Publishing type：Research paper (scientific journal)   Publisher：Illuminating Engineering Society of Japan  

DOI： 10.2150/jstl.ieij190000637

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Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

DOI： 10.3130/aije.86.151

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

DOI： 10.3130/aije.84.29

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Authorship：Lead author   Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

DOI： 10.3130/aije.84.817

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Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

DOI： 10.3130/aije.84.377

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Publishing type：Research paper (scientific journal)   Publisher：Architectural Institute of Japan  

DOI： 10.3130/aije.84.1059

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：SAGE Publications  

A simulation method to determine adaptation luminance is proposed for implementation of the CIE mesopic photometry system. The simulation takes four factors into account: luminance distribution, eye movement of observers, surrounding luminance effect and area of measurement. Each factor is modelled as a two-dimensional geometrical function. The method determines an adaptation luminance for the area of measurement through four calculation steps. The simulation method was applied to examples of luminance distributions of outdoor lit scenes and the results were compared with possible simple predictors of adaptation luminance. The comparisons suggest that the average luminance of the area of measurement can be considered as a good approximation in most of the cases. Exceptions are scenes for pedestrians in which there are many bright sources surrounding the area of measurement.

DOI： 10.1177/1477153515626210

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Other Link： https://journals.sagepub.com/doi/full-xml/10.1177/1477153515626210

Publishing type：Research paper (scientific journal)   Publisher：SAGE Publications  

An experiment was carried out to investigate spatial brightness at photopic levels under lighting of different spectral power distributions. One aim was to replicate the experiment reported in 1990 by Berman et al. demonstrating that light with a higher scotopic / photopic (S/P) ratio would be perceived as brighter. In addition, a third SPD was included to investigate gamut area and two additional procedures were employed to provide concurrent validity of the findings. It was concluded that while lighting of higher S/P ratio was brighter, the S/P ratio alone was insufficient to predict spatial brightness. A metric for the chromatic contribution is also needed, this being provided by gamut area in the current work.

DOI： 10.1177/1477153514542295

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Other Link： https://journals.sagepub.com/doi/full-xml/10.1177/1477153514542295

Publishing type：Research paper (scientific journal)   Publisher：SAGE Publications  

This paper investigates the critical visual tasks of pedestrians, the first step in a review of design guidance for lighting in residential roads. Eye tracking was used to record pedestrians’ visual fixations when walking outdoors in daytime and after dark with a concurrent dual task to better understand which fixations were critical. Fixations at critical instances, these being shown by slow reactions to the secondary task, were categorised into one of eight groups. Of these, the path and other people were the most frequent items, with people more likely to be fixated at a far distance and the path at a near distance. After dark the path was more likely to be fixated and other people less likely to be fixated compared with daylight.

DOI： 10.1177/1477153514522472

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Other Link： https://journals.sagepub.com/doi/full-xml/10.1177/1477153514522472

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.3130/aije.78.111

Scopus

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Language：English   Publishing type：Research paper (international conference proceedings)  

Web of Science

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.2150/jieij.96.81

Scopus

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Language：English  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.2150/jieij.95.711

Scopus

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Language：English  

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.3130/aije.75.255

Scopus

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Language：Japanese  

CiNii Books

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Illuminating Engineering Institute of Japan  

DOI： 10.2150/jieij.94.86

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.2150/jieij.94.108

Scopus

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Illuminating Engineering Institute of Japan  

DOI： 10.2150/jieij.94.429

Scopus

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.2150/jieij.94.735

Scopus

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Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.3130/aije.74.1131

Scopus

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Language：English  

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Language：English  

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Language：Japanese   Publisher：The Illuminating Engineering Institute of Japan (IEIJ)  

Equivalent luminance contrast was investigated as an index that expresses the relationship between color difference and readability of chromatic documents. The relationships between the equivalent luminance contrast and the visual factors were determined. The visual factors are background luminance (which represents adaptation luminance in the visual field with uniform luminance), visual angle of the letters, luminance contrast, and color difference between the letters and the background. For chromatic documents, equivalent luminance contrast was found to be affected by background luminance and the visual angle of the letters. With regard to the various color combinations of background and letters, the relationship between the color difference and equivalent luminance contrast asone of the visual factors was determined. Equivalent luminance contrast was high with a large color difference. Even when there is no color difference, equivalent luminance contrast depended on the direction of the letter color from background color in the CIE1976L<SUP>*</SUP>a<SUP>*</SUP>b<SUP>*</SUP> color space. This directional property was almost the same for all background colors.

DOI： 10.2150/jieij.92.787

CiNii Books

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Other Link： https://jlc.jst.go.jp/DN/JALC/00321293129?from=CiNii

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.3130/aije.73.431

Scopus

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Language：Japanese   Publisher：Architectural Institute of Japan  

Recently, the global environment has many serious problems in the world. These problems are also serious in architectural field. In this research, in order to clarify attitude of students to the global environment, questionnaire was carried out. Contents of the questionnaire were mainly "consciousness", "action" and "knowledge". Subjects were university students majoring in architectural field, and their grade was both the first and third. As a result, subjects were aware that the global environment problems were serious, but they did not behave for the global environment so much. The higher their grade was, the more their knowledge was, however their consciousness and action hardly changed. Furthermore, the students scarcely knew that the change of global environment brought a great influence on creatures. It is important to inform the students of the current state of the global environment, and to train the dignity of the life.

DOI： 10.3130/aija.72.207_2

CiNii Books

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Other Link： http://www.aij.or.jp/paper/detail.html?productId=176769

Language：Japanese   Publisher：Architectural Institute of Japan  

It is shown that the kind of the scene through the window and its brightness influence occupant's rating related to the brightness in the rooms. The relationship between combinations of the various lighting design indexes used for the utilization of daylight and the brightness of the room are found out by the subjective experiment with scale model. The model of the room has a window. The scene through it is composed by the sky, a building and trees. Brightness of the interior, brightness of the exterior, the balance of them and the balance of interior brightness are rated by subject. The lighting design indexes, such as illuminance at the front of face, average luminance of interior and exterior, and the ratio of them, couldn't explain the ratings of the room. It is not suitable, like the present, to make the sum of the illuminances by the daylight and artificial light the design index of the lighting environment.

DOI： 10.3130/aije.72.9_3

CiNii Books

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Other Link： http://www.aij.or.jp/paper/detail.html?productId=18052

Language：English   Publisher：The Illuminating Engineering Institute of Japan  

The main purpose of coloring an object is to add information and to draw attention to it. However, the visibility of the visual object must not be spoiled by taking these effects too seriously. It is thought that explaining the influence of color on the visibility of an object is useful to show the effect of coloring except for the visibility after securing the visibility of a visual object. The final goal of this research is to show the establishment of visual environment design based on the visibility of chromatic object, and tries to explain the influence on the visibility of the color quantitatively. This paper shows the results of the subjective evaluation experiment. The experiment has various conditions systematized by color difference (lightness, chroma and hue under the CIELAB color system). The readability of chromatic documents was understood by focusing on the color difference as an index that shows the degree of influence of the color on visibility quantitatively. This paper shows the relationship between the color difference and the equivalent luminance contrast that is proposed by the authors to discuss the influence of the color easily.

DOI： 10.2150/jlve.30.18

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Language：English   Publisher：Illuminating Engineering Institute of Japan  

The purpose of this study is to obtain data based on the readability of chromatic documents for use in visual environment design. That data would seem to be the same as the existing data based on the readability of achromatic documents. Experiments are undertaken in order to clarify the influence of color on readability. The results show that the same CIELAB color difference does not have the same influence on readability. In addition, it is thought that the equivalent luminance contrast is invariable irrespective of the size of a letter and is instead determined by the combination of the colors of the letters and the background. It is suggested that the readability of chromatic documents can be estimated by using the equivalent luminance contrast and the existing relationship between the visual factors and readability of achromatic documents.

DOI： 10.2150/jlve.27.165

CiNii Books

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Other Link： https://jlc.jst.go.jp/DN/JALC/00234256013?from=CiNii

Language：English   Publisher：Kansai University  

CiNii Books

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Language：English   Publisher：Kansai University  

CiNii Books

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Language：Japanese   Publisher：Architectural Institute of Japan  

The survey on the visual environment in the lecture room was carried out to clarify the actual state and the problem in the use of the visual apparatuses such as slide projector and overhead projector. This paper shows the result about the actual state of the elements related to visibility of pictures projected by visual apparatuses. The surveyed elements are selected, that compose the visual factors, namely, visual angle, background luminance and luminance contrast of the visual target. These elements are the rooms, the luminaires, the equipment to reduce daylight, the apparatuses to project the picture as a visual target, the original pictures that are projected on a screen by overhead projector and so on.

DOI： 10.3130/aija.65.1_1

CiNii Books

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Other Link： http://www.aij.or.jp/paper/detail.html?productId=172563

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Language：Japanese   Publisher：Architectural Institute of Japan  

To realize a suitable visual environment in the room in which much information is transmitted using an overhead projector, it is important to identify the conditions of three visual factors (size, background luminance and luminance contrast) of a projected picture under a given situation. The effects of the condition of an original picture, a projector and operation on the characteristics of the projected picture are examined through an experiment in an actual situation. According to results of the experiment, some variables of a projector performance useful for deriving the size of a projected picture and the illuminance on the screen are specified. The calculation formulae to estimate three visual factors of a projected picture are presented. These formulae are composed of instrumental performance variables and the conditions of original picture, lighting and operation.

DOI： 10.3130/aija.62.17_2

CiNii Books

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Other Link： http://www.aij.or.jp/paper/detail.html?productId=170976

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

DOI： 10.11515/ieijac.41.0.33.0

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Publishing type：Research paper, summary (national, other academic conference)  

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Publishing type：Research paper, summary (national, other academic conference)  

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Language：Japanese   Publisher：Architectural Institute of Japan  

CiNii Books

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Publishing type：Research paper, summary (national, other academic conference)  

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Language：Japanese   Publisher：Architectural Institute of Japan  

CiNii Books

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Language：Japanese   Publisher：Architectural Institute of Japan  

CiNii Books

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Language：Japanese   Publisher：The Illuminating Engineering Institute of Japan (IEIJ)  

CiNii Books

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Language：Japanese   Publisher：The Illuminating Engineering Institute of Japan (IEIJ)  

CiNii Books

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Language：Japanese   Publisher：Architectural Institute of Japan  

CiNii Books

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Language：Japanese   Publisher：Architectural Institute of Japan  

CiNii Books

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Venue：China  

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Venue：Japan  

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Venue：Argentina  

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Venue：China  

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Venue：China  

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Venue：China  

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Venue：Australia  

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Venue：Australia  

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Venue：Japan  

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Venue：USA  

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Venue：USA  

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Venue：Poland  

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Venue：Poland  

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Venue：Japan  

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Venue：Japan  

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