The objective of this work is to characterize the nonlinear dependence piezoelectric d15 shear coefficient a composite actuator on static electric field and include effect in finite element (FE) simulations. Levenberg-Marquardt least squares optimization algorithm implemented MATLAB was applied acquire parameters. constant integrated with piezoceramic patches obtained be 732 pC/N at 198 V. expe...

2015 Aim: Bioreactors are an essential component in every biotechnological process. Due to the multitude of different microbial and mammalian organisms used for production of complex products, novel concepts for customized cultivations are necessary. Results: A ceramic capillary-based bioreactor enabling a novel approach for steadystate biofilm cultivation is presented. A model for the determin...

Suppose that independent U 0 1 weights are assigned to the (d2)n2 edges of the complete d-partite graph with n vertices in each of the d = maximal independent sets. Then the expected weight of the minimum-weight perfect d-dimensional matching is at least 3 16n 1− 2/d . We describe a randomized algorithm that finds a perfect d-dimensional matching whose expected weight is at most 5d3n1− 2/d + d1...

A simple model is constructed for the SLC positron system to describe the intensity variations induced by beam loxling ill i,lle linac. It is found that the system caa he described by t,hc well I~IOIVII logist,ic equation. This allows us to use results from the st,ahility anal~.sis to chxacterize the positron system, to plxe tolerances on fluctuatjiolls. at~tl to slow \xiations on the scavenger...

We document that government spending multipliers depend on the population age structure. Using variation in military and birth rates across US states, we show local fiscal multiplier is 1.5 increases with share of young people, implying 1.1–1.9 interquartile range. A parsimonious life cycle open economy New Keynesian model credit market imperfections age-specific differences labor supply demand...

A diverse experimental program for the study of the photoproduction of mesons off nuclei has been carried out and is still running at the Mainz MAMI and Bonn ELSA electron accelerators with the TAPS, Crystal Barrel, and Crystal Ball calorimeters. It is motivated as a detailed study of the in-medium properties of hadrons and the meson nucleus interactions. Typical examples for the in-medium beha...

به علت تغییرات حجم ناشی از خطای ساخت، فرکانس کاواک‌های شتاب‌دهی در شتاب‌دهنده‌های خطی الکترون تغییر می‌کند. نتیجه تنظیم فرکانسی کاواک‌ها یکی مراحل مهم تست سرد است که باید الزامات آن طراحی لحاظ شود. پروژه ساخت ساختار موج‌ایستا برای شتاب­دهنده با دو انرژی، پس طراحی، یک آلومینیمی (شامل نیم کاواک و تزویج) ساخته شد. این جبران پیچ‌های استفاده پیچ‌ها جزیی کاواک‌ها، آن‌ها را می‌دهند. مقاله محاسبات شبیه...