Extracting the Maritime Traffic Route in Korea Based on Probabilistic Approach Using Automatic Identification System Big Data

To protect the environment around the world, we are actively developing ecofriendly energy. Offshore wind farm generation installed in the sea is extremely large among various energies, and friction with ships occurs regularly. Other than the traffic designated area and the traffic separate scheme, traffic routes in other sea areas are not protected in Korea. Furthermore, due to increased cargo volume and ship size, there is a risk of collisions with marine facilities and marine pollution. In this study, maritime safety traffic routes that must be preserved are created to ensure the safety of maritime traffic and to prevent accidents with ecofriendly energy projects. To construct maritime traffic routes, the analysis area is divided, and ships are classified using big data. These data are used to estimate density, and 50% maritime traffic is chosen. This result is obtained by categorizing the main route, inner branch route, and outer branch route. The Korean maritime traffic route is constructed, and the width of the route is indicated. Furthermore, this route can be applied as a navigation route for maritime autonomous surface ships.

Customizing Stata Graphs made Easy (Part 1)

The overall look of Stata's graphs is determined by so-called scheme files. Scheme files are system components; that is, they are part of the local Stata installation. In this article, I argue that style settings deviating from default schemes should be part of the script producing the graphs, rather than being kept in separate scheme files, and I present a simple tool called grstyle that supports such practice.

Avoidance of Unregistered Company Charges (Companies Act 2006, Section 859H)

The presence of a charge over a company’s property will reduce the likelihood of an unsecured creditor obtaining payment, or at least a substantial dividend, in the insolvency of the company. The prudent unsecured creditor will bear this in mind in assessing whether to advance credit to a company, and at what level. For this reason a system of charges registration has long been employed, initially with a separate scheme for England and Wales and another for Scotland, in order that unsecured creditors can be aware of the presence of charges. This system has recently been revised and simplified and a single scheme now applies in the UK with effect from 6 April 2016. Charges created by UK companies prior to that date remain subject to the previous regime.

CRITICAL ANALYSIS OF A COMBINED HUFFMAN AND CONVOLUTIONAL CODING SCHEME

In this paper, a critical analysis of the joint source channel coding scheme proposed by Honary et al.1 is given. We show mathematically that although the algorithm leads to a reduction in the overall number of decoding states it increases both the time and space complexity of the decoding process. Moreover, the hardware complexity of the proposed scheme is also analyzed and it is observed that the joint decoding algorithm is in the first place extremely complex to implement and secondly, it significantly increases the number of components required, thereby increasing the power consumption. A mathematical proof that the joint decoding scheme has the same error performance as a separate scheme is also given. Finally, the simulation results show that the joint decoding scheme takes a significantly greater time to decode than a separate scheme, for the same error performance.

Memory for Routes

Two experiments examined the acquisition of cognitive maps of two intersecting routes through an urban area. In the presentation stage of the experiments, slides of the two routes were shown in order to simulate travel along the routes. The number of presentations of the slides was varied. In the test stage, subjects made directional and distance judgements from memory between places on the routes. The results suggest that from the start of acquisition of the spatial layout of the routes, subjects used network schemata in which both routes were combined, rather than a separate scheme for each route which were later combined. During initial acquisitions of the routes, a direction of travel bias was found such that spatial judgements from memory tended to be more accurate in the direction of travel along the routes than in the opposite direction. The findings imply that, at least during early acquisition, the spatial properties of the routes were encoded in terms of sequential associations.