cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Electrochemical Polishing of Chemical Vapor Deposited Niobium Thin Films
Creators: name: Sun, Zeming
name: Ge, Mingqi
name: Maniscalco, James T.
name: Arrieta, Victor
name: McNeal, Shawn R.
name: Liepe, Matthias U.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Accelerator Physics (physics.acc-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Combining chemical vapor deposition (CVD) with electrochemical polish (EP) operations is a promising route to producing performance-capable superconducting films for use in the fabrication of cost-effective components for superconducting radiofrequency (SRF) particle accelerators and superconducting quantum computers. The post-deposition EP process enables a critically necessary reduction in surface roughness of niobium thin films to promote optimal superconducting surface conditions. In this work, surface morphology, roughness, and crystal orientation of the CVD-grown and EP-polished niobium films were investigated. The grain growth and polishing mechanisms were analyzed. The CVD films were found to comprise steps, kinks, and pyramidal features, resulting in undesirable large peak-to-valley distances. The electrochemical polish was demonstrated to significantly diminish the height of pyramids and effectively minimize the overall surface roughness. In contrast to buffered chemical polishing (BCP), EP results showed a probable dependence on crystal orientation, suggesting this process was influenced by locally enhanced current density and thickness variations of oxide dielectrics. These understandings identify the EP principles tied to CVD-grown Nb films that allow further refinement of surface profiles for film-based SRF applications
Animal-vocalist blends in rock music reviews : a comprehensive method
Creators: name: Stolar, Slade
Publisher: name: University of British Columbia
Year: 2010

description: The present study describes music criticism of rock vocalists where their vocalizations are compared to those of animals in the form of the animal-vocalist blend. The animal-vocalist blend (using the framework developed by Fauconnier and Turner) is a representative example of the use of linguistic and cognitive resources in order to convey acoustic and affective information. These blends present an excellent case study in the variety and expressiveness that is present in the dense semantic field of the album review. The current project draws additional resources from linguistic motor theory, cognitive science, and affect psychology to offer a comprehensive model of this creative process. Findings reveal the highly motivated nature of the animal-vocalist blend, the underlying mechanisms or rhetorical common grounds on which speakers discuss responses to music, and the meaningfulness of human-animal interaction.
การประเมินผลการเรียนรู้ด้านทักษะพิสัย
Creators: name: ประวีนา เอี่ยมยี่สุ่น
Publisher: name: วารสารวิพิธพัฒนศิลป์ โครงการบัณฑิตศึกษา สถาบันบัณฑิตพัฒนศิลป์
Year: 2021
Subjects: การประเมิน
ทักษะพิสัย

description: วารสารวิพิธพัฒนศิลป์, 1, 2, 18-32
Analysis of tweets in response to Timnit Gebru's Firing
Creators: name: Hilly, Robert
Publisher: name: Zenodo
Year: 2020

description: On December 2nd, co-lead of Google's Ethical AI team, Timnit Gebru, was allegedly fired for not retracting her name from a paper called "On the Dangers of Stochastic Parrots: Can Language Models Be Too Big?", in which Gebru et. al examined biases and limitations in large-scale language models. On December 3rd, in response to the uproar over her firing, head of Google AI, Jeff Dean, shared the email he sent to the Google Research team, stating that Gebru's paper, "[…] didn't meet our bar for publication" and ignored "[…] too much relevant research" on the environmental impacts of language models and strategies designed to mitigate bias in language models. On December 9th, Google CEO, Sundar Pichai, emailed Google employees about Gebru's firing, saying that they will, "[…] begin a review of what happened to identify all the points where we can learn - considering everything from de-escalation strategies to new processes we can put in place". Gebru's ouster from Google has sparked debate across Twitter, ranging from whether black and underrepresented communities have a place in tech companies, whether these communities will be able to design AI systems, and whether Google is willing to grapple with ethical questions about their AI systems. In order to get a better idea of the conversations unfolding on Twitter, this analysis will examine what words are being used, the sentiment of these words/sentiments, and the topics mentioned in these conversations.
LHC Signatures of a Vector-like b'
Creators: name: Gopalakrishna, Shrihari
name: Mandal, Tanumoy
name: Mitra, Subhadip
name: Tibrewala, Rakesh
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Many beyond the standard model extensions predict the existence of heavy vector-like fermions. We study the LHC signatures of one such heavy vector-like fermion, called b', with electromagnetic charge -1/3 like the SM b-quark, but which could generically have different SU(2)_L and U(1)_Y quantum numbers. Our emphasis will be on the phenomenology due to b b' mass-mixing, present after electroweak symmetry breaking. We focus on aspects which distinguish a vector-like b' from a chiral b' and include tree-level decays of the b' into t W, b Z and b h final states. While our analysis is largely model-independent, we take as a motivating example warped-space models in which a vector-like b' appears as the custodial partner of the top-quark.
description: 22 pages, 6 figures, minor changes, reference added, journal version
Electronic reconstruction through the structural and magnetic transitions in detwinned NaFeAs
Creators: name: Yi, M.
name: Lu, D. H.
name: Moore, R. G.
name: Kihou, K.
name: Lee, C. -H.
name: Iyo, A.
name: Eisaki, H.
name: Yoshida, T.
name: Fujimori, A.
name: Shen, Z. -X.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We use angle-resolved photoemission spectroscopy to study twinned and detwinned iron pnictide compound NaFeAs. Distinct signatures of electronic reconstruction are observed to occur at the structural (TS) and magnetic (TSDW) transitions. At TS, C4 rotational symmetry is broken in the form of an anisotropic shift of the orthogonal dxz and dyz bands. The magnitude of this orbital anisotropy rapidly develops to near completion upon approaching TSDW, at which temperature band folding occurs via the antiferromagnetic ordering wave vector. Interestingly, the anisotropic band shift onsetting at TS develops in such a way to enhance the nesting conditions in the C2 symmetric state, hence is intimately correlated with the long range collinear AFM order. Furthermore, the similar behaviors of the electronic reconstruction in NaFeAs and Ba(Fe1-xCox)2As2 suggests that this rapid development of large orbital anisotropy between TS and TSDW is likely a general feature of the electronic nematic phase in the iron pnictides, and the associated orbital fluctuations may play an important role in determining the ground state properties.
DrugLogics: An ensemble model analysis related to drug prediction performance
Creators: name: Zobolas, John
name: Vazquez, Miguel
name: Kuiper, Martin
name: Flobak, Åsmund
Publisher: name: F1000 Research Limited
Year: 2019

description: We have developed a computational pipeline which processes two main inputs: a cancer cell fate decision network and the activity state profile of a particular cell line, derived from gene expression and copy number variations data from the Cancer Cell Line Encyclopedia. Using a logical modeling framework coupled with a genetic algorithm approach, our pipeline trains an ensemble of models to fit to the corresponding steady state activity profile of a specific cancer cell line. Then, based on a given drug panel, a drug response analysis is performed on these trained logical model ensembles and the pairwise drug combination in-silico predictions are compared to the experimentally observed ones.

In this study, we show that even though the ensembles of models are trained to a specific consensus steady state profile and exhibit a match (fitness) of more than 50% to it, they still show a diverse individual stable state pattern landscape which leaves room for uncertainties in our steady state inference and thus allows for a more robust drug response analysis. We also devise strategies to split and compare the cell-specific trained models based on individual performance characteristics (number of true positive predictions) or the prediction of specific drug combination sets. This enables a mechanistic approach to find nodes whose state is decisive for the global behavior of the model, and thus represent potential biomarkers.
Neighbor Contrastive Learning on Learnable Graph Augmentation
Creators: name: Shen, Xiao
name: Sun, Dewang
name: Pan, Shirui
name: Zhou, Xi
name: Yang, Laurence T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Recent years, graph contrastive learning (GCL), which aims to learn representations from unlabeled graphs, has made great progress. However, the existing GCL methods mostly adopt human-designed graph augmentations, which are sensitive to various graph datasets. In addition, the contrastive losses originally developed in computer vision have been directly applied to graph data, where the neighboring nodes are regarded as negatives and consequently pushed far apart from the anchor. However, this is contradictory with the homophily assumption of networks that connected nodes often belong to the same class and should be close to each other. In this work, we propose an end-to-end automatic GCL method, named NCLA to apply neighbor contrastive learning on learnable graph augmentation. Several graph augmented views with adaptive topology are automatically learned by the multi-head graph attention mechanism, which can be compatible with various graph datasets without prior domain knowledge. In addition, a neighbor contrastive loss is devised to allow multiple positives per anchor by taking network topology as the supervised signals. Both augmentations and embeddings are learned end-to-end in the proposed NCLA. Extensive experiments on the benchmark datasets demonstrate that NCLA yields the state-of-the-art node classification performance on self-supervised GCL and even exceeds the supervised ones, when the labels are extremely limited. Our code is released at https://github.com/shenxiaocam/NCLA.
Some quantitative results on Lipschitz inverse and implicit functions theorems
Creators: name: Phien, Phan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Numerical Analysis (math.NA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47J07 (Primary) 15A60, 34D10 (Secondary)

description: Let $ f: \mathbb{R} ^ n \rightarrow \mathbb{R}^n $ be a Lipschitz mapping with generalized Jacobian at $x_0$, denoted by $\partial f(x_0)$, is of maximal rank. F. H. Clarke (1976) proved that $f$ is locally invertible. In this paper, we give some quantitative assessments for Clarke's theorem on the Lipschitz inverse, and prove that the class of such mappings are open. Moreover, we also present a quantitative form for Lipschitz implicit function theorem.
description: 15 pages
Essays on the Impact of the Adoption of IFRS on Accounting Information Content, Liquidity and Institutional Investment in Canadian Stock Markets
Creators: name: Khan, Shahid
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Education--Business
subject: Business Administration
subject: Accounting
subject: Business Administration--Management
subject: Information content
subject: IFRS
subject: Accounting
subject: Liquidity
subject: Institutional investment
subject: Earnings
subject: Announcements

description: In my thesis I examine the trade-offs of implementing International Financial Reporting Standards (IFRS) in Canada. My thesis consists of three papers. In my first paper, I examine whether IFRS adoption resulted in greater information content in earnings announcements for TSX and TSXV firms in Canada. I contrast the senior and junior exchange to evaluate the differential impact of IFRS within a single country as these two stock markets represent different information environments for local investors. I find that information content of earnings announcements, measured by abnormal volatility and abnormal volume during the announcement period, increased for TSX firms following the adoption of IFRS. These results indicate that IFRS earnings announcements increased the value-relevant information provided to investors possibly due to the more forward-looking measurement emphasis under IFRS. I find some evidence that information content of earnings was lower for TSXV firms in the post-IFRS adoption period. I cautiously suggest that this may reflect a greater reliance of TSXV investors on realized earnings information. In my second paper, I examine whether average liquidity for three groups of firms - Canadian, non-US international and U.S. firms - traded on Canadian stock exchanges increased or decreased after mandatory adoption of IFRS in Canada. I consider two competing forces affecting liquidity from IFRS adoption: enhanced comparability of firms within industries that span international boundaries and less tailoring of financial reporting to satisfy local investor needs. I find that liquidity decreased for Canadian and U.S. firms, suggesting that the benefits of global comparability were not sufficient to offset the loss of local investor accommodation. However, I find some evidence that liquidity improved for non-U.S. international firms suggesting that enhanced comparability of firms within industries did span international boundaries. In my final paper, I examine whether non-U.S. international institutional investment, measured by percentage ownership by international investors and number of international investors, in Canadian firms increased in the post-IFRS adoption period. I used U.S. firms as my control sample. Results show that Canada did not benefit from higher non-U.S. international institutional investment in the Canadian-listed firms in the post-IFRS period compared to U.S. firms.
Some Considerations About Podolsky-Axionic Electrodynamics
Creators: name: Gaete, Patricio
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For a Podolsky-axionic electrodynamics, we compute the interaction potential within the structure of the gauge-invariant but path-dependent variables formalism. The result is equivalent to that of axionic electrodynamics from a new noncommutative approach, up to first order in $θ$.
description: 11 pages
Electronic properties of gated triangular graphene quantum dots: Magnetism, correlations, and geometrical effects
Creators: name: Potasz, P.
name: Guclu, A. D.
name: Wojs, A.
name: Hawrylak, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a theory of electronic properties of gated triangular graphene quantum dots with zigzag edges as a function of size and carrier density. We focus on electronic correlations, spin and geometrical effects using a combination of atomistic tight-binding, Hartree-Fock and configuration interaction methods (TB+HF+CI) including long range Coulomb interactions. The single particle energy spectrum of triangular dots with zigzag edges exhibits a degenerate shell at the Fermi level with a degeneracy N_{edge} proportional to the edge size. We determine the effect of the electron-electron interactions on the ground state, the total spin and the excitation spectrum as a function of a shell filling and the degeneracy of the shell using TB+HF+CI for N_{edge} < 12 and approximate CI method for N_{edge}\geq 12. For a half-filled neutral shell we find spin polarized ground state for structures up to N=500 atoms in agreement with previous {\it ab initio} and mean-field calculations, and in agreement with Lieb's theorem for a Hubbard model on a bipartite lattice. Adding a single electron leads to the complete spin depolarization for N_{edge}\leq 9. For larger structures, the spin depolarization is shown to occur at different filling factors. Away from half-fillings excess electrons(holes) are shown to form Wigner-like spin polarized triangular molecules corresponding to large gaps in the excitation spectrum. The validity of conclusions is assessed by a comparison of results obtained from different levels of approximations. While for the charge neutral system all methods give qualitatively similar results, away from the charge neutrality an inclusion of all Coulomb scattering terms is necessary to produce results presented here.
description: 13 pages, 13 figures
Respiratory Muscle Function with Agonists
Creators: name: Suneby Jagers, Jenny Vannessa
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Medicine and Surgery
subject: Pharmacology
subject: Respiration
subject: Respiratory Muscle
subject: aminophylline
subject: vilanterol
subject: salmeterol
subject: Sustained Hypoxia
subject: hypercapnia
subject: data analysis
subject: EMG
subject: Sonomicrometry

description: Respiratory muscle agonists of pharmaceutical or chemical nature can be used to alter breathing. Pharmaceutical respiratory agonists can be significant to those suffering from pulmonary diseases such as chronic obstructive pulmonary disease (COPD). In this thesis pharmacological agonists such as aminophylline, salmeterol and vilanterol trifenatate/fluticasone furoate have been shown to work to improve respiration through improved respiratory muscle action. Measurements are made directly from the muscle, ushering in a new era of more direct and useable measurement techniques. Chemical agonists such as hypercapnia (high CO2) and hypoxia (low oxygen) can elicit changes in respiration and are used to elucidate and isolate the action of the pharmaceutical agonists. Respiratory measurements, like those taken in spirometery or pulmonary function tests, can tell us much about the condition of our respiratory system. It has long been assumed that functional residual capacity (FRC) is an “at rest” position for the respiratory system. A case study, included in this thesis, sheds light on this variable and challenges our views on “rest” within the respiratory system. The respiratory muscles may contain a basal level of tone, or foreshortening, shown after flaccid paralysis using sonomicrometry. Physiological data, both in its collection and analysis, requires skill and great care as to avoid bias and to maintain integrity and honesty in its reporting. The analysis process from beginning to end is a cornerstone of this research and mastery of its use is demonstrated throughout this thesis.
Enumeration and asymptotics of restricted compositions having the same number of parts
Creators: name: Banderier, Cyril
name: Hitczenko, Pawel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We study pairs and m--tuples of compositions of a positive integer n with parts restricted to a subset P of positive integers. We obtain some exact enumeration results for the number of tuples of such compositions having the same number of parts. Under the uniform probability model, we obtain the asymptotics for the probability that two or, more generally, m randomly and independently chosen compositions of n have the same number of parts. For a large class of compositions, we show how a nice interplay between complex analysis and probability theory allows to get full asymptotics for this probability. Our results extend an earlier work of Bóna and Knopfmacher. While we restrict our attention to compositions, our approach is also of interest for tuples of other combinatorial structures having the same number of parts.
description: Discrete Applied Mathematics (2012) 1-13
An exactly solvable coarse-grained model for species diversity
Creators: name: Suweis, Samir
name: Rinaldo, Andrea
name: Maritan, Amos
Publisher: name: arXiv
Year: 2012
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: We present novel analytical results about ecosystem species diversity that stem from a proposed coarse grained neutral model based on birth-death processes. The relevance of the problem lies in the urgency for understanding and synthesizing both theoretical results of ecological neutral theory and empirical evidence on species diversity preservation. Neutral model of biodiversity deals with ecosystems in the same trophic level where per-capita vital rates are assumed to be species-independent. Close-form analytical solutions for neutral theory are obtained within a coarse-grained model, where the only input is the species persistence time distribution. Our results pertain: the probability distribution function of the number of species in the ecosystem both in transient and stationary states; the n-points connected time correlation function; and the survival probability, definned as the distribution of time-spans to local extinction for a species randomly sampled from the community. Analytical predictions are also tested on empirical data from a estuarine fish ecosystem. We find that emerging properties of the ecosystem are very robust and do not depend on specific details of the model, with implications on biodiversity and conservation biology.
description: 20 pages, 4 figures. To appear in Journal of Statistichal Mechanics
Machine Learning for Designing Fast Quantum Gates
Creators: name: Zahedinejad, Ehsan
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Physics--Theory
subject: Machine Learning
subject: Quantum Gates
subject: Quantum Control
subject: Differential Evolution

description: Fault-tolerant quantum computing requires encoding the quantum information into logical qubits and performing the quantum information processing in a code-space. Quantum error correction codes, then, can be employed to diagnose and remove the possible errors in the quantum information, thereby avoiding the loss of information. Although a series of single- and two-qubit gates can be employed to construct a quantum error correcting circuit, however this decomposition approach is not practically desirable because it leads to circuits with long operation times. An alternative approach to designing a fast quantum circuit is to design quantum gates that act on a multi-qubit gate. Here I devise quantum control schemes to design high-fidelity single-shot multi-qubit (up to three) quantum gates. Quantum control task is to steer quantum dynamics towards closely realizing specific quantum operation by varying the external control parameters (external field) such that the resultant evolution closely approximates the desired evolution. A set of instructions that determines the control parameters, and hence the effectiveness of the control scheme, is called a policy. Machine learning algorithms can be employed to find successful policies for designing quantum gates. In particular, we employ supervised machine learning techniques to generate these successful policies. Finding successful policies is a feasibility problem for which optimization algorithms can be employed. Greedy algorithms are at the heart of machine learning techniques. They converge faster onto a successful policy and require less-computational resource than non-greedy algorithms. However, there is no guarantee that greedy algorithms succeed to a feasible solution when there exist constraints on i) gate operation time ii) computational resources, and iii) experimental resources. Our results show the failure of standard greedy machine learning algorithms and the superiority of non-greedy machine learning algorithms over greedy ones for designing quantum logic gates, when there exist constraints on the quantum system. We have also observed the failure of existing greedy and non-greedy techniques for designing high-fidelity three-qubit gates. Hence, we devised our machine learning technique called Subspace-Selective Self-adaptive Differential Evolution (SuSSADE). Each three-qubit gate designed by SuSSADE operates as fast as an entangling two-qubit gate under the same experimental constraints.
Multitime Quantum Communication: Interesting But Not Counterfactual
Creators: name: Griffiths, Robert B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A protocol for transmission of information between two parties introduced by Salih et al., Phys. Rev. Lett. 110 (2013) 170502 (hereafter SLAZ), involves sending quantum amplitude back and forth through a quantum channel in a series of steps, rather than simply sending a signal in one direction. The authors claimed that their protocol was ``counterfactual'' in the sense that while a quantum channel is needed to connect the parties, its actual usage becomes vanishingly small in the asymptotic limit as the number of steps tends to infinity. Here we show that this claim is incorrect because it uses probabilistic reasoning that is not valid at intermediate times in the presence of quantum interference. When ill-defined probabilities are replaced with a well-defined measure of channel usage here called ``Cost'', equal to the absolute square of the amplitude sent through the channel, the total Cost does not go to zero in the asymptotic limit of a large number of steps, but is bounded below by a rigorous inequality. A detailed analysis shows that this bound is satisfied in the SLAZ protocol. The analysis leading to the bound uses the fact that the Gram matrix formed by inner products of a collection of pure quantum states is additive over Hilbert subspaces and invariant under unitary time transformations. Its off-diagonal elements, which in general are not positive, play a significant role in the formal argument as well as providing a somewhat strange way of visualizing the transfer of information.
description: Ver. 3: 19 pages. Error corrected in Ref. [9]. Minor changes (abstract, etc.) to make it resemble the published version
Z' signals in polarised top-antitop final states
Creators: name: Basso, L.
name: Mimasu, K.
name: Moretti, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the sensitivity of top-antitop samples produced at all energy stages of the Large Hadron Collider (LHC) to the nature of an underlying Z' boson, in presence of full tree level standard model (SM) background effects and relative interferences. We concentrate on differential mass spectra as well as both spatial and spin asymmetries thereby demonstrating that exploiting combinations of these observables will enable one to distinguish between sequential Z's and those pertaining to Left-Right symmetric models as well as E6 inspired ones, assuming realistic final state reconstruction efficiencies and error estimates.
description: 21 pages, 6 colour figures, 10 tables
A Semantic Relatedness Measure Based on Combined Encyclopedic, Ontological and Collocational Knowledge
Creators: name: Haralambous, Yannis
name: Klyuev, Vitaly
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: I.2.7
subject: 68T50

description: We describe a new semantic relatedness measure combining the Wikipedia-based Explicit Semantic Analysis measure, the WordNet path measure and the mixed collocation index. Our measure achieves the currently highest results on the WS-353 test: a Spearman rho coefficient of 0.79 (vs. 0.75 in (Gabrilovich and Markovitch, 2007)) when applying the measure directly, and a value of 0.87 (vs. 0.78 in (Agirre et al., 2009)) when using the prediction of a polynomial SVM classifier trained on our measure. In the appendix we discuss the adaptation of ESA to 2011 Wikipedia data, as well as various unsuccessful attempts to enhance ESA by filtering at word, sentence, and section level.
description: 6 pages, 6 figures, accepted for publication at IJCNLP2011 Conference
Direct electrical probing of anomalous Nernst conductivity
Creators: name: Zhou, Weinan
name: Miura, Asuka
name: Sakuraba, Yuya
name: Uchida, Ken-ichi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Despite the usefulness of the anomalous Nernst conductivity ($α^{A}_{xy}$) for studying electronic band structures and exploring magnetic materials with large transverse thermopower, there has not been a straightforward way to obtain $α^{A}_{xy}$ in the experiment. Here, we propose a simple and versatile method enabling direct electrical probing of $α^{A}_{xy}$, which is realized by creating a closed circuit consisting of a target magnetic material and a non-magnetic conductor. This method was experimentally demonstrated on a thin film of magnetic Weyl semimetal Co$_{2}$MnGa, where the closed circuit was formed simply by connecting both ends of the Co$_{2}$MnGa film with a Au wire. A good approximation of $α^{A}_{xy}$ was obtained in a wide temperature range, validating the proposed method and exhibiting its potential for aiding the further development of topological materials science and transverse thermoelectrics.
description: 7 pages, 5 figures
Applications of Atomic Ensembles for Photonic Quantum Information Processing and Fundamental Tests of Quantum Physics
Creators: name: Khazali, Mohammadsadegh
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Physics--Atomic
subject: Optics
subject: Physics--Theory
subject: Rydberg Atoms
subject: Cold Atoms
subject: Many-body Entanglement
subject: Quantum Information
subject: Quantum computation
subject: Schrödinger Cat State
subject: Quantum Memory
subject: Photonic Gate
subject: Two Level Polariton Model
subject: Energy Decoherence
subject: Collapse Models

description: Quantum optics provides tools for the accurate control of light using atoms and also for manipulating atomic states using light. These techniques are being used for many applications, including quantum information processing and the generation of exotic quantum states. This thesis contains proposals for implementing a photonic quantum memory and a photon-photon gate, which are essential elements of photonic quantum information processing. Furthermore it proposes a scheme for the creation of many-body entangled states. First a proposal for a new quantum memory protocol, called the atomic frequency sweep quantum memory, is presented. A two-level polariton model is derived that explains the coherent storage and retrieval of light through the manipulation of the atomic resonance frequency. This is followed by a scheme for a deterministic photonic controlled-PHASE gate based on the strong interaction between two stationary collective Rydberg excitations in an atomic ensemble. Distortion effects caused by nonuniform interaction are quantified and compensation techniques for these effects are proposed. Finally a proposal is presented that uses Rydberg dressing for the generation of energy cat states in an atomic medium, i.e. superposition states of all the atoms being in the ground or excited state, where these two states are connected by an optical transition and thus have a significant difference in energy. Considering the fragility of the state, the effects of many different imperfections and decoherence sources are quantified. The resulting cat state would allow testing of energy decoherence models with greatly improved sensitivity.
Forced Nonlinear Schroedinger Equation with Arbitrary Nonlinearity
Creators: name: Cooper, Fred
name: Khare, Avinash
name: Quintero, Niurka R.
name: Mertens, Franz G.
name: Saxena, Avadh
Publisher: name: arXiv
Year: 2011
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We consider the nonlinear Schr{ö}dinger equation (NLSE) in 1+1 dimension with scalar-scalar self interaction $\frac{g^2}{κ+1} (ψ^\star ψ)^{κ+1}$ in the presence of the external forcing terms of the form $r e^{-i(kx + θ)} -δψ$. We find new exact solutions for this problem and show that the solitary wave momentum is conserved in a moving frame where $v_k=2 k$. These new exact solutions reduce to the constant phase solutions of the unforced problem when $r \rightarrow 0.$ In particular we study the behavior of solitary wave solutions in the presence of these external forces in a variational approximation which allows the position, momentum, width and phase of these waves to vary in time. We show that the stationary solutions of the variational equations include a solution close to the exact one and we study small oscillations around all the stationary solutions. We postulate that the dynamical condition for instability is that $ dp(t)/d \dot{q} (t) < 0$, where $p(t)$ is the normalized canonical momentum $p(t) = \frac{1}{M(t)} \frac {\partial L}{\partial {\dot q}}$, and $\dot{q}(t)$ is the solitary wave velocity. Here $M(t) = \int dx ψ^\star(x,t) ψ(x,t)$. Stability is also studied using a "phase portrait" of the soliton, where its dynamics is represented by two-dimensional projections of its trajectory in the four-dimensional space of collective coordinates. The criterion for stability of a soliton is that its trajectory is a closed single curve with a positive sense of rotation around a fixed point. We investigate the accuracy of our variational approximation and these criteria using numerical simulations of the NLSE.
description: 37 pages, 20 figures
Jet substructure probe to unfold singlet-doublet dark matter in the presence of non-standard cosmology
Creators: name: Das, Prasanta Kumar
name: Konar, Partha
name: Kundu, Saumyen
name: Show, Sudipta
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the singlet-doublet fermionic dark matter model, where the non-thermal production of the dark matter in light of a non-standard cosmology demands a significantly large interaction rate than the typical radiation-dominated Universe. Despite being a model of freeze-in light dark matter and heavy mediator, the characteristic long-lived particle searches at the collider experiment and the displaced vertex signature do not help in probing such a dark sector since this non-standard interaction mandates nearly prompt decay. We make a counterproposal to probe such signal with di-fat-jets generated from the boosted decays of massive vector bosons and Standard Model Higgs, along with the substantial missing transverse momentum to probe the dark matter at LHC. Interestingly, substructure variables associated with these fat jets have an additional handle to tackle the extensive QCD background as it encodes implicit footmarks of their origin. We adopt the multivariate analysis with the booted decision tree to constrain the measured relic density allowed parameter space of dark matter in the presence of the modified cosmological scenario. Our study shows how the non-trivial expansion affects dark matter production in the early Universe and alters the required search strategies at colliders. This probe provides the best discovery prospect at the HL-LHC for extended parameter space now opened up in the dark sector.
description: 23 pages, 8 figures, 4 tables, journal version
Thermal evolution and sintering of chondritic planetesimals
Creators: name: Henke, Stephan
name: Gail, Hans-Peter
name: Trieloff, Mario
name: Schwarz, Winfried H.
name: Kleine, Thorsten
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The major aim of this study is to assess the effects of sintering of initially porous material on the thermal evolution of planetesimals, and to constrain the values of basic parameters that determined the structure and evolution of the H chondrite parent body. A new code is presented for modeling the thermal evolution of ordinary chondrite parent bodies that initially are highly porous and undergo sintering by hot pressing as they are heated by decay of radioactive nuclei. The pressure and temperature stratification in the interior of the bodies is calculated by solving the equations of hydrostatic equilibrium and energy transport. The decrease of porosity of the granular material by hot pressing due to self-gravity is followed by solving a set of equations for the sintering of powder materials. For the heat conductivity of granular material we combine recently measured data for highly porous powder materials, relevant for the surface layers of planetesimals, with data for heat conductivity of chondrite material, relevant for the strongly sintered material in deeper layers. To demonstrate the capability of our new model, the thermal evolution of the H chondrite parent body was reconstructed. The model starts with a porous body that is later compacted first by 'cold pressing' at low temperatures and then by 'hot pressing' for temperatures above \approx 700 K, i.e., the threshold temperature for sintering of silicates. The thermal model was fitted to the well constrained cooling histories of the two H chondrites Kernouve (H6) and Richardton (H5).
description: 19 pages 12 figures submitted to A&A
Myotis albescens
Creators: name: Carrion-Bonilla, Carlos Alberto
name: Cook, Joseph Anthony
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Myotis
Myotis albescens

description: Myotis albescens.
 ARGENTINA (n = 1): Tucumán, Trancas, km 42 on Hwy 364, S San Pedro de Colalao (SNOMNH 23790). PERU (n = 7): Uyacali, Balta, Río Curanja (MSB 28518 -24).
description: Published as part of Carrion-Bonilla, Carlos Alberto & Cook, Joseph Anthony, 2020, A new bat species of the genus Myotis with comments on the phylogenetic placement of M. keaysi and M. pilosatibialis, pp. 508-532 in Therya 11 (3) on page 524, DOI: 10.12933/therya-20-999, http://zenodo.org/record/10260821
Environmental Stress Corrosion Cracking Resistance of High Density Polyethylene Pipes in Alkali Surfactant Polymer Floods
Creators: name: Dooley, Colin
Publisher: name: Graduate Studies
Year: 2012
Subjects: Engineering--Industrial
Engineering--Petroleum

description: Enhanced oil recovery (EOR) techniques such as alkali surfactant polymer (ASP) flooding will be required to meet future energy requirements. Large pipeline networks are required for the transportation of ASP fluids. To ensure the safe and reliable operation of these pipelines, high density polyethylene (HDPE) materials are frequently used due to its corrosion resistance from oil-field fluids. Surfactant chemicals and other wetting agents are known to cause environmental stress corrosion cracking (SCC) of polyethylene plastics. This thesis studies the resistance of HDPE pipeline materials to environmental stress corrosion cracking due to the exposure to ASP chemicals. This research taken an industrial focus, as a result, test methods were selected that closely represented actual pipeline conditions. Full scale HDPE pipe samples were pressurized with a solution of alkali and surfactant chemicals commonly used for ASP floods. Following conditioning, test specimens were prepared from the pipe samples and subjected to tensile testing to investigate for evidence of stress corrosion cracking. The results showed that conditioned specimens had no significant degradation of the mechanical properties compared to unconditioned samples. Based on the test results, it is concluded that there is no evidence of environmental SCC of the HDPE pipe materials due to pressurized exposure to ASP fluids. Additional testing utilizing more severe accelerated test methods are recommended to confirm the long-term resistance of HDPE materials in ASP floods. Nevertheless, this work supports the empirical industry experience that current HDPE pipeline materials are resistance to ASP chemicals. These research results can be incorporated into current pipeline design and operating procedures to ensure the safe and reliable operation of ASP systems.
Quantum linear amplifier enhanced by photon subtraction and addition
Creators: name: Kim, Ho-Joon
name: Lee, Su-Yong
name: Ji, Se-Wan
name: Nha, Hyunchul
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A deterministic quantum amplifier inevitably adds noise to an amplified signal due to the uncertainty principle in quantum physics. We here investigate how a quantum-noise-limited amplifier can be improved by additionally employing the photon subtraction, the photon addition, and a coherent superposition of the two, thereby making a probabilistic, heralded, quantum amplifier. We show that these operations can enhance the performance in amplifying a coherent state in terms of intensity gain, fidelity, and phase uncertainty. In particular, the photon subtraction turns out to be optimal for the fidelity and the phase concentration among these elementary operations, while the photon addition also provides a significant reduction in the phase uncertainty with the largest gain effect.
description: published version, 7 pages, 9 figures
Online Hyperparameter Optimization for Class-Incremental Learning
Creators: name: Liu, Yaoyao
name: Li, Yingying
name: Schiele, Bernt
name: Sun, Qianru
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Class-incremental learning (CIL) aims to train a classification model while the number of classes increases phase-by-phase. An inherent challenge of CIL is the stability-plasticity tradeoff, i.e., CIL models should keep stable to retain old knowledge and keep plastic to absorb new knowledge. However, none of the existing CIL models can achieve the optimal tradeoff in different data-receiving settings--where typically the training-from-half (TFH) setting needs more stability, but the training-from-scratch (TFS) needs more plasticity. To this end, we design an online learning method that can adaptively optimize the tradeoff without knowing the setting as a priori. Specifically, we first introduce the key hyperparameters that influence the trade-off, e.g., knowledge distillation (KD) loss weights, learning rates, and classifier types. Then, we formulate the hyperparameter optimization process as an online Markov Decision Process (MDP) problem and propose a specific algorithm to solve it. We apply local estimated rewards and a classic bandit algorithm Exp3 to address the issues when applying online MDP methods to the CIL protocol. Our method consistently improves top-performing CIL methods in both TFH and TFS settings, e.g., boosting the average accuracy of TFH and TFS by 2.2 percentage points on ImageNet-Full, compared to the state-of-the-art.
description: AAAI 2023 Oral. Code is available at https://class-il.mpi-inf.mpg.de/online/code/
Duponchelia fovealis Zeller 1847
Creators: name: Wieser, Christian
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Crambidae
Duponchelia
Duponchelia fovealis

description: Duponchelia fovealis Zeller, 1847
Die ursprünglich subtropische/tropische Art findet sich in Mitteleuropa primär in Gewächshäusern und wurde rezent erstmals in Österreich gefunden (Rohrbach i.M. 27.11.2004, leg. Pröll, coll. und det. Wimmer), möglicherweise basierend auf einer sporadischen Migration (HUEMER 2013). Nunmehr sind in diesem Jahr auch zwei Funde aus Kärnten bekannt geworden. Der erste am 8.9.2018 in einem Bruchwaldbereich der Tiebelmündung (leg. Wieser), also weitab aller Gewächshäuser und der zweite in Klagenfurt; Jahrmarktgasse 10, 28.9.2018; leg. B. Brudermann. Besonders der erste Fund würde eher auf eine Migration aus dem Süden hinweisen. Die Art ist in südlichen Ländern häufig und zuweilen wird sie durch Raupenfrass an Kulturen in Gärtnereien schädlich.
description: Published as part of Wieser, Christian, 2017, Weitere Erstfunde und bemerkenswerte Schmetterlingsnachweise aus Kärnten (Insecta: Lepidoptera), pp. 285-291 in Rudolfinum – Jahrbuch des Landesmuseums für Kärnten 2017 on page 290, DOI: 10.5281/zenodo.5725317
The many reasons that the rotation curves of low-mass galaxies can fail as tracers of their matter distributions
Creators: name: Downing, Eleanor R.
name: Oman, Kyle A.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: It is routinely assumed that galaxy rotation curves are equal to their circular velocity curves (modulo some corrections) such that they are good dynamical mass tracers. We take a visualisation-driven approach to exploring the limits of the validity of this assumption for a sample of $33$ low-mass galaxies ($60
description: MNRAS accepted. Fig. 2 is a video that will play on compatible software (e.g. Okular and Adobe Acrobat, but not Preview or browser viewers). The document may need to be 'trusted' before the video plays. The same video is also available as an ancillary file. The complete collection of supplementary materials are available from the publisher at https://doi.org/10.1093/mnras/stad868