A New Definition of a Collision Zone For a Geometrical Model For Ship-Ship Collision Probability Estimation

2011 ◽  
pp. 93-100
Author(s):  
J Montewka ◽  
F Goerlandt ◽  
P Kujala
Keyword(s):  
Geometrical Model ◽  
Collision Probability ◽  
Probability Estimation ◽  
Collision Zone ◽  
Ship Collision ◽  
Definition Of

scholarly journals An Improved Ship Collision Risk Evaluation Method for Korea Maritime Safety Audit Considering Traffic Flow Characteristics

2019 ◽  
Vol 7 (12) ◽  
pp. 448 ◽  
Author(s):  
Yunja Yoo ◽  
Tae-Goun Kim
Keyword(s):  
Distribution Function ◽  
Normal Distribution ◽  
Traffic Flow ◽  
Evaluation Method ◽  
Collision Probability ◽  
Normal Distribution Function ◽  
Collision Risk ◽  
Ship Traffic ◽  
Ship Collision ◽  
Best Fit

Ship collision accidents account for the majority of marine accidents. The collision risk can be even greater in ports where the traffic density is high and terrain conditions are difficult. The proximity assessment model of the Korea Maritime Safety Audit (KMSA), which is a tool for improving maritime traffic safety, employs a normal distribution of ship traffic to calculate the ship collision risk. However, ship traffic characteristics can differ according to the characteristics of the sea area and shipping route. Therefore, this study simulates collision probabilities by estimating the best-fit distribution function of ship traffic flow in Ulsan Port, which is the largest hazardous cargo vessel handling port in Korea. A comparison of collision probability simulation results using the best-fit function and the normal distribution function reveals a difference of approximately 1.5–2.4 times for each route. Moreover, the collision probability estimates are not accurate when the normal distribution function is uniformly applied without considering the characteristics of each route. These findings can be used to improve the KMSA evaluation method for ship collision risks, particularly in hazardous port areas.

Modelling and testing of a granular insulating material

2017 ◽  
Vol 42 (1) ◽  
pp. 6-15 ◽  
Author(s):  
Bożena Orlik-Kożdoń ◽  
Artur Nowoświat
Keyword(s):  
Thermal Conductivity ◽  
Granular Medium ◽  
Geometrical Model ◽  
Calculation Model ◽  
Elastic Plates ◽  
University Of Technology ◽  
Building Component ◽  
Definition Of ◽  
Insulation Plate

In the following article, the Authors present the results of initial researches into a building component needed for thermal insulation. The building component is a elastic insulation plate made from recycling materials. The solution is protected by industry patter Elastyczna pyta izolacyjna No 23 621 for Silesian University of Technology Gliwice. The paper presents the determination method of effective thermal conductivity for granular materials. It is based on the geometrical model for the determination of granular medium structure, which is based on the theory of the highest-density arrangement of equal-sized spheres. The elaborated by the Authors modeling results, obtained on the basis of an innovative description (definition) of granular medium, were addressed to the commonly applied two-component medium. To verify the correctness of the calculation model proposed by the Authors, the results were subjected to validation, basing on the thermal conductivity of elastic plates in a hot plate apparatus.

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