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  • Springer  (2.011.083)
  • Blackwell Science Ltd  (61.712)
Publikationsart
Schlagwörter
Verlag/Herausgeber
Sprache
Erscheinungszeitraum
  • 1
    Unbekannt
    Strategic decision making : applying the analytic hierarchy process (2004)
    London ; New York : Springer
    Decision engineering  
    Details
    Schlagwort(e): Decision making, Mathematical models. ; Decision making, Methodology.
    Seiten: ix, 172 p.
    ISBN: 1-85233-864-4
    URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=108180
    Standort Signatur Einschränkungen Verfügbarkeit
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    E-Book (Nationallizenzen)
  • 2
    Unbekannt
    Trusted computing platforms : design and applications (2005)
    New York : Springer
    Details
    Schlagwort(e): Computer engineering. ; Computer security. ; Electronic data processing, Distributed processing.
    Seiten: xx, 239 p.
    ISBN: 0-387-23917-0
    URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=128476
    Standort Signatur Einschränkungen Verfügbarkeit
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    E-Book (Nationallizenzen)
  • 3
    Unbekannt
    Web services, E-Business, and the Semantic Web : second international workshop, WES 2003, Klagenfurt, Austria, June 16-17, 2003 ; WES 2003 (2004)
    Berlin ; New York : Springer
    Lecture notes in computer science  
    Details
    Schlagwort(e): Semantic Web, Congresses.
    Seiten: x, 145 p.
    ISBN: 3-540-25982-1
    URL: http://www.netLibrary.com/urlapi.asp?action=summary&v=1&bookid=130186
    Standort Signatur Einschränkungen Verfügbarkeit
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    E-Book (Nationallizenzen)
  • 4
    facet.materialart.
    Unbekannt
    Eduard Suess: the first honorary president of the Geologische Vereinigung, is 190 years old (2021)
    Springer
    Details
    Publikationsdatum: 2022-09-26
    Materialart: Article , NonPeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - nicht begutachtet
  • 5
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    Unbekannt
    The Potential of Current- and Wind-Driven Transport for Environmental Management of the Baltic Sea (2014)
    Springer
    Details
    Publikationsdatum: 2022-09-19
    Beschreibung: The ever increasing impact of the marine industry and transport on vulnerable sea areas puts the marine environment under exceptional pressure and calls for inspired methods for mitigating the impact of the related risks. We describe a method for preventive reduction of remote environmental risks caused by the shipping and maritime industry that are transported by surface currents and wind impact to the coasts. This method is based on characterizing systematically the damaging potential of the offshore areas in terms of potential transport to vulnerable regions of an oil spill or other pollution that has occurred in a particular area. The resulting maps of probabilities of pollution to be transported to the nearshore and the time it takes for the pollution to reach the nearshore are used to design environmentally optimized fairways for the Gulf of Finland, Baltic Proper, and south-western Baltic Sea
    Materialart: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 6
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    Unbekannt
    Robust Human-Identifiable Markers for Absolute Relocalization of Underwater Robots in Marine Data Science Applications (2022)
    Springer
    Details
    Publikationsdatum: 2022-07-03
    Beschreibung: Since global navigation satellite systems (GNSS) for determining the absolute geolocation do not reach into the ocean, underwater robots typically obtain a GNSS position at the water surface and then use a combination of different sensors for estimating their pose while diving, including inertial navigation, acoustic doppler velocity logs, ultra short baseline localization systems and pressure sensors. When re-navigating to the same seafloor location after several days, months or years, e.g. for coastal monitoring, the absolute uncertainty of such systems can be in the range of meters for shallow water, and tens of meters for deeper waters in practice. To enable absolute relocalization in marine data science applications that require absolute seafloor positions in the range of centimeter precision, in this contribution we suggest to equip the monitoring area with visual markers that can be detected reliably even in case they are partially overgrown or partially buried by sediment, which can happen quickly in coastal waters. Inspired by patterns successful in camera calibration, we create robust markers that exhibit features at different scales, in order to allow detection, identification and pose estimation from different cameras and various altitudes as visibility (and therefore the maximum possible survey altitude) in coastal waters can vary significantly across seasons, tides and weather. The low frequency content of the marker resembles a human-readable digit, in order to allow easy identification by scientists. We present early results including promising initial tests in coastal waters.
    Materialart: Book chapter , NonPeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Buchkapitel
  • 7
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    Unbekannt
    Offshore Freshened Groundwater in Continental Shelf Environments (2022)
    Springer
    Details
    Publikationsdatum: 2022-06-02
    Beschreibung: While offshore groundwater has been utilized by coastal communities as far back as 1000 BC, only in the past 10 years has the global volume of fresh-to-brackish water hosted in offshore aquifers been truly appreciated. There are vast quantities (~300–500 × 103 km3) of offshore freshened groundwater sequestered in continental shelf sediments under water depths of less than 60 m within 110 km of the coastline. New marine geophysical methods now make it possible to map and quantify low salinity offshore groundwater bodies. To date, these offshore resources have not been developed. Offshore freshened groundwater could be produced if wells are located close to the shoreline and coastal desalination plants.
    Materialart: Book chapter , NonPeerReviewed
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Buchkapitel
  • 8
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    Unbekannt
    Multi-angle backscatter classification and sub-bottom profiling for improved seafloor characterization (2017)
    Springer
    In:  Marine Geophysical Research, 39 (1-2). pp. 289-306.
    Details
    Publikationsdatum: 2020-02-06
    Beschreibung: This study applies three classification methods exploiting the angular dependence of acoustic seafloor backscatter along with high resolution sub-bottom profiling for seafloor sediment characterization in the Eckernförde Bay, Baltic Sea Germany. This area is well suited for acoustic backscatter studies due to its shallowness, its smooth bathymetry and the presence of a wide range of sediment types. Backscatter data were acquired using a Seabeam1180 (180 kHz) multibeam echosounder and sub-bottom profiler data were recorded using a SES-2000 parametric sonar transmitting 6 and 12 kHz. The high density of seafloor soundings allowed extracting backscatter layers for five beam angles over a large part of the surveyed area. A Bayesian probability method was employed for sediment classification based on the backscatter variability at a single incidence angle, whereas Maximum Likelihood Classification (MLC) and Principal Components Analysis (PCA) were applied to the multi-angle layers. The Bayesian approach was used for identifying the optimum number of acoustic classes because cluster validation is carried out prior to class assignment and class outputs are ordinal categorical values. The method is based on the principle that backscatter values from a single incidence angle express a normal distribution for a particular sediment type. The resulting Bayesian classes were well correlated to median grain sizes and the percentage of coarse material. The MLC method uses angular response information from five layers of training areas extracted from the Bayesian classification map. The subsequent PCA analysis is based on the transformation of these five layers into two principal components that comprise most of the data variability. These principal components were clustered in five classes after running an external cluster validation test. In general both methods MLC and PCA, separated the various sediment types effectively, showing good agreement (kappa 〉0.7) with the Bayesian approach which also correlates well with ground truth data (r2 〉 0.7). In addition, sub-bottom data were used in conjunction with the Bayesian classification results to characterize acoustic classes with respect to their geological and stratigraphic interpretation. The joined interpretation of seafloor and sub-seafloor data sets proved to be an efficient approach for a better understanding of seafloor backscatter patchiness and to discriminate acoustically similar classes in different geological/bathymetric settings.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s11001-017-9325-4
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
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    Unbekannt
    High thermal tolerance of two Mediterranean cold-water coral species maintained in aquaria (2013)
    Springer
    In:  Coral Reefs, 32 (3). pp. 749-754.
    Details
    Publikationsdatum: 2017-06-20
    Beschreibung: In the Mediterranean deep-sea, scleractinian cold-water corals (CWC) are observed to survive at the uppermost end of their presumed thermal distribution range (4–13 °C). Here, we show that 2 common CWC species (i.e. Dendrophyllia cornigera and Desmophyllum dianthus) maintained in aquaria can indeed tolerate considerably elevated seawater temperatures (17.5 ± 0.1 °C), while growing at similar (D. dianthus) or significantly higher (D. cornigera) rates than conspecifics cultured in parallel for 87 days at ambient Mediterranean deep-sea temperature (12.5 ± 0.1 °C). Neither differences in coral appearance nor mortality were evident for both species at either temperature. D. dianthus grew significantly faster (0.23 ± 0.08 % day−1) than D. cornigera (0.05 ± 0.01 % day−1) under ambient thermal conditions. Growth of D. cornigera increased significantly (0.14 ± 0.07 % day−1) at elevated temperature, while Desmophyllum dianthus growth showed no significant difference under both conditions. These findings suggest that D. dianthus and D. cornigera may be capable of surviving in warmer environments than previously reported, and thus challenge temperature as the paramount limiting environmental factor for the occurrence of some CWC species.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00338-013-1011-7
    Standort Signatur Einschränkungen Verfügbarkeit
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    OceanRep: Artikel in einer Fachzeitschrift - begutachtet
  • 10
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    Unbekannt
    Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods (2017)
    Springer
    In:  Aquaculture International, 25 (4). pp. 1653-1666.
    Details
    Publikationsdatum: 2020-02-06
    Beschreibung: The present study examines the influence that environmental variables exerted on changes in condition index (CI), shell height (SH—dorsal-ventral axis) and soft tissue mass increments (STM) of the winged oyster Pteria colymbus in suspended culture during periods of upwelling (December to April) and non-upwelling (August to November) in the Cariaco Gulf, northeastern Venezuela. Environmental variables recorded between April 2012 and May 2013 included seston, water transparency, temperature, dissolved oxygen, chlorophyll a (Chl a) and the upwelling index (UI). Individuals were cultivated in lantern nets with an overall density of 56 individuals/0.123 m2. From three randomly chosen baskets, five individuals were sampled each month and changes in CI, STM and SH were related to the environmental variables using Spearman correlation and PCA. Results show that during upwelling, both Chl a and UI presented a positive and significant relationship with the oyster condition and growth parameters. During non-upwelling (low UI), this relationship was inverse, demonstrating the important influence of upwelling and non-upwelling periods on the ecophysiology of the species. Furthermore, it was shown that the non-upwelling, characterized by high temperatures and low food availability, is a critical period for P. colymbus, judging by a decrease in growth and survival rate. Nonetheless, this species reached 50 mm in 5 months, a size considered as commercially viable, suggesting that the study area is favourable to the cultivation of the winged oyster despite a dramatic decrease in upwelling intensity in the last decade.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s10499-017-0141-2
    Standort Signatur Einschränkungen Verfügbarkeit
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