We have demonstrated a rapid and facile synthetic method to prepare N-doped Cdots that has excitation independent-emission in yellow-orange region. The Cdots showed solvatochromic behavior in different solvents due to change in solvent polarity illustrating n → π* transition (edge band).

Bangladesh, a test case of disaster management, has been continuously internalizing lessons learned by the people, the bureaucracy and non-governmental organizations (NGOs), after successfully responding to major natural disasters, particularly floods. The unprecedented flood of 1988 was a great educator to almost all stakeholders in Bangladesh. Since then, it has improved its capacity to cope with disasters despite some failures in its management of the macro-economy and governance. Credit goes mostly to the ordinary people whose resilience and creativity during and after disasters have been quite heroic. This paper makes an attempt at documenting peoples' perception and response to major floods at different stages of the crisis. An illustrative plan for coping with flood disasters encompassing these stages has also been designed and outlined in this paper.We normally recognize English-educated elites as our own people. We never can think of the fact that we are nowhere unless we take the ordinary people as our parts and parcels. We are creating a formidable gap between us and the mass. We have always kept them outside the domain of our discourse (Tagore, 1986: 629).

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Thunderstorm and lightning are the burning issues in present. Raising temperature badly affects on the environmental balance. We have collected data and studied the temperature variation and the temperature effect on the environment and on the people of Rangpur (divisional city of Bangladesh) region. Increase of monthly maximum temperature is 0.60°C, monthly minimum temp is 1.39°C and monthly mean temperature of Bangladesh is 0.79°C per 100 years [1] where in last 29 years the temperature of Rangpur station is increased almost 1.2°C. [2] Thunderstorm and lightning occur for this increased temperature. We also analyzed the number of occurrences of thunderstorm in last ten years. We tried to find out some way to reduce the temperature increase and to safe the people. We constructed earthen in five multi-stored buildings and observed the lightening effect on and around of these buildings in last ten years.