phase is heated to50°C it switches from a one-phase system to a two-phasesystem resulting in an almost pure water rich top phase andhighly concentrated Breox-rich bottom phase. The Breox can thenbe reused and the protein recovered from the water phase. TheZ-domain was genetically modified in different ways to Z<sub>basic1</sub>, Z<sub>acid2</sub>and Z<sub>trp12</sub>and fused to the Klenow protein to try toenhance partitioning to the Breox-rich phase. From theexperiments it was not possible to observe any effects on thepartition behaviour irrespectively of tested properties of thedomain tag. Despite the absence of domain tag effects highK-values, i.e. partition to the Breox-rich top phase, wereobserved in the Breox/Reppal system. However, the proteinK-values seemed to be rather sensitive to the cell homogenateload and showed a tendency to decrease with increased cellhomogenate load. Also increased phosphate concentration reducedthe K-values. The partitioning of cell debris also seemed todependent on the cell homogenate load. At higher homogenateload (<=20g DW/L) clear Breox-rich top phases were observedwith the cell debris collected in Reppal-rich bottomphases.</p><p>Two different tetrapeptides,AlaTrpTrpPro and AlaIleIlePro were inserted near the C-terminusof the protein ZZT0. The Trp-rich peptide unit stronglyincreased both the partitioning of ZZT0 into the poly(ethyleneglycol) (PEG)-rich phase in a PEG/potassium phosphate aqueoustwo-phase system and its retention on PEG and propylhydrophobic interaction chromatographic columns with potassiumphosphate as eluent in isocratic systems. Both the partitioningand the retention increased with increasing number of Trp-richpeptide units inserted into ZZT0. Insertion of Ile-richtetrapeptide units affected the partitioning and retention to amuch lesser extent. Partition and modelling data also indicateda folding of inserted Trp and Ile tetrapeptide units, probablyto minimise their water contact. It was also investigated howto predict the partitioning of proteins in isoelectricPEG/phosphate aqueous two-phase systems.</p><p>The capture ofß-galactosidase from<i>E. coli</i>cell homogentate (50g DW/L) by metal chelatexpanded bed adsorption was studied. These experiments showedthat capture, with a certain degree of selectivity, andclarification of ß-galactosidase could be achieved from acell homogenate. However, a rather low recovery of about 35 %was obtained at a capacity of 0.25mg/mL of gel. Thus, severalparameters remain to be optimised like the load buffercomposition and the cell homogenate load.</p><p><b>Keywords:</b><i>E. coli</i>, aqueous two-phase systems, fusion proteins,hydrophobic interaction chromatography, expanded bedadsorption, ß-galactosidase, Klenow polymerase, Z-domain,peptide tags</p>
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Kratzert, Sebastian Möller Manuel. "Dokumentation Netzwerk Chemnitzer Linux-Tag 2004." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11163725.
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Mazurek, Michelle L. "A Tag-Based, Logical Access-Control Framework for Personal File Sharing." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/325.
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People store and share ever-increasing numbers of digital documents, photos, and other files, both on personal devices and within online services. In this environment, proper access control is critical to help users obtain the benefits of sharing varied content with different groups of people while avoiding trouble at work, embarrassment, identity theft, and other problems related to unintended disclosure. Current approaches often fail, either because they insufficiently protect data or because they confuse users about policy specification. Historically, correctly managing access control has proven difficult, timeconsuming, and error-prone, even for experts; to make matters worse, access control remains a secondary task most non-experts are unwilling to spend significant time on.
To solve this problem, access control for file-sharing tools and services should provide verifiable security, make policy configuration and management simple and understandable for users, reduce the risk of user error, and minimize the required user effort. This thesis presents three user studies that provide insight into people’s access-control needs and preferences. Drawing on the results of these studies, I present Penumbra, a prototype distributed file system that combines semantic, tag-based policy specification with logicbased access control, flexibly supporting intuitive policies while providing high assurance of correctness. Penumbra is evaluated using a set of detailed, realistic case studies drawn from the presented user studies. Using microbenchmarks and traces generated from the case studies, Penumbra can enforce users’ policies with overhead less than 5% for most system calls. Finally, I present lessons learned, which can inform the further development of usable access-control mechanisms both for sharing files and in the broader context of personal data.
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Johansson, Oscar, and Lucas Wassénius. "Estimation of Orientation in a Dual-Tag Ultra Wideband Indoor Positioning System." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385873.
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In this report the feasibility of using a dual-tag setup in an indoor positioning system was investigated. The reason for the dual-tag setup was to be able to estimate both position and orientation. The system was designed using UWB-technology, with an time of flight trilateration algorithm to calculate the position. The orientation was then estimated from the relative position between the two tags. The system was tested both with stationary tags, but also with the tags moving along two paths. These tests were conducted for different separation distance between the tags, namely 20 cm, 30 cm and 40 cm. The result was that the mean position error for stationary tags was less than 8 cm for all separations and the mean orientation error was less than 3$^\circ$ for all separations. For the moving tag tests a decrease of the error in orientation of about 30 \% could be observed for a separation of 30 and 40 cm compared to 20 cm. However this difference is small in absolute values so more tests are needed to draw any conclusion about whether 30 and 40 cm tag separation performs better than 20 cm tag separation. The performance of the system could also be increased further by optimizing the anchor placement as well as the calibration of the antenna delays of the UWB-modules.
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Kratzert, Sebastian, and Manuel Möller. "Dokumentation Netzwerk Chemnitzer Linux-Tag 2004." Thesis, Universitätsbibliothek Chemnitz, 2004. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200400738.
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Während sich der Chemnitzer Linux-Tag über die vergangenen fünf Jahre mit jedem Mal in der Zahl der Aussteller, Helfer und Gäste steigerte, wuchs auch in jedem Jahr das Tagungsnetzwerk.
Den Informatikern wird häufig nachgesagt, daß sie wenig dokumentieren würden. Dieses Vorurteil traf auch für das Netzwerk der vergangenen Chemnitzer Linux-Tage zu. Unter anderem, um diesem Mißstand abzuhelfen, haben wir uns bemüht, möglichst detailliert Informationen über Konzept, eingesetzte Technologieen und konkrete Konfiguration des Tagungsnetzwerks des Chemnitzer Linux-Tags 2004 zusammenzutragen.
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Zanardi, V. "Addressing the cold start problem in tag-based recommender systems." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1310580/.
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Folksonomies have become a powerful tool to describe, discover, search, and navigate online resources (e.g., pictures, videos, blogs) on the Social Web. Unlike taxonomies and ontologies, which impose a hierarchical categorisation on content, folksonomies directly allow end users to freely create and choose the categories (in this case, tags) that best describe a piece of information. However, the freedom aafforded to users comes at a cost: as tags are defined informally, the retrieval of information becomes more challenging. Different solutions have been proposed to help users discover content in this highly dynamic setting. However, they have proved to be effective only for users who have already heavily used the system (active users) and who are interested in popular items (i.e., items tagged by many other users). In this thesis we explore principles to help both active users and more importantly new or inactive users (cold starters) to find content they are interested in even when this content falls into the long tail of medium-to-low popularity items (cold start items). We investigate the tagging behaviour of users on content and show how the similarities between users and tags can be used to produce better recommendations. We then analyse how users create new content on social tagging websites and show how preferences of only a small portion of active users (leaders), responsible for the vast majority of the tagged content, can be used to improve the recommender system's scalability. We also investigate the growth of the number of users, items and tags in the system over time. We then show how this information can be used to decide whether the benefits of an update of the data structures modelling the system outweigh the corresponding cost. In this work we formalize the ideas introduced above and we describe their implementation. To demonstrate the improvements of our proposal in recommendation efficacy and efficiency, we report the results of an extensive evaluation conducted on three different social tagging websites: CiteULike, Bibsonomy and MovieLens. Our results demonstrate that our approach achieves higher accuracy than state-of-the-art systems for cold start users and for users searching for cold start items. Moreover, while accuracy of our technique is comparable to other techniques for active users, the computational cost that it requires is much smaller. In other words our approach is more scalable and thus more suitable for large and quickly growing settings.
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Akther, Aysha. "Social Tag-based Community Recommendation Using Latent Semantic Analysis." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23238.
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Collaboration and sharing of information are the basis of modern social web system. Users in the social web systems are establishing and joining online communities, in order to collectively share their content with a group of people having common topic of interest. Group or community activities have increased exponentially in modern social Web systems. With the explosive growth of social communities, users of social Web systems have experienced considerable difficulty with discovering communities relevant to their interests. In this study, we address the problem of recommending communities to individual users. Recommender techniques that are based solely on community affiliation, may fail to find a wide range of proper communities for users when their available data are insufficient. We regard this problem as tag-based personalized searches. Based on social tags used by members of communities, we first represent communities in a low-dimensional space, the so-called latent semantic space, by using Latent Semantic Analysis. Then, for recommending communities to a given user, we capture how each community is relevant to both user’s personal tag usage and other community members’ tagging patterns in the latent space. We specially focus on the challenging problem of recommending communities to users who have joined very few communities or having no prior community membership. Our evaluation on two heterogeneous datasets shows that our approach can significantly improve the recommendation quality.
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Nurzai, Zmarai [Verfasser]. "EVAS (EndoVascular Aneurysm Sealing) mittels Nellix-Stent-System : Ersterfahrung und 30-Tages-Ergebnisse / Zmarai Nurzai." Ulm : Universität Ulm, 2018. http://d-nb.info/1154856445/34.
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Gummalla, Srikanth. "Design and Implementation of an Optical Tag Reader." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1229447375.
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Dartois, Arnaud. "Au dela du tas de sable, un nouveau modèle combinatoire: Le modèle flèche-hauteur." Phd thesis, Ecole Polytechnique X, 2004. http://pastel.archives-ouvertes.fr/pastel-00001113.
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Chang, Li-Jen, and 張力仁. "A Locker System With NFC Tags." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/56kx7r.
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碩士<br>聖約翰科技大學<br>資訊與通訊系碩士班<br>104<br>In the past, most of the lockers installed in public facilities were traditional mechanical lockers that use either the password or the key as an access means. On the other hand, electronic lockers were relatively rare because of high manufacture cost and appropriate technologies being unavailable then. However, mechanical lockers are easy to be broken in, such that the stuff put in the locker is not safe from stealing. Moreover, key lost or password forgotten happens all the time, causing personal belongings placed in the locker unable to be retrieved immediately because further confirmation of the renter’s identity is necessary.Because the Internet network continues to grow at a rapid pace, many strategic technologies have evolved on the Internet platform, such as Internet of Things (IoT), Cloud Computing, and Big Data. IoT is the network of objects incorporated with electronics, sensors, and software, which allows objects to be sensed and controlled remotely as well as useful information to be collected and exchanged across existing Internet infrastructure. Therefore, many advanced applications associated with intelligent identification, locating, tracking, monitoring, and managing can be developed with IoT. Recently, due to the development and application of radio frequency identification technology increasing rapidly, the near field communication (NFC) reader is embedded in most new cell phones, making these devices more suitable for IoT applications.This study employs IoT, NFC, and QR Code technologies, as well as devices of Android cell phone, Arduino microcontroller, and Raspberry Pi microcomputer to develop a locker system with NFC tags. By introducing the IoT paradigm, this system is enhanced with efficiency, convenience, and security, thus overcoming the drawbacks of traditional lockers. In the system, two kinds of tags are provided, where one is the primary NFC tags and the other the backup QR Code tags. After a user downloads and installs the APP written by the author to his cell phone, he can rent a locker by reading the NFC tag attached to that locker with his phone, and experience the use of a more efficient, convenient, and secure locker system.
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Huang, Chung-Hau, and 黃重浩. "Surface-acoustic wave radio frequency identification system- design for tags." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/qfrkx9.
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碩士<br>國立中興大學<br>物理學系所<br>101<br>Radio frequency identification (RFID) system is to use wireless communication to transfer data from a tag for identification and tracking. Unlike conventional IC tags, surface acoustic wave(SAW) tags can be applied as fully passive tags in a RFID system. Here we report a work on SAW RFID tags focus on the 2.45GHz communication frequency. The electromagnetic waves were received and transmitted via panel antenna array, fabricated on ceramics/glass composite circuit board. The radiation pattern of a panel antenna is directive, appropriate for point-to-point transmission. SAW tags were made on 128°Y-X cut lithium niobate (LiNbO3) substrate, which is a well-known piezoelectric material. The incident electromagnetic waves, received by the antenna were transduced to Rayleigh waves on the substrate surface. As propagating on the surface, these Rayleigh waves may be reflected by reflectors. We applied pulse position coding scheme for identification: by tracing the time delay from the reflectors, one can identify the tag. Here we reported two methods to measure our tags. One is the time domain results converted from frequency domain data by inverse Fourier transform. The other is time domain directed measured by homodyne method.
The panel antenna array has a frequency of 2.4GHz, a return loss of -27dB, and a gain of 11 dBi. The SAW chip has a frequency of 2.51GHz, a return loss of -15dB. With a metallization of 25%, the reflectors have transmittance of 0.76 and reflectance of 0.24. All reflection pluses could be discerned for a tag coded by 1001110101 both by inverse Fourier transform method and by homodyne method.
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Yu, Pei-lun, and 余沛倫. "Combining Social Information and Emotional Tags for Music Recommender System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/82541385358339649737.
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碩士<br>國立高雄大學<br>資訊管理學系碩士班<br>103<br>Music become more and more genre. The compression technology of music is getting stronger. People started to use digital music. Digital music becomes the major part of income in the music industry and the music industry started to take it serious. Providing a great online music service become an important goal. The music recommender system was created for finding out user’s music interest initiatively. In the other side, the social network sites become more and more popular. The social network sites have lots of user’s information therefore we want to use those social network data to improve the music recommender system.
In this research, we proposed a method based on social network and emotional tags to recommend music. We found that using users likes of music pages to recommend music got the best rating than other users’ social data. Also found out there is data imbalance in social network data and music data.