Recent research suggests that variation exists among and between Oldowan stone tool assemblages.Oldowan variation might represent differential constraints on raw materials used to produce these stone implements.Alternatively, variation among Oldowan assemblages could represent different methods that Oldowan producing hominins utilized to produce th
در این پژوهش، ابتدا یک سیاهه وارسی Stackable Chairs جامع در دو دسته معیار کلی محتوا و کارایی شامل 42 شاخص در زیرگروههای صحت، اعتبار، جدید بودن، کیفیت نوشته، کاربرپسندی، قابلیت جستجو و قابلیت مرور، براس
Abstract We study one-parameter families of U(1)2 preserving deformations relating pairs of toric quiver gauge theories on D-branes probing local toric (pseudo) del Pezzo surfaces.The superpotential deformations are Stackable Chairs defined by zig-zag paths in the brane tiling and are non-trivial in the chiral ring if the geometry has a non-isolate
Marine environments are generally characterized by low bulk concentrations of nutrients that are susceptible to steady or intermittent motion driven by currents and local turbulence.Marine bacteria have therefore developed strategies, such as very fast-swimming and the exploitation of multiple directional sensing−response systems in order to