WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7150

Browse

Filters

2024 - 20252

Settings

Publisher: search.filters.publisher.Gazi Univ

Search Results

Now showing 1 - 2 of 2
  • Article
    Importance of Zoning for Vertical Circulation Planning of Densely Populated Buildings: A Simulation Based Approach for Elevator Traffic Analyses
    (Gazi Univ, 2025) Deligoz, Dostcan; Harputlugil, Timucin; 01. Izmir Institute of Technology
    Elevator systems are essential in multi-story buildings, affecting circulation, travel time, and user comfort. Traditional design methods, based on mathematical calculations, provide initial estimates of elevator numbers and capacities by considering basic operational criteria. However, these methods cannot fully capture dynamic passenger flows and temporal variations in demand. Dynamic simulation-based elevator traffic analysis, on the other hand, allows for more comprehensive evaluation of elevator operations and enables testing of alternative zoning scenarios. In this study, a dynamic simulation-based analysis is applied as a case study for a hospital outpatient building. Different zoning strategies are implemented for elevator groups to evaluate their effect on system performance. Performance criteria, including Average Waiting Time (AWT), Average Time To Destination (ATTD), and Interval (INT), are assessed across different zoning scenarios and compared with values commonly reported in the literature. The results highlight the potential of zoning to improve elevator performance, including passenger handling, waiting times, and travel efficiency. Especially in buildings where physical modifications are difficult, the combination of simulation-based analysis and carefully designed zoning strategies can reveal the potential for enhancing operational performance and optimizing elevator efficiency within existing physical constraints.
  • Article
    Synthesis of Nir Responsive Ngqds-Fe3o4@ppy Nanocomposite and Investigation of Its Photothermal Performance
    (Gazi Univ, 2024) Ayman, Ceren Gokalp; Getiren, Bengu; Ciplak, Zafer; Yildiz, Nuray; 01. Izmir Institute of Technology
    In this work, magnetic nitrogen doped graphene quantum dots iron oxide-polypyrrole (NGQDs-Fe3O4@PPy) ternary nanocomposite having perfect photothermal activity was synthesized. The chemical structure and morphological of the synthesized nanocomposites were characterized by ultraviolet -visible (UV-Vis) spectroscopy, Fourier transform infrared (FTIR), X-ray diffraction spectroscopy (XRD), high -resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS). Photothermal properties of the synthesized nanocomposites were examined at different laser power densities (1.5 - 2.5 W/cm2) in the near infrared (NIR) region (808 nm) using aqueous solutions of different concentrations (0.025 - 0.1 mg / mL). The maximum temperature (Tmax) of NGQDs-Fe3O4@PPy composite reached up to 54.3 degrees C and 83.1 degrees C under irradiation of the 808 nm NIR laser at 1.5 and 2.5 W/cm2 power density for 10 min at 0.1 mg/ml concentration. The synthesized NGQDs-Fe3O4@PPy triple nanocomposite with high photothermal performance and photothermal stability is thought to have an important potential for photothermal treatment applications.