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Various types of printed substrates were researched for their capabilities to interact with liquids, the contact wetting angle was studied as well as the adhesion of the liquid to the substrate’s surface. The methodology of detailed experimental research was developed in order to thoroughly study the phenomena occurring on the printed substrate’s surface (several paper types, designer’s cardboards and papers, films) while being wetted by the liquid. The experimental research frames as well as the timeframes had been set, the experimental material selection was explained, and also the results were fixated.Based on the obtained experimental data for contact wetting angle change the approximated graphical dependencies were built. Gained table data were additionally checked to be corresponding with the statistical methods of data processing and as a result the linear equations were obtained showing the relation between the contact wetting angle with the time based on the smallest quadrants method, the kinetics had been also analyzed from the acceleration point of view. The average approximation tolerance and the determination coefficient were defined. The water penetration dynamics into the paper’s internal structure was analyzed based on the experimental data and its’ mathematical explanation. The correlative ties of the biggest water penetration resistance Tmax from the porosity in the point indicator (T95) and from surface liquid volume W were determined.For ink jet printing, you can use coated and offset paper, which is confirmed by the results of the research. The use of design paper and films can cause the process of fixing ink to the imprint and obtaining poor quality products. The linear dependence of the winding angle on time is established.The point-to-point porosity (T95) and the surface water level influence the greatest resistance to water penetration Tmax. In this case, the wetting of the surface of the paper has the greatest impact on the investigated index. All communication forces, t-statistics, are statistically significant in the appropriate choice of significance level.

The use of cervical auscultation in the evaluation of the pharyngeal swallow may become a part of the clinical evaluation of dysphagic patients. Though its use is based on subjective evaluation, an acoustic analysis of swallowing sounds might establish more objective criteria in the detection of swallowing disorders. The present study sought to investigate three aspects of the methodology for detecting swallowing sounds: (1) the type of acoustic detector unit suited to an acoustic analysis of the pharyngeal swallow, (2) the type of adhesive suited for the attachement of the detector, and (3) the optimal site for sound detection of the pharyngeal swallow. An accelerometer with double-sided paper tape was selected as the appropriate detector unit because of its wide range of frequency response and small attenuation level. Using this detector unit, swallowing sounds and noise associated with simulated laryngeal elevation and the carotid pulse were acquired at 24 sites on the neck in 14 normal subjects; these signals were acoustically analyzed. The determination of the optimal site for detecting swallowing sounds was based on the signal-to-noise ratio. The site over the lateral border of the trachea immediately inferior to the cricoid cartilage is the optimal site for detection of swallowing sounds because this site showed the greatest signal-to-noise ratio with the smallest variance. The site over the center of the cricoid cartilage and the midpoint between the site over the center of the cricoid cartilage and the site immediately superior to the jugular notch were also considered to be the most appropriate sites.