TY - JOUR A1 - Schneider, Hans Julius T1 - Was heißt "einer Regel nicht folgen"? BT - zur Erklärbarkeit sprachlicher Kreativität JF - Kreativität Y1 - 2006 SN - 978-3-7873-1766-0 SN - 978-3-7873-1766-X SP - 785 EP - 799 PB - Meiner CY - Hamburg ER - TY - JOUR A1 - Mersch, Dieter T1 - Imagination, Figuralität und Kreativität BT - zur Frage der bedingungen kultureller Produktivität JF - Kreativität Y1 - 2006 SN - 978-3-7873-1766-0 SN - 978-3-7873-1766-x SP - 344 EP - 359 PB - Meiner CY - Hamburg ER - TY - JOUR A1 - Krahé, Barbara T1 - Sexuelle Aggression JF - Handbuch der Sozialpsychologie und Kommunikationspsychologie T2 - Sexual Aggression Y1 - 2006 SN - 978-3-8017-1844-2 SP - 226 EP - 232 PB - Hogrefe CY - Göttingen ER - TY - JOUR A1 - Rebentisch, Juliane T1 - Geheimgeschichten JF - Golden years : Materialien und Positionen zu queerer Subkultur und Avantgarde zwischen 1959 und 1974 Y1 - 2006 SN - 978-3-900508-46-3 SP - 11 EP - 16 PB - Edition Camera Austria CY - Graz ER - TY - CHAP ED - Diederichsen, Diedrich ED - Frisinghelli, Christine ED - Gurk, Christoph ED - Haase, Matthias ED - Rebentisch, Juliane ED - Saar, Martin ED - Sonderegger, Ruth T1 - Golden Years BT - Materialien und Positionen zu queerer Subkultur und Avantgarde zwischen 1959 und 1974 N2 - Im Rahmen des „steirischen herbst“ 1999 unter der Intendanz von Christine Frisinghelli und im Rahmen eines von Jörg Schlick und Christoph Gurk initiierten größeren Projektes unter dem Titel „REMAKE/RE-MODEL. Secret Histories of Art, Pop, Life and The Avantgarde“ spürte eine Gruppe von KulturwissenschaftlerInnen, PhilosophInnen und AutorInnen diesen „Geheimgeschichten“ von Subkulturen nach (Diedrich Diederichsen, Matthias Haase, Juliane Rebentisch, Martin Saar, Ruth Sonderegger). In einer Installation samt eigens produziertem historischen Film von Mike Kelley, einer Retrospektive der frisch restaurierten Filme von Jack Smith, Performances von Terre Thaemlitz und Ultra-red und vor allem einem Symposium mit u.a. Douglas Crimp, Jerry Tartaglia, Gertrud Koch und den beteiligten KünstlerInnen wurde diesen Fragen nachgegangen. Der rekonstruktive Teil des Symposiums und seine Dokumentation findet sich nun in diesem unter dem Titel GOLDEN YEARS herausgegebenen Band, der seine Aktualität nicht zuletzt aus auch nachfolgend entstandenen Beiträgen und durch die Ergänzung mit wichtigem historischen Quellenmaterial erhält. Y1 - 2006 SN - 978-3-900508-46-3 PB - Edition Camera Austria CY - Graz ER - TY - BOOK A1 - Becker, Ulrich A1 - Benedens, Niels Peter A1 - Deppe, Volker A1 - Düwel, Martin A1 - Hermann, Klaus A1 - Kluge, Johannes A1 - Liedtke, Frank A1 - Schmidt, Jürgen A1 - Schmidt, Thorsten Ingo A1 - Baum, Christoph T1 - Kommunalabgabengesetz für das Land Brandenburg BT - abgaberechtliche Vorschriften des Landes Berlin : Kommentar, Text T3 - Gesetze, Verordnungen, Kommentare N2 - Das Kommunalabgabengesetz für das Land Brandenburg (KAG) ist eine für alle Kommunalverwaltungen, Zweckverbände und Anwälte wichtige Rechtsmaterie. Den 20 Paragrafen steht eine Fülle von Fragen nach Auslegung und Anwendung des Gesetzes gegenüber, die von der Rechtsprechung mit zahlreichen Entscheidungen beantwortet werden. Mit dem Werk "Kommunalabgabengesetz für das Land Brandenburg" liegt ein umfassender Kommentar vor, der sich mit der Auslegung des brandenburgischen Kommunalabgabengesetzes (KAG) und der dazu ergangenen Rechtsprechung befasst. Die zahlreichsten Gerichtsentscheidungen beinhaltet die Kommentierung zu § 6 (Benutzungsgebühren) Einerseits darf der Titel für sich in Anspruch nehmen, auch nicht speziell juristisch ausgebildete Nutzer in die Rechtsvorschriften zum KAG Brandenburg einzuführen. Andererseits will es aber auch den mit dem Abgabenrecht befassten Fachleuten in Verwaltungen, Verbänden, Gerichten und Kanzleien eine solide Grundlage für möglichst rechtssichere Entscheidungen bieten. Der engen räumlichen Nähe wegen beinhaltet das Werk die Abgabenrechtlichen Vorschriften des Landes Berlin. KW - Abgaben KW - Steuern KW - Gebühren KW - Beiträge KW - Abgabenbescheide KW - KAG Y1 - 2006 SN - 978-3-8293-0764-2 N1 - Loseblattsammlung PB - Kommunal- und Schul-Verlag CY - Wiesbaden ER - TY - GEN A1 - Lettl, Tobias T1 - Haftung bei Gesellschaftsgründung BT - (Original-)Referendarexamensklausur - Gesellschaftsrecht T2 - Juristische Schulung : JuS ; Zeitschrift für Studium und Referendariat Y1 - 2006 SN - 0022-6939 VL - 46 SP - 912 EP - 920 PB - Beck CY - München ER - TY - JOUR A1 - Wübbenhorst, Steffi A1 - Hetzschold, Rico A1 - Quitter, Annina A1 - Krüger, Sebastian A1 - Reischke, Anja A1 - Bertheau, Andreas A1 - Leppin, Karin A1 - Meier, Stephan A1 - Wolter, Thomas A1 - Lucas, Robert T1 - Portal alumni T2 - Das Ehemaligen-Magazin der Universität Potsdam N2 - Keine Jobsuche, kein Chef- aber auch kein festes Gehalt. Die Entscheidung fur eine berufliche Selbständigkeit hat sowohl Vor- als auch Nachteile. Welche guten und welche leidvollen Erfahrungen Potsdamer Absolventen mit einer Unternehmensgründung gemacht haben, können Sie in unserem Titelthema der nunmehr vierten Auflage von "portal alumni" lesen. Die Startbedingungen und Motive "unserer" Existenz· gründersind sehr unterschiedlich. So übernahmen manche das elterliche Unternehmen, für einige war die Selbständigkeit die einzige Alternative zur Arbeitslosigkeit. Dass der Schritt nicht immer aus dem Wunsch heraus gegangen wird, eigene Ideen zu verwirklichen, konstatiert auch Prof Dr. Guido Reger, in seinem Artikel. An der Universität Potsdam erhalten Gründungswillige vielfaltigste Unterstützung. So kommt es also nicht von ungefahr, dass die Hochschule zu den drei Universitäten in Deutschland gehört, die künftigen Selbständigen die besten Bildungsvoraussetzungen bietet, wie kürzlich in einem Ranking ermittelt wurde. Zudem gewann sie in diesem Jahr zum zweiten Mal in Folge beim Businessplanwettbewerb BerlinErandenburg den Hochschulwettbewerb. Außerdem finden Sie in diesem Heft die neue Rubrik "alumni insight". Lesen Sie dort beispielsweise, warum Stephan Reichelt den Aufstieg auf einen bisher noch nie bezwungenen Berg im Himalaya wagt. Haben auch Sie etwas Ungewöhnliches und Spannendes zu berichten? Haben Sie vielleicht ein Buch geschrieben oder möchten Sie andere Ehemalige zur Eröffnung Ihres Restaurants einladen, dann lassen Sie es uns wissen. N2 - no Job search, no boss - but also no Jixed salary. The decision for self-employment brings with it advantages and disadvantages. ln the main section ofthisfourth issue of"Portal alumni" you can read all about the good and not-so-good experiences that alumni of the University of Potsdam have had when founding new businesses, as weil about as the pleasures and burdens of being one's own boss. The conditions and motives upon founding differ greatly among "our'' founders of new businesses. Same took over their family businesses, others saw self-employment as the only alternative to unemployment. According to Prof Dr. Guido Reger, the step towards self-employment does not always come from a wish to realize one's own ideas. ln his articie in this issue he reports an the climate surrounding the founding of new businesses in Germany. He discusses the problems that make Germany less supportive of new businesses than other countries. Guido Reger is Foundation Professor for the Innovative Settmg up of Businesses and Development of Medium-sized Businesses at the University of Potsdam. Tagether with Prof Dr. Dieter Wagner, he heads the Institute for Setting up Business and Advancement of Medium-Sized Businesses in the State of Brandenburg- Center for Entrepreneurship and Innovation of Potsdam University (BIEM-CEIP). Here, persans wishing to found their own business receive diversified support, such as know-how, profossianal coaching and ftnancial aid. With this service, it is not a surprise that the University of Potsdam belongs to the three universities in Germany that offer future self-employed with outstanding education opportunities, according to a recent ranking. Moreover, the university won for the second year in a row the Business Plan Competition Berlin-Brandenburgfor institutes ofhigher leaming. ln the section ,.wegweiser" you willfind inforrnation an the University ofPotsdam's alumni services for founders of new businesses, including tips and links an related topics. Additionally, you will find a new section in this issue, "alumni insight". Here, you will read why Stephan Reichelt is da ring to climb a mountain in the Himalayas which has not yet been conquered. T3 - Portal alumni : das Ehemaligen-Magazin der Universität Potsdam - 4/2006 Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-481636 VL - 2006 IS - 4 EP - 66 ER - TY - JOUR A1 - Srama, Ralf A1 - Kempf, S. A1 - Moragas-Klostermeyer, Georg A1 - Helfert, S. A1 - Ahrens, T. J. A1 - Altobelli, N. A1 - Auer, S. A1 - Beckmann, U. A1 - Bradley, J. G. A1 - Burton, M. A1 - Dikarev, V. V. A1 - Economou, T. A1 - Fechtig, H. A1 - Green, S. F. A1 - Grande, M. A1 - Havnes, O. A1 - Hillierf, J.K. A1 - Horanyii, M. A1 - Igenbergsj, E. A1 - Jessberger, E. K. A1 - Johnson, T. V. A1 - Krüger, H. A1 - Matt, G. A1 - McBride, N. A1 - Mocker, A. A1 - Lamy, P. A1 - Linkert, D. A1 - Linkert, G. A1 - Lura, F. A1 - McDonnell, J.A.M. A1 - Möhlmann, D. A1 - Morfill, G. E. A1 - Postberg, F. A1 - Roy, M. A1 - Schwehm, G.H. A1 - Spahn, Frank A1 - Svestka, J. A1 - Tschernjawski, V. A1 - Tuzzolino, A. J. A1 - Wäsch, R. A1 - Grün, E. T1 - In situ dust measurements in the inner Saturnian system JF - Planetary and space science N2 - In July 2004 the Cassini–Huygens mission reached the Saturnian system and started its orbital tour. A total of 75 orbits will be carried out during the primary mission until August 2008. In these four years Cassini crosses the ring plane 150 times and spends approx. 400 h within Titan's orbit. The Cosmic Dust Analyser (CDA) onboard Cassini characterises the dust environment with its extended E ring and embedded moons. Here, we focus on the CDA results of the first year and we present the Dust Analyser (DA) data within Titan's orbit. This paper does investigate High Rate Detector data and dust composition measurements. The authors focus on the analysis of impact rates, which were strongly variable primarily due to changes of the spacecraft pointing. An overview is given about the ring plane crossings and the DA counter measurements. The DA dust impact rates are compared with the DA boresight configuration around all ring plane crossings between June 2004 and July 2005. Dust impacts were registered at altitudes as high as 100 000 km above the ring plane at distances from Saturn between 4 and 10 Saturn radii. In those regions the dust density of particles bigger than 0.5 can reach values of 0.001m-3. KW - Cassini KW - dust KW - CDA KW - E-ring KW - water ice Y1 - 2006 U6 - https://doi.org/10.1016/j.pss.2006.05.021 SN - 0032-0633 VL - 54 IS - 9-10 SP - 967 EP - 987 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Steuer, Ralf A1 - Gross, Thilo A1 - Selbig, Joachim A1 - Blasius, Bernd T1 - Structural kinetic modeling of metabolic networks JF - Proceedings of the National Academy of Sciences of the United States of America N2 - To develop and investigate detailed mathematical models of metabolic processes is one of the primary challenges in systems biology. However, despite considerable advance in the topological analysis of metabolic networks, kinetic modeling is still often severely hampered by inadequate knowledge of the enzyme-kinetic rate laws and their associated parameter values. Here we propose a method that aims to give a quantitative account of the dynamical capabilities of a metabolic system, without requiring any explicit information about the functional form of the rate equations. Our approach is based on constructing a local linear model at each point in parameter space, such that each element of the model is either directly experimentally accessible or amenable to a straightforward biochemical interpretation. This ensemble of local linear models, encompassing all possible explicit kinetic models, then allows for a statistical exploration of the comprehensive parameter space. The method is exemplified on two paradigmatic metabolic systems: the glycolytic pathway of yeast and a realistic-scale representation of the photosynthetic Calvin cycle. KW - systems biology KW - computational biochemistry KW - metabolomics KW - metabolic regulation KW - biological robustness Y1 - 2006 U6 - https://doi.org/10.1073/pnas.0600013103 SN - 0027-8424 SN - 1091-6490 VL - 103 IS - 32 SP - 11868 EP - 11873 PB - National Academy of Sciences CY - Washington ER - TY - JOUR A1 - Makuch, Martin A1 - Brilliantov, Nikolai V. A1 - Sremcevic, Miodrag A1 - Spahn, Frank A1 - Krivov, Alexander V. T1 - Stochastic circumplanetary dynamics of rotating non-spherical dust particles JF - Planetary and space science N2 - We develop a model of stochastic radiation pressure for rotating non-spherical particles and apply the model to circumplanetary dynamics of dust grains. The stochastic properties of the radiation pressure are related to the ensemble-averaged characteristics of the rotating particles, which are given in terms of the rotational time-correlation function of a grain. We investigate the model analytically and show that an ensemble of particle trajectories demonstrates a diffusion-like behaviour. The analytical results are compared with numerical simulations, performed for the motion of the dusty ejecta from Deimos in orbit around Mars. We find that the theoretical predictions are in a good agreement with the simulation results. The agreement however deteriorates at later time, when the impact of non-linear terms, neglected in the analytic approach, becomes significant. Our results indicate that the stochastic modulation of the radiation pressure can play an important role in the circumplanetary dynamics of dust and may in case of some dusty systems noticeably alter an optical depth. (c) 2006 Elsevier Ltd. All rights reserved. KW - Mars KW - Deimos KW - ejecta KW - stochastics KW - radiation pressure Y1 - 2006 U6 - https://doi.org/10.1016/j.pss.2006.05.006 SN - 0032-0633 VL - 54 IS - 9-10 SP - 855 EP - 870 PB - Elsevier CY - Oxford ER - TY - GEN A1 - Grün, Eberhard A1 - de Pater, Imke A1 - Showalter, Mark A1 - Spahn, Frank A1 - Srama, Ralf T1 - Physics of dusty rings: History and perspective BT - Foreword T2 - Planetary and space science Y1 - 2006 U6 - https://doi.org/10.1016/j.pss.2006.05.005 SN - 0032-0633 VL - 54 IS - 9-10 SP - 837 EP - 843 PB - Elsevier CY - Oxford ER - TY - JOUR A1 - Förster, Hans-Jürgen A1 - Rhede, Dieter T1 - The Be-Ta-rich granite of Seiffen (eastern Erzgebirge, Germany) BT - accessory-mineral chemistry, composition, and age of a late-Variscan Li-F granite of A-type affinity JF - Neues Jahrbuch für Mineralogie : Abhandlungen N2 - The mildly peraluminous granite of Seiffen, in the eastern Erzgebirge of Germany, is exposed by drillcores and associated with an abandoned Sri mine. The granite is of Stefanian age, with overlapping Th-U-total Pb monazite (302 +/- 4 Ma) and K-Ar siderophyllite ages (301 +/- 5 Ma). It is among the youngest granites in the Erzgebirge, emplaced in an extensional setting. The medium-grained, equigranular granite classifies as high-F, low-P Li-mica granite of A-type affinity. It is spatially associated with a high-Si rhyolitic microgranite, documenting the shallow intrusion level of this igneous association. Zircon, monazite-(Ce), and xenotime-(Y) constitute important radioactive accessory minerals in the granite, hosting the major proportions (> 80-90%) of the bulk-rock budgets of the REE, Y, and Th. A significant percentage of U (40-50%) may reside within unidentified phases or precipitated along grain boundaries. The most uncommon accessory phase is late-magmatic ytterbian xenotime-(Y) containing up to 11.2 wt% Yb2O3, in addition to 7.3 wt% Er2O3 and 7.9 wt% Dy2O3. The Seiffen granite (epsilon(Nd(300)) = -4.6) is geochemically evolved and rich in Sri (23-63 ppm) and W (11-14 ppm). It contains elevated to high concentrations of incompatible lithophile elements such as F, Li, Ga, Rb, Y, Nb, Cs, REE, Th, and U, thus having much in common chemically with subvolcanic ongonites. The most prominent compositional feature is the strong enrichment (in ppm) in Be (51-55) and Ta (23-28). The granite exhibits flat chondrite-normalized REE patterns (La-N/Lu-N = 1.35-1.48) and a moderate negative Eu anomaly (Eu/Eu* = 0.12-0.13). Indications for alteration-induced, postmagmatic disturbances of initial elemental abundances are weak and mainly relate to the ore-forming elements Sri and U. KW - Li-F granite KW - Th-U-Pb monazite age KW - beryllium KW - tantalum KW - ytterbian xenotime-(Y) KW - ongonite KW - post-collisional setting Y1 - 2006 U6 - https://doi.org/10.1127/0077-7757/2006/0055 SN - 0077-7757 VL - 182 IS - 3 SP - 307 EP - 321 PB - Schweizerbart CY - Stuttgart ER - TY - JOUR A1 - Rawel, Harshadrai Manilal A1 - Frey, Simone K. A1 - Meidtner, Karina A1 - Kroll, Jürgen A1 - Schweigert, Florian J. T1 - Determining the binding affinities of phenolic compounds to proteins by quenching of the intrinsic tryptophan fluorescence JF - Molecular nutrition & food research : bioactivity, chemistry, immunology, microbiology, safety, technology N2 - The noncovalent binding of selected phenolic compounds (chlorogenic-, ferutic-, gallic acid, quercetin, rutin, and isoquercetin) to proteins (HSA, BSA, soy glycinin, and lysozyme) was studied by an indirect method applying the quenching of intrinsic tryptophan fluorescence. From the data obtained, the binding constants were calculated by nonlinear regression (one site binding; y = Bx/k + x). It has been reported that tannins inhibit human salivary amylase and that these complexes may reduce the development of cariogenic plaques. Further, amylase contains two tryptophan residues in its active site. Therefore, in a second part of the study involving 31 human subjects, evidence was sought for noncovalent interactions between the phenols of green tea and saliva proteins as measured by the fluorescence intensity. Amylase activity was determined before and after the addition of green tea to saliva of 31 subjects. Forty percent of the subjects showed an increase in amylase activity contrary to studies reporting only a decrease in activity. The interactions of tannin with amylase result in a decrease of its activity. It still remains to be elucidated why amylase does not react uniformly under conditions of applying green tea to saliva. Further, in terms of using phenols as caries inhibitors this finding should be of importance. KW - amylase activity KW - green tea phenols KW - protein-phenol binding KW - saliva proteins KW - tryptophan quenching Y1 - 2006 U6 - https://doi.org/10.1002/mnfr.200600013 SN - 1613-4125 VL - 50 IS - 8 SP - 705 EP - 713 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Rohn, Sascha A1 - Petzke, Klaus-Jürgen A1 - Rawel, Harshadrai Manilal A1 - Kroll, Jürgen T1 - Reactions of chlorogenic acid and quercetin with a soy protein isolate - Influence on the in vivo food protein quality in rats JF - Molecular nutrition & food research : bioactivity, chemistry, immunology, microbiology, safety, technology N2 - Plant phenolic compounds are known to interact with proteins producing changes in the food (e.g., biological value (BV), color, taste). Therefore, the in vivo relevance, especially, of covalent phenolprotein reactions on protein quality was studied in a rat bioassay. The rats were fed protein derivatives at a 10% protein level. Soy proteins were derivatized with chlorogenic acid and quercetin (derivatization levels: 0.056 and 0.28 mmol phenolic compound/gram protein). Analysis of nitrogen in diets, urine, and fecal samples as well as the distribution of amino acids were determined. Depending on the degree of derivatization, the rats fed with soy protein derivatives showed an increased excretion of fecal and urinary nitrogen. As a result, true nitrogen digestibility, BV, and net protein utilization were adversely affected. Protein digestibility corrected amino acid score was decreased for lysine, tryptophan, and sulfur containing amino acids. KW - amino acid score KW - plant phenolic compounds KW - protein derivatization KW - protein digestibility KW - soy protein Y1 - 2006 U6 - https://doi.org/10.1002/mnfr.200600043 SN - 1613-4125 VL - 50 SP - 696 EP - 704 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Moustakas, Aristides A1 - Günther, Matthias A1 - Wiegand, Kerstin A1 - Müller, Karl-Heinz A1 - Ward, David A1 - Meyer, Katrin M. A1 - Jeltsch, Florian T1 - Long-term mortality patterns of the deep-rooted Acacia erioloba BT - The middle class shall die! JF - Journal of vegetation science N2 - Question: Is there a relationship between size and death in the Iona-lived, deep-rooted tree, Acacia erioloba, in a semi-arid savanna? What is the size-class distribution of A. erioloba mortality? Does the mortality distribution differ from total tree size distribution? Does A. erioloba mortality distribution match the mortality distributions recorded thus far in other environments? Location: Dronfield Ranch, near Kimberley, Kalahari, South Africa. Methods: A combination of aerial photographs and a satellite image covering 61 year was used to provide long-term spatial data on mortality. We used aerial photographs of the study area from 1940, 1964, 1984, 1993 and a satellite image from 2001 to follow three plots covering 510 ha. We were able to identify and individually follow ca. 3000 individual trees from 1940 till 2001. Results: The total number of trees increased over time. No relationship between total number of trees and mean tree size was detected. There were no trends over time in total number of deaths per plot or in size distributions of dead trees. Kolmogorov-Smirnov tests showed no differences in size class distributions for living trees through time. The size distribution of dead trees was significantly different from the size distribution of all trees present on the plots. Overall, the number of dead trees was low in small size classes, reached a peak value when canopy area was 20 - 30 m(2), and declined in lamer size-classes. Mortality as a ratio of dead vs. total trees peaked at intermediate canopy sizes too. Conclusion: A. erioloba mortality was size-dependent, peaking at intermediate sizes. The mortality distribution differs from all other tree mortality distributions recorded thus far. We suggest that a possible mechanism for this unusual mortality distribution is intraspecific competition for water in this semi-arid environment. KW - competition KW - long-term data KW - remote sensing KW - savanna KW - size dependent mortality KW - size distribution KW - tree death Y1 - 2006 U6 - https://doi.org/10.1111/j.1654-1103.2006.tb02468.x SN - 1100-9233 VL - 17 SP - 473 EP - 480 PB - Blackwell CY - Malden ER - TY - GEN A1 - Schmoll, Tim A1 - Schurr, Frank Martin A1 - Winkel, W. A1 - Lubjuhn, Thomas T1 - Female extra-pair mating, fitness and genetic diversity: Expression in socially monogamous Coal Tits T2 - Journal of ornithology Y1 - 2006 SN - 0021-8375 VL - 147 SP - 248 EP - 248 PB - Elsevier CY - New York ER - TY - GEN A1 - Neye, Gundula A1 - Wallschläger, Hans-Dieter A1 - Tiedemann, Ralph T1 - Song dialect boundaries in the Yellowhammer: Do they restrict gene flow? T2 - Journal of ornithology Y1 - 2006 SN - 0021-8375 VL - 147 IS - Supplement 1 SP - 219 EP - 219 PB - Blackwell CY - New York ER - TY - GEN A1 - Tiedemann, Ralph A1 - Pfautsch, Simone T1 - MHC evolution in ducks and allies T2 - Journal of ornithology Y1 - 2006 SN - 0021-8375 VL - 147 IS - Supplement 1 SP - 48 EP - 48 PB - Blackwell CY - New York ER - TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Koppitz, Jörg A1 - Štrakov, Slavčo T1 - Multi-hypersubstitutions and colored solid varieties JF - International journal of algebra and computation N2 - Hypersubstitutions are mappings which map operation symbols to terms. Terms can be visualized by trees. Hypersubstitutions can be extended to mappings defined on sets of trees. The nodes of the trees, describing terms, are labelled by operation symbols and by colors, i.e. certain positive integers. We are interested in mappings which map differently-colored operation symbols to different terms. In this paper we extend the theory of hypersubstitutions and solid varieties to multi-hypersubstitutions and colored solid varieties. We develop the interconnections between such colored terms and multihypersubstitutions and the equational theory of Universal Algebra. The collection of all varieties of a given type forms a complete lattice which is very complex and difficult to study; multi-hypersubstitutions and colored solid varieties offer a new method to study complete sublattices of this lattice. KW - coloration of terms KW - multi-hypersubstitutions KW - colored solid varieties Y1 - 2006 U6 - https://doi.org/10.1142/S0218196706003189 SN - 0218-1967 VL - 16 IS - 4 SP - 797 EP - 815 PB - World Scient. Publ. CY - Singapore ER - TY - GEN A1 - Bousquet, Romain A1 - De Capitani, Christian A1 - Arcay, Diane T1 - Feedback of the metamorphic changes on the subducting processes T2 - Geochimica et cosmochimica acta : journal of the Geochemical Society and the Meteoritical Society Y1 - 2006 U6 - https://doi.org/10.1016/j.gca.2006.06.228 SN - 0016-7037 VL - 70 IS - 18 SP - A62 EP - A62 PB - Elsevier CY - Oxford ER - TY - GEN A1 - Ten Freyhaus, Henrik A1 - Huntgeburth, Michael A1 - Wingler, Kirstin A1 - Baeumer, A. T. A1 - Wartenberg, Maria A1 - Sauer, H. A1 - Bekhite, Mohamed M. A1 - Rosenkranz, S. T1 - Inhibition of ROS liberation by the novel nox inhibitor VAS2870 attenuates PDGF-dependent src activation and chemotaxis, but not proliferation in vascular smooth muscle cells T2 - European heart journal Y1 - 2006 SN - 0195-668X SN - 1522-9645 VL - 27 SP - 965 EP - 965 PB - Oxford University Press CY - Oxford ER - TY - JOUR A1 - De Bleser, Ria T1 - A linguist's view on progressive anomia: Evidence for Delbrück (1886) in modern neurolinguistic research JF - Cortex : a journal devoted to the study of the nervous system and behaviour N2 - In his short paper of 1886, the neogrammarian linguist Delbruck sketches his views on normal language processing and their relevance for the interpretation of some of the symptoms of progressive anomic aphasia. In particular, he discusses proper name impairments, verb and abstract noun superiority and the predominance of semantically related errors. Furthermore, he suggests that part of speech, morphology and word order may be preserved in this condition. This historical document has been lost in oblivion but the original ideas and their relevance for contemporary discussions merit a revival. KW - neogrammarians Y1 - 2006 U6 - https://doi.org/10.1016/S0010-9452(08)70421-0 SN - 0010-9452 VL - 42 SP - 805 EP - 810 PB - Elsevier CY - Milano ER - TY - JOUR A1 - Garnier, Sebastien A1 - Laschewsky, Andre T1 - Non-ionic amphiphilic block copolymers by RAFT-polymerization and their self-organization JF - Colloid and polymer science : official journal of the Kolloid-Gesellschaft N2 - Water-soluble, amphiphilic diblock copolymers were synthesized by reversible addition fragmentation chain transfer polymerization. They consist of poly(butyl acrylate) as hydrophobic block with a low glass transition temperature and three different nonionic water-soluble blocks, namely, the classical hydrophilic block poly(dimethylacrylamide), the strongly hydrophilic poly(acryloyloxyethyl methylsulfoxide), and the thermally sensitive poly(N-acryloylpyrrolidine). Aqueous micellar solutions of the block copolymers were prepared and characterized by static and dynamic light scattering analysis (DLS and SLS). No critical micelle concentration could be detected. The micellization was thermodynamically favored, although kinetically slow, exhibiting a marked dependence on the preparation conditions. The polymers formed micelles with a hydrodynamic diameter from 20 to 100 nm, which were stable upon dilution. The micellar size was correlated with the composition of the block copolymers and their overall molar mass. The micelles formed with the two most hydrophilic blocks were particularly stable upon temperature cycles, whereas the thermally sensitive poly(N-acryloylpyrrolidine) block showed a temperature-induced precipitation. According to combined SLS and DLS analysis, the micelles exhibited an elongated shape such as rods or worms. It should be noted that the block copolymers with the most hydrophilic poly(sulfoxide) block formed inverse micelles in certain organic solvents. KW - macrosurfactants KW - block copolymers KW - micelles KW - inverse micelles KW - sulfoxide Y1 - 2006 U6 - https://doi.org/10.1007/s00396-006-1484-9 SN - 0303-402X VL - 284 SP - 1243 EP - 1254 PB - Springer CY - Berlin ER - TY - JOUR A1 - Assmann, Birte A1 - Thiel, Marco A1 - Romano, Maria Carmen A1 - Niemitz, Carsten T1 - Recurrence plot analyses suggest a novel reference system involved in newborn spontaneous movements JF - Behavior research methods : a journal of the Psychonomic Society N2 - The movements of newborns have been thoroughly studied in terms of reflexes, muscle synergies, leg coordination, and target-directed arm/hand movements. Since these approaches have concentrated mainly on separate accomplishments, there has remained a clear need for more integrated investigations. Here, we report an inquiry in which we explicitly concentrated on taking such a perspective and, additionally, were guided by the methodological concept of home base behavior, which Ilan Golard developed for studies of exploratory behavior in animals. Methods from nonlinear dynamics, such as symbolic dynamics and recurrence plot analyses of kinematic data received from audiovisual newborn recordings, yielded new insights into the spatial and temporal organization of limb movements. In the framework of home base behavior, our approach uncovered a novel reference system of spontaneous newborn movements. Y1 - 2006 U6 - https://doi.org/10.3758/BF03192793 SN - 1554-351X SN - 1554-3528 VL - 38 IS - 3 SP - 400 EP - 406 PB - Springer CY - New York ER - TY - JOUR A1 - Steuer, Ralf A1 - Humburg, Peter A1 - Selbig, Joachim T1 - Validation and functional annotation of expression-based clusters based on gene ontology JF - BMC bioinformatics N2 - Background: The biological interpretation of large-scale gene expression data is one of the paramount challenges in current bioinformatics. In particular, placing the results in the context of other available functional genomics data, such as existing bio-ontologies, has already provided substantial improvement for detecting and categorizing genes of interest. One common approach is to look for functional annotations that are significantly enriched within a group or cluster of genes, as compared to a reference group. Results: In this work, we suggest the information-theoretic concept of mutual information to investigate the relationship between groups of genes, as given by data-driven clustering, and their respective functional categories. Drawing upon related approaches (Gibbons and Roth, Genome Research 12: 1574-1581, 2002), we seek to quantify to what extent individual attributes are sufficient to characterize a given group or cluster of genes. Conclusion: We show that the mutual information provides a systematic framework to assess the relationship between groups or clusters of genes and their functional annotations in a quantitative way. Within this framework, the mutual information allows us to address and incorporate several important issues, such as the interdependence of functional annotations and combinatorial combinations of attributes. It thus supplements and extends the conventional search for overrepresented attributes within a group or cluster of genes. In particular taking combinations of attributes into account, the mutual information opens the way to uncover specific functional descriptions of a group of genes or clustering result. All datasets and functional annotations used in this study are publicly available. All scripts used in the analysis are provided as additional files. Y1 - 2006 U6 - https://doi.org/10.1186/1471-2105-7-380 SN - 1471-2105 VL - 7 IS - 380 PB - BioMed Central CY - London ER - TY - JOUR A1 - Füchsel, Gernot A1 - Klamroth, Tillmann A1 - Dokic, Jadranka A1 - Saalfrank, Peter T1 - On the electronic structure of neutral and ionic azobenzenes and their possible role as surface mounted molecular switches JF - The journal of physical chemistry : B, Condensed matter, materials, surfaces, interfaces & biophysical chemistry N2 - We report quantum chemical calculations, mostly based on density functional theory, on azobenzene and substituted azobenzenes as neutral molecules or ions, in ground and excited states. Both the cis and trans configurations are computed as well as the activation energies to transform one isomer into the other and the possible reaction paths and reaction surfaces along the torsion and inversion modes. All calculations are done for the isolated species, but results are discussed in light of recent experiments aiming at the switching of surface mounted azobenzenes by scanning tunneling microscopes. Y1 - 2006 U6 - https://doi.org/10.1021/jp060969v SN - 1520-6106 VL - 110 IS - 33 SP - 16337 EP - 16345 PB - Soc. CY - Washington ER - TY - JOUR A1 - Hirschfeld, Robert A1 - Kawarnura, Katsuya T1 - Dynamic service adaptation JF - Software : practice & experience N2 - Change can be observed in our environment and in the technology we build. While changes in the environment happen continuously and implicitly, our technology has to be kept in sync with the changing world around it. Although we can prepare for some of the changes for most of them we cannot. This is especially true for next-generation mobile communication systems that are expected to support the creation of a ubiquitous society where virtually everything is connected and made available within an organic information network. Resources will frequently join or leave the network, new types of media or new combinations of existing types will be used to interact and cooperate, and services will be tailored to preferences and needs of individual customers to better meet their needs. This paper outlines our research in the area of dynamic service adaptation to provide concepts and technologies allowing for such environments. Copyright (C) 2006 John Wiley & Sons, Ltd. KW - dynamic service adaptation KW - DSA KW - aspect-oriented programming KW - dynamic AOP Y1 - 2006 U6 - https://doi.org/10.1002/spe.766 SN - 0038-0644 SN - 1097-024X VL - 36 IS - 11-12 SP - 1115 EP - 1131 PB - Wiley CY - Chichester ER - TY - JOUR A1 - Diallo, Mamadou Sanou A1 - Kulesh, Michail A1 - Holschneider, Matthias A1 - Kurennaya, Kristina A1 - Scherbaum, Frank T1 - Instantaneous polarization attributes based on an adaptive approximate covariance method JF - Geophysics N2 - We introduce a method for computing instantaneous-polarization attributes from multicomponent signals. This is an improvement on the standard covariance method (SCM) because it does not depend on the window size used to compute the standard covariance matrix. We overcome the window-size problem by deriving an approximate analytical formula for the cross-energy matrix in which we automatically and adaptively determine the time window. The proposed method uses polarization analysis as applied to multicomponent seismic by waveform separation and filtering. Y1 - 2006 U6 - https://doi.org/10.1190/1.2227522 SN - 0016-8033 SN - 1942-2156 (0nline) VL - 71 IS - 5 SP - V99 EP - V104 PB - SEG CY - Tulsa ER - TY - JOUR A1 - Apio, Ann A1 - Plath, Martin A1 - Wronski, Torsten T1 - Patterns of gastrointestinal parasitic infections in the bushbuck Tragelaphus scriptus from the Queen Elizabeth National Park, Uganda JF - Journal of helminthology N2 - Seasonal, host sex and age-related variations in helminth egg and coccidian oocyst counts were investigated in a naturally infected wild bushbuck (Tragelaphus scriptus) population in Queen Elizabeth National Park, western Uganda from April 2000 to February 2002. The prevalence and mean intensity quantified as the number of eggs and oocysts per gram of faeces were taken as a measure of parasite burdens. Host sex and age-related differences in prevalence values were not found but the overall prevalence of Eimeria sp. was significantly higher during the rainy season, and peak counts were recorded either during or soon after a peak rainfall. A similar trend was observed for Moniezia spp., although the results were marginally not significant. There were also no significant differences in mean intensity values, relative to host sex, age or season. Y1 - 2006 U6 - https://doi.org/10.1076/JOH2006343 SN - 0022-149X VL - 80 IS - 3 SP - 213 EP - 218 PB - Univ. Press CY - Cambridge ER - TY - JOUR A1 - Panet, I. A1 - Chambodut, Aude A1 - Diament, M. A1 - Holschneider, Matthias A1 - Jamet, O. T1 - New insights on intraplate volcanism in French Polynesia from wavelet analysis of GRACE, CHAMP, and sea surface data JF - Journal of geophysical research : Solid earth N2 - [ 1] In this paper, we discuss the origin of superswell volcanism on the basis of representation and analysis of recent gravity and magnetic satellite data with wavelets in spherical geometry. We computed a refined gravity field in the south central Pacific based on the GRACE satellite GGM02S global gravity field and the KMS02 altimetric grid, and a magnetic anomaly field based on CHAMP data. The magnetic anomalies are marked by the magnetic lineation of the seafloor spreading and by a strong anomaly in the Tuamotu region, which we interpret as evidence for crustal thickening. We interpret our gravity field through a continuous wavelet analysis that allows to get a first idea of the internal density distribution. We also compute the continuous wavelet analysis of the bathymetric contribution to discriminate between deep and superficial sources. According to the gravity signature of the different chains as revealed by our analysis, various processes are at the origin of the volcanism in French Polynesia. As evidence, we show a large-scale anomaly over the Society Islands that we interpret as the gravity signature of a deeply anchored mantle plume. The gravity signature of the Cook-Austral chain indicates a complex origin which may involve deep processes. Finally, we discuss the particular location of the Marquesas chain as suggesting that the origin of the volcanism may interfere with secondary convection rolls or may be controlled by lithospheric weakness due to the regional stress field, or else related to the presence of the nearby Tuamotu plateau. Y1 - 2006 U6 - https://doi.org/10.1029/2005JB004141 SN - 0148-0227 VL - 111 PB - Union CY - Washington ER - TY - JOUR A1 - Baas, Timo A1 - Schrooten, Mechthild T1 - Relationship banking and SMEs: A theoretical analysis JF - Small business economics : an international journal N2 - Reliable information on small- and medium-sized enterprises (SMEs) is rare and costly for financial intermediaries. Therefore relationship banking is often considered as the appropriate lending technique. In this paper we offer a theoretical model to analyze relationship banking and the pricing behavior of banks in a Bertrand competition framework with monitoring costs. We show that the lack of reliable information leads to comparable high interest rates even if a long-term relationship between borrower and bank exists. The paper offers a theoretical explanation why SMEs often are faced with borrowing constraints. KW - accounting KW - financial constraints KW - relationship banking KW - small and medium sized enterprises Y1 - 2006 U6 - https://doi.org/10.1007/s11187-006-0018-7 SN - 0921-898X VL - 27 SP - 127 EP - 137 PB - Springer CY - Dordrecht ER - TY - JOUR A1 - Joulain, Karl A1 - Henkel, Carsten A1 - Greffet, Jean-Jacques T1 - Influence of the dependence in temperature of the optical properties of materials on the Casimir force JF - Journal de physique IV N2 - Nous évaluons la force de Casimir entre deux surfaces planes métalliques constituées d'argent. Nous prenons, pour effectuer cette évaluation, des propriétés optiques de l'argent à différentes températures [1]. Nous montrons que cette dépendance en température modifie la force de Casimir (de 0.2%) y compris à des distances inférieures à la longueur d'onde thermique. Y1 - 2006 U6 - https://doi.org/10.1051/jp4:2006135021 SN - 1155-4339 VL - 135 SP - 113 EP - 114 PB - EDP Sciences CY - Les Ulis ER - TY - JOUR A1 - De Andrade, V. A1 - Vidal, O. A1 - Lewin, E. A1 - Agard, P. A1 - O'brien, Patrick T1 - Quantification of electron microprobe compositional maps of rock thin sections: an optimized method and examples JF - Journal of metamorphic geology N2 - Quantification of discrete pressure-temperature domains in deformed chlorite + white mica-bearing metapelites was undertaken on mineral compositions derived by two-dimensional microprobe compositional mapping of selected areas of rock thin sections. In order to achieve compositional information at sufficient analytical precision, spatial resolution and sample coverage within a typical analysis time of 1 day, an optimization of measurement methods was necessary. The method presented here allows collection of raw counts for eight different element concentrations at an analytical precision of similar to 1-2 wt%. X-ray intensity multiplane maps (one map per measured chemical element) are translated into concentration multiplane maps, utilizing selected conventionally measured spot analyses combined with the Castaing approximation for each mineral. As this step requires identification of the different minerals present in the mapped area, a statistical clustering technique to identify different groups of composition was developed, guided by simple petrographic inspection of the thin section, to delineate the important minerals in the mapped area. Finally, the compositions of each pixel are translated into a mineral structural formula thus yielding a new kind of image with a high content of petrological information. The reliability of the mineral composition images was emphasized by carrying out precision tests on the analytical data. The possible use of chemical maps to infer the P-T-deformation history of metamorphic rocks is illustrated with two samples from the Spitzbergen and the Sambagawa blueschist facies belts. In both samples, a strong correlation between structures and chemistry is observed. Qualitative estimates of P-T conditions from the Si-content of mica and chlorite are in good agreement with their location in microstructures that formed at different times. Therefore, the combination of chemical maps with microstructural observations is a very powerful approach to understand both the evolution of complex metamorphic rocks and the control by deformation of mineral reactivity. KW - chlorite KW - compositional map KW - electron microprobe KW - mica KW - Sambagawa KW - Spitzbergen KW - X-ray mapping Y1 - 2006 U6 - https://doi.org/10.1111/j.1525-1314.2006.00660.x SN - 0263-4929 VL - 24 SP - 655 EP - 668 PB - Wiley-Blackwell CY - Oxford ER - TY - JOUR A1 - Laskov, Pavel A1 - Gehl, Christian A1 - Krüger, Stefan A1 - Müller, Klaus-Robert T1 - Incremental support vector learning: analysis, implementation and applications JF - Journal of machine learning research N2 - Incremental Support Vector Machines (SVM) are instrumental in practical applications of online learning. This work focuses on the design and analysis of efficient incremental SVM learning, with the aim of providing a fast, numerically stable and robust implementation. A detailed analysis of convergence and of algorithmic complexity of incremental SVM learning is carried out. Based on this analysis, a new design of storage and numerical operations is proposed, which speeds up the training of an incremental SVM by a factor of 5 to 20. The performance of the new algorithm is demonstrated in two scenarios: learning with limited resources and active learning. Various applications of the algorithm, such as in drug discovery, online monitoring of industrial devices and and surveillance of network traffic, can be foreseen. KW - incremental SVM KW - online learning KW - drug discovery KW - intrusion detection Y1 - 2006 SN - 1532-4435 VL - 7 SP - 1909 EP - 1936 PB - MIT Press CY - Cambridge, Mass. ER - TY - JOUR A1 - Wallny, Thomas A. A1 - Brackmann, H. H. A1 - Gunia, Günter A1 - Wilbertz, P. A1 - Oldenburg, J. A1 - Kraft, Clayton. N. T1 - Successful pain treatment in arthropathic lower extremities by acupuncture in haemophilia patients JF - Haemophilia : the official journal of the World Federation of Haemophilia N2 - Acupuncture is successfully used in the treatment of degenerative osteoarthritis. The treatment of haemophilic arthropathies can require strong painkillers with severe side-effects. Therefore, a special yet simple acupuncture technique was evaluated in the treatment of these joint problems. Twelve patients with a factor VIII activity < 1% and at least one painful arthropathy in both lower extremities were included in this single-blinded study. The non-treated side served as a control. Treatment was assessed by a visual analogue scale (VAS) and an orthopaedic clinical examination. Only one needle was inserted at the rear fontanelle once per week and in 15 cycles. Ten of 12 patients showed an improvement of their pain perception. The average VAS could be reduced from 6.8 to 5.0. The side not receiving treatment showed a reduction from 4.1 to 4.0. No side-effects were observed. Even though interpretation of our data are limited due to the small patient numbers, significant improvement of the VAS after treatment suggests that acupuncture has a measurable positive effect in pain management for haemophilic arthropathy of the lower extremities. KW - acupuncture KW - arthropathies KW - haemophilia KW - pain Y1 - 2006 U6 - https://doi.org/10.1111/j.1365-2516.2006.01308.x SN - 1351-8216 VL - 12 IS - 5 SP - 500 EP - 502 PB - Wiley-Blackwell CY - Oxford ER - TY - JOUR A1 - Dauvillee, David A1 - Chochois, Vincent A1 - Steup, Martin A1 - Haebel, Sophie A1 - Eckermann, Nora A1 - Ritte, Gerhard A1 - Ral, Jean-Philippe A1 - Colleoni, Christophe A1 - Hicks, Glenn A1 - Wattebled, Fabrice A1 - Deschamps, Philippe A1 - Lienard, Luc A1 - Cournac, Laurent A1 - Putaux, Jean-Luc A1 - Dupeyre, Danielle A1 - Ball, Steven G. T1 - Plastidial phosphorylase is required for normal starch synthesis in Chlamydomonas reinhardtii JF - The plant journal N2 - Among the three distinct starch phosphorylase activities detected in Chlamydomonas reinhardtii, two distinct plastidial enzymes (PhoA and PhoB) are documented while a single extraplastidial form (PhoC) displays a higher affinity for glycogen as in vascular plants. The two plastidial phosphorylases are shown to function as homodimers containing two 91-kDa (PhoA) subunits and two 110-kDa (PhoB) subunits. Both lack the typical 80-amino-acid insertion found in the higher plant plastidial forms. PhoB is exquisitely sensitive to inhibition by ADP-glucose and has a low affinity for malto-oligosaccharides. PhoA is more similar to the higher plant plastidial phosphorylases: it is moderately sensitive to ADP-glucose inhibition and has a high affinity for unbranched malto-oligosaccharides. Molecular analysis establishes that STA4 encodes PhoB. Chlamydomonas reinhardtii strains carrying mutations at the STA4 locus display a significant decrease in amounts of starch during storage that correlates with the accumulation of abnormally shaped granules containing a modified amylopectin structure and a high amylose content. The wild-type phenotype could be rescued by reintroduction of the cloned wild-type genomic DNA, thereby demonstrating the involvement of phosphorylase in storage starch synthesis. KW - Chlamydomonas KW - starch KW - amylopectin KW - (glycogen) starch phosphorylase Y1 - 2006 U6 - https://doi.org/10.1111/j.1365-313X.2006.02870.x SN - 0960-7412 VL - 48 IS - 2 SP - 274 EP - 285 PB - Blackwell CY - Oxford ER - TY - JOUR A1 - Diez, Isabel A1 - Tauer, Klaus A1 - Schulz, Burkhard T1 - Unusual polymer dispersions-polypyrrole suspensions made of rings, frames, and platelets JF - Colloid and polymer science : official journal of the Kolloid-Gesellschaft N2 - Experimental results show that the polymerization of pyrrole in the presence of beta-naphthalenesulfonic acid and different fluorosurfactants like perfluorooctanesulfonic acid, perfluorooctyldiethanolamide, and ammonium perfluorooctanoate leads to polypyrrole with special morphologies, such as rings or disks and rectangular frames or plates. The formation of these unusually shaped particles of polymer dispersions is explained by the chemical and colloidal peculiarities of the oxidative pyrrole polymerization with ammonium peroxodisulfate in aqueous medium. KW - polypyrrole KW - chemical oxidative polymerization KW - particle morphology Y1 - 2006 U6 - https://doi.org/10.1007/s00396-006-1521-8 SN - 0303-402X VL - 284 SP - 1431 EP - 1442 PB - Springer CY - New York ER - TY - JOUR A1 - Greil, Holle T1 - Patterns of sexual dimorphism from birth to senescence JF - Collegium antropologicum N2 - Sexual dimorphism is expressed as median of the female values in percent of the median of the male values, of 4 length measurements, 3 circumferences, and 5 measurements of corpulence respectively fat. Data were obtained from a cross-sectional sample of more than 41.000 German subjects, aged from birth to age 62. The pattern of sexual dimorphism is similar in the length measurements. Girls are shorter at birth, but they increase in length at higher rates than boys and even temporarily overgrow the boys up to age 12. Thereafter, males show an obvious growth advantage leading to some 6 to 9% more length in adult males. In contrast, female circumferences are always smaller, from birth to senescence. Though, the differences between the sexes are low in circumferences, up to age 13, sexual dimorphism increases to 17% in the thoracic circumference at adulthood. Sexual dimorphism in weight and BMI is comparably with that in length measurements while subcutaneous fat and total body fat content are always higher in females. The results highlight that sexual dimorphism develops at different pace in the various components of the body and that it associates with a sex specific growth tempo. KW - sexual dimorphism KW - biological age KW - growth-age KW - adulthood Y1 - 2006 SN - 0350-6134 VL - 30 IS - 3 SP - 637 EP - 641 PB - Institute for Anthropological Research CY - Zagreb ER - TY - JOUR A1 - Reich, Sebastian T1 - Linearly implicit time stepping methods for numerical weather prediction JF - BIT : numerical mathematics ; the leading applied mathematics journal for all computational mathematicians N2 - The efficient time integration of the dynamic core equations for numerical weather prediction (NWP) remains a key challenge. One of the most popular methods is currently provided by implementations of the semi-implicit semi-Lagrangian (SISL) method, originally proposed by Robert (J. Meteorol. Soc. Jpn., 1982). Practical implementations of the SISL method are, however, not without certain shortcomings with regard to accuracy, conservation properties and stability. Based on recent work by Gottwald, Frank and Reich (LNCSE, Springer, 2002), Frank, Reich, Staniforth, White and Wood (Atm. Sci. Lett., 2005) and Wood, Staniforth and Reich (Atm. Sci. Lett., 2006) we propose an alternative semi-Lagrangian implementation based on a set of regularized equations and the popular Stormer-Verlet time stepping method in the context of the shallow-water equations (SWEs). Ultimately, the goal is to develop practical implementations for the 3D Euler equations that overcome some or all shortcomings of current SISL implementations. KW - numerical weather prediction KW - linearly implicit time stepping methods KW - semi-Lagrangian method KW - Stormer-Verlet method KW - shallow-water equations Y1 - 2006 U6 - https://doi.org/10.1007/s10543-006-0065-0 SN - 0006-3835 VL - 46 SP - 607 EP - 616 PB - Springer CY - Dordrecht ER - TY - JOUR A1 - Ritte, Gerhard A1 - Heydenreich, Matthias A1 - Mahlow, Sebastian A1 - Haebel, Sophie A1 - Koetting, Oliver A1 - Steup, Martin T1 - Phosphorylation of C6- and C3-positions of glucosyl residues in starch is catalysed by distinct dikinases JF - FEBS letters : the journal for rapid publication of short reports in molecular biosciences N2 - Glucan, water dikinase (GWD) and phosphoglucan, water dikinase (PWD) are required for normal starch metabolism. We analysed starch phosphorylation in Arabidopsis wildtype plants and mutants lacking either GWD or PWD using P-31 NMR. Phosphorylation at both C6- and C3-positions of glucose moieties in starch was drastically decreased in GWD-deficient mutants. In starch from PWD-deficient plants C3-bound phosphate was reduced to levels close to the detection limit. The latter result contrasts with previous reports according to which GWD phosphorylates both C6- and C3-positions. In these studies, phosphorylation had been analysed by HPLC of acid-hydrolysed glucans. We now show that maltose-6-phosphate, a product of incomplete starch hydrolysis, co-eluted with glucose-3-phosphate under the chromatographic conditions applied. Re-examination of the specificity of the dikinases using an improved method demonstrates that C6- and C3-phosphorylation is selectively catalysed by GWD and PWD, respectively. KW - starch phosphorylation KW - GWD KW - PWD KW - P-31 NMR Y1 - 2006 U6 - https://doi.org/10.1016/j.febslet.2006.07.085 SN - 0014-5793 VL - 580 IS - 20 SP - 4872 EP - 4876 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Lisso, Janina A1 - Altmann, Thomas A1 - Müssig, Carsten T1 - The AtNFXL1 gene encodes a NF-X1 type zinc finger protein required for growth under salt stress JF - FEBS letters : the journal for rapid publication of short reports in molecular biosciences N2 - The human NF-X1 protein and homologous proteins in eukaryotes represent a class of transcription factors which are characterised. by NF-X1 type zinc finger motifs. The Arabidopsis genome encodes two NF-X1 homologs, which we termed AtNFXL1 and AtNFXL2. Growth and survival was impaired in atnfxl1 knock-out mutants and AtNFXL1-antisense plants under salt stress in comparison to wild-type plants. In contrast, 35S: :AtNFXL1 plants showed higher survival rates. The AtNFXL2 protein potentially plays an antagonistic role. The Arabidopsis NF-X1 type zinc finger proteins likely are part of regulatory mechanisms, which protect major processes such as photosynthesis. KW - Arabidopsis thaliana KW - NF-X1 KW - salt stress Y1 - 2006 U6 - https://doi.org/10.1016/j.febslet.2006.07.079 SN - 0014-5793 VL - 580 IS - 22 SP - 4851 EP - 4856 PB - Elsevier CY - Amsterdam ER - TY - GEN A1 - Lutz, Jean-Francois A1 - Kristen, Juliane A1 - Skrabania, Katja A1 - Laschewsky, Andre T1 - POLY 14-Synthetic strategies for preparing multicompartment micelles T2 - Abstracts of papers / American Chemical Society N2 - The fabrication of compartmented micellar systems is an exciting new area of research in the field of polymer self-assembly. Multicompartment micelles composed of a water-soluble shell and a segregated hydrophobic core can be obtained via direct aqueous self-assembly of preformed polymeric amphiphiles possessing one hydrophilic segment and two incompatible hydrophobic segments (e.g. hydrocarbon and fluorocarbon blocks). Such macromolecular building-blocks were prepared in the present work principally via reversible addition-fragmentation transfer polymerization (RAFT). Polysoaps or triblock macrosurfactants can be synthesized in high yields by RAFT under relatively straightforward experimental conditions. Y1 - 2006 SN - 0-8412-7426-6 SN - 0065-7727 VL - 232 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Hetzel, Ralf A1 - Niedermann, Samuel A1 - Tao, Mingxin A1 - Kubik, Peter W. A1 - Strecker, Manfred T1 - Climatic versus tectonic control on river incision at the margin of NE Tibet: Be-10 exposure dating of river terraces at the mountain front of the Qilian Shan JF - Journal of geophysical research : Earth surface N2 - [1] We document late Pleistocene - Holocene aggradation and incision processes at the mountain front of the Qilian Shan, an active intracontinental fold-and-thrust belt accommodating a significant portion of the India-Asia convergence. The Shiyou River cuts through a NNE vergent fault propagation fold with Miocene red beds in the core and Pliocene - Quaternary growth strata on the northern forelimb. South of the anticline, Miocene strata dip 20 degrees SSW, suggesting a similar orientation for the basal decollement. After aggradation of an similar to 150-m-thick, late Pleistocene valley fill, the Shiyou River formed three terraces. The highest terrace, located 170 m above the river, constitutes the top of the fill. The other terraces are fill cut terraces: their treads are located 130 - 105 m and 37 m above the river, respectively. The 10 Be exposure dating of the terraces suggests that river incision accelerated from 0.8 +/- 0.2 mm yr(-1) to similar to 10 mm yr(-1) at 10 - 15 kyr. We interpret fast Holocene river incision as largely unrelated to tectonic forcing. The late Pleistocene incision rate of 0.8 +/- 0.2 mm yr(-1) places an upper limit of 2.2 +/- 0.5 mm yr(-1) on the horizontal shortening rate, assuming that incision is solely caused by rock uplift above a decollement dipping 20 degrees. However, the actual shortening rate may lie between similar to 2.2 mm yr(-1) and zero because deformation of the terraces and the valley fill cannot be unequivocally demonstrated. Our estimate is consistent with the bulk shortening rate of similar to 5 - 10 mm yr(-1) across several faults in NE Tibet derived from neotectonic and GPS data, although in case of the Shiyou River, Holocene deformation is barely discernible owing to intense climate-induced river incision. Y1 - 2006 U6 - https://doi.org/10.1029/2005JF000352 SN - 2169-9003 SN - 2169-9011 VL - 111 PB - Union CY - Washington ER - TY - JOUR A1 - Schmidt, Bernd A1 - Nave, Stefan T1 - Stereoselective syntheses of enantiomerically pure 2,5-disubstituted dihydropyrans based on olefin metathesis JF - The journal of organic chemistry N2 - A short synthesis of 2,5-disubstituted dihydropyrans starting from D-mannitol as a chiral building block is described. Our synthetic approach combines ruthenium-catalyzed ring closing olefin metathesis and palladium-catalyzed nucleophilic substitution. Y1 - 2006 U6 - https://doi.org/10.1021/jo061190k SN - 0022-3263 VL - 71 IS - 19 SP - 7364 EP - 7369 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Krol, Maarten A1 - Jaeger, Annekathrin A1 - Bronstert, Axel A1 - Güntner, Andreas T1 - Integrated modelling of climate, water, soil, agricultural and socio-economic processes: A general introduction of the methodology and some exemplary results from the semi-arid north-east of Brazil JF - Journal of hydrology N2 - Many semi-arid regions are characterised by water scarcity and vulnerability of natural resources, pronounced climatic variability and social stress. Integrated studies including climatotogy, hydrology, and socio-econornic studies are required both for analysing the dynamic natural conditions and to assess possible strategies to make semi-arid regions Less vulnerable to the present and changing climate. The model introduced here dynamically describes the retationships between climate forcing, water availability, agriculture and selected societal processes. The model has been tailored to simulate the rather complex situation in the semi-and north-eastern Brazil in a quantitative manner including the sensitivity to external forcing, such as climate change. The selected results presented show the general functioning of the integrated model, with a primary focus on climate change impacts. It becomes evident that due to Large differences in regional climate scenarios, it is still impossible to give quantitative values for the most probable development, e.g., to assign probabilities to the simulated results. However, it becomes clear that water is a very crucial factor, and that an efficient and ecologically sound water management is a key question for the further development of that semi-arid region. The simulation results show that, independent of the differences in climate change scenarios, rain-fed farming is more vulnerable to drought impacts compared to irrigated farming. However, the capacity of irrigation and other water infrastructure systems to enhance resilience in respect to climatic fluctuations is significantly constrained given a significant negative precipitation trend. (c) 2005 Elsevier B.V. All rights reserved. KW - integrated modelling KW - integrated river basin management KW - water resources management KW - semi-arid hydrology KW - climate change Y1 - 2006 U6 - https://doi.org/10.1016/j.jhydrol.2005.12.021 SN - 0022-1694 VL - 328 IS - 3-4 SP - 417 EP - 431 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Grimm, Volker A1 - Berger, Uta A1 - Bastiansen, Finn A1 - Eliassen, Sigrunn A1 - Ginot, Vincent A1 - Giske, Jarl A1 - Goss-Custard, John A1 - Grand, Tamara A1 - Heinz, Simone K. A1 - Huse, Geir A1 - Huth, Andreas A1 - Jepsen, Jane U. A1 - Jorgensen, Christian A1 - Mooij, Wolf M. A1 - Mueller, Birgit A1 - Piou, Cyril A1 - Railsback, Steven Floyd A1 - Robbins, Andrew M. A1 - Robbins, Martha M. A1 - Rossmanith, Eva A1 - Rueger, Nadja A1 - Strand, Espen A1 - Souissi, Sami A1 - Stillman, Richard A. A1 - Vabo, Rune A1 - Visser, Ute A1 - DeAngelis, Donald L. T1 - A standard protocol for describing individual-based and agent-based models JF - Ecological modelling : international journal on ecological modelling and engineering and systems ecolog N2 - Simulation models that describe autonomous individual organisms (individual based models, IBM) or agents (agent-based models, ABM) have become a widely used tool, not only in ecology, but also in many other disciplines dealing with complex systems made up of autonomous entities. However, there is no standard protocol for describing such simulation models, which can make them difficult to understand and to duplicate. This paper presents a proposed standard protocol, ODD, for describing IBMs and ABMs, developed and tested by 28 modellers who cover a wide range of fields within ecology. This protocol consists of three blocks (Overview, Design concepts, and Details), which are subdivided into seven elements: Purpose, State variables and scales, Process overview and scheduling, Design concepts, Initialization, Input, and Submodels. We explain which aspects of a model should be described in each element, and we present an example to illustrate the protocol in use. In addition, 19 examples are available in an Online Appendix. We consider ODD as a first step for establishing a more detailed common format of the description of IBMs and ABMs. Once initiated, the protocol will hopefully evolve as it becomes used by a sufficiently large proportion of modellers. (c) 2006 Elsevier B.V. All rights reserved. KW - individual-based model KW - agent-based model KW - model description KW - scientific communication KW - standardization Y1 - 2006 U6 - https://doi.org/10.1016/j.ecolmodel.2006.04.023 SN - 0304-3800 VL - 198 SP - 115 EP - 126 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Kirsche, Andreas A1 - Böckmann, Christine T1 - Pade iteration method for regularization JF - Applied mathematics and computation N2 - In this study we present iterative regularization methods using rational approximations, in particular, Pade approximants, which work well for ill-posed problems. We prove that the (k,j)-Pade method is a convergent and order optimal iterative regularization method in using the discrepancy principle of Morozov. Furthermore, we present a hybrid Pade method, compare it with other well-known methods and found that it is faster than the Landweber method. It is worth mentioning that this study is a completion of the paper [A. Kirsche, C. Bockmann, Rational approximations for ill-conditioned equation systems, Appl. Math. Comput. 171 (2005) 385-397] where this method was treated to solve ill-conditioned equation systems. (c) 2006 Elsevier Inc. All rights reserved. KW - Pade approximants KW - iterative regularization KW - ill-posed problem Y1 - 2006 U6 - https://doi.org/10.1016/j.amc.2006.01.011 SN - 0096-3003 VL - 180 IS - 2 SP - 648 EP - 663 PB - Elsevier CY - New York ER - TY - JOUR A1 - Richter, Lothar A1 - Vollhardt, Dieter T1 - Force measuring methods for determination of surface tension of liquids: A comparison JF - Tenside, surfactants, detergents N2 - Three methods for the determination of the surface tension of liquids based on force measurements namely, the vertical plate method of Wilhelmy, the frame method of Lenard and the ring method of du Nouy are compared and studied in respect of a common principle of correction. It is shown that these three most important force-based methods allow the determination of the surface tension under static conditions. The force components of the corresponding liquid column below the measuring wire obtained for the straight part of the withdrawal curve up to the transition in its curved part provides exact surface tension values. The experimentally accessible value of the force component describes the physical background of the measured value correction contrary to the approximate equations obtained by mathematical way. Usually the determination of surface tension of liquids is based merely at the vertical plate method on exact equations thermodynamically derived whereas in the case of the frame and ring methods correction factors in approximate equations are used. At usual application of the force-based methods under the non-static condition of the withdrawal of a liquid column, the force maximum measured at withdrawal of the measuring object (plate, frame, or ring) is the basis for the determination of surface tension. In these cases, the measured surface tension values are compensated by correction equations for the frame and ring methods which are based on an correction factor and correction tables empirically obtained. The surface tension values obtained in this usual way agree with those obtained by using the force component of the corresponding liquid column below the measuring wire for the straight part of the withdrawal curve up to the transition in its curved part. Problems arising at the force measurements with increasing thickness of the measuring wires inside and outside the rings are discussed. N2 - Drei auf Kraftmessungen basierende Methoden zur Bestimmung der Oberflächenspannung von Flüssigkeiten, nämlich die Vertikalplattenmethode von Wilhelmy, die Bügelmethode von Lenard und die Ringmethode von du Noüy werden miteinander verglichen und auf ein experimentell zugängliches gemeinsames Korrekturprinzip hin untersucht. Auf Basis der Messresultate wird demonstriert, dass diese drei wichtigsten auf Kraftmessungen basierenden Methoden eine exakte Bestimmung der Oberflächenspannung ermöglichen. Dies basiert auf Berücksichtigung der Kraftkomponente der entsprechenden Flüssigkeitssäule unterhalb des Messdrahtes, der für die Austauchgerade bis zum Übergang in den gekrümmten Teil der Austauchkurve erhalten wird. Der experimentell zugängliche Wert der Kraftkomponente beschreibt den physikalischen Hintergrund der Messwertkorrektur im Gegensatz zu den auf mathematischen Weg erhaltenen Näherungsgleichungen. Gebräuchlicher Weise basiert die Bestimmung der Oberflächenspannung von Flüssigkeiten lediglich bei der Vertikalplattenmethode auf thermodynamisch-exakt ableitbaren Gleichungen, während bei Bügel- und Ringmethode Korrekturfaktoren für Näherungsgleichungen bzw. Korrekturtabellen üblich sind. Die so erhaltenen Oberflächenspannungswerte stimmen mit denen überein, die unter Berücksichtigung der Kraftkomponente der entsprechenden Flüssigkeitssäule unterhalb des Messdrahtes erhalten werden. Probleme, die mit zunehmender Dicke des Messdrahtes innerhalb und außerhalb des Rings entstehen, werden diskutiert. T2 - Kraftmessungsmethoden zur Bestimmung der Oberflächenspannung von Flüssigkeiten: Ein Vergleich KW - surface tension KW - force methods Y1 - 2006 U6 - https://doi.org/10.3139/113.100314 SN - 0932-3414 VL - 43 IS - 5 SP - 256 EP - 261 PB - Hanser CY - München ER - TY - JOUR A1 - Herzschuh, Ulrike A1 - Winter, Katja A1 - Wünnemann, Bernd A1 - Li, Shijie T1 - A general cooling trend on the central Tibetan Plateau throughout the Holocene recorded by the Lake Zigetang pollen spectra JF - Quaternary international : the journal of the International Union for Quaternary Research N2 - A 741-cm-long laminated sediment core, covering the last 10,800 years was collected from Lake Zigetang, central Tibetan Plateau (90.9 degrees E, 32.0 degrees N, 4560m a.s.l.), and analysed palynologically at 69 horizons. Biome reconstruction suggests a dominance of temperate steppe vegetation (mainly Artemisia and Poaceae) on the central Tibetan Plateau during the first half of the Holocene (10.8-4.4 cal. ka BP), while alpine steppes with desert elements (mainly Cyperaceae, Poaceae, Chenopodiaceae, and characteristic high-alpine herb families) tend to dominate the second half (4.4-0 cal. ka BP). The Artemisia/Cyperaceae ratio-a semi-quantitative measure for summer temperature-indicates a general cooling trend throughout the Holocene. Dense temperate steppe vegetation and maximum desert plant withdrawal, however, indicate that a suitable balance of wet and warm conditions for optimum vegetation growth likely occurred during the middle Holocene (7.3-4.4 cal. ka BP). Severe Early Holocene cold events have been reconstructed for 8.7-8.3 and similar to 7.4 cal. ka BP. (c) 2006 Elsevier Ltd and INQUA. All rights reserved. Y1 - 2006 U6 - https://doi.org/10.1016/j.quaint.2006.02.005 SN - 1040-6182 VL - 154 SP - 113 EP - 121 PB - Pergamon Press CY - Oxford ER -