in spite of the fact that cementitious and concrete materials are mainly used on a large scale and inhuge quantities for roads, dams, bridges and building constructions, the mechanical behavior of thesematerials depends to a great extend on structural elements and phenomena which are effective on amicro and nanoscale. although this is well known by researchers, material producers and engineersf...

In this article, we reflect on the role that leadership has played in response to global Covid-19 crisis. We discuss two major ‘fault lines' of leadership: narcissism, and ideological rigidity. A fault line is a problem may not be obvious under normal circumstances but could cause fail stakeholders society at large defining moment such as pandemic. Using case examples from political leaders ela...