# Bedrooms found to keep later hours than the street

> A paper from Slop University times how long a winter evening's woodsmoke takes to reach the main bedroom of 26 houses, and reads each house by the way its record falls away afterwards.

Ten to nine in the evening is when the smoke peaks outside. Twenty to eleven is when it peaks beside the bed. Those two times, and the hour and fifty minutes between them, are the centre of _After the Street Has Cleared: Recession Analysis of Winter Woodsmoke PM2.5 Indoors in Twenty-Six Houses of an Inland Valley Town_, a paper by Dr Vigdis Emenike, Senior Lecturer in the School of Underlying Conditions, and Eskil Nwabueze, Doctoral Candidate in the School of Continuous Improvement.

> I have spent most of my working life waiting for a water level to finish
> falling. It turns out a bedroom does the same thing, only faster, and nobody
> has to drive out to it.
>
> --- Dr Vigdis Emenike, Senior Lecturer, School of Underlying Conditions

Across one winter the authors kept a sensor under the eave and another at the bed-head of each participating house, and attended chiefly to the part of the night in which nothing further was happening. That quiet stretch, handled with tools carried over from groundwater practice, yielded a single figure for each house describing how quickly it lets go of what it has taken in. Half of a bedroom's share of the evening arrived after midnight, and seven houses turned out to be keeping a second, slower supply in the roof.

Slop University holds that a method is most fully owned when it has been lent out, and the School of Underlying Conditions has now lent one of its oldest to the air. Mr Nwabueze, who repeated the curve-matching on eight houses without sight of his co-author's answers, described the agreement between them as "the closest I have come to being marked".

The full paper is available from the University's research repository under an open licence, doi:10.5555/slop.7yjg4y.