TY - JOUR A1 - Brosch, Renate T1 - Visual Culture Y1 - 2004 ER - TY - JOUR A1 - Bork, Hans-Rudolf A1 - Mieth, Andreas A1 - Tschochner, Bernd T1 - Nothing but stones? : a review of the extent and technical efforts of prehistoric stone mulching on Rapa Nui Y1 - 2004 ER - TY - JOUR A1 - Wessel, Niels A1 - Aßmus, Joerg A1 - Weidermann, Frank A1 - Konvicka, Jan A1 - Nestmann, S. A1 - Neugebauer, R. A1 - Schwarz, Udo A1 - Kurths, Jürgen T1 - Modeling thermal displacements in modular tool systems N2 - In the last decade, there has been an increasing interest in compensating thermally induced errors to improve the manufacturing accuracy of modular tool systems. These modular tool systems are interfaces between spindle and workpiece and consist of several complicatedly formed parts. Their thermal behavior is dominated by nonlinearities, delay and hysteresis effects even in tools with simpler geometry and it is difficult to describe it theoretically. Due to the dominant nonlinear nature of this behavior the so far used linear regression between the temperatures and the displacements is insufficient. Therefore, in this study we test the hypothesis whether we can reliably predict such thermal displacements via nonlinear temperature-displacement regression functions. These functions are estimated firstly from learning measurements using the alternating conditional expectation (ACE) algorithm and then tested on independent data sets. First, we analyze data that were generated by a finite element spindle model. We find that our approach is a powerful tool to describe the relation between temperatures and displacements for simulated data. Next, we analyze the temperature-displacement relationship in a silent real experimental setup, where the tool system is thermally forced. Again, the ACE-algorithm is powerful to estimate the deformation with high precision. The corresponding errors obtained by using the nonlinear regression approach are 10-fold lower in comparison to multiple linear regression analysis. Finally, we investigate the thermal behavior of a modular tool system in a working milling machine and get again promising results. The thermally induced errors can be estimated with 1-2${mu m}$ accuracy using this nonlinear regression analysis. Therefore, this approach seems to be very useful for the development of new modular tool systems. Y1 - 2004 ER - TY - JOUR A1 - Vollmeyer, Regina A1 - Rheinberg, Falko T1 - Influence de la motivation sur lïapprentissage dïun système linéaire Y1 - 2004 SN - 1705-0065 ER - TY - BOOK A1 - Bartke, Susanne A1 - Siegmüller, Julia T1 - Williams syndrome across languages T3 - Language acquisition and language disorders Y1 - 2004 SN - 1-588-11494-5 VL - 36 PB - Benjamins CY - Amsterdam ER - TY - JOUR A1 - Selting, Margret T1 - The "upward staircase" intonation contour in the Berlin vernacular : an example in the analysis of regionalized intonation as an interactional resource Y1 - 2004 SN - 1-58811-570-4 ER - TY - JOUR A1 - Kamjunke, Norbert A1 - Gaedke, Ursula A1 - Tittel, Jörg A1 - Weithoff, Guntram A1 - Bell, Elanor M. T1 - Strong vertical differences in the plankton composition of an extremely acidic lake N2 - Vertical differences in food web structure were examined in an extremely acidic, iron-rich mining lake in Germany (Lake 111; pH 2.6, total Fe 150mg L-1) during the period of stratification. We tested whether or not the seasonal variation of the plankton composition is less pronounced than the differences observed over depth. The lake was strongly stratified in summer, and concentrations of dissolved organic carbon and inorganic carbon were consistently low in the epilimnion but high in the hypolimnion. Oxygen concentrations declined in the hypolimnion but were always above 2mg L-1. Light attenuation did not change over depth and time and was governed by dissolved ferric iron. The plankton consisted mainly of single-celled and filamentous bacteria, the two mixotrophic flagellates Chlamydomonas sp. and Ochromonas sp., the two rotifer species Elosa worallii and Cephalodella hoodi, and Heliozoa as top predators. We observed very few ciliates and rhizopods, and no heterotrophic flagellates, crustaceans or fish. Ochromonas sp., bacterial filaments, Elosa and Heliozoa dominated in the epilimnion whereas Chlamydomonas sp., single-celled bacteria and Cephalodella dominated in the hypolimnion. Single-celled bacteria were controlled by Ochromonas sp. whereas the lack of large consumers favoured a high proportion of bacterial filaments. The primarily phototrophic Chlamydomas sp. was limited by light and CO2 and may have been reduced due to grazing by Ochromonas sp. in the epilimnion. The distribution of the primarily phagotrophic Ochromonas sp. and of the animals seemed to be controlled by prey availability. Differences in the plankton composition were much higher between the epilimnion and hypolimnion than within a particular stratum over time. The food web in Lake 111 was extremely species-poor enabling no functional redundancy. This was attributed to the direct exclusion of species by the harsh environmental conditions and presumably enforced by competitive exclusion. The latter was promoted by the low diversity at the first trophic level which, in turn, was attributed to relatively stable growth conditions and the independence of resource availability (inorganic carbon and light) from algal density. Ecological theory suggests that low functional redundancy promotes low stability in ecosystem processes which was not supported by our data. Y1 - 2004 ER - TY - BOOK ED - Mahler, Claudia T1 - Democracy, miniorities and human rihts education in Europe : workshop dpkumentation ; March 5 - 6, 2004, Humboldt University of Berlin ; teaching human rights in Europe ; VW-Tandem research project T3 - Studien zu Grund- und Menschenrechten / MenschenRechtsZentrum der Universität Potsdam Y1 - 2004 SN - 1435-9154 PB - Menschenrechtszentrum CY - Potsdam ER - TY - JOUR A1 - Couper-Kuhlen, Elizabeth T1 - Prosody and sequence organization in English conversation Y1 - 2004 SN - 1-58811-570-4 ER - TY - JOUR A1 - Tristram, Hildegard L. C. T1 - "Celtic Studies in Germany, 1980-1995" N2 - This article provides a survey of the research carried out by Celtic scholars in Germany during the 15 years between 1980 and 1995. It is based on the respective bibliography published in 'Studia Celtica Japonica' 9 (1997). The major research fields covered are IE Studies, Celtic philology, linguistics, literature, archaeology and cultural studies. Y1 - 2004 ER - TY - JOUR A1 - Peitsch, Helmut T1 - Sagara, E., Germany in the nineteenth century: history and literature; Oxford, Lang, 2001. Sagara E., A social history of Germany: 1648 - 1914; New Brunswick, Transaction Publ., 2003 BT - Germany in the nineteenth century : history and literature T2 - A social history of Germany : 1648 - 1914 Y1 - 2004 ER - TY - JOUR A1 - Haßler, Gerda T1 - Rosenfeld, S., A Revolution in Language: the Problem of Signs in Late Eighteenth-Century France; Stanford, Stanford University Press, 2001 BT - A revolution in language: the problem of signs in late eighteenth-century France; Stanford, Stanford University Press, 2001 Y1 - 2004 ER - TY - JOUR A1 - Hohmann, Andreas A1 - Fehr, Ulrich A1 - Kirsten, Robert A1 - Krüger, Tom T1 - Biomechanical analysis of the backstroke start technique in swimming Y1 - 2008 UR - http://www.ejournal-but.de SN - 1612-5770 ER - TY - JOUR A1 - Gericke, Beate A1 - Koebnick, Corinna A1 - Reimann, Manja A1 - Forterre, Simone A1 - Zunft, Hans-Joachim Franz A1 - Schweigert, Florian J. T1 - Influence of hormone replacement therapy on proteomic pattern in serum of postmenopausal women N2 - Objectives: Proteomics approaches to cardiovascular biology and disease hold the promise of identifying specific proteins and peptides or modification thereof to assist in the identification of novel biomarkers. Method: By using surface-enhanced laser desorption and ionization time of flight mass spectroscopy (SELDI-TOF-MS) serum peptide and protein patterns were detected enabling to discriminate between postmenopausal women with and without hormone replacement therapy (HRT). Results: Serum of 13 HRT and 27 control subjects was analyzed and 42 peptides and proteins could be tentatively identified based on their molecular weight and binding characteristics on the chip surface. By using decision tree-based Biomarker Patterns (TM) Software classification and regression analysis a discriminatory function was developed allowing to distinguish between HRT women and controls correctly and, thus, yielding a sensitivity of 100% and a specificity of 100%. The results show that peptide and protein patterns have the potential to deliver novel biomarkers as well as pinpointing targets for improved treatment. The biomarkers obtained represent a promising tool to discriminate between HRT users and non-users. Conclusion: According to a tentative identification of the markers by their molecular weight and binding characteristics, most of them appear to be part of the inflammation induced acute-phase response. (c) 2004 Elsevier Ireland Ltd. All rights reserved Y1 - 2004 ER - TY - JOUR A1 - Warschburger, Petra A1 - Busch, S. A1 - Bauer, C. P. A1 - Kiosz, D. A1 - Stachow, R. A1 - Petermann, Franz T1 - Health-related quality of life in children and adolescents with asthma : results from the ESTAR study N2 - Our aim was to assess the psychosocial well-being of asthmatic children and adolescents, the influencing factors, and to determine the effect of inpatient rehabilitation on their quality of life; 226 asthmatic children and adolescents participated in the inpatient rehabilitation (IG). The comparison group (CG) included 92 asthmatic children and adolescents receiving standard medical treatments. Patients were aged between 8 and 16 years and were predominantly male. The health-related quality of life was measured with the German version of the "Paediatric Asthma Quality of Life Questionnaire." Interviews were carried out for IG 2 weeks before the commencement of their inpatient stay and 1 year after their stay ended. The same time schedule was carried out for CG. All patients reported a mild to moderate impairment of their quality of life. Girls described a slightly lower quality of life than boys. With increasing asthma severity, quality of life decreased. Inpatients described a lower quality of life than CG at enrollment. Inpatient rehabilitation resulted in a greater improvement of quality of life over time for IG than for CG. Gender and severity status had no effect on this time course. The only modestly affected quality of life may reflect the good adaptation to the disease and medical treatment. Children and adolescents in the IG recorded improvements in their quality of life. Differences in quality of life based on gender and disease severity were not shown to influence the improvements. In summary, inpatient rehabilitation results in an improvement of health-related quality of life. Further research concerning the psychosocial situation of children and adolescents in this setting is needed Y1 - 2004 ER - TY - BOOK ED - Drexler, Peter ED - Kinsky-Ehritt, Andrea T1 - Identities and minorities : postcolonial readings T3 - Potsdamer Beiträge zur Kultur- und Sozialgeschichte Y1 - 2003 SN - 3-89626-292-0 VL - 1 PB - Trafo-Verl. CY - Berlin ER - TY - JOUR A1 - Selting, Margret T1 - Lists as embedded structures and the prosody of list construction as an interactional resource Y1 - 2003 ER - TY - JOUR A1 - Kelch, S. A1 - Lendlein, Andreas A1 - Müllen, A. A1 - Ridder, U. T1 - Textile Polymer Scaffolds for Tissue Engineering Y1 - 2003 ER - TY - JOUR A1 - Jasper, Willi T1 - Faust and the Germans Y1 - 2003 SN - 0-8204-6833-9 ER - TY - JOUR A1 - Wischer, Ilse T1 - On the origin and current status of African American vernacular english Y1 - 2003 SN - 3-89626-292-0 ER -