Physics, 26470, Eskişehir, Turkey. (phone: +90-222-335-0580; fax: +90-222-320-4910) 2 Anadolu University, Applied Research Centre for Environmental Problems, 26555 Eskişehir, Turkey. (phone: +90-222-321-2528; fax: +90-222-321-2528) Abstract. The aim of this study is to produce a digital contamination map which is interactively rectified with a database, projected and scaled. For this reason, a detailed investigation was conducted for an understanding of contamination dispersal characteristics in terms of the contribution of heavy metal concentrations, such as mg/kg of Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn in a city center. CIAPRG Methodology (Contribution Independent of Amount through Positional Recoding and Grading) has been developed and used for the first time in this study by the authors in order to constitute a map of total heavy metal contamination distribution characteristics. Heavy metals from fifteen soil sample points, which were situated at different locations in the study area, were collected for chemical analysis. Data obtained by the chemical analysis was inserted into CIAPRG methodology. The majority of total heavy metal contribution is shown to be based on Cu, Mn and Ni. The effects of the contribution to pollution values which were recoded and graded, can be shown in relation to buildings, independent of the quantity of pollutant within the context of CIAPRG methodology. The resulting map designated that the mid and south-western parts of the study area were more intensive than the other parts in terms of heavy metal contamination. The graded contaminator values for soil and roadside dust were together compared with graded values for soil graded contaminator values, and roadside dust graded contaminator values, separately, using independent sample t tests with the results being interpreted.
In parallel with the rapid growth in Turkish air transportation, air traffic density and congestion of Turkish airspace have been increasing in recent years. The aim of this study is to examine the structural features and the capacity of Turkish airspace. In this context, the map of Turkish airspace containing sector boundaries, routes and waypoints is digitized and transferred to the GIS environment. The real traffic data of Turkish airspace for a period of two peak hours in heavy traffic during August 2007 was provided by the General Directorate of Turkish Airports. Analysis results indicate that the traffic density of Turkish airspace is accumulative especially in certain sectors. The results obtained from the analyses were compared with the existing sector structure of Turkish airspace and some suggestions related to capacity problems are provided. These suggestions can also be used for the strategic planning of airspace.
The cataclysmic variable SDSS J214354.59+124457.8 (hereafter SDSS J214354) was observed photometrically on sixty one nights between 2012 July 28 and 2019 May 26. The long term variation of this object shows changes between two phases; a dwarf nova type and a novalike. This implies that the object belongs to the group of Z Cam type stars. The timing analysis of the light curve reveals a periodic signal at 0.13902(5) d, which we identify as the superhump period. However, the fractional superhump excess of 10 per cent longer than the orbital period is exceptionally large. We obtained a mass ratio of ∼0.4, which is above the accepted upper limit of q = 0.33 for the formation of superhumps. We suggest that the object contains a secondary with an evolved core. With an orbital period of 0.126 d, SDSS J214354 is situated at the upper border of the period gap. The long term light curve of SDSS J214354 is similar to those of Z Cam type stars which are characterized by recurring standstills, followed by short intervals with DN type outbursts. Therefore, we conclude that SDSS J214354 is a new member of the Z Cam type stars.
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