TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Pibaljommee, Bundit T1 - Clones of implicit operations N2 - There is a close connection between a variety and its clone. The clone of a variety is a multibased algebra, where the different universes are the sets of n-ary terms over this variety for every natural number n and where the operations describe the superposition of terms of different arities. All projections are added as nullary operations. Subvarieties correspond to homomorphic images of clones. Subclones can be described by reducts of varieties, isomorphic clones by equivalent varieties. Clone identities correspond to hyperidentities and varieties of clones to hypervarieties. Pseudovarieties are classes of finite algebras which are closed under taking of subalgebras, homomorphic images and finite direct products. Pseudovarieties are important in the theories of finite state automata, rational languages, finite semigroups and their connections. In a very natural way, there arises the question for the clone of a pseudovariety. In the present paper, we will describe this algebraic structure Y1 - 2005 SN - 0002-5240 ER - TY - JOUR A1 - Denecke, Klaus-Dieter A1 - Radelecki, S. A1 - Ratanaprasert, C. T1 - On constantive simple and order-primal algebras N2 - A finite algebra A = (A; F-A) is said to be order-primal if its clone of all term operations is the set of all operations defined on A which preserve a given partial order <= on A. In this paper we study algebraic properties of order-primal algebras for connected ordered sets (A; <=). Such order-primal algebras are constantive, simple and have no non-identical automorphisms. We show that in this case F-A cannot have only unary fundamental operations or only one at least binary fundamental operation. We prove several properties of the varieties and the quasi-varieties generated by constantive and simple algebras and apply these properties to order-primal algebras. Further, we use the properties of order-primal algebras to formulate new primality criteria for finite algebras Y1 - 2005 ER - TY - JOUR A1 - Changphas, Thawhat A1 - Denecke, Klaus-Dieter T1 - Green's relation R on the monoid of clone endomorphisms N2 - A hypersubstitution is a map which takes n-ary operation symbols to n-ary terms. Any such map can be uniquely extended to a map defined on the set W-tau(X) of all terms of type tau, and any two such extensions can be composed in a natural way. Thus, the set Hyp(tau) of all hypersubstitutions of type tau forms a monoid. In this paper, we characterize Green's relation R on the monoid Hyp(tau) for the type tau = (n, n). In this case, the monoid of all hypersubstitutions is isomorphic with the monoid of all Clone endomorphisms. The results can be applied to mutually derived varieties Y1 - 2005 SN - 1005-3867 ER - TY - JOUR A1 - Kumke, Michael Uwe A1 - Eidner, Sascha A1 - Krüger, Tobias T1 - Fluorescence quenching and luminescence sensitization in complexes of Tb3+ and Eu3+ with humic substances N2 - Intrinsic fluorescence quenching of humic substances (HS) and the sensitization of Ln(3+) luminescence (Ln3+ Tb3+, Eu3+) in HS complexes were investigated. Both measurements yielded complementary information on the complexation of metals by HS. Large differences between fulvic acids(FA)and humic acids (HA) were found. From time-resolved luminescence measurements it is concluded that a combination of energy transfer and energy back transfer between HS and Ln(3+) is responsible for the observed luminescence decay characteristics. In the case of Eu3+, an additional participation of charge-transfer states is suggested. A new concept for the evaluation of the sensitized luminescence decays of Ln(3+) was adapted Y1 - 2005 ER - TY - GEN A1 - Kehr, Julia T1 - Untersuchungen der Proteine in den Langstreckentransportsystemen höherer Pflanzen Y1 - 2005 CY - Potsdam ER - TY - JOUR A1 - Christensen, Lise Bech A1 - Schulte-Ladbeck, R. E. A1 - Sanchez, Sebastian F. A1 - Becker, Thomas A1 - Jahnke, Knud A1 - Kelz, A. A1 - Roth, Martin M. A1 - Wisotzki, Lutz T1 - Abundances and kinematics of a candidate sub-damped Lymana galaxy toward PHL 1226 N2 - The spectrum of the quasar PHL 1226 is known to have a strong Mg II and sub-damped Lymanalpha (sub-DLA) absorption line system with N(H I) = (5 +/- 2) x 10(19) cm(-2) at z = 0.1602. Using integral field spectra from the Potsdam Multi Aperture Spectrophotometer (PMAS) we investigate a galaxy at an impact parameter of 6".4 which is most probably responsible for the absorption lines. A fainter galaxy at a similar redshift and a slightly larger distance from the QSO is known to exist, but we assume that the absorption is caused by the more nearby galaxy. From optical Balmer lines we estimate an intrinsic reddening consistent with 0, and a moderate star formation rate of 0.5 M-circle dot yr(-1) is inferred from the Ha luminosity. Using nebular emission line ratios we find a solar oxygen abundance 12 + log (O/H) = 8.7 +/- 0.1 and a solar nitrogen to oxygen abundance ratio log (N/O) = -1.0 +/- 0.2. This abundance is larger than those of all known sub-DLA systems derived from analyses of metal absorption lines in quasar spectra. On the other hand, the properties are compatible with the most metal rich galaxies responsible for strong Mg II absorption systems. These two categories can be reconciled if we assume an abundance gradient similar to local galaxies. Under that assumption we predict abundances 12 + log (O/H) = 7.1 and log (N/O) = -1.9 for the sub-DLA cloud, which is similar to high redshift DLA and sub-DLA systems. We find evidence for a rotational velocity of similar to200 km s(-1) over a length of similar to7 kpc. From the geometry and kinematics of the galaxy we estimate that the absorbing cloud does not belong to a rotating disk, but could originate in a rotating halo Y1 - 2005 ER - TY - JOUR A1 - Dörfler, Thomas T1 - Geographie und Dekonstruktion BT - zu einem zeitgenössischen Missverständnis JF - Geographische Revue : Zeitschrift für Literatur und Diskussion N2 - Inhalt: - Der Ort - Das Symptom - Der Jargon des Vermeintlichen, oder: vermeintliche Philosophie - Was ist: Dekonstruktion? - Zur Genese - Dekonstruktion und Geographie - Grenz-Philosophie - Die Welt als Text - Versuch über die Grenze, in geographischer Absicht Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-31098 SN - 1438-3039 VL - 7 IS - 1/2 SP - 67 EP - 85 ER - TY - JOUR A1 - Schneider, Hans Julius T1 - Speaking about the interior : a look at Gerhard Roth with Ludwig Wittgestein Y1 - 2005 ER - TY - JOUR A1 - Räder, Andy A1 - Schubarth, Wilfried A1 - Resch-Esser, Ursula A1 - Kube, Christian A1 - Strigin, Natalia A1 - Finschow, Michael A1 - Bode, Anja A1 - Püschel, Almuth T1 - Portal = Zukunftsinvestition: Förderung des wissenschaftlichen Nachwuchses BT - Die Potsdamer Universitätszeitung N2 - Aus dem Inhalt: - Zukunftsinvestition: Förderung des wissenschaftlichen Nachwuchses - Nobelpreisträger in Potsdam - Aktionen gegen Studiengebühren - Erdbebenanalyse in Minuten T3 - Portal: Das Potsdamer Universitätsmagazin - 07-09/2005 Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-439906 SN - 1618-6893 IS - 07-09/2005 ER - TY - JOUR A1 - Ullrich, Sylvia A1 - Winter, Jean-Pierre A1 - Schrul, Barbara A1 - Dölling, Irene A1 - Ludwig, Joachim A1 - Schnabel, Patrick Roger T1 - Portal = Karriere und Familie: Eine Gratwanderung BT - Die Potsdamer Universitätszeitung N2 - Aus dem Inhalt: - Karriere und Familie: Eine Gratwanderung - Studierende werfen kritischen Blick auf ihre Fakultät - Wie E-Learning das Studium verändert - Mit System Erde bei Exzellenzinitiative punkten T3 - Portal: Das Potsdamer Universitätsmagazin - 10-12/2005 Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-439915 SN - 1618-6893 IS - 10-12/2005 ER - TY - JOUR A1 - Kroner, Alfred A1 - Wilde, S. A. A1 - O'Brien, Patrick J. A1 - Li, J. H. A1 - Passchier, C. W. A1 - Walte, N. P. A1 - Liu, Dun Yi T1 - Field relationships, geochemistry, zircon ages and evolution of a late Archaean to Palaeoproterozoic lower crustal section in the Hengshan Terrain of northern China N2 - The Hengshan complex forms part of the central zone of the North China Craton and consists predominantly of ductilely-deformed late Archaean to Palaeoproterozoic high-grade, partly migmatitic, granitoid orthogneisses, intruded by mafic dykes of gabbroic composition. Many highly strained rocks were previously misinterpreted as supracrustal sequences and represent mylonitized granitoids and sheared dykes. Our single zircon dating documents magmatic granitoid emplacement ages between 2.52 Ga and 2.48 Ga, with rare occurrences of 2.7 Ga gneisses, possibly reflecting an older basement. A few granitic gneisses have emplacement ages between 2.35 and 2.1 Ga and show the same structural features as the older rocks, indicating that the main deformation occurred after similar to 2.1 Ga. Intrusion of gabbroic dykes occurred at similar to 1920 Ma, and all Hengshan rocks underwent granulite-facies metamorphism at 1.88-1.85 Ga, followed by retrogression, shearing and uplift. We interpret the Hengshan and adjacent Fuping granitoid gneisses as the lower, plutonic, part of a late Archaean to early Palaeoproterozoic Japan-type magmatic arc, with the upper, volcanic part represented by the nearby Wutai complex. Components of this arc may have evolved at a continental margin as indicated by the 2.7 Ga zircons. Major deformation and HP metamorphism occurred in the late Palaeoproterozoic during the Luliang orogeny when the Eastern and Western blocks of the North China Craton collided to form the Trans-North China orogen. Shear zones in the Hengshan are interpreted as major lower crustal discontinuities post-dating the peak of HP metamorphism, and we suggest that they formed during orogenic collapse and uplift of the Hengshan complex in the late Palaeoproterozoic (< 1.85 Ga) Y1 - 2005 SN - 1000-9515 ER - TY - JOUR A1 - O'Brien, Patrick J. A1 - Walte, N. P A1 - Li, J. H. T1 - The petrology of two distinct granulite types in the Hengshan Mts, China, and tectonic implications N2 - The Archean to Proterozoic Hengshan Complex (North China Craton), comprises tonalitic and granodioritic gneisses with subordinate mafic lenses, pegmatites and granites. Amphibolite facies assemblages predominate, although granulite-facies relics are widespread, and greenschist-facies retrogression occurs in km-wide shear zones. Mafic lenses, locally abundant, occur as strongly deformed amphibolite (hornblende + plagioclase) boudins or sheets. In contrast to previously published models we find two series of mafic rocks with distinctly different granulite-facies evolutions. In the north of the complex, relict high-pressure mafic granulites are garnet + clinopyroxene-bearing rocks with a secondary development of orthopyroxene around both garnet (kelyphites) and clinopyroxene (coronas). South of the newly defined central, E-W-trending, Zhujiafang shear zone, numerous mafic boudins and less-deformed dykes exhibit a macroscopically visible magmatic texture with coronitic growth of metamorphic garnet (full of quartz inclusions) between the magmatic plagioclase and pyroxene domains. Additional orthopyroxene (after magmatic augite) and sodic rims to magmatic plagioclase clearly indicate medium-pressure granulite-facies metamorphism. These findings suggest tectonic juxtaposition in this area of three different structural levels of the same Proterozoic-imprinted crust: high-pressure granulite grade in the northern Hengshan, medium-pressure granulite grade in the southern Hengshan and amphibolite- to greenschist-facies grade in the Wutaishan to the SE. (c) 2004 Elsevier Ltd. All rights reserved Y1 - 2005 SN - 1367-9120 ER - TY - JOUR A1 - Konrad-Schmolke, Matthias A1 - Handy, Mark R. A1 - Babist, Jochen A1 - O'Brien, Patrick J. T1 - Thermodynamic modelling of diffusion-controlled garnet growth N2 - Numerical thermodynamic modelling of mineral composition and modes for specified pressure-temperature paths reveals the strong influence of fractional garnet crystallisation, as well as water fractionation, on garnet growth histories in high pressure rocks. Disequilibrium element incorporation in garnet due to the development of chemical inhomogeneities around porphyroblasts leads to pronounced episodic growth and may even cause growth interruptions. Discontinuous growth, together with pressure- and temperature-dependent changes in garnet chemistry, cause zonation patterns that are indicative of different degrees of disequilibrium element incorporation. Chemical inhomogeneities in the matrix surrounding garnet porphyroblasts strongly affect garnet growth and lead to compositional discontinuities and steep compositional gradients in the garnet zonation pattern. Further, intergranular diffusion-controlled calcium incorporation can lead to a characteristic rise in grossular and spessartine contents at lower metamorphic conditions. The observation that garnet zonation patterns diagnostic of large and small fractionation effects coexist within the same sample suggests that garnet growth is often controlled by small-scale variations in the bulk rock chemistry. Therefore, the spatial distribution of garnet grains and their zonation patterns, together with numerical growth models of garnet zonation patterns, yield information about the processes limiting garnet growth. These processes include intercrystalline element transport and dissolution of pre-existing grains. Discontinuities in garnet growth induced by limited element supply can mask traces of the thermobarometric history of the rock. Therefore, thermodynamic modelling that considers fractional disequilibrium crystallisation is required to interpret compositional garnet zonation in terms of a quantitative pressure and temperature path of the host rock Y1 - 2005 SN - 0010-7999 ER - TY - BOOK A1 - Marienfeld, Daniel A1 - Sogomonyan, Egor S. A1 - Ocheretnij, V. A1 - Gössel, Michael T1 - Self-checking Output-duplicated Booth-2 Multiplier T3 - Preprint / Universität Potsdam, Institut für Informatik Y1 - 2005 SN - 0946-7580 VL - 2005, 1 PB - Univ. CY - Potsdam ER - TY - BOOK A1 - Börner, Ferdinand A1 - Gössel, Michael T1 - Grundlagen digitaler Systeme Y1 - 2005 SN - 978-3-937786-46-9 PB - Univ.-Verl. CY - Potsdam ER - TY - GEN A1 - Zimmering, Raina T1 - Das mexikanische Militär : von der Revolutionsarmee zur Polizeikraft T1 - Mexico : a revolutionary army becomes police force N2 - The military in Mexico started out as a revolutionary army that secured the regime of the governmental party PRI. The article discusses the change of this army into a national and hemispheric police force under the influence of the USA. Today, the functions of the Mexican army are a mix of fighting against drugs, organized delinquency, terrorism and counterinsurgency and cooperating with US as well as other Latin American forces. KW - Lateinamerika KW - Mexiko KW - Militär KW - USA KW - Widerstand KW - Latin America KW - Mexico KW - military KW - USA KW - counterinsurgency Y1 - 2005 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-48258 ER - TY - THES A1 - Raters, Marie-Luise T1 - Kunst, Wahrheit und Gefühl : Schelling, Hegel und die Ästhetik des angselsächsichen Idealismus Y1 - 2005 SN - 3-495-48177-X PB - Alber CY - Freiburg ER - TY - JOUR A1 - Crome, Erhard T1 - Kann es ein europäisches Sozialstaatsmodell geben? Y1 - 2005 SN - 3-932502-47- 7 ER - TY - JOUR A1 - Grobler, J. P. A1 - Hartl, G. B. A1 - Grobler, N. A1 - Kotze, A. A1 - Botha, K. A1 - Tiedemann, Ralph T1 - The genetic status of an isolated black wildebeest (Connochaetes gnou) population from the Abe Bailey Nature Reserve, South Africa : Microsatellite data on a putative past hybridization with blue wildebeest (C-taurinus) N2 - The present study aimed at assessing genetic purity of black wildebeest (Connochoetes gnou) at Abe Bailey Nature Reserve, Gauteng Province, South Africa, using a multitocus microsatellite approach. Five loci were studied in black and blue (C. taurinus) wildebeest, the latter being a closely related species and known to produce hybrids with the morphologically very similar black wildebeest. In fact, the entire national black wildebeest population of South Africa potentially contains a significant proportion of introgressed blue wildebeest genes. In our case, eight out of 39 alleles were unique to black and 22 to blue wildebeest, with nine alleles shared between pure populations of the two species in Line with their taxonomic proximity. A possible Limited past introgression of blue wildebeest genes into the Abe Bailey population, corresponding to documents on population history, was only supported by the presence of a single allele otherwise exclusively found in samples of four pure blue but not in samples of two pure black wildebeest control populations. However, an assignment test and coefficients of population divergence did not support an extended introgression of C. taurinus alleles into the C. gnou population under study. Average heterozygosity at Abe Bailey proved to be intermediate between black and blue wildebeest, the tatter species generally harbouring more genetic variation than the former owing to larger population sizes and the absence of population bottlenecks in historical times. The implications of our data are discussed with reference to the persistence of introgressed genes and the conservation of pure black wildebeest gene pools Y1 - 2005 SN - 1616-5047 ER - TY - JOUR A1 - Wels, Volkhard T1 - Zur Vorgeschichte des Begriffs der 'kreativen Phantasie' JF - Zeitschrift für Ästhetik und allgemeine Kunstwissenschaft JF - Journal for aesthetics and general art history N2 - Gegen die gängige Vorstellung von der ‚kreativen Phantasie‘ als dem schöpferischen Vermögen des Dichters argumentiert der Aufsatz, dass erst mit der Frühromantik die Phantasie zum kreativen Vermögen erklärt wird, davor jedoch die Vernunft als kreatives Vermögen galt. In der Fakultätenpsychologie des Mittelalters und der Frühen Neuzeit wurde die imaginatio als ein rein passives Vorstellungsvermögen der Vernunft nicht entgegengestellt, sondern ihr übergeordnet, indem sich die Vernunft der Phantasie als bildgebendem Verfahren bediente. Während das Ergebnis der Phantasie seit der Frühromantik als ästhetisches ‚Werk‘ im emphatischen Sinne gilt, war das Ergebnis der dichtenden Vernunft ein Argument im logischen Sinne, das Prozess der inventio gefunden worden war. Erst Anfang des 18. Jahrhunderts entwickelt sich dann der Begriff der ‚kreativen Phantasie‘ aus dem rhetorischen Konzept der Anschaulichkeit (evidentia). KW - Begriffsgeschichte der Phantasie KW - Vorstellungsvermögen KW - Poetik KW - Rhetorik KW - Kreativität Y1 - 2005 SN - 0044-2186 SN - 2366-0740 VL - 50 IS - 2 SP - 199 EP - 226 PB - Felix Meiner Verlag CY - Hamburg ER -