The Safe-Conduct for the Abbasid ‘Abd Allāh b. ‘Ali (d. 764)

In his Ta’rīkh al-Mawil, al-Azdī (d. 945) records the safe-conduct (amān) said to have been written for the surrender of the Abbasid ‘Abd Allāh b. ‘Alī (d. 764) to his nephew, the caliph al-Manūr. This text has been overlooked in discussions of early Abbasid history and in studies of the work of Ibn al-Muqaffa‘ (d. c. 756), who is widely credited with its production. This article presents an annotated translation of the amān and considers its transmission, authenticity, attribution and significance. Parallels with epigraphic, documentary and literary sources suggest that it was indeed originally composed in the early Abbasid period and that it conforms to developing conventions for amāns. Thus, it is important evidence for political theory and practice in the mid-eighth-century caliphate. Furthermore, it probably substantially reflects the agreement between the caliph and his uncle and may indeed be the work of Ibn al-Muqaffa‘

Galois theory and Lubin-Tate cochains on classifying spaces

We consider brave new cochain extensions F(BG +,R) → F(EG +,R), where R is either a Lubin-Tate spectrum E n or the related 2-periodic Morava K-theory K n , and G is a finite group. When R is an Eilenberg-Mac Lane spectrum, in some good cases such an extension is a G-Galois extension in the sense of John Rognes, but not always faithful. We prove that for E n and K n these extensions are always faithful in the K n local category. However, for a cyclic p-group C p r, the cochain extension F(BC p r +,E n ) → F(EC p r +, E n ) is not a Galois extension because it ramifies. As a consequence, it follows that the E n -theory Eilenberg-Moore spectral sequence for G and BG does not always converge to its expected target

Impact of Environmental and Cellular Factors on the Bioactivity of a Novel Antifungal, Occidiofungin

Occidiofungin is a novel glycolipopeptide, synthesized and secreted by Burkholderia contaminans MS14, demonstrating broad-spectrum antifungal activity and potential for successful clinical applications. Its mechanism of action has not yet been determined but is known to exhibit fungicidal activity via the induction of apoptosis in a manner unique from that of currently approved antifungals. As an early investigation into occidiofungin’s mechanism of action, we aimed to identify environmental and cellular factors that significantly alter the susceptibility of the model organism, Saccharomyces cerevisiae. To that end, we have demonstrated that occidiofungin’s bioactivity requires active cellular growth, that new protein synthesis is necessary to adequately respond to occidiofungin exposure, and that alterations in transcriptional regulation in response to glucose and phosphate deprivation have synergistic and antagonist consequences, respectively, on occidiofungin’s effectiveness. Together, this data provides a foundation on which occidiofungin’s mechanism of action can be illuminated

The Sucking Louse Fauna of Mongolian Rodents: Host Associations, Molecular Phylogenetics and Description of Two New Species

This study aimed to screen Mongolian rodents for sucking lice (Insecta: Phthiraptera: Anoplura) to better understand host-parasite associations for this understudied region. Nine species, including 3 previously undescribed, from 4 genera were identified. A molecular phylogeny based on 2 mitochondrial genes of collected louse specimens is included

Scalar hairy black holes and solitons in asymptotically flat spacetimes

A numerical analysis shows that a class of scalar-tensor theories of gravity with a scalar field minimally and nonminimally coupled to the curvature allows static and spherically symmetric black hole solutions with scalar-field hair in asymptotically flat spacetimes. In the limit when the horizon radius of the black hole tends to zero, regular scalar solitons are found. The asymptotically flat solutions are obtained provided that the scalar potential $V(\phi)$ of the theory is not positive semidefinite and such that its local minimum is also a zero of the potential, the scalar field settling asymptotically at that minimum. The configurations for the minimal coupling case, although unstable under spherically symmetric linear perturbations, are regular and thus can serve as counterexamples to the no-scalar-hair conjecture. For the nonminimal coupling case, the stability will be analyzed in a forthcoming paper.Comment: 7 pages, 10 postscript figures, file tex, new postscript figs. and references added, stability analysis revisite

Bose-Einstein condensation in arbitrarily shaped cavities

We discuss the phenomenon of Bose-Einstein condensation of an ideal non-relativistic Bose gas in an arbitrarily shaped cavity. The influence of the finite extension of the cavity on all thermodynamical quantities, especially on the critical temperature of the system, is considered. We use two main methods which are shown to be equivalent. The first deals with the partition function as a sum over energy levels and uses a Mellin-Barnes integral representation to extract an asymptotic formula. The second method converts the sum over the energy levels to an integral with a suitable density of states factor obtained from spectral analysis. The application to some simple cavities is discussed.Comment: 10 pages, LaTeX, to appear in Physical Review

Bose-Einstein condensation of atomic gases in a harmonic oscillator confining potential trap

We present a model which predicts the temperature of Bose-Einstein condensation in atomic alkali gases and find excellent agreement with recent experimental observations. A system of bosons confined by a harmonic oscillator potential is not characterized by a critical temperature in the same way as an identical system which is not confined. We discuss the problem of Bose-Einstein condensation in an isotropic harmonic oscillator potential analytically and numerically for a range of parameters of relevance to the study of low temperature gases of alkali metals.Comment: 11 pages latex with two postscript figure

Author correction : a global database for metacommunity ecology, integrating species, traits, environment and space

Correction to: Scientific Data https://doi.org/10.1038/s41597-019-0344-7, published online 08 January 202

No-scalar hair conjecture in asymptotic de-Sitter spacetime

We discuss the no-hair conjecture in the presence of a cosmological constant. For the firststep the real scalar field is considered as the matter field and the spacetime is assumed to be static spherically symmetric. If the scalar field is massless or has a convex potential such as a mass term, it is proved that there is no regular black hole solution. For a general positive potential, we search for black hole solutions which support the scalar field with a double well potential, and find them by numerical calculations. The existence of such solutions depends on the values of the vacuum expectation value and the self-coupling constant of the scalar field. When we take the zero horizon radius limit, the solution becomes a boson star like solution which we found before. However new solutions are found to be unstable against the linear perturbation. As a result we can conclude that the no-scalar hair conjecture holds in the case of scalar fields with a convex or double well potential.Comment: 9 pages, 2 Postscript figure

Author correction : a global database for metacommunity ecology, integrating species, traits, environment and space

Correction to: Scientific Data https://doi.org/10.1038/s41597-019-0344-7, published online 08 January 202