cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Stable pairs with descendents on local surfaces I: the vertical component
Creators: name: Kool, M.
name: Thomas, R. P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14N35

description: We study the full stable pair theory --- with descendents --- of the Calabi-Yau 3-fold $X=K_S$, where $S$ is a surface with a smooth canonical divisor $C$.
 By both $\mathbb C^*$-localisation and cosection localisation we reduce to stable pairs supported on thickenings of $C$ indexed by partitions. We show that only strict partitions contribute, and give a complete calculation for length-1 partitions. The result is a surprisingly simple closed product formula for these "vertical" thickenings.
 This gives all contributions for the curve classes $[C]$ and $2[C]$ (and those which are not an integer multiple of the canonical class). Here the result verifies, via the descendent-MNOP correspondence, a conjecture of Maulik-Pandharipande, as well as various results about the Gromov-Witten theory of $S$ and spin Hurwitz numbers.
description: 51 pages, 2 Young diagrams. Appendix by Aaron Pixton and Don Zagier. Published version
Stellar Populations and the Star Formation Histories of LSB Galaxies: I. Optical and H-alpha Imaging
Creators: name: Schombert, James
name: Maciel, Tamela
name: McGaugh, Stacy
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: This paper presents optical and H-alpha imaging for a large sample of LSB galaxies selected from the PSS-II catalogs (Schombert et. al 1992). As noted in previous work, LSB galaxies span a range of luminosities (-10 > M_V > -20) and sizes (0.3 kpc < R_V25 < 10 kpc), although they are consistent in their irregular morphology. Their H-alpha luminosities (L(H-alpha) range from 10^36 to 10^41 ergs s^-1 (corresponding to a range in star formation, using canonical prescriptions, from 10^-5 to 1 M_solar yr^-1). Although their optical colors are at the extreme blue edge for galaxies, they are similar to the colors of dwarf galaxies (van Zee 2001) and gas-rich irregulars (Hunter & Elmegreen 2006). However, their star formation rates per unit stellar mass are a factor of ten less than other galaxies of the same baryonic mass, indicating that they are not simply quiescent versions of more active star forming galaxies. This paper presents the data, reduction techniques and new philosophy of data storage and presentation. Later papers in this series will explore the stellar population and star formation history of LSB galaxies using this dataset.
description: 33 pages, 17 figures, 2 tables, accepted for Advances in Astronomy/Hindawi
Quantitative phase reconstruction for orthogonal-scanning differential phase-contrast optical coherence tomography
Creators: name: Heise, Bettina
name: Stifter, David
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present differential phase-contrast optical coherence tomography (DPC-OCT) with two transversally separated probing beams to sense phase gradients in various directions by employing a rotatable Wollaston prism. In combination with a two-dimensional mathe- matical reconstruction algorithm based on a regularized shape from shading (SfS) method accurate quantitative phase maps can be determined from a set of two orthogonal en-face DPC-OCT images, as exemplified on various technical samples.
description: 4 pages, 4 figures
Krivosheinoscopus bartai Jezek 2004
Creators: name: Tkoč, Michal
name: Pecharová, Martina
name: Ježek, Jan
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Krivosheinoscopus
Krivosheinoscopus bartai

description: Krivosheinoscopus bartai Ježek, 2004
(http://www.morphbank.net/?id=840042)
 Krivosheinoscopus bartai Ježek, 2004b: 117, Figs 17–30.
The holotype is deposited in NMPC:
 HOLOTYPE (J): ‘Czech / Republic / Bohemia or., Železné / hory Mts PLA, / Lichnice – Kaňkovy / hory Mts NNR (6159), / 22. v. 2000, Bárta / leg., MT / 12318 / spring area with clear / fissure waters / (western slopes of / Kaňkovy hory Mts, / 385 m a. s. l., acid / beechwood [p] // Krivosheinoscopus / bartai / Ježek, 2004 / male / HOLOTYPE / Cat. No. 34243 / J. Ježek det. / 2004 [p, red label]’.
 Current status. Valid species.
description: Published as part of Tkoč, Michal, Pecharová, Martina & Ježek, Jan, 2014, Catalogue of the type specimens of Diptera deposited in the Department of Entomology, National Museum, Prague, Czech Republic *, pp. 789-837 in Acta Entomologica Musei Nationalis Pragae 54 (2) on page 804, DOI: 10.5281/zenodo.5300543
Recoiling black holes: electromagnetic signatures, candidates, and astrophysical implications
Creators: name: Komossa, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Supermassive black holes (SMBHs) may not always reside right at the centers of their host galaxies. This is a prediction of numerical relativity simulations, which imply that the newly formed single SMBH, after binary coalescence in a galaxy merger, can receive kick velocities up to several 1000 km/s due to anisotropic emission of gravitational waves. Long-lived oscillations of the SMBHs in galaxy cores, and in rare cases even SMBH ejections from their host galaxies, are the consequence. Observationally, accreting recoiling SMBHs would appear as quasars spatially and/or kinematically off-set from their host galaxies. The presence of the "kicks" has a wide range of astrophysical implications which only now are beginning to be explored, including consequences for black hole and galaxy assembly at the epoch of structure formation, black hole feeding, and unified models of Active Galactic Nuclei (AGN). Here, we review the observational signatures of recoiling SMBHs and the properties of the first candidates which have emerged, including follow-up studies of the candidate recoiling SMBH of SDSSJ092712.65+294344.0.
description: 10 pages, Advances in Astronomy 2012, one chapter of the special issue "Seeking for the Leading Actor on the Cosmic Stage: Galaxies versus Supermassive Black Holes"
Exploring serious games for stroke rehabilitation: a scoping review
Creators: name: Mubin, Omar
name: Alnajjar, Fady
name: Mahmud, Abdullah Al
name: Jishtu, Nalini
name: Alsinglawi, Belal
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Aims and Objectives: Stroke is the main cause of long-term disability and happens mostly in the older population. Stroke affected patients experience either of the cognitive, visual or motor losses and recovery requires time and patience as they have to do physical exercises every day and at times repetitively. There are various types of stroke rehabilitation exercises focussing on technological solutions that include therapies performed using games. Motion-based games are popular in encouraging participants to perform repetitive tasks without being getting bored. Therefore, in this study, we have explored studies that included the use of games for stroke rehabilitation to understand the design principles and characteristics of the games used for these purposes. Method: A number of medical respositories were searched for relevant articles in a window of 2008-2018. 18 studies were chosen for the scoping review depending on the inclusion criteria, and design principles used in these studies are analysed and evaluated. Results and Conclusion: We present main findings from our review concerning the attributes of existing games for stroke rehabilitation such as meaningful play, handling of failures, emphasising challenge, and the value of feedback. We conclude with a list of design recommendations that future serious game developers can consider while designing interfaces for stroke patients.Implications for RehabilitationThis review exhibits that the usage of gaming technologies is a very effective interactive mechanism for stroke based rehabilitation.Further our review also shows that serious games provide an avenue and opportunity for customized and highly contextualized gameplayOur review also suggests that effective features to incorporate into serious games for rehabilitation includes; facilitating challenge and recovery from errors. This review exhibits that the usage of gaming technologies is a very effective interactive mechanism for stroke based rehabilitation. Further our review also shows that serious games provide an avenue and opportunity for customized and highly contextualized gameplay Our review also suggests that effective features to incorporate into serious games for rehabilitation includes; facilitating challenge and recovery from errors.
On the $\infty$-categorical Whitehead theorem and the embedding of quasicategories in prederivators
Creators: name: Arlin, Kevin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: We show that small quasicategories embed, both simplicially and 2-categorically, into prederivators defined on arbitrary small categories, so that in some senses prederivators can serve as a model for $(\infty,1)$-categories. The result for quasicategories that are not necessarily small, or analogously for small quasicategories when mapped to prederivators defined only on finite categories, is not as strong. We prove, instead, a Whitehead theorem that prederivators (defined on any domain) detect equivalences between arbitrarily large quasicategories.
description: 19 pages
Violation of the zeroth law of thermodynamics for a non-ergodic interaction
Creators: name: Gaveau, B.
name: Schulman, L. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The phenomenon described by our title should surprise no one. What may be surprising though is how easy it is to produce a quantum system with this feature; moreover, that system is one that is often used for the purpose of showing how systems equilibrate. The violation can be variously manifested. In our detailed example, bringing a detuned 2-level system into contact with a monochromatic reservoir does not cause it to relax to the reservoir temperature; rather, the system acquires the reservoir's level-occupation-ratio.
Krivosheinoscopus ussuricus Jezek 2001
Creators: name: Tkoč, Michal
name: Pecharová, Martina
name: Ježek, Jan
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Krivosheinoscopus
Krivosheinoscopus ussuricus

description: Krivosheinoscopus ussuricus Ježek, 2001
(http://www.morphbank.net/?id=840043)
 Krivosheinoscopus ussuricus Ježek, 2001b: 57, Figs 17–30.
The holotype and four paratypes are deposited in NMPC:
HOLOTYPE (J): ‘ Russia / Far East, Primorye / Region, Ussurian Nat. / Res. (40 km out of / Ussurijsk), / Suputinskij, tunnel, / 21. 4. 1969, / 9750 / Krivosheina leg.[p] // Krivosheinoscopus / ussuricus Ježek, / 2001 / male / holotype / Cat. No. 33852 / 2001 [p, red label]’.
PARATYPES (4 JJ): ‘ Russia / Far East, Primorye / Region, Ussurian Nat. / Res. (40 km out of / Ussurijsk), / Suputinskij, tunnel, / 21. 4. 1969, / 9751 [9751–9754] / Krivosheina leg. [p] // Krivosheinoscopus / ussuricus Ježek, / 2001 / male / paratype / Cat. No. 33853 [33853–33856] / 2001 [p, red label]’.
 Current status. Valid species.
description: Published as part of Tkoč, Michal, Pecharová, Martina & Ježek, Jan, 2014, Catalogue of the type specimens of Diptera deposited in the Department of Entomology, National Museum, Prague, Czech Republic *, pp. 789-837 in Acta Entomologica Musei Nationalis Pragae 54 (2) on pages 804-805, DOI: 10.5281/zenodo.5300543
Virtual refinements of the Vafa-Witten formula
Creators: name: Göttsche, Lothar
name: Kool, Martijn
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: High Energy Physics - Theory (hep-th)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 14D20, 14D21, 14J60, 14J80, 14J81

description: We conjecture a formula for the generating function of virtual $χ_y$-genera of moduli spaces of rank 2 sheaves on arbitrary surfaces with holomorphic 2-form. Specializing the conjecture to minimal surfaces of general type and to virtual Euler characteristics, we recover (part of) a formula of C. Vafa and E. Witten.
 These virtual $χ_y$-genera can be written in terms of descendent Donaldson invariants. Using T. Mochizuki's formula, the latter can be expressed in terms of Seiberg-Witten invariants and certain explicit integrals over Hilbert schemes of points. These integrals are governed by seven universal functions, which are determined by their values on $\mathbb{P}^2$ and $\mathbb{P}^1 \times \mathbb{P}^1$. Using localization we calculate these functions up to some order, which allows us to check our conjecture in many cases.
 In an appendix by H. Nakajima and the first named author, the virtual Euler characteristic specialization of our conjecture is extended to include $μ$-classes, thereby interpolating between Vafa-Witten's formula and Witten's conjecture for Donaldson invariants.
description: 44 pages. Published version. Appendix C by first named author and H. Nakajima
"my spowse most specyally": late medieval mystical unions and the morality play wisdom
Creators: name: Becze, Ayn
Publisher: name: University of Calgary
Year: 2004

description: Bibliography: p. 135-140
description: The East Anglian morality play Wisdom resides in two important manuscripts of fifteenth-century medieval drama—the Folger MS.V.a.354 (Macro plays) and Digby 133 (Digby plays). These manuscripts have been connected with Bury St. Edmunds, a town governed by a large Benedictine monastery, and Wisdom itself seems to have originated there since it reflects the unique governing structure of the borough that accommodated the intersection of lay and religious interests. The drama is an emblematic, sophisticated and liturgically-influenced masque depicting the contest between Wisdom (Christ) and Lucifer over the human soul, Anima. Because the iconography associated with the soul draws on the mystical writing of late fourteenth-century England, a period which witnessed at once the flourishing of vernacular religious writing and its subsequent interdiction with Archbishop Arundel's 1409 Constitutions, this thesis examines Wisdom's position in relation to that period's cultural debates concerning vernacular theology and religious practice. By investigating how this text is a derivative of that tradition, this study aims to explore some of the ramifications of the Constitutions, to illuminate the socio-political climate in which Wisdom was produced, and to highlight the role this vernacular drama played in shaping the religious beliefs and practices of lay and religious men and women.
H8 Model Predictive Control: theory and application
Creators: name: Soos, Antal
Publisher: name: University of Calgary
Year: 2005

description: Bibliography: p. 270-293
description: "Future industrial systems will require control systems to be more reliable, autonomous, robust, and yet efficient. The emphasis of this thesis is to introduce a robust control algo­rithm definition that addresses the needs of future industrial environments. The proposed controller is based on an adaptive concept with a two-step approach. In step one, the sys­tem model is identified in a closed-loop by a robust technique. In step two, the obtained system model from step one is used to formulate a robust controller. The system identification is the central part of the controller design since the controller can only be as good as the model that is used to design it. In order to improve the perfor­mance and robustness of the system identification, this thesis proposes expert system supervised multiple system identifications. The role of the expert system is to periodically evaluate the estimated models and to propose-one for the controller design. The robust controller is formulated by the H00 (sub )optimal design procedure using the proposed system model. The idea behind this controller design technique is to combine an on-line identification algorithm with a control design method that yields a time-varying controller which follows the changing plant. The effectiveness of the proposed robust controller in an industrial environment is demonstrated by simulation and experimental tests. The proposed robust controller as a power system stabilizer has been tested by simulations on a power system model and in the experimental environment using the micro-synchronous generator at the University of Calgary. "
Tides in colliding galaxies
Creators: name: Duc, Pierre-Alain
name: Renaud, Florent
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Long tails and streams of stars are the most noticeable upshots of galaxy collisions. Their origin as gravitational, tidal, disturbances has however been recognized only less than fifty years ago and more than ten years after their first observations. This Review describes how the idea of galactic tides emerged, in particular thanks to the advances in numerical simulations, from the first ones that included tens of particles to the most sophisticated ones with tens of millions of them and state-of-the-art hydrodynamical prescriptions. Theoretical aspects pertaining to the formation of tidal tails are then presented. The third part of the review turns to observations and underlines the need for collecting deep multi-wavelength data to tackle the variety of physical processes exhibited by collisional debris. Tidal tails are not just stellar structures, but turn out to contain all the components usually found in galactic disks, in particular atomic / molecular gas and dust. They host star-forming complexes and are able to form star-clusters or even second-generation dwarf galaxies. The final part of the review discusses what tidal tails can tell us (or not) about the structure and content of present-day galaxies, including their dark components, and explains how tidal tails may be used to probe the past evolution of galaxies and their mass assembly history. On-going deep wide-field surveys disclose many new low-surface brightness structures in the nearby Universe, offering great opportunities for attempting galactic archeology with tidal tails.
description: 46 pages, 13 figures, Review to be published in "Tidal effects in Astronomy and Astrophysics", Lecture Notes in Physics. Comments are most welcome
Branching Dynamics of Viral Information Spreading
Creators: name: Iribarren, José Luis
name: Moro, Esteban
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Despite its importance for rumors or innovations propagation, peer-to-peer collaboration, social networking or Marketing, the dynamics of information spreading is not well understood. Since the diffusion depends on the heterogeneous patterns of human behavior and is driven by the participants' decisions, its propagation dynamics shows surprising properties not explained by traditional epidemic or contagion models. Here we present a detailed analysis of our study of real Viral Marketing campaigns where tracking the propagation of a controlled message allowed us to analyze the structure and dynamics of a diffusion graph involving over 31,000 individuals. We found that information spreading displays a non-Markovian branching dynamics that can be modeled by a two-step Bellman-Harris Branching Process that generalizes the static models known in the literature and incorporates the high variability of human behavior. It explains accurately all the features of information propagation under the "tipping-point" and can be used for prediction and management of viral information spreading processes.
description: 15 pages, 9 figures. Accepted in Physical Review E
Kvazbamormia pskhuensis Jezek 1994
Creators: name: Tkoč, Michal
name: Pecharová, Martina
name: Ježek, Jan
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Kvazbamormia
Kvazbamormia pskhuensis

description: Kvazbamormia pskhuensis Ježek, 1994
(http://www.morphbank.net/?id=840044)
 Kvazbamormia pskhuensis Ježek, 1994a: 55, Figs 1 –15.
The holotype is deposited in NMPC:
HOLOTYPE (J): ‘ SSSR / ABKHAZIA, / Pskhu, / 26. VII. 1988 / Ježek lgt. / 2727 / prameniště, / močály, Fagus, / sev. okraj, Alnus, / potůček, les [hw] // Kvazbamor- / mia pskhuen- / sis Ježek, / 1994 / J / Holotypus / Cat. No. 33602 / Ježek det. / 1988 [hw, red label]’.
 Current status. Valid species.
description: Published as part of Tkoč, Michal, Pecharová, Martina & Ježek, Jan, 2014, Catalogue of the type specimens of Diptera deposited in the Department of Entomology, National Museum, Prague, Czech Republic *, pp. 789-837 in Acta Entomologica Musei Nationalis Pragae 54 (2) on page 805, DOI: 10.5281/zenodo.5300543
Gene expression profiling in enterohemorrhagic escherichia coli
Creators: name: Southward, Carolyn Marie
Publisher: name: University of Calgary
Year: 2004

description: Bibliography: p. 285-300
description: Some pages are in colour.
description: The pathogen Enterohemorrhagic Escherichia coli (EHEC) is a continuing problem in outbreaks associated with contaminated food and water. This study describes the development of a novel high throughput method for monitoring global gene expression in EHEC. The random promoter library is based on a promoter trap method and three reporters lux, gfp and lacZ, were compared for efficacy. The lux reporter system was found to be the best candidate. Random promoter library construction methods were optimized using a partial E. coli MG 1655 library. Subsequently, an EHEC random promoter library was constructed and characterized by assaying gene expression from 3,840 clones under many conditions. Unique expression profiles were observed, the distribution of cloned fragments was random and over-coverage of the genome was indicated by redundancy in the sequencing results. Hierarchical clustering was used to analyze the gene expression data. Co-clustering clones with response profiles unique to certain groups of assay conditions were characterized and sequenced although the results illustrated the difficulties associated with cluster analysis. In contrast, clusters associated with the LEE promoters were well defined and sequence results were classified into groups based on putative function. Gene products associated with response to different cell stresses were represented. Cell wall modifying enzymes were also identified as was miaA, required for tRNA modification and virulence in Shigella. This dataset, including expression profiles in many conditions and sequence information, is a valuable tool and resource for understanding EHEC gene regulation.
Positive-P phase space method simulation in superradiant emission from a cascade atomic ensemble
Creators: name: Jen, H. H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The superradiant emission properties from an atomic ensemble with cascade level configuration is numerically simulated. The correlated spontaneous emissions (signal then idler fields) are purely stochastic processes which are initiated by quantum fluctuations. We utilize the positive-P phase space method to investigate the dynamics of the atoms and counter-propagating emissions. The light field intensities are calculated, and the signal-idler correlation function is studied for different optical depths of the atomic ensemble. Shorter correlation time scale for a denser atomic ensemble implies a broader spectral window needed to store or retrieve the idler pulse.
description: To be published in Phys. Rev. A
The chemical composition of nearby young associations: s-process element abundances in AB Doradus, Carina-Near, and Ursa Major
Creators: name: D'Orazi, Valentina
name: Biazzo, Katia
name: Desidera, Silvano
name: Covino, Elvira
name: Andrievsky, Sergei M.
name: Gratton, Raffaele G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recently, several studies have shown that young, open clusters are characterised by a considerable over-abundance in their barium content. In particular, D'Orazi et al. (2009) reported that in some younger clusters [Ba/Fe] can reach values as high as ~0.6 dex. The work also identified the presence of an anti-correlation between [Ba/Fe] and cluster age. For clusters in the age range ~4.5 Gyr-500 Myr, this is best explained by assuming a higher contribution from low-mass asymptotic giant branch stars to the Galactic chemical enrichment. The purpose of this work is to investigate the ubiquity of the barium over-abundance in young stellar clusters. We analysed high-resolution spectroscopic data, focusing on the s-process elemental abundance for three nearby young associations, i.e. AB Doradus, Carina-Near, and Ursa Major. The clusters have been chosen such that their age spread would complement the D'Orazi et al. (2009) study. We find that while the s-process elements Y, Zr, La, and Ce exhibit solar ratios in all three associations, Ba is over-abundant by ~0.2 dex. Current theoretical models can not reproduce this abundance pattern, thus we investigate whether this unusually large Ba content might be related to chromospheric effects. Although no correlation between [Ba/Fe] and several activity indicators seems to be present, we conclude that different effects could be at work which may (directly or indirectly) be related to the presence of hot stellar chromospheres.
description: Accepted for publication in MNRAS
Factorization, Supersymmetry, Coherent States and Classical Trajectories
Creators: name: Lubo, Musongela
name: Ivan, Kikunga Kasenda
name: Stanislas, Likwolo Katamba
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A generalization of coherent states has been developed in the context of supersymmetric quantum mechanics. For many cases, no link has been made with the corresponding classical system. In this work, we consider simple superpotentials and compare the classical trajectories and the mean values of the position operator in these states. The mean value of the position operator can be written as a power series in time with coefficients whose relations to the superpotential are given in the general case. These coefficients imply integrals and recursion formulas. The method used reproduces exactly what is known for the harmonic oscillator. It is extended to study a family of systems which encompasses the harmonic oscillator. We also consider a third degree superpotential. The time scale after which the mean value of the position operator and the classical trajectory begin differing significantly is evaluated.
 Keywords: Coherent States, SUSYQM.
description: 23 pages 5 figures The paper has been toroughly revised. The use of the SUSY structure is more extensively shown. The saddle point approximation and its validity have been studied in more detail
Nonlinear Schrödinger Equations with Rough Data
Creators: name: Klaus, Friedrich
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2022
Subjects: Nonlinear Schrödinger Equations
Nonlinear Schrödinger Equation
NLS
Derivative Nonlinear Schrödinger Equation
dNLS
Dispersive Equations
Wellposedness
Modulation Spaces
Almost Conserved Quantities

description: In this thesis we consider nonlinear Schrödinger equations with rough initial data. Roughness of the initial data in nonlinear Schrödinger equations can be understood as being of low regularity and as a lack of decay at infinity. Firstly we prove low regularity a priori estimates for the derivative nonlinear Schrödinger equation in Besov spaces with positive regularity index. These a priori estimates are sharp at the level of regularity but are conditional upon small mass. The proof uses the operator determinant characterization of the transmission coefficient introduced by Killip-Visan-Zhang. Secondly we show global wellposedness for the tooth problem of defocusing nonlinear Schrödinger equations, that is the Cauchy problem with initial data in the space $H^{s_1}(\mathbb{R}) + H^{s_2}(\mathbb{T})$. This result can be seen as an intermediate step between the wellposedness theory in the $L^2(\mathbb{T})$-based setting and more generic non-decaying behavior at infinity. In the case $s_1 = 1$ we obtain an at most exponentially growing energy, based on the Hamiltonian of the perturbed equation. For the cubic nonlinearity we may choose $s_2 > 3/2$ whereas for higher power nonlinearities our assumption is $s_2 > 5/2$. Finally we investigate the question of wellposedness of nonlinear Schrödinger equations with initial data in modulation spaces. Modulation spaces $M^s_{p,q}(\mathbb{R}^n)$ encode both regularity ($s$ and $q$) and decay ($p$) in their indices. By making use of multilinear interpolation we prove new local wellposedness results. The local wellposedness results we obtain are proven to be sharp with respect to the regularity index. Moreover we complement the local results by showing global wellposedness in several cases, including low regularity and very slow decay. This is done on the one hand by an extension of techniques developed by Oh-Wang to a broader range of modulation spaces, and on the other hand by applying calculations from Dodson-Soffer-Spencer to the modulation space setting.
Deformations of Fermionic Quantum Field Theories and Integrable Models
Creators: name: Alazzawi, Sabina
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Considering the model of a scalar massive Fermion, it is shown that by means of deformation techniques it is possible to obtain all integrable quantum field theoretic models on two-dimensional Minkowski space which have factorizing S-matrices corresponding to two-particle scattering functions S_2 satisfying S_2(0) = -1. Among these models there is for example the Sinh-Gordon model. Our analysis provides a complement to recent developments regarding deformations of quantum field theories. The deformed model is investigated also in higher dimensions. In particular, locality and covariance properties are analyzed.
description: 20 pages
Lepimormia sibirica Jezek 1994
Creators: name: Tkoč, Michal
name: Pecharová, Martina
name: Ježek, Jan
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Lepimormia
Lepimormia sibirica

description: Lepimormia sibirica Ježek, 1994
(http://www.morphbank.net/?id=840045)
 Lepimormia sibirica Ježek, 1994a: 57, Figs 16–29.
The holotype is deposited in NMPC:
 HOLOTYPE (J): ‘ Russia / West Siberia, / Novosibirsk / distr.,Pasjolok, / 3.7.1988, Ježek leg., / 3849 / swamps near river / Inja, Salix, Ribes, / Caltha, Carex, Fe [p] // Lepimormia sibirica / Ježek, 1994 / male / holotype / Cat. No. 33603 / 1993 [p, red label]’.
 Current status. Valid species.
description: Published as part of Tkoč, Michal, Pecharová, Martina & Ježek, Jan, 2014, Catalogue of the type specimens of Diptera deposited in the Department of Entomology, National Museum, Prague, Czech Republic *, pp. 789-837 in Acta Entomologica Musei Nationalis Pragae 54 (2) on page 805, DOI: 10.5281/zenodo.5300543
Sliding charge-density-wave in two-dimensional rare-earth tellurides
Creators: name: Sinchenko, A. A.
name: Lejay, P.
name: Monceau, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Nonlinear transport properties are reported in the layered DyTe$_3$ compound at temperature below the charge-density-wave (CDW) transition, $T_P=302$ K. Conductivity is increasing sharply above the threshold electric field. Under application of a rf field Shapiro steps are clearly observed. These features demonstrate for the first time CDW sliding in two-dimensional compounds.
description: 4 pages, 4 figures
Higher rank sheaves on threefolds and functional equations
Creators: name: Gholampour, Amin
name: Kool, Martijn
Publisher: name: arXiv
Year: 2017
Subjects: subject: Algebraic Geometry (math.AG)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 14C05, 14F05, 14H50, 14J30, 14N35

description: We consider the moduli space of stable torsion free sheaves of any rank on a smooth projective threefold. The singularity set of a torsion free sheaf is the locus where the sheaf is not locally free. On a threefold it has dimension $\leq 1$. We consider the open subset of moduli space consisting of sheaves with empty or 0-dimensional singularity set.
 For fixed Chern classes $c_1,c_2$ and summing over $c_3$, we show that the generating function of topological Euler characteristics of these open subsets equals a power of the MacMahon function times a Laurent polynomial. This Laurent polynomial is invariant under $q \leftrightarrow q^{-1}$ (upon replacing $c_1 \leftrightarrow -c_1$). For some choices of $c_1,c_2$ these open subsets equal the entire moduli space.
 The proof involves wall-crossing from Quot schemes of a higher rank reflexive sheaf to a sublocus of the space of Pandharipande-Thomas pairs. We interpret this sublocus in terms of the singularities of the reflexive sheaf.
description: 29 pages. Published version
Critical behavior in a cross-situational lexicon learning scenario
Creators: name: Tilles, P. F. C.
name: Fontanari, J. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The associationist account for early word-learning is based on the co-occurrence between objects and words. Here we examine the performance of a simple associative learning algorithm for acquiring the referents of words in a cross-situational scenario affected by noise produced by out-of-context words. We find a critical value of the noise parameter $γ_c$ above which learning is impossible. We use finite-size scaling to show that the sharpness of the transition persists across a region of order $τ^{-1/2}$ about $γ_c$, where $τ$ is the number of learning trials, as well as to obtain the learning error (scaling function) in the critical region. In addition, we show that the distribution of durations of periods when the learning error is zero is a power law with exponent -3/2 at the critical point.
Logima zetterstedti Jezek 1983
Creators: name: Tkoč, Michal
name: Pecharová, Martina
name: Ježek, Jan
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Logima
Logima zetterstedti

description: Logima zetterstedti Ježek, 1983
(http://www.morphbank.net/?id=840047)
 Logima zetterstedti Ježek, 1983b: 224, Figs 40–58.
The holotype, the allotype and 10 paratypes are deposited in NMPC:
 HOLOTYPE (J): ‘ Czech Republic / Moravia, Horní / Líštná, env. Třinec, / 13. 10. 1972, [p] / 19925 [hw] / Ježek leg., stream [p] // Logima zetterstedti / Ježek, 1983 / male / HOLOTYPE / Cat. No. 32918 / J. Ježek det. / 1983 [p, red label]’.
 ALLOTYPE (♀): ‘ Czech Republic / Bohemia c., / Praha-Kunratice, / 3. 8. 1971, [p] / 19926 [hw] / Ježek leg. [p] // Logima zetterstedti / Ježek, 1983 / female / ALLOTYPE / Cat. No. 32919 / J. Ježek det. / 1983 [p, red label]’.
 PARATYPES (5 JJ): ‘ Czech Republic / Bohemia, Zichovec / env. Slaný, / 27. 8. 1971, [p] / 19927 [19927–19931] [hw] / Kovář leg. [p] // Logima zetterstedti / Ježek, 1983 / male / PARATYPE / Cat. No. 32920 [32920–32924] / J. Ježek det. / 1983 [p, red label]’.
 PARATYPES (5 ♀♀): ‘ Czech Republic / Bohemia, Zichovec / env. Slaný, / 27. 8. 1971, [p] / 19932 [19932–19936] [hw] / Kovář leg. [p] // Logima zetterstedti / Ježek, 1983 / female / PARATYPE / Cat. No. 32925 [32925–32929] / J. Ježek det. / 1983 [p, red label]’.
 Current status. Valid species: Psychoda (Logima) zetterstedti (Ježek, 1983); see KVIFTE (2012).
 Comment. The genus Logima Eaton, 1904 was described by EATON (1904), accepted by JEŽEK (1983b, 1984c) and DUCKHOUSE & LEWIS (1989) as genus, and subsequently downgraded to subgeneric level as subgenus of Psychoda Latreille, 1796 (KVIFTE 2012).
description: Published as part of Tkoč, Michal, Pecharová, Martina & Ježek, Jan, 2014, Catalogue of the type specimens of Diptera deposited in the Department of Entomology, National Museum, Prague, Czech Republic *, pp. 789-837 in Acta Entomologica Musei Nationalis Pragae 54 (2) on pages 806-807, DOI: 10.5281/zenodo.5300543
Mormia ckvitariorum Jezek 1987
Creators: name: Tkoč, Michal
name: Pecharová, Martina
name: Ježek, Jan
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Mormia
Mormia ckvitariorum

description: Mormia ckvitariorum Ježek, 1987
(http://www.morphbank.net/?id=840048)
 Mormia ckvitariorum Ježek, 1987c: 270, Figs 43–56.
The holotype and 29 paratypes are deposited in NMPC:
HOLOTYPE (J): ‘ SSSR / Abchazia, / Achalšeni env. / Suchumi / 14. 8. 1985 / Ježek lgt. / 1063 / vlhké břehy, silni- / ce, skály, Hepaticae, / Musci, Fragaria, / Hedera, Rubus / Corylus, Acer [hw] // Mormia / ckvitariorum / Ježek, 1987 / J / HOLOTYPUS / Cat. No. 33074 / Ježek det. / 1985 [hw, red label]’.
PARATYPES (9 JJ): ‘ SSSR / Abchazia, / Achalšeni env. / Suchumi / 14. 8. 1985 / Ježek lgt. [hw] / 1032 [1032–1040] / vlhké břehy, / silnice, skály, / Hepaticae, Musci, / Fragaria, Hedera, / Rubus, Corylus, / Acer [hw] // Mormia / ckvitariorum / Ježek, 1987 /J / PARATYPUS / Cat.No. 33075 [33075–33083] / Ježek det. / 1985 [hw, red label]’.
PARATYPES (2 JJ): ‘SSSR / Abchazia, / Achalšeni env. / Suchumi / 14. 8. 1985 / Ježek lgt. [hw] / 1055 [1055–1056] / vlhký břeh silnice, / skály, Ficus, / Hepaticae, Musci, / Rubus, Acer, / Carpinus [hw] // Mormia / ckvitariorum / Ježek, 1987 / J / PARATYPUS / Cat. No. 33084 [33084–33085] / Ježek det. / 1985 [hw, red label]’.
PARATYPES (5 JJ): ‘SSSR / Abchazia, / Kaman env. / Suchumi / 15. 8. 1985 / Ježek lgt. [hw] / 1043 [1043–1047] / kaňon, studánka, / potůček, Carpinus, / Sambucus, Hepati- / cae, Musci, Zea, / bílé kameny [hw] // Mormia / ckvitariorum / Ježek, 1987 /J / PARATYPUS / Cat.No. 33086 [33086–33090] / Ježek det. / 1985 [hw, red label]’.
PARATYPES (2 JJ): ‘SSSR / Abchazia, river / Psyrccha nr. / Novyj Afon–Anu- / chva, 19. 8. 1985 / Ježek lgt. [hw] / 1048 [1048–1049] / studánka, řečiš- / tě, skály, Ficus, / Myrtha, Carpinus, / Hepaticae, Rubus, / Asplenium [hw] // Mormia / ckvitariorum / Ježek, 1987 / J / PARATYPUS / Cat. No. 33091 [33091–33092] / Ježek det. / 1985 [hw, red label]’.
PARATYPES (5JJ): ‘SSSR / Abchazia, / Novyj Afon, / 19. 8. 1985 / Ježek lgt. [hw] / 1050 [1050–1054] / suché břehy, / silnice, skály, / Hepaticae, Musci, / Sambucus, Rubus, / Carpinus, Hedera [hw] // Mormia / ckvitariorum / Ježek, 1987 / J / PARATYPUS / Cat. No. 33093 [33093–33097] / Ježek det. / 1985 [hw, red label]’.
PARATYPES (6 JJ): ‘SSSR / Abchazia, / Kelasuri env. / Suchumi / 25. 8. 1985 / Ježek lgt. [hw] / 1057 [1057–1062] / potůček, skály, / Hepaticae, / Carpinus, Hedera, / Rhododendron, / Sambucus, Rubus [hw] // Mormia / ckvitariorum / Ježek, 1987 / J / PARATYPUS / Cat. No. 33098 [33098–33103] / Ježek det. / 1985 [hw, red label]’.
 Current status. Valid species.
description: Published as part of Tkoč, Michal, Pecharová, Martina & Ježek, Jan, 2014, Catalogue of the type specimens of Diptera deposited in the Department of Entomology, National Museum, Prague, Czech Republic *, pp. 789-837 in Acta Entomologica Musei Nationalis Pragae 54 (2) on page 807, DOI: 10.5281/zenodo.5300543
Group Analysis of Nonlinear Internal Waves in Oceans. II: The symmetries and rotationally invariant solution
Creators: name: Ibragimov, Nail H.
name: Ibragimov, Ranis N.
name: Kovalev, Vladimir F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 74J30

description: 74J30The maximal group of Lie point symmetries of a system of nonlinear equations used in geophysical fluid dynamics is presented. The Lie algebra of this group is infinite-dimensional and involves three arbitrary functions of time. The invariant solution under the rotation and dilation is constructed. Qualitative analysis of the invariant solution is provided and the energy of this solution is presented.
On marginal deformations of (0,2) non-linear sigma models
Creators: name: Melnikov, Ilarion V.
name: Sharpe, Eric
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: An N=1, d=4 supersymmetric compactification of the perturbative heterotic string is described by a d=2 (0,2) superconformal field theory. The first-order marginal deformations of the internal (0,2) SCFT are in 1 to 1 correspondence with massless gauge-neutral scalars in the spacetime theory. Working at tree-level in the alpha' expansion, we describe these first order deformations for SCFTs with a (0,2) non-linear sigma model description. Our results clarify the structure of deformations of heterotic Calabi-Yau compactifications and more general heterotic flux vacua.
description: 14 pages
Effect of the anisotropy on the glory structure of molecule-molecule scattering cross sections
Creators: name: Pérez-Ríos, Jesús
name: Bartolomei, Massimiliano
name: Campos-Martínez, José
name: Hernández, Marta. I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Total (elastic + rotationally inelastic) integral cross sections are computed for O$_2(^3Σ_g^-)$-O$_2(^3Σ_g^-)$ using a recent ab initio potential energy surface. The sampled velocity range allows us a thorough comparison of the glory interference pattern observed in molecular beam experiments. The computed cross sections are about 10% smaller than the measured ones, however, a remarkable agreement in the velocity positions of the glory extrema is achieved. By comparing with models where the anisotropy of the interaction is reduced or removed, it is found that the glory pattern is very sensitive to the anisotropy, especially the positions of the glory extrema.
description: 13 pages, 3 figures
Equilibration in long-range quantum spin systems from a BBGKY perspective
Creators: name: Paškauskas, Rytis
name: Kastner, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The time evolution of $\ell$-spin reduced density operators is studied for a class of Heisenberg-type quantum spin models with long-range interactions. In the framework of the quantum Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy, we introduce an unconventional representation, different from the usual cluster expansion, which casts the hierarchy into the form of a second-order recursion. This structure suggests a scaling of the expansion coefficients and the corresponding time scales in powers of $N^{1/2}$ with the system size $N$, implying a separation of time scales in the large system limit. For special parameter values and initial conditions, we can show analytically that closing the BBGKY hierarchy by neglecting $\ell$-spin correlations does never lead to equilibration, but gives rise to quasi-periodic time evolution with at most $\ell/2$ independent frequencies. Moreover, for the same special parameter values and in the large-$N$ limit, we solve the complete recursion relation (the full BBGKY hierarchy), observing a superexponential decay to equilibrium in rescaled time $τ=tN^{-1/2}$.
description: 3 figures
On the modelling of spur and helical gear dynamic behaviour
Creators: name: Velex, Philippe
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: This chapter is aimed at introducing the fundamentals of spur and helical gear dynamics. Using three-dimensional lumped models and a thin-slice approach for mesh elasticity, the general equations of motion for single-stage spur or helical gears are presented. Some particular cases including the classic one degree-of-freedom model are examined in order to introduce and illustrate the basic phenomena. The interest of the concept of transmission errors is analysed and a number of practical considerations are deduced. Emphasis is deliberately placed on analytical results which, although approximate, allow a clearer understanding of gear dynamics than that provided by extensive numerical simulations. Some extensions towards continuous models are presented.
Magnetically-Driven Ferroelectric Atomic Displacements in perovskite like YMnO3
Creators: name: Okuyama, D.
name: Ishiwata, S.
name: Takahashi, Y.
name: Yamauchi, K.
name: Picozzi, S.
name: Sugimoto, K.
name: Sakai, H.
name: Takata, M.
name: Shimano, R.
name: Taguchi, Y.
name: Arima, T.
name: Tokura, Y.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetically-driven ferroelectric atomic displacements of the order of 10$^{-3} Angstrom have been observed in orthorhombic (perovskite like) YMnO$_3$ by a single-crystal synchrotron x-ray diffraction. The refined polar structure shows the characteristic bond alternation driven by the exchange striction in staggered Mn-O-Mn arrays with $\uparrow\uparrow\downarrow\downarrow$ type ordering, giving rise to a spontaneous polarization along a-axis. First-principles calculations based on the Berry phase method as well as on the experimentally refined crystal structure can reproduce the observed polarization value.
description: 8 pages, 5 figures, 2 tables
Rigidity and vanishing of basic Dolbeault cohomology of Sasakian manifolds
Creators: name: Goertsches, Oliver
name: Nozawa, Hiraku
name: Toeben, Dirk
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: 53D35, 55N25, 58A14

description: The basic Dolbeault cohomology groups of a Sasakian manifold M are invariants of its characteristic foliation F (the orbit foliation of the Reeb flow). We show some fundamental properties of this cohomology, which are useful for its computation. In the first part of the article, we show that the basic Hodge numbers, the dimensions of the basic Dolbeault cohomology groups, only depend on the isomorphism class of the underlying CR structure. Equivalently, we show that the basic Hodge numbers are invariant under deformations of type I. This result reduces their computation to the quasi-regular case. In the second part, we show a basic version of the Carrell-Lieberman theorem relating the basic Dolbeault cohomology of (M,F) to that of (C,F), where C is the union of closed leaves of F. As a special case, if F has only finitely many closed leaves, then the (p,q)-th basic Hodge numbers are zero for p not equal to q. Combining the two results, we show that if M admits a nowhere vanishing CR vector field with finitely many closed orbits, then the (p,q)-th basic Hodge numbers are zero for p not equal to q. As an application of these results, we compute then the basic Hodge numbers for deformations of homogeneous Sasakian manifolds.
description: 24 pages