cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Learning complexity to guide light-induced self-organized nanopatterns
Creators: name: Brandao, Eduardo
name: Nakhoul, Anthony
name: Duffner, Stefan
name: Emonet, Rémi
name: Garrelie, Florence
name: Habrard, Amaury
name: Jacquenet, François
name: Pigeon, Florent
name: Sebban, Marc
name: Colombier, Jean-Philippe
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Ultrafast laser irradiation can induce spontaneous self-organization of surfaces into dissipative structures with nanoscale reliefs. These surface patterns emerge from symmetry-breaking dynamical processes that occur in Rayleigh-Bénard-like instabilities. In this study, we demonstrate that the coexistence and competition between surface patterns of different symmetries in two dimensions can be numerically unraveled using the stochastic generalized Swift-Hohenberg model. We originally propose a deep convolutional network to identify and learn the dominant modes that stabilize for a given bifurcation and quadratic model coefficients. The model is scale-invariant and has been calibrated on microscopy measurements using a physics-guided machine learning strategy. Our approach enables the identification of experimental irradiation conditions for a desired self-organization pattern. It can be applied generally to predict structure formation in situations where the underlying physics can be approximately described by a self-organization process and data is sparse and non-time series. Our work paves the way for supervised local manipulation of matter using timely-controlled optical fields in laser manufacturing.
State transformations within entanglement classes containing permutation-symmetric states
Creators: name: Hebenstreit, Martin
name: Spee, Cornelia
name: Li, Nicky Kai Hong
name: Kraus, Barbara
name: de Vicente, Julio I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The study of state transformations under local operations and classical communication (LOCC) plays a crucial role in entanglement theory. While this has been long ago characterized for pure bipartite states, the situation is drastically different for systems of more parties: generic pure qudit states cannot be obtained from nor transformed to any state (i.e., they are isolated), which contains a different amount of entanglement. We consider here the question of LOCC convertibility for permutation-symmetric pure states of an arbitrary number of parties and local dimension, a class of clear interest both for physical and mathematical reasons and for which the aforementioned result does not apply given that it is a zero-measure subset in the state space. While it turns out that generic $n$-qubit symmetric states are also isolated, we consider particular families for which we can determine to be, on the contrary, endowed with a rich local stabilizer, a necessary requirement for LOCC convertibility to be possible. This allows us to identify classes in which LOCC transformations among permutation-symmetric states are possible. Notwithstanding, we provide several results that indicate severe obstructions to LOCC convertibility in general even within these highly symmetrical classes. In the course of the study of LOCC transformations, we also characterize the local symmetries of symmetric states.
description: Minor updates in Lemma 6, the paragraph containing Eq. (63), and Sec. VIII A 2d. Added Appendix K. 38 pages, 1 figure
Mode II brittle fracture assessment using an energy based criterion
Creators: name: Rashidi Moghaddam Morteza
name: Ayatollahi Majid, R.
name: Razavi S.M.J.
name: Filippo, Berto
Publisher: name: Физическая мезомеханика
Year: 2016
Subjects: КРИТЕРИЙ ПЛОТНОСТИ ЭНЕРГИИ ДЕФОРМАЦИИ
РАЗРУШЕНИЕ ТИПА II
СОПРОТИВЛЕНИЕ РАЗРУШЕНИЮ
Т-НАПРЯЖЕНИЯ
ХРУПКОЕ РАЗРУШЕНИЕ
STRAIN ENERGY DENSITY CRITERION
MODE II FRACTURE
FRACTURE TOUGHNESS
T-STRESS
BRITTLE FRACTURE

description: In this paper the minimum strain energy density criterion is modified to predict the values of mode II fracture toughness reported in literature for several brittle and quasi-brittle materials. The experimental results are all related to mode II fracture tests performed on the semi-circular bend specimen. The modified mode II fracture criterion takes into account the effect of T-stress (in addition to the singular terms of stresses/strains) when calculating the strain energy density factor at a very small critical distance from the crack tip. It is shown that the proposed criterion provides significantly better predictions for mode II fracture toughness compared with the classical minimum strain energy density criterion.
Power-like potentials: from the Bohr-Sommerfeld energies to exact ones
Creators: name: del Valle, J. C.
name: Turbiner, Alexander V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: For one-dimensional power-like potentials $|x|^m, m > 0$ the Bohr-Sommerfeld Energies (BSE) extracted explicitly from the Bohr-Sommerfeld quantization condition are compared with the exact energies. It is shown that for the ground state as well as for all positive parity states the BSE are always above the exact ones contrary to the negative parity states where BSE remain above the exact ones for $m>2$ but they are below them for $m < 2$. The ground state BSE as the function of $m$ are of the same order of magnitude as the exact energies for linear $(m=1)$, quartic $(m=4)$ and sextic $(m=6)$ oscillators but relative deviation grows with $m$ reaching the value 4 at $m=\infty$. For physically important cases $m=1,4,6$ for the $100$th excited state BSE coincide with exact ones in 5-6 figures. It is demonstrated that modifying the right-hand-side of the Bohr-Sommerfeld quantization condition by introducing the so-called {\it WKB correction} $γ$ (coming from the sum of higher order WKB terms taken at the exact energies) to the so-called exact WKB condition one can reproduce the exact energies. It is shown that the WKB correction is small, bounded function $|γ| < 1/2$ for all $m \geq 1$, it is slow growing with increase in $m$ for fixed quantum number, while it decays with quantum number growth at fixed $m$. For the first time for quartic and sextic oscillators the WKB correction and energy spectra (and eigenfunctions) are written explicitly in closed analytic form with high relative accuracy $10^{-9 \ -11}$ (and $10^{-6}$).
description: 16 pages, 4 figures, 3 tables; typos corrected, extended version, new formulas added, several new references and footnotes
Exploring the intrabinary shock from the redback millisecond pulsar PSR J2129-0429
Creators: name: Hui, C. Y.
name: Hu, C. P.
name: Park, S. M.
name: Takata, J.
name: Li, K. L.
name: Tam, P. H. T.
name: Lin, L. C. C.
name: Kong, A. K. H.
name: Cheng, K. S.
name: Kim, Chunglee
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have investigated the intrabinary shock emission from the redback millisecond pulsar PSR J2129-0429 with XMM-Newton and Fermi. Orbital modulation in X-ray and UV can be clearly seen. Its X-ray modulation has a double-peak structure with a dip in between. The observed X-rays are non-thermal dominant which can be modeled by a power-law with a photon index of ~1.2. Intrabinary shock can be the origin of the observed X-rays. The UV light curve is resulted from the ellipsoidal modulation of the companion. Modeling the UV light curve prefers a large viewing angle. The heating effect of the UV light curve is found to be negligible which suggests the high energy radiation beam of PSR J2129-0429 does not direct toward its companion. On the other hand, no significant orbital modulation can be found in gamma-ray which suggests the majority of the gamma-rays come from the pulsar.
description: 14 pages, 3 figures, 1 table, accepted for publication in ApJ Letter
MPEC 2024-R317 : 2024 RY15
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RY15

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Elasmus
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1946
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Elasmidae
Elasmus

description: 34. Elasmus species. Dededo., May 19, ex lepidopterous leafminer in Terminalia catappa, Swezey; two specimens.
description: Published as part of Swezey, O. H., 1946, Notes On Some Guam Chalcidoidea, pp. 211-219 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum on page 215, DOI: 10.5281/zenodo.5173516
The FAIR Island Project: Tracking the impact of field station research
Creators: name: Robinson, Erin
name: Chodacki, John
name: Davies, Neil
name: Buys, Matt
name: Nancarrow, Catherine
name: Praetzellis, Maria
name: Garza, Kristian
name: Wimalaratne, Sarala
name: Habermann, Ted
Publisher: name: Zenodo
Year: 2022

description: This talk was presented at the UCNRS Managers' Meeting, October 26-27, 2022 at the Steele/Burnand Anza-Borrego Desert Research Center. This presentation introduced the FAIR Island Project and shared our work to date - first connecting scholarly outputs to a single project and then connecting several projects, people, and organizations to a field station.
Aphytis chrysomphali
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1946
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Aphelinidae
Aphytis
Aphytis chrysomphali

description: 35.Aphytis chrysomphali (Mercet). Aphelinus chrysomphali Mercet, Real. Soc. Espan. Hist. Nat., Bol. 12: 135, 1912. Aphytis chrysomphali (Mercet), Timberlake, Haw. Ent. Soc., Proc. 6: 315, 1926. Merizo, June 11, ex Aspidiotus destructor Signoret on banana leaf, Swezey. Two slide mounts, one retained in U. S. National Museum.
description: Published as part of Swezey, O. H., 1946, Notes On Some Guam Chalcidoidea, pp. 211-219 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum on pages 215-216, DOI: 10.5281/zenodo.5173516
Ultra-Compact accurate wave functions for He-like and Li-like iso-electronic sequences and variational calculus. II. Spin-singlet (excited) and spin-triplet (lowest) states of the Helium sequence
Creators: name: Turbiner, A. V.
name: Vieyra, J. C. Lopez
name: del Valle, J. C.
name: Nader, D. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: As a continuation of Part I \cite{Part-1:2020} (Int. Journal of Quantum Chem. 2021; 121: qua.26586), dedicated to the ground state of He-like and Li-like isoelectronic sequences for nuclear charges $Z \leq 20$, a few ultra-compact wave functions in the form of generalized Hylleraas-Kinoshita functions are constructed, which describe the domain of applicability of the Quantum Mechanics of Coulomb Charges (QMCC) for the energies (4-5 significant digits (s.d.)) of two excited states of He-like ions: the spin-singlet (first) excited state $2^1 S$ and the lowest spin-triplet $1^3 S$ state. For both states it provides absolute accuracy for energy $\sim 10^{-3}$\,a.u., exact values for cusp parameters and also for 6 expectation values the relative accuracy $\sim 10^{-2}$. The Bressanini-Reynolds observation about the special form of the nodal surface of the $2^1 S$ state of Helium is confirmed and extended to He-like ions with $Z > 2$. Critical charges $Z=Z_B$, where ultra-compact trial functions lose their square-integrability, are estimated: $Z_B(1^1 S)\approx Z_B(2^1 S)\sim 0.905$ and $Z_B(1^3 S)\sim 0.902$. For both states the Majorana formula - the energy as a second degree polynomial in $Z$ - provides accurately 4-5 significant digits for $Z \leq 20$.
description: 27 pages, 6 figures, 4 tables: typos fixed, 8 extra references added, the text essentially extended, to be published at Int Journ Quantum Chemistry
Equivalent condition for approximately Cohen-Macaulay complexes
Creators: name: Lasoń, Michał
Publisher: name: arXiv
Year: 2014
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 13C14

description: We give a necessary and sufficient condition for a simplicial complex to be approximately Cohen-Macaulay. Namely it is approximately Cohen-Macaulay if and only if the ideal associated to its Alexander dual is componentwise linear and generated in two consecutive degrees. This completes the result of Herzog and Hibi who proved that a simplicial complex is sequentially Cohen-Macaulay if and only if the ideal associated to its Alexander dual is componentwise linear.
description: final version, 3 pages
Multi-Factors Aware Dual-Attentional Knowledge Tracing
Creators: name: Zhang, Moyu
name: Zhu, Xinning
name: Zhang, Chunhong
name: Ji, Yang
name: Pan, Feng
name: Yin, Changchuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: With the increasing demands of personalized learning, knowledge tracing has become important which traces students' knowledge states based on their historical practices. Factor analysis methods mainly use two kinds of factors which are separately related to students and questions to model students' knowledge states. These methods use the total number of attempts of students to model students' learning progress and hardly highlight the impact of the most recent relevant practices. Besides, current factor analysis methods ignore rich information contained in questions. In this paper, we propose Multi-Factors Aware Dual-Attentional model (MF-DAKT) which enriches question representations and utilizes multiple factors to model students' learning progress based on a dual-attentional mechanism. More specifically, we propose a novel student-related factor which records the most recent attempts on relevant concepts of students to highlight the impact of recent exercises. To enrich questions representations, we use a pre-training method to incorporate two kinds of question information including questions' relation and difficulty level. We also add a regularization term about questions' difficulty level to restrict pre-trained question representations to fine-tuning during the process of predicting students' performance. Moreover, we apply a dual-attentional mechanism to differentiate contributions of factors and factor interactions to final prediction in different practice records. At last, we conduct experiments on several real-world datasets and results show that MF-DAKT can outperform existing knowledge tracing methods. We also conduct several studies to validate the effects of each component of MF-DAKT.
description: Accepted by CIKM 2021, 10 pages, 10 figures, 6 tables
Integrable semi-discretizations of the reduced Ostrovsky equation
Creators: name: Feng, Bao-Feng
name: Maruno, Ken-ichi
name: Ohta, Yasuhiro
Publisher: name: arXiv
Year: 2015
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Based on our previous work to the reduced Ostrovsky equation (J. Phys. A 45 355203), we construct its integrable semi-discretizations. Since the reduced Ostrovsky equation admits two alternative representations, one is its original form, the other is the differentiation form, or the short wave limit of the Degasperis-Procesi equation, two semi- discrete analogues of the reduced Ostrovsky equation are constructed possessing the same N-loop soliton solution. The relationship between these two versions of semi-discretizations is also clarified.
description: J. Phys. A: Mathematical and Theoretical, to be published
Gain-switched laser diode seeded Yb-doped fiber amplifier delivering 11-ps pulses at repetition rates up to 40-MHz
Creators: name: Ryser, Manuel
name: Neff, Martin
name: Pilz, Soenke
name: Burn, Andreas
name: Romano, Valerio
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Here, we demonstrate all-fiber direct amplification of 11 picosecond pulses from a gain-switched laser diode at 1063nm. The diode was driven at a repetition rate of 40MHz and delivered 13$μ$W of fiber-coupled average output power. For the low output pulse energy of 0.33pJ we have designed a multi-stage core pumped preamplifier based on single clad Yb-doped fibers in order to keep the contribution of undesired amplified spontaneous emission as low as possible and to minimize temporal and spectral broadening. After the preamplifier we reduced the 40MHz repetition rate to 1MHz using a fiber coupled pulse-picker. The final amplification was done with a cladding pumped Yb-doped large mode area fiber and a subsequent Yb-doped rod-type fiber. With our setup we achieved amplification of 72dBs to an output pulse energy of 5.7$μ$J, pulse duration of 11ps and peak power of >0.6MW.
description: 6 pages, 5 figures
2022 Sept - CEACAM6 - Extended Data File 2 _literature keywords_Step 3b.xlsx
Creators: name: Chaussabel, Damien
Publisher: name: figshare
Year: 2022
Subjects: Biomarkers

description: A spreadsheet in the MS Excel format listing keywords extracted from titles of articles associated with CEACAM6 corresponding to two different themes: “cell types” and “diseases or states”
Feature Selection and Hyperparameter Fine-tuning in Artificial Neural Networks for Wood Quality Classification
Creators: name: Roder, Mateus
name: Passos, Leandro Aparecido
name: Papa, João Paulo
name: Rossi, André Luis Debiaso
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Quality classification of wood boards is an essential task in the sawmill industry, which is still usually performed by human operators in small to median companies in developing countries. Machine learning algorithms have been successfully employed to investigate the problem, offering a more affordable alternative compared to other solutions. However, such approaches usually present some drawbacks regarding the proper selection of their hyperparameters. Moreover, the models are susceptible to the features extracted from wood board images, which influence the induction of the model and, consequently, its generalization power. Therefore, in this paper, we investigate the problem of simultaneously tuning the hyperparameters of an artificial neural network (ANN) as well as selecting a subset of characteristics that better describes the wood board quality. Experiments were conducted over a private dataset composed of images obtained from a sawmill industry and described using different feature descriptors. The predictive performance of the model was compared against five baseline methods as well as a random search, performing either ANN hyperparameter tuning and feature selection. Experimental results suggest that hyperparameters should be adjusted according to the feature set, or the features should be selected considering the hyperparameter values. In summary, the best predictive performance, i.e., a balanced accuracy of $0.80$, was achieved in two distinct scenarios: (i) performing only feature selection, and (ii) performing both tasks concomitantly. Thus, we suggest that at least one of the two approaches should be considered in the context of industrial applications.
title: The Role of Long-Term Contracting in Business Lending
Creators: name: Tian, Phoebe
Publisher: name: Bank of Canada
publisherIdentifier: https://ror.org/05cc98565
publisherIdentifierScheme: ROR
Year: 2024

description: This paper examines inefficiencies arising from a lack of long-term contracting in small business lending in China. I develop and estimate a dynamic model where firms repeatedly interact with the same lender. All loans are short-term. Collateral can be used to deter a strategic default by a firm, but the lender cannot recover the full value of the collateral in the case of a default. The endogenous contract terms—including interest rates, loan size and collateral—reflect a firm’s probability of default in equilibrium. Learning drives the dynamics of contract terms because a firm’s profitability type is unknown. Long-term contracts improve welfare mainly by mitigating the incentives for a firm to default.
description: Cette étude examine les inefficacités résultant d’un manque de contrats à long terme dans le secteur des prêts aux petites entreprises en Chine. J’élabore et estime un modèle dynamique dans lequel des entreprises font affaire de manière répétée avec le même prêteur. Tous les prêts consentis sont des prêts à court terme. Les garanties peuvent servir à prévenir des défauts de paiement stratégiques des entreprises, mais les prêteurs ne peuvent récupérer la valeur totale des garanties en cas de défaillance. Les modalités endogènes des contrats – taux d’intérêt, montants des prêts et garanties – tiennent compte de la probabilité de défaillance des entreprises en situation d’équilibre. L’apprentissage est au cœur de la dynamique des modalités des contrats, car le type de rentabilité des entreprises n’est pas connu au départ. Les contrats à long terme engendrent des gains de bien-être, essentiellement en réduisant les incitations à faire défaut pour les entreprises emprunteuses.
Effect of pairing fluctuations on the spin resonance in Fe-based superconductors
Creators: name: Hinojosa, Alberto
name: Chubukov, Andrey V.
name: Wolfle, Peter
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The spin resonance observed in the inelastic neutron scattering data on Fe-based superconductors has played a prominent role in the quest for determining the symmetry of the order parameter in these compounds. Most theoretical studies of the resonance employ an RPA-type approach in the particle-hole channel and associate the resonance in the spin susceptibility $χ_S (\mathbf{q}, ω)$ at momentum ${\bf Q} = (π,π)$ with the spin-exciton of an $s^{+-}$ superconductor, pulled below $2Δ$ by residual attraction associated with the sign change of the gap between Fermi points connected by ${\bf Q}$. Here we explore the effect of fluctuations in the particle-particle channel on the spin resonance. Particle-particle and particle-hole channels are coupled in a superconductor and to what extent the spin resonance can be viewed as a particle-hole exciton needs to be addressed. In the case of purely repulsive interactions we find that the particle-particle channel at total momentum ${\bf Q}$ (the $π$channel) contributes little to the resonance. However, if the interband density-density interaction is attractive and the $π-$resonance is possible on its own, along with the spin-exciton, we find a much stronger shift of the resonance frequency from the position of the would-be spin-exciton resonance. We also show that the expected double-peak structure in this situation does not appear because of the strong coupling between particle-hole and particle-particle channels, and $\mathrm{Im} χ_S ({\bf Q}, ω)$ displays only a single peak.
description: 8 pages, 4 figures, submitted to PRB
Model-Independent Quantum Phases Classifier
Creators: name: Mahlow, Felipe
name: Luiz, Fabrício S.
name: Malvezzi, André L.
name: Fanchini, Felipe F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Machine learning has revolutionized many fields of science and technology. Through the $k$-Nearest Neighbors algorithm, we develop a model-independent classifier, where the algorithm can classify phases of a model to which it has never had access. For this, we study three distinct spin-$1$ models with some common phases: the XXZ chains with uniaxial single-ion-type anisotropy, the bound alternating XXZ chains, and the bilinear biquadratic chain. We show that, with high probability, algorithms trained with two of these models can determine common phases with the third. It is the first step toward a universal classifier, where an algorithm is able to detect any phase with no knowledge about the Hamiltonian, only knowing partial information about the quantum state.
2-Arylbenzofurans from the stems and leaves of Artocarpus tonkinensis and their potential antiproliferative activities
Creators: name: Guo, Jia-Ming
name: Li, Lin-Xuan
name: Li, Xin-Yi
name: Wang, Tian-Yu
name: Zhu, En-Ning
name: Wu, An-Jiao
name: Li, Shu-Ri
name: Yang, Hui-
name: Liu, Yan-Ping
name: Fu, Yan-Hui
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biochemistry
subject: Pharmacology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer

description: Phytochemical study on the stems and leaves of Artocarpus tonkinensis led to the isolation of a new 2-arylbenzofuran, artocartone (1), as well as seven known 2-arylbenzofurans (2–8). The chemical structure of 1 was established by means of comprehensive spectroscopic analyses and the known compounds were determined by comparing their MS and NMR data with those reported data in literature. The antiproliferative activities of all isolates 1–8 against five human cancer cell lines: HL-60, SMMC-7721, A-375, MCF-7 and SW480 in vitro were evaluated. As a result, compounds 1– 8 displayed notable antiproliferative activities against various human cancer cell lines with IC50 values in the range of 0.28 ± 0.05–26.89 ± 0.18 μM.
Coherently tracking the covariance matrix of an open quantum system
Creators: name: Miao, Zibo
name: Hush, Michael R.
name: James, Matthew
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Coherent feedback control of quantum systems has demonstrable advantages over measurement-based control, but so far there has been little work done on coherent estimators and more specifically coherent observers. Coherent observers are input the coherent output of a specified quantum plant, and are designed such that some subset of the observer and plant's expectation values converge in the asymptotic limit. We previously developed a class of mean tracking (MT) observers for open harmonic oscillators that only converged in mean position and momentum; Here we develop a class of covariance matrix tracking (CMT) coherent observers that track both the mean and covariance matrix of a quantum plant. We derive necessary and sufficient conditions for the existence of a CMT observer, and find there are more restrictions on a CMT observer than there are on a MT observer. We give examples where we demonstrate how to design a CMT observer and show it can be used to track properties like the entanglement of a plant. As the CMT observer provides more quantum information than a MT observer, we expect it will have greater application in future coherent feedback schemes mediated by coherent observers. Investigation of coherent quantum estimators and observers is important in the ongoing discussion of quantum measurement; As they provide estimation of a system's quantum state without explicit use of the measurement postulate in their derivation.
description: 10 pages 4 figures
Multiband Te $p$ Based Superconductivity of Ta$_4$Pd$_3$Te$_{16}$
Creators: name: Singh, D. J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Ta$_4$Pd$_3$Te$_{16}$ is a recently discovered superconductor that has been suggested to be an unconventional superconductor near magnetism. We report electronic structure calculations showing that in spite of the layered crystal structure the material is an anisotropic three dimensional metal. The Fermi surface contains prominent one and two dimensional features, including nested 1D sheets, a 2D cylindrical section and a 3D sheet. The electronic states that make up the Fermi surface are mostly derived from Te $p$ states, with small Ta $d$ and Pd $d$ contributions. This places the compound far from magnetic instabilities. The results are discussed in terms of multiband superconductivity.
On the formation of Be stars through binary interaction
Creators: name: Shao, Yong
name: Li, Xiang-Dong
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Be stars are rapidly rotating B type stars. The origin of their rapid rotation is not certain, but binary interaction remains to be a possibility. In this work we investigate the formation of Be stars resulting from mass transfer in binaries in the Galaxy. We calculate the binary evolution with both stars evolving simultaneously and consider different possible mass accretion histories for the accretor. From the calculated results we obtain the critical mass ratios $q_{\rm cr}$ that determine the stability of mass transfer. We also numerically calculate the parameter $λ$ in common envelope evolution, and then incorporate both $q_{\rm cr}$ and $λ$ into the population synthesis calculations. We present the predicted numbers and characteristics of Be stars in binary systems with different types of companions, including helium stars, white dwarfs, neutron stars, and black holes. We find that in Be/neutron star binaries the Be stars can have a lower limit of mass $ \sim 8 M_{\odot}$ if they are formed by stable (i.e., without the occurrence of common envelope evolution) and nonconservative mass transfer. We demonstrate that isolated Be stars may originate from both mergers of two main-sequence stars and disrupted Be binaries during the supernova explosions of the primary stars, but mergers seem to play a much more important role. Finally the fraction of Be stars which have involved binary interactions in all B type stars can be as high as $ \sim 13%-30% $, implying that most of Be stars may result from binary interaction.
description: 38 pages, 14 figures, 1 table, accepted for publication in ApJ
Strategic Evolution of Adversaries Against Temporal Platform Diversity Active Cyber Defenses
Creators: name: Winterrose, Michael L.
name: Carter, Kevin M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cryptography and Security (cs.CR)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: Adversarial dynamics are a critical facet within the cyber security domain, in which there exists a co-evolution between attackers and defenders in any given threat scenario. While defenders leverage capabilities to minimize the potential impact of an attack, the adversary is simultaneously developing countermeasures to the observed defenses. In this study, we develop a set of tools to model the adaptive strategy formulation of an intelligent actor against an active cyber defensive system. We encode strategies as binary chromosomes representing finite state machines that evolve according to Holland's genetic algorithm. We study the strategic considerations including overall actor reward balanced against the complexity of the determined strategies. We present a series of simulation results demonstrating the ability to automatically search a large strategy space for optimal resultant fitness against a variety of counter-strategies.
Jacobi's Bound. Jacobi's results translated in K{Ö}nig's, Egerv{á}ry's and Ritt's mathematical languages
Creators: name: Ollivier, François
Publisher: name: arXiv
Year: 2021
Subjects: subject: History and Overview (math.HO)
subject: Symbolic Computation (cs.SC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: I.1.2
subject: 12H05 (primary), 90C27 (secondary)

description: Jacobi's results on the computation of the order and of the normal forms of a differential system are translated in the formalism of differential algebra. In the quasi-regular case, we give complete proofs according to Jacobi's arguments. The main result is {\it Jacobi's bound}, still conjectural in the general case: the order of a differential system $P_{1}, \ldots, P_{n}$ is not greater than the maximum $\cal O$ of the sums $\sum_{i=1}^{n} a_{i,σ(i)}$, for all permutations $σ$ of the indices, where $a_{i,j}:={\rm ord}_{x_{j}}P_{i}$, \emph{viz.}\ the \emph{tropical determinant of the matrix $(a_{i,j})$}. The order is precisely equal to $\cal O$ iff Jacobi's \emph{truncated determinant} does not vanish. Jacobi also gave a polynomial time algorithm to compute $\cal O$, similar to Kuhn's "Hungarian method" and some variants of shortest path algorithms, related to the computation of integers $\ell_{i}$ such that a normal form may be obtained, in the generic case, by differentiating $\ell_{i}$ times equation $P_{i}$. Fundamental results about changes of orderings and the various normal forms a system may have, including differential resolvents, are also provided.
description: 104 pages, 10 figures, index of words and names, index of notations
Proaphelinoides elongatiformis Girault
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1946
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Aphelinidae
Proaphelinoides
Proaphelinoides elongatiformis

description: 36. Proaphelinoides elongatiformis Girault, Descr. Stell. Nov., 4, 1917. Piti, Oct. 27, swept from bamboo leaves infested with Asterolecanium miliaris longum (Green), Swezey. One slide mount, retained in U. S. National Museum.
description: Published as part of Swezey, O. H., 1946, Notes On Some Guam Chalcidoidea, pp. 211-219 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum on page 216, DOI: 10.5281/zenodo.5173516
Suzaku Observations of the old pulsar wind nebula candidate HESS J1356-645
Creators: name: Izawa, Masaharu
name: Dotani, Tadayasu
name: Fujinaga, Takahisa
name: Bamba, Aya
name: Ozaki, Masanobu
name: Hiraga, Junko S
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: A largely extended X-ray emission was discovered around the pulsar PSR J1357-6429 with the Suzaku deep observations. The pulsar, whose characteristic age is 7.3 kyr, is located within the TeV gamma-ray source HESS J1356-645. The extended emission is found to have a 1sigma X-ray size of ~4 arcmin, or ~3 pc at 2.4 kpc, with a small offset from the pulsar. Its X-ray spectrum is well reproduced by a simple power-law model with a photon index of 1.70+0.07-0.06. No significant spatial variation was found for the X-ray photon index as a function of distance from the pulsar. We conclude that the extended emission is associated to the pulsar wind nebula of PSR J1357-6429. This is a new sample of largely extended nebulae around middle-aged pulsars. We discuss the evolution of this PWN according to the relic PWN scenario.
description: 13 pages, 7 figures, PASJ, accepted
Secure Blockchain-Based Supply Chain Management with Verifiable Digital Twins
Creators: name: Botta, Vincenzo
name: Fusco, Laura
name: Mondelli, Attilio
name: Visconti, Ivan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: A major problem in blockchain-based supply chain management is the potential unreliability of digital twins when considering digital representations of physical goods. Indeed, the use of blockchain technology to trace goods is obviously ineffective if there is no strong correspondence between what is physically exchanged and the digital information that appears in blockchain transactions. In this work, we propose a model for strengthening the supply chain management of physical goods by leveraging blockchain technology along with a digital-twin verification feature. Our model can be instantiated in various scenarios and we have in particular considered the popular case of food traceability. In contrast to other models known in the literature that propose their own ad-hoc properties to assess the robustness of their supply chain management systems, in this work we use the formalism of secure computation, where processes are described through generic and natural ideal functionalities.
Availability of Disaster Preparedness and Digitization in Archives Preservation in Public Libraries in Rivers State - Hilda Eno Obi (PhD, CLN).
Creators: name: Obi, Hilda  Eno
Publisher: name: figshare
Year: 2023
Subjects: Library studies
Library and information studies not elsewhere classified
Information systems education
Information retrieval and web search
Information systems development methodologies and practice
Educational administration, management and leadership
Educational technology and computing
Public administration
Public policy
Information systems for sustainable development and the public good
Public sector organisation and management

description: This study ascertained availability of disaster preparedness and digitization in archives preservation in public libraries in Rivers state. Two objectives and its corresponding research questions and hypotheses guided this study. The descriptive survey design was adopted for this study. The target population of this study comprised 514 library staff drawn from Rivers state library board and staff from Jubilee library Port Harcourt. The sample size for this study was 399 library staff comprising of 227 staff from Rivers state library board and 172 library staff from Jubilee library Port Harcourt. The sample size was determined by Taro Yamane sample size determination formula while a two-stage sampling technique of stratified and simple random sampling techniques was used to select the sample size. A self-structured questionnaire titled availability of disaster preparedness and digitization in archives preservation questionnaire was used as the instrument for data collection. Face and content validation was ensured by three experts. The instrument yielded reliability coefficients of 0.79 with the use of Cronbach Alpha reliability method. Meanand Standard Deviation was used in answering research questions while z-test was used for the inferential statistics. The findings revealed that disaster preparedness and digitization in the preservation of archives are supported and available in public libraries in Rivers state, Nigeria. Based on the findings, it can be concluded that there are significant differences in the responses of Rivers state library board staff and Jubilee library Port Harcourt staff on the terms of the availability of the disaster preparedness and digitization in archive preservation in the public libraries. It was therefore recommended that more librarians should be employed by the Rivers state government so as to make the process of archive preservation in the State’s public libraries through disaster preparedness and digitization less rigorous and efficient.
EBONYI STATE BUSINESS ENVIRONMENT, SUSTAINABLE DEVELOPMENT, AND THE IMPLICATIONS FOR AGRI-FOOD (MICRO, SMALL AND MEDIUM ENTERPRISES) VALUE CHAIN ACTORS: STAKEHOLDER PERCEPTION AND EVIDENCE REPORT
Creators: name: Olumba, Chukwudi
name: Okpani, Ndukwe
name: Olumba, Chukwudi
name: Okpani, Ndukwe
Publisher: name: Unknown
Year: 2022
Subjects: subject: Agricultural and Food Policy
subject: Nigeria
subject: Policy
subject: Food
subject: Economics
subject: Agriculture

description: Ebonyi state is predominantly dominated by agricultural-based businesses such as farming, food processing and the sale of farm produce such as rice and yam. The business environment is also characterized by other business ventures such as transportation, sales of conventional goals, and financial services. However, the state business environment faces several challenges such as multiple taxations, epileptic power supply, insecurity, and business insurance
2022 Sept - CEACAM6 - Extended Data File 1 _Step 3b.xlsx
Creators: name: Chaussabel, Damien
Publisher: name: figshare
Year: 2022
Subjects: Biomarkers

description: A spreadsheet in the MS Excel format listing keywords extracted from titles of articles associated with CEACAM6 corresponding to two different themes: “cell types” and “diseases or states”
Software-Defined and Virtualized Future Mobile and Wireless Networks: A Survey
Creators: name: Yang, Mao
name: Li, Yong
name: Jin, Depeng
name: Zeng, Lieguang
name: Wu, Xin
name: Vasilakos, Athanasios V.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: With the proliferation of mobile demands and increasingly multifarious services and applications, mobile Internet has been an irreversible trend. Unfortunately, the current mobile and wireless network (MWN) faces a series of pressing challenges caused by the inherent design. In this paper, we extend two latest and promising innovations of Internet, software-defined networking and network virtualization, to mobile and wireless scenarios. We first describe the challenges and expectations of MWN, and analyze the opportunities provided by the software-defined wireless network (SDWN) and wireless network virtualization (WNV). Then, this paper focuses on SDWN and WNV by presenting the main ideas, advantages, ongoing researches and key technologies, and open issues respectively. Moreover, we interpret that these two technologies highly complement each other, and further investigate efficient joint design between them. This paper confirms that SDWN and WNV may efficiently address the crucial challenges of MWN and significantly benefit the future mobile and wireless network.
description: 12 pages, 3 figures, submitted to "Mobile Networks and Applications" (MONET)
Direct Characteristic-Function Tomography of the Quantum States of Quantum Fields
Creators: name: Tian, Zehua
name: Jing, Jiliang
name: Du, Jiangfeng
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Herein, we propose a novel strategy for implementing a direct readout of the symmetric characteristic function of the quantum states of quantum fields without the involvement of idealized measurements, an aspect that has always been deemed ill-defined in quantum field theory. This proposed scheme relies on the quantum control and measurements of an auxiliary qubit locally coupled to the quantum fields. By mapping the expectation values of both the real and imaginary parts of the field displacement operator to the qubit states, the qubit's readout provides complete information regarding the symmetric characteristic function. We characterize our technique by applying it to the Kubo-Martin-Schwinger (thermal) and squeezed states of a quantum scalar field. In addition, we have discussed general applications of this approach to analogue-gravity systems, such as Bose-Einstein condensates, within the scope of state-of-the-art experimental capabilities. This proposed strategy may serve as an essential in understanding and optimizing the control of quantum fields for relativistic quantum information applications, particularly in exploring the interplay between gravity and quantum, for example, the relation to locality, causality, and information.
description: 9+4 pages, 3 figures
Extracting the bulk viscosity of the quark-gluon plasma
Creators: name: Rose, J. -B.
name: Paquet, J. -F.
name: Denicol, G. S.
name: Luzum, M.
name: Schenke, B.
name: Jeon, S.
name: Gale, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the implications of a nonzero bulk viscosity coefficient on the azimuthal momentum anisotropy of ultracentral relativistic heavy ion collisions at the Large Hadron Collider. We find that, with IP-Glasma initial conditions, a finite bulk viscosity coefficient leads to a better description of the flow harmonics in ultracentral collisions. We then extract optimal values of bulk and shear viscosity coefficients that provide the best agreement with flow harmonic coefficients data in this centrality class.
description: 4 pages, 5 figures, proceedings of the XXIV Quark Matter conference, May 19-24 2014, Darmstadt (Germany)
Aneristus ceroplastae Howard
Creators: name: Swezey, O. H.
Publisher: name: Zenodo
Year: 1946
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Aphelinidae
Aneristus
Aneristus ceroplastae

description: 37. Aneristus ceroplastae Howard, Canad. Ent. 27: 351, 1895. Piti, Aug. 18, one specimen swept from Glochidion, Swezey.
description: Published as part of Swezey, O. H., 1946, Notes On Some Guam Chalcidoidea, pp. 211-219 in Insects of Guam II, Honolulu, Hawaii :Bernice P. Bishop Museum on page 216, DOI: 10.5281/zenodo.5173516
First-principle calculation of $η_c\rightarrow 2γ$ decay width from lattice QCD
Creators: name: Meng, Yu
name: Feng, Xu
name: Liu, Chuan
name: Wang, Teng
name: Zou, Zuoheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We perform a lattice QCD calculation of the $η_c\to2γ$ decay width using a model-independent method that requires no momentum extrapolation of the off-shell form factors. This method also provides a straightforward and simple way to examine the finite-volume effects. The calculation is accomplished using $N_f=2$ twisted mass fermion ensembles. The statistically significant excited-state effects are observed and eliminated using a multi-state fit.The impact of fine-tuning the charm quark mass is also examined and confirmed to be well-controlled. Finally, using three lattice spacings for the continuum extrapolation, we obtain the decay width $Γ_{η_cγγ}=6.67(16)_{\mathrm{stat}}(6)_{\mathrm{syst}}$ keV, which differs significantly from the Particle Data Group's reported value of $Γ_{η_cγγ}=5.4(4)$ keV (2.9~$σ$ tension). We provide insight into the comparison between our findings, previous theoretical predictions, and experimental measurements.
description: 8 pages + 2 page supplemental material, 5 figures,4 tables. Published version by Science Bulletin
Positive-Unlabeled Node Classification with Structure-aware Graph Learning
Creators: name: Yang, Hansi
name: Zhang, Yongqi
name: Yao, Quanming
name: Kwok, James
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Node classification on graphs is an important research problem with many applications. Real-world graph data sets may not be balanced and accurate as assumed by most existing works. A challenging setting is positive-unlabeled (PU) node classification, where labeled nodes are restricted to positive nodes. It has diverse applications, e.g., pandemic prediction or network anomaly detection. Existing works on PU node classification overlook information in the graph structure, which can be critical. In this paper, we propose to better utilize graph structure for PU node classification. We first propose a distance-aware PU loss that uses homophily in graphs to introduce more accurate supervision. We also propose a regularizer to align the model with graph structure. Theoretical analysis shows that minimizing the proposed loss also leads to minimizing the expected loss with both positive and negative labels. Extensive empirical evaluation on diverse graph data sets demonstrates its superior performance over existing state-of-the-art methods.
description: CIKM 2023