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Cari koleksi dengan cepat sesuai kebutuhan Anda.Understanding how cultural values influence undergraduate students’ science research experiences and career interest is important in efforts to broaden participation and to diversify the biomedical research workforce. The results from our prospective longitudinal study demonstrated that underrepresented minority student (URM) research assistants who see the altruistic value of conducting biom…
Ecologists urgently need a better ability to predict how environmental change affects biodiversity. We examine individual-based ecology (IBE), a research paradigm that promises better a predictive ability by using individual-based models (IBMs) to represent ecological dynamics as arising from how individuals interact with their environment and with each other. A key advantage of IBMs is that th…
Cells are the smallest known pieces of biology that are capable of independent reproduction and are therefore the simplest units that can evolve by conventional natural selection. This is problematic because even the simplest self-replicating cell-like entities seem to be too complicated to arise without the guiding hand of selection. To solve this conundrum, I argue that selection began before…
We prove that there are no bounded domains with smooth boundaries in even-dimensional Euclidean spaces, such that the volumes cut off from them by affine hyperplanes depend algebraically on these hyperplanes. For convex ovals in R2, this is Lemma XXVIII from Newton’s ‘Philosophiae naturalis principia mathematica’.
Results are obtained for two minimization problems: Ik(c) = inf{λk(Ω) : Ω open, convex in Rm, T (Ω) = c} and Jk(c) = inf{λk(Ω) : Ω quasi-open in Rm, |Ω| <= 1, P(Ω) <= c}, where c > 0, λk(Ω) is the kth eigenvalue of the Dirichlet Laplacian acting in L2(Ω), |Ω| denotes the Lebesgue measure of Ω, P(Ω) denotes the perime…