No abstract

ABSTRACT. An instrument for measuring the liquid water content of aerosols is described. Aerosol samples are collected on PTFE membrane filters and then are placed in a closed chamber in which the relative humidity can be controlled over a range from 5 to 95%. A /3-gauge measures the changing aerosol mass from a low humidity through a range of increasing humidities and then through a range of decreasing humidities. The instrument corrects for changes in air density in the Egauge. A method for correcting electronic drift is described. A comparison of liquid water mass measurements of a test aerosol with gravimetric mass measurements gave a regression slope of 0.98 and a standard deviation of 0 . 7~~l r n~. Examples of analyses on a generated aerosol and a fine fraction atmospheric sample are given.

An evacuation model validation data-set collected as part of the EU FP7 project SAFEGUARD is presented. The data was collected from a cruise ship operated by Royal Caribbean International (CS). The trial was a semi-unannounced assembly trial conducted at sea and involved some 2500 passengers. The trial took place at an unspecified time however, passengers were aware that on their voyage an assembly exercise would take place. The validation data-set consists of passenger; response times, starting locations, end locations and arrival times in the assembly stations. The validation data were collected using a novel data acquisition system consisting of ship-mounted beacons, each emitting unique Infra-Red (IR) signals and IR data logging tags worn by each passenger. The results from blind simulations using maritimeEXODUS for the assembly trial are presented and compared with the measured data. Three objective measures are proposed to assess the goodness of fit between the predicted model data and the measured data.

No abstract