The aim of gutter creation and muscle transposition is to increase blood supply to the diseased bone segment, without the need for microsurgical interventions and secondary reconstructive procedures. Our long-term results show that this technique is efficacious in patients with femoral and tibial involvement.
Abstract-Equation-based optimization using geometric programming (GP) for automated synthesis of analog circuits has recently gained broader adoption. A major outstanding challenge is the inaccuracy resulting from fitting the complex behavior of scaled transistors to posynomial functions. Fitting over a large region can be grossly inaccurate, and in fact, poor posynomial fit can lead to failure to find a true feasible solution. On the other hand, fitting over smaller regions and then selecting the best region, incurs exponential complexity.In this paper, we advance a novel optimization strategy that circumvents these dueling problems in the following manner: by explicitly handling the error of the model in the course of optimization, we find a potentially suboptimal, but feasible solution. This solution subsequently guides a range-refinement process of our transistor models, allowing us to reduce the range of operating conditions and dimensions, and hence obtain far more accurate GP models.The key contribution is in using the available oracle (SPICE simulations) to identify solutions that are feasible with respect to the accurate behavior rather than the fitted model. The key innovation is the explicit link between the fitting error statistics and the rate of the error uncertainty set increase, which we use in a robust optimization formulation to find feasible solutions.We demonstrate the effectiveness of our algorithm on a two benchmarks: a two-stage CMOS operational amplifier and a voltage controlled oscillator designed in TSMC 0.18µm CMOS technology. Our algorithm is able to identify superior solution points producing uniformly better power and area values under gain constraint with improvements of up to 50% in power and 10% in area for the amplifier design. We also demonstrate that when utilizing the models with the same level of modeling error, our method yields solutions that meet the constraints while the violations for the standard method were as high as 45% and larger than 15% for several constraints.
Eurocentrism means seeing the world in Europe’s terms and through European eyes. This may not be unreasonable for Europeans, but there are unforeseen consequences. Eurocentric history implies that a scientific modernity has diffused out from Europe to benefit the rest of the world, through colonies and development aid. It involves the imposition of European norms on places and times where they are often quite inappropriate. In Eurocentrism in European History and Memory, well-known scholars explore and critically analyse manifestations of Eurocentrism in representations of the European past from different disciplines — history, literature, art, memory and cultural policy — as well as from different geographical perspectives. The book investigates the role imaginings of the European past since the eighteenth century played in the construction of a Europeanist worldview and the ways in which ‘Europe’ was constructed in literature and art.
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