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  • 1
  • 2
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    In:  (Doctoral thesis/PhD), Christian-Albrechts-Universität Kiel, Kiel, Germany, 191 pp . Berichte aus dem Institut für Meereskunde an der Christian-Albrechts-Universität Kiel, 227 . DOI 10.3289/ifm_ber_227 〈http://dx.doi.org/10.3289/ifm_ber_227〉.
    Publication Date: 2014-10-21
    Type: Thesis , NonPeerReviewed
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  • 3
    Publication Date: 2018-08-17
    Description: Optimum multiparameter (OMP) analysis is used to analyze mixing in the central water boundary of the tropical North Atlantic Ocean. Diapycnal mixing is found to be prevalent in the frontal region. OMP analysis shows that the mixing is unidirectional (South Atlantic Central Water is always mixed upward into North Atlantic Central Water) but cannot identify the process responsible for the observed diapycnal mixing. A histogram of stability ratios Rρ for all mixing lines shows Rρ values between unity and the value found in the parent water masses. It is suggested that this may indicate competition between isopycnal mixing and double diffusion. Double diffusive fluxes are likely to make a recognizable and significant contribution to diapycnal mixing between the Central Waters.
    Type: Article , PeerReviewed
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  • 4
    ISSN: 1573-1561
    Keywords: Spodoptera littoralis ; Lepidoptera ; Noctuidae ; Egyptian cotton ; leaf worm ; oviposition behavior ; oviposition deterrence ; larval frass
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Previous experiments demonstrated an oviposition-deterring effect of larval frass in the Egyptian cotton leaf worm,Spodoptera littoralis (Boisd.). In this study, females were shown to perceive the oviposition-deterring substance(s) with their antennae. During dark, airtight, and cold (−10 °C) storage, the deterrent was persistent for at least 395 days. On the other hand, larval frass retained its activity for only two days when applied to cotton leaves. The deterrent activity of frass was independent of larval density. Frass of larvae reared at high densities deterred oviposition as well as frass of larvae feeding separately or in small groups. For significant oviposition deterrence, the minimum amount of frass was in the range of 5–10 mg frass per cotton leaf. An acetone extract of larval frass was highly deterrent, in contrast to extracts prepared with water, ethanol, chloroform, or pentane.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2016-04-21
    Description: Um Jugendlichen mit 'individuellen Vermittlungshemmnissen' den Einstieg in Ausbildung und Beruf zu erleichtern, steht seit dem Ausbildungsjahr 2004/2005 das neue Instrument Einstiegsqualifizierung für Jugendliche (EQJ-Maßnahmen) zur Verfügung. Die Partner des Nationalen Ausbildungspaktes streben durch diese sechs- bis zwölfmonatigen betrieblichen Praktika einen 'Brückenschlag' in die reguläre betriebliche Ausbildung an.Im Auftrag der Hans-Böckler-Stiftung wurden die Erfahrungen des ersten Durchgangs für die Region Dortmund/'Westfälisches Ruhrgebiet' untersucht. Die Expertenbefragungen im Rahmen der Kurzstudie haben ergeben, dass von den knapp 300 Jugendlichen, die im Jahr 2004/2005 ein solches Praktikum absolvierten, etwa jede/r zweite anschließend in eine betriebliche Ausbildung übernommen wurde. Im Vergleich zu anderen ausbildungsvorbereitenden Maßnahmen und angesichts der anhaltend hohen Jugendarbeitslosigkeit im Raum Dortmund wird dies als großer Erfolg gewertet.In der Untersuchung wird allerdings auch auf diverse Konstruktionsmängel dieses neuen Instruments hingewiesen: So verfügen die teilnehmenden Jugendlichen über relativ hohe Schulabschlüsse, Schüler/innen ohne Schulabschluss haben bei den EQJ-Maßnahmen kaum eine Chance. Als äußerst schwierig erweist sich auch die Anerkennung der Qualifizierungsbausteine auf die Ausbildungsdauer, weil die Teilnahme am Berufsschulunterricht nicht geregelt ist. Einstiegsqualifizierungen erweisen sich insofern allenfalls als Einstieg in eine verlängerte Ausbildung. Ob das Instrument EQJ dazu beiträgt, neue Ausbildungsplätze zu schaffen oder ob damit Ausbildungsplätze durch Langzeitpraktika tendenziell ersetzt werden, muss sich erst im Langzeitvergleich herausstellen.
    Keywords: ddc:330
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: German
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  • 6
    Publication Date: 2016-04-21
    Description: Mit den 'Gesetzen zur Modernisierung der Dienstleistungen am Arbeitsmarkt' Hartz 1 und 2 wurde am 1. Januar 2003 ein völlig neues Instrument zur Förderung beruflicher Weiterbildung eingeführt. Sogenannte Bildungsgutscheine sollten die Wahlmöglichkeiten und Eigenverantwortung der Teilnehmerinnen und Teilnehmer erhöhen und für mehr Wettbewerb und Transparenz am Weiterbildungsmarkt sorgen. Die bisherigen Erfahrungen werden von Bildungsexperten, Arbeitsämtern, Politikern und Gewerkschaften jedoch als 'ernüchternd', 'enttäuschend' und 'katastrophal' bezeichnet. Die Autorinnen des Arbeitspapiers gehen der Frage nach, ob es sich bei den beobachteten Problemen lediglich um Übergansprobleme handelt oder um Strukturfehler. Erste Antworten liefert ihre Untersuchung des neuen Verfahrens in der Region Dortmund/östliches Ruhrgebiet.
    Keywords: ddc:330 ; Weiterbildung ; Gutscheinsystem ; Berufsbildungspolitik ; Arbeitsmarktpolitik ; Deutschland ; Dortmund (Region)
    Repository Name: EconStor: OA server of the German National Library of Economics - Leibniz Information Centre for Economics
    Language: German
    Type: doc-type:workingPaper
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  • 7
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    American Meteorological Society
    In:  Journal of Physical Oceanography, 25 (8). pp. 1771-1787.
    Publication Date: 2018-04-05
    Description: The Cape Verde Frontal Zone separates the North and the South Atlantic Central Waters in the eastern North Atlantic. It also represents the boundary between the ventilated subtropical gyre and the quasi-stagnant shadow zone in the southeast. The thermohaline front is nearly compensated with respect to density, and density parameters RP, suggest the existence of double-diffusive processes. Datasets from three cruises to the region, approximately one year apart each, are used to determine the effects of double-diffusive diapycnal versus isopycnal mixing. For this purpose results from the usual temperature-salinity analysis assuming isopycnal mixing are compared to results from a multiparameter analysis where nutrient and oxygen data are also used. Significant diapycnal fluxes are found in the frontal zone between 200 and 300 m, with water mass contents being changed by more than 20% through diapycnal mixing. The associated buoyancy fluxes have a similar magnitude as surface fluxes in the area and thus represent an important contribution to the vertical balances of heat and salt.
    Type: Article , PeerReviewed
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  • 8
    facet.materialart.
    Unknown
    In:  [Talk] In: Fortbildungstag der Deutschen Meteorologische Gesellschafft - Zweigverein München, 30.05, München .
    Publication Date: 2012-02-23
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 9
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    Elsevier
    In:  Deep Sea Research Part I: Oceanographic Research Papers, 56 . pp. 1656-1674.
    Publication Date: 2016-11-01
    Description: The variability of two modes of Labrador Sea Water (LSW) (upper and deep Labrador Sea Water) and their respective spreading in the interior North Atlantic Ocean are investigated by means of repeated ship surveys carried out along the zonal WOCE line A2/AR19 located at 43–48°N (1993–2007) and along the GOOS line at about 48–51°N (1997–2002). Hydrographic section data are complemented by temperature, salinity, and velocity time series recorded by two moorings. They have been deployed at the western flank of the Mid-Atlantic Ridge (MAR) in the Newfoundland Basin during 1996–2004. The analysis of hydrographic anomalies at various longitudes points to a gradual eastward propagation of LSW-related signals, which happens on time scales of 3–6 years from the formation region towards the MAR. Interactions of the North Atlantic Current (NAC) with the Deep Western Boundary Current (DWBC) close to Flemish Cap point to the NAC being the main distributor of the different types of LSW into the interior of the Newfoundland Basin. Comparisons between the ship data and the mooring records revealed that the mooring sites are located in a region affected by highly variable flow. The mooring time series demonstrate an elevated level of variability with eddy activity and variability associated with the NAC considerably influencing the LSW signals in this region. Hydrographic data taken from Argo profiles from the vicinity of the mooring sites turned out to mimic quite well the temporal evolution captured by the moorings. There is some indication of occasional southward flow in the LSW layer near the MAR. If this can be considered as a hint to an interior LSW-route, it is at least of minor importance in comparison to the DWBC. It acts as an important supplier for the interior North Atlantic, distributing older and recently formed LSW modes southward along the MAR.
    Type: Article , PeerReviewed
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  • 10
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    AGU
    In:  Journal of Geophysical Research: Oceans, 94 (C5). pp. 6159-6168.
    Publication Date: 2017-09-26
    Description: The Azores Current, south of the Azores Archipelago, is part of the subtropical North Atlantic gyre. Using an international hydrographic data set, we analyze mean and seasonal geostrophic transport fields in the upper 800 m of the ocean in order to determine the origin of the Azores Current in the western basin and seasonal changes in the related flow. Geostrophic currents are obtained by using the method applied by Stramma (1984) in the eastern basin. The Azores Current is found to originate in the area of the Southwest Newfoundland Rise (Figure 10). In winter an almost uniform current connects this region of origin with the Azores Current, while a branching into two current bands is observed in summer, with the southern band forming a marked cyclonic loop. Within the upper 800 m, all of the transport in the northern band and about 70% of the transport in the southern band recirculates in the eastern basin. Additionally, expendable bathythermograph data from the Azores Current region indicate an increase of eddy potential energy from winter to summer.
    Type: Article , PeerReviewed
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