Looking back: a history of marine seismic exploration

When looking back into the history of botulism and contemplating the final understanding of the syndrome and the ultimate solutions, there are four facets that stand out clearly. The first is that much of the solution was guided by astute observations, curious travellers, committed veterinarians and particularly farmers themselves who were able to relate the occurrence of the condition to climatic and grazing conditions. Secondly, there was the identification of the osteophagia and pica syndrome which led to the feeding of bone-meal as a successful mitigating measure as well as the establishment that botulism was not due to a plant poisoning. Thirdly, the solution of the problem depended on the integration of experience and knowledge from diverse disciplines such as soil science, animal behaviour and husbandry, nutrition, botany and ultimately advanced bacteriology and the science of immunology. Finally it required the technical advancement to produce toxoids in large quantities and formulate effective aluminium hydroxide precipitated and oil emulsion vaccines.

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Looking back

Dental Nursing ◽

10.12968/denn.2021.17.11.556 ◽

2021 ◽

Vol 17 (11) ◽

pp. 556-557

Author(s):

Jacqui Elsden

Keyword(s):

British Association ◽

History Of ◽

Looking Back

Jacqui Elsden explores the history of the British Association of Dental Nurses

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“Preamble” to a Constitution for New Confederation of European nations: text and context

Public Administration ◽

10.22394/2070-8378-2021-23-1-51-55 ◽

2021 ◽

Vol 23 (1) ◽

pp. 51-55

Author(s):

DAVID ENGELS ◽

Keyword(s):

Social Development ◽

Middle Ages ◽

21St Century ◽

Political Action ◽

Official Position ◽

Political Program ◽

History Of ◽

Key Policy ◽

Looking Back ◽

The Eu

The idea of protecting the European essence from collapse due to modern challenges (migration, terrorism, tensions between the EU and Asia, threats from the Middle East, discord in relations with Russia) is not new and has been discussed many times by many researchers. The author offers his solution for these and many other challenges. His vision of united Europe is offered in the preamble to the Constitution of a new confederation of European nations. This text is not an official position for political action or propaganda. This message is necessary to broaden the horizons for those Europeans who are accustomed to living for the sake of modern realities, without looking back at the great past of Europe. The author sees the solution to the impending challenges of our time in the history of European states, their economic and social development. The author proposes to Europe - if it wants to survive in the 21st century as a civilization, it needs to return to historical values and traditions that shaped it since the Middle Ages, and moreover, sharply reduce Brussels’ tendency towards centralism. Wherein a close partnership should be maintained between European countries in key policy areas. The proposed preamble appears to be a unifying political program that can act as gathering point for politicians and citizens with different views.

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Looking Back at History of Madness

Foucault/Derrida Fifty Years Later ◽

10.7312/columbia/9780231171953.003.0002 ◽

2016 ◽

Author(s):

Lynne Huffer

Keyword(s):

Twentieth Century ◽

Critical Race Theory ◽

Critical Race ◽

Race Theory ◽

French Philosophy ◽

History Of ◽

Anglophone World ◽

Looking Back

This essay offers an overview of History of Madness, including its place in Foucault's oeuvre, its publication and translation history. Huffer focuses especially on the significance of History of Madness as an under-read text whose philosophical and historical implications have not yet been adequately explored. She argues that a careful reading of History of Madness on its own terms offers resources for moving beyond some of the impasses that characterize not only twentieth-century French philosophy, but also many of the fields in the Anglophone world—especially feminist, queer, and critical race theory—that arose in the wake of a debate about madness.

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Frequency Response Stabilization and Comparative Studies of MET Hydrophone at Marine Seismic Exploration Systems

Sensors ◽

10.3390/s20071944 ◽

2020 ◽

Vol 20 (7) ◽

pp. 1944 ◽

Cited By ~ 3

Author(s):

Egor Egorov ◽

Anna Shabalina ◽

Dmitry Zaitsev ◽

Sergey Kurkov ◽

Nikolay Gueorguiev

Keyword(s):

Frequency Response ◽

Field Tests ◽

High Sensitivity ◽

Seismic Exploration ◽

Joint Stock Company ◽

Experimental Sample ◽

Frequency Range ◽

Stock Company ◽

Low Frequencies ◽

Marine Seismic

Low frequency hydrophone with a frequency range of 1−300 Hz for marine seismic exploration systems has been developed. The operation principle of the hydrophone bases on the molecular electronic transfer that allows high sensitivity and low level self-noise at low frequencies (<10 Hz) to be achieved. The paper presents a stabilization method of the frequency response within the frequency range at a depth up to 30 m. Laboratory and marine tests confirmed the stated characteristics as well as the possibility of using this sensor in bottom marine seismic systems. An experimental sample of the hydrophone successfully passed a comparative marine test at Gelendzhik Bay (Black Sea) with the technical support of Joint-Stock Company (JSC) “Yuzhmorgeologiya”. One of the main results is the possibility of obtaining high-quality information in the field of low frequencies, which was demonstrated in the course of field tests.

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Full reciprocity-gap waveform inversion enabling sparse-source acquisition

Geophysics ◽

10.1190/geo2019-0527.1 ◽

2020 ◽

Vol 85 (6) ◽

pp. R461-R476 ◽

Cited By ~ 1

Author(s):

Florian Faucher ◽

Giovanni Alessandrini ◽

Hélène Barucq ◽

Maarten V. de Hoop ◽

Romina Gaburro ◽

...

Keyword(s):

Least Squares ◽

Waveform Inversion ◽

Point Sources ◽

Seismic Exploration ◽

Multiple Point ◽

Normal Velocity ◽

Reconstruction Procedure ◽

Dual Sensor ◽

Marine Seismic ◽

Propagation Of Waves

The quantitative reconstruction of subsurface earth properties from the propagation of waves follows an iterative minimization of a misfit functional. In marine seismic exploration, the observed data usually consist of measurements of the pressure field, but dual-sensor devices also provide the normal velocity. Consequently, a reciprocity-based misfit functional is specifically designed, and it defines the full reciprocity-gap waveform inversion (FRgWI) method. This misfit functional provides additional features compared to the more traditional least-squares approaches, in particular, in that the observational and computational acquisitions can be different. Therefore, the positions and wavelets of the sources from which the measurements are acquired are not needed in the reconstruction procedure and, in fact, the numerical acquisition (for the simulations) can be chosen arbitrarily. Based on 3D experiments, FRgWI is shown to behave better than full-waveform inversion in the same context. It allows for arbitrary numerical acquisitions in two ways: when few measurements are given, a dense numerical acquisition (compared to the observational one) can be used to compensate. However, with a dense observational acquisition, a sparse computational one is shown to be sufficient, for instance, with multiple-point sources, hence reducing the numerical cost. FRgWI displays accurate reconstructions in both situations and appears more robust with respect to crosstalk than least-squares shot stacking.

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A Critical Period in American Catholicism

The Review of Politics ◽

10.1017/s0034670500033301 ◽

1973 ◽

Vol 35 (4) ◽

pp. 523-536 ◽

Cited By ~ 1

Author(s):

Jay P. Dolan

Keyword(s):

Cultural Change ◽

Critical Period ◽

American Catholicism ◽

Madison Avenue ◽

The Past ◽

Age Of Discovery ◽

History Of ◽

The City ◽

Looking Back ◽

Area Of Study

Historians are fond of looking back over the panorama of the past and writing about periods of cultural change that altered the continuity of history. The age of discovery and the rise of the city are phrases that describe such pivotal epochs. These are not Madison Avenue-inspired book titles, but legitimate interpretative descriptions of past ages that provide a key to understanding the development of American civilization. Although the history of American Catholicism does not lend itself to such epochal descriptions, interpretative concepts are applicable in this area of study as well and they can provide useful keys to the analysis of the past.

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AUSTRALIA—SOVEREIGN RISK AND THE PETROLEUM INDUSTRY

The APPEA Journal ◽

10.1071/aj04017 ◽

2005 ◽

Vol 45 (1) ◽

pp. 191

Author(s):

D. Young ◽

R. Brockett ◽

J. Smart

Keyword(s):

National Parks ◽

Petroleum Industry ◽

Country Risk ◽

Seismic Exploration ◽

Sovereign Risk ◽

High Court ◽

Native Title ◽

Risk Rating ◽

The Usa ◽

History Of

Australia has rejoiced in its reputation for having low sovereign risk and corresponding rating, for decades. This reputation was bruised in the first decade after the High Court introduced Native Title into Australian law by the legislative response of the then Government, but has since recovered, and enjoys the world’s lowest country risk rating, and shares the worlds best sovereign risk rating with the USA. A number of government precipitated occurrences in recent times, however, raise the question: for how long can this continue?This paper tracks the long history of occasional broken resource commitments—for both petroleum and mining interests—by governments at both State and Federal level, and the policies which have driven these breaches. It also discusses the notorious recent cancellation of a resource lease by the Queensland Government, first by purporting to cancel the bauxite lease and, after legal action had commenced, by a special Act of Parliament to repeal a State Agreement Act. This has raised concerns in boardrooms around the world of the security of assets held in Australia on a retention, or care and maintenance basis.The paper also looks at the cancellation of the offshore prospecting rights held by WMC, with no compensation. This was a result of the concept that rights extinguished by the Commonwealth, with no gain to the Commonwealth or any other party do not constitute an acquisition of property, thereby denying access to the constitutional guarantee of ’just terms’ supposedly enshrined in the Australian Constitution where an acquisition has occurred.Some other examples are the prohibition on exploration in Queensland national parks last November. This cost some companies with existing tenures a lot of money as exploration permits were granted, but then permission to do seismic exploration refused (Victoria). Several losses of rights occurred as a result of the new Queensland Petroleum and Other Acts Amendment Act after investments have been made.Changes in fiscal policy can also impact on project viability, and some instances of this are considered.This paper also explores ways these risks can be minimised, and how and when compensation might be recovered.

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