cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The role of Cav1.4 calcium channel in T cell activation, proliferation, effector functions and death
Creators: name: Wang, Teresa Yi Wen
Publisher: name: University of British Columbia
Year: 2011

description: T lymphocytes are an important part of the immune system that identify and destroy foreign antigens in the body as well as activate and deactivate other immune cells. In T lymphocytes, calcium is a secondary messenger that regulates activation and proliferation, effector function, survival and death. Although calcium release from the intracellular stores within T lymphocytes is well characterized, the calcium entry pathway from extracellular sources into T lymphocytes is unclear, despite contributing to the majority of elevated intracellular calcium ions during T lymphocyte activation. Preliminary studies have shown that L-type calcium channels play significant roles in the calcium influx pathways, mediating T lymphocyte activation and proliferation in vitro. Cav1.4 L-type calcium channel has been found to be expressed in both mouse and human T lymphocytes. To date, three Cav1.4 calcium channel splice variants have been identified with differential expression throughout the T lymphocyte proliferation process. I hypothesized that pore forming subunit of a L-type calcium channel, Cav1.4, regulates T lymphocyte activation and proliferation in vivo. To test this hypothesis, I used loss of function L-type calcium channel knock-out (KO) mice lacking the entire gene coding for this calcium channel and its splice variants to study its effects on T cell activation, proliferation, death, calcium uptake, and effector responses. From these studies, I predict that the lack of L-type calcium channels will cause T lymphocyte activation, proliferation and development to be impaired. These studies shed light on the mechanism of T lymphocyte activation and also enabled us to better understand how antagonistic drugs such as nifedipine may cause immunosuppressive effects.
Spin and charge transport induced by gauge fields in a ferromagnet
Creators: name: Shibata, Junya
name: Kohno, Hiroshi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present a microscopic theory of spin-dependent motive force ("spin motive force") induced by magnetization dynamics in a conducting ferromagnet, by taking account of spin relaxation of conduction electrons. The theory is developed by calculating spin and charge transport driven by two kinds of gauge fields; one is the ordinary electromagnetic field $A^{\rm em}_μ$, and the other is the effective gauge field $A^{z}_μ$ induced by dynamical magnetic texture. The latter acts in the spin channel and gives rise to a spin motive force. It is found that the current induced as a linear response to $A^{z}_μ$ is not gauge-invariant in the presence of spin-flip processes. This fact is intimately related to the non-conservation of spin via Onsager reciprocity, so is robust, but indicates a theoretical inconsistency. This problem is resolved by considering the time dependence of spin-relaxation source terms in the "rotated frame", as in the previous study on Gilbert damping [J. Phys. Soc. Jpn. {\bf 76}, 063710 (2007)]. This effect restores the gauge invariance while keeping spin non-conservation. It also gives a dissipative spin motive force expected as a reciprocal to the dissipative spin torque ("$β$-term").
description: 13 pages, 3 figures, submitted to PRB
Rotons in interacting ultracold Bose gases
Creators: name: Cormack, Samuel C.
name: Schumayer, Dániel
name: Hutchinson, David A. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In three dimensions, non-interacting bosons undergo Bose-Einstein condensation at a critical temperature, $T_{c}$, which is slightly shifted by $ΔT_{\mathrm{c}}$, if the particles interact. We calculate the excitation spectrum of interacting Bose-systems, \sup{4}He and \sup{87}Rb, and show that a roton minimum emerges in the spectrum above a threshold value of the gas parameter. We provide a general theoretical argument for why the roton minimum and the maximal upward critical temperature shift are related. We also suggest two experimental avenues to observe rotons in condensates. These results, based upon a Path-Integral Monte-Carlo approach, provide a microscopic explanation of the shift in the critical temperature and also show that a roton minimum does emerge in the excitation spectrum of particles with a structureless, short-range, two-body interaction.
description: 5 pages, 6 figures
Sub-millimeter brightness of early star-forming galaxies
Creators: name: Yajima, Hidenobu
name: Umemura, Masayuki
name: Mori, Masao
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Based on a three-dimensional model of an early star-forming galaxy, we explore the evolution of the sub-millimeter brightness. The model galaxy is employed from an ultra-high-resolution chemodynamic simulation of a primordial galaxy by Mori & Umemura, where the SFR is ~ 10 Msun/yr at t<0.3 Gyr and several Msun/yr at t>0.3 Gyr. The former phase well reproduces the observed properties of LAEs and the latter does LBGs. We solve the three-dimensional radiative transfer in the clumpy interstellar media in this model galaxy, taking the size distributions of dust grains into account, and calculate the dust temperature as a function of galactic evolutionary time. We find that the clumpiness of interstellar media plays an important role for the sub-millimeter brightness. In the LAE phase, dust grains are concentrated on clumpy star-forming regions that are distributed all over the galaxy, and the grains can effectively absorb UV radiation from stars. As a result, the dust is heated up to T>35 K. In the LBG phase, the continuous supernovae drive dust grains far away from star-forming regions. Then, the grains cannot absorb much radiation from stars, and becomes into a cold state close to the CMB temperature. Consequently, the dust temperature decreases with the evolutionary time, where the mass-weighted mean temperature is T=26 K at t=0.1 Gyr and T=21 K at t=1.0 Gyr. By this analysis, it turns out that the sub-millimeter brightness is higher in the LAE phase than that in the LBG phase, although the dust-to-gas ratio increases monotonically as a function of time. We derive the spectral energy distributions by placing the model galaxy at a given redshift. The peak flux at 850 micron is found to be S_850 ~ 0.2 - 0.9 mJy if the model galaxy is placed at 6>z>2. This means that ALMA can detect an early star-forming galaxy with SFR of ~ 10 Msun/yr by less than one hour integration with 16 antennas.
description: 9 pages, 9 figures, accepted for publication in MNRAS
Inside the Israeli Innovation System: its origins, development and evolution
Creators: name: Fischer, Alice
Publisher: name: Arts
Year: 2018
Subjects: subject: innovation
subject: Technology
subject: National Innovation Systems
subject: Israeli Innovation System
subject: Israeli innovation
subject: Systems of Innovation Theory
subject: Israel
subject: Israeli technology
subject: Israeli R&D
subject: Israeli transfer of technology
subject: Education--Business
subject: Education--Industrial
subject: Education--Sciences
subject: Education--Technology
subject: Economics--Theory
subject: History--Modern
subject: Engineering--Environmental

description: This dissertation examines the origins and evolution of the Israeli Innovation System, which propelled the development of the country’s economy, focusing on how it is responding to the new challenges of green energy. The research is interdisciplinary, involving documentary historical and policy research, in-depth interviewing, and analysis within the Systems of Innovation theoretical framework. The findings indicate that the main reasons for the successes of the system have been the commitment of government through policies and programs; the technological developments by elite military units; a military and business culture that embraces risk and entrepreneurship; the role of its universities in applied R&D; and the Russian Jewish immigration that brought a wealth of human capital. The findings also show that although the Israeli Innovation System has been very successful for the last 20 years, ‘innovation’ in the system itself is now required if its success is to continue. The main weaknesses of the Israeli innovation system include its narrow focus on research and development (R&D), and the practice of exporting new technologies instead of developing them into domestic industries. The conclusion is that culture and public policy are equally important in technology transfer and innovation, possibly making it difficult for other countries to copy the Israeli Innovation System.
The Interfaces of a Virtual National Collection
Creators: name: Paltrinieri, Carlotta
name: Briggs, Jo
name: Ogden, Bernard
name: Angelova, Lora
name: Rees, Gethin
name: Miller, Grant
name: Blickhan, Samantha
Publisher: name: Zenodo
Year: 2021

description: This panel includes papers by the representatives of three Foundation Projects funded through the Towards a National Collection program: Deep Discoveries; Locating a National Collection, and Engaging Crowds. Each project is developing a proof of concept user interface that aims at engaging different audiences (from experts to casual users) at different levels of agency (from participatory methods to serendipitous discovery) - setting an example for organisations dealing with similar digital collections and technologies.
The $A(K^-_{stop},π^\pmΣ^\mp)A'$ reaction on p-shell nuclei
Creators: name: FINUDA Collaboration
name: Agnello, M.
name: Benussi, L.
name: Bertani, M.
name: Bhang, H. C.
name: Bonomi, G.
name: Botta, E.
name: Bregant, M.
name: Bressani, T.
name: Bufalino, S.
name: Busso, L.
name: Calvo, D.
name: Camerini, P.
name: Dalena, B.
name: DeMori, F.
name: D'Erasmo, G.
name: Fabbri, F. L.
name: Feliciello, A.
name: Filippi, A.
name: Fiore, E. M.
name: Fontana, A.
name: Fujioka, H.
name: Genova, P.
name: Gianotti, P.
name: Grion, N.
name: Lucherini, V.
name: Marcello, S.
name: Mirfakhrai, N.
name: Moia, F.
name: Montagna, P.
name: Morra, O.
name: Nagae, T.
name: Outa, H.
name: Pantaleo, A.
name: Paticchio, V.
name: Piano, S.
name: Rui, R.
name: Simonetti, G.
name: Wheadon, R.
name: Zenoni, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: This letter is concerned with the study of the $K^-_{stop}A\rightarrow π^\pmΣ^\mp A'$ reaction in p-shell nuclei, i.e., $^{6,7}Li$, $^9Be$, $^{13}C$ and $^{16}O$. The $π^\pmΣ^\mp / K^-_{stop}$ emission rates are reported as a function of $A$. These rates are discussed in comparison with previous findings. The ratio $π^-Σ^+/π^+Σ^-$ in p-shell nuclei is found to depart largely from that on hydrogen, which provides support for large in-medium effects possibly generated by the sub-threshold $Λ(1405)$. The continuum momentum spectra of prompt pions and free sigmas are also discussed as well as the $π^\pmΣ^\mp$ missing mass behavior and the link with the reaction mechanism. The apparatus used for the investigation is the FINUDA spectrometer operating at the DA$Φ$NE $ϕ$-factory (LNF-INFN, Italy).
description: 14 pages, 5 figures, accepted for publication in Phys. Lett. B
Angular momentum transport through magnetic accretion curtains inside disrupted discs
Creators: name: Campbell, C. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The structure of accretion curtain flows arising from magnetically disrupted discs is considered. It is shown that a sub-Alfvenic, magnetically channelled flow is consistent with matching the magnetic field across the curtain base. It is shown that some angular momentum is necessarily fed back into the disc, and this reduces the accretion torque acting on the star. The sonic point coordinates are found and a critical rotation rate results below which the sonic point merges with the curtain flow base so, for such stellar rotation rates, little or no thermal assistance is required for material to make the transition to a supersonic flow.
description: 12 pages, 1 figure, accepted for MNRAS
The Perfect Local $ Tb$ Theorem and Twisted Martingale Transforms
Creators: name: Lacey, Michael T.
name: Vähäkangas, Antti V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics

description: A local Tb Theorem provides a flexible framework for proving the boundedness of a Calderón-Zygmund operator T. One needs only boundedness of the operator T on systems of locally pseudo-accretive functions \{b_Q\}, indexed by cubes. We give a new proof of this Theorem in the setting of perfect (dyadic) models of Calderón-Zygmund operators, imposing integrability conditions on the b_Q functions that are the weakest possible. The proof is a simple direct argument, based upon a new inequality for transforms of so-called twisted martingale differences.
description: 12 pages v2: typos corrected in section 5 v3: The twisted martingale transform inequalities appeared in Auscher Routin (arXiv:1011.1747), which is now reflected in the text
Temperature dependence of geometrical and velocity matching resonances in Bi2Sr2CaCu2O8+x intrinsic Josephson junctions
Creators: name: Katterwe, S. O.
name: Krasnov, V. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study temperature dependence of geometrical (Fiske) and velocity-matching (Eck) resonances in the flux flow state of small Bi2Sr2CaCu2O8+x mesa structures. It is shown that the quality factor of resonances is high at low T, but rapidly decreases with increasing temperature already at T > 10 K. We also study T-dependencies of resonant voltages and the speed of electromagnetic waves (the Swihart velocity). Surprisingly it is observed that the Swihart velocity exhibits a flat T-dependence at low T, following T-dependence of the c-axis critical current, rather than the expected linear T-dependence of the London penetration depth. Our data indicate that self-heating is detrimental for operation of mesas as coherent THz oscillators because it limits the emission power via suppression of the quality factor. On the other hand, significant temperature dependence of the Swihart velocity allows broad-range tunability of the output frequency.
description: 9 pages, 5 figures
Hamiltonian tomography of dissipative systems under limited access: A biomimetic case study
Creators: name: Maruyama, Koji
name: Burgarth, Daniel
name: Ishizaki, Akihito
name: Whaley, K. Birgitta
name: Takui, Takeji
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The identification of parameters in the Hamiltonian that describes complex many-body quantum systems is generally a very hard task. Recent attention has focused on such problems of Hamiltonian tomography for networks constructed with two-level systems. For open quantum systems, the fact that injected signals are likely to decay before they accumulate sufficient information for parameter estimation poses additional challenges. In this paper, we consider use of the gateway approach to Hamiltonian tomography \cite{Burgarth2009,Burgarth2009a} to complex quantum systems with a limited set of state preparation and measurement probes. We classify graph properties of networks for which the Hamiltonian may be estimated under equivalent conditions on state preparation and measurement. We then examine the extent to which the gateway approach may be applied to estimation of Hamiltonian parameters for network graphs with non-trivial topologies mimicking biomolecular systems.
description: 6 pages
Massive Cosmologies
Creators: name: D'Amico, G.
name: de Rham, C.
name: Dubovsky, S.
name: Gabadadze, G.
name: Pirtskhalava, D.
name: Tolley, A. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We explore the cosmological solutions of a recently proposed extension of General Relativity with a Lorentz-invariant mass term. We show that the same constraint that removes the Boulware-Deser ghost in this theory also prohibits the existence of homogeneous and isotropic cosmological solutions. Nevertheless, within domains of the size of inverse graviton mass we find approximately homogeneous and isotropic solutions that can well describe the past and present of the Universe. At energy densities above a certain crossover value, these solutions approximate the standard FRW evolution with great accuracy. As the Universe evolves and density drops below the crossover value the inhomogeneities become more and more pronounced. In the low density regime each domain of the size of the inverse graviton mass has essentially non-FRW cosmology. This scenario imposes an upper bound on the graviton mass, which we roughly estimate to be an order of magnitude below the present-day value of the Hubble parameter. The bound becomes especially restrictive if one utilizes an exact self-accelerated solution that this theory offers. Although the above are robust predictions of massive gravity with an explicit mass term, we point out that if the mass parameter emerges from some additional scalar field condensation, the constraint no longer forbids the homogeneous and isotropic cosmologies. In the latter case, there will exist an extra light scalar field at cosmological scales, which is screened by the Vainshtein mechanism at shorter distances.
description: 21 pages
Investigating the binding interaction between granulocyte-macrophage colony-stimulating factor and the soluble alpha subunit of its receptor through hydrogen deuterium exchange mass spectrometry
Creators: name: Vande Graaf, Jaclyn Louise
Publisher: name: University of Calgary
Year: 2006

description: Bibliography: p. 89-92
description: Some pages are in colour.
description: A copy of the thesis on CD-Rom is included.
Hypergroups and Hypergroup Algebras
Creators: name: Litvinov, Grigory L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Representation Theory (math.RT)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 43A62, 46H15, 43A45, 43A65

description: The survey contains a brief description of the ideas, constructions, results, and prospects of the theory of hypergroups and generalized translation operators. Representations of hypergroups are considered, being treated as continuous representations of topological hypergroup algebras.
description: 52 pages
Testing for a generalized Pareto process
Creators: name: Aulbach, Stefan
name: Falk, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 62F05 (Primary) 60G70, 62G32 (Secondary)

description: We investigate two models for the following setup: We consider a stochastic process X \in C[0,1] whose distribution belongs to a parametric family indexed by \vartheta \in Θ \subset R. In case \vartheta = 0, X is a generalized Pareto process. Based on n independent copies X(1),...,X(n) of X, we establish local asymptotic normality (LAN) of the point process of exceedances among X(1),...,X(n) above an increasing threshold line in each model. The corresponding central sequences provide asymptotically optimal sequences of tests for testing H0 : \vartheta = 0 against a sequence of alternatives Hn : \vartheta = \varthetan converging to zero as n increases. In one model, with an underlying exponential family, the central sequence is provided by the number of exceedances only, whereas in the other one the exceedances themselves contribute, too. However it turns out that, in both cases, the test statistics also depend on some additional and usually unknown model parameters. We, therefore, consider an omnibus test statistic sequence as well and compute its asymptotic relative efficiency with respect to the optimal test sequence.
description: 22 pages, 1 figure, 4th International Conference of the ERCIM WG on Computing & Statistics (ERCIM'11), 17-19 December, 2011, University of London
Adversarial Scene Editing: Automatic Object Removal from Weak Supervision
Creators: name: Shetty, Rakshith
name: Fritz, Mario
name: Schiele, Bernt
Publisher: name: CISPA
Year: 2023

description: While great progress has been made recently in automatic image manipulation, it has been limited to object centric images like faces or structured scene datasets. In this work, we take a step towards general scene-level image editing by developing an automatic interaction-free object removal model. Our model learns to find and remove objects from general scene images using image-level labels and unpaired data in a generative adversarial network (GAN) framework. We achieve this with two key contributions: a two-stage editor architecture consisting of a mask generator and image in-painter that co-operate to remove objects, and a novel GAN based prior for the mask generator that allows us to flexibly incorporate knowledge about object shapes. We experimentally show on two datasets that our method effectively removes a wide variety of objects using weak supervision only.
Two-Message Statistically Sender-Private OT from LWE
Creators: name: Brakerski, Zvika
name: Döttling, Nico
Publisher: name: CISPA
Year: 2023

description: : We construct a two-message oblivious transfer (OT) protocol without setup that guarantees statistical privacy for the sender even against malicious receivers. Receiver privacy is game based and relies on the hardness of learning with errors (LWE). This flavor of OT has been a central building block for minimizing the round complexity of witness indistinguishable and zero knowledge proof systems and multi-party computation protocols, as well as for achieving circuit privacy for homomorphic encryption in the malicious setting. Prior to this work, all candidates in the literature from standard assumptions relied on number theoretic assumptions and were thus insecure in the post-quantum setting. This work provides the first (presumed) post-quantum secure candidate and thus allows to instantiate the aforementioned applications in a post-quantum secure manner. Technically, we rely on the transference principle: Either a lattice or its dual must have short vectors. Short vectors, in turn, can be translated to information loss in encryption. Thus encrypting one message with respect to the lattice and one with respect to its dual guarantees that at least one of them will be statistically hidden.
Physical Activity, Adiposity, and Functional Measures in Youth with Juvenile Idiopathic Arthritis Compared to Healthy Controls
Creators: name: Nesbitt, Colleen
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: juvenile idiopathic arthritis
subject: JIA
subject: physical activity
subject: ActiGraph
subject: accelerometer
subject: adiposity
subject: balance
subject: aerobic capacity
subject: fitness
subject: Education--Sciences
subject: Rehabilitation and Therapy

description: Objective: To examine habitual physical activity, aerobic capacity, adiposity, and dynamic balance skills in children with JIA, inclusive of knee involvement, compared to age and sex matched healthy controls. Design: Cohort study with a matched-pair design Participants: Twenty-five youth with JIA, ages 10-20, (16 female, 9 male) were matched by age and sex to 25 healthy control participants. Methods: Physical activity data was collected using an ActiGraph accelerometer for 7 days. Aerobic capacity (relative VO2peak) was assessed by a maximal bike test. Adiposity (fat mass index) was evaluated by dual energy X-ray absorptiometry (DXA). Three dynamic balance tests examined balance performance. Results: No significant difference between groups was found in any of the outcomes after adjusting for multiple comparisons. Conclusions: Youth with JIA have similar physical activity, aerobic fitness, adiposity, and functional balance ability as their healthy peers. Differences found in physical activity between male groups could have clinical significance.
Spin and holographic metals
Creators: name: Alexandrov, Victor
name: Coleman, Piers
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we discuss two-dimensional holographic metals from a condensed matter physics perspective. We examine the spin structure of the Green's function of the holographic metal, demonstrating that the excitations of the holographic metal are "chiral", lacking the inversion symmetry of a conventional Fermi surface, with only one spin orientation for each point on the Fermi surface, aligned parallel to the momentum. While the presence of a Kramer's degeneracy across the Fermi surface permits the formation of a singlet superconductor, it also implies that ferromagnetic spin fluctuations are absent from the holographic metal, leading to a complete absence of Pauli paramgnetism. In addition, we show how the Green's function of the holographic metal can be regarded as a reflection coefficient in anti-de-Sitter space, relating the ingoing and outgoing waves created by a particle moving on the external surface.
description: 11 pages, 6 figures. Note added
Dynamics of magnetic moments coupled to electrons and lattice oscillations
Creators: name: Mera, B.
name: Vieira, V. R.
name: Dugaev, V. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Inspired by the models of A. Rebei and G. J. Parker and A. Rebei et. al., we study a physical model which describes the behaviour of magnetic moments in a ferromagnet. The magnetic moments are associated to 3d electrons which interact with conduction band electrons and with phonons. We study each interaction separately and then collect the results assuming that the electron-phonon interaction can be neglected. For the case of the spin-phonon interaction, we study the derivation of the equations of motion for the classical spin vector and find that the correct behaviour, as given by the Brown equation for the spin vector and the Bloch equation, using the results obtained by D. A. Garanin for the average over fluctuations of the spin vector, can be obtained in the high temperature limit. At finite temperatures we show that the Markovian approximation for the fluctuations is not correct for time scales below some thermal correlation time $τ_{Th}$. For the case of electrons we workout a perturbative expansion of the Feynman-Vernon functional. We find the expression for the random field correlation function. The composite model (as well as the individual models) is shown to satisfy a fluctuation-dissipation theorem for all temperature regimes if the behaviour of the coupling constants of the phonon-spin interaction remains unchanged with the temperature. The equations of motion are derived.
Guiding app testing with mined interaction models
Creators: name: Jr., Nataniel Pereira Borges
name: Gómez, Maria
name: Zeller, Andreas
Publisher: name: CISPA
Year: 2023

description: Test generators for graphical user interfaces must constantly choose which UI element to interact with, and how. We guide this choice by mining associations between UI elements and their interactions from the most common applications. Once mined, the resulting UI interaction model can be easily applied to new apps and new test generators. In our experiments, the mined interaction models lead to code coverage improvements of 19.41% and 43.03% on average on two state-of-the-art tools (DROIDMATE and DROIDBOT), when executing the same number of actions.
Quantum Dynamics of Low-Energy Theory on Semilocal Non-Abelian Strings
Creators: name: Koroteev, Peter
name: Shifman, Mikhail
name: Vinci, Walter
name: Yung, Alexei
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently a low-energy effective theory on non-Abelian semilocal vortices in SQCD with the U(N) gauge group and N + \tilde{N} quark flavors was obtained in field theory arXiv:1104.2077. The result is exact in a certain limit of large infrared cut-off. The resulting model was called the zn model. We study quantum dynamics of the zn model in some detail. First we solve it at large N in the leading order. Then we compare our results with those of Hanany and Tong hep-th/0403158 (the HT model) who based their derivation on a certain type-IIA formalism, rather than on a field-theory construction. In the 't Hooft limit of infinite N both model's predictions are identical. At finite N our calculations agree with the Hanany-Tong results only in the BPS sector. Beyond the BPS sector there is no agreement between the zn and HT models. Finally, we study perturbation theory of the zn model from various standpoints.
description: 41 pages, 5 figures, typos corrected
Brechende Wellen, gebrochene Sprache. Die Natur in der Lyrik Jean Kriers
Creators: name: Ritte, Jürgen
Publisher: name: Trier University
Year: 2021

description: Despite its predominantly maritime subjects, the work of the German-speaking Luxembourgish poet Jean Krier presents itself from its debut (“Breton Islands,” 1994) as a deconstruction of classical nature poetry. Jean Krier’s poems thus stand in a tradition that goes back to Schiller and extends to the aesthetic theory of Theodor W. Adorno in ratifying the state of man’s separation from nature. Krier’s aesthetic procedure is based on the deconstruction of linguistic material that is subjected to states of play (mots-valises, homophonies, polyphonies, word lists, etc.). His poetry thus becomes a modern form of literary criticism in which disparate flotsam and junk-language reflect each other.
Drunk sincerity : a young adult novel
Creators: name: Freilich, Molly Alyssa
Publisher: name: University of British Columbia
Year: 2012

description: In many young adult novels, teens are portrayed as whiny eye-rollers who seem incapable of taking control of the situations in which they find themselves. In Drunk Sincerity, this is not the case for 15-year-old protagonist Alyssa. Set in Los Angeles, the novel chronicles Alyssa's journey into sobriety, where her sometimes painful, sometimes funny coming of age tale begins. This work is influenced by young adult texts like Rule of the Bone by Russell Banks and The Perks of Being a Wallflower by Stephen Chbosky, as well as Frielich's own journals from childhood.
Charged States and Band-Gap Narrowing in Codoped ZnO Nanowires for Enhanced Photoelectrochemical Responses
Creators: name: Xu, Zhuo
name: Zheng, Qing-Rong
name: Su, Gang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: By means of first-principles calculations within the density functional theory, we study the structural and optical properties of codoped ZnO nanowires and compare them with those of the bulk and film. It is disclosed that the low negatively charged ground states of nitrogen related defects play a key role in the optical absorption spectrum tail that narrows the band-gap and enhances the photoelectrochemical response significantly. A strategy of uncompensated N, P and Ga codoping in ZnO nanowires is proposed to produce a red-shift of the optical absorption spectra further than the exclusive N doping and to get a proper formation energy with a high defect concentration and a suppressed recombination rate. In this way, the absorption of the visible light can be improved and the photocurrent can be raised. These observations are consistent with the existing experiments, which will be helpful to improve the photoelectrochemical responses for the wide-band-gap semiconductors especially in water splitting applications.
description: 10 pages, 7 figures
Parameterized Synthesis of Self-Stabilizing Protocols in Symmetric Rings
Creators: name: Mirzaie, Nahal
name: Faghih, Fathiyeh
name: Jacobs, Swen
name: Bonakdarpour, Borzoo
Publisher: name: CISPA
Year: 2023

description: Self-stabilization in distributed systems is a technique to guarantee convergence to a set of legitimate states without external intervention when a transient fault or bad initialization occurs. Recently, there has been a surge of efforts in designing techniques for automated synthesis of self-stabilizing algorithms that are correct by construction. Most of these techniques, however, are not parameterized, meaning that they can only synthesize a solution for a fixed and predetermined number of processes. In this paper, we report a breakthrough in parameterized synthesis of self-stabilizing algorithms in symmetric rings. First, we develop tight cutoffs that guarantee (1) closure in legitimate states, and (2) deadlock-freedom outside the legitimates states. We also develop a sufficient condition for convergence in silent self-stabilizing systems. Since some of our cutoffs grow with the size of local state space of processes, we also present an automated technique that significantly increases the scalability of synthesis in symmetric networks. Our technique is based on SMT-solving and incorporates a loop of synthesis and verification guided by counterexamples. We have fully implemented our technique and successfully synthesized solutions to maximal matching, three coloring, and maximal independent set problems.
Obfuscation from Low Noise Multilinear Maps
Creators: name: Döttling, Nico
name: Garg, Sanjam
name: Gupta, Divya
name: Miao, Peihan
name: Mukherjee, Pratyay
Publisher: name: CISPA
Year: 2023

description: Multilinear maps enable homomorphic computation on encoded values and a public procedure to check if the computation on the encoded values results in a zero. Encodings in known candidate constructions of multilinear maps have a (growing) noise component, which is crucial for security. For example, noise in GGH13 multilinear maps grows with the number of levels that need to be supported and must remain below the maximal noise supported by the multilinear map for correctness. A smaller maximal noise, which must be supported, is desirable both for reasons of security and efficiency. In this work, we put forward new candidate constructions of obfuscation for which the maximal supported noise is polynomial (in the security parameter). Our constructions are obtained by instantiating a modification of Lin’s obfuscation construction (EUROCRYPT 2016) with composite order variants of the GGH13 multilinear maps. For these schemes, we show that the maximal supported noise only needs to grow polynomially in the security parameter. We prove the security of these constructions in the weak multilinear map model that captures all known vulnerabilities of GGH13 maps. Finally, we investigate the security of the considered composite order variants of GGH13 multilinear maps from a cryptanalytic standpoint.
Underflight calibration of SOHO/CDS and Hinode/EIS with EUNIS-07
Creators: name: Wang, Tongjiang
name: Thomas, Roger J.
name: Brosius, Jeffrey W.
name: Young, Peter R.
name: Rabin, Douglas M.
name: Davila, Joseph M.
name: Del Zanna, Giulio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Flights of Goddard Space Flight Center's Extreme-Ultraviolet Normal-Incidence Spectrograph (EUNIS) sounding rocket in 2006 and 2007 provided updated radiometric calibrations for SOHO/CDS and Hinode/EIS. EUNIS carried two independent imaging spectrographs covering wavebands of 300-370 A in first order and 170-205 A in second order. After each flight, end-to-end radiometric calibrations of the rocket payload were carried out in the same facility used for pre-launch calibrations of CDS and EIS. During the 2007 flight, EUNIS, SOHO CDS and Hinode EIS observed the same solar locations, allowing the EUNIS calibrations to be directly applied to both CDS and EIS. The measured CDS NIS 1 line intensities calibrated with the standard (version 4) responsivities with the standard long-term corrections are found to be too low by a factor of 1.5 due to the decrease in responsivity. The EIS calibration update is performed in two ways. One is using the direct calibration transfer of the calibrated EUNIS-07 short wavelength (SW) channel. The other is using the insensitive line pairs, in which one member was observed by EUNIS-07 long wavelength (LW) channel and the other by EIS in either LW or SW waveband. Measurements from both methods are in good agreement, and confirm (within the measurement uncertainties) the EIS responsivity measured directly before the instrument's launch. The measurements also suggest that the EIS responsivity decreased by a factor of about 1.2 after the first year of operation. The shape of the EIS SW response curve obtained by EUNIS-07 is consistent with the one measured in laboratory prior to launch. The absolute value of the quiet-Sun He II 304 A intensity measured by EUNIS-07 is consistent with the radiance measured by CDS NIS in quiet regions near the disk center and the solar minimum irradiance obtained by CDS NIS and SDO/EVE recently.
description: 16 pages, 14 figures, 5 tables, accepted by ApJ Supplement (Sep. 2011)
ABUNDANCIA DE DETRITÍVOROS FRAGMENTADORES EN CORRIENTES DE LOS ANDES VENEZOLANOS
Creators: name: Leal, María
name: Rincón, José
Publisher: name: Zenodo
Year: 2019
Subjects: Insectos Acuáticos, Detritivoro fragmentador, Materia Orgánica, Andes, Venezuela

description: Resumen del trabajo presentado ante el congreso sobre macroinvertebrados acuáticos celebrado en Julio 2018 en Quito, Ecuador
From Laurent Series to Exact Meromorphic Solutions: the Kawahara equation
Creators: name: Demina, Maria V.
name: Kudryashov, Nikolay A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: Nonlinear waves are studied in a mixture of liquid and gas bubbles. Influence of viscosity and heat transfer is taken into consideration on propagation of the pressure waves. Nonlinear evolution equations of the second and the third order for describing nonlinear waves in gas-liquid mixtures are derived. Exact solutions of these nonlinear evolution equations are found. Properties of nonlinear waves in a liquid with gas bubbles are discussed.
description: 19 pages
In Our Hands: Designing for Mobile Devices
Creators: name: Caissie, Belina
Publisher: name: Graduate Studies
Year: 2018
Subjects: subject: Mobile Devices
subject: iPads
subject: Participatory Action Research
subject: Education--Sciences
subject: Education--Technology
subject: Education

description: Two significant impacts on K–12 learning environments are the increasing diversity of learners and one-to-one learning environments. Over the last two decades, several large-scale, provincially-funded projects have supported one-to-one technology in education and equity in Alberta’s education system. For example, the iPad was appropriated by education at an unprecedented rate. This participatory action research study engaged fifth-grade students and their teacher in an exploration of their science learning and teaching with iPads as the one-to-one mobile device used. Two main types of action research cycles occurred: 1) technology and 2) teaching and learning. Multiple action research cycles were carried out concurrently to investigate: In what ways does the design of technology-enabled, inclusive learning environments impact teacher and student learning and agency in middle school? Data collection methods included focus groups, individual interviews, observations, researcher journaling, a survey, documents, and artifacts. Three process findings emerged through the student focus groups: challenges, customization, and choice. Seven impact findings were evident from the classroom observations and individual interviews: increased collaboration, improved student engagement, student empowerment, teacher empowerment, technology-enhanced learning environment, shifts in teachers’ perceptions of learners, and shifts in students’ perceptions. This study revealed that a technology-rich classroom does not automatically create a technology-enhanced learning environment. Systemic barriers mute the potential of one-to-one access. When the design of technology integration at both the school and school authority level creates significant barriers to effective student and teacher use of mobile devices as pedagogical tools, the ability of both teachers and students to act in new and innovative ways is thwarted. The inability to act in new and innovative ways makes it difficult for teachers and students to develop and exert their agency. The findings of this study imply that the potential of iPads is not being fully realized in the context of learning and teaching as well as provides insight on how iPads can be leveraged as pedagogical devices. Ten recommendations for educational stakeholders, including the Department of Education, educational leaders, teachers, and Faculties of Education, are presented to support a shift from technology-rich classrooms to technology-enhanced learning environments.
Minimality of planes in normed spaces
Creators: name: Burago, Dmitri
name: Ivanov, Sergei
Publisher: name: arXiv
Year: 2012
Subjects: subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52A21, 52A38, 52A40, 53C60

description: We prove that a region in a two-dimensional affine subspace of a normed space $V$ has the least 2-dimensional Hausdorff measure among all compact surfaces with the same boundary. Furthermore, the 2-dimensional Hausdorff area density admits a convex extension to $Λ^2 V$. The proof is based on a (probably) new inequality for the Euclidean area of a convex centrally-symmetric polygon.
description: 10 pages, v2: minor changes according to referees' comments, to appear in GAFA
Scaling properties and universality of first-passage time probabilities in financial markets
Creators: name: Perelló, Josep
name: Gutiérrez-Roig, Mario
name: Masoliver, Jaume
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Mathematical Physics (math-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: Financial markets provide an ideal frame for the study of crossing or first-passage time events of non-Gaussian correlated dynamics mainly because large data sets are available. Tick-by-tick data of six futures markets are herein considered resulting in fat tailed first-passage time probabilities. The scaling of the return with the standard deviation collapses the probabilities of all markets examined, and also for different time horizons, into single curves, suggesting that first-passage statistics is market independent (at least for high-frequency data). On the other hand, a very closely related quantity, the survival probability, shows, away from the center and tails of the distribution, a hyperbolic $t^{-1/2}$ decay typical of a Markovian dynamics albeit the existence of memory in markets. Modifications of the Weibull and Student distributions are good candidates for the phenomenological description of first-passage time properties under certain regimes. The scaling strategies shown may be useful for risk control and algorithmic trading.
description: 7 pages, 5 figures
New Constructions of Identity-Based and Key-Dependent Message Secure Encryption Schemes
Creators: name: Döttling, Nico
name: Garg, Sanjam
name: Hajiabadi, Mohammad
name: Masny, Daniel
Publisher: name: CISPA
Year: 2023

description: Recently, Döttling and Garg (CRYPTO 2017) showed how to build identity-based encryption (IBE) from a novel primitive termed Chameleon Encryption, which can in turn be realized from simple number theoretic hardness assumptions such as the computational Diffie-Hellman assumption (in groups without pairings) or the factoring assumption. In a follow-up work (TCC 2017), the same authors showed that IBE can also be constructed from a slightly weaker primitive called One-Time Signatures with Encryption (OTSE). In this work, we show that OTSE can be instantiated from hard learning problems such as the Learning With Errors (LWE) and the Learning Parity with Noise (LPN) problems. This immediately yields the first IBE construction from the LPN problem and a construction based on a weaker LWE assumption compared to previous works. Finally, we show that the notion of one-time signatures with encryption is also useful for the construction of key-dependent-message (KDM) secure public-key encryption. In particular, our results imply that a KDM-secure public key encryption can be constructed from any KDM-secure secret-key encryption scheme and any public-key encryption scheme.
title: Methode zur Analyse der Tropfenpositionierung im Inkjet-Druck
Creators: name: Schneider, Claus
Publisher: name: UNSPECIFIED
Year: 2023

description: Inkjet-Druckmaschinen befinden sich auf dem Weg zu mehr Produktivität und Zuverlässigkeit. Da der Produktionsdruck zunehmend personalisiert wird und die Chargen kleiner werden, steigt die Nachfrage nach dem Digitaldruck mit seiner erhöhten Flexibilität. Zwei verbleibende Nachteile sind die geringere Produktionsgeschwindigkeit und Druckqualität. Die Inkjet-Technologie bringt derzeit noch viele Schwächen und Herausforderungen mit sich, wie z. B. die im Vergleich zum konventionellen Druck erhöhte Neigung zu sichtbaren Fehlern im Druckergebnis. In dieser Arbeit wird eine Methodik vorgestellt, die mit einem kamerabasierten Inspektionssystem und einem Simulationsmodell der Bilderfassung die Analyse der Tropfenpositionierung in Produktionsdruckmaschinen ermöglicht. Die Untersuchungen zeigen, wie im laufenden Druckbetrieb bei minimaler Makulatur eine vollständige Überprüfung aller Druckdüsen erfolgt. Die Herangehensweise lässt sich auf die Überprüfung von bedarfsgesteuert aufgetragener, transparenter Grundierung übertragen. Darüber hinaus wird eine Methode für Kompensationen und Korrekturen unter Berücksichtigung der Messdaten, die in der Produktionsdruckmaschine erfasst werden, abgeleitet. Durch die Kombination von Bildauswertung, zielgerichteten Testmustern und einem Regressionsmodell können gegenüber dem Stand der Technik und der Wissenschaft schnellere und erfolgversprechendere Maßnahmen erfolgen, die zu weniger Druckprodukten mit minderer Druckqualität führen. Experimente zur vorgestellten Methodik zeigen die Grenzen der Kompensationsgeschwindigkeit sowie die Fähigkeit und Qualität des Ansatzes, mit Druckfehlern umzugehen. Als Resultat der Korrekturmaßnahmen wird die Druckqualität auf einem konstant hohen Niveau gehalten und die Verfügbarkeit der Druckmaschine steigt.