cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Emission spectrum of quasi-resonant laterally coupled quantum dots
Creators: name: Royo, Miquel
name: Climente, Juan Ignacio
name: Planelles, Josep
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We calculate the emission spectrum of neutral and charged excitons in a pair of laterally coupled InGaAs quantum dots with nearly degenerate energy levels. As the interdot distance decreases, a number of changes take place in the emission spectrum which can be used as indications of molecular coupling. These signatures ensue from the stronger tunnel-coupling of trions as compared to that of neutral excitons.
description: 7 pages, 7 figures
Engineering Excited-State Interactions at Ultracold Temperatures
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: physics.atom-ph

description: © 2019 American Physical Society. Using a recently developed method for precisely controlling collision energy, we observe a dramatic suppression of inelastic collisions between an atom and ion (Ca+Yb+) at low collision energy. This suppression, which is expected to be a universal phenomenon, arises when the spontaneous emission lifetime of the excited state is comparable to or shorter than the collision complex lifetime. We develop a technique to remove this suppression and engineer excited-state interactions. By dressing the system with a strong catalyst laser, a significant fraction of the collision complexes can be excited at a specified atom-ion separation. This technique allows excited-state collisions to be studied, even at ultracold temperature, and provides a general method for engineering ultracold excited-state interactions.
Differentially Describing Groups of Graphs
Creators: name: Coupette, Corinna
name: Dalleiger, Sebastian
name: Vreeken, Jilles
Publisher: name: CISPA
Year: 2023

description: How does neural connectivity in autistic children differ from neural connectivity in healthy children or autistic youths? What patterns in global trade networks are shared across classes of goods, and how do these patterns change over time? Answering questions like these requires us to differentially describe groups of graphs: Given a set of graphs and a parti- tion of these graphs into groups, discover what graphs in one group have in common, how they systematically differ from graphs in other groups, and how multiple groups of graphs are related. We refer to this task as graph group analysis, which seeks to describe similarities and differences between graph groups by means of statistically significant subgraphs. To per- form graph group analysis, we introduce GRAGRA, which uses maximum entropy modeling to identify a non-redundant set of subgraphs with statistically significant associations to one or more graph groups. Through an extensive set of ex- periments on a wide range of synthetic and real-world graph groups, we confirm that GRAGRA works well in practice.
Beyond small-scale spatial skills: Navigation skills and geoscience education
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: subject: Geographic Information Systems
subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Navigation
subject: Spatial cognition
subject: Virtual environment

description: © 2019, The Author(s). Background: Research examining the relation between spatial skills and the science, technology, engineering and mathematics (STEM) fields has focused on small-scale spatial skills, even though some STEM disciplines—particularly the geography and geoscience (GEO) fields—involve large-scale spatial thinking at the core of their professional training. In Study 1, we compared large-scale navigation skills of experienced geologists with those of experienced psychologists, using a novel virtual navigation paradigm as an objective measure of navigation skills. In Study 2, we conducted a longitudinal study with novice Geographic Information Systems (GIS) students to investigate baseline navigational competence and improvement over the course of an academic semester. Results: In Study 1, we found that geologists demonstrated higher navigational competence and were more likely to be categorized as integrating separate routes, compared to their non-STEM counterparts. In Study 2, novice GIS students showed superior baseline navigational competence compared to non-STEM students, as well as better spatial working memory and small-scale mental rotation skills, indicating self-selection. In addition, GIS students’ spatial skills improved more over the course of a semester than those of non-STEM students. Conclusions: Our findings highlight the importance of large-scale spatial thinking for enrollment and success in the GEO fields but likely also across the broader range of thinking involving spatial distributions. We discuss the potential of GIS tools to develop spatial skills at an early age.
title: Chronik der ADLAF 1964-1988
Creators: name: Nicklisch, Andrea
Publisher: name: Iberoamericana/Vervuert
Year: 2019
Subjects: subject: 300

description: Bibliotheca Ibero-Americana, vol. 17250 Jahre Arbeitsgemeinschaft Deutsche Lateinamerikaforschung ADLAF, p. 21
A population genetic assessment of taxonomic species: The case of Lake Malawi cichlid fishes
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: cichlids
hybridization
population genetics
speciation

description: © 2019 The Authors. Molecular Ecology Resources Published by John Wiley & Sons Ltd. Organisms sampled for population-level research are typically assigned to species by morphological criteria. However, if those criteria are limited to one sex or life stage, or the organisms come from a complex of closely related forms, the species assignments may misdirect analyses. The impact of such sampling can be assessed from the correspondence of genetic clusters, identified only from patterns of genetic variation, to the species identified using only phenotypic criteria. We undertook this protocol with the rock-dwelling mbuna cichlids of Lake Malawi, for which species within genera are usually identified using adult male coloration patterns. Given high local endemism of male colour patterns, and considerable allele sharing among species, there persists considerable taxonomic uncertainty in these fishes. Over 700 individuals from a single transect were photographed, genotyped and separately assigned: (a) to morphospecies using photographs; and (b) to genetic clusters using five widely used methods. Overall, the correspondence between clustering methods was strong for larger clusters, but methods varied widely in estimated number of clusters. The correspondence between morphospecies and genetic clusters was also strong for larger clusters, as well as some smaller clusters for some methods. These analyses generally affirm (a) adult male-limited sampling and (b) the taxonomic status of Lake Malawi mbuna, as the species in our study largely appear to be well-demarcated genetic entities. More generally, our analyses highlight the challenges for clustering methods when the number of populations is unknown, especially in cases of highly uneven sample sizes.
Entropy in the Classical and Quantum Polymer Black Hole Models
Creators: name: Livine, Etera R.
name: Terno, Daniel R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We investigate the entropy counting for black hole horizons in loop quantum gravity (LQG). We argue that the space of 3d closed polyhedra is the classical counterpart of the space of SU(2) intertwiners at the quantum level. Then computing the entropy for the boundary horizon amounts to calculating the density of polyhedra or the number of intertwiners at fixed total area. Following the previous work arXiv:1011.5628, we dub these the classical and quantum polymer models for isolated horizons in LQG. We provide exact micro-canonical calculations for both models and we show that the classical counting of polyhedra accounts for most of the features of the intertwiner counting (leading order entropy and log-correction), thus providing us with a simpler model to further investigate correlations and dynamics. To illustrate this, we also produce an exact formula for the dimension of the intertwiner space as a density of "almost-closed polyhedra".
description: 24 pages
Exploring the learning by using ECG-interpreting card games
Creators: name: Chu, Jan-Show
name: Chen, Chien-Yu
name: Chang, Yu-Hsiang
name: Tang, Kung-Pei
name: Yeh, Yen-Ting
name: Yang, Ya-Ting
name: Hsu, Yi-Hsin
Publisher: name: F1000 Research Limited
Year: 2024

description: This presentation reports on an innovative approach to teaching electrocardiogram (ECG) interpretation skills to healthcare professionals, specifically focusing on newly recruited nurses. Recognizing the challenges in traditional ECG teaching methods, which often rely on lectures and exams, our team at Taipei Medical University Hospital developed an ECG-interpreting card game as a complementary educational tool.

The study, conducted in 2023, employed a mixed-methods design to evaluate the effectiveness and reception of this novel teaching approach. We engaged 26 nurses of various levels (N0 to N4, including assistant head nurses) in this initiative. Our research utilized both quantitative measures, including a two-part questionnaire with demographic information and a flow scale test using a 5-point Likert scale, and qualitative assessments through participant feedback.

This presentation aims to share our findings on how gamification can enhance ECG interpretation skills, potentially leading to more effective learning outcomes compared to traditional methods alone. We will discuss the design of the card game, the methodology of our study, and the implications of our results for medical education, particularly in the context of nursing education and continuing professional development.
Bounds on the achromatic number of partial triple systems
Creators: name: Dukes, Peter James
name: MacGillivray, Gary
name: Parton, Kristin
Publisher: name: Faculty of Science, University of Calgary
Year: 2007

description: A complete $k$-colouring of a hypergraph is an assignment of $k$ colours to the points such that (1) there is no monochromatic hyperedge, and (2) identifying any two colours produces a monochromatic hyperedge.  The achromatic number of a hypergraph is the maximum $k$ such that it admits a complete $k$-colouring. We determine the maximum possible achromatic number among all maximal partial triple systems, give bounds on the maximum and minimum achromatic numbers of Steiner triple systems, and present a possible connection between optimal complete colourings and projective dimension.
description: Contributions to Discrete Mathematics, Vol 2, No 1 (2007)
Early Life Child Micronutrient Status, Maternal Reasoning, and a Nurturing Household Environment have Persistent Influences on Child Cognitive Development at Age 5 years: Results from MAL-ED
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: micronutrients
diarrhea
dietary intake
illness
home environment
cognitive development

description: © Copyright American Society for Nutrition 2019. Background: Child cognitive development is influenced by early-life insults and protective factors. To what extent these factors have a long-term legacy on child development and hence fulfillment of cognitive potential is unknown. Objective: The aim of this study was to examine the relation between early-life factors (birth to 2 y) and cognitive development at 5 y. Methods: Observational follow-up visits were made of children at 5 y, previously enrolled in the community-based MAL-ED longitudinal cohort. The burden of enteropathogens, prevalence of illness, complementary diet intake, micronutrient status, and household and maternal factors from birth to 2 y were extensively measured and their relation with the Wechsler Preschool Primary Scales of Intelligence at 5 y was examined through use of linear regression. Results: Cognitive T-scores from 813 of 1198 (68%) children were examined and 5 variables had significant associations in multivariable models: mean child plasma transferrin receptor concentration (β: -1.81, 95% CI: -2.75, -0.86), number of years of maternal education (β: 0.27, 95% CI: 0.08, 0.45), maternal cognitive reasoning score (β: 0.09, 95% CI: 0.03, 0.15), household assets score (β: 0.64, 95% CI: 0.24, 1.04), and HOME child cleanliness factor (β: 0.60, 95% CI: 0.05, 1.15). In multivariable models, the mean rate of enteropathogen detections, burden of illness, and complementary food intakes between birth and 2 y were not significantly related to 5-y cognition. Conclusions: A nurturing home context in terms of a healthy/clean environment and household wealth, provision of adequate micronutrients, maternal education, and cognitive reasoning have a strong and persistent influence on child cognitive development. Efforts addressing aspects of poverty around micronutrient status, nurturing caregiving, and enabling home environments are likely to have lasting positive impacts on child cognitive development.
Entanglement Perturbation Theory for Antiferromagnetic Heisenberg Spin Chains
Creators: name: Wang, Lihua
name: Chung, Sung Gong
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A recently developed numerical method, entanglement perturbation theory (EPT), is used to study the antiferromagnetic Heisenberg spin chains with z-axis anisotropy $λ$ and magnetic field B. To demonstrate the accuracy, we first apply EPT to the isotropic spin-1/2 antiferromagnetic Heisenberg model, and find that EPT successfully reproduces the exact Bethe Ansatz results for the ground state energy, the local magnetization, and the spin correlation functions (Bethe ansatz result is available for the first 7 lattice separations). In particular, EPT confirms for the first time the asymptotic behavior of the spin correlation functions predicted by the conformal field theory, which realizes only for lattice separations larger than 1000. Next, turning on the z-axis anisotropy and the magnetic field, the 2-spin and 4-spin correlation functions are calculated, and the results are compared with those obtained by Bosonization and density matrix renormalization group methods. Finally, for the spin-1 antiferromagnetic Heisenberg model, the ground state phase diagram in $λ$ space is determined with help of the Roomany-Wyld RG finite-size-scaling. The results are in good agreement with those obtained by the level-spectroscopy method.
description: 12 pages, 14 figures
Nanoparticle-Infused UHMWPE Layer as Multifunctional Coating for High-Performance PPTA Single Fibers
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: subject: 0912 Materials Engineering
subject: 0303 Macromolecular and Materials Chemistry
subject: 0306 Physical Chemistry (incl. Structural)
subject: 1007 Nanotechnology
subject: Nanotechnology
subject: FOS: Nanotechnology
subject: Bioengineering

description: © 2019, The Author(s). High-performance fibers made of poly-(p-phenylene terephthalamide) (PPTA) with high stiffness and high strength are widely used in body armor for protection due to their high degree of molecular chain alignment along the fiber direction. However, their poor mechanical properties in the transverse direction and low surface friction are undesirable for applications requiring resistance to ballistic impact. Here we provide a simple yet effective surface engineering strategy to improve both the transverse mechanical properties and the tribological property by coating PPTA fibers with ultra-high molecular weight polyethylene (UHMWPE) embedded with silica nanoparticles. The coated-PPTA fiber shows remarkable enhancement in transverse mechanical properties including ~127% increase of Young’s modulus, which is attributed to both the alignment of UHMWPE chains in the transverse direction and the embeded ceramic nanoparticles. Meanwhile, the surface friction of the coated fiber increases twofold as a result of the ceramic nanoparticles. In addition, the coated fibers exhibit an enhanced chemical resistance to external harsh environment. The improved transverse mechanical properties, surface frictional characteristics, and chemical resistance demonstrate that coating with UHMWPE and ceramic nanoparticles can be used as an effective approach to enhance the performance of PPTA and other high-performance polymer fibers for body armor applications.
A canonical partition theorem for trees
Creators: name: Vuksanovic, Vojkan
Publisher: name: Faculty of Science, University of Calgary
Year: 2007

description: In this paper we prove a 

canonical partition theorem for weakly embedded subtrees of a given 

regular tree. It was broght to my attention that there is a paper of 

Milliken "Canonical partition theorem  for strongly embedded subtrees of 

regular trees" circulated in the 1980's. This paper is still unpublished 

and the results in my paper are discovered independently. Although it is 

possible to conclude the result about weakly embedded subtrees from 

Milliken's paper, we give a direct proof which works for both, weakly and 

strongly embedded subtrees.
description: Contributions to Discrete Mathematics, Vol 2, No 1 (2007)
The flow lattice of oriented matroids
Creators: name: Nickel, Robert
name: Hochstättler, Winfried
Publisher: name: Faculty of Science, University of Calgary
Year: 2007

description: Recently Hochst"attler and Nev{s}etv{r}il introduced the flow lattice of an oriented matroid as generalization of the lattice of all integer flows of a digraph or more general a regular matroid. This lattice is defined as the integer hull of the characteristic vectors of signed circuits.

Here, we characterize the flow lattice of oriented matroids that are uniform or have rank 3 with a particular focus on the dimension of the lattice and construct a basis consisting of directed circuits. For general oriented matroids we introduce a 2-sum and decompose oriented matroids into 3-connected parts. We show how to determine the dimension of the lattice of 2-sums and conclude with some questions based on extensive experiments on small oriented matroids with connectivity at least 3.
description: Contributions to Discrete Mathematics, Vol 2, No 1 (2007)
From snake venom’s disintegrins and C-type lectins to anti-platelet drugs
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: snake venom
Tirofiban
Eptifibatide
Vipegitide
anti-platelet drug
acute coronary syndrome
percutaneous coronary intervention
clinical trial
adverse effect

description: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. Snake venoms are attractive natural sources for drug discovery and development, with a number of substances either in clinical use or in research and development. These drugs were developed based on RGD-containing snake venom disintegrins, which efficiently antagonize fibrinogen activation of αIIbβ3 integrin (glycoprotein GP IIb/IIIa). Typical examples of anti-platelet drugs found in clinics are Integrilin (Eptifibatide), a heptapeptide derived from Barbourin, a protein found in the venom of the American Southeastern pygmy rattlesnake and Aggrastat (Tirofiban), a small molecule based on the structure of Echistatin, and a protein found in the venom of the saw-scaled viper. Using a similar drug discovery approach, linear and cyclic peptides containing the sequence K(R)TS derived from VP12, a C-type lectin protein found in the venom of Israeli viper venom, were used as a template to synthesize Vipegitide, a novel peptidomimetic antagonist of α2β1 integrin, with anti-platelet activity. This review focus on drug discovery of these anti-platelet agents, their indications for clinical use in acute coronary syndromes and percutaneous coronary intervention based on several clinical trials, as well as their adverse effects.
Discovering Interpretable Data-to-Sequence Generators
Creators: name: Wiegand, Boris
name: Klakow, Dietrich
name: Vreeken, Jilles
Publisher: name: CISPA
Year: 2023

description: We study the problem of predicting an event sequence given some meta data. In particular, we are interested in learning easily interpretable models that can accurately generate a se- quence based on an attribute vector. To this end, we propose to learn a sparse event-flow graph over the training sequences, and statistically robust rules that use meta data to determine which paths to follow. We formalize the problem in terms of the Minimum Description Length (MDL) principle, by which we identify the best model as the one that compresses the data best. As the resulting optimization problem is NP-hard, we propose the efficient CONSEQUENCE algorithm to discover good event-flow graphs from data. Through an extensive set of experiments including a case study, we show that it ably discovers compact, interpretable and accurate models for the generation and prediction of event sequences from data, has a low sample complexity, and is particularly robust against noise.
Partial order and a $T_0$-topology in a set of finite quantum systems
Creators: name: Vourdas, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A `whole-part' theory is developed for a set of finite quantum systems $Σ(n)$ with variables in ${\mathbb Z}(n)$. The partial order `subsystem' is defined, by embedding various attributes of the system $Σ(m)$ (quantum states, density matrices, etc) into their counterparts in the supersystem $Σ(n)$ (for $m|n$). The compatibility of these embeddings is studied. The concept of ubiquity is introduced for quantities which fit with this structure. It is shown that various entropic quantities are ubiquitous. The sets of various quantities become $T_0$-topological spaces with the divisor topology, which encapsulates fundamental physical properties. These sets can be converted into directed-complete partial orders (dcpo), by adding `top elements'. The continuity of various maps among these sets is studied.
Fast reflective optic-based rotational anisotropy nonlinear harmonic generation spectrometer
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: physics.ins-det
physics.optics

description: © 2019 Author(s). We present a novel Rotational Anisotropy Nonlinear Harmonic Generation (RA-NHG) apparatus based primarily upon reflective optics. The data acquisition scheme used here allow for fast accumulation of RA-NHG traces, mitigating low frequency noise from laser drift, while permitting real-time adjustment of acquired signals with significantly more data points per unit angle rotation of the optics than other RA-NHG setups. We discuss the design and construction of the optical and electronic components of the device and present example data taken on a GaAs test sample at a variety of wavelengths. The RA-second harmonic generation data for this sample show the expected four-fold rotational symmetry across a broad range of wavelengths, while those for RA-third harmonic generation exhibit evidence of cascaded nonlinear processes possible in acentric crystal structures.
Effective Potential in Curved Space and Cut-Off Regularizations
Creators: name: Sobreira, Flavia
name: Ribeiro, Baltazar J.
name: Shapiro, Ilya L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences
subject: 81T20, 81T10, 81T15

description: We consider derivation of the effective potential for a scalar field in curved space-time within the physical regularization scheme, using two sorts of covariant cut-off regularizations. The first one is based on the local momentum representation and Riemann normal coordinates and the second is operatorial regularization, based on the Fock-Schwinger-DeWitt proper-time representation. We show, on the example of a self-interacting scalar field, that these two methods produce equal results for divergences, but the first one gives more detailed information about the finite part. Furthermore, we calculate the contribution from a massive fermion loop and discuss renormalization group equations and their interpretation for the multi-mass theories.
description: Several misprints in signs corrected. Added related thanks, also more comments and a few references. Fits the version to be published in Physics Letters B. 16 pages, no figures, LaTeX
Towards improved hydraulic fracturing effectiveness through modelling and data integration: A case study from the Horn River Basin, BC
Creators: name: Kent, Alana Hope
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: hydraulic fracture
subject: Microseismic
subject: reflection seismic attributes
subject: Short Interval Re-injection
subject: natural fractures (DFN)
subject: geomechanical model
subject: Horn River Basin
subject: data integration
subject: Geophysics
subject: FOS: Earth and related environmental sciences

description: Understanding how hydraulic fracture (HF) treatments affect a formation is crucial to ensure economical production in unconventional reservoirs. This thesis investigates an industry dataset from the Horn River Basin (HRB) that consists of microseismic (MS), reflection seismic, drilling, and completion data. Analysis of the MS reveals high variability in event clouds. While single monitor well bias is prominent in the magnitude statistics trends, kinked probability distributions and high outlier events suggest multiple mechanisms for MS generation. Spatial distributions are not classical bi-wing patterns but show lateral confinement, azimuthal variations, and out-of-zone growth. Stress heterogeneity is evident from variability in the instantaneous shut-in pressure (ISIP) and breakdown pressure values. The reflection seismic attributes of amplitude, most positive curvature (kpos), P-Wave impedance (Zp), and brittleness (BRI) show reservoir compartmentalization and are interpreted to account for irregular microseismic event growth. Deep MS growth is attributed to cross-cutting linear kpos trends and high values also appear to create a barrier; MS events arrest or curl to avoid positive anomalies. Rapid Zp transitions are also interpreted as a barrier and perforations in high zones correlate to rounded cloud growth and completion issues. In some situations, the high kpos and Zp values are co-located, suggesting that the impedance contrast is due to fractures. Both wells are in brittle areas but BRI does not appear to dictate growth direction. A completion method, named here as Short Interval Re-injection (SIR), is investigated with respect to the cohesionless state of the created fracture network, comprised of natural fractures (DFN) and the HF plane. The computer modelling code 3DEC was used to create a geomechanical model with observed MS events used as the calibration metric. The increase in MS event count seen in literature was replicated in the observed and modelled MS but it was discerned that the technique did not increase fracture complexity, as few new fractures were created during the re-injection. It is instead suggested that the SIR technique reinforces previously created fractures to improve stage production.
On the relation between Differential Privacy and Quantitative Information Flow
Creators: name: Alvim, Mário S.
name: Andrés, Miguel E.
name: Chatzikokolakis, Konstantinos
name: Palamidessi, Catuscia
Publisher: name: arXiv
Year: 2011
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Differential privacy is a notion that has emerged in the community of statistical databases, as a response to the problem of protecting the privacy of the database's participants when performing statistical queries. The idea is that a randomized query satisfies differential privacy if the likelihood of obtaining a certain answer for a database $x$ is not too different from the likelihood of obtaining the same answer on adjacent databases, i.e. databases which differ from $x$ for only one individual. Information flow is an area of Security concerned with the problem of controlling the leakage of confidential information in programs and protocols. Nowadays, one of the most established approaches to quantify and to reason about leakage is based on the Rényi min entropy version of information theory. In this paper, we analyze critically the notion of differential privacy in light of the conceptual framework provided by the Rényi min information theory. We show that there is a close relation between differential privacy and leakage, due to the graph symmetries induced by the adjacency relation. Furthermore, we consider the utility of the randomized answer, which measures its expected degree of accuracy. We focus on certain kinds of utility functions called "binary", which have a close correspondence with the Rényi min mutual information. Again, it turns out that there can be a tight correspondence between differential privacy and utility, depending on the symmetries induced by the adjacency relation and by the query. Depending on these symmetries we can also build an optimal-utility randomization mechanism while preserving the required level of differential privacy. Our main contribution is a study of the kind of structures that can be induced by the adjacency relation and the query, and how to use them to derive bounds on the leakage and achieve the optimal utility.
Toward A Consistent Picture For CRESST, CoGeNT and DAMA
Creators: name: Kelso, Chris
name: Hooper, Dan
name: Buckley, Matthew R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Three dark matter direct detection experiments (DAMA/LIBRA, CoGeNT, and CRESST-II) have each reported signals which are not consistent with known backgrounds, but resemble that predicted for a dark matter particle with a mass of roughly $\sim$10 GeV and an elastic scattering cross section with nucleons of $\sim$$10^{-41}$--$10^{-40}$ cm$^2$. In this article, we compare the signals of these experiments and discuss whether they can be explained by a single species of dark matter particle, without conflicting with the constraints of other experiments. We find that the spectrum of events reported by CoGeNT and CRESST-II are consistent with each other and with the constraints from CDMS-II, although some tension with xenon-based experiments remains. Similarly, the modulation signals reported by DAMA/LIBRA and CoGeNT appear to be compatible, although the corresponding amplitude of the observed modulations are a factor of at least a few higher than would be naively expected, based on the event spectra reported by CoGeNT and CRESST-II. This apparent discrepancy could potentially be resolved if tidal streams or other non-Maxwellian structures are present in the local distribution of dark matter.
description: 11 pages, 7 figures
Validity of the WKB Approximation in Calculating the Asymptotic Quasinormal Modes of Black Holes
Creators: name: Daghigh, Ramin G.
name: Green, Michael D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper, we categorize non-rotating black hole spacetimes based on their pole structure and in each of these categories we determine whether the WKB approximation is a valid approximation for calculating the asymptotic quasinormal modes. We show that Schwarzschild black holes with the Gauss-Bonnet correction belong to the category in which the WKB approximation is invalid for calculating these modes. In this context, we further discuss and clarify some of the ambiguity in the literature surrounding the validity conditions provided for the WKB approximation.
description: 10 pages
Azimuthal Harmonics in Small and Large Collision Systems at RHIC Top Energies
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: STAR Collaboration

description: © 2019 American Physical Society. The first (v1fluc), second (v2), and third (v3) harmonic coefficients of the azimuthal particle distribution at midrapidity are extracted for charged hadrons and studied as a function of transverse momentum (pT) and mean charged particle multiplicity density Nch in U+U (sNN=193 GeV), Au+Au, Cu+Au, Cu+Cu, d+Au, and p+Au collisions at sNN=200 GeV with the STAR detector. For the same Nch, the v1fluc and v3 coefficients are observed to be independent of the collision system, while v2 exhibits such a scaling only when normalized by the initial-state eccentricity (μ2). The data also show that ln(v2/μ2) scales linearly with Nch-1/3. These measurements provide insight into initial-geometry fluctuations and the role of viscous hydrodynamic attenuation on vn from small to large collision systems.
Improving Academic and Personal Success for Native Learners Seeking Culturally Relevant and Authentic Anishinaabe Knowledge as Shared by a Knowledge Keeper
Creators: name: Poitras-Collins, Tracey Jeanne
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Anishinaabe
subject: Indigenous Knowledge
subject: Native Traditional Teachings
subject: Native Students
subject: Native Identity, Personal and Academic Success
subject: Education--Administration

description: This study of culturally relevant and authentic Anishinaabe Knowledge was possible through the discussions with a well-respected and well-known Knowledge Keeper who comes from the community that call themselves Runners. He does not consider himself an Elder in my observation as he is too humble and wishes not to be identified to ensure his privacy. With the arrival of the European ideologies and degradation of Native cultures, mores and education systems, the Runners were given the responsibility to retain their Knowledge. This Anishinaabe cultural system, that the Runners have retained, has existed since time immemorial and sustained the people of Turtle Island for millennia. Native education is a land and sky, creation and cosmos-based learning system that is as applicable today as it was four hundred years ago. However, the teachings of our ancestors are being lost and very few remember the authentic teachings. Through the documentation of the oral land and sky teachings, these teachings will continue for another millennium. Using a combination of Indigenous and narrative inquiry methods, teachings of the Knowledge Keeper have been recorded and shared as truth. This knowledge will be available for all who wish to learn it. By balancing this ancient Anishinaabe education system and today’s Eurocentric and English-based education system, the academic attainment of Native learners and the education of non-Native people may be supported. The term Native has been selected for this dissertation based on the Knowledge Keeper’s explanation where he shared, “Native is from the land”. This dissertation is the documentation and dissemination (storytelling) of an Anishinaabe Knowledge Keeper who shares traditional teachings of the natural organization related to Native education.
First Measurements of the Double-Polarization Observables F, P, and H in ω Photoproduction off Transversely Polarized Protons in the N∗ Resonance Region
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: CLAS Collaboration

description: © 2019 American Physical Society. First measurements of double-polarization observables in ω photoproduction off the proton are presented using transverse target polarization and data from the CEBAF Large Acceptance Spectrometer (CLAS) FROST experiment at Jefferson Lab. The beam-target asymmetry F has been measured using circularly polarized, tagged photons in the energy range 1200-2700 MeV, and the beam-target asymmetries H and P have been measured using linearly polarized, tagged photons in the energy range 1200-2000 MeV. These measurements significantly increase the database on polarization observables. The results are included in two partial-wave analyses and reveal significant contributions from several nucleon (N∗) resonances. In particular, contributions from new N∗ resonances listed in the Review of Particle Properties are observed, which aid in reaching the goal of mapping out the nucleon resonance spectrum.
“Finally, I can do it my way.” Students’ experiences of participation, agency, and identity in disciplinary and interdisciplinary undergraduate science
Creators: name: Gerhard, Gillian Michelle
Publisher: name: University of British Columbia
Year: 2011

description: This study explores the learning practices that are valued and experienced by students who choose an interdisciplinary science degree, and how these practices contribute to the science-student related identities that are developed through participation in disciplinary and interdisciplinary learning contexts. The study objectives were to investigate undergraduate students’ experiences of participation in disciplinary and interdisciplinary science degree programs. To address these objectives, I carried out a collective case study of 9 undergraduate science students who transferred from the Mainstream science program to the InterScience program in the Faculty of Science at Large Research University. Specifically, between 2004 and 2006, I invited students to share their stories through semi-structured interviews and I listened to the stories that developed through students’ interactions and relations during class. Using socio-cultural theories and narrative research methods, I sought to find, in the stories students shared, the practices in which they engage and through which they claim identity. I analyzed the data using open coding and the constant comparative method. My findings indicate that the InterScience students who participated in my study value learning practices that lead to insights from multiple science disciplines and that facilitate interdisciplinary understanding. Further, these students wanted to approach their learning in a deep way, pursuing their interests and exercising self-determination in their science education. The students found that the structures and pedagogical strategies of Mainstream science limited participation in the practices of interdisciplinary science understanding, whereas the InterScience program structures and pedagogies enabled participation. Consequently, the students developed identities of exclusion and disengagement from Mainstream science and identities of belonging and legitimate peripheral participation with respect to the InterScience program. This research provides evidence and examples of how disciplinary aspects of science learning environments can foster experiences of alienation for students who are oriented towards interdisciplinary ways of knowing. It also shows that by creating a community of integrated science practice, interdisciplinary science degree programs can enable bright and keen, but deeply alienated students who seek interdisciplinary understanding to re-engage with their university and to become passionate advocates for their undergraduate education.
Deeply supervised model for click-through rate prediction in sponsored search
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: Deep learning
Click prediction
Query to ad matching

description: © 2019, The Author(s), under exclusive licence to Springer Science+Business Media LLC, part of Springer Nature. In sponsored search it is critical to match ads that are relevant to a query and to accurately predict their likelihood of being clicked. Commercial search engines typically use machine learning models for both query-ad relevance matching and click-through-rate (CTR) prediction. However, matching models are based on the similarity between a query and an ad, ignoring the fact that a retrieved ad may not attract clicks, while click models rely on click history, limiting their use for new queries and ads. We propose a deeply supervised architecture that jointly learns the semantic embeddings of a query and an ad as well as their corresponding CTR. We also propose a novel cohort negative sampling technique for learning implicit negative signals. We trained the proposed architecture using one billion query-ad pairs from a major commercial web search engine. This architecture improves the best-performing baseline deep neural architectures by 2% of AUC for CTR prediction and by statistically significant 0.5% of NDCG for query-ad matching.
Etablierung mobiler genetischer Elemente zur Transplantation extrazellulärer Elektronentransportketten
Creators: name: Philipp, Laura-Alina
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2021

description: Die Forschung im Bereich der Bioelektrochemie stellt neue einzigartige Möglichkeiten zur Untersuchung und Nutzung mikrobieller Physiologie bereit. Dabei eröffnet sie Anwendungen im Bereich nachhaltiger Fermentationsroutinen, dezentraler Mediation von Umwelt- kontaminationen sowie im Bereich der Biosensorik. Im Zentrum steht dabei stets die Interaktion zwischen Mikrobe und Elektrode. In Elektroden-gestützten Fermentationen katalysieren Mikroorganismen unter anoxischen Bedingungen den Elektronentransfer auf die Anode eines bioelektrochemischen Systems (BES). So können Produktionsroutinen zur Synthese von Plattformchemikalien mit der Gewinnung elektrischer Energie einhergehen. Außerdem profitieren diese Prozesse von dem typischerweise hohen Verhältnis kataboler zu anaboler Substratnutzung. Ein grundlegendes Verständnis des extrazellulären Elektronentransfers (EET) ist notwendig, um Stämme zu etablieren, die den industriellen Anforderungen entsprechen. Durch schrittweise Transplantation der EET-Kette des nativen exoelektrogenen Modellorganismus $\textit{Shewanella oneidensis}$ ($\textit{S. oneidensis}$) in den Wirtsorganismus $\textit{Escherichia coli}$ ($\textit{E. coli}$) wurden in dieser Arbeit die Elektronentransferschritte individuell analysiert und der Einfluss assoziierter Faktoren ermittelt. Dazu konnte das putative minimale Proteinset, bestehend aus den $\textit{c}$-Typ Cytochromen CymA, STC, MtrA und MtrC sowie dem β-$\textit{barrel}$-Protein MtrB, in unterschiedlichen Ausbaustufen heterolog exprimiert und diese hinsichtlich ihrer Reduktionsraten mit $\textit{S. oneidensis}$-Stämmen mit ähnlichen relevanten Proteinsetups verglichen werden. Daraus wurde ersicht lich, dass die Transplantation heterologer EET-Ketten mit enorm verringerten Elektronentransferraten im Vergleich zu denen nativer exoelektrogener Mikroorganismen einhergeht. Davon ausgehend wurden weitere genetische Elemente identifiziert und integriert, welchen durch Protein-Maturation, - Lokalisation und -Funktionalität eine mutmaßliche indirekte Beteiligung am EET zugeschrieben wird. Insbesondere ging es dabei um das hochkomplexe Cytochtom $\textit{c}$-Reifungssystem, die Biosynthese von Menachinon-7 sowie das Typ II-Sekretionssystem. Letzteres ermöglichte erstmalig die korrekte Lokalisation der terminalen Reduktase MtrC durch Sekretion auf die Zelloberfläche. Dennoch waren die dadurch gesteigerten Reduktionsraten nicht kompetitiv mit Reduktionsraten in $\textit{S. oneidensis}$. Diese Daten deuten darauf hin, dass die EET-Prozesse weitaus komplexer sind als bisher angenommen. Aus diesem Grund wurde anschließend ein gain-of-function Screen auf Basis einer $\textit{S. oneidensis}$ Fosmid-Bibliothek etabliert, über den weitere putative Faktoren für einen verbesserten EET identifiziert werden konnten.
Prescribed fire maintains host plants of a rare grassland butterfly
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: Animals
Butterflies
Conservation of Natural Resources
Ecosystem
Endangered Species
Fires
Grassland
Viola

description: © 2019, The Author(s). As grassland ecosystems transform globally due to anthropogenic pressures, improvements in our understanding of the effect of management on rare and threatened species in such landscapes has become urgent. Although prescribed fire is a very efficient tool for habitat restoration and endangered species management on fire-adapted ecosystems, the specific mechanisms underlying potential effects of burning on population dynamics of butterfly host plants are poorly understood. We analyzed a 12-year dataset (2004–2015), combining violet abundance, habitat physiognomy and fire history data from a fire-managed system, to determine factors influencing the spatiotemporal distribution and abundance of violets (Viola spp.), the host plants of the threatened eastern regal fritillary (Speyeria idalia idalia) butterfly. Our results demonstrate a critical role for fire in driving both presence and abundance of violets, suggesting management with prescribed fires can effectively promote butterfly host plants. In addition, we determined the character of habitats associated with violet presence and abundance, in particular a strong positive association with biocrusts. These results provide a roadmap for efficient site selection to increase the effectiveness of restoration efforts, including assessment of potential reintroduction sites for regal fritillary and other grassland butterflies and actions to promote the re-establishment of host plants in these sites.
title: Die deutsche Lateinamerikaforschung im Wandel
Creators: name: Werz, Nikolaus
Publisher: name: Iberoamericana/Vervuert
Year: 2019
Subjects: subject: 300

description: Bibliotheca Ibero-Americana, vol. 17250 Jahre Arbeitsgemeinschaft Deutsche Lateinamerikaforschung ADLAF, p. 103
Acoustic Signatures of the Helium Core Flash
Creators: name: Bildsten, Lars
name: Paxton, Bill
name: Moore, Kevin
name: Macias, Phillip J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: All evolved stars with masses M <2 solar masses undergo an initiating off-center helium core flash in their 0.48 solar mass He core as they ascend the red giant branch (RGB). This off-center flash is the first of a few successive helium shell subflashes that remove the core electron degeneracy over 2 Myrs, converting the object into a He burning star. Though characterized by Thomas over 40 years ago, this core flash phase has yet to be observationally probed. Using the Modules for Experiments in Stellar Astrophysics (MESA) code, we show that red giant asteroseismology enabled by space-based photometry (i.e. Kepler and CoRoT) can probe these stars during the flash. The rapid (< 100,000 years) contraction of the red giant envelope after the initiating flash dramatically improves the coupling of the p-modes to the core g-modes, making the detection of l=1 mixed modes possible for these 2 Myrs. This duration implies that 1 in 35 stars near the red clump in the HR diagram will be in their core flash phase. During this time, the star has a g-mode period spacing of Delta P_g = 70-100 seconds, lower than the Delta P_g=250 seconds of He burning stars in the red clump, but higher than the RGB stars at the same luminosity. This places them in an underpopulated part of the large frequency spacing (Delta nu) vs. Delta P_g diagram that should ease their identification amongst the thousands of observed red giants.
description: 15 pages, 5 figures, To Appear in Astrophysical Journal Letters