cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pinning and collective modes of a vortex lattice in a Bose-Einstein condensate
Creators: name: Reijnders, J. W.
name: Duine, R. A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider the ground state of vortices in a rotating Bose-Einstein condensate that is loaded in a corotating two-dimensional optical lattice. Due to the competition between vortex interactions and their potential energy, the vortices arrange themselves in various patterns, depending on the strength of the optical potential and the vortex density. We outline a method to determine the phase diagram for arbitrary vortex filling factor. Using this method, we discuss several filling factors explicitly. For increasing strength of the optical lattice, the system exhibits a transition from the unpinned hexagonal lattice to a lattice structure where all the vortices are pinned by the optical lattice. The geometry of this fully pinned vortex lattice depends on the filling factor and is either square or triangular. For some filling factors there is an intermediate half-pinned phase where only half of the vortices is pinned. We also consider the case of a two-component Bose-Einstein condensate, where the possible coexistence of the above-mentioned phases further enriches the phase diagram. In addition, we calculate the dispersion of the low-lying collective modes of the vortex lattice and find that, depending on the structure of the ground state, they can be gapped or gapless. Moreover, in the half-pinned and fully pinned phases, the collective mode dispersion is anisotropic. Possible experiments to probe the collective mode spectrum, and in particular the gap, are suggested.
description: 29 pages, 4 figures, changes in section V
The isovector effective charge and the staggering of the 2+ to 0+ transition probabilities in the Titanium isotopes
Creators: name: Caurier, E.
name: Nowacki, F.
name: Poves, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In an effort to understand the magical status of N=32 and N=34 at the very neutron rich edge, experiments have been carried out in the Titanium isotopes up to A=56. The measured staggering of the B(E2)'s is not reproduced by the shell model calculations using the best effective interactions. We argue that this may be related to the choice of the isovector effective charge and to the value of the N=34 neutron gap.
description: 2 pages, 2 figures
Supplementary figure legends from Apoptosis in gonadal somatic cells of scleractinian corals: implications of structural adjustments for gamete production and release
Creators: name: Shikina, Shinya
name: Che-Chun Chen
name: Chiu, Yi-Ling
name: Pin-Hsuan Tsai
name: Ching-Fong Chang
Publisher: name: The Royal Society
Year: 2020
Subjects: Cell Biology

description: Figure legends for the supplementary figures
Yuyay Ñawpa
Creators: name: ADRIAN ORIEL, CHEJE APAZA
name: Estefani, Quilla gutierrez
name: Arnold David, Mollo Aquima
name: Alexis Luis Angel, Arroyo Huarachi
Publisher: name: Zenodo
Year: 2021

description: Videojuego Yayakim Dedicado a alumnos de primaria y secundaria. Link del juego: https://shokami.itch.io/yayakimlife
Energetic and conformational studies of nonspecific adsorption of simple protein-like chain molecules using dynamic Monte Carlo simulations
Creators: name: Liu, Susan Marisa
Publisher: name: University of British Columbia
Year: 2009

description: Dynamic Monte Carlo simulations of short HP (hydrophobic-polar) protein-like chains to solid-liquid surfaces are used to probe thermodynamic and dynamic aspects of protein adsorption. The HP model enables the enumeration of all chain conformations, thereby aiding understanding of the relation between adsorption thermodynamics and changes in accessible chain conformations resulting from the sorption process. Simulation results indicate that HP chains having a single conformation at their lowest energy in solution adsorb such that the new lowest energy state of the system is conformationally degenerate. As a result, adsorption can lead to an increase in chain entropy. Entropically-driven adsorption is found to be likely when the interaction energy between the hydrophobic segments of the chain and the sorbent is weak and equals the contact energy between two hydrophobic units within the chain. Chain sequence and sorbent properties are shown to profoundly influence adsorption thermodynamics. Simulations are carried out where intra- and intermolecular hydrophobic interaction energies are varied to examine the influence of the stability of the native-state conformation on adsorption thermodynamics over a range of sorbent hydrophobicities. Lower stability chains tend to adsorb more readily on hydrophilic sorbents and experience greater average changes in conformation, usually accompanied by a loss in entropy. Adsorption to more hydrophobic sorbents leads to a loss in chain conformational entropy, irrespective of the stability of the native state. Lateral confinement on the sorbent surface is shown to greatly reduce the degrees of freedom in the chain, thereby resulting in a strong stabilization of the native-state conformation of the chain in its adsorbed state. This effect is compared to experimental data for nonspecific adsorption of hen egg-white lysozyme to silica to explain the increase in adsorbed enzyme activity as a function of surface loading and geometry. Studies of run-averaged energy trajectories for chain adsorption indicate that the process follows a basic energy path characterized by well-defined energy levels, suggesting the presence of natural kinetic barriers. This thesis demonstrates the value of simple mesoscopic protein-like chain models and dynamic Monte Carlo simulations of their adsorption behavior in understanding better the mechanisms and forces driving nonspecific protein adsorption.
Circum- and Inconic Invariants of 3-Periodics in the Elliptic Billiard
Creators: name: Reznik, Dan
name: Garcia, Ronaldo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Dynamical Systems (math.DS)
subject: Computational Geometry (cs.CG)
subject: Robotics (cs.RO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 51M04, 37D50, 51N20, 51N35, 68T20

description: A Circumconic passes through a triangle's vertices; an Inconic is tangent to the sidelines. We study the variable geometry of certain conics derived from the 1d family of 3-periodics in the Elliptic Billiard. Some display intriguing invariances such as aspect ratio and pairwise ratio of focal lengths.
description: 20 pages, 8 figures, 4 tables, 8 videos NOTE: the original contained two parts, after replacement only the 2nd part. the 1st part was moved to another submission: submit/3126471
Revised Supplementary Tables and Figures from Apoptosis in gonadal somatic cells of scleractinian corals: implications of structural adjustments for gamete production and release
Creators: name: Shikina, Shinya
name: Che-Chun Chen
name: Chiu, Yi-Ling
name: Pin-Hsuan Tsai
name: Ching-Fong Chang
Publisher: name: The Royal Society
Year: 2020
Subjects: Cell Biology

description: Apoptosis is an evolutionarily conserved process of programmed cell death. Here, we show structural changes in the gonads caused by apoptosis during gametogenesis in the scleractinian coral, Euphyllia ancora. Anatomical and histological analyses revealed that from the non-spawning to the spawning season, testes and ovaries increased in size due to active proliferation, differentiation and development of germ cells. Additionally, the thickness and cell density of the gonadal somatic layer decreased significantly as the spawning season approached. Further analyses demonstrated that the changes in the gonadal somatic layer were caused by apoptosis in a subpopulation of gonadal somatic cells. The occurrence of apoptosis in the gonadal somatic layer was also confirmed in other scleractinian corals. Our findings suggest that decreases in thickness and cell density of the gonadal somatic layer are structural adjustments facilitating oocyte and spermary (male germ cell cluster) enlargement and subsequent gamete release from the gonads. In animal reproduction, apoptosis in germ cells is an important process that controls the number and quality of gametes. However, apoptosis in gonadal somatic cells has rarely been reported among metazoans. Thus, our data provide evidence for a unique use of apoptosis in animal reproduction.
Towards a More Standardized Candle Using GRB Energetics and Spectra
Creators: name: Friedman, Andrew S.
name: Bloom, Joshua S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The use of GRB energetics for cosmography has long been advanced as a means to probe out to high redshifts, to the epoch of deceleration. However, the prompt energy release in GRBs, even when corrected for jetting geometry, is far from being a standard candle. We explore the cosmographic potential of a GRB standard candle based on the newly-discovered relation by Ghirlanda et al. between the apparent geometry-corrected energies (E_gamma) and the peak of the prompt burst spectrum (E_p). We present an explicit, self-consistent formalism for correcting GRB energies with a thorough accounting for observational uncertainties. In contrast to other work, we demonstrate that the current sample of 19 GRBs is not yet cosmographically competitive with results from other studies (e.g., SNe Ia). Although the E_p-E_gamma relation is a significant correlation across a range of cosmologies, the goodness of fit of the data to a power law, depends strongly on input assumptions -- especially the unknown density of the circumburst medium. Independent of assumptions, with very few low-z bursts, the current sample is most sensitive to Omega_M but essentially insensitive to Omega_Lambda. The proper use of the relation clearly brings GRBs an impressive step closer toward a standardizable candle, but until the physical origin of the E_p-E_gamma relation is understood, calibrated with a training set of low redshift bursts, and the major potential systematic uncertainties and selection effects are addressed, we urge caution concerning claims of the utility of GRBs for cosmography (abridged).
description: 45 pages, 4 figures, 2 tables. Revised version with updated data from the literature. Cosmographic sensitivity to input assumptions now fully explicated and systematic errors addressed. Main conclusions unchanged from the previous version
Appendix from Inferring generation-interval distributions from contact-tracing data
Creators: name: Park, Sang Woo
name: Champredon, David
name: Dushoff, Jonathan
Publisher: name: The Royal Society
Year: 2020
Subjects: subject: Computational Biology
subject: 10202 Biological Mathematics
subject: FOS: Mathematics

description: Generation intervals, defined as the time between when an individual is infected and when that individual infects another person, link two key quantities that describe an epidemic: the initial reproductive number, ${{\cal R}}_{{\rm initial}}$, and the initial rate of exponential growth, r. Generation intervals can be measured through contact tracing by identifying who infected whom. We study how realized intervals differ from ‘intrinsic’ intervals that describe individual-level infectiousness, and identify both spatial and temporal effects, including truncating (due to observation time), and the effects of susceptible depletion at various spatial scales. Early in an epidemic, we expect the variation in the realized generation intervals to be mainly driven by truncation and by the population structure near the source of disease spread; we predict that correcting realized intervals for the effect of temporal truncation but not for spatial effects will provide the initial forward generation-interval distribution, which is spatially informed and correctly links r and ${{\cal R}}_{{\rm initial}}$. We develop and test statistical methods for temporal corrections of generation intervals, and confirm our prediction using individual-based simulations on an empirical network.
The Confinement of the Heliosheath Plasma by the Solar Magnetic Field as Revealed by Energetic Neutral Atom Simulations
Creators: name: Kornbleuth, M.
name: Opher, M.
name: Michael, A. T.
name: Sokol, J. M.
name: Toth, G.
name: Tenishev, V.
name: Drake, J. F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Traditionally, the solar magnetic field has been considered to have a negligible effect in the outer regions of the heliosphere. Recent works have shown that the solar magnetic field may play a crucial role in collimating the plasma in the heliosheath. Interstellar Boundary Explorer (IBEX) observations of the heliotail indicated a latitudinal structure varying with energy in the energetic neutral atom (ENA) fluxes. At energies ~1 keV, the ENA fluxes show an enhancement at low latitudes and a deficit of ENAs near the poles. At energies >2.7 keV, ENA fluxes had a deficit within low latitudes, and lobes of higher ENA flux near the poles. This ENA structure was initially interpreted to be a result of the latitudinal profile of the solar wind during solar minimum. We extend the work of Kornbleuth et al. (2018) by using solar minimum-like conditions and the recently developed SHIELD model. The SHIELD model couples the magnetohydrodynamic (MHD) plasma solution with a kinetic description of neutral hydrogen. We show that while the latitudinal profile of the solar wind during solar minimum contributes to the lobes in ENA maps, the collimation by the solar magnetic field is important in creating and shaping the two high latitude lobes of enhanced ENA flux observed by IBEX. This is the first work to explore the effect of the changing solar magnetic field strength on ENA maps. Our findings suggest that IBEX is providing the first observational evidence of the collimation of the heliosheath plasma by the solar magnetic field.
description: Accepted for publication in ApJL
Additional file 1 of Impacts of food consumption on biochemical markers and anthropometric variables of women with metabolic syndrome
Creators: name: Michalichen, Kelly Cristiane
name: Weber, Vinícius Muller Reis
name: Queiroga, Marcos Roberto
name: Fernandes, Daniel Zanardini
name: Carreira, Clisia Mara
name: Vieira, Edgar Ramos
name: Venturini, Danielle
Publisher: name: figshare
Year: 2022
Subjects: subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: Cardiology

description: Additional file 1.
Supplementary file 3 from Apoptosis in gonadal somatic cells of scleractinian corals: implications of structural adjustments for gamete production and release
Creators: name: Shikina, Shinya
name: Che-Chun Chen
name: Chiu, Yi-Ling
name: Pin-Hsuan Tsai
name: Ching-Fong Chang
Publisher: name: The Royal Society
Year: 2020
Subjects: Cell Biology

description: The deduced amino acid sequences of TNF and TNF receptors in E. ancora
A Unified Deep Semantic Expansion Framework for Domain-Generalized Person Re-identification
Creators: name: Ang, Eugene P. W.
name: Lin, Shan
name: Kot, Alex C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Supervised Person Re-identification (Person ReID) methods have achieved excellent performance when training and testing within one camera network. However, they usually suffer from considerable performance degradation when applied to different camera systems. In recent years, many Domain Adaptation Person ReID methods have been proposed, achieving impressive performance without requiring labeled data from the target domain. However, these approaches still need the unlabeled data of the target domain during the training process, making them impractical in many real-world scenarios. Our work focuses on the more practical Domain Generalized Person Re-identification (DG-ReID) problem. Given one or more source domains, it aims to learn a generalized model that can be applied to unseen target domains. One promising research direction in DG-ReID is the use of implicit deep semantic feature expansion, and our previous method, Domain Embedding Expansion (DEX), is one such example that achieves powerful results in DG-ReID. However, in this work we show that DEX and other similar implicit deep semantic feature expansion methods, due to limitations in their proposed loss function, fail to reach their full potential on large evaluation benchmarks as they have a tendency to saturate too early. Leveraging on this analysis, we propose Unified Deep Semantic Expansion, our novel framework that unifies implicit and explicit semantic feature expansion techniques in a single framework to mitigate this early over-fitting and achieve a new state-of-the-art (SOTA) in all DG-ReID benchmarks. Further, we apply our method on more general image retrieval tasks, also surpassing the current SOTA in all of these benchmarks by wide margins.
description: Neurocomputing Volume 600, 1 October 2024, 128120. 15 pages
Charm jets as a probe for strangeness at the future Electron-Ion Collider
Creators: name: Arratia, Miguel
name: Furletova, Yulia
name: Hobbs, T. J.
name: Olness, Fredrick
name: Sekula, Stephen J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We explore the feasibility of the measurement of charm-jet cross sections in charged-current deep-inelastic scattering at the future Electron-Ion Collider. This channel provides clean sensitivity to the strangeness content of the nucleon in the high-$x$ region. We estimate charm-jet tagging performance with parametrized detector simulations. We show the expected sensitivity to various scenarios for strange parton distribution functions. We argue that this measurement will be key to future QCD global analyses, so it should inform EIC detector designs and luminosity requirements.
description: 17 pages, 12 figures, 2 tables; added new plots showing PDF error bands in s(x,Q) and Rs(x,Q) to illustrate range of uncertainty on these quantities
General partonic structure for hadronic spin asymmetries
Creators: name: Anselmino, M.
name: Boglione, M.
name: D'Alesio, U.
name: Leader, E.
name: Melis, S.
name: Murgia, F.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The high energy and large p_T inclusive polarized process, (A, S_A) + (B, S_B) --> C + X, is considered under the assumption of a generalized QCD factorization scheme. For the first time all transverse motions, of partons in hadrons and of hadrons in fragmenting partons, are explicitly taken into account; the elementary interactions are computed at leading order with noncollinear exact kinematics, which introduces many phases in the expressions of their helicity amplitudes. Several new spin and k_T dependent soft functions appear and contribute to the cross sections and to spin asymmetries; we put emphasis on their partonic interpretation, in terms of quark and gluon polarizations inside polarized hadrons. Connections with other notations and further information are given in some Appendices. The formal expressions for single and double spin asymmetries are derived. The transverse single spin asymmetry A_N, for p(transv. polarized) p --> pion + X processes is considered in more detail, and all contributions are evaluated numerically by saturating unknown functions with their upper positivity bounds. It is shown that the integration of the phases arising from the noncollinear kinematics strongly suppresses most contributions to the single spin asymmetry, leaving at work predominantly the Sivers effect and, to a lesser extent, the Collins mechanism.
description: RevTeX, 46 pages, 5 ps figures. v2: some clarifying comments and appendix on kinematics added, references updated, published version
Prairie Farms Dairy, Inc.: Economic Impact of a Dairy Cooperative [This report is now at http://purl.umn.edu/180971]
Creators: name: Cook, Hugh L.
name: Combs, Robert P.
name: Cook, Hugh L.
name: Combs, Robert P.
Publisher: name: Unknown
Year: 1982
Subjects: subject: Livestock Production/Industries
subject: Dairy cooperative
subject: fluid milk
subject: processing
subject: distribution
subject: history
subject: economic impact.

description: This report is now at http: //purl.umn.edu/180971
Electron-hole coupling in high-Tc cuprate superconductors
Creators: name: Brinkman, A.
name: Hilgenkamp, H.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: From recent Hall effect measurements and angle-resolved photo-emission spectroscopy the interesting picture emerges of co-existing hole- and electron-like quasiparticle bands, both in electron- and hole-doped superconducting cuprates. We reflect on the idea that bosonic electron-hole pairs may be formed in the cuprates and on the possibility that these pairs undergo Bose-Einstein condensation. The relevance to high-Tc superconductivity in the cuprates will be discussed.
Diverse Deep Feature Ensemble Learning for Omni-Domain Generalized Person Re-identification
Creators: name: Ang, Eugene P. W.
name: Lin, Shan
name: Kot, Alex C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Person Re-identification (Person ReID) has progressed to a level where single-domain supervised Person ReID performance has saturated. However, such methods experience a significant drop in performance when trained and tested across different datasets, motivating the development of domain generalization techniques. However, our research reveals that domain generalization methods significantly underperform single-domain supervised methods on single dataset benchmarks. An ideal Person ReID method should be effective regardless of the number of domains involved, and when test domain data is available for training it should perform as well as state-of-the-art (SOTA) fully supervised methods. This is a paradigm that we call Omni-Domain Generalization Person ReID (ODG-ReID). We propose a way to achieve ODG-ReID by creating deep feature diversity with self-ensembles. Our method, Diverse Deep Feature Ensemble Learning (D2FEL), deploys unique instance normalization patterns that generate multiple diverse views and recombines these views into a compact encoding. To the best of our knowledge, our work is one of few to consider omni-domain generalization in Person ReID, and we advance the study of applying feature ensembles in Person ReID. D2FEL significantly improves and matches the SOTA performance for major domain generalization and single-domain supervised benchmarks.
description: ICMIP '24: Proceedings of the 2024 9th International Conference on Multimedia and Image Processing, Pages 64 - 71
Self-Organized Stigmergic Document Maps: Environment as a Mechanism for Context Learning
Creators: name: Ramos, Vitorino
name: Merelo, Juan J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences
subject: I.5; I.5.3; I.4; I.2.11

description: Social insect societies and more specifically ant colonies, are distributed systems that, in spite of the simplicity of their individuals, present a highly structured social organization. As a result of this organization, ant colonies can accomplish complex tasks that in some cases exceed the individual capabilities of a single ant. The study of ant colonies behavior and of their self-organizing capabilities is of interest to knowledge retrieval/management and decision support systems sciences, because it provides models of distributed adaptive organization which are useful to solve difficult optimization, classification, and distributed control problems, among others. In the present work we overview some models derived from the observation of real ants, emphasizing the role played by stigmergy as distributed communication paradigm, and we present a novel strategy to tackle unsupervised clustering as well as data retrieval problems. The present ant clustering system (ACLUSTER) avoids not only short-term memory based strategies, as well as the use of several artificial ant types (using different speeds), present in some recent approaches. Moreover and according to our knowledge, this is also the first application of ant systems into textual document clustering. KEYWORDS: Swarm Intelligence, Ant Systems, Unsupervised Clustering, Data Retrieval, Data Mining, Distributed Computing, Document Maps, Textual Document Clustering.
description: 10 pages, 5 figures, at http://alfa.ist.utl.pt/~cvrm/staff/vramos/ref_42.html
Nonlinear modeling and characterization of ultrasoft silicone elastomers
Creators: name: Das, Asimanshu
name: Breuer, Kenneth S.
name: Mathai, Varghese
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We introduce a strain-energy based nonlinear hyper-elastic formulation to model the material properties of ultrasoft dielectric elastomers over a wide range of elastic properties, prestretch, and thicknesses. We build on the uniaxial Gent formulation, and under the conditions of equi-biaxial strain, derive an expression for the bulge deformation versus pressure. A circular bulge test methodology is developed to experimentally measure the mechanical response of the silicone membranes. The Gent model captures both neo-Hookean and strain-stiffening behaviors, and gives predictions which are in agreement with experimental measurements. Membranes with different thinner fractions are characterized over nearly one order of magnitude variation in shear modulus. Stiffer membranes are observed to harden at lower stretch ratios due to the increased fraction of polymer chains in them. The present approach offers a simple and cost-effective procedure for characterizing soft membranes under commonly encountered biaxial deformation conditions.
description: 5 pages, 4 figures. Applied Physics Letters (Accepted)
Universality of soft and collinear factors in hard-scattering factorization
Creators: name: Collins, John C.
name: Metz, Andreas
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Universality in QCD factorization of parton densities, fragmentation functions, and soft factors is endangered by the process dependence of the directions of Wilson lines in their definitions. We find a choice of directions that is consistent with factorization and that gives universality between e^+e^- annihilation, semi-inclusive deep-inelastic scattering, and the Drell-Yan process. Universality is only modified by a time-reversal transformation of the soft function and parton densities between Drell-Yan and the other processes, whose only effect is the known reversal of sign for T-odd parton densities like the Sivers function. The modifications of the definitions needed to remove rapidity divergences with light-like Wilson lines do not affect the results.
description: 4 pages. Extra references. Text and references as in published version
Vacuum Stability in Split Susy and Little Higgs Models
Creators: name: Datta, Alakabha
name: Zhang, Xinmin
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the stability of the effective higgs potential in the split supersymmetry and Little Higgs models. In particular, we study the effects of higher dimensional operators in the effective potential on the higgs mass predictions. We find that the size and sign of the higher dimensional operators can significantly change the higgs mass required to maintain vacuum stability in Split Susy models. In the Little Higgs models the effects of higher dimensional operators can be large because of a relatively lower cut-off scale. Working with a specific model we find that a contribution from the higher dimensional operator with coefficient of O(1) can destabilize the vacuum.
description: Latex 22 pages, 3 figures. Added discussion, published version
Aligned Divergent Pathways for Omni-Domain Generalized Person Re-Identification
Creators: name: Ang, Eugene P. W.
name: Lin, Shan
name: Kot, Alex C.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Person Re-identification (Person ReID) has advanced significantly in fully supervised and domain generalized Person R e ID. However, methods developed for one task domain transfer poorly to the other. An ideal Person ReID method should be effective regardless of the number of domains involved in training or testing. Furthermore, given training data from the target domain, it should perform at least as well as state-of-the-art (SOTA) fully supervised Person ReID methods. We call this paradigm Omni-Domain Generalization Person ReID, referred to as ODG-ReID, and propose a way to achieve this by expanding compatible backbone architectures into multiple diverse pathways. Our method, Aligned Divergent Pathways (ADP), first converts a base architecture into a multi-branch structure by copying the tail of the original backbone. We design our module Dynamic Max-Deviance Adaptive Instance Normalization (DyMAIN) that encourages learning of generalized features that are robust to omni-domain directions and apply DyMAIN to the branches of ADP. Our proposed Phased Mixture-of-Cosines (PMoC) coordinates a mix of stable and turbulent learning rate schedules among branches for further diversified learning. Finally, we realign the feature space between branches with our proposed Dimensional Consistency Metric Loss (DCML). ADP outperforms the state-of-the-art (SOTA) results for multi-source domain generalization and supervised ReID within the same domain. Furthermore, our method demonstrates improvement on a wide range of single-source domain generalization benchmarks, achieving Omni-Domain Generalization over Person ReID tasks.
description: 2024 International Conference on Electrical, Computer and Energy Technologies (ICECET)
Equity Redemption: Issues and Alternatives for Farmer Cooperatives [This report is now at http://purl.umn.edu/180969]
Creators: name: Cobia, David W.
name: Royer, Jeffrey S.
name: Wissman, Roger A.
name: Smith, Dennis Paul
name: Davidson, Donald R.
name: Lurya, Stephen D.
name: Mather, J. Warren
name: Brown, Phillip F.
name: Krueger, Kenneth P.
name: Cobia, David W.
name: Royer, Jeffrey S.
name: Wissman, Roger A.
name: Smith, Dennis Paul
name: Davidson, Donald R.
name: Lurya, Stephen D.
name: Mather, J. Warren
name: Brown, Phillip F.
name: Krueger, Kenneth P.
Publisher: name: Unknown
Year: 1982
Subjects: subject: Agribusiness
subject: Cooperatives
subject: Finance
subject: Equity redemption
subject: Law
subject: FOS: Law
subject: Tax

description: This report is now at http://purl.umn.edu/180969
Planet-star interactions with precise transit timing. II. The radial-velocity tides and a tighter constraint on the orbital decay rate in the WASP-18 system
Creators: name: Maciejewski, G.
name: Knutson, H. A.
name: Howard, A. W.
name: Isaacson, H.
name: Fernandez-Lajus, E.
name: Di Sisto, R. P.
name: Migaszewski, C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: From its discovery, the WASP-18 system with its massive transiting planet on a tight orbit was identified as a unique laboratory for studies on tidal planet-star interactions. In an analysis of Doppler data, which include five new measurements obtained with the HIRES/Keck-I instrument between 2012 and 2018, we show that the radial velocity signal of the photosphere following the planetary tidal potential can be distilled for the host star. Its amplitude is in agreement with both theoretical predictions of the equilibrium tide approximation and an ellipsoidal modulation observed in an orbital phase curve. Assuming a circular orbit, we refine system parameters using photometric time series from TESS. With a new ground-based photometric observation, we extend the span of transit timing observations to 28 years in order to probe the rate of the orbital period shortening. Since we found no departure from a constant-period model, we conclude that the modified tidal quality parameter of the host star must be greater than 3.9x10^6 with 95% confidence. This result is in line with conclusions drawn from studies of the population of hot Jupiters, predicting that the efficiency of tidal dissipation is 1 or 2 orders of magnitude weaker. As the WASP-18 system is one of the prime candidates for detection of orbital decay, further timing observations are expected to push the boundaries of our knowledge on stellar interiors.
description: Accepted for publication in Acta Astronomica
Electrochemical and spectroscopic studies of 2-(2’-thienyl)pyridine on Au(111)
Creators: name: Chung, Emily Susanne
Publisher: name: University of British Columbia
Year: 2009

description: The adsorption behaviour of the bifunctional molecule 2-(2'-thienyl)pyridine (TP) on Au(111) was characterized under potential control in neutral and basic aqueous solution. Initial characterization of adsorbed TP was by cyclic voltammetry (CV) and ac voltammetry in aqueous solution. CV was also performed in organic media for comparison purposes. The electrochemical behaviour of TP was compared to that of pyridine, which has been well-characterized in the literature. CV and ac voltammetric characterizations of thiophene in aqueous solution were also performed within the same potential range for comparison to TP. It was found that TP underwent both capacitive changes similar to those observed in the presence of pyridine, and redox processes similar to those observed in the presence of thiophene. Chronocoulometric characterization of the capacitive changes showed that TP initially adsorbs at negative potentials as a low-coverage layer in which interaction with the Au surface is through the aromatic TC orbitals and the plane of the rings is parallel to the surface. Scanning to more positive potentials induces a pyridine-like two-dimensional phase transition to a more condensed phase in which the molecules are bonded to Au via the lone pairs of the N and/or S (likely both). The redox processes of TP were hypothesized to be an electrochemical α,α'-coupling of the thiophene rings, followed by an oxidative charging process; where subsequent reductive discharging gives the neutral dimer, 5,5'-bis(2-pyridyl)-2,2'-bithienyl (PTTP). PTTP was synthesized chemically for comparison to the product of TP electrochemical oxidation on the electrode. The photophysical properties of TP and PTTP in solution were used to interpret in situ fluorescence results obtained at a Au(111) electrode under potential control. Spectra obtained after holding the electrode at positive potentials in the presence of TP were identical to that of chemically synthesized PTTP, confirming the dimerization hypothesis. In addition, fluorescence microscopy images were consistent with the electrochemical results regarding other states of TP. This system demonstrates that multifunctional adsorbates can create chemically-tuned surfaces capable of switching between multiple states, and allow subtle comparisons of the influence of surface-adsorbate interactions between different functional groups.
Systematic Ensemble Model Selection Approach for Educational Data Mining
Creators: name: Injadat, MohammadNoor
name: Moubayed, Abdallah
name: Nassif, Ali Bou
name: Shami, Abdallah
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: A plethora of research has been done in the past focusing on predicting student's performance in order to support their development. Many institutions are focused on improving the performance and the education quality; and this can be achieved by utilizing data mining techniques to analyze and predict students' performance and to determine possible factors that may affect their final marks. To address this issue, this work starts by thoroughly exploring and analyzing two different datasets at two separate stages of course delivery (20 percent and 50 percent respectively) using multiple graphical, statistical, and quantitative techniques. The feature analysis provides insights into the nature of the different features considered and helps in the choice of the machine learning algorithms and their parameters. Furthermore, this work proposes a systematic approach based on Gini index and p-value to select a suitable ensemble learner from a combination of six potential machine learning algorithms. Experimental results show that the proposed ensemble models achieve high accuracy and low false positive rate at all stages for both datasets.
description: 47 Pages, 20 figures, 13 tables, accepted in Elsevier's Knowledge-Based Systems
Additional file 1 of Combining denoising of RNA-seq data and flux balance analysis for cluster analysis of single cells
Creators: name: Galuzzi, Bruno G.
name: Vanoni, Marco
name: Damiani, Chiara
Publisher: name: figshare
Year: 2022
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Hematology
subject: Computational Biology

description: Additional file 1. Cell-cycle effect on flux cluster analysis.