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I dette prosjektet har en målsetting vært å utvikle et håndholdt instrument for måling av vanninnhold i klippfisk. SINTEF Digital har utviklet en prototype av et NIR instrument som Nofima har testet ut. Resultatene er meget lovende. På et sett av 40 klippfisk, der vanninnholdet varierte fra 39.4 – 52.8%, kunne vi med dette instrumentet lage en kalibrering som kan anslå vanninnholdet med en nøyaktighet på ±1.3 %-poeng. Dette er omtrent like bra som det som oppnås med et stort og tungt NIR-instrument. Det er også vesentlig bedre enn det man normalt klarer å anslå ved tradisjonell vraking av fisken. Instrumentet er per i dag en prototype og videre utvikling er nødvendig dersom det skal bli tilgjengelig for næringa.

We present initial results from measurements of exhaled droplets by two singers during singing, speaking, laughing, and recitation of poetry. We also conducted measurements with a flute, a clarinet, a tuba, and only the tuba's mouthpiece. To be able to image and track droplets, we have developed and built a portable measurement set-up. We have detected droplets with diameters of approximately 50 micrometre and above. We found that for a single subject, the largest amount of droplets are produced during singing, but that laughing can produce a comparable number of droplets. Speaking and recitation of poetry do not produce as many droplets. We repeated exercises at varying distances and found that the number of detected droplets decreased rapidly with increasing distance. Most droplets we detected follow a ballistic trajectory, and hit the ground after a distance of approximately 1 m. In case of the musical instruments, we did not detect droplets exiting a tuba and only few single droplets from a flute and a clarinet. A clarinet usually points downwards, such that droplets follow a downward trajectory and hit the ground after a short distance. The situation was different when the tubist used only the mouthpiece (that is, detached from the tuba) during warm-up while partially blocking the opening with a finger: in this case, many droplets were ejected from the mouthpiece. These followed ballistic trajectories at different speeds, with some droplets exiting the measurement volume. Two important limitations of this study are that (i) the sample size is very small, such that a statistical analysis is beyond our scope; and (ii) that we cannot draw conclusions about a possible risk of infection with COVID-19 when performing any of the said activities., Comment: The original project memo can be downloaded here: https://hdl.handle.net/11250/2888270. The are only minor differences between these two versions: (1) the slightly adapted title; (2) shortened abstract due to character constraint; and (3) an added sentence on supplemental material including the reference