cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Investigating the physiological role of PYY-expressing cells in the gut and pancreas
Creators: name: Sam, Seyed Amir H.
Publisher: name: Imperial College London
Year: 2011

description: Peptide YY (PYY) is a hormone produced by the enteroendocrine L cells in the gut. It is also expressed in the pancreatic islets and brainstem. PYY is secreted from the L cells in proportion to caloric intake and is involved in the regulation of satiety and energy homeostasis. The physiological role of PYY in the pancreatic islets and brainstem is not clear. In order to investigate the physiological role of PYY-expressing cells, I used a transgenic mouse model in which diphtheria toxin receptor (DTR) is expressed downstream of the PYY promoter. This enabled ablation of the PYY-expressing cells following administration of diphtheria toxin (DT) in adult mice. Intraperitoneal administration of DT at a dose of 40ng/g resulted in a significant loss of colonic, pancreatic and brainstem PYY (> 95%). Interestingly, ablation of PYY-expressing cells resulted in a significant loss of pancreatic insulin and hence severe hyperglycaemia in adult mice. In vitro administration of DT in cultured islets resulted in a significant dose-dependent loss of insulin, PYY and glucagon content. Immunohistochemical distribution of DTR was shown to be limited to the periphery of the islet, where PYY is also expressed. These experiments suggest that a product of the PYY-expressing cells may provide a paracrine factor essential for beta cell viability. Replacement of PYY using twice-daily subcutaneous injection of a long-acting PYY analogue (X-PYY) prevented the development of diabetes and reduced the loss of pancreatic insulin content. Administration of the analogue also reduced insulin loss in streptozotocin-treated mice. These studies suggest that PYY may be an important signal for beta cell maintenance. These findings have important implications for identifying novel therapies for prevention of beta cell loss in diabetes mellitus.
Institute of Archaeology and Anthropology, University of South Carolina Site Survey Record 38BK2701
Creators: name: Fernandez, Rachel
Publisher: name: South Carolina Institute of Archaeology and Anthropology
Year: 2015
Subjects: North Air Force Auxiliary Field
Berkeley (County)
Orangeburg (County)
South Carolina (State / Territory)
Charles (County)
Prehistoric
Early Woodland
Middle Woodland
Late Woodland
38BK2701
Ceramic Scatter
Ceramic
Site Survey Records
Site Form
Archaeological Overview
Reconnaissance / Survey
Heritage Management
Systematic Survey

description: This document is a site form for site 38BK2701 recorded by the University of South Carolina.
H2 Formation on Interstellar Grains in Different Physical Regimes
Creators: name: Biham, O.
name: Furman, I.
name: Katz, N.
name: Pirronello, V.
name: Vidali, G.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: An analysis of the kinetics of H2 formation on interstellar dust grains is presented using rate equations. It is shown that semi-empirical expressions that appeared in the literature represent two different physical regimes. In particular, it is shown that the expression given by Hollenbach, Werner and Salpeter [ApJ, 163, 165 (1971)] applies when high flux, or high mobility, of H atoms on the surface of a grain, makes it very unlikely that H atoms evaporate before they meet each other and recombine. The expression of Pirronello et al.\ [ApJ, 483, L131 (1997)] -- deduced on the basis of accurate measurements on realistic dust analogue -- applies to the opposite regime (low coverage and low mobility). The implications of this analysis for the understanding of the processes dominating in the Interstellar Medium are discussed.
description: 4 pages, MN style
Electron and proton energization in 3D reconnecting current sheets in semirelativistic plasma with guide magnetic field
Creators: name: Werner, Gregory R.
name: Uzdensky, Dmitri A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Using 3D particle-in-cell simulation, we characterize energy conversion, as a function of guide magnetic field, in a thin current sheet in semirelativistic plasma, with relativistic electrons and subrelativistic protons. There, magnetic reconnection, the drift-kink instability (DKI), and the flux-rope kink instability all compete and interact in their nonlinear stages to convert magnetic energy to plasma energy. We compare fully 3D simulations with 2D in two different planes to isolate reconnection and DKI effects. In zero guide field, these processes yield distinct energy conversion signatures: ions gain more energy than electrons in 2Dxy (reconnection), while the opposite is true in 2Dyz (DKI), and the 3D result falls in between. The flux-rope instability, which occurs only in 3D, allows more magnetic energy to be released than in 2D, but the rate of energy conversion in 3D tends to be lower. Increasing the guide magnetic field strongly suppresses DKI, and in all cases slows and reduces the overall amount of energy conversion; it also favors electron energization through a process by which energy is first stored in the motional electric field of flux ropes before energizing particles. Understanding the evolution of the energy partition thus provides insight into the role of various plasma processes, and is important for modeling radiation from astrophysical sources such as accreting black holes and their jets.
description: 10 pages, 3 figures
Symmetrized Operator Split Schemes for Force and Source Modeling in Cascaded Lattice Boltzmann Methods for Flow and Scalar Transport
Creators: name: Hajabdollahi, Farzaneh
name: Premnath, Kannan N.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Operator split forcing schemes exploiting a symmetrization principle, i.e. Strang splitting, for cascaded lattice Boltzmann (LB) methods in two- and three-dimensions for fluid flows with impressed local forces are presented. Analogous scheme for the passive scalar transport represented by a convection-diffusion equation with a source term in a novel cascaded LB formulation is also derived. They are based on symmetric applications of the split solutions of the changes on the scalar field/fluid momentum due to the sources/forces over half time steps before and after the collision step. The latter step is effectively represented in terms of the post-collision change of moments at zeroth and first orders, respectively, to represent the effect of the sources on the scalar transport and forces on the fluid flow. Such symmetrized operator split cascaded LB schemes are consistent with the second-order Strang splitting and naturally avoid any discrete effects due to forces/sources by appropriately projecting their effects for higher order moments. All the force/source implementation steps are performed only in the moment space and they do not require formulations as extra terms and their additional transformations to the velocity space. These result in particularly simpler and efficient schemes to incorporate forces/sources in the cascaded LB methods unlike those considered previously. Numerical study for various benchmark problems in 2D and 3D for fluid flow problems with body forces and scalar transport with sources demonstrate the validity and accuracy, as well as the second-order convergence rate of the symmetrized operator split forcing/source schemes for the cascaded LB methods.
description: 41 pages, 9 figures
Does light exert Abraham's force in a transparent medium?
Creators: name: Antoci, S.
name: Mihich, L.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Classical Physics (physics.class-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Abraham's force seems to have been observed in very low frequency experiments, but the existence of an Abraham's force exerted by light is still to be proved. Twenty years ago Brevik proposed an experiment for checking what forces light exert in the interior of a transparent medium. It is argued that his proposal is feasible today with a detection method now at hand, thanks to the great improvements achieved in manufacturing optical fibres with the required physical properties.
description: Plain TeX, 12 pages
A Novel Bio-Inspired Insertion Method for Application to Next Generation Percutaneous Surgical Tools
Creators: name: Parittotokkaporn, Tassanai
Publisher: name: Imperial College London
Year: 2011

description: The use of minimally invasive techniques can dramatically improve patient outcome from neurosurgery, with less risk, faster recovery, and better cost effectiveness when compared to conventional surgical intervention. To achieve this, innovative surgical techniques and new surgical instruments have been developed. Nevertheless, the simplest and most common interventional technique for brain surgery is needle insertion for either diagnostic or therapeutic purposes. The work presented in this thesis shows a new approach to needle insertion into soft tissue, focussing on soft tissue-needle interaction by exploiting microtextured topography and the unique mechanism of a reciprocating motion inspired by the ovipositor of certain parasitic wasps. This thesis starts by developing a brain-like phantom which I was shown to have mechanical properties similar to those of neurological tissue during needle insertion. Secondly, a proof-of-concept of the bio-inspired insertion method was undertaken. Based on this finding, the novel method of a multi-part probe able to penetrate a soft substrate by reciprocal motion of each segment is derived. The advantages of the new insertion method were investigated and compared with a conventional needle insertion in terms of needle-tissue interaction. The soft tissue deformation and damage were also measured by exploiting the method of particle image velocimetry. Finally, the thesis proposes the possible clinical application of a biologically-inspired surface topography for deep brain electrode implantation. As an adjunct to this work, the reciprocal insertion method described here fuelled the research into a novel flexible soft tissue probe for percutaneous intervention, which is able to steer along curvilinear trajectories within a compliant medium. Aspects of this multi-disciplinary research effort on steerable robotic surgery are presented, followed by a discussion of the implications of these findings within the context of future work.
Ionic vs. van der Waals Layered Materials: Identification and Comparison of Elastic Anisotropy
Creators: name: McKinney, Robert
name: Gorai, Prashun
name: Manna, Sukriti
name: Toberer, Eric
name: Stevanović, Vladan
Publisher: name: arXiv
Year: 2018
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this work, we expand the set of known layered compounds to include ionic layered materials, which are well known for superconducting, thermoelectric, and battery applications. Focusing on known ternary compounds from the ICSD, we screen for ionic layered structures by expanding upon our previously developed algorithm for identification of van der Waals (vdW) layered structures, thus identifying over 1,500 ionic layered compounds. Since vdW layered structures can be chemically mutated to form ionic layered structures, we have developed a methodology to structurally link binary vdW to ternary ionic layered materials. We perform an in-depth analysis of similarities and differences between these two classes of layered systems and assess the interplay between layer geometry and bond strength with a study of the elastic anisotropy. We observe a rich variety of anisotropic behavior in which the layering direction alone is not a simple predictor of elastic anisotropy. Our results enable discovery of new layered materials through intercalation or de- intercalation of vdW or ionic layered systems, respectively, as well as lay the groundwork for studies of anisotropic transport phenomena such as sound propagation or lattice thermal conductivity.
Amine-Promoted Alkene Aziridination
Creators: name: Pullin, Robert David Charles
Publisher: name: Imperial College London
Year: 2011

description: Aziridines, the smallest saturated aza-heterocycle, are not only prevalent in several natural products, but also represent a versatile synthetic tool for the chemist via exploitation of the strained ring system. Research described in this thesis concerns the chemistry of N-N ylides (aminimines), which were utilised in a novel tertiary amine-promoted organocatalytic approach to the aziridination of α,β-unsaturated carbonyl compounds. Through the use of modified conditions two important classes of substrates, dienones and alpha-enolizable enones, both of which had previously shown poor reactivity with the system, can now be aziridinated in good yields. Studies have also focused on the development of an asymmetric variant of the methodology using chiral tertiary amine promoters. A variety of novel chiral six-membered 1,4-heterocycles and cinchona alkaloid derivatives have been synthesised and their utility towards asymmetric alkene aziridination has been assessed, aiding the understanding of the proposed transition state model for the reaction.
The Role of Temperature in a Dimensional Approach to QCD_3
Creators: name: Ferrando, A.
name: Jaramillo, A.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analyze the role played by temperature in QCD_3 by means of a dimensional interpolating approach. Pure gauge QCD_3 is defined on a strip of finite width L, which acts as an interpolating parameter between two and three dimensions. A two-dimensional effective theory can be constructed for small enough widths giving the same longitudinal physics as QCD_3. Explicit calculations of T-dependent QCD_3 observables can thus be performed. The generation of a deconfinig phase transition, absent in QCD_2, is proven through an exact calculation of the electric or Debye mass at high T. Low and high T behaviors of relevant thermodynamic functions are also worked out. An accurate estimate of the critical temperature is given and its evolution with L is studied in detail.
description: 27 pages, 3 postscript figures. Changes in section 5
Staggered Quantum Walk on Hexagonal Lattices
Creators: name: Chagas, Bruno
name: Portugal, Renato
name: Boettcher, Stefan
name: Segawa, Etsuo
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A discrete-time staggered quantum walk was recently introduced as a generalization that allows to unify other versions, such as the coined and Szegedy's walk. However, it also produces new forms of quantum walks not covered by previous versions. To explore their properties, we study here the staggered walk on a hexagonal lattice. Such a walk is defined using a set of overlapping tessellations that cover the graph edges, and each tessellation is a partition of the node set into cliques. The hexagonal lattice requires at least three tessellations. Each tessellation is associated with a local unitary operator and the product of the local operators defines the evolution operator of the staggered walk on the graph. After defining the evolution operator on the hexagonal lattice, we analyze the quantum walk dynamics with the focus on the position standard deviation and localization. We also obtain analytic results for the time complexity of spatial search algorithms with one marked node using cyclic boundary conditions.
description: 8 pages, 5 figures
Institute of Archaeology and Anthropology, University of South Carolina Site Survey Record 38BK2705
Creators: name: Fernandez, Rachel
Publisher: name: South Carolina Institute of Archaeology and Anthropology
Year: 2015
Subjects: North Air Force Auxiliary Field
Berkeley (County)
Orangeburg (County)
South Carolina (State / Territory)
Charles (County)
18th-20th centuries
Historic
38BK2705
Historic Scatter
Depression
Glass
Earthenware
Site Survey Records
Site Form
Archaeological Overview
Reconnaissance / Survey
Heritage Management
Systematic Survey

description: This document is a site form for site 38BK2705 recorded by the University of South Carolina.
Impact of coordinate frames on mode formation in twisted waveguides
Creators: name: Bürger, Johannes
name: Valero, Adrià Canós
name: Weiss, Thomas
name: Maier, Stefan A.
name: Schmidt, Markus A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Off-axis twisted waveguides possess unique optical properties such as circular and orbital angular momentum (OAM) birefringence, setting them apart from their straight counterparts. Analyzing mode formation in such helical waveguides relies on the use of specific coordinate frames that follow the twist of the structure, making the waveguide invariant along one of the new coordinates. In this study, the differences between modes forming in high-contrast off-axis twisted waveguides defined in the three most important coordinate systems - the Frenet-Serret, the helicoidal, or the Overfelt frame - are investigated through numerical simulations. We explore modal characteristics up to high twist rates (pitch: 50 $μ$m) and clarify a transformation allowing to map the modal fields and the effective index back to the laboratory frame.
 In case the waveguide is single-mode, the fundamental modes of the three types of waveguides show significant differences in terms of birefringence, propagation loss, and polarization. Conversely, the modal characteristics of the investigated waveguides are comparable in the multimode domain. Furthermore, our study examines the impact of twisting on spatial mode properties with the results suggesting a potential influence of the photonic spin Hall and orbital Hall effects. Additionally, modes of single-mode helical waveguides were found to exhibit superchiral fields on their surfaces.
 Implementation approaches such as 3D-nanoprinting or fiber-preform twisting open the doors to potential applications of such highly twisted waveguides, including chip-integrated devices for broadband spin- and OAM-preserving optical signal transport, as well as applications in chiral spectroscopy or nonlinear frequency conversion.
description: Main text (15 pages, 7 figures) and Supplemental Material (29 pages, 18 figures)
Concentrator of laser energy for thin vapour cloud production near a surface
Creators: name: Melnikov, P. I.
name: Knyazev, B. A.
name: Greenly, J. B.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A novel scheme is presented for production of a thin ($<1$ mm) uniform vapor layer over a large surface area ($>100$ cm$^2$) by pulsed laser ablation of a solid surface. Instead of dispersing the laser energy uniformly over the surface, a modified Fabry-Perot interferometer is employed to concentrate the laser energy in very narrow closely-spaced concentric rings. This approach may be optimized to minimum total laser energy for the desired vapor density. Furthermore, since the vapor is produced from a small fraction of the total surface area, the local ablation depth is large, which minimized the fraction of surface contamination in the vapor. Key words: laser evaporation, thin gas layer formation.
description: 8 pages, 2 figures
Additional file 2 of The FUS/circEZH2/KLF5/ feedback loop contributes to CXCR4-induced liver metastasis of breast cancer by enhancing epithelial-mesenchymal transition
Creators: name: Liu, Peng
name: Wang, Zehao
name: Ou, Xueqi
name: Wu, Peng
name: Zhang, Yue
name: Wu, Song
name: Xiao, Xiangsheng
name: Li, Yuehua
name: Ye, Feng
name: Tang, Hailin
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Science Policy
subject: Biological Sciences not elsewhere classified
subject: Information Systems not elsewhere classified
subject: Cancer
subject: Hematology
subject: Plant Biology

description: Additional file 2: Table S1. Sequences of siRNAs used in this study
Methods for Analysing Endothelial Cell Shape and Behaviour in Relation to the Focal Nature of Atherosclerosis
Creators: name: Iftikhar, Saadia
Publisher: name: Imperial College London
Year: 2011

description: The aim of this thesis is to develop automated methods for the analysis of the spatial patterns, and the functional behaviour of endothelial cells, viewed under microscopy, with applications to the understanding of atherosclerosis. Initially, a radial search approach to segmentation was attempted in order to trace the cell and nuclei boundaries using a maximum likelihood algorithm; it was found inadequate to detect the weak cell boundaries present in the available data. A parametric cell shape model was then introduced to fit an equivalent ellipse to the cell boundary by matching phase-invariant orientation fields of the image and a candidate cell shape. This approach succeeded on good quality images, but failed on images with weak cell boundaries. Finally, a support vector machines based method, relying on a rich set of visual features, and a small but high quality training dataset, was found to work well on large numbers of cells even in the presence of strong intensity variations and imaging noise. Using the segmentation results, several standard shear-stress dependent parameters of cell morphology were studied, and evidence for similar behaviour in some cell shape parameters was obtained in in-vivo cells and their nuclei. Nuclear and cell orientations around immature and mature aortas were broadly similar, suggesting that the pattern of flow direction near the wall stayed approximately constant with age. The relation was less strong for the cell and nuclear length-to-width ratios. Two novel shape analysis approaches were attempted to find other properties of cell shape which could be used to annotate or characterise patterns, since a wide variability in cell and nuclear shapes was observed which did not appear to fit the standard parameterisations. Although no firm conclusions can yet be drawn, the work lays the foundation for future studies of cell morphology. To draw inferences about patterns in the functional response of cells to flow, which may play a role in the progression of disease, single-cell analysis was performed using calcium sensitive florescence probes. Calcium transient rates were found to change with flow, but more importantly, local patterns of synchronisation in multi-cellular groups were discernable and appear to change with flow. The patterns suggest a new functional mechanism in flow-mediation of cell-cell calcium signalling.
Simple Construction of Elliptic Boundary K-Matrix
Creators: name: Hikami, Kazuhiro
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We give the infinite-dimensional representation for the elliptic $ K $-operator satisfying the boundary Yang-Baxter equation. By restricting the functional space to finite-dimensional space, we construct the elliptic $ K $-matrix associated to Belavin's completely $ \mathbb{Z} $-symmetric $ R $-matrix.
description: 10 pages, Latex2e with AMS
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Cart. 190 (11 H 75), 316 folios, f. 0068r
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0068r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome VI, Archives départementales de la Côte-d'Or, Cart. 190 (11 H 75), 316 folios, f. 0068r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
Polarization-Free Generators and the S-Matrix
Creators: name: Borchers, Hans-Juergen
name: Buchholz, Detlev
name: Schroer, Bert
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Polarization-free generators, i.e. ``interacting'' Heisenberg operators which are localized in wedge-shaped regions of Minkowski space and generate single particle states from the vacuum, are a novel tool in the analysis and synthesis of two-dimensional integrable quantum field theories. In the present article, the status of these generators is analyzed in a general setting. It is shown that such operators exist in any theory and in any number of spacetime dimensions. But in more than two dimensions they have rather delicate domain properties in the presence of interaction. If, for example, they are defined and temperate on a translation-invariant, dense domain, then the underlying theory yields only trivial scattering. In two-dimensional theories, these domain properties are consistent with non-trivial interaction, but they exclude particle production. Thus the range of applications of polarization-free generators seems to be limited to the realm of two-dimensional theories.
description: Dedicated to the memory of Harry Lehmann, 19 pages; revised version (proof of Lemma 3.4 corrected)
Cooperative wireless networks
Creators: name: Sheng, Zhengguo
Publisher: name: Imperial College London
Year: 2011

description: In the last few years, there have been a lot of interests in wireless ad-hoc networks as they have remarkable commercial and military applications. Such wireless networks have the benefit of avoiding a wired infrastructure. However, signal fading is a severe problem for wireless communications particularly for the multi-hop transmissions in the ad-hoc networks. Cooperative communication has been proposed as an effective way to improve the quality of wireless links. The key idea is to have multiple wireless devices at different locations cooperatively share their antenna resources and aid each other’s transmission. In this thesis, we develop effective algorithms for cooperative wireless ad-hoc networks, and the performance of cooperative communication is measured based on various criteria, such as cooperative region, power ratio and end-to-end performance. For example, the proposed interference subtraction and supplementary cooperation algorithms can significantly improve network throughput of a multi-hop routing. Comprehensive simulations are carried out for all the proposed algorithms and performance analysis, providing quantitative evidence and comparison over other schemes. In our view, the new cooperative communication algorithms proposed in this research enable wireless ad-hoc networks to improve radio unreliability and meet future application requirements of high-speed and high-quality services with high energy efficiency. The acquired new insights on the network performance of the proposed algorithms can also provide precise guidelines for efficient designs of practical and reliable communications systems. Hence these results will potentially have a broad impact across a range of related areas, including wireless communications, network protocols, radio transceiver design and information theory.
Strategies for Design of Future Distribution Networks
Creators: name: Gan, Chin Kim
Publisher: name: Imperial College London
Year: 2011

description: The role and economics of future distribution network design are fundamentally changing. One of the key elements of network design that is yet to be incorporated in the design is consideration of network losses given the increased energy costs coupled with a significant fall in price of distribution network equipment. In addition, the climate change challenge has focussed attention on energy efficiency and initiatives to potentially electrify heat and transport sectors. This thesis investigates the implications of alternative options for operation and design of distribution networks under various future development scenarios. To achieve this, a fractal-based distribution network model has been developed and implemented. In particular, the model allows for the creation of representative networks with various topological features, which is comparable with those of real distribution networks of similar topologies. The validity of the model has been demonstrated through the investigation of various alternative design options for Coventry network. Furthermore, relevant techniques have been developed for network assessment, allowing for the quantification of the impact of distributed energy resources on the distribution network performance and investment. The research findings suggest that losses will be a major driving factor for distribution network design. Such design should bring long-term economic and environment benefits, if compared with the historic peak-load driven design. The analyses from this research also suggest that three voltage level design (by phasing out the 33kV level) is likely to be more cost-effective in urban areas, while rural areas has potential voltage drop problem and suffer poor reliability performance from such design, making it economically unattractive. Finally, significant benefits of optimising demand response have been identified and quantified for different levels of penetrations of electric vehicles and heat pumps in the GB electricity distribution network.
Anomalous N=2 superconformal Ward identities
Creators: name: Ketov, Sergei V.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The N=2 superconformal Ward identities and their anomalies are discussed in N=2 superspace (including N=2 harmonic superspace), at the level of the low-energy effective action (LEEA) in four-dimensional N=2 supersymmetric field theories. The (first) chiral N=2 supergravity compensator is related to the known N=2 anomalous Ward identity in the N=2 (abelian) vector mulitplet sector. As regards the hypermultiplet LEEA given by the N=2 non-linear sigma-model (NLSM), a new anomalous N=2 superconformal Ward identity is found, whose existence is related to the (second) analytic compensator in N=2 supergravity. The celebrated solution of Seiberg and Witten is known to obey the (first) anomalous Ward identity in the Coulomb branch. We find a few solutions to the new anomalous Ward identity, after making certain assumptions about unbroken internal symmetries. Amongst the N=2 NLSM target space metrics governing the hypermultiplet LEEA are the SU(2)-Yang-Mills-Higgs monopole moduli-space metrics that can be encoded in terms of the spectral curves (Riemann surfaces), similarly to the Seiberg-Witten-type solutions. After a dimensional reduction to three spacetime dimensions (3d), our results support the mirror symmetry between the Coulomb and Higgs branches in 3d, N=4 gauge theories.
description: 24 pages; two references added; to appear in Nucl. Phys. B
Local and landscape effects of field margins on aerially dispersing beneficial insects and spiders
Creators: name: Oaten, Heather
Publisher: name: Imperial College London
Year: 2010

description: Field margins were implemented in UK agri-environment schemes with the aim to increase farmland biodiversity. Recently aerially dispersing aphid enemies have been shown to provide the majority of aphid control in winter wheat fields but there is a lack of research conducted on the aerial predator guild. This thesis examines the effect field margins have on aphid predators at the single field scale, the landscape scale and, using results from a marking study, examines the direct use of a pollen and nectar rich field margin by Episyrphus balteatus. At the single field scale, field margins had a positive effect of the numbers of Cantharidae, Empididae, Linyphiidae and Tachyporus spp. in fields with sown margins compared to those without during wheat growth and total aphid predator numbers were significantly higher in fields with margin surrounds in early May but not later in the year. At the landscape scale, results from twelve winter wheat fields with varying densities of surrounding field margins showed predatory Tachyporus spp. to exhibit a positive correlation at scales above 500m radius and Cantharidae to exhibit a negative correlation at local scales. Implications for field margins exerting both positive and negative influences on the presence of aerially dispersing aphid predators in winter wheat fields are discussed. A marking study using rubidium chloride proved direct utilisation of a pollen and nectar rich field margin by the Syrphid Episyrphus balteatus, and the traps used in this study also highlighted the association in distributions between Empididae and cereal aphids. Overall it was concluded that the presence of field margins does have an effect on the spatial and temporal distributions of some aerially dispersing aphid predators, but the response of each predator group varies depending on numerous interlinking components of their life history and directions for future research are discussed.
title: 01_0749
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Institute of Archaeology and Anthropology, University of South Carolina Site Survey Record 38BK2707
Creators: name: Fernandez, Rachel
Publisher: name: South Carolina Institute of Archaeology and Anthropology
Year: 2015
Subjects: North Air Force Auxiliary Field
Berkeley (County)
Orangeburg (County)
South Carolina (State / Territory)
Charles (County)
Prehistoric
Middle Woodland
38BK2707
Ceramic Scatter
Ceramic
Site Survey Records
Site Form
Archaeological Overview
Reconnaissance / Survey
Heritage Management
Systematic Survey

description: This document is a site form for site 38BK2707 recorded by the University of South Carolina.
Matter Fields in the Lagrangian Loop Representation: Scalar QED
Creators: name: Aroca, J. M.
name: Baig, M.
name: Fort, H.
name: Siri, R.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We present the extension of the Lagrangian loop gauge invariant representation in such a way to include matter fields. The partition function of lattice compact U(1)-Higgs model is expressed as a sum over closed as much as open surfaces. We have simulated numerically the loop action equivalent to the Villain form of the action and mapped out the beta-gamma phase diagram of this model.
description: 10 pages, LaTex
Amphiphilic α-cyanostilbene mesogens with oligooxyethylene polar tails: syntheses and properties
Creators: name: Ma, Tao
name: Zhao, Hongmei
name: Chang, Qing
name: Liu, Xinhao
name: Cheng, Xiaohong
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Space Science
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Chemical Sciences not elsewhere classified
subject: Information Systems not elsewhere classified

description: A series of amphiphilic rodlike α-cyanostilbene mesogens bearing an α-cyanostilbene core, with one/three lipophilic and flexible alkyl chains at one end and a polar oligooxyethylene (EO) at the opposite end, have been synthesized and investigated by polarized optical microscopy (POM), differential scanning calorimetry (DSC), X-ray scattering, scanning electron microscope (SEM), UV-vis spectroscopy and photoluminescence as well as CV measurements. These compounds can self-assemble into photoresponsive liquid crystalline phases and possess AIEE characteristics, mechanofluorochromic properties and Fe3+ recognition properties. The conductivity of the lithium cation complex was also measured to be 2.6 × 10−7 S m−1. Such compounds can be considered as a kind of multifunctional materials.
Investigating the mechanisms of action of VGF-derived peptides in the nervous system
Creators: name: Ayub, Mahmood
Publisher: name: Imperial College London
Year: 2012

description: The VGF neurosecretory protein, first identified as a nerve growth factor (NGF) inducible gene product, is selectively synthesised predominantly in neuronal and neuroendocrine cells. The ~68 kDa VGF protein sequence is rich in paired basic amino acids, and thus the protein undergoes endoproteolytic cleavage to produce smaller peptides, which are stored in dense core vesicles and released upon stimulation via the regulated secretory pathway both in vitro and in vivo. Several of these VGF-derived peptides have been characterised and are involved in energy homeostasis, reproductive processes, synaptic plasticity as well as pain modulation. A number of studies have observed an increase in VGF gene expression in various pain models and more recently the VGF-derived peptides, TLQP-21, LQEQ-19 and TLQP-62 showed direct modulation of inflammatory and neuropathic pain when applied in vivo. The molecular mechanisms of action of VGF-derived peptides are not well understood and were investigated in this study. The TLQP-21 peptide, but not LQEQ-19, was shown to dose-dependently induce an increase in intracellular Ca2+ levels from cellular internal stores in brain- and spinal cord-derived primary microglia, in >65 % of the cell population in vitro. Three hour treatment of primary microglia with TLQP-21 (100 nM) induced a 2.78 fold increase in Ccl11 and a 2.28 fold decrease in Cxcl9 gene expression levels relative to the vehicle control (Student's t-test; p ≤ 0.05). Biochemical analysis using affinity chromatography and LC-MS/MS techniques identified the gC1q-R protein as a potential binding partner / receptor for TLQP-21. The gC1q-R protein is a ubiquitously expressed, multi-compartmental protein involved in complement activation, inflammatory processes and the plasma bradykinin formation pathway. These results tentatively suggest that TLQP-21 may contribute to the modulation of pain through activation of primary microglia and potentially involve interactions with components of the complement system. The findings highlight the importance of VGF-derived peptides in pain research and could lead to new perspectives and targets for pain therapeutics.
Institute of Archaeology and Anthropology, University of South Carolina Site Survey Record 38BK2709
Creators: name: Fernandez, Rachel
Publisher: name: South Carolina Institute of Archaeology and Anthropology
Year: 2015
Subjects: North Air Force Auxiliary Field
Berkeley (County)
Orangeburg (County)
South Carolina (State / Territory)
Charles (County)
Prehistoric
Middle Woodland
38BK2709
Ceramic Scatter
Ceramic
Site Survey Records
Site Form
Archaeological Overview
Reconnaissance / Survey
Heritage Management
Systematic Survey

description: This document is a site form for site 38BK2709 recorded by the University of South Carolina.
On twisted Gelfand pairs through commutativity of a Hecke algebra
Creators: name: Hendel, Yotam I.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20G05, 22E50, 20G25 (Primary) 22D10, 22D12 (Secondary)

description: For a locally compact, totally disconnected group $G$, a subgroup $H$ and a character $χ:H \to \mathbb{C}^{\times}$ we define a Hecke algebra $\mathcal{H}_χ$ and explore the connection between commutativity of $\mathcal{H}_χ$ and the $χ$-Gelfand property of $(G,H)$, i.e. the property $\mathrm{dim}_\mathbb{C}(ρ^*)^{(H,χ^{-1})} \leq 1$ for every $ρ\in \mathrm{Irr}(G)$, the irreducible representations of $G$. We show that the conditions of the Gelfand-Kazhdan criterion imply commutativity of $\mathcal{H}_χ$, and verify in several simple cases that commutativity of $\mathcal{H}_χ$ is equivalent to the $χ$-Gelfand property of $(G,H)$. We then show that if $G$ is a connected reductive group over a $p$-adic field $F$, and $G/H$ is $F$-spherical, then the cuspidal part of $\mathcal{H}_χ$ is commutative if and only if $(G,H)$ satisfies the $χ$-Gelfand property with respect to all cuspidal representations ${ρ\in \mathrm{Irr}(G)}$. We conclude by showing that if $(G,H)$ satisfies the $χ$-Gelfand property with respect to all irreducible $(H,χ^{-1})$-tempered representations of $G$ then $\mathcal{H}_χ$ is commutative.
description: Final version following referee's remarks. 22 pages, comments welcome
Integration of the SL(2,R)/U(1) Gauged WZNW Theory by Reduction and Quantum Parafermions
Creators: name: Ford, C.
name: Jorjadze, G.
name: Weigt, G.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using a gauge invariant reduction we directly integrate the SL(2,R)/U(1) WZNW theory. We prove that the conserved parafermions of this theory are coset currents. Quantum mechanically, the parafermion algebra, the energy-momentum tensor, and `auxiliary' parafermions are deformed in a self-consistent manner.
description: 21 pages. In chapter 5 the symplectic 2-form rather than the 1-form is considered. Misprints in equations 65 and 86 (66 and A7 in the old version) corrected. Stylistic changes. Theor. Math. Phys., in press
Nanocellulose as building block for novel materials
Creators: name: Lee, Koon-Yang
Publisher: name: Imperial College London
Year: 2011

description: This thesis describes the fabrication of novel green materials using nanocellulose as the building block. Bacterial cellulose (BC) was used as the nanocellulose predominantly in this work. BC is highly crystalline pure cellulose with an inherent fibre diameter in the nano-scale. A single BC nanofibre was found to possess a Young’s modulus of 114 GPa. All these properties are highly favourable for using BC as a nanofiller/reinforcement in green nanocomposite materials. In this work, the surface of BC was rendered hydrophobic by grafting organic acids with various aliphatic chain lengths. These surface-modified BC was used as nanofiller for poly(L-lactide) (PLLA). Direct wetting measurements showed that the BC nanofibre-PLLA interface was improved due to the hydrophobisation of BC with organic acids. This led to the production of BC reinforced PLLA nanocomposites with improved tensile properties. Nanocellulose can also be obtained by grinding of wood pulp, producing nanofibrillated cellulose (NFC). The surface and bulk properties of one type of NFC and BC were compared in this work. Furthermore, the reinforcing ability of NFC and BC was also studied and it was observed that there is no significant difference in the mechanical performance of NFC or BC reinforced nanocomposites. A novel method based on slurry dipping to coat sisal fibres with BC was developed to modify the surface of natural fibres. This method can produce either (i) a densely BC coating layer or (ii) “hairy” BC coated sisal fibres. Randomly oriented short BC coated sisal fibre reinforced hierarchical composites were manufactured. It was found that hierarchical (nano)composites containing BC coated sisal fibres and BC dispersed in the matrix were required to produce composites with improved mechanical properties. This slurry dipping method was also extended to produce robust short sisal fibre preforms. By infusing this preform with a bio-based thermosetting resin followed by curing, green composites with significantly improved mechanical properties were produced. BC was also used as stabiliser and nano-filler for the production of macroporous polymers made by frothing of acrylated epoxidised soybean oil followed by microwave curing.
Combining Spreadsheet Smells for Improved Fault Prediction
Creators: name: Koch, Patrick
name: Schekotihin, Konstantin
name: Jannach, Dietmar
name: Hofer, Birgit
name: Wotawa, Franz
Publisher: name: arXiv
Year: 2018
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Spreadsheets are commonly used in organizations as a programming tool for business-related calculations and decision making. Since faults in spreadsheets can have severe business impacts, a number of approaches from general software engineering have been applied to spreadsheets in recent years, among them the concept of code smells. Smells can in particular be used for the task of fault prediction. An analysis of existing spreadsheet smells, however, revealed that the predictive power of individual smells can be limited. In this work we therefore propose a machine learning based approach which combines the predictions of individual smells by using an AdaBoost ensemble classifier. Experiments on two public datasets containing real-world spreadsheet faults show significant improvements in terms of fault prediction accuracy.
description: 4 pages, 1 figure, to be published in 40th International Conference on Software Engineering: New Ideas and Emerging Results Track