Growth of human population shows no signs of stagnation. The only small disturbance is identified as being probably associated with the coinciding impacts of five demographic catastrophes. The concept of the Epoch of Malthusian Stagnation is convincingly contradicted by empirical evidence.

Introduction. This announcement deals with the subject of continuous flows in the Euclidean plane. I t has long been known (cf. [ l]) tha t every closed set in the plane is the invariant set of some continuous flow. In a recent paper [2], this author has shown that the same statement is not true for flows all of whose orbits are closed in the plane. In fact a necessary and sufficient condition ...

Population growth and economic change are tightly bound together. The very high rates of population growth in the poor countries of Africa, Asia, and Latin America complicate the resolution of basic economic problems and make it more difficult to assure an adequate rate of growth of income per capita. Simultaneously, the relative stagnation of per capita incomes, especially in the rural areas o...

We present an alternative model for the formation of fast low-ionization emission regions (FLIERs) in planetary nebulae that is able to account for many of their attendant characteristics and circumvent the problems on the collimation/formation mechanisms found in previous studies. In this model, the section of the stellar wind flowing along the symmetry axis carries less mechanical momentum th...

The drinking water quality changes during the transport through distribution systems. Domestic drinking water systems (DDWSs), which include the plumbing between the water meter and consumer's taps, are the most critical points in which water quality may be affected. In distribution networks, the drinking water temperature and water residence time are regarded as indicators of the drinking wate...

Stagnant atmospheric conditions can lead to hazardous air quality by allowing ozone and particulate matter to accumulate and persist in the near-surface environment. By changing atmospheric circulation and precipitation patterns, global warming could alter the meteorological factors that regulate air stagnation frequency. We analyze the response of the National Climatic Data Center (NCDC) Air S...

This paper surveys the persian monetary crises due to economic sanctions and speculative attacks that leads to high inflation. Economic sanctions are associated with various forms of trade barriers and restriction on financial transactions. Among the most influential sanctions on Iran's oil export and central bank sanctions are noted that their Aims to reduce Iran's oil revenues and Devaluation...

We investigate the stability of steady planar stagnation flows of a dilute polyethylene oxide (PEO) solution using T-shaped microchannels. The precise flow rate control and well-defined geometries achievable with microfluidic fabrication technologies enable us to make detailed observations of the onset of elastically-driven flow asymmetries in steady flows with strong planar elongational charac...