cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Endothelial cells manage fatty acid delivery to the cardiomyocytes following diabetes
Creators: name: Chiu, Amy Pei-Ling
Publisher: name: University of British Columbia
Year: 2017

description: In the diabetic heart, there is excessive dependence on fatty acid (FA) utilization to generate ATP. Lipoprotein lipase (LPL)-mediated hydrolysis of circulating triglyceride is suggested to be the predominant source of FA for cardiac utilization during diabetes. In the heart, LPL is produced in the cardiomyocytes and is transferred by its transporter glycosylphosphatidylinositol-anchored high-density lipoprotein-binding protein 1 (GPIHBP1) to the apical side of the endothelial cell (EC), where the enzyme is functional. We tested whether EC responds to hyperglycemia by increasing GPIHBP1. Streptozotocin diabetes increased cardiac LPL activity and GPIHBP1 gene and protein expression. Exposure of EC to high glucose-induced GPIHBP1 expression and amplified LPL shuttling across these cells. This effect coincided with an elevated secretion of heparanase, which can promote secretion of vascular endothelial growth factor (VEGF) from EC and cardiomyocytes. Recombinant VEGF induced EC GPIHBP1 mRNA and protein expression through activation of Notch signaling, which encompassed delta-like ligand 4 (DLL4) augmentation and nuclear translocation of the Notch intracellular domain. In addition, high glucose-induced secretion of heparanase is taken up by the cardiomyocyte to stimulate matrix-metalloproteinase (MMP) 9 expression and conversion of latent to active transforming growth factor-β (TGFβ). In the cardiomyocyte, TGFβ activation of RhoA enhances actin cytoskeleton rearrangement to promote LPL trafficking and secretion onto cell surface heparan sulfate proteoglycans. In the EC, TGFβ signaling promotes mesodermal homeobox 2 (Meox2) translocation to the nucleus that increases the expression of GPIHBP1, which facilitates movement of LPL to the vascular lumen. Collectively, EC, as the first responders to hyperglycemia, can release heparanase to liberate myocyte VEGF, which activates EC Notch signaling to facilitate GPIHBP1-mediated translocation of LPL across EC. Heparanase also induced MMP9 mediated activation of TGFβ. Its action on the cardiomyocyte to promote movement of LPL, together with its action on the EC to facilitate LPL shuttling are mechanisms that accelerate FA utilization by the diabetic heart. Gaining more insight into the mechanisms by which cardiac LPL is regulated may assist other researchers in devising new therapeutic strategies restore metabolic equilibrium, curb lipotoxicity, and help prevent or delay heart dysfunction characteristic of diabetes.
Higher Extensions of Lie Algebroids
Creators: name: Sheng, Yunhe
name: Zhu, Chenchang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the extension of a Lie algebroid by a representation up to homotopy, including semidirect products of a Lie algebroid with such representations. The extension results in a higher Lie algebroid. We give exact Courant algebroids and string Lie 2-algebras as examples of such extensions. We then apply this to obtain a Lie 2-groupoid integration of an exact Courant algebroid.
description: 32 pages
Localization of the phantom force induced by the tunneling current
Creators: name: Wutscher, Thorsten
name: Weymouth, Alfred J.
name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: 530 Physik

description: The phantom force is an apparently repulsive force, which can dominate the atomic contrast of an AFM image when a tunneling current is present. We described this effect with a simple resistive model, in which the tunneling current causes a voltage drop at the sample area underneath the probe tip. Because tunneling is a highly local process, the areal current density is quite high, which leads to an appreciable local voltage drop that in turn changes the electrostatic attraction between tip and sample. However, Si(111)-7×7 has a metallic surface state and it might be proposed that electrons should instead propagate along the surface state, as through a thin metal film on a semiconducting surface, before propagating into the bulk. In this paper, we first measure the phantom force on a sample that displays a metallic surface state [here, Si(111)-7×7] using tips with various radii. If the metallic surface state would lead to a constant electrostatic potential on the surface, we would expect a direct dependence of the phantom force with tip radius. In a second set of experiments, we study H/Si(100), a surface that does not have a metallic surface state. We conclude that a metallic surface state does not suppress the phantom force, but that the local resistance Rs has a strong effect on the magnitude of the phantom force.
Der Datenmanagementplan als Teil eines Förderantrags und wie Bibliotheken dabei forschungsnah unterstützen.
Creators: name: Strauch, Annette
Publisher: name: Zenodo
Year: 2020
Subjects: FDM
Forschungsdatenmanagement
Forschungsförderung
Bibliotheken
Universitätsbibliotheken
UB
Forschung
RDM
eScience

description: Wissenschaftliche Bibliotheken unterstützen Forschenderinnen und Forscher bei der Erstellung von Drittmittelanträgen, etwa durch die Beratung zu Datenmanagementplänen.
 Anhand konkreter Use Cases und wird die Beteiligung von Bibliotheken bei Drittmittelanträgen in dieser Präsentation erläutert.
Optical control of magnetization of micron-size domains in antiferromagnetic NiO single crystals
Creators: name: Higuchi, Takuya
name: Kanda, Natsuki
name: Tamaru, Hiroharu
name: Kuwata-Gonokami, Makoto
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose Raman-induced collinear difference-frequency generation (DFG) as a method to manipulate dynamical magnetization. When a fundamental beam propagates along a threefold rotational axis, this coherent second-order optical process is permitted by angular momentum conservation through the rotational analogue of the Umklapp process. As a demonstration, we experimentally obtained polarization properties of collinear magnetic DFG along a [111] axis of a single crystal of antiferromagnetic NiO with micro multidomain structure, which excellently agreed with the theoretical prediction.
description: 11 pages, 3 figures, submitted to Physical Review Letters
title: Quartierspiegel Fluntern 2024
Creators: name: (:Unkn) Unknown
Publisher: name: Zentralbibliothek Zürich
Year: 2024
Subjects: subject: 314 Allgemeine Statistiken zu Europa
subject: 710 Städtebau, Raumplanung, Landschaftsgestaltung
subject: 949 Geschichte anderer Teile Europas
subject: Zürich-Fluntern
subject: Zürich / Kreis 7
subject: Quartier
subject: Amtliche Statistik
subject: Bevölkerungsstatistik

description: Charakteristisch für das Quartier Fluntern ist die lockere Bebauung mit Villen und freistehenden Mehrfamilienhäusern des 19. und 20. Jahrhunderts. Auch die Gärten mit ihrem bemerkenswerten Baumbestand prägen den Zürichberg. Der gemeinnützige Wohnungsbau dagegen ist weniger markant.
Phantom Force Induced by Tunneling Current: A Characterization on Si(111)
Creators: name: Weymouth, Alfred J.
name: Wutscher, Thorsten
name: Welker, Joachim
name: Hofman, Thomas
name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 530 Physik
subject: 73.63.Rt
subject: 68.37.Ps
subject: 73.50.-h

description: Simultaneous measurements of tunneling current and atomic forces provide complementary atomic-scale data of the electronic and structural properties of surfaces and adsorbates. With these data, we characterize a strong impact of the tunneling current on the measured force on samples with limited conductivity. The effect is a lowering of the effective gap voltage through sample resistance which in turn lowers the electrostatic attraction, resulting in an apparently repulsive force. This effect is expected to occur on other low-conductance samples, such as adsorbed molecules, and to strongly affect Kelvin probe measurements when tunneling occurs.
A Dental System in Decay: An Exploration and Evaluation of Social Responsibility and Medicaid in Dentistry
Creators: name: Wollaeger, Mia
Publisher: name: University of Chicago
Year: 2022

description: While oral health is important to one’s overall health, it often does not receive the same attention as other health services. As health inequities rise and dentistry becomes more subject to economic pressure, there is concern regarding dental students’ moral education, character development, and capacity to provide care for vulnerable populations. Existing literature does not fully explore the application of social responsibility to dentistry and the relationship between social responsibility and Medicaid participation. In this paper, I examine how dentists in Illinois conceptualize social responsibility as it relates to Medicaid and the manifestation of social responsibility in dentistry. Through a series of semi-structured interviews with dentists and orthodontists in Illinois, I discover a tension between practicing social responsibility and participating in Medicaid, as this social welfare program violates the financial, legal, and ethical obligations integral to practicing social responsibility. These findings help inform the promotion of social responsibility among the next generation of dentists and the improvement of access to dental care for low-income populations. Recommendations from this study include the use of workshops and town meetings hosted by the Illinois Department of Healthcare and Family Services to address administrative burdens related to Medicaid, dental school curriculum that promotes social responsibility through service learning, and increased funding and proliferation of Federally Qualified Health Centers in Illinois.
Phase transitions in nanoconfined binary mixtures of highly oriented colloidal rods
Creators: name: Heras, Daniel de las
name: Martinez-Raton, Yuri
name: Velasco, Enrique
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We analyse a binary mixture of colloidal parallel hard cylindrical particles with identical diameters but dissimilar lengths $L_1$ and $L_2$, with $s=L_2/L_1=3$, confined by two parallel hard walls in a planar slit-pore geometry, using a fundamental--measure density functional theory. This model presents nematic (N) and two types of smectic (S) phases, with first- and second-order N-S bulk transitions and S-S demixing, and surface behaviour at a single hard wall which includes complete wetting by the S phase mediated (or not) by an infinite number of surface-induced layering (SIL) transitions. In the present paper the effects of confinement on this model colloidal fluid mixture are studied. Confinement brings about profound changes in the phase diagram, resulting from competition between the three relevant length scales: pore width $h$, smectic period $d$ and length ratio $s$. Four main effects are identified: (i) Second-order bulk N-S transitions are suppressed. (ii) Demixing transitions are weakly affected, with small shifts in the $μ_1-μ_2$ (chemical potentials) plane. (iii) Confinement-induced layering (CIL) transitions occurring in the two confined one-component fluids in some cases merge with the demixing transition. (iv) Surface-induced layering (SIL) transitions occurring at a single surface as coexistence conditions are approached are also shifted in the confined fluid. Trends with pore size are analysed by means of complete $μ_1-μ_2$ and $p-\bar{x}$ (pressure-mean pore composition) phase diagrams for particular values of pore size. This work, which is the first one to address the behaviour of liquid-crystalline mixtures under confinement, could be relevant as a first step to understand self-assembling properties of mixtures of metallic nanoparticles under external fields in restricted geometry.
description: 29 pages, 13 figures.
title: Quartierspiegel Hottingen 2024
Creators: name: (:Unkn) Unknown
Publisher: name: Zentralbibliothek Zürich
Year: 2024
Subjects: subject: 314 Allgemeine Statistiken zu Europa
subject: 710 Städtebau, Raumplanung, Landschaftsgestaltung
subject: 949 Geschichte anderer Teile Europas
subject: Hottingen (Zürich)
subject: Zürich / Kreis 7
subject: Quartier
subject: Amtliche Statistik
subject: Bevölkerungsstatistik

description: Im Quartier Hottingen treffen Welten aufeinander, verbunden durch die Dolderbahn: Während im Grand Hotel Dolder seit Jahrzehnten die Reichen und Schönen gastieren und im FIFA-Hauptsitz über die Geschicke des Weltfussballs entschieden wird, befinden sich unten in der Nähe der Talstation das Kinderspital und die ehemalige Pflegerinnenschule.
From atomic kinks to mesoscopic surface patterns: Ionic layers on vicinal metal surfaces
Creators: name: Fölsch, Stefan
name: Riemann, Andreas
name: Repp, Jascha
name: Meyer, Gerhard
name: Rieder, Karl-Heinz
Publisher: name: Universität Regensburg
Year: 2002
Subjects: subject: 530 Physik

description: A highly regular assembly of three-sided pyramids can be fabricated by growing the ionic insulator NaCl on the kinked metal surface Cu(532). Only two pyramid faces are covered by NaCl, resulting in an overall surface structure which is modulated in surface chemical behavior. Scanning tunneling microscopy shows that the underlying restructuring mechanism can be attributed to a clear-cut criterion for enhanced interface stability mediated by electrostatic interactions. This criterion provides a generally applicable guideline to create nano- to mesoscopic surface structures by design.
¿Existen diferencias en el deseo sexual en función del tipo de adhesión al doble estándar sexual?
Creators: name: Álvarez-Muelas, Ana
Publisher: name: Zenodo
Year: 2023
Subjects: investigación
sexología
doble estándar sexual
deseo sexual

description: Presentación titulada "¿Existen diferencias en el deseo sexual en función del tipo de adhesión al doble estándar sexual?" en el XVI Congreso Español y Euroamericano de Sexología.
title: π-conjugated pyrenoimidazole derivatives: synthesis, spectroscopic and crystallographic studies
Creators: name: Tabasi, Zahra A.
Publisher: name: Memorial University of Newfoundland
Year: 2020

description: This PhD thesis was aimed at the design and synthesis of new functional phenyl-pyrenoimidazole derivatives and the development of these compounds as novel chromophores/uorophores and supramolecular synthons for organic crystal engineering. An efficient and modular one-pot condensation reaction between 4,5-pyrenedione and various benzaldehydes in presence of ammonium acetate and acetic acid was used to prepare all the new phenyl-pyrenoimidazoles investigated in this thesis work. There are three major projects accomplished in this thesis. The first project investigated the properties of two new benzaldehyde-substituted pyrenoimidazoles, in which the electron-withdrawing formyl group is attached to the para and meta position of the phenyl group. These two isomers were characterized by various spectroscopic, X-ray single crystallographic analyses, in conjunction with density functional theory (DFT) calculations. The interactions of these two new compound with uoride anions through hydrogen bonds were examined as well, and the results demonstrated the applicability of the para-benzaldehyde substituted pyrenoimidazole as an efficient ratiometric uorescence probe for uoride anion. In the second project, a series of phenyl-pyrenoimidazole substituted with various organic functional groups (including CH₃, Cl, Br, OCH₃, CHO, and NO₂) were synthesized and their structure photophysical property relationships were subsequently studied by UV-Vis absorption and uorescence spectroscopy. Xray crystallographic and molecular electrostatic potential (MEP) analyses were undertaken to disclose the interplay of various non-covalent forces that govern the crystal packing of these pyrenoimidazole molecules. The results indicated that the substituent group is an important factor controlling the crystal structural properties, which attests to the possibility of using various phenylpyrenoimidazole derivatives as tunable supramolecular synthons for crystal engineering. In the third project, hydroxyl and alkoxyl-substituted phenyl-pyrenoimidazole derivatives were prepared and investigated for comparative studies of the effects of hydrogen bonding and π - π interactions on their crystallization behaviors. To construct different organic crystals, various aromatic carboxylic acids were used with these pyrenoimidazoles. The resulting crystal structures were analyzed by X-ray crystallography to show the formation of different supramolecular network structures in the solid state. Based on the crystallographic data obtained, Hirshfeld surface analysis and quantum theory of atoms in molecules (QTAIM) calculations were carried out to quantitatively interpret and comprehensively visualize the various intermolecular forces, such as hydrogen bonding, π - π, C-H...π, and H...H interactions, in the pyrenoimidazole crystals and co-crystals.
AF-algebras and topology of mapping tori
Creators: name: Nikolaev, Igor
Publisher: name: arXiv
Year: 2010
Subjects: subject: Operator Algebras (math.OA)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 46L85, 55S35

description: A covariant functor from the category of mapping tori to a category of AF-algebras is constructed; the functor takes continuous maps between such manifolds to stable homomorphisms between the corresponding AF-algebras. We use this functor to develop an obstruction theory for the torus bundles of dimension 2, 3 and 4.
description: to appear Czechoslovak Math. J
Stochastic Optimal Control for Online Seller under Reputational Mechanisms
Creators: name: Bradonjić, Milan
name: Causley, Matthew
name: Cohen, Albert
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this work we propose and analyze a model which addresses the pulsing behavior of sellers in an online auction (store). This pulsing behavior is observed when sellers switch between advertising and processing states. We assert that a seller switches her state in order to maximize her profit, and further that this switch can be identified through the seller's reputation. We show that for each seller there is an optimal reputation, i.e., the reputation at which the seller should switch her state in order to maximize her total profit. We design a stochastic behavioral model for an online seller, which incorporates the dynamics of resource allocation and reputation. The design of the model is optimized by using a stochastic advertising model from (16) and used effectively in the Stochastic Optimal Control of Advertising (12). This model of reputation is combined with the effect of online reputation on sales price empirically verified in (9). We derive the Hamilton-Jacobi-Bellman (HJB) differential equation, whose solution relates optimal wealth level to a seller's reputation. We formulate both a full model, as well as a reduced model with fewer parameters, both of which have the same qualitative description of the optimal seller behavior. Coincidentally, the reduced model has a closed form analytical solution that we construct.
Simulation of diurnal cycles in flat and complex terrain using the WRF-LES model
Creators: name: Chavez Arroyo, Roberto Aurelio
name: Vidal Pérez, José
name: Sanz Rodrigo, Javier
name: Santos, Pedro
name: Ávila, Matías
name: Beaucage, Philippe
Publisher: name: Zenodo
Year: 2021
Subjects: WRF-LES
wind resource assessment
model validation
ABL modelling
wind conditions

description: This work addresses specifically the setup and evaluation of the multiscale large-eddy simulation (LES) version of the Weather Research and Forecasting Model (WRF-LES). To this end, the wind fields simulated by WRF-LES are examined at two sites that depict very different climate and orographic environments: the Cabauw Experimental Site for Atmospheric Research in the Netherlands and the Alaiz test site, located in a mountainous area in northeast Spain, which has been part of the New European Wind Atlas (NEWA) experimental campaigns. The site’s selection lines up with the efforts carried out by the International Energy Agency (IEA) Task 31 to set up a wind flow modelling and evaluation framework. So, we take advantage of their curated experimental database, particularly from two of their carefully prepared benchmarks used for this evaluation: GABLS3 and ALEX17, conducted at Cabauw and Alaiz, respectively. These benchmarks analyze weather episodes of one-to-few days duration to assess the model’s accuracy to simulate diurnal cycles with strong mesoscale components in flat and complex terrain environments. Additionally, we’ve explored the sensitivity to the following model’s setup. 1) Domain configuration, 2) Planetary Boundary Layer (PBL) schemes, and 3) Subfilter-scale (SFS) models set at the LES-resolved numerical domains.
Orientation of individual C₆₀ molecules adsorbed on Cu(111): Low-temperature scanning tunneling microscopy and density functional calculations
Creators: name: Larsson, J. Andreas
name: Elliott, Simon D.
name: Greer, James C.
name: Repp, Jascha
name: Meyer, Gerhard
name: Allenspach, Rolf
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik

description: Density functional theory (DFT) and low-temperature scanning tunneling microscopy (STM) have been combined to examine the bonding of individual C60 molecules on Cu(111). Energy-resolved differential-conductance maps have been measured for individual C60 molecules adsorbed on a Cu(111) surface by means of low-temperature STM, which are compared to and complemented by theoretically computed spectral images. It has been found that C60 chemisorbs with a six-membered ring parallel to the surface at two different Cu(111) binding sites that constitute two exclusive hexagonal sublattices. On each sublattice, C60 is bonded in one particular rotational conformer, i.e., C60 molecules bind to the Cu(111) surface in two different azimuthal orientations differing by 60° depending on which sublattice the binding site belongs to. The binding conformation of C60 and its orientation with regard to the copper surface can be deduced by this joint experimental-theoretical approach. Six possible pairs of C60 configurations on three different Cu surface binding sites have been identified that fulfil the requirements of the two sublattices and are consistent with all experimental and theoretical data. Theory proposes that two of these configuration pairs are most likely. We have found that DFT does not get the binding energy between rotational conformers in the correct order. We also report two different C60 monolayers on Cu(111): one with alternating orientations of neighboring molecules at low temperature and the other with (4×4) structure after annealing above room temperature.
title: Английский язык в сфере электро- и теплоэнергетики
Creators: name: ELS IPR BOOKS
Publisher: name: Санкт-Петербургский государственный университет промышленных технологий и дизайна
Year: 2024

description: Учебное пособие посвящено практическому овладению научной речью в сфере профессионального общения для электро- и теплоэнергетических профессий и специальностей. Предназначено для студентов учреждений среднего профессионального образования.
Mining Frequent Itemsets Using Genetic Algorithm
Creators: name: Ghosh, Soumadip
name: Biswas, Sushanta
name: Sarkar, Debasree
name: Sarkar, Partha Pratim
Publisher: name: arXiv
Year: 2010
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: In general frequent itemsets are generated from large data sets by applying association rule mining algorithms like Apriori, Partition, Pincer-Search, Incremental, Border algorithm etc., which take too much computer time to compute all the frequent itemsets. By using Genetic Algorithm (GA) we can improve the scenario. The major advantage of using GA in the discovery of frequent itemsets is that they perform global search and its time complexity is less compared to other algorithms as the genetic algorithm is based on the greedy approach. The main aim of this paper is to find all the frequent itemsets from given data sets using genetic algorithm.
Probing the shape of atoms in real space
Creators: name: Herz, Markus
name: Giessibl, Franz J.
name: Mannhart, F.
Publisher: name: Universität Regensburg
Year: 2003
Subjects: subject: 530 Physik
subject: 68.37.Ef
subject: 68.47.Fg
subject: 68.37.Ps

description: The structure of single atoms in real space is investigated by scanning tunneling microscopy. Very high resolution can be obtained by a dramatic reduction of the tip-sample distance. The instabilities which are normally encountered while using small tip-sample distances are avoided by oscillating the tip of the scanning tunneling microscope vertically with respect to the sample. The surface atoms of Si(111)-(7×7) with their well-known electronic configuration are used to image individual samarium, cobalt, iron, and silicon atoms. The resulting images resemble the charge density corresponding to 4f, 3d, and 3p atomic orbitals.
Grouping variables in bias and impact detection : an attributional stance for observational studies
Creators: name: Zou, Danjie
Publisher: name: University of British Columbia
Year: 2017

description: Group disparity in the desired outcome (e.g., academic achievement) has always been a research emphasis. A group comparison is fair and meaningful only if the measured scores are comparable and free from bias. Measurement bias is closely connected to test fairness and has been investigated for decades. In the psychometric literature, the concepts of DIF, bias and impact are interconnected but different from one another. Wu et al.'s (2017) attributional framework, based on group comparison, explicates the differences among them and provides analytical procedures to detect bias and impact. Their attributional view makes the definition and interpretation of bias and impact sensible and meaningful even when groups are non-experimentally formed. Building on Wu et al.'s (2017) framework, the purpose of this thesis is to address the issues arising from group comparisons intended to test a causal hypothesis in observational studies. Specifically, this thesis focuses on the concerns with interpreting and communicating bias and impact detection based on comparisons between "pre-existing" groups (i.e., groups differ in their socio-demographic characteristics that exist before testing or research). To this end, Chapter 1 provides background knowledge of DIF, bias and impact, including their relationships with test fairness, measurement invariance, and validity. The terminology of DIF, bias, impact and the manners in which they are connected with and distinct from one another are discussed. The definition of bias and impact refined by Wu et al. are then reviewed. Chapter 2 distinguishes various types of grouping variables and proposes a typology for grouping variables resulting from different research designs in social and behavioral research. Based on the typology, difficulties in interpreting the results of applying Rubin's causal model (Rosenbaum & Rubin, 1983) are discussed. Chapter 3 presents relevant terminologies and techniques according to Wu et al.'s analytical procedures for studying bias and impact, including the propensity score, statistical matching, and conditional logistic regression. In Chapter 4, two data examples are illustrated to show how the adapted conceptual, methodological, and technical rhetoric helps to clarify the long-standing confusions in understanding and communicating bias and impact. Chapter 5 summarizes contributions and limitations of this thesis, and future work.
Temperature responsive phosphorescent small unilamellar vesicles
Creators: name: Bhuyan, Mouchumi
name: König, Burkhard
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: 540 Chemie

description: Self-assembled lipid vesicles with embedded amphiphilic terbium(III) complexes show a strong temperature dependence of their phosphorescence intensity and lifetime in the physiological range.
title: Английский язык для химических профессий и специальностей
Creators: name: ELS IPR BOOKS
Publisher: name: Санкт-Петербургский государственный университет промышленных технологий и дизайна
Year: 2024

description: Учебное пособие посвящено практическому овладению научной речью в сфере профессионального общения для химических профессий и специальностей. Предназначено для студентов учреждений среднего профессионального образования.
Arhangel'ski\uı sheaf amalgamations in topological groups
Creators: name: Tsaban, Boaz
name: Zdomskyy, Lyubomyr
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Topology (math.GN)
subject: Logic (math.LO)
subject: FOS: Mathematics

description: We consider amalgamation properties of convergent sequences in topological groups and topological vector spaces. The main result of this paper is that, for arbitrary topological groups, Nyikos's property $α_{1.5}$ is equivalent to Arhangel'ski\uı's formally stronger property $α_1$. This result solves a problem of Shakhmatov (2002), and its proof uses a new perturbation argument. We also prove that there is a topological space $X$ such that the space $C_p(X)$ of continuous real-valued functions on $X$, with the topology of pointwise convergence, has Arhangel'ski\uı's property $α_1$ but is not countably tight. This result follows from results of Arhangel'ski\uı--Pytkeev, Moore and Todorčević, and provides a new solution, with remarkable properties, to a problem of Averbukh and Smolyanov (1968) concerning topological vector spaces. The Averbukh--Smolyanov problem was first solved by Plichko (2009), using Banach spaces with weaker locally convex topologies.
description: Final version (minor changes)
Analysis of force-deconvolution methods in frequency-modulation atomic force microscopy
Creators: name: Welker, Joachim
name: Illek, Esther
name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: frequency-modulation atomic force microscopy; force deconvolution; numerical implementation
subject: 530 Physik

description: In frequency-modulation atomic force microscopy the direct observable is the frequency shift of an oscillating cantilever in a force field. This frequency shift is not a direct measure of the actual force, and thus, to obtain the force, deconvolution methods are necessary. Two prominent methods proposed by Sader and Jarvis (Sader–Jarvis method) and Giessibl (matrix method) are investigated with respect to the deconvolution quality. Both methods show a nontrivial dependence of the deconvolution quality on the oscillation amplitude. The matrix method exhibits spikelike features originating from a numerical artifact. By interpolation of the data, the spikelike features can be circumvented. The Sader–Jarvis method has a continuous amplitude dependence showing two minima and one maximum, which is an inherent property of the deconvolution algorithm. The optimal deconvolution depends on the ratio of the amplitude and the characteristic decay length of the force for the Sader–Jarvis method. However, the matrix method generally provides the higher deconvolution quality.
Dilation of Ritt operators on L^{p}-spaces
Creators: name: Arhancet, Cedric
name: Merdy, Christian Le
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47B38, 47A20, 47A60

description: For any Ritt operator T:L^{p}(Ω) --> L^{p}(Ω), for any positive real number α, and for any x in L^{p}, we consider the square functions |x |_{T,α} = \Bigl| \Bigl(\sum_{k=1}^{\infty} k^{2α-1}\bigl |T^{k-1}(I-T)^αx \bigr|^2 \Bigr)^{1/2}_{L^{p}}. We show that if T is actually an R-Ritt operator, then these square functions are pairwise equivalent. Then we show that T and its adjoint T* acting on L^{p'} both satisfy uniform estimates |x|_{T,1} \lesssim |x|_{L^{p}} and |y|_{T*,1} \lesssim |y|_{L^{p'}} for x in L^{p} and y in L^{p'} if and only if T is R-Ritt and admits a dilation in the following sense: there exist a measure space \widetildeΩ, an isomorphism U of L^{p}(\widetildeΩ) such that the sequence of all U^{n} for n varying in Z is bounded, as well as two bounded maps J : L^{p}(Ω) --> L^{p}(\widetildeΩ) and Q : L^{p}(\widetildeΩ) --> L^p(Ω) such that T^{n}=QU^{n}J for any nonnegative integer n. We also investigate functional calculus properties of Ritt operators and analogs of the above results on noncommutative L^{p}-spaces.
description: Minor corrections
Preparation of light-atom tips for scanning probe microscopy by explosive delamination
Creators: name: Hofmann, Thomas
name: Welker, Joachim
name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2010
Subjects: subject: 530 Physik

description: To obtain maximal resolution in scanning tunneling microscopy (STM) and atomic force microscopy, the size of the protruding tip orbital has to be minimized. Beryllium as tip material is a promising candidate for enhanced resolution because a beryllium atom has just four electrons, leading to a small covalent radius of only 96 pm. Besides that, beryllium is conductive and has a high elastic modulus, which is a necessity for a stable tip apex. However, beryllium tips that are prepared ex situ are covered with a robust oxide layer, which cannot be removed by just heating the tip. Here, the authors present a successful preparation method that combines the heating of the tip by field emission and a mild collision with a clean metal plate. That method yields a clean, oxide-free tip surface as proven by a work function of Φexpt = 5.5 eV as deduced from a current-distance curve. Additionally, a STM image of the Si-(111)-(7×7) is presented to prove the single-atom termination of the beryllium tip.
Searching atomic spin contrast on nickel oxide (001) by force microscopy
Creators: name: Schmid, Martin
name: Mannhart, Jochen
name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2008
Subjects: subject: 530 Physik
subject: 81.65.Cf
subject: 81.65.Ps

description: The (001) surface of NiO, an antiferromagnet at room temperature, was investigated under ultrahigh vacuum conditions with frequency modulation atomic force microscopy. The antiferromagnetic coupling between ions leads to a spin superstructure on (001) surfaces. Exchange interaction between the probe of a force microscope and the NiO (001) surface should allow us to image spin superstructures in real space. The surface was imaged with three different probing tips: nonmagnetic W tips, ferromagnetic Co tips, and antiferromagnetic NiO tips—and atomic resolution was achieved with all three of them in various distance regimes and in several channels. Atomic resolution is obtained with all tips, but evidence for spin contrast is lacking although oscillation amplitudes in the angstrom regime have been used, where optimal signal-to-noise ratio is expected.
Variational integrator for fractional Euler-Lagrange equations
Creators: name: Bourdin, Loïc
name: Cresson, Jacky
name: Greff, Isabelle
name: Inizan, Pierre
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 70H03, 37K05, 26A33

description: We extend the notion of variational integrator for classical Euler-Lagrange equations to the fractional ones. As in the classical case, we prove that the variational integrator allows to preserve Noether-type results at the discrete level.
description: This is a preprint of a paper whose final and definite form is published in Applied Numerical Mathematics
Efficient Disambiguation of Task Instructions in Crowdsourcing
Creators: name: Manam, Venkata Krishna Chaithanya
Publisher: name: Purdue University Graduate School
Year: 2023
Subjects: Human-computer interaction
Computational linguistics

description: Crowdsourcing allows users to offload tedious work to an on-demand workforce. However, the time saved by the requesters is often offset by the time they must spend preparing instructions and refining them to address the ambiguities that typically arise. If crowdsourcing is to become viable, and result in net gains for requesters, requesters must be able to obtain high-quality results with a low investment of time in writing instructions. That might mean finding ways to accommodate hastily written instructions. Instruction quality could be improved by resolving ambiguities either with help of crowd workers, or by using NLP-based tools.
 In this dissertation, I present 1) a taxonomy of ambiguities that can occur in task instructions, 2) a workflow that enables requesters to resolve ambiguities before posting them to workers, 3) a set of methods to improve the quality of instructions while workers are working on the task, and finally, 4) a system that leverages current NLP technologies to detect ambiguities automatically before they are posted to the workers.
Fibroblasts (Tcf4) and mesenchymal progenitors (PDGFRα) correspond to the same cell type and are increased in skeletal muscle dystrophy, denervation and chronic damage
Creators: name: Contreras, Osvaldo
name: Rebolledo, Daniela
name: Oyarzún, Juan
name: Brandan, Enrique
Publisher: name: F1000 Research Limited
Year: 2019

description: Skeletal muscle fibrosis originates at least, from PDGFRα-positive cells (mesenchymal progenitors) that contribute to fat accumulation and fibrosis under pathogenic conditions in mice and humans. The transcription factor Tcf4 (Tcf7L2) identifies connective tissue fibroblasts that are closely associated with muscle. In vitro studies suggest that Tcf4 and PDGFRα identify the same cell type but there are no in vivo studies that corroborate these observation. Recently, our laboratory showed elevated numbers of Tcf4-positive cells in gastrocnemius of mdx mice. Despite of this initial observation a precise analysis of the localization of cells positive for Tcf4 or PDGFRα in other pathological muscles is needed.
Uniqueness and Nondegeneracy of Ground States for $(-Δ)^s Q + Q - Q^{α+1} = 0$ in $\mathbb{R}$
Creators: name: Frank, Rupert L.
name: Lenzmann, Enno
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We prove uniqueness of ground state solutions $Q = Q(|x|) \geq 0$ for the nonlinear equation $(-Δ)^s Q + Q - Q^{α+1}= 0$ in $\mathbb{R}$, where $0 < s < 1$ and $0 < α< \frac{4s}{1-2s}$ for $s < 1/2$ and $0 < α< \infty$ for $s \geq 1/2$. Here $(-Δ)^s$ denotes the fractional Laplacian in one dimension. In particular, we generalize (by completely different techniques) the specific uniqueness result obtained by Amick and Toland for $s=1/2$ and $α=1$ in [Acta Math., \textbf{167} (1991), 107--126]. As a technical key result in this paper, we show that the associated linearized operator $L_+ = (-Δ)^s + 1 - (α+1) Q^α$ is nondegenerate; i.\,e., its kernel satisfies $\mathrm{ker}\, L_+ = \mathrm{span}\, \{Q'\}$. This result about $L_+$ proves a spectral assumption, which plays a central role for the stability of solitary waves and blowup analysis for nonlinear dispersive PDEs with fractional Laplacians, such as the generalized Benjamin-Ono (BO) and Benjamin-Bona-Mahony (BBM) water wave equations.
description: 45 pages
Probing the large-scale structure of the Universe with the Sunyaev-Zel'dovich Effect
Creators: name: Tanimura, Hideki
Publisher: name: University of British Columbia
Year: 2017

description: The Sunyaev-Zeldovich (SZ) effect is a spectral distortion in the Cosmic Microwave Background (CMB), due to up-scattering of CMB photons by high energy electrons in clusters of galaxies or any cosmic structure. The Planck satellite mission has measured the spectral distortion with great sensitivity and has produced a full-sky SZ (y) map, which can be used to trace the large-scale structure of the Universe. In this dissertation, I construct the average SZ (y) profile of ∼ 65,000 Luminous Red Galaxies (LRGs) from the Sloan Digital Sky Survey Data Release 7 (SDSS/DR7) using the Planck y map and compare the measured profile with predictions from the cosmo-OWLS suite of cosmological hydrodynamical simulations. This comparison agrees well for models that include feedback from active galactic nuclei (AGN feedback). In addition, I search for the SZ signal due to gas filaments between ∼260,000 pairs of LRGs taken from the Sloan Digital Sky Survey Data Release 12 (SDSS/DR12), lying between 6-10 h −1 Mpc of each other in the tangential direction and within 6h −1 Mpc in the radial direction. I find a statistically significant SZ signal between the LRG pairs. This is the first detection of gas plausibly located in filaments, expected to exist in the large-scale structure of the universe. I compare this result with the BAHAMAS suite of cosmological hydrodynamical simulations and find that it predicts a slightly lower, but marginally consistent result. As an extension of my MSc. thesis work, I study CMB polarization. The B-mode component of CMB polarization is an important observable to test the theory of inflation in the early universe. However, foreground emissions in our own galaxy dominates the B-mode signal and therefore multi-frequency observations will be required to separate any CMB signal from the foreground emission. I assess the value of adding a new low-frequency channel at 10 GHz for the foreground removal problem by simulating realistic experimental data. I find that such a channel can greatly improve our determination of the synchrotron component which, in turn, significantly improves the reliability of the CMB separation.
Pathogen diversity drives the evolution of generalist HLA alleles
Creators: name: Máté Manczinger
name: Boross, Gábor
name: Kemény, Lajos
name: Müller, Viktor
name: Lenz, Tobias
name: Papp, Balázs
name: Pál, Csaba
Publisher: name: F1000 Research Limited
Year: 2019

description: Central players of the adaptive immune system are the groups of proteins encoded in the major histocompatibility complex (MHC), which shape the immune response against pathogens and tolerance to self-peptides. The corresponding genomic region is of particular interest, as it harbors more disease associations than any other region in the human genome, including associations with infectious diseases, autoimmune disorders, cancers, and neuropsychiatric diseases. Certain MHC molecules can bind to a much wider range of epitopes than others, but the functional implication of such an elevated epitope binding repertoire has remained largely unclear. It has been suggested that by recognizing more peptide segments, such promiscuous MHC molecules promote an immune response against a broader range of pathogens. If so, the geographical distribution of MHC promiscuity level should be shaped by pathogen diversity. We found that in pathogen-rich geographical regions, humans are more likely to carry highly promiscuous MHC class I A (HLA-A) and MHC class II DRB1 (HLA-DRB1) alleles. The switch between specialist and generalist antigen presentation has occurred repeatedly and in a rapid manner during human evolution. Our work indicates that pathogen load maintains generalist adaptive immune recognition, with implications for medical genetics and epidemiology.
Distribution function of persistent current
Creators: name: Houzet, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We introduce a variant of the replica trick within the nonlinear sigma model that allows calculating the distribution function of the persistent current. In the diffusive regime, a Gaussian distribution is derived. This result holds in the presence of local interactions as well. Breakdown of the Gaussian statistics is predicted for the tails of the distribution function at large deviations.
Physical interpretation of frequency-modulation atomic force microscopy
Creators: name: Giessibl, Franz J.
name: Bielefeldt, Hartmut
Publisher: name: Universität Regensburg
Year: 2000
Subjects: subject: 530 Physik

description: Frequency modulation atomic force microscopy is a method for imaging the surface of metals, semiconductors and insulators in ultrahigh vacuum with true atomic resolution. The imaging signal in this technique is the frequency shift Δf of an oscillating cantilever with eigenfrequency f0, spring constant k and amplitude A, which is subject to tip-sample forces Fts. Here, we present analytical results of Δf(f0,k,A) for several basic classes of Fts. With these results, a method to calculate images is derived and demonstrated with an example.
The Arkansas Poll: October 2012
Creators: name: Politics, Diane D. Blair Center Of Southern
Publisher: name: Roper Center for Public Opinion Research
Year: 2023

description: Most pressing issue/problem facing people in Arkansas (3); quality of life (3); evaluation of public officials (5); statewide sales tax (1); medical use of marijuana (1); Medicaid expansion (2); access to in-state tuition (1); relationships between two people of the same sex (1); undocumented immigrants (1).
Local Spectroscopy and Atomic Imaging of Tunneling Current, Forces, and Dissipation on Graphite
Creators: name: Hembacher, Stefan
name: Giessibl, Franz J.
name: Mannhart, Jochen
name: Quate, Calvin F.
Publisher: name: Universität Regensburg
Year: 2005
Subjects: subject: 530 Physik
subject: 68.37.Ef
subject: 62.25.+g
subject: 81.05.Uw

description: Theory predicts that the currents in scanning tunneling microscopy (STM) and the attractive forces measured in atomic force microscopy (AFM) are directly related. Atomic images obtained in an attractive AFM mode should therefore be redundant because they should be similar to STM. Here, we show that while the distance dependence of current and force is similar for graphite, constant-height AFM and STM images differ substantially depending on the distance and bias voltage. We perform spectroscopy of the tunneling current, the frequency shift, and the damping signal at high-symmetry lattice sites of the graphite (0001) surface. The dissipation signal is about twice as sensitive to distance as the frequency shift, explained by the Prandtl-Tomlinson model of atomic friction.
Free Malcev algebra of rank three
Creators: name: Kornev, Alexandr
Publisher: name: arXiv
Year: 2011
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 17D10

description: We find a basis of the free Malcev algebra on three free generators over a field of characteristic zero. The specialty and semiprimity of this algebra are proved. In addition, we prove the decomposability of this algebra into subdirect sum of the free Lie algebra rank three and the free algebra of rank three of variety of Malcev algebras generated by a simple seven-dimensional Malcev algebra.
title: Информационно-коммуникационные технологии в туризме и гостеприимстве
Creators: name: ELS IPR BOOKS
Publisher: name: Санкт-Петербургский государственный университет промышленных технологий и дизайна
Year: 2024

description: Учебное пособие состоит из трех глав, обобщающих информацию на тему применения информационных технологий в сфере гостиничного и ресторанного бизнеса, опираясь на российский и международный опыт. В учебном пособие представлены дополненные авторами классификации информационных технологий в индустрии туризма и туристских веб-сайтов, рассмотрена роль сети Интернет в туристском бизнесе. Знание основных программных продуктов и технологий гостиничного предприятия, приемов и путей дистрибуции гостиничных и ресторанных услуг, характеристика которых дана в учебном пособии, призвано способствовать формированию соответствующих компетенций сотрудника сферы туризма. Предназначено для студентов учреждений среднего профессионального образования, обучающихся по специальностям «Туризм» и «Гостиничное дело», а также будет полезно для преподавателей учебных заведений туристского и гостиничного профиля.