Results 21 to 30 of about 6,775 (249)

Construction of Three Branches Fractal Trees Using Iterated Function System

open access: yesJurnal Ilmu Dasar, 2022
There are two types of fractal: natural fractals and fractals set. The examples of natural fractals are trees, leaves, ferns, mountain, and coastlines. One of the examples of fractals set is Pythagorean tree.
Kosala Dwidja Purnomo   +2 more
doaj   +1 more source

Living with endangered species: Collection of tree ferns in the forest-reserve of Marilog district, Southern Philippines

open access: yesTrees, Forests and People, 2020
Scaly tree ferns are locally known as Anonotong in Southern Philippines and considered as endangered species. Its collection is prohibited, but along the highway of Marilog District, Davao City, its trading is very obvious. Hence, the study was conducted
Raquelyn J. Dadang   +4 more
doaj   +1 more source

Species richness of Cyatheales in the upper Santo Domingo Canyon, Antioquia, Colombia [PDF]

open access: yesCheck List
The Regional Protective Forest Reserve of the Canyons of the Melcocho and Santo Domingo Rivers in eastern Antioquia, Colombia, spans 26,533 ha with elevations from 706 to 2,937 m above sea level.
Andrés Montoya-López, Marcus Lehnert
doaj   +3 more sources

Geoconservation and Geotourism on Fossil Forest of the Aragoncillo Range, Molina-Alto Tajo UNESCO Global Geopark (central Spain) [PDF]

open access: yesGeoconservation Research, 2021
The Fossil Forest of the Aragoncillo Range is one of several paleontological sites of exceptional scientific value in the Sierra de Selas (Province of Guadalajara, central Spain).
Yolanda Sanchez Moya   +3 more
doaj   +1 more source

rFerns: An Implementation of the Random Ferns Method for General-Purpose Machine Learning

open access: yesJournal of Statistical Software, 2014
Random ferns is a very simple yet powerful classification method originally introduced for specific computer vision tasks. In this paper, I show that this algorithm may be considered as a constrained decision tree ensemble and use this interpretation to ...
Miron B. Kursa
doaj   +1 more source

Distribution, habitat preferences and population sizes of two threatened tree ferns, Cyathea cunninghamii and Cyathea x marcescens, in south-eastern Australia

open access: yes, 2013
The distribution, population sizes and habitat preferences of the rare tree ferns Cyathea cunninghamii Hook.f. (Slender Tree Fern) and F1 hybrid Cyathea x marcescens N.A.Wakef.
Peacock, Ross J.   +3 more
core   +1 more source

Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns

open access: yes, 2016
publisher: Elsevier articletitle: Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns journaltitle: Perspectives in Plant Ecology, Evolution and Systematics articlelink: http://dx.doi.org/10.1016/j.ppees.2016.01.003 ...
Heinrichs, Jochen   +4 more
core   +1 more source

Distribution of Ploidy Level on Adiantumdiaphanum Blume at Various Altitudes in Probolinggo

open access: yesBiosfer: Jurnal Tadris Biologi, 2019
Ferns are indicated could become polyploid organism due to altitude effect. In this research, the distribution of ploidy level on AdiantumdiaphanumBlume based on difference altitude was studied.
Ade Rezi Amelia, Ahmad Fauzi
doaj   +1 more source

Revisiting ancient polyploidy in leptosporangiate ferns [PDF]

open access: yes, 2022
Ferns, and particularly homosporous ferns, have long been assumed to have experienced recurrent whole-genome duplication (WGD) events because of their substantially large genome sizes, surprisingly high chromosome numbers, and high degrees of polyploidy ...
Huang, Sanwen   +5 more
core   +1 more source

Geochemistry, petrology, and palynology of the Princess No. 3 coal, Greenup County, Kentucky

open access: yesInternational Journal of Coal Science & Technology, 2020
The high volatile C bituminous-rank, Bolsovian-age Princess No. 3 coal, a correlative of the heavily-mined Hazard No. 7 coal and the Peach Orchard and Coalburg Lower Split coals, was investigated three sites at a mine in Greenup County, Kentucky.
Madison M. Hood   +3 more
doaj   +1 more source

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