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Number of results: 4
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Abstract

The purpose of this analysis is to deal with the first of the conditions for commencement of laytime, i.e. obligation of the vessel to arrive at the agreed destination. The position, prima facie, with regard to berth, dock or port is relatively straightforward, it having been established that the vessel only becomes an arrived ship when it enters the specified berth, dock or port, respectively. In all three cases, in principle, the risk of delay in reaching the specified berth, dock or port is borne by the shipowner. In many cases, the shipowners, for obvious reasons are not prepared to bear such a risk for loss and take appropriate action. In particular, they demand the inclusion, in the charterparty, of a specific clause shifting the risk of such loss. We will deal therein below with one of the most commonly used forms of such a clause namely – “Time lost waiting for a berth clause” against broader picture of current English jurisdiction.

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Authors and Affiliations

Marek Czernis
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Abstract

Distracted driving is a significant factor affecting road safety and it can occur as a result of using mobile phones while driving. The aim of the current research is to present the prevalence of mobile phone use by Polish car drivers, based on the roadside and online survey. The field study showed that 11.6% of 1867 drivers were using mobile phones while being in motion and 26.1% of 203 drivers when stopped in front of traffic lights. While moving, 8.9% were manipulating the device by hand and 2.6% – holding it to ear. During the stop, 14.2% of the observed motorists were manipulating it, 3.0% – holding it to the ear, and 8.9% – talking through a hands-free or headset. To determine how many people generally use mobile phones while driving (not only during momentary observation), a questionnaire was also carried out. The vast majority of 252 surveyed drivers (82.9%) admitted to using mobile phones while driving, and an equally large proportion considered this behavior as dangerous for transport safety (81.3%). Most of the motorists reported using cell phones: rarely (44.4%), both when stopped and being in motion (58.9%), in a built-up area (63.6%), holding it in hand (43.5%) and in order to chat or write messages (81.8%). The majority of drivers using cell phones while driving were male and in the 25–44 or 18–24 age group. None of the respondents caused an accident due to the use of these devices, but 1.6% were guilty of a collision caused by this reason.
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Authors and Affiliations

Paulina Szrywer
1
ORCID: ORCID
Joanna Wachnicka
1
ORCID: ORCID
Wojciech Kustra
1
ORCID: ORCID
Orazio Pellegrino
2
ORCID: ORCID

  1. University of Technology, Department of Highway and Transportation Engineering, ul. Gabriela Narutowicza 11/12, 80-233 Gdańsk
  2. University of Messina, Department of Engineering, Contrada di Dio – Villaggio Sant’Agata, Messina, Italy
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Abstract

The main goal of robot path planning is to design an optimal path for a robot to navigate from its starting point to its goal while avoiding obstacles and optimizing certain criteria. A novel method using marine predator algorithm which is used in the field of robot path planning is presented. The proposed method has two steps. First step is to build a mathematical model of path planning while second step is optimization process using marine predator algorithm. Simulation results show that the proposed method works well and has good performance in different situations. Therefore, this method is an effective method for robot path planning and related applications.
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Authors and Affiliations

Qiang Wang
1
Yinghui Huang
2

  1. College of Electronic and ElectricalEngineering, Bengbu University, Bengbu 233030, China
  2. College of Computer and Information Engineering, Bengbu University, Bengbu233030, China
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Abstract

The eurybathic isopod species Chelator insignis shows a wide distribution south of Iceland. We analysed 51 specimens from shelf (213–305 m depth), slope (885–891 m and 1380–1390 m depth) and deep−sea habitats (2750 m) south of Iceland with different DNA markers. A fragment of the mitochondrial cytochrome c oxidase subunit I gene (COI) was studied for 47 specimens, 16S was studied for 36 specimens, and a fragment for the 18S rRNA gene could be amplified for 11 specimens. For the COI data, specimens clustered into five distinct lineages each separated by ³ 20% uncorrected pairwise distances. Both the mitochondrial 16S and the nuclear 18S sequence data further support this deep divergence, suggesting the presence of overlooked species inside the nominal C. insignis . Populations on the shelf occurring east and west of the Reykjanes Ridge were genetically identical suggesting that this ridge is not a barrier to gene flow. However, populations from different depth ranges differed substantially. Our multi−gene analysis suggests that the newly found species likely have more narrow vertical distribution ranges and highlights a possible role of bathymetry in speciation processes.
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Authors and Affiliations

Saskia Brix
Jörundur Svavarsson
Florian Leese

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