Sinop Müzesi nde Bulunan Üç Plastik Kandil

Guruswami-Sinop Rounding without Higher Level Lasserre

Guruswami and Sinop [11] give a O(1/δ) approximation guarantee for the non-uniform Sparsest Cut problem by solving O(r)-level Lasserre semidefinite constraints, provided that the generalized eigenvalues of the Laplacians of the cost and demand graphs satisfy a certain spectral condition, namely, λr+1 ≥ Φ∗/(1 − δ). Their key idea is a rounding technique that first maps a vector-valued solution t...

NDE of Aerospace Components

Investment cast aerospace components are prone to defects related to solidification process. The hollow columnar-grained aero engine Vane casting, being discussed in this paper, suffers further from extraneous defects such as inclusions, core shift and resultant dimensional deviations. Due to its design complexity and stringent specifications, non-destructive evaluation (NDE) of this component ...

Overview of Quantitative NDE

Microwave NDE of Ceramics

The objective of this work is to evaluate the potential of microwave techniques for detecting, classifying, and determining the dimensions of inclusions and surface cracks in structural ceramics such as Si3N4. Experimental results that show the feasibility of detecting various types of inclusions and voids in Si3N4 have been obtained, and these results are reviewed. In addition, the question of...

Development of Transducers for NDE

Several new types of transducers are described. These include 50 500 MHz transducers using thin film technology and indium techniques, transducer arrays for imaging, edge-bonded transducers, and unipolar transducers.