scholarly journals The Influence of Strip-City Street Network Structure on Spatial Vitality: Case Studies in Lanzhou, China

Land ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1107
Author(s):  
Xin Li ◽  
Yongsheng Qian ◽  
Junwei Zeng ◽  
Xuting Wei ◽  
Xiaoping Guang
Keyword(s):  
Network Structure ◽  
Temporal Distribution ◽  
Temporal Heterogeneity ◽  
Street Network ◽  
Hotspot Analysis ◽  
Syntactic Theory ◽  
City Street ◽  
Spatial And Temporal Heterogeneity ◽  
Street Space

In the context of China’s recent urbanization, the agglomeration and diffusion of the strip-city spatial network are gradually being reconstructed. The ways in which the street network structure affects the underlying logic of economic and social development is worthy of in-depth consideration. This study takes Lanzhou (a typical strip city in China) as a case study, using dynamic, geographic, big data and spatial syntactic-theory models to explore the influence of street network accessibility and structure on the spatial and temporal distribution of strip-city spatial vitality. We use Hotspot Analysis (Getis-Ord Gi*) to analyze the dispersal characteristics of street space vitality. In addition, the spatial and temporal heterogeneity characteristics and mechanism of the influence of street accessibility on spatial vitality are evaluated using the spatial Durbin model (SDM). The results show that: the temporal and spatial performance of urban vitality on weekdays and weekends conforms to people’s daily activities, offering similar spatial agglomeration and dispersion effects; accessibility and pedestrian-friendly streets have better urban spatial vitality clustering; street network integration significantly affects the reshaping of urban vitality, but there is apparent temporal heterogeneity in the degree of impact.

scholarly journals Cross-shelf Heterogeneity of Coral Assemblages in Northwest Australia

Diversity ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 15 ◽  
Author(s):  
Molly Moustaka ◽  
Margaret Mohring ◽  
Thomas Holmes ◽  
Richard Evans ◽  
Damian Thomson ◽  
...  
Keyword(s):  
Coral Cover ◽  
Temporal Trends ◽  
Temporal Distribution ◽  
Temporal Heterogeneity ◽  
Marine Systems ◽  
The Past ◽  
Spatial And Temporal Heterogeneity ◽  
Scientific Datasets ◽  
Intermediate Distance ◽  
Northwest Australia

Understanding the spatial and temporal distribution of coral assemblages and the processes structuring those patterns is fundamental to managing reef assemblages. Cross-shelf marine systems exhibit pronounced and persistent gradients in environmental conditions; however, these gradients are not always reliable predictors of coral distribution or the degree of stress that corals are experiencing. This study used information from government, industry and scientific datasets spanning 1980–2017, to explore temporal trends in coral cover in the geographically complex system of the Dampier Archipelago, northwest Australia. Coral composition at 15 sites surveyed in 2017 was also modelled against environmental and spatial variables (including turbidity, degree heat weeks, wave exposure, and distance to land/mainland/isobath) to assess their relative importance in structuring coral assemblages. High spatial and temporal heterogeneity was observed in coral cover and recovery trajectories, with reefs located an intermediate distance from the shore maintaining high cover over the past 20 years. The abundance of some prominent genera in 2017 (Acropora, Porites, and Turbinaria spp.) decreased with the distance from the mainland, suggesting that inshore processes play an important role in dictating the distribution of these genera. The atypical distributions of these key reef-building corals and spatial heterogeneity of historical recovery trajectories highlight the risks in making assumptions regarding cross-shelf patterns in geographically complex systems.

Spatial and temporal heterogeneity of forest site productivity drivers: a case study within the eastern boreal forests of Canada

2014 ◽  
Vol 29 (5) ◽  
pp. 905-918 ◽  
Author(s):  
Kenneth A. Anyomi ◽  
Frédéric Raulier ◽  
Yves Bergeron ◽  
Daniel Mailly ◽  
Martin P. Girardin
Keyword(s):  
Boreal Forests ◽  
Forest Site ◽  
Temporal Heterogeneity ◽  
Site Productivity ◽  
Spatial And Temporal Heterogeneity

scholarly journals Compatibility of Automated Vehicles in Street Spaces: Considerations for a Sustainable Implementation

2021 ◽  
Vol 13 (5) ◽  
pp. 2732
Author(s):  
Aggelos Soteropoulos ◽  
Martin Berger ◽  
Mathias Mitteregger
Keyword(s):  
Travel Behavior ◽  
Traffic Volume ◽  
Street Network ◽  
Automated Vehicles ◽  
Sustainable Implementation ◽  
Street Space ◽  
Traffic Volumes ◽  
Multi Agent ◽  
The City

Automated Vehicles (AVs) will bring a fundamental change in the mobility sector in the coming years. Whereas many studies emphasize opportunities with AVs, studies on the impacts of AVs on travel behavior particularly show an overall increase in traffic volume. This increase could impair the needs of other uses and users within street spaces and decrease the permeability of the street space for pedestrians and cyclists. However, only a few studies, so far, have looked at the changes of traffic volume due to AVs at the street level, and to what extent these impair the needs of other uses and users within different street spaces was not in the focus at all. This paper investigates the compatibility of AVs in street spaces, building on different modeling results of scenarios with AVs based on the Multi-Agent Traffic Simulation (MATSim) framework. Using the so-called compensatory approach and the whole street network of Vienna, Austria, as a case study, we examine how compatible AVs and their related changes in traffic volume are with the needs of other uses and users, i.e., pedestrians and cyclists, within different street spaces, by specifically considering the various characteristics of the latter. Results show that the effects of AVs on the compatibility of street spaces would be unevenly distributed across the city. For Shared Automated Vehicles (SAVs), a deterioration in compatibility is observable, especially in inner-city dense areas, because of an increase in traffic volume and an already high amount of competing uses. In contrast, especially (on main roads) in the outskirts, improvements in compatibility are possible. This particularly applies to SAVs with a stop-based service. However, private AVs interlinked with an overall capacity increase would lead to a deterioration in compatibility, especially in parts of the higher-level street network that already have incompatible traffic volumes, further increasing the separating or barrier effect of such streets. The results can provide insights for policymakers and stakeholders about where and how to facilitate AVs, to reach an implementation that is compatible with the different uses and needs of users within street spaces: While SAVs should be implemented particularly in the outskirts, as a complement for public transport, an implementation of AVs in the lower-level street network in inner parts of the city should not be facilitated, or it should at least be linked to measures that make street spaces more compatible with the needs of pedestrians and cyclists, e.g., implementation of walking and cycling infrastructure.

scholarly journals Exploring the Transformation in the ‘Spirit of Place’ by Considering the Changed and Unchanged Defensive Spaces of Settlements: A Case Study of the Wugoushui Hakka Settlement

Land ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 490
Author(s):  
Yan-Feng He ◽  
Chie-Peng Chen ◽  
Rung-Jiun Chou ◽  
Hai-Feng Luo ◽  
Jin-Xiong Hou
Keyword(s):  
Sense Of Belonging ◽  
Theoretical Foundation ◽  
Cultural Preservation ◽  
Street Network ◽  
Context Analysis ◽  
Network Nodes ◽  
Site Analysis ◽  
Spirit Of Place ◽  
Depth Interviews

Over generations, economic development has accelerated traditional settlements in Taiwan while losing traditional culture. In Hakka villages, this is manifested in the changes in defensive spaces, the ‘spirit of place,’ and land use. Although some progress has been made through research into related issues, a correlated view has been missing. To explore the connection between the ‘spirit of place’ and defensive spaces in Wugoushui, a traditional representative settlement in Taiwan, this paper probes three questions: What are the changes in defensive spaces? What are the changes in the spirit of place? What are the connections between them? Taking the sixteen criteria of secure defensive space as the theoretical foundation, through more than a year of structured observations and in-depth interviews with ten representative residents, and based on context analysis and site analysis of the information collected, this paper has concluded that, although the actual functionality of Wugoushui settlement’s spiritual, behavioural, and physical defences have disappeared, cultural characteristics related to the settlement traditions, including religious beliefs, trust, sense of belonging, street network, nodes, institutions, territory, and social networks, constitute a concrete manifestation of the defensive space and the spirit of place as of today. This research contributes to developing a theory of the relevance of the spirit of place to the defensive space of settlements from a sustainability perspective and improving the cultural preservation and land management of traditional settlements.

scholarly journals A New Methodology to Study Street Accessibility: A Case Study of Avila (Spain)

2021 ◽  
Vol 10 (7) ◽  
pp. 491
Author(s):  
Manuel Curado ◽  
Rocio Rodriguez ◽  
Manuel Jimenez ◽  
Leandro Tortosa ◽  
Jose F. Vicent
Keyword(s):  
Network Analysis ◽  
The Other ◽  
Centrality Measures ◽  
Innovative Behavior ◽  
Street Network ◽  
Commercial Activity ◽  
Determining Factors ◽  
Combine Network ◽  
The City

Taking into account that accessibility is one of the most strategic and determining factors in economic models and that accessibility and tourism affect each other, we can say that the study and improvement of one of them involved the development of the other. Using network analysis, this study presents an algorithm for labeling the difficulty of the streets of a city using different accessibility parameters. We combine network structure and accessibility factors to explore the association between innovative behavior within the street network, and the relationships with the commercial activity in a city. Finally, we present a case study of the city of Avila, locating the most inaccessible areas of the city using centrality measures and analyzing the effects, in terms of accessibility, on the commerce and services of the city.

Biomass distribution of fishes and mussels mediates spatial and temporal heterogeneity in nutrient cycling in streams

Oecologia ◽  
2018 ◽  
Vol 188 (4) ◽  
pp. 1133-1144 ◽  
Author(s):  
Garrett W. Hopper ◽  
Keith B. Gido ◽  
Caryn C. Vaughn ◽  
Thomas B. Parr ◽  
Traci G. Popejoy ◽  
...  
Keyword(s):  
Nutrient Cycling ◽  
Temporal Heterogeneity ◽  
Biomass Distribution ◽  
Spatial And Temporal Heterogeneity
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