Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/11147/7148
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Article Citation - WoS: 49Citation - Scopus: 52Evaluation of a Conceptual Model for Gas-Particle Partitioning of Polycyclic Aromatic Hydrocarbons Using Polyparameter Linear Free Energy Relationships(American Chemical Society, 2016) Shahpoury, Pourya; Lammel, Gerhard; Albinet, Alexandre; Sofuoglu, Aysun; Dumanoğlu, Yetkin; Sofuoğlu, Sait Cemil; Wagner, Zdenek; Zdimal, VladimírA model for gas-particle partitioning of polycyclic aromatic hydrocarbons (PAHs) was evaluated using polyparameter linear free energy relationships (ppLFERs) following a multiphase aerosol scenario. The model differentiates between various organic (i.e., liquid water-soluble (WS)/organic soluble (OS) organic matter (OM), and solid/semisolid organic polymers) and inorganic phases of the particulate matter (PM). Dimethyl sulfoxide and polyurethane were assigned as surrogates to simulate absorption into the above-mentioned organic phases, respectively, whereas soot, ammonium sulfate, and ammonium chloride simulated adsorption processes onto PM. The model was tested for gas and PM samples collected from urban and nonurban sites in Europe and the Mediterranean, and the output was compared with those calculated using single-parameter linear free energy relationship (spLFER) models, namely Junge-Pankow, Finizio, and Dachs-Eisenreich. The ppLFER model on average predicted 96 ± 3% of the observed partitioning constants for semivolatile PAHs, fluoranthene, and pyrene, within 1 order of magnitude accuracy with root-mean-square errors (RMSE) of 0.35-0.59 across the sites. This was a substantial improvement compared to Finizio and Dachs-Eisenreich models (37 ± 17 and 46 ± 18% and RMSE of 1.03-1.40 and 0.94-1.36, respectively). The Junge-Pankow model performed better among spLFERs but at the same time showed an overall tendency for overestimating the partitioning constants. The ppLFER model demonstrated the best overall performance without indicating a substantial intersite variability. The ppLFER analysis with the parametrization applied in this study suggests that the absorption into WSOSOM could dominate the overall partitioning process, while adsorption onto salts could be neglected. (Figure Presented).Conference Object Citation - Scopus: 10The Rationale Behind Growth Patterns: Socio-Spatial Configuration of Izmir, Turkey 1700s - 2010(Space Syntax Laboratory,The Bartlett School of Architecture, 2015) Can, Işın; İnce, İrem; Yamu, ClaudiaIzmir, which the recent excavations have shown to be an 8000-year-old city, has gone through various stages in its development process. It was an important harbour city located on Turkey's west coast, triggering commerce between east and west. When the inner harbour was revitalized in the 17th century, trade activities increased and the city became an even more popular destination for Levantines1. By the 19th century, therefore, ̄zmir s morphology was defined by its cosmopolitan structure, especially where the historical centre emerged. The urban pattern changed drastically during the period between the end of the 19th century and the beginning of the 20 century. In each period, intrinsic and extrinsic socio-spatial dynamics including natural and man-made disasters, planning decisions, and the exchange of Greek and Turkish immigrants determined the growth processes of the city. This study investigates the generative rules of Izmir's urban structure by looking at nine different periods based on intrinsic and extrinsic dynamics. These periods were chosen according to the availability of historical maps and data. We observed morphological changes throughout the 1700s and the years 1836, 1856, 1876, 1885, 1905, 1922, 1941, and 2010. In order to analyse urban transformation and growth processes coupled with underlying indicators, this study uses segment angular analysis. Socio-spatial dynamics are discussed for each period. This paper aims to reveal how intrinsic and extrinsic phenomena shape urban form in cities. By looking at a hybrid city like Izmir incorporating radial, orthogonal and organic patterns, this study tries to understand urban transformation over time using space syntax analysis.