نتایج جستجو برای: ecological phenomena

تعداد نتایج: 218427  

2002
Lucinda B. Johnson

In ecological studies the recent emphasis on larger study areas over longer time spans has coincided with the development of geographical information systems (GIs). GISs are a set of computer hardware and software for analyzing and displaying spatially referenced features (i.e. , points, lines, polygons) with non-geographic attributes (i.e., species, age). In the fields of natural resources man...

2009
Wassily Lubashevsky Ihor Lubashevsky Reinhard Mahnke

Self-regulation of living tissue as an example of self-organization phenomena in hierarchical systems of biological, ecological, and social nature is under consideration. The characteristic feature of these systems is the absence of any governing center and, thereby, their self-regulation is based on a cooperative interaction of all the elements. The work develops a mathematical theory of a vas...

Journal: :BioEssays : news and reviews in molecular, cellular and developmental biology 2005
Eric R Pianka Samuel S Sweet

Geckos have gained ecological access to novel microhabitats by exploiting intermolecular van der Waals forces, which allow them to climb smooth vertical surfaces. They use microscopic surface-based phenomena to thrive in a macroscopic mass- and kinetic energy-based world. Here we detail this as a premier example of integrative biology, spanning seven orders of magnitude and a lot of interesting...

Journal: :Sustainability 2021

The multidisciplinary fields of study on sustainability, which relate to ecological, geophysical, societal and environmental research, demand for the availability processing data that is capable represent spatial phenomena [...]

it is not possible to understand developments of a country’s culture and civilization without knowing his believes and myths. whether it is north or south, east or west, planes or mountains, sahara or deserts, here in iran every corner includes valuable and precious treasures which are known all over the world, and cultural – historical objects which are found here adorn all well known museums of the globe. zagros mountains, lorestan province locating at the heart of that, are not only the same, but are more prominent than other iranian regions. you can not find someone who does not know what the lorestani bronzes are, and there is no museum that not be pride of having a piece of that. the said bronzes which are manufactured four millenniums b.c. are admired nearly by all those researchers because of their beauty, diversity and technique. lorestani artistic works including stone engraves, bronzes and clays, show an ideal and metaphysical world beside real world which explain mental system of human beings on that era against sensations and phenomena happening around them. men main mental occupation on that time was he unknown world which had surrounded them, and they used to use the religion to fight life’s natural factors, and art was a tool of religious and mythical painting which was far from reality and had entered into the abstract domain. as natural objects have become subjects of lorestani art, it cleanses them from any non – intrinsic limitations and external factors which surround them and darken their meanings, and just shows their main specifications. artist in the said civilization is not searching for realism. although these are few works showing the nature, but in effect there is no wish to imitate touchable factors of the nature, and artist has turned real phenomena to encoded signs as per his own mentality. this procedure is called stylization.

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده هنر و معماری 1391

it is not possible to understand developments of a country’s culture and civilization without knowing his believes and myths. whether it is north or south, east or west, planes or mountains, sahara or deserts, here in iran every corner includes valuable and precious treasures which are known all over the world, and cultural – historical objects which are found here adorn all well known museums...

2013
Cang Hui

Ecology studies biodiversity in its variety and complexity. It describes how species distribute and perform in response to environmental changes. Ecological processes and structures are highly complex and adaptive. In order to quantify emerging ecological patterns and investigate their hidden mechanisms, we need to rely on the simplicity of mathematical language. This becomes especially apparen...

2004
Alexandre Muzy Eric Innocenti David R.C. Hill Antoine Aïello Jean-François Santucci

An important class of ecological problems concerns propagation processes. In ecological modelling, these phenomena generally occur on large scales and are generally difficult to efficiently simulate because of the number of entities and connections between entities. Studies of this kind of phenomena lack genericity and reusability because they are often presented through the point of view of a ...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2009
Jason B Wolf Michael J Wade

Maternal effects can play an important role in a diversity of ecological and evolutionary processes such as population dynamics, phenotypic plasticity, niche construction, life-history evolution and the evolutionary response to selection. However, although maternal effects were defined by quantitative geneticists well over half a century ago, there remains some confusion over exactly what pheno...

2009
John Eid

www.sciencemag.org (this information is current as of February 2, 2009 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/323/5910/133 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/1162986/DC1 can be found at:...

Journal: :Journal of theoretical biology 2010
Sanjeeva Balasuriya

The speed and the minimum carrying capacity needed for a successful population expansion into new territory are addressed using a reaction-diffusion model. The model is able to encapsulate a rich collection of ecological behaviours, including the Allee effect, resource depletion due to consumption, dispersal adaptation due to population pressure, biological control agents, and a range of breedi...

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