The Creation of Cab Signaling

2019 ◽  
Author(s):  
John Hofbauer
Keyword(s):  
The United States ◽  
Light Rail ◽  
Signaling System ◽  
Signaling Systems ◽  
Train Control ◽  
North East ◽  
The North ◽  
Rail Systems ◽  
The Us ◽  
Pennsylvania Railroad

Cab signaling enforces the separation between trains as well as enforcing trains to reduce speed as the train approaches signals displaying STOP. Cab signaling allow for and provides a safe way to eliminate the number of wayside automatic signals while the number of controlled speeds can be increased. Light Rail Transit (LRT) systems today are built completely with cab signaling and only fixed wayside signals are placed at interlockings for routing information. Experimental cab signaling systems began in the United States in the 1920s, kicked off by the Interstate Commerce Commission (ICC) ruling that required some form of Automatic Train Control (ATC) be installed on one passenger division by 1925. This paper will begin with examining the initial ATC designs (intermediate and continuous), the first experimental installations, the testing challenges and the overall enhancements that pioneered cab signaling systems in the US. The focus will include the teaming of the Pennsylvania Railroad with Union Switch and Signal (US&S) to develop, build and successfully test the continuous cab signaling system which later became the de facto standard. The early systems implemented used two (2) speeds, methods on adding a third speed and how the system became integrated with the existing automatic block signaling. How Pennsylvania Railroad (currently Amtrak) is still using the technology that started 100 years ago on the North East Corridor. It will also introduce how Light Rail systems operate on speed commands using cab codes.

scholarly journals Quebec’s Economic and Commercial Linkages with the United States, 1994–2017

2017 ◽  
Author(s):  
Earl H. Fry
Keyword(s):  
United States ◽  
Trade Agreement ◽  
The United States ◽  
The North ◽  
Nation States ◽  
Wide Range ◽  
The Us ◽  
Us Government ◽  
Big Picture ◽  
The Impact

This article examines the ebb and flow of the Quebec government’s economic and commercial relations with the United States in the period 1994–2017. The topic demonstrates the impact of three major forces on Quebec’s economic and commercial ties with the US: (1) the North American Free Trade Agreement (NAFTA) which became operational in 1994 and was fully implemented over a 15-year period; (2) the onerous security policies put in place by the US government in the decade following the horrific events of 11 September 2001; and (3) changing economic circumstances in the United States ranging from robust growth to the worst recession since the Great Depression of the 1930s. The article also indicates that the Quebec government continues to sponsor a wide range of activities in the United States, often more elaborate and extensive than comparable activities pursued by many nation-states with representation in the US. 1 1 Stéphane Paquin, ‘Quebec-U.S. Relations: The Big Picture’, American Review of Canadian Studies 46, no. 2 (2016): 149–61.

scholarly journals Rethinking the Security Architecture of North East Asia

2010 ◽  
Vol 41 (2) ◽  
pp. 273
Author(s):  
Michael J Kelly ◽  
Sean Watts
Keyword(s):  
United States ◽  
East Asia ◽  
North Korea ◽  
The United States ◽  
United Nations Security Council ◽  
Collective Security ◽  
North East ◽  
The North ◽  
The Government ◽  
The Cold War

In the aftermath of the Cold War, many began to question the continuing efficacy, or at least call for reform, of collective security structures such as the North Atlantic Treaty Organization and the United Nations Security Council. Yet, North East Asia never enjoyed a formal, institutionalised collective security structure. As Russia and the United States recede and China emerges in North East Asia, this article questions whether now is the time to consider such an arrangement. Financially, Japan and South Korea are locked into a symbiotic relationship with China (as is the United States), while the government in Beijing continues to militarise and lay territorial and maritime claims to large areas of the region. Moreover, the regime in North Korea, with its new nuclear capabilities, remains unpredictable. Consequently, central components to the question of collective security in North East Asia are the equally vexing questions of what to do about North Korea and whether a new formalised security arrangement would include or exclude the People's Republic of China.

scholarly journals THE GENESIS OF THE US FOREIGN POLICY: THE ORIGIN OF THE HISTORIOGRAPHY OF THE TOPIC, 1610–1820S

2021 ◽  
Vol 7 (73) (2) ◽  
pp. 81-93
Author(s):  
D. V. Dorofeev
Keyword(s):  
United States ◽  
Foreign Policy ◽  
International Relations ◽  
North American ◽  
Alternative Hypothesis ◽  
The United States ◽  
Us Foreign Policy ◽  
Founding Fathers ◽  
The North ◽  
The Us

The research is devoted to the study of the origin of the historiography of the topic of the genesis of the US foreign policy. The key thesis of the work challenges the established position in the scientific literature about the fundamental role of the work of T. Lyman, Jr. «The diplomacy of the United States: being an account of the foreign relations of the country, from the first treaty with France, in 1778, to the Treaty of Ghent in 1814, with Great Britain», published in 1826. The article puts forward an alternative hypothesis: the emergence of the historiography of the genesis of the foreign policy of the United States occurred before the beginning of the second quarter of the XIX century – during the colonial period and the first fifty years of the North American state. A study of the works of thirty-five authors who worked during the 1610s and 1820s showed that amater historians expressed a common opinion about North America’s belonging to the Eurocentric system of international relations; they were sure that both the colonists and the founding fathers perceived international processes on the basis of raison d’être. The conceptualization of the intellectual heritage of non-professional historians allowed us to distinguish three interpretations of the origin of the United States foreign policy: «Autochthonous» – focused on purely North American reasons; «Atlantic» – postulated the borrowing of European practice of international relations by means of the system of relations that developed in the Atlantic in the XVII–XVIII centuries; «Imperial» – stated the adaptation of the British experience. The obtained data refute the provisions of scientific thought of the XX–XXI centuries and create new guidelines for further study of the topic.

National Report for the United States

2012 ◽  
Keyword(s):  
The United States ◽  
Economic Productivity ◽  
Section 8 ◽  
North American Continent ◽  
Us Congress ◽  
The North ◽  
The Us ◽  
Us Constitution ◽  
State And Local ◽  
New Nation

The ‘New World’ on the North American continent was founded in the 1600s on colonists’ willingness to take substantial risks. The notion of relieving at least some of the burdens of inevitable failure, in order to encourage productive risk-taking, has been part of the fabric of US law almost from the very beginning. After discovering that jailing debtors did very little to encourage fulfilment of debts, and it in fact depressed the economic productivity on which the colonies’ survival depended, several of the colonies experimented with limited insolvency and bankruptcy laws in the mid-1700s. After the Revolution, the issue of providing uniform and nationwide bankruptcy relief was enshrined in the US Constitution as part of the very foundation of the new nation. While the new US Congress was granted only limited rights to regulate general economic matters (the most significant such rights being reserved to the state and local legislative bodies), Article I, section 8, clause 4 of the US Constitution explicitly vested the federal Congress with the power to regulate bankruptcy.

scholarly journals The prevalence of MS in the United States

Neurology ◽  
2019 ◽  
Vol 92 (10) ◽  
pp. e1029-e1040 ◽  
Author(s):  
Mitchell T. Wallin ◽  
William J. Culpepper ◽  
Jonathan D. Campbell ◽  
Lorene M. Nelson ◽  
Annette Langer-Gould ◽  
...  
Keyword(s):  
United States ◽  
Census Data ◽  
Adult Population ◽  
The United States ◽  
Health Claims ◽  
The North ◽  
Time Period ◽  
The Us ◽  
Group A ◽  
Us Census

ObjectiveTo generate a national multiple sclerosis (MS) prevalence estimate for the United States by applying a validated algorithm to multiple administrative health claims (AHC) datasets.MethodsA validated algorithm was applied to private, military, and public AHC datasets to identify adult cases of MS between 2008 and 2010. In each dataset, we determined the 3-year cumulative prevalence overall and stratified by age, sex, and census region. We applied insurance-specific and stratum-specific estimates to the 2010 US Census data and pooled the findings to calculate the 2010 prevalence of MS in the United States cumulated over 3 years. We also estimated the 2010 prevalence cumulated over 10 years using 2 models and extrapolated our estimate to 2017.ResultsThe estimated 2010 prevalence of MS in the US adult population cumulated over 10 years was 309.2 per 100,000 (95% confidence interval [CI] 308.1–310.1), representing 727,344 cases. During the same time period, the MS prevalence was 450.1 per 100,000 (95% CI 448.1–451.6) for women and 159.7 (95% CI 158.7–160.6) for men (female:male ratio 2.8). The estimated 2010 prevalence of MS was highest in the 55- to 64-year age group. A US north-south decreasing prevalence gradient was identified. The estimated MS prevalence is also presented for 2017.ConclusionThe estimated US national MS prevalence for 2010 is the highest reported to date and provides evidence that the north-south gradient persists. Our rigorous algorithm-based approach to estimating prevalence is efficient and has the potential to be used for other chronic neurologic conditions.

Manage Successful Brownfield Applications

2018 ◽  
Author(s):  
Jian Sun ◽  
Kevin Blostic
Keyword(s):  
Mixed Mode ◽  
System Capacity ◽  
Signaling System ◽  
Maintenance Costs ◽  
Signaling Systems ◽  
Train Control ◽  
Operation And Maintenance ◽  
Track Circuit ◽  
Railroad Applications ◽  
New System

This paper provides a unique perspective on successful brownfield railroad applications. It presents realistic challenges and solutions when applying a turnkey solution with a replacement or an overlay system. Brownfield commissioning takes place when an existing infrastructure is to upgrade to a new system with a different technology than the incumbent one. As signaling systems are getting more and more complex, it is extremely important to maintain robustness in the system design as well as project execution, such as logistics, documentation, and issue reporting. Many transportation authorities are moving from their current train control signaling system to a new system to combat obsolescence issues, to gain better system capacity, and to lower operation and maintenance costs. This paper discusses brownfield commissioning in general, and also presents specific cases in migration from a track circuit interlocking system to a Communications Based Train Control (CBTC) system. These two systems have distinct characteristics that provide opportunities of coexistence, but also introduce difficulties in mixed-mode operations.

Characterizing healthcare delivery in the United States using Census Bureau’s County Business Patterns (2000–2016)

2020 ◽  
Vol 41 (6) ◽  
pp. 723-728
Author(s):  
Astha KC ◽  
Melissa K. Schaefer ◽  
Nimalie D. Stone ◽  
Joseph Perz
Keyword(s):  
Long Term Care ◽  
Healthcare Delivery ◽  
The United States ◽  
Healthcare Sector ◽  
Nursing Facilities ◽  
Term Care ◽  
The North ◽  
The Us ◽  
Care Facilities

AbstractBackground:The US Census Bureau’s County Business Patterns (CBP) series provides a unique opportunity to describe the healthcare sector using a single, national data source.Methods:We analyzed CBP data on business establishments in the healthcare industry for 2000–2016 for all 50 states and the District of Columbia. Setting and facility types were defined using the North American Industry Classification System.Results:In 2016, CBP enumerated 707,634 US healthcare establishments (a 34% increase from 2000); 86.5% were outpatient facilities and services followed by long-term care facilities (12.5%) and acute-care facilities (1.0%). Between 2000 and 2016, traditional facilities such as general medical surgical and surgical hospitals (−0.4%) and skilled nursing facilities (+0.1%) decreased or remained flat, while other long-term care and outpatient providers grew rapidly.Conclusion:This analysis highlights the steady growth and increased specialization of the US healthcare sector, particularly in long-term care and outpatient settings.

Codification and Automation of Psychiatric Data: the CAPRICE System

1973 ◽  
Vol 123 (575) ◽  
pp. 471-474 ◽  
Author(s):  
M. Valentine
Keyword(s):  
United States ◽  
United States Of America ◽  
Clinical History ◽  
The United States ◽  
Check List ◽  
North East ◽  
The North ◽  
Patient’S Experience ◽  
Comprehensive Listing ◽  
Psychiatric State

In the United States of America, many centres are now running automated data programmes in the psychiatric field (Kline and Laska, 1968; Ulett and Sletten, 1971). In Britain, such developments have been much more restricted; prominent examples however are the North-East Scotland psychiatric register, and the Maudsley Hospital—Institute of Psychiatry check-list, together with the Camberwell register. As a clinical itemization, the ‘Present Psychiatric State’ (Wing et al., 1967) presents a comprehensive listing of over 400 symptoms, the evaluation being confined to the previous four weeks of the patient's experience. This is a valuable research tool, but for routine clinical history requirements it would be both too detailed and, by definition, too limited in scope.

Rethinking United States–Caribbean relations: towards a new mode of trans-territorial governance

2000 ◽  
Vol 26 (1) ◽  
pp. 69-82 ◽  
Author(s):  
ANTHONY PAYNE
Keyword(s):  
United States ◽  
International Relations ◽  
International System ◽  
The United States ◽  
The North ◽  
The Us ◽  
The Caribbean ◽  
The Relationship ◽  
Different Order

United States–Caribbean relations over the period of the last thirty or forty years have rarely—if ever—been analysed in a thoroughly satisfying way. It is a strange omission in the international relations literature given the proximity of the United States to the Caribbean, and vice versa. But the fact is that most accounts of the relationship have fallen prey to a powerful, but ultimately misleading, mythology by which small, poor, weak, dependent entities in the Caribbean have either created trouble for, or alternatively been confronted by, the ‘colossus to the north’ that is the United States in whose ‘backyard’ they unfortunately have to reside. Virtually all analysts of the US–Caribbean relationship have thus drawn a picture marked at heart by the notion of an inherently unequal struggle between forces of a different order and scale. Within this broad metaphor the only major difference of interpretation has reflected the competing theories of power in the international system developed by the realist and structuralist schools.

Sectionalism and Policy Formation in the United States: President Carter's Welfare Initiatives

1996 ◽  
Vol 26 (3) ◽  
pp. 337-367 ◽  
Author(s):  
Desmond King
Keyword(s):  
Family Support ◽  
The United States ◽  
Policy Formation ◽  
Jimmy Carter ◽  
Archival Material ◽  
The North ◽  
Family Support Act ◽  
The Family ◽  
The Us ◽  
North And South

President Jimmy Carter twice attempted to enact major reforms of the US welfare system. Using archival material from the Carter Presidential Library, this article argues that one major reason for the failure of both initiatives was the persistence of regional divisions between representatives from the north and south in the Congress. This factor is as germane to the welfare failure as poor presidential-congressional relations and changes to the committee seniority system in the Congress. American welfare programmes were institutionalized in such a way that, from the 1930s, building a coalition across sectional interests (as represented by members of the Congress) was nearly impossible: gains to one region constituted losses to the other. The consequence of the way Carter pursued and failed to achieve welfare reform was to enhance the priorities, particularly ‘working for welfare’, exploited by Reagan in the final year of his administration when the Family Support Act was enacted.

Sign in / Sign up

Export Citation Format

Share Document