Density dependence triggers runaway selection of reduced senescence [PDF]
, 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
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Clade density and the evolution of diversity-dependent diversification
Nature Communications, 2023 The assumption of an ecological limit to the number of species in a given region is frequently invoked in evolutionary studies, yet its empirical basis is remarkably meager. We explore this assumption by integrating data on geographical distributions and
Marcio R. Pie +2 more
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Fixed Points and Stability of Density Evolution [PDF]
Communications in Information and Systems, 2004 Density evolution is a dynamic system in a space of probability distributions repre- senting the progress of iterative decoders in the infinite block length limit. In this paper we establish some basic results concering this process. In particular we show that the decoding threshold is equivalent to to appearance of non-trivial fixed point solutions to
Richardson, Tom, Urbanke, Rudiger
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Experimental and numerical study on homogenisation of BCV bentonite using dual density samples [PDF]
E3S Web of Conferences, 2023 Homogenisation of bentonite materials is an essential feature for its sealing function in radioactive waste repositories. Presented study is focused on the laboratory investigation of the homogenisation of Czech BCV bentonite (Ca/Mg type).
Najser Jan, Mašín David
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Density evolution for SUDOKU codes on the erasure channel [PDF]
2014 8th International Symposium on Turbo Codes and Iterative Information Processing (ISTC), 2014 5 pages, accepted for publication at the 8th International Symposium on Turbo Codes and Iterative Processing, August ...
Caroline Atkins, Jossy Sayir
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Finite Length Analysis of Low-Density Parity-Check Codes on Impulsive Noise Channels
IEEE Access, 2016 Low-density parity-check (LDPC) codes with very long block lengths are well known for their powerful error correction, but it is not always desirable to employ long codes in communication systems, where latency is a serious issue, such as voice and video
Zhen Mei +3 more
doaj +1 more source
Anharmonic evolution of the cosmic axion density spectrum [PDF]
Physical Review D, 1994 We present analytic solutions to the spatially homogeneous axion field equation, using a model potential which strongly resembles the standard anharmonic $(1-\cos Nθ)$ potential, but contains only a piece-wise second order term. Our exactly soluble model for $θ(t)$ spans the entire range $[-π/N,π/N]$.
Strobl, K., Weiler, T. J.
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Experimental evidence for density dependent reproduction in a cooperatively breeding passerine [PDF]
, 2009 Temporal variation in survival, fecundity, and dispersal rates is associated with density-dependent and density-independent processes. Stable natural populations are expected to be regulated by density-dependent factors.
Tinbergen, Joost M. +18 more
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EVOLUTION OF DENSITY PERTURBATIONS IN LARGE VOID UNIVERSE [PDF]
The Thirteenth Marcel Grossmann Meeting, 2012 23 pages, 8 figures; added references for section ...
Nishikawa, Ryusuke +2 more
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Intercomparison of snow density measurements: bias, precision, and vertical resolution [PDF]
, 2016 Density is a fundamental property of porous media such as snow. A wide range of snow properties and physical processes are linked to density, but few studies have addressed the uncertainty in snow density measurements.
C. Fierz +7 more
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