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A theoretical approach for therapeutic artificial supplementary lighting in elderly living spaces

机译：老年生活空间治疗人工补充灯具的理论方法

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Depression is a leading cause of disability and death worldwide. Due to physiological and psychological degeneration, the elderly suffer from an increased risk and incidence of depression. Light therapy (LT), a non intrusive approach for treating depression, exerts powerful effects on emotional and cognitive disorders, and can thus be installed in elderly living spaces (ELSs) in order to provide daily intervention that prevents the occurrence of the early phase of depression, delays its development, and promotes rehabilitation over its entire course. LT requires specific thresholds of light intensity, exposure duration, exposure time, and spectrum. The high incidence of seasonal affective disorder (SAD) triggered by daylight deprivation (caused by seasonal solar variation) suggests that daylight is insufficient for stable LT. Thus, custom-designed supplementary artificial lighting is needed.In this work, based on literature review and a synthesis of the light patterns related to antidepressant efficacy, visual comfort, and visual characteristics of the elderly, we recommended a set of a priori technical thresholds for light therapy installations in ELSs. Accordingly, using Radiance with Chengdu as a study case, we calculated the quantity and distribution of daylight and compared supplementary artificial lighting from the ceiling (horizontal lighting) and walls (vertical lighting), finding that vertical lighting is more advantageous in terms of both uniformity and energy efficiency for creating a lighting environment for daily light intervention in ELSs. This study introduces a theoretical approach for therapeutic lighting design, and the conclusions can provide technical guidance for applying light therapy in ELSs.
机译：抑郁是全世界残疾和死亡的主要原因。由于生理和心理变性，老年人患有抑郁症的风险和发病率增加。光疗法（LT）是一种治疗抑郁症的非侵入性方法，对情绪和认知障碍产生强大的影响，因此可以安装在老年生活空间（elss）中，以便提供每日干预，以防止发生早期阶段的发生抑郁症，延误其发展，促进整个课程的康复。需要特定的光强度，曝光持续时间，曝光时间和频谱的特定阈值。日光剥夺触发的季节性情感障碍（悲伤）的高发病率（由季节性太阳能变化引起）表明日光不足以稳定。因此，需要定制设计的补充人造照明。在这项工作基础上，基于文献综述和与老年人的抗抑郁效果，视觉舒适度和视觉特征相关的轻型模式的合成，我们推荐了一套先验的技术阈值在elss中的光疗装置。因此，利用成都作为研究案例的辐射，我们计算了日光的数量和分布，并与天花板（水平照明）和墙壁（垂直照明）进行了比较的补充人造光照，发现垂直照明在均匀性方面更有利为elss创造日常光线干预的照明环境的能源效率。本研究介绍了治疗照明设计的理论方法，结论可以为elss应用轻疗法提供技术指导。

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