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At all airports the use of a traffic pattern (often called a traffic circuit outside the U.S.) is possible. They may help to assure smooth traffic flow between departing and arriving aircraft. There is no technical need within modern aviation for performing this pattern, provided there is no queue. And due to the so-called SLOT-times, the overall traffic planning tend to assure landing queues are avoided. If for instance an aircraft approaches runway 17 (which has a heading of approx. 170 degrees) from the north (coming from 360/0 degrees heading towards 180 degrees), the aircraft will land as fast as possible by just turning 10 degrees and follow the glidepath, without orbit the runway for visual reasons, whenever this is possible. For smaller piston engined airplanes at smaller airfields without ILS equipment, things are very differently though.

Due to this, the overall traffic planning tend to assure landing queues are avoided.
Answer: so-called SLOT-times
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Stemmatics, stemmology or stemmatology is a rigorous approach to textual criticism. Karl Lachmann (1793–1851) greatly contributed to making this method famous, even though he did not invent it. The method takes its name from the word stemma. The Ancient Greek word στέμματα and its loanword in classical Latin stemmata may refer to "family trees". This specific meaning shows the relationships of the surviving witnesses (the first known example of such a stemma, albeit with the name, dates from 1827). The family tree is also referred to as a cladogram. The method works from the principle that "community of error implies community of origin." That is, if two witnesses have a number of errors in common, it may be presumed that they were derived from a common intermediate source, called a hyparchetype. Relations between the lost intermediates are determined by the same process, placing all extant manuscripts in a family tree or stemma codicum descended from a single archetype. The process of constructing the stemma is called recension, or the Latin recensio.

What is implied when two witnesses have a number of errors in common?
Answer: it may be presumed that they were derived from a common intermediate source
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As of 2000[update], there were 67,115 private households in the municipality, and an average of 1.8 persons per household. There were 34,981 households that consist of only one person and 1,592 households with five or more people. In 2000[update], a total of 65,538 apartments (90.6% of the total) were permanently occupied, while 5,352 apartments (7.4%) were seasonally occupied and 1,444 apartments (2.0%) were empty. As of 2009[update], the construction rate of new housing units was 1.2 new units per 1000 residents.

What is the average of people per household in Bern?
Answer:
1.8 persons