Seasonal changes in sediment core PS1795-2

The Weddell Sea and the associated Filchner-Rønne Ice Shelf constitute key regions for global bottomwater production today. However, little is known about bottom-water production under different climate and icesheet conditions. Therefore, we studied core PS1795, which consists primarily of fine-grained siliciclastic varves that were deposited on contourite ridges in the southeastern Weddell Sea during the Last Glacial Maximum (LGM). We conducted high-resolution X-ray fluorescence (XRF) analysis and grain-size measurements with the RADIUS tool (Seelos and Sirocko, 2005, doi:10.1111/j.1365-3091.2005.00715.x) using thin sections to characterize the two seasonal components of the varves at sub-mm resolution to distinguish the seasonal components of the varves. Bright layers contain coarser grains that can mainly be identified as quartz in the medium-to-coarse silt grain size. They also contain higher amounts of Si, Zr, Ca, and Sr, as well as more ice-rafted debris (IRD). Dark layers, on the other hand, contain finer particles such as mica and clay minerals from the chlorite and illite groups. In addition, Fe, Ti, Rb, and K are elevated. Based on these findings as well as on previous analyses on neighbouring cores, we propose a model of enhanced thermohaline convection in front of a grounded ice sheet that is supported by seasonally variable coastal polynya activity during the LGM. Accordingly, katabatic (i.e. offshore blowing) winds removed sea ice from the ice edge, leading to coastal polynya formation. We suggest that glacial processes were similar to today with stronger katabatic winds and enhanced coastal polynya activity during the winter season. Under these conditions, lighter coarser-grained layers are likely glacial winter deposits, when brine rejection was increased, leading to enhanced bottom-water formation and increased sediment transport. Vice versa, darker finer-grained layers were then deposited during less windier season, mainly during summer, when coastal polynya activity was likely reduced.

Core scan image analysis corrected for cracks, ODP Hole 154-926C

Drill cores are essential for the study of deep-sea sediments and on-land sites because often no suitable outcrop is available or accessible. These cores form the backbone of stratigraphical studies using and combining various dating techniques. Cyclostratigraphy is usually based on fast and inexpensive measurements of physical sediment properties. One indirect but highly valuable proxy for reconstructing the sediment composition and variability is sediment color. However, cracks and other disturbances in sediment cores may dramatically influence the quality of color data retrieved either directly from photospectrometry or derived from core image analysis. Here we present simple but powerful algorithms to extract color data from core images, and focus on routines to exclude cracks from these images. Results are discussed using the example of an ODP core from the Ceara Rise in the Central Atlantic. The crack correction approach presented highly improves the quality of color data and allows the easy incorporation of cracked cores into studies based on core images. This facilitates the quick and inexpensive generation of large color datasets directly from quantified core images, for cyclostratigraphy and other purposes.

The influence of reading direction on hemianopic reading disorders.

Hemianopic reading impairment is a consequence of a visual field defect to either the right or the left side and is characterized by an increased reading time and reduced reading performance. Depending on the side of the visual field defect, reading will be affected differently: Patients suffering from a visual field defect to the right side have noticeable difficulties in reading fluently with slowing. Patients suffering from a visual field defect to the left usually struggle to find the beginning of a line and read more fluently. It was suggested in the literature that changing the reading direction from horizontal to vertical may be a training strategy to reduce reading problems in patients with hemianopia. The aim of the study was to investigate the influence of reading direction on reading speed in patients with left- or right-sided visual field defects and in healthy controls. METHOD In 13 patients with hemianopia and in 13 age-matched controls, reading speed was calculated for texts in standard as well as in clockwise rotated orientation of 90, 180, and 270°. RESULTS In both groups, text rotation reduced reading speed compared to standard reading. Patients with left-sided hemianopia had the greatest reduction after text rotation. Patients with right-sided hemianopia had the smallest speed reduction in 90° vertically rotated texts. CONCLUSIONS Text rotation has different effects in left- or right-sided hemianopia patients. For patients with left-sided heminanopia, rotation of the text may not be a helpful training strategy, for right-sided hemianopia vertical rotation of the text of 90° may be a beneficial training strategy to reduce reading deficits.

Pabst Gregorius VII und sein Zeitalter.

Added as separate volume Names and subjects Index by H. Ossenbeck: "Vollständiges Namen-und Sach-Register zu Gfrörer's Papst Gregorius VII und sein Zeitalter."

Stimmen der Zeit.

Includes supplements: Ergänzungsband 1-29 (1876-1915); Ergänzungshefte zu den Stimmen der Zeit. 1. Reihe: Kulturfragen (1917-1923) and 2. Reihe: Forschungen (1916-1920).

Archiv für schweizerische reformations-geschichte.

"Durch die direction: graf Theodor Scherer-Boccard ... Friedrich Fiala ... [und] Peter Bannwart."

Miracula & Mysteria chymico-medica libris quinque ... /

Mode of access: Internet.

Elsass-Lothringen,

Mode of access: Internet.

Geschichte des deutschen Volkes seit dem dreizehnten Jahrhundert bis zum Ausgang des Mittelalters,

Title varies slightly.

Teatr Krakowski, 1780-1815.

Mode of access: Internet.

Geschichtliche Werke /

Series statement also appears as Veröffentlichungen der Historischen Kommission für Westfalen: on v. 2 it appears entry as Veröffentlichungen der Historischen Kommission für die Provinz Westfalen.

Biographisch-historische Studien,

1. Bd. Sir Walter Raleigh. Die Liebe Pfalzgraf Friedrichs III. und Leonorens von Oesterreich. König Christiern II., das Täublein von Amsterdam und Mutter Sigbrit. Giulio Cesare (Lucilio) Vanini. Die aqua tofana in Rom unter Papst Alexander VII. und der Todtengräber zu Gürau in Nieder-Schlesien. Nachtrag zur Biographie Walter Raleighs.--2. Bd. Historische Parallelen und Zeitstimmen, Belgien und die Belgier betreffend. Zur Geschichte des Lebens, des Charakters und der Regierung König Wilhelms I. der Niederlande. Die Ereignisse zu Brüssel im September 1830. Bruchstücke einer Biographie des Demosthenes. Ferdinand Wanker, Professor der Moral und designirter Erzbischof von Freiburg. Habsburg; die Schicksale der Burg und des Geschlechts in gedrängtem Umriss. Stefano Porcaro. Vittoria Accoramboni. Beiträge zur Geschichte der Meerfahrt König Phillipps des Schönen im Jahr 1500. Floris von Montmorency, Herr von Montigny.