نتایج جستجو برای: meadows

تعداد نتایج: 2563  

Journal: :J. Applied Logic 2011
Jan A. Bergstra Kees Middelburg

An inversive meadow is a commutative ring with identity and a total multiplicative inverse operation satisfying 0 = 0. Previously, inversive meadows were shortly called meadows. In this paper, we introduce divisive meadows, which are inversive meadows with the multiplicative inverse operation replaced by a division operation. We introduce a translation from the terms over the signature of divis...

Journal: :Journal of Applied Logic 2011

Journal: :J. Applied Logic 2016
Jan A. Bergstra Kees Middelburg

Meadows are alternatives for fields with a purely equational axiomatization. At the basis of meadows lies the decision to make the multiplicative inverse operation total by imposing that the multiplicative inverse of zero is zero. Divisive meadows are meadows with the multiplicative inverse operation replaced by a division operation. Viewing a fraction as a term over the signature of divisive m...

Journal: :Remote Sensing 2016
Christopher E. Soulard Christine M. Albano Miguel L. Villarreal Jessica J. Walker

To assess how montane meadow vegetation recovered after a wildfire that occurred in Yosemite National Park, CA in 1996, Google Earth Engine image processing was applied to leverage the entire Landsat Thematic Mapper archive from 1985 to 2012. Vegetation greenness (normalized difference vegetation index (NDVI)) was summarized every 16 days across the 28-year Landsat time series for 26 meadows. D...

2013
Rosalind B. Renfrew Douglas H. Johnson Gary R. Lingle Douglas Robinson ROSALIND B. RENFREW DOUGLAS H. JOHNSON

Native grassland is one of the most heavily degraded of all North American ecosystems, and restoration of altered grasslands is a tool used to mitigate some of the biological ramifications of past land use practices. Providing habitat for grassland-dependent bird species often is one of the many goals of restoration. We evaluated the efficacy of meadow restoration for breeding birds in the Nebr...

Journal: :CoRR 2009
Jan A. Bergstra Kees Middelburg

An inversive meadow is a commutative ring with identity equipped with a total multiplicative inverse operation satisfying 0 −1 = 0. Previously, inversive meadows were shortly called meadows. A divisive meadow is an inversive meadows with the multiplicative inverse operation replaced by a division operation. In the spirit of Peacock's arithmetical algebra, we introduce variants of inversive and ...

Journal: :J. Applied Logic 2015
Jan A. Bergstra Kees Middelburg

Meadows have been proposed as alternatives for fields with a purely equational axiomatization. At the basis of meadows lies the decision to make the multiplicative inverse operation total by imposing that the multiplicative inverse of zero is zero. Thus, the multiplicative inverse operation of a meadow is an involution. In this paper, we study 'non-involutive meadows', i.e. variants of meadows ...

2017
E Pernilla Brinkman Ciska E Raaijmakers Wietse de Boer Wim H van der Putten

It is increasingly acknowledged that soil biota may influence interactions among plant species; however, little is known about how to change historical influences of previous land management on soil biota, the so-called 'biotic soil legacy effect'. We used a two-phase plant community-soil feedback approach to study how plant species typical to original (i.e. undisturbed) and degraded fen meadow...

2017
David Tomasko Stephen Crooks Doug Robison

As of 2012, there were an estimated 14,243 ha of seagrass meadows in Tampa Bay. Seagrass meadows are the dominant blue carbon habitat in Tampa Bay, compared to the estimated 6,127 ha of mangroves and 1,779 ha of saltmarsh. However, and unlike mangroves and saltmarshes, the entirety of carbon fixation, growth and decay in seagrass meadows occurs in a submerged environment. While rates of primary...

2008
Eva Knop Bernhard Schmid Felix Herzog

Agri-environment schemes are the most widely adopted political measure to maintain and restore farmland biodiversity in Europe. However, abiotic and biotic factors often limit the success of ecological restoration. Among the biotic factors, the size of the local and regional species pool is a major constraint. This is only well documented for plants. We therefore wanted to know if a small regio...

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