Spaciousness is affected by lighting environment, and the calculation model with average luminance and “dark-part-reduced visible volume” is derived in the part 2 of this report. However, the reference condition of each experiment was respective and different, and the slopes of the formula were also different by experiments. In this part 3, by comparing the reference conditions of these past experiments, in real space or VR, all the conditions in different experiments were compared directly or indirectly and integrated into one spaciousness prediction function for closed interior space with the data in 3D luminance mapping.

A laboratory experiment was conducted to investigate the evaluation method of building habitability based on subjective responses to vibration caused by external sources. Twenty-five people participated in the experiment with 76 input stimulus conditions consisting of vibrations based on field records and sinusoidal vibrations in the horizontal direction. The subjective responses were measured in terms of “Magnitude”, “Concern”, and “Discomfort”. The relationships between several domestic and international evaluation methods of environmental vibration and subjective responses showed that the Vibration Dose Value in which the effect of vibration duration was considered by the fourth power was the most reasonable method.

This study aims to show the balance between the acceptable task illuminance in a steady state (T_∞) and the ratio of the task illuminance to the ambient illuminance (T/A) under the fixed T/A.

First, we show a prediction method of T_∞ with considering illuminance preference according to the 45-minute time course of the task illuminance accepted by 15 subjects. By applying this prediction method, we predict T_∞ using the 9-minute time course of the task illuminance accepted by 30 subjects.

Then, these results are combined into diagrams showing equal acceptance rates between T_∞ and T/A.

The purpose of this study is to establish effective and efficient methods of thermal insulation renovation. We examined the combinations of repairs of ceilings, outer walls, windows, and floors that could reduce medical costs and heating and cooling costs, and shorten the payback period of the costs of renovation. Assuming that a 30-year-old couple and two children would live in the accommodation after its renovation, the effective and efficient renovation methods were found to be combinations of “ceiling, floor and window” and of “ceiling and window”.

The final purpose of this study is to conduct a performance evaluation of natural ventilation control in office buildings. In this paper, field measurements were conducted focused on the opening ratio of the natural ventilation opening (e.g., opening area or number of openings). As a result, it was found that there is a correlation between the opening ratio and indoor thermal environment. Furthermore, some validity of method of the opening ratio calculation which was developed to suppress the low temperature environment in the previous study was also confirmed due to compare calculation results to field measurements.

We developed a model for predicting thermal sensation using a neural network (NN) considering secondary comfort factors. This study revealed the following three main points.

1.　The prediction accuracy of the NN model is higher than that of the PMV, and the accuracy is also higher for naturally ventilated conditions.

2.　Although ventilation condition improves the prediction accuracy, this effect disappears when considering outdoor and climatic factors.

3.　While personal factors of age and gender and seasonal factors of date and season improve prediction accuracy, they have little power on prediction when considering climate and other factors.

This study aimed to examine whether residents of Hokkaido can predict heat stroke risk based on cognitive temperature. To determine the same, questionnaire surveys were conducted in four cities in Hokkaido and the thermal environment was measured. A logistic regression analysis of the data was conducted. The results showed that residents were unable to appropriately judge heat stroke risk. Additionally, the results proved that cognitive temperature could be used to judge heat stroke risk at the lower cognitive temperature than the air temperature in Obihiro, Asahikawa and Kushiro.

Based on the assumption of a non-uniform pollutant concentration distribution and stochastic determination of pollutant sources and receptors in indoor space, this study shows how to formulate the expected pollutant concentration observed by the receptors in the presence of an air cleaner, using adjoint concentration and parameters related to probability of pollutants passing through the cleaner. Using this formulation, the structure of the concentration reduction effect of the cleaner and its optimal placement are discussed. The studies with the formulation are also conducted under the assumption of instantaneous uniform diffusion and for a problem in one-dimensional space.

In Japan, where national resilience is required, plans to ensure the safety of people who have difficulty returning home, etc., that occur around stations in major cities have not been investigated so far. In this study, we report the result of investigating the formulation and implementation status of the urban regeneration safety assurance plan. In addition to the contents of the plan and its implementation status, the survey investigated the securing of power sources and information transmission, which were particularly issues at the time of the Great East Japan Earthquake. The survey revealed that planning and implementation were still inadequate.