cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Improving phase estimation using the number-conserving operations
Creators: name: Zhang, Huan
name: Ye, Wei
name: Wei, Chaoping
name: Liu, Cunjin
name: Liao, Zeyang
name: Hu, Liyun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a theoretical scheme to improve the resolution and precision of phase measurement with parity detection in the Mach-Zehnder interferometer by using a nonclassical input state which is generated by applying a number-conserving generalized superposition of products (GSP) operation, (saa^{†}+ta^{†}a)^{m} with s^2+t^2=1, on two-mode squeezed vacuum (TMSV) state. The nonclassical properties of the proposed GSP-TMSV are investigated via average photon number (APN), anti-bunching effect, and degrees of two-mode squeezing. Particularly, our results show that both higher-order m GSP operation and smaller parameter s can increase the total APN, which leads to the improvement of quantum Fisher information. In addition, we also compare the phase measurement precision with and without photon losses between our scheme and the previous photon subtraction/addition schemes. It is found that our scheme, especially for the case of s=0, has the best performance via the enhanced phase resolution and sensitivity when comparing to those previous schemes even in the presence of photon losses. Interestingly, without losses, the standard quantum-noise limit (SQL) can always be surpassed in our our scheme and the Heisenberg limit (HL) can be even achieved when s=0.5,1 with small total APNs. However, in the presence of photon losses, the HL cannot be beaten, but the SQL can still be overcome particularly in the large total APN regimes. Our results here can find important applications in quantum metrology.
description: 15 pages, 18 figures
On the weakness of disc models in bright ULXs
Creators: name: Goncalves, Anabela C.
name: Soria, Roberto
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: It is sometimes suggested that phenomenological power-law plus cool disc-blackbody models represent the simplest, most robust interpretation of the X-ray spectra of bright ultraluminous X-ray sources (ULXs); this has been taken as evidence for the presence of intermediate-mass black holes (BHs) (M ~ 10^3 Msun) in those sources. Here, we assess this claim by comparing the cool disc-blackbody model with a range of other models. For example, we show that the same ULX spectra can be fitted equally well by subtracting a disc-blackbody component from a dominant power-law component, thus turning a soft excess into a soft deficit. Then, we propose a more complex physical model, based on a power-law component slightly modified at various energies by smeared emission and absorption lines from highly-ionized, fast-moving gas. We use the XMM-Newton/EPIC spectra of two ULXs in Holmberg II and NGC 4559 as examples. Our main conclusion is that the presence of a soft excess or a soft deficit depends on the energy range over which we choose to fit the ``true'' power-law continuum; those small deviations from the power-law spectrum are well modelled by disc-blackbody components (either in emission or absorption) simply because they are a versatile fitting tool for most kinds of smooth, broad bumps. Hence, we argue that those components should not be taken as evidence for accretion disc emission, nor used to infer BH masses. Finally, we speculate that bright ULXs could be in a spectral state similar to (or an extension of) the steep-power-law state of Galactic BH candidates, in which the disc is now completely comptonized and not directly detectable, and the power-law emission may be modified by the surrounding, fast-moving, ionized gas.
description: 12 pages, accepted by MNRAS
Stanowisko Metoecus paradoxus (Linnaeus, 1758) (Coleoptera: Ripiphoridae) w Bieszczadach
Creators: name: Przemysław Żurawlew
Publisher: name: Zenodo
Year: 2024
Subjects: new record, Poland, wedge-shaped beetle

description: Locality of Metoecus paradoxus (Linnaeus, 1758) (Coleoptera: Ripiphoridae) in the Bieszczady Mountains.The note provides the first information about the occurrence of Metoecus paradoxus in the Bieszczady Mountains. One male was photographed on the wall of a wooden summer house in Lutowiska. The numerous occurrence of potential hosts of this beetle from the family Vespidae may indirectly indicate a much more frequent occurrence of M. pardoxus in this area.
Hartree-Fock Critical Nuclear Charge in Two-Electron Atoms
Creators: name: Burton, Hugh G. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Electron correlation effects play a key role in stabilising two-electron atoms near the critical nuclear charge, representing the smallest charge required to bind two electrons. However, deciphering the importance of these effects relies on fully understanding the uncorrelated Hartree-Fock description. Here, we investigate the properties of the ground state wave function in the small nuclear charge limit using various symmetry-restricted Hartree-Fock formalisms. We identify the nuclear charge where spin-symmetry breaking occurs to give an unrestricted wave function that predicts the ionisation of an electron. We also discover another critical nuclear charge where the closed-shell electron density detaches from the nucleus, and identify the importance of fractional spin errors and static correlation in this limit.
description: 7 pages, 4 figures
Spectroscopic Detection of the Pre-White Dwarf Companion of Regulus
Creators: name: Gies, Douglas R.
name: Lester, Kathryn V.
name: Wang, Luqian
name: Couperus, Andrew
name: Shepard, Katherine
name: Neiner, Coralie
name: Wade, Gregg A.
name: Dunham, David W.
name: Dunham, Joan B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Mass transfer in an interacting binary will often strip the mass donor of its entire envelope and spin up the mass gainer to near critical rotation. The nearby B-type star Regulus represents a binary in the post-mass transfer stage: it is a rapid rotator with a very faint companion in a 40 d orbit. Here we present the results of a search for the spectral features of the stripped-down star in an extensive set of high S/N and high resolution spectra obtained with the CFHT/ESPaDOnS and TBL/NARVAL spectrographs. We first determine revised orbital elements in order to set accurate estimates of the orbital Doppler shifts at the times of observation. We then calculate cross-correlation functions of the observed and model spectra, and we search for evidence of the companion signal in the residuals after removal of the strong primary component. We detect a weak peak in the co-added residuals that has the properties expected for a faint pre-white dwarf. We use the dependence of the peak height and width on assumed secondary velocity semiamplitude to derive the semiamplitude, which yields masses of $M_1/M_\odot = 3.7 \pm 1.4$ and $M_2/M_\odot = 0.31 \pm 0.10$ (assuming orbital inclination equals the spin inclination of Regulus). We estimate the pre-white dwarf temperature $T_{\rm eff} = (20 \pm 4)$~kK through tests with differing temperature model spectra, and we find the radius $R_2/R_\odot = 0.061 \pm 0.011$ from the component temperatures and the flux ratio associated with the amplitude of the signal in the cross-correlation residuals.
description: Accepted for publication in ApJ
Squeezing in the weakly interacting uniform Bose condensate
Creators: name: Haque, Masudul
name: Ruckenstein, Andrei E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate the presence of squeezing in the weakly repulsive uniform Bose gas, in both the condensate mode and in the nonzero opposite-momenta mode pairs, using two different variational formulations. We explore the U(1) symmetry breaking and Goldstone's theorem in the context of a squeezed coherent variational wavefunction, and present the associated Ward identity. We show that squeezing of the condensate mode is absent at the mean field Hartree-Fock-Bogoliubov level and emerges as a result of fluctuations about mean field as a finite volume effect, which vanishes in the thermodynamic limit. On the other hand, the squeezing of the excitations about the condensate survives the thermodynamic limit and is interpreted in terms of density-phase variables using a number-conserving formulation of the interacting Bose gas.
description: 8 pages, 3 figures. Version 2 (Sept'06): expanded discussions
Rotating filament in Orion B: Do cores inherit their angular momentum from their parent filament?
Creators: name: Hsieh, Cheng-Han
name: Arce, Héctor G.
name: Mardones, Diego
name: Kong, Shuo
name: Plunkett, Adele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Angular momentum is one of the most important physical quantities that govern star formation. The initial angular momentum of a core may be responsible for its fragmentation and can have an influence on the size of the protoplanetary disk. To understand how cores obtain their initial angular momentum, it is important to study the angular momentum of filaments where they form. While theoretical studies on filament rotation have been explored, there exist very few observational measurements of the specific angular momentum in star-forming filaments. We present high-resolution N2D+ ALMA observations of the LBS 23 (HH24-HH26) region in Orion B, which provide one of the most reliable measurements of the specific angular momentum in a star-forming filament. We find the total specific angular momentum ($4 \times 10^{20} cm^2s^{-1}$), the dependence of the specific angular momentum with radius (j(r) $\propto r^{1.83}$), and the ratio of rotational energy to gravitational energy ($β_{rot} \sim 0.04$) comparable to those observed in rotating cores with sizes similar to our filament width ($\sim$ 0.04 pc) in other star-forming regions. Our filament angular momentum profile is consistent with rotation acquired from ambient turbulence and with simulations that show cores and their host filaments develop simultaneously due to the multi-scale growth of nonlinear perturbation generated by turbulence.
description: accepted by ApJ, 2020.12.1
Additional file 1 of Annotating and detecting topics in social media forum and modelling the annotation to derive directions-a case study
Creators: name: Athira, B.
name: Jones, Josette
name: Sumam Mary Idicula
name: Kulanthaivel, Anand
name: Enming Zhang
Publisher: name: figshare
Year: 2021
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1: Appendix 1. Forum names and sample post with given labels.
A fast microRNA target prediction tool that provides a single-entry interface to multiple algorithms
Creators: name: Saito, Takaya
name: Rehmsmeier, Marc
Publisher: name: F1000Research
Year: 2015

description: MicroRNA (miRNA) is a class of small non-coding RNAs that post-transcriptionally repress the expression of protein coding mRNAs. Finding effective miRNA targets – mRNAs with their protein expression repressed by miRNA binding – has been one of the most challenging fields in bioinformatics.

In recent years, tools that combine several algorithms to predict miRNA targets have gained popularity rather than relying on a single tool. Nonetheless, the majority of such tools are web-based to provide pre-calculated predictions.

Here, we have re-implemented six popular miRNA target prediction algorithms – TargetScan, RNAhybrid, miRanda, PITA, TargetMiner, and Two-step SVM – with C++ template libraries, such as SeqAn and Eigen. Each re-implemented algorithm is 3-40 times faster than the original.

The main goal of our tool is to provide a single-entry interface to multiple algorithms with fast computational time.
Predicting quasibound states of negative ions
Creators: name: Safronova, M. S.
name: Cheung, C.
name: Kozlov, M. G.
name: Spielman, S. E.
name: Gibson, N. D.
name: Walter, C. W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrated the accurate prediction of a quasibound spectrum of a negative ion using a novel high-precision theoretical approach. We used La$^-$ as a test case due to a recent experiment that measured energies of 11 resonances in its photodetachment spectrum attributed to transitions to quasibound states [C. W. Walter et al., PRA, in press (2020); arXiv:2010.01122]. We identified all of the observed resonances, and predicted one more peak just outside the range of the prior experiment. Following the theoretical prediction, the peak was observed at the predicted wavelength, validating the identification. The same approach is applicable to a wide range of negative ions. Moreover, theory advances reported in this work can be used for massive generation of atomic transition properties for neutrals and positive ions needed for a variety of applications.
description: 6 pages, 3 figures
Additional file 2 of Annotating and detecting topics in social media forum and modelling the annotation to derive directions-a case study
Creators: name: Athira, B.
name: Jones, Josette
name: Sumam Mary Idicula
name: Kulanthaivel, Anand
name: Enming Zhang
Publisher: name: figshare
Year: 2021
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 2: Appendix 2. TF-IDF, word2vec, doc2vec and BERT.
Glassy behavior in the ferromagnetic and the non-magnetic insulating states of the rare earth manganates, Ln0.7Ba0.3MnO3 (Ln = Nd or Gd)
Creators: name: Kundu, Asish K.
name: Nordblad, P.
name: Rao, C. N. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: While La0.7Ba0.3MnO3 is a ferromagnetic metal (TC = 340 K) with longrange ordering, Nd0.7Ba0.3MnO3 shows a transition around 150 K with a small increase in magnetization, but remains an insulator at all temperatures. Gd0.7Ba0.3MnO3 is non-magnetic and insulating at all temperatures. Low field dc magnetization and ac susceptibility measurements reveal the presence of a transition at around 150 K in Nd0.7Ba0.3MnO3, and a complex behavior with different ordering/freezing transitions at 62, 46 and 36 K in the case of Gd0.7Ba0.3MnO3, the last one being more prominent. The nature of the field dependence of the magnetization, combined with the slow magnetic relaxation, ageing and memory effects, suggests that Nd0.7Ba0.3MnO3 is a cluster glass below 150 K, a situation similar to that found for La_{1-x}SrxCoO3. Gd0.7Ba0.3MnO3, however, shows non-equilibrium dynamics characteristic of spin glasses, below 36 K. The difference in nature of the glassy behavior between Gd0.7Ba0.3MnO3 and Nd0.7Ba0.3MnO3 probably arises because of the larger disorder arising from the mismatch between the sizes of the A-site cations in the former. Our results on Nd0.7Ba0.3MnO3 and Gd0.7Ba0.3MnO3 suggest that the magnetic insulating states often reported for rare earth manganates of the type Ln1-xAxMnO3 (Ln = rare earth, A = alkaline earth) are likely to be associated with glassy magnetic behavior.
description: 20 pages including figures
Flavor Tagging at Tevatron incl. calibration and control
Creators: name: Moulik, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: This report summarizes the flavor tagging techniques developed at the CDF and DØexperiments. Flavor tagging involves identification of the B meson flavor atproduction, whether its constituent is a quark or an anti-quark. It is crucial for measuring the oscillation frequency of neutral B mesons, both in the B^0 and B_S system. The two experiments have developed their unique approaches to flavor tagging, using neural networks, and likelihood methods to disentangle tracks from $b$ decays from other tracks. This report discusses these techniques and the measurement of B^0 mixing, as a means to calibrate the taggers.
description: 6 pages, 7 Figures, Write-up for Beauty 2006 Conference proceedings
title: Welsh Onion, Japanese Bunching Onion :
title: Guidelines for the Conduct of Tests for Distinctness, Uniformity and Stability.
titleType: Subtitle
Creators: name: International Union For The Protection Of New Varieties Of Plants,
Publisher: name: International Union for the Protection of New Varieties of Plants,
Year: 0
Subjects: Welsh Onion
Group identity.
New Varieties of Plants
Japanese Bunching Onions

description: The purpose of these guidelines (“Test Guidelines”) is to elaborate the principles contained in the General Introduction (document TG/1/3), and its associated TGP documents, into detailed practical guidance for the harmonized examination of distinctness, uniformity and stability (DUS) and, in particular, to identify appropriate characteristics for the examination of DUS and production of harmonized variety descriptions.
Sensitivity estimation for calculated phase equilibria
Creators: name: Otis, Richard
name: Bocklund, Brandon
name: Liu, Zi-Kui
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The development of a consistent framework for Calphad model sensitivity is necessary for the rational reduction of uncertainty via new models and experiments. In the present work, a sensitivity theory for Calphad was developed, and a closed-form expression for the log-likelihood gradient and Hessian of a multi-phase equilibrium measurement was presented. The inherent locality of the defined sensitivity metric was mitigated through the use of Monte Carlo averaging. A case study of the Cr-Ni system was used to demonstrate visualizations and analyses enabled by the developed theory. Criteria based on the classical Cramér-Rao bound were shown to be a useful diagnostic in assessing the accuracy of parameter covariance estimates from Markov Chain Monte Carlo. The developed sensitivity framework was applied to estimate the statistical value of phase equilibria measurements in comparison with thermochemical measurements, with implications for Calphad model uncertainty reduction.
description: 32 pages, 10 figures. Supplementary files at https://osf.io/2s35f/
Mixing and non-mixing local minima of the entropy contrast for blind source separation
Creators: name: Vrins, F.
name: Pham, D. -T.
name: Verleysen, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper, both non-mixing and mixing local minima of the entropy are analyzed from the viewpoint of blind source separation (BSS); they correspond respectively to acceptable and spurious solutions of the BSS problem. The contribution of this work is twofold. First, a Taylor development is used to show that the \textit{exact} output entropy cost function has a non-mixing minimum when this output is proportional to \textit{any} of the non-Gaussian sources, and not only when the output is proportional to the lowest entropic source. Second, in order to prove that mixing entropy minima exist when the source densities are strongly multimodal, an entropy approximator is proposed. The latter has the major advantage that an error bound can be provided. Even if this approximator (and the associated bound) is used here in the BSS context, it can be applied for estimating the entropy of any random variable with multimodal density.
description: 11 pages, 6 figures, To appear in IEEE Transactions on Information Theory
Chirality memory stored in magnetic domain walls in the ferromagnetic state of MnP
Creators: name: Jiang, N.
name: Nii, Y.
name: Arisawa, H.
name: Saitoh, E.
name: Onose, Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Chirality in a helimagnetic structure is determined by the sense of magnetic moment rotation. We found that the chiral information did not disappear even after the phase transition to the high-temperature ferromagnetic phase in a helimagnet MnP. The 2nd harmonic resistivity $ρ^{\rm 2f}$, which reflects the breaking down of mirror symmetry, was found to be almost unchanged after heating the sample above the ferromagnetic transition temperature and cooling it back to the helimagnetic state. The application of a magnetic field along the easy axis in the ferromagnetic state quenched the chirality-induced $ρ^{\rm 2f}$. This indicates that the chirality memory effect originated from the ferromagnetic domain walls.
description: 8 pages, 8 figures
Impact of three years of data from the Wilkinson Microwave Anisotropy Probe on cosmological models with dynamical dark energy
Creators: name: Doran, Michael
name: Robbers, Georg
name: Wetterich, Christof
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The first three years of observation of the Wilkinson Microwave Anisotropy Probe (WMAP) have provided the most precise data on the anisotropies of the cosmic microwave background (CMB) to date. We investigate the impact of these results and their combination with data from other astrophysical probes on cosmological models with a dynamical dark energy component. By considering a wide range of such models, we find that the constraints on dynamical dark energy are significantly improved compared to the first year data.
description: 5 pages, 2 figures; v2: more explanatory title, added references, minor clarifications, matches published version
Orbits and Attractors for N=2 Maxwell-Einstein Supergravity Theories in Five Dimensions
Creators: name: Ferrara, Sergio
name: Gunaydin, Murat
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: BPS and non-BPS orbits for extremal black-holes in N=2 Maxwell-Einstein supergravity theories (MESGT) in five dimensions were classified long ago by the present authors for the case of symmetric scalar manifolds. Motivated by these results and some recent work on non-supersymmetric attractors we show that attractor equations in N=2 MESGTs in d=5 do indeed possess the distinct families of solutions with finite Bekenstein-Hawking entropy. The new non-BPS solutions have non-vanishing central charge and matter charge which is invariant under the maximal compact subgroup of the stabilizer of the non-BPS orbit. Our analysis covers all symmetric space theories G/H such that G is a symmetry of the action. These theories are in one-to-one correspondence with (Euclidean) Jordan algebras of degree three. In the particular case of N=2 MESGT with scalar manifold SU*(6)/USp(6) a duality of the two solutions with regard to N=2 and N=6 supergravity is also considered.
description: Added a footnote on notation and comments on the attactor nature of non BPS solutions in section 5. Typos corrected. Version to appear in NPB. Latex file, 24 pages
Discrete spectrum Radiation from a charged particle moving in a medium with Maxwell fish eye refraction index profile
Creators: name: Gevorkian, Zhyrair
name: Davtyan, Mher
Publisher: name: arXiv
Year: 2020
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Radiation from a charged particle moving in a medium with Maxwell fish eye refraction index profile is considered. It is shown that the radiation spectrum has a discrete character. The main emitted wavelength is proportional to the refractive profiles radius and has a dipole character in a regular medium. Cherenkov like threshold velocity is established. A cardinal rearrangement of angular distribution in a lossless medium is predicted. This behavior is caused by the total internal reflection in a lossless medium as opposed to photons attenuated total reflection in the regular medium. Lossless medium ensures that both directed and monochromatic emission can serve as a light source in the corresponding regions.
description: 13 pages, 4 figures
Καμπύλες τρωτότητας κτιρίων Οπλισμένου Σκυροδέματος λόγω κατολίσθησης πρανούς:
Creators: name: Στοϊκίδου, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Τρωτότητα
Κατολίσθηση πρανούς
Πλαίσιο Ο/Σ
Vulnerability
Slope landslides
Rc frame

description: Σκοπός της παρούσας διπλωματικής είναι η εκτίμηση της τρωτότητας πλαισίων από οπλισμένο σκυρόδεμα, λόγω κατολισθήσεων πρανούς. Η τρωτότητα εκφράζεται μέσω καμπυλών τρωτότητας για συγκεκριμένα επίπεδα βλάβης. Στην παρούσα διπλωματική οι καμπύλες τρωτότητας έχουν ορίζονται ως η πιθανότητα να ξεπεραστούν επίπεδα βλάβης έναντι μετακινήσεων πρανούς (κατολισθήσεων). Για αυτό το σκοπό, έχουν πραγματοποιηθεί αποσυζευγμένες αναλύσεις δυο βημάτων. Στο πρώτο βήμα υπολογίζονται οι διαφορικές μετακινήσεις στη βάση ενός κτιρίου, τοποθετημένου κοντά στη στέψη πρανούς, με τη χρήση του λογισμικού GEFDYN (nonlinear finite element serial program). Στο πρώτο βήμα, το κτίριο συμμετέχει μόνο με την θεμελίωση του. Θεωρήθηκε μια κυκλική περιοχή αστοχίας πλάτους 6m, κατά μήκος της οποίας επιβλήθηκαν μια σειρά από μετακινήσεις. Χρησιμοποιήθηκαν εδαφικά μοντέλα διαφορετικά σε γεωμετρία και στα εδαφικά χαρακτηριστικά. Στο δεύτερο βήμα των αναλύσεων, οι διαφορικές μετακινήσεις που υπολογίστηκαν επιβλήθηκαν ως καταναγκασμοί στη βάση ενός πλαισίου, ώστε να εκτιμηθεί η απόκριση του. Για το σκοπό αυτό χρησιμοποιήθηκε ένα μονώροφο πλαίσιο οπλισμένου σκυροδέματος ενός ανοίγματος με συνεχή θεμελίωση. Ορίστηκαν 4 στάθμες βλάβης βασιζόμενες στην παραμόρφωση των υλικών του κτιρίου (material strain). Οι αναλύσεις πραγματοποιήθηκαν με το λογισμικό SEISMOSTRUCT (Seismosoft, 2005), (α fiber-based finite element code).
description: The aim of the present diploma thesis is to assess the vulnerability of RC frame buildings exposed to slow-moving earth-slide. The vulnerability is defined through probabilistic fragility curves for specified limit states. The fragility curves are computed in terms of the probability of exceedance of each limit state versus the slope displacements. A two-step uncoupled analysis is conducted. In the first step, the differential displacements at the foundation level of a building, located on top of the slope crest, are estimated, using the nonlinear finite element serial program GEFDYN. For that, different time-history analyses were applied in a circular area of 6 meters width along slope models, different in geometry and soil properties. In the second step, the calculated differential displacements at the building foundation level are applied as input to building’s foundation model to assess the building’s response. Limit states are defined in terms of a threshold value of building’s material strain. The developed methodology is applied to one-bay one-storey RC frame buildings with continuous foundation. The numerical analyses are performed using the fiber-based finite element code SEISMOSTRUCT (Seismosoft, 2005). The estimation of the building response is evaluated through 4 limit states, defined in terms of threshold strain values. The vulnerability is then expressed as the probability of exceeding a given limit state for slope displacement imposed to the model.
Imaging Scattered Light from the Youngest Protostars in L1448: Signatures of Outflows
Creators: name: Tobin, John J.
name: Looney, Leslie W.
name: Mundy, Lee G.
name: Kwon, Woojin
name: Hamidouche, Murad
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present deep IRAC images that highlight the scattered light emission around many of the youngest protostars, the so-called Class 0 sources, in L1448. By comparison of the data with a Monte Carlo radiative transfer code \citep{whitney2003a}, we demonstrate for the first time that the observed infrared light from these objects is consistent with scattered light from the central protostar. The scattered light escapes out the cavity, carved by molecular outflows, in the circumstellar envelope. In particular, we observe prominent scattered light nebulae associated with the Class 0 sources: L1448-mm, L1448 IRS 2, and 3B, as well as a Class I source: IRS 3A. We use a grid of models with probable protostellar properties to generate model spectral energy distributions (SEDs) and images for bands sensitive to this scattered light: J, H, Ks, and \textit{Spitzer} IRAC bands. By simultaneously fitting SEDs and images of the outflow cavities, we are able to model geometric parameters, i.e. inclination angle and opening angle, and loosely constrain physical parameters. The opening angle may be an important indicator of the evolutionary state of a source. We compare our results for Class 0 sources to similar studies of Class I sources. There may be a transition phase from Class 0 to Class I when a source has an opening angle between 20$^o$ to 30$^o$. It is important to note that while the best fit model image and SED do not fully describe the sources, the fits generally describe the circumstellar structure of Class 0 sources in L1448.
description: Accepted ApJ, 42 pages, 13 figures
Deformations of Euclidean Supersymmetries
Creators: name: Zupnik, B. M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider quantum supergroups that arise in non-anticommutative deformations of N=(1/2,1/2) and N=(1,1) four-dimensional Euclidean supersymmetric theories. Twist operators in the corresponding deformed algebras of superfields contain left spinor generators. We show that non-anticommutative $\star$-products of superfields transform covariantly in the deformed supersymmetries. This covariance guarantees the invariance of deformed superfield actions of models involving $\star$-products of superfields.
description: Latex file, 19 pages; v.2 corrected version, reference added
Measurement of breast-tissue x-ray attenuation by spectral mammography: solid lesions
Creators: name: Fredenberg, Erik
name: Kilburn-Toppin, Fleur
name: Willsher, Paula
name: Moa, Elin
name: Danielsson, Mats
name: Dance, David R.
name: Young, Kenneth C.
name: Wallis, Matthew G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Medical Physics (physics.med-ph)
subject: Image and Video Processing (eess.IV)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Knowledge of x-ray attenuation is essential for developing and evaluating x-ray imaging technologies. For instance, techniques to distinguish between cysts and solid tumours at mammography screening would be highly desirable to reduce recalls, but the development requires knowledge of the x-ray attenuation for cysts and tumours. We have previously measured the attenuation of cyst fluid using photon-counting spectral mammography. Data on x-ray attenuation for solid breast lesions are available in the literature, but cover a relatively wide range, likely caused by natural spread between samples, random measurement errors, and different experimental conditions. In this study, we have adapted the previously developed spectral method to measure the linear attenuation of solid breast lesions. A total of 56 malignant and 5 benign lesions were included in the study. The samples were placed in a holder that allowed for thickness measurement. Spectral (energy-resolved) images of the samples were acquired and the image signal was mapped to equivalent thicknesses of two known reference materials, which can be used to derive the x-ray attenuation as a function of energy. The spread in equivalent material thicknesses was relatively large between samples, which is likely to be caused mainly by natural variation and only to a minor extent by random measurement errors and sample inhomogeneity. No significant difference in attenuation was found between benign and malignant solid lesions, or between different types of malignant lesions. The separation between cyst-fluid and tumour attenuation was, however, significant, which suggests it may be possible to distinguish cystic from solid breast lesions, and the results lay the groundwork for a clinical trial. [cropped]
High and low states of the system AM Herculis
Creators: name: Wu, K.
name: Kiss, L. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: We investigate the distribution of optically high and low states of the system AM Herculis (AM Her). Aims: We determine the state duty cycles, and their relationships with the mass transfer process and binary orbital evolution of the system. Methods: We make use of the photographic plate archive of the Harvard College Observatory between 1890 and 1953 and visual observations collected by the American Association of Variable Star Observers between 1978 and 2005. We determine the statistical probability of the two states, their distribution and recurrence behaviors. Results: We find that the fractional high state duty cycle of the system AM Her is 63%. The data show no preference of timescales on which high or low states occur. However, there appears to be a pattern of long and short duty cycle alternation, suggesting that the state transitions retain memories. We assess models for the high/low states for polars (AM Her type systems). We propose that the white-dwarf magnetic field plays a key role in regulating the mass transfer rate and hence the high/low brightness states, due to variations in the magnetic-field configuration in the system.
description: 8 pages, 5 figures, accepted for publication in A&A
Energetics of the Einstein-Rosen spacetime
Creators: name: Herrera, L.
name: Di Prisco, A.
name: Carot, J.
name: Santos, N. O.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A study covering some aspects of the Einstein--Rosen metric is presented. The electric and magnetic parts of the Weyl tensor are calculated. It is shown that there are no purely magnetic E--R spacetimes, and also that a purely electric E--R spacetime is necessarily static. The geodesics equations are found and circular ones are analyzed in detail. The super--Poynting and the ``Lagrangian'' Poynting vectors are calculated and their expressions are found for two specific examples. It is shown that for a pulse--type solution, both expressions describe an inward radially directed flow of energy, far behind the wave front. The physical significance of such an effect is discussed.
description: 19 pages Latex.References added and updated.To appear in Int.J.Theor.Phys
High power spatial single-mode quantum cascade lasers at 8.9 $μ$m
Creators: name: Forget, Sebastien
name: Faugeras, Clement
name: Bengloan, Jean Yves
name: Calligaro, Michel
name: Parillaud, Olivier
name: Giovannini, Marcella
name: Faist, Jerome
name: Sirtori, Carlo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High performance of InP-based quantum cascade lasers emitting at $λ$ ~ 9$μ$m are reported. Thick electroplated gold layer was deposited on top of the laser to improve heat dissipation. With one facet high reflection coated, the devices produce a maximum output power of 175mW at 40% duty cycle at room temperature and continuous-wave operation up to 278K.
Additional file 1 of Association between hemoglobin within the normal range and hemoglobin A1c among Chinese non-diabetes adults
Creators: name: Lai, Yi
name: Zhihong Lin
name: Zhu, Zhongxin
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Science Policy

description: Additional file 1: Table S1. Univariate analysis of the associations of each covariate with HbA1c.
Representation of fermions in the Pati-Salam model
Creators: name: Li, De-Sheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, a representation of fermions in the Pati-Salam model is suggested. The semi-leptonic and beyond standard model flavor changing neutral currents of the Lagrangian in this representation of fermions are discussed. A pair of possible Cabibbo-Kobayashi-Maskawa and Pontecorvo-Maki-Nakagawa-Sakata matrices are defined. An effective Lagrangian for this model is given.
description: 10 pages, 9 figures
Intramolecular Form Factor in Dense Polymer Systems: Systematic Deviations from the Debye formula
Creators: name: Beckrich, P.
name: Johner, A.
name: Semenov, A. N.
name: Obukhov, S. P.
name: Benoit, H.
name: Wittmer, J. P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We discuss theoretically and numerically the intramolecular form factor $F(q)$ in dense polymer systems. Following Flory's ideality hypothesis, chains in the melt adopt Gaussian configurations and their form factor is supposed to be given by Debye's formula. At striking variance to this, we obtain noticeable (up to 20%) non-monotonic deviations which can be traced back to the incompressibility of dense polymer solutions beyond a local scale. The Kratky plot ($q^2F(q)$ {\it vs.} wavevector $q$) does not exhibit the plateau expected for Gaussian chains in the intermediate $q$-range. One rather finds a significant decrease according to the correction $δ(F^{-1}(q)) = q^3/32ρ$ that only depends on the concentration $ρ$ of the solution, but neither on the persistence length or the interaction strength.
description: 29 pages, 11 figures, submitted to Macromolecules
Additional file 1 of Compound heterozygous variants in LAMC3 in association with posterior periventricular nodular heterotopia
Creators: name: Angelis, Carla De
name: Byrne, Alicia B.
name: Morrow, Rebecca
name: Jinghua Feng
name: Ha, Thuong
name: Wang, Paul
name: Schreiber, Andreas W.
name: Babic, Milena
name: Taranath, Ajay
name: Manton, Nick
name: King-Smith, Sarah L.
name: Quenten Schwarz
name: Arts, Peer
name: Scott, Hamish S.
name: Barnett, Christopher
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Neuroscience
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Developmental Biology
subject: Cancer
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology

description: Additional file 1: Figure S1. Post mortem neurological findings. a NeuN positive nuclear labelling of primitive neurons within the heterotopic nodules. (Scale = 100 µm) b Thickening of the richly vascular germinal matrix with an adjacent heterotopic nodule. (Scale = 500 µm) c Cortical mantle showing normal layering and normal overlying meninges. (Scale = 500 µm).
The origin of GEMS in IDPs as deduced from microstructural evolution of amorphous silicates with annealing
Creators: name: Davoisne, C.
name: Djouadi, Z.
name: Leroux, H.
name: d'Hendecourt, L.
name: Jones, A.
name: Deboffle, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present laboratory studies of the micro-structural evolution of an amorphous ferro-magnesian silicate, of olivine composition, following thermal annealing under vacuum. Annealing under vacuum was performed at temperatures ranging from 870 to 1020 K. After annealing spheroidal metallic nano-particles (2-50 nm) are found within the silicate films. We interpret this microstructure in terms of a reduction of the initial amorphous silicate FeO component, because of the carbon-rich partial pressure in the furnace due to pumping mechanism. Annealing in a controlled oxygen-rich atmosphere confirms this interpretation. The observed microstructures closely resemble those of the GEMS (Glass with Embedded Metal and Sulphides) found in chondritic IDPs (Interplanetary Dust Particles). Since IDPs contain abundant carbonaceous matter, a solid-state reduction reaction may have occurred during heating in the hot inner regions of the proto-solar disc. Related to this, the presence of forsterite grains grown from the amorphous precursor material clearly demonstrates that condensation from gaseous species is not required to explain the occurrence of forsterite around young protostars and in comets. Forsterite grains in these environments can be formed directly in the solid phase by thermal annealing of amorphous ferro-magnesian silicates under reducing conditions.
description: 4 pages, 2 figures. Accepted for publication A&A Letter to the Editor
Η επιρροή του ύψους των μεσοβάθρων στον Αντισεισμικό Σχεδιασμό των προκατασκευασμένων γεφυρών και απόπειρα εμπλοκής των πεζοδρομίων ως διαμήκων stoppers.:
Creators: name: Ντογκούλη, Ελένη Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Γέφυρα
Μεσόβαθρα
Πεζοδρόμια
Bridge
Piers
Pavements

description: Το βασικό αντικείμενο μελέτης της παρούσας διπλωματικής εργασίας αποτελεί η επιρροή του ύψους των μεσοβάθρων στον αντισεισμικό σχεδιασμό μιας προκατασκευασμένης γέφυρας, η οποία διαθέτει έναν διαφορετικό τρόπο σύνδεσης των δυο διαδοχικών μεσοβάθρων Μ2 και Μ3 με το κατάστρωμα της και εξετάζονται διάφορες περιπτώσεις μεσοβάθρων με χρήση ελαστομεταλλικών εφεδράνων και εφεδράνων ολίσθησης στο μεσόβαθρο Μ1 και στα ακρόβαθρα Α1 και Α2 αντίστοιχα. Η σύνδεση αυτή των μεσοβάθρων εμποδίζει την μετακίνηση κατά την διαμήκη και εγκάρσια έννοια μέσω τοποθέτησης κατάλληλων stoppers, και ταυτόχρονα επιτρέπει την ελεύθερη στροφή των σημείων στήριξης του φορέα περί των οριζόντιων αξόνων. Το προτεινόμενο αυτό σύστημα σύνδεσης προσφέρει σημαντική μείωση στις καταπονήσεις των μεσοβάθρων και γενικότερα ολόκληρου του φορέα. Ένα δεύτερο αντικείμενο μελέτης της εργασίας αποτελεί η αξιοποίηση των πεζοδρομίων της προκατασκευασμένης γέφυρας ως σεισμικών ανασχετήρων - stoppers κατά τη διαμήκη έννοια. Η καινοτομία αυτή αποσκοπεί στη μείωση των μετακινήσεων των ακροβάθρων και στις κεφαλές των μεσοβάθρων, και κατ’ επέκταση στη μείωση των αναπτυσσόμενων ροπών στις βάσεις των τελευταίων.
description: The basic object of the present diplomatic study constitutes the influence of piers height in the antiseismic design of prefabricated bridge, which offeres a different way of connection to the two successive piers M2 and M3 with the deck and is examined various cases of piers with use of elastomeric bearings and sliding bearings in the pier M1 and in abutments A1 and A2 respectively. This connection of piers binds the displacement at the longitudinal and traverse direction through the use oft suitable stoppers, and simultaneously allows the free rotation of support points of institution around the horizontal axes. This proposed system of connection offers important reduction in exhaustion of piers and generally to the entire institution.A second object of this study constitutes the exploitation of pavements of prefabricated bridge as seismic stoppers at the longitudinal direction. This innovation aims in the reduction of displacements of the abutments and in the heads of piers, and at extension in the reduction of developing moments in the bases of the last ones.
Nephropathogenic infectious bronchitis virus induced inflammation and damaged intestinal barrier in Hy-Line brown chickens
Creators: name: Feng, Chenlu
name: Zhang, Bingqing
name: Huang, Cheng
name: Gao, Xiaona
name: Shi, Yan
name: Shen, Yufan
name: Tang, Ruoyun
name: Lu, Zhihua
name: Qi, Qiurong
name: Li, Guyue
name: Liu, Ping
name: Cai, Gaofeng
name: Guo, Xiaoquan
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 300911
subject: Veterinary pharmacology
classificationCode: 300906
subject: Veterinary immunology
classificationCode: 300907
subject: Veterinary medicine (excl. urology)
classificationCode: 300902
subject: Veterinary anatomy and physiology
classificationCode: 300914
subject: Veterinary virology

description: 肾病原性传染性支气管炎病毒 （NIBV） 是家禽育种业中的一种常见病毒。NIBV 感染可对鸡的肾脏、呼吸道和肠道造成损害，导致家禽出现咳嗽、稀便和肾脏斑点等临床症状。肠道是人体最大的免疫器官，目前关于 NIBV 引起的肠道损伤的研究报道很少。本研究旨在研究 NIBV 感染对十二指肠肠道屏障功能的影响。将 Hy-Line 棕色鸡随机分为对照组和疾病组。在 28 日龄时，疾病组雏鸡接种 NIBV SX9 10-5/0.2 mL。我们的结果表明，NIBV 感染导致十二指肠出血点，导致十二指肠 SIgA 含量增加。组织病理学观察和分析发现，绒毛高度降低，隐窝深度增加，VH/CD 显著降低。 同时，杯状细胞的数量减少了。 NIBV 感染下调物理屏障相关细胞因子 （ZO-1 、 occludin 和 claudin-1） 和化学屏障相关细胞因子 （MUC2 和 TFF3） 的表达，上调免疫屏障相关细胞因子 （IL-2 、 IL-4 、 IL-17 、 TGF-β 、 TNF-α 和 CCR7 的表达。 总之，NIBV 在十二指肠中复制，在十二指肠中引起炎症反应，破坏其物理、化学和免疫屏障，并影响正常的十二指肠功能。
Data Lakes for Digital Humanities
Creators: name: Darmont, Jérôme
name: Favre, Cécile
name: Loudcher, Sabine
name: Noûs, Camille
Publisher: name: arXiv
Year: 2020
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Traditional data in Digital Humanities projects bear various formats (structured, semi-structured, textual) and need substantial transformations (encoding and tagging, stemming, lemmatization, etc.) to be managed and analyzed. To fully master this process, we propose the use of data lakes as a solution to data siloing and big data variety problems. We describe data lake projects we currently run in close collaboration with researchers in humanities and social sciences and discuss the lessons learned running these projects.
description: Data and Digital Humanities Track
Machine learning dismantling and early-warning signals of disintegration in complex systems
Creators: name: Grassia, Marco
name: De Domenico, Manlio
name: Mangioni, Giuseppe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: From physics to engineering, biology and social science, natural and artificial systems are characterized by interconnected topologies whose features - e.g., heterogeneous connectivity, mesoscale organization, hierarchy - affect their robustness to external perturbations, such as targeted attacks to their units. Identifying the minimal set of units to attack to disintegrate a complex network, i.e. network dismantling, is a computationally challenging (NP-hard) problem which is usually attacked with heuristics. Here, we show that a machine trained to dismantle relatively small systems is able to identify higher-order topological patterns, allowing to disintegrate large-scale social, infrastructural and technological networks more efficiently than human-based heuristics. Remarkably, the machine assesses the probability that next attacks will disintegrate the system, providing a quantitative method to quantify systemic risk and detect early-warning signals of system's collapse. This demonstrates that machine-assisted analysis can be effectively used for policy and decision making to better quantify the fragility of complex systems and their response to shocks.
description: 18 pages, 5 figures. Supplementary materials: 35 pages, 10 figures, 4 tables