scholarly journals Ship Collision Frequency Estimation in Port Fairways: A Case Study

2015 ◽  
Vol 68 (3) ◽  
pp. 602-618 ◽  
Author(s):  
Jinxian Weng ◽  
Shan Xue
Keyword(s):  
Real Time ◽  
Collision Frequency ◽  
Frequency Estimation ◽  
The West ◽  
Movement Data ◽  
Passenger Ships ◽  
Ship Collision ◽  
Ship Movement

This study aims to evaluate ship collision frequency in port fairways. One case study is created using one month's real-time ship movement data from five major Singapore port fairways. Results show that tankers account for the biggest proportion in the Temasek fairway, whereas the percentage of Roll-on-Roll-Off (RORO) and passenger ships is quite small in the Temasek fairway, Sinki fairway, Jong fairway and Southern fairway. Tankers and container ships are the two major ship types involved in dangerous encounters. The largest number of dangerous head-on and overtaking encounters is located in the Jong fairway. The majority of dangerous crossing encounters have occurred in the West Keppel fairway and Jong fairway. Ship collision frequency at night is found to be significantly higher than during the day in these fairways.

scholarly journals Vessel Collision Frequency Estimation in the Singapore Strait

2012 ◽  
Vol 65 (2) ◽  
pp. 207-221 ◽  
Author(s):  
Jinxian Weng ◽  
Qiang Meng ◽  
Xiaobo Qu
Keyword(s):  
Real Time ◽  
Collision Frequency ◽  
Frequency Estimation ◽  
The Real ◽  
Port Authority ◽  
Movement Data ◽  
Passenger Ships ◽  
Safety Strategies ◽  
Singapore Strait

This paper aims to estimate Vessel Collision Frequency in the Singapore Strait. This frequency is obtained as the product of the number of Vessel Conflicts and the causation probability using the real-time vessel movement data from the Lloyd's Marine Intelligence Unit (Lloyd's MIU) database. The results show that the container carriers have the highest Vessel Collision Frequency while Roll-On Roll-Off (RORO) and passenger ships have the lowest frequency. Tankers cause the highest head-on collision frequency. In the Singapore Strait, the most risky overtaking area is between longitudes 103°48′E and 104°12′E. The most risky head-on area is between longitudes 103°50′E and 104°00′E while the majority of crossing collisions occur between longitudes 103°50′E and 104°12′E. The Vessel Collision Frequency is found to be 1·75 per year in the traffic lanes. Currently, westbound traffic in the Strait is more risky than eastbound traffic (the number of westbound collisions in July was 0·0991 while the number of eastbound collisions was 0·0470). Furthermore, the estimated Vessel Collision Frequency during the day is less than that at night. The results of this paper could be beneficial for the Maritime and Port Authority of Singapore to further enhance the navigational safety strategies implemented in the Singapore Strait.

scholarly journals Quantitative Ship Collision Frequency Estimation Models: A Review

2021 ◽  
Vol 9 (5) ◽  
pp. 533
Author(s):  
Mirko Čorić ◽  
Sadko Mandžuka ◽  
Anita Gudelj ◽  
Zvonimir Lušić
Keyword(s):  
Risk Assessment ◽  
Collision Frequency ◽  
Frequency Estimation ◽  
Cost Effective ◽  
Future Improvement ◽  
Ship Collision ◽  
Estimation Models

Ship collisions are one of the most common types of maritime accidents. Assessing the frequency and probability of ship collisions is of great importance as it provides a cost-effective and practical way to mitigate risk. In this paper, we present a review of quantitative ship collision frequency estimation models for waterway risk assessment, accompanied by a classification of the models and a description of their main modelling characteristics. Models addressing the macroscopic perspective in the estimation of ship collision frequency on waterways are reviewed in this paper with a total of 29 models. We extend the existing classification methodology and group the collected models accordingly. Special attention is given to the criteria used to detect potential ship collision candidates, as well as to causation probability and the correlation of models with real ship collision statistics. Limitations of the existing models and future improvement possibilities are discussed. The paper can be used as a guide to understanding current achievements in this field.

A Pleasing Odour for Yahweh

2018 ◽  
Vol 2 (1) ◽  
pp. 7-24
Author(s):  
Anne Katrine De Hemmer Gudme
Keyword(s):  
Hebrew Bible ◽  
Sacred Space ◽  
Ancient World ◽  
Hellenistic Period ◽  
The Sun ◽  
The West ◽  
Sense Of Smell ◽  
The Temple ◽  
Crucial Part

This article investigates the importance of smell in the sacrificial cults of the ancient Mediterranean, using the Yahweh temple on Mount Gerizim and the Hebrew Bible as a case-study. The material shows that smell was an important factor in delineating sacred space in the ancient world and that the sense of smell was a crucial part of the conceptualization of the meeting between the human and the divine.  In the Hebrew Bible, the temple cult is pervaded by smell. There is the sacred oil laced with spices and aromatics with which the sanctuary and the priests are anointed. There is the fragrant and luxurious incense, which is burnt every day in front of Yahweh and finally there are the sacrifices and offerings that are burnt on the altar as ‘gifts of fire’ and as ‘pleasing odors’ to Yahweh. The gifts that are given to Yahweh are explicitly described as pleasing to the deity’s sense of smell. On Mount Gerizim, which is close to present-day Nablus on the west bank, there once stood a temple dedicated to the god Yahweh, whom we also know from the Hebrew Bible. The temple was in use from the Persian to the Hellenistic period (ca. 450 – 110 BCE) and during this time thousands of animals (mostly goats, sheep, pigeons and cows) were slaughtered and burnt on the altar as gifts to Yahweh. The worshippers who came to the sanctuary – and we know some of them by name because they left inscriptions commemorating their visit to the temple – would have experienced an overwhelming combination of smells: the smell of spicy herbs baked by the sun that is carried by the wind, the smell of humans standing close together and the smell of animals, of dung and blood, and behind it all as a backdrop of scent the constant smell of the sacrificial smoke that rises to the sky.

THE VALUE OF DATA INTEGRATION IN A COMPLEX WELL SCENARIO: A CASE STUDY FROM THE WEST NETHERLANDS

2020 ◽  
Author(s):  
Abhinandan Kohli ◽  
◽  
Emile Fokkema ◽  
Oscar Kelder ◽  
Zulkifli Ahmad ◽  
...  
Keyword(s):  
Data Integration ◽  
The West ◽  
Complex Well

Islamic Law and Political Ideology

2016 ◽  
Vol 33 (1) ◽  
pp. 52-66
Author(s):  
Nesya Shemer
Keyword(s):  
Political Ideology ◽  
Islamic Law ◽  
The West ◽  
Process Of Change ◽  
Muslim Scholar ◽  
Methodological Principles

This article suggests a new way of looking at the preeminent methodological principles informing the oeuvre of Yusuf al-Qaradawi, the greatest Muslim scholar of our generation, specificallywith regard to his rulings for and about Muslims living in Europe.The case study presented here is taken from the field of Muslimprayer law, a field that has to date been subjected to very little research.By comparing the discussions of classical Muslim scholarson the topic with the new interpretations proffered by al-Qaradawi,one can notice the process of change undergone by the Shari‘ahconcerning prayer under extraordinary circumstances from Islam’searly days down to the present. We can also see how his politicaloutlooks have influenced his ruling on this issue and the discussionthereof among Muslims who do not reside in the West.

Pollution based real time control strategies for combined sewer systems

1997 ◽  
Vol 36 (8-9) ◽  
pp. 331-336 ◽  
Author(s):  
Gabriela Weinreich ◽  
Wolfgang Schilling ◽  
Ane Birkely ◽  
Tallak Moland
Keyword(s):  
Real Time ◽  
Control Strategies ◽  
Ammonia Nitrogen ◽  
Simple Extension ◽  
Real Time Control ◽  
Time Control ◽  
Sewer Systems ◽  
Receiving Waters ◽  
Tunnel System

This paper presents results from an application of a newly developed simulation tool for pollution based real time control (PBRTC) of urban drainage systems. The Oslo interceptor tunnel is used as a case study. The paper focuses on the reduction of total phosphorus Ptot and ammonia-nitrogen NH4-N overflow loads into the receiving waters by means of optimized operation of the tunnel system. With PBRTC the total reduction of the Ptot load is 48% and of the NH4-N load 51%. Compared to the volume based RTC scenario the reductions are 11% and 15%, respectively. These further reductions could be achieved with a relatively simple extension of the operation strategy.

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