Browsing by Author "Yekanialibeiglou, Sepideh"
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Item Open Access An international survey on residential lighting: Analysis of summer-term results(Elsevier, 2023-01-09) Aslanoğlu, Rengin ; Kazak, J. K.; Yekanialibeiglou, Sepideh; Pracki, P.; Ulusoy, BegümObtaining visual comfort, satisfaction and well-being in residential interiors are now becoming more important, especially in times of extreme events such as the COVID-19 pandemic. It also became important to collect users' evaluations and their own solutions for residential lighting in order to improve the current lighting conditions. For this aim, with a group of international and inter-disciplinary researchers, a comprehensive study was conducted. This study is the last part of a three-stage investigation aimed at increasing our knowledge of the current lighting conditions in residential areas during and after the COVID-19 pandemic. For the current study, an online survey and in-depth interviews were conducted between June and August 2022 in Poland, Turkey, Sweden, and the U.K., with 520 participants. As results of this study show, a correlation was found between daylight satisfaction and its sufficiency. Similar correlations were found between artificial lighting satisfaction, its sufficiency, and its uniformity. The differences between seasons were detected for being very satisfied with daylight quality. Also, the correlation between satisfaction with daylighting and the ratio of windows showed difference among seasons. Stronger correlations between satisfaction with artificial lighting, its sufficiency and uniformity were found in summerterm according to winter-term results. Correlations between artificial lighting brightness – CRI and uniformity weakened in summer-term. Results from open-ended questions and in-depth interviews showed, removing the shading device and augmenting the characteristics of artificial lighting were the mostly done adjustments during the COVID- 19 pandemic. The most prominent theme is visual comfort according to the in-depth interview responses.'Item 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, SepidehIn 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.Item Open Access Enhancing creativity in activity-based offices: A critical incident study of knowledge workers(Life Science Publishing, 2021-10-18) Yekanialibeiglou, Sepideh; Demirkan, Halime; Denti, LeifThis study investigated the effects of activity-based offices (ABOs) on individual and group creativity. Adopting an interactionist perspective, we extended the theoretical framework of creative knowledge environments to find the link between ABOs and the concept of creative spaces. We employed the critical incident technique and collected data through interviews and participant observation methods for the case studies of three ABOs. The results show that privacy, noise level, and a distraction-free environment were the main factors supporting employees' individual creativity, as were open spaces with zones for different levels of noise and private enclosed spaces. For group creativity, the significance of providing suitable equipment and furniture in ABOs was observed—collaborative and disengaged spaces were found to be the recurring spaces for group creativity. Additionally, employee preferences were noted as an important component to consider when looking at environmental features, types of spaces and types of creative activities in creativity-enhancing ABOs.Item Open Access Influence of activity-based office environments on perceived individual and group creativity(Bilkent University, 2021-08) Yekanialibeiglou, SepidehThis study examined the impact of activity-based offices (ABOs) on individual and group creativity from the employees' perspective. The study was investigated in two stages to find the link between ABOs and the concept of creative spaces, and also to identify and examine mediating variables in this relationship. In the first stage, a qualitative approach was adopted and the critical incident technique was used to collect data from 50 knowledge workers through interviews. Participant observation methods were also conducted for the case studies of three ABOs. In the second stage, a quantitative approach was adopted to collect data from a total of 186 knowledge workers in two international companies based in Sweden. The mixed methods approach was used to triangulate the data from the two stages. The two sets of data were merged by combining the different findings in the section on practical relevance and suggestions for improving environmental designers’ and facility managers’ understanding to manipulate ABO spaces to promote creativity in the workplace. The results showed that privacy, noise levels, and distraction-free environments were the most important factors in fostering individual employee creativity, as were open spaces with zones for different noise levels and private enclosed spaces. For group creativity, the importance of providing appropriate equipment and furniture in ABOs was observed - collaborative and disengaged spaces were found to be the most recurring spaces for group creativity. In addition, employee preferences were found to be an important component to consider when looking at environmental features, space types, and types of creative activities in creativity-enhancing ABOs. Using regression with bootstrapping for quantitative data, it is found that job autonomy and organizational commitment serially mediate this relationship. Study results suggest that organizations with ABOs exert on employees a sense of control over their work, leading them to feel more committed to their organization and consequently improving creativity in the group.Item Open Access The Influence of DINESCAPE on emotions and behavioral intentions of customers(Bilkent University, 2015-07) Yekanialibeiglou, SepidehThis study explores the impacts of physical environmental items (DINESCAPE) on emotions and behavioral intentions of customers at an upscale restaurant. The theoretical framework is grounded on the Mehrabian- Russell model which suggests that any environment will evoke one of the three emotional states: pleasure, arousal, and dominance. A field study approach is used in this study and conducted with 152 participants who were dining at a restaurant. Among upscale restaurants in Ankara, two branches of Midpoint chain restaurants were selected as the case study to evaluate the influence of the DINESCAPE items in evoking emotional states that have an impact on behavioral intentions of customers. Using the multiple regression analysis, the findings indicated that the facility aesthetic has a positive effect on arousal dimension; layout on arousal and dominance dimensions; table set up on pleasure dimension; and ambience on pleasure and dominance dimensions. Furthermore, the results indicated that table set up and ambience dimensions of DINESCAPE have a direct influence on behavioral intentions. Among customer emotions, pleasure and dominance dimensions were the significant determinants of behavioral intentions.Item Open Access An international survey on residential lighting: Analysis of winter-term results(Elsevier BV, 2021-12) Aslanoğlu, R.; Kazak, J. K.; Yekanialibeiglou, Sepideh; Pracki, P.; Ulusoy, BegümBy conducting an international survey on residential lighting, a great variety of data showing the differences and similarities in lighting conditions among Poland, Turkey, Sweden and the U.K. were collected which provided an overall perspective for raising the standards of luminous environments. A total of 500 participants (125 respondents from each country- 47.6% females, 51.2% males, and 1.2% who did not wish to specify gender) provided detailed self-assessments of the lighting conditions in their living areas. The study identified interrelated factors associated with residential lighting using descriptive statistics, correlation coefficient functions and thematic analysis. As the survey results showed, the satisfaction with daylighting quality depends on daylighting sufficiency, daylighting uniformity, and number of sunlight hours (i.e., sunlight exposure), view-out and ratio of windows in the living area. Moreover satisfaction with artificial lighting quality depends on artificial lighting sufficiency, artificial lighting uniformity, artificial lighting brightness, and artificial lighting color rendering index. Overall, the findings of the study showed the potential factors that can be used to effectively change the day- and artificial lighting in residential areas, leading to a sustainable and better lighting environment.Item 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, SepidehLighting 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.