cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The behaviour of Galois Gauss sums with respect to restriction of characters
Creators: name: Margolick, Michael William
Publisher: name: University of British Columbia
Year: 2010

description: The theory of abelian and non-abelian L-functions is developed with a view to providing an understanding of the Langlands-Deligne local root number and local Galois Gauss sum. The relationship between the Galois Gauss sum of a character of a group and the Galois Gauss sum of the restriction of that character to a subgroup is examined. In particular a generalization of a theorem of Hasse-Davenport (1934) to the global, non-abelian case is seen to result from the relation between Galois Gauss sums and the adelic resolvents of Fröhlich.
Runge-Kutta methods for third order weak approximation of SDEs with multidimensional additive noise
Creators: name: Debrabant, Kristian
Publisher: name: arXiv
Year: 2009
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65C30, 60H35, 65C20, 68U20

description: A new class of third order Runge-Kutta methods for stochastic differential equations with additive noise is introduced. In contrast to Platen's method, which to the knowledge of the author has been up to now the only known third order Runge-Kutta scheme for weak approximation, the new class of methods affords less random variable evaluations and is also applicable to SDEs with multidimensional noise. Order conditions up to order three are calculated and coefficients of a four stage third order method are given. This method has deterministic order four and minimized error constants, and needs in addition less function evaluations than the method of Platen. Applied to some examples, the new method is compared numerically with Platen's method and some well known second order methods and yields very promising results.
description: Two further examples added, small corrections
Produktstatistikken 2017
Creators: Danmarks Statistik
Publisher: name: Rigsarkivet
Year: 2022

description: Formålet med serviceydelser er at bidrage med ny information om servicesektoren og dens aktivitetsområder. Derudover anvendes serviceydelser i nationalregnskabet samt indgår i den løbende brancherevidering af Det Erhvervsstatistiske Register.
Polymer Quantum Dynamics of the Taub Universe
Creators: name: Battisti, Marco Valerio
name: Lecian, Orchidea Maria
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Within the framework of non-standard (Weyl) representations of the canonical commutation relations, we investigate the polymer quantization of the Taub cosmological model. The Taub model is analyzed within the Arnowitt-Deser-Misner reduction of its dynamics, by which a time variable arises. While the energy variable and its conjugate momentum are treated as ordinary Heisenberg operators, the anisotropy variable and its conjugate momentum are represented by the polymer technique. The model is analyzed at both classical and quantum level. As a result, classical trajectories flatten with respect to the potential wall, and the cosmological singularity is not probabilistically removed. In fact, the dynamics of the wave packets is characterized by an interference phenomenon, which, however, is not able to stop the evolution towards the classical singularity.
description: 12 pages, 6 figures; published version
Optimal operation of feedback flashing ratchets
Creators: name: Feito, M.
name: Cao, F. J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Feedback flashing ratchets are thermal rectifiers that use information on the state of the system to operate the switching on and off a periodic potential. We discuss different strategies for this operation with the aim of maximizing the net flux of particles in the collective version of a flashing ratchet consisting on N overdamped Brownian particles. We show the optimal protocols for the one-particle ratchet and for the collective ratchet with an infinite number of particles. Finally we comment on the unsolved problem of the optimal strategy for any other number of particles.
description: LaTeX, 5 pages, 2 figures. Presented at the 5th International Conference on Unsolved Problems on Noise (UPON'08). Selected to appear in Journal of Statistical Mechanics (JSTAT)
Regnskabsstatistik for akvakultur 2017
Creators: Danmarks Statistik
Publisher: name: Rigsarkivet
Year: 2022

description: Formålet med Regnskabsstatistik for Akvakultur er at belyse økonomien i dansk fiskeopdræt. Herudover er regnskabsstatistikken et input til opgørelsen af nationalregnskabet og til indberetninger til EU. Baggrunden for Regnskabsstatistik for Akvakultur er et ønske om, at der udarbejdes en regnskabsstatistik for akvakultur til brug for akvakulturerhvervets udøvere, Dansk Akvakultur, Fødevareministeriet samt andre interessenter.
Udenrigshandel med varer 2015
Creators: Danmarks Statistik
Publisher: name: Rigsarkivet
Year: 2022

description: Registrets formål er at belyse Danmarks varehandel med andre lande. Registret er forordningsbelagt.
Data anvendes bla, af diverse offentlige myndigheder som led i det nødvendige beslutningsgrundlag. Derudover anvendes de af en lang række private organisationer, firmaer mm. De detaljerede data anvendes desuden til forskning mm.
Fine-tuning favors mixed axion/axino cold dark matter over neutralinos in the minimal supergravity model
Creators: name: Baer, Howard
name: Box, Andrew D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Over almost all of minimal supergravity (mSUGRA or CMSSM) model parameter space, there is a large overabundance of neutralino cold dark matter (CDM). We find that the allowed regions of mSUGRA parameter space which match the measured abundance of CDM in the universe are highly fine-tuned. If instead we invoke the Peccei-Quinn-Weinberg-Wilczek solution to the strong CP problem, then the SUSY CDM may consist of an axion/axino admixture with an axino mass of order the MeV scale, and where mixed axion/axino or mainly axion CDM seems preferred. In this case, fine-tuning of the relic density is typically much lower, showing that axion/axino CDM (a\tilde{a}CDM) is to be preferred in the paradigm model for SUSY phenomenology. For mSUGRA with a\tilde{a}CDM, quite different regions of parameter space are now DM-favored as compared to the case of neutralino DM. Thus, rather different SUSY signatures are expected at the LHC in the case of mSUGRA with a\tilde{a}CDM, as compared to mSUGRA with neutralino CDM.
description: 23 pages with 17 .eps figures
Interference effects in transport across a single incompressible strip at the edge of the fractional quantum Hall system
Creators: name: Deviatov, E. V.
name: Marquardt, B.
name: Lorke, A.
name: Biasiol, G.
name: Sorba, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We experimentally investigate interference effects in transport across a single incompressible strip at the edge of the quantum Hall system by using a Fabry-Perot type interferometer. We find the interference oscillations in transport across the incompressible strips with local filling factors $ν_c=1, 4/3, 2/3$ even at high imbalances, exceeding the spectral gaps. In contrast, there is no sign of the interference in transport across the principal Laughlin $ν_c=1/3$ incompressible strip. This indicates, that even at fractional $ν_c$, the interference effects are caused by "normal" electrons. The oscillation's period is determined by the effective interferometer area, which is sensitive to the filling factors because of screening effects.
description: Final version. To appear in PRB
Stochastic resetting and first arrival subjected to Gaussian noise and Poisson white noise
Creators: name: Goswami, Koushik
name: Chakrabarti, Rajarshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the dynamics of an overdamped Brownian particle subjected to Poissonian stochastic resetting in a nonthermal bath, characterized by a Poisson white noise and a Gaussian noise. Applying the renewal theory we find an exact analytical expression for the spatial distribution at the steady state. Unlike the single exponential distribution as observed in the case of a purely thermal bath, the distribution is double exponential. Relaxation of the transient spatial distributions to the stationary one, for the limiting cases of Poissonian rate, is investigated carefully. In addition, we study the first-arrival properties of the system in the presence of a delta-function sink with strength $κ$, where $κ=0$ and $κ=\infty$ correspond to fully nonreactive and fully reactive sinks, respectively. We explore the effect of two competitive mechanisms: the diffusive spread in the presence of two noises and the increase in probability density around the initial position due to stochastic resetting. We show that there exists an optimal resetting rate, which minimizes the mean first-arrival time (MFAT) to the sink for a given value of the sink strength. We also explore the effect of the strength of the Poissonian noise on MFAT, in addition to sink strength. Our formalism generalizes the diffusion-limited reaction under resetting in a nonequilibrium bath and provides an efficient search strategy for a reactant to find a target site, relevant in a range of biophysical processes.
Charging Induced Emission of Neutral Atoms from NaCl Nanocube Corners
Creators: name: Ceresoli, Davide
name: Zykova-Timan, Tatyana
name: Tosatti, Erio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Detachment of neutral cations/anions from solid alkali halides can in principle be provoked by donating/subtracting electrons to the surface of alkali halide crystals, but generally constitutes a very endothermic process. However, the amount of energy required for emission is smaller for atoms located in less favorable positions, such as surface steps and kinks. For a corner ion in an alkali halide cube the binding is the weakest, so it should be easier to remove that atom, once it is neutralized. We carried out first principles density functional calculations and simulations of neutral and charged NaCl nanocubes, to establish the energetics of extraction of neutralized corner ions. Following hole donation (electron removal) we find that detachment of neutral Cl corner atoms will require a limited energy of about 0.8 eV. Conversely, following the donation of an excess electron to the cube, a neutral Na atom is extractable from the corner at the lower cost of about 0.6 eV. Since the cube electron affinity level (close to that a NaCl(100) surface state, which we also determine) is estimated to lie about 1.8 eV below vacuum, the overall energy balance upon donation to the nanocube of a zero energy electron from vacuum will be exothermic. The atomic and electronic structure of the NaCl(100) surface, and of the nanocube Na and Cl corner vacancies are obtained and analyzed as a byproduct.
description: 16 pages, 2 table, 7 figures
Extended gaussian ensemble solution and tricritical points of a system with long-range interactions
Creators: name: Frigori, Rafael B.
name: Rizzi, Leandro G.
name: Alves, Nelson A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The gaussian ensemble and its extended version theoretically play the important role of interpolating ensembles between the microcanonical and the canonical ensembles. Here, the thermodynamic properties yielded by the extended gaussian ensemble (EGE) for the Blume-Capel (BC) model with infinite-range interactions are analyzed. This model presents different predictions for the first-order phase transition line according to the microcanonical and canonical ensembles. From the EGE approach, we explicitly work out the analytical microcanonical solution. Moreover, the general EGE solution allows one to illustrate in details how the stable microcanonical states are continuously recovered as the gaussian parameter $γ$ is increased. We found out that it is not necessary to take the theoretically expected limit $γ\to \infty$ to recover the microcanonical states in the region between the canonical and microcanonical tricritical points of the phase diagram. By analyzing the entropy as a function of the magnetization we realize the existence of unaccessible magnetic states as the energy is lowered, leading to a treaking of ergodicity.
description: 8 pages, 5 eps figures. Title modified, sections rewritten, tricritical point calculations added. To appear in EPJB
Highly Superlinear Giant Terahertz Photoconductance in GaAs Quantum Point Contacts in the Deep Tunneling Regime
Creators: name: Otteneder, M.
name: Hild, M.
name: Kvon, Z. D.
name: Rodyakina, E. E.
name: Glazov, M. M.
name: Ganichev, S. D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A highly superlinear in radiation intensity photoconductance induced by terahertz laser radiation with moderate intensities has been observed in quantum point contacts made of GaAs quantum wells operating in the deep tunneling regime. For very low values of the normalized dark conductance $G_{\rm dark}/ G_0 \approx 10^{-6}$, with the conductance quantum $G_0=2e^2/h$, the photoconductance scales exponentially with the radiation intensity, so that already at $ 100 \text{ mW}/\text{cm}^2$ it increases by almost four orders of magnitude. This effect is observed for a radiation electric field oriented along the source drain direction. We provide model considerations of the effect and attribute it to the variation of the tunneling barrier height by the radiation field made possible by local diffraction effects. We also demonstrate that cyclotron resonance due to an external magnetic field manifests itself in the photoconductance completely suppressing the photoresponse.
description: 14 pages, 16 figures
Hawking radiation, Entanglement and Teleportation in background of an asymptotically flat static black hole
Creators: name: Pan, Qiyuan
name: Jing, Jiliang
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The effect of the Hawking temperature on the entanglement and teleportation for the scalar field in a most general, static and asymptotically flat black hole with spherical symmetry has been investigated. It is shown that the same "initial entanglement" for the state parameter $α$ and its "normalized partners" $\sqrt{1-α^{2}}$ will be degraded by the Hawking effect with increasing Hawking temperature along two different trajectories except for the maximally entangled state. In the infinite Hawking temperature limit, corresponding to the case of the black hole evaporating completely, the state has no longer distillable entanglement for any $α$. It is interesting to note that the mutual information in this limit equals to just half of the "initially mutual information". It has also been demonstrated that the fidelity of teleportation decreases as the Hawking temperature increases, which just indicates the degradation of entanglement.
description: 17 pages, 3 figures, to be published in Physical Review D
Superchiral hotspots in real chiral plasmonic structures
Creators: name: Gilroy, C.
name: Koyroytsaltis-McQuire, D.
name: Gadegaard, N.
name: Karimullah, A.
name: Kadodwala, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Light scattering from chiral plasmonic structures can create near fields with an asymmetry greater than the equivalent circularly polarised light, a property sometimes referred to as superchirality. These near fields with enhanced chiral asymmetries can be exploited for ultrasensitive detection of chiral (bio)molecules. In this combined experimental and numerical modelling study, we demonstrate that superchiral hot-spots are created around structural heterogeneities, such has protrusions and indentations, possessed by all real metal structures. These superchiral hot-spots, have chiral asymmetries greater than what would be expected from an idealised perfect structure. Our work indicates that surface morphology could play a role in determining the efficacy of a chiral structure for sensing.
Regge Closed String Scattering and its Implication on Fixed angle Closed String Scattering
Creators: name: Lee, Jen-Chi
name: Yang, Yi
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the complete closed string high energy scattering amplitudes (HSA) in the Regge regime for arbitrary mass levels. As an application, we deduce the complete ratios among closed string HSA in the fixed angle regime by using Stirling number identities. These results are in contrast with the incomplete set of closed string HSA in the fixed angle regime calculated previously. The complete forms of the fixed angle amplitudes, and hence the ratios, were not calculable previously without the input of zero-norm state calculation. This is mainly due to the lack of saddle point in the fixed angle closed string calculation.
description: 10 pages. v2: typos corrected
Feynman operator calculus and singular quantum oscillator
Creators: name: Popov, V. S.
name: Trusov, M. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: New applications of Feynman disentangling method in quantum mechanics are studied and the time-dependent singular oscillator problem is solved in this approach. The important role of representation group theory is discussed in this context.
description: 3 pages; RevTeX 4; submited to Phys. Lett. A
Vertex Operators, Grassmannians, and Hilbert Schemes
Creators: name: Carlsson, Erik
Publisher: name: arXiv
Year: 2009
Subjects: subject: Representation Theory (math.RT)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14M15, 17B69

description: We describe a well-known collection of vertex operators on the infinite wedge representation as a limit of geometric correspondences on the equivariant cohomology groups of a finite-dimensional approximation of the Sato grassmannian, by cutoffs in high and low degrees. We prove that locality, the boson-fermion correspondence, and intertwining relations with the Virasoro algebra are limits of the localization expression for the composition of these operators. We then show that these operators are, almost by definition, the Hilbert scheme vertex operators defined by Okounkov and the author in \cite{CO} when the surface is $\mathbb{C}^2$ with the torus action $z\cdot (x,y) = (zx,z^{-1}y)$.
description: 20 pages, 0 figures
SeDyT: A General Framework for Multi-Step Event Forecasting via Sequence Modeling on Dynamic Entity Embeddings
Creators: name: Zhou, Hongkuan
name: Orme-Rogers, James
name: Kannan, Rajgopal
name: Prasanna, Viktor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Temporal Knowledge Graphs store events in the form of subjects, relations, objects, and timestamps which are often represented by dynamic heterogeneous graphs. Event forecasting is a critical and challenging task in Temporal Knowledge Graph reasoning that predicts the subject or object of an event in the future. To obtain temporal embeddings multi-step away in the future, existing methods learn generative models that capture the joint distribution of the observed events. To reduce the high computation costs, these methods rely on unrealistic assumptions of independence and approximations in training and inference. In this work, we propose SeDyT, a discriminative framework that performs sequence modeling on the dynamic entity embeddings to solve the multi-step event forecasting problem. SeDyT consists of two components: a Temporal Graph Neural Network that generates dynamic entity embeddings in the past and a sequence model that predicts the entity embeddings in the future. Compared with the generative models, SeDyT does not rely on any heuristic-based probability model and has low computation complexity in both training and inference. SeDyT is compatible with most Temporal Graph Neural Networks and sequence models. We also design an efficient training method that trains the two components in one gradient descent propagation. We evaluate the performance of SeDyT on five popular datasets. By combining temporal Graph Neural Network models and sequence models, SeDyT achieves an average of 2.4% MRR improvement when not using the validation set and more than 10% MRR improvement when using the validation set.
The notion of convexity and concavity on Wiener space
Creators: name: Feyel, D.
name: Üstünel, A. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60Hxx

description: We define, in the frame of an abstract Wiener space, the notions of convexity and of concavity for the equivalence classes of random variables. As application we show that some important inequalities of the finite dimensional case have their natural counterparts in this setting.
Deep Learning for Breast Cancer Classification: Enhanced Tangent Function
Creators: name: Thapa, Ashu
name: Alsadoon, Abeer
name: Prasad, P. W. C.
name: Bajaj, Simi
name: Alsadoon, Omar Hisham
name: Rashid, Tarik A.
name: Ali, Rasha S.
name: Jerew, Oday D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Background and Aim: Recently, deep learning using convolutional neural network has been used successfully to classify the images of breast cells accurately. However, the accuracy of manual classification of those histopathological images is comparatively low. This research aims to increase the accuracy of the classification of breast cancer images by utilizing a Patch-Based Classifier (PBC) along with deep learning architecture. Methodology: The proposed system consists of a Deep Convolutional Neural Network (DCNN) that helps in enhancing and increasing the accuracy of the classification process. This is done by the use of the Patch-based Classifier (PBC). CNN has completely different layers where images are first fed through convolutional layers using hyperbolic tangent function together with the max-pooling layer, drop out layers, and SoftMax function for classification. Further, the output obtained is fed to a patch-based classifier that consists of patch-wise classification output followed by majority voting. Results: The results are obtained throughout the classification stage for breast cancer images that are collected from breast-histology datasets. The proposed solution improves the accuracy of classification whether or not the images had normal, benign, in-situ, or invasive carcinoma from 87% to 94% with a decrease in processing time from 0.45 s to 0.2s on average. Conclusion: The proposed solution focused on increasing the accuracy of classifying cancer in the breast by enhancing the image contrast and reducing the vanishing gradient. Finally, this solution for the implementation of the Contrast Limited Adaptive Histogram Equalization (CLAHE) technique and modified tangent function helps in increasing the accuracy.
description: 19
Introduction
Creators: name: Schaflechner, Jürgen
name: Kramer, Max
Publisher: name: Dastavezi | The Audio-Visual South Asia
Year: 2022

description: This is the fourth edition of Dastavezi The Audio-Visual South Asia, and we are happy to welcome five authors from India, Pakistan, Sri Lanka, Germany, and the United Kingdom as contributors. Aside from two documentary films and two photo essays, we extend our repertoire to feature a piece by the singer and artist Wajiha Naqvi, who, with the help of one of her audio recordings, reflects on how her embodied practice produces affective atmospheres.
description: Dastavezi | The Audio-Visual South Asia, Vol. 4 (2022):
Magnetic conductivity and Chern-Simons Term in Holographic Hydrodynamics of Charged AdS Black Hole
Creators: name: Matsuo, Yoshinori
name: Sin, Sang-Jin
name: Takeuchi, Shingo
name: Tsukioka, Takuya
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the effects of the Chern-Simons term in the hydrodynamics of the five-dimensional Reissner-Nordstrom-AdS background. We work out the decoupling problem of the equations of motion and calculate the retarded Green functions explicitly. We then find that the Chern-Simons term induces the magnetic conductivity caused by the anomaly effect. It is increasing function of temperature running from a non-zero value at zero temperature to the twice the value at infinite temperature.
description: 19 pages, 2 figures; v2 discussion on classification of perturbation fields based on helicity base, third order in dispersion relation and more discussion on magnetic conductivity are added, some typos are corrected and references are added; v3 published version
An Empirical study of judgment making in groups using qualitative controlled feedback
Creators: name: Ali, Mirza Wazed
Publisher: name: University of British Columbia
Year: 2010

description: This work gives an account of an empirical study on the assessment of judgments of individuals in a group. The phenomenon of judgment or decision making in groups appears in various contexts. However we are interested in situations where each member of a group is required to give independently of other members of the group, his most informed and reasoned judgment on a controversial issue. Nonetheless, it is of interest to gain knowledge about the importance of various judgments about the issue, and also of the arguments (or reasons) put forward by the judges to support their judgments. Such situations of judgmentmaking raise methodological problems for collecting judgmental data, and methods, such as, face-to-face discussion or the Delphi method may not be appropriate. To circumvent this problem, a new method called 'Qualitative Controlled Feedback' (Q.C.F.) was developed by Press [13]. Our aim in the present work is to examine the workings of the method by its application to a real world situation. With this aim, judgments (and other data of interest) were collected, using a three-stage Q.C.F. survey, from a random sample group of Faculty and Staff members of the University of British Columbia on a question related to the issue of whether or not the University should build an Indoor Aquatic Center on the campus. The data was analysed from an exploratory viewpoint. It was observed that qualitative controlled feedback creates a good interaction (in the sense of exchanging arguments and reasons) among the group members. Change in judgment occurred as subjects went from one stage to another after having qualitative feedback of information. By comparing with a control group of subjects, it was also found that qualitative feedback was able to produce more rational judgments than without any feedback. The distributions of judgment obtained in this empirical study bear significant implications for decision making. The distributions were found to be bimodal and represented two opposing groups of thought. Other results involve, regression analysis, transition probabilities of judgment change from one stage to another, analysis of judgment change behavior, importance of reasons, effect of non-response on judgment distributions and analysis of confidence in judgment. Finally, it was found that the method of Qualitative Controlled Feedback can be fruitfully applied to situations of practical interest.
Quantum electrodynamics with self-conjugated equations with spinor wave functions for fermion fields
Creators: name: Neznamov, V. P.
name: Shemarulin, V. E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Physics (physics.gen-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum electrodynamics (QED) with self-conjugated equations with spinor wave functions for fermion fields is considered. In the low order of the perturbation theory, matrix elements of some of QED physical processes are calculated. The final results coincide with cross-sections calculated in the standard QED. The self-energy of an electron and amplitudes of processes associated with determination of the anomalous magnetic moment of an electron and Lamb shift are calculated. These results agree with the results in the standard QED.Distinctive feature of the developed theory is the fact that only states with positive energies are present in the intermediate virtual states in the calculations of the electron self-energy, anomalous magnetic moment of an electron and Lamb shift. Besides, in equations, masses of particle and anti-particles have the opposite signs.
description: 28 pages, 5 figures
An Extended Fatou-Shishikura inequality and wandering branch continua for polynomials
Creators: name: Blokh, Alexander
name: Childers, Doug
name: Levin, Genadi
name: Oversteegen, Lex
name: Schleicher, Dierk
Publisher: name: arXiv
Year: 2010
Subjects: subject: Dynamical Systems (math.DS)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: Primary 37F10, Secondary 37B45, 37C25, 37F20, 37F50

description: Let $P$ be a polynomial of degree $d$ with Julia set $J_P$. Let $\widetilde N$ be the number of non-repelling cycles of $P$. By the famous Fatou-Shishikura inequality $\widetilde N\le d-1$. The goal of the paper is to improve this bound. The new count includes \emph{wandering collections of non-precritical branch continua}, i.e., collections of continua or points $Q_i\subset J_P$ \emph{all} of whose images are pairwise disjoint, contain no critical points, and contain the limit sets of $\mathrm{eval}(Q_i)\ge 3$ external rays. Also, we relate individual cycles, which are either non-repelling or repelling with no periodic rays landing, to individual critical points that are recurrent in a weak sense. A weak version of the inequality reads \[ \widetilde N+N_{irr}+χ+\sum_i (\mathrm{eval}(Q_i)-2) \le d-1 \] where $N_{irr}$ counts repelling cycles with no periodic rays landing at points in the cycle, $\{Q_i\}$ form a wandering collection $\mathcal{B}_\mathbb{C}$ of non-precritical branch continua, $χ=1$ if $\mathcal{B}_\mathbb{C}$ is non-empty, and $χ=0$ otherwise.
description: 66 pages; text expanded and 6 figures added; index; in the new version we added a few more references, corrected typos, and added some explanations; to appear in Advances in Mathematics
PPR-system
Creators: Rødovre Kommune
Publisher: name: Rigsarkivet
Year: 2022

description: Formålet med it-systemet er at samle dokumentation vedr. sagsbehandling, ydelser, intern kommunikation m.v. i forhold til børn i daginstitutioner og skoler, der indstillet til pædagogisk psykologisk vurdering (PPR) grundet faglige eller andre vanskeligheder, og som kan afhjælpes af psykologer, talepædagoger eller konsulenter.
KMD Institution
Creators: Glostrup Kommune
Herlev Kommune
Albertslund Kommune
Høje-Taastrup Kommune
Rødovre Kommune
Vallensbæk Kommune
Allerød Kommune
Fredensborg Kommune
Hillerød Kommune
Halsnæs Kommune
Solrød Kommune
Odsherred Kommune
Kalundborg Kommune
Ringsted Kommune
Stevns Kommune
Sorø Kommune
Lejre Kommune
Vordingborg Kommune
Faaborg-Midtfyn Kommune
Kerteminde Kommune
Nyborg Kommune
Svendborg Kommune
Nordfyns Kommune
Langeland Kommune
Ærø Kommune
Fanø Kommune
Varde Kommune
Fredericia Kommune
Holstebro Kommune
Lemvig Kommune
Norddjurs Kommune
Favrskov Kommune
Odder Kommune
Samsø Kommune
Skanderborg Kommune
Ikast-Brande Kommune
Ringkøbing-Skjern Kommune
Morsø Kommune
Viborg Kommune
Brønderslev Kommune
Vesthimmerlands Kommune
Rebild Kommune
Jammerbugt Kommune
Publisher: name: Rigsarkivet
Year: 2022

description: KMD Institution muliggør den kommunale forvaltning af institutionsområdet for børn (Dagpleje, Vuggestuer, Børnehaver og Fritidshjem).
Naveena Camera
Creators: name: Buthpitiya, Vindhya
Publisher: name: Dastavezi | The Audio-Visual South Asia
Year: 2022

description: This visual essay explores the daily life and rhythms of a photography studio in Jaffna in northern Sri Lanka. Here, I reflect on the enduring entanglements of war and everyday image-making practices in the postwar period. The accompanying visuals cast the studio space as one of stillness and movement, where photography exists as an act of communal production and aspiration in a setting marked by political unrest and inequity. Even as advancements in technology and digital photography have further allowed the studio to be integrated into the surveillance, security, and documentation regimes of the state and state-like actors, the work of studio photographers positions them as the determined arbiters of their clients’ anticipated futures. The day-to-day routines of studios reflected the lingering effects of war on aspirations for citizenship. When taken together with the possibilities for mobility that are afforded by the Tamil community’s displacement and dispersal, as caused by conflict, the role of photography in realizing these hopes becomes apparent.
description: Dastavezi | The Audio-Visual South Asia, Vol. 4 (2022):
Probing gluon helicity with heavy flavor at the EIC
Creators: name: Anderle, Daniele Paolo
name: Dong, Xin
name: Hekhorn, Felix
name: Kelsey, Matthew
name: Radhakrishnan, Sooraj
name: Sichtermann, Ernst
name: Xia, Lei
name: Xing, Hongxi
name: Yuan, Feng
name: Zhao, Yuxiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We propose a new measurement of the heavy flavor hadron double spin asymmetry in deep-inelastic scattering at a future Electron-Ion Collider (EIC) to constrain the polarized gluon distribution function inside the proton. Statistical projection on $D^0$ meson double spin asymmetry is calculated with an EIC central detector using an all-silicon tracker and vertexing subsystem. A first impact study was done by interpreting pseudo-data at next-to-leading order in QCD. The sensitivity of the experimental observable in constraining gluon helicity distribution in a wide range of parton momentum fraction $x$ has been investigated considering different beam energy configurations. This measurement complements the inclusive spin-dependent structure function measurement and provides an opportunity to constrain the gluon helicity distribution in the moderate $x$ region.
description: 10 pages, 9 figures
Una introducción a la inteligencia artificial
Creators: name: García-Peñalvo, F. J.
Publisher: name: Zenodo
Year: 2019
Subjects: Inteligencia artificial; Machine learning

description: Clase del módulo de Ingeniería Informática en el Itinerario “Ciencias Puras” de la Universidad de la Experiencia de la Universidad de Salamanca, impartida el 23 de mayo de 2019 en la Facultad de Geografía e Historia, Universidad de Salamanca. Se presenta una introducción a la inteligencia artificial.
Additional file 2 of Identification of immune cell infiltration and effective biomarkers of polycystic ovary syndrome by bioinformatics analysis
Creators: name: Gao, Mengge
name: Liu, Xiaohua
name: Du, Mengxuan
name: Gu, Heng
name: Xu, Hang
name: Zhong, Xingming
Publisher: name: figshare
Year: 2023
Subjects: subject: Immunology
subject: FOS: Clinical medicine

description: Additional file 2: Supplementary Figures
Estimation of aperture of the Tunka-Rex radio array for cosmic-ray air-shower measurements
Creators: name: Lenok, V.
name: Bezyazeekov, P. A.
name: Budnev, N.
name: Fedorov, O.
name: Gress, O.
name: Grishin, O.
name: Haungs, A.
name: Huege, T.
name: Kazarina, Y.
name: Kleifges, M.
name: Korosteleva, E.
name: Kostunin, D.
name: Kuzmichev, L.
name: Lubsandorzhiev, N.
name: Malakhov, S.
name: Marshalkina, T.
name: Monkhoev, R.
name: Osipova, E.
name: Pakhorukov, A.
name: Pankov, L.
name: Prosin, V.
name: Schröder, F. G.
name: Shipilov, D.
name: Zagorodnikov, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The recent progress in the radio detection technique for air showers paves the path to future cosmic-ray radio detectors. Digital radio arrays allow for a measurement of the air-shower energy and depth of its maximum with a resolution comparable to those of the leading optical detection methods. One of the remaining challenges regarding cosmic-ray radio instrumentation is an accurate estimation of their efficiency and aperture. We present a probabilistic model to address this challenge. We use the model to estimate the efficiency and aperture of the Tunka-Rex radio array. The basis of the model is a parametrization of the radio footprint and a probabilistic treatment of the detection process on both the antenna and array levels. In this way, we can estimate the detection efficiency for air showers as function of their arrival direction, energy, and impact point on the ground. In addition, the transparent internal relationships between the different stages of the air-shower detection process in our probabilistic approach enable to estimate the uncertainty of the efficiency and, consequently, of the aperture of radio arrays. The details of the model will be presented in the contribution.
description: Proceedings of the 37th International Cosmic Ray Conference (ICRC2021), 12-23 July 2021, Berlin, Germany - Online
Mechanism of entanglement preservation
Creators: name: Tong, Qing-Jun
name: An, Jun-Hong
name: Luo, Hong-Gang
name: Oh, C. H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the entanglement preservation of two qubits locally interacting with their reservoirs. We show that the existence of a bound state of the qubit and its reservoir and the non-Markovian effect are two essential ingredients and their interplay plays a crucial role in preserving the entanglement in the steady state. When the non-Markovian effect is neglected, the entanglement sudden death (ESD) is reproduced. On the other hand, when the non-Markovian is significantly strong but the bound state is absent, the phenomenon of the ESD and its revival is recovered. Our formulation presents a unified picture about the entanglement preservation and provides a clear clue on how to preserve the entanglement in quantum information processing.
description: 6 pages, 6 figures. To appear in Phys. Rev. A
Symmetric topological complexity of projective and lens spaces
Creators: name: Gonzalez, Jesus
name: Landweber, Peter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 55M30, 57R40

description: For real projective spaces, (a) the Euclidean immersion dimension, (b) the existence of axial maps, and (c) the topological complexity are known to be three facets of the same problem. But when it comes to embedding dimension, the classical work of Berrick, Feder and Gitler leaves a small indeterminacy when trying to identify the existence of Euclidean embeddings of these manifolds with the existence of symmetric axial maps. As an alternative we show that the symmetrized version of (c) captures, in a sharp way, the embedding problem. Extensions to the case of even torsion lens spaces and complex projective spaces are discussed.
description: Paper reorganized for clarity in exposition
title: X-ray properties of mJy Radio Galaxies
title: [Old:] The nature of mJy Radio Galaxies: the study of the relation between jet and accretion disk properties
titleType: Other
Creators: name: Torbaniuk, Olena
Publisher: name: Zenodo
Year: 2024

description: Radio galaxies in the local Universe display diverse extended radio morphologies, optical spectra, and host galaxy properties, which as suggested by studies could arise from intrinsic differences in central SMBH parameters or jet content, or be extrinsically driven by the host galaxy and environmental properties. While research in this field has predominantly focused on the population of the brightest radio galaxies (e.g. 3CR and 2Jy catalogs with flux limits of Jy), the results remain inconclusive and do not definitively support any of the proposed hypotheses. Moreover, recent studies of less powerful mJy radio galaxies have introduced additional complexity, revealing more compact radio structures compared to their brighter counterparts.

In this work, we present the first comprehensive X-ray analysis for a sample of mJy radio galaxies combining optical data from SDSS DR7 and radio observations from NRAO FIRST and NVSS surveys. This extends the study of the radio morphology-accretion mode link, previously examined for Jy radio galaxies, to lower radio powers. We complemented the sample with X-ray data from Chandra, which allows to probe the SMBH accretion properties and processes fueling it at sub-pc/pc scales, and the thermal environments potentially responsible for change of radio morphologies at kpc scales.
The Classical-Map Hyper-Netted-Chain (CHNC) technique for inhomogeneous electron systems. Application to quantum dots
Creators: name: Dharma-wardana, M. W. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Classical-map Hyper-Netted-Chain (CHNC) technique is a simple method of calculating quantum pair-distribution functions, spin-dependent energies, etc., of strongly-interacting {\it uniform} systems. We present CHNC calculations of charge densities and energies of {\it non-uniform} systems, viz., quantum dots, and compare with quantum Monte Carlo and density -functional results. Results for up to 210 electrons are reported.
description: Latex manuscript and one figure (colour online). New calculations extending to 210 electrons are included
title: Investigations on ballastless tracks in tunnel without reinforcement
Creators: name: Liu, Jia
name: Freudenstein, Stephan
Publisher: name: UNSPECIFIED
Year: 2024

description: Ballastless track systems have delivered an optimal performance in the past decades. This ideal comes from the Continuously Reinforced Concrete Pavement or the Jointed Plain Concrete Pavement in road design. It can be deduced that a well-proved system for road pavement is applicable to ballastless track design after certain modifications, which could save materials and simplify the construction work as well. In this paper, a feasibility study of ballastless track forms, in which neither reinforcement nor dowel bars shall be applied have been investigated using Finite Element Analysis. The results show that this idea is feasible in long tunnel with hard and stabile substructure, if a joint spacing less than 4 m can be realized. Meanwhile, these kinds of systems cannot be applied for track with soft substructures such as mass-spring-systems, in which continuous double-layer-reinforcement and sufficient thickness of the track concrete layer are required.
Functions on surfaces and incompressible subsurfaces
Creators: name: Maksymenko, Sergiy
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geometric Topology (math.GT)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 37C05, 57S05, 57R45

description: Let $M$ be a smooth connected compact surface and $P$ be either a real line or a circle. This paper proceeds the study of the stabilizers and orbits of smooth functions on $M$ with respect to the right action of the group of diffeomorphisms of $M$. A large class of smooth maps $f:M\to P$ with isolated singularities is considered and it is shown that the general problem of calculation of the fundamental group of the orbit of $f$ reduces to the case when the Euler characteristic of $M$ is non-negative. For the proof of main result incompressible subsurfaces and cellular automorphisms of surfaces are investigated.
description: This is an improved version of the second part of my paper arXiv:0806.4704 which is currently removed from arXiv:0806.4704. 23 pages, 5 figures
Topics on noncommutative localization and group rings
Creators: name: Lee, Kit-Sum
Publisher: name: University of British Columbia
Year: 2010

description: Three topics in localization theory and group ring theory are investigated. In Chapter I, it is proved that every symmetric kernel functor in a left Noetherian ring is induced by a prime ideal. A sufficient condition for the ring of quotients with respect to a prime kernel functor to be semi-simple Artinian is found. &n analogous result for guasi-prime kernel functors is obtained in Section 5. In Chapter II, the idea of controlling subgroups is applied to group ring localization. Some sufficient conditions for the descent of the maximal ring of quotients and of the classical ring of quotients are obtained in Section 8. In Chapter III, characterizations of group rings, over nilpotent groups of transfinitely bounded cardinality, whose left global dimension is finite are obtained. As an application, this homological result is used to get information on the torsion elements of an M-group.
Lanka – The Other Side of War and Peace
Creators: name: Fatima, Iffat
Publisher: name: Dastavezi | The Audio-Visual South Asia
Year: 2022

description: This essay, elaborates on the process of making the film Lanka: The Other Side of War and Peace. On the one hand, it discusses the intricacies of memory and reconciliation in the context of the Sri Lankan Conflict from the film maker's personal recollection. On the other hand, it provides a glimpse into the film's political aesthetics, camera work, protagonists, audience, and the conceptualization of the power of documentary film to open our collective imagination and create empathy.
description: Dastavezi | The Audio-Visual South Asia, Vol. 4 (2022):
Neon and oxygen in low activity stars: towards a coronal unification with the Sun
Creators: name: Robrade, J.
name: Schmitt, J. H. M. M.
name: Favata, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The disagreement between helioseismology and a recent downward revision of solar abundances has resulted in a controversy about the true neon abundance of the Sun and other stars. We investigated XMM-Newton and Chandra high-resolution X-ray spectra of weakly and moderately active stars (log L_x/L_bol = -5...-7) and determined their coronal Ne/O abundance ratio by using two linear combinations of strong emission lines as well as a global-fitting method. The sample stars show a correlation between their Ne/O ratio and stellar activity in the sense that stars with a higher activity level show a higher Ne/O ratio. We find that the Ne/O ratio decreases in our sample from values of Ne/O~0.4 down to Ne/O~0.2, suggesting that ratios similar to 'classical' solar values are rather common for low activity stars. A significantly enhanced neon abundance as the solution to the solar modeling problem seems unlikely. We find no indications of a peculiar position of the Sun among other stars.
description: Accepted for publication in A&A, 8 pages, 5 figures