1,939 research outputs found
Commentaires sur la Théorie Psychanalytique du Moi
Dès les années 1900, et même avant que son intérêt se soit définitivement porté de la théorie physiologique à la théorie psychologique,
Freudparle d'un Moi, en partie dans un sens qui fait présagernettement
les développements ultérieurs de la psychologie du Moi. Cependant,
l'élaboration plus approfondie de cette partie de son travail a dû être
retardée pendant une période au cours de laquelle sa préoccupation
principale était le développement d'autres aspects de la psychanalyse.
Tous les travaux révolutionnaires de ces années approchent la personnalité en passant par ce que nous appellerions aujourd'hui l'étude du
Ça. Ainsi, dans l'analyse, une base importante de faits et d'hypothèses
a été établie
— sur les lois gouvernant les processus mentaux inconscients, sur les caractéristiqueset le développementdes pulsions instinctuelles, et sur certains aspects du conflit psychique — dont l'absence
avait été un grave handicap pour la psychologie préanalytique. Le fait
que l'étude du Ça par Freud a précédé son approche de la psychologie
structurale est en vérité un des événements les plus importants dans
l'histoire de la psychologie
On the nature of the Herbig B[e] star binary system V921 Scorpii: Geometry and kinematics of the circumprimary disk on sub-AU scales
V921 Scorpii is a close binary system (separation 0.025") showing the
B[e]-phenomenon. The system is surrounded by an enigmatic bipolar nebula, which
might have been shaped by episodic mass-loss events, possibly triggered by
dynamical interactions between the companion and the circumprimary disk (Kraus
et al. 2012a). In this paper, we investigate the spatial structure and
kinematics of the circumprimary disk, with the aim to obtain new insights into
the still strongly debated evolutionary stage. For this purpose, we combine,
for the first time, infrared spectro-interferometry (VLTI/AMBER, R=12,000) and
spectro-astrometry (VLT/CRIRES, R=100,000), which allows us to study the
AU-scale distribution of circumstellar gas and dust with an unprecedented
velocity resolution of 3 km*s^-1. Using a model-independent photocenter
analysis technique, we find that the Br-gamma-line emission rotates in the same
plane as the dust disk. We can reproduce the wavelength-differential
visibilities and phases and the double-peaked line profile using a
Keplerian-rotating disk model. The derived mass of the central star is
5.4+/-0.4 M_sun*(d/1150 pc), which is considerably lower than expected from the
spectral classification, suggesting that V921 Sco might be more distant (d
approx 2kpc) than commonly assumed. Using the geometric information provided by
our Br-gamma spectro-interferometric data and Paschen, Brackett, and Pfund line
decrement measurements in 61 hydrogen recombination line transitions, we derive
the density of the line-emitting gas (N_e=2...6*10^19 m^-3). Given that our
measurements can be reproduced with a Keplerian velocity field without
outflowing velocity component and the non-detection of age-indicating
spectroscopic diagnostics, our study provides new evidence for the
pre-main-sequence nature of V921 Sco.Comment: 17 pages, 11 figures, 3 tables, accepted by Ap
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Low-Tg phosphate glasses with improved water resistance for the coating of fluoride glass fibers
Starting from a multicomponent lead phosphate glass composition given in the literature, a glass was developed suitable for the protective overclad of heavy-metal fluoride glass fibers. Besides a low glass transition temperature 18 * 10⁻⁶ K⁻¹ the phosphate glass material developed had a water resistance at 60°C for 10 h comparable to that of commercial container glass. The final composition developed was (in mol%): 54.7 P₂O₅, 19.8 PbO, 18.0 Na₂O, 1.2 MgO, 1.2 BaO, 1.2 CaO, 0.4 V₂O₅, 1.5 AI₂O₃, 2.0 Bi₂O₃. Besides the influences of these different components the acdon of the melting conditions, especially melting temperature and trace SiO₂ content from the crucible material, have to be taken into account. Fiber drawing experiments including the in-situ apphcation of the phosphate glass overclad were successful
Supplementary data for article: Molloy, S.; Nikodinović-Runić, J.; Martin, L. B.; Hartmann, H.; Solano, F.; Decker, H.; O’Connor, K. E. Engineering of a Bacterial Tyrosinase for Improved Catalytic Efficiency towards D-Tyrosine Using Random and Site Directed Mutagenesis Approaches. Biotechnology and Bioengineering 2013, 110 (7), 1849–1857. https://doi.org/10.1002/bit.24859
Supporting information for: [https://doi.org/10.1002/bit.24859]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/1359]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/3491
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