scholarly journals ON A RECENT PRELIMINARY STUDY FOR THE MEASUREMENT OF THE LENSE–THIRRING EFFECT WITH THE GALILEO SATELLITES

2014 ◽  
Vol 23 (04) ◽  
pp. 1450028 ◽  
Author(s):  
L. IORIO
Keyword(s):  
Semimajor Axis ◽  
Ocean Tides ◽  
Linear Combinations ◽  
Long Period ◽  
The Past ◽  
Zonal Harmonics ◽  
The Future ◽  
Tidal Perturbations ◽  
Preliminary Study ◽  
Over Time

It has recently been proposed to combine the node drifts of the future constellation of 27 Galileo spacecraft together with those of the existing Laser Geodynamics Satellites (LAGEOS)-type satellites to improve the accuracy of the past and ongoing tests of the Lense–Thirring (LT) effect by removing the bias of a larger number of even zonal harmonics Jℓ than either done or planned so far. Actually, it seems a difficult goal to be achieved realistically for a number of reasons. First, the LT range signature of a Galileo-type satellite is as small as 0.5 mm over three-days arcs, corresponding to a node rate of just [Formula: see text] milliarcseconds per year (mas yr-1). Some tesseral and sectorial ocean tides such as K1 and K2 induce long-period harmonic node perturbations with frequencies which are integer multiples of the extremely slow Galileo's node rate [Formula: see text] completing a full cycle in about 40 yr. Thus, over time spans, T, of some years, they would act as superimposed semisecular aliasing trends. Since the coefficients of the Jℓ-free multisatellite linear combinations are determined only by the semimajor axis a, the eccentricity e and the inclination I, which are nominally equal for all the Galileo satellites, it is not possible to include all of them. Even using only one Galileo spacecraft together with the LAGEOS family would be unfeasible because of the fact that the resulting Galileo coefficient would be ≳ 1, thus enhancing the aliasing impact of the uncancelled nonconservative and tidal perturbations.

The Historyless Heathen and the Stagnating Pagan: History as Non-Native Category?

2018 ◽  
Vol 28 (1) ◽  
pp. 52-91 ◽  
Author(s):  
Kathryn Gin Lum
Keyword(s):  
Nineteenth Century ◽  
Core Component ◽  
Change Over Time ◽  
The Past ◽  
The Future ◽  
Religious Perspectives ◽  
Over Time

AbstractThis article asks whether and how J. Z. Smith's contention that religion is a “non-native category” might be applied to the discipline of history. It looks at how nineteenth-century Americans constructed their own understandings of “proper history”—authenticatable, didactic, and progressive—against the supposed historylessness of “heathen” Hawaiians and stagnation of “pagan” Chinese. “True” history, for these nineteenth-century historians, changed in the past and pointed to change in the future. The article asks historians to think about how they might be replicating some of the same assumptions about forward-moving history by focusing on change over time as a core component of historical narration. It urges historians to instead also incorporate the native historical imaginations of our subjects into our own methods, paying attention to when those imaginations are cyclical and reiterative as well as directional, and letting our subjects' assumptions about time and history, often shaped by religious perspectives, orient our own decisions about how to structure the stories we tell.

scholarly journals Anti-Memorials and the Art of Forgetting: Critical Reflections on a Memorial Design Practice

2008 ◽  
Vol 15 ◽  
Author(s):  
SueAnne Ware
Keyword(s):  
Human Activity ◽  
The Other ◽  
Complex Spectrum ◽  
Design Practice ◽  
Design Work ◽  
The Past ◽  
Heroin Overdose ◽  
The Future ◽  
Changes Over Time ◽  
Over Time

Andreas Huyssen writes, ‘Remembrance as a vital human activity shapes our links to the past, and the ways we remember define us in the present. As individuals and societies, we need the past to construct and to anchor our identities and to nurture a vision of the future.’ Memory is continually affected by a complex spectrum of states such as forgetting, denial, repression, trauma, recounting and reconsidering, stimulated by equally complex changes in context and changes over time. The apprehension and reflective comprehension of landscape is similarly beset by such complexities. Just as the nature and qualities of memory comprise inherently fading, shifting and fleeting impressions of things which are themselves ever-changing, an understanding of a landscape, as well as the landscape itself, is a constantly evolving, emerging response to both immense and intimate influences. There is an incongruity between the inherent changeability of both landscapes and memories, and the conventional, formal strategies of commemoration that typify the constructed landscape memorial. The design work presented in this paper brings together such explorations of memory and landscape by examining the ‘memorial’. This article examines two projects. One concerns the fate of illegal refugees travelling to Australia: The SIEVX Memorial Project. The other, An Anti-Memorial to Heroin Overdose Victims, was designed by the author as part of the 2001 Melbourne Festival.

Legitimacy

2020 ◽  
pp. 87-105
Author(s):  
George E. Mitchell ◽  
Hans Peter Schmitz ◽  
Tosca Bruno-van Vijfeijken
Keyword(s):  
Stakeholder Expectations ◽  
The Past ◽  
New Approaches ◽  
Wide Range ◽  
The Future ◽  
Governance Transparency ◽  
Over Time

Chapter 5 explores how the foundations for TNGO legitimacy have changed over time, creating imperatives for TNGOs to invest in new capabilities and adopt new practices. In the past, TNGOs derived legitimacy from their espoused principles, representational claims, elite expertise, demonstrated financial stewardship, commitment to charity, and patterns of conformity. More recently, TNGOs themselves have helped to bring about a shift toward new bases for legitimacy that focus on effectiveness, strategy, leadership, governance, transparency, and responsiveness. However, transitioning to the legitimacy practices of the future is complicated by the persistence of an antiquated architecture that still demands that TNGO conform to legacy expectations. Nevertheless, new approaches to enhancing legitimacy provide a wide range of opportunities that invite organizations to proactively align their aspirations with emerging stakeholder expectations.

scholarly journals How predictable is extinction? Forecasting species survival at million-year timescales

2019 ◽  
Vol 374 (1788) ◽  
pp. 20190392 ◽  
Author(s):  
Peter Smits ◽  
Seth Finnegan
Keyword(s):  
Fossil Record ◽  
Human Impacts ◽  
Rank Order ◽  
Extinction Risk ◽  
Geographical Range ◽  
The Past ◽  
The Future ◽  
Out Of Sample ◽  
Extinction Events ◽  
Over Time

A tenet of conservation palaeobiology is that knowledge of past extinction patterns can help us to better predict future extinctions. Although the future is unobservable, we can test the strength of this proposition by asking how well models conditioned on past observations would have predicted subsequent extinction events at different points in the geological past. To answer this question, we analyse the well-sampled fossil record of Cenozoic planktonic microfossil taxa (Foramanifera, Radiolaria, diatoms and calcareous nanoplankton). We examine how extinction probability varies over time as a function of species age, time of observation, current geographical range, change in geographical range, climate state and change in climate state. Our models have a 70–80% probability of correctly forecasting the rank order of extinction risk for a random out-of-sample species pair, implying that determinants of extinction risk have varied only modestly through time. We find that models which include either historical covariates or account for variation in covariate effects over time yield equivalent forecasts, but a model including both is overfit and yields biased forecasts. An important caveat is that human impacts may substantially disrupt range-risk dynamics so that the future will be less predictable than it has been in the past. This article is part of a discussion meeting issue ‘The past is a foreign country: how much can the fossil record actually inform conservation?’

scholarly journals Cell and animal models of mtDNA biology: progress and prospects

2007 ◽  
Vol 292 (2) ◽  
pp. C658-C669 ◽  
Author(s):  
Shaharyar M. Khan ◽  
Rafal M. Smigrodzki ◽  
Russell H. Swerdlow
Keyword(s):  
Gene Therapy ◽  
Animal Models ◽  
Human Disease ◽  
Mitochondrial Genetics ◽  
Mtdna Mutation ◽  
Mtdna Mutations ◽  
The Past ◽  
The Future ◽  
Basic Biology ◽  
Over Time

The past two decades have witnessed an evolving understanding of the mitochondrial genome’s (mtDNA) role in basic biology and disease. From the recognition that mutations in mtDNA can be responsible for human disease to recent efforts showing that mtDNA mutations accumulate over time and may be responsible for some phenotypes of aging, the field of mitochondrial genetics has greatly benefited from the creation of cell and animal models of mtDNA mutation. In this review, we critically discuss the past two decades of efforts and insights gained from cell and animal models of mtDNA mutation. We attempt to reconcile the varied and at times contradictory findings by highlighting the various methodologies employed and using human mtDNA disease as a guide to better understanding of cell and animal mtDNA models. We end with a discussion of scientific and therapeutic challenges and prospects for the future of mtDNA transfection and gene therapy.

scholarly journals The Past, Present and Future of Nordic Courts

2021 ◽  
pp. 291-308
Author(s):  
Anna Nylund
Keyword(s):  
Dispute Resolution ◽  
The State ◽  
Legal Language ◽  
The Past ◽  
Current Trends ◽  
The Future ◽  
Resolution Processes ◽  
Over Time

AbstractBased on the insights from the previous chapters in this volume, this concluding chapter discusses key traits of Nordic courts: colloquial legal language, generalist judges, ‘unrefined’ and fragmentary laws, high trust in the state and judges, and corporatism. The development of these traits over time is explored as well as the emergence of new traits that could be labelled ‘Nordic’. It also discusses how two current trends—Europeanisation and privatisation of dispute resolution processes—influence Nordic courts. The question whether a unified Nordic procedural culture still exists is raised. Finally, the future of Nordic courts is discussed.

scholarly journals The longest homogeneous series of grape harvest dates, Beaune 1354–2018, and its significance for the understanding of past and present climate

2019 ◽  
Author(s):  
Thomas Labbé ◽  
Christian Pfister ◽  
Stefan Brönnimann ◽  
Daniel Rousseau ◽  
Jörg Franke ◽  
...  
Keyword(s):  
Global Warming ◽  
Temperature Series ◽  
Present Climate ◽  
Central European ◽  
Phenological Data ◽  
Long Period ◽  
The Past ◽  
Harvest Dates ◽  
July Temperature ◽  
Over Time

Abstract. Records of grape harvest dates (GHD) are the oldest and the longest continuous phenological data in Europe. However, many available series including the well-known (Dijon) Burgundy series are error prone, because scholars so far uncritically drew the data from nineteenth century publications instead of going back to the archives. The GHD from the famous vine region of Beaune (Burgundy) were entirely drawn from the archives, critically cross checked with narrative evidence and calibrated with the long Paris temperature series comprising the 360 years from 1659 to 2018. The 664-year-long Beaune series from 1354 to 2018 is also significantly correlated with tree-ring and documentary proxy evidence as well as with the Central European temperature series (from 1500). The series is clearly subdivided into two parts. From 1354 to 1987 grapes were on average picked from 28 September on, whereby during the last 31 year long period of rapid Global Warming from 1988 to 2018 harvests began 13 days earlier. In the Paris temperature measurements since 1659, April-to-July temperature reached the highest value ever in 2018. The 33 extremely warm events comprising the 5 % percentile bracket of GHD are unevenly distributed over time. 21 of them occurred between 1393 and 1719, whereby this is the case for just five years between 1720 and 2002. Since the hot summer 2003 8 out of 16 spring-summer periods were outstanding according the statistic of the last 664 years, no less than 5 among them within the last 8 years. In sum, the 664-year-long Beaune GHD series demonstrates that outstanding hot and dry years in the past were outliers, whereby they became the norm since the transition to rapid Global Warming in 1988.

The Politics of Commemoration among Palestinians

2017 ◽  
Vol 47 (1) ◽  
pp. 69-85 ◽  
Author(s):  
Rochelle Davis
Keyword(s):  
Collective Actions ◽  
National Discourse ◽  
Change Over Time ◽  
The Past ◽  
The Future ◽  
Over Time

Thinking about events and dates that Palestinians commemorate, one hundred years after the fateful Balfour Declaration of 1917, reveals a political timeline on which the story of contemporary Palestinian history hangs. Commemoration, as an act, tends to lionize certain events and persons, especially when it is officially created or sponsored. Because Palestinians have long been without an official political entity in Palestine that can produce official commemorative actions, Palestinian commemorations reflect both individual and collective actions that develop and change over time. This essay analyzes those actions and the different spaces and actors behind them to explicate the politics of commemoration. It posits that the metanarratives of Palestinian history that have developed give primacy to the powers and forces that undermined Palestinian aspirations and actions. As metanarratives, they create frames for understanding history within a political and national discourse of struggle, dispossession, and suffering. And yet, these metanarratives miss the embodied practices of commemoration that define Palestinian life within this struggle. Detailing Palestinians' commemorations reveals the robust culture that ties commemorations of the past with activism, awareness, and education for the present and the future.

Lies, Sex, and Suicide: Teaching Fundamental Accounting Concepts with Sordid Tales from the Seamier Side of Accounting History

2019 ◽  
Vol 46 (2) ◽  
pp. 79-85 ◽  
Author(s):  
Frank Badua
Keyword(s):  
Theory And Practice ◽  
Accounting History ◽  
The Past ◽  
The Future ◽  
Accounting Theory ◽  
Insight Into ◽  
Over Time

The Academy of Accounting Historians has as its motto the Latin proverb praetera illuminet postera, the past illuminates the future. It is an apt motto in many ways. Certainly, many thoughtful accounting academics and professionals will consider how accounting theory and practice have evolved over time, and thereby gain a deeper insight into how both professional and scholarly endeavors should be conducted. But this AHJ Salmagundi article suggests another way by which the past can illuminate the future. Accounting history provides concrete examples of fundamental accounting concepts. And, because many of these examples are found in scandalous, shocking, and sordid events, the lessons could be more compellingly and vividly illustrated to the audience, by the operation of the rhetorical phenomena collectively known as the Aristotelean Triad.

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