Search Results - (Author, Cooperation:Drouot)
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1FIS Bildung LiteraturdatenbankStaff View
Type of Medium: articlePublication Date: 2004Keywords: Technologische Entwicklung ; Lohnstruktur ; Wirtschaftswachstum ; Arbeitslosigkeit ; Berufsbegleitende Ausbildung ; TheorieIn: Review of economic dynamics, Bd. 7 (2004) H. 3, S. 737-757, 1094-2025Language: English -
2FIS Bildung LiteraturdatenbankStaff View
Type of Medium: articlePublication Date: 2006Keywords: Begleitung (Psy) ; Bildungsplanung ; Unternehmen ; Weiterbildung ; Weiterbildungsberatung ; Bedarf ; Kompetenzentwicklung ; Qualität ; FrankreichIn: Actualité de la formation permanente, (2006) H. 202, S. 18, 0397-331XLanguage: French -
3Articles: DFG German National LicensesDrouot, V. ; Gendry, M. ; Santinelli, C. ; Viktorovitch, P. ; Hollinger, G. ; Elleuch, S. ; Pelouard, J.-L.
[S.l.] : American Institute of Physics (AIP)
Published 1995Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Growth interruptions under cation stabilization have been used to smooth the two interfaces defining the pseudomorphic channel layer of InAlAs/In0.75Ga0.25As/InAlAs heterostructures grown on InP. This leads to a 4 K electron mobility as high as 170 000 cm2/V s, due to the reduction of interface roughness scattering. This structure is used as a reference ("zero'' interface roughness) for a model to determine the influence of interface roughness scattering on the electron mobility as a function of the channel indium fraction (xIn=0.53, 0.65, and 0.75) in heterostructures grown without growth interruption. It is shown that the interface roughness scattering decreases with increasing indium concentration of the channel in the range 0.53–0.65 and saturates beyond xIn=0.65. © 1995 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesFréchengues, S. ; Bertru, N. ; Drouot, V. ; Lambert, B. ; Robinet, S. ; Loualiche, S.
Woodbury, NY : American Institute of Physics (AIP)
Published 1999Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: We report on the synthesis of InAs quantum dots on (311)B InP substrates. It is found that the use of such high index surfaces allows the formation of a high density (5×1010 islands/cm2) of small InAs islands (diameter(approximate)350 Å) on InP. Moreover, a large improvement of the size uniformity is obtained in comparison with deposition on (100) surface. The standard height deviations are ±13% and ±50% for islands grown on (311)B and (100) surfaces, respectively. Then, we show that the modification of the As/P flux sequences, after the island formation, permits the control of the quantum dot emission wavelength. The achievement of quantum dots emitting at 1.55 μm at 300 K indicates that this method is promising for telecom device making. © 1999 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesFréchengues, S. ; Drouot, V. ; Lambert, B. ; Lemoine, D. ; Loualiche, S.
Woodbury, NY : American Institute of Physics (AIP)
Published 1997Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: The optical properties of self-assembled InAs dots on InP have been measured by photoluminescence, and using a selective chemical etching of the InP cap layer, the geometrical properties of the same dots have been determined by atomic force microscopy. From the dot dimensions, the calculated (n=1) electron to heavy hole transition energies with a simple model are strongly correlated to the measured photoluminescence spectra. This technique allows a better understanding of the correlation between structural and optical properties of self-assembled dots. © 1997 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesGendry, M. ; Drouot, V. ; Hollinger, G. ; Mahajan, S.
Woodbury, NY : American Institute of Physics (AIP)
Published 1995Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: It is shown that critical thicknesses of In0.65Ga0.35As epilayers, grown by molecular beam epitaxy on lattice matched InAlAs/InP heterostructures, are affected by surface steps and excess arsenic, i.e., nonstoichiometry, in the overgrowth. The critical thickness is reduced in the presence of steps, but is observed to increase when the excess arsenic atoms are present in the layer. It is argued that the generation of dislocation loops required for misfit dislocations is facilitated at the step edges. The resulting misfit dislocations augment the strain relaxation produced by the glide of threading dislocations in the epilayers. On the other hand, the internal strains associated with the nonstoichiometry strengthens the lattice, thus making dislocation glide difficult which delays the relaxation process. © 1995 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesGendry, M. ; Drouot, V. ; Santinelli, C. ; Hollinger, G.
Woodbury, NY : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1077-3118Source: AIP Digital ArchiveTopics: PhysicsNotes: The growth and relaxation of highly strained In82Ga18As and InAs epilayers grown by molecular beam epitaxy, at 525 and 450 °C, on InGaAs lattice matched (LM) to InP, have been investigated using reflection high energy electron diffraction (RHEED) techniques. RHEED oscillations, three-dimensional growth mode onsets, and relaxation onsets have been measured. Strong strain and temperature effects have been observed on both growth mode and plastic relaxation mechanism. It is suggested that plastic relaxation could occur through two competing mechanisms, misfit dislocations or "3D island dislocations'' and that the actual mechanism can be predicted using specific temperature dependent laws for the critical thicknesses.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 0005-2760Keywords: (Platelet) ; Arachidonate oxygenation ; Icosaenoic metabolism ; PhospholipidSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyMedicinePhysicsType of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesDib, Colette ; Fauré, Sabine ; Fizames, Cécile ; Samson, Delphine ; Drouot, Nathalie ; Vignal, Alain ; Millasseau, Philippe ; Marc, Sophie ; Kazan, Jamile ; Seboun, Eric ; Lathrop, Mark ; Gyapay, Gabor ; Morissette, Jean ; Weissenbach, Jean
[s.l.] : Nature Publishing Group
Published 1996Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Microsatellite markers were obtained as described previously5'6. A heterozygosity above 0.5 was observed for 93% of the markers and above 0.7 for 58%. These values remain very close to those of our previous version6. Average heterozygosity per chromosome varied from 0.65 (chromosome X) to 0.73 ...Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 0304-8853Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 1435-1528Keywords: Non-homogeneous flow ; macromolecule ; diffusionSource: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesKadoun, A. ; Tardy, J. ; Thomas, I. ; Gendry, M. ; Drouot, V. ; Bremond, G. ; Barbier, D. ; Laugier, A.
Amsterdam : ElsevierStaff ViewISSN: 0169-4332Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesBouifraden, S. ; Drouot, C. ; Hadrami, M. ; Guenoun, F. ; Lecointe, L. ; Mai, N. ; Paris, M. ; Pothion, C. ; Sadoune, M. ; Sauvagnat, B. ; Amblard, M. ; Aubagnac, J. L. ; Calmes, M. ; Chevallet, P. ; Daunis, J. ; Enjalbal, C. ; Fehrentz, J. A. ; Lamaty, F. ; Lavergne, J. P. ; Lazaro, R. ; Rolland, V. ; Roumestant, M. L. ; Viallefont, Ph. ; Vidal, Y. ; Martinez, J.
Springer
Published 1999Staff ViewISSN: 1438-2199Keywords: α-Amino acids ; β-Amino acids ; α-Aryl-α-amino acids ; Chiral auxiliary ; Deracemization ; Glycosyl-α-amino acids ; 2-Hydroxypinan-3-one ; Immonium ions ; Urethane N-protected N-carboxyanhydridesSource: Springer Online Journal Archives 1860-2000Topics: MedicineNotes: Summary Some of the chemistry of amino acids going on in our laboratory (Laboratoire des Amino acides Peptides et Protéines) is described as well as some mass spectrometry methodology for their characterization particularly on solid supports. Several aspects are presented including: (i) the stereoselective synthesis of natural and unnatural amino acids using 2-hydroxypinan-3-one as chiral auxiliary; (ii) the stereoselective synthesis of natural and unnatural amino acids by deracemization ofα-amino acidsvia their ketene derivatives; (iii) the synthesis ofα-aryl-α-amino acidsvia reaction of organometallics with a glycine cation; (iv) the diastereoselective synthesis of glycosyl-α-amino acids; (v) the synthesis ofβ-amino acids using a-aminopyrrolidinopiperazinediones as chiral templates; (vi) the reactivity of urethane-N-protected N-carboxyanhydrides. To characterize natural and non natural amino acids through their immonium ions by mass spectrometry, some methodology is also described.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesStaff View
ISSN: 1435-1528Keywords: Polymermigration ; diffusion ; mixture ; thermodynamics ; velocitygradient flowSource: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyPhysicsNotes: Abstract Molecular migration in nonhomogeneous flows of a polyelectrolyte solution is considered. The solution is modelled as a binary mixture whose electrically-charged constituents are regarded as compressible fluids. Upon deriving a set of thermodynamic restrictions for the mixture, non-equilibrium quantities are examined in detail. As a result, two schemes are elaborated for the description of cross streamline migration, induced by the second gradient of the velocity, where also occur coupling effects. In the first scheme the migration effect is described through a stress term which involves a coupling with the conformation of the macromolecule; in the second scheme it is described through a term in the diffusion velocity where coupling occurs with the velocity gradient. In both cases the thermodynamic approach leads to a systematic framework with a minimal number of constitutive coefficients, which is an essential aspect for any comparison with experimental data.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 1435-1528Keywords: Polyelectrolyte ; thermodynamics ; electric polarization ; shear flowSource: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyPhysicsNotes: Abstract A phenomenological model for solutions of polyelectrolytes accounting for electromechanical interactions is proposed within the framework of continuum thermodynamics. The modelling involves the conformation of macromolecules in the form of a tensorial “internal variable” and the electric polarization of the solution. The paper aims to demonstrate the possible competition between flow and electricity effects on rigorous phenomenological grounds. Three kinds of dissipative mechanisms are accounted for: viscosity of the solution, electric relaxation and the relaxation of the conformation of macromolecules. Anisotropic effects induced by the applied electric field and flow-induced polarization through changes in conformation are exhibited. These effects are small. By way of application, the problem of the orientation and conformation taken by macromolecules of polyelectrolytes under the combined influence of a simple shear flow and a longitudinal or orthogonal electric bias field is treated in detail and illustrated graphically. Some optical properties are mentioned.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1435-1528Keywords: Polymer migration ; diffusion ; thermodynamics ; velocity-gradient flow ; generalized hydrodynamicsSource: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyPhysicsNotes: Abstract The present study concerns the phenomenon of flow-induced polymer migration. It is shown that Tirrell's diffusion flux can be deduced from a macroscopic modelling which involves second-order gradients and a vectorial internal variable related to the microstructure. In contrast to Tirrell's model, however, a migration may also occur across straight streamlines. The flow down an inclined plane is examined by way of example. The roles played by the microstructure and the second gradients, respectively, are thus exhibited.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 1435-1528Keywords: Polyelectrolyte ; dilute solution ; optical effect ; electrohydrodynamical flowSource: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyPhysicsNotes: Abstract A careful analysis of the equations governing dynamical disturbances in dilute solutions of polyelectrolytes (described on the basis of a conformational model with electromechanical interactions) allows one to place in evidence two extreme regimes, one called the optical regime, which justifies the use of optical methods for measuring the main instantaneous characteristics of the solutions, and the other that corresponds to electrohydrodynamical flows where a hierarchy can be exhibited for the various effects contributing to the flow equations.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesWollny, Rudolf ; Schweissinger, O. ; Bell, J. Carter ; Raumer, Ed. ; Goldmann, Felix ; Mansfeld ; Sendtner, Rudolf ; Röse, B. ; Longi, Antonio ; Besana, Carlo ; Bockairy, P. ; Scheffer ; Drouot ; Salvatori, Silvio ; Duclaux, E. ; Leeds, Albert R.
Springer
Published 1889Staff ViewISSN: 1618-2650Source: Springer Online Journal Archives 1860-2000Topics: Chemistry and PharmacologyType of Medium: Electronic ResourceURL: