Three different temperatures (90, 120, and 150°C), five different reaction times (90, 120, 180, 240 and 300 min), five levels of methanol volume (1, 2, 4, 6, 8 mL), and five levels of n-hexane volume (2, 4, 6, 8, 10 mL) were used for the experimental trials to establish optimal conditions.
At the beginning of each block, 50 English words (Calibri font, size 24) were presented simultaneously on the screen for either 0.5, 1, or 1.5 min to create three levels of difficulty in which participants performed at neither chance nor ceiling.
As a first step, the MS fingerprints for (C) and (G) were obtained as the sum of all the spectra between 0 and 1.0 min, at six levels of concentration (2, 20, 50, 100, 200 and 400 μg mL-1).
By way of illustration, Tables 2, 3 and 4 show the converging dwell times for a planned headway of 8 min, detailed for the three levels of travel demand analysed.
Open image in new window Fig. 8 Link analysis (min support 0.40, min confidence 0.4, continuous variables reduced to three levels, maximum three items in an item set).
Walking for transport is categorized into three levels: none (≥ 1 <60 <span class="lh lhl">mins), moderate (≥ 60 <150 mins), and high (≥ 150) and cycling for transport is categorized as none (0) and any (>0 mins).
These were intended to last around 3 min. We selected four levels of video quality combined with three levels of wideband audio quality codec leading to 12 audiovisual conditions.
61 min Three substitutions.
90 min Three minutes of extra time.
90+1 min Three minutes of added time.
