Short Period S Wave Attenuation under the United States

1978 ◽  
Author(s):  
Eugene Smart ◽  
Zoltan Der ◽  
Audrey Chaplin
Keyword(s):  
United States ◽  
Wave Attenuation ◽  
The United States ◽  
S Wave ◽  
Short Period

Short-period P-wave attenuation along various paths in North America as determined from P-wave spectra of the SALMON nuclear explosion

1976 ◽  
Vol 66 (5) ◽  
pp. 1609-1622 ◽  
Author(s):  
Zoltan A. Der ◽  
Thomas W. McElfresh
Keyword(s):  
United States ◽  
North America ◽  
Wave Attenuation ◽  
Nuclear Explosion ◽  
P Wave ◽  
Western United States ◽  
Source Spectrum ◽  
Wave Spectra ◽  
Short Period ◽  
Q Values

abstract Average Q values were determined for ray paths to various LRSM stations from the SALMON nuclear explosion by taking ratios of observed P-wave spectra to the estimated source spectrum. Most Q values for P-wave paths throughout eastern North America are in the range 1600 to 2000 while those crossing over into the western United States are typically around 400 to 500. These differences in Q for intermediate distances can sufficiently explain the differences in the teleseismic event magnitudes observed, 0.3 to 0.4 magnitude units, in the western versus the eastern United States, if one assumes that the low Q layer under the western United States is located at depths less than 200 km.

scholarly journals Regional Attenuation of Short-Period P and S Waves in the United States

1975 ◽  
Vol 40 (1) ◽  
pp. 85-106 ◽  
Author(s):  
Z. A. Der ◽  
R. P. Masse ◽  
J. P. Gurski
Keyword(s):  
United States ◽  
The United States ◽  
S Waves ◽  
Short Period

Police Body Cameras and Professional Responsibility: Public Records and Private Evidence

2017 ◽  
Vol 46 (1) ◽  
pp. 41-51 ◽  
Author(s):  
Stacy E. Wood
Keyword(s):  
United States ◽  
Police Officers ◽  
Media Coverage ◽  
Ethical Issues ◽  
The United States ◽  
Black Communities ◽  
District Attorneys ◽  
Short Period ◽  
Private Citizens ◽  
Video Documentation

Abstract:Extensive media coverage has focused attention on the disproportionate frequency and severity of police use of force against black communities in the United States. Video documentation captured by public officials and private citizens aided by the ubiquity of cell phones has made this violence inescapable, enabling conversations of system-wide problems within a mainstream context. Video documentation has been posed as a means of increasing transparency on the part of police and the district attorneys tasked with the decision of whether or not a police shooting requires the indictment of an officer. This documentation is also simultaneously posed as a check against the unmitigated authority of officer testimony, as a financial windfall for companies selling the technology, and as the ultimate exoneration for police officers attempting to justify their decisions in the field. These concurrent rhetorical registers operate in different domains and rarely overlap. The enormous amount of attention that has been focused on body-camera programs belies a techno-utopian impulse, an investment in a technological fix to complex and interlocking historical and socio-political realities. With this attention, funding has followed, pre-existing body-camera programs have been extended, and pilot programs have launched, presenting new challenges for police departments whose resources cannot meet the fiscal demands of a dramatic technological shift in a short period of time. Similarly, policies and laws regarding these devices themselves as well as the footage they capture have been sluggish to coalesce around coherent principles. This paper examines the emergent markets, policies, and laws governing the footage captured by police-worn body cameras in the United States and employs this footage as a way to reckon with complex ethical issues for information professionals.

scholarly journals Study on the Model Construction of Power Transfer Movement from the Perspective of China`s International Relations

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Baixu Duan ◽  
Jia Tang
Keyword(s):  
United States ◽  
Cold War ◽  
Soviet Union ◽  
International Relations ◽  
The United States ◽  
Mechanism Model ◽  
The Soviet Union ◽  
Modelling Analysis ◽  
Short Period ◽  
International Power

Power plays a fundamental role in the system in the international relations. Basie on Game Theory, and by the assumption that the total amount of power is relatively constant in a short period of time, this paper makes a modelling analysis of the "take-and-give" movement of power among rational countries. Based on building the curve of power taken and the curve of power given, the power balance mechanism model and the power movement track model are constructed. We also make an analysis and by the examples. In the current situation, this paper agrees with the view of most scholars. China and the United States have opened a "cold war" different from the United States and the Soviet Union. With the coordination between the PRC-US relations, it is concluded that a stable international power mechanism requires the active cooperation of all countries, which could promote the power operation to reach the equilibrium point. The analysis method of power movement can explain the cause, progress, and trend of Sino US cold war to a certain extent.

scholarly journals COVID-19: Ophthalmological Aspects of the SARS-CoV 2 Global Pandemic

2020 ◽  
Vol 237 (05) ◽  
pp. 675-680 ◽  
Author(s):  
Jakob Siedlecki ◽  
Victor Brantl ◽  
Benedikt Schworm ◽  
Wolfgang Johann Mayer ◽  
Maximilian Gerhardt ◽  
...  
Keyword(s):  
United States ◽  
American Academy ◽  
United States Of America ◽  
Case Reports ◽  
The United States ◽  
Systematic Analysis ◽  
Global Pandemic ◽  
Short Period ◽  
Growing Body ◽  
Practical Recommendations

Abstract Purpose To perform a systematic analysis of articles on the ophthalmological implications of the global COVID-19 pandemic. Methods PubMed.gov was searched for relevant articles using the keywords “COVID-19”, “coronavirus”, and “SARS-CoV-2” in conjunction with “ophthalmology” and “eye”. Moreover, official recommendations of ophthalmological societies were systematically reviewed, with a focus on the American Academy of Ophthalmology (AAO) and the Royal College of Ophthalmologists (RCOphth). Results As of April 16, 2020, in total, 21 peer-reviewed articles on the ophthalmological aspects of COVID-19 were identified. Of these, 12 (57.1%) were from Asia, 6 (28.6%) from the United States of America, and 3 (14.3%) from Europe. There were 5 (23.8%) original studies, 10 (47.6%) letters, 3 (14.2%) case reports, and 3 (14.2%) reviews. These articles could be classified into the topics “Modes and prevention of (ocular) transmission”, “Ophthalmological manifestations of COVID-19”, “Clinical guidance concerning ophthalmological practice during the COVID-19 pandemic”, and “Practical recommendations for clinical infrastructure”. Practical recommendations could be extracted from official statements of the AAO and the RCOphth. Conclusion Within a short period, a growing body of articles has started to elucidate the ophthalmological implications of COVID-19. As the eye can represent a route of infection (actively via tears and passively via the nasoacrimal duct), ophthalmological care has to undergo substantial modifications during this pandemic. In the eye, COVID-19 can manifest as keratoconjunctivitis.

Globalizing Diaspora

2021 ◽  
pp. 408-430
Author(s):  
Tobias Brinkmann
Keyword(s):  
United States ◽  
Soviet Union ◽  
Eastern Europe ◽  
Western Europe ◽  
The United States ◽  
Small Towns ◽  
Mass Migration ◽  
The Soviet Union ◽  
Short Period ◽  
European Jewish

Between the 1860s and the early 1920s, more than two million Jews moved from small towns in Eastern Europe to the United States. Smaller groups went to other destinations in the Americas, Western Europe, Palestine, and South Africa. This chapter discusses the background and impact of that mass migration around the world. The global diffusion of Jews from Eastern Europe concentrated in three new Jewish centers: the United States, the Soviet Union, and Israel. The Eastern European Jewish mass migration, however, did not ultimately lead to the formation of a distinct diaspora of Yiddish-speaking Jews, but rather became the driving force behind a dramatic transformation of the Jewish diaspora as a whole. The reasons for this can be explained by several factors: accelerated Jewish assimilation in these centers, the short period of the mass migration, the great diversity of the migrants, and the almost complete destruction of Jewish life and culture in Eastern Europe during the Holocaust.

Public Pension Reforms in the United States and Japan

1991 ◽  
Vol 24 (1) ◽  
pp. 100-126 ◽  
Author(s):  
JUNKO KATO
Keyword(s):  
United States ◽  
The United States ◽  
Public Pension ◽  
Political Strategy ◽  
Political Systems ◽  
Pension Systems ◽  
Reform Legislation ◽  
Short Period ◽  
Democratic Systems ◽  
Policy Proposals

In the early 1980s, facing the financial crises in their public pension systems, the governments of both the United States and Japan proposed reform. In each case the reform efforts failed. A few years later policy proposals by special commissions led to the enactment of reform legislation in both countries. No major political upheavals occurred in the intervening years; but in both cases, failure turned into success in a short period. The article demonstrates that similar shifts in political strategy (the use of special commissions) produced parallel outcomes (the benefits cut reforms). This study points to the universal components of political strategy in democratic systems at the same time as it emphasizes the distinctive feature of the American and Japanese political systems.

Sign in / Sign up

Export Citation Format

Share Document