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Pump-Free Microfluidics for Cell Concentration Analysis on Smartphones in Clinical Settings (SmartFlow): Design, Development, and Evaluation

Pump-Free Microfluidics for Cell Concentration Analysis on Smartphones in Clinical Settings (SmartFlow): Design, Development, and Evaluation

RQ3, Can smartphone-captured videos be used to estimate cell count and concentration in microfluidic chips? We designed and conducted a cell flow velocity experiment and cell concentration analysis experiment to validate 3 hypotheses. Through the cell flow velocity experiment, we demonstrated the importance of flow velocity control for computer vision–based cellular analysis.

Sixuan Wu, Kefan Song, Jason Cobb, Alexander T Adams

JMIR Biomed Eng 2024;9:e62770

Investigating Associations Between Changes in Mobile Phone Use and Emotions Using the Experience Sampling Method: Pilot Study

Investigating Associations Between Changes in Mobile Phone Use and Emotions Using the Experience Sampling Method: Pilot Study

Guided by previous literature, the following hypotheses were postulated: (1) a general increase of phone use will be associated with higher scores on negative affect, lower levels of positive affect, and lower levels of concentration [21,36] and (2) whenever a person cannot engage in mobile phone use, increased levels of negative affect will ensue. Recruitment took place in September 2016 using posters distributed at Maastricht University Medical Centre in Maastricht, The Netherlands.

Suzanne Roggeveen, Jim van Os, Kelly Bemelmans, Mikal van Poll, Richel Lousberg

JMIR Form Res 2018;2(1):e12