Electric scooters have recently become the most popular means of transport chosen to move around urban agglomerations. It is estimated that by end 2024, number on roads world will increase about 600% compared 2019. Easy access rental and low purchase price significantly convince many people use this form transport. This review article aims show what a serious health risk scooter can be. The iss...

We propose an authentication scheme where forgery (a.k.a. impersonation) seems infeasible without finding the prover’s long-term private key. The latter is equivalent to solving the conjugacy search problem in the platform (noncommutative) semigroup, i.e., to recovering X from X−1AX and A. The platform semigroup that we suggest here is the semigroup of n×n matrices over truncated multivariable ...

Local sourcing from indigenous firms by multinational enterprises (MNEs) is an important channel through which the former may benefit from the positive externalities generated by the latter. Employing a special survey data set covering 493 multinational subsidiaries in China for the period 1999-2005, this paper investigates the determinants of local sourcing. It is found that the extent to whic...

• Recent empirical studies suggest that, in the best cases, between a fifth and one-third of total tourist turnover in the destination is captured by the ‘poor’. • Tourism can have important pro-poor impacts and these can be strengthened by deliberate public policy interventions. • Tourism can affect the poor via three, quite different pathways. But there is not a single destination where pover...