cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Ein System zur Lernunterstützung und Bewertung für die relationale Algebra
Creators: name: Shmit, Firas
Publisher: name: Hochschule Hannover
Year: 2021
Subjects: subject: 004 Informatik

description: In dieser Arbeit wurde ein System entwickelt, welches Übungsaufgaben der relationalen Algebra automatisch auswertet und dies in Form einer Punktevergabe bewertet. Darüber hinaus ist das System in der Lage lernunterstützende Feedbacks zu generieren. Dadurch sollen Studierende, die im Rahmen der Datenbank-Vorlesung relationale Algebra lernen, eine korrekte und optimierte Sprachanwendung im Bereich der relationalen Algebra lernen.
On Minimally-Parametric Primordial Power Spectrum Reconstruction and the Evidence for a Red Tilt
Creators: name: Verde, Licia
name: Peiris, Hiranya V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The latest cosmological data seem to indicate a significant deviation from scale invariance of the primordial power spectrum when parameterized either by a power law or by a spectral index with non-zero "running". This deviation, by itself, serves as a powerful tool to discriminate among theories for the origin of cosmological structures such as inflationary models. Here, we use a minimally-parametric smoothing spline technique to reconstruct the shape of the primordial power spectrum. This technique is well-suited to search for smooth features in the primordial power spectrum such as deviations from scale invariance or a running spectral index, although it would recover sharp features of high statistical significance. We use the WMAP 3 year results in combination with data from a suite of higher resolution CMB experiments (including the latest ACBAR 2008 release), as well as large-scale structure data from SDSS and 2dFGRS. We employ cross-validation to assess, using the data themselves, the optimal amount of smoothness in the primordial power spectrum consistent with the data. This minimally-parametric reconstruction supports the evidence for a power law primordial power spectrum with a red tilt, but not for deviations from a power law power spectrum. Smooth variations in the primordial power spectrum are not significantly degenerate with the other cosmological parameters.
description: 18 pages, 8 figures, JCAP. Minor changes to match published version
Circular dichroism in atomic vapors: magnetically induced transitions responsible for two distinct behaviors
Creators: name: Sargsyan, Armen
name: Amiryan, Arevik
name: Tonoyan, Ara
name: Klinger, Emmanuel
name: Sarkisyan, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Atomic transitions of alkali metals for which the condition $F_e-F_g = \pm2$ is satisfied have null probability in a zero magnetic field, while a giant increase can occur when an external field is applied. Such transitions, often referred to as magnetically-induced (MI) transitions, have received interest because their high probabilities in wide ranges of external magnetic fields which, in some cases, are even higher than that of usual atomic transitions. Previously, the following rule was established: the intensities of MI transitions with $ΔF=\pm2$ are maximum when using respectively $σ^\pm$ radiation. Within the same ground state, the difference in intensity for $σ^+$ and $σ^-$ radiations can be significant, leading to magnetically induced circular dichroism (MCD), referred to as type-1. Here, we show that even among the strongest MI transitions, $i.e$ originating from different ground states for $σ^+$ and $σ^-$, the probability of MI transition with $ΔF = + 2$ is always greater, which leads to another type of MCD. Our experiments are performed with a Cs-filled nanocell, where the laser is tuned around the D$_2$ line; similar results are expected with other alkali metals. Theoretical calculations are in excellent agreement with the experimental measurements.
description: 17 pages, 7 figures
title: Complete hydatidiform mole with coexistent twins following in vitro fertilisation
Creators: name: Joy, John
Publisher: name: EURORAD
Year: 2024
Subjects: subject: Genital (female) imaging
subject: Obstetrics (Pregnancy / birth / postnatal period)
subject: MR
subject: Ultrasound
subject: Clinical Case

description: Clinical History: A 40-year-old primi who conceived through IVF presented with pre-eclampsia at 19 weeks gestation. She also has poorly controlled gestational diabetes mellitus, on treatment with oral hypoglycemic agents and long-standing hypothyroidism requiring levothyroxine therapy. Cervical incompetence was also detected, requiring cerclage at 14 weeks.

description: 40 years, female
DeepTreeGANv2: Iterative Pooling of Point Clouds
Creators: name: Scham, Moritz
name: Krücker, Dirk
name: Borras, Kerstin
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023

description: In High Energy Physics, detailed and time-consuming simulations are used for particle interactions with detectors. To bypass these simulations with a generative model, the generation of large point clouds in a short time is required, while the complex dependencies between the particles must be correctly modelled. Particle showers are inherently tree-based processes, as each particle is produced by the decay or detector interaction of a particle of the previous generation.In this work, we present a significant extension to DeepTreeGAN, featuring a critic, that is able to aggregate such point clouds iteratively in a tree-based manner. We show that this model can reproduce complex distributions, and we evaluate its performance on the public JetNet 150 dataset.
Unraveling NEAT1's complex role in lung cancer biology: a comprehensive review
Creators: name: Hussain, Md Sadique
name: Afzal, Obaid
name: Gupta, Gaurav
name: Goyal, Ahsas
name: Almalk, Waleed Hassan
name: Kazmi, Imran
name: Alzarea, Sami I.
name: Alfawaz Altamimi, Abdulmalik Saleh
name: Kukreti, Neelam
name: Chakraborty, Amlan
name: Singh, Sachin Kumar
name: Dua, Kamal
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2024
Subjects: long non-coding RNA
NEAT1
lung cancer
clinical applications
cancer

description: This review delves into the pivotal role of the long non-coding RNA NEAT1 in cancer biology, particularly in lung cancer (LC). It emphasizes NEAT1's unique subcellular localization and active involvement in gene regulation and chromatin remodeling. The review highlights NEAT1's impact on LC development and progression, including cell processes such as proliferation, migration, invasion, and resistance to therapy, positioning it as a potential diagnostic marker and therapeutic target. The complex web of NEAT1's regulatory interactions with proteins and microRNAs is explored, alongside challenges in targeting it therapeutically. The review concludes optimistically, suggesting future avenues for research and personalized LC therapies, shedding light on NEAT1's crucial role in LC.
description: EXCLI Journal; 23:Doc34; ISSN 1611-2156
Additional file 1 of The efficacy and safety of an adapted opioid-free anesthesia regimen versus conventional general anesthesia in gynecological surgery for low-resource settings: a randomized pilot study
Creators: name: Tochie, Joel Noutakdie
name: Bengono Bengono, Roddy Stephan
name: Metogo, Junette Mbengono
name: Ndikontar, Raymond
name: Ngouatna, Serges
name: Ntock, Ferdinand Ndom
name: Minkande, Jacqueline Ze
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Physiology
subject: 69999 Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Cancer
subject: Science Policy

description: Additional file 1. Quality of Recovery-40 (QoR-40) questionnaire for evaluation of patient’s satisfaction.
Classical and Variational Differentiability of BSDEs with quadratic growth
Creators: name: Ankirchner, Stefan
name: Imkeller, Peter
name: Reis, Goncalo Dos
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H10; 60H07; 65C30

description: We consider Backward Stochastic Differential Equations (BSDE) with generators that grow quadratically in the control variable. In a more abstract setting, we first allow both the terminal condition and the generator to depend on a vector parameter $x$. We give sufficient conditions for the solution pair of the BSDE to be differentiable in $x$. These results can be applied to systems of forward-backward SDE. If the terminal condition of the BSDE is given by a sufficiently smooth function of the terminal value of a forward SDE, then its solution pair is differentiable with respect to the initial vector of the forward equation. Finally we prove sufficient conditions for solutions of quadratic BSDE to be differentiable in the variational sense (Malliavin differentiable).
description: This the revised version
The old globular cluster system of the dIrr galaxy NGC1427A in the Fornax cluster
Creators: name: Georgiev, Iskren Y.
name: Hilker, Michael
name: Puzia, Thomas H.
name: Chaname, Julio
name: Mieske, Steffen
name: Goudfrooij, Paul
name: Reisenegger, Andreas
name: Infante, Leopoldo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a study of the old globular cluster (GC) population of the dwarf irregular galaxy NGC 1427A using multi-wavelength VLT observations in U, B, V, I, H_alpha, J, H, and Ks bands under excellent observing conditions. We applied color and size selection criteria to select old GC candidates and made use of archival ACS images taken with the Hubble Space Telescope to reject contaminating background sources and blended objects from the GC candidates' list. The H_alpha observations were used to check for contamination due to compact, highly reddened young star clusters whose colors and sizes could mimic those of old GCs. After accounting for contamination we obtain a total number of 38+/-8 GC candidates with colors consistent with an old (~10 Gyr) and metal-poor (Z < 0.4xZ_solar) population as judged by simple stellar population models. Our contamination analysis indicates that the density distribution of GCs in the outskirts of the Fornax central cD galaxy NGC1399 may not be spherically symmetric. We derive a present-day specific frequency S_N of 1.6+/-0.23 for NGC 1427A, a value significantly larger than what is observed in the Local Group dwarf irregular galaxies and comparable with the values found for the same galaxy types in the Virgo and Fornax clusters. Assuming a universal globular cluster luminosity function turnover magnitude, we derive a distance modulus to NGC 1427A of 31.01+/-0.21 mag which places it 3.2+/-2.5(statistic)+/-1.6(systematic) Mpc in front of the Fornax central cD galaxy NGC 1399. The implications of this result for the relationship between NGC 1427A and the cluster environment are briefly discussed.
description: 16 pages, 2 tables, 14 figures; accepted for publication in A&A
Learning Order Parameters from Videos of Dynamical Phases for Skyrmions with Neural Networks
Creators: name: Wang, Weidi
name: Wang, Zeyuan
name: Zhang, Yinghui
name: Sun, Bo
name: Xia, Ke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The ability to recognize dynamical phenomena (e.g., dynamical phases) and dynamical processes in physical events from videos, then to abstract physical concepts and reveal physical laws, lies at the core of human intelligence. The main purposes of this paper are to use neural networks for classifying the dynamical phases of some videos and to demonstrate that neural networks can learn physical concepts from them. To this end, we employ multiple neural networks to recognize the static phases (image format) and dynamical phases (video format) of a particle-based skyrmion model. Our results show that neural networks, without any prior knowledge, can not only correctly classify these phases, but also predict the phase boundaries which agree with those obtained by simulation. We further propose a parameter visualization scheme to interpret what neural networks have learned. We show that neural networks can learn two order parameters from videos of dynamical phases and predict the critical values of two order parameters. Finally, we demonstrate that only two order parameters are needed to identify videos of skyrmion dynamical phases. It shows that this parameter visualization scheme can be used to determine how many order parameters are needed to fully recognize the input phases. Our work sheds light on the future use of neural networks in discovering new physical concepts and revealing unknown yet physical laws from videos.
description: 15 pages, 15 figures
Wilson Loops and Area-Preserving Diffeomorphisms in Twisted Noncommutative Gauge Theory
Creators: name: Riccardi, Mauro
name: Szabo, Richard J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use twist deformation techniques to analyse the behaviour under area-preserving diffeomorphisms of quantum averages of Wilson loops in Yang-Mills theory on the noncommutative plane. We find that while the classical gauge theory is manifestly twist covariant, the holonomy operators break the quantum implementation of the twisted symmetry in the usual formal definition of the twisted quantum field theory. These results are deduced by analysing general criteria which guarantee twist invariance of noncommutative quantum field theories. From this a number of general results are also obtained, such as the twisted symplectic invariance of noncommutative scalar quantum field theories with polynomial interactions and the existence of a large class of holonomy operators with both twisted gauge covariance and twisted symplectic invariance.
description: 23 pages
Experience vs Data: A Case for More Data-informed Retrospective Activities
Creators: name: Matthies, Christoph
name: Dobrigkeit, Franziska
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Effective Retrospective meetings are vital for ensuring productive development processes because they provide the means for Agile software development teams to discuss and decide on future improvements of their collaboration. Retrospective agendas often include activities that encourage sharing ideas and motivate participants to discuss possible improvements. The outcomes of these activities steer the future directions of team dynamics and influence team happiness. However, few empirical evaluations of Retrospective activities are currently available. Additionally, most activities rely on team members experiences and neglect to take existing project data into account. With this paper we want to make a case for data-driven decision-making principles, which have largely been adopted in other business areas. Towards this goal we review existing retrospective activities and highlight activities that already use project data as well as activities that could be augmented to take advantage of additional, more subjective data sources. We conclude that data-driven decision-making principles, are advantageous, and yet underused, in modern Agile software development. Making use of project data in retrospective activities would strengthen this principle and is a viable approach as such data can support the teams in making decisions on process improvement.
description: 5th International Conference on Lean and Agile Software Development (LASD 2021). 23 January 2021
SigmaLaw-ABSA: Dataset for Aspect-Based Sentiment Analysis in Legal Opinion Texts
Creators: name: Mudalige, Chanika Ruchini
name: Karunarathna, Dilini
name: Rajapaksha, Isanka
name: de Silva, Nisansa
name: Ratnayaka, Gathika
name: Perera, Amal Shehan
name: Pathirana, Ramesh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Aspect-Based Sentiment Analysis (ABSA) has been prominent and ongoing research over many different domains, but it is not widely discussed in the legal domain. A number of publicly available datasets for a wide range of domains usually fulfill the needs of researchers to perform their studies in the field of ABSA. To the best of our knowledge, there is no publicly available dataset for the Aspect (Party) Based Sentiment Analysis for legal opinion texts. Therefore, creating a publicly available dataset for the research of ABSA for the legal domain can be considered as a task with significant importance. In this study, we introduce a manually annotated legal opinion text dataset (SigmaLaw-ABSA) intended towards facilitating researchers for ABSA tasks in the legal domain. SigmaLaw-ABSA consists of legal opinion texts in the English language which have been annotated by human judges. This study discusses the sub-tasks of ABSA relevant to the legal domain and how to use the dataset to perform them. This paper also describes the statistics of the dataset and as a baseline, we present some results on the performance of some existing deep learning based systems on the SigmaLaw-ABSA dataset.
description: 6 pages, 2 figures, IEEE International Conference on Industrial and Information Systems(ICIIS) 2020
Modulation of heme function by genetic modification of the active site of horse heart myoglobin
Creators: name: Hildebrand, Dean Patrick
Publisher: name: University of British Columbia
Year: 2009

description: Site-directed mutagenesis has been used to construct variants of horse heart myoglobin to probe the structural contributions of specific amino acid residues in the active site of this protein. In particular four groups of variants were examined: (i) The proximal histidine (H93) ligand to the heme iron was substituted with tyrosine and cysteine as occurs in the coordination environments of catalase and cytochrome P-450, respectively, (ii) The distal histidine (H64) was substituted with valine and isoleucine to assess the effects of nonpolar residues on the coordination and ligand binding properties of myoglobin, (iii) Double variants, H64V/H93C and H64I/H93C, were also constructed to study the influence of these substitutions on the ability of the proximal cysteine ligand to ligate to the heme iron, (iv) Insight concerning the functional consequences of increasing the polarity of the distal heme binding pocket was sought through investigation of the V68H and V67A/V68S variants. The influence of mutations on the proximal and distal side of the heme were examined by spectroscopic and electrochemical methods. The electronic, EPR and NMR spectra of the H93 Y ferriMb derivative suggest that the axial ligation of the heme iron in this variant is pentacoordinate, with the heme iron coordinated by a phenolate group provided by the proximal Y93 residue. Unlike the H93Y variant, however, no experimental conditions were identified that allowed quantitative ligation of the proximal cysteine residue to the heme iron in the H93C variant. All of the spectroscopic evidence for the H64V/H93C and H64I/H93C variants, however, supports the assignment of thiolate as the ligand to the heme iron in the oxidized forms of these proteins. With the exception of an additional high-spin component in the electronic absorption spectrum, the V68H Mb variant exhibits absorption maxima similar to those of ferricytochrome b5. Electronic absorption, MCD and EPR spectroscopy of the double variant, V67A/V68S, confirm that the coordination environment of this protein is the same as that of wild-type Mb.The increase in active site polarity may account for the enhancement in the rate of coupled oxidation of heme exhibited by the variant upon aerobic exposure to ascorbate relative to that observed for wildtype myoglobin.
Universal thermodynamics of strongly interacting Fermi gases
Creators: name: Hu, Hui
name: Drummond, Peter D.
name: Liu, Xia-Ji
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Strongly interacting Fermi gases are of great current interest. Not only are fermions the most common particles in the universe, but they are also thought to have a universal thermodynamic behavior for strong interactions \cite{heiselberg,carlson,ho}. Recent experiments on ultra-cold Fermi gases provide an unprecedented opportunity to test universality in the laboratory \cite{hara,thomas,partridge,stewart,luo}. In principle this allows - for example - the interior properties of hot, dense neutron stars to be investigated on earth. Here we carry out a detailed test of this prediction. We analyze results from three ultra-cold fermion experiments involving two completely distinct atomic species in different kinds of atomic trap environments \cite{partridge,stewart,luo}. The data is compared with the predictions of a recent strong interaction theory \cite{hldepl,hldpra}. Excellent agreement is obtained, with no adjustable parameters. By extrapolating to zero temperature, we show that the experimental measurements yield a many-body parameter} $\mathbf{β\simeq-0.59\pm.07}$, \textbf{describing the universal energy of strongly interacting Fermi gases.
description: 5 pages + 3 figures, submitted for publication
An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b
Creators: name: Chen, G.
name: Palle, E.
name: Parviainen, H.
name: Wang, H.
name: van Boekel, R.
name: Murgas, F.
name: Yan, F.
name: Bejar, V. J. S.
name: Casasayas-Barris, N.
name: Crouzet, N.
name: Esparza-Borges, E.
name: Fukui, A.
name: Garai, Z.
name: Kawauchi, K.
name: Kurita, S.
name: Kusakabe, N.
name: de Leon, J. P.
name: Livingston, J.
name: Luque, R.
name: Madrigal-Aguado, A.
name: Mori, M.
name: Narita, N.
name: Nishiumi, T.
name: Oshagh, M.
name: Sanchez-Benavente, M.
name: Tamura, M.
name: Terada, Y.
name: Watanabe, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the optical transmission spectrum of the hot Jupiter WASP-104b based on one transit observed by the blue and red channels of the DBSP spectrograph at the Palomar 200-inch telescope and 14 transits observed by the MuSCAT2 four-channel imager at the 1.52 m Telescopio Carlos Sanchez. We also analyse 45 additional K2 transits, after correcting for the flux contamination from a companion star. Together with the transit light curves acquired by DBSP and MuSCAT2, we are able to revise the system parameters and orbital ephemeris, confirming that no transit timing variations exist. Our DBSP and MuSCAT2 combined transmission spectrum reveals an enhanced slope at wavelengths shorter than 630 nm and suggests the presence of a cloud deck at longer wavelengths. While the Bayesian spectral retrieval analyses favour a hazy atmosphere, stellar spot contamination cannot be completely ruled out. Further evidence, from transmission spectroscopy and detailed characterisation of the host star's activity, is required to distinguish the physical origin of the enhanced slope.
description: 17 pages, 14 figures, accepted for publication in MNRAS
Bound state solution of the Schrodinger equation for Mie potential
Creators: name: Sever, Ramazan
name: Bucurgat, Mahmut
name: Tezcan, Cevdet
name: Yesiltas, Ozlem
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Exact solution of Schrodinger equation for the Mie potential is obtained for an arbitrary angular momentum. The energy eigenvalues and the corresponding wavefunctions are calculated by the use of the Nikiforov-Uvarov method. Wavefunctions are expressed in terms of Jacobi polynomials. The bound states are calculated numerically for some values of l and $n$ with n<5. They are applied to several diatomic molecules.
description: 10 pages
Collisional ionisation, recombination and ionisation potential in two-fluid slow-mode shocks: analytical and numerical results
Creators: name: Snow, B.
name: Hillier, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Shocks are a universal feature of the lower solar atmosphere which consists of both ionised and neutral species. Including partial ionisation leads to a finite-width existing for shocks, where the ionised and neutral species decouple and recouple. As such, drift velocities exist within the shock that lead to frictional heating between the two species, in addition to the adiabatic temperature changes across the shock. The local temperature enhancements within the shock alter the recombination and ionisation rates and hence change the composition of the plasma. We study the role of collisional ionisation and recombination in slow-mode partially-ionised shocks. In particular we incorporate the ionisation potential energy loss and analyse the consequences of having a non-conservative energy equation. A semi-analytical approach is used to determine the possible equilibrium shock jumps for a two-fluid model with ionisation, recombination, ionisation potential and arbitrary heating. Two-fluid numerical simulations are performed using the (P\underline{I}P) code. Results are compared to the MHD model and semi-analytic solution. Accounting for ionisation, recombination and ionisation potential significantly alters the behaviour of shocks in both substructure and post-shock regions. In particular, for a given temperature, equilibrium can only exist for specific densities due to the radiative losses needing to be balanced by the heating function. A consequence of the ionisation potential is that a compressional shock will lead to a reduction of temperature in the post-shock region, rather than the increase seen for MHD. The numerical simulations pair well with the derived analytic model for shock velocities.
description: Submitted to A&A
Objective monitoring of milk quality using a dynamic headspace gas chromatograph and computer-aided data processing
Creators: name: Horimoto, Yasumi
Publisher: name: University of British Columbia
Year: 2009

description: This research was undertaken because of the need to develop an objective method for quality control of milk. A major problem in the dairy industry is off-flavour often found in milk. Quality control of milk is heavily dependent upon sensory evaluations supported by microbiological and chemical analyses. The chief purpose of this research was to demonstrate a simple and economical system for quality control of milk using a gas chromatogf aph and computer-aided data processing. Two experiments were conducted: one using microbial off-flavours and another using chemically induced off-flavours. First, Ultra High Temperature (UHT)-sterilized milk was inoculated with Pseudomonas fragi, Psuedomonas fluorescens, Lactococcus lactis, Enterobacter aerogenes, Bacillus subtilis and a mixed culture (L. lactis: E. aerogenes: P. fragi = 1:1:1) with approximately 10⁴ CFU mL⁻¹. The samples were stored at 4°C up to 10 days for P. fragi and P. fluorescens and at 30°C up to 24 hours for L. lactis, E. aerogenes, B. subtilis and the mixed culture. Several multivariate analyses were applied to the standaridized peak areas of GC data. A new multivariate analysis technique, principal component similarity analysis (PCS), was capable of classifying milk samples with regard to bacterial species and storage time. Artificial neural networks (ANN), partial least squares regression analysis and principal component regression analysis were also applied. ANN provided the most accurate means of classification. Secondly, pasteurized milk was treated to develop different off-flavours (lightinduced, oxidized, cooked and heated) according to the procedures of the American Dairy Science Association. The same pasteurized milk samples as those used for gas chromatographic analysis were used for sensory evaluation. Gas chromatography (GC) combined with PCS was more effective than sensory evaluation as a means of distinguishing milk samples. It was concluded that a combination of GC and chemometric methods may have great potential in evaluating the chemical and microbial quality of milk.
A description of 1/4 BPS configurations in minimal type IIB SUGRA
Creators: name: Donos, Aristomenis
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we present an effort to extend the LLM construction of 1/2 BPS states in minimal IIB supergravity to configurations that preserve 1/4 of the total number of supersymmetries. Following the same techniques we reduce the problem to that of a single scalar which satisfies a non-linear equation. In particular, the scalar is identified to be the Kahler potential with which a four dimensional base space is equipped.
description: Added references
Mesonic screening masses at high temperature and finite density
Creators: name: Vepsalainen, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the first perturbative correction to the static correlation lengths of light quark bilinears in hot QCD with finite quark chemical potentials. The correction is small and positive, with mu-dependence depending on the relative sign of chemical potentials and the number of dynamical flavors. The computation is carried out using a three-dimensional effective theory for the lowest fermionic Matsubara mode. We also compute the full correlator in free theory and find a rather complicated general mu-dependence at shorter distances. Finally, rough comparisons with lattice simulations are discussed.
description: 24 pages, 5 figures, JHEP style. Minor corrections and clarifications, version to appear in JHEP
Deep Reinforcement Learning for Long Term Hydropower Production Scheduling
Creators: name: Riemer-Sorensen, Signe
name: Rosenlund, Gjert H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We explore the use of deep reinforcement learning to provide strategies for long term scheduling of hydropower production. We consider a use-case where the aim is to optimise the yearly revenue given week-by-week inflows to the reservoir and electricity prices. The challenge is to decide between immediate water release at the spot price of electricity and storing the water for later power production at an unknown price, given constraints on the system. We successfully train a soft actor-critic algorithm on a simplified scenario with historical data from the Nordic power market. The presented model is not ready to substitute traditional optimisation tools but demonstrates the complementary potential of reinforcement learning in the data-rich field of hydropower scheduling.
description: 2020 International Conference on Smart Energy Systems and Technologies (SEST)
Immirzi parameter and fermions with non-minimal coupling
Creators: name: Alexandrov, Sergei
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We clarify the role played by the Immirzi parameter in classical gravity coupled to fermions. Considering the general non-minimal coupling, we show that, although the torsion depends explicitly on the Immirzi parameter, in a suitable parametrization the effective action obtained by integrating out the spin-connection is independent of it. Thus the Immirzi parameter is not detectable in classical theory even after coupling of fermions.
description: 4 pages
Analytical results for a Bessel function times Legendre polynomials class integrals
Creators: name: Neves, Antonio Alvaro Ranha
name: Padilha, Lazaro Aurelio
name: Fontes, Adriana
name: Rodriguez, Eugenio
name: Cruz, Carlos Henrique de Brito
name: Barbosa, Luiz Carlos
name: Cesar, Carlos Lenz
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 78A25; 78A97

description: When treating problems of vector diffraction in electromagnetic theory, the evaluation of the integral involving Bessel and associated Legendre functions is necessary. Here we present the analytical result for this integral that will make unnecessary numerical quadrature techniques or localized approximations. The solution is presented using the properties of the Bessel and associated Legendre functions.
description: 4 pages
A methodology for the analysis of melodic accent in Renaissance sacred polyphony
Creators: name: Ethier, Glen Edward
Publisher: name: University of British Columbia
Year: 2009

description: Modern scholars have suggested various approaches to the analysis of the pretonal repertory. However, if we consider the question of how the individual voice parts interact in a Renaissance polyphonic composition to create coherence for the movement as a whole, we find that there are no tools available to undertake such a task. We may be able to speak generally of the arrival of certain moments as relatively accented or unaccented; we may even be able to dissect a complete melodic line with some segmentation process to highlight motivic structure, phrase development or contour-articulated pitch events. But there are no analytic strategies available yet which are capable of disclosing the structures of independent voice parts and their interaction as timepoint-accenting elements capable of creating formal, rhythmic and pitch-class patterns. This study outlines a methodology that has been developed to deal with these specific issues. The analytic strategy is based on the perception of accents in individual voices of polyphonic works. The types of accents germane to Renaissance polyphony include durational, leap, contour, cadential and beginning-accents. The study proposes a simple, bipartite classification of accentual strength—strong or weak. Each voice part in a work is then analyzed, with every pitch attack represented as strongly or weakly accented through special notation developed for the analysis. The methodology affords a picture of the most strongly- accented timepoints in the individual melodies of three- and four-voice cantus firmus masses of the mid- to late fifteenth century. The relative strengths of these accents, along with their synchronization in the multi-voice aggregate, are disclosed through the notation. After renotating scores with this special notational symbology, we extract points of coincident strong accents in three or more voices to create accent profiles for each section of a movement. We then compare profiles of same-texted works by different composers in order to disclose normative formal and pitch-class procedures in some Renaissance compositions.
Network Topology in Water Nanoconfined between Phospholipid Membranes
Creators: name: Martelli, Fausto
name: Crain, Jason
name: Franzese, Giancarlo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Water provides the driving force for the assembly and stability of many cellular components. Despite its impact on biological functions, a nanoscale understanding of the relationship between its structure and dynamics under soft confinement has remained elusive. As expected, water in contact with biological membranes recovers its bulk density and dynamics at $\sim 1$ nm from phospholipid headgroups but surprisingly enhances its intermediate-range order (IRO) over a distance, at least, twice as large. Here, we explore how the IRO is related to the water's hydrogen bond network (HBN) and its coordination defects. We characterize the increased IRO by an alteration of the HBN up to more than eight coordination shells of hydration water. The HBN analysis emphasizes the existence of a bound-unbound water interface at $\sim 0.8$ nm from the membrane. The unbound water has a distribution of defects intermediate between bound and bulk water, but with density and dynamics similar to bulk, while bound water has reduced thermal energy and much more HBN defects than low-temperature water. This observation could be fundamental for developing nanoscale models of biological interactions and for understanding how alteration of the water structure and topology, for example, due to changes in extracellular ions concentration, could affect diseases and signaling. More generally, it gives us a different perspective to study nanoconfined water.
Quantum Mechanical Treatment of the Problem of Constraints in Nonextensive Formalism Revisited
Creators: name: Bagci, Gokhan B.
name: Arda, Altug
name: Sever, Ramazan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The purity of Werner state in nonextensive formalism associated with two different constraints has been calculated in a previous paper by G. B. Bagci et al. [G. B. Bagci et al., Int. J. Mod. Phys. 20, 2085 (2006)]. Two different results have been obtained corresponding to ordinary probability and escort probability whereas the former has been shown to result in negative values thereby leading authors to deduce the advantage of escort probabilities over ordinary probabilities. However, this results have been only for a limited interval of q values which lie between 0 and 1. In this paper, we solve the same problem for all values of nonextensive index q by using a perturbative approach and show that the simultaneous use of both types of constraint is necessary in order to obtain the solution for whole spectrum of nonextensive index. In this sense, the existence of these different constraints in nonextensive formalism must not be seen as a deficiency in the formalism but rather must be welcomed as a means of providing solution for all values of parameter q.
description: 7 pages
Novel Architectures for Unsupervised Information Bottleneck based Speaker Diarization of Meetings
Creators: name: Dawalatabad, Nauman
name: Madikeri, Srikanth
name: Sekhar, C. Chandra
name: Murthy, Hema A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Audio and Speech Processing (eess.AS)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Speaker diarization is an important problem that is topical, and is especially useful as a preprocessor for conversational speech related applications. The objective of this paper is two-fold: (i) segment initialization by uniformly distributing speaker information across the initial segments, and (ii) incorporating speaker discriminative features within the unsupervised diarization framework. In the first part of the work, a varying length segment initialization technique for Information Bottleneck (IB) based speaker diarization system using phoneme rate as the side information is proposed. This initialization distributes speaker information uniformly across the segments and provides a better starting point for IB based clustering. In the second part of the work, we present a Two-Pass Information Bottleneck (TPIB) based speaker diarization system that incorporates speaker discriminative features during the process of diarization. The TPIB based speaker diarization system has shown improvement over the baseline IB based system. During the first pass of the TPIB system, a coarse segmentation is performed using IB based clustering. The alignments obtained are used to generate speaker discriminative features using a shallow feed-forward neural network and linear discriminant analysis. The discriminative features obtained are used in the second pass to obtain the final speaker boundaries. In the final part of the paper, variable segment initialization is combined with the TPIB framework. This leverages the advantages of better segment initialization and speaker discriminative features that results in an additional improvement in performance. An evaluation on standard meeting datasets shows that a significant absolute improvement of 3.9% and 4.7% is obtained on the NIST and AMI datasets, respectively.
description: Accepted in IEEE/ACM TRANSACTIONS ON AUDIO, SPEECH, AND LANGUAGE PROCESSING
Photon blockade induced Mott transitions and XY spin models in coupled cavity arrays
Creators: name: Angelakis, Dimitris G.
name: Santos, Marcelo F.
name: Bose, Sougato
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: As photons do not interact with each other, it is interesting to ask whether photonic systems can be modified to exhibit the phases characteristic of strongly coupled many-body systems. We demonstrate how a Mott insulator type of phase of excitations can arise in an array of coupled electromagnetic cavities, each of which is coupled resonantly to a {\em single} two level system (atom/quantum dot/Cooper pair) and can be individually addressed from outside. In the Mott phase each atom-cavity system has the same integral number of net polaritonic (atomic plus photonic) excitations with photon blockade providing the required repulsion between the excitations in each site. Detuning the atomic and photonic frequencies suppresses this effect and induces a transition to a photonic superfluid. We also show that for zero detuning, the system can simulate the dynamics of many body spin systems.
description: 4 pages, 3 figures
Approximate Simultaneous Diagonalization of Matrices via Structured Low-Rank Approximation
Creators: name: Akema, Riku
name: Yamagishi, Masao
name: Yamada, Isao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: Signal Processing (eess.SP)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Approximate Simultaneous Diagonalization (ASD) is a problem to find a common similarity transformation which approximately diagonalizes a given square-matrix tuple. Many data science problems have been reduced into ASD through ingenious modelling. For ASD, the so-called Jacobi-like methods have been extensively used. However, the methods have no guarantee to suppress the magnitude of off-diagonal entries of the transformed tuple even if the given tuple has a common exact diagonalizer, i.e., the given tuple is simultaneously diagonalizable. In this paper, to establish an alternative powerful strategy for ASD, we present a novel two-step strategy, called Approximate-Then-Diagonalize-Simultaneously (ATDS) algorithm. The ATDS algorithm decomposes ASD into (Step 1) finding a simultaneously diagonalizable tuple near the given one; and (Step 2) finding a common similarity transformation which diagonalizes exactly the tuple obtained in Step 1. The proposed approach to Step 1 is realized by solving a Structured Low-Rank Approximation (SLRA) with Cadzow's algorithm. In Step 2, by exploiting the idea in the constructive proof regarding the conditions for the exact simultaneous diagonalizability, we obtain a common exact diagonalizer of the obtained tuple in Step 1 as a solution for the original ASD. Unlike the Jacobi-like methods, the ATDS algorithm has a guarantee to find a common exact diagonalizer if the given tuple happens to be simultaneously diagonalizable. Numerical experiments show that the ATDS algorithm achieves better performance than the Jacobi-like methods.
S-wave and p-wave scattering in a cold gas of Na and Rb atoms
Creators: name: Ouerdane, Henni
name: Jamieson, Michael J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Using improved experimentally based $X{}^1Σ^+$ and $a{}^3Σ^+$ molecular potentials of NaRb, we apply the variable phase method to compute new data for low energy scattering of $^{23}$Na atoms by $^{85}$Rb atoms and $^{87}$Rb atoms. These are the scattering lengths and volumes, numbers of bound states and effective ranges, which we use to obtain the low energy spin-change cross section as functions of the system temperature and the isotope masses. From an analysis of the contributions of s-wave and p-wave scatterings to the elastic cross section we estimate temperatures below which only s-wave scattering is dominant. We compare our quantal results to data obtained from the semiclassical approximation. We supply evidence for the existence of a near zero energy p-wave bound state supported by the singlet molecular potential.
description: The article contains additional material and data (see abstract)
Subthreshold resonance in central neurons
Creators: name: Hutcheon, Bruce McCullagh
Publisher: name: University of British Columbia
Year: 2009

description: Electrical signals from the mammalian brain often contain large-amplitude components at characteristic frequencies. What properties of central neuronal networks determine these frequencies? One possibility is that individual neurons are electrically tuned to respond better at some frequencies than others. Such tuning has been called electrical membrane resonance and arises from the interaction of the passive properties of the membrane with time- and voltagedependent membrane currents. In the present work, frequency-domain analyses of neocortical and thalamic neurons were performed to detect resonances at subthreshold potentials. The ionic mechanisms of these resonances and their effect on firing patterns were then examined using a combination of mathematical modeling and experiment. In addition, a novel technique, the reactive current clamp (RCC), was developed for coupling mathematical models of ionic currents to living cells. In approximately 2/3 of neocortical neurons, the hyperpolarization-activated cation current (I[sub]H) caused a 1 to 2 Hertz resonance near the resting potential. Other currents in these neurons attenuated or amplified the resonance in a voltage-dependent manner. Putative inhibitory neurons of the neocortex did not have an In-resonance. The resonance affected neuronal firing patterns. When resonant neocortical neurons were injected with swept-frequency sinusoidal currents, they were most likely to fire action potentials as the input swept through the resonant band; a phenomenon called "frequency-selective firing". In nonresonant neurons, resonance and frequency-selective firing were generated when a model of IH was coupled to the neuron using the RCC. A theoretical analysis based on previously published data showed that a different voltagedependent current, the low-threshold calcium current (I[sub]T), accounts for the 2 to 4 Hz resonance observed in thalamic neurons. In these neurons, spontaneous oscillations of the membrane potential have been observed near the same frequency. It is suggested that spontaneous oscillations arise from resonant mechanisms that are amplified by voltage-dependent currents. In conclusion, subthreshold resonance is an intrinsic property of neurons that may control the frequencies of coordinated activities in neuronal networks. The resonances described here have frequency ranges that are suitable for stabilizing the spindle and delta brain rhythms that arise during sleep in mammals. In the neocortex, this mechanism seems to be limited to excitatory neurons.
คุณค่าของรายงานผู้สอบบัญชีแบบใหม่
Creators: name: ชาญชัย ตั้งเรือนรัตน์
Publisher: name: คณะพาณิชยศาสตร์และการบัญชี มหาวิทยาลัยธรรมศาสตร์
Year: 2015
Subjects: รายงานของผู้สอบบัญชี, ผู้สอบบัญชี, ISA700 (ปรับปรุง)

description: 31 (สิงหาคม 58), 11, วารสารวิชาชีพบัญชี JAP