To issue of ensuring of competitiveness of domestic turbogenerators

Рассмотрены направления проведения работ по совершенствованию конструкций отечественных турбогенераторов с целью сохранения их конкурентоспособности на мировом рынке за счет использования современных достижений в области крупного электромашиностроения, в частности, путем замены в крупных турбогенераторах водородного охлаждения на воздушное и совершенствования конструктивных элементов.Areas of work on improving the design of domestic turbogenerators are considered to retain their competitiveness in the global market through the use of the latest achievements in the field of large electric machines. This can be achieved by replacing the cooling by hydrogen on the air cooled in large turbogenerators and improvement of the structural elements

Solvothermalsynthese von Selenoantimonaten und Polychalkogeniden

Die präparativen Arbeiten im ternären System M/Sb/Se (M = Cr, Mn, Fe) unter milden Solvothermalbedingungen führten unter Verwendung von 1,2-Ethandiamin (en) als Lösungsmittel zu einer Reihe neuer Verbindungen. Die Reaktion von elementarem Selen mit Antimon und einem Übergangsmetall in en führt in der Regel zu Strukturen, die isolierte SbSe4(3-)-Anionen und verzerrt oktaedrisch koordinierte Metallkationen enthalten. Polyselenide und -telluride wurden aus Alkalipolychalkogenid, elementarem Chalkogen und einem Übergangsmetallsalz in en als Lösungsmittel erhalten. Die Verbindungen wurden thermisch charakterisiert und die Kristallstrukturen bestimmt

Prognosis of future groundwater recharge in the Federal State of Lower Saxony (Germany) under changed climate conditions

KEY WORDS groundwater recharge, climate changeABSTRACTAccording to current climate projections, the Federal State of Lower Saxony, Germany is at risk for changes in the hydrological budget. These changes are expected to have direct impacts on the long-term water availability for e.g. agricultural productivity and drinking water supply. In the southeastern part for instance agricultural production is only possible by means of field irrigation using groundwater, especially during dry summers. It can be foreseen that the future management of water resources has to consider appropriate adaptation measures in order to feed the water demand of the different sectors. The main target of a research project carried out jointly with LBEG is the prognosis of the possible impact of climate change on groundwater availability and irrigation needs in Lower Saxony. For this purpose, the water balance model GROWA has been enhanced to the mGROWA-model (Herrmann et al., 2013) which is able to simulate runoff components (e.g. groundwater recharge) in daily time-steps and with high spatial resolution (100 m grid). The mGROWA-model will be briefly introduced and its application to Lower Saxony will be presented. The first simulation performed based on climate data from the past (1971-2000). Special attention will be paid to the simulated temporal variable water content in the root zone and thus to percolation water fluxes and irrigation needs. Finally, the future groundwater recharge (until 2100) is forecasted using climate data of the RCM WETTREG (2010). References:Herrmann, F., Chen, S., Heidt, S., Elbracht, J., Engel, N., Kunkel, R., Müller, U., Röhm, H., Wendland, F. (2013): Zeitlich und räumlich hochaufgelöste flächendifferenzierte Simulation des Landschaftswasserhaushalts in Niedersachsen mit dem Model mGROWA. Hydrologie und Wasserbewirtschaftung (submitted for publication)

Koppelung agrarökonomischer und hydrologischer Modelle

The objective of the paper is to show the potential of interdisciplinary model networks consisting of agricultural economic and natural science models performing integrated impact assessments of agri-environmental policies. The potentials are exemplified using a coupling of the agricultural sector model RAUMIS with the hydrological models GROWA98 and WEKU in the scope of diffuse agricultural nitrogen immission into waterbodies. A brief classification of applied indicators is given. A key element for policy impact analyses are the relationships between the environmental indicator categories Driving Force, State and Response. The major relationships within this environmental scope as well as the modeling are explained. The presented model network represents a first area wide, regionally differentiated, consistent link-up between the Driving Force indicator “nitrogen balance surplusâ€, the State indicator “nitrogen(nitrate)concentration†and the response indicators. The results show that due to the local characteristics quite different shares of the agricultural nitrogen surplus finally enters the ground and surface waters. Hence, assessing the trade-offs of agri-environmental water protection measures requires an inclusion of natural local characteristics. The integrated consideration of the complex relationships and a comprehensive implementation of local characteristics allows to develop more efficient water pollution control measures.model-based policy consulting, interdisciplinary model networks, agricultural sector model, diffuse agricultural nitrogen immissions, Agricultural and Food Policy, Environmental Economics and Policy,

MÖGLICHKEITEN UND GRENZEN DER POLITIKANALYSE ZUR UMSETZUNG DER WASSERRAHMENRICHTLINIE -- ANWENDUNG EINES HYDRO-ÖKONOMISCHEN MODELLVERBUNDES FÜR DAS WESER EINZUGSGEBIET

EU-Wasserrahmenrichtlinie, landwirtschaftliche Einträge in die Gewässer, hydroökonomische Modellierung, RAUMIS, kosteneffiziente Maßnahmen, Agricultural and Food Policy, Environmental Economics and Policy, Land Economics/Use,

Fachdidaktische Tagespraktika im Potsdamer Modell der Lehrerbildung: Erste Befunde zum Kompetenzerleben der Studierenden im ersten Unterrichtspraktikum

Der Beitrag befasst sich mit dem Kompetenzerleben von Lehramtsstudierenden der Universität Potsdam im Rahmen ihres Fachdidaktischen Tagespraktikums (FTP), in dem sie erstmals eigene Unterrichtserfahrungen sammeln. Ziel der Begleitstudie ist es, den Beitrag der Schulpraktischen Studien zum Kompetenzerwerb der Lehramtsstudierenden der Studiengänge „Lehramt für die Primarstufe“ und „Lehramt für die Sekundarstufen I und II (allgemeinbildende Fächer)“ zu erforschen und passgenaue Lehrveranstaltungs- und Begleitformate zu identifizieren. Hierfür wird eine Kohorte Lehramtsstudierender (N = 578) durch die fünf Schulpraktischen Studien des Potsdamer Modells der Lehrerbildung mit einer Online-Befragung begleitet. Für das FTP erweisen sich die „Unterrichtsbesprechungen“, die „Zusammenarbeit in der Kleingruppe“ und die „Seminaristische Begleitung“ als zentrale Parameter des Kompetenzerlebens, wobei die „Wichtigkeit der vorbereitenden, begleitenden und auswertenden Lehrveranstaltungen“ den stärksten Einfluss auf das Kompetenzerleben der Studierenden zeigt. Die drei Gelingensfaktoren und ihre Einflüsse auf die Kompetenzeinschätzung der Studierenden werden durch eine qualitative Analyse der offenen Rückmeldungen der Studierenden weiter untermauert. In der abschließenden Diskussion werden Folgerungen für die Weiterentwicklung der Schulpraktischen Studien erörtert

Groundwater recharge in Slovenia - Results of a bilateral German-Slovenian Research project

Groundwater is a resource of utmost strategic importance for Slovenia and Germany providing drinking water of good quality to its population. For decades, management of this key resource has received the highest priority of our national hydrological services. In the framework of the service activities in both countries, groundwater status in terms of quantity and quality has been observed and studied systematically for more than 50 years. In the eighties of the last century the first models forgroundwater recharge assessment at local and regional scale were developed. However, long time assessment of groundwater status and estimation of groundwater recharge for heterogeneous hydrogeology systems of entire countries were not available. In this respect the GROWA model, developed at the Agrosphere Institute of Research Centre Jülich, was one of the first groundwater recharge models that was applicable at the level of river basins and Federal States in Germany. The transfer and application of the GROWA model to groundwater systems of the Republic of Slovenia was a pioneering effort, establishing for the first time a groundwater recharge model covering the whole territory of Slovenia and not focusing on individual aquifers only, being the practice in Slovenia before. [...

Single nucleotide polymorphisms (SNPs) in coding regions of canine dopamine- and serotonin-related genes

<p>Abstract</p> <p>Background</p> <p>Polymorphism in genes of regulating enzymes, transporters and receptors of the neurotransmitters of the central nervous system have been associated with altered behaviour, and single nucleotide polymorphisms (SNPs) represent the most frequent type of genetic variation. The serotonin and dopamine signalling systems have a central influence on different behavioural phenotypes, both of invertebrates and vertebrates, and this study was undertaken in order to explore genetic variation that may be associated with variation in behaviour.</p> <p>Results</p> <p>Single nucleotide polymorphisms in canine genes related to behaviour were identified by individually sequencing eight dogs (<it>Canis familiaris</it>) of different breeds. Eighteen genes from the dopamine and the serotonin systems were screened, revealing 34 SNPs distributed in 14 of the 18 selected genes. A total of 24,895 bp coding sequence was sequenced yielding an average frequency of one SNP per 732 bp (1/732). A total of 11 non-synonymous SNPs (nsSNPs), which may be involved in alteration of protein function, were detected. Of these 11 nsSNPs, six resulted in a substitution of amino acid residue with concomitant change in structural parameters.</p> <p>Conclusion</p> <p>We have identified a number of coding SNPs in behaviour-related genes, several of which change the amino acids of the proteins. Some of the canine SNPs exist in codons that are evolutionary conserved between five compared species, and predictions indicate that they may have a functional effect on the protein. The reported coding SNP frequency of the studied genes falls within the range of SNP frequencies reported earlier in the dog and other mammalian species. Novel SNPs are presented and the results show a significant genetic variation in expressed sequences in this group of genes. The results can contribute to an improved understanding of the genetics of behaviour.</p

Observation of associated near-side and away-side long-range correlations in √sNN=5.02 TeV proton-lead collisions with the ATLAS detector

Two-particle correlations in relative azimuthal angle (Δϕ) and pseudorapidity (Δη) are measured in √sNN=5.02  TeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1  μb-1 of data as a function of transverse momentum (pT) and the transverse energy (ΣETPb) summed over 3.1<η<4.9 in the direction of the Pb beam. The correlation function, constructed from charged particles, exhibits a long-range (2<|Δη|<5) “near-side” (Δϕ∼0) correlation that grows rapidly with increasing ΣETPb. A long-range “away-side” (Δϕ∼π) correlation, obtained by subtracting the expected contributions from recoiling dijets and other sources estimated using events with small ΣETPb, is found to match the near-side correlation in magnitude, shape (in Δη and Δϕ) and ΣETPb dependence. The resultant Δϕ correlation is approximately symmetric about π/2, and is consistent with a dominant cos⁡2Δϕ modulation for all ΣETPb ranges and particle pT

Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results