Browsing by Author "Jalali, Mansoureh Sadat"

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    Development of a Novel Architectural Design Framework for Supporting Occupants' Healthy Circadian Rhythm in Interior Spaces
    Jalali, Mansoureh Sadat (Virginia Tech, 2023-08-08)
    Approximately 300 years ago, French astronomer, Jean Jacques became the first individual to scientifically observe circadian rhythm. Since then, a great deal of study has been conducted, and its findings demonstrate that every human action, including digestion, sleep and waking hours, hormone release, blood pressure, and body temperature, is controlled by a physiological mechanism. More critically, any modification to this clock may have an impact on a person's immune system. The sun's rays are diffused in the sky and contain all the required wavelengths to enable the regular stimulation of the circadian rhythms of humans, animals, and plants. People's health and well-being will be supported if they have adequate access to daylight. However, given the changes in the way of life of modern humans, this is not possible. Additionally, as the human circadian rhythm is greatly influenced by the short wavelengths of the visible light spectrum, the process of LEDification would increase human exposure to LEDs blue light, which might negatively affect their health and well-being. This research involves the development of a new architectural design framework to evaluate and support the process of creating lighting systems that maintain human healthy circadian rhythm. This process develops a model consisting of key decisions made in each stage of the design process and related knowledge domains to successfully integrate dynamic lighting techniques into the building design. The process explains the role of each member, the essential tools, and the flow of the decision-making process.
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    Human-Centric Lighting Design: A Framework for Supporting Healthy Circadian Rhythm Grounded in Established Knowledge in Interior Spaces
    Jalali, Mansoureh Sadat; Jones, James R.; Tural, Elif; Gibbons, Ronald B. (MDPI, 2024-04-17)
    Over the past 300 years, scientific observations have revealed the significant influence of circadian rhythms on various human functions, including sleep, digestion, and immune system regulation. Access to natural daylight is crucial for maintaining these rhythms, but modern lifestyles often limit its availability. Despite its importance, there is a lack of a comprehensive design framework to assist designers. This study proposes an architectural design framework based on the review of literature, lighting-related codes and standards, and available design and analysis tools that guides the creation of lighting systems supporting healthy circadian rhythms. The framework outlines key decision-making stages, incorporates relevant knowledge, and promotes the integration of dynamic lighting techniques into building design. The proposed framework was presented to a group of design professionals as a focus group and their feedback on the relevance and usability of the tool was obtained through a survey (n = 10). By empowering designers with practical tools and processes, this research bridges the gap between scientific understanding and design implementation, ensuring informed decisions that positively impact human health. This research contributes to the ongoing pursuit of creating lighting environments that support healthy circadian rhythms and promote human well-being.