2,381 research outputs found
Local competition and metapopulation processes drive long-term seagrass-epiphyte population dynamics
No full textIt is well known that ecological processes such as population regulation and natural enemy interactions potentially occur over a range of spatial scales, and there is a substantial body of literature developing theoretical understanding of the interplay between these processes. However, there are comparatively few studies quantifying the long-term effects of spatial scaling in natural ecosystems. A key challenge is that trophic complexity in real-world biological communities quickly obscures the signal from a focal process. Seagrass meadows provide an excellent opportunity in this respect: in many instances, seagrasses effectively form extensive natural monocultures, in which hypotheses about endogenous dynamics can be formulated and tested. We present amongst the longest unbroken, spatially explict time series of seagrass abundance published to date. Data include annual measures of shoot density, total above-ground abundance, and associated epiphyte cover from five Zostera marina meadows distributed around the Isles of Scilly, UK, from 1996 to 2011. We explore empirical patterns at the local and metapopulation scale using standard time series analysis and develop a simple population dynamic model, testing the hypothesis that both local and metapopulation scale feedback processes are important. We find little evidence of an interaction between scales in seagrass dynamics but that both scales contribute approximately equally to observed local epiphyte abundance. By quantifying the long-term dynamics of seagrass-epiphyte interactions we show how measures of density and extent are both important in establishing baseline information relevant to predicting responses to environmental change and developing management plans. We hope that this study complements existing mechanistic studies of physiology, genetics and productivity in seagrass, whilst highlighting the potential of seagrass as a model ecosystem. More generally, this study provides a rare opportunity to test some of the predictions of ecological theory in a natural ecosystem of global conservation and economic val
A chart of part of the south coast of Newfoundland [cartographic material] : includingthe islands St. Peters and Miquelon, from an actual survey /
No full textDetailed chart of part of the Newfoundland, Canadian coast with relief shown by hachures and bathymetric soundings.; "Scale to the general chart English and French leagues 20 to a degree"; Accompanied by booklet: Directions for navigating on part of the south coast of Newfoundland, with a chart thereof, including the islands of St. Peter's and Miquelon ... / by James Cook. London : Printed for the author, and sold by J.Mount and T. Page on Tower-Hill, 1766. 32 p. : 24 cm.; Insets: Harbours of St. Laurence; Harbour [of] Briton.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-rm423
Where Participatory Approaches Meet Pragmatism in Funded (Health) Research: The Challenge of Finding Meaningful Spaces
No full textThe term participatory research is now widely used as a way of categorising research that has moved beyond researching "on" to researching "with" participants. This paper draws attention to some confusions that lie behind such categorisation and the potential impact of those confusions on qualitative participatory research in practice. It illuminates some of the negative effects of "fitting in" to spaces devised by other types of research and highlights the importance of forging spaces for presenting participatory research designs that suit a discursive approach and that allow the quality and impact of such research to be recognised. The main contention is that the adoption of a variety of approaches and purposes is part of the strength of participatory research but that to date the paradigm has not been sufficiently articulated. Clarifying the unifying features of the participatory paradigm and shaping appropriate ways for critique could support the embedding of participatory research into research environments, funding schemes and administration in a way that better reflects the nature and purpose of authentic involvement
Xystodesmidae Cook 1895
No full textFamily Xystodesmidae Cook, 1895 <p> <b>Subfamily Xystodesminae Cook, 1895</b></p> <p> <b>Tribe Xystocheirini Hoffman, 1980</b></p> <p> Hoffman (1999) mistakenly attributed tribal authorship to Cook without a date, perhaps because he confused this name with Xystodesmidae /inae, which Cook (1895) did author, or because Cook (1904) subsequently authored the genus. However, the first usage of <i>Xystocheir</i> at the family-group level was by Hoffman (1980), as he then noted, and authorship is properly attributed to him.</p>Published as part of <i>Shelley, Rowland M., Smith, Jamie M. & Ross, Deren J., 2014, Variation and pigmentation in the milliped, Xystocheir brachymacris Shelley, 1996, from the northern Sierra Nevada foothills, California, USA (Polydesmida: Xystodesmidae: Xystocheirini), pp. 1-6 in Insecta Mundi 2014 (371)</i> on page 2, DOI: <a href="http://zenodo.org/record/5179327">10.5281/zenodo.5179327</a>
COOK, George
No full textTitle: Papers, 1855-1931 Description: .5 linear ft.
Notes: Author, educator. Includes correspondence, manuscripts, addresses, biographical sketches, memorials, photographs, a scrapbook and a song composed by William Weston Patton, President of Howard University. Gift, 1958.
Subjects: Business; Education; Washington (DC). Childers, Lulu V. Du Bois, W. E. B. (William Edward Burghardt), 1868-1963; As correspondent Funeral rites and ceremonies; Cook, George William Howard University; Administration Howard University; Faculty; Cook, George William Howard University; Presidents; Patton, William Weston Howard University; Students; Cook, George William Howard University, Washington (DC); Faculty members\u27 papers Howard University, Washington (DC); School of Commerce and Finance Patton, William Weston Roosevelt, Theodore, 1858-1919; As correspondent Spingarn, J. E. (Joel Elias), 1875-1939 Tunnell, W. V. White, Walter F. (Walter Francis), 1893-1955; As correspondent Wilkinson, F. D. Woodson, Carter G. (Carter Godwin), 1875-1950
Location: Howard University, Moorland-Spingarn Research Center (Washington, DC) NIDS Fiche #: 4.72.22 NUCMC Number: MS 83-122
Adaptive sampling in two-phase designs: a biomarker study for progression in arthritis
No full textResponse‐dependent two‐phase designs are used increasingly often in epidemiological studies to ensure sampling strategies offer good statistical efficiency while working within resource constraints. Optimal response‐dependent two‐phase designs are difficult to implement, however, as they require specification of unknown parameters. We propose adaptive two‐phase designs that exploit information from an internal pilot study to approximate the optimal sampling scheme for an analysis based on mean score estimating equations. The frequency properties of estimators arising from this design are assessed through simulation, and they are shown to be similar to those from optimal designs. The design procedure is then illustrated through application to a motivating biomarker study in an ongoing rheumatology research program.
This is the peer-reviewed version of the following article: McIsaac, M. A., & Cook, R. J. (2015). Adaptive sampling in two-phase designs: a biomarker study for progression in arthritis. Statistics In Medicine, 34(21), 2899-2912. doi:10.1002/sim.6523, which has been published in final form at https://doi.org/10.1002/sim.6523. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Version
The flirt, polka characteristique
No full textMis E.H. of Baltimore; Miss M.W. of Phila.; Miss P.W.M. of New Orleans; Miss A.L. of Boston; Miss L.P. of New YorkJohns Hopkins University, Levy Sheet Music Collection, Box
100, Item 083Cover is duplicated in 100.085.
Music is duplicated in 100.085.pianopolkaCover is duplicated in 100.080.
Music is duplicated in 100.080.Lith. of Sarony Major & Knapp N.Y.Composed by T.J. Cook, "author of the popular Three & Four Bell's [sic] Polka's [sic].
The flirt, polka characteristique
No full textMis E.H. of Baltimore; Miss M.W. of Phila.; Miss P.W.M. of New Orleans; Miss A.L. of Boston; Miss L.P. of New YorkJohns Hopkins University, Levy Sheet Music Collection, Box
100, Item 083Cover is duplicated in 100.085.
Music is duplicated in 100.085.pianopolkaCover is duplicated in 100.080.
Music is duplicated in 100.080.Lith. of Sarony Major & Knapp N.Y.Composed by T.J. Cook, "author of the popular Three & Four Bell's [sic] Polka's [sic].
Five belles polka
No full textMis E.H. of Baltimore; Miss M.W. of Phila.; Miss P.W.M. of New Orleans; Miss A.L. of Boston; Miss L.P. of New YorkJohns Hopkins University, Levy Sheet Music Collection, Box
100, Item 082Cover is duplicated in 100.085.
Music is duplicated in 100.085.pianopolkaCover is duplicated in 100.080.
Music is duplicated in 100.080.Lith. of Sarony Major & Knapp N.Y.Composed by T.J. Cook, "author of the popular Three & Four Bell's [sic] Polka's [sic].
Five belles polka
No full textMis E.H. of Baltimore; Miss M.W. of Phila.; Miss P.W.M. of New Orleans; Miss A.L. of Boston; Miss L.P. of New YorkJohns Hopkins University, Levy Sheet Music Collection, Box
100, Item 082Cover is duplicated in 100.085.
Music is duplicated in 100.085.pianopolkaCover is duplicated in 100.080.
Music is duplicated in 100.080.Lith. of Sarony Major & Knapp N.Y.Composed by T.J. Cook, "author of the popular Three & Four Bell's [sic] Polka's [sic].
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