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This may be particularly so among reporters who know families within a limited context such as school , day care , or healthcare settings . In fourth year , students undertake further units that draw together a wide range of fundamental knowledge in a mechatronics context such as robotics . This request is presumed to be made in a context such that the AS will not challenge it - - i.e ., the AS will consider the sender of the message to be authenticated . It is important to learn outside the classroom and to see art in public contexts such as museums , galleries and commercial realms . These experiences may involve extended periods in paid work but may also be unpaid internships in community organizations , or they may involve other contexts such as museums that provide learning opportunities outside the classroom . But sounds in the real world occur in context such as shown in the figure above ; a news broadcast is delivered against a background of screams , gunshots and crowd noise . Substantive Focus : A issue may have an emphasis on a specific area of evaluation within a broad context such as health , education , criminal justice , policy analysis , or mental health . The discussions may become especially specific when the problems considered arise in special contexts such as the responsibility peculiar to a given profession . As hardware became cheap and ubiquitous , virtual machines became less common , although they remain in use in specialized contexts such as fault tolerance [ 7 ] , and safe environments for untrusted applications [ 25 ] . The three definitional levels appear to form a natural mechanism for describing parallel systems , as evidenced by their use in other contexts such as the XYZ levels of Phase Abstractions [ 42 ] and the LaRCS specification language [ 31 ] . However , we remain convinced of the need for us better to understand the essence of what would constitute a comprehensive response in a context such as ours which is characterised by the high levels of poverty and disease to which I have referred .