Radar Training for Blind Pilotage

1968 ◽  
Vol 21 (3) ◽  
pp. 297-304
Author(s):  
A. Wepster
Keyword(s):  
Simulator Training ◽  
Training Method ◽  
The Road ◽  
Open Sea ◽  
Technical Advances ◽  
Training Courses ◽  
Institute Of Technology ◽  
Radar Simulator ◽  
Subject Material ◽  
The Right

For some years the principal maritime nations have provided sea-going and future Masters and mates with some form of radar simulator training. These training courses, although differing in duration, subject material, training method and technique, had one common aim: to familiarize responsible sea-going personnel with radar as an instrument. They taught understanding of the various instrument controls, picture or display interpretation, plotting and anti-collision tactics based on the existing international Rules of the Road and Admiralty Court jurisprudence: and all this for open-sea conditions where the Master is sole master of the situation and with no outside adviser at his disposal. Many Masters and mates have followed these very necessary and useful training courses and many more will undoubtedly follow, for nobody should today go to sea in a responsible position as Master or officer of the watch without such training. Recently, pilot authorities have started to send their pilots to the same courses and again this is a step in the right direction.A recent survey by Burger and Corbet (Welsh Institute of Technology) has furthermore shown that those trained do not seem to obtain full advantage of the acquired knowledge, once they are back in actual practice. This fact plus the fast technical advances in electronics and consequently new radar techniques should eventually lead to the institution of refresher courses.

scholarly journals ‘Pave-and-crack’ technique for the recanalization of severely calcified occlusive aorto-ilio-femoral disease in type-III Leriche syndrome: a case report

2021 ◽  
Vol 5 (2) ◽  
Author(s):  
Sorin Giusca ◽  
Andrej Schmidt ◽  
Grigorios Korosoglou
Keyword(s):  
External Iliac Artery ◽  
Covered Stent ◽  
Radial Force ◽  
Covered Stents ◽  
Leriche Syndrome ◽  
Step Procedure ◽  
Technical Advances ◽  
Radial Forces ◽  
Endovascular Approach ◽  
The Right

Abstract Background  Leriche syndrome is the result of the atherosclerotic occlusion of the distal aorta that may also involve pelvic arteries. The standard treatment for this condition is considered surgical with various techniques available for establishing appropriate flow to both limbs. However, due to the technical advances in the last decades, endovascular approaches are now also capable to tackle such lesions. The ‘pave-and-crack’ technique enables the treatment of severely calcified lesions. This two-step procedure consists of firstly placing a covered stent prothesis (VIABAHN) into the severely calcified segment, which is afterwards aggressively dilated with high-pressure balloons. Subsequently, an interwoven nitinol SUPERA stent with high radial forces is placed within the prothesis. Case summary  Herein, we describe the case of an 81-year-old male patient, who presented with critical limb-threatening ischaemia of his right leg. Doppler ultrasound revealed a long occlusion of the right external iliac artery, common femoral, superficial femoral, and deep femoral artery. The lesion was successfully tackled using antegrade and retrograde punctures and the ‘pave-and-crack’ technique. Discussion  The ‘pave-and-crack’ technique is an endovascular approach for the treatment of severe circumferential calcified lesions. Based on this technique covered stents are initially placed to prevent vessel rupture, which might occur during the aggressive balloon dilatation. Subsequently, the covered stents are relined by interwoven Supera stents, which provide high radial force preventing recoil and restenosis.

Observations on the Provenance of the Thames Valley Pick, Swalecliffe, Kent

1926 ◽  
Vol 5 (2) ◽  
pp. 224-230 ◽  
Author(s):  
F. H. Worsfold
Keyword(s):  
Subject Matter ◽  
Sloping Ground ◽  
Relative Age ◽  
Treasure Trove ◽  
The Road ◽  
University College London ◽  
Exact Position ◽  
The Subject ◽  
London Clay ◽  
The Right

From the Marine Parade, Tankerton, Whitstable, looking East, one obtains a capital view of Tankerton Bay, Swalecliffe, in which my discoveries have been made which are to form the subject matter of this paper. The grassy cliff at Priest and Sow corner at the end of the road stands at 55 O.D. This height gradually declining round the arc of the bay, to die out entirely in the Long Rock occupying the middle distance and through which the Swalecliffe Brook discharges into the sea. Just beyond, a little to the right, are the disused Swalecliffe Brick Works, with Stud Hill and Hampton lying further back. To the left and edging the horizon, Herne Bay Pier is clearly discernable. The accompanying copy of (Plate I.) the 25-in. Ordnance map of this Tankerton Bay section gives the exact position of the 650 yards from the Parish Boundary Stone eastwards indicated thereon with a X in which are found the gravels and brick-earths which have proved so rich in archaeological treasure trove. The whole of this south-easterly directioned well-drained gently sloping ground, from the Priest and Sow corner to the Swalecliffe brook, forms an ideal camping site. Last April a paper was read by me before the Geological Association, at University College, London, entitled “An Examination of the Contents of the Brick Earths and Gravels of Tankerton Bay, Swalecliffe, Kent,” in which the geological aspect of this section was fairly exhaustively treated, so that in this particular it will be unnecessary for me to do more than give a brief summary of the results of that examination as to the relative age and stratigraphical sequence of the Drift material found here overlying the London Clay.

Determination of Resistance to Abrasive Wear. VIII. Influence of Softeners in Tests with the Akron-Croydon and Du Pont Machines

1949 ◽  
Vol 22 (1) ◽  
pp. 259-262
Author(s):  
J. F. Morley
Keyword(s):  
Unit Area ◽  
Published Data ◽  
The Road ◽  
Abrasive Surface ◽  
Abrasive Power ◽  
The Difference ◽  
On The Road ◽  
The Right ◽  
Abrasion Testing

Abstract These experiments indicate that softeners can influence abrasion resistance, as measured by laboratory machines, in some manner other than by altering the stress-strain properties of the rubber. One possible explanation is that the softener acts as a lubricant to the abrasive surface. Since this surface, in laboratory abrasion-testing machines, is relatively small, and comes repeatedly into contact with the rubber under test, it seems possible that it may become coated with a thin layer of softener that reduces its abrasive power. It would be interesting in this connection to try an abrasive machine in which a long continuous strip of abrasive material was used, no part of it being used more than once, so as to eliminate or minimize this lubricating effect. The fact that the effect of the softener is more pronounced on the du Pont than on the Akron-Croydon machine lends support to the lubrication hypothesis, because on the former machine the rate of wear per unit area of abrasive is much greater. Thus in the present tests the volume of rubber abraded per hr. per sq. cm. of abrasive surface ranges from 0.03 to 0.11 cc. on the du Pont machine and from 0.0035 to 0.0045 cc. on the Akron-Croydon machine. On the other hand, if the softener acts as a lubricant, it would be expected to reduce considerably the friction between the abrasive and the rubber and hence the energy used in dragging the rubber over the abrasive surface. The energy figures given in the right-hand columns of Tables 1 and 3, however, show that there is relatively little variation between the different rubbers. As a test of the lubrication hypothesis, it would be of interest to vary the conditions of test so that approximately the same amount of rubber per unit area of abrasive is abraded in a given time on both machines; this should show whether the phenomena observed under the present test conditions are due solely to the difference in rate of wear or to an inherent difference in the type of wear on the two machines. This could most conveniently be done by considerably reducing the load on the du Pont machine. In the original work on this machine the load was standardized at 8 pounds, but no figures are quoted to show how abrasion loss varies with the load. As an addition to the present investigation, it is proposed to examine the effect of this variation with special reference to rubbers containing various amounts and types of softener. Published data on the influence of softeners on the road wear of tire rubbers do not indicate anything like such large effects as are shown by the du Pont machine. This throws some doubt on the value of this machine for testing tire tread rubbers, a conclusion which is confirmed by information obtained from other workers.

An Introduction to Global Health Delivery

2021 ◽  
Author(s):  
Joia Mukherjee ◽  
Paul Farmer
Keyword(s):  
Health Care ◽  
Global Health ◽  
Access To Health Care ◽  
Right To Health ◽  
Treatment Access ◽  
The Road ◽  
Health Delivery ◽  
Positive Side ◽  
Access To Health ◽  
The Right

What has called so many young people to the field of global health is the passion to be a force for change, to work on the positive side of globalization, and to be part of a movement for human rights. This passion stems from the knowledge that the world is not OK. Impoverished people are suffering and dying from treatable diseases, while the wealthy live well into their 80s and 90s. These disparities exist between and within countries. COVID-19 has further demonstrated the need for global equity and our mutual interdependence. Yet the road to health equity is long. People living in countries and communities marred by slavery, colonialism, resource extraction, and neoliberal market policies have markedly less access to health care than the wealthy. Developing equitable health systems requires understanding the history and political economy of communities and countries and working to adequately resource health delivery. Equitable health care also requires strong advocacy for the right to health. In fact, the current era in global health was sparked by advocacy—the activist movement for AIDS treatment access, for the universality of the right to health and to a share of scientific advancement. The same advocacy is needed now as vaccines and treatments are developed for COVID-19. This book centers global health in principles of equity and social justice and positions global health as a field to fulfill the universal right to health.

scholarly journals Characterisation of cyclists’ willingness to pay for green initiatives at Africa’s largest cycle tour

2016 ◽  
Vol 19 (3) ◽  
pp. 432-439
Author(s):  
Melville Saayman ◽  
Waldo Krugell ◽  
Andrea Saayman
Keyword(s):  
Willingness To Pay ◽  
Carbon Footprint ◽  
Climate Change Mitigation ◽  
Demographic Variables ◽  
The Road ◽  
Road Cycling ◽  
Different Types ◽  
On The Road ◽  
The Right ◽  
Change Mitigation

The Cape Argus Pick n Pay Cycle Tour is a major event on the road cycling calendar. The majority of cyclists travel significant distances and participation produces a substantial carbon footprint. This paper examines participants’ willingness to pay to offset their carbon footprint. The purpose of this paper is to make a contribution to the literature by linking willingness to pay to attitudes towards or beliefs (green views) about the initiatives in place, to ensure a greener cycle tour. Factor analysis is used to identify different types of cyclists, based on their green views: those with green money, those who prefer green products and the “re-cyclers”. The results of the regression analysis reveal that socio-demographic variables and the right attitude towards the environment are significant predictors of stated willingness to pay for climate change mitigation.

scholarly journals Lane Change Behavior on Freeways: An Online Survey Using Video Clips

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
V. L. Knoop ◽  
M. Keyvan-Ekbatani ◽  
M. de Baat ◽  
H. Taale ◽  
S. P. Hoogendoorn
Keyword(s):  
Online Survey ◽  
Simulation Models ◽  
Lane Changes ◽  
The Road ◽  
Video Clips ◽  
Road Capacity ◽  
Change Behavior ◽  
Instrumented Vehicle ◽  
The Moment ◽  
The Right

Freeways form an important part of the road network. Yet, driving behavior on freeways, in particular lane changes and the relation with the choice of speed, is not well understood. To overcome this, an online survey has been carried out. Drivers were shown video clips, and after each clip they had to indicate what they would do after the moment the video stopped. A total of 1258 Dutch respondents completed the survey. The results show that most people have a strategy to choose a speed first and stick to that, which is the first strategy. A second, less often chosen, strategy is to choose a desired lane and adapt the speed based on the chosen lane. A third strategy, slightly less frequently chosen, is that drivers have a desired speed, but contrary to the first strategy, they increase this speed when they are in a different lane overtaking another driver. A small fraction have neither a desired speed nor a desired lane. Of the respondents 80% use the right lane if possible, and 80% avoid overtaking at the right. Also 80% give way to merging traffic. The survey was validated by 25 survey respondents also driving an instrumented vehicle. The strategies in this drive were similar to those in the survey. The findings of this work can be implemented in traffic simulation models, e.g., to determine road capacity and constraints in geometric design.

A New Highway Safety Model Based on Cellular Automata

2014 ◽  
Vol 989-994 ◽  
pp. 2340-2343
Author(s):  
Li Xing Li
Keyword(s):  
Cellular Automata ◽  
Energy Conservation ◽  
Traffic Safety ◽  
Conservation Law ◽  
Highway Safety ◽  
Traffic Density ◽  
New Model ◽  
The Road ◽  
The Right ◽  
Energy Conservation Law

With the growth of the total mileage of highway. There is great importance in studying highway safety. At the present time, there are little research on traffic safety with the consideration of the Keep-Right-Except-To-Pass Rule, which requires drivers to drive in the right-most lane unless they are passing another vehicle. Based on Cellular Automata, this paper constructs a new model of highway safety with the consideration of the particular Rule. To evaluate the safety of the road, the model proposes a new index based on energy conservation law. After the simulation, the result shows the best traffic density to balance the safety and traffic flux is 20.1133veh/km.

Response to Joseph E. Lowndes' review of Trucking Country: The Road to America's Wal-Mart Economy

2009 ◽  
Vol 7 (2) ◽  
pp. 378-379
Author(s):  
Shane Hamilton
Keyword(s):  
The Road ◽  
The Right

Joseph Lowndes questions whether the independent truckers I write about were “central to the rise of the Right.” He suggests that truckers were mere dupes of “the architects of the modern Right,” who “selectively appropriated various forms of discontent in the land and turned it to their own purposes.” I disagree for at least three reasons.

scholarly journals Possibilities of Spatial Data to Determine the Extent of the Occupancy of the Right-of-Way by Large-Format Advertisements

2017 ◽  
Vol 25 (2) ◽  
pp. 5-19
Author(s):  
Agnieszka Bieda ◽  
Anita Kwartnik-Pruc ◽  
Edyta Puniach
Keyword(s):  
Spatial Data ◽  
Objective Assessment ◽  
Common Element ◽  
Real Property ◽  
Large Format ◽  
The Road ◽  
Noticeable Increase ◽  
Right Of Way ◽  
The Right ◽  
Real Estate Management

Abstract Large-format advertisements are becoming a more and more common element of building facades, especially in city centers. Placing an object of this type is not without significance to the real property management. A large-format advertising billboard on the facade, on the one hand, is associated with the possibility of renting advertising space, on the other - it can lead to the occupancy of a right-of-way, which results in a necessity to pay appropriate fees, in the amount regulated by the Act on Public Roads. Placing an object such as a large-format advertising billboard in a right-of-way requires a permit of the manager of this road. However, if a billboard is located on the facade of a building, occupancy of the right-of-way is not always the case. If the boundary of the road parcel runs along the contour of the building, a billboard placed on the elevation will always occupy the right-of-way. However, property boundaries often run at a distance from the building. Such situations - desired by managers - result in a noticeable increase in demand for surveying opinions to determine what part of the right-of-way is occupied by a large-format advertisement. This article analyzes the cases of the right-of-way being occupied by large-format advertising placed on the facades of buildings in the city center. For selected objects, information was obtained from public records, National Cartographic Documentation Center database, and direct surveying was performed with various techniques. This allowed for an objective assessment of the possible use of available surveying methods and the acquired spatial data to determine the right-of-way occupied by large-format advertisements for purposes of real estate management.

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