Rao reported that the anatase-to-rutile transition of a powder prepared by oxidizing pure titanium metal started around 610 (10). Rao showed that impurity and particle size played an important role in the transition (10). The presence of impurity and larger particle size increased the transition temperature.
A call centre or call center is a centralised office used for receiving or transmitting a large volume of requests by telephone. An inbound call centre is operated by a company to administer incoming product support or information inquiries from consumers.Outbound call centers are operated for telemarketing, solicitation of charitable or political donations, debt collection and market research.n virtual call centre model, the call centre's operator pays a monthly or annual fee to a vendor that hosts the call centre telephony equipment in their own data centre. In this model, the operator does not own, operate or host the equipment that the call centre runs on.
A conventional Centrex system is a physical and logical partition of a telco Central Office, which is a specialized digital computer system that incorporates a switching matrix for connecting voice calls on a circuit-switched basis.