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Sample records for voigt suzanne lustie

  1. Leonard Cohen: Suzanne. Abschliessende Bemerkungen (Final Comments)

    Science.gov (United States)

    Marsden, Josefine

    1977-01-01

    A response to criticisms of the article "Interpretation of a Pop Song at the Upper High School Level--Leonard Cohen: 'Suzanne'," defending the interpretative procedure, including its text orientation and its emphasis on the teacher's exposition. (Text is in German.) (IFS/WGA)

  2. Voigt-wave propagation in active materials

    CERN Document Server

    Mackay, Tom G

    2015-01-01

    If a dissipative anisotropic dielectric material, characterized by the permittivity matrix $\\underline{\\underline{\\epsilon}}$, supports Voigt-wave propagation, then so too does the analogous active material characterized by the permittivity matrix $\\underline{\\underline{{\\tilde{\\epsilon}}}}$, where $\\underline{\\underline{{\\tilde{\\epsilon}}}}$ is the hermitian conjugate of $\\underline{\\underline{\\epsilon}}$. Consequently, a dissipative material that supports Voigt-wave propagation can give rise to a material that supports the propagation of Voigt waves with attendant linear gain in amplitude with propagation distance, by infiltration with an active dye.

  3. Some Representations of Unified Voigt Functions

    Institute of Scientific and Technical Information of China (English)

    M. KAMARUJJAMA; Dinesh SINGH

    2005-01-01

    The authors derive a set of unified representations of the Voigt functions in terms of familiar special functions of Mathematical Physics. Some deductions from these representations are also considered.

  4. Leonard Cohen: Suzanne. Eine methodische Alternative (A Methodological Alternative)

    Science.gov (United States)

    Bluemer, Hermann

    1977-01-01

    Criticizes a critique by J. Marsden of Leonard Cohen's pop song "Suzanne" as material for high school foreign language teaching. States that the song is useful in classes of boys and that Marsden asks for too much teacher guidance. A procedure with greater student activity is outlined. (Text is in German.) (IFS/WGA)

  5. Controlling Voigt waves by the Pockels effect

    CERN Document Server

    Mackay, Tom G

    2014-01-01

    Voigt wave propagation was investigated in a homogenized composite material (HCM) arising from a porous electro--optic host material infiltrated by a fluid of refractive index $n_a$. The constitutive parameters of the HCM were estimated using the extended Bruggeman homogenization formalism. Numerical studies revealed that the directions which support Voigt wave propagation in the HCM could be substantially controlled by means of an applied dc electric field. Furthermore, the extent to which this control could be achieved was found to be sensitive to the porosity of the host material, the shapes, sizes and orientations of the pores, as well as the refractive index $n_a$. These findings may be particularly significant for potential technological applications of Voigt waves, such as in optical sensing.

  6. Generalized Voigt functions and their derivatives

    Energy Technology Data Exchange (ETDEWEB)

    Sampoorna, M. [Indian Institute of Astrophysics, Koramangala, Bangalore 560 034 (India) and Laboratoire Cassiopee (CNRS, UMR 6202), Observatoire de la Cote d' Azur, BP 4229, F-06304 Nice Cedex 4 (France)]. E-mail: sampoorna@iiap.res.in; Nagendra, K.N. [Indian Institute of Astrophysics, Koramangala, Bangalore 560 034 (India); Laboratoire Cassiopee (CNRS, UMR 6202), Observatoire de la Cote d' Azur, BP 4229, F-06304 Nice Cedex 4 (France); Frisch, H. [Laboratoire Cassiopee (CNRS, UMR 6202), Observatoire de la Cote d' Azur, BP 4229, F-06304 Nice Cedex 4 (France)

    2007-03-15

    This paper deals with a special class of functions called generalized Voigt functions H{sup (n)}(x,a) and G{sup (n)}(x,a) and their partial derivatives, which are useful in the theory of polarized spectral line formation in stochastic media. For n=0 they reduce to the usual Voigt and Faraday-Voigt functions H(x,a) and G(x,a). A detailed study is made of these new functions. Simple recurrence relations are established and employed for the calculation of the functions themselves and of their partial derivatives. Asymptotic expansions are given for large values of x and a. They are used to examine the range of applicability of the recurrence relations and to construct a numerical algorithm for the calculation of the generalized Voigt functions and of their derivatives valid in a large (x,a) domain. It is also shown that the partial derivatives of the usual H(x,a) and G(x,a) can be expressed in terms of H{sup (n)}(x,a) and G{sup (n)}(x,a)

  7. Claude Cahun and Suzanne Malherbe: an "amour fou"

    Directory of Open Access Journals (Sweden)

    Silvia Mazzucchelli

    2013-02-01

    Full Text Available Claude Cahun is a writer and photographer born in Nantes in 1894. The purpose of this work is to explore her polymorphic and fluctuating identity through the artistic and affective link with her partner Suzanne Malherbe. Starting from the analysis of the iconic themes composing the visual symbol used by the two artists to sanction the exclusivity of their affair, we can conclude that Claude Cahun, by the means of her partner, becomes the absolute protagonist of her work, demolishing the wall between reality and art. 

  8. Tornando-se Outro: entrevista com Suzanne Oakdale

    Directory of Open Access Journals (Sweden)

    Rita de Cácia Oenning da Silva

    2015-06-01

    Full Text Available ResumoSuzanne Oakdale é uma etnóloga norte-americana que trabalha com os Kawaiweté, conhecidos também como Kayabi, povo que vive no Parque do Xingu desde os anos 1950. É antropóloga formada pela Chicago University com orientação de Terence Turner. Professora de antropologia na University of New Mexico (UNM em Albuquerque, EUA, trabalha com os temas pessoa e agência, ritual e religião, contato, história, narrativas autobiográficas com ênfase na Amazônia Brasileira. Na entrevista que segue, que foi feita em 2012 na UNM (Albuquerque, a autora fala do seu trabalho, da sua formação como antropóloga, da antropologia brasileira, da vida e da contribuição dos Kawaiweté para a antropologia, da história do seu contato com o Brasil e com a antropologia brasileira. A entrevista perpassa por temas como agência, alteridade, produção de pessoa, identidade, história, cantos, presença de criança na pesquisa de campo, entre outros. A entrevista apresenta especialmente a contribuição de Suzanne para uma antropologia da autobiografia e da performance, com uma especial atenção à história dos Kawaiweté.

  9. Relationship among the Voigt integral and the dispersion function of plasma. Additional methods for estimating the Voigt integral; Relacion entre la integral de Voigt y la funcion de dispersion del plasma. Metodos adicionales para estimar la integral de Voigt

    Energy Technology Data Exchange (ETDEWEB)

    Jimenez D, H.; Flores L, H.; Cabral P, A.; Bravo O, A

    1990-05-15

    A relationship among the Lorentzian-Gaussian profile convolution and the Plasma Dispersion Function is presented; thus, the methods available to calculate the latter serve also to calculate the Voigt profile. (Author)

  10. Interpretation eines Popsongs in der Sekundarstufe 2. Leonard Cohen: Suzanne (Interpretation of a Pop Song ((Leonard Cohen's "Suzanne")) in Secondary Grade 2)

    Science.gov (United States)

    Marsden, Josefine

    1976-01-01

    Describes use of the pop song "Suzanne" in a Secondary Grade 2 class of girls. This song by Leonard Cohen is regarded as superior to most pop songs, appropriate for the group because of its themes (love, religion), and as a good example of lyric poetry. (Text is in German.) (IFS/WGA)

  11. Voigt's transformations and the beginning of the relativistic revolution

    CERN Document Server

    Heras, Ricardo

    2014-01-01

    In 1887 W. Voigt published a paper on the Doppler effect, which marked the birth of the relativistic revolution. In his paper Voigt derived a set of spacetime transformations by demanding covariance to the homogeneous wave equation in inertial frames, and this was an application of the first postulate of special relativity. Voigt assumed in his derivation the invariance of the speed of light in inertial frames, and this is the second postulate of special relativity. He then applied the postulates of special relativity to the wave equation 18 years before Einstein explicitly enunciated these postulates. Voigt's transformations questioned the Newtonian notion of absolute time for the first time in physics by suggesting that the absolute time should be replaced by the non-absolute time $t'=t-vx/c^2$. Unfortunately, Voigt's 1887 paper was not appreciated by most physicists of that time. Voigt's transformations do not form a group and are an example of the conformal symmetry of spacetime. In the present paper we e...

  12. Computational aspects of speed-dependent Voigt profiles

    Science.gov (United States)

    Schreier, Franz

    2017-01-01

    The increasing quality of atmospheric spectroscopy observations has indicated the limitations of the Voigt profile routinely used for line-by-line modeling, and physical processes beyond pressure and Doppler broadening have to be considered. The speed-dependent Voigt (SDV) profile can be readily computed as the difference of the real part of two complex error functions (i.e. Voigt functions). Using a highly accurate code as a reference, various implementations of the SDV function based on Humlíček's rational approximations are examined for typical speed dependences of pressure broadening and the range of wavenumber distances and Lorentz to Doppler width ratios encountered in infrared applications. Neither of these implementations appears to be optimal, and a new algorithm based on a combination of the Humlíček (1982) and Weideman (1994) rational approximations is suggested.

  13. The Influence of Emerging Nursing Strategy and Policy Leaders: An Interview With Dr Suzanne Miyamoto.

    Science.gov (United States)

    Miyamoto, Suzanne; Adams, Jeffrey M

    2015-09-01

    This department highlights emerging nursing leaders who have demonstrated great potential in advancing innovation and patient care leadership in practice, policy, research, education, and theory. This interview profiles Suzanne Miyamoto, PhD, RN, Senior Director of Government Affairs and Health Policy at the American Association of Colleges of Nursing.

  14. Leonard Cohen: Suzanne. Kritische Anmerkungen zur Interpretation (Critical Comments on Interpretation)

    Science.gov (United States)

    Faulstich, Werner

    1977-01-01

    Criticizes a critique by J. Marsden of Leonard Cohen's pop song "Suzanne" as material for high school foreign language teaching. States that Marsden's article is concerned only with the text. The music agrees with the theme (loneliness) and with the "social milieu." (Text is in German.) (IFS/WGA)

  15. On the propagation of Voigt waves in energetically active materials

    Science.gov (United States)

    Mackay, Tom G.; Lakhtakia, Akhlesh

    2016-11-01

    If Voigt-wave propagation is possible in a dissipative anisotropic dielectric material characterised by the permittivity dyadic \\mathop{\\varepsilon }\\limits\\raise{2pt=}, then it is also possible in the analogous energetically active material characterised by the permittivity dyadic \\mathop{\\tilde{\\varepsilon }}\\limits\\raise{2pt=}, where \\mathop{\\tilde{\\varepsilon }}\\limits\\raise{2pt=} is the hermitian conjugate of \\mathop{\\varepsilon }\\limits\\raise{2pt=}. This symmetry follows directly from a theoretical analysis of the necessary and sufficient conditions for Voigt-wave propagation in anisotropic materials. As a consequence of this symmetry, a porous dissipative material that exhibits Voigt-wave propagation can be used to construct a material that allows the propagation of Voigt waves with attendant linear gain in amplitude with propagation distance, by means of infiltration with an electrically or optically activated dye, for example. This phenomenon is captured by the Bruggeman formalism for homogenised composite materials based on isotropic dielectric component materials that are randomly distributed as oriented spheroidal particles.

  16. Comparison between classical Kelvin-Voigt and fractional derivative Kelvin-Voigt models in prediction of linear viscoelastic behaviour of waste activated sludge.

    Science.gov (United States)

    Farno, Ehsan; Baudez, Jean-Christophe; Eshtiaghi, Nicky

    2017-09-22

    Appropriate sewage sludge rheological models are essential for computational fluid dynamic simulation of wastewater treatment processes, in particular aerobic and anaerobic digestions. The liquid-like behaviour of sludge is well documented but the solid-like behaviour remains poorly described despite its importance for dead-zone formation. In this study, classical Kelvin-Voigt model, commonly used for sludge in literature, were compared with fractional derivative Kelvin-Voigt model regarding their predictive ability for describing the solid-like behaviour. Results showed that the fractional Kelvin-Voigt model best fitted the experimental data obtained from creep and frequency sweep tests. Whereas, classical Kelvin-Voigt could not fit the frequency sweep data as this model is not a function of angular velocity. Also, the Kelvin-Voigt model was unable to predict the creep data at low stresses. Copyright © 2017 Elsevier B.V. All rights reserved.

  17. The Last Battle: With "Mockingjay" on Its Way, Suzanne Collins Weighs in on Katniss and the Capitol

    Science.gov (United States)

    Margolis, Rick

    2010-01-01

    Ever since Katniss Everdeen, the arrow-slinging heroine of Suzanne Collins's "Hunger Games" trilogy, was snatched from the cruel clutches of a ruthless government, one can't stop thinking about the feisty 16-year-old from District 12. What sort of flesh-devouring, mutant killing machine awaits her next? How can she possibly lead a successful…

  18. Fast and accurate expression for the Voigt function. Application to the determination of uranium M linewidths

    Energy Technology Data Exchange (ETDEWEB)

    Limandri, Silvina P. [Facultad de Matematica, Astronomia y Fisica, Universidad Nacional de Cordoba, Ciudad Universitaria, 5000, Cordoba (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas de la Republica Argentina (Argentina); Bonetto, Rita D. [Consejo Nacional de Investigaciones Cientificas y Tecnicas de la Republica Argentina (Argentina) and Centro de Investigacion y Desarrollo en Ciencias Aplicadas Dr. Jorge Ronco, Calle 47 No 257, 1900 La Plata, Argentina; Facultad de Ciencias Exactas y Facultad de Ingenieria de la UNLP, La Plata (Argentina); Di Rocco, Hector O. [Consejo Nacional de Investigaciones Cientificas y Tecnicas de la Republica Argentina (Argentina); Instituto de Fisica Arroyo Seco, Facultad de Ciencias Exactas, Universidad Nacional del Centro, Pinto 399, 7000 Tandil (Argentina); Trincavelli, Jorge C. [Facultad de Matematica, Astronomia y Fisica, Universidad Nacional de Cordoba, Ciudad Universitaria, 5000, Cordoba (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas de la Republica Argentina (Argentina)], E-mail: jorge@quechua.fis.uncor.edu

    2008-09-15

    The Voigt function is the convolution between a Gaussian and a Lorentzian distribution. The numerical implementation of this function is required in diverse areas of physics and applied mathematics. An explicit representation for the Voigt function is developed in terms of series of trigonometric and hyperbolic functions. The obtained expression permits a very fast evaluation of Voigt profiles with a degree of accuracy higher than the one required for spectroscopy applications. In addition, this expression is implemented in a numerical algorithm of parameter optimization in electron probe microanalysis, and applied to determine natural linewidths for several transitions to the uranium M levels.

  19. Fast Fourier transform for Voigt profile: Comparison with some other algorithms

    Science.gov (United States)

    Abousahl, S.; Gourma, M.; Bickel, M.

    1997-02-01

    There are different algorithms describing the Voigt profile. This profile is encountered in many areas of physics which could be limited by the resolution of the instrumentation used to measure it and by other phenomena like the interaction between the emitted waves and matter. In nuclear measurement field, the codes used to characterise radionucleides rely on algorithms resolving the Voigt profile equation. The Fast Fourier Transform (FFT) algorithm allows the validation of some algorithms.

  20. Suzanne F. Delbanco on the Leapfrog Group and employer purchasing power. Interview by Pamela K. Scarrow.

    Science.gov (United States)

    Delbanco, Suzanne F

    2004-01-01

    Suzanne F. Delbanco, PhD MPH, is the first executive director of The Leapfrog Group, founded by the Business Roundtable. The Leapfrog Group's goal is to mobilize employer purchasing power to initiate breakthrough improvements in the safety, quality, and overall value of healthcare for American consumers. The group's growing consortium of more than 155 Fortune 500 companies and other large private and public healthcare purchasers provides health benefits to more than 34 million Americans; these companies spend more than 62 billion dollars on healthcare annually. Dr. Delbanco is a member of the National Committee for Quality Assurance Purchaser Advisory Council and a board member of Bridges to Excellence. Before joining The Leapfrog Group, she was a senior manager at the Pacific Business Group on Health (PBGH), where she worked on the quality team. Prior to joining PBGH, she worked on reproductive health policy and the changing healthcare marketplace initiative at the Henry J. Kaiser Family Foundation. She has also consulted on health insurance coverage in the temporary employment industry and on the first statewide survey in California of MediCal beneficiaries, and worked as a community Liaison for Kaiser Permanente during the establishment of one of California's first County Organized Health Systems. She holds a PhD in public policy from the Goldman School of Public PoLicy and a MPH from the School of Public Health at the University of California, Berkeley.

  1. Evolution equations of the probabilistic generalization of the Voigt profile function

    CERN Document Server

    Pagnini, Gianni

    2007-01-01

    The spectrum profile that emerges in molecular spectroscopy and atmospheric radiative transfer as the combined effect of Doppler and pressure broadenings is known as the Voigt profile function. Because of its convolution integral representation, the Voigt profile can be interpreted as the probability density function of the sum of two independent random variables with Gaussian density (due to the Doppler effect) and Lorentzian density (due to the pressure effect). Since these densities belong to the class of symmetric L\\'evy stable distributions, a probabilistic generalization is proposed as the convolution of two arbitrary symmetric L\\'evy densities. We study the case when the widths of the considered distributions depend on a scale-factor $\\tau$ that is representative of spatial inhomogeneity or temporal non-stationarity. The evolution equations for this probabilistic generalization of the Voigt function are here introduced and interpreted as generalized diffusion equations containing two Riesz space-fracti...

  2. Voigt waves in homogenized particulate composites based on isotropic dielectric components

    CERN Document Server

    Mackay, Tom G

    2011-01-01

    Homogenized composite materials (HCMs) can support a singular form of optical propagation, known as Voigt wave propagation, while their component materials do not. This phenomenon was investigated for biaxial HCMs arising from nondissipative isotropic dielectric component materials. The biaxiality of these HCMs stems from the oriented spheroidal shapes of the particles which make up the component materials. An extended version of the Bruggeman homogenization formalism was used to investigate the influence of component particle orientation, shape and size, as well as volume fraction of the component materials, upon Voigt wave propagation. Our numerical studies revealed that the directions in which Voigt waves propagate is highly sensitive to the orientation of the component particles and to the volume fraction of the component materials, but less sensitive to the shape of the component particles and less sensitive still to the size of the component particles. Furthermore, whether or not such an HCM supports Vo...

  3. Simple atmospheric transmittance calculation based on a Fourier-transformed Voigt profile.

    Science.gov (United States)

    Kobayashi, Hirokazu

    2002-11-20

    A method of line-by-line transmission calculation for a homogeneous atmospheric layer that uses the Fourier-transformed Voigt profile is presented. The method is based on a pure Voigt function with no approximation and an interference term that takes into account the line-mixing effect. One can use the method to calculate transmittance, considering each line shape as it is affected by temperature and pressure, with a line database with an arbitrary wave-number range and resolution. To show that the method is feasible for practical model development, we compared the calculated transmittance with that obtained with a conventional model, and good consistency was observed.

  4. Down from Olympus: Archaeology and Philhellenism in Germany, 1750-1970, by Suzanne L. Marchand. Princeton University Press, 1996

    Directory of Open Access Journals (Sweden)

    Bruce G. Trigger

    1997-11-01

    Full Text Available Down from Olympus is a magnificent contribution to the history of archaeology. Historian Suzanne Marchand traces how for over 150 years, mediated by research institutions and government patronage, the German intelligentsia's infatuation with the ancient Greeks shaped the development of German archaeology. Interaction between scholars and government officials made possible great accomplishments in collecting, fieldwork, and specialized scholarship and enabled classical archaeologists to control the development of other branches of archaeology. Marchand argues that growing dependence on state patronage also shaped the development of classical archaeology in ways that were not conducive to its professional and moral integrity.

  5. Seismic wave propagating in Kelvin-Voigt homogeneous visco-elastic media

    Institute of Scientific and Technical Information of China (English)

    YUAN; Chunfang; PENG; Suping; ZHANG; Zhongjie; LIU; Zhenkuan

    2006-01-01

    This paper studies, under a small disturbance, the responses of seismic transient wave in the visco-elastic media and the analytic solution of the corresponding third-order partial differential equation. A plane wave solution of Kelvin-Voigt homogeneous visco-elastic third-order partial differential equation with a pulse source is obtained. By the principle of pulse stacking of particle vibration, the result is extended to the solution of Kelvin-Voigt homogeneous visco-elastic third-order partial differential equation with any source. The velocities of seismic wave propagating and the attenuation of seismic wave in Kelvin-Voigt homogeneous visco-elastic media are discussed. The velocities of seismic wave propagating and the coefficient of attenuation of seismic wave in Kelvin-Voigt homogeneous visco-elastic media are derived, expressed as functions of density of the media, elastic modulus and visco-elastic coefficient. These results can be applied in inversing lithology parameters in geophysical prospecting.

  6. Mida suudab muusikateraapia? / Melanie Voigt, Esa Ala-Ruona ; inetrvjueerinud Kristel Kossar

    Index Scriptorium Estoniae

    Voigt, Melanie

    2012-01-01

    Eesti Muusika- ja Teatriakadeemias toimunud Euroopa Muusikateraapia Konföderatsiooni peaassambleel ja sümpoosionil ettekannetega esinenud muusikaterapeudid Malanie Voigt Saksamaalt ja Esa Ala-Ruona Soomest räägivad tööst puuetega lastega ja tööstressist ning heliilmast

  7. Mida suudab muusikateraapia? / Melanie Voigt, Esa Ala-Ruona ; inetrvjueerinud Kristel Kossar

    Index Scriptorium Estoniae

    Voigt, Melanie

    2012-01-01

    Eesti Muusika- ja Teatriakadeemias toimunud Euroopa Muusikateraapia Konföderatsiooni peaassambleel ja sümpoosionil ettekannetega esinenud muusikaterapeudid Malanie Voigt Saksamaalt ja Esa Ala-Ruona Soomest räägivad tööst puuetega lastega ja tööstressist ning heliilmast

  8. Detection of Voigt Spectral Line Profiles of Hydrogen Radio Recombination Lines toward Sagittarius B2(N)

    CERN Document Server

    von Prochazka, Azrael A; Balser, Dana S; Ryans, Robert S I; Marshall, Adele H; Schwab, Fredric R; Hollis, Jan M; Jewell, Philip R; Lovas, Frank J

    2010-01-01

    We report the detection of Voigt spectral line profiles of radio recombination lines (RRLs) toward Sagittarius B2(N) with the 100-m Green Bank Telescope (GBT). At radio wavelengths, astronomical spectra are highly populated with RRLs, which serve as ideal probes of the physical conditions in molecular cloud complexes. An analysis of the Hn(alpha) lines presented herein shows that RRLs of higher principal quantum number (n>90) are generally divergent from their expected Gaussian profiles and, moreover, are well described by their respective Voigt profiles. This is in agreement with the theory that spectral lines experience pressure broadening as a result of electron collisions at lower radio frequencies. Given the inherent technical difficulties regarding the detection and profiling of true RRL wing spans and shapes, it is crucial that the observing instrumentation produce flat baselines as well as high sensitivity, high resolution data. The GBT has demonstrated its capabilities regarding all of these aspects,...

  9. Analyse d'un autoportrait : Suzanne Gallois, militante syndicaliste et communiste de l'Aube

    OpenAIRE

    Harden-Chenut, Helen

    2005-01-01

    « Les femmes de Troyes ont toujours été des bagarreuses, ah oui, très batailleuses... Jamais j'ai vu des femmes résignées à Troyes ». Suzanne Gallois définit ainsi les bonnetières troyennes. On pourrait faire le portrait de cette militante syndicaliste dans les mêmes termes. Au bout d'une vie très longue d'activité militante, elle n'a rien perdu de sa verve, de sa passion du syndicalisme. Dans la période de l'entre-deux-guerres, elles ne sont pas très nombreuses à militer et à assumer ...

  10. Digital signal processor-based high-precision on-line Voigt lineshape fitting for direct absorption spectroscopy.

    Science.gov (United States)

    Xu, Lijun; Liu, Chang; Zheng, Deyan; Cao, Zhang; Cai, Weiwei

    2014-12-01

    To realize on-line high-accuracy measurement in direct absorption spectroscopy (DAS), a system-on-chip, high-precision digital signal processor-based on-line Voigt lineshape fitting implementation is introduced in this paper. Given that the Voigt lineshape is determined by the Gauss full width at half maximum (FWHM) and Lorentz FWHM, a look-up table, which covers a range of combinations of both, is first built to achieve rapid and accurate calculation of Voigt lineshape. With the look-up table and raw absorbance data in hand, Gauss-Newton nonlinear fitting module is implemented to obtain the parameters including both the Gauss and Lorentz FWHMs, which can be used to calculate the integrated absorbance. To realize the proposed method in hardware, a digital signal processor (DSP) is adopted to fit the Voigt lineshape in a real-time DAS measurement system. In experiment, temperature and H2O concentration of a flat flame are recovered from the transitions of 7444.36 cm(-1) and 7185.6 cm(-1) by the DSP-based on-line Voigt lineshape fitting and on-line integral of the raw absorbance, respectively. The results show that the proposed method can not only fit the Voigt lineshape on-line but also improve the measurement accuracy compared with those obtained from the direct integral of the raw absorbance.

  11. Spectral Line-Shape Model to Replace the Voigt Profile in Spectroscopic Databases

    Science.gov (United States)

    Lisak, Daniel; Ngo, Ngoc Hoa; Tran, Ha; Hartmann, Jean-Michel

    2014-06-01

    The standard description of molecular line shapes in spectral databases and radiative transfer codes is based on the Voigt profile. It is well known that its simplified assumptions of absorber free motion and independence of collisional parameters from absorber velocity lead to systematic errors in analysis of experimental spectra, and retrieval of gas concentration. We demonstrate1,2 that the partially correlated quadratic speed-dependent hardcollision profile3. (pCqSDHCP) is a good candidate to replace the Voigt profile in the next generations of spectroscopic databases. This profile takes into account the following physical effects: the Doppler broadening, the pressure broadening and shifting of the line, the velocity-changing collisions, the speed-dependence of pressure broadening and shifting, and correlations between velocity- and phase/state-changing collisions. The speed-dependence of pressure broadening and shifting is incorporated into the pCqSDNGP in the so-called quadratic approximation. The velocity-changing collisions lead to the Dicke narrowing effect; however in many cases correlations between velocityand phase/state-changing collisions may lead to effective reduction of observed Dicke narrowing. The hard-collision model of velocity-changing collisions is also known as the Nelkin-Ghatak model or Rautian model. Applicability of the pCqSDHCP for different molecular systems was tested on calculated and experimental spectra of such molecules as H2, O2, CO2, H2O in a wide span of pressures. For all considered systems, pCqSDHCP is able to describe molecular spectra at least an order of magnitude better than the Voigt profile with all fitted parameters being linear with pressure. In the most cases pCqSDHCP can reproduce the reference spectra down to 0.2% or better, which fulfills the requirements of the most demanding remote-sensing applications. An important advantage of pCqSDHCP is that a fast algorithm for its computation was developedab4,5 and allows

  12. The intensity calculation of the gas absorption line by multi-line Voigt fitting

    Institute of Scientific and Technical Information of China (English)

    ZHOU Meng-ran; LI Zhen-bi; ZHONG Ming-yu; HE Gang

    2008-01-01

    Adopted the distribution feedback type (DFB) laser to measure the coal mine gas methane, according to the methane located 1.6 lain nearby 2v3 with a R9 direct ab-sorption spectrum, attraction wire intensity of each line was calculated through the multi-line Voigt fitting. The experimental result indicates that in the obtained four attraction recover of wire, the maximum deviation is 2.7%, and the minimum deviation is 0.02%, other results are all in experimental error scope. This research method may apply in the spectrum survey methane gas density, it has characteristics including high precision, strong selectivity, fast response and so on.

  13. Cambiar el arte para cambiar el mundo (Una perspectiva feminista Diálogo abierto con Suzanne Lacy

    Directory of Open Access Journals (Sweden)

    Elena García-Oliveros

    2016-03-01

    Full Text Available Este artículo ahonda en la perspectiva activista y transformadora de las artistas feministas que surgieron en la década de los años 70, indagando en su particular visión acerca de la capacidad del arte para crear nuevos modelos sociales integradores. A partir del caso de la artista norteamericana Suzanne Lacy, con quien las autoras han mantenido diversos encuentros de carácter público en el Centro de Arte Contemporáneo Matadero de Madrid, se pormenorizan las estrategias que el feminismo ha trabado en torno al arte público y se busca una redefinición de los ejes principales que sustentan el medio artístico actual: la autoría, la obra y su difusión y el valor final de la pieza. La investigación continúa con los estudios de caso de la artista ciberfeminista Shu Lea Cheang, la artista de origen paraguayo Faith Wilding y el colectivo madrileño Toxic Lesbian.

  14. Fractional Generalizations of Maxwell and Kelvin-Voigt Models for Biopolymer Characterization.

    Directory of Open Access Journals (Sweden)

    Bertrand Jóźwiak

    Full Text Available The paper proposes a fractional generalization of the Maxwell and Kelvin-Voigt rheological models for a description of dynamic behavior of biopolymer materials. It was found that the rheological models of Maxwell-type do not work in the case of modeling of viscoelastic solids, and the model which significantly better describes the nature of changes in rheological properties of such media is the modified fractional Kelvin-Voigt model with two built-in springpots (MFKVM2. The proposed model was used to describe the experimental data from the oscillatory and creep tests of 3% (w/v kuzu starch pastes, and to determine the values of their rheological parameters as a function of pasting time. These parameters provide a lot of additional information about structure and viscoelastic properties of the medium in comparison to the classical analysis of dynamic curves G' and G" and shear creep compliance J(t. It allowed for a comprehensive description of a wide range of properties of kuzu starch pastes, depending on the conditions of pasting process.

  15. Self-truncation and scaling in Euler-Voigt-α and related fluid models.

    Science.gov (United States)

    Di Molfetta, Giuseppe; Krstlulovic, Giorgio; Brachet, Marc

    2015-07-01

    A generalization of the 3D Euler-Voigt-α model is obtained by introducing derivatives of arbitrary order β (instead of 2) in the Helmholtz operator. The β→∞ limit is shown to correspond to Galerkin truncation of the Euler equation. Direct numerical simulations (DNS) of the model are performed with resolutions up to 2048(3) and Taylor-Green initial data. DNS performed at large β demonstrate that this simple classical hydrodynamical model presents a self-truncation behavior, similar to that previously observed for the Gross-Pitaeveskii equation in Krstulovic and Brachet [Phys. Rev. Lett. 106, 115303 (2011)]. The self-truncation regime of the generalized model is shown to reproduce the behavior of the truncated Euler equation demonstrated in Cichowlas et al. [Phys. Rev. Lett. 95, 264502 (2005)]. The long-time growth of the self-truncation wave number k(st) appears to be self-similar. Two related α-Voigt versions of the eddy-damped quasinormal Markovian model and the Leith model are introduced. These simplified theoretical models are shown to reasonably reproduce intermediate time DNS results. The values of the self-similar exponents of these models are found analytically.

  16. The implementation of non-Voigt line profiles in the HITRAN database: H2 case study

    Science.gov (United States)

    Wcisło, P.; Gordon, I. E.; Tran, H.; Tan, Y.; Hu, S.-M.; Campargue, A.; Kassi, S.; Romanini, D.; Hill, C.; Kochanov, R. V.; Rothman, L. S.

    2016-07-01

    Experimental capabilities of molecular spectroscopy and its applications nowadays require a sub-percent or even sub-per mille accuracy of the representation of the shapes of molecular transitions. This implies the necessity of using more advanced line-shape models which are characterized by many more parameters than a simple Voigt profile. It is a great challenge for modern molecular spectral databases to store and maintain the extended set of line-shape parameters as well as their temperature dependences. It is even more challenging to reliably retrieve these parameters from experimental spectra over a large range of pressures and temperatures. In this paper we address this problem starting from the case of the H2 molecule for which the non-Voigt line-shape effects are exceptionally pronounced. For this purpose we reanalyzed the experimental data reported in the literature. In particular, we performed detailed line-shape analysis of high-quality spectra obtained with cavity-enhanced techniques. We also report the first high-quality cavity-enhanced measurement of the H2 fundamental vibrational mode. We develop a correction to the Hartmann-Tran profile (HTP) which adjusts the HTP to the particular model of the velocity-changing collisions. This allows the measured spectra to be better represented over a wide range of pressures. The problem of storing the HTP parameters in the HITRAN database together with their temperature dependences is also discussed.

  17. A Postcolonial Appraisal of Suzanne Collins’ The Hunger Games in the Light of Bhabha’s Ideas

    Directory of Open Access Journals (Sweden)

    Roya Ghaffarpour

    2013-07-01

    Full Text Available The present paper has tried to apply Bhabha's significant notions such as mimicry, ambivalence and stereotype to Suzanne Collins' The Hunger Games. Bhabha believes that in the interaction of the colonizer and the colonized both cultures are affected and neither culture can claim to have a pure and fixed status. In the process of interaction, the identity of both colonizer and the colonized undergoes serious changes. The colonizer stereotypes the colonized, regarding them as the inferior, thoughtless beings. The colonized seeing them in power internalize what they say, perceiving themselves as backward and the colonizer as superior, sophisticated beings. As they consider the colonizer as the sophisticated, powerful culture, they try to imitate them (this is actually what the colonizer wants which are not the exact copy but the parody of them, causing crack in the dominance of the colonizer. In this interaction, not only the colonized's identity but also the colonizer's alters. This is in fact what happens in Collins' The Hunger Games. The characters in the novel when encountering the colonizer's culture change their identity and become who they want them to be; however, the characters also through some resistance make the colonizer to follow what they assign for them. Moreover, during the course of the novel, the characters find an ambivalent character as a result of experiencing unhomeliness. This ambivalence makes them have a double consciousness, to be attracted toward the colonized culture and at the same time repulsed it.                             Keywords: Identity, Ambivalence, Mimicry, Stereotype, Unhomeliness

  18. A high-field pulsed magnet system for x-ray scattering studies in Voigt geometry

    CERN Document Server

    Islam, Zahirul; Ruff, Jacob P C; Das, Ritesh K; Trakhtenberg, Emil; Nojiri, Hiroyuki; Narumi, Yasuo; Canfield, Paul C

    2011-01-01

    We present a new pulsed-magnet system that enables x-ray single-crystal diffraction in addition to powder and spectroscopic studies in Voigt geometry. The apparatus consists of a large-bore solenoid, cooled by liquid nitrogen. A second independent closed-cycle cryostat is used for cooling samples near liquid helium temperatures. Pulsed magnetic fields up to ~30 T with a minimum of ~6 ms in total duration are generated by discharging a 40 kJ capacitor bank into the magnet coil. The unique characteristic of this instrument is the preservation of maximum scattering angle (~23.6 deg.) through the magnet bore by virtue of a novel double-funnel insert. This instrument would facilitate x-ray diffraction and spectroscopic studies that are impractical, if not impossible, to perform using conventional split-pair magnets and offers a practical solution for preserving optical access in future higher-field pulsed magnets.

  19. Generalized Continuum: from Voigt to the Modeling of Quasi-Brittle Materials

    Directory of Open Access Journals (Sweden)

    Jamile Salim Fuina

    2010-12-01

    Full Text Available This article discusses the use of the generalized continuum theories to incorporate the effects of the microstructure in the nonlinear finite element analysis of quasi-brittle materials and, thus, to solve mesh dependency problems. A description of the problem called numerically induced strain localization, often found in Finite Element Method material non-linear analysis, is presented. A brief historic about the Generalized Continuum Mechanics based models is presented, since the initial work of Voigt (1887 until the more recent studies. By analyzing these models, it is observed that the Cosserat and microstretch approaches are particular cases of a general formulation that describes the micromorphic continuum. After reporting attempts to incorporate the material microstructure in Classical Continuum Mechanics based models, the article shows the recent tendency of doing it according to assumptions of the Generalized Continuum Mechanics. Finally, it presents numerical results which enable to characterize this tendency as a promising way to solve the problem.

  20. The intensity calculation of the gas absorption line by multi-line Voigt fitting

    Institute of Scientific and Technical Information of China (English)

    ZHOU Meng-ran; LI Zhen-bi; ZHONG Ming-yu; HE Gang

    2008-01-01

    Adopted the distribution feedback type (DFB) laser to measure the coal minegas methane,according to the methane located 1.6 pm nearby 2 v3 with a R9 direct ab-sorption spectrum,attraction wire intensity of each line was calculated through the multi-line Voigt fitting.The experimental result indicates that in the obtained four attraction recover of wire,the maximum deviation is 2.7%,and the minimum deviation is 0.02%,other results are all in experimental error scope.This research method may apply in the spectrum survey methane gas density,it has characteristics including high precision,strong selectivity,fast response and so on.

  1. On the sensitivity of directions which support Voigt wave propagation in infiltrated biaxial dielectric materials

    CERN Document Server

    Mackay, Tom G

    2013-01-01

    Voigt wave propagation (VWP) was considered in a porous biaxial dielectric material which was infiltrated with a material of refractive index $n_a$. The infiltrated material was regarded as a homogenized composite material in the long-wavelength regime and its constitutive parameters were estimated using the extended Bruggeman homogenization formalism. In our numerical studies, the directions which support VWP were found to vary by as much as $300^\\circ$ per RIU as the refractive index $n_a$ was varied. The sensitivities achieved were acutely dependent upon the refractive index $n_a$ and the degrees of anisotropy and dissipation of the porous biaxial material. The orientations, shapes and sizes of the particles which constitute the infiltrating material and the porous biaxial material exerted only a secondary influence on the maximum sensitivities achieved. Also, for the parameter ranges considered, the degree of porosity of the biaxial material had little effect on the maximum sensitivities achieved. These n...

  2. Lack of exponential stability to Timoshenko system with viscoelastic Kelvin-Voigt type

    Science.gov (United States)

    Malacarne, Andréia; Muñoz Rivera, Jaime Edilberto

    2016-06-01

    We study the Timoshenko systems with a viscoelastic dissipative mechanism of Kelvin-Voigt type. We prove that the model is analytical if and only if the viscoelastic damping is present in both the shear stress and the bending moment. Otherwise, the corresponding semigroup is not exponentially stable no matter the choice of the coefficients. This result is different to all others related to Timoshenko model with partial dissipation, which establish that the system is exponentially stable if and only if the wave speeds are equal. Finally, we show that the solution decays polynomially to zero as {t^{-1/2}} , no matter where the viscoelastic mechanism is effective and that the rate is optimal whenever the initial data are taken on the domain of the infinitesimal operator.

  3. Casimir force between two parallel semiconductor slabs: Magnetic field effects in the Voigt geometry

    Energy Technology Data Exchange (ETDEWEB)

    Garcia-Serrano, R.; Palomino-Ovando, M. [Facultad de Ciencias Fisico-Matematicas, Universidad Autonoma de Puebla, Puebla (Mexico); Martinez, G.; Hernandez, P.H.; Cocoletzi, Gregorio H. [Instituto de Fisica, Universidad Autonoma de Puebla, Puebla (Mexico)

    2009-06-15

    We investigate the Casimir force F between two parallel semiconductor slabs taking into account magnetoplasmon effects. For our calculations we consider an external magnetic field applied in the Voigt geometry. Studies are carried out using the formula of F, which is written in terms of the reflectivities of the incident electromagnetic (EM) waves onto the surfaces of the semiconductor slabs, in the vacuum gap between slabs. Results show that the Casimir force depends strongly on the slab thickness as well as on the magnetic-field strength (or equivalently on the cyclotron frequency). At a constant cyclotron frequency and for small slab thickness F/F{sub 0} (F{sub 0} is the ideal force) displays a dip at small separation distances L between slabs. F/F{sub 0} increases with L up to saturation as the slab thickness increases. The curve with the strongest value of F/F{sub 0} corresponds to the semi-infinite medium geometry. For a constant slab thickness and small cyclotron frequency, F/F{sub 0} as a function of L shows a monotonic increase as L increases, and eventually reaches saturation. At high cyclotron frequency F/F{sub 0} displays a dip. The curve of F/F{sub 0} with no applied external field corresponds to the one with the strongest Casimir force. Therefore, magnetoplasmon effects, with an applied magnetic field in the Voigt geometry may inhibit the Casimir force. (copyright 2009 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

  4. Assessing composition and structure of soft biphasic media from Kelvin-Voigt fractional derivative model parameters

    Science.gov (United States)

    Zhang, Hongmei; Wang, Yue; Fatemi, Mostafa; Insana, Michael F.

    2017-03-01

    Kelvin-Voigt fractional derivative (KVFD) model parameters have been used to describe viscoelastic properties of soft tissues. However, translating model parameters into a concise set of intrinsic mechanical properties related to tissue composition and structure remains challenging. This paper begins by exploring these relationships using a biphasic emulsion materials with known composition. Mechanical properties are measured by analyzing data from two indentation techniques—ramp-stress relaxation and load-unload hysteresis tests. Material composition is predictably correlated with viscoelastic model parameters. Model parameters estimated from the tests reveal that elastic modulus E 0 closely approximates the shear modulus for pure gelatin. Fractional-order parameter α and time constant τ vary monotonically with the volume fraction of the material’s fluid component. α characterizes medium fluidity and the rate of energy dissipation, and τ is a viscous time constant. Numerical simulations suggest that the viscous coefficient η is proportional to the energy lost during quasi-static force-displacement cycles, E A . The slope of E A versus η is determined by α and the applied indentation ramp time T r. Experimental measurements from phantom and ex vivo liver data show close agreement with theoretical predictions of the η -{{E}A} relation. The relative error is less than 20% for emulsions 22% for liver. We find that KVFD model parameters form a concise features space for biphasic medium characterization that described time-varying mechanical properties. The experimental work was carried out at the Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. Methodological development, including numerical simulation and all data analysis, were carried out at the school of Life Science and Technology, Xi’an JiaoTong University, 710049, China.

  5. Jiaxiang’s Lusty Suona Blowers

    Institute of Scientific and Technical Information of China (English)

    1993-01-01

    JLAXLANG County,under thejurisdiction of Luoning.a prin-cipal city in southwesternShandong,bordering Q(?)fu andZoucheng,is one of the birth places of central Chinese culture.EasternHan Dynasty stone carvings on thetombs of the Wu family record theprosperity of Jiaxiang at that time.Most impressive are vivld deplctionsof suona(Chinese cornet)bands,highlighting Jiaxiang as the“homeof suona music.”

  6. Suitable weak solutions to the 3D Navier-Stokes equations are constructed with the Voigt approximation

    Science.gov (United States)

    Berselli, Luigi C.; Spirito, Stefano

    2017-03-01

    In this paper we consider the Navier-Stokes equations supplemented with either the Dirichlet or vorticity-based Navier slip boundary conditions. We prove that weak solutions obtained as limits of solutions of the Navier-Stokes-Voigt model satisfy the local energy inequality, and we also prove certain regularity results for the pressure. Moreover, in the periodic setting we prove that if the parameters are chosen in an appropriate way, then we can construct suitable weak solutions through a Fourier-Galerkin finite-dimensional approximation in the space variables.

  7. Investigation of Peak Separation for X-ray Diffraction Profiles of Spinodal Decomposition by a Kind of Optimized Voigt Function

    Institute of Scientific and Technical Information of China (English)

    Liuding WANG; Junqiang ZHOU; Quanxi CAO; Zhao CHEN

    2003-01-01

    The intensity and position of sidebands (satellites) on both sides of main diffraction peak in a great number of X-ray diffraction profiles of alloys always change with progress of aging. The sidebands position is determined by a newly optimized Voigt function in present investigation. Furthermore, for Cu-4 wt pct Ti alloy aged at 400℃ for 720 min and 1080 min, after introducing the weight factor of above two satellites intensity, the relative error between the fitting curves and X-ray diffraction profiles is less than 0.185%, which is more precise than the previously calculating result.

  8. Broadening of the Spectral Atomic Lines Analysis in High Density Argon Corona Plasma by Using Voigt Profile

    Science.gov (United States)

    Nur, M.; Bonifaci, N.; Denat, A.; Atrazhev, V. M.

    2015-06-01

    Studies of spectrum emission from high density argon plasma corona has been done. The analysis of the boardening of spectral atomic lines of Ar-I profile has been curried out by using an empirical approximation based on a Voigt profile. Full-width at half-maximum (FWHM) of the spectral-lines of 763.5 nm has been determined from atmospheric pressure until liquid state. The study liquid argon was curried out in a variation of temperature from K to 151.2 K and hydrostatics pressure from 2.1 MPa to 6.4 MPa. These pressure gives the densities N∞ (i.e. density very far from ionization zone) a variation from 1.08 1022 to 2.11 1022 cm-3. FWHM of Voigt approximation (Wv) of the line 763,5 nm of 'Ar I for: the emission lamp very low pressure (Wv = 0,160 nm) and our corona discharge at a pressure of MPa (Wv = 0,67 nm) and at a pressure of 9,5 MPa (Wv = 1,16 nm). In gas, corona plasma has been generated from 0.1 MPa to 9.5 MPa. We found that the broadening spectral line increase by increasing densities both for. the spectral-lines of 763.5 nm and 696.5 nm. We concluded that broadening of spectrum cause of Van der Waals force.

  9. Voigt transformations in retrospect: missed opportunities? One more essay on the Einstein-Poincar\\'e priority dispute

    CERN Document Server

    Chashchina, Olga; Silagadze, Zurab

    2016-01-01

    Perception of the world by human beings, and of scientific papers in particular, depends on everybody's background shaped by historical circumstances. As put in words by English poet William Blake, in his idiosyncratic and provocative form, "A fool sees not the same tree as the wise man sees". Scientific knowledge is progressing continuously. Therefore, it is not surprising that reading today a paper written more than a hundred years ago, we can extract much more of it than was actually thought or dreamed by the author himself. We demonstrate this on the example of Woldemar Voigt's 1887 paper. From the modern perspective, it may appear that this paper opens a way to both the special relativity and to its anisotropic Finslerian generalization which came into the focus only recently, in relation with the Cohen and Glashow's very special relativity proposal. With some imagination, one can connect Voigt's paper to the notorious Einstein-Poincar\\'e priority dispute, which we comment in light of the above mentioned...

  10. 《汉英篇章对比研究》评介%Ron Scollon, Suzanne Wong Scollon & Andy Kirkpatrick (2000).Contrastive Discourse in Chinese and English:A Critical Appraisal

    Institute of Scientific and Technical Information of China (English)

    王勇

    2004-01-01

    《汉英篇章对比研究》是外语教学与研究出版社2000年出版的一本有关汉英篇章对比的英文著作。全书由Ron Scollon,Suzanne Wong Scollon及Andy Kirkpatrick三位作者合写而成,顾日国教授作序。三位作者都是近十年来在汉英语篇对比(修辞对比)方面用力颇多的学者。Ron Scollon和Suzanne Wong Scollon是美国学者,

  11. VoIgt profile Parameter Estimation Routine (VIPER): H I photoionization rate at z<0.5

    CERN Document Server

    Gaikwad, Prakash; Choudhury, Tirthankar Roy; Khaire, Vikram

    2016-01-01

    We have developed a parallel code called "VoIgt profile Parameter Estimation Routine (VIPER)" for automatically fitting the H I Ly-$\\alpha$ forest seen in the spectra of QSOs. We obtained the H I column density distribution function (CDDF) and line width ($b$) parameter distribution for $z < 0.45$ using spectra of 82 QSOs obtained using Cosmic Origins Spectrograph and VIPER. Consistency of these with the existing measurements in the literature validate our code. By comparing this CDDF with those obtained from hydrodynamical simulation, we constrain the H I photoionization rate ($\\Gamma_{\\rm HI}$) at $z < 0.45$ in four redshift bins. The VIPER, together with the Code for Ionization and Temperature Evolution (CITE) we have developed for GADGET-2, allows us to explore parameter space and perform $\\chi^2$ minimization to obtain $\\Gamma_{\\rm HI}$. We notice that the $b$ parameters from the simulations are smaller than what are derived from the observations. We show the observed $b$ parameter distribution and...

  12. Unsteady Unidirectional Flow of Voigt Fluid through the Parallel Microgap Plates with Wall Slip and Given Inlet Volume Flow Rate Variations

    OpenAIRE

    Yinwei Lin; Chen, C. K.

    2015-01-01

    In order to solve the velocity profile and pressure gradient of the unsteady unidirectional slip flow of Voigt fluid, Laplace transform method is adopted in this research. Between the parallel microgap plates, the flow motion is induced by a prescribed arbitrary inlet volume flow rate which varies with time. The velocity slip condition on the wall and the flow conditions are known. In this paper, two basic flow situations are solved, which are a suddenly started and a constant acc...

  13. A Computational Investigation of the Finite-Time Blow-Up of the 3D Incompressible Euler Equations Based on the Voigt Regularization

    CERN Document Server

    Larios, Adam; Titi, Edriss S; Wingate, Beth

    2015-01-01

    We report the results of a computational investigation of two recently proved blow-up criteria for the 3D incompressible Euler equations. These criteria are based on an inviscid regularization of the Euler equations known as the 3D Euler-Voigt equations. The latter are known to be globally well-posed. Moreover, simulations of the 3D Euler-Voigt equations also require less resolution than simulations of the 3D Euler equations for fixed values of the regularization parameter $\\alpha>0$. Therefore, the new blow-up criteria allow one to gain information about possible singularity formation in the 3D Euler equations indirectly; namely, by simulating the better-behaved 3D Euler-Voigt equations. The new criteria are only known to be sufficient criteria for blow-up. Therefore, to test the robustness of the inviscid-regularization approach, we also investigate analogous criteria for blow-up of the 1D Burgers equation, where blow-up is well-known to occur.

  14. A new peak detection algorithm for MALDI mass spectrometry data based on a modified Asymmetric Pseudo-Voigt model

    Science.gov (United States)

    2015-01-01

    Background Mass Spectrometry (MS) is a ubiquitous analytical tool in biological research and is used to measure the mass-to-charge ratio of bio-molecules. Peak detection is the essential first step in MS data analysis. Precise estimation of peak parameters such as peak summit location and peak area are critical to identify underlying bio-molecules and to estimate their abundances accurately. We propose a new method to detect and quantify peaks in mass spectra. It uses dual-tree complex wavelet transformation along with Stein's unbiased risk estimator for spectra smoothing. Then, a new method, based on the modified Asymmetric Pseudo-Voigt (mAPV) model and hierarchical particle swarm optimization, is used for peak parameter estimation. Results Using simulated data, we demonstrated the benefit of using the mAPV model over Gaussian, Lorentz and Bi-Gaussian functions for MS peak modelling. The proposed mAPV model achieved the best fitting accuracy for asymmetric peaks, with lower percentage errors in peak summit location estimation, which were 0.17% to 4.46% less than that of the other models. It also outperformed the other models in peak area estimation, delivering lower percentage errors, which were about 0.7% less than its closest competitor - the Bi-Gaussian model. In addition, using data generated from a MALDI-TOF computer model, we showed that the proposed overall algorithm outperformed the existing methods mainly in terms of sensitivity. It achieved a sensitivity of 85%, compared to 77% and 71% of the two benchmark algorithms, continuous wavelet transformation based method and Cromwell respectively. Conclusions The proposed algorithm is particularly useful for peak detection and parameter estimation in MS data with overlapping peak distributions and asymmetric peaks. The algorithm is implemented using MATLAB and the source code is freely available at http://mapv.sourceforge.net. PMID:26680279

  15. Multispectral Fitting Validation of the Speed Dependent Voigt Profile at up to 1300K in Water Vapor with a Dual Frequency Comb Spectrometer

    Science.gov (United States)

    Schroeder, Paul James; Cich, Matthew J.; Yang, Jinyu; Drouin, Brian; Rieker, Greg B.

    2017-06-01

    Using broadband, high resolution dual frequency comb spectroscopy, we test the power law temperature scaling relationship with Voigt, Rautian, and quadratic speed dependent Voigt profiles over a temperature range of 296-1300K for pure water vapor. The instrument covers the spectral range from 6800 cm^{-1} to 7200 cm^{-1} and samples the (101)-(000), (200)-(000), (021)-(000), (111)-(010), (210)-(010), and (031)-(010) vibrational bands of water. The data is sampled with a point spacing of 0.0033 cm^{-1} and absolute frequency accuracy of coal gasifiers and other high temperature systems. In order to extract water concentration and temperature, an extended range of lineshape parameters are needed. Lineshape parameters for pure and argon broadened water are obtained for 278 transitions using the multispectral fitting program Labfit, including self-broadening coefficients, power law temperature scaling exponents, and speed dependence coefficients. The extended temperature range of the data provides valuable insight into the application of the speed-dependence corrections of the line profiles, which are shown to have more reasonable line broadening temperature dependencies.

  16. [Reiner Nürnberg, Ekkehard Höxtermann, Martina Voigt. Elisabeth Schiemann 1881-1972. Vom AußBruch der Genetik und der Frauen in den UmBrüchen des 20. Jahrhunderts] / Monika von Hirschheydt

    Index Scriptorium Estoniae

    Hirschheydt, Monika von

    2015-01-01

    Arvustus: Nürnberg, Reiner, Höxtermann, Ekkehard, Voigt, Martina. Elisabeth Schiemann 1881-1972. Vom AußBruch der Genetik und der Frauen in den UmBrüchen des 20. Jahrhunderts. Beiträge eines Symposiums zum 200. Gründungsjubiläum der Humboldt-Universität Berlin. Rangsdorf: Basilisken-Presse 2014

  17. [Reiner Nürnberg, Ekkehard Höxtermann, Martina Voigt. Elisabeth Schiemann 1881-1972. Vom AußBruch der Genetik und der Frauen in den UmBrüchen des 20. Jahrhunderts] / Monika von Hirschheydt

    Index Scriptorium Estoniae

    Hirschheydt, Monika von

    2015-01-01

    Arvustus: Nürnberg, Reiner, Höxtermann, Ekkehard, Voigt, Martina. Elisabeth Schiemann 1881-1972. Vom AußBruch der Genetik und der Frauen in den UmBrüchen des 20. Jahrhunderts. Beiträge eines Symposiums zum 200. Gründungsjubiläum der Humboldt-Universität Berlin. Rangsdorf: Basilisken-Presse 2014

  18. Pillar tuleb laulu, tantsu lusti ja koertega. Sõbrad musitseerivad

    Index Scriptorium Estoniae

    2006-01-01

    Rahvusvahelisest laste folkloorifestivalist "Porkuni Pillar" 3. ja 4. juunil. Hausjärvi muusika- ja kunstikallakuga koolide õpilaste külaskäigust Väike-Maarja Muusikakooli ja Kiltsi põhikooli õpilastele, kontsertetendusest 1. juunil Väike-Maarja rahvamajas

  19. Influence of yielding base and rigid base on propagation of Rayleigh-type wave in a viscoelastic layer of Voigt type

    Indian Academy of Sciences (India)

    S SAHA; A CHATTOPADHYAY; K C MISTRI; A K SINGH

    2017-09-01

    The present study aims to study the propagation of Rayleigh-type wave in a layer, composed of isotropic viscoelastic material of Voigt type, with the effect of yielding base and rigid base in two distinct cases.With the aid of an analytical treatment, closed-form expressions of phase velocity and damped velocity for both the cases are deduced. As a special case of the problem it is found that obtained results are in good agreement with the established standard results existing in the literature. It is established through the study that volume viscoelastic and shear-viscoelastic material parameter and yielding parameter have significant effect on phaseand damped velocities of Rayleigh-type wave in both the cases. Numerical calculations and graphical illustration have been carried out for both the considered cases in the presence and the absence of viscoelasticity. Acomparative study has been performed to analyse the effect of layer with yielding base, traction-free base and rigid base on the phase and damped velocities of Rayleigh-type wave.

  20. The properties of the extraordinary mode and surface plasmon modes in the three-dimensional magnetized plasma photonic crystals based on the magneto-optical Voigt effects

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Hai-Feng, E-mail: hanlor@163.com, E-mail: lsb@nuaa.edu.cn [Key Laboratory of Radar Imaging and Microwave Photonics (Nanjing Univ. Aeronaut. Astronaut.), Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China); Nanjing Artillery Academy, Nanjing 211132 (China); Liu, Shao-Bin, E-mail: hanlor@163.com, E-mail: lsb@nuaa.edu.cn; Tang, Yi-Jun [Key Laboratory of Radar Imaging and Microwave Photonics (Nanjing Univ. Aeronaut. Astronaut.), Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 (China)

    2014-06-15

    In this paper, the properties of the extraordinary mode and surface plasmon modes in the three-dimensional (3D) magnetized plasma photonic crystals (MPPCs) with face-centered-cubic lattices that are composed of the core tellurium (Te) spheres with surrounded by the homogeneous magnetized plasma shells inserted in the air, are theoretically investigated in detail by the plane wave expansion method, as the magneto-optical Voigt effects of magnetized plasma are considered (the incidence electromagnetic wave vector is perpendicular to the external magnetic field at any time). The optical switching or wavelength division multiplexer can be realized by the proposed 3D MPPCs. Our analyses demonstrate that the complete photonic band gaps (PBGs) and two flatbands regions for the extraordinary mode can be observed obviously. PBGs can be tuned by the radius of core Te sphere, the plasma density and the external magnetic field. The flatbands regions are determined by the existence of surface plasmon modes. Numerical simulations also show that if the thickness of magnetized plasma shell is larger than a threshold value, the band structures of the extraordinary mode will be similar to those obtained from the same structure containing the pure magnetized plasma spheres. In this case, the band structures also will not be affected by the inserted core spheres. It is also provided that the upper edges of two flatbands regions will not depend on the topology of lattice. However, the frequencies of lower edges of two flatbands regions will be convergent to the different constants for different lattices, as the thickness of magnetized plasma shell is close to zero.

  1. Cultivation of the Hairy Roots of Trichosanthes Bracteata Voigt in the Photobioreactor%大苞栝楼发根在光辐射发根反应器中的培养

    Institute of Scientific and Technical Information of China (English)

    徐明芳; 黄伟建; 葛湘峰; 陈心满

    2004-01-01

    利用农杆菌(Agrobacterium rhizogenes)R1601诱导药用植物大苞栝楼(Trichosanthes bracteata Voigt)外植体无菌苗发根,建立毛状根生物反应器培养系统.分析了光照强度、溶氧饱和强度及碳源等外界影响因子对反应器中发根生长的作用.结果表明:在光照强度为25W/m2、、溶氧饱和强度为80%时,发根的比生长速率与生物量维持在较高的水平;蔗糖对发根生长的促进作用明显优于葡萄糖:在30~40g/L的糖含量范围内,于MS培养基中采用两级添加方式添加蔗糖,发根生物量(9.5g/L)比采用单级添加方式的(7.2g/L)高出20%以上.

  2. Venemaa keelab osa kaupade sisseveo TIR-märkmiku katte all / Lauri Lusti

    Index Scriptorium Estoniae

    Lusti, Lauri

    1997-01-01

    1998. aastast rakendab Venemaa olulisi piiranguid seoses TIR-süsteemi kasutamisega kauba sisseveol. Lisatud Vene Föderatsiooni Riikliku Tollikomitee käskkiri 22. augustist 1997 nr. 513 "TIR-karneti kasutamine mõne kategooria kaupade veoks"

  3. Venemaa keelab osa kaupade sisseveo TIR-märkmiku katte all / Lauri Lusti

    Index Scriptorium Estoniae

    Lusti, Lauri

    1997-01-01

    1998. aastast rakendab Venemaa olulisi piiranguid seoses TIR-süsteemi kasutamisega kauba sisseveol. Lisatud Vene Föderatsiooni Riikliku Tollikomitee käskkiri 22. augustist 1997 nr. 513 "TIR-karneti kasutamine mõne kategooria kaupade veoks"

  4. Algorithm xxx: computing the Faddeyeva and Voigt functions

    CERN Document Server

    Zaghloul, Mofreh R

    2011-01-01

    We present a MATLAB function for the numerical evaluation of the Faddeyeva function w(z). The function is based on a newly developed accurate algorithm. In addition to its higher accuracy, the software provides a flexible accuracy vs efficiency trade-off through a controlling parameter that may be used to reduce accuracy and computational time and vice versa. Verification of the flexibility, reliability and superior accuracy of the algorithm is provided through comparison with standard algorithms available in other libraries and software packages.

  5. Introduction to Voigt's wind power plant. [energy conversion efficiency

    Science.gov (United States)

    Tompkin, J.

    1973-01-01

    The design and operation of a 100 kilowatt wind driven generator are reported. Its high speed three-bladed turbine operates at a height of 50 meters. Blades are rigidly connected to the hub and turbine revolutions change linearly with wind velocity, maintaining a constant speed ratio of blade tip velocity to wind velocity over the full predetermined wind range. Three generators installed in the gondola generate either dc or ac current. Based on local wind conditions, the device has a maximum output of 720 kilowatts at a wind velocity of 16 meters per second. Total electrical capacity is 750 kilowatts, and power output per year is 2,135,000 kilowatt/hours.

  6. Diffusion and wave behaviour in linear Voigt model

    CERN Document Server

    De Angelis, Monica

    2012-01-01

    A boundary value problem related to a third- order parabolic equation with a small parameter is analized. This equation models the one-dimensional evolution of many dissipative media as viscoelastic fluids or solids, viscous gases, superconducting materials, incompressible and electrically conducting fluids. Moreover, the third-order parabolic operator regularizes various non linear second order wave equations. In this paper, the hyperbolic and parabolic behaviour of the solution is estimated by means of slow time and fast time. As consequence, a rigorous asymptotic approximation for the solution is established.

  7. Valga linna päevad tutvustavad ettevõtlust ja pakuvad lusti kõigile / Merce Mäe ; interv. Helju Keskpalu

    Index Scriptorium Estoniae

    Mäe, Merce

    2002-01-01

    Programmis ka klaasimaali ja keraamika õpikoda, Karoly Klimo maalilnäitus ja Heino Käose fotonäitus kultuurikeskuses, vapinäitus Valga muuseumis, fotonäitus "Eilne ja tänane Valga" keskraamatukogus

  8. 结婚的男人是健康的男%A Married Man Is a Healthy Man By Suzanne Rostler

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    @@ 选译:汤笑添 Men who become widowed or divorced may lose more than a spouse. They are also likely to give up a range of health habits that help protect against disease and early death, results of a study suggest. 丧偶或离异的男子所失去的也许并不仅仅是他们的配偶.一项研究结果显示,他们还可能会舍弃一系列有益健康的习惯,这些习惯有助于预防疾病及早逝.

  9. Translating ancient Greek aspect: Sappho's Fr. 1 Voigt / Janika Päll

    Index Scriptorium Estoniae

    Päll, Janika, 1965-

    2007-01-01

    Vana-kreeka keele aspektist, selle kasutamisest ja tõlkimisprobleemidest Sappho luuletuse tõlkeid analüüsides. Lisas toodud ka Sappho luuletus originaalkeeles, tõlked ladina, eesti, inglise, saksa, itaalia, prantsuse ja vene keelde

  10. Remark on "Algorithm 916: Computing the Faddeyeva and Voigt functions": Efficiency Improvements and Fortran Translation

    CERN Document Server

    Zaghloul, Mofreh R

    2015-01-01

    This remark describes efficiency improvements to Algorithm 916 [Zaghloul and Ali 2011]. It is shown that the execution time required by the algorithm, when run at its highest accuracy, may be improved by more than a factor of two. A better accuracy vs efficiency trade off scheme is also implemented; this requires the user to supply the number of significant figures desired in the computed values as an extra input argument to the function. Using this trade-off, it is shown that the efficiency of the algorithm may be further improved significantly while maintaining reasonably accurate and safe results that are free of the pitfalls and complete loss of accuracy seen in other competitive techniques. The current version of the code is provided in Matlab and Scilab in addition to a Fortran translation prepared to meet the needs of real-world problems where very large numbers of function evaluations would require the use of a compiled language. To fulfill this last requirement, a recently proposed reformed version o...

  11. The Physical Conditions of Intermediate Redshift MgII Absorbing Clouds from Voigt Profile Analysis

    CERN Document Server

    Churchill, C W; Charlton, J; Churchill, Chris; Vogt, Steven; Charlton, Jane

    2003-01-01

    [Slightly Abridged] We present a detailed statistical analysis of the column densities, N, and Doppler parameters, b, of MgII absorbing clouds at redshifts 0.4~5 km/s for MgII and FeII and ~7 km/s for MgI. The clouds are consistent with being thermally broadened, with temperatures in the 30-40,000K range. (4) A two-component Gaussian model to the velocity two-point correlation function yielded velocity dispersions of 54 km/s and 166 km/s. The narrow component has roughly twice the amplitude of the broader component. The width and amplitude of the broader component decreases as equivalent width increases. (5) From photoionization models we find that the column density ratios are most consistent with photoionization by the extragalactic background, as opposed to stars. Based upon N(MgI)/N(MgII), it appears that at least two-phase ionization models are required to explain the data.

  12. Translating ancient Greek aspect: Sappho's Fr. 1 Voigt / Janika Päll

    Index Scriptorium Estoniae

    Päll, Janika, 1965-

    2007-01-01

    Vana-kreeka keele aspektist, selle kasutamisest ja tõlkimisprobleemidest Sappho luuletuse tõlkeid analüüsides. Lisas toodud ka Sappho luuletus originaalkeeles, tõlked ladina, eesti, inglise, saksa, itaalia, prantsuse ja vene keelde

  13. SCREENING OF ANTIMICROBIAL, CYTOTOXIC AND PESTICIDAL ACTIVITIES OF COCCINIA GRANDIS (L. VOIGT

    Directory of Open Access Journals (Sweden)

    Md. Faruk Hasan

    2016-06-01

    Full Text Available This study was undertaken to assess the antibacterial, antifungal, cytotoxic and pesticidal activities of Coccinia grandis roots extract. The antimicrobial activity was evaluated using disc diffusion method against some pathogenic microorganisms. Cytotoxicity was determined using brine shrimp lethality bioassay method. The plant extract was screened for pesticidal activity towards Sitophilus oryzae adults. Minimum inhibitory concentration (MIC was also studied against test organisms, using serial dilution technique to determine the antibacterial potency. In antibacterial screening, large inhibition zones were observed against the tested gram-positive (Bacillus subtilis, Sarcina lutea and Stapphylococcus aureus and gram-negative (Salmonella typhi and Shigella dysenteriae bacteria. In antifungal screening, the extract showed moderate antifungal activities against the tested fungi (Candida albicans and Colletotrichum falcatum. In cytotoxicity activity test, LC50 (lethal concentration, 50% of the extract against brine shrimp nauplii was 15.00µg/ml. The plant extract also showed moderate pesticidal activities towards S. oryzae adults. These results suggested that the plant extract has significant antibacterial activity against the tested bacteria, moderate antifungal, cytotoxic and pesticidal activity towards the tested fungi, brine shrimp nauplii and S. oryzae adults, respectively.

  14. Catalogue of the mite families Ascidae Voigts & Oudemans, Blattisociidae Garman and Melicharidae Hirschmann (Acari: Mesostigmata).

    Science.gov (United States)

    Moraes, Gilberto J De; Britto, Erika P J; Mineiro, Jefferson L De C; Halliday, Bruce

    2016-05-19

    Until recently, mites in the families Ascidae, Blattisociidae and Melicharidae together constituted what was considered to be a single family, the Ascidae (sensu lato). We include all three families in this catalogue because of their many morphological similarities, as well as for historic and ecological reasons. Together with most Phytoseiidae and some Ameroseiidae, these are the only mesostigmatid mites commonly found on plants. In this publication we initially provide a historic overview of these groups, summarising the changes in the taxonomic concepts of the genera and other subfamilial taxa. This is followed by a thorough characterisation of each family and genus. A dichotomous key for the separation of families and genera is included. We then list the species considered to belong to these families, with details of the literature concerning the taxonomy of each species, and information about their type specimens and type localities wherever possible. The numbers of taxa considered as valid in this publication are: 372 species in 17 genera of Ascidae, 367 species in 14 genera of Blattisociidae, and 206 species in 11 genera of Melicharidae. We attempt to place each species in the most appropriate genus. In doing so, we propose 30 new combinations, including a species here transferred from Ascidae sensu stricto to Rhodacaridae. We propose five new names to replace junior homonyms, one new generic synonymy, and one new specific synonymy. Some species are insufficiently known and could not be reliably placed in any genus; these are listed as species incertae sedis. We also provide a list of species and genera that have been placed in these families at some time, but which have been transferred to other groups.

  15. Numerical implementation of Voigt and Maxwell models for simulation of waves in the ground

    Directory of Open Access Journals (Sweden)

    Sheshenin Sergey Vladimirovich

    2014-12-01

    Full Text Available A lot of papers have been dedicated to simulation of dynamic processes in soil and underground structures. For example, some authors considered wave distribution in underground water pipes for creation of vibration monitoring system, others considered theoretical and algorithm aspects of efficient implementation of realistic seismic wave attenuation due to viscosity development with the help of Finite Difference Method, etc. The paper describes the numerical simulation, designed for simulation of the stress-strain state in the ground subjected to wave processes. We consider the ground with a concrete structure immersed in. The purpose of the work is the description of small vibrations in hard soil, which can nevertheless make undesirable impact on the objects in the ground or on the surface. Explicit Wilkins type scheme is used for time integration. It has proven to be successful, including the use in a well-known LS-DYNA code. As a result we created our own computer code based on the finite element method (FEM. An example of its practical usage is given.

  16. The Archaeology of Regions, edited by Suzanne K. Fish and Stephen A. Kowalewski, Smithsonian Institution Press, Washington D.C. 1989

    Directory of Open Access Journals (Sweden)

    Alice B. Kehoe

    1993-05-01

    Full Text Available Eight papers report on full-coverage archaeological survey of regions, plus three commentator's discussions, argue for the value of full coverage rather than sampled surveys. As several authors note, no one would reject the potential of full-coverage surveys, yet it is a historical fact that most American archaeologists assume these are impractical and unnecessary, or worse, naive.

  17. The Archaeology of Regions, edited by Suzanne K. Fish and Stephen A. Kowalewski, Smithsonian Institution Press, Washington D.C. 1989

    OpenAIRE

    Alice B. Kehoe

    1993-01-01

    Eight papers report on full-coverage archaeological survey of regions, plus three commentator's discussions, argue for the value of full coverage rather than sampled surveys. As several authors note, no one would reject the potential of full-coverage surveys, yet it is a historical fact that most American archaeologists assume these are impractical and unnecessary, or worse, naive.

  18. BOOK REVIEW: ADRENALINE JUNKIES AND TEMPLATE ZOMBIES Understanding Patterns of Project Behavior by Tom Demarco, Peter Hruschka, Tim Lister, Steve McMenamin, James Robertson, Suzanne Robertson

    Directory of Open Access Journals (Sweden)

    DR. KADIR ALPASLAN DEMIR

    2016-10-01

    Full Text Available Today, armed forces are in continuous transformation. As new technologies are developed and new principles of war are introduced, the ministries of defenses and armed forces have to adapt to this changing environment. Almost every day, military officials start new projects to handle the technological and cultural transformations in the military. Project management became an integral part of defense development and management. Today, all high or middle level military officials are either a project sponsor overseeing a project, or a project manager executing a project, or a member of project team helping the project to become a reality. As a result, project management skills became an essential part of skillset that a military official need to successfully execute his/her duties.

  19. Blood Sugar Lowering Effect of Coccinia grandis (L. J. Voigt: Path for a New Drug for Diabetes Mellitus

    Directory of Open Access Journals (Sweden)

    M. A. A. K. Munasinghe

    2011-01-01

    Full Text Available Background. Role of herbs in the management and control of diabetes has emerged fast over the years. We assessed the efficacy of Coccinia grandis (locally known as Ken, Kovakka leaves as a hypoglycemic agent. Methods. Double-blind phase I clinical trial was conducted at the general hospital and a private hospital in Matara in August 2009. All the participants were given a common meal for dinner, and they maintained a 10-hour fasting period. Sixty-one healthy volunteers were given a meal containing 20 g of leaves of Coccinia grandis which was mixed with a measured amount of scraped coconut and table salt for breakfast, and other 61 were given the placebo meal which also contained scraped coconut and salt. Glucose tolerance test was performed blindly for the two groups. Mixed factorial design analysis of variance and student's t-test were applied. Results. Overall blood sugar levels of the experimental group were also significantly lower than those of the control group (F(1,117 5.56, <0.05. Increase in the blood sugar levels from fasting to one hour (F(1,117 6.77, <0.05 and two hours (F(1,117 5.28, <0.05 postprandially was statistically significant for participants who were in the control group than those of in the experimental group. The mean difference of postprandial blood sugar levels (mg/dL after one hour (20.2, 95% confidence interval, 4.81 to 35.5 and two hours (11.46, 95% confidence interval; 1.03 to 21.9 was statistically significant between the two groups. Conclusions. Coccinia grandis has a blood sugar lowering effect. However further studies are needed to validate our findings.

  20. A pseudo-Voigt component model for high-resolution recovery of constituent spectra in Raman spectroscopy

    DEFF Research Database (Denmark)

    Alstrøm, Tommy Sonne; Schmidt, Mikkel Nørgaard; Rindzevicius, Tomas

    2017-01-01

    Raman spectroscopy is a well-known analytical technique for identifying and analyzing chemical species. Since Raman scattering is a weak effect, surface-enhanced Raman spectroscopy (SERS) is often employed to amplify the signal. SERS signal surface mapping is a common method for detecting trace...

  1. Der moderne Staat : ein Glanzstück europäischer Form und occidentalen Rationalismus / Rüdiger Voigt

    Index Scriptorium Estoniae

    Voigt, Rüdiger

    2014-01-01

    Modernsest riigist, antiikse riigikunsti taassünnist, erinevatest riigiteooriatest (Machiavelli, Bodin, Hobbes, Locke, Montesquieu, Rousseau, Kant, Hegel, Marx, Jellinek, Weber, Habermas, Foucault, Agamben), globaliseerumise väljakutsetest, ohtudest, riigi tulevikust

  2. Der moderne Staat : ein Glanzstück europäischer Form und occidentalen Rationalismus / Rüdiger Voigt

    Index Scriptorium Estoniae

    Voigt, Rüdiger

    2014-01-01

    Modernsest riigist, antiikse riigikunsti taassünnist, erinevatest riigiteooriatest (Machiavelli, Bodin, Hobbes, Locke, Montesquieu, Rousseau, Kant, Hegel, Marx, Jellinek, Weber, Habermas, Foucault, Agamben), globaliseerumise väljakutsetest, ohtudest, riigi tulevikust

  3. Morphology, anatomy and histology of a new species of Flabellina Voigt, 1834 (Opisthobranchia: Aeolidoidea) from the Chilean coast

    NARCIS (Netherlands)

    Fischer, M.A.; Velde, G. van der; Roubos, E.W.

    2007-01-01

    Flabellina cerverai sp. nov. was found in Bay La Herradura, Coquimbo, North of Chile, and clearly differs from other members of the Flabellinidae by the following combination of main characters: (1) small body size (4.5–6.3 mm), (2) translucent-yellow body coloration, with a white line along the

  4. Morphology, anatomy and histology of a new species of Flabellina Voigt, 1834 (Opisthobranchia: Aeolidoidea) from the Chilean coast

    NARCIS (Netherlands)

    Fischer, M.A.; Velde, G. van der; Roubos, E.W.

    2007-01-01

    Flabellina cerverai sp. nov. was found in Bay La Herradura, Coquimbo, North of Chile, and clearly differs from other members of the Flabellinidae by the following combination of main characters: (1) small body size (4.5–6.3 mm), (2) translucent-yellow body coloration, with a white line along the dor

  5. Voigt modelling of size–strain analysis: Application to -Al2O3 prepared by combustion technique

    Indian Academy of Sciences (India)

    K Santra; P Chatterjee; S P Sen Gupta

    2002-06-01

    A comprehensive analysis of size and strain broadened profile shapes in X-ray diffraction line broadening analysis is presented. Both size and strain broadened profiles were assumed to be Voigtian and the derived microstructural parameters (size and strain) were found to be in close agreement with those calculated from model independent Warren–Averbach method. The method is applied to three different alumina samples viz. micron size -alumina (-Al2O3) prepared by the combustion of aluminium nitrate and urea mixture, annealed samples and commercial -Al2O3 sample. It is likely from the present analysis that a significant Gaussian size contribution is related to narrow size distribution observed from the analysis. It has been concluded that present Voigtian analysis is more reliable and may largely replace the earlier simplified integral breadth methods of analysis often used in line broadening analysis.

  6. A new peak detection algorithm for MALDI mass spectrometry data based on a modified Asymmetric Pseudo-Voigt model

    OpenAIRE

    Wijetunge, Chalini D; Saeed, Isaam; Boughton, Berin A.; Roessner, Ute; Saman K. Halgamuge

    2015-01-01

    Background Mass Spectrometry (MS) is a ubiquitous analytical tool in biological research and is used to measure the mass-to-charge ratio of bio-molecules. Peak detection is the essential first step in MS data analysis. Precise estimation of peak parameters such as peak summit location and peak area are critical to identify underlying bio-molecules and to estimate their abundances accurately. We propose a new method to detect and quantify peaks in mass spectra. It uses dual-tree complex wavele...

  7. Kilplased tulevad sünnilinna / Kaile Kabun

    Index Scriptorium Estoniae

    Kabun, Kaile

    2006-01-01

    Papa Kreutzwaldi Õueteatris Lauluisa muuseumi õuel esietendub 7. juulil Tartu Ülikooli Viljandi Kultuuriakadeemia kuuenda lennu teatritudengite lusti- ja laulumäng "Kilplased" F. R. Kreutzwaldi juttude ainetel (lavastaja Katri Aaslav-Tepandi)

  8. Kilplased tulevad sünnilinna / Kaile Kabun

    Index Scriptorium Estoniae

    Kabun, Kaile

    2006-01-01

    Papa Kreutzwaldi Õueteatris Lauluisa muuseumi õuel esietendub 7. juulil Tartu Ülikooli Viljandi Kultuuriakadeemia kuuenda lennu teatritudengite lusti- ja laulumäng "Kilplased" F. R. Kreutzwaldi juttude ainetel (lavastaja Katri Aaslav-Tepandi)

  9. Naised, kes juhivad mehi / Esme Kassak ; interv. Esme Kassak

    Index Scriptorium Estoniae

    Kassak, Esme

    2008-01-01

    Politseiameti kriminaalosakonna juhataja Krista Aas, Agentuuride Royal Service ja Spring Advertising tegevjuht Rika Soopa, Eesti Päevalehe sporditoimetuse juhataja Kristi Vahemaa, Hansapanga IT infrastruktuuri projektide osakonna juhataja Anna Lizunova, Skype Eesti veebitiimi juht Elina Kostabi valdavalt meestest koosneva kollektiivi juhtimisest. Lisad: Hillary Clinton, Condoleezza Rice, Segolene Royal. Küsimusele, millised on naisjuhtide tugevused, vastavad Mart Mikk, Aavo Kokk, Ants Lusti, Margus Alviste ja Tiit Paananen. Küsimusele, mida arvata mehelikest naistest, vastavad Mart Mikk, Ants Lusti ja Margus Alviste

  10. Naised, kes juhivad mehi / Esme Kassak ; interv. Esme Kassak

    Index Scriptorium Estoniae

    Kassak, Esme

    2008-01-01

    Politseiameti kriminaalosakonna juhataja Krista Aas, Agentuuride Royal Service ja Spring Advertising tegevjuht Rika Soopa, Eesti Päevalehe sporditoimetuse juhataja Kristi Vahemaa, Hansapanga IT infrastruktuuri projektide osakonna juhataja Anna Lizunova, Skype Eesti veebitiimi juht Elina Kostabi valdavalt meestest koosneva kollektiivi juhtimisest. Lisad: Hillary Clinton, Condoleezza Rice, Segolene Royal. Küsimusele, millised on naisjuhtide tugevused, vastavad Mart Mikk, Aavo Kokk, Ants Lusti, Margus Alviste ja Tiit Paananen. Küsimusele, mida arvata mehelikest naistest, vastavad Mart Mikk, Ants Lusti ja Margus Alviste

  11. Magnetotransmission of unpolarized infrared radiation in Hg1 - x Cd x Cr2Se4 (0 ≤ x ≤ 1) single crystals studied using the voigt geometry

    Science.gov (United States)

    Sukhorukov, Yu. P.; Telegin, A. V.; Bebenin, N. G.; Patrakov, E. I.; Naumov, S. V.; Fedorov, V. A.; Menshchikova, T. K.

    2013-11-01

    The features characterizing the behavior of magnetotransmission in Hg1 - x Cd x Cr2Se4 single crystals are studied using natural light in the infrared spectral range. The relation between the changes in the magneto-optical properties and in the electron band structure is found. It is shown that the most significant changes in the magnetotransmission spectrum and the band structure occur within the 0.1 < x < 0.25 range.

  12. Chromosomal localization of 45S rDNA, sex-specific C values, and heterochromatin distribution in Coccinia grandis (L.) Voigt.

    Science.gov (United States)

    Bhowmick, Biplab Kumar; Yamamoto, Masashi; Jha, Sumita

    2016-01-01

    Coccinia grandis is a widely distributed dioecious cucurbit in India, with heteromorphic sex chromosomes and X-Y sex determination mode. The present study aids in the cytogenetic characterization of four native populations of this plant employing distribution patterns of 45S rDNA on chromosomes and guanine-cytosine (GC)-rich heterochromatin in the genome coupled with flow cytometric determination of genome sizes. Existence of four nucleolar chromosomes could be confirmed by the presence of four telomeric 45S rDNA signals in both male and female plants. All four 45S rDNA sites are rich in heterochromatin evident from the co-localization of telomeric chromomycin A (CMA)(+ve) signals. The size of 45S rDNA signal was found to differ between the homologues of one nucleolar chromosome pair. The distribution of heterochromatin is found to differ among the male and female populations. The average GC-rich heterochromatin content of male and female populations is 23.27 and 29.86 %, respectively. Moreover, the male plants have a genome size of 0.92 pg/2C while the female plants have a size of 0.73 pg/2C, reflecting a huge genomic divergence between the genders. The great variation in genome size is owing to the presence of Y chromosome in the male populations, playing a multifaceted role in sexual divergence in C. grandis.

  13. Cyber Professionals in the Military and Industry-Partnering in Defense of the Nation: A Conversation between Maj Gen Suzanne Vautrinot, Commander, Twenty-Fourth Air Force, and Mr. Charles Beard, Chief Information Officer, Science Applications International Corporation

    Science.gov (United States)

    2013-01-01

    military controlled, across several different networks, including foreign systems, making it critical to establish relationships with com- mercial...level, you had to go beyond awareness. Peo- ple had to get on board, understand the codependency , and see its benefit to the individual. Having the

  14. "Infinitely CERN Memories from 50 years of research" CERN and Editions Suzanne Hurter are publishing a beautiful book, "Infinitely CERN", to commemorate the human and scientific adventure of CERN.

    CERN Multimedia

    Maximilien Brice

    2004-01-01

    The book tells the history of CERN through the voices of those who lived it. Highlights such as scientific events, technical achievements and CERN's role as an international organization in Geneva, are recalled chronologically by people who witnessed them: administrators, engineers and physicists, including Georges Charpak, Carlo Rubbia and Simon van der Meer, who received the Nobel Prize in physics for discoveries made at CERN.

  15. "Infinitely CERN Memories from 50 years of research" CERN and Editions Suzanne Hurter are publishing a beautiful book, "Infinitely CERN", to commemorate the human and scientific adventure of CERN.

    CERN Document Server

    Maximilien Brice

    2004-01-01

    The book tells the history of CERN through the voices of those who lived it. Highlights such as scientific events, technical achievements and CERN's role as an international organization in Geneva, are recalled chronologically by people who witnessed them: administrators, engineers and physicists, including Georges Charpak, Carlo Rubbia and Simon van der Meer, who received the Nobel Prize in physics for discoveries made at CERN.

  16. Contemporary Art: 1989 to the Present. Edited by Alexander Dumbadze and Suzanne Hudson. Wiley-Blackwell, Chichester, West Sussex, UK, 2013; 512 Pages. Price £22.99, €27.60, ISBN 978-1-4443-3866-9

    Directory of Open Access Journals (Sweden)

    Shu-Kun Lin

    2013-02-01

    Full Text Available An engaging account of today’s contemporary art world that features original articles by leading international art historians, critics, curators, and artists, introducing varied perspectives on the most important debates and discussions happening around the world.

  17. Contemporary Art: 1989 to the Present. Edited by Alexander Dumbadze and Suzanne Hudson. Wiley-Blackwell, Chichester, West Sussex, UK, 2013; 512 Pages. Price £22.99, €27.60, ISBN 978-1-4443-3866-9

    OpenAIRE

    Shu-Kun Lin

    2013-01-01

    An engaging account of today’s contemporary art world that features original articles by leading international art historians, critics, curators, and artists, introducing varied perspectives on the most important debates and discussions happening around the world.

  18. Discovery: Faculty Publications and Presentations, Fiscal Year 1981

    Science.gov (United States)

    1982-01-01

    bibliography of secondary sources and brief biography . 64 J/Department of English g. ’Werewolves and Vampires in Literature and Film." USAF Academy...overshadow even the most lusty of modem films. Additionally. I pointed out that despite Don Giovanni’s ultimate demise, Mozart does not pass moral

  19. Räägi nii, et pisarad voolaksid! Kuidas saab inimesi oma lugude abil juhtida / Taivo Paju

    Index Scriptorium Estoniae

    Paju, Taivo, 1968-

    2011-01-01

    Kuulajat puudutavate lugude rääkimine. Kuidas toimub lugude loomine inimese ajus. Termin "corporate storytelling". Noppeid Pärnu turunduskonverentsi firmalugude võisturääkimiselt, kus jutustasid Ants Lusti, Marika Pärn, Piret Järvan ja Matts Heijbel

  20. 读书(英文)

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    In the Pond 《池塘里》 Author: Ha Jin Publisher: Vintage "Though art and politics figure in the action, In the Pond is first and foremost a comedy-naughty, lusty, raucously entertaining. Ha Jin's language echoes working-class Chinese at its rough, bawdy best."-New York Times Book Review.

  1. Akadeemia kuues lend mängib "Kilplasi"

    Index Scriptorium Estoniae

    2006-01-01

    Papa Kreutzwaldi Õueteatris Lauluisa muuseumi õuel esietendub 7. juulil Tartu Ülikooli Viljandi Kultuuriakadeemia kuuenda lennu teatritudengite lusti- ja laulumäng "Kilplased" F. R. Kreutzwaldi juttude ainetel, lavastaja Katri Aaslav-Tepandi. Edasi rännatakse koos Rändteatriga mööda Eestimaad

  2. Data Integration: Charting a Path Forward to 2035

    Science.gov (United States)

    2011-02-14

    Force Base, OH. Eick , M. Andrew and Suzanne Yoakum-Stover. ―Fixing Intel and Operationalizing Data – The Data & Processing Syndicate...Telescope. http://www.worldwidetelescope.org (accessed 26 Sep 2010). Yoakum-Stover, Suzanne and M. Andrew Eick . ―NGA Cloud School,‖ Briefing, 23 March...York, NY: Viking Publishing, Sep 2005), Kindle location 716-29. 4 M. Andrew Eick and Suzanne Yoakum-Stover, ―Fixing Intel and Operationalizing Data

  3. PERS DALAM WACANA HUKUM (Kajian tentang Kebebasan, Tanggungjawab, dan Deviasi Pers dalam Perspektif Hukum Islam dan Hukum Positif di Indonesia)

    OpenAIRE

    Idri Idri

    2012-01-01

    Abstract: Press takes an important role in expanding the country development, lastly it is not only lusty, free, and responsible but also it functions as an objective information disseminator, constrcutive social controll agent, public aspiration supplier, and to broaden public communication and participation. In brief, it needs to develop positive and harmony  interaction among press, government, and society. The freedom of press in extending information to public has been one of the realiza...

  4. 76 FR 3146 - Submission for OMB Review; Comment Request; The Atherosclerosis Risk in Communities Study (ARIC)

    Science.gov (United States)

    2011-01-19

    ... if received within 30 days of the date of this publication. Suzanne Freeman, NHLBI Project Clearance Liaison, National Institutes of Health. Michael Lauer, Director, DCVS, National Institutes of...

  5. 75 FR 25863 - Proposed Collection; Comment Request; The Framingham Heart Study (FHS)

    Science.gov (United States)

    2010-05-10

    ... the date of this publication. Dated: April 28, 2010. Suzanne Freeman, NHLBI Project Clearance Liaison, National Institutes of Health. Michael Lauer, Director, DCVS, National Institutes of Health. BILLING...

  6. 75 FR 3237 - Proposed Collection; Comment Request; Women's Health Initiative Observational Study

    Science.gov (United States)

    2010-01-20

    .... Dated: January 4, 2010. Michael S. Lauer, Director, Division of Cardiovascular Science, NHLBI, National Institutes of Health. Dated: January 6, 2010. Suzanne Freeman, Chief, FOIA, NHLBI, National Institutes...

  7. From Silence to Voice: What Nurses Know and Must Communicate to the Public Buresh Bernice and Gordon Suzanne From Silence to Voice: What Nurses Know and Must Communicate to the Public 304pp £12.50 Cornell University Press Third edition 9780801478734 0801478731 [Formula: see text].

    Science.gov (United States)

    2014-10-30

    WITH OUR profession coming under attack on many fronts and our reputation as nurses tarnished, this book should be required reading for all nurses. It offers the tools that could help us gain the resources and respect that we deserve.

  8. Beyond the boys' club: strategies for achieving career success as a woman working in a male-dominated field Suzanne Doyle-Morris Beyond the boys' club: strategies for achieving career success as a woman working in a male-dominated field Wit and Wisdom Press £13.99 298pp 9780956268808 0956268803 [Formula: see text].

    Science.gov (United States)

    2010-02-03

    ALTHOUGH THIS book is not intended for any specific group of healthcare professionals, its subject matter, including mentorship, the need to master presentation skills such as public speaking, and why it is good to share workplace success, should all be of interest to nurses.

  9. Pisikesed jalad tatsavad kaugele / Siret Paju

    Index Scriptorium Estoniae

    Paju, Siret, 1982-

    2006-01-01

    Rootsi laste- ja noorteteatri festivalist Londonis 11. - 29. X 2006, mis on eelhäälestus Rootsis 2007. aasta noorte kultuuri aastale. Lasteteatris Unicorn toimunud diskussioonist teemal "Tabud lasteteatris", osalejateks Suzanne Osten, Henning Mankell, Philip Pullmann. Lühidalt kahest etendusest: "Tüdruk, ema ja prügi" - lavastaja Suzanne Osten ja "Kassi teekond" - esitas Teater Tittut

  10. Raise your game how to build on your successes to achieve transformational results

    CERN Document Server

    Hazelton, Suzanne

    2012-01-01

    Suzanne has a deep desire to help others "be the best they can", which inspires her to bring her mix of business experience, coaching and training to a wider audience. It is Suzanne's firm desire that readers discover and use these simple techniques, in order to start their upward spiral to success and fulfilment. Suzanne is a coach specialising in behavioural change within business. Suzanne has trained or coached more than 3500 people either in small group sessions or in one-to-one coaching and regularly delivers conference workshops. Suzanne has worked nationally and internationally. Her interest in professional development spans two decades. After a first degree in Industrial and Business Systems and an early career in IT, which encompassed project and people management, Suzanne specialised in developing and delivering personal development training courses at IBM, before founding her own business. Suzanne is a practitioner in a number of inter-related approaches such as: NLP (MPrac), Firo-B, and the Myers-...

  11. Drag queens' use of language and the performance of blurred gendered and racial identities.

    Science.gov (United States)

    Mann, Stephen L

    2011-01-01

    Building on Barrett (1998), this study provides a sociolinguistic analysis of the language used by Suzanne, a European-American drag queen, during her on-stage performance in the southeastern United States. Suzanne uses wigs and costumes to portray a female character on stage, but never hides the fact that she is biologically male. She is also a member of a predominantly African-American cast. Through her creative use of linguistic features such as stylemixing (i.e., the use of linguistic features shared across multiple language varieties) and expletives, Suzanne is able to perform an identity that frequently blurs gender and racial lines.

  12. Raamat eesti naiste saatustest / Ülo Ignats

    Index Scriptorium Estoniae

    Ignats, Ülo, 1951-2011

    2006-01-01

    rets. rmt.: Carrying Linda´s stones: an anthology of Estonian women´s life stories/ editors Suzanne Stiver Lie ...[ et al.]; foreword by H. E. Aldona Wos. Tallinn: Tallinn University Press, 2006. 600 lk. : ill, kaart

  13. Tõnu Kaalep kuulab plaate,mille autoriks on naised / Tõnu Kaalep

    Index Scriptorium Estoniae

    Kaalep, Tõnu, 1966-

    2001-01-01

    Heliplaatidest: Tori Amos "Strange Little Girls", Suzanne Vega "Songs in Red and Gray", Tracy Chapman "Collection", Sandy Dillon & Hector Zazou "12 (Las Vegas is Cursed)", Anja Garbarek "Smiling & Waving"

  14. Pop / Bertil Tüvi

    Index Scriptorium Estoniae

    Tüvi, Bertil

    2007-01-01

    Heliplaatidest: Bonde Do Role "With Lasers", Cribs "Men's Needs Women's Needs Whatever", Dylan Donkin "Food for Thoughtlessness", Dream Theater "Systematic Chaos", Smashing Pumpkins "Zeitgeist", Suzanne Vega "Beauty and Crime", The Beach Boys "The Warmth Of The Sun"

  15. Tõnu Kaalep kuulab plaate,mille autoriks on naised / Tõnu Kaalep

    Index Scriptorium Estoniae

    Kaalep, Tõnu, 1966-

    2001-01-01

    Heliplaatidest: Tori Amos "Strange Little Girls", Suzanne Vega "Songs in Red and Gray", Tracy Chapman "Collection", Sandy Dillon & Hector Zazou "12 (Las Vegas is Cursed)", Anja Garbarek "Smiling & Waving"

  16. 75 FR 17744 - Submission for OMB Review; Comment Request; the Jackson Heart Study (JHS)

    Science.gov (United States)

    2010-04-07

    ... having their full effect if received within 30 days of the date of this publication. Suzanne Freeman, NHLBI Project Clearance Liaison, National Institutes of Health. Michael Lauer, Director, DCVS,...

  17. 75 FR 54886 - Submission for OMB Review; Comment Request; the Framingham Heart Study (FHS)

    Science.gov (United States)

    2010-09-09

    ... this publication. Dated: September 1, 2010. Suzanne Freeman, NHLBI Project Clearance Liaison, National Institutes of Health. Michael Lauer, Director, DCVS, National Institutes of Health. BILLING CODE 4140-01-P...

  18. 75 FR 7482 - Submission for OMB Review; Comment Request; The Atherosclerosis Risk in Communities Study (ARIC)

    Science.gov (United States)

    2010-02-19

    ... if received within 30 days of the date of this publication. Dated: January 29, 2010. Suzanne Freeman, NHLBI Project Clearance Liaison, National Institutes of Health. Michael Lauer, Director, DCVS,...

  19. Child fostering in West Africa: New perspectives on theory and practices

    NARCIS (Netherlands)

    Alber, E.; Martin, J.; Notermans, C.D.

    2013-01-01

    Introduction / Erdmute Alber, Jeannett Martin and Catrien Notermans -- A framework for the analysis of parent roles / Esther Goody -- Adoption, fosterage and marriage / Suzanne Lallemand -- The transfer of belonging: theories on child fostering in West Africa reviewed / Erdmute Alber -- Experiencing

  20. Pop / Bertil Tüvi

    Index Scriptorium Estoniae

    Tüvi, Bertil

    2007-01-01

    Heliplaatidest: Bonde Do Role "With Lasers", Cribs "Men's Needs Women's Needs Whatever", Dylan Donkin "Food for Thoughtlessness", Dream Theater "Systematic Chaos", Smashing Pumpkins "Zeitgeist", Suzanne Vega "Beauty and Crime", The Beach Boys "The Warmth Of The Sun"

  1. Distributed Wind Cost Reduction: Learning from Solar

    Energy Technology Data Exchange (ETDEWEB)

    Tegen, Suzanne

    2016-02-23

    The distributed wind energy industry can learn several lessons from the solar industry regarding reducing soft costs. Suzanne Tegen presented this overview at the 2016 Distributed Wind Energy Association Business Conference in Washington, D.C., on February 23, 2016.

  2. Book received: German Orientalism in the Age of Empire: Religion, Race and Scholarship,

    Directory of Open Access Journals (Sweden)

    Suzanne Marchand

    2010-06-01

    Full Text Available Suzanne Marchand, German Orientalism in the Age of Empire: Religion, Race and Scholarship, Cambridge: Cambridge University Press 2009; including sample from introductory chapter 2-SM/1

  3. Raamat eesti naiste saatustest / Ülo Ignats

    Index Scriptorium Estoniae

    Ignats, Ülo, 1951-2011

    2006-01-01

    rets. rmt.: Carrying Linda´s stones: an anthology of Estonian women´s life stories/ editors Suzanne Stiver Lie ...[ et al.]; foreword by H. E. Aldona Wos. Tallinn: Tallinn University Press, 2006. 600 lk. : ill, kaart

  4. The Collapse of the Democratic People’s Republic of Korea: A Multilateral Approach to Northeast Asia

    Science.gov (United States)

    2009-04-01

    control of Korea has been at the forefront, widely viewed as a dagger pointed at Japan’s heart as well as a bridge to the Asian mainland. See Samuel ...North Korea. 16 Tovar , Suzanne M. How Will External Powers Affect Korean Reunification? Monterey, CA: Naval Postgraduate School, 2005. 81 17...and Korean Unification Strategies. Seoul, Korea: Kyungnam University Press, 1997. Tovar , Suzanne M. How Will External Powers Affect Korean

  5. Focus on global quail sector development and quail's immunization program%全球鹌鹑产业发展概述

    Institute of Scientific and Technical Information of China (English)

    陈连颐

    2009-01-01

    鹌鹑与鸵鸟、鹧鸪、雉鸡等以及其它一些禽类习惯上称为特禽,这些禽类提供的蛋、肉被称为特禽产品或称作“奢侈”禽产品(lusty poultry products)。鹌鹑蛋相比于其它特禽,市场消费较多,但是仍不足以与鸡蛋相比,特禽产品消费在一些地区比较流行,有时在某些国家地区还具有特殊的消费意义,因而,给予鹌鹑行业一些恰当的关注是应该的。

  6. Ocean-Wave Coupled Modeling in COAMPS-TC: A Study of Hurricane Ivan (2004)

    Science.gov (United States)

    2013-08-15

    Hurricane Ivan (2004) 0603207N 73-9270-01-5 Travis A. Smith, Sue Chen, Timothy Campbell, Paul Martin, W. Erick Rogers, Sasa Gabersek, David Wang, Suzanne...Timothy Campbell a, Paul Martin a, W. Erick Rogers a, Saša Gaberšek b, David Wang a, Suzanne Carroll c, Richard Allard a aNaval Research Laboratory...the shelf currents followed Ekman dynamics with overlapping surface and bottom layers during Ivan’s approach and transitioned to a dominant surface

  7. 75 FR 4621 - Qualification of Drivers; Exemption Renewals; Vision

    Science.gov (United States)

    2010-01-28

    ... Ronald G. Austin, Rickey C. Dalton, Martiniano L. Espinosa, James G. LaBair, Dennis A. Leschke, Lonnie Lomax, Jr., Eugene C. Murphy, Carl W. Skinner, Jr., John H. Voigts and Daniel G. Wilson. In accordance...

  8. nmrfit

    Energy Technology Data Exchange (ETDEWEB)

    2017-09-01

    Nmrfit reads the output from a nuclear magnetic resonance (NMR) experiment and, through a number of intuitive API calls, produces a least-squares fit of Voigt-function approximations via particle swarm optimization.

  9. Weak power law rheology of soft glassy and gelled materials

    CERN Document Server

    Patricio, Pedro

    2015-01-01

    We make a parallel excursion to the generalised Maxwell and Kelvin-Voigt models to find which general conditions may lead to the weak power law behaviours of the elastic and viscous moduli, $G'(w)\\sim G''(w)\\sim w^\\alpha$, with $0 y\\approx \\alpha$ and $y> x\\approx \\alpha$ for respectively the generalised Maxwell and Kelvin-Voigt models. Beyond this region, we find very different and interesting exponents.

  10. Algorithm of constructing hybrid effective modules for elastic isotropic composites

    Science.gov (United States)

    Svetashkov, A. A.; Miciński, J.; Kupriyanov, N. A.; Barashkov, V. N.; Lushnikov, A. V.

    2017-02-01

    The algorithm of constructing of new effective elastic characteristics of two-component composites based on the superposition of the models of Reiss and Voigt, Hashin and Strikman, as well as models of the geometric average for effective modules. These effective characteristics are inside forks Voigt and Reiss. Additionally, the calculations of the stress-strain state of composite structures with new effective characteristics give more accurate prediction than classical models do.

  11. Clarification of the Hashin-Shtrikman bounds on the effective elastic moduli of polycrystals with hexagonal, trigonal, and tetragonal symmetries

    Science.gov (United States)

    Watt, J.P.; Peselnick, L.

    1980-01-01

    Bounds on the effective elastic moduli of randomly oriented aggregates of hexagonal, trigonal, and tetragonal crystals are derived using the variational principles of Hashin and Shtrikman. The bounds are considerably narrower than the widely used Voigt and Reuss bounds. The Voigt-Reuss-Hill average lies within the Hashin-Shtrikman bounds in nearly all cases. Previous bounds of Peselnick and Meister are shown to be special cases of the present results.

  12. Sõber raamat

    Index Scriptorium Estoniae

    1997-01-01

    Raamatukaupluses EURO Publications pakutavate raamatute tutvustus. James Davidson, The Complete Home Lightning Book, 1997 Inglismaa ; Candace Ord Manroe. Uncluttered : Storage Room by Room ; Ruth Pretty. The Ultimate Interior Designer, Inglismaa 1997 ; Judith ja Martin Miller. Period Finishes and Effects, Londoni 1992 ; Suzanne Slesin, Stafford Cliff, Daniel Rozensztroch. Spanish Style, esmatrükk 1990.

  13. Ilmus kogumik eesti naiste elulugusid inglise keeles

    Index Scriptorium Estoniae

    2006-01-01

    Carrying Linda's stones : an anthology of Estonian women's life stories / editors: Suzanne Stiver Lie, Lynda Malik, Ilvi Jõe-Cannon, Rutt Hinrikus ; foreword by H.E. Aldona Wos. Tallinn : Tallinn University Press, 2006. Sisaldab Elin Toona jt. elulugusid. Vt. ka SL Õhtuleht, 30. sept., lk. 27

  14. ROLES OF EPIDERMAL GROWTH FACTOR (EGF) AND TRANSFORMING GROWTH FACTOR-ALPHA (TGF-A) IN MEDIATION OF DIOXIN (TCDD)-INDUCED DELAYS IN DEVELOPMENT OF THE MOUSE MAMMARY GLAND

    Science.gov (United States)

    Roles of Epidermal Growth Factor (EGF) and Transforming Growth Factor-alpha (TGF-a) in Mediation of Dioxin (TCDD)-Induced Delays in Development of the Mouse Mammary Gland.Suzanne E. Fenton, Barbara Abbott, Lamont Bryant, and Angela Buckalew. U.S. EPA, NHEERL, Reproductive Tox...

  15. Competencies for Librarians. Proceedings from the 1985 Spring Meeting of the Nebraska Library Association: College and University Section (Omaha, Nebraska, April 26, 1985).

    Science.gov (United States)

    Krzywkowski, Valerie I., Ed.

    Based on the conference theme, "Competencies for Librarians," papers presented at the 1985 meeting of the association include: (1) "Planning a Library-Based Public Access Microcomputer Facility" (Suzanne Kehm); (2) "Processing and Circulating Microcomputer Software in the Academic Library: A Sharing Session" (Jan…

  16. Responsible Grammar Rebels: Using the Hunger Games Trilogy to Teach the Intentional Sentence Fragment

    Science.gov (United States)

    Simmons, Amber M.

    2016-01-01

    Building off of students' interest in popular apocalyptic/dystopian literature, this article explores how passages from Suzanne Collins's "The Hunger Games" trilogy aided in teaching students how to successfully rebel against traditional grammar rules, looking at fragments as intentional stylistic choices. Employing the values of…

  17. Financiële crises in de media

    NARCIS (Netherlands)

    Scheijen, Suzanne van

    2015-01-01

    abstractSuzanne van Scheijen Financial crises in the media. A study of the framing of news on financial crises in Dutch newspapers Dutch newspapers have extensively compared the initial period of the financial crisis of 1929 to that of 2008 as well as their corresponding characteristics. This articl

  18. Correction to Dittmar, Halliwell, and Ive (2006)

    Science.gov (United States)

    Dittmar, Helga; Halliwell, Emma; Ive, Suzanne

    2006-01-01

    Reports an error in "Does Barbie make girls want to be thin? The effect of experimental exposure to images of dolls on the body image of 5- to 8-year-old girls" by Helga Dittmar, Emma Halliwell and Suzanne Ive ("Developmental Psychology," 2006 Mar, Vol 42[2], 283-292). A substantive error occurs in the Body shape dissatisfaction section on page…

  19. Operations Events Census Report: Volume III, 1975-1980. Sanitized Version.

    Science.gov (United States)

    1985-04-01

    JULIO S. 2 0599 BARRETT, LARRY K. 2 0837 BARRETT, SUZANNE J. 2 0638 BARRETT, THOMAS J. 2 0602 BARRETT, WILLIAM H. 2 0680 BASH, SUSAN C. 2 0602 BASSETT...0636 HALPIN, PATRICK N. 2 0599 HAMBY, VERN 2 0679 HAMILTON, THOMAS K. 2 0837 HAMMIL, DANIEL E. 2 0923 HAMMOND, JOHN B. 2 0679 HAMMOND, RICHARD C. 2

  20. Cognitive-Affective Predictors of the Uptake & Sustained Adherence to Lymphedema Symptom Minimization Practices in Breast Cancer Survivors

    Science.gov (United States)

    2007-08-01

    Uptake of, & Sustained Adherence to Lymphedema Symptom Minimization Practices in Breast Cancer Survivors PRINCIPAL INVESTIGATOR: Suzanne M. Miller...SUBTITLE 5a. CONTRACT NUMBER Cognitive-Affective Predictors of the Uptake of, & Sustained Adherence to Lymphedema Symptom Minimization Practices in...SUPPLEMENTARY NOTES 14. ABSTRACT Approximately 20-30% of women develop lymphedema (LE) following breast cancer treatment. Effective symptom management

  1. A Battle Reconsidered: Second Thoughts on Book Censorship and Conservative Parents

    Science.gov (United States)

    Kauer, Suzanne M.

    2008-01-01

    Suzanne M. Kauer believes we must honor all voices in the discussion of what books students should read; she refuses to simplify the issue of censorship by dismissing the multifaceted concerns parents have for saying no to certain books. Kauer advocates doing more listening--asking parents questions to better understand their perspectives--and…

  2. Tracks: EPHT Massachusetts Case Study

    Centers for Disease Control (CDC) Podcasts

    2009-07-20

    This podcast highlights the Massachusetts Environmental Public Health Tracking Network and features commentary from Massachusetts Department of Public Health Associate Health Commissioner Suzanne Condon.  Created: 7/20/2009 by Centers for Disease Control and Prevention (CDC).   Date Released: 7/20/2009.

  3. 75 FR 49458 - Trade Adjustment Assistance for Farmers

    Science.gov (United States)

    2010-08-13

    ... Foreign Agricultural Service Trade Adjustment Assistance for Farmers AGENCY: Foreign Agricultural Service.... FOR FURTHER INFORMATION CONTACT: Trade Adjustment Assistance for Farmers Program Staff, FAS, USDA by... TAA for Farmers' Web site: http://www.fas.usda.gov/itp/taa . Dated: August 3, 2010. Suzanne...

  4. PROLACTIN-INDUCED TYROSINE PHOSPHORYLATION, ACTIVATION AND RECEPTOR ASSOCIATION OF FOCAL ADHESION KINASE (FAK) IN MAMMARY EPITHELIAL CELLS

    Science.gov (United States)

    Prolactin-Induced Tyrosine Phosphorylation, Activation and ReceptorAssociation of Focal Adhesion Kinase (FAK) in Mammary Epithelial Cells. Suzanne E. Fenton1 and Lewis G. Sheffield2. 1U.S. Environmental ProtectionAgency, MD-72, Research Triangle Park, NC 27711, and

  5. 75 FR 57974 - Senior Executive Service Performance Review Board

    Science.gov (United States)

    2010-09-23

    ..., Janice Aytes, Michael L. Bacon, Roxana Baldwin, William D. Baroukh, Nader Barr, Suzanne E. Bathurst... Carwile III, William L. Chaparro, James M. Chavez, Richard Chuang, Theodore Cipicchio, Domenico C. Cohn..., Charles N. DiFalco, Frank Dinkins, James A. Dong, Norman S. Doyle, Christopher Duffy, Patricia M....

  6. The Games People Play: Information and Media Literacies in the Hunger Games Trilogy

    Science.gov (United States)

    Latham, Don; Hollister, Jonathan M.

    2014-01-01

    Katniss Everdeen, the narrator and protagonist of Suzanne Collins' Hunger Games Trilogy, survives the grueling ordeal of forced participation in two games to the death through both physical prowess and mental agility. Both within and outside of the Games, she demonstrates information and media literacies. By becoming adept at interpreting and…

  7. The Games People Play: Information and Media Literacies in the Hunger Games Trilogy

    Science.gov (United States)

    Latham, Don; Hollister, Jonathan M.

    2014-01-01

    Katniss Everdeen, the narrator and protagonist of Suzanne Collins' Hunger Games Trilogy, survives the grueling ordeal of forced participation in two games to the death through both physical prowess and mental agility. Both within and outside of the Games, she demonstrates information and media literacies. By becoming adept at interpreting and…

  8. Asthma Awareness (A Cup of Health with CDC)

    Centers for Disease Control (CDC) Podcasts

    2015-04-30

    More than 22 million Americans have asthma, which is caused by a contraction of the airways in the lungs. In this podcast, Dr. Suzanne Beavers discusses ways to control and prevent asthma attacks.  Created: 4/30/2015 by MMWR.   Date Released: 4/30/2015.

  9. Shuffling the Deck To Ensure Fairness in Dealing: A Commentary on Some Issues of Equity and Mathematics Education from the Perspective of the QUASAR Project.

    Science.gov (United States)

    Silver, Edward A.

    This paper is a reaction to a plenary address, "Fairness in Dealing: Diversity, Psychology, and Mathematics Education" by Suzanne Damarin (SE 057 179). The issues of intentionality, institutional and instructional practices, identity development, and assessment are addressed in regard to the Quantitative Understanding: Amplifying Student…

  10. Mapping Panem

    Science.gov (United States)

    Painter, Judith

    2012-01-01

    This lesson plan is based on Suzanne Collins's book, "The Hunger Games." Katniss and Gale know about District 12 and the surrounding woods. Additionally, from television coverage, they know that there are twelve districts and the Capitol. District 13 used to exist until the rebellion. But where are these districts now that the geography…

  11. Fighting for America: So Where’s the Divide?

    Science.gov (United States)

    2012-02-22

    michael-cdesch/bush-and-the- generals.html; Internet; (accessed September 22, 2011). 43 Suzanne C. Nielsen and Don M. Snider, American Civil-Military...F. McCarthy, Jerry M. Solinger, Linda J. Demaine, Jefferson P. Marquis, Brett Steele, The Civil Military Gap in the United States: Does it Exist

  12. Tailored Communication to Enhance Adaptation Across the Breast Cancer Spectrum

    Science.gov (United States)

    2007-10-01

    art care for women at familial risk for breast and ovarian cancer and is continuing to work collaboratively with BCE. Catia Ghinelli, Ph.D...Program as a consultant on the various projects within the BCE. Miller, Suzanne, Ph.D. 51 o Catia Ghinelli, Ph.D., joined the Behavioral

  13. Responsible Grammar Rebels: Using the Hunger Games Trilogy to Teach the Intentional Sentence Fragment

    Science.gov (United States)

    Simmons, Amber M.

    2016-01-01

    Building off of students' interest in popular apocalyptic/dystopian literature, this article explores how passages from Suzanne Collins's "The Hunger Games" trilogy aided in teaching students how to successfully rebel against traditional grammar rules, looking at fragments as intentional stylistic choices. Employing the values of…

  14. Centralized Library Services for Audiovisual Media. AV in Action 4.

    Science.gov (United States)

    Nederlands Bibliotheek en Lektuur Centrum, The Hague (Netherlands).

    Designed to provide assistance to countries in developing centralized services to their libraries for nonbook materials, this pamphlet contains examples from five countries that have succeeded in establishing such services. Those examples include: (1) "The Central Library Service for AV-Materials in Denmark" (Suzanne Hemmeth…

  15. 77 FR 37458 - Self-Regulatory Organizations; Financial Industry Regulatory Authority, Inc.; Notice of Filing of...

    Science.gov (United States)

    2012-06-21

    ... from Suzanne H. Shatto, dated October 20, 2011 (``Shatto Letter''); Letter from Naphtali M. Hamlet, dated October 21, 2011 (``Hamlet Letter); Letter from Daniel Zinn, General Counsel, OTC Markets Group... Shatto Letter. \\36\\ See Hamlet Letter. Knight expressed the view that the proposal could have the...

  16. Between Mere Tolerance and Robust Respect: Mutuality as a Basis for Civic Education in Pluralist Democracies

    Science.gov (United States)

    Rosenblith, Suzanne; Bindewald, Benjamin

    2014-01-01

    This essay by Suzanne Rosenblith and Benjamin Bindewald is motivated by the question of how do those who value civic liberalism give the religiously orthodox a reason to engage in pluralist democratic deliberations in a manner that does not allow intolerance to undermine the foundations of liberal democracy. Introducing the idea of tolerance as…

  17. Practical User Experience Design for School Libraries: 5 Tips for Improving Day-to-Day Life for Your Users...and You!

    Science.gov (United States)

    Sannwald, Suzanne

    2017-01-01

    Suzanne Sannwald is the school librarian at West Hills High School in the Grossmont Union High School District, in San Diego's East County region. While working for a couple of years in a corporate setting prior to her current position, Sannwald learned about everything from organizational development and leadership to marketing and customer…

  18. Social and cultural activities

    CERN Multimedia

    Clubs

    Club news : Dancing Club, Scuba Club, Croquet and Lawn Bowls Club, Artemusa, Orienteering Club , Concerts Club, Running Club. Exhibition : Du détail à l'abstrait... ou le bois dans tous ses états (Marie-Suzanne Vacher). Conference : Think differently (Saba Lidete Imru).

  19. Alliances in "The Hunger Games"

    Science.gov (United States)

    Painter, Judith

    2012-01-01

    This lesson plan is based on "The Hunger Games" by Suzanne Collins. Characters in "The Hunger Games" form alliances both inside and outside the arena. Katniss and Gale form alliances within District 12. Katniss, Peeta, and the other tributes form alliances for a variety of reasons during the Games. An alliance means that "someone's got your back"…

  20. Class on Fire: Using the Hunger Games Trilogy to Encourage Social Action

    Science.gov (United States)

    Simmons, Amber M.

    2012-01-01

    This article explores ways to utilize students' interest in fantasy literature to support critical literacy. Focusing on Suzanne Collins's The Hunger Games series (2008, 2009, 2010), the author addresses how elements of the trilogy relate to violent acts in our world, helping student understand that violence and brutality toward children is not…

  1. 78 FR 42027 - Proposed Amendment To Advance Notice of Proposed Rulemaking for Pension Benefit Statements

    Science.gov (United States)

    2013-07-15

    ... and can be retrieved by most Internet search engines. FOR FURTHER INFORMATION CONTACT: Suzanne Adelman... Benefits Security Administration 29 CFR Part 2520 RIN 1210-AB20 Proposed Amendment To Advance Notice of.... Department of Labor. ACTION: Notice of Extension of Comment Period for Advance Notice of Proposed Rulemaking...

  2. Female Focalizers and Masculine Ideals: Gender as Performance in Twilight and the Hunger Games

    Science.gov (United States)

    Guanio-Uluru, Lykke

    2016-01-01

    Stephenie Meyer's "Twilight" series (2005-2008) and Suzanne Collins' "The Hunger Games" series (2008-2010) have been hugely successful and influential texts, both as best-selling literary works and as action movie franchises. (To avoid confusion, "Twilight" and "The Hunger Games" in this essay refer to the…

  3. "The Hunger Games" and Project-Based Learning

    Science.gov (United States)

    Educational Horizons, 2013

    2013-01-01

    Mary Mobley teaches English and Michael Chambers teaches world history at Manor New Technology High School, a STEM school, in Manor, Texas. In this article, they talk about how they used "The Hunger Games" by Suzanne Collins to teach their students about forms of government between World War I and World War II, and "Edutopia"…

  4. Proceedings of the Symposium on Psychology in the Department of Defense (11th) Held in Colorado Springs, Colorado on 13-15 April 1988

    Science.gov (United States)

    1988-04-15

    and military : - agencies, however, express concerns about separation, childcare, deployment, maternity / paternity leave, discrimination, and career... adolescence marked by deep feelings of inadequacy, inferiority, and a sense of rejection by parents and significant others (page 21). 478p N ~U...TO THE SINAI: AN ETHNOGRAPHIC APPROACH" Suzanne Wood Katharine Gravino ...... .................... ... 451 "TYPOLOGY OF ARMY FAMILIES: COPING STYLES

  5. Ready, Willing, and Able: A Developmental Approach to College Access and Success

    Science.gov (United States)

    Savitz-Romer, Mandy; Bouffard, Suzanne M.

    2012-01-01

    How can an understanding of adolescent development inform strategies and practices for supporting first-generation college goers? In "Ready, Willing, and Able," Mandy Savitz-Romer and Suzanne Bouffard focus on the developmental tasks and competencies that young people need to develop in order to plan for and succeed in higher education. These…

  6. Sõber raamat

    Index Scriptorium Estoniae

    1997-01-01

    Raamatukaupluses EURO Publications pakutavate raamatute tutvustus. James Davidson, The Complete Home Lightning Book, 1997 Inglismaa ; Candace Ord Manroe. Uncluttered : Storage Room by Room ; Ruth Pretty. The Ultimate Interior Designer, Inglismaa 1997 ; Judith ja Martin Miller. Period Finishes and Effects, Londoni 1992 ; Suzanne Slesin, Stafford Cliff, Daniel Rozensztroch. Spanish Style, esmatrükk 1990.

  7. Mathematics Achievement Gaps between Suburban Students and Their Rural and Urban Peers Increase over Time. Issue Brief No. 52

    Science.gov (United States)

    Graham, Suzanne E.; Provost, Lauren E.

    2012-01-01

    In this brief, authors Suzanne Graham and Lauren Provost examine whether attending a school in a rural, urban, or suburban community is related to children's mathematics achievement in kindergarten, and whether increases in mathematics achievement between kindergarten and eighth grade differ for children in rural, urban, and suburban schools. They…

  8. Between Mere Tolerance and Robust Respect: Mutuality as a Basis for Civic Education in Pluralist Democracies

    Science.gov (United States)

    Rosenblith, Suzanne; Bindewald, Benjamin

    2014-01-01

    This essay by Suzanne Rosenblith and Benjamin Bindewald is motivated by the question of how do those who value civic liberalism give the religiously orthodox a reason to engage in pluralist democratic deliberations in a manner that does not allow intolerance to undermine the foundations of liberal democracy. Introducing the idea of tolerance as…

  9. Ilmus kogumik eesti naiste elulugusid inglise keeles

    Index Scriptorium Estoniae

    2006-01-01

    Carrying Linda's stones : an anthology of Estonian women's life stories / editors: Suzanne Stiver Lie, Lynda Malik, Ilvi Jõe-Cannon, Rutt Hinrikus ; foreword by H.E. Aldona Wos. Tallinn : Tallinn University Press, 2006. Sisaldab Elin Toona jt. elulugusid. Vt. ka SL Õhtuleht, 30. sept., lk. 27

  10. Two-Phase Extraction (TPE) Pilot-Scale Test Technology Evaluation Report

    Science.gov (United States)

    1995-11-01

    John Roe and Mr. Jim Pedrick ) were contacted and indicated that they would not be providing any comments. If you have any questions regarding the... Pedrick , Nellis AFB (3) Mike Thompson, Radian Suzanne Felice, Radian Jeff Lawrence, Radian Bill Buchans, Radian James Machin, Radian Project File I I I 1

  11. Mentors and Models.

    Science.gov (United States)

    Journal of Counseling and Development, 1988

    1988-01-01

    Contains five personal accounts: (1) "Critical Incidents Aren't Accidents" (Suzanne Lange); (2) "Going from Serious to Fun and Remaining Professional" (Mary Olona); (3) "The Personification of the Core Conditions" (B.S. Tillinghast, Jr.); (4) "A Personal Reaction to Carl Whitaker as a Teacher" (Katherine H. von Schmidt); and (5) "Jampy: Imaginary…

  12. Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (80th, Chicago, Illinois, July 30-August 2, 1997): Mass Communication and Society.

    Science.gov (United States)

    Association for Education in Journalism and Mass Communication.

    The Mass Communication and Society section of the Proceedings contains the following 11 papers: "A Cynical Press: Coverage of the 1996 Presidential Campaign" (Sandra H. Dickson, Cynthia Hill, Cara Pilson, and Suzanne Hanners); "JMC Faculty Divided: Majority Finds Dozen Uses for Research" (Fred Fedler, Maria Cristina Santana,…

  13. Female Focalizers and Masculine Ideals: Gender as Performance in Twilight and the Hunger Games

    Science.gov (United States)

    Guanio-Uluru, Lykke

    2016-01-01

    Stephenie Meyer's "Twilight" series (2005-2008) and Suzanne Collins' "The Hunger Games" series (2008-2010) have been hugely successful and influential texts, both as best-selling literary works and as action movie franchises. (To avoid confusion, "Twilight" and "The Hunger Games" in this essay refer to the…

  14. Changing Families, Changing Workplaces

    Science.gov (United States)

    Bianchi, Suzanne M.

    2011-01-01

    American families and workplaces have both changed dramatically over the past half-century. Paid work by women has increased sharply, as has family instability. Education-related inequality in work hours and income has grown. These changes, says Suzanne Bianchi, pose differing work-life issues for parents at different points along the income…

  15. 77 FR 32118 - Agency Information Collection Activities: Proposed Collection; Comment Request

    Science.gov (United States)

    2012-05-31

    ... focused on: (1) State initiative features and implementation, including various payment models; (2... information will help CMS decide whether the MAPCP Demonstration model should be expanded under Medicare, and... Annual Hours: 478 (For policy questions regarding this collection contact Suzanne Goodwin at 410-786-0226...

  16. On Advantages of the Kelvin Mapping in Finite Element Implementations of Deformation Processes

    CERN Document Server

    Nagel, Thomas; Moerman, Kevin M; Kolditz, Olaf

    2016-01-01

    Classical continuum mechanical theories operate on three-dimensional Eu-clidian space using scalar, vector, and tensor-valued quantities usually up to the order of four. For their numerical treatment, it is common practice to transform the relations into a matrix-vector format. This transformation is usually performed using the so-called Voigt mapping. This mapping does not preserve tensor character leaving significant room for error as stress and strain quantities follow from different mappings and thus have to be treated differently in certain mathematical operations. Despite its conceptual and notational difficulties having been pointed out, the Voigt mapping remains the foundation of most current finite element programmes. An alternative is the so-called Kelvin mapping which has recently gained recognition in studies of theoretical mechanics. This article is concerned with benefits of the Kelvin mapping in numerical modelling tools such as finite element software. The decisive difference to the Voigt mapp...

  17. Külalised Oslost / Reet Kääni

    Index Scriptorium Estoniae

    Kääni, Reet

    2000-01-01

    Oslo Õpetajate Kõrgkooli politoloogia eriala 30 üliõpilast koos õppejõududega külastasid Tallinna Pedagoogikaülikooli. Kasvatusteaduste teaduskonna õppejõud Ulve Kala ja Inge Timostsuk tutvustasid neile Eesti haridussüsteemi ja õpetajakoolitust, TPÜ rahvusvaheliste ja sotsiaaluuringute instituudi vanemteadur Klara Hallik tegi ülevaate venelaste positsioonist Eesti ühiskonnas ja Eesti-Vene suhetest, Eesti Naisuurimiskeskuse tegevust tutvustas keskuse juhataja professor Suzanne Lie

  18. Proceedings of the 3rd Biennial Conference of the Society for Implementation Research Collaboration (SIRC) 2015: advancing efficient methodologies through community partnerships and team science

    OpenAIRE

    Kerns, Suzanne; Puspitasari, Ajeng; Hendricks, Karin; Pierson, Andria; Fizur, Phil; Comtois, Katherine A.; Green, Amy E; Trott, Elise M.; Willging, Cathleen E.; Fernandez, Maria E.; Woolf, Nicholas H.; Liang, Shuting Lily; Heredia, Natalia I.; Kegler, Michelle; Risendal, Betsy

    2016-01-01

    Table of contents Introduction to the 3rd Biennial Conference of the Society for Implementation Research Collaboration: advancing efficient methodologies through team science and community partnerships Cara Lewis, Doyanne Darnell, Suzanne Kerns, Maria Monroe-DeVita, Sara J. Landes, Aaron R. Lyon, Cameo Stanick, Shannon Dorsey, Jill Locke, Brigid Marriott, Ajeng Puspitasari, Caitlin Dorsey, Karin Hendricks, Andria Pierson, Phil Fizur, Katherine A. Comtois A1: A behavioral economic perspective ...

  19. Enhancing Exposure Therapy for PTSD: Virtual Reality and Imaginal Exposure with a Cognitive Enhancer

    Science.gov (United States)

    2015-10-01

    VA, Dr. Rachel Stewart (formerly Rachel Robertson) began an emergency medical/ maternity leave on 8/19/13. At the present time, Dr. Stewart’s return...part-time to fulfill her duties. At NICoE, Dr. Suzanne Leaman returned from her maternity leave on 4/29/13. At USC, Jack Mondonedo returned from... maternity leave . Drs. Maryrose Gerardi (Emory) and Judith Cukor (Cornell) participated in a conference call with Drs. Holloway, Riggs, and Adamson on 12/13

  20. Formaatidevaheline kunstisündmus

    Index Scriptorium Estoniae

    2003-01-01

    1. XI Kanuti gildis üritusteseeria "1+1=1" hooaja avaüritus. Esinevad kuraatorid Hanno Soans ja Andres Lõo (võrguväljaande www.looming.org tutvustus), Ieva Auzina (Läti, Haralds Elcerise film "Matti Miliuse hull manifest" (1988) jm.), Suzanne van de Ven (Kassel). A. Lõo, Kiwa, Joanne Richardson (Rumeenia), Enrico Glerean (Itaalia) esinevad heliloenguga, Ene- Liis Semper, Mark Raidpere, Jaan Toomik videoportreedega

  1. CMMI (registered trademark): The Good News and Bad News about Supporting Maturity Concepts

    Science.gov (United States)

    2006-05-01

    The Good News and Bad News about Supporting Maturity Concepts Suzanne Garcia, SEI ®CMM, CMMI, IDEAL, and Capability Maturity Model are registered by...AND SUBTITLE CMMI: The Good News and Bad News about Supporting Maturity Concepts 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER...Dimensional Assessment of Technology Maturity in Fairborn, OH on 9-11 May 2006. U.S. Government or Federal Rights License 14. ABSTRACT 15. SUBJECT TERMS

  2. Les saint-simoniennes en Egypte. Analyse critique d'un modèle d'émancipation

    Directory of Open Access Journals (Sweden)

    Christiane Veauvy

    2011-01-01

    Full Text Available Le but de cet article est d’analyser l’influence et le développement méconnus des saintsimoniennes et de leur idée sur la transformation féminine en Égypte, à partir de leurs textes, et surtout de la figure centrale de Suzanne Voilquin et de son ouvrage autobiographique, mais aussi celles de Clorinde Rogé, Cécile Fournel et Agarithe Caussidère.

  3. A Successful Small Wind Future: There Is Great Potential

    Energy Technology Data Exchange (ETDEWEB)

    Tegen, Suzanne

    2017-05-02

    Suzanne Tegen made this presentation at the 2017 Small Wind Conference in Bloomington, Minnesota. It provides an overview of DOE-sponsored small wind products, testing, and support; an example of a Regional Resource Center defending distributed wind; the recently published Distributed Wind Taxonomy; the dWind model and recent results; and other recent DOE and NREL publications related to small and distributed wind.

  4. Proceedings of the 3rd Biennial Conference of the Society for Implementation Research Collaboration (SIRC) 2015: advancing efficient methodologies through community partnerships and team science

    OpenAIRE

    Kerns, Suzanne; Puspitasari, Ajeng; Hendricks, Karin; Pierson, Andria; Fizur, Phil; Comtois, Katherine A.; Green, Amy E.; Trott, Elise M.; Willging, Cathleen E.; Fernandez, Maria E.; Woolf, Nicholas H.; Liang, Shuting Lily; Heredia, Natalia I.; Kegler, Michelle; Risendal, Betsy

    2016-01-01

    Table of contents Introduction to the 3rd Biennial Conference of the Society for Implementation Research Collaboration: advancing efficient methodologies through team science and community partnerships Cara Lewis, Doyanne Darnell, Suzanne Kerns, Maria Monroe-DeVita, Sara J. Landes, Aaron R. Lyon, Cameo Stanick, Shannon Dorsey, Jill Locke, Brigid Marriott, Ajeng Puspitasari, Caitlin Dorsey, Karin Hendricks, Andria Pierson, Phil Fizur, Katherine A. Comtois A1: A behavioral economic perspective ...

  5. Wind Energy Workforce Development & Jobs

    Energy Technology Data Exchange (ETDEWEB)

    Tegen, Suzanne

    2016-11-08

    The United States needs a skilled and qualified wind energy workforce to produce domestic clean power. To assist with wind energy workforce development, the U.S. Department of Energy (DOE) and National Renewable Energy Laboratory are engaged with several efforts.This presentation by Suzanne Tegen describes these efforts, including a wind industry survey, DOE's Wind Career Map, the DOE Wind Vision report, and an in-depth discussion of the Jobs & Economic Development Impacts Model.

  6. The Australasian Hepatology Association consensus guidelines for the provision of adherence support to patients with hepatitis C on direct acting antivirals

    OpenAIRE

    Richmond JA; Sheppard-Law S; Mason S; Warner SL

    2016-01-01

    Jacqueline A Richmond,1,2 Suzanne Sheppard-Law,3,4 Susan Mason,5 Sherryne L Warner6,7 1Australian Research Centre in Sex, Health and Society, La Trobe University, 2Victorian Infectious Diseases Service, The Royal Melbourne Hospital, Melbourne, VIC, 3Faculty of Health, University of Technology, 4Sydney Children’s Hospital Network, 5AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital, Sydney, NSW, 6Department of Gastroenterology, Monash Health, 7Department of Me...

  7. PAVE: Write-print Creation with MapReduce

    Science.gov (United States)

    2015-08-01

    Suzanne J. Matthews Abstract—Cyber- crime is becoming alarmingly common through the use of anonymous e-mails. Author attribution helps digital...To utilize MapReduce, programmers are required to implement two functions: map () and reduce(). The underlying scheduling framework au- tomates the...rest of the process. The map () function processes the input and produces an intermediate set of (key, value) pairs. The reduce() function combines and

  8. Wind Power Siting: Public Acceptance and Land Use; NREL (National Renewable Energy Laboratory)

    Energy Technology Data Exchange (ETDEWEB)

    Tegen, Suzanne

    2015-06-17

    Suzanne Tegen presented this information as part of the June 17, 2015 WINDExchange webinar: Overcoming Wind Siting Challenges III: Public Acceptance and Land Use. This presentation provides an overview of current NREL research related to wind energy deployment considerations, the DOE Wind Vision as it relates to public acceptance and land use, why public acceptance of wind power matters, where the U.S. wind resource is best, and how those rich resource areas overlay with population centers.

  9. Avoiding Dirty Air (A Cup of Health with CDC)

    Centers for Disease Control (CDC) Podcasts

    2014-05-01

    As summertime approaches and warmer weather moves in, air pollution will become an increasing problem across the U.S. People with asthma are especially impacted by deteriorating air quality. In this podcast, Dr. Suzanne Beavers discusses ways to avoid the negative impacts of air pollution.  Created: 5/1/2014 by MMWR.   Date Released: 5/1/2014.

  10. Singlid. Albumid : Sound / Ahto Vahter

    Index Scriptorium Estoniae

    Vahter, Ahto

    1998-01-01

    Uutest singlitest Foo Fighters "Walking After You", Uni "St.Johns Fever", R.E.M."Daysleeper", Laila "Here We Go Again", Morcheeba "Part Of The Process", Alanis Morissette "Thank You" ja albumitest Sash! "Life Goes on", Dana International "The Album", Juice "Juice", Mica Paris "Black Angel", Music Instructor "Electro City", Republica "Speed Ballads", Crystal Waters "Best Of", Suzanne Vega "Tried And True.Best Of" ja filmimuusikakogumikust "The Oliver Stone Connection"

  11. If You Love Information, Set It Free! Promoting Freedom of Expression by Expanding Cyberspace Operations

    Science.gov (United States)

    2012-06-01

    married to a wonderful woman and they are both blessed with two beautiful children. iii ACKNOWLEDGMENTS This thesis would not have been...Col Suzanne Buono for directing our cyberspace course and for her perceptive critique of this work. To my fellow students in Class XXI , all I can...embraced freedom since the first colonies appeared along the east coast of America in the 17th century . This belief in a free society was formally

  12. Pharmacological interventions for ADHD: how do adolescent and adult patient beliefs and attitudes impact treatment adherence?

    OpenAIRE

    McCarthy S

    2014-01-01

    Suzanne McCarthy School of Pharmacy, University College Cork, Cork, Ireland Abstract: Adherence to medication can be problematic for patients, especially so for patients with attention deficit hyperactivity disorder (ADHD). Effective medications are available for the treatment of ADHD; however, nonadherence rates for ADHD medication range from 13.2%–64%. The reasons for nonadherence can be complex. This review aims to look at how the beliefs and attitudes of adolescents and adults...

  13. Characterization of a Dopaminergic Stimulatory Factor Derived from Monoclonal Cell Lines of Striatal Origin

    Science.gov (United States)

    2006-12-01

    clonal pheochromocytoma cells on depolarization-dependent exocytosis. J. Biol. Chem. 257 (1982) 3491-3500. Winkler, H. and Fischer-Colbrie, R. The...Lisa Wona, Nancy Bubulaa, Suzanne Hesseforta, Martin Grossb, Alfred Hellera,* aDepartment of Neurobiology, Pharmacology and Physiology , The University of...Reddyc, Martin Grossd a Department of Neurobiology, Pharmacology and Physiology , The University of Chicago, 947 East 58th Street, Chicago, IL 60637

  14. Singlid. Albumid : Sound / Ahto Vahter

    Index Scriptorium Estoniae

    Vahter, Ahto

    1998-01-01

    Uutest singlitest Foo Fighters "Walking After You", Uni "St.Johns Fever", R.E.M."Daysleeper", Laila "Here We Go Again", Morcheeba "Part Of The Process", Alanis Morissette "Thank You" ja albumitest Sash! "Life Goes on", Dana International "The Album", Juice "Juice", Mica Paris "Black Angel", Music Instructor "Electro City", Republica "Speed Ballads", Crystal Waters "Best Of", Suzanne Vega "Tried And True.Best Of" ja filmimuusikakogumikust "The Oliver Stone Connection"

  15. Standard Systems Group (SSG) Technology Adoption Planning Workshop

    Science.gov (United States)

    2004-04-01

    Internet Routed Protocol Network (SIPRNET) architecture • Replace the current 5-year old enterprise network backup system • Improve of current IPTV ...Standard Systems Group (SSG) Technology Adoption Planning Workshop Suzanne Garcia Lorraine Nemeth-Adams Jan Vargas April 2004...Standard Systems Group(SSG) Technology Adoption Planning Workshop 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d

  16. Wind Turbine Manufacturers in the United States: Locations and Local Impacts (Presentation)

    Energy Technology Data Exchange (ETDEWEB)

    Tegen, S.

    2010-05-26

    Suzanne Tegen's presentation about U.S. wind energy manufacturing (presented at WINDPOWER 2010 in Dallas) provides information about challenges to modeling renewables; wind energy's economic "ripple effect"; case studies about wind-related manufacturing in Colorado, Iowa, Ohio, and Indiana; manufacturing maps for the Great Lakes region, Arkansas, and the United States; sample job announcements; and U.S. Treasury Grant 1603 funding.

  17. Risk factors for the development of depression in patients with hepatitis C taking interferon-α

    OpenAIRE

    Smith KJ; Norris S; O'Farrelly C; O'Mara SM

    2011-01-01

    Kimberley J Smith¹, Suzanne Norris², Cliona O'Farrelly³, O'Mara SM¹¹Trinity College Institute of Neuroscience, ²Hepatology Centre, St James's Hospital, Dublin, Ireland; ³Department of Biochemistry and Immunology, Trinity College Dublin, Dublin, IrelandAbstract: Interferon-α, currently used for the treatment of hepatitis C, is associated with a substantially elevated risk of depression. However, no...

  18. Air Force Domestic Technology Transfer: Is It Effective

    Science.gov (United States)

    1992-04-01

    Solow , Robert M., and Thurow, Lester C., "Toward a New Industrial America," Scientific American, June 1989, Vol. 260, No. 6, p. 42. ’ National...pp. 1, 2. " Berger, Suzanne, Dertouzos, Michael L., Lester, Richard K., Solow , Robert M., and Thurow, Lester C., "Toward a New Industrial America...American industries, but the inability to bring " Inman, B.R., and Burton, Daniel F., Jr, "Technology and Competitiveness: The New Policy Frontier

  19. Maximizing the business value of information technology in home care and hospice.

    Science.gov (United States)

    2012-08-01

    Health care technology provides the key to becoming the high performing efficient organization you want to be. But how do you sift through the many available solutions and determine which technology to acquire? Do you fully understand the best practices for choosing and using technology and measuring the value gained once your new solutions are in place? Get a map to the digital road from Suzanne Sblendorio, director of Healthcare Information Technology Consulting at Simione Healthcare Consultants.

  20. Intersexualidad: una mirada feminista

    OpenAIRE

    Cano Abadía, Mónica

    2012-01-01

    En este artículo se proporciona una perspectiva queer sobre la intersexualidad, teniendo las ideas de Judith Butler como fondo siempre presente para leer a otras tres autoras fundamentales en el estudio de la intersexualidad: Anne Fausto-Sterling, Suzanne Kessler y Alice Dreger. Estas tres autoras realizan interesantes estudios sobre la intersexualidad desde diferentes perspectivas: desde la biología, desde la psicología y desde la historia. Las tres se esfuerzan por cambiar los tratamientos ...

  1. Formaatidevaheline kunstisündmus

    Index Scriptorium Estoniae

    2003-01-01

    1. XI Kanuti gildis üritusteseeria "1+1=1" hooaja avaüritus. Esinevad kuraatorid Hanno Soans ja Andres Lõo (võrguväljaande www.looming.org tutvustus), Ieva Auzina (Läti, Haralds Elcerise film "Matti Miliuse hull manifest" (1988) jm.), Suzanne van de Ven (Kassel). A. Lõo, Kiwa, Joanne Richardson (Rumeenia), Enrico Glerean (Itaalia) esinevad heliloenguga, Ene- Liis Semper, Mark Raidpere, Jaan Toomik videoportreedega

  2. A Review Of The United States Government’s Status Quo North Korean Foreign Policy Approach And Reasons For Change

    Science.gov (United States)

    2016-02-16

    Korea’s "Year of Friendship." Harvard International Review , 2015. 28 Nielsen, Suzanne C. "American Civil-Military Relations The Soldier and the State...AIR WAR COLLEGE AIR UNIVERSITY A REVIEW OF THE UNITED STATES GOVERNMENT’S STATUS QUO NORTH KOREAN FOREIGN POLICY APPROACH AND REASONS FOR...Colonel Spencer holds a Bachelor of Science degree in Mathematics, Masters of Education, and a Doctorate degree in Business Administration. She

  3. Geografía del exilio sefardí en La lozana andaluza / Geography of the Sephardic exile in La lozana andaluza

    Directory of Open Access Journals (Sweden)

    Marisa García Verdugo

    2009-09-01

    Full Text Available Resumen: Este trabajo trata de los elementos autobiográficos presentes en el Retrato de la Lozana andaluza de Francisco Delicado. Delicado se convirtió al cristianismo y se hizo sacerdote, aun así siguió a los judíos a su exilio en Italia, convivió con ellos en Roma y tras el Saqueo de Roma en 1527, se volvió a encontrar entre los sefarditas en Venecia. Francisco Delicado localiza su historia en los lugares donde habitaron los judíos sefarditas y nos lega un autorretrato cifrado en La lozana andaluza.Summary: This paper deals with the autobiographical elements present in The portrait of the Lusty Andalusian Woman by the Spanish writer Francisco Delicado. Francisco Delicado became a converso and a priest during the time of the expulsion of the Jews from Spain, however he followed the exiled Jews to Italy, lived with them in Rome and left Rome after the Sac of Rome in 1527 to find himself again with the Sephardim in Venice. Francisco Delicado sets his story in the places where there were Spanish Jews and left an encrypted self portrait in his creation of La lozana andaluza.

  4. Effects of the Spectral Line Broadened Model on the Performance of a Flowing Chemical Oxygen-Iodine Laser

    Institute of Scientific and Technical Information of China (English)

    高智; 胡利民

    2002-01-01

    A new gain saturation model of chemical oxygen-iodine lasers (COILs) is deduced from the conservation equations of the population number of upper and lower lasing levels. The present model is compared with both the Voigt profile function model and its low-pressure limit model. The differences between the Voigt profile function model or its low-pressure limit model and the model presented here are pointed out, such as the length of power extraction, the optimal range of the threshold gain. These differences are useful for the optimization of COIL adjustable parameters.

  5. Variational method of determining effective moduli of polycrystals with tetragonal symmetry

    Science.gov (United States)

    Meister, R.; Peselnick, L.

    1966-01-01

    Variational principles have been applied to aggregates of randomly oriented pure-phase polycrystals having tetragonal symmetry. The bounds of the effective elastic moduli obtained in this way show a substantial improvement over the bounds obtained by means of the Voigt and Reuss assumptions. The Hill average is found to be a good approximation in most cases when compared to the bounds found from the variational method. The new bounds reduce in their limits to the Voigt and Reuss values. ?? 1966 The American Institute of Physics.

  6. Variational method of determining effective moduli of polycrystals: (A) hexagonal symmetry, (B) trigonal symmetry

    Science.gov (United States)

    Peselnick, L.; Meister, R.

    1965-01-01

    Variational principles of anisotropic elasticity have been applied to aggregates of randomly oriented pure-phase polycrystals having hexagonal symmetry and trigonal symmetry. The bounds of the effective elastic moduli obtained in this way show a considerable improvement over the bounds obtained by means of the Voigt and Reuss assumptions. The Hill average is found to be in most cases a good approximation when compared to the bounds found from the variational method. The new bounds reduce in their limits to the Voigt and Reuss values. ?? 1965 The American Institute of Physics.

  7. Dispersion relation for localized magnetic polaritons propagating at the junction of two ferromagnetic/ non-magnetic superlattices

    Indian Academy of Sciences (India)

    R T Tagiyeva

    2004-09-01

    Localized magnetic polaritons are investigated in the systems consisting of two magnetic superlattices, coupled by a ferromagnetic contact layer. The general dispersion relation for localized magnetic polaritons are derived in the framework of the electromagnetic wave theory in the Voigt geometry by the `transfer' matrix method. The numerical calculations were carried out for different parameters of the superlattices and contact layer and then discussed.

  8. Fiscal Food Policy

    DEFF Research Database (Denmark)

    G. Nicholls, Stuart; Gwozdz, Wencke; Reisch, Lucia;

    2011-01-01

    When it comes to buying food, price is influential, but is a ‘fat tax’ the answer to curb obesity? Dr Stuart G Nicholls from Lancaster University, Assistant Professor Dr Wencke Gwozdz and Professor, Dr Lucia A Reisch from Copenhagen Business School and Dr Kristin Voigt from Lancaster University l...... look at whether a fiscal policy would work....

  9. Compact cryogenic Kerr microscope for time-resolved studies of electron spin transport in microstructures

    NARCIS (Netherlands)

    Rizo, P. J.; Pugzlys, A.; Liu, J.; Reuter, D.; Wieck, A. D.; van der Wal, C. H.; van Loosdrecht, P. H. M.; Pugžlys, A.

    2008-01-01

    A compact cryogenic Kerr microscope for operation in the small volume of high-field magnets is described. It is suited for measurements both in Voigt and Faraday configurations. Coupled with a pulsed laser source, the microscope is used to measure the time-resolved Kerr rotation response of

  10. Populations of Radial Glial Cells Respond Differently to Reelin and Neuregulin1 in a Ferret Model of Cortical Dysplasia

    Science.gov (United States)

    2010-10-28

    out of the ventricular zone, but do not play a role in allowing further movement toward the cortical plate. Materials and Methods Ethics Statement...transformation into astrocytes. Anatomy and embryology 156(2): 115–152. 11. Voigt T (1989) Development of glial cells in the cerebral wall of ferrets

  11. Bayesian inversion of free oscillations for Earth's radial (an)elastic structure

    NARCIS (Netherlands)

    de Wit, R. W L; Käufl, P.J.; Valentine, A. P.; Trampert, J.

    2014-01-01

    We perform a Bayesian inversion of degree-zero spheroidal mode splitting function measurements for radial (1-D) Earth structure, in terms of the Voigt averages of P-wave (VP) and S-wave (VS) velocities, density, bulk and shear attenuation, using neural networks. The method is flexible and allows us

  12. A Manual on the Evaluation of Information Centers and Services (Manuel pour l’Evaluation des Centres et Services d’Information)

    Science.gov (United States)

    1991-04-01

    compute costs of resources or services. conductA ~ per user). More complex models include statistical correlation, multiple regression and conjoint In...Publishing, 1982. "Information and Work." In Progress in Communication Slater, Margaret. Sciences:, Volume 2, eds. Brenda Dervin and Melvin Voigt, " Social

  13. TÜ tähistab rahvusülikooli aastapäeva

    Index Scriptorium Estoniae

    2010-01-01

    Emakeelse ülikooli 91. aastapäeva tähistamisest. Aktusel promoveeriti 103 doktorit ja 5 audoktorit. Audoktoriks said: Jaan Einasto (Eesti), Vilmos Voigt (Ungari), Pekka Topias Männistö (Soome), William J. Mitsch (USA), Lars Oreland (Rootsi)

  14. Tunable Optical Delay in Doppler-Broadened Cesium Vapor

    Science.gov (United States)

    2010-12-01

    1971; Bernabeu and Alvarez, 1980; Tornos and Amare, 1986), normally accomplished at low temperatures to reduce Cs-Cs collisions. Wall collisions and...algorithms for the voigt profile function. Computers in Physics 7 (6), 627–631. Tornos , J. and J. C. Amare (1986). Hyperfine relaxation of an optically pumped

  15. Fostering reflective practice with mobile technologies

    NARCIS (Netherlands)

    Tabuenca, Bernardo; Verpoorten, Dominique; Ternier, Stefaan; Westera, Wim; Specht, Marcus

    2012-01-01

    Tabuenca, B., Verpoorten, D., Ternier, S., Westera, W., & Specht, M. (2012). Fostering reflective practice with mobile technologies. In A. Moore, V. Pammer, L. Pannese, M. Prilla, K. Rajagopal, W. Reinhardt, Th. D. Ullman, & Ch. Voigt (Eds.), Proceedings of the 2nd Workshop on Awareness and Reflecti

  16. Understanding the meaning of awareness in Research Networks

    NARCIS (Netherlands)

    Reinhardt, Wolfgang; Mletzko, Christian; Sloep, Peter; Drachsler, Hendrik

    2013-01-01

    Reinhardt, W., Mletzko, C., Sloep, P. B., & Drachsler, H. (2012). Understanding the meaning of awareness in Research Networks. In A. Moore, V. Pammer, L. Pannese, M. Prilla, K. Rajagopal, W. Reinhardt, Th. D. Ullman, & Ch. Voigt (Eds.), Proceedings of the 2nd Workshop on Awareness and Reflection in

  17. Proceedings of the 2nd Workshop on Awareness and Reflection in Technology-Enhanced Learning

    NARCIS (Netherlands)

    Moore, Adam; Pammer, Viktoria; Pannese, Lucia; Prilla, Michael; Rajagopal, Kamakshi; Reinhardt, Wolfgang; Ullman, Thomas; Voigt, Christian

    2013-01-01

    Moore, A., Pammer, V., Pannese, L., Prilla, M., Rajagopal, K., Reinhardt, W., Ullman, Th. D., & Voigt, Ch. (Eds.) (2012). Proceedings of the 2nd Workshop on Awareness and Reflection in Technology Enhanced Learning. In conjunction with the 7th European Conference on Technology Enhanced Learning: 21st

  18. Henri Velge, l'artisan du Conseil d'Etat belge (1911-1946)

    OpenAIRE

    Muller, Françoise

    2007-01-01

    Cette contribution est un résumé de notre mémoire de licence "L'institution du Conseil d'Etat en Belgique: le combat d'un homme, Henri Velge" défendu en 2003 à l'ULB (Prix Suzanne Tassier). Elle revient sur le long et difficile processus de création de cette institution, débattu depuis l'Indépendance en 1830. The Council of State, created in 1946, results from an extremely long process of gestation which proceeded in three phases: a failed legislative (1832-1857), a doctrinal (1857-1911) a...

  19. Getting to the Point: Storying the United States Military Academy’s and Its Preparatory School’s English Program.

    Science.gov (United States)

    1998-01-01

    I can’t say that I am a big fan of using social issues as the subject matter for a composition class. Among other things, I believe that models of... Anatomy ." Täte andCorbett 325-332. Webb, Suzanne Strobeck. "Do We Really Have to Teach Grammar? And If So, How?" Russell and McDonald 135-149. Young...1. He borrowed a tongs from a hut a long ways off. 4. The Amazon is longer than any other river of Europe. 7. She is one of those cheerful women

  20. User’s Manual for the Navy Coastal Ocean Model (NCOM) Version 4.0

    Science.gov (United States)

    2009-02-06

    Manual for the Navy Coastal Ocean Model (NCOM) Version 4.0 Paul J. Martin Charlie n. Barron luCy F. SMedStad tiMothy J. CaMPBell alan J. WallCraFt...Timothy J. Campbell, Alan J. Wallcraft, Robert C. Rhodes, Clark Rowley, Tamara L. Townsend, and Suzanne N. Carroll* Naval Research Laboratory...1997- 1998 ENSO event. Bound.-Layer Meteor. 103: 439-458. Large, W.G., J.C. McWilliams , and S. Doney, (1994). Oceanic vertical mixing: a review and

  1. Navy Coastal Ocean Model (NCOM) Version 4.0 (User’s Manual)

    Science.gov (United States)

    2009-02-06

    Manual for the Navy Coastal Ocean Model (NCOM) Version 4.0 Paul J. Martin Charlie n. Barron luCy F. SMedStad tiMothy J. CaMPBell alan J. WallCraFt...Timothy J. Campbell, Alan J. Wallcraft, Robert C. Rhodes, Clark Rowley, Tamara L. Townsend, and Suzanne N. Carroll* Naval Research Laboratory...the 1997- 1998 ENSO event. Bound.-Layer Meteor. 103: 439-458. Large, W.G., J.C. McWilliams , and S. Doney, (1994). Oceanic vertical mixing: a review

  2. Wind Energy Workforce: Who Are We Today and Where Do We Need to Go Tomorrow?

    Energy Technology Data Exchange (ETDEWEB)

    Tegen, Suzanne

    2017-06-01

    Suzanne Tegen's presentation at the 2017 WINDPOWER Conference & Exhibition provided a description of the wind energy workforce by industry and occupation, a discussion of the level of difficulty in finding qualified applicants (from an industry survey), and an overview of the level of education preferred by people hiring for the industry. The presentation also covers available training programs and ways that the Energy Department and its National Renewable Energy Laboratory are working to bridge the gap in the industry and facilitate more motivated, well-educated wind industry workers.

  3. A comparison of screening batteries in the detection of neurocognitive impairment in HIV-infected Spanish speakers

    OpenAIRE

    Levine, Andrew; Palomo,, L Valencia; Lopez,; Singer, MR; Valdes-Sueiras,; Hinkin, Charles; Mathisen,; S. Donovan

    2011-01-01

    Andrew J Levine1, Manuel Palomo1, Charles H Hinkin2,3, Miguel Valdes-Sueiras1,5, Enrique Lopez3,4, Glenn Mathisen1,5, Suzanne Donovan1,5, Elyse J Singer11National Neurological AIDS Bank, Department of Neurology, David Geffen School of Medicine at UCLA, 2Veterans Affairs Greater Los Angeles Healthcare System, 3Department of Psychiatry and Behavioral Sciences, David Geffen School of Medicine at UCLA, 4Department of Psychiatry and Behavioral Neuroscience, Cedars-Sinai Medical Center, Los Angeles...

  4. Bibliografía

    OpenAIRE

    2014-01-01

    ALBORNOZ (Oswaldo) - Las lachas indígenas en el Ecuador, Guayaquil, 1971. ALCHON, (Suzanne Austin).- Native society and desease in colonial Ecuador, Londres-Nueva York-Melbourne, 1991 BORCHART DE MORENO (Christiana) - "EI período colonial", en Pichincha, monografia histórica de la región nuclear ecuatoriana, Quito, 1981, pp. 195- 274. BORCHART DE MORENO (Christiana).- "Origen y conformación de la hacienda colonial", Nueva Historia del Ecuador, Quito, 1989, vol. 4, pp. 139-166. "Constituciones...

  5. Analysis of Human Communication during Assembly Tasks.

    Science.gov (United States)

    1986-06-01

    AD-A7l 43 ANALYSIS OF HUMAN COMMUNICATION DURING ASSEMBLY TASKS in1(U) CRNEGIE-MELLO UNIY PITTSBURGH PA ROBOTICS INST UNCLSSIIEDK S BARBER ET AL...ao I Dur~~~~IngAbcbyTs; 7c .S:in i lSAo .0. Analysis of Human Communication During Assembly Tasks K. Suzanne Barber and Gerald J. Agin CMU-RI-TR-86-1...TYPE or REPORT & PE-Rioo CevCZaz Analysis of Human Communication During Assembly Inlterim Tasks I . PERFORMING 00RG. REPORT NUMBER 1. £UT~oOR~e) IL

  6. 11th Annual Systems Engineering Conference

    Science.gov (United States)

    2008-10-23

    value equation in engineering and acquisition to align systems of systems with dynamic mission needs Mr. Philip J Boxer Ms. Suzanne Garcia Mr. William...Modeling and Simulation Mr. Van SullivanLTC Favio Lopez 2D5 7175 LVC Architecture Roadmap - A Path Forward for Distributed Simulation Mr. James W...734-5892 Marsha Smith 736-5211 545 A/C Sust Sq (VIP/SAM) Erik Michelsen 736-3233 544 A/C Sust Sq (Tanker/Airlift) Karl Turner 739-2985 546 A/C Sust

  7. Encuentros artísticos con el dolor, las memorias y las violencias

    OpenAIRE

    Riaño Alcalá, Pilar

    2005-01-01

    El artículo examina las pugnas del recuerdo y el olvido en comunidades afectadas y divididas por la violencia. Mira a un proyecto de arte público comunitario que reunió mi investigación antropológica sobre jóvenes, memoria y violencia, el trabajo de arte público de la artista Suzanne Lacy, el trabajo comunitario de una coalición de organizaciones gubernamentales y no gubernamentales y el liderazgo de un grupo de residentes del barrio Antioquia en Medellín (Colombia). El proyecto de arte comun...

  8. 女性创业的商业策略

    Institute of Scientific and Technical Information of China (English)

    陶子

    2011-01-01

    当苏珊妮·谢(SuzanneXie)辞去高盛集团(GoldmanSachs)资产管理工作专注于她创办的企业时,她还申请了星巴克(Starbucks)兼职店员的工作,因为她觉得,自己可以用这种方式获得这家咖啡连锁店提供的医疗保险。

  9. Breaking and catching feminism: female roles in literature for young adults

    OpenAIRE

    Gyløien, Hanne

    2014-01-01

    In this thesis, I investigate female roles in literature for young adults, taking a comparative approach to a number of the most popular and bestselling works in recent times, The Twilight Series (2005-2008) by Stephenie Meyer and The Hunger Games (2008-2010) by Suzanne Collins. The thesis will open with a brief historical overview of the history of feminism followed by a descriptive summary of the origins and developments of children’s literature/ young adult literature in the United States....

  10. Potential for Jobs and Economic Development from Offshore Wind in California

    Energy Technology Data Exchange (ETDEWEB)

    Tegen, Suzanne

    2016-11-02

    In California's future scenarios, energy demand increases with population growth and productivity. Decision-makers will have to make choices about which energy resources to utilize, and offshore wind offers one option for carbon-free electricity with the potential for increased local jobs. This presentation discusses results from an NREL report, Floating Offshore Wind in California: Gross Potential for Jobs and Economic Impacts from Two Future Scenarios. Presenter Suzanne Tegen describes the Jobs and Economic Development Impact (JEDI) model and its results for two offshore wind scenarios in California. She discusses different assumptions and how they affect the scenarios.

  11. Physics The First Science

    CERN Document Server

    LINDENFELD, Peter

    2011-01-01

    Today's physics textbooks have become encyclopedic, offering students dry discussions, rote formulas, and exercises with little relation to the real world. Physics: The First Science offers uniquely accessible, student-friendly explanations, historical and philosophical perspectives and mathematics in easy-to-comprehend dialogue. It emphasizes the unity of physics and its place as the basis for all science. With their experience instructing both students and teachers of physics for decades, Peter Lindenfeld and Suzanne White Brahmia have developed an algebra-based physics book with fea

  12. The Military Survivor Benefit Plan: How Much Does It Benefit the Retiree?

    Science.gov (United States)

    1979-12-01

    320829 123121234 110 JEAN 300528 120 NANCY 611202 130 SUZANNE 600409 140 MICHAEL 590228 1500 0 1600 0 170 0 0 180 0 0 190 0 0 200 0 0 210 0 0 220 810731...S0Ul L. LUC ; a; 0. co F-O3S P: P!0C0o:v c P : V4 M V4 C LJ~ a0 0. N . ~ * . (% 1% -6 \\J w N C- a. a .4 a. a, 0 -4 N 4 t .tt 0*4 LA -4 v r ll6 I lc (NJ0

  13. Elastic constants of calcite

    Science.gov (United States)

    Peselnick, L.; Robie, R.A.

    1962-01-01

    The recent measurements of the elastic constants of calcite by Reddy and Subrahmanyam (1960) disagree with the values obtained independently by Voigt (1910) and Bhimasenachar (1945). The present authors, using an ultrasonic pulse technique at 3 Mc and 25??C, determined the elastic constants of calcite using the exact equations governing the wave velocities in the single crystal. The results are C11=13.7, C33=8.11, C44=3.50, C12=4.82, C13=5.68, and C14=-2.00, in units of 1011 dyncm2. Independent checks of several of the elastic constants were made employing other directions and polarizations of the wave velocities. With the exception of C13, these values substantially agree with the data of Voigt and Bhimasenachar. ?? 1962 The American Institute of Physics.

  14. Spectroscopic Study of Air-Broadened Nitrous Oxide in the ν_3 Band

    Science.gov (United States)

    Hashemi, Robab; Naseri, Hossein; Predoi-Cross, Adriana; Smith, Mary Ann H.; Devi, V. Malathy

    2017-06-01

    We present results of a recent analysis of laboratory spectra to determine line positions, intensities, air-broadened half-widths and pressure-induced shifts and their temperature dependences in the ν_3 fundamental band of N_2O. The spectra used in this study were recorded using the 1-m McMath-Pierce Fourier transform spectrometer while it was located at the National Solar Observatory on Kitt Peak, AZ. Multispectrum analysis software was used to retrieve the line parameters using the Voigt and speed-dependent Voigt line profiles. The line mixing coefficients were calculated using the Exponential Power Gap scaling law. Comparisons with similar published results will be presented. D. C. Benner, C. P. Rinsland, V. Malathy Devi, M. A. H. Smith, D. Atkins, JQSRT 53 (1995) 705-721.

  15. Numerical analysis of road pavement thermal deformability, based on Biot viscoelastic model of porous medium

    Science.gov (United States)

    Bartlewska-Urban, Monika; Zombroń, Marek; Strzelecki, Tomasz

    2016-03-01

    The following study presents numerical calculations for establishing the impact of temperature changes on the process of distortion of bi-phase medium represented using Biot consolidation equations with Kelvin-Voigt rheological skeleton presented, on the example of thermo-consolidation of a pavement of expressway S17. We analyzed the behavior of the expressway under the action of its own weight, dynamic load caused by traffic and temperature gradient. This paper presents the application of the Biot consolidation model with the Kelvin-Voigt skeleton rheological characteristics and the influence of temperature on the deformation process is taken into account. A three-dimensional model of the medium was created describing the thermal consolidation of a porous medium. The 3D geometrical model of the area under investigation was based on data obtained from the land surveying and soil investigation of a 200 m long section of the expressway and its shoulders.

  16. Study on Stress Development in the Phase Transition Layer of Thermal Barrier Coatings

    Directory of Open Access Journals (Sweden)

    Yijun Chai

    2016-09-01

    Full Text Available Stress development is one of the significant factors leading to the failure of thermal barrier coating (TBC systems. In this work, stress development in the two phase mixed zone named phase transition layer (PTL, which grows between the thermally grown oxide (TGO and the bond coat (BC, is investigated by using two different homogenization models. A constitutive equation of the PTL based on the Reuss model is proposed to study the stresses in the PTL. The stresses computed with the proposed constitutive equation are compared with those obtained with Voigt model-based equation in detail. The stresses based on the Voigt model are slightly higher than those based on the Reuss model. Finally, a further study is carried out to explore the influence of phase transition proportions on the stress difference caused by homogenization models. Results show that the stress difference becomes more evident with the increase of the PTL thickness ratio in the TGO.

  17. Application of ultrasonic guided waves to the characterization of texture in metal sheets of cubic and hexagonal crystallites

    Energy Technology Data Exchange (ETDEWEB)

    Li, Yan.

    1990-10-08

    Ultrasonic techniques have recently been applied to the texture characterization in polycrystalline aggregates of hexagonal crystals. The basis of this application lies in the relations between the elastic constants {bar C}{sub ij} of the aggregates, which can be inferred from ultrasonic wave velocity measurements, and the orientation distribution coefficients. This communication present such relations for aggregates which possess orthotopic material symmetry and hexagonal crystal symmetry for Voigt, Reuss, and Hill averaging methods in a unified and concise representation.

  18. Asymptotic stability and blow up for a semilinear damped wave equation with dynamic boundary conditions

    KAUST Repository

    Gerbi, Stéphane

    2011-12-01

    In this paper we consider a multi-dimensional wave equation with dynamic boundary conditions, related to the KelvinVoigt damping. Global existence and asymptotic stability of solutions starting in a stable set are proved. Blow up for solutions of the problem with linear dynamic boundary conditions with initial data in the unstable set is also obtained. © 2011 Elsevier Ltd. All rights reserved.

  19. Decentralizing Statistical Accuracy Control Responsibility to the Ship Production Workforce (The National Shipbuilding Research Program)

    Science.gov (United States)

    1987-01-01

    was understood and will be applied correctly. The future and continued success of this program is not guaranteed. Cementing the gains made to date...nate rework. (Right) Enjoying a potluck lunch, the Table 10 team includes (seated, from left) Jose Murillo, Tim Plttrizzi, Frank de la Cruz, Jorge Valdez...Nguyen, Gabe Martinez, Hung Cao, Dave Voigt, Jr,, Jorge Castro, Phil Murray, Henry Posey, Ben Fuentes, Aian Richle, and Cristobal Orozco . Not present

  20. A Raman Study of Titanate Nanotubes

    African Journals Online (AJOL)

    NJD

    The effect of the addition of NaOH or KOH on commercial Degussa Titania P25 ... that the nanotubes are built from a layered titanate structure, ... about 1 mg material into 1 mL ethanol for 10 minutes and a few ... effect of washing on the tube properties. ..... 25 Z.R. Tian, J.A. Voigt, J. Liu, B. McKenzie and H. Xu, J. Am. Chem.

  1. Modelling water hammer in viscoelastic pipelines: short brief

    Science.gov (United States)

    Urbanowicz, K.; Firkowski, M.; Zarzycki, Z.

    2016-10-01

    The model of water hammer in viscoelastic pipelines is analyzed. An appropriate mathematical model of water hammer in polymer pipelines is presented. An additional term has been added to continuity equation to describe the retarded deformation of the pipe wall. The mechanical behavior of viscoelastic material is described by generalized Kelvin-Voigt model. The comparison of numerical simulation and experimental data from well known papers is presented. Short discussion about obtained results are given.

  2. X-Ray Diffractometry of Thin Layers - Possibilities and Problems

    Directory of Open Access Journals (Sweden)

    Vladimir Zucha

    2005-01-01

    Full Text Available Efficieney of two deconvolution methods used in X-ray powder diffraction analysis is compared for thin films of Pd and Pt. The first method is the classical Stokes method and the second one is method of indirect deconvolution. But calculated integral breadth of Gauss and Cauchy components of Voigt function which describe the physical broadening are different. The analysis of the all found pheromones show that the method of indirect deconvolution gives more accurate results.

  3. Role of biplane digital subtraction angiography, and 3D rotational angiography in craniopagus twins: A case report, detailed pictorial evaluation, and review of literature.

    Science.gov (United States)

    Sudha, Lakshmi; Dev, Bhawna; Kamble, Ravindra; Joseph, Santhosh

    2009-07-01

    Cranially conjoined twins (craniopagus) are regarded as one of the rarest human malformations. Craniopagus represents 2 to 6% of conjoined twins and is the rarest type of disorder. A conventional angiogram with three dimensions is needed to confirm the exact extent of sharing of the arterial / venous tree. 3D angiography was first proposed by CORNELIUS and advanced into clinical practice by VOIGT in 1975. We present a case of craniopagus vertical type II twins, evaluated for cerebral circulation.

  4. Role of biplane digital subtraction angiography, and 3D rotational angiography in craniopagus twins: A case report, detailed pictorial evaluation, and review of literature

    OpenAIRE

    Lakshmi Sudha; Bhawna Dev; Ravindra Kamble; Santhosh Joseph

    2009-01-01

    Cranially conjoined twins (craniopagus) are regarded as one of the rarest human malformations. Craniopagus represents 2 to 6% of conjoined twins and is the rarest type of disorder. A conventional angiogram with three dimensions is needed to confirm the exact extent of sharing of the arterial / venous tree. 3D angiography was first proposed by CORNELIUS and advanced into clinical practice by VOIGT in 1975. We present a case of craniopagus vertical type II twins, evaluated for cerebral circulat...

  5. Role of biplane digital subtraction angiography, and 3D rotational angiography in craniopagus twins: A case report, detailed pictorial evaluation, and review of literature

    Directory of Open Access Journals (Sweden)

    Lakshmi Sudha

    2009-01-01

    Full Text Available Cranially conjoined twins (craniopagus are regarded as one of the rarest human malformations. Craniopagus represents 2 to 6% of conjoined twins and is the rarest type of disorder. A conventional angiogram with three dimensions is needed to confirm the exact extent of sharing of the arterial / venous tree. 3D angiography was first proposed by CORNELIUS and advanced into clinical practice by VOIGT in 1975. We present a case of craniopagus vertical type II twins, evaluated for cerebral circulation.

  6. Vibration suppression with approximate finite dimensional compensators for distributed systems: Computational methods and experimental results

    Science.gov (United States)

    Banks, H. T.; Smith, Ralph C.; Wang, Yun

    1994-01-01

    Based on a distributed parameter model for vibrations, an approximate finite dimensional dynamic compensator is designed to suppress vibrations (multiple modes with a broad band of frequencies) of a circular plate with Kelvin-Voigt damping and clamped boundary conditions. The control is realized via piezoceramic patches bonded to the plate and is calculated from information available from several pointwise observed state variables. Examples from computational studies as well as use in laboratory experiments are presented to demonstrate the effectiveness of this design.

  7. Proceedings of the 2nd Workshop on Awareness and Reflection in Technology-Enhanced Learning

    OpenAIRE

    Moore, Adam; Pammer, Viktoria; Pannese, Lucia; Prilla, Michael; Rajagopal, Kamakshi; Reinhardt, Wolfgang; Ullman, Thomas; Voigt, Christian

    2013-01-01

    Moore, A., Pammer, V., Pannese, L., Prilla, M., Rajagopal, K., Reinhardt, W., Ullman, Th. D., & Voigt, Ch. (Eds.) (2012). Proceedings of the 2nd Workshop on Awareness and Reflection in Technology Enhanced Learning. In conjunction with the 7th European Conference on Technology Enhanced Learning: 21st Century Learning for 21st Century Skills (ARTEL/EC-TEL 2012). September, 18, 2012, Saarbrücken, Germany. Available online at http://ceur-ws.org/Vol-931/.

  8. Wave-Sediment Interaction in Muddy Environments: A Field Experiment

    Science.gov (United States)

    2009-01-01

    Liu, 1987), generalized Voigt solids (Jiang and Mehta, 1995; Jiang and Mehta, 1996), and non-Newtonian fluids (Chou et al., 1993; Foda et al., 1993...dissipation is significantly stronger (Gade, 1957; Chou et al., 1993; Foda et al., 1993). On the other hand, even under mildly energetic waves mud...state can change from consolidated to fluid over the duration of one storm (Chou et al., 1993; Foda et al., 1993; also deWitt, 1995). The similar

  9. Dispersion regions overlapping for bulk and surface polaritons in a magnetic-semiconductor superlattice

    CERN Document Server

    Fesenko, Volodymyr I; Tuz, Vladimir R

    2016-01-01

    Extraordinary dispersion features of both bulk and surface polaritons in a finely-stratified magnetic-semiconductor structure which is under an action of an external static magnetic field in the Voigt geometry are discussed in this letter. It is shown that the conditions for total overlapping dispersion regions of simultaneous existence of bulk and surface polaritons can be reached providing a conscious choice of the constitutive parameters and material fractions for both magnetic and semiconductor subsystems.

  10. Closed-Loop Resuscitation of Hemorrhagic Shock

    Science.gov (United States)

    2011-02-21

    of care arterial blood pressure. We collected data from hemorrhaged sheep experiments (funded by this ONR grant), and from a series of hemorrhaged...ongoing, and is the focus of engineering graduate student Ben Voigt. 9) We continued close collaborations with the Institute of Surgical Research on...finger), and pigs (tail). This provides the opportunity to perform testing in reproducible animal models. CareTaker will have to be tested in patients

  11. Hybrid Soft Soil Tire Model (HSSTM). Part 1: Tire Material and Structure Modeling

    Science.gov (United States)

    2015-04-28

    HYBRID SOFT SOIL TIRE MODEL (HSSTM). PART I: TIRE MATERIAL AND STRUCTURE MODELING Taheri, Sh.a,1, Sandu, C.a...model the dynamic behavior of the tire on soft soil , a lumped mass discretized tire model using Kelvin-Voigt elements is developed. To optimize the...terrains (such as sandy loam) and tire force and moments, soil sinkage, and tire deformation data were collected for various case studies based on a

  12. Tissue elasticity properties as biomarkers for prostate cancer

    OpenAIRE

    Hoyt, Kenneth; Castaneda, Benjamin; Zhang, Man; Nigwekar, Priya; di Sant’Agnese, P.Anthony; Joseph, Jean V.; Strang, John; Rubens, Deborah J.; Parker, Kevin J.

    2008-01-01

    In this paper we evaluate tissue elasticity as a longstanding but qualitative biomarker for prostate cancer and sonoelastography as an emerging imaging tool for providing qualitative and quantitative measurements of prostate tissue stiffness. A Kelvin-Voigt Fractional Derivative (KVFD) viscoelastic model was used to characterize mechanical stress relaxation data measured from human prostate tissue samples. Mechanical testing results revealed that the viscosity parameter for cancerous prostate...

  13. Signal Processing for Fibre-optic Distributed Sensing Techniques Employing Brillouin Scattering

    Institute of Scientific and Technical Information of China (English)

    XIAO Shang-hui; LI Li

    2009-01-01

    As fibre optic distributed scattering sensing systems are providing innovative solutions for the monitoring of large structures, Brillouin-based distributed scattering sensing techniques represent a new physical approach for structures health monitoring, which seems extremely promising and is receiving most attentions. This paper comprehensively presents some methods of signal interrogation for fibre optic Brillouin-based distributed scattering sensing technology, especially establishes an accurate Pseudo-Voigt model of Brillouin gain spectrum and gives some results on spectrum analysis and data processing.

  14. Laura Laur, personnage hologramme. De l'intersubjectivité dans la littérature

    Directory of Open Access Journals (Sweden)

    Isabelle Boisclair

    2015-01-01

    Full Text Available La construction particulière de Laura Laur, de Suzanne Jacob (1983, effaçant la voix du personnage principal au profit de quatre personnages de son entourage (deux frères et deux amants, est ici prise en exemple pour aborder l’intersubjectivité, selon laquelle tout échange entre deux sujets participe à la production des subjectivités de chacun d’entre eux. Compte tenu du sexe des instances narratives (ce sont quatre hommes qui dessinent, depuis leurs positions respectives, une femme, est aussi considérée la dimension genrée du travail des rapports intersubjectifs dans la constitution du soi. Laura Laur apparaît ainsi comme un hologramme trahissant les attentes des uns et des autres envers le féminin. The singular construction of Suzanne Jacob’s Laura Laur (1983, which effaces the voice of the main character in favour of that of four characters from her entourage (two brothers and two lovers is taken here as an example for approaching intersubjectivity, an approach according to which every exchange between two subjects contributes to the production of their subjectivity. Taking into account the sex of the narrative instances (four men depicting a woman from their various perspectives, the gendered dimension of the role of intersubjective relations in the constitution of the self is also considered. Laura Laur then appears as a hologram that betrays the various expectations associated with the feminine.

  15. Investigation of magneto-optical effects on properties of surface modes in one dimensional magnetized plasma photonic crystals

    Science.gov (United States)

    Shukla, Shikha; Prasad, Surendra; Singh, Vivek

    2016-09-01

    We have studied the properties of surface modes on one dimensional magnetized plasma photonic crystals in two configurations: Faraday and Voigt configurations. The results have been demonstrated by using the transfer matrix method and employing boundary conditions for TE and TM modes, respectively. For the Voigt effect, only the TM mode is considered because the TE modes under the influence of external magnetic field have the same properties as un-magnetized plasma. The influence of external magnetic field has been studied for three cases, i.e., TE left circular polarization, TE right circular polarization, and TM surface modes. It is shown that the properties of surface modes can be tuned correspondingly by changing the cap layer thickness, wave vector, and external magnetic field in the desired photonic band gap. The results show that collision frequency has a negligible effect on surface modes. A new type of wave called Fano mode has been reported for the Voigt effect for the TM mode in the first band gap. Proof of its existence has been demonstrated in the present paper.

  16. Experimental and Theoretical He-BROADENED Line Parameters of Carbon Monoxide in the Fundamental Band

    Science.gov (United States)

    Predoi-Cross, Adriana; Rosario, Hoimonti; Esteki, Koorosh; Latif, Shamria; Naseri, Hossein; Thibault, Franck; Devi, V. Malathy; Smith, Mary Ann H.; Mantz, Arlan

    2016-06-01

    We report experimental measurements and theoretical calculations for He-broadened Lorentz half-width coefficients and He- pressure-shift coefficients of 45 carbon monoxide transitions in the 1-0 band. The high-resolution spectra analyzed in this study were recorded over a range of sample temperatures between 296 and 80 K. The He-broadened line parameters and their temperature dependences were retrieved using a multispectrum nonlinear least squares analysis program. A previous analysis of these spectra used only the Voigt line shape. In the present study four line shape models were compared including Voigt, speed dependent Voigt, Rautian (to take into account confinement narrowing) and Rautian with speed dependence. The line mixing coefficients have been calculated using the Exponential Power Gap scaling law. We were unable to retrieve the temperature dependence of the line mixing coefficients. The current measurements and theoretical results are compared with other published results, where appropriate. A. W. Mantz et al., J. Molec. Structure 742 (2005) 99-110

  17. Evaluating Bounds and Estimators for Constants of Random Polycrystals Composed of Orthotropic Elastic Materials

    Energy Technology Data Exchange (ETDEWEB)

    Berryman, J. G.

    2012-03-01

    While the well-known Voigt and Reuss (VR) bounds, and the Voigt-Reuss-Hill (VRH) elastic constant estimators for random polycrystals are all straightforwardly calculated once the elastic constants of anisotropic crystals are known, the Hashin-Shtrikman (HS) bounds and related self-consistent (SC) estimators for the same constants are, by comparison, more difficult to compute. Recent work has shown how to simplify (to some extent) these harder to compute HS bounds and SC estimators. An overview and analysis of a subsampling of these results is presented here with the main point being to show whether or not this extra work (i.e., in calculating both the HS bounds and the SC estimates) does provide added value since, in particular, the VRH estimators often do not fall within the HS bounds, while the SC estimators (for good reasons) have always been found to do so. The quantitative differences between the SC and the VRH estimators in the eight cases considered are often quite small however, being on the order of ±1%. These quantitative results hold true even though these polycrystal Voigt-Reuss-Hill estimators more typically (but not always) fall outside the Hashin-Shtrikman bounds, while the self-consistent estimators always fall inside (or on the boundaries of) these same bounds.

  18. HELIOS-K: An Ultrafast, Open-source Opacity Calculator for Radiative Transfer

    CERN Document Server

    Grimm, Simon L

    2015-01-01

    We present an ultrafast opacity calculator for application to exoplanetary atmospheres, which we name HELIOS-K. It takes a line list as an input, computes the shape of each spectral line (e.g., a Voigt profile) and provides an option for grouping an enormous number of lines into a manageable number of bins. We implement a combination of Algorithm 916 and Gauss-Hermite quadrature to compute the Voigt profile, write the code in CUDA and optimise the computation for graphics processing units (GPUs). We use the k-distribution method to reduce $\\sim 10^5$ to $10^8$ lines to $\\sim 10$ to $10^4$ wavenumber bins, which may then be used for radiative transfer, atmospheric retrieval and general circulation models. We demonstrate that the resampling of the k-distribution function, within each bin, is an insignificant source of error across a broad range of wavenumbers and column masses. By contrast, the choice of line-wing cutoff for the Voigt profile is a significant source of error and affects the value of the compute...

  19. Connecting the grain-shearing mechanism of wave propagation in marine sediments to fractional calculus

    CERN Document Server

    Pandey, Vikash

    2015-01-01

    An analogy is drawn between the diffusion-wave equations derived from the fractional Kelvin-Voigt model and those obtained from Buckingham's grain-shearing (GS) model [J. Acoust. Soc. Am. 108, 2796-2815 (2000)] of wave propagation in saturated, unconsolidated granular materials. The material impulse response function from the GS model is found to be similar to the power-law memory kernel which is inherent in the framework of fractional calculus. The compressional wave equation and shear wave equation derived from the GS model turn out to be the Kelvin-Voigt fractional-derivative wave equation and the fractional diffusion-wave equation respectively. Also, a physical interpretation of the characteristic fractional-order present in the Kelvin-Voigt fractional derivative wave equation and time-fractional diffusion-wave equation is inferred from the GS model. The shear wave equation from the GS model predicts both diffusion and wave propagation in the fractional framework. The overall goal is intended to show that...

  20. Indexing it all the subject in the age of documentation, information, and data

    CERN Document Server

    Day, Ronald E

    2014-01-01

    In this book, Ronald Day offers a critical history of the modern tradition of documentation. Focusing on the documentary index (understood as a mode of social positioning), and drawing on the work of the French documentalist Suzanne Briet, Day explores the understanding and uses of indexicality. He examines the transition as indexes went from being explicit professional structures that mediated users and documents to being implicit infrastructural devices used in everyday information and communication acts. Doing so, he also traces three epistemic eras in the representation of individuals and groups, first in the forms of documents, then information, then data. Day investigates five cases from the modern tradition of documentation. He considers the socio-technical instrumentalism of Paul Otlet, "the father of European documentation" (contrasting it to the hermeneutic perspective of Martin Heidegger); the shift from documentation to information science and the accompanying transformation of persons and texts i...

  1. The Role of Mesenchymal Stem Cells in Promoting Ovarian Cancer Growth and Spread

    Science.gov (United States)

    2014-12-01

    Coffelt  SB,  Ruth  S.  Waterman,  Luisa   Florez ,  Kerstin  Höner  zu  Bentrup,  Kevin  J.  Zwezdaryk,  Suzanne  L...cancer  cells.  Mol  Cancer  Res  2009,  7:907-­‐915.2755540 4. Coffelt  SB,  Waterman  RS,   Florez  L,  Honer  zu...66: 6807–6815. 49. Coffelt SB, Waterman RS, Florez L, Honer zu Bentrup K, Zwezdaryk KJ, et al. (2008) Ovarian cancers overexpress the antimicrobial

  2. Practical implications for nurses caring for patients being treated for osteoporosis

    Directory of Open Access Journals (Sweden)

    Smeltzer SC

    2014-05-01

    Full Text Available Suzanne C Smeltzer, Bing Bing QiCenter for Nursing Research, College of Nursing, Villanova University, Villanova, PA, USAAbstract: Osteoporosis is a major health problem throughout the world. Despite the serious consequences of osteoporosis and fractures, many people with low bone mass and those with osteoporosis are unaware of it, and as a result are not taking preventive actions and are receiving no treatment. Nurses have a major role in prevention, assessment, and teaching related to osteoporosis. This review presents what is currently known about osteoporosis and identifies specific activities that fall within the scope of nursing practice. Evidence-based recommendations are presented and summarized.Keywords: nursing, osteoporosis, treatment, implications

  3. Theory buried under heavy description

    Directory of Open Access Journals (Sweden)

    Vivian B. Martin Ph.D.

    2010-12-01

    Full Text Available In journalism when a reporter puts the main news or point of the story deep down in the text, we say she’s buried the lead, the lead being the main point of the story and usually the first paragraph. In Children in Genocide: extreme traumatization and affect regulation, psychoanalyst Suzanne Kaplan buries her theory. Her study of the after effects of trauma among Holocaust survivors who were children during their persecution and survivors of atrocities during the Rwandan atrocities of the 1990s, is filled with highly descriptive material from the many interviews that serve as data. An interesting grounded theory is peeking out from under all the disciplinary discourse and historical background one must read through to get to what grounded theory readers will consider the juicy parts: concepts on affect regulation in trauma survivors.

  4. Doris Bonnet et Laurence Pourchez, Du soin au rite dans l'enfance

    OpenAIRE

    Cadart, Marie-Laure

    2009-01-01

    En octobre 2000, se tenait à Paris, à l’IRD, un passionnant colloque « Soins et rites. Approches interdisciplinaires de l’enfance » (cf Bulletin d’Amades n° 44). Organisé par le Groupement de Recherche Interdisciplinaire du CNRS « Anthropologie de l’enfance », il a constitué en quelque sorte le point d’orgue de ce groupe de recherche qui se réunissait au cours d’un séminaire mensuel au Museum d’Histoire naturelle organisé par Doris Bonnet, Suzanne Lallemand et Alain Epelboin. L’ambiance convi...

  5. Violence in Pop-Culture Media and The Hunger Games as a Prime Artifact

    Directory of Open Access Journals (Sweden)

    Jenna Benson

    2014-10-01

    Full Text Available This paper uses the Critical Discourse Analysis (CDA methodology to analyze the meanings conveyed in relation to violence in Suzanne Collins' popular novel The Hunger Games and its film. As a representational popular­culture artifact marketed to young adults and teens, it is a primary example for the exposure of this age group to the levels of violence regularly displayed in contemporary popular media. This analysis seeks to critique the assertion that the types of violent exposure in the novel and the film are possibly inappropriate for the audience targeted. A new wave of attention and awareness on the part of producers of popular media and people of contemporary society alike is necessary.

  6. Thinking in time an introduction to Henri Bergson

    CERN Document Server

    Guerlac, Suzanne

    2006-01-01

    "In recent years, we have grown accustomed to philosophical language that is intensely self-conscious and rhetorically thick, often tragic in tone. It is enlivening to read Bergson, who exerts so little rhetorical pressure while exacting such a substantial effort of thought. . . . Bergson's texts teach the reader to let go of entrenched intellectual habits and to begin to think differently—to think in time. . . . Too much and too little have been said about Bergson. Too much, because of the various appropriations of his thought. Too little, because the work itself has not been carefully studied in recent decades."—from Thinking in TimeHenri Bergson (1859–1941), whose philosophical works emphasized motion, time, and change, won the Nobel Prize for Literature in 1927. His work remains influential, particularly in the realms of philosophy, cultural studies, and new media studies. In Thinking in Time, Suzanne Guerlac provides readers with the conceptual and contextual tools necessary for informed appreciati...

  7. ASACUSA hits antiproton jackpot

    CERN Multimedia

    2001-01-01

    The Japanese-European ASACUSA collaboration, which takes its name from the oldest district of Tokyo, approaches the antimatter enigma in a different way from the other two AD experiments, by inserting antiprotons into ordinary atoms. Last month the collaboration succeeded in trapping about a million antiprotons. The ASACUSA antiproton trap (lower cylinder), surmounted by its liquid helium reservoir. Looking on are Ken Yoshiki-Franzen, Zhigang Wang, Takahito Tasaki, Suzanne Reed, John Eades, Masaki Hori, Yasunori Yamazaki, Naofumi Kuroda, Jun Sakaguchi, Berti Juhasz, Eberhard Widmann and Ryu Hayano. A key element of the ASACUSA apparatus is its decelerating Radiofrequency Quadrupole magnet, RFQD. After tests with protons in Aarhus, this was installed in ASACUSA's antiproton beam last October (Bulletin 41/2000, 9 October 2000). Constructed by Werner Pirkl's group in PS Division, the RFQD works by applying an electric field to the AD antiproton pulse the opposite direction to its motion. As the antiprotons slo...

  8. Barriers to effective treatment of vaginal atrophy with local estrogen therapy

    Directory of Open Access Journals (Sweden)

    Reiter S

    2013-03-01

    Full Text Available Suzanne ReiterMid-County Health Center, Largo, FL, USAAbstract: Vaginal atrophy is a common condition among postmenopausal women, among whom many exhibit both vulvovaginal symptoms (eg, dryness, irritation, itching, and pain with intercourse and urinary symptoms (eg, increased frequency, urgency, incontinence, urinary tract infections, and dysuria. Unfortunately, few women with symptoms of vaginal atrophy report seeking treatment from a health care provider. The goal of this article is to examine reasons why patients and health care providers do not engage in discourse regarding this important topic. It is important to initiate conversations with postmenopausal women and counsel them on both why the changes occur and potential treatment options.Keywords: local estrogen therapy, vaginal atrophy, barriers, postmenopausal women

  9. Le Bertillonnage à New York : professionnalisation et image de la police (1896-1914

    Directory of Open Access Journals (Sweden)

    Yann Philippe

    2011-05-01

    Full Text Available « Tu ne peux pas t’imaginer à quel point tu es célèbre là-bas [aux États-Unis]. Même les gens les plus humbles, lorsqu’ils voyaient ou entendaient mon nom, me demandaient si j’avais quelque parenté avec l’illustre auteur des impressions digitales, car de tous tes travaux, c’est là-bas le plus populaire. […]. Cela m’a valu beaucoup de considération de toutes parts ».Dans un livre consacré à la mémoire de son oncle, Suzanne Bertillon rapporte ainsi des propos que son père aurait tenus à Alphons...

  10. Revisiting Dystopia: the Reality Show Biopolitics of "The Hunger Games"

    Directory of Open Access Journals (Sweden)

    Fani Cettl

    2015-10-01

    Full Text Available This paper explores the dystopian imaginaries of the recent popular novel trilogy The Hunger Games by Suzanne Collins and its film adaptations. Having put the narrative into a genealogy of dystopian fiction concerned with the historical nation-state totalitarianisms, I ask what is specifically contemporary about The Hunger Games. I explore this by focusing on the functioning of the reality show format in the narrative, which I link to G. Agamben’s understanding of the spectacle, as part of his wider biopolitical theories. I apply an Agambenian biopolitical reading to the narrative, seeing it as a production of bare life through the camp of the reality show arena. I suggest that The Hunger Games offer a critique of contemporary liberal democracies by calling attention to their production of underclassed and expendable life, which is imagined as an eruption of the nation-state right to kill, similarly as in Agamben’s theories.

  11. L’affaire de la Religieuse de Rivette (1965-1967 “The Nun”, a film by Jacques Rivette

    Directory of Open Access Journals (Sweden)

    Sabine Rousseau

    2012-06-01

    Full Text Available Suzanne Simonin, la religieuse de Diderot, film de Jacques Rivette, réalisateur lié aux Cahiers du cinéma et à la Nouvelle Vague, a été censuré par le pouvoir gaulliste en 1966. Quel est le rôle de l’Eglise catholique dans cette interdiction ? A l’intérieur de l’institution, les avis sont partagés. Le père Jean Pihan et Pierre Goursat de l’Office catholique du cinéma, de la radio et la télévision, ont œuvré à cette interdiction en mobilisant les religieuses de l’Union des supérieures majeures. Pour eux, la défense de la morale est une priorité absolue. Mais d’autres chrétiens comme Marc Oraison et Françoise Vandermeersch estiment au contraire que la censure est inutile et que les films doivent être appréciés pour leur valeur esthétique.Suzanne Simonin, la religieuse de Diderot, a film byJacques Rivette, a director connected with LaNouvelle Vague and Les cahiers du cinéma, was censored in 1966 under de Gaulle's presidency. What role did the CatholicChurch play in this decision? Among Christians, there were two different attitudes. Father Jean Pihan and Pierre Goursat from the Office catholique du cinéma, de la radio et de la télévision, rallied the nuns from the Union des supérieures majeures against the film. According to them, morality had to be saved. On the contrary, other Christians, such as Marc Oraison and Françoise Vandermeersch, thought that censorship was useless and that films must be appreciated for their aesthetic qualities.

  12. Hacia una descripción del rol discursivo ejercido por los participantes de una conversación polilógica del español de Santiago de Chile

    Directory of Open Access Journals (Sweden)

    Viviana Unda D.

    2003-09-01

    Full Text Available Dada la relevancia del rol discursivo de los participantes de una conversación en el fenómeno de la alternancia del turno, ofrecemos una propuesta para describir los roles de discurso ejercidos por los interlocutores al llevar a cabo tal evento comunicativo. El método empleado para elaborar esta descripción se basa en los postulados de Suzanne Eggins y Diane Slade 1997. Los datos empíricos utilizados forman parte de una conversación llevada a cabo por cuatro interlocutores en el programa televisivo "Tolerancia Cero", transmitido por el canal chileno de televisión abierta Chilevisión el día 28 de mayo de 2000 y cuyo objetivo es comentar semanalmente los temas de actualidad nacional e internacional más relevantes. Las consideraciones presentadas en este artículo forman parte de la tesis de Magíster en Lingüística (Pontificia Universidad Católica de Chile, junio 2003. (Considering the importance that the discursive role of the participants in a conversation holds in the phenomenon of turn taking, we offer a proposal for describing the discursive roles practiced by the interlocutors during such communicative event. The method employed to develop this description is based on the principles proposed by Suzanne Eggins and Diane Slade 1997.The empirical data were taken from a conversation by four interlocutors in the TV show "Tolerancia Cero", broadcasted by Chilevisión, an open Chilean channel, on May 28, 2000. Its main purpose is to comment weekly on relevant national and international topics. The ideas presented in this article are part of the author’s thesis for a M.A. degree in Linguistics (Pontificia Universidad Católica de Chile, June 2003.

  13. Mesospheric turbulence detection and characterization with AMISR-class radars under consistent meteorological conditions

    Science.gov (United States)

    Li, J.; Collins, R. L.; Newman, D.; Nicolls, M. J.; Varney, R. H.; Thurairajah, B.

    2015-12-01

    A recent study has shown the ability of the Advanced Modular Incoherent Scatter Radar (AMISR) at Poker Flat Research Range (PFRR, PFISR) to characterize turbulence in the mesosphere (D-Region) [Nicolls et. al, 2011]. We present case studies of AMISR measurements of turbulence where the meteorological conditions are defined by the presence of persistent Mesospheric Inversion Layers (MILs). We consider MILs that are detected by satellite over a day and are also detected by Rayleigh lidar at PFRR [Irving et. al, 2014]. MILs are a signature of large-scale planetary wave breaking in the upper atmosphere, where a region with a temperature inversion lies below a region with an adiabatic lapse rate. The region with the inversion allows small-scale waves to become unstable, break, and generate turbulence. The region with the adiabatic lapse rate is indicative of a well-mixed layer and the presence of turbulence. AMISR-class radars have a steerable narrow beam (1°) and high vertical resolution (750 m). We review the principles and practices of incoherent scatter radar with a focus on detection of D-region turbulence using radar spectra. We present the geometry of the turbulence and the radar, comparing the turbulent, plasma, and radar spatial scales. We develop a turbulence retrieval algorithm using a Voigt function spectral line. We fit the spectra to a Voigt function using the Levenberg-Marquardt method and use the Gaussian component of the Voigt spectra to calculate the RMS velocity, and hence the turbulent energy dissipation rate. With the environmental conditions characterized by satellite and lidar and the turbulence characterized by radar data, we can test the ability of PFISR to characterize mesospheric turbulence under consistent meteorological conditions and develop robust technique for turbulence measurements.

  14. Superconductivity Technology Program for electric power systems: Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Marriott, K.B.

    1993-09-01

    Twenty-seven presentations are included in viewgraph form for the wire development panel, applications development panel, and thallium workshop. Authors and affiliations are: (wire development panel) Kreoger/Christen (ORNL), Malozemoff (American Superconductor Corp.), Blaugher (National Renewable Energy Lab.), Haldar (Intermagnetics), Gray/Lanagan/Eror (ANL), Bickel/Voigt/Roth (Sandia), Tkaczyk (GE), Suenaga (BNL), Willis/Korzekwa/Maley (Los Alamos); (applications development panel) Peterson/Stewart (Los Alamos), Iwasa (BNL), Hull/Nieman (ANL), Murphy/DeGregoria (ORNL), Hazelton (Intermagnetics), Dykhuizen (Sandia); (thallium workshop) Goodrich (NIST), Blaugher (NREL), Roth (Sandia), Holstein (DuPont), Paranthaman (ORNL), and Willis (Los Alamos).

  15. Broadening of a spectrum line by finite spectrometer resolution. [FORTRAN IV; SAL, KAL

    Energy Technology Data Exchange (ETDEWEB)

    Engleman, R. Jr.

    1978-12-01

    The distortion of a spectrum line by the finite resolving power of a spectrometer is discussed in terms of a mathematical model. Particular attention is given to the case where either a Gaussian or Cauchy slit function broadens an isolated Doppler, Lorentz, or Voigt absorption line. Corrections to the peak absorption, the line width, and the integrated absorption coefficient are calculated and discussed for different combinations of slit functions and line shapes. Several new series expansions for the corrections are derived. Two general FORTRAN IV programs that calculate these corrections are described and some sample correction curves are given. 27 references.

  16. La teoría de la relatividad: ayer y hoy

    OpenAIRE

    Cervantes-Cota, Jorge L.; M.A. Rodríguez-Meza

    2006-01-01

    Explicamos los dos postulados dela teoría de la relatividad especial, poniendo énfasis en los conocimientos científicos históricos detrás de las ideas que empleó el joven Albert Einstein en 1905. El papel de científicos como Maxwell, Michelson, Voigt, Lorentz, Fitzgerald, entre otros, es dilucidado. También explicamos la geometría del nuevo espacio-tiempo que emana de la teoría, así como las consecuencias en la medición del espacio, tiempo y masas de observadores en movimiento relativo. Fina...

  17. A THREE-DIMENSIONAL SOLUTION FOR LAMINATED ORTHOTROPIC RECTANGULAR PLATES WITH VISCOELASTIC INTERFACES

    Institute of Scientific and Technical Information of China (English)

    Yan Wei; Ying Ji; Chen Weiqiu

    2006-01-01

    When a body consists completely or even partly of viscoelastic materials, its response under static loading will be time-dependent. The adhesives used to glue together single plies in laminates usually exhibit a certain viscoelastic characteristic in a high temperature environment. In this paper, a laminated orthotropic rectangular plate with viscoelastic interfaces,described by the Kelvin-Voigt model, is considered. A power series expansion technique is adopted to approximate the time-variation of various field quantities. Results indicate that the response of the laminated plate with viscoelastic interfaces changes remarkably with time, and is much different from that of a plate with spring-like or viscous interfaces.

  18. Loss tangent imaging: Theory and simulations of repulsive-mode tapping atomic force microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Proksch, Roger [Asylum Research, Santa Barbara, California 93117 (United States); Yablon, Dalia G. [ExxonMobil Research and Engineering, Annandale, New Jersey (United States)

    2012-02-13

    An expression for loss tangent measurement of a surface in amplitude modulation atomic force microscopy is derived using only the cantilever phase and the normalized cantilever amplitude. This provides a direct measurement of substrate compositional information that only requires tuning of the cantilever resonance to provide quantitative information. Furthermore, the loss tangent expression incorporates both the lost and stored energy into one term that represents a fundamental interpretation of the phase signal in amplitude modulation imaging. Numerical solutions of a cantilever tip interacting with a simple Voigt modeled surface agree with the derived loss tangent to within a few percent.

  19. Investigation of radial temperature gradients in diode pumped alkali lasers using tunable diode laser absorption spectroscopy

    Science.gov (United States)

    Fox, Charles D.; Perram, Glen P.

    2012-03-01

    Heat loads in Diode Pumped Alkali Lasers (DPAL) have been investigated using a diode laser to probe the radial dependence of the absorbance. A TiS pump laser heats the medium in a T=50-100°C cesium heat pipe with 5 Torr nitrogen used for quenching. A tunable diode laser probes the spectral absorbance of the cesium cell. Local alkali concentration, temperature, and saturation broadening modify Voigt lineshapes in the wing of the hyperfine split lines. The temperature within the pumped volume exceeds the wall temperature by almost 200 C.

  20. Notes on continuum mechanics

    CERN Document Server

    Chaves, Eduardo W V

    2013-01-01

    This publication is aimed at students, teachers, and researchers of Continuum Mechanics and focused extensively on stating and developing Initial Boundary Value equations used to solve physical problems. With respect to notation, the tensorial, indicial and Voigt notations have been used indiscriminately.   The book is divided into twelve chapters with the following topics: Tensors, Continuum Kinematics, Stress, The Objectivity of Tensors, The Fundamental Equations of Continuum Mechanics, An Introduction to Constitutive Equations, Linear Elasticity, Hyperelasticity, Plasticity (small and large deformations), Thermoelasticity (small and large deformations), Damage Mechanics (small and large deformations), and An Introduction to Fluids. Moreover, the text is supplemented with over 280 figures, over 100 solved problems, and 130 references.

  1. Michelson Interferometer characterisation of noise reduction in DFB fibre lasers

    Science.gov (United States)

    Canagasabey, Albert; Jones, David; Mann, David; Canning, John; Fleming, Simon; Holdsworth, John

    2012-02-01

    A comparison is made between unpackaged and packaged distributed feedback (DFB) fibre lasers using the Michelson interferometer configuration for delayed self-heterodyne interferometery (MIDSHI) to ascertain the improvements to the external environmental noise, quantified by reductions in the Gaussian linewidth. Voigt fitting is used to extract and separate out the Lorentzian and Gaussian linewidth contributions and therefore the associated sources of noise. Significant improvements in the Gaussian linewidth were achieved as a result of significant reductions in the sensitivity of the DFB laser to external perturbations using packaging. However, a broadening of the laser Lorentzian linewidth was observed.

  2. Tunable surface plasmon-polaritons in a gyroelectric slab sandwiched between two graphene layers

    Science.gov (United States)

    Xu, Guoding; Cao, Ming; Liu, Chang; Sun, Jian; Pan, Tao

    2016-05-01

    We study numerically the properties of surface plasmon-polaritons (SPPs) in a gyroelectric slab sandwiched between two graphene layers, where the external static magnetic field is applied in the Voigt geometry. It is shown that the dispersion characteristics and propagation lenghts of the SPPs for both the optical and the acoustic branches can be tuned flexibly by the external magnetic field and graphene's chemical potential, and that the nonreciprocal properties of the SPPs caused by the external magnetic field are rather obvious. The results provide a method for adjusting and improving the dispersion and propagation properties of the SPPs, which might be helpful for the design of the related plasmonic devices.

  3. A line-broadening analysis model for the microstructural characterization of nanocrystalline materials from asymmetric x-ray diffraction peaks.

    Science.gov (United States)

    Pantoja-Cortés, Juan; Sánchez-Bajo, Florentino; Ortiz, Angel L

    2012-05-30

    Nanograin sizes and crystal lattice microstrains in nanocrystalline materials are typically evaluated from the broadening of their x-ray diffraction (XRD) peaks under the assumption of symmetrical diffraction profiles. Since this assumption is not entirely satisfactory, we formulate a line-broadening analysis model of a single peak that considers explicitly the XRD peak asymmetry. The model is a generalization of the variance method in which the shape of the XRD peaks is idealized through asymmetrical split pseudo-Voigt functions. The model is validated on two nanocrystalline powders.

  4. Single-color, in situ photolithography marking of individual CdTe/ZnTe quantum dots containing a single Mn{sup 2+} ion

    Energy Technology Data Exchange (ETDEWEB)

    Sawicki, K.; Malinowski, F. K.; Gałkowski, K.; Jakubczyk, T.; Kossacki, P.; Pacuski, W.; Suffczyński, J., E-mail: Jan.Suffczynski@fuw.edu.pl [Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5 St., PL-02-093 Warsaw (Poland)

    2015-01-05

    A simple, single-color method for permanent marking of the position of individual self-assembled semiconductor Quantum Dots (QDs) at cryogenic temperatures is reported. The method combines in situ photolithography with standard micro-photoluminescence spectroscopy. Its utility is proven by a systematic magnetooptical study of a single CdTe/ZnTe QD containing a Mn{sup 2+} ion, where a magnetic field of up to 10 T in two orthogonal, Faraday and Voigt, configurations is applied to the same QD. The presented approach can be applied to a wide range of solid state nanoemitters.

  5. Energy density and energy flow of magnetoplasmonic waves on graphene

    Science.gov (United States)

    Moradi, Afshin

    2017-03-01

    By means the linearized magnetohydrodynamic theory, expressions for energy density and energy flow are derived for the p-polarized surface magnetoplasmon polaritons on graphene in the Voigt configuration, where a static magnetic field is normal to the graphene surface. Numerical results show that the external magnetic field has significant impact on the energy density and energy transport velocity of magnetoplasmon waves in the long-wavelength region, while total power flow vary only weakly with magnetostatic field. The velocity of energy propagation is proved to be identical with group velocity of the surface waves.

  6. LQR Control of Shell Vibrations Via Piezoceramic Actuators

    Science.gov (United States)

    delRosario, R. C. H.; Smith, R. C.

    1997-01-01

    A model-based Linear Quadratic Regulator (LQR) method for controlling vibrations in cylindrical shells is presented. Surface-mounted piezo-ceramic patches are employed as actuators which leads to unbounded control input operators. Modified Donnell-Mushtari shell equations incorporating strong or Kelvin-Voigt damping are used to model the system. The model is then abstractly formulated in terms of sesquilinear forms. This provides a framework amenable for proving model well-posedness and convergence of LQR gains using analytic semigroup results combined with LQR theory for unbounded input operators. Finally, numerical examples demonstrating the effectiveness of the method are presented.

  7. Nutritional significance of a winter-flowering succulent for opportunistic avian nectarivores

    CSIR Research Space (South Africa)

    Symes, CT

    2010-01-01

    Full Text Available Pycnonotus nigricans and Cape White-eyes Zosterops capensis. In both these species, the d13C of breath samples was significantly enriched compared with blood and feathers, and closely resembled that of the nectar, revealing combustion of ingested nectar... CO2 (Carleton et al. 2004, 2006, Voigt et al. 2008a, 2008b). Because of the potential for such isotopic routing in birds feeding on A. marlothii nectar, we investigated tissues with differing turnover rates, namely feathers, blood and breath...

  8. Temperature-dependent gelation process in colloidal dispersions by diffusing wave spectroscopy.

    Science.gov (United States)

    Liu, Jiaxue; Boyko, Volodymyr; Yi, Zhiyong; Men, Yongfeng

    2013-11-19

    Temperature-dependent microrheology of a concentrated charge-stabilized poly(methyl methacrylate) colloidal dispersion with different salt concentrations was investigated by diffusing wave spectroscopy in backscattering mode. The critical temperature where the system undergoes aggregation and gelation depends upon the particle volume fraction or salt concentration. The viscoelastic properties of the systems have been discussed using Maxwell and Kelvin-Voigt models. Temperature-dependent crossover (G' = G″) frequency has been used to calculate activation energies representing a critical energy of interaction of gel formation.

  9. Superconductivity Technology Program for electric power systems: Proceedings

    Energy Technology Data Exchange (ETDEWEB)

    Marriott, K.B.

    1993-09-01

    Twenty-seven presentations are included in viewgraph form for the wire development panel, applications development panel, and thallium workshop. Authors and affiliations are: (wire development panel) Kreoger/Christen (ORNL), Malozemoff (American Superconductor Corp.), Blaugher (National Renewable Energy Lab.), Haldar (Intermagnetics), Gray/Lanagan/Eror (ANL), Bickel/Voigt/Roth (Sandia), Tkaczyk (GE), Suenaga (BNL), Willis/Korzekwa/Maley (Los Alamos); (applications development panel) Peterson/Stewart (Los Alamos), Iwasa (BNL), Hull/Nieman (ANL), Murphy/DeGregoria (ORNL), Hazelton (Intermagnetics), Dykhuizen (Sandia); (thallium workshop) Goodrich (NIST), Blaugher (NREL), Roth (Sandia), Holstein (DuPont), Paranthaman (ORNL), and Willis (Los Alamos).

  10. Utilizing Near-IR Tunable Laser Absorption Spectroscopy to Study Detonation and Combustion Systems

    Science.gov (United States)

    2014-03-27

    constant, defined as c2 = hc/k, where h is Planks constant, c is the speed of light, and k is Boltzmann’s constant. The HITEMP database provides values for...and Lorentzian have FWHM of 0.3 cm−1, and the resulting Voigt profile from their convolution has an approximate full width half max of 1.0 cm−1. (a...interpolations (of the mins and maxes ) was considered to be the baseline and was subtracted from the non-smoothed spectrum. This method worked well for

  11. Characterization of Wave Dispersion in Viscoelastic Cellular Assemblies by Doublet Mechanics

    Institute of Scientific and Technical Information of China (English)

    JIN Yan-Fang; XIONG Chun-Yang; FANG Jing; FERRARI Mauro

    2009-01-01

    Using the Voigt model, we analyze wave propagation in viscoelastic granular media with a monatomic lattice, planar simple cubic package and cubical-tetrahedral assembly within the context of doublet mechanics. Microstrains of elongation between the doublet particles are considered in the models. Wave dispersive relations are derived from dynamic equations of the particles involved in the media, and phase velocities and attenuations of the dispersive waves are obtained for the different assemblies. Variations in these dispersion characteristics are analyzed with the changes of cell interval, modulus, and wave frequency. The relations between micro-constants and macro-parameters are presented under the condition of non-scale continuity of the media.

  12. Comment on "Surface electromagnetic wave equations in a warm magnetized quantum plasma" [Phys. Plasmas 21, 072114 (2014)

    Science.gov (United States)

    Moradi, Afshin

    2016-07-01

    In a recent article [C. Li et al., Phys. Plasmas 21, 072114 (2014)], Li et al. studied the propagation of surface waves on a magnetized quantum plasma half-space in the Voigt configuration (in this case, the magnetic field is parallel to the surface but is perpendicular to the direction of propagation). Here, we present a fresh look at the problem and obtain a new form of dispersion relation of surface waves of the system. We find that our new dispersion relation does not agree with the result obtained by Li et al.

  13. Soft-film dynamics of SH-SAW sensors in viscous and viscoelastic fluids

    Directory of Open Access Journals (Sweden)

    A. Vikström

    2016-12-01

    Full Text Available We theoretically investigate surface acoustic waves with horizontal polarization (SH-SAWs propagating in a three-layer system consisting of an elastic substrate and two viscoelastic overlayers. For the limiting case of an acoustically thin middle layer and an infinite top layer, we derive analytical expressions for the phase velocity shift and the wave attenuation. These expressions demonstrate the importance of taking into account the viscoelastic coupling between the two overlayers. Numerical calculations using a combined Maxwell/Voigt scheme confirm our analytical results and also indicate that it is possible for viscoelasticity to cause SH-SAWs to vanish.

  14. Spectroscopy underlying microwave remote sensing of atmospheric water vapor

    Science.gov (United States)

    Tretyakov, M. Yu.

    2016-10-01

    The paper presents a spectroscopist's view on the problem of recovery of the atmosphere humidity profile using modern microwave radiometers. Fundamental equations, including the description of their limitations, related to modeling of atmospheric water vapor absorption are given. A review of all reported to date experimental studies aimed at obtaining corresponding numerical parameters is presented. Best estimates of these parameters related to the Voigt (Lorentz, Gross, Van Vleck - Weisskopf and other equivalent) profile based modeling of the 22- and 183-GHz water vapor diagnostic lines and to non-resonance absorption as well as corresponding uncertainties are made on the basis of their comparative analysis.

  15. Pull-in control due to Casimir forces using external magnetic fields

    CERN Document Server

    Esquivel-Sirvent, R; Cocoletzi, G H

    2009-01-01

    We present a theoretical calculation of the pull-in control in capacitive micro switches actuated by Casimir forces, using external magnetic fields. The external magnetic fields induces an optical anisotropy due to the excitation of magneto plasmons, that reduces the Casimir force. The calculations are performed in the Voigt configuration, and the results show that as the magnetic field increases the system becomes more stable. The detachment length for a cantilever is also calculated for a cantilever, showing that it increases with increasing magnetic field. At the pull-in separation, the stiffness of the system decreases with increasing magnetic field.

  16. The role of magnetoplasmons in Casimir force calculations

    CERN Document Server

    Esquivel-Sirvent, R; Palomino-Ovando, M A; Cocoletzi, G H

    2009-01-01

    In this paper we review the role of magneto plasmon polaritons in the Casimir force calculations. By applying an external constant magnetic field a strong optical anisotropy is induced on two parallel slabs reducing the reflectivity and thus the Casimir force. As the external magnetic field increases, the Casimir force decreases. Thus, with an an external magnetic field the Casimir force can be controlled.The calculations are done in the Voigt configuration where the magnetic field is parallel to the slabs. In this configuration the reflection coefficients for TE and TM modes do not show mode conversion.

  17. Measurement of the electron and ion temperatures by the x-ray imaging crystal spectrometer on joint Texas experimental tokamak

    Science.gov (United States)

    Yan, W.; Chen, Z. Y.; Jin, W.; Lee, S. G.; Shi, Y. J.; Huang, D. W.; Tong, R. H.; Wang, S. Y.; Wei, Y. N.; Ma, T. K.; Zhuang, G.

    2016-11-01

    An x-ray imaging crystal spectrometer has been developed on joint Texas experimental tokamak for the measurement of electron and ion temperatures from the Kα spectra of helium-like argon and its satellite lines. A two-dimensional multi-wire proportional counter has been applied to detect the spectra. The electron and ion temperatures have been obtained from the Voigt fitting with the spectra of helium-like argon ions. The profiles of electron and ion temperatures show the dependence on electron density in ohmic plasmas.

  18. 精品赏析

    Institute of Scientific and Technical Information of China (English)

    欧南

    2014-01-01

    <正>瓦格纳《众神的黄昏》Richard Wagner-Gotterdammerung演唱:德波拉·弗艾特(Deborah Voigt)杰·亨特·莫里斯(Jay Hunter Morris)艾恩·帕特森(Lain Paterson)汉斯-彼得·金(Hans-peter Konig)温蒂·布莱恩·哈默(Wendy Bryn Harmer)伴奏:大都会歌剧院管弦乐团(The Metropolitan Opera Orchestra)指挥:法比奥·路易西(Fabio Luisi)编号:0440 073 4842(2DVD)

  19. SMEs, Competition and Entry - A developing country perspective

    DEFF Research Database (Denmark)

    Jensen, Camilla

    . The main research question is why it is so difficult for new entrepreneurs to enter markets, or in other words, why are the barriers to entry seemingly higher in developing countries? Development writers such as Hernando de Soto and Daron Acemoglu suggest that this question is closely related...... such as competition policy. The model is tested using the World Bank's BEEPS dataset which is a repeated cross section survey of firms across countries in development and transition. This data gives access to observe among other firm size and whether firms pay a bribe or not. This data is combined with Stephan Voigt...

  20. Elastic anisotropy in multifilament Nb$_3$Sn superconducting wires

    CERN Document Server

    Scheuerlein, C; Alknes, P; Arnau, G; Bjoerstad, R; Bordini, B

    2015-01-01

    The elastic anisotropy caused by the texture in the Nb3Sn filaments of PIT and RRP wires has been calculated by averaging the estimates of Voigt and Reuss, using published Nb3Sn single crystal elastic constants and the Nb3Sn grain orientation distribution determined in both wire types by Electron Backscatter Diffraction. At ambient temperature the calculated Nb3Sn E-moduli in axial direction in the PIT and the RRP wire are 130 GPa and 140 GPa, respectively. The calculated E-moduli are compared with tensile test results obtained for the corresponding wires and extracted filament bundles.

  1. La teoría de la relatividad: ayer y hoy

    OpenAIRE

    Cervantes-Cota, Jorge L.; M. A. Rodríguez-Meza

    2006-01-01

    Explicamos los dos postulados dela teoría de la relatividad especial, poniendo énfasis en los conocimientos científicos históricos detrás de las ideas que empleó el joven Albert Einstein en 1905. El papel de científicos como Maxwell, Michelson, Voigt, Lorentz, Fitzgerald, entre otros, es dilucidado. También explicamos la geometría del nuevo espacio-tiempo que emana de la teoría, así como las consecuencias en la medición del espacio, tiempo y masas de observadores en movimiento relativo. Fina...

  2. The Role of a Novel Topological Form of the Prion Protein in Prion Disease

    Science.gov (United States)

    2008-07-01

    are characterizing the phenotype of these mice to further our understanding of CtmPrP– meditated neurotoxicity, which we believe will shed new light...Biol 160:529 –539. Hegde RS, Voigt S, Lingappa VR (1998a) Regulation of protein topology by trans-acting factors at the endoplasmic reticulum. Mol...Cell 2:85–91. Hegde RS, Mastrianni JA, Scott MR, Defea KA, Tremblay P, Torchia M, DeArmond SJ, Prusiner SB, Lingappa VR (1998b) A transmembrane form of

  3. Repulsive and Restoring Casimir Forces Based on Magneto-Optical Effect

    Institute of Scientific and Technical Information of China (English)

    ZENG Ran; YANG Ya-Ping

    2011-01-01

    The Casimir force direction tuned by the external magnetic field due to the magneto-optical Voigt effect is investigated. The magneto-optical effect gives rise to the modified frequency-dependent electric permittivity and thus the electromagnetic properties of the materials can be adjusted to satisfy the condition of the formation of repulsive Casimir force. It is found that between the ordinary dielectric slab and magneto-optical material slab, a repulsive force may exist by adjusting the applied magnetic field. The restoring Casimir force can also be obtained if suitable parameter values are taken. For realistic materials, the repulsive and the restoring force is shown to possibly take place at typical distances in microelectromechanical systems.%@@ The Casimir force direction tuned by the external magnetic field due to the magneto-optical Voigt effect is investigated.The magneto-optical effect gives rise to the modified frequency-dependent electric permittivity and thus the electromagnetic properties of the materials can be adjusted to satisfy the condition of the formation of repulsive Casimir force.It is found that between the ordinary dielectric slab and magneto-optical material slab,a repulsive force may exist by adjusting the applied magnetic field.The restoring Casimir force can also be obtained if suitable parameter values are taken.For realistic materials,the repulsive and the restoring force is shown to possibly take place at typical distances in microelectromechanical systems.

  4. - and H_2-BROADENED Line Parameters of Carbon Monoxide in the First Overtone Band

    Science.gov (United States)

    Predoi-Cross, Adriana; Esteki, Koorosh; Naseri, Hossein; Devi, V. Malathy; Smith, Mary Ann H.; Mantz, Arlan; Ivanov, Sergei V.

    2016-06-01

    In this study we have re-analyzed high-resolution spectra of pure CO and CO broadened by hydrogen recorded in the spectral range of the first overtone band. We have used four different line shapes in the multispectrum analysis (Voigt, speed dependent Voigt, Rautian, and Rautian with speed dependence) and compared the resulting line shape parameters. The line mixing coefficients have been calculated using the Exponential Power Gap and the Energy Corrected Sudden scaling laws. A classical approach was applied to calculate CO line widths in CO-H_2 and CO-CO collisions. The formulas of classical impact theory are used for calculation of dipole absorption half-widths along with exact 3D Hamilton equations for simulation of molecular motion. The calculations utilize Monte Carlo averaging over collision parameters and simple interaction potential (Tipping-Herman + electrostatic). Molecules are treated as rigid rotors. The dependences of CO half-widths on rotational quantum number J≤ 24 are computed and compared with measured data at room temperature. V. Malathy Devi et al., J. Mol. Spectrosc. 228 (2004) 580-592. R. G. Gordon, J. Chem. Phys. 44 (1966) 3083-3089; ibid., 45 (1966) 1649-1655. J.-P. Bouanich and A. Predoi-Cross, J. Molec. Structure 742 (2005) 183-190 A. Predoi-Cross, J.-P. Bouanich, D. Chris Benner, A. D. May, and J. R. Drummond, J. Chem. Phys. 113 (2000) 158-168

  5. Rheology of fractal networks

    CERN Document Server

    Patricio, Pedro; Duarte, Jorge; Januario, Cristina

    2015-01-01

    We investigate the rheology of a fractal network, in the framework of the linear theory of viscoelasticity. We identify each segment of the network with a simple Kelvin-Voigt element, with a well defined equilibrium length. The final structure retains the elastic characteristics of a solid or a gel. By considering a very simple regular self-similar structure of segments in series and in parallel, in 1, 2 or 3 dimensions, we are able to express the viscoelasticity of the network as an effective generalised Kelvin-Voigt model with a power law spectrum of retardation times, $\\phi\\sim\\tau^{\\alpha-1}$. We relate the parameter $\\alpha$ with the fractal dimension of the gel. In some regimes ($0<\\alpha<1$), we recover the weak power law behaviours of the elastic and viscous moduli with the angular frequencies, $G'\\sim G''\\sim w^\\alpha$, that occur in a variety of soft materials, including living cells. In other regimes, we find different and interesting power laws for $G'$ and $G''$.

  6. Structural analysis of a carbonated hydroxyapatite by the Rietveld method using different profile functions; Analise estrutural de uma hidroxiapatita carbonatada pelo metodo de Rietveld aplicando funcoes de perfil diferentes

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Jorge C. de [Universidade do Estado do Rio de Janeiro (UERJ), RJ (Brazil). Dept. de Matematica], e-mail: jcaraujo@iprj.uerj.br; Moreira, Elizabeth L.; Moraes, Valeria Conde Alves [Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)], e-mail: beth@cbpf.br, e-mail: conde@cbpf.br; Moreira, Ana Paula D. [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil). Inst. de Quimica. Dept. de Quimica Analitica], e-mail: duarteap@gmail.com

    2008-10-15

    The crystal structure of the synthetic hydroxyapatite with 12.8 ({+-} 0,64) wt. % CO{sub 3}{sup 2-} ion content was analyzed by X-ray diffraction using the Rietveld refinement method employing Pearson VII and pseudo-Voigt functions to fit the X-ray profile. The results obtained for unit cell parameters when compared to pattern hydroxyapatite showed a decrease in the a (=b) parameter and an increase in the c parameter without significant difference between the functions employed. The separation of the anisotropic broadening of reflections originated from unit cell strains indicated that this effect is dominant in reflection line broadening, principally to hkl plans with an interatomic distance lower than 2,24 angstrom. Modifications in the atomic coordinates of C atom were noted mainly in PO{sub 4}{sup 3-} (B site) and OH{sup -} (A site) sites. The average crystallite size in the crystallography axis directions (002 and 300) suggests equi axial morphology. The results obtained to CO{sub 3}{sup 2}- content were 11.72 ({+-} 0,64) wt. % to Pearson VII and 13.20 ({+-} 0,64) wt. % to pseudo-Voigt function. The refinement of the occupancy factors to C atoms in both sites PO{sub 4}{sup 3-}(B) and OH{sup -} (A) indicated higher insertion in phosphate site than hydroxide site. However, the relative occupancy of the C atom observed in the B site is lower than in the A site. (author)

  7. Study of microstructure in vanadium–palladium alloys by X-ray diffraction technique

    Indian Academy of Sciences (India)

    J Ghosh; S K Chattopadhyay; A K Meikap; S K Chatterjee; P Chatterjee

    2007-10-01

    Present study considers microstructural characterization of vanadium-based palladium (V–Pd) alloys, which are widely used in marine environment due to their high corrosion resistance. The X-ray diffraction line profile analysis (XRDLPA) have been used to assess the microstructure in body centred cubic (bcc) V–Pd alloys having four different nominal compositions in wt.%. X-ray diffraction line broadening analysis on V–Pd alloys has been performed by using different methods like the Warren–Averbach, double-Voigt and Rietveld methods. Finally microstructural defect parameters such as domain size (), r.m.s. microstrain 〈 2 〉1/2, twin fault ('), spacing fault () and deformation stacking fault () were evaluated in these alloys by Fourier line shape analysis using Rietveld method in which the X-ray diffraction profiles of these alloys were described by the pseudo-Voigt function to fit the experimental data. From analysis it has been observed that twin fault, ', and the spacing fault, , are totally absent in these bcc alloy systems because the twin fault, ', has been observed to be either negative or very small (within experimental error limit) for these alloy systems and the spacing fault, , appears to be negative. This analysis also revealed that the deformation stacking fault, , is significantly present in this alloy system and increases with Pd content.

  8. Theoretical and revisited experimentally retrieved He-broadened line parameters of carbon monoxide in the fundamental band

    Science.gov (United States)

    Predoi-Cross, A.; Esteki, K.; Rozario, H.; Naseri, H.; Latif, S.; Thibault, F.; Malathy Devi, V.; Smith, M. A. H.; Mantz, A. W.

    2016-11-01

    We report revisited experimentally retrieved and theoretically calculated He-broadened Lorentz half-width coefficients and He- pressure-shift coefficients of 45 carbon monoxide transitions in the 1←0 band. The spectra analyzed in this study were recorded over a range of temperatures between 79 and 296 K. The He-broadened line parameters and their temperature dependences were retrieved using a multispectrum nonlinear least squares analysis program. The line shape models used in this study include Voigt, speed dependent Voigt, Rautian (to take into account confinement narrowing) and Rautian with speed dependence, all with an asymmetric component added to account for weak line mixing effects. We were unable to retrieve the temperature dependence of line mixing coefficients. A classical method was used to determine the He-narrowing parameters while quantum dynamical calculations were performed to determine He-broadening and He-pressure shifts coefficients at different temperatures. The line mixing coefficients were also derived from the exponential power gap law and the energy corrected sudden approximation. The current measurements and theoretical results are compared with other published results, where appropriate.

  9. Rayleigh-Lamb wave propagation on a fractional order viscoelastic plate.

    Science.gov (United States)

    Meral, F Can; Royston, Thomas J; Magin, Richard L

    2011-02-01

    A previous study of the authors published in this journal focused on mechanical wave motion in a viscoelastic material representative of biological tissue [Meral et al., J. Acoust. Soc. Am. 126, 3278-3285 (2009)]. Compression, shear and surface wave motion in and on a viscoelastic halfspace excited by surface and sub-surface sources were considered. It was shown that a fractional order Voigt model, where the rate-dependent damping component that is dependent on the first derivative of time is replaced with a component that is dependent on a fractional derivative of time, resulted in closer agreement with experiment as compared with conventional (integer order) models, such as those of Voigt and Zener. In the present study, this analysis is extended to another configuration and wave type: out-of-plane response of a viscoelastic plate to harmonic anti-symmetric Lamb wave excitation. Theoretical solutions are compared with experimental measurements for a polymeric tissue mimicking phantom material. As in the previous configurations the fractional order modeling assumption improves the match between theory and experiment over a wider frequency range. Experimental complexities in the present study and the reliability of the different approaches for quantifying the shear viscoelastic properties of the material are discussed.

  10. The UVES Large Program for Testing Fundamental Physics II: Constraints on a Change in {\\mu} Towards Quasar HE 0027-1836

    CERN Document Server

    Rahmani, H; Srianand, R; Noterdaeme, P; Petitjean, P; Molaro, P; Whitmore, J B; Murphy, M T; Centurion, M; Fathivavsari, H; D'Odorico, S; Evans, T M; Levshakov, S A; Lopez, S; Martins, C J A P; Reimers, D; Vladilo, G

    2013-01-01

    We present an accurate analysis of the H2 absorption lines from the zabs ~ 2.4018 damped Ly{\\alpha} system towards HE 0027-1836 observed with the Very Large Telescope Ultraviolet and Visual Echelle Spectrograph (VLT/UVES) as a part of the European Southern Observatory Large Programme "The UVES large programme for testing fundamental physics" to constrain the variation of proton-to-electron mass ratio, {\\mu} = mp/me. We perform cross-correlation analysis between 19 individual exposures taken over three years and the combined spectrum to check the wavelength calibration stability. We notice the presence of a possible wavelength dependent velocity drift especially in the data taken in 2012. We use available asteroids spectra taken with UVES close to our observations to confirm and quantify this effect. We consider single and two component Voigt profiles to model the observed H2 absorption profiles. We use both linear regression analysis and Voigt profile fitting where {\\Delta}{\\mu}/{\\mu} is explicitly considered...

  11. Reproducibility of XPS analysis for film thickness of SiO{sub 2}/Si by active Shirley method

    Energy Technology Data Exchange (ETDEWEB)

    Matsumoto, Ryo, E-mail: MATSUMOTO.Ryo@nims.go.jp [National Institute of Technology, Yonago College, Tottori 683-8502 (Japan); Graduate School of Pure and Applied Science, University of Tsukuba, Tsukuba 305-8577 (Japan); National Institute for Materials Science, Tsukuba 305-0044 (Japan); Nishizawa, Yugo; Kataoka, Noriyuki; Tanaka, Hiromi [National Institute of Technology, Yonago College, Tottori 683-8502 (Japan); Yoshikawa, Hideki; Tanuma, Shigeo [National Institute for Materials Science, Tsukuba 305-0044 (Japan); Yoshihara, Kazuhiro [Scienta Omicron, Inc, Tokyo 140-0013 (Japan)

    2016-02-15

    Highlights: • We proposed a new advantage for estimation of XPS background in active Shirley method. • Active Shirley method can estimate a reproducible background without operator dependence. • Active Shirley method demonstrated that the thickness of the SiO{sub 2} film was estimated at 9.71 ± 0.14 nm from noisy Si 2p peaks in the commonly-used range. • We developed practical software including useful GUI with active Shirley method. - Abstract: The active Shirley method has been recently proposed for reproducibly estimating the background and peaks of X-ray photoelectron spectroscopy (XPS) spectra because of its automatic tuning of starting and ending points of the Shirley-type background spectra. This reproducibility is significantly affected not only by a software algorithm of the active Shirley method but also by a choice of the initial ending points or a shape of Voigt function. In this work, we provided an example of the reproducibility of XPS analysis for SiO{sub 2} film (9.2 nm thick) on Si wafer by changing the range of initial ending points or a shape of Voigt function in the active Shirley method. It demonstrated that the thickness of the SiO{sub 2} film was estimated at 9.71 ± 0.14 nm from noisy Si 2p peaks in the commonly-used range.

  12. Uranium M x-ray emission spectrum

    Energy Technology Data Exchange (ETDEWEB)

    Keski-Rahkonen, O.; Krause, M.O.

    1977-03-01

    The uranium M x-ray spectrum from a thick metallic target excited by 12-keV electrons was measured by the PAX (photoelectron spectrometry for the analysis of x rays) technique. Energies of the strongest lines were obtained with an accuracy of 0.1 eV using Ag L..beta../sub 1/ and Ag L..cap alpha../sub 1/ as standards. Widths of the uranium lines were obtained by deconvoluting the measured Voigt profiles, and the experimental values were found to agree satisfactorily with McGuire's Hartree-Slater predictions. Natural widths of 4.0(3) and 3.8(3) eV were derived for the M/sub 4/ and M/sub 5/ levels, respectively, and the energies of the M/sub 4/, M/sub 5/, N/sub 2/, and N/sub 3/ levels in uranium metal were determined. Relative intensities of the M lines were measured, and branching ratios were found to be in fair agreement with relativistic Hartree-Slater predictions. The satellite structures of the M..cap alpha../sub 1/ and M..beta.. lines were interpreted in terms of the pertinent multiple-hole configurations. Finally, an approximate analytic expression for the Voigt half-width and its graphical representation are given.

  13. The VLab repository of thermodynamics and thermoelastic properties of minerals

    Science.gov (United States)

    Da Silveira, P. R.; Sarkar, K.; Wentzcovitch, R. M.; Shukla, G.; Lindemann, W.; Wu, Z.

    2015-12-01

    Thermodynamics and thermoelastic properties of minerals at planetary interior conditions are essential as input for geodynamics simulations and for interpretation of seismic tomography models. Precise experimental determination of these properties at such extreme conditions is very challenging. Therefore, ab initio calculations play an essential role in this context, but at the cost of great computational effort and memory use. Setting up a widely accessible and versatile mineral physics database can relax unnecessary repetition of such computationally intensive calculations. Access to such data facilitates transactional interaction across fields and can advance more quickly insights about deep Earth processes. Hosted by the Minnesota Supercomputing Institute, the Virtual Laboratory for Earth and Planetary Materials (VLab) was designed to develop and promote the theory of planetary materials using distributed, high-throughput quantum calculations. VLab hosts an interactive database of thermodynamics and thermoelastic properties or minerals computed by ab initio. Such properties can be obtained according to user's preference. The database is accompanied by interactive visualization tools, allowing users to repeat and build upon previously published results. Using VLab2015, we have evaluated thermoelastic properties, such as elastic coefficients (Cij), Voigt, Reuss, and Voigt-Reuss-Hill aggregate averages for bulk (K) and shear modulus (G), shear wave velocity (VS), longitudinal wave velocity (Vp), and bulk sound velocity (V0) for several important minerals. Developed web services are general and can be used for crystals of any symmetry. Results can be tabulated, plotted, or downloaded from the VLab website according to user's preference.

  14. Controlling Liquid Release by Compressing Electrospun Nanowebs

    Directory of Open Access Journals (Sweden)

    K.G. Kornev

    2009-09-01

    Full Text Available Electrospun nanowebs with pores ranging from nanometers to micrometers, constitute new materials with enhanced absorbency and ability to retain liquids in pores for a long period of time. These materials can be used as nanofluidic probes collecting minute amount of liquids. However, extraction of liquids from nanofibrous materials presents a problem: menisci in the interfiber pores create very high suction pressure which holds the liquid inside the material. This problem can be resolved if the probe is completely filled with the liquid: menisci at the probe edges become flat to establish a pressure equilibrium with the atmosphere. Therefore, one can take advantage of the nanoweb softness and extract liquid by mechanically deforming the nanowebs. We show that the liquid-saturated nanowebs follow the Voigt-type rheology upon loading. We theoretically explain this behavior and derive the relations between the Voigt phenomenological parameters, nanoweb permeability and compression modulus. We show that the limiting deformations follow the Hooke’s law which assumes linear relation between the extracted volume of liquid and the applied load. Because of this predictable behavior, the nanoweb probes can be engineered to release minute liquid doses upon compression. The developed experimental methodology can be used for characterization of nanostructured materials which otherwise impossible to analyze by using the existing instruments.

  15. Pressure-broadening of water transitions near 7180 cm(-1) by helium isotopes.

    Science.gov (United States)

    Campbell, H M; Havey, D K

    2013-05-15

    In this study, pressure-broadening parameters for several H2O transitions near 7180 cm(-1) are obtained which describe collisions with (3)He and (4)He. The sensitivity of those parameters to choice of theoretical line profile (Galatry vs. Voigt) is investigated. H2O is an important species in atmospheric chemistry and astronomy. Because of this, basic fundamental research, which explores the nature of the H2O spectrum in the presence of different gases of varying physical properties, can provide useful reference data which can be applied in the fields of atmospheric and planetary remote sensing. Measurements were made using an intensity-modulated laser photoacoustic spectrometer. Results from the present work show that Galatry line profiles, with a constrained narrowing parameter, more accurately describe experimental spectra than Voigt profiles over a wide range of experimental pressure conditions. Average pressure-broadening parameters were found to be 0.0216 cm(-1)/atm and 0.0209 cm(-1)/atm for H2O in (3)He and (4)He, respectively, and were compared to a literature model for the mass-dependence of line broadening. Specific values were obtained for each transition with nominal combined uncertainties of 2-6%.

  16. Linear and nonlinear viscoelastic arterial wall models: application on animals

    CERN Document Server

    Ghigo, Arthur; Armentano, Ricardo; Lagrée, Pierre-Yves; Fullana, Jose-Maria

    2016-01-01

    This work deals with the viscoelasticity of the arterial wall and its influence on the pulse waves. We describe the viscoelasticity by a non-linear Kelvin-Voigt model in which the coefficients are fitted using experimental time series of pressure and radius measured on a sheep's arterial network. We obtained a good agreement between the results of the nonlinear Kelvin-Voigt model and the experimental measurements. We found that the viscoelastic relaxation time-defined by the ratio between the viscoelastic coefficient and the Young's modulus-is nearly constant throughout the network. Therefore, as it is well known that smaller arteries are stiffer, the viscoelastic coefficient rises when approaching the peripheral sites to compensate the rise of the Young's modulus, resulting in a higher damping effect. We incorporated the fitted viscoelastic coefficients in a nonlinear 1D fluid model to compute the pulse waves in the network. The damping effect of viscoelasticity on the high frequency waves is clear especiall...

  17. Recent Line-Shape and Doppler Thermometry Studies Involving Transitions in the ν1 +ν3 Band of Acetylene

    Science.gov (United States)

    Hashemi, Robab; Rozario, Hoimonti; Povey, Chad; Garber, Jolene; Derksen, Mark; Predoi-Cross, Adriana

    2014-06-01

    The line positions for transitions in the ν1 +ν3 band are often used as a frequency standard by the telecom industry and also needed for planetary atmospheric studies. Four relevant studies have been recently carried out in our group and will be discussed briefly below. (1) N2-broadened line widths and N2-pressure induced line shifts have been measured for transitions in the ν1 +ν3 band of acetylene at seven temperatures in the range 213333K to obtain the temperature dependences of broadening and shift coefficients. The Voigt and hard-collision line profile models were used to retrieve the line parameters. This study has been published in Molecular Physics, 110 Issue 21/22 (2012) 2645-2663. (2) Six nitrogen perturbed transitions of acetylene within the ν1 +ν3 absorption band have been recorded using a 3-channel diode laser spectrometer. We have examined C2H2 spectra using a hard collision (Rautian) profile over a range of five temperatures (213 K-333 K). From these fits we have obtained the N2-broadening and narrowing coefficients of C2H2 and examined their temperature dependence. The experimentally measured narrowing coefficients have been used to estimate the nitrogen diffusion coefficients. The broadening coefficients and corresponding temperature dependence exponents have also been compared to that of calculations completed using a classical impact approach on an ab initio potential energy surface. We have observed a good agreement between our theoretical and experimental results. This study was published in Canadian Journal of Physics 91(11) 896-905 (2013). (3) An extension of the previous study was to analyze the room temperature for the same six transitions using the Voigt, Rautian, Galatry, RautianGalatry and Correlated Rautian profiles. For the entire pressure range, we have tested the applicability of these line-shape models. Except for Voigt profile, Dicke narrowing effect has been considered in all mentioned line-shape models. The experimental

  18. An evaluation of the safety and efficacy of bimatoprost for eyelash growth in pediatric subjects

    Directory of Open Access Journals (Sweden)

    Borchert M

    2016-03-01

    Full Text Available Mark Borchert,1 Suzanne Bruce,2 David Wirta,3 Steven G Yoelin,4 Sungwook Lee,5 Cheri Mao,5 Amanda VanDenburgh5 1Children’s Hospital Los Angeles, Los Angeles, CA, USA; 2Suzanne Bruce and Associates, PA, Houston, TX, USA; 3David Wirta and Associates, Newport Beach, CA, USA; 4Medical Associates Inc., Newport Beach, CA, USA; 5Allergan plc, Irvine, CA, USA Purpose: Evaluate the safety and effectiveness of bimatoprost 0.03% for treatment of eyelash hypotrichosis in a pediatric population. Patients and methods: This multicenter, randomized, double-masked, parallel-group study was conducted at seven sites in the US and Brazil. Subjects with eyelash hypotrichosis caused by chemotherapy or alopecia areata (aged 5–17 years or healthy adolescents aged 15–17 years were enrolled (N=71. Subjects applied bimatoprost 0.03% or vehicle to upper eyelid margins once nightly for 4 months and were followed for 1 month post-treatment. Eyelash prominence was assessed using the validated 4-grade Global Eyelash Assessment scale with photonumeric guide. Changes in eyelash length, thickness, and darkness were measured by digital image analysis. Safety was assessed by adverse events and ophthalmic observations. Results: Eyelash prominence improved in a significantly greater proportion of subjects treated with bimatoprost compared with vehicle at month 4 (70.8% versus 26.1%; P<0.001. This benefit was sustained at month 5 post-treatment assessment. Digital image analysis measures were significantly improved with bimatoprost. Significant treatment benefits with bimatoprost versus vehicle were evident among the healthy adolescents but not in the postchemotherapy or alopecia areata subgroups. The safety profile of bimatoprost was consistent with previous studies in adults. Conclusion: Bimatoprost was safe and well tolerated in pediatric subjects with eyelash hypotrichosis. In this study with limited sample size, subgroup analyses showed that treatment was effective in

  19. Obituary: Preston F. Gott, 1919-2002

    Science.gov (United States)

    Myles, Charles Wesley

    2003-12-01

    Preston F. Gott, Professor Emeritus of Physics and former Director of the Observatories at Texas Tech University, died 13 January 2002 after a bout with Cancer. Mr. Gott was born 21 November 1919 in Waxahachie (Ellis County) Texas. He received his Bachelor of Science and Master of Arts degrees from the University of Texas at Austin. His first wife, Edna Maynard Gott, passed away in 1986; their two children are Eugene Willard Gott and Edith Suzanne Gott. After his retirement from Texas Tech University in 1989, he married Orene Whitcomb Peddicord, M.D. on 14 May 1991 and they lived in Odessa, Texas. Preston joined the Texas Tech University (TTU) faculty in 1948 and taught physics and astronomy there for 41 years, before retiring in 1989. He was responsible for starting astronomy teaching within the Physics department. He also developed, and taught for many years, a very popular, hands-on photography course in that department. It is due to Preston's persistence and determination that TTU has two astronomy observatories devoted to teaching. Because of his efforts, the on-campus observatory, Igor, was donated to TTU by White Sands Proving Grounds, New Mexico. He is also primarily responsible for obtaining the land, equipment and construction funds for an off campus observatory. In 1991, the TTU Board of Regents named the latter facility the Preston F. Gott Skyview Observatory. He also developed a private Mountainside Observatory in Fort Davis, Texas. Until recently, Preston was listed as a Senior Scientist at NASA's Jet Propulsion Laboratory in Pasadena, CA where he worked several summers on the moon and mars lander projects. In the 1950s and 1960s, he worked several summers at the White Sands Proving Grounds in New Mexico. In that period, he was also a consultant and frequent Visiting Scientist at the Aberdeen Proving Ground in Maryland. Preston was a very generous donor to the Department of Physics and the Texas Tech University. He endowed the Gott Gold Tooth

  20. Elasticity of calcium and calcium-sodium amphiboles

    Science.gov (United States)

    Brown, J. Michael; Abramson, Evan H.

    2016-12-01

    Measurements of single-crystal elastic moduli under ambient conditions are reported for nine calcium to calcium-sodium amphiboles that lie in the composition range of common crustal constituents. Velocities of body and surface acoustic waves measured by Impulsive Stimulated Light Scattering (ISLS) were inverted to determine the 13 moduli characterizing these monoclinic samples. Moduli show a consistent pattern: C33 > C22 > C11 and C23 > C12 > C13 and C44 > C55 ∼ C66 and for the uniquely monoclinic moduli, |C35| ≫ C46 ∼ |C25| > |C15| ∼ 0. Most of the compositionally-induced variance of moduli is associated with aluminum and iron content. Seven moduli (C11C12C13C22C44C55C66) increase with increasing aluminum while all diagonal moduli decrease with increasing iron. Three moduli (C11, C13 and C44) increase with increasing sodium and potassium occupancy in A-sites. The uniquely monoclinic moduli (C15C25 and C35) have no significant compositional dependence. Moduli associated with the a∗ direction (C11C12C13C55 and C66) are substantially smaller than values associated with structurally and chemically related clinopyroxenes. Other moduli are more similar for both inosilicates. The isotropically averaged adiabatic bulk modulus does not vary with iron content but increases with aluminum content from 85 GPa for tremolite to 99 GPa for pargasite. Increasing iron reduces while increasing aluminum increases the isotropic shear modulus which ranges from 47 GPa for ferro-actinolite to 64 GPa for pargasite. These results exhibit far greater anisotropy and higher velocities than apparent in earlier work. Quasi-longitudinal velocities are as fast as ∼9 km/s and (intermediate between the a∗- and c-axes) are as slow as ∼6 km/s. Voigt-Reuss-Hill averaging based on prior single crystal moduli resulted in calculated rock velocities lower than laboratory measurements, leading to adoption of the (higher velocity) Voigt bound. Thus, former uses of the upper Voigt bound can

  1. Measurements of linestrengths, N2-, Ar-, He- and self-broadening coefficients of acetylene in the ν4+ν5 combination band using a cw quantum cascade laser

    KAUST Repository

    Sajid, Muhammad Bilal

    2014-11-01

    Linestrengths, N2-, Ar-, He- and self-broadening coefficients of acetylene have been measured at 296K in the P branch of the ν4+ν5 combination band for 25 rotational transitions. The effect of gas temperature is studied over 296-683K for five transitions to allow the determination of the temperature dependent exponent n for N2- and Ar-broadening coefficients. These measurements were performed using a continuous-wave quantum cascade laser (cw-QCL) operating over 1253-1310cm-1. Spectroscopic parameters were obtained by fitting absorption spectra using Voigt, Galatry and Rautian profiles. Linestrength and broadening results are compared with previous studies available in literature for the ν4+ν5 combination band and other vibrational bands of acetylene. © 2014 Elsevier Ltd.

  2. Effective negative refractive index in ferromagnet-semiconductor superlattices.

    Science.gov (United States)

    Tarkanyan, Roland H; Niarchos, Dimitris G

    2006-06-12

    Problem of anomalous refraction of electromagnetic waves is analyzed in a superlattice which consists of alternating layers of ferromagnetic insulator and nonmagnetic semiconductor. Effective permittivity and permeability tensors are derived in the presence of an external magnetic field parallel to the plane of the layers. It is shown that in the case of the Voigt configuration, the structure behaves as a left-handed medium with respect to TE-type polarized wave, in the low-frequency region of propagation. The relative orientation of the Poynting vector and the refractive wave vector is examined in different frequency ranges. It is shown that the frequency region of existence for the backward mode can be changed using external magnetic field as tuning parameter.

  3. Parametric imaging of viscoelasticity using optical coherence elastography

    Science.gov (United States)

    Wijesinghe, Philip; McLaughlin, Robert A.; Sampson, David D.; Kennedy, Brendan F.

    2015-03-01

    We demonstrate imaging of soft tissue viscoelasticity using optical coherence elastography. Viscoelastic creep deformation is induced in tissue using step-like compressive loading and the resulting time-varying deformation is measured using phase-sensitive optical coherence tomography. From a series of co-located B-scans, we estimate the local strain rate as a function of time, and parameterize it using a four-parameter Kelvin-Voigt model of viscoelastic creep. The estimated viscoelastic strain and time constant are used to visualize viscoelastic creep in 2D, dual-parameter viscoelastograms. We demonstrate our technique on six silicone tissue-simulating phantoms spanning a range of viscoelastic parameters. As an example in soft tissue, we report viscoelastic contrast between muscle and connective tissue in fresh, ex vivo rat gastrocnemius muscle and mouse abdominal transection. Imaging viscoelastic creep deformation has the potential to provide complementary contrast to existing imaging modalities, and may provide greater insight into disease pathology.

  4. Lubrication of soft viscoelastic solids

    CERN Document Server

    Pandey, Anupam; Venner, Kees; Snoeijer, Jacco

    2015-01-01

    Lubrication flows appear in many applications in engineering, biophysics, and in nature. Separation of surfaces and minimisation of friction and wear is achieved when the lubrication fluid builds up a lift force. In this paper we analyse soft lubricated contacts by treating the solid walls as viscoelastic: soft materials are typically not purely elastic, but dissipate energy under dynamical loading conditions. We present a method for viscoelastic lubrication and focus on three canonical examples, namely Kelvin-Voigt-, Standard Linear-, and Power Law-rheology. It is shown how the solid viscoelasticity affects the lubrication process when the timescale of loading becomes comparable to the rheological timescale. We derive asymptotic relations between lift force and sliding velocity, which give scaling laws that inherit a signature of the rheology. In all cases the lift is found to decrease with respect to purely elastic systems.

  5. Quantum-Limited Spectroscopy

    CERN Document Server

    Truong, Gar-Wing; May, Eric F; Stace, Thomas M; Luiten, Andre N

    2015-01-01

    Spectroscopy has an illustrious history delivering serendipitous discoveries and providing a stringent testbed for new physical predictions, including applications from trace materials detection, to understanding the atmospheres of stars and planets, and even constraining cosmological models. Reaching fundamental-noise limits permits optimal extraction of spectroscopic information from an absorption measurement. Here we demonstrate a quantum-limited spectrometer that delivers high-precision measurements of the absorption lineshape. These measurements yield a ten-fold improvement in the accuracy of the excited-state (6P$_{1/2}$) hyperfine splitting in Cs, and reveals a breakdown in the well-known Voigt spectral profile. We develop a theoretical model that accounts for this breakdown, explaining the observations to within the shot-noise limit. Our model enables us to infer the thermal velocity-dispersion of the Cs vapour with an uncertainty of 35ppm within an hour. This allows us to determine a value for Boltzm...

  6. Doppler broadening thermometry of acetylene and accurate measurement of the Boltzmann constant.

    Science.gov (United States)

    Hashemi, R; Povey, C; Derksen, M; Naseri, H; Garber, J; Predoi-Cross, A

    2014-12-07

    In this paper, we present accurate measurements of the fundamental Boltzmann constant based on a line-shape analysis of acetylene spectra in the ν1 + ν3 band recorded using a tunable diode laser. Experimental spectra recorded at low pressures (0.25 - 9 Torr), have been analyzed using a Speed Dependent Voigt model that takes into account the molecular speed dependence effects. This line-shape model reproduces the experimental data with good accuracy and allows us to determine precise line-shape parameters for the P(25) transition of the ν1 + ν3 band. From the recorded spectra we obtained the Doppler-width and then determined the Boltzmann constant, k(B).

  7. A Perturbation Result for Dynamical Contact Problems

    Institute of Scientific and Technical Information of China (English)

    Corinna Klapproth; Peter Deuflhard; Anton Schiela

    2009-01-01

    This paper is intended to be a first step towards the continuous dependence of dynamical contact problems on the initial data as well as the uniqueness of a solution. Moreover, it provides the basis for a proof of the convergence of popular time integration schemes as the Newmark method. We study a frictionless dynamical contact problem between both linearly elastic and viscoelastic bodies which is formulated via the Signorini contact conditions. For viscoelastic materials fulfilling the Kelvin-Voigt constitutive law, we find a characterization of the class of problems which satisfy a perturbation result in a non-trivial mix of norms in function space. This characterization is given in the form of a stability condition on the contact stresses at the contact boundaries. Furthermore, we present perturbation results for two well-established approximations of the classical Signorini condition: The Signorini condition formulated in velocities and the model of normal compliance, both satisfying even a sharper version of our stability condition.

  8. Influence of He+ long-time irradiation on silica luminescence spectrum

    Science.gov (United States)

    Zhurenko, V.; Kalantaryan, O.; Kononenko, S.; Mysiura, I.; Barannik, E.

    2017-09-01

    The paper deals with experimental investigation of 420 keV He+ dose dependence of silica (medium OH-group contents) luminescence. It was founded that experimental spectra were good fitted by two Voigt peaks centered in 2.7 and 1.9 eV. The absorption dose growth influenced on silica ionoluminescence spectra due to increase of radiation defects. We compared the obtained results with 420 keV hydrogen ion irradiation data for the same samples. It was shown that relative intensity of red band correlated with specific energy losses and effective charge of ions in silica. The theoretical simulation of helium ion implantation and intrinsic defect dynamics was performed. The dependence of ionoluminescence intensity on observation angle was measured.

  9. Principal Resonance of Parametrically Excited Moving Viscoelastic Belts with Geometrical Nonlinearity

    Institute of Scientific and Technical Information of China (English)

    侯之超; 祖武争

    2004-01-01

    Nonlinear dynamic analysis is performed on moving belts subjected to geometric nonlinearity and initial tension fluctuation.To incorporate more accurately the damping mechanism of belt material, linear viscoelastic models are adopted in a unified form of differential operators.To circumvent high-order differential vibration equation of time-varying coefficients and with gyroscopic and nonlinear terms, where analytical solution is almost impossible, a systematic approach is presented by reforming the motion equation and directly using the method of multiple scales.To exemplify the procedure, the solutions at principal resonance are obtained and their stability conditions are derived for employing a Kelvin-Voigt model to reflect the property of the belt material.The solutions and stability conditions successfully reduce to those for using Kelvin model and elastic model, which validate the present approaches.Numerical simulations highlight the effects of tension fluctuations and translating speeds on the stability of the belt vibration.

  10. Verification and comparison of four numerical schemes for a 1D viscoelastic blood flow model.

    Science.gov (United States)

    Wang, Xiaofei; Fullana, Jose-Maria; Lagrée, Pierre-Yves

    2015-01-01

    A reliable and fast numerical scheme is crucial for the 1D simulation of blood flow in compliant vessels. In this paper, a 1D blood flow model is incorporated with a Kelvin-Voigt viscoelastic arterial wall. This leads to a nonlinear hyperbolic-parabolic system, which is then solved with four numerical schemes, namely: MacCormack, Taylor-Galerkin, monotonic upwind scheme for conservation law and local discontinuous Galerkin. The numerical schemes are tested on a single vessel, a simple bifurcation and a network with 55 arteries. The numerical solutions are checked favorably against analytical, semi-analytical solutions or clinical observations. Among the numerical schemes, comparisons are made in four important aspects: accuracy, ability to capture shock-like phenomena, computational speed and implementation complexity. The suitable conditions for the application of each scheme are discussed.

  11. Phase-conjugate resonant holographic interferometry applied to NH concentration measurements in a 2D diffusion flame

    Energy Technology Data Exchange (ETDEWEB)

    Tzannis, A.P.; Beaud, P.; Frey, H.M.; Gerber, T.; Mischler, B.; Radi, P.P. [Paul Scherrer Inst. (PSI), Villigen (Switzerland)

    1997-06-01

    Resonant Holographic Interferometry is a method based on the anomalous dispersion of light having a frequency close to an electronic transition of a molecule. We propose a novel single-laser, two-colour setup for recording resonant holograms and apply it to 2D species concentration measurements. The second colour is generated by optical phase-conjugation from Stimulated Brillouin scattering in a cell. Phase-Conjugate Resonant Holographic Interferometry (PCRHI) is demonstrated in a 2D NH{sub 3}/O{sub 2} flame yielding interferograms that contain information on the NH radical distribution in the flame. Experimental results are quantified by applying a numerical computation of the Voigt profiles. (author) 1 fig., 3 refs.

  12. Generation and characterization of OH and O radicals by atmospheric pressure steam/oxygen plasma

    CERN Document Server

    Roy, N C; Alam, M K; Talukder, M R

    2016-01-01

    Atmospheric pressure steam/oxygen plasma is generated by a 88 Hz, 6kV AC power supply. The properties of the produced plasma are investigated by optical emission spectroscopy (OES). The relative intensity, rotational, vibrational, excitation temperatures and electron density are studied as function of applied voltage, electrode spacing and oxygen flow rate. The rotational and vibrational temperatures are determined simulating the bands with the aid of LIFBASE simulation software. The excitation temperature is obtained from the CuI transition taking non-thermal equilibrium condition into account employing intensity ratio method. The electron density is approximated from the H_{\\alpha} Stark broadening using the Voigt profile fitting method. It is observed that the rotational and vibrational temperatures are decreased with increasing electrode spacing and O2 flow rate, but increased with the applied voltage. The excitation temperature is found to increase with increasing applied voltage and O2 flow rate, but de...

  13. Vibrations of a Simply Supported Beam with a Fractional Viscoelastic Material Model – Supports Movement Excitation

    Directory of Open Access Journals (Sweden)

    Jan Freundlich

    2013-01-01

    Full Text Available The paper presents vibration analysis of a simply supported beam with a fractional order viscoelastic material model. The Bernoulli-Euler beam model is considered. The beam is excited by the supports movement. The Riemann – Liouville fractional derivative of order 0 α ⩽ 1 is applied. In the first stage, the steady-state vibrations of the beam are analyzed and therefore the Riemann – Liouville fractional derivative with lower terminal at −∞ is assumed. This assumption simplifies solution of the fractional differential equations and enables us to directly obtain amplitude-frequency characteristics of the examined system. The characteristics are obtained for various values of fractional derivative of order α and values of the Voigt material model parameters. The studies show that the selection of appropriate damping coefficients and fractional derivative order of damping model enables us to fit more accurately dynamic characteristic of the beam in comparison with using integer order derivative damping model.

  14. Theory of wave propagation in magnetized near-zero-epsilon metamaterials: evidence for one-way photonic states and magnetically switched transparency and opacity.

    Science.gov (United States)

    Davoyan, Arthur R; Engheta, Nader

    2013-12-20

    We study propagation of transverse-magnetic electromagnetic waves in the bulk and at the surface of a magnetized epsilon-near-zero (ENZ) medium in a Voigt configuration. We reveal that in a certain range of material parameters novel regimes of wave propagation emerge; we show that the transparency of the medium can be altered with the magnetization leading either to magnetically induced Hall opacity or Hall transparency of the ENZ. In our theoretical study, we demonstrate that surface waves at the interface between either a transparent or an opaque Hall medium and a homogeneous medium may, under certain conditions, be predominantly one way. Moreover, we predict that one-way photonic surface states may exist at the interface of an opaque Hall ENZ and a regular metal, giving rise to the possibility for backscattering immune wave propagation and isolation.

  15. Synthesis of hydroxyapatite and structural refinement by X-ray diffraction; Sintese da hidroxiapatita e refinamento estrutural por difracao de raios-X

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Jorge Correa de [Universidade do Estado do Rio de Janeiro (UERJ), Sao Goncalo, RJ (Brazil). Faculdade de Formacao de Professores; Sena, Lidia [Instituto Nacional de Metrologia, Normalizacao e Qualidade Industrial (INMETRO), Duque de Caxias, RJ (Brazil). Div. de Metrologia de Materiais; Bastos, Ivan Napoleao [Universidade do Estado do Rio de Janeiro (UERJ), Nova Friburgo, RJ (Brazil). Inst. Politecnico]. E-mail: jcaraujo@iprj.uerj.br; Soares, Gloria Dulce de Almeida [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil)

    2007-07-01

    A sample of hydroxyapatite was synthesized and its crystalline structure was analyzed by X-ray diffraction by means of the Rietveld method. Two functions were used to fit the peak profiles, modified Voigt (TCHZ) and Pearson VII. The occupational factors and lattice parameters obtained by both models show that the sample does not contain relevant cationic substitutions. The interatomic distances from Ca1 to oxygens O1, O2 and O3 were adequate for a pure hydroxyapatite without defect at site Ca1. Besides, the use of multiple lines in planes (300) and (002) associated with the model Pearson VII resulted in good agreement with the TCHZ model with respect to the size-strain effects with an ellipsoidal shape of crystallites. In conclusion, the procedures adopted in the synthesis of hydroxyapatite produced a pure and crystalline material. The experimental results of transmission electron microscopy confirmed the predicted shape of crystals. (author)

  16. Investigating the Metallicity Evolution of Sub-damped Lyman alpha Systems

    Science.gov (United States)

    Konchady, Tarini; Jorgenson, Regina

    2017-01-01

    A clear understanding of the production and build up of metals across cosmic time is a key ingredient to any theory of galaxy formation and evolution. We present chemical abundance measurements for a sample of ~20 sub-damped Lyman alpha systems (subDLAs) detected in the absorption spectra of high redshift quasars taken by the Echellette Spectrograph and Imager (ESI) on the Keck II telescope. The sample contains absorbers with neutral hydrogen column densities of 1019.0 Metal line column densities were measured using the apparent optical depth method while neutral hydrogen column densities were measured via Voigt profile fitting. We compare our measurements to those of DLAs and subDLAs from the literature to investigate the potential differences in metallicity evolution between these types of galaxies.

  17. B Free Finite Element Approach for Saturated Porous Media: Consolidation

    Directory of Open Access Journals (Sweden)

    M. M. Stickle

    2016-01-01

    Full Text Available The B free finite element approach is applied to the governing equations describing the consolidation process in saturated poroelastic medium with intrinsically incompressible solid and fluid phases. Under this approach, where Voigt notation is avoided, the finite element equilibrium equations and the linearization of the coupled governing equations are fully derived using tensor algebra. In order to assess the B free approach for the consolidation equations, direct comparison with analytical solution of the response of a homogeneous and isotropic water-saturated poroelastic finite column under harmonic load is presented. The results illustrate the capability of this finite element approach of reproducing accurately the response of quasistatic phenomena in a saturated porous medium.

  18. Consistent treatment of viscoelastic effects at junctions in one-dimensional blood flow models

    Science.gov (United States)

    Müller, Lucas O.; Leugering, Günter; Blanco, Pablo J.

    2016-06-01

    While the numerical discretization of one-dimensional blood flow models for vessels with viscoelastic wall properties is widely established, there is still no clear approach on how to couple one-dimensional segments that compose a network of viscoelastic vessels. In particular for Voigt-type viscoelastic models, assumptions with regard to boundary conditions have to be made, which normally result in neglecting the viscoelastic effect at the edge of vessels. Here we propose a coupling strategy that takes advantage of a hyperbolic reformulation of the original model and the inherent information of the resulting system. We show that applying proper coupling conditions is fundamental for preserving the physical coherence and numerical accuracy of the solution in both academic and physiologically relevant cases.

  19. A Constrained Genetic Algorithm with Adaptively Defined Fitness Function in MRS Quantification

    Science.gov (United States)

    Papakostas, G. A.; Karras, D. A.; Mertzios, B. G.; Graveron-Demilly, D.; van Ormondt, D.

    MRS Signal quantification is a rather involved procedure and has attracted the interest of the medical engineering community, regarding the development of computationally efficient methodologies. Significant contributions based on Computational Intelligence tools, such as Neural Networks (NNs), demonstrated a good performance but not without drawbacks already discussed by the authors. On the other hand preliminary application of Genetic Algorithms (GA) has already been reported in the literature by the authors regarding the peak detection problem encountered in MRS quantification using the Voigt line shape model. This paper investigates a novel constrained genetic algorithm involving a generic and adaptively defined fitness function which extends the simple genetic algorithm methodology in case of noisy signals. The applicability of this new algorithm is scrutinized through experimentation in artificial MRS signals interleaved with noise, regarding its signal fitting capabilities. Although extensive experiments with real world MRS signals are necessary, the herein shown performance illustrates the method's potential to be established as a generic MRS metabolites quantification procedure.

  20. Direct Insights into Observational Absorption Line Analysis Methods of the Circumgalactic Medium Using Cosmological Simulations

    CERN Document Server

    Churchill, Christopher W; Trujillo-Gomez, Sebastian; Kacprzak, Glenn G; Klypin, Anatoly

    2014-01-01

    We study the circumgalactic medium (CGM) of a z=0.54 simulated dwarf galaxy using hydroART simulations. We present our analysis methods, which emulate observations, including objective absorption line detection, apparent optical depth (AOD) measurements, Voigt profile (VP) decomposition, and ionization modelling. By comparing the inferred CGM gas properties from the absorption lines directly to the gas selected by low ionization HI and MgII, and by higher ionization CIV and OVI absorption, we examine how well observational analysis methods recover the "true" properties of CGM gas. In this dwarf galaxy, low ionization gas arises in kiloparsec "cloud" structures, but high ionization gas arises in multiple extended structures spread over 100 kpc; due to complex velocity fields, highly separated structures give rise to absorption at similar velocities. We show that AOD and VP analysis fails to accurately characterize the spatial, kinematic, and thermal conditions of high ionization gas. We find that HI absorption...

  1. Time-Resolved Measurement of the C_2 ^1AΠ u State Population Following Photodissociation of the S_1 State of Acetylene Using Frequency-Modulation Spectroscopy

    Science.gov (United States)

    Du, Zhenhui; Jiang, Jun; Field, Robert W.

    2017-06-01

    The excited-state population of the C_2 ^1AΠ_u state produced in photolysis of S_1 acetylene was investigated. The pulsed UV laser (216.5 nm) excites acetylene into J=8 e-symmetry level of the S_1 3^4 level, and subsequently dissociates the S_1 acetylene into C_2 fragments. A frequency-modulated near-infrared probe laser beam is used to detect the C_2 population in the ^1AΠ_u state. The sensitivity and the fast response of the experimental setup has been verified by I_2 excited state measurements. The setup will be used to record the C_2 A-X transitions, which are fitted with a Voigt function. The derived lineshape and line intensities will be analyzed, and we will use the information to calculate the A state populations of C_2 and map the populations with time-resolution following the photolysis.

  2. Fluid identification in tight sandstone reservoirs based on a new rock physics model

    Science.gov (United States)

    Sun, Jianmeng; Wei, Xiaohan; Chen, Xuelian

    2016-08-01

    To identify pore fluids, we establish a new rock physics model named the tight sandstone dual-porosity model based on the Voigt-Reuss-Hill model, approximation for the Xu-White model and Gassmann’s equation to predict elastic wave velocities. The modeling test shows that predicted sonic velocities derived from this rock physics model match well with measured ones from logging data. In this context, elastic moduli can be derived from the model. By numerical study and characteristic analyzation of different elastic properties, a qualitative fluid identification method based on Poisson’s ratio and the S-L dual-factor method based on synthetic moduli is proposed. Case studies of these two new methods show the applicability in distinguishing among different fluids and different layers in tight sandstone reservoirs.

  3. Elastic properties of antiperovskite-type Ni-rich nitrides MNNi 3 (M=Zn, Cd, Mg, Al, Ga, In, Sn, Sb, Pd, Cu, Ag and Pt) as predicted from first-principles calculations

    Science.gov (United States)

    Bannikov, V. V.; Shein, I. R.; Ivanovskii, A. L.

    2010-11-01

    We have performed accurate ab initio total energy calculations using the full-potential linearized augmented plane wave (FP-LAPW) method with the generalized gradient approximation (GGA) for the exchange-correlation potential to systematically investigate elastic properties of 12 synthesized and hypothetical cubic antiperovskite-type Ni-rich nitrides MNNi 3, where M are Zn, Cd, Mg, Al, Ga, In, Sn, Sb, Pd, Cu, Ag and Pt. As a result, the optimized lattice parameters, independent elastic constants ( Cij), bulk-, shear- and tetragonal shear moduli, Cauchy’s pressure and some indexes of elastic anisotropy, as well as the numerical estimations of Young’s modulus, Poisson’s ratio and Pugh's indicator of brittle/ductile behavior for the corresponding polycrystalline MNNi 3 (in the Voigt-Reuss-Hill approximation) were obtained and analyzed in comparison with the available theoretical and experimental data.

  4. Elastic properties of antiperovskite-type Ni-rich nitrides MNNi{sub 3} (M=Zn, Cd, Mg, Al, Ga, In, Sn, Sb, Pd, Cu, Ag and Pt) as predicted from first-principles calculations

    Energy Technology Data Exchange (ETDEWEB)

    Bannikov, V.V.; Shein, I.R. [Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, 620990 Ekaterinburg (Russian Federation); Ivanovskii, A.L., E-mail: ivanovskii@ihim.uran.r [Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, 620990 Ekaterinburg (Russian Federation)

    2010-11-15

    We have performed accurate ab initio total energy calculations using the full-potential linearized augmented plane wave (FP-LAPW) method with the generalized gradient approximation (GGA) for the exchange-correlation potential to systematically investigate elastic properties of 12 synthesized and hypothetical cubic antiperovskite-type Ni-rich nitrides MNNi{sub 3}, where M are Zn, Cd, Mg, Al, Ga, In, Sn, Sb, Pd, Cu, Ag and Pt. As a result, the optimized lattice parameters, independent elastic constants (C{sub ij}), bulk-, shear- and tetragonal shear moduli, Cauchy's pressure and some indexes of elastic anisotropy, as well as the numerical estimations of Young's modulus, Poisson's ratio and Pugh's indicator of brittle/ductile behavior for the corresponding polycrystalline MNNi{sub 3} (in the Voigt-Reuss-Hill approximation) were obtained and analyzed in comparison with the available theoretical and experimental data.

  5. Switching and propagation of magneto-plasmon-polaritons in magnetic slot waveguides and cavities

    CERN Document Server

    Nikolova, D

    2013-01-01

    The dispersion relations for surface plasmon-polaritons propagating in the Voigt geometry in a metal-insulator-metal waveguide with a magneto-optically active dielectric medium are derived. The symmetry between the upper and lower interfaces is broken by the introduction of the magnetic field; the balance between the field distributions on the two interfaces can be controlled by the applied field. This control is illustrated by finite-element method numerical simulations of the field distributions around a point dipole placed in the centre of the short waveguide; it is shown that both the total emission of radiation from the cavity and the distribution of the far-field radiation can be strongly modified by tuning the magnetisation of the waveguide. This raises the novel possibility of using magnetic fields to control light propagation in nanostructures.

  6. Intensities, broadening and narrowing parameters in the ν3 band of methane

    KAUST Repository

    Es-sebbar, Et-touhami

    2014-12-01

    The P-branch of methane\\'s ν3 band is probed to carry out an extensive study of the 2905-2908cm-1 infrared spectral region. Absolute line intensities as well as N2-, O2-, H2-, He-, Ar- and CO2-broadening coefficients are determined for nine transitions at room temperature. Narrowing parameters due to the Dicke effect have also been investigated. A narrow emission line-width (~0.0001cm-1) difference-frequency-generation (DFG) laser system is used as the tunable light source. To retrieve the CH4 spectroscopic parameters, Voigt and Galatry profiles were used to simulate the measured line shape of the individual transitions.

  7. Absolute Line Intensities in the 2nu3 Band of 16O12C32S

    Science.gov (United States)

    Bermejo; Domenech; Santos; Bouanich; Blanquet

    1997-09-01

    The strengths of 100 lines in the 2nu3 band of 16O12C32S have been measured at high resolution in the spectral range 4069-4118 cm-1, using a tunable difference-frequency laser spectrometer. These intensities were obtained by fitting Voigt profiles to the measured shapes of the lines. The vibrational transition moment [(2.141 ± 0.020) x 10(-2) D] and the absolute intensity (16.19 ± 0.24 cm-2 atm-1 at 296 K) of the 2nu3 band of 16O12C32S are determined from these linestrength measurements. Copyright 1997 Academic Press. Copyright 1997Academic Press

  8. Gold awards for CERN's top suppliers!

    CERN Multimedia

    2003-01-01

    CERN's awards to the LHC project's best suppliers are now into their second year. Three companies received 'Golden Hadrons' for 2003. The Golden Hadron awards were presented to the delighted representatives of the winning firms by LHC Project Leader Lyn Evans on Friday 16 May. Only three out of the LHC's four hundred suppliers were lucky enough to receive a gold award. The consortium IHI (Japan)-Linde Kryotechnik (Switzerland), the Belgian company JDL Technologies and the Japanese firm Furukawa Electric Company were rewarded not only for their technical and financial achievements but also for their compliance with contractual deadlines. The 2003 Golden Hadron winners with Lyn Evans. From left to right: Armin Senn, Thomas Voigt, Kirkor Kurtcuoglu of LINDE KRYOTECHNIK ; Tadaaki Honda, Project Leader and Motoki Yoshinaga, Associate Director of IHI Corporation ; Lyn Evans, LHC Project Leader; Shinichiro Meguro, Managing Director of FURUKAWA ELECTRIC COMPANY ; Nobuyoshi Saji, Consulting Engineer of IHI Corporatio...

  9. Electro-mechanical response of functionally graded beams with imperfectly integrated surface piezoelectric layers

    Institute of Scientific and Technical Information of China (English)

    YAN Wei; CHEN Weiqiu

    2006-01-01

    The time-dependent behavior of a simply-supported functionally graded beam bonded with piezoelectric sensors and actuators is studied using the state-space method. The creep behavior of bonding adhesives between piezoelectric layers and beam is characterized by a Kelvin-Voigt viscoelastic model, which is practical in a high temperature circumstance. Both the host elastic functionally graded beam and the piezoelectric layers are orthotropic and in a state of plane stress, with the former being inhomogeneous along the thickness direction. A laminate model is employed to approximate the host beam. Moreover, the coupling effect between the elastic deformation and electric field in piezoelectric layers is considered. Results indicate that the viscoelastic property of interfacial adhesives has a significant effect on the function of bonded actuators and sensors with time elapsing.

  10. Determination of the symmetries of an experimentally determined stiffness tensor; application to acoustic measurements

    CERN Document Server

    François, Marc Louis Maurice; Berthaud, Yves

    2009-01-01

    For most materials, the symmetry group is known a priori and deduced from the realization process. This allows many simplifications for the measurements of the stiffness tensor. We deal here with the case where the symmetry is a priori unknown, as for biological or geological materials, or when the process makes the material symmetry axis uncertain (some composites, monocrystals). The measurements are then more complicated and the raw stiffness tensor obtained does not exhibit any symmetry in the Voigt's matricial form, as it is expressed in the arbitrarily chosen specimen's base. A complete ultrasonic measurement of the stiffness tensor from redundant measurements is proposed. In a second time, we show how to make a plane symmetry pole figure able to give visual information about the quasi-symmetries of a raw stiffness tensor determined by any measurement method. Finally we introduce the concept of distance from a raw stiffness tensor to one of the eight symmetry classes available for a stiffness tensor. The...

  11. Effect of geometric size on mechanical properties of dielectric elastomers based on an improved visco-hyperelastic film model

    Science.gov (United States)

    Chang, Mengzhou; Wang, Zhenqing; Tong, Liyong; Liang, Wenyan

    2017-03-01

    Dielectric polymers show complex mechanical behaviors with different boundary conditions, geometry size and pre-stress. A viscoelastic model suitable for inhomogeneous deformation is presented integrating the Kelvin-Voigt model in a new form in this work. For different types of uniaxial tensile test loading along the length direction of sample, single-step-relaxation tests, loading–unloading tests and tensile–creep–relaxation tests the improved model provides a quite favorable comparison with the experiment results. Moreover, The mechanical properties of test sample with several length–width ratios under different boundary conditions are also invested. The influences of the different boundary conditions are calculated with a stress applied on the boundary point and the result show that the fixed boundary will increase the stress compare with homogeneous deformation. In modeling the effect of pre-stress in the shear test, three pre-stressed mode are discussed. The model validation on the general mechanical behavior shows excellent predictive capability.

  12. Equation of Diffusion of a Composite Mixture into a Composite Medium

    Science.gov (United States)

    Kravchuk, A. S.; Kravchuk, A. I.; Popova, T. S.

    2016-07-01

    The equation of diffusion of a composite mixture into a composite medium has been obtained for the first time. The assumption used is that the macropoint of the medium, i.e., an elementary macrovolume, in which the statistical parameters of distribution of inhomogeneities coincide with the corresponding values assigned for the medium as a whole, is small compared to the geometric dimensions of the volume considered. The ″Reuss-Voigt fork″ has been obtained for determining the limits of the change in the diffusion coefficient. Thereafter the fork is narrowed to the ″Kravchuk-Tarasyuk fork.″ Effective diffusion coefficients are obtained as an arithmetic mean value of the Kravchuk-Tarasyuk fork. The found averaged physical parameters can be used in solving specific physical problems for inhomogeneous media.

  13. Modeling of coherent ultrafast magneto-optical experiments: Light-induced molecular mean-field model

    Energy Technology Data Exchange (ETDEWEB)

    Hinschberger, Y. [Instituto de Física dos Materiais da Universidade do Porto, Departamento de Física et Astronomia, Rua do campo Alegre, 687, 4169-007 Porto (Portugal); Hervieux, P.-A. [Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504 BP 43 - F-67034 Strasbourg Cedex 2 (France)

    2015-12-28

    We present calculations which aim to describe coherent ultrafast magneto-optical effects observed in time-resolved pump-probe experiments. Our approach is based on a nonlinear semi-classical Drude-Voigt model and is used to interpret experiments performed on nickel ferromagnetic thin film. Within this framework, a phenomenological light-induced coherent molecular mean-field depending on the polarizations of the pump and probe pulses is proposed whose microscopic origin is related to a spin-orbit coupling involving the electron spins of the material sample and the electric field of the laser pulses. Theoretical predictions are compared to available experimental data. The model successfully reproduces the observed experimental trends and gives meaningful insight into the understanding of magneto-optical rotation behavior in the ultrafast regime. Theoretical predictions for further experimental studies are also proposed.

  14. Dynamic simulation of viscoelastic soft tissues in harmonic motion imaging application.

    Science.gov (United States)

    Shan, Baoxiang; Kogit, Megan L; Pelegri, Assimina A

    2008-10-20

    A finite element model was built to simulate the dynamic behavior of soft tissues subjected to sinusoidal excitation during harmonic motion imaging. In this study, soft tissues and tissue-like phantoms were modeled as isotropic, viscoelastic, and nearly incompressible media. A 3D incompressible mixed u-p element of eight nodes, S1P0, was developed to accurately calculate the stiffness matrix for soft tissues. The finite element equations of motion were solved using the Newmark method. The Voigt description for tissue viscosity was applied to estimate the relative viscous coefficient from the phase shift between the response and excitation in a harmonic case. After validating our model via ANSYS simulation and experiments, a MATLAB finite element program was then employed to explore the effect of excitation location, viscosity, and multiple frequencies on the dynamic displacement at the frequency of interest.

  15. Spin Flips versus Spin Transport in Nonthermal Electrons Excited by Ultrashort Optical Pulses in Transition Metals

    Science.gov (United States)

    Shokeen, V.; Sanchez Piaia, M.; Bigot, J.-Y.; Müller, T.; Elliott, P.; Dewhurst, J. K.; Sharma, S.; Gross, E. K. U.

    2017-09-01

    A joint theoretical and experimental investigation is performed to understand the underlying physics of laser-induced demagnetization in Ni and Co films with varying thicknesses excited by 10 fs optical pulses. Experimentally, the dynamics of spins is studied by determining the time-dependent amplitude of the Voigt vector, retrieved from a full set of magnetic and nonmagnetic quantities performed on both sides of films, with absolute time reference. Theoretically, ab initio calculations are performed using time-dependent density functional theory. Overall, we demonstrate that spin-orbit induced spin flips are the most significant contributors with superdiffusive spin transport, which assumes only that the transport of majority spins without spin flips induced by scattering does not apply in Ni. In Co it plays a significant role during the first ˜20 fs only. Our study highlights the material dependent nature of the demagnetization during the process of thermalization of nonequilibrium spins.

  16. Ab initio study of the structural stability, elastic, electronic and optical properties of NaMgHiFj [(i, j) = (3, 0), (2, 1), (1, 2), (0, 3)] compounds

    Science.gov (United States)

    Chihi, T.; Fatmi, M.; Ghebouli, B.

    2017-08-01

    We studied the structural, elastic, electronic and optical properties of the orthorhombic NaMgH3, NaMgH2F, NaMgHF2 and NaMgF3 compounds. By means of the self-consistent CASTEP code, pseudopotentials, density functional theory in the LDA and GGA approximations, basic physical properties, such as lattice constant, shear modulus, elastic constants (Cij) and optical constants are computed. This study includes elastic parameters of mono and poly-crystalline aggregates. Derived elastic constants, such as bulk, Young's and Shear modulus, Poisson coefficient, Debye temperature and brittle/ductile behavior are estimated with the polycrystalline approach, using Voigt-Reuss-Hill theory. The calculations show that the orthorhombic Pnma structures are mechanically and dynamically stable in the pressure range (0-20 GPa). The calculated density of states shows that the orthorhombic compounds are insulators.

  17. Structural stability, mechanical properties, electronic structures and thermal properties of XS (X = Ti, V, Cr, Mn, Fe, Co, Ni) binary compounds

    Science.gov (United States)

    Liu, Yangzhen; Xing, Jiandong; Fu, Hanguang; Li, Yefei; Sun, Liang; Lv, Zheng

    2017-08-01

    The properties of sulfides are important in the design of new iron-steel materials. In this study, first-principles calculations were used to estimate the structural stability, mechanical properties, electronic structures and thermal properties of XS (X = Ti, V, Cr, Mn, Fe, Co, Ni) binary compounds. The results reveal that these XS binary compounds are thermodynamically stable, because their formation enthalpy is negative. The elastic constants, Cij, and moduli (B, G, E) were investigated using stress-strain and Voigt-Reuss-Hill approximation, respectively. The sulfide anisotropy was discussed from an anisotropic index and three-dimensional surface contours. The electronic structures reveal that the bonding characteristics of the XS compounds are a mixture of metallic and covalent bonds. Using a quasi-harmonic Debye approximation, the heat capacity at constant pressure and constant volume was estimated. NiS possesses the largest CP and CV of the sulfides.

  18. STABILITY ANALYSIS OF VISCOELASTIC CURVED PIPES CONVEYING FLUID

    Institute of Scientific and Technical Information of China (English)

    WANG Zhong-min; ZHANG Zhan-wu; ZHAO Feng-qun

    2005-01-01

    Based on the Hamilton's principle for elastic systems of changing mass, a differential equation of motion for viscoelastic curved pipes conveying fluid was derived using variational method, and the complex characteristic equation for the viscoelastic circular pipe conveying fluid was obtained by normalized power series method. The effects of dimensionless delay time on the variation relationship between dimensionless complex frequency of the clamped-clamped viscoelastic circular pipe conveying fluid with the Kelvin-Voigt model and dimensionless flow velocity were analyzed. For greater dimensionless delay time, the behavior of the viscoelastic pipe is that the first, second and third mode does not couple, while the pipe behaves divergent instability in the first and second order mode, then single-mode flutter takes place in the first order mode.

  19. EPR and DNP Properties of Certain Novel Single Electron Contrast Agents Intended for Oximetric Imaging

    DEFF Research Database (Denmark)

    Ardenkjær-Larsen, J. H.; Laursen, I; Leunbach, I.;

    1998-01-01

    Parameters of relevance to oximetry with Overhauser magnetic resonance imaging (OMRI) have been measured for three single electron contrast agents of the triphenylmethyl type. The single electron contrast agents are stable and water soluble. Magnetic resonance properties of the agents have been...... examined with electron paramagnetic resonance (EPR), nuclear magnetic resonance (NMR), and dynamic nuclear polarization (DNP) at 9.5 mT in water, isotonic saline, plasma, and blood at 23 and 37°C. The relaxivities of the agents are about 0.2–0.4 mM−1s−1and the DNP enhancements extrapolate close...... to the dipolar limit. The agents have a single, narrow EPR line, which is analyzed as a Voigt function. The linewidth is measured as a function of the agent concentration and the oxygen concentration. The concentration broadenings are about 1–3 μT/mM and the Lorentzian linewidths at infinite dilution are less...

  20. Bilinear Expansion For Redistribution Functions

    Science.gov (United States)

    Harutyunian, Haik; Alecian, Georges; Khachatryan, Knarik; Vardanyan, Ani

    2016-11-01

    We suggest here a method for construction of a bilinear expansion for an angle-averaged redistribution function. This function describes the elementary act of a photon scattering by a model two-level atom with the upper level broadened due to radiation damping. An eigenvalue and eigenvector determination problem is formulated and the relevant matrices are found analytically. Numerical procedures for their computations are elaborated as well. A simple method for the numerical calculations accuracy evaluation is suggested. It is shown that a family of redistribution functions describing the light scattering process within the spectral line frequencies can be constructed if the eigenvalue problem for the considered function is solved. It becomes possible if the eigenvalues and eigenvectors with the appropriate basic functions are used. The Voigt function and its derivatives used as basic functions are studied in detail as well.

  1. TRANSVERSAL INERTIAL EFFECT ON RELAXATION/RETARDATION TIME OF CEMENT MORTAR UNDER HARMONIC WAVE

    Institute of Scientific and Technical Information of China (English)

    Jue Zhu; Yonghui Cao; Jiankang Chen

    2008-01-01

    Under dynamic loading, the constitutive relation of the cement mortar will be signif-icantly affected by the transversal inertial effect of specimens with large diameters. In this paper,one-dimensional theoretical analysis is carried out to determine the transversal inertial effect on the relaxation/retardation time of the cement mortar under the harmonic wave. Relaxation time or retardation time is obtained by means of the wave velocity, attenuation coefficient and the frequency of the harmonic wave. Thus, the transversal inertial effect on the relaxation time from Maxwell model, as well as on retardation time from Voigt model is analyzed. The results show that the transversal inertial effect may lead to the increase of the relaxation time, but induce the decrease of the retardation time. Those should be taken into account when eliminating the transversal inertial effect in applications.

  2. Vibration analysis of viscoelastic single-walled carbon nanotubes resting on a viscoelastic foundation

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Da Peng; Lei, Yong Jun; Shen, Zhi Bin [College of Aerospace Science and Engineering, National University of Defense Technology, Changsha (China); Wang, Cheng Yuan [Zienkiewicz Centre for Computational Engineering, College of Engineering, Swansea University, Swansea Wales (United Kingdom)

    2017-01-15

    Vibration responses were investigated for a viscoelastic Single-walled carbon nanotube (visco-SWCNT) resting on a viscoelastic foundation. Based on the nonlocal Euler-Bernoulli beam model, velocity-dependent external damping and Kelvin viscoelastic foundation model, the governing equations were derived. The Transfer function method (TFM) was then used to compute the natural frequencies for general boundary conditions and foundations. In particular, the exact analytical expressions of both complex natural frequencies and critical viscoelastic parameters were obtained for the Kelvin-Voigt visco-SWCNTs with full foundations and certain boundary conditions, and several physically intuitive special cases were discussed. Substantial nonlocal effects, the influence of geometric and physical parameters of the SWCNT and the viscoelastic foundation were observed for the natural frequencies of the supported SWCNTs. The study demonstrates the efficiency and robustness of the developed model for the vibration of the visco-SWCNT-viscoelastic foundation coupling system.

  3. Astrophysical Sources of Statistical Uncertainty in Precision Radial Velocities and Their Approximations

    CERN Document Server

    Beatty, Thomas G

    2015-01-01

    We investigate astrophysical contributions to the statistical uncertainty of precision radial velocity measurements of stellar spectra. We analytically determine the uncertainty in centroiding isolated spectral lines broadened by Gaussian, Lorentzian, Voigt, and rotational profiles, finding that for all cases and assuming weak lines, the uncertainty is the line centroid is $\\sigma_V\\approx C\\,\\Theta^{3/2}/(W I_0^{1/2})$, where $\\Theta$ is the full-width at half-maximum of the line, $W$ is the equivalent width, and $I_0$ is the continuum signal-to-noise ratio, with $C$ a constant of order unity that depends on the specific line profile. We use this result to motivate approximate analytic expressions to the total radial velocity uncertainty for a stellar spectrum with a given photon noise, resolution, wavelength, effective temperature, surface gravity, metallicity, macroturbulence, and stellar rotation. We use these relations to determine the dominant contributions to the statistical uncertainties in precision ...

  4. Creep of parylene-C film

    KAUST Repository

    Lin, Jeffrey Chun-Hui

    2011-06-01

    The glass transition temperature of as-deposited parylene-C is first measured to be 50°C with a ramping-temperature-dependent modulus experiment. The creep behavior of parylene-C film in the primary and secondary creep region is then investigated below and above this glass transition temperature using a dynamic mechanical analysis (DMA) machine Q800 from TA instruments at 8 different temperatures: 10, 25, 40, 60, 80, 100, 120 and 150°C. The Burger\\'s model, which is the combined Maxwell model and Kelvin-Voigt model, fits well with our primary and secondary creep data. Accordingly, the results show that there\\'s little or no creep below the glass transition temperature. Above the glass transition temperature, the primary creep and creep rate increases with the temperature, with a retardation time constant around 6 minutes. © 2011 IEEE.

  5. Magnetized Epsilon-Near-Zero (ENZ) Structures: Hall Opacity, Hall Transparency, and One-Way Photonic Surface States

    CERN Document Server

    Davoyan, Arthur

    2013-01-01

    We study propagation of transverse-magnetic (TM) electromagnetic waves in the bulk and at the surface of magnetized epsilon-near-zero (ENZ) medium in a Voigt configuration. We reveal that in a certain range of material parameters novel regimes of wave propagation emerge: we show that the transparency of the medium can be altered with the magnetization leading either to magnetically induced Hall opacity or Hall transparency of the ENZ. In our theoretical study, we demonstrate that surface waves at the interface between either a transparent or an opaque Hall medium and a homogeneous medium may, under certain conditions, be predominantly one-way. Moreover, we predict that one-way photonic surface states may exist at the interface of an opaque Hall ENZ and a regular metal, giving rise to a possibility for backscattering immune wave propagation and isolation.

  6. Pressure broadening and collisional narrowing in OH(v=1 <-- 0) rovibrational transitions with Ar, He, O2, and N2

    Science.gov (United States)

    Schiffman, A.; Nesbitt, David J.

    1994-02-01

    Line shapes are measured for OH(v=1←0) transitions in the presence of Ar, He, O2, and N2 as a function of N rotational, spin-orbit, and λ doublet states. Pressure broadening coefficients for all transitions and buffer gases are determined from fits of the observed line shapes to the Voigt profile. The dependencies of the observed broadening coefficients on the OH quantum levels are discussed and compared with previous pressure broadening studies in HF and NO. The observed OH line shapes are interpreted in terms of their impact on the determination of mesospheric and stratospheric OH populations, temperatures, and quantum state distributions from OH nightglow and dayglow emission. In the case of OH+Ar, evidence for Dicke narrowing is presented and narrowing coefficients are reported from fits to a ``hard collision'' model.

  7. Structural, elastic and electronic properties of C14-type Al2M (M=Mg, Ca, Sr and Ba) Laves phases

    Science.gov (United States)

    Lishi, Ma; Yonghua, Duan; Runyue, Li

    2017-02-01

    The structural and mechanical properties, Debye temperatures and anisotropic sound velocities of the Laves phases Al2M (M=Mg, Ca, Sr and Ba) with C14-type structure were investigated using the first-principles corresponding calculations. The corresponding calculated structural parameters and formation enthalpies are in good agreement with the available theoretical values, and Al2Ca has the best phase stability. The mechanical properties, including elastic constants, bulk modulus B, shear modulus G, Young's modulus E, and Poisson ratio ν, were deduced within the Voigt-Reuss-Hill approximation. The brittleness and ductility were estimated by the values of Poisson ratio, B/G and Cauchy pressure. Moreover, the elastic anisotropy was investigated by calculating and discussing several anisotropy indexes. Finally, the electronic structures were used to illustrate the bonding characteristics of C14-Al2M (M=Mg, Ca, Sr and Ba) phases.

  8. The elastic constants and anisotropy of superconducting MgCNi3 and CdCNi3 under different pressure

    KAUST Repository

    Feng, Huifang

    2013-11-23

    The second-order elastic constants (SOECs) and third-order elastic constants (TOECs) of MgCNi3 and CdCNi3 are presented by using first-principles methods combined with homogeneous deformation theory. The Voigt-Reuss-Hill (VRH) approximation are used to calculate the bulk modulus B, shear modulus G, averaged Young\\'s modulus E and Poisson\\'s ratio ν for polycrystals and these effective modulus are consistent with the experiments. The SOECs under different pressure of MgCNi3 and CdCNi3 are also obtained based on the TOECs. Furthermore, the Zener anisotropy factor, Chung-Buessem anisotropy index, and the universal anisotropy index are used to describe the anisotropy of MgCNi3 and CdCNi3. The anisotropy of Young\\'s modulus of single-crystal under different pressure is also presented. © 2013 Springer Science+Business Media New York.

  9. Predicting the Coupling Properties of Axially-Textured Materials

    Directory of Open Access Journals (Sweden)

    María E. Fuentes-Montero

    2013-10-01

    Full Text Available A description of methods and computer programs for the prediction of “coupling properties” in axially-textured polycrystals is presented. Starting data are the single-crystal properties, texture and stereography. The validity and proper protocols for applying the Voigt, Reuss and Hill approximations to estimate coupling properties effective values is analyzed. Working algorithms for predicting mentioned averages are given. Bunge’s symmetrized spherical harmonics expansion of orientation distribution functions, inverse pole figures and (single and polycrystals physical properties is applied in all stages of the proposed methodology. The established mathematical route has been systematized in a working computer program. The discussion of piezoelectricity in a representative textured ferro-piezoelectric ceramic illustrates the application of the proposed methodology. Polycrystal coupling properties, predicted by the suggested route, are fairly close to experimentally measured ones.

  10. Optical and magneto-optical properties of metal phthalocyanine and metal porphyrin thin films.

    Science.gov (United States)

    Birnbaum, Tobias; Hahn, Torsten; Martin, Claudia; Kortus, Jens; Fronk, Michael; Lungwitz, Frank; Zahn, Dietrich R T; Salvan, Georgeta

    2014-03-12

    The optical constants together with the magneto-optical Voigt constants of several phthalocyanine (Pc) and methoxy functionalized tetraphenylporphyrin (TMPP) thin films prepared on silicon substrates are presented. The materials investigated are MePc with Me = Fe, Co, Ni, Cu, Zn and MeTMPP with Me = Cu, Ni. We also compared our results to the metal-free H2Pc, H2TPP and H2TMPP. The experimental results will be supported by electronic structure calculations based on density functional theory (DFT) and interpreted using the perimeter model initially proposed by Platt. The model allows for qualitative understanding of the forbidden character of transitions in planar, aromatic molecules, and is able to qualify differences between Pc and TMPP type materials.

  11. Analysis of oscillation processes in a blocky medium by means of continuous models

    Science.gov (United States)

    Sadovskii, V. M.; Chentsov, E. P.

    2016-10-01

    Analysis of oscillation processes in a blocky medium is fulfilled using models, wherein elastic blocks interact via inter-layers with different mechanical properties. To describe wave processes, three different models are applied. First model considers elastic interaction between blocks; second one is the viscoelastic Pointing-Thomson model, that combines both Maxwell and Kelvin-Voigt models, and third one, named as the model with a rigid contact, excludes a possibility of blocks interpenetration. The dissipationless Ivanov scheme is applied in interlayers, while in blocks the Godunov gap decay scheme is used. It is shown that additional enclosing equations, which guarantee absence of energy dissipation in the Ivanov scheme, provide thermodynamic consistency of the model, meaning that the difference analogue of the energy conservation law for blocky structures is performed. Using the MPI technology, a parallel software is designed for simulation of the elastic waves propagation in a two-dimensional blocky medium.

  12. Absorption line profile recovery based on TDLS and MEMS micro-mirror for photoacoustic gas sensing.

    Science.gov (United States)

    Li, Li; Arsad, Norhana; Stewart, George; Thursby, Graham; Uttamchandani, Deepak; Culshaw, Brian; Yi-ding, Wang

    2011-07-01

    A novel and efficient absorption line recovery technique is presented. A micro-electromechanical systems (MEMS) mirror driven by an electrothermal actuator is used to generate laser intensity modulation through the mirror reflection. Tunable diode laser spectroscopy (TDLS) and photoacoustic spectroscopy (PAS) are used to recover the target absorption line profile which is compared with the theoretical Voigt profile. The target gas is 0.01% acetylene (C2H2) in a nitrogen host gas. The laser diode wavelength is swept across the P17 absorption line of acetylene at 1535.4 nm by a current ramp, and an erbium-doped fibre amplifier (EDFA) is used to enhance the optical intensity and increase the signal-to-noise ratio (SNR). A SNR of about 35 is obtained with 100 mW laser power from the EDFA. Good agreement is achieved between the experimental results and the theoretical simulation for the P17 absorption line profile.

  13. Thermal effect on the dynamic response of axially functionally graded beam subjected to a moving harmonic load

    Science.gov (United States)

    Wang, Yuewu; Wu, Dafang

    2016-10-01

    Dynamic response of an axially functionally graded (AFG) beam under thermal environment subjected to a moving harmonic load is investigated within the frameworks of classical beam theory (CBT) and Timoshenko beam theory (TBT). The Lagrange method is employed to derive the equations of thermal buckling for AFG beam, and then with the critical buckling temperature as a parameter the Newmark-β method is adopted to evaluate the dynamic response of AFG beam under thermal environments. Admissible functions denoting transverse displacement are expressed in simple algebraic polynomial forms. Temperature-dependency of material constituent is considered. The rule of mixture (Voigt model) and Mori-Tanaka (MT) scheme are used to evaluate the beam's effective material properties. A ceramic-metal AFG beam with immovable boundary condition is considered as numerical illustration to show the thermal effects on the dynamic behaviors of the beam subjected to a moving harmonic load.

  14. Non-reciprocal directional dichroism in the AFM phase of BiFeO3 at THz frequencies

    Science.gov (United States)

    Nagel, Urmas; Rõõm, T.; Farkas, D.; Szaller, D.; Bordács, S.; Kézsmárki, I.; Engelkamp, H.; Ozaki, Y.; Tomiaki, Y.; Ito, T.; Fishman, Randy S.

    We did THz absorption spectroscopy of BiFeO3 single crystals in the AFM phase, where the spin cycloid is destroyed in magnetic fields between 18 T and 32 T in Voigt geometry at 1.6 K. If B0 ∥ [ 1 1 0 ] , we see strong directional dichroism (DD) of absorption of the magnon mode with light propagating along the direction of the ferroelectric polarization k ∥ P ∥ [ 111 ] and eω ∥ [ 1 1 0 ] , bω ∥ [ 1 1 2 ] . The sign of DD can be reversed (i) by reversing the direction of B0 or (ii) by flipping the sample, thus reversing the propagation direction of light. The observed effect is caused by the strong magneto-electric coupling in the collinear AFM phase. Research sponsored by the Estonian Ministry of Education and Research (IUT23-3).

  15. Structural, elastic and electronic properties of C14-type Al{sub 2}M (M=Mg, Ca, Sr and Ba) Laves phases

    Energy Technology Data Exchange (ETDEWEB)

    Lishi, Ma; Yonghua, Duan, E-mail: duanyh@kmust.edu.cn; Runyue, Li

    2017-02-15

    The structural and mechanical properties, Debye temperatures and anisotropic sound velocities of the Laves phases Al{sub 2}M (M=Mg, Ca, Sr and Ba) with C14-type structure were investigated using the first-principles corresponding calculations. The corresponding calculated structural parameters and formation enthalpies are in good agreement with the available theoretical values, and Al{sub 2}Ca has the best phase stability. The mechanical properties, including elastic constants, bulk modulus B, shear modulus G, Young’s modulus E, and Poisson ratio ν, were deduced within the Voigt-Reuss-Hill approximation. The brittleness and ductility were estimated by the values of Poisson ratio, B/G and Cauchy pressure. Moreover, the elastic anisotropy was investigated by calculating and discussing several anisotropy indexes. Finally, the electronic structures were used to illustrate the bonding characteristics of C14-Al{sub 2}M (M=Mg, Ca, Sr and Ba) phases.

  16. Absorption Line Profile Recovery Based on TDLS and MEMS Micro-Mirror for Photoacoustic Gas Sensing

    Institute of Scientific and Technical Information of China (English)

    LI Li; Norhana Arsad; George Stewart; Graham Thursby; Deepak Uttamchandani; Brian Culshaw; WANG Yi-ding

    2011-01-01

    A novel and efficient absorption line recovery technique is presented. A micro-electromechanical systems (MEMS) mirror driven by an electrothermal actuator is used to generate laser intensity modulation through the mirror reflection. Tunable diode laser spectroscopy (TDLS) and photoacoustic spectroscopy (PAS) are used to recover the target absorption line profile which is compared with the theoretical Voigt profile. The target gas is 0.01% acetylene (C2 H2 ) in a nitrogen host gas. The laser diode wavelength is swept across the P17 absorption line of acetylene at 1 535.4 nm by a current ramp, and an erbium-doped fibre amplifier (EDFA) is used to enhance the optical intensity and increase the signal-to-noise ratio (SNR). A SNR of about 35 is obtained with 100 mW laser power from the EDFA Good agreement is achieved between the experimental results and the theoretical simulation for the P17 absorption line profile.

  17. Polaritons dispersion in a composite ferrite-semiconductor structure near gyrotropic-nihility state

    CERN Document Server

    Tuz, Vladimir R

    2015-01-01

    The dispersion law of both bulk and surface polaritons in a finely-stratified ferrite-semiconductor structure which is under an action of an external static magnetic field in the Voigt geometry is derived and examined in details. In the long-wavelength limit, when the thicknesses of the structure's layers as well as its period are optically thin, with an assistance of the method of effective anisotropic homogeneous medium, the expressions for relative effective constitutive parameters are retrieved in a general tensor form. The gyrotropic-nihility state is defined from the dispersion equation related to the bulk polaritons as a particular extreme condition, at which the longitudinal component of the corresponding constitutive tensor, as well as the corresponding bulk constant simultaneously acquire zero. The extraordinary spectral features of both bulk and surface polaritons near the frequency of the gyrotropic-nihility state are elucidated.

  18. The adhesion and hysteresis effect in friction skin with artificial materials

    Science.gov (United States)

    Subhi, K. A.; Tudor, A.; Hussein, E. K.; Wahad, H. S.

    2017-02-01

    Human skin is a soft biomaterial with a complex anatomical structure and it has a complex material behavior during the mechanical contact with objects and surfaces. The friction adhesion component is defined by means of the theories of Johnson-Kendall-Roberts (JKR), Derjaguin-Muller-Toporov (DMT) and Maugis – Dugdale (MD). We shall consider the human skin entering into contact with a rigid surface. The deformation (hysteresis) component of the skin friction is evaluated with Voigt rheological model for the spherical contact, with the original model, developed in MATHCAD software. The adhesive component of the skin friction is greater than the hysteresis component for all friction parameters (load, velocity, the strength of interface between skin and the artificial material).

  19. Wave propagation in fluid-conveying viscoelastic single-walled carbon nanotubes with surface and nonlocal effects

    Science.gov (United States)

    Zhen, Ya-Xin

    2017-02-01

    In this paper, the transverse wave propagation in fluid-conveying viscoelastic single-walled carbon nanotubes is investigated based on nonlocal elasticity theory with consideration of surface effect. The governing equation is formulated utilizing nonlocal Euler-Bernoulli beam theory and Kelvin-Voigt model. Explicit wave dispersion relation is developed and wave phase velocities and frequencies are obtained. The effect of the fluid flow velocity, structural damping, surface effect, small scale effects and tube diameter on the wave propagation properties are discussed with different wave numbers. The wave frequency increases with the increase of fluid flow velocity, but decreases with the increases of tube diameter and wave number. The effect of surface elasticity and residual surface tension is more significant for small wave number and tube diameter. For larger values of wave number and nonlocal parameters, the real part of frequency ratio raises.

  20. SMEs, Competition and Entry - A developing country perspective

    DEFF Research Database (Denmark)

    Jensen, Camilla

    with a sizeable informal sector in developing countries and corruption. Other leading transition researchers such as Andrei Shleifer offer a variety of views on the informal sector from the romantic to the parasitic. This paper leans on the realist interpretation of de Soto grounded in institutional theory. High...... entry barriers push the entrepreneurs towards the informal sector. Whether entrepreneurs succeed in the transition towards the formal sector depends on the size of the entry barriers which are indirectly regulated both by informal institutions such as corruption and formal institutions...... such as competition policy. The model is tested using the World Bank's BEEPS dataset which is a repeated cross section survey of firms across countries in development and transition. This data gives access to observe among other firm size and whether firms pay a bribe or not. This data is combined with Stephan Voigt...

  1. Low-redshift evolution of the Lyman $\\alpha$ Forest

    CERN Document Server

    Theuns, T; Efstathiou, G P

    1998-01-01

    The low-redshift evolution of the intergalactic medium is investigated using hydrodynamic cosmological simulations. The assumed cosmological model is a critical density cold dark matter universe. The imposed uniform background of ionizing radiation has the amplitude, shape and redshift evolution as computed from the observed quasar luminosity function by Haardt & Madau. We have analysed simulated Lyman-alpha spectra using Voigt-profile fitting, mimicking the procedure with which quasar spectra are analysed. Our simulations reproduce the observed evolution of the number of Lyman-alpha absorption lines over the whole observed interval of z=0.5 to z=4. In particular, our simulations show that the decrease in the rate of evolution of Lyman-alpha absorption lines at z< 2, as observed by Hubble Space Telescope, can be explained by the steep decline in the photo-ionizing background resulting from the rapid decline in quasar numbers at low redshift.

  2. Ab initio-based fracture toughness estimates and transgranular traction-separation modelling of zirconium hydrides

    Science.gov (United States)

    Olsson, P. A. T.; Kese, K.; Kroon, M.; Alvarez Holston, A.-M.

    2015-06-01

    In this work we report the results of an ab initio study of the transgranular fracture toughness and cleavage of brittle zirconium hydrides. We use the Griffith-Irwin relation to assess the fracture toughness using calculated surface energy and estimated isotropic Voigt-Reuss-Hill averages of the elastic constants. The calculated fracture toughness values are found to concur well with experimental data, which implies that fracture is dominated by cleavage failure. To investigate the cleavage energetics, we model the decohesion process. To describe the interplanar interaction we adopt Rose’s universal binding energy relation, which is found to reproduce the behaviour accurately. The modelling shows that the work of fracture and ductility decreases with increasing hydrogen content.

  3. Compressive behavior and energy absorption of metal porous polymer composite with interpenetrating network structure

    Institute of Scientific and Technical Information of China (English)

    LIU Yu; GONG Xiao-lu

    2006-01-01

    Interpenetrating phase composites (IPCs) are a new class of composite materials with improved combinations of mechanical and physical properties. This study was performed on a new type of IPC called metal porous polymer composite (MPPC) with an interpenetrating network structure. Aluminum-polypropylene (Al-PE) and Aluminum-epoxy resin (Al-Ep) composites were produced by infiltrating the polymer in the aluminum foam. The composite microstructures were characterized using SEM observation. The compressive behavior and energy absorption characteristics of MPPC were investigated and compared with the aluminum foams. The compressive modulus of composite was compared with the VOIGT-REUSS bounds and HASHIN-SHTRIKMAN (H-S) bounds models. The experimental modulus of compressive tests falls well within the theoretical models.

  4. Frequency-comb-assisted precision laser spectroscopy of CHF{sub 3} around 8.6 μm

    Energy Technology Data Exchange (ETDEWEB)

    Gambetta, Alessio; Coluccelli, Nicola; Cassinerio, Marco; Fernandez, Toney Teddy; Gatti, Davide; Laporta, Paolo; Galzerano, Gianluca, E-mail: gianluca.galzerano@polimi.it [Dipartimento di Fisica - Politecnico di Milano and Istituto di Fotonica e Nanotecnologie - CNR, Piazza Leonardo da Vinci 32, 20133 Milano (Italy); Castrillo, Antonio; Fasci, Eugenio; Gianfrani, Livio [Dipartimento di Matematica e Fisica - Seconda Università di Napoli, Viale Lincoln 5, 81100 Caserta (Italy); Ceausu-Velcescu, Adina [Laboratoire de Mathématiques et Physique, Université de Perpignan, Via Domitia EA 4217, F-66860 Perpignan (France); Santamaria, Luigi; Di Sarno, Valentina [CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, 80078 Pozzuoli, NA (Italy); Maddaloni, Pasquale [CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, 80078 Pozzuoli, NA (Italy); INFN, Istituto Nazionale di Fisica Nucleare, Sez. Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino, FI (Italy); De Natale, Paolo [INFN, Istituto Nazionale di Fisica Nucleare, Sez. Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino, FI (Italy); CNR-INO, Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze (Italy)

    2015-12-21

    We report a high-precision spectroscopic study of room-temperature trifluoromethane around 8.6 μm, using a CW quantum cascade laser phase-locked to a mid-infrared optical frequency comb. This latter is generated by a nonlinear down-conversion process starting from a dual-branch Er:fiber laser and is stabilized against a GPS-disciplined rubidium clock. By tuning the comb repetition frequency, several transitions falling in the υ{sub 5} vibrational band are recorded with a frequency resolution of 20 kHz. Due to the very dense spectra, a special multiple-line fitting code, involving a Voigt profile, is developed for data analysis. The combination of the adopted experimental approach and survey procedure leads to fractional accuracy levels in the determination of line center frequencies, down to 2 × 10{sup −10}. Line intensity factors, pressure broadening, and shifting parameters are also provided.

  5. Focus: Simon Steen-Andersen

    DEFF Research Database (Denmark)

    2013), the prize for the best orchestral work at the recently held Doneueschinger Musiktage and The Nordic Council Music Prize in 2014. Seismograf/DMT wishes to celebrate the composer Simon Steen-Andersen. We present and reflect on parts of his comprehensive career, in a Danish and an international...... Rasmus Holmboe; a reflection on the importance of the unrepeatable in Steen-Andersen’s music by composer and PhD Rune Søchting, and a contextualisation of central works by Norwegian editor and writer Ida Habbestad. Our Swedish colleague Andreas Engström writes about the new piano concerto (english....... Watch the trailer. The idea for this Focus comes from Jens Voigt-Lund. It has been realised and edited by Sanne Krogh Groth and Rasmus Holmboe, and published with financial support from Carl Nielsen Fonden. English translations by Helen Clara Hemsley. The Focus is also published in a Danish version....

  6. Broadening of CO2 lines in the 4.3 μm region by H2O

    Science.gov (United States)

    Delahaye, T.; Landsheere, X.; Pangui, E.; Huet, F.; Hartmann, J.-M.; Tran, H.

    2016-08-01

    Transmission spectra of CO2 highly diluted in water vapor have been recorded at 50 and 95 °C for four pressures between 0.02 and 0.1 atm using a high resolution Fourier Transform spectrometer. The collisional (Lorentz) widths of many lines of the ν3 band (and of some of the ν3 + ν2 - ν2 hot band) have been retrieved from each spectrum through fits using Voigt line shapes. Our result are about 4% lower than the values recommended in a previous study but they confirm the relative variations of the line broadening on the rotational quantum numbers. We also provide the first determination of H2O-induced line shifts of CO2 lines.

  7. Goos-Hänchen Lateral Displacements at the Interface between Isotropic and Gyroelectric Media

    Directory of Open Access Journals (Sweden)

    Jinbao Wang

    2013-01-01

    Full Text Available A detailed study on Goos-Hänchen (GH lateral displacements of the reflected and transmitted waves propagating at the interface between an isotropic medium and a gyroelectric medium in Voigt configuration is presented. After the reflection coefficient and transmission coefficient are derived, based on the stationary phase approach, GH lateral displacements are obtained analytically. The numerical results for a specific gyroelectric medium are also given. It shows that with the existence of an applied magnetic field, the GH effect occurs not only during total reflection but also during nontotal reflection, which is not true for isotropic media. Moreover, due to the nonreciprocal property of the gyroelectric medium, the sign of the incident angle also influences the displacements. Finite-element method simulations have verified the theoretical results.

  8. A comparison of delayed self-heterodyne interference measurement of laser linewidth using Mach-Zehnder and Michelson interferometers.

    Science.gov (United States)

    Canagasabey, Albert; Michie, Andrew; Canning, John; Holdsworth, John; Fleming, Simon; Wang, Hsiao-Chuan; Aslund, Mattias L

    2011-01-01

    Linewidth measurements of a distributed feedback (DFB) fibre laser are made using delayed self heterodyne interferometry (DHSI) with both Mach-Zehnder and Michelson interferometer configurations. Voigt fitting is used to extract and compare the Lorentzian and Gaussian linewidths and associated sources of noise. The respective measurements are w(L) (MZI) = (1.6 ± 0.2) kHz and w(L) (MI) = (1.4 ± 0.1) kHz. The Michelson with Faraday rotator mirrors gives a slightly narrower linewidth with significantly reduced error. This is explained by the unscrambling of polarisation drift using the Faraday rotator mirrors, confirmed by comparing with non-rotating standard gold coated fibre end mirrors.

  9. Indication of worn WC/C surface locations of a dry-running twin-screw rotor by the oxygen incorporation in tungsten-related Raman modes

    Science.gov (United States)

    Debus, J.; Schindler, J. J.; Waldkirch, P.; Goeke, S.; Brümmer, A.; Biermann, D.; Bayer, M.

    2016-10-01

    By comparing the worn and untouched locations of a tungsten-carbide/carbon surface of a dry-running twin-screw rotor, we demonstrate that tungsten-oxide Raman modes become observable only at worn locations and the integral intensity of the Raman line at 680 cm-1, which is related to the incipient oxidation of the tungsten-carbide stretching mode, is enhanced. Its frequency and width moreover change significantly, thus indicating the mechanical distortion of the bonding that has been occurred during the wearing process. The shape of the tungsten-oxide Raman lines, resembling the Voigt function, hints at a surface morphology that is a characteristic for an amorphous solid environment. Our Raman scattering results may be exploited to characterize the degree of wear of coated surfaces and to identify signatures of a tribological layer.

  10. Development of a high dynamic range spectroscopic system for observation of neutral hydrogen atom density distribution in Large Helical Device core plasma

    Energy Technology Data Exchange (ETDEWEB)

    Fujii, K., E-mail: fujii@me.kyoto-u.ac.jp; Atsumi, S.; Watanabe, S.; Shikama, T.; Hasuo, M. [Department of Mechanical Engineering and Science, Graduate School of Engineering, Kyoto University, Kyoto 606-8540 (Japan); Goto, M.; Morita, S. [National Institute for Fusion Science, Toki 509-5292 (Japan)

    2014-02-15

    We report development of a high dynamic range spectroscopic system comprising a spectrometer with 30% throughput and a camera with a low-noise fast-readout complementary metal-oxide semiconductor sensor. The system achieves a 10{sup 6} dynamic range (∼20 bit resolution) and an instrumental function approximated by a Voigt profile with Gauss and Lorentz widths of 31 and 0.31 pm, respectively, for 656 nm light. The application of the system for line profile observations of the Balmer-α emissions from high temperature plasmas generated in the Large Helical Device is also presented. In the observed line profiles, emissions are detected in far wings more than 1.0 nm away from the line center, equivalent to neutral hydrogen atom kinetic energies above 1 keV. We evaluate atom density distributions in the core plasma by analyzing the line profiles.

  11. Pressure-dependent water absorption cross sections for exoplanets and other atmospheres

    CERN Document Server

    Barton, Emma J; Yurchenko, Sergei N; Tennyson, Jonathan; Dudaryonok, Anna S; Lavrentieva, Nina N

    2016-01-01

    Many atmospheres (cool stars, brown dwarfs, giant planets, extrasolar planets) are predominately composed of molecular hydrogen and helium. H$_2{}^{16}$O is one of the best measured molecules in extrasolar planetary atmospheres to date and a major compound in the atmospheres of brown-dwarfs and oxygen-rich cool stars, yet the scope of experimental and theoretical studies on the pressure broadening of water vapour lines by collision with hydrogen and helium remains limited. Theoretical H$_2$- and He-broadening parameters of water vapour lines (rotational quantum number $J$ up to 50) are obtained for temperatures in the range 300 - 2000 K. Two approaches for calculation of line widths were used: (i) the averaged energy difference method and (ii) the empirical expression for $J$\\p $J$\\pp-dependence. Voigt profiles based on these widths and the BT2 line list are used to generate high resolution ($\\Delta \\tilde{\

  12. Characterization of barium titanate powder doped with sodium and potassium ions by using Rietveld refining; Caracterizacao do po de titanato de bario dopado com ions sodio e potasio com o refinamento de Rietveld

    Energy Technology Data Exchange (ETDEWEB)

    Andrade, M.C.; Assis, J.T.; Pereira, F.R., E-mail: mcalixto@iprj.uerj.b [Universidade do Estado do Rio de Janeiro (IPRJ/UERJ), Nova Friburgo, RJ (Brazil). Instituto Politecnico; Araujo, J.C. [Universidade do Estado do Rio de Janeiro (FFP/UERJ), Sao Goncalo, RJ (Brazil). Fac. de Formacao de Professores; Moreira, E.L.; Moraes, V.C.A.; Lopes, A.R. [Centro Brasileiro de Pesquisas Fisicas (CBPF/MCT), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    A solid-reaction synthesis of doped barium titanate was done by employing barium carbonates, sodium, potassium and titanium oxides with classic procedures. Rietveld refining of X ray diffraction data of perovskite samples with tetragonal symmetry was applying and show good agreement. Besides, the treatment performed from 600 deg C produces nanocrystals of barium titanate with average size of 33 nm. The presence of endothermic peaks related to BaTiO{sub 3} formation at relatively low temperatures was determined by thermal analysis. A pseudo-Voigt Thompson-Cox-Hastings function was used to fit the standard samples of barium titanate. The Rietveld method has showed be efficient to detect the influences of temperature and doping on barium titanate microstructures. (author)

  13. X-ray elastic constants and residual stress of textured titanium nitride coating

    Energy Technology Data Exchange (ETDEWEB)

    Sue, J.A. (Union Carbide Coatings Service Corp., Indianapolis, IN (United States))

    1992-11-16

    X-ray elastic constants for the (422) and (333)/(511) reflections of the [l brace]111[r brace] textured TiN coating were determined. The coating exhibited high elastic anisotropy. The X-ray elastic constant of the (422) reflection was comparable with those predicted from single crystal elastic compliances on the basis of the Voigt and Reuss models, whereas a significant deviation from these models was found for (333)/(511). The residual stress of the coating was determined by X-ray diffraction and bi-metal deflection techniques. The magnitude of residual stress in the coating calculated using the measured X-ray elastic constants was in good agreement with these two reflections and, within experimental scatter, the values were also consistent with those obtained from the deflection measurement.

  14. Determination of foreign broadening coefficients for Methane Lines Targeted by the Tunable Laser Spectrometer (TLS) on the Mars Curiosity Rover

    Science.gov (United States)

    Manne, Jagadeeshwari; Bui, Thinh Q.; Webster, Christopher R.

    2017-04-01

    Molecular line parameters of foreign- broadening by air, carbon dioxide, and helium gas have been experimentally determined for infrared ro-vibrational spectral lines of methane isotopologues (12CH4 and 13CH4) at 3057 cm-1 targeted by the Tunable Laser Spectrometer (TLS) in the Sample Analysis at Mars (SAM) instrument suite on the Mars Science Laboratory (MSL) Curiosity rover. From multi-spectrum analyses with the speed-dependent Voigt line profile with Rosenkrantz line-mixing, speed-dependence and line-mixing effects were quantified for methane spectra at total pressures up to 200 mbar. The fitted air-broadening coefficients deviated from 8-25% to those reported in the HITRAN-2012 database.

  15. The Method of Single Peak Fourier Analysis of Measuring the Size of Mosaic Block and Microstrain by X-ray Diffraction

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The values of mosaic block size and microstrain measured by the method of Voigt function are sometimes largely erroneous and difficult to be revised. In this paper, the causes of the “hook effect” which inevitably exists in the method of Fourier analysis are explained; then the method for resolving this effect is put forward; and finally the method of hypothetical function is used to simplify the method of the Fourier analysis from multi-peak to single-peak. By introducing the parameter m, this method can not only indicate the degree of errors, but also revise them as well. It is simple, clear and able to accomplish the intricate pattern calculation quickly by the aid of computer. In the end, we argue the identity between method of the approximate function and the Fourier analysis, and give a more accurate proportional coefficient k.

  16. Bounds and self-consistent estimates of the elastic constants of polycrystals

    Science.gov (United States)

    Kube, Christopher M.; Arguelles, Andrea P.

    2016-10-01

    The Hashin-Shtrikman bounds on the elastic constants have been previously calculated for polycrystalline materials with crystallites having general elastic symmetry (triclinic crystallite symmetry). However, the calculation of tighter bounds and the self-consistent estimates of these elastic constants has remained unsolved. In this paper, a general theoretical expression for the self-consistent elastic constants is formulated. An iterative method is used to solve the expression for the self-consistent estimates. Each iteration of the solution gives the next tighter set of bounds including the well-known Voigt-Reuss and Hashin-Shtrikman bounds. Thus, all of the bounds on the elastic constants and the self-consistent estimates for any crystallite symmetry are obtained in a single, computationally efficient procedure. The bounds and self-consistent elastic constants are reported for several geophysical materials having crystallites of monoclinic and triclinic symmetries.

  17. CERT TST December 2015 Visit Summary

    Energy Technology Data Exchange (ETDEWEB)

    Little, Robert Currier [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Bailey, Teresa S. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Gamblin, G. Todd [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Olinger, Chad Tracy [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Pautz, Shawn D. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Williams, Alan B. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2016-01-25

    The annual PSAAP II TST visit to Texas A&M’s CERT Center was held on December 1-3, 2015. The agenda for the visit is attached. Non-TAMU attendees were: TST Members – Teresa Bailey (LLNL), Todd Gamblin (LLNL), Bob Little (LANL) – Chair, Chad Olinger (LANL), Shawn Pautz (SNL), Alan Williams (SNL);Other Lab staff – Skip Kahler (LANL), Ana Kupresanin (LLNL), and Rob Lowrie (LANL); AST Members – Nelson Hoffman (LANL) and Bob Voigt (Leidos) The TST wishes to express our appreciation to all involved with CERT for the high-quality posters and presentations and for the attention to logistics that enabled a successful visit. We have broken our comments into four sections: (1) Kudos, (2) Recommendations, (3) Feedback on Priorities for April Review, and (4) Follow-Up Activities with Labs.

  18. Tissue elasticity properties as biomarkers for prostate cancer.

    Science.gov (United States)

    Hoyt, Kenneth; Castaneda, Benjamin; Zhang, Man; Nigwekar, Priya; di Sant'agnese, P Anthony; Joseph, Jean V; Strang, John; Rubens, Deborah J; Parker, Kevin J

    2008-01-01

    In this paper we evaluate tissue elasticity as a longstanding but qualitative biomarker for prostate cancer and sonoelastography as an emerging imaging tool for providing qualitative and quantitative measurements of prostate tissue stiffness. A Kelvin-Voigt Fractional Derivative (KVFD) viscoelastic model was used to characterize mechanical stress relaxation data measured from human prostate tissue samples. Mechanical testing results revealed that the viscosity parameter for cancerous prostate tissue is greater than that derived from normal tissue by a factor of approximately 2.4. It was also determined that a significant difference exists between normal and cancerous prostate tissue stiffness (p cancer detection in prostate and may prove to be an effective adjunct imaging technique for biopsy guidance. Elasticity images obtained with quantitative sonoelastography agree with mechanical testing and histological results. Overall, results indicate tissue elasticity is a promising biomarker for prostate cancer.

  19. La teoría de la relatividad: ayer y hoy

    Directory of Open Access Journals (Sweden)

    Jorge L. Cervantes-Cota

    2006-01-01

    Full Text Available Explicamos los dos postulados dela teoría de la relatividad especial, poniendo énfasis en los conocimientos científicos históricos detrás de las ideas que empleó el joven Albert Einstein en 1905. El papel de científicos como Maxwell, Michelson, Voigt, Lorentz, Fitzgerald, entre otros, es dilucidado. También explicamos la geometría del nuevo espacio-tiempo que emana de la teoría, así como las consecuencias en la medición del espacio, tiempo y masas de observadores en movimiento relativo. Finalmente, se describen algunas de las aplicaciones que ha tenido y tiene una de las teorías más sencillas y probadas de la historia de la ciencia: la relatividad especial.

  20. Boundary element modeling of nondissipative and dissipative waves

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Genmeng [Univ. of Houston, TX (United States). Allied Geophysical Labs.; Zhou, Huawei [Univ. of Houston, TX (United States). Dept. of Geosciences

    1994-01-01

    A boundary element (BE) algorithm is developed to compute acoustic or SH-waves in models consisting of limited or unlimited volumes and irregular interfaces. The authors solve the BE system in the frequency domain so that anelasticity can be easily represented by different viscoelastic models, such as the Kelvin-Voigt type. Three illustrative computations are shown. The waveform given by the BE method for a circular inclusion model agrees well with that given by the finite-difference (FD) method. Dissipation of waves at high frequency caused by the presence of multi-cracks in an elastic medium resembles the masking effect of anelasticity. The waveforms for nondissipative and dissipative models containing hexagonal inclusions illustrate some interesting characteristics of the composite media.

  1. A Comparison of Delayed Self-Heterodyne Interference Measurement of Laser Linewidth Using Mach-Zehnder and Michelson Interferometers

    Directory of Open Access Journals (Sweden)

    Simon Fleming

    2011-09-01

    Full Text Available Linewidth measurements of a distributed feedback (DFB fibre laser are made using delayed self heterodyne interferometry (DHSI with both Mach-Zehnder and Michelson interferometer configurations. Voigt fitting is used to extract and compare the Lorentzian and Gaussian linewidths and associated sources of noise. The respective measurements are wL (MZI = (1.6 ± 0.2 kHz and wL (MI = (1.4 ± 0.1 kHz. The Michelson with Faraday rotator mirrors gives a slightly narrower linewidth with significantly reduced error. This is explained by the unscrambling of polarisation drift using the Faraday rotator mirrors, confirmed by comparing with non-rotating standard gold coated fibre end mirrors.

  2. Extended pump-probe Faraday rotation spectroscopy of the submicrosecond electron spin dynamics in n -type GaAs

    Science.gov (United States)

    Belykh, V. V.; Evers, E.; Yakovlev, D. R.; Fobbe, F.; Greilich, A.; Bayer, M.

    2016-12-01

    We develop an extended pump-probe Faraday rotation technique to study submicrosecond electron spin dynamics with picosecond time resolution in a wide range of magnetic fields. The electron spin dephasing time T2* and the longitudinal spin relaxation time T1, both approaching 250 ns in weak fields, are measured thereby in n -type bulk GaAs. By tailoring the pump pulse train through increasing the contained number of pulses, the buildup of resonant spin amplification is demonstrated for the electron spin polarization. The spin precession amplitude in high magnetic fields applied in the Voigt geometry shows a nonmonotonic dynamics deviating strongly from a monoexponential decay and revealing slow beatings. The beatings indicate a two spin component behavior with a g -factor difference of Δ g ˜4 ×10-4 , much smaller than the Δ g expected for free and donor-bound electrons. This g -factor variation indicates efficient, but incomplete spin exchange averaging.

  3. Advanced magneto-optical microscopy: Imaging from picoseconds to centimeters - imaging spin waves and temperature distributions (invited

    Directory of Open Access Journals (Sweden)

    Necdet Onur Urs

    2016-05-01

    Full Text Available Recent developments in the observation of magnetic domains and domain walls by wide-field optical microscopy based on the magneto-optical Kerr, Faraday, Voigt, and Gradient effect are reviewed. Emphasis is given to the existence of higher order magneto-optical effects for advanced magnetic imaging. Fundamental concepts and advances in methodology are discussed that allow for imaging of magnetic domains on various length and time scales. Time-resolved imaging of electric field induced domain wall rotation is shown. Visualization of magnetization dynamics down to picosecond temporal resolution for the imaging of spin-waves and magneto-optical multi-effect domain imaging techniques for obtaining vectorial information are demonstrated. Beyond conventional domain imaging, the use of a magneto-optical indicator technique for local temperature sensing is shown.

  4. On consistent micromechanical estimation of macroscopic elastic energy, coherence energy and phase transformation strains for SMA materials

    Science.gov (United States)

    Ziółkowski, Andrzej

    2016-09-01

    An apparatus of micromechanics is used to isolate the key ingredients entering macroscopic Gibbs free energy function of a shape memory alloy (SMA) material. A new self-equilibrated eigenstrains influence moduli (SEIM) method is developed for consistent estimation of effective (macroscopic) thermostatic properties of solid materials, which in microscale can be regarded as amalgams of n-phase linear thermoelastic component materials with eigenstrains. The SEIM satisfy the self-consistency conditions, following from elastic reciprocity (Betti) theorem. The method allowed expressing macroscopic coherency energy and elastic complementary energy terms present in the general form of macroscopic Gibbs free energy of SMA materials in the form of semilinear and semiquadratic functions of the phase composition. Consistent SEIM estimates of elastic complementary energy, coherency energy and phase transformation strains corresponding to classical Reuss and Voigt conjectures are explicitly specified. The Voigt explicit relations served as inspiration for working out an original engineering practice-oriented semiexperimental SEIM estimates. They are especially conveniently applicable for an isotropic aggregate (composite) composed of a mixture of n isotropic phases. Using experimental data for NiTi alloy and adopting conjecture that it can be treated as an isotropic aggregate of two isotropic phases, it is shown that the NiTi coherency energy and macroscopic phase strain are practically not influenced by the difference in values of austenite and martensite elastic constants. It is shown that existence of nonzero fluctuating part of phase microeigenstrains field is responsible for building up of so-called stored energy of coherency, which is accumulated in pure martensitic phase after full completion of phase transition. Experimental data for NiTi alloy show that the stored coherency energy cannot be neglected as it considerably influences the characteristic phase transition

  5. Fabrication and mechanical properties of AlCoNiCrFe high-entropy alloy particle reinforced Cu matrix composites

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Jian, E-mail: chenjian@xatu.edu.cn [School of Materials Science and Chemical Engineering, Xi' an Technological University, Xi' an, Shaanxi 710021 (China); Niu, Pengyun; Wei, Ting [School of Materials Science and Chemical Engineering, Xi' an Technological University, Xi' an, Shaanxi 710021 (China); Hao, Liang [College of Architecture and Civil Engineering, Xi' an University of Science and Technology, Xi' an 710054 (China); Liu, Yunzi [School of Materials Science and Chemical Engineering, Xi' an Technological University, Xi' an, Shaanxi 710021 (China); Wang, Xianhui, E-mail: xhwang693@xaut.edu.cn [School of Materials Science and Engineering, Xi' an University of Technology, Xi' an, Shaanxi 710048 (China); Peng, Yuli [School of Materials Science and Chemical Engineering, Xi' an Technological University, Xi' an, Shaanxi 710021 (China)

    2015-11-15

    The AlCoNiCrFe high-entropy alloy was prepared by mechanical alloying and the AlCoNiCrFe high-entropy alloy reinforced Cu matrix composites were subsequently fabricated by powder metallurgy. The phase constituents and morphology of the alloying powders were characterized by X-ray diffractometer and scanning electron microscope, the microstructures of the Cu base composites were characterized by scanning electron microscope and transmission electron microscope, and the compression tests were made as well. The results show that the AlCoNiCrFe high-entropy alloy can form after milling for 24 h. During sintering process, no grain growth occurs and no intermetallic phases present in the AlCoNiCrFe high-entropy alloy in the Cu base composite. Compression tests show that the AlCoNiCrFe high-entropy alloy has a better strengthening effect than metallic glasses and the yield strength of the Cu matrix composite reinforced with the AlCoNiCrFe high-entropy alloy is close to the value predicted by the Voigt model based on the equal strain assumption. - Graphical abstract: AlCoNiCrFe HEA has a better strengthening effect than metallic glasses for particulate reinforced metal matrix composites. The yield strength of the Cu base composite reinforced with the AlCoNiCrFe HEA is close to the upper bound calculated by Voigt model. - Highlights: • AlCoNiCrFe high-entropy alloy was prepared by mechanical alloying. • A novel Cu base composite reinforced with AlCoNiCrFe was fabricated. • No grain growth and no intermetallic phase present in AlCoNiCrFe during sintering. • AlCoNiCrFe has a better strengthening effect than metallic glassy in composites.

  6. On consistent micromechanical estimation of macroscopic elastic energy, coherence energy and phase transformation strains for SMA materials

    Science.gov (United States)

    Ziółkowski, Andrzej

    2017-01-01

    An apparatus of micromechanics is used to isolate the key ingredients entering macroscopic Gibbs free energy function of a shape memory alloy (SMA) material. A new self-equilibrated eigenstrains influence moduli (SEIM) method is developed for consistent estimation of effective (macroscopic) thermostatic properties of solid materials, which in microscale can be regarded as amalgams of n-phase linear thermoelastic component materials with eigenstrains. The SEIM satisfy the self-consistency conditions, following from elastic reciprocity (Betti) theorem. The method allowed expressing macroscopic coherency energy and elastic complementary energy terms present in the general form of macroscopic Gibbs free energy of SMA materials in the form of semilinear and semiquadratic functions of the phase composition. Consistent SEIM estimates of elastic complementary energy, coherency energy and phase transformation strains corresponding to classical Reuss and Voigt conjectures are explicitly specified. The Voigt explicit relations served as inspiration for working out an original engineering practice-oriented semiexperimental SEIM estimates. They are especially conveniently applicable for an isotropic aggregate (composite) composed of a mixture of n isotropic phases. Using experimental data for NiTi alloy and adopting conjecture that it can be treated as an isotropic aggregate of two isotropic phases, it is shown that the NiTi coherency energy and macroscopic phase strain are practically not influenced by the difference in values of austenite and martensite elastic constants. It is shown that existence of nonzero fluctuating part of phase microeigenstrains field is responsible for building up of so-called stored energy of coherency, which is accumulated in pure martensitic phase after full completion of phase transition. Experimental data for NiTi alloy show that the stored coherency energy cannot be neglected as it considerably influences the characteristic phase transition

  7. Escape of Hydrogen from HD209458b

    Science.gov (United States)

    Erwin, Justin; Yelle, Roger; Koskinen, Tommi

    2017-04-01

    Recent modeling of the atmosphere of HD209458b has been used to interpret the Lyman-α line and other observations during transits. Koskinen et al. (2010) used a hydrostatic density profile in the thermosphere combined with the Voigt profile to estimate the Lyman-alpha transit depths for an array of model parameters. A detailed photochemical-dynamical model of the thermosphere was developed by Koskinen et al. (2013a) and used to again estimate model parameters to fit not only the Lyman-alpha transits, but also the transits in the O I, C II and Si III lines (Koskinen et al., 2013b). Recently, Bourrier and Lecavelier (2013) modeled the escape of hydrogen from the extended atmospheres of HD209458b and HD189733b and used the results to interpret Lyman-alpha observations. They included acceleration of hydrogen by radiation pressure and stellar wind protons to simulate the high velocity tails of the velocity distribution, arguing that the observations are explained by high velocity gas in the system while Voigt broadening is negligible. In this work we connect a free molecular flow (FMF) model similar to Bourrier and Lecavelier (2013) to the results of Koskinen et al. (2013b) and properly include absorption by the extended thermosphere in the transit model. In this manner, we can interpret the necessity of the various physical processes in matching the observed line profiles. Furthermore, the transit depths of this model can be used to re-evaluate the atmospheric model parameters to determine if they need to be adjusted due

  8. Quantitative XRD HW-IR plot for clay mineral domain size and lattice strain analyses

    Science.gov (United States)

    Wang, H. J.; Chen, D. Z.; Zhou, J.; Chen, T.; Wang, H.; Zhang, Z. Q.

    2003-04-01

    Based on integral-breadth method, the one of three basic XRD methods (Klug &Alexander, 1974), authors (2000) proposed a qualitative half width (HW)-intensity ratio (IR) plot for clay mineral domain size and lattice strain analyses. In this study, the quantitative HW-IR plot is further developed on the basis of i) the curve relation between the Voigt function and the Pearson VII function; ii) the relationship between the Kübler index and the Weaver index. By numerical simulating, it is derived a curve relation between shape indexes k of the Voigt function and u of the Pearson VII function. With this curve relation, k and u can be converted each other in an accuracy of ten thousandth and therefore the domain size and the lattice strain contributions can be precisely separated from an XRD peak according to Langford's (1978) formula. For micaceous minerals, the HW-IR plot requires only a pair of values of the Kübler index and the Weaver index from 1nm reflection. For other clay minerals, the plot needs a pair of values of the (00l) peak's half width and intensity ratio IR. IR is a ratio of peak maximum to the intensity at the position of maximum minus 0.422oΔ2Θ in CuKα radiation. This quantitative plot renders a mean dimension of clay particles perpendicular to the reflection plane (00l) and an approximate upper limit strain normal to d001. The accuracy for domain size analysis reaches one tenth of nanometre and that for the lattice strain analysis is in ten thousandth respectively. This plot method can be widely used with any digital X-ray diffractometer, whose XRD data can be converted into text format. Excel 5.0 or latter versions in both English and Chinese can well support the HW-IR plot. This study was supported by NNSFC (Grant No 40272022)

  9. Visco-elastic effects on wave dispersion in three-phase acoustic metamaterials

    Science.gov (United States)

    Krushynska, A. O.; Kouznetsova, V. G.; Geers, M. G. D.

    2016-11-01

    This paper studies the wave attenuation performance of dissipative solid acoustic metamaterials (AMMs) with local resonators possessing subwavelength band gaps. The metamaterial is composed of dense rubber-coated inclusions of a circular shape embedded periodically in a matrix medium. Visco-elastic material losses present in a matrix and/or resonator coating are introduced by either the Kelvin-Voigt or generalized Maxwell models. Numerical solutions are obtained in the frequency domain by means of k(ω)-approach combined with the finite element method. Spatially attenuating waves are described by real frequencies ω and complex-valued wave vectors k. Complete 3D band structure diagrams including complex-valued pass bands are evaluated for the undamped linear elastic and several visco-elastic AMM cases. The changes in the band diagrams due to the visco-elasticity are discussed in detail; the comparison between the two visco-elastic models representing artificial (Kelvin-Voigt model) and experimentally characterized (generalized Maxwell model) damping is performed. The interpretation of the results is facilitated by using attenuation and transmission spectra. Two mechanisms of the energy absorption, i.e. due to the resonance of the inclusions and dissipative effects in the materials, are discussed separately. It is found that the visco-elastic damping of the matrix material decreases the attenuation performance of AMMs within band gaps; however, if the matrix material is slightly damped, it can be modeled as linear elastic without the loss of accuracy given the resonator coating is dissipative. This study also demonstrates that visco-elastic losses properly introduced in the resonator coating improve the attenuation bandwidth of AMMs although the attenuation on the resonance peaks is reduced.

  10. Bergson and Derrida: A Question of Writing Time as Philosophy’s Other

    Directory of Open Access Journals (Sweden)

    Daniel Alipaz

    2011-08-01

    Full Text Available Following the 1988 publication of Bergsonism by Gilles Deleuze, many contemporary critics such as Leonard Lawlor and Paul Douglass have re-contextualized Bergson within poststructuralism. In so doing, Bergsonian theory enables us to readdress questions associated with concepts of temporality and their relation to language. In considering this re-appropriation, Suzanne Guerlac in Thinking in Time: an introduction to Henri Bergson (2006, asks why Bergson has never been considered in relation to Derrida, given that the two philosophers share fundamental concerns about time and writing. Following Derrida’s critique of Husserl in La Voix et le phénomène (1967, it is perhaps the case that many critics categorize Bergson as a phenomenologist. However, I aim to develop the argument that Guerlac instigates and show that Derrida’s critique of Husserl in fact establishes a close proximity with Bergson’s view that Western metaphysics suppresses time as durée. I will show how both Bergson and Derrida operate with the understanding of a particular rupture in the full presence of the present, an expansion of consciousness as a ‘now’ to include a constant deferral to memory. While this overlap establishes an affinity, I conclude by showing that it simultaneously marks a point of diffraction with regard to how both seek to methodologically embody such a concept of time.

  11. Gala Concert for the 50th Anniversary of CERN

    CERN Document Server

    2004-01-01

    The CERN 50th Anniversary celebrations will wrap up with music on 18 December with a Gala Concert by the Philharmonic Orchestra of London in Victoria Hall, Geneva. The orchestra will be directed by Tommaso Placidi, a young talented conductor, and will also enjoy the presence of Maxim Vengerov as first violin. This evening is organised by Mrs Suzanne Hurter, with the support of private companies as well as of the city and the canton of Geneva. The concert will begin with the Overture of Wagner's Flying Dutchman. Maxim Vengerov will then interpret Beethoven's Concert for violin and orchestra. The second part of the concert will be devoted to Tschaikovsky's Fourth Symphony. Tickets cost between 35CHF and 140 CHF according to the seat. People working at CERN will have a 10% discount. You may buy your tickets at the Kiosque FK inside the building Pfister Meubles in Meyrin (ch de Rianbosson 5-9) and get your discount by showing your CERN card. Find out more about the seats available, go to the Resaplus Ticket Book...

  12. Reviews of recent publications

    Directory of Open Access Journals (Sweden)

    2009-01-01

    Full Text Available Bigsby, Christopher. Remembering and Imagining the Holocaust: The Chain of Memory by Roxane Riegler Bruce, Iris. Kafka and Cultural Zionism. Dates in Palestine by Bettina Matthias Haase, Christine. When Heimat Meets Hollywood: German Filmmakers and America, 1985-2005 by Maria Stehle Herzog, Dagmar. Sex after Fascism: Memory and Morality in Twentieth-Century Germany by Sabine Hake Iossel, Mikhail and Jeff Parker. Amerika. Russian Writers View the United States by Yuliya Minkova Macksey, Richard and Eugenio Donato, eds. The Structuralist Controversy: The Languages of Criticism and the Sciences of Man by Safoi Babana-Hampton Magnarelli, Sharon. Home is Where the (Heart Is: The Family Romance in Late Twentieth-Century Mexican and Argentine Theater by Margo Milleret Matthias, Bettina. The Hotel as Setting in Early Twentieth-Century German and Austrian Literature: Checking in to Tell a Story by Susanne Kelley McGlothlin, Erin. Second-Generation Holocaust Literature: Legacies of Survival and Perpetration by Jennifer Cameron Taberner, Stuart, ed. Contemporary German Fiction: Writing in the Berlin Republic by Alexandra Merley Hill Walter Frisch. German Modernism: Music and the Arts by Jill Suzanne Smith

  13. Impact of olmesartan on blood pressure, endothelial function, and cardiovascular outcomes

    Directory of Open Access Journals (Sweden)

    Eduardo Pimenta

    2010-09-01

    Full Text Available Eduardo Pimenta1, Suzanne Oparil21Endocrine Hypertension Research Centre and Clinical Centre of Research Excellence in Cardiovascular Disease and Metabolic Disorders, University of Queensland School of Medicine, Princess Alexandra Hospital, Brisbane, Queensland, Australia; 2Vascular Biology and Hypertension Program, University of Alabama at Birmingham, Birmingham, AL, USAAbstract: The vascular endothelium, the largest “organ” in the body, synthesizes and releases a wide spectrum of vasoactive substances into the circulation. Endothelial dysfunction links hypertension and other cardiovascular (CV risk factors that promote the development of atherosclerotic plaque, CV disease, and fatal and nonfatal CV events. Blood pressure (BP reduction is the most effective way to reduce CV risk in patients with hypertension, but it is unknown whether endothelial dysfunction is a cause or consequence of hypertension. Renin–angiotensin–aldosterone system blockers improve endothelial function and have favorable vascular, metabolic, cardiac, and renoprotective effects that are independent of BP reduction. Olmesartan effectively reduces BP and also has vasoprotective properties, including reductions in endothelial dysfunction and inflammation, prevention of microalbuminuria, and reversal of vascular remodeling. Large-scale, long-term studies are needed to confirm that olmesartan has vasoprotective effects that are independent of BP control and to determine whether these pleiotropic effects translate into improved CV disease outcomes.Keywords: hypertension, endothelial function, cardiovascular outcomes, olmesartan

  14. Fixed combinations in the management of hypertension: patient perspectives and rationale for development and utility of the olmesartan – amlodipine combination

    Directory of Open Access Journals (Sweden)

    Eduardo Pimenta

    2008-06-01

    Full Text Available Eduardo Pimenta1, Suzanne Oparil21Department of Hypertension and Nephrology, Dante Pazzanese Institute of Cardiology, Sao Paulo, SP, Brazil; 2Vascular Biology and Hypertension Program, University of Alabama at Birmingham, Birmingham, AL, USAbstract: Although the awareness and control of hypertension has increased, only 37% of hypertensive patients in the US achieve the conservative goal of <140/90 mmHg. Achieving optimal blood pressure (BP control is the most important single issue in the management of hypertension, and in most hypertensive patients, it is difficult or impossible to control BP with one drug. Blocking two or more BP regulatory systems provides a more effective and more physiologic reduction in BP, and current guidelines have recommended the use of combination therapy as first-line treatment, or early in the management of hypertension. Fixed combination therapy is an efficacious, relatively safe, and may be cost-effective method of decreasing BP in most patients with essential hypertension. Similar to other combinations, fixed-dose combination tablets containing the dihydropyridine calcium channel blocker amlodipine and the angiotensin II receptor blocker olmesartan bring together two distinct and complementary mechanisms of action, resulting in improved BP control and potential for improved target organ protection relative to either class of agent alone.Keywords: olmesartan – amlodipine, hyptertension, combination therapy

  15. Ted Wilson passes on the torch

    CERN Document Server

    2003-01-01

    As part of the Laboratory's outreach programme, the CERN Accelerator School (CAS) brings together students and experienced physicists from all over the world with the aim of promoting the understanding of accelerator physics. As head of the School for 11 years, Ted Wilson became a CERN ambassador to the outside community. He retired in March, handing over the reigns of the CAS to Daniel Brandt. Ted Wilson and his assistant, Suzanne von Wartburg, during an EPAC meeting in 1994.The accelerator schools allowed some time for relaxation in the local surrounding for students as well as for the director of CAS.As a boy, Ted Wilson could have embarked on a career in pop music rather than physics, rubbing shoulders at secondary school in Liverpool with two of the future Beatles. But prefering classical music and answering the call of science, he took the more serious of the two paths, studying physics first at Oxford University then at the Rutherford Laboratory. After a year at CERN and four years at the Rutherford La...

  16. Integrated research training program of excellence in radiochemistry

    Energy Technology Data Exchange (ETDEWEB)

    Lapi, Suzanne [Washington Univ., St. Louis, MO (United States)

    2015-09-18

    The overall goal of this “Integrated Research Training Program of Excellence in Radiochemistry” is to provide a rich and deep research experience in state-of-the-art radiochemistry and in the fundamentals of radioisotopic labeling and tracer methodology to develop researchers who are capable of meeting the challenges of designing and preparing radiotracers of broad applicability for monitoring and imaging diverse biological systems and environmental processes. This program was based in the Departments of Radiology and Radiation Oncology at Washington University Medical School and the Department of Chemistry at the University of Illinois at Urbana Champaign, and it was initially directed by Professor Michael J. Welch as Principal Investigator. After his passing in 2012, the program was led by Professor Suzanne E. Lapi. Programmatic content and participant progress was overseen by an Internal Advisory Committee of senior investigators consisting of the PIs, Professor Mach from the Department of Radiology at Washington University and Professor John A. Katzenellenbogen of the Department of Chemistry at the University of Illinois. A small External Advisory Committee to give overall program guidance was also constituted of experts in radiolabeled compounds and in their applications in environmental and plant science.

  17. Role of aliskiren in cardio-renal protection and use in hypertensives with multiple risk factors

    Directory of Open Access Journals (Sweden)

    Eduardo Pimenta

    2009-05-01

    Full Text Available Eduardo Pimenta1, Suzanne Oparil21Endocrine Hypertension Research Center and Clinical Center of Research Excellence in Cardiovascular Disease and Metabolic Disorders, University of Queensland School of Medicine, Princess Alexandra Hospital, Brisbane, QLD, Australia; 2Vascular Biology and Hypertension Program, University of Alabama at Birmingham, Birmingham, AL, USAbstract: The renin-angiotensin-aldosterone system (RAAS is an important mediator of blood pressure (BP and volume regulation in both normotensive and hypertensive persons and is a major contributor to hypertension-related target organ damage. The concept of renin inhibition for managing hypertension by blocking the RAAS pathway at its point of activation is very attractive since the renin-angiotensinogen reaction is the first and rate-limiting step in the generation of angiotensin II (Ang II. Aliskiren, the first in a new class of orally effective direct renin inhibitors (DRIs, is approved for the treatment of hypertension. It is effective in reducing BP in the general population of hypertensive patients and in special patient groups such as obese persons, and has a tolerability and safety profile similar to placebo. Aliskiren has renoprotective, cardioprotective and anti-atherosclerotic effects in animal models that appear to be independent of BP lowering. It reduces proteinuria in diabetic patients and has favorable neurohumoral effects in patients with symptomatic heart failure. Additional outcome trials are needed to establish the role of this novel class of antihypertensive medication in the therapeutic armamentarium.Keywords: hypertension, renin inhibitors, renin-angiotensin-aldosterone system

  18. COMUNICAÇÃO E EDUCAÇÃO NA LITERATURA DISTÓPICA: de Nós (1924 a Jogos vorazes (2008

    Directory of Open Access Journals (Sweden)

    Ana Laura Neumann

    2013-07-01

    Full Text Available O texto analisa, inicialmente, as representações em comunicação e educação nos textos distópicos Nós (1924, de Evgueny Zamiatin, Admirável Mundo Novo (1932, de Aldous Huxley, 1984 (1949, de George Orwell, Revolução no Futuro (1952, de Kurt Vonnegut Jr. e Fahrenheit 451 (1953, de Ray de Bradbury. Juntamente com as análises são apresentadas as características básicas da distopia. Como forma de atualizar a discussão sobre a temática, é acrescentada a análise de Jogos Vorazes (2008, de Suzanne Collins. Com esse conjunto de textos é possível apresentar um painel que revela a força da literatura distópica como forma de reflexão crítica sobre a sociedade em diferentes momentos da história.

  19. Improving adherence with inhaler therapy in COPD

    Directory of Open Access Journals (Sweden)

    Suzanne C Lareau

    2010-11-01

    Full Text Available Suzanne C Lareau1, Barbara P Yawn21College of Nursing, University of Colorado Denver, Aurora, Colorado; 2Department of Research, Olmsted Medical Center, Rochester, Minnesota, USAAbstract: Chronic obstructive pulmonary disease (COPD is a major public health problem, associated with considerable morbidity and health care costs. The global burden of COPD morbidity is predicted to rise substantially in the coming decade, but could be moderated by better use of existing management strategies. Smoking cessation, medication therapy, and pulmonary rehabilitation have all been shown to diminish morbidity and improve patient outcomes. But each of these strategies requires adherence. Adherence is crucial for optimizing clinical outcomes in COPD, with nonadherence resulting in a significant health and economic burden. Suboptimal medication adherence is common among COPD patients, due to a number of factors that involve the medication, the delivery device, the patient, and the health professionals caring for the patient. Lack of medication adherence needs to be identified and addressed by using simplified treatment regimens, increasing patient knowledge about self-management, and enhancing provider skills in patient education, communication, and adherence counseling. This article reports some of the challenges of medication nonadherence faced by the clinician in the management of COPD, and suggests ways to evaluate and improve adherence effectively in primary care.Keywords: chronic obstructive pulmonary disease, adherence, clinician

  20. Staff members with 25 years' service at CERN in 2005

    CERN Multimedia

    2005-01-01

    The 74 staff members who have spent 25 years at CERN in 2005 were invited by the Director-General to a reception in their honour on 22 November. ADRIAN Gilbert / AB ALLIOD Marie-Noëlle / AB ANTOINET Gérard / SC AUBERT Marc / TS AUQUIER Christian / SC BAIRD Simon / AB BARRAS Suzanne / PH BAUD Richard / AT BELLONI Jean / SC BERTUOL Gilbert / SC BLANC Jean-Luc / AB BONVALLET Guy / SC BOSSUS Patrice / SC BROERE Johannes / AB BRU Yvon / TS BURDAIRON Alain / TS CANARD Philippe / AT CAVALLO Patrice / SC CHARRA Patrick / PH CHATAIGNEAU Marc / SC COLIN Gilles / SC DAHLEN Pierre / AB DE GROOT Johannes / PH DEDOBBELER Bernard / TS DELCAMBRE Jean Pierre / SC DELENCLOS Yves / TS DEROYER Patrick / SC DESBISSONS Christian / SC DRAPER Mick / AB DROUX Pascal / FI DUCASTEL Claude / TS DUMUR Alain / SC FOCKER Gerrit / AB FOFFANO Giuseppe / TS FORRAT Isabelle / IT FREI Marie-José / DSU FRESSARD Michel / TS GAGNIERE Daniel / TS GIUDICI Pierre-Ange / PH GOICOECHEA Bernard / TS GUEHO Alain / TS GUENEHEC François / SC JE...

  1. Tchad Blake使用ICON赢取格莱美大奖

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    “没有ICON我无法取得这个成绩,我喜欢这种工作方式”。Tchad Blake凭借对Suzanne Vega《Beauty and Crime》的混音,赢得非古典类最佳音频工程唱片大奖。这是Tchad Blake用Digidesign的16路ICON D—ControlTM完成的第一个重要唱片。Tchad Blake有丰富的模拟设备使用经验,但遇到ICOND—Control之后,他决定转变为数字混音方式。他说:“我喜欢用数字的方式进行编辑,但我还扔不掉触摸真实旋钮的感觉,感谢ICON,让我可以用最喜欢的方式来操作ProTools。”

  2. TeleWound care – providing remote wound assessment and treatment in the home care setting: current status and future directions

    Directory of Open Access Journals (Sweden)

    Santamaria N

    2013-11-01

    Full Text Available Nick Santamaria,1 Suzanne Kapp2 1University of Melbourne and Melbourne Health, Royal Melbourne Hospital, Melbourne, VIC, Australia; 2Royal District Nursing Service Institute, Melbourne, VIC, Australia Abstract: The use of wound telemedicine systems in the home care environment has been expanding for the last decade. These systems can generally be grouped into two main types: store and forward systems and video conference type systems; additionally, there are also hybrid systems available that include elements of both. Evidence to date suggests that these systems provide significant benefits to patients, clinicians, and to the health care system generally. Reductions in resource use, visit substitution, costs, and high patient and clinician satisfaction have been reported; however, there is a lack of integration with existing health care technology and no clearly defined technical or clinical standards as yet. Similarly, the legalities associated with wound telemedicine and remote consultation remain unclear. As wound telemedicine systems continue to evolve and be deployed in different locations, there remains significant potential to harness their power to benefit patients being treated at home. Keywords: telemedicine, home care, e-health

  3. Subcutaneous immunoglobulin replacement therapy in the treatment of patients with primary immunodeficiency disease

    Directory of Open Access Journals (Sweden)

    Suzanne Skoda-Smith

    2009-12-01

    Full Text Available Suzanne Skoda-Smith, Troy R Torgerson, Hans D OchsSeattle Children’s Research Institute and Department of Pediatrics, University of Washington, Seattle, WashingtonAbstract: Antibody deficiency is the most frequently encountered primary immunodeficiency disease (PIDD and patients who lack the ability to make functional immunoglobulin require life-long replacement therapy to prevent serious bacterial infections. Human serum immunoglobulin manufactured from pools of donated plasma can be administered intramuscularly, intravenously or subcutaneously. With the advent of well-tolerated preparations of intravenous immunoglobulin (IVIg in the 1980s, the suboptimal painful intramuscular route of administration is no longer used. However, some patients continued to experience unacceptable adverse reactions to the intravenous preparations, and for others, vascular access remained problematic. Subcutaneously administered immunoglobulin (SCIg provided an alternative delivery method to patients experiencing difficulties with IVIg. By 2006, immunoglobulin preparations designed exclusively for subcutaneous administration became available. They are therapeutically equivalent to intravenous preparations and offer patients the additional flexibility for the self-administration of their product at home. SCIg as replacement therapy for patients with primary antibody deficiencies is a safe and efficacious method to prevent serious bacterial infections, while maximizing patient satisfaction and improving quality of life.Keywords: subcutaneous immunoglobulin, primary immunodeficiency disease, antibody deficiency, X-linked agammaglobulinemia, common variable immune deficiency

  4. Introduction

    Directory of Open Access Journals (Sweden)

    Peter Kravanja

    2009-10-01

    Full Text Available Démarrant sur l'idée répandue selon laquelle "Chris Marker, c'est un peu le plus célèbre des cinéastes
    inconnus", je me suis posé la question de savoir qui, de sa popularité ou de sa discrétion, l'emporterait... Or,
    force m'a été de constater avec joie, ces dernières années, lors de chaque parution d'un ouvrage universitaire
    ou de chaque exposition photographique ou multimédia, que l'oeuvre signé Chris Marker, à la fois multiple et
    unifié, devient de plus en plus connu, voire reconnu, par un public toujours plus large. En outre, de
    nombreux chercheurs ont répondu à l'appel de la présente revue pour ce numéro spécial qui lui est dédié, à
    tel point qu'il paraîtra en deux parties. J'ai donc le plaisir de présenter aux lecteurs, dans un premier temps,
    les contributions (par ordre alphabétique de David Foster, de Thibaut Garcia, de Nicolas Geneix, de Barbara
    Laborde, de Suzanne Liandrat-Guigues et de Luc Vancheri.

  5. Risk factors for the development of depression in patients with hepatitis C taking interferon-α

    Directory of Open Access Journals (Sweden)

    Smith KJ

    2011-05-01

    Full Text Available Kimberley J Smith¹, Suzanne Norris², Cliona O'Farrelly³, O'Mara SM¹¹Trinity College Institute of Neuroscience, ²Hepatology Centre, St James's Hospital, Dublin, Ireland; ³Department of Biochemistry and Immunology, Trinity College Dublin, Dublin, IrelandAbstract: Interferon-α, currently used for the treatment of hepatitis C, is associated with a substantially elevated risk of depression. However, not everyone who takes this drug becomes depressed, so it is important to understand what particular factors may make some individuals more 'at risk' of developing depression than others. Currently there is no consensus as to why interferon-induced depression occurs and the range of putative risk factors is wide and diverse. The identification of risk factors prior to treatment may allow identification of patients who will become depressed on interferon, allowing the possibility of improved treatment support and rates of treatment adherence. Here, we consolidate and review the literature on risk factors, and we discuss the potential confounds within the research examined in order to better isolate the risk factors that may be important in the development of depression in these patients and which might help predict patients likely to become depressed on treatment. We suggest that interactions between psychobehavioral, genetic, and biological risk factors are of particular importance in the occurrence of depression in patients with hepatitis C taking interferon-α.Keywords: interferon-α, risk factors, depression, hepatitis C

  6. Adivinhas de Rimbaud

    Directory of Open Access Journals (Sweden)

    Mônica Genelhu Fagundes

    2016-01-01

    Full Text Available Este artigo propõe uma leitura dos poemas em prosa de Arthur Rimbaud como recriações do gênero tradicional da adivinha. Votado à abertura e ao deslocamento, ele se revela ideal para a expressão de uma poética que renega a instância do real como totalidade dada e logicamente resolvida, concebendo-a como espaço de liberdade, de mistério, de enigma e, finalmente, de criação. A investigação sobre o poema em prosa como forma (bem como sobre o poema em prosa rimbaudiano em suas especificidades retoma o estudo consagrado de Suzanne Bernard e se desenvolve em clave interdisciplinar, amparando-se na reflexão sobre a imagem empreendida por Georges Didi-Huberman no campo da Teoria da Arte e nos apontamentos de Johan Huizinga sobre o jogo.

  7. Roger Bailey takes over as head of CAS

    CERN Multimedia

    Katarina Anthony

    2011-01-01

    Established at the beginning of 1983, the CERN Accelerator School has developed to include two courses per year offered to hundreds of students from all over the world. Following the successful management of Daniel Brandt, Roger Bailey joins the newly formed Office of the Director of Accelerators and Technology (DAT) and becomes the new Head of the CERN Accelerator School (CAS).   Roger Bailey, the new Head of the CERN Accelerator School.  After 8 years of successful growth in popularity for the School, Daniel Brandt has handed on the baton to Roger Bailey. “The success of the CERN Accelerator School has been the result of a fantastic team effort,” says Brandt. “Along with my assistant - initially Suzanne von Wartburg and then Barbara Strasser - I had help from an advisory committee to decide both on the specialist topic and the venue for each workshop, and dedicated programme committees to help find the expert lecturers for the courses. Their support has ...

  8. Community pharmacy-based asthma services: current perspectives and future directions

    Directory of Open Access Journals (Sweden)

    Bollmeier SG

    2014-08-01

    Full Text Available Suzanne G Bollmeier, Theresa R ProsserSt Louis College of Pharmacy, St Louis, MO, USAAbstract: Achieving and maintaining asthma control and improving patients’ quality of life are cornerstones of asthma management. This review summarizes the current literature related to services provided by community pharmacists to patients with asthma. Comprehensive asthma programs provided by community pharmacists have improved patients’ knowledge of the disease, device technique skills, patient adherence, and quality of life. One study shows such comprehensive programs are cost effective in patients with severe or uncontrolled asthma, which cannot be extrapolated to all programs. Targeted interventions by pharmacists could be provided to a larger population of patients. Pharmacists have identified that lack of time, resources, and training are barriers to implementing asthma programs. In addition, optimal models are needed to integrate interventions into the dispensing workflow. Optimal training programs should include skills in problem solving, device technique, and counseling. A movement towards “institutionalizing” routine asthma interventions or patient encounters is necessary if consistent services are to be given to all patients, and appropriate compensation is provided for pharmacist services.Keywords: community, pharmacy, pharmacist, asthma, education

  9. Role of aliskiren in cardio-renal protection and use in hypertensives with multiple risk factors

    Directory of Open Access Journals (Sweden)

    Eduardo Pimenta

    2009-06-01

    Full Text Available Eduardo Pimenta1, Suzanne Oparil21Endocrine Hypertension Research Centre and Clinical Centre of Research Excellence in Cardiovascular Disease and Metabolic Disorders, University of Queensland School of Medicine, Greenslopes Princess Alexandra Hospitals, Brisbane, QLD, Australia; 2Vascular Biology and Hypertension Program, University of Alabama at Birmingham, Birmingham, AL, USAAbstract: The renin–angiotensin–aldosterone system (RAAS is a key mediator of blood pressure (BP and volume regulation in both normotensive and hypertensive persons. Stimulation of RAAS also contributes to hypertension-related target organ damage. The renin–angiotensinogen reaction is the first and rate-limiting step in the generation of angiotensin II (Ang II and has been a target of antihypertensive drug development for decades. Aliskiren is the first in a new class of orally effective direct renin inhibitors (DRIs and is approved for the treatment of hypertension in humans. It effectively reduces BP in the general population of hypertensive patients and has a tolerability and safety profile similar to placebo. Aliskiren has favorable effects on vascular inflammation and remodeling, on neurohumoral mediators of various forms of cardiovascular disease, including heart failure, and on proteinuria in diabetic patients. Additional outcome trials are needed to establish the role of this novel class of antihypertensive medication in preventing cardiovascular disease morbidity and mortality.Keywords: hypertension, renin inhibitors, renin-angiotensin-aldosterone system

  10. Making the deal real: how GE Capital integrates acquisitions.

    Science.gov (United States)

    Ashkenas, R N; DeMonaco, L J; Francis, S C

    1998-01-01

    Most companies view acquisitions and mergers as onetime events managed with heroic effort--anxiety-producing experiences that often result in lost jobs, restructured responsibilities, derailed careers, and diminished power. Little wonder, then, that most managers think about how to get them over with--not how to do them better. But even as the number of mergers and acquisitions rises in the United States, studies show the performance of the resulting companies falls below industry averages more often than not. To improve these statistics, executives need to view acquisition integration as a manageable process, not a unique event. One company that has done exactly that is GE Capital Services, which has assimilated more than 100 acquisitions in the past five years alone and, in the process, has developed a formal model for melding new acquisitions into the corporate fold. Drawing on their experiences working with the company to develop the model, consultants Ron Ashkenas and Suzanne Francis, together with GE Capital's Lawrence DeMonaco, offer four lessons from the company's successful run. First, begin the integration process before the deal is signed. Second, dedicate a full-time individual to managing the integration process. Third, implement any necessary restructuring sooner rather than later. And fourth, integrate not only the business operations but also the corporate cultures. These guidelines won't erase all of the discomfort that accompanies many mergers, but they can make the process more transparent and predictable for those involved.

  11. 医患沟通过程技巧——Calgary-Cambridge指南

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    @@ Suzanne M Kurtz博士是加拿大Calgary(卡尔加里)大学教育与医学系的沟通学教授,主要致力于研究改进医疗卫生和教育领域沟通和教学实践,发展沟通课程和临床技能评估.Jonathan Silverman博士是剑桥大学临床医学系临床副主任、临床学院沟通研究主任,同时也是剑桥郡Linton的全科医师.自1988年起他就积极地从事沟通技巧教学,1999年他成为剑桥大学本科沟通课程沟通研究主任.他还是医学访谈教学协会的联合主席.1996年,Kurtz与Silverman联合完成了Calgary-Cambridge指南,试图以具体,简明的方式回答医患沟通中的技巧问题.

  12. “In hunger for bread, not in thirst for revenge”: Belly, bellum and rebellion in Coriolanus and The Hunger Games trilogy

    Directory of Open Access Journals (Sweden)

    Sara Soncini

    2015-05-01

    Full Text Available A play saturated with images of food, eating and being eaten, Coriolanus provides the most thoroughgoing exploration of the hunger paradigm within the Shakespearean corpus. From the very early moments of the tragedy, Shakespeare’s emphasis on hunger as a literal, material condition is paralleled by a probing investigation of the rhetorical and metaphorical dimension of alimentary imagery and its problematic applicability, and actual application, in the political sphere – most notably, in Menenius Agrippa’s fable of the belly, a rhetorical attempt at naturalizing social inequality which however fails to appease the plebeians’ threatened uprising against the Roman aristocracy.Shakespeare’s politicization of hunger has played a crucial role in securing and shaping Coriolanus’s afterlife. This essay deals with a very recent take on Coriolanus by investigating the Shakespearean palimpsest within Suzanne Collins’s highly popular The Hunger Games trilogy (2008-2010. While unacknowledged by the author and so far unregistered in critical studies of the novels, Collins’s extensive borrowing from Coriolanus across the three instalments of her science fiction adventure amounts to a consistent and comprehensive reframing of Shakespeare’s hunger paradigm, here remoulded into cautionary dystopia about the social and political order of the global era.

  13. Encuentros artísticos con el dolor, las memorias y las violencias

    Directory of Open Access Journals (Sweden)

    Riaño Alcalá, Pilar

    2005-01-01

    Full Text Available El artículo examina las pugnas del recuerdo y el olvido en comunidades afectadas y divididas por la violencia. Mira a un proyecto de arte público comunitario que reunió mi investigación antropológica sobre jóvenes, memoria y violencia, el trabajo de arte público de la artista Suzanne Lacy, el trabajo comunitario de una coalición de organizaciones gubernamentales y no gubernamentales y el liderazgo de un grupo de residentes del barrio Antioquia en Medellín (Colombia. El proyecto de arte comunitario creó un museo de la memoria en un bus de transporte público como lugar activador de procesos de elaboración del duelo tanto a nivel individual como colectivo y como lugar para imaginarse el futuro mientras que se confrontan aspectos del duelo, la coexistencia pacífica y la reconciliación.

  14. Teaching With Educational Technology in the 21st Century: The Case of The Asian-Pasific Region

    Directory of Open Access Journals (Sweden)

    Abdullah KUZU

    2006-04-01

    Full Text Available Teaching With Educational Technology in the 21st Century: The Case of The Asian-Pasific Region Edited by Yukiko Inoue and Suzanne Bell Hersley: PA: Information Science Publishing, 2006 pp. 321, ISBN 1-59140-724-9 Reviewed by Dr. Abdullah KUZU Anadolu University Eskisehir-TURKEY This book was edited by Yukiko Inoue and Suzanne Bell, an educator and a librarian at the University of Guam, and published by Information Science Publishing in 2006. The book describes the opportunities, challenges and strategies of the technology-enhanced learning in the regional base, namely Asia-Pacific. The main goal of the book is to examine educational technology, learning theories, human learning and cognition; to provide successful experiences in higher education and educational technology; to explain the technology integration into teaching in geographically remote regions such as Guam and Micronesia; to support faculty members in technology use and achieve the reluctance, and to discuss the future trends in educational technology. The book can be recommended for students as well as the professionals such as university professors, researchers, learning center directors, librarians, media specialists, supervisors, and software and courseware designers who are interested in theory and practice of the educational technology, distance education and technology-enhanced learning in multicultural context. ORGANIZATION OF THE SESSIONS The book has nine chapters divided into five sections. Section I contain one chapter and provide an introduction to Guam and Micronesia. The selecting of this region as a case study based on their community that reflects diverse ethnic cultures influenced by European, American, Asian, and Micronesian populations. Guam is a regional learning center in western Pacific. Section II consists of two chapters. Chapter II concentrates on advanced technologies and e-learning, and describes an overview of educational technology, educational media in

  15. Electrical characteristics of the hydroxyapatite for biomedical applications; Caracteristicas electricas de la hidroxiapatita para aplicaciones biomedicas

    Energy Technology Data Exchange (ETDEWEB)

    Lopez Buisan N, M.G.; Mendez G, M.M. [Laboratorio de Corrosion, ESFM-IPN, 07738 Mexico D.F. (Mexico)

    2006-07-01

    The electric characteristics of hydroxyapatite films were studied (HAP) deposited on metallic substrates oxidized naturally. The substrates was made of steel 316L and of titanium. These materials are used in reconstructive surgery for prosthesis and osseous implants. The studies were carried out with the techniques of potentiostatic polarization and faraday impedance. The potentiostatic polarization reveals that the very well-known piezoelectricity of the HAp subsists after the coating processes (it captures thermal and spray-pyrolysis). Its also revealed a semiconductor behavior of the HAp that until now had not been reported. This characteristic is important, by its relationship with the stability of the HAp coating in front of corrosion processes in the alive tissues. The results of the impedance tests were mathematically analyzed starting from the Nyquist diagrams, of Bode and of power. The physical interpretation is presented under the form of equivalent circuits (CE). In the case of the HAp on a steel 316L substrate, the CE is a Rancles-Voigt module that corresponds to the behavior of a dielectric with flights. In the case of the titanium substrate an element of constant phase appears to high frequencies (CPE), in series with the Rancles-Voigt module. The CPE reveals the presence of a rectifier of the metal/SC-n type that only it could be located in the interface among the titanium and its natural oxide (TiO{sub 2}). The absence of the CPE in the case of the steel 316L substrate indicates that the natural oxide (Cr{sub 2}O{sub 3}) it doesn't form with the steel a Schottky diode, possibly because the chromite is as a SC-n degenerate. On the interface Ti/TiO{sub 2} exists results qualitatively identical by other researchers that have worked with the same impedance technique, but applied by humid via (EIS). The CE that have proposed are based on the anodic processes of accretion/dissolution of the film at low pH. This proposal is questioned by our results

  16. Constructions participiales absolues et liaisons de prédications : au-delà du lien syndétique

    Directory of Open Access Journals (Sweden)

    Havu Eva

    2016-01-01

    Full Text Available Historiquement reliée à l’ablatif absolu de la grammaire latine, la proposition ou construction absolue (CPA qui associe « deux termes dans une relation prédicative, sans expliciter par une marque formelle leur rapport entre elles, ni avec le reste de l’énoncé » (Riegel et al. 2009 : 356 a été évoquée par nombre de linguistes, mais c’est surtout Suzanne Hanon (1989 qui y a consacré un ouvrage entier. Le second terme peut prendre la forme d’un adjectif (Il se promenait, la tête basse, d’un groupe prépositionnel (Il se promenait les mains dans les poches ou encore d’un participe prédicatif, le cas que nous examinerons ici (Son amie rentrant demain, il a nettoyé l’appartement.. L’examen des traits définitoires de la construction participiale absolue révèle des caractéristiques paradoxales : D’une part, elle se situe dans un rapport de dépendance/ subordination par rapport à une prédication régissante, et même si elle constitue une prédication (une « phrase », il y a toujours absence de flexion verbale marquant l’accord de personne, le temps, le mode ou l’aspect. D’autre part, il y a absence de lien/ marque syndétique du rapport entre la CPA et la proposition régissante : Aucun connecteur de type adverbial, prépositionnel ou conjonctionnel n’indique donc obligatoirement la relation, ce qui engendre un fonctionnement apparemment autonome.Notre contribution se donne pour but de préciser le mode de fonctionnement et le statut des constructions participiales absolues.

  17. Sulfation of fulvestrant by human liver cytosols and recombinant SULT1A1 and SULT1E1

    Directory of Open Access Journals (Sweden)

    Edavana VK

    2011-11-01

    Full Text Available Vineetha Koroth Edavana1, Xinfeng Yu1, Ishwori B Dhakal1, Suzanne Williams1, Baitang Ning2, Ian T Cook3, David Caldwell1, Charles N Falany3, Susan Kadlubar11Division of Medical Genetics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA; 2Division of Personalized Nutrition and Medicine, National Center for Toxicological Research, Food and Drug Administration, Jefferson, AR, USA; 3Department of Pharmacology, University of Alabama, Birmingham, AL, USAAbstract: Fulvestrant (Faslodex™ is a pure antiestrogen that is approved to treat hormone receptor-positive metastatic breast cancer in postmenopausal women. Previous studies have demonstrated that fulvestrant metabolism in humans involves cytochromes P450 and UDP-glucuronosyltransferases (UGTs. To date, fulvestrant sulfation has not been characterized. This study examined fulvestrant sulfation with nine recombinant sulfotransferases and found that only SULT1A1 and SULT1E1 displayed catalytic activity toward this substrate, with Km of 4.2 ± 0.99 and 0.2 ± 0.16 µM, respectively. In vitro assays of 104 human liver cytosols revealed marked individual variability that was highly correlated with β-naphthol sulfation (SULT1A1 diagnostic substrate; r = 0.98, P < 0.0001, but not with 17ß-estradiol sulfation (SULT1E1 diagnostic substrate; r = 0.16, P = 0.10. Fulvestrant sulfation was correlated with both SULT1A1*1/2 genotype (P value = 0.023 and copy number (P < 0.0001. These studies suggest that factors influencing SULT1A1/1E1 tissue expression and/or enzymatic activity could influence the efficacy of fulvestrant therapy.Keywords: fulvestrant, sulfotransferase, genotype, copy number

  18. Copy number variation in sulfotransferase isoform 1A1 (SULT1A1 is significantly associated with enzymatic activity in Japanese subjects

    Directory of Open Access Journals (Sweden)

    Yu X

    2013-03-01

    Full Text Available Xinfeng Yu,1 Takahiro Kubota,2 Ishwori Dhakal,1 Setsuo Hasegawa,3 Suzanne Williams,1 Shogo Ozawa,4 Susan Kadlubar11Division of Medical Genetics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA; 2Chiba Institute of Science, Chiba, Japan; 3Sekino Clinical Pharmacology Clinic, Tokyo, Japan; 4Iwate Medical University, Iwate, JapanAbstract: Sulfotransferase isoform 1A1 (SULT1A1 plays a key role in the metabolism of a variety of endo- and xenobiotics and it's activity could influence response to drugs. Our previous studies have focused on the impact of genetic variants of SULT1A1 on enzymatic activity in Caucasians and African-Americans. However, the contribution of genetic variants to SULT1A1 activity in Asians has not been explored. In this study, we investigated the collective effects of both SULT1A1 copy number variants (CNVs and single nucleotide polymorphisms (SNPs in the promoter region, coding region, and 3´ untranslated region on SULT1A1 activity in Japanese subjects. SNPs in the SULT1A1 promoter and 3´ untranslated region were not associated with SULT1A1 activity (P > 0.05. SULT1A1*1/2 (Arg213His was marginally associated with SULT1A1 activity (P = 0.037. However, SULT1A1 CNVs were strongly associated with SULT1A1 activity (trend test P = 0.008 and accounted for 10% of the observed variability in activity for Japanese subjects. In conclusion, SULT1A1 CNVs play a pivotal role in determination of SULT1A1 activity in Japanese subjects, highlighting the influence of ethnic differences in SULT1A1 genetic variants on drug metabolism and therapeutic efficacy.Keywords: CNV, genotype, phenotype, SULT1A1, single nucleotide polymorphisms

  19. Management of the frozen shoulder

    Directory of Open Access Journals (Sweden)

    van de Laar SM

    2014-10-01

    Full Text Available Suzanne Margaretha van de Laar, Peer van der Zwaal Department of Orthopaedic Surgery and Trauma, Medical Center Haaglanden, The Hague, the Netherlands Abstract: Frozen shoulder is a very common condition with a prevalence of 2%–5% in the general population. Decrease in joint volume as a result of fibrosis and hyperplasia of the joint capsule leads to painful and restricted glenohumeral motion. Frozen shoulder is a self-limiting disease with a chronic character, and is mostly treated in a primary care setting. In this review, we set out to address the current evidence-based literature on management of this disabling disease using a PubMed search. Many non-surgical and surgical therapeutic options are described, including supervised neglect, intra-articular corticosteroid injections, physical therapy, manipulation under anesthesia, capsular distension, and arthroscopic capsular release. In the literature, the long-term outcome shows a significant decrease in pain and improvement of shoulder function for all treatment modalities without clear evidence of superiority of one over the other. This possibly indicates that a self-limiting character is the most important factor in the course of the disease. Management of frozen shoulder is primarily conservative. Supervised neglect is combined with analgesia and stretching exercises as the pain subsides. In the early painful phase, intra-articular corticosteroid injections are recommended for pain relief. When the patient has persistent pain and glenohumeral stiffness after adequate conservative treatment, invasive options can be considered, like arthroscopic capsular release, manipulation under anesthesia, or capsular distension. Keywords: frozen shoulder, adhesive capsulitis, treatment, pathophysiology

  20. Prospective, open-label trial measuring satisfaction and convenience of two formulations of lamotrigine in subjects with mood disorders

    Directory of Open Access Journals (Sweden)

    Sajatovic M

    2013-05-01

    Full Text Available Martha Sajatovic,1 Thomas R Thompson,2 Kevin Nanry,3 Suzanne Edwards,2 Ranjani Manjunath21Case Western Reserve University School of Medicine and University Hospitals of Cleveland, Cleveland, OH, 2GlaxoSmithKline, Research Triangle Park, NC; 3Quintiles, Durham, NC, USABackground: Lamotrigine is an anticonvulsant drug indicated for the maintenance treatment of bipolar I disorder and for various types of epilepsy. An orally disintegrating tablet (ODT of lamotrigine was developed to provide a formulation option that might increase patient convenience and satisfaction.Methods: Subjects with mood disorders who reported difficulty swallowing currently prescribed lamotrigine immediate-release medication (baseline were enrolled and treated with lamotrigine ODT for three weeks (end of treatment. Subject satisfaction and convenience were measured using the Treatment Satisfaction Questionnaire for Medication (TSQM. Also measured were global psychopathology using the Clinical Global Impression severity index (CGI-S and depressive symptoms using the Beck Depression Inventory (BDI-II.Results: Lamotrigine ODT was found to be significantly more convenient to use than lamotrigine immediate-release (change in baseline TSQM convenience score: 23.3, n = 97, P < 0.001. The mean TSQM global satisfaction score was similar at baseline (76.3 and after treatment with lamotrigine ODT (76.0. There were no significant changes on CGI-S and BDI-II.Conclusion: Subjects reported that lamotrigine ODT was significantly more convenient than lamotrigine immediate-release, while both formulations were associated with good satisfaction. Lamotrigine ODT may be a treatment option for patients who have difficulty swallowing medication.Keywords: lamotrigine, epilepsy, antiepileptic drug, bipolar disorder, mood disorder

  1. PREFACE: High Performance Computing Symposium 2011

    Science.gov (United States)

    Talon, Suzanne; Mousseau, Normand; Peslherbe, Gilles; Bertrand, François; Gauthier, Pierre; Kadem, Lyes; Moitessier, Nicolas; Rouleau, Guy; Wittig, Rod

    2012-02-01

    HPCS (High Performance Computing Symposium) is a multidisciplinary conference that focuses on research involving High Performance Computing and its application. Attended by Canadian and international experts and renowned researchers in the sciences, all areas of engineering, the applied sciences, medicine and life sciences, mathematics, the humanities and social sciences, it is Canada's pre-eminent forum for HPC. The 25th edition was held in Montréal, at the Université du Québec à Montréal, from 15-17 June and focused on HPC in Medical Science. The conference was preceded by tutorials held at Concordia University, where 56 participants learned about HPC best practices, GPU computing, parallel computing, debugging and a number of high-level languages. 274 participants from six countries attended the main conference, which involved 11 invited and 37 contributed oral presentations, 33 posters, and an exhibit hall with 16 booths from our sponsors. The work that follows is a collection of papers presented at the conference covering HPC topics ranging from computer science to bioinformatics. They are divided here into four sections: HPC in Engineering, Physics and Materials Science, HPC in Medical Science, HPC Enabling to Explore our World and New Algorithms for HPC. We would once more like to thank the participants and invited speakers, the members of the Scientific Committee, the referees who spent time reviewing the papers and our invaluable sponsors. To hear the invited talks and learn about 25 years of HPC development in Canada visit the Symposium website: http://2011.hpcs.ca/lang/en/conference/keynote-speakers/ Enjoy the excellent papers that follow, and we look forward to seeing you in Vancouver for HPCS 2012! Gilles Peslherbe Chair of the Scientific Committee Normand Mousseau Co-Chair of HPCS 2011 Suzanne Talon Chair of the Organizing Committee UQAM Sponsors The PDF also contains photographs from the conference banquet.

  2. Entre el experimento sociológico y la manipulación: el hiperreal en The Hunger Games

    Directory of Open Access Journals (Sweden)

    María Isabel Menéndez Menéndez

    2014-12-01

    Full Text Available Los programas de telerrealidad se han convertido en protagonistas de las pantallas televisivas, configurando un ejemplo de lo que Baudrillard denominó hiperreal y que es la base argumental de la trilogía The Hunger Games de Suzanne Collins. Se trata de un producto dirigido a jóvenes que presenta grandes diferencias con la mayoría de obras dirigidas al mismo público. Su argumento describe un programa extremo de reality donde adolescentes de ambos sexos deben luchar a muerte entre sí, observados por toda la población y controlados por el poder político y mediático. El enorme éxito de las novelas y sus adaptaciones cinematográficas, así como la originalidad de una propuesta muy connotada políticamente, explican la relevancia e interés sociológico de este artículo. Mediante un enfoque teórico deductivo, el texto ofrece una lectura crítica sobre un producto mainstream y a la vez insólito, estableciendo puntos de contacto entre el hiperreal y la sociedad de hoy. Así, se puede afirmar que el simulacro de distopía o mundo futuro en el que se desarrolla la historia constituye una crítica a la desigualdad social, económica y tecnológica que ya existe en el mundo actual y que se propone al público juvenil como elemento de reflexión crítica.

  3. Correlations between Crustal Structure and Slip on the Cascadia Megathrust (Invited)

    Science.gov (United States)

    Trehu, A. M.

    2013-12-01

    A number of active-source seismic imaging experiments of the Cascadia forearc margin have been conducted over the past three decades. Seismic P-wave velocity models derived from these experiments, when combined with geodetic, potential field, morphological and other data, reveal structures in both the upper and lower plate that can be correlated with current microseismic activity, geodetic signals indicating interplate locking, and apparent segmentation of past large plate boundary earthquakes as determined from onshore and offshore paleoseismic data. These data are being interpreted to construct maps of the apparent seismic velocity structure averaged over several km above and below the expected plate boundary and extending from the region characterized by episodic tremor and slip up dip to the deformation front. Preliminary results for the recent CIET, COAST and Ridge-to-Trench experiments that support, challenge or extend an evolving working model for structural constraints on plate boundary deformation in Cascadia will also be discussed. Other co-PIs who have planned and executed the CIET, COAST and Ridge-to-Trench experiments are listed below with the lead PI for each group listed first. CIET (Cascadia Initiative Science Team): Doug Toomey, Emilie Hooft (both at Un. of Oregon); Bob Dziak (Oregon State Un. NOAA); William Wilcock (Un. Washington); Susan Schwartz (UC Santa Cruz); John Collins, Jeff McGuire (WHOI); Maya Tolstoy (LDEO); Richard Allen (UC Berkeley) COAST (Cascadia Open-Access Seismic Transects): Steve Holbrook (Un. Wyoming); Graham Kent (Un. Nevada Reno); Katie Keranen (Un. Oklahoma); Paul Johnson (Un. Washington); Jackie Caplan-Auerbach (Western Washington Un.); Harold Tobin (Un. Wisconson) Ridge-to-Trench: Suzanne Carbotte, Helene Carton, Geoff Abers (all at LDEO); Pablo Canales (WHOI); Mladen Nedimovic (Dalhousie Un.)

  4. Hyperhomocysteinemia and vascular access thrombosis in hemodialysis patients: a retrospective study

    Directory of Open Access Journals (Sweden)

    Saifan C

    2013-07-01

    Full Text Available Chadi Saifan, Elie El-Charabaty, Suzanne El-SayeghStaten Island University Hospital, Staten Island, NY, USABackground: Elevated total plasma homocysteine is an independent risk factor for arterial and venous thrombosis in patients with normal renal function. Patients on hemodialysis have a high prevalence of mild to moderate hyperhomocysteinemia. Conflicting retrospective analyses and prospective studies have been reported regarding the association between total homocysteine levels and hemodialysis vascular thrombosis. The purpose of this retrospective study was to investigate the relationship between hyperhomocysteinemia and vascular access thrombosis (VAT in patients on hemodialysis.Methods: One hundred and twenty-five patients undergoing dialysis were selected as subjects. The experimental group participants were identified as those having one or more VAT during the previous 13 months and the control group participants had no access thrombosis during the same period. Additional subgroup analysis included the presence of hypertension, diabetes, low-density lipoprotein levels, sex, and use of aspirin.Results: No statistically significant difference was found in total homocysteine levels between the two groups (P = 0.27. No association was found between VAT and sex (P = 0.09, VAT and hypertension (P = 0.96, VAT and diabetes (P = 0.49, nor VAT and low-density lipoprotein level (P = 0.04. A lower rate of VAT was associated with aspirin intake (P = 0.04.Conclusion: This study did not demonstrate a relationship between total homocysteine concentrations and risk of VAT in patients with end-stage renal disease on hemodialysis. There were no significant differences in the number of VAT across additional variables of sex and previous morbidity. Aspirin intake was associated with a lower incidence of VAT.Keywords: hyperhomocysteinemia, vascular access thrombosis, hemodialysis

  5. Treatment of confirmed B12 deficiency in hemodialysis patients improves Epogen® requirements

    Directory of Open Access Journals (Sweden)

    Saifan C

    2013-06-01

    Full Text Available Chadi Saifan, Mark Samarneh, Norbert Shtaynberg, Rabih Nasr, Elie El-Charabaty, Suzanne El-Sayegh Division of Nephrology, Staten Island University Hospital, Staten Island, NY, USA Background: Vitamin B12 deficiency may have deleterious effects on end stage renal disease (ESRD patients on maintenance hemodialysis, and may increase erythropoietin stimulating agent (ESA resistance, yet little is known about its prevalence in this population. Methods: Serum Vitamin B12 and methylmalonic acid (MMA levels were drawn from ESRD patients prior to hemodialysis. All patients with MMA levels greater than 800 nmol/L had peripheral smears evaluated for B12 deficiency. Those with confirmatory smears were considered to be deficient and received intramuscular vitamin B12 injections for 4 months. Post-treatment MMA levels and smears were obtained. Erythropoietin dosages were monitored throughout the treatment period. Results: There was a 58% (60/103 prevalence of vitamin B12 deficiency as defined by a positive MMA level and a positive blood smear. Out of 52 patients with positive smears, 36 (69.2% were negative on repeat analysis after B12 treatment. Mean Epogen® (EPO dosages significantly decreased by 16,572 ± 41,902 units per month from baseline to the post-B12 treatment period (P = 0.0082, Wilcoxon signed-rank test. Three months prior to treatment, the mean monthly EPO dose was 82,067 ± 47,906 and post, the mean EPO usage was 65,495 ± 39,691. Post treatment hemoglobin levels were not significantly different from baseline. Conclusion: Vitamin B12 supplementation was associated with a decrease in the mean dose of ESA administration while maintaining a stable hemoglobin level. Maintaining serum vitamin B12 levels improves functionality, and may allow a decrease in the use of ESA’s, avoiding their toxicities and significant costs. Keywords: ESRD, end stage renal disease, chronic kidney disease, anemia, vitamin deficiency, erythropoietin, dialysis

  6. Final Progress Report: Developing Ethical Practices for Genetics Testing in the Workplace

    Energy Technology Data Exchange (ETDEWEB)

    Laura Roberts, MD; Teddy Warner, PhD

    2008-05-14

    Our multidisciplinary research team for this project involved collaboration between the Department of Psychiatry and Behavioral Medicine at the Medical College of Wisconsin (MCW) and the Department of Family and Community Medicine at the University of New Mexico Health Sciences Center (UNM HSC). Our research team in Wisconsin was led by Laura Roberts, M.D., Principal Investigator, and included Scott Helberg, MLS (Project Coordinator), Kate Green Hammond, Ph.D. (Consultant), Krisy Edenharder (Research Coordinator), and Mark Talatzko (Research Assistant). Our New Mexico-based team was led by Teddy Warner, Ph.D., Co-Principal Investigator and UNM Site Principal Investigator, and included Suzanne Roybal (Project Assistant), Darlyn Mabon (Project Assistant), Kate Green Hammond, PhD (Senior Research Scientist on the UNM team from 2004 until January, 2007), and Paulette Christopher (Research Assistant). In addition, computer technical and web support for the web-based survey conducted on a secure server at the University of New Mexico was provided by Kevin Wiley and Kim Hagen of the Systems and Programming Team of the Health Sciences Center Library and Information Center. We stated 3 aims in the grant proposal: (1) To collect web survey reports of the ethical perspectives, concerns, preferences and decision-making related to genetic testing using surveys from employees at: (a) Los Alamos National Laboratory (LANL); (b) Sandia National Laboratories (SNL); and (c) the University of New Mexico Health Sciences Center (UNMHSC); (2) To perform an extensive literature search and the extant survey data to develop evidence-based policy recommendations for ethically sound genetic testing associated with research and occupational health activities in the workplace; and, (3) To host a conference at the Medical College of Wisconsin to provide employers, workers, health professionals, researchers, the public, and the media an opportunity to consider ethical issues involved in genetic

  7. Health coaching for glaucoma care: a pilot study using mixed methods

    Directory of Open Access Journals (Sweden)

    Vin A

    2015-10-01

    Full Text Available Anita Vin,1 Suzanne Schneider,2 Kelly W Muir,1,3 Jullia A Rosdahl11Department of Ophthalmology, Duke University, Durham, NC, 2Department of Health Philosophy and Promotion, Maryland University of Integrative Health, Laurel, MD, 3Durham VA Medical Center, Durham, NC, USAIntroduction: Adherence to glaucoma medications is essential for successful treatment of the disease but is complex and difficult for many of our patients. Health coaching has been used successfully in the treatment of other chronic diseases. This pilot study explores the use of health coaching for glaucoma care.Methods: A mixed methods study design was used to assess the health coaching intervention for glaucoma patients. The health coaching intervention consisted of four to six health coaching sessions with a certified health coach via telephone. Quantitative measures included demographic and health information, adherence to glaucoma medications (using the visual analog adherence scale and medication event monitoring system, and an exit survey rating the experience. Qualitative measures included a precoaching health questionnaire, notes made by the coach during the intervention, and an exit interview with the subjects at the end of the study.Results: Four glaucoma patients participated in the study; all derived benefits from the health coaching. Study subjects demonstrated increased glaucoma drop adherence in response to the coaching intervention, in both visual analog scale and medication event monitoring system. Study subjects’ qualitative feedback reflected a perceived improvement in both eye and general health self-care. The subjects stated that they would recommend health coaching to friends or family members.Conclusion: Health coaching was helpful to the glaucoma patients in this study; it has the potential to improve glaucoma care and overall health.Keywords: motivation, behavior change, adherence, medication, health

  8. Book Review: Kaplan, S. (2008.Children in Genocide: Extreme traumatization and affect regulation, London: International Psychoanalysis Library

    Directory of Open Access Journals (Sweden)

    Carol Roderick, M.Ed., Ph.D.

    2010-12-01

    Full Text Available In Children in Genocide: Extreme traumatization and affect regulation (2008, Suzanne Kaplan explores the affects and memories of individuals who have survived extreme traumatization during their childhood, specifically Jewish survivors of the Holocaust and teenagers who survived the genocide in Rwanda in 1994. In the introduction, Kaplan explains that she has aimed to “write a text that can, to the greatest extent possible, convey a fraction of the feeling of what it meant to be a child during a genocide” (Kaplan, 2008, p.1. The majority of the book is devoted to presenting an analysis of the oral life histories of the survivors interviewed. The experiences are organized into three themes: 1 perforating, how the psychic shield is has been perforated by intense trauma; 2 space creating, the inner psychic processes through which the persecuted create mental space helps to survive the psychological damage and trauma; and 3 age distorting, a twisting of time that results in participants not feeling their actual chronological age. Age distorting is presented as containing aspects of perforating and space creating, and is linked to reproductive patterns of the survivors. A chronology of genocide events is used to organize these themes, through which the life histories of participants are presented in rich descriptive detail. Kaplan focuses both on the content of the interviews conducted as well as how the memories of the atrocities survived were recounted (the affects. The text provides readers with a glimpse into lived experience of these horrors in a manner that can only be achieved through narrative.

  9. Acupuncture and women's health: an overview of the role of acupuncture and its clinical management in women's reproductive health

    Directory of Open Access Journals (Sweden)

    Cochrane S

    2014-03-01

    Full Text Available Suzanne Cochrane,1 Caroline A Smith,2 Alphia Possamai-Inesedy,3 Alan Bensoussan2 1School of Science and Health, 2Centre for Complementary Medicine Research, 3School of Social Sciences and Psychology, University of Western Sydney – Campbelltown Campus, Penrith, NSW, Australia Background: Acupuncture and other modalities of Chinese/East Asian medicine have been used to treat women's health for many centuries. Gynecology specialties focus particularly on menstrual and reproductive disorders. Both the adoption of the use of acupuncture outside Asia, and the incorporation of scientific analysis in Asia have challenged biomedical conceptions of what can be achieved with this treatment method. The scale of research activity in relation to acupuncture and women's health has increased over the last 20 years. Objective: This review aims to explore the research evidence in relation to acupuncture use for women's reproductive disorders, focusing on both clinical findings and experimental research on acupuncture's mechanisms of action in relation to women's health. Methods: A narrative literature search was undertaken using searches of electronic databases and manual searches of journals and textbooks. The search included all literature published prior to June 2013. The literature was assessed as to the nature of the study it was reporting and findings synthesized into a commentary. Results: For acupuncture's mechanism of action the search resulted in 114 relevant documents; in relation to clinical reports on the use of acupuncture for women's health 204 documents were found and assessed. Conclusion: There is preliminary data indicating acupuncture may improve menstrual health and coping for women experiencing delays falling pregnant. There is experimental data showing that acupuncture can influence female reproductive functioning, although the actual mechanisms involved are not yet clarified. Further well-conducted clinical research would benefit our

  10. Birth of the Canadian Digestive Health Foundation.

    Science.gov (United States)

    Beck, Ivan T

    2004-01-01

    The Canadian Digestive Disease Foundation, renamed the Canadian Digestive Health Foundation--Fondation canadienne pour la promotion de la santé digestive--in December 2001, is the culmination of ongoing efforts by the Canadian Association of Gastroenterology to establish an independent charitable organization. In February 2001, it was officially endorsed as the Foundation for the Canadian Association of Gastroenterology. The initial efforts to establish this Foundation, led by Dr Richard McKenna in 1963, were unsuccessful. In 1991, Glaxo Canada (now GlaxoSmithKline) became a founding donor, and with the four founding physicians--Drs Ivan T Beck, Richard H Hunt, Suzanne E Lemire and Alan BR Thomson--the expenses to establish the Foundation were met. A charitable number was obtained in 1995 (0997427-11). The second founding donor was Janssen Canada (now Janssen-Ortho), and public education support came from Astra Canada (now AstraZeneca Canada). The Foundation initially relied on corporate donors, but now approaches physicians, patients and the general public. The objectives of the Foundation are to advance the science of gastroenterology and to provide knowledge of digestive diseases and nutrition to the general public, to enhance the quality of life of persons who are afflicted with these disorders. The major achievements of the Foundation are the provision of one-year operating grants to new investigators, which have allowed them to accumulate early data and subsequently obtain support from other major granting organizations. It also provides Fellowships and studentship support grants, in conjunction with the Canadian Institutes of Health Research and the pharmaceutical industry. The education committee found that there was little research support in this field, considering the large economic burden of digestive disease and the amount of outstanding work done by Canadian researchers. A bilingual Web site, a web-based specialist's discussion program and bilingual

  11. Monocyte chemoattractant protein-1: a proinflammatory cytokine elevated in sarcopenic obesity

    Directory of Open Access Journals (Sweden)

    Lim JP

    2015-03-01

    Full Text Available Jun Pei Lim,1,2 Bernard P Leung,3 Yew Yoong Ding,1,2 Laura Tay,1,2 Noor Hafizah Ismail,2,4 Audrey Yeo,2 Suzanne Yew,2 Mei Sian Chong1,2 1Department of Geriatric Medicine, 2Institute of Geriatrics and Active Ageing, 3Department of Rheumatology, Allergy and Immunology, 4Department of Community and Continuing Care, Tan Tock Seng Hospital, Singapore Objective: Sarcopenic obesity (SO is associated with poorer physical outcomes and functional status in the older adult. A proinflammatory milieu associated with central obesity is postulated to enhance muscle catabolism. We set out to examine associations of the chemokine monocyte chemoattractant protein-1 (MCP-1 in groups of older adults, with sarcopenia, obesity, and the SO phenotypes.Methods: A total of 143 community dwelling, well, older adults were recruited. Cross-sectional clinical data, physical performance, and muscle mass measurements were collected. Obesity and sarcopenia were defined using revised National Cholesterol Education Program (NCEP obesity guidelines and those of the Asian Working Group for Sarcopenia. Serum levels of MCP-1 were measured by enzyme-linked immunosorbent assay (ELISA.Results: In all, 25.2% of subjects were normal, 15.4% sarcopenic, 48.3% obese, and 11.2% were SO. The SO groups had the lowest appendicular lean mass, highest percentage body fat, and lowest performance scores on the Short Physical Performance Battery and grip strength. The MCP-1 levels were significantly different, with the highest levels found in SO participants (P<0.05.Conclusion: Significantly raised MCP-1 levels in obese and SO subjects support the theory of chronic inflammation due to excess adiposity. Longitudinal studies will reveal whether SO represents a continuum of obesity causing accelerated sarcopenia and cardiovascular events, or the coexistence of two separate conditions with synergistic effects affecting functional performance. Keywords: chemokine C-C motif ligand 2 (CCL-2, elderly

  12. Improved compliance and patient satisfaction with estradiol vaginal tablets in postmenopausal women previously treated with another local estrogen therapy

    Directory of Open Access Journals (Sweden)

    Minkin MJ

    2013-03-01

    Full Text Available Mary Jane Minkin,1 Ricardo Maamari,2 Suzanne Reiter31Obstetrics, Gynecology, and Menopause, Temple Medical Center, New Haven, CT, 2Hormone Therapy, Novo Nordisk Inc, Princeton, NJ, 3Mid-County Health Center, Largo, FL, USAAbstract: Up to half of all postmenopausal women will experience changes in the genitourinary tract induced by the hypoestrogenic state, collectively known as vaginal atrophy. Vaginally administered local estrogen therapy (LET is the standard of care for symptoms of vaginal atrophy that do not respond to nonhormonal interventions. Several LET formulations are available, and choice of therapy is based largely on patient needs and preferences. This online survey of postmenopausal LET users was conducted to investigate reasons for switching to vaginal estradiol tablets from other formulations and to evaluate factors associated with patient preference for and compliance with use of LET. Data was analyzed from 73 respondents currently using estradiol vaginal tablets who have previously used the estradiol vaginal ring, estradiol vaginal cream, and/or conjugated estrogen vaginal cream. Patients in this survey rated vaginal symptoms of vaginal atrophy as being more bothersome than urinary symptoms. Respondents preferred their current treatment with the vaginal tablet to their previous treatment with a cream or ring. The preference for tablets over creams was mainly related to formulation and application rather than to any perceived safety issues. Tablets were perceived as efficacious, convenient, and neat to apply. The study participants also reported a longer duration of tablet use compared with creams or rings, and greater compliance with vaginal tablets than with vaginal cream. This study provides new insights into reasons for patient noncompliance with estrogen cream or ring therapy that can be used to maximize patient adherence with LET.Keywords: vaginal atrophy, local estrogen therapy, estradiol, vaginal ring, vaginal tablet

  13. Transparency of the 2 μm (5000 cm-1) methane window in Titan's atmosphere and impact on retrieved surface reflectivity

    Science.gov (United States)

    Rannou, Pascal; Seignovert, Benoit; Le Mouélic, Stéphane; Sotin, Christophe

    2016-10-01

    The study of Titan properties with remote sensing relies on a good knowledge of the atmosphere properties. The in-situ observations made by Huygens combined with recent advances in the definition of methane properties enable to model and interpret observations with a very good accuracy. Thanks to these progresses, we can analyze in this work the observations made at the limb of Titan in order to retrieve information on the haze properties as its vertical profiles and its spectral behaviour along the VIMS/Cassini range (from 0.88 to 5.1 μm). However, for applications to real atmospheres, one need to account for the widening of the spectroscopic lines (e.g., Voigt profile) and apply an empirical cut-off of the far wings. In general, this is a multiplying function of the wavenumber, f(ν), applied to the Voigt profile that allows a faster decay of the wing profile beyond a given distance from the center of the line ν0 : f(ν)=1 if |ν- ν0| ≤ Δν, and f(ν)=exp(-|ν- ν0|/ σ) if |ν- ν0| > Δν. Although the 2-μm window is apparently straitforward to model, it appears that the standard cut-off parameters (that is Δν ~ 26 cm-1 and σ ~ 120 cm-1) which is used for other windows in Titan's atmosphere is not adequat for this window. Other sets of parameter must be used to reproduce Titan spectrum at 2 μm. However, there is no convergence of the results between these works and a large variety of cut-off parameters are used. Alternatively, it was found that some gas absorptions (ethane and another unknown gas) leave a signature around 2-μm and also affect the transparency in this window. In our study we make an exhaustive investigation on the cut-off parameters to determine which are the best couples of parameters to fit the 2-μm window. We also evaluated how gaseous absorptions can allow to reach a satisfactory agreement and, especially, if it allows to match observations with the standard cut-off. Finally, we investigate the impact of the different solutions

  14. A Boreal high-resolution composite carbon isotope record of the Albian to Turonian interval from the North German Basin

    Science.gov (United States)

    Bornemann, André; Erbacher, Jochen; Huck, Stefan; Heimhofer, Ulrich

    2017-04-01

    We present a potentially complete, six-hundred-meters-thick composite record of high-resolution bulk-rock carbon isotope data from northern Germany covering the topmost Lower Albian to Lower Turonian interval. The established composite record consists of more than 1700 measurements ana-lyzed from seven drill sites including the Kirchrode I and II cores (Nebe, 1999; Fenner, 2001), the Anderten I and II cores (Bornemann et al., 2017), two industrial cores Wunstorf 2011/2 and 2011/8 as well as the Wunstorf research core (Voigt et al., 2008). In the central North German Basin the Albian is represented by a several hundred meters-thick succession of clays and clayey marls, whereas the Lower Cenomanian is characterized by the transition from clayey to chalky sedimentation. The latter prevailed during the remaining Cenomanian. The top of the studied succession is marked by the prominent black shales of the Cenomanian-Turonian boundary event (CTBE). The isotope records display the carbon isotope expression of the Oceanic Anoxic Events 1d and 2 as well as the Lower and Mid-Cenomanian Events (LCE, MCE). The applied integrat-ed approach of high-resolution chemostratigraphy and revised biostratigraphy gives way for a substantial improvement of the Boreal Cretaceous stratigraphy. Fenner, J. (2001) The Kirchrode I and II boreholes: technical details and evidence on tectonics, and the palaeoceanographic development during the Albian. Palaeogeogr. Palaeoclimatol. Palaeoecol., 174, 33-65. Nebe, D. (1999) Zyklenuntersuchungen an unterkretazischen Sedimenten in NW-Deutschland - Nachweisbarkeit von Milankovitch-Zyklen [PhD thesis, Ruhr-Univ. Bochum]. Bornemann, A., Erbacher, J., Heldt, M., Kollaske, T., Lübke, N., Huck, S., Vollmar, N.M., Wilmsen, M. (2017) The Albian-Cenomanian transition and Oceanic Anoxic Event 1d - an example from the Boreal Realm. Sedimentol. [doi:10.1111/sed.12347]. Voigt, S., Erbacher, J., Mutterlose, J., Weiss, W., Westerhold, T., Wiese, F., Wilmsen, M

  15. Valence-Shell Excitations of Nitrous Oxide Studied by Fast Electron Impact

    Institute of Scientific and Technical Information of China (English)

    LIU Ya-Wei; WANG You-Yan; ZHU Lin-Fan

    2012-01-01

    The valence-shell excitations of nitrous oxide are studied by fast electron energy loss spectroscopy.From the spectra measured at 2.5keV and scattering angles of 3.5°-8.5°,it is found that the asymmetric peak of the transition B 1△ can be well fitted by Haarhoff-Van der Linde function,while the symmetric peaks of the transitions of C1Π and D1∑+ can be well fitted by the Voigt function.The parameters of the peak profiles of B1△,C1Π and D1∑+,i.e.,their energy level positions and linewidths,are determined.With the aid of these parameters,the overlapping spectra measured at the low-energy electron impact can be deconvolved,which provides the possibility to determine the quantitative differential cross sections.The present results also show that the peak profiles of the transitions of B1△,C1Π and D1∑+ are independent of the momentum transfer.%The valence-shell excitations of nitrous oxide are studied by fast electron energy loss spectroscopy. From the spectra measured at 2.5keV and scattering angles of 3.5°-8.5°, it is found that the asymmetric peak of the transition B1A can be well fitted by Haarhoff-Van der Linde function, while the symmetric peaks of the transitions of C1II. And D1∑+ can be well fitted by the Voigt function. The parameters of the peak profiles of B1△, C1II and D1∑+, I.e., their energy level positions and linewidths, are determined. With the aid of these parameters, the overlapping spectra measured at the low-energy electron impact can be deconvolved, which provides the possibility to determine the quantitative differential cross sections. The present results also show that the peak profiles of the transitions of B1△, C1II and D1∑+ are independent of the momentum transfer.

  16. Determination of the elastic constants of portlandite by Brillouin spectroscopy

    KAUST Repository

    Speziale, S.

    2008-10-01

    The single crystal elastic constants Cij and the shear and adiabatic bulk modulus of a natural portlandite (Ca(OH)2) crystal were determined by Brillouin spectroscopy at ambient conditions. The elastic constants, expressed in GPa, are: C11 = 102.0(± 2.0), C12 = 32.1(± 1.0), C13 = 8.4(± 0.4), C14 = 4.5(± 0.2), C33 = 33.6(± 0.7), C44 = 12.0(± 0.3), C66 = (C11-C12)/2 = 35.0(± 1.1), where the numbers in parentheses are 1σ standard deviations. The Reuss bounds of the adiabatic bulk and shear moduli are K0S = 26.0(± 0.3) GPa and G0 = 17.5(± 0.4) GPa, respectively, while the Voigt bounds of these moduli are K0S = 37.3(± 0.4) GPa and G0 = 24.4(± 0.3) GPa. The Reuss and Voigt bounds for the aggregate Young\\'s modulus are 42.8(± 1.0) GPa and 60.0(± 0.8) GPa respectively, while the aggregate Poisson\\'s ratio is equal to 0.23(± 0.01). Portlandite exhibits both large compressional elastic anisotropy with C11/C33 = 3.03(± 0.09) equivalent to that of the isostructural hydroxide brucite (Mg(OH)2), and large shear anisotropy with C66/C44 = 2.92(± 0.12) which is 11% larger than brucite. The comparison between the bulk modulus of portlandite and that of lime (CaO) confirms a systematic linear relationship between the bulk moduli of brucite-type simple hydroxides and the corresponding NaCl-type oxides. © 2008 Elsevier Ltd. All rights reserved.

  17. Sensitivity analysis of effective fluid and rock bulk modulus due to changes in pore pressure, temperature and saturation

    Science.gov (United States)

    Bhakta, Tuhin; Avseth, Per; Landrø, Martin

    2016-12-01

    Fluid substitution plays a vital role in time-lapse seismic modeling and interpretation. It is, therefore, very important to quantify as exactly as possible the changes in fluid bulk modulus due to changes in reservoir parameters. In this paper, we analyze the sensitivities in effective fluid bulk modulus due to changes in reservoir parameters like saturation, pore-pressure and temperature. The sensitivities are analyzed for two extreme bounds, i.e. the Voigt average and the Reuss average, for various fluid combinations (i.e. oil-water, gas-water and gas-oil). We quantify that the effects of pore-pressure and saturation changes are highest in the case of gas-water combination, while the effect of temperature is highest for oil-gas combination. Our results show that sensitivities vary with the bounds, even for same amount of changes in any reservoir parameter. In 4D rock physics studies, we often neglect the effects of pore-pressure or temperature changes assuming that those effects are negligible compare to the effect due to saturation change. Our analysis shows that pore-pressure and temperature changes can be vital and sometimes higher than the effect of saturation change. We investigate these effects on saturated rock bulk modulus. We first compute frame bulk modulus using the Modified Hashin Shtrikman (MHS) model for carbonate rocks and then perform fluid substitution using the Gassmann equation. We consider upper bound of the MHS as elastic behavior for stiffer rocks and lower bound of the MHS as elastic behavior for softer rocks. We then investigate four various combinations: stiff rock with upper bound (the Voigt bound) as effective fluid modulus, stiff rock with lower bound (Reuss bound) as effective fluid modulus, soft rock with upper bound as effective fluid modulus and soft rock with lower bound as effective fluid modulus. Our results show that the effect of any reservoir parameter change is highest for soft rock and lower bound combination and lowest

  18. Effect of substitution Fe2+on physical properties of MgSiO3 perovskite at high temperature and high pressure∗%Fe2取代对MgSiO3钙钛矿高温高压物性的影响

    Institute of Scientific and Technical Information of China (English)

    吴迪; 赵纪军; 田华

    2013-01-01

      (Mg, Fe)SiO3钙钛矿是下地幔中最主要的候选矿物成分之一,关于其高温高压特性的研究对于深层地幔状态的理解和地震波变化规律的探索具有重要意义.应用第一性原理计算了MgSiO3和(Mg0.75, Fe0.25)SiO3在0—140 GPa静水压范围内的晶体结构和弹性模量,并由Voigt-Reuss-Hill方程计算了地震波速随压力的变化,利用准简谐近似下的Debye模型模拟了高温效应,分析了Fe2+取代Mg2+后镁铁钙钛矿弹性和热学性质的变化,推断Fe2+取代行为软化了MgSiO3等含镁的地球深部矿物的地震波速.为解释地幔中某些区域的地震波速软化现象提供了一个有力的理论依据.%(Mg, Fe)SiO3-perovskite is currently considered to be the most abundant mineral in the earth’s lower mantle. Its behavior at high temperature and high pressure is crucial for interpreting conditions at the deep level of the mantle, variations of seismic waves, and so on. Equilibrium crystal structures and mechanics properties of MgSiO3 and (Mg0.75, Fe0.25)SiO3 are determined using first-principles calculations in a series of hydrostatic pressures up to 140 GPa. Seismic wave velocity as a function of pressure is derived from the Voigt-Reuss-Hill scheme. Their thermodynamic quantities under the conditions of the lower mantle’s pressures and temperatures are computed by means of the Debye model within the quasi-harmonic approximation. The substitution effect of Fe2+on the thermoelastic property for silicate perovskite is discussed. Substitution of Fe2+for Mg2+can provoke softening wave velocity phenomenon arising from the minerals containing Mg element located in the earth interior. The present theoretical results are useful for interpreting seismic wave velocity softened in certain areas of the mantle.

  19. The ESO UVES Advanced Data Products Quasar Sample - VI. Sub-Damped Lyman-$\\alpha$ Metallicity Measurements and the Circum-Galactic Medium

    CERN Document Server

    Quiret, S; Zafar, T; Kulkarni, V P; Jenkins, E D; Milliard, B; Rahmani, H; Popping, A; Sandhya, R M; Turnshek, D A; Monier, E M

    2016-01-01

    The Circum-Galactic Medium (CGM) can be probed through the analysis of absorbing systems in the line-of-sight to bright background quasars. We present measurements of the metallicity of a new sample of 15 sub-damped Lyman-$\\alpha$ absorbers (sub-DLAs, defined as absorbers with 19.0 < log N(H I) < 20.3) with redshift 0.584 < $\\rm z_{abs}$ < 3.104 from the ESO Ultra-Violet Echelle Spectrograph (UVES) Advanced Data Products Quasar Sample (EUADP). We combine these results with other measurements from the literature to produce a compilation of metallicity measurements for 92 sub-DLAs as well as a sample of 362 DLAs. We apply a multi-element analysis to quantify the amount of dust in these two classes of systems. We find that either the element depletion patterns in these systems differ from the Galactic depletion patterns or they have a different nucleosynthetic history than our own Galaxy. We propose a new method to derive the velocity width of absorption profiles, using the modeled Voigt profile feat...

  20. Nonlinear electroelastic vibration analysis of NEMS consisting of double-viscoelastic nanoplates

    Science.gov (United States)

    Ebrahimy, Farzad; Hosseini, S. Hamed S.

    2016-10-01

    The nonlinear electroelastic vibration behavior of viscoelastic nanoplates is investigated based on nonlocal elasticity theory. Employing nonlinear strain-displacement relations, the geometrical nonlinearity is modeled while governing equations are derived through Hamilton's principle and they are solved applying semi-analytical generalized differential quadrature (GDQ) method. Eringen's nonlocal elasticity theory takes into account the effect of small size, which enables the present model to become effective in the analysis and design of nanosensors and nanoactuators. Based on Kelvin-Voigt model, the influence of the viscoelastic coefficient is also discussed. It is demonstrated that the GDQ method has high precision and computational efficiency in the vibration analysis of viscoelastic nanoplates. The good agreement between the results of this article and those available in literature validated the presented approach. The detailed mathematical derivations are presented and numerical investigations are performed while the emphasis is placed on investigating the effect of the several parameters such as electric voltage, small-scale effects, van der Waals interaction, Winkler and Pasternak elastic coefficients, the viscidity and aspect ratio of the nanoplate on its nonlinear vibrational characteristics. It is explicitly shown that the electroelastic vibration behavior of viscoelastic nanoplates is significantly influenced by these effects. Numerical results are presented to serve as benchmarks for future analyses of viscoelastic nanoplates which are fundamental elements in nanoelectromechanical systems.

  1. Study on the relationships between Raman shifts and temperature range for a-plane GaN using temperature-dependent Raman scattering

    Institute of Scientific and Technical Information of China (English)

    Wang Dang-Hui; Xu Sheng-Rui; Hao Yue; Zhang Jin-Cheng; Xu Tian-Han; Lin Zhi-Yu; Zhou Hao

    2013-01-01

    In this paper,Raman shifts of a-plane GaN layers grown on r-plane sapphire substrates by low-pressure metal-organic chemical vapor deposition (LPMOCVD) are investigated.We compare the crystal qualities and study the relationships between Raman shift and temperature for conventional a-plane GaN epilayer and insertion A1N/A1GaN superlattice layers for a-plane GaN epilayer using temperature-dependent Raman scattering in a temperature range from 83 K to 503 K.The temperature-dependences of GaN phonon modes (A1 (TO),E2 (high),and E1 (TO)) and the linewidths of E2 (high) phonon peak are studied.The results indicate that there exist two mechanisms between phonon peaks in the whole temperature range,and the relationship can be fitted to the pseudo-Voigt function.From analytic results we find a critical temperature existing in the relationship,which can characterize the anharmonic effects of a-plane GaN in different temperature ranges.In the range of higher temperature,the relationship exhibits an approximately linear behavior,which is consistent with the analyzed results theoretically.

  2. The Effect of AGN Heating on the Low-redshift Lyα Forest

    Science.gov (United States)

    Gurvich, Alex; Burkhart, Blakesley; Bird, Simeon

    2017-02-01

    We investigate the effects of AGN heating and the ultraviolet background on the low-redshift Lyα forest column density distribution (CDD) using the Illustris simulation. We show that Illustris reproduces observations at z = 0.1 in the column density range {10}12.5{--}{10}13.5 cm‑2, relevant for the “photon underproduction crisis.” We attribute this to the inclusion of AGN feedback, which changes the gas distribution so as to mimic the effect of extra photons, as well as the use of the Faucher-Giguère ultraviolet background, which is more ionizing at z = 0.1 than the Haardt & Madau background previously considered. We show that the difference between simulations run with smoothed particle hydrodynamics and simulations using a moving mesh is small in this column density range but can be more significant at larger column densities. We further consider the effect of supernova feedback, Voigt profile fitting, and finite resolution, all of which we show to have little influence on the CDD. Finally, we identify a discrepancy between our simulations and observations at column densities {10}14{--}{10}16 cm‑2, where Illustris produces too few absorbers, which suggests the AGN feedback model should be further refined. Since the “photon underproduction crisis” primarily affects lower column density systems, we conclude that AGN feedback and standard ionizing background models can resolve the crisis.

  3. The analysis of thermoplastic characteristics of special polymer sulfur composite

    Science.gov (United States)

    Książek, Mariusz

    2017-01-01

    Specific chemical environments step out in the industry objects. Portland cement composites (concrete and mortar) were impregnated by using the special polymerized sulfur and technical soot as a filler (polymer sulfur composite). Sulfur and technical soot was applied as the industrial waste. Portland cement composites were made of the same aggregate, cement and water. The process of special polymer sulfur composite applied as the industrial waste is a thermal treatment process in the temperature of about 150-155°C. The result of such treatment is special polymer sulfur composite in a liquid state. This paper presents the plastic constants and coefficients of thermal expansion of special polymer sulfur composites, with isotropic porous matrix, reinforced by disoriented ellipsoidal inclusions with orthotropic symmetry of the thermoplastic properties. The investigations are based on the stochastic differential equations of solid mechanics. A model and algorithm for calculating the effective characteristics of special polymer sulfur composites are suggested. The effective thermoplastic characteristics of special polymer sulfur composites, with disoriented ellipsoidal inclusions, are calculated in two stages: First, the properties of materials with oriented inclusions are determined, and then effective constants of a composite with disoriented inclusions are determined on the basis of the Voigt or Rice scheme. A brief summary of new products related to special polymer sulfur composites is given as follows: Impregnation, repair, overlays and precast polymer concrete will be presented. Special polymer sulfur as polymer coating impregnation, which has received little attention in recent years, currently has some very interesting applications.

  4. Performance-based placement of manufactured viscoelastic dampers for design response spectrum

    Directory of Open Access Journals (Sweden)

    Yutaka eNakamura

    2016-05-01

    Full Text Available In this study, a viscoelastic damper (VED is developed by using a VE material with low temperature dependence, and a performance-based placement-design procedure of VEDs is developed for finding the storywise distribution of VEDs in a building such that each peak interstory drift coincides with the prescribed value. The mechanical properties of the employed VED’s dependence on amplitude and frequency of the excitation as well as material temperature are taken into account and a mechanical nonlinear four-element model that comprises two dashpot elements and two spring elements is proposed for the VED. The developed performance-based design procedure utilizes equivalent linearization of the VED and the expanded complete quadratic combination (CQC method, which involves modal analysis with complex eigenvalue analysis. An equivalent linear Voigt model of the VED is determined by the prescribed peak interstory drift and the fundamental natural period of the structure for which the VEDs are installed. Seismic response analyses are carried out for high-rise building models installed with the necessary number of wall-type VEDs, with the results demonstrating the effectiveness and validity of the proposed performance-based placement-design procedure.

  5. Optimized OpenCL implementation of the Elastodynamic Finite Integration Technique for viscoelastic media

    Science.gov (United States)

    Molero-Armenta, M.; Iturrarán-Viveros, Ursula; Aparicio, S.; Hernández, M. G.

    2014-10-01

    Development of parallel codes that are both scalable and portable for different processor architectures is a challenging task. To overcome this limitation we investigate the acceleration of the Elastodynamic Finite Integration Technique (EFIT) to model 2-D wave propagation in viscoelastic media by using modern parallel computing devices (PCDs), such as multi-core CPUs (central processing units) and GPUs (graphics processing units). For that purpose we choose the industry open standard Open Computing Language (OpenCL) and an open-source toolkit called PyOpenCL. The implementation is platform independent and can be used on AMD or NVIDIA GPUs as well as classical multi-core CPUs. The code is based on the Kelvin-Voigt mechanical model which has the gain of not requiring additional field variables. OpenCL performance can be in principle, improved once one can eliminate global memory access latency by using local memory. Our main contribution is the implementation of local memory and an analysis of performance of the local versus the global memory using eight different computing devices (including Kepler, one of the fastest and most efficient high performance computing technology) with various operating systems. The full implementation of the code is included.

  6. Analysis of magneto-optical properties for three-dimensional photonic crystals in high-symmetry arrangement doped by metamaterials and uniaxial materials

    Science.gov (United States)

    Yu, Bing; Li, Heming; Wang, Shenyun; Wan, Fayu; Ge, Junxiang

    2016-11-01

    In this paper, we use a modified plane wave expansion (PWE) method to investigate the properties of photonic band gaps (PBGs) for the extraordinary mode in the three-dimensional (3D) photonic crystals (PCs) which are composed of the anisotropic dielectric (the uniaxial materials) spheres immersed in the homogeneous metamaterials (epsilon-negative materials) background with high-symmetry (body-centered-cubic) lattices, as the magneto-optical Voigt effects are considered. The equations for calculating the PBGs in the first irreducible Brillouin zone are theoretically derived. It is numerically illustrated that the anisotropic PBGs and two flattened band regions can be achieved. The influences of the ordinary-refractive index, extraordinary-refractive index, filling factor of dielectric spheres, electronic plasma frequency and cyclotron frequency on the magneto-optical properties of such 3D PCs also are studied in detail, respectively, and some corresponding physical explanations are given. The numerical results demonstrate that the anisotropy can open partial band gaps in the proposed PCs, and the complete PBGs can be obtained compared with the conventional PCs only containing the isotropic material with similar structures. The bandwidths of PBGs can be tuned by introducing the epsilon-negative materials into such PCs containing the uniaxial materials. The anisotropic PBGs can be manipulated by the parameters as mentioned above. As the proposed PCs with high-symmetry lattices, the complete PBGs can be obtained by introducing the uniaxial materials.

  7. Application of a spring-dashpot system to clinical lung tumor motion data

    CERN Document Server

    Ackerley, E J; Wilson, P L; Berbeco, R I; Meyer, J

    2012-01-01

    A spring-dashpot system based on the Voigt model was developed to model the correlation between abdominal respiratory motion and tumor motion during lung radiotherapy. The model was applied to clinical data comprising 52 treatment beams from 10 patients, treated on the Mitsubishi Real-Time Radiation Therapy system, Sapporo, Japan. In Stage 1, model parameters were optimized for individual patients and beams to determine reference values and to investigate how well the model can describe the data. In Stage 2, for each patient the optimal parameters determined for a single beam were applied to data from other beams to investigate whether a beam-specific set of model parameters is sufficient to model tumor motion over a course of treatment. In Stage 1 the baseline root mean square (RMS) residual error for all individually-optimized beam data was 0.90 plus or minus 0.40 mm. In Stage 2, patient-specific model parameters based on a single beam were found to model the tumor position closely, even for irregular beam ...

  8. A study of the circum-galactic medium at z ~ 0.6 using DLA-galaxies

    CERN Document Server

    Rahmani, Hadi; Turnshek, David A; Rao, Sandhya M; Quiret, Samuel; Hamilton, Timothy S; Kulkarni, Varsha P; Monier, Eric M

    2016-01-01

    We present the study of a sample of nine QSO fields, with damped-Ly-alpha (DLA) or sub-DLA systems at z~0.6, observed with the X-Shooter spectrograph at the Very Large Telescope. By suitably positioning the X-Shooter slit based on high spatial resolution images of HST/ACS we are able to detect absorbing galaxies in 7 out of 9 fields (~ 78\\% success rate) at impact parameters from 10 to 30 kpc. In 5 out of 7 fields the absorbing galaxies are confirmed via detection of multiple emission lines at the redshift of DLAs where only 1 out of 5 also emits a faint continuum. In 2 out of these 5 fields we detect a second galaxy at the DLA redshift. Extinction corrected star formation rates (SFR) of these DLA-galaxies, estimated using their H-alpha fluxes, are in the range 0.3-6.7 M_sun yr^-1. The emission metallicities of these five DLA-galaxies are estimated to be from 0.2 to 0.9 Z_sun. Based on the Voigt profile fits to absorption lines we find the metallicity of the absorbing neutral gas to be in a range of 0.05--0.6...

  9. Observation of Mollow Triplets with Tunable Interactions in Double Lambda Systems of Individual Hole Spins

    Science.gov (United States)

    Lagoudakis, K. G.; Fischer, K. A.; Sarmiento, T.; McMahon, P. L.; Radulaski, M.; Zhang, J. L.; Kelaita, Y.; Dory, C.; Müller, K.; Vučković, J.

    2017-01-01

    Although individual spins in quantum dots have been studied extensively as qubits, their investigation under strong resonant driving in the scope of accessing Mollow physics is still an open question. Here, we have grown high quality positively charged quantum dots embedded in a planar microcavity that enable enhanced light-matter interactions. Under a strong magnetic field in the Voigt configuration, individual positively charged quantum dots provide a double lambda level structure. Using a combination of above-band and resonant excitation, we observe the formation of Mollow triplets on all optical transitions. We find that when the strong resonant drive power is used to tune the Mollow-triplet lines through each other, we observe anticrossings. We also demonstrate that the interaction that gives rise to the anticrossings can be controlled in strength by tuning the polarization of the resonant laser drive. Quantum-optical modeling of our system fully captures the experimentally observed spectra and provides insight on the complicated level structure that results from the strong driving of the double lambda system.

  10. Pressure broadening, -shift, speed dependence and line mixing in the ν3 rovibrational band of N2O

    Science.gov (United States)

    Loos, Joep; Birk, Manfred; Wagner, Georg

    2015-01-01

    In this paper, we report measured air-broadening, -shift, speed dependence and Rosenkranz line mixing parameters for the ν3 fundamental rovibrational band of N2O. A Bruker IFS 125HR Fourier transform spectrometer was used with a White-type multipass absorption cell with 46.4 m absorption path length to measure four ambient temperature air-broadened absorption spectra at total pressures ranging from 100 to 1000 mbar. A multispectrum fitting technique was used to retrieve parameters up to |m|=40 (m=-J″ and m=J″+1 for the P and R branch, respectively) utilizing the partially correlated quadratic speed-dependent hard collision model including Rosenkranz line mixing. Speed dependence of the broadening parameter as well as line mixing could be observed in the spectra. The broadening parameters are compared to HITRAN2012, where deviations can be ascribed to the influence of neglecting speed dependence effects in spectra analyses when using the Voigt line profile. The line mixing coefficients show a smooth dependence on m.

  11. A computational method to help identify and measure metal lines in high resolution QSO spectra

    Institute of Scientific and Technical Information of China (English)

    Xi-Heng Shi; David Tytler; Jin-Liang Hou; David Kirkman; Jeffery Lee; Benjamin Ou

    2011-01-01

    A computational code is developed to help identify metal absorption lines in high resolution QSO spectra,especially in the Lyα forest.The input to the code includes a list of line central wavelengths,column densities and Doppler widths.The code then searches for candidate metal absorption systems and assesses the probability that each system could be real.The framework of the strategy we employ is described in detail and we discuss how to estimate the errors in line profile fitting that are essential to identification.A series of artificial spectra is constructed to calibrate the performance of the code.Due to the effects of blending and noise on Voigt profile fitting,the completeness of the identification depends on the column density of absorbers.For intermediate and strong artificial metal absorbers,more than 90% could be confirmed by the code.The results of applying the code to the real spectra of QSOs HS0757+5218 and Q0100+1300 are also presented.

  12. Vertical Dynamic Response of Pile Embedded in Layered Transversely Isotropic Soil

    Directory of Open Access Journals (Sweden)

    Wenbing Wu

    2014-01-01

    Full Text Available The dynamic response of pile embedded in layered transversely isotropic soil and subjected to arbitrary vertical harmonic force is investigated. Based on the viscoelastic constitutive relations for a transversely isotropic medium, the dynamic governing equation of the transversely isotropic soil is obtained in cylindrical coordinates. By introducing the fictitious soil pile model and the distributed Voigt model, the governing equations of soil-pile system are also derived. Firstly, the vertical response of the soil layer is solved by using the Laplace transform technique and the separation of variables technique. Secondly, the analytical solution of velocity response in the frequency domain and its corresponding semianalytical solution of velocity response in the time domain are derived by means of inverse Fourier transform and convolution theorem. Finally, based on the obtained solutions, a parametric study has been conducted to investigate the influence of the soil anisotropy on the vertical dynamic response of pile. It can be seen that the influence of the shear modulus of soil in the vertical plane on the dynamic response of pile is more notable than the influence of the shear modulus of soil in the horizontal plane on the dynamic response of pile.

  13. Line-of-Sight Observables Algorithms for the Helioseismic and Magnetic Imager (HMI) Instrument Tested with Interferometric Bidimensional Spectrometer (IBIS) Observations

    Science.gov (United States)

    Couvidat, Sébastien; Rajaguru, S. P.; Wachter, Richard; Sankarasubramanian, K.; Schou, Jesper; Scherrer, Philip H.

    2012-05-01

    The Helioseismic and Magnetic Imager (HMI) instrument onboard the Solar Dynamics Observatory produces line-of-sight (LOS) observables (Doppler velocity, magnetic-field strength, Fe i line width, line depth, and continuum intensity) as well as vector magnetic-field maps at the solar surface. The accuracy of LOS observables is dependent on the algorithm used to translate a sequence of HMI filtergrams into the corresponding observables. Using one hour of high-cadence imaging spectropolarimetric observations of a sunspot in the Fe i line at 6173 Å through the Interferometric Bidimensional Spectrometer installed at the Dunn Solar Telescope, and the Milne-Eddington inversion of the corresponding Stokes vectors, we test the accuracy of the observables algorithm currently implemented in the HMI data-analysis pipeline: the MDI-like algorithm. In an attempt to improve the accuracy of HMI observables, we also compare this algorithm to others that may be implemented in the future: a least-squares fit with a Gaussian profile, a least-squares fit with a Voigt profile, and the use of second Fourier coefficients in the MDI-like algorithm.

  14. Indices of zooplankton community as valuable tools in assessing the trophic state and water quality of eutrophic lakes: long term study of Lake Võrtsjärv

    Directory of Open Access Journals (Sweden)

    Juta Haberman

    2014-03-01

    Full Text Available On the basis of long-term (1964-2011 research, we tested the hypothesis that the zooplankton community has a highly indicative value in assessing the ecosystem and trophic state of water bodies. Basing on the results of our study and taking into account relevant data from numerous zooplankton studies, we can conclude that the zooplankton measures deserving to be used as indicators in the monitoring of Lake Võrtsjärv (and other similar eutrophic water bodies could be the following: i indicatory species of eutrophic waters [Anuraeopsis fissa (Gosse, Keratella tecta (Gosse, Trichocerca rousseleti (Voigt, Chydorus sphaericus (O. F. Müller, Bosmina longirostris (O. F. Müller]; ii indicatory species of oligo-mesotrophic waters [Conochilus unicornis Rousselet, Kellicottia longispina (Kellicott, Ploesoma hudsoni (Imhof, Bosmina berolinensis Imhof, Eudiaptomus gracilis (Sars]; iii number and diversity of species; iv mean zooplankter weight, mean cladoceran weight, mean rotifer weight and mean copepod weight; v rotifer abundance; vi the share (% of rotifers in total zooplankton abundance; vii the ratio of abundance of large cladocerans to abundance of all cladocerans (NLargeClad/NClad; viii the ratio of calanoid copepod abundance to cyclopoid copepod abundance (NCal/NCycl; ix the ratio of crustacean abundance to rotifer abundance (NCrust/NRot . The results of our study show that several zooplankton parameters are among the biological quality elements (BQE deserving to be included in the Water Frame Directive system.

  15. Small angle X-ray scattering study of poly(N-isopropyl acrylamide) based cryogels near the volume-phase transition temperature

    Energy Technology Data Exchange (ETDEWEB)

    Chalal, Mohand [Laboratoire d' Electronique Quantique, Faculte de Physique, USTHB Alger, 16111 Alger (Algeria); Ehrburger-Dolle, Francoise; Morfin, Isabelle [Laboratoire de Spectrometrie Physique, UMR 5588 CNRS/UJF, 38402 Saint Martin d' Heres (France); Armas, Maria-Rosa Aguilar de; Lopez, Maria-Luisa [Instituto de Ciencia y TecnologIa de PolImeros, CSIC and CIBER-BBN, 28006 Madrid (Spain); Bley, Francoise, E-mail: francoise.ehrburger-dolle@ujf-grenoble.f [Science et Ingenierie des Materiaux et Procedes, UMR 5266 CNRS/INPG/UJF, 38402 Saint Martin d' Heres (France)

    2010-10-01

    The structural modifications induced by changes in temperature are investigated by Small-Angle X-ray Scattering (SAXS) over a broad range of q-values (3.5x10{sup -2} - 12 nm{sup -1}) in cryogels based on N-isopropylacrylamide (NIPA) and/or 2-Hydroxyethyl methacrylate-L-Lactide-Dextran (HEMA-LLA-D) macromer. Various copolymeric cryogels of these two monomers are prepared by cryopolymerization yielding macroporous gels (cryogels). For the plain pNIPA cryogel, the SAXS curves obtained at each temperature are well fitted by a sum of four equations describing respectively the scattering resulting from the gel surface (power law), from the solid-like (Guinier equation) and liquid-like (Ornstein-Zernike equation) heterogeneities and from the chain-chain correlation yielding a broad peak (pseudo-Voigt equation) in the high-q domain. The temperature dependence of the parameters obtained from the fit is analyzed and discussed. It is shown that the existence of an isoscattering (or isosbestic) point observed in pNIPA gels and in some copolymers is related to features observed by Differential Scanning Calorimetry and swelling ratio measurements.

  16. Accurate lineshape spectroscopy and the Boltzmann constant.

    Science.gov (United States)

    Truong, G-W; Anstie, J D; May, E F; Stace, T M; Luiten, A N

    2015-10-14

    Spectroscopy has an illustrious history delivering serendipitous discoveries and providing a stringent testbed for new physical predictions, including applications from trace materials detection, to understanding the atmospheres of stars and planets, and even constraining cosmological models. Reaching fundamental-noise limits permits optimal extraction of spectroscopic information from an absorption measurement. Here, we demonstrate a quantum-limited spectrometer that delivers high-precision measurements of the absorption lineshape. These measurements yield a very accurate measurement of the excited-state (6P1/2) hyperfine splitting in Cs, and reveals a breakdown in the well-known Voigt spectral profile. We develop a theoretical model that accounts for this breakdown, explaining the observations to within the shot-noise limit. Our model enables us to infer the thermal velocity dispersion of the Cs vapour with an uncertainty of 35 p.p.m. within an hour. This allows us to determine a value for Boltzmann's constant with a precision of 6 p.p.m., and an uncertainty of 71 p.p.m.

  17. Defect structure of epitaxial layers of III nitrides as determined by analyzing the shape of X-ray diffraction peaks

    Science.gov (United States)

    Kyutt, R. T.

    2017-04-01

    The shape of X-ray diffraction epitaxial layers with high dislocation densities has been studied experimentally. Measurements with an X-ray diffractometer were performed in double- and triple-crystal setups with both Cu K α and Mo K α radiation. Epitaxial layers (GaN, AlN, AlGaN, ZnO, etc.) with different degrees of structural perfection grown by various methods on sapphire, silicon, and silicon carbide substrates have been examined. The layer thickness varied in the range of 0.5-30 μm. It has been found that the center part of peaks is well approximated by the Voigt function with different Lorentz fractions, while the wing intensity drops faster and may be represented by a power function (with the index that varies from one structure to another). A well-marked dependence on the ordering of dislocations was observed. The drop in intensity in the majority of structures with a regular system and regular threading dislocations was close to the theoretically predicted law Δθ-3; the intensity in films with a chaotic distribution decreased much faster. The dependence of the peak shape on the order of reflection, the diffraction geometry, and the epitaxial layer thickness was also examined.

  18. Suppression of shocked-bubble expansion due to tissue confinement with application to shock-wave lithotripsy.

    Science.gov (United States)

    Freund, Jonathan B

    2008-05-01

    Estimates are made of the effect of tissue confinement on the response of small bubbles subjected to lithotriptor shock pressures. To do this the Rayleigh-Plesset equation, which governs the dynamics of spherical bubbles, is generalized to treat a bubble in a liquid region (blood), which is in turn encased within an elastic membrane (like a vessel's basement membrane), beyond which a Voigt viscoelastic material models the exterior tissue. Material properties are estimated from a range of measurements available for kidneys and similar soft tissues. Special attention is given to the constitutive modeling of the basement membranes because of their expected importance due to their proximity to the bubble and their toughness. It is found that the highest expected values for the elasticity of the membrane and surrounding tissue are insufficient to suppress bubble growth. The reduced confinement of a cylindrical vessel should not alter this conclusion. Tissue viscosities taken from ultrasound measurements suppress bubble growth somewhat, though not to a degree expected to resist injury. However, the higher reported viscosities measured by other means, which are arguably more relevant to the deformations caused by growing bubbles, do indeed significantly suppress bubble expansion.

  19. Numerical modeling of bubble dynamics in viscoelastic media with relaxation

    Science.gov (United States)

    Warnez, M. T.; Johnsen, E.

    2015-06-01

    Cavitation occurs in a variety of non-Newtonian fluids and viscoelastic materials. The large-amplitude volumetric oscillations of cavitation bubbles give rise to high temperatures and pressures at collapse, as well as induce large and rapid deformation of the surroundings. In this work, we develop a comprehensive numerical framework for spherical bubble dynamics in isotropic media obeying a wide range of viscoelastic constitutive relationships. Our numerical approach solves the compressible Keller-Miksis equation with full thermal effects (inside and outside the bubble) when coupled to a highly generalized constitutive relationship (which allows Newtonian, Kelvin-Voigt, Zener, linear Maxwell, upper-convected Maxwell, Jeffreys, Oldroyd-B, Giesekus, and Phan-Thien-Tanner models). For the latter two models, partial differential equations (PDEs) must be solved in the surrounding medium; for the remaining models, we show that the PDEs can be reduced to ordinary differential equations. To solve the general constitutive PDEs, we present a Chebyshev spectral collocation method, which is robust even for violent collapse. Combining this numerical approach with theoretical analysis, we simulate bubble dynamics in various viscoelastic media to determine the impact of relaxation time, a constitutive parameter, on the associated physics. Relaxation time is found to increase bubble growth and permit rebounds driven purely by residual stresses in the surroundings. Different regimes of oscillations occur depending on the relaxation time.

  20. Ion-beam modifications of mechanical and dimensional properties of silicon carbide

    Science.gov (United States)

    Costantini, Jean-Marc; Kerbiriou, Xavier; Sauzay, Maxime; Thomé, Lionel

    2012-11-01

    3C-SiC single crystal epitaxial layers, 6H-SiC single crystal plates and α-SiC Hexoloy sinters were irradiated with 4.0 MeV Xe or 4.0 MeV Au ions at room temperature. Mechanical and dimensional evolutions of silicon carbide are studied by means of nano-indentation and step-height measurements which are correlated with Rutherford backscattering spectrometry and channelling (RBS/C) data in single crystals. Irradiation with Xe ions induces a total lattice disorder related to amorphization for a fluence of 1 × 1015 cm-2 in both polytypes. When complete amorphization is reached, around the same values of Young's modulus (˜350 GPa) and Berkovich hardness (˜27 GPa) are found in both polytypes. The out-of-plane expansion increases with irradiation dose and the saturation value measured in the amorphous layer (normalized to the projected range of the ions) is close to 20-25%. Modifications of macroscopic properties are mainly governed by the disordered fraction of the material in a two-step damage process. A similar behaviour of material evolution is found for the cubic and hexagonal polytypes, either in single crystals or sintered polycrystalline samples. Calculations of Young's modulus and volume swelling are carried out using the analytical (Reuss and Voigt) models of homogenization.

  1. Multispectrum Analysis of the Oxygen A-Band

    Energy Technology Data Exchange (ETDEWEB)

    Drouin, Brian J.; Benner, D. Chris; Brown, Linda R.; Cich, Matthew J.; Crawford, Timothy J.; Devi, V. Malathy; Guillaume, Alexander; Hodges, Joseph T.; Mlawer, Eli J.; Robichaud, David J.; Oyafuso, Fabiano; Payne, Vivienne H.; Sung, Keeyoon; Wishnow, Edward H.; Yu, Shanshan

    2017-01-01

    Retrievals of atmospheric composition from near-infrared measurements require measurements of airmass to better than the desired precision of the composition. The oxygen bands are obvious choices to quantify airmass since the mixing ratio of oxygen is fixed over the full range of atmospheric conditions. The OCO-2 mission is currently retrieving carbon dioxide concentration using the oxygen A-band for airmass normalization. The 0.25% accuracy desired for the carbon dioxide concentration has pushed the required state-of-the-art for oxygen spectroscopy. To measure O2 A-band cross-sections with such accuracy through the full range of atmospheric pressure requires a sophisticated line-shape model (Rautian or Speed-Dependent Voigt) with line mixing (LM) and collision induced absorption (CIA). Models of each of these phenomena exist, however, this work presents an integrated self-consistent model developed to ensure the best accuracy. It is also important to consider multiple sources of spectroscopic data for such a study in order to improve the dynamic range of the model and to minimize effects of instrumentation and associated systematic errors. The techniques of Fourier Transform Spectroscopy (FTS) and Cavity Ring-Down Spectroscopy (CRDS) allow complimentary information for such an analysis. We utilize multispectrum fitting software to generate a comprehensive new database with improved accuracy based on these datasets. The extensive information will be made available as a multi-dimensional cross-section (ABSCO) table and the parameterization will be offered for inclusion in the HITRANonline database.

  2. Quantitative Analysis of Spectral Interference of Spontaneous Raman Scattering in High-Pressure Fuel-Rich H2-Air Combustion

    Science.gov (United States)

    Kojima, Jun; Nguyen, Quang-Viet

    2004-01-01

    We present a theoretical study of the spectral interferences in the spontaneous Raman scattering spectra of major combustion products in 30-atm fuel-rich hydrogen-air flames. An effective methodology is introduced to choose an appropriate line-shape model for simulating Raman spectra in high-pressure combustion environments. The Voigt profile with the additive approximation assumption was found to provide a reasonable model of the spectral line shape for the present analysis. The rotational/vibrational Raman spectra of H2, N2, and H2O were calculated using an anharmonic-oscillator model using the latest collisional broadening coefficients. The calculated spectra were validated with data obtained in a 10-atm fuel-rich H2-air flame and showed excellent agreement. Our quantitative spectral analysis for equivalence ratios ranging from 1.5 to 5.0 revealed substantial amounts of spectral cross-talk between the rotational H2 lines and the N2 O-/Q-branch; and between the vibrational H2O(0,3) line and the vibrational H2O spectrum. We also address the temperature dependence of the spectral cross-talk and extend our analysis to include a cross-talk compensation technique that removes the nterference arising from the H2 Raman spectra onto the N2, or H2O spectra.

  3. Carbohydrate-Derived Amphiphilic Macromolecules: A Biophysical Structural Characterization and Analysis of Binding Behaviors to Model Membranes

    Science.gov (United States)

    Martin, Adriana A. T.; Tomasini, Michael; Kholodovych, Vladyslav; Gu, Li; Sommerfeld, Sven Daniel; Uhrich, Kathryn E.; Murthy, N. Sanjeeva; Welsh, William J.; Moghe, Prabhas V.

    2015-01-01

    The design and synthesis of enhanced membrane-intercalating biomaterials for drug delivery or vascular membrane targeting is currently challenged by the lack of screening and prediction tools. The present work demonstrates the generation of a Quantitative Structural Activity Relationship model (QSAR) to make a priori predictions. Amphiphilic macromolecules (AMs) “stealth lipids” built on aldaric and uronic acids frameworks attached to poly(ethylene glycol) (PEG) polymer tails were developed to form self-assembling micelles. In the present study, a defined set of novel AM structures were investigated in terms of their binding to lipid membrane bilayers using Quartz Crystal Microbalance with Dissipation (QCM-D) experiments coupled with computational coarse-grained molecular dynamics (CG MD) and all-atom MD (AA MD) simulations. The CG MD simulations capture the insertion dynamics of the AM lipophilic backbones into the lipid bilayer with the PEGylated tail directed into bulk water. QCM-D measurements with Voigt viscoelastic model analysis enabled the quantitation of the mass gain and rate of interaction between the AM and the lipid bilayer surface. Thus, this study yielded insights about variations in the functional activity of AM materials with minute compositional or stereochemical differences based on membrane binding, which has translational potential for transplanting these materials in vivo. More broadly, it demonstrates an integrated computational-experimental approach, which can offer a promising strategy for the in silico design and screening of therapeutic candidate materials. PMID:25855953

  4. Prediction study of the elastic and thermodynamic properties of the newly discovered tetragonal SrPd 2Ge 2 phase

    Science.gov (United States)

    Ghebouli, M. A.; Bouhemadou, A.; Ghebouli, B.; Fatmi, M.; Bin-Omran, S.

    2011-07-01

    Density functional theory pseudo-potential plane-wave calculations are performed in order to predict the structural, elastic and thermodynamic properties of the newly discovered tetragonal intermetallic SrPd 2Ge 2. The computed equilibrium lattice constants and the internal parameter are in good agreement with the experimental findings. The effect of high pressure, up to 40 GPa, on the lattice constants shows that the contraction along the c axis is higher than along the a axis. The single-crystal elastic constants and related properties are calculated using the static finite strain technique. We predicted the bulk modulus, shear modulus, Young's modulus and Poisson's ratio for ideal polycrystalline SrPd 2Ge 2 aggregates, using the Voigt-Reuss-Hill approximations. We estimated the Debye temperature and minimum thermal conductivity of SrPd 2Ge 2 from the average sound velocity. Through the quasi-harmonic Debye model, in which the phononic effects are considered, the temperature and pressure effects on the primitive cell volume, bulk modulus, thermal expansion coefficient, heat capacity and Debye temperature are investigated. This is the first quantitative theoretical prediction of the elastic and thermodynamic properties of the SrPd 2Ge 2 compound, and it still awaits experimental confirmation.

  5. Fractional characteristic times and dissipated energy in fractional linear viscoelasticity

    Science.gov (United States)

    Colinas-Armijo, Natalia; Di Paola, Mario; Pinnola, Francesco P.

    2016-08-01

    In fractional viscoelasticity the stress-strain relation is a differential equation with non-integer operators (derivative or integral). Such constitutive law is able to describe the mechanical behavior of several materials, but when fractional operators appear, the elastic and the viscous contribution are inseparable and the characteristic times (relaxation and retardation time) cannot be defined. This paper aims to provide an approach to separate the elastic and the viscous phase in the fractional stress-strain relation with the aid of an equivalent classical model (Kelvin-Voigt or Maxwell). For such equivalent model the parameters are selected by an optimization procedure. Once the parameters of the equivalent model are defined, characteristic times of fractional viscoelasticity are readily defined as ratio between viscosity and stiffness. In the numerical applications, three kinds of different excitations are considered, that is, harmonic, periodic, and pseudo-stochastic. It is shown that, for any periodic excitation, the equivalent models have some important features: (i) the dissipated energy per cycle at steady-state coincides with the Staverman-Schwarzl formulation of the fractional model, (ii) the elastic and the viscous coefficients of the equivalent model are strictly related to the storage and the loss modulus, respectively.

  6. Sparse Representation of Photometric Redshift PDFs: Preparing for Petascale Astronomy

    CERN Document Server

    Kind, M Carrasco

    2014-01-01

    One of the consequences of entering the era of precision cosmology is the widespread adoption of photometric redshift probability density functions (PDFs). Both current and future photometric surveys are expected to obtain images of billions of distinct galaxies. As a result, storing and analyzing all of these PDFs will be non-trivial and even more severe if a survey plans to compute and store multiple different PDFs. In this paper we propose the use of a sparse basis representation to fully represent individual photo-$z$ PDFs. By using an Orthogonal Matching Pursuit algorithm and a combination of Gaussian and Voigt basis functions, we demonstrate how our approach is superior to a multi-Gaussian fitting, as we require approximately half of the parameters for the same fitting accuracy with the additional advantage that an entire PDF can be stored by using a 4-byte integer per basis function, and we can achieve better accuracy by increasing the number of bases. By using data from the CFHTLenS, we demonstrate th...

  7. ELASTIC PROPERTIES OF SILICA POLYMORPHS – A REVIEW

    Directory of Open Access Journals (Sweden)

    Pabst W.

    2013-09-01

    Full Text Available The elastic properties of silica phases are reviewed. Available monocrystal data for crystalline SiO2 polymorphs (low-quartz, high-quartz, low-cristobalite, high-cristobalite, stishovite are collected from the literature, and effective elastic constants (Young’s moduli, shear moduli, bulk moduli and Poisson ratios are calculated from these using Voigt-Reuss-Hill averaging. Both experimental data and simulation results are taken into account. A table of room temperature elastic constants for crystalline silica polymorphs and silica glass is given that lists the recommended current “state-of-the-art“ values. All data are consistent with the well-known auxetic behavior of cristobalite at room temperature, and high-temperature simulation data published for cristobalite confirm auxetic behavior for all temperatures from room temperature up to more than 1500°C. The calculations of this paper show that also quartz can be auxetic, but only in a very limited temperature range around the low-to-high-quartz transition temperature (420 – 577°C. Experimental measurements of elastic properties of tridymite and cristobalite, including high-temperature measurements, are identified as a desideratum of future research.

  8. Wave propagation analysis of edge cracked circular beams under impact force.

    Directory of Open Access Journals (Sweden)

    Şeref Doğuşcan Akbaş

    Full Text Available This paper presents responses of an edge circular cantilever beam under the effect of an impact force. The beam is excited by a transverse triangular force impulse modulated by a harmonic motion. The Kelvin-Voigt model for the material of the beam is used. The cracked beam is modelled as an assembly of two sub-beams connected through a massless elastic rotational spring. The considered problem is investigated within the Bernoulli-Euler beam theory by using energy based finite element method. The system of equations of motion is derived by using Lagrange's equations. The obtained system of linear differential equations is reduced to a linear algebraic equation system and solved in the time domain by using Newmark average acceleration method. In the study, the effects of the location of crack, the depth of the crack, on the characteristics of the reflected waves are investigated in detail. Also, the positions of the cracks are calculated by using reflected waves.

  9. Residual elastic strain measurement in heat-treated and/or plastically deformed two-phase stainless steel by neutron diffraction

    Energy Technology Data Exchange (ETDEWEB)

    Harjo, S.; Sato, Hideo; Tomota, Yo [Ibaraki Univ., Hitachi (Japan). Faculty of Engineering; Ono, Masayoshi

    1997-06-01

    The testing method of microscopic residual stress in commercial material using neutral diffraction is not established yet like that using x-ray diffraction. Then, in this research a microscopic residual stress of {alpha}/{gamma} two phase Fe-Cr-Ni alloy convenient for an experiment was tried by using neutron diffraction, to investigate its testing method. And further, a test using x-ray diffraction was also conducted for their comparison. As a result, some problems in the residual stress measurement using neutron diffraction were summarized shown as follows. On precision of d{sub 0}, since proper reference material was difficult for material M to provide, a preferable result could not be obtained in the stress measurement using PSD method. On curve fitting, by changing from a multi order function to a Voigt function by using the curve-fitting method, it was found that the peak could be fit better. Furthermore, on the problem of testing condition, because of weak intensity of the neutron source, it was necessary to use a monochromator capable of collecting incident beam like Bent crystal, and to improve sample setting, counter and slit. (G.K.)

  10. First line shape analysis and spectroscopic parameters for the ν11 band of 12C2H4

    KAUST Repository

    Es-sebbar, Et-touhami

    2016-08-11

    An accurate knowledge of line intensities, collisional broadening coefficients and narrowing parameters is necessary for the interpretation of high-resolution infrared spectra of the Earth and other planetary atmospheres. One of the most promising spectral domains for (C2H4)-C-12 monitoring in such environments is located near the 336 gm window, through its v(11) C-H stretching mode. In this paper, we report an extensive study in which we precisely determine spectroscopic parameters of (C2H4)-C-12 v(11) band at 297 +/- 1 K, using a narrow Difference-Frequency-Generation (DFG) laser with 10(-4) cm(-1) resolution. Absorption measurements were performed in the 2975-2980 cm(-1) spectral window to investigate 32 lines corresponding to where, J\\'ka\\',kc\\'<- Jka,kc, 5 <= J <= 7; 0.5 <= K-a <= 6 and 1 <= K-c <= 14. Spectroscopic parameters are retrieved using either Voigt or appropriate Galatry profile to simulate the measured (C2H4)-C-12 line shape. Line intensities along with self-broadening coefficients are reported for all lines. Narrowing coefficients for each isolated line are also derived. To our knowledge, the current study reports the first extensive spectroscopic parameter measurements of the (C2H4)-C-12 v(11) band in the 2975-2980 cm(-1) range. (C) 2016 Elsevier Ltd. All rights reserved.

  11. Measurements of NH3 linestrengths and collisional broadening coefficients in N2, O2, CO2, and H2O near 1103.46cm-1

    KAUST Repository

    Owen, Kyle

    2013-05-01

    Laser-based ammonia gas sensors have useful applications in many fields including combustion, atmospheric monitoring, and medical diagnostics. Calibration-free trace gas sensors require the spectroscopic parameters including linestrengths and collisional broadening coefficients to be known. Ammonia\\'s strong ν2 vibrational band between 9 - 12 μm has the high absorption strength needed for sensing small concentrations. Within this band, the 1103.46cm-1 feature is one of the strongest and has minimal interference from CO2 and H2O. However, the six rotational transitions that make up this feature have not been studied previously with absorption spectroscopy due to their small line spacing ranging from 0.004 to 0.029cm-1. A tunable quantum cascade laser was used to accurately study these six transitions. A retrieval program was used to determine the linestrengths and collisional broadening coefficients based on Voigt and Galatry profiles. The experiments were performed with ammonia mixtures in nitrogen, oxygen, water vapor, and carbon dioxide at room temperature in an optical cell. These data are going to aid in the development of quantitative ammonia sensors utilizing this strong absorption feature. © 2013 Elsevier Ltd.

  12. Longitudinal vibration of pile in layered soil based on Rayleigh-Love rod theory and fictitious soil-pile model

    Institute of Scientific and Technical Information of China (English)

    Lü Shu-hui; WANG Kui-hua; WU Wen-bing; C. J. LEO

    2015-01-01

    The dynamic response of pile in layered soil is theoretically investigated when considering the transverse inertia effect. Firstly, the fictitious soil-pile model is employed to simulate the dynamic interaction between the pile and the soil layers beneath pile toe. The dynamic interactions of adjacent soil layers along the vertical direction are simplified as distributed Voigt models. Meanwhile, the pile and fictitious soil-pile are assumed to be viscoelastic Rayleigh-Love rods, and both the radial and vertical displacement continuity conditions at the soil-pile interface are taken into consideration. On this basis, the analytical solution for dynamic response at the pile head is derived in the frequency domain and the corresponding quasi-analytical solution in the time domain is then obtained by means of the convolution theorem. Following this, the accuracy and parameter value of the hypothetical boundaries for soil-layer interfaces are discussed. Comparisons with published solution and measured data are carried out to verify the rationality of the present solution. Parametric analyses are further conducted by using the present solution to investigate the relationships between the transverse inertia effects and soil-pile parameters.

  13. Performance of viscoelastic dampers (VED) under various temperatures and application of magnetorheological dampers (MRD) for seismic control of structures

    Science.gov (United States)

    Bhatti, Abdul Qadir

    2013-08-01

    A number of studies have been carried out to investigate the performance of viscoelastic dampers (VEDs) and magnetorheological dampers (MRDs) in controlling the seismic response of buildings, but very few of them regarding the effect of temperature on the behavior of those dampers. The energy absorption properties of the VEDs are dependent on the ambient temperature, excitation frequency and strain amplitude. Several mathematical models have been investigated for reproducing the experimental behavior of single degree of freedom VEDs and MEDs. Of these, only the fractional derivative model can reflect the influence of temperature which is, however, so complex that it is difficult to apply in structural analysis. In order to verify the effect of temperature, two case studies of structural element have been conducted: once using VED and once using MRD. Kelvin-Voigt mathematical model applied, they were investigated and after analyzing the results, the force vs. displacement showed that MRD achieved a high force capacity and a better performance than VED. Furthermore, the effect of the temperature in case of VED observed via plotting the dissipated energy hysteresis at different temperatures. These results validate the effect of the temperature as the lower the temperature the more viscous the dashpot element becomes, hence improving damping, but this is up to a specific low temperature.

  14. Electromechanical Impedance Response of a Cracked Timoshenko Beam

    Directory of Open Access Journals (Sweden)

    Cuiqin Wu

    2011-07-01

    Full Text Available Typically, the Electromechanical Impedance (EMI technique does not use an analytical model for basic damage identification. However, an accurate model is necessary for getting more information about any damage. In this paper, an EMI model is presented for predicting the electromechanical impedance of a cracked beam structure quantitatively. A coupled system of a cracked Timoshenko beam with a pair of PZT patches bonded on the top and bottom surfaces has been considered, where the bonding layers are assumed as a Kelvin-Voigt material. The shear lag model is introduced to describe the load transfer between the PZT patches and the beam structure. The beam crack is simulated as a massless torsional spring; the dynamic equations of the coupled system are derived, which include the crack information and the inertial forces of both PZT patches and adhesive layers. According to the boundary conditions and continuity conditions, the analytical expression of the admittance of PZT patch is obtained. In the case study, the influences of crack and the inertial forces of PZT patches are analyzed. The results show that: (1 the inertial forces affects significantly in high frequency band; and (2 the use of appropriate frequency range can improve the accuracy of damage identification.

  15. Recommended isolated-line profile for representing high-resolution spectroscopic transitions (IUPAC Technical Report)

    CERN Document Server

    Tennyson, Jonathan; Campargue, Alain; Csaszar, Attila G; Daumont, Ludovic; Gamache, Robert R; Hodges, Joseph T; Lisak, Daniel; Naumenko, Olga V; Rothman, Laurence S; Tran, Ha; Zobov, Nikolai F; Buldyreva, Jeanna; Boone, Chris D; De Vizia, Maria Domenica; Gianfrani, Livio; Hartmann, Jean-Michel; McPheat, Robert; Murray, Jonathan; Ngo, Ngoc Hoa; Polyansky, Oleg L; Weidmann, Damien

    2014-01-01

    The report of an IUPAC Task Group, formed in 2011 on "Intensities and line shapes in high-resolution spectra of water isotopologues from experiment and theory" (Project No. 2011-022-2-100), on line profiles of isolated high-resolution rotational-vibrational transitions perturbed by neutral gas-phase molecules is presented. The well-documented inadequacies of the Voigt profile (VP), used almost universally by databases and radiative-transfer codes, to represent pressure effects and Doppler broadening in isolated vibrational-rotational and pure rotational transitions of the water molecule have resulted in the development of a variety of alternative line-profile models. These models capture more of the physics of the influence of pressure on line shapes but, in general, at the price of greater complexity. The Task Group recommends that the partially Correlated quadratic-Speed-Dependent Hard-Collision profile should be adopted as the appropriate model for high-resolution spectroscopy. For simplicity this should b...

  16. Ab initio study of mechanical and thermo-acoustic properties of tough ceramics: applications to HfO{sub 2} in its cubic and orthorhombic phase

    Energy Technology Data Exchange (ETDEWEB)

    Ponce, C A [Departamento de Fisica, Facultad de Ciencias Exactas, y Naturales y Agrimensura, UNNE, Campus Universitario, Avenida Libertad 5600, CP 3400, Corrientes (Argentina); Casali, R A [Departamento de Fisica, Facultad de Ciencias Exactas, y Naturales y Agrimensura, UNNE, Campus Universitario, Avenida Libertad 5600, CP 3400, Corrientes (Argentina); Caravaca, M A [Departamento de Fisico, Quimica, Facultad de Ingenieria, UNNE, Avenida Las Heras 727, CP 3500, Resistencia (Argentina)

    2008-01-30

    By means of the ab initio all-electron new full-potential linear-muffin-tin orbitals method, calculations were made for elastic constants C{sub 11}, C{sub 12} and C{sub 44} for Si, ZrO{sub 2} and HfO{sub 2} in their cubic phase, and constants C{sub 11}, C{sub 22}, C{sub 33}, C{sub 12}, C{sub 13}, C{sub 23}, C{sub 44}, C{sub 55} and C{sub 66} for HfO{sub 2} in its orthorhombic phase. Using the Voigt and Reuss theory, estimations were made for polycrystals of their bulk, shear and Young moduli, and Poisson coefficients. The speed of elastic wave propagations and Debye temperatures were estimated for polycrystals built from Si and the above mentioned compounds. The semicore 4f{sup 14} electrons should be included in the valence set of Hf atom in this all-electron approach if accurate results for elastic properties under pressures are looked for.

  17. A systematic muscle model covering regions from the fast ramp stretches in the muscle fibres to the relatively slow stretches in the human triceps surae.

    Science.gov (United States)

    Tamura, Youjiro; Ito, Akira; Cresswell, Andrew G

    2015-01-01

    We have proposed a muscle model which consists of two Maxwell elements and a Voigt element in parallel. The muscle model was applied on the experiment of the force responses by the fast ramp stretch in muscle fibres to determine the mechanical parameters. In the simulation, the Maxwell element with a flexible spring and a long relaxation time seemed to correspond with the force-generating state of the cross-bridges. Next, we tried the muscle model to simulate the relatively slow movement. Experimentally, we have measured torque changes by the stretch responses in the human triceps surae. In the experiments, the derivation of torque by rotation angle showed two peaks P1 and P2. The first peak P1 originated from the elastic properties of engaged cross-bridges, while the second peak P2 was due to stretch reflex signals. The model of a single-joint system simulated well with the experimental results to show a good adaptability of the muscle model.

  18. Insight into structural, mechanical, electronic and thermodynamic properties of intermetallic phases in Zr-Sn system from first-principles calculations

    Science.gov (United States)

    Liu, Shuai; Zhan, Yongzhong; Wu, Junyan; Wei, Xuanchen

    2015-11-01

    The structural, phase stabilities, mechanical, electronic and thermodynamic properties of intermetallic phases in Zr-Sn system are investigated by using first-principles method. The equilibrium lattice constants, enthalpy of formation (ΔHform) and elastic constants are obtained and compared with available experimental and theoretical data. The configuration of Zr4Sn is measured with reasonable precision. The ΔHform of five hypothetical structures are obtained in order to find possible metastable phase for Zr-Sn system. The mechanical properties, including bulk modulus, shear modulus, Young's modulus and Poisson's ratio, are calculated by Voigt-Reuss-Hill approximation and the Zr5Sn4 and Zr5Sn3 show excellent mechanical properties. The electronic density of states for Zr5Sn4, Zr5Sn3 and cP8-Zr3Sn are calculated to further investigate the stability of intermetallic compounds. Through the quasi-harmonic Debye model, the Debye temperature, heat capacity and thermal expansion coefficient under temperature of 0-300 K and pressure of 0-50 GPa for Zr5Sn3 and Zr5Sn4 are deeply investigated.

  19. A first-principles study on structural stability and mechanical properties of polar intermetallic phases CaZn2 and SrZn2

    Science.gov (United States)

    Hu, Wen-Cheng; Liu, Yong; Li, De-Jiang; Li, Ke; Jin, Hua-Lan; Xu, Ying-Xuan; Xu, Chun-Shui; Zeng, Xiao-Qin

    2014-12-01

    Structural stability and electronic properties of polar intermetallic CaZn2 and SrZn2 in both CeCu2-type and MgZn2-type structures have been investigated using first-principles method. The calculated equilibrium lattice parameters agree closely with the available experimental and other theoretical results. In terms of formation enthalpy, it is discovered that the present compounds with CeCu2-type structure are energetically more stable than that with MgZn2-type. They are all mechanically stable according to the criteria of elastic stability. In particular, we have investigated the pressure effect on the compressive behaviour and structural stability of each compound. Subsequently, the bulk modulus, shear modulus, Young's modulus, theoretical hardness, Poisson's ratio and Debye temperature in the ground state can be estimated using Voigt-Reuss-Hill homogenization method. Mechanical anisotropy is characterized by the anisotropic factors and direction-dependent Young's modulus. Finally, the electronic structures are determined to reveal the bonding characteristics of considered phases.

  20. Connecting the grain-shearing mechanism of wave propagation in marine sediments to fractional order wave equations.

    Science.gov (United States)

    Pandey, Vikash; Holm, Sverre

    2016-12-01

    The characteristic time-dependent viscosity of the intergranular pore-fluid in Buckingham's grain-shearing (GS) model [Buckingham, J. Acoust. Soc. Am. 108, 2796-2815 (2000)] is identified as the property of rheopecty. The property corresponds to a rare type of a non-Newtonian fluid in rheology which has largely remained unexplored. The material impulse response function from the GS model is found to be similar to the power-law memory kernel which is inherent in the framework of fractional calculus. The compressional wave equation and the shear wave equation derived from the GS model are shown to take the form of the Kelvin-Voigt fractional-derivative wave equation and the fractional diffusion-wave equation, respectively. Therefore, an analogy is drawn between the dispersion relations obtained from the fractional framework and those from the GS model to establish the equivalence of the respective wave equations. Further, a physical interpretation of the characteristic fractional order present in the wave equations is inferred from the GS model. The overall goal is to show that fractional calculus is not just a mathematical framework which can be used to curve-fit the complex behavior of materials. Rather, it can also be derived from real physical processes as illustrated in this work by the example of GS.