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Dissertations / Theses on the topic 'Adaptive IDS'

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Published: 4 June 2021
Last updated: 3 February 2022

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1

Bojanic, Irena. "On-line adaptive IDS scheme for detecting unknown network attacks using HMM models." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2571.

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Thesis (M.S.) -- University of Maryland, College Park, 2005.
Thesis research directed by: Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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2

Techateerawat, Piya, and piyat33@yahoo com. "Key distribution and distributed intrusion detection system in wireless sensor network." RMIT University. Electrical and Computer Systems Engineering, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080729.162610.

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This thesis proposes a security solution in key management and Intrusion Detection System (IDS) for wireless sensor networks. It addresses challenges of designing in energy and security requirement. Since wireless communication consumes the most energy in sensor network, transmissions must be used efficiently. We propose Hint Key Distribution (HKD) for key management and Adaptive IDS for distributing activated IDS nodes and cooperative operation of these two protocols. HKD protocol focuses on the challenges of energy, computation and security. It uses a hint message and key chain to consume less energy while self-generating key can secure the secret key. It is a proposed solution to key distribution in sensor networks. Adaptive IDS uses threshold and voting algorithm to distribute IDS through the network. An elected node is activated IDS to monitor its network and neighbors. A threshold is used as a solution to reduce number of repeated activations of the same node. We attempt to distribute the energy use equally across the network. In a cooperative protocol, HKD and Adaptive IDS exchange information in order to adjust to the current situation. The level of alert controls the nature of the interaction between the two protocols.
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Salah, Ben Romdhane Mohamed. "Design synthesis of application-specification ICs for DSP." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/15392.

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4

Popayán, Avila Jhossep Augusto. "Contributions to ida-pbc with adaptive control for underactuated mechanical systems." Master's thesis, Pontificia Universidad Católica del Perú, 2018. http://tesis.pucp.edu.pe/repositorio/handle/123456789/12894.

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This master thesis is devoted to developing an adaptive control scheme for the well- known Interconnection and Damping Assignment Passivity-Based Control (IDA-PBC) technique. The main objective of this adaptive scheme is to asymptotically stabilize a class of Underactuated Mechanical Systems (UMSs) in the presence of uncertainties (not necessarily matched). This class of UMSs is characterized by the solvability of the Partial Differential Equation (PDE) resulting from the IDA-PBC technique. Two propositions are stated in this work to design the adaptive IDA-PBC. One of the main properties of these propositions is that even though the parameter estimation conver- gence is not guaranteed, the adaptive IDA-PBC achieves asymptotic stabilization. To illustrate the effectiveness of these propositions, this work performs simulations of the Inertia Wheel Inverted Pendulum (IWIP) system, considering a time-dependent input disturbance, a type of physical damping, i.e., friction (not considered in the standard IDA-PBC methodology), and parameter uncertainties in the system (e.g., inertia).
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5

Miller, Nathan D. "Adapting the Skyline Operator in the NetFPGA Platform." Youngstown State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1369586333.

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6

Montagut, Climent Mario Alberto. "DESIGN, DEVELOPMENT AND EVALUATION OF AN ADAPTIVE AND STANDARDIZED RTP/RTCP-BASED IDMS SOLUTION." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/48549.

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Nowadays, we are witnessing a transition from physical togetherness towards networked togetherness around media content. Novel forms of shared media experiences are gaining momentum, allowing geographically distributed users to concurrently consume the same media content while socially interacting (e.g., via text, audio or video chat). Relevant use cases are, for example, Social TV, networked games and multi-party conferencing. However, realizing enjoyable shared media services faces many challenges. In particular, a key technological enabler is the concurrent synchronization of the media playout across multiple locations, which is known as Inter-Destination Multimedia Synchronization (IDMS). This PhD thesis presents an inter-operable, adaptive and accurate IDMS solution, based on extending the capabilities of RTP/RTCP standard protocols (RFC 3550). Concretely, two new RTCP messages for IDMS have been defined to carry out the necessary information to achieve IDMS. Such RTCP extensions have been standardized within the IETF, in RFC 7272. In addition, novel standard-compliant Early Event-Driven (EED) RTCP feedback reporting mechanisms have been also designed to enhance the performance in terms of interactivity, flexibility, dynamism and accuracy when performing IDMS. The designed IDMS solution makes use of globally synchronized clocks (e.g., using NTP) and can adopt different (centralized and distributed) architectural schemes to exchange the RTCP messages for IDMS. This allows efficiently providing IDMS in a variety of networked scenarios and applications, with different requirements (e.g., interactivity, scalability, robustness…) and available resources (e.g., bandwidth, latency, multicast support…). Likewise, various monitoring and control algorithms, such as dynamic strategies for selecting the reference timing to synchronize with, and fault tolerance mechanisms, have been added. Moreover, the proposed IDMS solution includes a novel Adaptive Media Playout (AMP) technique, which aims to smoothly adjust the media playout rate, within perceptually tolerable ranges, every time an asynchrony threshold is exceeded. Prototypes of the IDMS solution have been implemented in both a simulation and in real media framework. The evaluation tests prove the consistent behavior and the satisfactory performance of each one of the designed components (e.g.,protocols, architectural schemes, master selection policies, adjustment techniques…). Likewise, comparison results between the different developed alternatives for such components are also provided. In general, the obtained results demonstrate the ability of this RTP/RTCP-based IDMS solution to concurrently and independently maintain an overall synchronization status (within allowable limits) in different logical groups of users, while avoiding annoying playout discontinuities and hardly increasing the computation and traffic load.
Montagut Climent, MA. (2015). DESIGN, DEVELOPMENT AND EVALUATION OF AN ADAPTIVE AND STANDARDIZED RTP/RTCP-BASED IDMS SOLUTION [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/48549
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7

Margelou, Dimitra. "Indoor thermal comfort and associated adaptive measures towards an energy efficient new campus in Borlänge, Sweden." Thesis, Högskolan Dalarna, Energiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:du-34556.

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Thermal comfort of the occupants is of highest importance specifically in Scandinavian countries. Especially for an educational building, both students and working staff spend most of their time indoors, therefore it is critical to guarantee a healthy and productive indoor climate environment around a whole year. Taking into account that Högskolan Dalarna plans to move into a newly renovated building in the center of Borlänge in 2022, this thesis focus on this essential topic and tries to dig out some valuable adaptive suggestions for the coming schematic design phase. In the next design phase, it aims to satisfy design requirements of Miljöbyggnad 3.0 certification at sliver level, as well as operation requirements of BREEAM InUse at very good level. Consequently, the aim of this thesis project is to have an overall thermal comfort assessment of all representative rooms in the project of the new campus building in Borlänge, Sweden. The thermal comfort assessment consists of both winter situation and summer situation. Both situations are completely under recommended study method from Miljöbyggnad 3.0 with the technical assistant of dynamic building simulation software tool IDA ICE 4.8. Several aspects have been investigated in terms of indoor thermal comfort. The first impacting element is future climate scenarios, so as to check how the future climate will affect the thermal comfort performance. Afterwards, both external and internal shading devices were individually applied to examine and quantify the benefits in terms of indoor thermal comfort. Lastly, the advanced control shading strategies were studied to further improve the thermal comfort performance based on the appropriate conventional shading method. The results showed that future climate scenario has limited impact on the thermal comfort performance when rooms are under temperature controlled via room heating and cooling units. Regarding the shading methods, the internal shading was proved to give a better overall performance. If there is the chance to implement automation shading device, the author recommends the “zone air temperature with operative temperature setpoint 21°C, in which proved to be significantly improved the thermal comfort levels that previously discovered in the vulnerable zones. Therefore, it is expected significantly to reduce the energy dependency during cooling season.
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Dennison, Kaitlin, S. Mark Ammons, Vincent Garrel, Eduardo Marin, Gaetano Sivo, Eduardo Bendek, and Oliver Guyon. "An engineered design of a diffractive mask for high precision astrometry." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622011.

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AutoCAD, Zemax Optic Studio 15, and Interactive Data Language (IDL) with the Proper Library are used to computationally model and test a diffractive mask (DiM) suitable for use in the Gemini Multi-Conjugate Adaptive Optics System (GeMS) on the Gemini South Telescope. Systematic errors in telescope imagery are produced when the light travels through the adaptive optics system of the telescope. DiM is a transparent, flat optic with a pattern of miniscule dots lithographically applied to it. It is added ahead of the adaptive optics system in the telescope in order to produce diffraction spots that will encode systematic errors in the optics after it. Once these errors are encoded, they can be corrected for. DiM will allow for more accurate measurements in astrometry and thus improve exoplanet detection. The mechanics and physical attributes of the DiM are modeled in AutoCAD. Zemax models the ray propagation of point sources of light through the telescope. IDL and Proper simulate the wavefront and image results of the telescope. Aberrations are added to the Zemax and IDL models to test how the diffraction spots from the DiM change in the final images. Based on the Zemax and IDL results, the diffraction spots are able to encode the systematic aberrations.
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9

Tabler, John A. "An integrated adaptive bias solution for zero passive component count high-performance mixed-signal ICs." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13339.

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10

Boss, John. "Adaptive evolution of Transcription Factors in European and wine yeast." Thesis, Södertörn University College, School of Life Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-3263.

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The mutability of transcription factors (TF) is thought to be of high importance for the evolutionary change of living organisms. Transcription factors, coactivators, coregulators, kinases, chromatin remodelers conditional factors and other proteins together govern the timing and level of gene expression. About 10% of the genes in the human genome are predicted to be TFs and mutational changes in these genes or in the target regulatory sequences they bind will potentially give rise to evolutionary advantages or malfunctions for the organism. Recent research has suggested that the parts of the transcription factors that are not structurally defined in solution, so called intrinsically disordered regions (IDRs), have a higher potential for evolutionary diversification than more structurally rigid regions. This suggests that these domains that earlier have been considered mostly unimportant may have an important potential for evolutionary diversification. This project aimed to further evaluate evidence supporting the hypothesis that variable-structured domains in transcription factors are of significant importance for functional diversification. This was be done by comparing the rate of synonymous and non-synonymous genetic variation in the coding regions of 12 selected TFs within a highly conserved clade of European wine yeasts and by comparing this variation to divergent phenotypic patterns within the strains. The frequency of non-synonymous mutations was much greater than for synonymous mutations indicating an important role of positive selection acting on these TFs during diversification of the different strains. No significant connections were discovered between the distribution of DNA variation and phenotypic patterns.

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11

Müller, Torsten. "Die adaptive patientenkontrollierte Analgesie - ein Beitrag zur individualisierten postoperativen Schmerztherapie klinischer Vergleich der adaptiven patientenkontrollierten Analgesie (APCA) mit einem konventionellen System zur patientenkontrollierten Analgesie /." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964901927.

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12

Dolog, Peter. "Engineering adaptive web applications." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=979755220.

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13

Eberle, Stephan. "Adaptive Internetanbindung von Feldbussystemen." Aachen : Shaker, 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975655434.

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Weiss, Alexander Robert. "Point spread function reconstruction for the adaptive optics system ALFA and its application to photometry." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=967776759.

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15

Funai, Naoki. "Essays on adaptive learning." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4494/.

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This thesis consists of three interrelated chapters on adaptive learning. In each chapter, I investigate the way in which adaptive decision makers/players behave in the long run. In particular, I consider subjective assessment maximizers; each player assigns a subjective assessment to each of his actions based on its past performance and chooses the action which has the highest assessment. They update their assessments adaptively using realized payoffs. I mainly focus on the following three cases; (1) an adaptive decision maker takes into account not only direct payoff information, but also foregone payoff information; (2) adaptive players face a normal form game with strict Nash equilibrium in each of infinitely many periods; and (3) adaptive players face a finitely repeated game in each of infinitely iterated periods. Then I show the conditions under which (1) adaptive decision maker chooses the optimal action, (2) adaptive players end up choosing Nash equilibrium strategies, and (3) adaptive players’ behavioural strategies converge to an agent quantal response equilibrium, which is a quantal response equilibrium for extensive form games.
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Wulff, Markus, and Herwig Unger. "Adaptive Datenverwaltung im Internet." Josef Eul Verlag GmbH, 2001. https://tud.qucosa.de/id/qucosa%3A28775.

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Aus der Einführung: "Mit der ständig wachsenden Bedeutung des Internets als Medium für Kommunikation und Datenverarbeitung werden auch Qualitätsmerkmale wie Verfügbarkeit, Zuver-lässigkeit und Sicherheit immer wichtiger. Das gilt insbesondere für die Anwendung im Rahmen des e-Business und anderer kommerzieller Anwendungen [13]."
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17

Langguth, Torsten. "Adaptive Dienstgütesteuerung bei leitungsgebundenen Mehrträgersystemen." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=979059259.

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Holzapfel, Florian. "Nichtlineare adaptive Regelung eines unbemannten Fluggerätes." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973069066.

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Wang, Xin. "Kompakte Mehrtorantennen für die adaptive Keulenformung." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972437495.

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Mercurio, Danilo. "Adaptive estimation for financial time series." Doctoral thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972597263.

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Bangalore, Manjunathamurthy Nagachetan. "Adaptive object segmentation and tracking." Thesis, University of Sussex, 2012. http://sro.sussex.ac.uk/id/eprint/38562/.

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Efficient tracking of deformable objects moving with variable velocities is an important current research problem. In this thesis a robust tracking model is proposed for the automatic detection, recognition and tracking of target objects which are subject to variable orientations and velocities and are viewed under variable ambient lighting conditions. The tracking model can be applied to efficiently track fast moving vehicles and other objects in various complex scenarios. The tracking model is evaluated on both colour visible band and infra-red band video sequences acquired from the air by the Sussex police helicopter and other collaborators. The observations made validate the improved performance of the model over existing methods. The thesis is divided in three major sections. The first section details the development of an enhanced active contour for object segmentation. The second section describes an implementation of a global active contour orientation model. The third section describes the tracking model and assesses it performance on the aerial video sequences. In the first part of the thesis an enhanced active contour snake model using the difference of Gaussian (DoG) filter is reported and discussed in detail. An acquisition method based on the enhanced active contour method developed that can assist the proposed tracking system is tested. The active contour model is further enhanced by the use of a disambiguation framework designed to assist multiple object segmentation which is used to demonstrate that the enhanced active contour model can be used for robust multiple object segmentation and tracking. The active contour model developed not only facilitates the efficient update of the tracking filter but also decreases the latency involved in tracking targets in real-time. As far as computational effort is concerned, the active contour model presented improves the computational cost by 85% compared to existing active contour models. The second part of the thesis introduces the global active contour orientation (GACO) technique for statistical measurement of contoured object orientation. It is an overall object orientation measurement method which uses the proposed active contour model along with statistical measurement techniques. The use of the GACO technique, incorporating the active contour model, to measure object orientation angle is discussed in detail. A real-time door surveillance application based on the GACO technique is developed and evaluated on the i-LIDS door surveillance dataset provided by the UK Home Office. The performance results demonstrate the use of GACO to evaluate the door surveillance dataset gives a success rate of 92%. Finally, a combined approach involving the proposed active contour model and an optimal trade-off maximum average correlation height (OT-MACH) filter for tracking is presented. The implementation of methods for controlling the area of support of the OT-MACH filter is discussed in detail. The proposed active contour method as the area of support for the OT-MACH filter is shown to significantly improve the performance of the OT-MACH filter's ability to track vehicles moving within highly cluttered visible and infra-red band video sequences.
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Hammond, Simon P. "Adaptive scaling of evolvable systems." Thesis, University of Birmingham, 2007. http://etheses.bham.ac.uk//id/eprint/121/.

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Neo-Darwinian evolution is an established natural inspiration for computational optimisation with a diverse range of forms. A particular feature of models such as Genetic Algorithms (GA) [18, 12] is the incremental combination of partial solutions distributed within a population of solutions. This mechanism in principle allows certain problems to be solved which would not be amenable to a simple local search. Such problems require these partial solutions, generally known as building-blocks, to be handled without disruption. The traditional means for this is a combination of a suitable chromosome ordering with a sympathetic recombination operator. More advanced algorithms attempt to adapt to accommodate these dependencies during the search. The recent approach of Estimation of Distribution Algorithms (EDA) aims to directly infer a probabilistic model of a promising population distribution from a sample of fitter solutions [23]. This model is then sampled to generate a new solution set. A symbiotic view of evolution is behind the recent development of the Compositional Search Evolutionary Algorithms (CSEA) [49, 19, 8] which build up an incremental model of variable dependencies conditional on a series of tests. Building-blocks are retained as explicit genetic structures and conditionally joined to form higher-order structures. These have been shown to be effective on special classes of hierarchical problems but are unproven on less tightly-structured problems. We propose that there exists a simple yet powerful combination of the above approaches: the persistent, adapting dependency model of a compositional pool with the expressive and compact variable weighting of probabilistic models. We review and deconstruct some of the key methods above for the purpose of determining their individual drawbacks and their common principles. By this reasoned approach we aim to arrive at a unifying framework that can adaptively scale to span a range of problem structure classes. This is implemented in a novel algorithm called the Transitional Evolutionary Algorithm (TEA). This is empirically validated in an incremental manner, verifying the various facets of the TEA and comparing it with related algorithms for an increasingly structured series of benchmark problems. This prompts some refinements to result in a simple and general algorithm that is nevertheless competitive with state-of-the-art methods.
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23

Pannekamp, Jens. "Adaptive Verfahren zur Bewertung texturierter Oberflächen." Heimsheim Jost-Jetter, 2004. http://deposit.d-nb.de/cgi-bin/dokserv?idn=974952575.

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Oestmann, Stephan. "Fehlerkontrollierte adaptive FEM-BEM Kopplungsmethoden und Anwendungen." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=979445523.

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Nagaiah, Chamakuri. "Adaptive numerical simulation of reaction-diffusion systems." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985277882.

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Pfeifer, Thomas. "Adaptive control of coherent soft x-rays." Doctoral thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=976064227.

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Müller, Andreas. "Objektorientierte Strukturen für adaptive Multilevelverfahren zur Strömungssimulation." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=959982523.

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Ertel, Susanne. "Adaptive Positionierung von Modellrändern in heterogenen Gebietszerlegungsverfahren." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=970780931.

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Feiler, Matthias J. "Adaptive control in the presence of disturbances." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97276691X.

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Barinka, Arne. "Fast computation tools for adaptive wavelet schemes." kostenfrei, 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=97443079X.

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31

Zschaler, Gerd. "Adaptive-network models of collective dynamics." Doctoral thesis, Max-Planck-Institut für Physik komplexer Systeme, 2011. https://tud.qucosa.de/id/qucosa%3A26056.

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Complex systems can often be modelled as networks, in which their basic units are represented by abstract nodes and the interactions among them by abstract links. This network of interactions is the key to understanding emergent collective phenomena in such systems. In most cases, it is an adaptive network, which is defined by a feedback loop between the local dynamics of the individual units and the dynamical changes of the network structure itself. This feedback loop gives rise to many novel phenomena. Adaptive networks are a promising concept for the investigation of collective phenomena in different systems. However, they also present a challenge to existing modelling approaches and analytical descriptions due to the tight coupling between local and topological degrees of freedom. In this thesis, I present a simple rule-based framework for the investigation of adaptive networks, using which a wide range of collective phenomena can be modelled and analysed from a common perspective. In this framework, a microscopic model is defined by the local interaction rules of small network motifs, which can be implemented in stochastic simulations straightforwardly. Moreover, an approximate emergent-level description in terms of macroscopic variables can be derived from the microscopic rules, which we use to analyse the system\'s collective and long-term behaviour by applying tools from dynamical systems theory. We discuss three adaptive-network models for different collective phenomena within our common framework. First, we propose a novel approach to collective motion in insect swarms, in which we consider the insects\' adaptive interaction network instead of explicitly tracking their positions and velocities. We capture the experimentally observed onset of collective motion qualitatively in terms of a bifurcation in this non-spatial model. We find that three-body interactions are an essential ingredient for collective motion to emerge. Moreover, we show what minimal microscopic interaction rules determine whether the transition to collective motion is continuous or discontinuous. Second, we consider a model of opinion formation in groups of individuals, where we focus on the effect of directed links in adaptive networks. Extending the adaptive voter model to directed networks, we find a novel fragmentation mechanism, by which the network breaks into distinct components of opposing agents. This fragmentation is mediated by the formation of self-stabilizing structures in the network, which do not occur in the undirected case. We find that they are related to degree correlations stemming from the interplay of link directionality and adaptive topological change. Third, we discuss a model for the evolution of cooperation among self-interested agents, in which the adaptive nature of their interaction network gives rise to a novel dynamical mechanism promoting cooperation. We show that even full cooperation can be achieved asymptotically if the networks\' adaptive response to the agents\' dynamics is sufficiently fast.
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Henker, Ronny, Jan Pliva, Mahdi Khafaji, Frank Ellinger, Thomas Toifl, Bert Offrein, Alessandro Cevrero, et al. "Adaptive optical interconnects: The ADDAPT project." SPIE, 2015. https://tud.qucosa.de/id/qucosa%3A34793.

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Existing optical networks are driven by dynamic user and application demands but operate statically at their maximum performance. Thus, optical links do not offer much adaptability and are not very energy-effcient. In this paper a novel approach of implementing performance and power adaptivity from system down to optical device, electrical circuit and transistor level is proposed. Depending on the actual data load, the number of activated link paths and individual device parameters like bandwidth, clock rate, modulation format and gain are adapted to enable lowering the components supply power. This enables exible energy-efficient optical transmission links which pave the way for massive reductions of CO2 emission and operating costs in data center and high performance computing applications. Within the FP7 research project Adaptive Data and Power Aware Transceivers for Optical Communications (ADDAPT) dynamic high-speed energy-efficent transceiver subsystems are developed for short-range optical interconnects taking up new adaptive technologies and methods. The research of eight partners from industry, research and education spanning seven European countries includes the investigation of several adaptive control types and algorithms, the development of a full transceiver system, the design and fabrication of optical components and integrated circuits as well as the development of high-speed, low-loss packaging solutions. This paper describes and discusses the idea of ADDAPT and provides an overview about the latest research results in this field.
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Philipp, Katrin, Florian Lemke, Matthias C. Wapler, Ulrike Wallrabe, Nektarios Koukourakis, and Jürgen W. Czarske. "Spherical aberration correction of adaptive lenses." SPIE, 2017. https://tud.qucosa.de/id/qucosa%3A34878.

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Deformable mirrors are the standard adaptive optical elements for aberration correction in confocal microscopy. Their usage leads to increased contrast and resolution. However, these improvements are achieved at the cost of bulky optical setups. Since spherical aberrations are the dominating aberrations in confocal microscopy, it is not required to employ all degrees of freedom commonly offered by deformable mirrors. In this contribution, we present an alternative approach for aberration correction in confocal microscopy based on a novel adaptive lens with two degrees of freedom. These lenses enable both axial scanning and aberration correction, keeping the setup simple and compact. Using digital holography, we characterize the tuning range of the focal length and the spherical aberration correction ability of the adaptive lens. The operation at fixed trajectories in terms of focal length and spherical aberrations is demonstrated and investigated in terms of reproducibility. First results indicate that such adaptive lenses are a promising approach towards high-resolution, high-speed three-dimensional microscopy.
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Koukourakis, N., B. Fregin, L. Büttner, and J. W. Czarske. "Adaptive wavefront shaping for flowfield measurements." SPIE, 2016. https://tud.qucosa.de/id/qucosa%3A35058.

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In this contribution we use wavefront shaping approaches for image correlation based flow-field measurements for the first time. Aberrations introduced by a single phase boundary in the detection beam path were explored. Variations of the optical path-length result in strong errors in position allocation and thus to an enhancement of the measurement uncertainty of the velocity. Our results show that the usage of wavefront shaping enables to reduce these errors and to strongly improve the quality of image correlation based flow-field measurements. First experimental and simulated results underline the importance of these approaches.
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Laßmann, Paula, Jonathan Kießling, Stephan Mayer, Benedikt Janny, and Thomas Maier. "aHa – Der adaptive Handgriff der Zukunft." Thelem Universitätsverlag & Buchhandlung GmbH & Co. KG, 2019. https://tud.qucosa.de/id/qucosa%3A36944.

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Über die Gestalt eines optimalen Handgriffs hat sich Wilhelm Emil Fein als Erfinder der handgeführten Bohrmaschinen bereits vor hundert Jahren Gedanken gemacht (Schmid & Maier 2017). Der spanische Architekt Gaudì passte die Fenstergriffe im Casa Battlò in Barcelona Anfang des 20. Jahrhunderts der Handform an, die heute als antropomorphe Gegenform in der Forschung bekannt ist und im Griffdesign angestrebt wird (Schmid & Maier 2017). Die anthropomorphe Gegenform stellt das Pendant zu körpereigenen Formen dar und ermöglicht somit eine Maximierung der Kontaktfläche bei einer Minimierung der Flächenpressung. Die Vorteile hierbei sind eine gute Kraftübertragung bei geringer Druckstellenbildung. Bei einem nicht adaptiven Griff würde dessen Form verschiedene Hände in verschiedenen Nutzungsszenarien in ungewünschte Zwangshaltungen bringen, weswegen eine optimale Form nur durch einen adaptiven Griff sichergestellt werden kann. Aufgrund der unterschiedlichen Topographie von Händen ermöglicht ein individueller Griff die beste Kraftübertragung und einen idealen Komfort. Dementsprechend ist das Optimum ein kontinuierlich adaptiver Griff, den es bisher nicht auf dem Markt gibt (s. Stand der Forschung). Aufbauend auf einem beantragten Patent wird ein Demonstrator eines solchen Griffs entworfen. Dabei wird in der Einleitung auf die Problemstellung der Griffgrößen eingegangen, sowie der gewählte Anwendungsfall hergeleitet. Im Anschluss wird der Stand der Forschung erarbeitet. Darauffolgend wird auf die methodische Vorgehensweise sowie auf die konstruierten Prototypen eingegangen. Eine Diskussion und Ausblick runden den Beitrag ab. [... aus der Einleitung]
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36

Morley, L. "Niche-adaptive evolution in Campylobacter jejuni." Thesis, Nottingham Trent University, 2014. http://irep.ntu.ac.uk/id/eprint/27913/.

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Campylobacter jejuni is the leading causative agent of human bacterial gastroenteritis. Human C. jejuni infection (campylobacteriosis) is frequently associated with poultry; through consumption of undercooked products, cross contamination from raw meats, or through direct contact with birds or their faecal matter, however it is established that poultry is not the sole cause of C. jejuni infection in humans. This research reveals new information on the MLST ST403 Clonal Complex, a previously identified C. jejuni lineage associated with the porcine host. ST403CC C. jejuni have also been linked with other mammalian hosts to a lesser degree, and have been implicated in human campylobacteriosis, however to date this clonal complex has not been linked to poultry. The original hypothesis of this research predicted that due to sharing a host niche commonly associated with C. coli, the porcine ST403CC may show evidence of increased recombination with C. coli, however this was not observed. Six ST403CC isolates of porcine origin were subjected to phenotype testing and whole genome sequencing; these isolates were capable of invasion in vitro, and were revealed both to have acquired seemingly lineage specific content, in the form of Restriction-Modification (R-M) system associated genes, and to have undergone degredation of certain loci. The ST403CC isolates also exhibited a distinct pattern of reduced genomic recombination compared to non-ST403CC C. jejuni, with evidence of lineage specific recombination events. Both generalist & specialist lineages have previously been revealed in C. jejuni. The research presented here identifies a new specialist lineage which is associated with mammalian hosts, and not found in poultry.
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37

Billings, Deborah. "ADAPTIVE FEEDBACK IN SIMULATION-BASED TRAINING." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2454.

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Feedback is essential to guide performance in simulation-based training (SBT) and to refine learning. Generally outcomes improve when feedback is delivered with personalized tutoring that tailors specific guidance and adapts feedback to the learner in a one-to-on environment. Therefore, emulating by automation these adaptive aspects of human tutors in SBT systems should be an effective way to train individuals. This study investigates the efficacy of automating different types of feedback in a SBT system. These include adaptive bottom-up feedback (i.e., detailed feedback, changing to general as proficiency develops) and adaptive top-down feedback (i.e., general feedback, changing to detailed if performance fails to improve). Other types of non-adaptive feedback were included for performance comparisons as well as to examine the overall cognitive load. To test hypotheses, 130 participants were randomly assigned to five conditions. Two feedback conditions employed adaptive approaches (bottom-up and top-down), two used non-adaptive approaches (constant detailed and constant general), and one functioned as a control group (i.e., only a performance score was given). After preliminary training on the simulator system, participants completed four simulated search and rescue missions (three training missions and one transfer mission). After each training mission, all participants received feedback relative to the condition they were assigned. Overall performance on missions, knowledge post-test scores, and subjective cognitive load were measured and analyzed to determine the effectiveness of the type of feedback. Results indicate that: (1) feedback generally improves performance, confirming prior research; (2) performance for the two adaptive approaches (bottom-up vs. top-down did not differ significantly at the end of training, but the bottom-up group achieved higher performance levels significantly sooner; (3) performance for the bottom-up and constant detailed groups did not differ significantly, although the trend suggests that adaptive bottom-up feedback may yield significant results in further studies. Overall, these results have implications for the implementation of feedback in SBT and beyond for other computer-based training systems.
Ph.D.
Department of Psychology
Sciences
Psychology PhD
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38

Chen, Jingjing. "Multiplicity Adjustments in Adaptive Design." Diss., Temple University Libraries, 2012. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/165453.

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Statistics
Ph.D.
There are a number of available statistical methods for adaptive designs, among which the combination method of Bauer and Kohne's (1994) is well known and widely used. In this work, we revisit the the Bauer-Kohne method in three ways: overall FWER control for single-hypothesis in a two-stage adaptive design, overall FWER control for two-hypothesis in a two-stage adaptive design, and overall FDR control for multiple-hypothesis in a two-stage adaptive design. We first take the Bauer-Kohne method in a more direct manner to have more flexibility in the choice of the early rejection and acceptance boundaries as well as the second stage critical value based on the chosen combination function. Our goal is not to develop a new method, but focus primarily on developing a comprehensive understanding of two-stage designs. Rather than tying up the early rejection and acceptance boundaries by considering the second stage critical value to be the same as that of the level á combination test, as done in the original Bauer-Kohne method, we allow the second-stage critical value to be determined from prefixed early rejection and acceptance boundaries. An explicit formula is derived for the overall Type I error probability to determine the second stage critical value from these stopping boundaries not only for Fisher's combination function but also for other types of combination function. Tables of critical values corresponding to several different choices of early rejection and acceptance boundaries and these combination functions are presented. A dataset from a clinical study is used to apply the different methods based on directly computed second stage critical values from pre fixed stopping boundaries and discuss the outcomes in relation to those produced by the original Bauer-Kohne method. We then extend the Bauer-Kohne method to two-hypothesis setting and propose a stepwise-combination method for a two-stage adaptive design. In particular, we modify Holm's step-down procedure (1979) and suggest a step-down combination method to control the overall FWER at a desired level á. In many scientific studies requiring simultaneous testing of multiple null hypotheses, it is often necessary to carry out the multiple testing in two stages to decide which of the hypotheses can be rejected or accepted at the first stage and which should be followed up for further testing having combined their p-values from both stages. Unfortunately, no multiple testing procedure is available yet to perform this task meeting pre-specified boundaries on the first-stage p-values in terms of the false discovery rate (FDR) and maintaining a control over the overall FDR at a desired level. Our third goal in this work is to present two procedures, extending the classical Benjamini-Hochberg (BH) procedure and its adaptive version incorporating an estimate of the number of true null hypotheses from single-stage to a two-stage setting. These procedures are theoretically proved to control the overall FDR when the pairs of first- and second-stage p-values are independent and those corresponding to the null hypotheses are identically distributed as a pair (p1, p2) satisfying the p-clud property of Brannath, Posch and Bauer (2002, Journal of the American Statistical Association, 97, 236 -244). We consider two types of combination function, Fisher's and Simes', and present explicit formulas involving these functions towards carrying out the proposed procedures based on pre-determined critical values or through estimated FDR's. Simulations were carried to compare the proposed methods with class BH procedure using first stage data only and full data from both stages respectively. Our simulation studies indicate that the proposed procedures can have significant power improvement over the single-stage BH procedure based on the first stage data, at least under independence, and can continue to control the FDR under some dependence situations. Application of the proposed procedures to a real gene expression data set produces more discoveries compared to the single-stage BH procedure using the first stage data and full data as well.
Temple University--Theses
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39

Vogt, Gerhard Sebastian. "Adaptive Femtosekunden-Quantenkontrolle komplexer Moleküle in kondensierter Phase." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982191359.

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40

Becker, Wolfgang. "Dynamische adaptive Lastbalancierung für grosse, heterogen konkurrierende Anwendungen." [S.l. : s.n.], 1995. http://deposit.ddb.de/cgi-bin/dokserv?idn=95692509X.

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41

Henze, Nicola. "Adaptive hyperbooks: adaptation for project-based learning resources." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=959579044.

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42

Vexler, Boris. "Adaptive finite element methods for parameter identification problems." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971435170.

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43

Majidi, Mohammad. "Adaptive Finite-Element-Ausgleichsformulierungen für parabolische Anfangs-Randwertaufgaben." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965255816.

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44

Guddat, Martin. "Autonome, adaptive Bewegungskoordination von Gehmaschinen in komplexer Umgebung." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=966303652.

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45

Krampert, Gerhard. "Femtosecond quantum control and adaptive polarization pulse shaping." Doctoral thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97440814X.

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46

Salama, Maria Mourad Ebeid Meleka. "Architectural stability of self-adaptive software systems." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8667/.

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This thesis studies the notion of stability in software engineering with the aim of understanding its dimensions, facets and aspects, as well as characterising it. The thesis further investigates the aspect of behavioural stability at the architectural level, as a property concerned with the architecture's capability in maintaining the achievement of expected quality of service and accommodating runtime changes, in order to delay the architecture drifting and phasing-out as a consequence of the continuous unsuccessful provision of quality requirements. The research aims to provide a systematic and methodological support for analysing, modelling, designing and evaluating architectural stability. The novelty of this research is the consideration of stability during runtime operation, by focusing on the stable provision of quality of service without violations. As the runtime dimension is associated with adaptations, the research investigates stability in the context of self-adaptive software architectures, where runtime stability is challenged by the quality of adaptation, which in turn affects the quality of service. The research evaluation focuses on the effectiveness, scale and accuracy in handling runtime dynamics, using the self-adaptive cloud architectures.
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47

Czarske, Jürgen W., Nektarios Koukourakis, Bob Fregin, Jörg König, and Lars Büttner. "Adaptive flow-field measurements using digital holography." SPIE, 2017. https://tud.qucosa.de/id/qucosa%3A35119.

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Variations of the optical detection path-length in image correlation based flow-field measurements result in strong errors in position allocation and thus lead to a strong enhancement of the measurement uncertainty of the velocity. In this contribution we use digital holography to measure the wavefront distortion induced by fluctuating phase boundary, employing spatially extended guide stars. The measured phase information is used to correct the influence of the phase boundary in the detection path employing a spatial light modulator. We analyze the potential of guide stars that are reflected by the phase boundary, i.e. the Fresnel reflex, and transmitted. Our results show, that the usage of wavefront shaping enables to strongly reduce the measurement uncertainty and to strongly improve the quality of image correlation based flow-field measurements. The approaches presented here are not limited to application in flow measurement, but could be useful for a variety of applications.
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48

Boltes, Maik. "Adaptive Netzvereinfachung auf der Basis des Quadrik-Fehlermaßes." Jülich : Forschungszentrum, Zentralbibliothek, 2004. http://deposit.d-nb.de/cgi-bin/dokserv?idn=973584645.

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49

Vogt, Paul E. "An adaptive multi-scene correlation algorithm." Master's thesis, University of Central Florida, 1988. http://digital.library.ucf.edu/cdm/ref/collection/RTD/id/76421.

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University of Central Florida College of Engineering Thesis
Digital scene matching algorithms have been used in both military and commercial image processing systems for years. The trend toward using multiple sensors in military imaging systems has generated anew interest in real time techniques to accomplish sensor fusion tasks such as field of view alignment. This thesis analyzes methods presently in use and intorduces a novel algorithm that improves scene correlation performance. The focus of the new technique is in the segmentation area, where significant features are extracted from background and clutter. These performance improvements are espeically helpful when the scene contains excessive noise and or lacks detail, a trouble spot for standard correlation systems. The restrictions imposed on the system design include implementations possible for real time porcessing and a minimum of hardware and power consimption. Simulations of the algorithms programmed for an image processing board by an IBM personal computer are discussed.
M.S.
Masters
Engineering
Engineering
79 p.
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50

Weckerle, Martin. "Utilization of correlation matrices in adaptive array processors for time slotted CDMA uplinks." Kaiserslautern : Univ, 2002. http://deposit.d-nb.de/cgi-bin/dokserv?idn=967819091.

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