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spec: A witness may be required to attend an examination only in the county wherein he resides or is employed , or transacts his business in person , or is served with a subpena , or within forty miles of the place of service . Occasionally the new heart may have an abnormally slow rhythm , and a pacemaker may be required . With notable exceptions , the left and the right have tended to espouse a " hemiplegic " notion of human rights ( to borrow French writer Jean-Francois Revel ' s apt adjective ) . However , women are not the only ones who are dissatisfied with the way tenure systems operate . On the basis of these reports , a driver may be required to re-take the driver licensing tests ( vision , knowledge and drive ) and demonstrate their ability to safely operate a motor vehicle . One central challenge in all areas of perception is to increase the range of signals that can be interpreted , for example , understanding unrestricted outdoor scenes as opposed to known industrial parts , or naturally occurring speech as opposed to read speech . Factors that stimulate stem cells to relocate to sites of injury or damage and direct differentiate into specific cell types ; manipulation of adult stem cells to enhance their proliferation so that sufficient tissue for transplant can be produced ; manipulation to overcome immune rejection Approaches to utilisation of stem cells in drug targeting etc. Novel means of identifying drug targets using stem cells , and of using stem cells in gene therapy Work with mammalian or any other relevant model system is included in this initiative . Location changes will be handled on a case by case basis : a form may be required to complete the location change . A candidate for a degree may be required to make a satisfactory standing on a departmental comprehensive examination , or write an acceptable essay on some aspect of his / her major subject . Nay , more than this : with passions aroused to fury , they engaged in mutual conflicts , so frequent that their lives were passed as it were in uninterrupted warfare .