Abstract

Abstract

Abstract
This study presents a dataset containing three layers of data that are useful for body position classification and all uses related to it. The PoPu dataset contains simultaneously collected data from two different sensor sheets-one placed over and one placed under a mattress; furthermore, a segmentation data layer was added where different body parts are identified using the pressure data from the sensors over the mattress. The data included were gathered from 60 healthy volunteers distributed among the different gathered characteristics: namely sex, weight, and height. This dataset can be used for position classification, assessing the viability of sensors placed under a mattress, and in applications regarding bedded or lying people or sleep related disorders. Dataset The dataset is available on GitHub: https://github.com/rdionisio1403/PoPu/. Dataset License The dataset is available under Creative Commons (CC0).

Abstract
DeskVR allows users to experience Virtual Reality (VR) while sitting at a desk without requiring extensive movements. This makes it better suited for professional work environments where productivity over extended periods is essential. However, tasks that typically resort to mid-air gestures might not be suitable for DeskVR. In this paper, we focus on the fundamental task of object selection. We present TouchRay, an object selection technique conceived specifically for DeskVR that enables users to select objects at any distance while resting their hands on the desk. It also allows selecting objects' sub-components by traversing their corresponding hierarchical trees. We conducted a user evaluation comparing TouchRay against state-of-the-art techniques targeted at traditional VR. Results revealed that participants could successfully select objects in different settings, with consistent times and on par with the baseline techniques in complex tasks, without requiring mid-air gestures.

Abstract
Although city branding is not new, the importance of sustainability and environmental demands is placing an enormous chal-lenge in city/place branding activities. As such, the aim of this article is to analyze how sustainable/green city/place branding is understood and what its main idiosyncrasies are. For that an exploratory literature review was implemented and 32 articles were analyzed. It is possible to conclude that there are three main strands covering the topic related to green, sustainable, and slow city (cittaslow) or place branding. Moreover, green resources are dealt with seeking to improve the image of the city, the quality of urban life, and the green spaces supporting the city as a tourism destination. Complementarily, sustainabil-ity embraces also economic and social aspects, which are not fully covered in the previous strand. Finally, the cittaslow perspective follows a sustainable perspective more closely than the green/environmental one. The three strands are very segmented and the stage of development is still in a growing up stage. The stakeholders play an important role in disclosing the natural resources, the environmental challenges for a city/place to develop a positive sustainable reputation. Finally, there is an important role from the public policy perspective to position the city as a green, sustainable place destination.

Abstract
Thin films of Ag/Fe were deposited on the core of multimode optical fibers. The deposited film shows sensitivity to both refractive index and MF changes. Simulation work based on TMM formalism confirms experimental response. © Optica Publishing Group 2023, © 2023 The Author(s)