cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Inflation from Superstring/M-Theory Compactification with Higher Order Corrections II -- Case of Quartic Weyl Terms --
Creators: name: Akune, Kenta
name: Maeda, Kei-ichi
name: Ohta, Nobuyoshi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a detailed study of inflationary solutions in M-theory with higher order quantum corrections. We first exhaust all exact and asymptotic solutions of exponential and power-law expansions in this theory with quartic curvature corrections, and then perform a linear perturbation analysis around fixed points for the exact solutions in order to see which solutions are more generic and give interesting cosmological models. We find an interesting solution in which the external space expands exponentially and the internal space is static both in the original and Einstein frames. This may be regarded as moduli stabilization by higher order corrections. Furthermore, we perform a numerical calculation around this solution and find numerical solutions which give enough e-foldings. We also briefly summarize similar solutions in type II superstrings.
description: 40 pages, 11 figures, v2: additional explanations, refs. added, to appear in PRD
Cycle Flux Ranking of Network Analysis in Quantum Thermal Device
Creators: name: Wang, Luqin
name: Wang, Zi
name: Wang, Chen
name: Ren, Jie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Manipulating quantum thermal transport relies on uncovering the principle working cycles of quantum devices. Here, we apply the cycle flux ranking of network analysis to nonequilibrium thermal devices described by graphs of quantum state transitions. To excavate the principal mechanism out of complex transport behaviors, we decompose the quantum-transition network into cycles, calculate the cycle flux by algebraic graph theory, and pick out the dominant cycles with top-ranked fluxes, i.e., the cycle trajectories with highest probabilities. We demonstrate the cycle flux ranking in typical quantum device models, such as a thermal-drag spin-Seebeck pump, and a quantum thermal transistor as thermal switch or heat amplifier. The dominant cycle trajectories indeed elucidate the principal working mechanisms of those quantum devices. The cycle flux analysis provides an alternative perspective that naturally describes the working cycle corresponding to the main functionality of quantum thermal devices, which would further guide the device optimization with desired performance
description: 6 pages,4 figures
Prospects for study of the effect of the electronic screening on the $α$ decay in the storage rings
Creators: name: Karpeshin, F. F.
name: Trzhaskovskaya, M. B.
name: Vitushkin, L. F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Study of the role of the electron screening in the $α$ decay is advanced, aimed at the experimental test in the storage rings. To this end, systematic calculation of the effect in heavy ions of the nuclei within the Ra to Po domain of the $α$ emitters is conducted within the adiabatic approach. The obtained effect is to slow down the decay by an amount within the percent value. It is of the opposite sign comparing to what is predicted within the conventional frozen shell model. The reason for this divergence is demonstrated. Testing this difference experimentally in storage ring facilities is proposed. It is of great interest for advancing the astrophysical fundamental research.
description: Paper was discussed at the 17th SPARC Topical Workshop SPARC2020 workshop and seminar in the Atomic Physics Department at GSI
Deformation and fracture behavior of eutectic aluminum-silicon casting alloys
Creators: name: Dowdle, Eric James
Publisher: name: University of British Columbia
Year: 2009

description: The effect of silicon particle size and morphology on the deformation and fracture behavior of a binary aluminum silicon casting alloy was studied. Castings of eutectic composition were solidified either slowly without modifiers, or quickly with strontium modification to produce two different as-cast microstructures. Solution treatment of the castings was performed for various lengths of time at 540°C to further differentiate the structures. Quantitative image analysis was used to describe the size and shape of the silicon particles. Samples were tested in both tension and compression. Particle sizes were in a region where, neither continuum plasticity nor dislocation based models can fully predict the effect of the silicon phase on the deformation behavior of the alloy. The deformation and fracture behavior were dependent on the size and shape of the silicon particles. Damage, in the form of particle cracking, degraded the strength of the alloy and reduced ductility. This was compared to a simple analytical model which describes the effect of damage on flow in a composite material.
Parton Distributions - DIS06
Creators: name: Thorne, R. S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I discuss the current status of parton distributions. I outline the wide variety of different parton distributions available, and highlight which are either necessary or suitable for use at present.
description: 8 pages, 7 figures included as .ps or .eps files. Plenary talk DIS2006 meeting, April 19-24, Tsukuba, Japan
Validation of a Deep Learning-Based Automated Detection Algorithm for Mobile Chest Radiographs of Patients with SARSCoV- 2 Infection in a Field Hospital
Creators: name: Warit Tarathipmon
Publisher: name: Research Administration Division
Year: 2023
Subjects: Chest radiographs
COVID-19 pneumonia
Deep learning-based automatic detection (DLAD) algorithm
SARS-CoV2 infection

description: Science & Technology Asia, 28, 4, 305-313
Photoproduction of $Λ^*$ and $Σ^*$ resonances with $J^P=1/2^-$ off the proton
Creators: name: Kim, Sang-Ho
name: Khemchandani, K. P.
name: Torres, A. Martinez
name: Nam, Seung-il
name: Hosaka, Atsushi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We study the photoproduction of the $Λ(1405)$ and $Σ(1400)$ hyperon resonances, the latter of which is not a well established state. We evaluate the $s$-, $t$- and $u$-channel diagrams in the Born approximation by employing the effective Lagrangians. A new ingredient is the inclusion of a nucleon resonance $N^*(1895)$ that is dynamically generated with predictions for its coupling to the $KΛ(1405)$ and $KΣ(1400)$ channels. To extend the applicability of the model to energies beyond the threshold region, we consider a Regge model for the $t$-channel $K$- and $K^*$-exchanges. Our results are in good agreement with the CLAS data available on $Λ(1405)$, while for $Σ(1400)$ we predict observables for its production. We also provide polarization observables for both hyperon productions, which can be useful in future experimental investigations. The present study provides new information on the nucleon resonance $N^*(1895)$ which can be an alternative source for generating the hyperon resonances $Λ(1405)$ and $Σ(1400)$.
description: 13 pages, 9 figures
Dolichogenidea cauda Song & Chen 2004
Creators: name: Fernandez-Triana, Jose
name: Sakagami, Kota
name: Shimizu, So
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Dolichogenidea
Dolichogenidea cauda

description: D. cauda Song & Chen, 2004: Ovipositor sheath much longer (approximately 1.6 times) than metatibia.
description: Published as part of Fernandez-Triana, Jose, Sakagami, Kota & Shimizu, So, 2018, Dolichogenidea maetoi sp. nov. (Hymenoptera: Braconidae) from Japan, the first parasitoid wasp recorded from Hyblaea fortissima (Lepidoptera), pp. 167-175 in Acta Entomologica Musei Nationalis Pragae 58 (1) on page 171, DOI: 10.2478/aemnp-2018-0014, http://zenodo.org/record/3699178
Jet-gas interactions in z~2.5 radio galaxies: evolution of the ultraviolet line and continuum emission with radio morphology
Creators: name: Humphrey, A.
name: Villar-Martin, M.
name: Fosbury, R.
name: Vernet, J.
name: Alighieri, S. di Serego
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an investigation into the nature of the jet-gas interactions in a sample of 10 radio galaxies at 2.3
description: Accepted for publication in MNRAS
Repulsive force by vector mesons and quark-hadron phase transition
Creators: name: Kouno, Hiroaki
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Using a phenomenological model with vector-type interactions, we discuss a role of repulsive force in the quark-hadron phase transition at high density. For realization of the quark phase at high density, strong vector coupling is needed in the hadron phase, while it is forbidden in the quark phase. For the quark-phase, a NJL-type model with a multi-quark interaction is investigated. We show that, in this model, the restoration of chiral symmetry decreases effective vector coupling and the quark phase is realized at high density, even if we have strong vector coupling at low density. In this model, the strong coupling in the hadron phase is induced by the chiral symmetry breaking.
description: 3 pages, 2 figures, to be published in the proceedings for the YITP workshop YITP-W-06-07 on "Thermal Quantum Field Theories and Their Applications", Kyoto, August 23-25, 2006
Dolichogenidea cerialis
Creators: name: Fernandez-Triana, Jose
name: Sakagami, Kota
name: Shimizu, So
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Dolichogenidea
Dolichogenidea cerialis

description: D. cerialis (Nixon, 1976): Pterostigma brown; propodeum with areola completely defined by carinae, including strong transverse carinae forking around spiracles; T1 very strongly rugulose.
description: Published as part of Fernandez-Triana, Jose, Sakagami, Kota & Shimizu, So, 2018, Dolichogenidea maetoi sp. nov. (Hymenoptera: Braconidae) from Japan, the first parasitoid wasp recorded from Hyblaea fortissima (Lepidoptera), pp. 167-175 in Acta Entomologica Musei Nationalis Pragae 58 (1) on page 171, DOI: 10.2478/aemnp-2018-0014, http://zenodo.org/record/3699178
Bootstrap Bounds on Closed Hyperbolic Manifolds
Creators: name: Bonifacio, James
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The eigenvalues of the Laplace-Beltrami operator and the integrals of products of eigenfunctions must satisfy certain consistency conditions on compact Riemannian manifolds. These consistency conditions are derived by using spectral decompositions to write quadruple overlap integrals in terms of products of triple overlap integrals in multiple ways. In this paper, we show how these consistency conditions imply bounds on the Laplacian eigenvalues and triple overlap integrals of closed hyperbolic manifolds, in analogy to the conformal bootstrap bounds on conformal field theories. We find an upper bound on the gap between two consecutive nonzero eigenvalues of the Laplace-Beltrami operator in terms of the smaller eigenvalue, an upper bound on the smallest eigenvalue of the rough Laplacian on symmetric, transverse-traceless, rank-2 tensors, and bounds on integrals of products of eigenfunctions and eigentensors. Our strongest bounds involve numerically solving semidefinite programs and are presented as exclusion plots. We also prove the analytic bound $λ_{i+1} \leq 1/2+3 λ_i+\sqrt{λ_i^2+2 λ_i+1/4}$ for consecutive nonzero eigenvalues of the Laplace-Beltrami operator on closed orientable hyperbolic surfaces. We give examples of genus-2 surfaces that nearly saturate some of these bounds. To derive the consistency conditions, we make use of a transverse-traceless decomposition for symmetric tensors of arbitrary rank.
description: 32 pages, 10 figures
St. Peter's Chapel Services Group, Rector Russell Bourne
Creators: name: Springs Historical Society/Library
Publisher: name: Unknown
Year: 1916
Subjects: Springs
East Hampton
Churches
St. Peter's Chapel

description: This image shows a group of church attendees dressed for colder weather outside of St. Peter's Chapel sometime between 1916 and 1920 when Rector Russell Bourne was in charge of the parish.
description: This material was lent to the Long Island Collection by the Springs Historical Society Library for digitization purposes.
Dolichogenidea borysthenica
Creators: name: Fernandez-Triana, Jose
name: Sakagami, Kota
name: Shimizu, So
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Dolichogenidea
Dolichogenidea borysthenica

description: D. borysthenica (Kotenko, 1986): Flagellomere 14 length 1.5 times its width; propodeum smooth and shiny; ovipositor sheath much longer (1.6–1.8 times) than metatibia.
description: Published as part of Fernandez-Triana, Jose, Sakagami, Kota & Shimizu, So, 2018, Dolichogenidea maetoi sp. nov. (Hymenoptera: Braconidae) from Japan, the first parasitoid wasp recorded from Hyblaea fortissima (Lepidoptera), pp. 167-175 in Acta Entomologica Musei Nationalis Pragae 58 (1) on page 171, DOI: 10.2478/aemnp-2018-0014, http://zenodo.org/record/3699178
Interfacial anisotropic exciton-polariton manifolds in ReS$_2$
Creators: name: Chakrabarty, Devarshi
name: Dhara, Avijit
name: Ghosh, Kritika
name: Pattanayak, Aswini K.
name: Mukherjee, Shreyashi
name: Chaudhuri, Ayan Roy
name: Dhara, Sajal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Light-matter coupling in van der Waal's materials holds significant promise in realizing Bosonic condensation and superfluidity. The underlying semiconductor's crystal asymmetry, if any, can be utilized to form anisotropic half-light half-matter quasiparticles. We demonstrate generation of such highly anisotropic exciton-polaritons at the interface of a biaxial layered semiconductor, stacked on top of a distributed Bragg reflector. The spatially confined photonic mode in this geometry couples with polarized excitons and their Rydberg states, creating a system of highly anisotropic polariton manifolds, displaying Rabi splitting of up to 68 meV. Rotation of the incident beam polarization is used to tune coupling strength and smoothly switch regimes from weak to strong coupling, while also enabling transition from one three-body coupled oscillator system to another. Light-matter coupling is further tunable by varying the number of weakly coupled optically active layers. Our work provides a versatile method of engineering devices for applications in polarization-controlled polaritonics and optoelectronics.
description: Main text: 14 pages, 4 figures, Supplemental material: 8 pages, 10 figures
Scatterings of Massive String States from D-brane and Their Linear Relations at High Energies
Creators: name: Chan, Chuan-Tsung
name: Lee, Jen-Chi
name: Yang, Yi
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study scatterings of bosonic massive closed string states at arbitrary mass levels from D-brane. We discover that all the scattering amplitudes can be expressed in terms of the generalized hypergeometric function with special arguments, which terminates to a finite sum and, as a result, the whole scattering amplitudes consistently reduce to the usual beta function. For the simple case of D-particle, we explicitly calculate high-energy limits of a series of the above scattering amplitudes for arbitrary mass levels, and derive infinite linear relations among them for each fixed mass level. The ratios of these high-energy scattering amplitudes are found to be consistent with the decoupling of high-energy zero-norm states of our previous works.
description: 19 pages, no figure. v2:some minor corrections, refs added. v3:minor changes and final in Nucl.Phys.B
Real-time monitoring shows substantial excess all-cause mortality during second wave of COVID-19 in Europe, October to December 2020
Creators: name: Nørgaard, Sarah K.
name: Vestergaard, Lasse S.
name: Nielsen, Jens
name: Richter, Lukas
name: Schmid, Daniela
name: Bustos, Natalia
name: Braye, Toon
name: Athanasiadou, Maria
name: Lytras, Theodore
name: Denissov, Gleb
name: Veideman, Tatjana
name: Luomala, Oskari
name: Möttönen, Teemu
name: Fouillet, Anne
name: Caserio-Schönemann, Céline
name: An Der Heiden, Matthias
name: Uphoff, Helmut
name: Gkolfinopoulou, Kassiani
name: Bobvos, Janos
name: Paldy, Anna
name: Rotem, Naama
name: Kornilenko, Irene
name: Domegan, Lisa
name: O’Donnell, Joan
name: De Donato, Francesca
name: Scortichini, Matteo
name: Hoffmann, Patrick
name: Velez, Telma
name: England, Kathleen
name: Calleja, Neville
name: Van Asten, Liselotte
name: Stoeldraijer, Lenny
name: White, Richard A.
name: Paulsen, Trine H.
name: Da Silva, Susana P.
name: Rodrigues, Ana P.
name: Klepac, Petra
name: Zaletel, Metka
name: Fafangel, Mario
name: Larrauri, Amparo
name: León, Inmaculada
name: Farah, Ahmed
name: Galanis, Ilias
name: Junker, Christoph
name: Perisa, Damir
name: Sinnathamby, Mary
name: Andrews, Nick
name: O'Doherty, Mark G.
name: Irwin, David
name: Kennedy, Sharon
name: McMenamin, Jim
name: Adlhoch, Cornelia
name: Bundle, Nick
name: Penttinen, Pasi
name: Pukkila, Jukka
name: Pebody, Richard
name: Krause, Tyra G.
name: Mølbak, Kåre
Publisher: name: Robert Koch-Institut
Year: 2021
Subjects: subject: 610 Medizin und Gesundheit

description: The coronavirus disease (COVID-19) global pandemic is ongoing, with Europe and the Americas the current epicentres of transmission. As at 1 January, 2021, over 82 million cases and 1.8 million deaths have been reported globally [1,2]. In Europe alone, the number of cases reported has now passed 26 million, with over 580,000 laboratory-confirmed COVID-19 deaths [3,4]. As many COVID-19 cases and deaths may not be confirmed by virological testing, and as the pandemic causes a range of indirect and collateral harms, the officially reported figures of laboratory-confirmed COVID-19 cases and deaths represent only a part of the total disease, mortality and overall public health burden associated with the pandemic. Here we report some noteworthy estimates of a marked increase in excess all-cause mortality in Europe coinciding with a steep second wave of COVID-19 in many countries since September 2020.
Borinic acid polymers and their supramolecular networks
Creators: name: Baraniak, Monika Katarzyna
Publisher: name: No Publisher Supplied
Year: 2021

description: Boronic acid-substituted polymers are an attractive class of materials with broad potential applications in functional materials, chemo- and biosensors, as well as supported catalysts. In this work we present the synthesis of a new class of more electron-deficient borinic acid polymers, investigations into their use as catalysts in amide bond formation, and studies on their supramolecular assembly and polymer network formation.We prepared two highly electron-deficient borinic acid copolymers, poly(styrene- co-2,4-dichlorophenyl borinic acid) and poly(styrene-co-3,5-dichlorophenyl borinic acid). The polymers and their corresponding model compounds, 2,4- and 3,5-substituted (dichlorophenyl)(tert-butylphenyl)borinic acid, were examined as catalysts in the amide bond formation reaction between phenylacetic acid and benzylamine. The 3,5- dichlorophenyl borinic acid derivatives proved to be the more effective catalysts. Mechanistic studies suggested that the borane Lewis acid-catalyzed coupling involves initial acid-induced protodeboronation to release dichlorophenyl boronic acid as the active catalyst. Furthermore, these borinic acid polymers are shown to form supramolecular assemblies via Lewis acid – Lewis base interactions and reversible covalent B-O-B bond formation. The dynamic processes were studied in detail by variable temperature (VT) NMR on the molecular model compounds and the respective pyridine-complexed boroxanes, R’RB-O-BRR’(Py).In a second project, we investigated the use of borinic acid polymers in the formation of dynamic polymer networks with poly(dimethylsiloxane) (PDMS) as a soft and flexible component. These network polymers are crosslinked by boron-8- hydroxyquinolate moieties. We first prepared a series of model compounds by reaction of tBu- and 3,5Cl2-substituted (phenyl)(styrene)borinic acids (X = t-Bu and X = 3,5Cl2) with different 8-hydroxyquinoline ligands (8-hydroxyquinoline (HQ), 5-formyl-8- hydroxyquinoline (FHQ), 5-propylimino-8-hydroxyquinole (NHQ)) to study the dynamic nature of the B-O-C bonds in the presence of the quinoline nitrogen donor atom that is intramolecularly coordinated to the boron center. Six different boron-8-hydroxyquinolate complexes were used in exchange studies of free hydroxyquinolines with boron-bound hydroxyquinolines, as well as between different boron-bound hydroxyquinolines. Quantitative data on the thermodynamics of these exchange processes provide important insights into the expected dynamic processes in the supramolecular polymer networks. We then prepared polymer networks with chromophoric boron 8-hydroxyquinolate dynamic cross-links in the form of thin films by reacting 8-hydroxyquinoline-terminated PDMS with the borinic acid polymers. The resulted novel supramolecular polymer networks (SPNs) show an emergence of strong fluorescence due to formation of the fluorescent boron chelate complexes. We confirmed the SPN formation through 1H NMR studies and photophysical studies of the model complexes and the films.
Does a pristine, unreconstructed SrTiO$_3$(001) surface exist?
Creators: name: Sokolović, Igor
name: Franceschi, Giada
name: Wang, Zhichang
name: Xu, Jian
name: Pavelec, Jiří
name: Riva, Michele
name: Schmid, Michael
name: Diebold, Ulrike
name: Setvín, Martin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The surfaces of perovskite oxides affect their functional properties, and while a bulk-truncated (1$\times$1) termination is generally assumed, its existence and stability is controversial. Here, such a surface is created by cleaving the prototypical SrTiO$_3$(001) in ultra-high vacuum, and its response to thermal annealing is observed. Atomically resolved nc-AFM shows that intrinsic point defects on the as-cleaved surface migrate at temperatures above 200\,$^\circ$C. At 400--500\,$^\circ$C, a disordered surface layer forms, albeit still with a (1$\times$1) pattern in LEED. Purely TiO$_2$-terminated surfaces, prepared by wet-chemical treatment, are also disordered despite their (1$\times$1) periodicity in LEED.
Dolichogenidea celsa
Creators: name: Fernandez-Triana, Jose
name: Sakagami, Kota
name: Shimizu, So
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Dolichogenidea
Dolichogenidea celsa

description: D. celsa (Papp, 1975): Flagellomere 14 length 1.5 times its width; ovipositor sheath much longer (approximately 1.5 times) than metatibia.
description: Published as part of Fernandez-Triana, Jose, Sakagami, Kota & Shimizu, So, 2018, Dolichogenidea maetoi sp. nov. (Hymenoptera: Braconidae) from Japan, the first parasitoid wasp recorded from Hyblaea fortissima (Lepidoptera), pp. 167-175 in Acta Entomologica Musei Nationalis Pragae 58 (1) on page 171, DOI: 10.2478/aemnp-2018-0014, http://zenodo.org/record/3699178
Causal inference and applications in e-commerce
Creators: name: Li, Qiang
Publisher: name: No Publisher Supplied
Year: 2021

description: The dissertation consists of three self-contained but related essays on causal inference and its applications in e-commerce operations. The first two chapters adopt econometric models, especially causal inference related models, to provide empirical evidence on the value of environmental responsibility and high-quality logistics on e-commerce platforms. According to the needs of empirical study, the last chapter develops an improved causal inference algorithm, which provides more robust estimation results and is conducive to empirical studies. In particular, Chapter 2 empirically studies the impacts of an environmental regulation on secondary markets, which is considered as an important part of sustainable operations. In the paper, we adopt the difference-in-differences with the synthetic control method to study a natural experiment: the implementation of Shanghai's compulsory waste-sorting regulation that took effect on July 1, 2019. We study two key market outcome variables: number of listings and purchase volume. The study finds that due to a strong sense of environmental responsibility, the implementation of a waste-sorting regulation resulted in an 8.42% decrease in the number of resale listings posted by the young generations──that are sensitive to the environmental outcomes──in secondary markets. The second essay, in Chapter 3, studies how and to what extent customers value the high-quality delivery service on a leading online retail platform. Specifically, we employ the difference-in-differences identification to study a natural experiment and analyze 129,448 representative SKUs' market performance on a leading retail platform. The study seeks to quantify the economic value of high-quality logistics services. We find that logistics matters to online platforms: For example, the removal of a high-quality delivery option could reduce sales of Alibaba's retail platform by 14.56%. Last, the third essay, in Chapter 4, develops an improved causal inference algorithm called Stable Synthetic Control (Stable-SC), which combines the synthetic control method with anomaly detection algorithms. The algorithm seeks to mitigate the impact of confounding factors on estimation results, especially in the treatment (or post-treatment) periods. In the study, we further apply the improved algorithm to a few simulated and real-world datasets, and all experimental results demonstrate that our Stable-SC method provides more robust estimation results even under the challenging data environment with serious confounding factors.
Post-Newtonian Theory and Dimensional Regularization
Creators: name: Blanchet, Luc
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Inspiralling compact binaries are ideally suited for application of a high-order post-Newtonian (PN) gravitational wave generation formalism. To be observed by the LIGO and VIRGO detectors, these very relativistic systems (with orbital velocities of the order of 0.5c in the last rotations) require high-accuracy templates predicted by general relativity theory. Recent calculations of the motion and gravitational radiation of compact binaries at the 3PN approximation using the Hadamard self-field regularization have left undetermined a few dimensionless coefficients called ambiguity parameters. In this article we review the application of dimensional self-field regularization, within Einstein's classical general relativity formulated in D space-time dimensions, which finally succeeded in clearing up the problem, by uniquely fixing the values of all the ambiguity parameters.
description: 16 pages, to appear in the Proceedings of the "Albert Einstein Century Conference", Paris (2005), edited by Jean-Michel Alimi
Applications of machine learning in empirical asset pricing
Creators: name: Gao, Cheng
Publisher: name: No Publisher Supplied
Year: 2021

description: This dissertation explores applications of machine learning methods in empirical asset pricing. The focus of machine learning methods is predictability, which is an important task in empirical asset pricing; therefore, it is natural to apply machine learning methods to solve predictability problems in empirical asset pricing. In my dissertation, one chapter examines predictability in intraday stock returns and the other chapter in mutual fund performance with the help of machine learning methods. The first chapter predicts intraday stock returns via machine learning methods. This chapter introduces SHapley Additive exPlanations (SHAP) to overcome the challenge of economic interpretability faced by researchers in applying machine learning methods. In particular, we adopt tree-based machine learning methods to predict intraday stock returns with predictors basing on past trading information and news data and then interpret the model predictions with SHAP. Our forecasts generate an out-of-sample R2 of 3.93% for predicting last half hour stock returns and of 9.88% for predicting first half-hour stock returns, which could be translated into huge economic gains; in addition, our results indicate that intraday returns are dominated by short term reversal effect. The second chapter examines the predictability of mutual fund performance. I aim to find out the relations between predictors and future long term fund performance. Predictive panel regressions show that the linear relations between predictors and the fund performance are not stable and robust. Tree-based methods could generate relatively accurate out-of-sample forecasts, which shows the relatively strong power of nonlinear methods in modeling the relation between fund performance and the corresponding predictors and could be translated into large economic gains. In addition, I find that the intrinsic value, liquidity and profitability of the stock holdings in the fund portfolio are important predictors of long term fund performance. My findings help complement the applications of machine learning methods to predict fund performance.
On the Art of Modelling in Constraint-Based Scheduling: new methods, theory and applications
Creators: name: Edwards, Steven John
Publisher: name: Monash University
Year: 2022
Subjects: subject: 10303 Optimisation
subject: FOS: Mathematics
subject: 10206 Operations Research

description: Advanced cell staining is the process of using chemicals and dyes to enhance the visualisation of cellular subcomponents of tissue samples. The technique is frequently used to help pathologists identify the presence or prevalence of particular cell types, structures or microorganisms for the diagnosis of cancers and infectious diseases. Due to an increasing demand for this technology, a need for automation arose. This thesis considers how such automated systems can be efficiently programmed to process large quantities of tests efficiently. To do so, we study modelling choices in Constraint-Based Scheduling - the application of Constraint Programming to scheduling problems. The models are improved by using novel ideas of symmetry elimination, driving variables and interval clusters. The thesis demonstrates how these methodological improvements are crucial to solving this scheduling problems.
Speckle Observations of TESS Exoplanet Host Stars: Understanding the Binary Exoplanet Host Star Orbital Period Distribution
Creators: name: Howell, Steve B.
name: Matson, Rachel A.
name: Ciardi, David R.
name: Everett, Mark E.
name: Livingston, John H.
name: Scott, Nicholas J.
name: Horch, Elliott P.
name: Winn, Joshua N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present high-resolution speckle interferometric imaging observations of TESS exoplanet host stars using the NN-EXPLORE NESSI instrument the at the 3.5-m WIYN telescope. Eight TOIs, that were originally discovered by Kepler, were previously observed using the Differential Speckle Survey Instrument (DSSI). Speckle observations of 186 TESS stars were carried out and 45 (24%) likely bound companions were detected. This is approximately the number of companions we would expect to observe given the established 46% binarity rate in exoplanet host stars. For the detected binaries, the distribution of stellar mass ratio is consistent with that of the standard Raghavan distribution and may show a decrease in high-q systems as the binary separation increases. The distribution of binary orbital periods, however, is not consistent with the standard Ragahavan model and our observations support the premise that exoplanet-hosting stars with binary companions have, in general, wider orbital separations than field binaries. We find that exoplanet-hosting binary star systems show a distribution peaking near 100 au, higher than the 40-50 au peak that is observed for field binaries. This fact led to earlier suggestions that planet formation is suppressed in close binaries.
Dolichogenidea cheles
Creators: name: Fernandez-Triana, Jose
name: Sakagami, Kota
name: Shimizu, So
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Dolichogenidea
Dolichogenidea cheles

description: D. cheles (Nixon, 1972): Pterostigma with two pale spots (at base and apex); flagellomeres pale ventrally, with apical flagellomeres also pale dorsally.
description: Published as part of Fernandez-Triana, Jose, Sakagami, Kota & Shimizu, So, 2018, Dolichogenidea maetoi sp. nov. (Hymenoptera: Braconidae) from Japan, the first parasitoid wasp recorded from Hyblaea fortissima (Lepidoptera), pp. 167-175 in Acta Entomologica Musei Nationalis Pragae 58 (1) on page 171, DOI: 10.2478/aemnp-2018-0014, http://zenodo.org/record/3699178
Dynamic composition and management of emergency response processes
Creators: name: Elahraf, Abeer
Publisher: name: No Publisher Supplied
Year: 2021

description: The number of disasters, whether human-made or natural, has been on the rise over in the recent years; they have destroyed lives, homes, and caused widespread damage to infrastructure. The increase in disasters means there is also a higher demand for efficient response planning. Effective emergency response planning requires communication and coordination with the diverse operational systems belonging to various collaborating government agencies, non-government organizations (NGOs), and private sector entities. An essential requirement for developing an emergency response process is to establish information sharing and system-level interoperability among the operational systems of collaborating organizations. The challenge is that emergency response processes are not well-structured and do not have a well-defined outcome; they are knowledge-centric. Their workflow structure and execution may evolve dynamically based on the environmental context and the type of service or activity invoked during process execution. It is impractical to define static plans and response process workflows for every possible situation since unforeseeable situations may arise. Thus, a dynamic response requires adaptability to a changing situation as an incident evolves. In this thesis, we develop an iterative end-to-end solution for the dynamic composition and management of an Emergency Response Management System, called Dynamic Emergency Response Processes System (DERPS). DERPS allows the Incident Commander to develop a contextualized response using ontology-based reasoning and allows its dynamic adaptation to situational changes. We also adapt and apply DERPS in the COVID-19 context. Specifically, given the pandemic’s scale and scope, home-based isolation has been considered a potential first step to reduce the spread of the virus and limit the stress on the healthcare system. However, home-based isolation needs and requirements are unique for each patient. We show how DERPS can be utilized to develop personalized patient care plans to ensure that each patient’s needs are appropriately met while they are confined to their home. We develop a prototype implementation to show the feasibility of the proposed framework and discuss challenges and issues in deploying such a system in practice.
Axisymmetric investigation of differential rotation in contracting stellar radiative zones
Creators: name: Gouhier, B.
name: Lignières, F.
name: Jouve, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Context. Stars experience rapid contraction or expansion at different phases of their evolution. Modelling the angular momentum and chemical elements transport occurring during these phases remains an unsolved problem. Aims. We study a stellar radiative zone undergoing radial contraction and investigate the induced differential rotation and meridional circulation. Methods. We consider a rotating spherical layer crossed by an imposed radial velocity field that mimics the contraction and solve numerically the axisymmetric hydrodynamical equations in both the Boussinesq and anelastic approximations. An extensive parametric study is conducted to cover regimes of contraction, rotation, stable stratification and density stratification that are relevant for stars. Results. The differential rotation and the meridional circulation result from a competition between the contraction-driven inward transport of angular momentum and an outward transport dominated by either viscosity or an Eddington-Sweet type circulation, depending on the value of the $P_r \left( N_0 / Ω_0 \right)^2 $ parameter, where $P_r$ is the Prandtl number, $N_0$ the Brunt-Väisäilä frequency and $Ω_0$ the rotation rate. Taking the density stratification into account is important to study more realistic radial contraction fields but also because the resulting flow is less affected by unwanted effects of the boundary conditions. In these different regimes and for a weak differential rotation, we derive scaling laws that relate the amplitude of the differential rotation to the contraction timescale.
description: 24 pages, 16 figures, 8 tables
Optimal transport in reinforcement learning
Creators: name: Givchi, Arash
Publisher: name: No Publisher Supplied
Year: 2021

description: We consider constrained policy optimization in Reinforcement Learning (RL), where the constraints are in form of marginals on state visitations and global action executions. Given these distributions, we formulate policy optimization as unbalanced optimal transport over the set of occupancy measures. We propose a general purpose RL objective based on Bregman divergence and optimize it using Dykstra's algorithm. The approach admits a large scale algorithm for when the state or action space is large and only samples from the marginals are available. We discuss applications of our approach and provide demonstrations to show the effectiveness of our algorithm.
On the Art of Modelling in Constraint-Based Scheduling: new methods, theory and applications
Creators: name: , John
Publisher: name: Monash University
Year: 2019
Subjects: subject: 10303 Optimisation
subject: FOS: Mathematics
subject: 10206 Operations Research

description: Advanced cell staining is the process of using chemicals and dyes to enhance the visualisation of cellular subcomponents of tissue samples. The technique is frequently used to help pathologists identify the presence or prevalence of particular cell types, structures or microorganisms for the diagnosis of cancers and infectious diseases. Due to an increasing demand for this technology, a need for automation arose. This thesis considers how such automated systems can be efficiently programmed to process large quantities of tests efficiently. To do so, we study modelling choices in Constraint-Based Scheduling - the application of Constraint Programming to scheduling problems. The models are improved by using novel ideas of symmetry elimination, driving variables and interval clusters. The thesis demonstrates how these methodological improvements are crucial to solving this scheduling problems.
An Algorithm to Satisfy the QoS Requirements in a Heterogeneous LoRaWAN Network
Creators: name: Bankov, Dmitry
name: Khorov, Evgeny
name: Lyakhov, Andrey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: LoRaWAN is a popular low power wide area network technology widely used in many scenarios, such as environmental monitoring and smart cities. Different applications demand various quality of service (QoS), and their service within a single network requires special solutions for QoS provision. We consider the problem of QoS provision in heterogeneous LoRaWAN networks that consist of several groups of devices that require different packet loss rate (PLR). To solve this problem, we develop a mathematical model that can find the PLR distribution in a LoRaWAN network. With the model, we show that the PLR can vary significantly, and it is wrong to consider only the average PLR for the QoS provision. Finally, we develop an algorithm for assigning modulation and coding schemes to end-devices that provides PLRs below the required thresholds.
Ultrasensitive Proximity Josephson Sensor with Kinetic Inductance Read-Out
Creators: name: Giazotto, F.
name: Heikkila, T. T.
name: Helisto, G. Pepe. P.
name: Luukanen, A.
name: Pekola, J. P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We propose a mesoscopic kinetic-inductance radiation detector based on a long superconductor--normal metal--superconductor Josephson junction. The operation of this proximity Josephson sensor (PJS) relies on large kinetic inductance variations under irradiation due to the exponential temperature dependence of the critical current. Coupled with a dc SQUID readout, the PJS is able to provide a signal to noise (S/N) ratio up to ~10^3 in the THz regime if operated as calorimeter, while electrical noise equivalent power (NEP) as low as ~7x10^{-20} W(Hz)^(-1/2) at 200 mK can be achieved in the bolometer operation. The high performance together with the ease of fabrication make this structure attractive as an ultrasensitive cryogenic detector of THz electromagnetic radiation.
description: 4 pages, 3 figures
A study of the factors affecting copper cementation of gold from ammoniacal thiosulphate solution
Creators: name: Guerra, Eduard
Publisher: name: University of British Columbia
Year: 2009

description: Thiosulphate leaching of gold is a proposed alternative to cyanide leaching for certain types of refractory gold ores. The most promising method for recovering gold from thiosulphate leach solutions is by copper cementation. This study focused on determining how the factors of pH/ammonia concentration, copper concentration, thiosulphate concentration, sulphite concentration, and temperature, commonly manipulated in thiosulphate leaching studies, affect gold cementation performance using copper. These factors were varied in artificial leach solutions according to the ranges typically found in literature. Both powder cementation and rotating disk electrode cementation were used to study the kinetics of gold cementation. Overall, the cementation of gold by copper from ammoniacal thiosulphate solution was concluded to be under mass transfer control. Higher temperatures and pH/ammonia concentration were determined to positively affect the rate of gold cementation. Conversely, sulphite and copper in solution were established to negatively affect cementation performance.
HI 21cm observations of the PG1216+069 sub-DLy-alpha absorber field at z=0.00632
Creators: name: Briggs, F. H.
name: Barnes, D. G.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Westerbork Synthesis Radio Telescope finds a weak 21cm line emission feature at the coordinates (RA-Dec-velocity) of the sub-Damped Lyman-alpha absorber observed at z_abs=0.00632 in the spectrum of PG1216+069. The emission feature, WSRT-J121921+0639, lies within 30" of the quasar sightline, is detected at 99.8% (3 sigma) confidence level, has M_HI between 5 and 15x10^6 M_solar, and has velocity spread between 20 and 60 km/s. Other HI emitters in the field include VCC297 at a projected distance of 86/h_75 kpc and a previously unreported HI cloud, WSRT-J121919+0624 at 112/h_75 kpc with M_HI ~ 3x10^8 M_solar. The optically identified, foreground galaxy that is closest to the quasar sightline appears to be VCC339 (~L*/25) at 29/h_75 kpc and velocity offset 292 km/s . A low surface brightness galaxy with the HI mass of the sub-DLA absorber WSRT-J121921+0639 would likely have m_B ~ 17, and its diffuse optical emission would need to compete with the light of both the background QSO and a brighter foreground star ~10" from the QSO sight line.
description: 10 pages, 2 figures, accepted for publication in ApJLett
Exploiting network and dynamics for talent management
Creators: name: Teng, Mingfei
Publisher: name: No Publisher Supplied
Year: 2021

description: Network and dynamics based analysis addresses various problems in talent management, emphasizing the connection, the influence and temporal factors in the working social network between different units (employees, departments, and companies). Nowadays, most contemporary commercial activities such as production, sales are organized by companies, which connect employees with various roles and levels into an intact network and involves broadly and deeply corporations; the environment composed of colleagues, departments, and companies inevitably generate positive or negative influences on the individuals, shaping their working behaviors, essentially impact the daily operations of the company; with the digitalization in industries, the abundant data of peoples' working make it feasible to analyze the role of social connections & influences in working and provide an insight into the patterns in communications between individual units in the working social network, and facilitate to develop data-driven applications to assist decision-making process in the management. Our main contribution is to incorporate the social influence & network connections to provide intelligent solutions for different tasks in management such as turnover prediction and job position hierarchy extraction.Specifically, we first propose a contagious effect heterogeneous neural network (CEHNN) for individual turnover prediction. The network encodes the connections between employees based on the hierarchy of companies and formulates it as a sequential classification problem with the series of prior-connected-employee turnover events and other environment and profile factors. Further, we design a Turnover Influence-based Neural Network (TINN), which explicitly integrates the company's internal social networks like email and instant messages, models the diffusion of the turnover influences on these networks, and fuses them to forecast the turnover rate of departments. In addition, at the job level, we show that based on the aggregated job-hopping records, a framework is built to learn the vector representations of job positions across many companies, which is further utilized to reconstruct the hierarchy of job positions, identifying the potential links between them and predicting their rankings.The above approaches are validated for extensive experiments on real-world datasets, demonstrating their effectiveness, and the case studies reveal some interpretable findings which provide actionable insight into intelligent management.