فهرس المقالات Indoor air quality

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  1 - An Assessment of Indoor Air Quality and Thermal Comfort in Educational Spaces (Case Study: Girls' High Schools in Arak, Iran)
  Azin Velashjerdi Farahani Mansoureh Tahbaz Shahram Delfani
  10.30495/ijaud.2020.15847
  As s‌tudents spend one-third of their time at school, their health, comfort, and productivity are mos‌tly influenced by thermal condition and indoor air quality of classrooms. Regarding that manual window-opening is a common way for providing fresh air in classes and s‌ أکثر

  As s‌tudents spend one-third of their time at school, their health, comfort, and productivity are mos‌tly influenced by thermal condition and indoor air quality of classrooms. Regarding that manual window-opening is a common way for providing fresh air in classes and s‌tudents aren't allowed to change their uniform, position or control the windows during the lesson hours, providing thermal comfort in winters may cause a lack of fresh air and therefore, dissatisfaction. This article is trying to evaluate the indoor air quality, and thermal condition of the classrooms, in two typical classrooms for 15-16-year-old girls in Arak, Iran. The overall s‌tudy objective is to compare indoor microclimate measured parameters, with (1) s‌tudents' subjective judgment, collected through a ques‌tionnaire, and (2) s‌tandards and to inves‌tigate the effects of microclimate on the indoor environmental condition of classrooms. According to the results, the thermal sensation of the students depends on their clothing rate and their understanding of the thermal state. In contrast, their thermal satisfaction is affected by the amount of fresh air provided. In winter, because of closed windows, students are mostly dissatisfied with the air quality and, therefore, thermal comfort, while in spring that the indoor environmental conditions meet the standards; the students feel satisfied with the conditions. The results of this research show that the indoor environment of the classrooms is mainly influenced by internal loads; consequently, its thermal condition is not a defining parameter. تفاصيل المقالة
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  2 - ‎Fuzzy Model of Smart Toilet Bowl-Bidet System
  Yeesock Kim
  10.30495/tfss.2022.1965746.1045
  This paper proposes an application of a Takagi-Sugeno fuzzy model to the prediction of complex mass transfer behavior in smart toilet bidet systems. The model is constructed through the integration of fuzzy logic theory, nonlinear autoregressive moving average exogenous أکثر

  This paper proposes an application of a Takagi-Sugeno fuzzy model to the prediction of complex mass transfer behavior in smart toilet bidet systems. The model is constructed through the integration of fuzzy logic theory, nonlinear autoregressive moving average exogenous input models, neural networks, and data clustering algorithms. To develop the model for estimating the air quality of the smart toilet-bidet system, many datasets are collected from a smart toilet bidet model equipped with an automatic odor/bacteria suction system using Sulfur hexafluoride (SF6) gas. Many case studies were carried out as a function of the suction flow rate, suction angle, the number of suction holes, and suction hole size. The inputs for training the fuzzy model are the size, number, and angles of suction holes, whereas its output is the undesirable gas concentration. The trained fuzzy model is tested using different datasets. Modeling and testing results show the effectiveness of the fuzzy model in predicting the gas concentration of the toilet bowl. The proposed fuzzy model is expected to be useful in the implementation of smart toilet bowl systems in the near future. تفاصيل المقالة