11,035 research outputs found
Untitled Sermon on Exodus 1:8-2:10
No full textSermon by the Rev. Dr. David Rowe delivered on August 26, 2020 for a virtual weekly chapel service held via Zoom. Digital video recording (MP4). Duration: 13 minutes, 37 seconds
Rynkatorpa Rowe and Pawson 1967
No full textGenus <i>Rynkatorpa</i> Rowe and Pawson, 1967 <p> <b>Diagnosis</b>: Anchor plates more or less irregular in outline, tending to be rectangular, with small number of perforations (25–50), of which two near center line are usually conspicuously larger than the rest; perforations with smooth to spinous margins. One to three Polian vesicles. (After Rowe and Pawson, 1967).</p> <p> <b>Type Species</b>: <i>Rynkatorpa hickmani</i> Rowe and Pawson, 1967</p> <p> <b>Remarks:</b> Rowe and Pawson (1967) listed eight Indo­Pacific species in this genus. Since 1967, three further Indo­Pacific species have been described: <i>R. pawsoni</i> (Martin, 1969a, 1969b), <i>R. gibbsi</i> (Rowe, 1977), and <i>R. coriolisi</i> (Smirnov, 1997). Of the 11 species now known in the genus, four, <i>hickmani</i> Rowe & Pawson, <i>bisperforatus</i> (Clark), <i>gibbsi</i> Rowe, and <i>uncinata</i> (Hutton) are essentially shallow­water forms, known from less than 100 meters depth. The other seven species, <i>bicornis</i> (Sluiter), <i>sluiteri</i> (Fisher), <i>timida</i> (Koehler & Vaney), <i>challengeri</i> (Théel), <i>coriolisi</i> Smirnov, <i>pawsoni</i> Martin, and <i>duodactyla</i> (Clark) are bathyal forms, ranging in depth from 252 to 1,920 meters. It is indeed surprising to find this genus in the Atlantic. Its nearest congeneric neighbors are <i>R. pawsoni</i> and <i>R. duodactyla</i> (Clark); both occur off the west coast of North America, and both differ from <i>R. felderi</i> new species in possessing just one pair of terminal tentacle digits.</p>Published as part of <i>Pawson, David L. & Vance, Doris J., 2005, Rynkatorpa felderi, new species, from a bathyal hydrocarbon seep in the northern Gulf of Mexico (Echinodermata: Holothuroidea: Apodida), pp. 15-20 in Zootaxa 1050</i> on page 16, DOI: <a href="http://zenodo.org/record/169978">10.5281/zenodo.169978</a>
An Interview with Tony David Sampson: Author of Virality: Contagion Theory in the Age of Networks
No full textTony D. Sampson is Reader in Digital Culture and Communication in the School of Arts and Digital Industries (ADI) at the University of East London, where he directs the EmotionUX lab, supervising research on the cognitive, emotional, and affective aspects of user experience. In 2013, he co-founded Club Critical Theory, an organization dedicated to the application of critical theory in everyday life in Southend-on-Sea, Essex. Tony is the author of Virality: Contagion Theory in the Age of Networks and The Assemblage Brain: Sense Making in Neuroculture, both from the University of Minnesota Press. He blogs at viralcontagion.wordpress.com.
The editors of this special NANO issue are delighted to have the opportunity to talk with Tony about how his work touches on issues of imitation and contagion—a loaded term unpacked within his 2012 book
David Gregory
No full textPhotograph - David Gregory, member of the Book Sub-Committee, part of the Town of Athabasca 75th Anniversary Committee, Athabasca, Alberta. The Book Sub Committee produced the book "Athabasca Landing: An Illustrated History
Plasmodium falciparum:Rosettes do not protect merozoites from invasion-inhibitory antibodies
No full textRosetting is a parasite adhesion phenotype associated with severe malaria in African children. Why parasites form rosettes is unknown, although enhanced invasion or immune evasion have been suggested as possible functions. Previous work showed that rosetting does not enhance parasite invasion under standard in vitro conditions. We hypothesised that rosetting might promote invasion in the presence of host invasion-inhibitory antibodies, by allowing merozoites direct entry into the erythrocytes in the rosette and so minimising exposure to plasma antibodies. We therefore investigated whether rosetting influences invasion in the presence of invasion-inhibitory antibodies to MSP-1. We found no difference in invasion rates between isogenic rosetting and non-rosetting lines from two parasite strains, R29 and TM284, in the presence of MSP-1 antibodies (P = 0.62 and P = 0.63, Student's t test, TM284 and R29, respectively). These results do not support the hypothesis that rosettes protect merozoites from inhibitory antibodies during invasion. The biological function of rosetting remains unknown
Radiocarbon determinations on Chillagoe rock paintings: small sample accelerator mass spectrometry
No full textFigure 1. Map of northeastern Australia (Queensland) including the Chillagoe region.Published as part of Armitage, R. A., David, B., Hyman, Libbie H., Rowe, M. W., Tuniz, C., Lawson, E., Jacobsen, G. & Hua, Q., 1998, Radiocarbon determinations on Chillagoe rock paintings: small sample accelerator mass spectrometry, pp. 285-292 in Records of the Australian Museum 50 (3) on page 287, DOI: 10.3853/j.0067-1975.50.1998.1287, http://zenodo.org/record/465313
David Audretsch: A Source of Inspiration, a Co-author, and a Friend
No full textIn this chapter, Enrico Santarelli discusses the profound impact that David had on his career. Beginning with a conference in Budapest, Santarelli and David bocame close friends and colleagues. They went on to collaborate on many papers and projects, several of which Santarelli highlights below
Cultural Leadership and Peace: An Educational Response to Religious Violence
No full textABSTRACT CULTURAL LEADERSHIP AND PEACE: AN EDUCATIONAL RESPONSE TO RELIGIOUS VIOLENCE by B. David Rowe This study is a philosophical inquiry into violence as the consequence of dysfunctional meaning-making processes. It establishes a theory of leadership development which requires, catalyzes, and sustains a reinvigorated relationship between education and religion in order to create more pacific ways of making meaning on interpersonal, organizational, institutional, societal, and global levels. The inquiry articulates an understanding of leadership as drawing on educative and religious processes for the deployment of power in order to make meaning with or on behalf of groups of people at various levels of social complexity. The analysis demonstrates that leadership is informed by and can inform institutional patterns of behavior and signification. Examination of leadership style on a developmental continuum of more and less violent modes of deploying power simultaneously offers insight into the origin of violent social relationships and into a process for creating more pacific ways of making meaning. Therefore, providing a path of personal cognitive and moral development along this continuum for organizational, institutional, societal, and global leaders offers one approach to influencing the development of social institutions which, in turn, influence the development of other leaders, along a mutually formative path toward interpersonal and global peace. The examination of leadership as energy deployment for the purpose of making meaning offers an opportunity to consider religion as an institution which encodes meaning making processes for society and individuals alike and to consider education as an institution which encodes behavior and norms attendant to the explication of reality. Rehabilitating religion and education in order to play these respective social roles more effectively requires more sophisticated leaders who deploy energy in less violent ways. Conversely, leadership development is constrained and empowered by these institutions which are in need of such growth themselves. This philosophical inquiry, therefore, synthesizes a new theory capable of framing new questions for leadership development and institutional growth with personal, organizational, societal, and global implications. The theory creates the category of Cultural Leadership which becomes a model for making meaning in less violent ways while providing a pathway for personal and social growth toward sustainable peace
Heme b in marine cyanobacteria and the (sub-) tropical North Atlantic
No full textHeme b is the iron containing prosthetic group to an important pool of iron proteins known as the hemoproteins. Hemoproteins are functionally diverse, playing key roles in photosynthetic and respiratory electron transfer (e.g. cytochrome b6f, photosystem II, cytochrome bc1) among other fundamental biological processes. Heme b is the most naturally abundant heme structure, but data regarding hemes in the marine environment are limited. An investigation has been conducted to improve our understanding of heme b abundance in marine organisms through laboratory monoculture studies of three marine cyanobacteria grown under varying total iron concentration. The unicellular cyanobacteria Synechococcus sp. WH7803 was examined under three total iron concentrations: 12 nmol L-1 (low), 120 nmol L-1 (medium) and 1200 nmol L-1 (high). The marine diazotrophs (i.e. nitrogen fixers) Crocosphaera watsonii (WH8501) and Trichodesmium erythraeum (IMS101) were studied under six total iron concentrations between 0 and 120 nmol L-1. Cultures were analysed for heme b, chlorophyll a, particulate organic carbon (POC) and particulate organic nitrogen (PON) concentration. Nitrogen fixation rates and biophysical measurements (Fv/Fm and ?PSII) were also obtained for diazotroph cultures. Field data regarding the concentration of heme b, chlorophyll a, POC and PON as well as nitrogen fixation rates were collected during two research cruises in the subtropical North Atlantic (STNA, D346) and tropical North Atlantic (TNA, D361); an oceanographic region known to demonstrate high nitrogen fixation rates and receive significant dust (iron) deposition from the Saharan and Sahel deserts of Western Africa.Cultures of Synechococcus sp. WH7803 showed evidence of iron stress at low iron treatments via reduced maximum growth rates (?max), total biovolume and chlorophyll a concentration. This was also reflected by a significant reduction in cellular heme b content per unit carbon (heme:C) at the lowest iron concentration. An estimated heme b requirement between 1.0 and 1.5 ?mol mol-1 C is proposed for Synechococcus sp. WH7803 in order to facilitate ?max. Chlorophyll a to heme b ratios (chl:heme) were significantly decreased in low iron cultures of Synechococcus sp. WH7803, suggesting b-type hemoproteins were conserved when iron stressed. Cultures of Crocosphaera and Trichodesmium were similarly influenced by the availability of iron, with reduced total biovolume and chlorophyll a concentration reported at low iron treatments. However, heme:C ratios were maintained at approximately 1.5 and 0.5 ?mol mol-1 C for Crocosphaera and Trichodesmium cultures, respectively. A high iron requirement is associated with marine diazotrophs relating to the iron-rich non-heme nitrogenase enzyme complex responsible for nitrogen fixation. Nitrogen fixation rates increased as total iron concentration increased, with Trichodesmium demonstrating four-fold higher rates than Crocosphaera at corresponding iron concentrations. It has been suggested that relatively low heme b contents of Trichodesmium cultures resulted from increased nitrogen fixation activity. Furthermore, heme:C ratios of Crocosphaera and Trichodesmium were typically lower than five eukaryotic phytoplankton previously investigated, potentially related to the allocation of iron for nitrogen fixation. Mean heme:C ratios from cruises in the STNA and TNA were 0.64 and 0.66 ?mol mol-1 C, respectively. Results could imply the region was iron stressed and/or dominated by cyanobacteria. Evidence is also presented suggesting a possible inverse relationship between nitrogen fixation and heme:C ratio in the TNA which could be attributed to natural populations of Trichodesmium
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