Impacts of indoor daylight environments on patient average length of stay (ALOS) in a healthcare facility

Choi, Joon-Ho; Beltrán, Liliana; Kim, Hway-Suh

doi:10.1016/j.buildenv.2011.10.010

Cited by 131 publications

(102 citation statements)

References 7 publications

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“…This might lead to the consideration that the evaluation of visual comfort is not strongly driven by the buildings' intended use itself. Furthermore, the same metrics have been used for assessing visual conditions in different building types such as offices [30,[38][39][40][41], industrial buildings [42,43], commercial buildings or commercial building-like facilities [44,45], schools or universities [46,47], hospitals and healthcare facilities [48][49][50], residential buildings [30,51]. Finally, the European standard EN 12464-1 [52] presents reference values for the amount of light (using illuminance), glare (using Unified Glare Rating), uniformity of light (using Illuminance Uniformity) and color rendering quality of artificial light (using Color Rendering Index) as related rather to the "Type of area, task or activity" [52].…”

Section: Building's Intended Usementioning

confidence: 99%

A review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design

Carlucci

Causone

Rosa

et al. 2015

Renewable and Sustainable Energy Reviews

303

156

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In the last decades, several studies aimed at assessing some specified aspects of visual comfort characterizing the relationship between the human needs and the light environment, such as an available amount of light, light uniformity, light quality in rendering colors, and predicting the risk of glare for space occupants. For each of them, a (still growing) number of indices and metrics have been proposed in literature and standards. In the present work, they are described, categorized according to common features, and finally discussed. As in the case of long-term thermal comfort indices, such visual comfort indices and their summation over a specified calculation period might be used for driving optimization processes to support a more conscious integrated design of buildings. To that purpose, the choice among the available visual comfort indices needs to be informed by an analysis of their features and implications. We present recommendations for use, and suggest areas where improvement is needed for their use in optimization processes to support buildings' design.

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Section: Building's Intended Usementioning

confidence: 99%

A review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design

Carlucci

Causone

Rosa

et al. 2015

Renewable and Sustainable Energy Reviews

303

156

View full text Add to dashboard Cite

show abstract

“…This has led to much discussion of the ratios between the respective costs of producing, maintaining and operating buildings, with the implication that relatively small increases in production costs can leverage much larger savings in maintenance and operation, though reliable ratios remain elusive [35][36][37]. There is evidence of improved healthcare outcomes arising from improved hospital design [38,39]. Such considerations have also led to consideration of the subjective aspects of value and an emphasis on value exchanges between the wide range of stakeholder groups [34,40].…”

Section: Approaches To Through-life Managementmentioning

confidence: 99%

Evaluation of the Promotion of Through-Life Management in Public Private Partnerships for Infrastructure

2016

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Abstract:One justification of public private partnerships (PPP) is the alleged benefit they offer in terms of through-life management (TLM). Aiming at an evaluation of this claim, the dominant reasoning connecting PPPs and TLM is first defined: In creating a single point of responsibility and a long temporal involvement, the PPP model provides an effective incentive to implement TLM. This reasoning is first evaluated through prior large scale studies and through two case studies undertaken by the authors. No substantial evidence of TLM benefits is found. To identify the causes for this gap between intention and achievement, a critical review of the PPP literature supported by insights from management and organization theory is undertaken. Four problems in the reasoning are found to explain the gap: fragmentation is factually prevailing; not all parties in PPPs intend to have a long term commitment to the project; there may be competing incentives for some parties; and the effort to achieve the change and learning necessary for TLM may be missing. It is concluded that for the TLM benefits to be achieved, the PPP model has to be redesigned to secure incentivisation towards TLM and to incorporate TLM mechanisms at the level of the production system.

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“…In other words, without access to daylight (or electric lighting providing comparable amount, spectrum, distribution, duration, and timing), human health and well-being may be compromised. Although daylight may help patients in hospitals or care rooms [19], [20], studies to date have investigated the effect of daylight on patients' outcomes [21], [22], but have not specifically investigated the effects of daylight on the circadian system of occupants in common residential rooms according to window design.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Circadian Stimulus and Visual Comfort Provided by Window Design in Architecture

Acosta¹,

Molina²,

Campano³

2017

IJET

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Abstract-Light is the major synchronizer of circadian rhythms to the 24-hour solar day. Compared to the visual system, the circadian system requires more light to be activated and is more sensitive to short-wavelength light. Daylighting is an ideal light source for circadian entrainment. Architectural and design features, such as window size and room reflectances impact the amount of circadian stimulus that the patient will receive. DaySim 3.2 simulations were used to determine the percentage of days that occupants would receive a minimum circadian stimulation of 0.50 for at least an hour during the morning. According to a phototransduction model of the human circadian system, a circadian stimulation of 0.50 is equivalent to suppressing the hormone melatonin by about 50%. This circadian stimulus criterion is examined for different window to wall ratios, for two average room reflectances, and for four latitudes. The present paper provides an example of a tool that could be used to assist designers in fenestration and interior design.Index Terms-Circadian stimulus, daylight autonomy, visual comfort, window.

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Impacts of indoor daylight environments on patient average length of stay (ALOS) in a healthcare facility

Cited by 131 publications

References 7 publications

A review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design

A review of indices for assessing visual comfort with a view to their use in optimization processes to support building integrated design

Evaluation of the Promotion of Through-Life Management in Public Private Partnerships for Infrastructure

Analysis of Circadian Stimulus and Visual Comfort Provided by Window Design in Architecture

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