Seung Hyun Cha

Korea Advanced Institute of Science and Technology | KAIST · Graduate School of Culture Technology (GSCT)

The photo-based immersive virtual environment (IVE) has become an increasingly popular method to deliver spatial experiences because it provides users with a high sense of presence and interactivity. However, there is still a lack of empirical evidence on the degree of realism of spatial experiences. Thus, the present study aims to investigate the...

In recent decades, smart home technology has advanced, improving the well-being and quality of life of its users. Thus, its applications have expanded, particularly in health and environmental monitoring. Numerous devices have been developed to accommodate user requirements of monitoring; however, the adoption of monitoring devices is closely relat...

In recent decades, immersive virtual environments (IVEs) have enabled users to experience various lighting scenarios with a high sense of presence and immersion, thereby having the potential to simulate office lighting design. To realistically experience lighting design cases in IVE lighting simulations, the CCT and illuminance levels should be acc...

Given the growing environmental concerns due to climate change, the combination of renewable energy systems and feasible design optimization strategies of buildings, has been considered as a promising integrated solution to promote sustainable residential infrastructure and maintain carbon emission reductions. As part of promoting sustainable resid...

Optimizing the building performance at the early design stage is justified as a promising approach to achieve many sustainable design goals in buildings; in particular, it opens a new era of attractive energy-efficient design for designers and architects to create new building constructions with high-energy efficiency and better overall performance...

In urban environments, decentralized energy systems from renewable photovoltaic resources, clean and available, are gradually replacing conventional energy systems as an attractive source for electricity generation. Especially with the availability of unexploited rooftop areas and the ease of installation, along with technological development and p...

An integrated smart home system (ISHS) is an effective way to improve the quality of life of the elderly. The elderly’s willingness is essential to adopt an ISHS; to the best of our knowledge, no study has investigated the elderly’s perception of ISHS. Consequently, this study aims to investigate the elderly’s perception of the ISHS by comprehensiv...

To plan successful activity-based workplaces (ABW), architects need to clearly understand user-specific activity patterns through the accurate recognition of user activity. Because user activity is closely associated with space, equipment, and users, such diverse activity-related information should be essentially considered for accurate activity re...

Accurate face-to-face interaction estimation is required for a successful data-driven design in workplaces. In previous studies, various sensor-based interaction estimation methods which use proximity and speaking data have been developed. However, these data alone cannot confirm the presence of interactions because non-interacting users also engag...

The purpose of this study was to investigate the effects of interior color schemes in immersive virtual environments (IVEs) on emotion, task performance, and heart rate to examine IVEs' potential for interior color research. Fifty‐five (n = 55) student participants were recruited to experience four different colored IVE models (i.e., red, green, bl...

Since a traditional centralized control system (e.g., building energy management system) with a fixed schedule and manual control is not appropriate to irregularly occupied rooms, it is expected to have a large amount of energy saving potential in operating the HVAC system. To overcome this challenge, this study aimed to develop a novel operation a...

Building energy prediction techniques are the primary tool for moving towards sustainable built environments. Energy prediction models play irreplaceable roles in making energy policy and the development of the building sector. This paper presents a comprehensive review of the prevailing prediction techniques used in large-scale building energy app...

This erratum is published to notify a correction in figure 1 and the addition of a citation, Du et al. 2016. See the corrected version below:

Though computer-mediated communication technologies such as immersive virtual reality (IVR) have recently shown considerable promise, their effectiveness as methods of communication among the participants in construction projects has yet to be systematically investigated. This study helps fill this gap via a detailed comparison of traditional face-...

This empirical study sought to validate the spatial-choice modelling approach to user simulation. This validation is challenging, because spatial-choice behaviour is difficult to observe in real-life settings. To overcome this challenge, the study assembled 1137 activity cases from time-use diaries kept by university students and then extracted 74...

End-user participation during the design review plays an important role in improving the quality of building products. For a long while it has been constrained by the complexity of design information requiring architectural expertise to be clearly understood. Recent advances in virtual reality technology, such as the HMD-based immersive virtual env...

Traditional methods of communication in the construction are changing, notably due to advancements in computer-mediated communication technologies such as immersive virtual reality (IVR), which can provide new opportunities for long-distance communication among stakeholders. Despite this, little research has examined whether or how far IVR-based vi...

This study proposes a conceptual framework for the real-time monitoring and diagnostic system for the optimal operation of smart building, focusing on the energy-efficient, occupant-oriented, and comfortable indoor environment. The proposed framework aims to improve the energy efficiency in a room of building while achieving the healthy and comfort...

There has been growing interest in the distributed solar generation (DSG) system in accordance with the ‘Post-2020 Climate Change Agreement', especially for the reduction of greenhouse gas emissions from buildings. In this respect, this study aimed to develop an integrated model for estimating the techno-economic performance of the DSG system on bu...

The accurate prediction of occupancy during the design phase of a building helps architects to improve space efficiency by eliminating the possible under-utilization and over-crowding of space during the design use phase. However, existing models exhibit limited accuracy in occupancy prediction. A major reason for this limitation is that spatial-ch...

Space attributes concern both users’ space-choice behaviour (i.e. where to sit) and satisfaction (i.e. level of satisfaction in the chosen seat). However, the effects of space attributes in academic libraries have most often been investigated with a separate focus on either space-choice behaviour or user satisfaction. Since library contexts vary gr...

People have negative perceptions of underground environments on account of the absence of natural elements. To alleviate negative perceptions, many investigators have proposed indoor plants and artificial windows. Although a few studies have provided quantitative evidence of the benefits of indoor plants and artificial windows in an otherwise windo...

Accurate space-use prediction helps architects to optimise space efficiency in buildings, thereby achieving economic and environmental sustainability. However, current space-use prediction models and approaches either disregard or oversimplify the role of building users’ space preferences in spatial-choice behaviour, thereby compromising prediction...

Accurate space-use prediction helps architects to optimize space efficiency in buildings, thereby achieving economic and environmental sustainability. However, current space-use prediction models and approaches either disregard or oversimplify the role of building users’ space preferences in spatial-choice behaviour, thereby compromising prediction...

Architects can hardly evaluate and compare different user involvement methods and choose appropriate ones for their projects unless they have a framework that connects theoretical concepts of user involvement with practical methods. This paper seeks to develop such a framework that satisfies the following four characteristics: (1) architectural, en...

Size of building has a direct relationship with building cost, energy use and space maintenance cost. Therefore, minimizing building size during a project development is of paramount importance against such wastes. However, incautious reduction of building size may result in crowded space, and therefore harms the functionality despite the fact that...

Detailed space use analysis for a building is needed in the near future for building energy efficiency and effective space planning. In this regard, the development of an indoor spatial choice model is indispensable for better space use prediction. However, research efforts into the model are still insufficient in this area. As an initial study, th...