cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cleavage of 1-Benzyltetrahydroisoquinolines to Secondary Amines via Urethanes
Creators: name: Kim, W.-J.
name: Lee, D.-U.
name: Wiegrebe, Wolfgang
Publisher: name: Universität Regensburg
Year: 1984
Subjects: subject: 540 Chemie

description: 2,2,2-Trichloroethyl chloroformate and benzyl chloroformate cleave 1-benzyl-1,2,3,4-tetrahydro- 2-methylisoquinolines of type 1 to yield tertiary stilbene urethanes of type 2 which are easily reduced or hydrogenolyzed to secondary amines. 6'-(Hydroxymethyl)-laudanosine (4) is converted by these reagents to the isochroman urethanes 11 and 12 which are split to yield the secondary amine 8 without the isochroman moiety being attacked. Chlorameisensäure-2,2,2-trichlorethylester bzw. Chlorameisensäurebenzylester spalten 1-Benzyl- l,2,3,4-tetrahydro-2-methylisochinoline vom Typ 1 zu tertiären Stilben-Urethanen vom Typ 2, die unter milden Bedingungen reduktiv bzw. hydrogenolytisch zu sekundären Aminen gespalten werden. 6'-Hydroxymethyllaudanosin (4) reagiert mit diesen Reagentien zu den Isochroman-Urethanen 11 bzw. 12, die ohne Angriff am Isochromanring zum sekundären Amin 8 umgesetzt werden.
title: The use of low molecular weight organic receptors for the development of novel detection, capture and remediation technologies.
Creators: name: Ellaby, Rebecca Jane
Publisher: name: University of Kent
Year: 2022

description: This thesis reports the synthesis of a series of organophosphorus and organosulfur molecules designed to mimic the hydrogen bond accepting capacity of the P=O moiety common within all organophosphorus chemical warfare agents. The association of these molecules towards a series of non-specific low molecular weight hydrogen bond donating receptors and their hydrolysis in the presence of a base is investigated. The development of predictive methodologies for both hydrogen bond accepting simulants and for the reactivity of these molecules for the development of novel detection and remediation technologies; through the combination of low-level computational modelling, experimentally derived values, and exhaustive parameter searches. Here, it is also shown how that association constants derived from these non-specific hydrogen bonded complexes can be used as a parameter within predictive models for simulant reactivity. Finally, this thesis also reports the synthesis of a series of hydrogen bond donor-acceptor amphiphilic salts and their co-formulation with a series of organic molecules. The self-associative and physical chemical properties of these compounds are investigated in the solid and solution state. The potential for these amphiphilic salts to uptake their co-formulants is also investigated to assess their potential as environmental pollutant capture agents.
Supplementary tables chapter 3
Creators: name: Wijaya
Publisher: name: Zenodo
Year: 2023

description: Supplementary table 1. Log2 fold change values of dose-response study Supplementary table 2. Log2 fold change values of temporal dynamics study Supplementary table 3. Module scores of dose-response study Supplementary table 4. Module scores of temporal dynamics study Supplementary table 5. Module memberships of the modules linked to the mechanisms of cisplatin induced DIKI (modules which are investigated in this study) Supplementary table 6. Nephron markers obtained from the previous study23
title: Essays on social networks in developing countries
Creators: name: Koo, Hyunhoi
Publisher: name: University of Kent
Year: 2022

description: Social networks can be vital in developing countries where institutions and markets are missing or incomplete. Social networks can supplement markets that are not suitable for people’s economic needs by sharing resources, shaping beliefs and transmitting information. This thesis studies social networks in developing countries, which is important to find effective approaches to deal with the problems. The first chapter examines the peer effects of religious groups on learning one’s own HIV status. This analysis is interesting because religion substantially affects the lives of people in sub-Saharan Africa and there could be peer effects within religious groups which drive behaviour including stigma. It is important to understand these in order to design policies to overcome stigma. I use exogenous variation from randomised incentives to learn test results in rural Malawi (Thornton, 2008) to address difficulties in disentangling peer effects from other effects. I find that the proportion of religious group learning their HIV results increases the probability of a group member’s finding out their HIV test results. The second chapter studies peer effects on subjective expectations of HIV. Subjective expectations significantly influence health behaviours and play a crucial role in health outcomes by inducing take-up of preventive health behaviours and avoidance of risky behaviours. I use data from Delavande and Kohler (2009) which collected subjective expectation on one’s own HIV status by easy visual methods in rural Malawi. The results show significant and positive peer effects on one’s own subjective likelihood of HIV infection. The third chapter explores the effect of rainfall shock on within-village extended family networks. Within-village extended family networks, and the interactions within these networks, play an important role in risk and resource sharing. The influences of rainfall shocks – measured as absolute deviation from long-term average – on the structure of within-village extended family networks in rural Mexico are examined. In villages where reduction in incomes is implied due to rainfall shocks, extended family networks have smaller degree and size. However, these negative effects are countervailed by cash transfers. Possible explanations for these results are the decrease of females leaving their households for marriage in control group and reduced work migration in treatment group with cash transfers. The findings in this thesis emphasise the importance of social networks in developing countries in terms of behaviour, belief and risk-sharing.
Constructions of Space: Exploring Photographic Images in Forest School
Creators: name: Garden, Ange
Publisher: name: PRISM: Casting New Light on Learning, Theory and Practice
Year: 2023

description: This research builds on the recently published paper (Garden, 2022c), which explored through interviews the use of iPads as cameras to enhance Forest School practice. Children’s perspectives of the Forest School space captured what was important to them on camera (Garden, 2022c). Working with the same group of 32 Key Stage 2 children selected from two UK primary schools, the research explored the images captured on iPad cameras during the follow-on session. The unstructured interviews explored the children’s feelings and meanings associated with the images captured in the Forest School space using Interpretive Phenomenological Analysis (IPA). The photographs can be understood within the themes of ‘play with technology’, ‘soft fascination’ and ‘place attachment’, all of which are inherent in the Forest School ethos. Suggestions for future research include reflections on the ways the capturing of images of Forest School can encourage peer collaboration whilst considering the relative influence of space.
description: PRISM: Casting New Light on Learning, Theory and Practice, Vol. 5 No. 1 (2023): General Issue
Universal flow-density relation of single-file bicycle, pedestrian and car motion
Creators: name: Zhang, Jun
name: Mehner, Wolfgang
name: Holl, Stefan
name: Boltes, Maik
name: Andresen, Erik
name: Schadschneider, Andreas
name: Seyfried, Armin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences

description: The relation between flow and density is an essential quantitative characteristic to describe the efficiency of traffic systems. We have performed experiments with single-file motion of bicycles and compare the results with previous studies for car and pedestrian motion in similar setups. In the space-time diagrams we observe three different states of motion (free flow state, jammed state and stop-and-go waves) in all these systems. Despite of their obvious differences they are described by a universal fundamental diagram after proper rescaling of space and time which takes into account the size and free velocity of the three kinds of agents. This indicates that the similarities between the systems go deeper than expected.
description: 5 pages, 5 figures
Power Profiling of Machine Learning Accelerators using MLPerf
Creators: name: Alge, Nikolas
Publisher: name: Zenodo
Year: 2022

description: There exists a vast amount of possibilities of hardware platforms and models when implementing a machine learning
 problem. In order to be able to choose the best approach, an estimator of important parameters like latency, power
 consumption and accuracy would be beneficial. To build such a tool, it is necessary to characterize hardware and models
 first. This is done in this work by reproducing the results of a study that examines the Google Coral USB Accelerator
 and the Intel Neural Compute Stick 2. Especially, the power consumption is looked at in more detail by using a sampling
 rate of 100kS/s. The findings include power profiles of the mentioned hardware accelerators executing MobileNetV1
 and Inception V1 by means of the MLPerf Inference benchmark. Additionally, the accuracy and latency are examined
 and the results are compared to the related study. Moreover, a measurement setup, including a USB dongle for simple
 and reliable data acquisition, is presented. A sampling rate of 500kS/s allows it to evaluate each individual layer of a
 model regarding power and latency during inference. The presented work serves as a basis for further investigations in
 the field of parameter estimation.
The heart of a combinatorial model category
Creators: name: Low, Zhen Lin
Publisher: name: arXiv
Year: 2014
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 18G55, 55U35 (Primary), 18D35, 55P60 (Secondary)

description: We show that every small model category that satisfies certain size conditions can be completed to yield a combinatorial model category, and conversely, every combinatorial model category arises in this way. We will also see that these constructions preserve right properness and compatibility with simplicial enrichment. Along the way, we establish some technical results on the index of accessibility of various constructions on accessible categories, which may be of independent interest.
description: 44 pages, LaTeX. v4: Extended version of final journal version. (Note that material has been significantly reorganised since v3.)
Editorial: General Issue - 2023
Creators: name: Hammond, Craig Andrew
name: Enriquez, Judith
name: Allan, David
Publisher: name: PRISM: Casting New Light on Learning, Theory and Practice
Year: 2023

description: This is the editorial article for the PRISM General Issue: Volume 5, Issue 1 (2023)
description: PRISM: Casting New Light on Learning, Theory and Practice, Vol. 5 No. 1 (2023): General Issue
Drei Synthesemöglichkeiten für C-9-14C-Dithranol
Creators: name: Müller, K.
name: Retzow, A.
name: Wiegrebe, Wolfgang
Publisher: name: Universität Regensburg
Year: 1984
Subjects: subject: 540 Chemie

description: Drei Synthesewege werden beschrieben, die die Verwendung von Phthalsäure (Friedel-Crafts-Acylierung), CH3 I (o-Metallierung nach Meyers), bzw. C 0 2 (o-Metallierung nach Seebach) als 14C-Quellen für C-9-14C-Dithranol ermöglichen. Three routes are described, which can be used to synthesize [9-14C]-Dithranol: incorporation of phthalic acid (Friedel-Crafts acylation), CH3 I (o-lithiation according to Meyers) or C 0 2 (o-lithiation according to Seebach) as 14C-sources.
Logics for complexity classes
Creators: name: Naidenko, Vladimir
Publisher: name: arXiv
Year: 2013
Subjects: subject: Computational Complexity (cs.CC)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.1.3; F.4.1
subject: 68Q19

description: A new syntactic characterization of problems complete via Turing reductions is presented. General canonical forms are developed in order to define such problems. One of these forms allows us to define complete problems on ordered structures, and another form to define them on unordered non-Aristotelian structures. Using the canonical forms, logics are developed for complete problems in various complexity classes. Evidence is shown that there cannot be any complete problem on Aristotelian structures for several complexity classes. Our approach is extended beyond complete problems. Using a similar form, a logic is developed to capture the complexity class $NP\cap coNP$ which very likely contains no complete problem.
description: This article has been accepted for publication in Logic Journal of IGPL Published by Oxford University Press; 23 pages, 2 figures
Escape Dynamics of Many Hard Disks
Creators: name: Taniguchi, Tooru
name: Murata, Hiroki
name: Sawada, Shin-ichi
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Many-particle effects in escapes of hard disks from a square box via a hole are discussed in a viewpoint of dynamical systems. Starting from $N$ disks in the box at the initial time, we calculate the probability $P_{n}(t)$ for at least $n$ disks to remain inside the box at time $t$ for $n=1,2,\cdots,N$. At early times the probabilities $P_{n}(t)$, $n=2,3,\cdots,N-1$, are described by superpositions of exponential decay functions. On the other hand, after a long time the probability $P_{n}(t)$ shows a power-law decay $\sim t^{-2n}$ for $n\neq 1$, in contrast to the fact that it decays with a different power law $\sim t^{-n}$ for cases without any disk-disk collision. Chaotic or non-chaotic properties of the escape systems are discussed by the dynamics of a finite time largest Lyapunov exponent, whose decay properties are related with those of the probability $P_{n}(t)$.
description: 14 pages, 11 figures
Dermal Absorption and Metabolism of the Antipsoriatic Drug Dithranol Triacetate
Creators: name: Wiegrebe, Wolfgang
name: Retzow, A.
name: Plumier, E.
name: Ersoy, Nagehan
name: Garbe, A.
name: Faro, H.-P.
name: Kunert, R.
Publisher: name: Universität Regensburg
Year: 1984
Subjects: subject: 540 Chemie

description: Die perkutane Resorption, die Ausscheidungskinetik und der Metabolismus von Dithranol-triacetat (2) wurden bei Wistar- Ratten untersucht. Durch die Verwendung zweier verschieden markierter Verbindungen - 3H im Anthracen-Teil und 1 4 C in den Acetat-Resten - konnte das Schicksal der verschiedenen Molekülteile verfolgt werden. Nach Injektion wird 2 in großem Umfang durch enzymatische Einwirkung in Acetat und Dithranol gespalten. Die desacetylierten Metaboliten verlieren zur Hälfte die 3H-Markierung unter Bildung von 3H20. Als Stoffwechselprodukte wurden nach iv. Injektion von 3H-2 im Urin l,8-Diacetoxy-9-anthron, 1 - Acetoxy- 8- hydroxy- 9- anthron, Dithranol, 1,8-Dihydroxy- 9,10-anthrachinon und dessen Diacetat gefunden. Bei der dermalen Verabreichung wird unverändertes 2 praktisch nicht resorbiert. Die in der Haut in vitro nachweisbaren Arylesterasen hydrolysieren jedoch 2 zu Dithranol, das unter einem Okklusiv-Verband bis zu 33% resorbiert wird. Dithranol- triacetat erweist damit seine Prodrug-Eigenschaften für die Psoriasis-Behandlung. Percutaneous absorption, excretion kinetics, and metabolism of dithranol triacetate (2) have been investigated in Wistar rats. By the use of two differently labelled molecules - 3H in the anthracene nucleus and 1 4 C in the acetoxy groups of 2, resp. - the fate of the different parts of the dithranol triacetate molecule could be followed. After injection, large amounts of 2 are cleaved under the influence of enzymes into acetate and dithranol. These deacetylated metabolites lose half their 3H label with formation of3H20. In urine, l,8-diacetoxy-9-anthrone, 1-acetoxy-8-hydroxy-9- anthrone, l,8-dihydroxy-9,10-anthraquinone and its diacetate were found as metabolites. After dermal application, unchanged 2 is practically not absorbed at all. Arylesterases which, according to in vitro studies, are present in or on the skin, hydrolyse dithranol triacetate to give free dithranol. Up to 33% of the latter are absorbed from under an occlusive dressing. Dithranol triacetate, therefore, shows pro-drug characteristics for the treatment of psoriasis.
Confronting the threat of PMT/vPvM substances to protect water resources
Creators: name: Arp, Hans Peter H.
Publisher: name: Zenodo
Year: 2022
Subjects: PFAS
water
PMT
vPvM
CLP
REACH

description: Water worldwide is becoming increasingly contaminated with substances considered persistent, mobile and toxic (PMT) or very persistent and very mobile (vPvM). PMT/vPvM substances are those which do not breakdown easily in the environment (persistent), are transported relatively rapidly through soil and groundwater (mobile) and are in some cases toxic. Their accumulation in freshwater resources is increasingly putting drinking water resources under a new type of stress. Their irreversible accumulation in the environment allows them to fulfil the criteria of a planetary boundary threat. Well known examples include melamine, 1,4-dioxane, trifluoroacetate and several PFAS, but there are many more, including a large portion of transformation products that remain unidentified. Advanced water treatment methods like ozonolysis or activated carbon filtration are often ineffective, forcing some water producers to invest in nanofiltration and reverse osmosis. Industry, regulators, academia, and the water sector are now taking action to reduce pollution from PMT/vPvM substances. A focal point of this action is the European Union’s Green Deal, particularly its Chemicals Strategy for Sustainability towards a Toxic Free Environment and its Zero Pollution ambition. Building off an initiative by the German Environment Agency (UBA), new hazard classes for PMT/vPvM substances are currently being implemented in two of the main European chemical regulations, CLP and REACH. The presentation will be divided into three parts, showing 1) the history of the increasing menace of PMT/vPvM substance contamination; 2) the regulatory developments related to defining PMT/vPvM substances; 3) how to confront and minimize the threat of PMT/vPvM substances. The presentation will focus on how industry, regulators, academia and the water sector can work together towards zero pollution of PMT/vPvM substances, ensuring safe, sustainable and clean water resources for future generations.
Genes associated with Alzheimer's multimorbidities for functional pathway analysis
Creators: name: Salie, Mariam
Publisher: name: figshare
Year: 2022
Subjects: Biological network analysis
Gene expression (incl. microarray and other genome-wide approaches)

description: This is a dataset of the genes associated with complex traits identified as multimorbidities of Alzheimer's disease. These genes were used for functional pathway analysis to identify enriched biological pathways.
Axion Monodromy Inflation on Warped Throats
Creators: name: Franco, Sebastian
name: Galloni, Daniele
name: Retolaza, Ander
name: Uranga, Angel
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent models of axion monodromy inflation in string theory link the inflationary potential and the moduli stabilization potential. Realistic inflationary models require mechanisms to moderately suppress the inflaton mass with respect to the moduli stabilization scale. In this paper we explore the realization of this idea using warped throats, whose redshifted infrared region supports the inflaton mode. The inflaton potential and its monodromy arise from couplings to the fluxes supporting the throat. We provide explicit realizations of such throats in type IIB with NSNS and RR 3-form field strength fluxes, and in type IIA with RR 2-form fluxes. Once embedded in a global CY, these systems would provide a mechanism to realize chaotic inflation at scales parametrically suppressed with respect to bulk physics. The construction of the throats is systematically carried out using geometric transitions in systems of D-branes at singularities, whose properties and dynamics are efficiently encoded using dimer diagrams. The holographic dual of the axion monodromy is a quasi-periodic chain of Seiberg dualities.
description: 39 pages, 18 figures. v3: version published in JHEP with references added
Improving joint probability reasoning
Creators: name: Stegmüller, Nathalie
name: Binder, Karin
name: Wiesner, Patrick
Publisher: name: Universität Regensburg
Year: 2022
Subjects: subject: 510 Mathematik

description: In S. A. Peters, L. Zapata-Cardona, F. Bonafini, & A. Fan (Eds.), Bridging the Gap: Empowering & Educating Today’s Learners in Statistics. Proceedings of the 11th International Conference on Teaching Statistics (ICOTS11 2022), Rosario, Argentina
Scalable detection of statistically significant communities and hierarchies, using message-passing for modularity
Creators: name: Zhang, Pan
name: Moore, Cristopher
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: Machine Learning (stat.ML)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Modularity is a popular measure of community structure. However, maximizing the modularity can lead to many competing partitions, with almost the same modularity, that are poorly correlated with each other. It can also produce illusory "communities" in random graphs where none exist. We address this problem by using the modularity as a Hamiltonian at finite temperature, and using an efficient Belief Propagation algorithm to obtain the consensus of many partitions with high modularity, rather than looking for a single partition that maximizes it. We show analytically and numerically that the proposed algorithm works all the way down to the detectability transition in networks generated by the stochastic block model. It also performs well on real-world networks, revealing large communities in some networks where previous work has claimed no communities exist. Finally we show that by applying our algorithm recursively, subdividing communities until no statistically-significant subcommunities can be found, we can detect hierarchical structure in real-world networks more efficiently than previous methods.
Superoscillations underlying remote state preparation for relativistic fields
Creators: name: Ber, Ran
name: Kenneth, Oded
name: Reznik, Benni
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a physical (gedanken) implementation of a generalized remote state preparation of relativistic quantum field states for an arbitrary set of observers. The prepared states are created in regions that are outside the future light-cone of the generating region. The mechanism, which is based on utilizing the vacuum state of a relativistic quantum field as a resource, sheds light on the well known Reeh-Schlieder theorem, indicating its strong connection with the mathematical phenomenon of superoscillations.
description: 9 pages, 5 figures
Untersuchungen zum Mechanismus der Bischler-Napieralski-Reaktion
Creators: name: Berger, U.
name: Dannhardt, G.
name: Wiegrebe, Wolfgang
Publisher: name: Universität Regensburg
Year: 1983
Subjects: subject: 540 Chemie

description: Das Imidchlorid 3 und sein Hydrochlorid 2 liegen nach 1H- und 13C-NMR-spektroskopischen Untersuchungen als E(syn)- und Z(anti)-Isomerengemische vor; die Gleichgewichtseinstellung zum stabilen Z(anti)-Isomer 2b läßt sich 1H-NMR-spektroskopisch verfolgen. Bei der Umsetzung von 1 mit POCl3 wird das Chlorophosphat 9 isoliert. Die Bedeutung der Gegenionen von 2 bzw. 9 für die Cyclisierung bei der Bischler-Napieralski-Reaktion wird diskutiert. According to 1H- and 1 3C-NMR spectroscopic measurements the imidoyl chloride 3 and its hydrochloride 2 are mixtures of the E(syn) and Z(anti) isomers. Equilibration to the more stable isomer can be followed by NMR spectroscopy. The reaction of 1 with POCl3 leads to the chlorophosphate 9. The relevance of the counter ions of 2 and 9, for the cyclisation in the Bischler-Napieralski reaction is discussed.
3-Phenylisochromans and 2-Phenylbenzofurans from 1-Benzyltetrahydroisoquinolines: Tertiary Alcohol- and Phenol-Groups as Nucleophiles
Creators: name: Ambros, R.
name: Prior, S.
name: Wiegrebe, Wolfgang
Publisher: name: Universität Regensburg
Year: 1983
Subjects: subject: Ethyl chloroformate, 3-phenylisochromans, 2-phenylbenzofurans, intramolecular nucleophilic substitution
subject: 540 Chemie

description: Ethyl chloroformate (ECF) and the 1-benzyl-tetrahydroisoquinoline with a a-hydroxy-amethylethyl- group at C-2' 5 react to a 1,1-dimethyl-3-phenylisochroman 6. Under identical conditions the C-2'-OH-substituted 1-benzyl-tetrahydroisoquinoline 7 affords the stilbene 13 and a 2-phenylbenzofuran 14. Chlorameisensäureethylester und das 1-Benzyl-tetrahydroisochinolin mit einer a- Hydroxy-a-methylethyl-Gruppe an C-2' (5) reagieren zu einem 1,1 -Dimethyl-3-phenylisochroman 6. Unter gleichen Bedingungen bilden sich aus dem C-2'-OH-substituierten 1-Benzyltetrahydroisochinolin 7 das Stilben 13 und das 2-Phenylbenzofuran 14.
Rough path recursions and diffusion approximations
Creators: name: Kelly, David
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this article, we consider diffusion approximations for a general class of stochastic recursions. Such recursions arise as models for population growth, genetics, financial securities, multiplicative time series, numerical schemes and MCMC algorithms. We make no particular probabilistic assumptions on the type of noise appearing in these recursions. Thus, our technique is well suited to recursions where the noise sequence is not a semi-martingale, even though the limiting noise may be. Our main theorem assumes a weak limit theorem on the noise process appearing in the random recursions and lifts it to diffusion approximation for the recursion itself. To achieve this, we approximate the recursion (pathwise) by the solution to a stochastic equation driven by piecewise smooth paths; this can be thought of as a pathwise version of backward error analysis for SDEs. We then identify the limit of this stochastic equation, and hence the original recursion, using tools from rough path theory. We provide several examples of diffusion approximations, both new and old, to illustrate this technique.
description: Published at http://dx.doi.org/10.1214/15-AAP1096 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
NWM GWR code and data.rar
Creators: name: He, Jingyi
name: Wei, Ye
name: Yu, Bailang
Publisher: name: figshare
Year: 2023
Subjects: Geoinformatics not elsewhere classified
Urban geography

description: Geographically weighted regression (GWR) is a classical modeling method for dealing with spatial non-stationarity. It incorporates the distance decay effect in space to fit local regression models, where distance is defined as Euclidean distance. Although this definition has been expanded, it remains focused on physical distance. However, in the era of globalization and informatization, where the phenomenon of remotely close association is common, physical distance may not reflect real spatial proximity, and GWR based on physical distance has clear limitations. This paper proposes a geographically weighted regression based on a network weight matrix (NWM GWR) model. This does not rely on geographical location modeling; instead, it uses network distance to measure the proximity between two regions and weights observations by improving the kernel function to achieve distance attenuation. We adopt the population mobility network to establish a network weight matrix, modeling China’s urbanization and its multidimensional driving factors using network autocorrelation and NWM GWR methods. Results show that the NWM GWR model has more accurate fit and better stability than ordinary least squares and GWR models, and better reveals relationships between variables, which makes it suitable for modeling economic and social systems more broadly.
Investigation of III-V Nanowires by Plan-View Transmission Electron Microscopy: InN Case Study
Creators: name: Luna, E
name: Grandal, J
name: Gallardo, E
name: Calleja, J M
name: Sánchez-García, M A
name: Calleja, E
name: Trampert, A
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We discuss observations of InN nanowires (NWs) by plan-view high-resolution transmission electron microscopy (TEM). The main difficulties arise from suitable methods available for plan-view specimen preparation. We explore different approaches and find that the best results are obtained using a refined preparation method based on the conventional procedure for plan-view TEM of thin films, specifically modified for the NW morphology. The fundamental aspects of such a preparation are the initial mechanical stabilization of the NWs and the minimization of the ion-milling process after dimpling the samples until perforation. The combined analysis by plan-view and cross-sectional TEM of the NWs allows determination of the degree of strain relaxation and reveals the formation of an unintentional shell layer (2-3 nm thick) around the InN NWs. The shell layer is composed of bcc-In2O3 nanocrystals with a preferred orientation with respect to the wurtzite InN: In2O3 [111] || InN [0001] and In2O3 <110> || InN <11-20>.
Explicit Hamiltonians Inducing Volume Law for Entanglement Entropy in Fermionic Lattices
Creators: name: Gori, Giacomo
name: Paganelli, Simone
name: Sharma, Auditya
name: Sodano, Pasquale
name: Trombettoni, Andrea
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show how the area law for the entanglement entropy may be violated by free fermions on a lattice and look for conditions leading to the emergence of a volume law. We give an explicit construction of the states with maximal entanglement entropy based on the fact that, once a bipartition of the lattice in two complementary sets $A$ and $\bar{A}$ is given, the states with maximal entanglement entropy (volume law) may be factored into Bell-pairs (BP) formed by two states with support on $A$ and $\bar{A}$. We then exhibit, for translational invariant fermionic systems on a lattice, an Hamiltonian whose ground state is such to yield an exact volume law. As expected, the corresponding Fermi surface has a fractal topology. We also provide some examples of fermionic models for which the ground state may have an entanglement entropy $S_A$ between the area and the volume law, building an explicit example of a one-dimensional free fermion model where $S_A (L) \propto L^β$ with $β$ being intermediate between $β= 0$ (area law) and $β= 1$ (BP-state inducing volume law). For this model, the dispersion relation has a "zig-zag" structure leading to a fractal Fermi surface whose counting box dimension equals, for large lattices, $β$. Our analysis clearly relates the violation of the area law for the entanglement entropy of the ground state to the emergence of a non-trivial topology of the Fermi surface.
Jörn Keck, Dimitri Vanoverbeke, Franz Waldenberger (Hgg.): EU-Japan Relations, 1970-2012
Creators: name: Rövekamp, Frank
Publisher: name: ASIEN: The German Journal on Contemporary Asia
Year: 2022

description: ASIEN: The German Journal on Contemporary Asia, Nr. 134 (2015): ASIEN (Januar)
Boran-Addukte des Narkotins und Hydrastins und ihrer Reduktionsprodukte
Creators: name: Prior, S.
name: Wiegrebe, Wolfgang
Publisher: name: Universität Regensburg
Year: 1983
Subjects: subject: 540 Chemie

description: α-Narkotin (3), ß-Hydrastin (6) und ihre Reduktionsprodukte binden Boran koordinativ am Stickstoff. - Aus α-Narkotindiol (8) entsteht mit K-tert. butylat/Benzophenon nicht α-Anhydronarkotindiol7), sondern eine Quettamin-ähnliche Verbindung 9 ohne Racemisierung am Benzyl-C. α-Narcotine (3), ß-Hydrastine (6) and their reduction products bind B H 3 coordinatively at the N atom. α-Narcotinediol (8) when treated with potassium tert.butylate and benzophenone does not yield α-anhydronarcotinediol7) but leads to a quettamine-like compound 9 without racemisation at the benzyl C atom.
The impact of reading devices on affective and cognitive responses to fiction and non-fiction reading
Creators: name: Alexandri, Nikoletta
Publisher: name: Lancaster University
Year: 2023

description: The belief that fiction reading can improve empathy has been prevalent in recent years, and research has provided arguments and evidence in favour of this belief (e.g., Mumper & Gerrig, 2017; Nussbaum, 2010). The emergence of screen interfaces, together with an increase in audiobook consumption, have raised questions about the potential effects of reading devices on readers’ experience. To understand the association between empathy and fiction reading, as well as the impact of reading devices, the first chapter provides a literature review, exploring the notion of empathy, the association between empathy and reading, and presents empirical evidence from previous studies. It also addresses the phenomena of absorption and narrative comprehension and their role in readers’ empathy. Then the literature review examines the role of the reading medium. It reviews existing literature on the differences between print and screen interfaces in reading processes as well as the differences between LCD and e-ink screen technologies. It closes by reviewing studies comparing the audiobook with the print reading experience. The second chapter reports an empirical study conducted as part of this thesis, exploring the effect of literary reading on empathy, shedding light on the effects of fictionality and reading devices (print, e-reader, tablet, and audiobook). The third chapter reports a novel empirical study examining the effect of fictionality and reading devices on absorption, while it also investigates the role of absorption in readers’ empathy. The fourth chapter is an empirical study that tests the effects of fictionality and reading medium on comprehension, and the role of comprehension in readers’ empathy and absorption. The last chapter discusses the contribution of the presented results, noting that literary reading can decrease empathy, that fictionality affects this impact, the lack of differences between screen and print interfaces and the distinctiveness of the audiobook reading experience.
A limit theorem at the spectral edge for corners of time-dependent Wigner matrices
Creators: name: Sodin, Sasha
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: For the eigenvalues of principal submatrices of stochastically evolving Wigner matrices, we construct and study the edge scaling limit: a random decreasing sequence of continuous functions of two variables, which at every point has the distribution of the Airy point process. The analysis is based on the methods developed by Soshnikov to study the extreme eigenvalues of a single Wigner matrix.
description: 37 pages; v2: revised the presentation and fixed lapses; v3: added minor clarifications
Quantum reservoir computing in finite dimensions
Creators: name: Martínez-Peña, Rodrigo
name: Ortega, Juan-Pablo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Most existing results in the analysis of quantum reservoir computing (QRC) systems with classical inputs have been obtained using the density matrix formalism. This paper shows that alternative representations can provide better insights when dealing with design and assessment questions. More explicitly, system isomorphisms are established that unify the density matrix approach to QRC with the representation in the space of observables using Bloch vectors associated with Gell-Mann bases. It is shown that these vector representations yield state-affine systems (SAS) previously introduced in the classical reservoir computing literature and for which numerous theoretical results have been established. This connection is used to show that various statements in relation to the fading memory (FMP) and the echo state (ESP) properties are independent of the representation, and also to shed some light on fundamental questions in QRC theory in finite dimensions. In particular, a necessary and sufficient condition for the ESP and FMP to hold is formulated using standard hypotheses, and contractive quantum channels that have exclusively trivial semi-infinite solutions are characterized in terms of the existence of input-independent fixed points.
description: 19 pages, 4 figures
On excesses of frames
Creators: name: Bakić, Damir
name: Berić, Tomislav
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 42C15

description: We show that any two frames in a separable Hilbert space that are dual to each other have the same excess. Some new relations for the analysis resp. synthesis operators of dual frames are also derived. We then prove that pseudo-dual frames and, in particular, approximately dual frames have the same excess. We also discuss various results on frames in which excesses of frames play an important role.
description: 12 pages
Qualitätsaspekte der Wikipedia
Creators: name: Hammwöhner, Rainer
Publisher: name: Universität Regensburg
Year: 2007
Subjects: subject: 020 Bibliotheks- und Informationswissenschaft

description: Eine kritische Diskussion über ihre Verlässlichkeit begleitet die Entwicklung der Wikipedia von Beginn an. Mittlerweile liegen einige Publikationen vor, die sich mit der Qualität dieser neuen Enzyklopädie befassen. In diesem Betrag wird ein kurzer Überblick über mehrere dieser Arbeiten gegeben. Anschließend werden zwei eigene Studien vorgestellt, die sich mit Qualitätsaspekten befassen, die bisher weniger berücksichtigt wurden. In der ersten Studie wird die Abdeckung eines gut umgrenzten Themenkomplexes – Shakespeare’s Werk – in mehreren Wikipedias untersucht. Die zweite Studie befasst sich mit der Qualität der Wissensorganisation in der Wikipedia.
description: online-Zeitschrift; Band ist Sonderausgabe unter dem Titel "Wikis - Diskurse, Theorien und Anwendungen" hg. von Stegbauer, Christian/Schmidt, Jan/Schönberger, Klaus.
"Hall effect" for neutrons scattered by an A phase MnSi crystal
Creators: name: Udalov, O. G.
name: Fraerman, A. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study a neutron diffraction by A phase of MnSi using a dynamical theory of diffraction and three wave approximation. We show that the neutron diffraction is asymmetrical with respect to an incident plane. The asymmetry depends on a sign of an external magnetic field. This phenomenon can be considered as the Hall effect for neutrons.
description: 6 pages, 5 figures
PETase - Molecule of the Month December 2020 [Archived version]
Creators: name: Guard, Laurie
Publisher: name: figshare
Year: 2020
Subjects: subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences

description: This is the Molecule of the Month entry for December 2020 about PETase. It is a pdf archive version of the HTML webpage.
ПРОМЕЖУТОЧНОЕ ПОНЯТИЕ (ЛОГИЧЕСКИЙ ЦЕНТР) КАК ОДИН ИЗ ВИДОВ СЕМАНТИЧЕСКОЙ КЛАССИФИКАЦИИ АНТОНИМОВ (КОНТРАРНАЯ ПРОТИВОПОЛОЖНОСТЬ)
Creators: name: Хакимова, Фотима
Publisher: name: Zenodo
Year: 2024

description: В тезисе рассматривается семантическая классификация антонимов в русском и узбекском языках с акцентом на промежуточные понятия между противоположностями. Анализируются работы таких ученых, как Р.Шукуров, С.Усмонов, М.Р.Львов, Д.Н.Шмелев и другие, которые предлагают свои взгляды на семантические отношения противоположностей.
Fractional fundamental lemma and fractional integration by parts formula -- Applications to critical points of Bolza functionals and to linear boundary value problems
Creators: name: Bourdin, Loïc
name: Idczak, Dariusz
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 26A33, 49K99, 70H03

description: In the first part of the paper, we prove a fractional fundamental (du Bois-Reymond) lemma and a fractional variant of the integration by parts formula. The proof of the second result is based on an integral representation of functions possessing Riemann-Liouville fractional derivatives, derived in this paper too. In the second part of the paper, we use the previous results to give necessary optimality conditions of Euler-Lagrange type (with boundary conditions) for fractional Bolza functionals and to prove an existence result for solutions of linear fractional boundary value problems. In the last case we use a Hilbert structure and the Stampacchia theorem.
description: This is a preprint of a paper whose final and definite form is published in Advances in Differential Equations
Origin of Polar Distortion in LiNbO3-type "Ferroelectric" Metals: Role of A-site Instability and Short-Range Interactions
Creators: name: Xiang, Hongjun
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Since conduction electrons of a metal screen effectively the local electric dipole moments, it was widely believed that the ferroelectric-like distortion cannot occur in metals. Recently, metallic LiOsO3, was discovered to be the first clear-cut example of an Anderson-Blount "ferroelectric" metal, which at 140 K undergoes a ferroelectric-like structural transition similar to insulating LiNbO3. This is very surprising because the mechanisms for structural phase transitions are usually quite distinct in metals and insulators. Through performing first principles calculations, here we reveal that the local polar distortion in LiOsO3 is solely due to the instability of the A-site Li atom, in contrast to the LiNbO3 case where the second order Jahn-Teller effect of the B-site Nb ion also plays an additional role. More importantly, the "ferroelectric"-like long range order of the local polar distortion is found to be due to the predominantly ferroelectric short-range pair interactions between the local polar modes which are not screened by conduction electrons. Furthermore, we predict that LiNbO3-type MgReO3 is also a "ferroelectric" metal, but with a much higher structural transition temperature by 391 K than LiOsO3. Our work not only unravels the origin of FE-like distortion in LiNbO3-type "ferroelectric" metals, but also provides clue for designing other multi-functional "ferroelectric" metals.
Offene Hypertextsysteme. Das Konstanzer Hypertextsystem (KHS) im wissenschaftlichen und technischen Kontext
Creators: name: Hammwöhner, Rainer
Publisher: name: Universität Regensburg
Year: 1997
Subjects: subject: 020 Bibliotheks- und Informationswissenschaft

description: Zugl.: Konstanz, Univ., Habil.-Schr., 1997
Multi-messenger model for the prompt emission from GRB 221009A
Creators: name: Rudolph, Annika
name: Petropoulou, Maria
name: Winter, Walter
name: Bošnjak, Željka
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a multi-messenger model for the prompt emission from GRB 221009A within the internal shock scenario. We consider the time-dependent evolution of the outflow with its impact on the observed light curve from multiple collisions, and the self-consistent generation of the electromagnetic spectrum in synchrotron and inverse Compton-dominated scenarios. Our leptohadronic model includes UHE protons potentially accelerated in the outflow, and their feedback on spectral energy distribution and on the neutrino emission. We find that we can roughly reproduce the observed light curves with an engine with varying ejection velocity of ultra-relativistic material, which has an intermediate quiescent period of about 200 seconds and a variability timescale of $\sim1$~s. We consider baryonic loadings of 3 and 30 that are compatible with the hypothesis that the highest-energetic LHAASO photons might come from UHECR interactions with the extragalactic background light, and the paradigm that energetic GRBs may power the UHECR flux. For these values and the high dissipation radii considered we find consistency with the non-observation of neutrinos and no significant signatures on the electromagnetic spectrum. Inverse Compton-dominated scenarios from the prompt emission are demonstrated to lead to about an order of magnitude higher fluxes in the HE-range; this enhancement is testable by its spectral impact in the Fermi-GBM and LAT ranges.
EDINOBORSTVA
Creators: name: Kharkiv State Academy Of Physical Culture
Publisher: name: Zenodo
Year: 2019

description: The collection contains articles on the organization of training process in institutions of higher education, sports schools; improvement of training of athletes in modern conditions; I will become physical, techno-tactical and psychological preparedness of athletes; the effectiveness of competitive indicators; organization of patriotic education of youth of Ukraine in the process of martial arts exercises; perfection of the process of physical education of students using martial arts.

For graduate students, doctoral students, masters, trainers, athletes, teachers of educational institutions, teachers of secondary schools.
Sine-Square Deformation and its Relevance to String Theory
Creators: name: Tada, Tsukasa
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Sine-square deformation, a recently found modulation of the coupling strength in certain statistical models, is discussed in the context of two-dimensional conformal field theories, with particular attention to open/closed string duality. This deformation is shown to be non-trivial and leads to a divergence in the worldsheet metric. The structure of the vacua of the deformed theory is also investigated. The approach advocated here may provide an understanding of string duality through the worldsheet dynamics.
description: 15 pages, 4 figures
8 Tips for Using Metrics in Research Evaluation
Creators: name: Gutzman, Karen E
name: Smith, Patty Lauren
name: Holmes, Kristi
Publisher: name: Galter Health Science Library & Learning Center
Year: 2018

description: This presentation was given as part of the Medical Library Association Webinar series on Wednesday, November 29, 2017 from 1:00 - 2:30 pm (Central Time).
Jahrestagung des Arbeitskreises Südostasien in der Deutschen Gesellschaft für Geographie (DGfG)
Creators: name: Peters, Gerrit
name: Kraas, Frauke
name: Diez, Javier Revilla
Publisher: name: ASIEN: The German Journal on Contemporary Asia
Year: 2022

description: ASIEN: The German Journal on Contemporary Asia, Nr. 134 (2015): ASIEN (Januar)