Space agencies and commercial satellite operators are reluctant to dedicate precious fuel, or reduce the working lifetime of a satellite, to ensure that celestial last rites are performed properly.
Latvian incomes are currently the lowest in the EU, but if the Latvian and the German economies were to go on growing at last year's rates of 8% and 1.6% respectively, then, all other things being equal, Latvian incomes would overtake German ones in 2032 which is to say, within the working lifetime of a young adult.
The economic lifetime is the working lifetime which gains the lowest average cost.
Many, including opposition critics of the federal government, stress the need for further supply-side reforms, including further reductions in business taxation, further reductions of labor costs, the extension of the workweek and the working lifetime, and improvements in education.
Michael D'Emic, from Stony Brook University, New York, and co-workers used the daily layers of dentin, laid down as the dinosaur teeth grew, to determine the working lifetime and replacement rates of these massive herbivores' teeth.
A similar mathematical device is applied (in Appendix A) to reduce from three to two the number of workforce cohorts needed when the length of the safety system's service lifetime is less than the working lifetime.
The case when the safety-system lifetime is greater than the working lifetime is addressed by splitting the workforce into a set of three cohorts, one for existing workers and two for new recruits.
The chief difficulty with actually carrying out such a mission is the need for reaching significant penetration into the interstellar medium (∼1000 Astronomical Units (AU)) within the working lifetime of the initiators (<50 years).
Whereas the previous mathematical technique was able to cater for a nuclear-safety-system lifetime up to the working lifetime of the nuclear-plant workers (typically between 45 and 50 years), the new method extends without limit the range of tractable, safety-system lifetimes.
IBL and TWA were based on blood lead levels obtained over the working lifetime of the participants, thus increasing the likelihood of any causal inferences made.
