cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Generalized uncertainty principle with maximal observable momentum and no minimal length indeterminacy
Creators: name: Petruzziello, Luciano
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a novel generalization of the Heisenberg uncertainty principle which introduces the existence of a maximal observable momentum and at the same time does not entail a minimal indeterminacy in position. The above result is an exact generalized uncertainty principle (GUP), valid at all energy scales. For small values of the deformation parameter $β$, our ansatz is consistent with the usual expression for GUP borrowed from string theory, doubly special relativity and other quantum gravity candidates that provide $β$ with a negative sign. As a preliminary analysis, we study the implications of this new model on some quantum mechanical applications and on the black hole thermodynamics.
Elliptic enumeration of nonintersecting lattice paths
Creators: name: Schlosser, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 05A15 (Primary) 05A17, 05A19, 05E10, 11B65, 33D15, 33E20 (Secondary)

description: We enumerate lattice paths in the planar integer lattice consisting of positively directed unit vertical and horizontal steps with respect to a specific elliptic weight function. The elliptic generating function of paths from a given starting point to a given end point evaluates to an elliptic generalization of the binomial coefficient. Convolution gives an identity equivalent to Frenkel and Turaev's 10-V-9 summation. This appears to be the first combinatorial proof of the latter, and at the same time of some important degenerate cases including Jackson's 8-phi-7 and Dougall's 7-F-6 summation. By considering nonintersecting lattice paths we are led to a multivariate extension of the 10-V-9 summation which turns out to be a special case of an identity originally conjectured by Warnaar, later proved by Rosengren. We conclude with discussing some future perspectives.
description: minor changes, 17 pages, to appear in JCTA
Traveling Wave Solutions for Fifth Order (1+1)-Dimensional Kaup-Keperschmidt Equation with the Help of Exp(-Phi)-Expansion Method
Creators: name: Harun Or ROSHID, Md. Nur ALAM, M. Ali AKBAR
Publisher: name: Walailak University
Year: 2015
Subjects: The exp(-Phi)-expansion method, the fifth order (1+1)-dimensional Kaup-Keperschmidt equation, traveling wave solutions, nonlinear evolution equation

description: 11, 12, Walailak Journal of Science and Technology
The Fundamental Plane of Massive Quiescent Galaxies at z~2
Creators: name: Stockmann, Mikkel
name: Jørgensen, Inger
name: Toft, Sune
name: Conselice, Christopher J.
name: Faisst, Andreas
name: Margalef-Bentabol, Berta
name: Gallazzi, Anna
name: Zibetti, Stefano
name: Brammer, Gabriel B.
name: Gómez-Guijarro, Carlos
name: Hirschmann, Michaela
name: Lagos, Claudia D.
name: Valentino, Francesco M.
name: Zabl, Johannes
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We examine the Fundamental Plane (FP) and mass-to-light ratio ($M/L$) scaling relations using the largest sample of massive quiescent galaxies at $1.511.26$, subset of 8 quiescent galaxies at $z>2$, from Stockmann et al. (2020), we show that they cannot passively evolve to the local Coma cluster relation alone and must undergo significant structural evolution to mimic the sizes of local massive galaxies. The evolution of the FP and $M/L$ scaling relations, from $z=2$ to present-day, for this subset are consistent with passive aging of the stellar population and minor merger structural evolution into the most massive galaxies in the Coma cluster and other massive elliptical galaxies from the MASSIVE Survey. Modeling the luminosity evolution from minor merger added stellar populations favors a history of merging with "dry" quiescent galaxies.
description: 17 pages, 6 figures
A film centre for Vancouver, British Columbia
Creators: name: Schupp, John Alvin
Publisher: name: University of British Columbia
Year: 2009

description: This Thesis Project began as an attempt to explore the basic principles of Cinema: Light, Time and Movement. As the project evolved I began to explore and develop various design ideas. These included: the exploration of voyeuristic qualities within Cinema and Architec tural ideas based on illusion and rhythm; cinema as a medium; and, geometric maipulations and how different geometries might co-exist in an attempt to foster an image of diversity while defocusing the stereotypical idea of school and institution. The final product consisted of a 36,000 sq. ft. Film Centre, that housed a Film School, Indoor and Outdoor Cinemas, the Vancouver Film Festival Offices, a multi-media Restaurant and an Independant Film Studio.
Subharmonic Almost Periodic Functions
Creators: name: Favorov, S.
name: Rakhnin, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Complex Variables (math.CV)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42A75(Primary), 30B50(Secondary)

description: We prove that almost periodicity in the sense of distributions coincides with almost periodicity with respect to Stepanov's metric for the class of subharmonic functions in a horizontal strip. We also prove that Fourier coefficients of these functions are continuous functions in Im z. Further, if the logarithm of a subharmonic almost periodic function is a subharmonic function, then it is almost periodic.
Disformal transformations and the motion of a particle in semi-classical gravity
Creators: name: Chowdhury, Sandip
name: Pal, Kunal
name: Pal, Kuntal
name: Sarkar, Tapobrata
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The approach to incorporate quantum effects in gravity by replacing free particle geodesics with Bohmian non-geodesic trajectories has an equivalent description in terms of a conformally related geometry, where the motion is force free, with the quantum effects inside the conformal factor, i.e., in the geometry itself. For more general disformal transformations relating gravitational and physical geometries, we show how to establish this equivalence by taking the quantum effects inside the disformal degrees of freedom. We also show how one can solve the usual problems associated with the conformal version, namely the wrong continuity equation, indefiniteness of the quantum mass, and wrong description of massless particles in the singularity resolution argument, by using appropriate disformal transformations.
description: 18 Pages, LaTeX
A model for the Twitter sentiment curve
Creators: name: Aletti, Giacomo
name: Crimaldi, Irene
name: Saracco, Fabio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Twitter is among the most used online platforms for the political communications, due to the concision of its messages (which is particularly suitable for political slogans) and the quick diffusion of messages. Especially when the argument stimulate the emotionality of users, the content on Twitter is shared with extreme speed and thus studying the tweet sentiment if of utmost importance to predict the evolution of the discussions and the register of the relative narratives. In this article, we present a model able to reproduce the dynamics of the sentiments of tweets related to specific topics and periods and to provide a prediction of the sentiment of the future posts based on the observed past. The model is a recent variant of the Pólya urn, introduced and studied in arXiv:1906.10951 and arXiv:2010.06373, which is characterized by a "local" reinforcement, i.e. a reinforcement mechanism mainly based on the most recent observations, and by a random persistent fluctuation of the predictive mean. In particular, this latter feature is capable of capturing the trend fluctuations in the sentiment curve. While the proposed model is extremely general and may be also employed in other contexts, it has been tested on several Twitter data sets and demonstrated greater performances compared to the standard Pólya urn model. Moreover, the different performances on different data sets highlight different emotional sensitivities respect to a public event.
description: 19 pages, 12 figures
Energy gain of heavy quarks by fluctuations in the QGP
Creators: name: Chakraborty, Purnendu
name: Mustafa, Munshi Golam
name: Thoma, Markus H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The collisional energy gain of a heavy quark due to chromo-electromagnetic field fluctuations in a quark-gluon plasma is investigated. The field fluctuations lead to an energy gain of the quark for all temperatures and velocities. The net effect is a reduction of the collisional energy loss by 15-40% for parameters relevant at RHIC energies.
description: 6 pages, 4 figures, extended version, accepted for publication in Phys. Rev. C
The Effect of Indirect Interpersonal Exposure to Counseling on Willingness through Attitudes
Creators: name: Huh, Gloria
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Counseling psychology
subject: Psychology
subject: FOS: Psychology
subject: Asian American
subject: collectivism
subject: counseling
subject: exposure
subject: help seeking attitudes
subject: willingness

description: The present study examined whether attitudes toward seeking professional psychological help partially mediated the relationship between the frequency and valence of Asian Americans’ indirect interpersonal exposure to counseling and willingness to see a counselor. Statistically significant indirect effects were found. An exploratory factor analysis revealed that indirect interpersonal exposure to counseling through family members and friends emerged as two distinct factors. Partial mediation was found only for the frequency of indirect interpersonal exposure to counseling through family members on willingness to see a counselor (personal, academic/career, health problems) through attitudes. Using hierarchical linear regression, this study examined whether collectivism moderated the relationship between the frequency and valence of indirect interpersonal exposure to counseling on attitudes toward seeking professional psychological help. Moderation was not found. Collectivism and conformity to norms did not moderate the relationship between indirect interpersonal exposure to counseling through family members and friends on attitudes.
On Nova Scorpii 2007 N.1 (V1280 Sco)
Creators: name: Kuncarayakti, Hanindyo
name: Kristyowati, Desima
name: Kunjaya, Chatief
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of our photometric and spectroscopic observations of Nova Sco 2007 N.1 (V1280 Sco). The photometric data was represented by a single data point in the light curve since the observation was carried out only for one night. The spectra cover two different phases of the object's evolution during the outburst, i.e. pre-maximum and post-maximum. Measurements of the P-Cygni profile on Na I 'D' line (5889 Å) was derived as the velocity of shell expansion, yielding $1567.43 \pm 174.14$ km s$^{-1}$. We conclude that V1280 Sco is a fast Fe II-type nova.
description: Accepted for publication in Astrophysics & Space Science
Photon Bubbles in the Circumstellar Envelopes of Young Massive Stars
Creators: name: Turner, N. J.
name: Quataert, E.
name: Yorke, H. W.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We show that the optically-thick dusty envelopes surrounding young high-mass stars are subject to the photon bubble instability. The infrared radiation passing through the envelope amplifies magnetosonic disturbances, with growth rates in our local numerical radiation MHD calculations that are consistent with a linear analysis. Modes with wavelengths comparable to the gas pressure scale height grow by more than two orders of magnitude in a thousand years, reaching non-linear amplitudes within the envelope lifetime. If the magnetic pressure in the envelope exceeds the gas pressure, the instability develops into trains of propagating shocks. Radiation escapes readily through the low-density material between the shocks, enabling accretion to continue despite the Eddington limit imposed by the dust opacity. The supersonic motions arising from the photon bubble instability can help explain the large velocity dispersions of hot molecular cores, while conditions in the shocked gas are suitable for maser emission. We conclude that the photon bubble instability may play a key role in the formation of massive stars.
description: Accepted by the Astrophysical Journal; 18 pages, 4 figures
$f$-electron and magnetic ordering effects in nickelates LaNiO$_2$ and NdNiO$_2$: remarkable role of the cuprate-like $3d_{x^2-y^2}$ band
Creators: name: Zhang, Ruiqi
name: Lane, Christopher
name: Singh, Bahadur
name: Nokelainen, Johannes
name: Barbiellini, Bernardo
name: Markiewicz, Robert S.
name: Bansil, Arun
name: Sun, Jianwei
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Recent discovery of superconductivity in the doped infinite-layer nickelates has renewed interest in understanding the nature of high-temperature superconductivity more generally. The low-energy electronic structure of the parent compound NdNiO$_{2}$, the role of electronic correlations in driving superconductivity, and the possible relationship betweeen the cuprates and the nickelates are still open questions. Here, by comparing LaNiO$_2$ and NdNiO$_2$ systematically within a parameter-free density functional framework, all-electron first-principles framework, we reveal the role Nd 4$f$ electrons in shaping the ground state of pristine NdNiO$_2$. Strong similarities are found between the electronic structures of LaNiO$_2$ and NdNiO$_2$, except for the effects of the 4$f$-electrons. Hybridization between the Nd 4$f$ and Ni 3$d$ orbitals is shown to significantly modify the Fermi surfaces of various magnetic states. In contrast, the competition between the magnetically ordered phases depends mainly on the gaps in the Ni $d_{x2-y2}$ band, so that the ground state in LaNiO$_2$ and NdNiO$_2$ turns out to be striking similarity to that of the cuprates. The $d-p$ band-splitting is found to be much larger while the intralayer 3$d$ ion-exchange coupling is smaller in the nickelates compared to the cuprates. Our estimated value of the on-site Hubbard $U$ is similar to that in the cuprates, but the value of the Hund's coupling $J_H$ is found to be sensitive to the Nd magnetic moment. The exchange coupling $J$ in NdNiO$_2$ is only half as large as in the curpates, which may explain why $T_c$ in the nickelates is half as large as the cuprates.
description: 10 pages, 8 figures
Critical Branching Regenerative Processes with Migration
Creators: name: Yanev, George P.
name: Mitov, Kosto V.
name: Yanev, Nickolay M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K05, 60J80

description: This paper demonstrates a new regeneration processes technology making use of positive stable distributions. We study the asymptotic behavior of branching processes with a randomly controlled migration component. Using the new method, we confirm some known results and establish new limit theorems that hold in a more general setting.
Gibbs Point Process Model for Young Star Clusters in M33
Creators: name: Li, Dayi
name: Barmby, Pauline
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We demonstrate the power of Gibbs point process models from the spatial statistics literature when applied to studies of resolved galaxies. We conduct a rigorous analysis of the spatial distributions of objects in the star formation complexes of M33, including giant molecular clouds (GMCs) and young stellar cluster candidates (YSCCs). We choose a hierarchical model structure from GMCs to YSCCs based on the natural formation hierarchy between them. This approach circumvents the limitations of the empirical two-point correlation function analysis by naturally accounting for the inhomogeneity present in the distribution of YSCCs. We also investigate the effects of GMCs' properties on their spatial distributions. We confirm that the distribution of GMCs and YSCCs are highly correlated. We found that the spatial distributions of YSCCs reaches a peak of clustering pattern at ~250 pc scale compared to a Poisson process. This clustering mainly occurs in regions where the galactocentric distance >~4.5 kpc. Furthermore, the galactocentric distance of GMCs and their mass have strong positive effects on the correlation strength between GMCs and YSCCs. We outline some possible implications of these findings for our understanding of the cluster formation process.
description: MNRAS in press; 22 pages
Country Image in COVID-19 Pandemic: A Case Study of China
Creators: name: Chen, Huimin
name: Zhu, Zeyu
name: Qi, Fanchao
name: Ye, Yining
name: Liu, Zhiyuan
name: Sun, Maosong
name: Jin, Jianbin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Computation and Language (cs.CL)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Country image has a profound influence on international relations and economic development. In the worldwide outbreak of COVID-19, countries and their people display different reactions, resulting in diverse perceived images among foreign public. Therefore, in this study, we take China as a specific and typical case and investigate its image with aspect-based sentiment analysis on a large-scale Twitter dataset. To our knowledge, this is the first study to explore country image in such a fine-grained way. To perform the analysis, we first build a manually-labeled Twitter dataset with aspect-level sentiment annotations. Afterward, we conduct the aspect-based sentiment analysis with BERT to explore the image of China. We discover an overall sentiment change from non-negative to negative in the general public, and explain it with the increasing mentions of negative ideology-related aspects and decreasing mentions of non-negative fact-based aspects. Further investigations into different groups of Twitter users, including U.S. Congress members, English media, and social bots, reveal different patterns in their attitudes toward China. This study provides a deeper understanding of the changing image of China in COVID-19 pandemic. Our research also demonstrates how aspect-based sentiment analysis can be applied in social science researches to deliver valuable insights.
Zeroes of holomorphic functions with almost--periodic modulus
Creators: name: Favorov, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 42A75 (Primary), 32A60, 32A18(Secondary)

description: We give necessary and sufficient conditions for a divisor in a tube domain to be the divisor of a holomorphic function with almost--periodic modulus.
Defending the Assurance View of Testimonial Justification
Creators: name: Hurwitz, Michael Joel
Publisher: name: University of Illinois at Chicago
Year: 2020
Subjects: Uncategorized

description: What makes you justified in believing what people say or tell you? Until recently, theorists agreed that the answer to this question, whatever it is, does not in principle depend on whether you are addressed by the speaker or you merely overhear her tell something to someone else. The Assurance View of testimonial justification challenges that consensus. According to the Assurance View, in common situations of testimony you gain a distinct form of justification, the assurance justification, that derives from a distinct interaction, the assurance interaction, which requires a distinct form of trust, assurance trust, appropriate only to addressees. In this dissertation I defend the Assurance View by proposing a new version of it based on the idea that assurance trust detects for the speaker’s sincerity in the assurance interaction. This Detection View, I argue, can overcome the main objections to the Assurance View without departing, as some versions do, from assumptions about epistemic justification embraced in mainstream epistemology.
A Feasible Approach for Automatically Differentiable Unitary Coupled-Cluster on Quantum Computers
Creators: name: Kottmann, Jakob S.
name: Anand, Abhinav
name: Aspuru-Guzik, Alán
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We develop computationally affordable and encoding independent gradient evaluation procedures for unitary coupled-cluster type operators, applicable on quantum computers. We show that, within our framework, the gradient of an expectation value with respect to a parameterized n-fold fermionic excitation can be evaluated by four expectation values of similar form and size, whereas most standard approaches based on the direct application of the parameter-shift-rule come with an associated cost of O(2^(2n)) expectation values. For real wavefunctions, this cost can be further reduced to two expectation values. Our strategies are implemented within the open-source package tequila and allow blackboard style construction of differentiable objective functions. We illustrate initial applications for electronic ground and excited states.
Spaces of holomorphic almost periodic functions on a strip
Creators: name: Favorov, S.
name: Udodova, O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 42A75(Primary), 30B50(Secondary)

description: The notions of almost periodicity in the sense of Weyl and Besicovitch of the order p are extended to holomorphic functions on a strip. We prove that the spaces of holomorphic almost periodic functions in the sense of Weyl for various orders p are the same. These spaces are considerably wider than the space of holomorphic uniformly almost periodic functions and considerably narrower than the spaces of holomorphic almost periodic functions in the sense of Besicovitch. Besides we construct examples showing that the spaces of holomorphic almost periodic functions in the sense of Besicovitch for various orders p are all different.
Mass segregation and sequential star formation in NGC 2264 revealed by Herschel
Creators: name: Nony, T.
name: Robitaille, J. -F.
name: Motte, F.
name: Gonzalez, M.
name: Joncour, I.
name: Moraux, E.
name: Men'shchikov, A.
name: Didelon, P.
name: Louvet, F.
name: Buckner, A. S. M.
name: Schneider, N.
name: Lumsden, S. L.
name: Bontemps, S.
name: Pouteau, Y.
name: Cunningham, N.
name: Fiorellino, E.
name: Oudmaijer, R.
name: André, P.
name: Thomasson, B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The mass segregation of stellar clusters could be primordial rather than dynamical. Despite the abundance of studies of mass segregation for stellar clusters, those for stellar progenitors are still scarce, so the question on the origin and evolution of mass segregation is still open. Our goal is to characterize the structure of the NGC 2264 molecular cloud and compare the populations of clumps and young stellar objects (YSOs) in this region whose rich YSO population has shown evidence of sequential star formation. We separated the Herschel column density map of NGC 2264 in three subregions and compared their cloud power spectra using a multiscale segmentation technique. We identified in the whole NGC 2264 cloud a population of 256 clumps with typical sizes of ~0.1 pc and masses ranging from 0.08 Msun to 53 Msun. Although clumps have been detected all over the cloud, the central subregion of NGC 2264 concentrates most of the massive, bound clumps. The local surface density and the mass segregation ratio indeed indicate a strong degree of mass segregation for the 15 most massive clumps, with a median $Σ_6$ three time that of the whole clumps population and $Λ_{MSR}$ about 8. We showed that this cluster of massive clumps is forming within a high-density cloud ridge, itself formed and probably still fed by the high concentration of gas observed on larger scales in the central subregion. The time sequence obtained from the combined study of the clump and YSO populations in NGC 2264 suggests that the star formation started in the northern subregion, that it is now actively developing at the center and will soon start in the southern subregion. Taken together, the cloud structure and the clump and YSO populations in NGC 2264 argue for a dynamical scenario of star formation.
description: 26 pages, 19 figures. Accepted for publication in A&A, abstract abridged for arXiv
INTEGRAL observations of the blazar 3C454.3 in outburst
Creators: name: Pian, Elena
name: Foschini, Luigi
name: Beckmann, Volker
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In Spring 2005, the blazar 3C454.3 underwent a dramatic outburst at all wavelengths from mm to X-rays. This prompted INTEGRAL observations, accomplished in 15-18 May 2005. The source was detected by the INTEGRAL instruments from 3 to 200 keV in a bright state (~5 x 10E-10 cgs), at least a factor of 2-3 higher than previously observed. This is one of the brightest blazar detections achieved by INTEGRAL. During the 2.5 days of INTEGRAL monitoring, we detected a ~20% decrease in the hard X-rays (20-40 keV), indicating that we have sampled the decaying part of the flare. The decrease is less apparent in the soft X-rays (5-15 keV). The simultaneous optical variations are weakly correlated with those at soft X-rays, and not clearly correlated with those at hard X-rays. The spectral energy distribution exhibits two components, as typically seen in blazars, which can be modeled with synchrotron radiation and inverse Compton scattering occurring in a region external to the broad line region.
description: 5 pages, 3 eps figures, in press in A&A Letters
Direct Ink Writing of Polymer Batteries
Creators: name: Cheng, Meng
Publisher: name: University of Illinois at Chicago
Year: 2021
Subjects: Uncategorized

description: In the recent year, the fabrication of rechargeable batteries via three-dimensional (3D) printing has drawn considerable interest due to the advanced performances that arise from 3D design of rechargeable battery architectures as compared to the conventionally fabricated ones. However, challenges with the 3D printing of electrolytes for rechargeable batteries still remain. Additional processing steps such as solvent evaporation were required for earlier studies of electrolyte fabrication, which hindered the simultaneous production of electrode and electrolyte in an all-3D-printed battery. We demonstrate a novel method to fabricate hybrid solid-state electrolytes using an elevated-temperature direct ink writing technique without any additional processing steps. The hybrid solid-state electrolyte consists of solid Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) matrices and a Li+ conducting ionic liquid electrolyte. The ink was modified by adding nano-sized ceramic fillers to achieve the desired rheological properties. Interestingly, a continuous, thin, and dense layer was discovered to form between the porous electrolyte layer and the electrode, which effectively reduced the interfacial resistance of the solid-state battery. Compared to the traditional methods of solid-state battery assembly, our directly printed electrolyte helps to achieve higher capacities and a better rate performance. The direct fabrication of electrolyte from printable inks at an elevated temperature will shed new light on design of all-3D-printed batteries for next-generation electronic devices. Proper distribution of thermally-conductive nanomaterials in polymer batteries offers new opportunities to mitigate performance degradations associated with local hot spots and battery safety concerns. We utilized direct ink writing (DIW) method to fabricate solvent-free polyethylene oxide (PEO) composite polymers electrolytes (CPE) embedded with silane-treated hexagonal boron nitride (S-hBN) platelets. It was observed that the S-hBN platelets were well aligned in the printed CPE during the DIW process. The in-plane thermal conductivity of the printed CPE with the aligned S-hBN platelets is higher than the pristine CPE with the randomly dispersed S-hBN platelets. Thermal imaging showed that the peak temperature of the printed electrolytes is lower than that of the CPE without S-hBN and the CPE with the randomly dispersed S-hBN, indicating a better thermal transport property. Lithium-ion half-cells made with this printed CPE and LiFePO4 cathode displayed high specific discharge capacity and stable Coulombic efficiency at room temperature. This work facilitates the development of thermally-conductive solid-state batteries enabled by printing techniques.
The algebra of invariants of 3x3 matrices over a field of arbitrary characteristic
Creators: name: Lopatin, A. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 13A50; 15A72; 16R10; 16R30

description: The least upper bound on degrees of elements of a minimal system of generators of the algebra of invariants of 3x3 matrices is found, and the nilpotency degree of a relatively free finitely generated algebra with the identity x^3=0 is established.
Genetic diversity and origin of two Queen Charlotte Islands plants: Senecio newcombei and Saxifraga taylori
Creators: name: Goertzen, Leslie R.
Publisher: name: University of British Columbia
Year: 2009

description: Questions concerning the history and origins of two vascular plants endemic to the Queen Charlotte Islands, Senecio newcombei and Saxifraga taylori, are examined from a biosystematic and population genetics standpoint. Both species maintain levels of genetic variation lower than would be expected from their breeding system and geographic range. Historical factors such as population bottlenecks and founder events may have contributed to the genetic profiles of these species, a suggestion consistent with their hypothesized survival in Pleistocene glacial refugia. The allozyme variability of a third species, Saxifraga vespertina, was assessed to compare its genetic complement to S. taylori. Although complicated by an overall lack of variation, a low estimation (0.224) of Nei's genetic identity does not support the hypothesis of a historically recent divergence of the two species. ii
Greedy coordinate descent method on non-negative quadratic programming
Creators: name: Wu, Chenyu
name: Xu, Yangyang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: The coordinate descent (CD) method has recently become popular for solving very large-scale problems, partly due to its simple update, low memory requirement, and fast convergence. In this paper, we explore the greedy CD on solving non-negative quadratic programming (NQP). The greedy CD generally has much more expensive per-update complexity than its cyclic and randomized counterparts. However, on the NQP, these three CDs have almost the same per-update cost, while the greedy CD can have significantly faster overall convergence speed. We also apply the proposed greedy CD as a subroutine to solve linearly constrained NQP and the non-negative matrix factorization. Promising numerical results on both problems are observed on instances with synthetic data and also image data.
Deciphering the properties of hot and dense matter with hadron-hadron correlations
Creators: name: Majumder, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Two classes of jet correlations in hot and dense matter are explored. Correlations between very high transverse momentum hadrons within a jet sample the gluon density of the medium, where, the minimal modification on the same side as the trigger is consistent with the picture and parameters of partonic energy loss. Lower momentum partons, sampled through softer correlations, due to their larger wavelengths are sensitive to the presence of composite structures in the medium. Scattering off such states may modify the dispersion relation of the radiated gluons resulting in conical patterns in the detected correlations.
description: 8 pages, 5 figures, Latex, To appear in the proceedings of the International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, June 9-16, 2006, Pacific Grove, California
The importance of international business to the strategic agenda of U.S. CEOs
Creators: name: Hoffman, Richard C.
name: Gopinath, C.
Publisher: name: Maryland Shared Open Access Repository
Year: 1994
Subjects: International Business
American CEOs

description: The growth of international business (IB) and concerns about the relevance of IB research indicate the need for managerial input on the topic. A survey of 108 U.S. CEOs reveals that IB issues are an important part of their strategic agenda. Four types of IB issues are identified which reveal that American CEOs appear to be taking a proactive stance regarding the international arena. The CEOs were also found to hold diverse perceptions of IB issues. The implications of these findings are discussed.
Simultaneous ambient pressure X-ray photoelectron spectroscopy and grazing incidence X-ray scattering in gas environments
Creators: name: Kersell, H.
name: Chen, P.
name: Martins, H.
name: Lu, Q.
name: Brausse, F.
name: Liu, B. -H.
name: Blum, M.
name: Roy, S.
name: Rude, B.
name: Kilcoyne, A.
name: Bluhm, H.
name: Nemšák, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We have developed an experimental system to simultaneously observe surface structure, morphology, composition, chemical state, and chemical activity for samples in gas phase environments. This is accomplished by simultaneously measuring X-ray photoelectron spectroscopy (XPS) and grazing incidence X-ray scattering (GIXS) in gas pressures as high as the multi-Torr regime, while also recording mass spectrometry. Scattering patterns reflect near-surface sample structures from the nano- to the meso-scale. The grazing incidence geometry provides tunable depth sensitivity while scattered X-rays are detected across a broad range of angles using a newly designed pivoting-UHV-manipulator for detector positioning. At the same time, XPS and mass spectrometry can be measured, all from the same sample spot and in ambient conditions. To demonstrate the capabilities of this system, we measured the chemical state, composition, and structure of Ag-behenate on a Si(001) wafer in vacuum and in O$_2$ atmosphere at various temperatures. These simultaneous structural, chemical, and gas phase product probes enable detailed insights into the interplay between structure and chemical state for samples in gas phase environments. The compact size of our pivoting-UHV-manipulator makes it possible to retrofit this technique into existing spectroscopic instruments installed at synchrotron beamlines. Because many synchrotron facilities are planning or undergoing upgrades to diffraction limited storage rings with transversely coherent beams, a newly emerging set of coherent X-ray scattering experiments can greatly benefit from the concepts we present here.
description: 21 pages, 4 figures
Direct Ink Writing of Polymer Batteries
Creators: name: Cheng, Meng
Publisher: name: University of Illinois at Chicago
Year: 2020
Subjects: Uncategorized

description: In the recent year, the fabrication of rechargeable batteries via three-dimensional (3D) printing has drawn considerable interest due to the advanced performances that arise from 3D design of rechargeable battery architectures as compared to the conventionally fabricated ones. However, challenges with the 3D printing of electrolytes for rechargeable batteries still remain. Additional processing steps such as solvent evaporation were required for earlier studies of electrolyte fabrication, which hindered the simultaneous production of electrode and electrolyte in an all-3D-printed battery. We demonstrate a novel method to fabricate hybrid solid-state electrolytes using an elevated-temperature direct ink writing technique without any additional processing steps. The hybrid solid-state electrolyte consists of solid Poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) matrices and a Li+ conducting ionic liquid electrolyte. The ink was modified by adding nano-sized ceramic fillers to achieve the desired rheological properties. Interestingly, a continuous, thin, and dense layer was discovered to form between the porous electrolyte layer and the electrode, which effectively reduced the interfacial resistance of the solid-state battery. Compared to the traditional methods of solid-state battery assembly, our directly printed electrolyte helps to achieve higher capacities and a better rate performance. The direct fabrication of electrolyte from printable inks at an elevated temperature will shed new light on design of all-3D-printed batteries for next-generation electronic devices. Proper distribution of thermally-conductive nanomaterials in polymer batteries offers new opportunities to mitigate performance degradations associated with local hot spots and battery safety concerns. We utilized direct ink writing (DIW) method to fabricate solvent-free polyethylene oxide (PEO) composite polymers electrolytes (CPE) embedded with silane-treated hexagonal boron nitride (S-hBN) platelets. It was observed that the S-hBN platelets were well aligned in the printed CPE during the DIW process. The in-plane thermal conductivity of the printed CPE with the aligned S-hBN platelets is higher than the pristine CPE with the randomly dispersed S-hBN platelets. Thermal imaging showed that the peak temperature of the printed electrolytes is lower than that of the CPE without S-hBN and the CPE with the randomly dispersed S-hBN, indicating a better thermal transport property. Lithium-ion half-cells made with this printed CPE and LiFePO4 cathode displayed high specific discharge capacity and stable Coulombic efficiency at room temperature. This work facilitates the development of thermally-conductive solid-state batteries enabled by printing techniques.
Ultracold dense gas of deeply bound heteronuclear molecules
Creators: name: Ospelkaus, S.
name: Pe'er, A.
name: Ni, K. -K.
name: Zirbel, J. J.
name: Neyenhuis, B.
name: Kotochigova, S.
name: Julienne, P. S.
name: Ye, J.
name: Jin, D. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Recently, the quest for an ultracold and dense ensemble of polar molecules has attracted strong interest. Polar molecules have bright prospects for novel quantum gases with long-range and anisotropic interactions, for quantum information science, and for precision measurements. However, high-density clouds of ultracold polar molecules have so far not been produced. Here, we report a key step towards this goal. Starting from an ultracold dense gas of heteronuclear 40K-87Rb Feshbach molecules with typical binding energies of a few hundred kHz and a negligible dipole moment, we coherently transfer these molecules into a vibrational level of the ground-state molecular potential bound by >10 GHz. We thereby increase the binding energy and the expected dipole moment of the 40K-87Rb molecules by more than four orders of magnitude in a single transfer step. Starting with a single initial state prepared with Feshbach association, we achieve a transfer efficiency of 84%. While dipolar effects are not yet observable, the presented technique can be extended to access much more deeply bound vibrational levels and ultimately those exhibiting a significant dipole moment. The preparation of an ultracold quantum gas of polar molecules might therefore come within experimental reach.
description: 5 pages, 5 figures
MPEC 2024-A27 : 2023 YC2
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: 2023 YC2

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.
Subharmonic Almost Periodic Functions of Slow Growth
Creators: name: Favorov, S.
name: Rakhnin, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 31A05(Primary), 42A75, 30D15 (Secondary)

description: We obtain a complete description of the Riesz measures of almost periodic subharmonic functions with at most of linear growth on the complex plane; as a consequence we get a complete description of zero sets for the class of entire functions of exponential type with almost periodic modulus.
A search for He I airglow emission from the hot Jupiter tau Boo b
Creators: name: Zhang, Yapeng
name: Snellen, I. A. G.
name: Mollière, P.
name: Alonso-Floriano, F. J.
name: Webb, R. K.
name: Brogi, M.
name: Wyttenbach, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The helium absorption line at 10830 Å, originating from the metastable triplet state 2$^3$S, has been suggested as an excellent probe for the extended atmospheres of hot Jupiters and their hydrodynamic escape processes, and has recently been detected in the transmission spectra of a handful of planets. The isotropic re-emission will lead to helium airglow that may be observable at other orbital phases. The goal of this paper is to investigate the detectability of He I emission at 10830 Å in the atmospheres of exoplanets using high-resolution spectroscopy, providing insights into the properties of the upper atmospheres of close-in gas giants. We estimated the expected strength of He I emission in hot Jupiters based on their transmission signal. We searched for the He I 10830 Å emission feature in tau Boo b in three nights of high-resolution spectra taken by CARMENES at the 3.5m Calar Alto telescope. The spectra from each night were corrected for telluric absorption, sky emission lines, and stellar features, and were shifted to the planetary rest frame to search for the emission. The He I emission is not detected in tau Boo b, reaching a 5 sigma contrast limit of 4$\times$10$^{-4}$ for emission line widths above 20 km/s. This is roughly a factor of 8 above the expected level of emission (assuming a typical He I transit absorption of 1% for hot Jupiters). This suggests that targeting the He I emission with well-designed observations using upcoming instruments such as VLT/CRIRES+ and E-ELT/HIRES is possible.
description: Accepted for publication in A&A; 9 pages, 9 figures
Deep Learning for Smartphone Security and Privacy
Creators: name: Sarasadat Amini
Publisher: name: University of Illinois at Chicago
Year: 2020
Subjects: Uncategorized

description: Due to the growing popularity of smartphones with more than 3.5 billion users all around the world, their built-in sensors data has been excessively exploited in various fields of research including security and privacy. User identification and continuous user authentication are two representatives of challenging mobile sensing problems in security and privacy research areas. Based on the user's distinguishable behavioral patterns inferred from sensors data, continuous user authentication aims to verify whether the current user is the actual legitimate user or not, whereas in the user identification problem the goal is to identify the current user of the mobile device correctly among all users. Since deep learning algorithms have great potential for discriminative learning tasks, we utilize them to develop deep models advancing the current smartphone user authentication and user identification systems. First, we present DeepAuth as a generic framework for re-authenticating users in a mobile app that leverages sensors data and deep learning techniques to enable a frictionless and secure user experience in the application. Existing machine learning techniques for user identification are classification-oriented and thus are not amenable easily to large-scale, real-world deployment. In the second task, we present DeepFP that exploits metric learning techniques to address the challenges of current user identification techniques. In the last work, we investigate the possibility of transferring knowledge from a pre-trained user identification model on a source domain to a target domain.
Spatial averages for the Parabolic Anderson model driven by rough noise
Creators: name: Nualart, David
name: Song, Xiaoming
name: Zheng, Guangqu
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H15, 60H07, 60G15, 60F05

description: In this paper, we study spatial averages for the parabolic Anderson model in the Skorohod sense driven by rough Gaussian noise, which is colored in space and time. We include the case of a fractional noise with Hurst parameters $H_0$ in time and $H_1$ in space, satisfying $H_0 \in (1/2,1)$, $H_1\in (0,1/2)$ and $H_0 + H_1 > 3/4$. Our main result is a functional central limit theorem for the spatial averages. As an important ingredient of our analysis, we present a Feynman-Kac formula that is new for these values of the Hurst parameters.