cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Direct Estimation of Spinal Cobb Angles by Structured Multi-Output Regression
Creators: name: Sun, Haoliang
name: Zhen, Xiantong
name: Bailey, Chris
name: Rasoulinejad, Parham
name: Yin, Yilong
name: Li, Shuo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The Cobb angle that quantitatively evaluates the spinal curvature plays an important role in the scoliosis diagnosis and treatment. Conventional measurement of these angles suffers from huge variability and low reliability due to intensive manual intervention. However, since there exist high ambiguity and variability around boundaries of vertebrae, it is challenging to obtain Cobb angles automatically. In this paper, we formulate the estimation of the Cobb angles from spinal X-rays as a multi-output regression task. We propose structured support vector regression (S^2VR) to jointly estimate Cobb angles and landmarks of the spine in X-rays in one single framework. The proposed S^2VR can faithfully handle the nonlinear relationship between input images and quantitative outputs, while explicitly capturing the intrinsic correlation of outputs. We introduce the manifold regularization to exploit the geometry of the output space. We propose learning the kernel in S2VR by kernel target alignment to enhance its discriminative ability. The proposed method is evaluated on the spinal X-rays dataset of 439 scoliosis subjects, which achieves the inspiring correlation coefficient of 92.76% with ground truth obtained manually by human experts and outperforms two baseline methods. Our method achieves the direct estimation of Cobb angles with high accuracy, which indicates its great potential in clinical use.
description: Proceedings of International Conference on Information Processing in Medical Imaging (IPMI 2017)
Electroosmosis as a probe for electrostatic correlations
Creators: name: Palaia, Ivan
name: Telles, Igor M.
name: Santos, Alexandre P. dos
name: Trizac, Emmanuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the role of ionic correlations on the electroosmotic flow in planar double-slit channels, without salt. We propose an analytical theory, based on recent advances in the understanding of correlated systems. We compare the theory with mean-field results and validate it by means of dissipative particle dynamics simulations. Interestingly, for some surface separations, correlated systems exhibit a larger flow than predicted by mean-field. We conclude that the electroosmotic properties of a charged system can be used, in general, to infer and weight the importance of electrostatic correlations therein.
description: accepted for publication in Soft Matter
GMASS Ultradeep Spectroscopy of Galaxies at redshift z~2. I. The stellar metallicity
Creators: name: Halliday, C.
name: Daddi, E.
name: Cimatti, A.
name: Kurk, J.
name: Renzini, A.
name: Mignoli, M.
name: Bolzonella, M.
name: Pozzetti, L.
name: Dickinson, M.
name: Zamorani, G.
name: Berta, S.
name: Franceschini, A.
name: Cassata, P.
name: Rodighiero, G.
name: Rosati, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Galaxy metallicities have been measured to redshift z~2 by gas-phase oxygen abundances of the interstellar medium using the R23 and N2 methods. Galaxy stellar metallicities provide crucial data for chemical evolution models but have not been assessed reliably much outside the local Universe. Aims: We determine the iron-abundance, stellar metallicity of star-forming galaxies (SFGs) at redshift z~2, observed as part of the Galaxy Mass Assembly ultra-deep Spectroscopic Survey (GMASS). Methods: We compute the equivalent width of a rest-frame mid-ultraviolet, photospheric absorption-line index, the 1978 index found to vary monotonically with stellar metallicity by Rix and collaborators. We normalise and combine 75 SFG spectra from the GMASS survey to produce a spectrum corresponding to a total integration time 1652.5 hours (and a signal-to-noise ratio ~100 for our 1.5 angstrom binning) of FORS2 spectroscopic observations at the Very Large Telescope. Results: We measure an iron-abundance, stellar metallicity of log (Z/Zsolar) = -0.574+/-0.159 for our spectrum representative of a galaxy of stellar mass 9.4 x 10^9 Msolar assuming a Chabrier IMF. We find that the R04 model SFG spectrum for log (Z/Zsolar) = -0.699 solar metallicity provides the best description of our GMASS coadded spectrum. For similar galaxy stellar mass, our stellar metallicity is ~0.25 dex lower than the oxygen-abundance, gas-phase metallicity quantified by Erb and collaborators for UV-selected star-forming galaxies at z=2. Conclusions: We conclude that we are witnessing the establishment of a light-element overabundance in galaxies as they are being formed at redshift z~2. Our measurements are reminiscent of the alpha-element enhancement seen in low-redshift, galactic bulges and early-type galaxies. (Abridged)
description: Accepted for publication in Astronomy and Astrophysics on 18 December 2007, 9 pages, 8 figures, aa.bst and aa.cls A&A style files
Pulse and hold strategy for switching current measurements
Creators: name: Walter, Jochen
name: Tholen, Erik
name: Sjostrand, Joachim
name: Haviland, David B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We investigate by theory and experiment, the Josephson junction switching current detector in an environment with frequency dependent damping. Analysis of the circuit's phase space show that a favorable topology for switching can be obtained with overdamped dynamics at high frequencies. A pulse-and-hold method is described, where a fast switch pulse brings the circuit close to an unstable point in the phase space when biased at the hold level. Experiments are performed on Cooper pair transistors and Quantronium circuits, which are overdamped at high frequencies with an on-chip RC shunt. For 20 us switch pulses the switching process is well described by thermal equilibrium escape, based on a generalization of Kramers formula to the case of frequency dependent damping. A capacitor bias method is used to create very rapid, 25 ns switch pulses, where it is observed that the switching process is not governed by thermal equilibrium noise.
description: 11 pages, 8 figures, added references in chapter I, changed text in chapter II, III, V and VII
Dynamic reservation TDMA medium access control protocol for wireless ATM networks
Creators: name: Frigon, Jean-François
Publisher: name: University of British Columbia
Year: 2009

description: To meet the anticipated demand for wireless access to the broadband Asynchronous Transfer Mode (ATM) network, the concept of wireless ATM has been proposed in 1994 [1]. One of the main challenge in the design of a wireless ATM network resides in the conception of a Medium Access Control (MAC) protocol that will handle the different ATM services while providing an efficient utilization of the wireless channel. In this thesis, we propose a new Dynamic Reservation TDMA (DR-TDMA) MAC protocol for wireless ATM networks. DR-TDMA combines the advantage of distributed access and centralized control for transporting Constant Bit Rate (CBR), Variable Bit Rate (VBR) and Available Bit Rate (ABR) traffic efficiently over a wireless channel. The contention slots access is governed by the novel framed pseudo-Bayesian priority Aloha protocol that we introduce in this thesis. This protocol minimizes the contention delay and provides different access priorities for heterogeneous traffic. Simulation results indicate that the framed pseudo-Bayesian priority protocol offers a significant delay improvement for high priority packets with both Poisson and self-similar traffic, while low priority packets only experience a slight performance degradation. In the context of the DR-TDMA protocol, results show that the priority algorithm improves real-time traffic Quality-of-Service (QoS). The DR-TDMA resource allocation algorithm grants to terminals reserved access to the wireless ATM channel by considering their requested bandwidth and QoS. We propose scheduling algorithms for CBR, voice, VBR and ABR traffic. We also introduce a method to dynamically adjust the number of uplink control slots per frame as a function of the estimated contention traffic. Furthermore, the DR-TDMA protocol features a novel rate based allocation algorithm for VBR traffic and a cell control algorithm to determine the VBR flow conformance with the connection traffic parameters. Finally, an algorithm is proposed to integrate these algorithms to provide ubiquitous wireless ATM services. Performance, results show that the DR-TDMA MAC protocol can achieve high throughput in the range of 90 to 95% while maintaining reasonable QoS for all ATM services.
The post-common-envelope binary central star of the planetary nebula ETHOS 1
Creators: name: Munday, James
name: Jones, David
name: García-Rojas, Jorge
name: Boffin, Henri M. J.
name: Miszalski, Brent
name: Corradi, Romano L. M.
name: Rodríguez-Gil, Pablo
name: Rubio-Díez, María del Mar
name: Santander-García, Miguel
name: Sowicka, Paulina
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a detailed study of the binary central star of the planetary nebula ETHOS 1 (PN G068.1+11.0). Simultaneous modelling of light and radial velocity curves reveals the binary to comprise a hot and massive pre-white-dwarf with an M-type main-sequence companion. A good fit to the observations was found with a companion that follows expected mass-temperature-radius relationships for low-mass stars, indicating that despite being highly irradiated it is consistent with not being significantly hotter or larger than a typical star of the same mass. Previous modelling indicated that ETHOS 1 may comprise the first case where the orbital plane of the central binary does not lie perpendicular to the nebular symmetry axis, at odds with the expectation that the common envelope is ejected in the orbital plane. We find no evidence for such a discrepancy, deriving a binary inclination in agreement with that of the nebula as determined by spatio-kinematic modelling. This makes ETHOS 1 the ninth post-common-envelope planetary nebula in which the binary orbital and nebular symmetry axes have been shown to be aligned, with as yet no known counter-examples. The probability of finding such a correlation by chance is now less than 0.00002%.
description: 8 pages, 4 figures, accepted for publication in MNRAS
A discrete complex Ginzburg-Landau equation for a hydrodynamic active lattice
Creators: name: Thomson, Stuart J.
name: Durey, Matthew
name: Rosales, Rodolfo R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Dynamical Systems (math.DS)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A discrete and periodic complex Ginzburg-Landau equation, coupled to a discrete mean equation, is systematically derived from a driven and dissipative oscillator model, close to the onset of a supercritical Hopf bifurcation. The oscillator model is inspired by recent experiments exploring active vibrations of quasi-one-dimensional lattices of self-propelled millimetric droplets bouncing on a vertically vibrating fluid bath. Our systematic derivation provides a direct link between the constitutive properties of the lattice system and the coefficients of the resultant amplitude equations, paving the way to compare the emergent nonlinear dynamics---namely discrete bright and dark solitons, breathers, and traveling waves---against experiments. Further, the amplitude equations allow us to rationalize the successive bifurcations leading to these distinct dynamical states. The framework presented herein is expected to be applicable to a wider class of oscillators characterized by the presence of a dynamic coupling potential between particles. More broadly, our results point to deeper connections between nonlinear oscillators and the physics of active and driven matter.
description: 38 pages (1.5 spacing), 6 figures
Astrophysical properties of newly discovered Magellanic Cloud star clusters
Creators: name: Piatti, Andrés E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: New star cluster candidates projected toward the Large and Small Magellanic Clouds (L/SMC) have been recently discovered from relatively deep imaging surveys. We here conduct a sound analysis of 24 star cluster candidates located in the outer regions of the L/SMC using PSF photometry produced by the Survey of the Magellanic Stellar History. With only one exception, the studied objects resulted to be genuine stellar aggregates. We conclude on their physical reality once their observed color-magnitude diagrams (CMDs) were statistically decontaminated by the presence of field stars, and the resulting cleaned CMDs for stars with assigned membership probabilities higher than 50\% were compared with synthetic CMDs generated for thousand combinations of ages, distances, metallicities, star cluster mass and binary fractions. The parameter of the best-matched synthetic CMDs obtained from a likelihood approach were adopted as the star cluster astrophysical properties. The present star cluster sample spans a wide range of distances, from those star clusters located in front of the LMC, to those along the onset of the Magellanic Bridge, up to those behind the SMC. Their ages reveal different formation episodes that took place along the galaxy formation and others as a consequence of the galaxy interactions. From their estimated metallicities and ages, we speculate with the possibility that relatively metal-deficient gaseous flows have existed between these galaxies during nearly the last one Gyr (log(age /yr) $\approx$ 9.0), that made possible the formation of young star clusters in the galaxy peripheries. Despide the L/SMC interactions, the studied star clusters are similar or more massive than their counterparts in the Milky Way, which suggests that tidal effects are relatively more important in our Galaxy.
description: 7 figures, 8 pages. Accepted for publication in Astronomy & Astrophysics
Non-perturbative QED Model with Dressed States to Tackle HHG in Ultrashort Intense Laser Pulses
Creators: name: Hu, Huayu
name: Yuan, Jianmin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A generalization of non-perturbative QED model for high harmonic generation is developed for the multi-mode optical field case. By introducing classical-field-dressed quantized Volkov states analytically, a formula to calculate HHG for hydrogen-like atom in ultrashort intense laser pulse is obtained, which has a simple intuitive interpretation. The dressed state QED model indicates a new perspective to understand HHG, for example, the presence of the weak even-order harmonic photons, which has been verified by both theoretical analysis and numerical computation. Long wavelength approximation and strong field approximation are involved in the development of the formalism.
description: 4 pages, 2 figures
Agreement between the Rainbow Ranche Limited and Gerald Francis Lipsett, Muriel Martha Lipsett, and Martha Whiteley, April 17, 1953
Creators: name: Rainbow Ranche
Publisher: name: The University of British Columbia
Year: 2017

description: Agreement made between the Rainbow Ranche Limited and Gerald Francis Lipsett, Muriel Martha Lipsett, and Martha Whiteley, dated April 17, 1953.
O'ZBEKISTONNING TURKIY TILLI DAVLATLAR HAMKORLIK ITTIFOQIDAGI O'RNI
Creators: name: Mamatov, Behruz
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada O‘zbekistonning Turkiy davlatlar bilan hamdo‘stligi, iqtisodiy hamkorligi, geosiyosiy aloqalari haqida ilmiy fikrlar ilgari surilgan.
РЕТРОСПЕКТИВНЫЕ КЛИНИКО-ЛАБОРАТОРНЫЕ ПОКАЗАТЕЛИ ПАТОЛОГИИ ШЕЙКИ МАТКИ
Creators: name: Дехканова, Дилноза
Publisher: name: Zenodo
Year: 2024

description: В статье представлены результаты диагностического анализа женщин в ретроспективной группе фоновых и предраковых заболеваний шейки матки.
Elicitation of body part vocabulary
Creators: name: Parker, Verdena
name: Garrett, Andrew
name: George-Moore, Melodie
name: Golla, Victor
name: Jackson, Silis
name: Pycha, Anne
name: Willis, Becqui
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-170905-2: Elicitation of body part vocabulary. Recorded in a group setting with additional people present beyond the researchers identified here, some of whom participate in the conversation.
Transient dynamics of the quantum light retrieved from Rydberg polaritons
Creators: name: Padrón-Brito, Auxiliadora
name: Tricarico, Roberto
name: Farrera, Pau
name: Distante, Emanuele
name: Theophilo, Klara
name: Chang, Darrick
name: de Riedmatten, Hugues
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study the photon statistics of weak coherent pulses propagating through a cold Rydberg atomic ensemble in the regime of Rydberg electromagnetically induced transparency. We show experimentally that the value of the second-order autocorrelation function of the transmitted light strongly depends on the position within the pulse and heavily varies during the transients of the pulse. In particular, we show that the falling edge of the transmitted pulse displays much lower values than the rest of the pulse. We derive a theoretical model that quantitatively predicts our results and explains the physical behavior involved. Finally, we use this effect to generate single photons localized within a pulse from the atomic ensemble. We show that by selecting only the last part of the transmitted pulse, the single photons show an antibunching parameter as low as 0.12 and a generation efficiency per trial larger than possible with probabilistic generation schemes with atomic ensembles.
description: 21 pages, 11 figures
Markov partitions reflecting the geometry of x2,x3
Creators: name: Ward, Thomas
name: Yayama, Yuki
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37D20

description: We give an explicit geometric description of the $\times2,\times3$ system, and use his to study a uniform family of Markov partitions related to those of Wilson and Abramov. The behaviour of these partitions is stable across expansive cones and transitions in this behaviour detects the non-expansive lines.
description: 6 eps figures
Three open clusters containing Cepheids: NGC 6649, NGC 6664 and Berkeley 55
Creators: name: Alonso-Santiago, J.
name: Negueruela, I.
name: Marco, A.
name: Tabernero, H. M.
name: Castro, N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Classical Cepheids in open clusters play an important role in benchmarking stellar evolution models, anchoring the cosmic distance scale, and invariably securing the Hubble constant. NGC 6649, NGC 6664 and Berkeley 55 are three pertinent clusters that host classical Cepheids and red (super)giants, and an analysis was consequently initiated to assess newly acquired spectra ($\approx$50), archival photometry, and $Gaia$ DR2 data. Importantly, for the first time chemical abundances are determined for the evolved members of NGC 6649 and NGC 6664. We find that they are slightly metal-poor relative to the mean Galactic gradient, and an overabundance of Ba is observed. Those clusters likely belong to the thin disc, and the latter finding supports D'Orazi et al. (2009) "$s$-enhanced" scenario. NGC 6664 and Berkeley 55 exhibit radial velocities consistent with Galactic rotation, while NGC 6649 displays a peculiar velocity. The resulting age estimates for the clusters ($\approx$70 Ma) imply masses for the (super)giant demographic of $\approx$6 M$_{sun}$. Lastly, the observed yellow-to-red (super)giant ratio is lower than expected, and the overall differences relative to models reflect outstanding theoretical uncertainties.
description: 24 pages, 15 tables and 13 figures. Accepted for publication in A&A
Cohomology of the space of commuting n-tuples in a compact Lie group
Creators: name: Baird, Thomas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: Consider the space Hom(Z^n,G) of pairwise commuting n-tuples of elements in a compact Lie group G. This forms a real algebraic variety, which is generally singular. In this paper, we construct a desingularization of the generic component of Hom(Z^n,G), which allows us to derive formulas for its ordinary and equivariant cohomology in terms of the Lie algebra of a maximal torus in G and the action of the Weyl group. This is an application of a general theorem concerning G-spaces for which every element is fixed by a maximal torus.
description: 11 pages Changes made: Implemented referee recommendations, in particular to use the Vietoris mapping theorem to generalize results and simplify arguments
Matchmoving. Προσαρμογή πραγματικών εικόνων βίντεο με δημιουργημένες εικόνες τρισδιάστατων γραφικών:
Creators: name: Δρόσος, Γεώργιος Θεόδωρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Ιχνηλάτηση
Βαθμονόμηση
Φωτογραμμετρία
Παράλλαξη
Επίλυση κάμερας
Matchmoving
Tracking
Calibration
Photogrammetry
Parallax
Camera solving

description: Η παρούσα εργασία επικεντρώνεται στη μελέτη και την παρουσίαση της διαδικασίας matchmoving camera. Στα κεφάλαια της έρευνας που ακολουθούν, αρχικά γίνεται αναφορά στην ιστορία των οπτικών εφέ του κινηματογράφου με έμφαση στην εξέλιξη του matchmoving. Κατόπιν επιχειρείται η περιγραφή της διαδικασίας του Matchmoving με ανάλυση της μεθόδου που χρησιμοποιούν τα προγράμματα για να βρουν τα χαρακτηριστικά και την θέση της κάμερας στον τρισδιάστατο χώρο. Πιο αναλυτικά μελετάται: η φωτογραμμετρία (Photogrammetry), η δισδιάστατη ιχνηλάτηση (2D tracking) και η βαθμονόμηση (3D Calibration) ή επίλυση (Solving). Επιπλέον γίνεται αναφορά στον τρισδιάστατο χώρο του υπολογιστή και στα προγράμματα που υποδέχονται το συμπέρασμα - λύση για την θέση και το είδος της κάμερας. Διατυπώνονται προβληματισμοί σχετικά με τα προβλήματα που είναι πιθανόν να αντιμετωπίσει ο μηχανικός του matchmoving. Τέλος παρουσιάζεται η εφαρμογή ενός πειράματος με video, όπου εφαρμόζεται το matchmoving, ξεκινώντας από την σύλληψη των σκηνών, την επίλυση της θέσης της κάμερας, την μεταφορά της σε τρισδιάστατο πρόγραμμα μοντελοποίησης, την δημιουργία τρισδιάστατης γεωμετρίας, την σύνθεση των επιμέρους video και την προσθήκη ειδικών εφέ για την επίτευξη τελικού αποτελέσματος.
description: The present research's subject matter is the study and the presentation of matchmoving camera procedure. In the following chapters of this research, initially there is a thorough reference in the history of movie’s special effects with emphasis on the evolution of camera tracking. Afterwards, the matchmoving procedure is described from the aspect of the particular method which is used by specific software, in order to trace the characteristics and the placement of the camera in three dimensional space.Photogrammetry, 2D tracking, 3D Calibration and Solving are studied in detail. Moreover there is reference in computer 3D space environment and the software that hosts the conclusion-solution for the placement and the type of the camera. Further questions are formulated concerning the different problems that an engineer can encounter during the matchmoving procedure. In the last chapter a video experiment is produced where matchmoving procedure is applied, starting from scene capture, problem solving -referring to camera position, its transfer to the specific 3D modeling environment, creation of 3D geometry and finally the compositing of all the separate parts of the video with the addition of special effects in order to achieve the final output.
Phase transitions in GLSMs and defects
Creators: name: Brunner, Ilka
name: Klos, Fabian
name: Roggenkamp, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: In this paper, we construct defects (domain walls) that connect different phases of two-dimensional gauged linear sigma models (GLSMs), as well as defects that embed those phases into the GLSMs. Via their action on boundary conditions these defects give rise to functors between the D-brane categories, which respectively describe the transport of D-branes between different phases, and embed the D-brane categories of the phases into the category of D-branes of the GLSMs.
description: 43 pagees
Die deutschen Kirchen auf dem Weg zur Ökumenischen Dekade zur Überwindung von Gewalt
Creators: name: Dechow, Jens
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 49 Nr. 4 (2000): Ökumenische Rundschau, Band 49, Heft 4
Chirale elastische Metamaterialien: Grundlegende Mechanismen und deren Nutzung zur Strukturoptimierung
Creators: name: Ziemke, Patrick
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2022
Subjects: Finite Elemente
Chiralität
Mechanik
Elastizität
Metamaterial

description: Chirale Metamaterialien können reine Translationsbewegungen in Rotationen übersetzen. Wie stark diese Kopplung ist, wird über die chirale Antwort quantifiziert. Diese beschreibt, um welchen Winkel sich ein gerader prismatischer Stab verdreht, wenn er einer reinen Zug- oder Druckbelastung ausgesetzt wird. Das Blockiermoment beschreibt, welches Drehmoment benötigt wird, um die Verdrehung des Stabes zu verhindern. Für die kontinuumsmechanische Modellierung einer chiralen Antwort sind erweiterte Modelle wie zum Beispiel die mikropolare Kontinuumstheorie nötig. In der mikropolaren Elastizität existieren verschiedene charakteristische Längen, die es erlauben, größenabhängige Materialeigenschaften zu modellieren. Ist die Abmessung einer Probe um ein Vielfaches größer als die auf die Chiralität bezogene charakteristische Länge, verschwindet die chirale Antwort. Dabei nähert sie sich ihrem Grenzwert mit einem charakteristischen Abfall invers proportional zur Probengröße an. Im Rahmen dieser Arbeit konnte mit Finite-Elemente-Simulationen einer idealisierten Gitterstruktur unter Zugbelastung gezeigt werden, dass sich die charakteristische Länge über Größenordnungen hinweg einstellen lässt, wenn chirale Einheitszellen über nachgiebige achirale Verbindungselemente aneinander gekoppelt werden. Dabei wird die charakteristische Länge größer, wenn die Verbindungselemente nachgiebiger werden. Mit der charakteristischen Länge wird auch die chirale Antwort größer. Außerdem nehmen der Einfluss von geometrischen Nichtlinearitäten und die Sensitivität gegenüber Randbedingungen mit steigender charakteristischer Länge zu. Das an der idealisierten Gitterstruktur hergeleitete Designprinzip wurde genutzt, um ein mittels Zwei-Photonen-Stereolithographie herstellbares chirales Metamaterial zu entwerfen. Durch einen direkten Vergleich mit Experimenten an Gitterstrukturen aus mehr als 10⁵ Einheitszellen wurden die von den Finite-Elemente-Simulationen vorhergesagten Zusammenhänge validiert. Zuletzt wurden nicht-periodische chirale Strukturen betrachtet und es wurde gezeigt, dass diese insbesondere bezüglich des Blockiermoments vorteilhafte Eigenschaften gegenüber periodischen Strukturen aufweisen können.
Improving end-to-end performance of transmission control protocol (TCP) using link layer retransmissions over mobile internetworks
Creators: name: Wong, Jackson W. K.
Publisher: name: University of British Columbia
Year: 2009

description: TCP does not perform well in networks with high packet error rate like those with wireless links because TCP assumes network congestion to be the major cause for packet losses. Wireless losses make TCP unnecessarily initiate congestion control mechanism which results in poor performance in the form of low throughput and high interactive delay. The link layer scheme, which employs data link protocols in the base station and mobile host to retransmit lost packets over wireless link, may be employed to hide wireless losses from TCP, but the problem of competing retransmissions between TCP and link layer may occur, causing unnecessary duplications and significant degradation in TCP performance. This thesis investigates, through computer simulations, the end-to-end effects of link layer retransmissions over a low data-rate wireless link on TCP Reno. The results show that, by using the more effective selective-reject ARQ in the link layer, the problem of competitive retransmissions between TCP and link layer is much less serious than previously reported. It is also found that a non-sequencing link layer in combination with fragmentations of datagrams at the base station and mobile host can be employed without significantly degrading TCP performance, thus avoiding re-sequencing buffers and complex logic for handling out-of-sequence packets that would otherwise be needed for a sequencing link layer protocol. The link layer modifications for best-effort retransmissions, with a suitable division of the wireless-loss recovery function between TCP and link layer, are proposed to reduce the possible adverse effects of link layer resets and increased round trip time estimates from link layer recovery on TCP. The effects of link layer reliability, controlled by the maximum number of link layer retransmissions or the maximum link layer recovery time, on TCP throughput and round trip time estimations are studied.
Indenture between the Rainbow Ranche Limited and Gerald Francis and Muriel Martha Lipsett, July 24, 1953
Creators: name: Rainbow Ranche
Publisher: name: The University of British Columbia
Year: 2017

description: Indenture between the Rainbow Ranche Limited and Gerald Francis and Muriel Martha Lipsett, granted by the Rainbow Ranche Limited, dated July 24, 1953, for the deed of land for lot 10.
Scattering from layered seafloors: Comparisons between theory and integral equations
Creators: name: Olson, Derek R.
name: Jackson, Darrell
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Acoustic scattering from layered seafloors exhibits dependence on both the mean geoacoustic layering, as well as the roughness properties of each layer. Several theoretical treatments of this environment exist, including the small roughness perturbation approximation, the Kirchhoff approximation, and three different versions of the small slope approximation. All of these models give different results for the scattering cross section and coherent reflection coefficient, and there is currently no way to distinguish which model is the most correct. In this work, an integral equation for scattering from a layered seafloor with rough interfaces is presented, and compared with small roughness perturbation method, and two of the small slope approximations. It is found that the most recent small slope approximation by Jackson and Olson is the most accurate when the root mean square (rms) roughness is large, and some models are in close agreement with each other when the rms roughness is small.
description: 11 pages, 10 figures, submitted to the Journal of the Acoustical Society of America
IL-4 induced alternatively activated microglia enhances trophic factor IGF-1 production through PI3K signaling.
Creators: name: Gandhervin Kesavamoorthy
name: Hiromu  Furukawa
name: Ueki, Takatoshi
name: Sato, Kohji
Publisher: name: F1000 Research Limited
Year: 2019

description: Microglia, the immune cell in the central nervous system mount response in pathology. It is well believed that exacerbated microglial activation influence the neurodegenerative pathology. Reducing pro-inflammatory factors and directing cell based protective mechanisms exhibit neuroprotective effects. Enhanced trophic support from glial cells, particularly microglia support neuronal survival in addition to reducing inflammatory factors, phagocytosis and enhancing other survival cues. Among them IGF-1 and BDNF have been attractive molecules involved in development. Here we show microglial produce neurotropic factors IGF-1 and BDNF during alternative activations. Next we show that IGF-1 produced by IL-4R activation is mediated by PI3K and not by STAT6. These line of studies help understand the microglia biology to identify therapeutic strategies in the context to central nervous rather than the knowledge from the macrophage biology accepted in the peripheral immune system.
Μελέτη των NDP κινασών και Dnaσών στο πλάσμα του αίματος και στα αιμοπετάλια των νεογνών, υγιών ανθρώπων και ασθενών που υποφέρουν από αρτηριοσκλήρωση:
Creators: name: Rybak, Ievgeniia
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: NDP-κινάσες
Dnaσες
Αιμοπετάλια
Πλάσμα αίματος
Αρτηριοσκλήρωση
Νεογνά
Dnase
Platelets
Blood serum
Atherosclerosis
Neonates

description: Κινάσες των διφωσφονοθκλεοζιτών (ΝDP) (E.C.2.7.4.6.) και DNAσες μελετηθήκαν σε πλάσμα πλούσιο σε αιμοπετάλια (PRP) και σε φτωχό(PPP) ομάδων υγιών ενηλίκων ανθρώπων, βρεφών και ασθενών με αρτηριοσκλήρωση. Εφτά πεπτίδια (12-100 kDa) υφίστανται αυτοφωσφορυλίωση και παρουσιάζουν διαφορετική’ εξειδίκευση ως προς τους διφωσφονουκλεοζιτές (NDPs). Οι παραπάνω δραστικότητες εξαρτώνται απο την παρουσία μετάλλων δισθενών κατιόντων. Εν ο’τι αφορά της DNAσες, ανιχνεύθηκαν με ηλεκτροφόρηση σε ενεργής πηκτής, δυο ισόμορφες. Απο αυτές η μια δρα σε pH 6,0 παρουσία Zn2+ και η άλλη pH 7,5 παρουσία Ca2+. Στατιστική ανάλυση παρουσίασε σημαντικές διαφορές (p<0,01)στα επίπεδα της ενζυμικής δραστικότητες μεταξύ των ομάδων ανθρώπων που μελετήθηκαν.
description: NDP-(nucleoside diphosphate) – kinase (E.C. 2.7.4.6.) and DNAses were investigated in platelet reach plasma (PRP) and platelet poor plasma (PPP) of healthy adult people? Neonates and patients, suffering from atherosclerosis. Seven peptides (M.w. from 12 kDa to 100 kDa) undergo autophosphorylation and displayed different NDP-kinase specific activity towards NDPs. With regard to DNAses, two isoforms were detected after active gel analysis. One of them act at the pH 6,0 in the presence of Zn2+. And the next at pH 7,5 in the presence of Ca2+. Statistical analysis revealed certain significant differences (p<0,01) in enzyme activity among the groups of investigated people.
The Environments of Ultra-strong Mg II Absorbers
Creators: name: Nestor, Daniel B.
name: Turnshek, David A.
name: Rao, Sandhya M.
name: Quider, Anna M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present r'- or i'-band WIYN images of the fields of 15 Sloan Digital Sky Survey quasars that have spectra exhibiting intervening MgII absorption-line systems with rest equivalent widths 2.7A \le REW \le 6.0A and redshifts 0.42 < z_{abs} < 0.84. Such systems are rare and exhibit projected absorption velocity spreads in excess of \approx 300-650 km/s. Approximately 60% are expected to be damped Lyαsystems. In each of our fields we detect at least one galaxy that, if at the absorption redshift, would have impact parameter b \lesssim 40 kpc and luminosity L \gtrsim 0.3 L*. We measure a significant excess of galaxies at low-b to the sightlines over a large range of luminosity. Many of the sightlines are found to pass either through or close to the optically-luminous extent of a galaxy. Considering the very large velocity spreads seen in absorption, this suggests that these absorbing regions are more kinematically complex than local spirals such as the Milky Way. Our data indicate that interactions and galaxy pairs may be a contributing factor to the production of such large velocity spreads. Finally, we also find evidence that a population of galaxies with luminosities in the range 4L* \lesssim L \lesssim 13 L* may contribute to the presence of ultra-strong MgII absorption. Thus, some of the absorbing galaxies may represent a population intermediate to the very luminous high-redshift Lyman break galaxies and the fainter local starburst population.
description: 52 pages, 9 figures, accepted to ApJ For higher-res versions of images, see: http://www.ast.cam.ac.uk/~dbn/Images/
KVANT KOMPYUTERLARI TURLARI VA ULARNING ISON HAYOTIDAGI AHAMYATI
Creators: name: Tojimamatov, I. N.
name: Ro'zimatov, J. I.
Publisher: name: Zenodo
Year: 2024

description: Har doim rivojlanib borayotgan texnologiya landshaftida kvant kompyuterlari eng istiqbolli va inqilobiy yutuqlardan biri sifatida ajralib turadi. Ikkilik kodda (0 va 1s) ma'lumotni qayta ishlash uchun bitlarga tayanadigan klassik kompyuterlardan farqli o'laroq, kvant kompyuterlari kvant mexanikasi tamoyillaridan foydalanadi va kubitlar tushunchasini kiritadi. Hisoblashdagi bu fundamental siljish inson hayotining turli jabhalarini, ilmiy tadqiqotlardan tortib shifrlash va sun’iy intellektgacha o‘zgartirish imkoniyatiga ega.
ALMA Survey of Lupus Class III Stars: Early Planetesimal Belt Formation and Rapid Disk Dispersal
Creators: name: Lovell, J. B.
name: Wyatt, M. C.
name: Ansdell, M.
name: Kama, M.
name: Kennedy, G. M.
name: Manara, C. F.
name: Marino, S.
name: Matrà, L.
name: Rosotti, G.
name: Tazzari, M.
name: Testi, L.
name: Williams, J. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Class III stars are those in star forming regions without large non-photospheric infrared emission, suggesting recent dispersal of their protoplanetary disks. We observed 30 class III stars in the 1-3 Myr Lupus region with ALMA at ${\sim}856μ$m, resulting in 4 detections that we attribute to circumstellar dust. Inferred dust masses are $0.036{-}0.093M_\oplus$, ${\sim}1$ order of magnitude lower than any previous measurements; one disk is resolved with radius ${\sim}80$ au. Two class II sources in the field of view were also detected, and 11 other sources, consistent with sub-mm galaxy number counts. Stacking non-detections yields a marginal detection with mean dust mass ${\sim}0.0048M_\oplus$. We searched for gas emission from the CO J=3-2 line, and present its detection to NO Lup inferring a gas mass ($4.9 {\pm} 1.1$) ${\times}10^{-5} M_\oplus$ and gas-to-dust ratio $1.0{\pm}0.4$. Combining our survey with class II sources shows a gap in the disk mass distribution from $0.09{-}2M_\oplus$ for ${>}0.7M_\odot$ Lupus stars, evidence of rapid dispersal of mm-sized dust from protoplanetary disks. The class III disk mass distribution is consistent with a population model of planetesimal belts that go on to replenish the debris disks seen around main sequence stars. This suggests that planetesimal belt formation does not require long-lived protoplanetary disks, i.e., planetesimals form within ${\sim}$2 Myr. While all 4 class III disks are consistent with collisional replenishment, for two the gas and/or mid-IR emission could indicate primordial circumstellar material in the final stages of protoplanetary disk dispersal. Two class III stars without sub-mm detections exhibit hot emission that could arise from ongoing planet formation processes inside ${\sim}1$ au.
description: 30 pages, 20 figures. This is a pre-copyedited, author-produced PDF of an article accepted for publication in MNRAS following peer review
Το έγκλημα της κακουργηματικής πλαστογραφίας (Άρθρο 216 παρ.3 εδ.α΄ ΠΚ):
Creators: name: Ταμβάκης, Κωνσταντίνος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2009
Subjects: Κακουργηματική πλαστογραφία
Εγγραφο
Περιουσία
Felony forgery
Document
Property

description: Αντικείμενο μελέτης της παρούσας διπλωματικής εργασίας αποτελεί η διάταξη του άρθρου 216 παρ.3 εδ.α΄ ΠΚ περί κακουργηματικής πλαστογραφίας. Αρχικά, γίνεται προσπάθεια ανεύρεσης και προσδιορισμού του εννόμου αγαθού που προστατεύει η εν λόγω διάταξη. Εν συνεχεία, επιχειρείται μέσω μιας κριτικής επισκόπησης των θέσεων της νομολογίας η δογματική προσέγγιση ορισμένων ειδικότερων ζητημάτων που ανακύπτουν κατά την ερμηνεία και πρακτική εφαρμογή του εγκλήματος αυτού. Το τελευταίο μέρος της εργασίας αυτής αφιερώνεται στην επίλυση ορισμένων βασικών προβλημάτων συρροής του εγκλήματος της κακουργηματικής πλαστογραφίας, τα οποία απασχολούν έντονα μέχρι και σήμερα τη νομολογία των ποινικών μας δικαστηρίων.
description: This dissertation deals with the study of the provision of article 216 par.3 subparagraph a΄ of the Penal Code regarding felony forgery. Initially, an attempt is made to trace and define the legally accepted right, protected by the aforementioned provision. Furthermore, the assertive approach of certain special issues arising from the interpretation and practical application of this offence is attempted via the critical overview of case-law items. The final section of this dissertation is dedicated to the resolution of certain basic concurrent felony problems of the offence of felony forgery, which the case-law of our penal courts deals with to this day.
Hydrogel-based Bio-nanomachine Transmitters for Bacterial Molecular Communications
Creators: name: Martins, Daniel P.
name: -O'Reilly, Huong Q.
name: Coffey, Lee
name: Cotter, Paul D.
name: Balasubramaniam, Sasitharan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cell Behavior (q-bio.CB)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Bacterial quorum sensing can be engineered with a view to the design of biotechnological applications based on their intrinsic role as a means of communication. We propose the creation of a positive feedback loop that will promote the emission of a superfolded green fluorescence protein from a bacterial population that will flow through hydrogel, which is used to encapsulate the cells. These engineered cells are heretofore referred to as bio-nanomachine transmitters and we show that for lower values of diffusion coefficient, a higher molecular output signal power can be produced, which supports the use of engineered bacteria contained within hydrogels for molecular communications systems. In addition, our wet lab results show the propagation of the molecular output signal, proving the feasibility of engineering a positive feedback loop to create a bio-nanomachine transmitter that can be used for biosensing applications.
description: This work has been submitted to an ACM conference for possible publication
Elicitation of dance camp vocabulary
Creators: name: Parker, Verdena
name: Garrett, Andrew
name: George-Moore, Melodie
name: Golla, Victor
name: Jackson, Silis
name: Pycha, Anne
name: Willis, Becqui
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-170905-1: Elicitation of dance camp vocabulary. Recorded in a group setting with additional people present beyond the researchers identified here, some of whom participate in the conversation.
Loop model with mixed boundary conditions, qKZ equation and alternating sign matrices
Creators: name: Zinn-Justin, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The integrable loop model with mixed boundary conditions based on the 1-boundary extended Temperley--Lieb algebra with loop weight 1 is considered. The corresponding qKZ equation is introduced and its minimal degree solution described. As a result, the sum of the properly normalized components of the ground state in size L is computed and shown to be equal to the number of Horizontally and Vertically Symmetric Alternating Sign Matrices of size 2L+3. A refined counting is also considered.
Validation of Coronal Mass Ejection Arrival-Time Forecasts by Magnetohydrodynamic Simulations based on Interplanetary Scintillation Observations
Creators: name: Iwai, Kazumasa
name: Shiota, Daikou
name: Tokumaru, Munetoshi
name: Fujiki, Kenichi
name: Den, Mitsue
name: Kubo, Yûki
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Coronal mass ejections (CMEs) cause various disturbances of the space environment; therefore, forecasting their arrival time is very important. However, forecasting accuracy is hindered by limited CME observations in interplanetary space. This study investigates the accuracy of CME arrival times at the Earth forecasted by three-dimensional (3D) magnetohydrodynamic (MHD) simulations based on interplanetary scintillation (IPS) observations. In this system, CMEs are approximated as spheromaks with various initial speeds. Ten MHD simulations with different CME initial speed are tested, and the density distributions derived from each simulation run are compared with IPS data observed by the Institute for Space-Earth Environmental Research (ISEE), Nagoya University. The CME arrival time of the simulation run that most closely agrees with the IPS data is selected as the forecasted time. We then validate the accuracy of this forecast using 12 halo CME events. The average absolute arrival-time error of the IPS-based MHD forecast is approximately 5.0 h, which is one of the most accurate predictions that ever been validated, whereas that of MHD simulations without IPS data, in which the initial CME speed is derived from white-light coronagraph images, is approximately 6.7 h. This suggests that the assimilation of IPS data into MHD simulations can improve the accuracy of CME arrival-time forecasts. The average predicted arrival times are earlier than the actual arrival times. These early predictions may be due to overestimation of the magnetic field included in the spheromak and/or underestimation of the drag force from the background solar wind, the latter of which could be related to underestimation of CME size or background solar wind density.
description: 17 pages, 4 figures, and 1 table, accepted for publication in Earth, Planets and Space
Observation of ultra-slow shock waves in a tunable magnetic lattice
Creators: name: Li, Jian
name: Senthilnathan, Chockalingam
name: Cohen, Tal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The combination of fast propagation speeds and highly localized nature has hindered the direct observation of the evolution of shock waves at the molecular scale. To address this limitation, an experimental system is designed by tuning a one-dimensional magnetic lattice to evolve benign wave forms into shock waves at observable spatial and temporal scales, thus serving as a 'magnifying glass' to illuminate shock processes. An accompanying analysis confirms that the formation of strong shocks is fully captured. The exhibited lack of a steady state induced by indefinite expansion of a disordered transition zone points to the absence of local thermodynamic equilibrium, and resurfaces lingering questions on the validity of continuum assumptions in presence of strong shocks.