We study the effect of technological knowledge on per-capita income and population in a Malthusian economy. Airy differential equations describe the evolution of knowledge. Consequently, the impact of technological knowledge on aggregate output is feeble before and strong after the Industrial Revolution. The economy exposed to Airy growth of knowledge evolves from a Malthusian regime into a Pos...

Initiating flight is challenging, and considerable effort has focused on understanding the energetics and aerodynamics of take-off for both machines and animals. For animal flight, the available evidence suggests that birds maximize their initial flight velocity using leg thrust rather than wing flapping. The smallest birds, hummingbirds (Order Apodiformes), are unique in their ability to perfo...

Anesthesia can be broken down into several components including unconsciousness, disconnection (unawareness of surgery and/or the environment), unresponsiveness, amnesia, and analgesia (absence of pain) [1]. Monitoring these components within clinical settings is challenging, although unresponsiveness, especially in the absence of neuromuscular blockade, or when a limb has been isolated from ge...

“Smart pricing” has been the goal of the networking research community and the telecommunications industry for decades. Yet it has also proved remarkably hard to achieve. This paper presents a brief overview of telecommunications economics and technology, and the major changes that are taking place. Special emphasis is placed on the many popular but harmful notions that continue to lead this in...

1 Department of Construction and Manufacture Engineering, Polytechnic School of Mieres, University of Oviedo, Mieres, 33600 Asturias, Spain 2Department of Exploitation and Prospecting Mines, Mining Engineering School, University of Oviedo, Oviedo, 33004 Asturias, Spain 3 Department of Exploitation Mines, Polytechnic University of Madrid, 28040 Madrid, Spain 4Department of Exploitation and Prosp...

The Journal of Korean Brain Tumor Society was first published on March 30, 2002, and 22 issues have been published until 2012 without delay or interruption. The journal was published twice a year and was a mix of Korean and English languages. When we consider the reality in the field of brain tumor research, it was possible because of a lot of effort and sacrifice of many members of the previou...

Improvement in the professional career development of junior doctors is dependent on the promised expansion of the consultant grade. The government and its advisors should concentrate on achieving this goal before all others.