Results 41 to 50 of about 8,265,428 (297)

Improved Density Peaks Clustering Based on Natural Neighbor Expanded Group

open access: yesComplexity, 2020
Density peaks clustering (DPC) is an advanced clustering technique due to its multiple advantages of efficiently determining cluster centers, fewer arguments, no iterations, no border noise, etc.
Lin Ding, Weihong Xu, Yuantao Chen
doaj   +1 more source

Living on the edge : Roe deer (Capreolus capreolus) density in the margins of Its geographical range [PDF]

open access: yes, 2014
Over the last decades roe deer (Capreolus capreolus) populations have increased in number and distribution throughout Europe. Such increases have profound impacts on ecosystems, both positive and negative.
Marques Tiago A.   +23 more
core   +1 more source

Pengaruh Perbedaan Padat Penampungan Dan Dosis Pakan Alami Terhadap Pertumbuhan Larva Udang Windu (Penaeus monodon Fab.)
[ The Effect Of Density And Natural Feed Dozes Growth Of Giant Shrimp Larvae (Penaeus monodon Fab.) ]

open access: yesJurnal Ilmiah Perikanan dan Kelautan, 2011
The growth of shrimp larvae are depend on several factors, such as natural feed. These natural feed must consist protein, carbohydrate and lipid to support survival rate. The best growth of post larvae of giant shrimp are found by Artemia sp.
Hendri Gustrifandi
doaj   +1 more source

Cross-Linked Density Determination of Natural Rubber Compounds by Different Analytical Techniques

open access: yesMaterials Research, 2021
This paper investigated the formation of crosslinks in natural rubber compounds in the vulcanization systems: conventional (CV), semi-efficient (SEV), and efficient (EV), processed with three types of accelerators: MBTS (dibenzothiazole disulfide), TMTD (
Carlos Toshiyuki Hiranobe   +7 more
doaj   +1 more source

Density dependence triggers runaway selection of reduced senescence [PDF]

open access: yes, 2007
In the presence of exogenous mortality risks, future reproduction by an individual is worth less than present reproduction to its fitness. Senescent aging thus results inevitably from transferring net fertility into younger ages.
Doncaster, C. Patrick   +7 more
core   +2 more sources

A soft computing approach for prediction of P- ρ-T behavior of natural gas using adaptive neuro-fuzzy inference system

open access: yesPetroleum, 2017
Density is an important property of natural gas required for the design of gas processing and reservoir simulation. Due to expensive measurement of density, industry tends to predict gas density through an EOS.
Amir Hossein Saeedi Dehaghani   +1 more
doaj   +1 more source

Natural density of rectangular unimodular integer matrices

open access: yesLinear Algebra and its Applications, 2011
An integer matrix of size k×n, k≤n, is called unimodular if it can be extended to an n×n invertible matrix. The natural density of unimodular k×n matrices, which may be explained as the “probability" of a random k×n integer matrix to be unimodular, is determined in this paper using the Riemann's zeta function.
Maze, G, Rosenthal, J, Wagner, U
openaire   +3 more sources

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Large plants enhance aboveground biomass in arid natural forest and plantation along differential abiotic and biotic conditions

open access: yesFrontiers in Plant Science, 2022
Big-sized trees, species diversity, and stand density affect aboveground biomass in natural tropical and temperate forests. However, these relationships are unclear in arid natural forests and plantations.
Bai-Yu Yang   +10 more
doaj   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

open access: yesFEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure   +3 more
wiley   +1 more source

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