نتایج جستجو برای: fourth
تعداد نتایج: 64886 فیلتر نتایج به سال:
In this paper we present an explicit fourth-order method for the integration of Hamilton’s Equations. This method preserves the property that the time evolution of such a system yields a canonical transformation from the initial conditions to the final state. That is, the integration step is an explicit symplectic map. Although the result is first derived for a specific type of Hamiltonian, it ...
Starting in the early 1990s, three generations of ebooks have quietly paved the way for a fourth generation, one that emphasizes the social side of reading. The first generation of ebooks focused on multimedia and the direct advantages of reading on a computer. The second generation explored the mobile form-factor of reading hardware. The third generation—the first to gain widespread adoption—e...
In this article, the author uses accident data readily available from the United States Bureau of Labor Statistics to create a New Incident Pyramid, a modern day equivalent of Heinrich’s Triangle. This historical data is then combined with generally accepted statistical methods to show that the relationship between incident types first envisioned by Herbert William Heinrich in 1931 has a fourth...
VEGF-A and VEGF receptors, Flt-1/FLT-1 (VEGFR-1) and Flk-1/KDR (VEGFR-2), are key regulators of tumor angiogenesis and tumor growth. The purpose of this study was to determine the anti-angiogenic and anti-tumor efficacy of vascular-targeting fusion toxin VEGF121/rGel in an orthotopic glioblastoma mouse model using non-invasive in vivo bioluminescence imaging (BLI), magnetic resonance imaging (M...
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