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Aufsatz
Biogeography of the Sunda Shelf revisited: Insights from Macaranga section Pruinosae (Euphorbiaceae)
(2023-01-17)
The Southeast Asian region of Sundaland is among the world’s major biodiversity hotspots. The region’s biodiversity coupled with its complex and dynamic geographic and climatic histories makes it an ideal region to study the various factors that determine the diversification and distribution patterns of tropical biota. Here we investigate the biogeographic patterns in the partly myrmecophytic Macaranga section Pruinosae to reveal some of the factors that play a role in determining the distribution of biota in Sundaland. ...
Aufsatz
Genotyping by sequencing and a newly developed mRNA-GBS approach to link population genetic and transcriptome analyses reveal pattern differences between sites and treatments in red clover (Trifolium pratense L.)
(2023-01-17)
The important worldwide forage crop red clover (Trifolium pratense L.) is widely cultivated as cattle feed and for soil improvement. Wild populations and landraces have great natural diversity that could be used to improve cultivated red clover. However, to date, there is still insufficient knowledge about the natural genetic and phenotypic diversity of the species. Here, we developed a low-cost complexity reduced mRNA analysis (mRNA-GBS) and compared the results with population genetic (GBS) and previously published ...
Aufsatz
Endangered Urban Commons: Lahore’s Violent Heritage Management and Prospects for Reconciliation
(2023-01-30)
The debate on urban commons yields relevance for shared histories and heritage in divided and post-conflict societies. Albeit memory is always subjective, heritage management tends to engender a linear view of the past that suggests a preconceived future development. Where the past is denigrated to prove the impossibility of ethnoreligious communities’ coexistence even though they have lived together peacefully for centuries, it risks corroborating us-them divisions for posterity and undermines reconciliation and ...
Buch
Kulturtransfer und Wissenszirkulation in den langen 1960er Jahren. Das deutsch-amerikanische Fulbright-Programm für Lehrer:innen.
(Julius Klinkhardt, 2023)
Kulturtransfer und Wissenszirkulation in den langen 1960er Jahren. Das deutsch-amerikanische Fulbright-Programm für Lehrer:innen. Die Dissertation zeichnet die interkulturellen Wissensbewegungen zwischen Westdeutschland und den USA in den langen 1960er Jahren im alltagskulturellen und schulisch-professionellen Kontext angestoßen durch den Lehrer:innenaustausch des deutsch-amerikanischen Fulbright-Programms nach. Erstmalig werden hierzu die Annual Exchange Teacher’s Reports on Teaching Experiences in the United States ...
Buch
Das kritisch-alternative pädagogische Milieu um 1968. Wissensbewegungen zwischen Handlungspraxis, Politik und Wissenschaft.
(Julius Klinkhardt, 2023)
Die späten 1960er Jahre können als eine Zeit des demokratischen Aufbruchs und des gesellschaftlichen Umschwungs, auch bezogen auf die Thematisierungen von Bildung und Erziehung, bezeichnet werden. Diesem Zeitraum der Kritik und des Infragestellens als Ausgangspunkt nehmend, knüpft die Arbeit an, um Wissensbewegungen zu untersuchen. So werden, anhand von 9 biographischen Erzählungen mit Personen, die um 1968 in pädagogischen oder politischen Praxisprojekten aktiv waren, Wissenszirkulations- und Wissentransformationsprozesse ...
Aufsatz
Miniaturized interferometric confocal distance sensor for surface profiling with data rates at ultrasonic frequencies
(2023-01-12)
Point-wise measuring profilometers like the tactile stylus instruments or optical sensors are established measurement tools in science and industry to measure and characterize surface textures. We present a fiber-coupled laser interferometric confocal distance sensor for surface profiling. The sensor is characterized by small geometric dimensions and by its high lateral
scanning speed. The ability to measure specularly reflecting and rough surface textures are demonstrated by performing several measurements on a ...
Aufsatz
Model-based investigations of ferroelectric energy harvesting with regard to an improvement of life span and operability
(2023-02-13)
A new ferroelectric energy harvesting concept is investigated theoretically, based on a thermo-electromechanical multiscale constitutive framework in connection with the so-called condensed method. Taking advantage of comparatively large changes of strain and polarization due to domain switching, the electric output is higher compared to what is commonly known as
piezoelectric energy harvesting. Dissipative self-heating and augmented damage accumulation, on the other hand, may impede the operability of the harvesting ...
Aufsatz
Lateral resolution enhanced interference microscopy using virtual annular apertures
(2023-01-27)
The lateral resolution in microscopic imaging generally depends on both, the wavelength of light and the numerical aperture of the microscope objective lens. To quantify the lateral resolution Ernst Abbe considered an optical grating illuminated by plane waves. In contrast, the Rayleigh criterion holds for two point sources or point scatterers separated by a lateral distance, which are
supposed to emit spherical waves. A portion of each spherical wave is collected by the objective lens and results in an Airy disc ...
Aufsatz
Theoretical study of spin polarization in multiphoton ionization of Xe
(2023-04-21)
Spin polarization in the multiphoton above-threshold ionization of 5p3/2- and 5p1/2-electrons of Xe with intense 395nm, circularly polarized laser pulses, is investigated theoretically. For this purpose, we solve the time-dependent Schrödinger equation on the basis of spherical spinors. We, thus, simultaneously propagate the spin-up and spin-down single-active-electron wave packets, driven by the laser pulses in the ionic potential, which includes the spin–orbit interaction explicitly. The present theoretical results ...
Rezension
Siefken, Sven T. (Hrsg.) (2021): Wahlkreisarbeit von Bundestagsabgeordneten. Parlamentarische Repräsentation in der Corona-Krise
(2023-01-11)
Rezension von Nadin Fromm zu: Siefken, Sven T. (Hrsg.) (2021): Wahlkreisarbeit von Bundestagsabgeordneten. Parlamentarische Repräsentation in der Corona-Krise. Wiesbaden: Springer VS. 150 Seiten. 54,99 €