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Dissertations / Theses on the topic 'Subtree'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Atkins, Ross. "Subtree transfer operations on phylogenetic networks." Thesis, University of Oxford, 2016. http://ora.ox.ac.uk/objects/uuid:61dcd8e3-8e1d-4678-b22f-b6d77341aacf.

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Leaf-labelled, rooted binary trees can be used to represent a wide range of data. One way to measure the discrepancy between a pair of such trees, is to measure how many subtree transfer operations are required to transform one into the other. Four standard subtree transfer oper- ations for binary trees, used in particular for leaf-labelled binary trees, are: tree bisection and reconnection (TBR), subtree prune and regraft (rSPR), rooted subtree prune and regraft (rSPR) and nearest neighbour interchange (NNI). Each of these operations induces a metric over the class, B(n), of binary trees with

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2

Welke, Pascal [Verfasser]. "Efficient Frequent Subtree Mining Beyond Forests / Pascal Welke." Bonn : Universitäts- und Landesbibliothek Bonn, 2019. http://d-nb.info/1188732161/34.

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3

Cenek, Eowyn W. "Subtree overlap graphs and the maximum independent set problem." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ28923.pdf.

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4

Allen, Benjamin L. "Subtree transfer operations and their induced metrics on evolutionary trees." Thesis, University of Canterbury. Mathematics, 1998. http://hdl.handle.net/10092/8409.

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Leaf-labelled trees are widely used to describe evolutionary relationships, particularly in biology. In this setting, extant species label the leaves of the tree, while the internal vertices correspond to ancestral species. Various techniques exist for reconstructing these evolutionary trees from data, and an important problem is to determine how "far apart" two such reconstructed trees are from each other, or indeed from the true historical tree. To investigate this question requires tree metrics, and these can be induced by operations that rearrange trees locally. Here we investigate three s

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5

Shen, Mo. "Exploiting Vocabulary, Morphological, and Subtree Knowledge to Improve Chinese Syntactic Analysis." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215675.

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In reference to IEEE copyrighted material which is used with permission in this thesis, the IEEE does not endorse any of Kyoto University's products or services. Internal or personal use of this material is permitted. If interested in reprinting/republishing IEEE copyrighted material for advertising or promotional purposes or for creating new collective works for resale or redistribution, please go to http://www.ieee.org/publications_standards/publications/rights/rights_link.html to learn how to obtain a License from RightsLink.<br>Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(情報学)<br>甲第198

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6

Hesselius, Tobias, and Tommy Savela. "A Java Framework for Broadcast Encryption Algorithms." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2504.

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<p>Broadcast encryption is a fairly new area in cryptology. It was first addressed in 1992, and the research in this area has been large ever since. In short, broadcast encryption is used for efficient and secure broadcasting to an authorized group of users. This group can change dynamically, and in some cases only one-way communication between the sender and receivers is available. An example of this is digital TV transmissions via satellite, in which only the paying customers can decrypt and view the broadcast. </p><p>The purpose of this thesis is to develop a general Java framework for impl

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7

Collins, Joshua Stewart. "Rekernelisation Algorithms in Hybrid Phylogenies." Thesis, University of Canterbury. Mathematics and Statistics, 2009. http://hdl.handle.net/10092/2852.

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It has become well known that an evolutionary tree is inadequate to represent fully the history of life. Two possible ways of dealing with this are the rooted subtree prune and regraft distance between a pair of trees, which measures how different they are, and the slightly more biologically sound hybridisation number of a set of trees that attempts to determine the minimum number of hybrid events that must have occurred for a given set of evolutionary trees. When characterised via agreement forests both problems are, although NP hard, fixed parameter tractable---meaning the problem can be con

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8

Snook, Michael James. "Evolution of Tandemly Repeated Sequences." Thesis, University of Canterbury. Mathematics & Statistics, 2009. http://hdl.handle.net/10092/2661.

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Despite being found in all presently sequenced genomes, the evolution of tandemly repeated sequences has only just begun to be understood. We can represent the duplication history of tandemly repeated sequences with duplication trees. Most phylogenetic techniques need to be modified to be used on duplication trees. Due to gene loss, it is not always possible to reconstruct the duplication history of a tandemly repeated sequence. This thesis addresses this problem by providing a polynomial-time locally optimal algorithm to reconstruct the duplication history of a tandemly repeated sequence in

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9

Kutty, Sangeetha. "Enriching XML documents clustering by using concise structure and content." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/48326/1/Sangeetha_Kutty_Thesis.pdf.

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With the growing number of XML documents on theWeb it becomes essential to effectively organise these XML documents in order to retrieve useful information from them. A possible solution is to apply clustering on the XML documents to discover knowledge that promotes effective data management, information retrieval and query processing. However, many issues arise in discovering knowledge from these types of semi-structured documents due to their heterogeneity and structural irregularity. Most of the existing research on clustering techniques focuses only on one feature of the XML documents, thi

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10

Chowdhury, Israt Jahan. "Knowledge discovery from tree databases using balanced optimal search." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/92263/1/Israt%20Jahan_Chowdhury_Thesis.pdf.

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This research is a step forward in discovering knowledge from databases of complex structure like tree or graph. Several data mining algorithms are developed based on a novel representation called Balanced Optimal Search for extracting implicit, unknown and potentially useful information like patterns, similarities and various relationships from tree data, which are also proved to be advantageous in analysing big data. This thesis focuses on analysing unordered tree data, which is robust to data inconsistency, irregularity and swift information changes, hence, in the era of big data it becomes

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11

Böcker, Sebastian. "From subtrees to supertrees." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=969280246.

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12

Aghezzaf, El Houssaine, Thomas L. Magnanti, and Laurence A. Wolsey. "Optimizing Constrained Subtrees of Trees." Massachusetts Institute of Technology, Operations Research Center, 1992. http://hdl.handle.net/1721.1/5407.

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Given a tree G = (V, E) and a weight function defined on subsets of its nodes, we consider two associated problems. The first, called the "rooted subtree problem", is to find a maximum weight subtree, with a specified root, from a given set of subtrees. The second problem, called "the subtree packing problem", is to find a maximum weight packing of node disjoint subtrees chosen from a given set of subtrees, where the value of each subtree may depend on its root. We show that the complexity status of both problems is related, and that the subtree packing problem is polynomial if and only if eac

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13

Kadish, David C. "Subtle Emergences." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54874.

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We often understand the world around us by studying its parts. This approach, known as reductionism, has long dominated rational inquiry. The limitations of using this approach in isolation have started to become apparent as people have started to realize that complex systems, such as ecosystems, do not behave as a linear combination of parts. In many cases, the emergent behaviours of complex systems cannot be deduced empirically. I explore the role of experience and embodied inquiry as an alternative approach to studying complex systems. Through the proposal, production, installation, and e

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14

Klempan, Rosalinde. "Premenstrual affective subtype differentiation." Thesis, University of Ottawa (Canada), 1987. http://hdl.handle.net/10393/5381.

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15

Lindh, Morén Jonas. "The Application of Closed Frequent Subtrees to Authorship Attribution." Thesis, Umeå universitet, Institutionen för datavetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-86458.

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In this experimental study we compare the authorship attribution performance of two different types of distinguishing features; overlapping syntax subtrees of height one (or small trees) and closed frequent syntax subtrees. Authors and documents used in the experiments are randomly drawn from a large corpus of blog posts and news articles. Results show that small trees outperform closed frequent trees on this data set, both in terms of classifier performance and computational eciency.

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16

Taia, W. K. "Systematic studies of subtribe Amaranthinae." Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383385.

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17

Meyer, Bahiah. "The role of HIV-1 subtype B Envelope transmission motifs in subtype C variant infectivity." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29420.

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Transmitted founders (TF) might carry motifs that provide a phenotypic advantage that enables human immunodeficiency virus type-1 (HIV-1) to overcome immune barriers within the female genital tract. One study compared over 5000 subtype B TF and mismatched chronic infection envelope (env) sequences and identified two putative transmission motifs: Histidine at position 12 of the signal peptide (His12) and a potential N-glycan site (PNG) at position 413-415. Although, His12 was shown to be important for subtype B Env expression and viral infectivity, in our own sequence analysis subtype C variant

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18

Boudko, Ekaterina. "Phylogenetic Analysis of Subtribe Alopecurinae (Poaceae)." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30696.

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Subtribe Alopecurinae (Poeae, Poaceae) sensu lato‘s seven genera share interesting morphological similarities (dense spicate panicles and one-flowered spikelets) that were widely thought to have a common origin. However, recent molecular evidence for three of the genera has suggested that the subtribe may be polyphyletic. To test this, five DNA regions were sequenced and analyzed using phylogenetic methods. Results confirm that Alopecurinae s.l. as presently treated is polyphyletic and should be dissolved. Additionally, the genus Cornucopiae may be just another Alopecurus. Limnas and Pseudophl

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19

Weiß, Christoph. "Subtle and Ineffable Tree Properties." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-114389.

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20

Milne, S. A. "Further characterisation of the EP4-receptor subtype." Thesis, University of Edinburgh, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.657821.

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The Rabbit Jugular vein (RJV) and Pig Saphenous vein (PSV) were used to further characterise the EP<SUB>4</SUB>-receptor. Organ bath studies with an array of EP-agonists and antagonists produced data which confirmed the PSV as an EP<SUB>4</SUB>-receptor containing preparation and that the RJV, after comparing agonist potency profiles, also contained the EP<SUB>4</SUB>-receptor subtype. The agonist potency profile obtained was PGF<SUB>2</SUB> ≥ 11-deoxy PGE<SUB>1</SUB> = 16, 16-dimethyl PGE<SUB>2</SUB> > butaprost >> AH13205. The Chinese Hamster Ovary (CHO) cell line was used as an alternative

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21

Toscano, de Brito Antonio Luiz Viera. "Systematic studies in the subtribe Ornithocephalinae (Orchidaceae)." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386911.

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22

Curling, Louise. "Psychotherapeutic intervention for morbid jealousy (obsessive subtype)." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/4734/.

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23

Rubino, Alfonso. "Parkinson Disease subtype: morphostructural and neurobiological correlates." Doctoral thesis, Università di Catania, 2017. http://hdl.handle.net/10761/4032.

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The current view of malady reconsider PD as a complex clinicopathological entity, where the proteiform multiorgan involvement results from convergent multifactorial biomolecular substrates. It follows that, from a clinical point of view, PD presents as an extremely heterogeneous disorder with a wide range of symptoms and scarcely predictable progression trajectories. Therefore, it become necessary subtyping PD in order to better define the pathogenic process, the clinical progression and the response to treatment. However, the precise mechanistic insights are hindered by the lack of understa

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24

Stevens, Miata Yvette. "Corticotropin-releasing hormone receptor subtype 1 and subtype 2 mRNA expression and protein localization in the myometrium in pregnancy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0005/MQ34091.pdf.

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25

Augustin, Dyona. "PTSD Subtypes, Depressive Presentation, Dissociation, and Cognitive Appraisals and Their Impact on Cardiovascular Reactivity Responses to Stress." Diss., NSUWorks, 2017. https://nsuworks.nova.edu/cps_stuetd/109.

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Both posttraumatic stress disorder (PTSD) and major depressive disorder (MDD) are related to an increased risk for cardiovascular disease (CVD), with links to ischemic heart disease, myocardial infarction, cardiac mortality, and other cardiac conditions. Given that these disorders are associated with increased medical costs, disability, and employer burden, research has investigated which factors increase the likelihood that one will develop CVD. While one hypothesis suggests that individuals who exhibit exaggerated responses to stress are at greater risk of developing CVD, individuals with PT

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26

Li, X. (Xiaobai). "Reading subtle information from human faces." Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526216386.

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Abstract The face plays an important role in our social interactions as it conveys rich sources of information. We can read a lot from one face image, but there is also information we cannot perceive without special devices. The thesis concerns using computer vision methodologies to analyse two kinds of subtle facial information that can hardly be perceived by naked eyes: the micro-expression (ME), and the heart rate (HR). MEs are rapid, involuntary facial expressions which reveal emotions people do not intend to show. It is difficult for people to perceive MEs as they are too fast and subtle,

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27

O'Hare, A. E. "Subtle neurological morbidity in childhood leukaemia." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376222.

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28

Eller, Leigh Anne. "Acute HIV infection in non-subtype B populations." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-185496.

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29

Salazar-Chavez, Gerado Adolfo. "Phylogeny and classification of subtribe spiranthinae (orchidaceae, orchidoideae )." Thesis, Birkbeck (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405652.

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30

Caioni, Massimo. "Epstein-Barr virus subtype distribution in angioimmunoblastic lymphadenopathy /." [S.l : s.n.], 1994. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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31

Lee, Guinevere Kwun Wing Queenie. "Standard and enhanced genotypic assessment of HIV drug resistance and tropism in subtype-B and non-subtype-B HIV-1 infections." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/51771.

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Sequencing human immunodeficiency virus type 1 (HIV-1) for drug resistance mutations and viral tropism is crucial to the current HIV/AIDS personalized treatment approach. This thesis addresses particular areas where clinical utility data is lacking: First, current methods were validated as clinically useful with plasma viral RNA primarily from patients infected with subtype B HIV-1, the dominant strain in developed countries; however, globally most patients are infected with non-subtype B variants. Secondly, there is insufficient data available with respect to the newest classes of antiretr

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32

Sacco, Helene Gomes. "A (Ré)fábrica : um lugar inventado, entre a objetualidade das coisas e a sutil materialidade do desenho e da palavra." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/116093.

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La recherche part de l’investigation poétique sur le processus de création d’un Lieu Inventé qui se produit entre l’objectualité des choses et la subtile matérialité du dessin et de la parole. On revisite des notions et concepts de matérialité associés aux processus de création et de fabrication d’objets, en comprenant que le champ de l’art est aussi responsable d’une partie de la pensée sur la matérialité du monde, parce que nous agissons aussi comme des producteurs de formes dans des processus de création d’objets de pensé, qui constituent eux aussi des inventions et des propositions de mode

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33

BREA, JOANA DE OLIVEIRA. "SUBTLE RESISTANCIES: FILM CREATION AND PRODUCTION INSTANCIES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=12940@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Se a tensão entre o fazer artístico e a lógica do mercado assombrou a arte em geral, desde o surgimento da cultura de massa no século XIX, ela esteve presente no cinema já no seu nascimento: para além de sua dimensão de obra de arte, a invenção do espetáculo da projeção fez do filme um bem de consumo coletivo, impondo-lhe métodos de produção industriais e finalidades comerciais. Na contemporaneidade, o declínio das grandes utopias e a expansão do papel do mercado como grande mediador cultural tem, cada vez mais, colocado em xeque o paradigm

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34

Knüsel, Christopher J. "The Physical Evidence of Warfare - Subtle Stigmata?" Archeopress, 2005. http://hdl.handle.net/10454/2706.

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35

Mketsu, Moses Clive Masisange. "Screening for subtate tolerant Geobacillus pallidus RAPc8 nitrile hydratase." Thesis, University of the Western Cape, 2009. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_1166_1307514664.

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<p>In this study G. pallidus RAPc8 NHase mutants were screened for reduced substrate inhibition compared to the wild type enzyme. Wild type and mutant enzymes were expressed and purified using hydrophobic interaction chromatography. Amidase coupled enzyme stop assays were conducted using 3-cyanopyridine as a substrate, whereas continuous enzyme kinetics were conducted using acrylonitrile as a substrate.</p>

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36

Lundström, Linda. "Subtype selective activation and molecular characterization of galanin receptors." Doctoral thesis, Stockholms universitet, Institutionen för neurokemi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1344.

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Showing an extensive distribution in the nervous system, and often in co-localization with the classical neurotransmitters, neuropeptides are functioning as important modulators of neuronal signaling. Subsequently, compelling evidence has implicated a modulatory role for the neuropeptide galanin in several physiological functions. The effect of galanin is trancduced intracellularly by three different receptors, and defining the explicit effect from these receptor subtypes is of outmost interest, and likely to result in future therapeutic utilization of the galanin system. The main aim of this

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37

Lundström, Linda. "Subtype selective activation and molecular characterization of galanin receptors /." Stockholm : Department of Neurochemistry, Stockholm University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1344.

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38

Walker, Polly Rose. "Evolution and infectivity of HIV-1 subtype C viruses." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442985.

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39

Hutchins, DeLesley. "Pure subtype systems : a type theory for extensible software." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/3937.

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This thesis presents a novel approach to type theory called “pure subtype systems”, and a core calculus called DEEP which is based on that approach. DEEP is capable of modeling a number of interesting language techniques that have been proposed in the literature, including mixin modules, virtual classes, feature-oriented programming, and partial evaluation. The design of DEEP was motivated by two well-known problems: “the expression problem”, and “the tag elimination problem.” The expression problem is concerned with the design of an interpreter that is extensible, and requires an advanced mod

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40

Laws, Siobhan Alison Mary. "Somatostatin receptor subtype mRNA expression in human colorectal cancer." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364711.

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41

Rasigade, Gilles. "Modulateur optique haute-fréquence sur subtrat silicium-sur-isolant." Paris 11, 2010. http://www.theses.fr/2010PA112158.

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La photonique silicium apparait aujourd’hui comme le domaine de recherche clef pour les télécommunications optiques avec comme objectif le développement de transmetteurs intégrés compatibles avec la technologie silicium CMOS. Dans ce contexte, mes travaux de thèse ont porté plus spécifiquement sur la structure du modulateur optique sur substrat SOI pour les applications 10 et 40 Gbit/s. La structure active retenue repose sur le mécanisme de déplétion de porteurs au sein d’une jonction polarisée en inverse et permet grâce à un interféromètre Mach-Zehnder de moduler l’intensité du signal optique

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42

Sokutu, Tamsanqa Mthunzi. "Taxonomy of subtribe aveninae excluding Helictotrichon Schult (Part 1)." Thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/23532.

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43

Clevinger, Jennifer Ann. "Systematics of Silphium and its subtribe Engelmanniinae (Asteraceae : Heliantheae) /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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44

BAVO, FRANCESCO. "SUBTYPE-SELECTIVE NEURONAL NICOTINIC ACETYLCHOLINE RECEPTOR AGONISTS AND ANTAGONISTS." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/607332.

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This PhD thesis focuses on two specific targets, belonging to the same receptor class of Nicotinic Acetylcholine Receptors (nAChRs): the α4β2 subtype and the α7 subtype. This elaborate is divided in two parts. The aim of the first part is the design and synthesis of α4β2 selective partial agonists as potential smoking-cessation agents. The aim of the second part is the design and synthesis of α7 antagonists with mitocan properties as antitumoral agents. Part 1. In the first project, a series of 3-nitrophenyl ethers and 3-hydroxyphenyl ethers of (S)-N-methylprolinol bearing bulky and lipoph

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45

Woodworth, Mollie Ann. "Transcriptional Controls over Neocortical Projection Neuron Identity and Connectivity." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10670.

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The complex and sophisticated circuitry of the neocortex is assembled from an extraordinarily diverse repertoire of neuronal subtypes that reside in distinct functional areas. In recent years, a number of key regulators over neocortical projection neuron subtype and area specification have been identified. It is becoming increasingly clear that these regulators function within a highly-interconnected network, acting in parallel, synergistically, and cross-repressively to orchestrate cortical development. Moreover, an emerging understanding of cortical development has revealed that subtype and

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46

Johnston, Jennene Louise Hooper. "Angels of desire subtle subjects, aesthetics and ethics /." View thesis, 2004. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20050527.155421/index.html.

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47

Costanza, Enrico. "Subtle, intimate interfaces for mobile human computer interaction." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37387.

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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2006.<br>Includes bibliographical references (p. 113-122).<br>The mobile phone is always carried with the user and is always active: it is a very personal device. It fosters and satisfies a need to be constantly connected to one's significant other, friends or business partners. At the same time, mobile devices are often used in public, where one is surrounded by others not involved in the interaction. This private interaction in public is often a cause of unnecessary

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48

Clark, Samantha Jane. "The subtle ether : writing into the 'space between'." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/16028.

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The ether was proposed by Enlightenment natural philosophers as an undetectable substance filling the space between the stars, that held them in place and supported the propagation of their light across space. In The Subtle Ether: A Memoir of the Space Between, insights from the history of the ether are threaded through my experience of clearing the family home after the death of my parents, and inform a reflection on ‘spaces between' memories, family members, and between ourselves and the world. This thesis both proposes and practises writing creative nonfiction as a method of first person en

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49

Pircher, Joachim. "The TNF-receptor subtype 2 mediates prothrombotic effects in vivo." Diss., lmu, 2011. http://nbn-resolving.de/urn:nbn:de:bvb:19-135653.

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50

Abebe, Almaz. "HIV-1 subtype C in Ethiopia genotypic and phenotypic variation /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2000. http://dare.uva.nl/document/82577.

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