scholarly journals Recent History of Upgrades to the U.S. National Lightning Detection Network

2020 ◽  
Author(s):  
Martin J. Murphy ◽  
John A. Cramer ◽  
Ryan K. Said
Keyword(s):  
Detection Efficiency ◽  
Processing System ◽  
Sensor Data ◽  
Recent History ◽  
Central Processor ◽  
Central Processing ◽  
Lightning Detection ◽  
History Of ◽  
Location Algorithm ◽  
The U.S

AbstractThe U.S. National Lightning Detection Network (NLDN) underwent a complete sensor upgrade in 2013 followed by a central processor upgrade in 2015. These upgrades produced about a factor-of-five improvement in the detection efficiency of cloud lightning flashes and about one additional cloud pulse geo-located per flash. However, they also re-aggravated a historical problem with the tendency to misclassify a population of low-current positive discharges as cloud-to-ground strokes when, in fact, most are probably cloud pulses. Furthermore, less than 0.1% of events were poorly geo-located because the contributing sensor data were either improperly associated or simply under-utilized by the geo-location algorithm. To address these issues, Vaisala developed additional improvements to the central processing system, which became operational on November 7, 2018. This paper describes updates to the NLDN between 2013-2018 and then focuses on the effects of classification algorithm changes and a simple means to normalize classification across upgrades.

Performance evaluation of the U.S. National Lightning Detection Network in eastern New York: 1. Detection efficiency

1998 ◽  
Vol 103 (D8) ◽  
pp. 9045-9055 ◽  
Author(s):  
Vincent P. Idone ◽  
Daniel A. Davis ◽  
Paul K. Moore ◽  
Yan Wang ◽  
Ronald W. Henderson ◽  
...  
Keyword(s):  
New York ◽  
Performance Evaluation ◽  
Detection Efficiency ◽  
Lightning Detection ◽  
The U.S

Tarakkvlkv (Land of Palms)

2017 ◽  
Author(s):  
Maureen Mahoney
Keyword(s):  
Collective Memory ◽  
Oral History ◽  
Settlement Patterns ◽  
Early Years ◽  
Recent History ◽  
Oral Histories ◽  
History Of ◽  
The U.S

The recent history of the Brighton reservation is contained in the settlement patterns of the camps established by the various groups moving onto lands of a hostile government. Collective memory is transferred through oral histories, but the patterns that emerge can be viewed through a broad temporal lens to reveal the sociocultural motivations of the broader population. The location of camps near the periphery of the reservation in the early years speaks to the mistrust of the families concerned about the ease of escape should they find themselves in peril from the U.S. government. Two decades later the clustering of camps near schools, roads, and trading stores demonstrates a transition and connectedness to the non-Seminole world. These years were certainly formative in the history of the Tribe. GIS is the tool the THPO uses to draw together oral history and archaeological information in the telling of these important stories.

The Sentence Is the Story

2018 ◽  
pp. 94-122
Author(s):  
Peggy Kamuf
Keyword(s):  
Death Penalty ◽  
Capital Punishment ◽  
Walter Benjamin ◽  
Narrative Structure ◽  
Recent History ◽  
History Of ◽  
The U.S

This chapter takes up Norman Mailer’s 1979 novel The Executioner’s Song as chronicle of the “modern death penalty” era post-Gregg v. Georgia. Two questions or issues frame my analysis: the relation between narrative structure in general and the death penalty plot; the distinction between execution and suicide. The first issue is explored with the help of narratologists, but especially Walter Benjamin. The second reviews Kant’s argument that “no one can will [capital] punishment” and Derrida’s remarks, contra Kant, on the undecidability of execution and suicide. The chapter concludes with a brief reading of Mailer’s 1964 poem of the same title as his novel and speculates on how these two texts read the recent history of the U.S. death penalty.

U.S.-Mexican Relations: The 1980s and Beyond

1985 ◽  
Vol 27 (1) ◽  
pp. 91-101
Author(s):  
Peter H. Smith
Keyword(s):  
Economic Crisis ◽  
The Other ◽  
Recent History ◽  
International Debt ◽  
Intergovernmental Cooperation ◽  
Bilateral Relations ◽  
The Future ◽  
History Of ◽  
High Degree ◽  
The U.S

That does the future hold for U.S.-Mexican relations? Optimistic assessments usually point to the high degree of interpenetration between the two societies, the recent history of intergovernmental cooperation, and the commonality of basic interests. Developments in one country have significant impact on the other, a process that now works both ways: the 1982 economic crisis in Mexico created serious difficulties for retailers on the U.S. side of the border, Mexico's subsequent cutbacks in imports prompted the loss of 200,000 jobs in the U.S., and Mexico's struggles with its international debt have crucial implications for banks in the U.S. Each country needs the other, and this kind of “interdependence” creates mutuality of purpose. According to this logic, the rational pursuit of national goals will build and fortify harmonious bilateral relations.

Physiologic Measures In Patients with PTSD with and Without A Recent History of Alcohol Abuse

2007 ◽  
Author(s):  
Eileen Ahearn ◽  
Mary Mussey ◽  
Catherine Johnson ◽  
Amy Krohn ◽  
Timothy Juergens ◽  
...  
Keyword(s):  
Alcohol Abuse ◽  
Recent History ◽  
History Of

Fictive Mode, ‘Journey to the West’, and Transformation of Space: ‘Ali Mubarak’s Discourses of Modernization

2007 ◽  
Vol 4 (3) ◽  
pp. 331-358
Author(s):  
WEN-CHIN OUYANG
Keyword(s):  
Cultural Transformation ◽  
Recent History ◽  
Theoretical Principle ◽  
Time And Space ◽  
The West ◽  
Arab Culture ◽  
History Of ◽  
Journey To The West

I begin my exploration of ‘Ali Mubarak (1823/4–1893) and the discourses on modernization ‘performed’ in his only attempt at fiction, ‘Alam al-Din (The Sign of Religion, 1882), with a quote from Guy Davenport because it elegantly sums up a key theoretical principle underpinning any discussion of cultural transformation and, more particularly, of modernization. Locating ‘Ali Mubarak and his only fictional work at the juncture of the transformation from the ‘traditional’ to the ‘modern’ in the recent history of Arab culture and of Arabic narrative, I find Davenport's pronouncement tantalizingly appropriate. He not only places the stakes of history and geography in one another, but simultaneously opens up the imagination to the combined forces of time and space that stand behind these two distinct yet related disciplines.

An American Language

2018 ◽  
Author(s):  
Rosina Lozano
Keyword(s):  
United States ◽  
National Policy ◽  
The United States ◽  
Spanish Language ◽  
Spanish Speakers ◽  
Language Recognition ◽  
Political Language ◽  
Political Issue ◽  
History Of ◽  
The U.S

An American Language is a political history of the Spanish language in the United States. The nation has always been multilingual and the Spanish language in particular has remained as an important political issue into the present. After the U.S.-Mexican War, the Spanish language became a language of politics as Spanish speakers in the U.S. Southwest used it to build territorial and state governments. In the twentieth century, Spanish became a political language where speakers and those opposed to its use clashed over what Spanish's presence in the United States meant. This book recovers this story by using evidence that includes Spanish language newspapers, letters, state and territorial session laws, and federal archives to profile the struggle and resilience of Spanish speakers who advocated for their language rights as U.S. citizens. Comparing Spanish as a language of politics and as a political language across the Southwest and noncontiguous territories provides an opportunity to measure shifts in allegiance to the nation and exposes differing forms of nationalism. Language concessions and continued use of Spanish is a measure of power. Official language recognition by federal or state officials validates Spanish speakers' claims to US citizenship. The long history of policies relating to language in the United States provides a way to measure how U.S. visions of itself have shifted due to continuous migration from Latin America. Spanish-speaking U.S. citizens are crucial arbiters of Spanish language politics and their successes have broader implications on national policy and our understanding of Americans.

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