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Semantic Zoom and Mini-Maps for Software Cities
No full textSoftware visualization tools can facilitate program comprehension by providing visual metaphors, or abstractions that reduce the amount of textual data that needs to be processed mentally. One way they do this is by enabling developers to build an internal representation of the visualized software and its architecture. However, as the amount of displayed data in the visualization increases, the visualization itself can become more difficult to comprehend. The ability to display small and large amounts of data in visualizations is called visual scalability.In this paper, we present two approaches to address the challenge of visual scalability in 3D software cities. First, we present an approach to semantic zoom, in which the graphical representation of the software landscape changes based on the virtual camera’s distance from visual objects. Second, we augment the visualization with a miniature two-dimensional top-view projection called mini-map. We demonstrate our approach using an open-source implementation in our software visualization tool ExplorViz. ExplorViz is web-based and uses the 3D city metaphor, focusing on live trace visualization.We evaluated our approaches in two separate user studies. The results indicate that semantic zoom and the mini-map are both useful additions. User feedback indicates that semantic zoom and mini-maps are especially useful for large software landscapes and collaborative software exploration. The studies indicate a good usability of our implemented approaches. However, some shortcomings in our implementations have also been discovered, to be addressed in future work.Video URL: https://youtu.be/LYtUeWvizj
"Durch Boris bekommt die Forschung mehr Beachtung"
No full textOcean Race Europe: Geomar-Chefin Prof. Katja Matthes und Profisegler Boris Herrmann über Klimaschutz und sportliche Ziel
Die Suche nach dem Wrack
No full textNeue Generation Forschungstaucher der CAU sucht versunkenes Schiff - ein wichtiger Teil der Ausbildun
Enhanced deep Southern Ocean stratification during the lukewarm interglacials
No full textBetween ~800 and 430 thousand years ago lukewarm interglacials were characterized by lower atmospheric CO2 levels and colder Antarctic temperatures than subsequent interglacials. The Southern Ocean is thought to have played a crucial role, but associated ocean circulation changes remain poorly constrained, at least in part, due to the scarcity of proxy data. By using a novel 2D laser ablation technique, we here provide the first orbital-resolution Southern Ocean seawater Pb isotope records over the past 800 thousand years from a ferromanganese crust located at mid-depth (~1.6 km water depth) on Antarctica’s Pacific margin. Our results reveal systematically higher 208Pb/206Pb ratios during lukewarm interglacials than during more recent interglacials while 206Pb/204Pb ratios remained similar, suggesting reduced vertical deep-water mixing in the Southern Ocean during lukewarm interglacials. By enhancing deep-sea carbon sequestration and thereby lowering atmospheric CO2, strengthened deep Southern Ocean stratification likely imposed critical impacts on the lukewarm interglacial climates
Age and radiogenic isotope geochemistry of the Agulhas Plateau (SW Indian Ocean) drilled during IODP Exp. 392
No full textInterannual variability of net primary productivity in the Northwest African coastal upwelling system and their relation to Dakar Niños and Niñas
No full textFragen einer Sedimentkern-Sammlung
No full textHinterfragt man bei Sedimentkernen, auf +4°C gekühlt und mit hohem Raumbedarf gelagert, ob alles Material aufzuheben ist, ist die Antwort „ja!“
• Die Beschaffung auf Schiffsausfahrten ist teuer und nicht sehr umweltfreundlich
• Stammt aus geopolitisch nicht mehr zugänglichen Gebieten
• Wandel in den Forschungsbereichen, z.Bsp. von „klassischer Paläoklimaforschung“ zu Forschung an vulkanischen Aschen, wo „Paläoklima-Kerne“ „nachgenutzt“ werden
Wie kann das Aufbewahren nachhaltiger gestaltet werden?
Neben moderner Lagertechnik und energieeffizienten Kühlsystemen ist die öffentliche Sichtbarkeit und Zugänglichkeit zum vorhandenen Material ein Weg, um das Potential einer Sammlung auszuschöpfen. Praxisbeispiele für GIS-basierte Übersichtsplattformen, die institutsübergreifend Sedimentkernbestände aufführen, sind DAM Seafloor Viewer und IMLGS des NOAA. Die Praxis zeigt, dass mit mehr Öffentlichkeitsarbeit die Nachnutzung steigt. Statt mehrere lange Expeditionen durchführen zu müssen, geht man ein paar Tage in die vernetzten Probenlager.
Ist es sinnvoll, die Kerne bei genau dieser Temperatur aufzuheben? Provokativ gefragt: Ginge es nicht auch zwei Grad wärmer? Das würde Energie sparen.
Wie lange soll aufbewahrt werden? Es sollte geklärt werden, ob Aufbewahrungsfristen definiert werden können. Unsere Nutzungsordnung enthält keinen Passus diesbezüglich
Monitoring of microbiota in sex-specific tissues of the broad-nosed pipefish Syngnathus typhle during the breeding season
No full textBridging the gap between field and lab: Applicability and performance of the Sylt mesocosms facility to simulate climate change scenarios on intertidal benthic communities
No full textClimate change significantly threatens coastal ecosystems, making effective conservation strategies essential and reliant on accurate data. This study employed the Sylt mesocosms facility to examine how coastal marine communities respond to both individual and combined stressors. Within the broader context of this research, environmental variables such as pH, temperature, and nutrient levels in the mesocosms were continuously monitored and compared with field data. In addition, growth rates of blue mussels (Mytilus edulis) and Pacific oysters (Magallana gigas) were assessed, along with the body condition of M. edulis, to evaluate the functionality of the facility. While the water temperature in the mesocosms remained closely regulated according to the programmed set points, the pH and nutrient levels varied in a manner similar to natural field conditions. The concentration of chlorophyll a, used as an indicator of food availability within the tanks, was lower than in the field but did not significantly influence the growth rates and conditions of the filter feeders. The facility demonstrated its effectiveness throughout the experimental period in controlling temperature, highlighting its potential for future research on the effects of single and multiple stressors in near-natural conditions. These findings highlight the importance of mesocosms as a research tool for understanding the complex dynamics of marine ecosystems facing climate change
INIPM–GEOMAR: Advances in understanding ocean circulation and upwelling off Angola
No full textCooperation between the Phyical Oceanography departement of GEOMAR and National Institute for Fisheries Research in Luanda, Angola began in 2013 and continues until today. Aside from capacity strengthening aspects, 8 joint research cruises to Angolan waters were carried out in the last 12 years, focussing on the eastern boundary cricualtion and the physical processses sustaining the seasonal upwelling. The talk summarizes the major advances in understanding and quantifying the eastern boundary circulation and the physical control of the upwelling