Logie: an ecclesiastical place-name element in eastern Scotland

No abstract available

Iona in the Kingdom of the Picts: a note

No abstract available

Non-extremal black hole solutions from the c-map

We construct new static, spherically symmetric non-extremal black hole solutions of four-dimensional ${\cal N}=2$ supergravity, using a systematic technique based on dimensional reduction over time (the c-map) and the real formulation of special geometry. For a certain class of models we actually obtain the general solution to the full second order equations of motion, whilst for other classes of models, such as those obtainable by dimensional reduction from five dimensions, heterotic tree-level models, and type-II Calabi-Yau compactifications in the large volume limit a partial set of solutions are found. When considering specifically non-extremal black hole solutions we find that regularity conditions reduce the number of integration constants by one half. Such solutions satisfy a unique set of first order equations, which we identify. Several models are investigated in detail, including examples of non-homogeneous spaces such as the quantum deformed $STU$ model. Though we focus on static, spherically symmetric solutions of ungauged supergravity, the method is adaptable to other types of solutions and to gauged supergravity.Comment: 57 pages. Minor changes to the introduction, typos corrected and references added. Accepted for publication in JHE

On Einstein Algebras and Relativistic Spacetimes

In this paper, we examine the relationship between general relativity and the theory of Einstein algebras. We show that according to a formal criterion for theoretical equivalence recently proposed by Halvorson (2012, 2015) and Weatherall (2015), the two are equivalent theories.Comment: 20 page

Far-infrared signatures and inner hole sizes of protoplanetary discs undergoing inside-out dust dispersal

By means of radiative transfer simulation we study the evolution of the far-infrared colours of protoplanetary discs undergoing inside-out dispersal, often referred to as transition discs. We show that a brightening of the mid and far-infrared emission from these objects is a natural consequence of the removal of the inner disc. Our results can fully explain recent observations of transition discs in the Chamaleon and Lupus star forming regions from the Herschel Gould Belt Survey, which show a higher median for the 70?um (Herschel PACS 1) band of known transition objects compared with primordial discs. Our theoretical results hence support the suggestion that the 70?um band may be a powerful diagnostic for the identification of transition discs from photometry data, provided that the inner hole is larger than tens of AU, depending on spectral type. Furthermore we show that a comparison of photometry in the K , 12?um and 7u0?m bands to model tracks can provide a rough, but quick estimate of the inner hole size of these objects, provided their inclination is below ?85 degrees and the inner hole size is again larger than tens of AU.Comment: 8 pages, figure 4, accepted for MNRA

Cultural Tourism, Commemorative Plaques, and African-Canadian Historiography: Challenging Historical Marginality

Although Black Canadians have participated in the history of Canada since the European invasion, the study of Blacks in Ontario has been a marginalized historical endeavour. Recently the marketing of Black history as a tourist attraction has attempted to bring the African-Canadian experience to the attention of the general public. Commemorative plaques, erected by local historical societies and all three levels of government, including the Ontario Heritage Foundation of the Ontario Ministry of Culture and Tourism, form the backbone of these tours. The absence of plaques pertaining to experiences since the Civil War and the wording and viewpoint of many of the older plaques, however, do not do full justice to Blacks’ role in the history of the province.Même si les Noirs canadiens participent à l’histoire du Canada depuis l’invasion européenne, l’étude de la présence des Noirs en Ontario est demeurée une entreprise historique marginalisée. On a récemment tenté d’intéresser le grand public à l’expérience africo-canadienne en faisant le marketing touristique de l’histoire des Noirs dans certaines régions de l’Ontario. Des plaques commémoratives érigées par des sociétés historiques locales et les trois paliers de gouvernement, dont la Fondation du patrimoine ontarien, un organisme relevant du ministère de la Culture et du Tourisme de l’Ontario, sont la pierre angulaire de ces circuits. L’absence de plaques relatives à l’expérience des Noirs de l’Ontario depuis la guerre de Sécession de même que les messages et points de vue figurant sur bon nombre des plus vieilles plaques ne rendent toutefois pas justice au rôle des Noirs dans l’histoire de la province

Autism-associated SNPs in the clock genes _npas2_, _per1_ and the homeobox gene _en2_ alter DNA sequences that show characteristics of microRNA genes.

Intronic single nucleotide polymorphisms (SNPs) in the clock genes _npas2_ and _per1_ and the homeobox gene _en2_ are reported to be associated with autism. This bioinformatics analysis of the intronic regions which contain the autism-associated SNPs rs1861972 and rs1861973 in _en2_, rs1811399 in _npas2_, and rs885747 in _per1_, shows that these regions encode RNA transcripts with predicted structural characteristics of microRNAs. These microRNA-like structures are disrupted _in silico_ by the presence of the autism enriched alleles of rs1861972, rs1861973, rs1811399 and rs885747 specifically, as compared with the minor alleles of these SNPs. The predicted gene targets of these microRNA-like structures include genes reported to be implicated in autism (_gabrb3_, _shank3_) and genes causative of diseases co-morbid with autism (_mecp2_ and _rai1_). The inheritance of the AC haplotype of rs1861972 - rs1861973 in _en2_, the C allele of rs1811399 in _npas2_, and the C allele of rs1234747 in _per1_ may contribute to the causes of autism by affecting microRNA genes that are co-expressed along with the homeobox gene _en2_ and the circadian genes _npas2_ and _per1_

Titan

The following topics are discussed with respect to Titan: observations of the atmosphere; laboratory simulations and theoretical models of Titan's atmosphere; endpoints of atmospheric chemistry - aerosols and oceans; exobiology; and the next steps in understanding Titan