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Academic literature on the topic 'Relativistic shift'

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Published: 4 June 2021
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Journal articles on the topic "Relativistic shift"

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Krizan, John E. "Relativistic Doppler-shift effects." Physical Review D 31, no. 12 (June 15, 1985): 3140–43. http://dx.doi.org/10.1103/physrevd.31.3140.

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Hinterbichler, Kurt, and Austin Joyce. "Goldstones with extended shift symmetries." International Journal of Modern Physics D 23, no. 13 (November 2014): 1443001. http://dx.doi.org/10.1142/s0218271814430019.

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We consider scalar field theories invariant under extended shift symmetries consisting of higher order polynomials in the spacetime coordinates. These generalize ordinary shift symmetries and the linear shift symmetries of the galileons. We find Wess–Zumino Lagrangians which transform up to total derivatives under these symmetries, and which possess fewer derivatives per field and lower order equations of motion than the strictly invariant terms. In the nonrelativistic context, where the extended shifts are purely spatial, these theories may describe multi-critical Goldstone bosons. In the relativistic case, where the shifts involve the full spacetime coordinate, these theories generally propagate extra ghostly degrees of freedom.
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Naqvi, S. A., G. S. Kerslick, J. A. Nation, and L. Schächter. "Resonance shift in relativistic traveling wave amplifiers." Physical Review E 53, no. 4 (April 1, 1996): 4229–31. http://dx.doi.org/10.1103/physreve.53.4229.

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Arshansky, R., and L. P. Horwitz. "Relativistic potential scattering and phase shift analysis." Journal of Mathematical Physics 30, no. 1 (January 1989): 213–18. http://dx.doi.org/10.1063/1.528572.

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Savchenko, O. Ya. "Relativistic shift of the linear Zeeman effect." Optics and Spectroscopy 101, no. 2 (August 2006): 179–82. http://dx.doi.org/10.1134/s0030400x06080029.

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Hara, Nodoka, Andrea Di Di Cicco, Georghii Tchoudinov, Keisuke Hatada, and Calogero Renzo Natoli. "Relativistic Corrections to Phase Shift Calculation in the GNXAS Package." Symmetry 13, no. 6 (June 6, 2021): 1021. http://dx.doi.org/10.3390/sym13061021.

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Modern XAFS (X-ray Absorption Fine Structure) data-analysis is based on accurate multiple-scattering (MS) calculations of the x-ray absorption cross-section. In this paper, we present the inclusion and test of relativistic corrections for the multiple-scattering calculations within the GnXAS suite of programs, which is relevant to the treatment of the XAFS signals when atoms with high atomic number are contained into the system. We present a suitable strategy for introducing relativistic corrections without altering the basic structure of the programs. In particular, this is realized by modifying only the Phagen program calculating the atomic absorption cross sections and scattering t-matrices for the selected cluster. The modification incorporates a pseudo-Schrödinger Equation (SE) replacing the Dirac relativistic form. The phase-shift calculations have been put to a test in two known molecular and crystalline cases: molecular bromine Br2 and crystalline Pb. Calculations in an extended energy range have been shown to be very close to the non-relativistic case for Br2 (Br K-edge) while corrections have been found to exceed 25% for amplitude and phases of the XAFS multiple-scattering signals (Pb L3-edge). Benefits in the structural refinement using relativistic corrections are discussed for crystalline Pb at room temperature.
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Vícha, Jan, Jan Novotný, Michal Straka, Michal Repisky, Kenneth Ruud, Stanislav Komorovsky, and Radek Marek. "Structure, solvent, and relativistic effects on the NMR chemical shifts in square-planar transition-metal complexes: assessment of DFT approaches." Physical Chemistry Chemical Physics 17, no. 38 (2015): 24944–55. http://dx.doi.org/10.1039/c5cp04214c.

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Boudet, Roger. "On the relativistic calculation of the Lamb shift." Banach Center Publications 37, no. 1 (1996): 337–42. http://dx.doi.org/10.4064/-37-1-337-342.

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Jönsson, P., and C. Froese Fischer. "SMS92: a program for relativistic isotope shift calculations." Computer Physics Communications 100, no. 1-2 (February 1997): 81–92. http://dx.doi.org/10.1016/s0010-4655(96)00118-x.

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Sazhin, M. V., I. Yu Vlasov, O. S. Sazhina, and V. G. Turyshev. "RadioAstron: relativistic frequency change and time-scale shift." Astronomy Reports 54, no. 11 (November 2010): 959–73. http://dx.doi.org/10.1134/s1063772910110016.

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Dissertations / Theses on the topic "Relativistic shift"

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Berengut, Julian Carlo Physics Faculty of Science UNSW. "Isotope shift and relativistic shift in atomic spectra." Awarded by:University of New South Wales. Physics, 2006. http://handle.unsw.edu.au/1959.4/23900.

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At present several groups are analysing quasar absorption spectra to search for variation of the fine structure constant, alpha, across space and time. These studies compare the wavelengths of several transitions observed in the absorption clouds with those seen in the laboratory, and interpret anomalies as variation in alpha. One group has already presented evidence that alpha may have been smaller at an early epoch. Other groups using different telescopes see no variation. These studies use the ???many-multiplet??? method, which relies on the utilisation of many transitions in many ions to enhance the size of the effects and remove sources of systematic error. While this method offers an order-of-magnitude improvement in sensitivity over the previously used alkali-doublet method, the alpha-dependence (relativistic shift) of every transition used in the analysis must be calculated ab initio. In this thesis we present a method for the precise calculation of relativistic shifts, based on an energy calculation involving combination of the configuration interaction method and many-body perturbation theory. The many-multiplet method also introduces a potential systematic error: if the relative isotope abundances of the absorbers differ from terrestrial abundances then there can be spurious shifts in the measured wavelengths, which may be incorrectly interpreted as variation of alpha. A ???conspiracy??? of several isotopic abundances may provide an alternative explanation for the observed spectral anomalies. To account for these systematic errors we need accurate values of the isotope shift. We calculate these shifts using the finite-field method to reduce the problem to that of an energy calculation, which in turn is done using the same method used for the relativistic shift. We present the results of our calculations for a variety of atoms and ions seen in quasar absorption spectra. The results of this research should allow astrophysicists to measure isotope abundances in the absorbers directly. This can provide a test for models of nuclear reactions in stars and supernovae, and of the chemical evolution of the Universe. Our calculations can also be used in conjunction with measurements to extract changes in nuclear charge radii between isotopes.
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Nazé, Cédric. "Relativistic ab initio calculations of isotope shifts." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209637.

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Quand les effets de la masse finie du noyau et de la distribution de charge spatiale sont pris en compte dans l’Hamiltonien décrivant un système atomique, les isotopes d’un élément, caractérisés par le même nombre de protons mais un nombre différent de neutrons, ont des niveaux d’énergie électronique différents. Le déplacement entre les niveaux d’énergie (pour un même état quantique) de deux isotopes différents est appelé le déplacement isotopique de niveau. De manière générale, on peut distinguer les déplacements isotopiques de champ (field shift) et les déplacements isotopiques de masse (mass shift). Pour les systèmes à plus d’un électron, le specific mass shift (SMS) apparaît. Grâce à sa faible pondération, le paramètre SMS peut être traité comme une perturbation de l’Hamiltonien ;son estimation fait appel aux intégrales de Vinti [5].

Dans un contexte relativiste, les programmes grasp2K [2] et mcdf-gme [1] permettent de résoudre les équations de Dirac-Fock associées à un état multiconfigurationnel et d’en fournir l’énergie ainsi que la représentation numérique des orbitales monoélectroniques. Nous avons créé et introduit dans le programme mcdf-gme une sous-routine capable d’estimer les paramètres de masse et de champ à partir des fonctions d’onde multiconfigurationnelles. Pour le programme GRASP2K, un module indépendant à été créé.

Par ailleurs, un opérateur plus complet impliquant des corrections en αZ, a été dérivé par Shabaev [4] et, de manière indépendante, par Palmer [3]. Nous avons déduit la forme tensorielle de cet opérateur et avons également implémenté dans les programmes cités ci-dessus le calcul de ses éléments de matrice.

Grâce à ces outils nous avons pu étudier la détérioration de l’opérateur d’énergie cinétique pour estimer le normal mass shift et travailler divers systèmes comme le lithium neutre et sa séquence isoélectronique. Par la suite nous avons également travaillé sur les séquences isoélectroniques du bore, du béryllium, du carbone et de l’azote. Enfin, certains effets isotopiques ont été étudiés pour plusieurs transitions dans le baryum neutre.

Bibliographie

[1] J. P. Desclaux. A relativistic multiconfiguration Dirac-Fock package. In E. Clementi, editor, Methods and Techniques in Computational Chemistry - vol. A :Small Systems of METTEC, page 253. STEF, Cagliari, 1993.

[2] P. Jönsson, X. He, C. Froese Fischer and I. P. Grant. The GRASP2K relativistic atomic structure package. Comput. Phys. Commun. 177 :597–622, 2007.

[3] C. W. P. Palmer. Reformulation of the theory of the mass shift. J. Phys. B :At. Mol. Phys. 20 :5987–5996, 1987.

[4] V. M. Shabaev and A. N. Artemyev. Relativistic nuclear recoil corrections to the energy levels of multicharged ions. J. Phys. B :At. Mol. Phys. 27 :1307–1314, 1994.

[5] J. P. Vinti. Isotope shift in magnesium. Phys. Rev. 56 :1120–1132, 1939.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished

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Barakat, Khaldoon A. "Modeling the chemical and photophysical properties of gold complexes." Thesis, University of North Texas, 2004. https://digital.library.unt.edu/ark:/67531/metadc4640/.

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Various gold complexes were computationally investigated, to probe their photophysical, geometric, and bonding properties. The geometry of AuI complexes (ground state singlet) is very sensitive to the electronic nature of the ligands: σ-donors gave a two-coordinate, linear shape; however, σ-acceptors yielded a three-coordinate, trigonal planar geometry. Doublet AuIIL3 complexes distort to T-shape, and are thus ground state models of the corresponding triplet AuIL3. The disproportionation of AuIIL3 to AuIL3 and AuIIIL3 is endothermic for all ligands investigated, however, σ-donors are better experimental targets for AuII complexes. For dimeric AuI complexes, only one gold center in the optimized triplet exciton displays a Jahn-Teller distortion, and the Au---Au distance is reduced versus the ground state distance (i.e., two reasons for large Stokes' shifts).
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Beerwerth, Randolf [Verfasser], Stephan [Gutachter] Fritzsche, J. Gutachter] Bieron, and Tomas [Gutachter] [Brage. "Electron correlation in relativistic multiconfiguration calculations of isotope shift parameters, hyperfine coupling constants and atomic processes / Randolf Beerwerth ; Gutachter: Stephan Fritzsche, J. Bieron, Tomas Brage." Jena : Friedrich-Schiller-Universität Jena, 2019. http://d-nb.info/1206542586/34.

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Filippin, Livio. "Relativistic study of electron correlation effects on polarizabilities, two-photon decay rates, and electronic isotope-shift factors in atoms and ions: ab initio and semi-empirical approaches." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/261670.

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The first aim of this thesis is to perform relativistic calculation of atomic and ionic polarizabilities and two-photon decay rates. Hydrogenic systems are treated by the Lagrange-mesh method. The extension to alkali-like systems is realized by means of a semiempirical-core-potential approach combined with the Lagrange-mesh method. The studied systems are partitioned into frozen-core electrons and an active valence electron. The core orbitals are defined by a Dirac-Hartree-Fock (DHF) calculation using the GRASP2K package. The valence electron is described by a Dirac-like Hamiltonian involving a core-polarization potential to simulate the core-valence electron correlation. Polarizabilities appear in a large number of fields and applications, namely in cold atoms physics, metrology and chemical physics. Two-photon transitions are part of a priori highly unlikely processes and are therefore called forbidden radiative processes. Experimental situations report decays from metastable excited states through these channels. Long lifetimes were measured for highly charged Be-like ions in recent storage-ring experiments, but their interpretation is problematic. The study of the competition between forbidden (one-photon beyond the dipole approximation, or multi-photon) and unexpected (hyperfine-induced or induced by external magnetic fields) radiative processes is all obviously relevant. The second aim of this thesis is to perform relativistic ab initio calculations of electronic isotope-shift (IS) factors by using the multiconfiguration DHF (MCDHF) method implemented in the RIS3/GRASP2K and RATIP program packages. Using the MCDHF method, two different approaches are adopted for the computation of electronic IS factors for a set of transitions between low-lying levels of neutral systems. The first one is based on the estimate of the expectation values of the one- and two-body nuclear recoil Hamiltonian for a given isotope, including relativistic corrections derived by Shabaev, combined with the calculation of the total electron densities at the origin. In the second approach, the relevant electronic factors are extracted from the calculated transition shifts for given triads of isotopes. These electronic quantities together with observed ISs between different pairs of isotopes provide the changes in mean-square charge radii of the atomic nuclei. Within this computational approach for the estimation of the mass- and field-shift factors, different models for electron correlation are explored in a systematic way to determine a reliable computational strategy, and to estimate theoretical error bars of the IS factors.
Doctorat en Sciences de l'ingénieur et technologie
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Machado, Jorge Felizardo Dias Cunha. "High precision tests of QED : measurement of the alpha-particle and helion rms charge radius and the transition energies in highly-charged ions." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS016/document.

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Ce travail vise à contribuer à l’amélioration de notre connaissance de l’électrodynamique quantique des états liés, par des mesures de haute précision dans des états exotiques de la matière. Bien que notre connaissance de l’électrodynamique quantique des états liés et du problème relativiste à plusieurs corps aient fait des progrès importants ces dernières années, il reste des questions fondamentales dont la résolution nécessite d’augmenter le nombre et la précision des tests expérimentaux. La première partie de ce travail a été réalisée dans le cadre de l’expérience récente sur les ions muoniques d’hélium (μ4He+ et μ3He+) conduite par la collaboration CREMA. Cette expérience vise à fournir de nouvelles valeurs précises pour les rayons de charge moyens des noyaux des isotopes stables de l’hélium. Ces valeurs sont extraites de la mesure du déplacement de Lamb, c’est-à-dire, de la mesure de la différence d’énergie entre les États 2S − 2P. Une mesure des énergies de transition d’une précision d’au moins 50 ppm, permet de déterminer les rayons de charge des noyaux des isotopes d’hélium avec une incertitude de 0,03%, dix fois plus précise que les résultats précédents obtenus à partir de la diffusion d’électrons. La deuxième partie de ce travail a été de réaliser des mesures de haute précision de transitions de rayons X dans des ions fortement chargés, à l’aide d’un spectromètre à double cristal plan. Ces ions étaient produits dans le plasma d’une source d’ions de type ECRIS (electron-cyclotron resonance ion source). Le spectromètre utilisé est non seulement capable de fournir des mesures de haute précision, mais aussi des mesures sans référence à des énergies de transition théorique ou expérimentales. Quatre énergies de transition de n = 2 → n = 1 ont été mesurées pour des ions d’argon de trois états de charge différents, héliumoïde, lithiumoïde et berylliumoïde, avec une précision meilleure que 3 ppm. La largeur naturelle de chaque raie a également été obtenue expérimentalement. Les résultats trouvés sont en excellent accord avec les calculs théoriques les plus récents
This work aims to provide insight on Bound-State Quantum-Electrodynamics (BSQED) by experimental fundamentals high-precision tests in exotic states of matter. Although BSQED and the relativistic many-body problem have been undergoing important progress, there are still some issues that require the increase of the number and accuracy of experimental fundamental tests. The first part of this work was done within the framework of the recent experiment in muonic helium ions (μ4He+ and μ3He+) by the CREMA collaboration. This experiment, aims to provide new accurate values for the root-mean-square (rms) charge radii of the helium isotopes nuclei that are extracted from the measurement of the Lamb Shift, i.e., the measurement of the energy difference between the 2S − 2P states. With the goal of measuring the transition energies with an accuracy of at least 50 ppm, the rms charge radii of the helium isotopes will be determined with an uncertainty of 0.03%, a factor of ten more precise than previous results obtained from electron scattering. The second part of this work aims the high-precision measurement of x-ray transitions in Highly-Charged Ions (HCI) using a Double-Crystal Spectrometer (DCS). These ions were produced in the plasma of an Electron-Cyclotron Resonance Ion Source (ECRIS). This kind of spectrometer is able not only to provide high-precision measurements but also reference-free measurements, without reference to any theoretical or experimental energy. Four transitions energies from n = 2 → n = 1 have been measured in an argon plasma in three different charge states, He-, Be- and Li-like, with an accuracy of better than 3 ppm. Besides the energies, the natural width of each transition has also been experimentally obtained. The obtained results are in excellent agreement with the most recent theoretical calculations
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AL, SALEH-MAHROUSSEH SALOUA. "Calcul relativiste, en electrodynamique quantique, de la diffusion compton sur un electron lie." Clermont-Ferrand 2, 1988. http://www.theses.fr/1988CLF21098.

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Pour expliquer le deplacement et l'elargissement du pic compton,lorsque l'energie du photon est voisine de l'energie de liaison de l'electron, il est necessaire d'introduire non seulement la liaison et le mouvement de l'electron, mais aussi le recul du mnoyau. On donne un calcul relativiste de la valeur quadratique moyenne de l'impulsion de l'electron et une expression generale des fonctions d'onde radiales. Pour le calcul analytique covariant de l'element de matrice ou utilise un propagateur pour un electron lie dans le schema de furry et determine la secton efficace, sans aucune integration
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Machado, Jorge Felizardo Dias Cunha. "High precision tests of QED Measurement of the alpha-particle and helion rms charge radius and the transition energies in highly-charged ions." Doctoral thesis, Sorbonne université, 2018. http://hdl.handle.net/10362/33710.

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Ce travail vise à contribuer à l’amélioration de notre connaissance de l’électrodynamique quantique des états liés, par des mesures de haute précision dans des états exotiques de la matière. Bien que notre connaissance de l’électrodynamique quantique des états liés et du problème relativiste à plusieurs corps aient fait des progrès importants ces dernières années, il reste des questions fondamentales dont la résolution nécessite d’augmenter le nombre et la précision des tests expérimentaux. La première partie de ce travail a été réalisée dans le cadre de l’expérience récente sur les ions muoniques d’hélium (μ4He+ et μ3He+) conduite par la collaboration CREMA. Cette expérience vise à fournir de nouvelles valeurs précises pour les rayons de charge moyens des noyaux des isotopes stables de l’hélium. Ces valeurs sont extraites de la mesure du déplacement de Lamb, c’est-à-dire, de la mesure de la différence d’énergie entre les États 2S − 2P. Une mesure des énergies de transition d’une précision d’au moins 50 ppm, permet de déterminer les rayons de charge des noyaux des isotopes d’hélium avec une incertitude de 0,03%, dix fois plus précise que les résultats précédents obtenus à partir de la diffusion d’électrons. La deuxième partie de ce travail a été de réaliser des mesures de haute précision de transitions de rayons X dans des ions fortement chargés, à l’aide d’un spectromètre à double cristal plan. Ces ions étaient produits dans le plasma d’une source d’ions de type ECRIS (electron-cyclotron resonance ion source). Le spectromètre utilisé est non seulement capable de fournir des mesures de haute précision, mais aussi des mesures sans référence à des énergies de transition théorique ou expérimentales. Quatre énergies de transition de n = 2 → n = 1 ont été mesurées pour des ions d’argon de trois états de charge différents, héliumoïde, lithiumoïde et berylliumoïde, avec une précision meilleure que 3 ppm. La largeur naturelle de chaque raie a également été obtenue expérimentalement. Les résultats trouvés sont en excellent accord avec les calculs théoriques les plus récents
This work aims to provide insight on Bound-State Quantum-Electrodynamics (BSQED) by experimental fundamentals high-precision tests in exotic states of matter. Although BSQED and the relativistic many-body problem have been undergoing important progress, there are still some issues that require the increase of the number and accuracy of experimental fundamental tests. The first part of this work was done within the framework of the recent experiment in muonic helium ions (μ4He+ and μ3He+) by the CREMA collaboration. This experiment, aims to provide new accurate values for the root-mean-square (rms) charge radii of the helium isotopes nuclei that are extracted from the measurement of the Lamb Shift, i.e., the measurement of the energy difference between the 2S − 2P states. With the goal of measuring the transition energies with an accuracy of at least 50 ppm, the rms charge radii of the helium isotopes will be determined with an uncertainty of 0.03%, a factor of ten more precise than previous results obtained from electron scattering. The second part of this work aims the high-precision measurement of x-ray transitions in Highly-Charged Ions (HCI) using a Double-Crystal Spectrometer (DCS). These ions were produced in the plasma of an Electron-Cyclotron Resonance Ion Source (ECRIS). This kind of spectrometer is able not only to provide high-precision measurements but also reference-free measurements, without reference to any theoretical or experimental energy. Four transitions energies from n = 2 → n = 1 have been measured in an argon plasma in three different charge states, He-, Be- and Li-like, with an accuracy of better than 3 ppm. Besides the energies, the natural width of each transition has also been experimentally obtained. The obtained results are in excellent agreement with the most recent theoretical calculations
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Greif, Anja Helene [Verfasser], Martin [Akademischer Betreuer] Kaupp, Martin [Gutachter] Kaupp, and Stephan P. A. [Gutachter] Sauer. "Relativistic effects on electronic structure and nuclear magnetic resonance shifts in heavy metal systems / Anja Helene Greif ; Gutachter: Martin Kaupp, Stephan P. A. Sauer ; Betreuer: Martin Kaupp." Berlin : Technische Universität Berlin, 2017. http://d-nb.info/1156013089/34.

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Books on the topic "Relativistic shift"

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Brown, Jessica. Fallibilism: Evidence and Knowledge. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198801771.001.0001.

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This book examines the prospects for infallibilism about knowledge, according to which one can know that p only if one has evidence which guarantees or entails that p. In particular, it focuses on the possibility of a non-sceptical infallibilism which rejects any kind of shifty view of knowledge, whether contextualist, relativist, or subject-sensitive invariantist. The availability of a non-shifty non-sceptical infallibilism seems to depend on whether such a view can defend a generous enough conception of evidence to allow us to have the knowledge we ordinarily take ourselves to have. In particular, such an infallibilist needs to allow that our evidence extends well beyond how things seem to us in our experience and includes claims about the external world. Thus, the infallibilism which is the focus of this book is committed to a generous conception of evidence. More precisely, I argue that infallibilism is committed to the following claims about evidence and evidential support: if p is evidence, then p is true; and if one knows that p, then p is part of one’s evidence, and p is evidence for p. However, I argue that these claims about evidence and evidential support are problematic. Furthermore, I argue that fallibilism can overcome the most serious objections levelled at it, which concern closure, concessive knowledge attributions, practical reasoning, and the threshold problem. So, I conclude that epistemologists who aim to avoid both scepticism and a shifty view of knowledge should be fallibilists.
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Book chapters on the topic "Relativistic shift"

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Seke, Josip. "Complete Lamb-Shift Calculation to Order α 5 without Applying the Concept of Relativistic Quantum Electrodynamics." In Coherence and Quantum Optics VII, 651–52. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-9742-8_196.

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Pilkuhn, Hartmut M. "Hyperfine Shifts, Radiative Corrections." In Relativistic Quantum Mechanics, 189–222. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05275-4_5.

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Autschbach, Jochen. "Calculation of Heavy-Nucleus Chemical Shifts. Relativistic All-Electron Methods." In Calculation of NMR and EPR Parameters, 227–47. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2004. http://dx.doi.org/10.1002/3527601678.ch14.

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Schreckenbach, Georg, Stephen K. Wolff, and Tom Ziegler. "Covering the Entire Periodic Table: Relativistic Density Functional Calculations of NMR Chemical Shifts in Diamagnetic Actinide Compounds." In Modeling NMR Chemical Shifts, 101–14. Washington, DC: American Chemical Society, 1999. http://dx.doi.org/10.1021/bk-1999-0732.ch007.

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Trigo, Abril. "Transatlantic Studies and the Geopolitics of Hispanism." In Transatlantic Studies, 67–75. Liverpool University Press, 2019. http://dx.doi.org/10.3828/liverpool/9781789620252.003.0006.

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Transatlantic Studies are the outcome of a dual shift: a geographical displacement provoked by the geopolitical de-banking of area studies and an epistemological rift produced by the biocapitalist regime of accumulation. This combined shift translates profound geopolitical realignments, economic transformations and epistemological quandaries that make up our global age. If the geographical displacement from continental regions to oceanic ranges was meant to salvage area studies from their geopolitical obsolescence, and the epistemological displacement from hardcore, neo-positivistic and developmentalist social sciences to relativistic, postmodern and postcolonial multiculturalism was a response to the economically driven and globally experienced cultural turn, the emergence of Hispanic Transatlantic studies can be understood as the last-ditch effort of U.S. Hispanism to regain its lost prestige and, perhaps, its historical hegemony by taking part on this global geopolitical realignment. In a familiar way, the academic goals of U.S. Hispanic studies coincide once again with the global strategy of the ideology of Hispanism, confusedly entangled with the overlapping interests of Spanish capitalism and transnational corporations, in such a way that Spanish cultural and moral hegemony over the Hispanic world become an alibi for global economics and international geopolitics.
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KAWASAKI, S. "Generation and Resonance Absorption of Doppler Shift Dominated Cyclotron Maser Radiation by an Intense Relativistic Electron Beam." In Applied Electromagnetics in Materials, 91–101. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-08-037191-7.50013-4.

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Kaupp, M. "Relativistic Effects on NMR Chemical Shifts." In Theoretical and Computational Chemistry, 552–97. Elsevier, 2004. http://dx.doi.org/10.1016/s1380-7323(04)80036-0.

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"The objectivist and relativist shift in epistemology: Objectivity and reliability in psychoanalysis." In The quality of the mind, 141–72. Brill | Rodopi, 2012. http://dx.doi.org/10.1163/9789401207621_007.

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Tew, Yvonne. "Rights Rhetoric." In Constitutional Statecraft in Asian Courts, 21–33. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198716839.003.0002.

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Two competing narratives of rights constitutionalism have emerged in the rights discourse in Asian democracies. One account is often characterized as a universalist approach toward individual rights, driven by Western notions of liberalism and focused on civil and political liberties. In contrast, some Asian states have asserted a relativist approach toward rights, prioritizing communitarian interests and economic development over individual freedoms of expression, assembly, and personal liberty. Pitted against each other, these two frames have produced dichotomies perceived as being in tension with each other: between universalism and relativism, between individualism and communitarianism, and between civil-political rights and economic development. These constructed dichotomies perpetuated during the “Asian values” debate have continued even in the aftermath of that discourse to shape rights rhetoric and practice in the states that had been its strongest proponents. Yet the established political and constitutional paradigm has begun to shift. The changing political and popular landscape has been due in part to sustained political participation and growing rights consciousness since the turn of the twenty-first century in modern Malaysia and Singapore. This emerging culture of constitutionalism sets the backdrop for developing constitutional adjudication in these aspiring Asian democracies.
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Grossmann, Matt. "The Quiet Resolution of the Science Wars." In How Social Science Got Better, 53–79. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197518977.003.0003.

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The “science wars” were resolved surprisingly quietly. Throughout the 1980s and 1990s, critics of science from humanities disciplines fought with scientists over the extent to which science is a social and biased process or a path to truth. Today, there are few absolute relativists or adherents of scientific purity and far more acknowledgment that science involves biased truth-seeking. Continuing (but less vicious) wars over Bayesian and frequentist statistics likewise ignore some key agreements: tests of scientific claims require clarifying assumptions and some way to account for confirmation bias, either by building it into the model or by establishing more severe tests for the sufficiency of evidence. This sedation was accompanied by shifts within social science disciplines. Debates over both simplistic models of human nature (especially over rational choice theory) and over what constituted proper quantitative and qualitative methods died down as nearly everyone became theoretically and methodologically pluralist in practice. I herald this evolution, pointing to its benefits in the topics we cover, the ideas we consider, the evidence we generate, and how we evaluate and integrate our knowledge.
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Conference papers on the topic "Relativistic shift"

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Petit, Gerard. "On the relativistic rate shift of frequency standards." In 2010 Conference on Precision Electromagnetic Measurements (CPEM 2010). IEEE, 2010. http://dx.doi.org/10.1109/cpem.2010.5544396.

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Paschoal, Diego F. S., and Joyce H. C. e. Silva. "Relativistic prediction of Pt-195 NMR chemical shift using the NMR- DKH basis sets." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol2020184.

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Nuclear magnetic resonance (NMR) spectroscopy has played an important role in the discovery and design of new drugs with antitumor potential and the Pt-195 NMR has a fundamental role since the Pt-195 nucleus is very sensitive to the nature of the ligands in the coordination sphere and the oxidation state of the metal. The theoretical prediction of the Pt-195 NMR chemical shift is an extremely difficult task in which several factors must be taken into accounts, such as basis sets, electronic correlation, solvent, and relativistic effects. In an earlier study, Paschoal et al. developed the NMR-DKH basis sets and a nonrelativistic protocol for predicting the Pt-195 NMR chemical shift. The authors studied a set of 258 Pt(II) complexes and obtained a mean absolute deviation (MAD) of 168 ppm and a mean relative deviation (MRD) of 5%. However, relativistic calculations with the NMR-DKH basis sets have not been performed. Thus, the present work aims to apply the NMR-DKH in predicting the Pt-195 NMR chemical shift including the relativistic effects. The cisplatin was used as a model and its geometry was optimized and characterized as a minimum point on the potential energy surface at the B3LYP/LANL2DZ/def2-SVP/COSMO level. The Pt-195 NMR chemical shift was calculated at the DFT-Functional-DKFull/NMR-DKH/COSMO, where the functionals BP86, PBE, BLYP, PBE0, and B3LYP were tested. All calculations were carried out in NWCHEM 7.0.0 program. From the calculated results, it can be observed that the pure GGA functionals showing a better performance when compared to the hybrid functional. The best result was obtained at the BLYP-DKFull/NMR-DKH/COSMO level, where a DAM and DRM of only 34 ppm and 1.6% was found.
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Grotch, H. "Status report on the theory of the lamb shift in hydrogen." In Relativistic, quantum electrodynamics, and weak interaction effects in atoms. AIP, 1989. http://dx.doi.org/10.1063/1.38423.

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Rothleitner, Ch, T. M. Niebauer, and O. Francis. "Precision measurement of the relativistic Doppler shift of an accelerated system." In 2014 Conference on Precision Electromagnetic Measurements (CPEM 2014). IEEE, 2014. http://dx.doi.org/10.1109/cpem.2014.6898348.

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Keitel, C. H., M. Protopapas, J. P. Connerade, and P. I. Knight. "Magnetic and Relativistic Mass Shift Effects in the Atom-Intense Laser Field Interaction." In EQEC'96. 1996 European Quantum Electronic Conference. IEEE, 1996. http://dx.doi.org/10.1109/eqec.1996.561589.

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Shovkovy, Igor A., Alejandro Ayala, Guillermo Contreras, Ildefonso Leon, and Pedro Podesta. "Chiral shift in dense relativistic matter in a strong magnetic field[sup 1]." In XII MEXICAN WORKSHOP ON PARTICLES AND FIELDS. AIP, 2011. http://dx.doi.org/10.1063/1.3622712.

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Johnston, George L., Shien C. Chen, George Bekefi, and Ronald C. Davidson. "Models of driven relativistic magnetrons with nonlinear frequency-shift and growth-saturation effects." In OE/LASE '90, 14-19 Jan., Los Angeles, CA, edited by Howard E. Brandt. SPIE, 1990. http://dx.doi.org/10.1117/12.18549.

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Johnston, George L., Shien C. Chen, Ronald C. Davidson, and George Bekefi. "Models of driven and mutually coupled relativistic magnetrons with nonlinear frequency-shift and growth-saturation effects." In Optics, Electro-Optics, and Laser Applications in Science and Engineering, edited by Howard E. Brandt. SPIE, 1991. http://dx.doi.org/10.1117/12.43484.

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Kohno, Nanase, Ryuji Itakura, and Masaaki Tsubouchi. "Frequency up-shift of THz light via relativistic Doppler reflection: As new probe for investigating carrier dynamics." In 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). IEEE, 2016. http://dx.doi.org/10.1109/irmmw-thz.2016.7758573.

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Glushkov, A. V., O. Khetselius, E. Gurnitskaya, A. Loboda, E. Mischenko, Dong-Qing Wei, and Xi-Jun Wang. "Relativistic Quantum Chemistry of Heavy Elements: Interatomic potentials and Lines Shift for Systems “Alkali Elements-Inert Gases”." In THEORY AND APPLICATIONS OF COMPUTATIONAL CHEMISTRY—2008. AIP, 2009. http://dx.doi.org/10.1063/1.3108370.

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Reports on the topic "Relativistic shift"

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Zilberman, Mark. The "Dimming Effect" Produced by the Application of Doppler Effect on the Quantity of Photons Arriving to a Receiver and its Implication to Astronomy (ver. 2). Intellectual Archive, November 2020. http://dx.doi.org/10.32370/iaj.2444.

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This article describes the "Dimming effect" that is produced by the Doppler effect applied to a quantity of individual photons arriving to a receiver from a moving source of light. The corpuscular-wave dualism of light suggests that the well-known Doppler effect, which is currently applied only to the wave component of light, should also be considered for the corpuscular component of light. Application of the Doppler effect on a quantity of photons leads to the "Dimming Effect" - as the faster light source is moving away from observer - the dimmer its brightness appears. While the described dimming effect is negligible for low-speed light sources, it becomes significant for light sources with a velocity comparable to light speed in a vacuum. The relativistic adjustments for time dilation cause the described dimming effect to be even stronger. For example, the "Dimming Effect" for an object moving away from the observer with the speed 0.1c is 0.904 and for an object moving away from the observer with the speed 0.5c is 0.577. Article also provides the formula for the calculation of "Dimming effect" values using the red-shift parameter Z widely used in astronomy as N/N0=1/(Z+1). If confirmed, the "Dimming effect" must be taken into account in calculations of astronomical "Standard Candles" and in particular in the "Supernova Cosmology Project", which has claimed the acceleration of the Universe's expansion and led to the introduction of dark energy.
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