4,602 research outputs found
Plasma Probe C, D, and E, volume 1 Final engineering report
Plasma probe for Pioneer spacecraft to measure ion and electron density and angular distribution in spac
Hipoparatiroidismo primario en un perro
Una perra Terrier de 8 años se presentó con convulsiones generalizadas agudas. El animal sufría hipocalcemia severa persistente, fosfatemia en el rango superior o elevada y niveles de PTH compatibles con hipoparatirodismo primario. Tras 21 meses de tratamiento el animal sólo requiere la administración de calcitriol a días alternos.
Bubble collapse near porous plates
A gas or vapour bubble near a solid boundary collapses towards the boundary
due to the asymmetry induced by the nearby boundary. High surface pressure and
shear stress from this collapse can damage, or clean, the surface. A porous
boundary, such as a filter, would act similarly to a solid boundary but with
reduced asymmetry and thus reduced effect. Prior research has measured the
cleaning effect of bubbles on filters using ultrasonic cleaning, but it is not
known how the bubble dynamics are fundamentally affected by the porosity of the
surface. We address this question experimentally by investigating how the
standoff distance, porosity, pore size, and pore shape affect two collapse
properties: bubble displacement and bubble rebound size. We show that these
properties depend primarily on the standoff distance and porosity of the
boundary and extend a previously developed numerical model that approximates
this behaviour. Using the numerical model in combination with experimental
data, we show that bubble displacement and bubble rebound size each collapse
onto respective single curves
Spatial rogue waves in photorefractive SBN crystals
We report on the excitation of large-amplitude waves, with a probability of
around 1% of total peaks, on a photorefractive SBN crystal by using a simple
experimental setup at room temperature. We excite the system using a narrow
Gaussian beam and observe different dynamical regimes tailored by the value and
time rate of an applied voltage. We identify two main dynamical regimes: a
caustic one for energy spreading and a speckling one for peak emergence. Our
observations are well described by a two-dimensional Schr\"odinger model with
saturable local nonlinearity.Comment: 4 pages, 4 figure
Lesión quística calcificada periféricamente en el biceps femoral de un perro
Un perro pastor alemán macho de 7 meses de edad se presentó a consulta por la aparición de un abultamiento marcado en los músculos flexores de la extremidad posterior derecha. El estado general era normal y no había otros síntomas. A la palpación había dolor moderado, la masa estaba bien delimitada y tenía consistencia blanda pero con cierta tensión que sugería la existencia de una cavidad rellena de líquido o gas. Se sospechó de un origen traumático y se trató inicialmente con prednisona, a dosis antiinflamatoria, y diuréticos. Después de cinco días el tamaño de la lesión no se había reducido y una biopsia con aguja fina obtuvo un exuda do serohemorrágico. Se colocó un drenaje penrose y se realizaron varias biopsias para histopatología. Microscópicamente la lesión estaba formada por tejido fibroso aparentemente aséptico. Un examen radiográfico posterior demostró la presencia de calcificación periférica
Generalized Limits for Parameter Sensitivity via Quantum Ziv-Zakai Bound
We study the generalized limit for parameter sensitivity in quantum
estimation theory considering the effects of repeated and adaptive
measurements. Based on the quantum Ziv-Zakai bound, we derive some lower bounds
for parameter sensitivity when the Hamiltonian of system is unbounded and when
the adaptive measurements are implemented on the system. We also prove that the
parameter sensitivity is bounded by the limit of the minimum detectable
parameter. In particular, we examine several known states in quantum phase
estimation with non-interacting photons, and show that they can not perform
better than Heisenberg limit in a much simpler way with our result.Comment: 8pages, 5 figure
Quantum Rod Emission Coupled to Plasmonic Lattice Resonances: A Collective Directional Source of Polarized Light
We demonstrate that an array of optical antennas may render a thin layer of
randomly oriented semiconductor nanocrystals into an enhanced and highly
directional source of polarized light. The array sustains collective plasmonic
lattice resonances which are in spectral overlap with the emission of the
nanocrystals over narrow angular regions. Consequently, different photon
energies of visible light are enhanced and beamed into definite directions.Comment: 4 pages, 3 figure
Coexistence of Paramagnetic-Charge-Ordered and Ferromagnetic-Metallic Phases in La0.5Ca0.5MnO3 evidenced by ESR
Throughout a complete Electron Spin Resonance (ESR) and magnetization study
of La0.5Ca0.5MnO3, we discuss about the nature of the complex phase-segregated
state established in this compound below T~210 K. Between TN<T<TC, the ESR
spectra shows two lines characteristic of two different magnetic phases. From
the resonance field (Hr) derived for each line we argue that the
incommensurate-charge-ordering phase (ICO) which coexists with
ferromagnetic-metallic (FMM) clusters in this temperature interval, is mainly
paramagnetic and not antiferromagnetic. The FMM/ICO ratio can be tuned with a
relatively small field, which suggests that the internal energy associated with
those phases is very similar. Below TN, there is an appreciable FM contribution
to the magnetization and the ESR spectra indicates the presence of FM clusters
in an antiferromagnetic matrix (canted). Our results show that ESR could be a
very useful tool to investigate the nature of the phase-separated state now
believed to play a fundamental role in the physics of mixed valent manganites.Comment: 6 pages, 6 figure
ComplexWorld Position Paper
The Complex ATM Position Paper is the common research vehicle that defines the high-level, strategic scientific vision for the ComplexWorld Network. The purpose of this document is to provide an orderly and consistent scientific framework for the WP-E complexity theme. The specific objectives of the position paper are to:
- analyse the state of the art within the different research areas relevant to the network, identifying the major accomplishments and providing a comprehensive set of references, including the main publications and research projects;
- include a complete list of , a list of application topics, and an analysis of which techniques are best suited to each one of those applications;
- identify and perform an in-depth analysis of the most promising research avenues and the major research challenges lying at the junction of ATM and complex systems domains, with particular attention to their impact and potential benefits for the ATM community;
- identify areas of common interest and synergies with other SESAR activities, with special attention to the research topics covered by other WP-E networks.
An additional goal for future versions of this position paper is to develop an indicative roadmap on how these research challenges should be accomplished, providing a guide on how to leverage on different aspects of the complexity research in Air Transport
Lower Cretaceous (Hauterivian-Albian) ammonite biostratigraphy in the Maestrat Basin (E Spain)
Peer reviewedPublisher PD
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