2,307 research outputs found
Gattungen und Arten der Schwämme
Enthält: [Hauptbd.] Accedvnt Icones LVII Fvngorvm Nonnvllorvm Agri Jenensis, Secvndvm Natvram Ab Avtore Depictae; Aeri Incisae Et Vivis Coloribvs Fvcatae a I. S. Capievx = Nebst 57 vom Verfasser nach der Natur gemahlten und von Herrn Capieux gestochenen und illuminirten Abbildungen einiger Schwämme aus der Gegend von Jena, 1783 1. Continuatio prima Describens CXXV Species Et Varietates Totidem Iconibus LIX - CLXXXIII Repraesentatas, 1786 2. Continuatio secunda Describens XLIX. Species et Varietates, Totidem Iconibus CLXXXIV - CCXXXII. Repraesentatas, 178
Red Dragon: A Redshift-Evolving Gaussian Mixture Model for Galaxies
Precision-era optical cluster cosmology calls for a precise definition of the
red sequence (RS), consistent across redshift. To this end, we present the Red
Dragon algorithm: an error-corrected multivariate Gaussian mixture model (GMM).
Simultaneous use of multiple colors and smooth evolution of GMM parameters
result in a continuous RS and blue cloud (BC) characterization across redshift,
avoiding the discontinuities of red fraction inherent in swapping RS selection
colors. Based on a mid-redshift spectroscopic sample of SDSS galaxies, a RS
defined by Red Dragon selects quenched galaxies (low specific star formation
rate) with a balanced accuracy of over 90%. This approach to galaxy population
assignment gives more natural separations between RS and BC galaxies than hard
cuts in color--magnitude or color--color spaces. The Red Dragon algorithm is
publicly available at bitbucket.org/wkblack/red-dragon-gamma.Comment: 17 pages, 14 figures; comments welcom
Feedback control architecture & the bacterial chemotaxis network
Bacteria move towards favourable and away from toxic environments by changing their swimming pattern. This response is regulated by the chemotaxis signalling pathway, which has an important feature: it uses feedback to ‘reset’ (adapt) the bacterial sensing ability, which allows the bacteria to sense a range of background environmental changes. The role of this feedback has been studied extensively in the simple chemotaxis pathway of Escherichia coli. However it has been recently found that the majority of bacteria have multiple chemotaxis homologues of the E. coli proteins, resulting in more complex pathways. In this paper we investigate the configuration and role of feedback in Rhodobacter sphaeroides, a bacterium containing multiple homologues of the chemotaxis proteins found in E. coli. Multiple proteins could produce different possible feedback configurations, each having different chemotactic performance qualities and levels of robustness to variations and uncertainties in biological parameters and to intracellular noise. We develop four models corresponding to different feedback configurations. Using a series of carefully designed experiments we discriminate between these models and invalidate three of them. When these models are examined in terms of robustness to noise and parametric uncertainties, we find that the non-invalidated model is superior to the others. Moreover, it has a ‘cascade control’ feedback architecture which is used extensively in engineering to improve system performance, including robustness. Given that the majority of bacteria are known to have multiple chemotaxis pathways, in this paper we show that some feedback architectures allow them to have better performance than others. In particular, cascade control may be an important feature in achieving robust functionality in more complex signalling pathways and in improving their performance
Multidimensional Fourier Quasicrystals I. Sufficient Conditions
We derive sufficient conditions for an atomic measure where
are positive integers, and is the point measure at
to be a Fourier quasicrystal, and suggest why they may also be
necessary. These conditions extend the necessary and sufficient conditions
derived by Lev, Olevskii, and Ulanovskii for Our methods exploit the
toric geometry relation between Grothendieck residues and Newton polytopes
derived by Gelfond and Khovanskii.Comment: 17 page
Adaptations and limitations of ring test for bovine brucellosis
Digitized 2007 AES.Includes bibliographical references (pages 41-43)
How Does Casimir Energy Fall?
Doubt continues to linger over the reality of quantum vacuum energy. There is
some question whether fluctuating fields gravitate at all, or do so
anomalously. Here we show that for the simple case of parallel conducting
plates, the associated Casimir energy gravitates just as required by the
equivalence principle, and that therefore the inertial and gravitational masses
of a system possessing Casimir energy are both . This simple
result disproves recent claims in the literature. We clarify some pitfalls in
the calculation that can lead to spurious dependences on coordinate system.Comment: 5 pages, 1 figure, REVTeX. Minor revisions, including changes in
reference
Pengaruh Latihan Sirkuit Terhadap Daya Tahan Pada Tim Sepakbola SMKN 5 Pekanbaru
The problem in this study came from the interim results of observation carried out by researchers in the field. Researchers found the problem is the lack of durability that is owned by the football team SMKN 5 Pekanbaru. The purpose of this study was to determine the effect on the endurance circuit training on the football team SMKN 5 Pekanbaru. The study used the approach of one-group pretest-posttest design. The population in this study is a soccer player who SMKN Pekanbaru 5 of 16 people by using total sampling where all population sampled, to obtain research data using preliminary tests pretest and post-test after it was given a circuit workout. Diproleh The data were analyzed using t-test. Based on data analysis found that a circuit workout effect on durability on the football team SMKN 5 Pekanbaru, marked from the results diproleh namely 2,595 tcount > rtable 1,753. From the results obtainable circuit training effect on the durability of the soccer team SMKN 5 Pekanbaru
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