In this paper the coupling between the sea, the ship and humans is studied. In previous researches mathematical models of fast ship’s motions have been determined. In the literature there are models of human sickness and models of the sea. This knowledge about seasickness, waves and ship motion has been gathered. Using this information it is possible to extract some criteria for the captain (ma...

In this paper the coupling between the sea, the ship and humans is studied. In previous researches mathematical models of fast ship’s motions have been determined. In the literature there are models of human sickness and models of the sea. This knowledge about seasickness, waves and ship motion has been gathered. Using this information it is possible to extract some criteria for the captain, ma...

An air-sea battle. During the month of June in the year 1943, an Italian supply ship had the misfortune to encounter a British submarine, the United. The United, barely visible at point A in the photograph shown in Figure 1, fired its torpedoes at the Italian ship; some of these torpedoes missed, passing beyond the frame of the photograph (D), but some struck the ship, near the center of the ph...

This study presents an application of digital video camera for object tracking and positioning. The main purpose of the study is to automatically trace and position a motionless object on the video images that are recorded on a moving vehicle. Because of the change of the focal length of camera and the movement of the vehicle, the appearance of a motionless object on the video images firstly wi...

In this paper we establish some subnormal embeddings of groups into groups with additional properties; in particular embeddings of countable groups into 2-generated groups with some extra properties. The results obtained are generalizations of theorems of P. Hall, R. Dark, B. Neumann, Hanna Neumann, G. Higman on embeddings of that type. Considering subnormal embeddings of finite groups into fin...

An intrusion detection system (IDS) is used to manage network traffic and monitors for suspicious activity and alerts the system or network administrator. One of the major properties of IDS is to respond for anomalous or malicious traffic by taking action such as blocking the user or source IP address from accessing the network. IDS can identify threats in various ways: 1) it detects specific s...

This study examines large oceangoing ships as a source of giant cloud condensation nuclei (Dp> 2μm) due to wake and stack emissions off the California coast. Observed particle number concentrations behind 10 ships exceeded those in “control” areas, exhibiting number concentration enhancement ratios (ERs) for minimum threshold diameters of ~2, ~10, and ~20μm as high as 2.7, 5.5, and 7.5, respect...