نتایج جستجو برای: parks

تعداد نتایج: 8151  

Journal: :Science 2001
J K Vanclay

, 1007a (2001); 293 Science et al. Jerome K. Vanclay, The Effectiveness of Parks This copy is for your personal, non-commercial use only. . clicking here colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others . here following the guidelines can be obtained by Permission to republish or repurpose articles or portions of ...

A Anamipor A Shafie A. Ghorbani Ranjbary Sh Najy

Abstract Background & Aims: Toxocariasis or visceral larva migrans syndrome is a disease that appears by attack of extra intestinal animal nematode larvae of Toxocara canis to the human tissues. The present study was performed to evaluate the frequency of Toxocara eggs in public parks of Shiraz /Iran. Methods: A total of 20 parks from different regions of shiraz city were selected, and from dif...

Journal: :Science 2001
A G Bruner R E Gullison R E Rice G A da Fonseca

We assessed the impacts of anthropogenic threats on 93 protected areas in 22 tropical countries to test the hypothesis that parks are an effective means to protect tropical biodiversity. We found that the majority of parks are successful at stopping land clearing, and to a lesser degree effective at mitigating logging, hunting, fire, and grazing. Park effectiveness correlates with basic managem...

Journal: :International journal of biometeorology 2012
Lauren B Buckley Madison S Foushee

Climate change has driven many organisms to shift their seasonal timing. Are humans also shifting their weather-related behaviors such as outdoor recreation? Here we show that peak attendance in US national parks experiencing climate change has shifted 4 days earlier since 1979. Of the nine parks experiencing significant increases in mean spring temperatures, seven also exhibit shifts in the ti...

2014
Annette Voigt Nadja Kabisch Daniel Wurster Dagmar Haase Jürgen Breuste

Urban green spaces provide important recreational services for urban residents. In general, when park visitors enjoy "the green," they are in actuality appreciating a mix of biotic, abiotic, and man-made park infrastructure elements and qualities. We argue that these three dimensions of structural diversity have an influence on how people use and value urban parks. We present a straightforward ...

2008
Caitlin M. Mulcahy

Parks have long been sites for sexual activity, deviant behaviour, violence, and prostitution (Flowers, Hart, & Marriot, 1999; Humphreys, 1970; Mitchell, 1995). Yet leisure researchers have tended to leave these less socially acceptable activities unexamined, focusing their analyses instead on the “benefits” of leisure (Glover, 2003; Rojek, 1999, 2000). This research aims to deviate from the “b...

In the event of voltage sag at the nearing of a wind park, severe currents may pass through the power electronic devices of the Doubly Fed Induction Generators (DFIGs). Hence, according to the Low Voltage Ride Through (LVRT) requirements, the wind parks are allowed to disconnect from the network after a certain time. Therefore, to avoid such actions, the LVRT requirement of wind parks is consid...

2008
JOHN L. CROMPTON

Relatively concise executive summaries are provided for the scientific evidence supporting the parks field’s contribution to five elements of environmental sustainability: protecting drinking water, controlling flooding, cleaning air, reducing energy costs, and preserving biological diversity. Given the importance of economics in government resource allocation decisions, the discussion stresses...

2003
Alexander Almer Herwig Zeiner Christian Derler Harald Stelzl Patrick Luley

The tourism in rural areas and national parks can be regarded as a very sensitive economic factor. On the one hand eco-tourism regions and especially national parks have to present their natural environment and fascinate landscape. On the other hand they have to guide tourist streams to avoid negative effects on their assets. This paper will briefly discuss the current situation of the digital ...

2002
J. A. Vasconcelos R. L. S. Adriano D. A. G. Vieira G. F. D. Souza H. S. Azevedo

In this paper the effects of elitism in the Nondominated Sorting Genetic Algorithm (NSGA) are analyzed. Three different kinds of elitism: standard, clustering and Parks & Miller techniques are investigated using two test problems. For the studied problems, the Parks & Miller mechanism generated the best results. Finally, the NSGA with Parks & Miller elitism was applied to determine the nondomin...

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