It should be noted that during the process of sustained entrepreneurship, successful pioneers provided a wealth of qualitative research data for this study, but behind them are countless of quiet people who failed but made difficult explorations and accumulated rational experiences.
In April 2010, President Obama called upon NASA to send a human mission to an asteroid by 2025 as a steppingstone for the much more difficult human exploration of Mars.
Such a mission would serve as a first step beyond low Earth orbit and prove out operational spaceflight capabilities such as life support, communication, high speed re-entry, and radiation protection prior to more difficult human exploration missions.
Assuming BG delivers, the deal solves both these problems, and strengthens Shell's cashflow.The fall in the oil price has highlighted the weaknesses of energy companies that place big, long-term bets on difficult production and exploration projects.
The matter of planning how to pursue such a difficult and unprecedented exploration opportunity is therefore historic.
"It's a brilliant observation, particularly in a heavily forested area that's difficult to do exploration in," says Karin Olson Hoal, a diamond geologist at the Colorado School of Mines in Golden.
Reasons for heterogeneity were explored where possible, although limitations in reporting and small numbers of included studies made detailed exploration difficult.
However, a more comprehensive mathematical representation of the biological processes involved comes at the expense of an increased number of free parameters, making more difficult an extensive exploration of the parameter space.
A Cytoscape plugin, BioNetBuilder (Avila-Campillo et al., 2007), can also be used to import KEGG data into Cytoscape but (i) it merges all KEGG interactions into a single network, making its exploration difficult, (ii) it does not provide a simple way to integrate expression data and (iii) it does not produce a visualisation highlighting gene expression changes.
It's tightly controlled entertainment– does that destroy any chance of serious exploration of difficult issues?
