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Sample records for negatrons spectra espectros

  1. BETA SPECTRA. I. Negatrons spectra; ESPECTROS BETA. I. Espectros simples de negatrones

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    Grau Malonda, A.; Garcia-Torano, E.

    1978-07-01

    Using the Fermi theory of beta decay, the beta spectra for 62 negatrons emitters have been computed introducing a correction factor for unique forbidden transitions. These spectra are plotted vs. energy, once normal i sed, and tabulated with the related Fermi functions. The average and median energies are calculated. (Author)

  2. Ballistic negatron battery

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    Prasad, M.S.R. [Koneru Lakshmiah Univ.. Dept. of Electrical and Electronics Engineering, Green fields, Vaddeswaram (India)

    2012-07-01

    If we consider the Statistics there is drastic increase in dependence of batteries from year to year, due to necessity of power storage equipment at homes, power generating off grid and on grid Wind, PV systems, etc.. Where wind power is leading in renewable sector, there is a need to look at its development. Considering the scenario in India, most of the wind resource areas are far away from grid and the remaining areas which are near to grid are of low wind currents which is of no use connecting these equipment directly to grid. So, there is a need for a power storage utility to be integrated, such as the BNB (Ballistic Negatron Battery). In this situation a country like India need a battery which should be reliable, cheap and which can be industrialized. So this paper presents the concept of working, design, operation, adaptability of a Ballistic Negatron Battery. Unlike present batteries with low energy density, huge size, more weight, more charging time and low resistant to wear level, this Ballistic Negatron Battery comes with, 1) High energy storage capability (many multiples more than the present most advanced battery). 2) Very compact in size. 3) Almost negligible in weight compared to present batteries. 4) Charges with in very less time. 5) Never exhibits a wear level greater than zero. Seems like inconceivable but adoptable with simple physics. This paper will explains in detail the principle, model, design, construction and practical considerations considered in making this battery. (Author)

  3. Reconstruction of neutron spectra through neural networks; Reconstruccion de espectros de neutrones mediante redes neuronales

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    Vega C, H.R.; Hernandez D, V.M.; Manzanares A, E. [Cuerpo Academico de Radiobiologia, Estudios Nucleares, Universidad Autonoma de Zacatecas, A.P. 336, 98000 Zacatecas (Mexico)] e-mail: rvega@cantera.reduaz.mx [and others

    2003-07-01

    A neural network has been used to reconstruct the neutron spectra starting from the counting rates of the detectors of the Bonner sphere spectrophotometric system. A group of 56 neutron spectra was selected to calculate the counting rates that would produce in a Bonner sphere system, with these data and the spectra it was trained the neural network. To prove the performance of the net, 12 spectra were used, 6 were taken of the group used for the training, 3 were obtained of mathematical functions and those other 3 correspond to real spectra. When comparing the original spectra of those reconstructed by the net we find that our net has a poor performance when reconstructing monoenergetic spectra, this attributes it to those characteristic of the spectra used for the training of the neural network, however for the other groups of spectra the results of the net are appropriate with the prospective ones. (Author)

  4. X-ray spectra for mamography; Espectros de rayos X para mamografia

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    Vega C, H.R.; Manzanares A, E.; Ramirez G, J.; Hernandez V, R.; Hernandez D, V.M.; Salas L, M.A. [UAZ, A.P. 336, 98000 Zacatecas (Mexico)]. e-mail: fermineutron@yahoo.com

    2008-07-01

    By means of Monte Carlo methods the X-ray spectra that produce Mammography equipment have been obtained. The mammographs are widely used with the purpose of diagnosing the cancer of the mammary glands. Different makers and mammographs models are distinguished by the voltage capacity and the current, exist as well as in the target type and filter. The targets that are used are Mo, Rh and W and the filters are Mo, Rh, Al and Be. In this work the results obtained by means of the MCNP code of the X-ray spectra take place when an electron beam of 28 keV is made impact on Mo, Rh and W targets, as well as the spectra that result of filtering these X rays using different types of filters. The resulting spectra contain the continuous spectrum of the stopping radiation, as well as the X rays characteristic of the used target. The utility of estimating the spectra of X rays by means of Monte Carlo is that it can use to estimate the absorbed dose by the gland, as well as the absorbed dose by other organs. It also allows to calculate the detector response. (Author)

  5. Graphics of diffraction spectra for PC; Graficado de espectros de difraccion para microcomputadora PC

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    Macias B, L.R

    1991-09-15

    The materials can be studied by means of diffraction if these are crystalline; of the type of study will depend the technique to apply, the first step is the obtaining of a digital register that allows to build the corresponding spectra. The digital register should have well-known the initial and final angular data. The main objective of this work, is starting of a digital register of data or an arrangement CPSi type (counts per second measured by the detection system) generated by means of the diffractometer, to create the graph of the corresponding spectra in visual form in the screen of a microcomputer and if is required, to obtain the graph in printed form by means of the same computer program for microcomputer. (Author)

  6. Thermal spectra of the TRIGA Mark III reactor; El espectro termico del reactor TRIGA Mark III

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    Macias B, L.R.; Palacios G, J. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    1998-07-01

    The diffraction phenomenon is gave in observance of the well known Bragg law in crystalline materials and this can be performance by mean of X-rays, electrons and neutrons among others, which allows to do inside the field of each one of these techniques the obtaining of measurements focussed at each one of them. For the present work, it will be mentioned only the referring to X-ray and neutron techniques. The X-ray diffraction due to its properties just it does measurements which are known in general as superficial measurements of the sample material but for the properties of the neutrons, this diffraction it explores in volumetric form the sample material. Since the neutron diffraction process depends lots of its intensity, then it is important to know the neutron source spectra that in this case is supplied by the TRIGA Mark III reactor. Within of diffraction techniques a great number of them can be found, however some of the traditional will be mentioned such as the identification of crystalline samples, phases identification and the textures measurement. At present this last technique is founded on the dot of a minimum error and the technique of phases identification performs but not compete with that which is obtained by mean of X-rays due to this last one has a major resolution. (Author)

  7. Indirect measurements of X-ray spectra; Mediciones indirectas de espectros de rayos X

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    Mainardi, R.T. [Facultad de Matematica, Astronomia y Fisica, Universidad Nacional de Cordoba, X5000HUA Cordoba (Argentina)

    2006-07-01

    To the effects of measuring the spectral distribution of the radiation emitted by the x-ray tubes and electron accelerators, numerous procedures that are grouped in two big categories exist at the present time: direct and indirect methods. The first ones use high resolution detectors that should be positioned, together with the appropriate collimator, in the direction of the x ray beam. The user should be an expert in the use and correction of the obtained data by the different effects that affect the detector operation such as efficiency and resolution in terms of the energy of the detected radiation. The indirect procedures, although its are more simple to use, its also require a considerable space along the beam to position the ionization chamber and the necessary absorbents to construct by this way the denominated attenuation curve. We will analyze the operation principle of the indirect methods and a new proposal in which such important novelties are introduced as the beam dispersion to avoid to measure along the main beam and that of determination of the attenuation curve in simultaneous form. By this way, with a single shot of the tube, the attenuation curve is measured, being necessary at most a shot of additional calibration to know the relative response of the detectors used in the experimental array. The physical processes involved in the obtaining of an attenuation curve are very well well-known and this it finishes it can be theoretically calculated if the analytic form of the spectrum is supposed well-known. Finally, we will see a spectra reconstruction example with the Kramers parametric form and comparisons with numeric simulations carried out with broadly validated programs as well as the possibility of the use of solid state dosemeters in the obtention of the attenuation curve. (Author)

  8. ESPECTROS INFRAVERMELHOS DA CREATINA

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    Kumiko K. Sakane

    2011-08-01

    Full Text Available São apresentados espectros infravermelhos da creatina, na faixa de 4000 a 400 cm−1. Os resultados são comparados com espectros observados e calculados, publicados na literatura.

  9. Gamma spectra pictures using a digital plotter. Program MONO; Representacion de Espectros directos mediante un trazado digital. Prograa MONO

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    Los Arcos, J. M.

    1978-07-01

    The program MONO has been written for a CALCOMP-936 digital plotter operating off- -line with a UMI VAC 1106 computer, to obtain graphic representations of single gamma spectra stored on magnetic tape. It allows to plot the whole spectrum or only a part, as well as to draw a given spectrum on the same or different picture than the previous one. Ten representation scales are available and at up nine comment lines can be written in a graphic. (Author) 4 refs.

  10. Indirect measure of X-rays spectra using TLDs; Medicion indirecta de espectros de rayos X utilizando TLDs

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    Bonzi, E. V.; Mainardi, R. T. [Universidad Nacional de Cordoba, Facultad de Matematica, Astronomia y Fisica, Av. Haya de la Torre y Av. Medina Allende s/n, Ciudad Universitaria, X5016LEA Cordoba (Argentina)

    2011-10-15

    A methodology of indirect measure of X-rays spectra, emitted by conventional tubes, was developed recently and its feasibility verified in the first place by Monte Carlo simulations. For that case is intended to measure, by means of plastic scintillators, attenuation curves of dispersed beams previously. In this work were carried out measurements of attenuation curves with thermoluminescent dosimeters (TLD) to verify the kindness of the indirect measure method. The attenuation curve was also measured using an ionization chamber brand Capintec (model 192) with the purpose of making a comparison. The results of the attenuation curve measured with both dosimeters present a good resolution inside the statistical fluctuations and the spectral reconstruction using diverse parametric functions is carried out in a quick and simple way with excellent resolutions in the functional form. For this reconstruction method are of fundamental importance the following properties of the used dosimeter: in the first place the repetition of the measures, property that could check; in second place the precision of the measured data and lastly the dosimeter response, this is, the increase of the thermoluminescent signal before an increase of the photons flow of X-rays. This parameter is the gradient of the curve thermoluminescent signal versus the dose imparted to the dosimeter. The measures were realized with a generator of X-rays brand Kevex provided of a conventional tube with tungsten anti cathode that polarizes with high tension to a maximum value of 50 kV and current of 0.5 ma. (Author)

  11. Diagnóstico de Fallas en Máquinas Eléctricas Rotatorias Utilizando la Técnica de Espectros de Frecuencia de Bandas Laterales Fault Diagnosis in Rotating Electrical Machines by Side Bands Frequency Spectra Technique

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    Roberto Flores

    2011-01-01

    Full Text Available En el presente trabajo se muestra y se aplica una metodología para el diagnóstico de fallas en máquinas eléctricas rotatorias utilizando la técnica de espectros de frecuencia de bandas laterales de las corrientes de fase. Se establecen sistemas de prueba de laboratorio para verificar las magnitudes de las bandas originadas por fallas tanto mecánicas como eléctricas. Se muestra una serie de resultados para un grupo motor de corriente directa-generador síncrono de 5 kVA desalineado y de dos motores de inducción de 5 HP tipo jaula de ardilla, uno con holgura en soporte de baleros y otro con barras rotas. Además, se comparan los resultados de los espectros empleando un sensor de corriente convencional contra una bobina de Rogowski, obteniendo resultados adecuados para detectar la presencia de falla en las máquinas.In this article a methodology to diagnose faults in rotating electrical machines is presented. The method uses spectral frequency analysis of the phase currents sidebands. Online systems to verify the magnitude of these frequencies, caused not only by mechanical faults but also electrical faults, are presented. The results of a faulty set formed by a direct current motor plus a synchronous generator of 5 kVA and two squirrel-cage induction motors of 5 HP, one with slacked bearings faults and other with broken rotor bars, are presented. Also, the results of the spectra using a conventional current sensor are compared with those of a Rogowski coil, showing that the results of both sensors are suitable to detect machine faults.

  12. Espectros biológicos florísticos de Campos Rupestres de afloramento e Campos Úmidos diferem entre si e em relação ao Espectro Biológico Normal de Raunkiaer. Floristic biological spectra of Rock outcrops and Wet grasslands differ between themselves and in relation to the Raunkiaer’s Normal Biological Spectrum.

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    Natalia de Oliveira COSTA

    2012-12-01

    Full Text Available A distribuição de frequência de classes de formas de vida em uma flora, conhecida como espectro biológico florístico, varia em função das condições climáticas e edáficas em que as plantas se desenvolvem. Neste trabalho comparamos os espectros biológicos médios (n = 3 de equivalentes a Campo Rupestre de afloramento e a Campo Úmido no Estado de São Paulo na expectativa de encontrar diferenças significativas entre os dois tipos de comunidade. Os Campos Rupestres (G-corrigido = 23,41; p-valor = 0,0001 e os Campos Úmidos (G-corrigido = 80,34; p < 0,0001 diferiram do Espectro Biológico Normal de Raunkiaer, bem como diferenciaram-se entre si (χ2 = 24,23; p < 0,0001. Uma Análise de Correspondência Distendida separou Campos Rupestres de Campos Úmidos devido às maiores frequências de fanerófitos nos primeiros e de hemicriptófitos e terófitos nos últimos. Sugerimos como hipóteses que os micro-habitats favoráveis ao desenvolvimentode fanerófitos sejam mais comuns nos Campos Rupestres de afloramento do que nos Campos Úmidos, ocorrendo o contrário com os micro-habitats favoráveis aos hemicriptófitos. Esta forma de vida pode apresentar melhor ajustamento ao encharcamento do solo do que os caméfitos e geófitos. A estratégia de escape apresentada pelos terófitos seria pouco eficiente em Campos Rupestres de afloramento devido à escassez de solo para proteção das sementes. The frequency distribution of life forms in a flora, called floristic biological spectrum, varies according to the climatic and edaphic conditions under which plants grow. In this work we compared the average (n = 3 biological spectra of Rock outcrop and Wet grassland like communities in São Paulo state expecting to find significant differences between the two community types. Rock outcrops (G-corrected = 23.41; p-value = 0.0001 and Wet grasslands (G-corrected = 80.34; p < 0.0001 differed from the Raunkiaer’s Normal Biological Spectrum, as did between

  13. DELIN and DELOG codes for graphic representation of gamma ray spectra; Programas DELIN y DELOG para la representacion grafica de espectros gamma

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    Romero, L.; Travesi, A.

    1983-07-01

    Two Fortran IV Codes has been developed for graphic representation of the gamma-ray spectra obtained with Ge Li detectors and multichannel analyzers. The grafic plotting es carried out with the H.P. Graphic Plotter Mod HP-7221 A, using the graphic package software GRAPHICS-1000 from Hewlett-Packard. The codes have a great versatility and the representation of gamma spectra can ba done in a lineal, semi log, or log-log scale, as desired. The gamma ray spectra data are feed into the computer through magnetic tape or perfored paper tape. The different out-put options and complementary data are given in a conversational way through a terminal with T.V. displays. Among the options that can be selected by the user are the following: - smoothing the spectra - drawing the spectra point by point or continuous - out-put drawing an 1, 2, or 4 sheet with automatic division of the energy scale. - overlapping of selected spectra regions in Y scale ampliation with automatic print-out of the region limits and ampliation factor. - Printing spectra data and identifications of selected photo peaks. The codes can be employed with any computer using printing devices, HP-Graphics 1000 software compatible, but are easily modified for another printing software since their modular structure with Fortran IV written.

  14. Determination of the fast neutrons spectra by the Elastic scattering method (n, p); Determinacion del espectro de neutrones rapidos por el metodo de la dispersion elastica (n, p)

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    Elizalde D, J

    1973-07-01

    This work consists in determining the fast neutron spectra emitted by a Pu-Be isotopic source. The implemented technique is based in the spectrometry (n, p). This consists in making to fall on a fast neutrons beams (polyenergetic) over a thin film of hydrogenated material, detecting the spectra of emitted protons at a fix angle. The polyethylene film and the used solid state detector are inside of a vacuum chamber. The detector is placed at 30 degree with respect to direction of the incident neutrons beam. The protons spectra is stored in a multichannel. the energy is obtained with the prior calibration of the system. The data processing involves the transformation of the protons spectra observed at the falling on neutrons spectra over the film. The energy of the neutrons is related with that of the protons, according to the collision kinematical equations. The cross section of elastic collision of the neutrons with the hydrogen atoms is obtained from literature. Applying these relations to the observed spectra it is obtained the falling on neutron spectra over the film. (Author)

  15. Automatic storing of single gamma spectra on magnetic tape. Programs LONGO, DIRE; Automatizacion del almacenamiento en cinta magnetica de espectros gamma directos. Programas LONGO, DIRE

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    Los Arcos Merino, J. M.

    1978-07-01

    The program LONGO provides the block size and the block number in a binary file on magnetic tape. It has been applied to analyse the structure of the nine-track magnetic tapes storing single or coincidence gamma spectra files, recorded in octet form by a MULTI-8 minicomputer in the Nuclear Spectrometry Laboratory of J.E.N. Then the program DIRE has been written to transform the single gamma spectra into a new FASTRAND disk file, storing the information in-36 bit words. A copy of this file is obtained on magnetic tape and the single gamma spectra are then available by standard FORTRAN V reading sentences. (Author) 3 refs.

  16. Program LEP to addition of gamma spectra from germanium detectors; Programa LEPS para suma de espectros gammas de detectores de germanio

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    Romero, L.

    1986-07-01

    The LEP program, written in FORTRAN IV, performs the addition of two spectra, collected with different detectors, from the same sample. This application, adds the two gamma spectra obtained from two opposite LEPS Germanium Detectors (Low Energy Photon Spectrometer), correcting the differences (channel/energy) between both two spectra, and fitting them before adding. The total-spectrum is recorded at the computer memory as a single spectrum. The necessary equipment, to run this program is: - Two opposite germanium detectors, with their associate electronics. - Multichannel analyzer (2048 memory channel minimum) - Computer on-line interfacing to multichannel analyzer. (Author) 4 refs.

  17. Program LEP to addition of gamma spectra from germanium detectors; Programa LEPS para suma de espectros gammas de detectores de germanio

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    Romero, L.

    1986-07-01

    The LEP program, written in FORTRAN IV, performs the addition of two spectra, collected with different detectors, from the same sample. This application, adds the two gamma spectra obtained from two opposite LEPS Germanium Detectors (Low Energy Photon Spectrometer), correcting the differences (channel/energy) between both two spectra, and fitting them before adding. The total-spectrum is recorded at the computer memory as a single spectrum. The necessary equipment, to run this program is: - Two opposite germanium detectors, with their associate electronics. - Multichannel analyzer (2048 memory channel minimum) - Computer on-line interfacing to multichannel analyzer. (Author) 4 refs.

  18. Application of Wavelets and Quaternions to NIR Spectra Classification; Aplicacion de las Wavelests y los Cuaterniones a la Clasificaciond e Espectros NIR

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    Barcala Riveira, J. M.; Fernandez Marron, J. L.; Alberdi Primicia, J.; Navarrete Marin, J. J.; Oller Gonzalez, J.C.

    2003-07-01

    This document describes how multi resolution analysis can combine with the use of quaternions to identify near infrared spectra. The method is applied to spectra of plastics usually present in domestic wastes. First, Haar wavelet is applied to spectrum. With the coefficients obtained, a quaternion is built. We named this quaternion a characteristic quaternion. Distances to characteristic quaternions are used to classify new quaternions. (Author) 54 refs.

  19. Mathematical treatment of digitalized spectra of the neutron diffractometer for microcomputer; Tratamiento matematico de espectros digitalizados del difractometro de neutrones para microcomputadora

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    Macias B, L.R

    1991-06-15

    For the study of materials by means of diffraction, it is required in the first place that the sample is a crystalline material so that the diffraction is possible and the digitized spectra of corresponding diffraction can be generated. This spectra, for any type of study consists of a great number of readings (counting or counts per second Cps) that of some way are related to a determined angle to be able to reproduce a diagram that will be evaluated to conclude the study according to it is. Since the evaluation will depend on the angular readings that are carried out in the mentioned spectra, it is required of a good definition of the curves for its angular reading. Well-known the problem of the no enough definition of the spectra to be able to carry out the angular reading, it was proceeds to outline a possible solution which consists on making a mathematical treatment to the spectra with the purpose of being able to define the angular positions of interest and to correct some operation factors that appear in the spectra. (Author)

  20. Determination of interplanar distances starting from diffraction spectra for PC microcomputer; Determinacion de distancias interplanares a partir de espectros de difraccion para microcomputadora PC

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    Macias B, L.R

    1991-07-15

    The objective of this work, consists in that starting of a digitized diffraction spectra result of the structural analysis technique, it is possible by means of the analysis of a computer program, to detect the diffraction peaks and well-known the wavelength to obtain the values of the interplanar distances to be compared with the JCPDS (Joint Committee on Powder Diffraction Standards). (Author)

  1. An approximated method of calculation of neutron spectra in reactor cells; Um metodo aproximado de calculo do espectro de neutrons em celulas de reatores

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    Caldeira, Alexandre D. [Centro Tecnico Aeroespacial (CTA-IEAv), Sao Jose dos Campos, SP (Brazil). Inst. de Estudos Avancados

    2000-07-01

    This work deals with the cell neutron spectra calculated with the transport equation for an infinite medium applied to the homogenized cell. Considering a radioisotope production reactor fuel cell, as a sample case, the maximum deviation found between the approximated and the S{sub N} methods was 13%. (author)

  2. Photons and photoneutrons spectra of a Linac of 15 MV; Espectros de fotones y fotoneutrones de un LINAC de 15 MV

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    Benites R, J. L.; Carrillo C, A. [Centro Estatal de Cancerologia de Nayarit, Av. Enfermeria, Fracc. Fray Junipero Serra, 63000 Tepic, Nayarit (Mexico); Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Calle Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico); Velazquez F, J. B., E-mail: jlbenitesr@prodigy.net.mx [Universidad Autonoma de Nayarit, Posgrado CBAP, Carretera Tepic Compostela Km. 9, Xalisco, Nayarit (Mexico)

    2011-10-15

    Using the Monte Carlo code MCNP-5, the photons and photoneutrons spectra generated in the head stock of the lineal accelerator (Linac) Varian of 15 MV of the Cancerology State of Nayarit were determined. For the calculations a heterogeneous head stock was modeled, more compatible with the work conditions. In the center of the head stock a tungsten target was located on a copper support, followed by the flattened filter. The photons and photoneutrons spectra were obtained accelerating electrons and making them collide against the target to produce photons by Bremsstrahlung, these photons were transported inside the head stock and the photons and photoneutrons spectra were calculated in a punctual detector located under the flattened filter and in the isocenter. The spectra were evaluated in punctual detectors that were located in the plane from the isocenter to the long of the X and Y axes each 20 cm, in an equidistant way, up to 2 m, so much in the longitudinal and transversal axes. In the calculations were used histories 5E(6) with the purpose of obtaining smaller uncertainties to 1%. It was found that the photons spectrum in the punctual detector inside the head stock presents a pick of 1.25 MeV in the energy interval of 0.5 and 1.5 MeV, later suffers a filtration and diminishes in asymptote form. This spectrum modifies when the beam reaches the isocenter, diminishing the low energy photons. Inside the head stock the photoneutrons spectrum shows a structure with two picks, one before 1 MeV and other after 1 MeV; this is for effect of the collimators geometry and the distance. Finally an increment of the total neutrons flow to 60 cm of distance of the isocenter on the Y axis was observed, due to the design geometry of the modeling heterogeneous head stock. (Author)

  3. Experimental study of the X-ray spectra optimization for computed radiography mammography systems; Investigacao experimental da otimizacao do espectro de raios X em sistemas de mamografia computadorizada

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    Tomal, Alessandra, E-mail: atomal@ifi.unicamp.br [Universidade Estadual de Campinas (UNICAMP), Campinas, SP (Brazil). Instituto de Fisica Gleb Wataghin; Cunha, Diego M. [Universidade Federal de Uberlandia (UFU), Uberlandia, MG (Brazil). Instituto de Fisica; Nogueira, Maria S. [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil); Gaspar, Fabio [Vigilancia Sanitaria, Campinas, SP (Brazil); Poletti, Martin E. [Universidade de Sao Paulo (USP), Ribeirao Preto, SP (Brazil). Faculdade de Filosofia, Ciencias e Letras. Departamento de Fisica

    2013-12-15

    Digital mammography is replacing screen-film mammography due to several advantages of digital receptors. The use of Computed Radiography (CR) mammography systems has been considered an alternative to achieve digital images with a low cost. Besides, the optimization of the X-ray spectrum, characterized by the anode/filter combination and tube potential, is an important step in order to improve the image quality with the lower dose to the breast. In this work, we investigated the optimal X-ray spectra using a figure of merit for two mammography equipment: Senographe DMR (General Electric Medical Systems) and Mammomat 3000 Nova (Siemens), both using an image plate Kodak EHR-M2 (Kodak DirectView). A PMMA phantom, simulating breast with thicknesses of 5 cm, was used. The anode/filter combinations evaluated were: Mo/Mo, Mo/Rh, Rh/Rh and Rh/Al for the Senographe system, and Mo/Mo, Mo/Rh, W/Rh for the Mammomat system, for all the intervals of tube potential range from 24 to 35 kVp. Results demonstrate that the higher values of FOM were achieved with the Rh/Rh at 29 kVp and Rh/Al at 26 kVp for the Senographe system, and for the W/Rh at 28 kVp in the Mammomat one. The reduction in the dose associated with the optimum spectra was 13 and 26% for the Senographe and Mammomat systems, respectively. Finally, our results suggest that anode/filter combinations of more energetic spectra than the standard Mo/Mo combination are recommended for thicker breast, in order to reduce the breast dose levels. (author)

  4. Neutron reference spectra measurements with the Bonner multi-spheres spectrometer; Medidas de espectros de referencia de neutrons com o espectrometro de multiesferas de Bonner

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    Lemos Junior, Roberto Mendonca de

    2004-07-01

    This paper aims to define a procedure to use the Bonner Multisphere Spectrometer with a {sup 6}LiI(Eu) detector in order to determine of neutron spectra. It was measured {sup 238}PuBe spectra and same of reference ({sup 241}AmBe, {sup 252}Cf e {sup 252}Cf+D{sub 2}O) published in ISO 8529-1 (2001) Norm. The data were processed by a computer program (BUNKI), which presents the results in neutrons energy fluency. Each input parameter of the program was studied in order to establish their influence in the adjustment result. The environment dose equivalent rate obtained placing the detector 1 m from the {sup 241}AmBe source was 122 {+-} 4 {mu}Sv/h with 7% of uncertainty and 95% of confidence level. The procedure established in this work was tested with the {sup 238}PuBe spectrum, obtaining an environment dose equivalent rate of 286 {+-} 9 {mu}Sv/h, 8% lower than the value measured experimentally used as reference. Through this procedure will be possible to measure neutron spectra in different work places where neutrons sources are used. Knowing these spectra, it will be possible to evaluate which area monitors, are more suitable, as well as, to study better the response of individual neutron monitors, as for instance, to obtain a conversion coefficient more appropriate to the albedo dosimeter used in different work places. As the measurements need a long time to be accomplished, the work optimization is fundamental to reduce the exposing time of the Bonner spectrometer operator. For this reason, an important parameter examined in this paper was the possibility of reducing the number of spheres used during the measurement without changing the final result. Considering the radiation protection standards, this parameter has a huge importance when the measurements are performed in work places where the neutron fluency and gamma rate offer risks to the operator's health, as for instance, in nuclear centrals. Studying this parameter, it was possible to conclude that

  5. Measurements of neutron streaming energy spectra in shielding ducts; Medidas e calculos de espectro de energia de neutrons emergentes de um duto em uma blindagem

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    Angioletto, Elcio; Abe, Alfredo Y. [Centro Tecnologico da Marinha em Sao Paulo (CTMSP), SP (Brazil). E-mail: angiolet@net.ipen.br; Coelho, Rogerio P. [Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

    2000-07-01

    This work presents the measurements of neutron streaming, for different energy ranges, in shielding ducts. The shielding is composed of plates of different materials (borate polyethylene and paraffin). The two ducts are conceived as labyrinths in order to (a three-legged duct) minimize the radiation streaming. A 37 GBq Americium-Beryllium neutron source type was used for the experimental measurements. The fast neutron energy spectra were measured using a detection system with a liquid organic scintillator, NE-213 detector, and appropriate electronic equipment. The results are in good agreement with the literature. The measurements of thermal neutrons intensity were performed with a BF{sub 3} counter. The MCNP-4B code was used to simulate the experiment. The simulation was performed with success, obtaining a small discrepancy (9.0%) between the calculated results and the measurements with the BF{sub 3} counter, at the duct third leg. From the results it was possible to observe the thermal neutron streaming through the duct, the effects of neutron flux moderation, the attenuation in the shielding and also the neutron energy spectra modifications emerging from the shielding. (author)

  6. Espectro Vibracional no Infravermelho Próximo dos Polímeros Poliestireno, Poli(Metacrilato de Metila e Policarbonato Near-Infrared Spectra of Polystyrene, Poly(Methyl Methacrylate and Polycarbonate

    Directory of Open Access Journals (Sweden)

    Sérgio C. de Araújo

    2001-01-01

    Full Text Available Os espectros no infravermelho próximo (NIR dos polímeros amorfos poliestireno (PS, poli(metacrilato de metila (PMMA e policarbonato (PC foram estudados. A tentativa de atribuição das bandas harmônicas e de combinação dos modos vibracionais do PS, PMMA e PC foi realizada baseando-se na teoria de modos locais e pelo uso do método matemático de ajuste de curvas. A correção de anarmonicidade e freqüência mecânica foi determinada em um gráfico de Birge-Sponer. Uma correção de anarmonicidade de 57 e 58 cm-1 foi obtida para os modos de estiramento dos grupos CH2 e CH do PS; 59 e 9 cm-1 para os modos de estiramento dos grupos CH3 e CO do PMMA e 53, 59 e 10 cm-1 para os modos de estiramento dos grupos CH, CH3 e CO do PC, respectivamente.The near-infrared (NIR spectra of the amorphous polymers polystyrene (PS, poly(methyl methacrylate (PMMA, and polycarbonate (PC have been studied. The tentative assignment of the overtone and combination frequencies is made using the curve fitting calculations and the local mode theory. Anharmonicity correction and mechanical frequency were determined from a Birge-Sponer plot. A tentative assignment of stretch overtone frequency of CH2 and CH functional groups of PS; CH3 and CO functional groups of PMMA and CH, CH3 and CO functional groups of PC has been made. An anharmonicity correction of 57 and 58 cm-1 was obtained for CH2 and CH stretch modes of PS; 59 and 9 cm-1 for CH3 and CO stretch modes of PMMA and 53, 59 and 10 cm-1 for CH, CH3 and CO stretch modes of PC, respectively.

  7. Diagnóstico de Fallas en Máquinas Eléctricas Rotatorias Utilizando la Técnica de Espectros de Frecuencia de Bandas Laterales Fault Diagnosis in Rotating Electrical Machines by Side Bands Frequency Spectra Technique

    OpenAIRE

    Roberto Flores; Tomás I Asiaín

    2011-01-01

    En el presente trabajo se muestra y se aplica una metodología para el diagnóstico de fallas en máquinas eléctricas rotatorias utilizando la técnica de espectros de frecuencia de bandas laterales de las corrientes de fase. Se establecen sistemas de prueba de laboratorio para verificar las magnitudes de las bandas originadas por fallas tanto mecánicas como eléctricas. Se muestra una serie de resultados para un grupo motor de corriente directa-generador síncrono de 5 kVA desalineado y de dos mot...

  8. Comparison of spectra for validation of Penelope code for the energy range used in mammography; Comparacao de espectros para validacao do codigo PENELOPE para faixa de energia usada em mamografia

    Energy Technology Data Exchange (ETDEWEB)

    Albuquerque, M.A.G.; Ferreira, N.M.P.D., E-mail: malbuqueque@hotmail.co [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil); Pires, E.; Ganizeu, M.D.; Almeida, C.E. de, E-mail: marianogd@uol.com.b [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil); Prizio, R.; Peixoto, J.G., E-mail: guilherm@ird.gov.b [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    The spectra simulated by the Penelope code were compared with the spectra experimentally obtained through the silicon PIN photodiode detector, and with spectra calculated by the code of IPEN, and the comparison exhibited a concordance of 93.3 %, and make them an option for study of X-ray spectroscopy in the voltage range used in mammography

  9. El espectro que soy yo

    Directory of Open Access Journals (Sweden)

    Carlos Araque Osorio

    2013-04-01

    Full Text Available “El espectro que soy yo” es una mirada incompleta de mi vida en la ciudad, la universidad y elarte, es decir, de un cúmulo de acontecimientos fraccionados que dicen muy poco de los sucesos,pero me permiten hacer un dibujo de lo que soy y seré. No podemos saber si lo que recordamoscomo cierto ocurrió tal como nos llegan las imágenes mentales. Hacemos versiones y estaspueden ser tergiversaciones. Cada vez que relatamos algo que nos pasó lo hacemos de maneradiferente, le agregamos o le quitamos. Los humanos tenemos la condición y la capacidad defabular con nuestra existencia. Si es imposible contar una historia enteramente veraz, no estámal regocijarnos con la posibilidad de que cada uno haga su propia adaptación de los hechos.

  10. Spectra and depth-dose deposition in a polymethylmethacrylate breast phantom obtained by experimental and Monte Carlo method; Espectros e deposicao de dose em profundidade em phantom de mama de polimetilmetacrilato: obtencao experimental e por metodo de Monte Carlo

    Energy Technology Data Exchange (ETDEWEB)

    David, Mariano G.; Pires, Evandro J.; Magalhaes, Luis A.; Almeida, Carlos E. de; Alves, Carlos F.E., E-mail: marianogd08@gmail.com [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil). Lab. Ciencias Radiologicas; Albuquerque, Marcos A. [Coordenacao dos Programas de Pos-Graduacao de Engenharia (COPPE/UFRJ), RJ (Brazil). Instituto Alberto Luiz Coimbra; Bernal, Mario A. [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Instituto de Fisica Gleb Wataghin; Peixoto, Jose G. [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2012-08-15

    This paper focuses on the obtainment, using experimental and Monte Carlo-simulated (MMC) methods, of the photon spectra at various depths and depth-dose deposition curves for x-rays beams used in mammography, obtained on a polymethylmethacrylate (PMMA) breast phantom. Spectra were obtained for 28 and 30 kV quality-beams and the corresponding average energy values (Emed) were calculated. For the experimental acquisition was used a Si-PIN photodiode spectrometer and for the MMC simulations the PENELOPE code was employed. The simulated and the experimental spectra show a very good agreement, which was corroborated by the low differences found between the Emed values. An increase in the Emed values and a strong attenuation of the beam through the depth of the PMMA phantom was also observed. (author)

  11. Method to analyze spectra and set alerts on environmental gamma spectrometry measurements in real time; Metodo para analizar espectros y establecer alertas tempranas en medidas de espectrometria gamma ambiental en tiempo real

    Energy Technology Data Exchange (ETDEWEB)

    Prieto, E.; Salvado, M.; Casanova, R.

    2013-07-01

    This work describes a method of analysis to extract information radiation from gamma spectra obtained during short time intervals. Therefore, method allows to carry out an analysis of data in real time, which in turn, ensures that an early warning system can be established. (Author)

  12. Reconstruction of neutron spectra using neural networks starting from the Bonner spheres spectrometric system; Reconstruccion de espectros de neutrones usando redes neuronales a partir del sistema espectrometrico de esferas de Bonner

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz R, J.M.; Martinez B, M.R.; Arteaga A, T.; Vega C, H.R.; Hernandez D, V.M.; Manzanares A, E. [Universidad Autonoma de Zacatecas, A.P. 336, 98000 Zacatecas (Mexico)

    2005-07-01

    The artificial neural networks (RN) have been used successfully to solve a wide variety of problems. However to determine an appropriate set of values of the structural parameters and of learning of these, it continues being even a difficult task. Contrary to previous works, here a set of neural networks is designed to reconstruct neutron spectra starting from the counting rates coming from the detectors of the Bonner spheres system, using a systematic and experimental strategy for the robust design of multilayer neural networks of the feed forward type of inverse propagation. The robust design is formulated as a design problem of Taguchi parameters. It was selected a set of 53 neutron spectra, compiled by the International Atomic Energy Agency, the counting rates were calculated that would take place in a Bonner spheres system, the set was arranged according to the wave form of those spectra. With these data and applying the Taguchi methodology to determine the best parameters of the network topology, it was trained and it proved the same one with the spectra. (Author)

  13. Spectra and absorbed dose by photo-neutrons in a solid water mannequin exposed to a Linac of 15 MV; Espectros y dosis absorbida por fotoneutrones en un maniqui de agua solida expuesta a una Linac de 15 MV

    Energy Technology Data Exchange (ETDEWEB)

    Benites R, J. [Centro Estatal de Cancerologia de Nayarit, Servicio de Seguridad Radiologica, Calz. de la Cruz 118 Sur, 63000 Tepic, Nayarit (Mexico); Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Apdo. Postal 336, 98000 Zacatecas (Mexico); Velazquez F, J., E-mail: jlbenitesr@prodigy.net.mx [Universidad Autonoma de Nayarit, Posgrado en Ciencias Biologico Agropecuarias, Carretera Tepic-Compostela Km 9, 63780 Jalisco-Nayarit (Mexico)

    2012-10-15

    Using Monte Carlo methods was modeled a solid water mannequin; according to the ICRU 44 (1989), Tissue substitutes in radiation dosimetry and measurements, of the International Commission on Radiation Units and Measurements; Report 44. This material Wt 1 is made of H (8.1%), C (67.2%), N (2.4%), O (19.9%), Cl (0.1%), Ca (2.3%) and its density is of 1.02 gr/cm{sup 3}. The mannequin was put instead of the patient, inside the treatment room and the spectra and absorbed dose were determined by photo-neutrons exposed to a Linac of 15 MV. (Author)

  14. Diagnóstico diferencial entre el espectro autista y el espectro esquizofrénico

    OpenAIRE

    Paula Pérez, Isabel, 1970-

    2012-01-01

    Introducción: La distinción nosológica entre espectro autista y espectro esquizofrénico está hoy en día claramente delimitada, a pesar de las evidencias científicas de la relación genética entre ambas condiciones. El solapamiento de síntomas negativos de la esquizofrenia con ciertas manifestaciones autistas y la atribución errónea de síntomas positivos de la esquizofrenia en el autismo por profesionales no familiarizados con los trastornos del espectro autista ponen de relieve la importancia ...

  15. Problems of interference and geometry of the detectors in a beam tube for the determination of the neutron spectra; Problemas de interferencia y geometria de los detectores en un tubo de haces para la determinacion del espectro de neutrones

    Energy Technology Data Exchange (ETDEWEB)

    Paredes G, L.C

    1991-11-15

    The detector materials were selected and proved for the thermal, intermediate and quick energy intervals of the neutron spectra, in the radial tube RW-2 to 1 MW of thermal power during 5 min, being obtained good results respect to the activation of the thin sheets. However, since the exhibition speed, of each experimental arrangement after it irradiation that was of the order of 2 R/h, it was considered that may be more convenient the irradiation, separated from each thin sheet, for that which it was selected the SINCA irradiation system, because it simplified the activities related with the individual irradiation of the thin sheets and the count of the same ones. It was found that the selection, the geometric arrangement and measurement of the activities of the used thin sheets, its are the three factors that more affect the input data of the SAND II code that it will be used in our case for the determination of the neutron spectra of the Reactor. (Author)

  16. El espectro de K2 Vol

    Science.gov (United States)

    Pintado, O. I.; Adelman, S. J.

    Se han obtenido espectros de alta dispersión para la estrella K2 Vol con el espectrógrafo REOSC del CASLEO en un rango de longitudes de ondas comprendido entre 3500 y 5050 Å. El espectro muestra evidencias de que la estrella es binaria. Se determinan las abundancias de los componentes químicos presentes en su atmósfera, como así también algunas características de su compañera.

  17. Design of an artificial neural network, with the topology oriented to the reconstruction of neutron spectra; Diseno de una red neuronal artificial, con la topologia orientada a la reconstruccion del espectro de neutrones

    Energy Technology Data Exchange (ETDEWEB)

    Arteaga A, T.; Ortiz R, J.M.; Vega C, H.R.; Hernandez D, V.M.; Manzanares A, E.; Mercado S, G.A. [Unidades Academicas de Estudios Nucleares, Ingenieria Electrica y Matematicas, Universidad de Zacatecas, A.P. 336, 98000 Zacatecas (Mexico)]. e-mail: tarcicio70@yahoo.co.uk

    2006-07-01

    People that live in high places respect to the sea level, in latitudes far from the equator or that they travel by plane, they are exposed to atmospheres of high radiation generated by the cosmic rays. Another atmosphere with radiation is the medical equipment, particle accelerators and nuclear reactors. The evaluation of the biological risk for neutron radiation requires an appropriate and sure dosimetry. A commonly used system is the Bonner Sphere Spectrometer (EEB) with the purpose of reconstructing the spectrum that is important because the equivalent dose for neutrons depends strongly on its energy. The count rates obtained in each sphere are treated, in most of the cases, for iterative methods, Monte Carlo or Maximum Entropy. Each one of them has difficulties that it motivates to the development of complementary procedures. Recently it has been used Artificial Neural Networks, ANN) and not yet conclusive results have been obtained. In this work it was designed an ANN to obtain the neutron energy spectrum neutrons starting from the counting rate of count of an EEB. The ANN was trained with 129 reference spectra obtained of the IAEA (1990, 2001), 24 were built as defined energy, including isotopic sources of neutrons of reference and operational, of accelerators, reactors, mathematical functions, and of defined energy with several peaks. The spectrum was transformed from lethargy units to energy and were reaccommodated in 31 energies using the Monte Carlo code 4C. The reaccommodated spectra and the response matrix UTA4 were used to calculate the prospective count rates in the EEB. These rates were used as entrance and its respective spectrum was used as output during the net training. The net design is Retropropagation type with 5 layers of 7, 140, 140, 140 and 31 neurons, transfer function logsig, tansig, logsig, logsig, logsig respectively. Training algorithm, traingdx. After the training, the net was proven with a group of training spectra and others that

  18. Characterization of the neutron spectra at the final of the installations labyrinth with medical accelerators; Caracterizacion del espectro de neutrones al final del laberinto de instalaciones con aceleradores medicos

    Energy Technology Data Exchange (ETDEWEB)

    Carelli, J.; Cruzate, J.A.; Gregori, B.; Papadopulos, S.; Discacciatti, A. [Autoridad Reguladora Nuclear, Av. del Libertador 8250, Buenos Aires (Argentina)]. e-mail: jcarelli@cae.arn.gov.ar

    2006-07-01

    A linear electron accelerator for medical use is an equipment dedicated to the production of collimated beams of electrons and/or photons. In an accelerator of a bigger potential or equal to 6 MV, are produced neutrons starting from the reaction (gamma, n) due to the interaction of the photons with the materials that compose the headset and the target. In this work the theoretical and experimental studies carried out to characterize the neutron spectra to the exit of the labyrinth of three bunkers of different geometry with accelerators of 15 MV, with the purpose of evaluating the effective dose of the occupationally exposure personnel are presented. It was carried out the simulation of the neutron transport with the MCNPX code and the ENDF/B - VI library. With the objective of analyzing the variables that affect the spectral distribution the bunkers of two existent facilities in Argentina were modeled. It was considered a isotropic punctual source located in the supposed position of the target. The spectra of {sup 252} Cf and of Watt of 1.8 MeV of half energy were simulated. The election of the sources was based on published works that suppose initial neutron sources with half energy between 1.8 and 2.3 MeV for accelerators of 15 at 25 MV. Its were considered headsets of different dimensions, with and without phantom of water disperser in the patient's position and several field dimensions in the isocenter. The spectral distribution doesn't present significant differences in the different modeling situations. Its were carried out measurements, with the multisphere spectrometric system based on twelve polyethylene spheres and a spherical detector of {sup 3} He, to the exit of each one of the bunkers. It was carried out the convolution of the spectrum using the MXD{sub F}C33 code (of the UMG33 set), considering as initial spectrum that of the fission type (inverse of the energy). The obtained spectra and the environmental equivalent dose rate in each case

  19. Crescimento in vitro e aclimatização de Cattleya loddigesii Lindley (Orchidaceae com carvão ativado sob dois espectros luminosos In vitro growth and acclimatization of Cattleya loddigesii Lindley (Orchidaceae with actived charcoal in two light spectra

    Directory of Open Access Journals (Sweden)

    Renato Fernandes Galdiano Júnior

    2012-05-01

    Full Text Available O objetivo deste estudo foi avaliar a adição de concentrações de carvão ativado em meio de cultura ½ MS (com metade da concentração dos macronutrientes sob dois espectros luminosos para a obtenção de plântulas in vitro de Cattleya loddigesii. Plântulas com aproximadamente 90 dias foram subcultivadas em oito tratamentos, nos quais foi testada a adição ao meio de cultura ½ MS com carvão ativado (0; 0,5; 1,0 e 2,0g L-1 e combinados sob espectro de luz branca e luz vermelha. Após 180 dias da germinação, foram mensurados dados biométricos (raiz e parte aérea, massa fresca e teores de pigmentos fotossintéticos. Em plântulas aclimatizadas em casa de vegetação, foram avaliadas a taxa de sobrevivência após 120 dias. As concentrações de clorofila total, clorofila a e carotenoides foram maiores nos tratamentos sob luz branca, enquanto a luz vermelha influenciou significativamente maior clorofila b, plântulas com menos raízes e de menor comprimento e elevada mortalidade ex vitro. A adição de 2,0g L-1 de carvão ativado ao meio de cultura e o uso de luz branca proporcionaram maior eficiência de desenvolvimento tanto para as culturas in vitro quanto para a sobrevivência ex vitro das plantas.The aim of this study was to evaluate the effect of different concentrations of activated charcoal in ½ MS (half concentration of macronutrients culture medium under two light spectra on the in vitro growth of Cattleya loddigesii seedlings. Plantlets with approximately 90 days were subcultured under eight treatments, consisting of different active charcoal concentrations (0; 0.5; 1.0 and 2.0g L-1 in ½ MS medium combined with white and red light spectra. After 180 days of germination, biometric data, fresh weight, and the level of photosynthetic pigments were evaluated. Plantlets acclimatized in a greenhouse were evaluated for survival after 120 days. Total chlorophyll, chlorophyll a, and carotenoid concentrations were higher in

  20. Calibrações por meio da técnica da espectroscopia no infravermelho próximo para teor de extrativos totais, de lignina total e holocelulose usando espectros obtidos na madeira sólida / Calibrations using the technique of near infrared spectroscopy for content of extractives, lignin total and holocellulose using spectra obtained in solid wood

    Directory of Open Access Journals (Sweden)

    Carlos Rogério Andrade

    2011-04-01

    Full Text Available O objetivo desse trabalho foi obter curvas de calibrações por meio da técnica de espectroscopia no infravermelho próximo (NIRS para as propriedades teor de extrativos totais, lignina total e de holocelulose, usando espectros das faces radial, tangencial e transversal da madeira sólida. Foi utilizado um híbrido natural de Eucalyptus urophylla pertencente à empresa V&M Florestal, localizada no município de Paraopeba (MG. O híbrido tinha sete anos de idade e estava plantado em espaçamento de 3m x 3m. Os corpos-de-prova foram retirados ao longo de todo o fuste. O equipamento utilizado foi um espectrômetro da marca Bruker modelo MPA-R. Os espectros foram adquiridos na gama de 800 a 1.500 nm, em modo de reflexão difusa. Os modelos foram ajustados pelo método PLS-1. Foi utilizado o método da validação cruzada com pré-tratamentos de primeira e segunda derivada e remoção do espalhamento de luz. Pelos resultados conclui-se que: De maneira geral, os maiores valores de correlação foram obtidos a partir da média das faces tangencial, transversal e radial; as melhores calibrações foram obtidas quando aplicou-se o pré-tratamento de segunda derivada; melhores resultados: extrativos totais r = 0,66 e RPD = 1,3; teor de lignina total r = 0,70 e RPD = 1,5 e teor de holocelulose r = 0,66 e RPD = 1,4.AbstractThe purpose of this study was to obtain calibration curves using Near Infrared Spectroscopy Technique (NIRS for the determination of total extractive content, total lignin, and holocellulose, using the radial face, tangential, and transversal spectra of solid wood. We used a natural hybrid of Eucalyptus urophylla owned by V & M Florestal, located in Paraopeba city (MG. The hybrid was seven years old and was planted in 3m x 3m space. The soils-proof was taken throughout the shaft. The used equipment was a Bruker spectrometer brand model MPA-R. The spectra were acquired in the range from 800 to 1,500 nm in diffuse reflection mode. The

  1. Forecast of physicochemical properties and chemical composition of gasoline from infrared spectra, using multivariate calibration; Previsao de propriedades fisico-quimicas e composicao quimica da gasolina a partir de espectros infravermelhos, utilizando calibracao multivariada

    Energy Technology Data Exchange (ETDEWEB)

    Cocco, Lilian Cristina; Yamamoto, Carlos Itsuo [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Lab. de Analise de Combustiveis Automotivos (LACAUTets)

    2008-07-01

    This work describes the attainment of mathematical models, applying multivariate calibration in infrared spectrum with ATR, from 128 gasoline samples with diverse chemical compositions, collected in a period of two and a half years. Infrared spectra had been used to assemble the input matrix for the modeling, whereas the standardized assays and gaseous chromatography had supplied the output matrices. Ninety samples were been used for training and 38 for testing. In order to calibrate chemical composition from chromatography, the techniques of mass spectrometry and chemical ionization were used to identify unknown substances and improve the fitting of the mathematical models. Two hundred and ninety substances were detected and identified, from which 100 were unknown. Six PLS/PCR models were attained to predict some properties as specific mass, Reid vapor pressure, T10, T50, T90 and PFE from distillation curve. Another six PLS/PCR models were attained to predict the amount of aromatics, paraffins, isoparaffins, naphthenes, olefins and oxygenates. In general, mathematical models were attained with good training fit, with correlation coefficients higher than 0,975 (T10) and reaching a maximum of 0,998 (naphthenes) and they are able to forecast an average chemical percentage and properties of interest from gasoline, with acceptable prediction errors. (author)

  2. Spectra and neutron dose of an 18 MV Linac using two geometric models of the head; Espectros y dosis por neutrones de un Linac de 18 MV usando dos modelos geometricos del cabezal

    Energy Technology Data Exchange (ETDEWEB)

    Barrera, M. T.; Pino, F.; Barros, H.; Sajo-Bohus, L. [Universidad Simon Bolivar, Laboratorio de Fisica Nuclear, Sartenejas, Baruta 1080-A, Caracas (Venezuela, Bolivarian Republic of); Davila, J. [Fisica Medica C. A., Av. Francisco de Miranda s/n, Los Palos Grandes, 1060 Miranda (Venezuela, Bolivarian Republic of); Salcedo, E. [Centro Medico Docente La Trinidad, Av. de El Haltillo, Caracas (Venezuela, Bolivarian Republic of); Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas, Zac. (Mexico); Benites R, J. L., E-mail: mariate9590@gmail.com [Centro de Cancerologia de Nayarit, Servicio de Seguridad Radiologica, Calz. de la Cruz 118 Sur, 63000 Tepic, Nayarit (Mexico)

    2015-10-15

    Full text: Using the Monte Carlo method, by MCNP5 code, simulations were performed with different source terms and 2 geometric models of the head to obtain spectra in energy, flow and doses of photo-neutrons at different positions on the stretcher and in the radiotherapy room. The simplest model was a spherical shell of tungsten; the second was the complete model of a heterogeneous head of an accelerator Varian ix. In both models Tosi function was used as a source term. In addition, for the second model Sheikh-Bagheri distribution was used for photons and photo-neutrons were generated. Also in both models the radiotherapy room of Gurve group of the Teaching Medical Center La Trinidad was included, which is equipped with an accelerator Varian Clinic 2100. In this Center passive detectors PADC (Cr-39) were irradiated with neutron converters, with 18 MeV photons radiation. The measured neutron flow was compared with that obtained with Monte Carlo calculations. The Monte Carlo flows are similar to those measured at the isocenter. The simplest model underestimates the neutron flow compared with the calculated flows with the heterogeneous model of the head. (Author)

  3. Neutron spectra calculation and doses in a subcritical nuclear reactor based on thorium; Calculo de espectros de neutrones y dosis en un reactor nuclear subcritico a base de Torio

    Energy Technology Data Exchange (ETDEWEB)

    Medina C, D.; Hernandez A, P. L.; Hernandez D, V. M.; Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas, Zac. (Mexico); Sajo B, L., E-mail: dmedina_c@hotmail.com [Universidad Simon Bolivar, Laboratorio de Fisica Nuclear, Apdo. Postal 89000, Caracas 1080A (Venezuela, Bolivarian Republic of)

    2015-10-15

    This paper describes a heterogeneous subcritical nuclear reactor with molten salts based on thorium, with graphite moderator and a source of {sup 252}Cf, whose dose levels in the periphery allows its use in teaching and research activities. The design was done by the Monte Carlo method with the code MCNP5 where the geometry, dimensions and fuel was varied in order to obtain the best design. The result is a cubic reactor of 110 cm side with graphite moderator and reflector. In the central part they have 9 ducts that were placed in the direction of axis Y. The central duct contains the source of {sup 252}Cf, of 8 other ducts, are two irradiation ducts and the other six contain a molten salt ({sup 7}LiF - BeF{sub 2} - ThF{sub 4} - UF{sub 4}) as fuel. For design the k{sub eff}, neutron spectra and ambient dose equivalent was calculated. In the first instance the above calculation for a virgin fuel was called case 1, then a percentage of {sup 233}U was used and the percentage of Th was decreased and was called case 2. This with the purpose to compare two different fuels working inside the reactor. In the case 1 a value was obtained for the k{sub eff} of 0.13 and case 2 of 0.28, maintaining the subcriticality in both cases. In the dose levels the higher value is in case 2 in the axis Y with a value of 3.31 e-3 ±1.6% p Sv/Q this value is reported in for one. With this we can calculate the exposure time of personnel working in the reactor. (Author)

  4. Habilidades sociales en el espectro autista

    OpenAIRE

    Bejarano Cajachagua, Cesia

    2012-01-01

    Este trabajo es de naturaleza teórica. El propósito fue identificar las características de las habilidades sociales con las que cuenta una persona del espectro autista y hasta qué punto éstas pueden desarrollarse en el mismo. Se revisan los aportes de investigadores como Reviere (1997), Meléndez (2009) y el DSM-IV (2002), quienes consideran al autismo como un trastorno generalizado de desarrollo de tipo neurológico que afecta tres funciones específicas rela- cionadas entre sí, las cuales se d...

  5. HABILIDADES COMUNICATIVAS EN TRASTORNOS DEL ESPECTRO AUTISTA

    OpenAIRE

    2015-01-01

    Las investigaciones referentes al trastorno del espectro autista han avanzado mucho en los últimos años. Desde las aportaciones sobre autismo de Leo Kanner (1943) y Hans Asperger (1944,) el autismo ha estado sumergido en un eterno debate hasta que, finalmente, en los años 80 fue incorporado a los manuales diagnósticos. Por lo tanto, hasta hace pocas décadas, poco se sabía sobre este trastorno; aún menos cómo desarrollar el proceso educativo de estos niños. Actualmente, se investigan las numer...

  6. Habilidades sociales en el espectro autista

    OpenAIRE

    Bejarano Cajachagua, Cesia

    2012-01-01

    Este trabajo es de naturaleza teórica. El propósito fue identificar las características de las habilidades sociales con las que cuenta una persona del espectro autista y hasta qué punto éstas pueden desarrollarse en el mismo. Se revisan los aportes de investigadores como Reviere (1997), Meléndez (2009) y el DSM-IV (2002), quienes consideran al autismo como un trastorno generalizado de desarrollo de tipo neurológico que afecta tres funciones específicas rela- cionadas entre sí, las cuales se d...

  7. de calda e do espectro de gotas

    Directory of Open Access Journals (Sweden)

    José Luís Aguiar Figueiredo

    2007-01-01

    Full Text Available Se evaluó la influencia de la norma de aplicación y del espectro de gotas durante la aplicación de insecticidas, en el control de la mosca blanca (Bemisia tabaci, en el cultivo de la berenjena. Los ensayos constaron de muestras de menores y adultas de la mosca blanca en los tercios cimero y mediano de la parte aérea de plantas de berenjena, a los 4,7,14 y 21 días después de la aplicación de los tratamientos y del espectro de la población de gotas obtenido durante las aplicaciones. Los tratamientos utilizados fueron resultados de la combinación del tipo de equipamiento, boquillas hidráulicas y normas de pulverización, además del testigo donde no hubo aplicación. El uso de menores normas de aplicación produjo gotas de menor tamaño y mejor cobertura, evaluadas en términos de impactos por unidad de área . El mejor control de las menores y adultas de la mosca blanca fue obtenido a través de la combinación de la mochila manual dotada de válvula de presión constante (2 bar, boquilla abanico (API 11003 y norma de pulverización de 500 L/ha.

  8. Local structures and electronic band states of α−Fe2O3 polycrystalline particles in the glazes of the HIZEN celadons produced in the Edo period of Japan, by means of X-ray absorption spectra (II Estruturas locais e estados de banda de partículas policristalinas nos esmaltes de celadons Hizen produzidos no período Edo do Japão, por meio de espectros de absorção de raios X (II

    Directory of Open Access Journals (Sweden)

    M. Hidaka

    2011-06-01

    Full Text Available HIZEN celadon glazes produced in 1630's to 1790's (Edo period, Japan have been investigated by means of X-ray absorption spectra (XAS near a Fe-K edge by using synchrotron radiation and a Mössbauer spectrum. The XAS suggest that the local structure around Fe2O3 fine powders is slightly different between the Izumiyama ceramics of mainly the Quartz-SiO2 and Ohkawachi ceramics of mainly the feldspar of (K,NaSi3O8 (Sanidine, and that the glazes of the HIZEN celadons include the Fe2O3 fine powders in the glassy state, though the X-ray diffraction patterns of the glassy celadon glazes do not show any peaks of the Fe2O3 structure. The Mössbauer spectrum suggests that the celadon glaze of Seiji (m includes only Fe3+ ions, but not Fe2+ ions. This indicates the existence of Fe2O3 in the celadon glaze. It is interpreted that the colored brightness of the HIZEN celadons is induced by the structural properties of the used raw celadon ceramics and the other transition-metal ions of Cr, Cu, Zn in the celadon glazes, but not by the chemical reaction from Fe2O3 to FeO under the deoxidizing thermal treatment at higher temperature in a kiln.Esmaltes de celadon Hizen produzidos dos anos 1630 a 1790 (período Edo, Japão foram investigados por meio de espectros de absorção de raios X (XAS próximos da linha Fe-K usando radiação síncrotron e espectro Mossbaues. Os resultados de XAS sugerem que a estrutura local em pós finos de Fe2O3 é levemente diferente entre as cerâmicas Izumiyama principalmente o quartzo e cerâmicas Ohkawachi principalmente do feldspato (K,NaSi3O8 (Sanidine, e que os esmaltes dos celadons Hizen incluem finos pós de Fe2O3 no estado vítreo, embora os difratogramas de raios X dos esmaltes celadon não mostrem picos da estrutura do Fe2O3. O espectro Mossbauer sugere que os esmaltes celadon de Seiji (m incluem somente íons Fe3+, mas não Fe2+. Isto indica a existência de Fe2O3 no esmalte celadon. É feita a interpretação que o brilho

  9. Trastorno del espectro autista y función ejecutiva

    OpenAIRE

    2015-01-01

    Las alteraciones en la función ejecutiva, especialmente en flexibilidad cognoscitiva, planeación, control inhibitorio y memoria de trabajo constituyen un elemento cardinal dentro las manifestaciones del trastorno del espectro autista (TEA). El objetivo de este trabajo fue evaluar el desempeño de las pruebas de función ejecutiva en una población de pacientes con trastorno del espectro autista (TEA).

  10. Incrementando la calidad de los espectros echelle

    Science.gov (United States)

    Pintado, O. I.; Adelman, S. J.

    For more than 10 years we have obtained spectra with the REOSC and EBASIM spectrograph at CASLEO. Usually we use IRAF to extract the spectra. Then we normalized the 1-d spectra and measured the lines with REDUCE. In this paper we compare the results obtained using each program in different parts of the spectrum measurements process. Wih EBASIM, or 4th magnitude stars and 120 minute exposures we obtain signal-to-noise ratios near 500 in the center of the orders

  11. Análisis funcional computarizado de espectros de infrarrojo

    Directory of Open Access Journals (Sweden)

    Augusto Rivera

    2009-07-01

    Full Text Available CALIPSO: Se discute un programa para microcomputador diseñado para asistir al espectroscopista en la Interpretación de espectro de Infrarrojo. Es un programa interactivo que utiliza la lógica booleana y árboles de decisión binaria definido por la presencia o ausencia, intensidad y forma de un pico específico en un espectro de infrarrojo. La Información relacionada con los grupos funcionales presentes en la molécula es confiable.

  12. Measurement of the beta-gamma circular polarization correlation for the 0. 944 MeV positron and the 0. 720 MeV negatron of /sup 74/As

    Energy Technology Data Exchange (ETDEWEB)

    Purcell, R.M.

    1983-01-01

    The beta-gamma circular-polarization correlations associated with the 0.944 MeV positron and the 0.720 MeV negatron transitions of /sup 74/As have been measured as an average over the respective energy intervals E/sub ..beta../ = 0.30 to 0.94 MeV and Esub ..beta../ = 0.30 to 0.72 MeV. Two scintillation beta detectors, one at an instrument angle of 135 degrees and the other at an instrument angle of 150 degrees were employed. The method used was the forward Compton scattering of gamma-rays from magnetized iron. Special data analysis techniques were used to extract the best values of delta from experimental data that was considerably distorted from effects caused by the positron annihilation radiation. In addition, the non-linear response inherent to scintillation detectors was corrected for. The experimental data gave the following results for delta for the positron at 135 degrees, delta = -.0039 +/- 0.0035. At 150 degrees, delta = 0.0054 +/- 0.0028. For the negatron transition at 135 degrees, delta = 0.006 +/- 0.014. At 150 degrees delta = -0.005 +/- 0.011. Particularly of note is the fact that the signs of delta differ between the two instrument angles, necessitating a non-zero value of A/sub 3/. This suggests that the nature of admixing of the independent particle states which make up the actual nuclear states involved in the transition should be of considerable interest to nuclear theorists. Using the accepted value of A/sub 2/ for the positron transition and the experimental data yields the following result for P/sub ..gamma..: P/sub ..gamma..(/sup 74/As: 0.30 MeV

  13. Increase resolution of {sup 13}C NMR spectra of humic acids in solution by previous treatment with 0,03 mol L{sup -1} KCl; Aumento da resolucao de espectros de RMN {sup 13}C de acidos humicos em solucao atraves do tratamento previo com KCl 0,03 mol L{sup -1}

    Energy Technology Data Exchange (ETDEWEB)

    Canellas, Luciano Pasqualoto; Guridi, Fernando; Santos, Gabriel de A. [Universidade Federal Rural do Rio de Janeiro, RJ (Brazil). Dept. de Solos; Rumjanek, Victor Marcos [Universidade Federal, Rio de Janeiro, RJ (Brazil). Dept. de Quimica; Braz-Filho, Raimundo [Universidade Estadual do Norte Fluminense, Campos, RJ (Brazil). Setor de Quimica dos Produtos Naturais

    2001-02-01

    High levels of Fe and Mn present in some soils and compost organic matter decrease the resolution of {sup 13} C NMR spectra of humic substances. Addition of K Cl up to a concentration of 0,03 mol L{sub -}{sup 1} to humic substances extracts followed by centrifugation is an efficient method of eliminating clays and minerals containing high levels of paramagnetic metals such as Fe and Mn thus increasing the resolution of {sup 13} C NMR spectra. (author)

  14. El jardinero feliz: sobre populismo, democracia y espectros

    Directory of Open Access Journals (Sweden)

    Julián A. Melo

    2013-05-01

    Full Text Available Este texto tiene por finalidad rescatar diversos aspectos y debates en torno a la relación entre populismo y democracia. En ese sentido, expondremos los principales rasgos de las teorizaciones de autores como Margaret Canovan, Benjamín Arditi y Sebastián Barros para repensar los lazos entre aquellos dos términos. En un esfuerzo por no tomar a populismo y democracia como polos antitéticos en las formaciones políticas comunitarias, nos interesa resaltar el modo en que la idea de sombra y la de espectro han tenido centralidad en las concepciones de nuestros autores. Junto a esta reflexión, pretendemos retomar diversos núcleos discursivos de la experiencia del primer peronismo en la Argentina de mediados del siglo XX para indagar los modos en que la lógica del populismo peronista resignificó la democracia colocándola como elemento central de la identidad que se decía encarnar. Así, creemos que puede resultar interesante pensar no solo al populismo como espectro de la democracia sino también a la democracia como espectro del populismo.

  15. SIMULACIÓN DEL ESPECTRO EPR DEL RADICAL CO2-

    Directory of Open Access Journals (Sweden)

    Eduar Enrique Carvajal Taborda

    2013-09-01

    Full Text Available La  dosimetría EPR se basa en el hecho de que las radiaciones ionizantes interaccionan con el tejido mineralizado, en este caso es esmalte dental y tejido óseo, generan los radicales CO2- estables a temperatura ambiente y de larga vida cuya concentración depende de la dosis recibida. La cuantificación de estos radicales libres se hace por EPR, cuyo espectro característico consta de dos líneas, una muy intensa y otra de menor intensidad. En este trabajo identificamos teóricamente estas dos líneas solucionando el Hamiltoniano de espín electrónico y  simulando el espectro experimental, encontramos que el espectro ERP del radical CO2- es producido por la interacción del espín del electrón desapareado con el campo magnético externo y que el radical CO2- está ubicado en una simetría local axial.

  16. Application of Monte Carlo Method in the Analysis of Materials. Used in Flat Panel Detectors to Get X-ray spectra; Aplicacion del Metodo de Monte Carlo en el Analisis de Materiales Utilizados en Detectores Flat Panel para Obtener Espectros de Rayos X

    Energy Technology Data Exchange (ETDEWEB)

    Gallardo, S.; Pozuelo, F.; Querol, A.; Rodenas, J.; Verdu, G.

    2013-07-01

    They have used various methods of reconstruction for the X-ray spectrum curve knowing the dose-response function. The results demonstrate that the method modified truncated singular value decomposition (MTSVD) is appropriate to reconstruct the spectra of X-ray scintillator materials studied in this work.

  17. Sensitivity analysis of the spectra of the core neutronic source in the calculation of radiation damage in internal of PWR reactor vessel. Internal; Analisis de sensibilidad a los espectros de la fuente neutronica del nucleo en el calculo del dano por irradiacion en los internos de la vasija de un reactor PWR

    Energy Technology Data Exchange (ETDEWEB)

    Cadenas Mendicoa, A. M.; Benito Hernandez, M.; Barrerira Pereira, P.

    2012-07-01

    This study is to analyze the sensitivity to the expected differences in the energy spectra characterizing the neutron source that radiates the vessel internals of a commercial PWR reactor, in order to quantify their influence in the quantities that determine the damage in materials metal.

  18. Escherichia coli portador de betalactamasas de espectro extendido: resistencia

    Directory of Open Access Journals (Sweden)

    Mª C. Miranda García

    2013-12-01

    Full Text Available Introducción: Escherichia coli es el microorganismo que con más frecuencia se encuentra implicado en infecciones nosocomiales y comunitarias, patógeno responsable en la etiología de infecciones de vías respiratorias altas, infecciones del tracto urinario, heridas quirúrgicas, sangre o gastroenteritis. En los últimos años ha experimentado importantes cambios encontrándose un aumento de infecciones por cepas de éstos microorganismos productores de betalactamasas de espectro extendido. Objetivos: Se decide hacer este estudio retrospectivo de las muestras procesadas en el Laboratorio de Microbiología del Hospital Básico de la Defensa San Carlos (San Fernando, para conocer la frecuencia y el patrón de sensibilidad en nuestra población por gérmenes productores de betalactamasas de espectro extendido en este caso por Escherichia coli, dada la importancia de las infecciones causadas por esta bacteria y la repercusión que tiene por todo el mundo los mecanismos de resistencia. Material y Método: Se recogieron los datos de resultados obtenidos en las muestras procesadas en el Laboratorio de Microbiología durante 36 meses (Enero 2009 a Diciembre 2011, en las que se hubieran identificado cepas de Escherichia coli y de éstas las productoras de betalactamasas de espectro extendido. Resultados: Se aislaron 34 cepas de Escherichia coli productoras de betalactamasas de espectro extendido lo que supone una tasa del 5,10%. Se encontró una frecuencia mayor en el año 2010 (6,9% que en el 2009 (2,61%, pero similar al 2011 (5,98%. Conclusión: La frecuencia de cepas Escherichia coli con betalactamasas de espectro extendido encontrada es similar a la de otros estudios realizados en España, pero la tasa de resistencia de algunos antimicrobianos como Amoxicilina/clavulánico, Cotrimoxazol y Fluorquinolonas en nuestra población es elevada.

  19. Alternative collimator for CdTe (model XR-100T), when it is used for a direct measurements of radiodiagnostic spectra; Colimador alternativo para um detector de CdTe (modelo XR-100T), usado em medidas diretas de espectros de radiodiagnostico

    Energy Technology Data Exchange (ETDEWEB)

    Soares, C.; Guevara, M.V. Manso; Milian, F. Mas; Garcia, F., E-mail: mvictoria.mansoguevara@gmail.com [Universidade Estadual de Santa Cruz (CPqCTR/UESC), Ilheus, BA (Brazil). Departamento de Ciencias Exatas; Nieto, L. [Universidade Estadual do Sudoeste da Bahia (UESB), Itapetinga, BA (Brazil)

    2014-01-15

    The spectrum simulation is a powerful instrument of great practical and pedagogical usefulness, because it helps to understand the technical and the instrumental limits of parameters in optimized measurements of magnitudes of interest in physics. Monte Carlo models, based on particle and radiation transport, provide easy and flexible tools for simulating complex geometries and materials. Particularly, MCNPX code is used to compare, manipulate, and quantify simulated and measured spectra. The purpose of this work is to use this tool set to estimate the characteristics of a collimation device, avoiding permanent and temporary damages into the diode-pin detector, during direct measurements of the Bremsstrahlung's spectrum, which was generated from diagnosis tubes with medical purpose. The simulations were made with a maximum voltage of 150 kVp, and typical charges used in radiological protocols in the medical area. Also, differential high pulse spectra, simulated and measured with a CdTe Detector, are reported. (author)

  20. Unambiguous assigning of the signals of the nuclear magnetic resonance spectra of {sup 1} H and {sup 13} C of monoterpenes using computational methods; Asignacion inequivoca de las senales del espectro de resonancia magnetica nuclear de {sup 1} H y {sup 13} C de monoterpenos empleando metodos computacionales

    Energy Technology Data Exchange (ETDEWEB)

    Cortes, F.; Cuevas, G.; Tenorio, J.; Rochin, A.L. [Universidad Nacional Autonoma de Mexico, Instituto de Quimica, A.P. 70213, 04510 Mexico D.F. (Mexico)

    2000-07-01

    Ab initio calculations, within the frame of Density Functional Theory were carried out on camphene and {alpha}-pinene. The {sup 1} H and {sup 13} C shifts were estimated according to the recently developed Sum-Over-States Density Functional Perturbation Theory (SOS-DFPT) as implemented in a modified deMon-KS program. The calculations not only reproduced the observed NMR chemical shifts, quantitatively in the case of {sup 1} H nuclei and qualitatively in the case of {sup 13} C nuclei, but also allow assigning unambiguously the signal on these spectra. (Author)

  1. Spectral range calculation inside the Research Irradiating Facility Army Technology Center using code MCNPX and comparison with the spectra of energy Caesium 137 raised in laboratory; Calculo gama espectral no interior do irradiador de pesquisa do Centro Tecnologico do Exercito utilizando o codigo MCNPX e comparacao com espectros de energia do Cesio 137 levantados em laboratorio

    Energy Technology Data Exchange (ETDEWEB)

    Gomes, Renato G.; Rebello, Wilson F.; Cavaliere, Marcos Paulo; Vellozo, Sergio O.; Moreira Junior, Luis, E-mail: renatoguedes@ime.eb.br, E-mail: rebello@ime.eb.br, E-mail: eng.cavaliere@gmail.com, E-mail: vellozo@cbpf.br, E-mail: luisjrmoreira@hotmail.com [Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil); Vital, Helio C., E-mail: vital@ctex.eb.br [Centro Tecnologico do Exercito (CTEX), Barra de Guaratiba, RJ (Brazil); Silva, Ademir X., E-mail: ademir@con.ufrj.br [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil)

    2013-07-01

    Using the MCNPX code, the objective was to calculate by means of computer simulation spectroscopy range inside the irradiation chamber upper radiator gamma research irradiating facility Army Technology Center (CTEx). The calculations were performed in the spectral range usual 2 points for research purposes irradiating the energy spectra of gamma rays from the source of Cesium chloride 137. Sought the discretization of the spectrum in 100 channels at points of upper bound of 1cm higher and lower dose rates previously known. It was also conducted in the laboratory lifting the spectrum of Cesium-137 source using NaI scintillator detector and multichannel analyzer. With the source spectrum Cesium-137 contained in the literature and raised in the laboratory, both used as reference for comparison and analysis in terms of probability of emission maximum of 0.661 MeV The spectra were quite consistent in terms of the behavior of the energy distributions with scores. The position of maximum dose rate showed absorption detection almost maximum energy of 0.661 MeV photopeak In the spectrum of the position of minimum dosage rate, it was found that due to the removal of the source point of interest, some loss detection were caused by Compton scattering. (author)

  2. Espectros de la ciudad de México

    OpenAIRE

    2009-01-01

    "Espectros del DF" aborda el tema del discurso urbano bajo la perspectiva del simulacro. Una de las ciudades más grandes del mundo, México, DF, difícil de abarcar como entorno físico, se define cotidianamente por las representaciones que de ella hacen sus habitantes. Esto se remonta a la imagen fundadora que persiguieron los aztecas (el águila devorando una serpiente) y llega hasta los posibles contactos con extraterrestres. Las imágenes de la ciudad la traducen en otra, que responde a una ló...

  3. Analysis of the additional filtration effects in X-ray beams from the calculation of average energy for photon in X-ray spectra; Analise dos efeitos da filtracao adicional em feixes de raios X a partir dos calculos de energia media por foton em espectros de raios X

    Energy Technology Data Exchange (ETDEWEB)

    Lucena, Rodrigo F.; Potiens, Maria da Penha A., E-mail: rodrigoifusp@yahoo.com.b [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2011-12-15

    The objective of this work was to analyze the behavior of X-ray spectra by calculating the average energy in each spectrum generated for different additional filtrations inserted in the X-ray beam. It was used an X-ray system present in the Laboratory of Instruments Calibration of the Instituto de Pesquisas Energeticas e Nucleares (IPEN) for the generation of X-ray beams, a spectrometry system with a solid state detector (semiconductor) to the data acquisition and aluminum and copper filters, with different thicknesses to be inserted in the output of the X-ray tube. The average energy per photon was calculated integrating the curve of each spectrum and dividing the value by the total number of counts. This calculation enabled to verify that the use of filtration in the X-ray equipment contributes significantly in the average energy of the X-ray beam. Thus, the same dose received by a patient or recorded by a detector has distinct average energies due to the use of filtrations with different materials and thicknesses, which allows the manipulation of X-ray beam through additional filtration. (author)

  4. Análisis extendido al rojo de espectros estelares

    Science.gov (United States)

    Pintado, O. I.; Adelman, S. J.

    En trabajos anteriores hemos estudiado las atmósferas de 8 estrellas de Mercurio-Manganeso (14 Hya, {κ Cnc, 28 Her, 3 CenA, HR4487, HR4817, HR7245 y μ Lep) y 7 Sex, usando espectros obtenidos con el espectrógrafo REOSC del CASLEO. Con observaciones realizadas recientemente podemos extender el análisis hasta los 650 nm. Se muestra que en la región comprendida entre los 460 y 650 nm hay suficiente cantidad de líneas espectrales como para realizar una muy buena determinación de abundancias que nos permita obtener una mejor caracterización de las estrellas estudiadas.

  5. Los trastornos del espectro autista. Una perspectiva evolutiva Autistic spectrum disorders: An evolutive perspective

    OpenAIRE

    2009-01-01

    Los trastornos del espectro autista constituyen un grupo de alteraciones neuroevolutivas que se presentan en una amplia variedad de expresiones clínicas, siendo todas consecuencia de disfunciones multifactoriales en el desarrollo del sistema nervioso central. En los sistemas internacionales de clasificación los trastornos del espectro autista están agrupados bajo el epígrafe de Trastornos Generalizados del Desarrollo. En todos los trastornos de este grupo se observan alteraciones cu...

  6. Caracterización de efectos de la mezcla gasolina-etanol en un motor Armfield Volkswagen CM11 mediante el levantamiento de una base de datos por análisis de gases y espectros de vibración

    OpenAIRE

    Carpio Pesantez, Miriam Soledad; Cedillo Sánchez, Félix Rufino

    2015-01-01

    El documento consiste en un análisis de espectros de vibración y los gases contaminantes emanados por el motor Armfield CM11, utilizando porcentajes de mezcla gasolina-etanol. Mediante el análisis ANOVA se determina la mezcla ideal, la misma que presenta una disminución de los gases sin afectar el torque, potencia y espectro de vibración. This document is an analysis of vibrational spectra and contaminants gases from the engine Armfield CM11, using percentages of gasoline-ethanol mixture. ...

  7. Calculation of the spectra of photons from 6 to 15 MeV emitted by a linac by deconvolution response matrix generated from the gradients depth dose calculated by MCNP simulation; Calculo de los espectros de fotones de 6 y 15 MeV emitidos por un linac mediante la deconvolucion de la matriz respuesta generada a partir de los gradientes de la dosis en profundidad calculadas mediante simulacion MCNP

    Energy Technology Data Exchange (ETDEWEB)

    Juste, B.; Miro, R.; Verdu, G.; Diez, S.; Campayo, J. M.

    2011-07-01

    This paper proposes a technique to significantly improve the accuracy of reconstructed Bremsstrahlung spectra from depth dose data using inverse methods. While traditional approaches directly use depth dose curves, we show the advantage of using the gradient of these data for the reconstruction of spectra.

  8. Abundancias químicas de estrellas de Mercurio-Manganeso obtenidas con espectros EBASIM

    Science.gov (United States)

    Pintado, O. I.; Adelman, S. J.

    Se determinan las abundancias químicas de estrellas de HgMn usando espectros obtenidos con EBASIM en CASLEO en un rango de longitud de onda comprendido entre los 400 y 890 nm. Los valores iniciales de temperatura efectiva y gravedad superficial se calculan con la fotometría uvbyβ. Las abundancias se calculan usando WIDTH9 y SYNTHE. Los resultados se comparan análisis realizados por los autores usando espectros obtenidos con el espectrógrado REOSC del CASLEO, el espectrógrafo echelle del Telescopio Anglo-Australiano y el espectrógrafo Coudé del Dominion Astrophysical Observatory.

  9. Antibioterapia de largo espectro como factor de risco para o isolamento de acinetobacter baumanni multiresistente

    OpenAIRE

    2014-01-01

    Antibioterapia de largo espectro é reconhecida como um factor de risco para a infecções multiresistentes. O objectivo é avaliar a associaçao entre antibioterapia de largo espectro com Meropenem (MP) e Piperacilina/Tazobactam (PT) com o isolamento de Acinetobacter baumanni multiresistente (ABMR). Estudo caso-controlo retrospectivo. Incluidos os individuos com ABMR+ no nosso hospital em 2010. Calculamos a incidenca nos Serviços Cirúrgicos, Serviços Médicos e Unidades de Cuidados Intensi...

  10. Modificaciones en la gestión del espectro: opciones y situación actual

    OpenAIRE

    Feijoo Gonzalez, Claudio Antonio; Gómez Barroso, José Luis; Mochón, Asunción

    2011-01-01

    El objetivo de este artículo es presentar las opciones que están considerándose (incluso ya aplicándose) para la reforma de los mecanismos de gestión del espectro radioeléctrico y evaluar su conveniencia y oportunidad. En concreto, se describen y valoran los tres cambios más profundos en este posible cambio de modelo: autorización del mercado secundario, utilización de la subasta para la asignación primaria y liberalización plena del uso del espectro. El proceso ya en marcha de introducción d...

  11. Oscilaciones acústicas y el espectro de potencias

    Directory of Open Access Journals (Sweden)

    L. Castañeda

    2007-01-01

    Full Text Available En el paradigma actual de la cosmología, el modelo que goza de mayor aceptación, dadas las pruebas observacionales, es conocido co- mo ΛCDM (Cosmic Microwave Background. Este modelo está dominado principalmente por dos constituyentes de los cuales la física sabe muy poco de ellos. La energía oscura, con un 70 %, es la principal componente y la causante de la expansión acelerada del Universo, mientras que la materia oscura, con un 25 % aproximadamente, es la componente principal de las estructuras auto-gravitantes. En mucho menos proporción se tiene la com- ponente bariónica, la principal constituyente de las estrellas y por ende de la parte luminosa de las galaxias. Otras especies con menor proporción son las constituyentes relativistas entre las cuales se tienen los neutrinos y fotones. Después del periodo de expansión acelerada del universo, de- nominado periodo inflacionario, debido a las altas temperaturas el plasma primordial constituído de especies relativistas fué el componente dominante en el Universo. En dicho plasma, la materia bariónica se encuentra ionizada y se acopla a la radiación via dispersión de Compton. Tal plasma caliente desarrolla inestabilidades manifiestas en ondas de sonido y rarefacciones. Estas perturbaciones son soportadas hasta cuando el Universo en su ex- pansión se ha enfriado lo suficiente para formar materia neutra. Después de esta recombinación, la radiación se desacopla formando el mar de fotones de CMB. Junto con perturbaciones métricas colocadas por inflación en el potencial de la materia oscura, las oscilaciones del plasma quedaron im- presas tanto en la temperatura de CMB como en el espectro de potencias de materia. Aquí se muestra como el Weak Lensing puede ser usado para estudiar estas oscilaciones.

  12. TRASTORNOS DEL ESPECTRO AUTISTA Y EXPOSICIONES OCUPACIONALES DE LOS PROGENITORES

    Directory of Open Access Journals (Sweden)

    Manuel Pino-López

    2013-01-01

    Full Text Available Fundamentos: Estudios con hermanos y gemelos sugieren un componente genético en el origen del autismo que no explica su crecimiento actual. El objetivo es investigar si factores ambientales como algunas exposiciones profesionales (trabajo nocturno, manejo de disolventes y/o campos electromagnéticos incrementan la probabilidad de trastornos del espectro autista (TEA en los hijos. Métodos: Estudio observacional de casos y controles mediante análisis de expedientes de 206 niños entre 16 y 36 meses de edad evaluados en el Servicio de Atención Temprana de Ciudad Real (70 con TEA y 136 no afectados. Para medir el riesgo de TEA asociado al trabajo nocturno, con disolventes y/o campos electromagnéticos se calculó la odds ratio (OR con un intervalo de confianza (IC del 95%. Resultados: El riesgo de TEA se multiplica por 2,22 cuando un progenitor trabaja en las ocupaciones estudiadas (OR=2,22, IC 95%=1,42-3,48, destacando trabajo con disolventes (OR=2,81, IC 95%=1,28-6,17 y nocturno (OR=2,18, IC 95%=1,21-3,93. El riesgo se multiplica por 3 si la madre trabaja en estas ocupaciones (OR=3, IC95%=1,44-6,26, destacando trabajo nocturno (OR=3,47, IC 95%=1,39-8,63 y con disolventes (OR=2,88, IC 95%=1,28-6,17. El riesgo se multiplica por 1,94 si el padre trabaja en estas ocupaciones(OR=1,94, IC 95%=1,07-3,53 y por 2,81 con disolventes (OR=2,81, IC 95%=1,01-7,86. Se encontró asociación positiva entre nivel educativo de los progenitores y TEA. Conclusiones: Encontramos relación significativa entre exposición de los progenitores a los riesgos estudiados y TEA en los hijos. Los resultados sugieren la participación de alteraciones genéticas ocasionadas por factores ambientales en el origen del trastorno.

  13. Utilización de espectros de RMN bidimensionales en la deducción

    Directory of Open Access Journals (Sweden)

    Juan C. Martínez Valderrama

    2010-06-01

    Full Text Available Se ilustra la metodología para la deducción total de la estructura de una molécula orgánica desconocida, del tipo piranocoumarina (5-metoxiseselin, utilizando espectros de RMN bidimensionales de diferentes clases: COSY H-H, NOESY y HETCOR C-H a un enlace y a larga distancia.

  14. Aspectos genéticos y neuroendocrinos en el trastorno del espectro autista

    Directory of Open Access Journals (Sweden)

    Norma Oviedo

    2015-01-01

    Full Text Available El autismo, hoy en día definido como trastornos del espectro autista, fue descrito inicialmente en 1943. Se caracteriza por alteraciones en la comunicación, la interacción social y un espectro restringido de intereses del paciente. Generalmente se identifica en etapas tempranas del desarrollo a partir de los 18 meses de edad. Actualmente el autismo se considera un desorden neurológico con un espectro que abarca diferentes grados que se asocian con factores genéticos, no genéticos y del medio ambiente. Dentro de los factores genéticos se han referido diversos síndromes relacionados con este trastorno. Asimismo, el autismo se ha estudiado a nivel genético, neurofisiológico, neuroquímico y neuropatológico. Las técnicas de neuroimagen han mostrado múltiples anormalidades estructurales en estos pacientes. También se han observado alteraciones relacionadas en los sistemas serotoninérgico, GABAérgico, catecolaminérgico y colinérgico. En este trabajo se presenta una actualización de la información de los aspectos genéticos y neuroendocrinos del trastorno del espectro autista.

  15. Espectro de Lyapunov de un Oscilador Colpitts en Base Común

    Directory of Open Access Journals (Sweden)

    Camilo Andrés Florez

    2013-09-01

    Full Text Available En el presente documento se presenta la definición de exponentes de Lyapunov de un sistema autónomo no lineal de tiempo continuo y una técnica recomendada para medir dicho conjunto de exponentes (espectro, con la finalidad de detectar la existencia de ciclos límites o de caos en un circuito oscilador Colpitts implementado con un transistor BJT. A partir del modelo de Ebers-Möll del transistor BJT se derivaron las ecuaciones de estado que rigen al circuito, luego se adoptó un caso numérico de estudio, y mediante el uso de un programa de simulación matemática se aplicó la metodología propuesta para determinar el espectro de Lyapunov del oscilador. Los resultados obtenidos evidencian la existencia de caos para algunos conjuntos de valores de los parámetros del circuito.

  16. Digitalización de espectros fotográficos de standards MK

    Science.gov (United States)

    Corti, M.; Morrell, N.

    Se digitalizaron 70 espectros fotográficos de estrellas standards de clasificación MK con tipos espectrales comprendidos entre O3 y A2 y diferentes clases de luminosidad. Las observaciones utilizadas consisten en espectrogramas cuya dispersión recíproca es de 43 Å~mm-1, obtenidos con el telescopio de 1m de Cerro Tololo y su espectrógrafo Cassegrain, durante los años 1982 a 1985. Los trazados digitales se obtuvieron con el instrumento Grant de la Facultad de Ciencias Astronómicas y Geofísicas de La Plata y posteriormente fueron calibrados en longitud de onda y rectificados utilizando rutinas comprendidas dentro del paquete de procesamiento de imágenes IRAF. El material resultante puede utilizarse como ayuda para la clasificación de espectros obtenidos con similar configuración instrumental.

  17. Sondeo compresivo aplicado al sondeo de espectro de banda ancha eficiente en sistemas de radio cognitivo

    Directory of Open Access Journals (Sweden)

    Evelio Astaiza Hoyos

    2017-01-01

    Full Text Available Contexto: El sondeo de espectro es universalmente conocido como el principal habilitador de radio cognitivo (CR, dado que dota al dispositivo de CR de la capacidad de conocimiento del entorno de radio. Objetivo: En este artículo se presenta un algoritmo diseñado para realizar el sondeo de espectro de banda ancha en sistemas de radio cognitivo (CR. Método: El sondeo de espectro está basado en sondeo compresivo (CS, mediante el cual los usuarios cognitivos, sin necesidad de conocimiento a priori de características de la señal en el entorno de radio, minimizan la cantidad de muestras a procesar y, con ello, reducen de forma proporcional los tiempos de detección, consumos de energía y capacidades de procesamiento requeridas en los dispositivos de radio cognitivo (CRD. Resultados:  El desempeño del algoritmo propuesto se evalúa mediante la obtención de las curvas de probabilidad de detección, probabilidad de omisión de detección, probabilidad de falsa alarma y las características operativas del receptor (ROC en comparación con otros algoritmos propuestos en el estado del arte. Conclusión: Los resultados de simulación demuestran que el método propuesto permite realizar el sondeo de espectro de manera eficiente, mejorando el desempeño del sondeo en función de la probabilidad de detección y de las características operacionales del receptor con respecto a otros algoritmos propuestos basados en muestreo sub-Nyquist.

  18. Taxonomía de asteroides y cometas basada en los espectros de Lyapunov

    Science.gov (United States)

    Tancredi, G.; Motta, V.; Froeschlé, C.

    Estudiaremos dos familias de objetos que sufren encuentros cercanos con planetas, a saber: la familia de cometas de Júpiter (JF) y los asteroides cercanos a la Tierra (NEAs). El movimiento de estos objetos es caótico en una escala de tiempo corta. Más aún, debido a los cambios erráticos en los elementos orbitales, la comparación de los valores actuales da poca información acerca de la posible vinculación dinámica entre los objetos de una misma familia. Calculamos una estimación finita de los Exponentes Característicos de Lyapunov (LCE), los llamamos Indicadores Característicos de Lyapunov (LCI) para ambas familias y analizamos las características del espacio de fase donde tiene lugar el movimiento de estos objetos. Integrando en un período suficientemente largo (e.g. 20000 años), encontramos que el LCI alcanza un valor cuasi-constante. La mayoría de los miembros de ambas familias muestran una concentración de los tiempos de Lyapunov (inverso del LCI) de alrededor de 50-100 años (Tancredi, 1995, Astron & Astrop., 299, 288). La concentración de los tiempos de Lyapunov es mayor para la familia de Júpiter que para los NEAs. Entre estos últimos, la menor dispersión se da para aquellos que cruzan la órbita de la Tierra. Se demostró que el espectro de los `indicadores locales' (Froeschlé et. al., 1990, Cel. Mec. 56, 307) o ``números de estiramiento'' (Voglis and Contopoulos, 1994, J. Phys. A 26, 4899) (relacionados con el LCI) son invariantes y nos dan una información más completa sobre el comportamiento caótico. Mediante la comparación de espectros discutimos la similitud entre los objetos de una misma familia y analizamos las diferentes posibles rutas al caos. Los espectros se clasifican mediante la comparación de los momentos de las distribuciones de los `números de estiramiento'. Aplicamos un método de agrupamiento jerárquico (Zappala et. al., 1990, Astron. J. 100, 2030) para identificar ``familias'' de espectros (grupos de espectros

  19. Transtornos alimentares e os espectros do humor e obsessivo-compulsivo Eating disorders and the mood and obsessive-compulsive spectrum

    Directory of Open Access Journals (Sweden)

    Leonardo F Fontenelle

    2002-12-01

    Full Text Available Revisamos os estudos clínicos e biológicos que sugerem que os transtornos alimentares (TA são expressões fenotípicas de outros transtornos psiquiátricos e parte de espectros de psicopatologia, em especial dos espectros dos transtornos do humor e do transtorno obsessivo-compulsivo. A investigação da relação entre os TA e outros transtornos psiquiátricos através dos modelos espectrais pode proporcionar um melhor entendimento da fisiopatologia destas síndromes e a elaboração de tratamentos mais eficazes. Entretanto, o reconhecimento de que os TA possuem características peculiares e a adoção de uma postura crítica em relação a modelos que eliminam limites diagnósticos são também fundamentais para a evolução do conhecimento no campo.We reviewed the clinical and biological studies which have suggested that eating disorders (ED are phenotypical expressions of other psychiatric disorders and part of the spectra of other psychopathologies, specially the mood and obsessive-compulsive spectrum disorders. The study of the relationship between ED and other psychiatric disorders using the spectrum model of psychopathology may allow a better understanding of the pathophysiology of such syndromes and tailoring more effective treatments. However, the recognition that ED display particular characteristics and the adoption of a critical view with regard to models that eliminate diagnostic limits may also be important for the advancement in the area of eating behaviors.

  20. El uso de la musicoterapia para la mejora de la comunicación de niños con Trastorno del Espectro Autista en Aulas Abiertas Especializadas

    National Research Council Canada - National Science Library

    Talavera Jara, Paloma Del Rocío; Gértrudix Barrio, Felipe

    2016-01-01

    Los beneficios que aporta la musicoterapia en alumnos con Trastorno del Espectro Autista, han sido demostrados profusamente por los distintos autores, si bien carecemos de literatura suficiente sobre...

  1. Necesidades de aprendizaje de los especialistas de Medicina General Integral sobre los trastornos del espectro autista

    Directory of Open Access Journals (Sweden)

    Víctor Tadeo Pérez Martínez

    Full Text Available Introducción: las necesidades de aprendizaje resultan de contrastar un desempeño ideal o propuesto con el real, bien sea para un individuo o un grupo determinado. Constituyen el punto de partida para la búsqueda de una solución pedagógica, capacitante, a fin de contribuir a la transformación cualitativa de los servicios de salud, y su oportuna identificación una trascendental herramienta de la educación permanente. Objetivo: identificar las necesidades de aprendizaje que sobre los trastornos del espectro autista, tienen los médicos que laboran en los Equipos de Atención Primaria de Salud, del municipio Playa. Método: se aplicó un cuestionario con carácter anónimo, en forma de examen escrito, a 20 especialistas de MGI seleccionados al azar, que laboran en tres policlínicas del extremo Este, del municipio Playa. Resultados: se puntualizaron las deficiencias e insuficiencias de los conocimientos y habilidades profesionales sobre los trastorno del espectro autista, fundamentalmente en lo que respecta a su detección temprana, diagnóstico precoz y escalas de evaluación psicoevolutiva. Conclusiones: a pesar de que los principales problemas de salud de nuestros niños y adolescentes constituyen, en el primer nivel de atención, programas priorizados, sobre todo los que a salud mental infanto-juvenil se refieren, la mayoría de los especialistas exhibió dificultades en el tratamiento integral de estos pacientes, persistiendo el espectro autista como un desorden habitualmente mal explorado y tardíamente diagnosticado, cuya evaluación adolece, en ocasiones, de elementos de obligatoria indagación y conocimiento, lo que afecta el adecuado seguimiento de los menores y su calidad de vida.

  2. Beneficios de la Terapia Asistida con Animales en el Trastorno del Espectro Autista

    OpenAIRE

    Ser Martín, Marta del

    2016-01-01

    La utilización de los animales con fines terapéuticos ha existido desde hace muchos años. En el presente Trabajo Fin de Grado se muestra una propuesta didáctica que pretende dar respuesta a las necesidades educativas de un grupo de alumnos con Trastorno del Espectro Autista pertenecientes a un medio rural, a través de una intervención innovadora, novedosa y motivadora: la Terapia Asistida con Animales. Los beneficios psicológicos, cognitivos, físicos, motores y socio-emocionale...

  3. Estrés parental e impacto familiar del trastorno del espectro autista: factores psicosociales implicados

    OpenAIRE

    Tijeras Iborra, María Amparo

    2017-01-01

    El Trastorno del Espectro Autista (TEA) constituye un diagnóstico encuadrado en el DSM-5 (APA, 2013) dentro de los trastornos del neurodesarrollo que se caracteriza fundamentalmente por la presencia de dificultades en la comunicación e interacción social, así como por la presencia de patrones repetitivos y restringidos de conductas, actividades e intereses. Tiene su inicio en la infancia, afecta a todas las áreas del desarrollo de la persona y sigue un patrón evolutivo diferente en cada caso,...

  4. Trastorno de espectro autista de alto funcionamiento y su relación con la familia

    OpenAIRE

    González Villafáñez, María Felisa

    2014-01-01

    El objetivo de este trabajo consiste en analizar las dificultades que tienen los adolescentes con Trastorno del Espectro Autista de Alto Funcionamiento (TEA-AF), en sus relaciones sociales y familiares. Este análisis ha requerido la revisión de las diversas definiciones y teorías explicativas del citado trastorno. A su vez también se describen las terapias conocidas hasta hoy para crear un programa de apoyo a los familiares (padres, hermanos, abuelos…) que se relacionan con dicho adolescente....

  5. AUTHIC: herramienta computacional para niños con espectro autista

    OpenAIRE

    Castillo Aguilar, Tayde A.; Pérez de Celis Herrero, Concepción; Lara Muñoz, Carmen; Somodevilla García, María J.; Pineda Torres, Ivo H.; Alba Aguilar, Karina F. de; Romero Romero, Erick

    2016-01-01

    [ES]El proyecto AUTHIC se enmarca en las denominadas Tecnologías de Ayuda y tiene como objetivo, desarrollar herramientas que auxilien a los niños con trastorno de espectro autista (TEA) a comprender y a interpretar las expresiones faciales asociadas a una emoción, mediante juegos interactivos supervisados por un terapeuta o sombra. Al tratarse de una investigación de carácter traslacional partimos de los hallazgos de las ciencias de la salud en la comprensión de la emoción y en l...

  6. Métodos de evaluación familiar: escolares con trastornos del espectro autista

    OpenAIRE

    Elena Benito Lara; Mª del Carmen Carpio de los Pinos

    2015-01-01

    Se aplican métodos de evaluación del funcionamiento del sistema familiar de escolares con trastorno del espectro autista: Escala de Cali- dad de Vida Familiar, Cuestionario de Crianza Parental y Cuestionario de Opinión de la Calidad de los Servicios Recibidos. Participaron volun- tariamente 12 familias. Con una metodología correlacional y descripti- va, se encuentra correlación significativa entre importancia de la calidad de vida familiar y la asunción del rol de ser padre. Mayor insatisfacc...

  7. Influencia del solvente en el espectro ultravioleta de nitro y amino bifenilos

    Directory of Open Access Journals (Sweden)

    María Cristina B. de Gómez

    2009-07-01

    Full Text Available Los nitro y amino bifenilos fueron sintetizados, caracterizados y usados como solutos, para determinarles su espectro U.V. Los solventes empleados corresponden a la serie de los alcoholes, como son: Metanol, Etanol, n- e iso-Propanol, n-, iso- y sec-Butanol. Se encontró que la posición de la banda de máxima absorción de cada una de las soluciones se relaciona tanto con las características del soluto como del solvente. Estos efectos se resumen en la ecuación de Rao (12, cuya aplicabilidad queda confirmada para este caso.

  8. Estrategias comunicativas en niños con trastorno del espectro del autismo

    OpenAIRE

    Muñumel Muñoz, Alba

    2017-01-01

    El presente Trabajo de Fin de Grado está centrado en la intervención educativa de un caso real de un niño de 4 años, que presenta Trastorno del Espectro del Autismo (TEA), en un aula de Educación Infantil en un centro rural. Se expone la comunicación utilizada con el niño TEA en las rutinas diarias del aula, utilizando para ello Sistemas Alternativos y Aumentativos de la comunicación (SAAC), totalmente validados para hacer posible la comunicación en niños con estas necesidades educativas ...

  9. NGC 2287: Un cúmulo abierto rico en binarias espectroscópicas de dos espectros

    Science.gov (United States)

    Levato, H.; Malaroda, S.; García, B.; Grosso, M.

    NGC 2287 contiene 100 estrellas con buena fotometría y 40 con tipos MK. En 1979 Levato et al., usando la técnica de la clasificación espectral, descubrieron que la mayoría de las estrellas en el rango B8-A0 eran binarias espectroscópicas con una inusual proporción de binarias con dos espectros. El presente proyecto tuvo el propósito de confirmar la naturaleza binaria de los miembros del cúmulo. Hemos obtenido espectros con resolución 14000 de 15 estrellas clasificadas como binarias. Los espectros, que abarcan la región λ 3500-λ 6000 Å, permitieron confirmar la naturaleza binaria de varias de las estrellas en la muestra. Hacemos notar el considerable interés astrofísico de este cúmulo abierto.

  10. Application of deconvolution techniques in X-ray spectra; Aplicacion de tecnica de deconvolucion en espectros de rayos X

    Energy Technology Data Exchange (ETDEWEB)

    Burgos Garcia, D.; Sancho Llerandi, C.; Saez Vergara, J. C.; Correa Garces, E.; Lanzas Sanchez, M. R.; Herbella Blazquez, M.

    2011-07-01

    The decay of Am-241, like that of Pu-239 is accompanied by the characteristic X-ray emission in this case, the Np-237. Being atomic number elements in a row, the X-ray emission of U (Z = 92) and Np (Z93) are very similar energies and thus inevitably overlapping photopeaks in the spectrum. This raises the question whether it is appropriate to try to separate their respective contributions in the spectrum, using spectral deconvolution techniques.

  11. Reutilización eficiente del espectro en redes celulares mediante optimización estocástica

    OpenAIRE

    Ayala Romero, José Antonio

    2015-01-01

    [SPA]Aproximadamente cada diez a~nos, una nueva tecnolog a celular es desarrollada y puesta en el mercado. Sin embargo, lo operadores se ven obligados a mantener sus redes antiguas debido a que no todos los usuarios migran a nuevas redes a la vez. Por tanto, el espectro asociado a esas redes antiguas cada vez est a m as infrautilizado. Usando t ecnicas de radio cognitiva, el operador puede permitir a los usuarios de las redes m as nuevas a reutilizar ese espectro. Se propone un e...

  12. Agendas visuales y procesos, elementos básicos en la vida del alumnado con Trastorno del Espectro del Autismo

    OpenAIRE

    Rodríguez Molino, Joana

    2014-01-01

    Este Trabajo Fin de Grado comienza haciendo un repaso de las definiciones y características asociadas a los Trastornos del Espectro del Autismo para poder considerar las pautas de intervención más acertadas a seguir con este alumnado. También se hace hincapié en los Sistemas Alternativos y Aumentativos de Comunicación como medio de comunicación y aprendizaje para estos niños/as. Se presenta una propuesta de intervención educativa llevada a cabo con un niño con Trastorno del Espectro del A...

  13. Interfaces naturales como factor de progreso cognitivo y social en personas que padecen Trastorno del Espectro Autista

    OpenAIRE

    Pons, Claudia; Contreras, Víctor; Zavala, Gonzalo; Fernández, Daniel; Holc, Matías; Passarelli, Cinthya

    2015-01-01

    El trastorno de espectro autista (TEA) es una alteración del desarrollo que se especifica por deficiencias cualitativas en la comunicación y en la interacción social, comportamiento caracterizado por patrones repetitivos y estereotipados. Los niños con trastorno del espectro autista (TEA), como también otros niños que no padecen este trastorno, presentan una característica bien definida por la aceptación a las Tecnologías de la Información y la Comunicación (TIC). Objetivo. Este proyecto t...

  14. EFECTIVIDAD DE LA MUSICOTERAPIA EN EL TRASTORNO DE ESPECTRO AUTISTA: ESTUDIO DE REVISIÓN

    Directory of Open Access Journals (Sweden)

    Marta Calleja-Bautista

    2016-05-01

    Full Text Available Este trabajo incluye una revisión de la literatura existente sobre intervenciones en musicoterapia en personas con Trastorno de Espectro Autista (TEA con el objetivo de analizar el grado de efectividad de estas intervenciones. Para llevar a cabo esta revisión, se realizó una búsqueda bibliográfica en las bases de datos pertinentes, y considerando los criterios de inclusión delimitados se incluyeron un total de 18 estudios, cuyos resultados han sido analizados. En 11 de las 18 intervenciones se obtienen mejoras estadísticamente significativas, mientras que en las 7 intervenciones restantes, o bien la mejoría no alcanza la significación estadística, o bien existe algún tipo de limitación en cuanto a la efectividad de la intervención en evaluaciones de seguimiento. Considerando estos resultados se concluye que la musicoterapia puede llegar a convertirse en una práctica prometedora para mejorar la comunicación e interacción social de las personas con TEA. Sin embargo, todavía es necesario un mayor volumen de investigación para aclarar qué tipo de intervenciones y en qué ámbitos del espectro autista en concreto son realmente eficaces estas intervenciones.

  15. POTENCIAL FISIOLÓGICO DE ESPÉCIES OLERÍCOLAS SUBMETIDAS A DIFERENTES ESPECTROS DE LUZ

    Directory of Open Access Journals (Sweden)

    Mauricio Ferrari

    2016-10-01

    Full Text Available O objetivo do trabalho foi avaliar o efeito de diferentes espectros de luz sobre o potencial fisiológico de espécies olerícolas. O experimento foi conduzido em delineamento inteiramente casualizado, no esquema fatorial três por cinco, com quatro repetições. As três espécies testadas foram alface (Lactuca sativa L., rúcula (Eruca sativa Mill. e couve chinesa (Brassica rapa var. pekinensis. Os cinco espectros de luz utilizados foram: vermelho, azul, amarelo, branco e ausência de luz. O teste de germinação foi conduzido em germinador tipo BOD, com temperatura constante de 25°C. Para a alface o espectro azul revela efeito negativo sobre as variáveis primeira contagem, percentual de germinação e comprimento de radícula. Para espécies de rúcula e couve chinesa, o espectro de luz vermelha e amarela apresentaram os melhores resultados para as variáveis estudadas.

  16. Inequality spectra

    Science.gov (United States)

    Eliazar, Iddo

    2017-03-01

    Inequality indices are widely applied in economics and in the social sciences as quantitative measures of the socioeconomic inequality of human societies. The application of inequality indices extends to size-distributions at large, where these indices can be used as general gauges of statistical heterogeneity. Moreover, as inequality indices are plentiful, arrays of such indices facilitate high-detail quantification of statistical heterogeneity. In this paper we elevate from arrays of inequality indices to inequality spectra: continuums of inequality indices that are parameterized by a single control parameter. We present a general methodology of constructing Lorenz-based inequality spectra, apply the general methodology to establish four sets of inequality spectra, investigate the properties of these sets, and show how these sets generalize known inequality gauges such as: the Gini index, the extended Gini index, the Rényi index, and hill curves.

  17. Crónicas del fin de la historia. En torno a Espectros de Manuel Vicent

    Directory of Open Access Journals (Sweden)

    Juan Antonio Ennis

    2008-11-01

    Full Text Available A pathway from the eighties to the end of the past century is drawn through the short texts integrated in Manuel Vincent’s Espectros (2000. The following essay deals with a reading of these writings from the point of view of the overflowing condition that the notion of ‘aura’ acquires in them, so as in other works of this author. This expansión of the notion of aura, is directly bond to a way of narrating History that is articulated by the writer’s gaze –a kind of look that turns every perception into an aesthetic one–, and makes one more fragmentary episode –told from the plural standpoint of experience, memory and sensorial sensitivity– out ofthe story of its end, during the last decades of the 20th century

  18. Una aproximación a las funciones ejecutivas en el trastorno del espectro autista

    OpenAIRE

    2011-01-01

    Introducción: La hipótesis psicológica de la disfunción ejecutiva desempeña un papel crucial para explicar el fenotipo conductual de las personas con trastornos del espectro autista (TEA), relacionada también con otras hipótesis como el déficit en teoría de la mente o la hipótesis de la coherencia central débil. Sin embargo, ninguna de estas hipótesis son mutuamente excluyentes y los comportamientos que tienen su origen en alguna de esas tres hipótesis están también moldeados y mantenidos por...

  19. O brincar e a relação objetal no espectro autístico

    Directory of Open Access Journals (Sweden)

    Ellen Fernanda Klinger

    2013-04-01

    Full Text Available Neste estudo foram investigados aspectos como o uso dos objetos e suas possibilidade de mudança em crianças do espectro autista em terapia fonoaudiológica de concepção Interacionista. Os sujeitos foram três meninos com diagnóstico de Transtorno Global do Desenvolvimento, suas mães e a fonoaudióloga. Filmaram-se as crianças durante a brincadeira livre no primeiro e décimo mês de terapia. Houve mudanças no brincar e no uso do objeto nos sujeitos. Conclui-se a efetividade da promoção do brincar em terapia, bem como que o conhecimento e a observação dos tipos de objeto e relação objetal é um importante indicador clínico.

  20. Comunicación y lenguaje en personas que se ubican dentro del espectro autista

    Directory of Open Access Journals (Sweden)

    Ronald Soto Calderón

    2007-01-01

    Full Text Available Una de las mayores dificultades de las personas que se ubican dentro del espectro autista, está relacionado con los elementos semántico pragmáticos de la comunicación, no obstante, quienes tienen relación con ellas en un afán de satisfacer sus necesidades procuran darle “entender lo que ellas dicen” sin tener en cuenta que muchas veces son meras interpretaciones propias, situación que afecta el desarrollo y utilización de un método o una estrategia de enseñanza del lenguaje y la comunicación a estas personas. Con este artículo se pretende realizar un corto recorrido por las características del lenguaje en personas con autismo, y algunos métodos que podrían favorecer el desarrollo de destrezas comunicativas en ellas.

  1. Una aproximación a las funciones ejecutivas en el trastorno del espectro autista

    OpenAIRE

    Paula Pérez, Isabel, 1970-; Martos, Juan

    2011-01-01

    Introducción: La hipótesis psicológica de la disfunción ejecutiva desempeña un papel crucial para explicar el fenotipo conductual de las personas con trastornos del espectro autista (TEA), relacionada también con otras hipótesis como el déficit en teoría de la mente o la hipótesis de la coherencia central débil. Sin embargo, ninguna de estas hipótesis son mutuamente excluyentes y los comportamientos que tienen su origen en alguna de esas tres hipótesis están también moldeados y mantenidos por...

  2. Espectro de radiación derivado de un modelo de colapso protoestelar

    Science.gov (United States)

    Coca, S.; Rohrmann, R.

    El exceso de emisión infrarroja en objetos protoestelares es atribuido usualmente a un disco de material en torno al cuerpo central. A pesar del avance alcanzado en la elaboración de modelos, aún existen dificultades para explicar la ley de temperatura del disco necesaria para reproducir las luminosidades y perfiles de energía observados. Nuestra propuesta consiste en determinar la distribución espectral de la radiación derivada de un particular modelo de colapso protoestelar, y estudiar la evolución del espectro desde estadíos tempranos de la contracción gravitatoria. Este plan es orientado a evaluar las propiedades del modelo (distribuciones de masa y temperatura del material circunestelar) por comparación con datos observacionales, a fin de inferir de ello los posibles ajustes requeridos en la teoría actualmente empleada.

  3. Propriedades psicométricas da Escala de Responsividade Social-2 para Transtornos do Espectro Autista

    Directory of Open Access Journals (Sweden)

    Izabela Guimarães Barbosa

    2015-09-01

    Full Text Available Objetivo O objetivo deste trabalho foi avaliar as propriedades psicométricas da versão em português da Escala de Responsividade Social-2 (ERS-2 para crianças e adolescentes com transtorno do espectro autista (TEA. Métodos A ERS-2 foi respondida pelos pais de 90 pacientes com TEA e 25 controles saudáveis. Análises quanto à validade discriminante, índices de confiabilidade e separação, de adequação e calibração dos itens pelo modelo Rasch foram realizadas. Resultados A ERS-2 demonstrou boa consistência interna (alfa de Cronbach = 0,952, um ponto de corte de 41, sensibilidade de 96,8%, especificidade de 100% e valor preditivo negativo de 99,9% para a identificação de TEA. As subescalas apresentaram, de forma geral, adequação ao modelo. No entanto, alguns itens se apresentaram pouco consistentes do ponto de vista estatístico (correlação item-total negativas e misfitting. O mapa de itens mostrou má cobertura da variável latente, especialmente no espectro mais leve do TEA. Conclusão Os resultados deste estudo mostraram que a versão em português da ERS-2 pode ser utilizada como ferramenta de triagem para o reconhecimento de TEA em crianças e adolescentes brasileiros. A escala pode ter versões futuras aprimoradas com a substituição dos itens com pior desempenho.

  4. Modelo animal no humano para transtornos del espectro autista, ansiedad y/o depresión

    OpenAIRE

    Lerma Gómez, Juan; Aller, María Isabel

    2015-01-01

    [ES] Modelo animal no humano para trastornos del espectro autista, ansiedad y/o depresión. La invención da a conocer un modelo de animal transgénico para los trastornos del espectro autista, ansiedad y/o depresión, que comprende de manera estable integrado en su genoma una secuencia de nucleótidos heteróloga que codifica la proteína GluK4, en el que dicha secuencia de nucleótidos se expresa en el cerebro anterior del animal. Por lo tanto, la invención se refiere a un método para generar este ...

  5. Imposição de taxas de utilização militar do espectro electromagnético

    OpenAIRE

    Mendes, Mário

    2009-01-01

    O espectro electromagnético é um bem finito e valioso, constituindo-se para os estados como um recurso natural. Importa explorar o mesmo de forma eficiente.O seu uso trás benefícios atavés do usofruto de serviços que dele fazem uso. Para além disso propicia a obtenção de mais-valias económicas para o Estado; directas, através da taxação ou indirectas, pela contribuição para uma economia saúdavel. As Forças Armadas fazem uso do espectro no desenvolvimento das suas actividades operacionias e...

  6. Modelo animal no humano para transtornos del espectro autista, ansiedad y/o depresión

    OpenAIRE

    Lerma Gómez, Juan; Aller, María Isabel

    2014-01-01

    Modelo animal no humano para trastornos del espectro autista, ansiedad y/o depresión. La invención da a conocer un modelo de animal transgénico para los trastornos del espectro autista, ansiedad y/o depresión, que comprende de manera estable integrado en su genoma una secuencia de nucleótidos heteróloga que codifica la proteína GluK4, en el que dicha secuencia de nucleótidos se expresa en el cerebro anterior del animal. Por lo tanto, la invención se refiere a un método para generar este model...

  7. Imposição de taxas de utilização militar do espectro electromagnético

    OpenAIRE

    Mendes, Mário

    2009-01-01

    O espectro electromagnético é um bem finito e valioso, constituindo-se para os estados como um recurso natural. Importa explorar o mesmo de forma eficiente.O seu uso trás benefícios atavés do usofruto de serviços que dele fazem uso. Para além disso propicia a obtenção de mais-valias económicas para o Estado; directas, através da taxação ou indirectas, pela contribuição para uma economia saúdavel. As Forças Armadas fazem uso do espectro no desenvolvimento das suas actividades operacionias e...

  8. La psicopatología del trastorno del espectro autista en perspectiva de segunda persona

    Directory of Open Access Journals (Sweden)

    Ana María Giraldo Giraldo

    2014-01-01

    Full Text Available Ha sido ampliamente estudiado, cómo el estudio de la psicopatología del trastorno del espectro autista (TEA tiene grandes consecuencias para algunas teorías de filosofía de la mente. Empero, no solo los estudios en psicología dejan huella en la filosofía, sino que también algunos estudios en filosofía surten efecto en la psicología. El caso que se presenta en este artículo es de doble vía. Por un lado, cómo la psicopatología del TEA obliga a la filosofía de la mente a repensar la vida mental y, por otro, cómo un cambio de perspectiva en la explicación de la interpretación psicológica, de la mano de Wittgenstein, obliga a la psicología a repensar la psicopatología del TEA.

  9. Autocuidado da criança com espectro autista por meio das Social Stories

    Directory of Open Access Journals (Sweden)

    Patricia Maria da Silva Rodrigues

    Full Text Available Resumo Objetivos: Aplicar o processo de enfermagem da teoria do autocuidado, de Dorothea Orem, e utilizar a Social Stories como ferramenta de aprendizagem aliada à teoria do autocuidado pela criança com Transtorno do Espectro Autista. Métodos: Estudo qualitativo, descritivo, caso único de uma criança com Síndrome de Asperger. Realizado no domicílio, fundamentado na teoria de Dorothea Orem, com utilização da Social Stories. Coleta de dados feita por meio de entrevistas semiestruturadas, anamnese e intervenções de enfermagem. Resultados: Realizaram-se três intervenções semanais para o estímulo ao autocuidado e avaliações com a mãe acerca da evolução da criança. Constatou-se a evolução da criança do sistema parcialmente compensatório para o sistema de apoio-educação, devido ao aumento da capacidade de autocuidado no banho, na escovação dos dentes e na higienização após as eliminações intestinais. Conclusão: A associação da teoria de Orem com a Social Stories apresentou-se como uma estratégia efetiva no estímulo ao autocuidado pela criança.

  10. CALIDAD DE VIDA EN PERSONAS CON TRASTORNO DEL ESPECTRO DEL AUTISMO

    Directory of Open Access Journals (Sweden)

    Coral García-Hortal

    2017-03-01

    Full Text Available El objetivo de este estudio es la aplicación de la Escala Kidslife (Gómez et al., 2016 en niños y adolescentes con diagnóstico de trastorno del espectro del autismo y discapacidad, y analizar la influencia de variables personales como edad, sexo, grado de discapacidad y necesidades de apoyo sobre su calidad de vida. Materiales y métodos. Se utiliza una metodología cuantitativa con una muestra intencionada de 35 participantes, pertenecientes a un “centro de educación especial”. La escala fue cumplimentada por personal de este centro. Resultados. La Escala Kidslife es útil para estudiar la calidad de vida en esta población, siendo significativas las variables personales entre las dimensiones de inclusión social, bienestar físico, bienestar material, bienestar emocional y relaciones interpersonales de calidad de vida. Conclusiones. Existe una diferencia de puntuación entre el personal de atención directa como los auxiliares y los profesionales como educadores, psicólogos, etc. Recomendaciones. Se sugiere la necesidad de realizar escalas que puedan ser autocumplimentadas por los propios participantes.

  11. Caracterización parcial y espectro antimicrobiano de substancias inhibitorias producidas por Alteromonas marinas

    Directory of Open Access Journals (Sweden)

    Jorge León

    2014-06-01

    Full Text Available Se caracterizan parcialmente substancias inhibitorias producidas por cepas marinas del género Alteromonas spp. Pruebas de precipitación de extractos crudos de sobrenadantes de las cepas N22.C y N11.6 con concentraciones saturantes de sulfato de amonio y filtrados en columnas de Sephadex G-25 muestran la producción de substancias inhibitorias (SI de naturaleza proteinácea. Otros ensayos de caracterización revelan que dichas substancias tienen un amplio espectro de actividad antibiótica frente a cepas de colección patógenas de peces, moluscos y crustáceos. Asimismo, muestran a las SI como termosensibles a 90oC en 45 min y con capacidad de mantener estabilidad inhibitoria dentro, del rango de pH de 3,0 a 9,0 hasta por 15 min. La actividad antibiótica de las substancias frente a Vibrio anguillarum NCMB 2133, V. anguillarum ATCC 19264 y Aeromonas salmonicida 67,79 fueron comparativamente equivalentes a 30 ppm del antibiótico oxitetraciclina (OTC.

  12. OS ARAUTOS DO EVANGELHO NO ESPECTRO CATÓLICO CONTEMPORÂNEO

    Directory of Open Access Journals (Sweden)

    Gizele Zanotto

    2011-05-01

    Full Text Available Este trabalho analisará a criação e inserção da Associação Internacional de Direito Pontifício Arautos do Evangelho no campo católico brasileiro. Os Arautos do Evangelho foram criados inicialmente como Associação Privada de Fiéis na Diocese de Campo Limpo/SP em 1999. A partir daí, a Associação se internacionalizou, se consolidou, foi legitimada pelo Vaticano, fundou institutos teológicos, colégios, sociedades de vida apostólica, evidenciando um forte apego à autocompreensão conservadora do catolicismo, marcante nos pontificados de João Paulo II e de Bento XVI. Partindo da constatação da variedade de novas formas de manifestações do catolicismo no mundo contemporâneo, pretendemos avaliar a importância deste grupo na contemporaneidade eclesial, bem como ponderar sobre as estratégias de saber/poder que mobilizaram visando sua legitimação no espectro católico.

  13. El espectro de KX TrA entre 1990 y 1996

    Science.gov (United States)

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

    La estrella simbiótica KX TrA = He2-177 fue observada espectroscópicamente con el telescopio de 2.15 m del CASLEO entre los años 1990 y 1996, utilizándose resoluciones intermedia y alta. El rango espectral estudiado se extiende desde 4400 Åa 7200 Å. La historia fotométrica de KX TrA presenta explosiones del mismo tipo que las mostradas por la nova lenta RR Tel y su espectro de alta excitación, muy rico en líneas de emisión, es también similar al de RR Tel. Por lo tanto, es importante analizar la evolución espectral de KX TrA en el tiempo, prestando especial atención a los posibles cambios en los niveles de excitación. Las emisiones presentes corresponden a transiciones permitidas y prohibidas con un amplio rango de ionización, incluyéndose las anchas e intensas líneas originadas por scattering Raman de O VI en λλ 6825 y 7082 Å. En el período cubierto por nuestras observaciones se estudia la variación de la intensidad relativa de las emisiones, el comportamiento de las velocidades radiales y los cambios de perfiles de las líneas, especialmente en Hα y Hβ. El contínuo de la región roja observada indica un tipo espectral no más tardío que M3 para la componente gigante fría del sistema.

  14. Presencia de beta-lactamasas de espectro extendido en dos hospitales de Lima, Perú

    Directory of Open Access Journals (Sweden)

    José-Luis Morales

    2005-03-01

    Full Text Available Objetivo: Estudiar la presencia de beta-lactamasas de espectro extendido (BLEE e identificar los tipos Temoniera (TEM y sulfidrilo variable (SHV producidas por cepas de Escherichia coli y Klebsiella pneumoniae en dos hospitales de Lima. Material y Métodos: La selección y confirmación de cepas productoras de BLEE se realizó mediante pruebas de susceptibilidad antimicrobiana, utilizando los criterios de la National Committee for Clinical Laboratory Standards (NCCLS; la identificación de los genes blaTEM y blaSHV se realizó mediante el análisis de la reacción en cadena de la polimerasa (PCR para su posterior secuenciamiento genético. Resultados: Se recolectó consecutivamente entre julio y septiembre de 2000, 137 cepas de Escherichia coli y 18 cepas de Klebsiella pneumoniae. La mayoría mostró alta resistencia a las cefalosporinas de tercera generación y aztreonam; 2,9% del total de E.coli y 44,4% del total de K.pneumoniae aisladas fueron confirmadas como productoras de BLEE. Todas las cepas productoras de BLEE fueron multirresistentes y la mayoría presentó co-resistencia a sulfametoxazol/trimetoprim, amikacina, gentamicina y ciprofoxacina. Se identificó la presencia del gen blaTEM en 4 cepas (3 K. pneumoniae y 1 E. coli y el gen blaSHV en 6 cepas (3 K. pneumoniae y 3 E. coli. El secuenciamiento de los correspondientes genes confirmó las BLEEs TEM-10 y SHV-5. Conclusión: Se demostró la presencia de BLEE tipo TEM y SHV, asociado a multirresistencia antibiótica.

  15. Comunicación y lenguaje en personas que se ubican dentro del espectro autista

    Directory of Open Access Journals (Sweden)

    Soto Calderón, Ronald

    2007-08-01

    Full Text Available Resumen: Una de las mayores dificultades de las personas que se ubican dentro del espectro autista, está relacionado con los elementos semántico pragmáticos de la comunicación, no obstante, quienes tienen relación con ellas en un afán de satisfacer sus necesidades procuran darle “entender lo que ellas dicen” sin tener en cuenta que muchas veces son meras interpretaciones propias, situación que afecta el desarrollo y utilización de un método o una estrategia de enseñanza del lenguaje y la comunicación a estas personas. Con este artículo se pretende realizar un corto recorrido por las características del lenguaje en personas con autismo, y algunos métodos que podrían favorecer el desarrollo de destrezas comunicativas en ellas.Abstract: One of the biggest difficulties that lie in to the autistic spectre, is related to the semantic pragmatic elements of communication, nevertheless, those who are related to those fundamentals of communication, in the need to satisfy their needs procure giving “understanding to what they say” without realizing that most times those are nothing but insightful interpretations, which affect the development and method employment or a language teaching strategy and communication of such people. This article is intended to take a short look into the language characteristics from people with autism and some methods that might favour their communication skills development.

  16. Transtornos do Espectro Autista e sexualidade: um estudo de caso na perspectiva do cuidador

    Directory of Open Access Journals (Sweden)

    Rafael De Tilio

    2017-06-01

    Full Text Available Los Trastornos del Espectro Autista (TEA son un grupo de trastornos del neurodesarrollo que afecta, entre otros aspectos la interacción social y la comunicación. La rutina y dinámica familiar de los portadores de TEA son afectados y, a veces, sus familiares/cuidadores no reconocen sus posibilidades de desarrollo (biológico y psicológico, incluyendo su sexualidad que pasa a ser infantilizada, negada o rechazada. El objetivo de esta investigación fue pesquisar como un cuidador comprende un individuo con TEA, específicamente en la vivencia de su sexualidad. Los datos fueron obtenidos por medio de una entrevista semiestructurada, gravada y transcripta integralmente con la hermana cuidadora de un adulto de 35 años, diagnosticado a menos de una década. Después de un análisis de contenido temático los resultados mostraron que hay una aceptación parcial de la sexualidad de aquel individuo por sus familiares (respeto por su privacidad y masturbación al mismo tiempo en que hay muchos conflictos (vergüenza, miedo de comportamientos hipersexualizados no adecuados en público; mas allá de eso, la cuidadora o familiares no recibieron formación especializada para cuidar de acometidos por TEA, lo que aumenta las dificultades. En este sentido, y delante de esta tención, se refuerza la importancia de más acciones educativas en cuidados en salud y educación y de investigaciones entre sexualidad, familia, TEA y cuidados que busquen la consolidación de derechos (sexuales y reproductivos de estos sujetos.

  17. A aplicação da musicoterapia numa criança com espectro do Autismo : estudo de caso

    OpenAIRE

    Azevedo, Juliana Celina Janela de

    2012-01-01

    O nosso estudo pretende argumentar a aplicabilidade da Musicoterapia em crianças com Espectro do Autismo, considerando-a como um meio facilitador de socialização e integração e contribuindo para a reabilitação psicossocial destas crianças. Refletindo sobre uma breve visão histórica desta terapia, e ponderando o trabalho de um musicoterapeuta, é nosso objetivo perceber de que forma a Musicoterapia promove o desenvolvimento físico, mental, social e cognitivo nas crianças com P...

  18. VARIACIÓN INTRANUAL EN EL ESPECTRO POLÍNICO DE LA MIEL PRODUCIDA EN HUARÁN (CUSCO, PERÚ)

    OpenAIRE

    Yuca-Rivas, Raúl; Sociedad Botánica del Cusco, Facultad de Ciencias, Universidad Nacional de San Antonio Abad del Cusco, Ciudad Universitaria, Av. De la Cultura s/n, Cusco, Perú.

    2016-01-01

    Con el fin de determinar cómo varía el espectro polínico de la miel, obtenida en colmenares ubicados en la localidad de Huarán, Cusco, durante la temporada apícola 2012 – 2013, e identificar las fuentes de polen y néctar usadas por Apis mellifera L., se analizaron en total 75 muestras de miel procedentes de 15 colmenas, en las que se realizaron cosechas sucesivas correspondientes a 5 periodos bimestrales de la temporada apícola: periodo I (julio – agosto 2012), periodo II (setiembre – octubre...

  19. Software educativo para la enseñanza de competencias emocionales en alumnado con trastornos del espectro autista

    OpenAIRE

    Josefina Lozano Martínez; Salvador Alcaraz García

    2011-01-01

    En este artículo se valora un proceso de enseñanza de competencias emocionales que utiliza un software educativo para alumnado con trastornos del espectro autista. Dos alumnos con trastorno autista y dos con síndrome de Asperger de educación primaria y secundaria participaron en un diseño de investigación colaborativa entre docentes universitarios y no universitarios a lo largo de dos cursos académicos. Tras el proceso de enseñanza, los alumnos mejoraron su rendimiento para superar tareas ...

  20. TECNOLOGIAS MÓVEIS NA INCLUSÃO ESCOLAR E DIGITAL DE ESTUDANTES COM TRANSTORNOS DE ESPECTRO AUTISTA

    Directory of Open Access Journals (Sweden)

    Lucila Maria Costi SANTAROSA

    2015-12-01

    Full Text Available RESUMO Com foco nas políticas públicas inclusivas, a relação entre estudantes com Transtorno de Espectro Autista e dispositivos móveis foi problematizada para discutir os limites e as possibilidades da configuração tecnológica 1:1 em apoiar processos de inclusão escolar e digital na rede pública brasileira de ensino. Metodologicamente, caracteriza-se como uma pesquisa qualitativa de enfoque exploratório e explicativo, epistemologicamente apoiada na teoria sócio-histórica e conduzida por dois grandes questionamentos: (i Os dispositivos móveis apresentam interface acessível a sujeitos com Transtornos de Espectro Autista? (ii Que movimentos foram desencadeados pela mediação dos dispositivos móveis para potencializar a inclusão sociodigital de sujeitos com Transtornos de Espectro Autista? A partir dos dados coletados foi possível analisar as fragilidades e as potencialidades da interação de três sujeitos de pesquisas, estudantes dos anos iniciais da Educação Básica em processo de alfabetização, pela interface da tecnologia móvel. O comportamento refratário dos sujeitos de pesquisa em relação ao laptop educacional pode ser justificado pelos problemas de acessibilidade tecnológica associada ao dispositivo móvel, muitos deles potencializados pelas especificidades do Transtorno de Espectro Autista: interface pouco amigável, de difícil compreensão pelo grau de abstração e pela complexidade do sistema operacional, com suas múltiplas escolhas e configurações. Na interação com o tablet foi possível constatar um manuseio amigável e intuitivo, pois a manipulação com o objeto ocorre de forma direta e natural, com o toque do dedo. A arquitetura dessa tecnologia permite seu uso em diferentes lugares e posições, uma resposta positiva à hiperatividade e para qualificar estratégias de mediação pedagógica.

  1. Enseñar emociones para beneficiar las habilidades sociales de alumnado con trastornos del espectro autista

    OpenAIRE

    Lozano Martínez, Josefina; Alcaraz García, Salvador

    2010-01-01

    Esta investigación trata de valorar si a través de un proceso de enseñanza-aprendizaje de la comprensión de emociones y creencias con alumnado con trastornos del espectro autista (TEA) se puede mejorar dicha capacidad que implique, además, cambios positivos en sus habilidades sociales. Para ello, dos alumnos de educación primaria y una alumna de educación secundaria con TEA participaron en un diseño de estudio de casos donde, para la obtención de datos, se diseñaron y elaboraron materiale...

  2. Las habilidades sociales en alumnos con trastorno del espectro autista de grado uno: propuesta de intervención

    OpenAIRE

    López Díez, Rebeca

    2016-01-01

    El trastorno del espectro autista (TEA) de grado uno presenta unas características específicas como es el déficit en las habilidades sociales. Este trabajo tiene como objetivo desarrollar una propuesta de intervención sobre el desarrollo de las habilidades sociales en niños con TEA que se encuentran escolarizados en un centro ordinario, en el primer interciclo de Educación Primaria. Para su diseño se realiza una búsqueda de información sobre contenidos de las habilidades sociales y cuáles son...

  3. Aportación al análisis de espectros de radiación: estructuras y algoritmos

    OpenAIRE

    Díaz Martín, Juan Carlos

    2015-01-01

    A lo largo del presente trabajo se investiga la viabilidad de la descomposición automática de espectros de radiación gamma por medio de algoritmos de resolución de sistemas de ecuaciones algebraicas lineales basados en técnicas de pseudoinversión. La determinación de dichos algoritmos ha sido realizada teniendo en cuenta su posible implementación sobre procesadores de propósito específico de baja complejidad. En el primer capítulo se resumen las técnicas para la detección y ...

  4. Modelo de gestión del espectro radioeléctrico: un enfoque basado en procesos

    OpenAIRE

    Ramírez Tamayo, Anrdés Felipe; Betancourt Guzmán, María de los Ángeles

    2012-01-01

    Con el auge de las Tecnologías de la Información y las Comunicaciones, y la dependencia cada vez mayor del acceso a servicios y aplicaciones relacionados con estas tecnologías, la demanda por infraestructuras que soporten los servicios y aplicativos ha experimentado un crecimiento casi exponencial durante las últimas dos décadas. En el caso de los servicios móviles, el acceso está determinado por la disponibilidad del espectro radioeléctrico y no son pocos los interesados en alcanzar un segme...

  5. Atribución inequívoca de las señales de RMN de un neolignano arilnaftalénico utilizando espectros bidimensionales

    Directory of Open Access Journals (Sweden)

    Juan C. Martínez V.

    2010-05-01

    Full Text Available La atribución sin ambigüedad de cada una de las señales de los espectros de RMN 1H y 13C del 2,3-dimetil-7-hidroxi-6-metoxi-1-(3', 4' - metilenodioxifenil naftaleno, fue realizada por medio de sus espectros bidimensionales de correlación homonuclear 1H-1H y de correlación heteronuclear 1C y 3H obtenido utilizando en la respectiva secuencia de pulsos tiempos de espera correspondientes

  6. Estudio teórico - práctico de los mecanismos de comercio automático de espectro radioeléctrico

    OpenAIRE

    López Martínez, Mario

    2012-01-01

    [SPA]El incremento de la demanda de comunicaciones inalámbricas frente a un estático espectro radioeléctrico con el que hacerle frente ha terminado con éste casi asignado por completo, que no ocupado: la solución pasa por utilizarlo de forma más eficiente y uno de los mecanismos planteados es el comercio automático de espectro: hacer posible que los operadores con licencia alquilen porciones a otros para satisfacer demandas de usuarios en tiempo real en un mercado secundario, q...

  7. Estudio del impacto de un mercado secundario del espectro electromagnético en Colombia bajo el aspecto técnico y de las medidas regulatorias

    OpenAIRE

    Álvarez Jiménez, Johanna Paola

    2015-01-01

    Han sido diversos los motivos que han impulsado los avances tecnológicos en el uso del espectro radioeléctrico y la optimización de este recurso. Con la aparición de nuevos servicios y conceptos como: movilidad, ubicuidad, convergencia y tecnologías de la información se genera una elevada demanda espectral que pone en discusión el modelo de gestión administrativo, observándose la adopción de alternativas para la administración de este espectro orientadas a mecanismos de mercado. Algunos ...

  8. Estimulación del lenguaje oral en el trastorno del espectro autista. Una propuesta educativa basada en el método TEACCH

    OpenAIRE

    2016-01-01

    Este trabajo fin de grado titulado “Estimulación del lenguaje oral en el trastorno del espectro autista. Una propuesta educativa basada en el método TEACCH”, es una propuesta educativa de estimulación del lenguaje oral dirigida a niños de 5 años diagnosticados con Trastorno del Espectro Autista y escolarizados en un centro ordinario. Estos tienen problemas graves para comunicarse con las personas de su alrededor y también en las relaciones sociales. Por ello he diseñado un programa de interve...

  9. CARACTERÍSTICAS PERINATAIS DE CRIANÇAS COM TRANSTORNO DO ESPECTRO AUTISTA

    Directory of Open Access Journals (Sweden)

    Gabriela Foresti Fezer

    Full Text Available RESUMO Objetivo: Analisar características perinatais de crianças com transtorno do espectro autista (TEA. Métodos: Revisão retrospectiva dos prontuários medicos de 75 crianças com TEA, entre janeiro de 2008 e janeiro de 2015. Os critérios de inclusão foram o diagnóstico de TEA baseado no DSM-5 e o termo de consentimento assinado pelo responsável legal. O critério de exclusão foi ausência de todos os dados no prontuário médico. As variáveis analisadas foram: idade materna, prematuridade (idade gestacional menor que 37 semanas, baixo peso ao nascer (<2.500 g e asfixia perinatal (Apgar menor que 7 no quinto minuto. Os dados foram avaliados por meio do teste de diferença entre as proporções (nível de significância de p<0,05. Resultados: Setenta e cinco pacientes foram incluídos no estudo. A idade materna variou de 21,4 a 38,6 anos (29,8±4,1 anos. O parto prematuro ocorreu em 14 (18,7% pacientes, asfixia perinatal em 6 (8,0% e baixo peso ao nascer em 32 (42,6%. As prevalências de prematuridade, asfixia perinatal e baixo peso ao nascer entre as crianças com TEA neste estudo foram maiores do que as prevalências gerais dessas condições entre todos os nascidos vivos em nosso país, região e estado, as quais são, respectivamente, 11,5, 2,3 e 8,5% no Brasil, 11,0; 2,2 e 8,5% na região Sul e 10,5, 2,0 e 8,4% no estado do Paraná. Conclusões: Nossos achados mostraram maior prevalência de prematuridade, baixo peso ao nascer e asfixia perinatal em crianças com TEA. Algumas limitações são o desenho retrospectivo do estudo e a amostra de pequeno tamanho. Grandes estudos prospectivos são necessários para esclarecer a possível associação entre intercorrências perinatais e TEA.

  10. Tipo de ecolalia em crianças com Transtorno do Espectro Autista

    Directory of Open Access Journals (Sweden)

    Marina Mergl

    2015-12-01

    Full Text Available RESUMO: O Transtorno do Espectro Autista (TEA é uma síndrome caracterizada por prejuízos persistentes na comunicação social recíproca, com interação social restrita e padrões repetitivos de comportamentos, interesses e atividades. Os comportamentos repetitivos na linguagem podem manifestar-se pelo aparecimento da ecolalia, fenômeno persistente caracterizado como um distúrbio de linguagem, com repetição da fala do outro, dividida em imediata ou tardia. Teve como objetivo a verificação do tipo de ecolalia e das habilidades comunicativas em sete meninos com TEA, com idades entre quatro e sete anos, que fazem uso da comunicação oral. Foram realizadas duas atividades distintas: avaliação das crianças em uma sessão de atendimento fonoaudiológico em situação lúdica, analisada pelo Protocolo de Observação Comportamental e aplicação de um questionário com os pais e profissionais para verificar suas opiniões quanto ao uso, tipo e frequência de ecolalia. Das sete crianças do estudo, seis apresentaram ecolalia imediata e uma tardia; a criança que utilizou ecolalia tardia apresentou menor pontuação no protocolo de observação comportamental, porém para os demais sujeitos não houve relação direta entre o tipo e número de ecolalia com a pontuação. O questionário aplicado com pais e profissionais mostrou concordância quanto à presença da ecolalia. As crianças com TEA deste estudo apresentaram habilidades comunicativas e aspectos do desenvolvimento cognitivo comprometidos e maior número de ecolalias imediatas. Estudos com o tema ecolalia ainda são escassos na literatura nacional. Este relato de casos clínicos pode contribuir para futuras pesquisas sobre a caracterização da linguagem em crianças com TEA e conduta terapêutica dos fonoaudiólogos.

  11. LICITACIÓN DEL ESPECTRO RADIOELÉCTRICO Y SU EFECTO EN EL BIENESTAR SOCIAL EN MÉXICO

    Directory of Open Access Journals (Sweden)

    Brasil Acosta

    2013-01-01

    Full Text Available En 2010 la Comisión Federal de Telecomunicaciones realizó las Licitaciones 20 (30MHz en la banda de 1.9GHz y 21 (90MHz en la banda de 1.7-2.1GHz con el objetivo de afectar positivamente la cobertura, la calidad, la competencia y la inver-sión en el sector. Estas licitaciones se instrumentaron simultáneamente mediante el inicio de un procedimiento de audiencias comparadas, seguidas por una subasta de precio ascendente, con topes de acumulación de espectro. Las ganancias fueron i incremento de 55.0% en el promedio de tenencia de espectro; ii reducción de 14.3% en las asimetrías entre operadores por región; iii el total pagado en la subasta más las obligaciones de pagos futuros asciende a 28 871 millones de pesos (2 309 mi-llones de dólares, y iv por cada peso que ingresa al Estado se genera una ganancia de 8.8 pesos en excedente del consumidor. Finalmente, si se revierte la decisión, se genera una pérdida en bienestar entre 24 170 y 35 001 millones de pesos.

  12. Reactor Neutrino Spectra

    OpenAIRE

    Hayes, A. C.; Vogel, Petr

    2016-01-01

    We present a review of the antineutrino spectra emitted from reactors. Knowledge of these spectra and their associated uncertainties is crucial for neutrino oscillation studies. The spectra used to date have been determined either by converting measured electron spectra to antineutrino spectra or by summing over all of the thousands of transitions that make up the spectra, using modern databases as input. The uncertainties in the subdominant corrections to β-decay plague both methods, and we ...

  13. Algunos aspectos del espectro Autista. Un trastorno inusitadamente frecuente y doloroso.

    Directory of Open Access Journals (Sweden)

    Daniel Jácome Roca

    2008-07-01

    Full Text Available

    El autismo (o espectro autista es un desorden neuro-conductual –hereditario y heterogéneo-
    del desarrollo del cerebro, que comienza en niños menores de tres años de edad y que deteriora
    su comunicación e interacción social causando un comportamiento restringido y repetitivo. Pueden jugar
    un papel en estos síndromes, algunas anormalidades cromosómicas. Las soluciones ni son simples ni
    uniformes en los diferentes síndromes, que algunas veces se asocian con patologías conocidas como el
    síndrome de Down, rubéola congénita, síndromes de Rett o de la X frágil, embriopatía por valproato, etc.
     
    Para hacer un diagnóstico de autismo, el DSM-IV –de la Asociación Americana de Psiquiatría- indica que es necesario encontrar las siguientes características:
    A. Un total de seis o más manifestaciones de (1, (2 y (3, con l menos dos de (1, al menos una
    de (2, y al menos una de (3.
    1. Trastorno cualitativo de la relación, expresado como mínimo en dos de las siguientes manifestaciones:
    a. Trastorno importante en muchas conductas de relación no verbal, como la mirada a los ojos, la
    expresión facial, las posturas corporales y los gestos para regular la interacción social.
    b. Incapacidad para desarrollar relaciones con iguales adecuadas al nivel de desarrollo.
    c. Ausencia de conductas espontáneas encaminadas a compartir placeres

  14. El uso de la musicoterapia para la mejora de la comunicación de niños con Trastorno del Espectro Autista en Aulas Abiertas Especializadas

    National Research Council Canada - National Science Library

    Talavera Jara, Paloma Del Rocío; Gértrudix Barrio, Felipe

    2016-01-01

    ... mejoras aporta la musicoterapia al desarrollo de la comunicación en los alumnos con Trastorno del Espectro Autista dentro de las Aulas Abiertas de los CEIPs de Castilla-La Mancha y la Comunidad Autónoma de Madrid...

  15. Estudio de un brote intrahospitalario por Salmonella typhimurium productora de beta-lactamasa de espectro extendido SHV-5

    Directory of Open Access Journals (Sweden)

    Liliana Del Pozo

    2006-10-01

    Full Text Available Antecedentes: Presencia de un brote intrahospitalario de Salmonella typhimurium productora de beta-lactamasas de espectro extendido ocurrido en el Hospital San Bartolome, entre el 17 de febrero y el 6 de marzo del año 2001. Objetivo: Identificar los mecanismos implicados en la transmisión de Salmonella typhimurium y caracterización de los genes asociados a la resistencia en beta-lactámicos. Diseño: Estudio clínico-bacteriológico retrospectivo. Lugar: Hospital Nacional Docente Madre Niño (Honadomani San Bartolomé. Materiales biológicos: Aislamientos bacterianos provenientes de pacientes lactantes. Intervenciones: Se determinó la diversidad genética de cinco aislamientos bacterianos provenientes de pacientes lactantes hospitalizados en la Unidad pediátrica del hospital, utilizando REP-PCR y fingerprint plasmídico. Previamente, se caracterizó la resistencia antimicrobiana, determinando la presencia de beta-lactamasa de espectro extendido mediante la prueba de sinergia de doble disco; la variante fue identificada por PCR-secuenciamiento del gen bla shv . Principales medidas de resultados: Presencia de genotipos, plásmidos y beta-lactamasa de Salmonella typhimurium. Resultados: Se determinó la presencia de dos genotipos en los aislamientos de Salmonella typhimurium; el caso índice (sensible presentó un genotipo diferente al de otros aislamientos resistentes pertenecientes a pacientes hospitalizados. Se determinó la presencia en S. typhimurium de un plásmido de peso molecular elevado de tamaño distinto a los de K. pneumoniae, pero probablemente relacionado con una cepa de E. coli intrahospitalaria. Se encontró la beta-lactamasa de espectro extendido SHV-5 en los aislamientos de S. typhimurium y E. coli. Conclusiones: El estudio sugiere que la diseminación de estas bacterias en los lactantes puede haber sido favorecida por varios factores que habrían intervenido en la transferencia de elementos genéticos responsables de la

  16. Espectro de gotas de pulverização e controle da ferrugem-asiática-da-soja em cultivares com diferentes arquiteturas de planta

    Directory of Open Access Journals (Sweden)

    Mônica Paula Debortoli

    2012-07-01

    Full Text Available O objetivo deste trabalho foi determinar o espectro de gotas de pulverização ideal para o controle da ferrugem-asiática-da-soja (Phakopsora pachyrhizi, em cultivares com diferentes arquiteturas de planta. O experimento foi conduzido na safra de 2009/2010. A aplicação de fungicida (piraclostrobina + epoxiconazol, com óleo mineral foi avaliada com quatro espectros de gotas de pulverização - muito fino, <119 μm; fino, 119 a 216 μm; médio, 217 a 352 μm; e grosso, 353 a 464 μm -, em quatro cultivares de soja (BMX Apollo RR, NA 7636 RR, Fcep 53 RR e TMG 4001 RR contrastantes quanto a índice de área foliar, estatura de plantas e número de ramos por planta. Foram quantificadas as variáveis: número de gotas por cm², diâmetro mediano volumétrico das gotas, área abaixo da curva de progresso da ferrugem-asiática e produtividade da soja. A definição do espectro de gotas a ser utilizado deve considerar a cultivar e as condições ambientais em que a pulverização será realizada. A magnitude da proteção exercida pelo fungicida varia de acordo com a cobertura de plantas e a penetração de gotas no dossel, proporcionada pelos diferentes espectros de gota. O espectro de gotas fino proporciona boa deposição de gotas, controle da doença e produtividade, independentemente da cultivar avaliada.

  17. Factores que condicionan el espectro de distribución del matorral mediterráneo de la Sierra de Grazalema, sur de España

    Directory of Open Access Journals (Sweden)

    Gallego Fernández, Juan Bautista

    2004-06-01

    Full Text Available The biogeographical pattern of woody plant communities after human disturbance cessation was studied at Grazalema Mountains. The sampling included 137 transects, with different communities of Mediterranean shrubland and a total of 74 species. Species richness and chorological composition -species number and relative cover of each chorological type- were analyzed at each transect considering the altitude range, soil pH -acid or basic- and human disturbance before the legal protection of the areas as natural reserve. Results show site differences on species richness and distribution spectra of communities in relation to altitude and pH. Beside these natural patterns, and superposed to them, human disturbance has played an important role in present biogeographical composition of Mediterranean shrubland communities in Grazalema mountains. To discuss human disturbance influence, we have considered the different regenerative strategies of species belonging to each chorological type.Se ha estudiado el patrón biogeográfico de comunidades de plantas leñosas tras el cese de la perturbación humana en la Sierra de Grazalema. Se han muestreado 137 transectos de vegetación de diferentes comunidades de matorral mediterráneo, donde se han identificado 74 especies. Se ha analizado en cada transecto la riqueza de especies y la composición corológica -número de especies y porcentaje de cobertura de cada tipo corológico- en función de la altitud, del tipo de pH del suelo -ácido o básico- y del tipo de perturbación humana existente antes de la declaración de la zona como área de reserva. Los resultados indican que existen diferencias en el número de especies y en el espectro de distribución de comunidades de matorral debido a diferencias en altitud y en los tipos de suelo (ácido o básico en el que se desarrollan las comunidades, y que superpuesto a este patrón natural, la intervención humana ha tenido un papel determinante en la composici

  18. SOFTWARE EDUCATIVO PARA LA ENSEÑANZA DE COMPETENCIAS EMOCIONALES EN ALUMNADO CON TRASTORNOS DEL ESPECTRO AUTISTA

    Directory of Open Access Journals (Sweden)

    Josefina Lozano Martínez

    2011-01-01

    que utiliza un software educativo para alumnado con trastornos del espectro autista. Dos alumnos con trastorno autista y dos con síndrome de Asperger de educación primaria y secundaria participaron en un diseño de investigación colaborativa entre docentes universitarios y no universitarios a lo largo de dos cursos académicos. Tras el proceso de enseñanza, los alumnos mejoraron su rendimiento para superar tareas que evalúan la capacidad de reconocer y comprender emociones. Estos resultados pueden ser explicados por la organización del contenido, la presentación de las tareas y la estimulación y motivación que proporciona el uso del software educativo en la intervención educativa con alumnado con TEA.

  19. Presencia de B-lactamasas de espectro extendido en enterobacterias aisladas de casos de infección nosocomial

    Directory of Open Access Journals (Sweden)

    Sergio Pavón Romero

    2011-01-01

    Full Text Available Las enterobacterias son los microorganismos etiologicos mas frecuentemente asociados a las infecciones nosocomiales (in, caracterizandose por su alta resistencia a los antibioticos B-lactamicos, mediada por la produccion de B-lactamasas de Espectro Extendido (blee. Su uso excesivo aumenta la seleccion de cepas multirresistentes, favoreciendo su propagacion e incremento de las complicaciones de casos de in. En algunos casos las cepas productoras de blee presentan resistencia adicional a aminoglucosidos, quinolonas, tetraciclinas y trimetoprim-sulfametoxazol, reduciendo las opciones terapeuticas de las in. Con la finalidad de conocer localmente la magnitud de este problema, se estudiaron 87 cepas de enterobacterias aisladas de casos de in, encontrandose que el 26.43% son productoras de blee y en este caso fenotipicamente multirresistentes.

  20. Relação entre hábito alimentar e síndrome do espectro autista

    OpenAIRE

    Nádia Isaac da Silva

    2011-01-01

    O autismo é uma síndrome que afeta todas as áreas do comportamento humano. Sua etiologia não está definida. Os estudos descreveram uma associação do autismo com diversas anormalidades fisiológicas entre elas, distúrbios relacionados ao metabolismo proteico. A teoria do excesso de peptídeos opioides afirma que o consumo de glúten e caseína pode intensificar o comportamento da síndrome do espectro autista. Outra hipótese é de que distúrbios do metabolismo da creatina também estão integrados à d...

  1. Equipo para la Determinación Experimental del Espectro de Luz Difundida por un Líquido Experimental Equipment for the Determination of Light Scattering Spectrum of Liquids

    OpenAIRE

    Arsuaga, J. M.; J.E.F Rubio; M Taravillo; M Cáceres

    2004-01-01

    El objetivo del trabajo es la descripción de un equipo experimental que permite obtener el espectro de luz difundida por un líquido, tanto polarizada como despolarizada, a temperaturas entre 288 y 368 K. El análisis de los espectros se realiza utilizando una técnica interferométrica. Se describen, en primer lugar, los elementos esenciales del equipo, así como el procedimiento utilizado para obtener el espectro experimental. El buen funcionamiento del equipo experimental ha sido comprobado mid...

  2. Medición, Caracterización y Modelamiento del Rango de Frecuencias Asignado a un Servicio Fijo- Móvil (2110-2500MHZ) de la Banda UHF del Espectro Electromagnetico en la FIEC, Campus Prosperina

    OpenAIRE

    Alvarado Ramirez, Christian Cesar; Zamora Flores, Gabriel Andres

    2015-01-01

    Este trabajo abarca una investigación sobre la ocupación del Espectro Electromagnético en el rango de frecuencias de 2110 - 2500MHz en el área de la FIEC, ubicada en el Campus Gustavo Galindo, Km 30.5 Vía Perimetral en la ciudad de Guayaquil. El Espectro Electromagnético es un recurso natural limitado y considerado por parte del estado ecuatoriano como un sector estratégico, por lo cual una óptima utilización del espectro garantiza poder proveer un mayor número de servicios de telecomunicacio...

  3. Análisis de la naturaleza jurídica de las contraprestaciones económicas por la explotación de recursos naturales: Caso del Canon por Uso del Espectro Radioeléctrico

    OpenAIRE

    Aparicio Zavaleta, Edgar Raúl

    2015-01-01

    El presente trabajo busca evaluar y analizar la regulación de las contribuciones que son aportadas por los operadores de telecomunicaciones por el uso del espectro radioeléctrico, el denominado canon por uso del espectro radioeléctrico. El trabajo se inicia con la descripción del espectro radioeléctrico, el cual es el medio natural que brinda el soporte para establecimiento de las comunicaciones inalámbricas, al conducir las señales electromagnéticas emitidas entre los equipos electrónicos de...

  4. Medición, Caracterización y Modelamiento del Rango de Frecuencias Asignado a un Servicio Fijo- Móvil (2110-2500MHZ) de la Banda UHF del Espectro Electromagnetico en la FIEC, Campus Prosperina

    OpenAIRE

    Alvarado Ramirez, Christian Cesar; Zamora Flores, Gabriel Andres

    2015-01-01

    Este trabajo abarca una investigación sobre la ocupación del Espectro Electromagnético en el rango de frecuencias de 2110 - 2500MHz en el área de la FIEC, ubicada en el Campus Gustavo Galindo, Km 30.5 Vía Perimetral en la ciudad de Guayaquil. El Espectro Electromagnético es un recurso natural limitado y considerado por parte del estado ecuatoriano como un sector estratégico, por lo cual una óptima utilización del espectro garantiza poder proveer un mayor número de servicios de telecomunicacio...

  5. Principal component analysis of NEXAFS spectra for molybdenum speciation in hydrotreating catalysts; Analise por componentes principais de espectros nexafs na especiacao do molibdenio em catalisadores de hidrotratamento

    Energy Technology Data Exchange (ETDEWEB)

    Faro Junior, Arnaldo da C.; Rodrigues, Victor de O.; Eon, Jean-G., E-mail: farojr@iq.ufrj.b [Universidade Federal do Rio de Janeiro (IQ/UFRJ), RJ (Brazil). Inst. de Quimica; Rocha, Angela S. [Universidade Federal do Rio de Janeiro (COPPE/UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-Graduacao de Engenharia

    2010-07-01

    Bulk and supported molybdenum based catalysts, modified by nickel, phosphorous or tungsten were studied by NEXAFS spectroscopy at the Mo L{sub III} and L{sub II} edges. The techniques of principal component analysis (PCA) together with a linear combination analysis (LCA) allowed the detection and quantification of molybdenum atoms in two different coordination states in the oxide form of the catalysts, namely tetrahedral and octahedral coordination. (author)

  6. Reconstruction of Spectra Using X-ray Flat Panel Detector; Reconstruccion de Espectros de Rayos X Utilizando un Detector Flat Panel

    Energy Technology Data Exchange (ETDEWEB)

    Gallardo, S.; Querol, A.; Pozuelo, F.; Juste, B.; Rodenas, J.; Verdu, G.

    2013-07-01

    In this work, we used a flat panel detector with a wedge of PMMA for absorbed dose curve for given working conditions of X-ray tube The relationship between absorbed dose curve recorded by the flat panel and primary X-ray spectrum is defined by a response function that can be obtained using the Monte Carlo method, namely the MCNP5 code. However there are some problems that affect the applicability of this method such as: flat panel characteristics and the characteristics of the physical process (ill-conditioned problem). Both aspects are discussed in this paper.

  7. Revisión del uso de antibióticos de amplio espectro en el ambiente hospitalario privado en Costa Rica

    Directory of Open Access Journals (Sweden)

    José Miguel Chaverri-Fernández

    2014-12-01

    Full Text Available Justificación: los errores de prescripción en los antibióticos de amplio espectro conducen a problemas de resistencia bacteriana, lo que ha disminuido las opciones farmacológicas para tratar a los pacientes, aumentando los días de hospitalización y la mortalidad. Métodos: el estudio incluye pacientes atendidos en el Hospital Clínica Bíblica, en el periodo del 1 de septiembre de 2012 al 28 de febrero de 2013, a quienes se les administró al menos una dosis en forma I.V. de un antibiótico de amplio espectro. Se analizaron 392 expedientes. Se recopilaron los documentos e información necesaria de cada paciente, para el correspondiente análisis. Resultados: Medicina Interna y Medicina Intensiva fueron las especialidades médicas responsables de prescribir mayoritariamente este tipo de antibióticos. En un 68% de los casos, la primera dosis fue prescrita a pacientes hospitalizados, y en un 57% de las ocasiones se utilizaron otros antibióticos junto con el de amplio espectro. En un 52% de los casos analizados no se realizó un cultivo para la utilización de los antibióticos de amplio espectro. De los pacientes que usaron antibióticos de amplio espectro, una proporción que oscila entre un 15% y un 45% presentaba de previo algún historial de alergia a otro antibiótico. En un 36% de los casos, durante el internamiento hubo un cambio en la estrategia antibiótica establecida. Conclusión: existe la necesidad de desarrollar un protocolo de manejo de antibióticos de amplio espectro en el centro hospitalario, en el cual se detallen los criterios para la utilización de cada antibiótico, con el fin de normar su uso.

  8. Abundancias de litio y actividad estelar en estrellas con exoplanetas a partir de espectros HARPS

    Science.gov (United States)

    Flores, M. G.; Saffe, C. E.; Buccino, A. P.; Mauas, P. J.

    We study the possible excess of lithium (Li) depletion found in stars with planets when they are compared with similar stars (same range of T and log g) without planets. Moreover; we analyzed the possible relation between Li abundances and the stellar activity suggested by some authors. We used high-resolution spectra (R 110.000) of FGK stars with and without planets taken with the HARPS (High Accuracy Radial velocity Planet Searcher) spectrograph; installed at the 3.6 m ESO telescope. FULL TEXT IN SPANISH

  9. Reactor Neutrino Spectra

    CERN Document Server

    Hayes, A C

    2016-01-01

    We present a review of the antineutrino spectra emitted from reactors. Knowledge of these and their associated uncertainties are crucial for neutrino oscillation studies. The spectra used to-date have been determined by either conversion of measured electron spectra to antineutrino spectra or by summing over all of the thousands of transitions that makeup the spectra using modern databases as input. The uncertainties in the subdominant corrections to beta-decay plague both methods, and we provide estimates of these uncertainties. Improving on current knowledge of the antineutrino spectra from reactors will require new experiments. Such experiments would also address the so-called reactor neutrino anomaly and the possible origin of the shoulder observed in the antineutrino spectra measured in recent high-statistics reactor neutrino experiments.

  10. Graphics of (X,Y) spectrum for microcomputer; Graficado de espectro (X,Y) para microcomputadora

    Energy Technology Data Exchange (ETDEWEB)

    Macias B, L.R

    1991-08-15

    When carrying out diffraction works is frequently required to visualize the spectra of the data obtained in order to analyzing them. The design for the obtaining of data in the neutron diffractometer by means of the microcomputer allows to store them in a file by means of the one which transferring to the CYBER system so that by means of its utilities the mentioned spectrum is observed in a graph. In diffraction works, it is sought to study crystalline materials by means of the execution of the Bragg law by that the mounted sample on the diffractometer is subjected to a scanning of the sample with a radiation of a well-known wavelength and this way varying the angles, the corresponding interplanar distances are determined. The main objective of this work, is starting of a data set generated by the diffractometer, to generate the graph of the corresponding (X,Y) spectra in visual form in the screen of a microcomputer and if it is required, to obtain the graph in printed form by means of the same computer program for microcomputer. (Author)

  11. Graphics of (X,Y) spectrum for microcomputer; Graficado de espectro (X,Y) para microcomputadora

    Energy Technology Data Exchange (ETDEWEB)

    Macias B, L.R

    1991-08-15

    When carrying out diffraction works is frequently required to visualize the spectra of the data obtained in order to analyzing them. The design for the obtaining of data in the neutron diffractometer by means of the microcomputer allows to store them in a file by means of the one which transferring to the CYBER system so that by means of its utilities the mentioned spectrum is observed in a graph. In diffraction works, it is sought to study crystalline materials by means of the execution of the Bragg law by that the mounted sample on the diffractometer is subjected to a scanning of the sample with a radiation of a well-known wavelength and this way varying the angles, the corresponding interplanar distances are determined. The main objective of this work, is starting of a data set generated by the diffractometer, to generate the graph of the corresponding (X,Y) spectra in visual form in the screen of a microcomputer and if it is required, to obtain the graph in printed form by means of the same computer program for microcomputer. (Author)

  12. Tabla de frecuencias y espectros de absorción infrarroja de compuestos relacionados con la química del cemento

    Directory of Open Access Journals (Sweden)

    Vázquez-Moreno, T.

    1981-06-01

    Full Text Available Not available

    En los núms. 175, 177 y 179 de esta Revista "Materiales de Construcción" se ha publicado un trabajo con el título "Aplicaciones prácticas de la espectroscopia de absorción infrarroja en el estudio de los crudos, del clinker y del cemento portland anhidro"; en él se decía textualmente que... "se dará, en forma de tablas las frecuencias y asignaciones correspondientes a los espectros IR tanto de los compuestos que se van estudiando como otros muchos que se consideran de interés. Asimismo se incluirán los respectivos espectros IR". A causa de la extensión y de las propias características del anexo, se consideró oportuno el publicarlo separadamente, incluso bajo un título más explicativo.

  13. Propuesta didáctica para la mejora de la comunicación en alumnado con Trastorno del Espectro Autista

    OpenAIRE

    2016-01-01

    El presente trabajo tiene como objetivo principal “la mejora de la comunicación en niños con Trastorno del Espectro Autista en el aula ordinaria concretamente en el segundo ciclo de la Educación Infantil, especialmente la semántica y la pragmática de la comunicación”. La propuesta de intervención está basada en la selección de actividades y materiales adecuados para desarrollar la semántica y la pragmática de los niños con Trastorno del Espectro Autista en las edades de 3 a 6 años. En una ...

  14. Propuesta didáctica para la mejora de la comunicación en alumnado con Trastorno del Espectro Autista

    OpenAIRE

    Sala-Gorgas, Laia

    2016-01-01

    El presente trabajo tiene como objetivo principal “la mejora de la comunicación en niños con Trastorno del Espectro Autista en el aula ordinaria concretamente en el segundo ciclo de la Educación Infantil, especialmente la semántica y la pragmática de la comunicación”. La propuesta de intervención está basada en la selección de actividades y materiales adecuados para desarrollar la semántica y la pragmática de los niños con Trastorno del Espectro Autista en las edades de 3 a 6 años. En una ...

  15. Líneas ciclo trónicas en el espectro de rayos y pulsado

    Directory of Open Access Journals (Sweden)

    Jorge Paez

    2016-03-01

    Full Text Available If the magnetic Bremsstrahlung process is responsable for the lines observes in the spectra of two y-ray bursts, GB880205 and GB870303 detected by the spectrometer of the GINGA satelite, then the fundamental and primary harmonics (transition between the excited Landau levels N=2,1 to the ground-state N´=0 may be identified as the cause of those features detected in those y-ray bursts. We use the transition rate for this process in order to prove our asseveration. We suppose that this process is occurring under the presence of an external magnetic field of order 2*10 12 Gauss. The numerical results for the energy average of the emitted photons are: 22.41 Kev and 43.86 Kev. These energies correspond to the fundamental and primary harmonics transition respectively. Subjet headings: y-rays- magnetic fields- radiation mechanisms.

  16. MULTIWAVELENGTH SYSTEMATICS OF OB SPECTRA

    Directory of Open Access Journals (Sweden)

    Nolan R. Walborn

    2008-01-01

    Full Text Available La sistematica de los espectros OB es resumida, en el rango optico dominado por líneas fotosféricas, y en el lejano ultravioleta (tanto de IUE como de FUSE donde dominan perfiles de los vientos estelares. Primero, las tendencias bidimensionales (temperatura, luminosidad en los espectros normales son examinadas. Luego, establecida la estructura de referencia normal, se pueden reconocer relativo a ésta varias categorías de objetos peculiares, las cuales revelan sendos fenómenos de importancia estructural y/o evolutiva. Se incluyen anomalías de CNO en tipos O tempranos y tardíos, tres variedades de rotadores rápidos, objetos de transición Of/WN de alta y baja temperatura, y la recientemente descubierta segunda estrella magnética de tipo O conocida. Aunque se han adelantado y se siguen adelantando las interpretaciones físicas de estas tendencias y anomalías, mayor atención al modelaje de la sistemática aceleraría el progreso a futuro en la opinión de este autor. Finalmente, se presentan resultados preliminares de un estudio con Chandra en alta resolución de los espectros OB en el rangode rayos X. Éstos proveen evidencias de que, tal como sucedió anteriormente en el UV, tendencias morfológicas sistemáticas existen en el dominio de rayos X, las cuales son correlacionadas con los tipos espectrales ´opticos, y de allá con los parámetros estelares fundamentales, al contrario de la opinión especialista prevaleciente.

  17. LA ENSEÑANZA DE EMOCIONES Y CREENCIAS A ALUMNOS CON TRASTORNOS DEL ESPECTRO AUTISTA: UNA INVESTIGACIÓN COLABORATIVA

    Directory of Open Access Journals (Sweden)

    Josefina Lozano Martínez

    2010-01-01

    Full Text Available En este estudio se muestra el efecto del desarrollo de una intervención educativa en alumnado con trastornos del espectro autista (TEA sobre la comprensión de emociones y creencias como medio para la mejora de sus habilidades sociales. Para ello, doce alumnos con TEA de Educación Primaria y Secundaria participaron en un diseño de investigación colaborativa con evaluación inicial y final donde, para la obtención de datos, se elaboraron materiales didácticos para la enseñanza y evaluación de la comprensión de emociones y creencias y una escala de valoración de habilidades emocionales y sociales para personas con TEA (EVHES, previamente validada. Los resultados muestran que el desarrollo de métodos colaborativos entre profesorado de alumnos con TEA y especialistas universitarios incide de forma positiva sobre los procesos de enseñanza de la comprensión de emociones y creencias y mejora de las habilidades sociales.

  18. Ascaridíase biliar complicada: espectro de problemas e táticas cirúrgicas

    Directory of Open Access Journals (Sweden)

    Lisieux Eyer de Jesus

    Full Text Available OBJETIVO: Discutir as variantes clínicas e táticas para tratamento cirúrgico da ascaridíase biliar complicada. MÉTODO: Trabalho retrospectivo de pacientes operados por complicações de ascaridíase biliar num período de cinco anos. RESULTADOS: São descritos quatro casos de ascaridíase biliar complicada em crianças (três pré escolares e um escolar, expressos através de pseudocisto pancreático, icterícia obstrutiva, colangite e múltiplos abscessos hepáticos, todos tratados cirurgicamente. Descrevemos detalhes técnicos da abordagem operatória para cada um dos casos. CONCLUSÕES: O espectro das afecções biliares secundárias à ascaridíase é variável e é necessário um arsenal de táticas operatórias para a abordagem de cada caso. É desaconselhável o uso de anti-helmínticos antes da resolução clínica da invasão da via biliar. A afecção preferencial de crianças jovens exige o uso de técnicas e materiais adequadamente delicados para a manipulação das vias biliares.

  19. O BRINCAR COMO ELEMENTO DE INCLUSÃO DE CRIANÇAS CARACTERIZADAS COM TRANSTORNOS DO ESPECTRO AUTISTA

    Directory of Open Access Journals (Sweden)

    Maria Luzia da Silva Santana

    2016-06-01

    Full Text Available Esse estudo almeja contribuir com o (re visitar do brincar como instrumento de inclusão escolar, tem o objetivo de problematizar especificamente o brincar de crianças autistas como elemento que pode ser constituinte de uma prática pedagógica inclusiva. A ação de brincar poderá funcionar como estimulador da interação social, imaginação, memória, atenção, linguagem, expressão de pensamentos, internalização de normas e regras sociais, em suma, constitui-se como um elemento da aprendizagem e do desenvolvimento da criança. A prática pedagógica com crianças com transtornos do espectro autista, quando se utiliza o brincar, torna-se mais eficaz, favorecendo a interação infantil com os pares e sua inclusão no contexto educativo. Assim, o brincar surge como elemento possibilitador do desenvolvimento de crianças no processo de aprendizagem e desenvolvimento que merece atenção, principalmente quando se pensa em espaço cultural e social inclusivo de crianças autistas.

  20. Action spectra again?

    Science.gov (United States)

    Coohill, T P

    1991-11-01

    Action spectroscopy has a long history and is of central importance to photobiological studies. Action spectra were among the first assays to point to chlorophyll as the molecule most responsible for plant growth and to DNA as the genetic material. It is useful to construct action spectra early in the investigation of new areas of photobiological research in an attempt to determine the wavelength limits of the radiation region causing the studied response. But due to the severe absorption of ultraviolet (UV) radiation by biological samples, UV action spectra were first limited to small cells (bacteria and fungi). Advances in techniques (e.g. single cell culture) and analysis allowed accurate action spectra to be reported even for mammalian cells. But precise analytical action spectra are often difficult to obtain when large, pigmented, or groups of cells are investigated. Here some action spectra are limited in interpretation and merely supply a wavelength vs effect curve. When polychromatic sources are employed, the interpretation of action spectra is even more complex and formidable. But such polychromatic action spectra can be more directly related to ambient responses. Since precise action spectra usually require the completion of a relatively large number of careful experiments using somewhat sophisticated equipment over a range of at least six wavelengths, they are often not pursued. But they remain central to the elucidation of the effect being studied. The worldwide community has agreed that stratospheric ozone is depleting, with the possibility of a consequent rise in the amount of UV-B (290-320 nm) reaching the earth's surface. It is therefore essential that new action spectra be completed for UV-B effects on a large variety of responses of human, animal, and aquatic plant systems. Combining these action spectra with the known amounts of UV-B reaching the biosphere can give rise to solar UV effectiveness spectra that, in turn, can give rise to estimates

  1. Raman Spectra of Glasses

    Science.gov (United States)

    1986-11-30

    17), Raman spectra, plus a , . theoretical treatment of the data, f complex fluorozirconate 14 I anions in ZBLAN glasses and melts (16), and...based ZBLAN glasses ) 17. ICORS (International Conference on Raman Spectroscopy) Proceedings, London, England. Conferencf 5-9 Sep 88. (Molten silica...RESEARCH FINAL REPORT DTIC CONTRACT N00014-81-K-0501 &JELECTE 1 MAY 81 -- 30 NOV 86 EJJAN041989 V "RAMAN SPECTRA OF GLASSES " 0 During the five years of the

  2. Efecto de la cantidad de solución de líquido en el espectro de gotas de un pulverizador de frutales

    Directory of Open Access Journals (Sweden)

    Mario I. Herrera Prat

    2009-01-01

    Los pulverizadores de chorro proyectado utilizan ventiladores, por lo que el gasto de energía es alto, alcanzando valores de consumos de combustible de 12 L/h, constituyendo este el 35% de los gastos de explotación. La falta de precisión en la aplicación es perjudicial para la salud humana además de lo que representa en la economía de la empresa agrícola. En el trabajo se realiza un estudio del espectro de gotas y la calidad de la aspersión en el pulverizador Mañez-Lozano en plantaciones de cítricos en Cuba. Se utilizó el pulverizador con una regulación fija en el ventilador y se varió la cantidad de líquido plaguicida por hectárea a dos niveles a partir del cambio del diámetro de boquillas. El análisis del espectro de gotas se realizó utilizando la normativa de la ASAE y las gotas fueron capturadas en tarjetas sensibles al agua. Los resultados demuestran que el aumento de la cantidad de líquido a aplicar de 1300 L/ha a 3200 L/ha, manteniendo constante el régimen del ventilador en el pulverizador, deteriora el índice de calidad de cobertura de un 73% a un 63%. El DMV del espectro de gotas varía de 340 a 680 ¿m con el aumento de líquido por área.

  3. Revisión del uso de antibióticos de amplio espectro en el ambiente hospitalario privado en Costa Rica

    OpenAIRE

    José Miguel Chaverri-Fernández; Eugenia Cordero-García; José Pablo Díaz-Madriz; Martha Moya-Blanco; Yulliana Vega-Brown

    2014-01-01

    Justificación: los errores de prescripción en los antibióticos de amplio espectro conducen a problemas de resistencia bacteriana, lo que ha disminuido las opciones farmacológicas para tratar a los pacientes, aumentando los días de hospitalización y la mortalidad. Métodos: el estudio incluye pacientes atendidos en el Hospital Clínica Bíblica, en el periodo del 1 de septiembre de 2012 al 28 de febrero de 2013, a quienes se les administró al menos una dosis en forma I.V. de un antibiótico de amp...

  4. Adaptación psicológica en madres y padres de personas con trastornos del espectro autista : un estudio multidimensional

    OpenAIRE

    Pozo Cabanillas, María del Pilar

    2010-01-01

    Esta tesis tiene como objetivo principal el análisis multidimensional de la adaptación psicológica de las madres y padres que tienen hijos con trastornos del espectro autista (TEA). La tesis se sustenta en los resultados de tres estudios empíricos: a) un estudio multidimensional del estrés en las madres; b) un estudio más complejo en madres y padres, examinando como adaptación tanto variables negativas (estrés, ansiedad, depresión) como positivas (bienestar psicológico y calidad de vida famil...

  5. Cambios en el espectro de la meningitis bacteriana espontánea en el paciente adulto en un hospital de tercer nivel

    OpenAIRE

    Pomar Solchaga, Virginia

    2014-01-01

    La tesis titulada "Cambios en el espectro de la meningitis bacteriana espontánea en el paciente adulto en un hospital de tercer nivel" está formada por 3 artículos y tiene como objetivo global analizar los cambios observados en las meningitis bacterianas del adulto en las últimas décadas en un hospital de tercer nivel de Barcelona. En el primer artículo, se evalúan 635 meningitis bacterianas desde 1982 al 2010, y se analizan en 2 períodos: 1982-1995 y 1996-2010. En el segundo periodo la pobla...

  6. Aplicación de los métodos mecanocuánticos al espectro de emisión del Ca I

    Directory of Open Access Journals (Sweden)

    C. Blume

    2009-07-01

    Full Text Available Hemos reestudiado las asignaciones del espectro de emisióndel Ca I mediante el cálculo de los valores de las integrales radialesF(k, G(k y f(n, 1 a partir de los valores experimentales paratodas las series con un número suficiente de términos. En general,las asignaciones de Moore están en mejor acuerdo que las de Risbergcon las previsiones teóricas.

  7. Utilización de los espacios blancos: una solución al problema de la saturación del espectro de frecuencias

    OpenAIRE

    Castro Lechtaler, Antonio; Foti, Antonio Roberto; Arroyo Arzubi, Alejandro; García Guibout, Jorge; Carmona, Fernanda Beatriz; Fusario, Rubén J.; Oliveros, Alejandro

    2016-01-01

    La necesidad de proveer el Servicio Universal de Comunicaciones en áreas rurales como en zonas de baja densidad poblacional que no cuentan ningún servicio de comunicaciones ha ido llevando a buscar, dentro de las nuevas tecnologías, aquellas que usando los espacios blancos evitan aumentar la congestión del espectro de frecuencias. Esas están basadas en dos técnicas conocidas como Cognitive Radio y Software Defined Radio. Las frecuencias utilizadas por los Sistemas Digitales de Televisión por ...

  8. La inclusión educativa desde la voz de madres de estudiantes con Trastornos del Espectro Autista en una muestra chilena

    OpenAIRE

    2014-01-01

    El objetivo del estudio es mostrar la perspectiva de madres chilenas sobre la inclusión educativa de sus hijos escolarizados en centros de educación primaria, quienes presentan un Trastorno del Espectro Autista. Se recogen evidencias, desde la voz de las familias, que pueden servir como punto de partida para reflexionar sobre cómo avanzar hacia una educación más inclusiva y cómo contribuir a mejorar los apoyos que se brindan a estudiantes con discapacidad. El estudio se enmarca en un paradigm...

  9. Caracterización de cepas y de plásmidos de Enterobacteriaceae portadores de ß-lactamasas de espectro extendido

    OpenAIRE

    Blanc Pociello, Vanessa

    2007-01-01

    La resistencia bacteriana a los antimicrobianos, y en particular la producción de ß- lactamasas plasmídicas de espectro extendido (BLEE), es un grave problema descrito principalmente en cepas de origen clínico. Sin embargo, no existen muchos datos sobre la prevalencia y la capacidad de difusión de estas resistencias en otros ambientes. Por ello, los objetivos de esta Tesis se enmarcan en un amplio proyecto coordinado cuya finalidad ha sido el estudio de la prevalencia de BLEE, cefamicinasas y...

  10. Caracterización de cepas y de plásmidos de Enterobacteriaceae portadores de [beta]-lactamasas de espectro extendido

    OpenAIRE

    Blanc Pociello, Vanessa

    2008-01-01

    Consultable des del TDX Títol obtingut de la portada digitalitzada La resistencia bacteriana a los antimicrobianos, y en particular la producción de ß- lactamasas plasmídicas de espectro extendido (BLEE), es un grave problema descrito principalmente en cepas de origen clínico. Sin embargo, no existen muchos datos sobre la prevalencia y la capacidad de difusión de estas resistencias en otros ambientes. Por ello, los objetivos de esta Tesis se enmarcan en un amplio proyecto coordinado cuy...

  11. Implicaciones clínicas y asistenciales de la nueva clasificación DSM 5 para trastorno del espectro autistas

    OpenAIRE

    Romero González, Marina

    2015-01-01

    OBJETIVOS 1. Estudiar el cumplimiento de los nuevos criterios diagnósticos para Trastorno del Espectro Autista recogidos en el DSM 5 en una muestra de pacientes escolarizados y diagnosticados de Trastorno General del Desarrollo del DSM IV-TR. 2. Estudiar la clasificación de los diferentes subtipos en pacientes diagnosticados con Trastorno General del Desarrollo del DSM IV-TR (Autismo, Síndrome de Asperger y Trastorno general no especificado) entre los pacientes que cumplían los crite...

  12. Influencia de las Redes Sociales en la Integración Social de jóvenes con Trastornos del Espectro Autista.

    OpenAIRE

    Legorburu-Fernández, Idoia

    2013-01-01

    El presente estudio versa sobre la influencia que ejercen las Redes Sociales (RRSS) en la socialización de las personas con Trastorno del Espectro Autista (TEA). Se investiga si mediante las nuevas herramientas existentes en la red los jóvenes con TEA podrían mejorar sus lazos sociales. Más concretamente, tiene como objeto conocer el uso que le dan dichos alumnos a las plataformas sociales, para poder optimizar, posteriormente, las metodologías que utilizan los profesionales en el entrenamien...

  13. Evolución, selección y detección de beta-lactamasas CTX-M con espectro de acción templado

    OpenAIRE

    Ripoll González, Aida

    2016-01-01

    El consumo elevado de carbapenemas para el tratamiento de infecciones causadas por aislados productores de beta-lactamasas de espectro extendido (BLEE), ha conducido a la emergencia y diseminación de resistencia a estos fármacos. Esta Tesis aborda el tratamiento con BLiBLs (beta-lactámicos e inhibidores de beta-lactamasas) desde tres aspectos diferentes. En el primer capítulo se estudia la probabilidad de seleccionar variantes de CTX-M con sensibilidad disminuida a BLiBLs mediante pases seria...

  14. Estudo da possível associação entre a doença celíaca e as desordens do espectro autista

    OpenAIRE

    Batista, Icaro Camargo

    2012-01-01

    Introdução. Um aumento da presença de distúrbios gastrintestinais em pacientes com desordem do espectro autista – (DEA) é um tema recorrente, tanto na literatura médica quanto entre os pais e cuidadores de crianças autistas. Vários estudos têm relatado que as dietas sem glúten e livres de caseína melhoraram os sintomas do autismo, apesar de provas suficientes de que essa associação realmente existe, e uma completa concordância entre os autores sobre este tema ainda está faltando. Buie 2010, E...

  15. Detección de aislados clínicos de Escherichia coli y Klebsiella spp. productoras de B-lactamasas de espectro extendido mediante el sistema DIRAMIC

    OpenAIRE

    Estrella Álvarez-Varela; Angela Zayas-Tamayo; Idania Castillo-Castillo; Leonora González-Mesa; Rolando Contreras-Alarcón

    2010-01-01

    En los últimos años, se ha incrementado el interés por las enterobacterias productoras de B-lactamasas de espectro extendido (BLEE). Las cepas que expresan este fenotipo son capaces de hidrolizar un amplio grupo de antibióticos, incluidas las cefalosporinas de tercera generación y aztreonam, por lo que constituyen un reto terapéutico de difícil abordaje. Este mecanismo les confiere a las bacterias un grado de resistencia variable a los oximino-betalactámicos, se manifiesta en un aumento de la...

  16. Metodología para analizar y simular la eficiencia económica de la flexibilización del uso del espectro radioeléctrico

    OpenAIRE

    García García, José Marino

    2010-01-01

    La asignación eficiente de los recursos escasos se produce a través del mercado mediante la información que transmiten los precios. En el caso de la asignación de frecuencias del espectro radioeléctrico la existencia de interferencias plantea un problema en la asignación de los derechos de propiedad y junto con la presencia de externalidades motiva la intervención estatal en la determinación del uso y precio de las frecuencias. La introducción de criterios de mercado en las asignaciones de es...

  17. Circuito simple de barrido de frecuencia para compartimiento selectivo del espectro electromagnético en sistemas de comunicaciones móviles

    OpenAIRE

    Carlo, Pedro

    1984-01-01

    Se presenta en este trabajo un circuito que acoplado a un transreceptor móvil permite su operación en un grupo de cuatro frecuencias o canales que son compartidos entre varios sistemas móviles independientes. Cada receptor es habilitado por un circuito de tono subaudible que permite la comunicación sólo entre transreceptores del mismo sistema. Se consigue de esta forma una utilización mas eficiente del espectro electromagnético y se conserva también la privacidad de cada sistema.

  18. Trastorno del espectro autista y trastorno específico del lenguaje ¿Dos entidades diferentes o un continuo de manifestaciones neuropsicológicas?

    OpenAIRE

    2013-01-01

    El estudio de los niños con retraso en el desarrollo del lenguaje amerita un gran conocimiento del desarrollo neurológico típico; muchas veces, niños con retraso del lenguaje pueden presentar dificultades sociales y conductuales y puede ser difícil, en especial en etapas tempranas, diferenciar entre trastorno del espectro autista (TEA) y trastorno específico del lenguaje (TEL). Justamente por ello, teniendo en cuenta que muchas veces comparten síntomas comunes se ha postulado que estos trasto...

  19. Modalidades de difusión de la discapacidad : El rol de los actores en relación con el Trastorno del Espectro Autista

    OpenAIRE

    Lucero, Silvana Isabel

    2014-01-01

    El trabajo que se propone presenta la intervención que adoptan los medios masivos de comunicación y las organizaciones sociales en relación con la temática de la discapacidad, específicamente del Trastorno del Espectro Autista. Para ello, hemos tomado en principio la decisión de hacer un recorrido histórico por las legislaciones sobre discapacidad existentes en la Argentina, para luego continuar con la caracterización de los portales gráficos y de las organizaciones sociales seleccionados, in...

  20. Intervención en la comunicación de alumnos con trastorno espectro autista sin lenguaje: SAACS y TICS

    OpenAIRE

    González-Vilar, Cristina

    2015-01-01

    Los Sistemas Alternativos y Aumentativos de Comunicación (SAACS) y las Tecnologías de la Información y de la Comunicación (TICs) están siendo de gran utilidad en personas con Trastorno del Espectro Autista (TEA). Actualmente, existen múltiples opciones para facilitar la comunicación en este colectivo, sin embargo, no se ha encontrado ninguna intervención que tenga en cuenta la inclusión de un alumno con TEA en el aula ordinaria a través de actividades que beneficien a la clase en su conjun...

  1. La musicoterapia como una vía de expresión y comunicación en el Trastorno del Espectro Autista

    OpenAIRE

    Sánchez Martínez, Elías

    2017-01-01

    El TFG en cuestión es una revisión teórica que trata dos temas fundamentalmente, estos son: el Trastorno del Espectro Autista, definición, criterios...etc, y la musicoterapia como medida terapeútica válida para este trastorno. Este documento recoge teorías y estudios que avalan los notables beneficios del uso terapeútico de la música, en especial en las personas que presentan TEA, produciendo cambios significativos en el ámbito social, emociona y académico.

  2. Efectividad de los abordajes de fisioterapia en niños con trastorno del espectro autista : una revisión sistemática

    OpenAIRE

    Ruiz Juárez, Itxaso

    2015-01-01

    RESUMEN: Diseño del estudio: Revisión sistemática acerca de la literatura científica disponible en las bases de datos sobre los diferentes tipos de abordajes terapéuticos en el tratamiento de niños con Trastorno del Espectro Autista (TEA). Objetivos: La intención de esta revisión ofrecer información mediante una búsqueda en la literatura actual sobre los métodos de tratamiento en fisioterapia para abarcar las necesidades de los niños con TEA, indicando si alguna de las terapias es más efe...

  3. Comunicação, vigilância e infraestrutura: tecnopolíticas do espectro eletromagnético | Communication, surveillance and infrastructure: techno-politics of the electromagnetic spectrum

    Directory of Open Access Journals (Sweden)

    Adriano Belisário

    2016-11-01

    Full Text Available RESUMO Este trabalho analisa algumas dinâmicas técnicas e políticas em torno dos usos e aplicações do espectro eletromagnético. Argumentando que a vigilância é parte intrínseca do desenvolvimento de certo modelo e arquitetura tecnológica em um nível infraestrutural, exploramos conceitos e práticas que buscam novas perspectivas de entendimento e ação dentro dessa camada essencial para os processos de comunicação que é o espectro. Iniciamos apresentando o espectro radioelétrico e seu gerenciamento para em seguida debater a noção de “espectro aberto” e seus usos mais recentes. Ao final, apresentamos exemplos que ilustram concepções alternativas técnicas e políticas por meio da noção de “espectro livre”. Palavras-Chave: Vigilância; Comunicação; Rádio; Espectro Eletromagnético; Tecnologia. ABSTRACT This paper examines technical and political dynamics around the uses and applications of the electromagnetic spectrum. Arguing that surveillance is an intrinsic part of the development of a certain technological model and architecture at an infrastructural level, we explore concepts and practices that seek new prospects for understanding and acting in this essential layer for communication processes that is the spectrum. We begin presenting the radio spectrum and its management to then discuss the notion of 'open spectrum' and its most recent uses. At the end, we present examples that illustrate alternative technical and political conceptions by means of the notion of a "free spectrum". Keywords: Surveillance; Communication; Radio, Electromagnetic Spectrum; Technology.

  4. SPECTRAL PHASE: FROM BASICS TO VIDEO-RATE APPLICATION TO TUNING-FORK RESONANCE CHARACTERIZATION // ESPECTRO DE FASE: DE LAS IDEAS BÁSICAS A LA APLICACIÓN EN UN VIDEO DE LA RESONANCIA DE UN DIAPASÓN

    Directory of Open Access Journals (Sweden)

    Patrick Sandoz

    2014-12-01

    Full Text Available Whereas graduated students are usually familiar with Fourier spectra, the spectral phase remains often mysterious to them. This paper proposes a “hands on.approach of discrete Fourier transform (DFT and spectral phase. In a first part, basics of DFT are explored through elementary simulations. The variation of digital parameters allows the identification of sampled frequencies las well as their relation with the size of the sampled window. The significance of the spectrum phase is also illustrated experimentally to demonstrate the useful relationship between a displacement and the spectral phase. In a second part, these properties are put in application for the characterization of tuning-fork resonance by means of video-rate analysis of the spectral phase. Experimental hardware is reduced to elementary devices and remains affordable while involving all aspects of a measurement chain. The proposed progression constitutes a practical approach to discrete Fourier transform and spectral phase properties. At the end, the resonance curve of a tuning-fork is recorded in only a few minutes. The Shannon sampling theorem as well as the uncertainty relation linking the resolutions achieved in the direct and reciprocal domains, are also considered practically throughout this work. Keywords: Fast Fourier Transform, Fourier Phase, tuning fork.// RESUMEN Mientras que los estudiantes graduados están familiarizados con el espectro de Fourier, la fase espectral a menudo se mantiene misteriosa. Este artículo propone una aproximación practica a la Transformada de Fourier Discreta (TFD y a la fase espectral. En una primera parte, se exploran las bases de TFD mediante simulaciones elementales. La variación de parámetros digitales permite la identificación de frecuencias de muestreo y su relación con el tamaño de la ventana muestreada. La importancia del espectro de fase también se ilustra experimentalmente para demostrar la utilidad de la relaci

  5. Spectra and strains

    CERN Document Server

    Golyshev, V

    2008-01-01

    This is a blend of two informal reports on the activities of the seminar on Galois representations and mirror symmetry given at the Conference on classification problems and mirror duality at the Steklov Institute, in March 2006, and at the Seminar on Algebra, Geometry and Physics at MPI, in November 2007. We assess where we are on the issue of the spectra of Fano varieties, and state problems. We introduce higher dimensional irreducible analogues of dessins, the low ramified sheaves, and hypothesize that Fano spectra relate to their geometric conductors. We give a recipe to a physicist.

  6. Determinação do espectro de reflectância de misturas de caulim através da Função de Kubelka-Munk

    OpenAIRE

    Conceição Paulo Ricardo Nunes da; Comim Karina Oliveira; Petter Carlos Otávio

    2001-01-01

    O caulim é um importante mineral industrial, cujo principal parâmetro é uma propriedade colorimétrica, que depende do espectro de reflectância da amostra, a alvura. A alvura por ser um parâmetro colorimétrico apresenta problemas na sua predição para mistura de caulins. Esse estudo descreve uma metodologia para determinação do espectro de reflectância de misturas de caulim.Kaolin is an important industrial mineral whose main parameter is a colorimetric property that depends on the spectrum of ...

  7. Televisão digital e o espectro eletromagnético: apontamentos sobre a gestão do recurso durante o processo de digitalização do sinal televisivo

    OpenAIRE

    Xavier, Renan Schlup [UNESP

    2011-01-01

    A presente dissertação resulta de uma pesquisa descritiva e documental, de cunho exploratório, sobre a televisão digital e sua oportunidade de democratização da comunicação, neste caso, analisando especificamente o espectro da televisão. A substituição do sinal televisivo analógico pelo sinal digital acarreta mudanças significativas no setor de telecomunicações, em especial, por impor nova regulamentação e propor redefinição quanto ao uso do espectro eletromagnético nacional, que pertence ao ...

  8. La Unión Europea y el espectro radioeléctrico: de la armonización técnica a la liberalización del interés público

    OpenAIRE

    García Leiva, María Trinidad

    2009-01-01

    En un escenario en el que los modos tradicionales de gestión del espectro radioeléctrico están en crisis y son cuestionados por una posición neoliberal que defiende la definitiva y total introducción de criterios de mercado en su organización, este artículo tiene como principal objetivo preguntarse por el posicionamiento que al respecto ha adoptado la Unión Europea. Se trata de indagar sobre el sentido de su política destinada al espectro radioeléctrico para clarificar cuáles son los...

  9. A entrevista com os pais na terapia do espectro autístico Interview with parents in autistic spectrum therapy

    Directory of Open Access Journals (Sweden)

    Michele Paula Moro

    2012-06-01

    Full Text Available TEMA: entrevistas continuadas com mães e pais de sujeitos com espectro autístico no processo terapêutico em Fonoaudiologia. PROCEDIMENTOS: as entrevistas com os pais dos sujeitos foram feitas quinzenalmente por 24 meses consecutivos e o conteúdo foi anotado logo após sua realização, para análise posterior. Os dados foram analisados considerando o contexto global de cada caso. RESULTADOS: o espaço aberto pelas entrevistas continuadas foi fundamental para que os pais debatessem suas dúvidas sobre as limitações dos filhos e para que refletissem sobre aspectos como o brincar, a comunicação e o estabelecimento de limites com os filhos. Ou seja, os pais puderam refletir sobre o próprio exercício da função parental. Esse processo foi mais intenso no grupo de mães do que no de pais. Como efeito houve melhora dialógica e do brincar entre os pais e seus filhos. CONCLUSÃO: a entrevista continuada apresentou-se como aspecto fundamental do processo terapêutico realizado sob a perspectiva teórica que inclui a psicanálise e a concepção interacionista de aquisição da linguagem.BACKGROUND: continued interviews with mothers and fathers of subjects with autistic spectrum on the therapeutic process in speech therapy. PROCEDURES: interviews with the subjects' parents were made bi-weekly during 24 months and we account the content for the after-analysis. Data was analyzed as for the global context of the case. RESULTS: the open room for the continuous interviews was crucial for parents in order to discuss their doubts about the limitations of their children and to reflect on aspects, such as playing, communication and setting limits with their children. They also could think about their on parental function practice. This process was more intense in the group of mothers than in the fathers' group. As an effect there were better conditions in playing and in dialogic interaction among parents and children. CONCLUSION: the continued interview

  10. Fenomenología de los Recuerdos Autobiográficos en el Espectro Depresivo: Una Revisión

    Directory of Open Access Journals (Sweden)

    María Lolich

    2015-07-01

    Full Text Available La experiencia de rememoración es distintiva de los recuerdos autobiográficos. Si bien memoria y afectividad se encuentran íntimamente relacionadas, son recientes los estudios que buscan indagar en los perfiles fenomenológicos de evocación durante la ocurrencia de alteraciones afectivas. El presente trabajo expone una revisión de las características fenomenológicas de los recuerdos autobiográficos en presencia de alteraciones del espectro depresivo. Se llevo a cabo una revisión bibliográfica en más de 10 bases de datos  (Academic Search Complete, Cambridge Journals Online, Directory of Open Access Journals, PsycArticles, PsycINFO, PUBMED, SCOPUS, SwetsWise, Taylor, Francis Online y Wiley Online Library de aquellos artículos que abordaron la fenomenología de los recuerdos autobiográficos en individuos con alteraciones depresivas publicados durante los años 2000–2014. Fueron incluidos para el análisis un total de 13 publicaciones. Los estudios concluyen que durante la presencia de sintomatología depresiva clínicamente significativa los recuerdos de valencia positiva son evocados desde una perspectiva de tercera persona, con bajos niveles de intensidad emocional y escasa vivacidad. Por otro lado, los recuerdos negativos de tipo intrusivo resultan altamente vívidos y emocionalmente intensos, acompañados por distintos componentes sensoriales. Los resultados preliminares sugieren que los atributos fenomenológicos, tanto de los recuerdos positivos como negativos, se encontrarían relacionados con la aparición y evolución a corto plazo de los cuadros depresivos. Además, una modalidad de evocación de tipo generalizada, en contraposición con una evocación específica, se encontró asociada con la presencia de sintomatología afectiva. Considerando los vínculos entre el sí mismo y la memoria autobiográfica y, dado que los modelos psicoterapéuticos requieren que los individuos exploren su pasado personal, el promover un

  11. Conhecimentos e necessidades dos professores em relação aos transtornos do espectro autístico

    Directory of Open Access Journals (Sweden)

    Natalia Caroline Favoretto

    2014-03-01

    Full Text Available De acordo às normativas do Ministério da Educação, indivíduos com deficiência e necessidades educacionais especiais devem frequentar classes regulares visando à inclusão destes no sistema educacional. Portanto, é de extrema relevância que o professor seja sempre capacitado a atender as demandas de seus alunos no que tange aos processos de aprendizagem. Este estudo faz parte de um projeto maior com objetivo de utilizar recursos de teleducação como estratégia de ação para prover informações aos professores do ensino infantil visando à inclusão de crianças com Transtornos do Espectro Autístico (TEA na rede regular de ensino. Este trabalho constou da aplicação e análise de um questionário, realizado com 38 professores de ensino infantil da rede pública municipal de Bauru para investigar as experiências dos professores em relação aos TEA e necessidades de conteúdos sobre a temática. De posse a este conhecimento, foram organizados conteúdos programáticos para elaboração um curso de difusão de conhecimentos que será desenvolvido em uma próxima etapa. Os resultados evidenciaram que a inclusão escolar está em processo de crescimento, porém com professores carentes por informações. Com o estudo, foi possível obter uma maior integração entre a comunidade fonoaudiológica e pedagógica, favorecendo a elaboração do conteúdo de um curso de difusão para os professores que vise à inclusão dos alunos com TEA na rede regular de ensino.

  12. Espectro óculo-aurículo-vertebral em pacientes com defeitos cardíacos congênitos

    Directory of Open Access Journals (Sweden)

    Rafael Fabiano Machado Rosa

    2010-10-01

    Full Text Available FUNDAMENTO: Há poucos estudos avaliando a frequência do espectro óculo-aurículo-vertebral (EOAV nos pacientes com defeitos cardíacos congênitos (DCC. OBJETIVO: Verificar a frequência do EOAV em uma amostra de pacientes com malformações cardíacas graves. MÉTODOS: Avaliamos uma coorte prospectiva de pacientes com DCC, admitidos em uma unidade de terapia intensiva (UTI cardiopediátrica no Brasil. O diagnóstico de EOAV foi feito com base em dados clínicos, considerando critérios padrões. Os pacientes que preenchiam esses critérios foram submetidos ao cariótipo de alta resolução com bandamento GTG e hibridização fluorescente in situ para a microdeleção 22q11.2. O teste exato de Fisher (P < 0,05 foi usado para as análises estatísticas. RESULTADOS: Durante o período de avaliação, 330 pacientes foram hospitalizados pela primeira vez na UTI, mas trinta deles não participaram deste estudo. Dos 300 pacientes que constituíram a amostragem final, o EOAV foi verificado em três casos (1%. Todos apresentaram estudos citogenéticos normais. CONCLUSÃO: O EOAV parece ser uma condição frequente em pacientes com DCC. Contudo, não podemos excluir a possibilidade de que a frequência de EOAV encontrada em nosso estudo possa ter sido subestimada devido à baixa taxa de detecção pré-natal de DCC e ao acesso limitado dos pacientes ao tratamento médico apropriado em nosso meio. Estudos prospectivos futuros com critérios clínicos bem definidos e pacientes com defeitos leves e graves serão importantes para avaliar o papel do EOAV na população em geral de indivíduos com malformações cardíacas.

  13. Atomic Spectra Database (ASD)

    Science.gov (United States)

    SRD 78 NIST Atomic Spectra Database (ASD) (Web, free access)   This database provides access and search capability for NIST critically evaluated data on atomic energy levels, wavelengths, and transition probabilities that are reasonably up-to-date. The NIST Atomic Spectroscopy Data Center has carried out these critical compilations.

  14. ESPECTROS DEL MUSEO

    Directory of Open Access Journals (Sweden)

    Carolina Acosta Martínez

    2011-04-01

    Full Text Available Este artículo proviene de una serie de reflexiones previas en torno a diversos conceptos, como lo espectral (Derrida y lo siniestro (Freud, que han resultado sumamente fructíferos en procesos creativos de indagación personal que he llevado a cabo alrededor de la imagen. En este caso, parto de lo espectral como categoría de análisis del museo y de la galería en cuanto instituciones artísticas fuertemente cuestionadas en la actualidad. Me interesa señalar el carácter fantasmagórico o espectral de las identidades del museo y de la galería1, rasgo que ya ha sido señalado por autores como Remo Guidieri quien, siguiendo una lógica derridiana, estudia el proceso de fetichización de los objetos artísticos que corre por cuenta del espacio museal.

  15. ESPECTROS DEL MUSEO

    OpenAIRE

    Carolina Acosta Martínez

    2011-01-01

    Este artículo proviene de una serie de reflexiones previas en torno a diversos conceptos, como lo espectral (Derrida) y lo siniestro (Freud), que han resultado sumamente fructíferos en procesos creativos de indagación personal que he llevado a cabo alrededor de la imagen. En este caso, parto de lo espectral como categoría de análisis del museo y de la galería en cuanto instituciones artísticas fuertemente cuestionadas en la actualidad. Me interesa señalar el carácter fantasmagórico o espectra...

  16. Espectros de la movida

    OpenAIRE

    Rodríguez Ortega, Vicente

    2014-01-01

    La Movida es uno de los prismas interpretativos fundamentales de la Transición. La historia oficial (o más bien oficializada desde la contemporaneidad) nos cuenta que durante comienzos de los 80 Madrid se transformó en un irreverente crisol de propuestas de diversa índole. Una serie de figuras dispares y heterogéneas rompieron con el traumático pasado franquista y modernizaron una sociedad anquilosada que carecía de la capacidad de beber de las vetas culturales que ganaban notoriedad en otros...

  17. Identificación genotípica de β-lactamasas de espectro espectro extendido (BLEE (blaTEM y blaSHV en Escherichia coli uropatógena

    Directory of Open Access Journals (Sweden)

    Yeffersson Grandas Franco

    2016-06-01

    Full Text Available Introducción: Las infecciones de tracto urinario (ITU son consideradas un problema de salud pública a nivel mundial debido a su incidencia y morbilidad. Entre los agentes causales que se aíslan con mayor frecuencia, se encuentra E. coli, con una prevalencia que va desde 40% al 95%. Actualmente, la problemática de las ITU ha venido en aumento, debido a la aparición de resistencia bacteriana a agentes antimicrobianos, influenciado por la presión selectiva, la preexistencia de genes de resistencia y el uso indiscriminado de antibióticos. Objetivo: Identificar molecularmente β-lactamasas de espectro extendido (blaTEM y blaSHV, en E. coli uropatógena, aislada en pacientes ambulatorios que asisten a un laboratorio clínico de tercer nivel de complejidad. Materiales y métodos: Estudio descriptivo de corte transversal. En este trabajo se estudiaron 250 cepas de las cuales 120 eran presuntivas de producir β-lactamasas de acuerdo al método de Kirby-bauer que se realizó años anteriores por el semillero de Inmunidad e Infección. Los genes de interés se amplificaron mediante PCR. Se utilizó Klebsiella pneumoniae ATCC 700603 como control positivo. Una vez amplificado el gen se llevó a cabo el corrido electroforético en gel de agarosa donde el producto amplificado fue de 470 pb en el caso de blaSHV y de 1080 pb para blaTEM. Los fenotipos compatibles con producción de β-lactamasas se analizaron por medio de distribución de frecuencia usando el software WHONET 5,6. La distribución de frecuencia de los genes analizados se calculó usando el software MedCalc versión 15.2.2 (Bélgica – Software BBVA. Resultados: De las cepas analizadas, el 52,8% portadoras del gen blaTEM y el 2,8% del gen blaSHV-2. Se encontró co-existencia de los genes blaSHV-2 y blaTEM en el 1,68% del total de las cepas. De todas las cepas presuntivas de producir BLEE (n=120, 94 fueron productoras de BLEE, lo que nos indicaría que las 21 cepas restantes, implementan

  18. Direct recovery of fluctuation spectra from tomographic shear spectra

    Science.gov (United States)

    Mezzetti, Marino; Bonometto, Silvio A.; Casarini, Luciano; Murante, Giuseppe

    2012-06-01

    Forthcoming experiments will enable us to determine high precision tomographic shear spectra. Matter density fluctuation spectra, at various z, should then be recovered from them, in order to constrain the model and determine the DE state equation. Available analytical expressions, however, do the opposite, enabling us to derive shear spectra from fluctuation spectra. Here we find the inverse expression, yielding density fluctuation spectra from observational tomographic shear spectra. The procedure involves SVD techniques for matrix inversion. We show in detail how the approach works and provide a few examples.

  19. Literatura científica brasileira sobre transtornos do espectro autista Brazilian scientific literature about autism spectrum disorders

    Directory of Open Access Journals (Sweden)

    Maria Cristina Triguero Veloz Teixeira

    2010-01-01

    Full Text Available OBJETIVOS: O presente estudo refere-se a uma revisão sistemática, cujo objetivo foi conduzir uma análise da produção científica de autores brasileiros sobre Transtornos do espectro autista (TEA, no período de 2002 a 2009. MÉTODOS: A busca bibliográfica foi realizada nas bases de dados: PUBMED, SciELO, LILACS e portal CAPES, incluindo diversos descritores, tais como autismo e transtorno invasivo do desenvolvimento. RESULTADOS: Um total de 93 artigos foi identificado, tendo sido publicados, sobretudo por autores da região Sudeste e de universidades públicas. Aproximadamente um terço dos artigos foi publicado em revistas com algum fator de impacto variando entre 0,441 e 3,211; sendo a maioria dos artigos baseada em amostras pequenas. Foram identificadas 140 dissertações e teses; 82,1% eram dissertações de mestrado. O principal tema de pesquisa abordado neste material relacionou-se a programas de intervenção para TEA. CONCLUSÃO: Esta revisão mostra o interesse de pesquisadores brasileiros na temática dos TEA, entretanto, uma parte considerável dessa produção científica se concentra em dissertações/teses e a minoria em artigos científicos publicados em revistas com elevado fator de impacto. Os resultados desta revisão sistemática mostram a necessidade de novos estudos com amostras maiores que levariam a um maior impacto e visibilidade da produção científica brasileira relativa aos TEA.OBJECTIVE: This study is a systematic review aiming to conduct a general analysis of the scientific production covering publications of Brazilian authors about ASD in the period from 2002 to 2009. METHODS: The bibliographic search was conducted in the following scientific databases: PUBMED, SciELO, LILACS and portal CAPES, by using keywords such as autism and pervasive developmental disorders. RESULTS: A total of 93 papers were identified mainly produced by authors from tSoutheast Brazil and from public universities. Approximately one

  20. Terapia de linguagem no espectro autístico: a interferência do ambiente terapêutico Language therapy and autism spectrum: the therapeutic environment interference

    Directory of Open Access Journals (Sweden)

    Andréa Regina Nunes Misquiatti

    2011-06-01

    Full Text Available OBJETIVO: Analisar o perfil funcional da comunicação de crianças e adolescentes com distúrbios do espectro autístico em dois ambientes de terapia de linguagem, que se diferenciam quanto ao aspecto físico. MÉTODOS: Participaram dez sujeitos com distúrbios do espectro autístico, seis do gênero masculino e quatro do gênero feminino, com idades entre 4 e 13 anos. Na coleta de dados, foram realizadas filmagens de oito sessões de terapia de linguagem individual com duração de 30 minutos, sendo quatro sessões em uma sala comum e quatro em uma sala com ambientação específica (sala NIC, intercaladamente, durante um mês. Para a análise dos dados foi empregado o Protocolo de Pragmática, e os resultados receberam tratamento estatístico. RESULTADOS: Verificou-se que não houve diferença significativa entre o perfil pragmático apresentado pelos dez sujeitos na sala comum e na sala NIC. CONCLUSÃO: O contexto físico aqui estudado não influenciou significativamente no perfil funcional da comunicação de indivíduos do espectro autístico, ainda que se tenha verificado tendências individuais apresentando melhor desempenho em uma sala ou em outra.PURPOSE: To analyze the functional communicative profile of children and adolescents with autistic spectrum disorders in two different language therapy environments which differ from each other on the physical environment. METHODS: Participants were ten subjects with autistic spectrum disorders, six male and four female, with ages varying from 4 to 13 years. For data gathering, eight 30-minute individual language therapy sessions were videotaped: four sessions in regular therapy settings (common room interspersed with four sessions in a specific environment setting (NIC room, for one month. Results were registered on the Pragmatic Protocol, and statistical analysis was carried out. RESULTS: No significant differences were found between the pragmatic profile presented by the subjects in the

  1. Análisis del espectro infrarrojo del polvo interestelar asociado con cúmulos globulares y de su evolución temporal

    Science.gov (United States)

    Pellizza, L. J.; Forte, J. C.; Carpintero, D.

    El trabajo que se presenta investiga la dinámica de las partículas de polvo interestelar eyectadas por estrellas gigantes rojas en un cúmulo globular utilizando simulaciones numéricas de su interacción con el campo gravitatorio y con la radiación electromagnética de las estrellas. Se pretende con ello determinar la distribución espacial de ese material como una función del tiempo en un sistema similar a NGC 104 (47 Tuc). A partir de la distribución espacial resultante se obtuvo el espectro infrarrojo integrado el cual sugiere que el máximo contraste con la radiación estelar ocurre en longitudes de onda cercanas a 300 μm y que decrece rápidamente hacia longitudes de onda menores, en las que suelen realizarse las observaciones.

  2. A PROOF OF THE DISCRETENESS OF THE BOSONIC MEMBRANE SPECTRUM // UNA PRUEBA DE LA DISCRETITUD DEL ESPECTRO DE LA MEMBRANA BOSÓNICA ABIERTA

    Directory of Open Access Journals (Sweden)

    Rafael Torrealba Suárez

    2013-06-01

    Full Text Available Using an spectral theorem for Schrödinger like equations, we present a proof of the discreteness of the spectrum for bosonic membrane in a .at minkowski space. This may be useful to show the quantum mechanical consistence of either supersymmetric or bosonic extended models. The BRST efective gauge fixed action and the residual symmetry were studied.// RESUMEN: Usando un teorema espectral para ecuaciones tipo Schrödinger, probamos que el espectro de autovalores de la membrana bosónica es discreto-contable en un espacio minkowskiano. Esto puede ser de utilidad para probar la consistencia mecánico cuántica tanto de modelos supersimétricos como otros modelos bosónicos extendidos. Se estudian la acción efectiva BRST con fijación de calibre y su simetría residual.

  3. Os efeitos de um simulador de equitação no controle postural de indivíduos com Transtornos do Espectro do Autismo

    OpenAIRE

    Lilian Fernanda Araya Chateau

    2013-01-01

    Os Transtornos do Espectro do Autismo (TEA) constituem um grupo de condições de causas neurobiológicas de início precoce e curso crônico que se caracteriza por prejuízos em três áreas do desenvolvimento: interação social, comunicação e comportamento. Evidências tem demonstrado que esta população apresenta prejuízos para além da tríade diagnóstica, prejuízo no desenvolvimento motor como: déficits no controle postural, na coordenação motora e na integração sensorial. Uma prática interventiva qu...

  4. Dioptrio bloqueante de radiaciones de longitudes de onda corta y media del espectro visible que afecta a la fisiología humana

    OpenAIRE

    Sánchez Ramos, Celia; García Manchado, Nilo

    2017-01-01

    Dioptrio bloqueante de radiaciones de longitudes onda corta y media del espectro visible que afectan la fisiología humana que comprende la absorción selectiva de longitudes de onda corta comprendidas entre 380 nm y 500 nm entre un umbral máximo y un umbral mínimo de absorción; y la absorción selectiva de longitudes de onda media comprendida entre 500 nm y 590 nm entre un umbral máximo y un umbral mínimo de absorción; y donde la absorción selectiva de longitudes de onda corta y media comprendi...

  5. EL AJUSTE CONDUCTUAL, EMOCIONAL Y SOCIAL EN HERMANOS DE NIÑOS CON UN TRASTORNO DEL ESPECTRO AUTISTA. UNA REVISIÓN TEÓRICA

    Directory of Open Access Journals (Sweden)

    Raquel Ruiz Aparicio

    2015-09-01

    Full Text Available Las personas con Trastorno del Espectro Autista (TEA tienen características únicas y hay una falta de conocimiento sobre cómo estas características podrían influir en sus familias y en el ajuste conductual, emocional y social de sus hermanos. El presente estudio tiene el objetivo de centrarse en los hermanos de estas personas con TEA y realizar una revisión teórica relacionada con el ajuste conductual, emocional y social de hermanos de niños con TEA. Un total de 24 artículos han sido incluidos y analizados con el fin de encontrar resultados relevantes que puedan ayudar a entender las necesidades de estos hermanos. El estudio sugiere, en ocasiones, resultados diferentes pero identifica aquellos factores de riesgo que podrían impactar en el núcleo familiar y, principalmente, en los hermanos de niños con TEA.

  6. Detección de suero de quesería en leches ultrapasteurizadas mexicanas mediante la cuarta derivada del espectro de absorción

    OpenAIRE

    Acacia Ramírez Ayala; Salvador Vega y León; Guadalupe Prado Flores; Rey Gutiérrez Tolentino; Cuauhtémoc Pérez González

    2008-01-01

    Se determinó la presencia de suero de quesería en leches ultrapasteurizadas (UHT) comercializadas en la Ciudad de México mediante el método de la cuarta derivada del espectro de absorción, el cual permite conocer la variación de la relación proteínas de suero/proteína total (PS/PT). La cuantifi cación de la relación PS/PT se utilizó como indicador de la adulteración con suero de quesería. El método fue estandarizado evaluando la exactitud, linealidad y repetibilidad mediante la adición de sue...

  7. El uso de la musicoterapia para la mejora de la comunicación de niños con Trastorno del Espectro Autista en Aulas Abiertas Especializadas

    Directory of Open Access Journals (Sweden)

    Paloma del Rocío TALAVERA JARA

    2016-01-01

    Full Text Available Los beneficios que aporta la musicoterapia en alumnos con Trastorno del Espectro Autista, han sido demostrados profusamente por los distintos autores, si bien carecemos de literatura suficiente sobre su utilización en las Aulas Abiertas Especializadas en colegios ordinarios (Aulas TEA. En este sentido, el objetivo del trabajo, ha consistido en analizar qué mejoras aporta la musicoterapia al desarrollo de la comunicación en los alumnos con Trastorno del Espectro Autista dentro de las Aulas Abiertas de los CEIPs de Castilla-La Mancha y la Comunidad Autónoma de Madrid. Para ello, se ha realizado una amplia revisión documental de fuentes de referencia y se ha entrevistado a los docentes responsables de las Aulas Abiertas Especializadas que utilizan actividades de musicoterapia como recurso en el aula. Se concluye el artículo manifestando, en primer lugar, la escasa integración de la musicoterapia en las aulas TEA (menos del 20% de los centros. En aquellas aulas que sí se programa con actividades de musicoterapia, los beneficios que ésta aporta se ven reflejados en un incremento claro de la intención comunicativa en los alumnos. Además, a la hora de planificar las actividades se tiene muy en cuenta conocer las preferencias y la historia musical del niño. No obstante, existen factores que impiden el aprovechamiento total de las posibilidades terapéuticas de la musicoterapia debido, especialmente a: a una escasa formación del profesorado y b un espacio inadecuado para poner en práctica una sesión de musicoterapia.

  8. Avaliação audiológica comportamental e eletrofisiológica no transtorno do espectro do autismo

    Directory of Open Access Journals (Sweden)

    Ana Carla Leite Romero

    2014-06-01

    Full Text Available Objetivo descrever os achados das avaliações audiológicas comportamentais e eletrofisiológicas de pacientes com diagnóstico de transtorno do espectro do autismo. Métodos estudo descritivo, de coorte contemporânea com corte transversal, composto por nove pacientes com diagnóstico de transtorno do espectro do autismo, submetidos a avaliação comportamental e eletrofisiológica da audição. Os resultados foram analisados por meio de estatística descritiva. Resultados todos os pacientes avaliados apresentaram limiares audiométricos dentro dos padrões de normalidade. Oito pacientes apresentaram curva timpanométrica do tipo A, e um do tipo C. Observou-se emissões otoacústicas por produto de distorção presentes em todos os pacientes avaliados. Os resultados do potencial evocado auditivo de tronco encefálico demonstraram integridade das vias auditiva. Conclusão a população estudada apresentou resultados compatíveis com a normalidade tanto na avaliação comportamental como na avaliação eletrofisiológica da audição. Pelo fato de não haver consenso, na literatura especializada, quanto aos achados audiológicos nesta população, principalmente no que se refere à avaliação eletrofisiológica do processamento auditivo, sugere-se a realização de novos estudos.

  9. Control spectra for Quito

    Science.gov (United States)

    Aguiar, Roberto; Rivas-Medina, Alicia; Caiza, Pablo; Quizanga, Diego

    2017-03-01

    The Metropolitan District of Quito is located on or very close to segments of reverse blind faults, Puengasí, Ilumbisí-La Bota, Carcelen-El Inca, Bellavista-Catequilla and Tangahuilla, making it one of the most seismically dangerous cities in the world. The city is divided into five areas: south, south-central, central, north-central and north. For each of the urban areas, elastic response spectra are presented in this paper, which are determined by utilizing some of the new models of the Pacific Earthquake Engineering Research Center (PEER) NGA-West2 program. These spectra are calculated considering the maximum magnitude that could be generated by the rupture of each fault segment, and taking into account the soil type that exists at different points of the city according to the Norma Ecuatoriana de la Construcción (2015). Subsequently, the recurrence period of earthquakes of high magnitude in each fault segment is determined from the physical parameters of the fault segments (size of the fault plane and slip rate) and the pattern of recurrence of type Gutenberg-Richter earthquakes with double truncation magnitude (Mmin and Mmax) is used.

  10. Meteors and meteorites spectra

    Science.gov (United States)

    Koukal, J.; Srba, J.; Gorková, S.; Lenža, L.; Ferus, M.; Civiš, S.; Knížek, A.; Kubelík, P.; Kaiserová, T.; Váňa, P.

    2016-01-01

    The main goal of our meteor spectroscopy project is to better understand the physical and chemical properties of meteoroids. Astrometric and spectral observations of real meteors are obtained via spectroscopic CCD video systems. Processed meteor data are inserted to the EDMOND database (European viDeo MeteOr Network Database) together with spectral information. The fully analyzed atmospheric trajectory, orbit and also spectra of a Leonid meteor/meteoroid captured in November 2015 are presented as an example. At the same time, our target is the systematization of spectroscopic emission lines for the comparative analysis of meteor spectra. Meteoroid plasma was simulated in a laboratory by laser ablation of meteorites samples using an (ArF) excimer laser and the LIDB (Laser Induced Dielectric Breakdown) in a low pressure atmosphere and various gases. The induced plasma emissions were simultaneously observed with the Echelle Spectrograph and the same CCD video spectral camera as used for real meteor registration. Measurements and analysis results for few selected meteorite samples are presented and discussed.

  11. Sequencing BPS Spectra

    CERN Document Server

    Gukov, Sergei; Saberi, Ingmar; Stosic, Marko; Sulkowski, Piotr

    2015-01-01

    This paper provides both a detailed study of color-dependence of link homologies, as realized in physics as certain spaces of BPS states, and a broad study of the behavior of BPS states in general. We consider how the spectrum of BPS states varies as continuous parameters of a theory are perturbed. This question can be posed in a wide variety of physical contexts, and we answer it by proposing that the relationship between unperturbed and perturbed BPS spectra is described by a spectral sequence. These general considerations unify previous applications of spectral sequence techniques to physics, and explain from a physical standpoint the appearance of many spectral sequences relating various link homology theories to one another. We also study structural properties of colored HOMFLY homology for links and evaluate Poincar\\'e polynomials in numerous examples. Among these structural properties is a novel "sliding" property, which can be explained by using (refined) modular $S$-matrix. This leads to the identifi...

  12. Influence of blue light spectrum filter on short-wavelength and standard automated perimetries Influência de filtro para o espectro azul da luz na perimetria computadorizada branco-branco e azul-amarelo

    Directory of Open Access Journals (Sweden)

    Leonardo Cunha Castro

    2006-10-01

    Full Text Available PURPOSE: To evaluate the influence of a blue light spectrum filter (BLSF, similar in light spectrum transmittance to the intraocular lens Acrysof NaturalTM, on standard automated perimetry (SAP and short-wavelength automated perimetry (SWAP. METHODS: Twenty young individuals (OBJETIVO: Avaliar a influência de um filtro para o espectro azul da luz, semelhante à lente intra-ocular Acrysof Natural®, nos exames de perimetria automatizada padrão (branco-no-branco e de comprimento de onda curto (azul-no-amarelo. MÉTODOS: Vinte pacientes jovens sem alterações oculares (20 olhos realizaram seqüência de 4 exames de campo visual: perimetria automatizada padrão e azul-no-amarelo com e sem o filtro para o espectro azul da luz. Os índices de limiar foveal (FT, desvio médio (MD e desvio-padrão (PSD obtidos em todos os exames e a diferença causada pela excentricidade nos exames de perimetria automatizada azul-no-amarelo foram analisados. Variabilidade interindivíduos (desvio-padrão dos pontos testados foi calculada. RESULTADOS: Observou-se redução estatisticamente significante no desvio médio (p<0.001 e no limiar foveal (p<0.001 medidos pela perimetria automatizada azul-no-amarelo com o uso do filtro para o espectro azul da luz comparado quando realizado sem o filtro. Nenhum outro índice avaliado apresentou diferença estatisticamente significante nos exames de perimetria automatizada padrão ou azul-no-amarelo. Foi notado aumento da variabilidade interindivíduos com a excentricidade nos exames de perimetria automatizada azul-no-amarelo com e sem o uso do filtro para o espectro azul da luz, assim como a diferença de sensibilidade entre os hemisférios inferior e superior (hemisfério inferior menos superior, mas não houve diferença estatisticamente significante quando comparados os exames com e sem o uso do filtro. Quando foram comparados os 4 pontos mais inferiores e os 4 pontos mais superiores, a diferença inferior-superior aumentou

  13. Comunicação e transtornos do espectro do autismo: análise do conhecimento de professores em fases pré e pós-intervenção

    Directory of Open Access Journals (Sweden)

    Andréa Regina Nunes Misquiatti

    2014-04-01

    Full Text Available Objetivo analisar o conhecimento de professores de ensino fundamental sobre a comunicação de pessoas com transtornos do espectro do autismo, em dois momentos distintos, pré e pós-intervenção. Métodos trata-se de um estudo descritivo comparativo, em que participaram 160 professores de escolas municipais de ensino fundamental, de ambos os gêneros, com idades entre 23 e 65 anos. Para verificar o conhecimento dos professores sobre a comunicação nos transtornos do espectro do autismo, foi elaborado e aplicado um questionário especificamente para este estudo. O instrumento, oferecido aos professores, foi aplicado em dois momentos distintos, pré e pós-intervenção. O procedimento de intervenção constou de dois encontros, de quatro horas cada, conduzidos por fonoaudiólogos e entrega de manual de orientação sobre os transtornos do espectro do autismo, com ênfase em aspectos da comunicação e linguagem. Foram analisadas e comparadas as respostas pré e pós-intervenção. Os resultados foram tratados estatisticamente (p<0,05 e em alguns casos p<0,01; foi utilizado o teste de Qui-quadrado para Proporções. Resultados foi possível observar que os professores apresentavam conhecimento restrito sobre a comunicação nos transtornos do espectro do autismo e sobre esses quadros clínicos de modo geral. Além disso, verificou-se aumento significante de respostas corretas por parte dos professores após a intervenção. Conclusão constatou-se um restrito conhecimento dos professores sobre a comunicação nos transtornos do espectro do autismo e efeitos positivos do procedimento de intervenção, por meio da análise comparativa entre as fases pré e pós-intervenção, que evidenciou aumento significante de respostas adequadas sobre os transtornos do espectro do autismo.

  14. Sequencing BPS spectra

    Science.gov (United States)

    Gukov, Sergei; Nawata, Satoshi; Saberi, Ingmar; Stošić, Marko; Sułkowski, Piotr

    2016-03-01

    This paper provides both a detailed study of color-dependence of link homologies, as realized in physics as certain spaces of BPS states, and a broad study of the behavior of BPS states in general. We consider how the spectrum of BPS states varies as continuous parameters of a theory are perturbed. This question can be posed in a wide variety of physical contexts, and we answer it by proposing that the relationship between unperturbed and perturbed BPS spectra is described by a spectral sequence. These general considerations unify previous applications of spectral sequence techniques to physics, and explain from a physical standpoint the appearance of many spectral sequences relating various link homology theories to one another. We also study structural properties of colored HOMFLY homology for links and evaluate Poincaré polynomials in numerous examples. Among these structural properties is a novel "sliding" property, which can be explained by using (refined) modular S-matrix. This leads to the identification of modular transformations in Chern-Simons theory and 3d {N}=2 theory via the 3d/3d correspondence. Lastly, we introduce the notion of associated varieties as classical limits of recursion relations of colored superpolynomials of links, and study their properties.

  15. Non-Gaussian Spectra

    CERN Document Server

    Ferreira, P G; Ferreira, Pedro G.; Magueijo, Joao

    1997-01-01

    Gaussian cosmic microwave background skies are fully specified by the power spectrum. The conventional method of characterizing non-Gaussian skies is to evaluate higher order moments, the n-point functions and their Fourier transforms. We argue that this method is inefficient, due to the redundancy of information existing in the complete set of moments. In this paper we propose a set of new statistics or non-Gaussian spectra to be extracted out of the angular distribution of the Fourier transform of the temperature anisotropies in the small field limit. These statistics complement the power spectrum and act as localization, shape, and connectedness statistics. They quantify generic non-Gaussian structure, and may be used in more general image processing tasks. We concentrate on a subset of these statistics and argue that while they carry no information in Gaussian theories they may be the best arena for making predictions in some non-Gaussian theories. As examples of applications we consider superposed Gaussi...

  16. Sequencing BPS spectra

    Energy Technology Data Exchange (ETDEWEB)

    Gukov, Sergei [Walter Burke Institute for Theoretical Physics, California Institute of Technology,1200 E California Blvd, Pasadena, CA 91125 (United States); Max-Planck-Institut für Mathematik,Vivatsgasse 7, D-53111 Bonn (Germany); Nawata, Satoshi [Walter Burke Institute for Theoretical Physics, California Institute of Technology,1200 E California Blvd, Pasadena, CA 91125 (United States); Centre for Quantum Geometry of Moduli Spaces, University of Aarhus,Nordre Ringgade 1, DK-8000 (Denmark); Saberi, Ingmar [Walter Burke Institute for Theoretical Physics, California Institute of Technology,1200 E California Blvd, Pasadena, CA 91125 (United States); Stošić, Marko [CAMGSD, Departamento de Matemática, Instituto Superior Técnico,Av. Rovisco Pais, 1049-001 Lisbon (Portugal); Mathematical Institute SANU,Knez Mihajlova 36, 11000 Belgrade (Serbia); Sułkowski, Piotr [Walter Burke Institute for Theoretical Physics, California Institute of Technology,1200 E California Blvd, Pasadena, CA 91125 (United States); Faculty of Physics, University of Warsaw,ul. Pasteura 5, 02-093 Warsaw (Poland)

    2016-03-02

    This paper provides both a detailed study of color-dependence of link homologies, as realized in physics as certain spaces of BPS states, and a broad study of the behavior of BPS states in general. We consider how the spectrum of BPS states varies as continuous parameters of a theory are perturbed. This question can be posed in a wide variety of physical contexts, and we answer it by proposing that the relationship between unperturbed and perturbed BPS spectra is described by a spectral sequence. These general considerations unify previous applications of spectral sequence techniques to physics, and explain from a physical standpoint the appearance of many spectral sequences relating various link homology theories to one another. We also study structural properties of colored HOMFLY homology for links and evaluate Poincaré polynomials in numerous examples. Among these structural properties is a novel “sliding” property, which can be explained by using (refined) modular S-matrix. This leads to the identification of modular transformations in Chern-Simons theory and 3d N=2 theory via the 3d/3d correspondence. Lastly, we introduce the notion of associated varieties as classical limits of recursion relations of colored superpolynomials of links, and study their properties.

  17. Administración inmediata versus tardía de antibióticos de amplio espectro antes del ingreso a la unidad de cuidados intensivos para la sepsis severa en adultos

    Directory of Open Access Journals (Sweden)

    Shahla Siddiqui

    2011-05-01

    Conclusiones de los autores: Basado en esta revisión no se pueden hacer recomendaciones sobre el uso inmediato o tardío de los antibióticos de amplio espectro en los pacientes adultos con sepsis grave en el SU antes del ingreso en la UCI. Es necesario realizar ensayos controlados aleatorios doble ciegos prospectivos amplios sobre la eficacia de la administración inmediata (en una hora versus tardía de antibióticos de amplio espectro en los pacientes adultos con sepsis grave. Como tiene sentido comenzar los antibióticos tan pronto como sea posible en este grupo de pacientes gravemente enfermos, la administración inmediata de tales antibióticos en contraposición a la administración tardía se basa en pruebas anecdóticas subóptimas.

  18. High dispersion spectra for planetary nebula studies

    Directory of Open Access Journals (Sweden)

    Lawrence H. Aller

    2002-01-01

    Full Text Available Mapas de alta resoluci on en radio, im agenes directas con el Telescopio Espacial Hubble y observaciones con grandes telescopios con optica adaptiva muestran que las nebulosas planetarias tienen formas extremadamente complicadas y son muy diferentes de la simplicidad con que se las imaginaba tiempo atr as. Para atender este problema, uno debe obtener espectros con alta resoluci on espacial y alta dispersi on. Tambi en se requieren largos tiempos de exposiciones, a un con telescopio grandes, para observar las estructuras d ebiles. Basados en nuestro trabajo de alta dispersi on revisamos brevemente el diagn ostico del plasma y a posibilidad de utilizar iones de hierro para este diagn ostico.

  19. Susceptibilidad a betalactámicos y resistencia por betalactamasas de espectro extendido (BLEE) en Enterobacteriaceae aisladas de reservorios ambientales de un hospital general en Cajamarca, Perú.

    OpenAIRE

    Rivera-Jacinto, Marco; Biólogo-Microbiólogo. Maestro en Ciencias. Laboratorio de Microbiología y Parasitología, Universidad Nacional de Cajamarca., Cajamarca.; Rodríguez-Ulloa, Claudia; Bióloga-Microbióloga. Maestra en Salud Pública. Laboratorio de Microbiología y Parasitología, Universidad Nacional de Cajamarca, Cajamarca.; Huayán-Dávila, Gladys; Bióloga-Microbióloga. Hospital Regional de Cajamarca. Cajamarca.; Mercado-Martínez, Pedro; Biólogo-Microbiólogo. Doctor en Ciencias Biomédicas. Universidad Nacional de Trujillo. Trujillo.

    2011-01-01

     Objetivos:Identificar enterobacterias en reservorios intrahospitalarios, evaluar su sensibilidad a betalactámicos y determinar su capacidad de producir betalactamasas de espectro extendido (BLEE), en el Hospital Regional de Cajamarca. Material y métodos: Se obtuvieron muestras mediante hisopado de grifos, lavatorios, mesas, camas y tablillas de historia clínica en las áreas de cirugía y pediatría; se recuperaron, aislaron e identificaron 45 cult...

  20. Comorbilidades psiquiátricas en los trastornos del espectro autista: estudio comparativo entre los criterios DSM-IV-TR y DSM-5

    Directory of Open Access Journals (Sweden)

    Marina Romero

    2016-01-01

    Full Text Available Antecedentes/Objetivo: Los Trastornos del Espectro Autista (TEA incluyen un grupo heterogéneo en cuanto a su presentación clínica, lo que supone un desafío a nivel de caracterización diagnóstica. Por consiguiente, el objetivo principal de la clasificación DSM-5 debería de ser identificar subgrupos de ASD que incluyan severidad y comorbilidades psiquiátricas. El objetivo principal de este estudio es explorar las comorbilidades diagnósticas que pueden ser relevantes como descriptores de fenotipos autistas así como la severidad de los síntomas de autismo y comparar los resultados de las diferentes criterios de clasificación entre el DSM-IV-TR y el DSM-5. Método: Se realiza un estudio comparati - vo de severidad y comorbilidades psiquiátricas entre una muestra con diagnóstico de Trastorno Generalizado del Desarrollo, según criterios DSM-IV-TR, y una muestra que cumplía también criterios para TEA según la clasificación DSM-5. La muestra fue obtenida en centros educativos ( n =123. Las comorbilidades psiquiátricas y la severidad de los síntomas se evaluaron a través del The Nisonger Child Behavior Rating Form , entrevista clínica y el Inventario de Trastorno del Espectro Autista, respectivamente. Las comorbi - lidades estudiadas fueron ansiedad, alteraciones de la conducta alimentaria, auto-agre - sividad, hetero-agresividad, autolesiones, trastorno obsesivo-compulsivo y déficit de atención e hiperactividad. Resultados: Se encontraron diferencias estadísticamente sig - nificativas entre ambos grupos para trastorno obsesivo-compulsivo , alteraciones de la conducta alimentaria y severidad . Conclusiones: Se apoya la hipótesis de que los indivi - duos que cumplen criterios diagnósticos según DSM-5 tienen mayor severidad sintomáti - ca, no sólo con respecto a los síntomas autistas centrales, sino también en relación con comorbilidades psiquiátricas.

  1. Estudio sísmico de los edificios agregados de obra de fábrica utilizando el método del espectro de capacidad

    Directory of Open Access Journals (Sweden)

    Moreno-González, R.

    2014-03-01

    Full Text Available In this work a study about the seismic behaviour of a set of masonry aggregates buildings located in the city of Barcelona, Spain, is presented. Considering the age of these buildings (more than 70 years two mechanical properties for the masonry were defined. The seismic action considered is defined by elastic response spectrum defined by Eurocode 8 for the seismic acceleration of Barcelona. To analyze these buildings the capacity spectrum method was used, from which the capacity curve and the fragility curves are obtained for evaluating the seismic expected damage. Damage probability matrices quantified the seismic damage and they are obtained from the fragility curves and the performance point. Considering that the city of Barcelona is located in an area of low seismicity, the results show an important seismic damage.Se presenta un estudio sobre el comportamiento sísmico de un conjunto de edificios agregados de obra de fábrica situados en la ciudad de Barcelona, España. Considerando la edad que tienen estos edificios (más de 70 años se definen dos propiedades mecánicas para la mampostería. La acción sísmica considerada se define a partir del espectro elástico de respuesta definido en el Eurocódigo 8 para la aceleración sísmica de Barcelona. Para analizar los edificios se utiliza el método del espectro de capacidad, a partir del cual se obtienen la curva de capacidad y las curvas de fragilidad para evaluar el daño sísmico esperado. Las matrices de probabilidad de daño cuantifican el daño sísmico y se obtienen a partir de las curvas de fragilidad y el punto de capacidad por demanda. Teniendo en cuenta que Barcelona se encuentra en una zona de baja sismicidad, los resultados obtenidos muestran un daño sísmico importante.

  2. Auditory hypersensitivity in children and teenagers with autistic spectrum disorder Hipersensibilidade auditiva em crianças e adolescentes com transtorno do espectro autista

    Directory of Open Access Journals (Sweden)

    Erissandra Gomes

    2004-09-01

    Full Text Available OBJECTIVE: To verify if the clinical behavior of auditory hypersensitivity, reported in interviews with parents/caregivers and therapists/teachers of 46 children and teenagers suffering from autistic spectrum disorder, correspond to audiological findings. METHOD: The clinical diagnosis for auditory hypersensitivity was investigated by means of an interview. Subsequently, a test of the acoustic stapedial reflex was conducted, and responses to intense acoustic stimulus in open field were observed. RESULTS: Of the 46 subjects, 11 (23.9% were clinically diagnosed as oversensitive to sound and only 2 showed discomfort when exposed to intense acoustic stimulus in open field. There was no statistically significant difference for the test of the ipsilateral acoustic stapedial reflex between the groups. CONCLUSION: Behavioral manifestations to sounds are not associated to hypersensitivity of the auditory pathways, but instead these are associated to difficulties in the upper processing, involving systems that usually are impaired in autistic spectrum patients, such as the limbic system.OBJETIVO: Verificar se o comportamento clínico de hipersensibilidade auditiva, relatado nas entrevistas com os pais/cuidadores e terapeutas/professores de crianças e adolescentes com transtorno do espectro autista, corresponde aos achados audiológicos. MÉTODO: O diagnóstico clínico para a hipersensibilidade auditiva foi investigado a partir do protocolo de entrevista. Após, foi utilizada a pesquisa do reflexo acústico estapédico e observadas as reações ao estímulo sonoro intenso em campo aberto. RESULTADOS: Dos 46 sujeitos, 11 (23,9% foram diagnosticados clinicamente como hipersensíveis ao som, e somente 2 demonstraram desconforto quando expostos ao estímulo sonoro intenso em campo aberto. Não houve diferença estatisticamente significante para a pesquisa do reflexo acústico estapédico ipsilateral entre os grupos. CONCLUSÃO: As manifesta

  3. Betalactamasas de espectro extendido tipo TEM y CTX-M en Klebsiella spp y Escherichia coli aisladas de superficies de ambientes hospitalarios

    Directory of Open Access Journals (Sweden)

    Marco Rivera-Jacinto

    Full Text Available El objetivo del estudio fue determinar el genotipo BLEE de 15 cepas de enterobacterias resistentes a betalactámicos, aisladas de superficies inanimadas y caracterizadas fenotípicamente como productoras de betalactamasas de espectro extendido. Previa evaluación y tamizaje de las cepas bacterianas, se hizo un PCR para amplificar fragmentos de 1078 pb y 544 pb correspondientes a BLEE tipo TEM y CTX-M. Once cepas presentaron ambos fragmentos a la vez y tres presentaron solamente blaCTX-M. En conclusión, se demostró la presencia de genes BLEE en cultivos de origen ambiental, algunos de los cuales podrían pertenecer a más de un tipo; esta información podría servir de base para implementar medidas de prevención que eviten la trasmisión de bacterias multirresistentes desde superficies inanimadas a los pacientes, principalmente en áreas hospitalarias críticas

  4. La inclusión educativa desde la voz de madres de estudiantes con Trastornos del Espectro Autista en una muestra chilena

    Directory of Open Access Journals (Sweden)

    Marcela Villegas Otárola

    2014-12-01

    Full Text Available El objetivo del estudio es mostrar la perspectiva de madres chilenas sobre la inclusión educativa de sus hijos escolarizados en centros de educación primaria, quienes presentan un Trastorno del Espectro Autista. Se recogen evidencias, desde la voz de las familias, que pueden servir como punto de partida para reflexionar sobre cómo avanzar hacia una educación más inclusiva y cómo contribuir a mejorar los apoyos que se brindan a estudiantes con discapacidad. El estudio se enmarca en un paradigma cualitativo de investigación, utilizando entrevistas no estructuradas para acceder a la información. Se ha contado con la participación de ocho madres chilenas de la Región de Valparaíso. Los resultados muestran que la valoración de la escolarización está estrechamente relacionada con el bienestar emocional, ámbito al que se le otorga mayor relevancia que al de los resultados académicos. Se destaca la importancia de los apoyos adaptados a las necesidades del sistema familiar.

  5. Betalactamasas de espectro extendido tipo TEM y CTX-M en Klebsiella spp y Escherichia coli aisladas de superficies de ambientes hospitalarios

    Directory of Open Access Journals (Sweden)

    Marco Rivera-Jacinto

    Full Text Available El objetivo del estudio fue determinar el genotipo BLEE de 15 cepas de enterobacterias resistentes a betalactámicos, aisladas de superficies inanimadas y caracterizadas fenotípicamente como productoras de betalactamasas de espectro extendido. Previa evaluación y tamizaje de las cepas bacterianas, se hizo un PCR para amplificar fragmentos de 1078 pb y 544 pb correspondientes a BLEE tipo TEM y CTX-M. Once cepas presentaron ambos fragmentos a la vez y tres presentaron solamente blaCTX-M. En conclusión, se demostró la presencia de genes BLEE en cultivos de origen ambiental, algunos de los cuales podrían pertenecer a más de un tipo; esta información podría servir de base para implementar medidas de prevención que eviten la trasmisión de bacterias multirresistentes desde superficies inanimadas a los pacientes, principalmente en áreas hospitalarias críticas

  6. Espectro de gotas de pulverização e controle de doenças em duas cultivares de trigo

    Directory of Open Access Journals (Sweden)

    Caroline Almeida Gulart

    2013-10-01

    Full Text Available O objetivo do trabalho foi determinar a influência do número de gotas na penetração dos fungicidas e na sua eficácia de controle em diferentes momentos de aplicação. O delineamento experimental utilizado foi de Blocos ao acaso em parcelas subsubdivididas em quatro repetições. Os tratamentos foram constituídos por duas cultivares de trigo, 'Fundacep Cristalino' e 'Fundacep Nova Era'; três pontas de pulverização: XR 11002, TJ 60 11002 e TX 8002 e o tratamento controle com e sem fungicida. Foi avaliada a densidade de gotas por centímetro quadrado, diâmetro mediano volumétrico (DMV, severidade das doenças, peso hectolitro e produtividade da cultura. O espectro de gotas gerado pela ponta de pulverização XR 11002, nas condições do presente trabalho, apresentaram os melhores resultados em termos de deposição de gotas, controle das doenças e produtividade nas duas cultivares de trigo. O controle das manchas foliares e ferrugem -da- folha do trigo proporciona proteção do potencial produtivo da cultura, variando em função da suscetibilidade de cultivares e da cobertura e penetração de fungicidas.

  7. INCLUSÃO ESCOLAR DE CRIANÇAS COM TRANSTORNO DO ESPECTRO AUTISTA: UMA REVISÃO SISTEMÁTICA DA LITERATURA

    Directory of Open Access Journals (Sweden)

    Cristiane Soares Cabral

    Full Text Available RESUMO: Este estudo teve como objetivo realizar uma revisão sistemática da literatura nacional e internacional quanto a artigos de periódicos científicos sobre a inclusão escolar de crianças com Transtorno do Espectro Autista (TEA, atentando-se para o período e o periódico, os temas investigados e suas metodologias. Foram localizados 25 estudos nacionais, nas bases LILACS, BVS, SCIELO e Portal de Periódicos da CAPES, publicados entre 1998 e 2014, e 92 internacionais, localizados nas bases EBSCOhost e Medline, publicados entre 1993 e 2013. As pesquisas nacionais e internacionais foram agrupadas de acordo com os temas de investigação e os seus objetivos. A maioria dos estudos localizados caracterizou-se como empírico e de abordagem qualitativa. De modo geral, a revisão da literatura realizada possibilitou o resgate de experiências sobre a inclusão escolar de crianças com TEA, além de esboçar um breve panorama dos principais temas que estão sendo investigados.

  8. O Fenótipo Ampliado do Autismo em genitores de crianças com Transtorno do Espectro Autista - TEA

    Directory of Open Access Journals (Sweden)

    Renata Giuliani Endres

    Full Text Available RESUMOPesquisadores têm identificado expressões mais leves de traços do Transtorno do Espectro do Autismo - TEA em pais e irmãos destes indivíduos, que são definidas como Fenótipo Ampliado do Autismo (FAA. Este estudo investigou o perfil de personalidade de 20 genitores de crianças com o diagnóstico de TEA, utilizando a Bateria Fatorial de Personalidade e o Broad Autism Phenotype Questionnaire. Os resultados apontam para a presença de alguns traços de personalidade (ex: tendência à rigidez e ao retraimento social que podem, em alguma medida, corresponder às áreas de comprometimento presentes no TEA. Estes achados refletem um campo promissor de estudos no Brasil, sobretudo porque se utilizou um instrumento brasileiro, ainda não empregado em investigações na área do autismo.

  9. O ESPECTRO DA FOME: SE METADE DA HUMANIDADE NÃO DORME, É POR MEDO DA OUTRA METADE QUE NÃO COME

    Directory of Open Access Journals (Sweden)

    Luciano Rogério do Espírito Santo Abrão

    2012-07-01

    Full Text Available Este ensaio tem por objetivo a realização de uma concisa análise da obra, Geografia da fome, o dilema brasileiro: pão ou aço que foi publicada em primeira edição no ano de 1946 logo após o mundo conhecer as desgraças da última grande guerra mundial. Livro clássico do Professor Josué de Castro Nela o autor realiza uma análise do espectro da fome investigando este fenômeno terrível nos quinze anos que precederam a sua publicação. Castro retrata os reflexos da fome em um Brasil subdesenvolvido que apresentava à época uma economia tipicamente colonial na qual se destacava o café e outros minguados produtos primários para exportação, e, nesse sentido, afirmava que fome e subdesenvolvimento são, na realidade, a mesma coisa.

  10. Neutron spectrum for neutron capture therapy in boron; Espectro de neutrones para terapia por captura de neutrones en boro

    Energy Technology Data Exchange (ETDEWEB)

    Medina C, D.; Soto B, T. G. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Programa de Doctorado en Ciencias Basicas, 98068 Zacatecas, Zac. (Mexico); Baltazar R, A. [Universidad Autonoma de Zacatecas, Unidad Academica de Ingenieria Electrica, Programa de Doctorado en Ingenieria y Tecnologia Aplicada, 98068 Zacatecas, Zac. (Mexico); Vega C, H. R., E-mail: dmedina_c@hotmail.com [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas, Zac. (Mexico)

    2016-10-15

    Glioblastoma multiforme is the most common and aggressive of brain tumors and is difficult to treat by surgery, chemotherapy or conventional radiation therapy. One treatment alternative is the Neutron Capture Therapy in Boron, which requires a beam modulated in neutron energy and a drug with {sup 10}B able to be fixed in the tumor. When the patients head is exposed to the neutron beam, they are captured by the {sup 10}B and produce a nucleus of {sup 7}Li and an alpha particle whose energy is deposited in the cancer cells causing it to be destroyed without damaging the normal tissue. One of the problems associated with this therapy is to have an epithermal neutrons flux of the order of 10{sup 9} n/cm{sup 2}-sec, whereby irradiation channels of a nuclear research reactor are used. In this work using Monte Carlo methods, the neutron spectra obtained in the radial irradiation channel of the TRIGA Mark III reactor are calculated when inserting filters whose position and thickness have been modified. From the arrangements studied, we found that the Fe-Cd-Al-Cd polyethylene filter yielded a ratio between thermal and epithermal neutron fluxes of 0.006 that exceeded the recommended value (<0.05), and the dose due to the capture gamma rays is lower than the dose obtained with the other arrangements studied. (Author)

  11. Effects of X-rays spectrum on the dose; Efectos del espectro de rayos X sobre la dosis

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez I, J. L.; Hernandez A, P. L.; Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico); Rivera M, T., E-mail: johann_greenday@hotmail.com [IPN, Centro de Investigacion en Ciencia Aplicada y Tecnologia Avanzada, Av. Legaria No. 694, 11500 Mexico D. F. (Mexico)

    2015-10-15

    The X-ray equipment for diagnosis comes in different sizes and shapes depending on the scan type to perform. The X-ray spectrum is the energy distribution of the beam photons and consists of a continuous spectrum of photons braking and discrete spectrum due to the characteristic photons. The knowledge of the X-rays spectrum is important to understand like they affect the voltage changes (k Vp), current (m A), time (s) and the type of filter in the interaction mechanisms between X-rays and patient's body, the image receptor or other material that gets in the beam. Across the spectrum can be estimated the absorbed dose in any point of the patient, the quality of the image and the scattered radiation (which is related to the dose received by the equipment operator). The Monte Carlo method was used by MCNP5 code to calculate the spectrum of X-rays that occurs when a monoenergetic electron beam of 250 keV interact with targets of Mo, Rh and W. The spectra were calculated with and without filter, and the values of ambient dose equivalent were estimated, as well as the air kerma. (Author)

  12. Pileup correction of microdosimetric spectra

    CERN Document Server

    Langen, K M; Lennox, A J; Kroc, T K; De Luca, P M

    2002-01-01

    Microdosimetric spectra were measured at the Fermilab neutron therapy facility using low pressure proportional counters operated in pulse mode. The neutron beam has a very low duty cycle (<0.1%) and consequently a high instantaneous dose rate which causes distortions of the microdosimetric spectra due to pulse pileup. The determination of undistorted spectra at this facility necessitated (i) the modified operation of the proton accelerator to reduce the instantaneous dose rate and (ii) the establishment of a computational procedure to correct the measured spectra for remaining pileup distortions. In support of the latter effort, two different pileup simulation algorithms using analytical and Monte-Carlo-based approaches were developed. While the analytical algorithm allows a detailed analysis of pileup processes it only treats two-pulse and three-pulse pileup and its validity is hence restricted. A Monte-Carlo-based pileup algorithm was developed that inherently treats all degrees of pileup. This algorithm...

  13. Correlation Functions and Power Spectra

    DEFF Research Database (Denmark)

    Larsen, Jan

    2006-01-01

    The present lecture note is a supplement to the textbook Digital Signal Processing by J. Proakis and D.G. Manolakis used in the IMM/DTU course 02451 Digital Signal Processing and provides an extended discussion of correlation functions and power spectra. The definitions of correlation functions...... and spectra for discrete-time and continuous-time (analog) signals are pretty similar. Consequently, we confine the discussion mainly to real discrete-time signals. The Appendix contains detailed definitions and properties of correlation functions and spectra for analog as well as discrete-time signals....... It is possible to define correlation functions and associated spectra for aperiodic, periodic and random signals although the interpretation is different. Moreover, we will discuss correlation functions when mixing these basic signal types. In addition, the note include several examples for the purpose...

  14. Absorption Spectra of Astaxanthin Aggregates

    CERN Document Server

    Olsina, Jan; Minofar, Babak; Polivka, Tomas; Mancal, Tomas

    2012-01-01

    Carotenoids in hydrated polar solvents form aggregates characterized by dramatic changes in their absorption spectra with respect to monomers. Here we analyze absorption spectra of aggregates of the carotenoid astaxanthin in hydrated dimethylsulfoxide. Depending on water content, two types of aggregates were produced: H-aggregates with absorption maximum around 390 nm, and J-aggregates with red-shifted absorption band peaking at wavelengths >550 nm. The large shifts with respect to absorption maximum of monomeric astaxanthin (470-495 nm depending on solvent) are caused by excitonic interaction between aggregated molecules. We applied molecular dynamics simulations to elucidate structure of astaxanthin dimer in water, and the resulting structure was used as a basis for calculations of absorption spectra. Absorption spectra of astaxanthin aggregates in hydrated dimethylsulfoxide were calculated using molecular exciton model with the resonance interaction energy between astaxanthin monomers constrained by semi-e...

  15. Infrared spectra of mineral species

    CERN Document Server

    Chukanov, Nikita V

    2014-01-01

    This book details more than 3,000 IR spectra of more than 2,000 mineral species collected during last 30 years. It features full descriptions and analytical data of each sample for which IR spectrum was obtained.

  16. Multiplicação in vitro de copo-de-leite: espectros de luz e sacarose Calla lily in vitro multiplication: spectrum of light and sucrose

    Directory of Open Access Journals (Sweden)

    Márcia de Nazaré Oliveira Ribeiro

    2009-11-01

    Full Text Available O espectro luminoso pode alterar a morfogênese das plantas por meio de uma série de processos mediados por receptores de luz, principalmente na região do vermelho e azul. O objetivo deste trabalho foi determinar um possível tipo de luz mais ativo que a luz branca, de forma a aumentar a eficiência da multiplicação in vitro de copo-de-leite e obter um nível ótimo de sacarose. Para isso, os tratamentos consistiram em quatro diferentes tipos de luz, sob os quais os explantes cresceram (branca, vermelha, azul e verde, fornecidos pelo espectro luminoso das lâmpadas fluorescentes coloridas T8 20W Ecolume 05/1 e sacarose (0; 15; 30; 45 e 60g L-1. O meio de cultura constituiu-se dos sais e das vitaminas de MS, adicionado de 5mg L-1 de BAP e 5,5g L-1 de ágar. O tipo de luz não influencia a multiplicação in vitro de copo-de-leite, e o maior número de brotos (2,0 é obtido em 45g L-1 de sacarose. Observou-se maior número de folhas em luz branca (3,8 e azul (2,9, com 15 e 60g L-1 de sacarose, respectivamente. Maior comprimento dos brotos (3,7cm foi observado em 60g L-1 de sacarose, e maior fitomassa fresca da parte aérea (1,07g foi observada com a utilização de 60g L-1 de sacarose.Light spectrum can modify plant morphogenesis through a number of processes mediated by light receptors, mainly in the red and blue region. The aim of this work was to determine a possible light type more active than the white light, and an optimized sucrose concentration, in order to increase the efficiency of the calla lily in vitro multiplication . To that end, the treatments consisted of four different light types (white, red, blue and green, under which the explants grew, supplied by colored T8 20W Ecolume 05/1 fluorescent lamps and various sucrose concentrations (0; 15; 30; 45 and 60g L-1. The culture medium contained MS salts and vitamins, added of 5mg L-1 BAP and 5.5g L-1 agar. The light type did not influence in vitro propagation of calla lily and there

  17. Espectro trófico de la tilapia Oreochromis aureus (Perciformes: Cichlidae en la presa Infiernillo, Michoacán-Guerrero, México

    Directory of Open Access Journals (Sweden)

    Ma. de Lourdes Jiménez-Badillo

    2000-06-01

    Full Text Available Se determinó el espectro trófico de la tilapia Oreochromis aureus (Steindachner 1864, a través del análisis del contenido estomacal de una muestra de 153 especímenes recolectados durante 1993. El estado de alimentación se evaluó por la proporción de grasa alrededor del estómago e intestino, la replexión gástrica y el coeficiente de condición. La evaluación cuantitativa del alimento, se realizó a través de los métodos Volumétrico (V y Frecuencia de Aparición (FA y los Indices Medio Volumétrico (IMV e Importancia Relativa (IIR, los cuales se combinaron para determinar el espectro trófico de la tilapia. Se determinó que su dieta en la presa Infiernillo está constituida por: detritus y plantas vasculares como alimentos preferentes; algas unicelulares como alimento secundario y peces, insectos, semillas de gramíneas, algas filamentosas, cladóceros, ostrácodos, rotíferos y copépodos, como alimentos ocasionales. Se detectaron diferencias alimentarias entre juveniles y adultos y variaciones en el consumo de elementos alimentarios en la época de secas y lluvias. Se concluye que Oreochromis aureus es una especie omnívora con preferencia hacia el detritus y los restos de plantas vasculares. La alimentación esta determinada por la abundancia de las presas en el medio y en los adultos se basa preferentemente en el detritus. La alimentación no es un factor que limite el desarrollo de la tilapia en la presa Infiernillo.The trophic spectrum of tilapia Oreochromis aureus (Steindachner 1864, was determined by stomach content analysis in 153 organisms collected during 1993 in Michoacán-Guerrero, México. The feeding status of the fish at the time of observation was evaluated by the examination of fat surrounding the gut, gastric replection and the condition coefficient. The quantitative evaluation of the food items was carried out by the combination of the following analysis: Frequency of Occurrence, Volumetric Method, Volumetric

  18. Perfil pragmático longitudinal de uma criança no espectro da neuropatia auditiva Longitudinal pragmatic profile of a child with auditory neuropathy spectrum disorder

    Directory of Open Access Journals (Sweden)

    Andreza Carolina Bretanha

    2011-06-01

    Full Text Available A maior parte da comunicação humana depende da conversão de ideias em linguagem, envolvendo a interação de todos os seus componentes - fonológico, semântico, sintático e pragmático. A pragmática estuda a relação entre o significado social da linguagem e seu conteúdo semântico, manifestado pelo ato comunicativo em si. O espectro da neuropatia auditiva gera uma dessincronia na condução nervosa, contribuindo para o prejuízo na percepção da fala. Na criança deficiente auditiva, o processo de aquisição e desenvolvimento da linguagem pode ser estimulado com a intervenção. O objetivo dessa pesquisa foi realizar acompanhamento longitudinal do uso das habilidades pragmáticas de comunicação por uma criança com espectro da neuropatia auditiva. A criança realizou intervenção fonoaudiológica por três anos na área de Audiologia Educacional. Foram gravadas conversações espontâneas, ao início de cada ano, transcritas e analisadas segundo protocolo de habilidades comunicativas verbais. Na gravação inicial, a criança apresentou maior número de habilidade de respostas diretas; porém, estas foram ampliadas com o fornecimento de respostas mais complexas ao longo da intervenção. Na última gravação, já propõe novos tópicos de discurso, realiza narrativas e argumentações. O surgimento de habilidades comunicativas refinadas é explicado pelo desenvolvimento da linguagem, que é potencializado pela terapia com deficientes auditivos. Pode-se concluir que para o caso apresentado a intervenção fonoaudiológica proporcionou melhora nas habilidades pragmáticas de comunicação.Human communication depends mostly on the conversion of ideas into language, involving the interaction among all its components - phonological, semantic, syntactic and pragmatic. Pragmatics studies the relationship between the social meaning of language and its semantic content, expressed by the communicative act itself. Auditory neuropathy

  19. Trastorno del espectro autista y trastorno específico del lenguaje ¿Dos entidades diferentes o un continuo de manifestaciones neuropsicológicas?

    Directory of Open Access Journals (Sweden)

    Newra Tellechea Rotta

    2013-09-01

    Full Text Available El estudio de los niños con retraso en el desarrollo del lenguaje amerita un gran conocimiento del desarrollo neurológico típico; muchas veces, niños con retraso del lenguaje pueden presentar dificultades sociales y conductuales y puede ser difícil, en especial en etapas tempranas, diferenciar entre trastorno del espectro autista (TEA y trastorno específico del lenguaje (TEL. Justamente por ello, teniendo en cuenta que muchas veces comparten síntomas comunes se ha postulado que estos trastornos podrían tener una base etiológica común. En este trabajo analizaré en base a una revisión de la literatura, los aspectos clínicos, los avances en técnicas de diagnóstico y las investigaciones más recientes en las áreas de los TEA y TEL con el objeto de aclarar aspectos que hagan a su diagnóstico más preciso. No obstante, a pesar de los importantes contribuciones en el área de la observación clínica y de estudios complementarios, quedan todavía muchas dificultades para poder identificar tempranamente a estos niños, en especial antes de los dos años de vida, momento en que aún no podemos definir más que si un niño está en riesgo de padecer autismo o si tiene solo un retraso en el desarrollo de su lenguaje con algunas dificultades sociales.

  20. CONCEPTOS GENERALES SOBRE ABA EN NIÑOS CON TRASTORNO DEL ESPECTRO AUTISTA General concepts concerning applied behaviour analysis (ABA in children suffering autistic spectrum disorders (ASD

    Directory of Open Access Journals (Sweden)

    Sandra Elizabeth Piñeros-Ortiz

    2012-03-01

    Full Text Available Los trastornos del espectro autista (TEA son entidades que generan discapacidad. Diversas intervenciones psicofarmacológicas y psicosociales modulan algunas de las alteraciones comportamentales asociadas y mejoran la calidad de vida de las personas afectadas y de sus cuidadores. La terapia ABA es una de las intervenciones psicosociales más conocidas y utilizada en población con TEA. Mediante de la formulación de preguntas clave y sus respuestas, este artículo realiza una breve descripción de los aspectos históricos, las principales características y los fundamentos teóricos del ABA. Se discuten los resultados de diversos estudios que señalan las limitaciones metodológicas de las investigaciones sobre la efectividad de esta terapia y sus implicaciones para la práctica clínica.Autistic spectrum disorders (ASD cause disability. Psychopharmacological and psychosocial interventions modulate some of the associated behavioural alterations and improve the quality of life for those affected and the people caring for them. Applied behaviour analysis (ABA therapy is one of the most well-known psychosocial interventions and is used with populations suffering ASD. This article gives a brief description of the historical aspects, the main characteristics and theoretical foundations regarding applied behaviour analysis (ABA by formulating key questions and their (expected responses. The results of some pertinent studies are discussed, pointing out the methodological limitations of research into the effectiveness of this therapy and its implications for clinical practice.

  1. A mediação lúdica no espectro autista: uma possibilidade comunicativa e de intervenção psicopedagógica

    Directory of Open Access Journals (Sweden)

    Ana Beatriz Machado de Freitas

    2009-04-01

    Full Text Available O artigo relata a experiência profissional da autora junto a três crianças com espectro autista que freqüentavam uma clínica-escola para pessoas com deficiência mental. Não havia, entretanto, um programa específico voltado às necessidades das crianças com quadro autístico. Propôs-se, então, um atendimento mais sistemático e diretivo. Foi percebido, entretanto, que antes de qualquer implementação era necessária a construção de vínculos. Assim, a autora iniciou atendimentos psicopedagógicos individualizados de cunho lúdico seguindo as predileções e focos de interesse de cada criança, procurando interagir e brincar. O objetivo prioritário passou a ser a constituição de vínculo interpessoal e com o espaço de modo a favorecer a percepção e interatividade com o meio – físico e humano. A autora partiu da premissa, ancorada na experiência pessoal e em fundamentos teóricos psicológicos e psicopedagógicos, que a atenção compartilhada, a comunicação e a aprendizagem se constituem à medida que o sujeito interage e aprende a brincar em contextos significativos e sob mediação, produzindo sentidos de afetividade. Palavras-chave: Autismo. Psicopedagogia. Educação Especial. Ludoterapia.

  2. Avaliação de Treino de Controle do Stress para Mães de Crianças com Transtornos do Espectro Autista

    Directory of Open Access Journals (Sweden)

    Glória de Fátima Araújo Moxotó

    2015-12-01

    Full Text Available ResumoO diagnóstico de transtorno do espectro autista (TEA em filhos tem sido descrito na literatura como razão de excessivo stress em suas mães. Como o Treino de Controle do Stress (TCS de Lipp, já foi adaptado com êxito para o atendimento de diversas populações de diferentes faixas etárias, o objetivo deste trabalho foi investigar a eficácia de uma adaptação do TCS para mães de crianças com TEA (TCS-MTEA na redução do stress desta população. Para isto comparou-se a presença e níveis de stress de vinte participantes, na faixa etária entre 20 e 50 anos, sendo dez submetidas a esta intervenção individual configurando uma amostra experimental (AE e outras dez que tiveram apenas níveis de stress avaliados no mesmo intervalo de tempo, configurando uma amostra controle (AC. As vinte participantes foram avaliadas antes e após o treino com o Inventário de Sintomas de Stress para Adultos de Lipp. Ao final da intervenção das dez participantes estressadas inicialmente na AE, sete estavam sem stress (70% e as outras três apresentaram redução do nível de stress (30% enquanto as dez da AC (100% continuavam estressadas. Conclui-se que o TCS-MTEA foi eficaz na redução do stress das participantes da AE.

  3. Comportamentos de Crianças do Espectro do Autismo com seus Pares no Contexto de Educação Musical

    Directory of Open Access Journals (Sweden)

    Paulyane Silva do NASCIMENTO

    2015-03-01

    Full Text Available o Transtorno do espectro do autismo (TEA é marcado por prejuízos nas áreas de interação social, comunicação, comportamento e processamento sensorial. Aspectos relacionados a prejuízos no repertório de interação social, bem como estratégias para torná-la mais adequada têm sido amplamente estudados. Dentre estas estratégias, as que utilizam música têm recebido atenção. O presente estudo tem como objetivo investigar os benefícios da educação musical ao desenvolvimento da interação social de crianças com seus pares, focando-se na qualidade e na frequência da apresentação de tais comportamentos. Participaram duas crianças com TEA, com idades de cinco e seis anos, em aulas de percussão em grupo. Os instrumentos utilizados foram a Ficha de dados sociodemográficos e de desenvolvimento, para traçar os perfis dos participantes; e o Protocolo de observação de comportamentos de crianças com TEA com seus pares, para a análise comportamental, durante oito aulas/percussão (240 minutos. Os resultados sugerem que ambos apresentaram tendência ao aumento de iniciativas e respostas espontâneas e à diminuição de comportamentos não funcionais. Verificou-se a ocorrência do uso de estereotipias para tentativas de/e interações, embora esporadicamente. Destacaram-se os papéis do contexto, dos perfis das crianças, e do manejo comportamental por adultos, na promoção de interações.

  4. “COOPEDALEANDO”: UNA ACTIVIDAD FÍSICA EN BICICLETA PARA NIÑOS Y NIÑAS CON TRASTORNOS DEL ESPECTRO AUTISTA

    Directory of Open Access Journals (Sweden)

    Irene María Villalba Urbaneja,

    2015-05-01

    Full Text Available Las personas con necesidades educativas especiales, particularmente con Trastornos del Espectro Autista (TEA, se han sentido alejados de las actividades físicas y lúdicas, a pesar de que la legislación vigente exige tenerlos en cuenta (Ley Orgánica 2/2006.El autismo es “una de las alteraciones más graves del desarrollo durante la primera infancia que constituye uno de los problemas más serios desde el punto de vista personal, familiar y social” (Crespo, 2001. Según señala el DSM-IV-TR (2000, los TEA son una serie de Trastornos Neuropsiquiátricos catalogados como Trastornos Generalizados del Desarrollo. Por todo ello, “todos los sujetos que presentan rasgos autistas tienen una enorme necesidad de practicar y desarrollar sus capacidades motoras de manera regular y el deterioro de las mismas es consecuencia de su discapacidad en establecer mecanismos propios para desarrollarlas por medio de juegos, educación psicomotriz o actividad física” (Molina, 2006.“Coopedalenado” fue una propuesta físico-educativa llevada a cabo con los niños y niñas de la Asociación Autismo Palencia durante el año 2014 en las instalaciones deportivas del Complejo Universitario de La Yutera, Palencia.Objetivos: Desarrollar las Habilidades Motrices Básicas y las Habilidades Perceptivas de los participantes, Mejorar las Habilidades Sociales a partir de actividades físicas específicamente diseñadas; Adquirir una mayor autonomía en el área psíquico y sensorial a partir de su estimulación.

  5. Enterobacterias productoras de betalactamasas de espectro extendido en muestras fecales en el Instituto Nacional de Salud del Niño, Perú

    Directory of Open Access Journals (Sweden)

    Fabiola Colquechagua Aliaga

    Full Text Available Objetivos. Describir la frecuencia de enterobacterias productoras de betalactamasas de espectro extendido (BLEE en muestras fecales en el Instituto Nacional de Salud del Niño, Lima, Perú. Materiales y métodos. Se analizaron muestras de heces recibidas entre julio de 2012 y marzo de 2013, se trabajó con colonias sospechosas de ser enterobacterias productoras de BLEE que se desarrollaron en el agar Karmali; se realizó la identificación bioquímica por métodos convencionales y la confirmación del fenotipo BLEE. El análisis genotípico para detectar el gen de betalactamasa de la familia CTX-M se realizó por PCR. Resultados. De 235 muestras fecales se aisló un 64,2% de enterobacterias productoras de BLEE siendoEscherichia coli 86,1%, Klebsiella pneumoniae 7,9%, Salmonella sp. 2,6%, Enterobacter cloacae 2,0% y Proteus mirabilis 1,3%. El 89,1% de las enterobacterias productoras de BLEE presentaron el gen blaSe encontró una alta resistencia al ácido nalidíxico 84,8%, ciprofloxacina 74,2% y trimetoprim- CTX-M . sulfametoxazol 81,5%. La resistencia a la amikacina fue de 1,3% y todos los aislados fueron sensibles al imipenem y meropenem. Conclusiones. Se encontró una alta frecuencia de enterobacterias productoras de BLEE en muestras fecales de pacientes ambulatorios atendidos en los consultorios externos y emergencia del Instituto Nacional de Salud del Niño en Perú

  6. Avaliação do Comportamento Motor em Crianças com Transtorno do Espectro do Autismo: uma Revisão Sistemática

    Directory of Open Access Journals (Sweden)

    Angélica Miguel SOARES

    2015-09-01

    Full Text Available RESUMOObjetivou-se analisar por meio de revisão sistemática da literatura evidências de pesquisas que apresentem instrumentos de avaliação do comportamento motor em crianças com transtorno do espectro do autismo. Tratou-se de uma revisão sistemática, tendo como critérios de inclusão: artigos originais, do tipo pesquisa de campo, sem determinação cronológica. As buscas foram feitas no Lilacs, PubMed, Scielo, Google Acadêmico e Periódicos CAPES, utilizando-se os descritores: Transtorno autístico, Atividade Motora, Educação Física e Teste. Encontrou-se 3.164 textos na busca inicial, selecionando-se 06 que preencheram os critérios estabelecidos. Observou-se que as publicações sobre o assunto ainda são limitadas, visto que se evidenciou a necessidade de instrumentos específicos para avaliação do comportamento motor em tal público. Referente à credibilidade dos instrumentos encontrados, ficou claro a preocupação dos autores com instrumentos que sejam adequados à população, apesar da limitação no que tange à construção e validação de instrumentos que se detenham exclusivamente à avaliação do comportamento motor desses indivíduos, visto que são crianças que tem as funções de desenvolvimento afetadas e sua etiologia ainda é pouco conhecida. Por fim, há necessidade de estudos que abordem especificamente instrumentos com tais características, tendo uma maneira direcionada de intervir para a melhoria do comportamento motor de tal população.

  7. VALE-Emotions: Aplicación móvil de enseñanza para individuos con Desordenes del Espectro Autista

    Directory of Open Access Journals (Sweden)

    Diana Olmedo-Vizueta

    2017-02-01

    Full Text Available En este artículo, se presenta el desarrollo de una aplicación móvil interactiva para fortalecer el aprendizaje de reconocimiento de emociones en niños con Desordenes del Espectro Autista (ASD, en inglés. Esta App forma parte de un Avanzado Ambiente Virtual de Aprendizaje (VALE, en inglés, propuesto por los autores para soportar actividades de enseñanza y aprendizaje. La App VALE-Emotions está fundamentada en las seis emociones básicas estudiadas por (Paul Ekman, 1992, pero no está limitada solo al reconocimiento de tales emociones en sus máximos niveles de intensidad. De hecho, la App permite determinar el reconocimiento efectivo de estas emociones a diferentes niveles de intensidad. Tales niveles de intensidad son generados por una codificación propuesta por los autores mediante un DFE (Expresiones Faciales Dinámicas, en español usando avatars virtuales. Cada actividad de aprendizaje es realizada a través de aplicaciones de entrenamiento y evaluación, dando la oportunidad a los usuarios de desarrollar, aprender y fortalecer libremente habilidades sociales de una manera entretenida.  Además, se reportan los resultados de experimentación usando VALE-Emotions en individuos con ASD. En general, los participantes mostraron una eficiente respuesta a los estímulos durante las actividades desarrolladas obteniendo un alto y rápido reconocimiento de ciertas emociones.

  8. Complex Spectra in Fusion Plasmas

    Energy Technology Data Exchange (ETDEWEB)

    Hellermann, M.G. von; Jaspers, R. [FOM-Institute for Plasma Physics Rijnhuizen, Nieuwegein (Netherlands); Bertschinger, G.; Biel, W.; Marchuk, O. [Forschungszentrum Juelich GmbH (Germany). Inst. fuer Plasmaphysik; Giroud, C.; Zastrow, K.D. [UKAEA Culham Laboratory Euratom Association, Abingdon (United Kingdom); Jupen, C. [Univ. of Lund (Sweden). Physics Dept.; O' Mullane, M.; Summers, H.P.; Whiteford, A. [Univ. of Strathclyde, Glasgow (United Kingdom). Applied Physics Dept.

    2005-12-15

    The need for quantitative evaluation of complex line emission spectra as observed in hot fusion plasmas initiated a challenging development of sophisticated interpretation tools based on integrating advanced atomic modelling with detailed treatment of the plasma environment. The successful merging of the two worlds has led to routine diagnostic procedures which have contributed enormously to the understanding of underlying plasma processes and also to a wide acceptance of spectroscopy as a reliable diagnostic method. In this paper three characteristic types of spectra of current and continuing interest are presented. The first is that of medium/heavy species with many ionisation stages revealed in survey VUV and XUV spectra. Such species occur as control gases, as wall materials, as ablated heavy species and possible as layered wall dopants for monitoring erosion. The spectra are complex with line-like and quasi-continuum regions and are amenable to advanced ?pattern recognition' methods. The second type is of few electron, highly ionised systems observed as line-of-sight integrated passive emission spectra in the soft X-ray region. They are analysed successfully in terms of plasma parameters through matching of observation with predicted synthetic spectra. Examples used here include highly resolved helium-like emission spectra of argon, iron and titanium observed on the tokamaks TEXTOR and Tore Supra. The third type, and the emphasis of this work, comprises spectra linked to active beam spectroscopy, that is, charge exchange recombination spectroscopy (CXRS) and beam emission spectroscopy (BES). In this case, a complex spectrum is again composed of a (usually) dominating active spectrum and an underlying passive emission spectrum. Its analysis requires modelling of both active and passive features. Examples used here are from the CXRS diagnostic at JET and TEXTOR. They display characteristic features of the main light impurity ions (C{sup +6}, He{sup +2}, N

  9. Qualitative interpretation of galaxy spectra

    CERN Document Server

    Almeida, J Sanchez; Terlevich, E; Fernandes, R Cid; Morales-Luis, A B

    2012-01-01

    We describe a simple step-by-step guide to qualitative interpretation of galaxy spectra. Rather than an alternative to existing automated tools, it is put forward as an instrument for quick-look analysis, and for gaining physical insight when interpreting the outputs provided by automated tools. Though the recipe is of general application, it was developed for understanding the nature of the Automatic Spectroscopic K-means based (ASK) template spectra. They resulted from the classification of all the galaxy spectra in the Sloan Digital Sky Survey data release 7 (SDSS-DR7), thus being a comprehensive representation of the galaxy spectra in the local universe. Using the recipe, we give a description of the properties of the gas and the stars that characterize the ASK classes, from those corresponding to passively evolving galaxies, to HII galaxies undergoing a galaxy-wide starburst. The qualitative analysis is found to be in excellent agreement with quantitative analyses of the same spectra. A number of byprodu...

  10. Measurements of the neutron energy spectra in the core of IPEN/MB-01 reactor; Medida do espectro de energia dos neutrons no nucleo do reator IPEN/MB-01

    Energy Technology Data Exchange (ETDEWEB)

    Martins, Fernando Prat Goncalves

    2006-07-01

    This work presents the neutron spectrum measurements in the Reactor IPEN/MB-01 using very thin activation detectors in the metallic form, in reactor core, in moderator region. An articulated device allows that the foils are inserted in the central position of reactor core, ensuring that all the foils are irradiated in the same position. The activation detectors of different materials such Au{sup 197}, Mg{sup 24}, Ti{sup 4}'8, In{sup 115}, Sc{sup 45} and others, were selected to cover a large range of neutron spectrum. After the irradiation, the activation detectors were submitted to a spectrometry gamma by using a system of counting with high purity Germanium, to obtain the saturation activity per target nuclide. The saturation activity is one of the main data of input of unfolding code SANDBP, that through an iterative adjustment, modify the spectrum that better agree with the dataset of code input, composition mainly for measure reaction rate per target nuclide and a initial input spectrum, calculated for Hammer-Technion code, supplying a solution spectrum. (author)

  11. Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts

    Directory of Open Access Journals (Sweden)

    Arnaldo da C. Faro Jr

    2010-01-01

    Full Text Available Bulk and supported molybdenum based catalysts, modified by nickel, phosphorous or tungsten were studied by NEXAFS spectroscopy at the Mo L III and L II edges. The techniques of principal component analysis (PCA together with a linear combination analysis (LCA allowed the detection and quantification of molybdenum atoms in two different coordination states in the oxide form of the catalysts, namely tetrahedral and octahedral coordination.

  12. Powderspec, a program for the efficient simulation of spectra of electron paramagnetic resonance of powders with orthorhombic symmetry; Powderspec, un programa para la simulacion eficiente de espectros de resonancia paramagnetica electronica de polvos con simetria ortorrombica

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez T, L.; Beltran L, V

    1991-09-15

    In this report a FORTRAN source program which simulates the second order powder pattern and spectrum of electron paramagnetic resonance (EPR) in crystal fields with orthorhombic symmetry using Gauss-Legendre quadratures is given. Also the commentaries which describe each step in detail are presented. (Author)

  13. Determination of interplanar distances starting from diffraction spectra for the Cyber computer of the ININ; Determinacion de distancias interplanares a partir de espectros de difraccion para la computadora Cyber del ININ

    Energy Technology Data Exchange (ETDEWEB)

    Macias B, L.R

    1991-04-15

    To identify a compound by means of diffraction it is required to obtain it spectrum or diffractogram that it is not more than a graphic I/I{sub o} vs. 2 {theta}. Since this analysis type is carried out on samples of glasses, it is expected that when impacting the radiation on the sample and to vary the angles {theta} and 2 {theta}, and when being completed the Bragg law, constructive interference it exists among all the radiation beams that emerge of the sample and take place the diffraction. In this work the diffractogram is identified by means of a graph equipment (x,t) that directly obtains the graphic I/I{sub o} vs. 2 {theta} and in this it has to be carried out angular measurement of the present peaks and later on with the data 2 {theta}{sub i} it was proceeds to compare with the totally identified patterns as the contents in the Powder Diffraction File of the Joint Committee on Powder Diffraction Standards (JCPDS). (Author)

  14. Determination of the neutron spectra in the treatment room of a linear accelerator for radiotherapy; Determinacion de los espectros de neutrones en la sala de tratamiento de un acelerador lineal para radioterapia

    Energy Technology Data Exchange (ETDEWEB)

    Vega C, H.R. [Universidad Autonoma de Zacatecas, Cuerpo Academico de Radiobiologia, A.P. 336, 98000 Zacatecas (Mexico); Barquero, R. [Hospital Universitario Rio Hortega, Valladolid (Spain); Mendez, R.; Iniguez, M.P. [Depto. de Fisica Teorica, Atomica, Molecular y Nuclear, Universidad de Valladolid, 47011 Valladolid (Spain)

    2003-07-01

    By means of a series of measures and Monte Carlo calculations the dosimetric characteristics of the photoneutrons have been determined that take place in volume to a linear accelerator of radiotherapy of 18 MV, LINAC, mark Siemens Mevatron model. The measures were carried out with thermoluminescent dosemeters TLD 600 and TLD 700 that were naked exposed and confined with cover of Cd and Sn, inside a sphere of paraffin and inside spheres Bonner. (Author)

  15. Accelerated Fitting of Stellar Spectra

    CERN Document Server

    Ting, Yuan-Sen; Rix, Hans-Walter

    2016-01-01

    Stellar spectra are often modeled and fit by interpolating within a rectilinear grid of synthetic spectra to derive the stars' labels: stellar parameters and elemental abundances. However, the number of synthetic spectra needed for a rectilinear grid grows exponentially with the label space dimensions, precluding the simultaneous and self-consistent fitting of more than a few elemental abundances. Shortcuts such as fitting subsets of parameters separately can introduce unknown systematics and do not produce correct error covariances in the derived labels. In this paper we present a new approach -- CHAT (Convex Hull Adaptive Tessellation) -- which includes several new ideas for inexpensively generating a sufficient stellar synthetic library, using linear algebra and the concept of an adaptive, data-driven grid. A convex hull approximates the region where the data lie in the label space. A variety of tests with mock datasets demonstrate that CHAT can reduce the number of required synthetic model calculations by...

  16. QUALITATIVE INTERPRETATION OF GALAXY SPECTRA

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez Almeida, J.; Morales-Luis, A. B. [Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife (Spain); Terlevich, R.; Terlevich, E. [Instituto Nacional de Astrofisica, Optica y Electronica, Tonantzintla, Puebla (Mexico); Cid Fernandes, R., E-mail: jos@iac.es, E-mail: abml@iac.es, E-mail: rjt@ast.cam.ac.uk, E-mail: eterlevi@inaoep.mx, E-mail: cid@astro.ufsc.br [Departamento de Fisica-CFM, Universidade Federal de Santa Catarina, P.O. Box 476, 88040-900 Florianopolis, SC (Brazil)

    2012-09-10

    We describe a simple step-by-step guide to qualitative interpretation of galaxy spectra. Rather than an alternative to existing automated tools, it is put forward as an instrument for quick-look analysis and for gaining physical insight when interpreting the outputs provided by automated tools. Though the recipe is for general application, it was developed for understanding the nature of the Automatic Spectroscopic K-means-based (ASK) template spectra. They resulted from the classification of all the galaxy spectra in the Sloan Digital Sky Survey data release 7, thus being a comprehensive representation of the galaxy spectra in the local universe. Using the recipe, we give a description of the properties of the gas and the stars that characterize the ASK classes, from those corresponding to passively evolving galaxies, to H II galaxies undergoing a galaxy-wide starburst. The qualitative analysis is found to be in excellent agreement with quantitative analyses of the same spectra. We compare the mean ages of the stellar populations with those inferred using the code STARLIGHT. We also examine the estimated gas-phase metallicity with the metallicities obtained using electron-temperature-based methods. A number of byproducts follow from the analysis. There is a tight correlation between the age of the stellar population and the metallicity of the gas, which is stronger than the correlations between galaxy mass and stellar age, and galaxy mass and gas metallicity. The galaxy spectra are known to follow a one-dimensional sequence, and we identify the luminosity-weighted mean stellar age as the affine parameter that describes the sequence. All ASK classes happen to have a significant fraction of old stars, although spectrum-wise they are outshined by the youngest populations. Old stars are metal-rich or metal-poor depending on whether they reside in passive galaxies or in star-forming galaxies.

  17. Avaliação de linguagem e de teoria da mente nos transtornos do espectro do autismo com a aplicação do teste strange stories traduzido e adaptado para a língua portuguesa

    OpenAIRE

    Velloso,Renata de Lima

    2012-01-01

    Os Transtornos do Espectro do Autismo (TEA) se caracterizam por prejuízos significativos na interação social, na comunicação verbal e não verbal e pela ausên-cia de atividades imaginativas, substituídas por comportamentos repetitivos e este-reotipados. Os pesquisadores vêm há muitos anos propondo teorias explicativas do prejuízo primário nos TEA, prevalecendo atualmente duas vertentes teóricas: a teo-ria desenvolvimentista e a teoria cognitivista. O objetivo deste estudo foi a avaliação de ha...

  18. La Terapia Asistida con Caballos mejora las competencias establecidas en el currículum de Educación Infantil en una niña con Trastorno del Espectro Autista

    OpenAIRE

    Cid Castaño, Claudia

    2016-01-01

    [ES]La presente investigación se centra en demostrar, a partir de datos cuantificables, que la Terapia Asistida con Caballos contribuye de forma positiva a la mejora de las competencias establecidas en el currículum de Educación Infantil en una niña con Trastorno del Espectro Autista. Dicha terapia, emergente en nuestro país, utiliza al caballo como agente motivador y facilita al terapeuta el trabajo con la persona con dificultades. El caballo es un ser maravilloso, con una gran capacidad...

  19. Reacções psicológicas e estratégias de coping parentais, face ao diagnóstico de perturbação do espectro do autismo, de um filho

    OpenAIRE

    2008-01-01

    Dissertação de Mestrado apresentada ao Instituto Superior de Psicologia Aplicada para obtenção de grau de Mestre na especialidade de Psicologia Clínica. Os Transtornos Globais do Desenvolvimento (TGD) caracterizam-se pelo comprometimento da interacção social, pelo uso estereotipado da linguagem e pela presença de comportamentos repetitivos com interesses restritos. O presente estudo objectivou investigar se o tempo de diagnóstico de perturbação do espectro do autismo, de um fil...

  20. Influencia de la resiliencia en la sobrecarga subjetiva de madres cuidadoras de niños con trastorno de espectro autista de la asociación “Mírame”, Arequipa 2015

    OpenAIRE

    Seperak Viera, Rosa Angelica

    2016-01-01

    El presente artículo expone los resultados del análisis de la influencia de la resiliencia en la sobrecarga subjetiva de madres con niños que padecen el Trastorno de Espectro Autista. El objetivo principal fue conocer el carácter predictivo de la resiliencia en la sobrecarga subjetiva, asimismo, conocer los niveles de resiliencia y sobrecarga subjetiva en las madres. Para ello se tomó una muestra de 50 madres cuidadoras primarias informales, pertenecientes a una asociación de a...

  1. Estudio electrofisiológico y electroacústico de un desorden del espectro de neuropatía auditiva: Reporte de un caso en recién nacido de alto riesgo

    OpenAIRE

    Cañete S,Oscar; Aránguiz L,Fabiola

    2011-01-01

    El desorden del espectro de neuropatía auditiva (DENA) describe una condición en la cual se observa o se ha observado emisiones otoacústicas (EOA) junto con potenciales evocados auditivos de tronco (PEAT) anormales o ausentes. Su identificación se basa en la presencia de potencial microfónico coclear (PMIC) junto con un PEAT anormal o ausente y EOA presentes o antecedentes de su presencia. Los umbrales tonales pueden encontrarse entre los rangos de normalidad hasta pérdidas auditivas profunda...

  2. La detección precoz de Trastornos del Espectro Autista (TEA). El programa de cribado con M-CHAT en España y revisión de otros programas en Europa

    OpenAIRE

    2015-01-01

    [ES]Los Trastornos del Espectro Autista (TEA) constituyen un conjunto de alteraciones graves del desarrollo neurológico que se caracterizan por la concurrencia de dificultades en la interacción social y en la comunicación y por patrones restringidos y repetitivos de comportamiento, siendo una de las discapacidades del desarrollo más frecuentes en la infancia temprana. El trabajo aquí presentado es una compilación de cuatro publicaciones (un capítulo de libro en español y 3 artículos, 2 de ell...

  3. Estudio del espectro de infrarrojo y la relajación vibracional de péptidos en disolución acuosa= Study of the IR spectrum and the vibrational relaxation of peptides in water solution

    OpenAIRE

    Hamdi Abdelrahman Farag, Marwa

    2012-01-01

    En la presente tesis presentamos un estudio teórico del espectro infrarrojo y de la relajación vibracional de péptidos modelo disueltos en agua. Los péptidos son descritos utilizando campos de fuerza estándar de Mecánica Molecular y también Hamiltonianos electrónicos semiempíricos. El analisis de los ujos de energía vibracional intra e intermoleculares se realiza utilizando los Modos Normales Instantáneos. Así mismo se propone una nueva metodología para trazar su identidad durant...

  4. Funções executivas em crianças e adolescentes com transtorno do espectro do autismo: uma revisão = Executive functions in children and adolescents with autism spectrum disorder: a revision

    OpenAIRE

    2013-01-01

    Esse artigo consiste em uma revisão sistemática de estudos publicados entre 2001 e 2011, envolvendo avaliação neuropsicológica das funções executivas em crianças e adolescentes com Transtorno do Espectro do Autismo (TEA). Com base nos critérios de inclusão dessa pesquisa, nove estudos foram encontrados, a partir dos termos neuropsychology e executive functions, combinados ao termo autism, nos indexadores LILACS, PubMed e PsycINFO. A análise dos estudos apontou uma tendência de disfunções exec...

  5. Espectro clínico-mutacional y estudios de correlación genotipo-fenotipo en la población española afectada de lipofuscinosis neuronal ceroidea

    OpenAIRE

    Pérez Poyato, María del Socorro

    2012-01-01

    Las lipofuscinosis neuronal ceroidea (LNCs) constituyen uno de los grupos de enfermedades neurodegenerativas de herencia autosómica recesiva más frecuentes en la infancia. Presentan variabilidad en la edad de inicio y comparten amplio espectro fenotípico: epilepsia, déficit visual, deterioro motor y cognitivo progresivos con fallecimiento a edad precoz. Se han identificado ocho genes responsables de las diferentes formas clínicas en la edad pediátrica (CLN10/CTSD, CLN1/PPT1, CLN2/TPP1, CLN3, ...

  6. Health in informal caregivers of people with Autism Spectrum Disorder: intervention effects = Salud en cuidadores informales de personas con Trastorno del Espectro Autista: efectos de la intervención

    OpenAIRE

    Ruiz Robledillo, Nicolás

    2015-01-01

    Introducción En las últimas décadas se ha producido un incremento alarmante de la prevalencia del Trastorno del Espectro Autista (TEA) (Elsabbagh et al., 2012), caracterizado por dificultades en la socialización, la comunicación y un patrón de intereses y conductas restringidos y repetitivos (American Psychiatric Association, 2013). La especificidad de la sintomatología característica del TEA y los problemas de conducta que conllevan se asocian generalmente a diversos grados de discapacida...

  7. Comportamento, fluência verbal e ritmos circadianos em indivíduos com o Transtorno do Espectro do Autismo (TEA) antes e após o uso de melatonina

    OpenAIRE

    2016-01-01

    As características comuns ao quadro do Transtorno do Espectro do Autismo (TEA) destacadas pelo DSM-5 são: déficit de comunicação, dificuldade em fazer amizades ou se relacionar, dependência de rotina, resistência a mudanças e obsessão por itens inapropriados. Tais comportamentos podem ser observados desde a infância, porém com variações em cada indivíduo, o que levou o TEA a ser considerado um “continuum” que varia de menos comprometido (leve) a muito comprometido (grave). Dentre a complexa s...

  8. Espectro de las manifestaciones orales de VIH/SIDA en la región de Perm (Rusia) e identificación de lesiones orales linguales ulceronecrotizantes inducidas

    OpenAIRE

    Gileva, Olga S.; Sazhina, Marina V.; Gileva, Evgenja S.; Efimov, Andrey V.; Scully, Crispian

    2004-01-01

    -Objetivo: estudiar la frecuencia y el espectro de las manifestaciones orales de consumidores de drogas infectados por VIH en la región de Perm. -Sujetos: 104 consumidores de droga seropositivos (69 hombres, 35 mujeres; edades desde 15 a 32; 13 co-infectados con virus de la hepatitis) y 13 consumidores de droga con SIDA (7 hombres, 6 mujeres; edades entre 16 y 37; 12 co-infectados con virus de la hepatitis). -Resultados: las formas más frecuentes de lesiones de la muco...

  9. La Evaluacion del Desarrollo de las Capacidades de Referencia Conjunta a Través de una Intervención Basada en Prácticas Musicales en un Niño con Trastorno de Espectro de Autismo

    OpenAIRE

    Benavides,Hernán; Orrego,Pablo

    2010-01-01

    Esta investigación pretende contrastar los efectos de la música en el desarrollo de las capacidades de referencia conjunta en un niño con trastorno de espectro de autismo. Para ello se llevó a cabo un programa de intervención focalizada, desarrollado a partir de recursos musicoterapéuticos, la que constituye nuestra variable independiente. El método empleado integró distintas actividades dirigidas a desarrollar la capacidad de referencia conjunta del niño, la variable dependiente. Para la con...

  10. Health in informal caregivers of people with Autism Spectrum Disorder: intervention effects = Salud en cuidadores informales de personas con Trastorno del Espectro Autista: efectos de la intervención

    OpenAIRE

    Ruiz Robledillo, Nicolás

    2015-01-01

    Introducción En las últimas décadas se ha producido un incremento alarmante de la prevalencia del Trastorno del Espectro Autista (TEA) (Elsabbagh et al., 2012), caracterizado por dificultades en la socialización, la comunicación y un patrón de intereses y conductas restringidos y repetitivos (American Psychiatric Association, 2013). La especificidad de la sintomatología característica del TEA y los problemas de conducta que conllevan se asocian generalmente a diversos grados de discapacida...

  11. Comparación de cuatro métodos fenotípicos para la detección de beta-lactamasas de espectro extendido Comparison of four phenotypic methods to detect extended-spectrum betalactamases

    OpenAIRE

    Lizet Lezameta; Edgar Gonzáles-Escalante; Jesús H. Tamariz

    2010-01-01

    Objetivo. Comparar la eficacia de cuatro métodos fenotípicos para la identificación de cepas productoras de β-lactamasas de espectro extendido aisladas de urocultivos. Materiales y métodos. Estudio comparativo de corte transversal. Se analizó 147 cepas aisladas de urocultivos positivos para Escherichia coli, Klebsiella pneumoniae y Proteus mirabilis entre los meses de enero y febrero de 2009 en el Instituto Nacional de Salud del Niño, las cuales fueron sometidas a una prueba de tamizaje,...

  12. Classical Trajectories and Quantum Spectra

    Science.gov (United States)

    Mielnik, Bogdan; Reyes, Marco A.

    1996-01-01

    A classical model of the Schrodinger's wave packet is considered. The problem of finding the energy levels corresponds to a classical manipulation game. It leads to an approximate but non-perturbative method of finding the eigenvalues, exploring the bifurcations of classical trajectories. The role of squeezing turns out decisive in the generation of the discrete spectra.

  13. Missing levels in correlated spectra

    CERN Document Server

    Bohigas, O

    2004-01-01

    Complete spectroscopy (measurements of a complete sequence of consecutive levels) is often considered as a prerequisite to extract fluctuation properties of spectra. It is shown how this goal can be achieved even if only a fraction of levels are observed. The case of levels behaving as eigenvalues of random matrices, of current interest in nuclear physics, is worked out in detail.

  14. Squeezed States and Helmholtz Spectra

    CERN Document Server

    Francisco Delgado, C; Reyes, M A; Mielnik, Bogdan; Reyes, Marco A

    1997-01-01

    The 'classical interpretation' of the wave function psi(x) reveals an interesting operational aspect of the Helmholtz spectra. It is shown that the traditional Sturm-Liouville problem contains the simplest key to predict the squeezing effect for charged particle states.

  15. Universal Behavior in Dirac Spectra

    CERN Document Server

    Verbaarschot, J J M

    1997-01-01

    In these lectures we review recent results on universal fluctuations of QCD Dirac spectra and applications of Random Matrix Theory (RMT) to QCD. We review general properties of Dirac spectra and discuss the relation between chiral symmetry breaking and correlations of Dirac eigenvalues. In particular, we will focus on the microscopic spectral density density, i.e. the spectral density near zero virtuality on the scale of a typical level spacing. The relation with Leutwyler-Smilga sum-rules will be discussed. The success of applications of RMT to spectra of 'complex' systems leads us to the introduction of a chiral Random Matrix Theory (chRMT) with the global symmetries of the QCD partition function. Our central conjecture is that it decribes correlations of QCD Dirac spectra. We will review recent universality proofs supporting this conjecture. Lattice QCD results for the microscopic spectral density and for correlations in the bulk of the spectrum are shown to be in perfect agreement with chRMT. We close wit...

  16. Gallery of Planetary Nebula Spectra

    CERN Document Server

    Kwitter, K B; Kwitter, Karen B.; Henry, Richard B.C.

    2006-01-01

    We present the Gallery of Planetary Nebula Spectra now available at http://oitwilliams.edu/nebulae. The website offers high-quality, moderate resolution (~7-10 A FWHM) spectra of 128 Galactic planetary nebulae from 3600-9600 A, obtained by Kwitter, Henry, and colleagues with the Goldcam spectrograph at the KPNO 2.1-m or with the RC spectrograph at the CTIO 1.5-m. The master PN table contains atlas data and an image link. A selected object's spectrum is displayed in a zoomable window; line identification templates are provided. In addition to the spectra themselves, the website also contains a brief discussion of PNe as astronomical objects and as contributors to our understanding of stellar evolution. We envision that this website, which concentrates a large amount of data in one place, will be of interest to a variety of users: researchers might need to check the spectrum of a particular object of interest; the non-specialist astronomer might simply be interested in perusing such a collection of spectra; and...

  17. Vibrational spectra of ordered perovskites

    NARCIS (Netherlands)

    Corsmit, A.F.; Hoefdraad, H.E.; Blasse, G.

    1972-01-01

    The vibrational spectra of the molecular M6+O6 (M = Mo, Te, W) group in ordered perovskites of the type Ba2M2+M6+O6 are reported. These groups have symmetry Oh, whereas their site symmetry is also Oh. An assignment of the internal vibrations is presented.

  18. Spectra of sodium aluminate solutions

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The UV spectra of sodium aluminate solutions were obtained in the sodium oxide concentration range from 59 to 409 g/L and the caustic ratio range from 1.5 to 4.0 to reveal the structure characteristics of them. It is found that a new peak appears at about 370 nm besides peaks at about 220 and 266 nm in all solutions. The new peak is strongly favored by high hydroxide concentration and high caustic ratio. And it only appears when the solutions are prepared by dissolving sodium hydroxide and aluminum hydroxide.In addition, the IR and Raman spectra of sodium aluminate solutions with high alkali concentration and high caustic ratio were measured, and the UV spectra of aqueous solutions of Al(H2O)63+ and AlF63- were measured as well. According to the crystal field theory in coordination chemistry as well as the above spectra characteristics, this new peak at about 370 nm is determined as the evidence of a new species of aluminate ion with a coordination number of 6.

  19. Adaptação materna ao transtorno do espectro autismo: relações entre crenças, sentimentos e fatores psicossociais = Maternal adaptation to autism spectrum disorder: relationships between beliefs, feelings and psychosocial factors = Adaptación materna al trastorno del espectro autista: las relaciones entre las creencias, los sentimientos y los factores psicosociales

    Directory of Open Access Journals (Sweden)

    Meimes, Maíra Ainhoren

    2015-01-01

    Full Text Available Crenças e sentimentos relacionados ao desenvolvimento do filho com Transtorno do Espectro Autismo (TEA exercem importante papel na adaptação materna. Entretanto, estes fatores nem sempre são compreendidos com base nos aspectos psicossociais associados. Objetivo: investigar crenças e sentimentos de mães de crianças com TEA relacionando-os a fatores psicossociais, com base no metamodelo biopsicossocial de Bradford. Delineamento: estudo de casos múltiplos, transversal e exploratório. Participantes: quatro mães (idade: 38 a 45 anos de meninos com TEA (idades: 3 anos e 5 meses a 6 anos e 9 meses. Instrumentos: Entrevista de Percepção Materna, Entrevista de Dados Demográficos e Desenvolvimento Infantil e Questionário de Saúde Geral de Goldberg (QSG. Resultados: crenças maternas sobre o desenvolvimento infantil, capacidade para identificar habilidades e seu senso de autoeficácia relacionam-se a diversos fatores psicossociais, como percepção dos recursos intra e extrafamiliares, qualidade dos sistemas de saúde. Discute-se que o impacto do diagnóstico pode ser mediado pelos fatores psicossociais

  20. Una década de políticas de gestión del espectro radioeléctrico en la Unión Europea (1997-2007). Análisis de las consultas públicas, el marco normativo y las prioridades estratégicas

    OpenAIRE

    Bonet Bagant, Montse; Civil i Serra, Marta; Llinés, Montserrat

    2008-01-01

    En este artículo se repasan los principales documentos que, en la última década, han contribuido a iniciar el proceso de liberalización del espectro radioeléctrico en Europa y a situarlo como eje y motor de desarrollo social y, especialmente, económico. Durante este periodo, el espectro radioeléctrico pasa de ser un bien escaso (como siempre se había asegurado para justificar la existencia de monopolios públicos u oligopolios privados) a ser un bien limitado. Aunque sutil, esta diferencia mar...

  1. Prevalencia y factores de riesgo para infecciones del tracto urinario de inicio en la comunidad causadas por Escherichia coli productor de betalactamasas de espectro extendido en Colombia

    Science.gov (United States)

    Blanco, Victor M.; Maya, Juan J.; Correa, Adriana; Perenguez, Marcela; Muñoz, Juan S.; Motoa, Gabriel; Pallares, Christian J.; Rosso, Fernando; Matta, Lorena; Celis, Yamile; Garzon, Martha; Villegas, y María V.

    2016-01-01

    RESUMEN Introducción Las infecciones del tracto urinario (ITU) son frecuentes en la comunidad. Sin embargo, la información de aislamientos resistentes en este contexto es limitada en Latinoamérica. Este estudio tiene como objetivo determinar la prevalencia y los factores de riesgo asociados con ITU de inicio en la comunidad (ITU-IC) causadas por Escherichia coli productor de betalactamasas de espectro extendido (BLEE) en Colombia. Materiales y métodos Entre agosto y diciembre de 2011 se realizó un estudio de casos y controles en 3 instituciones de salud de tercer nivel en Colombia. Se invitó a participar a todos los pacientes admitidos a urgencias con diagnóstico probable de ITU-IC, y se les pidió una muestra de orina. En los aislamien-tos de E. coli se realizaron pruebas confirmatorias para BLEE, susceptibilidad antibiótica, caracterización molecular (PCR en tiempo real para genes bla, repetitive element palindromic PCR [rep-PCR], multilocus sequence typing [MLST] y factores de virulencia por PCR). Se obtuvo información clínica y epidemiológica, y posteriormente se realizó el análisis estadístico. Resultados De los 2.124 pacientes seleccionados, 629 tuvieron un urocultivo positivo, en 431 de estos se aisló E. coli, 54 fueron positivos para BLEE y 29 correspondieron a CTX-M-15. La mayoría de los aislamientos de E. coli productor de BLEE fueron sensibles a ertapenem, fosfomicina y amikacina. La ITU complicada se asoció fuertemente con infecciones por E. coli productor de BLEE (OR = 3,89; IC 95%: 1,10–13,89; p = 0,03). E. coli productor de CTX-M-15 mostró 10 electroferotipos diferentes; de estos, el 65% correspondieron al ST131. La mayoría de estos aislamientos tuvieron 8 de los 9 factores de virulencia analizados. Discusión E. coli portador del gen blaCTX-M-15 asociado al ST131 sigue siendo frecuente en Colombia. La presencia de ITU-IC complicada aumenta el riesgo de tener E. coli productor de BLEE, lo cual debe tenerse en cuenta para ofrecer

  2. Determinación de b-lactamasas de espectro extendido en gérmenes nosocomiales del Hospital San Jerónimo, Montería.

    Directory of Open Access Journals (Sweden)

    Pedro Martínez

    2009-11-01

    Full Text Available Objetivo: Este estudio tuvo como objetivos establecer la prevalencia de b-lactamasas de espectro extendido (BLEE en bacilos Gram negativos nosocomiales y comparar tres métodos para su identificación. Materiales y métodos: Se estudiaron en el Hospital San Jerónimo (HSJ de Montería durante los años 2001 y 2002, 201 microorganismos aislados de pacientes con infección nosocomial. Para identificar la presencia de BLEE se tuvo en cuenta la actividad hidrolítica sobre la ceftazidima que midió el sinergismo del ácido clavulánico en combinación con ceftazidima. Para comparar los métodos de identificación de BLEE, se utilizaron los propuestos por el National Committee for Clinical Laboratory Standards (NCCLS difusión de disco, la concentración mínima inhibitoria (CMI90 y el método de combinación de disco de Jarlier. Resultados: Los resultados mostraron que 86 (43% de 201 gérmenes fueron productores de BLEE. Se presentaron BLEE en 24 (63% de 38 Acinetobacter baumannii, 11 (61% de 18 Enterobacter spp, 17 (46% de 37 Klebsiella pneumoniae, 22 (38% de 58 Pseudomonas aeruginosa, 5 (31% de 16 Proteus mirabilis y 7 (20.5% de 34 Escherichia coli. Al comparar los métodos de identificación no se presentaron diferencias entre si (p>0.05. Los resultados muestran una prevalencia alta de BLEE (43% en los bacilos Gram negativos nosocomiales del HSJ de Montería. Conclusiones: El estudio logró demostrar la importancia de los métodos de identificación de BLEE como apoyo para la correcta instauración de la terapia antimicrobiana en gérmenes nosocomiales y sobre esta base sugerir la implementación de medidas de vigilancia que prevengan y disminuyan la diseminación de BLEE en este hospital.

  3. Ascaridíase biliar complicada: espectro de problemas e táticas cirúrgicas Biliary ascariasis: spectrum of surgical problems and tactics

    Directory of Open Access Journals (Sweden)

    Lisieux Eyer de Jesus

    2004-06-01

    Full Text Available OBJETIVO: Discutir as variantes clínicas e táticas para tratamento cirúrgico da ascaridíase biliar complicada. MÉTODO: Trabalho retrospectivo de pacientes operados por complicações de ascaridíase biliar num período de cinco anos. RESULTADOS: São descritos quatro casos de ascaridíase biliar complicada em crianças (três pré escolares e um escolar, expressos através de pseudocisto pancreático, icterícia obstrutiva, colangite e múltiplos abscessos hepáticos, todos tratados cirurgicamente. Descrevemos detalhes técnicos da abordagem operatória para cada um dos casos. CONCLUSÕES: O espectro das afecções biliares secundárias à ascaridíase é variável e é necessário um arsenal de táticas operatórias para a abordagem de cada caso. É desaconselhável o uso de anti-helmínticos antes da resolução clínica da invasão da via biliar. A afecção preferencial de crianças jovens exige o uso de técnicas e materiais adequadamente delicados para a manipulação das vias biliares.BACKGROUND: To discuss the clinical expression and technical variations involved in the surgical treatment of complicated biliary ascariasis. METHODS: Retrospective study of patients operated on to treat complicated biliopancreatic ascariasis in a five year period. RESULTS: We describe four cases of complicated biliary ascariasis affecting children (three pre-schoolers and one school-aged child, clinically expressed as pancreatic pseudocyst, obstructive icterus, cholangitis and multiple hepatic abscesses, all surgically treated. We discuss aspects of operative treatment for each one of these patients. CONCLUSION: There are many variations concerning clinical and surgical presentations of biliary ascariasis, and a number of surgical tactics are necessary to solve those cases. We are against the use of anti-helmintics before the clearance of biliary passages. Preferential compromise of young children makes it necessary to use adequate and miniaturized

  4. Determination voltage applied to an X-ray tube using the spectrum; Determinacao da tensao aplicada em um tubo de raios-X usando o espectro

    Energy Technology Data Exchange (ETDEWEB)

    Albuquerque, M.A.G.; David, M.G.; Almeida, Carlos Eduardo de; Magalhaes, Luis Alexandre Goncalves, E-mail: malbuqueque@hotmail.com [Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ (Brazil). Lab. de Ciencias Radiologicas; Peixoto, Guilherme [Instituto de Radioprotecao e Dosimetria (IRD/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

    2015-07-01

    This work shows the methodology used to determine the voltage applied in an X-ray tube using their spectra. The measurements were made using a detector Cadmium telluride . Before the measurements are carried out detector was calibrated with a source of {sup 241}Am. After obtaining the spectra , the mean energies were calculated , the electron accelerating potential (k Vp ) of each spectrum is constructed a calibration straight for the kVp this tube. (author)

  5. Phobos surface spectra mineralogical modeling

    Science.gov (United States)

    Pajola, M.; Lazzarin, M.; Dalle Ore, C. M.; Cruikshank, D. P.; Roush, T. L.; Pendleton, Y.; Bertini, I.; Magrin, S.; Carli, C.; La Forgia, F.; Barbieri, C.

    2014-04-01

    A mineralogical model composed of a mixture of Tagish Lake meteorite (TL) and Pyroxene Glass (PM80) was presented in [1] to explain the surface reflectance of Phobos from 0.25 to 4.0 μm. The positive results we obtained, when comparing the OSIRIS data [2] extended in wavelength to include the [3,4] spectra, forced us to perform a wider comparison between our TL-PM80 model and the CRISM and OMEGA Phobos spectra presented in [5]. Such spectra cover three different regions of interest (ROIs) situated in the Phobos sub-Mars hemisphere: the interior of the Stickney crater, its eastern rim, and its proximity terrain southeast of the Reldresal crater. We decided to vary the percentage mixture of the components of our model (80% TL, 20% PM80), between pure TL and pure PM80, by means of the radiative transfer code based on the [6] formulation of the slab approximation. Once this spectral range was derived, see Fig. 1, we attempted to compare it with the [5] spectra between 0.4 and 2.6 μm, i.e. below the thermal emitted radiation, to see if any spectral match was possible. We observed that CRISM scaled spectra above 1.10 μm fall within pure Tagish Lake composition and the [1] model. The CRISM data below 1.10 μm present more discrepancies with our models, in particular for the Stickney's rim spectrum. Nevertheless the TL and PM80 components seem to be good mineralogical candidates on Phobos. We performed the same analysis with the OMEGA data and, again, we found out that the Stickney's rim spectrum lies out of our model range, while the two remaining spectra still lie between pure TL and 80% TL - 20% PM80, but indicating that a different, more complicated mixture is expected in order to explain properly both the spectral trend and the possible absorption bands located above 2.0 μm. Within this analysis, we point out that a big fraction of TL material (modeled pure or present with a minimum percentage of 80% mixed together with 20% PM80) seems to explain Phobos spectral

  6. Eigenvectors of optimal color spectra.

    Science.gov (United States)

    Flinkman, Mika; Laamanen, Hannu; Tuomela, Jukka; Vahimaa, Pasi; Hauta-Kasari, Markku

    2013-09-01

    Principal component analysis (PCA) and weighted PCA were applied to spectra of optimal colors belonging to the outer surface of the object-color solid or to so-called MacAdam limits. The correlation matrix formed from this data is a circulant matrix whose biggest eigenvalue is simple and the corresponding eigenvector is constant. All other eigenvalues are double, and the eigenvectors can be expressed with trigonometric functions. Found trigonometric functions can be used as a general basis to reconstruct all possible smooth reflectance spectra. When the spectral data are weighted with an appropriate weight function, the essential part of the color information is compressed to the first three components and the shapes of the first three eigenvectors correspond to one achromatic response function and to two chromatic response functions, the latter corresponding approximately to Munsell opponent-hue directions 9YR-9B and 2BG-2R.

  7. Phonon spectra in quantum wires

    Directory of Open Access Journals (Sweden)

    Ilić Dušan

    2007-01-01

    Full Text Available Green's function method, adjusted to bound crystalline structures, was applied to obtain the phonon dispersion law in quantum wires. The condition of the existence of small mechanical atom movements defining phonon spectra can be found by solving the secular equation. This problem was presented graphically for different boundary parameters. The presence of boundaries, as well as the change of boundary parameters, leads to the appearance of new properties of the layered structure. The most important feature is that, beside the allowed energy zones (which are continuous as in the bulk structure, zones of forbidden states appear. Different values of the boundary parameters lead to the appearance of lower and upper energy gaps, or dispersion branches spreading out of the bulk energy zone. The spectra of phonons in corresponding unbound structures were correlated to those in bound structures.

  8. Espectro óculo-aurículo-vertebral em pacientes com defeitos cardíacos congênitos Espectro óculo-aurículo-vertebral en pacientes con defectos cardíacos congénitos Oculo-auriculo-vertebral spectrum in patients with congenital heart defects

    Directory of Open Access Journals (Sweden)

    Rafael Fabiano Machado Rosa

    2010-10-01

    Full Text Available FUNDAMENTO: Há poucos estudos avaliando a frequência do espectro óculo-aurículo-vertebral (EOAV nos pacientes com defeitos cardíacos congênitos (DCC. OBJETIVO: Verificar a frequência do EOAV em uma amostra de pacientes com malformações cardíacas graves. MÉTODOS: Avaliamos uma coorte prospectiva de pacientes com DCC, admitidos em uma unidade de terapia intensiva (UTI cardiopediátrica no Brasil. O diagnóstico de EOAV foi feito com base em dados clínicos, considerando critérios padrões. Os pacientes que preenchiam esses critérios foram submetidos ao cariótipo de alta resolução com bandamento GTG e hibridização fluorescente in situ para a microdeleção 22q11.2. O teste exato de Fisher (P FUNDAMENTO: Hay pocos estudios evaluando la frecuencia del espectro óculo-aurículo-vertebral (EOAV en los pacientes con defectos cardíacos congénitos (DCC. OBJETIVO: Verificar la frecuencia del EOAV en una muestra de pacientes con malformaciones cardíacas graves. MÉTODOS: Evaluamos una cohorte prospectiva de pacientes con DCC, admitidos en una unidad de terapia intensiva (UTI cardiopediátrica en el Brasil. El diagnóstico de EOAV fue hecho con base en datos clínicos, considerando criterios estándares. Los pacientes que llenaban esos criterios fueron sometidos al cariotipo con bandeamiento GTG en alta resolución e Hibridización fluorescente in situ para la microdelección 22q11.2. El Test Exacto de Fisher (P BACKGROUND: There have been few studies evaluating the frequency of oculo-auriculo-vertebral spectrum (OAVS in patients with congenital heart defects (CHDs. OBJECTIVE: To verify the frequency of OAVS in a sample of patients with major heart malformations. METHODS: We evaluated a prospective cohort of patients with CHD admitted in a pediatric cardiac intensive care unit (ICU in Brazil. The diagnosis of OAVS was made based on the clinical data, considering standard criteria. The patients that met these criteria were submitted to

  9. Analysing degeneracies in networks spectra

    CERN Document Server

    Marrec, Loïc

    2016-01-01

    Many real-world networks exhibit a high degeneracy at few eigenvalues. We show that a simple transformation of the network's adjacency matrix provides an understanding of? the origins of occurrence of high multiplicities in the networks spectra. We find that the eigenvectors associated with the degenerate eigenvalues shed light on the structures contributing to the degeneracy. Since these degeneracies are rarely observed in model graphs, we present results for various cancer networks. This approach gives an opportunity to search for structures contributing to degeneracy which might have an important role in a network.

  10. Rotational spectra and molecular structure

    CERN Document Server

    Wollrab, James E

    1967-01-01

    Physical Chemistry, A Series of Monographs: Rotational Spectra and Molecular Structure covers the energy levels and rotational transitions. This book is divided into nine chapters that evaluate the rigid asymmetric top molecules and the nuclear spin statistics for asymmetric tops. Some of the topics covered in the book are the asymmetric rotor functions; rotational transition intensities; classes of molecules; nuclear spin statistics for linear molecules and symmetric tops; and classical appearance of centrifugal and coriolis forces. Other chapters deal with the energy levels and effects of ce

  11. Gamma-ray burst spectra

    Science.gov (United States)

    Teegarden, B. J.

    1982-01-01

    A review of recent results in gamma-ray burst spectroscopy is given. Particular attention is paid to the recent discovery of emission and absorption features in the burst spectra. These lines represent the strongest evidence to date that gamma-ray bursts originate on or near neutron stars. Line parameters give information on the temperature, magnetic field and possibly the gravitational potential of the neutron star. The behavior of the continuum spectrum is also discussed. A remarkably good fit to nearly all bursts is obtained with a thermal-bremsstrahlung-like continuum. Significant evolution is observed of both the continuum and line features within most events.

  12. Infrared Spectra of Polycyclic Aromatic Hydrocarbons (PAHs)

    Science.gov (United States)

    Bauschlicher, Charles W., Jr.; Bakes, E. L. O.

    2000-01-01

    We have computed the synthetic infrared spectra of some polycyclic aromatic hydrocarbons containing up to 54 carbon atoms. The species studied include ovalene, circumcoronene, dicoronylene, and hexabenzocoronene. We report spectra for anions, neutrals, cations, and multiply charged cations.

  13. Fine Spectra of Symmetric Toeplitz Operators

    Directory of Open Access Journals (Sweden)

    Muhammed Altun

    2012-01-01

    Full Text Available The fine spectra of 2-banded and 3-banded infinite Toeplitz matrices were examined by several authors. The fine spectra of n-banded triangular Toeplitz matrices and tridiagonal symmetric matrices were computed in the following papers: Altun, “On the fine spectra of triangular toeplitz operators” (2011 and Altun, “Fine spectra of tridiagonal symmetric matrices” (2011. Here, we generalize those results to the (2+1-banded symmetric Toeplitz matrix operators for arbitrary positive integer .

  14. Duality properties between spectra and tilings

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Spectra and tilings play an important role in analysis and geometry respectively.The relations between spectra and tilings have bafied the mathematicians for a long time.Many conjectures,such as the Fuglede conjecture,are placed on the establishment of relations between spectra and tilings,although there are no desired results.In the present paper we derive some characteristic properties of spectra and tilings which highlight certain duality properties between them.

  15. Fine Structure in the Mm-Wavelength Spectra of the Active Region

    Science.gov (United States)

    Sawant, H. S.; Cecatto, J. R.

    1990-11-01

    RESUMEN. Faltan observaciones solares espectrosc6picas en la longitud de onda milimetrica. Hay sugerencias de que se puede superponer una fi na estructura en frecuencia a la componente-S de la regi6n solar activa, asi como a la componente del brote en las longitudes de onda milimetri- cas. Se ha desarrollado un receptor de alta sensibilidad de pasos de frecuencia que opera en el intervalo de 23-18 GHz con una resoluci6n de 1 GHz y resoluci6n de tiempo variable entre 1.2 y 96 sec, usando la an- tena de Itapetinga de 13.7-m para estudiar la estructura fina en frecuencia y tiempo. Discutimos el espectro en longitud de onda-mm en re- giones activas y su evoluci6n en el tiempo. El estudio de Ia evoluci6n en el tiempo de la regi6n activa en AR 5569 observada el 29 de junio de 1989, sugiere la existencia de estructuras finas como funci6n deltiempo. ABSTRACT. There is a lack of mm-wavelength spectroscopic solar observations. There are suggestions that a fine structure in frequency may be superimposed on the S-component of solar active region as well as on the burst component at inm-wavelengths. To study fine structure in frequency and time, a high sensitivity step frequency receiver operating in the frequency range 23-18 GHz with frequency resolution of 1 GHz and variable time resolution 1.2 to 96 sec, using 13.7 m diameter Itapetinga radome covered antenna, has been developed. Here, we discuss mm-wavelength spectra of active regions and their time evolution. Study of time evolution of an active region AR 5569 observed on 29th June, 1989 suggests existence of fine structures as a function of time. ( Ck : SUN-ACTIVITY - SUN-RADIO RADIATION

  16. Espectro óculo-aurículo-vertebral e malformações cardíacas Oculo-auriculo-vertebral spectrum and cardiac malformations

    Directory of Open Access Journals (Sweden)

    Rafael Fabiano Machado Rosa

    2010-01-01

    Full Text Available OBJETIVO: Verificar a frequência e tipos de cardiopatias congênitas em uma amostra de pacientes portadores de espectro óculo-aurículo-vertebral (EOAV, tentando correlacionar a presença desta malformação com suas demais características clínicas e evolução. MÉTODOS: A amostra foi composta por 33 indivíduos, todos atendidos em um mesmo centro, no período de janeiro de 1975 a dezembro de 2007. Vinte e dois deles eram do sexo masculino e 11 do feminino e suas idades variaram de 1 dia a 17 anos. Todos apresentavam avaliação cariotípica normal por bandas GTG. Realizou-se uma coleta de dados referentes à sua história clínica, exame físico e resultado de avaliações complementares. RESULTADOS: Anormalidades cardíacas foram observadas em 13 pacientes (39,4%. Dessas, cinco (38,5% eram do tipo conotruncal, sendo o principal defeito a tetralogia de Fallot (n=2. Malformações não usuais identificadas incluíram o cor triatriatum e a dupla via de entrada de ventrículo esquerdo. Diferenças significativas entre as características clínicas do grupo com e sem cardiopatia foram verificadas somente em relação à idade na primeira avaliação, que foi mais baixa naqueles com malformações cardíacas. Cinco indivíduos foram a óbito, quatro deles portadores desses defeitos. CONCLUSÃO: Malformações cardíacas, em especial dos tipos conotruncal e septal, são frequentes entre pacientes com EOAV. A frequência encontrada em nosso estudo foi estatisticamente similar à da maior parte dos trabalhos descritos na literatura, que oscila de 18% a 58%. As cardiopatias congênitas também representam a principal causa de óbito desses indivíduos. Portanto, uma avaliação cardiológica, especialmente precoce, deveria ser sempre realizada nesses pacientes.OBJECTIVE: To verify the frequency and types of congenital heart defects in a sample of patients with oculo-auriculo-vertebral spectrum (OAVS, in an effort to correlate presence of these

  17. Software para enseñar emociones al alumnado con trastorno del espectro autista Software for Teaching Emotions to Students with Autism Spectrum Disorder

    Directory of Open Access Journals (Sweden)

    Josefina Lozano Martínez

    2011-03-01

    Full Text Available En este artículo se presentan los resultados de una investigación en la que se ha utilizado un software educativo para apoyar el proceso de enseñanza y aprendizaje de competencias emocionales y sociales en alumnado con trastornos del espectro autista (TEA escolarizado en educación primaria y secundaria. Los participantes, con dificultades en el reconocimiento de estados emocionales, han sido nueve alumnos de edades comprendidas entre los 8 y 18 años, de ambos sexos y con un rango de índice de edad mental entre 5 y 7 años de edad. Para ello, se utilizó un diseño de grupo único con pretest-postest. Así, antes del proceso de enseñanza, el alumnado fue evaluado con relación a sus niveles de competencia emocional y social, con la finalidad de establecer, también, el nivel de inicio del proceso de enseñanza para cada uno de ellos. El proceso de enseñanza se desarrolló a lo largo de dos sesiones semanales de 45 minutos, cada una, en un intervalo de dos cursos académicos (2006/08. Tras el proceso de intervención educativa, los alumnos fueron nuevamente evaluados. Los resultados obtenidos confirman que la utilización del software educativo en la enseñanza de competencias emocionales y sociales ayuda a los alumnos a mejorar su capacidad para superar tareas encaminadas a la comprensión de competencias emocionales. Además, los participantes mejoraron sus competencias sociales ya que docentes y familiares apreciaron progresos significativos en esta área.This paper reports the results of a research project in which educational software was used to teach social and emotional skills to primary and secondary school students with autism spectrum disorders (ASD. The participants with difficulties in recognizing emotional states were nine male and female students aged between 8 and 18, with a mental age range of between 5 and 7 years. A single group design with pre-test/post-test was used. The students were assessed before teaching in

  18. Fast computation of morphological area pattern spectra

    NARCIS (Netherlands)

    Meijster, Arnold; Wilkinson, Michael H.F.

    2001-01-01

    An area based counterpart of the binary structural opening spectra is developed It is shown that these area opening and closing spectra can be computed using an adaptation of Tarjan's union-find algorithm These spectra provide rotation, translation, and scale invariant pattern vectors for texture

  19. Multiscale climate emulator of multimodal wave spectra: MUSCLE-spectra

    Science.gov (United States)

    Rueda, Ana; Hegermiller, Christie A.; Antolinez, Jose A. A.; Camus, Paula; Vitousek, Sean; Ruggiero, Peter; Barnard, Patrick L.; Erikson, Li H.; Tomás, Antonio; Mendez, Fernando J.

    2017-02-01

    Characterization of multimodal directional wave spectra is important for many offshore and coastal applications, such as marine forecasting, coastal hazard assessment, and design of offshore wave energy farms and coastal structures. However, the multivariate and multiscale nature of wave climate variability makes this complex problem tractable using computationally expensive numerical models. So far, the skill of statistical-downscaling model-based parametric (unimodal) wave conditions is limited in large ocean basins such as the Pacific. The recent availability of long-term directional spectral data from buoys and wave hindcast models allows for development of stochastic models that include multimodal sea-state parameters. This work introduces a statistical downscaling framework based on weather types to predict multimodal wave spectra (e.g., significant wave height, mean wave period, and mean wave direction from different storm systems, including sea and swells) from large-scale atmospheric pressure fields. For each weather type, variables of interest are modeled using the categorical distribution for the sea-state type, the Generalized Extreme Value (GEV) distribution for wave height and wave period, a multivariate Gaussian copula for the interdependence between variables, and a Markov chain model for the chronology of daily weather types. We apply the model to the southern California coast, where local seas and swells from both the Northern and Southern Hemispheres contribute to the multimodal wave spectrum. This work allows attribution of particular extreme multimodal wave events to specific atmospheric conditions, expanding knowledge of time-dependent, climate-driven offshore and coastal sea-state conditions that have a significant influence on local nearshore processes, coastal morphology, and flood hazards.

  20. Isolation of bacteriocin-producing lactic acid bacteria from meat and meat products and its spectrum of inhibitory activity Isolamento de bactérias lácticas produtoras de bacteriocinas a partir de carnes e produtos cárneos e seu espectro de atividade inibitória

    Directory of Open Access Journals (Sweden)

    Renata Bromberg

    2004-06-01

    Full Text Available A total of 285 samples of meat and meat products were evaluated for the presence of bacteriocin-producing lactic acid bacteria by the "sandwich" test. From 174 of these samples, 813 strains of lactic acid bacteria were isolated. They were able to inhibit the growth of Staphylococcus aureus CTC 33 and/or Listeria innocua Lin 11. When evaluated by the well-diffusion assay, 128 of these strains inhibited the growth of the indicator strains. The inhibitory spectra of activity of the isolates were evaluated against a range of Gram-positive and Gram-negative test organisms. S. aureus was the most sensitive indicator tested, whereas Enterococcus faecalis and Lactobacillus plantarum were the most resistant ones. All the compounds produced by the lactic acid bacteria were fully or partially inactivated by some of the proteolytic enzymes, which indicates their proteinaceous nature. The antimicrobial activity of the bacteriocins produced by the lactic acid bacteria isolated in this work could act as a potential barrier to inhibit the growth of spoilage bacteria and foodborne pathogens.Um total de 285 amostras de carnes e produtos cárneos foi avaliado para detecção de culturas produtoras de bacteriocinas pelo método do "sanduíche". A partir de 174 destas amostras, 813 linhagens de bactérias lácticas com atividade inibitória sobre Staphylococcus aureus CTC 033 e/ou Listeria innocua Lin 11 foram isoladas. Quando examinadas pelo método de antagonismo simultâneo em poços, 128 destas linhagens inibiram o crescimento dos microrganismos indicadores. O espectro de atividade das linhagens isoladas foi avaliado com diversos microrganismos Gram-positivos e Gram-negativos. De um modo geral, S. aureus foi o microrganismo indicador mais sensível, enquanto Enterococcus faecalis e Lactobacillus plantarum foram os mais resistentes. Todos os compostos antimicrobianos produzidos pelas bactérias lácticas testadas foram completa ou parcialmente inativados por

  1. Scikit-spectra: Explorative Spectroscopy in Python

    Directory of Open Access Journals (Sweden)

    Adam Hughes

    2015-06-01

    Full Text Available Scikit-spectra is an intuitive framework for explorative spectroscopy in Python. Scikit-spectra leverages the Pandas library for powerful data processing to provide datastructures and an API designed for spectroscopy. Utilizing the new IPython Notebook widget system, scikit-spectra is headed towards a GUI when you want it, API when you need it approach to spectral analysis. As an application, analysis is presented of the surface-plasmon resonance shift in a solution of gold nanoparticles induced by proteins binding to the gold’s surface. Please refer to the scikit-spectra website for full documentation and support: http://hugadams.github.io/scikit-spectra/

  2. Analysis of multi-layer ERBS spectra

    Energy Technology Data Exchange (ETDEWEB)

    Marmitt, G.G. [Atomic and Molecular Physics Laboratories, Research School of Physics and Engineering, The Australian National University, Canberra 0200 (Australia); Instituto de Fisica da Universidade Federal do Rio Grande do Sul, Avenida Bento Goncalves 9500, 91501-970 Porto Alegre, RS (Brazil); Rosa, L.F.S. [Instituto de Fisica da Universidade Federal do Rio Grande do Sul, Avenida Bento Goncalves 9500, 91501-970 Porto Alegre, RS (Brazil); Nandi, S.K. [Electronic Materials Engineering Department, Research School of Physics and Engineering, The Australian National University, Canberra 0200 (Australia); Research School of Astronomy and Astrophysics, The Australian National University, Canberra, ACT 2611 (Australia); Department of Physics, University of Chittagong, Chittagong 4331 (Bangladesh); Vos, M., E-mail: maarten.vos@anu.edu.au [Atomic and Molecular Physics Laboratories, Research School of Physics and Engineering, The Australian National University, Canberra 0200 (Australia)

    2015-07-15

    Highlights: • Electron Rutherford backscattering (ERBS) spectra are presented. • The spectra are fitted based on physical meaningful quantities. • Very consistent results are obtained for spectra taken under different conditions. • This establishes that ERBS can be used to measure film thicknesses. - Abstract: A systematic way of analysis of multi-layer electron Rutherford backscattering spectra is described. The approach uses fitting in terms of physical meaningful parameters. Simultaneous analysis then becomes possible for spectra taken at different incoming energies and measurement geometries. Examples are given to demonstrate the level of detail that can be resolved by this technique.

  3. Neutron and photon spectra in LINACs.

    Science.gov (United States)

    Vega-Carrillo, H R; Martínez-Ovalle, S A; Lallena, A M; Mercado, G A; Benites-Rengifo, J L

    2012-12-01

    A Monte Carlo calculation, using the MCNPX code, was carried out in order to estimate the photon and neutron spectra in two locations of two linacs operating at 15 and 18 MV. Detailed models of both linac heads were used in the calculations. Spectra were estimated below the flattening filter and at the isocenter. Neutron spectra show two components due to evaporation and knock-on neutrons. Lethargy spectra under the filter were compared to the spectra calculated from the function quoted by Tosi et al. that describes reasonably well neutron spectra beyond 1 MeV, though tends to underestimate the energy region between 10(-6) and 1 MeV. Neutron and the Bremsstrahlung spectra show the same features regardless of the linac voltage.

  4. Action spectra of zebrafish cone photoreceptors.

    Directory of Open Access Journals (Sweden)

    Duco Endeman

    Full Text Available Zebrafish is becoming an increasingly popular model in the field of visual neuroscience. Although the absorption spectra of its cone photopigments have been described, the cone action spectra were still unknown. In this study we report the action spectra of the four types of zebrafish cone photoreceptors, determined by measuring voltage responses upon light stimulation using whole cell patch clamp recordings. A generic template of photopigment absorption spectra was fit to the resulting action spectra in order to establish the maximum absorption wavelength, the A2-based photopigment contribution and the size of the β-wave of each cone-type. Although in general there is close correspondence between zebrafish cone action- and absorbance spectra, our data suggest that in the case of MWS- and LWS-cones there is appreciable contribution of A2-based photopigments and that the β-wave for these cones is smaller than expected based on the absorption spectra.

  5. Desordens do espectro alcoólico fetal e habilidades de comunicação: relato de caso familiar Fetal alcohol spectrum disorders and communication abilities: family case report

    Directory of Open Access Journals (Sweden)

    Dionísia Aparecida Cusin Lamônica

    2010-01-01

    Full Text Available Este estudo teve como objetivo caracterizar o perfil de habilidades comunicativas de cinco irmãos com Desordens do Espectro Alcoólico Fetal. O diagnóstico de Desordens do Espectro Alcoólico Fetal foi realizado a partir do histórico gestacional positivo para álcool e identificação de sinais clínicos. A avaliação fonoaudiológica constou da Observação do Comportamento Comunicativo, Escala de Desenvolvimento Comportamental de Gesell e Amatruda, Teste de Vocabulário por Imagens Peabody e avaliação audiológica. Todos os participantes apresentaram alterações nos comportamentos motor grosso, motor delicado, adaptativo, pessoal-social e de linguagem em graus variados. As habilidades comunicativas estavam comprometidas para todos os participantes e S4 apresentava comportamentos autísticos. As Desordens do Espectro Alcoólico Fetal foram confirmadas em S1, S2 e S5 e o diagnóstico de Síndrome Alcoólica Fetal foi confirmado para S3 e S4. Os resultados apresentaram variabilidade no desenvolvimento das habilidades de desenvolvimento dos irmãos com as Desordens do Espectro Alcoólico Fetal. A variabilidade dos achados, principalmente nas habilidades comunicativas e comportamentais, sugere a necessidade de acompanhar crianças com histórico de uso de álcool pela mãe, visto o impacto destas desordens no desenvolvimento global destes indivíduos, com impacto nas atividades de vida diária e escolaridade.The present study had the aim to characterize the communicative abilities profile of five siblings with Fetal Alcohol Spectrum Disorders. This diagnosis was carried out based on the positive report of prenatal alcohol exposure and identification of clinical signs. The Speech-Language Pathology evaluation consisted of the Communicative Behavior Observation, the Behavioral Development Scale of Gesell and Amatruda, the Peabody Picture Vocabulary Test, and hearing evaluation. Participants presented various degrees of alterations in gross

  6. INTERVENÇÃO MUSICAL COMO ESTRATÉGIA DE CUIDADO DE ENFERMAGEM A CRIANÇAS COM TRANSTORNO DO ESPECTRO DO AUTISMO EM UM CENTRO DE ATENÇÃO PSICOSSOCIAL

    OpenAIRE

    Franzoi,Mariana André Honorato; Santos,José Luís Guedes do; Backes,Vânia Marli Schubert; Ramos,Flávia Regina Souza

    2016-01-01

    A música tem sido utilizada cada vez mais no cuidado a crianças com transtorno do espectro do autismo. Este trabalho teve como objetivo relatar a experiência da aplicação da música como tecnologia de cuidado a estas crianças em um Centro de Atenção Psicossocial Infantojuvenil. Trata-se de um projeto de intervenção baseado na ideia de ação-reflexão-ação por meio das etapas de diagnóstico da realidade, teorização e aplicação na realidade. A intervenção musical favoreceu e orientou novas experiê...

  7. Graviton spectra in string cosmology

    Energy Technology Data Exchange (ETDEWEB)

    Galluccio, Massimo [Osservatorio Astronomico di Roma (Roma-IT); Litterio, Marco [Istituto Astronomico dell' Universita (Roma-IT); Occhionero, Franco [Osservatorio Astronomico di Roma (Roma-IT)

    1996-08-01

    We propose to uncover the signature of a stringy era in the primordial Universe by searching for a prominent peak in the relic graviton spectrum. This feature, which in our specific model terminates an ω³ increase and initiates an ω⁻⁷ decrease, is induced during the so far overlooked bounce of the scale factor between the collapsing deflationary era (or pre-Big Bang) and the expanding inflationary era (or post-Big Bang). We evaluate both analytically and numerically the frequency and the intensity of the peak and we show that they may likely fall in the realm of the new generation of interferometric detectors. The existence of a peak is at variance with ordinarily monotonic (either increasing or decreasing) graviton spectra of canonical cosmologies; its detection would therefore offer strong support to string cosmology.

  8. Graviton Spectra in String Cosmology

    CERN Document Server

    Galluccio, M; Occhionero, F; Galluccio, Massimo; Litterio, Marco; Occhionero, Franco

    1997-01-01

    We propose to uncover the signature of a stringy era in the primordial Universe by searching for a prominent peak in the relic graviton spectrum. This feature, which in our specific model terminates an $\\omega^3$ increase and initiates an $\\omega^{-7}$ decrease, is induced during the so far overlooked bounce of the scale factor between the collapsing deflationary era (or pre-Big Bang) and the expanding inflationary era (or post-Big Bang). We evaluate both analytically and numerically the frequency and the intensity of the peak and we show that they may likely fall in the realm of the new generation of interferometric detectors. The existence of a peak is at variance with ordinarily monotonic (either increasing or decreasing) graviton spectra of canonical cosmologies; its detection would therefore offer strong support to string cosmology.

  9. [Vibrational spectra of Corallium elatius].

    Science.gov (United States)

    Fan, Lu-wei; Zhang, Yan; Hu, Yang

    2013-09-01

    Corallium elatius, which has unique color distribution characteristic, is the most important species of Taiwan precious corals. EPMA, XRD, FTIR and Laser Raman detective methods were used to study the chemical, mineral composition and spectra characteristics of Corallium elatius. The result of EPMA, XRD and FTIR shows the high-Mg calcite mineral componentand the stable minor chemical constituents of the samples. Meanwhile, the cell parameter indicates the lattice distortion and the preferred orientation of calcite grain caused by organic matter. The red part of the samples shows a different Raman spectrum from that of the white part, located at 1517/1128 cm(-1) and 1296/1016 cm(-1). Raman scattering measurement reveals the relationship between the organic matter and color.

  10. Efecto de la curvatura espacial del universo en el espectro angular de las anisotropías en la temperatura de la radiación cósmica de fondo

    Directory of Open Access Journals (Sweden)

    Gabriel A. Mariño

    2007-01-01

    Full Text Available El paradigma inflacionario resuelve los tres problemas clásicos de la cosmología estándar: el problema de planitud, el problema de hori- zonte y el problema de las reliquias no deseadas. En particular, el problema de planitud se resuelve al explicar cómo la contribución relativa de la cur- vatura espacial del Universo a2K 2 a la densidad total de energía decrece H exponencialmente durante la inflación. Además, el escenario inflacionario nos ofrece un mecanismo eficiente para generar pequeñas perturbaciones en la curvatura espacial que explicarían las anisotropías en la temperatura de la radiación cósmica de fondo (RCF observadas hoy en día. Los tradi- cionales modelos inflacionarios que desprecian la contribución relativa a2K 2 H reproducen las recientes observaciones del satélite WMAP sobre el espectro angular Cl de las anisotropías en la temperatura de la RCF, pero fallan en los multipolos más pequeños, en donde las observaciones presentan una inesperada caída. Este extraño comportamiento nos conduce a proponer un análisis del espectro angular Cl a grandes escalas (pequeños multipolos teniendo en cuenta la contribución relativa a2K 2 , y ofrecer un mejor ajuste H a los datos experimentales, evidenciando así la topología característica del Universo observado.

  11. Da cor à cor inexistente: uma reflexão sobre espectros eletrônicos e efeitos cromáticos

    Directory of Open Access Journals (Sweden)

    Toma Henrique E.

    2005-01-01

    Full Text Available Inexistent colors have been the inspiring theme of investigation by Israel Pedrosa, a Brazilian artist, who has devoted his life to creative painting, exploiting the chemical and physical effects associated with light, especially those generated in the light refraction domain. In this article, by focusing on the electronic spectra of phthalocyanines and gold nanoparticles, we discuss how such effects can influence the spectroscopic measurements, leading to inexistent bands and transitions.

  12. Prediction of stellar atmospheric parameters from spectra, spectral indices and spectral lines using machine learning

    Directory of Open Access Journals (Sweden)

    Olac Fuentes

    2001-01-01

    Full Text Available En este trabajo presentamos un estudio experimental sobre la aplicaci on de un algoritmo simple de aprendizaje autom atico a la predicci on de los par ametros atm osfericos estelares Teff ; log g y [Fe=H] usando como datos de entrada tres con- juntos diferentes de caracter sticas espectrales. Comparamos el funcionamiento del algoritmo de los 3 vecinos m as cercanos ponderado por distancia usando como en- trada los espectros, los ndices espectrales obtenidos de la misma regi on de longitud de onda y las l neas de absorci on obtenidas eliminando del espectro la contribuci on del cont nuo, que es calculada por medio de un algoritmo de envolvente convexo. Los resultados experimentales muestran que las predicciones obtenidas usando ndices espectrales y l neas espectrales tienen niveles de precisi on muy similares, y que ambas son superiores a las obtenidas usando espectros.

  13. Modeling the diverse fuv spectra of disk-dominated Cataclysmic variables

    Directory of Open Access Journals (Sweden)

    Knox S. Long

    2004-01-01

    Full Text Available Los espectros de FUSE y HST de novas enanas en explosiones y de variables semejantes a novas presentan un amplio rango de caracter sticas. En unos cuantos sistemas existen se~nales obvias de un viento r apido en la forma de los per les de OVI semejantes a P-Cygni y de otros iones en relativamente altos estados de ionizaci on. Pero estos casos son raros. Son m as comunes los sistemas con espectros FUV que presentan una compleja mezcla de l neas de alto y bajo estado de ionizaci on. Se describen intentos para reproducir los espectros utilizando el c odigo de Monte Carlo de transferencia radiativa, desarrollado para modelar vientos bic onicos en sistemas de disco.

  14. X-Rays spectrum and air kerma during a mammography study;Espectro de los rayos X y kerma en aire durante un estudio mamografico

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez G, J. [Instituto Nacional de Estadistica Geografia e Informatica, Direccion General de Innovacion y Tecnologia de Informacion, Av. Heroes de Nacozari Sur No. 2301, Fracc. Jardines del Parque, 20276 Aguascalientes (Mexico); Hernandez V, R.; Chacon R, A.; Vega C, H. R., E-mail: ramirezgonzalezjaime@yahoo.com.m [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Calle Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico)

    2009-10-15

    The X-rays spectrum produced in a mammography has been calculated by means of Monte Carlo methods. In this calculation series it is modeled the electrons source, the target and the filter. The spectra were calculated for an energy of the electrons of 28 keV and for targets of W, Mo and Rh. The calculations extended to analyze the effect that produces the filters inclusion in the spectra; the spectra of W-A1, Rh-Rh, Mo-Mo, Mo-Rh and Mo-Be were calculated this way. Using thermoluminescent dosemeters of ZrO{sub 2}+PTFE the air kerma was measured in five points located on a phantom made with acrylic and water when it is was exposed to a X-rays beam produced by electrons of 24 keV and 10 m A of current that it produces a mammography. The values of the air kerma on the entrance surface of the phantom were compared with the calculated values by means of Monte Carlo methods. The calculated spectra present a continuous component and another discreet and its form is similar to the reported spectra in the literature. The filters inclusion allows the elimination of the low energy photons that do not have utility in the obtaining of the mammography image and only they contribute to deposit a dose in the mamma. The values of the measured air kerma indicate that the five points receive the same air kerma approximately, what means that the beam is homogeneous, of the Monte Carlo calculations we find that the center receives a bigger dose which implies that the beam is not uniform, the explanation on this fact it is attributed to that a simple model was used in the calculations, nevertheless, the average of the air kerma measured on the entrance surface of the phantom was of 0.96 +- 0.03 m G, while the obtained by means of the calculations was of 0.96 +- 0.06 mGy, when comparing both significant differences do not exist. (Author)

  15. The Spitzer Atlas of Stellar Spectra

    CERN Document Server

    Ardila, David R; Makowiecki, Wojciech; Stauffer, John; Song, Inseok; Rho, Jeonghee; Fajardo-Acosta, Sergio; Hoard, D W; Wachter, Stefanie

    2010-01-01

    We present the Spitzer Atlas of Stellar Spectra (SASS), which includes 159 stellar spectra (5 to 32 mic; R~100) taken with the Infrared Spectrograph on the Spitzer Space Telescope. This Atlas gathers representative spectra of a broad section of the Hertzsprung-Russell diagram, intended to serve as a general stellar spectral reference in the mid-infrared. It includes stars from all luminosity classes, as well as Wolf-Rayet (WR) objects. Furthermore, it includes some objects of intrinsic interest, like blue stragglers and certain pulsating variables. All the spectra have been uniformly reduced, and all are available online. For dwarfs and giants, the spectra of early-type objects are relatively featureless, dominated by Hydrogen lines around A spectral types. Besides these, the most noticeable photospheric features correspond to water vapor and silicon monoxide in late-type objects and methane and ammonia features at the latest spectral types. Most supergiant spectra in the Atlas present evidence of circumstell...

  16. Reflectance spectra of subarctic lichens

    Science.gov (United States)

    Petzold, Donald E.; Goward, Samuel N.

    1988-01-01

    Lichens constitute a major portion of the ground cover of high latitude environments, but little has been reported concerning their in situ solar spectral reflectance properties. Knowledge of these properties is important for the interpretation of remotely sensed observations from high latitude regions, as well as in studies of high latitude ecology and energy balance climatology. The spectral reflectance of common boreal vascular plants is similar to that of vascular plants of the midlatitudes. The dominant lichens, in contrast, display variable reflectance patterns in visible wavelengths. The relative reflectance peak at 0.55 microns, common to green vegetation, is absent or indistinct in spectra of pervasive boreal forest and tundra lichens, despite the presence of chlorophyll in the inner algal cells. Lichens of the dominant genus, Cladina, display strong absorption of ultraviolet energy and short-wavelength blue light relative to their absorption in other visible wavelengths. Since the Cladinae dominate both the surface vegetation in open woodlands of the boreal forest and the low arctic tundra, their unusual spectral reflectance patterns will enable accurate monitoring of the boreal forest-tundra ecotone and detection of its vigor and movement in the future.

  17. Interpretation of Nitroindolinospirobenzothiopyran Vibrational Spectra

    Science.gov (United States)

    Gladkov, L. L.; Khamchukov, Yu. D.; Lyubimov, A. V.

    2016-05-01

    The structures of four possible stereoisomers of the closed form of photochromic nitroindolinospirobenzothiopyran (NISTP) {1',3'-dihydro-1',3',3'-trimethyl-6-nitrospiro[2H-1-benzothiopyran-2,2'-(2H)-indoline]} were determined by the DFT method. The geometry of the most stable isomer was defined. Nitro-substitution changes mainly the lengths of bonds formed by S and N with spiro-atom Cs. According to the calculations, the CsS bond changes most and lengthens by 0.019 Å. It is shown that the S atom has large displacement amplitudes in normal modes assigned to Raman lines at 230, 285, 360, and 575 cm-1 and weak IR bands at 467 and 577 cm-1. Oscillations involving the nitro group are very active in Raman and IR spectra. Their frequencies are slightly lower than similar frequencies of nitrobenzene and nitroindolinospirobenzopyran, indicating a higher degree of vibrational coupling of the NO2 group with the NISTP molecular skeleton.

  18. Functional Regression for Quasar Spectra

    CERN Document Server

    Ciollaro, Mattia; Freeman, Peter; Genovese, Christopher; Lei, Jing; O'Connell, Ross; Wasserman, Larry

    2014-01-01

    The Lyman-alpha forest is a portion of the observed light spectrum of distant galactic nuclei which allows us to probe remote regions of the Universe that are otherwise inaccessible. The observed Lyman-alpha forest of a quasar light spectrum can be modeled as a noisy realization of a smooth curve that is affected by a `damping effect' which occurs whenever the light emitted by the quasar travels through regions of the Universe with higher matter concentration. To decode the information conveyed by the Lyman-alpha forest about the matter distribution, we must be able to separate the smooth `continuum' from the noise and the contribution of the damping effect in the quasar light spectra. To predict the continuum in the Lyman-alpha forest, we use a nonparametric functional regression model in which both the response and the predictor variable (the smooth part of the damping-free portion of the spectrum) are function-valued random variables. We demonstrate that the proposed method accurately predicts the unobserv...

  19. On non-forking spectra

    CERN Document Server

    Chernikov, Artem; Shelah, Saharon

    2012-01-01

    Non-forking is one of the most important notions in modern model theory capturing the idea of a generic extension of a type (which is a far-reaching generalization of the concept of a generic point of a variety). To a countable first-order theory we associate its non-forking spectrum - a function of two cardinals kappa and lambda giving the supremum of the possible number of types over a model of size lambda that do not fork over a sub-model of size kappa. This is a natural generalization of the stability function of a theory. We make progress towards classifying the non-forking spectra. On the one hand, we show that the possible values a non-forking spectrum may take are quite limited. On the other hand, we develop a general technique for constructing theories with a prescribed non-forking spectrum, thus giving a number of examples. In particular, we answer negatively a question of Adler whether NIP is equivalent to bounded non-forking. In addition, we answer a question of Keisler regarding the number of cut...

  20. Electronic Spectra of Chevreul's Salts

    Directory of Open Access Journals (Sweden)

    Silva Luciana A. da

    2002-01-01

    Full Text Available The isomorphic series of double sulfites with empirical formula Cu2SO3.MSO3.2H 2O (where M is Cu, Fe, Mn, or Cd have been prepared from the Cu(II replacement by transition metal ions such as Mn(II, Fe(II and Cd(II ions in Chevreul's salt, Cu2SO3.CuSO3.2H 2O. As a consequence, the isomorphic species present distinct colors. Molecular modeling calculations were carried out for the dimeric [CuI2(SO3 2(SO32]6- center. The electronic spectra of the Chevreul's salt consist of a charge-transfer band around 425 nm associated with the [CuI2(SO3 2(SO32]6- chromophore and two ligand field transitions at 785 and 1000 nm involving the Jahn-Teller splitting of the Cu(II levels. An additional intervalence-transfer band, responsible for its characteristic red color, can be found at 500 nm. The replacement of the Cu(II ions for Fe(II, Mn(II and Cd(II does not eliminate the absorption band at 425 nm, supporting its assignment as a charge-transfer transition centered on the Cu(I sites; while the original band at 500 nm disappears, in agreement with its intervalence transfer nature.

  1. Structure of high-resolution NMR spectra

    CERN Document Server

    Corio, PL

    2012-01-01

    Structure of High-Resolution NMR Spectra provides the principles, theories, and mathematical and physical concepts of high-resolution nuclear magnetic resonance spectra.The book presents the elementary theory of magnetic resonance; the quantum mechanical theory of angular momentum; the general theory of steady state spectra; and multiple quantum transitions, double resonance and spin echo experiments.Physicists, chemists, and researchers will find the book a valuable reference text.

  2. A study of ice response spectra

    Institute of Scientific and Technical Information of China (English)

    LIU Chunguang; JIA Lingling

    2009-01-01

    Some problems concerning the ice forces and ice response spectra are studied from both theoretical and practical points of view. On the basis of structural analysis,the analysis method of ice response spectra is proposed, since it plays an important role in the prediction of maximum structural response in cold regions. And it is illustrated that it is easy to study the structural response to ice using the ice response spectra.

  3. Circumstellar Molecular Spectra towards Evolved Stars

    CERN Document Server

    Bakker, E J

    1997-01-01

    In this paper we discuss the relevance of, and possible scientific gains which can be acquired from studying circumstellar molecular spectra toward evolved stars. Where can we expect circumstellar molecular spectra, why would we want to study these spectra, which molecules might be present, and what can we learn from these studies? We present an overview of reported detections, and discuss some of the results.

  4. Calculation of reactor antineutrino spectra in TEXONO

    CERN Document Server

    Chen Dong Liang; Mao Ze Pu; Wong, T H

    2002-01-01

    In the low energy reactor antineutrino physics experiments, either for the researches of antineutrino oscillation and antineutrino reactions, or for the measurement of abnormal magnetic moment of antineutrino, the flux and the spectra of reactor antineutrino must be described accurately. The method of calculation of reactor antineutrino spectra was discussed in detail. Furthermore, based on the actual circumstances of NP2 reactors and the arrangement of detectors, the flux and the spectra of reactor antineutrino in TEXONO were worked out

  5. Spectra of Velocity components over Complex Terrain

    DEFF Research Database (Denmark)

    Panofsky, H. A.; Larko, D.; Lipschut, R.

    1982-01-01

    Spectra have been measured over a variety of types of complex terrain: on tops of hills and escarpments, over land downstream of a water surface, and over rolling terrain. Differences between spectra over many types of complex terrain, and over uniform terrain, can be explained by these hypotheses...... is horizontal, and decrease when the flow is uphill, for the longitudinal velocity component only. Since vertical-velocity spectra contain relatively less low wavenumber energy than horizontal-velocity spectra, energetic vertical-velocity fluctuations tend to be in equilibrium with local terrain....

  6. Optical absorption spectra of Ag-11 isomers

    DEFF Research Database (Denmark)

    Martinez, Jose Ignacio; Fernandez, E. M.

    2009-01-01

    The optical absorption spectra of the three most; stable structural isomers of the Ag-11 cluster were calculated using the time-dependent, density functional theory within the Casida formalism. The slightly different, spectra, of the isomers may permit the identification of the ground-stale confi......The optical absorption spectra of the three most; stable structural isomers of the Ag-11 cluster were calculated using the time-dependent, density functional theory within the Casida formalism. The slightly different, spectra, of the isomers may permit the identification of the ground...

  7. Caracterización espectro-fotométrica del entorno de una muestra de blazares en el óptico

    Science.gov (United States)

    Torres-Zafra, J.; Cellone, S.; Andruchow, I.

    2016-08-01

    BLLac objects are a class of active galactic nuclei characterized by presenting optical spectra without evident features; for this reason it is very difficult to determine their redshifts (). In this paper we perform a spectrophotometric study of the environment of three BLLac type objects: 3C 66A, PG1,553113 and PKS0332403, using data obtained with the Multi-Object Spectrograph and Camera, instrument at the 8m Gemini North and Gemini South telescopes. The analysis of these data allows us to detect galaxy cluster candidates with redshifts of , and respectively. Therefore, we discuss the probability of membership of the sources studied here to these structures.

  8. Calculation of the detection efficiency in liquid scintillators. I.- Single negatrons emitters; Calculo de la eficiencia de deteccion en liquidos centelleadores. I. Nucleidos que se desintegran por emision simple de negatrones

    Energy Technology Data Exchange (ETDEWEB)

    Grau Malonda, A.; Garcia-torano, E.

    1981-07-01

    Counting efficiency for 62 single beta emitters has been computed from the beta energy distribution, the figure of merit and the ionization quenching. Efficiency v.s. figure of merit is plotted and tabulated. (Author) 16 refs.

  9. Thermoluminescence spectra measured with a Michelson interferometer

    Energy Technology Data Exchange (ETDEWEB)

    Haschberger, P. (Technische Univ. Muenchen (Germany). Lehrstuhl fuer Elektrische Messtechnik)

    1991-01-01

    A Michelson interferometer was redesigned to prove its capabilities in the measurement of short-lived, low-intensity thermoluminescence spectra. Interferograms are collected during heating up the thermoluminescent probe in a heater plate. A personal computer controls the data acquisition and processes the Fourier transform. As the results show, even a comparatively simple and limited setup leads to relevant and reproducible spectra. (author).

  10. Aircraft Measurements of Atmospheric Kinetic Energy Spectra

    DEFF Research Database (Denmark)

    Lundtang Petersen, Erik; Lilly, D. K.

    1983-01-01

    Wind velocity data obtained from a jet airliner are used to construct kinetic energy spectra over the range of wavelengths from 2.5 to 2500 km. The spectra exhibit an approximate -5/3 slope for wavelengths of less than about 150 km, steepening to about -2.2 at larger scales. These results support...

  11. Moessbauer Spectra of Clays and Ceramics

    Energy Technology Data Exchange (ETDEWEB)

    Wagner, F. E.; Wagner, U. [Technische Universitaet Muenchen (Germany)

    2004-06-15

    The physical, chemical and mineralogical aspects of the use of Moessbauer spectroscopy in studies of clay-based ceramics are described. Moessbauer spectra of pottery clays fired under oxidising, reducing and changing conditions are explained, and the possibilities of using Moessbauer spectra to derive information on the firing temperatures and the kiln atmosphere during firing in antiquity are discussed and illustrated by examples.

  12. Aircraft Measurements of Atmospheric Kinetic Energy Spectra

    DEFF Research Database (Denmark)

    Lundtang Petersen, Erik; Lilly, D. K.

    1983-01-01

    Wind velocity data obtained from a jet airliner are used to construct kinetic energy spectra over the range of wavelengths from 2.5 to 2500 km. The spectra exhibit an approximate -5/3 slope for wavelengths of less than about 150 km, steepening to about -2.2 at larger scales. These results support...

  13. Tunneling spectra of graphene on copper unraveled

    DEFF Research Database (Denmark)

    Zhang, Xin; Stradi, Daniele; Liu, Lei

    2016-01-01

    mechanisms, etc. The interpretation of the spectra can be complicated, however. Specifically for graphene grown on copper, there have been conflicting reports of tunneling spectra. A clear understanding of the mechanisms behind the variability is desired. In this work, we have revealed that the root cause...

  14. POLLUX : a database of synthetic stellar spectra

    CERN Document Server

    Palacios, A; Josselin, E; Martins, F; Plez, B; Belmas, M; Lebre, A

    2010-01-01

    Synthetic spectra are needed to determine fundamental stellar and wind parameters of all types of stars. They are also used for the construction of theoretical spectral libraries helpful for stellar population synthesis. Therefore, a database of theoretical spectra is required to allow rapid and quantitative comparisons to spectroscopic data. We provide such a database offering an unprecedented coverage of the entire Hertzsprung-Russell diagram. We present the POLLUX database of synthetic stellar spectra. For objects with Teff 25 000 K). Their spectra are computed with CMF_FLUX. Both high resolution (R>150 000) optical spectra in the range 3 000 to 12 000 A and spectral energy distributions extending from the UV to near--IR ranges are presented. These spectra cover the HR diagram at solar metallicity. We propose a wide variety of synthetic spectra for various types of stars in a format that is compliant with the Virtual Observatory standards. A user--friendly web interface allows an easy selection of spectra...

  15. A comparison in the reconstruction of neutron spectrums using classical iterative techniques; Una comparacion en la reconstruccion de espectros de neutrones utilizando tecnicas iterativas clasicas

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz R, J. M. [Departamento de Electrotecnia y Electronica, Escuela Politecnica Superior, Av. Menendez Pidal s/n, 14004 Cordoba (Spain); Martinez B, M. R.; Vega C, H. R. [Unidad Academica de Estudios Nucleares, Universidad Autonoma de Zacatecas, Cipres 10, Fracc. La Penuela, 98068 Zacatecas (Mexico); Gallego, E. [Departamento de Ingenieria Nuclear, Universidad Politecnica de Madrid, Jose Gutierrez Abascal 2, 28006 Madrid (Spain)], e-mail: morvymm@yahoo.com.mx

    2009-10-15

    One of the key drawbacks to the use of BUNKI code is that the process begins the reconstruction of the spectrum based on a priori knowledge as close as possible to the solution that is sought. The user has to specify the initial spectrum or do it through a subroutine called MAXIET to calculate a Maxwellian and a 1/E spectrum as initial spectrum. Because the application of iterative procedures by to resolve the reconstruction of neutron spectrum needs an initial spectrum, it is necessary to have new proposals for the election of the same. Based on the experience gained with a widely used method of reconstruction, called BUNKI, has developed a new computational tools for neutron spectrometry and dosimetry, which was first introduced, which operates by means of an iterative algorithm for the reconstruction of neutron spectra. The main feature of this tool is that unlike the existing iterative codes, the choice of the initial spectrum is performed automatically by the program, through a neutron spectra catalog. To develop the code, the algorithm was selected as the routine iterative SPUNIT be used in computing tool and response matrix UTA4 for 31 energy groups. (author)

  16. General Notes on Processes and Their Spectra

    Directory of Open Access Journals (Sweden)

    Gustav Cepciansky

    2012-01-01

    Full Text Available The frequency spectrum performs one of the main characteristics of a process. The aim of the paper is to show the coherence between the process and its own spectrum and how the behaviour and properties of a process itself can be deduced from its spectrum. Processes are categorized and general principles of their spectra calculation and recognition are given. The main stress is put on power spectra of electric and optic signals, as they also perform a kind of processes. These spectra can be directly measured, observed and examined by means of spectral analyzers and they are very important characteristics which can not be omitted at transmission techniques in telecommunication technologies. Further, the paper also deals with non electric processes, mainly with processes and spectra at mass servicing and how these spectra can be utilised in praxis.

  17. Questionário sobre dificuldades comunicativas percebidas por pais de crianças do espectro do autismo Questionnaire about communicative difficulties perceived by parents of children of the autism spectrum

    Directory of Open Access Journals (Sweden)

    Juliana Izidro Balestro

    2012-01-01

    Full Text Available OBJETIVO: Elaborar um questionário para o levantamento de dificuldades comunicativas percebidas por pais e/ou cuidadores de crianças do espectro do autismo em relação a seus filhos. MÉTODOS: Os aspectos específicos abordados no questionário foram identificados a partir da literatura e da experiência clínica das autoras em dois serviços especializados. As questões foram organizadas segundo diferentes domínios e as respostas registradas numa escala tipo Likert. Foi realizado um estudo piloto com 40 pais, 20 pais de crianças do espectro do autismo e 20 pais de crianças sem queixas de linguagem, como forma de verificar a aplicabilidade do questionário construído e sua utilidade na identificação de dificuldades específicas da população alvo. Foi calculado o nível de concordância das questões e os resultados dos grupos foram comparados entre si (teste t Student. RESULTADOS: O questionário foi desenvolvido de maneira a abranger aspectos fundamentais para o relacionamento interpessoal, tanto no âmbito comunicativo quanto social. Foi dividido em 24 questões fechadas que abrangem quatro domínios; e uma questão aberta, com espaço para que os pais relatassem algo relevante e que não tenha sido perguntado. O estudo possibilitou testar a compreensão do instrumento e a análise estatística indicou que 19 questões apresentaram diferença. CONCLUSÃO: O questionário elaborado identificou diferenças na percepção e atitude de pais de crianças do espectro do autismo e de crianças sem queixa de linguagem, em relação às dificuldades de comunicação com seus filhos. Dessa forma, mostrou-se útil para o levantamento dessas dificuldades em um grupo maior de indivíduos.PURPOSE: To develop a questionnaire to the assessment of communicative difficulties perceived by parents and/or caregivers of children on the autism spectrum in relation to their children. METHODS: The specific aspects addressed by the questionnaire derived from

  18. Adjuvantes nas propriedades físicas da calda, espectro e eficiência de eletrificação das gotas utilizando a pulverização eletrostática

    Directory of Open Access Journals (Sweden)

    Robson Shigueaki Sasaki

    2015-02-01

    Full Text Available Os adjuvantes têm sido empregados na pulverização de agrotóxicos, entretanto, ainda se carece de informações sobre o efeito destes produtos, principalmente quando se emprega o sistema eletrostático. O presente trabalho foi conduzido com o objetivo de avaliar dez soluções de pulverização (nove adjuvantes e uma testemunha, quanto às propriedades físicas (viscosidade e condutividade elétrica e quanto ao espectro e a eficiência de eletrificação da gota na pulverização eletrostática. Utilizou-se um pulverizador eletrostático da marca Electrostatic Spraying Systems e modelo MB 4.0. Para avaliar a viscosidade, a metodologia de Ostwald foi utilizada, enquanto a condutividade elétrica foi determinada com uso de um condutivímetro, marca Marte e modelo MB-11. Na análise da carga elétrica presente na gota, utilizou-se a metodologia da gaiola de Faraday e a avaliação do espectro foi realizada por meio de um analisador de partículas a laser (Spraytech Malvern(r. Os adjuvantes testados alteraram a viscosidade da calda, variando entre 0,94 e 1,03mPa s. Para a condutividade elétrica, observou-se que a água apresentou 67,7µS cm-1 e, com o uso de adjuvantes, o valor obtido foi de até 607,5µS cm-1. Quanto à eletrificação das gotas, houve aumento de até 50,14% na relação Q/M com o uso de adjuvantes, demonstrando que auxiliam na pulverização eletrostática. De forma geral, os adjuvantes reduziram o diâmetro das gotas pulverizadas

  19. Espectro polínico de amostras de mel de Melipona mandacaia Smith, 1863 (Hymenoptera: Apidae = Pollen spectrum from honey samples of Melipona mandacaia Smith, 1863 stingless bee (Hymenoptera: Apidae

    Directory of Open Access Journals (Sweden)

    Rogério Marcos de Oliveira Alves

    2006-01-01

    Full Text Available O espectro polínico de amostras de mel da abelha Melipona mandacaia foi analisado com objetivo de elucidar os recursos alimentares utilizados por essa espécie. A identificação das plantas visitadas foi realizada com base na análise dos tipos polínicos encontrados nas amostras de mel coletadas em 11 colônias localizadas no município de São Gabriel, em área de caatinga do Estado da Bahia, Brasil (11º14’S e 41º52’W. As análises quantitativas e qualitativas foram realizadas com o objetivo de determinar as porcentagens e classes de freqüência dos tipos polínicos presentes nas amostras de mel. Foram encontrados 26 tipos polínicos, sendo o tipo Piptadenia rigida (Mimosaceae considerado dominante. Ricinus communis (Euphorbiaceae, Mimosa verrucata (Mimosaceae e M. arenosa (Mimosaceae foram considerados pólen isolado importante. As famílias mais representativas no espectro polínico das amostras de mel foram Mimosaceae, Euphorbiaceae, Asteraceae e Anacardiaceae.The pollen spectrum from honey samples of Melipona mandacaia stingless bee was analyzed aiming at elucidating the alimentaryresources used by that species. The identification of the visited plants was based on the analysis of pollen from honey samples collected in 11 hives located in São Gabriel county, in the semiarid area of Bahia State, Brazil (11º14’S and 41º52’W. The quantitative and qualitative analyses of honey samples were conducted in order to determine the pollen types percentages and frequency classes. Twenty-six pollen types were found, being the Piptadenia rigida type (Mimosaceae considered dominant. Ricinus communis (Euphorbiaceae, Mimosa verrucata (Mimosaceae and M. arenosa (Mimosaceae were considered important isolated pollen. The most representative families found in the pollen spectrum of the honey samples were Mimosaceae, Euphorbiaceae, Asteraceae and Anacardiaceae.

  20. Estudo do espectro sonoro nos limiares de altas frequências em trabalhadores expostos ao ruído Study of the noise spectrum on high frequency thresholds in workers exposed to noise

    Directory of Open Access Journals (Sweden)

    Aurea Oliveira Canha Ottoni

    2012-08-01

    Full Text Available O grau de nocividade do ruído pode ser quantificado e qualificado com base em algumas características do som como sua intensidade, o tipo de espectro, duração e a distribuição da exposição ao ruído durante a jornada de trabalho. OBJETIVO: Avaliar o espectro de ruído e a configuração audiométrica em trabalhadores. MATERIAIS E MÉTODOS: Estudo de coorte contemporânea com corte transversal, realizado no Distrito Federal. Realizou-se avaliação ambiental (análise espectral do ruído em empresas de diferentes ramos de atividade econômica e avaliação audiológica em 347 trabalhadores. RESULTADOS: A análise espectral revelou picos em diferentes frequências em cada ramo de atividade (8 kHz-metalúrgico, 4 kHz-marmoraria e 2 kHz-madeireira. Verificou-se que as frequências de 14 kHz e 16 kHz apresentaram diferenças significativas entre os ramos de atividade, com maior prevalência no metalúrgico. CONCLUSÃO: A utilização de medidor de nível de pressão sonora, acoplado a analisador de frequência e a avaliação audiométrica de altas frequências possibilitam a detecção precoce de danos auditivos que, por sua vez, viabiliza melhor direcionamento das ações preventivas.Noise level can be quantified and qualified based on sound characteristics such as intensity, type of spectrum, duration and distribution of the noise exposure during one's working hours. OBJECTIVE: To assess noise spectrum and the audiometric configuration of workers. MATERIALS AND METHODS: Contemporary cross-sectional cohort carried out in the Federal District - Brazil. We did an environmental analysis (spectral analysis of the noise in companies from different industries, with audiological assessment of 347 workers. RESULTS: The spectral analysis revealed peaks at different frequencies for each industry investigated (8 kHz-metallurgical, 4 kHz-stone Works and 2 kHz-wood works. We noticed that the frequencies of 14 kHz and 16 kHz had significant differences

  1. Avaliação do espectro semântico de instrumentos para organização da informaçãoEvaluation of the semantic spectrum for information organization instruments

    Directory of Open Access Journals (Sweden)

    Renato Rocha Souza

    2011-05-01

    Full Text Available O termo "semântica" tem sido amplamente utilizado nos últimos anos em diversas áreas de pesquisa e, em particular, em áreas relacionadas à tecnologia da informação. Um dos motivadores de tal apropriação é a visão da Web Semântica, originada na expansão da web e nas limitações dos instrumentos de busca baseados em sintaxe. Cabe questionar, entretanto, qual é esta "semântica" de que trata a Web Semântica, uma vez que o estudo do assunto é complexo e controverso. O presente artigo se insere nesse contexto, analisando o que é semântica, discutindo-a no âmbito da tecnologia da informação e propondo alternativas interpretativas. Avalia-se criticamente um espectro, o qual propõe a ordenação de instrumentos (modelos, linguagens, estruturas taxonômicas, etc. de acordo com uma escala semântica. Espera-se tornar claro o uso do termo em contextos diversos, bem como propor um novo espectro a partir das considerações do presente artigo.The term “semantics” has been used over the past years in several areas of research and, more specifically, in those related to information technology. One reason for that appropriation is the Semantic Web vision, which originated from the expansion of the web and the inherent limitations of the syntax-based search engines. However, it is reasonable to demand an explanation about which is the semantics addressed in the Semantic Web since the study of the subject is complex and controversial. The present article aims to make a contribution towards this sense, analyzing what semantic is, discussing it within the scope of information technology and proposing explanatory alternatives. We intend to critically evaluate a spectrum that suggests a classification of instruments (models, languages, taxonomic structures, etc in a semantic-based scale of graduated rates. We hope to provide a better understanding about the use of the term in different contexts, as well as offer a new spectrum from the

  2. Functional Communication Profile - Revised: uma proposta de caracterização objetiva de crianças e adolescentes do espectro do autismo Functional Communication Profile - Revised: objective description of children and adolescents of the autism spectrum

    Directory of Open Access Journals (Sweden)

    Thaís Helena Ferreira Santos

    2012-12-01

    Full Text Available OBJETIVO: Caracterizar objetivamente as alterações de crianças e adolescentes incluídos no espectro do autismo de acordo com o grau de severidade definido a partir das respostas ao Functional Communication Profile - Revised (FCP-R. MÉTODOS: Foram selecionadas 50 crianças (idade média 7 anos e 11 meses com diagnósticos no espectro do autismo que foram avaliados segundo os critérios do FCP-R. As respostas obtidas foram pontuadas e classificadas de acordo com a severidade e realizada análise estatística pertinente. RESULTADOS: A caracterização dessa população evidenciou dados concordantes com a literatura, mostrando prejuízos nas áreas de linguagem (expressiva e receptiva, comportamento e pragmática, principalmente. Os indivíduos que não possuem habilidades verbais evidenciaram, ainda, alterações referentes aos domínios fala e fluência. CONCLUSÃO: O FCP-R foi sensível para caracterizar a população estudada, mostrando-se ainda mais eficaz para a avaliação individualizada.PURPOSE: To objectively characterize the alterations of autistic children and adolescents as to their severity degree, according to the answers to the Functional Communication Profile - Revised (FCP-R. METHODS: Subjects were 50 children (mean age 7 years 11 months with diagnosis within the autism spectrum that were assessed according to the FCP-R criteria. Answers were scored and classified according to severity, and the results were statistically analyzed. RESULTS: This group characterization evidenced results that agree with the literature, showing disorders mainly in the areas of language (expressive and receptive, behavior and pragmatics. Individuals without verbal communication also showed speech and fluency disorders. CONCLUSION: The FCP-R was sensitive to characterize the studied population, and even more efficient for individual assessment.

  3. Autismo y epigenética: Un modelo de explicación para la comprensión de la génesis en los trastornos del espectro autista

    Directory of Open Access Journals (Sweden)

    Claudia Arberas

    2013-09-01

    Full Text Available Los trastornos del espectro autista (TEA se caracterizan por presentar compromiso en la integración social, el desarrollo del lenguaje e intereses restringidos. Se expresan durante la infancia y van variando su expresión clínica a lo largo de los años; estas variaciones pueden relacionarse a los abordajes terapéuticos, drogas utilizadas para modificar conductas y factores ambientales, entre otros. Hasta el momento, las diversas alteraciones genéticas identificadas no son suficientes para explicar la génesis de todos estos procesos, incluso muchas de las mutaciones encontradas también están presentes en personas no afectadas. A través de la comprensión de las bases biológicas y fisiopatológicas de entidades fuertemente asociadas a los TEA como los síndromes de Rett, Frágil X, Angelman y Alcohol fetal, entre otros, es que se ha jerarquizado el rol de los cambios epigenéticos en los trastornos del neurodesarrollo. Los fenómenos epigenéticos son procesos biológicos normales, necesarios para la vida de la célula y del individuo, muy especialmente vinculados con el desarrollo embrionario. Los fenómenos que comprometen los distintos procesos epigenéticos (alteraciones que cambian el funcionamiento o expresión de un gen, sin haber modificado la estructura del ADN han demostrado también tener importancia en la génesis de los trastornos del neurodesarrollo. Las alteraciones del mecanismo epigenético pueden ser reversibles, lo que podría explicar la variación del fenotipo autista a lo largo del tiempo. En este trabajo analizaremos los mecanismos epigenéticos normales, los trastornos del espectro autista, su asociación con entidades específicas asociadas a mecanismos epigenéticos alterados y posibles abordajes terapéuticos relacionados a estas alteraciones.

  4. Caracterização do perfil comunicativo de crianças com distúrbios do espectro autístico com diferentes interlocutores Characterizing the communicative profile of children with autistic spectrum disturbances with different interlocutors

    Directory of Open Access Journals (Sweden)

    Aline Citino Armonia

    2011-10-01

    Full Text Available OBJETIVO: caracterizar e comparar o perfil comunicativo de crianças com distúrbios do espectro autístico com dois diferentes interlocutores. MÉTODO: participaram da pesquisa nove sujeitos, sendo quatro crianças do gênero masculino, com faixa etária variando entre cinco anos e oito meses e onze anos, com distúrbios do espectro autístico e cinco terapeutas de linguagem. Foram realizadas análises do perfil comunicativo dessas crianças com os dois diferentes interlocutores (terapeuta de linguagem da própria criança e terapeuta desconhecida. Para análise dos dados foi empregado o Protocolo de Pragmática e tratamento estatístico dos resultados (p PURPOSE: characterize and compare the communicative profile of children with disturbances of autistic specter with two different speakers. METHOD: nine subjects took part in the research, among them four children of the masculine gender, between five years old and eight months and eleven years old, with disturbances of the autistic specter and five speech and language therapists. We carried out an analysis of the communicative profile respective to these children with two different speakers (proper child's speech and language and unknown therapist. For the analysis of the information we used the Protocol of Pragmatica and statistical treatment of the results (p < 0.05; Tests of Wilcoxon's Signalized Posts. RESULTS: we raised the number of the communicative acts, the mean through those acts was expressed (vocal, verbal and signal and also the communicative functions. As a rule, the number of the communicative acts expressed by subjects as with proper child's therapists (5,10 acts/min as with unknown therapist (4,93 acts/min was not statistically significant. It was observed in the situation of interaction with proper therapist that the mean value for the percentage of occurrence of verbal communicative mean (31.50% and the average of more interactive functions (33.25% are larger than unknown

  5. Spectra of conformal sigma models

    Energy Technology Data Exchange (ETDEWEB)

    Tlapak, Vaclav

    2015-04-15

    In this thesis the spectra of conformal sigma models defined on (generalized) symmetric spaces are analysed. The spaces where sigma models are conformal without the addition of a Wess-Zumino term are supermanifolds, in other words spaces that include fermionic directions. After a brief review of the general construction of vertex operators and the background field expansion, we compute the diagonal terms of the one-loop anomalous dimensions of sigma models on semi-symmetric spaces. We find that the results are formally identical to the symmetric case. However, unlike for sigma models on symmetric spaces, off diagonal terms that lead to operator mixing are also present. These are not computed here. We then present a detailed analysis of the one-loop spectrum of the supersphere S{sup 3} {sup vertical} {sup stroke} {sup 2} sigma model as one of the simplest examples. The analysis illustrates the power and simplicity of the construction. We use this data to revisit a duality with the OSP(4 vertical stroke 2) Gross-Neveu model that was proposed by Candu and Saleur. With the help of a recent all-loop result for the anomalous dimension of (1)/(2)BPS operators of Gross-Neveu models, we are able to recover the entire zero-mode spectrum of the supersphere model. We also argue that the sigma model constraints and its equations of motion are implemented correctly in the Gross-Neveu model, including the one-loop data. The duality is further supported by a new all-loop result for the anomalous dimension of the ground states of the sigma model. However, higher-gradient operators cannot be completely recovered. It is possible that this discrepancy is related to a known instability of the sigma model. The instability of sigma models is due to symmetry preserving high-gradient operators that become relevant at arbitrarily small values of the coupling. This feature has been observed long ago in one-loop calculations of the O(N)-vector model and soon been realized to be a generic

  6. Decomposition of spectra using maximum autocorrelation factors

    DEFF Research Database (Denmark)

    Larsen, Rasmus

    2001-01-01

    into classification or regression type analyses. A featured method for low dimensional representation of multivariate datasets is Hotellings principal components transform. We will extend the use of principal components analysis incorporating new information into the algorithm. This new information consists......This paper addresses the problem of generating a low dimensional representation of the variation present in a set of spectra, e.g. reflection spectra recorded from a series of objects. The resulting low dimensional description may subseque ntly be input through variable selection schemes...... Fourier decomposition these new variables are located in frequency as well as well wavelength. The proposed algorithm is tested on 100 samples of NIR spectra of wheat....

  7. Rotational structure in molecular infrared spectra

    CERN Document Server

    di Lauro, Carlo

    2013-01-01

    Recent advances in infrared molecular spectroscopy have resulted in sophisticated theoretical and laboratory methods that are difficult to grasp without a solid understanding of the basic principles and underlying theory of vibration-rotation absorption spectroscopy. Rotational Structure in Molecular Infrared Spectra fills the gap between these recent, complex topics and the most elementary methods in the field of rotational structure in the infrared spectra of gaseous molecules. There is an increasing need for people with the skills and knowledge to interpret vibration-rotation spectra in ma

  8. Multivariate analysis of endometrial tissue fluorescence spectra

    Science.gov (United States)

    Vaitkuviene, Aurelija; Auksorius, E.; Fuchs, D.; Gavriushin, V.

    2002-10-01

    Background and Objective: The detailed multivariate analysis of endometrial tissue fluorescence spectra was done. Spectra underlying features and classification algorithm were analyzed. An effort has been made to determine the importance of neopterin component in endometrial premalignization. Study Design/Materials and Methods: Biomedical tissue fluorescence was measured by excitation with the Nd YAG laser third harmonic. Multivariate analysis techniques were used to analyze fluorescence spectra. Biomedical optics group at Vilnius University analyzed the neopterin substance supplied by the Institute of Medical Chemistry and Biochemistry of Innsbruck University. Results: Seven statistically significant spectral compounds were found. The classification algorithm classifying samples to histopathological categories was developed and resulted in sensitivity of 80% and specificity 93% for malignant vs. hyperplastic and normal. Conclusions: Fluorescence spectra could be classified with high accuracy. Spectral variation underlying features can be extracted. Neopterin component might play an important role in endometrial hyperplasia development.

  9. Spectra: Time series power spectrum calculator

    Science.gov (United States)

    Gallardo, Tabaré

    2017-01-01

    Spectra calculates the power spectrum of a time series equally spaced or not based on the Spectral Correlation Coefficient (Ferraz-Mello 1981, Astron. Journal 86 (4), 619). It is very efficient for detection of low frequencies.

  10. The electronic spectra of protonated PANH molecules

    CERN Document Server

    Noble, J A; Jouvet, C

    2015-01-01

    Aims. This study was designed to examine the viability of protonated nitrogen-substituted polycyclic aromatic hydrocarbons (H+PANHs) as candidates for the carriers of the diffuse interstellar bands (DIBs). Methods. We obtained the electronic spectra of two protonated PANH cations, protonated acridine and phenanthridine, using parent ion photo-fragment spectroscopy and generated theoretical electronic spectra using ab initio calculations. Results. We show that the spectra of the two species studied here do not correspond to known DIBs. However, based on the general properties derived from the spectra of these small protonated nitrogen-substituted PAHs, we propose that larger H+PANH cations represent good candidates for DIB carriers due to the expected positions of their electronic transitions in the UV-visible and their narrow spectral bands.

  11. Power spectra of currents off Bombay

    Digital Repository Service at National Institute of Oceanography (India)

    Varkey, M.J.

    Current measurements were carried out using a recording current meter across the continental shelf off Bombay, Maharashtra, India at 4 stations from an anchored ship. Power spectra were computed for selected lengths of records. Spectral energy...

  12. Energetic electron spectra in Saturn's plasma sheet

    Science.gov (United States)

    Carbary, J. F.; Paranicas, C.; Mitchell, D. G.; Krimigis, S. M.; Krupp, N.

    2011-07-01

    The differential spectra of energetic electrons (27-400 keV) in Saturn's plasma sheet can be characterized by power law or kappa distributions. Using all available fluxes from 2005 to 2010, fits to these distributions reveal a striking and consistent pattern of radial dependence in Saturn's plasma sheet (∣z∣ constant throughout the Cassini mission. Inward of about 10 RS, the presence of the electron radiation belts and losses of lower-energy electrons to the gas and grain environment give rise to the very hard spectra in the inner magnetosphere, while the hard spectra in the outer magnetosphere may derive from auroral acceleration at high latitudes. The gradual softening of the spectra from 20 to 10 RS is explained by inward radial diffusion.

  13. Dynamic Radio Spectra from two Fireballs

    CERN Document Server

    Obenberger, K S; Lin, C S; Dowell, J; Schinzel, F K; Stovall, K

    2015-01-01

    We present dynamic spectra from the LWA1 telescope of two large meteors (fireballs) observed to emit between 37 and 54 MHz. These spectra show the first ever recorded broadband measurements of this newly discovered VHF emission. The spectra show that the emission is smooth and steep, getting very bright at lower frequencies. We suggest that this signal is possibly emission of Langmuir waves and that these waves could be excited by a weak electron beam within the trail. The spectra of one fireball displays broadband temporal frequency sweeps. We suggest that these sweeps are evidence of individual expanding clumps of emitting plasma. While some of these proposed clumps may have formed at the very beginning of the fireball event, others must have formed seconds after the initial event.

  14. X-ray absorption spectra of plasmas

    Institute of Scientific and Technical Information of China (English)

    PENG; Yonglun彭永伦; HAN; Xiaoying韩小英; LI; Jiaming李家明; DING; Yaonan丁耀南; YANG; Jiamin杨家敏; ZHENG; Zhijian郑志坚

    2002-01-01

    In this paper we present a theoretical method to calculate the absorption spectra of hot dense plasmas. Based on our fully relativistic treatment incorporated with the quantum defect theory to handle the huge number of transition arrays from many configurations with high principal quantum number, we can calculate the absorption spectra for any element or multi-element plasmas with little computational efforts. We calculate the absorption spectra of C10H1605 plasmas, which are in good agreement with the experimental spectra. We can then provide diagnostic analysis for plasmas in relevant inertial confinement fusion (lCF) experiments; namely not only to determine plasmas' temperatures and densities, but also to provide the population densities of various ionic stages. Our theoretical method verified by "benchmark experiments" will be a basic tool to provide "precise" opacity data for the ICF research.``

  15. Molecular Dynamics and Picosecond Vibrational Spectra.

    Science.gov (United States)

    1980-07-01

    and Identify by block number) molecular dynamics picosecond infra-red spectra crmputer simulation vibrational spectra array processor linear rcsponse...that for molecular dynamics theoretical computation is now long enough, to significantly overlap. This overlap of theory and experiment can, at least...to discover these microscopic atomic trajectories, i.e. the molecular dynamics of solution processes, we must be able to both theoretically compute

  16. Origin of zero degeneracy in networks spectra

    CERN Document Server

    Yadav, Alok

    2014-01-01

    Spectra of real world networks exhibit properties which are different from the random networks. One such property is the existence of a very high degeneracy at zero eigenvalues. In this work, we provide all the possible reasons behind occurrence of the zero degeneracy in the networks spectra. Comparison of zero degeneracy in protein-protein interaction networks of six different species and in their corresponding model networks sheds light in understanding the evolution of complex biological systems.

  17. Core-level spectra from graphene

    OpenAIRE

    Sernelius, Bo

    2014-01-01

    We calculate core-level spectra for pristine and doped free-standing graphene sheets. Instructions for how to perform the calculations are given in detail. Although pristine graphene is not metallic the core-level spectrum presents low-energy tailing which is characteristic of metallic systems. The peak shapes vary with doping level in a characteristic way. The spectra are compared to experiments and show good agreement. We compare to two different pristine samples and to one doped sample. Th...

  18. Funções executivas em crianças e adolescentes com transtorno do espectro do autismo: uma revisão = Executive functions in children and adolescents with autism spectrum disorder: a revision

    Directory of Open Access Journals (Sweden)

    Czermainski, Fernanda Rasch

    2013-01-01

    Full Text Available Esse artigo consiste em uma revisão sistemática de estudos publicados entre 2001 e 2011, envolvendo avaliação neuropsicológica das funções executivas em crianças e adolescentes com Transtorno do Espectro do Autismo (TEA. Com base nos critérios de inclusão dessa pesquisa, nove estudos foram encontrados, a partir dos termos neuropsychology e executive functions, combinados ao termo autism, nos indexadores LILACS, PubMed e PsycINFO. A análise dos estudos apontou uma tendência de disfunções executivas nos TEA, envolvendo os componentes da inibição, do planejamento, da flexibilidade mental, da fluência verbal e da memória de trabalho. Concluiu-se que componentes executivos preservados e disfuncionais têm sido identificados no TEA, corroborando estudos prévios que apontam progressão desenvolvimental típica e atípica das funções executivas nessa condição

  19. Ajuste de parámetros libres en teorías de campos camaleones a partir de espectros de nubes moleculares galácticas y experimentos terrestres

    Science.gov (United States)

    Teppa Pannia, F. A.; Landau, S. J.

    Resultados recientes, basados en el análisis de espectros moleculares de nubes galácticas a través del método del amoníaco, han arrojado nuevos límites sobre la variación del parámetro adimensional μ=m_e /m_p. Los resultados indican Δ μ/μ = (μ_{obs}-μ_{lab})/μ_{lab}= (2.2± 0.4_{est} ±0.3_{sist}) times 10 ^{-8}, en acuerdo con una variación no nula de dicha cantidad (Levshakov et al. 2010). En este trabajo, motivado por los datos astronómicos, estudiamos la solución lineal del modelo teórico fenomenológico de campo escalar camaleón, presentado por Mota y Shaw (2007), que predice variaciones en μ. Con el fin de cotejar estas predicciones con los resultados observacionales, utilizamos datos de experimentos terrestres que testean violaciones al Principio de Equivalencia para analizar el valor de los parámetros libres presentes en el modelo. El trabajo realizado muestra que la solución estudiada no se puede ajustar a los datos experimentales, sugiriendo que el modelo lineal debe ser descartado para explicar las observaciones astronómicas. FULL TEXT IN SPANISH

  20. Epidemiology of extended spectrum β-lactamase producing Enterobacter bacteremia in a brazilian hospital Epidemiologia de bacteremia causadas por Enterobacter produtores de β-lactamases de espectro estendido em um hospital brasileiro

    Directory of Open Access Journals (Sweden)

    Felipe Francisco Tuon

    2010-08-01

    Full Text Available INTRODUCTION: Enterobacter can be included in the group of extended spectrum β-lactamases (EBSL-producing bacteria, though few studies exist evaluating risk factors associated with this microorganism. A retrospective cohort study was conducted to determine risk factors associated with ESBL-producing-Enterobacter and mortality METHODS: A retrospective cohort study with 58 bacteremia caused by ESBL-producing-Enterobacter (28 cases and non-ESBL (30 cases RESULTS: Risk factors associated with ESBL-Enterobacter were trauma, length of hospitalization, admission to the intensive care unit, urinary catheter and elective surgery (pINTRODUÇÃO: Enterobacter pode ser incluído no grupo de bactérias produtoras de β-lactamases de espectro estendido (ESBL, mas existem poucos estudos avaliando fatores de risco para ESBL. Nós realizamos uma coorte retrospective para determiner fatores de risco associados com Enterobacter produtores de ESBL MÉTODOS: Uma coorte retrospectiva com 58 bacteremias por Enterobacter ESBL (28 casos e não-ESBL (30 casos RESULTADOS: Fatores de risco para ESBL-Enterobacter foram trauma, tempo de internação, admissão em UTI, sonda vesical e cirurgia eletiva (p<0.05. A mortalidade foi similar entre ESBL e não-ESBL CONCLUSÕES: Enterobacter produtor de ESBL é prevalente e a curva de mortalidade foi semelhante com o grupo não-ESBL.

  1. Computer simulation of backscattering spectra from paint

    Science.gov (United States)

    Mayer, M.; Silva, T. F.

    2017-09-01

    To study the role of lateral non-homogeneity on backscattering analysis of paintings, a simplified model of paint consisting of randomly distributed spherical pigment particles embedded in oil/binder has been developed. Backscattering spectra for lead white pigment particles in linseed oil have been calculated for 3 MeV H+ at a scattering angle of 165° for pigment volume concentrations ranging from 30 vol.% to 70 vol.% using the program STRUCTNRA. For identical pigment volume concentrations the heights and shapes of the backscattering spectra depend on the diameter of the pigment particles: This is a structural ambiguity for identical mean atomic concentrations but different lateral arrangement of materials. Only for very small pigment particles the resulting spectra are close to spectra calculated supposing atomic mixing and assuming identical concentrations of all elements. Generally, a good fit can be achieved when evaluating spectra from structured materials assuming atomic mixing of all elements and laterally homogeneous depth distributions. However, the derived depth profiles are inaccurate by a factor of up to 3. The depth range affected by this structural ambiguity ranges from the surface to a depth of roughly 0.5-1 pigment particle diameters. Accurate quantitative evaluation of backscattering spectra from paintings therefore requires taking the correct microstructure of the paint layer into account.

  2. Identifying Broadband Rotational Spectra with Neural Networks

    Science.gov (United States)

    Zaleski, Daniel P.; Prozument, Kirill

    2017-06-01

    A typical broadband rotational spectrum may contain several thousand observable transitions, spanning many species. Identifying the individual spectra, particularly when the dynamic range reaches 1,000:1 or even 10,000:1, can be challenging. One approach is to apply automated fitting routines. In this approach, combinations of 3 transitions can be created to form a "triple", which allows fitting of the A, B, and C rotational constants in a Watson-type Hamiltonian. On a standard desktop computer, with a target molecule of interest, a typical AUTOFIT routine takes 2-12 hours depending on the spectral density. A new approach is to utilize machine learning to train a computer to recognize the patterns (frequency spacing and relative intensities) inherit in rotational spectra and to identify the individual spectra in a raw broadband rotational spectrum. Here, recurrent neural networks have been trained to identify different types of rotational spectra and classify them accordingly. Furthermore, early results in applying convolutional neural networks for spectral object recognition in broadband rotational spectra appear promising. Perez et al. "Broadband Fourier transform rotational spectroscopy for structure determination: The water heptamer." Chem. Phys. Lett., 2013, 571, 1-15. Seifert et al. "AUTOFIT, an Automated Fitting Tool for Broadband Rotational Spectra, and Applications to 1-Hexanal." J. Mol. Spectrosc., 2015, 312, 13-21. Bishop. "Neural networks for pattern recognition." Oxford university press, 1995.

  3. Iterative code for the reconstruction of the neutrons spectrum using the Bonner spheres; Codigo iterativo para la reconstruccion del espectro de neutrones usando las esferas Bonner

    Energy Technology Data Exchange (ETDEWEB)

    Reyes H, A.; Ortiz R, J. M.; Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Ingenieria Electrica, Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico)

    2012-10-15

    The neutrons are the particles more difficult of detecting for their intrinsic nature. The absence of the neutrons charge makes that an interaction exists with the matter in a different way. The term radiation spectrometry can use to describe the measurement of the intensity of a radiation field with regard to the energy. The intensity distribution with relationship to the energy is commonly known as spectrum. A method to know the neutrons spectrum in the radiation fields to those that people are exposed is the use of the known system as spectrometry system of Bonner spheres, being the more used for the purposes of the radiological protection. The current interest in the electrons spectrometry has stimulated the development of several procedures to carry out the reconstruction of the spectra. During the last decades new codes have been developed such as BUNKIUT, Bums, Fruit, UMG, etc., however, these methods still present several inconveniences as the complexity in their use, the necessity of an expert user and a very near initial spectrum to the spectrum that is wanted to obtain. To solve the mentioned problems it was development the program NSDUAZ (Neutron Spectrometry and Dosimetry from Autonomous University of Zacatecas). The objective of the present work is to prove and to validate the code before mentioned making an analysis of likeness and differences and of advantages and disadvantages with relationship to the codes used at the present time. (Author)

  4. Thermal Emission and Albedo Spectra of Super Earths with Flat Transmission Spectra

    CERN Document Server

    Morley, Caroline V; Marley, Mark S; Zahnle, Kevin; Line, Michael; Kempton, Eliza; Lewis, Nikole; Cahoy, Kerri

    2015-01-01

    Planets larger than Earth and smaller than Neptune are some of the most numerous in the galaxy, but observational efforts to understand this population have proved challenging because optically thick clouds or hazes at high altitudes obscure molecular features (Kreidberg et al. 2014b). We present models of super Earths that include thick clouds and hazes and predict their transmission, thermal emission, and reflected light spectra. Very thick, lofted clouds of salts or sulfides in high metallicity (1000x solar) atmospheres create featureless transmission spectra in the near-infrared. Photochemical hazes with a range of particle sizes also create featureless transmission spectra at lower metallicities. Cloudy thermal emission spectra have muted features more like blackbodies, and hazy thermal emission spectra have emission features caused by an inversion layer at altitudes where the haze forms. Close analysis of reflected light from warm (~400-800 K) planets can distinguish cloudy spectra, which have moderate ...

  5. Parameterizing Stellar Spectra Using Deep Neural Networks

    Science.gov (United States)

    Li, Xiang-Ru; Pan, Ru-Yang; Duan, Fu-Qing

    2017-03-01

    Large-scale sky surveys are observing massive amounts of stellar spectra. The large number of stellar spectra makes it necessary to automatically parameterize spectral data, which in turn helps in statistically exploring properties related to the atmospheric parameters. This work focuses on designing an automatic scheme to estimate effective temperature ({T}{eff}), surface gravity ({log}g) and metallicity [Fe/H] from stellar spectra. A scheme based on three deep neural networks (DNNs) is proposed. This scheme consists of the following three procedures: first, the configuration of a DNN is initialized using a series of autoencoder neural networks; second, the DNN is fine-tuned using a gradient descent scheme; third, three atmospheric parameters {T}{eff}, {log}g and [Fe/H] are estimated using the computed DNNs. The constructed DNN is a neural network with six layers (one input layer, one output layer and four hidden layers), for which the number of nodes in the six layers are 3821, 1000, 500, 100, 30 and 1, respectively. This proposed scheme was tested on both real spectra and theoretical spectra from Kurucz’s new opacity distribution function models. Test errors are measured with mean absolute errors (MAEs). The errors on real spectra from the Sloan Digital Sky Survey (SDSS) are 0.1477, 0.0048 and 0.1129 dex for {log}g, {log}{T}{eff} and [Fe/H] (64.85 K for {T}{eff}), respectively. Regarding theoretical spectra from Kurucz’s new opacity distribution function models, the MAE of the test errors are 0.0182, 0.0011 and 0.0112 dex for {log}g, {log}{T}{eff} and [Fe/H] (14.90 K for {T}{eff}), respectively.

  6. Spectra from nuclear-excited plasmas

    Science.gov (United States)

    De Young, R. J.; Weaver, W. R.

    1980-01-01

    The paper discusses the spectra taken from He-3(n,p)H-3 nuclear-induced plasmas under high thermal neutron flux, lasing conditions. Also, initial spectra are presented for U-235F6 generated plasmas. From an evaluation of these spectra, important atomic and molecular processes that occur in the plasma can be inferred. The spectra presented are the first to be generated by He-3 and U-235F6 nuclear reactions under high neutron flux, lasing conditions. The U-235(n,ff)FF reaction, which liberates 165 MeV of fission-fragment kinetic energy, creates plasmas that are of great interest, since at sufficiently high densities of U-235F6 the gas becomes self-critical; thus, there is no need for an external driving reactor (source of neutrons). The spectra from mixtures of He-3 and Ar, Xe, Kr, Ne, Cl2, F2 and N2 indicate little difference between high-pressure nuclear-induced plasmas and high-pressure electrically pulsed afterglow plasmas for noble-gas systems

  7. Background noise spectra of global seismic stations

    Energy Technology Data Exchange (ETDEWEB)

    Wada, M.M.; Claassen, J.P.

    1996-08-01

    Over an extended period of time station noise spectra were collected from various sources for use in estimating the detection and location performance of global networks of seismic stations. As the database of noise spectra enlarged and duplicate entries became available, an effort was mounted to more carefully select station noise spectra while discarding others. This report discusses the methodology and criteria by which the noise spectra were selected. It also identifies and illustrates the station noise spectra which survived the selection process and which currently contribute to the modeling efforts. The resulting catalog of noise statistics not only benefits those who model network performance but also those who wish to select stations on the basis of their noise level as may occur in designing networks or in selecting seismological data for analysis on the basis of station noise level. In view of the various ways by which station noise were estimated by the different contributors, it is advisable that future efforts which predict network performance have available station noise data and spectral estimation methods which are compatible with the statistics underlying seismic noise. This appropriately requires (1) averaging noise over seasonal and/or diurnal cycles, (2) averaging noise over time intervals comparable to those employed by actual detectors, and (3) using logarithmic measures of the noise.

  8. Disk-averaged synthetic spectra of Mars

    Science.gov (United States)

    Tinetti, Giovanna; Meadows, Victoria S.; Crisp, David; Fong, William; Velusamy, Thangasamy; Snively, Heather

    2005-01-01

    The principal goal of the NASA Terrestrial Planet Finder (TPF) and European Space Agency's Darwin mission concepts is to directly detect and characterize extrasolar terrestrial (Earthsized) planets. This first generation of instruments is expected to provide disk-averaged spectra with modest spectral resolution and signal-to-noise. Here we use a spatially and spectrally resolved model of a Mars-like planet to study the detectability of a planet's surface and atmospheric properties from disk-averaged spectra. We explore the detectability as a function of spectral resolution and wavelength range, for both the proposed visible coronograph (TPFC) and mid-infrared interferometer (TPF-I/Darwin) architectures. At the core of our model is a spectrum-resolving (line-by-line) atmospheric/surface radiative transfer model. This model uses observational data as input to generate a database of spatially resolved synthetic spectra for a range of illumination conditions and viewing geometries. The model was validated against spectra recorded by the Mars Global Surveyor-Thermal Emission Spectrometer and the Mariner 9-Infrared Interferometer Spectrometer. Results presented here include disk-averaged synthetic spectra, light curves, and the spectral variability at visible and mid-infrared wavelengths for Mars as a function of viewing angle, illumination, and season. We also considered the differences in the spectral appearance of an increasingly ice-covered Mars, as a function of spectral resolution, signal-to-noise and integration time for both TPF-C and TPFI/ Darwin.

  9. Disk-averaged synthetic spectra of Mars

    Science.gov (United States)

    Tinetti, Giovanna; Meadows, Victoria S.; Crisp, David; Fong, William; Velusamy, Thangasamy; Snively, Heather

    2005-01-01

    The principal goal of the NASA Terrestrial Planet Finder (TPF) and European Space Agency's Darwin mission concepts is to directly detect and characterize extrasolar terrestrial (Earthsized) planets. This first generation of instruments is expected to provide disk-averaged spectra with modest spectral resolution and signal-to-noise. Here we use a spatially and spectrally resolved model of a Mars-like planet to study the detectability of a planet's surface and atmospheric properties from disk-averaged spectra. We explore the detectability as a function of spectral resolution and wavelength range, for both the proposed visible coronograph (TPFC) and mid-infrared interferometer (TPF-I/Darwin) architectures. At the core of our model is a spectrum-resolving (line-by-line) atmospheric/surface radiative transfer model. This model uses observational data as input to generate a database of spatially resolved synthetic spectra for a range of illumination conditions and viewing geometries. The model was validated against spectra recorded by the Mars Global Surveyor-Thermal Emission Spectrometer and the Mariner 9-Infrared Interferometer Spectrometer. Results presented here include disk-averaged synthetic spectra, light curves, and the spectral variability at visible and mid-infrared wavelengths for Mars as a function of viewing angle, illumination, and season. We also considered the differences in the spectral appearance of an increasingly ice-covered Mars, as a function of spectral resolution, signal-to-noise and integration time for both TPF-C and TPFI/ Darwin.

  10. Synthetic spectra: a tool for correlation spectroscopy.

    Science.gov (United States)

    Sinclair, M B; Butler, M A; Ricco, A J; Senturia, S D

    1997-05-20

    We show that computer-generated diffractive optical elements can be used to synthesize the infrared spectra of important compounds, and we describe a modified phase-retrieval algorithm useful for the design of elements of this type. In particular, we present the results of calculations of diffractive elements that are capable of synthesizing portions of the infrared spectra of gaseous hydrogen fluoride (HF) and trichloroethylene (TCE). Further, we propose a new type of correlation spectrometer that uses these diffractive elements rather than reference cells for the production of reference spectra. Storage of a large number of diffractive elements, each producing a synthetic spectrum corresponding to a different target compound, in compact-disk-like format will allow a spectrometer of this type to rapidly determine the composition of unknown samples. Other advantages of the proposed correlation spectrometer are also discussed.

  11. Crystal field spectra of lunar pyroxenes.

    Science.gov (United States)

    Burns, R. G.; Abu-Eid, R. M.; Huggins, F. E.

    1972-01-01

    Absorption spectra in the visible and near infrared regions have been obtained for pyroxene single crystals in rocks from the Apollo 11, 12, 14, and 15 missions. The polarized spectra are compared with those obtained from terrestrial calcic clinopyroxenes, subcalcic augites, pigeonites, and orthopyroxenes. The lunar pyroxenes contain several broad, intense absorption bands in the near infrared, the positions of which are related to bulk composition, Fe(2+) site occupancy and structure type of the pyroxene. The visible spectra contain several sharp, weak peaks mainly due to spin-forbidden transitions in Fe(2+). Additional weak bands in this region in Apollo 11 pyroxenes are attributed to Ti(3+) ions. Spectral features from Fe(3+), Mn(2+), Cr(3+), and Cr(2+) were not observed.

  12. Fast inversion of solar Ca II spectra

    CERN Document Server

    Beck, C; Rezaei, R; Louis, R E

    2014-01-01

    We present a fast (<< 1 s per profile) inversion code for solar Ca II lines. The code uses an archive of spectra that are synthesized prior to the inversion under the assumption of local thermodynamic equilibrium (LTE). We show that it can be successfully applied to spectrograph data or more sparsely sampled spectra from two-dimensional spectrometers. From a comparison to a non-LTE inversion of the same set of spectra, we derive a first-order non-LTE correction to the temperature stratifications derived in the LTE approach. The correction factor is close to unity up to log tau ~ -3 and increases to values of 2.5 and 4 at log tau = -6 in the quiet Sun and the umbra, respectively.

  13. [Vibrational spectra of Hetian nephrite from Xinjiang].

    Science.gov (United States)

    Zhang, Yong-wang; Liu, Yan; Liu, Tao-tao; Muhetaer, Zari; Liu, Yuan-qing

    2012-02-01

    In previous studies, EMPA, PIXE and others were employed to study the chemical compositions of nephrite separately without a systematical measurement. In the present study, XRF, XRD, IR and LR were used together to examine chemical and spectra characteristics of white, green and black nephrite from Hetian, Xinjiang. XRD results indicate that all nephrite samples consist of tremolite. Then IR spectra of nephrite samples suggest that the M-OH stretching vibration bands show that the M1 and M3 sites are not only occupied by Mg2+ and Fe2+, but also by Fe3+, which is consistent with the chemical compositions of these samples. This information might be useful to understanding the variety of nephrite. Their Raman spectra are almost the same, while some differences exist because of different content of FeO/Fe2O3.

  14. Vibrational spectra of molecular fluids in nanopores

    Science.gov (United States)

    Arakcheev, V. G.; Morozov, V. B.

    2012-12-01

    Coherent anti-Stokes Raman spectroscopy (CARS) is applied for quantitative analysis of carbon dioxide phase composition in pores of nanoporous glass samples at nearcritical temperatures. Measurements of the 1388 1/cm Q-branch were made in a wide pressure range corresponding to coexistence of gas (gas-like), adsorbed and condensed phases within pores. At temperatures several degrees below the critical value, CARS spectra behavior is easy to interpret in terms of thermodynamic model of surface adsorption and capillary condensation. It allows estimating mass fractions of different phase components. Moreover, spectra measured at near critical temperatures 30.5 and 33°C have pronounced inhomogeneous shapes and indicate the presence of condensed phase in the volume of pores. The effect obviously reflects the fluid behaviour near the critical point in nanopores. Pores with smaller radii are filled with condensed phase at lower pressures. The analysis of the CARS spectra is informative for quantitative evaluation of phase composition in nanopores.

  15. Janus Spectra in Two-Dimensional Flows

    Science.gov (United States)

    Liu, Chien-Chia; Cerbus, Rory T.; Chakraborty, Pinaki

    2016-09-01

    In large-scale atmospheric flows, soap-film flows, and other two-dimensional flows, the exponent of the turbulent energy spectra, α , may theoretically take either of two distinct values, 3 or 5 /3 , but measurements downstream of obstacles have invariably revealed α =3 . Here we report experiments on soap-film flows where downstream of obstacles there exists a sizable interval in which α transitions from 3 to 5 /3 for the streamwise fluctuations but remains equal to 3 for the transverse fluctuations, as if two mutually independent turbulent fields of disparate dynamics were concurrently active within the flow. This species of turbulent energy spectra, which we term the Janus spectra, has never been observed or predicted theoretically. Our results may open up new vistas in the study of turbulence and geophysical flows.

  16. High precision radial velocities with GIANO spectra

    CERN Document Server

    Carleo, I; Gratton, R; Benatti, S; Bonavita, M; Oliva, E; Origlia, L; Desidera, S; Claudi, R; Sissa, E

    2016-01-01

    Radial velocities (RV) measured from near-infrared (NIR) spectra are a potentially excellent tool to search for extrasolar planets around cool or active stars. High resolution infrared (IR) spectrographs now available are reaching the high precision of visible instruments, with a constant improvement over time. GIANO is an infrared echelle spectrograph at the Telescopio Nazionale Galileo (TNG) and it is a powerful tool to provide high resolution spectra for accurate RV measurements of exoplanets and for chemical and dynamical studies of stellar or extragalactic objects. No other high spectral resolution IR instrument has GIANO's capability to cover the entire NIR wavelength range (0.95-2.45 micron) in a single exposure. In this paper we describe the ensemble of procedures that we have developed to measure high precision RVs on GIANO spectra acquired during the Science Verification (SV) run, using the telluric lines as wavelength reference. We used the Cross Correlation Function (CCF) method to determine the v...

  17. Collective spectra along the fission barrier

    Directory of Open Access Journals (Sweden)

    Pigni M. T.

    2012-12-01

    Full Text Available Discrete and continuous spectra of fissioning nuclei at the humps of fission barriers (Bohr transition states and in the intermediate wells (superdeformed and hyperdeformed states play a key role in the calculation of fission cross sections. A theoretical evaluation of the collective parts of the spectra is possible within the framework of the dinuclear system model, which treats the wave function of the fissioning nucleus as a superposition of a mononucleus configuration and two–cluster configurations in a dynamical way, permitting exchange of upper–shell nucleons between clusters. The impact of theoretical spectra on neutron–induced fission cross sections and, in combination with an improved version of the scission–point model, on angular distribution of fission fragments is evaluated for plutonium isotopes of interest to nuclear energy applications.

  18. Soil emissivity and reflectance spectra measurements.

    Science.gov (United States)

    Sobrino, José A; Mattar, Cristian; Pardo, Pablo; Jiménez-Muñoz, Juan C; Hook, Simon J; Baldridge, Alice; Ibañez, Rafael

    2009-07-01

    We present an analysis of the laboratory reflectance and emissivity spectra of 11 soil samples collected on different field campaigns carried out over a diverse suite of test sites in Europe, North Africa, and South America from 2002 to 2008. Hemispherical reflectance spectra were measured from 2.0 to 14 microm with a Fourier transform infrared spectrometer, and x-ray diffraction analysis (XRD) was used to determine the mineralogical phases of the soil samples. Emissivity spectra were obtained from the hemispherical reflectance measurements using Kirchhoff's law and compared with in situ radiance measurements obtained with a CIMEL Electronique CE312-2 thermal radiometer and converted to emissivity using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) temperature and emissivity separation algorithm. The CIMEL has five narrow bands at approximately the same positions as the ASTER. Results show a root mean square error typically below 0.015 between laboratory emissivity measurements and emissivity measurements derived from the field radiometer.

  19. High resolution spectra of novae and the quadratic zeeman effect

    Directory of Open Access Journals (Sweden)

    Robert Williams

    2006-01-01

    Full Text Available Los espectros de alta resoluci on de novas despu es de las erupciones revelan caracter sticas distintivas en los per les e intensidades de las l neas. Las l neas de Balmer m as altas son frecuentemente m as anchas que los miembros m as bajos de la serie, y los per les e intensidades relativos del doblete [O I] 6300, 6364 di eren de los valores normales. Nosotros sugerimos que estos aspectos pueden ser producidos por el efecto cuadr atico Zeeman desde campos magn eticos que exceden B=106 gauss. Tomadas juntas, las l neas de emisi on y absorci on indican m ultiples or genes para los materiales expulsados, tanto en las enanas blancas eruptivas como en las estrellas secundarias fr as.

  20. Nonlinear FMR spectra in yttrium iron garnet

    Directory of Open Access Journals (Sweden)

    Yu.M. Bunkov, P.M. Vetoshko, I.G. Motygullin, T.R. Safin, M.S. Tagirov, N.A. Tukmakova

    2015-12-01

    Full Text Available Results of demagnetizing effect studies in yttrium iron garnet Y3Fe5O12 thin films are reported. Experiments were performed on X-Band of electron paramagnetic resonance spectrometer at room temperature. The ferromagnetic resonance (FMR spectra were obtained for one-layer single crystal YIG films for different values of the applied microwave power. Nonlinear FMR spectra transformation by the microwave power increasing in various directions of magnetic field sweep was observed. It is explained by the influence of the demagnetization action of nonequilibrium magnons.

  1. Hadron rapidity spectra within a hybrid model

    CERN Document Server

    Khvorostukhin, A S

    2016-01-01

    A 2-stage hybrid model is proposed that joins the fast initial state of interaction, described by the hadron string dynamics (HSD) model, to subsequent evolution of the expanding system at the second stage, treated within ideal hydrodynamics. The developed hybrid model is assigned to describe heavy-ion collisions in the energy range of the NICA collider under construction in Dubna. Generally, the model is in reasonable agreement with the available data on proton rapidity spectra. However, reproducing proton rapidity spectra, our hybrid model cannot describe the rapidity distributions of pions. The model should be improved by taking into consideration viscosity effects at the hydrodynamical stage of system evolution.

  2. Vibrational spectra study on quinolones antibiotics

    Science.gov (United States)

    Wang, Yu; Yu, Ke; Wang, Sihuan

    2006-09-01

    In order to be able to fully understand and easily identify the quilonoles, we collected IR and Raman spectra of six quinolones, and attempted to assign the attribution of the observed frequencies and their association with specific modes of vibration. According to the structure, the compounds were divided into the groups, and the similarities and differences were further studied by comparing. The result of the study shows that the frequency and intensity are comparable to the corresponding structure. The spectra not only have the commonness but also the individualities.

  3. Parallel Genetic Algorithm for Alpha Spectra Fitting

    Science.gov (United States)

    García-Orellana, Carlos J.; Rubio-Montero, Pilar; González-Velasco, Horacio

    2005-01-01

    We present a performance study of alpha-particle spectra fitting using parallel Genetic Algorithm (GA). The method uses a two-step approach. In the first step we run parallel GA to find an initial solution for the second step, in which we use Levenberg-Marquardt (LM) method for a precise final fit. GA is a high resources-demanding method, so we use a Beowulf cluster for parallel simulation. The relationship between simulation time (and parallel efficiency) and processors number is studied using several alpha spectra, with the aim of obtaining a method to estimate the optimal processors number that must be used in a simulation.

  4. Spectra of Linear Polyene Molecule-canthaxanthin

    Institute of Scientific and Technical Information of China (English)

    OUYANG Shun-li; LI Zuo-wei; CHEN Yuan-zheng; MEN Zhi-wei; WU Nan-nan; SUN Cheng-lin

    2011-01-01

    Raman spectra and ultraviolet-visible(UV-Vis) absorption spectra of linear polyene molecule-canthaxanthin in n-hexane are measured and analyzed.In addition,the optimized structure of canthaxanthin was calculated via density functional theory(DFT) functional B3LYP.With decreasing the concentration,Raman scattering cross section (RSCS) of fundamental frequency is extremely high,and the UV-Vis absorption bands become narrower.The results of coherent weakly damped electron-Lattice vibration model were analyzed.

  5. FIT3D: Fitting optical spectra

    Science.gov (United States)

    Sánchez, S. F.; Pérez, E.; Sánchez-Blázquez, P.; González, J. J.; Rosales-Ortega, F. F.; Cano-Díaz, M.; López-Cobá, C.; Marino, R. A.; Gil de Paz, A.; Mollá, M.; López-Sánchez, A. R.; Ascasibar, Y.; Barrera-Ballesteros, J.

    2016-09-01

    FIT3D fits optical spectra to deblend the underlying stellar population and the ionized gas, and extract physical information from each component. FIT3D is focused on the analysis of Integral Field Spectroscopy data, but is not restricted to it, and is the basis of Pipe3D, a pipeline used in the analysis of datasets like CALIFA, MaNGA, and SAMI. It can run iteratively or in an automatic way to derive the parameters of a large set of spectra.

  6. Preprocessing of ionospheric echo Doppler spectra

    Institute of Scientific and Technical Information of China (English)

    FANG Liang; ZHAO Zhengyu; WANG Feng; SU Fanfan

    2007-01-01

    The real-time information of the distant ionosphere can be acquired by using the Wuhan ionospheric oblique backscattering sounding system(WIOBSS),which adopts a discontinuous wave mechanism.After the characteristics of the ionospheric echo Doppler spectra were analyzed,the signal preprocessing was developed in this paper,which aimed at improving the Doppler spectra.The results indicate that the preprocessing not only makes the system acquire a higher ability of target detection but also suppresses the radio frequency interference by 6-7 dB.

  7. Spectra of neutral carbon for plasma diagnostics

    Energy Technology Data Exchange (ETDEWEB)

    Wang, J.G.; Kato, M.; Kato, T.

    2000-10-01

    Recently, carbon pellet experiments have been performed on W-7AS and a few CI lines have been observed in the situation of the pellet cloud from the cold dense plasma to hot ambient plasma. In so large varied conditions, the collisional radiative (CR) model is needed to study the spectra. In this article, a CR model including 79 states with n {<=} 6 and l {<=} 4 is developed, and then the line spectra and line intensity ratios are evaluated in the ionizing and recombining plasma, respective. (author)

  8. Rotational Spectra of Phenylalanine, Tirosine and Tryptophan

    Science.gov (United States)

    Mata, S.; Perez, C.; Sanz, M. E.; Blanco, S.; López, J. C.; Alonso, J. L.

    2009-06-01

    The rotational spectra of the aromatic natural amino acids phenylalanine, tyrosine and tryptophan have been investigated by Laser Ablation Molecular Beam Fourier transform Microwave Spectroscopy LA-MB-FTMW. The spectra of two rotamers of phenylalanine have been detected in the supersonic expansion. Both forms are stabilized by a chain of intramolecular hydrogen bonds O-H\\cdotsN-H\\cdots{π}, being the carboxylic group incis configuration. One conformer of tyrosine, which only differs from phenylalanine in a -OH group inpara position, has been also characterized. Preliminary results on the rotational spectrum of tryptophan are presented.

  9. Algorithms for classification of astronomical object spectra

    Science.gov (United States)

    Wasiewicz, P.; Szuppe, J.; Hryniewicz, K.

    2015-09-01

    Obtaining interesting celestial objects from tens of thousands or even millions of recorded optical-ultraviolet spectra depends not only on the data quality but also on the accuracy of spectra decomposition. Additionally rapidly growing data volumes demands higher computing power and/or more efficient algorithms implementations. In this paper we speed up the process of substracting iron transitions and fitting Gaussian functions to emission peaks utilising C++ and OpenCL methods together with the NOSQL database. In this paper we implemented typical astronomical methods of detecting peaks in comparison to our previous hybrid methods implemented with CUDA.

  10. Augmentation of ENDF/B fission product gamma-ray spectra by calculated spectra

    Energy Technology Data Exchange (ETDEWEB)

    Katakura, J. (Japan Atomic Energy Research Inst., Tokai-mura, Naka-gun, Ibaraki-ken (Japan)); England, T.R. (Los Alamos National Lab., NM (United States))

    1991-11-01

    Gamma-ray spectral data of the ENDF/B-V fission product decay data file have been augmented by calculated spectra. The calculations were performed with a model using beta strength functions and cascade gamma-ray transitions. The calculated spectra were applied to individual fission product nuclides. Comparisons with several hundred measured aggregate gamma spectra after fission were performed to confirm the applicability of the calculated spectra. The augmentation was extended to a preliminary ENDF/B-VI file, and to beta spectra. Appendix C provides information on the total decay energies for individual products and some comparisons of measured and aggregate values based on the preliminary ENDF/B-VI files. 15 refs., 411 figs.

  11. Proton magnetic resonance spectroscopy in children with fetal alcohol spectrum disorders Espectroscopia por ressonância magnética de prótons em crianças com transtornos do espectro alcoólico fetal

    Directory of Open Access Journals (Sweden)

    Rita de Cássia Ferreira Gonçalves

    2009-06-01

    Full Text Available OBJECTIVE: To analyze the metabolic constitution of brain areas through proton magnetic resonance spectroscopy in children affected with fetal alcohol spectrum disorder compared with normal children. METHOD: The sample of this case-control study included eight boys with epidemiologic history of in utero exposure to alcohol (median age 13.6±3.8 years who were diagnosed with fetal alcohol spectrum disorder, and eight controls (median age 12.1±3,4 years. An 8 cm³ single voxel approach was used, with echo time 30 ms, repetition time 1500 ms, and 128 acquisitions in a 1.5T scanner, and four brain areas were analyzed: anterior cingulate, left frontal lobe, left striatum, and left cerebellar hemisphere. Peaks and ratios of metabolites N-acetylaspartate, choline, creatine, and myo-inositol were measured. RESULTS: Children with fetal alcohol spectrum disorder showed a decrease in choline/creatine ratio (p=0.020 in left striatum and an increase in myo-inositol/creatine ratio (p=0.048 in left cerebellum compared with controls. There was no statistically significant difference in all peaks and ratios from the anterior cingulate and frontal lobe between the two groups. CONCLUSION: This study found evidence that the left striatum and left cerebellum are affected by intrauterine exposure to alcohol. Additional studies with larger samples are necessary to expand our knowledge of the effects of fetal exposure to alcohol.OBJETIVO: Analisar a composição metabólica de áreas encefálicas através da espectroscopia de prótons por ressonância magnética em crianças com transtornos do espectro alcoólico fetal e crianças normais. MÉTODO: A amostra deste estudo de casos-controles incluiu 8 meninos com história epidemiológica de exposição fetal ao álcool (idade mediana 13,6±3,8 anos, diagnosticados com transtorno do espectro alcoólico fetal, e 8 controles (idade mediana 12,1±3,4 anos. Utilizou-se voxel único de 8 cm³, tempo de eco 30 ms, tempo de

  12. Adaptação sócio-comunicativa no espectro autístico: dados obtidos com pais e terapeutas Social communicative adaptation in the autistic spectrum: data provided by parents and therapists

    Directory of Open Access Journals (Sweden)

    Priscilla Faria Sousa-Morato

    2009-01-01

    Full Text Available OBJETIVO: Verificar a efetividade da aplicação do protocolo de adaptação sócio-comunicativa a diferentes fontes de informação, neste caso, pais e terapeutas, na identificação de diferenças individuais em crianças com Distúrbios do Espectro Autístico. MÉTODOS: Participaram deste estudo 48 crianças, entre três anos e 11 anos e dez meses de idade, com diagnóstico clínico incluído no espectro autístico. Foram também sujeitos deste trabalho, 46 mães e dois pais, bem como 15 terapeutas, responsáveis legais e pelo atendimento fonoaudiológico especializado, respectivamente, das mesmas crianças, por um período mínimo de aproximadamente 12 meses, sendo que estes participaram respondendo a um questionário sobre o relacionamento social das crianças, sujeitos deste estudo. RESULTADOS: Genericamente, pode-se dizer que as respostas sobre a adaptação sócio-comunicativa, obtidas por meio de diferentes fontes de informação, ou seja, pais e terapeutas foram semelhantes. Entretanto, analisando os dados brutos observa-se que os pais apresentaram consistentemente um número maior de respostas positivas do que as terapeutas, para as questões relativas ao desempenho social. CONCLUSÃO: O estabelecimento de dados de adaptação sócio-comunicativa pode caracterizar esta população, demonstrando que este instrumento pode ser aplicado a diferentes informantes; as respostas dadas pelos mesmos foram homogêneas, reforçando a fidedignidade dos dados, apesar de existirem diferenças significativas na comparação entre os níveis e estágios sócio-comunicativos. A aplicação do questionário e protocolo de adaptação sócio-comunicativa a diferentes informantes pode fornecer um resultado bastante homogêneo, sendo possível realizar de forma fidedigna a caracterização das habilidades de relacionamento social dessas crianças.PURPOSE: To verify if the application of the social-communicative adaptation protocol with different

  13. Pathological gambling and obsessive-compulsive disorder: towards a spectrum of disorders of volition Jogo patológico e transtorno obsessivo-compulsivo: rumo a um espectro de transtornos da volição

    Directory of Open Access Journals (Sweden)

    Hermano Tavares

    2007-06-01

    Full Text Available OBJECTIVE: Pathological gambling is proposed as a participant of an impulsive-compulsive spectrum related to obsessive-compulsive disorder. This study aims to contrast pathological gambling and obsessive-compulsive disorder regarding course, comorbidity, and personality, hence testing the validity of the impulsive-compulsive spectrum. METHOD: 40 pathological gambling and 40 obsessive-compulsive disorder subjects matched to 40 healthy volunteers according to gender, age, and education were assessed with the Temperament Personality Questionnaire and the Barratt Impulsiveness Scale. Psychiatric patients were also assessed for course and comorbidity data. RESULTS: Obsessive-compulsive disorder presented an earlier onset, but the full syndrome took longer to evolve. Pathological gambling had higher comorbidity with substance-related disorders, and obsessive-compulsive disorder higher comorbidity with somatoform disorders. Gamblers scored higher than controls on the sub-factors Impulsiveness, Extravagance, Disorderliness, and Fear of Uncertainty. Obsessive-compulsive patients scored higher than controls on Fear of Uncertai-nty. Impulsiveness, Extravagance, and Disorderliness significantly correlated with the Barratt Impulsiveness Scale total score, Fear of Uncertainty did not. DISCUSSION: The course and comorbidity profiles of pathological gambling resemble an addiction and differ from obsessive-compulsive disorder. Pathological gambling combines impulsive and compulsive traits. Impulsivity and compulsivity should be regarded as orthogonal constructs, and as drives implicated in volition aspects of behavioral syndromes.OBJETIVO: Propõe-se que o jogo patológico faça parte de um espectro impulsivo-compulsivo relacionado ao transtorno obsessivo-compulsivo. O presente estudo propõe-se a comparar o jogo patológico e o transtorno obsessivo-compulsivo em relação a curso, comorbidade e personalidade, a fim de testar a validade do espectro impulsivo

  14. Avaliação da dinâmica espectro-temporal visando o mapeamento dos principais cultivos de verão no Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    Vagner Paz Mengue

    2015-01-01

    Full Text Available O objetivo deste trabalho foi desenvolver uma metodologia de baixo custo para o mapeamento das culturas de verão no Estado do Rio Grande do Sul, a partir do comportamento espectro-temporal de índices de vegetação e o Modelo HAND. O estudo foi realizado no Estado do Rio Grande do Sul, e o período foi a safra 2011/2012. Utilizaram-se imagens EVI do Sensor MODIS e dados SRTM. Para avaliar os resultados, foram usados dados de campo e dados do IBGE, além de um mapa referência elaborado com imagens RapidEye. Os resultados da classificação MODIS e os dados do IBGE geraram um coeficiente de correlação (r de 0,98 para o arroz e 0,89 para a soja. Na validação dos dados coletados em campo, a cultura do arroz irrigado obteve um coeficiente Kappa de 0,66 e a cultura da soja 0,61. Na análise de similaridade Fuzzy, a cultura do arroz irrigado obteve uma similaridade de 87% contra 81% da soja. Portanto, o uso de dados multitemporais do sensor MODIS, aliado à delimitação de áreas de inundação, utilizando o modelo HAND, torna possível disponibilizar dados de estimativa de área cultivada das principais culturas de verão no Estado do Rio Grande do Sul.

  15. A tecnologia assistiva scala como recurso para produção de narrativas e registro de dados nas pesquisas em educação: uma experiência com pessoas adultas com transtorno do espectro autista

    Directory of Open Access Journals (Sweden)

    Ivanise Gomes de Souza Bittencourt

    2017-08-01

    Full Text Available O presente artigo tem por objetivo apresentar o Sistema de Comunicação Alternativa para Letramento de Pessoas com Autismo (SCALA enquanto recurso de produção de narrativas e registro de dados nas pesquisas em educação. Essa tecnologia assistiva foi desenvolvida em 2009 por pesquisadores da Universidade Federal do Rio Grande do Sul (UFRGS e nos anos subsequentes adquiriu novas versões, acrescentando um módulo de narrativas visuais para a construção de histórias nas plataformas web e android/tablet. Através do módulo de narrativas visuais é possível que participantes de pesquisas, principalmente com déficits de comunicação, construam histórias relacionadas a diversos objetos de estudos de pesquisa em educação. Esse estudo foi desenvolvido, entre os meses de abril e maio de 2016, com quatro participantes com Transtorno do Espectro Autista (TEA, com idades entre 30 e 36 anos, sendo uma do sexo feminino e três do sexo masculino. Os resultados evidenciaram o SCALA como uma ferramenta relevante de investigação em educação, especialmente na realização de pesquisas envolvendo alunos com TEA, pois permitiu conhecer as percepções dos participantes quanto aos professores, escola e amigos, seus interesses e dificuldades, experiências positivas e negativas e sentimentos quanto à interrupção do processo de escolarização.

  16. Temporal Evolution of Solar Energetic Particle Spectra

    Science.gov (United States)

    Doran, Donald J.; Dalla, Silvia

    2016-08-01

    During solar flares and coronal mass ejections, Solar Energetic Particles (SEPs) may be released into the interplanetary medium and near-Earth locations. The energy spectra of SEP events at 1 AU are typically averaged over the entire event or studied in a few snapshots. In this article we analyze the time evolution of the energy spectra of four large selected SEP events using a large number of snapshots. We use a multi-spacecraft and multi-instrument approach for the observations, obtained over a wide SEP energy range. We find large differences in the spectra at the beginning of the events as measured by different instruments. We show that over time, a wave-like structure is observed traveling through the spectra from the highest energies to the lowest energies, creating an "arch" shape that then straightens into a power law later in the event, after times on the order of 10 hours. We discuss the processes that determine SEP intensities and their role in shaping the spectral time evolution.

  17. Isobaric-spin relationships between nuclear spectra

    NARCIS (Netherlands)

    French, J.B.

    1961-01-01

    The simple fact that a one-body energy describes the interaction of a nucleon with a closed neutron subshell is used to establish sets of equations connecting the spectra of nuclei which are related by isobaric-spin when described by means of the nuclear shell model. Certain formal questions about i

  18. Hot NH3 Spectra for Astrophysical Applications

    CERN Document Server

    Hargreaves, R J; Bernath, P F

    2011-01-01

    We present line lists for ammonia (NH$_{3}$) at high temperatures obtained by recording Fourier transform infrared emission spectra. Calibrated line lists are presented for twelve temperatures (300 -- 1300$^{\\circ}$C in 100$^{\\circ}$C intervals and 1370$^{\\circ}$C) and each line list covers the 740 -- 2100 cm$^{-1}$ range, which includes the majority of the $\

  19. Measurement of an Electric Arc Spectra

    OpenAIRE

    Šimek, D.

    2015-01-01

    Article is focused on electric arc spectroscopy diagnostics related to electric low voltage apparatuses. The first attempts of spectroscopy measurements are dealt with. An example of radiation spectra of the electric arc burning between copper electrodes is presented. The problems connected with the measurements are discussed.

  20. Cross Ripples and Wave Directional Spectra

    Science.gov (United States)

    Cheel, R. A.; Hay, A. E.

    2006-12-01

    Cross ripples are a 3-dimensional bed state composed of two sets of ripples with different orientations: one set of smaller wavelength (4-10 cm) ripples residing within the troughs of a larger wavelength (30-50 cm) set. Cross ripples occur at intermediate wave energies. In contrast, at slightly higher energies the bed undergoes a transition to a highly 2-dimensional linear transition rippled state. In this study, the characteristics of the wave directional spectra during the occurrences of these 2- and 3-dimensional bed states are compared. The rotary fanbeam sonar record from SandyDuck97 shows that cross ripples and linear transition ripples occurred in approximately 11% and 42% of the sonar images respectively. Wave directional spectra are calculated with the Iterative Maximum Likelihood Method from collocated measurements of pressure and horizontal velocity. Using the sonar record and wave directional spectra the correlation between bimodal wave directional spectra and the occurrence of the two distinct ripple types is examined and compared. Since ripple crest alignment is typically orthogonal to the direction of wave propagation, one possible creation mechanism for cross ripples is a bidirectional wave field. We find that bimodality of the wave spectrum, neither in direction nor in frequency, is unique to the occurrence of cross ripples.

  1. RAMAN-SPECTRA OF HUMAN DENTAL CALCULUS

    NARCIS (Netherlands)

    TSUDA, H; ARENDS, J

    1993-01-01

    Raman spectra of human dental calculus have been observed for the first time by use of micro-Raman spectroscopy. The spectral features of calculus were influenced easily by heating caused by laser irradiation. Therefore, the measurements were carried out at relatively low power (5 mW, 1-mu m spot

  2. Analysis of COSIMA spectra: Bayesian approach

    Directory of Open Access Journals (Sweden)

    H. J. Lehto

    2015-06-01

    secondary ion mass spectrometer (TOF-SIMS spectra. The method is applied to the COmetary Secondary Ion Mass Analyzer (COSIMA TOF-SIMS mass spectra where the analysis can be broken into subgroups of lines close to integer mass values. The effects of the instrumental dead time are discussed in a new way. The method finds the joint probability density functions of measured line parameters (number of lines, and their widths, peak amplitudes, integrated amplitudes and positions. In the case of two or more lines, these distributions can take complex forms. The derived line parameters can be used to further calibrate the mass scaling of TOF-SIMS and to feed the results into other analysis methods such as multivariate analyses of spectra. We intend to use the method, first as a comprehensive tool to perform quantitative analysis of spectra, and second as a fast tool for studying interesting targets for obtaining additional TOF-SIMS measurements of the sample, a property unique to COSIMA. Finally, we point out that the Bayesian method can be thought of as a means to solve inverse problems but with forward calculations, only with no iterative corrections or other manipulation of the observed data.

  3. Variations on supersymmetry breaking and neutrino spectra

    Energy Technology Data Exchange (ETDEWEB)

    Borzumati, F.; Hamaguchi, K.; Nomura, Y.; Yanagida, T.

    2000-12-11

    The problem of generating light neutrinos within supersymmetric models is discussed. It is shown that the hierarchy of scales induced by supersymmetry breaking can give rise to suppression factors of the correct order of magnitude to produce experimentally allowed neutrino spectra.

  4. Principal component analysis of phenolic acid spectra

    Science.gov (United States)

    Phenolic acids are common plant metabolites that exhibit bioactive properties and have applications in functional food and animal feed formulations. The ultraviolet (UV) and infrared (IR) spectra of four closely related phenolic acid structures were evaluated by principal component analysis (PCA) to...

  5. Oxidation of carbynes: signatures in infrared spectra

    NARCIS (Netherlands)

    Cinquanta, Eugenio; Manini, Nicola; Ravagnan, Luca; Caramella, Lucia; Onida, Giovanni; Milani, Paolo; Rudolf, Petra

    2014-01-01

    We report and solidly interpret the infrared spectrum of both pristine and oxidized carbynes embedded in a pure-carbon matrix. The spectra probe separately the effects of oxidation on sp- and on sp 2-hybridized carbon, and provide information on the stability of the different structures in an

  6. Automatic abundance analysis of high resolution spectra

    CERN Document Server

    Bonifacio, P; Bonifacio, Piercarlo; Caffau, Elisabetta

    2003-01-01

    We describe an automatic procedure for determining abundances from high resolution spectra. Such procedures are becoming increasingly important as large amounts of data are delivered from 8m telescopes and their high-multiplexing fiber facilities, such as FLAMES on ESO-VLT. The present procedure is specifically targeted for the analysis of spectra of giants in the Sgr dSph; however, the procedure may be, in principle, tailored to analyse stars of any type. Emphasis is placed on the algorithms and on the stability of the method; the external accuracy rests, ultimately, on the reliability of the theoretical models (model-atmospheres, synthetic spectra) used to interpret the data. Comparison of the results of the procedure with the results of a traditional analysis for 12 Sgr giants shows that abundances accurate at the level of 0.2 dex, comparable with that of traditional analysis of the same spectra, may be derived in a fast and efficient way. Such automatic procedures are not meant to replace the traditional ...

  7. Discriminating Dysarthria Type from Envelope Modulation Spectra

    Science.gov (United States)

    Liss, Julie M.; LeGendre, Sue; Lotto, Andrew J.

    2010-01-01

    Purpose: Previous research demonstrated the ability of temporally based rhythm metrics to distinguish among dysarthrias with different prosodic deficit profiles (J. M. Liss et al., 2009). The authors examined whether comparable results could be obtained by an automated analysis of speech envelope modulation spectra (EMS), which quantifies the…

  8. Solar Energetic Particle Spectra Measured with PAMELA

    Science.gov (United States)

    Ryan, James; Bruno, Alessandro; Boezio, Mirko; Bravar, Ulisse; Christian, Eric; Georgia, De Nolfo; Martucci, Matteo; Merge, Matteo; Munini, Riccardo; Sparvoli, Roberta; Stochaj, Steven; Pamela Collaboration

    2017-01-01

    We have measured the event integrated spectra from several SEP events from 2006 to 2014 in the energy range starting at 80 MeV and extending well above the neutron monitor threshold. The PAMELA instrument is in a high inclination, low Earth orbit and has access to SEPs when at high geographic latitudes. This means that the spectra have been assembled from regularly spaced measurements with gaps during the course of the event. Furthermore, the field of view of PAMELA is small and during the high latitude passes it scans a wide range of asymptotic directions as the spacecraft moves. Correcting for data gaps and solid angle effects, we have compiled event-integrated intensity spectra that typically exhibit power law shapes in energy with an exponential roll over. The events analyzed include two, maybe three, GLEs. In those cases the roll over energy lies above the neutron monitor threshold (1 GV) while the others are lower. We see no qualitative difference between the spectra of GLE vs. non-GLE events. National Science Foundation, NASA, Italian Space Agency, Russian Space Agency.

  9. Students' Mental Models of Atomic Spectra

    Science.gov (United States)

    Körhasan, Nilüfer Didis; Wang, Lu

    2016-01-01

    Mental modeling, which is a theory about knowledge organization, has been recently studied by science educators to examine students' understanding of scientific concepts. This qualitative study investigates undergraduate students' mental models of atomic spectra. Nine second-year physics students, who have already taken the basic chemistry and…

  10. RAMAN-SPECTRA OF HUMAN DENTAL CALCULUS

    NARCIS (Netherlands)

    TSUDA, H; ARENDS, J

    1993-01-01

    Raman spectra of human dental calculus have been observed for the first time by use of micro-Raman spectroscopy. The spectral features of calculus were influenced easily by heating caused by laser irradiation. Therefore, the measurements were carried out at relatively low power (5 mW, 1-mu m spot si

  11. Fitting PAC spectra with a hybrid algorithm

    Energy Technology Data Exchange (ETDEWEB)

    Alves, M. A., E-mail: mauro@sepn.org [Instituto de Aeronautica e Espaco (Brazil); Carbonari, A. W., E-mail: carbonar@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (Brazil)

    2008-01-15

    A hybrid algorithm (HA) that blends features of genetic algorithms (GA) and simulated annealing (SA) was implemented for simultaneous fits of perturbed angular correlation (PAC) spectra. The main characteristic of the HA is the incorporation of a selection criterion based on SA into the basic structure of GA. The results obtained with the HA compare favorably with fits performed with conventional methods.

  12. Mid-infrared spectra of comet nuclei

    CERN Document Server

    Kelley, Michael S P; Gehrz, Robert D; Reach, William T; Harker, David E

    2016-01-01

    Jovian Trojan D-type asteroids have mid-infrared emissivity features strikingly similar to comet comae, suggesting that they have the same compositions and that the surfaces of the Trojans are highly porous. However, a direct comparison between a comet and asteroid surface has not been possible due to the paucity of spectra of comet nuclei at mid-infrared wavelengths. We present 5-35 {\\mu}m thermal emission spectra of comets 10P/Tempel 2, and 49P/Arend-Rigaux observed with the Infrared Spectrograph on the Spitzer Space Telescope. Our analysis suggests the spectra are dominated by the comet nucleus. We fit each spectrum with the near-Earth asteroid thermal model (NEATM) and find sizes in agreement with previous values. However, the NEATM beaming parameters of the nuclei, 0.74 to 0.83, are systematically lower than the Jupiter-family comet population mean of 1.03+/-0.11, derived from 16- and 22-{\\mu}m photometry. When the spectra are normalized by the NEATM model, a weak 10-{\\mu}m silicate plateau is evident, w...

  13. Vibrational Spectra of a Mechanosensitive Channel

    NARCIS (Netherlands)

    Liang, Chungwen; Louhivuori, Martti; Marrink, Siewert J.; Jansen, Thomas L.C.; Knoester, Jasper

    2013-01-01

    We report the simulated vibrational spectra of a mechanosensitive membrane channel in different gating states. Our results show that while linear absorption is insensitive to structural differences, linear dichroism and sum-frequency generation spectroscopies are sensitive to the orientation of the

  14. Exploring the Morphology of RAVE Stellar Spectra

    NARCIS (Netherlands)

    Matijevic, G.; Zwitter, T.; Bienayme, O.; Bland-Hawthorn, J.; Boeche, C.; Freeman, K. C.; Gibson, B. K.; Gilmore, G.; Grebel, E. K.; Helmi, A.; Munari, U.; Navarro, J.; Parker, Q. A.; Reid, W.; Seabroke, G.; Siebert, A.; Siviero, A.; Steinmetz, M.; Watson, F. G.; Williams, M.; Wyse, R. F. G.

    The RAdial Velocity Experiment (RAVE) is a medium-resolution (R similar to 7500) spectroscopic survey of the Milky Way that has already obtained over half a million stellar spectra. They present a randomly selected magnitude-limited sample, so it is important to use a reliable and automated

  15. Polarization Spectra of Extrasolar Giant Planets

    NARCIS (Netherlands)

    Stam, D.M.

    2004-01-01

    We present simulated spectra of the flux and degree of polarization of starlight that is reflected by extrasolar giant planets (EGPs). In particular the polarization depends strongly on the structure of the planetary atmosphere, and appears to be a valuable tool for the characterization of EGPs.

  16. Disk-averaged synthetic spectra of Mars

    CERN Document Server

    Tinetti, G; Fong, W; Meadows, V S; Snively, H; Velusamy, T; Crisp, David; Fong, William; Meadows, Victoria S.; Snively, Heather; Tinetti, Giovanna; Velusamy, Thangasamy

    2004-01-01

    The principal goal of the NASA Terrestrial Planet Finder (TPF) and ESA Darwin mission concepts is to directly detect and characterize extrasolar terrestrial (Earth-sized) planets. This first generation of instruments is expected to provide disk-averaged spectra with modest spectral resolution and signal-to-noise. Here we use a spatially and spectrally resolved model of the planet Mars to study the detectability of a planet's surface and atmospheric properties from disk-averaged spectra as a function of spectral resolution and wavelength range, for both the proposed visible coronograph (TPF-C) and mid-infrared interferometer (TPF-I/Darwin) architectures. At the core of our model is a spectrum-resolving (line-by-line) atmospheric/surface radiative transfer model which uses observational data as input to generate a database of spatially-resolved synthetic spectra for a range of illumination conditions (phase angles) and viewing geometries. Results presented here include disk averaged synthetic spectra, light-cur...

  17. Mid-infrared spectra of comet nuclei

    Science.gov (United States)

    Kelley, Michael S. P.; Woodward, Charles E.; Gehrz, Robert D.; Reach, William T.; Harker, David E.

    2017-03-01

    Comet nuclei and D-type asteroids have several similarities at optical and near-IR wavelengths, including near-featureless red reflectance spectra, and low albedos. Mineral identifications based on these characteristics are fraught with degeneracies, although some general trends can be identified. In contrast, spectral emissivity features in the mid-infrared provide important compositional information that might not otherwise be achievable. Jovian Trojan D-type asteroids have emissivity features strikingly similar to comet comae, suggesting that they have the same compositions and that the surfaces of the Trojans are highly porous. However, a direct comparison between a comet and asteroid surface has not been possible due to the paucity of spectra of comet nuclei at mid-infrared wavelengths. We present 5-35 μm thermal emission spectra of comets 10P/Tempel 2, and 49P/Arend-Rigaux observed with the Infrared Spectrograph on the Spitzer Space Telescope. Our analysis reveals no evidence for a coma or tail at the time of observation, suggesting the spectra are dominated by the comet nucleus. We fit each spectrum with the near-Earth asteroid thermal model (NEATM) and find sizes in agreement with previous values. However, the NEATM beaming parameters of the nuclei, 0.74-0.83, are systematically lower than the Jupiter-family comet population mean of 1.03 ± 0.11, derived from 16- and 22-μm photometry. We suggest this may be either an artifact of the spectral reduction, or the consequence of an emissivity low near 16 μm. When the spectra are normalized by the NEATM model, a weak 10-μm silicate plateau is evident, with a shape similar to those seen in mid-infrared spectra of D-type asteroids. A silicate plateau is also evident in previously published Spitzer spectra of the nucleus of comet 9P/Tempel 1. We compare, in detail, these comet nucleus emission features to those seen in spectra of the Jovian Trojan D-types (624) Hektor, (911) Agamemnon, and (1172) Aneas, as well

  18. An Interactive Gallery of Planetary Nebula Spectra

    Science.gov (United States)

    Kwitter, K. B.; Henry, R. B. C.

    2002-12-01

    We have created a website containing high-quality moderate-resolution spectra of 88 planetary nebulae (PNe) from 3600 to 9600 Å, obtained at KPNO and CTIO. Spectra are displayed in a zoomable window, and there are templates available that show wavelength and ion identifications. In addition to the spectra themselves, the website also contains a brief discussion of PNe as astronomical objects and as contributors to our understanding of stellar evolution, and a table with atlas information for each object along with a link to an image. This table can be re-ordered by object name, galactic or equatorial coordinates, distance from the sun, the galactic center, or the galactic plane. We envision that this website, which concentrates a large amount of data in one place, will be of interest to a variety of users. PN researchers might need to check the spectrum of a particular object of interest; the non-specialist astronomer might simply be interested in perusing such a collection of spectra; and finally, teachers of introductory astronomy can use this database to illustrate basic principles of atomic physics and radiation. To encourage such use, we have written two simple exercises at a basic level to introduce beginning astronomy students to the wealth of information that PN spectra contain. We are grateful to Adam Wang of the Williams College OIT and to his summer student teams who worked on various apects of the implementation of this website. This work has been supported by NSF grant AST-9819123 and by Williams College and the University of Oklahoma.

  19. Raman spectra of carotenoids in natural products

    Science.gov (United States)

    Withnall, Robert; Chowdhry, Babur Z.; Silver, Jack; Edwards, Howell G. M.; de Oliveira, Luiz F. C.

    2003-08-01

    Resonance Raman spectra of naturally occurring carotenoids have been obtained from nautilus, periwinkle ( Littorina littorea) and clam shells under 514.5 nm excitation and these spectra are compared with the resonance Raman spectra obtained in situ from tomatoes, carrots, red peppers and saffron. The tomatoes, carrots and red peppers gave rise to resonance Raman spectra exhibiting a ν1 band at ca. 1520 cm -1, in keeping with its assignment to carotenoids with ca. nine conjugated carboncarbon double bonds in their main chains, whereas the resonance Raman spectrum of saffron showed a ν1 band at 1537 cm -1 which can be assigned to crocetin, having seven conjugated carboncarbon double bonds. A correlation between ν1 wavenumber location and effective conjugated chain length has been used to interpret the data obtained from the shells, and the wavenumber position (1522 cm -1) of the ν1 band of the carotenoid in the orange clam shell suggests that it contains nine conjugated double bonds in the main chain. However, the black periwinkle and nautilus shells exhibit ν1 bands at 1504 and 1496 cm -1, respectively. On the basis of the correlation between ν1 wavenumber location and effective conjugated chain length, this indicates that they contain carotenoids with longer conjugated chains, the former having ca. 11 double bonds and the latter ca. 13 or even more. Raman spectra of the nautilus, periwinkle and clam shells also exhibited a strong band at 1085 cm -1 and a doublet with components at 701 and 705 cm -1, which can be assigned to biogenic calcium carbonate in the aragonite crystallographic form.

  20. Discrimination of phytoplankton classes using characteristic spectra of 3D fluorescence spectra.

    Science.gov (United States)

    Zhang, Qian-Qian; Lei, Shu-He; Wang, Xiu-Lin; Wang, Lei; Zhu, Chen-Jian

    2006-02-01

    The discrimination of phytoplankton classes using the characteristic fluorescence spectra extracted from three-dimensional fluorescence spectra was investigated. Single species cultures of 11 phytoplankton species, representing 5 major phytoplankton divisions, were used. The 3D fluorescence spectra of the cultures grown at different temperatures (20 and 15 degrees C) and illumination intensities (140, 80 and 30 microM m(-2) s(-1)) were measured and their feature extraction methods were explored. Ordering Rayleigh and Raman scattering data as zero, the obtained excitation-emission matrices were processed by both singular value decomposition (SVD) and trilinear decomposition methods. The resulting first principal component can be regarded as the characteristic spectrum of the original 3D fluorescence spectrum. The analysis shows that such characteristic spectra have a discriminatory capability. At different temperatures, the characteristic spectra of Isochrysis galbana, Platymonas helgolanidica and Skeletonema costatuma have high degrees of similarity to their own species samples, while the spectra similarities of Alexandrium tamarense, Prorocentrum dentatum, Pseudo-nitzschia pungens, Chaetoceros curvisetus, Ch. Debilis, Ch. Didymus and Synechococcus sp. are not as significant as the other three species. C. curvisetus, Ch. Debilis and Ch. Didymus, belonging to genus Chaetoceros, have identical spectra and cannot be discriminated at all. Regarding all six diatom species as one class, the average discriminant error rate is below 9%. It is worth mentioning that the diatom class can be distinguished from A. tamarense and P. dentatum, which belong to Dinophyta.

  1. Discrimination of phytoplankton classes using characteristic spectra of 3D fluorescence spectra

    Science.gov (United States)

    Zhang, Qian-Qian; Lei, Shu-He; Wang, Xiu-Lin; Wang, Lei; Zhu, Chen-Jian

    2006-02-01

    The discrimination of phytoplankton classes using the characteristic fluorescence spectra extracted from three-dimensional fluorescence spectra was investigated. Single species cultures of 11 phytoplankton species, representing 5 major phytoplankton divisions, were used. The 3D fluorescence spectra of the cultures grown at different temperatures (20 and 15 °C) and illumination intensities (140, 80 and 30 μM m -2 s -1) were measured and their feature extraction methods were explored. Ordering Rayleigh and Raman scattering data as zero, the obtained excitation-emission matrices were processed by both singular value decomposition (SVD) and trilinear decomposition methods. The resulting first principal component can be regarded as the characteristic spectrum of the original 3D fluorescence spectrum. The analysis shows that such characteristic spectra have a discriminatory capability. At different temperatures, the characteristic spectra of Isochrysis galbana, Platymonas helgolanidica and Skeletonema costatuma have high degrees of similarity to their own species samples, while the spectra similarities of Alexandrium tamarense, Prorocentrum dentatum, Pseudo-nitzschia pungens, Chaetoceros curvisetus, Ch. Debilis, Ch. Didymus and Synechococcus sp. are not as significant as the other three species. C. curvisetus, Ch. Debilis and Ch. Didymus, belonging to genus Chaetoceros, have identical spectra and cannot be discriminated at all. Regarding all six diatom species as one class, the average discriminant error rate is below 9%. It is worth mentioning that the diatom class can be distinguished from A. tamarense and P. dentatum, which belong to Dinophyta.

  2. Aplicación del espectro electromagnético en el aprendizaje de los estudiantes en la asignatura de análisis instrumental en la Escuela Académica Profesional de Ingeniería Metalúrgica en la Universidad Nacional José Faustino Sánchez Carrión - 2013.

    OpenAIRE

    Salcedo Meza, Máximo Tomás

    2015-01-01

    Universidad Nacional de Educacion - UNE En la presente investigación se estudia el siguiente problema: ¿Cuál es el nivel de influencia de la aplicación del espectro electromagnético en el aprendizaje de los estudiantes de la asignatura de Análisis Instrumental de la Escuela Académica Profesional de Ingeniería Metalúrgica en la Universidad Nacional José Faustino Sánchez Carrión, 2013?. La muestra de estudio estuvo conformada por dos grupos: uno experimental de 18 estudiantes, y el grupo de ...

  3. Moessbauer spectra of tin in float glass

    Energy Technology Data Exchange (ETDEWEB)

    Johnson, J.A. [Liverpool John Moores Univ. (United Kingdom). Sch. of the Built Environ.; Johnson, C.E. [Liverpool Univ. (United Kingdom). Dept. of Physics; Williams, K.F.E. [Liverpool Univ. (United Kingdom). Dept. of Physics; Holland, D. [Warwick Univ., Coventry (United Kingdom). Dept. of Physics; Karim, M.M. [Warwick Univ., Coventry (United Kingdom). Dept. of Physics

    1995-03-01

    Tin is not a major constituent of window glass, but is found at high concentrations in the lower surface of float glass which has been in contact with the molten tin bath. It does not extend far into the surface, but causes the physical and chemical behaviour to differ from that of the upper surface. It is important, therefore, to understand the structural role of tin in silicate glasses and thus its effect on various properties. Moessbauer spectra were taken of three series of glassy materials, namely binary glasses (SnO and SiO{sub 2}) in varying proportions, re-melted float glass containing tin, and float glass from a production plant. The binary glasses contained between 20 and 70% tin which was found to be mainly Sn{sup 2+}, with very small amounts of Sn{sup 4+} in some of them. The spectra showed a small decrease in isomer shift with increase in tine content, which is ascribed to the change in molar volume. The re-melted samples were float glass which was mixed with stannous oxalate in appropriate conditions to try and maintain tin in the 2+ state, and contained up to 15% tin by weight. The spectra show both Sn{sup 4+} and Sn{sup 2+} with rather more in the 4+ oxidation state. The change in the spectra as a function of temperature revealed a large difference in the f-factor (and hence the chemical binding) of the two states. A series of spectra was taken between 17.5 and 900 K for the sample containing 15% tin. From the absorption as a function of temperature the f-factor was determined for both oxidation states, and hence enabled the relative amounts of Sn{sup 4+} and Sn{sup 2+} present in each sample to be estimated. Measurements of the shift as a function of temperature were also made. The float samples were surface material produced by grinding away all but 0.1 mm of the lower surface of industrially produced float glass. The Moessbauer spectra showed them to be predominantly Sn{sup 2+}, as expected from the reducing atmosphere in the float plant.

  4. EMPCA and Cluster Analysis of Quasar Spectra: Construction and Application to Simulated Spectra

    Science.gov (United States)

    Marrs, Adam; Leighly, Karen; Wagner, Cassidy; Macinnis, Francis

    2017-01-01

    Quasars have complex spectra with emission lines influenced by many factors. Therefore, to fully describe the spectrum requires specification of a large number of parameters, such as line equivalent width, blueshift, and ratios. Principal Component Analysis (PCA) aims to construct eigenvectors-or principal components-from the data with the goal of finding a few key parameters that can be used to predict the rest of the spectrum fairly well. Analysis of simulated quasar spectra was used to verify and justify our modified application of PCA.We used a variant of PCA called Weighted Expectation Maximization PCA (EMPCA; Bailey 2012) along with k-means cluster analysis to analyze simulated quasar spectra. Our approach combines both analytical methods to address two known problems with classical PCA. EMPCA uses weights to account for uncertainty and missing points in the spectra. K-means groups similar spectra together to address the nonlinearity of quasar spectra, specifically variance in blueshifts and widths of the emission lines.In producing and analyzing simulations, we first tested the effects of varying equivalent widths and blueshifts on the derived principal components, and explored the differences between standard PCA and EMPCA. We also tested the effects of varying signal-to-noise ratio. Next we used the results of fits to composite quasar spectra (see accompanying poster by Wagner et al.) to construct a set of realistic simulated spectra, and subjected those spectra to the EMPCA /k-means analysis. We concluded that our approach was validated when we found that the mean spectra from our k-means clusters derived from PCA projection coefficients reproduced the trends observed in the composite spectra.Furthermore, our method needed only two eigenvectors to identify both sets of correlations used to construct the simulations, as well as indicating the linear and nonlinear segments. Comparing this to regular PCA, which can require a dozen or more components, or to

  5. Raman spectra of shocked minerals. I. Olivine

    Energy Technology Data Exchange (ETDEWEB)

    Heymann, D.; Celucci, T.A.

    1988-12-01

    The Raman spectra of olivine contained in a chip of the Twin Sisters Peak (Washington) dunite shocked to 22.2 GPa is shown to be identical to that of unshocked olivine in the same rock. The Raman spectra of powder of the rock shocked to 20.1 GPa and of chips shocked to 59.5 GPa and 60.7 GPa display strong and broad low-frequency features with crests at 475/cm, 556/cm, and 572/cm, and broad high-frequency features near 1100/cm. It is suggested that these features are due to the formation of olivine glass with a considerable degree of three-dimensional Si-O-Si linkage having scattered domains of greatly variable grain size, internal structure, and chemical composition. 54 references.

  6. Raman spectra of shocked minerals. I - Olivine

    Science.gov (United States)

    Heymann, D.; Celucci, T. A.

    1988-01-01

    The Raman spectra of olivine contained in a chip of the Twin Sisters Peak (Washington) dunite shocked to 22.2 GPa is shown to be identical to that of unshocked olivine in the same rock. The Raman spectra of powder of the rock shocked to 20.1 GPa and of chips shocked to 59.5 GPa and 60.7 GPa display strong and broad low-frequency features with crests at 475/cm, 556/cm, and 572/cm, and broad high-frequency features near 1100/cm. It is suggested that these features are due to the formation of olivine glass with a considerable degree of three-dimensional Si-O-Si linkage having scattered domains of greatly variable grain size, internal structure, and chemical composition.

  7. Slit Spectra of Second Byurakan Survey Galaxies

    Science.gov (United States)

    Osterbrock, D. E.; Martel, A.

    1993-12-01

    Slit spectra have been obtained at Lick Observatory of 18 Seyfert galaxy candidates from the Second Byurakan Spectral Sky Survey (SBS). The great majority of them turned out to be Seyfert galaxies. The classifications and redshifts of all the galaxies are reported. Measurements of the intensity ratios of the emission lines used in classifying the galaxies are tabulated and plotted on diagnostic diagrams. The spectra of seven of the galaxies are described in detail. In general, our classification and redshift measurements are in very good accord with those of Lipovetsky, Stepanian, and their collaborators at the Special Astrophysical Observatory, showing that their results can be used in conjunction with the Lick results with little if any systematic difference between the two data sets. The importance of the SBS as a source of new Seyferts bridging the gap between low-redshift Seyfert galaxies and higher-luminosity QSOs is also emphasized.

  8. Infrared spectra of FHF - in alkali halides

    Science.gov (United States)

    Chunnilall, C. J.; Sherman, W. F.

    1982-03-01

    The bifluoride ion, FHF -, has been substitutionally isolated within single crystal samples of several different alkali halides. Infrared spectra of these crystals have been studied for sample temperatures down to 8K when half-bandwidths of less than 1 cm -1 have been observed. (Note that at room temperature ν 3 is observed to have a half-bandwidth of about 40 cm -1). The frequency shifts and half-bandwidth changes caused by cooling are considered together with the frequency shifts caused by pressures up to 10 k bar. The low temperature spectra clearly indicate that FHF - is a linear symmetrical ion when substitutionally isolated within alkali halides of either the NaCl or CsCl structure.

  9. Electron spectra of radical cations of heteroanalogs

    Energy Technology Data Exchange (ETDEWEB)

    Petrushenko, K.B.; Turchaninov, V.K.; Vokin, A.I.; Ermikov, A.F.; Frolov, Yu.L.

    1985-12-01

    Radical cation spectra of indazole and benzothiophene in the visible region were obtained by laser photolysis during the reaction of photoexcited quinones with these compounds in acetonitrile. The charge transfer bands of the complexes of the test compounds with p-chloranil and 7,7,8,8-tetracyanoquinodimethane in dioxane were recorded on a Specord M-40. Photoelectron spectra were obtained on a ES-3201 electron spectrometer. The He(I) resonance band (21.21 eV) was used for excitation. Measurements were carried out in the 60-120/sup 0/C range. The energy scale was calibrated form the first ionization potentials of Ar (15.76 eV) and chlorobenzene (9.06 eV). The error in the determination of the ionization potentials for the first four photoelectron bands was 0.05 eV.

  10. Benchmarking statistical averaging of spectra with HULLAC

    Science.gov (United States)

    Klapisch, Marcel; Busquet, Michel

    2008-11-01

    Knowledge of radiative properties of hot plasmas is important for ICF, astrophysics, etc When mid-Z or high-Z elements are present, the spectra are so complex that one commonly uses statistically averaged description of atomic systems [1]. In a recent experiment on Fe[2], performed under controlled conditions, high resolution transmission spectra were obtained. The new version of HULLAC [3] allows the use of the same model with different levels of details/averaging. We will take advantage of this feature to check the effect of averaging with comparison with experiment. [1] A Bar-Shalom, J Oreg, and M Klapisch, J. Quant. Spectros. Rad. Transf. 65, 43 (2000). [2] J. E. Bailey, G. A. Rochau, C. A. Iglesias et al., Phys. Rev. Lett. 99, 265002-4 (2007). [3]. M. Klapisch, M. Busquet, and A. Bar-Shalom, AIP Conference Proceedings 926, 206-15 (2007).

  11. Energy spectra in relativistic electron precipitation events.

    Science.gov (United States)

    Rosenberg, T. J.; Lanzerotti, L. J.; Bailey, D. K.; Pierson, J. D.

    1972-01-01

    Two events in August 1967, categorized as relativistic electron precipitation (REP) events by their effect on VHF transmissions propagated via the forward-scatter mode, have been examined with regard to the energy spectra of trapped and precipitated electrons. These two substorm-associated events August 11 and August 25 differ with respect to the relativistic, trapped electron population at synchronous altitude; in the August 25 event there was a nonadiabatic enhancement of relativistic (greater than 400 keV) electrons, while in the August 11 event no relativistic electrons were produced. In both events electron spectra deduced from bremsstrahlung measurements (made on a field line close to that of the satellite) had approximately the same e-folding energies as the trapped electron enhancements. However, the spectrum of electrons in the August 25 event was significantly harder than the spectrum in the event of August 11.

  12. Measurement and interpretation of plutonium spectra

    Energy Technology Data Exchange (ETDEWEB)

    Blaise, J.; Fred, M.S.; Carnall, W.T.; Crosswhite, H.M.; Crosswhite, H.

    1982-01-01

    The atomic spectroscopic data available for plutonium are among the rickest of any in the periodic system. They include high-resolution grating and Fourier-transform spectra as well as extensive Zeeman and isotope-shift studies. We summarize the present status of the term analysis and cite the configurations that have been identified. A least-squares adjustment of a parametric Hamiltonian for configurations of both Pu I and Pu II has shown that almost all of the expected low levels are now known. The use of a model Hamiltonian applicable to both lanthanide and actinide atomic species has been applied to the low configurations of Pu I and Pu II making use of trends predicted by ab initio calculations. This same model has been used to describe the energy levels of Pu/sup 3 +/ in LaCl/sub 3/, and an extension has permitted preliminary calculations of the spectra of other valence states.

  13. Cathodoluminescence spectra of gallium nitride nanorods.

    Science.gov (United States)

    Tsai, Chia-Chang; Li, Guan-Hua; Lin, Yuan-Ting; Chang, Ching-Wen; Wadekar, Paritosh; Chen, Quark Yung-Sung; Rigutti, Lorenzo; Tchernycheva, Maria; Julien, François Henri; Tu, Li-Wei

    2011-12-14

    Gallium nitride [GaN] nanorods grown on a Si(111) substrate at 720°C via plasma-assisted molecular beam epitaxy were studied by field-emission electron microscopy and cathodoluminescence [CL]. The surface topography and optical properties of the GaN nanorod cluster and single GaN nanorod were measured and discussed. The defect-related CL spectra of GaN nanorods and their dependence on temperature were investigated. The CL spectra along the length of the individual GaN nanorod were also studied. The results reveal that the 3.2-eV peak comes from the structural defect at the interface between the GaN nanorod and Si substrate. The surface state emission of the single GaN nanorod is stronger as the diameter of the GaN nanorod becomes smaller due to an increased surface-to-volume ratio.

  14. Broadband Eclipse Spectra of Exoplanets are Featureless

    CERN Document Server

    Hansen, C J; Cowan, N B

    2014-01-01

    Spectral retrieval methods leverage features in emission spectra to constrain the atmospheric composition and structure of transiting exoplanets. Most of the observed emission spectra consist of broadband photometric observations at a small number of wavelengths. We compare the Bayesian Information Criterion (BIC) of blackbody fits and spectral retrieval fits for all planets with eclipse measurements in multiple thermal wavebands, typically hot Jupiters with 2-4 observations. If the published error bars are taken at face value, then eight planets are significantly better fit by a spectral model than by a blackbody. In this under-constrained regime, however, photometric uncertainties directly impact one's ability to constrain atmospheric properties. By considering the handful of planets for which eclipse measurements have been repeated and/or reanalyzed, we obtain an empirical estimate of systematic uncertainties for broadband eclipse depths obtained with the Spitzer Space Telescope: sigma_sys = 5E-4. When thi...

  15. Curved Radio Spectra of Weak Cluster Shocks

    CERN Document Server

    Kang, Hyesung

    2015-01-01

    We explore a diffusive shock acceleration (DSA) model for radio relics in which a spherical shock impinges on a magnetized cloud of fossil relativistic electrons in the cluster periphery. Such a scenario could explain uniformity of the surface brightness and spectral curvature in the integrated spectra of thin arc-like radio relics. Toward this end, we perform DSA simulations of spherical shocks with the parameters relevant for the Sausage radio relic in cluster CIZA J2242.8+5301, and calculate the ensuing radio synchrotron emission from re-accelerated electrons. The surface brightness profile of radio-emitting postshock region and the volume-integrated radio spectrum are calculated as well. We find that the observed width of the Sausage relic can be explained reasonably well by shocks with speed $u_s \\sim 3,000 \\kms$ and sonic Mach number $M_s \\sim 3$. These shocks produce curved radio spectra that steepen gradually over $(0.1-10) \

  16. Control of photodetachment spectra through laser dressing

    Science.gov (United States)

    Morrison, Nathan; Greene, Chris

    2013-05-01

    Photodetachment and photoionization spectra often display rich resonance structures. The properties of these spectra can be modified through dressing with intense laser fields, providing control over photon absorption and the emitted electron. We present a Floquet R-matrix method for calculating photodetachment cross sections in the presence of a dressing laser. The full wave functions in the Floquet formalism for bound and escaping electrons are found by solving the Schrödinger equation near the atomic core and applying analytic boundary conditions outside of the interaction region. These calculations are used to investigate the modification of existing resonances, such as modifying the shape, or q parameter, of Feshbach resonances. We also investigate the creation of new resonances in cases where high-lying bound states become autoionizing through the absorption of dressing laser photons. This work was supported by the DOE.

  17. On the Algebraic Classification of Module Spectra

    CERN Document Server

    Patchkoria, Irakli

    2011-01-01

    Using methods developed by Franke, we obtain algebraic classification results for modules over certain symmetric ring spectra ($S$-algebras). In particular, for any symmetric ring spectrum $R$ whose graded homotopy ring $\\pi_*R$ has graded global homological dimension 2 and is concentrated in degrees divisible by some natural number $N \\geq 4$, we prove that the homotopy category of $R$-modules is equivalent to the derived category of the homotopy ring $\\pi_*R$. This improves the Bousfield-Wolbert algebraic classification of isomorphism classes of objects of the homotopy category of $R$-modules. The main examples of ring spectra to which our result applies are the $p$-local real connective $K$-theory spectrum $ko_{(p)}$, the Johnson-Wilson spectrum E(2), and the truncated Brown-Peterson spectrum $BP$, for an odd prime $p$.

  18. Absorption spectra of AA-stacked graphite

    Energy Technology Data Exchange (ETDEWEB)

    Chiu, C W; Lee, S H; Chen, S C; Lin, M F [Department of Physics, National Cheng Kung University, Taiwan (China); Shyu, F L, E-mail: fl.shyu@msa.hinet.ne, E-mail: mflin@mail.ncku.edu.t [Department of Physics, ROC Military Academy, 830 Kaohsiung, Taiwan (China)

    2010-08-15

    AA-stacked graphite shows strong anisotropy in geometric structures and velocity matrix elements. However, the absorption spectra are isotropic for the polarization vector on the graphene plane. The spectra exhibit one prominent plateau at middle energy and one shoulder structure at lower energy. These structures directly reflect the unique geometric and band structures and provide sufficient information for experimental fitting of the intralayer and interlayer atomic interactions. On the other hand, monolayer graphene shows a sharp absorption peak but no shoulder structure; AA-stacked bilayer graphene has two absorption peaks at middle energy and abruptly vanishes at lower energy. Furthermore, the isotropic features are expected to exist in other graphene-related systems. The calculated results and the predicted atomic interactions could be verified by optical measurements.

  19. RADLite: Raytracer for infrared line spectra

    Science.gov (United States)

    Pontoppidan, Klaus; Dullemond, Kees

    2013-08-01

    RADLite is a raytracer that is optimized for producing infrared line spectra and images from axisymmetric density structures, originally developed to function on top of the dust radiative transfer code RADMC. RADLite can consistently deal with a wide range of velocity gradients, such as those typical for the inner regions of protoplanetary disks. The code is intended as a back-end for chemical and excitation codes, and can rapidly produce spectra of thousands of lines for grids of models for comparison with observations. It includes functionality for simulating telescopic images for optical/IR/midIR/farIR telescopes. It takes advantage of multi-threaded CPUs and includes an escape-probability non-LTE module.

  20. Inflationary spectra in generalized gravity Unified forms

    CERN Document Server

    Noh, H

    2001-01-01

    The classical evolution and the quantum generation processes of the scalar- and tensor-type cosmological perturbations in the context of a broad class of generalized gravity theories are presented in unified forms. The exact forms of final spectra of the two types of structures generated during a generalized slow-roll inflation are derived. Results in generalized gravity are characterized by two additional parameters which are the coupling between gravity and field, and the nonminimal coupling in the kinetic part of the field. Our general results include widely studied gravity theories and inflation models as special cases, and show how the well known consistency relation and spectra in ordinary Einstein gravity inflation models are affected by the generalized nature of the gravity theories.

  1. Atomic and Molecular Aspects of Astronomical Spectra

    CERN Document Server

    Sochi, Taha

    2012-01-01

    In the first section we present the atomic part where a C2+ atomic target was prepared and used to generate theoretical data to investigate recombination lines arising from electron-ion collisions in thin plasma. R-matrix method was used to describe the C2+ plus electron system. Theoretical data concerning bound and autoionizing states were generated in the intermediate-coupling approximation. The data were used to generate dielectronic recombination data for C+ which include transition lines, oscillator strengths, radiative transition probabilities, emissivities and dielectronic recombination coefficients. The data were cast in a line list containing 6187 optically-allowed transitions which include many C II lines observed in astronomical spectra. This line list was used to analyze the spectra from a number of astronomical objects, mainly planetary nebulae, and identify their electron temperature. The electron temperature investigation was also extended to include free electron energy analysis to investigate...

  2. Dynamical analysis of highly excited molecular spectra

    Energy Technology Data Exchange (ETDEWEB)

    Kellman, M.E. [Univ. of Oregon, Eugene (United States)

    1993-12-01

    The goal of this program is new methods for analysis of spectra and dynamics of highly excited vibrational states of molecules. In these systems, strong mode coupling and anharmonicity give rise to complicated classical dynamics, and make the simple normal modes analysis unsatisfactory. New methods of spectral analysis, pattern recognition, and assignment are sought using techniques of nonlinear dynamics including bifurcation theory, phase space classification, and quantization of phase space structures. The emphasis is chaotic systems and systems with many degrees of freedom.

  3. Automation of the Analysis of Moessbauer Spectra

    Energy Technology Data Exchange (ETDEWEB)

    Souza, Paulo A. de Jr.; Garg, R.; Garg, V. K. [Universidade Federal do Espirito Santo, Departamento de Fisica (Brazil)

    1998-12-15

    In the present report we propose the automation of least square fitting of Moessbauer spectra, the identification of the substance, its crystal structure and the access to the references with the help of a genetic algorith, Fuzzy logic, and the artificial neural network associated with a databank of Moessbauer parameters and references. This system could be useful for specialists and non-specialists, in industry as well as in research laboratories.

  4. Directional Wave Spectra Using Normal Spreading Function

    Science.gov (United States)

    1985-03-01

    energy spectral density function U. g. Army Engineer Waternays Experiment Station. Coastal Engineering Research Center P. 0. lox 631, Vicksburg...Z39-18 D(f,e) = spreading function E (f,(3) = directional spectral density function f = frequency in cycles per second 8 = direction in radians...of this assumption depends on the narrow bandedness of the energy spectral density function . For fairly narrow spectra (e.g., a swell train), the

  5. Understanding the baryon and meson spectra

    Energy Technology Data Exchange (ETDEWEB)

    Pennington, Michael R. [JLAB

    2013-10-01

    A brief overview is given of what we know of the baryon and meson spectra, with a focus on what are the key internal degrees of freedom and how these relate to strong coupling QCD. The challenges, experimental, theoretical and phenomenological, for the future are outlined, with particular reference to a program at Jefferson Lab to extract hadronic states in which glue unambiguously contributes to their quantum numbers.

  6. Dose spectra from energetic particles and neutrons

    Science.gov (United States)

    Schwadron, Nathan; Bancroft, Chris; Bloser, Peter; Legere, Jason; Ryan, James; Smith, Sonya; Spence, Harlan; Mazur, Joe; Zeitlin, Cary

    2013-10-01

    spectra from energetic particles and neutrons (DoSEN) are an early-stage space technology research project that combines two advanced complementary radiation detection concepts with fundamental advantages over traditional dosimetry. DoSEN measures not only the energy but also the charge distribution (including neutrons) of energetic particles that affect human (and robotic) health in a way not presently possible with current dosimeters. For heavy ions and protons, DoSEN provides a direct measurement of the lineal energy transfer (LET) spectra behind shielding material. For LET measurements, DoSEN contains stacks of thin-thick Si detectors similar in design to those used for the Cosmic Ray Telescope for the Effects of Radiation. With LET spectra, we can now directly break down the observed spectrum of radiation into its constituent heavy-ion components and through biologically based quality factors that provide not only doses and dose rates but also dose equivalents, associated rates, and even organ doses. DoSEN also measures neutrons from 10 to 100 MeV, which requires enough sensitive mass to fully absorb recoil particles that the neutrons produce. DoSEN develops the new concept of combining these independent measurements and using the coincidence of LET measurements and neutron detection to significantly reduce backgrounds in each measurement. The background suppression through the use of coincidence allows for significant reductions in size, mass, and power needed to provide measurements of dose, neutron dose, dose equivalents, LET spectra, and organ doses. Thus, we introduce the DoSEN concept: a promising low-mass instrument that detects the full spectrum of energetic particles, heavy ions, and neutrons to determine biological impact of radiation in space.

  7. The Zeeman effect in stellar spectra

    Science.gov (United States)

    Romanyuk, I. I.

    A short biography of Pieter Zeeman is presented. The main formulae for the normal, anomalous, quadratic Zeeman effects and Paschen-Back effect are given. Instrumentation for Zeeman effect measurements in stellar spectra is described, the most important scientific achievements in magnetic stars investigations with the world's largest telescopes for 50 years are demonstrated. The devices for magnetic measurements made at SAO and the main results of stellar magnetic observations obtained with the 6 m telescope are described in detail.

  8. VARIABILITY IN OPTICAL SPECTRA OF {epsilon} ORIONIS

    Energy Technology Data Exchange (ETDEWEB)

    Thompson, Gregory B. [Department of Physics, Adrian College, Adrian, MI 49221 (United States); Morrison, Nancy D., E-mail: gthompson@adrian.edu, E-mail: nmorris@utnet.utoledo.edu [Ritter Astrophysical Research Center, Department of Physics and Astronomy, University of Toledo, 2801 W. Bancroft, Toledo, OH 43606 (United States)

    2013-04-15

    We present the results of a time series analysis of 130 echelle spectra of {epsilon} Ori (B0 Ia), acquired over seven observing seasons between 1998 and 2006 at Ritter Observatory. The equivalent widths of H{alpha} (net) and He I {lambda}5876 were measured and radial velocities were obtained from the central absorption of He I {lambda}5876. Temporal variance spectra (TVS) revealed significant wind variability in both H{alpha} and He I {lambda}5876. The He I TVS have a double-peaked profile consistent with radial velocity oscillations. A periodicity search was carried out on the equivalent width and radial velocity data, as well as on wavelength-binned spectra. This analysis has revealed several periods in the variability with timescales of two to seven days. Many of these periods exhibit sinusoidal modulation in the associated phase diagrams. Several of these periods were present in both H{alpha} and He I, indicating a possible connection between the wind and the photosphere. Due to the harmonic nature of these periods, stellar pulsations may be the origin of some of the observed variability. Periods on the order of the rotational period were also detected in the He I line in the 1998-1999 season and in both lines during the 2004-2005 season. These periods may indicate rotational modulation due to structure in the wind.

  9. Janus spectra in two-dimensional flows

    CERN Document Server

    Liu, Chien-Chia; Chakraborty, Pinaki

    2016-01-01

    In theory, large-scale atmospheric flows, soap-film flows and other two-dimensional flows may host two distinct types of turbulent energy spectra---in one, $\\alpha$, the spectral exponent of velocity fluctuations, equals $3$ and the fluctuations are dissipated at the small scales, and in the other, $\\alpha=5/3$ and the fluctuations are dissipated at the large scales---but measurements downstream of obstacles have invariably revealed $\\alpha = 3$. Here we report experiments on soap-film flows where downstream of obstacles there exists a sizable interval in which $\\alpha$ has transitioned from $3$ to $5/3$ for the streamwise fluctuations but remains equal to $3$ for the transverse fluctuations, as if two mutually independent turbulent fields of disparate dynamics were concurrently active within the flow. This species of turbulent energy spectra, which we term the Janus spectra, has never been observed or predicted theoretically. Our results may open up new vistas in the study of turbulence and geophysical flows...

  10. The Transit Spectra of Earth and Jupiter

    CERN Document Server

    Irwin, Patrick G J; Bowles, Neil E; Fletcher, Leigh N; Aigrain, Suzanne; Lee, Jae-Min

    2014-01-01

    In recent years, a number of observations have been made of the transits of 'Hot Jupiters', such as HD 189733b, which have been modelled to derive atmospheric structure and composition. As measurement techniques improve, the transit spectra of 'Super-Earths' such as GJ 1214b are becoming better constrained, allowing model atmospheres to be fitted for this class of planet also. While it is not yet possible to constrain the atmospheric states of small planets such as the Earth or cold planets like Jupiter, this may become practical in the coming decades and if so, it is of interest to determine what we might infer from such measurements. Here we have constructed atmospheric models of the Solar System planets from 0.4 - 15.5 microns that are consistent with ground-based and satellite observations and from these calculate the primary transit and secondary eclipse spectra (with respect to the Sun and typical M-dwarfs) that would be observed by a 'remote observer', many light years away. From these spectra we test ...

  11. Analysis of COSIMA spectra: Bayesian approach

    Directory of Open Access Journals (Sweden)

    H. J. Lehto

    2014-11-01

    Full Text Available We describe the use of Bayesian analysis methods applied to TOF-SIMS spectra. The method finds the probability density functions of measured line parameters (number of lines, and their widths, peak amplitudes, integrated amplitudes, positions in mass intervals over the whole spectrum. We discuss the results we can expect from this analysis. We discuss the effects the instrument dead time causes in the COSIMA TOF SIMS. We address this issue in a new way. The derived line parameters can be used to further calibrate the mass scaling of TOF-SIMS and to feed the results into other analysis methods such as multivariate analyses of spectra. We intend to use the method in two ways, first as a comprehensive tool to perform quantitative analysis of spectra, and second as a fast tool for studying interesting targets for obtaining additional TOF-SIMS measurements of the sample, a property unique for COSIMA. Finally, we point out that the Bayesian method can be thought as a means to solve inverse problems but with forward calculations only.

  12. Magnetic Energy Spectra in Active Regions

    CERN Document Server

    Abramenko, Valentyna

    2010-01-01

    Line-of-sight magnetograms for 217 active regions (ARs) of different flare rate observed at the solar disk center from January 1997 until December 2006 are utilized to study the turbulence regime and its relationship to the flare productivity. Data from {\\it SOHO}/MDI instrument recorded in the high resolution mode and data from the BBSO magnetograph were used. The turbulence regime was probed via magnetic energy spectra and magnetic dissipation spectra. We found steeper energy spectra for ARs of higher flare productivity. We also report that both the power index, $\\alpha$, of the energy spectrum, $E(k) \\sim k^{-\\alpha}$, and the total spectral energy $W=\\int E(k)dk$ are comparably correlated with the flare index, $A$, of an active region. The correlations are found to be stronger than that found between the flare index and total unsigned flux. The flare index for an AR can be estimated based on measurements of $\\alpha$ and $W$ as $A=10^b (\\alpha W)^c$, with $b=-7.92 \\pm 0.58$ and $c=1.85 \\pm 0.13$. We found ...

  13. Soil emissivity and reflectance spectra measurements

    Energy Technology Data Exchange (ETDEWEB)

    Sobrino, Jose A.; Mattar, Cristian; Pardo, Pablo; Jimenez-Munoz, Juan C.; Hook, Simon J.; Baldridge, Alice; Ibanez, Rafael

    2009-07-01

    We present an analysis of the laboratory reflectance and emissivity spectra of 11 soil samples collected on different field campaigns carried out over a diverse suite of test sites in Europe, North Africa, and South America from 2002 to 2008. Hemispherical reflectance spectra were measured from 2.0 to 14 {mu}m with a Fourier transform infrared spectrometer, and x-ray diffraction analysis (XRD) was used to determine the mineralogical phases of the soil samples. Emissivity spectra were obtained from the hemispherical reflectance measurements using Kirchhoff's law and compared with in situ radiance measurements obtained with a CIMEL Electronique CE312-2 thermal radiometer and converted to emissivity using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) temperature and emissivity separation algorithm. The CIMEL has five narrow bands at approximately the same positions as the ASTER. Results show a root mean square error typically below 0.015 between laboratory emissivity measurements and emissivity measurements derived from the field radiometer.

  14. Computing High Accuracy Power Spectra with Pico

    CERN Document Server

    Fendt, William A

    2007-01-01

    This paper presents the second release of Pico (Parameters for the Impatient COsmologist). Pico is a general purpose machine learning code which we have applied to computing the CMB power spectra and the WMAP likelihood. For this release, we have made improvements to the algorithm as well as the data sets used to train Pico, leading to a significant improvement in accuracy. For the 9 parameter nonflat case presented here Pico can on average compute the TT, TE and EE spectra to better than 1% of cosmic standard deviation for nearly all $\\ell$ values over a large region of parameter space. Performing a cosmological parameter analysis of current CMB and large scale structure data, we show that these power spectra give very accurate 1 and 2 dimensional parameter posteriors. We have extended Pico to allow computation of the tensor power spectrum and the matter transfer function. Pico runs about 1500 times faster than CAMB at the default accuracy and about 250,000 times faster at high accuracy. Training Pico can be...

  15. Facts and Artifacts in Interstellar Diamond Spectra

    Science.gov (United States)

    Mutschke, H.; Dorschner, J.; Henning, T.; Jager, C.; Ott, U.

    1995-12-01

    Absorption spectra of presolar diamonds extracted from the Murchison meteorite have been measured in the extended wavelength range 0.2--500 mu m in order to make available optical properties of this supposed component of interstellar carbon dust. In contrast to terrestrial natural and synthetic diamonds, spectra of the meteoritic diamonds show prominent bands in the middle-IR. In this Letter, experimental evidence is presented that the OH band at 3200 cm-1 and the CH bands in the 2800--3000 cm-1 range are not intrinsic features of the diamonds and that the band at 1100 cm-1 contains an artificial component due to the extraction procedure. In addition, in our spectra a conspicuous band at 120 cm-1 was found. If the intrinsic character of this band, which, up to now, is unidentified, is confirmed, it would offer a chance to observe interstellar diamonds, e.g., by the ISO satellite. We encourage laboratory astrophysicists and observers to study this promising possibility.

  16. Tunneling spectra of graphene on copper unraveled.

    Science.gov (United States)

    Zhang, Xin; Stradi, Daniele; Liu, Lei; Luo, Hong; Brandbyge, Mads; Gu, Gong

    2016-06-22

    Scanning tunneling spectroscopy is often employed to study two-dimensional (2D) materials on conductive growth substrates, in order to gain information on the electronic structures of the 2D material-substrate systems, which can lead to insight into 2D material-substrate interactions, growth mechanisms, etc. The interpretation of the spectra can be complicated, however. Specifically for graphene grown on copper, there have been conflicting reports of tunneling spectra. A clear understanding of the mechanisms behind the variability is desired. In this work, we have revealed that the root cause of the variability in tunneling spectra is the variation in graphene-substrate coupling under various experimental conditions, providing a salutary perspective on the important role of 2D material-substrate interactions. The conclusions are drawn from measured data and theoretical calculations for monolayer, AB-stacked bilayer, and twisted bilayer graphene coexisting on the same substrates in areas with and without intercalated oxygen, demonstrating a high degree of consistency. The Van Hove singularities of the twisted graphene unambiguously indicate the Dirac energy between them, lending strong evidence to our assignment of the spectral features. In addition, we have discovered an O-Cu superstructure that has never been observed before.

  17. Optical spectra analysis for breast cancer diagnostics

    Science.gov (United States)

    Belkov, S. A.; Kochemasov, G. G.; Lyubynskaya, T. E.; Maslov, N. V.; Nuzhny, A. S.; da Silva, L. B.; Rubenchik, A.

    2011-11-01

    Minimally invasive probe and optical biopsy system based on optical spectra recording and analysis seem to be a promising tool for early diagnostics of breast cancer. Light scattering and absorption spectra are generated continuously as far as the needle-like probe with one emitting and several collecting optical fibers penetrates through the tissues toward to the suspicious area. That allows analyzing not only the state of local site, but also the structure of tissues along the needle trace. The suggested method has the advantages of automated on-line diagnosing and minimal tissue destruction and in parallel with the conventional diagnostic procedures provides the ground for decision-making. 165 medical trials were completed in Nizhny Novgorod Regional Oncology Centre, Russia. Independent diagnoses were the results of fine biopsy and histology. Application of wavelet expansion and clasterization techniques for spectra analysis revealed several main spectral types for malignant and benign tumors. Automatic classification algorithm demonstrated specificity ˜90% and sensitivity ˜91%. Large amount of information, fuzziness in criteria and data noisiness make neural networks to be an attractive analytic tool. The model based on three-layer perceptron was tested over the sample of 29 `cancer' and 29 `non-cancer' cases and demonstrated total separation.

  18. Stellar parametrization from Gaia RVS spectra

    CERN Document Server

    Recio-Blanco, A; Prieto, C Allende; Fustes, D; Manteiga, M; Arcay, B; Bijaoui, A; Dafonte, C; Ordenovic, C; Blanco, D Ordoñez

    2016-01-01

    Among the myriad of data collected by the ESA Gaia satellite, about 150 million spectra will be delivered by the Radial Velocity Spectrometer (RVS) for stars as faint as G_RVS~16. A specific stellar parametrization will be performed for most of these RVS spectra. Some individual chemical abundances will also be estimated for the brightest targets. We describe the different parametrization codes that have been specifically developed or adapted for RVS spectra within the GSP-spec working group of the analysis consortium. The tested codes are based on optimization (FERRE and GAUGUIN), projection (MATISSE) or pattern recognition methods (Artificial Neural Networks). We present and discuss their expected performances in the recovered stellar atmospheric parameters (Teff, log(g), [M/H]) for B- to K- type stars. The performances for the determinations of [alpha/Fe] ratios are also presented for cool stars. For all the considered stellar types, stars brighter than G_RVS~12.5 will be very efficiently parametrized by t...

  19. Infrared Transmission Spectra for Extrasolar Giant Planets

    CERN Document Server

    Tinetti, G; Vidal-Madjar, A; Ehrenreich, D; Etangs, A L; Yung, Y

    2006-01-01

    Among the hot Jupiters that transit their parent stars known to date, the two best candidates to be observed with transmission spectroscopy in the mid-infrared (MIR) are HD189733b and HD209458b, due to their combined characteristics of planetary density, orbital parameters and parent star distance and brightness. Here we simulate transmission spectra of these two planets during their primary eclipse in the MIR, and we present sensitivity studies of the spectra to the changes of atmospheric thermal properties, molecular abundances and C/O ratios. Our model predicts that the dominant species absorbing in the MIR on hot Jupiters are water vapor and carbon monoxide, and their relative abundances are determined by the C/O ratio. Since the temperature profile plays a secondary role in the transmission spectra of hot Jupiters compared to molecular abundances, future primary eclipse observations in the MIR of those objects might give an insight on EGP atmospheric chemistry. We find here that the absorption features c...

  20. Central nervous system abnormalities in patients with oculo-auriculo-vertebral spectrum (Goldenhar syndrome Anormalidades do sistema nervoso central em pacientes com espectro óculo-aurículo-vertebral (síndrome de Goldenhar

    Directory of Open Access Journals (Sweden)

    Rafael Fabiano Machado Rosa

    2010-02-01

    Full Text Available OBJECTIVE: To describe the central nervous system (CNS alterations present in a sample of oculo-auriculo-vertebral spectrum (OAVS patients, trying to correlate them with other clinical features. METHOD: Seventeen patients with diagnosis of OAVS were evaluated. All presented radiological evaluation of the CNS, normal GTG-Banding karyotype and clinical features involving at least two from the four following areas: oro-cranio-facial, ocular, auricular and vertebral. RESULTS: CNS alterations were verified in eight from seventeen patients (47%. Diffuse cerebral hypoplasia, dilated lateral cerebral ventricles (asymptomatic hydrocephalus, corpus callosum dysgenesis and frontal hypodensities were the most frequent abnormalities. Presence of ophthalmologic abnormalities was the only clinical association observed, being significantly more frequent among patients with cerebral alterations (63% versus 11%. CONCLUSION: CNS abnormalities are frequent in patients with OAVS, especially in carriers of ophthalmologic alterations. However, the absence of detectable cerebral abnormalities did not exclude the possibility that these subjects will subsequently present neurological symptoms.OBJETIVO: Descrever as alterações do sistema nervoso central (SNC presentes em uma amostra de pacientes com espectro óculo-aurículo-vertebral (EOAV, tentando correlacioná-las com os demais achados clínicos. MÉTODO: Foram avaliados dezessete pacientes com diagnóstico de EOAV. Todos apresentavam avaliação radiológica do SNC, cariótipo por bandas GTG normal e achados clínicos em pelo menos duas das quatro das seguintes áreas: oro-crânio-facial, ocular, auricular e vertebral. RESULTADOS: Alterações do SNC foram verificadas em oito dos dezessete pacientes (47%. Hipoplasia cerebral difusa, dilatação dos ventrículos cerebrais laterais (hidrocefalia assintomática, disgenesia do corpo caloso e hipondesidades frontais foram as anormalidades mais frequentes. A presença de

  1. Métodos alternativos para detecção de betalactamase de espectro estendido em Escherichia coli e Klebsiella pneumoniae Alternative methods for the detection of extended-spectrum-beta-lactamase in Escherichia coli and Klebsiella pneumoniae

    Directory of Open Access Journals (Sweden)

    Alexsander Costa Martins

    2011-08-01

    Full Text Available INTRODUÇÃO: A resistência a antimicrobianos tem aumentado rapidamente nos últimos anos no Brasil e no mundo e, embora exista uma variedade de mecanismos de resistência, destaca-se a produção de betalactamase de espectro estendido (ESBL como um dos principais. Essas enzimas são mediadas por plasmídios, conferem resistência a vários antimicrobianos betalactâmicos e são inibidas por compostos, como ácido clavulânico, sulbactam e tazobactam. OBJETIVO: O objetivo deste estudo foi comparar metodologias alternativas à técnica padrão preconizada pelo Clinical and Laboratory Standards Institute (CLSI para detecção de ESBL. MATERIAL E MÉTODO: Foram realizados testes com 36 isolados (26 de E. coli e 10 de K. pneumoniae mediante disco combinado (CLSI e técnicas alternativas designadas meio disco (MD e substituição de discos (SD. CONCLUSÃO: As duas metodologias propostas apresentaram resultados satisfatórios com sensibilidade superior a 90% e custo inferior à técnica de referência (disco combinado, podendo ser utilizadas na pesquisa de ESBL.INTRODUCTION: Antimicrobial resistance has increased apace in Brazil and worldwide in the last years, even though there is a great variety of resistance mechanisms and extended spectrum beta-lactamases (ESBL is among the main ones. These enzymes are plasmid mediated, which causes resistance to some beta-lactam antimicrobials and are inhibited by compounds such as clavulanic acid, sulbactam and tazobactam. OBJECTIVE: The objective of this study was to compare alternative methods to the standard ESBL detection technique recommended by the Clinical and Laboratory Standards Institute (CLSI. MATERIAL AND METHOD: Tests with 36 isolates (26 E. coli and 10 K. pneumoniae were performed by means of CLSI disk diffusion method and alternative techniques designated as half disk (HD and disk substitution (SD. CONCLUSION: Both methods yielded satisfactory results with higher sensitivity (90% and lower costs

  2. A Eficácia de um Programa de Treino de Trampolins na Proficiência Motora de Crianças com Transtorno do Espectro do Autismo1

    Directory of Open Access Journals (Sweden)

    Carla Cristina Vieira LOURENÇO

    2016-03-01

    Full Text Available RESUMO: crianças com transtorno do espectro do autismo (TEA apresentam um desempenho motor inferior às crianças em geral. Com este estudo pretende-se avaliar a eficácia de um programa de treino de trampolins, com a duração de 20 semanas, na proficiência motora e índice de massa corporal (IMC de crianças com TEA. Participaram um total de 17 crianças (entre os 4 e os 10 anos de idade com diagnóstico de TEA, que foram distribuídas por dois grupos: grupo experimental (n=6, e controlo (n=11. O grupo experimental foi submetido a uma sessão de treino de trampolins por semana com uma duração de 45 minutos. O grupo de controlo compreende crianças cuja atividade física foi limitada ao currículo obrigatório. A proficiência motora foi avaliada através da bateria de testes Bruininks - Oseretsky. O IMC foi calculado recorrendo à fórmula internacionalmente referenciada. Para análise de variância de medidas repetidas (ANOVA. Ambos os grupos apresentaram características idênticas na avaliação inicial. No que se refere à proficiência motora foram evidentes e significativas as melhorias no GE após o programa de trampolins de 20 semanas (p0.05. Relativamente ao IMC não se registraram alterações significativas em ambos os grupos com a realização do programa de trampolins (p>0.05. Em face deste quadro de resultados é possível concluir que a participação em um programa de trampolins com a duração de 20 semanas contribuiu para melhorar significativamente a proficiência motora de crianças com TEA.

  3. Espectro polínico de amostras de mel de Apis mellifera L., coletadas na Bahia Pollen spectrum of samples of Apis mellifera L., honey collected in Bahia State, Brazil

    Directory of Open Access Journals (Sweden)

    AUGUSTA CAROLINA DE CAMARGO CARMELLO MORETI

    2000-01-01

    Full Text Available O espectro polínico encontrado em amostras de mel provenientes de seis municípios do Estado da Bahia foi analisado com o objetivo de contribuir para o conhecimento da flora visitada por Apis mellifera L. 1758 (Hymenoptera: ApidaeA identificação dos tipos polínicos foi feita por meio de literatura especializada e de informações de campo. Foram encontrados 43 tipos de pólen, sendo consideradas como dominantes as espécies Eucalyptus sp. (Myrtaceae, Mimosa verrucosa Benth. (Mimosaceae, M. scabrella Benth. (Mimosaceae e Bauhinia sp. (Caesalpiniaceae. Os tipos acessórios foram Alternanthera ficoidea R.Br. (Amaranthaceae, tipo Compositae (Asteraceae e Cecropia sp. (Moraceae. Destacou-se a participação de Mimosa sp. (Mimosaceae e de outras espécies silvestres na composição dos méis nos municípios considerados, registrando-se ainda a espécie Eucalyptus sp. (Myrtaceae como uma das principais fontes de alimento das abelhas dessa região.Pollen spectrum found in honey samples from six localities of Bahia State, Brazil, was analyzed with the objective to contribute for the knowledge of the plants used by Apis mellifera L., 1758 (Hymenoptera: Apidae. The identification of the pollen types was made by specialized literature and by field information. Two hundred pollen grains were studied in order to determine the percentage and the occurrence of each type. Forty three pollen types were identified, being considered as the predominant types Eucalyptus sp. (Myrtaceae, Mimosa verrucosa Benth. (Mimosaceae, M. scabrella Benth. (Mimosaceae and Bauhinia sp. (Caesalpiniaceae. The accessory pollen types were Alternanthera ficoidea R.Br. (Amaranthaceae, Compositae type (Asteraceae and Cecropia sp. (Moraceae. It is intense the participation of Mimosa sp. (Mimosaceae and other wild species in the honey composition of the six localities considered. Eucalyptus sp. (Myrtaceae is one of the dominant sources of bee food in some regions of Bahia State.

  4. Efficient estimation of burst-mode LDA power spectra

    DEFF Research Database (Denmark)

    Velte, Clara Marika; George, William K

    2010-01-01

    requirements for good statistical convergence due to the random sampling of the data. In the present work, the theory for estimating burst-mode LDA spectra using residence time weighting is discussed and a practical estimator is derived and applied. A brief discussion on the self-noise in spectra...... (axisymmetric turbulent jet). The burst-mode LDA spectra are compared to corresponding spectra from hot-wire data obtained in the same experiments, and to LDA spectra produced by the sample-and-hold methodology. The spectra computed from the residence-time weighted burst-mode algorithm proposed herein compare...

  5. EMPCA and Cluster Analysis of Quasar Spectra: Application to SDSS Spectra

    Science.gov (United States)

    Leighly, Karen; Marrs, Adam; Wagner, Cassidy; Macinnis, Francis

    2017-01-01

    Accurate modeling of the quasar continuum is necessary to measure and analyze absorption lines. But quasar continua, in particular the emission lines, vary from object to object. Patterns in the variations allow a spectral principal component analysis (SPCA) approach using large samples of quasar spectra, e.g., from the SDSS. Then, a small number of the derived principal component spectra can be used to reconstruct an arbitrary quasar's continuum.A problem with this approach is that the number of principal components required to model an arbitrary quasar, usually 8 to 20 in the literature, is large. One reason why so many components are required is that SPCA implicitly assumes that spectra bins are independent. Quasar emission lines are spread over a range of spectral bins, and more importantly, can sometimes be blueshifted. So while the intrinsic variability may only be a function of a few physical parameters, the nonlinearity inherent in the variations from object to object requires a large number of prinicipal components to accurately model a quasar continuum.We present a modified approach. We perform a SPCA analysis, using an expectation-maximization algorithm by Bailey et al. 2012, which takes into account uncertainties and missing data. We project the sample spectra on the resulting eignevectors to obtain the projection coefficients. Reasoning that intriniscally similar spectra will have similar projection coefficients, we perform a cluster analysis on the projection coefficients. The results are used to divide the sample into groups of similar spectra. A second PCA analysis is then performed on each group. We find that many fewer eigenspectra are required to accurately model the spectra in each group. We apply this approach to several samples of quasars from the SDSS.

  6. Estudo teórico e experimental de espectros infravermelho de ésteres de ácido graxo presentes na composição do biodiesel de soja

    Directory of Open Access Journals (Sweden)

    Eduardo W. Castilho-Almeida

    2012-01-01

    Full Text Available In this work, theoretical and experimental infrared spectra of fatty acid methyl esters (FAME contained in soybean biodiesel were analyzed seeking the assignments of the relevant vibrational modes to characterize crude soybean oil and soybean biodiesel. The results showed the usefulness of infrared spectra for monitoring saturated and unsaturated compounds as well as impurities (mainly glycerol in raw samples. This is the first step toward proposing an efficient molecular spectroscopy routine to certify biodiesel fuel.

  7. Synthetic ionizing spectra for planetary nebulae: a new grid of metal-line blanketed nlte model atmospheres

    OpenAIRE

    T. Rauch

    2002-01-01

    Presentamos una tabla de ujos de atm osferas estelares basadas en modelos de atm osferas \\Fuera de Equilibrio Termodin amico Local" (NLTE) que consideran el encubrimiento por l neas met alicas de todos los elementos desde el hidr ogeno al grupo del hierro. El uso de estos ujos como espectros de ionizaci on es altamente recomendado para an alisis nebulares con ables.

  8. Atomic and Molecular Aspects of Astronomical Spectra

    Science.gov (United States)

    Sochi, Taha

    2012-11-01

    In the first section we present the atomic part where a C2+ atomic target was prepared and used to generate theoretical data to investigate recombination lines arising from electron-ion collisions in thin plasma. R-matrix method was used to describe the C2+ plus electron system. Theoretical data concerning bound and autoionizing states were generated in the intermediate-coupling approximation. The data were used to generate dielectronic recombination data for C+ which include transition lines, oscillator strengths, radiative transition probabilities, emissivities and dielectronic recombination coefficients. The data were cast in a line list containing 6187 optically-allowed transitions which include many C II lines observed in astronomical spectra. This line list was used to analyze the spectra from a number of astronomical objects, mainly planetary nebulae, and identify their electron temperature. The electron temperature investigation was also extended to include free electron energy analysis to investigate the long-standing problem of discrepancy between the results of recombination and forbidden lines analysis and its possible connection to the electron distribution. In the second section we present the results of our molecular investigation; the generation of a comprehensive, calculated line list of frequencies and transition probabilities for H2D+. The line list contains over 22 million rotational-vibrational transitions occurring between more than 33 thousand energy levels and covers frequencies up to 18500 cm-1. About 15% of these levels are fully assigned with approximate rotational and vibrational quantum numbers. A temperature-dependent partition function and cooling function are presented. Temperature-dependent synthetic spectra for the temperatures T=100, 500, 1000 and 2000 K in the frequency range 0-10000 cm-1 were also generated and presented graphically.

  9. Optical Spectra and Color of Silver Colloids

    Directory of Open Access Journals (Sweden)

    N.L. Dmitruk

    2013-10-01

    Full Text Available In present work, the color features of the aqueous silver suspensions were investigated. Color systems CIE XYZ and CIELAB are considered. In the case of low concentrations of nanoparticles chromaticity coordinates were determined from the transmission spectra of the colloids. For high concentrations of nanoparticles, when the multiple scattering effects play a key role and the medium turns to be turbid, the color of nanoparticles was found using the Kubelka-Munk relation. Experimental data is compared with that calculated from the Mie theory. Color features of a planar array of non-interacting silver nanoparticles are discussed for the first time.

  10. The spectra and dynamics of diatomic molecules

    CERN Document Server

    Lefebvre-Brion, Helene

    2004-01-01

    This book is written for graduate students just beginning research, for theorists curious about what experimentalists actually can and do measure, and for experimentalists bewildered by theory. It is a guide for potential users of spectroscopic data, and uses language and concepts that bridge the frequency-and time-domain spectroscopic communities. Key topics, concepts, and techniques include: the assignment of simple spectra, basic experimental techniques, definition of Born-Oppenheimer and angular momentum basis sets and the associated spectroscopic energy level patterns (Hund's ca

  11. Techniques for classifying acoustic resonant spectra

    Energy Technology Data Exchange (ETDEWEB)

    Roberts, R.S.; Lewis, P.S.; Chen, J.T.; Vela, O.A.

    1995-12-31

    A second-generation nondestructive evaluation (NDE) system that discriminates between different types of chemical munitions is under development. The NDE system extracts features from the acoustic spectra of known munitions, builds templates from these features, and performs classification by comparing features extracted from an unknown munition to a template library. Improvements over first-generation feature extraction template construction and classification algorithms are reported. Results are presented on the performance of the system and a large data set collected from surrogate-filled munitions.

  12. Spaces of orderings and abstract real spectra

    CERN Document Server

    Marshall, Murray A

    1996-01-01

    This book is of interest to students as well as experts in the area of real algebraic geometry, quadratic forms, orderings, valuations, lattice ordered groups and rings, and in model theory. The original motivation comes from orderings on fields and commutative rings. This is explained as is the important application to minimal generation of semi-algebraic sets. Many results in the new theory of abstract real spectra (also called spaces of signs) appear here for the first time. The reader needs elementary knowledge of commutative rings, ordered fields and real closed fields and valuations.

  13. Statistical properties of quantum spectra in nuclei

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Some aspects of quantum chaos in a finite system have been studied based on the analysis of statistical behavior of quantum spectra in nuclei.The experiment data show the transition from order to chaos with increasing excitation energy in spherical nuclei.The dependence of the order to chaos transition on nuclear deformation and nuclear rotating is described.The influence of pairing effect on the order to chaos transition is also discussed.Some important experiment phenomena in nuclear physics have been understood from the point of view of the interplay between order and chaos.

  14. Symmetry in bonding and spectra an introduction

    CERN Document Server

    Douglas, Bodie E

    1985-01-01

    Many courses dealing with the material in this text are called ""Applications of Group Theory."" Emphasizing the central role and primary importance of symmetry in the applications, Symmetry in Bonding and Spectra enables students to handle applications, particularly applications to chemical bonding and spectroscopy. It contains the essential background in vectors and matrices for the applications, along with concise reviews of simple molecular orbital theory, ligand field theory, and treatments of molecular shapes, as well as some quantum mechanics. Solved examples in the text illustra

  15. Boundary layer heights derived from velocity spectra

    Energy Technology Data Exchange (ETDEWEB)

    Hoejstrup, J.; Barthelmie, R.J. [Risoe National Lab., Roskilde (Denmark); Kaellstrand, B. [Univ. of Uppsala, Uppsala (Sweden)

    1997-10-01

    It is a well-known fact that the height of the mixed layer determines the size of the largest and most energetic eddies that can be observed in the unstable boundary layer, and consequently a peak can be observed in the power spectra of the along-wind velocity component at scales comparable to the mixed layer depth. We will now show how the mixed layer depth can be derived from the u-specta and the results will be compared with direct measurements using pibal and tethersonde measurements. (au)

  16. Algebraic Hamiltonian for Vibrational Spectra of Stibine

    Institute of Scientific and Technical Information of China (English)

    HOU Xi-Wen

    2004-01-01

    @@ An algebraic Hamiltonian, which in a limit can be reduced to an extended local mode model by Law and Duncan,is proposed to describe both stretching and bending vibrational energy levels of polyatomic molecules, where Fermi resonances between the stretches and the bends are considered. The Hamiltonian is used to study the vibrational spectra of stibine (SbH3). A comparison with the extended local mode model is made. Results of fitting the experimental data show that the algebraic Hamiltonian reproduces the observed values better than the extended local mode model.

  17. Systematics of Identified Hadron Spectra at PHENIX

    CERN Document Server

    Csanad, M

    2006-01-01

    Mid-rapidity transverse momentum distributions for $\\pi^\\pm$, $K^\\pm$, p and $\\pbar$ are measured by the PHENIX experiment at RHIC in Au+Au, d+Au and p+p collisions at \\ssnn=200GeV up to ~2--4GeV. Also particle ratios of $\\pi^{-}/\\pi^{+}$, $K^{-}/K^{+}$, $\\pbar/p$, $p/\\pi$ and $\\pbar/\\pi$ are measured, as well as the nuclear modification factor, all as a function of \\pt and in every of the above collision systems. Finally, the measured p+p and Au+Au spectra are compared to the Buda-Lund hydro model.

  18. The Hilbert transform: Applications to atomic spectra

    CERN Document Server

    Whittaker, K A; Hughes, I G; Adams, C S

    2014-01-01

    In many areas of physics, the Kramers-Kronig (KK) relations are used to extract information about the real part of the optical response of a medium from its imaginary counterpart. In this paper we discuss an alternative but mathematically equivalent approach based on the Hilbert transform. We apply the Hilbert transform to transmission spectra to find the group and refractive indices of a Cs vapor, and thereby demonstrate how the Hilbert transform allows indirect measurement of the refractive index, group index and group delay whilst avoiding the use of complicated experimental set ups.

  19. OPTICAL SPECTRA OF LOW-DIMENSIONAL SEMICONDUCTORS

    Institute of Scientific and Technical Information of China (English)

    Fu Y Chiragwandi Z; G(o..)thberg P; Willander M

    2003-01-01

    We have studied the optical spectra of low-dimensional semiconductor systems by calculating all possible optical transitions between electronic states. Optical absorption and emission have been obtained under different carrier population conditions and in different photon wavelengths. The line-shapes of the peaks in the optical spectrum are determined by the density of electronic states of the system, and the symmetries and intensities of these peaks can be improved by reducing the dimensionality of the system. Optical gain requires in general a population inversion, whereas for a quantum-dot system, there exists a threshold value of the population inversion.

  20. QCD-inspired spectra from Blue's functions

    CERN Document Server

    Nowak, M A; Zahed, I; Nowak, Maciej A; Papp, Gabor; Zahed, Ismail

    1996-01-01

    We use the law of addition in random matrix theory to analyze the spectral distributions of a variety of chiral random matrix models as inspired from QCD whether through symmetries or models. In terms of the Blue's functions recently discussed by Zee, we show that most of the spectral distributions in the macroscopic limit and the quenched approximation, follow algebraically from the discontinuity of a pertinent solution to a cubic (Cardano) or a quartic (Ferrari) equation. We use the end-point equation of the energy spectra in chiral random matrix models to argue for novel phase structures, in which the Dirac density of states plays the role of an order parameter.

  1. QCD-inspired spectra from Blue's functions

    Science.gov (United States)

    Nowak, Maciej A.; Papp, Gábor; Zahed, Ismail

    1996-02-01

    We use the law of addition in random matrix theory to analyze the spectral distributions of a variety of chiral random matrix models as inspired from QCD whether through symmetries or models. In terms of the Blue's functions recently discussed by Zee, we show that most of the spectral distributions in the macroscopic limit and the quenched approximation, follow algebraically from the discontinuity of a pertinent solution to a cubic (Cardano) or a quartic (Ferrari) equation. We use the end-point equation of the energy spectra in chiral random matrix models to argue for novel phase structures, in which the Dirac density of states plays the role of an order parameter.

  2. Evaluation of secondary and prompt fission neutron spectra

    Energy Technology Data Exchange (ETDEWEB)

    Porodzinskij, Yu.V.; Sukhovitskij, E.Sh. [Radiation Physics and Chemistry Problems Inst., Minsk-Sosny (Belarus)

    1997-03-01

    A simple model allowing to split neutron emission spectra into reaction partials is suggested. Predicted spectra of (n,n`{gamma}), (n,n`f), etc appear to be much harder than usually evaluated. (author)

  3. Photon and photoneutron spectra produced in radiotherapy Linacs

    Energy Technology Data Exchange (ETDEWEB)

    Vega C, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Estudios Nucleares, Calle Cipres No. 10, Fracc. La Penuela, 98068 Zacatecas (Mexico); Martinez O, S. A. [Universidad Pedagogica y Tecnologica de Colombia, Grupo de Fisica Nuclear Aplicada y Simulacion, Av. Central del Norte Km. 1, Via Paipa Tunja, Boyaca (Colombia); Benites R, J. L. [Universidad Autonoma de Nayarit, Postgrado CBAP, Carretera Tepic Compostela Km. 9, Xalisco, Nayarit (Mexico); Lallena, A. M., E-mail: fermineutron@yahoo.com [Universida de Granada, Departamento de Fisica Atomica, Molecular y Nuclear, E-18071 Granada (Spain)

    2011-10-15

    A Monte Carlo calculation, using the MCNPX code, was carried out in order to estimate the photon and neutron spectra in two locations of two linacs operating at 15 and 18 MV. Detailed models of both linac heads were used in the calculations. Spectra were estimated below the flattening filter and at the isocenter. Neutron spectra show two components due to evaporation and knock-on neutrons. Lethargy spectra under the filter were compared to the spectra calculated from the function quoted by Tosi et al. that describes reasonably well neutron spectra beyond 1 MeV, though tends to underestimate the energy region between 10{sup -6} and 1 MeV. Neutron and Bremsstrahlung spectra show the same features regardless of the linac voltage. The amount of photons and neutrons produced by the 15 MV linac is smaller than that found for the 18 MV linac. As expected, Bremsstrahlung spectra ends according to the voltage used to accelerate the electrons. (Author)

  4. Method for analysis of low energy backscattering spectra

    Energy Technology Data Exchange (ETDEWEB)

    Hnatowicz, V.; Kvitek, J. (Ceskoslovenska Akademie Ved, Rez. Ustav Jaderne Fyziky); Pelikan, L. (Ceske Vysoke Uceni Technicke, Prague (Czechoslavika). Dept. of Microelectronics); Rybka, V.; Krejci, P. (Tesla, Prague (Czechoslovakia))

    1982-04-15

    An analytical formula is proposed describing the shape of the energy spectra of particles backscattered from samples implanted with heavy impurities. The method is suitable for quantitative evaluation of backscattering spectra measured with low energy ions.

  5. [Effect of spectra on growth of chlorella and isochrysis].

    Science.gov (United States)

    Mao, An-Jun; Wang, Jing; Lin, Xue-Zheng; Meng, Ji-Wu

    2008-05-01

    Focusing on the speed and efficiency, the effects of different spectra on the growth of chlorella vulgaris and isochrysis galbana Parke 8701 were investigated by using monochromatic LED (light-emitting diode) and fluorescent lamp as light sources. It was concluded that continuous spectra accelerate the top-growth-rate, blue light has the best efficiency, and the combination of them can obtain a good balance of speed and efficiency. For the purpose of measuring spectra as a parameter of irradiation quantitatively, spectra-absorbability-coefficient defined as the quanta-absorbability- efficiency of spectra for algae was calculated by means of absorption spectra of algae and emission spectra of light sources. Compared with the experimental results the coefficients of different light sources have a positive correlation to their efficiency for growth, so the coefficient can be used to elementarily quantify the relation between the spectra and the efficiency for growth.

  6. Study on Mössbauer spectra of hemoglobin in thalassemia

    Science.gov (United States)

    Xuanhui, Guo; Nanming, Zhao; Xiufang, Zhang; Naifei, Gao; Youwen, Huang; Rongxin, Wang

    1988-02-01

    The57Fe Mössbauer spectra of erythrocytes in normal subjects and nine patients of different thalassemias were studied. Together with clinical analysis, the correlation between the components in the spectra and different types of anemias was discussed.

  7. Evaluation of secondary and prompt fission neutron spectra

    Energy Technology Data Exchange (ETDEWEB)

    Porodzinskij, Yu.V.; Sukhovitskij, E.Sh. [Radiation Physics and Chemistry Problems Inst., Minsk-Sosny (Belarus)

    1997-03-01

    A simple model allowing to split neutron emission spectra into reaction partials is suggested. Predicted spectra of (n,n`{gamma}), (n,n`f), etc appear to be much harder than usually evaluated. (author)

  8. Classification of specialty seed meals from NIR reflectance spectra

    Science.gov (United States)

    Near infrared reflectance spectroscopy was used to identify alternative seed meals proposed for food and feed formulations. Spectra were collected from cold pressed Camelina (Camelina sativa), Coriander (Coriandrum sativum), and Pennycress (Thlaspi arvense) meals. Additional spectra were collected ...

  9. Avaliação da comunicação no espectro autístico: interferência da familiaridade no desempenho de linguagem Assessing communication in the autistic spectrum: interference of familiarity in language performance

    Directory of Open Access Journals (Sweden)

    Camila Ramos Moreira

    2010-01-01

    Full Text Available OBJETIVO: Analisar a interferência da familiaridade da situação de avaliação na funcionalidade da comunicação de sujeitos com diagnóstico incluído no Espectro Autístico, buscando o melhor procedimento para avaliação da comunicação desta população. MÉTODOS: Participaram da presente pesquisa 18 sujeitos com diagnóstico incluído nos Distúrbios do Espectro Autístico, com idades entre três anos e 11 meses e 17 anos e 11 meses, com média etária de oito anos e nove meses (DP: 3,6 anos. Inicialmente foi realizada a filmagem da interação de cada participante com sua terapeuta em situação rotineira de avaliação (Situação Familiar, semelhante às sessões semanais de atendimento, e nas sessões seguintes foi realizada outra filmagem de cada sujeito em interação com uma fonoaudióloga não-familiar, com materiais lúdicos pré-determinados (Situação Não-Familiar. Os dados de interação foram transcritos e analisados e as variáveis foram selecionadas a partir do protocolo do Perfil Funcional da Comunicação (PFC. RESULTADOS: A comparação entre as situações demonstrou diferença apenas para quatro variáveis (23%, dentre as dezessete analisadas; três dessas mostraram resultado superior na Situação Familiar: atos comunicativos expressados por minuto, número de respostas e porcentagem de utilização da função comunicativa Não-Focalizada, e uma delas se mostrou superior na Situação Não-Familiar: porcentagem de utilização da função comunicativa Jogo. CONCLUSÃO: A interferência da familiaridade da situação comunicativa no desempenho comunicativo de sujeitos autistas é mínima, sendo que o procedimento de avaliação nos mesmos moldes da Situação Familiar mostrou-se ligeiramente melhor para a avaliação da comunicação dessa população.PURPOSE: To identify the best technique to assess the communication of autistic spectrum individuals, analyzing the interference of the familiarity of the situation

  10. Mapping SOC in a river catchment by integrating laboratory spectra wavelength with remote sensing spectra

    DEFF Research Database (Denmark)

    Peng, Yi; Xiong, Xiong; Knadel, Maria;

    There is potential to use soil ·-proximal and remote sensing derived spectra concomitantly to develop soil organic carbon (SOC) models. Yet mixing spectral data from different sources and technologies to improve soil models is still in its infancy. The objective of this study was to incorporate...... soil spectral features indicative of SOC from laboratory visible near-infrared reflectance (vis-NlR) spectra and incorporate them with remote sensing (RS) images to improve predictions of top SOC in the Skjem river catchment, Denmark. The secondary objective was to improve prediction results...... by separately calibrating samples from upland and wetland. We hypbthesize that final prediction accuracy is significantly improved by incorporatin1 laboratory vis-NlR images upscaled from point-based spectra to catchment scale and RS data for topsoil SOC spatial modeling....

  11. Measurement of turbulence spectra using scanning pulsed wind lidars

    NARCIS (Netherlands)

    Sathe, A.; Mann, J.

    2012-01-01

    Turbulent velocity spectra, as measured by a scanning pulsed wind lidar (WindCube), are analyzed. The relationship between ordinary velocity spectra and lidar derived spectra is mathematically very complex, and deployment of the three-dimensional spectral velocity tensor is necessary. The resulting

  12. Spectra of {gamma} rays feeding superdeformed bands

    Energy Technology Data Exchange (ETDEWEB)

    Lauritsen, T.; Khoo, T.L.; Henry, R.G. [and others

    1995-08-01

    The spectrum of {gamma}rays coincident with SD transitions contains the transitions which populate the SD band. This spectrum can provide information on the feeding mechanism and on the properties (moment of inertia, collectivity) of excited SD states. We used a model we developed to explain the feeding of SD bands, to calculate the spectrum of feeding {gamma}rays. The Monte Carlo simulations take into account the trigger conditions present in our Eurogam experiment. Both experimental and theoretical spectra contain a statistical component and a broad E2 peak (from transitions occurring between excited states in the SD well). There is good resemblance between the measured and calculated spectra although the calculated multiplicity of an E2 bump is low by {approximately}30%. Work is continuing to improve the quality of the fits, which will result in a better understanding of excited SD states. In addition, a model for the last steps, which cool the {gamma} cascade into the SD yrast line, needs to be developed. A strong M1/E2 low-energy component, which we believe is responsible for this cooling, was observed.

  13. Reflectance Spectra of Space Debris in GEO

    Science.gov (United States)

    Schildknecht, T.; Vannanti, A.; Krag, H.; Erd, C.

    The space debris environment in the Geostationary Earth Orbit (GEO) region is mostly investigated by means of optical surveys. Such surveys revealed a considerable amount of debris in the size range of 10 centimeter to one meter. Some of these debris exhibit particularly high area-to-mass ratios as derived from the evolution of their orbits. In order to understand the nature and eventually the origin of these objects, observations allowing to derive physical characteristics like size, shape and material are required. Information on the shape and the attitude motion of a debris piece may be obtained by photometric light curves. The most promising technique to investigate the surface material properties is reflectance spectroscopy. This paper discusses preliminary results obtained from spectrometric observations of space debris in GEO. The observations were acquired at the 1-meter ESA Space Debris Telescope (ESASDT) on Tenerife with a low-resolution spectrograph in the wavelength range of 450-960 nm. The target objects were space debris of different types with brightness as small as magnitude 15. Some simple-shaped, intact "calibration objects" with known surface materials like the MSG-2 satellites were also observed. The spectra show shape variations expected to be caused by the different physical properties of the objects. The determination of the possible materials is still in a preliminary phase. Limitations of the acquisition process of the spectra and the subsequent analysis are discussed. Future steps planned for a better characterization of the debris from the observed data are briefly outlined.

  14. Non-gaussian CMBR angular power spectra

    CERN Document Server

    Magueijo, J

    1995-01-01

    In this paper we show how the prediction of CMBR angular power spectra C_l in non-Gaussian theories is affected by a cosmic covariance problem, that is (C_l,C_{l'}) correlations impart features on any observed C_l spectrum which are absent from the average C^l spectrum. Therefore the average spectrum is rendered a bad observational prediction, and two new prediction strategies, better adjusted to these theories, are proposed. In one we search for hidden random indices conditional to which the theory is released from the correlations. Contact with experiment can then be made in the form of the conditional power spectra plus the random index distribution. In another approach we apply to the problem a principal component analysis. We discuss the effect of correlations on the predictivity of non-Gaussian theories. We finish by showing how correlations may be crucial in delineating the borderline between predictions made by non-Gaussian and Gaussian theories. In fact, in some particular theories, correlations may ...

  15. Theoretical Spectra of Terrestrial Exoplanet Surfaces

    CERN Document Server

    Hu, Renyu; Seager, Sara

    2012-01-01

    We investigate spectra of airless rocky exoplanets with a theoretical framework that self-consistently treats reflection and thermal emission. We find that a silicate surface on an exoplanet is spectroscopically detectable via prominent Si-O features in the thermal emission bands of 7 - 13 \\mu m and 15 - 25 \\mu m. The variation of brightness temperature due to the silicate features can be up to 20 K for an airless Earth analog, and the silicate features are wide enough to be distinguished from atmospheric features with relatively high-resolution spectra. The surface characterization thus provides a method to unambiguously identify a rocky exoplanet. Furthermore, identification of specific rocky surface types is possible with the planet's reflectance spectrum in near-infrared broad bands. A key parameter to observe is the difference between K band and J band geometric albedos (A_g (K)-A_g (J)): A_g (K)-A_g (J) > 0.2 indicates that more than half of the planet's surface has abundant mafic minerals, such as oliv...

  16. Estimating Eulerian Energy Spectra from Drifters

    Directory of Open Access Journals (Sweden)

    J. H. LaCasce

    2016-10-01

    Full Text Available The relations between the kinetic energy spectrum and the second-order longitudinal structure function for 2D non-divergent flow are derived, and several examples are considered. The transform from spectrum to structure function is illustrated using idealized power-law spectra of turbulent inertial ranges. The results illustrate how the structure function integrates contributions across wavenumber, which can obscure the dependencies when the inertial ranges are of finite extent. The transform is also applied to the kinetic energy spectrum of Nastrom and Gage (1985, derived from aircraft data in the upper troposphere; the resulting structure function agrees well with that of Lindborg (1999, calculated with the same data. The transform from structure function to spectrum is then tested with data from 2D turbulence simulations. When applied to the (Eulerian structure function obtained from the transform of the spectrum, the result closely resembles the original spectrum, except at the largest wavenumbers. The deviation at large wavenumbers occurs because the transform involves a filter function which magnifies contributions from large separations. The results are noticeably worse when applied to the structure function obtained from pairs of particles in the flow, as this is usually noisy at large separations. Fitting the structure function to a polynomial improves the resulting spectrum, but not sufficiently to distinguish the correct inertial range dependencies. Furthermore, the transform of steep (non-local spectra is largely unsuccessful. Thus, it appears that with Lagrangian data, it is probably preferable to focus on structure functions, despite their shortcomings.

  17. Video-based ocean wave spectra

    Science.gov (United States)

    Harbitz, Alf

    1994-07-01

    A particular video spot detector provides an irradiance time series from an arbitrarily chosen pixel in the video frame. The detector is applied to video records of the ocean surface, and the correspondence between the 1D irradiance frequency spectrum and the corresponding ocean surface elevation spectrum is studied. A major experimental results is that the frequency peak in the irradiance spectrum for a typical wind-driven sea is significantly enhanced compared to the surface slope spectrum. Video experiments from the oil rig Gullfaks A in the North Sea show an excellent agreement between the enhanced peak frequency in the irradiance spectrum and the peak frequency in the surface elevation spectrum measured by a microwave remote ocean surveillance wave radar. The enhancement of the peak in the irradiance spectrum is explained by a strong nonlinear geometrical projection effect. This is due to the rather small look angle with the horizontal, which is chosen so as to neglect irradiance contributions from beneath the sea surface. Based on a simple stochastic model that takes the geometric effect into account, irradiance spectra are simulated and are in good agreement with the experimental spectra.

  18. Atomic Spectra Bibliography Databases at NIST

    Science.gov (United States)

    Kramida, Alexander

    2008-05-01

    NIST's Atomic Spectroscopy Data Center maintains three online Bibliographic Databases (BD) containing references to papers with atomic data for controlled fusion research, modeling and diagnostics of astrophysical and terrestrial plasmas, and fundamental properties of electronic spectra of atoms and ions. The NIST Atomic Energy Levels and Spectra BD [http://physics.nist.gov/elevbib] now includes about 11500 references, mostly for years 1967--2007. The NIST Atomic Transition Probability BD, v. 8.1 [http://physics.nist.gov/fvalbib] with its 7500 references mainly covers years 1964--2007. The NIST Spectral Line Broadening BD, v. 2.0 [http://physics.nist.gov/linebrbib] has 3670 references, mostly for 1978--2006. All three databases are maintained in a unified database management system that allows us to quickly update the contents. Updates become available to users on the next day. An automated Data Entry module makes it easy to enter and categorize the data. The system allows us to keep the contents of all BDs up to date. A number of enhancements made since last year greatly increased public usability of the databases. This work is supported in part by the Office of Fusion Energy Sciences of the U.S. Department of Energy and by the National Aeronautics and Space Administration.

  19. Manifestaciones gastrointestinales en trastornos del espectro autista

    Directory of Open Access Journals (Sweden)

    Lenny G. González

    2005-06-01

    Full Text Available Unrecognized gastrointestinal disorders, may contribute to the behavioral problems of the non-verbal autistic patients. The objective of this article is to describe any observations about the possible association between the brain and gastrointestinal dysfunctions in children with autistic disorder.

  20. Manifestaciones gastrointestinales en trastornos del espectro autista.

    OpenAIRE

    Lenny G. González

    2009-01-01

    Existe una serie de desordenes gastrointestinales no reconocidos, que pueden contribuir a los problemas de bienestar de los niños autistas no verbales. Se presentan algunos que permiten determinar la posible asociación entre el cerebro y las disfunciones gastrointestinales en niños con desórdenes autistas.