Spacetime singularities have been discovered which are physically much weaker than those predicted by the classical singularity theorems. Geodesics evolve through them and they only display infinities in the derivatives of their curvature invariants. So far, these singularities have appeared to require rather exotic and unphysical matter for their occurrence. Here we show that a large class of ...

Information and communication technology (ICT) is a principal driver of economic development and social change, worldwide. In many countries, the need for economic and social development is used to justify investments in educational reform and in educational ICT. Yet the connections between national development goals and ICT-based education reform are often more rhetorical than programmatic. Th...

f rom the viewpoint of economic theories, total factor productivity (tfp) is the most important component that leads to economic growth and development. the main purpose of this study was to evaluate the impact of knowledge-based economy on total factor productivity in the member countries of the middle east and north africa (mena) region. for this purpose, the panel data regression analysis ha...

the armenian-turkish conflict except the disagreement between the two countries has also developed in the regional and international levels. it is becoming the conflict of interests and competition of superpowers in regional and international sphere, which has its great influence on the complication of the process of the conflict between the two countries. taking into consideration the disagree...