Applications of Vibration-Based Energy Harvesting (VEH) Devices

This chapter reviews present usage of vibration-based energy harvesting (VEH) devices and their applications. The evolution of energy resources and advancement in electronic technologies has resulted in the need for a self-sustainable wireless/portable electronic device in current modern society. Batteries are non-beneficial in the miniaturization process of electronic designing, and alternative power supplies are desperately needed to drive the advance of the wireless/portable development further. VEH has emerged as one of the most promising alternatives to replace conventional batteries and as the solution for the bottleneck. Consideration of creating an optimal vibration energy harvester is suggested through an analytical model of a mechanical transducer, including a relatively new method defined as triboelectricity. Useful applications and usages of VEH are presented, and some suggestions for improvement are also given. Lastly, the trend of energy harvesting is annotated and commented in-line with the demand of electronic sensors market.

Poly(n-vinylpyrrolidone-co-acrylonitrile-co-methacrylic acid)–graphene quantum dot conjugate: synthesis and characterization for sensing ammonia vapour

We report the biosynthesis of Graphene QDs and their composite with poly(n-vinylpyrrolidone-co-acrylonitrile-co-methacrylic acid) for efficient detection of ammonia with a detection limit of 0.232 ppm using a fabricated portable electronic device.

Factors that Determine the Purchase of Portable Electronic Devices

The study aims to discover the consumer profile and the main factors that lead them to acquire a portable electronic device (PED). An online survey was conducted, with a sample of 145 consumers involved in the beneficiation of the ornamental stone sector. Descriptive statistics, correlation analysis and multiple linear regression were applied for data analysis. This article makes advances in the development of concepts of management design, the electronic market and information systems, and uses a revised bibliography, proposing interaction with the list of strategies. The results show that, at the time of purchase, consumers of portable electronic devices take into account interconnected factors, such as brand, design and utility. Thus, we conclude that there is an interest in products that have proven multifunctionality, and also encourages research that confirms the consumer profile in expanded samples. The implications are discussed, with an emphasis on developing the new competencies that retailers need to develop, to interact with their physical configurations, through technological opportunities with mobile functionalities.

Uitsiton: wearable for mobility of the visually impaired

This article explains the development of the Uitsiton system, capable of detecting obstacles to alert visually impaired users, increasing their mobility and confidence when moving. Uitsiton is made up of a portable electronic device (wearable) and a mobile application (App) that operates under the Android platform. The wearable is integrated into a vest-like garment. It is used to compute the approximate distance between the visually impaired user and the obstacles that they can find in their path. The wearable covers a range of 180 degrees vertically and horizontally with respect to the center of the torso, and reaches a maximum distance of 120 cm. The App works synchronously with the wearable, it receives a series of data corresponding to the measurements of the distance between the user and the obstacle, and it triggers a sound pattern and a vibration pattern according to the proximity of the obstacle.

SWITCH ASSEMBLY OF THE BUILT-IN POWER SUPPLY OF A PORTABLE ELECTRONIC DEVICE

This article describes schematic diagrams of automatic load switching between a battery power source and an external (network adapter) power supply. In this work, a circuit diagram of the electrical circuit of the switching power source of a portable electronic device is proposed. The algorithm of operation of the node when changing the voltage value of the battery power source is considered.

Pilot Perceptions on the Integration of Electronic Flight Bag Information in New Flight Deck Designs

The purpose of this study was to gather usability data on a new flight deck concept in which pilots are shown certified and uncertified information concurrently on installed avionics. Specifically, we wanted to examine perceptions on the concepts of concurrent use and differentiation for electronic flight bag (EFB) applications that show ownship position. We presented an uncertified electronic chart on either a portable electronic device (PED) alone (off to the pilot’s side) or on both a PED and an installed flight deck display. The uncertified electronic chart was always shown concurrently with an approved navigation source. We differentiated the electronic chart from the navigation information via display medium (portable vs. installed) and a header labeled “EFB,” drawn at the top of the uncertified electronic chart on the installed display. Thirteen flightcrews flew eight scenarios using the flight deck concept. Pilots liked the concurrent display of the electronic chart, and the repeated display functionality, in particular, because they could control the presentation of information on the forward display using the touch screen on the side display. Our method of differentiation—a header—was less successful and suggests a need to consider the potential for stimulus habituation when evaluating these techniques.