A sonar based device with tactile feedback was developed to improve the mobility and independence of visually impaired individuals. It features a transceiver/receiver, a potentiometer, a microcontroller, a rechargeable polymer lithium ion battery, and a Nokia Cell phone vibrator. All components are commercially available and housed in a custom acrylic package with 86 mm × 34 mm × 12 mm in dimension, and 120 grms in weight. Additionally, the device features an adjustable detection scheme for user customization of distance range, and a tactile feedback system that avoids interference with auditory sensory information. The device was tested for its navigational efficacy in an artificial indoor environment, and in a live outdoor setting. Ten subjects (9 males and 1 female), with a mean age of 35 years-old (range: 17 to 52) were presented with a series of navigational tasks resulting in considerable reduction of head, shoulder, chest, and arms collisions during their locomotion. We conclude that this device greatly improves the mobility and safety of visually impaired individuals.
There is an algorithm presented that uses multispectral images as a result of the processing of images and the MATLAB software. These multispectral images could be applied to cacao and coffee crops, which are not only the most representative type of the region of Santander but also the ones with most economic growth in the last two decades. The strategy of deploying these images also helps to demarcate the dry lands from the better-hydrated ones, which is crucial to develop Precision Farming since it makes it more productive, with fewer losses and with better benefits. The graphical user interface (GUI) was developed in order to facilitate the interaction between the software and the user. On this graphical interface, it is possible to identify the varied applications that could be run and recognized. It is worth mentioning that this process has several stages. It begins from the analysis of a satellite image database, which establishes the characteristics and condition of the crops; from it, it is possible to obtain a more accurate and detailed radiogram that illustrates the reality of each crop.
This paper presents a comparison of the stability of the MFxLMS and FxLMS algorithms, applied to the low frequency narrowband Active Noise Control (ANC). This work focuses on the study of the secondary path in a headset, and the effect of its variations in the system's stability. The analysis is completed with simulations that support the conclusions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.