The redmapper galaxy cluster catalog from DES Science Verification data

We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to 150 {{deg}}2 of Science Verification (SV) data from the Dark Energy Survey (DES), and to the Sloan Digital Sky Survey (SDSS) DR8 photometric data set. The DES SV catalog is locally volume limited and contains 786 clusters with richness lambda \gt 20 (roughly equivalent to {M}{{500c}}≳ {10}14 {h}70-1 {M}o ) and 0.2\lt z\lt 0.9. The DR8 catalog consists of 26,311 clusters with 0.08\lt z\lt 0.6, with a sharply increasing richness threshold as a function of redshift for z≳ 0.35. The photometric redshift performance of both catalogs is shown to be excellent, with photometric redshift uncertainties controlled at the {sigma }z/(1+z)~ 0.01 level for z≲ 0.7, rising to ~0.02 at z~ 0.9 in DES SV. We make use of Chandra and XMM X-ray and South Pole Telescope Sunyaev--Zeldovich data to show that the centering performance and mass--richness scatter are consistent with expectations based on prior runs of redMaPPer on SDSS data. We also show how the redMaPPer photo-z and richness estimates are relatively insensitive to imperfect star/galaxy separation and small-scale star masks

Erratum to: 36th International Symposium on Intensive Care and Emergency Medicine

[This corrects the article DOI: 10.1186/s13054-016-1208-6.]

On the (Non)Institutional Disclosure of Urban Commons: Evidence, Practices and Challenges From the Netherlands and Belgium

The 2008 economic crisis has opened the door to new strategies for managing urban resources. In fact, the interest in urban commons (UC) has (re)surfaced both within and outside academia. While literature accounting for existing experiences is growing; UC as a practice begs for further systematization concerning the needed negotiation between institutional recognition and informal self-organization. This is particularly true for temporary urbanism, a strategy for the social repurposing of temporarily unused buildings, whose precarious nature has been deemed to represent just a fixing to the neoliberal logic. In this regard, a non-institutional perspective can help shed light on citymaking as a composite practice in which both institutional and non-institutional actors not only coexist but presuppose each other. In this paper, we explore this issue by focusing on two non-profit organizations working in the Rotterdam and Brussels's housing market: Stad in de Maak and Communa. Through in-depth interviews with the founders and core members of these organizations, as well as with participants to their projects, we show how SidM and Communa operate as intermediaries in the housing sector, filling the gaps left by the market and public actors. Most importantly, our research questions the extent to which the enacting of commoning practices by these organizations can become a pillar of citymaking, configuring an iterative disclosure and (collective) reclosure of urban resources. Evidence shows that, while enacting temporary urbanism differently, both organizations strive for social cooperative ownership of spaces for consolidating their presence in the cities.Urban Data Scienc

Energy transfer and dissipation tensor anisotropy in atmospheric turbulence

Turbulence in the atmosphere is generally affected by rotation and stratification. The combination of these two effects endows the atmosphere with wavelike motions, which are particularly relevant for the mixing processes in the middle and upper atmosphere. Gravity-waves, for instance, can transfer energy over large distances, carrying energy from where they are created to regions thousands of kilometers away (Fritts and Alexander (2003)). Due to wave instabilities, they break and induce small scale turbulence in the overall large scale flow, thus contributing to the mixing process. In current general circulation models, however, small scale motion is not resolved and instead only parametrized. Hence, understanding the breaking process can potentially lead to improved parametrization models and predictions. Depending on their frequency, gravity-waves can be classified as high-frequency gravity-waves (HGWs) and low-frequency inertia-gravity waves (IGWs). The breaking behavior of IGWs differs fundamentally from HGWs and must be investigated separately (Dunkerton (1997), Achatz and Schmitz (2006), Fruman et al. (2014)). Given that the wave breaking event leads to small scale three-dimensional turbulence, computational investigations must resolve a very large range of dynamic scales of motions (Lelong and Dunkerton (1998) and Fritts et al. (1994)). For HGWs, three-dimensional high resolution Direct Numerical Simulations (DNS) have already been performed, for example, by Fritts et al. (2009) and Remmler et al. (2015). For IGWs, fully threedimensional investigations of a IGW breaking in the upper mesosphere were first presented by Remmler et al. (2012) and Fruman et al. (2014). The present work focuses on turbulence induced by the breaking events of IGWs. We extend the work of Remmler et al. (2012) and Fruman et al. (2014) by performing DNS of an IGW breaking at a lower altitude and correspondingly higher Reynolds number typical of the middle mesosphere. Additionally, we explain the turbulent energy transfer during breaking events and analyze the structure of the turbulence dissipation tensor. Finally, we perform Large-Eddy Simulations (LES) using different models. We compare LES results to our DNS and asses if these models can be used to qualitatively predict breaking events.Aerodynamic

As Found. At Hand.

This paper explores how intuition plays a role in navigating the complexities of projects dealing with heritage, drawing from the practical experience in the office of Marie-José Van Hee architecten. Van Hee has a dual relationship with heritage. On the one hand, the Flemish heritage inventory – set up around the time she started her architecture career in the 1970s, feels limiting in her creative work. On the other hand, her oeuvre is considered of value by the same heritage instances, exemplifi ed by the listing of two of her early projects dating from the 1980s, being House Lowie-Derks (1984-86) and the electricity transformer (1982-84), both located in the Ghent Prinsenhof. The work of Marie-José Van Hee starts from a given context, never from a white page. This paper examines how the first primer of observation of the place – the built environment as found – and the interpretation of the context, consisting of a wide variety of vectors, such as social, geographical, and morphological, are essential to understand design possibilities. The elements that the architect considers significant enough to create or not a project are then confided to paper in a series of design exercises and discussed with co-workers, and only later with clients. Marie-José Van Hee often works subliminally with heritage, referencing architectural precedents and her travel experiences. She subtly cuts through layers of history, like peeling an onion and defi ning the depth of the cut with each design decision. Van Hee borrows shapes and lines but also developed her own language. Detailing is based on the logic of old construction techniques and experimenting with new materials. The research is thorough, takes the time it needs and happens in dialogue with makers, craftsman, and material producers, inspired by and contributing to traditional construction methods. This paper considers the role of creativity in the translation of the “as found” and in making heritage-related decisions that are at the same time technical and intuitive, inspired by past experiences, travels, or the drawing process. It aims at contributing to a deeper understanding of what intuition could mean for the design process and how it can be used to broaden up the meaning and value of heritage for the creation of contemporary architectural experiences that respect or highlight local values and narratives. It focuses on two projects of Marie-José Van Hee architecten: her own house in Ghent and House HdF in Zuidzande, The Netherlands.The organization of this international colloquium was made possible through the generous fi nancial support of the DIOS Incentive Fund (UHasselt), the Doctoral School of Behavioral Sciences and Humanities (UHasselt), and the Research Foundation Flanders (FWO), as well as the invaluable practical assistance provided by the Faculty of Architecture and Arts of UHasselt and the Flanders Architecture Institute. Our heartfelt appreciation goes out to all our esteemed colleagues whose dedicated efforts contributed to the seamless execution of this event. This colloquium is organized as an extension of the exhibition As Found: Experiments in Preservation by the Flanders Architecture Institute. Curated by Sofie De Caigny, Hulya Ertas and Bie Plevoets, the exhibition is on show at De Singel, Antwerp, from 6 September 2023 to 17 March 2024. The exhibition is accompanied by a catalogue, available in English (ISBN: 9789492567321) and Dutch (ISBN: 9789492567338).Situated Architectur

Geodetic sensor systems and sensor networks: Positioning and applications

This contribution focuses on geodetic sensor systems and sensor networks for positioning and applications. The key problems in this area will be addressed together with an overview of applications. Global Navigation Satellite Systems (GNSS) and other geodetic techniques play a central role in many applications like engineering, mapping and remote sensing. These techniques include precise positioning, but also research into non-positioning applications like atmospheric sounding using continuously operating GNSS networks. An important research area is multi-sensor system theory and applications to airborne and land-based platforms, indoor and pedestrian navigation, as well as environmentalmonitoring. The primary sensors of interest are GNSS and inertial navigation systems. Furthermore, Interferometric Synthetic Aperture Radar (InSAR) is recognized as one of the most important state-of-the-art geodetic technologies used for generation of Digital Elevation Models and accurately measuring ground deformationsSpace EngineeringAerospace Engineerin

Simple, controllable and environmentally friendly synthesis of FeCoNiCuZn-based high-entropy alloy (HEA) catalysts, and their surface dynamics during nitrobenzene hydrogenation

High-entropy alloys (HEAs) have rapidly become one of the hottest research topics in several fields, including materials science, corrosion technology, and catalysis because of their multiple advantages and their potential applications. In this study, using a novel straightforward electroless deposition method, multi-elemental alloys (FeCoNiCuZn) supported on graphite were prepared with controlled metal loading (HEA/g-X; X = 40, 80, 100) without any high temperature post-treatments. These materials were characterized using scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction, and showed a composition ranging from 11 at.% to 31 at.% for each metallic element, a total metal loading varying from 1.3 to 5.2 at.% (5.9 to 21.5 wt.%), homogeneous distribution, and an amorphous structure. Electrochemical impedance spectroscopy, cyclic voltammetry, linear sweep voltammetry, and chronoamperometry were used to evaluate the surface dynamics and the effect of the solution pH during the electrochemical hydrogenation of nitrobenzene using the HEA/g-40 material. The nitrobenzene conversion (>9 mmolNB gcat-1 h−1) and aniline production (≈ 4 mmolAN gcat-1 h−1) rates in Na2SO4 solution (at −1.0 V vs. Ag/AgCl) demonstrated a strong dependence on the applied potential. After comparing the results in alkaline medium (KOH), a competitive adsorption of species (nitrobenzene and H2O) was observed, showing a synergistic effect that greatly improved the selectivity of the nitrobenzene hydrogenation to aniline, from 23% in Na2SO4 to an outstanding 94% in KOH at the same applied potential, surpassing the results of a platinum electrode (34% in KOH). These results provide insightful information regarding the nature of the active sites involved in each step of the reaction mechanism, and gives useful means to develop new, tailored multifunctional HEA electrocatalyst materials.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Micro and Nano Engineerin

Psychologists role in Brazilian aviation - present and perspectives

This article describes a Group Discussion ocurred on the I National Congress of the Brazilian Aviation Psychology Association (ABRAPAV), in 2016. Among 158 participants on the event, 146 took part of this Group Discussion: 75 psychologists; 6 Psychology students; 25 other aviation profissionals; 40 professionals with unidentified formation. They chose one of the following subgroups to discuss about Aviation Psychology activities, facilities, difficulties and suggestions: Regular Aviation; Nonregular/ General Aviation; Military Aviation; Regulator Authority/Aeronautical Industry; Clinics/Hospitals; Airclubs/ Aviation Schools/ Universities/Training Centers; Air Navigation/Airports. After the discussion, each subgroup representative presented the results of the main activities, facilities, difficulties and suggestions, respectively, as examples: Aeronautical Accidents Prevention; Managers Recognition, Support and Confidence; Reactive Organizational Cultures, Changes Resistence and Inflexible Manager; Professional Specialization and Specific Standard for Aviation Psychology. This enabled ABRAPAV to map relevant demands in this area and plan strategies for psychologists to minimize constraints and support improvements in their organizations

Review on floating wave-wind energy converter plants: Nonlinear dynamic assessment tools

Hybrid wave-wind energy converters are considered an innovative solution to decrease costs in the various phases of installation and operation and lead to a lower Levelized Cost of Energy. Currently, there are different concepts in various Technology Readiness Levels. This paper provides a comprehensive review of existing wave-wind energy converters and the possible nonlinear dynamic assessment tools along with a discussion on their advantages and limitations. This paper broadly reviews and highlights the current level of understanding and knowledge of the relevant phenomena and their effects on the dynamic response of the existing concepts. The synergies between wind and wave energy -converters are discussed and key points for their future research and development are provided. It is shown that more than 60 % of studies are linear based which cannot reflect the highly nonlinear dynamic interaction between multi-bodies. It is demonstrated that the current lack of accurate simulation tools can be compensated by the proposed multilevel micro–macro modelling. This novel approach will allow representing the involved physical phenomena in the simulation of hybrid concepts taking into account the known limitations and lessons learned from the development of single or hybrid concepts and the simulation tools.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Offshore Engineerin