412 research outputs found

    S6@uni: A mixed curriculum for school and university

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    Peer reviewedPublisher PD

    Deciphering the role of varying iceberg source in abrupt climate change

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    Heinrich events involve the massive release of icebergs from continental ice sheets into the sub-polar North Atlantic, which travel as far south as 40Ā°N and deposit large quantities of Ice Rafted Debris (IRD) in marine sediments. Determining the distribution of IRD sources across the Atlantic during Heinrich events is a vital step in ascertaining the sequence of iceberg rafting, and the relative involvement of circum-North Atlantic ice sheets in this release of freshwater to the North Atlantic. This study examines evidence from multiple radiogenic isotope (Nd, Sr and Pb) analyses on the detrital clay size fraction (<2Ī¼m), and stable isotopes in the detrital <63 Ī¼m fraction of a Hudson Strait (HS) source (Ī“18O of <-2.5 and ĪµNd of <-19) in the clay and fine fraction deposited at the IRD belt site during Heinrich events. At the north-eastern British margin changes in detrital Ī“18O and Īµd are related to small inputs of HS derived material during H4, however during H2 there is no discernible HS source to the fine fraction this is contrary to previous coarse fraction studies at the site. It is proposed that the dominance of the British and Irish Ice Sheet (BIIS) source at the site during H2 is due to the increasing size of the British Ice sheet over the course of the last glacial. Endmember modelling of particle size distributions demonstrate a coarsening of the silt fraction over the Heinrich events at the IRD belt site. At the margin of the BIIS there is a correspondence between millennial scale IRD events and coarse particle size distributions which is superimposed on increases in the finest endmember over the last glacial in response to the BIIS reaching the shelf edge. Changes in stable isotopes of surface dwelling foraminifera demonstrate that the surface waters were fresher during H2 and H4 coinciding with fine fraction IRD inputs. At the British ice sheet margin, increasing surface water stratification after 27 ka BP coincides with increases in fine particle size endmember and Ī“18O of the fine fraction further indicating the consistent presence of the BIIS at the shelf edge after 27 ka BP

    "Nothing in her bags but two rags": Midwives, Nurses and Public Health Intervention in African American Communities in North Carolina, 1920-1950

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    The period of 1920-40 in North Carolina saw some of the strictest regulation related to midwives in the South. Midwives had been a fundamental part of the birthing process for African American women from very early on in American history into the twentieth century. The progressive health department established in the early part of the century targeted midwives in order to reduce high infant and maternal mortality. The key part of their strategy was the implementation of instruction and supervision through public health nurses. Notably, many of these nurses were African American, and they approached midwife regulation and public health care in a way that addressed not only inadequate systems of care, but the entrenched racism that was present in most aspects of public health intervention

    Internet filtering companies with religious affiliations in the context of Indiana public libraries

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    Since the U.S. Supreme Court decided to uphold the Childrenā€™s Internet Protection Act (CIPA) in 2003, public libraries accepting federal E-rate funds have been required to install technology protection measures on computers with Internet access. Many libraries use Internet filters to fulfill this requirement. Using research by Nancy Willard, which disclosed affiliations between Internet filtering companies and religious organizations, it was found that at least 15.9% of Indiana public libraries used filters with connections to conservative religious groups in 2005. Ethical implications of this research are discussed and recommendations for balancing First Amendment rights with a financial need for CIPA compliance are included

    FYE book project [Slides]

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    Slides from a presentation given at the online NC-BIG instruction round up on July 25, 2018
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