This study examined the occupants’ psychological response to rooms with windows and potted plants and their relation to occupants’ eye movement. Twenty-four students performed tasks under six experimental conditions that combined two window conditions and three plant conditions. The coexistence of windows and plants on desks most improved room impressions and was associated with the highest ratings in ease of relaxing and ease of creative activity. In addition, the gaze analysis showed the impression of the space with windows and plants related to the characteristics of eye movements in terms of visual exploration, number of fixations, and average fixation durations.

The working space environment has a large impact on workers. To improve workplace productivity, it is important to design the office environment. In this paper, we focused on radiant air conditioning, which is attracting increasing attention for use in offices. The purpose of this study was to determine the differences in indoor environment between radiant air conditioning and convective air conditioning and evaluate their effects on workplace productivity by conducting subject experiments.

Radiant air conditioning was found to reduce differences between deep body temperature and terminal skin temperature and to improve creative work performance compared with convection air conditioning.

The purpose of this study is to examine the applicability of CG images reproducing detailed urban greenery in the evaluation of river landscape. The acquisition of greenery information was based on drone technology and deep learning. We obtained information on the height and location of greenery. In addition, regarding physical indices and psychological evaluation, we examined the coincidence between CG images and photographs. As a result, we were able to obtain the data that could express the shape of individual trees and match photographs with a high degree of accuracy in the psychological evaluation items related to shape.

The purpose of this paper is to evaluate the thermal insulation performance of insulation foams with complicated shape. Measurements were conducted on several irregularly shaped insulation foams with slit-like shaped deficits according to the calibrated hot box method and CFD analysis was performed to reproduce this measurement situation. It was confirmed that the difference in the method of dividing the radiation calculation surface elements on the sides of the slit affects the amount of heat that passes through the specimen. Both the measured and analyzed thermal resistance of the specimen decreased as the volume loss ratio increased.

In order to extract the factors that influence the customers’ evaluation on men’s restrooms in railway stations, we conducted surveys on consciousness of railway customers about cleaning status at men’s restrooms in railway stations. Statistical processing of the survey results revealed that two indicators: “odor satisfaction,” “urine stains on skirting boards,” influence the users’ evaluation of whether they would like to use this restroom again. It also became clear that men’s restrooms with dry cleaning in railway stations had statistically significantly better evaluations than men’s restrooms with wet cleaning in railway stations from the viewpoint of odor.

The thermal environment of a house is a factor that affects sleep quality. Thus, for maintaining good health, it is important for houses to have an appropriate thermal environment. The influence of ventilation and air conditioning on a house’s thermal environment cannot be ignored. Here, we investigated differences in ventilation and air conditioning equipment by comparing and evaluating the sleep quality of residents using individual air conditioners or central air conditioning. The results suggested that the central air conditioning group had reduced sleep latency, which might increase sleep efficiency in summer.

We verified the basic performance of the circuit-type double skin, which uses air-conditioning exhaust from the subject building and adjacent building, based on unsteady CFD analysis. Furthermore, we proposed the control method to improve the dynamic actual operation performance of this double skin and clarified its effectiveness by unsteady CFD analysis. Following results were obtained.

1. Air temperature in double skin was stabilized and heat-load was reduced by cascade use of air conditioning exhaust.

2. Introduction of the proposed optimal control method further improved the reduction effect of the thermal transmission load.

The advantage of multi-split packaged air-conditioning system is high operational flexibility and energy efficiency. However, since adjacent indoor units affect each other, the control becomes complex and can cause the deterioration of indoor thermal environment and the increase of energy consumption. Therefore, we propose the cooperative control method that combines MIMO MPC and sparse modeling, here referred to as Sparse MPC, and to verify the proposed method. The results confirmed that Sparse MPC reduces the air conditioning operating time and the number of units in operation. This suggests that Sparse MPC may improve the energy efficiency of air conditioning systems.

This study investigated the influence of mastery experiences on subjective happiness. Path analysis for the hypothetical model revealed that learning behavior is strongly linked to mastery experiences and that a good neighborhood environment is not only linked to learning behavior but also directly linked to mastery experiences. It was shown that the increase in mastery experiences improves subjective happiness through the improvement of work engagement, and wisdom. The results of the multiple group modeling suggest that the neighborhood environment is important in enhancing the mastery experience for each of the female group and the remote-workers group.

To provide employees with thermal satisfaction and improve workplace productivity, subjects were studied during a cooling period in an office room temperature modulation protocol that takes into account aspects of human circadian rhythm. The following findings were obtained in this paper. Task performance was improved by setting the room temperature 1℃ lower than 27℃ during morning hours and after lunch. Sleepiness tended to be ameliorated by setting the room temperature 1-2℃ lower than 27℃ during postprandial working hours. No correlation was found between room temperature and task performance, even when the temperature was increased in the evening.