Search Results - (Author, Cooperation:Vogeler)
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1Articles: DFG German National LicensesVOGELER, I. ; SCOTTER, D. R. ; CLOTHIER, B. E. ; TILLMAN, R. W.
Oxford, UK : Blackwell Publishing Ltd
Published 1997Staff ViewISSN: 1365-2389Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeosciencesAgriculture, Forestry, Horticulture, Fishery, Domestic Science, NutritionNotes: In the quest for better understanding of cation movement through undisturbed soils, leaching experiments on 300-mm long undisturbed soil columns of two contrasting soils were carried out. One soil was a weakly-structured alluvial fine sandy loam, the other a well-structured aeolian silt loam. About 2000 mm of solutions of MgCl2 and Ca(NO3)2 of 0·025 M were applied at unsaturated water flow rates of between 3 and 13 mm h−1. Solute movement was monitored over several weeks by collecting effluent under suction at the base. In the sandy loam anion transport was influenced by exclusion from the double layer, whereas in the Ramiha soil anion adsorption occurred. Cation transport was described by coupling the convection-dispersion equation with cation exchange equations. Good simulations of the Mg2+ and Ca2+ concentrations in the effluent and on the exchange sites were obtained if 80% of the exchangeable cations, as measured using the 1 M ammonium acetate method, were assumed to be active. Local physical or chemical disequilibrium did not need to be explicitly taken into account. About 400 kg ha−1 of native potassium was leached from the alluvial soil, but only about 10 kg ha−1 was leached from the aeolian soil. The convection-dispersion equation coupled with exchange theory was found to describe cation transport under unsaturated flow through undisturbed soil satisfactorily.Type of Medium: Electronic ResourceURL: -
2Articles: DFG German National LicensesEinfeldt, S. ; Kirchner, V. ; Heinke, H. ; Dießelberg, M. ; Figge, S. ; Vogeler, K. ; Hommel, D.
[S.l.] : American Institute of Physics (AIP)
Published 2000Staff ViewISSN: 1089-7550Source: AIP Digital ArchiveTopics: PhysicsNotes: Relaxation of tensile strain in AlxGa1−xN layers of different compositions epitaxially grown on GaN/sapphire is investigated. Extended crack channels along 〈2110〉 directions are formed if the aluminum content exceeds a critical value, which decreases with increasing layer thickness. This process is found to limit the average strain energy density to a maximum value of 4 J/m2. By calculating the stress distribution between cracks and the strain energy release rate for crack propagation, the relaxed strain as measured by x-ray diffraction is correlated to the crack density, and the onsets of crack channeling and layer decohesion are fitted to a fracture toughness of 9 J/m2. Moreover, the crack opening at the surface is found to linearly increase with the stress. Annealing of samples above the growth temperature introduces additional tensile stress due to the mismatch in thermal expansion coefficients between the layer and substrate. This stress is shown to relieve not only by the formation of additional cracks but also by the extension of cracks into the GaN layer and a thermal activated change in the defect structure. © 2000 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
3Articles: DFG German National LicensesStaff View
ISSN: 1467-8330Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeographyType of Medium: Electronic ResourceURL: -
4Articles: DFG German National LicensesStaff View
ISSN: 1467-8330Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeographyType of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesStaff View
ISSN: 1467-8330Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: GeographyType of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesStaff View
ISSN: 0022-1341Topics: GeographyURL: -
7Articles: DFG German National LicensesSouza, Anthony de ; Vogeler, Ingolf ; Foust, Brady
Macomb, Ill., etc. : Periodicals Archive Online (PAO)
Published 1981Staff ViewISSN: 0022-1341Topics: GeographyNotes: FEATURE ARTICLESURL: -
8Articles: DFG German National LicensesStaff View
ISSN: 0022-1341Topics: GeographyNotes: Teacher's NotebookURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 0022-1341Topics: GeographyURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 0022-1341Topics: GeographyNotes: Software ReviewsURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 0022-1341Topics: GeographyDescription / Table of Contents: ReviewsNotes: Special Issue: The Teachers SpeakURL: -
12Articles: DFG German National LicensesHartman, Jeffrey ; Vogeler, Ingolf
Macomb, Ill., etc. : Periodicals Archive Online (PAO)
Published 1993Staff ViewISSN: 0022-1341Topics: GeographyURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 0022-1341Topics: GeographyURL: -
14Articles: DFG German National LicensesCalculation of moments of inertia and gyromagnetic ratios including residual p-h and p-p interactionStaff View
ISSN: 0375-9474Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 0375-9474Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesLorenz, A. ; Ball, Erna ; Mendel, Kurt ; Vogeler ; Weimann ; Hannes ; Haenel, H. ; König, E. ; Liguori-Hohenauer ; Jendralski, F. ; Kloiber, Hans ; Strauss, M. ; Besserer ; Foerster ; Glass, V. ; Meixner ; Simon ; Schlingmann ; Bortolotti, Carlo ; Menze ; Dumont ; Jastrowitz ; Rieβ ; Pliverić ; Joseph
Springer
Published 1928Staff ViewISSN: 1437-1596Source: Springer Online Journal Archives 1860-2000Topics: MedicineLawType of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesFranken ; Hempel, Erich ; Lehmann, Walter ; Pette ; Haenel, H. ; Heckenbach ; Meyer, F. Th. ; Vogeler ; Lossen, Heinz ; Ziemke ; Giese ; Kornfeld ; Többen
Springer
Published 1932Staff ViewISSN: 1437-1596Source: Springer Online Journal Archives 1860-2000Topics: MedicineLawType of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesFleck ; Hauptmann ; Volkmann, Joh ; Imber ; Stern, F. ; Hoche, A. ; Klieneberger ; Mendel, Kurt ; Fränkel, F. ; Schönberg ; Braun, E. ; Pohlisch ; Mittermaier, R. ; Ziemke ; Ravasini ; Wehner, E. ; Kalmus ; Reuter, K. ; Vogeler ; Rosenburg, Gustav ; Bange ; Alexander, W. ; Tobias, E. ; Valentin, B.
Springer
Published 1930Staff ViewISSN: 1437-1596Source: Springer Online Journal Archives 1860-2000Topics: MedicineLawType of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesRose, M. ; Wachholz ; Timm ; König, W. ; Wohlgemuth ; Zillmer ; Schrader ; Sulze ; Walcher ; Vogeler ; Budde, Max ; Abeles ; Strauβ, M. ; Pólya ; Schönberg ; Lobmayer
Springer
Published 1931Staff ViewISSN: 1437-1596Source: Springer Online Journal Archives 1860-2000Topics: MedicineLawType of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesFischer, W. ; Peters, Gerd ; Eversbusch ; Jacob ; Tobler ; Tilk ; Keilhack, H. ; Vogeler ; Oeser, H. ; Steffel ; Weimann ; Merkel ; Warstadt, Arno ; Koch, Rudolf ; Schiersmann ; Janzen, R. ; Magnussen ; Ostertag ; König ; Voss ; Pohlandt ; Demuth ; Bremner ; Pönitz ; Schlossberger
Springer
Published 1942Staff ViewISSN: 1437-1596Source: Springer Online Journal Archives 1860-2000Topics: MedicineLawType of Medium: Electronic ResourceURL: