2,003,872 research outputs found
Sociological analysis of the PAGES network
No full textInternational audienceIn 2021, pAGES celebrated 30 years of intense activity building and managing a global scientific network to study past environmental and climate change. For this, pAGES partnered with the Maison des Sciences de l'Homme et de l'Environnemen
Centennial to Millennial Climate Variability
No full textThis issue of Past Global Changes Magazine “Centennial to Millennial Climate Variability" shows how recent progress in our knowledge of past climates led us to revisit our ideas about the spectrum of natural climate variability. Contributions highlight the concept of scaling laws, but also warn about pitfalls of paleoclimate timeseries analysis. It is a product of PAGES' Climate Variability Across Scales (CVAS) working group
A global database of carbon and oxygen isotopes for the last deglaciation
No full textThe PAGES Data Stewardship Scholarship (DSS) contributed towards the completion of the first version of a database of carbon and oxygen isotopes from benthic foraminifera in deep-ocean sediment cores.
The Ocean Circulation and Carbon Cycling (OC3) working group (pastglobalchanges.org/science/wg/former/oc3) started in 2014. OC3 brought together researchers with a scientific question: What global changes can explain variations in ocean carbon and oxygen isotope ratios (δ13C and δ18O) in benthic foraminiferal samples from deep-sediment cores? Of particular interest was the transition between the Last Glacial Maximum (LGM, 23–19 kyr BP) and early last deglaciation (19–15 kyr BP), where a first increase in atmospheric CO2 from glacial values (~180 ppm) is observed in ice-core data (Petit et al. 1999). δ13C from tests of benthic foraminifera in deep-ocean sediment cores is used in paleoceanography as a tracer for past deep-water mass structure (Curry and Oppo 2005). δ18O from the same samples is used as a tracer for deep-water temperatures and δ18O of sea water (Lynch-Stieglitz et al. 1999). Despite relatively large amounts of existing data, the use of stable isotopes in paleoclimate research is hindered by several issues, such as
Mahara - pages and sharing
No full textA PDF guide to creating pages in Mahara and sharing your pgaes with others
R scripts that were created and used for the Bachelor Thesis
No full textThe R Script "Adjust_tables.R" contains information for creating a species list and a table for the geometric parameters. The R Script "Plots_descriptive.R" contains the descriptive analysis and its plots. The R Script "LM_Substrate.R" provides information for creating a Linear Model, its tables and the residual plots. The R Script "Map_Canaries.R" provides information for creating a Map of the Canary Islands. In the R Script "Shannon_Evenness.R" the biodiversity metrics Shannon-Wiener Index (H), Evenness (J) and Species Richness are calculated and a Species Accumulation Curve is plotted for the Bachelor Thesis. In the R Script "Script_BA_MDS_PERMANOVA_NEW.R" contains more analysis for the Bachelor Thesis. In this script, NMDS plots were generated and PERMANOVA and ANOVA were conducted. Moreover, some descriptive statistics for the substrates were conducted.The R Script "Adjust_tables.R" contains information for creating a species list and a table for the geometric parameters. The R Script "Plots_descriptive.R" contains the descriptive analysis and its plots. The R Script "LM_Substrate.R" provides information for creating a Linear Model, its tables and the residual plots. The R Script "Map_Canaries.R" provides information for creating a Map of the Canary Islands. In the R Script "Shannon_Evenness.R" the biodiversity metrics Shannon-Wiener Index (H), Evenness (J) and Species Richness are calculated and a Species Accumulation Curve is plotted for the Bachelor Thesis. In the R Script "Script_BA_MDS_PERMANOVA_NEW.R" contains more analysis for the Bachelor Thesis. In this script, NMDS plots were generated and PERMANOVA and ANOVA were conducted. Moreover, some descriptive statistics for the substrates were conducted
Paisagem e desenvolvimento. A experiencia limiana
No full textTerritorial approach to the Lima Valley case study as a research laboratory and the different studies were being developed
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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
Additional Data that is needed for the R Scripts
No full text1. The dataset "Percentage_Substratum_Quadrats" is needed for the R Scripts "BA_MDS_PERMANOVA_New.R" and "LM_Substrate.R". It contains information about the percent coverage of different substrates in the tide pools. The columns of this dataset are: Tide pool (Survey site), Type of the Tide Pool, Month and Date of the Survey, Side of the Tide Pool (A or B), Quadrat Number, Substrate, Count of Quadrats in which the Substrate was present, Calculated Percentage of the Substrate.
2. The dataset "Coordinates_Area_depth" provides information about the geometric parameters with the following columns: Tide pool (Survey Site), Latitude and Longitude, Length, Width, Depth and Surface Area of the Tide Pool. This dataset is needed for the R Script "Adjust_tables.R".
3. The dataset "Shannon_Evenness_Results" contains information about the Shannon-Wiener Index and Evenness of the Tide Pools for the surveyed months. It was created in the R Script "Shannon_Evenness.R" and it is needed in the R Script "Script_BA_MDS_PERMANOVA_NEW.R"
Raw Data Fish Assemblages
No full textThis dataset contains information about the fish assemblages on Gran Canaria with the following columns: Tide pool (Survey site), Type (Artificial or Natural), Month of the Survey, Date of the Survey, Fish Family, Fish Species, Abundance of Side A of the Tide Pool, Abundance of Side B of the Tide Pool, Total Abundance of both Sides, Users that were present at the Tide Pool at the time of the Survey
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