Re-structuring competetive metropolitan regions: on territory, institutions and governance. RheinRuhr compared with London, Paris and the Randstad Holland

Currently social and political constructed urban regions are about to approach a threefold role regarding their functional, economic and political function. At first they constitute a basis for economic and social life. What is next is their role as a vital relational asset to refine competitive advantages and thirdly they exemplify the significance of a new era of reflexive capitalism. One underlying consequence of the "new" interest concerning the de- and re-territorialisation of political economic activity is to consider the regional scale as a functional space for economic planning and political governance. Our intended contribution for the ERSA-Conference deals with the role of selected European Metropolitan Regions as "driving forces" for national and Europe`s competitiveness and the involved challenges for such urban regions to pool their resources and potentials in order to cerate some kind of "appropriate organising capacities". To do so, the authors would draw on the ongoing debate about the adequate analysis of regional political economies and on the empirical results produced within two recently finished international research projects (named as EURBANET and GEMACA II: both were executed under the umbrella of the INTERREG IIC operational programme for the North Western Metropolitan Area). Whilst GEMACA II focussed on the competitiveness of metropolitan regions, the EURBANET project took on board the possible contribution of polynuclear urban regions, such as RheinRuhr and the Delta Metropolis, in order to strengthen the regional competitiveness and quality of life. Additionally, their potential roles in transnational planning processes were under study. The planned paper would start with the observation that a great number of examinations on urban or city-regional economies reduce these "spatialities" to empirical given administrative bounded cities and simultaneously to a "container" for socio-economic processes. However, a "region" is comprehended as a historical contingent process and its emergence needs to be understood as a part of socio-spatial structure and collective consciousness of society. Questions of spatial scales, territorial shapes, institutional formations and cultural identities are thus given preference by a number of social scientists and human geographers. In order to respond to this perspective, the authors want to discuss three key factors of the economic development exemplified by four metropolitan regions (as named in the headline). 1. the territorial shape of comparable functional urban regions including the specific questions of the internal spatial shape (rather monocentric or polycentric configurations without a dominant core); 2. the present "economic performance" of the selected regions embedded in the discourse of "regional competitiveness"; 3. the importance of "appropriate" institutional and policy-making frameworks for effective metropolitan governance and governments by bringing together the mutual interests of various city-regional stakeholders.

Re-structuring competetive metropolitan regions: on territory, institutions and governance. RheinRuhr compared with London, Paris and the Randstad Holland

Currently social and political constructed urban regions are about to approach a threefold role regarding their functional, economic and political function. At first they constitute a basis for economic and social life. What is next is their role as a vital relational asset to refine competitive advantages and thirdly they exemplify the significance of a new era of reflexive capitalism. One underlying consequence of the "new" interest concerning the de- and re-territorialisation of political economic activity is to consider the regional scale as a functional space for economic planning and political governance. Our intended contribution for the ERSA-Conference deals with the role of selected European Metropolitan Regions as "driving forces" for national and Europe`s competitiveness and the involved challenges for such urban regions to pool their resources and potentials in order to cerate some kind of "appropriate organising capacities". To do so, the authors would draw on the ongoing debate about the adequate analysis of regional political economies and on the empirical results produced within two recently finished international research projects (named as EURBANET and GEMACA II: both were executed under the umbrella of the INTERREG IIC operational programme for the North Western Metropolitan Area). Whilst GEMACA II focussed on the competitiveness of metropolitan regions, the EURBANET project took on board the possible contribution of polynuclear urban regions, such as RheinRuhr and the Delta Metropolis, in order to strengthen the regional competitiveness and quality of life. Additionally, their potential roles in transnational planning processes were under study. The planned paper would start with the observation that a great number of examinations on urban or city-regional economies reduce these "spatialities" to empirical given administrative bounded cities and simultaneously to a "container" for socio-economic processes. However, a "region" is comprehended as a historical contingent process and its emergence needs to be understood as a part of socio-spatial structure and collective consciousness of society. Questions of spatial scales, territorial shapes, institutional formations and cultural identities are thus given preference by a number of social scientists and human geographers. In order to respond to this perspective, the authors want to discuss three key factors of the economic development exemplified by four metropolitan regions (as named in the headline). 1. the territorial shape of comparable functional urban regions including the specific questions of the internal spatial shape (rather monocentric or polycentric configurations without a dominant core); 2. the present "economic performance" of the selected regions embedded in the discourse of "regional competitiveness"; 3. the importance of "appropriate" institutional and policy-making frameworks for effective metropolitan governance and governments by bringing together the mutual interests of various city-regional stakeholders

Steuern als Mittel der Einkommenspolitik

In der Auseinandersetzung um die Lösung stabilitätspolitischer Probleme wird seit den 70er Jahren in den Vereinigten Staaten der Vorschlag diskutiert, die Globalsteuerung durch den Einsatz der Steuerpolitik mikroökonomisch zu ergänzen. Allen Vorschlägen einer «tax-based incomes policy» ist der Zweck gemeinsam, dafür zu sorgen, dass die Kosten stabilitätswidrigen Verhaltens bei mikroökonomischen Lohn- und Preisentscheidungen einbezogen werden sollen. In der vorliegenden Untersuchung werden die Voraussetzungen dieser Ansätze herausgearbeitet und die Wirkungen auf Allokation, Distribution und Stabilität untersucht

Application of the Sm-Nd Isotope System to the Late Quaternary Paleoceanography of the Yermak Plateau (Arctic Ocean)

By storing and transporting vast amounts of energy derived from solar insolation, the oceans play an important role in shaping Earth’s climate. On the largest scale, ocean currents smooth the temperature gradients between the equator and the poles by redistributing excess energy from the tropics to higher latitudes. Much of this excess heat is transported by the so-called Ocean Conveyor Belt (Broecker, 1991), a global network of ocean currents driven by thermohaline convection. Changes in the pattern and strength of thermohaline circulation affect the redistribution of heat, and thereby significantly influence climate on local to global scales. The reconstruction of paleocurrents has long been a subject of paleoceanographic research. Among the various methods employed in tracing paleocurrents (and modern currents), the Sm-Nd isotope system is experiencing ever increasing attention. First applied in an oceanographic context by O’Nions et al. (1978), it is by now established as a standard tool, as shown by numerous recent publications (e.g. Rutberg et al., 2000; Tütken et al., 2002; Weldeab et al., 2002; Benson et al., 2003; Farmer and Barber, 2003; Piotrowski et al., 2004; Bayon et al., 2002, 2003, 2004; Lacan and Jeandel, 2001, 2004, 2005, and many more). Two lines of application of the Sm-Nd isotope system to oceanography/paleoceanography can be distinguished, both of which were followed for this thesis. The first approach uses the isotopic composition of Sm and Nd hosted in detrital minerals to infer the provenance of terrigenous sediments. This information can be used to draw conclusions about the direction and distance of sediment delivery. The second approach uses the isotopic signature of Nd as a tracer of different water masses. Due to the oceanic residence time of Nd being shorter than the global turnover rate of seawater (500-1000 years vs ~1000 years; Tachikawa et al., 2003), different bodies of water acquire distinct Nd isotopic signatures as a function of the age of adjacent continents. Apart from directly analyzing the Nd isotopic compositions of water samples to trace the modern distribution of different watermasses (e.g. Lacan and Jeandel, 2001, 2004), suitable archives of seawater-derived Nd can be employed to study paleocurrents. Possible archives are fossil remains of marine organisms (e.g. foraminifers; Burton and Vance, 2000), or, most widely used for the recent geological past, Fe-Mn nodules and crusts (e.g. Frank et al., 2002). With slow growth rates on the order of mm/Ma, however, Fe-Mn nodules do not offer the high temporal resolution necessary to study Late Quaternary climate change. Attention has therefore recently turned to authigenic Fe-Mn oxyhydroxides finely dispersed throughout the sediment column (e.g. Rutberg et al., 2000; Bayon et al., 2002, 2003, 2004; Piotrowski et al., 2004). For this thesis, both lines of application of the Sm-Nd isotope system to paleoceanography were followed. The samples were taken from a sediment core collected from the Yermak Plateau in the north-eastern Fram Strait. Situated between Greenland and the Svalbard Archipelago, the Fram Strait is the only deep connection between the Arctic Ocean and, via the Greenland-Iceland-Norwegian (Nordic) Seas, the North Atlantic. The Nordic Seas are an area of deep-water formation important for the global thermohaline circulation. There, the processes of deep-water formation are in a state of equilibrium that is most sensitive to changes in surface water salinity, which, in turn, is strongly influenced by the outflow of water of low salinity from the Arctic Ocean. This makes the history of water exchange between the Atlantic and the Arctic Ocean through the Fram Strait a subject of key interest for climate research. In particular, it was attempted to reconstruct the provenance of sediments deposited on the western Yermak Plateau over the last 129 000 years. This was done by analyzing samples from the sediment core and from potential source areas for their Sm-Nd isotopic compositions. The current understanding is that under present interglacial conditions sediment is delivered to the Yermak Plateau by ice drift from the Siberian shelf areas (Kara- and Laptev Sea) and as suspended load of Atlantic water advected from the south. To resolve these assumed differences in provenance and transport mechanism, the majority of the samples was split into the grain-size fractions clay, fine silt, coarse silt, and sand for Sm-Nd analyses. The position of the investigated core on the upper slope of the western Yermak Plateau limits delivery of sand-size (or coarser) material to ice rafting. The sand fractions of the core samples were therefore interpreted to be exclusively of ice rafted origin, and thus used as an indicator of changes in the pattern of surface currents. Clay- to silt-size material, on the other hand, yields a mixed signal of ice rafting and suspended-load delivery. Based on a comparison of the isotopic compositions of the core samples with those of the samples from potential source areas, a number of conclusions can be drawn: Most core sample show only little isotopic variation between their constituent size fractions (mostly less than analytical uncertainty). Only sand fractions show considerable differences. This can probably be explained by the sand samples’ small sample size relative to their coarse grain size; as a result, most sand fractions probably are not representative. The generally good agreement between the isotopic compositions suggests a common origin of ice rafted detritus (IRD) and suspended load. The possibility of suspended particulate matter transport from the Siberian shelf areas of the Kara- and Laptev Seas to the Yermak Plateau in significant amounts can be excluded. An origin of IRD in the Kara and Laptev Sea is therefore equally unlikely. Instead, a common provenance of IRD and suspended particulate matter from the Svalbard/Barents Sea area is a plausible scenario, supported by isotope-independent data from the literature (e.g. grain-size distribution, mineralogical composition, faunal abundance, etc.). The moderate downcore Nd isotopic variation suggests that, despite repeated large-scale glaciations in the Svalbard/Barents Sea area, the general modern-type circulation in the Fram Strait area has been active for most of the last 129 000 years. The largest deviation from modern conditions is indicated for the peak of the last glacial phase, approximately 20 000 years ago. Then, large amounts of IRD were delivered to the Yermak Plateau by icebergs calving from the Scandinavian ice sheet. Moreover, the occurrence of chalk fragments confirms iceberg drift from as far south as the North Sea. A similar finding has previously been reported for samples from the southern Fram Strait by Spielhagen (1991). Regarding the second analytical approach, i.e. the Nd isotopic analysis of finely dispersed authigenic Fe-Mn oxyhydroxides, implementation of the experimental technique was targeted first. The method of Fe-Mn oxyhydroxide extraction by means of leaching with a mixed reagent (acetic acid and hydroxylamine-hydrochloride) largely is based on the work of Chester and Hughes (1967). Modifications of their method have been reported in Tessier et al. (1979), Chao and Zhou (1983), and Hall et al. (1996), and have recently been compared by Bayon et al. (2002). Based on the experimental protocol described by Bayon et al. (2002), five core samples were processed and analyzed for their rare earth element (REE) concentrations by ICP-MS at the European Union Large Scale Geochemical Facility at the University of Bristol, England, financed by the EU. In addition, nine core samples were processed and the leachates analyzed for their Nd isotopic composition in Munich. The REE patterns of the leachates show an enrichment of the middle REE that is atypical for authigenic Fe-Mn phases. The isotopic analysis also yielded controversial results: downcore, the Nd isotope curves for the leachates and the detrital phases run approximately parallel, suggesting a systematic genetic relationship between the analyzed Nd fractions. A similar relationship appears to exist between data reported in Rutberg (2000), Rutberg et al. (2000), and Piotrowski et al. (2004) for a sediment core from the south-eastern Atlantic. To answer the questions raised by these controversial results, a sequential leaching experiment was designed. Several aliquots of one core sample were treated for different durations with different concentrations of the leaching reagents, and at intermediate steps were analyzed for their Sm-Nd isotopic composition. The results of this leaching experiment point towards a conceptual weakness of the method. In order to avoid contamination by non-authigenic sediment components, all experimental methods described in the literature focus on adjusting the concentration of the hydroxylamine-hydrochloride used to reduce Fe and Mn to their soluble states. This approach, however, does not take into account the dissolution of acid-soluble phases by acetic acid, which in all cases is used at a strength of 4.4 mol·l-1. Consequently, the leaching reagent is sufficiently corrosive to attack easily-soluble detrital minerals and release non-seawater-derived Nd (Hannigan and Sholkovitz, 2001; Dubinin and Strekopytov, 2001). Phosphatic phases are therefore a likely source of nonseawater-derived Nd. Apatite, for instance, is a common component of clastic sedimentary rocks, is easily dissolved by weak acids, and can account for the middle REE enrichment in the leachates. Its high Nd concentrations would mask any seawater signal. To conclude, it appears as though the available extraction techniques are not yet sufficiently refined to reliably determine the Nd isotopic composition of finely dispersed Fe-Mn oxyhydroxides as a proxy for paleoseawater composition

Statistik der Beschäftigten im diakonischen Dienst

Anlaß für die vorgestellte Statistik ist das vorhandene Defizit an Daten über die Zusammensetzung der Mitarbeiterschaft in den Einrichtungen der Diakonie, insbesondere im Zusammenhang mit der anhaltenden Diskussion über den Pflegebereich in den Medien. Mit der aus einer Sekundärerhebung erarbeiteten und und hier vorgestellten Mitarbeiterstatistik werden Aussagen über die Altersstruktur, die Beschäftigungsdauer bzw. die Fluktuation, die qualifizierte Ausbildung, die Tätigkeit einzelner Berufsgruppen, die tarifliche Eingruppierung sowie die geschlechtsspezifische Zusammensetzung der im Diakonischen Werk tätigen Arbeitskräfte gewonnen. (ICH

Verzweigung periodischer Lösungen bei rein nichtlinearen Differentialgleichungssystemen in der Ebene

Zusammenfassung:In dieser Arbeit werden die Abzweigung stationärer Punkte und periodischer Lösungen von isolierten stationären Punkten rein nichtlinearer Differentialgleichungen in der reellenEbene betrachtet.Das erste Kapitel enthält einige technische Hilfsmittel, während im zweiten ausführlich das Verhalten von Differentialgleichungen in der Ebene mit zwei homogenen Polynomen gleichen Grades als rechter Seite diskutiert wird.Im dritten Kapitel beginnt der Hauptteil der Arbeit. Hier wird eine Verallgemeinerung des Hopf'schen Verzweigungssatzes bewiesen, der den klassischen Satz als Spezialfall enthält.Im vierten Kapitel untersuchen wir die Abzweigung stationärer Punkte und im letzten Kapitel die Abzweigung periodischer Lösungen unter Störungen, deren Ordnung echt kleiner ist, als die erste nichtverschwindende Näherung der ungestörten Gleichung.Alle Voraussetzungen in dieser Arbeit sind leicht nachzurechnen und es werden zahlreiche Beispiele ausführlich diskutiert.Abstract:In this work we examine the bifurcation of stationary points and periodic solutions from isolated stationary points under disturbances of purely nonlinear autonomous differential equations in the real plane.The first chapter contains some lemmata, necessary and useful for the following four chapters.In the second chapter the behavior of differential equations in the real plane with two homogeneous polynoms of same degree as right side is discussed. The main part of this work starts in the third chapter, where a generalization of the famous bifurcation theorem of E. Hopf is shown, which contains the classical result as a special case.In the fourth chapter we analyze the bifurcation of stationary points and in the last chapter the bifurcation of periodic solutions under disturbances, the order of which isreally less than the first nonvanishing terms of the undisturbed equation.All conditions in the propositions of our theorems are easy to calculate and a lot of explicit examples are given in detail

Diffusion based degradation mechanisms in giant magnetoresistive spin valves

Spin valve systems based on the giant magnetoresistive (GMR) effect as used for example in hard disks and automotive applications consist of several functional metallic thin film layers. We have identified by secondary ion mass spectrometry (SIMS) two main degradation mechanisms: One is related to oxygen diffusion through a protective cap layer, and the other one is interdiffusion directly at the functional layers of the GMR stack. By choosing a suitable material as cap layer (TaN), the oxidation effect can be suppressed.Comment: 3 pages, 3 figures. to be published in Appl. Phys. Let

Steuern als Mittel der Einkommenspolitik

In der Auseinandersetzung um die Lösung stabilitätspolitischer Probleme wird seit den 70er Jahren in den Vereinigten Staaten der Vorschlag diskutiert, die Globalsteuerung durch den Einsatz der Steuerpolitik mikroökonomisch zu ergänzen. Allen Vorschlägen einer «tax-based incomes policy» ist der Zweck gemeinsam, dafür zu sorgen, dass die Kosten stabilitätswidrigen Verhaltens bei mikroökonomischen Lohn- und Preisentscheidungen einbezogen werden sollen. In der vorliegenden Untersuchung werden die Voraussetzungen dieser Ansätze herausgearbeitet und die Wirkungen auf Allokation, Distribution und Stabilität untersucht