cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On false discovery rate thresholding for classification under sparsity
Creators: name: Neuvial, Pierre
name: Roquain, Etienne
Publisher: name: arXiv
Year: 2011
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We study the properties of false discovery rate (FDR) thresholding, viewed as a classification procedure. The "0"-class (null) is assumed to have a known density while the "1"-class (alternative) is obtained from the "0"-class either by translation or by scaling. Furthermore, the "1"-class is assumed to have a small number of elements w.r.t. the "0"-class (sparsity). We focus on densities of the Subbotin family, including Gaussian and Laplace models. Nonasymptotic oracle inequalities are derived for the excess risk of FDR thresholding. These inequalities lead to explicit rates of convergence of the excess risk to zero, as the number m of items to be classified tends to infinity and in a regime where the power of the Bayes rule is away from 0 and 1. Moreover, these theoretical investigations suggest an explicit choice for the target level $α_m$ of FDR thresholding, as a function of m. Our oracle inequalities show theoretically that the resulting FDR thresholding adapts to the unknown sparsity regime contained in the data. This property is illustrated with numerical experiments.
The origin of fiscal rules
Creators: name: Doray-Demers, Pascal
Publisher: name: University of British Columbia
Year: 2017

description: Austerity is one of the most controversial policies in Europe. Fiscal rules are a key political institution that entrench austerity as a permanent feature of government budgetary policy. These rules fix numerical targets to constrain government budgets under the assumption that, in the long run, this might help to prevent fiscal crisis. In the last 30 years, the number of countries using fiscal rules has exploded. This thesis studies the political process leading to the creation of fiscal rules. Contrary to previous research, this thesis considers explanations coming both from national and international politics. It is composed of three articles. The first uses time series analysis in a European panel to arbitrate between different mechanisms that could lead political actors to adopt fiscal rules. It finds that fiscal rules are strengthened when countries are facing fiscal stress over an extended period or when governments are in a position of relative weakness toward European institutions. The latter result suggests that fiscal rules might diffuse through coercive diplomacy. The second paper uses a process tracing approach to test the possibility that the creation of fiscal rules is driven by the coercive diplomacy of the IMF and the EU. Our conclusion is that the coercive diplomacy of these two actors explains a large proportion of all fiscal rules existing in the world today. The final paper takes this result and compares the impact of fiscal rules on debt and bond yields between those that are externally-coerced and those that are nationally-driven. The conclusion is that externally-coerced fiscal rules do not help to control government debt and favour fiscal gimmickry. The main conclusion of the thesis is that a large fraction of fiscal rules are the result of coercive diplomacy and that these rules are less efficient than those which result from national politics.
Global well-posedness and scattering for the defocusing, $L^{2}$-critical, nonlinear Schr{ö}dinger equation when $d = 2$
Creators: name: Dodson, Benjamin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35Q55

description: In this paper we prove that the defocusing, cubic nonlinear Schr{ö}dinger initial value problem is globally well-posed and scattering for $u_{0} \in L^{2}(\mathbf{R}^{2})$. To do this, we will prove a frequency localized interaction Morawetz estimate similar to the estimate made in \cite{CKSTT4}. Since we are considering an $L^{2}$ - critical initial value problem we will localize to low frequencies.
description: 75 pages
Wie interagieren Nutzer mit Text- und Bildinformationen in einem Wikipedia-Artikel?
Creators: name: Rösch, Barbara
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Text; Figure; Reading; Case study; User analysis; Wikipedia
subject: 004 Informatik

description: The PhD project explores the design of textual and pictorial elements in selected Wikipedia articles and their influence on users’ information behaviour. Eye-tracking experiments, questionnaires and knowledge tests are conducted to get insights into users’ behaviour. The aim is to detect correlations between the reception of text/images and different parameters like learning style, prior knowledge and subject of study.
Black p-Branes versus black holes in non-asymptotically flat Einstein-Yang-Mills theory
Creators: name: Mazharimousavi, S. Habib
name: Halilsoy, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a class of non-asymptotically flat (NAF) charged black p-branes (BpB) with p-compact dimensions in higher dimensional Einstein-Yang-Mills theory. Asymptotically the NAF structure manifests itself as an anti-de-sitter spacetime. We determine the total mass / energy enclosed in a thin-shell located outside the event horizon. By comparing the entropies of BpB with those of black holes in same dimensions we derive transition criteria between the two types of black objects. Given certain conditions satisfied our analysis shows that BpB can be considered excited states of black holes. An event horizon $r_{+}$ versus charge square $Q^{2}$ plot \ for the BpB reveals such a transition where $r_{+}$ is related to the horizon radius $r_{h}$ of the black hole (BH) both with the common charge $% Q. $
description: 10 pages, 1 figure, updated version. Final version to be published in EPJP
Understanding the Complexities of Email Behaviour
Creators: name: Elsweiler, David
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: information behaviour; empirical study
subject: 004 Informatik

description: This position statement summarises three studies from a project aiming to learn about and support email search behaviour. The findings combine to form a rich and multifaceted picture of user behaviour and demonstrate why it is important to account for user behaviour at all stages of an Information Science project.
The joint distribution of stock returns is not elliptical
Creators: name: Chicheportiche, Rémy
name: Bouchaud, Jean-Philippe
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Finance (q-fin.ST)
subject: FOS: Economics and business

description: Using a large set of daily US and Japanese stock returns, we test in detail the relevance of Student models, and of more general elliptical models, for describing the joint distribution of returns. We find that while Student copulas provide a good approximation for strongly correlated pairs of stocks, systematic discrepancies appear as the linear correlation between stocks decreases, that rule out all elliptical models. Intuitively, the failure of elliptical models can be traced to the inadequacy of the assumption of a single volatility mode for all stocks. We suggest several ideas of methodological interest to efficiently visualise and compare different copulas. We identify the rescaled difference with the Gaussian copula and the central value of the copula as strongly discriminating observables. We insist on the need to shun away from formal choices of copulas with no financial interpretation.
description: 12 figures
Perturbation Analysis of Orthogonal Matching Pursuit
Creators: name: Ding, Jie
name: Chen, Laming
name: Gu, Yuantao
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Orthogonal Matching Pursuit (OMP) is a canonical greedy pursuit algorithm for sparse approximation. Previous studies of OMP have mainly considered the exact recovery of a sparse signal $\bm x$ through $\bm Φ$ and $\bm y=\bm Φ\bm x$, where $\bm Φ$ is a matrix with more columns than rows. In this paper, based on Restricted Isometry Property (RIP), the performance of OMP is analyzed under general perturbations, which means both $\bm y$ and $\bm Φ$ are perturbed. Though exact recovery of an almost sparse signal $\bm x$ is no longer feasible, the main contribution reveals that the exact recovery of the locations of $k$ largest magnitude entries of $\bm x$ can be guaranteed under reasonable conditions. The error between $\bm x$ and solution of OMP is also estimated. It is also demonstrated that the sufficient condition is rather tight by constructing an example. When $\bm x$ is strong-decaying, it is proved that the sufficient conditions can be relaxed, and the locations can even be recovered in the order of the entries' magnitude.
description: 29 pages
Lampaat metsänhoitajina: laiduntavat lampaat nuoressa metsässä - Sheep as forest managers – Management of young forest stands by grazing sheep
Creators: name: Den Herder
name: Michael; Amaral Paulo
name: J.
Publisher: name: Zenodo
Year: 2019
Subjects: silvopastoralism
stocking rate
spruce
deciduous species
maisemalaidunta
perinnemaisema
harvennushakku
lampaat
laidunta
metsälaidun
kuusimetsä
lehtipuu
eläintiheys

description: Lampaita käytetään usein maisemalaiduntamisessa ja –suojelussa, kuten esimerkiksi perinnemaisemien ja –biotooppien ylläpidossa, mutta ne voivat toimia myös modernin metsätalouden palveluksessa. Hoitometsää harvennetaan 10-20 vuoden kuluttua taimikon istuttamisesta. Näistä harvennushakkuista ei yleensä saa voittoa, mutta toimet parantavat metsän kasvua. Varhaisia harvennushakkuita ei aina tehdä koska ne tulevat kalliiksi omistajalle ja sijoitus maksaa itsensä takaisin vasta pitkän ajan kuluttua. Laiduntavat lampaat voivat säästää metsänhoitokuluissa ja tuoda samalla myös muita hyötyjä.  Lampaat voivat laiduntaa jopa melko nuorissa kuusi-, mänty- ja sekametsissä. Täten maanviljelijä tai metsänomistaja voi jättää taimikonhoidon tai ensiharvennukset myöhempään ja säästää metsänhoitokuluissa. - Sheep are often used in landscape management and conservation, for example for preserving the open structure of traditional rural landscapes and biotopes. However, sheep can even be set to work in modern-day commercial forest management. In forest management, most stands need tending or pre-commercial thinning 10-20 years after stand establishment. These early forest operations usually do not give any financial return to the forest owner but they do improve the future growing conditions for the remaining trees. However, often these early thinning operations are neglected because they are expensive and the forest owner has to wait many years before he or she can see the benefit of the investment. Sheep grazing can save costs on early thinning operations while providing at the same time many other benefits. Even quite young spruce or pine seedling and mixed forest stands can be grazed by sheep. In this system, the farmer or forest owner can do less tending of young forest stands and the first thinning can be delayed which saves costs on forest operations.
Einfluss von Kontextfaktoren auf das Suchverhalten in der Wikipedia
Creators: name: Knäusl, Hanna
name: Rösch, Barbara
name: Schubart, Lea
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: user research; information search; image; text; empirical study
subject: 004 Informatik

description: Articles in information portals like Wikipedia contain not only text, but also images, graphics, lists and navigational information. To investigate the usage of those content elements in different search scenarios we describe a lab study aiming at identifying the users’ preferences for varying media types in the different search situations.
Kochen im Kontext - Am Alltag orientierte Empfehlung von Gerichten
Creators: name: Elsweiler, David
name: Harvey, Morgan
name: Ludwig, Bernd
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: information system; nutrition; empirical analysis; recommendation system
subject: 004 Informatik

description: Eating and drinking are human everyday activities. Nevertheless, or perhaps just because of the supposed routing in doing this, the dietary habits of many people are very poor and even dangerous for health and well-being. In this contribution, the authors present their current research work that aims at developing information systems, which can alert users in case their dietary choices are poor and recommend ideas for improved behaviour.
Geometry of abstraction in quantum computation
Creators: name: Pavlovic, Dusko
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: Logic in Computer Science (cs.LO)
subject: Category Theory (math.CT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Quantum algorithms are sequences of abstract operations, performed on non-existent computers. They are in obvious need of categorical semantics. We present some steps in this direction, following earlier contributions of Abramsky, Coecke and Selinger. In particular, we analyze function abstraction in quantum computation, which turns out to characterize its classical interfaces. Some quantum algorithms provide feasible solutions of important hard problems, such as factoring and discrete log (which are the building blocks of modern cryptography). It is of a great practical interest to precisely characterize the computational resources needed to execute such quantum algorithms. There are many ideas how to build a quantum computer. Can we prove some necessary conditions? Categorical semantics help with such questions. We show how to implement an important family of quantum algorithms using just abelian groups and relations.
description: 29 pages, 42 figures; Clifford Lectures 2008 (main speaker Samson Abramsky); this version fixes a pstricks problem in a diagram
Silica precipitation with synthetic silaffin peptides
Creators: name: Sumper, Manfred
Publisher: name: Universität Regensburg
Year: 2011
Subjects: subject: 540 Chemie
subject: 570 Biowissenschaften, Biologie

description: Silaffins are highly charged proteins which are one of the major contributing compounds that are thought to be responsible for the formation of the hierarchically structured silica-based cell walls of diatoms. Here we describe the synthesis of an oligo-propyleneamine substituted lysine derivative and its incorporation into the KXXK peptide motif occurring repeatedly in silaffins. Nε-alkylation of lysine was achieved by a Mitsunobu reaction to obtain a protected lysine derivative which is convenient for solid phase peptide synthesis. Quantitative silica precipitation experiments together with structural information about the precipitated silica structures gained by scanning electron microscopy revealed a dependence of the amount and form of the silica precipitates on the peptide structure.
Cosmological Horizons as They Are Looked from a Moving Frame
Creators: name: Dokuchaev, V. I.
name: Eroshenko, Yu. N.
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the cosmological horizons in the expanding universe from the point of view of observer moving with respect to CMB frame. The deformation (non-sphericity) of cosmological horizons is demonstrated. Some principle consequences are discussed.
description: 3 pages, 2 figures, preprint submitted to Theoretical Physics
A Technical Review of Modern Cassava Technology Adoption in Nigeria (1985-2013): Trends, Challenges, and Opportunities
Creators: name: Adewale Oparinde
name: Tahirou Abdoulaye
name: Manyong, Victor
name: Birol, Ekin
name: Asare-Marfo, Dorene
name: Kulakow, Peter
name: Ilona, Paul
Publisher: name: Gates Open Research
Year: 2019

description: A Technical Review of Modern Cassava Technology Adoption in Nigeria (1985-2013): Trends, Challenges, and Opportunities
Approximation of the formal Bayesian model comparison using the extended conditional predictive ordinate criterion
Creators: name: Hoque, Md Rashedul
Publisher: name: University of British Columbia
Year: 2017

description: The optimal method for Bayesian model comparison is the formal Bayes factor (BF), according to decision theory. The formal BF is computationally troublesome for more complex models. If predictive distributions under the competing models do not have a closed form, a cross-validation idea, called the conditional predictive ordinate (CPO) criterion can be used. In the cross-validation sense, this is a ''leave-out one'' approach. CPO can be calculated directly from the Monte Carlo (MC) outputs, and the resulting Bayesian model comparison is called the pseudo Bayes factor (PBF). We can get closer to the formal Bayesian model comparison by increasing the ''leave-out size'', and at ''leave-out all'' we recover the formal BF. But, the MC error increases with increasing ''leave-out size''. In this study, we examine this for linear and logistic regression models. Our study reveals that the Bayesian model comparison can favour a different model for PBF compared to BF when comparing two close linear models. So, larger ''leave-out sizes'' are preferred which provide result close to the optimal BF. On the other hand, MC samples based formal Bayesian model comparisons are computed with more MC error for increasing ''leave-out sizes''; this is observed by comparing with the available closed form results. Still, considering a reasonable error, we can use ''leave-out size'' more than one instead of fixing it at one. These findings can be extended to logistic models where a closed form solution is unavailable.
Evaluating Business Process Improvement Patterns by Simulation
Creators: name: Lang, Markus
name: Wehner, Benjamin
name: Falk, Thomas
name: Griesberger, Philipp
name: Leist, Susanne
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: 000 Allgemeines, Wissenschaft

description: Existing approaches for business process improvement often lack systematic guidelines to transform a business process into an enhanced state, which we refer to as the “act of improvement”. To close this gap, a pattern-based approach has been designed and developed in previous works. In this paper, the usefulness of “Business Process Improvement Patterns” (BPI-Patterns) as a means of improving business processes is analyzed. For this purpose, a simulation experiment is performed in which several BPI-Patterns are applied to evaluate whether their anticipated effects can be confirmed for real-life business processes. From the analysis of the simulation results, i.e. how the application of BPI-Patterns affects the business processes, we investigate enabling as well as hindering factors that influence the implementation of BPI-Patterns. These factors may serve as a means to further specify instances of BPI-Patterns and also contribute to the overall evaluation of the BPI-Pattern approach.
description: ECIS ; (Münster) : 2015.05.26-29
Outperforming the benchmark: online information demand and REIT market performance
Creators: name: Rochdi, Karim
name: Dietzel, Marian
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Real estate, REIT, Google Trends, Information demand, Investment strategy, Search query data
subject: 330 Wirtschaft

description: Purpose – The purpose of this paper is to investigate whether there is a relationship between asset-specific online search interest and movements in the US REIT market. Design/methodology/approach – The authors collect search volume (SV) data from “Google Trends” for a set of keywords representing the information demand of real estate (equity) investors. On this basis, the authors test hypothetical investment strategies based on changes in internet SV, to anticipate REIT market movements. Findings – The results reveal that people’s information demand can indeed serve as a successful predictor for the US REIT market. Among other findings, evidence is provided that there is a significant relationship between asset-specific keywords and the US REIT market. Specifically, investment strategies based on weekly changes in Google SV would have outperformed a buy-and-hold strategy (0.1 percent p.a.) for the Morgan Stanley Capital International US REIT Index by a remarkable 15.4 percent p.a. between 2006 and 2013. Furthermore, the authors find that real-estate-related terms are more suitable than rather general, finance-related terms for predicting REIT market movements. Practical implications – The findings should be of particular interest for REIT market investors, as the established relationships can potentially be utilized to anticipate short-term REIT market movements. Originality/value – This is the first paper which applies Google search query data to the REIT market.
¿Por qué es importante tener una revista científica?
Creators: name: Pavas, Andrés
Publisher: name: Zenodo
Year: 2019
Subjects: Scientific journals
Science Policy

description: A lo largo de ésta presentación pretendo plantear ideas que motiven una discusión acerca del propósito que persigue una revista científica. Antes que responder a la pregunta ¿Por qué es importante tener una revista científica en una Universidad?, considero  relevante discutir qué hace, para qué sirve, a quién le presta servicio.

En relación con el rol que una revista científica desempeña en una Universidad, pretendo mostrar algunas ideas acerca de lo que motiva una revista al interior de una Institución. Mi propósito con las siguientes diapositivas es compartir mi experiencia como editor, no busco definir o decir lo que otros(as) editores(as) o instituciones deban hacer.
Sentiment-based predictions of housing market turning points with Google trends
Creators: name: Dietzel, Marian
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: Forecasting, Real estate, Sentiment, Google trends, Online search query data, Turning points
subject: 330 Wirtschaft

description: Purpose – Recent research has found significant relationships between internet search volume and real estate markets. This paper aims to examine whether Google search volume data can serve as a leading sentiment indicator and are able to predict turning points in the US housing market. One of the main objectives is to find a model based on internet search interest that generates reliable real-time forecasts. Design/methodology/approach – Starting from seven individual real-estate-related Google search volume indices, a multivariate probit model is derived by following a selection procedure. The best model is then tested for its in- and out-of-sample forecasting ability. Findings – The results show that the model predicts the direction of monthly price changes correctly, with over 89 per cent in-sample and just above 88 per cent in one to four-month out-of-sample forecasts. The out-of-sample tests demonstrate that although the Google model is not always accurate in terms of timing, the signals are always correct when it comes to foreseeing an upcoming turning point. Thus, as signals are generated up to six months early, it functions as a satisfactory and timely indicator of future house price changes. Practical implications – The results suggest that Google data can serve as an early market indicator and that the application of this data set in binary forecasting models can produce useful predictions of changes in upward and downward movements of US house prices, as measured by the Case–Shiller 20-City House Price Index. This implies that real estate forecasters, economists and policymakers should consider incorporating this free and very current data set into their market forecasts or when performing plausibility checks for future investment decisions. Originality/value – This is the first paper to apply Google search query data as a sentiment indicator in binary forecasting models to predict turning points in the housing market.
The probability density function tail of the Kardar-Parisi-Zhang equation in the strongly non-linear regime
Creators: name: Anderson, Johan
name: Johansson, Jonas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: An analytical derivation of the probability density function (PDF) tail describing the strongly correlated interface growth governed by the nonlinear Kardar-Parisi-Zhang equation is provided. The PDF tail exactly coincides with a Tracy-Widom distribution i.e. a PDF tail proportional to $\exp( - c w_2^{3/2})$, where $w_2$ is the the width of the interface. The PDF tail is computed by the instanton method in the strongly non-linear regime within the Martin-Siggia-Rose framework using a careful treatment of the non-linear interactions. In addition, the effect of spatial dimensions on the PDF tail scaling is discussed. This gives a novel approach to understand the rightmost PDF tail of the interface width distribution and the analysis suggests that there is no upper critical dimension.
description: 17 pages, 2 figures
Many-body spin echo
Creators: name: Engl, Thomas
name: Urbina, Juan Diego
name: Richter, Klaus
name: Schlagheck, Peter
Publisher: name: Universität Regensburg
Year: 2018
Subjects: subject: 530 Physik

description: We show that quantum coherence produces an observable many-body signature in the dynamics of few-fermion Hubbard systems (describing cold atoms in optical lattices, coupled quantum dots, or small molecules) in the form of a revival in the transition probabilities echoing a flip of the system's itinerant spins. Contrary to its single-particle (Hahn) version, this many-body spin echo is not dephased by strong interactions or spin-orbit coupling, and constitutes a benchmark of genuine many-body coherence. A physical picture that allows for the analytical study of this nonperturbative effect is provided by a semiclassical approach in Fock space, where coherence arises from interfering amplitudes associated with multiple chaotic mean-field solutions with action degeneracies due to antiunitary symmetries. The analytical predictions resulting from our semiclassical approach are in excellent quantitative agreement with corresponding numerical simulations. The latter, moreover, confirm that the shape of the echo profile is independent of the interaction, while its amplitude and sign universally depend only on the number of flipped spins and the spin-orbit coupling phase.
A Language for Particle Interactions in One-dimensional Cellular Automata
Creators: name: Redeker, Markus
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cellular Automata and Lattice Gases (nlin.CG)
subject: FOS: Physical sciences
subject: B.6.1
subject: 68Q80

description: This is a study of localised structures in one-dimensional cellular automata, with the elementary cellular automaton Rule 54 as a guiding example. A formalism for particles on a periodic background is derived, applicable to all one-dimensional cellular automata. One can compute which particles collide and in how many ways. One can also compute the fate of a particle after an unlimited number of collisions - whether they only produce other particles, or the result is a growing structure that destroys the background pattern. For Rule 54, formulas for the four most common particles are given and all two-particle collisions are found. We show that no other particles arise, which particles are stable and which can be created, provided that only two particles interact at a time. More complex behaviour of Rule 54 requires therefore multi-particle collisions.
description: This article is based on arXiv:1007.2920, but has grown considerable and is completely rewritten. Submitted to Complex Systems. 30 pages, 13 figures and 2 tables
Scanning probe microscope simulator for the assessment of noise in scanning probe microscopy controllers
Creators: name: Wutscher, Thorsten
name: Niebauer, Johannes
name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik

description: We present an electronic circuit that allows to calibrate and troubleshoot scanning probe microscopy (SPM) controllers with respect to their noise performance. The control signal in an SPM is typically highly nonlinear—the tunneling current in scanning tunneling microscopy (STM) varies exponentially with distance. The exponential current-versus-voltage characteristics of diodes allow to model the current dependence in STM. Additional inputs allow to simulate the effects of external perturbations and the reactions of the control electronics. We characterized the noise performance of the feedback controller using the apparent topography roughness of recorded images. For a comparison of different STM controllers, an optimal gain parameter was determined by exploring settling times through a rectangular perturbation signal. We used the circuit to directly compare the performance of two types of SPM controllers used in our laboratory.
Additional file 1 of Does breastfeeding account for the association between maternal sensitivity and infant cognitive development in a large, nationally representative cohort?
Creators: name: Banerjee, P. Nina
name: McFadden, Karen E.
name: Shannon, Jacqueline D.
name: Davidson, Leslie L.
Publisher: name: figshare
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology
subject: Computational Biology

description: Additional file 1.
Neutrino Signatures on the High Transmission Regions of the Lyman-alpha Forest
Creators: name: Villaescusa-Navarro, Francisco
name: Vogelsberger, Mark
name: Viel, Matteo
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We quantify the impact of massive neutrinos on the statistics of low density regions in the intergalactic medium (IGM) as probed by the Lyman-alpha forest at redshifts z=2.2--4. Based on mock but realistic quasar (QSO) spectra extracted from hydrodynamic simulations with cold dark matter, baryons and neutrinos, we find that the probability distribution of weak Lyman-alpha absorption features, as sampled by Lyman-alpha flux regions at high transmissivity, is strongly affected by the presence of massive neutrinos. We show that systematic errors affecting the Lyman-alpha forest reduce but do not erase the neutrino signal. Using the Fisher matrix formalism, we conclude that the sum of the neutrino masses can be measured, using the method proposed in this paper, with a precision smaller than 0.4 eV using a catalog of 200 high resolution (S/N~100) QSO spectra. This number reduces to 0.27 eV by making use of reasonable priors in the other parameters that also affect the statistics of the high transitivity regions of the Lyman-alpha forest. The constraints obtained with this method can be combined with independent bounds from the CMB, large scale structures and measurements of the matter power spectrum from the Lyman-alpha forest to produce tighter upper limits on the sum of the masses of the neutrinos.
description: 9 pages, 6 figures. MNRAS Accepted
Polymer-Enforced Crystallization of a Eutectic Binary Hard Sphere Mixture
Creators: name: Kozina, Anna
name: Sagawe, Dominik
name: Díaz-Leyva, Pedro
name: Bartsch, Eckhard
name: Palberg, Thomas
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We prepared a buoyancy matched binary mixture of polydisperse polystyrene microgel spheres of size ratio 0.785 and at a volume fraction of 0.567 just below the kinetic glass transition. In line with theoretical expectations, a eutectic phase behavior was observed, but only a minor fraction of the samples crystallized at all. By adding a short non-adsorbing polymer we enforce inter-species fractionation into coexisting pure component crystals, which in turn also shows signs of intra-species fractionation. We show that in formerly inaccessible regions of the phase diagram binary hard sphere physics is made observable using attractive hard spheres. Ancillary files: Correction to Soft Matter 2012, 8, 627
description: 4 pages, 2 Figures, Final accepted draft plus correction
Corporate social responsibility and the market valuation of listed real estate investment companies
Creators: name: Kerscher, Alexander Nikolaus
name: Schäfers, Wolfgang
Publisher: name: Universität Regensburg
Year: 2015
Subjects: subject: Corporate social responsibility; Global Reporting Initiative; Listed real estate; Real Estate Investment Trusts; GRI; CSR; 2SLS; Instrumental Variables; Component-wise Gradient Boosting
subject: 330 Wirtschaft

description: This study investigates the relationship between the implementation of a corporate social responsibility (CSR) strategy and the corporate financial performance of listed real estate investment companies. The sustainability of a company is measured using various self-constructed indices based on the Guidelines of the Global Reporting Initiative (GRI). Overall, a positive relationship can be established. An over-reporting of sustainability information dilutes this relationship. Furthermore, investors value initiatives which have a clear and coherent link to the enhancement of future value creation processes such as efforts to mitigate environmental impacts by reducing resource and energy consumption of buildings. A two-stage least squares regression framework is used to account for the problem of endogeneity.
Crosscap slides and the level 2 mapping class group of a nonorientable surface
Creators: name: Szepietowski, Blazej
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57N05, 20F38

description: Crosscap slide is a homeomorphism of a nonorientable surface of genus at least 2, which was introduced under the name Y-homeomorphism by Lickorish as an example of an element of the mapping class group which cannot be expressed as a product of Dehn twists. We prove that the subgroup of the mapping class group of a closed nonorientable surface N generated by all crosscap slides is equal to the level 2 subgroup consisting of those mapping classes which act trivially on H_1(N;Z_2). We also prove that this subgroup is generated by involutions.
description: Final version
Look Before You Leap: Improving the Users’ Ability to Detect Fraud in Electronic Marketplaces
Creators: name: Sänger, Johannes
name: Hänsch, Norman
name: Glass, Brian
name: Benenson, Zinaida
name: Landwirth, Robert
name: Sasse, M. Angela
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: trust; reputation systems; fraud detection; context-based attacks; visual analytics
subject: 004 Informatik

description: Reputation systems in current electronic marketplaces can easily be manipulated by malicious sellers in order to appear more reputable than appropriate. We conducted a controlled experiment with 40 UK and 41 German participants on their ability to detect malicious behavior by means of an eBay-like feedback profile versus a novel interface involving an interactive visualization of reputation data. The results show that participants using the new interface could better detect and understand malicious behavior in three out of four attacks (the overall detection accuracy 77% in the new vs. 56% in the old interface). Moreover, with the new interface, only 7% of the users decided to buy from the malicious seller (the options being to buy from one of the available sellers or to abstain from buying), as opposed to 30% in the old interface condition.
The effect of sample resistivity on Kelvin probe force microscopy
Creators: name: Weymouth, Alfred Jay
name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2012
Subjects: subject: 530 Physik

description: Kelvin probe force microscopy (KPFM) is a powerful technique to probe the local electronic structure of materials with atomic force microscopy. One assumption often made is that the applied bias drops fully in the tip-sample junction. We have recently identified an effect, the Phantom force, which can be explained by an ohmic voltage drop near the tip-sample junction causing a reduction of the electrostatic attraction when a tunneling current is present. Here, we demonstrate the strong effect of the Phantom force upon KPFM that can even produce Kelvin parabolae of opposite curvature.
Censored Truncated Sequential Spectrum Sensing for Cognitive Radio Networks
Creators: name: Maleki, Sina
name: Leus, Geert
Publisher: name: arXiv
Year: 2011
Subjects: subject: Systems and Control (eess.SY)
subject: Information Theory (cs.IT)
subject: Applications (stat.AP)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Reliable spectrum sensing is a key functionality of a cognitive radio network. Cooperative spectrum sensing improves the detection reliability of a cognitive radio system but also increases the system energy consumption which is a critical factor particularly for low-power wireless technologies. A censored truncated sequential spectrum sensing technique is considered as an energy-saving approach. To design the underlying sensing parameters, the maximum energy consumption per sensor is minimized subject to a lower bounded global probability of detection and an upper bounded false alarm rate. This way both the interference to the primary user due to miss detection and the network throughput as a result of a low false alarm rate is controlled. We compare the performance of the proposed scheme with a fixed sample size censoring scheme under different scenarios. It is shown that as the sensing cost of the cognitive radios increases, the energy efficiency of the censored truncated sequential approach grows significantly.
description: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6464630&isnumber=6464503
Die erweiterte Stabilitätsreihe der Phosphor-Allotrope
Creators: name: Bachhuber, Frederik
name: Appen, Joerg von
name: Dronskowski, Richard
name: Schmidt, Peer
name: Nilges, Tom
name: Pfitzner, Arno
name: Weihrich, Richard
Publisher: name: Universität Regensburg
Year: 2014
Subjects: subject: 540 Chemie

description: Phosphor fasziniert durch seine strukturelle Vielfalt und erregt nach wie vor Aufsehen durch die Entdeckung neuer Modifikationen. Diese Arbeit beschreibt erstmals eine komplette Stabilitätsreihe bekannter und neuer kristalliner Phosphorallotrope. Darin enthalten sind die jüngst beschriebenen tubulären Modifikationen und Vorhersagen zu den bislang unbekannten festen Strukturen der [P12]- und der noch nicht isolierten [P14]-Nanostäbe. Trotz signifikanter struktureller Unterschiede handelt es sich bei allen P-Allotropen um kovalente Teilstrukturen, die durch Van-der-Waals(vdW)-Wechselwirkungen zusammengehalten werden. Diese durch Rechnungen korrekt wiederzugeben, ist ein Kernpunkt aktueller Forschung. Während die etablierten DFT-Funktionale GGA und LDA bei der Beschreibung der P-Allotrope teilweise erheblich von experimentellen Werten abweichen, können mit dem hier verwendeten Korrekturterm (GGA-D2) durchgehend hervorragende Übereinstimmungen mit dem Experiment und Vorhersagen zu den festen Strukturen der P-Nanostäbe erreicht werden.
Double-slit and electromagnetic models to complete quantum mechanics
Creators: name: De Luca, Jayme
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze a realistic microscopic model for electronic scattering with the neutral differential delay equations of motion of point charges of the Wheeler-Feynman electrodynamics. We propose a microscopic model according to the electrodynamics of point charges, complex enough to describe the essential physics. Our microscopic model reaches a simple qualitative agreement with the experimental results as regards interference in double-slit scattering and in electronic scattering by crystals. We discuss our model in the light of existing experimental results, including a qualitative disagreement found for the double-slit experiment. We discuss an approximation for the complex neutral differential delay equations of our model using piecewise-defined (discontinuous) velocities for all charges and piecewise-constant-velocities for the scattered charge. Our approximation predicts the De Broglie wavelength as an inverse function of the incoming velocity and in the correct order of magnitude. We explain the scattering by crystals in the light of the same simplified modeling with Einstein-local interactions. We include a discussion of the qualitative properties of the neutral-delay-equations of electrodynamics to stimulate future experimental tests on the possibility to complete quantum mechanics with electromagnetic models.
description: 4 figures, the same post-publication typos over the published version of Journal of Computational and Theoretical Nanoscience, only that these correction are not marked in red as in V7, this one is for a recollection
Seeing the Reaction
Creators: name: Giessibl, Franz J.
Publisher: name: Universität Regensburg
Year: 2013
Subjects: subject: 530 Physik

description: What happens as a molecule goes through a chemical reaction? Model studies have provided important insights into these processes, but it remains extremely difficult to follow all the atomic rearrangements of a chemical reaction experimentally. In many cases, a reaction cannot be observed directly in real space, for example, because the reactants are in the gas state, zooming around at the speed of sound. On page 1434 of this issue, de Oteyza et al. (1) report atomically resolved imaging of a complex molecule as it undergoes a chemical reaction on a metal surface.
A College-Level Inquiry-Based Laboratory Activity on Transiting Planets
Creators: name: McConnell, Nicholas J.
name: Medling, Anne M.
name: Strubbe, Linda E.
name: Moth, Pimol
name: Montgomery, Ryan M.
name: Raschke, Lynne M.
name: Hunter, Lisa
name: Goza, Barbara
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: We have designed an inquiry-based laboratory activity on transiting extrasolar planets for an introductory college-level astronomy class. The activity was designed with the intent of simultaneously teaching science process skills and factual content about transits and light curves. In the activity, groups of two to four students each formulate a specific science question and design and carry out an investigation using a table-top model of a star and orbiting planet. Each group then presents their findings to other students in their class. In a final presentation, the instructors integrate students' findings with a summary of how measured light curves indicate properties of planetary systems. The activity debuted at Hartnell College in November 2009 and has also been adapted for a lecture-based astronomy course at U.C. Santa Cruz. We present the results of student surveys before and after the astronomy course at Hartnell and discuss how well our activity promotes students' confidence and identity as scientists, relative to traditional lab activities.
description: 10 pages, 1 figure, 1 table
การจัดการห่วงโซ่อุปทานหนูพุกเชิงพาณิชย์ในจังหวัดอุทัยธานี
Creators: name: ชัญญพัชร์ จารุวัชรเศรษฐ์
Publisher: name: ชมรมวิทยาลัยนวัตกรรมการจัดการ
Year: 2023
Subjects: การจัดการห่วงโซ่อุปทาน
การเลี้ยงหนูพุกเชิงพาณิชย์
อุทัยธานี

description: วารสารวิชาการ การจัดการภาครัฐและเอกชน, 5, 1, 1-12
Additional file 1 of Unifying the analysis of continuous and categorical measures of weight loss and incorporating group effect: a secondary re-analysis of a large cluster randomized clinical trial using Bayesian approach
Creators: name: Tang, Fengming
name: Befort, Christie A.
name: Wick, Jo
name: Gajewski, Byron J.
Publisher: name: figshare
Year: 2022
Subjects: subject: Statistics
subject: FOS: Mathematics

description: Additional file 1.
ผลกระทบทางเศรษฐกิจและสังคมจากสถานการณ์การแพร่ระบาดของโรคติดเชื้อไวรัสโคโรนา 2019 ของประชาชน ในจังหวัดนครศรีธรรมราช
Creators: name: สุดารัตน์ สุดสมบูรณ์
Publisher: name: ชมรมวิทยาลัยนวัตกรรมการจัดการ
Year: 2023
Subjects: ผลกระทบทางเศรษฐกิจและสังคม
ชีวิตวิถีใหม่
โควิด-19

description: วารสารวิชาการ การจัดการภาครัฐและเอกชน, 5, 1, 13-29
Marcusenius desertus sp. nov. (Teleostei: Mormyridae), a mormyrid fish from the Namib desert
Creators: name: Kramer, Bernd
name: van der Bank, Herman
name: Wink, Michael
Publisher: name: Universität Regensburg
Year: 2016
Subjects: subject: ecology, electric organ discharges, genetic differentiation, morphology, phylogeography, speciation
subject: 570 Biowissenschaften, Biologie
subject: 590 Tiere (Zoologie)

description: We critically compared Marcusenius specimens from the mouth of the Cunene River on the Namibia/Angola border, a harsh desert environment on the Atlantic Ocean coast virtually devoid of aerial insects with aquatic larvae which are an important food item, with Marcusenius multisquamatus Kramer & Wink, 2013 from the escarpment region of that same river, in a relatively rich and productive subtropical savannah environment. River mouth specimens were differentiated in morphology and electric organ discharges, as determined by ANOVA/MANOVA comparisons, principal component and discriminant analyses on morphological and electrophysiological characters, and genetics, including sequences of the mitochondrial cytochrome b gene, indicating reproductive isolation. Specimens from the river mouth differed from M. multisquamatus, their closest relatives, by having a shorter snout, a smaller eye diameter, and smaller nares separation. River mouth specimens were also differentiated from other, increasingly less-close relatives, such as M. altisambesi Kramer et al., 2007 from the Okavango River, Botswana, and from M. krameri Maake et al., 2014 from the Limpopo System, South Africa. We therefore designate the new species Marcusenius desertus sp. nov. for the Cunene River mouth population.
Regular isolated black holes
Creators: name: Kozameh, Carlos
name: Moreschi, Osvaldo
name: Perez, Alejandro
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We define a family of spacetimes representing isolated black holes exhibiting remarkable universal properties which are natural generalizations from stationary spacetimes. They admit a well defined notion of surface gravity k_H. This generalized surface gravity mediates an exponential relation between a regular null coordinate w near the horizon and an asymptotic Bondi null coordinate u defined in the vicinity of future null infinity. Our construction provides a framework for the study of gravitational collapse of an isolated system in its late stage of evolution.
description: published version