CS 1173 Computation for Scientists and Engineers
Scatter plot gallery


Raised houses reduce mosquito bites

Relationship between landing number and number of mosquitoes 
caught in light traps This paper reports a study conducted in Sao Tome off the West African country of Gabon to test whether building houses on stilts is an effective technique for reducing occupant mosquito bites. The x-axis of the figure shows the monthly average number of mosquitoes per light trap. The y-axis of the figure shows the monthly average number of mosquitoes landing per hour on a person sitting at the same location. The caption incorrectly identifies the contents of the figure. The purpose of the figure was to establish the reliability of using light trap counts to infer the number of actual bites that occupants would incur at that location.  The authors concluded:

"People in houses raised on stilts suffer fewer mosquito attacks than people living on the ground. House construction affects indoor exposure to malaria vectors in suburban São Tomé just as it does in rural Vietnam. Most An. gambiae were caught outside, at ground level and the least were caught inside houses built on stilts. Houses built at ground level had more mosquitoes in them than houses built on stilts. This can give rise to an 18-fold difference in exposure to malaria vectors between houses less than 10 m apart. Not unexpectedly higher mosquito numbers in light-traps were associated with houses in which there was an eaves gap."

Data from:
Charlwood, J.D., Pinto, J., Ferrara, P.R., Sousa, C.A., Ferreira, C., Gil, V. and do Rosário, V.E. (2003)
"Raised houses reduce mosquito bites"
Malaria Journal 2003, 2:45 doi:10.1186/1475-2875-2-45
http://www.malariajournal.com/content/2/1/45


Fatigue and alcohol

Correspondence between fatigue and alcohol on performance impairment This paper measures the performance of forty subjects under two difference conditions: one in which they were kept awake for 28 hours, the other in which they consumed alcohol in 30 minute intervals until their blood alcohol reached 0.10%.

Side note: Criminal penalties are imposed in texas for blood alcohol content (BAC) above 0.08%.

Data from:
Dawson, D. and Reid, K. (1997)
"Fatigue, alcohol and performance impairment"
Nature, 388:235.
http://www.nature.com/nature/journal/v388/n6639/abs/388235a0.html


Alcohol mortality in Scotland

Plot of men's vs women's alcohol-related mortality Scotland has one of the highest alcohol-related death rate in Western Europe. The paper studies the difference in death rate between men and women as a function of geographic location. Each point corresponds to one of 144 census tracts in Scotland. Death rates are given in number of deaths per 100,000.

Emslie C. and Mitchell, R. (2003)
"Are there gender differences in the geography of alcohol-related mortality in Scotland? An ecological study"
BMC Public Health 2009, 9:58doi:10.1186/1471-2458-9-58
http://www.biomedcentral.com/1471-2458/9/58