Time series of chlorinated hydrocarbon residues in seawater and plankton.

Kıdeys, Ahmet Erkan


Time evolution of the horseshoe vortex system forming around a bridge abutment
Köken, Mete; Göğüş, Mustafa (2010-12-01)
Scour forming around an isolated bridge abutment with curved end is investigated in this study. Clear water scour experiments are conducted for an abutment in a 25 m long sediment flume at a Reynolds number of 45000. 3D scour patterns forming around the abutments are obtained using an array of acoustic transducers along a grid refined up to 1-2 cm spacing at different stages of the scour. Detached Eddy Simulation (DES) is performed at the same channel Reynolds number for flat bed case (initiation of the sco...
Time evolution of the flow characteristics around bridge abutments during scouring process
Yıldız, Burhan; Köken, Mete; Göğüş, Mustafa; Department of Civil Engineering (2014)
This study involves numerical and experimental investigation of the velocity field and the time evolution of the scour pattern forming around bridge abutments. The experimental part of the study includes velocity field recordings by using an ADV device and eroded bed bathymetry measurements by an ultrasonic ranging system. Using the ADV measurements; the velocity components, the upstream part of the primary vortex and the change of downstream recirculation region dimensions by the change in abutment length,...
Time-dependent material behaviour of aged surface support liner
Güner, Doğukan; Öztürk, Hasan (2018-07-06)
Time-wise variation of scouring at bridge abutments
Yanmaz, Ali Melih (Springer Science and Business Media LLC, 2007-06-01)
Accurate estimation of the maximum possible depth of scour at bridge C, abutments is important in decision-making for the safe depth of burial of footings. Besides, investigation of the geometric features of scour holes around abutments provides useful information for the degree of scour counter-measure to be implemented against excessive scouring. Experiments have been performed to investigate time-dependent characteristics of scour holes around vertical wall abutments under clear water conditions with uni...
Time-Varying Linkage between Equities and Oil
Ordu Akkaya, Beyza Mina; Oran, Adil; Soytaş, Uğur (World Scientific Publishing, 2020-05-01)
This study examines the correlation structures between oil futures, the S&P500 and US sectoral indices, using the Asymmetric DCC method. The results indicate that these correlations display time-varying and asymmetric characteristics. The potential effects of various factors, including copper and gold prices, dollar/euro exchange rate, T-bill rate and financial stress index on these dynamic correlations are also investigated. The dynamic links between oil and stock returns weaken in response to shocks in al...
Citation Formats
A. E. Kıdeys, “Time series of chlorinated hydrocarbon residues in seawater and plankton.,” Middle East Technical University, 1987.