ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Unbekannt

21st-century rise in anthropogenic nitrogen deposition on a remote coral reef (2017)

Ren, H., Chen, Y.-C., Wang, X. T., Wong, G. T. F., Cohen, A. L., De; Carlo, T. M., Weigand, M. A., Mii, H.-S., Sigman, D. M.

American Association for the Advancement of Science (AAAS)

In: Science

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2017-05-19

Beschreibung: With the rapid rise in pollution-associated nitrogen inputs to the western Pacific, it has been suggested that even the open ocean has been affected. In a coral core from Dongsha Atoll, a remote coral reef ecosystem, we observe a decline in the 15 N/ 14 N of coral skeleton–bound organic matter, which signals increased deposition of anthropogenic atmospheric N on the open ocean and its incorporation into plankton and, in turn, the atoll corals. The first clear change occurred just before 2000 CE, decades later than predicted by other work. The amplitude of change suggests that, by 2010, anthropogenic atmospheric N deposition represented 20 ± 5% of the annual N input to the surface ocean in this region, which appears to be at the lower end of other estimates.

Schlagwort(e): Geochemistry, Geophysics

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

2

Unbekannt

Optimal localization of diffusion sources in complex networks (2017)

Hu, Z.-L., Han, X., Lai, Y.-C., Wang, W.-X.

Royal Society

In: Royal Society Open Science

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2017-04-13

Beschreibung: Locating sources of diffusion and spreading from minimum data is a significant problem in network science with great applied values to the society. However, a general theoretical framework dealing with optimal source localization is lacking. Combining the controllability theory for complex networks and compressive sensing, we develop a framework with high efficiency and robustness for optimal source localization in arbitrary weighted networks with arbitrary distribution of sources. We offer a minimum output analysis to quantify the source locatability through a minimal number of messenger nodes that produce sufficient measurement for fully locating the sources. When the minimum messenger nodes are discerned, the problem of optimal source localization becomes one of sparse signal reconstruction, which can be solved using compressive sensing. Application of our framework to model and empirical networks demonstrates that sources in homogeneous and denser networks are more readily to be located. A surprising finding is that, for a connected undirected network with random link weights and weak noise, a single messenger node is sufficient for locating any number of sources. The framework deepens our understanding of the network source localization problem and offers efficient tools with broad applications.

Schlagwort(e): complexity, graph theory

Digitale ISSN: 2054-5703

Thema: Allgemeine Naturwissenschaft

Publiziert von Royal Society

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

3

Unbekannt

{alpha}-Synuclein directs microglial migration [Neuroscience] (2015)

Wang, S., Chu, C.-H., Stewart, T., Ginghina, C., Wang, Y., Nie, H., Guo, M., Wilson, B., Hong, J.-S., Zhang, J.

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2015-04-15

Beschreibung: Malformed α-Synuclein (α-syn) aggregates in neurons are released into the extracellular space, activating microglia to induce chronic neuroinflammation that further enhances neuronal damage in α-synucleinopathies, such as Parkinson’s disease. The mechanisms by which α-syn aggregates activate and recruit microglia remain unclear, however. Here we show that α-syn aggregates act as...

Print ISSN: 0027-8424

Digitale ISSN: 1091-6490

Thema: Biologie , Medizin , Allgemeine Naturwissenschaft

Publiziert von National Academy of Sciences

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

4

Unbekannt

Forty years of reform and opening up: Chinas progress toward a sustainable path (2019)

Lu, Y., Zhang, Y., Cao, X., Wang, C., Wang, Y., Zhang, M., Ferrier, R. C., Jenkins, A., Yuan, J., Bailey, M. J., Chen, D., Tian, H., Li, H., von Weizsäcker, E. U., Zhang, Z.

American Association for the Advancement of Science (AAAS)

In: Science Advances

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2019

Beschreibung: 〈p〉After 40 years of reform and "opening up," China has made remarkable economic progress. Such economic prosperity, however, has been coupled with environmental degradation. We analyze diverse long-term data to determine whether China is experiencing a decoupling of economic growth and environmental impacts, and where China stands with respect to the Sustainable Development Goals (SDGs) in terms of reducing regional division, urban-rural gap, social inequality, and land-based impacts on oceans. The results highlight that China’s desire to achieve "ecological civilization" has resulted in a decoupling trend for major pollutants since 2015, while strong coupling remains with CO〈sub〉2〈/sub〉 emissions. Progress has been made in health care provision, poverty reduction, and gender equity in education, while income disparity continues between regions and with rural-urban populations. There is a considerable way to go toward achieving delivery of the SDGs; however, China’s progress toward economic prosperity and concomitant sustainability provides important insights for other countries.〈/p〉

Digitale ISSN: 2375-2548

Thema: Allgemeine Naturwissenschaft

Publiziert von American Association for the Advancement of Science (AAAS)

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

5

Unbekannt

Flexible, solid-state electrolyte [Engineering] (2016)

Fu, K., Gong, Y., Dai, J., Gong, A., Han, X., Yao, Y., Wang, C., Wang, Y., Chen, Y., Yan, C., Li, Y., Wachsman, E. D., Hu, L.

National Academy of Sciences

In: PNAS - Proceedings of the National Academy of Sciences

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2016-06-30

Beschreibung: Beyond state-of-the-art lithium-ion battery (LIB) technology with metallic lithium anodes to replace conventional ion intercalation anode materials is highly desirable because of lithium’s highest specific capacity (3,860 mA/g) and lowest negative electrochemical potential (∼3.040 V vs. the standard hydrogen electrode). In this work, we report for the first time, to...

Print ISSN: 0027-8424

Digitale ISSN: 1091-6490

Thema: Biologie , Medizin , Allgemeine Naturwissenschaft

Publiziert von National Academy of Sciences

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

6

Unbekannt

CCCCC pentadentate chelates with planar Möbius aromaticity and unique properties (2016)

Zhu, C., Yang, C., Wang, Y., Lin, G., Yang, Y., Wang, X., Zhu, J., Chen, X., Lu, X., Liu, G., Xia, H.

American Association for the Advancement of Science (AAAS)

In: Science Advances

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2016-08-28

Beschreibung: The coordinating atoms in polydentate chelates are primarily heteroatoms. We present the first examples of pentadentate chelates with all binding atoms of the chelating agent being carbon atoms, denoted as CCCCC chelates. Having up to five metal-carbon bonds in the equatorial plane has not been previously observed in transition metal chemistry. Density functional theory calculations showed that the planar metallacycle has extended Craig-Möbius aromaticity arising from 12-center–12-electron d -p -conjugation. These planar chelates have broad absorption in the ultraviolet-visible–near-infrared region and, thus, notable photothermal performance upon irradiation by an 808-nm laser, indicating that these chelates have potential applications in photothermal therapy. The combination of facile synthesis, high stability, and broad absorption of these complexes could make the polydentate carbon chain a novel building block in coordination chemistry.

Digitale ISSN: 2375-2548

Thema: Allgemeine Naturwissenschaft

Publiziert von American Association for the Advancement of Science (AAAS)

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

7

Unbekannt

Shelf-edge trajectories and stratal stacking patterns: Their sequence-stratigraphic significance and relation to styles of deep-water sedimentation and amount of deep-water sandstone (2015)

Gong, C., Wang, Y., Pyles, D. R., Steel, R. J., Xu, S., Xu, Q., Li, D.

American Association of Petroleum Geologists (AAPG)

In: AAPG Bulletin

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2015-07-07

Beschreibung: Using a seismic database from the Qiongdongnan Basin in the South China Sea, this study demonstrates that shelf-edge trajectories and stratal stacking patterns are reliable, but understated, predictors of deep-water sedimentation styles and volumes of deep-water sand deposits, assisting greatly in locating sand-rich environments and in developing a more predictive and dynamic stratigraphy. Three main types of shelf-edge trajectories and their associated stratal stacking patterns were recognized: (1) flat to slightly falling trajectories with negative trajectory angles ( $${T}_{\mathrm{se}}$$ ) (–2° to 0°) and negative shelf-edge aggradation to progradation ratios ( $$\mathrm{d}y/\mathrm{d}x$$ ) (–0.04 to 0) and associated progradational and downstepping stacking patterns with low clinoform relief ( $${R}_{\mathrm{c}}$$ ) (150–550 m [492–1804 ft]) and negative differential sedimentation on the shelf and basin ( $${A}_{\mathrm{s}}/{A}_{\mathrm{b}}$$ ) (–0.6 to 0); (2) slightly rising trajectories with moderate $${T}_{\mathrm{se}}$$ (0°–2°) and medium $$\mathrm{d}y/\mathrm{d}x$$ (0–0.04), and associated progradational and aggradational stacking patterns with intermediate $${R}_{\mathrm{c}}$$ (250–400 m [820–1312 ft]) and intermediate $${A}_{\mathrm{s}}/{A}_{\mathrm{b}}$$ (0–0.6); and (3) steeply rising trajectories with high $${T}_{\mathrm{se}}$$ (2°–6°) and high $$\mathrm{d}y/\mathrm{d}x$$ (0.04–0.10) and associated dominantly aggradational stacking patterns with high $${R}_{\mathrm{c}}$$ (350–650 m [1148–2132 ft]) and high $${A}_{\mathrm{s}}/{A}_{\mathrm{b}}$$ (1–2). Each trajectory regime represents a specific stratal stacking patterns, providing new tools to define a model-independent methodology for sequence stratigraphy. Flat to slightly falling shelf-edge trajectories and progradational and downstepping stacking patterns are empirically related to large-scale, sand-rich gravity flows and associated bigger and thicker sand-rich submarine fan systems. Slightly rising shelf-edge trajectories and progradational and aggradational stacking patterns are associated with mixed sand/mud gravity flows and moderate-scale slope-sand deposits. Steeply rising shelf-edge trajectories and dominantly aggradational stacking patterns are fronted by large-scale mass-wasting processes and associated areally extensive mass-transport systems. Therefore, given a constant sediment supply, then $${T}_{\mathrm{se}}$$ , $$\mathrm{d}y/\mathrm{d}x$$ , $${R}_{\mathrm{c}}$$ , and $${A}_{\mathrm{s}}/{A}_{\mathrm{b}}$$ are all proportional to intensity of mass-wasting processes and to amounts of mass-transport deposits, and are inversely proportional to the intensity of sand-rich gravity flows and to amounts of deep-water sandstone. These relationships can be employed to relate quantitative characteristics of shelf-edge trajectories and stratal stacking patterns to deep-water sedimentation styles.

Print ISSN: 0149-1423

Digitale ISSN: 0149-1423

Thema: Geologie und Paläontologie

Publiziert von American Association of Petroleum Geologists (AAPG)

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

8

Unbekannt

Antisymmetric magnetoresistance in van der Waals Fe3GeTe2/graphite/Fe3GeTe2 trilayer heterostructures (2019)

Albarakati, S., Tan, C., Chen, Z.-J., Partridge, J. G., Zheng, G., Farrar, L., Mayes, E. L. H., Field, M. R., Lee, C., Wang, Y., Xiong, Y., Tian, M., Xiang, F., Hamilton, A. R., Tretiakov, O. A., Culcer, D., Zhao, Y.-J., Wang, L.

American Association for the Advancement of Science (AAAS)

In: Science Advances

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2019

Beschreibung: 〈p〉With no requirements for lattice matching, van der Waals (vdW) ferromagnetic materials are rapidly establishing themselves as effective building blocks for next-generation spintronic devices. We report a hitherto rarely seen antisymmetric magnetoresistance (MR) effect in vdW heterostructured Fe〈sub〉3〈/sub〉GeTe〈sub〉2〈/sub〉 (FGT)/graphite/FGT devices. Unlike conventional giant MR (GMR), which is characterized by two resistance states, the MR in these vdW heterostructures features distinct high-, intermediate-, and low-resistance states. This unique characteristic is suggestive of underlying physical mechanisms that differ from those observed before. After theoretical calculations, the three-resistance behavior was attributed to a spin momentum locking induced spin-polarized current at the graphite/FGT interface. Our work reveals that ferromagnetic heterostructures assembled from vdW materials can exhibit substantially different properties to those exhibited by similar heterostructures grown in vacuum. Hence, it highlights the potential for new physics and new spintronic applications to be discovered using vdW heterostructures.〈/p〉

Digitale ISSN: 2375-2548

Thema: Allgemeine Naturwissenschaft

Publiziert von American Association for the Advancement of Science (AAAS)

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

9

Unbekannt

Compressor map regression modelling based on partial least squares (2018)

Li, X., Yang, C., Wang, Y., Wang, H., Zu, X., Sun, Y., Hu, S.

Royal Society

In: Royal Society Open Science

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2018-08-30

Beschreibung: In this work, two kinds of partial least squares modelling methods are applied to predict a compressor map: one uses a power function polynomial as the basis function (PLSO), and the other uses a trigonometric function polynomial (PLSN). To demonstrate the potential capabilities of PLSO and PLSN for a typical interpolated prediction and an extrapolated prediction, they are compared with two other classical data-driven modelling methods, namely the look-up table and artificial neural network (ANN). PLSO and PLSN are also compared with each other. The results show that PLSO and PLSN have a better prediction performance than the look-up table and the ANN, especially for the extrapolated prediction. The computational time is also decreased sharply. Compared with PLSO, PLSN is characterized by a higher prediction accuracy and shorter computational time than PLSO. It is expected that PLSN could save computational time and also improve the accuracy of a thermodynamic model of a diesel engine.

Schlagwort(e): mathematical modelling, mechanical engineering, power and energy systems

Digitale ISSN: 2054-5703

Thema: Allgemeine Naturwissenschaft

Publiziert von Royal Society

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext

10

Unbekannt

Tropism for tuft cells determines immune promotion of norovirus pathogenesis (2018)

Wilen, C. B., Lee, S., Hsieh, L. L., Orchard, R. C., Desai, C., Hykes, B. L., McAllaster, M. R., Balce, D. R., Feehley, T., Brestoff, J. R., Hickey, C. A., Yokoyama, C. C., Wang, Y.-T., Mac; Duff, D. A., Kreamalmayer, D., Howitt, M. R., Neil, J. A., Cadwell, K., Allen, P. M., Handley, S. A., van Lookeren Campagne, M., Baldridge, M. T., Virgin, H. W.

American Association for the Advancement of Science (AAAS)

In: Science

zur Merkliste hinzufügen auf der Merkliste

Details

Publikationsdatum: 2018-04-13

Beschreibung: Complex interactions between host immunity and the microbiome regulate norovirus infection. However, the mechanism of host immune promotion of enteric virus infection remains obscure. The cellular tropism of noroviruses is also unknown. Recently, we identified CD300lf as a murine norovirus (MNoV) receptor. In this study, we have shown that tuft cells, a rare type of intestinal epithelial cell, express CD300lf and are the target cell for MNoV in the mouse intestine. We found that type 2 cytokines, which induce tuft cell proliferation, promote MNoV infection in vivo. These cytokines can replace the effect of commensal microbiota in promoting virus infection. Our work thus provides insight into how the immune system and microbes can coordinately promote enteric viral infection.

Schlagwort(e): Microbiology

Print ISSN: 0036-8075

Digitale ISSN: 1095-9203

Thema: Biologie , Chemie und Pharmazie , Geologie und Paläontologie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik

Publiziert von American Association for the Advancement of Science (AAAS)

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

AKTUELLE ARTIKEL

S·F·X

Volltext