cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Additional file 2 of Ddx56 maintains proliferation of mouse embryonic stem cells via ribosome assembly and interaction with the Oct4/Sox2 complex
Creators: name: Wang, Jingwen
name: Liu, Jiahui
name: Ye, Miaoman
name: Liu, Feng
name: Wu, Su
name: Huang, Junjiu
name: Shi, Guang
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 2 : Figure S1.Ddx56 gRNA designing and detection by T7E1. (A) Schematic representation of gRNA target sites in Ddx56 protein domain. (B) T7E1 assay to examine the cleavage efficiency of gRNA in E14 cells. The star indicates the predicted digested band. Figure S2. Ddx56 knockdown affects mESCs survival. (A) E14 cells were transfected with control oligos (NC) or three different oligos targeting Ddx56 (si-1, si-2. si-3). After 48 h, cells were collected, and knockdown efficiency was detected by RT–qPCR. Blank, untreated E14 cells. (B) E14 cells were transfected with control oligos (NC) or three different oligos targeting Ddx56 (si-1, si-2. si-3). After 48 h, cells were visualized by phase-contrast microscopy. 4×, objective. (left) and analyzed by quantitative real-time polymerase chain reaction (qRT-PCR) to assess knockdown efficiency (right). Blank, untreated E14 cells. si-1A and si-1B mean two parall holes. (C) Cells from (A) were analyzed by qRT-PCR for the expression of pluripotency markers and the indicated lineages marker. Error bars indicated SD (n=3), *, p<0.05, ***, p<0.001. Abbreviation: Pre, primitive endoderm. Figure S3. Ddx56 wildtype and truncations expression do not affect cell size. (A) Western blotting was performed to detect exogenous expression of flag tagged Ddx56 full length or Ddx56 domain truncations in mESCs after the induction of Dox for 2 days. Tubulin or GAPDH served as a loading control. Abbreviation: iOE, inducible overexpression. (B) Cells were cultured with (+Dox) or without doxycycline (-Dox) for 4 days, then seeded into a new plate in single cells. 50 cells were calculated in each group. Figure S4. Wildtype Ddx56 or Ddx56 ΔC-ter expressing mESCs do not affect the level of pluripotency factors and pluripotency related cell cycle genes. RT-PCR analysis was carried out to detect the pluripotency genes (Oct4, Nanog, Sox2, Klf4) and regulating stem cell cycle genes (Foxd3, Pura, Wnt3a, Myc) in wildtype Ddx56 or Ddx56 ΔC-ter expressing mESCs. Figure S5. Ddx56 is localized in nucleolus with Oct4 in the overexpressed cells. EGFP or Ddx56 induced expression mESCs were cultured with or without Dox for 2 days, and subjected to immunostaining with antibodies against Oct4 (green) and Flag (red).
Active liquid crystals powered by force-sensing DNA-motor clusters
Creators: name: Tayar, Alexandra M.
name: Hagan, Michael F.
name: Dogic, Zvonimir
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Cytoskeletal active nematics exhibit striking non-equilibrium dynamics that are powered by energy-consuming molecular motors. To gain insight into the structure and mechanics of these materials, we design programmable clusters in which kinesin motors are linked by a double-stranded DNA linker. The efficiency by which DNA-based clusters power active nematics depends on both the stepping dynamics of the kinesin motors and the chemical structure of the polymeric linker. Fluorescence anisotropy measurements reveal that the motor clusters, like filamentous microtubules, exhibit local nematic order. The properties of the DNA linker enable the design of force-sensing clusters. When the load across the linker exceeds a critical threshold the clusters fall apart, ceasing to generate active stresses and slowing the system dynamics. Fluorescence readout reveals the fraction of bound clusters that generate interfilament sliding. In turn, this yields the average load experienced by the kinesin motors as they step along the microtubules. DNA-motor clusters provide a foundation for understanding the molecular mechanism by which nanoscale molecular motors collectively generate mesoscopic active stresses, which in turn power macroscale non-equilibrium dynamics of active nematics.
description: main text: text 19 pages, 6 figures. Supplementary information: text 9 pages, 12 figures
Quantum nematic as ground state of a two-dimensional electron gas in a magnetic field
Creators: name: Doan, Quoc M.
name: Manousakis, Efstratios
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the ground state of a nematic phase of the two-dimensional electron gas at filling fraction $ν= 1/2$ using a variational wavefunction having Jastrow pair-correlations of the form $Π_{i < j}(z_i-z_j)^2$ and an elliptical Fermi sea. Using the Fermi hypernetted chain approximation we find that below a critical value of the broken symmetry parameter, the nematic phase is energetically favorable as compared to the isotropic state for the second excited Landau level. We also find that below a critical value of the layer ``thickness'' parameter $λ$ (and in the actual materials) the quantum nematic is energetically favorable relative to the stripe ordered Wigner crystal phase.
description: 4 two-column pages, 4 figures
Capacity Planning for Effective Cohorting of Dialysis Patients during the Coronavirus Pandemic: A Case Study
Creators: name: Bozkir, Cem
name: Ozmemis, Cagri
name: Kurbanzade, Ali Kaan
name: Balcik, Burcu
name: Gunes, Evrim
name: Tuglular, Serhan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Chronic dialysis patients have been among the most vulnerable groups of the society during the coronavirus (COVID-19) pandemic as they need regular treatments in a hospital environment, facing infection risk. Moreover, the demand for dialysis resources has significantly increased since many COVID-19 patients need acute dialysis due to kidney failure. In this study, we address capacity planning decisions of a hemodialysis clinic located within a major hospital in Istanbul, designated to serve both infected and uninfected patients during the pandemic with limited resources (i.e., dialysis machines). The hemodialysis clinic applies a three-unit cohorting strategy to treat four types of patients in separate units and at different times to mitigate infection spread risk among patients. Accordingly, at the beginning of each week, the clinic needs to determine the number of available dialysis machines to allocate to each unit that serves different patient cohorts. Given the uncertainties in the number of different types of patients that will need dialysis, it is a challenge to allocate the scarce dialysis resources effectively by evaluating which capacity configuration would minimize the overlapping treatment sessions of infected and uninfected patients over a week. We represent the uncertainties in the number of patients by a set of scenarios and present a two-stage stochastic programming approach to support capacity allocation decisions of the clinic. We present a case study based on the real-world patient data obtained from the clinic to illustrate the effectiveness of the proposed modeling approach and compare the performance of different cohorting strategies.
Το Θεώρημα της Αναγωγής για τις Συμπλεκτικές και τις Poisson πολλαπλότητες και εφαρμογές του.
Creators: name: Σταμπολίδης, Παύλος Συμεών
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Συμπλεκτικές Πολλαπλότητες
Poisson Πολλαπλότητες
Θεώρημα της Αναγωγής
Symplectic Manifolds
Poisson Manifolds
Reduction Theorem

description: Στην παρούσα Διπλωματική εργασία μελετάμε το πρόβλημα της αναγωγής στην κατηγορία των συμπλεκτικών και Poisson πολλαπλοτήτων. Έπειτα από μία παρουσίαση της στοιχειώδους θεωρίας των συμπλεκτικών και Poisson πολλαπλοτήτων αποδεικνύουμε το Θεώρημα της Αναγωγής και στις δύο περιπτώσεις και παρουσιάζουμε μερικά χαρακτηριστικά παραδείγματα.
description: In the present Master's thesis we study the reduction problem in the category of symplectic and Poisson manifolds. After a presentation of elementary theory of symplectic and Poisson manifolds we prove the Reduction Theorem in both case and we present some characteristic examples.
Measurement of the Mass and Width of the W Boson in e+e- Collisions at sqrt{s} = 161 - 209 GeV
Creators: name: The DELPHI Collaboration
name: Abdallah, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A measurement of the W boson mass and width has been performed by the DELPHI collaboration using the data collected during the full LEP2 programme (1996-2000). The data sample has an integrated luminosity of 660 pb^-1 and was collected over a range of centre-of-mass energies from 161 to 209 GeV. Results are obtained by applying the method of direct reconstruction of the mass of the W from its decay products in both the W+W- -> lvqq and W+W- -> qqqq channels. The W mass result for the combined data set is M_W = 80.336 +/- 0.055 (Stat.) +/- 0.028 (Syst.) +/- 0.025 (FSI) +/- 0.009 (LEP) GeV/c^2, where FSI represents the uncertainty due to final state interaction effects in the qqqq channel, and LEP represents that arising from the knowledge of the collision energy of the accelerator. The combined value for the W width is Gamma_W = 2.404 +/- 0.140 (Stat.) +/- 0.077 (Syst.) +/- 0.065 (FSI) GeV/c^2. These results supersede all values previously published by the DELPHI collaboration. This paper is dedicated to the memory of Carlo Caso.
description: 63 pages, 14 figures, Accepted by Eur. Phys. J. C
The Impact of a Stealth CME on the Martian Topside Ionosphere
Creators: name: Thampi, Smitha V.
name: Krishnaprasad, C.
name: Nampoothiri, Govind G.
name: Pant, Tarun K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Solar cycle 24 is one of the weakest solar cycles recorded, but surprisingly the declining phase of it had a slow CME which evolved without any low coronal signature and is classified as a stealth CME which was responsible for an intense geomagnetic storm at Earth (Dst = -176 nT). The impact of this space weather event on the terrestrial ionosphere has been reported. However,the propagation of this CME beyond 1 au and the impact of this CME on other planetary environments have not been studied so far. In this paper, we analyse the data from Sun-Earth L1 point as well as from the Martian orbit (near 1.5 au) to understand the characteristics of the stealth CME as observed beyond 1 au. The observations near Earth are using data from the Solar Dynamics Observatory (SDO) and the Advanced Composition Explorer (ACE) satellite located at L1 point whereas those near Mars are from the instruments for plasma and magnetic field measurements on board Mars Atmosphere and Volatile EvolutioN (MAVEN) mission. The observations show that the stealth CME has reached 1.5 au after 7 days of its initial observations at the Sun and caused depletion in the nightside topside ionosphere of Mars, as observed during the inbound phase measurements of the Langmuir Probe and Waves (LPW) instrument on board MAVEN. These observations have implications on the ion escape rates from the Martian upper atmosphere.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society (2021)
INTEGRAL observations of TeV plerions
Creators: name: Hoffmann, A. I. D.
name: Horns, D.
name: Santangelo, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Amongst the sources seen in very high gamma-rays several are associated with Pulsar Wind Nebulae (``TeV plerions''). The study of hard X-ray/soft gamma-ray emission is providing an important insight into the energetic particle population present in these objects. The unpulsed emission from pulsar/pulsar wind nebula systems in the energy range accessible to the INTEGRAL satellite is mainly synchrotron emission from energetic and fast cooling electrons close to their acceleration site. Our analyses of public INTEGRAL data of known TeV plerions detected by ground based Cherenkov telescopes indicate a deeper link between these TeV plerions and INTEGRAL detected pulsar wind nebulae. The newly discovered TeV plerion in the northern wing of the Kookaburra region (G313.3+0.6 powered by the middle aged PSR J1420-6048) is found to have a previously unknown INTEGRAL counterpart which is besides the Vela pulsar the only middle aged pulsar detected with INTEGRAL. We do not find an INTEGRAL counterpart of the TeV plerion associated with the X-ray PWN ``Rabbit'' G313.3+0.1 which is possibly powered by a young pulsar.
description: 4 pages, 6 figures, proceedings of conference "The Multi-Messenger Approach to High-Energy Gamma-ray Sources" Barcelona/Spain (2006)
The Global Kinematics of the Globular Cluster M92
Creators: name: Drukier, G. A.
name: Cohn, H. N.
name: Lugger, P. M.
name: Slavin, S. D.
name: Berrington, R. C.
name: Murphy, B. W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the determination of high-accuracy radial velocities for 299 members of the globular cluster M92 using the Hydra multi-object spectrograph on the WIYN telescope. We have concentrated on stars outside of the central region of the cluster, located up to 14'4 from the cluster center. Candidate members were selected for spectroscopy based on a photometric metallicity index determined from 3-band Washington photometry, also obtained with the WIYN telescope. The median error in the velocities is 0.35 km/s. We find the heliocentric radial velocity of the cluster to be -121.2 +/-0.3 km/s. We have used an improved Bayesian analysis to determine the velocity dispersion profile of M92. The most probable profile is a cored power-law with a scale radius of 2', velocity dispersion at 1' of 6.3km/s and outer power-law with slope -0.6. We have also reanalyzed the M15 radial velocities of Drukier et al. (1998) and find that a pure power-law with a 1' velocity dispersion of 8 km/s and slope -0.5, and the combination of a power-law with slope -0.4 and scale of 7.5 km/s inside 9' and a dispersion of 4 km/s outside, are equally likely. In both clusters there is evidence that the samples include escaping stars. We present results from a GRAPE-based N-body simulation of an isolated cluster that demonstrates this effect. We suggest additional tests to determine the relative importance of tidal heating and stellar ejection for establishing the velocity field in globular cluster halos.
description: 55 pages, 15 figures. To appear in AJ
Health anxiety and perceived vulnerability to illness
Creators: name: Thordarson, Dana S.
Publisher: name: University of British Columbia
Year: 2008

description: The purpose of this study was to test several hypotheses suggested by Warwick & Salkovskis's (1990) recently developed cognitive-behavioural theory of hypochondriasis and health anxiety. The main hypothesis of the study was that perceived vulnerability to illness, fear of bodily sensations and changes, and dysfunctional attitudes toward illness are the major components of health anxiety. University students (N=161) completed a questionnaire package with measures of health anxiety (including the Whitely Index), perceived vulnerability to illness, fear of bodily sensations, dysfunctional attitudes, depression (BDI), and trait anxiety (STAI-T). The results suggested that the most important of the hypothesized components was dysfunctional attitudes toward illness, followed by perceived vulnerability toward illness. However, these predictors did not account for a large proportion of the variance in health anxiety scores, and their contribution was further reduced by including depression as a covariate. The results are discussed regarding problems with measurement, sampling, and theory. Further research, especially studies devoted to the role of experience of illness in health anxiety, is suggested.
Additional file 5 of Transforming acidic coiled-coil protein-3: a novel marker for differential diagnosis and prognosis prediction in endocervical adenocarcinoma
Creators: name: Wen, Yan-Lin
name: Yan, Shu-Mei
name: Wei, Wei
name: Yang, Xia
name: Zhang, Shi-Wen
name: Yun, Jing-Ping
name: Liu, Li-Li
name: Luo, Rong-Zhen
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Cancer

description: Additional file 5: Table S1. Characteristics of patients with the human papillomavirus. Table S2. Diagnostic performances of studied testing for ECA patients.
Image Classification with CondenseNeXt for ARM-Based Computing Platforms
Creators: name: Kalgaonkar, Priyank
name: El-Sharkawy, Mohamed
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we demonstrate the implementation of our ultra-efficient deep convolutional neural network architecture: CondenseNeXt on NXP BlueBox, an autonomous driving development platform developed for self-driving vehicles. We show that CondenseNeXt is remarkably efficient in terms of FLOPs, designed for ARM-based embedded computing platforms with limited computational resources and can perform image classification without the need of a CUDA enabled GPU. CondenseNeXt utilizes the state-of-the-art depthwise separable convolution and model compression techniques to achieve a remarkable computational efficiency. Extensive analyses are conducted on CIFAR-10, CIFAR-100 and ImageNet datasets to verify the performance of CondenseNeXt Convolutional Neural Network (CNN) architecture. It achieves state-of-the-art image classification performance on three benchmark datasets including CIFAR-10 (4.79% top-1 error), CIFAR-100 (21.98% top-1 error) and ImageNet (7.91% single model, single crop top-5 error). CondenseNeXt achieves final trained model size improvement of 2.9+ MB and up to 59.98% reduction in forward FLOPs compared to CondenseNet and can perform image classification on ARM-Based computing platforms without needing a CUDA enabled GPU support, with outstanding efficiency.
description: 6 pages, 7 figures, conference, published IEEE Conference paper
Stabilization of vector soliton complexes in nonlocal nonlinear media
Creators: name: Xu, Zhiyong
name: Kartashov, Yaroslav V.
name: Torner, Lluis
Publisher: name: arXiv
Year: 2006
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We introduce vector soliton complexes in nonlocal Kerr-type nonlinear media. We discover that under proper conditions the combination of nonlocality and vectorial coupling has a remarkable stabilizing action on multi-humped solitons. In particular, we find that stable bound states featuring several field oscillations in each soliton component do exist. This affords stabilization of vector soliton trains incorporating large number of humps, a class of structures known to self-destroy via strong instabilities in scalar settings.
description: 17 pages, 4 figures, to appear in Physical Review E (Rapid Communications)
Cometary water expansion velocity from OH line shapes
Creators: name: Tseng, W. -L.
name: Bockelée-Morvan, D.
name: Crovisier, J.
name: Colom, P.
name: Ip, W. -H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We retrieve the H_2O expansion velocity in a number of comets, using the 18-cm line shapes of the OH radical observed with the Nançay radio telescope. The H_2O velocity is derived from the large base of a trapezium fitted to the observed spectra. This method, which was previously applied to 9 comets, is now extended to 30 further comets. This allows us to study the evolution of their water molecule outflow velocity over a large range of heliocentric distances and gas production rates. Our analysis confirms and extends previous analyses. The retrieved expansion velocities increases with increasing gas production rates and decreasing heliocentric distances. Heuristic laws are proposed, which could be used for the interpretation of observations of cometary molecules and as a touchstone for hydrodynamical models. The expansion velocities retrieved from 18 cm line shapes are larger than those obtained from millimetric observations of parent molecules with smaller fields of view, which demonstrates the acceleration of the gas with cometocentric distance. Our results are in reasonable quantitative agreement with current hydrodynamical models of cometary atmospheres.
description: Accepted for publication in Astronomy & Astrophysics
PhyCRNet: Physics-informed Convolutional-Recurrent Network for Solving Spatiotemporal PDEs
Creators: name: Ren, Pu
name: Rao, Chengping
name: Liu, Yang
name: Wang, Jianxun
name: Sun, Hao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Computation and Language (cs.CL)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Partial differential equations (PDEs) play a fundamental role in modeling and simulating problems across a wide range of disciplines. Recent advances in deep learning have shown the great potential of physics-informed neural networks (PINNs) to solve PDEs as a basis for data-driven modeling and inverse analysis. However, the majority of existing PINN methods, based on fully-connected NNs, pose intrinsic limitations to low-dimensional spatiotemporal parameterizations. Moreover, since the initial/boundary conditions (I/BCs) are softly imposed via penalty, the solution quality heavily relies on hyperparameter tuning. To this end, we propose the novel physics-informed convolutional-recurrent learning architectures (PhyCRNet and PhyCRNet-s) for solving PDEs without any labeled data. Specifically, an encoder-decoder convolutional long short-term memory network is proposed for low-dimensional spatial feature extraction and temporal evolution learning. The loss function is defined as the aggregated discretized PDE residuals, while the I/BCs are hard-encoded in the network to ensure forcible satisfaction (e.g., periodic boundary padding). The networks are further enhanced by autoregressive and residual connections that explicitly simulate time marching. The performance of our proposed methods has been assessed by solving three nonlinear PDEs (e.g., 2D Burgers' equations, the $λ$-$ω$ and FitzHugh Nagumo reaction-diffusion equations), and compared against the start-of-the-art baseline algorithms. The numerical results demonstrate the superiority of our proposed methodology in the context of solution accuracy, extrapolability and generalizability.
description: 22 pages
Uniqueness of the (22,891,1/4) spherical code
Creators: name: Cohn, Henry
name: Kumar, Abhinav
Publisher: name: arXiv
Year: 2006
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: We use techniques of Bannai and Sloane to give a new proof that there is a unique (22,891,1/4) spherical code; this result is implicit in a recent paper by Cuypers. We also correct a minor error in the uniqueness proof given by Bannai and Sloane for the (23,4600,1/3) spherical code.
description: 11 pages
Επεξεργασία θ-συνδέσεων σε GPU
Creators: name: Μπέλλας, Χρήστος Μιχαήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Σχεσιακή βάση δεδομένων
θ-σύνδεση
Παράλληλη επεξεργασία
Relational database
theta-join
Parallel processing

description: Η χρήση του GPGPU προγραμματιστικού μοντέλου έχει προταθεί για την επιτάχυνση αρκετών τελεστών σχεσιακών βάσεων δεδομένων, αξιοποιώντας το πάραλληλο περιβάλλον της GPU. Οι περισσότερες έρευνες επικεντρώνονται στην υλοποίηση τελεστών επιλογής, καθώς και στη σύνδεση σχέσεων με τελεστή ισότητας. Στην παρούσα διπλωματική εργασία μελετάται η αποδοτική υλοποίηση ερωτημάτων θ-σύνδεσης ανάμεσα σε δύο σχέσεις στη GPU. Κυρίαρχα ζητήματα που παρουσιάζονται αφορούν τη διατήρηση του βαθμού παραλληλισμού, λόγω της διακλάδωσης που υπάρχει, αλλά και τη διαθέσιμη μνήμη για την αποθήκευση των πλειάδων εξόδου. Ως αποτέλεσμα της μελέτης προτείνουμε μία μεθοδολογία η οποία εκμεταλλεύεται το ετερογενές περιβάλλον ανάπτυξης των GPGPU προγραμμάτων, αντιμετωπίζοντας παράλληλα τους περιορισμούς μνήμης που παρουσιάζονται.
description: The application of the GPGPU paradigm has been proposed to accelerate certain relational database operations by utilizing the massive parallelism of the GPU. Most researches focus on the implementation of simple select and equality join operations. This master’s thesis studies the efficient implementation of theta join queries between two relations in the GPU. Two major issues are presented. The first relates to the maintenance of the degree of parallelism between the executed threads due to existing branching. The second is about the available memory needed to store output tuples. As a result of this research, we propose a methodology which exploits the heterogenous nature of GPGPU, while addressing memory limitations presented.
Electronic and magnetic properties of iridium ilmenites $A$IrO$_3$ ($A=$ Mg, Zn, and Mn)
Creators: name: Jang, Seong-Hoon
name: Motome, Yukitoshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically investigate the electronic band structures and magnetic properties of ilmenites with edge-sharing IrO$_6$ honeycomb layers, $A$IrO$_3$ with $A=$ Mg, Zn, and Mn, in comparison with a collinear antiferromagnet MnTiO$_3$. The compounds with $A=$ Mg and Zn were recently reported in Y.~Haraguchi {\it et al.}, Phys. Rev. Materials {\bf 2}, 054411 (2018), while MnIrO$_3$ has not been synthesized yet but the honeycomb stacking structure was elaborated in a superlattice with MnTiO$_3$ in K.~Miura {\it et al.}, Commun. Mater. {\bf 1}, 55 (2020). We find that, in contrast to MnTiO$_3$, where an energy gap opens in the Ti $3d$ bands by antiferromagnetic ordering of the high-spin $S=5/2$ moments, MgIrO$_3$ and ZnIrO$_3$ have a gap in the Ir $5d$ bands under the influence of both spin-orbit coupling and electron correlation. Their electronic structures are similar to those in the spin-orbit coupled Mott insulators with the $j_{\rm eff}=1/2$ pseudospin degree of freedom, as found in monoclinic $A_2$IrO$_3$ with $A=$ Na and Li which have been studied as candidates for the Kitaev spin liquid. Indeed, we find that the effective exchange interactions between the $j_{\rm eff}=1/2$ pseudospins are dominated by the Kitaev-type bond-dependent interaction and the symmetric off-diagonal interactions. On the other hand, for MnIrO$_3$, we show that the local lattice structure is largely deformed, and both Mn $3d$ and Ir $5d$ bands appear near the Fermi level in a complicated manner, which makes the electronic and magnetic properties qualitatively different from MgIrO$_3$ and ZnIrO$_3$. Our results indicate that the IrO$_6$ honeycomb network in the ilmenites $A$IrO$_3$ with $A=$ Mg and Zn would offer a good platform for exotic magnetism by the spin-orbital entangled moments like the Kitaev spin liquid.
The nonlocal dielectric response of water in nanoconfinement
Creators: name: Monet, Geoffrey
name: Bresme, Fernando
name: Kornyshev, Alexei
name: Berthoumieux, Hélène
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Recent experiments reporting a very low dielectric permittivity for nanoconfined water have renewed the interest to the structure and dielectric properties of water in narrow gaps. Here, we describe such systems with a minimal Landau-Ginzburg field-theory composed of a nonlocal bulk-determined term and a local water-surface interaction term. We show how the interplay between the boundary conditions and intrinsic bulk correlations encodes dielectric properties of confined water. Our theoretical analysis is supported by molecular dynamics simulations and comparison with the experimental data.
description: 5 pages, 4 figures and a 14-page supplemental material
Η εμπειρία της θεραπευτικής ιππασίας σε παιδιά με διαταραχές αυτιστικού φάσματος
Creators: name: Παπαδόπουλος, Χρήστος Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Θεραπευτική ιππασία
Αυτισμός
Διαταραχές επικοινωνίας και κοινωνικής αλληλεπίδρασης
Therapeutic horseback riding
Autism
Communication and social interaction disorders

description: Σκοπός της ερευνητικής εργασίας ήταν να καταγραφεί των η επίδραση του προγράμματος θεραπευτικής ιππασίας στους τομείς της κοινωνικής αλληλεπίδρασης, της επικοινωνίας και του παιχνιδιού, τριών παιδιών με διαταραχές αυτιστικού φάσματος ηλικίας 3-5 ετών . Η εξαγωγή των συμπερασμάτων έγινε μέσα από τη συμμετοχική παρατήρηση του ερευνητή των 40 ημίωρων συναντήσεων που πραγματοποιήθηκαν και την ανάλυση των συνεντεύξεων που δόθηκαν από τους γονείς των παιδιών που συμμετείχαν στην έρευνα. Η παρακολούθηση του προγράμματος επέφερε βελτίωση στους παραπάνω τομείς και τα παιδιά απέκτησαν δεξιότητες και συμπεριφορές βελτιώνοντας ουσιαστικά την κοινωνική αλληλεπίδραση και επικοινωνία τους, αλλά και το παιχνίδι. Η βελτίωση που παρουσιάστηκε εξετάστηκε ξεχωριστά για το κάθε παιδί και αξιολογήθηκε σε σχέση με την προηγούμενη κατάσταση που υπήρχε στο ίδιο το παιδί.
description: The purpose of the research study was to record the effect of the therapeutic horseback riding program in the fields social interaction, communication and playing, on three children with autism spectrum disorders aged 3-5 years. The conclusions were made through participant observation of the researcher of 40 half-hour meetings and the analysis of the interviews given by the parents of the children surveyed. Participation in the program brought improvements in the above areas. The children gained skills and behaviors that substantially improved social interaction, communication and also playing. The level of improvement was examined separately for each child, and evaluated with respect to the previous state that the same child was in.
The Fibers and Range of Reduction Graphs in Ciliates
Creators: name: Brijder, Robert
name: Hoogeboom, Hendrik Jan
Publisher: name: arXiv
Year: 2007
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: The biological process of gene assembly has been modeled based on three types of string rewriting rules, called string pointer rules, defined on so-called legal strings. It has been shown that reduction graphs, graphs that are based on the notion of breakpoint graph in the theory of sorting by reversal, for legal strings provide valuable insights into the gene assembly process. We characterize which legal strings obtain the same reduction graph (up to isomorphism), and moreover we characterize which graphs are (isomorphic to) reduction graphs.
description: 24 pages, 13 figures
Additional file 2 of Divergent camptothecin biosynthetic pathway in Ophiorrhiza pumila
Creators: name: Yang, Mengquan
name: Wang, Qiang
name: Liu, Yining
name: Hao, Xiaolong
name: Wang, Can
name: Liang, Yuchen
name: Chen, Jianbo
name: Xiao, Youli
name: Kai, Guoyin
Publisher: name: figshare
Year: 2021
Subjects: subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 2:. The original, uncropped SDS-PAGE of Fig. S6.
Towards a fully consistent Milky Way disk model -- IV. The impact of Gaia DR2 and APOGEE
Creators: name: Sysoliatina, K.
name: Just, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present an updated version of the semi-analytic Just-Jahreiß (JJ) model of the Galactic disk and constrain its parameters in the Solar neighbourhood. The new features of the JJ model include a simple two-component gaseous disk, a star-formation rate (SFR) function of the thick disk that has been extended in time, and a correlation between the kinematics of molecular gas and thin-disk populations. Here, we study the vertical number density profiles and W-velocity distributions determined from ~2 million local stars of the Gaia DR2. We also investigate an apparent Hess diagram of the Gaia stars selected in a conic volume towards the Galactic poles. Using a stellar evolution library, we synthesise stellar populations with a four-slope broken power-law initial mass function (IMF), the SFR, and an age-metallicity relation (AMR). The latter is consistently derived with the observed metallicity distribution of the local Red Clump (RC) giants from the APOGEE. Working within a Bayesian approach, we sample the posterior probability distribution in a multidimensional parameter space using the MCMC method. We find that the spatial distribution and motion of the Gaia stars imply two recent SF bursts centered at ages of ~0.5 Gyr and ~3 Gyr and characterised by a ~30% and ~55% SF enhancement, respectively, relative to a monotonously declining SFR continuum. The stellar populations associated with this SF excess are found to be dynamically hot for their age: they have W-velocity dispersions of ~12.5 km/s and ~26 km/s. The new JJ model is able to reproduce the local star counts with an accuracy of ~5 %. Using Gaia DR2 data, we self-consistently constrained 22 parameters of the updated JJ model. Our optimised model predicts two SF bursts within the last ~4 Gyr, which may point to recent episodes of gas infall.
description: 29 pages, 16 figures, 4 tables. Accepted for publication in Astronomy&Astrophysics on December 1, 2020
Microscopic primordial black holes and extra dimensions
Creators: name: Conley, John A.
name: Wizansky, Tommer
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the production and evolution of microscopic black holes in the early universe in the large extra dimensions scenario. We demonstrate that, unlike in the standard four-dimensional cosmology, in large extra dimensions absorption of matter from the primordial plasma by the black holes is significant and can lead to rapid growth of the black hole mass density. This effect can be used to constrain the conditions present in the very early universe. We demonstrate that this constraint is applicable in regions of parameter space not excluded by existing bounds.
description: 19 pages, 6 figures
Hierarchical Learning Using Deep Optimum-Path Forest
Creators: name: Afonso, Luis C. S.
name: Pereira, Clayton R.
name: Weber, Silke A. T.
name: Hook, Christian
name: Falcão, Alexandre X.
name: Papa, João P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Bag-of-Visual Words (BoVW) and deep learning techniques have been widely used in several domains, which include computer-assisted medical diagnoses. In this work, we are interested in developing tools for the automatic identification of Parkinson's disease using machine learning and the concept of BoVW. The proposed approach concerns a hierarchical-based learning technique to design visual dictionaries through the Deep Optimum-Path Forest classifier. The proposed method was evaluated in six datasets derived from data collected from individuals when performing handwriting exams. Experimental results showed the potential of the technique, with robust achievements.
Mentorship Network Structure: How Relationships Emerge Online and What They Mean for Amateur Creators
Creators: name: Davis, Ruby
name: Frens, Jenna
name: Sharma, Niharika
name: Muralikumar, Meena Devii
name: Aragon, Cecilia
name: Evans, Sarah
Publisher: name: arXiv
Year: 2021
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Relationships form the core of connected learning. In this study, we apply and extend social network analysis methods to uncover the layered network structure of relationships among Fanfiction.net authors and reviewers. Fanfiction.net, one of the world's largest fanfiction communities, is a space where millions of young people engage with written media, connect over shared interests, and receive support and mentoring from a distributed audience. Does an affinity space such as Fanfiction.net have the same structure as social networks Facebook and Twitter? We applied k-means clustering on millions of relationships to determine that Fanfiction.net has 2 to 3 layers, in contrast with the 4-layer structure of Facebook and 5-layer structure of Twitter. In addition, we conducted a large-scale machine classification of Fanfiction.net reviews to reveal the types of mentoring exchanged in each layer. Our findings show that the relationships where reviews are exchanged most frequently are most likely to contain substantive reviews. We discuss implications of these findings for the theory of distributed mentoring as well as the design of online affinity networks.
description: 10 pages, 2 figures, published in The Proceedings of the 2020 Connected Learning Summit
Bayesian evaluation of charge yields of fission fragments of 239U
Creators: name: Qiao, C. Y.
name: Pei, J. C.
name: Wang, Z. A.
name: Qiang, Y.
name: Chen, Y. J.
name: Shu, N. C.
name: Ge, Z. G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Recent experiments [Phys. Rev. Lett. 123, 092503(2019); Phys. Rev. Lett. 118, 222501 (2017)] have made remarkable progress in measurements of the isotopic fission-fragment yields of the compound nucleus $^{239}$U, which is of great interests for fast-neutron reactors and for benchmarks of fission models. We apply the Bayesian neural network (BNN) approach to learn existing evaluated charge yields and infer the incomplete charge yields of $^{239}$U. We found the two-layer BNN is improved compared to the single-layer BNN for the overall performance. Our results support the normal charge yields of $^{239}$U around Sn and Mo isotopes. The role of odd-even effects in charge yields has also been studied.
description: 5 pages, 4 figures
Formation of Quantum Shock Waves by Merging and Splitting Bose-Einstein Condensates
Creators: name: Chang, J. J.
name: Engels, P.
name: Hoefer, M. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The processes of merging and splitting dilute-gas Bose-Einstein condensates are studied in the nonadiabatic, high-density regime. Rich dynamics are found. Depending on the experimental parameters, uniform soliton trains containing more than ten solitons or the formation of a high-density bulge as well as quantum (or dispersive) shock waves are observed experimentally within merged BECs. Our numerical simulations indicate the formation of many vortex rings. In the case of splitting a BEC, the transition from sound-wave formation to dispersive shock-wave formation is studied by use of increasingly stronger splitting barriers. These experiments realize prototypical dispersive shock situations.
description: 10 pages, 8 figures
Investigating english teacher motivation in the greek educational context
Creators: name: Προδρόμου, Ευαγγελία Παντελή
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Κίνητρα
Καθηγητές Αγγλικής
Ελληνικό Εκπαιδευτικό Σύστημα
Motivation
English Teachers
Greek Educational Context

description: Σκοπός της διατριβής ήταν η μελέτη των κινήτρων των καθηγητών Αγγλικής σε σχολεία πρωτοβάθμιας και δευτεροβάθμιας εκπαίδευσης. Εξετάστηκε ο ορισμός των κινήτρων καθώς και οι διαφορετικές μορφές κινήτρων. Στη συνέχεια παρουσιάστηκαν οι θεωρίες που υπάρχουν σχετικά με τα κίνητρα. Έγινε ανάλυση των κινήτρων στον εργασιακό χώρο γενικότερα και πιο συγκεκριμένα έγινε σύνδεσή τους με το χώρο της εκπαίδευσης. Συζητήθηκε επιπλέον το θέμα της εργασιακής εξουθένωσης και παρουσιάστηκαν προηγούμενες μελέτες σχετικές με τα κίνητρα των καθηγητών. Παρουσιάστηκαν με λεπτομέρειες οι συνθήκες εργασίας των εκπαιδευτικών Αγγλικής, το προφίλ των συμμετεχόντων στην έρευνα και το ερωτηματολόγιο που χρησιμοποιήθηκε για τη διεξαγωγή της καθώς και οι συνεντεύξεις που κάποιοι από τους συμμετέχοντες δέχθηκαν να παραχωρήσουν. Έγινε ανάλυση των αποτελεσμάτων του ερωτηματολογίου τα οποία παρουσιάστηκαν με λεπτομέρειες στη συνέχεια της διατριβής. Από τα αποτελέσματα προέκυψε ότι οι εκπαιδευτικοί ωθούνται περισσότερο από εσωτερικά παρά εξωτερικά κίνητρα, όπως η αγάπη για τα παιδιά και η διάθεση για προσφορά.
description: The aim of the present thesis was the study of the English teachers’ motivation in primary and secondary schools in Greece. The definition of motivation was given as well as the different types of motivation. In addition to that motivation theories were presented. There was an analysis of work motivation in general with an emphasis on teacher motivation. Additionally, teacher burnout was discussed and previous studies regarding teacher motivation were examined. The working conditions of teachers in the Greek educational context were analyzed as well as the profile of those who participated in the survey. The questionnaire used in the survey was discussed together with the interviews some of the participants agreed to take part in. There was an analysis of the results of the questionnaire which later on were discussed in more detail in the thesis. According to the results of the survey, teachers are more intrinsically than extrinsically motivated, some of their intrinsic motives including love for their learners and the will to offer.
The Orbit of the Eclipsing X-ray Pulsar EXO 1722-363
Creators: name: Thompson, Thomas W. J.
name: Tomsick, John A.
name: Zand, J. J. M. in 't
name: Rothschild, Richard E.
name: Walter, Roland
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: With recent and archival Rossi X-Ray Timing Explorer (RXTE) X-ray measurements of the heavily obscured X-ray pulsar EXO 1722-363 (IGR J17252-3616), we carried out a pulse timing analysis to determine the orbital solution for the first time. The binary system is characterized by a_x sin(i) = 101 +/- 3 lt-s and P_orb = 9.7403 +/- 0.0004 days (90% confidence), with the precision of the orbital period being obtained by connecting datasets separated by more than 7 years (272 orbital cycles). The orbit is consistent with circular, and e < 0.19 at the 90% confidence level. The mass function is 11.7 +/- 1.2 M_sun and confirms that this source is a High Mass X-ray Binary (HMXB) system. The orbital period, along with the previously known ~414 s pulse period, places this system in the part of the Corbet diagram populated by supergiant wind accretors. Using previous eclipse time measurements by Corbet et al. and our orbital solution, combined with the assumption that the primary underfills its Roche lobe, we find i > 61 degrees at the 99% confidence level, the radius of the primary is between 21 R_sun and 37 R_sun, and its mass is less than about 22 M_sun. The acceptable range of radius and mass shows that the primary is probably a supergiant of spectral type B0I-B5I. Photometric measurements of its likely counterpart are consistent with the spectral type and luminosity if the distance to the system is between 5.3 kpc and 8.7 kpc. Spectral analysis of the pulsar as a function of orbital phase reveals an evolution of the hydrogen column density suggestive of dense filaments of gas in the downstream wake of the pulsar, with higher levels of absorption seen at orbital phases 0.5-1.0, as well as a variable Fe K_alpha line.
description: Submitted to ApJ, 11 pages, 11 figures
Ανασκαφών τεκμήρια» Τάφοι και ταφές της Βυζαντινής Θεσσαλονίκης (8ος-14ος αι.)
Creators: name: Μανταζή, Δόμνα Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Βυζαντινή Θεσσαλονίκη
Ταφικά έθιμα
Τυπολογία τάφων
Byzantine Thessaloniki
burial customs
graves typology

description: Η παρούσα εργασία πραγματεύεται τα ανασκαφικά στοιχεία και τα ταφικά έθιμα της Βυζαντινής εποχής στην Θεσσαλονίκη από τον 8ο έως τον 14ο αιώνα. Περιλαμβάνει κατάλογο των δημοσιευμένων ανασκαφών και οργανώνει τα στοιχεία σε τρείς μεγάλες κατηγορίες, α) στον εσωτερικό και περιβάλλοντα χώρο γνωστών και σε χρήση έως σήμερα ναών, β) στα θεμέλια αταύτιστων ναών και γ) στα θεμέλια ρωμαϊκών και παλαιοχριστιανικών εγκαταστάσεων. Τοπογραφικά διαπιστώνεται η εδραίωση της ταφής εντός των τειχών που από τον 9ο αιώνα κατοχυρώνεται και από τη νομοθεσία. Τυπολογικά εντοπίζονται γνωστοί τύποι τάφων από την αρχαιότητα ενώ καθιερώνονται και νέοι όπως τα αρκοσόλια και το κιβώριο της Αγίας Σοφίας. Ο ενταφιασμός αποτελεί τον μοναδικό τρόπο ταφής και οι νεκροί συνοδεύονται από αγγεία και προσωπικά αντικείμενα παρά τις ενστάσεις της επίσημης Εκκλησίας. H μελέτη των πηγών, η εικονογραφία και τα ανασκαφικά στοιχεία, αποκαλύπτουν ότι το τυπικό της ταφής στην Θεσσαλονίκη κατά τη Βυζαντινή περίοδο, παρόλη την προσπάθεια να απαλλαγεί από τα χαρακτηριστικά των «εθνικών», συνεχίζει την Ομηρική παράδοση.
description: The paper at hand deals with the archaeological data and the burial customs of the Byzantine era in Thessaloniki from the 8th to the 14th century. It includes a list of published excavations and organizes data into three broad categories: a) the inside and surrounding areas of known churches that are still in operation, b) the foundations of unidentified temples and c) the foundations of Roman and early Christian establishments. Topographically, burying within the wall perimeter is proven, a fact that is also evident in legislation from the 9th century onwards. Typologically, also known types of tombs are identified from antiquity, while new types are also established, such as the “arcosolia” and the ciborium of St. Sophia. Tomb burial is the only way of burying and the dead are accompanied by pottery and personal items despite the objections raised by the official Church. Study of sources, the iconography and archaeological evidence, prove that the ritual of burial in Thessaloniki during the Byzantine period, despite the effort to dispense of the characteristics of the "nationals", continues the Homeric tradition.
Scalar Glueball, Scalar Quarkonia, and their Mixing
Creators: name: Cheng, Hai-Yang
name: Chua, Chun-Khiang
name: Liu, Keh-Fei
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The isosinglet scalar mesons $f_0(1710)$, $f_0(1500)$, $f_0(1370)$ and their mixing are studied. We employ two recent lattice results as the starting point; one is the isovector scalar meson $a_0(1450)$ which displays an unusual property of being nearly independent of quark mass for quark masses smaller than that of the strange, and the other is the scalar glueball mass at 1710 MeV in the quenched approximation. In the SU(3) symmetry limit, $f_0(1500)$ turns out to be a pure SU(3) octet and is degenerate with $a_0(1450)$, while $f_0(1370)$ is mainly an SU(3) singlet with a slight mixing with the scalar glueball which is the primary component of $f_0(1710)$. These features remain essentially unchanged even when SU(3) breaking is taken into account. We discuss the sources of SU(3) breaking and their consequences on flavor-dependent decays of these mesons. The observed enhancement of $ωf_0(1710)$ production over $ϕf_0(1710)$ in hadronic $J/ψ$ decays and the copious $f_0(1710)$ production in radiative $J/ψ$ decays lend further support to the prominent glueball nature of $f_0(1710)$.
description: 16 pages; add discussions on the justification of the lattice results as input for this work, to appear in Phys. Rev. D