Mobile health applications are applied for different purposes. Healthcare professionals and other users can use this type of mobile applications for specific tasks, such as diagnosis, information, prevention, treatment, and communication. This paper presents an analysis of mobile health applications used by healthcare professionals and their patients. A secondary objective of this article is to evaluate the scientific validation of these mobile health applications and to verify if the results provided by these applications have an underlying sound scientific foundation. This study also analyzed literature references and the use of mobile health applications available in online application stores. In general, a large part of these mobile health applications provides information about scientific validation. However, some mobile health applications are not validated. Therefore, the main contribution of this paper is to provide a comprehensive analysis of the usability and user-perceived quality of mobile health applications and the challenges related to scientific validation of these mobile applications.

This paper addresses the significant need for improvements in device version reporting and practice across the academic and technical activity monitoring literature, and it recommends assessments for new and updated consumer sensing devices. Reproducibility and data veracity are central to good scholarship, and particularly significant in clinical and health applications. Across the literature there is an absence of device version reporting and a failure to recognize that device validity is not maintained when firmware and software updates can, and do, change device performance and parameter estimation. In this paper, we propose the use of tractable methods to assess devices at their current version and provide an example empirical approach. Experimental results for heart rate and step count acquisitions during walking and everyday living activities from Garmin Vivosmart 3 (v4.10) wristband monitors are presented and analyzed, and the reliability issues of optically-acquired heart rates, especially during periods of activity, are demonstrated and discussed. In conclusion, the paper recommends the empirical assessment of new and updated activity monitors and improvements in device version reporting across the academic and technical literature.

Distance monitoring systems are popular and develop day-to-day. there are some kinds of microchips which are being used for distance monitoring in the different scientific area. In this paper, one more microchip was presented to monitoring industrial automated machines and the architecture how to implement it into programmable logic controllers without any equipment changes or reconstruction.

Fixture de-embedding is a method used to remove unnecessary effects introduced by test fixture in measurement, allowing for the accurate extraction of S-parameters for the device under test. Among the known fixture de-embedding techniques, 2× Thru de-embedding is one of the most widely used methods, both commercially and in scientific research, due to its efficiency and ease of implementation. By reducing the number of measurements required, 2× Thru de-embedding maintains its popularity compared to traditional methods. The method is standardized by the “IEEE Standard for Electrical Characterization of Printed Circuit Board and Related Interconnects at Frequencies up to 50 GHz”, which defines the design requirements for test fixtures and requires a long transmission line in the center of the 2× Thru structure. The presented paper discusses cases when 2× Thru violates the norms given by the standard, namely when the transmission line in the center of the 2× Thru structure is too short, as a result of which it is obtained that the discontinuity in the fixture does not vanish before it reaches middle point of the structure. The paper analyzes these cases, and it is accepted that even in the case of such devices, using existing de-embedding tools, it is possible to obtain correct left and right fixtures.