Results 71 to 80 of about 54,771 (221)

Individual mapping of large polymorphic shrubs in high mountains using satellite images and deep learning [PDF]

open access: yesarXiv
Monitoring the distribution and size of long-living large shrubs, such as junipers, is crucial for assessing the long-term impacts of global change on high-mountain ecosystems. While deep learning models have shown remarkable success in object segmentation, adapting these models to detect shrub species with polymorphic nature remains challenging.
arxiv  

Deep-Learning Convolutional Neural Networks for scattered shrub detection with Google Earth Imagery [PDF]

open access: yesarXiv, 2017
There is a growing demand for accurate high-resolution land cover maps in many fields, e.g., in land-use planning and biodiversity conservation. Developing such maps has been performed using Object-Based Image Analysis (OBIA) methods, which usually reach good accuracies, but require a high human supervision and the best configuration for one image can ...
arxiv  

Ethnobotany and folk pharmaceutical knowledge of the major trees or shrubs in North of Iran [PDF]

open access: yesفیزیولوژی محیطی گیاهی, 2006
An ethnopharmacognostic survey on the traditional pharmaceutical knowledge (TPhk) of old and newly introduced natural remedies used for healing humans in two small mountainous area in Goleston province, Northern Iran. Approximately 56 medicine species of
M Mazandarani
doaj  

Forbidden Induced Subgraphs for Bounded Shrub-Depth and the Expressive Power of MSO [PDF]

open access: yesarXiv
The graph parameter shrub-depth is a dense analog of tree-depth. We characterize classes of bounded shrub-depth by forbidden induced subgraphs. The obstructions are well-controlled flips of large half-graphs and of disjoint unions of many long paths. Applying this characterization, we show that on every hereditary class of unbounded shrub-depth, MSO is
arxiv  

Shrub avoidance by an open-adapted ground squirrel in a shrub-encroached environment

open access: yesPLOS ONE
Habitat loss and degradation are leading drivers of the widespread decline in wildlife populations, and understanding how wildlife perceive and navigate their environment is useful for predicting responses to future landscape changes. Small mammals play an important role in their environments, however, many species are threatened by rapid environmental
Alexandra D. Burnett, John L. Koprowski
openaire   +4 more sources

Magnolia mayae (Magnoliaceae), a new species from Chiapas, Mexico

open access: yesBotan‪ical Sciences, 2012
A new species of Magnolia from Chiapas, Mexico is described and illustrated. A table of morphological characters contrasting species of Magnolia Sect. Magnolia in Chiapas is provided. Magnolia mayae is similar to M.
J.Antonio Vázquez-García   +4 more
doaj   +1 more source

Les cendres végétales, matières premières des verres et des émaux : un exemple, les cendres de végétaux utilisées par Fr. D de Montmolin [PDF]

open access: yesarXiv, 2010
The powdery nature and high alkali content of vegetable ashes make them ideal raw materials to be used as modifiers of silicate compositions (glasses, enamels and ceramics). Their utilisation since ancient times is described in the literature of the history of glasses, but studies on the analyses of their composition are still limited.
arxiv  

Vegetable ash as raw material in the production of glasses and enamels, for example the contemporary vegetable ashes from Burgundy, France [PDF]

open access: yesarXiv, 2010
The powdery nature and high alkali content of vegetable ashes make them ideal raw materials to be used as modifiers of silicate compositions (glasses, enamels and ceramics). Their utilisation since ancient times is described in the literature of the history of glasses, but studies on the analyses of their composition are still limited.
arxiv  

Towards angiosperms genome evolution in time [PDF]

open access: yesarXiv, 2013
In this communication, direction of evolutionary variability of parameters of genome size and structurally functional activity of plants in angiosperm taxa among life forms, are analysed. It is shown that, in the Cretaceous-Cenozoic era, the nuclear genome of the plants tended to increase.
arxiv  

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