2,021 research outputs found

    Nathaniel Greene to Unknown and Robert Morris to Nathaniel Greene, September 11, 1782

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    Robert Morris wrote from the Office of Finance to Nathaniel Greene, address not included. Included on the first page of the letter is an extract from a letter from Nathaniel Greene to an Unknown Person dated August 13, 1782. Both letters discussed the cost of rations and supplies for the military and whether they could be bought at better prices for cash. Greene\u27s letter mentioned ravishes done on Georgia. Both also mentioned previous letters sent to George Abbott Hall.https://digitalcommons.kean.edu/lhc_1780s/1080/thumbnail.jp

    Jacques-Bernard Brunius, pionnier du film de montage

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    Des sept films documentaires rĂ©alisĂ©s par Jacques-Bernard Brunius dans les annĂ©es 1930, seul Violons d’Ingres (1939) a fait l’objet d’une certaine attention parmi les historiens du cinĂ©ma. Un regard documentĂ© sur l’histoire de ses autres films de la dĂ©cennie nous rĂ©vĂšle un cinĂ©aste original, poursuivant certaines pistes balisĂ©es par les documentaristes d’avant-garde de la fin de l’époque muet – notamment le film de montage – tout en cherchant Ă  faire Ă©voluer le genre Ă  l’heure du parlant. Une attention particuliĂšre est portĂ©e Ă  Autour d’une Ă©vasion (1934), hĂ©ritĂ© en partie d’un projet non-abouti de Jean Vigo et Records 37 (1937), commandĂ© pour l’Exposition internationale de Paris mais distribuĂ© ensuite en salles avec la Grande Illusion de Renoir, en passant par son travail de montage sur la Vie est Ă  nous (1936) du mĂȘme cinĂ©aste. En conclusion est considĂ©rĂ©e sa postĂ©ritĂ© Ă  travers l’influence qu’il a pu avoir sur la gĂ©nĂ©ration des documentaristes français d’aprĂšs-guerre.Of the seven documentaries directed by Jacques-Bernard Brunius in the 1930s, only Violons d’Ingres (1939) has been regularly written about by film historians. A closer look at the history of his other films of the decade reveals an original filmmaker who, while continuing certain traditions inaugurated by the avant-garde documentarians of the end of the silent era – especially the compilation film – searched for ways to help the genre evolve in the era of sound cinema. Particular attention is paid to Autour d’une Ă©vasion (1934), a project partly inherited from Jean Vigo, and Records 37 (1937), produced for the Paris World’s Fair but distributed after in theaters with la Grande Illusion by Renoir, as well as Brunius’s montage work for La vie est Ă  nous by the same filmmaker. In conclusion we consider the influence he has had on the post-war generation of French documentarians

    Along-margin variations in breakup volcanism at the Eastern North American Margin

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    Author Posting. © American Geophysical Union, 2020. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 125(12),(2020): e2020JB020040, https://doi.org/10.1029/2020JB020040.We model the magnetic signature of rift‐related volcanism to understand the distribution and volume of magmatic activity that occurred during the breakup of Pangaea and early Atlantic opening at the Eastern North American Margin (ENAM). Along‐strike variations in the amplitude and character of the prominent East Coast Magnetic Anomaly (ECMA) suggest that the emplacement of the volcanic layers producing this anomaly similarly varied along the margin. We use three‐dimensional magnetic forward modeling constrained by seismic interpretations to identify along‐margin variations in volcanic thickness and width that can explain the observed amplitude and character of the ECMA. Our model results suggest that the ECMA is produced by a combination of both first‐order (~600–1,000 km) and second‐order (~50–100 km) magmatic segmentation. The first‐order magmatic segmentation could have resulted from preexisting variations in crustal thickness and rheology developed during the tectonic amalgamation of Pangaea. The second‐order magmatic segmentation developed during continental breakup and likely influenced the segmentation and transform fault spacing of the initial, and modern, Mid‐Atlantic Ridge. These variations in magmatism show how extension and thermal weakening was distributed at the ENAM during continental breakup and how this breakup magmatism was related to both previous and subsequent Wilson cycle stages.Thanks to Anne BĂ©cel, Dan Lizarralde, Collin Brandl, Brandon Shuck, and Mark Everett for beneficial discussion and assistance in compiling the archived data used in this study. We thank Debbie Hutchinson (USGS Woods Hole Coastal and Marine Science Center) for passing along her vast breadth of knowledge on the ENAM through numerous constructive suggestions to greatly strengthen our manuscript. We greatly appreciate the insightful comments from two reviewers, the Associate Editor, and the Editor that significantly improved the manuscript. Thanks to Maurice Tivey for providing codes that aided our magnetic modeling efforts. Project completed as part of J.A.G.'s Ph.D. dissertation at Texas A&M University.2021-05-1

    Refining the formation and early evolution of the Eastern North American Margin : new insights from multiscale magnetic anomaly analyses

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    Author Posting. © American Geophysical Union, 2017. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 122 (2017): 8724–8748, doi:10.1002/2017JB014308.To investigate the oceanic lithosphere formation and early seafloor spreading history of the North Atlantic Ocean, we examine multiscale magnetic anomaly data from the Jurassic/Early Cretaceous age Eastern North American Margin (ENAM) between 31 and 40°N. We integrate newly acquired sea surface magnetic anomaly and seismic reflection data with publicly available aeromagnetic and composite magnetic anomaly grids, satellite-derived gravity anomaly, and satellite-derived and shipboard bathymetry data. We evaluate these data sets to (1) refine magnetic anomaly correlations throughout the ENAM and assign updated ages and chron numbers to M0–M25 and eight pre-M25 anomalies; (2) identify five correlatable magnetic anomalies between the East Coast Magnetic Anomaly (ECMA) and Blake Spur Magnetic Anomaly (BSMA), which may document the earliest Atlantic seafloor spreading or synrift magmatism; (3) suggest preexisting margin structure and rifting segmentation may have influenced the seafloor spreading regimes in the Atlantic Jurassic Quiet Zone (JQZ); (4) suggest that, if the BSMA source is oceanic crust, the BSMA may be M series magnetic anomaly M42 (~168.5 Ma); (5) examine the along and across margin variation in seafloor spreading rates and spreading center orientations from the BSMA to M25, suggesting asymmetric crustal accretion accommodated the straightening of the ridge from the bend in the ECMA to the more linear M25; and (6) observe anomalously high-amplitude magnetic anomalies near the Hudson Fan, which may be related to a short-lived propagating rift segment that could have helped accommodate the crustal alignment during the early Atlantic opening.J. A. G. and M. T. thank the Department of Geology and Geophysics at Texas A&M University for their support of J. A. G.’s PhD program. M. T. and M. R. K. thank the Department of Earth and Environmental Sciences at Michigan State University for their support during M. R. K.’s MS thesis project, included in this study.2018-05-1

    Exploring the use of phonological and semantic representations in working memory

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    In the traditional conception of working memory for word lists, phonological codes are used primarily, and semantic codes are often discarded or ignored. Yet, other evidence indicates an important role for semantic codes. We carried out a preplanned set of four experiments to determine whether phonological and semantic codes are used similarly or differently. In each trial, random lists of one, two, three, four, six, or eight words were followed by a probe to be judged present in the list or absent from it. Sometimes, a probe was absent from the list but rhymed with a list item (in Experiments 1 and 2) or was a synonym of a list item (in Experiments 3 and 4). A probe that was similar to a list item was to be rejected just like other nontarget probes, a reject-similar use (in Experiments 1 and 3), or it was to be placed in the same category as list items, an accept-similar use (in Experiments 2 and 4). The results were comparable in the accept-similar use of both phonological and semantic codes. However, the reject-similar use was interestingly different. Rejecting rhyming items was more difficult than rejecting control words, as expected, whereas rejecting synonyms was easier than rejecting control words, presumably due to a recall-to-reject process. This effect increased with memory load. We discuss theoretically important differences between the use of phonology and semantics in working memory

    The proportion of working memory items recoverable from long-term memory remains fixed despite adult aging.

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    We explored whether long-term memory (LTM) retrieval is constrained by working memory (WM) limitations, in 80 younger and 80 older adults. Participants performed a WM task with images of unique everyday items, presented at varying set sizes. Subsequently, we tested participants’ LTM for items from the WM task and examined the ratio of LTM/WM retention. While older adults’ WM and LTM were generally poorer than that of younger adults, their LTM deficit was no greater than what was predicted from their WM performance. The ability to encode WM information into LTM appeared immune to age-related cognitive decline

    A lifespan study of the confidence-accuracy relation in working memory and episodic long-term memory

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    The relation between an individual’s memory accuracy and reported confidence in their memories can indicate self-awareness of memory strengths and weaknesses. We provide a lifespan perspective on this confidence-accuracy relation, based on two previously published experiments with 320 participants, including children aged 6 to 13, young adults aged 18 to 27, and older adults aged 65 to 77, across tests of working memory (WM) and long-term memory (LTM). Participants studied visual items in arrays of varying set sizes and completed item recognition tests featuring six-point confidence ratings either immediately after studying each array (WM tests) or following a long period of study events (LTM tests). Confidence-accuracy characteristic analyses showed that accuracy improved with increasing confidence for all age groups and in both WM and LTM tests. These findings reflect a universal ability across the lifespan to use awareness of the strengths and limitations of one’s memories to adjust reported confidence. Despite this age invariance in the confidence-accuracy relation, however, young children were more prone to high-confidence memory errors than other groups in tests of WM, whereas older adults were more susceptible to high-confidence false alarms in tests of LTM. Thus, although participants of all ages can assess when their memories are weaker or stronger, individuals with generally weaker memories are less adept at this confidence-accuracy calibration. Findings also speak to potential different sources of high-confidence memory errors for young children and older adults, relative to young adults
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