Transformations of the Tunisian Society Marine Environment

analysis of power in the network society

اندیشمندان و صاحب نظران علوم اجتماعی بر این باورند که مرحله تازه ای در تاریخ جوامع بشری اغاز شده است. ویژگیهای این جامعه نو را می توان پدیده هایی از جمله اقتصاد اطلاعاتی جهانی ، هندسه متغیر شبکه ای، فرهنگ مجاز واقعی ، توسعه حیرت انگیز فناوری های دیجیتال، خدمات پیوسته و نیز فشردگی زمان و مکان برشمرد. از سوی دیگر قدرت به عنوان موضوع اصلی علم سیاست جایگاه مهمی در روابط انسانی دارد، قدرت و بازتولید...

Transformations of Information Society

The Marine Technology Society

Acoustic imagery generated by the Naval Research Laboratory's ASCS (Acoustic Sediment Classification System) is analyzed using tunefrequency methods. The ASCS imagery is generated using normal-incidence acoustic data, Nonlinearities in the propagating medium produce multiple harmonics in the return. Different components of the bottom and sub-bottom produce different spectral signatures, based o...

The Marine Technology Society

The advent of multibeam bathymetry systems, which are capable of total seafloor ensonification, have made fundamental changes in hydrography. The new IHO S-44 standards challenge hydrographers to achieve even greater depth and position accuracy with multibeam systems. ORCA has made incremental improvements in each of these areas as demonstrated in a series of at sea survey tests. Improvements h...

Deterioration of Concrete in Ambient Marine Environment (RESEARCH NOTE)

Structural concrete exposed to marine environment deserves special attention as the diffused sea salts chemically react with harden cement matrix and forms various expansive/leachable compounds leading to loss of material, strength, cracking, spalling etc. This study cover the effect of sea water on the specimens cast from two grades of concrete exposed to simulated marine environment over a ye...