To see the other types of publications on this topic, follow the link: Boundaries.
Dissertations / Theses on the topic 'Boundaries'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Boundaries.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Gorham, Elizabeth Trabue. "Boundaries." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1395.
Full textAbstract:
The photographer discusses the work in Boundaries, her Master of Fine Arts exhibition on display at Slocumb Galleries, East Tennessee State University, Johnson City, Tennessee from October 31 to November 4, 2011. The exhibition consists of 20 black and white photographs, the main subject of which is the photographer's son. The photographs and supporting thesis explore the idea of boundaries real and implied, and how confinement can prompt a variety of behaviors. Topics include the process and evolution of the work and the artists who have influenced it, the importance of light and the challenge of photographing family. Included is a catalogue of the exhibition.
2
Radley, Diane. "Redefining boundaries." Diss., Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-12072005-141431.
Full text
3
Covarrubias, Daniela. "Soft boundaries." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/87137.
Full textAbstract:
Thesis: M. Arch., Massachusetts Institute of Technology, Department of Architecture, 2014.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Page 169 blank. Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 166-168).
Textiles have always played a critical role in the spaces we inhabit. Although textiles are often in opposition to what we consider to be architecture. Architecture is permanent, grounded, fixed; textiles are temporary, flexible, and portable. It is precisely those qualities of variation that allow us to directly modulate our surroundings, which is something we have long relied on textiles to do--not only as clothing, but also very much so in architectural contexts. Even the most iconic of modern architecture with its great expanses of glass and even greater claims of eliminating boundaries is nearly always accompanied by a curtain. In the realm of architectural textiles, curtains in particular go beyond the decorative. They are an essential element to the functionality of the architecture. Curtains have the ability to mediate light, sound, temperature, create spatial boundaries, and allow for direct and tactile interactivity. In taking on the curtain as an architectural element equal to any other, my goal is to employ the functionality and flexibility of textiles along with the language of curtains and expand it to design boundaries that can mediate between programs, but with their embedded variability, emphasize choice in the control of our environment.
by Daniela Covarrubias.
M. Arch.
4
Lemons, Rye Daniel. "Implied Boundaries." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33066.
Full textAbstract:
Implied spatial boundaries are examined and evaluated at a camping shelter complex on an Eastern California lake. A grid of concrete columns house a series of suspended wooden boxes and a connecting ramp.Master of Architecture
5
Dempsey, Lydia. "Through boundaries." Thesis, University of Iowa, 2019. https://ir.uiowa.edu/etd/6723.
Full textAbstract:
Through Boundaries is a string quartet that attempts to recalibrate the way one listens by focusing on two spectrums, time and pitch. I explore what falls between the boundaries, in reference to the space between sound and silence and to frequencies between the conventional twelve pitches. The two movements are differing interpretations of the same graphical sketch material, viewing it from different perspectives.
I. In-Between is structured with short gestures that are juxtaposed with longer periods of time that lack notated sound. Each gesture represents an unnamed event. For example, one gesture may represent the toss of a ball and the next gesture may represent it bouncing against the concrete. Each of these is a discrete point. At first, the space between these points appears empty, but on deeper investigation, it is overflowing with movement and energy. Visually, the ball floats up and falls to the ground. The electronics represent this energy, slowly fading into perception and forming waves of sound that weave in and out, nearly overpowering the quartet.
II. Glide explores the interaction of pitches on a micro-level, including quartertones and glissandi that occupy a small pitch range. The movement begins with a still, seemingly static nature. Deviations appear, and harmonies seemingly blur and crystallize. When a larger melodic interval finally arrives, it is overwhelming.
6
Veach, Grace L. "Tracing Boundaries, Effacing Boundaries: Information Literacy as an Academic Discipline." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4413.
Full textAbstract:
Both librarianship and composition have been shaken by recent developments in higher education. In libraries ebooks and online databases threaten the traditional "library as warehouse model," while in composition, studies like The Citation Project show that students are not learning how to incorporate sources into their own writing effectively. This dissertation examines the disciplinary origins and current status of information literacy and makes a case for increased collaboration between Writing Studies and librarians and the eventual emergence of information literacy as a discipline in its own right. Chapter One introduces the near-total failure of information literacy pedagogy and the lack of communication between the two disciplines. Chapter Two traces the disciplinary evolution of information literacy from a new concept in the 1970s to its current status. Chapter Three examines the current state of affairs in information literacy by analyzing library and writing program websites to see if and how each addresses information literacy. Chapter Four provides the results of surveys of librarians and writing instructors wherein they describe information literacy teaching and assessment at their own institutions and lay out their visions for the future of information literacy. Chapter Five studies a librarian and a writing instructor who put some of these ideas into action over the course of the 2011-2012 school year. Chapter Six surveys the relationship of accrediting bodies to information literacy and provides recommendations for the future of information literacy instruction that will cross disciplinary lines and allow for both librarians and compositionists to play to their strengths as they establish the new discipline of information literacy.
7
Scott, Barry Allan. "Transitions and boundaries." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3617.
Full textAbstract:
Thesis (M.F.A.) -- University of Maryland, College Park, 2006.Thesis research directed by: Dept. of Art. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
8
Ling, Manny. "Calligraphy across boundaries." Thesis, University of Sunderland, 2008. http://sure.sunderland.ac.uk/2929/.
Full textAbstract:
The research uses Burgert (1998) and Brody Neuenschwander’s (2000) ideas of the ‘Linear Graphic’ to explore the creative and expressive qualities of the line. In addition, the characteristics of Ch’i are also analysed and identified. This is achieved by exploring and interpreting classic Chinese principles such as ‘Ch’i Yuen Shen Tung’ (Rhythmic Vitality), ‘Harmony of the Mind and Hand’ and ‘Stilling the Heart’. As a result, new approaches of ‘Simplicity’ and ‘Spontaneity’ have been developed for Western calligraphy. These approaches demonstrate the requirement of the control and integrity of the calligrapher. The research also places emphasis on the development of one’s ‘self-being’ to cultivate the internal and external aspects of calligraphy. This is achieved through the creation of calligraphy pieces as part of this developmental process. Digital media are also explored by using these same principles and approaches. New characteristics and processes such as ‘Layering’, ‘Reusability’ and ‘Simplicity and Complexity’ in print based calligraphy, as well as ‘Dynamism’, ‘Customisability’, ‘Impermanence’ and ‘Interactivity’, in computational calligraphy have emerged as a result.
9
Graham, Keith A. "Boundaries and Barriers." Kent State University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=kent1417024422.
Full text
10
Baker, Jacob Edward. "Index to Boundaries." Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1587578756695936.
Full text
11
Glover, Mickey. "Designing without boundaries." [Johnson City, Tenn. : East Tennessee State University], 2003. http://etd-submit.etsu.edu/etd/theses/available/etd-1112103-133946/unrestricted/GloverM120803f.pdf.
Full textAbstract:
Thesis (M.F.A.)--East Tennessee State University, 2003.Title from electronic submission form. ETSU ETD database URN: etd-1112103-133946. Includes bibliographical references. Also available via Internet at the UMI web site.
12
Persson, Alma. "Changing boundaries, defending boundaries : Gender relations in the Swedish Armed Forces." Doctoral thesis, Linköpings universitet, Tema teknik och social förändring, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71257.
Full textAbstract:
This thesis aims to show how gender is done in the Swedish Armed Forces, against the backdrop of its transition into an international defence organization and the international resolutions that call for gender mainstreaming in peacekeeping operations. In the so-called “New Armed Forces”, traditional demarcations that have separated civilian employees from members of the military officer profession are no longer self-evident. At the same time, what it means to be men and women in the military is changing. Three empirical studies form the basis of the thesis. The first consists of qualitative interviews with women pioneers in the military officer profession, and discusses how gender relations in the Swedish military have changed since the inclusion of women. The second addresses the intersecting relations of gender and occupation and is based on interviews with strategic and executive actors in the Armed Forces Headquarters. The third, ethnographic, study follows a military unit preparing for a peacekeeping mission. It focuses on gender relations in everyday work and shows how the ongoing transformation changes what it means to be military men and women. The thesis is informed by feminist studies of organization, critical studies of men and masculinities, research on professions and occupations, and military studies. A “doing gender” approach and a relational view of both gender and occupations guide the analysis. The analysis shows how established ways of doing gender are changed and reproduced in military practices, how the emphasis on peacekeeping reshapes gender relations in military work, and how organizational boundaries are maintained and deconstructed in organizational practices. Theoretically, the thesis contributes by developing tools for analysing the practising of gender in organizations. The concept of boundary work is elaborated into a tool for analysing how demarcations of gender and occupation are accomplished in work practices. The concept Repair work is employed to capture the complexities of doing masculinities in organizations, by looking closely at situations where the everyday practising of gender is disturbed.Denna avhandling syftar till att visa hur genus görs i den svenska Försvarsmakten, mot bakgrund av organisationens förändring från invasionsförsvar till insatsförsvar. Denna process kopplas till kraven på jämställdhetsintegrering inom fredsbevarande arbete. I den så kallade ”nya Försvarsmakten” är de gränser som tidigare skilt civilanställda från yrkesofficerare inte längre självklara. Samtidigt förändras de innebörder som kön ges i organisationen. Avhandlingen bygger på tre empiriska studier. Den första består av kvalitativa intervjuer med några av de första kvinnliga yrkesofficerarna i Sverige och diskuterar hur genusrelationerna har förändras sedan kvinnor gavs tillträde till officersyrket. Den andra, som inriktar sig på hur genus- och yrkesrelationer samverkar, bygger på intervjuer med aktörer på ledande och strategiska positioner i Försvarsmaktens högkvarter. Den tredje studien är etnografisk och följer ett internationellt insatsförband under förberedelserna för en fredsbevarande insats. Den undersöker hur genusrelationer skapas i det dagliga arbetet och visar hur den pågående förändringen omformar de betydelser som kvinnor och män tillskrivs i militären. Den tidigare forskning som avhandlingen knyter an till är genus- och organisationsforskning, kritiska studier av män och maskulinitet, forskning om yrken och professioner samt samhällsvetenskapliga militärstudier. Genomgående används ett ”doing gender”-perspektiv samt ett relationellt förhållningsätt till genus såväl som yrke. Analysen visar hur etablerade sätt att göra kön förändras och reproduceras i militära praktiker, hur betoningen på fredsbevarande arbete omformar genusrelationer samt hur gränser upprätthålls och dekonstrueras i organisatoriska praktiker. Avhandlingen bidrar med nya teoretiska verktyg för att förstå genuspraktiker i organisationer. Begreppet gränsarbete vidareutvecklas till ett begrepp som visar hur genus- och yrkesgränser görs i det dagliga arbetet. Begreppet reparationsarbete tydliggör de komplexa praktiker genom vilka maskulinitet görs då det vardagliga genusskapandet sätts ur spel.
13
Hoehn, Brian T. "Crossing thresholds blending boundaries /." PDF viewer required Home page for entire collection, 2009. http://archives.udmercy.edu:8080/dspace/handle/10429/9.
Full text
14
Hambli, Noureddine. "Spacetime boundaries as orbifolds." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59395.
Full textAbstract:
The current excitement surrounding string theory prompted us to tackle the problem of black hole radiation. Claims have been made concerning a possible 'stringy mechanism' that would avoid the singularity problem by giving a divergent energy-dissipation rate. As a check on such arguments, the Casimir energy of the string between two infinite parallel mirrors is computed using the closed, oriented bosonic string. Such a calculation is also a prerequisite to the understanding of the more interesting situation of string behaviour in the presence of accelerating boundaries. The formalism used here is the first-quantized Polyakov approach, which most simply translates to an orbifold problem.
15
Richins, Matthew Thomas. "Intergroup empathy : beyond boundaries." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/31148.
Full textAbstract:
Individuals feel more empathy for those in their group (i.e., ingroup members) and less for those who are not (i.e., outgroup members). But evidence suggests that empathy is not merely selective to the other’s group, rather it fluctuates according to how the other’s group is perceived by the individual. This project was developed to investigate whether individuals truly differentiate between outgroups when it comes to empathy. Across several studies, I presented participants with images depicting others receiving physically painful stimulations. The other person in each case was a member of the ingroup or one of two outgroups, one of which was more of a competitive threat to the ingroup. In Study 3, I found that participants exhibited an ingroup bias, that is, greater levels of empathy to images of ingroup pain, compared to outgroup pain. In Study 4, I found that empathic responses also varied between the two outgroups: Empathy was significantly lower when targets were from the outgroup that was perceived as more of a competitive threat to the ingroup, than the other outgroup. This provided the first evidence that beliefs about outgroups, and not merely the ingroup-outgroup distinction, modulates empathic processing. I also investigated the extent to which threats that are incidental to the ingroup context affect empathy. Across two studies I showed reliable evidence that priming incidental feelings of fear was sufficient to elicit intergroup bias in self-reported empathy, specifically against the outgroup, i.e., reduced empathy for outgroup targets, rather than increased empathy for ingroup targets. Finally, I investigated the extent to which my findings could be accounted for by individual differences. In a series of ‘mini meta-analyses’, I provide evidence that in an intergroup context a shared group membership confers an empathic advantage when responding to a target’s pain, regardless of one’s sex or their scores on a measure of trait empathy.
16
Weese, Eric Gordon. "Essays on political boundaries." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/49712.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Economics, 2009.Includes bibliographical references.
In the first chapter of this thesis, I study Japanese municipal mergers using a political coalition formation model. Political coalition formation games can describe the formation and dissolution of nations, as well as the creation of coalition governments, the establishment of political parties, and other similar phenomena. These games have been studied from a theoretical perspective, but the models have not been used extensively in empirical work. This paper presents a method of estimating political coalition formation models with many-player coalitions, and then applies this method to the recent heisei municipal amalgamations in Japan to estimate structural coefficients that describe the behaviour of municipalities. The method enables counterfactual analysis, which in the Japanese case shows that the national government could increase welfare via a counter-intuitive policy involving transfers to richer municipalities conditional on their participation in a merger. In the second chapter, I examine selection effects in the cross-country state system. The countries present today are only part of a larger set of potential countries. Since many modern states originated as colonies, colonial data can be used to examine correlates of independence. During decolonization, larger and more economically successful colonies were more likely to become independent. This selection effect may explain why, despite commonly held opinions about efficiencies of scale, small countries appear to have higher GDP both in terms of growth and levels. The estimated selection model implies that analysing only currently independent countries can introduce substantial selection bias.
(cont.) An example of this is presented with the Frankel and Romer trade-instrument regression, where the selection effect biases the coefficient on the instrument upwards, and a regression on an unselected sample yields a negative and statistically insignificant coefficient. In the third chapter, I examine the endogeneity of linguistic fragmentation, assuming that national borders have already been fixed. Users of ethnic fragmentation indices generally assume that fragmentation is constant and exogenous. In many countries, however, linguistic fragmentation has decreased a great deal over the past two centuries, and frequently-used measures of ethnic fragmentation rely heavily on linguistic differences to distinguish ethnic groups. Previous qualitative research suggests that linguistic homogenization is correlated with administrative centralization. This hypothesis is tested empirically using the population of the largest city in each country in 1900 as a proxy for centralization, along with the population of the country as a whole and its surface area. Using these proxies produces a statistically significant relationship between centralization and linguistic homogenization. Furthermore, when these variables are included in regressions predicting economic growth the coefficient on fragmentation is halved and becomes statistically insignificant. Similar results are obtained when the relationship between fragmentation and corruption is examined.
by Eric Gordon Weese.
Ph.D.
17
Berthiere, Clément. "Entanglement, boundaries and holography." Thesis, Tours, 2017. http://www.theses.fr/2017TOUR4017.
Full textAbstract:
La notion d’entropie d’intrication a eu un profond impact sur la physique théorique, particulièrement depuis ces dix dernières années. D’abord introduite afin expliquer l’entropie des trous noirs, son champ d’application s’est par la suite ouvert à une grande variété de domaines de recherche, de la matière condensée à la gravitation quantique, de l’information quantique à la théorie quantique des champs. Dans ce contexte scientifique effervescent, l’entropie d’intrication apparait comme un outil central et doit donc intensivement être étudiée. A l’origine de cette thèse se trouve le désir de mieux comprendre cette entropie. D’intéressants développements concernant les effets de bord sur l’entropie d’intrication ont vu le jour récemment. Nous proposons donc d’explorer comment le bord d’un espace affecte l’entropie, en particulier dans la situation où la surface d’intrication intersecte ce bord. Nous présentons des calculs explicites de l’entropie d’intrication en espace plat avec bords. Nous montrons que des termes induits par ces bords apparaissent dans l’entropie et nous soulignons le rôle prépondérant que jouent les conditions aux bords. Nous étudions ensuite la contribution de bord dans le terme logarithmique de l’entropie d’intrication en dimensions trois et quatre. Nous calculons en premier lieu ce terme en théorie des champs pour la théorie N = 4 de Yang-Mills, puis nous répétons ce calcul de manière holographique. Nous montrons que ces deux méthodes de calcul donnent le même résultat, si du côté théorie des champs les conditions aux bords préservent la moitié de la supersymétrie et que du côté gravité l’extension du bord dans le bulk est une surface minimaleThe entanglement entropy has had a tremendous and profound impact on theoretical physics, particularly since the last decade. First introduced in an attempt to explain black holes entropy, it has then found applications in a wide range of research areas, from condensed matter physics to quantum gravity, from quantum information to quantum field theory. In this exciting scientific context, the entanglement entropy has thus emerged as a useful and pivotal tool, and as such justifies the need to be intensively studied. At the heart of this thesis therefore lies the desire to better understand the entanglement entropy. Interesting developments during the recent years concern the boundary effects on the entanglement entropy. This dissertation proposes to explore the question of how the presence of spacetime boundaries affects the entropy, specifically in situations where the entangling surface intersects these boundaries. We present explicit calculations of entanglement entropy in flat spacetime with plane boundaries. We show that boundary induced terms appear in the entropy and we emphasize the prominent role of the boundary conditions. We then study the boundary contribution to the logarithmic term in the entanglement entropy in three and four dimensions. We perform the field theoretic computation of this boundary term for the free N = 4 super-gauge multiplet and then repeat the same calculation holographically. We show that these two calculations are in agreement provided that on the field theory side one chooses the boundary conditions which preserve half of the full supersymmetry and that on the gravity side the extension of the boundary in the bulk is minimal
18
Varvaruca, Eugen. "Singularities in free boundaries." Thesis, University of Bath, 2005. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419225.
Full text
19
Ahmed, Muaz Ahmed Mohammed. "Sudan boundaries with Egypt and Kenya : a question of state succession to international boundaries." Thesis, University of Cambridge, 1998. https://www.repository.cam.ac.uk/handle/1810/283824.
Full textAbstract:
This thesis is an attempt to examine and analyse two distinct, but related, territorial disputes involving Sudan and two of its neighbours. They concern the area between the administrative boundary and the so-called political boundary between Sudan and Egypt, and the area between the international boundary and the administrative boundary between Sudan and Kenya. The Egyptian claims to the administrative area in 1958 and again in 1992, apparently rests on two main arguments. Firstly, that Egypt possesses immemorial sovereign rights over the disputed areas. Secondly, that the 1899 Agreement between Great Britain and Egypt is the only international boundary agreement resulting from an international instrument, and therefore, could not have been revised by the unilateral Egyptian ministerial decrees of 1899 and 1902. Additionally, Egypt argues that the cession of the disputed areas of Sudan was for administrative reasons only, with Egypt retaining full sovereign rights. Hence, upon independence, Sudan was obliged to return the areas to sovereign, Egypt. It will be argued, that the essence of an international boundary agreement is that it separates two distinct sovereignties. As for the Sudan-Kenya dispute, the boundary was defined by Great Britain in 1914 with the consent of Egypt. It constitutes a straight line to Lake Rudolf to compensate the Sudan for the Mahagi strip ceded to Uganda at the same time. The final analysis is that Kenya has an administrative, not sovereign right, over the Ilemi Triangle. Furthermore, the re-definition of the line in 1947 and 1951, upon Kenya’s request, to include more areas, north and east of the 1938 line, under Kenyan administration supports the argument that the agreement between the two countries was an administrative agreement not a cession of sovereignty. The view of Great Britain as a former colonial power, as well as the corresponding agreement between Sudan and Kenya before 1938 up till Sudan’s independence in 1956, supports this argument.
20
Skaresund, Robert. "Work Integrated Learning : crossing Boundaries." Thesis, University West, Department of Nursing, Health and Culture, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-2687.
Full textAbstract:
Work integrated learning was established at Swedish universities about twenty years ago; and today there are some different attitudes about the purpose of integrating theoretical perspectives to practical experiences, during higher education. For example, there are arguments that students tend to become clients or tools in order to gain regional development if the practical perspectives overcome the possibilities of reflection. Education will in this case only serve to facilitate employment after graduation, rather than to facilitate developmental learning. To understand the relationship between reproductive- and developmental learning, this thesis explores the different kinds of strategies student teachers develop, during their teacher training – to gain the skills and knowledge needed to work as a professional teacher. The focus is how the students respond to the various emerging contradictions, while crossing the boundaries – between the university, and the workplace. The activity theory approach conceptualizes boundary-crossing as a phenomenon based on the idea of horizontal development – which requires the ability to find relevant information wherever it may be available. The implication is that change and development occur as a result of collaboration through mutual boundary objects, and via emerging contradictions between two or more interacting activity systems. The overall design resembles a phenomenological case study performed over a period of approximately six months. The population providing the empirical data consisted of five student teachers, in their first year, attending a teacher training program in Sweden. Data collection where gathered through a three-step design, where exploratory narrative interviews were conducted at three different occasions: (i) after their first period of work placement, (ii) before entering their second period of work placement and (iii) immediately after their second period of work placement. The results indicate that the students’ processes of learning include four distinct learning strategies (questioning, challenging, adjusting and imitating), to transform the information given in various situations. These strategies are consequences of the students´ prior experiences when encountering contradictions during their teacher training program.
För omkring 20 år sedan utvecklades arbetsintegrerat lärande som en ny pedagogisk form på svenska högskolor och universitet Det råder dock delade meningar om syftet bakom högskolans ambition att integrera teoretiska perspektiv till individuella praktiska erfarenheter. Exempelvis riskerar studenter att liknas vid klienter, eller verktyg för regional utveckling om fokus på praktiska erfarenheter överordnas möjligheten till reflektion. Utbildningens roll kan i så fall bli att underlätta anställningsbarhet efter examen istället för att leda till ett utvecklingsinriktat lärande. För att förstå relationen mellan anpassnings- och utvecklingsinriktat lärande undersöker denna uppsats vilka strategier lärarstudenter utvecklar, under utbildning på lärarprogrammet, för att uppbära den kunskap som behövs för att kunna arbeta som lärare. Fokus ligger på hur studenterna svarar mot de varierande motsättningar som uppstår vid övergångarna mellan högskolan och arbetsplatsen. Uppsatsen utgår från verksamhetsteoretiska resonemang och speciellt fenomenet ”boundary-crossing” som innebär grunden för horisontell utveckling och innefattar förmågan att finna relevant information där den är tillgänglig. Utgångspunkten är att förändring och utveckling sker som ett resultat av samverkan mot gemensamma mål och på grund av motsättningar mellan två eller flera verksamhetssystem. Det övergripande upplägget av studien kan liknas vid en fenomenologisk fallstudie och utfördes under sex månader. Populationen som ligger till grund för studiens empiriska data består av fem lärarstudenter som studerar sitt första år vid en av Sveriges lärarutbildningar. Data samlades in genom narrativa intervjuer vid tre olika tillfällen: (i) efter studenternas första praktikperiod, (ii) innan studenterna påbörjade sin andra praktikperiod och (iii) direkt efter att studenterna avslutat sin andra praktikperiod. Studiens resultat visar att lärarstudenterna använder fyra olika lärandestrategier (ifrågasättande, utmanande, anpassande och imiterande), för att omvandla den information de möter till kunskap, vid olika tillfällen under lärarutbildningen. Dessa strategier utvecklas som följd av de erfarenheter studenterna har med sig när de möter olika motsättningar under lärarutbildningen.
21
Kahle, Thomas. "On Boundaries of Statistical Models." Doctoral thesis, Universitätsbibliothek Leipzig, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-37952.
Full textAbstract:
In the thesis "On Boundaries of Statistical Models" problems related to a description of probability
distributions with zeros, lying in the boundary of a statistical model, are treated. The
distributions considered are joint distributions of finite collections of finite discrete random
variables. Owing to this restriction, statistical models are subsets of finite dimensional real
vector spaces. The support set problem for exponential families, the main class of models considered
in the thesis, is to characterize the possible supports of distributions in the boundaries of these
statistical models. It is shown that this problem is equivalent to a characterization of the face
lattice of a convex polytope, called the convex support. The main tool for treating questions
related to the boundary are implicit representations. Exponential families are shown to be sets of
solutions of binomial equations, connected to an underlying combinatorial structure, called oriented
matroid. Under an additional assumption these equations are polynomial and one is placed in the
setting of commutative algebra and algebraic geometry. In this case one recovers results from
algebraic statistics. The combinatorial theory of exponential families using oriented matroids makes
the established connection between an exponential family and its convex support completely natural:
Both are derived from the same oriented matroid.
The second part of the thesis deals with hierarchical models, which are a special class of
exponential families constructed from simplicial complexes. The main technical tool for their
treatment in this thesis are so called elementary circuits. After their introduction, they are used
to derive properties of the implicit representations of hierarchical models. Each elementary circuit
gives an equation holding on the hierarchical model, and these equations are shown to be the
"simplest", in the sense that the smallest degree among the equations corresponding to elementary
circuits gives a lower bound on the degree of all equations characterizing the model. Translating
this result back to polyhedral geometry yields a neighborliness property of marginal polytopes, the
convex supports of hierarchical models. Elementary circuits of small support are related to
independence statements holding between the random variables whose joint distributions the
hierarchical model describes. Models for which the complete set of circuits consists of elementary
circuits are shown to be described by totally unimodular matrices. The thesis also contains an
analysis of the case of binary random variables. In this special situation, marginal polytopes can
be represented as the convex hulls of linear codes. Among the results here is a classification of
full-dimensional linear code polytopes in terms of their subgroups.
If represented by polynomial equations, exponential families are the varieties of binomial prime
ideals. The third part of the thesis describes tools to treat models defined by not necessarily
prime binomial ideals. It follows from Eisenbud and Sturmfels' results on binomial ideals that these
models are unions of exponential families, and apart from solving the support set problem for each
of these, one is faced with finding the decomposition. The thesis discusses algorithms for
specialized treatment of binomial ideals, exploiting their combinatorial nature. The provided
software package Binomials.m2 is shown to be able to compute very large primary decompositions,
yielding a counterexample to a recent conjecture in algebraic statistics.
22
Weigand, Marcus. "Grain boundaries in coated conductors." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/226744.
Full textAbstract:
The excitement which followed the discovery of high-temperature superconductors in 1986 was short-lived, as it became clear that their current carrying capacity (the critical current density Jc) was limited by grain boundaries (GBs). In order to reduce their detrimental effects coated conductors have been developed, in which a superconducting thin film is deposited on a polycrystalline, textured substrate. Within certain temperature and magnetic field ranges, however, GBs still limit the overall Jc. This fact motivated the present thesis, for which the electrical properties of different types of coated conductors, and in particular their GBs, were investigated. Several GBs and a single grain were isolated in a tape produced by metal-organic deposition (MOD), using a novel approach based on electron backscatter diffraction and a focused ion beam microscope. Measurements of their critical current densities for fields swept in the film plane showed the expected decrease with increasing misorientation angle at low fields. At higher fields an angle dependent crossover was found, from a GB to grain limited Jc. In order to confirm this result and put it into broader perspective, the dependence of Jc on the width of polycrystalline tracks was studied, and then explained in terms of the behaviour of the single GBs. Investigations using low-temperature scanning laser microscopy rounded out the picture, which also showed GB dissipation at certain angles and grain limitation at others. In measurements on samples produced by metal-organic chemical vapour deposition (MOCVD) characteristic differences compared to the MOD film were found. While both conductors exhibited high values of Jc, the variation with in-plane angle was significantly stronger for the MOCVD conductor, which can be explained by its sharper texture. In a track patterned perpendicular to the tape direction the phenomenon of vicinal channelling was observed, which previously was known only from films on single crystal substrates. Finally, an isolated boundary showed very high values of Jc, consistent with its low misorientation. In order to better understand how the substrate influences the superconducting properties, measurements were carried out on otherwise identical samples grown on different substrates. A tape with grains elongated along its rolling direction showed particularly good properties at all examined field orientations. This extends the previously reported result that high aspect ratios are beneficial at fields applied perpendicular to the tape plane.
23
Yi, Jianglin. "Transport boundaries for pneumatic conveying." Faculty of Engineering, 2001. http://ro.uow.edu.au/theses/1840.
Full textAbstract:
Pneumatic conveying is being selected for an increasing number of industrial applications and products and is playing a more vital and integral role in the transportation of solid materials such as plastic pellets, grain and chemicals. However, despite all the minimum conveying velocity research (one of the operating boundaries for pneumatic conveying) that has been undertaken for several decades, the wide scatter and contradictions in the predictions of the minimum conveying velocity for dilute phase pneumatic conveying exist yet, determination of the operating boundaries for pneumatic conveying (mainly maximum conveying velocity for dense phase and minimum conveying velocity for dilute phase) still has been one of the most important tasks to be solved for the design, optimising and upgrade of pneumatic conveying systems as a consequence of that the mechanisms involved in the formation of boundaries between dilute-phase and dense-phase pneumatic conveying through a horizontal pipeline have not been well explored.Saltation velocity was investigated initially in this thesis and then the emphasis was placed on the transition between dilute-phase and dense-phase. With careful observations, it is found that pneumatic conveying of granular solid materials through a horizontal pipeline can exhibit five different flow modes (as the air velocity is decreased): fully suspended flow; strand flow; stable or unstable strand flow over a stationary layer for low solid mass flow rates; stable or unstable strand flow over a slowly moving bed for high solid mass flow rates; low-velocity slug-flow. The pressure fluctuations within the unstable zone result from the flow mode alternation between a strand flow over a stationary layer (or slowly moving bed) and slug flow starting at the inlet due to a decrease in air velocity. The first slug moves quickly at a relatively high velocity and picks up a relatively thick stationary layer in front of it but only deposits a small amount of the material behind it. The increase in slug length and large increase in pressure cause severe pressure fluctuations and pipeline vibrations. Two different flow modes may exist simultaneously in the conveying pipeline: strand flow over a stationary layer or slowly moving bed near the feed point followed by the dilute-phase (suspension) flow of particles. For the latter, material erodes away from the end of the stationary layer or slowly moving bed and is conveyed in the form of small dunes (or pulsating strand flow).Based on the mass balance, force balance, momentum balance and the unstable flow forming mechanism, a theoretical three-layer model for the prediction of the transition zone boundaries has been established. With stability analysis, the boundaries of the transition zone in the state diagram have been identified, and have been found to agree very well with experimental data. According to the model established, the discussion on the influence of design parameters of particle and bulk properties of the material being conveyed and pipe wall properties on boundaries in the state diagram has been conducted.The discussion on the operating boundaries for pneumatic conveying of granular materials has been extended to conveying of powder materials and a principle for classification of granular materials and powder materials, which have different flow mode in PCC, has been proposed.The research also has been carried out on the pressure drop prediction for pneumatic conveying of granular materials in the form of low-velocity slug-flow in order to have a perfect PCC state diagram. A new approach for the direct measurement of stress transmission factor has been developed in this thesis. The effect of the weight of the granular material in the slug on pressure drop is taken in account according to the experimental test results. The model for pressure drop prediction also includes a modified equation for the frontal force of the moving slug - allowing for momentum balance of accelerating particles and the additional force from the stationary layer to resist the movement. The modelling predictions agree very well with test results obtained on poly pellets conveyed through 98 mm and 60.3 mm ID horizontal stainless steel pipelines, each 21 m in length.
24
Mostafavi, Iman. "Remeshing with learned image boundaries." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p1450164.
Full textAbstract:
Thesis (M.S.)--University of California, San Diego, 2008.Title from first page of PDF file (viewed March 27, 2008). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 47-49).
25
Maverley, Suzanne Isabella. "Unclear Boundaries and Faraway Views." Thesis, KTH, Arkitektur, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117598.
Full textAbstract:
Located in the Harbour of Cork, this work encourages the Harbour to turn back upon itself and re-establish the collective memory of transport by water. It was inspired by the Harbour Authority’s decision to introduce a passenger ferry network, servicing the City and the towns along the harbour. The meeting of the people and their harbour is to be finely nuanced through new installations, which facilitate the landing of these new vessels. Without these comprehensible points, which together create boundaries and act as threshold, the harbour is immense and continually shifting. These interventions intend to create a middle space between the landscape edge and the vast harbour: a type of ‘airlock’ which prepares the pedestrian for passage, using tools of sequencing and reframing to direct views. The project is investigated through mapping with an architecture that addresses the shifting scale along the harbour and a conversation begins between the macro and microcosm.
26
Beauvais, Edana. "Talking across boundaries: interracial deliberation." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/34598.
Full textAbstract:
The purpose of my work is to clarify the contingencies that enable the normative expectations of deliberative democracy in the context of interracial deliberation, as well as to understand the conditions under which deliberation contributes to the contrary, and catalyzes racial prejudice and group polarisation. I argue that understanding how interracial deliberation can promote the expectations of deliberative theory, such as the identification of common interests or mutual-recognition across racial divides, entails understanding the context under which discourse takes place. For instance, I show that communication between members of different races is less likely to promote beneficial outcomes when discussion partners suffer from economic or material insecurity, and if resultant interracial interactions are characterized by fear, distrust, or hatred. The role of emotions is central to my understanding of the possibility for successful discourse.
In this piece I justify the use of deliberative theory as a framework for understanding race-relations and white values and opinions. I also consider the macro-level antecedents to affect; that is, I consider the structural features of American society that shape the feelings whites harbour toward blacks. The importance of affect for deliberation is reviewed. The effects of interracial socialisation and diversity in communication networks on value and opinion formation are also considered. In this piece I employ original research to clarify the relationship between affect, interracial socialisation, and the racial attitudes of whites. Using data from the Detroit Area Study (2004) I find that variables measuring both the social and economic well-being of neighbourhoods, as well as a variable measuring beliefs about ‘special favours’ for blacks, have a significant impact on the feelings whites harbour toward blacks.
27
O'Bryne, Derek. "Managing boundaries in merger integration." Thesis, University of Warwick, 2008. http://wrap.warwick.ac.uk/2376/.
Full textAbstract:
This thesis explores how boundaries can be changed during a merger. Change literature has generally assumed boundaries are an unproblematic aspect of organisation life; readily definable and easily changed. Evidence from the emerging field of boundary theory suggest otherwise with boundaries seen as socially constructed, complex and ever-shifting. The thesis adopts an action-orientated methodology, drawing from three sources of theory building; existing theory, fieldwork and from practice. Defining boundaries as any difference between groups, the thesis categorises boundaries as physical, behavioural and cognitive and uncovers specific tensions that are unique to each boundary category and which require specific management interventions to resolve. Developing these insights, the action research study, a five-year process of merging two hospitals, explored how boundaries changed in practice, showing how boundary salience was influenced by two sets of interrelated strategies. One set drove integration and the other set drove separation. The thesis concludes with five theoretical insights into boundary change. Principal among these is the insight that boundary change can only come about when the boundary tensions are reduced and when the strategies supporting integration are dominant. The thesis contributes to the theoretical understanding of boundaries and M&A integration but also to the practising manager by providing a framework for the analysis of boundaries and the determination of actions that reduce tensions and create the appropriate environment for effective boundary change.
28
Day, Peter. "Invisible boundaries : a photographic archive." Thesis, University of Derby, 2007. http://hdl.handle.net/10545/317459.
Full textAbstract:
Invisible Boundaries has as its practical project a photographic archive of 1200 images that sequentially documents and records my living space by (re- )visiting the same locations, objects, traces and detritus over a period of three years, 1999 to 2002. This resulted in two major national exhibitions at the Michael Tippet Centre, Bath Spa University 2002 and The Thelma Hulbert Gallery, Honiton 2005. Here photographs from the project Invisible Boundaries were displayed in 27 enlarged photographic images and a cdrom of 700 images. My written dissertation describes and explores the relationship between my varIOUS recording methods and the various evocative outcomes produced as an exhibition, where images are visually enlarged, magnified and displayed, and a cdrom, where implicit details are archived and revealed in greater scope and magnitude. Chapters 1 and 2 (The Work and The Archive) explore in detail the photographic collection in my work and explicitly in two major works, Gerhardt Richter's Atlas (2004) and Sol LeWitt's Autobiography (1980), two large bodies of archived photographic works. In Chapter 3 The Domestic and Personal, Invisible Boundaries is considered alongside modern documentary practice relative to the home context through the images of Martin Parr, Nan Goldin and Larry Sultan. Both personal and objective, my thesis specifically analyses the projects Signs of the Times (Parr 1992), The Ballad of Sexual Dependency (Goldin 1982) and Pictures from Home (Sultan 1989). The practical work allowed for the single image to be taken, stored and reviewed against a larger body of images that formed the archive. This practical analysis is concluded in Chapter 4, Photographic Fiction and Loss, which draws on the contexts of documentary and archival practice established in my work, where these works become an emotional and nostalgic product. Throughout all chapters I am interested in the continued dominance of the singular image in contemporary writing at a time when digital technology and culture are making the multiplicity of images prevalent. Overall Invisible Boundaries is an in-direct autobiographical and cumulative photographic archive. Through its continuous photographic recording of the rooms, spaces and items in my home, it shows how the tracings and residues of an existence and the banality of moments, holistically form an archive of historical moments, which also says something about my life.
29
Yaman, Asli. "Boundaries of relatively hyperbolic groups." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432635.
Full text
30
LAGE, VICTOR COUTINHO. "POLITICS: BOUNDARIES, LIMITS AND SUBJECTIVITIES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2011. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=17913@1.
Full textAbstract:
FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIROEsta dissertação propõe uma perspectiva alternativa acerca da modernidade e da política moderna. Para tanto, divide-se em cinco grandes partes: além da introdução e da conclusão, há três capítulos centrais dedicados a textos de cinco pensadores considerados clássicos. O primeiro dos capítulos centrais se lança à problematização do sujeito moderno, através de alguns textos de Montaigne e Descartes. O capítulo seguinte parte das fronteiras do sujeito para as fronteiras do Estado moderno: com Maquiavel e Hobbes, a discussão se volta à produção do Estado nas articulações espaço-temporais. Em seguida, o capitulo dedicado a Kant defende que sujeito, Estado e sistema são epicentros da modernidade e que nele as aporias entre Montaigne e Descartes e entre Maquiavel e Hobbes estão expressas com ainda maior complexidade. Operando nos limites, origens e fins, desses epicentros, a interpretação aqui proposta das três críticas e dos escritos políticos de Kant busca interpretá-lo como a máxima expressão das insolúveis contradições da modernidade na relação entre o universal e o particular. A perspectiva deste texto opera na íntima imbricação entre sujeito, Estado e sistema internacional modernos. Somente dessa forma é que se pode consolidar sua reivindicação central, que poderia ser formulada da seguinte maneira: a política é a produção de limites, fronteiras e subjetividades na interação com a alteridade. Ao final do texto, pretende-se que muitas aberturas tenham sido feitas, consciente e inconscientemente, não se perdendo de vista, no entanto, que muitos fechamentos terão sido promovidos, consciente e inconscientemente.
This dissertation proposes an alternative perspective on modernity and modern politics. To that task, it is divided in five major parts: in addition to the introduction and the conclusion, there are three central chapters devoted to texts from five thinkers considered classics. The first of these chapters problematizes the modern subject through some of Montaigne’s and Descartes’ texts. The next one goes from the boundaries of the modern subject to the boundaries of the modern State: with Machiavelli and Hobbes, it is discussed the production of the State in spatio-temporal articulations. Then, the chapter dedicated to Kant claims that subject, State and system are epicenters of modernity and that in Kant are expressed, in even more complexity, both the aporias between Montaigne and Descartes and between Machiavelli and Hobbes. Working in the limits, origins and ends, of these epicenters, the interpretation proposed of the Kant’s three critiques and of his political writings aims at interpreting him as the highest expression of modernity’s insoluble contradictions in the relation between the universal and the particular. This text’s perspective works in the intimate imbrications among modern subject, modern State and modern international system. Only this way can consolidate its central claim that could be formulated as follows: politics is the production of limits, boundaries and subjectivities in the interaction with otherness. At the end, the text intends to provide with many conscious and unconscious openings, without losing sight that many closures will also be promoted, consciously and unconsciously
31
Zietal, Robert J. "Quantum elecrodynamics near material boundaries." Thesis, University of Sussex, 2010. http://sro.sussex.ac.uk/id/eprint/2520/.
Full textAbstract:
Quantum electrodynamics in free-space is a well-understood and a very successful theory. This is not the case when polarizable boundaries are present, which is a common scenario. The presence of reflective surfaces affects the photon field. Thereby the quantummechanical vacuum fluctuations of the electromagnetic field are constrained leading to changes in the interaction energies of charged particles which are directly measurable. One of the most famous examples of such an effect is the Lamb shift of an atom in front of a perfectly reflecting mirror, which depends on the distance of the atom from the mirror, thus giving rise to an attractive force - the so-called Casimir-Polder force. This thesis touches upon current challenges of quantum electrodynamics with externally applied boundary conditions, which is of increasing importance for nanotechnology and its applications in physics, chemistry and biology. When studying the abovementioned vacuum effects one can use models of various degrees of sophistication for the material properties that need to be taken into account. The simplest is to assume perfect reflectivity. This leads to simple boundary conditions on the electromagnetic field and thereby its quantum fluctuations. The difficulty of such calculations then lies only in the possibly complex geometry of the macroscopic body. The next possible level of sophistication is to allow imperfect reflectivity. The simplest way to achieve this is by considering a material with constant and frequency-independent refractive index. However, for all real material surfaces the reflectivity is frequency-dependent. Causality then requires that dispersion is accompanied by absorption. The aim of this project was twofold: (i) to construct, using well-understood tools of theoretical physics, the microscopic theory of quantum systems, like atoms, interacting with macroscopic polarizable media, which would facilitate relatively simple perturbative calculations of QED corrections due to the presence of boundaries, (ii) to apply the developed formalism to the calculation of the Casimir-Polder force between an atom and a realistic material.
32
Carlotti, Pierre. "Distorted turbulence near rigid boundaries." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621388.
Full text
33
Jottrand, L. M. S. "Shadow boundaries of convex bodies." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1384789/.
Full textAbstract:
If C is a convex body in R^n and X is a k-dimensional linear subspace of R^n, we denote by S(C,X) the shadow boundary of C over X which is defined as the collection of all points which belong to C and to one of its tangent (n-k)-flats orthogonal to X. For almost all directions in R^3, the shadow boundary is a curve encompassing the body C. It has been established long ago by G. Ewald, D.G. Larman and C.A. Rogers [11] that, for every given C, S(C,X) is almost always a topological (k-1)-sphere. As a follow on from this result, in 1974 Peter McMullen asked whether most of these shadow boundaries would have finite “length” [15]. This is already shown to be true for polytopes and also true for general convex bodies when the dimension of the subspace X is 1 or n-1. Here we show that almost all shadow boundaries have finite “length” whatever the dimension k, 0< k< n, of the subspace X. The set of shadow boundaries of infinite “length” has also been considered in the context of Baire category. In 1989, P. Gruber and H. Sorger proved that, in the Baire category sense, most pairs (C,X), where C is a convex body in R^n and X an (n-1)-dimensional subspace of R^n, produce shadow boundaries S(C,X) of infinite length. Here we show that this result also holds for pairs (C,X) where X is a k-dimensional subspace, 0< k< n. We also consider the length of increasing paths in the 1-skeleton of a convex body. We conclude with observations and open questions arising from the work on shadow boundaries of the first two chapters.
34
Culley, Sheena. "Comfort : bodies and their boundaries." Thesis, Kingston University, 2015. http://eprints.kingston.ac.uk/29964/.
Full textAbstract:
The original contribution of this work is its engagement with the conceptualisation of modern bodies and the impact of the bounded body on our understanding of the idea of comfort. The way in which modern bodies are constituted as bounded, immune entities, differentiated from their surroundings, is of paramount importance in defining comfort as protective, compensatory and passive - a zero grade feeling or avoidance of stimuli. Taking a definition of comfort from John Crowley's influential work on the topic as 'a self-conscious satisfaction between one's body and its immediate physical environment' as its point of departure, this thesis interrogates this in-between space to argue for comfort as an affective and intensive experience. Approaching the theme from an interdisciplinary perspective, a genealogical method combined with inspiration from new materialisms challenges dualisms such as nature/culture, body/mind, inside/outside, body/environment and comfort/discomfort. Following the trajectory of work from Nietzsche to Foucault to Deleuze, phenomenological and psychoanalytical ideas of boundedness and identity are displaced with a theory of bodies as fortuitous and dynamic compositions of forces, where affirmative difference replaces negative difference. As a result, the comfort zone, comfortable numbness and sitting comfortably are transformed from states of indifference to intensive events of difference whereby boundaries and borders are reconstituted as thresholds and spaces of transformation.
35
Niedner, Benjamin. "Random matrices, boundaries and branes." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:ad265aa2-43de-4c20-bf0d-1e17e91ed21a.
Full textAbstract:
This thesis is devoted to the application of random matrix theory to the study of random surfaces, both discrete and continuous; special emphasis is placed on surface boundaries and the associated boundary conditions in this formalism. In particular, using a multi-matrix integral with permutation symmetry, we are able to calculate the partition function of the Potts model on a random planar lattice with various boundary conditions imposed. We proceed to investigate the correspondence between the critical points in the phase diagram of this model and two-dimensional Liouville theory coupled to conformal field theories with global W-symmetry. In this context, each boundary condition can be interpreted as the description of a brane in a family of bosonic string backgrounds. This investigation suggests that a spectrum of initially distinct boundary conditions of a given system may become degenerate when the latter is placed on a random surface of bounded genus, effectively leaving a smaller set of independent boundary conditions. This curious and much-debated feature is then further scrutinised by considering the double scaling limit of a two-matrix integral. For this model, we can show explicitly how this apparent degeneracy is in fact resolved by accounting for contributions invisible in string perturbation theory. Altogether, these developments provide novel descriptions of hitherto unexplored boundary conditions as well as new insights into the non-perturbative physics of boundaries and branes.
36
Iniotakis, Jan-Mark. "Boundaries for CAT(0) groups." Thesis, University of Warwick, 2003. http://wrap.warwick.ac.uk/105031/.
Full textAbstract:
In this thesis we construct a boundary δG for an arbitrary CAT(0) group G. This boundary is compact and invariant under group isomorphisms. It carries a canonical (possibly trivial) G-action by homeomorphisms. For each geometric action of G on a CAT(0) space X there exists a canonical G-equivariant continuous map T : δG → δX. If G is a word-hyperbolic CAT(0) group, its boundary δG coincides with the usual Gromov boundary. If G is free abelian of rank k, its boundary is homeomorphic to the sphere Sk-1. For product groups of the types G X Zk and G x H, where G and H are non-elementary word-hyperbolic CAT(0) groups, the boundary is worked out explicitly. Finally, we prove that the marked length spectrum associated to a geometric action of a torsion-free word-hyperbolic group on a CAT(0) space determines the isometry type of the CAT(0) space up to an additive constant.
37
Kahle, Thomas. "On Boundaries of Statistical Models." Doctoral thesis, Max-Planck-Institut für Mathematik in den Naturwissenschaften, 2009. https://ul.qucosa.de/id/qucosa%3A11003.
Full textAbstract:
In the thesis "On Boundaries of Statistical Models" problems related to a description of probability
distributions with zeros, lying in the boundary of a statistical model, are treated. The
distributions considered are joint distributions of finite collections of finite discrete random
variables. Owing to this restriction, statistical models are subsets of finite dimensional real
vector spaces. The support set problem for exponential families, the main class of models considered
in the thesis, is to characterize the possible supports of distributions in the boundaries of these
statistical models. It is shown that this problem is equivalent to a characterization of the face
lattice of a convex polytope, called the convex support. The main tool for treating questions
related to the boundary are implicit representations. Exponential families are shown to be sets of
solutions of binomial equations, connected to an underlying combinatorial structure, called oriented
matroid. Under an additional assumption these equations are polynomial and one is placed in the
setting of commutative algebra and algebraic geometry. In this case one recovers results from
algebraic statistics. The combinatorial theory of exponential families using oriented matroids makes
the established connection between an exponential family and its convex support completely natural:
Both are derived from the same oriented matroid.
The second part of the thesis deals with hierarchical models, which are a special class of
exponential families constructed from simplicial complexes. The main technical tool for their
treatment in this thesis are so called elementary circuits. After their introduction, they are used
to derive properties of the implicit representations of hierarchical models. Each elementary circuit
gives an equation holding on the hierarchical model, and these equations are shown to be the
"simplest", in the sense that the smallest degree among the equations corresponding to elementary
circuits gives a lower bound on the degree of all equations characterizing the model. Translating
this result back to polyhedral geometry yields a neighborliness property of marginal polytopes, the
convex supports of hierarchical models. Elementary circuits of small support are related to
independence statements holding between the random variables whose joint distributions the
hierarchical model describes. Models for which the complete set of circuits consists of elementary
circuits are shown to be described by totally unimodular matrices. The thesis also contains an
analysis of the case of binary random variables. In this special situation, marginal polytopes can
be represented as the convex hulls of linear codes. Among the results here is a classification of
full-dimensional linear code polytopes in terms of their subgroups.
If represented by polynomial equations, exponential families are the varieties of binomial prime
ideals. The third part of the thesis describes tools to treat models defined by not necessarily
prime binomial ideals. It follows from Eisenbud and Sturmfels'' results on binomial ideals that these
models are unions of exponential families, and apart from solving the support set problem for each
of these, one is faced with finding the decomposition. The thesis discusses algorithms for
specialized treatment of binomial ideals, exploiting their combinatorial nature. The provided
software package Binomials.m2 is shown to be able to compute very large primary decompositions,
yielding a counterexample to a recent conjecture in algebraic statistics.
38
Kaldy, David A. "Reactive Boundaries: Movement Informing Design." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1242677314.
Full text
39
Brack, David. "Social boundaries in Luke-Acts." Theological Research Exchange Network (TREN), 2008. http://www.tren.com/search.cfm?p031-0179.
Full text
40
Kaldy, David. "Reactive boundaries movement informing design /." Cincinnati, Ohio : University of Cincinnati, 2009. http://rave.ohiolink.edu/etdc/view.cgi?acc_num=ucin1242677314.
Full textAbstract:
Thesis (Master of Architecture)--University of Cincinnati, 2009.Advisor: Rebecca Williamson. Title from electronic thesis title page (viewed July 27, 2009). Includes abstract. Keywords: movement; transient; constant react flexibility; modify space; variable blur; boundary body time remnant; infrastructure abandon; literal phenomenal; malleable; inside outside train rail; edge urban; rotate slide shift direction; record vehicle pedestrian bi. Includes bibliographical references.
41
Delgado, Huitrón Cynthia Citlallin. "Boundaries transgressed : action-reaction-repercussion ; /." Connect to online version, 2009. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2009/369.pdf.
Full text
42
Ouyang, Hao Fultz B. Fultz B. "Grain boundaries of nanophase materials /." Diss., Pasadena, Calif. : California Institute of Technology, 1993. http://resolver.caltech.edu/CaltechETD:etd-08312007-095729.
Full text
43
Brack, David Lee. "Social boundaries in Luke-Acts." Cincinnati, OH : Cincinnati Christian University, 2008. http://dx.doi.org/10.2986/tren.031-0179.
Full text
44
Gianni, Eugenia. "Children's representation of spatial boundaries." Doctoral thesis, Università degli studi di Trento, 2018. https://hdl.handle.net/11572/369085.
Full textAbstract:
Finding the way home, orienting into familiar and unfamiliar environments, computing our place and position with reference to internal and external cues are essential everyday tasks for animals. It is generally acknowledged that these tasks are accomplished by the brain by means of the internal formation of complex spatial representation, the so called “cognitive maps†. How the brain can form these cognitive maps is a very debated issue in the field of neuroscience. An important stream of research tried to find out what the main environmental features the brain tends to store while navigating are. In order to investigate this, researchers have observed the behavior of animals after being disoriented in a familiar environment. The reorientation paradigm turned out to be a very interesting tool to study spatial cognition because it allows researchers to figure out which environmental components the animals remember and rely on in order to find their way after they have lost track of their heading and position. Experiments with both human adults, children and nonhuman animals have shown that an important feature of the environment the subjects tend to store to reorient is the geometry of the boundaries’ layout (e.g., room shape). Children from as early as 2 years of age have been shown to be able to use the geometric shape of the spatial layout by searching an object hidden in one corner of a rectangular enclosure both in the correct corner and in its geometric equivalent. But which perceptual and physical factors define spatial boundaries? Which geometric components of boundaries are children most sensitive to? How are the same geometric components used in other spatial tasks such as map reading?
In our studies we tried to answer these fundamental questions. In our first study we investigated whether children are sensitive to boundaries that constitute either physical or visual obstacles. To this aim we tested children in a reorientation task with both an arena made up of transparent surfaces and an arena made up of opaque surfaces. By using transparent surfaces, we were able to minimize the visually occlusive component of the boundaries but leave intact its physical component. Opaque boundaries presented, instead, both the visual and physical components. In our second study, we further investigated how does the material and visual appearance of boundaries affect navigation by testing children in an arena made up of 20 closely-aligned objects. In this experiment we made the surfaces visually discontinuous, but the configuration of objects was made sufficiently dense to prevent movement and to underline the geometric structure. In our third study, we asked which components of the Euclidean geometry are children most sensitive to while navigating by geometric boundaries and making a map task. In particular we investigated the use of distance and length both in a reorientation task and a map-placement task.
The results showed that important developmental changes occur in children’s representation of spatial boundaries and of their geometric components. In particular children became proficient at using transparent surfaces only at the age of five and they start using boundaries made up of closely- aligned objects at the age of seven. At the same time, we showed that the young children (36 to 42 months) reorient correctly in a disorientation task by using the geometric property of distance, rather than length. The same group of children were shown not to be able to use distance nor length in a map task, while they showed the ability to use angle.
These results suggest that not all kinds of boundaries are processed equally by children and that their visual aspect might be more important that their property of being obstacles to movement, particularly early in development. They are important because they inform of which material and physical properties of boundaries children are most sensitive to and they can help understanding how to design and build safe environments for children. Moreover, they suggest the geometric property used by young children to reorient is distance, essentially contributing to the wide debate on how children and animals could solve the reorientation task. Finally, they showed that the use of geometric properties in a reorientation task and in a map task might have two different developmental trajectories, suggesting these two competences might be mediated by two different systems and providing an important insight into the development of geometric competences in children.
45
Gianni, Eugenia. "Children's representation of spatial boundaries." Doctoral thesis, University of Trento, 2018. http://eprints-phd.biblio.unitn.it/3450/1/Eugenia_Gianni_Thesis.pdf.
Full textAbstract:
Finding the way home, orienting into familiar and unfamiliar environments, computing our place and position with reference to internal and external cues are essential everyday tasks for animals. It is generally acknowledged that these tasks are accomplished by the brain by means of the internal formation of complex spatial representation, the so called “cognitive maps”. How the brain can form these cognitive maps is a very debated issue in the field of neuroscience. An important stream of research tried to find out what the main environmental features the brain tends to store while navigating are. In order to investigate this, researchers have observed the behavior of animals after being disoriented in a familiar environment. The reorientation paradigm turned out to be a very interesting tool to study spatial cognition because it allows researchers to figure out which environmental components the animals remember and rely on in order to find their way after they have lost track of their heading and position. Experiments with both human adults, children and nonhuman animals have shown that an important feature of the environment the subjects tend to store to reorient is the geometry of the boundaries’ layout (e.g., room shape). Children from as early as 2 years of age have been shown to be able to use the geometric shape of the spatial layout by searching an object hidden in one corner of a rectangular enclosure both in the correct corner and in its geometric equivalent. But which perceptual and physical factors define spatial boundaries? Which geometric components of boundaries are children most sensitive to? How are the same geometric components used in other spatial tasks such as map reading?
In our studies we tried to answer these fundamental questions. In our first study we investigated whether children are sensitive to boundaries that constitute either physical or visual obstacles. To this aim we tested children in a reorientation task with both an arena made up of transparent surfaces and an arena made up of opaque surfaces. By using transparent surfaces, we were able to minimize the visually occlusive component of the boundaries but leave intact its physical component. Opaque boundaries presented, instead, both the visual and physical components. In our second study, we further investigated how does the material and visual appearance of boundaries affect navigation by testing children in an arena made up of 20 closely-aligned objects. In this experiment we made the surfaces visually discontinuous, but the configuration of objects was made sufficiently dense to prevent movement and to underline the geometric structure. In our third study, we asked which components of the Euclidean geometry are children most sensitive to while navigating by geometric boundaries and making a map task. In particular we investigated the use of distance and length both in a reorientation task and a map-placement task.
The results showed that important developmental changes occur in children’s representation of spatial boundaries and of their geometric components. In particular children became proficient at using transparent surfaces only at the age of five and they start using boundaries made up of closely- aligned objects at the age of seven. At the same time, we showed that the young children (36 to 42 months) reorient correctly in a disorientation task by using the geometric property of distance, rather than length. The same group of children were shown not to be able to use distance nor length in a map task, while they showed the ability to use angle.
These results suggest that not all kinds of boundaries are processed equally by children and that their visual aspect might be more important that their property of being obstacles to movement, particularly early in development. They are important because they inform of which material and physical properties of boundaries children are most sensitive to and they can help understanding how to design and build safe environments for children. Moreover, they suggest the geometric property used by young children to reorient is distance, essentially contributing to the wide debate on how children and animals could solve the reorientation task. Finally, they showed that the use of geometric properties in a reorientation task and in a map task might have two different developmental trajectories, suggesting these two competences might be mediated by two different systems and providing an important insight into the development of geometric competences in children.
46
Zubrzycki, Joanna. "The construction of personal and professional boundaries in Australian social work: a qualitative exploration of the self in practice." Thesis, Curtin University, 2003. http://hdl.handle.net/20.500.11937/526.
Full textAbstract:
The boundary between the personal and the professional self is a site of professional and personal creativity and tension, a space that reflects some of the key ontological and epistemological issues confronting social work. Exploring the social construction of the self through the stories of fifteen Australian social workers brings these issues into stark relief. The participatory and reflexive research process facilitated the development of knowledge about how a group of culturally diverse social workers construct personal and professional boundaries in practice.The need to explore these processes and relationships was predicated on a concern that while the self is generally recognised as shaping practice, there has been a paucity of attention given to what lived experiences constitute the self. Social work practice is broadly defined as a socially constructed profession, yet the personal and professional boundary is regarded as individually constructed and defined. This discourse neglects the influence of contextual, cultural, relational and structural dimensions of the self, thus denying the possibilities of practice being continually informed by a myriad of experiences.Recognising that the socially constructed self is situated within intersections of knowledge and meaning opens up possibilities for the development of dialogical practices within an ethics of care. The research also has implications for social work practice and education and for the way that we supervise and manage social work staff. Professional dialogue, debate and practice needs to reflect a diversity of experiences and recognise that the dominant discourse about boundaries and the self leaves many workers feeling that their practice reality is not a shared one.
47
Fenlon, J. J. "Seeing sentence boundaries : the production and perception of visual markers signalling boundaries in signed languages." Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/20214/.
Full textAbstract:
Current definitions of prosody present a problem for signed languages since they are based on languages that exist in the oral-aural modality. Despite this, researchers have illustrated that although signed languages are produced in a different modality, a prosodic system exists whereby a signed stream can be structured into prosodic constituents and are marked by systematic manual and non-manual phenomena (see Nespor & Sandler, 1999; Wilbur, 1999, 2000). However, there is little research examining prosody in British Sign Language (BSL). This thesis represents the first serious attempt to address this gap in the literature by investigating the type and frequency of a number of visual markers at intonational phrase (IP) boundaries in BSL narratives. An analysis of 418 IP boundaries shows linguistic visual markers are not frequently observed. The most frequent marker observed were single head movements (46%) followed by holds (30%) and brow movement (22%) and head nods (21%). This finding suggests that none of the visual markers included in this study can be considered a consistent marker to IP boundaries in BSL narratives. As well as examining the production of markers at IP boundaries, the perception of boundaries by different groups in a series of online segmentation experiments is investigated. Results from both experiments indicate that boundaries can be identified in a reliable way even when watching an unknown signed language. In addition, an analysis of responses suggests that participants identified a boundary corresponding to a discourse level (such as when a new theme is established). The results suggest that visual markers (to these boundaries at least) are informative in the absence of cues that can only be perceived by native users of a language (such as cues deriving from lexical and grammatical information). Following presentation of results, directions for future research in this area are suggested.
48
Front, Sonia. "Transgressing boundaries in Jeanette Winterson's fiction." Frankfurt, M. Berlin Bern Bruxelles New York, NY Oxford Wien Lang, 2007. http://d-nb.info/998697648/04.
Full text
49
Hurtig, Tomas. "Plasma cloud penetration across magnetic boundaries." Doctoral thesis, KTH, Alfvén Laboratory, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3804.
Full text
50
Moorman, Taylor Leigh. "Blurring boundaries: pleasures of popular romance." Thesis, Montana State University, 2011. http://etd.lib.montana.edu/etd/2011/moorman/MoormanT0511.pdf.
Full textAbstract:
Immersed in the fantasy worlds of fairy tales and popular romance novels, this project explores the experience of reading for pleasure. Using the fairy tale, "Beauty and the Beast" as well as its retelling in popular romance format in Linda Jones' Debuty and the Beast, my work explores the tension and enjoyment of being a reader of romance while simultaneously internalizing the literary hierarchy that can relegate pleasure to the bottom of the value system. Ultimately, this thesis seeks out the places and times between the concrete, the literary seams amidst the defined limitations of what we think we know, and reexamines the value of pleasure and play for readers of the romance genre.