115,714 research outputs found
14) GIUSTINO A., CUOMO V., MARSDEN C.A., Maternal cocaine exposure alters mesolimbic dopaminergic function in rat offspring. Eur. J. Pharmacol. 345, 175-180, 1998
No full text
Comets of the Marsden and Kracht groups
No full textPerihelion distances of Marsden and Kracht group comets fall into the range 6RS < q < 12RS (the Meyer group comets also share the same perihelion interval). It is by several folds larger than the perihelion distance of the Kreutz group comets (q < 2RS). Average circulation period for comets of the Marsden group is P = 5.5 years and for the Kracht group is P =5.3 years. The Marsden and Kracht group comets share the same origin; as well as 96P (Machholz), object 196256 (2003 EH1), meteor showers the Daytime Arietids, Northern and Southern δ Aquariids, Quandrantids forming the Machholz interplanetary complex. This work offers computational movement simulation for comet-progenitor fragments. It is shown that the orbits of the representatives of the complex can be explained if the decay of the cometprogenitor for objects 96P and 196256 occurred ~9500 years ago. The following evolution direction has been demonstrated for the complex objects: progenitor comet - comet 96P - the Marsden group comets - the Kracht group comets - the Southern δ Aquariids. However, not all the complex objects will necessarily pass through every stage of the above as it can be preceded by the total disintegration of the object
Aspects of the breeding biology of the Kittiwake gull Rissa tridactyla at Marsden Bay, Tyne and Wear
No full textAlthough much research has been undertaken into the status and biology of the Kittiwake Rissa tridactyla studies of a colony over an extended period are scarce with the notable exception of the North Shields colony for which 31 years of data were summarized by Coulson and Thomas (1985). The nearby colony at Marsden Bay, Tyne and Wear had however been the focus of study in the 1950s (Coulson and White 1956) and the 1970s (Dixon 1979). It was considered that a similar study in the early 1990s could be usefully combined with a review of data from these two previous periods. Since the colony's formation in 1931 the nest count has increased from 308 in 1937 to 5768 in 1992. After rapid and steady growth through the 1940s and 1950s a period of relative stability occurred in the 1970s with about 4,600 nests present. In the last 15 years numbers have again risen substantially. Continuing changes in the cliff structure due to erosion are affecting the availability of nest sites and hence the number of nests. Changes in the breeding biology have resulted in the Kittiwakes spending less time at the colony each year. Their later arrival in the spring has had little effect on the mean date of laying perhaps due to a more synchronised arrival of the colony. Evening departure by birds from the colony in the pre-breeding period was found to be related to the time the birds arrived in the colony in the spring and their subsequent attendance on the nest site. Chick growth rates were slightly lower than in the 1950s and 1970s at North Shields, and chick neglect was frequent in 1992. However these factors did not appear to influence the fledging success
author-bios-SRD-19-0063.R1 – Supplemental material for The Network Structure of Police Misconduct
No full textSupplemental material, author-bios-SRD-19-0063.R1 for The Network Structure of Police Misconduct by George Wood, Daria Roithmayr and Andrew V. Papachristos in Socius</p
The effects of stellar winds on the magnetospheres and potential habitability of exoplanets
No full textV.S. acknowledges the support of an STFC studentship. A.A.V. acknowledges support from a Royal Astronomical Society Fellowship and an Ambizione Fellowship from the Swiss National Science Foundation. S.V.J. acknowledges research funding by the Deutsche Forschungsgemeinschaft (DFG) under grant SFB 963/1, project A16.Context. The principle definition of habitability for exoplanets is whether they can sustain liquid water on their surfaces, i.e. that they orbit within the habitable zone. However, the planet’s magnetosphere should also be considered, since without it, an exoplanet’s atmosphere may be eroded away by stellar winds.Aims. The aim of this paper is to investigate magnetospheric protection of a planet from the effects of stellar winds from solar-mass stars.Methods. We study hypothetical Earth-like exoplanets orbiting in the host star’s habitable zone for a sample of 124 solar-mass stars. These are targets that have been observed by the Bcool Collaboration. Using two wind models, we calculate the magnetospheric extent of each exoplanet. These wind models are computationally inexpensive and allow the community to quickly estimate the magnetospheric size of magnetised Earth-analogues orbiting cool stars.Results. Most of the simulated planets in our sample can maintain a magnetosphere of ~5 Earth radii or larger. This suggests that magnetised Earth analogues in the habitable zones of solar analogues are able to protect their atmospheres and is in contrast to planets around young active M dwarfs. In general, we find that Earth-analogues around solar-type stars, of age 1.5 Gyr or older, can maintain at least a Paleoarchean Earth sized magnetosphere. Our results indicate that planets around 0.6–0.8 solar-mass stars on the low activity side of the Vaughan-Preston gap are the optimum observing targets for habitable Earth analogues.Peer reviewe
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Reintegrating Extremists ::Deradicalisation and Desistance /
No full textThis book presents an in-depth analysis of how statutory and third sector organisations have faced the challenge of dealing with former 'terrorists'. Offering a theoretically robust, empirically rich account of work with ex-prisoners and those considered 'at risk' of involvement in extremism in the United Kingdom, Marsden dissects the problems governments are facing in dealing with the effects of 'radicalisation'. Increasingly, governments are struggling with the challenge of dealing with those who have become involved in extremism, and yet, comparatively little is known about how and why people renounce violence. Nor are existing efforts to 'deradicalise' extremists well understood. Arguing that reintegration is a more appropriate framework than 'deradicalisation', Marsden looks in detail at the mechanisms by which people can be supported to move away from extremism. By drawing out implications for policy, practice and academic debates around disengagement from radical subcultures, this book makes a significant contribution to an issue only likely to grow in importance for scholars of criminological theory, terrorism and justice. Sarah Marsden is a Lecturer in the Department of Politics, Philosophy and Religion at Lancaster University, UK
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
