Unlike neatly defined science problems, which amaze more by their petabyte scale than their inherent complexity, virtual organisations are noteworthy because of their constantly shifting landscape of data and computer resources, and the authentication on which they rely.

ECONOMIST: REPORT: COMPUTER NETWORKS: Computing power on tap | The

Apple products are not defined merely by the problems they solve or the needs they satisfy.

FORBES: We Are All Macs Now

To get those results, however, Wolfe defined "serious heart problems" much more broadly than others--including Topol--have in the past.

FORBES: The Celebrex Safety Mirage

In Japan today all the problems are coming from defined-benefit pledges that cannot be met.

ECONOMIST: Snares and delusions | The

It is relatively straightforward to generate a simple list of problems that can be reliably and validly defined.

BBC: 'Grief and anxiety are not mental illnesses'

Swooning stockmarkets are a particular headache for British fund managers, who have had too much invested in equities for too long, which is where many of their recent problems arise, and why almost every defined-benefit pension plan is now in trouble.

ECONOMIST: Financial services

They met Wall Street's expectations and were defined by weakness in its financial arm, which has been hit by problems globally and in the credit markets.

FORBES: Magazine Article

Through my search for high quality advisors in the San Francisco Bay Area, I find a lack of a well defined philosophy or a reliance on rhetoric to often be at the core of advisor performance problems.

FORBES: 4 Tips On Investing Like A Pro

Attaching rights to carbon in standing forest, while easier to define, will run into similar problems in places where ownership of forestland and forest services are weak and ill-defined.

ECONOMIST: Letters