Multimaterial 3D printing using microfluidic printheads specifically designed for seamless switching between two visco-elastic materials "on-the-fly" during fabrication is demonstrated. This approach opens new avenues for the digital assembly of functional matter with controlled compositional and property gradients at the microscale.

3D printing is a relatively new, rapidly expanding method of manufacturing that found numerous applications in healthcare, automotive, aerospace and defense industries and in many other areas. In this review, applications in medicine that are revolutionizing the way surgeries are carried out, disrupting prosthesis and implant markets as well as dentistry will be presented. The relatively new fi...

The hybrid ARIMA-SVMs prediction models have been established recently, which take advantage of the unique strength of ARIMA and SVMs models in linear and nonlinear modeling, respectively. Built upon this hybrid ARIMA-SVMs models alike, this study goes further to extend them into the case of multistep-ahead prediction for air passengers traffic with the two most commonly used multistep-ahead pr...

While the purpose of conventional proof calculi is to axiomatise the set of valid sentences of a logic, refutation systems axiomatise the invalid sentences. Such systems are relevant not only for proof-theoretic reasons but also for realising deductive systems for nonmonotonic logics. We introduce Gentzen-type refutation systems for two basic three-valued logics and we discuss an application of...

In this paper I explore Kant’s critical discussions of the topic of miracles (including the important but neglected fragment from the 1780s called “On Miracles”) in an effort to answer the question in the title. Along the way I discuss some of the different kinds of “laws” in Kant’s system, and also the argument for his claim that, even if empirical miracles do occur, we will never be in a good...

The existence of power law distributions (also known as heavy-tailed distributions) in various natural and man-made scenarios has been demonstrated empirically over the years [6], and attracted a great deal of interest, resulting in models that would naturally predict such distributions. The areas in which power laws have been observed are very diverse, as evidenced by the following, not nearly...