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I have seen how easy it is for nuclear contamination to occur, and how hard it is to clean it up…. Do nations possess nuclear, chemical and biological weapons because of fear of attack from some other nation, or is it mainly because without them the stronger cannot otherwise exploit the weaker? Andreas Toupadakis, quoted by Institute for Public Accuracy  Press Release , February 23, 2000. (Andreas Toupadakis had recently resigned from the  Stockpile Stewardship  program on nuclear weapons and worked at Los Alamos National Laboratory. He was critical of US Nuclear policy.) As the more powerful countries show less commitment to reducing their own arms substantially and continue to pursue their own  national interests , they affect many others around the world. This has led to an increase in resentment against them. One option for nations that feel threatened has been to improve their defensive capabilities and increase arms purchases and spending. Neighborin...

Almost half the world — over three billion people — live on less than $2.50 a day. At least 80% of humanity lives on less than $10 a day. Source 1 More than 80 percent of the world’s population lives in countries where income differentials are widening. Source 2 The poorest 40 percent of the world’s population accounts for 5 percent of global income. The richest 20 percent accounts for three-quarters of world income. Source 3 According to UNICEF, 22,000 children die each day due to poverty. And they  die quietly in some of the poorest villages on earth, far removed from the scrutiny and the conscience of the world. Being meek and weak in life makes these dying multitudes even more invisible in death. Source 4 Around 27-28 percent of all children in developing countries are estimated to be underweight or stunted. The two regions that account for the bulk of the deficit are South Asia and sub-Saharan Africa. If current trends continue, the Millennium Development...

Wireless Sensor Networks (WSN) can be defined as a self configured network formed using a large numbers of sensor nodes distributed over a geographical area with either predefined location or randomly deployed. Individual sensor nodes posses limited processing, communicating and energy recourses. These sensor nodes can sense, measure, and gather information from the vicinity, based on the local pre defined decision process, can transmit the sensed information (data) to the user or information sink. Communication of sensed data from the sensor nodes to information sink happens to be the main cause of energy depletion in sensor nodes. In order to extend the active life of WSN, it is required to process data locally and send the processed information to sink node. One of possible solution for optimal use of available energy is by using cluster based routing protocols