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Dissertations / Theses on the topic 'Aggregation'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Chen, Fei. "Bacterial auto-aggregation and co-aggregation in activated sludge." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1211384981/.

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2

Bijoux, Jude peter. "Reef fish spawning aggregation sites : the ecology of aggregating and resident species." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4013.

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Les sites d'agrégation de ponte (AP) sont des zones où des poissons d'une même espèce se rassemblent pour frayer. En dépit de leur importance dans la reproduction de nombreuses espèces de poissons des récifs coralliens, bien peu de sites d'AP sont gérés. Le but de cette étude est d'améliorer la compréhension générale sur l'écologie des sites d'AP en vue de faciliter la gestion. L'étude, réalisée aux Seychelles, se concentre sur les individus regroupant sur les sites d'AP pour frayer et aussi sur ceux résidant sur ces sites. La télémétrie acoustique et le recensement visuel sous-marin ont, ici,

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3

HoÌˆfer, Thomas. "Modelling Dictyostelium aggregation." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320227.

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4

Pranami, Gaurav. "Understanding nanoparticle aggregation." [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:3369880.

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5

Brolin, Jonas, and Mikael Hedegren. "Packet Aggregation in Linux." Thesis, Karlstad University, Division for Information Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-1726.

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<p>Voice over IP (VoIP) traffic in a multi-hop wireless mesh network (WMN) suffers from a large overhead due to mac/IP/UDP/RTP headers and time collisions. A consequence of the large overhead is that only a small number of concurrent VoIP calls can be supported in a WMN[17]. Hop-to-hop packet aggregation can reduce network overhead and increase the capacity. Packet aggregation is a concept which combines several small packets, destined to a common next-hop destination, to one large packet. The goal of this thesis was to implement packet aggregation on a Linux distribution and to increase the n

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6

Putau, Aliaksei. "Organocuprate aggregation and reactivity." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-147566.

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7

Rochon, Yvan P. (Yvan Pierre). "Dynamics of neutrophil aggregation." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70210.

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Neutrophil aggregation has been widely evaluated from changes in light transmission. Using direct particle counting, we demonstrated that light transmission does not accurately reflect aggregation, and showed that in contrast to previous reports, newborn neutrophils do not aggregate irreversibly. We developed a flow cytometric technique to measure the kinetics of neutrophil aggregation, including latent times for onset of aggregation, initial forward and reversal rates, and maximal extents of aggregation. The kinetics of neutrophil aggregation were related to changes in initial cell concentrat

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8

Pusch, John J. "Monetary aggregation in Canada." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22623.

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This thesis is an empirical comparison of the relationship between money and other key economic variables and investigates an alternative method of defining money in Canada. Severe theoretical problems with traditional monetary aggregation methods are identified and Divisia aggregates are examined through the use of index number and aggregation theory. Summation and Divisia aggregates are constructed, tested and compared in three critical areas: information content, causality and stability. In particular this thesis investigates whether Divisia money is a potentially useful indicator of econom

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9

Hirose, Iwao. "Equality, priority, and aggregation." Thesis, University of St Andrews, 2004. http://hdl.handle.net/10023/2690.

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In this dissertation, I discuss two distributive principles in moral philosophy: Derek Parfit's Prioritarianism and Egalitarianism. I attempt to defend a version of Egalitarianism, which I call Weighted Egalitarianism. Although Parfit claims that Egalitarianism is subject to what he calls the Levelling Down Objection, I show (a) that my proposed Weighted Egalitarianism is not subject to the Objection, and (b) that it gives priority to the worse off people. The real difference between the two principles lies in how the weight of each person's well-being is determined. Prioritarianism assumes th

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10

Brus, T. "Multimodality, uncertainty and aggregation." Thesis, University of Warwick, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372199.

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11

Couch, Matthew. "Aggregation, sedimentation and compaction." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260616.

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12

Azaga, Rokaya Mohammed Mohammed. "Surfactant aggregation in DESs." Thesis, University of Leicester, 2018. http://hdl.handle.net/2381/43113.

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Deep eutectic solvents (DESs) have attracted significant attention for a wide range of applications including metal deposition, natural product extraction, metal recycling and catalysis. In general they are good at solubilising polar and charged solutes and hence their properties can be tuned. This study aims to investigate how the properties of DESs can be modified by the addition of surfactants. One aim is to understand how and why surfactants aggregate and how their surface activity differs from aqueous solutions. Firstly, the physical properties of three DESs are characterised containing d

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13

Ebanks, Keira C. "Kinetics of Peptide Aggregation." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/31830.

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The most thermodynamically stable biological structure is the cross-beta secondary structure of the "amyloid"or "prion". As a testament to its stability, the amyloid occurs naturally in 2 rare instances: as a mechanism to protect or destroy life. Pathogenic amyloids are the signature of neurological disorders such as Alzheimer's and Parkinson's disease and bovine spongiform encephalopathy (BSE), which have no effective treatments or known cures. Pathogenic amyloids appear as nanometer sized "plaques" that self-assemble over time. The plaques usually are well-organized crystalline/fibrous struc

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14

Schulte, Elisabeth. "Information aggregation in organizations." [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:180-madoc-13540.

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15

Chen, Keji. "Earnings aggregation and valuation." Columbus, OH : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1059674409.

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Thesis (Ph. D.)--Ohio State University, 2003.<br>Title from first page of PDF file. Document formatted into pages; contains xii, 135 p.: ill. Includes abstract and vita. Co-advisors: Peter D. Easton and Kirk L. Philipich, Dept. of Accounting and Management Information Systems. Includes bibliographical references (p. 127-135).

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16

Kline, Rodger Nickels. "Aggregation in temporal databases." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/288950.

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Temporal database systems extend relational database systems to support time-varying information. One important such extension is support for time-varying aggregate functions, such as a time-varying average. Our research will show that temporal aggregates may be specified in a semantically well defined manner yet be efficiently implemented as simple extensions to relational databases. We introduce a taxonomy of temporal aggregation, based on a study of all major temporal query languages containing aggregates. The taxonomy categorizes the expressiveness and functionality of temporal aggregation

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17

Helders, Fredrik. "Visualizing Carrier Aggregation Combinations." Thesis, Linköpings universitet, Kommunikationssystem, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-160132.

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As wireless communications is becoming an increasingly important part of ourevery day lives, the amount of transmitted data is constantly growing, creating ademand for ever-increasing data rates. One of the technologies used for boostingdata rates is carrier aggregation, which allows for wireless units to combine multipleconnections to the cellular network. However, there is a limited number ofpossible combinations defined, meaning that there is a need to search for the bestcombination in any given setup. This thesis introduces software capable of organizingthe defined combinations into tree s

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18

Jones, Ryan C. "Hopper Bands: Locust Aggregation." Scholarship @ Claremont, 2016. https://scholarship.claremont.edu/hmc_theses/81.

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Locust swarms cause famine and hunger in parts of Sub-Saharan Africa as they travel across croplands and eat vegetation. Current models start with biological properties of locusts and analyze the macroscopic behavior of the system. These models exhibit the desired migratory behavior, but do so with too many parameters. To account for this, a new model, the Alignment and Intermittent Motion (AIM) model, is derived with minimal assumptions. AIM is constructed with regards to locust biology, allowing it to elicit biologically correct locust behavior: the most noteworthy being the fingering of hop

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19

Lee, Yong Woo. "Data aggregation for capacity management." Thesis, [College Station, Tex. : Texas A&M University, 2003. http://hdl.handle.net/1969.1/90.

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Thesis (M.S.)--Texas A&M University, 2003.<br>"Major Subject: Industrial Engineering" Title from author supplied metadata (automated record created on Jul. 18, 2005.) Vita. Abstract. Includes bibliographical references.

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20

Valsomatzis, Emmanouil. "Aggregation techniques for energy flexibility." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/461884.

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Over the last few years, the cost of energy from renewable resources, such as sunlight and wind, has declined resulting in an increasing use of Renewable Energy Sources (RES). As a result, the energy produced by RES is fed into the power grid while their share is expected to significantly increase in the future. However, RES are characterized by power fluctuations and their integration into the power grid might lead to power quality issues, e.g., imbalances. At the same time, new energy hungry devices such as heat-pumps and Electric Vehicles (EVs) become more and more popular. As a result, t

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21

Bjørkøy, Olav Frihagen. "Adaptive Aggregation of Recommender Systems." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for datateknikk og informasjonsvitenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13915.

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In the field of artificial intelligence, recommender systems are methods for predicting the relevance items to a users. The items can be just about anything, for example documents, articles, movies, music, events or other users. Recommender systems examine data such as ratings, query logs, user behavior and social connections to predict what each user will think of each item.Modern recommender systems combine multiple standard recommenders in order to leverage disjoint patterns in available data. By combining different methods, complex predictions that rely on much evidence can be made. These

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22

Tahir, Hassaan. "Familial Aggregation of Severe Preeclampsia." Thesis, Linköpings universitet, Statistik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-73266.

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It has been proved from several studies that the genetic influence has been the most significant factor for having preeclampsia (PE). Still there are many uncertainties about origin and magnitude of the genetic effects as no specific inheritance patterns have been established. In this study, heritage risk of PE is in both the woman’s family and her partner’s family to her risk of PE is examined, along women and men own history with same and different partners. Moreover it is also examined whether timing of onset of PE is also has any impact on familial clustering of PE. Here, we used the popul

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23

Steventon, Anthony James. "Thermal aggregation of whey proteins." Thesis, University of Cambridge, 1993. https://www.repository.cam.ac.uk/handle/1810/251549.

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24

Pappas, Sylvie Rachelle. "The familial aggregation of agoraphobia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0017/MQ47079.pdf.

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25

Burgess-Wilson, Michael Edward. "Platelet aggregation in whole blood." Maastricht : Maastricht : Universitaire Pers Maastricht ; University Library, Maastricht University [Host], 1996. http://arno.unimaas.nl/show.cgi?fid=7393.

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26

Pierce, Flint G. "Aggregation in colloids and aerosols." Diss., Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/348.

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27

Ahrens, Malte. "Aggregation und Fusion von Milchfettkugeln." kostenfrei, 2008. http://mediatum2.ub.tum.de/doc/627363/627363.pdf.

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28

Mirnezami, Mitra. "Aggregation studies on sphalerite systems." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82935.

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The aggregation behaviour of sphalerite suspension and the role of zinc and magnesium ions are investigated. Aggregation is monitored by suspension analysis (turbidity) and optical microscopy and, in particular, a conductivity-settling technique. To probe the mechanisms, electrophoretic mobility (zeta potential) measurements and field emission scanning electron microscopy (FE-SEM) imaging are used.<br>In the case of sphalerite alone, for samples from a variety of sources, aggregation occurred at pH 8--10, well above the range in iso-electric point (pH 2--6). The aggregation is attribute

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29

Eboigbodin, Kevin Efosa. "Biophysical investigation of bacterial aggregation." Thesis, University of Sheffield, 2008. http://etheses.whiterose.ac.uk/3625/.

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In nature, bacteria usually exist as aggregates, in order to withstand changes in environmental conditions. Bacterial aggregation is of great significance in the field of biotechnology, environmental studies and medicine. Bacterial aggregation is thought to be governed by physical forces such Van der Waals and electrostatic interaction. However, extracellular polymeric substances (EPS), and the ability. of bacteria Ã‚Â·to participate in cell-to-cell communication via quorum sensing molecules have also been implicated in the bacterial aggregation. process. Despite the wealth of knowledge availa

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30

Amaro, Mariana Manuela Salgado da Costa. "Photophysical studies of amyloid aggregation." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=16849.

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Fluorescent techniques are amongst the methods used to study the self assembly of proteins into oligomers, however, most of the reports in literature use extrinsic fluorophores to obtain information on the peptide system. The goal of this thesis is to demonstrate how the intrinsic Tyrosine fluorescence of the β-amyloid peptide can be used to monitor its own aggregation with, therefore, minimal interference on the peptide's native structure, its biochemistry and its spontaneous process of aggregation. Firstly, it is shown that the fluorescence of amino acid Tyrosine, naturally present in wild t

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31

Kotsis, Nikolaos. "Multidimensional aggregation in OLAP systems." Thesis, University of Strathclyde, 2000. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21149.

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On-line analytical processing (OLAP) provides multidimensional data analysis to support decision making. OLAP queries require extensive computation based on aggregation along many dimensions and hierarchies. The time required to process these queries has traditionally prevented the interactive analysis of large databases and in order to accelerate query-response time, precomputed results are often stored as materialised views for later retrieval. This adds a prohibitive storage overhead when applied to the whole set of aggregates, known as the data cube. Storage space and computation time can

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32

Walker, Sophie Keziah. "The aggregation of dihydrodipicolinate synthase." Thesis, University of Canterbury. School of Biological Sciences, 2008. http://hdl.handle.net/10092/4427.

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An increasing number of diseases are associated with protein misfolding, one type of which results in the formation of amyloid fibrils. This research has addressed the hypothesis that all proteins can form amyloid fibrils and investigates what factors protect proteins from forming these macromolecular assemblies. Most analyses of the aggregation propensity of proteins have been limited to the properties of the amino acid sequence, thus fail to consider the roles that higher levels of organisation play in protecting polypeptides from misfolding. The (α/β)8 barrels are a common class of proteins

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33

Rostami, Tabar Bahman. "ARIMA demand forecasting by aggregation." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00980614.

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Demand forecasting performance is subject to the uncertainty underlying the time series an organisation is dealing with. There are many approaches that may be used to reduce demand uncertainty and consequently improve the forecasting (and inventory control) performance. An intuitively appealing such approach that is known to be effective is demand aggregation. One approach is to aggregate demand in lower-frequency 'time buckets'. Such an approach is often referred to, in the academic literature, as temporal aggregation. Another approach discussed in the literature is that associated with cross

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34

Weber, Guglielmo. "Consumption, liquidity constraints and aggregation." Thesis, London School of Economics and Political Science (University of London), 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262094.

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35

Thompson, Bernard Robert. "Theory of cluster-cluster aggregation." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238123.

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36

Bowen, Mark (Mark Stander). "The kinetics of colloidal aggregation." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/72245.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1985.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE.<br>Vita.<br>Includes bibliographical references.<br>by Mark Stander Bowen.<br>Ph.D.

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37

Gurry, Thomas. "Order, disorder, and protein aggregation." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/97347.

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Thesis: Ph. D., Massachusetts Institute of Technology, Computational and Systems Biology Program, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 114-124).<br>Protein aggregation underlies a number of human diseases. Most notably, it occurs widely in neurodegenerative diseases, including Alzheimer's and Parkinson's. At the molecular level, neurotoxicity is thought to originate from toxic gains of function in multimeric aggregates of proteins that are otherwise predominantly monomeric and disordered, fluctuating between a very large number of structu

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38

Knowles, Tuomas Pertti Jonathan. "Physical aspects in protein aggregation." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612258.

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39

White, Duncan Alexander. "Biophysical features of protein aggregation." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609696.

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40

Rozet, Allison M. "Shared Complex Event Trend Aggregation." Digital WPI, 2020. https://digitalcommons.wpi.edu/etd-theses/1379.

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Streaming analytics deploy Kleene pattern queries to detect and aggregate event trends against high-rate data streams. Despite increasing workloads, most state-of-the-art systems process each query independently, thus missing cost-saving sharing opportunities. Sharing complex event trend aggregation poses several technical challenges. First, the execution of nested and diverse Kleene patterns is difficult to share. Second, we must share aggregate computation without the exponential costs of constructing the event trends. Third, not all sharing opportunities are beneficial because sharing aggre

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41

Kallumadi, Surya Teja. "Data aggregation in sensor networks." Thesis, Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/2387.

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42

Fry, Dan. "Aggregation in dense particulate systems /." Search for this dissertation online, 2003. http://wwwlib.umi.com/cr/ksu/main.

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43

Chisholm, Thomas A. Jr. "A two-component aggregation model." W&M ScholarWorks, 1999. https://scholarworks.wm.edu/etd/1539616607.

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An aggregation model which allows specification of primary particle size, density, and fractal dimension for two different particle types was written. Three stickiness values are used, the stickiness of each particle type to itself and the stickiness between particle types. Aggregation mechanisms considered include differential settling and turbulent shear. The model is used in three forms. In its simplest form, it operates on a closed system with aggregates breaking up when their size approaches the Kolmogorov scale. If the system begins with two types of primary particles, larger aggregates

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44

APRILE, FRANCESCO ANTONIO. "Extrinsic factors affecting amyloid aggregation." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2012. http://hdl.handle.net/10281/27834.

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Protein conformational diseases (PCD) include a range of degenerative disorders in which specific peptides or proteins misfold and aberrantly self-assemble, eventually forming amyloid-like fibrils, which constitute the hallmark of many neurodegenerative diseases. Plenty of works demonstrated that amyloid aggregation is strongly influenced by several extrinsic factors, such as high concentrations of macromolecules or the presence of proteases and chaperons. Molecular chaperones have been recognised as key players in the avoidance of amyloid fibril formation and, in particular, recent evidence

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45

Thornton, Michael Alan. "Information and aggregation : The econometrics of dynamic models of consumption under cross-sectional and temporal aggregation." Thesis, University of Essex, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510508.

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46

Cristofaro, Silvia. "Simulating the aggregation of DNA oligonucleotides." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19187/.

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In this work we have studied, by means of Molecular Dynamics simulations, the process of denaturation and self-assembly of short oligonucleotides. Supramolecular ordering of DNA short strands is a promising field which is constantly enriched with new findings. Examples are provided by micellar and fibrils formations and due to the selectivity of DNA bindings, "intelligent" devices have been developed to perform simple logic operations. It is worth to notice that computer simulations of these DNA nanosystems would complement experiments with detailed insight into processes involved in self-ass

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47

Gantenberg, Marcus. "Aggregation kleiner Moleküle in kryogenen Matrizes." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969573081.

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Cheng, Kit-hung. "Top-k aggregation of ranked inputs." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B35506519.

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Kittner, Madeleine. "Folding and aggregation of amyloid peptides." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5357/.

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Aggregation of the Amyloid β (Aβ) peptide to amyloid fibrils is associated with the outbreak of Alzheimer’s disease. Early aggregation intermediates in form of soluble oligomers are of special interest as they are believed to be the major toxic components in the process. These oligomers are of disordered and transient nature. Therefore, their detailed molecular structure is difficult to access experimentally and often remains unknown. In the present work extensive, fully atomistic replica exchange molecular dynamics simulations were performed to study the preaggregated, monomer states and earl

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Cully, Brendan. "Extending systems with virtual hardware aggregation." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60579.

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Hardware has physical limitations. It has fixed performance limits, and may fail. Applications suffer from the limitations of the physical hardware on which they run. Making applications able to take advantage of multiple hardware instances to avoid these limitations is complex. Since this effort must be expended for every application, it is impractical for most of them. In this thesis, we show that we can aggregate multiple physical machines at the virtual machine interface, allowing them to transcend the limitations of single machines without changing the applications themselves.<br>Science,

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