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Search Results: 1 - 10 of 331506 matches for " Benjamin S. Giese "
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Historical Phase-Locked El Ni?o Episodes  [PDF]
David H. Douglass, Robert S. Knox, Scott Curtis, Benjamin S. Giese, Sulagna Ray
Atmospheric and Climate Sciences (ACS) , 2017, DOI: 10.4236/acs.2017.71005
Abstract: Using a newly reported Pacific sea surface temperature data set, we extend a prior study that assigned El Niño episodes to distinct sequences. Within these sequences the episodes are phase-locked to subharmonics of the annual solar irradiance cycle having two- or three-year periodicity. There are 40 El Niño episodes occurring since 1872, each found within one of eighteen such sequences. Our list includes all previously reported events. Three El Niño episodes have already been observed in boreal winters of 2009, 2012 and 2015, illustrating a sequence of 3-year intervals that began in 2008. If the climate system remains in this state, the next El Niño is likely to occur in boreal winter of 2018.
SoFiA: a flexible source finder for 3D spectral line data
Paolo Serra,Tobias Westmeier,Nadine Giese,Russell Jurek,Lars Fl?er,Attila Popping,Benjamin Winkel,Thijs van der Hulst,Martin Meyer,B?rbel S. Koribalski,Lister Staveley-Smith,Hélène Courtois
Physics , 2015, DOI: 10.1093/mnras/stv079
Abstract: We introduce SoFiA, a flexible software application for the detection and parameterization of sources in 3D spectral-line datasets. SoFiA combines for the first time in a single piece of software a set of new source-finding and parameterization algorithms developed on the way to future HI surveys with ASKAP (WALLABY, DINGO) and APERTIF. It is designed to enable the general use of these new algorithms by the community on a broad range of datasets. The key advantages of SoFiA are the ability to: search for line emission on multiple scales to detect 3D sources in a complete and reliable way, taking into account noise level variations and the presence of artefacts in a data cube; estimate the reliability of individual detections; look for signal in arbitrarily large data cubes using a catalogue of 3D coordinates as a prior; provide a wide range of source parameters and output products which facilitate further analysis by the user. We highlight the modularity of SoFiA, which makes it a flexible package allowing users to select and apply only the algorithms useful for their data and science questions. This modularity makes it also possible to easily expand SoFiA in order to include additional methods as they become available. The full SoFiA distribution, including a dedicated graphical user interface, is publicly available for download.
Influence of Carbohydrates on Secondary Metabolism in Fusarium avenaceum
Jens Laurids S?rensen,Henriette Giese
Toxins , 2013, DOI: 10.3390/toxins5091655
Abstract: Fusarium avenaceum is a widespread pathogen of important crops in the temperate climate zones that can produce many bioactive secondary metabolites, including moniliformin, fusarin C, antibiotic Y, 2-amino-14,16-dimethyloctadecan-3-ol (2-AOD-3-ol), chlamydosporol, aurofusarin and enniatins. Here, we examine the production of these secondary metabolites in response to cultivation on different carbon sources in order to gain insight into the regulation and production of secondary metabolites in F. avenaceum. Seven monosaccharides (arabinose, xylose, fructose, sorbose, galactose, mannose, glucose), five disaccharides (cellobiose, lactose, maltose, sucrose and trehalose) and three polysaccharides (dextrin, inulin and xylan) were used as substrates. Three F. avenaceum strains were used in the experiments. These were all able to grow and produce aurofusarin on the tested carbon sources. Moniliformin and enniatins were produced on all carbon types, except on lactose, which suggest a common conserved regulation mechanism. Differences in the strains was observed for production of fusarin C, 2-AOD-3-ol, chlamydosporol and antibiotic Y, which suggests that carbon source plays a role in the regulation of their biosynthesis.
Evidence of antiblockade in an ultracold Rydberg gas
Thomas Amthor,Christian Giese,Christoph S. Hofmann,Matthias Weidemüller
Physics , 2009, DOI: 10.1103/PhysRevLett.104.013001
Abstract: We present the experimental observation of the antiblockade in an ultracold Rydberg gas recently proposed by Ates et al. [Phys. Rev. Lett. 98, 023002 (2007)]. Our approach allows the control of the pair distribution in the gas and is based on a strong coupling of one transition in an atomic three-level system, while introducing specific detunings of the other transition. When the coupling energy matches the interaction energy of the Rydberg long-range interactions, the otherwise blocked excitation of close pairs becomes possible. A time-resolved spectroscopic measurement of the Penning ionization signal is used to identify slight variations in the Rydberg pair distribution of a random arrangement of atoms. A model based on a pair interaction Hamiltonian is presented which well reproduces our experimental observations and allows one to analyze the distribution of nearest neighbor distances.
Eine Bibliothek für alle Bereiche – ein Situationsbericht der Krankenhausbibliotheken im Klinikum Stuttgart / A library for all departments – an overview about the hospital libraries Klinikum Stuttgart
Giese, Christa
GMS Medizin-Bibliothek-Information , 2011,
Abstract: In a short overview the tasks and customer-oriented services of the hospital library Klinikum Stuttgart with the medical and patient library are described with the tasks for the next years
Global Flows with Chinese Characteristics
Karsten Giese
Journal of Current Chinese Affairs , 2012,
Abstract: Introduction to Journal of Current Chinese Affairs 2/2012: Global Flows with Chinese Characteristics
Improvements for Readers and Authors – Further Enhancing Quality, International Circulation, and Academic Impact Verbesserungen für Leser und Autoren - Weitere Qualit tssteigerung, Internationale Verbreitung und wissenschaftliche Relevanz
Karsten Giese
Journal of Current Chinese Affairs , 2009,
Abstract: Editorial of Vol. 38, No. 1 (2009) of the "Journal of Current Chinese Affairs - China Aktuell" Editorial für Vol. 38, No. 1 (2009) der Zeitschrift ";Journal of Current Chinese Affairs - CHINA aktuell";
Die Mobilisierung des Kostüms. überlegungen zur Rolle des Rockes in formeller und halbformeller Kleidung
Charlotte Giese
querelles-net , 2009,
Abstract: Die seri se Repr sentation von Staat und Unternehmen ist untrennbar verbunden mit dem Herrenanzug und seinem weiblichen Pendant, dem Hosenanzug. Auch das Kostüm, die Kombination aus Jackett und Rock, ist an den Herrenanzug angelehnt und war den damaligen Kleidungskonventionen entsprechend eher da als der weibliche Hosenanzug. Dieser Beitrag befasst sich mit der heutigen Bedeutung des Rockes für formal-repr sentative Anl sse und seinen halbformellen Weiterentwicklungen. Der Rock wird in urbaner Alltagskleidung zunehmend ersetzt durch eine Kleidung-K rper-Formation aus enger Hose und Frauenbein. Die Anpassung des Outfits an das urbane Mobilit tsverhalten und die Codierung des Kostüms als weiblich verdr ngen ihn zunehmend aus der (halb-)formellen Alltagskleidung. Serious representation of the self in politics and business often goes hand in hand with the man’s suit and its feminine counterpart, the pantsuit. The combination of jacket and skirt is also related to the man’s suit and in the past was more common than the feminine pantsuit. This study examines the skirt’s meaning today for representative formal occasions as well as the skirt’s increasingly semiformal nature. In today’s urban clothing environment more and more skirts are being replaced by a hybrid formation between dress and body. This consists of tight pants that accentuate women’s legs. The fact that the skirt remains coded as feminine and that outfits increasingly conform to fit urban mobility means that the skirt has been excluded from (semi)formal wear.
Stochastic Coefficient of Restitution - a New Approach to the Dynamics of Granular Media
Goetz Giese
Physics , 1995,
Abstract: We consider a one-dimensional "gas" of inelastically colliding particles where kinetic energy is dissipated by the excitation of vibrational degrees of freedom. In our model the coefficient of restitution is a stochastic quantity whose distribution can be calculated from an exact stochastic equation of motion. We investigate the equipartition properties of the system and propose a new algorithm for computer simulations, that is a combination of event-driven and Monte-Carlo methods.
Chondroitin Sulfate Proteoglycan CSPG4 as a Novel Hypoxia-Sensitive Marker in Pancreatic Tumors
Shereen Keleg, Alexandr Titov, Anette Heller, Thomas Giese, Christine Tjaden, Sufian S. Ahmad, Matthias M. Gaida, Andrea S. Bauer, Jens Werner, Nathalia A. Giese
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0100178
Abstract: CSPG4 marks pericytes, undifferentiated precursors and tumor cells. We assessed whether the shed ectodomain of CSPG4 (sCSPG4) might circulate and reflect potential changes in CSPG4 tissue expression (pCSPG4) due to desmoplastic and malignant aberrations occurring in pancreatic tumors. Serum sCSPG4 was measured using ELISA in test (n = 83) and validation (n = 221) cohorts comprising donors (n = 11+26) and patients with chronic pancreatitis (n = 11+20) or neoplasms: benign (serous cystadenoma SCA, n = 13+20), premalignant (intraductal dysplastic IPMNs, n = 9+55), and malignant (IPMN-associated invasive carcinomas, n = 4+14; ductal adenocarcinomas, n = 35+86). Pancreatic pCSPG4 expression was evaluated using qRT-PCR (n = 139), western blot analysis and immunohistochemistry. sCSPG4 was found in circulation, but its level was significantly lower in pancreatic patients than in donors. Selective maintenance was observed in advanced IPMNs and PDACs and showed a nodal association while lacking prognostic relevance. Pancreatic pCSPG4 expression was preserved or elevated, whereby neoplastic cells lacked pCSPG4 or tended to overexpress without shedding. Extreme pancreatic overexpression, membranous exposure and tissuehigh/seralow-discordance highlighted stroma-poor benign cystic neoplasm. SCA is known to display hypoxic markers and coincide with von-Hippel-Lindau and Peutz-Jeghers syndromes, in which pVHL and LBK1 mutations affect hypoxic signaling pathways. In vitro testing confined pCSPG4 overexpression to normal mesenchymal but not epithelial cells, and a third of tested carcinoma cell lines; however, only the latter showed pCSPG4-responsiveness to chronic hypoxia. siRNA-based knockdowns failed to reduce the malignant potential of either normoxic or hypoxic cells. Thus, overexpression of the newly established conditional hypoxic indicator, CSPG4, is apparently non-pathogenic in pancreatic malignancies but might mark distinct epithelial lineage and contribute to cell polarity disorders. Surficial retention on tumor cells renders CSPG4 an attractive therapeutic target. Systemic ‘drop and restoration’ alterations accompanying IPMN and PDAC progression indicate that the interference of pancreatic diseases with local and remote shedding/release of sCSPG4 into circulation deserves broad diagnostic exploration.
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