Social media (e.g. Facebook, Twitter, Google+) and information and communication technologies (ICT) more generally has altered human interaction. This technology provides tools for instantaneous communication and facilitates social organization. The participants in the uprisings of the Arab Spring used cell phones, text messages, Twitter and Facebook to circumvent and, in Tunisia and Egypt, top...

Branching morphogenesis of epithelia is an important mechanism in mammalian development. The last decade has seen the identification of many signalling pathways and intracellular mechanisms that control epithelial branching. Tissue-level mechanisms that space new branches out have, however, remained an unsolved problem. A recent publication by Nelson et al.1 suggests--if extrapolation from thei...

According to the French-Jewish thinker Levinas (1905–1995), ethics begins with the appearing of the other person, or, as he calls it in his first major work, Totality and Infinity (1961), with his or her “face.” Let us follow Levinas in his attempt to describe this central ethical phenomenon. In this way, we will be led to pay special attention to the problem of violence, hate, and murder, sinc...

Twitter is the largest and most popular micro-blogging website on Internet. Due to low publication barrier, anonymity and wide penetration, Twitter has become an easy target or platform for extremists to disseminate their ideologies and opinions by posting hate and extremism promoting tweets. Millions of tweets are posted on Twitter everyday and it is practically impossible for Twitter moderato...

After the fall of the Berlin Wall a common political and economic consensus emerged, not only in the West but to a considerable extent around the world. Markets and democracy, working hand in hand, would transform the world into a community of modernized, peace-loving nations. In the process, ethnic hatred, extremist fundamentalism, and other “backward” aspects of underdevelopment would be swep...

This paper contains the motivation for the study of critical surfaces in [2]. In that paper, the only justification given for the definition of this new class of surfaces is the strength of the results. However, when viewed as the topological analogue to index 2 minimal surfaces, critical surfaces become quite natural.