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Thermocapillary-driven fluid flow within microchannels
(2018)arXivSurface tension gradients induce Marangoni flow, which may be exploited for fluid transport. At the micrometer scale, these surface-driven flows can be more significant than those driven by pressure. By introducing fluid-fluid interfaces on the walls of microfluidic channels, we use surface tension gradients to drive bulk fluid flows. The gradients are specifically induced through thermal energy, exploiting the temperature dependence of ...Working Paper -
Laplacian dynamics on cographs
(2018)arXivIn this paper, we examine the controllability of Laplacian dynamic networks on cographs. Cographs appear in modeling a wide range of networks and include as special instances, the threshold graphs. In this work, we present necessary and sufficient conditions for the controllability of cographs, and provide an efficient method for selecting a minimal set of input nodes from which the network is controllable. In particular, we define a ...Working Paper -
Lack of evidence that ursodeoxycholic acids effects on the gut microbiome influence colorectal adenoma risk
(2017)bioRxivObjective We previously reported that Ursodeoxycholic acid (UDCA), a therapeutic bile acid, reduces risk for advanced colorectal adenoma in men but not women. Interactions between the gut microbiome and fecal bile acid composition as a factor in colon cancer neoplasia have been postulated but evidence is limited to small cohorts and animal studies. Design Using banked stool samples collected as part of a phase III randomized clinical ...Working Paper -
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Electricity Planning for Sustainable Development in the MENA Region
(2017)MENA-SELECT Working PaperWorking Paper