cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Decomposition of the complete bipartite graph with a 1-factor removed into paths and stars
Creators: name: Lin, Jenq-Jong
name: Lee, Hung-Chih
Publisher: name: Faculty of Science, University of Calgary
Year: 2018
Subjects: Decomposition; complete bipartite graph; path; star; crown

description: Let P_k denote a path on k vertices, and let S_k denote a star with k edges. For graphs F, G, and H, a decomposition of F is a set of edge-disjoint subgraphs of F whose union is F. A (G,H)-decomposition of F is a decomposition of F into copies of G and H using at least one of each. In this paper, necessary and sufficient conditions for the existence of the (P_{k+1},S_k)-decomposition of the complete bipartite graph with a 1-factor removed are given.
description: Contributions to Discrete Mathematics, Vol 13, No 2 (2018)
Subcubic certificates for CFL reachability
Creators: name: Chistikov, Dmitry
name: Majumdar, Rupak
name: Schepper, Philipp
Publisher: name: CISPA
Year: 2023

description: Many problems in interprocedural program analysis can be modeled as the context-free language (CFL) reachability problem on graphs and can be solved in cubic time. Despite years of efforts, there are no known truly sub-cubic algorithms for this problem. We study the related certification task: given an instance of CFL reachability, are there small and efficiently checkable certificates for the existence and for the non-existence of a path? We show that, in both scenarios, there exist succinct certificates (O(n^2) in the size of the problem) and these certificates can be checked in subcubic (matrix multiplication) time. The certificates are based on grammar-based compression of paths (for reachability) and on invariants represented as matrix inequalities (for non-reachability). Thus, CFL reachability lies in nondeterministic and co-nondeterministic subcubic time. A natural question is whether faster algorithms for CFL reachability will lead to faster algorithms for combinatorial problems such as Boolean satisfiability (SAT). As a consequence of our certification results, we show that there cannot be a fine-grained reduction from SAT to CFL reachability for a conditional lower bound stronger than n^ω, unless the nondeterministic strong exponential time hypothesis (NSETH) fails. In a nutshell, reductions from SAT are unlikely to explain the cubic bottleneck for CFL reachability. Our results extend to related subcubic equivalent problems: pushdown reachability and 2NPDA recognition; as well as to all-pairs CFL reachability. For example, we describe succinct certificates for pushdown non-reachability (inductive invariants) and observe that they can be checked in matrix multiplication time. We also extract a new hardest 2NPDA language, capturing the “hard core” of all these problems.
A Guide to Representational Similarity Analysis for Social Neuroscience
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: representational similarity analysis
social neuroscience
fMRI
multivariate pattern analysis

description: © 2020 The Author(s) 2020. Published by Oxford University Press. Representational similarity analysis (RSA) is a computational technique that uses pairwise comparisons of stimuli to reveal their representation in higher-order space. In the context of neuroimaging, mass-univariate analyses and other multivariate analyses can provide information on what and where information is represented but have limitations in their ability to address how information is represented. Social neuroscience is a field that can particularly benefit from incorporating RSA techniques to explore hypotheses regarding the representation of multidimensional data, how representations can predict behavior, how representations differ between groups and how multimodal data can be compared to inform theories. The goal of this paper is to provide a practical as well as theoretical guide to implementing RSA in social neuroscience studies.
Near-infrared spectro-interferometry of three OH/IR Stars with the VLTI/AMBER instrument
Creators: name: Ruiz-Velasco, A. E.
name: Wittkowski, M.
name: Wachter, A.
name: Schroeder, K. -P.
name: Driebe, T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate the molecular and dusty environment of OH/IR stars in order to characterize the mass-loss process during the tip-AGB superwind phase. Employing the AMBER instrument at the VLT Interferometer we obtained near-infrared H- and K-band spectro-interferometric observations of the three OH/IR stars IRAS 13479-5436, IRAS 14086-6907 and IRAS 17020-5254 with a spectral resolution of about 35. We use a two-component geometrical model, consisting of a uniform disk and a Gaussian disk, to obtain characteristic angular sizes of the central stellar sources and their dust envelopes, as well as the flux ratios between these components. Angular uniform disk diameters of the three central components of the objects above have values between 3.2 mas and 5.4 mas. For their dust envelopes, we find FWHM values between 17.1 mas and 25.2 mas. According to distance estimates from the literature, the central stellar components have radii between 900 R_sun and 1400 R_sun, while their dust envelopes reach FWHM values between 9000 R_sun and 13000 R_sun. The visibility functions of all three sources exhibit wavelength variations that resemble those of earlier VLTI/AMBER observations of semi-regular and Mira variable AGB stars. These are interpreted as characteristic of atmospheric molecular layers lying above the photosphere. We also find that the dust envelopes have a clearly larger optical depth than those known for Mira stars. We interpret this as an expected result of the "superwind" phase, the final 10 000 to 30 000 years of AGB-evolution, when the mass-loss rate increases by a factor of 10-100. By their different optical depths, the three dust shells studied here may represent different stages of the "superwind" and different initial masses.
description: 5 pages, 6 figures, accepted for publication in Astronomy and Astrophysics
An anti-interference scheme for UAV data links in air–ground integrated vehicular networks
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: air-ground integrated vehicular networks (AGIVNs)
data links
multi-ary (M-ary) spread spectrum
multi-carrier modulation (MCM)
unmanned aerial vehicle (UAV)

description: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. As one of the main applications of the Internet of things (IoT), the vehicular ad-hoc network (VANET) is the core of the intelligent transportation system (ITS). Air–ground integrated vehicular networks (AGIVNs) assisted by unmanned aerial vehicles (UAVs) have the advantages of wide coverage and flexible configuration, which outperform the ground-based VANET in terms of communication quality. However, the complex electromagnetic interference (EMI) severely degrades the communication performance of UAV sensors. Therefore, it is meaningful and challenging to design an efficient anti-interference scheme for UAV data links in AGIVNs. In this paper, we propose an anti-interference scheme, named as Mary-MCM, for UAV data links in AGIVNs based on multi-ary (M-ary) spread spectrum and multi-carrier modulation (MCM). Specifically, the Mary-MCM disperses the interference power by expanding the signal spectrum, such that the anti-interference ability of AGIVNs is enhanced. Besides, by using MCM and multiple-input multiple-output (MIMO) technologies, the Mary-MCM improves the spectrum utilization effectively while ensuring system performance. The simulation results verify that the Mary-MCM achieves excellent anti-interference performance under different EMI combinations.
Solution structure, glycan specificity and of phenol oxidase inhibitory activity of Anopheles C-type lectins CTL4 and CTLMA2
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: Amino Acid Sequence
Animals
Anopheles
Calcium
Conserved Sequence
Enzyme Inhibitors
Escherichia coli
Insect Proteins
Lectins, C-Type
Monophenol Monooxygenase
Polysaccharides
Recombinant Proteins
Solutions

description: © 2019, The Author(s). Malaria, the world’s most devastating parasitic disease, is transmitted between humans by mosquitoes of the Anopheles genus. An. gambiae is the principal malaria vector in Sub-Saharan Africa. The C-type lectins CTL4 and CTLMA2 cooperatively influence Plasmodium infection in the malaria vector Anopheles. Here we report the purification and biochemical characterization of CTL4 and CTLMA2 from An. gambiae and An. albimanus. CTL4 and CTLMA2 are known to form a disulfide-bridged heterodimer via an N-terminal tri-cysteine CXCXC motif. We demonstrate in vitro that CTL4 and CTLMA2 intermolecular disulfide formation is promiscuous within this motif. Furthermore, CTL4 and CTLMA2 form higher oligomeric states at physiological pH. Both lectins bind specific sugars, including glycosaminoglycan motifs with β1-3/β1-4 linkages between glucose, galactose and their respective hexosamines. Small-angle x-ray scattering data supports a compact heterodimer between the CTL domains. Recombinant CTL4/CTLMA2 is found to function in vivo, reversing the enhancement of phenol oxidase activity in dsCTL4-treated mosquitoes. We propose these molecular features underline a common function for CTL4/CTLMA2 in mosquitoes, with species and strain-specific variation in degrees of activity in response to Plasmodium infection.
A lower bound on the hypergraph Ramsey number R(4,5;3)
Creators: name: Dybizbański, Janusz
Publisher: name: Faculty of Science, University of Calgary
Year: 2018
Subjects: Ramsey numbers

description: The finite version of Ramsey's theorem says that for positive integers r, k, a_1,... ,a_r, there exists a least number n=R(a_1, \ldots, a_r; k) so that if X is an n-element set and all k-subsets of X are r-coloured, then there exists an i and an a_i-set A so that all k-subsets of A are coloured with the ith colour.

In this paper, the bound R(4, 5; 3) >= 35 is shown by using a SAT solver to construct a red--blue colouring of the triples chosen from a 34-element set.
description: Contributions to Discrete Mathematics, Vol 13, No 2 (2018)
Entanglement generation by interaction with semiclassical radiation
Creators: name: Leshem, Amir
name: Gat, Omri
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address a fundamental issue in quantum mechanics and quantum information theory, the generation of an entangled pair of qubits that interact solely through a third, semiclassical degree of freedom, in the framework of cavity quantum electrodynamics. We show that finite, though not maximal, entanglement is obtainable in the classical limit, at the price of a diverging effective interaction time. The optimal atomic entanglement derives from a trade-off between the atomic entanglement in a sub-wave packet and the purity of the atomic state. Decoherence by photon loss sets an upper limit on the degree of excitation of the cavity mode, beyond which the achievable entanglement decreases as the inverse mean photon number to the sixth power.
description: 6 pages, 4 figures
Additional file 1: of Thrombopoietin knock-in augments platelet generation from human embryonic stem cells
Creators: name: Zhang, Leisheng
name: Liu, Cuicui
name: Wang, Hongtao
name: Wu, Dan
name: Su, Pei
name: Wang, Mengge
name: Guo, Jiaojiao
name: Zhao, Shixuan
name: Dong, Shuxu
name: Zhou, Wen
name: Arakaki, Cameron
name: Zhang, Xiaobing
name: Zhou, Jiaxi
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: Additional Information. Additional Figure Legends, Additional Experimental Procedures, Additional Tables S1â S3, and Additional References. (DOCX 44 kb)
How Activism correlates with Well-Being in Adolescence: a Systematic Review
Creators: name: Testa, Damiano
name: Cavallini, Francesca
Publisher: name: Journal of Clinical & Developmental Psychology
Year: 2021

description: Background: The evidence shows that activism in adolescents is positively correlated with mental health and well- being, but there is a lack of in-depth research about this correlation. There are just a few studies, however, that refer to adolescent activism as a specific shape of social engagement, positively correlated to a multitude of well-being outcomes. Methods: The present study aim to analyze correlation between activism and well-being during the adolescence by reviewing studies from the past 10 years to better analyze the impact of these topics on nowadays situation and to hypothesize the direction of it in the near future. Results: Analyzing these studies, it emerged that activism during adolescence has been researched as a phenomenon that acts on various shades of well-being, both at a personal and a collective level. Among the selected studies, only one shows that activism is linked to more health-risk behaviors, rather than mental health. Conclusions: Creating a group environment that enables adolescents to build up their knowledge and personal craving, work jointly on issues of bilateral interest, build skills, and increase social connections not only may lead to tangible social change but could also have significant psychological benefits for the young people involved.
description: Journal of Clinical & Developmental Psychology, Online First Articles
Reliable Confidence Intervals for RelTime Estimates of Evolutionary Divergence Times
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2020
Subjects: divergence times
confidence intervals
non-Bayesian methods
molecular evolution

description: © 2019 The Author(s). Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. Confidence intervals (CIs) depict the statistical uncertainty surrounding evolutionary divergence time estimates. They capture variance contributed by the finite number of sequences and sites used in the alignment, deviations of evolutionary rates from a strict molecular clock in a phylogeny, and uncertainty associated with clock calibrations. Reliable tests of biological hypotheses demand reliable CIs. However, current non-Bayesian methods may produce unreliable CIs because they do not incorporate rate variation among lineages and interactions among clock calibrations properly. Here, we present a new analytical method to calculate CIs of divergence times estimated using the RelTime method, along with an approach to utilize multiple calibration uncertainty densities in dating analyses. Empirical data analyses showed that the new methods produce CIs that overlap with Bayesian highest posterior density intervals. In the analysis of computer-simulated data, we found that RelTime CIs show excellent average coverage probabilities, that is, the actual time is contained within the CIs with a 94% probability. These developments will encourage broader use of computationally efficient RelTime approaches in molecular dating analyses and biological hypothesis testing.
First Observation of the Directed Flow of D-0 and in Au +Au Collisions at root s(NN)=200 GeV
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: STAR Collaboration

description: We report the first measurement of rapidity-odd directed flow (v_{1}) for D^{0} and D^{0}[over ¯] mesons at midrapidity (|y|<0.8) in Au+Au collisions at sqrt[s_{NN}]=200 GeV using the STAR detector at the Relativistic Heavy Ion Collider. In 10-80% Au+Au collisions, the slope of the v_{1} rapidity dependence (dv_{1}/dy), averaged over D^{0} and D^{0}[over ¯] mesons, is -0.080±0.017(stat)±0.016(syst) for transverse momentum p_{T} above 1.5 GeV/c. The absolute value of D^{0} meson dv_{1}/dy is about 25 times larger than that for charged kaons, with 3.4σ significance. These data give a unique insight into the initial tilt of the produced matter, and offer constraints on the geometric and transport parameters of the hot QCD medium created in relativistic heavy-ion collisions.
Szemer'edi's regularity lemma revisited
Creators: name: Tao, Terence
Publisher: name: Faculty of Science, University of Calgary
Year: 2006

description: Szemer'edi's regularity lemma is a basic tool in graph theory, and also plays an important role in additive combinatorics, most notably in proving Szemer\'edi's theorem on arithmetic progressions .  In this note we revisit this lemma from the perspective of probability theory and information theory instead of graph theory, and observe a variant of this lemma which introduces a new parameter $F$.  This stronger version of the regularity lemma was iterated in a recent paper of the author to reprove

the analogous regularity lemma for hypergraphs.
description: Contributions to Discrete Mathematics, Vol 1, No 1 (2006)
Quantitative examination of the bone health status of older adults with intellectual and developmental disability in Ireland: A cross-sectional nationwide study
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: bone health
fracture
intellectual disability
osteoporosis
quantitative ultrasound
Absorptiometry, Photon
Adult
Aged
Bone Density
Cross-Sectional Studies
Developmental Disabilities
Female
Humans
Intellectual Disability
Ireland
Male
Middle Aged
Osteoporosis
Osteoporotic Fractures
Prevalence
Surveys and Questionnaires
Ultrasonography

description: © Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ. Objectives (1) To investigate the prevalence of osteopenia and osteoporosis among adults with intellectual disabilities (IDs) and (2) to examine alternative optimal bone screening techniques. Design Observational cross-sectional study. Setting Wave 2 (2013-2106) of the Intellectual Disability Supplement to the Irish Longitudinal Study on Ageing. Participants A national representative sample of 604 male and female persons with ID aged 43 years and over. In total, 575 participants completed quantitative ultrasound (QUS) measurements for one or both feet. Outcome measures Participants underwent health assessments consisting of eight objective health measures including the standardised QUS of the calcaneus bone using a GE Lunar Achilles. A preinterview questionnaire and face-to-face interview were also completed. Results Objectively QUS identified poorer rates of bone health in people with ID overall with 74% indicating evidence of osteopenia (33.2%) or osteoporosis (41%). Females scored lower than males in the QUS t-scores a '2.208 (±1.77) versus a '1.78(±1.734). Bone status was stratified by gender (p=0.114), age (p=0.003), level of ID (p<0.0001) and living circumstance (p<0.0001). Conclusions This study has shown the prevalence of poor bone health in people with ID is substantial implying an increased risk of fracture due to reduced skeletal integrity. QUS screening has been shown to be useful when combined with clinical risk factors.
Additional file 3: of Thrombopoietin knock-in augments platelet generation from human embryonic stem cells
Creators: name: Zhang, Leisheng
name: Liu, Cuicui
name: Wang, Hongtao
name: Wu, Dan
name: Su, Pei
name: Wang, Mengge
name: Guo, Jiaojiao
name: Zhao, Shixuan
name: Dong, Shuxu
name: Zhou, Wen
name: Arakaki, Cameron
name: Zhang, Xiaobing
name: Zhou, Jiaxi
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Developmental Biology
subject: Hematology
subject: Computational Biology

description: Figure S2. TPO-KI accelerates early hematopoiesis of hESCs. HPCs for indicated times confirmed and quantified by flow cytometry, cell counting, or hematopoietic colony-forming analysis. (PDF 266 kb)
Connecting the dots of a moving image : future teachers' undergraduate experiences with science
Creators: name: Bergere, Trudy Leigh
Publisher: name: University of British Columbia
Year: 2011

description: Elementary students are taught science by teachers from social sciences and humanities backgrounds, begging the question about when and how these elementary teachers learn science content. This study explores the experiences of four future teachers in Bachelor of Arts (BA) science elective courses. More specifically, in terms of their perspectives as non-science majors learning science, their conceptions about the nature of science, and their views about how activities in their university classroom might apply to their future careers. The methodological framework borrows from Giorgi’s phenomenological inquiry as one way to interrogate students’ experiences in a university science course. Aikenhead’s Border Crossing perspective emerged as an interpretive frame to understand student’s experiences as lived. Data collected from interviews and personal journal testimonies led to individual stories about four future teachers, represented by unique metaphors from the natural world. The stories are not the same, nor is there an intention to represent universal generalizations about all future teachers. The analysis resulted in the generation of a Structures Table that locates particular characteristics or traits of aspiring teachers across a spectrum of possibilities that might be informative for science education instructors responsible for similar programs or courses. In addition, interpretation of Aikenhead’s Border Crossing perspective prompted the creation of a Border Crossing map that might also be of use to science educators. Further, the analysis illustrated that the participants: held preconceptions that learning science was hard, complex, and boring; perceptions of science varied between something independent of human perception to something that was embedded in the culture in which it was constructed; social science backgrounds and their interest in environmental issues influenced how they viewed the usefulness of scientific knowledge; felt that learning science is most effective through direct, hands-on activities; and were most engaged when they could make direct connections between the content of the courses and their future career as classroom teachers. Attention to improving science learning for future teachers during the earliest phase of their university experiences may facilitate developing teachers of science who pass on their vision of science as a tentative, subjective, creative and socio-cultural pursuit.
Classification of linear codes exploiting an invariant
Creators: name: Marcugini, Stefano
name: Milani, Alfredo
name: Pambianco, Fernanda
Publisher: name: Faculty of Science, University of Calgary
Year: 2006

description: We consider the problem of computing the equivalence classes of a set of

linear codes. This problem arises when new codes are obtained extending

codes of lower dimension. We propose a technique that, exploiting an

invariant simple to compute, allows to reduce the computational complexity

of the classification process. Using this technique the [13,5,8]_7, the 

[14,5,9]_8 and the [15,4,11]_9 codes have been classified. These

classifications enabled us to solve the packing problem for NMDS codes for 

q=7,8,9. The same technique can be applied to the problem of the

classification of other structures.
description: Contributions to Discrete Mathematics, Vol 1, No 1 (2006)
How do employees conceptualize fit?: development of a multidimensional measure of subjective person-organization fit
Creators: name: Piasentin, Kelly A.
Publisher: name: University of Calgary
Year: 2007

description: Bibliography: p. 137-159
description: The primary goal of this research was to obtain a better understanding of how employees experience P-O fit. Specific questions investigated in this research were: (1) How many dimensions are associated with subjective P-O fit? (2) Are the different dimensions related to distinct types of work attitudes and behaviours? And (3) do individual differences moderate the relationship between fit dimensions and work outcomes? Using established psychometric procedures for scale development, three multiphase studies were conducted. In Study 1, an initial pool of items was generated using a variety of techniques including qualitative interviews with employees and traditional deductive approaches. These items were then reviewed for content validity by a panel of subject matter experts. In Study 2, the items were administered to a sample of 196 employed undergraduate students and tested in an exploratory factor analysis for the purpose of initial item reduction and examination of the factor structure. In Study 3, the items were tested on a new sample of 226 employees to confirm the factor structure through structural equation modeling and to examine evidence of construct and predictive validity. The results of these studies showed that there are five distinct dimensions associated with subjective P-O fit: needs-supplies, demands-abilities, supplementary employee, complementary, and supplementary-organization. These factors, which comprised 30 items, demonstrated evidence of content validity, consistent factor structures, and reliabilities above the recommended level for new scales. The scales also showed evidence of both convergent and discriminant validity and correlated well with other variables within the nomological network including job satisfaction, job involvement, perceived organizational support, affective organizational commitment, organizational citizenship behaviour, and job search behaviour. Limited support was found for the hypothesis that individual differences in (a) self-esteem, (b) need motivations, and ( c) self-construal would moderate the relationship between fit perceptions and work outcomes.
Nexus of Stochastic and Deterministic Processes on Microbial Community Assembly in Biological Systems
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: community assembly
deterministic processes
microbial ecology
neutral theory
stochastic processes

description: Microbial community assembly in engineered biological systems is often simultaneously influenced by stochastic and deterministic processes, and the nexus of these two mechanisms remains to be further investigated. Here, three lab-scale activated sludge reactors were seeded with identical inoculum and operated in parallel under eight different sludge retention time (SRT) by sequentially reducing the SRT from 15 days to 1 day. Using 16S rRNA gene amplicon sequencing data, the microbial populations at the start-up (15-day SRT) and SRT-driven (≤10-day SRT) phases were observed to be noticeably different. Clustering results demonstrated ecological succession at the start-up phase with no consistent successional steps among the three reactors, suggesting that stochastic processes played an important role in the community assembly during primary succession. At the SRT-driven phase, the three reactors shared 31 core operational taxonomic units (OTUs). Putative primary acetate utilizers and secondary metabolizers were proposed based on K-means clustering, network and synchrony analysis. The shared core populations accounted for 65% of the total abundance, indicating that the microbial communities at the SRT-driven phase were shaped predominantly by deterministic processes. Sloan's Neutral model and a null model analysis were performed to disentangle and quantify the relative influence of stochastic and deterministic processes on community assembly. The increased estimated migration rate in the neutral community model and the higher percentage of stochasticity in the null model implied that stochastic community assembly was intensified by strong deterministic factors. This was confirmed by the significantly different α- and β-diversity indices at SRTs shorter than 2 days and the observation that over half of the core OTUs were unshared or unsynchronized. Overall, this study provided quantitative insights into the nexus of stochastic and deterministic processes on microbial community assembly in a biological process.
title: Ein (West-)Berliner Blick auf die ADLAF
Creators: name: Nitsch, Manfred
Publisher: name: Iberoamericana/Vervuert
Year: 2019
Subjects: subject: 300

description: Bibliotheca Ibero-Americana, vol. 17250 Jahre Arbeitsgemeinschaft Deutsche Lateinamerikaforschung ADLAF, p. 189
Holographic Entanglement Entropy in P-wave Superconductor Phase Transition
Creators: name: Cai, Rong-Gen
name: He, Song
name: Li, Li
name: Zhang, Yun-Long
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Superconductivity (cond-mat.supr-con)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the behavior of entanglement entropy across the holographic p-wave superconductor phase transition in an Einstein-Yang-Mills theory with a negative cosmological constant. The holographic entanglement entropy is calculated for a strip geometry at AdS boundary. It is found that the entanglement entropy undergoes a dramatic change as we tune the ratio of the gravitational constant to the Yang-Mills coupling, and that the entanglement entropy does behave as the thermal entropy of the background black holes. That is, the entanglement entropy will show the feature of the second order or first order phase transition when the ratio is changed. It indicates that the entanglement entropy is a good probe to investigate the properties of the holographic phase transition.
description: 19 pages,15 figures, extended discussion in Sec.5, references added
Understanding Utility and Privacy of Demographic Data in Education Technology by Causal Analysis and Adversarial-Censoring
Creators: name: Hasan, Rakibul
name: Fritz, Mario
Publisher: name: CISPA
Year: 2023

description: Education technologies (EdTech) are becoming pervasive due to their cost-effectiveness, accessibility, and scalability. They also experienced accelerated market growth during the recent pandemic. EdTech collects massive amounts of students’ behavioral and (sensitive) demographic data, often justified by the potential to help students by personalizing education. Researchers voiced concerns regarding privacy and data abuses (eg, targeted advertising) in the absence of clearly defined data collection and sharing policies. However, technical contributions to alleviating students’ privacy risks have been scarce. In this paper, we argue against collecting demographic data by showing that gender—a widely used demographic feature—does not causally affect students’ course performance: arguably the most popular target of predictive models. Then, we show that gender can be inferred from behavioral data; thus, simply leaving them out does not protect students’ privacy. Combining a feature selection mechanism with an adversarial censoring technique, we propose a novel approach to create a ‘private’ version of a dataset comprising of fewer features that predict the target without revealing the gender, and are interpretive. We conduct comprehensive experiments on a public dataset to demonstrate the robustness and generalizability of our mechanism.
Best Simultaneous Diophantine Approximations under a Constraint on the Denominator
Creators: name: Aliev, Iskander
name: Gruber, Peter M
Publisher: name: Faculty of Science, University of Calgary
Year: 2006

description: We investigate the problem of best simultaneous Diophantine

approximation under a constraint on the denominator, as proposed by

Jurkat. New lower estimates for optimal approximation constants are

given in terms of critical determinants of suitable star bodies.

Tools are results on simultaneous Diophantine approximation of

rationals by rationals with smaller denominator. Finally, the

approximation results are applied to the decomposition of integer

vectors.
description: Contributions to Discrete Mathematics, Vol 1, No 1 (2006)
LPTD: Achieving lightweight and privacy-preserving truth discovery in CIoT
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: CIoT
Truth discovery
Lightweight
Privacy-preserving

description: © 2018 Elsevier B.V. In recent years, cognitive Internet of Things (CIoT) has received considerable attention because it can extract valuable information from various Internet of Things (IoT) devices. In CIoT, truth discovery plays an important role in identifying truthful values from large scale data to help CIoT provide deeper insights and value from collected information. However, the privacy concerns of IoT devices pose a major challenge in designing truth discovery approaches. Although existing schemes of truth discovery can be executed with strong privacy guarantees, they are not efficient or cannot be applied in real-life CIoT applications. This article proposes a novel framework for lightweight and privacy-preserving truth discovery called LPTD-I, which is implemented by incorporating fog and cloud platforms, and adopting the homomorphic Paillier encryption and one-way hash chain techniques. This scheme not only protects devices’ privacy, but also achieves high efficiency. Moreover, we introduce a fault tolerant (LPTD-II) framework which can effectively overcome malfunctioning CIoT devices. Detailed security analysis indicates the proposed schemes are secure under a comprehensively designed threat model. Experimental simulations are also carried out to demonstrate the efficiency of the proposed schemes.
Additional file 1 of Identification of differentially methylated genes as diagnostic and prognostic biomarkers of breast cancer
Creators: name: Mao, Xiao-hong
name: Ye, Qiang
name: Zhang, Guo-bing
name: Jiang, Jin-ying
name: Zhao, Hong-ying
name: Shao, Yan-fei
name: Ye, Zi-qi
name: Xuan, Zi-xue
name: Huang, Ping
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Plant Biology

description: Additional file 1: Table S1. The information of all samples. Table S2. A total of 23 differentially methylated sites were identified.
Digging Droughts: Maasai and Palaeoanthropological Knowledge, Subsistence, and Collaboration in Oldupai Gorge, Tanzania
Creators: name: Lee, Patrick
Publisher: name: Arts
Year: 2018
Subjects: subject: Olduvai
subject: Oldupai
subject: Maasai
subject: Palaeoanthropology
subject: Enactment
subject: Drought
subject: Actor-network-theory
subject: Ontology
subject: Epistemology
subject: Collaboration
subject: Modernity
subject: Oral traditions
subject: Postcolonial archaeology
subject: Black boxes
subject: Knowledge
subject: Pastoralism
subject: Subsistence
subject: Tanzania
subject: Ethnography
subject: Archaeology
subject: Science and technology studies
subject: Conservation
subject: Political ecology
subject: Cultural anthropology
subject: Ethnobotany
subject: Standardized package
subject: Eseriani
subject: Anthropology
subject: FOS: Sociology
subject: Archaeology
subject: Anthropology--Cultural
subject: History--African
subject: History of Science

description: Tanzania’s Oldupai Gorge is a flagship human origins research destination, yet less recognised is that the Maasai inhabit the region. This thesis uses actor-network-theory to ethnographically compare palaeoanthropological and Maasai epistemology and ontology in Oldupai, and to understand why collaboration between the groups has been sporadic. Researchers and locals constructed knowledge in equally logical forms, combining established facts and artefacts with novel data to produce new facts and artefacts. Instead of fundamental epistemic disparities, the content of each group’s knowledge differed, and this content was tied to subsistence strategies and culture. Scientists and the Maasai acquired resources in non-scientific and non-pastoral worlds to support their respective livelihoods, and multiplied ontologies by enacting composite – yet conflicting – versions of hybrid drought. Even though both groups dug in Oldupai, palaeoanthropological and Maasai subsistence exigencies have precluded meaningful collaboration. However, mutually beneficial partnerships are emerging in the birthplace of humanity.
The radiation pattern of a QCD antenna in a dense medium
Creators: name: Mehtar-Tani, Yacine
name: Salgado, Carlos A.
name: Tywoniuk, Konrad
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the radiation spectrum off a qq-bar pair of a fixed opening angle theta_qq-bar traversing a medium of length L. Multiple interactions with the medium are handled in the harmonic oscillator approximation, valid for soft gluon emissions. We discuss the time-scales relevant to the decoherence of correlated partons traversing the medium and demonstrate how this relates to the hard scale that govern medium-induced radiation. For large angle radiation, the hard scale is given by Qhard = max(r_perp^{-1}, Qs), where r_perp = theta_qq-bar L is the probed transverse size and Qs is the maximal transverse momentum accumulated by the emitted gluon in the medium. These situations define in turn two distinct regimes, which we call "dipole" and "decoherence" regimes, respectively, and which are discussed in detail. A feature common to both cases is that coherence of the radiation is restored at large transverse momenta, k_\perp > Qhard.
description: 44 pages, 8 figures
On primitive symmetric association schemes with m_1=3
Creators: name: Bannai, Eiichi
name: Bannai, Etsuko
Publisher: name: Faculty of Science, University of Calgary
Year: 2006

description: We classify primitive symmetric association schemes with

m_1 = 3. Namely, it is shown that the tetrahedron, i.e., the association scheme of the complete graph K_4, is the unique such association scheme. Our proof of this result is based on the spherical embeddings of association schemes and elementary three dimensional Euclidean geometry.
description: Contributions to Discrete Mathematics, Vol 1, No 1 (2006)
title: Die ADLAF von morgen. Nachwuchsarbeit zwischen Initiative und Institutionalisierung (2009-2016)
Creators: name: Lemke, Ana-Laura
Publisher: name: Iberoamericana/Vervuert
Year: 2019
Subjects: subject: 300

description: Bibliotheca Ibero-Americana, vol. 17250 Jahre Arbeitsgemeinschaft Deutsche Lateinamerikaforschung ADLAF, p. 193
Ripples in a string coupled to Glauber spins
Creators: name: Bonilla, L L
name: Carpio, A
name: Prados, A
name: Rosales, R R
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Each oscillator in a linear chain (a string) interacts with a local Ising spin in contact with a thermal bath. These spins evolve according to Glauber dynamics. Below a critical temperature, a rippled state in the string is accompanied by a nonzero spin polarization. The system is shown to form ripples in the string which, for slow spin relaxation, vibrates rapidly about quasi-stationary states described as snapshots of a coarse-grained stroboscopic map. For moderate observation times, ripples are observed irrespective of the final thermodynamically stable state (rippled or not).
description: 5 pages, 2 figures
Uniquely circular colourable and uniquely fractional colourable graphs of large girth
Creators: name: Zhu, Xuding
name: Lin, Shuyuan
Publisher: name: Faculty of Science, University of Calgary
Year: 2006

description: Given any rational numbers $r \geq r' >2$ and an integer $g$, we

prove that there is a graph $G$ of girth at least $g$, which is

uniquely $r$-colourable and uniquely $r'$-fractional colourable.
description: Contributions to Discrete Mathematics, Vol 1, No 1 (2006)
Long-term biocompatibility of fluorescent diamonds-(NV)-Z~800 nm in rats: Survival, morbidity, histopathology, particle distribution and excretion studies (part IV)
Creators: name: (:Unkn) Unknown
Publisher: name: My University
Year: 2019
Subjects: nanocarbon particles
biocompatibility
liver toxicology
ex vivo IR organ imaging

description: © 2019 Barone et al. Background: Thromboembolic events are a major cause of heart attacks and strokes. However, diagnosis of the location of high risk vascular clots is hampered by lack of proper technologies for their detection. We recently reported on bio-engineered fluorescent diamond-(NV)-Z~800nm (FNDP-(NV)) conjugated with bitistatin (Bit) and proven its ability to identify iatrogenic blood clots in the rat carotid artery in vivo by Near Infra-Red (NIR) monitored by In Vivo Imaging System (IVIS). Purpose: The objective of the present research was to assess the in vivo biocompatibility of FNDP-(NV)-Z~800nm infused intravenously to rats. Multiple biological variables were assessed along this 12 week study commissioned in anticipation of regulatory requirements for a long-term safety assessment. Methods: Rats were infused under anesthesia with aforementioned dose of the FNDP-(NV), while equal number of animals served as control (vehicle treated). Over the 12 week observation period rats were tested for thriving, motor, sensory and cognitive functions. At the termination of study, blood samples were obtained under anesthesia for comprehensive hematology and biochemical assays. Furthermore, 6 whole organs (liver, spleen, brain, heart, lung and kidney) were collected and examined ex vivo for FNDP-NV) via NIR monitored by IVIS and histochemical inspection. Results: All animals survived, thrived (no change in body and organ growth). Neuro-behavioral functions remain intact. Hematology and biochemistry (including liver and kidney functions) were normal. Preferential FNDP-(NV) distribution identified the liver as the main long-term repository. Certified pathology reports indicated no outstanding of finding in all organs. Conclusion: The present study suggests outstanding biocompatibility of FNDP-(NV)-Z~800nm after long-term exposure in the rat.
Resolving the terrestrial planet forming regions of HD113766 and HD172555 with MIDI
Creators: name: Smith, R.
name: Wyatt, M. C.
name: Haniff, C. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present new MIDI interferometric and VISIR spectroscopic observations of HD113766 and HD172555. Additionally we present VISIR 11um and 18um imaging observations of HD113766. These sources represent the youngest (16Myr and 12Myr old respectively) debris disc hosts with emission on <<10AU scales. We find that the disc of HD113766 is partially resolved on baselines of 42-102m, with variations in resolution with baseline length consistent with a Gaussian model for the disc with FWHM of 1.2-1.6AU (9-12mas). This is consistent with the VISIR observations which place an upper limit of 0."14 (17AU) on the emission, with no evidence for extended emission at larger distances. For HD172555 the MIDI observations are consistent with complete resolution of the disc emission on all baselines of lengths 56-93m, putting the dust at a distance of >1AU (>35mas). When combined with limits from TReCS imaging the dust at ~10um is constrained to lie somewhere in the region 1-8AU. Observations at ~18um reveal extended disc emission which could originate from the outer edge of a broad disc, the inner parts of which are also detected but not resolved at 10um, or from a spatially distinct component. These observations provide the most accurate direct measurements of the location of dust at 1-8AU that might originate from the collisions expected during terrestrial planet formation. These observations provide valuable constraints for models of the composition of discs at this epoch and provide a foundation for future studies to examine in more detail the morphology of debris discs.
description: 22 pages, 19 figures, accepted for publication in MNRAS
RelaxLoss: Defending Membership Inference Attacks without Losing Utility
Creators: name: Chen, Dingfan
name: Yu, Ning
name: Fritz, Mario
Publisher: name: CISPA
Year: 2023

description: As a long-term threat to the privacy of training data, membership inference attacks (MIAs) emerge ubiquitously in machine learning models. Existing works evidence strong connection between the distinguishability of the training and testing loss distributions and the model's vulnerability to MIAs. Motivated by existing results, we propose a novel training framework based on a relaxed loss (RelaxLoss) with a more achievable learning target, which leads to narrowed generalization gap and reduced privacy leakage. RelaxLoss is applicable to any classification model with added benefits of easy implementation and negligible overhead. Through extensive evaluations on five datasets with diverse modalities (images, medical data, transaction records), our approach consistently outperforms state-of-the-art defense mechanisms in terms of resilience against MIAs as well as model utility. Our defense is the first that can withstand a wide range of attacks while preserving (or even improving) the target model's utility.
Induced Subgraphs of Bounded Degree and Bounded Treewidth
Creators: name: Bose, Prosenjit
name: Dujmovic', Vida
name: Wood, David R.
Publisher: name: Faculty of Science, University of Calgary
Year: 2006

description: We prove that for all integers $kgeq tgeq 0$ and $dgeq 2k$, every graph $G$ with treewidth at most $k$ has a `large' induced subgraph $H$, where $H$ has treewidth at most $t$ and every vertex in $H$ has degree at most $d$ in $G$. The order of $H$ depends on $t$, $k$, $d$, and the order of $G$. With $t=k$, we obtain large sets of bounded degree vertices. With $t=0$, we obtain large independent sets of bounded degree. In both these cases, our bounds on the order of $H$ are tight. For bounded degree independent sets in trees, we characterise the extremal graphs. Finally, we prove that an interval graph with maximum clique size $k$ has a maximum independent set in which every vertex has degree at most $2k$.
description: Contributions to Discrete Mathematics, Vol 1, No 1 (2006)
The massless string spectrum on AdS_3 x S^3 from the supergroup
Creators: name: Gaberdiel, Matthias R.
name: Gerigk, Sebastian
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: String theory on AdS_3 x S^3 is studied in the hybrid formulation. We give a detailed description of the PSL(2|2) supergroup WZW model that underlies the background with pure NS-NS flux, and determine the BRST-cohomology corresponding to the massless string states. The resulting spectrum is shown to match exactly with the expected supergravity answer, including the sectors with small KK momentum on the sphere.
description: 22 pages, 9 figures, LaTeX, v2: section 3.1 extended, reference added
Sum and product of different sets
Creators: name: Chang, Mei-Chu
Publisher: name: Faculty of Science, University of Calgary
Year: 2006

description: Let A and B be two finite sets of numbers.

The sum set and the product set of A, B are  A + B = {a + b : a in A, b in B}, and 

AB  = {ab : a in A, b in B}. $ We prove that A+B is as large as

possible when AA is not too big. Similarly, AB is large when

A+A is not too big. The methods rely on the Lambda_p constant

of A, bound on the number of factorizations in a generalized

progression containing A, and the subspace theorem.
description: Contributions to Discrete Mathematics, Vol 1, No 1 (2006)