نتایج جستجو برای: eco

تعداد نتایج: 19236  

2017
Pyoungsoo Lee You-Jin Park

This paper proposes an extended data envelopment analysis (DEA) model for deriving eco-efficiency. In order to derive eco-efficiency, the proposed model utilizes the concepts of operational efficiency and environmental efficiency. Since DEA can separately measure operational efficiency and environmental efficiency, the treatment for constructing the unified indicator is required to ultimately e...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Minoru Kasada Masato Yamamichi Takehito Yoshida

Evolution on a time scale similar to ecological dynamics has been increasingly recognized for the last three decades. Selection mediated by ecological interactions can change heritable phenotypic variation (i.e., evolution), and evolution of traits, in turn, can affect ecological interactions. Hence, ecological and evolutionary dynamics can be tightly linked and important to predict future dyna...

2016
Fredrik Paulson Erik Sundin

Despite years of research and other activities in society the anthropogenic impact on nature still increase. Eco-design has a potential to reduce this impact, but yet a minority of companies practice it. The aim of this paper is to identify current challenges and trends within eco-design. In addition, the paper further aims to disclose important eco-design related research gaps. Eco-design chal...

2014
Hualin Xie Guanrong Yao Peng Wang

Ecological security and environmental sustainability are the foundations of sustainable development. With the acceleration of urbanization, increasing human activities have promoted greater impacts on the eco-spaces that maintain ecological security. Regional key eco-space has become the primary need to maintain environmental sustainability and can offer society with continued ecosystem service...

Journal: :Environmental toxicology and chemistry 2002
Helen M Regan Brad E Sample Scott Ferson

The U.S. Environmental Protection Agency (U.S. EPA) is sponsoring development of ecological soil screening levels (Eco-SSLs) for terrestrial wildlife. These are intended to be used to identify chemicals of potential ecological concern at Superfund sites. Ecological soil screening levels represent concentrations of contaminants in soils that are believed to be protective of ecological receptors....

2013
Juan Qiu

Eco-hotels are promoted to minimize the negative impacts on the environment. The author, therefore, makes a critical study of English eco-hotel profiles in order to decode the ecological thoughts embodied in the profiles. Based on Fairclough’s three-dimensional model, this study follows the three steps: description of linguistic features in terms of transitivity, interpretation of ecological th...

Journal: :Ecology letters 2013
Ming Nie Elise Pendall Colin Bell Caley K Gasch Swastika Raut Shanker Tamang Matthew D Wallenstein

Soil microbial communities may be able to rapidly respond to changing environments in ways that change community structure and functioning, which could affect climate-carbon feedbacks. However, detecting microbial feedbacks to elevated CO(2) (eCO(2) ) or warming is hampered by concurrent changes in substrate availability and plant responses. Whether microbial communities can persistently feed ...

1996
Bruce B. Lowekamp Adam Beguelin

PVM and other distributed computing systems have enabled the use of networks of workstations for parallel computation, but their approach of treating all networks as collections of point-to-point connections does not promote e cient communication|particularly collective communication. The E cient Collective Operations package (ECO) contains programs which solve this problem by analyzing the net...

2010
Carmen ZAHARIA

* E-mail: [email protected] ABSTRACT Starting with the reform of 1999 (named Agenda 2000), the Common Agricultural Policy has two main directions: market policy and sustainable development of rural zones. Since 2003, the environmental aspects were better integrated into the agricultural policy that included new measures or improvements of the existing ones, in order to promote the environment p...

Innovativeness, determining the development potential of enterprises and economies, and hence the economic welfare of societies, became an important area of interest for both theoreticians and especially economic life practitioners. Thus, in this study of the subject there can be found numerous definitions and types of innovation, including environmental innovation, being a response to the dema...

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