Browsing by Author "Ulusoy, B."

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Open Access
Analysis of residential lighting in Poland: results from a winter term survey
(2021-09-01) Pracki, P.; Aslanoğlu, R.; Kazak, J. K.; Ulusoy, B.; Yekanialibeiglou, Sepideh
In 2020, an international project on residential lighting started and was implemented in four countries (Poland, Sweden, UK and Turkey). This article presents the results of a survey carried out in Poland, in the winter term between November 2020 and January 2021. A total of 125 Polish residents (59 women, 65 men, one person did not wish to specify gender) participated in the survey. A variety of data was collected on the respondents and their assessments as well as on their satisfaction with day- and artificial lighting in residential living spaces. The results from questionnaires were analyzed with STATISTICA 13.3. Descriptive statistics and Spearman rank order correlations were adopted to identify the light-related aspects, lighting patterns, and respondents’ perception of day- and artificial lighting conditions in living areas. The results revealed that satisfaction with daylighting in the living area, both in summer and winter, was significantly correlated with daylighting level, daylighting uniformity, sunlight exposure and view-out. The results also revealed that satisfaction with artificial lighting was significantly correlated with artificial lighting level, artificial lighting uniformity and color rendering. The results provide valuable information on lighting and factors that influence the luminous environment in residential living spaces.
Open Access
Colour semantics in residential interior architecture on different interior types
(Wiley, 2020-04) Ulusoy, B.; Olguntürk, Nilgün; Aslanoğlu, Rengin
Colour meaning is a challenging decision in interior architecture during the design process; however, specific meanings within different interior types have not yet been investigated. This study explored colour meaning in the context of residential interior types (eg, bedroom) under controlled conditions using 42 Munsell colours varying in hues, value, and chroma levels, with 14 adjectives (eg, comfortable, pleasant). The results demonstrate that some colours convey the same meanings (eg, vulgar) regardless of type of room; however, others (eg, beautiful) tend to require more complicated and sophisticated colour applications in different residential interiors. The study findings proved that colour meaning in RITs can be affected by all colour attributes. All colours that are named orange and red are selected for both negative and positive meanings. Colours that are named purple are selected less and only for negative connotations. The findings present an overall colour meaning guide for these residential interior types, which will be beneficial for decision makers (interior architects, designers, users) and colour researchers.
Open Access
Effects of color pairs on warmth perception in interiors
(Society for Imaging Science and Technology, 2016-09) Ulusoy, B.; Olguntürk, N.
Warmth perception is a physical, emotional, semantic, and sensorial bond between people and their environments. Although the effects of single colors have been explored, there has been no research on how paired colors affect warmth perception in interiors. Therefore, the main aim of this study is to investigate these effects of colors and color pairs. Each model was assessed by 32 participants, totaling 96 different participants assessed the color models (Red, White, Green, and their pairs) under controlled conditions, both on a seven-point semantic differential scale and through open-ended questions. The results show that both single colors and paired colors affect warmth perception in interiors. White, Green, and Red are warmer than each other, respectively. Red appears to increase and White appears to decrease the warmth perception of their pairs in interiors. Another important finding of the study is that there is no effect of color location in paired colors. © Society for Imaging Science and Technology 2016.
Open Access
Effects of material pairs on warmth perception in interiors
(Society for Imaging Science and Technology, 2018) Ulusoy, B.; Olguntürk, Nilgün
The study is the second part of a previous study which explored the effects of color pairs on warmth perception in interiors. The main aim of this study is to investigate the effects of material pairs and their single materials on warmth perception in interiors with the same methodology, since paired materials have not been investigated yet. Each material pair and their two single materials were assessed by 32 different participants, thus 96 different participants assessed three groups of material models (Fabric and Timber material pair, Fabric and Plasterboard material pair, Timber and Plasterboard material pair, and their single materials) under controlled conditions. Results indicated that as single materials Timber and Fabric have the same level of warmth and are warmer than Plasterboard whereas there is no difference between their pairs. Findings revealed that these two natural materials are perceived to be warmer than the artificial one and pairing them on interior walls provides similar level of warmth.
Open Access
Pairing colours in residential architecture for different interior types
(John Wiley & Sons, 2021-03-09) Ulusoy, B.; Aslanoğlu, Rengin
Most colour studies focus on single colour effects; however, interiors are multi-coloured environments and contemporary users are looking for more innovative colour schemes in interiors. Interior architects rely on their own subjective experience and instincts when they take up the challenge. This study aims to reveal colour semantics of paired colours on walls for different residential interior types (eg, living room) as a second part of the previous study conducted by the same authors. Both studies explore colour semantics through 42 Munsell colours (with variety of hues, value, and chroma levels) with 14 adjectives (eg, beautiful, unpleasant, cold) under controlled conditions. The predecessor study had explored single colour meanings, however, in this study, participants were asked to pair colours for the same residential interior types on the same semantic scales. Thus, its results can be compared to single colour data on different residential interior types through same methodology and participants. Results reveal that all colour attributes affect semantics paired wall colours. Orange is associated with negative meanings more whereas yellow hue induces positive meanings more for all adjective pairs, except cold-warm and feminine-masculine. For positive association, lighter colours and less saturated colours are selected more compared to saturated and darker colours. Comparing results of single colour study and the current study reveals that pairs cannot be anticipated through single colours for all residential interior types and adjectives, and positive adjectives tend to require different colours than their single associations in their pairs.
Open Access
Short-term analysis of residential lighting: A pilot study
(Elsevier BV, 2021-06) Aslanoğlu, R.; Pracki, P.; Kazak, J. K.; Ulusoy, B.; Yekanialibeiglou, Sepideh
Lighting is one of the environmental elements that facilitates people to maintain their lives. With light people can collect visual cues about their environments in which they can perform visual tasks safely and comfortably. Exploring the lighting systems and conditions in residential interiors is important for introducing new concepts concerning human visual comfort. The study aimed to collect data and conduct a short-term analysis about residential lighting which will be a part of a more comprehensive research. The study focused on day- and artificial lighting systems, conditions and people’s assessments in interiors of residential buildings. An internet-based survey was distributed in July-August 2020 through Google Survey across Poland, Turkey, the U.K. and Sweden in the native languages of each country. 29 adult females and 31 adult males voluntarily participated in the present study. The study identified several interconnected factors related to residential lighting and explored them in detail. Large percentage of the respondents were satisfied or very satisfied with daylighting quality in summer (86.7%) and artificial lighting quality (78.4%) in their living areas. The amount and uniformity of lighting were the most effective cues connected with the respondents’ satisfaction. Reasonable and promising outcomes that were found can be used in generating new and comprehensive data about lighting quality in residential buildings.
Open Access
Understanding responses to materials and colors in interiors
(Wiley, 2017) Ulusoy, B.; Olguntürk, N.
This article investigates the free associations of materials and colors in the context of interior architecture. Materials and colors rarely appear alone in interiors; therefore, in the scope of this study, the researchers explored material pairs and color pairs in addition to single materials and single colors. To elicit free associations from these interior design elements, 192 randomly selected volunteers participated in an experiment using a group of material (fabric, timber, plasterboard) and color (red, green, white) models under controlled conditions. The results contribute to an increased understanding of the associations between the concepts of materials and colors in interiors. While, each model was associated with sensory descriptors, only some models were associated with symbolic or affective descriptors. Single materials were related to different descriptors in interiors on their own, but when they were paired they were associated with fewer affective descriptors. The results showed that color pairs were always associated with all types of descriptors with an exception of red and green color pair, which was not mentioned with affective descriptors. The study findings are expected to be beneficial for interior architects, architects, product designers and researchers who want to shape and investigate a user's experience of interiors. © 2016 Wiley Periodicals, Inc. Col Res Appl, 42, 261–272, 2017. © 2016 Wiley Periodicals, Inc.