Science.gov

Sample records for ou sistemas produtivos

  1. El Sistema's Open Secrets

    ERIC Educational Resources Information Center

    Booth, Eric

    2011-01-01

    In this article, the author talks about Venezuela's national youth orchestra program called El Sistema whose attributes offer a direct challenge to traditional Western music practices. As U.S. classical music--and all "high arts"--struggle to find relevance to more than the small "arts club" percentage of the U.S. populace, El Sistema proposes…

  2. Tunable, nonlinear Hong-Ou-Mandel interferometer

    NASA Astrophysics Data System (ADS)

    Oehri, D.; Pletyukhov, M.; Gritsev, V.; Blatter, G.; Schmidt, S.

    2015-03-01

    We investigate the two-photon scattering properties of a Jaynes-Cummings (JC) nonlinearity consisting of a two-level system (qubit) interacting with a single-mode cavity, which is coupled to two waveguides, each containing a single incident photon wave packet initially. In this scattering setup, we study the interplay between the Hong-Ou-Mandel (HOM) effect arising due to quantum interference and effective photon-photon interactions induced by the presence of the qubit. We calculate the two-photon scattering matrix of this system analytically and identify signatures of interference and interaction in the second-order auto- and cross-correlation functions of the scattered photons. In the dispersive regime, when qubit and cavity are far detuned from each other, we find that the JC nonlinearity can be used as an almost linear, in situ tunable beam splitter giving rise to ideal Hong-Ou-Mandel interference, generating a highly path-entangled two-photon NOON state of the scattered photons. The latter manifests itself in strongly suppressed waveguide cross-correlations and Poissonian photon number statistics in each waveguide. If the two-level system and the cavity are on resonance, the JC nonlinearity strongly modifies the ideal HOM conditions leading to a smaller degree of path entanglement and sub-Poissonian photon number statistics. In the latter regime, we find that photon blockade is associated with bunched autocorrelations in both waveguides, while a two-polariton resonance can lead to bunched as well as antibunched correlations.

  3. Bimodal Hong-Ou-Mandel Interferometry

    NASA Astrophysics Data System (ADS)

    Sundarraman, Deepika; Gilliss, Thomas; Leary, Cody

    2013-03-01

    We investigate two-photon Hong-Ou-Mandel interference in several interferometric systems, in which each of the two interfering input photons exist in arbitrary linear superpositions of the first-order Hermite-Gaussian modes HG10 and HG01 . We find that if both input photons are in balanced superpositions of the HG10 and HG01 modes, the resulting two-photon interference can be engineered to transform these diagonal Hermite-Gaussian inputs into output modes of the Laguerre Gaussian type, which are entangled with respect to both output path and transverse spatial mode. We show that such two-photon interference effects can occur even if the input photons are prepared with distinguishable transverse spatial states. This work was supported in part by the Howard Hughes Medical Institute.

  4. Atomic Hong-Ou-Mandel experiment

    NASA Astrophysics Data System (ADS)

    Lopes, R.; Imanaliev, A.; Aspect, A.; Cheneau, M.; Boiron, D.; Westbrook, C. I.

    2015-04-01

    Two-particle interference is a fundamental feature of quantum mechanics, and is even less intuitive than wave-particle duality for a single particle. In this duality, classical concepts--wave or particle--are still referred to, and interference happens in ordinary space-time. On the other hand, two-particle interference takes place in a mathematical space that has no classical counterpart. Entanglement lies at the heart of this interference, as it does in the fundamental tests of quantum mechanics involving the violation of Bell's inequalities. The Hong, Ou and Mandel experiment is a conceptually simpler situation, in which the interference between two-photon amplitudes also leads to behaviour impossible to describe using a simple classical model. Here we report the realization of the Hong, Ou and Mandel experiment using atoms instead of photons. We create a source that emits pairs of atoms, and cause one atom of each pair to enter one of the two input channels of a beam-splitter, and the other atom to enter the other input channel. When the atoms are spatially overlapped so that the two inputs are indistinguishable, the atoms always emerge together in one of the output channels. This result opens the way to testing Bell's inequalities involving mechanical observables of massive particles, such as momentum, using methods inspired by quantum optics, and to testing theories of the quantum-to-classical transition. Our work also demonstrates a new way to benchmark non-classical atom sources that may be of interest for quantum information processing and quantum simulation.

  5. Thoughts on Seeing "El Sistema"

    ERIC Educational Resources Information Center

    Booth, Eric

    2009-01-01

    The FESNOJIV (the Spanish acronym for the State Foundation for the National System of Youth and Children's Orchestras), more commonly known as "El Sistema," teaches 300,000 of Venezuela's poorest children in the nationwide music learning program. Many begin attending the "nucleo" as early as age two or three, and the vast majority continue well…

  6. Knowledge Exchange with Sistema Scotland

    ERIC Educational Resources Information Center

    Allan, Julie; Moran, Nikki; Duffy, Celia; Loening, Gica

    2010-01-01

    This paper reports on a knowledge exchange project, funded by the Scottish Funding Council and undertaken by a group of researchers from three higher education institutions in Scotland and the project partner, Sistema Scotland. This newly established charity is attempting to implement a major programme of social change, developed in Venezuela,…

  7. Teaching quantum mechanics with the Hong-Ou-Mandel interferometer

    NASA Astrophysics Data System (ADS)

    Armendáriz, Gustavo; Cravioto-Lagos, Jorge; Velázquez, Victor; Grether, Marcela; López-Moreno, Enrique; Galvez, E. J.

    2014-07-01

    The Hong-Ou-Mandel interferometer is an optical device which allows us to prove experimentally the quantum nature of light via the quantum amplitude superposition of two indistinguishable photons. We have implemented this experiment as an advanced undergraduate laboratory experience. We were able to overcome well known difficulties with this experiment using recently reported techniques by Thomas et al. [Rev. Sci. Instr. 80, 036101 (2009), ].

  8. Eielson Air Force Base OU-1 baseline risk assessment

    SciTech Connect

    Jarvis, M.T.; Jarvis, T.T.; Van Houten, N.C.; Lewis, R.E.

    1993-09-01

    This Baseline Risk Assessment report is the second volume in a set of three volumes for operable Unit 1 (OU-1). The companion documents contain the Remedial Investigation and the Feasibility Study. Operable Unit 1 (OU-1) is one of several groups of hazardous waste sites located at Eielson Air Force Base (AFB) near Fairbanks, Alaska. The operable units at Eielson are typically characterized by petroleum, oil, lubricant/solvent contamination, and by the presence of organics floating at the water table. In 1989 and 1990, firms under contract to the Air Force conducted field studies to gather information about the extent of chemical contamination in soil, groundwater, and soil air pore space (soil gas) at the site. This report documents the results of a baseline risk assessment, which uses the 1989 and 1991 site characterization database to quantify the potential human health risk associated with past Base industrial activities in the vicinity of OU-1. Background data collected in 1992 were also used in the preparation of this report.

  9. Electron and hole Hong-Ou-Mandel interferometry

    NASA Astrophysics Data System (ADS)

    Jonckheere, T.; Rech, J.; Wahl, C.; Martin, T.

    2012-09-01

    We consider the electronic analog of the quantum optics Hong-Ou-Mandel interferometer in a realistic condensed matter device based on single electron emission in chiral edge states. For electron-electron collisions we show that the measurement of the zero-frequency current correlations at the output of a quantum point contact produces a dip giving precious information on the electronic wave packets and coherence. As a feature truly unique to Fermi statistics and condensed matter, we show that two-particle interferences between electron and hole in the Fermi sea can produce a positive peak in the current correlations, which we study for realistic experimental parameters.

  10. Hong-Ou-Mandel Interference with a Single Atom

    PubMed Central

    Ralley, K. A.; Lerner, I. V.; Yurkevich, I. V.

    2015-01-01

    The Hong-Ou-Mandel (HOM) effect is widely regarded as the quintessential quantum interference phenomenon in optics. In this work we examine how nonlinearity can smear statistical photon bunching in the HOM interferometer. We model both the nonlinearity and a balanced beam splitter with a single two-level system and calculate a finite probability of anti-bunching arising in this geometry. We thus argue that the presence of such nonlinearity would reduce the visibility in the standard HOM setup, offering some explanation for the diminution of the HOM visibility observed in many experiments. We use the same model to show that the nonlinearity affects a resonant two-photon propagation through a two-level impurity in a waveguide due to a “weak photon blockade” caused by the impossibility of double-occupancy and argue that this effect might be stronger for multi-photon propagation. PMID:26365761

  11. Hong-Ou-Mandel Interference with a Single Atom

    NASA Astrophysics Data System (ADS)

    Ralley, K. A.; Lerner, I. V.; Yurkevich, I. V.

    2015-09-01

    The Hong-Ou-Mandel (HOM) effect is widely regarded as the quintessential quantum interference phenomenon in optics. In this work we examine how nonlinearity can smear statistical photon bunching in the HOM interferometer. We model both the nonlinearity and a balanced beam splitter with a single two-level system and calculate a finite probability of anti-bunching arising in this geometry. We thus argue that the presence of such nonlinearity would reduce the visibility in the standard HOM setup, offering some explanation for the diminution of the HOM visibility observed in many experiments. We use the same model to show that the nonlinearity affects a resonant two-photon propagation through a two-level impurity in a waveguide due to a “weak photon blockade” caused by the impossibility of double-occupancy and argue that this effect might be stronger for multi-photon propagation.

  12. Geology and hydrocarbon potential of the Oued Mya basin, Algeria

    SciTech Connect

    Benamrane, O.; Messaoudi, M.; Messelles, H. )

    1993-09-01

    The Oued Mya hydrocarbon system is located in the Sahara basin. It is one of the best producing basins in Algeria, along with the Ghadames and Illizi basins. The stratigraphic section consists of Paleozoic and Mesozoic, and is about 5000 m thick. This intracratonic basin is limited to the north by the Toughourt saddle, and to the west and east it is flanked by regional arches, Allal-Tilghemt and Amguid-Hassi Messaoud, which culminate in the super giant Hassi Messaoud and Hassi R'mel hydrocarbon accumulations, respectively, producing oil from the Cambrian sands and gas from the Trissic sands. The primary source rock in this basin is lower Silurian shale, with an average thickness of 50 m and a total organic carbon of 6% (14% in some cases). Results of maturation modeling indicate that the lower Silurian source is in the oil window. The Ordovician shales are also source rocks, but in a second order. Clastic reservoirs are in the Trissic sequence, which is mainly fluvial deposits with complex alluvial channels, and the main target in the basin. Clastic reservoirs in the lower Devonian section have a good hydrocarbon potential east of the basin through a southwest-northwest orientation. The Late Trissic-Early Jurassic evaporites that overlie the Triassic clastic interval and extend over the entire Oued Mya basin, are considered to be a super-seal evaporite package, which consists predominantly of anhydrite and halite. For paleozoic targets, a large number of potential seals exist within the stratigraphic column. This super seal does not present oil dismigration possibilities. We can infer that a large amount of the oil generated by the Silurian source rock from the beginning of Cretaceous until now still is not discovered and significantly greater volumes could be trapped within structure closures and mixed or stratigraphic traps related to the fluvial Triassic sandstones, marine Devonian sands, and Cambrian-Ordovician reservoirs.

  13. El Sistema and American Music Education

    ERIC Educational Resources Information Center

    Lesniak, Melissa

    2012-01-01

    The brainchild of Jose Antonio Abreu, El Sistema, a music education program for aspiring orchestra musicians launched in Venezuela for students of limited means and now spreading to other parts of the world, has become a subject of interest to music teachers and teacher educators in North America. This article examines a bit of the program's…

  14. Characterization and flocculability of a novel proteoglycan produced by Talaromyces trachyspermus OU5.

    PubMed

    Fang, Di; Shi, Cuicui

    2016-01-01

    A filamentous fungus strain OU5 was isolated from a soil sample for its ability to produce rich exopolymers (EPS), with high flocculation capability towards kaolin suspension and swine wastewater, at low-carbon source conditions. EPS from strain OU5 was extracted and characterized to determine its flocculating behavior and active constituents involved in the flocculation. Strain OU5 was identified as Talaromyces trachyspermus by 18S rDNA-ITS gene sequencing and morphological observation. The extracted EPS was a novel proteoglycan (designated as BF-OU5) composed of 84.6% (w/w) polysaccharides and 15.2% (w/w) proteins. The enzymatic digestion tests revealed that the polysaccharides in BF-OU5, composed of 67% glucose, 16.4% mannose, 8.6% xylose and 8% galactose, contributed to 99.7% of flocculating capacity and were the major active ingredients in the flocculation. By contrast, the proteins in BF-OU5 only had minor roles in the flocculation. The presence of hydroxyl, amide, carboxyl and methoxyl functional groups in BF-OU5, and the high molecular weight (1.053 × 10(5)-2.970 × 10(5) Da) as well as the structure of a spherical conformation with inner pores and channels made of cross-linked netted textures contributed to the flocculation. A dosage of 20 mg/l BF-OU5 initiated more than 92.5% of flocculating efficiency towards kaolin suspension without any added coagulants; its flocculability was stable over a wide range of pH (4.0-8.0) and temperature (20°C-100°C). Treatment of swine wastewater using BF-OU5 achieved 52.1% flocculating removal for chemical oxygen demand, 39.7% for Kjeldahl nitrogen, 18.6% for NH4(+)-N, 21.5% for total phosphorus, and 75% for turbidity. PMID:26073312

  15. Dynamique sédimentaire comparative dans les bassins stéphano-permiens des Ida Ou Zal et Ida Ou Ziki, haut Atlas Occidental, MarocDynamic sedimentology of two Upper Stephano-Lower Permian basins: Ida Ou Zal and Ida Ou Ziki, western High Atlas, Morocco

    NASA Astrophysics Data System (ADS)

    Saber, H.; El-Wartiti, M.; Broutin, J.

    2001-05-01

    The intra-mountainous Ida Ou Zal Basin developed as a graben during the Stephanian (Carboniferous) and Lower Permian. Along its borders from east to west are the remnants of basal conglomerates. Passing laterally towards the centre of the basin are fine-grained fluvial-lacustrine sediments or flood-plain deposits. The important accumulation (1800 m) of sediments, associated with climatic and tectonic changes, caused substantial subsidence in a late orogenic setting. The remnants of sporadic volcanic products (shards) found in the Ida Ou Zal and the Ida Ou Zika Basins suggest nearby simultaneous magmatic activity. A comparison between the basins of Ida Ou Zal and Ida Ou Ziki suggest that the two basins formed a single unit, called the Souss Basin, ultimately terminated between the Lower Permian and Upper Permian times by a sinistral movement of the N70-80° Agadir Ou Anzizen Fault (west branch of the Tizi N'Test Fault) at the very end of the Hercynian Orogeny in Morocco.

  16. Evolución estelar en sistemas binarios

    NASA Astrophysics Data System (ADS)

    De Vito, M. A.; Benvenuto, O.

    Definición y clasificación de sistemas binarios; descripción del comportamiento del sistema frente a la variación de su masa; binarias de rayos X; transferencia de masa en sistemas binarios masivos aplicado al posible esclarecimiento del progenitor azul de la supernova SN 1987A; comentario acerca de la evolución de enanas blancas de helio de baja masa y su conexión con los sistemas binarios; reseña del trabajo de Kippenhahn y Weigert sobre el cual está basado el código evolutivo desarrollado en la FCAG por el Dr. Benvenuto y sobre el cual se trabajará para poder incluir la evolución de una estrella con pérdida de masa perteneciente a un sistema binario.

  17. The Hong-Ou-Mandel effect in the context of few-photon scattering.

    PubMed

    Longo, Paolo; Cole, Jared H; Busch, Kurt

    2012-05-21

    The Hong-Ou-Mandel effect is studied in the context of two-photon transport in a one-dimensional waveguide with a single scatterer. We numerically investigate the scattering problem within a time-dependent, wave-function-based framework. Depending on the realization of the scatterer and its properties, we calculate the joint probability of finding both photons on either side of the waveguide after scattering. We specifically point out how Hong-Ou-Mandel interferometry techniques could be exploited to identify effective photon-photon interactions which are mediated by the scatterer. The Hong-Ou-Mandel dip is discussed in detail for the case of a single two-level atom embedded in the waveguide, and dissipation and dephasing are taken into account by means of a quantum jump approach. PMID:22714220

  18. PHYSICAL MAPS OF 'AUTOGRAPHA CALIFORNICA' AND 'RACHIPLUSIA OU' NUCLEAR POLYHEDROSIS VIRUS RECOMBINANTS

    EPA Science Inventory

    TN-368 cells were infected simultaneously with the closely related Autographa californica (AcMNPV) and Rachiplusia ou (RoMNPV) nuclear polyhedrosis viruses. Progeny viral isolates were plaque purified, and their DNAs were analyzed with restriction endonucleases. Of 100 randomly c...

  19. FIELD SCALE EVALUATION OF TREATMENT OF TCE IN A BIOWALL AT THE OU-1 SITE

    EPA Science Inventory

    A passive reactive barrier (Biowall) was installed at the OU-1 site at Altus Air Force Base, Oklahoma to treat TCE contamination in ground water from a landfill. Depth to ground water varies from 1.8 to 2.4 meters below land surface. To intercept and treat the plume of contamin...

  20. Gas physical conditions and kinematics of the giant outflow Ou4

    NASA Astrophysics Data System (ADS)

    Corradi, Romano L. M.; Grosso, Nicolas; Acker, Agnès; Greimel, Robert; Guillout, Patrick

    2014-10-01

    Context. The recently discovered bipolar outflow Ou4 has a projected size of more than one degree in the plane of the sky. It is apparently centred on the young stellar cluster - whose most massive representative is the triple system HR 8119 - inside the H ii region Sh 2-129. The driving source, the nature, and the distance of Ou4 are not known. Aims: The basic properties of Ou4 and its environment are investigated to shed light on the origin of this remarkable outflow. Methods: Deep narrow-band imagery of the whole nebula at arcsecond resolution was obtained to study the details of its morphology. Long-slit spectroscopy of the bipolar lobe tips was secured to determine the gas ionisation mechanism, physical conditions, and line-of-sight velocities. An estimate of the proper motions at the tip of the south lobe using archival plate images was attempted. The existing multi-wavelength data for Sh 2-129 and HR 8119 were also comprehensively reviewed. Results: The observed morphology of Ou4, its emission-line spatial distribution, line flux ratios, and the kinematic modelling developed adopting a bow-shock parabolic geometry, illustrate the expansion of a shock-excited fast collimated outflow. The observed radial velocities of Ou4 and its reddening are consistent with those of Sh 2-129 and HR 8119. The improved determination of the distance to HR 8119 (composed of two B0 V and one B0.5 V stars) and Sh 2-129 is 712 pc. We identify in WISE images at 22 μm an emission bubble of 5' radius (1 pc at the distance above) emitted by hot (107 K) dust grains, located inside the central part of Ou4 and corresponding to several [O iii] emission features of Ou4. Conclusions: The apparent position of Ou4 and the properties studied in this work are consistent with the hypothesis that Ou4 is located inside the Sh 2-129 H ii region, suggesting that it was launched some 90 000 yr ago by HR 8119. The outflow total kinetic energy is estimated to be ≈4 × 1047 ergs. However, we cannot

  1. Nuevos sistemas de frecuencia intermedia para el IAR

    NASA Astrophysics Data System (ADS)

    Olalde, J. C.; Perilli, D.; Larrarte, J. J.

    Se presenta el diagrama en bloques de los nuevos sistemas de Frecuencia Intermedia para los dos radiómetros instalados en el IAR. Entre las características más importantes del sistema podemos mencionar la posibilidad de conectar cualquiera de las dos antenas a los ``backend" disponibles: analizador espectral de alta resolución (META II) de 0,05 Hz, autocorrelador de 1008 canales y contínuo. Se incorporan al sistema nuevos sintetizadores de frecuencia implementados con PLL y la moderna técnica de síntesis digital directa. Por último, el conjunto del sistema es susceptible de ser configurado por las computadoras de adquisición de datos, supervisadas por otra, que entrega el estado de funcionamiento actual y evita la selección de configuraciones incorrectas por parte del usuario.

  2. Spectral correlation measurements at the Hong-Ou-Mandel interference dip

    NASA Astrophysics Data System (ADS)

    Gerrits, T.; Marsili, F.; Verma, V. B.; Shalm, L. K.; Shaw, M.; Mirin, R. P.; Nam, S. W.

    2015-01-01

    We present an efficient tool capable of measuring the spectral correlations between photons emerging from a Hong-Ou-Mandel interferometer. We show that for our spectrally factorizable spontaneous down-conversion source, the Hong-Ou-Mandel interference visibility decreases as the photons' frequency spread is increased to a maximum of 165 nm. Unfiltered, we obtained a visibility of 92.0 %±0.2 %. The maximum visibility was 97 %±0.2 % after applying filtering. We show that the tool can be useful for the study of spectral correlations that impair high-visibility and high-fidelity multisource interference applications. The nature of this tool also allows for arbitrary post-selective spectral filtering and high-rate multiphoton spectral correlation measurements.

  3. Sistemas Correctores de Campo Para EL Telescopio Cassegrain IAC80

    NASA Astrophysics Data System (ADS)

    Galan, M. J.; Cobos, F. J.

    1987-05-01

    El proyecto de instrumentación de mayor importancia que ha tenido el Instituto de Astrofisica de Canarias en los últimos afios ha sido el diseflo y construcción del te1escopio IAC8O. Este requería del esfuerzo con junto en mec´nica, óptica y electrónica, lo que facilitó la estructuración y el crecimiento de los respectivos grupos de trabajo, que posteriormente se integraron en departamentos En su origen (1977), el telescopio IAC80 fue concebido como un sistema clásico tipo Cassegrain, con una razón focal F/i 1.3 para el sistema Casse grain y una razón focal F/20 para el sistema Coudé. Posteriormente, aunque se mantuvo la filosofia de que el sistema básico fuera el F/11.3, se consideró conveniente el diseño de secundarios para razones focales F/16 y F/32, y se eliminó el de F/20. Sin embargo, dada la importancia relativa que un foco estrictamente fotográfico tiene en un telescopio moderno, diseñado básicamente para fotometría fotoeléctrica y con un campo util mínimamente de 40 minutos de arco, se decídió Ilevar a cabo el diseño de un secundario F/8 con un sistema corrector de campo, pero que estuviera formado únicamente por lentes con superficies esféricas para que asl su construcción fuera posible en España ó en México. La creciente utilización de detectores bidimensionales para fines de investigación astron6mica y la viabilidad de que en un futuro cercano éstos tengan un área sensible cada vez mayor, hicieron atractiva la idea de tener diseñado un sistema corrector de campo para el foco primario (F/3), con un campo útil mínimo de un grado, y también con la limitante de que sus componentes tuvieron sólamente supérficies esféricas. Ambos diseños de los sis-temas correctores de campo se llevaron a cabo, en gran medida, como parte de un proyecto de colaboración e intercambio en el área de diseño y evaluación de sistemas ópticos.

  4. El problema de estabilidad de los sistemas Hamiltonianos multidimensionales

    NASA Astrophysics Data System (ADS)

    Cincotta, P. M.

    Se revisarán los aspectos básicos del problema de estabilidad de sistemans Hamiltonianos N-dimensionales, haciendo especial énfasis en los posibles mecanismos que dan lugar a la aparición de ``caos": overlap de resonancias, difusión de Arnol'd y otros procesos difusivos alternativos. Se mencionarán los aspectos aún no resueltos sobre la estabilidad de los sistemas con N > 2. Finalmente, se discutirá cuáles de estos mecanismos podrían tener alguna relevancia en la dinámica de sistemas estelares y planetarios.

  5. Sistemas de cúmulos globulares extragalácticos

    NASA Astrophysics Data System (ADS)

    Forte, J. C.

    Se describen las características de los sistemas de cúmulos globulares asociados a galaxias elípticas en una variedad de medios y, en particular, aquellas vinculadas con la distribución espacial, frecuencia específica y composición química. Esta discusión se hace dentro de un conjunto de esquemas orientados a explicar las primeras fases de la formación de las galaxias dominantes en cúmulos y del rol de los sistemas de cúmulos globulares en esos procesos.

  6. Nonlinear optical effects and Hong-Ou-Mandel interference in cavity quantum electrodynamics

    NASA Astrophysics Data System (ADS)

    Mirza, Imran M.; van Enk, Steven J.

    Pure quantum interference among single photons is one of the key ingredients to perform linear optics quantum computation (LOQC). The Hong-Ou-Mandel interference (HOMI) [C. K. Hong, Z. Y. Ou and L. Mandel, Phys. Rev. Lett. 59, (18), 2044-2046 (1987)] i.e. complete destructive interference between two identical and indistinguishable photons simultaneously entering input ports of a 50/50 beam splitter, is a well-known example in this context. In this talk, I'll present our theoretical study of HOMI in a coupled Jaynes-Cummings array. In particular and by applying quantum jump/trajectory formalism, I'll focus on how partial quantum interference between two photons survive both non-linearities produced by two-level emitter and spectral filtering due to optical cavities in our coupled cavity array setup [Imran M. Mirza and Steven J. van Enk, Opt. Comm. 343, 172-177 (2015)]. Along with LOQC, this work is crucial from the perspective of exploiting coupled cavity arrays to store single photons reliably (without altering their temporal and spectral traits) [Imran M. Mirza, Steven J. van Enk and Jeff Kimble, JOSA B, 10, 2640-2649, (2013)].

  7. Water quality assessment of a highly polluted Mediterranean River - Oued Fez (Morocco)

    NASA Astrophysics Data System (ADS)

    Perrin, J.-L.; Bellarbi, M.; Raïs, N.; Chahinian, N.; Moulin, P.; Ijjaali, M.

    2012-04-01

    In the South of the Mediterranean basin, many rivers are characterized by an alternation of very long dry periods only cut by short flood events. Currently, the socio-economical development of these zones is limited by water scarcity and poor quality of the water resources. Indeed human activities, generally concentrated in overpopulated cities, generate large quantity of domestic and industrial effluents which are directly rejected in the environment without any treatment. In Morocco, the well known city of Fez illustrates perfectly this situation, observed in most developing countries. The oued Fez receives continuously the non-treated domestic and industrial effluents (90.000 m3/day) of the city and pollutes all the downstream water bodies. Indeed, it is a tributary of the Sebou River, a major body of great economical importance used for irrigation and freshwater supply. This study aims at characterising and quantifying the pollutant concentrations and fluxes in various points of oued Fez's hydrological network and assessing its impact on the Sebou River; this river's preservation being considered a national priority in Morocco. A coupled water quality-water quantity monitoring scheme has been implemented on oued Fez since 2008. In addition to basic hydrological data, water quality samples are collected at regular intervals at 8 locations where discharge is simultaneously measured using an Acoustic Doppler Current Profiler (ADCP). Water samples are analysed for different forms of nitrogen (nitrates, nitrites, ammonium and total nitrogen), phosphorus (soluble reactive phosphorus and total phosphorus) but also total chromium which is used in the leather tanning processes, one of the most important industrial production of the city of Fez, using a photospectrometer (Hach Lange DR 2800 VIS-photometer (Germany). The results of 17 sampling campaigns, carried out over 3 hydrological years, indicate that the rural areas contribute mostly to baseflow during the wet

  8. The Story of Carora: The Origins of El Sistema

    ERIC Educational Resources Information Center

    Carlson, Alexandra

    2016-01-01

    Venezuela's youth symphony program, the Fundación Musical Simón Bolívar, commonly referred to as "El Sistema," combines musical achievement with learning important life skills through orchestral practice and performance. Although the history most commonly reported outside Venezuela is of the program's director, José Antonio Abreu,…

  9. Measurement of photon indistinguishability to a quantifiable uncertainty using a Hong-Ou-Mandel interferometer

    SciTech Connect

    Thomas, Peter J.; Cheung, Jessica Y.; Chunnilall, Christopher J.; Dunn, Malcolm H.

    2010-04-10

    We present a method for using the Hong-Ou-Mandel (HOM) interference technique to quantify photon indistinguishability within an associated uncertainty. The method allows the relative importance of various experimental factors affecting the HOM visibility to be identified, and enables the actual indistinguishability, with an associated uncertainty, to be estimated from experimentally measured quantities. A measurement equation has been derived that accounts for the non-ideal performance of the interferometer. The origin of each term of the equation is explained, along with procedures for their experimental evaluation and uncertainty estimation. These uncertainties are combined to give an overall uncertainty for the derived photon indistinguishability. The analysis was applied to measurements from an interferometer sourced with photon pairs from a parametric downconversion process. The measured photon indistinguishably was found to be 0.954+/-0.036 by using the prescribed method.

  10. Interactions and Charge Fractionalization in an Electronic Hong-Ou-Mandel Interferometer

    NASA Astrophysics Data System (ADS)

    Wahl, Claire; Rech, Jérôme; Jonckheere, Thibaut; Martin, Thierry

    2014-01-01

    We consider an electronic analog of the Hong-Ou-Mandel (HOM) interferometer, where two single electrons travel along opposite chiral edge states and collide at a quantum point contact. Studying the current noise, we show that because of interactions between copropagating edge states, the degree of indistinguishability between the two electron wave packets is dramatically reduced, leading to reduced contrast for the HOM signal. This decoherence phenomenon strongly depends on the energy resolution of the packets. Insofar as interactions cause charge fractionalization, we show that charge and neutral modes interfere with each other, leading to satellite dips or peaks in the current noise. Our calculations explain recent experimental results [E. Bocquillon, et al., Science 339, 1054 (2013)] where an electronic HOM signal with reduced contrast was observed.

  11. Multiparticle Correlations in Mesoscopic Scattering: Boson Sampling, Birthday Paradox, and Hong-Ou-Mandel Profiles

    NASA Astrophysics Data System (ADS)

    Urbina, Juan-Diego; Kuipers, Jack; Matsumoto, Sho; Hummel, Quirin; Richter, Klaus

    2016-03-01

    The interplay between single-particle interference and quantum indistinguishability leads to signature correlations in many-body scattering. We uncover these with a semiclassical calculation of the transmission probabilities through mesoscopic cavities for systems of noninteracting particles. For chaotic cavities we provide the universal form of the first two moments of the transmission probabilities over ensembles of random unitary matrices, including weak localization and dephasing effects. If the incoming many-body state consists of two macroscopically occupied wave packets, their time delay drives a quantum-classical transition along a boundary determined by the bosonic birthday paradox. Mesoscopic chaotic scattering of Bose-Einstein condensates is, then, a realistic candidate to build a boson sampler and to observe the macroscopic Hong-Ou-Mandel effect.

  12. Interactions between the hydrology and hydrochemistry of an intermittent southern Mediterranean River- Oued Fez (Morocco)

    NASA Astrophysics Data System (ADS)

    Perrin, J.-L.; Bellarbi, M.; Chahinian, N.; Raïs, N.; Moulin, P.; Ijjaali, M.

    2012-04-01

    Mediterranean catchments are often characterized by highly variable rainfall inputs and intermittent flows. In comparison to the existing knowledge on their hydrological behaviour, the interactions between flow conditions and pollution levels remain less documented. This study aims at filling that gap through a case study on Oued Fez (Morocco). Oued Fez is an intermittent river located in central-eastern Morocco. It has a 615 km2 catchment 10% of which corresponds to the city of Fez, the 3rd biggest in the kingdom (1.2 M inhabitants). Oued Fes is a tributary of the Sebou River, a major body of great economical importance used for irrigation and freshwater supply. A coupled water quality-water quantity monitoring scheme has been implemented on Oued Fez since 2008. In addition to basic hydrological data, water quality samples are collected at regular intervals at 8 locations where discharge is simultaneously measured using an Acoustic Doppler Current Profiler (ADCP). Water samples are analysed for different forms of nitrogen (nitrates, nitrites, ammonium and total nitrogen) and phosphorus (soluble reactive phosphorus and total phosphorus) using a photospectrometer (Hach Lange DR 2800 VIS-photometer (Germany). The results of the study indicate that, despite variations in annual rainfall, the catchment's hydrological response is controlled by the urban impervious zones during floods. The rural areas contribute mostly to baseflow during the wet period while non-treated anthropogenic inputs constitute most of the flow during the dry period. This in turn affects the water quality results. Indeed: - during low flow conditions the pollution levels are very high and total nitrogen and total phosphorus concentrations reach 45 mg/l N and 6.5 mg/l P respectively at the most polluted sites. - during average and high flow conditions the pollution levels decrease due to dilution. Total nitrogen and total phosphorus concentrations reach 32 mg/l N and 3.5 mg/l P respectively with

  13. Hong-Ou-Mandel experiment for temporal investigation of single-electron fractionalization

    PubMed Central

    Freulon, V.; Marguerite, A.; Berroir, J.-M.; Plaçais, B.; Cavanna, A.; Jin, Y.; Fève, G.

    2015-01-01

    Coulomb interaction has a striking effect on electronic propagation in one-dimensional conductors. The interaction of an elementary excitation with neighbouring conductors favours the emergence of collective modes, which eventually leads to the destruction of the Landau quasiparticle. In this process, an injected electron tends to fractionalize into separated pulses carrying a fraction of the electron charge. Here we use two-particle interferences in the electronic analogue of the Hong-Ou-Mandel experiment in a quantum Hall conductor at filling factor 2 to probe the fate of a single electron emitted in the outer edge channel and interacting with the inner one. By studying both channels, we analyse the propagation of the single electron and the generation of interaction-induced collective excitations in the inner channel. These complementary pieces of information reveal the fractionalization process in the time domain and establish its relevance for the destruction of the quasiparticle, which degrades into the collective modes. PMID:25896625

  14. Hong-Ou-Mandel atom interferometry in tunnel-coupled optical tweezers

    NASA Astrophysics Data System (ADS)

    Lester, Brian; Kaufman, Adam; Reynolds, Collin; Wall, Michael; Foss-Feig, Michael; Hazzard, Kaden; Rey, Ana Maria; Regal, Cindy

    2014-05-01

    We present recent work in which we demonstrate near-complete control over all the internal and external degrees of freedom of laser-cooled 87Rb atoms trapped in sub-micron optical tweezers. Utilizing this control for two atoms in two optical tweezers, we implement a massive-particle analog of the Hong-Ou-Mandel interferometer where atom tunneling plays the role of the photon beamsplitter. The interferometer is used to probe the effect of atomic indistinguishability on the two-atom dynamics for a variety of initial conditions. These experiments demonstrate the viability of the optical tweezer platform for bottom-up generation of low-entropy quantum systems and pave the way toward the direct observation of quantum dynamics in more complex finite-sized systems.

  15. Laser cooling atoms to indistinguishability: Atomic Hong-Ou-Mandel interference and entanglement through spin exchange

    NASA Astrophysics Data System (ADS)

    Kaufman, Adam

    2016-05-01

    Motional control of neutral atoms has a rich history and increasingly interest has turned to single-atom control. In my thesis work, we created a platform to individually prepare single bosonic atoms in highly pure quantum states, by developing methods to laser cool single atoms to the vibrational ground state of optical tweezer traps. Applying this toolset, we observe the atomic Hong-Ou-Mandel effect when we arrange for atom tunneling to play the role of a balanced beam splitter between two optical tweezers. In another experiment, we utilize spin exchange to create entanglement, which we then verify after spatially separating the atoms to observe their non-local correlations. Merging these results with our recent demonstration of deterministic loading of atomic arrays, our results establish the concept of quantum gas assembly, which could be applied to a variety of systems ranging from the production of single dipolar molecules to the assembly of low-entropy arrays of atoms.

  16. Hong-Ou-Mandel interference of two phonons in trapped ions

    NASA Astrophysics Data System (ADS)

    Toyoda, Kenji; Hiji, Ryoto; Noguchi, Atsushi; Urabe, Shinji

    2015-11-01

    The quantum statistics of bosons and fermions manifest themselves in the manner in which two indistinguishable particles interfere quantum mechanically. When two photons, which are bosonic particles, enter a beam-splitter with one photon in each input port, they bunch together at either of the two output ports. The corresponding disappearance of the coincidence count is the Hong-Ou-Mandel effect. Here we show the phonon counterpart of this effect in a system of trapped-ion phonons, which are collective excitations derived by quantizing vibrational motions that obey Bose-Einstein statistics. We realize a beam-splitter transformation of the phonons by employing the mutual Coulomb repulsion between ions, and perform a two-phonon quantum interference experiment using that transformation. We observe an almost perfect disappearance of the phonon coincidence between two ion sites, confirming that phonons can be considered indistinguishable bosonic particles. The two-particle interference demonstrated here is purely a quantum effect, without a classical counterpart, hence it should be possible to demonstrate the existence of entanglement on this basis. We attempt to generate an entangled state of phonons at the centre of the Hong-Ou-Mandel dip in the coincidence temporal profile, under the assumption that the entangled phonon state is successfully generated if the fidelity of the analysis pulses is taken into account adequately. Two-phonon interference, as demonstrated here, proves the bosonic nature of phonons in a trapped-ion system. It opens the way to establishing phonon modes as carriers of quantum information in their own right, and could have implications for the quantum simulation of bosonic particles and analogue quantum computation via boson sampling.

  17. The different origins of magnetic fields and activity in the Hertzsprung gap stars, OU Andromedae and 31 Comae

    NASA Astrophysics Data System (ADS)

    Borisova, A.; Aurière, M.; Petit, P.; Konstantinova-Antova, R.; Charbonnel, C.; Drake, N. A.

    2016-06-01

    Context. When crossing the Hertzsprung gap, intermediate-mass stars develop a convective envelope. Fast rotators on the main sequence, or Ap star descendants, are expected to become magnetic active subgiants during this evolutionary phase. Aims: We compare the surface magnetic fields and activity indicators of two active, fast rotating red giants with similar masses and spectral class but different rotation rates - OU And (Prot = 24.2 d) and 31 Com (Prot = 6.8 d) - to address the question of the origin of their magnetism and high activity. Methods: Observations were carried out with the Narval spectropolarimeter in 2008 and 2013. We used the least-squares deconvolution (LSD) technique to extract Stokes V and I profiles with high signal-to-noise ratio to detect Zeeman signatures of the magnetic field of the stars. We then provide Zeeman-Doppler imaging (ZDI), activity indicators monitoring, and a precise estimation of stellar parameters. We use state-of-the-art stellar evolutionary models, including rotation, to infer the evolutionary status of our giants, as well as their initial rotation velocity on the main sequence, and we interpret our observational results in the light of the theoretical Rossby numbers. Results: The detected magnetic field of OU Andromedae (OU And) is a strong one. Its longitudinal component Bl reaches 40 G and presents an about sinusoidal variation with reversal of the polarity. The magnetic topology of OU And is dominated by large-scale elements and is mainly poloidal with an important dipole component, as well as a significant toroidal component. The detected magnetic field of 31 Comae (31 Com) is weaker, with a magnetic map showing a more complex field geometry, and poloidal and toroidal components of equal contributions. The evolutionary models show that the progenitors of OU And and 31 Com must have been rotating at velocities that correspond to 30 and 53%, respectively, of their critical rotation velocity on the zero age main sequence

  18. El Sistema de Referencia Celeste convencional de la IAU

    NASA Astrophysics Data System (ADS)

    Arias, E. F.

    La Unión Astronómica Internacional (IAU) recomendó la adopción de un nuevo sistema de referencia celeste baricéntrico cuyo plano fundamental y origen de ascensiones rectas estén próximos, respectivamente, al ecuador y equinoccio dinámicos J2000.0. El nuevo sistema de referencia estará materializado por las posiciones J2000.0 de radiofuentes extragalácticas determinadas con la técnica de interferometría de larga línea de base (VLBI). El Working Group on Reference Frames de la IAU (WGRF) decidió adoptar (Grasse, 1995) al sistema de referencia celeste extragaláctico del Servicio Internacional de la Rotación Terrestre (IERS) como futuro sistema de referencia celeste convencional bajo el nombre International Celestial Reference System (ICRS) y encomendó su mantenimiento futuro al IERS. El marco de referencia que materializará al ICRS contiene posiciones precisas J2000.0 de más de 600 radiofuentes extragalácticas. Las coordenadas fueron ajustadas en una única solución VLBI en la cual se incluyeron todas las observaciones realizadas hasta octubre de 1995 con la técnica de adquisición de datos VLBI Mark III. Para minimizar los errores sistemáticos que pueden afectar la calidad del marco de referencia se introdujeron mejoras sustanciales en la modelización y en la selección de datos. Un subconjunto de objetos del marco de referencia se utilizó para referir las posiciones estelares determinadas con el satélite astrométrico Hipparcos al ICRS.

  19. L’identification et traitement du trouble panique avec ou sans agoraphobie

    PubMed Central

    Foldes-Busque, Guillaume; Marchand, André; Landry, Pierre

    2007-01-01

    RÉSUMÉ OBJECTIF Renseigner les médecins de première ligne au sujet de l’identification précoce, du diagnostic et du traitement du trouble panique avec ou sans agoraphobie (TP/A). QUALITÉ DES DONNÉES Les données et recommandations présentées proviennent d’une recension des écrits scientifiques réalisée via les banques de données PsycLIT, PsyINFO et MEDLINE (1985 à 2006) en utilisant les descripteurs panic disorder, psychotherapy, psychosocial treatment, treatment et pharmacotherapy. Les recommandations formulées par les auteurs s’appuient sur des données probantes provenant d’études d’excellente qualité. Les informations concernant le diagnostic et l’évaluation du TP/A proviennent d’études épidémiologiques récentes, de consensus et d’opinions d’experts. PRINCIPAL MESSAGE Le TP/A est un trouble psychiatrique souvent rencontré en médecine de première ligne, mais il est fréquemment sous-diagnostiqué et sous-traité. L’identification précoce de ce trouble demande une attention particulière aux symptômes médicalement inexpliqués et, le cas échéant, le médecin doit utiliser des questions spécifiques permettant d’identifier d’éventuelles attaques de panique et de cerner leur signification pour le patient. Le traitement de premier choix pour ce trouble est une psychothérapie d’orientation cognitivo-comportementale administrée par un psychologue ou un psychiatre spécialisé. Si de telles ressources ne sont pas disponibles, le médecin peut opter pour un traitement psychopharmacologique. CONCLUSION Les médecins de famille peuvent jouer un rôle central dans l’identification et le traitement des patients souffrant d’un TP/A. PMID:17934032

  20. Landslide susceptibility modelling using Fuzzy Logic in the oued Larbaa basin (Oriental Rif, Morocco)

    NASA Astrophysics Data System (ADS)

    Zezere, J. L.; Sadiki, A.; Faleh, A.; Elkoulali, E.; Garcia, R. A. C.; Oliveira, S. C.

    2009-04-01

    Together with flash floods and soil erosion, landslides are relevant natural hazards that affect marly slopes in the oued Larbaa basin, located in the Oriental Rif, Morocco. Landslides have been generated important economic, social and ecological effects, by the destruction of farming lands, and by the collapse and interruption of roads and other human infrastructures (e.g., houses). The reduction of socio-economic losses due to landslide activity needs to be accomplished through the implementation of a comprehensive mitigation landslide risk program. The first task of this program is the definition of landslide susceptible areas based on the study of relationships between spatial distribution of past landslides and the cartographic set of landslide predisposing factors. Therefore, the major aim of this work is to create a landslide susceptibility map for the study area. The oued Larbaa basin, located northwards the Taza city, has an area of 245 km2 and the elevation ranges between 450 m and 1300 m. Morphology is characterized by rounded hills cutting marly formations essentially of Cretaceous age. Land use is dominated by cereal cultures and a few sparse tree plantations. Natural vegetation shows a very high level of degradation and usually appears as shrub tufts. The inventory of instability events has been made for the study area and it includes both rainfall-triggered rotational and shallow translational slides. These landslides were included into a GIS database that comprises also the following landslide predisposing factors: slope angle, aspect and curvature, inverse wetness index, lithology and land use. The susceptibility assessment was carried out for each type of landslide (rotational slides and shallow translational slides) under the assumption that future landslides will occur under the same environmental patterns that generated landslides in the past. The modelling of landslide susceptibility was made using the Fuzzy Logic method (Fuzzy Algebraic

  1. Matter-wave quantum interference in the Hong-Ou-Mandel setup

    NASA Astrophysics Data System (ADS)

    Lewis-Swan, Robert; Kheruntsyan, Karen

    2014-05-01

    We propose an experiment to realize a matter-wave analog of the optical Hong-Ou-Mandel (HOM) effect. This is achieved by utilizing a pair of colliding Bose-Einstein condensates of ultracold atoms to generate a scattering halo of pair-correlated atoms via spontaneous four-wave mixing, analogous to optical parametric down-conversion used in the optical experiment to generate pairs of indistinguishable photons. Coupling the pair-correlated atoms by a π and π / 2 Bragg pulse realises the atom-optics analogs of mirror and beam-splitter elements of the optical HOM interferometer. We use a stochastic (positive- P representation) Bogoliubov approach to simulate the full dynamics of the experiment and by proposing a measurement protocol appropriate for the multimode nature of the scattering halo we predict a HOM-dip visibility of ~ 69 %, indicating strong quantum correlations between the scattered atoms and paves the way for a possible demonstration of a Bell inequality violation with matter-waves in a related Rarity-Tapster setup.

  2. Hong-Ou-Mandel interference with two independent weak coherent states

    NASA Astrophysics Data System (ADS)

    Hua, Chen; Xue-Bi, An; Juan, Wu; Zhen-Qiang, Yin; Shuang, Wang; Wei, Chen; Zhen-Fu, Han

    2016-02-01

    Recently, the Hong-Ou-Mandel (HOM) interference between two independent weak coherent pulses (WCPs) has been paid much attention due to the measurement-device-independent (MDI) quantum key distribution (QKD). Using classical wave theory, articles reported before show that the visibility of this kind of HOM-type interference is ≤ 50%. In this work, we analyze this kind of interference using quantum optics, which reveals more details compared to the wave theory. Analyses confirm the maximum visibility of 50%. And we conclude that the maximum visibility of 50% comes from the two single-photon states in WCPs, without considering the noise. In the experiment, we successfully approach the visibility of 50% by using WCPs splitting from the single pico-second laser source and phase scanning. Since this kind of HOM interference is immune to slow phase fluctuations, both the realized and proposed experiment designs can provide stable ways of high-resolution optical distance detection. Project supported by the National Basic Research Program of China (Grants Nos. 2011CBA00200 and 2011CB921200), the National Natural Science Foundation of China (Grant Nos. 61201239, 61205118, 11304397, and 61475148) and the “Strategic Priority Research Program (B)” of the Chinese Academy of Sciences (Grant No. XDB01030100 and XDB01030300).

  3. Integrated quantum photonic sensor based on Hong-Ou-Mandel interference.

    PubMed

    Basiri-Esfahani, Sahar; Myers, Casey R; Armin, Ardalan; Combes, Joshua; Milburn, Gerard J

    2015-06-15

    Photonic-crystal-based integrated optical systems have been used for a broad range of sensing applications with great success. This has been motivated by several advantages such as high sensitivity, miniaturization, remote sensing, selectivity and stability. Many photonic crystal sensors have been proposed with various fabrication designs that result in improved optical properties. In parallel, integrated optical systems are being pursued as a platform for photonic quantum information processing using linear optics and Fock states. Here we propose a novel integrated Fock state optical sensor architecture that can be used for force, refractive index and possibly local temperature detection. In this scheme, two coupled cavities behave as an "effective beam splitter". The sensor works based on fourth order interference (the Hong-Ou-Mandel effect) and requires a sequence of single photon pulses and consequently has low pulse power. Changes in the parameter to be measured induce variations in the effective beam splitter reflectivity and result in changes to the visibility of interference. We demonstrate this generic scheme in coupled L3 photonic crystal cavities as an example and find that this system, which only relies on photon coincidence detection and does not need any spectral resolution, can estimate forces as small as 10(-7) Newtons and can measure one part per million change in refractive index using a very low input power of 10(-10)W. Thus linear optical quantum photonic architectures can achieve comparable sensor performance to semiclassical devices. PMID:26193575

  4. Prise en Charge du Syndrome de Lyell ou Necrolyse Epidermique Toxique

    PubMed Central

    Siah, S.; Baite, A.; Bakkali, H.; Atmani, M.; Ababou, K.; Ihrai, H.

    2009-01-01

    Summary Le syndrome de Lyell ou nécrolyse épidermique toxique (NET) est une pathologie très grave des dermatoses bulleuses d'étiologie médicamenteuse. Il se caractérise par une nécrose aiguë de l'épiderme sur toute la hauteur du corps muqueux. L'aspect clinique de la NET est celui d'une brûlure étendue du deuxième degré profond. A ce tableau s'associent constamment des lésions muqueuses et une atteinte multiviscérale qui aggrave le pronostic. Nous rapportons deux cas de NET qui illustrent l'importance d'une prise en charge précoce et multidisciplinaire de ces patients atteints au sein d'un service de réanimation des brûlés, dont les fondements reposent sur l'asepsie rigoureuse, l'apport hydroélectrolytique et nutritionnel, la prévention de l'infection et son traitement par une antibiothérapie adaptée, et un nursing et des soins locaux. L'efficacité supposée des immunoglobulines intraveineuses ne repose que sur des cas isolés et il n'y a pas encore d'études randomisées. PMID:21991170

  5. Hong-Ou-Mandel Interference with Atomic Many-Body States

    NASA Astrophysics Data System (ADS)

    Islam, Rajibul; Lukin, Alexander; Ma, Ruichao; Preiss, Philipp; Rispoli, Matthew; Tai, M. Eric; Greiner, Markus

    2015-05-01

    Hong-Ou-Mandel (HOM) interference experiments are a powerful probe for the indistinguishability and underlying quantum statistics of particles. In the classic HOM experiment, a pair of identical photons incident on different input ports of a beamsplitter exits via the same output port. Using the precise control and readout afforded by our quantum gas microscope, we present an implementation of this classic experiment using massive bosons in a doublewell optical potential. Identical states are prepared on each site of the doublewell and by lowering the tunnel coupling between the sites for specific times, we drive a beam splitter operation between the sites. For single-atom Fock input states, we have realized a high fidelity beamsplitter operation and observed an HOM interference contrast of >90%. By generalizing to more complex initial states on the input ports, we have been able to establish HOM experiment protocols as a robust approach towards studying the indistinguishability of many-body states as well as probe interaction-induced effects. These techniques open a path towards the measurement of purity in a quantum system and entanglement entropy in many-body states.

  6. Electronic Hong-Ou-Mandel interferometry in two-dimensional topological insulators

    NASA Astrophysics Data System (ADS)

    Ferraro, D.; Wahl, C.; Rech, J.; Jonckheere, T.; Martin, T.

    2014-02-01

    The edge states of a two-dimensional topological insulator are characterized by their helicity, a very remarkable property which is related to the time-reversal symmetry and the topology of the underlying system. We theoretically investigate a Hong-Ou-Mandel-type setup as a tool to probe it. Collisions of two electrons with the same spin show a Pauli dip, analogous to the one obtained in the integer quantum Hall case. Moreover, the collisions between electrons of opposite spin also lead to a dip, known as Z2 dip, which is a direct consequence of the constraints imposed by time-reversal symmetry. In contrast to the integer quantum Hall case, the visibility of these dips is reduced by the presence of the additional edge channels, and crucially depends on the properties of the quantum point contact. As a unique feature of this system, we show the possibility of three-electron interference, which leads to a total suppression of the noise independently of the point contact configuration. This is assured by the peculiar interplay between Fermi statistics and topology. This work intends to extend the domain of applicability of electron quantum optics.

  7. Intercomparison of Groundwater Flow Monitoring Technologies at Site OU 1, Former Fort Ord, California

    SciTech Connect

    Daley, P F; Jantos, J; Pedler, W H; Mandell, W A

    2005-09-20

    This report presents an intercomparison of three groundwater flow monitoring technologies at a trichloroethylene (TCE) groundwater plume at Operational Unit 1 (OU 1) adjacent to the former Fritzsche Army Airfield at the former Fort Ord Army Base, located on Monterey Bay in northern Monterey County, California. Soil and groundwater at this site became contaminated by fuels and solvents that were burned on a portion of OU 1 called the Fire Drill Area (FDA) as part of firefighter training from 1962 and 1985. Cont Contamination is believed to be restricted to the unconfined A-aquifer, where water is reached at a depth of approximately 60 to 80 feet below the ground surface; the aquifer is from 15 to 20 feet in thickness, and is bounded below by a dense clay layer, the Salinas Valley Aquitard. Soil excavation and bioremediation were initiated at the site of fire training activities in the late 1980s. Since that time a pump-and-treat operation has been operated close to the original area of contamination, and this system has been largely successful at reducing groundwater contamination in this source area. However, a trichloroethylene (TCE) groundwater plume extends approximately 3000 ft (900 m) to the northwest away from the FDA. In this report, we have augmented flow monitoring equipment permanently installed in an earlier project (Oldenburg et al., 2002) with two additional flow monitoring devices that could be deployed in existing monitoring wells, in an effort to better understand their performance in a nearly ideal, homogeneous sand aquifer, that we expected would exhibit laminar groundwater flow owing to the site's relatively simple hydrogeology. The three flow monitoring tools were the Hydrotechnics{reg_sign} In In-Situ Permeable Flow Sensor (ISPFS), the RAS Integrated Subsurface Evaluation Hydrophysical Logging tool (HPL), and the Lawrence Livermore National Laboratory Scanning Colloidal Borescope Flow Meter (SCBFM). All three devices produce groundwater flow

  8. Hatching Plans: Pedagogy and Discourse within an El Sistema-Inspired Music Program

    ERIC Educational Resources Information Center

    Dobson, Nicolas

    2016-01-01

    In this article, I draw on my experience as an instrumental tutor with a music program inspired by and explicitly linked to El Sistema, to explore new perspectives on Sistema-based pedagogy and management. Detailed ethnographic description of an orchestral session provides a first-hand account of the program's pedagogy, which I then contextualize…

  9. Resurrection Symphony: "El Sistema" as Ideology in Venezuela and Los Angeles

    ERIC Educational Resources Information Center

    Fink, Robert

    2016-01-01

    The explosive growth of Venezuela's "El Sistema" is rewriting the agenda of musical education in the West. Many commentators from the world of classical music react to the spectacle of dedicated young colonial musicians playing European masterworks as a kind of "miracle," accepting "Sistema" founder José Antonio…

  10. Lifting the Veil: A Realist Critique of Sistema's Upwardly Mobile Path

    ERIC Educational Resources Information Center

    Logan, Owen

    2016-01-01

    El Sistema sits somewhere between a social project and a classical music initiative. However, its promise of delivering upward mobility has not been sufficiently examined as a structural phenomenon which dovetails with critical policy issues in taxation, educational provision, human rights, and welfare. This article argues that Sistema-style…

  11. 200-DV-1OU Sediment and Pore Water Analysis and Report for Samples at Borehole C8096

    SciTech Connect

    Lindberg, Michael J.

    2011-10-01

    This is an analytical data report for sediment samples received at 200-DV-1 OU. On August 30, 2011 sediment samples were received from 200-DV-1 OU Borehole C8096 for geochemical studies. The analyses for this project were performed at the 331 building located in the 300 Area of the Hanford Site. The analyses were performed according to Pacific Northwest National Laboratory (PNNL) approved procedures and/or nationally recognized test procedures. The data sets include the sample identification numbers, analytical results, estimated quantification limits (EQL), and quality control data. The preparatory and analytical quality control requirements, calibration requirements, acceptance criteria, and failure actions are defined in the on-line QA plan 'Conducting Analytical Work in Support of Regulatory Programs' (CAW). This QA plan implements the Hanford Analytical Services Quality Assurance Requirements Documents (HASQARD) for PNNL.

  12. Lait humain provenant d’une banque de dons ou acheté en ligne?

    PubMed Central

    St-Onge, Maude; Chaudhry, Shahnaz; Koren, Gideon

    2015-01-01

    Résumé Question Une de mes patientes m’a demandé si elle pourrait se procurer du lait humain par Internet pour allaiter son nourrisson s’il le fallait. L’usage de lait humain provenant d’une banque de dons est-il plus sécuritaire que son achat en ligne? Réponse L’Organisation mondiale de la Santé et l’American Academy of Pediatrics recommandent d’utiliser des dons de lait humain comme choix à privilégier lorsque le lait maternel n’est pas disponible. Cependant, la Société canadienne de pédiatrie n’approuve pas le partage de lait humain non traité. Le lait humain entreposé dans les banques de lait diffère de celui qu’on peut se procurer par Internet en raison du processus rigoureux de sélection des donneuses, des fréquentes inspections de la qualité, des procédés de transport règlementés et du processus de pasteurisation conforme aux directives établies par l’Agence canadienne d’inspection des aliments. La plupart des échantillons achetés en ligne contiennent des bactéries à gram négatif ou comptent au total plus de 104 unités formant colonies de bactéries aérobiques par millilitre; ils renferment aussi en moyenne au décompte total plus de bactéries aérobiques, de bactéries à gram négatif, de coliformes et de Staphylococcus spp que les échantillons des banques de lait. La croissance de la plupart des espèces de bactéries est associée au nombre de jours en transit, ce qui porte à croire que les conditions de collecte, d’entreposage et de transport sont médiocres pour le lait acheté en ligne.

  13. Estudio del sistema simbiótico AR Pavonis

    NASA Astrophysics Data System (ADS)

    Quiroga, C.; Brandi, E.; Ferrer, O.; García, L.; Barbá, R.

    Se presenta un estudio espectroscópico y polarimétrico de la binaria eclipsante AR Pavonis a partir de observaciones obtenidas con el telescopio de 2.15 m. del CASLEO (San Juan). El estudio de la naturaleza del sistema se realizó a través del análisis de algunos espectros reunidos entre los años 1990 y 1995 y de datos polarimétricos correspondientes al intervalo 1995 y 1997. El análisis espectroscópico indica que AR Pav está compuesta por una gigante roja M3.7 y una componente caliente compacta, con una temperatura mayor a 90000 K y una luminosidad del orden de 500Lsolar. A lo largo del período orbital, las variaciones observadas en flujo y en velocidades radiales, reflejan que las emisiones permitidas se forman en una región que rodea la componente caliente. El estudio de la polarización lineal de AR Pav indica que además de una componente interestelar, existe una componente intrínseca del sistema que varía temporalmente y con la longitud de onda de la luz polarizada. El distinto comportamiento del grado de polarización y del ángulo de posición observado en fases diferentes, sugiere que distintos mecanismos pueden estar actuando, dependiendo de la región de scattering observado a lo largo de la línea de la visual.

  14. [Hemorrhagic form of dengue fever observed at the Infectious Diseases Department CHU Yalgado Ouédraogo, Burkina Faso].

    PubMed

    Mamoudou, Savadogo; Boushab, Boushab Mohamed

    2016-01-01

    Dengue is a re-emerging arboviral disease in tropical countries. Haemorrhagic form may be associated with circulatory failure and produce hypovolemic shock, which is often fatal. We report a series of three cases of hemorrhagic dengue observed at the Infectious Diseases Department CHU Yalgado Ouédraogo, Ouagadougou, in order to describe its epidemiological, clinical, and evolutive characteristics. Our study included young females who had an onset age of between 35 years and 45 years, residing in the city of Ouagadougou. Despite multiple concentrated platelets transfusions and symptomatic treatment, we mourned a death. The development of antivirals and of new vaccines is a silver lining to prevent dengue lethality. PMID:27303584

  15. Water quality assessment of highly polluted rivers in a semi-arid Mediterranean zone Oued Fez and Sebou River (Morocco)

    NASA Astrophysics Data System (ADS)

    Perrin, J. L.; Raïs, N.; Chahinian, N.; Moulin, P.; Ijjaali, M.

    2014-03-01

    Oued Fez (one of the Sebou River tributaries - Morocco) allowed us to study and quantify the effect of the lack of wastewater treatment on surface water quality in semi-arid hydrological context. The analysis is based on field data collected from June 2009 to December 2011. Concentration and load patterns of nitrogen, phosphorus and chromium (used in the processing of leather) are compared in stable hydrological conditions during low flow and high flow periods in an eight-location sampling network. The Oued Fez and the Sebou River are characterised by severe pollution downstream from the city of Fez, particularly TN (mainly NH4 and Norg), TP (mainly Ppart) and TCr. The most polluted sites are those directly under the influence of domestic and industrial waste water inputs, particularly tannery effluents. Obviously, the concentrations measured at these locations are above all environmental quality standards. Pollutant loads are very heavy in the Sebou River and can contaminate the river course for kilometres. Moreover, as the water of the Sebou River is used for the irrigation of vegetables, serious problems of public health could arise. A better understanding of contaminant dynamics and self-purifying processes in these rivers will help implement actions and steps aimed at improving water quality in the Sebou River, which is the primary water supply source in Morocco and is used for agricultural and industrials purposes as well as for drinking water.

  16. Analysis of Aquifer Response, Groundwater Flow, and PlumeEvolution at Site OU 1, Former Fort Ord, California

    SciTech Connect

    Jordan, Preston D.; Oldenburg, Curtis M.; Su, Grace W.

    2005-02-24

    This report presents a continuation from Oldenburg et al. (2002) of analysis of the hydrogeology, In-Situ Permeable Flow Sensor (ISPFS) results, aquifer response, and changes in the trichloroethylene (TCE) groundwater plume at Operational Unit 1 (OU 1) adjacent to the former Fritzsche Army Airfield at the former Fort Ord Army Base, located on Monterey Bay in northern Monterey County. Fuels and solvents were burned on a portion of OU 1 called the Fire Drill Area (FDA) during airport fire suppression training between 1962 and 1985. This activity resulted in soil and groundwater contamination in the unconfined A-aquifer. In the late 1980's, soil excavation and bioremediation were successful in remediating soil contamination at the site. Shortly thereafter, a groundwater pump, treat, and recharge system commenced operation. This system has been largely successful at remediating groundwater contamination at the head of the groundwater plume. However, a trichloroethylene (TCE) groundwater plume extends approximately 3000 ft (900 m) to the northwest away from the FDA. In the analyses presented here, we augment our prior work (Oldenburg et al., 2002) with new information including treatment-system totalizer data, recent water-level and chemistry data, and data collected from new wells to discern trends in contaminant migration and groundwater flow that may be useful for ongoing remediation efforts. Some conclusions from the prior study have been modified based on these new analyses, and these are pointed out clearly in this report.

  17. Correlação de longo alcance em sistemas binários de raios-x usando remoção de flutuações

    NASA Astrophysics Data System (ADS)

    Pereira, M. G.; Moret, M. A.; Zebende, G. F.; Nogueira, E., Jr.

    2003-08-01

    Neste trabalho é proposta uma metodologia de analise de series temporais de fontes astrofísicas, baseada no método proposto por Peng et al. (1994) e Liu et al. (1999), o qual consiste na idéia de que uma série temporal correlacionada pode ser mapeada por um processo de busca de auto-similaridades em diversas escalas de tempo n. Removendo as eventuais tendências e integrando o sinal observado, é obtida uma medida do desvio médio quadrático das flutuações do sinal integrado F(n)~na, onde a representa o fator de escala associado com a auto-similaridade da correlação de longo alcance do sinal. Baseado nos valores obtidos de a, é possível distinguir entre os casos de sinais não-correlacionados, tipo ruído branco (a = 0,5), sinal anti-persistentes (a < 0,5) e sinal persistente (a > 0,5). Usando esta metodologia, foram analisadas 129 curvas de luz de sistemas binários de raios-X, provenientes do banco de dados públicos de observações feitas pelo instrumento All Sky Monitor, a bordo do satélite Rossi X-Ray Timing Explorer (ASM-RXTE). Foram identificadas a presença de a'0,5 em mais de 90% dos sistemas estudados, implicando em dizer que as flutuações de intensidade observadas apresentam correlação de auto-similaridade, sem entretanto, indícios de apresentarem uma escala de tempo característica das flutuações de intensidade. Sistemas onde são observadas erupções (flares), apresentam sistematicamente a > 0,5, característica esta, possivelmente associada com persistência das flutuações de densidade de disco ou taxa de acréscimo de massa. Os sistemas com curvas de luz onde nao são observadas as erupções apresentam uma distribuição normal centrada em a~0,62+/-0,10. Referências ¾ Peng, C.-K., Buldyrev, S.V., Havlin, S., Simons, M., Stanley, H.E., e Goldberg, A.L., Phys. Rev. E, (49), 1685 (1994). ¾ Liu, Y., Gopikrishnan, P., Cizeau, P., Meyer, M., Peng,C.-K., e Stanley, H.E., Phys. Rev. E, (60), 1390 (1999).

  18. Things to Remember about El Sistema: A Response to "El Sistema--A Perspective for North American Music Educators" by Tricia Tunstall

    ERIC Educational Resources Information Center

    Lesniak, Melissa

    2013-01-01

    Melissa Lesniak, the executive director of the Greater Miami Youth Symphony, discusses how much she enjoyed reading the responses to her "El Sistema" article and appreciates the opportunity for healthy dialogue and debate. In response, she states that there are many common goals and objectives across all music education programs that can…

  19. Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect.

    PubMed

    Ulanov, Alexander E; Fedorov, Ilya A; Sychev, Demid; Grangier, Philippe; Lvovsky, A I

    2016-01-01

    Highly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states-entangled N-photon wavepackets delocalized between two different locations-which outperform coherent states in measurement sensitivity. However, these states are notoriously vulnerable to losses, making them difficult to both share them between remote locations and recombine in order to exploit interference effects. Here we address this challenge by utilizing the reverse Hong-Ou-Mandel effect to prepare a high-fidelity two-photon N00N state shared between two parties connected by a lossy optical medium. We measure the prepared state by two-mode homodyne tomography, thereby demonstrating that the enhanced phase sensitivity can be exploited without recombining the two parts of the N00N state. Finally, we demonstrate the application of our method to remotely prepare superpositions of coherent states, known as Schrödinger's cat states. PMID:27324115

  20. Loss-tolerant state engineering for quantum-enhanced metrology via the reverse Hong-Ou-Mandel effect

    NASA Astrophysics Data System (ADS)

    Ulanov, Alexander E.; Fedorov, Ilya A.; Sychev, Demid; Grangier, Philippe; Lvovsky, A. I.

    2016-06-01

    Highly entangled quantum states, shared by remote parties, are vital for quantum communications and metrology. Particularly promising are the N00N states--entangled N-photon wavepackets delocalized between two different locations--which outperform coherent states in measurement sensitivity. However, these states are notoriously vulnerable to losses, making them difficult to both share them between remote locations and recombine in order to exploit interference effects. Here we address this challenge by utilizing the reverse Hong-Ou-Mandel effect to prepare a high-fidelity two-photon N00N state shared between two parties connected by a lossy optical medium. We measure the prepared state by two-mode homodyne tomography, thereby demonstrating that the enhanced phase sensitivity can be exploited without recombining the two parts of the N00N state. Finally, we demonstrate the application of our method to remotely prepare superpositions of coherent states, known as Schrödinger's cat states.

  1. Contribution to the study of pollution of soil and water in Oued El Maleh area (Mohammedia, Morocco)

    NASA Astrophysics Data System (ADS)

    El hajjaji, Souad; Dahchour, Abdelmalek; Belhsaien, Kamal; Zouahri, Abdelmjid; Moussadek, Rachid; Douaik, Ahmed

    2016-04-01

    In Morocco, diffuse ground and surface water pollution in irrigated areas has caused an increase in the risk of water and soil quality deterioration. This has generated a health and environmental risks. The present study was carried out in the Oued El Maleh region located 65 Km to the south of Rabat on the Moroccan Atlantic coast. It covers a surface area of 310 km2 where agriculture constitutes the main activity of the population. This region is considered as a very important agricultural area, known nationally for its high potential for market gardening. This intensification has been accompanied by an excessive use of agrochemical inputs and poor control of irrigation and drainage. Consequently, salinization phenomena and deterioration of soil structure as well as water are about to create an alarming situation. In order to assess the state of pollution of waters and soil in the region, our study focuses on the determination of physicochemical parameters for the quality of water and soil. The obtained results from sampled wells and surface water show relatively higher values of nitrate and conductivity exceeding Moroccan national standards and revealing net degradation of water quality; therefore the water can be considered not suitable for human consumption and can induce a degradation of soil. The results of the studied soil show that the pH of these soils is weakly to moderately basic; they are usually non-saline with organic matter content moderately filled. Moreover, very high concentrations of nutrients (potassium, phosphorus and nitrogen) were recorded, highlighting poor management fertilizing vegetable crops in the region of Oued El Maleh.

  2. L’administration postnatale de corticoïdes pour traiter ou prévenir les affections pulmonaires chroniques chez les prématurés

    PubMed Central

    2002-01-01

    Le présent énoncé est conçu à l’intention des professionnels de la santé qui soignent des nouveau-nés et de jeunes nourrissons. Il vise à examiner les effets à court et à long terme de l’administration postnatale de corticoïdes systémiques et par inhalation pour prévenir ou traiter une affection pulmonaire chronique évolutive ou établie et à faire des recommandations quant à l’usage de corticoïdes chez les nourrissons à très faible poids de naissance. Le recours systématique à la dexaméthasone systémique pour prévenir ou traiter une affection pulmonaire chronique n’est pas recommandé chez les nourrissons à très faible poids de naissance.

  3. "The Feelings Have Come Home to Me." Examining Advertising Films on the Swedish Website of El Sistema

    ERIC Educational Resources Information Center

    Kuuse, Anna-Karin; Lindgren, Monica; Skåreus, Eva

    2016-01-01

    The purpose of this study is to analyze how the music educational program of El Sistema Sweden is advertised and legitimized through moving images. The films are a major part of the information on the Swedish national website of El Sistema and are supposed to contribute to the picture that the organization and its founders wish to market. The use…

  4. Spatial assessment and source identification of trace metal pollution in stream sediments of Oued El Maadene basin, northern Tunisia.

    PubMed

    Ayari, J; Agnan, Y; Charef, A

    2016-07-01

    An extensive spatial survey was conducted on trace metal content in stream sediments from Oued El Maadene basin, northern Tunisia. Our objectives were to evaluate the level of trace metal pollution and associated ecological risk and identify the major sources of metal pollution. A total of 116 stream sediment samples were collected and analysed for total As, Cd, Cr, Cu, Ni, Pb, V, Zn, and Zr concentrations. The results showed that concentrations of Cr, Ni, V, and Zr were close to natural levels. In contrast, As, Cd, Cu, Pb, and Zn had elevated concentrations and enrichment factors compared to other contaminated regions in northern Tunisia. Ecological risk to aquatic ecosystems was highlighted in most areas. Principal component analysis showed that Cr, Ni, V, and Zr mainly derived from local soil and bedrock weathering, whilst As, Cd, Pb, and Zn originated from mining wastes. Trace metals could be dispersed downstream of tailings, possibly due to surface runoff during the short rainy season. Surprisingly, Cu, and to a lesser extent As, originated from agricultural activities, related to application of Cu-based fungicides in former vineyards and orchards. This study showed that, despite the complete cessation of mining activities several decades ago, metal pollution still impacts the local environment. This large pollution, however, did not mask other additional sources, such as local agricultural applications of fungicides. PMID:27270485

  5. Influence of rainfall space-time variability over the Ouémé basin in Benin

    NASA Astrophysics Data System (ADS)

    Gascon, T.; Vischel, T.; Lebel, T.; Quantin, G.; Pellarin, T.; Quatela, V.; Leroux, D.; Galle, S.

    2015-05-01

    In West Africa, the concomitant occurrence of extreme droughts and damaging floods points to the urgent need for linking the climate variability at various time scales (daily to decadal) to its impact in terms of water related risks. While hydrological models are key tools to do so, their use in this part of the world is strongly limited by the scarcity of rainfall data. Satellite precipitation products can be used as rainfall input to models in order to make up for this shortage of appropriate surface data. However, these satellite products have their own weaknesses, both in terms of accuracy and resolution. While the accuracy of satellite rainfall estimates has already received a fair amount of attention, little published work deals with the resolution issue. The study presented here is motivated by this lack of attention to the resolution issue. It makes use of the data produced by a very dense rainfall network covering the Ouémé catchment in Benin (14 600 km2), to study the impact of varying the space-time resolution of input rainfields on the output produced by DHSVM (Distributed Hydrology Soils and Vegetation Model), thus mimicking the resolution-induced errors associated with using satellite rainfall input for such physically-based models. The major result of this sensitivity analysis is that the model output is much more sensitive to the time resolution than to the space resolution, at least for this region and for the range of resolutions tested.

  6. Hong-Ou-Mandel interference experiment of two independent heralded single photon sources in an optical fiber with birefringence

    NASA Astrophysics Data System (ADS)

    Ma, Tianyi; Zhou, Qiang; Zhang, Wei; Huang, Yidong; Cui, Xiaowei; Lu, Mingquan; Feng, Zhenming

    2012-11-01

    Single photon sources (SPSs) play important roles in quantum communication and quantum information processing. Spontaneous four wave mixing (SFWM) in optical fibers provides a promising way to realize practical heralded single photon sources (HSPSs), since it is compatible with current techniques of optical communications. In this paper, two independent HSPSs at 1.5μm band are realized in one polarization maintaining dispersion shifted fiber (PM-DSF) utilizing its large birefringence. When pulsed pump light passes through an optical fiber, two kinds of SFWM will take place simultaneously. One is scalar processes, in which two annihilated pump photons and generated photon pair are all polarized along the same fiber polarization axis. The other is vector processes, in which two annihilated pump photons are polarized along different fiber polarization axes, either for the two photons of the generated pair. In the PM-DSF, the large birefringence generates obvious walk-off effect on the two pump polarization components, which leads to an effective suppression of the vector processes. Hence, by proper pump polarization, correlated photon pairs (CPPs) with different polarization directions can be generated independently by the two scalar processes, which can be used to realize two independent HSPSs. The indistinguishability of the heralded photons generated by the two independent sources is demonstrated by an experiment of Hong-Ou-Mandel (HOM) interference. Using a fiber coupler as the beam splitter, a visibility of HOM dip of 76% is achieved, showing their potential on quantum information.

  7. Laser-cooling atoms to indistinguishability: Atomic Hong-Ou-Mandel interference and entanglement through spin-exchange

    NASA Astrophysics Data System (ADS)

    Kaufman, Adam

    In this thesis, I describe the development of and scientific results from a new platform for creating ultracold atoms via single-atom control. We employ Raman-sideband cooling to isolated bosonic 87Rb atoms confined within sub-micron optical tweezers, yielding single particle three- dimensional ground-state fractions of 90%. We create multiple, independent, mobile optical tweezers, which simultaneously allows multi-particle studies with single-atom microscopy and highly tunable length-scales. We employ this toolset in both of the main experiments discussed in this thesis. In one experiment, we observe Hong-Ou-Mandel interference of two bosonic atoms, each of which is independently prepared in spatially separated optical tweezers. The interference we observe is a direct consequence of the purity of the single particle quantum states produced, and the indistinguishability of the atoms. In a second experiment, we introduce a spin-degree of freedom and exploit spin-exchange dynamics, driven by the quantum-statistics of the particles, to create a spin-entangled pair of spatially separated atoms.

  8. El Sistema as a Bourgeois Social Project: Class, Gender, and Victorian Values

    ERIC Educational Resources Information Center

    Bull, Anna

    2016-01-01

    This article asks why classical music in the UK, which is consumed and practiced by the middle and upper classes, is being used as a social action program for working-class children in British music education schemes inspired by El Sistema. Through exploring the discourse of the social benefits of classical music in the late nineteenth century, a…

  9. Improving Middle School Quality in Poor Countries: Evidence from the Honduran "Sistema De Aprendizaje Tutorial"

    ERIC Educational Resources Information Center

    McEwan, Patrick J.; Murphy-Graham, Erin; Torres Irribarra, David; Aguilar, Claudia; Rápalo, Renán

    2015-01-01

    This article evaluates the impact and cost-effectiveness of offering an innovative middle school model--the Sistema de Aprendizaje Tutorial (SAT)--to Honduran villages instead of traditional middle schools. We identified a matched sample of villages with either type of school and collected baseline data among primary school graduates eligible to…

  10. El Sistema de Formas en Colores for Teaching Grammar in Spanish

    ERIC Educational Resources Information Center

    Nailon, James

    2010-01-01

    Sistema de formas en colores (SFC) is a symbols-based system for teaching Spanish grammatical structures and concepts within a communicative context in the elementary school. The (ACTFL) Standards for Foreign Language Learning: Preparing for the 21st Century states that, "While grammar and vocabulary are essential tools for communication, it is…

  11. Exploración del Sistema Solar -- Una mirada hacia el futuro

    NASA Video Gallery

    ¿Piensas que ya sabemos todo acerca de nuestro sistema solar? La realidad es que apenas hemos comenzado con lo que hay para conocer. Únete a la NASA, en el envío de misiones a los confines del sist...

  12. Social Responsibility and Community Development: Lessons from the Sistema de Aprendizaje Tutorial in Honduras

    ERIC Educational Resources Information Center

    Honeyman, Catherine A.

    2010-01-01

    This article extends understanding of the connections between education, social capital, and development through a mixed-methods case study of the Sistema de Aprendizaje Tutorial, or SAT, an innovative secondary-level education system. The quantitative dimension of the research used survey measures of social responsibility to compare 93 SAT…

  13. Another Perspective: El Sistema--A Perspective for North American Music Educators

    ERIC Educational Resources Information Center

    Tunstall, Tricia

    2013-01-01

    Herein, Tricia Tunstall presents a critique of the article by Melissa Lesniak published in the December 2012 "Music Educators Journal," and offers a new perspective on the Venezuelan youth orchestra program known as "El Sistema." The program, which began in Caracas thirty-eight years ago, is dedicated to changing the lives of…

  14. Five Encounters with "El Sistema" International: A Venezuelan Marvel Becomes a Global Movement

    ERIC Educational Resources Information Center

    Booth, Eric; Tunstall, Tricia

    2014-01-01

    Genuine worldwide movements for social change are rare in human history. Even more rare is the phenomenon of a worldwide movement for social change through art, with teaching artists at the forefront. This article presents the evolution of such a movement now, in the global blossoming of "El Sistema," a program that seeks to change the…

  15. Assimilation of SMOS soil moisture products to improve streamflow simulations on the Ouémé catchment in Benin

    NASA Astrophysics Data System (ADS)

    Leroux, Delphine; Pellarin, Thierry; Vischel, Théo; Gascon, Tania; Kerr, Yann

    2015-04-01

    The Ouémé catchment is located in the central part of Benin in West Africa. Its climate, extremely dry in winter and heavy rains in summer, makes the water cycle a true challenge to model, especially for the water management in the agricultural areas. DHSVM (Distributed Hydrology Soil Vegetation Model) is a physically based and distributed hydrological model that solves the energy and water balance at each time step. This model simulates the soil moisture at each soil layer, the snow quantity, the evapotranspiration, the runoff and the streamflow. It was used with an hourly time step at a 1 km resolution. Model parameters have been calibrated using 2005 in situ streamflow measurements along with in situ precipitations. When using satellite precipitation observations, the streamflow simulations are no longer in agreement with in situ measurements. The goal of this work is to assimilate the SMOS soil moisture product into the hydrological model DHSVM using a Kalman filter for a better constraint on the water cycle model when using satellite precipitation observations. First results tend to show an improvement of the simulated streamflow using the SMOS assimilation into DHSVM. SMOS acts on the system by adding or removing some water when satellite observations are either under or overestimating the precipitations. The ESA's SMOS mission was launched in November 2009 and has been providing Soil Moisture and Ocean Salinity data for the last five years. Soil moisture products are available at a 25 km resolution with a 3-day global coverage (Level 3 data). Besides the choice of the assimilation method, the difference in spatial resolutions is also being taken care of by using an influence circle area. Highlights are mainly put on the impacts of the assimilation on the soil moisture and on the streamflow. Furthermore, DHSVM also models the water table depth and a first attempt to estimate groundwater volume for the entire watershed is presented in this study.

  16. Les considérations éthiques relatives à la désadoption d'aspects inefficaces ou nuisibles des soins de santé.

    PubMed

    Niven, Daniel J; Leigh, Jeanna Parsons; Stelfox, Henry T

    2016-09-01

    La désadoption désigne l'abandon d'une pratique médicale ou d'un service de santé inefficace ou nuisible après une période d'adoption. Tandis que les dépenses croissantes en matière de santé menacent de paralyser les sociétés qui les financent, le fait de faciliter la désadoption peut faire partie intégrante de systèmes de santé durables qui prodiguent des soins de qualité. Le présent article explore des enjeux éthiques qui se rapportent à la désadoption, y compris les principes sous-jacents de bénéficience, de non-maléficience, de justice et d'autonomie. PMID:27576859

  17. Antibody Production, Anaphylactic Signs, and T-Cell Responses Induced by Oral Sensitization With Ovalbumin in BALB/c and C3H/HeOuJ Mice

    PubMed Central

    Pablos-Tanarro, Alba; López-Expósito, Ivan; Lozano-Ojalvo, Daniel; López-Fandiño, Rosina

    2016-01-01

    Purpose Two mouse strains, BALB/c and C3H/HeOuJ, broadly used in the field of food allergy, were compared for the evaluation of the allergenic potential of ovalbumin (OVA). Methods Sensitization was made by administering 2 different OVA doses (1 and 5 mg), with cholera toxin as Th2-polarizing adjuvant. Antibody levels, severity of anaphylaxis, and Th1 and Th2 responses induced by the allergen were assessed. In addition, because the mice selected had functional toll-like receptor 4, the influence of contamination with lipopolysaccharide (LPS) on the immunostimulating capacity of OVA on spleen cells was also evaluated. Results Both strains exhibited similar susceptibility to OVA sensitization. The 2 protein doses generated similar OVA-specific IgE and IgG1 levels in both strains, whereas C3H/HeOuJ mice produced significantly more IgG2a. Oral challenge provoked more severe manifestations in C3H/HeOuJ mice as indicated by the drop in body temperature and the severity of the anaphylactic scores. Stimulation of splenocytes with OVA led to significantly higher levels of Th2 and Th1 cytokines in BALB/c, and these were less affected by protein contamination with LPS. Conclusions The antibody and cytokine levels induced by OVA in BALB/c mice and the observation that BALB/c spleen cell cultures were more resistant than those of C3H/HeOuJ mice to the stimulus of LPS make this strain prone to exhibit Th2-mediated food allergic reactions and very adequate for the study of the features of OVA that make it allergenic. PMID:26922934

  18. Calcification and Silicification: Fossilization Potential of Cyanobacteria from Stromatolites of Niuafo‘ou's Caldera Lakes (Tonga) and Implications for the Early Fossil Record

    PubMed Central

    Kazmierczak, Józef; Łukomska-Kowalczyk, Maja; Kempe, Stephan

    2012-01-01

    Abstract Calcification and silicification processes of cyanobacterial mats that form stromatolites in two caldera lakes of Niuafo‘ou Island (Vai Lahi and Vai Si‘i) were evaluated, and their importance as analogues for interpreting the early fossil record are discussed. It has been shown that the potential for morphological preservation of Niuafo‘ou cyanobacteria is highly dependent on the timing and type of mineral phase involved in the fossilization process. Four main modes of mineralization of cyanobacteria organic parts have been recognized: (i) primary early postmortem calcification by aragonite nanograins that transform quickly into larger needle-like crystals and almost totally destroy the cellular structures, (ii) primary early postmortem silicification of almost intact cyanobacterial cells that leave a record of spectacularly well-preserved cellular structures, (iii) replacement by silica of primary aragonite that has already recrystallized and obliterated the cellular structures, (iv) occasional replacement of primary aragonite precipitated in the mucopolysaccharide sheaths and extracellular polymeric substances by Al-Mg-Fe silicates. These observations suggest that the extremely scarce earliest fossil record may, in part, be the result of (a) secondary replacement by silica of primary carbonate minerals (aragonite, calcite, siderite), which, due to recrystallization, had already annihilated the cellular morphology of the mineralized microbiota or (b) relatively late primary silicification of already highly degraded and no longer morphologically identifiable microbial remains. Key Words: Stromatolites—Cyanobacteria—Calcification—Silicification—Niuafo‘ou (Tonga)—Archean. Astrobiology 12, 535–548. PMID:22794297

  19. Variable phenotypic expressivity in inbred retinal degeneration mouse lines: A comparative study of C3H/HeOu and FVB/N rd1 mice

    PubMed Central

    van Wyk, Michiel; Schneider, Sabine

    2015-01-01

    Purpose Recent advances in optogenetics and gene therapy have led to promising new treatment strategies for blindness caused by retinal photoreceptor loss. Preclinical studies often rely on the retinal degeneration 1 (rd1 or Pde6brd1) retinitis pigmentosa (RP) mouse model. The rd1 founder mutation is present in more than 100 actively used mouse lines. Since secondary genetic traits are well-known to modify the phenotypic progression of photoreceptor degeneration in animal models and human patients with RP, negligence of the genetic background in the rd1 mouse model is unwarranted. Moreover, the success of various potential therapies, including optogenetic gene therapy and prosthetic implants, depends on the progress of retinal degeneration, which might differ between rd1 mice. To examine the prospect of phenotypic expressivity in the rd1 mouse model, we compared the progress of retinal degeneration in two common rd1 lines, C3H/HeOu and FVB/N. Methods We followed retinal degeneration over 24 weeks in FVB/N, C3H/HeOu, and congenic Pde6b+ seeing mouse lines, using a range of experimental techniques including extracellular recordings from retinal ganglion cells, PCR quantification of cone opsin and Pde6b transcripts, in vivo flash electroretinogram (ERG), and behavioral optokinetic reflex (OKR) recordings. Results We demonstrated a substantial difference in the speed of retinal degeneration and accompanying loss of visual function between the two rd1 lines. Photoreceptor degeneration and loss of vision were faster with an earlier onset in the FVB/N mice compared to C3H/HeOu mice, whereas the performance of the Pde6b+ mice did not differ significantly in any of the tests. By postnatal week 4, the FVB/N mice expressed significantly less cone opsin and Pde6b mRNA and had neither ERG nor OKR responses. At 12 weeks of age, the retinal ganglion cells of the FVB/N mice had lost all light responses. In contrast, 4-week-old C3H/HeOu mice still had ERG and OKR responses, and we

  20. Sistema Planeta-Satélite. Simulación orbital y potenciales gravitatorios

    NASA Astrophysics Data System (ADS)

    Medina, C.; Carrillo, M.

    Se presenta un programa (desarrollado en Quick Basic 4.5) que simula, en tres dimensiones, el movimiento orbital de un satélite (o luna) alrededor de un planeta, al tiempo que calcula y grafica, en un plano, el potencial gravitatorio del sistema en función de la distancia al planeta. Para la simulación orbital, se emplea la matriz de transformación entre el sistema del planeta y el plano orbital. Para el cálculo y graficación del potencial se aplica un desarrollo en serie hasta el segundo orden, que da cuenta del efecto de achatamiento de los polos, en caso de que éste exista. Las longitudes de los ejes del planeta, la masa de éste y del satélite, sus tamaños aparentes, y los parámetros orbitales son introducidos por el usuario.

  1. Discos de acresção em sistemas Be-X

    NASA Astrophysics Data System (ADS)

    Lopes de Oliveira, R.; Janot-Pacheco, E.

    2003-08-01

    Alguns fenômenos de outbursts em Be-X sugerem a existência, mesmo que temporária, de um disco de acresção quando da passagem do objeto compacto pelo periastro orbital. Neste trabalho avaliamos a possibilidade de formação do disco de acresção em sistemas Be+estrela de neutrons e Be+anã branca, e a influência da excentricidade orbital na ocorrência deste fenômeno. Utilizamos a expressão analítica para o momento angular específico da matéria constituinte de um meio em expansão lenta, como é o caso do disco circunstelar das estrelas Be, proposta por Wang(1981), sob a condição básica de que o raio de circularização deva ser maior do que o raio de Alfvén. Concluímos que existe um limite para o período orbital do sistema acima do qual não é possível a formação do disco de acresção, e que este valor aumenta para sistemas com excentricidade orbital maior.

  2. Nature, origine et évolution des fluides dans le district minier de la caldeira d'oued bélif (nefza, Tunisie septentrionale)

    NASA Astrophysics Data System (ADS)

    Talbi, Fouad; Slim-Shimi, Najet; Tlig, Said; Zargouni, Fouad

    1999-02-01

    Fluid inclusion studies were undertaken on quartz, fluorite and calcites in the Oued Bélif caldera ore district in northern Tunisia. Two main groups of inclusions were distinguished: a fluid inclusion group, of magmatic origin, with a temperature higher than 350 °C and salinity higher than 30 wt % NaCl; and a group of mixing between magmatic and meteoric fluids with temperatures and salinities ranging from 150 to 250 °C and from 15 to 25 wt % NaCl, respectively. These two groups result from hydrothermal circulations of respectively, "porphyry copper" and epithermal systems; this is confirmed by the nature of the alteration.

  3. Calcification and silicification: fossilization potential of cyanobacteria from stromatolites of Niuafo'ou's Caldera Lakes (Tonga) and implications for the early fossil record.

    PubMed

    Kremer, Barbara; Kazmierczak, Józef; Lukomska-Kowalczyk, Maja; Kempe, Stephan

    2012-06-01

    Calcification and silicification processes of cyanobacterial mats that form stromatolites in two caldera lakes of Niuafo'ou Island (Vai Lahi and Vai Si'i) were evaluated, and their importance as analogues for interpreting the early fossil record are discussed. It has been shown that the potential for morphological preservation of Niuafo'ou cyanobacteria is highly dependent on the timing and type of mineral phase involved in the fossilization process. Four main modes of mineralization of cyanobacteria organic parts have been recognized: (i) primary early postmortem calcification by aragonite nanograins that transform quickly into larger needle-like crystals and almost totally destroy the cellular structures, (ii) primary early postmortem silicification of almost intact cyanobacterial cells that leave a record of spectacularly well-preserved cellular structures, (iii) replacement by silica of primary aragonite that has already recrystallized and obliterated the cellular structures, (iv) occasional replacement of primary aragonite precipitated in the mucopolysaccharide sheaths and extracellular polymeric substances by Al-Mg-Fe silicates. These observations suggest that the extremely scarce earliest fossil record may, in part, be the result of (a) secondary replacement by silica of primary carbonate minerals (aragonite, calcite, siderite), which, due to recrystallization, had already annihilated the cellular morphology of the mineralized microbiota or (b) relatively late primary silicification of already highly degraded and no longer morphologically identifiable microbial remains. PMID:22794297

  4. Total petroleum systems of the Trias/Ghadames Province, Algeria, Tunisia, and Libya; the Tanezzuft-Oued Mya, Tanezzuft-Melrhir, and Tanezzuft-Ghadames

    USGS Publications Warehouse

    Klett, T.R.

    2000-01-01

    Undiscovered conventional oil and gas resources were assessed within total petroleum systems of the Trias/Ghadames Province (2054) as part of the U.S. Geological Survey World Petroleum Assessment 2000. The Trias/Ghadames Province is in eastern Algeria, southern Tunisia, and westernmost Libya. The province and its total petroleum systems generally coincide with the Triassic Basin. The province includes the Oued Mya Basin, Melrhir Basin, and Ghadames (Berkine) Basin. Although several total petroleum systems may exist within each of these basins, only three ?composite? total petroleum systems were identified. Each total petroleum system occurs in a separate basin, and each comprises a single assessment unit. The main source rocks are the Silurian Tanezzuft Formation (or lateral equivalents) and Middle to Upper Devonian mudstone. Maturation history and the major migration pathways from source to reservoir are unique to each basin. The total petroleum systems were named after the oldest major source rock and the basin in which it resides. The estimated means of the undiscovered conventional petroleum volumes in total petroleum systems of the Trias/Ghadames Province are as follows: [MMBO, million barrels of oil; BCFG, billion cubic feet of gas; MMBNGL, million barrels of natural gas liquids] Total Petroleum System MMBO BCFG MMBNGL Tanezzuft-Oued Mya 830 2,341 110 Tanezzuft-Melrhir 1,875 4,887 269 Tanezzuft-Ghadames 4,461 12,035 908

  5. Sistemas Correctores de Campo Para EL Telescopio Ritchey-Chretien UNAM212

    NASA Astrophysics Data System (ADS)

    Cobos, F. J.; Galan, M. J.

    1987-05-01

    El telescopio UNAM2l2 fue inaugurado hace siete años y concebido para trabajar en las razones focales: f/7.5, F/13.5, F/27 y F/98. El diseño Ritchey-Chretién corresponde a la razón focal F/7.5 y el foco primario (F/2.286) no se consideró como utilizable para fotografía directa. En el Instituto de Astronomía de la UNAM, se diseñó y construyó un sistema corrector de campo para la razón focal F/7.5, que actualmente está en funcionamiento. Dentro de un programa de colaboración en diseflo y evaluación de sistemas ópticos, entre el Instituto de Astrofísica de Canarias y el Instituto de Astronomía de la UNAM, decidimos intentar el diseño de una correctora de campo para el foco primario del tȩlescopio UNAM212 bajo la consideración de que no son insalvables los problemas que implicaría su instalación y de que es muy posible que, en un futuro relativamente cercano, podamom tener un detector bidimenmional tipo Mepsicrón cuya área sensible haga tentadora la idea de construir la cámara directa para foco primario

  6. Aspects of choosing appropriate concepts for modelling groundwater resources in regional integrated water resources management Examples from the Neckar (Germany) and Ouémé catchment (Benin)

    NASA Astrophysics Data System (ADS)

    Barthel, R.; Jagelke, J.; Götzinger, J.; Gaiser, T.; Printz, Andreas

    Two regional groundwater flow models (Neckar catchment, Germany, 14,000 km 2, and Southern Ouémé Basin, Benin, 11,000 km 2) were developed within the framework of the integrated management project ‘RIVERTWIN’ ( www.rivertwin.org). Both models were evaluated with respect to the question if the chosen modelling approaches (multi-layered finite difference numerical flow modelling, steady state and transient) are appropriate in view of the existing management problems in the catchments, the data availability and the hydrogeological and hydrological conditions in the basins. It is shown that neither the model in the well-investigated, data-rich basin in Western Europe with its highly developed water related infrastructure, nor the model in the hydrogeologically less well-known and less developed basin in Western Africa provide results that are fully applicable to the main regional management tasks. In the case of the Ouémé, the groundwater related problems are foremost of local character and therefore cannot be addressed by regional models in a meaningful way. Data scarcity and complex, unfavourable geological conditions (crystalline rocks, discontinuous aquifers) support the conclusion that numerical 3D groundwater flow models are currently not helpful to manage groundwater related management problems in the Ouémé basin. A better understanding of regional hydrological surface and subsurface processes is required first. Methods for a reliable estimation of groundwater recharge and subsequently groundwater availability were identified as the most urgently needed tool for meaningful groundwater management in view of climatic, demographic and land use change. In the Neckar catchment the results of the analysis are less pronounced; here regional groundwater problems could clearly benefit from a physically based 3D model since the hydrogeological system is strictly stratified with several important aquifers in the vertical sequence. As a general conclusion it can

  7. Determination of heavy metals in suspended waste water collected from Oued El Harrach Algiers River by Energy Dispersive X-Ray Fluorescence

    NASA Astrophysics Data System (ADS)

    Ouziane, S.; Amokrane, A.; Toumert, I.

    2013-12-01

    A preliminary study of the atmospheric pollution in the centre of Algiers is one of the important fields of applications in the environmental science. Nowadays, we need to evaluate the level of the contamination which has an unfavourable effect on physicochemical properties of soils and plants and namely also on human health. In the present work, water samples collected from Oued El-Harrach Algiers River, have been filtered in 0.45 μm Millipore filters to be analysed by Energy Dispersive X-Ray Fluorescence technique using 109Cd radioisotope source. Concentrations of the toxic elements like heavy metals are determined and compared with the published ones values by Yoshida [1] and those obtained using PIXE and NAA techniques [6].

  8. Le fibromatosis colli ou torticolis congénital: son diagnostic et sa prise en charge à propos de deux cas

    PubMed Central

    Tchaou, Mazamaesso; Pegbessou, Plaodezina Essobozou; Sonhaye, Lantam; Ahouanssou, Patricia Yékpé; Amadou, Abdoulatif; Kolou, Beresa; Kama, Lidi Bessi; Garba, Nouhou Mahamadou; Koussema, Lama Kegdigoma Agoda; N'dakéna, Koffi

    2015-01-01

    Le fibromatosis colli (FC) est pseudotumeur rare du muscle sterno-cléido-mastoïdien (SCM), à l'origine d'un torticolis dit congénital chez le nouveau-né ou le nourrisson. Le mécanisme étio-pathogénique de sa survenue est sujet à controverse. Son diagnostic fait appel à l’échographie qui permet de mettre en évidence un épaississement caractéristique du muscle. Nous rapportons deux cas diagnostiqués par l’échographie avec pour un cas une notion de malposition intra-utérine et pour l'autre cas une absence totale de malposition et de traumatisme obstétrical qui pourtant est évoqué comme élément du mécanisme de survenue du FC. PMID:26834927

  9. Response of Nereis diversicolor (Polychaeta, Nereidae) populations to reduced wastewater discharge in the polluted estuary of Oued Souss, Bay of Agadir, Morocco

    NASA Astrophysics Data System (ADS)

    Ait Alla, A.; Gillet, P.; Deutsch, B.; Moukrim, A.; Bergayou, H.

    2006-12-01

    Field investigations on the population dynamics of Nereis diversicolor were carried out from January 2002 to December 2003 in the estuary of Oued Souss (southwestern Morocco) to determine the changes caused by setting up of a domestic and industrial wastewater purification plant (M'zar) before and after by the end of wastewater discharges in November 2002 on the structure of the ecosystem. Samples of N. diversicolor were collected monthly in the intertidal zone at low tide before (during 2002) and after (during 2003) the end of wastewater discharges. Separation of cohorts using the Algorithm EM method (McLachlan, G.J., Krishnan, T., 1997. The EM algorithm and extensions. Wiley Series in Probability and Statistics. Wiley, New York, 274 pp.) allowed determination of the growth rate (mm day -1) by cohort and the annual production. The data showed significant differences between populations of Nereis diversicolor before and after the end of wastewater discharges. During the wastewater discharge period (2002), the population had a mean annual density of 1992 ind m -2, a mean annual biomass of 75.52 g DW m -2 and an annual secondary production of 141.3 g DW m -2 with a P/ B ratio of 1.87. After the end of discharges (2003), density, biomass and secondary production decreased significantly. The annual averages for these parameters were 740 ind m -2, 14.16 g DW m -2 and 23.83 g DW m -2, respectively, with a P/ B ratio of 1.68. The important decrease observed in density, biomass and secondary production of Nereis diversicolor may be attributed (a) to the environmental changes observed after the end of wastewater discharges in the estuary of Oued Souss, namely the increase of salinity and the decrease of organic matter content, and (b) to the migration of this species towards other areas.

  10. Slug Test Characterization Results for Multi-Test/Depth Intervals Conducted During the Drilling of CERCLA Operable Unit OU UP-1 Wells 299-W19-48, 699-30-66, and 699-36-70B

    SciTech Connect

    Spane, Frank A.; Newcomer, Darrell R.

    2010-06-15

    This report presents test descriptions and analysis results for multiple, stress-level slug tests that were performed at selected test/depth intervals within three Operable Unit (OU) UP-1 wells: 299-W19-48 (C4300/Well K), 699-30-66 (C4298/Well R), and 699-36-70B (C4299/Well P). These wells are located within, adjacent to, and to the southeast of the Hanford Site 200-West Area. The test intervals were characterized as the individual boreholes were advanced to their final drill depths. The primary objective of the hydrologic tests was to provide information pertaining to the areal variability and vertical distribution of hydraulic conductivity with depth at these locations within the OU UP-1 area. This type of characterization information is important for predicting/simulating contaminant migration (i.e., numerical flow/transport modeling) and designing proper monitor well strategies for OU and Waste Management Area locations.

  11. Slug Test Characterization Results for Multi-Test/Depth Intervals Conducted During the Drilling of CERCLA Operable Unit OU ZP-1 Wells 299-W11-43, 299-W15-50, and 299-W18-16

    SciTech Connect

    Spane, Frank A.; Newcomer, Darrell R.

    2010-06-21

    The following report presents test descriptions and analysis results for multiple, stress level slug tests that were performed at selected test/depth intervals within three Operable Unit (OU) ZP-1 wells: 299-W11-43 (C4694/Well H), 299-W15-50 (C4302/Well E), and 299-W18-16 (C4303/Well D). These wells are located within south-central region of the Hanford Site 200-West Area (Figure 1.1). The test intervals were characterized as the individual boreholes were advanced to their final drill depths. The primary objective of the hydrologic tests was to provide information pertaining to the areal variability and vertical distribution of hydraulic conductivity with depth at these locations within the OU ZP-1 area. This type of characterization information is important for predicting/simulating contaminant migration (i.e., numerical flow/transport modeling) and designing proper monitor well strategies for OU and Waste Management Area locations.

  12. Instantánea de los cánceres de cerebro y del sistema nervioso central

    Cancer.gov

    Información sobre las tendencias de incidencia, mortalidad y financiamiento del NCI sobre los cánceres de cerebro y del sistema nervioso central; así como ejemplos de actividades del NCI y adelantos en la investigación de estos tipos de cáncer.

  13. The Rough and the Smooth--Students' Experiences of O.U. Study. Open-Ended Feedback from the Student Opinion Survey. The "Pete Davey Survey." Report No. 2.

    ERIC Educational Resources Information Center

    Mason, Robin; Morgan, Alistair

    The Student Opinion Survey was sent to a random sample of 2,600 Open University (OU) students who had gained at least two credits and were studying during 1984. The response rate was 84 percent. Responses to open-ended questions on about one-third of those questionnaires were analyzed to determine the significant phenomena in students' experiences…

  14. Détention provisoire des jeunes femmes accusées d'avortement clandestin ou d'infanticide au Sénégal

    PubMed Central

    Soumah, Mohamed Maniboliot; Pemba, Liliane Flore

    2012-01-01

    Introduction L'activité sexuelle chez les jeunes les expose à un accroissement du risque de contracter des grossesses non désirées. Le recours à l'avortement clandestin avec son corollaire de complications peut entrainer le décès de la jeune femme. Avortement et infanticide sont interdits et sanctionnés par la loi sénégalaise. Comment ces jeunes femmes vivent-elles leur détention? Existe-il des alternatives à la détention pour éviter leur désocialisation? Méthodes Cette étude rétrospective portait sur la maison d'arrêt des femmes de Dakar située à Liberté 6, un quartier de Dakar. Nous avons procédé à des entretiens avec des femmes détenues à la maison d'arrêt des femmes de Dakar et suspectées d'infanticide ou d'avortement clandestin. Résultats Les femmes de notre échantillon ont une moyenne d’âge inférieure à 25 ans avec parmi elles une fille mineure de 16 ans. Nous avons trouvé 18,51% de femmes suspectées d'infanticide ou d'avortement. Dans notre étude 50% des femmes sont originaires de la périphérie et de la banlieue de Dakar et presque 44% proviennent des autres régions du pays. La durée moyenne de détention provisoire est de neuf mois. Conclusion Malgré leur qualification distincte dans le code pénal: l'infanticide est un crime et l'avortement un délit, les femmes suspectées d'avoir commis ces actes sont soumises à de longues détentions préventives. PMID:22937189

  15. Fiabilité des structures mécaniques adaptatives: effet de la panne des actionneurs ou des capteurs sur la stabilité

    NASA Astrophysics Data System (ADS)

    Fall, H.; Charon, W.; Kouta, R.

    2002-12-01

    Ces dernières décennies, des activités significatives dans le monde étaient dirigées autour du contrôle actif. Le but de ces recherches était essentiellement d'améliorer les performances, la fiabilité et la sécurité des systèmes. Notamment dans le cas des structures soumises à des vibrations aléatoires. D'importants travaux ont été consacré à l'utilisation des “matériaux intelligents” comme capteurs et actionneurs. Cette article propose l'analyse de la fiabilité des systèmes mécaniques en étudiant les pannes des actionneurs ou des capteurs. L'effet de ces pannes sur la stabilité et la performance du système y est démontré. Les méthodologies de conception y sont rappelées. Des exemples numériques sont fournis à travers le contrôle d'un panneau sous chargement dynamique pour illustrer la méthode proposée.

  16. Soil Organic Carbon Pool and Its Chemical Composition in Phyllostachy pubescens Forests at Two Altitudes in Jian-ou City, China

    PubMed Central

    Ji, Haibao; Zhuang, Shunyao; Zhu, Zhaoliang; Zhong, Zheke

    2015-01-01

    Phyllostachys pubescens forests play an important role in soil organic carbon (SOC) sequestration in terrestrial ecosystems. However, the estimation and mechanism of SOC sequestration by P. pubescens forests remain unclear. In this study, the effect of P. pubescens forest distribution with elevation was investigated at two altitude sites in Jian-ou City, Southeast China. SOC storage was estimated and its chemical composition was obtained via 13C-nuclear magnetic resonance (NMR), chemical classification, and spectral analysis. Results showed that the SOC contents and stocks were significantly higher at the high-altitude site than at the low-altitude site in the entire soil profile (0–60 cm). The C contents of the three combined humus forms exhibited similar responses to the elevation change, and all of these forms were higher at the high-altitude site than at the low-altitude site regardless of soil layer. However, the proportions of the three combined humus C showed no significant differences between the two altitudes. The results of 13C-NMR showed that the SOC chemical composition did not significantly vary with elevation as well. This finding was consistent with the E465/E665 of the loosely combined humus. Overall, the results suggested that altitude should be considered during regional SOC estimation and that altitude affected the quantity rather than the quality of the SOC under the same P. pubescens vegetation. PMID:26716688

  17. Coupling of spin and orbital degrees of freedom in tunable Hong-Ou-Mandel interference involving photons in hybrid spin-orbit modes

    NASA Astrophysics Data System (ADS)

    Leary, Cody C.; Lankford, Maggie; Sundarraman, Deepika

    2015-05-01

    We investigate the connection between biphoton states involving photons in product modes of their spin and orbital degrees of freedom and those involving photons in hybrid spin-orbit modes, as mediated by Hong-Ou-Mandel interference (HOMI) in an asymmetric Mach-Zehnder interferometer. We predict that two input photons in balanced superposition states of both their spin and orbital degrees of freedom will exhibit HOMI while undergoing a simultaneous mode conversion from product spin-orbit input modes to hybrid output modes bearing orbital angular momentum. These hybrid outputs contain a spatially varying polarization structure which may be controllably rotated about the photonic beam axis by varying the relative phase between the vertical and horizontal components of each input photon's polarization. Additionally, a type of coupling of the spin and orbital degrees of freedom is exhibited in this system: the transverse spatial profile of the output photons may be continuously manipulated by tuning the polarization parameters of the input photons, in such a way that the HOMI between the photons remains stable. An interesting corollary to this work is the possibility of demonstrating in a simple experimental system that HOMI may occur between distinguishable input modes.

  18. Formes hémorragiques de Dengue observées dans le service des maladies infectieuses du CHU Yalgado Ouédraogo, Burkina Faso

    PubMed Central

    Mamoudou, Savadogo; Boushab, Boushab Mohamed

    2016-01-01

    La dengue est une arbovirose ré émergente dans les pays tropicaux. Sa forme hémorragique peut s'accompagner d'une défaillance circulatoire pouvant conduire à un choc hypovolémique, souvent fatal. Nous rapportons une série de trois cas de formes hémorragiques de dengue observées dans le service des maladies infectieuses du CHU Yalgado Ouédraogo de Ouagadougou dont l'objectif est de décrire les caractéristiques épidémiologiques cliniques et évolutives. Les cas étaient des jeunes de sexe féminin dont l’âge variait entre 27 ans et 43 ans, résidant dans la ville de Ouagadougou. Malgré de multiples transfusions de concentrées plaquettaires et un traitement symptomatique, nous déplorons un cas de décès. Le développement d'antiviraux et la mise au point de nouveaux vaccins constituent une lueur d'espoir pour prévenir la létalité due à cette maladie. PMID:27303584

  19. Improvement and Comparative Assessment of a New Hydrological Modelling Approach for the Ouémé River Basin (Bénin), West Africa

    NASA Astrophysics Data System (ADS)

    GABA, C. O. U.

    2015-12-01

    Assessing water resources is still an important issue especially in the context of climatic changes. Although numerous hydrological models exist, new approaches are still under investigation. In this context, we propose a new modelling approach based on the Physics Principle of Least Action. A first version of a Least Action based model, in its deterministic version has already given very good results on simulating the Bétérou catchment in the Ouémé basin, Benin. The paper presents new hypotheses to go further in the model development with a view of widening its application. The improved version of the model MODYPMA was applied on 22 subcatchments in Africa, in Bénin, Côte d'Ivoire, Ethiopia; in Europe, and in the USA. Its performance was compared to two well known lumped conceptual models, the GR4J and HBV models. The model could be successfully calibrated and validated; it shows a good performance for a range of scales but a limited applicability to catchments smaller than 500 km2 . The analysis revealed that the three models have similar performance and timing errors. The parameter uncertainty was analysed using the GLUE methodology. It is concluded that model uncertainty is higher during high flows and that uncertainty analysis should include the uncertainty of the discharge data. Finally, some aspects that further research must address are brought out.

  20. From the model of El Sistema in Venezuela to current applications: learning and integration through collective music education.

    PubMed

    Majno, Maria

    2012-04-01

    Over the last years, El Sistema--the Venezuelan project started in 1975 and now acknowledged worldwide as the most significant example of collective music education--has inspired a profusion of remarkable initiatives on all continents. From the original impulse by founder José Antonio Abreu, strong social principles of integration are combined with specific musical approaches to achieve individual empowerment as a large-scale alternative to endemic juvenile crime, counteracting the risk factors of social unease, serving as a stimulating example toward emancipation, and providing professional opportunities to the talented. Such a network, in turn, proves to be a powerful instrument of cultural progress: the tenets of "Sistema" become shared values able to foster development, reaching into issues of disability and rehabilitation. This paper presents continuities and contrasts in various ramifications of such a successful trend and outlines perspectives for further impact of this powerful transformational agent. PMID:22524340

  1. Modelizacion, control e implementacion de un procesador energetico paralelo para aplicacion en sistemas multisalida

    NASA Astrophysics Data System (ADS)

    Ferreres Sabater, Agustin

    Cualquier sistema electronico que incluya un procesado o tratamiento de la senal, y ademas, algun tipo de actuador mecanico generalmente necesita, como minimo, dos tensiones diferentes de alimentacion. Excluyendo los sistemas de alimentacion distribuida, la solucion tecnica mas utilizada para proporcionar dos o mas tensiones consiste en las fuentes de alimentacion multisalida. En una fuente de alimentacion multisalida los diferentes circuitos que conforman cada salida comparten un mismo transformador de potencia optimizando coste, masa, y volumen. Las ventajas obtenidas con este procedimiento tienen en su contra el efecto que sobre cada salida individual provocan las demas en su conjunto debido, principalmente, a los efectos de los elementos parasitos de los componentes. Un cambio de carga en una de las salidas produce un transitorio que es visto por todas las demas como un efecto de impedancia cruzada, y al final del transitorio, la tension de cada salida es diferente respecto a la que tenian antes del transitorio. Este ultimo resultado se conoce como regulacion cruzada. La disminucion de los efectos de la regulacion cruzada ha sido objeto de estudio durante los ultimos anos. El objetivo ha sido el desarrollo de distintas estrategias que permiten, desde disminuir los efectos de la regulacion cruzada hasta los niveles deseables, a eliminarla completamente. El resultado final suele suponer una penalizacion sobre el diseno del sistema directamente proporcional al grado de regulacion a conseguir en las distintas salidas. Entre las soluciones propuestas para eliminar la regulacion cruzada las tecnicas de post-regulacion se han consolidado como la opcion mas aceptada ya que, pueden aplicarse a cualquier convertidor y no suponen ninguna complejidad adicional a la hora de plantear el diseno. En esta Tesis Doctoral se abordara el estudio de la tecnica conocida como postregulacion mediante transformador controlado, que si bien se ha empleado en convertidores resonantes, su

  2. Reducing the basin vulnerability by land management practices under past and future climate: a case study of the Nam Ou River Basin, Lao PDR

    NASA Astrophysics Data System (ADS)

    Maharjan, M.; Babel, M. S.; Maskey, S.

    2014-08-01

    This research evaluates different land management practices for the Nam Ou River Basin in Northern Laos for reducing vulnerability of the basin due to erosion and sediment yield under existing and future climate conditions. We use climate projection data (precipitation and temperature) from three general circulation models (GCMs) for three greenhouse gas emission scenarios (GHGES), namely B1, A1B and A2 and three future periods, namely 2011-2030, 2046-2065 and 2080-2099. These large resolution GCM data are downscaled using the Long Ashton Research Station-Weather Generator (LARS-WG). The Soil and Water Assessment Tool (SWAT), which is a process based hydrological model, is used to simulate discharge and sediment yield and a threshold value of annual sediment yield is applied to identify vulnerable sub-basins. Results show that the change in the annual precipitation is expected to be between -7.60 to 2.64% in 2011-2030, -8.98 to 11.85% in 2046-2065, and -11.04 to 25.84% in 2080-2099. In the meantime, the changes in mean monthly temperature vary from 0.3 to 1.3 °C in the 2011-2030, 1.3 to 2.9 °C in the 2046-2065 and 1.9 to 4.9 °C in the 2080-2099. Five sub-basins are identified vulnerable (critical) under the current climate. Our results show that terracing is the most effective land management practice to reduce sediment yield in these sub-basins followed by strip-cropping and filter strip. Appropriate land management practices applied under future climate scenarios show significant reduction in sediment yield (i.e. up to the tolerance limit) except for some sub-basins. In these exceptional sub-basins, designing an optimum combination of management practices is essential to reduce the vulnerability of the basin.

  3. Comparative study of microflora in Rhizospheric soils of Argania spinosa and Acacia raddiana of the arid zone from Oued El Ma (Tindouf)

    NASA Astrophysics Data System (ADS)

    Tissouras, Fatiha; Habib, Semira; Missoum, Malika; Louacini, Braim Kamel

    2016-04-01

    Desert soils occupy a large area in Algeria (80Moreover, exploitation of the Saharan soil microorganisms has several interests and especially in maintaining the ecological equilibrium of ecosystems. Unfortunately, few of microbiological studies have been conducted so far about the Saharan soil Algerian, with the exception of some work done on the desert soils in the region of Beni Ounif. This work falls within the framework of Project CNEPRU F02320100009. The study focuses on an evaluation of the main germs rhizosphere soils from Argania spinosa and Acacia raddiana of the region of Oued El-ma (wilaya of Tindouf), located in southwest Algeria, followed by physicochemical analysis of some parameters (soil texture, pH, moisture content, organic matter). The results reveal that both rhizosphere soils have a sandy silt texture of alkali pH, with very low water content slightly different. Organic material of the rate varies from 0.2 to 1The type of vegetation influences positively the quantity and the dynamics of microbial population. Indeed, the two soils have an interesting microbial diversity, with densities of azotobacters, fungi, aerobic bacteria and actinomycetes are very high, followed germs ammonifiants, nitrifying and denitrifying. In the presence of Argania spinosa the microbial growth is most important (6.53 × 107 germs /g soil), compared with Acacia raddiana (3.13 × 107 germs /g). This shows the stimulating effect of the vegetation on the increase in the rate of these microorganisms in the soil. Well as the strong Fitness of adaptation the microbial biomass to drought. Keywords: Argania spinoza; Acacia raddiana; rhizospheric soil; microbiology evaluation.

  4. [Effects of saline-alkali stress on electrical impedance spectroscopy parameters and ion contents in shoots of Ping'ou hybrid hazelnut].

    PubMed

    Zhang, Li; Jia, Zhi-Guo; Ma, Qing-Hua; Zhang, Gang; Wang, Gui-Xi

    2014-11-01

    To study the adaptability to salt-alkaline stress of Ping'ou hybrid hazelnut, 'Liaozhen 3' shoots which were treated with three types of stress neutral NaCl, alkaline Na2CO3, and mixed salt-alkali, and the changes in electrical impedance spectroscopy (EIS) parameters and mineral ion contents were subsequently determined. The correlations between the EIS parameters and mineral ion contents were analyzed. The results showed that with the increasing level of NaCl, specific high- frequency resistance (r), specific low-frequency resistance ( r(l)), specific intracellular resistance (r(i)) and specific extracellular resistance (r(e)) of shoots decreased firstly, then increased, and finally decreased again. However, these parameters increased gradually with the increasing level of Na2CO3, while r(l) and r(e) decreased slowly in the mixed salt-alkali treatments. The Na+ contents of shoots increased significantly under the three salt-alkali stresses with the order of NaCl stress > mixed salt-alkali stress > Na2CO3 stress. Furthermore, Na2CO3 stress resulted in the decreases in the contents of three elements Zn, B and Ca. The significant negative correlation was found between the sum of five cations and four EIS parameters r(l), r(e), relaxation time (τ) , and distribution coefficient of relaxation time (ψ). The shoots of 'Liaozhen 3' might be tolerant of Na2CO3 stress of 200 mmol · L(-1), while they could be resistant to NaCl stress of 100-150 mmol · L(-1). PMID:25898608

  5. Les fractures de jambe à fibula intact: traitement orthopédique ou enclouage centromédullaire? (étude comparative à propos de 60 cas)

    PubMed Central

    Abouchane, Merouane; Fadili, Assia; Belmoubarik, Amine; EL Andaloussi, Yassir; Nechad, Mohammed

    2015-01-01

    La fracture de jambe à fibula intact (FJFI) est caractérisée par un potentiel de déplacement minime ainsi le pronostic semble bon, souvent associées à des difficultés de réduction de consolidation ou de cal vicieux. Notre but est de comparer les résultats du traitement orthopédique et de l'enclouage centromédullaire (ECM). Entre janvier 2006 et janvier 2011, on a traité 60 fractures de jambe à fibula intact. 31 patients ont bénéficié d'un ECM, dont 14 fois était statique, 16 fois dynamique et simple une fois, avec un appui compris entre le 2eme jour (pour la plupart des patients) et la sixième semaine. 29 patients ont bénéficiés d'un traitement orthopédique après réduction par plâtre cruro-pédieux avec libération du genou après 4 semaines avec appui total chez la plupart des patients. La durée de consolidation été de 4 mois en moyenne pour les patients traites par ECM et de 6 mois pour les patients traites orthopédiquement. On a noté 3 cas de pseudarthrose dans notre série d’étude soit 5%: 2 observées chez le groupe de l'ECM soit 6,4% et un cas pour le groupe du traitement orthopédique soit 3,8%. 6 cas de déplacement secondaires ont été note chez les patients traites orhtopédiquement à j15 du traitement, pour 5 patients le déplacement été jugé tolérable et pour un seul patient (trouble angulaire supérieur à 10°) ayant nécessité un ECM. 13 cas soit 54% de cal vicieux angulaire supérieur à 10 dans notre série tous traités orthopédiquement versus aucun cas de cal vicieux chez les patients du groupe du traitement par ECM. Cliniquement: tous les patients traités par ECM ont présenté une mobilité du genou et de la cheville normale. Les patients traités orthopédiquement ont tous bénéficié d'une rééducation du genou libération du genou et confection d'un plâtre type Sarmiento et celle de la cheville après son ablation définitive, ainsi aucun de nos patients n'a gardé une raideur après avoir termin

  6. Approche au diagnostic de la maladie cœliaque chez les patients ayant une faible densité minérale osseuse ou des fractures de fragilité

    PubMed Central

    Rios, Lorena P.; Khan, Aliya; Sultan, Muhammad; McAssey, Karen; Fouda, Mona A.; Armstrong, David

    2013-01-01

    Résumé Objectif Présenter aux cliniciens une mise à jour sur le diagnostic de la maladie cœliaque (MC), ainsi que des recommandations sur les indications de procéder au dépistage de la MC chez les patients présentant une faible densité minérale osseuse (DMO) ou des fractures de fragilité. Qualité des données Un groupe de travail multidisciplinaire a élaboré des questions cliniquement pertinentes relativement au diagnostic de la MC servant de fondement à une recherche documentaire dans les bases de données MEDLINE, EMBASE et CENTRAL (de janvier 2000 à janvier 2009) à l’aide des mots clés en anglais celiac disease, osteoporosis, osteopenia, low bone mass et fracture. Les ouvrages scientifiques existants comportent des études de niveaux I et II. Message principal La prévalence estimée de la MC asymptomatique est de 2 % à 3 % chez les personnes qui ont une faible DMO. Par ailleurs, un dépistage ciblé est recommandé pour les patients qui ont des T-scores de −1,0 ou moins à la colonne vertébrale ou aux hanches ou des antécédents de fractures de fragilité associées à des symptômes ou à des problèmes reliés à la MC, des antécédents familiaux de MC ou de bas niveaux de calcium urinaire, une insuffisance en vitamine D et des niveaux à la hausse d’hormones parathyroïdiennes en dépit d’un apport suffisant en calcium et en vitamine D. Le dépistage de la MC devrait se faire pendant que le sujet consomme un régime alimentaire contenant du gluten. On procède au dépistage initial par le dosage d’immunoglobuline (Ig) A antitransglutaminase en utilisant la transglutaminase tissulaire humaine recombinante ou une autre transglutaminase tissulaire, en association avec l’immunofluorescence des IgA anti-endomysium. Une biopsie du duodénum est nécessaire pour confirmer le diagnostic de la MC. Le typage des antigènes des leucocytes humains peut aider à confirmer ou à exclure le diagnostic de la MC dans les cas où la s

  7. Calibração do sistema imageador do telescópio MASCO

    NASA Astrophysics Data System (ADS)

    Mejía, J.; D'Amico, F.; Villela, T.; Braga, J.

    2003-08-01

    O MASCO (MÁScara COdificada) é um telescópio imageador de raios-X e gama atualmente configurado para operar na faixa de 50 a 600 keV com uma resolução angular de 14 minutos de arco num campo de visada total circular de 23,5° de diâmetro. O MASCO está totalmente operacional e deverá ser lançado em um balão estratosférico no segundo semestre de 2003 para realizar observações durante ~20 horas a ~40 km de altitude. O telescópio utiliza uma máscara codificada de padrão uniformemente redundante modificado (MURA) de dimensões 19 ´ 19. Esse padrão pertence a uma subclasse de MURAs que apresenta anti-simetria de 90° e conseqüentemente permite a utilização da técnica de subtração de variações sistemáticas de ruído de fundo através de utilização da configuração anti-máscara, obtida com uma simples rotação da máscara. Neste trabalho apresentamos resultados de calibrações em laboratório que tiveram como objetivo testar o sistema imageador. Imagens de fontes radioativas foram obtidas com o telescópio em configuração de vôo, com a máscara girando. Serão discutidos os resultados desses testes e as técnicas desenvolvidas para eliminar ambigüidades de posição de fontes, otimização da relação sinal-ruído e observação de fontes fora do campo totalmente codificado. O sistema de máscara/antimáscara mostrou-se capaz de aumentar a relação sinal-ruído de ~60% para fontes intensas (100 s). Com a máscara girando, a técnica de reconstrução de imagens desenvolvida identificou a posição exata da fonte e não introduziu perda de sensibilidade. Imagens de uma fonte colocada a 8,3° - fora do campo totalmente codificado do telescópio -, mostraram uma diminuição de ~40% na relação sinal/ruído em relação ao centro do campo de visada, o que se deve à codificação incompleta pela máscara e à absorção parcial do fluxo pelos detectores de blindagem.

  8. Complications du diverticule de Meckel (DM) chez l'adulte: à propos de 11 cas au CHU-Yalgado Ouédraogo au Burkina Faso

    PubMed Central

    Ouangré, Edgar; Zida, Maurice; Bazongo, Moussa; Sanou, Adama; Bonkoungou, Gilbert Patindé; Doamba, Rodrigue Namékinsba; Sawadogo, Elie Yamba; Ouédraogo, Sidziguin; Zongo, Nayi; Traore, Si Simon

    2015-01-01

    Le diverticule de Meckel (DM) est la persistance partielle du canal omphalomésentérique. Ses complications sont rares. Le diagnostic est le plus souvent per opératoire. L'objectif a été de décrire les complications du diverticule de Meckel chez l'adulte dans le service de chirurgie générale et digestive du CHU Yalgado Ouédraogo. Il s'est agi d'une étude transversale descriptive sur 10 ans (janvier 2004-décembre 2013) portant sur les dossiers des patients âgés de plus de 15 ans ayant présenté un DM compliqué. Durant la période d’étude, 11 cas ont été colligés. L'incidence annuelle a été de 11 cas. Nous avons noté une prédominance masculine avec un sex-ratio de 4,5. L’âge moyen des patients était de 29,8 ans. Le diagnostic préopératoire a été dans huit cas une occlusion intestinale aiguë, une appendicite aiguë dans deux cas, une péritonite aiguë généralisée dans un cas. Il a été diagnostiqué en peropératoire une occlusion intestinale dans neuf cas; une diverticulite dans un cas et un cas de perforation du DM. Tous les DM avaient été réséqués dont huit résections segmentaires iléales emportant le DM et trois résections cunéiformes. Tous les DM étaient situés à moins d'un mètre de la jonction iléo-caecale. L'histologie réalisée dans deux cas avait conclu à une diverticulite. Les suites opératoires ont été simples dans neuf cas, compliquées dans deux cas dont une éventration et un décès. Les complications du diverticule de Meckel sont rares. Le diagnostic préopératoire est difficile. Le traitement est essentiellement chirurgical. PMID:26958137

  9. Projeto do sistema anti-ressonante da fiação dos transdutores para o detector Mario Schenberg

    NASA Astrophysics Data System (ADS)

    Vieira, S. J.., Jr.; Melo, J. L.

    2003-08-01

    O detector de ondas gravitacionais Mario Schenberg está sendo projetado e construído pelo grupo Gráviton. Sua construção está ocorrendo no Laboratório de Estado Sólido e Baixas Temperaturas (LESBT) da Universidade de São Paulo, na cidade de São Paulo. Esse detector possui uma massa ressonante esférica de cobre-alumínio, com 65 cm de diâmetro, pesando aproximadamente 1150 Kg, suspensa por um sistema de isolamento vibracional, que se encontra em fase de testes preliminares. A real eficácia desse sistema, entretanto, só poderá ser comprovada quando o detector estiver aparelhado com, pelo menos, um transdutor eletromecânico de altíssima sensibilidade acoplado à massa ressonante. Neste momento, não só este sistema de isolamento vibracional será posto em teste, como o do projeto da fiação que transporta os sinais de microondas até os transdutores e destes para a pré-amplificação. Apesar dessa fiação ter sido projetada para não apresentar nenhum contato com a superfície esférica da antena, de maneira a não haver nenhuma transmissão de ruído vibracional do laboratório para esta, deve-se minimizar o ruído microfônico produzido nessa fiação por oscilações mecânicas, uma vez que ela não utiliza nenhum sistema de isolamento vibracional. Com o intuito de resolver este problema, projetamos uma estrutura, formada por pequenos cilindros conectados por barras, a qual não terá nenhuma ressonância mecânica na faixa de freqüências de interesse para detecção (3000 - 3400 Hz). Desta forma, as vibrações nessa faixa não serão amplificadas. O projeto foi feito usando iterativamente, de maneira a otimizar os resultados obtidos, o programa de elementos finitos Msc/Nastran. Através de simulações feitas neste programa, determinamos os parâmetros geométricos ideais a serem utilizados, os quais proporcionam a maior região espectral de interesse livre de ressonâncias.

  10. Transferências orbitais dentro do modelo quase bicircular no sistema Terra-Lua-Sol

    NASA Astrophysics Data System (ADS)

    Corrêa, A. A.; de Almeida Prado, A. F. B.; Stuchi, T. J.; Beaugé, C.

    2003-08-01

    O problema quase bicircular planar consiste na determinação da dinâmica de um corpo, de massa desprezível, que se move sob o campo gravitacional de três corpos. No caso estudado, o quarto corpo é considerado um satélite artificial e os demais são a Terra, a Lua e o Sol, formando o sistema de três corpos. Este modelo permite a construção de uma hamiltoniana similar a do problema restrito de três corpos (PRTC), incluindo termos periódicos não autônomos, provenientes da presença do Sol, portanto pode ser entendido como uma perturbação ao PRTC. Suas órbitas periódicas aparecem isoladas e possuem o mesmo período solar. Os pontos de equilíbrio colineares possuem o mesmo caráter de estabilidade linear dos pontos lagrangianos (L1, L2 e L3) do PRTC, sendo do tipo sela x centro x centro, instável na direção x e estáveis nas direções y e z. As órbitas periódicas tridimensionais ao redor do ponto colinear é chamada órbita Halo. O objetivo deste trabalho é determinar órbitas de transferências de baixo consumo de combustível para um veículo espacial partindo de uma órbita de estacionamento ao redor da Terra em direção a uma órbita Halo do ponto L1, situado entre a Terra e Lua. Esta tarefa pode ser transformada no problema de valor de contorno: dado um ponto inicial na órbita de estacionamento, um ponto final na órbita halo e o tempo de transferência, deseja-se obter a trajetória que liga estes dois pontos e que minimize os incrementos de velocidade do veículo. Essas transferências são realizadas baseadas no método de Lambert e analisadas de modo a fornecer um baixo consumo. Posteriormente, é feita uma comparação de consumo com as órbitas de transferência equivalentes do PRTC.

  11. Cas rare de rupture bilatérale des tendons d'Achille sans notion de tendinopathie ou de chirurgie de la cheville chez un jeune sportif: à propos d'un cas et revue de la literature

    PubMed Central

    Belmoubarik, Amine; Abouchane, Merouane; Mahraoui, Mohamed Amine

    2015-01-01

    Les lésions du tendon d'Achille sont plus fréquentes que celles du tendon quadricipital ou patellaire. Les lésions bilatérales sont par contre plus rares et sont souvent associées à une notion de tendinopathie, d'injection de corticoïdes ou de maladies systémiques tels que le lupus érythémateux, l'ostéomalacie ou l'insuffisance rénale chronique. Nous rapportons le cas d'un patient de 34 ans victime d'une rupture bilatérale des tendons d'Achille suite à une réception de saut lors de la pratique de gymnastique. Le patient n’était pas suivi pour maladie de système ou mis sous corticothérapie ou fluoroquinolones. Le diagnostic a été suspecté devant une dépression anormalement creusant le relief sous cutané des deux tendons d'Achille avec une impossibilité de flexion dorsale des deux chevilles en association à un signe de Thompson bilatéralement positif. L’échographie a confirmé le diagnostic. Le patient a été traité par laçage et suture tendineuse à ciel ouvert. La rupture bilatérale du tendon d'Achille est rare. La plupart des patients rapportent une notion de maladie systémique ou un antécédent de chirurgie du genou. Nous rapportons le cas d'une lésion rare dans la littérature, une rupture bilatérale des tendons achiléens sans notions de maladies auto-immunes ni de traitement aux corticoïdes. Les lésions bilatérales présentent certaines particularités thérapeutiques et évolutives. En effet, deux difficultés sont à noter la première réside dans l'absence de référence comparative pour régler et apprécier l’équin physiologique lors de la réparation tendineuse. La deuxième difficulté est l'obligation de différer l'appui à 45 jours. Ce qui est contraignant pour le patient. La technique de réparation à ciel ouvert couplée à une immobilisation en équin protégeant la suture nous a donné des résultats satisfaisants. PMID:26140066

  12. Slug Test Characterization Results for Multi-Test/Depth Intervals Conducted During the Drilling of CERCLA Operable Unit OU ZP-1 Wells 299-W10-33 and 299-W11-48

    SciTech Connect

    Newcomer, Darrell R.

    2007-09-30

    Slug-test results obtained from single and multiple, stress-level slug tests conducted during drilling and borehole advancement provide detailed hydraulic conductivity information at two Hanford Site Operable Unit (OU) ZP-1 test well locations. The individual test/depth intervals were generally sited to provide hydraulic-property information within the upper ~10 m of the unconfined aquifer (i.e., Ringold Formation, Unit 5). These characterization results complement previous and ongoing drill-and-test characterization programs at surrounding 200-West and -East Area locations (see Figure S.1).

  13. Un exemple de volcanisme calco-alcalin de type orogénique mis en place en contexte de rifting (Cambrien de l'oued Rhebar, Meseta occidentale, Maroc)

    NASA Astrophysics Data System (ADS)

    El Hadi, Hassan; Tahiri, Abdelfatah; Simancas Cabrera, Fernando; González Lodeiro, Francisco; Azor Pérez, Antonio; Jesús Martínez Poyatos, David

    2006-03-01

    The Middle Cambrian calc-alkaline Oued Rhebar volcanic complex (western Meseta, Morocco) compares with rocks originated in orogenic contexts. The La/Nb ratios are relatively high (5.2), suggesting a lithospheric mantle origin. The La/Ta ratios, higher than 26, and the negative Nb anomaly indicate a lithospheric source contaminated by the continental crust. These rocks were generated in the Mesetian Mid-Cambrian rift and would have inherited their orogenic signature from the partial melting of a previously metasomatized mantle. To cite this article: H. El Hadi et al., C. R. Geoscience 338 (2006).

  14. Resonances and Tides in Natural Satellites Systems. (Breton Title: Ressonâncias e Marés em Sistemas de Satélites Naturais.) Resonancias y Mareas en Sistemas de Satélites Naturales

    NASA Astrophysics Data System (ADS)

    Callegari, Nelson, Jr.

    2006-12-01

    In this work we describe some aspects of the dynamics of the mean-motion resonances. Emphasis to the case of resonances between regular satellites of the giant planets will be given, even so some aspects of the physics of the resonances in extra-solar planetary systems are also briefly treated. The role of the resonances in satellites systems is discussed through examples, showing how certain resonances, and its relations with the tidal dissipation effects, can be the key of the explanation of some phenomena still not explained in the Solar System. Amongst some examples we highlight the problem of the resurfacing of Enceladus, the existence of active volcanoes in Io, and the possible existence of the subsurface ocean in Europe. This work has as objective the divulgation of some topics in Celestial Mechanics and Planetary Sciences for an undergraduate public in exact sciences, as Astronomy and Physics, and not their detailed description. Neste trabalho descrevemos alguns aspectos da dinâmica de ressonâncias de movimentos médios. Será dada ênfase maior ao caso de ressonâncias entre satélites regulares dos planetas gigantes, embora alguns aspectos da física das ressonâncias em sistemas planetários extra-solares também sejam discutidos brevemente. A importância do estudo de ressonâncias em sistemas de satélites é discutida mais detalhadamente através de exemplos, mostrando como certas ressonâncias e suas relações com efeitos de dissipação de maré podem ser a chave de parte da explicação de alguns fenômenos ainda não explicados no Sistema Solar. Dentre vários exemplos destacamos o problema da remodelagem da superfície do satélite Enceladus, a existência de vulcões ativos em Io, e a possível existência do oceano subterrâneo em Europa. Este trabalho tem como objetivo a divulgação de alguns tópicos de Mecânica Celeste e Planetologia para um público de nível de graduação em disciplinas na área de exatas, em especial Astronomia e F

  15. Obstáculos a la adherencia y retención en los sistemas de salud público y privado según pacientes y personal de salud

    PubMed Central

    Arístegui, Inés; Dorigo, Analía; Bofill, Lina; Bordatto, Alejandra; Lucas, Mar; Cabanillas, Graciela Fernández; Sued, Omar; Cahn, Pedro; Cassetti, Isabel; Weiss, Stephen; Jones., Deborah

    2016-01-01

    Resumen Introducción el Programa Nacional de Sida garantiza el acceso universal a los antirretrovirales, aun así las personas que reciben medicamentos a través del sistema público no logran obtener una carga viral indetectable en la misma proporción que los pacientes del sistema privado. Este estudio cualitativo tiene como objeto identificar los factores asociados a la adherencia y retención en la cascada de atención de VIH de los sistemas de salud público y privado de Buenos Aires, según las percepciones de pacientes y del personal de salud. Métodos se registraron datos cualitativos de 12 entrevistas semi-estructuradas a informantes clave y 4 grupos focales de pacientes y personal de salud tanto del sistema público como privado. Se codificaron y analizaron temas predeterminados sobre adherencia, utilizando el software QRS Nvivo9® de análisis de datos cualitativos. Resultados pacientes y personal de salud de ambos sistemas coinciden en la importancia del estigma asociado al VIH, la relación médicopaciente, la comunicación entre ambos y la división de responsabilidades en relación al tratamiento como aspectos fundamentales para la adherencia y retención en la cascada de atención. Se observan diferencias entre los sistemas en la forma en que algunos de estos aspectos actúan. Las barreras estructurales se presentan como principales obstáculos del sistema público. Discusión se resalta la necesidad de intervenciones focalizadas en la díada médico-paciente que considere las particularidades de cada sistema de atención para facilitar el compromiso del paciente en la adherencia. PMID:26878024

  16. The Development of Musical Skills of Underprivileged Children Over the Course of 1 Year: A Study in the Context of an El Sistema-Inspired Program.

    PubMed

    Ilari, Beatriz S; Keller, Patrick; Damasio, Hanna; Habibi, Assal

    2016-01-01

    Developmental research in music has typically centered on the study of single musical skills (e.g., singing, listening) and has been conducted with middle class children who learn music in schools and conservatories. Information on the musical development of children from different social strata, who are enrolled in community-based music programs, remains elusive. This study examined the development of musical skills in underprivileged children who were attending an El Sistema-inspired program in Los Angeles. We investigated how children, predominantly of Latino ethnicity, developed musically with respect to the following musical skills - pitch and rhythmic discrimination, pitch matching, singing a song from memory, and rhythmic entrainment - over the course of 1 year. Results suggested that participation in an El Sistema-inspired program affects children's musical development in distinct ways; with pitch perception and production skills developing faster than rhythmic skills. Furthermore, children from the same ethnic and social background, who did not participate in the El Sistema-inspired music program, showed a decline in singing and pitch discrimination skills over the course of 1 year. Taken together, these results are consistent with the idea of musical development as a complex, spiraling and recursive process that is influenced by several factors including type of musical training. Implications for future research are outlined. PMID:26869964

  17. The Development of Musical Skills of Underprivileged Children Over the Course of 1 Year: A Study in the Context of an El Sistema-Inspired Program

    PubMed Central

    Ilari, Beatriz S.; Keller, Patrick; Damasio, Hanna; Habibi, Assal

    2016-01-01

    Developmental research in music has typically centered on the study of single musical skills (e.g., singing, listening) and has been conducted with middle class children who learn music in schools and conservatories. Information on the musical development of children from different social strata, who are enrolled in community-based music programs, remains elusive. This study examined the development of musical skills in underprivileged children who were attending an El Sistema-inspired program in Los Angeles. We investigated how children, predominantly of Latino ethnicity, developed musically with respect to the following musical skills – pitch and rhythmic discrimination, pitch matching, singing a song from memory, and rhythmic entrainment – over the course of 1 year. Results suggested that participation in an El Sistema-inspired program affects children’s musical development in distinct ways; with pitch perception and production skills developing faster than rhythmic skills. Furthermore, children from the same ethnic and social background, who did not participate in the El Sistema-inspired music program, showed a decline in singing and pitch discrimination skills over the course of 1 year. Taken together, these results are consistent with the idea of musical development as a complex, spiraling and recursive process that is influenced by several factors including type of musical training. Implications for future research are outlined. PMID:26869964

  18. Experiências internacionais da aplicação de sistemas de apoio à decisão clínica em gastroenterologia

    PubMed Central

    Tenório, Josceli Maria; Hummel, Anderson Diniz; Sdepanian, Vera Lucia; Pisa, Ivan Torres; de Fátima Marin, Heimar

    2015-01-01

    Objetivo Descrever as experiências recentes com a aplicação de sistemas de apoio à decisão clínica em gastroenterologia, de forma a estabelecer o nível de desenvolvimento, testes e vantagens conferidas à prática médica com a introdução desses softwares. Métodos Foi realizada busca nas bases de dados PubMed, LILACS e ISI Web of Knowledge, utilizando termos relacionados à sistemas de apoio à decisão e à gastroenterogia, incluindo artigos originais publicados no período entre 2005 e 2010. Foram recuperadas 104 publicações, na busca inicial e, após a aplicação dos critérios de inclusão e exclusão, foram eleitos nove estudos para leitura do texto completo. Resultados Os sistemas de apoio à decisão clínica apresentam grande multiplicidade de problemas clínicos e investigação de doenças. Em 89% dos casos, são descritos modelos experimentais para o desenvolvimento de sistemas de apoio à decisão clínica. A descrição dos resultados obtidos por técnicas de inteligência artificial em 78% das publicações. Em dois dos estudos foram realizadas comparações com o médico e em apenas uma publicação um estudo controlado foi descrito, mostrando evidências de melhorias na prática médica. Conclusão Os estudos mostram potenciais benefícios dos sistemas de apoio à decisão clínica à prática médica, porém, estudos controlados em ambiente real devem ser realizados para comprovar esta perspectiva. PMID:26491625

  19. Pedagogical Research at the UK OU.

    ERIC Educational Resources Information Center

    Chambers, Ellie

    This lecture describes the organization and kinds of pedagogical research undertaken in the United Kingdom Open University and, through a case study of educational research in the recently introduced Arts Foundation Course (A102), to show how one type of research can contribute to course organization and development. The Institute of Educational…

  20. Assessment of the current and future water balance of the Ouémé catchment (Benin) for an integrated water resource management by using the WEAP water planning model

    NASA Astrophysics Data System (ADS)

    Giertz, Simone; Diekkrüger, Bernd; Höllermann, Britta

    2010-05-01

    Today, fresh water has already become a critically scarce resource in many regions of the world. In many developing countries insufficient water supply infrastructure aggravates this problem. With the ongoing global change and population growth water security will become one of the major problems in the 21st century. Regarding the annual water balance the West African Country Benin is not suffering from physical water scarcity. Nevertheless, investigations show that water scarcity occurs at the local scale, especially at the end of the dry season. This is caused by reduced water availability in this period and particularly by the inadequate water supply infrastructure. Facing the impacts of climate and socio-economic change, an assessment of the national water resources is an important step to assure a sustainable water resource management and to satisfy the raising water demand of Benin in the future. In the presented study the WEAP water planning model was used to analyse the current and future water balance of Benin's largest catchment Ouémé. To take into account the possible impacts of climate and socio-economic change, two IPCC scenarios (A1B and B1) and three socio-economic scenarios were simulated for the time period 2002-2025. The results show that the pressure on Benin's water resources will increase, due to population growth and changing socio-economic conditions. This leads to a greater competition for surface water especially during the dry season. Improving the access to groundwater is an alternative; however, financial and institutional constraints hinder such a development. Furthermore, declining catchment inflows and groundwater recharge aggravate the situation and require an adapted groundwater management. Beside the scenario results the presentation will also examine the uncertainties of the modelling process with WEAP. Furthermore, the suitability of the model in supporting a sustainable and integrated water resources management in developing

  1. Sédimentologie et évidence d'une tectonique Tardi-Hercynienne d'âge Permien Inférieur dans le bassin des Ida Ou Ziki; sud-ouest du massif ancien du Haut-Atlas (region d'Argana, Maroc)

    NASA Astrophysics Data System (ADS)

    Saber, Hafid

    1994-08-01

    The Permian Ida Ou Ziki sequence, approximately 1200 m thick, is detrital in origin. Sedimentological data clearly indicate a fluviatile environment. The palaeocurrents show that during the infilling of the basin, the detrital source region was constantly to the north. From a study of the clay minerals, based on the dominance of illite and not inconsiderable proportions of kaolinite and chlorite, a wet warm and humid climate is indicated. The Ida Ou Ziki basin has been affected by synsedimentary post-Hercynian movement. It suggests an important subsidence phase controlled by the Tirkou fault, and by disturbances affecting the lower part of the succession. Listric faults and small-scale grabens associated with slumping gave an extensional direction approximately to the NW-SE. As part of this extensional phase, the basin was subjected to a post-depositional pre-Upper Triassic northerly regional compression

  2. Epidémiologie et prise en charge des infections du per-partum à la maternité du centre hospitalier départemental de l'Ouémé-Plateau au Bénin

    PubMed Central

    Saizonou, Jacques; Ouédraogo, Laurent; Paraiso, Moussiliou Noël; Ayélo, Paul; Kpozèhouen, Alphonse; Daraté, René; Traoré, Esther

    2014-01-01

    Introduction La présente étude avait pour objectif de mesurer l'ampleur des infections du per-partum à la maternité du Centre Hospitalier Départemental de l'Ouémé-Plateau d'analyser les conditions de survenue et de prise en charge dans la perspective de l'amélioration des soins et services maternels et néonataux. Méthodes Une étude descriptive et analytique a été conduite de Août 2009 à Février 2010 et a impliqué 110 mères victimes d'infections du per-partum; elles ont été soumises à un questionnaire durant tout leur séjour hospitalier; des observations des pratiques de prise en charge des prestataires de soins ont été menées et des registres et autres supports de données sanitaires ont été exploités. L'analyse des données a été effectuée à l'aide du logiciel Epi Info 6.4 dans sa version française. Résultats L'incidence des infections du per-partum était de 5,9 pour 100 accouchements (110/ 1875); les types d'infections les plus incriminés étaient les endométrites (27,3%), les chorioamniotites (18,2%), les infections du site opératoire (12,7%) et les infections urinaires (2,7%). Les examens cliniques ont été relativement acceptables. En revanche, les examens biologiques ont été très insuffisants expliquant l'imprécision importante au niveau des diagnostics. L'antibiothérapie a été instaurée systématiquement. Le taux de mortinaissance était de 25,6% et les enfants de petit poids représentaient 23,2%. Conclusion L'incidence des infections du per-partum dans la présente étude était assez élevée. Des efforts de préventions et de dépistage de ces infections sont nécessaire afin d'améliorer la qualité des soins PMID:25120854

  3. Les manifestations oculaires au cours de la pré-éclampsie sévère ou l’éclampsie au Centre Hospitalier Universitaire Sourô Sanou de Bobo Dioulasso

    PubMed Central

    Diallo, Jean Wenceslas; Méda, Nonfounikoun; Ahnoux-Zabsonré, Ahgbatouhabéba; Ouattara, Souleymane; Yanogo, Armande; Tougouma, Somnoma Jean Baptiste; Somé, Der; Sanou, Jérôme; Dolo, Mariam

    2015-01-01

    La pré-éclampsie sévère est un problème de santé publique. L'atteinte oculaire est une de ses nombreuses complications. Le but de notre travail était de décrire les atteintes oculaires chez les patientes présentant une pré-éclampsie et/ou éclampsie afin de contribuer à leur meilleure prise en charge. Il s'est agi d'une étude transversale descriptive à collecte prospective allant du 1er novembre 2013 au 31 juillet 2014, chez les patientes ayant souffert de pré-éclampsie sévère/éclampsie. Nous avons inclus 127 patientes dans notre étude. La moyenne d’âge des patientes de notre étude était de 26,37 ans (ET= 6,8 ans), avec des extrêmes de 15 et 40 ans. Les tranches d’âge les plus représentées étaient celles de 26 à 30 ans avec 29,1% des cas et celle des 15 à 20 ans avec 25,2%. Le diagnostic de pré-éclampsie sévère a été retenu dans 69,3% des cas. Les primigestes représentaient 40,9% de la population. Les troubles visuels à type de phosphènes ont été observés chez 33,1% des patientes. Nous avons noté un courant granulaire conjonctival dans 41,7%, des lésions du segment postérieur chez 32,3% des patientes. Ces résultats ont été discutés par rapport à la littérature, et nous notons plus de cas d'atteinte rétinienne. Nous n'avons pas trouvé de lien statistiquement significatif entre la tension artérielle à l'admission et le stade de la rétinopathie hypertensive. Les complications oculaires de la pré-éclampsie sévère sont très fréquentes et souvent ignorées. Les atteintes rétiniennes sont fréquentes mais de bon pronostic. PMID:26405485

  4. Patients diabétiques de type 2 hypertendus: préfèrent-ils traiter le diabète ou l'hypertension artérielle?

    PubMed Central

    Aassri, Hind El; El Mghari, Ghizlane; El Ansari, Nawal

    2014-01-01

    Les diabétologues sont confrontés à des diabétiques le plus souvent hypertendus et polypathologiques, les rendant peu observants des différentes thérapeutiques prescrites. Le but de notre étude est d’évaluer l'observance au traitement chez les patients diabétiques hypertendus. Il s'agit d'une étude descriptive prospective transversale. La population est faite de patients diabétiques de type 2 hypertendus vus aux urgences, à la consultation ou hospitalisés au service d'Endocrinologie. L’échantillon est non probabiliste. La population est faite de 61 patients, d'un âge moyen de 48,9 ans avec une hypertension (HTA) de type systolique dans 59%, diastolique dans 16% et systolo-diastolique dans 25% des cas. Les patients sont équilibrés sur le plan glycémique dans 65% des cas, alors que l’équilibre tensionnel n'est atteint que dans 41% des cas. En ce qui concerne l'observance thérapeutique, 24% des patients sont observant totalement au traitement prescrit, 33% ne sont pas observant au traitement et 43% ont une observance partielle au traitement dont 73.68% préfèrent le traitement destiné au diabète et 26,32% prennent le traitement anti hypertenseur. Les facteurs altérant l'observance au traitement médicamenteux sont un surcoût du traitement un nombre élevé de médicaments prescrits, un nombre important de prises quotidiennes de médicaments, une intolérance au traitement et une mauvaise information du patient sur la justification du traitement. Enfin, les patients diabétiques hypertendus sont classés comme patients à haut risque cardiovasculaire ce qui impose l'application de stratégies thérapeutiques parfois lourdes. Cette polymédication entrave la qualité de l'observance thérapeutique des patients ayant une pathologie chronique dont la compliance au traitement constitue la pierre angulaire de la prise en charge, et ce pour plusieurs raisons en particulier d'ordre économique. PMID:25396019

  5. Ouateres ou veces? Emprunt ou etymologie? ("Ouateres" or "Veces"? Borrowing or Etymology?).

    ERIC Educational Resources Information Center

    Calvet, Louis-Jean

    1989-01-01

    The variety of terms used by different cultures for bathroom facilities not only illustrates the problems language poses for travelers but also opens a discussion of the distinction between linguistic borrowing and etymology. (MSE)

  6. Cobertura de los sistemas de pensiones y factores asociados al acceso a una pensión de jubilación en México

    PubMed Central

    Murillo-López, Sandra; Venegas-Martínez, Francisco

    2016-01-01

    Resumen Objetivos: obtener estimaciones de indicadores de cobertura de las pensiones por jubilación o retiro para la población mexicana de 65 y más años, y evaluar el impacto que tienen los sistemas de pensiones en las transiciones al retiro de los adultos en edades medias y avanzadas en México. Para ello se utilizan datos microeconómicos provenientes de la Encuesta Nacional de Salud y Envejecimiento. Mediante análisis econométrico se identifican los factores sociodemográficos, económicos, laborales e institucionales que están asociados al acceso a una pensión de jubilación, o bien, a la dependencia de otras fuentes de ingresos. Se encontró que, en México, las transiciones al retiro del mercado de trabajo en las etapas avanzadas del ciclo de vida son limitadas debido a las características eminentemente contributivas de los esquemas de pensiones, los cuales favorecen a la población con trayectorias laborales formales y más estables asociadas a: características de género, oportunidades educativas y posibilidades de inserción en el mercado laboral. PMID:27524936

  7. Rupture bilatérale des tendons rotuliens chez un sujet jeune sans notion de maladies systémiques ou de traitement par les corticostéroïdes: à propos d'un cas et revue de la literature

    PubMed Central

    Chagou, Aniss; Rhanim, Abdelkarim; Berrady, Mohammed Ali; Lamrani, Moulay Omar; Oudghiri, Mohammed; Berrada, Mohammed Saleh; El Yaacoubi, Moradh

    2014-01-01

    Les lésions du tendon rotulien sont moins communes que celles du tendon quadricipital. Les lésions bilatérales sont encore plus rares et sont souvent associées à une notion de tendinopathie, d'injection de corticoïdes ou de maladies systémiques tels que le lupus érythémateux, l'ostéomalacie ou l'insuffisance rénale chronique. Nous rapportons le cas d'un patient de 26 ans victime d'une rupture bilatérale du tendon rotulien suite à une réception de saut. Le patient n'avait pas d'antécédents de tendinopathie ni de maladies systémiques. Le diagnostic a été suspecté devant une position anormalement haute des deux rotules avec une impossibilité d'extension active des deux jambes. L’échographie a confirmé le diagnostic. Le patient a été traité par la technique de laçage selon Judet protégée par un cadrage. La rupture bilatérale du tendon rotulien est rare. La plupart des patients rapportent une notion de maladie systémique ou un antécédents de chirurgie du genou. Nous rapportons le cas d'une lésion rare dans la littérature, une rupture bilatérale des tendons rotuliens sans notions de maladies auto-immunes ni de traitement avec des corticostéroïdes. Les lésions bilatérales présentent certaines particularités diagnostiques et thérapeutiques. En effet l'objectivation d'une rotule haute peut être rendu difficile par un aspect controlatéral semblable. Concernant le volet thérapeutique, deux difficultés sont à noter la première réside dans l'absence de référence comparative pour la hauteur patellaire. La deuxième difficulté est l'obligation de différer l'appui à 45 jours. Ce qui est contraignant pour le patient. La technique de laçage décrite par judet couplée à un cadrage provisoire protégeant la suture nous a donné des résultats satisfaisants. PMID:25667711

  8. The Bi-Digital O-Ring Test used in the successful diagnosis & treatment (with antibiotic, anti-viral agents & oriental herbal medicine) of a patient suffering from pain & weakness of an upper extremity & Barré-Liéou syndrome appearing after whiplash injury. A case report.

    PubMed

    Ayuzawa, S; Yano, H; Enomoto, T; Kobayashi, H; Nose, T

    1997-01-01

    A patient with a whiplash injury suffering from prolonged symptoms, including pain and weakness of the right upper extremity and the symptoms of Barré-Liéou syndrome, was diagnosed and treated with the Bi-Digital O-Ring Test as a supplement to standard medical examinations. Radiological findings showed spondylotic canal stenosis with osteophytes and disc protrusions. The Bi-Digital O-Ring Test indicated a strong abnormal response around the right side of his neck and right shoulder, including the area of the vertebral artery and at acupuncture point GB 21, where positive resonant responses to Cytomegalovirus and Streptococcus faecalis were detected. Antibiotic and anti-viral agents, as well as Ku-Oketsu-Zai, a type of Oriental herbal medicine for overcoming blood stagnation or stasis, were administered according to the drug compatibility test using the Bi-Digital O-ring Test and the following clinical results were obtained. Infection at the site of the vertebral artery and the peri-arterial sympathetic nerve plexus was considered as a cause of the prolongation of the symptoms including Barré-Liéou syndrome, in this case. In addition we especially noted, in this clinical case, that the patient's impaired grasping force dramatically improved from 8 kg to 52 kg in a very short periods of time when the patient held suitable medicine selected with the Bi-Digital O-Ring Test drug compatibility test. We assume that the drug action was transferred electromagnetically, by which the pathological electromagnetic oscillations caused by trauma and following infections were scavenged. This effect might lead to an improvement in the coordination of the neuromuscular system. PMID:9494625

  9. The Forum for Defence of the Brazilian Unified Health System (Sistema Único de Saúde) and its role in building community participation in the fight against the privatization of health.

    PubMed

    de Lara, Lutiane; Guareschi, Neuza Maria de Fátima

    2016-03-01

    Based on a Foucauldian framework, this article discusses the involvement of the Forum for Defence of the Sistema Único de Saúde in the fight against health care privatization. Community participation is a locus of experience that produces subjects implicated in the production of public health care. The locus of experience in this instance derives from the rejection of private elements that historically have been part of Brazilian public policies. It is an experience that produces workers and service users as agents able to defend the public system and endowed with instituting power. PMID:26987838

  10. A critical view of the 'social reinsertion' concept and its implications for the practice of psychologists in the area of mental health in the Brazilian Unified Health System (Sistema Único de Saúde).

    PubMed

    Frazatto, Carina F; Sawaia, Bader B

    2016-03-01

    Improving psychological practice in mental health services in the Brazilian Unified Health System (Sistema Único de Saúde) requires a critical analysis of core concepts of the psychiatric reform, such as 'social reinsertion'. This analysis, oriented by the dialectics of exclusion/inclusion, showed that this concept is impregnated with the adaptation paradigm and asylum view which prevents its effective implantation. The results suggest it is necessary to include social aspects in the discussion of mental health, articulating it with networks of social work and recuperating the revolutionary aspects of the psychiatric reform, thus demarcating the political nature of professional practices. PMID:26987835

  11. Aspergilosis cervical con diseminación al sistema nervioso central. Presentación de un caso y revisión de bibliografía

    PubMed Central

    Vergara, Guillermo Enrique; Roura, Natalia; del Castillo, Marcelo; Mora, Andrea; Alcorta, Santiago Condomi; Mormandi, Rubén; Cervio, Andrés; Salvat, Jorge

    2015-01-01

    Introducción: la Aspergilosis Invasiva (AI) del Sistema Nervioso Central (SNC) es infrecuente y ocurre generalmente en pacientes inmunocomprometidos. Puede presentarse con cuadros de meningitis, aneurismas micóticos, infartos o abscesos. Es una infección con pronóstico reservado y puede afectar el SNC de forma primaria o secundaria a partir de un foco que se disemina por vía hematógena. Presentamos el caso de un paciente con AI con invasión primaria a nivel óseo y diseminación posterior al cerebro. Caso clínico: Paciente masculino de 25 años con diagnóstico de leucemia linfática aguda en tratamiento quimioterápico que presentó neumonitis por metotrexate por lo que inicia tratamiento con corticoides. Posteriormente agregó cervicalgia y con el diagnóstico de osteomielitis cervical se realiza punción bajo tomografía computada (TC) sin aislarse gérmenes. Se colocó Halo Vest e inició tratamiento antibiótico empírico. Posteriormente presentó afasia de expresión secundaria a lesión frontal izquierda. Se realizó evacuación de absceso cerebral aislando A. fumigatus. El tratamiento antibiótico específico posterior permitió una buena respuesta clínica y radiológica. Conclusión: La presencia de lesiones en el SNC de pacientes inmunocomprometidos debe incluir a las micosis como diagnóstico diferencial. La evacuación quirúrgica permite llegar rápidamente al diagnóstico mejorando la respuesta posterior al tratamiento antibiótico. Para evaluar la respuesta terapéutica y posibles recaídas se debe realizar un seguimiento periódico clínico radiológico. Palabras clave: Aspergilosis cerebral; Aspergilosis cervical; Aspergilosis invasiva; Voriconazol. PMID:26600985

  12. Analisis del contenido curricular de los Documentos Normativos del Programa de Ciencias en el area de biologia para la escuela superior del sistema de educacion publica de Puerto Rico: 1993-2012

    NASA Astrophysics Data System (ADS)

    Davila Montanez, Melissa

    Esta investigacion de naturaleza cualitativa se ocupo de realizar un analisis de contenido documental de los Documentos Normativos del Programa de Ciencias en el area de biologia de la escuela superior del sistema de educacion publica de Puerto Rico del periodo 1993-2012. Los documentos analizados fueron: Guia Curricular, 1995; Marco Curricular, 2003; Estandares de Excelencia, 1996, 2000 y Estandares de Contenido y Expectativas de Grado, 2007. Se indago si hubo cambios en significados en los Componentes Estructurales: Naturaleza de la ciencia, Paradigmas para la ensenanza de la ciencia, Funcion del curriculo formal, Mision de la ensenanza de la ciencia; Contenidos, destrezas y competencias, Estrategias de ensenanza y Evaluacion/Assessment del aprendizaje. El analisis sugiere que no hubo cambios sustanciales en los significados de los Componentes Estructurales. Los documentos estudiados muestran mayormente caracteristicas similares, aunque los documentos mas recientes eran mas descriptivos, explicativos y especificos.

  13. DIAMOND ALKALI OU2 - PASSAIC RIVER STUDY AREA

    EPA Science Inventory

    EPA, the U.S. Army Corps of Engineers (Corps), New Jersey Department of Transportation (NJDOT) ), National Oceanic and Atmospheric Administration (NOAA), U.S. Fish and Wildlife Service (USFWS) and New Jersey Department of Environmental Protection (NJDEP) are conducting a joint st...

  14. Analyse de l'effet des courants induits sur l'impédance d'un système électromagnétique alimenté en tension BF ou HF. Utilisation de la méthode des circuits couplés

    NASA Astrophysics Data System (ADS)

    Maouche, B.; Feliachi, M.

    1997-10-01

    In this paper, a study of the interaction between the inductor and the load of an axisymmetrical induction device is proposed. This interaction concerns the effect of the eddy current on both the excitation current and on the system impedance. A half analytical model, based on a numerical discretization of the electromagnetic solution domain, is used. In each cell of the numerical discretization, an analytical calculation using the Moment Method (MM) is considered. In the case of strong skin effect (High Frequency: HF), the formulation makes use of the Impedance Boundary Condition (IBC); in the contrary case (Low Frequency: LF), the interior domain is discretized. Dans cet article nous proposons l'étude de l'influence d'une charge (induit) conductrice sur la répartition du courant inducteur ainsi que sur l'impédance du système. L'inducteur est à géométrie axisymétrique de forme solénoïdale ou pancake destiné au chauffage par induction. Une méthode semi-analytique, basée sur une discrétisation du domaine en mailles élémentaires auxquelles s'applique une formulation intégrale (Méthode des Circuits Couplés : MCC) des grandeurs électromagnétiques, est utilisée. Dans le cas où l'effet de peau est important (Haute Fréquence:HF), la formulation associe la Condition d'Impédance de Surface; dans le cas contraire (Basse Fréquence : BF), un maillage du domaine interne est pratiqué.

  15. "Canteiro Escola"--Uma Resposta da Industria da Construcao no Contexto Produtivo Atual (The "Building Site" School--A Construction Industry Answer in the Actual Productive Context).

    ERIC Educational Resources Information Center

    Barone, Rosa Elisa; Letelier, Maria Eugenia

    1995-01-01

    Presents examples of the discourse of construction industry personnel involved in workplace basic education in Brazil. Reports on the perspective of the workers/students and on the experiences and the vision of those who implement the educational programs. Identifies the limits of the schooling process and the difficulties inherent in the present…

  16. Health and safety plan for operations performed for the Environmental Restoration Program. Task, OU 1-03 and OU 4-10 Track 2 investigations

    SciTech Connect

    Trippet, W.A. II; Reneau, M.; Morton, S.L.

    1992-04-01

    This document constitutes the generic health and safety plan for the Environmental Restoration Program (ERP). It addresses the health and safety requirements of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA); Occupational Safety and Health Administration (OSHA) 29 CFR 1910.120 standard; and EG&G Idaho, Inc. This plan is a guide to individuals who must complete a health and safety plan for a task performed for the EPR. It contains a task specific addendum that, when completed, specifically addresses task specific health and safety issues. This health and safety plan reduces the time it takes to write a task specific health and safety plan by providing discussions of requirements, guidance on where specific information is located, and specific topics in the Addendum that must be discussed at a task level. This format encourages a complete task specific health and safety plan and a standard for all health and safety plans written for ERP.

  17. [Consultations in oncological supportive care mono-, multi-, ou interdisciplinary: What should we favour?].

    PubMed

    Garnier, Stéphanie Ranque; Pelletti, Caroline; Quenard, Christelle; Vallet, Fabienne; Lemoine, Patrick; Guastella, Virginie; Rhondali, Wadih

    2015-09-01

    According to the point 7.6 and 7.7 of the Cancer Plan 2014, all cancer patients should have access to supportive care. Indeed, the supportive care consultation in oncology is an important tool for the symptom management of cancer patients at all times of treatment. This consultation can be mono-disciplinary or multi-disciplinary (with different professions: physician, nurse, psychologist, social service assistant…) with or without integration (multidisciplinary or interdisciplinary). There are few studies focusing on the types of consultations (mono- or multidisciplinary) to promote based on their expected outcomes. After describing the different types of consultations (initial, follow-up, unscheduled, discharge) and having highlighted the main issues of these consultations, we will present the possible configurations. Our discussion will concern then the advantages and disadvantages of monodisciplinarity and different types of multidisciplinary highlighting the possible improvements. At the end of this work, after a brief synthesis of the different outcomes associated with each type of consultation, we would like to discuss the type of consultation to choose according to the outcomes. PMID:26031300

  18. Using statistics to determine data adequacy for environmental policy decisions (shootout at the OU-3 corral)

    SciTech Connect

    Kelly, E.; Campbell, K.; Michael, D.; Black, P.

    1998-12-31

    The discipline of statistics often plays an important role in environmental policy decision-making, when decisions are, if not completely based on, at least informed by environmental data. Statistics provides guidance for the type, quantity, and quality of data required to support the policy decisions, as well as the techniques for assessing the data once it is collected. Environmental policy decisions occur at many levels, national, regional, state, and local. This paper describes the use of statistics to support policy decisions at the local level. Even at the local level, decisions can involve millions and, in some cases, billions of dollars. Additionally, local policy decisions can have ramifications for policy decisions at the state, regional and national levels. The two major regulations that drive environmental restoration are the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) (also known as Superfund), and the Resource Conservation and Recovery Act (RCRA). In many areas state water quality standards and other requirements are also important drivers. The United States Environmental Protection Agency (USEPA) has placed the statistician right in the center of the environmental restoration work. It has done this by issuing guidance that recommends that planning for environmental data collection follows the Data Quality Objectives (DQO) Process (USEPA 1994), and evaluation of the data follows the Data Quality Assessment (DQA) Process (USEPA 1996). These processes are based on formal statistical techniques such as hypothesis testing and estimation, and explicitly link data collection to risk management decisions through specification of acceptable levels for statistical decision errors.

  19. Le futur linguistique: temps lineaire ou temps ramifie (The Linguistic Future: Linear or Branching Time)?

    ERIC Educational Resources Information Center

    Martin, Robert

    1981-01-01

    Discusses the problems posed by a semantic analysis of the future tense in French, addressing particularly its double use as a tense and as a mood. The distinction between linear and branching time, or, certainty and possibility, central to this discussion, leads to a comparative analysis of future and conditional. (MES)

  20. Sources semiconductrices de photons uniques ou de photons jumeaux pour l'information quantique

    NASA Astrophysics Data System (ADS)

    Berger, Vincent; Gérard, Jean-Michel

    2003-07-01

    A large number of scientific proposals in recent years are based on transport and manipulation of information using single quantum objects. Although very impressive theoretical perspectives have been envisaged, experimental demonstrations are still limited due to technological difficulties with present state-of-the-art devices. This paper presents various approaches aiming at efficient single or twin photons semiconductor sources. The emergence of these devices will be an important technological breakthrough in the field of quantum information. To cite this article: V. Berger, J.-M. Gérard, C. R. Physique 4 (2003).

  1. L'exobiologie ou l'origine chimique de la vie

    NASA Astrophysics Data System (ADS)

    Brack, A.; Halbwachs, J.-L.

    2006-03-01

    By definition, exobiology includes the study of the origin, evolution and distribution of life in the universe, terrestrial life serving as a reference in our search for extraterrestrial life. On Earth, life emerged in water about 4 billion years ago with organised molecular systems capable of self-reproduction and also capable of evolution. It is generally agreed that its main ingredients were liquid water and organic molecules, i.e. skeletons of carbon atoms flanked by hydrogen, oxygen, nitrogen, sulfur and phosphorus atoms. Organic matter might have been formed in the primitive Earth's atmosphere or near hydrothermal vents. A large fraction of prebiotic organic molecules might have been brought by extraterrestrial meteoritic and cometary dust grains decelerated by the atmosphere. The possibility that life might have evolved on early Mars, when water existed on the surface, marks it as a prime candidate in the search for microbial life beyond the Earth. Europa has an icy carapace and probably a subsurface region of water which might harbor a basic life form. The atmosphere and surface components of Titan are also of interest to exobiology for the insight into a hydrocarbon-rich, chemically evolving world. Furthermore, the detection of interstellar organic molecules and the discovery of extrasolar planets broaden the field of astrobiology to the whole Universe.

  2. Mercury speciation modeling using site specific chemical and redox data from the TNXOD OU

    SciTech Connect

    Kaplan, D.I.

    2000-03-22

    The objective of this study was to evaluate mercury speciation under reducing conditions expected in sediments at the TNX Outfall Delta Operable Unit. These changes in speciation would then be used to infer whether mercury toxicity and mobility would be expected to be significantly altered under reducing conditions. The results from this work suggest that mercury would likely become more strongly retained by the solid phase under reducing conditions than under oxidizing conditions at the TNX Outfall Delta Site. Considering that experimental results indicate that mercury is extremely tightly bound to the solid phase under oxidizing conditions, little mercury mobility would therefore be expected under reducing conditions.

  3. High explosive spot test analyses of samples from Operable Unit (OU) 1111

    SciTech Connect

    McRae, D.; Haywood, W.; Powell, J.; Harris, B.

    1995-01-01

    A preliminary evaluation has been completed of environmental contaminants at selected sites within the Group DX-10 (formally Group M-7) area. Soil samples taken from specific locations at this detonator facility were analyzed for harmful metals and screened for explosives. A sanitary outflow, a burn pit, a pentaerythritol tetranitrate (PETN) production outflow field, an active firing chamber, an inactive firing chamber, and a leach field were sampled. Energy dispersive x-ray fluorescence (EDXRF) was used to obtain semi-quantitative concentrations of metals in the soil. Two field spot-test kits for explosives were used to assess the presence of energetic materials in the soil and in items found at the areas tested. PETN is the major explosive in detonators manufactured and destroyed at Los Alamos. No measurable amounts of PETN or other explosives were detected in the soil, but items taken from the burn area and a high-energy explosive (HE)/chemical sump were contaminated. The concentrations of lead, mercury, and uranium are given.

  4. T-REX OU4 HIRES: the high resolution spectrograph for the E-ELT

    NASA Astrophysics Data System (ADS)

    Oliva, E.; Baffa, C.; Busoni, L.; Carbonaro, L.; Cresci, G.; Del Vecchio, C.; Esposito, S.; Ferruzzi, D.; Giani, E.; Iuzzolino, M.; Massi, F.; Miglietta, L.; Pinna, E.; Riccardi, A.; Sanna, N.; Sozzi, M.; Tozzi, A.; Curti, M.; Faggi, S.; Marconi, A.; Bragaglia, A.; Montegriffo, P.; Origlia, L.; Bruno, P.; Munari, M.; Scuderi, S.; Leone, F.; Genoni, M.; Landoni, M.; Poretti, E.; Riva, M.; Zerbi, F.; Carleo, I.; Gratton, R.; Antoniucci, S.; Li Causi, G.; Nisini, B.; Vitali, F.; Cirami, R.; Coretti, I.; Cristiani, S.; Cupani, G.; D'Odorico, V.; Di Marcantonio, P.; Molaro, P.; Viel, M.

    The goal of this unit was to consolidate the project for the construction of the high resolution spectrometer of the E-ELT (HIRES). The task included the development of scientific cases and tools to predict the instrumental performances. From the technical point of view it included several R&D activities in collaboration with highly specialized Italian companies; it culminated with the detailed design of a highly modular instrument based on well established technologies. From the management point of view it lead to the consolidation of a large international consortium that spans over 12 countries and includes most of the European and ESO-related institutes interested in high resolution spectroscopy. This consortium is led by INAF; its formal creation is awaiting the official call by ESO for the phase-A study for the HIRES instrument of the E-ELT.

  5. Utiliser la Dimension Europeenne Pour Faire Sortir l'Ecole de ses Murs ou "Extra Muros."

    ERIC Educational Resources Information Center

    Champollion, Pierre

    2002-01-01

    Five European institutions devoted to principal training developed the Comenius project "Extra Muros" between 1996-99. Its objectives were understanding the importance of educative action outside the school in order to provide equal opportunity to all students, as well as to promote the awareness of Europe among schools. The project facilitates…

  6. Flow Model Development for the Idaho National Laboratory OU 10-08 Sitewide Groundwater Model

    SciTech Connect

    Hai Huang; Swen Magnuson; Thomas Wood

    2005-09-01

    A two-dimensional (2D), steady-state groundwater flow model was developed for the Idaho National Laboratory (INL) sitewide groundwater model. A total of 224 wells inside the model domain were used to calibrate the 2D flow model. Three different calibration techniques, zonation approach, pilot point approach and coupled zonation/pilot point approach, were explored and applied during the model development. The pilot point approach allows modelers to model aquifer heterogeneities at various scales, and extract the maximum amount of data from available monitoring data, permitting the best possible representation of flow and transport at the INL.

  7. Professionnalisation ou Deprofessionnalisation: Une Base Conceptuelle pour L'evaluation de La Competence en Psychologie.

    ERIC Educational Resources Information Center

    Perron, Jacques; And Others

    1980-01-01

    Elements of professionalization--systematic body of theory, social recognition, monopoly, and degree of organization--are presented and applied to the development of professional psychology in Quebec. The concept of deprofessionalization is introduced as an alternative basis for evaluating competence in professional psychology. (Author)

  8. Qubit-Photon Entanglement and Hong-Ou-Mandel Interference with Propagating Microwaves

    NASA Astrophysics Data System (ADS)

    Eichler, Christopher; Lang, Christian; Fink, Johannes; Govenius, Joonas; Steffen, Lars; Filipp, Stefan; Wallraff, Andreas; Woolley, Matthew; Blais, Alexandre

    2013-03-01

    Itinerant microwave photons offer an attractive carrier of quantum information in superconducting circuits. However, until recently it remained challenging to measure photon statistics and coherence properties of microwave fields beyond the Gaussian level - mainly due to the absence of efficient detectors in this frequency range. Here, we present the on-demand generation and efficient characterization of microwave radiation and its entanglement with stationary qubits. Based on novel tomography techniques and low noise parametric amplification we are able to resolve all relevant quantum correlations between the propagating field and the superconducting qubit to demonstrate entanglement with high fidelity. We have also created entangled microwave fields traveling in two spatially separated modes. Making use of the two-photon interference at a microwave beamsplitter we are able to prepare propagating NOON-type states, which we fully characterize by measuring the joint photon statistics of the two modes. The possibility to synthesize, guide and detect entanglement correlations between itinerant microwave photons and stationary qubits put microwave based quantum network experiments within reach.

  9. Integrated assessment of groundwater resources in the Ouémé basin, Benin, West Africa

    NASA Astrophysics Data System (ADS)

    Barthel, R.; Sonneveld, B. G. J. S.; Götzinger, J.; Keyzer, M. A.; Pande, S.; Printz, A.; Gaiser, T.

    An integrated assessment of groundwater resources in Benin, West Africa was performed within the framework of the EC-funded research project RIVERTWIN ( www.rivertwin.org). The assessment included a spatial analysis of groundwater relevant parameters taken from more than 4000 wells stored in a countrywide water database (BDI - Banque des Données Intégrée) and an estimation of the spatial and temporal distribution of groundwater recharge using a modified version of the hydrological model HBV. Additionally, a socio-economic assessment of the impacts of groundwater availability and accessibility on national health issues as well as an assessment of groundwater development costs was carried out. The analysis revealed particularly unfavourable conditions for groundwater use in the northern part of the country where groundwater recharge during the wet season does not lead to the formation of persistent groundwater storage in its shallow, unconfined aquifers. Poor storage capacity and hydraulic properties of the deeper fractured aquifers additionally limit the capacity of individual wells to capture groundwater recharge. Including climate change scenarios forecasting less precipitation (generated from global climate models (GCM) based on IPCC scenarios) indicates that the situation in water scarce regions will worsen, as recharge volumes lessen and occur over a shorter time period. Drilling more wells may be a limited option to capture larger portions of the recharge, since the capture zone and therefore the regional influence of existing wells is rather small. In the south, deeper confined aquifers guarantee better and more reliable yields, yet the lack of long-term monitoring and groundwater age data does not allow an appraisal of the limits of the sustainable use of these aquifers. Finally, it has been shown that access to suitable aquifers and diarrhea prevalence are spatially correlated. Access to groundwater is thereby not only a function of aquifer suitability and groundwater availability but a function of well development (mainly drilling) costs as well. The present study can be seen as a first attempt of an integrated evaluation of the groundwater resources and the development options based on the BDI data set. However, it can clearly be seen that the amount, nature and reliability of the data currently available is not sufficient to come to a clear, spatially explicit description of groundwater resources in the country. Improved monitoring and the use of advanced data collection methods (isotopic analysis, remote sensing, fully coupled models of the hydrological cycle) are required to improve the understanding Benin’s groundwater resources.

  10. Des Ateliers de Philosophie a l'Ecole Elementaire: Idealisme ou Pragmatisme? Un Exemple en France.

    ERIC Educational Resources Information Center

    Bailleul, Marc

    2003-01-01

    After a brief description of a sequence of philosophical workshops, this article analyzes, first, the request of the teachers who enroll for the training courses offered, and second, the training course itself. This analysis is conducted through a model crossing the two axes: pragmatism/idealism and individualism/social coherence. (SM)

  11. Jeux droles ou droles de jeux. (Funny Games or Strange Games.)

    ERIC Educational Resources Information Center

    Care, Jean-Marc

    1983-01-01

    Role playing differs from the more static teaching technique of simulation in its incorporation of originality and theatricality. From preparation to presentation, it is important to retain the element of play, avoid techniques of or tendencies toward psychodrama, and hold the pedagogical or evaluative purposes in mind. (MSE)

  12. The Mexican Sistema de Alerta Sismica (SAS) Experience

    NASA Astrophysics Data System (ADS)

    Espinosa-Aranda, J.; Rodriguez, F.

    2003-12-01

    The Mexico City's SAS is an Early Warning System developed in accordance with recommendations of foreign and national seismology experts, after the disaster generated in 1985 by the M8.1 Michoacan earthquake. The SAS aim is to help mitigate future seismic disasters in Mexico City (MC), mainly if the big forecast "Guerrero Earthquake" hits. In 1991 the SAS started its service in an experimental basis for evaluating its performance both with a group of basic education students in public schools, and with the emergency stop function for the Mexico City Metropolitan Subway System (METRO of MC); after this The Federal District Government (FDG) opened the SAS as a public service in August, 1993, shortly after the SAS warned, with more than 60 seconds of anticipation, the incoming effect of May 13, 1993, M5.8, and M6 double earthquake originated more than 300 Km from MC between Guerrero and Oaxaca, on the coast. That year, an initial technical flaw generated one false alert signal; the cause was readily corrected. The SAS has 12 seismic sensor stations covering a stripe close to 400 X 100 Km on the Guerrero's coast, between Papanoa and Punta Maldonado, that send information through a dedicated radio relay system to the SAS Central Control in MC., using the valuable support of some TELMEX field installations. Until August, 2003, the SAS sensor system has detected more than 1550 earthquakes in the 2.55 magnitude events, which are the ones felt in MC. The SAS has generated 57 warning signals with an average of 60 sec in advance to earthquake effects: 46 of restricted use for M<6, and 11 of public use for M>6 events. Public warnings have the automatic broadcast support of many commercial radio AM/FM and TV stations in Mexico City and Toluca valleys. The FDG controls the SAS signal service that includes the more frequent events (from M>5 up), asking the user to develop procedures and practice useful actions to mitigate seismic disasters. Each validated SAS seismic warning automatically generates and sends the event information by fax and e-mail to the DFG and Civil Protection Authorities, users and news media; it also sends information about the SAS operating conditions to service technicians, via radio, and phone.

  13. El enfoque de sistemas en programas de seguridad cuarentenaria

    Technology Transfer Automated Retrieval System (TEKTRAN)

    In a globalized world, the application of phytosanitary measures for quarantine by the producing countries is becoming more important as it facilitates access to key export markets for fruits and vegetables. Some of the problems currently encountered with quarantine treatments include, among others...

  14. Diversidad de Sistemas Planetarios en Discos de Baja Masa

    NASA Astrophysics Data System (ADS)

    Ronco, M. P.; de Elía, G. C.

    The accretion process that allows the formation of terrestrial planets is strongly dependent on the mass distribution in the system and the presence of gas giant planets. Several studies suggest that planetary systems formed only by terrestrial planets are the most common in the Universe. In this work we study the diversity of planetary systems that could form around solar-type stars in low mass disks in absence of gas giants planets and search wich ones are targets of particular interest. FULL TEXT IN SPANISH

  15. Momentos centrados en sistemas estelares a simetria axial.

    NASA Astrophysics Data System (ADS)

    Sanz Subirana, J.; Juan Zornoza, J. M.; Català Poch, M. A.

    Centered moments in the galactic plane have been analytically determined up to the fourth order for a non-stationary stellar system model with a distribution of peculiar velocities of the stars symmetric under point-axial transformations and equatorial plane reflexions. The obtained results explain satisfactorily the peculiar velocities distribution of the considered stellar samples in the solar neighborhood.

  16. Formation des adultes ou transformation des structures de l'entreprise (Manpower Development or the Transformation of Industrial Structures).

    ERIC Educational Resources Information Center

    Caspar, Pierre

    This action research study describes how the Centre Universitaire de Cooperation Economique et Sociale (CUCES) set up an initial instructor training program for senior engineers in a large French cement firm and eventually progressed toward overall organizational change. Beginning with research methodology and some practical problems encountered…

  17. Ordinateurs: Efficaces ou pas? (La Perspective d'une Enseignante) (Computers: Effective or Not? [One Teacher's Perspective]).

    ERIC Educational Resources Information Center

    Pellerin, Micheline

    1999-01-01

    Examined the effectiveness of computer assisted language learning among two groups of students enrolled in an intermediate French course. One group of students spent more time each week in a computer laboratory than did a second group of students. Overall, students who spent more time in the laboratory had higher class averages at the end of the…

  18. Structure de l'univers - quand l'observation guide la théorie... ou pas

    NASA Astrophysics Data System (ADS)

    Nazé, Yaël

    The scientific method is often presented, e.g. to children, as a linear process, starting by a question and ending by the elaboration of a theory, with a few experiments in-between. The reality of the building of science is much more complex, with back-and-forth motions between theories and observations, with some intervention of technology and randomness. This complex process is not always correctly understood and assimilated, even amongst scientists. The hero cult, mixed with some revisionism, still exists despite in-depth historical studies. In this context, it may be useful to comparatively examine the reaction to crucial observations, their interpretation and their impact on the contemporaneous theory development. Four examples are presented here, all linked to the question of the 'construction of the heavens' but at different epochs.

  19. La conception de l'expérience scolaire aujourd'hui: Virage ou Évolution

    NASA Astrophysics Data System (ADS)

    Bordėleau, Louis-Gabriel

    1987-09-01

    The changes characterizing the conception and educational practices in the school environment nowadays are mainly manifest on the following three levels: the learner and his learning, the planning and implementation of school programmes and thirdly, the conception and practice of evaluation. These changes are strongly stimulated by the complex interaction of social, economic and technological transformations which are reshaping our present pluralistic society. The speed with which these social changes have taken place have forced the school to face two major challenges: firstly, to involve itself resolutely in decreasing the distance between school and society and secondly to define its own function in a more precise manner so as to take over its prescribed role of educational leadership in society. On the conceptional level with regard to the learner and the learning process, the author discerns an important tendency leading to a more integral vision. The sterile juxtapositioning of process and content is now being overcome. On the level of planning and implementation of school programmes several tendencies become apparent: the programmes tend to become more prescriptive and the school increases its stock of core subjects. These two tendencies try to integrate themselves in a policy of respect for individual differences. And finally it is recognized that the phase of implementation is of as critical importance if not more so than that of planning. The practices concerning evaluation seem at present to be influenced by recent social pressures demanding that the school provide education of greater quality which responds more adequately to the new challenges effected by a society in a state of tremendous evolution.

  20. Simulation d'un systeme de stockage saisonnier de glace pour la climatisation d'un batiment commercial ou institutionnel

    NASA Astrophysics Data System (ADS)

    Giraldo, Raul Alberto

    The principal goal of this study was to evaluate, using numerical simulation, the feasibility of an air conditioning system, supported by a seasonal ice storage system, installed in a commercial or institutional building. In this regard, the effects of changing several elements around the design of two possible scenarios were modeled in TRNSYS using Matlab® as a programming tool. In the first scenario, the air demanded inside the building passes directly through the ice storage system. In a second scenario, a closed loop pipe full of glycol transports the heat between the ice reservoir and an air cooling coil. First of all, the literature review shows some studies and earlier relevant applications, as well as different solving methods for moving boundary problems in a biphasic medium (waterice). Next, the heat load profile for a typical institutional building in Montreal is determined as a reference point using EE4 and three different methods of solving the boundary motion problem are compared for both, ice training and ice melting. Subsequently, the design parameters are presented for each scenario. This is followed by a description of the programming codes in Matlab® and the components that have been implemented in TRNSYS. Finally, the results involving the heat exchanged and the waterice boundary movements, among others, are collected for one year and for three years. The simulations of both scenarios have also included the experimental variation of some parameters such as the construction area for the ice reservoir, the duration of the ice melting period and other related physical variables. A final analysis of results was followed by an economic study, which considered the changes in initial investment and the potential energy savings for each scenario, compared with a traditional air conditioning unit. This showed that, although research is still needed on many improvements in the design of scenarios and whether its application is limited by several macroeconomic factors, a seasonal ice storage system is an appealing option in energy efficiency terms and it could potentially be, technically and ecologically, a good way to obtain energy savings.

  1. Canada's Kids: Thriving? Or Just Surviving? = Les enfants du Canada: Se developpent-ils bien ou vivotent-ils simplement?

    ERIC Educational Resources Information Center

    McCloskey, Donna, Ed.

    1997-01-01

    This quarterly journal issue (in English and French versions) includes the following articles: (1) "Canada's Kids: Thriving? Or Just Surviving?" (McCloskey, Donna), an overview of the latest research on the well-being of Canada's children; (2) "The Fence at the Edge of the Cliff: Approaching Family Policy in Canada" (Mirabelli, Alan), which…

  2. Biopuces pour le traitement de cellules vivantes : micromanipulation des cellules par voie électrique ou microfluidique

    NASA Astrophysics Data System (ADS)

    Le Pioufle, Bruno; Frénéa, Marie; Tixier, Agnès

    2004-06-01

    After a brief overview of the state of the art in the domain of cell biochips, and more particularly, the usual methods for cell placement and characterization on a chip, our research on highly parallelized cell placement on a chip is presented. Single cell arraying methods, using dielectrophoresis effects, or microfluidic effects produced by bulk micromachined sub-micrometric capillaries are compared. Target applications of such cell biochips cover the domain of gene transfer on a large population of cells, parallelized cell sorting, or drug high-throughput screening on living cells. To cite this article: B. Le Pioufle et al., C. R. Physique 5 (2004).

  3. Perles et saphirs ou comment parer votre expression francaise (Pearls and Sapphires or How to Embellish Your French Expression).

    ERIC Educational Resources Information Center

    Geno, Thomas H.

    1981-01-01

    Illustrates the pitfalls of French grammar and syntax by reproducing a student's composition, which mangles the language. Draws from similarly frustrating experiences and from a "New York Times" article entitled "The Fumble-rules of Grammar" to compile a list of "General Principles for the Improvement of Oral and Written French Expression." (MES)

  4. Colleges and Rural and Remote Communities: Challenge and Opportunity = Les colleges de collectivites rurales ou eloignees: Les defis et les perspectives d'avenir.

    ERIC Educational Resources Information Center

    Malcolmson, Lorna, Ed.

    2001-01-01

    This issue of College Canada looks at the challenges confronting Canada's rural community colleges. Topics addressed in the issue include information technology and community colleges, public policy for rural community colleges, and educational partnerships. Articles include: (1) "Gather 'Round, Let's Talk... Anchoring the Community College in…

  5. Assimilation of SMOS soil moisture into a distributed hydrological model and impacts on the water cycle variables over the Ouémé catchment in Benin

    NASA Astrophysics Data System (ADS)

    Leroux, Delphine J.; Pellarin, Thierry; Vischel, Théo; Cohard, Jean-Martial; Gascon, Tania; Gibon, François; Mialon, Arnaud; Galle, Sylvie; Peugeot, Christophe; Seguis, Luc

    2016-07-01

    Precipitation forcing is usually the main source of uncertainty in hydrology. It is of crucial importance to use accurate forcing in order to obtain a good distribution of the water throughout the basin. For real-time applications, satellite observations allow quasi-real-time precipitation monitoring like the products PERSIANN (Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks, TRMM (Tropical Rainfall Measuring Mission) or CMORPH (CPC (Climate Prediction Center) MORPHing). However, especially in West Africa, these precipitation satellite products are highly inaccurate and the water amount can vary by a factor of 2. A post-adjusted version of these products exists but is available with a 2 to 3 month delay, which is not suitable for real-time hydrologic applications. The purpose of this work is to show the possible synergy between quasi-real-time satellite precipitation and soil moisture by assimilating the latter into a hydrological model. Soil Moisture Ocean Salinity (SMOS) soil moisture is assimilated into the Distributed Hydrology Soil Vegetation Model (DHSVM) model. By adjusting the soil water content, water table depth and streamflow simulations are much improved compared to real-time precipitation without assimilation: soil moisture bias is decreased even at deeper soil layers, correlation of the water table depth is improved from 0.09-0.70 to 0.82-0.87, and the Nash coefficients of the streamflow go from negative to positive. Overall, the statistics tend to get closer to those from the reanalyzed precipitation. Soil moisture assimilation represents a fair alternative to reanalyzed rainfall products, which can take several months before being available, which could lead to a better management of available water resources and extreme events.

  6. What Feynman Could Not yet Use: The Generalised Hong-Ou-Mandel Experiment to Improve the QED Explanation of the Pauli Exclusion Principle

    ERIC Educational Resources Information Center

    Malgieri, Massimiliano; Tenni, Antonio; Onorato, Pasquale; De Ambrosis, Anna

    2016-01-01

    In this paper we present a reasoning line for introducing the Pauli exclusion principle in the context of an introductory course on quantum theory based on the sum over paths approach. We start from the argument originally introduced by Feynman in "QED: The Strange Theory of Light and Matter" and improve it by discussing with students…

  7. Heterologous expression of glutamyl-tRNA reductase gene in Rhodobacter sphaeroides O.U.001 to enhance 5-aminolevulinic acid production

    PubMed Central

    Kars, Gökhan; Alparslan, Ümmühan

    2014-01-01

    The pathways for synthesis of 5-aminolevulinic acid (5-ALA) use either succinyl-CoA and glycine (C-4 pathway), or glutamate (C-5 pathway). Although Rhodobacter sphaeroides synthesizes 5-ALA through the C-4 pathway, it also has the genes coding for the enzymes of the C-5 pathway, except for glutamyl-tRNA reductase. The glutamyl-tRNA reductase gene was cloned from Rhodospirillum rubrum and expressed in R. sphaeroides; thus, the C-5 pathway was enabled to function upon assembling all the required genes. Consequently, a new and unique bacterial strain producing more 5-ALA was developed. Biohydrogen was also produced in the same bioprocess within a biorefinery approach using sugar beet molasses as substrate. The amount of 5-ALA produced by the modified strain was 25.9 mg/g dry cell weight (DCW), whereas the wild-type strain produced 12.4 mg/g DCW. In addition, the amount of H2 generated by the modified and wild-type cells, respectively, was 0.92 L/L culture and 1.05 L/L culture. PMID:26740781

  8. Les notions floves en droit ou l'economie de l'imprecision (Fuzzy Notions in Law or the Economy of Imprecision).

    ERIC Educational Resources Information Center

    Mackaay, Ejan

    1979-01-01

    Proposes the theory that the "semantic fluidity" of legal terminology, far from being an obstacle to the carrying out of the law, is essential to the functioning of the executive, legislative, and judicial branches in a cost-effective manner. (AM)

  9. Aspects épidémiologique, clinique et anatomopathologique du mélanome CHU Yalgado Ouédraogo de Ouagadougou (Burkina Faso)

    PubMed Central

    Korsaga-Somé, Nina; Zongo, Nayi; Ouangré, Edgar; Tapsoba, Patrice; Ouédraogo, Muriel Sidnomam; Ilboudo, Léopold; Bassolet, Alban; Sanou, Maryam; Djimtibaye, Djounitana; Barro-Traoré, Fatou; Niamba, Pascal; Traoré, Adama

    2015-01-01

    Le mélanome est une tumeur maligne développée aux dépens des mélanocytes. Ses caractéristiques épidémiologiques restent peu étudiées dans les populations africaines. D'où le but de cette étude. Il s'est agit d'une étude rétrospective descriptive de janvier 2009 à décembre 2012 et prospective en 2013. Pour la partie rétrospective, nous avons inclus tous les patients atteints de mélanome confirmé par l'examen histopathologique et ayant un dossier clinique exploitable. Pour la partie prospective, nous avons inclus tous les cas de mélanomes recensés en 2013. Les variables étudiées étaient les caractéristiques sociodémographiques, anatomocliniques et thérapeutiques. Au total 19 patients étaient inclus, avec un âge médian de 53,42 ans et 10 patients de sexe féminin. La durée moyenne d’évolution de la maladie était de 3,7 ans. Les lésions étaient surtout ulcero-bourgeonnantes (13), hyperpigmentées (15), et siégeaient sur les plantes (14). Le type et acro-lentigineux était le plus fréquent (13). L'indice de Clarck a été mesuré dans 3 cas, l'indice de Breslow dans aucun cas. Les métastases étaient présentes chez 10 patients. Le traitement était surtout chirurgical. Les 11 patients inclus de manière retrospective étaient ont été perdus de vue. Un décès était noté parmi les 8 patients inclus de manière prospective. Le retard à la consultation semblait être le principal facteur de mauvais pronostic dans notre contexte. Une sensibilisation de la population et du personnel de santé sur les signes précoces de la maladie, permettrait probablement de réduire la morbidité. PMID:26113951

  10. Time series geophysical monitoring of permanganate injections and in situ chemical oxidation of PCE, OU1 area, Savage Superfund Site, Milford, NH, USA.

    PubMed

    Harte, Philip T; Smith, Thor E; Williams, John H; Degnan, James R

    2012-05-01

    In situ chemical oxidation (ISCO) treatment with sodium permanganate, an electrically conductive oxidant, provides a strong electrical signal for tracking of injectate transport using time series geophysical surveys including direct current (DC) resistivity and electromagnetic (EM) methods. Effective remediation is dependent upon placing the oxidant in close contact with the contaminated aquifer. Therefore, monitoring tools that provide enhanced tracking capability of the injectate offer considerable benefit to guide subsequent ISCO injections. Time-series geophysical surveys were performed at a superfund site in New Hampshire, USA over a one-year period to identify temporal changes in the bulk electrical conductivity of a tetrachloroethylene (PCE; also called tetrachloroethene) contaminated, glacially deposited aquifer due to the injection of sodium permanganate. The ISCO treatment involved a series of pulse injections of sodium permanganate from multiple injection wells within a contained area of the aquifer. After the initial injection, the permanganate was allowed to disperse under ambient groundwater velocities. Time series geophysical surveys identified the downward sinking and pooling of the sodium permanganate atop of the underlying till or bedrock surface caused by density-driven flow, and the limited horizontal spread of the sodium permanganate in the shallow parts of the aquifer during this injection period. When coupled with conventional monitoring, the surveys allowed for an assessment of ISCO treatment effectiveness in targeting the PCE plume and helped target areas for subsequent treatment. PMID:22459605

  11. La musique du mot et du concept, ou certains problemes de traduction poetique (The Music of Word and Concept, or Certain Problems in Poetic Translation)

    ERIC Educational Resources Information Center

    Maisonneuve, Roland

    1978-01-01

    The whole universe enters the poet's being to be eventually transformed by him/her into musical language. It is this music that the translator must reproduce. Excerpts from the poems of Patmore, Auden, Donne, Joyce and Sloate illustrate the discussion. Translation of mystical and religious poetry is given special attention. (Text is in French.)…

  12. Parlons musique et sons, ou notes a la portee...de tous (Let's Talk about Songs and Sounds, or Notes within Reach...Of Everyone).

    ERIC Educational Resources Information Center

    Zarate, Genevieve

    1984-01-01

    The language teacher is encouraged to begin use of song in the classroom by first learning himself to appreciate the musical qualities and the lyrics of the music he wants to teach and also the conditions under which music is produced and recorded. (MSE)

  13. Time series geophysical monitoring of permanganate injections and in situ chemical oxidation of PCE, OU1 area, Savage Superfund Site, Milford, NH, USA

    USGS Publications Warehouse

    Harte, Philip T.; Smith, Thor E.; Williams, John H.; Degnan, James R.

    2012-01-01

    In situ chemical oxidation (ISCO) treatment with sodium permanganate, an electrically conductive oxidant, provides a strong electrical signal for tracking of injectate transport using time series geophysical surveys including direct current (DC) resistivity and electromagnetic (EM) methods. Effective remediation is dependent upon placing the oxidant in close contact with the contaminated aquifer. Therefore, monitoring tools that provide enhanced tracking capability of the injectate offer considerable benefit to guide subsequent ISCO injections. Time-series geophysical surveys were performed at a superfund site in New Hampshire, USA over a one-year period to identify temporal changes in the bulk electrical conductivity of a tetrachloroethylene (PCE; also called tetrachloroethene) contaminated, glacially deposited aquifer due to the injection of sodium permanganate. The ISCO treatment involved a series of pulse injections of sodium permanganate from multiple injection wells within a contained area of the aquifer. After the initial injection, the permanganate was allowed to disperse under ambient groundwater velocities. Time series geophysical surveys identified the downward sinking and pooling of the sodium permanganate atop of the underlying till or bedrock surface caused by density-driven flow, and the limited horizontal spread of the sodium permanganate in the shallow parts of the aquifer during this injection period. When coupled with conventional monitoring, the surveys allowed for an assessment of ISCO treatment effectiveness in targeting the PCE plume and helped target areas for subsequent treatment.

  14. Pour Savoir ou vous en etes. Evaluez vous-meme vos connaissances (Knowing Where You Are. Evaluate Your Knowledge by Yourself).

    ERIC Educational Resources Information Center

    Aiello, Angelo; And Others

    1986-01-01

    A form is presented for language teacher self-evaluation concerning attitudes and knowledge about learning theories, general linguistics, sociolinguistics, pragmatics, discourse analysis, teaching methodology, the communicative approach, class activities, class management, instructional support, and evaluation. (MSE)

  15. Pseudo-HELLP syndrome par carence en folates et/ou en vitamine B12: à propos d'un cas

    PubMed Central

    Benali, Mechaal; Bouassida, Mahdi; Dhouib, Firas; Bouzeidi, Kaled

    2014-01-01

    Plusieurs pathologies médicales peuvent interférer avec la grossesse et mimer le tableau biologique de HELLP syndrome. L’évolution naturelle de ce syndrome est d'une particulière gravité pour la mère et le fœtus, il convient d’éliminer rapidement les autres diagnostics afin d’éviter une extraction fœtale prématurée injustifiée. Nous rapportons le cas d'une parturiente qui s'est présentée avec un tableau évocateur d'un HELLP syndrome, rapporté finalement à une carence en folates et en vitamine B12. PMID:25404961

  16. Trali ou œdème pulmonaire lésionnel aigu post-transfusionnel: à propos d'un cas avec revue de la literature

    PubMed Central

    Serghini, Issam; Nader, Youssef; Qamouss, Youssef; Zoubir, Mohamed; Lalaoui, Jaafar Salim; Boughalem, Mohamed

    2015-01-01

    L’œdème pulmonaire lésionnel aigue transfusionnel est une complication classique de la transfusion de produits sanguins labiles, responsable de 17% des décès liés à la transfusion. Il s'agit d'un syndrome de détresse respiratoire aiguë post-transfusionnel qui se présente comme un œdème pulmonaire aigu non cardiogénique survenant dans les six heures suivant la mise en oeuvre d'une transfusion sanguine. Le mot Trali utilisé pour désigner cet œdème est l'acronyme de l'anglais « transfusion-related acute lung injury »; l'incidence des TRALI déclarés en France reste faible à cause de leurs méconnaissances, faute d'une définition précise tant au plan clinique qu'au plan étiologique. La sensibilisation des médecins à l'identification des TRALI et à la déclaration, notamment en réanimation, doit être poursuivie. Des données récentes ont souligné sa relative fréquence et des études cliniques et biologiques plus attentives ont contribué à une meilleure compréhension de ses mécanismes dont deux sont bien défini: un conflit immunologique d'une part, une activation des polynucléaires neutrophiles par des facteurs lipidiquesd'autre part. Il est également admis que le Trali ne se déclenche que dans un contexte favorisant dont le substratum commun pourrait essentiellement être une leucostase préalable. Le traitement du Trali est celui des œdèmes pulmonaires lésionnels, oxygénothérapie et assistance respiratoire. Nous rapportons un cas de Trali survenu à la suite de la transfusion de 08 concentrés de globules rouges chez un jeune homme de 26 ans. PMID:26379812

  17. De la creativite a la creation ou des mythes a l'experience (From Creativity to Creation or From Myths to Experience).

    ERIC Educational Resources Information Center

    Comeau, Gilles

    1997-01-01

    Suggests that the concept of creativity has been used in an imprecise manner in education. Reviews theories of creativity in humanistic psychology, experimental psychology, and the cognitive psychological works of Piaget and Vygotsky. Argues that educators have not always distinguished between these differing views of creativity. (41 citations)…

  18. "Le Petit Prince" ou la bonne pedagogie: Une analyse semiotique des structures didactiques ("The Little Prince" or Good Teaching: A Semiotic Analysis of Didactic Structures).

    ERIC Educational Resources Information Center

    Kaminskas, Jurate

    1983-01-01

    Saint-Exupery's story, "The Little Prince," is analyzed from the point of view of the structures through which the author wishes to inspire and instruct the reader. The use of disguised didactic discourse and the manipulation of words toward this end are examined. (MSE)

  19. Une reevaluation de l'evaluation ou "Le coucou dans le nid" (A Critical Look at Evaluation Methods or "The Cuckoo in the Nest").

    ERIC Educational Resources Information Center

    Roe, Peter J.

    1981-01-01

    Discusses the fundamental principles of evaluation to show that the conventional approaches to testing have led to a situation where procedure requirements overshadow the objectives of the learning process. Advocates instruments that address realistic communication goals and states criteria based on the learner's need for continous, constructive…

  20. Mise en situation analogique, ou de la video a un niveau avance (Real Life Situations, or the Use of Visuals at the Advanced Level).

    ERIC Educational Resources Information Center

    Marino, Ingrid

    1982-01-01

    Cognitive theories normally applied to listening comprehension are applied to the use of visuals with mass media broadcasts for second language instruction: the visual image as advance organizer, as reinforcement of concrete information, and as an association with abstract information. A related study in Germany is cited and illustrated. (MSE)

  1. Performances comparées des machines à aimants et à réluctance variable. Maximisation du couple massique ou volumique

    NASA Astrophysics Data System (ADS)

    Matt, D.; Llibre, J. F.

    1995-10-01

    The subject of this article is to compare the performances of electrical machines using three different principles of functioning which are recently exploited. We consider possibilities to realise actuators with high torque and power per unit of mass for direct drive applications. The three different machines involved in the comparison are: (i) the classical synchronous structure with permanent magnets in the inductor, (ii) the vernier reluctance structure, (iii) the vernier reluctance structure with permanent magnets. To allow a good comparison, the architecture of those three motors has to be identical, particularly the shape of the main elements. L'objet de cet article est de comparer directement, pour la première fois à notre connaissance, les performances de machines électriques mettant en oeuvre trois principes de fonctionnement différents, très récemment exploités. Nous examinons les possibilités de réalisation d'actionneurs à fort couple et puissance massique élevée, pour des applications d'entraînement direct, conçus à partir soit d'une structure synchrone classique utilisant des aimants pour l'inducteur, soit d'une structure à réluctance variable vernier soit, enfin, d'un dispositif combinant l'effet de réluctance variable à l'utilisation d'aimants. Pour permettre une comparaison réellement directe, l'architecture des trois moteurs exploitant les concepts évoqués, ainsi que la forme de leurs principales pièces, seront pratiquement identiques.

  2. "O Ensaio como Forma" ou Um Ensaio acerca da Teoria Critica da Sociedade ("The Essay as Form" or An Essay about the Critical Theory of Society).

    ERIC Educational Resources Information Center

    Giordano, Rosely

    2000-01-01

    Illuminates the critical theory project, with themes permeating the theoretical constructions of Frankfurt (Germany). Debates the predominance of positivism in the production of knowledge. Speculates that "the essay as form" constitutes itself as a representation of the concept of the Enlightenment. Concludes with a dialogue between Theodor Adorno…

  3. Intermitência alfvênica gerada por caos na atmosfera solar e no vento solar

    NASA Astrophysics Data System (ADS)

    Rempel, E. L.; Chian, A. C.-L.; Macau, E. E. N.; Rosa, R. R.

    2003-08-01

    Dados medidos no vento solar rápido proveniente dos buracos coronais revelam que os plasmas no meio interplanetário são dominados por flutuações Alfvênicas, caracterizadas por uma alta correlação entre as variações do campo magnético e da velocidade do plasma. As flutuações exibem muitas características esperadas em turbulência magneto-hidrodinâmica totalmente desenvolvida, tais como intermitência e espectros contínuos. Contudo, os mecanismos responsáveis pela evolução de turbulência Alfvênica intermitente não são completamente compreendidos. Neste trabalho a teoria de caos é usada para explicar como sistemas Alfvênicos, modelados pela equação Schrödinger não-linear derivativa e pela equação Kuramoto-Sivashinsky, podem se tornar fortemente caóticos à medida em que parâmetros do plasma são variados. Pequenas perturbações no parâmetro de dissipação podem fazer com que o sistema mude bruscamente de um regime periódico, ou fracamente caótico, para um regime fortemente caótico. As séries temporais das flutuações do campo magnético nos regimes fortemente caóticos exibem comportamento intermitente, em que fases laminares ou fracamente caóticas são interrompidas por fortes estouros caóticos. É mostrado que o regime fortemente caótico é atingido quando as soluções periódicas ou fracamente caóticas globalmente estáveis interagem com soluções do sistema que são fortemente caóticas, mas globalmente instáveis. Estas soluções globalmente instáveis são conjuntos caóticos não-atrativos conhecidos como selas caóticas, e são responsáveis pelos fortes estouros nos regimes intermitentes. Selas caóticas têm sido detectadas experimentalmente em uma grande variedade de sistemas, sendo provável que elas desempenhem um papel importante na turbulência intermitente observada em plasmas espaciais.

  4. Contribución de la Estación San Juan SLR al Sistema Galileo

    NASA Astrophysics Data System (ADS)

    Podestá, R.; Actis, E.; Alonso, E.; Pacheco, A.; González, A.; Han, Yanben; Wang, Tanqiang; Zhao, Limin; Liu, Chengzhi; Alacoria, J.; Peñaloza, L.; Brizuela, D.; Flores, M.

    The new San Juan Satellite Laser Ranging Station integrates, with number 7406, the International Laser Ranging Service (ILRS) network, being one of the few stations located in the southern hemisphere. It works shooting powerful laser pulses towards satellites at different heights, measuring the time of flight and calculating distances. With this technology we can perform high precision astronomical, geophysical and geodesic studies. Within the full constellation of satellites observed with ILRS, we track the two European pioneer satellites (Giove-A and B) of the future Global Positioning System Galileo, the European competitive response to the currently well established American GPS, of worldwide use. The GPS Galileo will be aimed mostly to civil usage, especially to aerial and terrestrial navigation. The Giove-A satellite was launched out to space on December 28, 2005 from the Baikonur Cosmodrome, on board of the Russian Soyuz rocket. Since mid 2006, 14 Laser Stations -San Juan station included- took part in a follow-up campaign of the Giove-A. Once the satellite orbital behavior was known, a second Giove-B orbiter was launched in April 2008. A constellation of 30 satellites will complete the Galileo system. Since Giove-A orbits the Earth at a height of 23916 kms, only shots from the best SLR world stations can reach it. San Juan station has tracked it, contributing to the study of its motion. As a new station, the San Juan Satellite Laser Ranging Telescope has become one of the best in the world, consequence of a decade of successful Chinese-Argentinean collaboration. FULL TEXT IN SPANISH

  5. Sistemas Eolicos Pequenos para Generacion de Electricidad; Una guia para consumidores en los EE.UU.

    SciTech Connect

    Not Available

    2007-09-01

    This Spanish version of the popular Small Wind Electric Systems: A U.S. Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

  6. Sistemas Eolicos Pequenos para Generacion de Electricidad: Una guia para consumidores en Nuevo Mexico

    SciTech Connect

    Not Available

    2007-09-01

    This Spanish version of the popular Small Wind Electric Systems: A New Mexico Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

  7. Sintesis y caracterizacion de portadores magneticos coloidales. Aplicaciones al diseno de sistemas de liberacion de farmacos

    NASA Astrophysics Data System (ADS)

    Gomez Lopera, Salvador Angel

    2003-10-01

    The present work is mainly dedicated to the synthesis and characterization of composite colloidal particles with a magnetic core (magnetite) and a polymeric biodegradable material shell (poly(DL-lactide), PLA). The aim is to use them as drug carrier systems in the field of controlled (or modified) release. The appropriate synthesis conditions are analyzed for such purpose, starting with the synthesis of the magnetic nuclei, and continuing with that of microspheres of the polymer used later as shell material. The final step is the manufacture of the composite colloids. In order to have a good comparison, all the experiments of the work have been run in triplicate, that is, for the three individual materials (magnetic nuclei, PLA and composite particles magnetite/PLA) and all the discussions are presented by way of parallel study of the three colloidal systems. The following surface and bulk properties have been studied: shape and size of the particles, specific surface area, chemical composition. The magnetic behavior of the nuclei is characterized, as well as that of the composite particles, through measurement of the magnetic susceptibility and the hysteresis cycles. In addition, a study of the electrokinetic behavior of the systems as a function of pH---at constant ionic strength---has been complemented by an investigation of their surface thermodynamics to check the extent of coverage achieved. Very significant results were also obtained in the analysis of the stability of the suspensions. Since our final aim was the design of a drug carrier and controlled release system, we also present a series of preliminary results concerning the effect of the glucocorticoid betamethasone 21-phosphate sodium salt on the surface electrical properties of the three kinds of particles, observing clear differences between the behavior of magnetite particles and of composite or pure polymeric colloids. It is demonstrated that the polymer layer affects considerably the capacity of the colloid for adsorbing this drug and, probably, other drugs of interest in the treatment of those pathologies in which one needs an elevated local concentration of any therapeutic product but without adverse side effects, like those used in the chemotherapy of the solid tumors.

  8. Crecimiento adiabático de un agujero negro en el centro de un sistema estelar

    NASA Astrophysics Data System (ADS)

    Arrigoni, M.; Carpintero, D. D.

    We present preliminary results on the dynamical influence of an adiabatically grown central black hole upon its surroundings. Young (1980), in his pioneer work, found an r-3/2 density profile for the neighborhood of a black hole, a result not confirmed by observation. In this work, we extend Young's result to a more realistic case, namely an inhomogeneous galactic center, although keeping the spherical symmetry hypothesis, in order to verify whether the final density profile changes.

  9. Il sistema multiplo di Spica osservato dal Padre Giovanni Battista Audiffredi nel 1753

    NASA Astrophysics Data System (ADS)

    Sigismondi, Costantino

    2005-06-01

    The multiplicity of Spica's system has been first observed in 1753 by the dominican father Giovanni Battista Audiffredi through a lunar occultation. Audiffredi noted that the emersion's duration from the bright lunar limb was not instantaneous. Nowadays Spica has five known components, four of them have been discovered by occultation. This observation is presented along with a general introduction of lunar occultations, Watts' profiles, Cassini regions and grazes.

  10. Coexistencia e integracion de comunicaciones inalambricas en sistemas de transmision opticos

    NASA Astrophysics Data System (ADS)

    Perez Soler, Joaquin

    Current network and telecommunication systems are required to provide higher data rates in access networks to an increasing number of users. This fact is mainly due to the increase in the Internet traffic data, which is related with the higher demand of online videogames and software, the increased complexity in the content of web pages, the joint distribution of audio-visual and added-value online content, and the introduction of high-definition services and contents such as video on demand, as a result of a society increasingly more interconnected. In order to satisfy these higher data rates requirements, new techniques for the joint distribution of several wireless communication systems are proposed in this Thesis. The aim of these techniques is to facilitate the deployment of an integrated access network at the customer premises, enabling the integration of optical transmission over an optical access network and radio-frequency transmission in the same infrastructure. Two main wireless communication systems are considered in this Thesis, WiMAX (Worldwide Interoperability for Microwave Access) and UWB (Ultra-Wide Band) according to WiMedia Alliance recommendation. Comparing the bit rate and expected range, WiMAX and UWB are complementary radio technologies expected to coexist in a near future in integrated access networks. The optical access network considered in this Thesis can be regarded as a FTTH network (Fibre-to-the-Home). The wireless signals are natively transmitted over optical network, that is, without frequency upconversion and remodulation stages, over one or several optical carriers. This technology, which is known as Radio-over-Fibre (RoF), is well suited for integrated access networks. First, the requirements for the wireless convergence of services based on Multi-Band Orthogonal-Frequency Division-Multiplexing UWB (MB-OFDM UWB) and WiMAX 802.16e in Wireless Personal Area Networks (WPAN) are stated. The aim of this study is to provide relevant protection margins in order to ensure the coexistence between both technologies. The obtained protection margins are of great interest for the development of advanced interference mitigation techniques such as DAA (Detect-and-Avoid), in the framework of future cognitive radio technologies. In a second step, the wireless coexistence of MB-OFDM UWB and WiMAX technologies is analyzed from the point of view of access networks based on RoF systems. Two experimental field trials are here carried out. In the first one, the wireless convergence is evaluated in a multi-mode fibre RoF system, whereas in the second one, the RoF system is based on a standard single-mode fibre. These experimental results provide relevant fibre link transmission distances to enable the deployment of RoF networks. Moreover, a new optical transmission technique based on polarization division multiplexing is proposed and experimentally evaluated in order to ensure the wireless coexistence in RoF systems. Finally, the impact of the electro-optical Mach-Zehnder modulator is analyzed, since the dynamic range of this device limits the performance of the RoF system. Moreover, a new optical linearization technique for Mach-Zehnder modulators is proposed and evaluated in order to overcome this limitation.

  11. Sistemas binarios viuda negra: conectando sus orígenes con su estado final

    NASA Astrophysics Data System (ADS)

    Benvenuto, O. G.; De Vito, M. A.; Horvath, J. E.

    ``Black widow'' systems are located in a well determined region of the plane (where is the mass of the pulsar companion and is the orbital period of the system). An attempt has been made to understand which are the mechanisms that lead to companions of ``black widows'' to be located in this region; since standard binary evolution does not provide a satisfactory response. From our evolutionary calculations; we study the path performed in the plane by a binary system to reach the state of ``black widow''. We also discuss whether there is a connection between ``redbacks'' and ``black widows''. FULL TEXT IN SPANISH

  12. Cuantificacion de la radiacion de la estructura en sistemas de caja cerrada

    NASA Astrophysics Data System (ADS)

    Segura Alcaraz, Jorge G.

    In the present work a contribution to the study of the quantification of the radiation of the structure walls in systems of closed box has been made, establishing a relation of the vibroacustic response of this type of radiating systems with the characteristics of the material used, such as the Young modulus, the damping, or the density. From a general point of view, the object of the work fits within the problems of dynamic fluid-structure interaction, so the presented foundations of the procedures and models, are similar to the used in other dominions of application, like the construction, aeronautics, naval construction, Biology, etc. In order to approach the problem, a mecano-acoustic couple between the different elements from the radiating system is considered. Ideally, in the radiating systems composed of loudspeakers mounted on an acoustic enclosure or box, the walls of the box are considerated infinitely rigid with null movement. In the reality, the experience demonstrates that the walls behave like vibrant plates under the action of the inner pressures, and contribute to the final radiation of sound of the system, mainly in the low frequencies range. To obtain the proposed objective, first a series of experimental measures has been made on models of closed box with and without loudspeaker. In the experimental procedure the vibracional behavior of the walls of the structure has been studied by means of modal analysis and measures of vibration. The acoustic response of the systems is evaluated by means of measures of acoustic pressure and intensity. Next, numerical models of the loudspeaker, inner air and structure have been implemented. The implemented numerical models are mechanical-acoustic, the electrical part of the loudspeaker has been replaced by a harmonic excitation force. The first numerical model is three-dimensional, looking for obtaining a simulation of the simultaneous interaction of the three main elements of the system: the inner air of the box, the diaphragm of the loudspeaker, and the walls of the box. Moreover another numerical model in two dimensions has been implemented, adding the air outside of the box, and obtaining a fluid-structure-fluid couple. With both models a parametric study been made. In sumary the structure colors the sonorous response of the system in all the studied frequency range, due to resonances or forced vibrations of the walls. On the other hand the proposed numerical model supposes an advance with respect to the presented ones until the moment. The model constitutes a design tool that allows to study in an economic form, the importance of the structure in the sonorous response of the system.

  13. Investigacion Participativa y Gestion de Sistemas Educativos. (Participatory Research and the Management of Educational Systems).

    ERIC Educational Resources Information Center

    Valle, Victor M.

    Elements which, when put in harmony, might generate powerful tools for social change and educational development are (1) the ever present need of the educational systems to evaluate their performance; (2) the universal acceptance of the life-long education concept as a major guideline to design educational programs; (3) the trend toward a…

  14. Una guia a los padres acerca del sistema educacional = A Parent's Guide to Education. Spanish Edition.

    ERIC Educational Resources Information Center

    Rowch, Nancy

    A guide for Spanish-speaking parents of elementary and secondary school students in Nebraska provides in Spanish, and then in English, information concerning education in the state. Topics covered include: state policy concerning enrolling children in school, medical requirements for enrollment and attendance, the school curriculum requirements…

  15. Curso Introductorio sobre el Sistema DIALOG (Introductory Course on the DIALOG System).

    ERIC Educational Resources Information Center

    Rodriguez, Ketty

    As an introduction to the use of the DIALOG online retrieval service, this guide presents material that was developed during a fellowship at Carlos III University, School of Library Science and Documentation, Madrid (Spain) and that is based on a course on the same subject taught in English at Texas Women's University. Although the use of DIALOG…

  16. The Solar System/El Sistema Solar--A Fully Integrated Instructional Unit.

    ERIC Educational Resources Information Center

    Van Heukelem, Tom; Mercado, Maria de Jesus

    This lesson plan for the second grade uses information on the solar system to provide science education for limited-English-proficient (LEP) students in San Diego, California. The lesson has been developed to be taught in a bilingual class, a Spanish-language immersion class, or a two-way bilingual class. Lessons are arranged so that native…

  17. Estudio de la Velocidad de Rotacion EN LOS Sistemas Estelares a Simetria Axial

    NASA Astrophysics Data System (ADS)

    Sanz, J.; Catala, M. A.

    1986-12-01

    This paper contains the calculation of the tangential component of the velocity for a model of galaxy with axial symmetry, non.stationary state and equatorial symmetry plane, from the postulates and fundamental equations of Chandrasekhar theory, that shows a shift of the maximum for different values of the Z coordinate and the 0 direction. Key words: STELLAR DYNAMICS - STELLAR SYSTEMS

  18. Imagens do céu ontem e hoje - um multimídia interativo de astronomia e uma nova exposição no MAST

    NASA Astrophysics Data System (ADS)

    Caretta, C. A.; Lima, F. P.; Requeijo, F.; Vieira, G. G.; Alves, F.; Valente, M. E. A.; de Almeida, R.; de Garcia, G. C.; Quixadá, A. C.

    2003-08-01

    "Imagens do Céu Ontem e Hoje" é o título de uma nova exposição que está sendo inaugurada no Museu de Astronomia e Ciências Afins (MCT), que inclui experimentos interativos, maquetes, réplicas e 8 terminais de computador com um multimídia interativo sobre Astronomia para consulta dos visitantes. O multimídia apresenta um conteúdo bastante extenso, que engloba quase todos os temas em Astronomia, consistindo numa fonte de divulgação e pesquisa para um público que vai das crianças até estudantes universitários. O conteúdo está distribuído em mais de 500 páginas de texto divididas em 4 módulos: "O Universo", "Espectroscopia", "Telescópios" e "Observando o Céu". Cada módulo é subdividido em 5 seções, em média, cada uma iniciada por uma animação que ilustra os temas a serem abordados na seção. Ao final da animação, uma lista de temas é apresentada sob o título "Saiba Mais". Para exemplificar, o módulo "O Universo" contém as seguintes seções: "O Universo visto pelo homem", "Conhecendo o Sistema Solar", "Indo além do Sistema Solar", "Nossa Galáxia, a Via-Láctea" e "Indo mais além, a imensidão do Universo". A seção "Conhecendo o Sistema Solar", por sua vez, tem os seguintes temas: "A origem do Sistema Solar", "O Sol", "Os planetas", "Satélites, asteróides, cometas e outros bichos..." e "O Sistema Solar em números". Cada texto é repleto de imagens, quadros, desenhos, esquemas, etc, além de passatempos ao final de cada seção, incluindo jogos interativos, quadrinhos e curiosidades, que auxiliam o aprendizado de forma divertida. Apresentamos neste trabalho as idéias gerais que permearam a produção da exposição, e uma viagem pelo multimídia para exemplificar sua estrutura e conteúdo. O multimídia será posteriormente disponibilizado para o público externo pela página eletrônica do MAst e/ou por intermédio de uma publicação comercial.

  19. Base de linhas moleculares para síntese espectral estelar

    NASA Astrophysics Data System (ADS)

    Milone, A.; Sanzovo, G.

    2003-08-01

    A análise das abundâncias quí micas fotosféricas em estrelas do tipo solar ou tardia, através do cálculo teórico de seus espectros, emprega a espectroscopia de alta resolução e necessita de uma base representativa de linhas atômicas e moleculares com suas respectivas constantes bem determinadas. Nesse trabalho, utilizamos como ponto de partida as extensas listas de linhas espectrais de sistemas eletrônicos de algumas moléculas diatômicas compiladas por Kurucz para a construção de uma base de linhas moleculares para a sí ntese espectral estelar. Revisamos as determinações dos fatores rotacionais de Honl-London das forças de oscilador das linhas moleculares, para cada banda vibracional de alguns sistemas eletrônicos, seguindo a regra usual de normalização. Usamos as forças de oscilador eletrônicas da literatura. Os fatores vibracionais de Franck-Condon de cada banda foram especialmente recalculados empregando-se novas constantes moleculares. Reproduzimos, com êxito, as absorções espectrais de determinadas bandas eletrônicas-vibracionais das espécies moleculares C12C12, C12N14 e Mg24H em espectros de estrelas de referência como o Sol e Arcturus.

  20. Alternancia entre el estado de emisión de Rayos-X y Pulsar en Sistemas Binarios Interactuantes

    NASA Astrophysics Data System (ADS)

    De Vito, M. A.; Benvenuto, O. G.; Horvath, J. E.

    2015-08-01

    Redbacks belong to the family of binary systems in which one of the components is a pulsar. Recent observations show redbacks that have switched their state from pulsar - low mass companion (where the accretion of material over the pulsar has ceased) to low mass X-ray binary system (where emission is produced by the mass accretion on the pulsar), or inversely. The irradiation effect included in our models leads to cyclic mass transfer episodes, which allow close binary systems to switch between one state to other. We apply our results to the case of PSR J1723-2837, and discuss the need to include new ingredients in our code of binary evolution to describe the observed state transitions.

  1. Study of apsidal motion in massive close binary systems. (Spanish Title: Estudio del movimiento apsidal en sistemas binarios masivos)

    NASA Astrophysics Data System (ADS)

    Ferrero, G.; Gamen, R.; Fernández-Lajús, E.

    In O+OB close binary systems, superior order momenta of the classical gravitational potential and general relativity effects produce a secular motion of the apsides. This phenomenon, together with theoretical stellar structure models, can be used to estimate the absolute masses of the system components, even for non-eclipsing binaries. We are conducting a spectroscopic study of eccentric close O+OB binaries in order to detect or confirm the existence of apsidal motion, determine its rate, and calculate the absolute masses of the stars. In this work we describe the current status of the project and present some preliminary results obtained for the systems iota Ori A, HD 93205, HD 152248, and HD 165052.

  2. Life Support Systems. Environment Booklet 1. Teacher's Edition=Sistemas vitales. Libro del medio ambiente 1. Manual para El Maestro.

    ERIC Educational Resources Information Center

    California State Univ., Los Angeles. National Dissemination and Assessment Center.

    The booklet is part of a grade 10-12 social studies series produced for bilingual education. The series consists of six major thematic modules, with four to five booklets in each. The interdisciplinary modules are based on major ideas and designed to help students understand some major human problems and make sound, responsive decisions to improve…

  3. Estudio general de la region del Lago Titicaca evaluando en forma preliminar un sistema de analisis interactivo de imagenes multiespectrales

    USGS Publications Warehouse

    Brockmann, C.E.; Carter, William D.

    1976-01-01

    ERTS-1 digital data in the form of computer compatible tapes provide the geoscientist with an unusual opportunity to test the maximum flexibility of the satellite system using interactive computers, such as the General Electric Image 100 System. Approximately 9 hours of computer and operator time were used to analyze the Lake Titicaca image, 1443-14073, acquired 9 October 1973. The total area of the lake and associate wetlands was calculated and found to be within 3 percent of previous measurements. The area was subdivided by reflectance characteristics employing cluster analysis of all 4 bands and later compared with density values of band 4. Reflectance variations may be attributed to surface roughness, water depth and bottom characteristics, turbidity, and floating matter. Wetland marsh vegetation, vegetation related to ground-water effluents, natural grasses, and farm crops were separated by cluster analysis. Sandstone, limestone, sand dunes, and several volcanic rock types were similarly separated and displayed by assigned colors and extended through the entire scene. Waste dumps of the Matilde Zinc Mine and smaller mine workings were tentatively identified by signature analysis. Histograms of reflectance values and map printouts were automatically obtained as a record of each of the principal themes. These themes were also stored on a work tape for later display and photographic record as well as to serve in training. The Image 100 System is rapid, extremely flexible and very useful to the investigator in identifying subtle features that may not be noticed by conventional image analysis. The entire scene, which covers 34,225 km2, was analyzed at a scale of 1:600,000, and portions at 1:98,000 and 1:25,000, during a 9-hour period at a rental cost of $250 per hour. Costs to the user can be reduced by restricting its uses to specific areas, objectives, and procedures, rather than undertaking a complete analysis of a total scene.

  4. Sistemas Eolicos Pequenos para Generacion de Electridad (Spanish version of Small Wind Electric Systems: A U.S. Consumer's Guide)

    SciTech Connect

    Not Available

    2005-07-01

    This Spanish version of the popular Small Wind Electric Systems: A U.S. Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

  5. Region Emilia Romagna: Primary Health Care Integration/Regione Emilia-Romagna: l’integrazione nel sistema di Cure Primarie

    PubMed Central

    Basenghi, Maria

    2012-01-01

    The politics of Region Emilia-Romagna have been meant to improve social and health care integration through an architecture of local services coherent with this purpose, setting up a Department dedicated to Primary Care inside the Social and Health District. The territorial basis of the Local Health Units (LHU), the resident people, the sustained public spending, the employed human resources and the provided services all delineate the organization of the LHU. The purpose is to grant strong integration among local bodies and LHUs through a governance system (planning, management and administration) that makes a distinction between commissioning and supply. The Committenza (commissioning department), which reports to the Strategic Direction and the District, directs the offer in connection with the need analysis, whereas the Primary Care Department arranges activities and provides services by means of integrated networks which ensure continuity to the care. The main hub in the network is known as the Casa della Salute (House of Health), which works through structured practices, protocols and procedures. LHU professionals and freelancers under contract supply primary, in-home and nursing home care, plus specialist outpatient treatment. The Casa della Salute, whose size will depend on the context (large, medium and small), are reliable reference points for citizens, who can address to them in every moment of the day. On behalf of the Regione Emilia-Romagna, it is the Primary Care Observatory which registers the functions existing in the 42 Houses of Health and their organizational and structural characteristics. The analysis of the obtained data will increase enhance the Houses’ implementation.

  6. Influencia de diferentes ecuaciones de transformacion del sistema UBVal RGU en el estudio fotometrico de cumulos galacticos.

    NASA Astrophysics Data System (ADS)

    Huestamendia Aparicio, G.

    Three-colour photometry of ten open clusters in the RGU system has been carried out. The calibration sequence has been defined using the Buser's transformation equations between the UBV and RGU systems, while in earlier works the Steinlin's formulae have been used. The results have been compared with those given in these works. Some differences have been found in G, G-R and U-G as a function of the spectral type and the interstellar absorption. They have a systematic character.

  7. La producción de cráteres en el Sistema de Satélites de Saturno

    NASA Astrophysics Data System (ADS)

    Zanardi, M.; Di Sisto, R. P.

    The saturnian satellite system has been observed by the Cassini-Huygens mission, in particular the impact craters on them. These satellites present a diversity of surfaces which could help us to understand about their history. To study the production of craters on these satellites, we develop a theoretical model from previous simulations and we obtain the contribution of Centaur objects to the production of craters. We calculate the number of craters for a given size and the greatest crater produced by Centaur objects. This allowed us to compare our theoretical results with the observations by the Cassini-Huygens and determine the origin of craters as well as constrain the size distribution of Centaurs. FULL TEXT IN SPANISH

  8. Cuerpo de Paz Manual de Sistema de Programacion y Capacitacion (Peace Corps Programming and Training System Manual): T0063.

    ERIC Educational Resources Information Center

    Peace Corps, Washington, DC.

    This Spanish version of the Peace Corps Programming and Training System Manual is designed to help field staff members of the Peace Corps train volunteers. Its task descriptions, guidelines, examples, and definitions are intended to be practical and informative rather than restrictive. The manual is divided into six major sections: (1)…

  9. Exploring the Academic and Psychosocial Impact of El Sistema-Inspired Music Programs within Two Low Socio-Economic Schools

    ERIC Educational Resources Information Center

    Osborne, Margaret S.; McPherson, Gary E.; Faulkner, Robert; Davidson, Jane W.; Barrett, Margaret S.

    2016-01-01

    We sought to understand the potential for positive non-musical outcomes for economically and socially disadvantaged primary school students who are involved in instrumental music learning programs. Two schools with students experiencing generational poverty, current or first-generation immigrant or refugee status who were running El-Sistema…

  10. Efectos difusivos en la formación de enanas blancas de Helio de baja masa en sistemas binarios cerrados

    NASA Astrophysics Data System (ADS)

    De Vito, M. A.; Benvenuto, O. G.

    In the last years, and thanks to advances in observational techniques, many astronomers have discovered in a great number of binary radio-pulsars the presence of a helium white dwarf resulting from a previous evolutionary state in which the progenitor of this star experienced one or more episodes of mass transfer to the compact component in the pair. That is the case for PSR B1855+09 (van Kerkwijk, M. H., Bell, J. F, Kaspi, V. M., & Kulkarni, S. R. 2000, ApJ 530, L37), where the mass for the white dwarf is known accurately from measurements of the Shapiro delay of the pulsar signal, MWD = 0.258+0.028-0.016 M⊙; for PSR J02018 + 4232 (Bassa, C. G., van Kerkwijk, M. H., & Kulkarni, S. R. 2003, A&A, 403, 1067), the spectra confirm that the companion is a helium-core white dwarf of ≈ 0.2 M⊙. On the other hand, there are several authors (Ferraro, F., Possenti, A., Sabbi, E., & D'Amico, N. 2003, ApJ, 596, L211; Bassa et al. 2003) that have identified the optical binary companion to the BMSP PSR J1911 - 5958A, located in the halo of the Galactic globular cluster NGC 6752, like a blue star whose position in the color-magnitude diagram is consistent with the cooling sequence of a low-mass, ≈ 0.17 - 0.20 M⊙, low metallicity helium white dwarf at the cluster distance. Finally, the color and magnitude of the stellar companion for B 1620-26 indicate that is a white dwarf of 0.34 ± 0.04 M⊙ (Sigurdson, S., Richer, H. B., Hansen, B. M., Stairs, I. H. & Thorset, S. E. 2003, Science, 301, 193S). This has motivated us to study the formation of low mass helium white dwarfs in the context of binary evolution. For that purpose, using the code of binary evolution, entirely developed in the Facultad de Ciencias Astronómicas y Geofísicas of the Universidad Nacional de La Plata, Argentina, we have investigated the effects of diffusive processes on the evolution of a star member of a close binary system. A similar study was performed for Althaus, L. G., Serenelli, A. M., & Benvenuto, O. G. (2001, MNRAS, 323, 471) but in that paper the mass transfer was mimicked by subtracting mass to a progenitor of 1 M⊙ to obtain the mass for the desired object. Actually, our binary code has a full nuclear reactions network for hydrogen and helium burning that allowed us to follow the abundances of fifteen isotopes throughout the entire evolution of the star. We have also included a detailed equation of state. The mass loss treatment is non conservative. We have modified the conditions for the beginning and end of mass transfer episodes. In our previous version, we assumed it to occur when the stellar radius was greater or smaller, respectively, that the Roche Lobe radius for the star. This introduced numerical problems, especially at the end of mass transfer phases. We adopted H. Ritter (1988, A&A, 202, 93) formulation that considers a finite scale height in the stellar atmosphere. The numerical behaviour in much more satisfactory, besides that it constitutes a more appropriate description for the physical problem. We perform the calculations for the evolution of the primary star in a close binary system of initial mass 2 M⊙, initial period of 1 day, initial mass ratio of 1.4142 and solar metallicity. We have done the calculations in four cases: A) with diffusion and all Roche Lobe overflows, B) with diffusion and only the first Roche Lobe overflow, C) without diffusion and all Roche Lobe overflows, D) without diffusion and only the first Roche Lobe overflow. Cases B) and D) where performed to compare with results obtained for Althaus et al. (2001). The main conclusion of this work is that the age of these objects is mainly determined by diffusive effects, and the late stages of mass transfer, not considered in Althaus et al. (2001), constituted a minor effect on the scales of cooling times.

  11. Sistema Solar: de la observación de La Tierra a los planetas gigantes y sus lunas

    NASA Astrophysics Data System (ADS)

    Rodrigo, R.

    La fotoquímica tiene un papel principal en la composición de las atmósferas planetarias. Se examinan diferentes procesos fotoquímicos tanto para atmósferas oxidadas como reductoras, poniendo un especial énfasis en los ciclos químicos más importantes. En este sentido, se presentan diferentes ciclos químicos capaces de producir hidrocarbonos y nitrilos en atmósferas reductoras, así como aquellos capaces de mantener las proporciones de mezcla de las moléculas que contienen oxígeno, tales como CO2, O2 y H2O. También se analizan otros procesos importantes tales como la condensación y procesos de sputtering y de sublimación que han de tenerse en cuenta cuando se realizan modelos sobre la composición atmosférica.

  12. Gradiente radial de [Mg/Fe] em duas galáxias elípticas

    NASA Astrophysics Data System (ADS)

    Milone, A.; Capelato, H.

    2003-08-01

    Basicamente, são propostos dois cenários de evolução quí mio-dinâmico para os sistemas esferoidais: (i) o hierárquico através da fusão e/ou acresção de sub-sistemas com ou sem surtos de formação estelar, e (ii) o colapso monolí tico dissipativo com formação estelar interrompida por um vento galáctico. Ambos, dentro de certos limites, conseguem explicar os gradientes internos de metalicidade estelar presentes nas galáxias elí pticas bem como a relação observada entre a metalicidade central e a massa (Mg20 vs. log sv0). No entanto, nenhum prevê uma variação interna para a razão de abundâncias Mg/Fe que indiretamente define a escala temporal da formação estelar. Empregamos a espectroscopia óptica de fenda longa com a finalidade de recuperar as histórias de formação estelar, de enriquecimento quí mico e da dinâmica dentro de determinadas regiões das galáxias. Os espectros de média resolução (FWHM = 7,1 Å) e escala angular de 1,092 arcsec/pixel foram coletados com o telescópio 1,60m do OPD/LNA. Comparamos nossas medidas de linhas de absorção com resultados espectrofotométricos de modelos de populações estelares simples - mais especificamente os í ndices do Sistema Lick como Mg2, Mg b, < Fe > e Hb - a fim de se investigar as variações internas de [Fe/H], [Mg/Fe] e idade. Para duas galáxias elí pticas, NGC 1052 e NGC 7796, pertencentes a ambientes de baixa densidade, encontramos uma variação radial da razão Mg/Fe decrescente do centro para fora em regiões de 0,6 e 1 raio efetivo respectivamente. Discutimos alguns cenários de enriquecimento quí mico para estas duas galáxias.

  13. Rationale and design of the Patient Related OuTcomes with Endeavor versus Cypher stenting Trial (PROTECT): randomized controlled trial comparing the incidence of stent thrombosis and clinical events after sirolimus or zotarolimus drug-eluting stent implantation.

    PubMed

    Camenzind, Edoardo; Wijns, William; Mauri, Laura; Boersma, Eric; Parikh, Keyur; Kurowski, Volkhard; Gao, Runlin; Bode, Christoph; Greenwood, John P; Gershlick, Anthony; O'Neill, William; Serruys, Patrick W; Jorissen, Brenda; Steg, P Gabriel

    2009-12-01

    Drug-eluting stents (DES) reduce restenosis rates compared to bare-metal stents. Most trials using DES enrolled selected patient and lesion subtypes, and primary endpoint focused on angiographic metrics or relatively short-term outcomes. When DES are used in broader types of lesions and patients, important differences may emerge in long-term outcomes between stent types, particularly the incidence of late stent thrombosis. PROTECT is a randomized, open-label trial comparing the long-term safety of the zotarolimus-eluting stent and the sirolimus-eluting stent. The trial has enrolled 8,800 patients representative of those seen in routine clinical practice, undergoing elective, unplanned, or emergency procedures in native coronary arteries in 196 centers in 36 countries. Indications for the procedure and selection of target vessel and lesion characteristics were at the operator's discretion. Procedures could be staged, but no more than 4 target lesions could be treated per patient. Duration of dual antiplatelet therapy was prespecified to achieve similar lengths of treatment in both study arms. The shortest predefined duration was 3 months, as per the manufacturer's instructions. The primary outcome measure is the composite rate of definite and probable stent thrombosis at 3 years, centrally adjudicated using Academic Research Consortium definitions. The main secondary end points are 3-year all-cause mortality, cardiac death, large nonfatal myocardial infarction, and all myocardial infarctions. This large, international, randomized, controlled trial will provide important information on comparative rates of stent thrombosis between 2 different DES systems and safety as assessed by patient-relevant long-term clinical outcomes. PMID:19958855

  14. Lignes directrices sur l’aiguillage des cas soupçonnés de cancer du poumon par un médecin de famille ou autre professionnel des soins primaires

    PubMed Central

    Del Giudice, M. Elisabeth; Young, Sheila-Mae; Vella, Emily T.; Ash, Marla; Bansal, Praveen; Robinson, Andrew; Skrastins, Roland; Ung, Yee; Zeldin, Robert; Levitt, Cheryl

    2014-01-01

    Résumé Objectif Les présentes lignes directrices visent à aider les médecins de famille et autres généralistes à reconnaître les manifestations cliniques devant éveiller les soupçons quant à la présence d’un cancer du poumon chez les patients. Composition du comité Les membres du comité ont été choisis parmi les leaders régionaux en soins primaires du Réseau provincial des soins primaires et de la lutte contre le cancer d’Action Cancer Ontario et parmi les membres du Groupe sur le siège de la maladie, Cancer du poumon d’Action Cancer Ontario. Méthodes Les présentes lignes directrices sont le fruit d’une revue systématique des données probantes, d’une synthèse des données et d’un examen externe formel effectué par des intervenants canadiens qui ont validé la pertinence des recommandations. Rapport Ces lignes directrices fondées sur des données probantes ont été formulées pour améliorer la prise en charge en contexte canadien des patients qui présentent des manifestations cliniques du cancer du poumon. Conclusion Le dépistage et l’aiguillage précoces des patients atteints de cancer du poumon pourraient en fin de compte aider à réduire les morbidités et mortalités liées au cancer. Ces lignes directrices pourraient aussi s’avérer utiles dans la mise sur pied de programmes de diagnostic du cancer du poumon et pour aider les décideurs à veiller à ce que les ressources appropriées soient en place.

  15. Superfund record of decision (EPA Region 10): US DOE Idaho National Engineering Laboratory (O.U. 4-12 and 4-03), Idaho Falls, ID, September 28, 1995

    SciTech Connect

    1996-05-01

    This decision document presents the selected remedial action for the Central Facilities Area (CFA) Landfills I, II, and III located at the Idaho National Engineering Laboratory (INEL). Due to the uncertainty associated with the landfill contents and the need for containment of the landfill contents, a remedial action of containment is waranted for the site, even though the risk assessment indicates that the CFA landfills do not currently present an unacceptable risk to human health or the environment. Implementation of the remedial action selected in this ROD will provide for containment of the waste with a native soil cover, institutional controls, and monitoring.

  16. News and Views: Space technology in the oil industry; OU to play role in next stage of Mars exploration; Viking revisited; Wish you were here? GOCE gets going again

    NASA Astrophysics Data System (ADS)

    2010-10-01

    The troubles flowing from BP's Macondo oil well in Gulf of Mexico have focused attention on the technological demands of safe deep-water drilling. European Space Agency research presented in a Space and Energy Seminar in August offers spin-off technologies that could support oil exploration and production in extreme environments, from corrosion control to better robotics. NASA and the European Space Agency have embarked on a joint programme to study the chemical composition of the atmosphere of Mars from 2016. They have just announced the providers of five scientific instruments for the first mission, including two consortia in which the Open University has a major role.

  17. La Carriere: Chance ou Planification? = Career: Chance or Planning? = Cariera: Sansa sau Planificare? Proceedings of the Annual Meeting of the International Association for Educational and Vocational Guidance (Brasov, Romania, September 22-24, 1997).

    ERIC Educational Resources Information Center

    Cujba, Andrei, Ed.; Westfried, Stefan, Ed.

    1997-01-01

    These proceedings consist of 62 presentations (21 written in French, 19 in English, 21 in Romanian, 1 in Spanish). The foreword appears in French, English, and Romanian. Papers written in English include the following:"Vocational Guidance and Change of Career: The New Demands" (Graciela Canessa); "Intervention Strategies. Youth…

  18. Les Sciences Physiques À L'école Maternelle: Un Cadre Sociocognitif Pour La Construction Des Connaissances ET/OU LE Développement Des Activités Didactiques

    NASA Astrophysics Data System (ADS)

    Ravanis, Konstantinos

    2005-05-01

    NATURAL SCIENCES IN KINDERGARTEN: A SOCIO-COGNITIVE FRAMEWORK FOR LEARNING AND TEACHING - The present study presents a socio-cognitive framework for the construction of the scientific knowledge of natural phenomena among pre-school children and for the development of science activities at kindergarten. It involves elements from theories of social interaction; social psychology of development and cognitive functioning; and research in natural-science teaching methods which acknowledge the importance and fundamental role of social interaction in the development of cognitive operations and learning. The study also presents some of the more significant results of the research carried out on different aspects of this topic. The discussion unfolded here supports the hypothesis that the construction of natural-scientific knowledge at the pre-school age and corresponding scholastic activities are necessary and effective.

  19. Repertoire de didacticiels de francais langue seconde ou etrangere publies entre 1980 et 1988 (List of Courseware for French as a Second or Foreign Language Published between 1980 and 1988). Publication K-11.

    ERIC Educational Resources Information Center

    H.-Lemonnier, France; And Others

    A listing of 97 items of courseware includes programs in seven categories, pertaining to: (1) vocabulary; (2) grammar; (3) verb conjugation; (4) syntax and/or morphosyntax; (5) reading and/or writing; (6) oral language; and (7) other areas of French second language instruction. Each citation includes the title, program type (e.g. drill, game),…

  20. Mise en évidence, synthèse et caractérisation de nouveaux composés : les chlorures doubles d'ammonium et de calcium anhydres ou hydratés

    NASA Astrophysics Data System (ADS)

    Tenu, R.; Berthet, J.; Etoh, M. A.; Counioux, J. J.

    2004-12-01

    The study of materials with phase change, often indicated PCM, has been developed because of their storage capacity of calorific or refrigerating energy. Their applications relate to the habitat, the transport, the protection of the electronic circuits exposed to strong variations in temperature or to the conservation of deep-frozen foods. A systematic study of the ternary system H2O-NH4Cl-CaCl2 was then undertaken at various temperatures by using different techniques like Isoplethic Thermal Analysis (I.T.A.), T.G.A., D.T.A. and X Ray diffraction. Five invariant transformations and three new ternary compounds are observed within the temperature range -20 / 70 °C. Finally, it appears that the calcium and ammonium chlorides form a rich family of anhydrous and hydrated double salts.

  1. Non-contact laser speckle sensor for measuring one- and two-dimensional angular displacement Capteur non-contact de laser speckle pour mesurer le déplacement angulaire à une ou deux dimensions

    NASA Astrophysics Data System (ADS)

    Rose, Bjarke; Imam, Husain; Hanson, Steen G.

    1998-06-01

    A novel method for measurement of angular displacement in one or two dimensions for arbitrarily shaped objects is presented. The method is based on Fourier transforming the scattered field from a single laser beam that illuminates the target. The angular distribution of the light field at the target is linearly mapped onto an array image sensor placed in the Fourier plane. Measuring this displacement facilitates the determination of the angular displacement. It is demonstrated both theoretically and experimentally that the angular displacement sensor is insensitive to object shape, target distance and any longitudinal or transverse movement of the target, if the image sensor is placed in the Fourier plane. A straightforward procedure to place the image sensor in the Fourier plane is presented here. Theoretically and experimentally, it is shown that the method has a resolution of 0.3 mdeg for small angular displacements, and methods for further improvement in resolution are discussed. No special surface treatment is required for surfaces having irregularities of the order of or larger than the wavelength of the incident light. It is shown that this is the case for most surfaces of practical interest. Furthermore, it is shown that robust, non-contact optical systems for industrial applications can be produced.

  2. Enseigner aux eleves ayant des troubles emotionnels et (ou) des psychopathologies. Elabore pour les eleves ayant des besoins speciaux (Teaching Students with Emotional Disorders and/or Mental Illnesses. Elaborated for Eligible Special Needs Students).

    ERIC Educational Resources Information Center

    Alberta Learning, Edmonton. Direction de l'education francaise.

    This resource manual, in French, is designed to assist Alberta teachers in the identification and education of students with emotional disorders and/or mental illnesses. It takes a comprehensive look at six emotional disorders. The first section focuses on eating disorders. It describes the characteristics and symptoms of anorexia nervosa, bulimia…

  3. The autographa californica multiple nucleopolyhedrovirus ODV-E56 envelope protein is required for oral infectivity and can be functionally substituted by rachiplusia ou multiple nucleopolyhedrovirus ODV-E56

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The Autographa californica multiple nucleopolyhedrovirus (AcMNPV) odv-e56 gene encodes an occlusion-derived virus (ODV)-specific envelope protein, ODV-E56. In a previous analysis, the odv-e56 gene was found to be under positive selection pressure, suggesting that it may be a determinant of viral ho...

  4. Lignes directrices sur l’aiguillage des cas soupçonnés de cancer colorectal par un médecin de famille ou autre professionnel des soins primaires

    PubMed Central

    Del Giudice, M. Elisabeth; Vella, Emily T.; Hey, Amanda; Simunovic, Marko; Harris, William; Levitt, Cheryl

    2014-01-01

    Résumé Objectif Ces lignes directrices ont pour but d’aider les médecins de famille et les autres professionnels des soins primaires à reconnaître les caractéristiques qui devraient susciter leurs soupçons quant à la présence d’un cancer colorectal (CCR) chez leurs patients. Composition du comité Les membres du comité ont été choisis parmi les dirigeants régionaux des soins primaires au sein du Réseau provincial des soins primaires et de la lutte contre le cancer, les membres du Comité consultatif sur le dépistage du cancer colorectal de l’Ontario et les membres du Groupe sur le siège de la maladie, Cancer gastrointestinal, d’Action Cancer Ontario. Méthodes Ces lignes directrices sont le fruit d’une revue systématique et d’une synthèse des données probantes, ainsi que d’un examen formel par des intervenants canadiens pour valider la pertinence des recommandations. Rapport Des lignes directrices fondées sur des données probantes ont été élaborées pour améliorer la prise en charge des patients qui présentent des caractéristiques cliniques d’un CCR et ce, dans le contexte canadien. Conclusion Un équilibre judicieux entre une suspicion de CCR et le niveau de risque d’un tel cancer devrait favoriser une demande de consultation en temps opportun par les médecins de famille et les professionnels des soins primaires. Ces lignes directrices pourraient aussi orienter les décisions de demander une consultation à des programmes d’évaluation diagnostique du CCR.

  5. Modalités de prise de décision chez les filles et les garçons en la présence ou en l'absence de l'enseignant

    NASA Astrophysics Data System (ADS)

    Zghibi, Makram; Sahli, Hajer; Jabri, Mohamed; Ouelhezi, Samira; Guelmemi, Noomen; Wallian, Nathalie

    2013-12-01

    How girls and boys take decisions in the presence and absence of a teacher - This work is part of an innovative approach to physical and sports education in Tunisia, and team sports in particular. It uses language studies carried out within the framework of this teaching both to generate a reflective attitude on the part of students, and to identify the effect of gender as a variable in the ways in which they make decisions. Discourse analysis highlights the importance of language output by girls and boys in football teaching when a teacher is present or absent. The teacher is an institutional authority who imposes specific uses of language, and when he/she is absent, emotional tensions predominate and may reflect the repression of ideas that occurs when the teacher is present. Although girls appear to take part in the discussion, their utterances are fewer in number, and their analytical statements less effective than those of boys. Girls never gain the upper hand over boys. The study also suggests a redefinition of social role divisions on the basis of gender - masculinity and femininity.

  6. Fiches pratiques: Modalites logiques; De l'image au recit; Trois lettres; Ou est la Provence (Practical Ideas: Logical Modalities; From Picture to Words; Three Letters; Where Is Provence).

    ERIC Educational Resources Information Center

    Gasser, Rachel Beatrice; And Others

    1993-01-01

    Four ideas for classroom French instruction are described, including a lesson in the use of indicative and subjunctive moods; creative writing exercises; a comparison of the text styles of letters with different purposes; and a beginning French geography lesson. (MSE)

  7. L'enseignement d'une langue (non-maternelle ou maternelle) aux apprenants en difficulté et aux enfants issus de milieux socialement défavorisés

    NASA Astrophysics Data System (ADS)

    Wambach, Michel

    1986-06-01

    Official statistics reveal a high percentage of school failure at primary-school level in Belgium, notably among children from socially disadvantaged backgrounds, be they francophone or foreign. Furthermore, the percentage of adult illiteracy is rising. These situations share a common root: the methodology of the mother tongue at school and the approach to the written language in particular. After defining the psychological objective of a language course the present study proposes a methodology, a synthesis of up-to-date psycho-pedagogical, linguistic and (neuro) biological trends. The data from this research make it possible to verify the working hypotheses which have been elaborated and revised over the last twenty years. Within the recommended methodology, the libération de la parole (`liberation of speech') occupies an important place. This initial stage increases and reinforces the creative dispositions in the child and prepares for real language activities. These help the child to communicate and enable a functional learning of the language. The methodology of reading takes into account research conducted on the operation of the memory and the selective activity of the brain. A first evaluation of the methodology has verified the working hypotheses. Moreover, the pupils in the experimental classes obtained markedly higher grades in tests such as reading comprehension, elaborating texts and in those tests calling for imagination and creativity.

  8. Detecção inesperada de efeitos de lentes fracas em grupos de galáxias pouco luminosos em raios-X

    NASA Astrophysics Data System (ADS)

    Carrasco, R.; Mendes de Oliveira, C.; Sodrã©, L., Jr.; Lima Neto, G. B.; Cypriano, E. S.; Lengruber, L. L.; Cuevas, H.; Ramirez, A.

    2003-08-01

    Obtivemos, como parte do programa de verificação científica do GMOS Sul, imagens profundas de três grupos de galáxias: G97 e G102 (z~0,4) e G124 (z = 0,17). Esses alvos foram selecionados a partir do catálogo de fontes extensas de Vikhlinin (1998), por terem luminosidades em raios X menores que 3´1043 ergs s-1, valor cerca de uma ou duas ordens de grandeza inferior ao de aglomerados de galáxias. O objetivo primário dessas observações é o estudo da evolução de galáxias em grupos. Grupos são ambientes menos densos que aglomerados, contêm a grande maioria das galáxias do Universo mas que, até o momento, foram estudados detalhadamente apenas no Universo local (z~0). Com esses dados efetuamos uma análise estatística da distorção na forma das galáxias de fundo (lentes gravitacionais fracas) como forma de inferir o conteúdo e a distribuição de massa nesses grupos apesar de que, em princípio, esse efeito não deveria ser detectado uma vez que os critérios de seleção adotados previlegiam sistemas de baixa massa. De fato, para G124 obtivemos apenas um limite superior para sua massa que é compatível com sua luminosidade em raios X. De modo contrário e surpreendente, os objetos G102 e G097, aparentam ter massas que resultariam em dispersões de velocidade maiores que 1000 km s-1, muito maiores do que se espera para grupos de galáxias. Com efeito, para G097 obtivemos, a partir de dados do satélite XMM, uma estimativa para a temperatura do gás intragrupo de kT = 2,6 keV, que é tipica de sistemas com dispersões de velocidade de ~ 600 km s-1, bem característica de grupos. Essas contradições aparentes entre lentes fracas e raios X podem ser explicadas de dois modos: i) a massa obtida por lentes estaria sobreestimada devido à superposição de estruturas massivas ao longo da linha de visada ou ii) a temperatura do gás do meio intra-grupo reflete o potencial gravitacional de estruturas menores que estariam se fundindo para formar uma

  9. Trazando el mapa genético de NGC 1316 a través de su sistema de cúmulos globulares

    NASA Astrophysics Data System (ADS)

    Sesto, L. A.; Faifer, F. R.; Forte, J. C.

    2015-08-01

    The giant early-type galaxy NGC 1316 (Fornax A) is an intermediate-age merger remnant (-- yrs), in which an unusual pattern of dust, formed by large filaments and dark structures, demands special attention. This galaxy belongs to Fornax, one of the closest and most studied galaxy clusters of the southern hemisphere. The dust structures pose an interesting challenge for photometry in the central regions. Based on the idea that Globular Clusters systems (GCS) constitute genuine tracers of the formation and evolution of galaxies that contain them, we present a multicolor photometric study of globular clusters candidates (GC) associated with NGC 1316. We performed the reduction and analysis of a mosaic of gri images obtained with the Gemini Multi-object Spectrograph (GMOS) camera, mounted on the Gemini South telescope. These GMOS data were combined with BVIgz photometry from the HST Advanced Camera for Surveys (ACS) as well as with published Washington photometry, and used to define a multicolor grid. This grid will be used to attempt to identify the properties of the different subpopulations of CG present in NGC 1316.

  10. Código para imageamento indireto de estrelas em sistemas binarios: simulação de variações elipsoidais e do perfil das linhas

    NASA Astrophysics Data System (ADS)

    Souza, T. R.; Baptista, R.

    2003-08-01

    As estrelas secundárias em variáveis cataclí smicas (VCs) e binárias-x de baixa massa (BXBMs) são cruciais para o entendimento da origem, evolução e comportamento destas binárias interagentes. Elas são estrelas magneticamente ativas submetidas a condições ambientais extremas [e.g., estão muito próximas de uma fonte quente e irradiante; têm rotação extremamente rápida e forma distorcida; estão perdendo massa a taxas de 10-8-10-10 M¤/ano] que contribuem para que suas propriedades sejam distintas das de estrelas de mesma massa na seqüência principal. Por outro lado, o padrão de irradiação na face da secundária fornece informação sobre a geometria das estruturas de acréscimo em torno da estrela primária. Assim, a obtenção de imagens da superfície destas estrelas é de grande interesse astrofísico. A Tomografia Roche usa as variações no perfil das linhas de emissão/absorção da estrela secundária em função da fase orbital para mapear a distribuição de brilho em sua superfície. Neste trabalho apresentamos os resultados iniciais do desenvolvimento de um programa para o mapeamento da distribuição de brilho na superfí cie das estrelas secundárias em VCs e BXBMs com técnicas de astro-tomografia. Presentemente temos em operação um código que simula as variações no perfil das linhas em conseqüência de efeito Doppler resultante da combinação de rotação e translação de uma estrela em forma de lobo de Roche em torno do centro de massa da binária, em função da distribuição de brilho na superfície desta estrela. O código igualmente produz a curva de luz resultante das variações de aspecto da estrela em função da fase orbital (variações elipsoidais).

  11. Sistemas Eólicos Pequeños para Generación de Electricidad: Una guia para consumidores en Nuevo México

    SciTech Connect

    Not Available

    2005-10-01

    This Spanish version of the popular Small Wind Electric Systems: A New Mexico Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a system to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.

  12. Distribuciones Espectrales de Energía de las compañeras visibles en sistemas binarios que albergan agujeros negros de masas estelares

    NASA Astrophysics Data System (ADS)

    Cúneo, V. A.; Gómez, M. N.

    Stellar mass black holes are mainly detected in binary systems; where the compact object accretes material from its visible compa-nion. With the objective of characterizing visible companions; we analyse the Spectral Energy Distributions (SEDs) of a sample of these objects; selected from a galactic stellar black holes catalogue built by the authors. Using the VOSA SED Analyzer; we obtained; from several catalogues; the fluxes to construct the SEDs. A black body for a single star was adjusted for every observed SED. The excesses found between these distributions are attributed to the presence of the compact object. FULL TEXT IN SPANISH

  13. [Rethinking how health is promoted in the Colombian general health-related social security system (Sistema General de Seguridad Social en Salud)].

    PubMed

    Eslava-Castañeda, Juan C

    2006-12-01

    This article takes stock of how promoting health (PH) (promoción de la salud - PS) has been understood within an international setting and gives three meanings for promotion: as general policy orientation, as a set of actions and as a special dimension of sanitary work. Interest expressed in giving it a specific basis distinguishing it from prevention, transcending educational work, has emerged from the subtle differences established from such different ways of coming to terms with PH. After recognising the challenge posed by PH in the field of health, the text succinctly describes how discourse regarding PH has been introduced in Colombia and discusses how an attempt has been made to be more precise regarding its place in the general health-related social security system. Efforts currently being made in Colombia regarding making PH become a reality within the Colombian health system are then mentioned. PMID:17361582

  14. Work-related mental disorders and their inclusion in health policies in the Brazilian Unified Health System (Sistema Único de Saúde).

    PubMed

    Cocchiola-Silva, Rafaela A

    2016-03-01

    This study discusses the inclusion of mental disorders as work-related diseases in occupational health policies in Brazil. Mental disorders first appeared as a group of occupational diseases in 1999. Establishing mental disorders as occupational diseases was a result of the confluence of several factors: a broader notion of health, a positive shift in public perception regarding preconceived judgements relating to mental disorders and the improvement in the process that defines social security benefit entitlements due to the implementation of a new methodology in 2007. PMID:26987833

  15. El humanismo y la educacion en diversos niveles del sistema educativo national (Humanism and Education at Different Levels of the National Education System).

    ERIC Educational Resources Information Center

    Consejo Nacional Tecnico de la Educacion (Mexico).

    This document is an English-language abstract (approximately 1,500 words) of six studies of the different levels of education and the humanistic content of the teaching program at each level. On the preschool level, it is stated that kindergarten education in Mexico attempts to put the small child in contact with the world that surrounds him.…

  16. Tracking and Treating Mobile Populations. The TB Net System. Migrant Clinicians Network Monograph Series. = El Sistema de Red para la TB.

    ERIC Educational Resources Information Center

    Migrant Clinicians Network, Inc., Austin, TX.

    A comprehensive tracking and referral network that helps provide continuity of care for mobile populations with active tuberculosis (TB) or TB infection is considered essential for effective treatment of TB. However, the interstate referral system that exists between state health departments has been highly inefficient for serving migrant…

  17. A Handbook for Title I Migrant Parent Advisory Councils: Understanding the System=Un Folleto Para los Concilios de Padres Titulo I Migrante: Entendiendo el Sistema.

    ERIC Educational Resources Information Center

    Arredondo, C.; And Others

    A bilingual handbook for Title I migrant Parent Advisory Councils (PACs) was designed to be used by administrators, teachers, consultants and parents in organizing and training PACs at local, district, and state levels. All information is duplicated in separate English and Spanish sections. The first part discusses the Texas migrant program,…

  18. Sistema de Transferencia de Archivos para Estudiantes Migrantes: Un Mejor Entendimiento para Padres. (Migrant Student Record Transfer System: A Better Understanding for Parents).

    ERIC Educational Resources Information Center

    Jaramillo, Senaida I.

    When migrant children are enrolled in the Migrant Education Program, they are also enrolled in the Migrant Student Record Transfer System (MSRTS), a national system which accumulates educational and health information for each child on a computer located in Little Rock, Arkansas. The system affords teachers the opportunity to review the records,…

  19. Sistemas de Documentacion e Informacion Educativa en Belgica, Paises Bajos y Francia (Educational Documentation and Information Systems in Belgium, Holland, and France).

    ERIC Educational Resources Information Center

    Rossi Etchelouz, Nelly Yvis

    This booklet describes the working and organization of the information and documentation systems in Belgium, the Netherlands, and France. The discussion begins with a look at the Belgium educational system and how information services operate within that system. The central library, specialized services, and specialized information centers are all…

  20. El sistema fonologico del dialecto judeo-espanol de Bulgaria (The Phonological System of the Judeo-Spanish Dialect of Bulgaria)

    ERIC Educational Resources Information Center

    Kanchev, Ivan V.

    1974-01-01

    The phonetics and phonological system of the Bulgarian Judeo-Spanish dialect is discussed, showing its similarities to and borrowings from modern Spanish and Bulgarian. Treatment of phonemes is analyzed in detail. (Text is in Spanish.) (CK)

  1. Osnovi polojenia na reformata v obrasovatelnata sistema na Narodna republika Bulgaria (Basic Provisions of the Reform of the Public Education System in the People's Republic of Bulgaria).

    ERIC Educational Resources Information Center

    Bulgarian Communist Party, Sofia.

    This document is an English language abstract (approximately 1,500 words) of the reform provisions of the Bulgarian education system as formulated by the Bulgarian Communist Party in 1969. These reforms include the following items: access to compulsory secondary education for all; enrollment of all six-year olds; teachers to be specialized from…

  2. Predlog teza o razvoju i usavrsavanju sistema obrazovanja i vaspitanja u SFRJ (Proposals for the Development and Advancement of the System of Education in Yugoslavia).

    ERIC Educational Resources Information Center

    Federal Assembly of the Socialist Federal Republic of Yugoslavia, Belgrade,

    This document is an English-language abstract (approximately 1,500 words) of a draft setting out an education system for Yugoslavia to be considered by the Federal Assembly. The proposals are divided into six chapters: (1) current trends and developments in education; (2) socioeconomic foundations of educational development; (3) changes in the…

  3. Condições físicas do disco de acréscimo da nova-anã V4140 SGR

    NASA Astrophysics Data System (ADS)

    Borges, B.; Baptista, R.

    2003-08-01

    Discos de acréscimo são aparatos cósmicos que permitem que matéria seja eficientemente acrescida sobre uma fonte compacta pela remoção de momento angular via tensões viscosas enquanto transforma a energia potencial gravitacional em calor e, posteriormente, em radiação. Sistemas binários semi-ligados, como Variáveis Cataclísmicas (VCs) não-magnéticas, são talvez os melhores ambientes encontrados para o estudo da física desses discos de acréscimo. O desenvolvimento de técnicas de imageamento indireto, como o mapeamento por eclipses (MME) e a tomografia Doppler, permitiu avanços importantes na compreensão da física dos processos de acréscimo desses sistemas. V4140 Sagitarii é uma VC eclipsante de curto período orbital (~ 90 min) que não havia sido classificada como nova-anã ou polar. Neste trabalho apresentamos a análise do mapeamento por eclipse feito com dados de fotometria CCD nas bandas B, V e R de V4140 Sgr realizada no LNA. O objeto foi observado no declínio de erupção em julho de 1992 e em erupção em julho de 2001, isso indicou a classificação do sistema como uma nova-anã. A análise, feita sobre os mapas já apresentados em trabalho anterior, apresenta (i) diagrama cor-cor, que indica uma emissão opticamente espessa nas partes internas do disco em quiescência (R < RL1); (ii) diagrama cor-magnitude, usado para inferir uma distância de 600 +/- 10 pc ao sistema; (iii) a distribuição radial de temperatura observada que concorda com a lei de disco espesso em estado estacionário TµR-3/4, com temperaturas em torno de 10000 K e 3000 K ns partes internas e externas do disco em quiescência, respectivamente; (iv) a evolução da distribuição de temperatura no declínio de erupção; (v) estimativa da transferência de massa de 109.9+/-0.1 M¤/ano em quiescência, similar àquelas observadas em novas-like. O sistema é comparado à outras novas-anãs (e.g. OY Car e Z Cha) em quiescência e erupção, mostrando-se tratar um

  4. Aquisição fonológica do português brasileiro por crianças ouvintes bilíngues bimodais e surdas usuárias de implante coclear

    PubMed Central

    Cruz, Carina Rebello; Finger, Ingrid

    2014-01-01

    Resumo O presente estudo investiga a aquisição fonológica do Português Brasileiro (PB) por 24 crianças ouvintes bilíngues bimodais, com acesso irrestrito à Língua Brasileira de Sinais (Libras), e por 6 crianças surdas que utilizam implante coclear (IC), com acesso restrito ou irrestrito à Libras. Para a avaliação do sistema fonológico das crianças em PB, foi utilizada a Parte A, Prova de Nomeação, do ABFW – Teste de Linguagem Infantil (ANDRADE et al. 2004). Os resultados revelaram que as crianças ouvintes bilíngues bimodais e a criança surda usuária de IC com acesso irrestrito à Libras apresentaram processo de aquisição fonológica esperada (normal) para a sua faixa etária. Considera-se que a aquisição precoce e o acesso irrestrito à Libras podem ter sido determinantes para o desempenho dessas crianças no teste oral utilizado. PMID:25506105

  5. Les mammiferes aquatiques: lexique anglais-francais des mammiferes marins actuels ou recemment disparus, y compris les especes d'eau douce des groupes surtout marins (Aquatic Mammals: English-French Glossary of Livinq or Recently Extinct Marine Mammals, Including the Fresh Water Species of Prevalently Marine Groups).

    ERIC Educational Resources Information Center

    Nekrassoff, Vladimir N.

    1980-01-01

    Introduces a new glossary of aquatic mammals representing recent taxonomic revisions. Describes its design, which consists of the glossary proper, listing the scientific name of each entry followed by its English and French equivalents, and of two indexes, listing other common names for the same entries referred back to the scientific term. (MES)

  6. L'observation populaire de la chute des météorites (Deux enquêtes publiques sur des chutes de météorites ou La population face à des phénomènes célestes).

    NASA Astrophysics Data System (ADS)

    Florsch, A.

    The fall of meteorites are among the most impressive celestial events for the general public. Two inquiries were hold at Strasbourg in 1955 and 1977 about two falls in order to determine the physical properties of the corresponding meteorites. The author gives some informations about the responses in function of diverse parameters like age, sexe etc. and gives copies of some typical letters. The fact that questionnaires were proposed in the newspapers makes the responses less spontaneous.

  7. "Les Gosses, Ca Se Leve Tot Le Matin": L'Interpretation Generique du Syntagme Nominal Disloque au Moyen de Ce ou Ca (The Kids, Who Rise So Early in the Morning: The Generic Interpretation of the Dislocation of Noun Syntax by Means of the Pronouns "This" or "That").

    ERIC Educational Resources Information Center

    Carlier, Anne

    1996-01-01

    Discusses the grammatical effect of inserting the pronouns, "ce" and "ca" in the position originally occupied by the subject noun. Suggests that this insertion can alter the interpretation of the syntax of the subject noun and explains this problem by discussing the inherent properties of pronouns and the properties resulting from their insertion…

  8. L'identite ethnolinguistique et les eleves 16 ans ou plus qui frequentent les ecoles secondaires de langue francaise de l'Ontario. Rapport de recherche (The Ethno-Linguistic Identity of Students Aged 16 Years or Older Attending French-Language Secondary Schools in Ontario. Research Report).

    ERIC Educational Resources Information Center

    Duquette, Georges

    The report, written in French, presents the results of a study on the ethno-linguistic identity of students aged 16 years or older attending French language secondary schools in Ontario. Goals of the questionnaire study included the following: (1) gathering demographics on students about to graduate from high school, regarding their gender,…

  9. Elaboration d'une typologie des activities de simulation d'echanges interpersonnels en pedagogie des langues secondes ou etrangeres (Elaboration of a Typology of Interpersonal Interaction Simulation Activities for Second or Foreign Language Instruction). Tomes 1 and 2. Publications B-210 and B-211.

    ERIC Educational Resources Information Center

    Perez, Marcel

    A typology of role-playing and simulation exercises based on interpersonal interactions, used in second language instruction, is presented. Ten dimensions of such simulations were identified, which can then be used as criteria for classifying the exercises. The dimensions include: the starting point of the simulation; complexity of the…

  10. Reply to Comment on "The Jurassic-Cretaceous basaltic magmatism of the Oued El-Abid syncline (High Atlas, Morocco): Physical volcanology, geochemistry and geodynamic implications" by André Michard et al. (2013) [J. Afr. Earth Sci. 88 (December) (2013) 101-105

    NASA Astrophysics Data System (ADS)

    Bensalah, Mohamed Khalil; Youbi, Nasrrddine; Mata, João; Madeira, José; Martins, Línia; Font, Eric; Medina, Fida; Marzoli, Andrea; Hachimi, Hind El; Bertrand, Hervé; Bellieni, Giuliano; Doblas, Miguel; Mahmoudi, Abdelkader; Beraâouz, El Hassane; Miranda, Rui; Verati, Chrystèle; Min, Angelo De; Abbou, Mohamed Ben; Zayane, Rachid

    2016-06-01

    We welcome the comment by Michard et al. (2013) as it gives us the opportunity to better discuss the Jurassic-Cretaceous magmatism of the High Atlas (Morocco). In their comment, Michard et al. (2013) focus on three main points which are: (i) the age of the basalts from Naour, (ii) the structural history of the Central High Atlas and (iii) the geodynamic significance of the related Jurassic-Cretaceous magmatism. We will address these questions in the following sections.