نتایج جستجو برای: plant covers
تعداد نتایج: 427683 فیلتر نتایج به سال:
This manuscript presents the results of study snow covers’ influence on interferometric measurements stability industrial infrastructure in vicinity Norilsk city, Russia. Fuel tanks thermal power plant (TPP) were selected as an object due to a well-known accident when about 20,000 tons diesel fuel spilled from one tanks. Sentinel-1 synthetic aperture radar data acquired over territory TPP used ...
AIM The global spread of woody plants into grasslands is predicted to increase over the coming century. While there is general agreement regarding the anthropogenic causes of this phenomenon, its ecological consequences are less certain. We analyzed how woody vegetation of differing cover affects plant diversity (richness and evenness) and multiple ecosystem functions (multifunctionality) in gl...
in this paper $s$ is a monoid with a left zero and $a_s$ (or $a$) is a unitary right $s$-act. it is shown that a monoid $s$ is right perfect (semiperfect) if and only if every (finitely generated) strongly flat right $s$-act is quasi-projective. also it is shown that if every right $s$-act has a unique zero element, then the existence of a quasi-projective cover for each right act implies that ...
Previous studies have found that urbanization often decreases net primary production (NPP), an important integrative measure of ecosystem functioning. In arid environments, however, urbanization may boost productivity by introducing highly productive plant communities and weakening the coupling of plant growth to naturally occurring cycles of water and nutrients. We tested these ideas by compar...
Plants, as well as fungi, use ambient sunlight as information to regulate photomorphogenetic processes. The photobiological control of this information showed that the development of photobiological greenhouse plastic covers simulates a photonic information that leads to a physiological enhancement of plant productivity and fungal disease control, thus minimizing the need for the use of agroche...
Mass spectrometry (MS) imaging provides spatial and molecular information for a wide range of compounds. This tool can be used to investigate metabolic changes in plant physiology and environmental interactions. A major challenge in our study was to prepare tissue sections that were compatible with high spatial resolution analysis and therefore dedicated sample preparation protocols were establ...
We extend the study of steganography schemes with pooling to the case when two changes per cell are allowed. We show that such schemes are equivalent to a new, symmetric version of sum covers known in combinatorial design theory. We give a construction that is better in the information versus distortion metric than the schemes with one change per cell. A number of interesting questions concerni...
We introduce succinct lossless representations of query results called covers. They are subsets of the query results that correspond to minimal edge covers in the hypergraphs of these results. We first study covers whose structures are given by fractional hypertree decompositions of join queries. For any decomposition of a query, we give asymptotically tight size bounds for the covers of the qu...
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