2,802 research outputs found
Behavioural rhythms of two amphipod species Marinogammarus marinus and Gammarus pulex under increasing levels of light at night
No full textArtificial light at night (ALAN) is proliferating at an alarming rate across the globe, particularly around aquatic habitats. Natural and predictable light cycles dictate much of an individual organism’s life by acting as a major signal for their circadian clock, driving rhythmic behaviours and physiological changes throughout the body. Light cycles also help populations coordinate group behaviour and greatly impact the interspecies dynamics of a community. Research into the ecological impacts of ALAN has highlighted numerous effects on these biological processes, including higher predation rates, impaired growth and development, and diminished reproductive success. Making up the vast majority of species, invertebrates play an undeniable role in ecosystem functioning. Many species have been shown to have robust daily rhythms. As such, it is vital to understand how ALAN may disrupt their behavioural patterns. The aim of this study was to monitor the impacts of increasing levels of light at night (0 lux – 80 lux), as well as constant light and constant darkness, on the behavioural rhythms of the intertidal amphipod, Marinogammarus marinus, and the freshwater species, Gammarus pulex. Gammarus pulex activity was not strongly synchronised to any of the light at night treatments. Marinogammarus marinus, however, exhibited strong behavioural rhythmicity in diurnal cycles with dark night periods. All the ALAN treatments resulted in a significant decrease in M. marinus rhythmicity and overall activity. Moreover, ALAN between 1 – 50 lux disrupted nocturnality in this species. These results indicate that while some gammarids show some adaptive plasticity when it comes to light pollution, others may experience strong direct impacts on their activity. This may be relevant to individual and population level fitness of vulnerable species in more heavily urbanised areas
Writing and the rights of reality: usurpation and potentiality in Derrida, Plato, Nietzsche, and Beckett
No full textThe thesis critically evaluates Jacques Derrida's conferral of the rights of reality on writing, focussing on his theory of an arche-text in light of the speculative nature of this theory. The theory is initially considered in the context of Derrida's elucidation of the usurpatory status of writing within the Platonic and Nietzschean texts. This consideration reveals an admission of writing's usurpatory status by both writers while at the same time demonstrating their awareness of the intrinsically speculative nature of this view, the significance of writing lying in its ability to exteriorise the radically indeterminate status of consciousness m relation to reality rather than its ability to displace consciousness or reality The analyses, therefore, not only bring the Derridean hypothesis of a repressive or phonocentric metaphysical episteme into question but also exhibit the historical and philosophical role of potentiality in relation to writing, writing's ultimate significance lying in its capacity to exteriorise our existence as a mode of potentiality. Accordingly, in the second half of the thesis the Derridean theory of writing is countered with a specifically Aristotelian theory of the text as it is exhibited in the prose of Samuel Beckett, an author whose significance lies in his close alignment with Derridean theory within contemporary criticism. It is demonstrated that this identification has obviated an awareness of the significance of potentiality within the Beckettian text, his work consequently being appraised in the previously neglected context of Aristotelian metaphysics
Correspondence between Zelma C. Wyche, William H. Samuel and Vernon Jordan, 1968
No full textCorrespondence from Zelma C. Wyche to William H. Samuel proposing a voter education program to take advantage of a Black majority voting population. William H. Samuel' correspondence to Vernon Jordan endorses the proposal to Vernon Jordan citing an important upcoming election and the fact no Black person had held office at the time of correspondence
A Letter from Samuel B. Schieffelin to A. C. Van Raalte
No full textA letter from Samuel B. Schieffelin to A.C.V.R. regarding property matters. Schieffelin seems to have a high regard for Van Raalte. The author also makes some medicinal recommendations for A.C.V.R.\u27s health problems.https://digitalcommons.hope.edu/vrp_1850s/1367/thumbnail.jp
The effect of maternal nutrition on the epigenetic regulation by DNA methylation of hepatic genes involved in glucose and fat metabolism in the offspring
No full textUsability and acceptability of a website that provides tailored advice on falls prevention activities for older people
No full textThis article presents the usability and acceptability of a website that provides older people with tailored advice to help motivate them to undertake physical activities that prevent falls. Views on the website from interviews with 16 older people and 26 sheltered housing wardens were analysed thematically. The website was well received with only one usability difficulty with the action plan calendar. The older people selected balance training activities out of interest or enjoyment, and appeared to carefully add them into their current routine. The wardens were motivated to promote the website to their residents, particularly those who owned a computer, had balance problems, or were physically active. However, the participants noted that currently a minority of older people use the Internet. Also, some older people underestimated how much activity was enough to improve balance, and others perceived themselves as too old for the activities
Richardson, Barbauld, and the construction of an early modern fan club
No full textMPhilMuch has been written about the life and long works of the eighteenth century epistolary novelist, Samuel Richardson, but the prospect of his position as the first celebrity novelist – responsible for courting his own fame as well as initiating his own fan club – has largely been ignored. The body of manuscripts housed at the National Art Library in the Victoria and Albert Museum in London provides the modern scholar with evidence of the skeletal beginnings of an early fan club. This thesis aims to show how these manuscripts were turned into a saleable commodity by the publisher and entrepreneur Richard Phillips, while under the guiding hand of another, slightly later, literary celebrity, Anna Laetitia Barbauld. In order to restore Richardson’s reputation amongst a new nineteenth century audience, Barbauld was required to construct her own idea of him as an eighteenth century celebrity author, and in doing so the insecurities of a self-professed, apparently diffident man, are revealed. Barbauld’s capacious, but heavily edited selection of letters is analyzed in this thesis, providing ample evidence that Richardson’s correspondents were more than just eager letter writers. By using Barbauld’s biography of Richardson this thesis aims to show how she manipulates the genre of life writing in her construction of him.
This thesis offers an alternative reading of how the Richardson manuscripts are viewed, redefining them as not simply a collection of letters, but as a collective entity, deliberately selected and archived as evidence of an early modern fan club, and its celebrity managing director
Tables of correct and concise logarithms; for numbers, sines, tangents, secants, complements-arithmetical supplements, &c. ...
No full textby Samuel Dun
Ohio impromptu, genre and Beckett on film
No full textSamuel Beckett’s choice of the title Ohio Impromptu to name the play first performed to an audience of academics and scholars at Columbus Ohio in 1981 is one manifestation of its author’s interest in the question of literary genre; more generally, in Beckett’s dramatic works one encounters a meticulous attention to the activity of categorisation, even if the energy is often directed toward the creation of phantom genres for spectral exemplars. This essay concerns itself with Ohio Impromptu in particular because by means of elements specific to this play (including the context in which it was first performed) it comments upon its own very failure to occupy its designated genre co-ordinates (these include its identity both as a play and as an ‘impromptu’). This play, which is so apt to incorporate other genres, however, is presided over by a stage direction which locates it firmly in the theatrical context. It is in its deliberate failure to attend to this stage direction that the Beckett on Film version of the play goes beyond the mere treacherous fidelity that is inevitably a feature of any adaptation. In arguing this, the essay analyses the foregrounding in the play of questions that can be said to pertain to genre (in several senses). Its more specific intention is to suggest that, via a combination of casting and special effects, the adaptation succeeds not only in cancelling the critical reflection on the ‘genre gesture’ that is lodged in Ohio Impromptu, but also in eradicating the very disjunction between Reader and Listener upon which the play depends
FIGURE 1. Parapharyngodon silvoi n in A new species of Parapharyngodon (Nematoda: Pharyngodonidae) infecting Dermatonotus muelleri (Anura: Microhylidae) from Caatinga, Northeastern Brazil
No full textFIGURE 1. Parapharyngodon silvoi n. sp. (A) male, entire and ventral view. (B) female, entire ventral view. (C) male, posterior end, ventral view. (D) excretory pore. (E) female, anterior end, en face view. (F) copulatory spicule. (G) female egg.Published as part of De Araujo Filho, João A., Brito, Samuel V., Almeida, Waltécio De O., Morais, Drausio H. & Ávila, Robson W., 2015, A new species of Parapharyngodon (Nematoda: Pharyngodonidae) infecting Dermatonotus muelleri (Anura: Microhylidae) from Caatinga, Northeastern Brazil, pp. 386-390 in Zootaxa 4012 (2) on page 388, DOI: 10.11646/zootaxa.4012.2.10, http://zenodo.org/record/23624
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