Community recreation planning by computer simulation

1971 ◽  
Author(s):  
William L. Tullar ◽  
Wayne F. Cascio
2019 ◽  
Vol 18 (1) ◽  
pp. 49-70 ◽  
Author(s):  
Jinwon Kim ◽  
Seong Ok Lyu ◽  
HakJun Song

Beaches are an important recreational setting due to their provision of ideal open spaces for diverse water– and land–based recreation opportunities. Despite the importance of assessing the environmental justice of public beach access, few empirical studies have been conducted in community recreation. Using an environmental justice framework, this study examined whether inequities exist for certain racial/ethnic and socioeconomic groups with respect to the distribution of public beach access in the Detroit Metropolitan Area. Results indicated that inequitable public beach access is associated with population density, median housing value, elderly population, and nonvehicle ownership. Such findings can help public leisure agencies to assess environmental justice, a first step in developing more effective community recreation planning and management policies. Study implications, limitations, and recommendations for further research are also discussed.


Author(s):  
Kiyomichi Nakai ◽  
Yusuke Isobe ◽  
Chiken Kinoshita ◽  
Kazutoshi Shinohara

Induced spinodal decomposition under electron irradiation in a Ni-Au alloy has been investigated with respect to its basic mechanism and confirmed to be caused by the relaxation of coherent strain associated with modulated structure. Modulation of white-dots on structure images of modulated structure due to high-resolution electron microscopy is reduced with irradiation. In this paper the atom arrangement of the modulated structure is confirmed with computer simulation on the structure images, and the relaxation of the coherent strain is concluded to be due to the reduction of phase-modulation.Structure images of three-dimensional modulated structure along <100> were taken with the JEM-4000EX high-resolution electron microscope at the HVEM Laboratory, Kyushu University. The transmitted beam and four 200 reflections with their satellites from the modulated structure in an fee Ni-30.0at%Au alloy under illumination of 400keV electrons were used for the structure images under a condition of the spherical aberration constant of the objective lens, Cs = 1mm, the divergence of the beam, α = 3 × 10-4 rad, underfocus, Δf ≃ -50nm and specimen thickness, t ≃ 15nm. The CIHRTEM code was used for the simulation of the structure image.


2019 ◽  
Vol 3 (6) ◽  
pp. 723-729
Author(s):  
Roslyn Gleadow ◽  
Jim Hanan ◽  
Alan Dorin

Food security and the sustainability of native ecosystems depends on plant-insect interactions in countless ways. Recently reported rapid and immense declines in insect numbers due to climate change, the use of pesticides and herbicides, the introduction of agricultural monocultures, and the destruction of insect native habitat, are all potential contributors to this grave situation. Some researchers are working towards a future where natural insect pollinators might be replaced with free-flying robotic bees, an ecologically problematic proposal. We argue instead that creating environments that are friendly to bees and exploring the use of other species for pollination and bio-control, particularly in non-European countries, are more ecologically sound approaches. The computer simulation of insect-plant interactions is a far more measured application of technology that may assist in managing, or averting, ‘Insect Armageddon' from both practical and ethical viewpoints.


1978 ◽  
Vol 23 (9) ◽  
pp. 649-650
Author(s):  
ARTHUR M. FARLEY
Keyword(s):  

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