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Designing with Daylight
Published in Lisa Heschong, Visual Delight in Architecture, 2021
Farther north (or south), on the other hand, twilight has a major presence. In the temperate climates of Southern Europe and most of the United States, at 40 to 50 degrees latitude, twilight, i.e. from sunset to the full darkness of night, lasts for two hours. In many Northern European cities, above 60 degrees latitude, twilight can last from 3.5 hours in the winter to literally all night long in the summer. Colors shift as twilight deepens, but ever so gradually.
Pedestrian safety at urban intersections: lighting conditions is the question
Published in International Journal of Crashworthiness, 2022
Ali Karami, Hossein Karami, Amir Reza Mamdoohi, Mahdieh Allahviranloo
This research employs five years of crash data (the year 2015 to the year 2019) collected in the state of Texas to identify the influence of various parameters on pedestrian-injury severity in various lighting conditions. The effects of lighting conditions are investigated based on data provided by the Texas Department of Transportation (TxDOT) and the National Oceanic and Atmospheric Administration (NOAA). According to data provided by NOAA, the lighting conditions are classified as sunrise, dawn, sunset, and dusk times, which is available for the 365 days of the year in different locations in the United States. For instance, the twilight condition is the period between (astronomical) dawn and sunrise, or between sunset and (astronomical) dusk when the geometric centre of the sun is 6 degrees below the horizon [41]. The daylight condition refers to the period from sunrise to sunset (Figure 1).
The Language of Lighting: Applying Semiotics in the Evaluation of Lighting Design
Published in LEUKOS, 2019
The spectrum will be discussed with regard to color temperature and colored light. Low color temperature reveals a similarity to fire or candlelight, whereas high color temperatures show a close link to daylight. The former can be found in restaurants and hotels for a cozy atmosphere, whereas the cooler light color is more often used as additional lighting to daylight in offices (Krautter and Schielke 2009). When color was taken into account, studies showed that cool material colors such as blue or green were associated with a tranquil effect in contrast to warm material colors like orange and red, which appeared stimulating (Babin et al. 2003; Bellizzi and Hite 1992; Crowley 1993). Associations for colored lighting were linked to natural light with the blue cast of twilight or the orange shift of the sunset and thereby colored light would act as a signifier for the respective atmospheres (Major et al. 2005). The meaning of colors can also be closely connected to local traditions, like the reflectance of daylight on gold or red surfaces in Japan (Plummer 1995). The use of cross-cultural color schemes needs to be carefully evaluated, because both similarities and dissimilarities occur for color meaning associations between different countries (Kress and Van Leeuwen 2002; Madden et al. 2000).
Prediction in Traffic Accident Duration Based on Heterogeneous Ensemble Learning
Published in Applied Artificial Intelligence, 2022
The four time variables of Sunrise sunset, Civil twilight, Nautical twilight, and Astronomical twilight are related to both time and geographic location. We choose the longitude, latitude, month, hour, and minute of the accident as input variables, and also use the KNN method to predict and fill.