Reza Yousefnezhad

Reduction of distance between the ship fl oor and the seabed when a ship is moving forward is called squat. Squat causes grounding of the ship that may result in severe damage to the ship and in extreme cases may lead to complete loss of port or channel capabilities. If a ship moves in the shallow waters then the velocity of the fl uid fl ow at the bottom of the ship increases and the pressure decreases which in turn leads to the decrease of buoyancy force and the increase of the ship draught. The purpose of the presented research was to determine the squat for vessels with the Series-60 hull forms in various depths by experimental methods. For this reason, a set of facilities for testing the ship movement in shallow waters were prepared and then the measurement tools were calibrated. A series of models of the vessel were manufactured and many tests were carried out. Disregarding the non-acceptable data, the test results were analyzed in various depths and draughts. To generalize th...

From the dawn of civilization, people have used folktales and stories to share information and knowledge. After the invention of printing in the 15th century, technology provided helpful yet complicated utilities to exchange ideas. In the present computerized world, the art of storytelling is becoming more influential through the unprecedented multimedia capabilities of computers. In this article, we introduce a state-of-the-art presentation software by which academicians can present nonlinear topics efficiently and sharpen their storytelling skills. We show how the proposed software can improve the scientific presentation style. We conducted a survey to measure the attractiveness of proposed utility among other alternatives. Results show that academicians prefer the proposed platform to others.