Title Participants Abstract "Experimental evaluation of UWB indoor positioning for indoor track cycling" "Kevin Minne, Nicola Macoir, Jen Rossey, Quinten Van den Brande, Sam Lemey, Jeroen Hoebeke, Eli De Poorter" "Accurate radio frequency (RF)-based indoor localization systems are more and more applied during sports. The most accurate RF-based localization systems use ultra-wideband (UWB) technology; this is why this technology is the most prevalent. UWB positioning systems allow for an in-depth analysis of the performance of athletes during training and competition. There is no research available that investigates the feasibility of UWB technology for indoor track cycling. In this paper, we investigate the optimal position to mount the UWB hardware for that specific use case. Different positions on the bicycle and cyclist were evaluated based on accuracy, received power level, line-of-sight, maximum communication range, and comfort. Next to this, the energy consumption of our UWB system was evaluated. We found that the optimal hardware position was the lower back, with a median ranging error of 22 cm (infrastructure hardware placed at 2.3 m). The energy consumption of our UWB system is also taken into account. Applied to our setup with the hardware mounted at the lower back, the maximum communication range varies between 32.6 m and 43.8 m. This shows that UWB localization systems are suitable for indoor positioning of track cyclists." "Google Indoor Maps or Google Indoor No Maps? Usability study of an adapted mobile indoor wayfinding aid" "Laure De Cock, Kristien Ooms, Nico Van de Weghe, Philippe De Maeyer" "Characterization of coverage and indoor penetration loss of DVB-H signal of indoor gap filler in UHF band" "Wout Joseph, Leen Verloock, David Plets, Emmeric Tanghe, Luc Martens" "Indoor green can modify the indoor dust microbial communities" "Yinthe Dockx, Martin Taubel, Esmee M. Bijnens, Katrien Witters, Maria Valkonen, Balamuralikrishna Jayaprakash, Janneke Hogervorst, Tim S. Nawrot, Lidia Casas Ruiz" "Little is known about the potential role of indoor plants in shaping the indoor microbiota. Within the ENVIRONAGE birth cohort, we collected settled dust and performed 16S and ITS amplicon sequencing and qPCR measurements to characterize the indoor microbiota, including bacterial and fungal loads and Chao1 richness, Shannon, and Simpson diversity indices. For 155 households, we obtained information on the number of indoor plants. We performed linear regression models adjusted for several a priori chosen covariables. Overall, an increase in indoor plants and density was associated with increased microbial diversity, but not load. For example, we found an increase of 64 (95%CI:3;125) and 26 (95%CI:4;48) units of bacterial and fungal taxa richness, respectively, in households with more than three plants compared to no plants. Our results support the hypothesis that indoor plants can enrich indoor microbial diversity, while impacts on microbial loads are not obvious." "A review of semi-volatile organic compounds (SVOCs) in the indoor environment: occurrence in consumer products, indoor air and dust" "Luisa Lucattini, Giulia Poma, Adrian Covaci, Jacob de Boer, Marja H. Lamoree, Pim E. G. Leonards" "As many people spend a large part of their life indoors, the quality of the indoor environment is important. Data on contaminants such as flame retardants, pesticides and plasticizers are available for indoor air and dust but are scarce for consumer products such as computers, televisions, furniture, carpets, etc. This review presents information on semi-volatile organic compounds (SVOCs) in consumer products in an attempt to link the information available for chemicals in indoor air and dust with their indoor sources. A number of 256 papers were selected and divided among SVOCs found in consumer products (n = 57), indoor dust (n =104) and air (n = 95). Concentrations of SVOCs in consumer products, indoor dust and air are reported (e.g. PFASs max: 13.9 lig/g in textiles, 5.8 ggikg in building materials, 121 ng/g in house dust and 6.4 ng/m(3) in indoor air). Most of the studies show common aims, such as human exposure and risk assessment. The main micro-environments investigated (houses, offices and schools) reflect the relevance of indoor air quality. Most of the studies show a lack of data on concentrations of chemicals in consumer goods and often only the presence of chemicals is reported. At the moment this is the largest obstacle linking chemicals in products to chemicals detected in indoor air and dust. (C) 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license." "Statistical whole-body averaged SAR in indoor microenvironments by cellular communication and indoor signals" "Günter Vermeeren, Francis Goeminne, Wout Joseph, Luc Martens" "Help, ik zit erdoor! : de behandeling van surmenage en burn-out door de huisarts, deel 2" "Roland Rogiers, Sibyl Anthierens, E Boydens, T Daeseleire, L Pauwels" "Indoor and outdoor air quality assessment in daycare centres in Ghent (Belgium) in view of outdoor sleeping in an urban environment" "Gynaika De Coster, Preben Van Overmeiren, Lore Vandermeersch, Herman Van Langenhove, Kristof Demeestere, Christophe Walgraeve" "Within Flanders, there is an increasing trend to let children sleep outdoors while in daycare. However, within an urban environment, the densely spread emission sources might affect the air quality and possibly limit the areas where outdoor sleeping is favourable. Nevertheless, there is a lack of data regarding the atmospheric pollution levels in and around daycare centres (DCC). Therefore, the focus of this study is to chemically characterize the air quality indoors, outdoors, and in specifically designed cubicles for outdoor sleeping at 12 DCCs spread over the city of Ghent (Belgium). The measuring of a very broad range of different pollutants, provides unique data for indoor and outdoor air quality at daycare centres in Ghent. The use of axial tube (for volatile organic compounds, VOCs) and Radiello (for NO2, SO2, O3) passive samplers enables multi-component sampling, resulting in time -weighted average concentrations for one week. Forty-seven VOCs are identified and, for the majority (40), in-door to outdoor concentration (I/O) ratios higher than one are found. For the remaining seven compounds (e.g. benzene) outdoor concentrations are a factor 1.3-17.9 (median) higher than indoors. Median indoor TVOC concentrations are 152 mu g/m3 and 142 mu g/m3 for the September and January campaign, respectively. Outdoors, these median TVOC concentrations are much lower (24.5 mu g/m3 and 30.6 mu g/m3). For NO2, no noticeable dif-ferences are observed between average indoor and outdoor concentrations (indoors 12 +/- 3 mu g/m3 and 13 +/- 2 mu g/m3 for the September and January campaign, respectively, and outdoors 11 +/- 3 mu g/m3 and 14 +/- 4 mu g/m3). The highest (outdoor) measured concentration is 21 +/- 1 mu g/m3. SO2 concentrations are below 2.62 mu g/m3 (LOQ). Average indoor O3 concentrations are 4 +/- 3 mu g/m3 and 2 +/- 2 mu g/m3 for the September and January campaign, respectively. Much higher values are measured outdoors (46 +/- 3 mu g/m3 and 40 +/- 11 mu g/m3), but the concentrations stayed well below legal standards." "Which type of solar cell is best for low power indoor devices?" "Ben Minnaert" "Low power devices such as sensors and wireless communication nodes, focused towards indoor applications, face serious challenges in terms of harvesting nearby natural sources of energy for power. Nowadays, these wireless systems use batteries as source of energy. These batteries need to be replaced in due time and this factor plays a major role in determining the life of the device. Often, the cost of replacing the battery outweighs the cost of the device itself. Also from an environmental perspective, reducing battery waste is laudable. In order to obtain an U+201CinfiniteU+201D lifetime of the system, the device should be able to harvest energy from renewable resources in the deviceU+2019s environment. Photovoltaic (PV) energy is an efficient natural energy source for outdoor applications. However, for indoor applications, the efficiency of classical crystalline silicon PV cells is much lower. Typically, the light intensity under artificial lighting conditions found in offices and homes is less than 10 W/m² as compared to 100-1000 W/m² under outdoor conditions. Moreover, the spectrum is different from the outdoor solar spectrum. Although the crystalline Si cell is still dominating the PV market, second generation solar cells, i.e. thin film technologies, are rapidly entering the market. The different PV cells are rated by their power output under standard test conditions (AM1.5 global spectrum and light intensity of 1000 W/m²) but those conditions are not relevant for indoor applications. The question therefore arises: which type of solar cell is best for indoor devices? This paper contributes to answering that question by comparing the power output of different thin film solar cells (CdTe, CIGS, amorphous Si, GaAs and an organic cell with active layer P3HT:PCBM) with the classical crystalline silicon solar cell as reference. This comparison is made for typical artificial light sources, i.e. an LED lamp, a U+201CwarmU+201D and a U+201CcoolU+201D fluorescent tube and a common incandescent and halogen lamp, which are compared to the outdoor AM1.5 spectrum as reference. All light sources (including the outdoor spectrum) are scaled to an illumination of 500 lux to obtain a correct comparison. The best artificial light source for all cell types is the incandescent lamp which, for Si and CIGS, improves the performance of the cell with a factor of 3 compared with AM 1.5. The LED lamp is the worst light source for indoor PV with a decrease in performance of a quarter for amorphous silicon to two thirds for crystalline silicon cells. The best solar cells for indoor use depend heavily on the light source. For an incandescent lamp, crystalline silicon remains the best. However, for an LED lamp or U+201CwarmU+201D fluorescent tube, amorphous silicon is significantly better. For U+201CcoldU+201D fluorescent tubes as light sources, CdTe solar cells perform the best." "Measurement-based analysis of specular and dense multipath components at 94GHz in an indoor environment" "Brecht Hanssens, Maria-Teresa Martinez-Ingles, Emmeric Tanghe, David Plets, Jose-Maria Molina-Garcia-Pardo, Claude Oestges, Luc Martens, Wout Joseph"