Results 1 to 10 of about 491,948 (164)

Spatial structure of city population growth [PDF]

open access: yesNature Communications, 2022
A new study finds that city growth in the U.S. is spatially heterogeneous. Inter-city flows concentrate in core areas. Intra-city flows are generally directed towards external and low density counties of cities, and is the main contributor to urban ...
Sandro M. Reia   +3 more
doaj   +6 more sources

Network structure and city size. [PDF]

open access: yesPLoS One, 2012
Network structure varies across cities. This variation may yield important knowledge about how the internal structure of the city affects its performance. This paper systematically compares a set of surface transportation network structure variables (connectivity, hierarchy, circuity, treeness, entropy, accessibility) across the 50 largest metropolitan
Levinson D.
europepmc   +7 more sources

Nonlinear Dynamics of Two-State Quantum Dot Lasers under Optical Feedback

open access: yesPhotonics, 2021
A modified rate equation model was presented to theoretically investigate the nonlinear dynamics of solitary two-state quantum dot lasers (TSQDLs) under optical feedback. The simulated results showed that, for a TSQDL biased at a relatively high current,
Xiang-Hui Wang   +3 more
doaj   +1 more source

Synthesis and Anti-Neuroinflammatory Activity of 1,7-diphenyl-1,4-heptadien-3-ones in LPS-Stimulated BV2 Microglia Via Inhibiting NF-κB/MAPK Signaling Pathways

open access: yesMolecules, 2022
A series of 1,7-diphenyl-1,4-heptadien-3-ones with various substituents (HO-, CH3O-, CH3-, Cl-) on the phenyl rings were synthesized and evaluated for anti-neuroinflammatory effects in LPS-stimulated BV2 microglia. The pharmacological results showed that
Xuan Zhao   +6 more
doaj   +1 more source

Trade and the structure of cities [PDF]

open access: yesJournal of Urban Economics, 2007
Our purpose is to investigate how the interplay between trade, commuting and communication costs shapes the economy at both the interregional and intra-urban levels. Specifically, we study how economic integration affects the internal structure of cities and show how decentralizing the production and consumption of goods in secondary employment centers
Cavailhes, Jean   +3 more
openaire   +6 more sources

Temporal and regulatory dynamics of the inner ear transcriptome during development in mice

open access: yesScientific Reports, 2022
The inner ear controls hearing and balance, while the temporal molecular signatures and transcriptional regulatory dynamics underlying its development are still unclear. In this study, we investigated time-series transcriptome in the mouse inner ear from
Rui Cao   +6 more
doaj   +1 more source

Measuring the Spatial Dimension of a Smart City: A New Tool for Measuring and Evaluating a Smart City’s Urban Form

open access: yesTechnical Transactions, 2023
This study discusses the link between the idea of the Smart City and urban form. The paper aims to fill a research gap in terms of the physical structure of a Smart City by investigating how its spatial dimension can be evaluated and measured.
Gorgol Natalia K.
doaj   +1 more source

Semaphorin-3A Promotes Degradation of Fragile X Mental Retardation Protein in Growth Cones via the Ubiquitin-Proteasome Pathway

open access: yesFrontiers in Neural Circuits, 2020
Fragile X mental retardation protein (FMRP) is an RNA-binding protein that regulates local translation in dendrites and spines for synaptic plasticity. In axons, FMRP is implicated in axonal extension and axon guidance.
Masaru Takabatake   +2 more
doaj   +1 more source

Theoretical Explanation of Polycentric Compact City Structure to Create a Sustainable Urban form [PDF]

open access: yesجغرافیا و آمایش شهری منطقه‌ای, 2021
The spatial structure of cities has changed a lot after technological changes and population growth and they have shifted from a monocentric compact city structure to an extended and scattered structure that poses many challenges and they have made human
Mahmood Arvin, Ahmad Poor Ahmad
doaj   +1 more source

Distinctive synaptic structural motifs link excitatory retinal interneurons to diverse postsynaptic partner types

open access: yesCell Reports, 2023
Summary: Neurons make converging and diverging synaptic connections with distinct partner types. Whether synapses involving separate partners demonstrate similar or distinct structural motifs is not yet well understood.
Wan-Qing Yu   +7 more
doaj   +1 more source

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