cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
New H1 results on isolated leptons and missing pt at HERA
Creators: name: South, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The search for events containing isolated leptons (electrons or muons) and missing transverse momentum produced in $e^{\pm}p$ collisions is performed with the H1 detector at HERA in the period 1994--2005. The analysed data sample corresponds to an integrated luminosity of 279 pb$^{-1}$, which includes 53 pb$^{-1}$ of $e^{+}p$ data and 107 pb$^{-1}$ of $e^{-}p$ data from the new HERA~II phase. A total of 40 events are observed in the data, compared to a Standard Model (SM) prediction of 34.3 $\pm$ 4.8. At large hadronic transverse momentum $P_{T}^{X} >$ 25 GeV, a total of 17 events are observed compared to 9.0 $\pm$ 1.5 predicted by the SM. In this region, 15 events are observed in the $e^{+}p$ data compared to a SM prediction of 4.6 $\pm$ 0.8, whereas in the $e^{-}p$ data 2 events are observed compared to a SM prediction of 4.4 $\pm$ 0.7.
description: 4 pages, 4 figure; To appear in the proceedings of 14th International Workshop on Deep Inelastic Scattering (DIS 2006), Tsukuba, Japan, 20-24 Apr 2006
The impact of classical and General Relativistic obliquity precessions on the habitability of circumstellar neutron stars' planets
Creators: name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Recently, it has been shown that rocky planets orbiting neutron stars can be habitable under non unrealistic circumstances. If a distant, pointlike source of visible light such as a Sun-like main sequence star or the gravitationally lensed accretion disk of a supermassive black hole is present as well, possible temporal variations $Δ\varepsilon_\mathrm{p}(t)$ of the planet's axial tilt $\varepsilon_\mathrm{p}$ to the ecliptic plane should be included in the overall habitability budget since the obliquity determines the insolation at a given latitude on a body' s surface. I point out that, for rather generic initial spin-orbit initial configurations, general relativistic and classical spin variations induced by the post-Newtonian de Sitter and Lense-Thirring components of the field of the host neutron star and by its pull to the planetary oblateness $J_2^\mathrm{p}$ may induce huge and very fast variations of $\varepsilon_\mathrm{p}$ which would likely have an impact on the habitability of such worlds. In particular, for a planet's distance of, say, $0.005\,\mathrm{au}$ from a $1.4\,M_\odot$ neutron star corresponding to an orbital period $P_\mathrm{b}=0.109\,\mathrm{d}$, obliquity shifts $Δ\varepsilon_\mathrm{p}$ as large as $\varepsilon^\mathrm{max}_\mathrm{p}-\varepsilon_\mathrm{p}^\mathrm{min}\simeq 50^\circ-100^\circ$ over characteristic timescales as short as $10\,\mathrm{d}$ ($J_2^\mathrm{p}$) to $3\,\mathrm{Myr}$ (Lense-Thirring) may occur for arbitrary orientations of the orbital and spin angular momenta $\boldsymbol{L},\,{\boldsymbol{S}}_\mathrm{ns},\,{\boldsymbol{S}}_\mathrm{p}$ of the planet-neutron star system. In view of this feature of their spins, I dub such hypothetical planets as ``nethotrons".
description: laTex2e, 15 pages, 1 table, 4 figures. Version matching the one at press in The Astronomical Journal (AJ)
Stability of the proton-to-electron mass ratio
Creators: name: Shelkovnikov, Alexander
name: Butcher, Robert James
name: Chardonnet, Christian
name: Amy-Klein, Anne
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report a limit on the fractional temporal variation of the proton-to-electron mass ratio as, obtained by comparing the frequency of a rovibrational transition in SF6 with the fundamental hyperfine transition in Cs. The SF6 transition was accessed using a CO2 laser to interrogate spatial 2-photon Ramsey fringes. The atomic transition was accessed using a primary standard controlled with a Cs fountain. This result is direct and model-free.
Η ενεργοποίηση του εγκάρσιου κοιλιακού μυ μετά από δύο παρεμβατικά προγράμματα ισομετρικής και ισοτονικής άσκησης του κορμού
Creators: name: Αγγελοπούλου, Ελένη Πέτρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Εγκάρσιος κοιλιακός μυς
Ισοτονική σύσπαση
Ισομετρική σύσπαση
Transverse abdominal muscle (TrA)
Isotonic contraction
Isometric contraction

description: Ο εγκάρσιος κοιλιακός μυς (TrA) παίζει σημαντικό ρόλο με την ανατομική του μορφολογία αλλά και με τον τρόπο άσκησης του. Η παρούσα έρευνα έχει ιδιαίτερη σημασία προκειμένου να διερευνηθεί η μεταβολή του πάχους του εγκάρσιου κοιλιακού μυός μετά από ένα πρόγραμμα ασκήσεων σταθεροποίησης με δύο είδη σύσπασης ( ισοτονική σύσπαση και ισομετρική σύσπαση ) σε γυναίκες. Το δείγμα που έλαβε μέρος στην μελέτη ήταν 30 υγιείς γυναίκες , ηλικίας 18-65 έτη. Οι γυναίκες χωρίστηκαν τυχαία σε τρεις ομάδες – την Ισοτονική ομάδα ( N=10) , την Ισομετρική ομάδα (Ν=10) και την ομάδα Ελέγχου (Ν=10). Το πρόγραμμα άσκησης διήρκησε 4 εβδομάδες με συχνότητα 3 φορές την εβδομάδα. Πραγματοποιήθηκαν 2 μετρήσεις πριν και μετά το τέλος του προγράμματος. Το όργανο μέτρησης που χρησιμοποιήθηκε για το πάχος του TrA ήταν ο υπέρηχος. Τα αποτελέσματα έδειξαν ότι και τα δύο είδη σύσπασης είχαν μεταβολές στο πάχος του TrA σε όλες τις ασκήσεις, με μεγαλύτερη μεταβολή να σημειώνεται στην ισοτονική σύσπαση. Αναλυτικότερα παρατηρήθηκε στατιστικά σημαντική διαφορά p<0,05 ανάμεσα στις ασκήσεις. Επίσης στατιστικά σημαντική διαφορά p<0,05 υπήρξε μεταξύ των ασκήσεων αλλά και στην αλληλεπίδραση της άσκησης και των ομάδων. Συμπεραίνουμε ότι ένα πρόγραμμα άσκησης βασισμένο σε ασκήσεις σταθεροποίησης μπορεί να μεταβάλλει το πάχος του εγκάρσιου κοιλιακού μυός σε διάρκεια τεσσάρων εβδομάδων.
description: The transverse abdominal muscle (TrA) plays an important role with its anatomical morphology and its way of exercising. The present research is of particular importance in investigating the change in the thickness of transverse abdominal muscle after a program of stabilization exercises with two types of contraction (isotonic contraction and isometric contraction) in women. The sample that was included in the study was 30 healthy women aged 18-65 years. Women were randomly assigned to three groups - the Isotonic group (N = 10), the Isometric group (N = 10) and the Control group (N = 10). The exercise program lasted 4 weeks with a frequency of 3 times a week. Two measurements were made before and after the end of the program. The measuring instrument used for the thickness of TrA was ultrasound. The results showed that both types of contraction had changes in the thickness of TrA in all exercises, with a greater change in isotonic contraction. Analytically, a statistically significant difference of p <0.05 was observed between the exercises. Also a statistically significant difference p <0.05 was between the exercises and the interaction of exercise and groups. We conclude that an exercise program based on stabilization exercises can alter the thickness of the transverse abdominal muscle over a four-week period.
Absence of low temperature anomaly on the melting curve of $^4$He
Creators: name: Todoshchenko, I. A.
name: Alles, H.
name: Junes, H. J.
name: Parshin, A. Ya.
name: Tsepelin, V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have measured the melting pressure and pressure in the liquid at constant density of ultra-pure $^4$He (0.3 ppb of $^3$He impurities) with the accuracy of about 0.5 $μ$bar in the temperature range from 10 to 320 mK. Our measurements show that the anomaly on the melting curve below 80 mK which we have recently observed is entirely due to an anomaly in the elastic modulus of Be-Cu from which our pressure gauge is made of. We thus conclude that the melting pressure of $^4$He follows the $T^4$ law due to phonons in the whole temperature range from 10 to 320 mK without any sign of a supersolid transition.
description: Published in JETP Letters, vol. 85, issue 9, page 555-558 (2007); 4 pages, 2 figures
Precision measurement of solar neutrino oscillation parameters by a long-baseline reactor neutrino experiment in Europe
Creators: name: Petcov, S. T.
name: Schwetz, T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider the determination of the solar neutrino oscillation parameters $Δm^2_{21}$ and $θ_{12}$ by studying oscillations of reactor anti-neutrinos emitted by nuclear power plants (located mainly in France) with a detector installed in the Frejus underground laboratory. The performances of a water Cerenkov detector of 147 kt fiducial mass doped with 0.1% of Gadolinium (MEMPHYS-Gd) and of a 50 kt scale liquid scintillator detector (LENA) are compared. In both cases 3$σ$ uncertainties below 3% on $Δm^2_{21}$ and of about 20% on $\sin^2θ_{12}$ can be obtained after one year of data taking. The Gadolinium doped Super-Kamiokande detector (SK-Gd) in Japan can reach a similar precision if the SK/MEMPHYS fiducial mass ratio of 1 to 7 is compensated by a longer SK-Gd data taking time. Several years of reactor neutrino data collected by MEMPHYS-Gd or LENA would allow a determination of $Δm^2_{21}$ and $\sin^2θ_{12}$ with uncertainties of approximately 1% and 10% at 3$σ$, respectively. These accuracies are comparable to those that can be reached in the measurement of the atmospheric neutrino oscillation parameters $Δm^2_{31}$ and $\sin^2θ_{23}$ in long-baseline superbeam experiments.
description: 16 pages, 6 figures
High contrast and resolution near infrared photometry of the core of R136
Creators: name: Khorrami, Zeinab
name: Langlois, Maud
name: Clark, Paul C.
name: Vakili, Farrokh
name: Buckner, Anne S. M.
name: Gonzalez, Marta
name: Crowther, Paul
name: Wunsch, Richard
name: Palous, Jan
name: Lumsden, Stuart
name: Moraux, Estelle
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the sharpest and deepest near infrared photometric analysis of the core of R136, a newly formed massive star cluster at the centre of the 30 Doradus star forming region in the Large Magellanic Cloud. We used the extreme adaptive optics of the SPHERE focal instrument implemented on the ESO Very Large Telescope and operated in its IRDIS imaging mode, for the second time with longer exposure time in the H- and K filters. Our aim was to (i) increase the number of resolved sources in the core of R136, and (ii) to compare with the first epoch to classify the properties of the detected common sources between the two epochs. Within the field of view (FOV) of 10.8"x12.1" (2.7pc x3.0pc), we detected 1499 sources in both H and K filters, for which 76% of these sources have visual companions closer than 0.2". The larger number of detected sources, enabled us to better sample the mass function (MF). The MF slopes are estimated at ages of 1, 1.5 and 2 Myr, at different radii, and for different mass ranges. The MF slopes for the mass range of 10-300 solar-mass are about 0.3 dex steeper than the mass range of 3-300 solar-mass, for the whole FOV and different radii. Comparing the JHK colours of 790 sources common in between the two epochs, 67% of detected sources in the outer region (r >3") are not consistent with evolutionary models at 1-2 Myr and with extinctions similar to the average cluster value, suggesting an origin from ongoing star formation within 30 Doradus, unrelated to R136.
description: 24 pages, 20 figures, 6 tables. Accepted for publication in MNRAS
HIV λοίμωξη – Ιατρικά δεδομένα / Ηθικά και Νομικά διλήμματα
Creators: name: Προύσαλης, Θεοδόσιος Μιλτιάδη
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ανοσοανεπάρκεια
Λοίμωξη
Βιοηθική
Immunodeficiency
Infection
Bioethics

description: Η παρούσα εργασία έχει ως στόχο την παρουσίαση βασικών ιατρικών και επιδημιολογικών δεδομένων σχετικών με την HIV λοίμωξη και το σύνδρομο της επίκτητης ανοσοανεπάρκειας (AIDS), όπως επίσης και το βασικό νομοθετικό πλαίσιο που διέπει την αντιμετώπιση και το γενικότερο χειρισμό αυτών των περιστατικών. Τέλος, παρουσιάζονται προβληματισμοί σχετικά με την αντιμετώπιση της νόσου από την κοινωνία, την αποτελεσματικότητα της ακολουθούμενης πολιτικής για περιορισμό της νόσου και τις μελλοντικές εξελίξεις γύρω από αυτήν. Η παρούσα εργασία εκπονήθηκε λαμβάνοντας υπόψη τη διατμηματική φύση του μεταπτυχιακού προγράμματος, με στόχο την παρουσίαση πολύπλευρων δεδομένων κατανοητών σε κάθε επιστήμη.
description: Current paper aims at presenting fundamental knowledge over HIV infection, AIDS and relevant epidemiology, as well as legal management in relevant cases. In addition, reflections over society’s views towards AIDS and current international and local policy on restricting the number of new infections are being discussed. Current paper was written in the spirit of the multilateral nature of master program, aiming at being clear at all people interested in this matter, regardless their medical, legal or theological expertise.
New Perspectives on Network-Based Modeling and Control of Articulated Robots
Creators: name: Lane, Jonathan Gaetano
Publisher: name: Purdue University Graduate School
Year: 2025
Subjects: classificationCode: 400799
subject: Control engineering, mechatronics and robotics not elsewhere classified

description: Multi-agent systems theory has been widely used in robotics to control robot swarms, where a network defines the agents which share information. However research on network-based modeling of articulated systems is more limited, but has shown promise in various applications, from dynamical system simulations, to physical approximations of an oscillatory model. Taking inspiration from these theories, we consider a single articulated robotic (SAR) system as a network, where the nodes correspond to rigid links in the system, and holonomic constraints connecting links are the edges. Using constrained Lagrangian dynamics, the dynamics are derived in both absolute and relative coordinates using familiar graph matrices and similarities are drawn with multi-agent consensus. Based on the dynamics formulation, a decentralized control framework is developed to control the local configuration of the system. We extend the theory to spatial systems and show the main results still hold. To demonstrate the methods, a SAR system is approximated with a network of physically constrained quadrotors, fixed together with lightweight rods. Time-varying trajectory tracking is demonstrated in simulation and on hardware with Crazyflie quadrotors.
Compressible advection of a passive scalar: Two-loop scaling regimes
Creators: name: Hnatich, M.
name: Jurcisinova, E.
name: Jurcisin, M.
name: Repasan, M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: The influence of compressibility on the stability of the scaling regimes of the passive scalar advected by a Gaussian velocity field with finite correlation time is investigated by the field theoretic renormalization group within two-loop approximation. The influence of compressibility on the scaling regimes is discussed as a function of the exponents $ε$ and $η$, where $ε$ characterizes the energy spectrum of the velocity field in the inertial range $E\propto k^{1-2ε}$, and $η$ is related to the correlation time at the wave number $k$ which is scaled as $k^{-2+η}$. The restrictions given by nonzero compressibility on the regions with stable infrared fixed points which correspond to the stable infrared scaling regimes are discussed in detail. A special attention is paid to the case of so-called frozen velocity field, when the velocity correlator is time independent. In this case, explicit inequalities which must be fulfilled in the plane $ε-η$ are determined within two-loop approximation. The existence of a "critical" value $α_c$ of the parameter of compressibility $α$ at which one of the two-loop conditions is canceled as a result of the competition between compressible and incompressible terms is discussed. Brief general analysis of the stability of the scaling regime of the model with finite correlations in time of the velocity field within two-loop approximation is also given.
description: 16 pages, Talk presented by M. Jurcissin at the Conference "Renormalization Group 2005", Helsinki, Finland 30 August - 3 September 2005. To apear in J. Phys. A: Math. Gen
On Winning Conditions of High Borel Complexity in Pushdown Games
Creators: name: Finkel, Olivier
Publisher: name: arXiv
Year: 2008
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Computer Science and Game Theory (cs.GT)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Some decidable winning conditions of arbitrarily high finite Borel complexity for games on finite graphs or on pushdown graphs have been recently presented by O. Serre in [ Games with Winning Conditions of High Borel Complexity, in the Proceedings of the International Conference ICALP 2004, LNCS, Volume 3142, p. 1150-1162 ]. We answer in this paper several questions which were raised by Serre in the above cited paper. We first show that, for every positive integer n, the class C_n(A), which arises in the definition of decidable winning conditions, is included in the class of non-ambiguous context free omega languages, and that it is neither closed under union nor under intersection. We prove also that there exists pushdown games, equipped with such decidable winning conditions, where the winning sets are not deterministic context free languages, giving examples of winning sets which are non-deterministic non-ambiguous context free languages, inherently ambiguous context free languages, or even non context free languages.
Scanning probe imaging of coexistent ferromagnetism and ferroelectricity at room temperature
Creators: name: Palkar, V. R.
name: Purandare, S. C.
name: Gohil, S.
name: John, J.
name: Bhattacharya, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Room temperature coexistence of ferromagnetism and ferroelectricity in a thin film of a novel material of nominal composition PbTi0.5Fe0.5O3-d is probed by standard ferroelectric and ferromagnetic hysteresis loop measurements and by scanning probe microscopy of various kinds. Both magnetic domains and ferroelectric domains are observed in the same spatial region of the material, implying phase coexistence in this system. For both order parameters, sample morphology strongly affects roughness of the domain walls.
description: 15 pages, 5 figures
Full counting statistics of transport through two-channel Coulomb blockade systems
Creators: name: Wang, Shi-Kuan
name: Jiao, Hujun
name: Li, Feng
name: Li, Xin-Qi
name: Yan, YiJing
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: A mesoscopic Coulomb blockade system with two identical transport channels is studied in terms of full counting statistics. It is found that the average current cannot distinguish the quantum constructive interference from the classical non-interference, but the shot noise and skewness are more sensitive to the nature of quantum mechanical interference and can fulfill that task. The interesting super-Poisson shot noise is found and is demonstrated as a consequence of constructive interference, which induces an effective system with fast-and-slow transport channels. Dephasing effects on the counting statistics are carried out to display the continuous transition from quantum interfering to non-interfering transports.
description: 7pages, 3figures, submitted
Random Phase Approximation for gapped systems: role of vertex corrections and applicability of the constrained random phase approximation
Creators: name: van Loon, Erik G. C. P.
name: Rösner, Malte
name: Katsnelson, Mikhail I.
name: Wehling, Tim O.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The many-body theory of interacting electrons poses an intrinsically difficult problem that requires simplifying assumptions. For the determination of electronic screening properties of the Coulomb interaction, the Random Phase Approximation (RPA) provides such a simplification. Here, we explicitly show that this approximation is justified for band structures with sizeable band gaps. This is when the electronic states responsible for the screening are energetically far away from the Fermi level, which is equivalent to a short electronic propagation length of these states. The RPA contains exactly those diagrams in which the classical Coulomb interaction covers all distances, whereas neglected vertex corrections involve quantum tunneling through the barrier formed by the band gap. Our analysis of electron-electron interactions provides a real-space analogy to Migdal's theorem on the smallness of vertex corrections in electron-phonon problems. An important application is the increasing use of constrained Random Phase Approximation (cRPA) calculations of effective interactions. We find that their usage of Kohn-Sham energies already accounts for the leading local (excitonic) vertex correction in insulators.
1/16-BPS Black Holes and Giant Gravitons in the AdS_5 X S^5 Space
Creators: name: Kim, Seok
name: Lee, Ki-Myeong
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore 1/16-BPS objects of type IIB string theory in AdS_5 * S^5. First, we consider supersymmetric AdS_5 black holes, which should be 1/16-BPS and have a characteristic that not all physical charges are independent. We point out that the Bekenstein-Hawking entropy of these black holes admits a remarkably simple expression in terms of (dependent) physical charges, which suggests its microscopic origin via certain Cardy or Hardy-Ramanujan formula. We also note that there is an upper bound for the angular momenta given by the electric charges. Second, we construct a class of 1/16-BPS giant graviton solutions in AdS_5 * S^5 and explore their properties. The solutions are given by the intersections of AdS_5 * S^5 and complex 3 dimensional holomorphic hyperspaces in C^{1+5}, the latter being the zero loci of three holomorphic functions which are homogeneous with suitable weights on coordinates. We investigate examples of giant gravitons, including their degenerations to tensionless strings.
description: 25 pages, no figures, v2: references added, comments added in the conclusion
Slow crack growth : models and experiments
Creators: name: Santucci, Stéphane
name: Vanel, Loic
name: Ciliberto, Sergio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The properties of slow crack growth in brittle materials are analyzed both theoretically and experimentally. We propose a model based on a thermally activated rupture process. Considering a 2D spring network submitted to an external load and to thermal noise, we show that a preexisting crack in the network may slowly grow because of stress fluctuations. An analytical solution is found for the evolution of the crack length as a function of time, the time to rupture and the statistics of the crack jumps. These theoretical predictions are verified by studying experimentally the subcritical growth of a single crack in thin sheets of paper. A good agreement between the theoretical predictions and the experimental results is found. In particular, our model suggests that the statistical stress fluctuations trigger rupture events at a nanometric scale corresponding to the diameter of cellulose microfibrils.
description: to be published in EPJ (European Physical Journal)
A Discriminative Entity-Aware Language Model for Virtual Assistants
Creators: name: Saebi, Mandana
name: Pusateri, Ernest
name: Meghawat, Aaksha
name: Van Gysel, Christophe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: High-quality automatic speech recognition (ASR) is essential for virtual assistants (VAs) to work well. However, ASR often performs poorly on VA requests containing named entities. In this work, we start from the observation that many ASR errors on named entities are inconsistent with real-world knowledge. We extend previous discriminative n-gram language modeling approaches to incorporate real-world knowledge from a Knowledge Graph (KG), using features that capture entity type-entity and entity-entity relationships. We apply our model through an efficient lattice rescoring process, achieving relative sentence error rate reductions of more than 25% on some synthesized test sets covering less popular entities, with minimal degradation on a uniformly sampled VA test set.
description: To appear in Interspeech 2021
Prediction of housing prices based on spatial and social parameters using regression and deep learning methods
Creators: name: Βούτας-Χατζίδης, Ιωάννης
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Μηχανική μάθηση
Τεχνητή νοημοσύνη
Πρόβλεψη αξίας σπιτιών
Machine learning
Artificial Intelligence
Prediction of housing prices

description: Ο τομέας της εκτίμησης ακινήτων γίνεται παραδοσιακά χρησιμοποιώντας κλασσικά μοντέλα γραμμικής παλινδρόμησης, παρόλο που η συσχέτιση μεταξύ των χαρακτηριστικών τιμής και του σπιτιού είναι γνωστό ότι είναι πολύπλοκη και μη γραμμική. Σε αυτή τη διατριβή, εισάγονται πολλοί αλγόριθμοι μηχανικής μάθησης καθώς και ένα βαθύ πλαίσιο μάθησης (Keras), που ενσωματώνουν μια σειρά προχωρημένων μοντέλων παλινδρόμησης που είναι σε θέση να μάθουν τη μη γραμμικότητα καθώς και να προβλέψουν την τιμή μιας κατοικίας. Τα αποτελέσματά μας δείχνουν ότι μπορεί να επιτευχθεί σημαντικά υψηλή ακρίβεια πρόβλεψης μέσω αυτού του θέματος, αν και όλα τα μοντέλα δεν είναι σταθερά ακριβή. Η προεπεξεργασία δεδομένων πραγματοποιείται στο σύνολο δεδομένων μας, προκειμένου να δημιουργηθούν τρία κατανεμημένα, συσχετισμένα και ολοκληρωμένα σύνολα δεδομένων για τη χρήση τους για εκπαίδευση, επικύρωση και δοκιμή. Επιπλέον, ο συντονισμός των υπερπαραμέτρων των αλγορίθμων μηχανικής μάθησης εφαρμόζεται προκειμένου να ενισχυθεί η αρχική ακρίβεια. Χρησιμοποιείται και ένα βαθύ νευρωνικό δίκτυο που χρησιμοποιεί το πλαίσιο Keras, αλλά τα αποτελέσματα δεν είναι τόσο υψηλά όσο αναμενόταν, λόγω του γεγονότος ότι οι μέθοδοι βαθιάς εκμάθησης συνήθως εκτελούνται καλά σε τεράστια σύνολα δεδομένων. Τέλος, η λύση είναι ο αλγόριθμος παλινδρόμησης CatBoost, με αποτέλεσμα την ακρίβεια 90,00%.
description: The domain of Real Estate appraisal is traditionally done using classic linear regression models, even though the correlation between price and house attributes is known to be complex and non-linear. In this thesis, a lot of machine learning algorithms as well as a deep learning framework (Keras) are introduced, that incorporate a range of advanced regression models that are capable of learning non-linearity as well as to predict the price of a dwelling. Our results show that a considerably high predictive accuracy can be achieved through this topic, although all the models are not consistently accurate. Data Pre-processing is performed on our dataset in order to create three distributed, correlated and completed datasets for using them for training, validation and testing. Furthermore, tuning of machine learning algorithms’ hyperparameters is implemented in order to enhance the initial accuracy. A deep neural network using Keras framework is built as well, but the results are not as high as we expected, due to the fact that the deep learning methods usually perform well on huge datasets. Finally, the solution being the CatBoost regression algorithm, resulting in an accuracy of 90.00 percent.
description: Σε συνεργσία με: Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Shakespeare's Sonnets. Monumenti, rime, rovine. Scorci sul gusto nelle traduzioni italiane e francesi
Creators: name: Da Re, Maria Silvia
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2015

description: In her thorough essay, Maria Silvia Da Re discusses the French and Italian tradition of the Sonnets, strictly linked, especially considering the point of view of the taste. Notwithstanding the inherent ambiguity of this subject, about which several parameters are here made explicit, the various ‘standards’ of taste turn out to be a sort of litmus paper of the values conveyed by translation, not necessarily or straightforwardly related to the selected style. But then, which style does really belong to the shaping of poetic translation?
description: Lebenswelt. Aesthetics and philosophy of experience., No 6 (2015)
Situazione e ripetizione: Debord e Deleuze
Creators: name: Angelucci, Daniela
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2015

description: The focus of this article is on the concept of “situation”, which lies at the very origin of the Situationist International, as it has been theorized in particular by Guy Debord. The aim of this paper will be to show the relationship between Debord’s concept of situation and the concept of repetition as theorized by Deleuze in Difference and repetition (1968). Such a conceptual proximity allows us to grasp some less known aspects of Debord’s thought, in respect to the critical part of his own reflection, which is much more known. Both authors share a similar conception about the peculiar structure of repetition like its own specific temporality. Such a commonality is manifest in various typical situationist proceedings; in particular: dérive, détournement and cinema (considered as way to overcome the alienation of art).
description: Lebenswelt. Aesthetics and philosophy of experience., No 6 (2015)
title: Adjuvant endocrine therapy use in female breast cancer survivors and the risk of cardiovascular disease
Creators: name: Matthews, A
Publisher: name: London School of Hygiene & Tropical Medicine
Year: 2020

description: BACKGROUND: Women diagnosed with oestrogen receptor positive breast cancer are prescribed endocrine therapies, tamoxifen or aromatase inhibitors (AI), to block the effects of oestrogen on the growth of tumour cells. Tamoxifen is known to be associated with an increased risk of venous thromboembolic events, but the long-term effect of both tamoxifen and AI use on the risk of a range of distinct cardiovascular diseases (CVD) remain unclear. METHODS: Two studies were carried out using prospectively collected data from the UK Clinical Practice Datalink linked with Hospital Episode Statistics, and data from the US SEER-Medicare database, to assemble cohorts of postmenopausal women diagnosed with breast cancer. Cox proportional hazards regression models were used to examine the associations between tamoxifen and AIs and a comprehensive range of CVDs in both the UK and US study populations. The UK study directly compared AI users with tamoxifen users; the US study included a third “unexposed” group of women with oestrogen receptor positive breast cancer prescribed no endocrine therapies. RESULTS: Results in the UK study suggested a pattern of an increased risk of non-venous CVDs in AI compared with tamoxifen users, with evidence of an increased risk of heart failure and arrhythmias in AI compared with tamoxifen users (adjusted HR: 1.70, 95% CI: 1.26-2.29; adjusted HR: 1.38, 95% CI 1.12-1.70 respectively). The US study then suggested that these associations may be driven by a decreased risk of non-venous CVD outcomes in tamoxifen users compared with those unexposed, with adjusted HRs ranging from 0.44 (95% CI: 0.30-0.63) in the myocardial infarction analysis to 0.91 (95% CI: 0.75-1.10) in the peripheral vascular disease analysis. Evidence of a modest reduced risk of several non-venous CVD outcomes among AI users compared with those unexposed was also observed, but results were suggestive of residual confounding. As expected there were more venous thromboembolic events in tamoxifen users compared with both AI users and those unexposed. There was a general consistency between comparable results in the two studies. CONCLUSIONS: Among postmenopausal women diagnosed with breast cancer, there was convincing evidence of a higher risk of several non-venous CVDs in those prescribed an AI compared with those prescribed tamoxifen, but this appeared to be driven by protective effects of tamoxifen on these outcomes, rather than any toxic effects of AIs. The known association between tamoxifen use and an increased risk of venous thromboembolism was also confirmed. As more postmenopausal women diagnosed with oestrogen receptor positive breast cancer are prescribed AIs rather than tamoxifen, additional large-scale population based studies are needed to better understand the risk-benefit balance of endocrine therapies with respect to both cancer and cardiovascular outcomes.
Exact Spectral Analysis of Single-h and Multi-h CPM Signals through PAM decomposition and Matrix Series Evaluation
Creators: name: Cariolaro, G.
name: Erseghe, T.
name: Laurenti, N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this paper we address the problem of closed-form spectral evaluation of CPM. We show that the multi-h CPM signal can be conveniently generated by a PTI SM. The output is governed by a Markov chain with the unusual peculiarity of being cyclostationary and reducible; this holds also in the single-h context. Judicious reinterpretation of the result leads to a formalization through a stationary and irreducible Markov chain, whose spectral evaluation is known in closed-form from the literature. Two are the major outcomes of this paper. First, unlike the literature, we obtain a PSD in true closed-form. Second, we give novel insights into the CPM format.
description: 31 pages, 10 figures
title: The Effect of Viral Vaccines on Natural Killer Cell Effector Function
Creators: name: Wagstaffe, HR
Publisher: name: London School of Hygiene & Tropical Medicine
Year: 2020

description: Natural killer cells are large, granular, innate lymphoid cells that lie at the interface between innate and adaptive immunity and facilitate bidirectional crosstalk between the two systems. This has led to an abundance of research into vaccination induced priming of ‘adaptive’ or memory-like NK cell responses. Using human peripheral blood mononuclear cells for cross-sectional and vaccination studies in two distinct virus models, cytokine-dependent NK cell activation, and the effect of vaccination on these responses was investigated. Very low concentrations of IL-15 enhanced NK cell activation in response to inactivated influenza virus stimulation in vitro via augmented innate cytokine secretion from accessory cells, in particular IL-12 from myeloid dendritic cells. Similarly, after seasonal influenza vaccination, both accessory cell cytokine secretion and NK cell activation were enhanced compared to before vaccination in response to low dose IL-15 stimulation in vitro. This suggested that together with a vaccination-induced enhanced responsiveness to innate cytokines at the NK cell level (the generation of cytokine-induced memory like NK cells), an increased production of innate cytokines at the accessory cell level contributed to the overall enhancement in NK cell response post-vaccination. The effect of vaccination on NK cell effector function was further investigated in PBMC from heathy volunteers vaccinated with an Ebola glycoprotein expressing, vectored, prime-boost regimen vaccine (Ad26.ZEBOV/MVA-BN-Filo). Both inactivated influenza vaccination and Ebola vaccination increased the frequency and proliferation of less differentiated, CD56bright NK cells. Data described in this thesis also demonstrate for the first time that NK cells were activated indirectly by Ebola glycoprotein induced IL-12 and IL-18, independently of Ebola vaccination, and in contrast to influenza vaccination, there was no evidence of vaccine induced boosting of these responses. NK cell responses to Ebola GP were dependent on accessory cell TLR-4 engagement but were tightly regulated by CD14+ monocyte-derived IL-10. In addition to soluble antigen driven cytokinedependent activation, 21-day post-boost vaccination serum induced robust antibody-dependent NK cell activation of more differentiated subsets that varied with vaccine arm and correlated with antibody titre. Together, these studies demonstrate that two different types of vaccines against distinct viruses have similar impacts on the activation of less differentiated NK cells. Priming of both NK cells and myeloid cells for enhanced cytokinedependent NK cell responses after vaccination was not replicated across different vaccination models and may be a function dependent on the unique cytokine signatures induced by the respective antigens. These studies further our understanding of NK cells in post-vaccination effector responses, and may represent an avenue for improving future design of vaccines and adjuvants.
Η αποτελεσματικότητα ενός προγράμματος δημιουργικού χορού στην ρυθμική ικανότητα μαθητών/τριών πρωτοβάθμιας εκπαίδευσης
Creators: name: Ρίζου, Αθανασία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: δημιουργικός χορός
ρυθμική ικανότητα
κινητική δημιουργικότητα
πρωτοβάθμια εκπαίδευση
creative dance
rhythmic ability
creative movement
primary school

description: Ο σκοπός της παρούσας μελέτης ήταν η ανίχνευση της αποτελεσματικότητας ενός προγράμματος δημιουργικού χορού, βασισμένο στο πρόγραμμα της Stinson (1988), στην ρυθμική ικανότητα μαθητών -τριών της πρωτοβάθμιας εκπαίδευσης, και συγκεκριμένα Α΄ Δημοτικού. Στην έρευνα έλαβαν μέρος 68 παιδιά (38 αγόρια, 30 κορίτσια) ηλικίας από 6 έως 7 ετών. Από το σύνολο του δείγματος, τα 33 παιδιά αποτέλεσαν την ομάδα παρέμβασης (19 αγόρια, 14 κορίτσια, 5.68±.65 έτη), τα οποία παρακολούθησαν ένα πρόγραμμα δημιουργικού χορού διάρκειας 8 εβδομάδων, με συχνότητα 3 φορές την εβδομάδα για 40 λεπτά ανά μάθημα. Τα υπόλοιπα 35, αποτέλεσαν την ομάδα ελέγχου, τα οποία παρακολούθησαν το πρόγραμμα Φυσικής Αγωγής (19 αγόρια, 16 κορίτσια, 5.46±.65 ετών). Για τη μέτρηση ρυθμικής ικανότητας πριν και μετά την εφαρμογή του προγράμματος, εφαρμόστηκε το τεστ της KΑPA-INVENT. Σύμφωνα με τα αποτελέσματα της έρευνας παρουσιάστηκε σημαντική βελτίωση στην ομάδα παρέμβασης μετά την εφαρμογή του προγράμματος. Το συμπέρασμα της εργασίας αυτής είναι ότι ένα πρόγραμμα δημιουργικού χορού έχει θετική επίδραση στην ρυθμική ικανότητα των παιδιών πρωτοβάθμιας εκπαίδευσης
description: The purpose of this study was to investigate the effectiveness of a creative dance program based on the Stinson (1988) program, on rhythmic ability in particular grade 1 of primary school. 68 children (38 boys, 30 girls) aged 6 to 7 took part in the survey. Out of the sample, the 33 children were the intervention team, attending an 8-week creative dance program, with a frequency of 3 times per week for 40 minutes per lesson. The remaining 35 were the control group who attended the Physical Education program. For the rhythmic ability measurement, before and after the program the test of KΑPA-INVENT was used to measure the response time. According to the results of the survey, there was a significant improvement in the intervention team after the implementation of the program. The conclusion of this study is that a creative dance program has a positive effect on children's rhythmic ability
Fisiognomica emozionale. Affordances, estasi, atmosfere
Creators: name: Griffero, Tonino
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2015

description: Through an atmospherological approach, primarily inspired by the so-called Aisthetik or New Aesthetics (Gernot Böhme) and the New Phenomenology (Hermann Schmitz), the paper defines the atmospheric perception as a first pathemic impression and investigates the relationship between this kind of perception and the expressive qualities of the surrounding spaces. The aim is to understand atmospheres as (amodal, transmodal, sinaesthetic) affordances that permeate the lived space, namely as ‘ecological’ and affective invites or meanings which are ontologically rooted in things and quasi-things.
description: Lebenswelt. Aesthetics and philosophy of experience., No 6 (2015)
Lexical and grammatical elicitation: Perception vocabulary, nasal harmony morphophonology
Creators: name: Gómez, María
name: Russell, Katherine
name: Dabkowski, Maksymilian
name: Jarvis, Rebecca
name: Michael, Lev
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: gug

description: Rightward nasal spreading from roots onto suffixes.
Prospects for the Observation of Primordial Black Hole evaporation with the Southern Wide Field of View Gamma-ray Observatory
Creators: name: López-Coto, R.
name: Doro, M.
name: de Angelis, A.
name: Mariotti, M.
name: Harding, J. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Primordial Black Holes (PBHs) are remnants of objects formed in the early Universe. Their lifetime is an increasing function of their mass, so PBHs in the right mass range can end their lives in an evaporation event that is potentially detectable by our instruments now. This evaporation may result in a $γ$-ray flash that can be detected by the current generation of Very-High-Energy $γ$-ray detectors. The Southern Wide field of view Gamma-ray Observatory (SWGO) will be part of the next generation of these instruments. It will be able to establish limits on PBH evaporations for integration windows between 0.5 and 5 s, in a radius of 0.25 pc around the Earth, being sensitive to a rate of the order of $\sim$50 pc$^{-3}$ yr$^{-1}$, more than one order of magnitude more constraining than the currently established best limits.
description: Accepted by JCAP
Music as atmosphere. Lines of becoming in congregational worship
Creators: name: Riedel, Friedlind
Publisher: name: Lebenswelt. Aesthetics and philosophy of experience.
Year: 2015

description: In this paper I offer critical attention to the notion of atmosphere in relation to music. By exploring the concept through the case study of the Closed Brethren worship services, I argue that atmosphere may provide analytical tools to explore the ineffable in ecclesial practices. Music, just as atmosphere, commonly occupies a realm of ineffability and undermines notions such as inside and outside, subject and object. For this reason I present music as a means of knowing the atmosphere. The first part of this paper points to the limits of an understanding of atmosphere as a constellation of things, as proposed by Gernot Böhme. In contrast to this, Hermann Schmitz conceptualises atmosphere as half-thing which suggests movement. Drawing on this, I propose to methodologically approach atmospheres as movements. Consequently, in the second part of this paper I closely analyse two motions as they cohere in Closed Brethren worship services: first, becoming (Deleuze and Guattari), a movement on the level of the individual worshiper; secondly, territorialisation (Deleuze and Guattari), a movement of the atmosphere towards its solidification. Here music as atmosphere is not a system of moral signification but a generative power affording intimate processes of divine encounter, whilst producing affective denominational difference.
description: Lebenswelt. Aesthetics and philosophy of experience., No 6 (2015)
New observations of the extended hydrogen exosphere of the extrasolar planet HD209458b
Creators: name: Ehrenreich, David
name: Etangs, Alain Lecavelier des
name: Hébrard, Guillaume
name: Désert, Jean-Michel
name: Vidal-Madjar, Alfred
name: McConnell, John C.
name: Parkinson, Christopher D.
name: Ballester, Gilda E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Atomic hydrogen escaping from the planet HD209458b provides the largest observational signature ever detected for an extrasolar planet atmosphere. However, the Space Telescope Imaging Spectrograph (STIS) used in previous observational studies is no longer available, whereas additional observations are still needed to better constrain the mechanisms subtending the evaporation process, and determine the evaporation state of other `hot Jupiters'. Here, we aim to detect the extended hydrogen exosphere of HD209458b with the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST) and to find evidence for a hydrogen comet-like tail trailing the planet, which size would depend on the escape rate and the amount of ionizing radiation emitted by the star. These observations also provide a benchmark for other transiting planets, in the frame of a comparative study of the evaporation state of close-in giant planets. Eight HST orbits are used to observe two transits of HD209458b. Transit light curves are obtained by performing photometry of the unresolved stellar Lyman-alpha emission line during both transits. Absorption signatures of exospheric hydrogen during the transit are compared to light curve models predicting a hydrogen tail. Transit depths of (9.6 +/- 7.0)% and (5.3 +/- 10.0)% are measured on the whole Lyman-alpha line in visits 1 and 2, respectively. Averaging data from both visits, we find an absorption depth of (8.0 +/- 5.7)%, in good agreement with previous studies. The extended size of the exosphere confirms that the planet is likely loosing hydrogen to space. Yet, the photometric precision achieved does not allow us to better constrain the hydrogen mass loss rate.
description: Accepted for publication in Astronomy & Astrophysics. 5 pages, 3 figures
Coherent current states in a two-band superconductor
Creators: name: Yerin, Y. S.
name: Omelyanchouk, A. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Homogeneous current states in thin films and Josephson current in superconducting microbridges are studied within the frame of a two-band Ginzburg-Landau theory. By solving the coupled system of equations for two order parameters the depairing current curves and Josephson current-phase relation are calculated for different values of phenomenological parameters gamma and eta. Coefficients gamma and eta describe the coupling of order parameters (proximity effect) and their gradients (drag effect) respectively. For definite values of parameters the dependence of current j on superfluid momentum contains local minimum and corresponding bi-stable states. It is shown that the Josephson microbridge from two-band superconductor can demonstrate pi-junction behaviour.
description: 19 pages, 6 figures (some references are corrected and added)