1,188 results on '"S. Krüger"'
Search Results
2. Validation of a coupled atmospheric–aeroelastic model system for wind turbine power and load calculations
- Author
-
S. Krüger, G. Steinfeld, M. Kraft, and L. J. Lukassen
- Subjects
Renewable energy sources ,TJ807-830 - Abstract
The optimisation of the power output of wind turbines requires the consideration of various aspects including turbine design, wind farm layout and more. An improved understanding of the interaction of wind turbines with the atmospheric boundary layer is an essential prerequisite for such optimisations. With numerical simulations, a variety of different situations and turbine designs can be compared and evaluated. For such a detailed analysis, the output of an extensive number of turbine and flow parameters is of great importance. In this paper a coupling of the aeroelastic code FAST (fatigue, aerodynamics, structures, and turbulence) and the large-eddy simulation tool PALM (parallelised large-eddy simulation model) is presented. The advantage of the coupling of these models is that it enables the analysis of the turbine behaviour, among others turbine power, blade and tower loads, under different atmospheric conditions. The proposed coupling is tested with the generic National Renewable Energy Laboratory (NREL) 5 MW turbine and the operational eno114 3.5 MW turbine. Simulating the NREL 5 MW turbine allows for a first evaluation of our PALM–FAST coupling approach based on characteristics of the NREL turbine reported in the literature. The basic test of the coupling with the NREL 5 MW turbine shows that the power curve obtained is very close to the one when using FAST alone. Furthermore, a validation with free-field measurement data for the eno114 3.5 MW turbine for a site in northern Germany is performed. The results show a good agreement with the free-field measurement data. Additionally, our coupling offers an enormous reduction of the computing time in comparison to an actuator line model, in one of our cases by 89 %, and at the same time an extensive output of turbine data.
- Published
- 2022
- Full Text
- View/download PDF
3. Cyanobacteria net community production in the Baltic Sea as inferred from profiling pCO2 measurements
- Author
-
J. D. Müller, B. Schneider, U. Gräwe, P. Fietzek, M. B. Wallin, A. Rutgersson, N. Wasmund, S. Krüger, and G. Rehder
- Subjects
Ecology ,QH540-549.5 ,Life ,QH501-531 ,Geology ,QE1-996.5 - Abstract
Organic matter production by cyanobacteria blooms is a major environmental concern for the Baltic Sea, as it promotes the spread of anoxic zones. Partial pressure of carbon dioxide (pCO2) measurements carried out on Ships of Opportunity (SOOP) since 2003 have proven to be a powerful tool to resolve the carbon dynamics of the blooms in space and time. However, SOOP measurements lack the possibility to directly constrain depth-integrated net community production (NCP) in moles of carbon per surface area due to their restriction to the sea surface. This study tackles the knowledge gap through (1) providing an NCP best guess for an individual cyanobacteria bloom based on repeated profiling measurements of pCO2 and (2) establishing an algorithm to accurately reconstruct depth-integrated NCP from surface pCO2 observations in combination with modelled temperature profiles. Goal (1) was achieved by deploying state-of-the-art sensor technology from a small-scale sailing vessel. The low-cost and flexible platform enabled observations covering an entire bloom event that occurred in July–August 2018 in the Eastern Gotland Sea. For the biogeochemical interpretation, recorded pCO2 profiles were converted to CT*, which is the dissolved inorganic carbon concentration normalised to alkalinity. We found that the investigated bloom event was dominated by Nodularia and had many biogeochemical characteristics in common with blooms in previous years. In particular, it lasted for about 3 weeks, caused a CT* drawdown of 90 µmol kg−1, and was accompanied by a sea surface temperature increase of 10 ∘C. The novel finding of this study is the vertical extension of the CT* drawdown up to the compensation depth located at around 12 m. Integration of the CT* drawdown across this depth and correction for vertical fluxes leads to an NCP best guess of ∼1.2 mol m−2 over the productive period. Addressing goal (2), we combined modelled hydrographical profiles with surface pCO2 observations recorded by SOOP Finnmaid within the study area. Introducing the temperature penetration depth (TPD) as a new parameter to integrate SOOP observations across depth, we achieve an NCP reconstruction that agrees to the best guess within 10 %, which is considerably better than the reconstruction based on a classical mixed-layer depth constraint. Applying the TPD approach to almost 2 decades of surface pCO2 observations available for the Baltic Sea bears the potential to provide new insights into the control and long-term trends of cyanobacteria NCP. This understanding is key for an effective design and monitoring of conservation measures aiming at a Good Environmental Status of the Baltic Sea.
- Published
- 2021
- Full Text
- View/download PDF
4. High-resolution measurements of elemental mercury in surface water for an improved quantitative understanding of the Baltic Sea as a source of atmospheric mercury
- Author
-
J. Kuss, S. Krüger, J. Ruickoldt, and K.-P. Wlost
- Subjects
Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Marginal seas are directly subjected to anthropogenic and natural influences from land in addition to receiving inputs from the atmosphere and open ocean. Together these lead to pronounced gradients and strong dynamic changes. However, in the case of mercury emissions from these seas, estimates often fail to adequately account for the spatial and temporal variability of the elemental mercury concentration in surface water (Hg0wat). In this study, a method to measure Hg0wat at high resolution was devised and subsequently validated. The better-resolved Hg0wat dataset, consisting of about one measurement per nautical mile, yielded insight into the sea's small-scale variability and thus improved the quantification of the sea's Hg0 emission. This is important because global marine Hg0 emissions constitute a major source of atmospheric mercury. Research campaigns in the Baltic Sea were carried out between 2011 and 2015 during which Hg0 both in surface water and in ambient air were measured. For the former, two types of equilibrators were used. A membrane equilibrator enabled continuous equilibration and a bottle equilibrator assured that equilibrium was reached for validation. The measurements were combined with data obtained in the Baltic Sea in 2006 from a bottle equilibrator only. The Hg0 sea–air flux was newly calculated with the combined dataset based on current knowledge of the Hg0 Schmidt number, Henry's law constant, and a widely used gas exchange transfer velocity parameterization. By using a newly developed pump–CTD with increased pumping capability in the Hg0 equilibrator measurements, Hg0wat could also be characterized in deeper water layers. A process study carried out near the Swedish island Øland in August 2015 showed that the upwelling of Hg0-depleted water contributed to Hg0 emissions of the Baltic Sea. However, a delay of a few days after contact between the upwelled water and light was apparently necessary before the biotic and abiotic transformations of ionic to volatile Hg0 produced a distinct sea–air Hg0 concentration gradient. This study clearly showed spatial, seasonal, and interannual variability in the Hg0 sea–air flux of the Baltic Sea. The average annual Hg0 emission was 0.90 ± 0.18 Mg for the Baltic proper and extrapolated to 1.73 ± 0.32 Mg for the entire Baltic Sea, which is about half the amount entrained by atmospheric deposition. A comparison of our results with the Hg0 sea–air fluxes determined in the Mediterranean Sea and in marginal seas in East Asia were to some extent similar but they partly differed in terms of the deviations in the amount and seasonality of the flux.
- Published
- 2018
- Full Text
- View/download PDF
5. Life in Doggerland – palynological investigations of the environment of prehistoric hunter-gatherer societies in the North Sea Basin
- Author
-
S. Krüger, W. Dörfler, O. Bennike, and S. Wolters
- Subjects
Geology ,QE1-996.5 - Abstract
Die Analyse zweier Bohrkerne von Grund der Nordsee und dem in Analogie mit Doggerland bezeichneten ehemaligen Nordseefestland boten die Möglichkeit eines besseren Verständnisses pleistozäner und frühholozäner Vegetationsgeschichte. Basierend auf hochauflösenden Pollendiagrammen an Basalen Torfen wurden Vegetationsentwicklungen und Umweltbedingungen untersucht. Die Diagramme zeigen, dass sich die Mitteleuropäische Grundsukzession in weiten Teilen nachverfolgen lässt. Eine Bestimmung der Holzkohlekonzentrationen wurde vorgenommen, jedoch konnten keine sicheren Nachweise für menschliche Aktivität erbracht werden.
- Published
- 2017
- Full Text
- View/download PDF
6. Low Florida coral calcification rates in the Plio-Pleistocene
- Author
-
T. C. Brachert, M. Reuter, S. Krüger, J. S. Klaus, K. Helmle, and J. M. Lough
- Subjects
Ecology ,QH540-549.5 ,Life ,QH501-531 ,Geology ,QE1-996.5 - Abstract
In geological outcrops and drill cores from reef frameworks, the skeletons of scleractinian corals are usually leached and more or less completely transformed into sparry calcite because the highly porous skeletons formed of metastable aragonite (CaCO3) undergo rapid diagenetic alteration. Upon alteration, ghost structures of the distinct annual growth bands often allow for reconstructions of annual extension ( = growth) rates, but information on skeletal density needed for reconstructions of calcification rates is invariably lost. This report presents the bulk density, extension rates and calcification rates of fossil reef corals which underwent minor diagenetic alteration only. The corals derive from unlithified shallow water carbonates of the Florida platform (south-eastern USA), which formed during four interglacial sea level highstands dated approximately 3.2, 2.9, 1.8, and 1.2 Ma in the mid-Pliocene to early Pleistocene. With regard to the preservation, the coral skeletons display smooth growth surfaces with minor volumes of marine aragonite cement within intra-skeletal porosity. Within the skeletal structures, voids are commonly present along centres of calcification which lack secondary cements. Mean extension rates were 0.44 ± 0.19 cm yr−1 (range 0.16 to 0.86 cm yr−1), mean bulk density was 0.96 ± 0.36 g cm−3 (range 0.55 to 1.83 g cm−3) and calcification rates ranged from 0.18 to 0.82 g cm−2 yr−1 (mean 0.38 ± 0.16 g cm−2 yr−1), values which are 50 % of modern shallow-water reef corals. To understand the possible mechanisms behind these low calcification rates, we compared the fossil calcification rates with those of modern zooxanthellate corals (z corals) from the Western Atlantic (WA) and Indo-Pacific calibrated against sea surface temperature (SST). In the fossil data, we found a widely analogous relationship with SST in z corals from the WA, i.e. density increases and extension rate decreases with increasing SST, but over a significantly larger temperature window during the Plio-Pleistocene. With regard to the environment of coral growth, stable isotope proxy data from the fossil corals and the overall structure of the ancient shallow marine communities are consistent with a well-mixed, open marine environment similar to the present-day Florida Reef Tract, but variably affected by intermittent upwelling. Upwelling along the platform may explain low rates of reef coral calcification and inorganic cementation, but is too localised to account also for low extension rates of Pliocene z corals throughout the tropical WA region. Low aragonite saturation on a more global scale in response to rapid glacial–interglacial CO2 cyclicity is also a potential factor, but Plio-Pleistocene atmospheric pCO2 is generally believed to have been broadly similar to the present day. Heat stress related to globally high interglacial SST only episodically moderated by intermittent upwelling affecting the Florida platform seems to be another likely reason for low calcification rates. From these observations we suggest some present coral reef systems to be endangered from future ocean warming.
- Published
- 2016
- Full Text
- View/download PDF
7. A distal 140 kyr sediment record of Nile discharge and East African monsoon variability
- Author
-
W. Ehrmann, G. Schmiedl, M. Seidel, S. Krüger, and H. Schulz
- Subjects
Environmental pollution ,TD172-193.5 ,Environmental protection ,TD169-171.8 ,Environmental sciences ,GE1-350 - Abstract
Clay mineral assemblages in a sediment core from the distal Nile discharge plume off Israel have been used to reconstruct the late Quaternary Nile sediment discharge into the eastern Mediterranean Sea (EMS). The record spans the last ca. 140 kyr. Smectite abundances indicate the influence of the Blue Nile and the Atbara River that have their headwaters in the volcanic rocks of the Ethiopian Highlands. Kaolinite abundances indicate the influence of wadis, which contribute periodically to the suspension load of the Nile. Due to the geographical position, the climate and the sedimentary framework of the EMS is controlled by two climate systems. The long-term climate regime was governed by the African monsoon that caused major African humid periods (AHPs) with enhanced sediment discharge at 132 to 2 kyr), S4 (3.5 kyr), and S3 (5 kyr). During the last glacial period (Marine Isotope Stages (MISs) 4–2), the long-term changes in the monsoonal system were superimposed by millennial-scale changes in an intensified midlatitude glacial system. This climate regime caused short but pronounced drought periods in the Nile catchment, which are linked to Heinrich events and alternate with more humid interstadials. The clay mineral record further implies that feedback mechanisms between vegetation cover and sediment discharge of the Nile are detectable but of minor importance for the sedimentary record in the southeastern Mediterranean Sea during the investigated African humid periods.
- Published
- 2016
- Full Text
- View/download PDF
8. Upwellings mitigated Plio-Pleistocene heat stress for reef corals on the Florida platform (USA)
- Author
-
T. C. Brachert, M. Reuter, S. Krüger, J. Kirkerowicz, and J. S. Klaus
- Subjects
Ecology ,QH540-549.5 ,Life ,QH501-531 ,Geology ,QE1-996.5 - Abstract
The fast growing calcareous skeletons of zooxanthellate reef corals (z corals) represent unique environmental proxy archives through their oxygen and carbon stable isotope composition (δ18O, δ13C). In addition, the accretion of the skeleton itself is ultimately linked to the environment and responds with variable growth rates (extension rate) and density to environmental changes. Here we present classical proxy data (δ18O, δ13C) in combination with calcification records from 15 massive z corals. The z corals were sampled from four interglacial units of the Florida carbonate platform (USA) dated approximately 3.2, 2.9, 1.8 and 1.2 Ma (middle Pliocene to early Pleistocene). The z corals (Solenastrea, Orbicella, Porites) derive from unlithified shallow marine carbonates and were carefully screened for primary preservation suited for proxy analysis. We show that skeletal accretion responded with decreasing overall calcification rates (decreasing extension rate but increasing density) to warmer water temperatures. Under high annual water temperatures, inferred from sub-annually resolved δ18O data, skeletal bulk density was high, but extension rates and overall calcification rates were at a minimum (endmember scenario 1). Maximum skeletal density was reached during the summer season giving rise to a growth band of high density within the annually banded skeletons (“high density band”, HDB). With low mean annual water temperatures (endmember scenario 2), bulk skeletal density was low but extension rates and calcification rates reached a maximum, and under these conditions the HDB formed during winter. Although surface water temperatures in the Western Atlantic warm pool during the interglacials of the late Neogene were ∼ 2 °C higher than they are in the present day, intermittent upwelling of cool, nutrient-rich water mitigated water temperatures off south-western Florida and created temporary refuges for z coral growth. Based on the sub-annually resolved δ18O and δ13C records, the duration of the upwelling episodes causing the endmember 2 conditions was variable and lasted from a few years to a number of decades. The episodes of upwelling were interrupted by phases without upwelling (endmember 1) which lasted for at least a few years and led to high surface water temperatures. This variable environment is likely one of the reasons why the coral fauna is dominated by the eurytopic genus Solenastrea, also a genus resistant to high turbidity. Over a period of ∼ 50 years, the oldest sub annually resolved proxy record available (3.2 Ma) documents a persistent occurrence of the HDB during winter. In contrast, the HDB forms in summer in modern z corals from the Florida reef tract. We suggest this difference should be tested as being the expression of a tendency towards decreasing interglacial upwelling since the middle Pliocene. The number of z coral sclerochronological records for the Plio-Pleistocene is still rather low, however, and requires more data and an improved resolution, through records from additional time slices. Nonetheless, our calcification data from the warm periods of past interglacials may contribute to predicting the effects of future ocean warming on z coral health along the Florida reef tract. The inconsistent timing of the HDB within single coral records or among specimens and time slices is unexpected and contrasts the common practice of establishing chronologies on the basis of the density banding.
- Published
- 2016
- Full Text
- View/download PDF
9. Isotope fractionation between dissolved and suspended particulate Fe in the oxic and anoxic water column of the Baltic Sea
- Author
-
M. Staubwasser, R. Schoenberg, F. von Blanckenburg, S. Krüger, and C. Pohl
- Subjects
Ecology ,QH540-549.5 ,Life ,QH501-531 ,Geology ,QE1-996.5 - Abstract
Fe isotope ratios and concentrations of dissolved Fe (Fedis, < 0.45 μm) and of suspended particulate Fe (FeSPM) were analyzed from a depth profile through the anoxic Eastern Gotland Basin water column, Baltic Sea. Results show a sharp gradient in δ56Fedis across the ferruginous layer with δ56Fedis = −0.4‰ in the euxinic deep basin and δ56Fedis = +0.3‰ in the oxic upper water column. The isotopic gradient overlaps with a strong concentration gradient of Fedis, a concentration maximum in FeSPM and lower δ56FeSPM values than δ56Fedis. These features indicate preferential loss of light Fe isotopes from solution to suspended iron-oxyhydroxides (FeIOH) during typical oxidative precipitation across the redox interface. The sign of the overall fractionation, Δ56FeIOH-Fe(II)(aq) < 0‰, is in contrast to similar, mostly non-marine redox environments, where Δ56FeIOH-Fe(II)(aq) > 0‰. The difference appears to be the result of isotope exchange dominated by reaction kinetics in the marine water column, rather than equilibrium fractionation generally inferred for oxidative Fe precipitation elsewhere. High residual δ56Fedis immediately above the oxic–ferruginous interface and throughout the oxic water column suggests that any potential dissolved Fe export from marine reducing waters into the oxic open water column is enriched in the heavy isotopes. In the deep, mildly euxinic water column above the level of Fe sulfide saturation, a decreasing δ56FeSPM trend with depth and a generally low δ56Fedis are comparable to trends generally observed in marine anoxic sediment profiles where microbial reductive Fe dissolution occurs. The isotope composition of the redox-cycled Fe inventory in anoxic marine basins mainly reflects the balance between external fluxes, driving the composition towards crustal δ56Fe values, and intensity of internal recycling, driving δ56Fe towards negative values.
- Published
- 2013
- Full Text
- View/download PDF
10. Hierarchical Method for Prioritization of Sustainable Products’ Characteristics
- Author
-
O.J. Canciglieri, S. Krüger, and A.M.O. Sant’Anna
- Subjects
Chemical engineering ,TP155-156 ,Computer engineering. Computer hardware ,TK7885-7895 - Abstract
The conception of the manufacturing process to be initially applied in the parts rapid production targeting a first embodiment of an idea (prototypes) and without many demands on strength and accuracy is called rapid prototyping. New rapid prototyping technologies are more accessible under the aspects of cost, accuracy, usability, environmental and prototypes started to be increasingly explored in the sustainable product development process. This paper proposes the application of hierarchical analysis method to support the decision-making in Rapid Prototyping processes based on the analysis of product and RP technology and prototype characteristics. The application of the developed method consists of assigning numeric values to the product characteristics and to the important characteristics for users in order to build the comparison matrix to perform the assessment and the prioritization steps of the relevant features. Performing the prioritization of features considered most important along with the characteristics of the chosen prototyping technology make possible the analysis of the effect of the characteristics prioritization. The concepts of product development, rapid prototyping and analytic hierarchy process for the sustainable product were used in a structure (lightweight dual) to evaluate the proposed strategy. The lightweight dual product from the 3D printing technology has been successful to show the product’s purpose and functionality due to its lower cost, short execution time, good surface finishing and dimensional accuracy. The results show that the analysis of the sustainable product for rapid prototyping technology based on characteristics prioritization strategy improves the product design.
- Published
- 2016
- Full Text
- View/download PDF
11. Die waarheidsweg Dhammapada
- Author
-
S. Krüger, J.
- Subjects
monk ,monnik ,kosmologie ,buddhism ,meditasie ,christendom ,buddha ,cosmology ,boeddha ,boeddhistiese ,karma ,meditation ,dhammapada ,thema EDItEUR::Q Philosophy and Religion::QR Religion and beliefs::QRF Buddhism - Abstract
This book aims to contribute to the understanding of Early Buddhism, specifically the Dhammapada (one of the great classical religious scriptures of the world) in its historical setting, namely India in the third to fifth centuries BCE, comprising a unique linguistic, religious and socio-cultural setting. It further aims to contribute to the hermeneutics of bridging the historical gap of two and a half millennia between ancient India and contemporary society and to bridge the gaps between various cultures (African, Western, Indian) and religions, mainly theistic religions (specifically Christianity) and Buddhism in contemporary society. The central foci of this interest are the crucial issues of the existence of God and life after death. The book further investigates the possibility of a metaphysical mystical model, embarked on by myself over some decades. Lastly, it explores the field of a translation strategy from classical metaphysical and religious texts, in this case into Afrikaans, which is a relatively new medium in this field, with unique challenges. Regarding research methodology, the book utilised the historical critical method of explaining the content of the Dhammapada, taking into account its context. It further used the method (derived from phenomenology) of understanding the subjective intentionality structure of the original author(s), going back to the Buddha as well as the method of tendentional interpretation, extrapolating the intentionality structure to a metaphysical-mystical model of religious ‘peace’. It entails a first-hand study of the text in the original language, as well as of extensive secondary literature on the aspects noted above. The book contributes to scholarship by unfolding the history and language of this Buddhist text, revealing the structure of its conceptual edifice, the specific style of its communication of its message and the ultimate goal of this system. It makes a case for the relevance of this ancient system of thought across various divides. It also makes a case for the relevance of an inclusive metaphysical mystical theory of all human systems of ultimate meaning and confirms work done in this regard by the author while offering a translation of the text, regarded as excellent by peers. The target audience of the book is envisaged as three concentric circles. The centre target consists of scholars in one or more of the fields of Pāli and Buddhist studies, theology, comparative religious studies and philosophy. Secondly, the text is aimed at readers with a wide education and cultural interest but not necessarily trained in any of the fields mentioned above. Thirdly, and more peripherally, the book intends being of value to the general public where inter-religious understanding and dialogue is of great significance on a global scale and of particular relevance to South African society., Hierdie boek wil ’n bydrae lewer tot die begrip van die vroeë Boeddhisme, spesifiek van die Dhammapada (een van die groot klassieke religieuse geskrifte van die wêreld) in die historiese konteks daarvan, naamlik Indië in die derde tot vyfde eeue VAJ, met ’n unieke taalkundige, religieuse en sosio-kulturele Sitz im Leben. Dit is ook gerig op die hermeneutiek van brug bou oor die historiese gaping van twee en ’n half millennia tussen antieke Indië en die huidige samelewing en op brug bou oor die gapings tussen verskeie kulture (Afrika, die Weste, Indië) en religieë, veral die teïstiese religieë (met name die Christendom) en die Boeddhisme in die huidige samelewing. Die sentrale fokuspunte van hierdie belangstelling is die wesenlike probleem-areas van die bestaan van God en die lewe na die dood. Die boek het ook ten doel ’n verdere toetsing van die moontlikheid van ’n metafisies mistieke model waarmee die outeur al ’n paar dekades lank besig is en ’n verdere verkenning van ’n strategie van vertaling uit klassieke metafisiese en religieuse tekste, in hierdie geval in Afrikaans, wat ’n betreklik nuwe medium op hierdie terrein is, wat unieke uitdagings bied. Wat navorsingsmetodologie betref, het die boek gebruik gemaak van die histories kritiese metode van verklaring van die inhoud van die Dhammapada met verwysing na die konteks daarvan. Dit steun ook op die metode (aan die fenomenologie ontleen) van die verstaan van die subjektiewe intensionaliteitstruktuur van die oorspronklik outeur(s) daarvan, uiteindelik teruggaande op die Boeddha en die metode van tendensionele vertolking, waarvolgens die intensionele struktuur geëkstrapoleer word tot ’n metafisies mistieke model van religieuse ‘vrede’. Laastens behels die boek ’n eerstehandse bestudering van die teks in die oorspronklike taal, sowel as uitgebreide sekondêre literatuur oor die aspekte hierbo. Die boek ontvou die geskiedenis en taal van hierdie Boeddhistiese teks en bring die struktuur van die stel sentrale konseptuele begrippe, die kommunikasiestyl van die boodskap en die uiteindelike doel van die stelsel aan die lig. Dit toon die relevansie van hierdie antieke denkstelsel bo-oor verskeie skeidingsfaktore aan asook die relevansie van ’n insluitende metafisies mistieke teorie van alle stelsels van uiteindelike menslike betekenistoekenning en bevestig die werk wat in hierdie verband deur die skrywer gedoen is. Laastens lewer hierdie boek ’n akademiese bydrae deurdat dit ’n vertaling van die teks bied wat deur eweknieë as uitstekend bestempel word. Die teikenlesers word as drie konsentriese sirkels voorgestel. Eerstens is daar die binne groep wat bestaan uit kenners op een of meer van die terreine van Pāli en Boeddhistiese studies, teologie, vergelykende godsdienswetenskap en filosofie. Tweedens is die boek gerig op lesers met ’n gevorderde opleiding, maar nie noodwendig op die terreine hierbo genoem nie, en met ’n breë kulturele belangstelling en derdens is die boek bedoel as waardevol vir lesers uit die algemene publiek, waar interreligieuse begrip en dialoog van groot belang is op ’n wêreldskaal, asook van besondere relevansie vir die Suid-Afrikaanse samelewing. Die outeur verklaar dat die manuskrip die uitkoms van oorspronklike navorsing deur homself is, en dat geen deel geplagieer of elders gepubliseer is nie.
- Published
- 2017
- Full Text
- View/download PDF
12. Potential critical sources of error in the analysis of microcharcoal in Greenlandic palynological samples – an initial study
- Author
-
S. Krüger, B. Schnetger, A. Strunk, and C. Jessen
- Subjects
Arts and Humanities (miscellaneous) ,Earth and Planetary Sciences (miscellaneous) ,Paleontology - Published
- 2023
13. Real-World Efficacy of Nintedanib Plus Docetaxel After Progression on Immune Checkpoint Inhibitors: Results From the Ongoing, Non-interventional VARGADO Study
- Author
-
C. Grohé, W. Blau, W. Gleiber, S. Haas, S. Hammerschmidt, S. Krüger, H. Müller-Huesmann, M. Schulze, T. Wehler, J. Atz, and R. Kaiser
- Subjects
Indoles ,Lung Neoplasms ,Treatment Outcome ,Oncology ,Carcinoma, Non-Small-Cell Lung ,Antineoplastic Combined Chemotherapy Protocols ,Humans ,Radiology, Nuclear Medicine and imaging ,Docetaxel ,Prospective Studies ,Adenocarcinoma ,Neoplasm Recurrence, Local ,Immune Checkpoint Inhibitors - Abstract
To evaluate the efficacy and safety of nintedanib plus docetaxel in patients with advanced adenocarcinoma non-small cell lung cancer (NSCLC) who progressed after chemotherapy and immune checkpoint inhibitor (ICI) therapy.VARGADO (NCT02392455) is an ongoing, prospective, non-interventional, real-world study of nintedanib plus docetaxel after first-line chemotherapy in the routine clinical treatment of patients with locally advanced, metastatic or locally recurrent adenocarcinoma NSCLC. Data were collected during routine visits. We report the results from cohort B (n = 80), who received third-line nintedanib plus docetaxel after first-line chemotherapy and second-line ICI therapy.The median duration of follow-up was 12.4 months. Median progression-free survival from initiation of third-line nintedanib plus docetaxel was 6.4 months (95% confidence interval 4.8, 7.3); median overall survival was 12.1 months (95% confidence interval 9.4, 13.5). The 1-year overall survival rate after initiation of third-line nintedanib plus docetaxel treatment (primary end point) was 52% (95% confidence interval 38.0%, 64.4%). Among 64 patients with a documented response, the objective response rate was 50% (n = 32; one complete response and 31 partial responses) and the disease control rate was 86% (n = 55). There were no new safety signals or unexpected toxicities. Among all treated patients, 74% (n = 59) experienced drug-related adverse events, most commonly (nintedanib-related/docetaxel-related) diarrhoea (34%/24%), a decreased white blood cell count (11%/19%) and nausea (13%/16%).Nintedanib plus docetaxel demonstrated a high response rate and disease stabilisation in the third-line setting after failure of prior chemotherapy and ICI treatment, with a manageable safety profile. These results suggest that nintedanib plus docetaxel represents an efficient treatment option after failure of prior ICIs. The ongoing VARGADO study provides valuable real-world data to inform clinical decision-making regarding treatment sequencing after chemotherapy and ICI failure in patients with adenocarcinoma NSCLC.
- Published
- 2022
14. Verfassungsrecht, Ethik und Infektionsschutz
- Author
-
Dagmar Schulze Heuling and Heike S. Krüger
- Published
- 2023
15. The necessity of time-based calculations for dimensioning of hybrid power supply systems of ships within the early design stage
- Author
-
C. Emmersberger, B. Carstensen, S. Krüger, and A. Lübcke
- Published
- 2022
16. Veränderungen bei der hospitalisierten ambulant erworbenen Pneumonie in der COVID-Pandemie – Daten aus QS NRW
- Author
-
S Krüger, K J Franke, K Rasche, B Schaaf, D Wiesnewski, and S Macher-Heidrich
- Published
- 2022
17. Operating a Cryogenic Test RIG for a 10 Meter Long Liquid Nitrogen Cooled Superconducting Power Cable
- Author
-
Træholt, C., Rasmussen, C., Kühle, A., Olsen, S. Krüger, Høj Jensen, K., Tønnesen, O., Willén, D. W. A., Däumling, M., Rasmussen, C. N., and Shu, Quan-Sheng, editor
- Published
- 2000
- Full Text
- View/download PDF
18. Lymphangiomatose − seltene Ursache eines Pleuraergusses
- Author
-
M. Uhlenbruch, S. Keymel, and S. Krüger
- Subjects
Pulmonary and Respiratory Medicine ,03 medical and health sciences ,0302 clinical medicine ,030228 respiratory system ,030212 general & internal medicine - Abstract
ZusammenfassungEin 33-jähriger Mann stellte sich wegen langsam progredienter Luftnot vor. Bei der Untersuchung fielen ein Pleuraerguss rechts, Lymphödem linker Unterschenkel und Fuß und fleckige, landkartenartige Hautveränderungen auf. Bei der Pleurapunktion rechts konnte ein chylöser Erguss abgelassen werden. In der Ganzkörper-MRT war der Pleuraerguss rechts nachweisbar, eine Vermehrung der Lymphgefäße inguinal, parailiakal und paraaortal und prominente Chylusgefäße. Eine ossäre Beteiligung lag nicht vor. Der Ductus thoracicus abdominalis war bis auf 3 mm erweitert. Wir stellten die Diagnose einer generalisierten lymphatischen Anomalie (GLA) – Lymphangiomatose. Die GLA ist eine seltene Erkrankung unbekannter Ursache mit Fehlentwicklung des lymphatischen Systems. Thorakal fällt eine GLA oft durch die Entwicklung von chylösen Pleuraergüssen auf. Es können aber auch viele andere Organe betroffen sein. Die Therapie besteht meist in einer symptomatischen Behandlung und dem Versuch, den Progress der Erkrankung zu verlangsamen.
- Published
- 2020
19. Lungenkarzinom mit ausgeprägter mediastinaler Lymphadenopathie – wer denkt an ein NUT-Karzinom?
- Author
-
S. Krüger and S. Keymel
- Subjects
Pulmonary and Respiratory Medicine ,Gynecology ,03 medical and health sciences ,medicine.medical_specialty ,0302 clinical medicine ,030228 respiratory system ,business.industry ,medicine ,030212 general & internal medicine ,business - Abstract
ZusammenfassungEine 39-jährige Patientin hat sich initial wegen Rückenschmerzen orthopädisch vorgestellt. Nachdem sich in der Magnetresonanztomografie der Lendenwirbelsäule der Verdacht auf eine tumoröse Erkrankung gestellt hatte, war in den weiterführenden Untersuchungen eine pulmonale Raumforderung, eine ausgedehnte mediastinale Lymphadenopathie und ein großer einseitiger Pleuraerguss nachweisbar. Histologisch zeigte sich sowohl in den Proben des Tumors im Wirbelkörper als auch in den Proben der transbronchialen Nadelaspiration eines mediastinalen Lymphknotens ein NUT-Karzinom. Das NUT-Karzinom, das früher als NUT-Mittellinienkarzinom bezeichnet wurde, ist eine sehr seltene, aggressive Tumorentität mit ungünstiger Prognose. Der Tumor wurde zunächst gehäuft in der Mittellinie der oberen Atemwege und des Mediastinums beschrieben, ist aber nicht darauf beschränkt. Das NUT-Karzinom trifft häufig junge Patienten. Aufgrund der Seltenheit existiert bisher keine etablierte Therapie.
- Published
- 2020
20. VERSFELD’S DIALOGUE WITH EASTERN THOUGHT
- Author
-
J. S. Krüger
- Published
- 2021
21. Influence of the liver microenvironment on tumor cell growth and immune evasion in liver metastasis of pancreatic cancer
- Author
-
Leon Aldag, S. Beckinger, S. Heckl, S. Krüger, T. Daunke, C. Röcken, D. Wesch, and S. Sebens
- Subjects
Hepatology ,Endocrinology, Diabetes and Metabolism ,Gastroenterology - Published
- 2022
22. [Management of Adult Community-Acquired Pneumonia and Prevention - Update 2021 - Guideline of the German Respiratory Society (DGP), the Paul-Ehrlich-Society for Chemotherapy (PEG), the German Society for Infectious Diseases (DGI), the German Society of Medical Intensive Care and Emergency Medicine (DGIIN), the German Viological Society (DGV), the Competence Network CAPNETZ, the German College of General Practitioneers and Family Physicians (DEGAM), the German Society for Geriatric Medicine (DGG), the German Palliative Society (DGP), the Austrian Society of Pneumology Society (ÖGP), the Austrian Society for Infectious and Tropical Diseases (ÖGIT), the Swiss Respiratory Society (SGP) and the Swiss Society for Infectious Diseases Society (SSI)]
- Author
-
S, Ewig, M, Kolditz, M, Pletz, A, Altiner, W, Albrich, D, Drömann, H, Flick, S, Gatermann, S, Krüger, W, Nehls, M, Panning, J, Rademacher, G, Rohde, J, Rupp, B, Schaaf, H-J, Heppner, R, Krause, S, Ott, T, Welte, and M, Witzenrath
- Subjects
Adult ,Critical Care ,Austria ,Germany ,Emergency Medicine ,Pulmonary Medicine ,Humans ,Physicians, Family ,Pneumonia ,Communicable Diseases ,Aged - Abstract
The present guideline provides a new and updated concept of the management of adult patients with community-acquired pneumonia. It replaces the previous guideline dating from 2016.The guideline was worked out and agreed on following the standards of methodology of a S3-guideline. This includes a systematic literature search and grading, a structured discussion of recommendations supported by the literature as well as the declaration and assessment of potential conflicts of interests.The guideline has a focus on specific clinical circumstances, an update on severity assessment, and includes recommendations for an individualized selection of antimicrobial treatment.The recommendations aim at the same time at a structured assessment of risk for adverse outcome as well as an early determination of treatment goals in order to reduce mortality in patients with curative treatment goal and to provide palliation for patients with treatment restrictions.Die vorliegende Leitlinie umfasst ein aktualisiertes Konzept der Behandlung und Prävention von erwachsenen Patienten mit ambulant erworbener Pneumonie und löst die bisherige Leitlinie aus dem Jahre 2016 ab.Sie wurde entsprechend den Maßgaben zur Methodologie einer S3-Leitlinie erarbeitet und verabschiedet. Hierzu gehören eine systematische Literaturrecherche und -bewertung, die strukturierte Diskussion der aus der Literatur begründbaren Empfehlungen sowie eine Offenlegung und Bewertung möglicher Interessenskonflikte.Die Leitlinie zeichnet sich aus durch eine Zentrierung auf definierte klinische Situationen, eine aktualisierte Maßgabe der Schweregradbestimmung sowie Empfehlungen zu einer individualisierten Auswahl der initialen antimikrobiellen Therapie.Die Empfehlungen zielen gleichzeitig auf eine strukturierte Risikoevaluation als auch auf eine frühzeitige Bestimmung des Therapieziels, um einerseits bei kurativem Therapieziel die Letalität der Erkrankung zu reduzieren, andererseits bei palliativem Therapieziel eine palliative Therapie zu eröffnen.
- Published
- 2021
23. Spontanes Ovarielles Überstimulationssyndrom mit Partialmole bei Mehrlingsschwangerschaft
- Author
-
S Krüger-Rehberg, E Schleussner, and S Dargel
- Published
- 2021
24. Thermal analysis of repetitive single crystallization events in glass-forming liquids at low undercooling
- Author
-
S. Krüger and Joachim Deubener
- Subjects
010302 applied physics ,Exothermic reaction ,Materials science ,Physics::Optics ,Thermodynamics ,02 engineering and technology ,Liquidus ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Isothermal process ,Electronic, Optical and Magnetic Materials ,law.invention ,Crystal ,law ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,Crystallization ,0210 nano-technology ,Supercooling ,Thermal analysis ,Single crystal - Abstract
Thermal analyses of 284 repetitive single crystallization events were carried out. In particular, the isothermal liquid-to-crystal transformation kinetics of Poisson-distributed and non-Gaussian shaped exothermic DSC signals are calculated individually and by superimposition. It is found that modes of impingement for anisotropic growth, random and regular dispersions fail to accurately predict the growth exponent if a single crystal or a low number of crystals are growing. Non-stationary effects are evident at low and large crystal fractions which diminish when virtual signals of multiple crystallization events are superimposed. The results show that the precise analytic formulation to calculate the degree of transformation relies on an ensemble of crystals growing simultaneously. Where this is not the case, as in glass-forming liquids cooled from above liquidus temperature, the proper approach is to use a time-averaged signal of repetitive crystallization runs.
- Published
- 2018
25. Cooling history of a wet-granulated blast furnace slag (GBS)
- Author
-
A. Ehrenberg, S. Krüger, N. Pronina, Hansjörg Bornhöft, and Joachim Deubener
- Subjects
010302 applied physics ,Quenching ,Blast furnace ,Materials science ,Metallurgy ,02 engineering and technology ,Liquidus ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,Viscosity ,Cooling rate ,Ground granulated blast-furnace slag ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,Relaxation (physics) ,0210 nano-technology ,Glass transition - Abstract
Granulated blast furnace slag (GBS) is a glassy by-product of the steel industry that is formed during quenching of the molten slag after the blast furnace in a water-jet. To elucidate the cooling history of GBS, calorimetric scanning in the glass transition range and viscometric experiments at temperatures above the liquidus were performed. The GBS studied was of industrial origin with a d50 = 700 μm and > 99% glassy. It is found that GBS glass is of high potential energy, showing a fictive temperature that is approx. 160 K higher than the glass transition temperature under standard cooling conditions. Using different viscosity models and the relationship between quench rate and shear viscosity at the fictive temperature it is calculated that GBS was formed at a cooling rate of approx. 2.6 × 105 K s−1 corresponding to a shear viscosity of 105.9 Pa s. Due to the high Tf and high amount of heat that is released during structural relaxation, GBS is assigned to the class of hyperquenched glasses.
- Published
- 2018
26. [Lymphangiomatosis: Rare Cause of Pleural Effusion]
- Author
-
M, Uhlenbruch, S, Keymel, and S, Krüger
- Subjects
Adult ,Male ,Pleural Effusion ,Dyspnea ,Lymphangioma ,Humans ,Chylothorax ,Thoracic Duct - Abstract
A 33-year-old man presented to us with slowly progressive dyspnea. At the physical examination we found pleural effusion on the right side, lymph edema of the left lower limb and foot and blotchy map-like skin changes. The pleural puncture revealed a chylous effusion. In whole body MRI we saw the pleural effusion on the right, an increase in lymph vessels in the pelvis and paraaortic, and prominent chylous vessels. There was no bone involvement. The abdominal thoracic duct was enlarged by up to 3 mm. We diagnosed a general lymphatic anomaly (GLA) - lymphangiomatosis. GLA is a rare disease of unknown origin with dysplasia of the lymphatic system. The thoracic manifestation is often the development of chylous pleural effusions. However, many other organs can also be involved. Therapy includes in most cases symptomatic relief and the attempt to slow the progression of the disease.Ein 33-jähriger Mann stellte sich wegen langsam progredienter Luftnot vor. Bei der Untersuchung fielen ein Pleuraerguss rechts, Lymphödem linker Unterschenkel und Fuß und fleckige, landkartenartige Hautveränderungen auf. Bei der Pleurapunktion rechts konnte ein chylöser Erguss abgelassen werden. In der Ganzkörper-MRT war der Pleuraerguss rechts nachweisbar, eine Vermehrung der Lymphgefäße inguinal, parailiakal und paraaortal und prominente Chylusgefäße. Eine ossäre Beteiligung lag nicht vor. Der Ductus thoracicus abdominalis war bis auf 3 mm erweitert. Wir stellten die Diagnose einer generalisierten lymphatischen Anomalie (GLA) – Lymphangiomatose. Die GLA ist eine seltene Erkrankung unbekannter Ursache mit Fehlentwicklung des lymphatischen Systems. Thorakal fällt eine GLA oft durch die Entwicklung von chylösen Pleuraergüssen auf. Es können aber auch viele andere Organe betroffen sein. Die Therapie besteht meist in einer symptomatischen Behandlung und dem Versuch, den Progress der Erkrankung zu verlangsamen.
- Published
- 2020
27. Cytoplasmic expression of High mobility group A2 (HMGA2) determines survival prognoses in breast cancer patients
- Author
-
S Krüger, C Röcken, Christoph Borzikowsky, N. Maass, I. Alkatout, Antonia Wenners, Anna Trauzold, Wolfram Klapper, Thorsten Heilmann, M Bauer, M Elessawy, Florian Vondung, and C Schem
- Subjects
HMGA2 ,Breast cancer ,High-mobility group ,biology ,Expression (architecture) ,Cytoplasm ,business.industry ,biology.protein ,Cancer research ,Medicine ,business ,medicine.disease - Published
- 2020
28. Sichere IT ohne Schwachstellen und Hintertüren
- Author
-
Jean-Pierre Seifert, Christoph Krauß, Arnd Weber, Martin Schallbruch, Michael Kasper, D. Kuhlmann, Sylvain Guilley, Gernot Heiser, Steffen Reith, Philipp S. Krüger, and Anupam Chattopadhyay
- Subjects
Technology ,medicine.medical_specialty ,certification ,cybersecurity ,Technology (Applied sciences) ,supply chain risks ,security ,Regulierung ,lcsh:Technology ,open source ,sovereignty ,verification ,lcsh:Social Sciences ,Hardware ,information technology ,Technology Assessment ,Political science ,Informationstechnik ,medicine ,T1-995 ,Technikfolgenabschätzung ,Zertifizierung ,Technology (General) ,Gynecology ,H1-99 ,Technik, Technologie ,software ,lcsh:T ,regulation ,Sicherheit ,lcsh:H ,Social sciences (General) ,Open source ,ddc:600 - Abstract
Unsere zunehmende Abhängigkeit von Informationstechnik erhöht kontinuierlich die Safety- und Security-Anforderungen bei deren Einsatz. Ein zentrales Problem hierbei sind Schwachstellen von Hard- und Software. Marktkräfte konnten diese Situation bislang nicht grundsätzlich beheben. Eine Gegenstrategie sollte deshalb folgende Optionen erwägen: (1) private und staatliche Förderung offener und sicherer IT‑Produktion, (2) Verbesserung der souveränen Kontrolle bei der Produktion aller kritischen IT‑Komponenten innerhalb eines Wirtschaftsraumes sowie (3) verbesserte und durchgesetzte Regulierung. Dieser Beitrag analysiert Vor- und Nachteile dieser Optionen. Es wird vorgeschlagen, die Sicherheit der Schlüsselkomponenten einer Lieferkette durch weltweit verteilte, offene und ggf. mathematisch bewiesene Komponenten zu gewährleisten. Der beschriebene Ansatz erlaubt die Nutzung existierender und neuer proprietärer Komponenten. Increasing dependence on information technology calls for strengthening the requirements on their safety and security. Vulnerabilities that result from flaws in hardware and software are a core problem which market mechanisms have failed to eliminate. A strategy for resolving this issue should consider the following options: (1) private- and public-sector funding for open and secure production, (2) strengthening the sovereign control over the production of critical IT components within an economic zone, and (3) improving and enforcing regulation. This paper analyses the strengths and weaknesses of these options and proposes a globally distributed, secure supply chain based on open and mathematically proved components. The approach supports the integration of legacy and new proprietary components.
- Published
- 2020
29. Determinanten der QTc-Zeit bei Patienten mit einer stabilen oder exazerbierten chronisch obstruktiven Lungenerkrankung
- Author
-
S Keymel and S Krüger
- Published
- 2020
30. Bevacizumab (Avastin) in Combination with Platinum-Based Chemotherapy as First-Line Therapy for Advanced Non-Small Cell Lung Cancer in Different Age Groups in Germany
- Author
-
H Wirtz, S Lang, S Heinzmann, C Geßner, W Schütte, M Zortel, and S Krüger
- Subjects
Oncology ,Chemotherapy ,medicine.medical_specialty ,Bevacizumab ,business.industry ,medicine.medical_treatment ,medicine.disease ,First line therapy ,Age groups ,Internal medicine ,Medicine ,Non small cell ,business ,Lung cancer ,medicine.drug - Published
- 2020
31. [Lung Cancer with Prominent Mediastinal Lymphadenopathy - Who Thinks of NUT Carcinoma?]
- Author
-
S, Keymel and S, Krüger
- Subjects
Adult ,Oncogene Proteins ,Biopsy ,Carcinoma ,Biomarkers, Tumor ,Humans ,Lymphadenopathy ,Nuclear Proteins ,Female ,Neoplasm Proteins ,Pleural Effusion, Malignant - Abstract
A 39-year-old woman presented with back pain at an orthopaedic clinic. Magnet resonance tomography revealed a spinal tumour. Further imaging also showed a pulmonary tumour, massive mediastinal lymphadenopathy as well as unilateral pleural effusion. Histology from biopsies from the spinal tumour and from a mediastinal lymph node revealed NUT carcinoma. The NUT carcinoma that earlier has been named NUT midline carcinoma is a very rare, aggressive tumour with a poor prognosis. Initially, the NUT carcinoma was thought to develop from organs in the midline such as upper airways or mediastinal cavity. However, the NUT carcinoma is not limited to structures in the midline. NUT carcinoma often affects young patients. Due to its low incidence, a standardized therapy could not be established until now.Eine 39-jährige Patientin hat sich initial wegen Rückenschmerzen orthopädisch vorgestellt. Nachdem sich in der Magnetresonanztomografie der Lendenwirbelsäule der Verdacht auf eine tumoröse Erkrankung gestellt hatte, war in den weiterführenden Untersuchungen eine pulmonale Raumforderung, eine ausgedehnte mediastinale Lymphadenopathie und ein großer einseitiger Pleuraerguss nachweisbar. Histologisch zeigte sich sowohl in den Proben des Tumors im Wirbelkörper als auch in den Proben der transbronchialen Nadelaspiration eines mediastinalen Lymphknotens ein NUT-Karzinom. Das NUT-Karzinom, das früher als NUT-Mittellinienkarzinom bezeichnet wurde, ist eine sehr seltene, aggressive Tumorentität mit ungünstiger Prognose. Der Tumor wurde zunächst gehäuft in der Mittellinie der oberen Atemwege und des Mediastinums beschrieben, ist aber nicht darauf beschränkt. Das NUT-Karzinom trifft häufig junge Patienten. Aufgrund der Seltenheit existiert bisher keine etablierte Therapie.
- Published
- 2020
32. Watching Dehydration: Seismic Indication for Transient Fluid Pathways in the Oceanic Mantle of the Subducting Nazca Slab
- Author
-
Pablo Salazar, Wasja Bloch, Timm John, Oliver S. Krüger, Jörn Kummerow, and Serge A. Shapiro
- Subjects
Geophysics ,010504 meteorology & atmospheric sciences ,Geochemistry and Petrology ,Slab ,medicine ,Dehydration ,010502 geochemistry & geophysics ,Petrology ,medicine.disease ,01 natural sciences ,Mantle (geology) ,Geology ,0105 earth and related environmental sciences - Published
- 2018
33. 'Agile Abschreckung' gegen Bedrohungen aus dem Cyber Raum – Optionen für deutsche Politik
- Author
-
Philipp S. Krüger
- Subjects
Military policy ,International relations ,Foreign policy ,Political science ,Public administration - Abstract
Kurzfassung: Wie kann effektive Deutsche Cyberabschreckung aussehen? Dieser Artikel stellt die ersten Ergebnisse eines neuen Cyberabschreckungsmodells vor, genannt „Agile Cyberabschreckung“, das auf interdisziplinärer Forschung am ISPK basiert. Danach eröffnen Cyber-Operationen einen völlig neuen Weg in der Verteilung von Macht. Grundsätzlich dafür ist der spezielle virtuelle (technologische) Charakter der operativen Domäne „Cyber“. Die beschriebene Agile Cyberabschreckung adressiert die spezifischen Cyber-Verwundbarkeiten einer „Cyber-Mittel-Macht“ wie Deutschland und schlägt vier Abschreckungsoptionen vor.
- Published
- 2018
34. Chronisch obstruktive Lungenerkrankung und Diabetes
- Author
-
S. Krüger and S. Keymel
- Subjects
Gynecology ,03 medical and health sciences ,medicine.medical_specialty ,0302 clinical medicine ,030228 respiratory system ,business.industry ,Endocrinology, Diabetes and Metabolism ,medicine ,030212 general & internal medicine ,business - Abstract
Es besteht eine komplexe Beziehung zwischen der chronisch obstruktiven Lungenerkrankung (COPD) und Diabetes. In mehreren Studien wurde nachgewiesen, dass Diabetes die Progression und Prognose einer COPD verschlechtern kann. Dies kann Folge eines direkten Effekts einer Hyperglykamie auf die Lungenphysiologie, Inflammation oder Anfalligkeit fur bakterielle Infektionen sein. Auf der anderen Seite wurden ausgepragte Hinweise dafur gefunden, dass eine COPD das Risiko fur die Entwicklung eines Typ-2-Diabetes, als Folge inflammatorischer Prozesse oder als Nebenwirkung der Therapie mit hoher dosierten Kortikosteroiden, steigert. Obwohl es bedeutende Hinweise fur eine Verbindung zwischen COPD und Diabetes gibt, sind zusatzliche Studien erforderlich, um diese Interaktion und die daraus resultierenden Implikationen besser zu verstehen.
- Published
- 2018
35. Pre-Quaternary wood decay ‘caught in the act’ by fire – examples of plant-microbe-interactions preserved in charcoal from clastic sediments
- Author
-
Pia S. Krüger, Joseline Manfroi, Haytham El Atfy, Dieter Uhl, André Jasper, and Philipe Havlik
- Subjects
0106 biological sciences ,010506 paleontology ,Fossil Record ,Microorganism ,food and beverages ,Plant microbe ,social sciences ,010603 evolutionary biology ,01 natural sciences ,stomatognathic system ,Abundance (ecology) ,Clastic rock ,visual_art ,Botany ,visual_art.visual_art_medium ,Environmental science ,Fossil plant ,General Agricultural and Biological Sciences ,Charcoal ,Quaternary ,0105 earth and related environmental sciences - Abstract
The fossil record contains abundant evidence for the activity of microorganisms in the form of characteristic decay structures within fossil plant remains. Despite an abundance of charcoal ...
- Published
- 2017
36. Heating rate effects in time-dependent homogeneous nucleation in glasses
- Author
-
S. Krüger, Joachim Deubener, Maziar Montazerian, Edgar Dutra Zanotto, and Oscar Peitl
- Subjects
010302 applied physics ,Materials science ,Number density ,Nucleation ,Thermodynamics ,02 engineering and technology ,Function (mathematics) ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Electronic, Optical and Magnetic Materials ,Crystal ,Crystallography ,Homogeneous ,0103 physical sciences ,Materials Chemistry ,Ceramics and Composites ,Cluster size ,0210 nano-technology ,Constant (mathematics) ,Order of magnitude - Abstract
Nucleation kinetics of glass-ceramics is frequently determined using Tammann's double-stage heat-treatment. This method requires a complex deconvolution of the experimentally observed induction time (tind), i.e. the intercept of the linear part of the crystal number density curve with the nucleation time axis, into two components. In this paper, double-stage heat treatments were performed, with heating rates between the nucleation and development temperatures covering two orders of magnitude, in samples of a homogeneously nucleating glass-forming system, lithium disilicate. Our results show that tind increases with increasing heating rates with cubic root dependence. In accordance with the theory, tind was split into the intrinsic time required to establish a steady-state cluster size distribution, τ (time-lag) at the nucleation temperature and an incubation time (ti), which is a size, heating rate and development temperature (Td) dependent growth time. We demonstrate that the Collins-Kashchiev nucleation model performs poorly if ti is approximated by the time needed to experimentally detect the first crystal. In contrast, the Shneidman approach is consistent with theory. We found that at any given nucleation temperature, ti is a strong function of the heating rate, and is proportional to tind, whereas τ is a constant, as expected.
- Published
- 2017
37. Schlafbezogene Atmungsstörungen bei beatmungspflichtigen Patienten – Relevanz für das perioperative und das intensivmedizinische Management
- Author
-
S. Krüger, S. Steiner, and Stefanie Keymel
- Subjects
Pulmonary and Respiratory Medicine ,Gynecology ,03 medical and health sciences ,medicine.medical_specialty ,0302 clinical medicine ,Ventilator weaning ,030228 respiratory system ,business.industry ,Perioperative care ,medicine ,030204 cardiovascular system & hematology ,business - Abstract
ZusammenfassungSchlafbezogene Atmungsstörungen (SBAS) als häufige und relevante Komorbidität erfordern sowohl im perioperativen Management als auch in der intensivmedizinischen Behandlung kritisch kranker Patienten besondere Berücksichtigung. Patienten mit SBAS benötigen aufgrund eines erhöhten perioperativen Risikos für kardiale, pneumologische und neurologische Komplikationen eine maßgeschneiderte perioperative Überwachung und Therapie, wobei die aktuellen Empfehlungen primär Patienten mit einer obstruktiven Schlafapnoe betrachten. Die intensivmedizinische Behandlung von kritisch kranken Patienten mit SBAS erfordert ein aufmerksames Management während der Beatmung, in der Weaning- und in der Postextubationsphase, um das Risiko einer prolongierten Beatmung oder eines Weaningversagens zu reduzieren.
- Published
- 2017
38. Solution to element crossword challenge
- Author
-
S. Krüger and B. Hattendorf
- Subjects
Political science ,MEDLINE ,Library science ,Analytical Chemistry (journal) ,Element (criminal law) ,Citation ,Biochemistry ,Analytical Chemistry - Abstract
Zurich, Switzerland S. Kruger & B. Hattendorf You can also search for this author in PubMed Google Scholar You can also search for this author in PubMed Google Scholar Correspondence to B. Hattendorf. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. This article is the solution to the Analytical Challenge to be found at https://doi.org/10.1007/s00216-020-02459-1 Reprints and Permissions Kruger, S., Hattendorf, B. Solution to element crossword challenge. Anal Bioanal Chem 412, 6635–6636 (2020). https://doi.org/10.1007/s00216-020-02877-1 Download citation Published: 10 September 2020 Issue Date: October 2020 DOI: https://doi.org/10.1007/s00216-020-02877-1
- Published
- 2020
39. Granularzelltumor der Lunge – eine bronchoskopische Blickdiagnose?
- Author
-
S. Keymel, S. Büter, and S. Krüger
- Subjects
Pulmonary and Respiratory Medicine ,Gynecology ,03 medical and health sciences ,medicine.medical_specialty ,0302 clinical medicine ,030228 respiratory system ,business.industry ,030220 oncology & carcinogenesis ,Treatment outcome ,medicine ,Mycobacterium Infections ,business - Abstract
ZusammenfassungEin 38-jähriger Patient wurde aufgrund einer zunehmenden Verschlechterung des Allgemeinzustandes und einer Kachexie stationär aufgenommen. Bildmorphologisch ergab sich bei einschmelzenden Rundherden und einer kavernösen Formation der Verdacht auf eine Mykobakteriose, sodass die Indikation zu einer Bronchoskopie gestellt wurde. In der Bronchoskopie gelang tatsächlich der Nachweis einer nicht tuberkulösen Mykobakteriose. Als Zufallsbefund zeigte sich im Mittellappenbronchus eine weißliche polypöse Schleimhautveränderung. Histologisch war ein Granularzelltumor (GZT) nachweisbar. Der GZT ist ein seltener Tumor, der an verschiedenen anatomischen Lokalisationen auftreten kann. In der Lunge kann er klinisch durch eine bronchiale Obstruktion manifest werden, bildgebend als Rundherd oder Infiltrat bzw. Atelektase oder als Zufallsbefund in einer Bronchoskopie auffallen. Therapie der 1. Wahl ist die chirurgische Entfernung.
- Published
- 2018
40. Bacterial Dispersers along Preferential Flow Paths of a Clay Till Depth Profile
- Author
-
Arnaud Dechesne, Nora Badawi, U. S. Krüger, Ole Nybroe, Frederik Bak, and Jens Aamand
- Subjects
Liquid film ,DNA, Bacterial ,liquid film ,Ecological succession ,complex mixtures ,Applied Microbiology and Biotechnology ,Microbial Ecology ,soil ,Soil ,03 medical and health sciences ,preferential flow paths ,RNA, Ribosomal, 16S ,community motility ,Colonization ,Succession ,Ecosystem ,Soil Microbiology ,030304 developmental biology ,Soil bacteria ,0303 health sciences ,Bacteria ,Ecology ,030306 microbiology ,Preferential flow paths ,Preferential flow ,succession ,Habitat ,Clay ,Biological dispersal ,Environmental science ,Community motility ,Food Science ,Biotechnology - Abstract
The ability to disperse is considered essential for soil bacteria colonization and survival, yet very little is known about the dispersal ability of communities from different heterogeneous soil compartments. Important factors for dispersal are the thickness and connectivity of the liquid film between soil particles. The present results from a fractured clay till depth profile suggest that dispersal ability is common in various soil compartments and that most are dominated by a few dispersing taxa. Importantly, an increase in shared dispersers among the preferential flow paths of the clay till suggests that active dispersal plays a role in the successful colonization of these habitats., This study assessed the dispersal of five bacterial communities from contrasting compartments along a fractured clay till depth profile comprising plow layer soil, preferential flow paths (biopores and the tectonic fractures below), and matrix sediments, down to 350 cm below the surface. A recently developed expansion of the porous surface model (PSM) was used to capture bacterial communities dispersing under controlled hydration conditions on a soil-like surface. All five communities contained bacteria capable of active dispersal under relatively low hydration conditions (−3.1 kPa). Further testing of the plow layer community revealed active dispersal even at matric potentials of −6.3 to −8.4 kPa, previously thought to be too dry for dispersal on the PSM. Using 16S rRNA gene amplicon sequencing, the dispersing communities were found to be less diverse than their corresponding total communities. The dominant dispersers in most compartments belonged to the genus Pseudomonas and, in the plow layer soil, to Rahnella as well. An exception to this was the dispersing community in the matrix at 350 cm below the surface, which was dominated by Pantoea. Hydrologically connected compartments shared proportionally more dispersing than nondispersing amplicon sequence variants (ASVs), suggesting that active dispersal is important for colonizing these compartments. These results highlight the importance of including soil profile heterogeneity when assessing the role of active dispersal and contribute to discerning the importance of active dispersal in the soil environment. IMPORTANCE The ability to disperse is considered essential for soil bacteria colonization and survival, yet very little is known about the dispersal ability of communities from different heterogeneous soil compartments. Important factors for dispersal are the thickness and connectivity of the liquid film between soil particles. The present results from a fractured clay till depth profile suggest that dispersal ability is common in various soil compartments and that most are dominated by a few dispersing taxa. Importantly, an increase in shared dispersers among the preferential flow paths of the clay till suggests that active dispersal plays a role in the successful colonization of these habitats.
- Published
- 2019
41. Chatter Management at Cold Rolling Mills Today
- Author
-
S. Krüger, M. Richard, and M. Peretic
- Published
- 2019
42. Hydrogen cyanide in fire tests
- Author
-
S. Kraus, W. Keil, Gabriele Roider, S. Krüger, and S. Stoll
- Subjects
Smoke ,Fire test ,Smouldering ,Smoke Inhalation Injury ,010401 analytical chemistry ,Hydrogen cyanide ,01 natural sciences ,0104 chemical sciences ,Pathology and Forensic Medicine ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,chemistry ,Environmental chemistry ,Carbon dioxide ,Environmental science ,Organic chemistry ,030216 legal & forensic medicine ,Gas composition ,Carbon monoxide - Abstract
The gas composition of fire smoke depends on the material being burned. Plastics containing nitrogen, e. g. polyurethane, which are used in modern household furnishings release hydrogen cyanide (HCN) under the influence of heat. In order to evaluate the impact of HCN on the ability of victims to react and escape possibilities as well as on the cause of death, the concentration of HCN and other gaseous components of smoke were determined by burning materials containing polyurethane. Bench scale fire tests (smouldering fires) were performed using model sofa samples containing polyurethane. The concentrations of HCN, carbon monoxide (CO) and carbon dioxide (CO2) were measured using Fourier transformation infrared (FTIR) spectroscopy. Additionally, the oxygen (O2) consumption, transmission and optical smoke density were determined. The gaseous concentrations in smoke determined in the bench scale fire tests were compared with the results of an enclosed room fire test (developing fire to full fire). The average maximum concentrations measured were 42 ppm for HCN and 1100 ppm for CO. The measured values can be classified as toxic to humans but are not in the fatal range. In relation to the dominant CO concentration during smouldering fires, the HCN content in fire smoke can only be considered as having a low-grade influence on human poisoning; however, if material containing polyurethane is burned in a full fire the HCN concentration must be considered as at least a contributing factor to the death of fire victims.
- Published
- 2016
43. Lag time to crystal nucleation of supercooled lithium disilicate melts: A test of the classical nucleation theory
- Author
-
S. Krüger and Joachim Deubener
- Subjects
Phase transition ,Chemistry ,Nucleation ,Thermodynamics ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,Gibbs free energy ,law.invention ,symbols.namesake ,law ,Metastability ,Materials Chemistry ,Ceramics and Composites ,symbols ,Classical nucleation theory ,Crystallization ,Supercooling ,Melting-point depression - Abstract
A noticeable discrepancy between the observed lag times to crystal nucleation of continuous cooling experiments and the predictions of the classical nucleation theory (CNT) is evident. In particular, in these experiments nucleation at free surfaces and in contact with noble metal is delayed by many orders of magnitude with respect to CNT even if one neglects the heterogeneous character of the phase transition in the kinetic analysis. In this paper it is proposed that delayed nucleation is a consequence of a smaller Gibbs free energy of the evolving critical nucleus as compared to the growing macrocrystal. Considering lag times in scales of the reduced melting temperature T / T m from 0.5 to 0.92 a difference in the free energy of crystallization of 6.7 kJ mol − 1 and a melting point depression of 146 K is approximated. The results are in line with the description of heterogeneous systems as introduced by the generalized Gibbs approach but can be also a hint to metastable polymorphs at the nanoscale.
- Published
- 2015
44. Efficacy and safety of nintedanib + docetaxel in lung adenocarcinoma patients (pts) following treatment with immune checkpoint inhibitors (ICIs): Updated results of the ongoing non-interventional study (NIS) VARGADO (NCT02392455)
- Author
-
C. Grohe, W. Gleiber, S. Krüger, H. Mueller-Huesmann, M. Schulze, J. Atz, and R. Kaiser
- Subjects
Oncology ,Hematology - Published
- 2019
45. [Granular Cell Tumor of the Lung - a Visual Diagnosis on Bronchoscopy?]
- Author
-
S, Keymel, S, Büter, and S, Krüger
- Subjects
Adult ,Male ,Incidental Findings ,Lung Neoplasms ,Treatment Outcome ,Granular Cell Tumor ,Bronchoscopy ,Humans ,Mycobacterium Infections, Nontuberculous ,Nontuberculous Mycobacteria ,Lung - Abstract
A 38 years old patient presented with a progressive reduction of his general condition and weight loss. Chest imaging revealed consolidations and cavities suggesting a mycobacterial infection. For further diagnosis, a bronchoscopy was performed. In fact, a nontuberculous mycobacterial infection was found. As an incidental finding, we saw a white polypoid tumor in the middle lobe bronchus. The histology of this tumor revealed a granular cell tumor (GCT). The GCT is a rare tumor entity which occurs at different anatomical locations. In the lungs, the GCT may become symptomatic as it can cause bronchial obstruction. In chest imaging, it can manifest as infiltration, atelectasis or nodule. Likewise, GCT can be found as an incidental finding in bronchoscopy. First choice treatment is surgical resection of the tumor.Ein 38-jähriger Patient wurde aufgrund einer zunehmenden Verschlechterung des Allgemeinzustandes und einer Kachexie stationär aufgenommen. Bildmorphologisch ergab sich bei einschmelzenden Rundherden und einer kavernösen Formation der Verdacht auf eine Mykobakteriose, sodass die Indikation zu einer Bronchoskopie gestellt wurde. In der Bronchoskopie gelang tatsächlich der Nachweis einer nicht tuberkulösen Mykobakteriose. Als Zufallsbefund zeigte sich im Mittellappenbronchus eine weißliche polypöse Schleimhautveränderung. Histologisch war ein Granularzelltumor (GZT) nachweisbar. Der GZT ist ein seltener Tumor, der an verschiedenen anatomischen Lokalisationen auftreten kann. In der Lunge kann er klinisch durch eine bronchiale Obstruktion manifest werden, bildgebend als Rundherd oder Infiltrat bzw. Atelektase oder als Zufallsbefund in einer Bronchoskopie auffallen. Therapie der 1. Wahl ist die chirurgische Entfernung.
- Published
- 2018
46. Novel Method Reveals a Narrow Phylogenetic Distribution of Bacterial Dispersers in Environmental Communities Exposed to Low-Hydration Conditions
- Author
-
U. S. Krüger, Nora Badawi, Jens Aamand, Frederik Bak, Barth F. Smets, Arnaud Dechesne, and Ole Nybroe
- Subjects
0301 basic medicine ,Surface Properties ,030106 microbiology ,Ecological succession ,Biology ,Models, Biological ,Applied Microbiology and Biotechnology ,03 medical and health sciences ,Abundance (ecology) ,RNA, Ribosomal, 16S ,Methods ,Soil Microbiology ,Bacteriological Techniques ,Ecology ,Sequence Analysis, RNA ,Microbiota ,biology.organism_classification ,Pseudomonas putida ,Lakes ,RNA, Bacterial ,030104 developmental biology ,Water potential ,Microbial population biology ,Habitat ,Soil water ,Biological dispersal ,Food Science ,Biotechnology - Abstract
In this study, we developed a method that provides profiles of community-level surface dispersal from environmental samples under controlled hydration conditions and enables us to isolate and uncover the diversity of the fastest bacterial dispersers. The method expands on the porous surface model (PSM), previously used to monitor the dispersal of individual bacterial strains in liquid films at the surface of a porous ceramic disc. The novel procedure targets complex communities and captures the dispersed bacteria on a solid medium for growth and detection. The method was first validated by distinguishing motile Pseudomonas putida and Flavobacterium johnsoniae strains from their nonmotile mutants. Applying the method to soil and lake water bacterial communities showed that community-scale dispersal declined as conditions became drier. However, for both communities, dispersal was detected even under low-hydration conditions (matric potential, −3.1 kPa) previously proven too dry for P. putida strain KT2440 motility. We were then able to specifically recover and characterize the fastest dispersers from the inoculated communities. For both soil and lake samples, 16S rRNA gene amplicon sequencing revealed that the fastest dispersers were substantially less diverse than the total communities. The dispersing fraction of the soil microbial community was dominated by Pseudomonas species cells, which increased in abundance under low-hydration conditions, while the dispersing fraction of the lake community was dominated by Aeromonas species cells and, under wet conditions (−0.5 kPa), also by Exiguobacterium species cells. The results gained in this study bring us a step closer to assessing the dispersal ability within complex communities under environmentally relevant conditions. IMPORTANCE Dispersal is a key process of bacterial community assembly, and yet, very few attempts have been made to assess bacterial dispersal at the community level, as the focus has previously been on pure-culture studies. A crucial factor for dispersal in habitats where hydration conditions vary, such as soils, is the thickness of the liquid films surrounding solid surfaces, but little is known about how the ability to disperse in such films varies within bacterial communities. Therefore, we developed a method to profile community dispersal and identify fast dispersers on a rough surface resembling soil surfaces. Our results suggest that within the motile fraction of a bacterial community, only a minority of the bacterial types are able to disperse in the thinnest liquid films. During dry periods, these efficient dispersers can gain a significant fitness advantage through their ability to colonize new habitats ahead of the rest of the community.
- Published
- 2018
47. Rechtsmissbrauch im Sozialrecht
- Author
-
Heike S. Krüger
- Published
- 2018
48. Updated definition of glass-ceramics
- Author
-
I. Mitra, Edgar Dutra Zanotto, Jürn W. P. Schmelzer, Takayuki Komatsu, S. Nakane, Joachim Deubener, Thomas Höche, Ralf Müller, Tsuyoshi Honma, Adrian Duran, Maria J. Pascual, Shixiang Zhou, S. Krüger, Mathieu Allix, Mark J. Davis, Publica, Clausthal University of Technology (TU Clausthal), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO), Instituto de Cerámica y Vidrio (ICV), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Nagaoka University of Technology, Nippon Electric Glass, University of Rostock, Universidade Federal de São Carlos [São Carlos] (UFSCar), and Southern University of Science and Technology [Shenzhen] (SUSTech)
- Subjects
Laser patterning ,Materials science ,Nanotechnology ,02 engineering and technology ,01 natural sciences ,law.invention ,law ,Phase (matter) ,0103 physical sciences ,Nano ,Materials Chemistry ,Ceramic ,Crystallization ,ComputingMilieux_MISCELLANEOUS ,010302 applied physics ,[CHIM.MATE]Chemical Sciences/Material chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Microstructure ,Electronic, Optical and Magnetic Materials ,Processing methods ,visual_art ,Volume fraction ,Ceramics and Composites ,visual_art.visual_art_medium ,0210 nano-technology - Abstract
Glass-ceramics are noted for their unusual combination of properties and manifold commercialized products for consumer and specialized markets. Evolution of novel glass and ceramic processing routes, a plethora of new compositions, and unique exotic nano- and microstructures over the past 60 years led us to review the definition of glass-ceramics. Well-established and emerging processing methods, such as co-firing, additive manufacturing, and laser patterning are analyzed concerning the core requirements of processing glass-ceramics and the performance of the final products. In this communication, we propose a revised, updated definition of glass-ceramics, which reads “Glass-ceramics are inorganic, non-metallic materials prepared by controlled crystallization of glasses via different processing methods. They contain at least one type of functional crystalline phase and a residual glass. The volume fraction crystallized may vary from ppm to almost 100%”.
- Published
- 2018
49. [Bronchitis Plastica - Acute Dyspnea and Branching Airway Casts]
- Author
-
P, Wischmann, S, Keymel, M, Kelm, and S, Krüger
- Subjects
Heart Failure ,Dyspnea ,Bronchoscopy ,Image Processing, Computer-Assisted ,Sputum ,Humans ,Female ,Bronchitis ,Respiratory Insufficiency ,Tomography, X-Ray Computed ,Lung ,Aged - Abstract
A 65 year old female presented to the emergency department with dyspnea and progressive cough with very viscous elongated secretion plugs. She suffered from multiple cardiac comorbidities and chronic heart failure. The CT scan of the thorax demonstrated extensive pulmonary infiltrates, unspecific mediastinal lymphadenopathy and enlargement of pulmonary lymph vessels. Bronchoscopy was performed and showed extensive occlusive bronchial casts. We diagnosed a case of bronchitis plastica. Therapy with inhalative heparin led to clinical improvement.bronchitis plastica is a rare disease with formation of occlusive bronchial casts. They are often found in cardiac disease or lymphatic disease.Eine 65-jährige Patientin stellte sich mit Dyspnoe, zunehmendem Husten und Abhusten von sehr zähen, länglichen Sekretpropfen vor. Sie war multipel schwer kardial vorerkrankt und litt an einer chronischen Herzinsuffizienz. Im CT-Thorax zeigten sich ausgedehnte pulmonale Infiltrate beidseits, eine unspezifische mediastinale Lymphadenopathie und eine Erweiterung der pulmonalen Lymphgefäße. Bronchoskopisch fanden sich gallertige zähe Ausgusspräparate der Atemwege. Es wurde die Diagnose einer Bronchitis plastica gestellt. Unter einer Therapie mit inhalativem unfraktioniertem Heparin kam es zu einer Besserung. Fazit: Die Bronchitis plastica ist eine seltene Erkrankung, die durch die Bildung von Bronchialausgüssen charakterisiert ist. Man findet sie gehäuft bei kardialen Erkrankungen oder Lymphgefäßerkrankungen.
- Published
- 2017
50. Rechtsmissbrauch im Sozialrecht.
- Author
-
Heike S. Krüger and Heike S. Krüger
- Subjects
- Public welfare--Law and legislation--Germany, Social security--Law and legislation--Germany, Social legislation--Germany
- Abstract
Die als zweckwidrig verstandene Inanspruchnahme einer bestehenden Rechtposition und ihre Begrenzung sind seit jeher ein Thema der Rechtswissenschaft. Die Arbeit hat sich zum Ziel gesetzt, das Phänomen des Rechtsmissbrauchs im Sozialrecht näher zu untersuchen. Nicht selten wird von Verwaltung und Rechtsprechung eine sozialrechtliche Rechtsposition mit Hinweis auf ein vermeintlich rechtsmissbräuchliches Verhalten verweigert, weil das auf der Grundlage der einschlägigen Norm erzielte Ergebnis dem Rechtsanwender als korrekturbedürftig erscheint. Neben der Analyse der Verwendung der Rechtsfigur in Literatur und Rechtsprechung geht es der Untersuchung vor allem darum, die Besonderheiten des Sozialrechts, die eine schlichte Übernahme der zivil- oder steuerrechtlichen Diskussion als zweifelhaft erscheinen lassen, herauszuarbeiten. Es werden auch diejenigen sozialrechtlichen Regelungen in den Blick genommen, die den Rechtmissbrauch auf Tatbestandsebene explizit ansprechen.
- Published
- 2018
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.