Results 61 to 70 of about 7,369,874 (310)
Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors
Population Ecology, EarlyView.Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley +1 more source
One helpful property of functions generating P\'olya frequency sequences
, 2015 In this work we study the solutions of the equation $z^pR(z^k)=\alpha$ with nonzero complex $\alpha$, integer $p,k$ and $R(z)$ generating a (possibly doubly infinite) totally positive sequence. It is shown that the zeros of $z^pR(z^k)-\alpha$ are simple (
Dyachenko, Alexander
core +1 more source
Liver function from Y to Z [PDF]
Journal of Clinical Investigation, 2012 In the 1960s, my lab was interested in understanding how bilirubin and other organic anions are transferred from the plasma through the liver cell and into the bile. We performed gel filtration of liver supernatants and identified two protein fractions, designated Y and Z, which bound organic anions including bilirubin, and thus we proposed that they ...
openaire +3 more sources
Population Ecology, EarlyView.Bear management changes management actions according to the horizontal axis of the population size and the vertical axis of the number of nuisance bears. Aiming for the target population size of Ntar, Actions I and II protect the bears, and Action IV reduces the population.
Hiroyuki Matsuda +5 more
wiley +1 more source
The use of singular functions for the approximate conformal mapping of doubly-connected domains [PDF]
, 1982 Let f be the function which maps conformally a given doubly- connected domain onto a circular annulus. We consider the use of two closely related methods for determining approximations to f of the form fn (z) = z exp, ⎪⎩⎪⎨⎧⎭⎬⎫Σ−(z)uan1jjj where {uj} is
Kokkinos, CA, Papamichael, N
core
Journal of Inequalities and Applications, 2019 In this paper, we provide an estimate for approximating the generalized-Euler-constant function γ(z)=∑k=1∞zk−1(1k−lnk+1k) $\gamma (z)=\sum_{k=1}^{\infty }z ^{k-1} (\frac{1}{k}-\ln \frac{k+1}{k} )$ by its partial sum γN−1(z) $\gamma _{N-1}(z)$ when ...
Aimin Xu
doaj +1 more source
On the stationary points of Hardy's function Z(t) [PDF]
Acta Arithmetica, 2004 Hardy's function \(Z(t)\), sometimes referred to as the signed modulus, is defined by \[ Z(t) = \left(\pi^ {-it}{\Gamma({1\over 4}+{1\over 2}it)\over\Gamma({1\over 4}-{1\over 2}it)}\right)^ {{1\over 2}}\zeta({1\over 2}+it). \] Let \[ {\mathcal Z}(s) = \left(\pi^ {{1\over 2}-s}{\Gamma({s\over 2})\over\Gamma({1-s\over 2})}\right)^ {{1\over 2}}\zeta(s), \]
openaire +2 more sources
The bright end of the luminosity function atz ~ 9 [PDF]
Astronomy & Astrophysics, 2012 4 pages, 2 figures, accepted for publication in A&A ...
Francoise Combes +14 more
openaire +3 more sources
Population Ecology, EarlyView.Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi +3 more
wiley +1 more source
On Partial-Function Application in Z [PDF]
Electronic Workshops in Computing, 1998 We discuss the application of partial functions to elements outside their domain in the context of the Z language and CADiZ tool. We illustrate some surprising results that can arise, and show that they may be readily justified, but also show that undesirable results can arise that are less readily resolved.
openaire +2 more sources