High-order projection-based upwind method for implicit large eddy simulation

We assess the ability of three different approaches based on high-order discontinuous Galerkin methods to simulate under-resolved turbulent flows. The capabilities of the mass conserving mixed stress method as structure resolving large eddy simulation solver are examined. A comparison of a variational multiscale model to no-model or an implicit model approach is presented via numerical results. In addition, we present a novel approach for turbulent modeling in wall-bounded flows. This new technique provides a more accurate representation of the actual subgrid scales in the near wall region and gives promising results for highly under-resolved flow problems. In this paper, the turbulent channel flow and periodic hill flow problem are considered as benchmarks for our simulations.</p

Crowd Monitoring in Smart Destinations Based on GDPR-Ready Opportunistic RF Scanning and Classification of WiFi Devices to Identify and Classify Visitors’ Origins

Crowd monitoring was an essential measure to deal with over-tourism problems in urban destinations in the pre-COVID era. It will play a crucial role in the pandemic scenario when restarting tourism and making destinations safer. Notably, a Destination Management Organisation (DMO) of a smart destination needs to deploy a technological layer for crowd monitoring that allows data gathering in order to count visitors and distinguish them from residents. The correct identification of visitors versus residents by a DMO, while privacy rights (e.g., Regulation EU 2016/679, also known as GDPR) are ensured, is an ongoing problem that has not been fully solved. In this paper, we describe a novel approach to gathering crowd data by processing (i) massive scanning of WiFi access points of the smart destination to find SSIDs (Service Set Identifier), as well as (ii) the exposed Preferred Network List (PNL) containing the SSIDs of WiFi access points to which WiFi-enabled mobile devices are likely to connect. These data enable us to provide the number of visitors and residents of a crowd at a given point of interest of a tourism destination. A pilot study has been conducted in the city of Alcoi (Spain), comparing data from our approach with data provided by manually filled surveys from the Alcoi Tourist Info office, with an average accuracy of 83%, thus showing the feasibility of our policy to enrich the information system of a smart destination.This research was carried out within the research Project Alcoi Tourist Lab framework, co-funded by the Alcoi City Council & the Valencian Innovation Agency. The research was also partially funded by project UAPOSTCOVID19-10 from the University of Alicante. Finally, this research was partly supported by the EU CEF project GreenMov, CARM HORECOV-21 project (https://horecovid.com/ (accessed on 12 January 2022)). is financed through the Call for Public Aid destined to finance the Strategic projects contemplated in the Research and Innovation Strategy for Smart Specialization - RIS3MUR Strategy by the Autonomous Community of the Region of Murcia, through the Ministry of Economic Development, Tourism and Employment within the framework of the FEDER Region of Murcia Operational Program 2014–2020 within the framework Thematic Objective 1. Strengthen research, technological development and innovation by 80% and with CARM’s own funds in 20%, and finally the EU project H2020 NIoVE (833742)

O subkulturach z różnych perspektyw.

Recenzja książek: Witold Wrzesień. (2013). Krótka historia młodzieżowej subkulturowości. Warszawa: PWN; Mirosław Pęczak. (2013). Subkultury w PRL. Opór, kreacja, imitacja. Warszawa: NCK; Marek Jędrzejewski. (2013). Subkultury a samorealizacja w perspektywie edukacji i socjalizacji młodzieży. Toruń: Wydawnictwo Adam Marszałek

Ascension: proposal for a reconstruction of Ure Vaeiko’s Apai recitation

The recitations of the Easter Island native Ure Vaeiko that were recorded in 1886 belong to the very small corpus of traditional Rapanui literature that has been preserved. Although the value of individual texts is disputed, the chants that were published as Atua Matariri, Eaha to Ran Ariiki Kete and Apai are generally considered to be genuine examples of so-called “Old Rapanui”. Of these three, the Apai text is by far the most enigmatic, as it has been recorded and published in a way that renders it virtually incomprehensible. The accompanying attempt at translation is a confused narrative that appears to have only a fragmentary relation to the chant. This paper presents a tentative reconstruction of the original Apai text, together with a new translation. It is proposed that Apai contains an origin myth which intends to explain certain celestial phenomena regarding the sun and the planet Venus, set against the familiar Polynesian background of the eternal struggle between the brother gods Tangaroa and Tane. As such, it could provide valuable information on pre-missionary Easter Island astronomy, mythology, and literature