Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7755

Browse

Filters

2008 - 200922010 - 20193

Settings

Author: search.filters.author.Kazanasmaz, Zehra Tuğçe

Search Results

Now showing 1 - 5 of 5
  • Article
    Citation - WoS: 10
    Citation - Scopus: 11
    Analysis of the Relationship Between Daylight Illuminance and Cognitive, Affective and Physiological Changes in Visual Display Terminal Workers
    (SAGE Publications Inc., 2019) Öner, Merve; Kazanasmaz, Zehra Tuğçe; Leccese, F.; Salvadori, G.
    This study explored the impact of daylight illuminance on cognitive load during visual display terminal use by means of various physiological, performance and subjective measures. Repeated-measures design was adopted to identify the impact of variations in daylight levels that were manipulated through the shading system configurations (shading-on; shading-off). A total of 30 subjects performed visual and cognitive demanding tests. Performance measures were supported by subjective data and eye-related measures during the experimental analysis. Results revealed that the use of a shading system had positive impact on sustained attention. Concerning ocular measures, percentage of eye closure values showed opposite tendencies among vigilance and sustained attention demanding tests. Eye aspect ratio-max and blink duration were significantly correlated with reported glare sensation. In all tests, eye aspect ratio-max was found significantly higher in lower illuminances. Search velocity was significantly correlated with ocular variables in higher illuminances whereas sustained attention showed an opposite trend. This, initially, explains that even slight differences in daylight illuminance might have distinctive effects on the relationship between different groups of assessment variables while measuring cognitive load. Secondly, it proves the significance of carrying out sensitive experiments in terms of both light levels and test characteristics.
  • Article
    Citation - WoS: 21
    Citation - Scopus: 27
    Exploring the Impact of External Shading System on Cognitive Task Performance, Alertness and Visual Comfort in a Daylit Workplace Environment
    (SAGE Publications Inc., 2019) Leccese, F.; Salvodori, G.; Öner, Merve; Kazanasmaz, Zehra Tuğçe
    The authors examined the effect of external shading system on cognitive performance, alertness and visual comfort of visual display terminal (VDT) users under two realistic office lighting settings in this study. Daylight was the source of illumination being considered as the most significant and preferred one. A total of 26 participants performed visual and cognitive demanding tasks as well as providing subjective alertness, performance and visual evaluations in a full-scale mock-up VDT workstation. Two trials (with and without shading system) were executed during one experimental session. Results revealed that the use of a shading system improves the performance of a user on colour-naming task requiring sustained attention, while no differential effects were observed on tasks involving other cognitive skills such as search velocity and vigilance. Within-subject performance differences were more pronounced during morning hours. Higher performance was reported in some cognitive tests when the subjective sensation of visual discomfort was lower.
  • Master Thesis
    Simultaneous Improvement in Visual and Acoustic Performance by Modifying Common Design Components in Lecture Halls
    (Izmir Institute of Technology, 2017) Öztürk, Yasemin; Kazanasmaz, Zehra Tuğçe
    Providing indoor comfort conditions at optimum level in educational buildings increases the concentration, the desire for learning and occupants’ performance. The learning environment’s appeal for students and teachers are mostly derived from their visual and aural sensations. So, properly-designed lighting and acoustic conditions have become an important concern. Daylighting is a component of energy saving strategy. It provides visual performance and comfort to support executing tasks, additionally to achieve aesthetic and occupants’ appraisal of the physical environment. However, too high background noise and low intelligibility lead to disturbance in hearing and understanding. Such problems mainly cause the lack of concentration, which disturb occupants’ satisfaction with the indoor acoustic environment. Both students and lecturers raise their voices to communicate better when there is poor reverberation and clarity. Yet, measures and precautions to improve one aspect are not enough. Designers/researchers can establish an integrated approach to deal with the aspects of daylighting and acoustics under common design criteria; since, one design alternative developed to improve sound distribution modifies the visual performance either in an effective way or in an unfavorable way. It is necessary to propose common design alternatives, such as ceiling geometry, seating layout and material combination to conclude simultaneous enhancement in visual and acoustic performance. To achieve that, this thesis presents analyses of DIALux and ODEON models of a lecture hall proposing design component choices for ceiling geometry, seating layout, and material combinations. Simulation findings direct out attention to how to design a lecture hall in an integrated approach.
  • Master Thesis
    A Prediction Model for Daylighting Illuminance for Office Buildings
    (Izmir Institute of Technology, 2008) Binol, Selcen; Kazanasmaz, Zehra Tuğçe
    Daylight is a primary light source for the office buildings where a comfortable and an efficient working environment should be provided mostly during day time. Evidence that daylight is desirable can be found in research as well as in observations of human behavior and the arrangement of office space. A prediction model was then developed to determine daylight illuminance for the office buildings by using Artificial Neural Networks (ANNs). A field study was performed to collect illuminance data for four months in the subject building of the Faculty of Architecture in .zmir Institute of technology. The study then involved the weather data obtained from the local Weather Station and building parameters from the architectural drawings. A three-layer ANNs model of feed-forward type was constructed by utilizing these parameters. Input variables were date, hour, outdoor temperature, solar radiation, humidity, UV Index, UV dose, distance to windows, number of windows, orientation of rooms, floor identification, room dimensions and point identification. Illuminance was used as the output variable. The first 80 of the data sets were used for training and the remaining 20 for testing the model. Microsoft Excel Solver used simplex optimization method for the optimal weights. Results showed that the prediction power of the model was almost 97.8%. Thus the model was successful within the sample measurements. NeuroSolutions Software performed the sensitivity analysis of the model. On the top of daylight consideration, this model can supply beneficial inputs in designing stage and in daylighting performance assessment of buildings by making predictions and comparisons. Investigation about this subject can be able to support the office buildings. having intended daylighting comfort conditions.
  • Master Thesis
    Thermal comfort evaluation in intelligent buildings; case study in Darüşşafaka Residence
    (Izmir Institute of Technology, 2009) Soykan, Esra; Kazanasmaz, Zehra Tuğçe; Kazanasmaz, Zehra Tuğçe
    Building performance evaluation studies has been an important research area in recent years. Technologic developments, increasing demands of users, complexity of buildings, increasing energy consumption in complex buildings and economic factors force designers to find new solutions. There are several studies in literature using building evaluation techniques to suggest standard values for comfort conditions. Intelligent buildings, that have purpose to fulfill comfort conditions effectively while minimizing energy consumption, take an important part in performance evaluation studies.The main objective of this study is evaluating the indoor thermal comfort conditions in a selected building, in terms of thermal comfort requirements. An Intelligent building; Darüşşafaka Residence selected as a case building. The research aims to reach the refined and precise knowledge about thermal comfort requirements. Complex structures and intelligent buildings are often preferred in building evaluation studies. In this study the research field is a residential building, a kind of dormitory for old people over the age of 65. Thermal comfort evaluation of the building has been conducted in two ways namely objective analysis and subjective analysis. Objective analysis includes field measurements of variables that affect thermal comfort.Measurements done by specific equipment called data logger. Subjective data analysis acquired by occupant.s ideas with interviews. Quantitative data obtained from the objective analysis supported by the qualitative data acquired from individuals. Thus, the results of thermal comfort conditions are interpreted with respect to various thermal sensations of old people. Using both objective and subjective results permitted to evaluate the thermal perception of users.