objective(s): a novel iq-specttm method has become widely used in clinical studies. the present study compares the quality of myocardial perfusion images (mpi) acquired using the iq-specttm (iq-mode),conventional (180° apart: c-mode) and l-mode (90° apart: l-mode) systems. we assessed spatial resolution, image reproducibility and quantifiability using various physical phantoms. materials and me...

Merkez-çevre dikotomisi Osmanlı-Türk toplumunda yöneten-yönetilen ilişkisinin kuramsal açıklanmasında kullanılan en önemli paradigmadır. Bürokratik mekanizmalar tarafından kutsal kabul edilen ve mutlak, değişmez nitelikteki merkezin değerleri ile bunların dışında kalan çevrenin ayrımına dayanan bu paradigma, çok uzun yıllar Türkiye siyasetinin hakim paradigma olarak edilmiştir. Türkiye’de merke...

Wind affects adversely the cooling tower thermal performance. A field investigation was carried out to study the thermal performance of Heller cooling towers under wind conditions, involving measurement of wind velocity and its direction around the cooling tower, and obtaining water flow rates and temperatures at the cooling tower inlet and outlet. Results show that air suction at the tower top...

In this work, using the Rayleigh-Sommerfeld integral and Berry formula, topological charge (TC) of a Gaussian optical vortex with an initial fractional TC is calculated. It shown that for different parts TС, beam contains number screw dislocations, which determine TС entire beam. With small part consists main centered on axis equal to nearest integer (let be n), two edge dislocations located ve...

Mutation/selection algorithms were applied to increase the efficiency and the robustness of sparse random networks. Selection for better efficiency leads to the well-known star topology, while selection for robustness only results in a relatively dense core and a small periphery. Concomitant selection for both efficiency and robustness leads to networks with intermittent center/periphery values...

PURPOSE To determine the topographic effects of zonular tension on the anterior surface of the human crystalline lens. METHODS Real-time topography of the anterior surface of seven fully relaxed, freshly extracted intact, clear, human crystalline lenses aged 3, 17, 45, 54, 54, 56, and 56 years was qualitatively obtained before, during, and after the application of zonular traction. Zonular tr...