cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modulation-domain Kalman filtering for single-channel speech enhancement, denoising and dereverberation
Creators: name: Dionelis, Nikolaos
Publisher: name: Imperial College London
Year: 2019

description: This thesis is about robust single-channel speech enhancement, joint noise suppression and dereverberation, using modulation-domain Kalman filtering to blindly and adaptively track the time-frequency log-magnitude spectra of speech and reverberation. The focus of this work is the development of speech enhancement algorithms which operate on the log-spectral domain representation of single-channel degraded (noise and reverberation) speech recordings. The Kalman filtering framework is used extensively for algorithm development and the algorithms developed in this thesis are relevant to researchers interested in single-channel speech enhancement. In this work, several adaptive phase-sensitive speech enhancement algorithms based on modulation domain Kalman filtering are designed, described, implemented and evaluated that perform blind joint denoising and dereverberation, while accounting for the inter-frame speech dynamics by estimating the posterior distribution of the speech log-magnitude spectrum given the log-magnitude spectrum of the noisy reverberant speech. The algorithms are composed of different processing blocks and techniques; understanding the implementation choices that are made during the system design is important as this provides insights that can assist the development of new speech enhancement systems for both noise reduction and dereverberation. The Kalman filter update step models the non-linear relations between the speech, noise and reverberation log-spectra. The Kalman filtering algorithm uses a signal model that takes into account and tracks the reverberation parameters of the reverberation time, T60, and the direct-to-reverberant energy ratio (DRR) to improve the estimation of the speech log-magnitude spectrum. Phase-sensitive modulation-domain Kalman filtering in the log-spectral domain can now be performed and can now be better understood with this research work. The Kalman-filter-based enhancement algorithms, dependent on the signal model and the tracked quantities, are evaluated in terms of speech quality, speech intelligibility and dereverberation performance for a range of reverberation parameters and SNRs, in different noise types and reverberant conditions, and are also compared to competing denoising and dereverberation techniques. Experimental results and instrumental measures indicate that the proposed algorithms enhance the speech quality of the degraded noisy and reverberant signals and outperform other algorithms over a range of SNRs for various noise types and reverberant conditions.
An extension of positivity for integrals of Bessel functions and Buhmann's radial basis functions
Creators: name: Cho, Yong-Kum
name: Chung, Seok-Young
name: Yun, Hera
Publisher: name: arXiv
Year: 2018
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33C20, 41A30, 42B10

description: As to the Bessel integrals of type \begin{equation*} \int_0^x \left(x^μ-t^μ\right)^λt^αJ_β(t)dt\qquad(x>0), \end{equation*} we improve known positivity results by making use of new positivity criteria for ${}_1F_2$ and ${}_2F_3$ generalized hypergeometric functions. As an application, we extend Buhmann's class of compactly supported radial basis functions.
description: 15 pages, 4 figures
Design and Synthesis of New Modulators of Liver Receptor Homologue – 1
Creators: name: Bayly, Andrew Robert
Publisher: name: Imperial College London
Year: 2011

description: Nuclear receptor (NR) liver receptor homologue-1 (LRH-1) is a potential target for the treatment of breast cancers as a consequence of its regulation of aromatase and the estrogen receptor (ER). Development of modulators of NRs historically focuses on production of high affinity small molecules that compete for binding with natural ligands at the ligand-binding pocket (LBP) of the NR ligandbinding domain (LBD). Ligand-bound NRs induce transcriptional activity by subsequent recruitment of coactivator proteins. The majority of this thesis describes approaches towards the development of the first antagonists of LRH-1. In the first instance, small molecules that bind at the LBP of the receptor were developed through use of ligand-based virtual screening (VS) programs Cresset and SHop. Secondly, small molecules that directly disrupt the binding of cofactor proteins to the NR activation function-2 (AF-2) were developed through use of rational design and further Cresset VS.
Parafermionic character formulae
Creators: name: Jacob, P.
name: Mathieu, P.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study various aspects of parafermionic theories such as the precise field content, a description of a basis of states (that is, the counting of independent states in a freely generated highest-weight module) and the explicit expression of the parafermionic singular vectors in completely irreducible modules. This analysis culminates in the presentation of new character formulae for the $Z_N$ parafermionic primary fields. These characters provide novel field theoretical expressions for $\su(2)$ string functions.
description: Harvmac (b mode : 37 p)
Investigating the Relationship between Environment and Active Galactic Nuclei activity at High Redshift
Creators: name: Digby-North, Jonathan A
Publisher: name: Imperial College London
Year: 2011

description: This thesis presents an investigation into the relationship between large-scale structure environment and Active Galactic Nuclei (AGN) activity at high redshift. To accomplish this, the environments of AGN are studied from two complementary perspectives. Firstly, various observations of a specific large-scale structure at z = 2.3 are used to assess the level of AGN activity in relation to the field. The main result of this study is that both the emission-line and X-ray selected AGN populations are significantly enhanced; X-ray detected Lyman Alpha Emitters (LAEs), however, are not found to be significantly enhanced. The host galaxy properties of z ~ 1 X-ray sources are then derived and studied in detail. Confirming previous results, X-ray sources are found in optically luminous (MB ~< −20.5mag), massive (log(M∗/ M⊙) ≥ 10.5) red and blue hosts. A larger fraction of red/green hosts harbour obscured (log(NH) ≥ 22) AGN than blue, with the most obscured sources (log(NH) ≥ 23.5) also being more frequently found in red/green host galaxies than blue. The second approach used the 3rd-nearest neighbour measure to study the environment of X-ray hosts at z ~ 1, accounting for their optical colour, luminosity and stellar mass. A main new and important result is that X-ray hosts are found in regions of enhanced density compared to optical galaxies of equivalent mass, which is not due to the observed colour-density relation at z ~ 1. The enhancement is found to be most significant at the reddest colours, brightest luminosities, and highest stellar masses. The results from this thesis show that the dense environments probed in this work generally promote AGN activity. This is probably not due to major mergers, but could be due to an increased probability of minor mergers/interactions and/or milder environmental processes triggering nuclear activity. Alternatively, perhaps there is some other galaxy property (e.g., residing in higher mass haloes) which is conducive to AGN activity.
Scanning DMA Data Analysis I. Classification Transfer Function
Creators: name: Huajun Mai
name: Flagan, Richard C.
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 111714 Mental Health
subject: FOS: Health sciences

description: The scanning electrical mobility spectrometer (SEMS; also known as the scanning mobility particle sizer, SMPS) enables rapid particle size distribution measurements with a differential mobility analyzer (DMA)/condensation particle counter (CPC) combination by ramping the classifier voltage, and continuously counting particles into time bins throughout the scan. Inversion of scanning measurements poses a challenge due to the finite time response of the CPC; the distorted data can be deconvoluted to improve the fidelity of size distributions obtained with the SEMS/SMPS. Idealized models of the classification region have shown that, for rapid voltage scans that approach the particle residence time in the DMA, the nondiffusive transfer function deviates from the symmetric one seen at constant voltage. Nonetheless, most SEMS/SMPS data analyses employ the constant voltage transfer function, a result that is valid only for plug flow in the classification region. This article develops the scanning-mode transfer function for the actual geometry of the TSI Model 3081 DMA. Finite element calculations are used to determine the flow and electric fields through the entire DMA. The instantaneous scanning-DMA transfer function for diffusive particles is determined using Brownian dynamics simulations. Comparisons of the results from this simulation of a real instrument to those from the idealized models reveal the shortcomings of prior models in describing the instantaneous scanning-DMA transfer function. A companion paper (Part II) combines this scanning-mode transfer function with response functions for the other components of a SEMS/SMPS measurement system in order to derive the response function for the integrated measurement system. Copyright © 2018 American Association for Aerosol Research
Papilio helenus Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Papilionidae
Papilio
Papilio helenus

description: Papilio helenus [spec. nov.]
P. E. alis caudatis nigris: posticis macula alba: subtus tribus albidis lunulisque septem ferrugineis. M. L. U.
Habitat in Asia.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 459, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Buffer gas cooling of YbF molecules
Creators: name: Skoff, Sarah Margaretha
Publisher: name: Imperial College London
Year: 2011

description: This thesis reports on the production and characterisation of the first slow and cold beam of YbF molecules using buffer gas cooling. These molecules are being used to measure the electron’s electric dipole moment, and an intense source of slow-moving molecules is desirable for this experiment. The molecules are loaded into a buffer gas cell via laser ablation where they thermalise with cold helium buffer gas. They are then detected inside the cell using laser absorption imaging and spectroscopy on the X2Σ+→A2II1/2 transition. The formation, diffusion and thermalisation dynamics of the molecules inside the cell are studied. Measurements of laser absorption versus intensity reveal that saturation of the absorption is due to a competition between optical pumping into dark states and repopulation of the addressed level by inelastic and velocity-changing collisions. A beam of YbF molecules is extracted through an aperture in the buffer gas cell and characterised using laser induced fluorescence detection. Peak fluxes of 1010 molecules per steradian per pulse, in the rotational and vibrational ground state, are obtained. The translational and rotational temperatures are in equilibrium with the cell temperature of 4 K. The forward velocity of the pulses can be varied between 130 m/s and 200 m/s by changing the buffer gas pressure. This source is an order of magnitude brighter and more than three times slower than a supersonic source of YbF molecules and provides an excellent starting point for improving the measurement of the electron’s electric dipole moment and for deceleration and trapping experiments. In order to reduce the helium load on the vacuum system and to shorten the molecular pulses, a second set-up, delivering the buffer gas into an open copper cylinder in pulses rather than in a continuous flow,is characterised and shows promising first results.
Gas of D-Branes and Hagedorn Density of BPS States
Creators: name: Vafa, Cumrun
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We test the prediction of a hagedorn density of BPS states which carry RR charge in type II compactifications. We find that in certain cases they correspond to the supersymmetric ground states for a gas of identical 0-branes.
description: 8 pages, a minor Tex error corrected
Bulk Witten Indices and the Number of Normalizable Ground States in Supersymmetric Quantum Mechanics of Orthogonal, Symplectic and Exceptional Groups
Creators: name: Staudacher, Matthias
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This note addresses the question of the number of normalizable vacuum states in supersymmetric quantum mechanics with sixteen supercharges and arbitrary semi-simple compact gauge group, up to rank three. After evaluating certain contour integrals obtained by appropriately adapting BRST deformation techniques we propose novel rational values for the bulk indices. Our results demonstrate that an asymptotic method for obtaining the boundary contribution to the index, originally due to Green and Gutperle, fails for groups other than SU(N). We then obtain likely values for the number of ground states of these systems. In the case of orthogonal and symplectic groups our finding is consistent with recent conjectures of Kac and Smilga, but appears to contradict their result in the case of the exceptional group G_2.
description: 7 pages, one comment plus reference added, version to be published in Phys. Lett. B
Calibration of a particle mass spectrometer using polydispersed aerosol particles
Creators: name: Cuizhi Sun
name: Takegawa, Nobuyuki
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Inorganic Chemistry
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Routine calibrations of online aerosol chemical composition analyzers are important for assessing data quality during field measurements. The combination of a differential mobility analyzer (DMA) and condensation particle counter (CPC) is a reliable, conventional method for calibrations. However, some logistical issues arise, including the use of radioactive material, quality control, and deployment costs. Herein, we propose a new, simple calibration method for a particle mass spectrometer using polydispersed aerosol particles combined with an optical particle sizer. We used a laser-induced incandescence–mass spectrometric analyzer (LII-MS) to test the new method. Polydispersed aerosol particles of selected chemical compounds (ammonium sulfate and potassium nitrate) were generated by an aerosol atomizer. The LII section was used as an optical particle sizer for measuring number/volume size distributions of polydispersed aerosol particles. The calibration of the MS section was performed based on the mass concentrations of polydispersed aerosol particles estimated from the integration of the volume size distributions. The accuracy of the particle sizing for each compound is a key issue and was evaluated by measuring optical pulse height distributions for monodispersed ammonium sulfate and potassium nitrate particles as well as polystyrene latex particles. A comparison of the proposed method with the conventional DMA-CPC method and its potential uncertainties are discussed. Copyright © 2018 American Association for Aerosol Research
Papilio troilus Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Papilionidae
Papilio
Papilio troilus

description: Papilio troilus [spec. nov.]
P. E. alis caudatis nigris: primoribus punctis marginalibus pallidis; posticis subtus maculis fulvis. M. L. U.
Habitat in Indiis.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 459, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
Relativistic Thermal Bremsstrahlung Gaunt Factor for the Intracluster Plasma
Creators: name: Nozawa, Satoshi
name: Itoh, Naoki
name: Kohyama, Yasuharu
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the relativistic thermal bremsstrahlung Gaunt factor for the high-temperature plasma which exists in clusters of galaxies. We calculate the Gaunt factor by employing the Bethe-Heitler cross section corrected by the Elwert factor. We also calculate the Gaunt factor by using the Coulomb-distorted wave functions for nonrelativistic electrons following the method of Karzas and Latter. By comparing the Gaunt factors calculated by these two different methods, we carefully assess the accuracy of the calculation. We present the numerical results in the form of tables.
description: 15 pages, 4 figures and 2 tables, submitted to Astrophysical Journal
Hamiltonian Formalism for Space-time Non-commutative Theories
Creators: name: Gomis, Joaquim
name: Kamimura, Kiyoshi
name: Llosa, Josep
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Space-time non-commutative theories are non-local in time. We develop the Hamiltonian formalism for non-local field theories in d space-time dimensions by considering auxiliary d+1 dimensional field theories which are local with respect to the evolution time. The Hamiltonian path integral quantization is considered and the Feynman rules in the Lagrangian formalism are derived. The case of non-commutative ϕ^3 theory is considered as an example.
description: 6 pages, A new section is added with other comments and references. To appear in PRD
Towards the catalytic asymmetric bromination of alkenes
Creators: name: Cailleau, Thaïs
Publisher: name: Imperial College London
Year: 2011

description: This thesis relates our efforts towards the development of a general method for the catalytic asymmetric bromination of alkenes. Previous work within the group had reported the synthesis and the use of 2,6-di-[(4R,5R)-4,5-diphenyl-4,5-dihydro-1H-imidazol-2yl]-iodobenzene to catalyse the bromolactonisation of (±)-2-cyclopentene-1-acetic acid with some asymmetric induction observed. The reaction was initially postulated to proceed via formation of a hypervalent N-I(III)-Br bond in the catalyst, which by placing the electrophilic bromine in a chiral environment would allow for its selective delivery to the alkene substrate. Initial work aimed to acquire a better understanding of that reaction system and some mechanistic studies were undertaken. A different outcome to the one expected is reported and it was concluded that during the bromolactonisation reaction, no hypervalent iodine species was forming in situ and that instead a potential kinetic resolution via α-salt formation and diastereoselective halolactonisation mechanism was operating. These findings necessitated a redesign of the catalyst and the synthesis of various bis-amidine analogues is described. An unexpected rearrangement is also unveiled and its mechanism discussed. The new catalysts were screened in our asymmetric brominating system, using different alkene substrates, and the results are reported and discussed. Subsequent studies focused on elaborating a general method for the asymmetric dibromination of alkenes, where Br+ would be delivered by a stoichiometric chiral promoter. Screening of various alkene substrates to identify a suitable candidate is reported and discussed. The asymmetric dibromination of the chosen alkene is described and further investigations in order to elucidate the reasons for the lack of enantioselectivity observed are reported. Finally, attempts to synthesise Ts-DPEN following a similar route as previously developed within the group for the synthesis of DPEN is reported as a side chapter. Various attempts at the final benzoyl cleavage are described and discussed.
Calibration of a particle mass spectrometer using polydispersed aerosol particles
Creators: name: Cuizhi Sun
name: Takegawa, Nobuyuki
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Inorganic Chemistry
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Routine calibrations of online aerosol chemical composition analyzers are important for assessing data quality during field measurements. The combination of a differential mobility analyzer (DMA) and condensation particle counter (CPC) is a reliable, conventional method for calibrations. However, some logistical issues arise, including the use of radioactive material, quality control, and deployment costs. Herein, we propose a new, simple calibration method for a particle mass spectrometer using polydispersed aerosol particles combined with an optical particle sizer. We used a laser induced incandescence - mass spectrometric analyzer (LII-MS) to test the new method. Polydispersed aerosol particles of selected chemical compounds (ammonium sulfate and potassium nitrate) were generated by an aerosol atomizer. The LII section was used as an optical particle sizer for measuring number/volume size distributions of polydispersed aerosol particles. The calibration of the MS section was performed based on the mass concentrations of polydispersed aerosol particles estimated from the integration of the volume size distributions. The accuracy of the particle sizing for each compound is a key issue and was evaluated by measuring optical pulse height distributions for monodispersed ammonium sulfate and potassium nitrate particles as well as polystyrene latex particles. A comparison of the proposed method with the conventional DMA-CPC method and its potential uncertainties are discussed.
Measuring elbow kinematics in cricket bowling
Creators: name: Eftaxiopoulou, Theofano
Publisher: name: Imperial College London
Year: 2011

description: In the sport of cricket the objective of the ‘no-ball’ law is to allow no performance advantage through elbow extension during ball delivery. Since the advent of high-speed video photography it has been revealed that some straightening occurs in bowlers who have actions that are traditionally considered in accordance with the law. Measuring the three-dimensional movement of the elbow is vital when assessing bowling legality in cricket. However, the elbow joint is a complex structure with a remarkable range of motion and tracking its movement through skin-based techniques can be highly erroneous due to the thick layer of skin overlying the joint. Within this work, a biomechanical model was mathematically developed and experimentally validated to assess bowling legality in cricket. The new model meets all of the specifications of a measurement method to be used in sports-related biomechanical studies for non-invasive measurement of joint kinematics at high speeds whilst allowing for the subject to move freely within a large volume. The model was compared with existing methods via a series of sensitivity analyses and was found to significantly improve repeatability compared to available elbow measurement techniques particularly in measuring subtle elbow rotations, such as elbow abduction and forearm pronation. In addition this model can be easily implemented within the existing experimental protocol for assessing bowling legality in cricket as proposed by the England and Wales Cricket Board and will be used in future clinical and sport-related studies.
The Zero Curvature Formulation of TB, sTB Hierarchy and Topological Algebras
Creators: name: Das, Ashok
name: Roy, Shibaji
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A particular dispersive generalization of long water wave equation in $1+1$ dimensions, which is important in the study of matrix models without scaling limit, known as two--Boson (TB) equation, as well as the associated hierarchy has been derived from the zero curvature condition on the gauge group $SL(2,R)\otimes U(1)$. The supersymmetric extension of the two--Boson (sTB) hierarchy has similarly been derived from the zero curvature condition associated with the gauge supergroup $OSp(2|2)$. Topological algebras arise naturally as the second Hamiltonian structure of these classical integrable systems, indicating a close relationship of these models with 2d topological field theories.
description: 15 pages, plain Latex, no figures
On exploring feature representation learning of items to forecast their rise and fall in social media
Creators: name: Li, Cheng-Te
name: Chen, Hsin-Yu
name: Zhang, Yang
Publisher: name: CISPA
Year: 2024

description: User-item interactions in social media provide a rich dataset for wide applications such as viral marketing and recommender systems. Post retweeting behaviors and venue check-in events by users are the most representative. While existing studies predict items’ rise and fall, i.e., tweet popularity and venue closure detection, using hand-crafted features, this paper aims at exploring feature representation learning to improve prediction performance. We target at two essential time-series classification tasks on social media, including Shutdown Risk Prediction (SRP) of venues and Tweet Popularity Prediction (TPP) of posts. We study how feature representation learning of items can benefit both SRP and TPP tasks. The main idea is to learn item embedding vectors as features in item-item graphs constructed from time series of check-in events and retweeting behaviors. The learned features are used together with manually-defined features to enlarge the representation capability. In the TPP task, we also propose a pattern-aware self-exciting point process (PSEISMIC) model to generate time-series features. Experiments conducted on Instagram, Foursquare, and Twitter datasets exhibit promising performance of jointly utilizing learned and extracted features in both tasks. PSEISMIC can also further boost TPP accuracy. The major contribution of this work is three-fold. First, we propose to jointly deal with SRP and TPP under the same framework of feature extraction and learning. Second, we show that feature presentation learning of items can benefit these two prediction tasks with time series data. Third, by incorporating time series patterns, the proposed PSEISMIC further improves the performance of popularity prediction.
Is there a deficit of S0s at intermediate redshift?
Creators: name: Andreon, Stefano
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Two contradictory results on the evolution of SO galaxies now exist in the recent literature; either S0s are old ($z_{formation}>2$) and are evoloving passively or most of them formed at $z<0.5$, as implied by the deficit of S0s in intermediate redshift ($z\sim0.5$) clusters. The resolution of this controversy may be that the apparent deficit of S0s has been derived from a quantity -- the E to S0 ratio -- which is prone to morphological classification errors. Once all sources of error are taken into account, the E to S0 ratios of clusters at different redshifts are fully compatible, and no additional creation of S0s at $z<0.5$ is required by the data. Furthermore, there is no deficit at all of S0s in the intermediate redshift cluster for which we have morphological types of very high quality, and thus derive an E to S0 ratio with a small error.
description: ApJ, in press
Constitutive laws for unidirectional composite materials
Creators: name: Vyas, Gaurav
Publisher: name: Imperial College London
Year: 2012

description: Failure predictions for a fibre-reinforced composite with unidirectional (UD) plies can only be relied upon provided the stress state is accurately known. This requires a prediction of the constitutive response to be made when the material is loaded. When failure does occur, matrix cracking is frequently the first mode of failure. Cracking results in a reduction of the material properties of the structure and can lead to other forms of damage. In this context, an elasto-plastic constitutive model that can accurately represent the full non-linear mechanical response of UD composites is developed, as well as the implementation of an improved model for matrix cracking. Unlike many existing constitutive models in the literature, the developed model captures some key features that are often neglected in constitutive modelling. These include the effect of hydrostatic pressure on both the elastic and non-elastic response. A novel yield function is formulated specifically for polymer-matrix fibre-reinforced composites, taking into account the presence of fibres in the material. The developed model is able to predict the non-linear response under complex loading combinations, given only the experimental response from two uniaxial tests. A non-associative flow rule is used to capture the pressure sensitivity of the material. The translation of subsequent yield surfaces under complex loading regimes is modelled by the inclusion of a non-linear kinematic hardening rule, which also allows for simulation of material unloading. The implementation of the model as a user defined material subroutine in a commercial finite element package is described. Regarding the modelling of matrix cracking, several methods are available in the literature. These models are reviewed and an existing model is combined with suitable failure criteria for the simulation of stiffness loss and crack accumulation in laminates. This model is then used to make predictions of crack accumulation and loss in stiffness of composite materials.
Papilio pammon Linnaeus, 1758, spec. nov.
Creators: name: Linnaeus, Carolus
Publisher: name: Laurentius Salvius
Year: 1758
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Papilionidae
Papilio
Papilio pammon

description: Papilio pammon [spec. nov.]
P. E. alis caudatis nigris concoloribus: omnibus margine maculatis; posticis fascia maculis septem albis.
Habitat in Asia.
description: Published as part of Linnaeus, Carolus, 1758, Systema Naturae per regna tria naturae: secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis, Stockholm :Laurentius Salvius on page 460, DOI: 10.5962/bhl.title.542, http://zenodo.org/record/3922206
On Theories With Light-Like Noncommutativity
Creators: name: Aharony, Ofer
name: Gomis, Jaume
name: Mehen, Thomas
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that field theories with light-like noncommutativity, that is with $θ^{0i}=-θ^{1i}$, are unitary quantum theories, and that they can be obtained as decoupled field theory limits of string theory with D-branes in a background NS-NS $B$ field. For general noncommutativity parameters, we show that noncommutative field theories which are unitary can be obtained as decoupled field theory limits of string theory, while those that are not unitary cannot be obtained from string theory because massive open strings do not decouple. We study the different theories with light-like noncommutativity which arise from Type II D-branes. The decoupling limit of the D4-brane seems to lead to a noncommutative field theory deformation of the $(2,0)$ SCFT of M5-branes, while the D5-brane case leads to a noncommutative variation of ``little string theories''. We discuss the DLCQ description of these theories.
description: 16 pages, harvmac; v2: clarified the relation between the light-like D4 and M5 theories; references added
Multi-band polarization of Type IIP supernovae due to light echo from circumstellar dust
Creators: name: Nagao, Takashi
name: Maeda, Keiichi
name: Tanaka, Masaomi
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Type IIP supernovae (SNe IIP) often show relatively high continuum polarization ($\sim 1$\%) in the late phase. This polarization feature is generally believed to be due to an inner aspherical core revealed in the late phase, while this polarization feature can also be contributed by the effect of polarized-scattered echoes by circumstellar (CS) dust around the SN. In this paper, we propose a unique method to distinguish polarization from the SN ejecta and from the light echo. We quantitatively examine wavelength dependence of the polarization created by the scattered echoes for various geometries and amounts of CS dust. It is found that the polarization in the $U$-band has characteristic features, i.e., the polarization emerges at an earlier phase with higher polarization degree than that in longer wavelengths. These are due to the rapid evolution of the $U$-band light curve as well as higher optical depth of dust in shorter wavelengths. Except for the $U$ band, the polarization increases after the plateau phase, and the polarization degree is generally higher for shorter wavelengths. These polarimetric features can be easily distinguished from the polarization expected from an aspherical core, which predicts almost no wavelength dependence. Moreover, we show that multi-band polarimetric observations for SNe IIP can constrain a parameter space in the CS dust mass and distance from the SNe. We thus encourage multi-band polarimetric observations for SNe IIP.
description: 12 pages, 15 figures, accepted for publication in the Astrophysical Journal
Discovery of the X-ray transient SAX J1808.4-3658, a likely low mass X-ray binary
Creators: name: Zand, J. J. M. in 't
name: Heise, J.
name: Muller, J. M.
name: Bazzano, A.
name: Cocchi, M.
name: Natalucci, L.
name: Ubertini, P.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the discovery of a fairly bright transient during observations with the Wide Field Cameras on board the BeppoSAX satellite in September 1996. It was detected at a peak intensity of 0.1 Crab (2 to 10 keV) and lasted between 6 and 40 days above a detection threshold of 2 mCrab. Two very bright type I X-ray bursts were detected from this transient in the same observations. These almost certainly identify this X-ray transient as a low-mass X-ray binary with a neutron star as compact component. The double-peaked time history of both bursts at high energies suggests a peak luminosity close to the Eddington limit. Assuming this to be true implies a distance to this object of 4 kpc.
description: 4 pages, 4 figures, published in A&A March II 1998 issue
Coordination diversity in tin compounds with bis(benzoxazole)phenol as a polydentate ligand: Synthesis and crystal structure studies
Creators: name: Segovia-Pérez, Raúl
name: Alvarado-Rodríguez, José G.
name: Rojas-Lima, Susana
name: López-Ruiz, Heraclio
name: Andrade-López, Noemí
name: Jancik, Vojtech
name: Cruz-Borbolla, Julián
name: Martínez-Otero, Diego
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biophysics
subject: Biochemistry
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Pharmacology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Computational Biology

description: The reaction of 2,6-bis(benzoxazolyl)-4-tert-butylphenol (HL) with [nBuxSnCl4−x] (x = 0, 1) in 1:1 stoichiometry yielded the tin coordination complexes [(HL)SnnBuxCl4−x] [x = 0 (1); x = 1 (2)]. Deprotonation of HL was performed using reagents having groups with high basicity such as nBuLi or [Sn{N(SiMe3)2}2]. These basic reagents prompted the coordination of the ligand in its anionic form, yielding the complexes [(thf)2Li(L)SnCl4] (3) and [(L)Sn{N(SiMe3)2}] (4), respectively. The molecular structure of HL displayed an intramolecular hydrogen bond OH—N and a planar arrangement of the bis(benzoxazolyl)phenolic system. In the molecular structures of both complexes containing HL an intramolecular hydrogen bond of NH—O type was also present. The coordination of the ligand in either neutral or anionic form is described by a κO,κN chelate mode toward Sn. All complexes displayed bis(benzoxazolyl)phenolic moieties close to planar; the least planar system was observed in 4 that was also studied by DFT methods.
Deformed Heisenberg Algebra with Reflection, Anyons and Supersymmetry of Parabosons
Creators: name: Plyushchay, Mikhail S.
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Deformed Heisenberg algebra with reflection appeared in the context of Wigner's generalized quantization schemes underlying the concept of parafields and parastatistics of Green, Volkov, Greenberg and Messiah. We review the application of this algebra for the universal description of ordinary spin-$j$ and anyon fields in 2+1 dimensions, and discuss the intimate relation between parastatistics and supersymmetry.
description: 4 pages. Talk given at the Int. Conf. ``Spin-Statistics Connection and Commutation Relations", Anacapri, Capri Island, Italy -- May 31-June 3, 2000 (to appear in Proceedings)
A Graph-Based Approach to Explore Relationship Between Hashtags and Images
Creators: name: Zhong, Zhiqiang
name: Zhang, Yang
name: Pang, Jun
Publisher: name: CISPA
Year: 2024

description: Online social networks are playing a great role in our daily life by providing a platform for users to present themselves, articulate their social circles, and interact with each other. Posting image is one of the most popular online activities, through which people could share experiences and express their emotions. Intuitively, there must exist a connection between images and their associated hashtags. In this paper,
we focus on systematically describing this relationship and using it to improve downstream tasks. First, we use a two-sample Kolmogorov-Smirnov test on an Instagram dataset to show the existence of the relationship at a significance level of α = 0.001. Second, in order to comprehensively explore the relationship and quantitatively analyse it, we adopt a graphbased approach, utilising the semantic information of hashtags and graph structure among images, to mine meaningful features for both hashtags and images. At last, we apply the extracted features about the relationship to improve an image multi-label classification task. Compared to a state-of-the-art method, we achieve a 12.0% overall precision gain.
Modeling dust emission in PN IC 418
Creators: name: Gómez-Llanos, V.
name: Morisset, C.
name: Szczerba, R.
name: García-Hernández, D. A.
name: García-Lario, P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigated the infrared (IR) dust emission from PN IC 418, using a detailed model controlled by a previous determination of the stellar properties and the characteristics of the photoionized nebula, keeping as free parameters the dust types, amounts and distributions relative to the distance of the central star. The model includes the ionized region and the neutral region beyond the recombination front (Photodissociation region, or PDR), where the [OI] and [CII] IR lines are formed. We succeeded in reproducing the observed infrared emission from 2 to 200~\mm. The global energy budget is fitted by summing up contributions from big grains of amorphous carbon located in the neutral region and small graphite grains located in the ionized region (closer to the central star). Two emission features seen at 11.5 and 30~\mm are also reproduced by assuming them to be due to silicon carbide (SiC) and magnesium and iron sulfides (Mg$_x$Fe$_{1-x}$S), respectively. For this, we needed to consider ellipsoidal shapes for the grains to reproduce the wavelength distribution of the features. Some elements are depleted in the gaseous phase: Mg, Si, and S have sub-solar abundances (-0.5 dex below solar by mass), while the abundance of C+N+O+Ne by mass is close to solar. Adding the abundances of the elements present in the dusty and gaseous forms leads to values closer to but not higher than solar, confirming that the identification of the feature carriers is plausible. Iron is strongly depleted (3 dex below solar) and the small amount present in dust in our model is far from being enough to recover the solar value. A remaining feature is found as a residue of the fitting process, between 12 and 25~\mm, for which we do not have identification.
description: Accepted for publication in Astronomy & Astrophysics. V2: adding references
BRST-BFV quantization and the Schwinger action principle
Creators: name: Garcia, J. Antonio
name: Vergara, J. David
name: Urrutia, Luis F.
Publisher: name: arXiv
Year: 1995
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We introduce an operator version of the BRST-BFV effective action for arbitrary systems with first-class constraints. Using the Schwinger action principle we calculate the propagators corresponding to: (i) the parametrized non-relativistic free particle, (ii) the relativistic free particle and (iii) the spining relativistic free particle. Our calculation correctly imposes the BRST-invariance at the end-points. The precise use of the additional boundary terms required in the description of fermionic variables is also incorporated.
description: 28 pages, LaTeX
Noncommutative spheres and the AdS/CFT correspondence
Creators: name: Jevicki, Antal
name: Mihailescu, Mihail
name: Ramgoolam, Sanjaye
Publisher: name: arXiv
Year: 2000
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present direct arguments for non-commutativity of spheres in the AdS/CFT correspondence. The discussion is based on results for the $S_N$ orbifold SCFT. Concentrating on three point correlations (at finite $N$) we exhibit a comparison with correlations on a non-commutative sphere. In this manner an essential signature of non-commutativity is identified giving further support for the original proposal of hep-th/9902059.
description: 15 pages, harvmac big. Version 3 - references added
A Vishniac type contribution to the polarisation of the CMBR?
Creators: name: Seshadri, T. R.
name: Subramanian, K.
Publisher: name: arXiv
Year: 1998
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Radiation which has a quadrupole component of anisotropy, can get polarized by Thomson scattering from charged particles. In the cosmological context, the microwave background photons develop significant quadrupole anisotropy as they free stream away from the the epoch of standard recombination. Reionization in the post recombination era can provide free electrons to Thomson scatter the incident anisotropic $CMBR$ photons. We compute the resulting polarisation anisotropy on small (arc-minute) angular scales. We look for significant non-linear contributions, as in the case of Vishniac effect in temperature anisotropy, due to the coupling of small-scale electron density fluctuations, at the new last scattering surface, and the temperature quadrupole. We show that, while, in cold dark matter type models, this does not lead to very significant signals ($\sim 0.02 - 0.04 μK$), a larger small angular scale polarization anisotropy, ($\sim 0.1 - 0.5μK$), can result in isocurvature type models.
description: 13 pages, Revtex, no figures
title: Прекращение трудового договора: актуальные вопросы и судебная практика
title: Учебное пособие
titleType: Subtitle
Creators: name: Колобова С.В.
Publisher: name: Вузовское образование
Year: 2019

description: Учебное пособие подготовлено на основе Трудового кодекса Российской Федерации с учетом внесенных изменений и дополнений. Теоретические выводы логически обоснованы и подкреплены материалами из судебной практики. Сделана попытка рассмотреть наиболее сложные с точки зрения практического применения вопросы прекращения трудового договора, используя Постановление Пленума Верховного Суда РФ от 17.03.2004 г. № 2 (в редакции от 22.12.2006 г. № 63, от 28.09.2010 г. № 22, от 24.11.2015 г. № 52) «О применении суда-ми Российской Федерации Трудового кодекса Российской Федерации». При подготовке настоящего издания законодательство РФ использовано по состоянию на 25.12.2018 г. Учебное пособие подготовлено с учетом требований Федерального государственного стандарта высшего образования. Предназначено для студентов вузов, обучающихся по направлениям подготовки бакалавриата: 40.03.01 «Юриспруденция», 38.03.04 «Государственное и муниципальное управление», 41.03.04 «Политология», 42.03.01 «Реклама и связи с общественностью» и специалитета: 40.05.01 «Правовое обеспечение национальной безопасности», 38.05.02 «Таможенное дело», а также для других направлений подготовки и специальностей, изучающих дисциплину «Трудовое право». Издание может быть полезным для преподавателей вузов, практических работников, а также широкого круга читателей, интересующихся вопросами прекращения трудового договора.