cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Closing the carbon loop in sugarcane bioethanol : effects of filtercake biochar amendment on soil quality, leaching and carbon utilization
Creators: name: Eykelbosh, Angela Joy
Publisher: name: University of British Columbia
Year: 2014

description: Commodity prices and rural development in Brazil are driving the rapid conversion of the Cerrado biome, a highly diverse ecosystem with nutrient-poor soils. The expanding agricultural footprint includes sugarcane for bioethanol production, which boasts one of the highest net energy yields of commercial biofuels. However, energetic assessments fail to consider ecosystem costs, including soil degradation and impacts on water quality through the release of organic effluents. This thesis examined the use of charcoal or biochar made of ‘waste’ biomass (filtercake) as a soil amendment to reduce soil carbon (C) loss and water quality impairment. The effect of biochar on the leaching of a liquid waste with high eutrophication potential, vinasse, was also examined. Soil amendment with filtercake biochar improved soil pH, cation exchange capacity (CEC), nutrient availability (P, K, Mg, Ca, Mg, Fe, Mn, and Zn), and water retention. Amendment with filtercake biochar rather than raw filtercake also greatly decreased CO₂ loss to rapid mineralization. Furthermore, biochar amendment decreased the loss of dissolved organic carbon (DOC) from a cultivated Ferralsol, with or without co-application of vinasse, through preferential retention of larger and more complex, humified DOC species. In contrast, biochar did not attenuate nitrate (NO₃-) leaching. Finally, δ¹³C isotope analyses were used to examine the effect of raw vs. pyrolyzed residues on C turnover in an uncultivated soil, which suggested that whereas raw filtercake appeared to be mineralized preferentially over native soil organic carbon (SOC), biochar application appeared to provoke mineralization of native SOC. Overall, this project suggest that filtercake biochar may represent a valuable opportunity to better manage solid and liquid organic agricultural wastes in bioethanol production, with the potential to close nutrient loops and improve soil quality. However, further work is required to better understand the effect of filtercake biochar on soil C turnover and its long-term stability.
MPEC 2023-X06 : 2021 NV
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Langzeitergebnisse nach bimanueller Phakoemulsifikation und Implantation der Linse Acri.Smart 48S-5®
Creators: name: Schäferhoff, Christian
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2009
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 617.7
subject: 615

description: Einleitung: Die Zugangswege in der modernen Kataraktchirurgie werden immer kleiner. Dafür sind geeignete Linsen notwendig. Die Implantierbarkeit über kleinere Zugänge geht auf Kosten der Linsendicke und kann sich auf die Stabilität der Linse im Kapselsack auswirken. Die erste in Deutschland zugelassene über Parazentesen implantierbare Linse ist die Acri.Smart 48S-5. Ziel dieser Untersuchung war es, die Stabilität der faltbaren hydrophoben Acri.Smart durch Messung der postoperativen Linsenposition zu bestimmen. Zusätzlich wurde die Änderung des kornealen Astigmatismus nach bimanueller Phakoemulsifikation untersucht. Methode: Die Untersuchung von 15 Patienten erfolgte 6 Monate, 1 Jahr und 3 Jahre nach bimanueller Phakoemulsifikation und Implantation einer Acri.Smart 48S-5. Die Zentrierung der Linse wurde mittels Retroillumineszenzaufnahmen gemessen. Eine mögliche Verkippung der Linse wurde mittels Scheimpflug-Aufnahmen bestimmt. Die ermittelten Werte wurden mit durch Aberrometrie bestimmten Coma-Werten verglichen. Die Bestimmung der Keratometerwerte erfolgte mit dem IOL-Master und dem Topcon Keratometer. Ergebnisse: In allen Fällen konnte keine wesentliche Dezentrierung in den verschiedenen Ebenen gemessen werden. Es kam zu keiner statistisch relevanten Änderung des kornealen Astigmatismus. Eine Korrelation zwischen Coma und Linsenverkippung konnte nicht sicher nachgewiesen werden. Schlussfolgerungen: Die hydrophobe Acri.Smart 48S-5 weist eine stabile Lage und Zentrierung im Kapselsack auf und ist daher für die Implantation als intraokulare Korrektur nach Phakoemulsifikation über Parazentesen geeignet. Mit der Mikroinzisionstechnik kann die postoperative Änderung des kornealen Astigmatismus weiter verringert werden.
Educational outcomes in secondary schools in Bologna
Creators: name: Borgia, Maria Serena
name: Pasquini, Lucia
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: SECS-S/01 Statistica
SECS-S/03 Statistica economica

description: In recent years the analysis of educational outcomes has become increasingly important due mainly to the importance of success at school and the role of the modern school, where students are trained on how to make inroads and work towards planning their lives. In keeping with law no 144/1999, the Province of Bologna local authority collects data on student individuals of compulsory schooling age. This survey represents a complete coverage of the territory. The aim of this study is to use the data on individuals to explain the educational outcomes of these students. We have analysed the data on 5,944 students who were born in 1988 and who attended secondary schools in the province of Bologna in one or more of the five school years from 2002/03 to 2006/07. At first we calculated the success probabilities by gender and institute; later, in order to determine and quantify the influence of students' individual characteristics on final outcomes we estimated five logistic regressions, one for each school year and class attended. Our models confirm the exploratory analysis: variables such as gender, citizenship and the type of school attended do affect educational outcomes.
Towards an identification of the authorial style of Grazia Deledda. A corpus-assisted study
Creators: name: Johnson, Jane Helen
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: L-LIN/12 Lingua e traduzione - Lingua inglese

description: Nell’ambito della linguistica dei corpora, diversi studiosi si sono concentrati sull’importanza di sequenze di parole piuttosto che sull’osservazione di parole singole nell’analisi di elementi stilistici di opere letterarie (Starcke, 2007; Stubbs, 2005; Mahlberg, 2007°, ecc.), in seguito alla ricerca di Hoover (2002). Secondo il linguista, infatti, “[…] le analisi delle frequenze di sequenze di parole frequenti hanno maggior successo rispetto alle analisi delle frequenze di parole frequenti nella corretta attribuzione di testi ai loro autori” (2002: 158). Criteri simili sono stati applicati anche alle traduzioni di opere letterarie (Mahlberg, 2007b). 
Facendo riferimento ad un corpus appositamente creato e composto di 16 romanzi di Grazia Deledda, questo articolo presenta i risultati di un’analisi stilistica dell’autrice sarda. Con lo scopo di evidenziare elementi di stile autoriale, le sequenze di parole più frequenti sono state estratte tramite il confronto del corpus Deledda con un corpus di riferimento.
Con riferimento costante alle concordances nel co-testo, le varie sequenze sono state raggruppate secondo il campo semantico. Una prima analisi quantitativa ha dimostrato una particolare frequenza di frasi contenenti Processi mentali (Halliday 1984, 1995), congiuntivi, riferimenti a parti del corpo e al paesaggio. 
L’autrice poi sottopone ad un’analisi qualitativa diverse frasi chiave che si sono rivelate particolarmente frequenti (Leech e Short 1981), passando così dal testo e dalla stilistica dei corpora al romanzo ed al significato letterario. 
Data la scarsità di linee guida pratiche per traduttori letterari, la metodologia applicata in questo articolo potrebbe rivelarsi utile anche in un’ottica di preparazione alla traduzione di un testo letterario.
Die A. radialis als Zugangsweg für perkutane koronare Interventionen
Creators: name: Kratzsch, Marko
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2009
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 617.41
subject: 617

description: Einleitung: Zahlreiche Daten zeigen Vorteile der A. radialis (Rad) gegenüber der A. femoralis (Fem) als Gefäßzugang für perkutane Koronarinterventionen (PCI). Dennoch wird die Rad bundesweit in weniger als 10% der PCI verwendet. Hier werden die Erfahrungen mit der Rad als primärer Zugangsweg für die PCI in der täglichen Routine eines Katheterlabors in einem Krankenhaus der Regelversorgung beschrieben. Patienten und Methoden: Von Januar 2001 bis Dezember 2002 erhielten insgesamt 556 Patienten eine PCI. Bei allen Patienten, die einen normalen Allen-Test aufwiesen und die nicht an einer dialysepflichtigen Niereninsuffizienz litten, wurde die PCI primär über die Rad durchgeführt. Ergebnisse: Dies waren 472 Patienten, von denen bei 12 Patienten (2,5%) während der PCI auf die Fem gewechselt werden mußte, so dass bei 460 Patienten die PCI über die Rad vollendet wure. Alter, Geschlechterverteilung, Risikofaktoren, Indikationsstellung, Größe und Anzahl der Führungskatheter und Stents, Kontrastmittelverbrauch und Durchleuchtungszeit zeigten keine Unterschiede zwischen Rad und Fem. Die über die Fem behandelten Patienten wiesen eine höhere Morbidität, einen geringeren Eingriffserfolg und eine höhere Komplikationsrate auf, 4 der über die Fem behandelten Patienten verstarben innerhalb von 36h nach der PCI. 230 der 556 Patienten hatten bereits eine vorausgegangene PCI über den jeweils anderen Gefäßzugang erhalten: davon würden 153 Patienten (64,5%) für eine weitere PCI die Rad bevorzugen, 16 Patienten (6,8%) die Fem und 68 Patienten (28,7%) hatten keine Präferenz. Schlußfolgerungen: Die Rad eignet sich als primärer Zugang für die PCI. Sie hat darüberhinaus eine hohe Akzeptanz bei den Patienten.
Quantum phase transitions in the Kondo-necklace model: Perturbative continuous unitary transformation approach
Creators: name: Hemmatiyan, S.
name: Movassagh, M. Rahimi
name: Ghassemi, N.
name: Kargarian, M.
name: Rezakhani, A. T.
name: Langari, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Kondo-necklace model can describe magnetic low-energy limit of strongly correlated heavy fermion materials. There exist multiple energy scales in this model corresponding to each phase of the system. Here, we study quantum phase transition between the Kondo-singlet phase and the antiferromagnetic long-range ordered phase, and show the effect of anisotropies in terms of quantum information properties and vanishing energy gap. We employ the "perturbative continuous unitary transformations" approach to calculate the energy gap and spin-spin correlations for the model in the thermodynamic limit of one, two, and three spatial dimensions as well as for spin ladders. In particular, we show that the method, although being perturbative, can predict the expected quantum critical point, where the gap of low-energy spectrum vanishes, which is in good agreement with results of other numerical and Green's function analyses. In addition, we employ concurrence, a bipartite entanglement measure, to study the criticality of the model. Absence of singularities in the derivative of concurrence in two and three dimensions in the Kondo-necklace model shows that this model features multipartite entanglement. We also discuss crossover from the one-dimensional to the two-dimensional model via the ladder structure.
description: 12 pages, 6 figures
MPEC 2023-X07 : 2021 VV1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Hilbert Schemes and Toric Degenerations for Low Degree Fano Threefolds
Creators: name: Christophersen, Jan Arthur
name: Ilten, Nathan Owen
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J45, 13F55, 14D15, 14M25

description: For fixed degree $d\leq 12$, we study the Hilbert scheme of degree $d$ smooth Fano threefolds in their anticanonical embeddings. We use this to classify all possible degenerations of these varieties to toric Fano varieties with at most canonical Gorenstein singularities.
description: 24 pages, 2 figures; v2 simplified exposition by using rolling factors format where applicable; v3 further revisions to exposition, changed title
Computing symmetric rank for symmetric tensors.
Creators: name: Bernardi, Alessandra
name: Gimigliano, Alessandro
name: Idà, Monica
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: MAT/03 Geometria

description: We consider the problem of determining the symmetric tensor rank for symmetric tensors with an algebraic geometry approach. We give algorithms for computing the symmetric rank for $2\times \cdots \times 2$ tensors and for tensors of small border rank. From a geometric point of view, we describe the symmetric rank strata for some secant varieties of Veronese varieties.
MPEC 2023-X08 : 2021 VF2
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
MPEC 2023-X09 : 2021 VG19
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
title: Finding a church : reasons people give for joining and moving from churches
Creators: name: Wakefield, Gavin
Publisher: name: University of Kent
Year: 1998

description: This thesis investigates the levels of types of church growth in England in recent years, especially in the church of England, with a view to assessing the value of church planting as a strategy for increasing church attendance. In order to do this, it was first established that church plants do have a strong tendency to grow. Because there were no published data on the rates of different types of church growth it was then necessary to produce some base line figures, especially on transfer growth rates. The level of transfer growth was found to be about 50% of all growth in church attendance, slightly lower when assessed by leaders, slighty higher when assessed by church attenders themselves. Individual churches were then studied, some by using data supplied by church leaders, others in more detail by questionnaires filled in by people attending those churches. The key conclusion was that the church plants studied have not grown disproportionately by overall transfer growth, but that they have tended to attract more people from other denominations, which makes the transfer growth more noticeable. Their increases in attendance do therefore mean that church attendance has been higher than it would have been without church planting. Besides providing statistics on the levels of church growth in Wakefield survey enabled the reasons for joining and leaving churches to be studied. It was found that people moving house tended to look for the nearest church, usually of the same denomination; people dissatisfied with an existing church were more concerned about worship, and were much more likely to change denomination; people attending for the first time also looked for the nearest church where they found it to be friendly. In qualitative interviews all groups spoke of worship and of the importance of good personal contact, but it was the relative order of importance that varies. These results showed that people finding churches had similar reasons to people finding faith. Comparison with previously ignored research from the 1940's showed that these reasons had persisted for at least the last 50 years in England.
title: Elevated temperature measurements during a hypervelocity impact process
Creators: name: Tsembelis, Kostantinos
Publisher: name: University of Kent
Year: 2021

description: Experiments have been performed using the 2 MV Van de Graaff dust accelerator facility of the University of Kent at Canterbury. Iron dust particles were accelerated towards a glass target. Velocities in the range 5-20km s\(^{-1}\) were attained for particles of mass 10\(^{-17}\)-10\(^{-14}\)kg. Intensity of the resulting light flash was then measured for two different wavelengths and the temperature of the ejecta cloud was found assuming black body emission. Experimental results were compared against one dimensional predictions based on equilibrium thermodynamics. A mie-Gruneisen equation of state was assumed for the glass target. Shock state and subsequent release gave an estimation for the temperature. Finally, a simple model was constructed to simulate glass hypervelocity impacts with the use of hydrocodes. Although numerical and computational deficiencies limited the use of hydrocodes to predict ejecta cloud temperatures, it was possible to use the mode to estimate the dimensions of the impact craters on glass and compare them with published data.
A note on new measures of agglomeration and specialization
Creators: name: Franceschi, Francesco
name: Mussoni, Maurizio
name: Pelloni, Gianluigi
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: SECS-P/01 Economia politica

description: Most measures and indexes of industrial agglomeration, concentration and specialization are variations of the Gini's index and may be limited in scope and structure. Rarely, if ever, they include any reference to territorial dimensions and tend to be measures of volumes adjusted for
the task at end. They do not embody any information relative to the industrial density and size of the analyzed regions. Alternatively some authors use just density as a measure of agglomeration ignoring the related dimensionalities of volume and territorial size. These shortcomings may bring about both di¢ culties in interpreting results and distorted pictures about the actual industrial regional structure of an area.
Regional dimensionality is particularly relevant for researchers focusing on analytical aspects connected with agglomeration and concentration. The present paper introduces measures of agglomeration, concentration and specialization encompassing information about volume, den-
sity and region dimensionality. Such an index is built on simple heuristic notion of industrial mass and would provide a more reliable, accurate and fexible instrument than previous measures.

JEL Classifcation: C22, C32, C50, E24, E32, J63.
Parton Orbital Angular Momentum and Final State Interactions
Creators: name: Burkardt, Matthias
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Definitions of orbital angular momentum based on Wigner distributions are used as a framework to discuss the connection between the Ji definition of the quark orbital angular momentum and that of Jaffe and Manohar.We find that the difference between these two definitions can be interpreted as the change in the quark orbital angular momentum as it leaves the target in a DIS experiment. The mechanism responsible for that change is similar to the mechanism that causes transverse single-spin asymmetries in semi-inclusive deep-inelastic scattering.
description: 6 pages, 2 figures, version to appear in PRD
title: Weight reduction of DC/DC converters using controllable inductors
Creators: name: Eichhorst, Dennis
name: Pfeiffer, Jonas
name: Zacharias, Peter
Publisher: name: Universität Kassel
Year: 2019
Subjects: subject: 620
subject: Konverter
subject: Gleichstrom
subject: Induktor

description: Beitrag zur Konferenz "PCIM Europe 2019 : International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management", 7.-9. Mai 2019 in Nürnberg.
description: Parts of the work presented in this paper have been supported by the BMBF (German Federal Ministry of Education and Research). Project funding reference number: 16EMO0234
An extension of Kesten's criterion for amenability to topological Markov chains
Creators: name: Stadlbauer, Manuel
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 37A50, 37C30, 20F69

description: The main results of this note extend a theorem of Kesten for symmetric random walks on discrete groups to group extensions of topological Markov chains. In contrast to the result in probability theory, there is a notable asymmetry in the assumptions on the base. That is, it turns out that, under very mild assumptions on the continuity and symmetry of the associated potential, amenability of the group implies that the Gurevic-pressures of the extension and the base coincide whereas the converse holds true if the potential is Hölder continuous and the topological Markov chain has big images and preimages. Finally, an application to periodic hyperbolic manifolds is given.
description: New proof of Lemma 5.3 due to the gap in the first version of the article
title: Experimental and computational study of hypervelocity impact on brittle materials and composites
Creators: name: Taylor, Emma Ariane
Publisher: name: University of Kent
Year: 2021

description: Retrieval and analysis of space-exposed surfaces from Low Earth Orbit (LEO) can lead to an improved understanding of the space debris and micrometeoroid particulate environment. A large volume of data has been accumulated from analysis of space-exposed ductile materials, including the LDEF satellite. The Hubble Space Telescope (HST) and EURECA solar arrays provide a large, new source of information on the LEO particulate flux. Below a certain crater diameter, these solar arrays are equivalent to semi-infinite brittle material targets and thus the impact crater fluxes are analogous to impact fluxes on returned lunar rocks and Apollo/Gemini windows. An extensive shot programme has been executed onto glass, aluminium and spacecraft honeycomb (used as exterior spacecraft wall and solar array support structure). The data supplement the large database of brittle material hypervelocity impact tests used in this thesis. These data have been used to (i) develop new, target-dependent, empirically-determined brittle material damage equations, (ii) derive a conversion factor between the brittle material ,) conchoidal diameter( D, and the ballistic limit in aluminium for a particular exposure and shielding history (Fmax)a, nd (iii) investigatet he ballistic limit of spacecrafth oneycomb. In addition, the response of brittle materials to, hypervelocity impact has been explored via hydrocode modelling, including the implementation and validation of the Johnson-Holmquist brittle material model at velocities beyond the experimental calibration regime. The converted semi-infinite brittle material fluxes from the HST and EURECA solar arrays have been directly compared with both an experimentally-measured LDEF mean flux and a modelled flux prediction for meteoroids (excluding space debris). The solar array fluxes are in good agreement with the LDEF data and modelling results for F. greater than 20-30 μm. Below this value of F,,,, the data do not reproduce the space debris flux enhancement shown by LDEF.
Direct and indirect effects of drought on community structure and ecosystem processes in an aquatic ecosystem
Creators: name: Amundrud, Sarah Louise
Publisher: name: University of British Columbia
Year: 2014

description: A major challenge of ecologists is to discover general mechanisms that explain how climate shapes ecological communities and ecosystems. Efforts have traditionally focused on direct effects, but a growing body of evidence suggests that indirect effects of climate, via altering species interactions, may be more important. Predators are often particularly vulnerable to environmental stress, thus effects of climate may cascade through ecosystems by altering top-down trophic interactions. In Costa Rica, where climate change is predicted to decrease the amount of precipitation, bromeliads contain aquatic insect food-webs largely controlled by the top predator, damselfly nymphs. Community composition varies with bromeliad size. Notably, top predators occur only in large bromeliads, possibly because the probability of drought stress decreases with bromeliad size. Thus, bromeliads are ideal systems to study the relative importance of direct and indirect effects of climate on community and ecosystem responses. To determine whether climate governs community composition directly, I regressed insect drought sensitivity, which I obtained experimentally, against insect habitat size sensitivity, which I calculated from observational data. To examine the importance of indirect drought effects from altered trophic interactions, I experimentally manipulated trophic composition and drought in mesocosms mimicking a single bromeliad leaf well and measured changes in community composition, decomposition, and water quality. Climate directly governed community composition at the scale of the bromeliad, as drought sensitivity strongly predicted habitat size sensitivity. At the scale of the leaf well, drought altered community composition and ecosystem properties indirectly by reducing top-down control from the top predator. Moreover, indirect effects of drought cascaded through the food-web to affect ecosystem functioning (decomposition) and state (water quality). These findings suggest that in complex habitats, such as bromeliads, direct (physiological) effects of climate may sufficiently explain community composition. However, in isolated habitats, such as a single leaf well in which dispersal is hindered, indirect effects of climate, via altered trophic interactions, may emerge and cascade through the ecosystem. The relative importance of direct and indirect effects of climate may thus depend on habitat scale.
Untersuchungen zur Anwendung navigationsgestützter Nasennebenhöhlenchirurgie an der Klinik für Hals-, Nasen- und Ohrenheilkunde, Kopf- und Halschirurgie des Universitätsklinikums Halle (Saale) im Zeitraum 2003 - 2008
Creators: name: Klíma, Manuela
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2010
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 617

description: Die endonasale, optisch kontrollierte und an der Physiologie der Nasennebenhöhlen (NNH) orientierte Chirurgie gilt als Goldstandard für die operative Therapie der chronischen Rhinosinusitis (CRS). Die Nähe des interindividuell variierenden und partiell durch Voroperationen veränderten NNH-Systems zu lebenswichtigen Strukturen trieb in den letzten 20 Jahren die Entwicklung von intraoperativen Navigationssystemen voran. Computerassistierte Chirurgie soll die räumliche Orientierung in komplizierten Situationen erleichtern und die intraoperative Sicherheit erhöhen. Die vorliegende Untersuchung hat die Evaluierung der Erfahrungen mit der Anwendung eines optischen Navigationssystems (Stealth® Station TREON, Firma Medtronic) bei 89 endonasalen mikroskopisch-endoskopischen NNHOperationen bei Patienten mit CRS an der Klinik für Hals-, Nasen- und Ohrenheilkunde, Kopf- und Halschirurgie des Universitätsklinikums Halle (Saale) in dem Zeitraum 12/2005-02/2008 zum Ziel. Zum Vergleich wurden die Daten von 104 endonasalen mikroskopischendoskopischen NNH-Eingriffen bei Patienten mit CRS vor der Implementierung des Navigationssystems zwischen 01/2003-06/2005 retrospektiv ausgewertet. Bei den navigationsgestützt-durchgeführten NNH-Eingriffen betrug die durchschnittliche OP-Dauer 112 min, bei NNH-Eingriffen ohne Navigation 90 min. Die durchschnittliche Registrierzeit lag bei 8,8 min. In 87,5% der Operationen mit Navigationsunterstützung wurde die intraoperative Genauigkeit mit C 2 mm angegeben. In 62% der Fälle erfolgte eine komplikationslose Navigation. Die Major-Komplikationsrate bei navigationsgestützt-durchgeführten Eingriffen war mit 5,6% tendentiell niedriger zu eruieren als bei NNH-Operationen ohne Navigation mit 7,7%. Die Minor-Komplikationsraten sind annähernd gleich anzugeben. Die in dieser Untersuchung gewonnenen Erfahrungen mit der Anwendung eines Navigationssystems bestätigen eine zuverlässige Navigation und sind vergleichbar mit anderen Publikationen. Problematisch ist die fehlende Standardisierung der Vor- und Nachteile zum Vergleich verschiedener Navigationssysteme sowie das Fehlen von randomisierten multizentrischen Studien zur Erfassung der Effizienz und Sicherheit von Navigationssystemen.Navigationssysteme erleichtern Anfängern den Einstieg in die NNH-Chirurgie, stellen aber keinen Ersatz für einen operativen Lernprozess dar.
title: Hegemony and urban space : the case of the Turkish capital Ankara
Creators: name: Sengul, Huseyin Tarik
Publisher: name: University of Kent
Year: 2021

description: Cities are social products resulting from conflicting interests. Urban space is produced, reproduced and transformed through the action of interest-driven human agency who strive for different outcomes. Some see urban space as a living place, whereas some others perceive it as a source of speculative gaining or use it as an arena of representation for a particular identity. While actors change urban space with their strategies, schemes and projects, they do so always under a specific structural context. In this respect, the relationship between strategy and structure stands as one of the basic problems of urban social and political analysis. The thesis develops a strategic relational approach to the state and the urban question which overcomes some of the difficulties of the structure-agency nexus, and applies it to the study of first the Turkish state, and then to the analysis of its capital Ankara. Having shown that the dominant, state-centered perspectives in Turkey analyses the state and the urban question around a misleading duality, such as the élite versus the masses and the state versus civil society, it is argued that a relational understanding of the state and the urban question which overcomes the dualities, between the society and the state, is the more productive. A study of the Turkish state and its capital Ankara is hardly possible without referring to the Kemalist project. For this reason, the Kemalist project is placed at the centre of analysis and argued that Kemalism needs to be seen as a bourgeois revolution with nation state formation as its most distinctive aspect. Having shown that the Kemalist project denied the real communities that were a part of Ottoman tradition, in favour of an imagined community which was thought to be Western-looking, secular and modern, it is revealed that the most important spatial dimension of this denial was the rejection of the Imperial capital, Istanbul, in favour of a small Anatolian town, Ankara. As a symbol, arena and means of this transformation, Ankara exhibited all the contradictions of this refusal in the form of a duality between the old town inherited from the Ottoman period, and the new town which was built by the Republican regime. The duality took a new form and gained new dimensions after the Second World War with the massive population influx into the city from the rural areas, as the emerging squatters at the outskirts of the city outnumbered the established population of the city in a short space of time. This case study of Ankara dwelled upon the view that although the cultural and identity dimensions, which are the central concerns of the mainstream literature, are important ones in the understanding of the development of the city, economic and material interests are central to an exhaustive understanding of the socio-spatial change the city underwent, as Ankara has not been only a capital but also a capitalist city where exchange value overrides other forms of value.
Diffusions with rank-based characteristics and values in the nonnegative quadrant
Creators: name: Ichiba, Tomoyuki
name: Karatzas, Ioannis
name: Prokaj, Vilmos
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We construct diffusions with values in the nonnegative orthant, normal reflection along each of the axes, and two pairs of local drift/variance characteristics assigned according to rank; one of the variances is allowed to vanish, but not both. The construction involves solving a system of coupled Skorokhod reflection equations, then ``unfolding'' the Skorokhod reflection of a suitable semimartingale in the manner of Prokaj (Statist. Probab. Lett. 79 (2009) 534-536). Questions of pathwise uniqueness and strength are also addressed, for systems of stochastic differential equations with reflection that realize these diffusions. When the variance of the laggard is at least as large as that of the leader, it is shown that the corner of the quadrant is never visited.
description: Published in at http://dx.doi.org/10.3150/12-BEJ459 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Viaggiatori e viaggiatrici. Letture storico-geografiche
Creators: name: Marchi, Marzia
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: M-GGR/01 Geografia

description: Il viaggio- una  pratica sociale profondamente mutata in Europa dai pellegrinaggi medievali fino ai turismi contemporanei- è qui indagato attraverso letture sul ruolo di alcuni fra i molti protagonisti, che hanno innovato le modalità di viaggiare e proposto diverse visioni sul mondo esterno. In particolare si dà conto del contributo di alcune figure femminili alla difficile conquista della libertà di viaggiare da parte delle donne europee, ed inoltre della più recente valorizzazione di altri viaggiatori non europei, che si sono cimentati, nei secoli scorsi, in lunghi itinerari attorno al mondo.
Einflussfaktoren auf das Dimensionsverhalten von Prothesenbasiskunststoffen bei der Polymerisation
Creators: name: Peters, Andreas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2010
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 617

description: Das Polymethylmethacrylat (PMMA) ist der weltweit am häufigsten verwendete Prothesenbasiskunststoff. Für die Verarbeitung dieses Kunststoffes mit verschiedenen Polymerisationstypen stehen unterschiedliche Technologien zur Verfügung. Bei der herstellerkonformen Polymerisation des Kunststoffes kommt es im Vergleich zum Meistermodell regelmäßig zu einer materialbedingten Dimensionsänderung der Prothese. Ziel dieser Studie war die Überprüfung des Dimensionsverhaltens moderner Prothesenbasiskunststoffe nach Polymerisation, Wässerung und Nachpolymerisation in Abhängigkeit vom Polymerisationstyp und der Verarbeitungstechnologie. An den prothesenähnlichen Probekörpern erfolgte die Bestimmung des dorsalen Randspalts sowie des Transversalmaßes. Die Ergebnisse zeigen, dass die höchste Dimensionsstabilität nach dem Herstellungsprozess durch das mit pneumatischer Injektion hergestellte Kaltpolymerisat erzielt wurde. Die 24-stündige Wasserlagerung führte bei keinem Kunststoff zu einer signifikanten Änderung der dorsalen Dimension. Im Zuge der Nachpolymerisation zeigte das mit pneumatischer Injektion hergestellte Heißpolymerisat die geringsten Abweichungen zur Urprothese. Hinsichtlich der untersuchten Teilaspekte kann keine generelle Empfehlung zu einem Polymerisationstyp oder einem Verarbeitungsverfahren getroffen werden.
title: The role of the hospital in medieval Kent, c.1080-c.1560
Creators: name: Sweetinburgh, Sheila
Publisher: name: University of Kent
Year: 2021

description: This thesis examines the social history of the medieval hospital in Kent by investigating its role and place within provincial society. The method used was an analysis of the hospital's participation in the systems of exchange and reciprocity involved in the spiritual economy to assess its relative importance as a charitable and religious institution. Chapter 1 provided a context for the study, including a chronology of the hospitals in Kent from the Conquest to the Reformation and thematic section on function, organisation, resources and inmates for the same period using evidence from Kent's hospitals. The seventh section of this chapter comprised a summary of the value of the use of the concept of reciprocalexchange and its application to four hospital models (based on function) over time through an investigation of four types of reciprocal exchange: foundation grants, in vitam grants, testamentary bequests, casual alms. Also explored in brief were the range of participants in the spiritual economy and certain aspects relating to the relationship between various hospitals in Kent and their patrons and benefactors through the use of three chronological sections: early thirteenth century, mid fourteenth century, late medieval period (c.1470-c.1530). The last two chapters are case studies of the hospitals in the two Cinq Ports of Sandwich and Dover so providing a detailed, systematic analysis of the roles of the various hospitals there through their involvement and that of others, both inside and outside the town, in reciprocal exchange. From these findings it is suggested that the hospital in Kent was a minor participant in the spiritual economy, but that its role therein was likely to be multifarious, though probably changeable over time. In addition for certain hospitals their political, economic and/or social rules provided them with a degree of relevance for the local townspeople, and at times this was also valid in terms of the region and the nation.
Der prädiktive Wert der intraoperativen PTH-Messung für die frühpostoperative Hypokalzämie nach Schilddrüsenoperationen
Creators: name: Manthey, Andreas
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2010
Subjects: subject: Online-Publikation
subject: Hochschulschrift
subject: 617

description: Um den prädiktiven Wert der intraoperativen Parathormonbestimmung für das Auftreten eines frühpostoperativen Hypoparathyreoidismus zu ermitteln wurden bei 245 an der Schilddrüse operierten Patienten die Parathormonspiegel 10 Minuten nach Beendigung der Manipulationen an den Nebenschilddrüsen bestimmt. Es ließ sich ein signifikanter Zusammenhang zwischen dem intraoperativen Parathormonspiegel und dem postoperativen Kalziumwert sowie zwischen intraoperativen Parathormonspiegeln und dem Auftreten von postoperativen Hypokalzämiesymptomen nachweisen. Für den absoluten intraoperativen PTH-Wert und den PTH-Abfall wurden durch ROC-Analyse Grenzwerte bestimmt, bei denen mit hoher Sensitivität und Spezifität die Vorhersage einer symptomatischen Hypokalzämie und eines Kalziumabfalls unter 1,8 mmol/l möglich ist. Durch die Ermittlung des prädiktiven Wertes für die einzelnen Parathormonspiegel und für den intraoperativen PTH-Abfall konnte das Risiko der frühpostoperativen Hypokalzämie bestimmt werden. Dieses lag für eine symptomatische Hypokalzämie unter 5 % bei intraoperativen PTH-Werten > 8 ng/l bzw. einem Abfall des PTH nicht unter 25 % des Ausgangswertes. Die intraoperative Parathormonbestimmung ist somit ein geeignetes Verfahren, um zu einem frühen Zeitpunkt mit sehr hoher Wahrscheinlichkeit eine frühpostoperative symptomatische Hypokalzämie bzw. einen starken Abfall des Serumkalziumspiegels nach Schilddrüsenoperation vorhersagen zu können.
title: The socio-legal status of Bangali women in Bangladesh : implications for development.
Creators: name: Rahman, Saira
Publisher: name: University of Kent
Year: 2021

description: There have been specific studies on Bangladeshi women in the past, which have dealth with either the empowerment of rural women, Muslim women or women in the industrial sector. In order to determine the socio-legal position of Bangali women in Bangladesh, it has been necessary to identify and discuss different social and legal issues pertinent to the topic. This study is, therefore, not a selective one, but a broad-based analysis of the position of women in Bangladesh in the eyes of the social and legal system of the country. The thesis deals with the 'socio-legal status' of Bangali women. Many may deem that using the term 'status' is degrading to women, as it conjures up the idea of measuring women to a male yardstick where women become dehumanised. However, this thesis has no intention of dehumanising women. The term 'status' has been used to determine women's position in the social and legal system in Bangladesh to date, and refers to women's access to legal, educational and 'public' resources and their decision making power within the household and larger society and what social and legal cosntraints they have to overcome. The women of Bangladesh have always been dominated by a patriarchal society, reluctant to shed its traditions and customs which have denied women actual participation in political and social decision-making. This attitude is reflected in some of the laws prevalent in the country and in the lack of implementation of laws enacted to protect women. It is, however, not only patriarchy which is stifling women in Bangladesh, but also poverty, which is, in some cases, due to patriarchal ideas. One example of this is the fact that women-headed households rate among the 'poorest of the poor' in the country, since these women have no male voice or support. Government run poverty alleviation programmes fail to include these households as patriarchal trends consider men to be the main wage-earners of a family. This thesis has attempted to highlight and analyse the reasons why women in Bangladesh are discriminated against by society and in the eyes of the law. It also tries to analyse the reason why, after twenty-seven years of independence, the country is still poverty-stricken, despite the amount of international funds being poured into it to help finance development programmes. It emphasises the fact that to improve women's social, legal and even economic status in the country it is necessary to change the way society regards them.
Coulomb Gas and Sine-Gordon Model in Arbitrary Dimension
Creators: name: Nandori, I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The sine-Gordon (SG), i.e. periodic scalar field theory is known to play an important role in $d=2$ dimensions. A paradigmatic example is the topological phase transition of the vortex dynamics in superfluid films and layered superconductors which are described by SG type models. Periodic scalar potentials find applications in $d=4$ dimensions, too. Higgs, inflaton and axion physics are examples where scalar fields naturally appear, thus, the SG model can be used instead of the usual polynomial one. The SG quantum field theory can be mapped onto the neutral Coulomb-gas (CG) in arbitrary dimension and the renormalization group (RG) study of the d-dimensional CG model was obtained in the dilute gas approximation. It signals a single phase for $d>2$, however, it was shown recently, that a suitable generalization of the SG model can posses a topological phase transitions in $d=4$ dimensions. Our goals in this work are (i) to map out the phase structure of the (original) SG and the equivalent neutral CG models by the functional RG method in arbitrary dimension, (ii) to compare the 3-dimensional SG and isotropic XY spin models and show that they belong to different universality classes, (iii) to study the consequences of the findings on higgs, inflaton, axion models and on the topological phase transition in higher dimensions.
description: final version, published in NPB, 16 pages, 6 figures
Roles of TMP21 in Alzheimer's disease
Creators: name: Zhang, Xiaojie
Publisher: name: University of British Columbia
Year: 2014

description: Deposition of amyloid β protein (Aβ) to form neuritic plaques in the brain is the unique pathological feature of Alzheimer’s disease (AD). Aβ is derived from the cleavages of amyloid β precursor protein (APP) by β-secretase at Asp-1 site and by γ-secretase. Beta-site APP cleaving enzyme 1 (BACE1) is the β-secretase. It mainly cleaves APP within the Aβ region at the Glu-11 site to generate truncated Aβ species. Twenty-one kilodalton transmembrane trafficking protein, TMP21 (also named TMED10, p23) is a vesicular trafficking protein and a member of p24 family proteins. TMP21 mediates protein endoplasmic reticulum (ER)/Golgi transport and selectively guides the glycosylphosphatidylinositol-anchored proteins into lipid rafts. It is also essential for forming Golgi structural organization. Recent studies show that the downregulation of TMP21 increases Aβ generation by affecting APP trafficking and selectively modulating γ-cleavage on APP. However, the precise roles of TMP21 in AD pathogenesis remain unknown. In this thesis, we reported the discovery of a novel AD-associated single nucleotide polymorphism (SNP) in the intron 4 of Tmp21. This SNP significantly increases TMP21 transcript splicing efficiency in vitro, resulting in upregulation of TMP21 gene expression. Furthermore, we found that overexpression of TMP21 shifts APP processing from the non-amyloidogenic to the amyloidogenic pathway by specifically increasing the BACE1 activity at Asp-1 site. Downregulation of TMP21 also facilitates amyloidogenic cleavage. The interaction between TMP21 and BACE1 is essential for BACE1’s ER export, and TMP21 enhances APP/BACE1 co-residency and might guide both APP and immature BACE1 in lipid rafts-like structures. In summary, this study defined the roles of TMP21 in AD pathogenesis. It demonstrated for the first time the genetic association between TMP21 and AD. The study also found that TMP21 facilitates APP amyloidogenic processing by modulating BACE1 maturation and trafficking, leading to increased BACE1 cleavage at Asp-1 site to generate Aβ. Therefore, interrupting the interaction between TMP21 and BACE1 to reduce Aβ production could be potential strategy to develop drugs for treating AD.