A preliminary study of an evaluation method for discomfort glare due to light trespass

2016 ◽  
Vol 49 (5) ◽  
pp. 632-650 ◽  
Author(s):  
YJ Sim ◽  
IT Kim ◽  
AS Choi ◽  
MK Sung
Keyword(s):  
Evaluation Method ◽  
Discomfort Glare ◽  
Preliminary Study

31.4: A Preliminary Study on the Frame Glare by Reflected Light for its Allowable Level and Evaluation Method

2011 ◽  
Vol 42 (1) ◽  
pp. 420-423
Author(s):  
Yuzo Hisatake ◽  
Naoaki Umezu ◽  
Chiaki Kato ◽  
Yoshihiko Nakano
Keyword(s):  
Evaluation Method ◽  
Reflected Light ◽  
Allowable Level ◽  
Preliminary Study

scholarly journals The Development Of Brigthness Evaluation Method For Digital Billboards

2021 ◽  
Vol 1202 (1) ◽  
pp. 012035
Author(s):  
Gunta Krumina ◽  
Liva Volberga ◽  
Gatis Ikaunieks ◽  
Lauris Naumovs
Keyword(s):  
Road Safety ◽  
Evaluation Method ◽  
Low Cost ◽  
Assessment Method ◽  
New Method ◽  
Potential Threat ◽  
Discomfort Glare ◽  
Low Sensitivity ◽  
Digital Billboards ◽  
Glare Effect

Abstract LED-based billboards are becoming increasingly popular due to their low cost, flexibility, and efficiency. On another side, the too-bright digital billboard may pose a potential threat to road safety. The driver’s perception of advertising depends on the different factors, including the billboard’s luminance value. The aim of the study was to develop the assessment method for the digital screen parameters (luminance or illumination) which could be applied by supervising authorities, using budget-friendly devices, such as a lux meter and could be used during the billboard active operation. We tested the recommended method of OAAA and concluded that it is not applied for large billboards (over 25 square-meter) due to the calculated far distance and low sensitivity of lux meter. We have developed the new method based on driver discomfort glare and De Boer ratio. The ratio helps to determine how likely a display is to cause discomfort to those around it. The lower the value, the less discomfort the driver will experience from the billboard. The new method is applied for the active and different size billboard and using lux meter that is not an expensive device. Moreover, we take into account the glare effect of billboard on drivers’ vision.

Preliminary Study on a New Evaluation Method of Concrete Cracking Resistant Behavior

2008 ◽  
Vol 400-402 ◽  
pp. 459-463
Author(s):  
Tao Ji ◽  
Chang Bin Hu ◽  
Yong Ning Liang
Keyword(s):  
Evaluation Method ◽  
Polypropylene Fiber ◽  
Time Span ◽  
Early Age ◽  
Cracking Behavior ◽  
Concrete Cracking ◽  
Expansive Agent ◽  
Preliminary Study ◽  
Compressive Strength Of Concrete ◽  
Restrained Ring

A restrained ring setup with a clapboard was developed. Because the clapboard can cause a stress concentration of concrete annulus placed in the ring setup, a crack of the concrete annulus can rise at the tip of the clapboard at an early age of curing. Then the time-span of the evaluation of concrete cracking behavior is shortened. The new evaluation method can avoid the disadvantages of applying the conventinal restrained ring setup without a clapboard when evaluating the cracking resistant behavior of concrete, such as the longer time-span, randomicity and chanciness of concrete cracking. Based on experimental data, in which the effect of polypropylene fiber and expansive agent on the cracking resistant behavior of concrete was investigated, the cracking age of concrete loops and the ratio of tensile strength to compressive strength of concrete were obtained, and the validity of the proposed ring setup has been verified.

scholarly journals EVALUATION METHOD OF DISCOMFORT GLARE OF LED TUNNEL INTERIOR LIGHTING

2019 ◽  
Author(s):  
Satoshi Hirakawa ◽  
Akira Tamoto ◽  
Shigeki Takamoto ◽  
Takashi Muraki ◽  
Hayato Ito
Keyword(s):  
Evaluation Method ◽  
Interior Lighting ◽  
Discomfort Glare
Sign in / Sign up

Export Citation Format

Share Document