cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the Convergence of Finite Element Methods for Hamilton-Jacobi-Bellman Equations
Creators: name: Jensen, Max
name: Smears, Iain
Publisher: name: arXiv
Year: 2011
Subjects: subject: Numerical Analysis (math.NA)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 65M12, 65M60, 49L25, 49M25

description: In this note we study the convergence of monotone P1 finite element methods on unstructured meshes for fully non-linear Hamilton-Jacobi-Bellman equations arising from stochastic optimal control problems with possibly degenerate, isotropic diffusions. Using elliptic projection operators we treat discretisations which violate the consistency conditions of the framework by Barles and Souganidis. We obtain strong uniform convergence of the numerical solutions and, under non-degeneracy assumptions, strong L2 convergence of the gradients.
description: Keywords: Bellman equations, finite element methods, viscosity solutions, fully nonlinear operators; 18 pages, 1 figure
Criterion for the integrality of the Taylor coefficients of mirror maps in several variables
Creators: name: Delaygue, Eric
Publisher: name: arXiv
Year: 2011
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We give a necessary and sufficient condition for the integrality of the Taylor coefficients at the origin of formal power series $q_i({\mathbf z})=z_i\exp(G_i({\mathbf z})/F({\mathbf z}))$, with ${\mathbf z}=(z_1,...,z_d)$ and where $F({\mathbf z})$ and $G_i({\mathbf z})+\log(z_i)F({\mathbf z})$, $i=1,...,d$ are particular solutions of certain A-systems of differential equations. This criterion is based on the analytical properties of Landau's function (which is classically associated with the sequences of factorial ratios) and it generalizes the criterion in the case of one variable presented in "Critère pour l'intégralité des coefficients de Taylor des applications miroir" [J. Reine Angew. Math.]. One of the techniques used to prove this criterion is a generalization of a version of a theorem of Dwork on the formal congruences between formal series, proved by Krattenthaler and Rivoal in "Multivariate $p$-adic formal congruences and integrality of Taylor coefficients of mirror maps" [arXiv:0804.3049v3, math.NT]. This criterion involves the integrality of the Taylor coefficients of new univariate mirror maps listed in "Tables of Calabi--Yau equations" [arXiv:math/0507430v2, math.AG] by Almkvist, van Enckevort, van Straten and Zudilin.
Dialogue between legal systems: “The added value of the notarial act” Society of Scrivener Notaries and International Union of Notaries
Creators: name: Chikoc Barreda, Naivi
Publisher: name: My University
Year: 2023
Subjects: civil law
common law
notary
notarial law

description: Report presented by Naivi Chikoc Barreda, notary from Quebec and professor, University of Ottawa.
ЛЕЧЕНИЕ ВНУТРИ И ОКОЛОСУСТАВНЫХ ПЕРЕЛОМОВ НИЖНЕЙ ТРЕТИ БЕДРЕННОЙ КОСТИ У БОЛЬНЫХ С ПОЛИТРАВМОЙ МЕТОДОМ КОНВЕРСИОННОГО ОСТЕОСИНТЕЗА
Creators: name: СОЛОД Э.И.
name: ЗАГОРОДНИЙ Н.В.
name: ЛАЗАРЕВ А.Ф.
name: АБДУЛХАБИРОВ М.А.
name: АЛСМАДИ Я.М.
name: ДМИТРОВ И.А.
Publisher: name: Трудный пациент
Year: 2020
Subjects: КОНТРОЛЬ ПОВРЕЖДЕНИЙ
ПЕРЕЛОМЫ БЕДРЕННОЙ КОСТИ
АППАРАТЫ НАРУЖНОЙ ФИКСАЦИИ
ОСТЕОСИНТЕЗ
ПОЛИТРАВМА
ДИСТАЛЬНАЯ ЧАСТЬ БЕДРЕННОЙ КОСТИ
DAMAGE CONTROL
FEMORAL FRACTURES
EXTERNAL FIXATION DEVICES
OSTEOSYNTHESIS
POLYTRAUMA
DISTAL PART OF THE FEMUR

description: Лечение пациентов с переломами бедренной кости приобретает особую актуальность в современной травматологии, особенно у пострадавших с политравмой. Лечение таких переломов осложняется тем, что зависит не только от самого характера перелома, но и от общего состояния пациента. Такие переломы, вызванные высокоэнергетической травмой, имеют, как правило, оскольчатый или фрагментарный характер и часто сопровождаются сосудисто-нервными осложнениями, особенно в дистальном отделе. Такие переломы также часто сопровождаются повреждением мягких тканей. Целью работы улучшение результатов лечения внутрии околосуставных переломов дистального отдела бедренной кости у пациентов с политравмой. Материалы и методы. Проведен проспективный анализ использования конверсионного остеосинтеза при лечении 72 пациентов с внутрии околосуставными переломами нижней трети бедренной кости на фоне политравмы по шкале оценки тяжести ISS 17-40 в условиях многопрофильного стационара. Результаты. Оптимальные сроки для конверсионного остеосинтеза пациентам с политравмой составили 5-7 сут, что предотвратило возникновение травматического шока, воспалительных осложнений в послеоперационном периоде. Выводы. Проведенное исследование подтвердило целесообразность конверсионного остеосинтеза в лечении больных с внутрии околосуставными переломами нижней трети бедренной кости. Использование методики перевода фиксации отломков аппаратом наружной фиксации на внутренний остеосинтез (конверсия) способствовало сокращению сроков стационарного лечения пациентов с переломами длинных костей.
Structure and Magnetic Properties of the Pyrochlore Iridate Y2Ir2O7
Creators: name: Shapiro, M. C.
name: Riggs, S. C.
name: Stone, M. B.
name: de la Cruz, C. R.
name: Chi, S.
name: Podlesnyak, A. A.
name: Fisher, I. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Neutron powder diffraction and inelastic measurements were performed examining the 5d pyrochlore Y$_2$Ir$_2$O$_7$. Temperature dependent measurements were performed between 3.4 K and 290 K, spanning the magnetic transition at 155 K. No sign of any structural or disorder induced phase transition was observed over the entire temperature range. In addition, no sign of magnetic long-range order was observed to within the sensitivity of the instrumentation. These measurements do not rule out long range magnetic order, but the neutron powder diffraction structural refinements do put an upper bound for the ordered iridium moment of $\sim$ 0.2 $μ_B /$Ir (for a magnetic structure with wave vector $Q \neq 0$) or $\sim$ 0.5 $μ_B /$Ir (for Q = 0).
description: 5 pages, 8 figures
РЕАБИЛИТАЦИЯ БОЛЬНЫХ ПОСЛЕ ГЕРНИОПЛАСТИКИ В РАННЕМ ПОСЛЕОПЕРАЦИОННОМ ПЕРИОДЕ
Creators: name: ПЕТРУШКО С.И.
name: ПОРТНЯГИН Е.В.
name: МИЧУРОВ Е.И.
name: РЕПИНА Е.В.
name: САГЫНАЛИЕВ А.С.
name: РОЖИНА А.В.
Publisher: name: Трудный пациент
Year: 2020
Subjects: ГРЫЖА ЖИВОТА
ГЕРНИОПЛАСТИКА
КИНЕЗИОТЕЙПИРОВАНИЕ
РЕАБИЛИТАЦИЯ
ABDOMINAL HERNIA
HERNIOPLASTY
KINESIOTHERAPY
REHABILITATION

description: Грыжи передней брюшной стенки на сегодняшний день являются распространенным заболеванием в абдоминальной хирургии. В настоящей статье обсуждаются этиопатогенез, различные классификации грыж. Кратко изложены способы оперативного лечения грыж живота. Наиболее подробно описан период раннего восстановления после пластики грыж живота. Прогноз для пациентов после оперативного вмешательства грыж живота благоприятный, так как методы ЛФК направлены на скорейшее восстановления трудовой деятельности и снижение рецидива грыж.
Activity-Brightness Correlations for the Sun and Sun-like Stars
Creators: name: Preminger, Dora
name: Chapman, Gary
name: Cookson, Angela
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyze the effect of solar features on the variability of the solar irradiance in three different spectral ranges. Our study is based on two solar-cycles' worth of full-disk photometric images from the San Fernando Observatory, obtained with red, blue and Ca II K-line filters. For each image we measure the photometric sum, Sigma, which is the relative contribution of solar features to the disk-integrated intensity of the image. The photometric sums in the red and blue continuum, Sigma_r and Sigma_b, exhibit similar temporal patterns: they are negatively correlated with solar activity, with strong short-term variability and weak solar-cycle variability. However, the Ca II K-line photometric sum, Sigma_K, is positively correlated with solar activity and has strong variations on solar-cycle timescales. We show that we can model the variability of the Sun's bolometric flux as a linear combination of Sigma_r and Sigma_K. We infer that, over solar-cycle timescales, the variability of the Sun's bolometric irradiance is directly correlated with spectral line variability, but inversely correlated with continuum variability. Our blue and red continuum filters are quite similar to the Strömgren b and y filters used to measure stellar photometric variability. We conclude that active stars whose visible continuum brightness varies inversely with activity, as measured by the Ca HK index, are displaying a pattern that is similar to that of the Sun, i.e. radiative variability in the visible continuum that is spot-dominated.
description: Accepted by ApJ Letters, 2011
Robust a posteriori error estimation for discontinuous Galerkin methods for convection diffusion problems
Creators: name: Zhu, Liang
Publisher: name: University of British Columbia
Year: 2010

description: The present thesis is concerned with the development and practical implementation of robust a-posteriori error estimators for discontinuous Galerkin (DG) methods for convection-diffusion problems. It is well-known that solutions to convection-diffusion problems may have boundary and internal layers of small width where their gradients change rapidly. A powerful approach to numerically resolve these layers is based on using hp-adaptive finite element methods, which control and minimize the discretization errors by locally adapting the mesh sizes (h-refinement) and the approximation orders (p-refinement) to the features of the problems. In this work, we choose DG methods to realize adaptive algorithms. These methods yield stable and robust discretization schemes for convection-dominated problems, and are naturally suited to handle local variations in the mesh sizes and approximation degrees as required for hp-adaptivity. At the heart of adaptive finite element methods are a-posteriori error estimators. They provide information on the errors on each element and indicate where local refinement/derefinement should be applied. An efficient error estimator should always yield an upper and lower bound of the discretization error in a suitable norm. For convection-diffusion problems, it is desirable that the estimator is also robust, meaning that the upper and lower bounds differ by a factor that is independent of the mesh Peclet number of the problem. We develop a new approach to obtain robust a-posteriori error estimates for convection-diffusion problems for h-version and hp-version DG methods. The main technical tools in our analysis are new hp-version approximation results of an averaging operator, which are derived for irregular hexahedral meshes in three dimensions, as well as for irregular anisotropic rectangular meshes in two dimensions. We present a series of numerical examples based on C++ implementations of our methods. The numerical results indicate that the error estimator is effective in locating and resolving interior and boundary layers. For the hp-adaptive algorithms, once the local mesh size is of the same order as the width of boundary or interior layers, both the energy error and the error estimator are observed to converge exponentially fast in the number of degrees of freedom.
ПРАВОВОЕ РЕГУЛИРОВАНИЕ ВЫПОЛНЕНИЯ ОПЕРАЦИЙ ТРАХЕОСТОМИИ, КОНИКОТОМИИ
Creators: name: ГОРБАЧЕВ В.И.
name: ИТЫГИЛОВ М.Ю.
name: ГОРБАЧЕВ С.В.
Publisher: name: Трудный пациент
Year: 2020
Subjects: АНЕСТЕЗИОЛОГ-РЕАНИМАТОЛОГ
ТРАХЕОСТОМИЯ
КОНИКОТОМИЯ
ПРИКАЗ
ТРУДНЫЕ ДЫХАТЕЛЬНЫЕ ПУТИ
ANESTHESIOLOGIST-RESUSCITATOR
TRACHEOSTOMY
CRICOTHYROTOMY
DIFFICULT AIRWAYS

description: Статья посвящена актуальной проблеме в анестезиологии-реаниматологии осуществлению одной из важнейших инвазивных специальных манипуляций в отделении реанимации и интенсивной терапии. В статье рассматриваются основные нормативно-правовые документы, касающиеся выполнения трахеостомии и коникомии. Кто должен их выполнять и имеет на это право. Часть работы посвящена процедуре ухода за трахеостомой.
Degrees of Freedom of Interference Channels with CoMP Transmission and Reception
Creators: name: Annapureddy, V. Sreekanth
name: Gamal, Aly El
name: Veeravalli, Venugopal V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We study the Degrees of Freedom (DoF) of the K-user interference channel with coordinated multi-point (CoMP) transmission and reception. Each message is jointly transmitted by M_t successive transmitters, and is jointly received by M_r successive receivers. We refer to this channel as the CoMP channel with a transmit cooperation order of M_t and receive cooperation order of M_r. Since the channel has a total of K transmit antennas and K receive antennas, the maximum possible DoF is equal to K. We show that the CoMP channel has K DoF if and only if M_t + M_r is greater than or equal to K+1. For the general case, we derive an outer bound that states that the DoF is bounded above by the ceiling of (K+M_t+M_r-2)/2. For the special case with only CoMP transmission, i.e, M_r = 1, we propose a scheme that can achieve (K+M_t-1)/2 DoF for all K < 10, and conjecture that the result holds true for all K . The achievability proofs are based on the notion of algebraic independence from algebraic geometry.
description: Submitted to IEEE Transactions on Information Theory
I am passionate therefore I am: The interplay between entrepreneurial passion, gender, culture and intentions
Creators: name: Kyriakopoulos, Panagiotis
name: Herbert, Kendall
name: Piperopoulos, Panagiotis
Publisher: name: La Trobe
Year: 2023
Subjects: classificationCode: 35
subject: Commerce, management, tourism and services

description: We investigate the role of gender and culture on the relationship between entrepreneurial passion and entrepreneurial intentions, using social cognitive theory as the underlying theoretical framework. We place our research in two culturally different nations, namely, the United Kingdom, which belongs to the Anglo cluster and Greece, which belongs to the Mediterranean cluster. Our results demonstrate the direct (positive) effect of entrepreneurial passion on entrepreneurial intentions, but also unveil that despite the correlational relationship between passion and gender suggesting that women have greater passion than men, it is men’s passion that is a marginally stronger predictor of entrepreneurial intentions. We also find that cultural context plays an important moderating role in the relationship between passion and entrepreneurial intentions. But contrary to our expectations, we find that Greece compared to the UK is more conducive to the entrepreneurial passion and entrepreneurial intentions relationship. Implications for research and practice are discussed.
Generation of a decoherence-free entangled state using a radio frequency dressed state
Creators: name: Noguchi, Atsushi
name: Haze, Shinsuke
name: Toyoda, Kenji
name: Urabe, Shinji
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose the generation of entangled states with trapped calcium ions using a combination of an rf dressed state and a spin dependent force. Using this method, a decoherence-free entangled state of rf qubits can be directly generated and ideally its fidelity is close to unity. We demonstrate an rf entangled state with a fidelity of 0.68, which has a coherence time of more than 200 ms by virtue of the fact that it is an eigenstate with energy gaps between adjacent levels.Using the same technique, we also produce a qutrit-qutrit entangled state with a fidelity of 0.77, which exceeds the threshold value for separability of 2/3.
description: 4 figures
Exploratory research into environmental education, and digital media production : a subject/ive mosaic
Creators: name: Reid, John Morgan
Publisher: name: University of British Columbia
Year: 2010

description: Drawing from diverse data sources, this thesis explores issues associated with environmental education and digital media production. Working in an interpretive paradigm and developing concepts through anecdotes, literature study, interviews, and discussion, I invite the reader into a conversation that includes stories of learning about the environment, about digital media technology, and about teaching and learning experiences. Foregrounding my presence in this way envelops the field study and interview data in subjectivity, a tactic grounded in the theoretical notion of the co-construction of knowledge. The situations and dynamics associated with learning in the rapidly-changing fields of environmental education and digital media production are discussed as examples, meant to be used as catalysts for ongoing inquiry into how these kinds of learning, associated pedagogies, and the institutional arrangements in which they occur can be better understood. In addition to stories, the thesis includes qualitative research comprising interviews with two students and an instructor in a university course in which digital video production was used in an environmental education assignment. The interviews indicated the technological demands of the projects combined with the practices and choices of the students may have contributed to weaker self-reported outcomes. The author sets these interviews in juxtaposition with stories of his own experience to develop concepts and a series of practical, methodological, and theoretical questions to inform subsequent phases of research into learning systems, curriculum design, and pedagogy.
Electron acceleration driven by ultrashort and nonparaxial radially polarized laser pulses
Creators: name: Marceau, Vincent
name: April, Alexandre
name: Piché, Michel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Exact closed-form solutions to Maxwell's equations are used to investigate the acceleration of electrons in vacuum driven by ultrashort and nonparaxial radially polarized laser pulses. We show that the threshold power above which significant acceleration takes place is greatly reduced by using a tighter focus. Moreover, electrons accelerated by tightly focused single-cycle laser pulses may reach around 80% of the theoretical energy gain limit, about twice the value previously reported with few-cycle paraxial pulses. Our results demonstrate that the direct acceleration of electrons in vacuum is well within reach of the current laser technology.
description: 3 pages. Accepted for publication in Optics Letters
Public and Scientist Perceptions of Issues in Research
Creators: name: Anglin, Stephanie
name: Homan, Chris
name: Carey, Mary G.
name: Edlund, John
name: Boyce-Jacino, Christina
name: Baschnagel, Andrew
Publisher: name: OSF Registries
Year: 2023
Subjects: subject: Social and Behavioral Sciences

description: This is a survey study examining public and scientist perceptions of issues in research in psychology, medicine, computer science, and science in general.
Photon Trapping Enables Super-Eddington Growth of Black-Hole Seeds in Galaxies at High Redshift
Creators: name: Wyithe, Stuart
name: Loeb, Abraham
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We identify a physical mechanism that would have resulted in rapid, obscured growth of seed super-massive black-holes in galaxies at z>6. Specifically, we find that the density at the centre of typical high redshift galaxies was at a level where the Bondi accretion rate implies a diffusion speed of photons that was slower than the gravitational infall velocity, resulting in photons being trapped within the accretion flow and advected into the black-hole. We show that there is a range of black-hole masses (M_bh ~ 10^3-10^5 solar masses) where the accretion flow traps radiation, corresponding to black-holes that were massive enough to generate a photon trapping accretion flow, but small enough that their Bondi radii did not exceed the isothermal scale height of self-gravitating gas. Under these conditions we find that the accretion reaches levels far in excess of the Eddington rate. A prediction of this scenario is that X-ray number counts of active galactic nuclei at z>6 would exhibit a cutoff at the low luminosities corresponding to black-hole masses below ~10^5 solar masses. At low redshifts we find photon trapping to be unimportant because it could only occur in rare low spin halos, and would require black-hole masses in excess of expectations from the observed black-hole - halo mass relation. The super-Eddington growth of ~10^5 solar mass seed black-holes at high redshift may have provided a natural acceleration towards the growth of super-massive black-holes at z~6-7, less than a billion years after the Big Bang.
description: 10 pages, 4 figures. Submitted to MNRAS
Magnetic phase diagram of MnSi inferred from magnetization and ac susceptibility
Creators: name: Bauer, A.
name: Pfleiderer, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report simultaneous measurements of the magnetization and the ac susceptibility across the magnetic phase diagram of single-crystal MnSi. In our study we explore the importance of the excitation frequency, excitation amplitude, sample shape, and crystallographic orientation. The susceptibility, dM/dH, calculated from the magnetization, is dominated by pronounced maxima at the transition from the helical to the conical and the conical to the skyrmion lattice phase. The maxima in dM/dH are not tracked by the ac susceptibility, which in addition varies sensitively with the excitation amplitude and frequency at the transition from the conical to the skyrmion lattice phase. The same differences between dM/dH and the ac susceptibility exist for Mn1-xFexSi (x=0.04) and Fe1-xCoxSi (x=0.20). Taken together our study establishes consistently for all major crystallographic directions the existence of a single pocket of the skyrmion lattice phase in MnSi, suggestive of a universal characteristic of all B20 transition metal compounds with helimagnetic order.
description: 19 pages, 20 figures
Rupture of a Biomembrane under Dynamic Surface Tension
Creators: name: Bicout, D. J.
name: Kats, E. I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: How long a fluid membrane vesicle stressed with a steady ramp of micropipette last before rupture? Or conversely, how high the surface tension should be to rupture a membrane? To answer these challenging questions we have developed a theoretical framework that allows description and reproduction of Dynamic Tension Spectroscopy (DTS) observations. The kinetics of the membrane rupture under ramps of surface tension is described as a combination of initial pore formation followed by Brownian process of the pore radius crossing the time-dependent energy barrier. We present the formalism and derive (formal) analytical expression of the survival probability describing the fate of the membrane under DTS conditions. Using numerical simulations for the membrane prepared in an initial state with a given distribution of times for pore nucleation, we have studied the membrane lifetime (or inverse of rupture rate) and distribution of membrane surface tension at rupture as a function of membrane characteristics like pore nucleation rate, the energy barrier to failure and tension loading rate. It is found that simulations reproduce main features of the experimental data, particularly, the pore nucleation and pore size diffusion controlled limits of membrane rupture dynamics. This approach can also be applied to processes of permeation and pore opening in membranes (electroporation, membrane disruption by antimicrobial peptides, vesicle fusion).
description: 11 pages, 9 figures
Computer Supported Collaborative Processes in Virtual Organizations
Creators: name: Paszkiewicz, Zbigniew
name: Cellary, Wojciech
Publisher: name: arXiv
Year: 2012
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: In global economy, turbulent organization environment strongly influences organization's operation. Organizations must constantly adapt to changing circumstances and search for new possibilities of gaining competitive advantage. To face this challenge, small organizations base their operation on collaboration within Virtual Organizations (VOs). VO operation is based on collaborative processes. Due to dynamism and required flexibility of collaborative processes, existing business information systems are insufficient to efficiently support them. In this paper a novel method for supporting collaborative processes based on process mining techniques is proposed. The method allows activity patterns in various instances of collaborative processes to be identified and used for recommendation of activities. This provides an opportunity for better computer support of collaborative processes leading to more efficient and effective realization of business goals.
Dynamic instability of a growing adsorbed polymorphic filament
Creators: name: Zapperi, Stefano
name: Mahadevan, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: The intermittent transition between slow growth and rapid shrinkage in polymeric assemblies is termed dynamic instability, a feature observed in a variety of biochemically distinct assemblies including microtubules, actin and their bacterial analogs. The existence of this labile phase of a polymer has many functional consequences in cytoskeletal dynamics, and its repeated appearance suggests that it is relatively easy to evolve. Here, we consider the minimal ingredients for the existence of dynamic instability by considering a single polymorphic filament that grows by binding to a substrate, undergoes a conformation change, and may unbind as a consequence of the residual strains induced by this change. We identify two parameters that control the phase space of possibilities for the filament: a structural mechanical parameter that characterizes the ratio of the bond strengths along the filament to those with the substrate (or equivalently the ratio of longitudinal to lateral interactions in an assembly), and a kinetic parameter that characterizes the ratio of time scales for growth and conformation change. In the deterministic limit, these parameters serve to demarcate a region of uninterrupted growth from that of collapse. However, in the presence of disorder in either the structural or the kinetic parameter the growth and collapse phases can coexist where the filament can grow slowly, shrink rapidly, and transition between these phases, thus exhibiting dynamic instability. We exhibit the window for the existence of dynamic instability in a phase diagram that allows us to quantify the evolvability of this labile phase.
Length-Controlled Elasticity in 3D Fiber Networks
Creators: name: Broedersz, C. P.
name: Sheinman, M.
name: MacKintosh, F. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: We present a model for disordered 3D fiber networks to study their linear and nonlinear elasticity over a wide range of network densities and fiber lengths. In contrast to previous 2D models, these 3D networks with binary cross-links are under-constrained with respect to fiber stretching elasticity, suggesting that bending may dominate their response. We find that such networks exhibit a fiber length-controlled bending regime and a crossover to a stretch-dominated regime for lengths beyond a characteristic scale that depends on the fiber's elastic properties. Finally, by extending the model to the nonlinear regime, we show that these networks become intrinsically nonlinear with a vanishing linear response regime in the limit of floppy or long filaments.
description: 4 pages, 4 figures
Spatial patterns of large wood debris in the northern interior of British Columbia
Creators: name: Ewan, Melissa Anne
Publisher: name: University of British Columbia
Year: 2010

description: Large woody debris (LWD) patterns were investigated in 18 streams in the Interior of British Columbia for a variety of stream sizes (1.4-13.7 m bankfull width flow) and forest types (SBS and SBPS BEC Zones). Definition and scaling type for LWD are variable in the published literature. This research reported that both the definition used to define LWD and the scaling technique used to analyze and display LWD affected the results in LWD abundance and volume measures. Although LWD varies by forest type and stream size, the effect of the riparian forest on LWD loading was minimal compared to the effect of stream size for the 18 study sites. Stream characteristics were such as bankfull flow width and depth were identified as predictor variables for LWD abundance and volume. The distribution of LWD was different in wood associated with LWD jams than wood free in the stream. The importance of LWD jams increased relatively with stream size. LWD jams (1) were larger, (2) had an increasingly different distribution of LWD size classes, and (3) had a different distribution of position and orientation classes than free wood with increases in stream size. The patterns observed in the distribution of LWD for orientation and position classes as well as piece size was consistent with the literature: (1) perpendicular wood generally decreased while parallel increased with stream size; (2) bridged wood decreased while wood fully in the bed increased and (3) piece size generally increased with stream size.
The long-term spectroscopic misadventures of AG Dra with a nod toward V407 Cyg: Degenerates behaving badly
Creators: name: Shore, S. N.
name: Genovali, K.
name: Wahlgren, G. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present some results of an ongoing study of the long-term spectroscopic variations of AG Dra, a prototypical eruptive symbiotic system. We discuss the effects of the environment and orbital modulation in this system and some of the physical processes revealed by a comparison with the nova outburst of the symbiotic-like recurrent nova V407 Cyg 2010.
description: 11 pages, invited review to appear in the proceedings of the 2011 Asiago Workshop on Symbiotic Stars, A. Siviero and U. Munari eds., Baltic Astronomy special issue. See also http://etd.adm.unipi.it/theses/available/etd-05052010-002805/
Improvement on the decay of crossing numbers
Creators: name: Černý, Jakub
name: Kynčl, Jan
name: Tóth, Géza
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We prove that the crossing number of a graph decays in a continuous fashion in the following sense. For any epsilon>0 there is a delta>0 such that for a sufficiently large n, every graph G with n vertices and m > n^{1+epsilon} edges, has a subgraph G' of at most (1-delta)m edges and crossing number at least (1-epsilon)cr(G). This generalizes the result of J. Fox and Cs. Toth.
description: 7 pages, 1 figure
Particle Physics in a Season of Change
Creators: name: Quigg, Chris
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A digest of my opening remarks at the 2011 Hadron Collider Physics Symposium.
description: 6 pages, 2 figures, uses PDFLaTeX
Iterated function systems with a given continuous stationary distribution
Creators: name: Stenflo, Örjan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60J05 (Primary) 28A80, 37H99, 60F05, 65C05 (Secondary)

description: For any continuous probability measure $μ$ on ${\mathbb R}$ we construct an IFS with probabilities having $μ$ as its unique measure-attractor.
description: 7 pages, 3 figures
The influence of speed of processing on novel word learning
Creators: name: Bergmann, Christina
name: Rowland, Caroline
name: Egger, Julia
Publisher: name: OSF Registries
Year: 2020
Subjects: subject: First and Second Language Acquisition
subject: Linguistics
subject: FOS: Languages and literature
subject: Developmental Psychology
subject: Psycholinguistics and Neurolinguistics
subject: Social and Behavioral Sciences
subject: Psychology
subject: FOS: Psychology

description: The aim of this study is two-fold: First, we intend to replicate the results by Lany (2018) with Dutch 17-month-old infants. We expect that fast processors perform better at the novel word learning task than their peers with slower speed of processing. Second, we want to investigate the speed of processing of newly acquired words. Comparing the speed of processing of familiar words to that of novel words will shed some light on what speed of processing actually reflects: general cognitive capabilities, lexical processing efficiency, or item-specific facilitation. Infants will take part in a novel word learning task, during which we will also measure non-linguistic reaction time using the onset of the pictures. Furthermore, we will measure the infants’ speed of processing of both newly learned and familiar words in a looking while listening paradigm. Using the Dutch adaptation of the MacArthur Communicative Development Inventories (N-CDI), we will assess the infants’ vocabulary size through parental reports. The results of the present study will provide insights on the connection between speed of processing and vocabulary development as well as the individual differences of early child development.
Almost All of Kepler's Multiple Planet Candidates are Planets
Creators: name: Lissauer, Jack J.
name: Marcy, Geoffrey W.
name: Rowe, Jason F.
name: Bryson, Stephen T.
name: Adams, Elisabeth
name: Buchhave, Lars A.
name: Ciardi, David R.
name: Cochran, William D.
name: Fabrycky, Daniel C.
name: Ford, Eric B.
name: Fressin, Francois
name: Geary, John
name: Gilliland, Ronald L.
name: Holman, Matthew J.
name: Howell, Steve B.
name: Jenkins, Jon M.
name: Kinemuchi, Karen
name: Koch, David G.
name: Morehead, Robert C.
name: Ragozzine, Darin
name: Seader, Shawn E.
name: Tanenbaum, Peter G.
name: Torres, Guillermo
name: Twicken, Joseph D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present a statistical analysis that demonstrates that the overwhelming majority of Kepler candidate multiple transiting systems (multis) indeed represent true, physically-associated transiting planets. Binary stars provide the primary source of false positives among Kepler planet candidates, implying that false positives should be nearly randomly-distributed among Kepler targets. In contrast, true transiting planets would appear clustered around a smaller number of Kepler targets if detectable planets tend to come in systems and/or if the orbital planes of planets encircling the same star are correlated. There are more than one hundred times as many Kepler planet candidates in multi-candidate systems as would be predicted from a random distribution of candidates, implying that the vast majority are true planets. Most of these multis are multiple planet systems orbiting the Kepler target star, but there are likely cases where (a) the planetary system orbits a fainter star, and the planets are thus significantly larger than has been estimated, or (b) the planets orbit different stars within a binary/multiple star system. We use the low overall false positive rate among Kepler multis, together with analysis of Kepler spacecraft and ground-based data, to validate the closely-packed Kepler-33 planetary system, which orbits a star that has evolved somewhat off of the main sequence. Kepler-33 hosts five transiting planets with periods ranging from 5.67 to 41 days.
description: 16 pages, 9 figures
Top quark forward-backward asymmetry and W^prime bosons
Creators: name: Duffty, Daniel
name: Sullivan, Zack
name: Zhang, Hao
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The top quark forward-backward asymmetry measured at the Fermilab Tevatron collider deviates from the standard model prediction. A W^prime boson model is described, where the coupling W^prime-t-d is fixed by the tt_bar forward-backward asymmetry and total cross section at the Tevatron. We show that such a W^prime boson would be produced in association with a top quark at the CERN Large Hadron Collider (LHC), thus inducing additional tt_bar+j events. We use measurements of tt_bar+n-jet production from the LHC to constrain the allowed W^prime-t-d couplings as a function of W^prime boson mass. We find that this W^prime model is constrained at the 95% C.L. using 0.7 fb^{-1} of data from the LHC, and could be fully excluded with 5 fb^{-1} of data.
description: 6 pgs., 4 PS figures
Asymptotically Lifshitz wormholes and black holes for Lovelock gravity in vacuum
Creators: name: Matulich, Javier
name: Troncoso, Ricardo
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Static asymptotically Lifshitz wormholes and black holes in vacuum are shown to exist for a class of Lovelock theories in d=2n+1>7 dimensions, selected by requiring that all but one of their n maximally symmetric vacua are AdS of radius l and degenerate. The wormhole geometry is regular everywhere and connects two Lifshitz spacetimes with a nontrivial geometry at the boundary. The dynamical exponent z is determined by the quotient of the curvature radii of the maximally symmetric vacua according to n(z^2-1)+1=(l/L)^2, where L corresponds to the curvature radius of the nondegenerate vacuum. Light signals are able to connect both asymptotic regions in finite time, and the gravitational field pulls towards a fixed surface located at some arbitrary proper distance to the neck. The asymptotically Lifshitz black hole possesses the same dynamical exponent and a fixed Hawking temperature given by T=z/(2^z pi l). Further analytic solutions, including pure Lifshitz spacetimes with a nontrivial geometry at the spacelike boundary, and wormholes that interpolate between asymptotically Lifshitz spacetimes with different dynamical exponents are also found.
description: 19 pages, 1 figure
222Rn daughters influence on scaler mode of the ARGO-YBJ detector
Creators: name: Giroletti, Elio
name: Bolognino, Irene
name: Cattaneo, Claudio
name: Liguori, Giuseppe
name: Salvini, Paola
name: Vallania, Piero
name: Vigorito, Carlo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The ARGO-YBJ experiment is a full coverage air shower array; its lowest energy threshold is reached using the "scaler mode technique". Working in this mode, the signals generated by any particle hitting each cluster are put in coincidence every 150 ns and read by four independent scaler channels, giving the counting rates of multiplicity \geq1, \geq2, \geq3 and \geq4 (C1, C2, C3 and C4, respectively). The study of these counting rates pointed out a different behaviour of C1 respect to C2, C3 and C4, suggesting that C1 is detecting not only cosmic rays. This work shows that the radon (222Rn) gamma emitter daughters present in the ARGO-YBJ building air are contributing to C1 counts at the level of 1 Hz each Bq/m3 of radon. The uncertainty about this contribution is great, because of the high variability of 222Rn concentration and the building ventilation. The radon monitoring will allow the C1 correction improving the sensitivity of the ARGO-YBJ experiment at its lowest energy threshold.
description: 4 pages, 3 figures, Proceedings of the 32nd International Cosmic Ray Conference (ICRC)
Chiroderma villosum Peters 1860
Creators: name: Garbino, Guilherme S. T.
name: Nogueira, Marcelo R.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Phyllostomidae
Chiroderma
Chiroderma villosum

description: Chiroderma villosum Peters, 1860 (ZMB_MAM 408)
 Peters (1860) described Chiroderma villosum based on two specimens: one female from Brazil (ZMB _MAM 408), and a skeleton of unknown provenance. The former specimen is a skin with the skull inside, but badly preserved; the skin color is faded, the inner pair of facial stripes are barely visible, and the only external measurement we were able to take was the forearm length, estimated in 47.9 mm (right forearm). The distance between upper canines was 6.37 mm. The skin around the lips had been retracted, so the teeth, up to M1 and m1, are visible, allowing us to identify the diagnostic parallel upper inner incisors (Fig. 2 b, d). Since the skeleton could not be located (Carter and Dolan 1978, Turni and Kock 2008; C. Funk pers. comm. 2016), and because Peters described pelage and cranial characters of the specimen, Turni and Kock (2008) designated ZMB _MAM 408 as the lectotype.
 The label on ZMB _MAM 408 reads “ Sao Paulo Brasilien Sello”, but the catalogue, handwritten by Peters, mentions only Brazil (“Brasilia”), without any information on the collector (Fig. 3). In the original description of this taxon, Peters (1860:754) stated that Sellow supposedly collected the type and reported only Brazil as its source. Since there is not enough evidence to narrow the type locality of this widely distributed taxon, we suggest keeping it as Brazil, as adopted by most authors (e.g., Carter & Dolan 1978; Simmons 2005; Gardner 2008a). We also conclude, due to conflicting information (i.e., label vs. catalogue), that there is not enough evidence to affirm that the lectotype was collected by Sellow. Most of the Brazilian mammals deposited in the Museum für Naturkunde during the first decades of the 19th century were collected by Ignaz von Olfers in eastern Brazil, Friedrich Sieber in the state of Pará, Francisco Gomes in Bahia, and Sellow, also in eastern Brazil (Ávila-Pires 1967). Thus, the lectotype could have come from any one of these collectors and the localities they visited.
description: Published as part of Garbino, Guilherme S. T. & Nogueira, Marcelo R., 2017, On the mammals collected by Friedrich Sellow in Brazil and Uruguay (1814 – 1831), with special reference to the types and their provenance, pp. 172-190 in Zootaxa 4221 (2) on pages 176-177, DOI: 10.5281/zenodo.248623
Dark matter Search and the Scalar Quark Contents of the Nucleon
Creators: name: Dinter, Simon
name: Drach, Vincent
name: Jansen, Karl
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present lattice QCD simulation results from the European Twisted Mass Collaboration (ETMC) for the light, strange and charm quark contents of the nucleon. These quantities are important ingredients to estimate the cross-section for the detection of WIMPs as Dark Matter candidates. By employing a particular lattice QCD formulation, i.e. twisted mass fermions, accurate results of the light and strange scalar contents of the nucleon can be obtained. In addition, we provide a bound for the charm quark content of the nucleon.
description: Proceedings contribution to STARS2011, 8 pages
Universal law for waiting internal time in seismicity and its implication to earthquake network
Creators: name: Abe, Sumiyoshi
name: Suzuki, Norikazu
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geophysics (physics.geo-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: In their paper (Europhys. Lett., 71 (2005) 1036), Carbone, Sorriso-Valvo, Harabaglia and Guerra showed that "unified scaling law" for conventional waiting times of earthquakes claimed by Bak et al. (Phys. Rev. Lett., 88 (2002) 178501) is actually not universal. Here, instead of the conventional time, the concept of the internal time termed the event time is considered for seismicity. It is shown that, in contrast to the conventional waiting time, the waiting event time obeys a power law. This implies the existence of temporal long-range correlations in terms of the event time with no sharp decay of the crossover type. The discovered power-law waiting event-time distribution turns out to be universal in the sense that it takes the same form for seismicities in California, Japan and Iran. In particular, the parameters contained in the distribution take the common values in all these geographical regions. An implication of this result to the procedure of constructing earthquake networks is discussed.
description: 21 pages, 5 figures
Observation of Quantum Interference in Molecular Charge Transport
Creators: name: Guedon, Constant M.
name: Valkenier, Hennie
name: Markussen, Troels
name: Thygesen, Kristian S.
name: Hummelen, Jan C.
name: van der Molen, Sense Jan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: As the dimensions of a conductor approach the nano-scale, quantum effects will begin to dominate its behavior. This entails the exciting possibility of controlling the conductance of a device by direct manipulation of the electron wave function. Such control has been most clearly demonstrated in mesoscopic semiconductor structures at low temperatures. Indeed, the Aharanov-Bohm effect, conductance quantization and universal conductance fluctuations are direct manifestations of the electron wave nature. However, an extension of this concept to more practical emperatures has not been achieved so far. As molecules are nano-scale objects with typical energy level spacings (~eV) much larger than the thermal energy at 300 K (~25 meV), they are natural candidates to enable such a break-through. Fascinating phenomena including giant magnetoresistance, Kondo effects and conductance switching, have previously been demonstrated at the molecular level. Here, we report direct evidence for destructive quantum interference in charge transport through two-terminal molecular junctions at room temperature. Furthermore, we show that the degree of interference can be controlled by simple chemical modifications of the molecule. Not only does this provide the experimental demonstration of a new phenomenon in quantum charge transport, it also opens the road for a new type of molecular devices based on chemical or electrostatic control of quantum interference.