pportunities.Models of supervision[සංස්කරණය]At some universities, there may be training for those wishing to supervise Ph.D. studies. There is now a lot of literature published for academics who wish to do this, such as Delamont, Atkinson and Parry (1997). Indeed, Dinham and Scott (2001) have argued that the worldwide growth in research students has been matched by increase in a number of what they term "how-to" texts for both students and supervisors, citing examples such as Pugh and Phillips (1987). These authors report empirical data on the benefits that Ph.D. students may gain if they publish their work, and note that Ph.D. students are more likely to do this with adequate encouragement from their supervisors. Wisker (2005) has noticed how research into this field has distinguished between two models of supervision:The technical-rationality model of supervision, emphasising technique;The negotiated order model, being less mechanistic and emphasising fluid and dynamic change i