cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Star Formation History of Leo T from Hubble Space Telescope Imaging
Creators: name: Weisz, Daniel R.
name: Zucker, Daniel B.
name: Dolphin, Andrew E.
name: Martin, Nicolas F.
name: de Jong, Jelte T. A.
name: Holtzman, Jon A.
name: Dalcanton, Julianne J.
name: Gilbert, Karoline M.
name: Williams, Benjamin F.
name: Bell, Eric F.
name: Belokurov, Vasily
name: Evans, N. Wyn
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the star formation history (SFH) of the faintest known star-forming galaxy, Leo T, based on imaging taken with the Hubble Space Telescope (HST) Wide Field Planetary Camera 2 (WFPC2). The HST/WFPC2 color-magnitude diagram (CMD) of Leo T is exquisitely deep, extending ~ 2 magnitudes below the oldest main sequence turnoff, permitting excellent constraints on star formation at all ages. We use a maximum likelihood CMD fitting technique to measure the SFH of Leo T assuming three different sets of stellar evolution models: Padova (solar-scaled metallicity) and BaSTI (both solar-scaled and alpha-enhanced metallicities). The resulting SFHs are remarkably consistent at all ages, indicating that our derived SFH is robust to the choice of stellar evolution model. From the lifetime SFH of Leo T, we find that 50% of the total stellar mass formed prior to z ~ 1 (7.6 Gyr ago). Subsequent to this epoch, the SFH of Leo T is roughly constant until the most recent ~ 25 Myr, where the SFH shows an abrupt drop. This decrease could be due to a cessation of star formation or stellar initial mass function sampling effects, but we are unable to distinguish between the two scenarios. Overall, our measured SFH is consistent with previously derived SFHs of Leo T. However, the HST-based solution provides improved age resolution and reduced uncertainties at all epochs. The SFH, baryonic gas fraction, and location of Leo T are unlike any of the other recently discovered faint dwarf galaxies in the Local Group, and instead bear strong resemblance to gas-rich dwarf galaxies (irregular or transition), suggesting that gas-rich dwarf galaxies may share common modes of star formation over a large range of stellar mass (~ 10^5-10^9 Msun).
description: 6 pages, 3 figures. Accepted to ApJ
A bipolar structure and shocks in V1309 Scorpii
Creators: name: Steinmetz, Thomas
Publisher: name: Zenodo
Year: 2023

description: V1309 Scorpii is a known example of a red nova, the result of the merging of two non-compact stars in a multiple system. V1309 Scorpii is the only example of such objects where the merging process, including the spiral-in phase of the progenitor binary, were photometrically observed. Therefore, V1309 Scorpii is a valuable testbed to examine how such objects evolve, and how the properties of the progenitor and the remnant are connected.
In this poster, we present the key results of a recently accepted paper studying the circumstellar environment surrounding the remnant star in V1309 Scorpii. Using ALMA band 7 data, we show that a two-component structure reminiscent of a bipolar outflow is seen in the kinematics of the ALMA spectrum, as well as the moment-1 maps of CO and SiO. We also detect the shock tracers HCO+ and ro-vibrational H2 in ALMA and optical spectra respectively, indicating interactions between the outflowing gas and the circumstellar medium. Furthermore, the lack of symmetry in the detection of the shock tracers in different directions along the lineof sight indicates an imhomogeneity in the kinematics and/or the chemistry of either the circumstellar environment, or the outflows. We conclude that V1309 Scorpii is a kineamtically and chemically complex object, with several questions left unanswered.
Patterns and privacy preservation with prior knowledge for classification
Creators: name: Bu, Shaofeng
Publisher: name: University of British Columbia
Year: 2010

description: Privacy preservation is a key issue in outsourcing of data mining. When we seek approaches to protect the sensitive information contained in the original data, it is also important to preserve the mining outcome. We study the problem of privacy preservation in outsourcing of classifications, including decision tree classification, support vector machine (SVM), and linear classifications. We investigate the possibility of guaranteeing no-outcome-change (NOC) and consider attack models with prior knowledge. We first conduct our investigation in the context of building decision trees. We propose a piecewise transformation approach using two central ideas of breakpoints and monochromatic pieces. We show that the decision tree is preserved if the transformation functions used for pieces satisfy the global (anti-)monotonicity. We empirically show that the proposed piecewise transformation approach can deliver a secured level of privacy and reduce disclosure risk substantially. We then propose two transformation approaches, (i) principled orthogonal transformation (POT) and (ii) true negative point (TNP) perturbation, for outsourcing SVM. We show that POT always guarantees no-outcome-change for both linear and non-linear SVM. The TNP approach gives the same guarantee when the data set is linearly separable. For linearly non-separable data sets, we show that no-outcome-change is not always possible and propose a variant of the TNP perturbation that aims to minimize the change to the SVM classifier. Experimental results show that the two approaches are effective to counter powerful attack models. In the last part, we extend the POT approach to linear classification models and propose to combine POT and random perturbation. We conduct a detailed set of experiments and show that the proposed combination approach could reduce the change on the mining outcome while still providing high level of protection on privacy by adding less noise. We further investigate the POT approach and propose a heuristic to break down the correlations between the original values and the corresponding transformed values of subsets. We show that the proposed approach could significantly improve the protection level on privacy in the worst cases.
Exploring Geometric Shapes with Touch
Creators: name: Pietrzak, Thomas
name: Crossan, Andrew
name: Brewster, Stephen A.
name: Martin, Benoît
name: Pecci, Isabelle
Publisher: name: arXiv
Year: 2012
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: We propose a new technique to help users to explore geometric shapes without vision. This technique is based on a guidance using directional cues with a pin array. This is an alternative to the usual technique that consists of raising the pins corresponding to dark pixels around the cursor. In this paper we compare the exploration of geometric shapes with our new technique in unimanual and bimanual conditions. The users made fewer errors in unimanual condition than in bimanual condition. However they did not explore the shapes more quickly and there was no difference in confidence in their answer.
Characterization and Emulation of Low-Voltage Power Line Channels for Narrowband and Broadband Communication
Creators: name: Han, Bin
Publisher: name: Karlsruhe
Year: 2016

description: This thesis proposes a set of novel approaches to characterize and to emulate LV power line channels in the frequency range from 0.15 to 10MHz, which close gaps between the traditional narrowband (up to 500 kHz) and broadband (above 1.8MHz) ranges.
Megophthalmidia amsemlili Chandler, Belqat & Banamar 2024
Creators: name: El Mouden, Mohamed Amin
name: Chandler, Peter J.
name: Saidoun, Imane
name: Driauach, Ouafaa
name: Belqat, Boutaïna
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Mycetophilidae
Megophthalmidia
Megophthalmidia amsemlili

description: Megophthalmidia amsemlili Chandler, Belqat & Banamar, 2024
Literature records.
Morocco – Middle Atlas Region • 1 ♂; Oued Taourirt; 20/V/2022; K. Aattouch, M. El Ouahabi and M. A. El Mouden leg; UAE-FST MA 22/2401 (El Mouden et al. 2024).
North African distribution.
Morocco (El Mouden et al. 2024).
description: Published as part of El Mouden, Mohamed Amin, Chandler, Peter J., Saidoun, Imane, Driauach, Ouafaa & Belqat, Boutaïna, 2025, A new species of Docosia Winnertz, 1864 and new records of fungus gnats (Diptera, Bolitophilidae, Keroplatidae and Mycetophilidae) from North Africa, pp. 349-379 in ZooKeys 1233 on pages 349-379, DOI: 10.3897/zookeys.1233.130502
Application of quasi-optimal weights to searches of anomalies. Statistical criteria for step-like anomalies in cumulative spectra
Creators: name: Lokhov, A. V.
name: Tkachov, F. V.
name: Trukhanov, P. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The statistical method of quasi-optimal weights can be used to derive criteria for searches of anomalies. As an example we derive a convenient statistical criterion for step-like anomalies in cumulative spectra such as measured in the Troitsk-nu-mass, Mainz and KATRIN experiments. It is almost as powerful as the locally most powerful one near the null hypothesis and appreciably excels the conventional chi^2 and Kolmogorov-Smirnov tests. It is also compared with an ad hoc criterion of «pairwise correlations of neighbours»; the latter is seen to be less powerful if more sensitive to more general anomalies. As a realistic example, the criteria are applied to the Troitsk-nu-mass data.
description: 9 pages
Advances on Concept Drift Detection in Regression Tasks using Social Networks Theory
Creators: name: Barddal, Jean Paul
name: Gomes, Heitor Murilo
name: Enembreck, Fabrício
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Mining data streams is one of the main studies in machine learning area due to its application in many knowledge areas. One of the major challenges on mining data streams is concept drift, which requires the learner to discard the current concept and adapt to a new one. Ensemble-based drift detection algorithms have been used successfully to the classification task but usually maintain a fixed size ensemble of learners running the risk of needlessly spending processing time and memory. In this paper we present improvements to the Scale-free Network Regressor (SFNR), a dynamic ensemble-based method for regression that employs social networks theory. In order to detect concept drifts SFNR uses the Adaptive Window (ADWIN) algorithm. Results show improvements in accuracy, especially in concept drift situations and better performance compared to other state-of-the-art algorithms in both real and synthetic data.
Revolving door: young offender activity and adolescents with fetal alcohol syndrome/fetal alcohol effect
Creators: name: Tanchak, Sherri L.
Publisher: name: Graduate Studies
Year: 2002
Subjects: subject: AC1 .T484 2002 T366

description: Bibliography: p. 132-153
description: This descriptive study explores the criminal activity amongst 86 adolescents in care of the Alberta Child Welfare system. In the sample, 53% of the records (child welfare and young offender) originate from adolescents with disability (excluding FAS/FAE), 7% from adolescents with FAS/FAE, 28% from adolescents with FAS/FAE and other disabilities, and 12% from adolescents with no identified disability. A profile for the sample was created by identifying frequencies in prevalence of disability, nature of criminal activity type (property, person, or other), nature of disposition, and disposition outcomes, and recidivistic activity. The Chi-Square Test yielded significant associations between disability and the dependent variables. Further statistical analysis showed significant variability between adolescents with FAS/FAE and other disabilities and adolescents with disabilities (excluding FAS/FAE) in nature of criminal activity and nature of disposition and insignificant variability between adolescents with FAS/FAE and other disabilities and adolescents with disabilities (excluding FAS/FAE) in disposition outcome and recidivistic activity.
Provisions of the Agriculture and Food Act of 1981
Creators: name: Johnson, James D.
name: Rizzi, Richard W.
name: Short, Sara D.
name: Fulton, R. Thomas
name: Johnson, James D.
name: Rizzi, Richard W.
name: Short, Sara D.
name: Fulton, R. Thomas
Publisher: name: Unknown
Year: 1982
Subjects: subject: Agricultural and Food Policy
subject: Program commodities
subject: loan levels
subject: target prices
subject: cropland reduction
subject: grain reserves
subject: food stamps
subject: agricultural research
subject: conservation
subject: trade

description: The Agriculture and Food Act of 1981 authorizes many farm programs for 4 years. This report summarizes its provisions by title. Commodity program provisions discussed for wheat, feed grains, cotton, rice, peanuts, soybeans, sugar, dairy, and wool and mohair include price supports, loan levels, disaster payments, and program acreage. Other provisions summarized include miscellaneous; grain reserves; the national agricultural cost of production standards review board; agricultural exports and P.L.-480; food stamps; research, extension, and teaching; resource conservation; credit, rural development, and family farms; floral research and consumer information.
The SunPy Project: An Interoperable Ecosystem for Solar Data Analysis
Creators: name: Community, The SunPy
name: Barnes, Will
name: Christe, Steven
name: Freij, Nabil
name: Hayes, Laura
name: Stansby, David
name: Ireland, Jack
name: Mumford, Stuart
name: Ryan, Daniel
name: Shih, Albert
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The SunPy Project is a community of scientists and software developers creating an ecosystem of Python packages for solar physics. The project includes the sunpy core package as well as a set of affiliated packages. The sunpy core package provides general purpose tools to access data from different providers, read image and time series data, and transform between commonly used coordinate systems. Affiliated packages perform more specialized tasks that do not fall within the more general scope of the sunpy core package. In this article, we give a high-level overview of the SunPy Project, how it is broader than the sunpy core package, and how the project curates and fosters the affiliated package system. We demonstrate how components of the SunPy ecosystem, including sunpy and several affiliated packages, work together to enable multi-instrument data analysis workflows. We also describe members of the SunPy Project and how the project interacts with the wider solar physics and scientific Python communities. Finally, we discuss the future direction and priorities of the SunPy Project.
description: 15 pages, 1 figure, published in Frontiers
Evaluation of Austin Community College’s Strengthening Institutions Program Grant: Annual Outcomes and Impact Report
Creators: name: Patnaik, Ashweeta
name: Cumpton, Greg
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Education

description: ACC proposes to establish an Office of Student Money Management (ACC-OSMM) – the office’s mission would be to give a stronger foundation to students’ academic and career goals and successes by helping them take charge of their financial futures.Two of the inaugural activities of ACC-OSMM will be: to establish a system of sending text message reminders regarding annual Free Application for Federal Student Aid (FAFSA) renewal to first-year college students who are already receiving financial aid, and to enhance the main tool (Degree Map Online) that ACC counselors use to advise students to include ‘real time’ personalized financial aid information. This will improve integration of financial aid and loan awareness into student conversations with academic advisors and counselors. ACC hopes to demonstrate that the activities of ACC-OSMM would be linked to improvements in measures of student success such as: graduation rate, time to completion, retention/persistence, and cohort loan default rate (CDR). ACC will partner with the Ray Marshall Center (RMC) to perform an evaluation, both formative and summative, on the effectiveness of these efforts on the student outcome measures of interest. Both types of evaluations provide actionable information about the success of the intervention while each successive cohort of recipients is in the process of receiving services, allowing for relatively rapid reflection and program modification as needed by ACC staff. Both evaluations are intended to measure the implementation, aggregate outcomes, and the impact of these efforts on Full Time First Time in College (FTFIC) loan or Pell grant receiving students’ graduation rates, 3-year Cohort Default Rates (CDR), retention rates, and fall to fall persistence for those who are Pell eligible. A host of intermediate steps related to these outcomes will also be measured.
Injection and detection of spin in a semiconductor by tunneling via interface states
Creators: name: Jansen, R.
name: Deac, A. M.
name: Saito, H.
name: Yuasa, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Injection and detection of spin accumulation in a semiconductor having localized states at the interface is evaluated. Spin transport from a ferromagnetic contact by sequential, two-step tunneling via interface states is treated not in itself, but in parallel with direct tunneling. The spin accumulation induced in the semiconductor channel is not suppressed, as previously argued, but genuinely enhanced by the additional spin current via interface states. Spin detection with a ferromagnetic contact yields a weighted average of the spin accumulation in the channel and in the localized states. In the regime where the spin accumulation in the localized states is much larger than that in the channel, the detected spin signal is insensitive to the spin accumulation in the localized states and the ferromagnet probes the spin accumulation in the semiconductor channel.
description: 7 pages, 2 figures. Theory only
TrustGuard: GNN-based Robust and Explainable Trust Evaluation with Dynamicity Support
Creators: name: Wang, Jie
name: Yan, Zheng
name: Lan, Jiahe
name: Bertino, Elisa
name: Pedrycz, Witold
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Trust evaluation assesses trust relationships between entities and facilitates decision-making. Machine Learning (ML) shows great potential for trust evaluation owing to its learning capabilities. In recent years, Graph Neural Networks (GNNs), as a new ML paradigm, have demonstrated superiority in dealing with graph data. This has motivated researchers to explore their use in trust evaluation, as trust relationships among entities can be modeled as a graph. However, current trust evaluation methods that employ GNNs fail to fully satisfy the dynamic nature of trust, overlook the adverse effects of trust-related attacks, and cannot provide convincing explanations on evaluation results. To address these problems, we propose TrustGuard, a GNN-based accurate trust evaluation model that supports trust dynamicity, is robust against typical attacks, and provides explanations through visualization. Specifically, TrustGuard is designed with a layered architecture that contains a snapshot input layer, a spatial aggregation layer, a temporal aggregation layer, and a prediction layer. Among them, the spatial aggregation layer adopts a defense mechanism to robustly aggregate local trust, and the temporal aggregation layer applies an attention mechanism for effective learning of temporal patterns. Extensive experiments on two real-world datasets show that TrustGuard outperforms state-of-the-art GNN-based trust evaluation models with respect to trust prediction across single-timeslot and multi-timeslot, even in the presence of attacks. In addition, TrustGuard can explain its evaluation results by visualizing both spatial and temporal views.
description: Accepted by IEEE TDSC. Code: https://github.com/Jieerbobo/TrustGuard
Generalization and Estimation Error Bounds for Model-based Neural Networks
Creators: name: Shultzman, Avner
name: Azar, Eyar
name: Rodrigues, Miguel R. D.
name: Eldar, Yonina C.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Model-based neural networks provide unparalleled performance for various tasks, such as sparse coding and compressed sensing problems. Due to the strong connection with the sensing model, these networks are interpretable and inherit prior structure of the problem. In practice, model-based neural networks exhibit higher generalization capability compared to ReLU neural networks. However, this phenomenon was not addressed theoretically. Here, we leverage complexity measures including the global and local Rademacher complexities, in order to provide upper bounds on the generalization and estimation errors of model-based networks. We show that the generalization abilities of model-based networks for sparse recovery outperform those of regular ReLU networks, and derive practical design rules that allow to construct model-based networks with guaranteed high generalization. We demonstrate through a series of experiments that our theoretical insights shed light on a few behaviours experienced in practice, including the fact that ISTA and ADMM networks exhibit higher generalization abilities (especially for small number of training samples), compared to ReLU networks.
Evaluation of Austin Community College’s Strengthening Institutions Program Grant: Implementation Evaluation Findings Through July 2019
Creators: name: Juniper, Cynthia
name: Cumpton, Greg
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Education

description: ACC proposes to establish an Office of Student Money Management (ACC-OSMM) – the office’s mission would be to give a stronger foundation to students’ academic and career goals and successes by helping them take charge of their financial futures.Two of the inaugural activities of ACC-OSMM will be: to establish a system of sending text message reminders regarding annual Free Application for Federal Student Aid (FAFSA) renewal to first-year college students who are already receiving financial aid, and to enhance the main tool (Degree Map Online) that ACC counselors use to advise students to include ‘real time’ personalized financial aid information. This will improve integration of financial aid and loan awareness into student conversations with academic advisors and counselors. ACC hopes to demonstrate that the activities of ACC-OSMM would be linked to improvements in measures of student success such as: graduation rate, time to completion, retention/persistence, and cohort loan default rate (CDR). ACC will partner with the Ray Marshall Center (RMC) to perform an evaluation, both formative and summative, on the effectiveness of these efforts on the student outcome measures of interest. Both types of evaluations provide actionable information about the success of the intervention while each successive cohort of recipients is in the process of receiving services, allowing for relatively rapid reflection and program modification as needed by ACC staff. Both evaluations are intended to measure the implementation, aggregate outcomes, and the impact of these efforts on Full Time First Time in College (FTFIC) loan or Pell grant receiving students’ graduation rates, 3-year Cohort Default Rates (CDR), retention rates, and fall to fall persistence for those who are Pell eligible. A host of intermediate steps related to these outcomes will also be measured.
Transverse nucleon structure and multiparton interactions
Creators: name: Strikman, Mark
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The transverse structure of the nucleon as probed in hard exclusive processes plays critical role in the understanding of the structure of the underlying event in hard collisions at the LHC, and multiparton interactions. We summarize results of our recent studies of manifestation of transverse nucleon structure in the hard collisions at the LHC, new generalized parton distributions involved in multiparton interactions, presence of parton fluctuations. The kinematic range where interaction of fast partons of the projectile with the target reach black disk regime (BDR) strength is estimated. We demonstrate that in the BDR postselection effect leads to effective fractional energy losses. This effect explains regularities of the single and double forward pion production in $ dAu$ collisions at RHIC and impacts on the forward physics in $pp$ collisions at the LHC.
description: 21 page, 10 figures, to be published in proceedings of the LI Cracow School of Theoretical Physics "Soft side of the LHC", Zakopane, Poland, June 11-19, 2011
The warm gas atmosphere of the HD 100546 disk seen by Herschel (Evidence of a gas-rich, carbon-poor atmosphere?)
Creators: name: Bruderer, Simon
name: van Dishoeck, Ewine F.
name: Doty, Steven D.
name: Herczeg, Gregory J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: (Abridged) Context. With the Herschel Space Observatory, lines of simple molecules (C+, O, and CO) have been observed in the atmosphere of protoplanetary disks. When combined with ground-based [CI], all principle forms of carbon can be studied. The absence of neutral carbon [CI], which is predicted by models to be strong, can then be interpreted together with [CII] and carbon monoxide. Aims. We study the gas temperature, excitation, and chemical abundance of the simple carbon-bearing species by the method of chemical-physical modeling. We explore the sensitivity of the lines to the entering parameters and constrain the region from which the line radiation emerges. Methods. Numerical models of the radiative transfer are used together with a chemical network simulation and a calculation of the gas energetics to obtain the gas temperature. We present our new model, which is based on our previous models but includes several improvements. Results. A model of the disk around the Herbig Be star HD 100546 is able to reproduce the CO ladder together with the atomic fine-structure lines of [OI] and either [CI] or [CII]. We find that the high-J lines of CO can only be reproduced by a warm atmosphere with Tgas>>Tdust. The high-J CO observable with PACS are dominated from regions within some tens of AU. Conclusions. Only a warm atmosphere with Tgas>>Tdust can reproduce the CO ladder. The CO ladder together with [O I] and the upper limit to [CI] can be reproduced by models with a high gas/dust ratio and a low abundance of volatile carbon. These models however produce too small amounts of [CII]. Models with a low gas/dust ratio and more volatile carbon also reproduce CO and [OI], are in closer agreement with observations of [CII], but overproduce [CI]. Due to the uncertain origin of the [CII] emission, we prefer the high gas/dust ratio models, indicating a low abundance of volatile carbon.
description: Accepted for publication in Astronomy and Astrophysics
Time-delayed nonsequential double ionization with few-cycle laser pulses: importance of the carrier-envelope phase
Creators: name: Faria, C. Figueira de Morisson
name: Shaaran, T.
name: Nygren, M. T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We perform theoretical investigations of laser-induced nonsequential double ionization with few cycle pulses, with particular emphasis on the dependence of the electron-momentum distributions on the carrier-envelope phase. We focus on the recollision-excitation with subsequent tunneling ionization (RESI) pathway, in which a released electron, upon return to its parent ion, gives part of its kinetic energy to promote a second electron to an excited state. At a subsequent time, the second electron is freed through tunneling ionization. We show that the RESI electron-momentum distributions vary dramatically with regard to the carrier-envelope phase. By performing a detailed analysis of the dynamics of the two active electrons in terms of quantum orbits, we relate the shapes and the momentum regions populated by such distributions to the dominant set of orbits along which rescattering of the first electron and ionization of the second electron occurs. These orbits can be manipulated by varying the carrier-envelope phase. This opens a wide range of possibilities for controlling correlated attosecond electron emission by an adequate pulse choice.
description: 12 pages, 7 figures, 1 table
Disorder Induced Limited Path Percolation
Creators: name: López, Eduardo
name: Braunstein, Lidia A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We introduce a model of percolation induced by disorder, where an initially homogeneous network with links of equal weight is disordered by the introduction of heterogeneous weights for the links. We consider a pair of nodes i and j to be mutually reachable when the ratio α_{ij} of length of the optimal path between them before and after the introduction of disorder does not increase beyond a tolerance ratio τ. These conditions reflect practical limitations of reachability better than the usual percolation model, which entirely disregards path length when defining connectivity and, therefore, communication. We find that this model leads to a first order phase transition in both 2-dimensional lattices and in Erdos-Renyi networks, and in the case of the latter, the size of the discontinuity implies that the transition is effectively catastrophic, with almost all system pairs undergoing the change from reachable to unreachable. Using the theory of optimal path lengths under disorder, we are able to predict the percolation threshold. For real networks subject to changes while in operation, this model should perform better in predicting functional limits than current percolation models.
description: 10 pages, 3 figures
ASASSN-18aan revisited
Creators: name: Nesci, Roberto
name: Vagnozzi, Antonio
name: Valentini, Stefano
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The light curve of the cataclismic variable ASASSN-18aan is studied using recent observations of the MC589 Observatory, giving an orbital Period and Epoch fully consistent with the data obtained after the discovery flare in 2018. Archival data from ASASSN, ZTF and Gaia were used to check if its flares have a quasi-periodic behaviour. A recurrency time scale of about 11 months is found, confirming a previous tentative result using the historic plate archive of the Asiago Observatory. The next outbursts are expected by April 2023 and March 2024.
description: 7 pages, 2 figures, published on OEJV
Gifted students' perceptions of multipotentiality among gifted students: a grounded theory analysis
Creators: name: Michelle-Pentelbury, R. F.
Publisher: name: Education
Year: 2003

description: Bibliography: p. 155-174.
description: This thesis is a summation of interviewing five gifted grade nine students who happen also to be multi-talented. A grounded theory research design integrated eleven questions about how these students, from a large Westem Canada city, relate to various aspects of being multi-talented. Major findings for these high-ability and multi-talented students were a strong autotelic work ethic, the support system of a similarly multi-talented family, effectively trained teachers, and the school's diversified curriculum within a congregated gifted and talented setting. All participants were highly critical of those who were perceived to be "wasting their talent". Data analysis on the participants' responses identified factors that influenced their strong work ethic: relationships with supporting teachers; involvement in extra-curricular activities on a multiple of playing fields; choice, opportunity for independent study, and special programs. Implications for teachers, for dispensing the curriculum, and for accommodating the needs of the multi-talented student are also presented.
The mass shell in the semi-relativistic Pauli-Fierz model
Creators: name: Könenberg, Martin
name: Matte, Oliver
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81Q10 (Primary) 47B25 (Secondary)

description: We consider the semi-relativistic Pauli-Fierz model for a single free electron interacting with the quantized radiation field. Employing a variant of Pizzo's iterative analytic perturbation theory we construct a sequence of ground state eigenprojections of infra-red cutoff, dressing transformed fiber Hamiltonians and prove its convergence, as the cutoff goes to zero. Its limit is the ground state eigenprojection of a certain Hamiltonian unitarily equivalent to a renormalized fiber Hamiltonian acting in a coherent state representation space. The ground state energy is an exactly two-fold degenerate eigenvalue of the renormalized Hamiltonian, while it is not an eigenvalue of the original fiber Hamiltonian unless the total momentum is zero. These results hold true, for total momenta inside a ball about zero of arbitrary radius p>0, provided that the coupling constant is sufficiently small depending on p and the ultra-violet cutoff. Along the way we prove twice continuous differentiability and strict convexity of the ground state energy as a function of the total momentum inside that ball.
description: 44 pages
Universal Casimir attraction between filaments at the cell scale
Creators: name: Spreng, Benjamin
name: Berthoumieux, Hélène
name: Lambrecht, Astrid
name: Bitbol, Anne-Florence
name: Neto, Paulo A. Maia
name: Reynaud, Serge
Publisher: name: arXiv
Year: 2023
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The electromagnetic Casimir interaction between dielectric objects immersed in salted water includes a universal contribution that is not screened by the solvent and therefore long-ranged. Here, we study the geometry of two parallel dielectric cylinders. We derive the Casimir free energy by using the scattering method. We show that its magnitude largely exceeds the thermal energy scale for a large parameter range. This includes length scales relevant for actin filaments and microtubules in cells. We show that the Casimir free energy is a universal function of the geometry, independent of the dielectric response functions of the cylinders, at all distances of biological interest. While multiple interactions exist between filaments in cells, this universal attractive interaction should have an important role in the cohesion of bundles of parallel filaments.
description: 15 pages, 9 figures. This paper extends the unpublished short report arXiv:2304.06006
Higgs cross sections: a brief overview
Creators: name: Grazzini, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I briefly review the status of theoretical predictions for the inclusive production of a Standard Model Higgs boson at hadron colliders. In particular, I focus on the main production channels: gluon-gluon fusion, vector boson fusion and associated production with a vector boson.
description: Invited talk given at the 2011 Hadron Collider Physics symposium (HCP-2011), Paris, France, November 14-18 2011, 6 pages, 1 figure
Dijkstra-like ordered upwind methods for solving static Hamilton-Jacobi equations
Creators: name: Alton, Ken
Publisher: name: University of British Columbia
Year: 2010

description: The solution of a static Hamilton-Jacobi Partial Differential Equation (HJ PDE) can be used to determine the change of shape in a surface for etching/deposition/lithography applications, to provide the first-arrival time of a wavefront emanating from a source for seismic applications, or to compute the minimal-time trajectory of a robot trying to reach a goal. HJ PDEs are nonlinear so theory and methods for solving linear PDEs do not directly apply. An efficient way to approximate the solution is to emulate the causal property of this class of HJ PDE: the solution at a particular point only depends on values backwards along the characteristic that passes through that point and solution values always increase along characteristics. In our discretization of the HJ PDE we enforce an analogous causal property, that the solution value at a grid node may only depend on the values of nodes in its numerical stencil which are smaller. This causal property is related but not the same thing as an upwinding property of schemes for time dependent problems. The solution to such a discretized system of equations can be efficiently computed using a Dijkstra-like method in a single pass through the grid nodes in order of nondecreasing value. We develop two Dijkstra-like methods for solving two subclasses of static HJ PDEs. The first method is an extension of the Fast Marching Method for isotropic Eikonal equations and it can be used to solve a class of axis-aligned anisotropic HJ PDEs on an orthogonal grid. The second method solves general convex static HJ PDEs on simplicial grids by computing stencils for a causal discretization in an initial pass through the grid nodes, and then solving the discretization in a second Dijkstra-like pass through the nodes. This method is suitable for computing solutions on highly nonuniform grids, which may be useful for extending it to an error-control method based on adaptive grid refinement.
Model independent constraints on leptoquarks from b -> s l+ l- processes
Creators: name: Kosnik, Nejc
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We list all scalar and vector leptoquark states that contribute to the b -> s l+ l- effective Hamiltonian. There are altogether three scalar and four vector leptoquarks that are relevant. For contribution of each state we infer the correlations between effective operators and find that only two baryon number-violating vector leptoquarks give rise to scalar and pseudoscalar four-fermion operators, whereas the scalar states can contribute to those operators only when two states with same charge are present. We bound the resulting Wilson coefficients by imposing experimental constraints coming from branching fractions of B -> K l+ l-, B_s -> mu+ mu-, and B -> X_s mu+ mu- decays.
description: 10 pages, 3 figures, 1 table; v2: minor corrections, added references
Structural basis for the function of the Bcr-Abl protein substrate CrkL and human-CrkII as a novel partner for Cyclophilin A
Creators: name: Jankowski, Wojciech
Publisher: name: No Publisher Supplied
Year: 2012

description: Adaptor proteins are known to play an essential role in assembling protein-protein complexes which result in cellular signal propagation. Crk belongs to a family of adaptor proteins and was originally identified as an oncogene product of the CT10 retrovirus (v-Crk). Cellular homologues of v-Crk include CrkI, CrkII and CrkL. CrkI and CrkII are different splice variants, whereas CrkL is encoded by a distinct gene. Crk proteins contain one Src homology 2 (SH2) and one or two Src homology 3 (SH3) domains. Specific domain organization can assemble and activate a number of different ligands, including Abl. It remains poorly understood why CrkII and CrkL have distinct physiological roles despite showing similar domain structures, high sequence identity, and identical binding partners. Unlike CrkII, CrkL was found to be a key signaling molecule to interact with Bcr-Abl, which is a tyrosine kinase that plays a major role in Chronic Myeloid Leukemia(CML) pathogenesis. The interaction of CrkL with Bcr-Abl and its potent tyrosine phosphorylation (higher as compared to CrkII) is commonly used as a hallmark of Bcr-Abl kinase activity and response to tyrosine kinase inhibitors used in CML treatment. Knowing the differences in 3-dimensional structures between CrkII and CrkL would help to understand how these adaptors alter key signaling partners. However, the structure of CrkL is not available. Using NMR spectroscopy methodologies complemented by many other biochemical and biophysical techniques, we show that CrkL and phosphorylated CrkL structures are radically different from the corresponding structures of CrkII. The phosphorylation of Tyr221 (CrkII) and Tyr207 (CrkL) by Abl induces intramolecular binding to the SH2 domain, which in the case of phosphorylated CrkII was shown to completely abrogate signal transduction. In phosphorylated CrkL, however, the SH3N domain remains accessible and can form complexes. The data show that CrkL, unlike CrkII, forms a constitutive complex with Abl hence explaining the preference of Bcr-Abl for CrkL over CrkII. The results also highlight how the structural organization of the modular domains in adaptor proteins can control signaling outcome. In the second part we show that the Gly219−Pro220 motif of CrkII binds into theactive site cleft of CypA. In contrast, CrkL does not contain this GP motif and therefore, is not susceptible to CypA regulation. The interaction between CypA and CrkII occurs both in vitro and in vivo. CypA is recruited to the CrkII phosphorylation site (Tyr221), and delays phosphorylation by Abl. This is a novel role for CypA, which appears to act as a selective switch to modulate the level of phosphorylation of a signaling protein.
title: Synthesis and Characterization of 40 wt % Ce₀.₉Pr₀.₁O₂−δ−60 wt % NdxSr₁₋ₓFe₀.₉Cu₀.₁O₃−δ Dual-Phase Membranes for Efficient Oxygen Separation
Creators: name: Chen, Guoxing
name: Zhao, Zhijun
name: Widenmeyer, Marc
name: Yan, Ruijuan
name: Wang, Ling
name: Feldhoff, Armin
name: Weidenkaff, Anke
Publisher: name: MDPI
Year: 2023

description: Dense, H₂- and CO₂-resistant, oxygen-permeable 40 wt % Ce₀.₉Pr₀.₁O₂–δ–60 wt % NdₓSr₁₋ₓFe₀.₉Cu₀.₁O₃−δdual-phase membranes were prepared in a one-pot process. These Nd-containing dual-phase membranes have up to 60% lower material costs than many classically used dual-phase materials. The Ce₀.₉Pr₀.₁O₂−δ–Nd₀.₅Sr₀.₅Fe₀.₉Cu₀.₁O₃−δ sample demonstrates outstanding activity and a regenerative ability in the presence of different atmospheres, especially in a reducing atmosphere and pure CO₂ atmosphere in comparison with all investigated samples. The oxygen permeation fluxes across a Ce₀.₉Pr₀.₁O₂−δ–Nd₀.₅Sr₀.₅Fe₀.₉Cu₀.₁O₃−δ membrane reached up to 1.02 mL min⁻¹ cm⁻² and 0.63 mL min⁻¹ cm⁻² under an air/He and air/CO₂ gradient at T = 1223 K, respectively. In addition, a Ce₀.₉Pr₀.₁O₂–δ–Nd₀.₅Sr₀.₅Fe₀.₉Cu₀.₁O₃–δ membrane (0.65 mm thickness) shows excellent long-term self-healing stability for 125 h. The repeated membrane fabrication delivered oxygen permeation fluxes had a deviation of less than 5%. These results indicate that this highly renewable dual-phase membrane is a potential candidate for long lifetime, high temperature gas separation applications and coupled reaction–separation processes.
Surge motion of an ice floe in waves: comparison of theoretical and experimental models
Creators: name: Meylan, Michael
name: Yiew, Lucas
name: Bennetts, Luke
name: French, Benjamin
name: Thomas, Giles
Publisher: name: arXiv
Year: 2014
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: A theoretical model and an experimental model of surge motions of an ice floe due to regular waves are presented. The theoretical model is a modified version of Morrison's equation, valid for small floating bodies. The experimental model is implemented in a wave basin at scale 1:100, using a thin plastic disk to model the floe. The processed experimental data displays a regime change in surge amplitude when the incident wavelength is approximately twice the floe diameter. It is shown that the theoretical model is accurate in the large wavelength regime, but highly inaccurate for the small wavelength regime.
description: 11 pages, 10 figures
Thermal string probes in AdS and finite temperature Wilson loops
Creators: name: Grignani, Gianluca
name: Harmark, Troels
name: Marini, Andrea
name: Obers, Niels A.
name: Orselli, Marta
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We apply a new description of thermal fundamental string probes to the study of finite temperature Wilson loops in the context of the AdS/CFT correspondence. Previously this problem has been considered using extremal probes even though the background is at finite temperature. The new description of fundamental string probes is based on the blackfold approach. As a result of our analysis we find a new term in the potential between static quarks in the symmetric representation which for sufficiently small temperatures is the leading correction to the Coulomb force potential. We also find an order 1/N correction to the onset of the Debye screening of the quarks. These effects arise from including the thermal excitations of the string probe and demanding the probe to be in thermodynamic equilibrium with the Anti-de Sitter black hole background.
description: 17 pages, 5 figures
Curve configurations in the projective plane and their characteristic numbers
Creators: name: Czapliński, Adam
name: Pokora, Piotr
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 14C20, 52C35

description: In this paper we study the concept of characteristic numbers and Chern slopes in the context of curve configurations in the real and complex projective plane. We show that some extremal line configurations inherit the same asymptotic invariants, namely asymptotic Chern slopes and asymptotic Harbourne constants which sheds some light on relations between the bounded negativity conjecture and the geography problem for surfaces of general type. We discuss some properties of Kummer extensions, especially in the context of ball-quotients. Moreover, we prove that for a certain class of smooth curve configurations in the projective plane their characterstic numbers are bounded by $8/3$.
description: 12 pages