Results 61 to 70 of about 148,828 (311)

Machine learning for activity-based road transportation emissions estimation

open access: yesEnvironmental Data Science, 2023
Measuring and attributing greenhouse gas (GHG) emissions remains a challenging problem as the world strives toward meeting emissions reductions targets.
Derek Rollend   +9 more
doaj   +1 more source

The traffic phases of road networks [PDF]

open access: yesTransportation Research Part C: Emerging Technologies, 2011
We study the relation between the average traffic flow and the vehicle density on road networks that we call 2D-traffic fundamental diagram. We show that this diagram presents mainly four phases. We analyze different cases. First, the case of a junction managed with a priority rule is presented, four traffic phases are identified and described, and a ...
Farhi, Nadir   +2 more
openaire   +3 more sources

Using a random road graph model to understand road networks robustness to link failures

open access: yes, 2020
Disruptions to the transport system have a greater impact on society and the economy now than ever before due to the increased interconnectivity and interdependency of the economic sectors.
Neves, Luis A.C.   +4 more
core   +1 more source

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

open access: yesFEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil   +4 more
wiley   +1 more source

A Representation Method for Complex Road Networks in Virtual Geographic Environments

open access: yesISPRS International Journal of Geo-Information, 2017
Road networks are important for modelling the urban geographic environment. It is necessary to determine the spatial relationships of road intersections when using maps to help researchers conduct virtual urban geographic experiments (because a road ...
Peibei Zheng   +5 more
doaj   +1 more source

The ubiquitin‐proteasome system and autophagy as guardians of the cellular proteome

open access: yesFEBS Letters, EarlyView.
This Perspective covers the three principles governing the crosstalk between the ubiquitin‐proteasome system and autophagy in cellular proteostasis: (1) a shared ubiquitin code routing substrates via shuttle factors or autophagy receptors; (2) spatial compartmentalization into phase‐separated degradation hubs and organelle‐specific modules (exemplified
Ivan Dikic
wiley   +1 more source

The Rauischholzhausen Agenda for Road Ecology

open access: yesEcology and Society, 2007
Despite the documented negative effects of roads on wildlife, ecological research on road effects has had comparatively little influence on road planning decisions.
Inga A. Roedenbeck   +7 more
doaj   +1 more source

Constrained Tracking on a Road Network [PDF]

open access: yes, 2006
Many applications of wireless ad hoc sensor and actuator networks (WSANs) rely on the knowledge of node locations. These are challenging to obtain when nodes are mobile and are not equipped with any specific positioning hardware. In this paper, we are interested in scenarios where there are constraints on the movement of nodes, such as with cars on a ...
Michal Piórkowski   +1 more
openaire   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

open access: yesFEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson   +6 more
wiley   +1 more source

TOST: A Topological Semantic Model for GPS Trajectories Inside Road Networks

open access: yesISPRS International Journal of Geo-Information, 2019
To organize trajectory data is a challenging issue for both studies on spatial databases and spatial data mining in the last decade, especially where there is semantic information involved.
Tao Wu, Jianxin Qin, Yiliang Wan
doaj   +1 more source

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