Zobrazeno 1 - 10
of 29
pro vyhledávání: '"P W Wirtz"'
Autor:
Kai W. Wirtz, Nicolas Antunes, Aleksandr Diachenko, Julian Laabs, Carsten Lemmen, Gerrit Lohmann, Rowan McLaughlin, Eduardo Zorita, Detlef Gronenborn
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-12 (2024)
Abstract Human population dynamics and their drivers are not well understood, especially over the long term and on large scales. Here, we estimate demographic growth trajectories from 9 to 3 ka BP across the entire globe by employing summed probabili
Externí odkaz:
https://doaj.org/article/85b075c55f144b0faebcf678651431dc
Publikováno v:
BMJ Open, Vol 13, Iss 4 (2023)
Objective Examine patterns of adult medical use of amphetamine and methylphenidate stimulant drugs, classified in the USA as Schedule II controlled substances with a high potential for psychological or physical dependence.Design Cross-sectional study
Externí odkaz:
https://doaj.org/article/ae9086ec7dd04681afa3a5fa5bc87586
Publikováno v:
BMJ Open, Vol 11, Iss 8 (2021)
Objective To assess the 5-year changes in the adult medical use of central nervous system (CNS) stimulants with higher risk of dependence and evaluate the population characteristics of users and their medical and/or neurological conditions.Design Cro
Externí odkaz:
https://doaj.org/article/02a68911cb7247739ce658b8b0b41fd5
Publikováno v:
Frontiers in Marine Science, Vol 7 (2020)
We here assess long-term trends in marine primary producers in the southern North Sea (SNS) with respect to ongoing regional Earth system changes. We applied a coupled high-resolution (1.5–4.5 km) 3d-physical-biogeochemical regional Earth System mo
Externí odkaz:
https://doaj.org/article/6f3f5a4040f74e41b33e7d1a69ee5c10
Autor:
C. Lemmen, R. Hofmeister, K. Klingbeil, M. H. Nasermoaddeli, O. Kerimoglu, H. Burchard, F. Kösters, K. W. Wirtz
Publikováno v:
Geoscientific Model Development, Vol 11, Pp 915-935 (2018)
Shelf and coastal sea processes extend from the atmosphere through the water column and into the seabed. These processes reflect intimate interactions between physical, chemical, and biological states on multiple scales. As a consequence, coastal
Externí odkaz:
https://doaj.org/article/146e3be8a3ee4e3d8cde3aad1238514f
Publikováno v:
Biogeosciences, Vol 14, Pp 4499-4531 (2017)
Ecosystem models often rely on heuristic descriptions of autotrophic growth that fail to reproduce various stationary and dynamic states of phytoplankton cellular composition observed in laboratory experiments. Here, we present the integration of
Externí odkaz:
https://doaj.org/article/75d780a5328d4b1e9a794947fa5878e9
Publikováno v:
Frontiers in Marine Science, Vol 6 (2019)
Phytoplankton communities are increasingly subject to multiple stressors of natural or anthropogenic origin. The cumulative effect of these stressors, however, may vary considerably from the sum of impacts from individual stressors. Nonlinear effects
Externí odkaz:
https://doaj.org/article/24d0bcf64ed64d4999fc3aa3f9798d9d
Publikováno v:
Biogeosciences, Vol 13, Iss 17, Pp 4863-4876 (2016)
Marine coastal ecosystem functioning is crucially linked to the transport and fate of suspended particulate matter (SPM). Transport of SPM is controlled by, amongst other factors, sinking velocity ws. Since the ws of cohesive SPM aggregates varies si
Externí odkaz:
https://doaj.org/article/50339cf45a6947709afe8edbb6f24242
Autor:
Kai W Wirtz
Publikováno v:
PLoS ONE, Vol 14, Iss 2, p e0212143 (2019)
One of the most striking patterns at the land-ocean interface is the massive increase of chlorophyll-a (CHL) from continental shelves towards the coast, a phenomenon that is classically linked to physical features. Here I propose that the coastal-off
Externí odkaz:
https://doaj.org/article/1e0ebe1c58a8432aa894c28ebad77056
Autor:
Bernd W. Wirtz
Publikováno v:
Palabra Clave, Vol 17, Iss 4, Pp 1041-1065 (2014)
Los modelos de negocio, las cadenas de valor y las competencias son de vi-tal importancia en el logro de ventajas competitivas para las empresas decomunicación. En el campo de la gestión de medios de comunicación, losinvestigadores generalmente di
Externí odkaz:
https://doaj.org/article/7624ea63dab94170b9196803fe295229