cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Semaphorin 3c (SEMA3C) as a potential therapeutic target in breast cancer
Creators: name: Bhasin, Satyam
Publisher: name: University of British Columbia
Year: 2024

description: Breast cancer (BCa) is a significant cause of cancer-related deaths among females globally. Approximately 45% of BCa patients develop treatment resistance or suffer from a lack of targeted therapies. Previously, we have shown that Semaphorin 3C (SEMA3C) is an autocrine growth factor that drives the growth and treatment resistance of various cancers. This study aims to investigate the functional role of SEMA3C in breast cancer progression and treatment resistance. My analysis of clinical datasets revealed elevated levels of SEMA3C mRNA in breast tumors compared to normal adjacent tissue. SEMA3C expression was positively correlated with the expression of various oncogenes implicated in breast cancer. Both estrogen receptor (ER) positive (ER⁺/HER2ˉ) BCa and triple negative breast cancer (TNBC) cells exhibited higher levels of SEMA3C protein compared to a non-cancer mammary epithelial cell line (MCF10A). Stimulation with recombinant SEMA3C activated EGFR, MAPK and AKT signaling in both ER⁺ and TNBC cells. Conversely, SEMA3C silencing inhibited ER expression, EGFR, MAPK, and AKT signaling, while inducing apoptosis. Silencing of SEMA3C significantly suppressed the growth of ER⁺ BCa and TNBC cells, indicating a growth dependency on SEMA3C. Tamoxifen-resistant cells (TamC3, TamR3) remained reliant on SEMA3C for growth and survival, suggesting its persistence in treatment resistance. Additionally, SEMA3C suppression enhanced the efficacy of certain chemotherapies and targeted therapies in TNBC cells. Additionally, treatment with SEMA3C pathway inhibitors, B1SP (Fc fusion protein) and ALS, attenuated SEMA3C-induced signaling and growth in both ER⁺ and TNBC cells. This study highlights the functional role of SEMA3C in breast cancer signaling and growth, suggesting its potential as a therapeutic target. Targeting SEMA3C may offer benefits in improving treatment outcomes for breast cancer patients, particularly in cases of endocrine treatment resistance and TNBC.
Endoscopic character identities for depth-zero supercuspidal L-packets
Creators: name: Kaletha, Tasho
Publisher: name: arXiv
Year: 2009
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E50

description: We prove the conjectural endoscopic transfer of L-packets for the local Langlands correspondence for pure inner forms of unramified p-adic groups and depth-zero parameters established by DeBacker and Reeder. More precisely, we show that under mild conditions on the residual characteristic, endoscopic induction identifies an unstable character of such an L-packet with the stable character of the corresponding endoscopic L-packet.
description: 42 pages
Detection of the phase shift from a single quantized superconducting vortex
Creators: name: Golod, Taras
name: Rydh, Andreas
name: Krasnov, Vladimir M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: An Abrikosov vortex in a superconductor carries a flux quantum, Phi_0 = hc/2e, localized at its center, but induces a global 2pi phase rotation in the superconducting condensate. This long-range gauge field outside the area pierced by a magnetic field is due to the Aharonov-Bohm effect, which is a non-classical phenomenon that illustrates the significance of potentials rather than forces in quantum mechanics. In the London gauge, the phase of the condensate is given by the polar angle around the vortex. Here we raise the question whether this phase shift could be detected by means of Cooper pair interferometry using Josephson junctions as phase-sensitive detectors. We introduce a single Abrikosov vortex into a superconducting lead with a detector junction made at the edge of the lead. We observe that the vortex induces a Josephson phase shift equal to the polar angle of the vortex within the junction length. When the vortex is close to the junction it induces a pi-step in the Josephson phase difference, leading to a controllable and reversible switching of the junction into the 0 - pi state. This in turn results in an unusual Phi_0/2 quantization of the flux in the junction. The vortex may hence act as a tunable "phase battery" for quantum electronics.
description: 9 pages, 6 figures; Fig. 1c corrected; Paragraphs 2 and 3 on page 3 interchanged; Ref. 3 to main manuscript corrected.
The impact of TP-AGB stars on hierarchical galaxy formation models
Creators: name: Tonini, Chiara
name: Maraston, Claudia
name: Devriendt, Julien
name: Thomas, Daniel
name: Silk, Joseph
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The spectro-photometric properties of galaxies in galaxy formation models are obtained by combining the predicted history of star formation and mass accretion with the physics of stellar evolution through stellar population models. In the recent literature, significant differences have emerged regarding the implementation of the Thermally-Pulsing Asymptotic Giant Branch phase of stellar evolution. The emission in the TP-AGB phase dominates the bolometric and near-IR spectrum of intermediate-age (~1 Gyr) stellar populations, hence it is crucial for the correct modeling of the galaxy luminosities and colours. In this paper for the first time, we incorporate a full prescription of the TP-AGB phase in a semi-analytic model of galaxy formation. We find that the inclusion of the TP-AGB in the model spectra dramatically alters the predicted colour-magnitude relation and its evolution with redshift. When the TP-AGB phase is active, the rest-frame V-K galaxy colours are redder by almost 2 magnitudes in the redshift range z~2-3 and by 1 magnitude at z~1. Very red colours are produced in disk galaxies, so that the V-K colour distributions of disk and spheroids are virtually undistinguishable at low redshifts. We also find that the galaxy K-band emission is more than 1 magnitude higher in the range z~1-3. This may alleviate the difficulties met by the hierarchical clustering scenario in predicting the red galaxy population at high redshifts. The comparison between simulations and observations have to be revisited in the light of our results.
description: 6 pages, 4 figures. Accepted for publication on MNRAS Letters
Hidden Kondo lattice physics in single-orbital Hubbard models
Creators: name: Werner, Philipp
name: Ghorashi, Sayed Ali Akbar
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Single-orbital Hubbard models exhibit remarkably nontrivial correlation phenomena, even on nonfrustrated bipartite lattices. Some of these, like non-Fermi-liquid metal states, or the coexistence of heavy and light quasi-particles, are reminiscent of the properties of more complex multi-orbital or Kondo-lattice systems. Here, we use basis transformations to map single-orbital models to effective multi-orbital descriptions and clarify how a ferromagnetic Kondo-lattice-like behavior emerges in prototypical models with flat bands or van Hove singularities in the density of states: the Hubbard model on the diamond chain, square-lattice, Lieb lattice and honeycomb lattice. In particular, this mapping explains the non-Fermi-liquid states and pseudo-gaps found in the correlated metal regime.
Stochastic particle acceleration in the lobes of giant radio galaxies
Creators: name: O'Sullivan, S.
name: Reville, B.
name: Taylor, A. M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the acceleration of particles via the second-order Fermi process in the lobes of giant radio galaxies. Such sites are candidates for the accelerators of ultra-high energy cosmic rays. We focus on the nearby FR I radio galaxy Centaurus A. This is motivated by the coincidence of its position with the arrival direction of several of the highest energy Auger events. The conditions necessary for consistency with the acceleration timescales predicted by quasi-linear theory are reviewed. Test particle calculations are performed in fields which guarantee electric fields with no component parallel to the local magnetic field. The results of quasilinear theory are, to order of magnitude, found to be accurate at low turbulence levels for non-relativistic Alfven waves and at both low and high turbulence levels in the mildly relativistic case. We conclude that for pure stochastic acceleration to be plausible as the generator of ultra-high energy cosmic rays in Centaurus A, the baryon number density would need to be several orders of magnitude below currently held upper-limits.
description: accepted to Mon. Not. R. Astron. Soc., 11 pages, 6 figures
Additional file 1: of Identification of a novel GNAS mutation in a case of pseudohypoparathyroidism type 1A with normocalcemia
Creators: name: Long, Xiao-dan
name: Xiong, Jing
name: Mo, Zhao-hui
name: Dong, Chang-sheng
name: Jin, Ping
Publisher: name: figshare
Year: 2018
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: Table S1. PCR and sequencing primers of GNAS gene. (DOCX 14 kb)
The Maximal Gravitational Wave Signal from Asteroid-Mass Primordial Black Hole Mergers At Resonant Microwave Cavities
Creators: name: Profumo, Stefano
name: Brown, Lucas
name: Ewasiuk, Christopher
name: Ricarte, Sean
name: Su, Henry
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Primordial black holes can be the entirety of the dark matter in a broad, approximately five-orders-of-magnitude-wide mass range, the ``asteroid mass range'', between $10^{-16}\ M_{\rm Sun}$ -- where constraints originate from evaporation -- and $10^{-11}\ M_{\rm Sun}$ -- from microlensing. A direct detection in this mass range is very challenging with any known observational or experimental methods. Here we update the calculation of the sight distance for narrow-band detectors such as resonant microwave cavities, and the resulting maximal event rate. We find that the largest detection rates are associated with binaries from non-monochromatic mass functions in early-formed three-body systems. Even in the most optimistic setup, these events are anticipated to be extremely rare.
description: 29 pages, 9 figures; significantly revised version, accepted for publication, to appear in Phys.Rev.D
Multiscale Modeling of Coarse-Grained Macromolecular Liquids
Creators: name: McCarty, J.
name: Lyubimov, I. Y.
name: Guenza, M. G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: A first-principle multiscale modeling approach is presented, which is derived from the solution of the Ornstein-Zernike equation for the coarse-grained representation of polymer liquids. The approach is analytical, and for this reason is transferable. It is here applied to determine the structure of several polymeric systems, which have different parameter values, such as molecular length, monomeric structure, local flexibility, and thermodynamic conditions. When the pair distribution function obtained from this procedure is compared with the results from a full atomistic simulation, it shows quantitative agreement. Moreover, the multiscale procedure accurately captures both large and local scale properties while remaining computationally advantageous.
The QCD static energy at NNNLL
Creators: name: Brambilla, Nora
name: Tormo, Xavier Garcia i
name: Soto, Joan
name: Vairo, Antonio
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We compute the static energy of QCD at short distances at next-to-next-to-next-to leading-logarithmic accuracy in terms of the three-loop singlet potential. By comparing our results with lattice data we extract the value of the unknown piece of the three-loop singlet potential.
description: 25 pages, 16 figures. v2: Incorrect files for figure 7 replaced by the correct ones. One reference added
Effect of chemical substitution and pressure on YbRh2Si2
Creators: name: Nicklas, M.
name: Macovei, M. E.
name: Ferstl, J.
name: Krellner, C.
name: Geibel, C.
name: Steglich, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We carried out electrical resistivity experiments on (Yb,La)Rh2Si2 and on Yb(Rh,Ir)2Si2 under pressure and in magnetic fields. YbRh2Si2 exhibits a weak antiferromagnetic transition at atmospheric pressure with a Néel temperature of only T_N = 70 mK. By applying a small magnetic field T_N can be continuously suppressed to T=0 at B_c = 60 mT (B_|_c) driving the system to a quantum critical point (QCP). On applying external pressure the magnetic phase is stabilized and T_N(p) is increasing as usually observed in Yb-based heavy-fermion metals. Substituting Yb by La or Rh by Ir allows to create a negative chemical pressure, La (Ir) being smaller than Yb (Rh), and eventually to drive YbRh2Si2 to a pressure controlled QCP. In this paper we compare the effect of external hydrostatic pressure and chemical substitution on the ground-state properties of YbRh2Si2.
description: 4 pages, 5 figures, proceedings paper of the QCNP09
The Chandra survey of the SMC "Bar": II. Optical counterparts of X-ray sources
Creators: name: Antoniou, Vallia
name: Zezas, Andreas
name: Hatzidimitriou, Despina
name: McDowell, Jonathan C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the most likely optical counterparts of 113 X-ray sources detected in our Chandra survey of the central region of the Small Magellanic Cloud (SMC) based on the OGLE-II and MCPS catalogs. We estimate that the foreground contamination and chance coincidence probability are minimal for the bright optical counterparts (corresponding to OB type stars; 35 in total). We propose here for the first time 13 High-Mass X-ray Binaries (HMXBs), of which 4 are Be/X-ray binaries (Be-XRBs), and we confirm the previous classification of 18 Be-XRBs. We estimate that the new candidate Be-XRBs have an age of 15-85 Myr, consistent with the age of Be stars. We also examine the "overabundance" of Be-XRBs in the SMC fields covered by Chandra, in comparison with the Galaxy. In luminosities down to about 10^{34} erg/s, we find that SMC Be-XRBs are 1.5 times more common when compared to the Milky Way even after taking into account the difference in the formation rates of OB stars. This residual excess can be attributed to the lower metallicity of the SMC. Finally, we find that the mixing of Be-XRBs with other than their natal stellar population is not an issue in our comparisons of Be-XRBs and stellar populations in the SMC. Instead, we find indication for variation of the SMC XRB populations on kiloparsec scales, related to local variations of the formation rate of OB stars and slight variation of their age, which results in different relative numbers of Be stars and therefore XRBs.
description: 94 pages, 10 figures, submitted to ApJ
Bailey Pairs and an Identity of Chern-Li-Stanton-Xue-Yee
Creators: name: Kanade, Shashank
name: Lovejoy, Jeremy
Publisher: name: arXiv
Year: 2024
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 33D15

description: We show how Bailey pairs can be used to give a simple proof of an identity of Chern, Li, Stanton, Xue, and Yee. The same method yields a number of related identities as well as false theta companions.
A measurement of the differential cross section for the reaction $γn \to π^{-} p$ from deuterium
Creators: name: Chen, W.
name: Mibe, T.
name: Dutta, D.
name: Gao, H.
name: Laget, J. M.
name: Mirazita, M.
name: Rossi, P.
name: Stepanyan, S.
name: Strakovsky, I. I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We report a measurement of the differential cross section for the $γn \to π^- p$ process from the CLAS detector at Jefferson Lab in Hall B for photon energies between 1.0 and 3.5 GeV and pion center-of-mass (c.m.) angles ($θ_{c.m.}$) between 50$^\circ$ and 115$^\circ$. We confirm a previous indication of a broad enhancement around a c.m. energy ($\sqrt{s}$) of 2.2 GeV at $θ_{c.m.}=90^\circ$ in the scaled differential cross section, $s^7 {\frac{dσ}{dt}}$. Our data show the angular dependence of this enhancement as the scaling region is approached in the kinematic region from 70$^\circ$ to 105$^\circ$.
description: 6 pages, 3 figures. submitted to PRL
Additional file 2: of Identification of a novel GNAS mutation in a case of pseudohypoparathyroidism type 1A with normocalcemia
Creators: name: Long, Xiao-dan
name: Xiong, Jing
name: Mo, Zhao-hui
name: Dong, Chang-sheng
name: Jin, Ping
Publisher: name: figshare
Year: 2018
Subjects: subject: Biophysics
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Genetics
subject: Molecular Biology
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Virology

description: Figure S1. DNA sequence analysis of the exon 9 of GNAS gene. Figure S1 DNA sequence analysis of the exon 9 of GNAS gene. A The arrow indicates the novel heterozygote carrier mutation c.715Aâ >â G (p.N239D) in the proband. This mutation is also found in her mother, who was diagnosed with PPHP. B The normal sequence of her father. (DOCX 50 kb)
Effect of an Expanding Charged Cloud on two-particle Bose-Einstein Correlations
Creators: name: Mohammed, Hemida H.
name: Csanad, Mate
name: Mohammed, Y.
name: Rashed, N.
name: Kincses, Daniel
name: Mahmoud, M. A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In high-energy physics, quantum statistical correlation measurements are very important for getting a good picture of how a particle-emitting source is structured in space and time, as well as its thermodynamic properties and inner dynamics. It is necessary to take into account the various final state effects since they have the potential to alter the observed femtoscopic correlation functions. Protons are affected mostly by the strong interaction, whereas other charged particles are mostly influenced by the Coulomb interaction. The interaction of the particles under investigation with the fireball or the expanding cloud of the other particles in the final state might also have significant consequences. This may cause the particle's trajectory to shift. This phenomenon can be viewed as an Aharonov-Bohm effect since the pair's alternate tracks reveal a closed loop with an internal field. We investigate a numerical solution for a toy model to study the modifications of Bose-Einstien correlation function strength, which is sensitive to this effect
CoRoT photometry and high-resolution spectroscopy of the interacting eclipsing binary AU Mon
Creators: name: Desmet, M.
name: Fr'emat, Y.
name: Baudin, F.
name: Harmanec, P.
name: Lampens, P.
name: Pacheco, E. Janot
name: Briquet, M.
name: Degroote, P.
name: Neiner, C.
name: Mathias, P.
name: Poretti, E.
name: Rainer, M.
name: Uytterhoeven, K.
name: Amado, P. J.
name: Valtier, J. -C.
name: Prsa, A.
name: Maceroni, C.
name: Aerts, C.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Analyses of very accurate CoRoT space photometry, past Johnson V photoelectric photometry and high-resolution échelle spectra led to the determination of improved and consistent fundamental stellar properties of both components of AU Mon. We derived new, accurate ephemerides for both the orbital motion (with a period of 11.113d) and the long-term, overall brightness variation (with a period of 416.9d) of this strongly interacting Be + G semi-detached binary. It is shown that this long-term variation must be due to attenuation of the total light by some variable circumbinary material. We derived the binary mass ratio $M_{\rm G}/M_{\rm B}$ = 0.17\p0.03 based on the assumption that the G-type secondary fills its Roche lobe and rotates synchronously. Using this value of the mass ratio as well as the radial velocities of the G-star, we obtained a consistent light curve model and improved estimates of the stellar masses, radii, luminosities and effective temperatures. We demonstrate that the observed lines of the B-type primary may not be of photospheric origin. We also discover rapid and periodic light changes visible in the high-quality residual CoRoT light curves. AU Mon is put into perspective by a comparison with known binaries exhibiting long-term cyclic light changes.
description: Accepted for publication in MNRAS
Conformal mapping and shot noise in graphene
Creators: name: Rycerz, Adam
name: Recher, Patrik
name: Wimmer, Michael
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Ballistic transport through a collection of quantum billiards in undoped graphene is studied analytically within the conformal mapping technique. The billiards show pseudodiffusive behavior, with the conductance equal to that of a classical conductor characterized by the conductivity $σ_0=4e^2/πh$, and the Fano factor $F=1/3$. By shrinking at least one of the billiard openings, we observe a tunneling behavior, where the conductance shows a power-law decay with the system size, and the shot noise is Poissonian (F=1). In the crossover region between tunneling and pseudodiffusive regimes, the conductance $G\approx (1-F)\times se^2/h$. The degeneracy $s=8$ for the Corbino disk, which preserves the full symmetry of the Dirac equation, $s=4$ for billiards bounded with smooth edges which break the symplectic symmetry, and $s=2$ when abrupt edges lead to strong intervalley scattering. An alternative, analytical or numerical technique, is utilized for each of the billiards to confirm the applicability of the conformal mapping for various boundary conditions.
description: RevTeX, 16 pages, 15 figures
Chromopolarizability of charm-beauty quarkonium from $B_c(2S) \rightarrow B_cππ$ transition
Creators: name: Chen, Yun-Hua
name: Li, Zi-Wei
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The chromopolarizability of a charm-beauty quarkonium characterizes its interaction with soft gluonic fields and can be probed through heavy quarkonium decays. Using the dispersion theory which considers the $ππ$ final state interaction model-independently, we analyze the transition $B_c(2S) \rightarrow B_cπ^+π^-$ and determine the chromopolarizability $α_{B_c(2S) B_c}=(0.66\pm 0.25)$ GeV$^{-3}$ and the parameter $κ=-0.02\pm 0.13$. Our results indicate that the transitional chromopolarizability of the $c\bar{b}$ state lies between the transitional chromopolarizabilities of the $c\bar{c}$ and $b\bar{b}$ states. These findings provide valuable insights into the interactions of charm-beauty quarkonium with light hadrons.
description: 12 pages, 2 figures; version accepted by Communications in Theoretical Physics
Inverse Spin Thermal Hall Effect in Non-Reciprocal Photonic Systems
Creators: name: Ben-Abdallah, Philippe
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A transverse radiative heat flux induced by the gradient of spin angular momentum of photons in non-reciprocal systems is predicted. This thermal analog of the inverse spin Hall effect is analyzed in magneto-optical networks exhibiting C4 symmetry, under the action of spatially variable external magnetic fields. This finding opens new avenues for thermal management and energy conversion with non-reciprocal systems through a localized and dynamic control of the spin angular momentum of light.
Robust Video Watermarking using Multi-Band Wavelet Transform
Creators: name: Hussein, Jamal
name: Mohammed, Aree
Publisher: name: arXiv
Year: 2009
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: This paper addresses copyright protection as a major security demand in digital marketplaces. Two watermarking techniques are proposed and compared for compressed and uncompressed video with the intention to show the advantages and the possible weaknesses in the schemes working in the frequency domain and in the spatial domain. In this paper a robust video watermarking method is presented. This method embeds data to the specific bands in the wavelet domain using motion estimation approach. The algorithm uses the HL and LH bands to add the watermark where the motion in these bands does not affect the quality of extracted watermark if the video is subjected to different types of malicious attacks. Watermark is embedded in an additive way using random Gaussian distribution in video sequences. The method is tested on different types of video (compressed DVD quality movie and uncompressed digital camera movie). The proposed watermarking method in frequency domain has strong robustness against some attacks such as frame dropping, frame filtering and lossy compression. The experimental results indicate that the similarity measure before and after certain attacks is very close to each other in frequency domain in comparison to the spatial domain.
description: International Journal of Computer Science Issues, IJCSI Volume 6, Issue 1, pp44-49, November 2009
Computational tools for complex electronic auctions
Creators: name: Newman, Neil
Publisher: name: University of British Columbia
Year: 2024

description: This thesis has two main concerns. The first is infrastructure that allows complex, electronic markets to function, ranging from web applications to highly specialized clearing algorithms. The second is developing computational methods to assess alternative market designs. I describe efforts developing and deploying computational infrastructure in support of markets in two very different domains: subsistence agriculture and radio spectrum allocation. I detail practical experiences (a) running a feature-phone based marketplace for agricultural trade built to match farmers with traders in developing countries, and (b) designing a solver to overcome the computational challenge of station repacking in the recent US "incentive" spectrum auction. I then present a series of three computational methods for evaluating alternative market designs, beginning with a setting where plausible models of bidding behavior are known, then relaxing this assumption and studying single-action and later sequential games.
The Milky Way rotation curve in Horava - Lifshitz theory
Creators: name: Cardone, V. F.
name: Radicella, N.
name: Ruggiero, M. L.
name: Capone, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Horava - Lifshitz (HL) theory has recently attracted a lot of interest as a viable solution to some quantum gravity related problems and the presence of an effective cosmological constant able to drive the cosmic speed up. We show here that, in the weak field limit, the HL proposal leads to a modification of the gravitational potential because of two additive terms (scaling respectively as $r^2$ and $r^{-4}$) to the Newtonian $1/r$ potential. We then derive a general expression to compute the rotation curve of an extended system under the assumption that the mass density only depends on the cylindrical coordinates $(R, z)$ showing that the HL modification induces a dependence of the circular velocity on the mass function which is a new feature of the theory. As a first exploratory analysis, we then try fitting the Milky Way rotation curve using its visible components only in order to see whether the HL modified potential can be an alternative to the dark matter framework. This turns out not to be the case so that we argue that dark matter is still needed, but the amount of dark matter and the dark halo density profile have to be revised according to the new HL potential.
description: 10 pages, 1 figure, accepted for publication on MNRAS
Focus Where It Matters: Graph Selective State Focused Attention Networks
Creators: name: Vashistha, Shikhar
name: Kumar, Neetesh
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Traditional graph neural networks (GNNs) lack scalability and lose individual node characteristics due to over-smoothing, especially in the case of deeper networks. This results in sub-optimal feature representation, affecting the model's performance on tasks involving dynamically changing graphs. To address this issue, we present Graph Selective States Focused Attention Networks (GSANs) based neural network architecture for graph-structured data. The GSAN is enabled by multi-head masked self-attention (MHMSA) and selective state space modeling (S3M) layers to overcome the limitations of GNNs. In GSAN, the MHMSA allows GSAN to dynamically emphasize crucial node connections, particularly in evolving graph environments. The S3M layer enables the network to adjust dynamically in changing node states and improving predictions of node behavior in varying contexts without needing primary knowledge of the graph structure. Furthermore, the S3M layer enhances the generalization of unseen structures and interprets how node states influence link importance. With this, GSAN effectively outperforms inductive and transductive tasks and overcomes the issues that traditional GNNs experience. To analyze the performance behavior of GSAN, a set of state-of-the-art comparative experiments are conducted on graphs benchmark datasets, including $Cora$, $Citeseer$, $Pubmed$ network citation, and $protein-protein-interaction$ datasets, as an outcome, GSAN improved the classification accuracy by $1.56\%$, $8.94\%$, $0.37\%$, and $1.54\%$ on $F1-score$ respectively.
Quantum chaos and operator fidelity metric
Creators: name: Giorda, Paolo
name: Zanardi, Paolo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that the recently introduced operator fidelity metric provides a natural tool to investigate the cross-over to quantum chaotic behaviour. This metric is an information-theoretic measure of the global stability of a unitary evolution against perturbations. We use random matrix theory arguments to conjecture that the operator fidelity metric can be used as an "order parameter" to discriminates phases with regular behaviour from quantum chaotic ones. A numerical study of the onset of chaotic in the Dicke model is given in order to support the conjecture
description: 4 pages, 3 figures
$O(α_s^2)$ and $O(α_s^3)$ Heavy Flavor Contributions to Transversity at $Q^2 \gg m^2$
Creators: name: Blümlein, J.
name: Klein, S.
name: Tödtli, B.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In deep-inelastic processes the heavy flavor Wilson coefficients factorize for $Q^2 \gg m^2$ into the light flavor Wilson coefficients of the corresponding process and the massive operator matrix elements (OMEs). We calculate the $O(α_s^2)$ and $O(α_s^3)$ massive OME for the flavor non-singlet transversity distribution. At $O(α_s^2)$ the OME is obtained for general values of the Mellin variable $N$, while at $O(α_s^3)$ the moments $N = 1$ to 13 are computed. The terms $\propto T_F$ of the 3--loop transversity anomalous dimension are obtained and results in the literature are confirmed. We discuss the relation of these contributions to the Soffer bound for transversity.
description: 25 papes, 5 figures, 1 style file
EXPLORING EXCELLENCE IN MEDIA EDUCATION: DEPARTMENT OF MASS COMMUNICATION, AUCHI POLYTECHNIC
Creators: name: Michael, Oluwadare Adebayo
Publisher: name: hollex journal
Year: 2025
Subjects: Effects, Artificial Intelligence, Modern Advertising Practices.

description: Artificial intelligence (AI), defined as the simulation of human intelligence by machines, enables automated data analysis, personalized marketing, and enhanced consumer interactions. This study explores the integration and effects of AI in advertising, revealing that while advertisers increasingly leverage AI technologies for efficiency and effectiveness, consumer awareness of AI's role remains limited and fragmented. This review was anchored on Technological Determinism theory. The research, using secondary data, highlights AI's capability to tailor advertisements, predict consumer behavior, and improve engagement through tools like chatbots and virtual assistants. Despite privacy concerns, AI's precise targeting and personalized content are revolutionizing advertising strategies, driving innovation and satisfaction. The study emphasizes the need for a comprehensive understanding of AI's applications and effects, suggesting that AI is a primary driver of change in advertising, influencing consumer behavior and industry practices. The ongoing evolution of AI technology is expected to further advance advertising techniques, reinforcing its role as a critical force in the digital age
Discovery of extended X-ray emission around the highly magnetic RRAT J1819-1458
Creators: name: Rea, N.
name: McLaughlin, M. A.
name: Gaensler, B. M.
name: Slane, P. O.
name: Stella, L.
name: Reynolds, S. P.
name: Burgay, M.
name: Israel, G. L.
name: Possenti, A.
name: Chatterjee, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We report on the discovery of extended X-ray emission around the high magnetic field Rotating Radio Transient J1819-1458. Using a 30ks Chandra ACIS-S observation, we found significant evidence for extended X-ray emission with a peculiar shape: a compact region out to 5.5", and more diffuse emission extending out to ~13" from the source. The most plausible interpretation is a nebula somehow powered by the pulsar, although the small number of counts prevents a conclusive answer on the nature of this emission. RRAT J1819-1458's spin-down energy loss rate (Edot~3x10^{32} erg/s) is much lower than that of other pulsars with observed spin-down powered pulsar wind nebulae (PWNe), and implies a rather high X-ray efficiency of eta_{X} = L_(pwn; 0.5-8keV)/Edot~0.2 at converting spin-down power into the PWN X-ray emission. This suggests the need of an additional source of energy rather than the spin-down power alone, such as the high magnetic energy of this source. Furthermore, this Chandra observation allowed us to refine the positional accuracy of RRAT J1819-1458 to a radius of ~0.3", and confirms the presence of X-ray pulsations and the ~1keV absorption line, previously observed in the X-ray emission of this source.
description: 5 pages, 3 figures; ApJ Letter accepted
The archival preservation of independent music production : a constructivist grounded theory study
Creators: name: Triponez, Tristan
Publisher: name: University of British Columbia
Year: 2024

description: This dissertation, written from the perspective of archival science, studies the original recordings created in the production of contemporary independent popular music as cultural heritage generally neglected by memory institutions. Inaccessible to the public, such recordings may be demos, live recordings, multitrack and production masters, alternate versions, and more. From a musicology perspective, these materials can be equally insightful as commercially published material. The thesis focuses on how music is produced. Understanding music production is fundamental to addressing not only preservation questions but also issues of representation of popular music in the collective memory. The purpose of this dissertation was to produce an explorative qualitative study, guided by the research question of how the practices of creation and keeping of music recordings by individuals involved in independent popular music production impact the potential long-term preservation of such recordings. The research is designed as a constructivist grounded theory study. Seventeen artists were intensively interviewed. The analysis of the interviews resulted in theoretical concepts grouped in four analytical categories addressing the social and physical environment, the technological environment, the creativity of the process, including the shift to self-producing, and the materiality of its results and creators’ struggles to preserve them. The theoretical conclusion, based on archival analysis, was that the social, technological and material complexity of independent popular music production renders its preservation difficult, resulting in the misrepresentation and underrepresentation of this type of documentary heritage in the collective memory. The dissertation suggests that, pragmatically, a “Community Archives” approach would serve independent popular music well. As these initiatives appear to be rare, diverse approaches to enabling participatory community engagement are considered valuable. It is suggested that archival education and practices needs to foster initiatives based on an increased appreciation of popular culture. Helping preserve popular music as documentary heritage and ensuring its representation in collective memory are regarded as matters of archival deontology.
Scaling Properties of Ge-SixGe1-x Core-Shell Nanowire Field Effect Transistors
Creators: name: Nah, Junghyo
name: Liu, En-Shao
name: Varahramyan, Kamran M.
name: Shahrjerdi, Davood
name: Banerjee, Sanjay K.
name: Tutuc, Emanuel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate the fabrication of high-performance Ge-SixGe1-x core-shell nanowire field-effect transistors with highly doped source and drain, and systematically investigate their scaling properties. Highly doped source and drain regions are realized by low energy boron implantation, which enables efficient carrier injection with a contact resistance much lower than the nanowire resistance. We extract key device parameters, such as intrinsic channel resistance, carrier mobility, effective channel length, and external contact resistance, as well as benchmark the device switching speed and ON/OFF current ratio.
description: 5 pages, 4 figures. IEEE Transactions on Electron Devices (in press)
Pairing dynamics in strongly correlated superconductivity
Creators: name: Kyung, B.
name: Sénéchal, D.
name: Tremblay, A. -M. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Confirmation of the phononic origin of Cooper pair formation in superconductors came with the demonstration that the interaction was retarded and that the corresponding energy scales were associated with phonons. Using cellular dynamical mean-field theory for the two-dimensional Hubbard model, we identify such retardation effects in d-wave pairing and associate the corresponding energy scales with short-range spin fluctuations. We find which frequencies are relevant for pairing as a function of interaction strength and doping and show that the disappearance of superconductivity on the overdoped side coincides with the disappearance of the low energy feature in the antiferromagnetic fluctuations, as observed in neutron scattering experiments.
description: LaTeX, 8 pages, 8 figures
title: Readability and the Bank of Canada
Creators: name: Deslongchamps, Alexandre
Publisher: name: Bank of Canada
Year: 2018

description: In this note, I assess the readability of Bank of Canada publications using a formula commonly used for this type of evaluation. I find that Bank publications are more difficult to read than the media articles and other content our target audiences likely consume. This suggests that more simple writing can help the Bank better meet its communication objectives.
description: Dans la présente note, l’auteur évalue la lisibilité des publications de la Banque du Canada au moyen d’une formule couramment utilisée pour ce type d’analyse. Il estime que les publications de la Banque sont plus difficiles à lire que les articles dans les médias et les textes que lisent vraisemblablement nos publics cibles. Les résultats de l’analyse donnent à penser qu’un style plus simple permettrait à la Banque de mieux atteindre ses objectifs de communication.
Cavity optomechanics using an optically levitated nanosphere
Creators: name: Chang, D. E.
name: Regal, C. A.
name: Papp, S. B.
name: Wilson, D. J.
name: Ye, J.
name: Painter, O.
name: Kimble, H. J.
name: Zoller, P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, remarkable advances have been made in coupling a number of high-Q modes of nano-mechanical systems to high-finesse optical cavities, with the goal of reaching regimes where quantum behavior can be observed and leveraged toward new applications. To reach this regime, the coupling between these systems and their thermal environments must be minimized. Here we propose a novel approach to this problem, in which optically levitating a nano-mechanical system can greatly reduce its thermal contact, while simultaneously eliminating dissipation arising from clamping. Through the long coherence times allowed, this approach potentially opens the door to ground-state cooling and coherent manipulation of a single mesoscopic mechanical system or entanglement generation between spatially separate systems, even in room temperature environments. As an example, we show that these goals should be achievable when the mechanical mode consists of the center-of-mass motion of a levitated nanosphere.
description: 33 pages, 6 figures, minor revisions, references added
Rethinking Iroquoian Stone Endscraper Use
Creators: name: Engelbrecht, William
Year: 2020
Subjects: subject: Western New York
valueUri: https://core.tdar.org/browse/geographic-keyword/2816/western-new-york
subject: Multi-component
valueUri: https://core.tdar.org/browse/temporal-keyword/204/multi-component
subject: Woodland
valueUri: https://core.tdar.org/browse/culture-keyword/13/woodland
subject: PaleoIndian
valueUri: https://core.tdar.org/browse/culture-keyword/4/paleoindian
subject: Archaic
valueUri: https://core.tdar.org/browse/culture-keyword/8/archaic
subject: Early Archaic
valueUri: https://core.tdar.org/browse/culture-keyword/9/early-archaic
subject: Historic
valueUri: https://core.tdar.org/browse/culture-keyword/25/historic
subject: Middle Archaic
valueUri: https://core.tdar.org/browse/culture-keyword/10/middle-archaic
subject: Late Archaic
valueUri: https://core.tdar.org/browse/culture-keyword/11/late-archaic
subject: Eaton
valueUri: https://core.tdar.org/browse/site-name/910/eaton
subject: Domestic Structures
valueUri: https://core.tdar.org/browse/site-type/256/domestic-structures
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Hide
valueUri: https://core.tdar.org/browse/material-type/18/hide
subject: endscrapers
valueUri: https://core.tdar.org/browse/material-type/3271/endscrapers
subject: Endscraper
valueUri: https://core.tdar.org/browse/other-keyword/22730/endscraper
subject: Collections Research
valueUri: https://core.tdar.org/browse/investigation-type/3/collections-research

description: This article argues that Iroquoian endscrapers were used to scrape thick hides like bear, rather than thin hides like deer. For Tables and Figures, contact William Engelbrecht, engelbwe@gmail.com.
Chemical Evolution of the Juvenile Universe
Creators: name: Wasserburg, G. J.
name: Qian, Y. -Z.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Only massive stars contribute to the chemical evolution of the juvenile universe corresponding to [Fe/H]-0.32. Recent observations show that there are stars with [Sr/Fe]
description: 10 pages, 9 figures, to appear in Pub. Astron. Soc. Australia
$\textit{Ab initio}$ dynamical mean-field theory with natural orbitals renormalization group impurity solver: Formalism and applications
Creators: name: Wang, Jia-Ming
name: Wang, Jing-Xuan
name: He, Rong-Qiang
name: Huang, Li
name: Lu, Zhong-Yi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In this study, we introduce a novel implementation of density functional theory integrated with single-site dynamical mean-field theory to investigate the complex properties of strongly correlated materials. This comprehensive first-principles many-body computational toolkit, termed $\texttt{Zen}$, utilizes the Vienna $\textit{ab initio}$ simulation package and the $\texttt{Quantum ESPRESSO}$ code to perform density functional theory calculations and generate band structures for realistic materials. The challenges associated with correlated electron systems are addressed through two distinct yet complementary quantum impurity solvers: the natural orbitals renormalization group solver for zero temperature and the hybridization expansion continuous-time quantum Monte Carlo solver for finite temperature. Additionally, this newly developed toolkit incorporates several valuable post-processing tools, such as $\texttt{ACFlow}$, which employs the maximum entropy method and the stochastic pole expansion method for the analytic continuation of Matsubara Green's functions and self-energy functions. To validate the performance of this toolkit, we examine three representative cases: the correlated metal SrVO$_{3}$, the nickel-based unconventional superconductor La$_{3}$Ni$_{2}$O$_{7}$, and the wide-gap Mott insulator MnO. The results obtained demonstrate strong agreement with experimental findings and previously available theoretical results. Notably, we successfully elucidate the quasiparticle peak and band renormalization in SrVO$_{3}$, the dominance of Hund correlation in La$_{3}$Ni$_{2}$O$_{7}$, and the pressure-driven insulator-metal transition as well as the high-spin to low-spin transition in MnO. These findings suggest that $\texttt{Zen}$ is proficient in accurately describing the electronic structures of $d$-electron correlated materials.
description: 14 pages, 8 figures, 1 table