4,722 research outputs found
A new Australian species of Luffa (Cucurbitaceae) and typification of two Australian Cucumis names, all based on specimens collected by Ferdinand Mueller in 1856
As a result of his botanical explorations in northern Australia, Ferdinand von Mueller named several Cucurbitaceae that molecular data now show to be distinct, requiring their resurrection from unjustified synonymy. We here describe and illustrate Luffa saccata F. Muell. ex I.Telford, validating a manuscript name listed under L. graveolens Roxb. since 1859, and we lectotypify Cucumis picrocarpus F. Muell. and C. jucundus F. Muell. The lectotype of the name C. jucundus, a synonym of C. melo, is mounted on the same sheet as the lectotype of C. picrocarpus, which is the sister species of the cultivated C. melo as shown in a recent publication
Improved method of producing oxide-dispersion-strengthened alloys
Dispersion strengthened alloys having the required properties are produced by a process in which the refractory particles are less than 100 to 500 A thick. These are fine enough to ensure the strength characteristics without appreciable degradation of other characteristics. The alloy consists of a matrix metal and a dispersoid metal
XXZ-like phase in the F-AF anisotropic Heisenberg chain
By means of the Density Matrix Renormalization Group technique, we have
studied the region where -like behavior is most likely to emerge within
the phase diagram of the F-AF anisotropic extended () Heisenberg chain.
We have analyzed, in great detail, the equal-time two-spin correlation
functions, both in- and out-of- plane, as functions of the distance (and
momentum). Then, we have extracted, through an accurate fitting procedure, the
exponents of the asymptotic power-law decay of the spatial correlations. We
have used the exact solution of model () to benchmark our results,
which clearly show the expected agreement. A critical value of has been
found where the relevant power-law decay exponent is independent of the
in-plane nearest-neighbor coupling.Comment: 5 pages, 4 figures. Accepted for publication in European Physical
Journal
Experimental research on the development of Ceratium hirundinella O.F.Muller [Translation from: Z.Bot. 14, 337-371, 1922]
The most important aim of this study lay in filling in the great gap in our knowledge of the processes of germination in the Ceratium cyst and the early developmental stages in the standing stock of Ceratium hirundinella. contained rich cysts, we now succeeded extraordinarily well in pursuing the consistent development of Ceratium from the cyst to the completed cell. A series of experiments were carried out on the cysts and the juvenile stages of Ceratium, which showed very interesting results. The author presents in a general descriptive part the normal processes of germination in Ceratium cysts and the development of the juvenile stages in order to show in an experimental part the changes in form of C. hirundinella under the influence of temperature, light and varying salinities
The Reflected (Un)Real: Space in Ingeborg Bachmann’s “Probleme Probleme”
In her 1977 short story “Probleme Probleme,” Ingeborg Bachmann plays with space and representations of reality in a way that reflects the disillusionment of Austria’s post-war generation. Beatrix’s two desires in the short story – to look at herself in the mirror and to sleep – both suggest a resistance to living in the real world and a dependence on the illusions of her dreams, mirrors, and the beauty salon. Although the older patrons of the salon and Beatrix try to hide from the responsibility for the past and present, the mirrors and the salon prove to be temporary illusions that are unsustainable. Sleep and mirrors become ways to avoid reality rather than coming to terms with it, which, for Bachmann, is ultimately unproductive and naïve
Real-time phasefront detector for heterodyne interferometers
We present a real-time differential phasefront detector sensitive to better
than 3 mrad rms, which corresponds to a precision of about 500 pm. This
detector performs a spatially resolving measurement of the phasefront of a
heterodyne interferometer, with heterodyne frequencies up to approximately 10
kHz. This instrument was developed as part of the research for the LISA
Technology Package (LTP) interferometer, and will assist in the manufacture of
its flight model. Due to the advantages this instrument offers, it also has
general applications in optical metrology
Resolution 86-4-F - Flagpole and Flags
Resolution to place flagpoles behind Downing University Center
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