The old intuitive question ”what does the machine think” at different stages of its computation is examined. Our paper is based on the formal definitions and results which are collected in the branching program theory around the intuitive question ”what does the program know about the contents of the input bits” [1],[2],[3],[4],[5]. We further develop these results above and we present a formal...

If you expect a nobel prize winner being a crank who can think of nothing but his subject, then read Roald Hoffmann's The Same and Not the Same and test your hypothesis. This book is about chemistry, to be sure – but in the broadest scope including sociology, psychology , ethics and philosophy of chemistry. 51 nice little chapters grouped in ten parts reflect on chemistry from different aspects...

abstract statement of problem: the viscosity of orthodontics adhesive primers is crucial for stability and correct brackets ‘position during bond up. an excessive adhesive flow during brackets seating could change the brackets’ position. objectives: the main purpose of this study was to investigate the viscosity of four orthodontic adhesive primers in two different temperatures. materials and m...

mold powders used in the continuous casting of steel contain the harmful caf2 as a main substance developing toxic gases such as sif4 and hf at elevated temperatures. in this study, three samples of i1, i2 and i3, which contained gypsum free portland cement clinker with different percentages of fe2o3 (5.68, 6.83, 8.02 ) and f- (2.09, 1.06, 0), were prepared and their main characteristics were c...

in this work, artificial neural network (ann) was utilized to develop a new model for the predictionof the kinematic viscosity of petroleum fractions. this model was generated as a function oftemperature (t), normal boiling point temperature (tb), and specific gravity (s). in order to developthe new model, different architectures of feed-forward type were examined. finally, the optimumstructure...