scholarly journals Understanding and improving the timing of PSR J0737−3039B

2020 ◽  
Vol 643 ◽  
pp. A143
Author(s):  
A. Noutsos ◽  
G. Desvignes ◽  
M. Kramer ◽  
N. Wex ◽  
P. C. C. Freire ◽  
...  
Keyword(s):  
Beam Shape ◽  
Tests Of General Relativity ◽  
Geodetic Precession ◽  
Timing Model ◽  
Simple Geometry ◽  
Profile Changes ◽  
Theories Of Gravity ◽  
The Impact ◽  
First Time

The double pulsar (PSR J0737−3039A/B) provides some of the most stringent tests of general relativity (GR) and its alternatives. The success of this system in tests of GR is largely due to the high-precision, long-term timing of its recycled-pulsar member, pulsar A. On the other hand, pulsar B is a young pulsar that exhibits significant short-term and long-term timing variations due to the electromagnetic-wind interaction with its companion and geodetic precession. Improving pulsar B’s timing precision is a key step towards improving the precision in a number of GR tests with PSR J0737−3039A/B. In this paper, red noise signatures in the timing of pulsar B are investigated using roughly a four-year time span, from 2004 to 2008, beyond which time the pulsar’s radio beam precessed out of view. In particular, we discuss the profile variations seen on timescales ranging from minutes – during the so-called “bright” orbital phases – to hours – during its full 2.5 h orbit – to years, as geodetic precession displaces the pulsar’s beam with respect to our line of sight. Also, we present our efforts to model the orbit-wide, harmonic modulation that has been previously seen in the timing residuals of pulsar B, using simple geometry and the impact of a radial electromagnetic wind originating from pulsar A. Our model successfully accounts for the long-term precessional changes in the amplitude of the timing residuals but does not attempt to describe the fast profile changes observed during each of the bright phases, nor is it able to reproduce the lack of observable emission between phases. Using a nested sampling analysis, our simple analytical model allowed us to extract information about the general properties of pulsar B’s emission beam, such as its approximate shape and intensity, as well as the magnitude of the deflection of that beam, caused by pulsar A’s wind. We also determined for the first time that the most likely sense of rotation of pulsar B, consistent with our model, is prograde with respect to its orbital motion. Finally, we discuss the potential of combining our model with future timing of pulsar B, when it becomes visible again, towards improving the precision of tests of GR with the double pulsar. The timing of pulsar B presented in this paper depends on the size of the pulsar’s orbit, which was calculated from GR, in order to precisely account for orbital timing delays. Consequently, our timing cannot directly be used to test theories of gravity. However, our modelling of the beam shape and radial wind of pulsar B can indirectly aid future efforts to time this pulsar by constraining part of the additional red noise observed on top of the orbital delays. As such, we conclude that, in the idealised case of zero covariance between our model’s parameters and those of the timing model, our model can bring about a factor 2.6 improvement on the measurement precision of the mass ratio, R = mA/mB, between the two pulsars: a theory-independent parameter, which is pivotal in tests of GR.

The decline and rise of class voting? From occupation to culture in Australia

2018 ◽  
Vol 55 (3) ◽  
pp. 426-445 ◽  
Author(s):  
Ian McAllister ◽  
Toni Makkai
Keyword(s):  
Cultural Capital ◽  
National Survey ◽  
Social And Cultural Capital ◽  
Class Voting ◽  
Party Support ◽  
The 1960S ◽  
Economic Assets ◽  
The Impact ◽  
First Time

Conventional wisdom has long held that class is declining as an influence on voting. More recently, new conceptions of class, focusing on the ownership of economic assets and the possession of social and cultural capital, have challenged this view. This article evaluates these arguments in two ways. First, we examine trends in the impact of traditional measures of class on the vote in Australia from the 1960s to the present day. Second, using a 2015 national survey that measures different aspects of class voting, we assess for the first time the relative effects on the vote of occupation, assets, and social and cultural capital. The results show that while occupation has declined and is now unimportant, the ownership of both assets and cultural capital are major influences on the vote. We argue that the impact of class on the vote has not declined, but rather transformed itself in new and different ways, which has important long-term implications for party support.

scholarly journals An Introduction to Nicos Hadjinicolaou's “Art Centers and Peripheral Art” (1982)

ARTMargins ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 112-118
Author(s):  
Terry Smith
Keyword(s):  
The United States ◽  
Political Art ◽  
Book Art ◽  
Hard Edge ◽  
War Of Independence ◽  
History Of ◽  
The 1960S ◽  
The Impact ◽  
First Time

Change in the history of art has many causes, but one often overlooked by art historical institutions is the complex, unequal set of relationships that subsist between art centers and peripheries. These take many forms, from powerful penetration of peripheral art by the subjects, styles and modes of the relevant center, through accommodation to this penetration to various degrees and kinds of resistance to it. Mapping these relationships should be a major task for art historians, especially those committed to tracing the reception of works of art and the dissemination of ideas about art. This lecture, delivered by Nicos Hadjinicolaou in 1982, outlines a “political art geography” approach to these challenges, and demonstrates it by exploring four settings: the commissioning of paintings commemorating key battles during the Greek War of Independence; the changes in Diego Rivera's style on his return to Mexico from Paris in the 1920s; the impact on certain Mexican artists in the 1960s of “hard edge” painting from the United States; and the differences between Socialist Realism in Moscow and in the Soviet Republics of Asia during the mid-twentieth century. The lecture is here translated into English for the first time and is introduced by Terry Smith, who relates it to its author's long-term art historical quest, as previously pursued in his book Art History and Class Struggle (1973).

scholarly journals Latent Antigen Vaccination in a Model Gammaherpesvirus Infection

2001 ◽  
Vol 75 (17) ◽  
pp. 8283-8288 ◽  
Author(s):  
Edward J. Usherwood ◽  
Kimberley A. Ward ◽  
Marcia A. Blackman ◽  
James P. Stewart ◽  
David L. Woodland
Keyword(s):  
Latent Infection ◽  
Model Systems ◽  
Murine Gammaherpesvirus ◽  
Latently Infected ◽  
Associated Proteins ◽  
Infected Cells ◽  
The Impact ◽  
First Time

ABSTRACT Vaccines that can reduce the load of latent gammaherpesvirus infections are eagerly sought. One attractive strategy is vaccination against latency-associated proteins, which may increase the efficiency with which T cells recognize and eliminate latently infected cells. However, due to the lack of tractable animal model systems, the effect of latent-antigen vaccination on gammaherpesvirus latency is not known. Here we use the murine gammaherpesvirus model to investigate the impact of vaccination with the latency-associated M2 antigen. As expected, vaccination had no effect on the acute lung infection. However, there was a significant reduction in the load of latently infected cells in the initial stages of the latent infection, when M2 is expressed. These data show for the first time that latent-antigen vaccination can reduce the level of latency in vivo and suggest that vaccination strategies involving other latent antigens may ultimately be successfully used to reduce the long-term latent infection.

scholarly journals The Grain Market between the Reigns of Alexey Mikhailovich and Catherine the Great: Was there a ‘Price Revolution’?

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Arthur Mustafin
Keyword(s):  
Eighteenth Century ◽  
Supply And Demand ◽  
Wide Range ◽  
Grain Market ◽  
The Impact ◽  
First Time ◽  
The Relationship ◽  
Regions Of Russia ◽  
Grain Prices

The author of this article attempts to reveal and systematise archival data on grain prices in Russia between the 1650s and 1700s and analyse their dynamics by comparing them with data for the eighteenth century. The study is based on a wide range of archival sources from the funds of the RSAAA (RGADA), CSA of Moscow (TsGA of Moscow), DM NLR (OR RNB), and SFI CANNR (GKU TsANO). The data from these sources make it possible to construct time series describing rye and oat price dynamics in the northern and central non-black earth regions of Russia. The author substantiates the homogeneity and reliability of the data received and determines the real prices. The resulting numbers make the author doubt the “price revolution” in eighteenth-century Russia. Throughout the eighteenth century, the average real prices remained below the level of the 1660s and 1670s. Only in the 1790s did prices briefly exceed this level. Overall, the Russian grain market was characterised by long-term price fluctuations. The author aims to explain this dynamic by analysing supply and demand in the grain market. More particularly, for the first time in the historiography, the author examines the connection between Russian grain prices and yield in the second half of the seventeenth and eighteenth centuries. It is established that in most cases, the relationship between these indicators was direct: as grain yield increased, prices did too. The article explains this seeming paradox. The data published by the author help not only to estimate the impact of various factors on grain prices during the period in question, but also solve practical tasks regarding various price indicators in grain equivalents.

Do frequent acquirers outperform in cross-border acquisitions? A study of Indian companies

2020 ◽  
Vol 30 (4) ◽  
pp. 491-514
Author(s):  
Samta Jain ◽  
Smita Kashiramka ◽  
P.K. Jain
Keyword(s):  
Operating Performance ◽  
Financial Statements ◽  
Acquisition Performance ◽  
Content Type ◽  
Acquisition Period ◽  
Cross Border ◽  
Acquiring Firms ◽  
The Impact ◽  
First Time

Purpose The purpose of this paper is to examine the impact of cross-border acquisitions (CBAs) on the financial and operating performance of acquiring firms from emerging economies in the long-term; the acquiring firms have been segregated into frequent (multiple) and first-time (single) acquirers based on their prior cross-border experience. The intent is to identify if overseas activities bring over and above advantage to multiple acquirers in terms of enhanced financial synergies and reduced costs, motivating them to engage in sequential international transactions. Design/methodology/approach The paper analyses the impact of CBAs announced and completed during 2004–2013 by Indian companies listed on the NIFTY 500 index. The post-acquisition financial and operating performance of Indian cross-border acquirers has been compared with their pre-acquisition performance. The average performance over three-years immediately preceding the acquisition year constitutes the benchmark for the post-acquisition performance. The post-acquisition period includes a year of integration followed by three successive post-integration years. Therefore, in operational terms, the research period extends from 2001–2017. The long-term performance of frequent (multiple) and first-time (single) Indian acquirers has been investigated comprehensively using a set of 16 financial ratios. The performance has been assessed using the secondary data collected from financial statements of acquiring companies; the financial statements and the list of CBAs by Indian companies have been obtained from Thomson Reuter’s EIKON database. Findings The financial and operating performance of frequent as well as first-time acquirers have depicted a similarly deteriorating trend during the post-acquisition period. These findings indicate that the international expansion of Indian companies is not guided by synergy creation potential and may be pushed by the overconfidence or over-optimism and agency conflicts of managers. This, perhaps, indicates that firms are being imprudent in investing free cash flows available with them. Originality/value The study is the first of its kind. No study, to the best of the authors’ knowledge, has analysed the performance of acquiring firms by segregating them into frequent and first-time acquirers using accounting measures of performance. More so, an extensive analysis of the long-term financial and operating performance of acquiring companies is rare to come across in the extant literature.

Mindful Self-Care for Earlier Schooling

2021 ◽  
pp. 21-41
Author(s):  
Jacquelynne Anne Boivin ◽  
Theresa Melito-Conners
Keyword(s):  
Early Childhood ◽  
Self Care ◽  
Public Schooling ◽  
Review Of The Literature ◽  
Emotional Competencies ◽  
Mindfulness Practices ◽  
Care Practices ◽  
The Impact ◽  
First Time

This chapter explores the role that mindful self-care practices play in helping students transition into attending school for the first time. Self-care practices are described in this chapter based on a thorough review of the literature focusing on the benefits for young students in early childhood educational settings. A thorough review of the literature has provided insight into five areas that address the following topics: (1) defining the concept of mindful self-care, (2) the impact of mindfulness practices on self-care, (3) the significance of modeling in learning to be self-cared, (4) benefits of self-care in the early childhood transitionary period, (5) long-term benefits of implementing self-care skills as socio-emotional competencies in early childhood, (6) implications for earlier public schooling, (7) educating starting at birth.

Oliver E. Williamson,

2016 ◽  
Author(s):  
Andrew B. Whitford
Keyword(s):  
Transaction Cost ◽  
Critical Analysis ◽  
Institutional Economics ◽  
Transaction Cost Economics ◽  
Antitrust Policy ◽  
New Institutional Economics ◽  
Policy Analysts ◽  
The Impact ◽  
First Time

This chapter comments on Oliver Williamson’s 1975 book,Markets and Hierarchies: Analysis and Antitrust Implications, a critical analysis of how firms operate in markets. Williamson describes a new way of understanding markets and hierarchies by using the term “New Institutional Economics” for the first time. This chapter examines Williamson’s approach and the impact of his book, first by discussing his arguments about markets and hierarchies in relation to what policy analysts sometimes call “the politics of ideas”. It then considers Williamson’s particular interest in antitrust policy as well as his thesis about transaction cost economics. Finally, it evaluates the implications of Williamson’s research for the long-term development of a politics of ideas about firms in markets.

scholarly journals SPORT

Neurosurgery ◽  
2011 ◽  
Vol 76 (suppl_1) ◽  
pp. S57-S63 ◽  
Author(s):  
Atman Desai ◽  
Perry A. Ball ◽  
Kimon Bekelis ◽  
Jon Lurie ◽  
Sohail K. Mirza ◽  
...  
Keyword(s):  
Spinal Stenosis ◽  
Short Form ◽  
Bodily Pain ◽  
Long Term Outcomes ◽  
Nerve Root Injury ◽  
Lumbar Spinal ◽  
Incidental Durotomy ◽  
The Impact ◽  
First Time

Abstract BACKGROUND: Incidental durotomy is a familiar encounter during surgery for lumbar spinal stenosis. The impact of durotomy on long-term outcomes remains a matter of debate. OBJECTIVE: To determine the impact of durotomy on the long-term outcomes of patients in the Spine Patient Outcomes Research Trial (SPORT). METHODS: The SPORT cohort participants with a confirmed diagnosis of spinal stenosis, without associated spondylolisthesis, undergoing standard, first-time, open decompressive laminectomy, with or without fusion, were followed up from baseline at 6 weeks, and 3, 6, and 12 months and yearly thereafter at 13 spine clinics in 11 US states. Patient data from this prospectively gathered database were reviewed. As of May 2009, the mean follow-up among all analyzed patients was 43.8 months. RESULTS: Four hundred nine patients underwent first-time open laminectomy with or without fusion. Thirty-seven of these patients (9%) had an incidental durotomy. No significant differences were observed with or without durotomy in age; sex; race; body mass index; the prevalence of smoking, diabetes mellitus, and hypertension; decompression level; number of levels decompressed; or whether an additional fusion was performed. The durotomy group had significantly increased operative duration, operative blood loss, and inpatient stay. There were, however, no differences in incidence of nerve root injury, mortality, additional surgeries, or primary outcomes (Short Form-36 Bodily Pain or Physical Function scores or Oswestry Disability Index) at yearly follow-ups to 4 years. CONCLUSIONS: Incidental durotomy during first-time lumbar laminectomy for spinal stenosis did not impact long-term outcomes in affected patients.

scholarly journals Triage: line or nets? Early intervention and the youth justice system

2014 ◽  
Vol 13 (4) ◽  
pp. 147-160 ◽  
Author(s):  
Sarah Soppitt ◽  
Adele Irving
Keyword(s):  
Restorative Justice ◽  
Justice System ◽  
Design Methodology ◽  
Qualitative Data ◽  
Youth Justice ◽  
Content Type ◽  
The Impact ◽  
First Time

Purpose – The purpose of this paper is to present a discussion of the value of early diversion schemes, underpinned by the principles of restorative justice (RJ), for First Time Entrants (FTEs) into the criminal justice system (CJS). Design/methodology/approach – The paper focuses specifically on the findings of a 12-month study into the introduction of “Triage” by one Youth Offending Team (YOT) in the northeast of England. Findings – Re-offending data suggested that Triage is more effective in reducing re-offending than conventional justice practices, due to the restorative nature of the scheme. However, the qualitative data raised a number of issues, particularly relating to problems of “net-widening” and the impact of recording processes on young people's desistance, as well as the role of victim engagement in the process. These issues could undermine the long-term effectiveness of Triage and its successful application within other youth justice contexts. Originality/value – The paper aims to contribute further understanding regarding the impacts of RJ practices on reducing re-offending compared to traditional processes, and in particular, consider the role of implementation issues in the production of outcomes and impacts.

Revisiting the nexus between financial development, FDI, and growth: New evidence from second generation econometric procedures in the Turkish context

2014 ◽  
Vol 64 (1) ◽  
pp. 73-89 ◽  
Author(s):  
Hasan Güngör ◽  
Salih Katircioglu ◽  
Mehmet Mercan
Keyword(s):  
Financial Development ◽  
Structural Breaks ◽  
Second Generation ◽  
Real Income ◽  
Annual Data ◽  
Multiple Structural Breaks ◽  
Equilibrium Relationship ◽  
The Impact ◽  
First Time

This study investigates the impact of the selected financial development proxies and foreign direct investment (FDI) on the growth in the case of Turkey, using annual data for the 1960–2011 period. The second-generation econometric procedure has been applied for the first time to the Turkish data with this respect. Unit root tests by Carrion-i-Silvestre et al. (2009) assume that real income, financial development proxies, and FDI are non-stationary at levels, but become stationary at first differences through multiple structural breaks. Cointegration results by Maki (2012) confirm the existence of a long-term equilibrium relationship between real income growth, financial development, and FDI, again through multiple structural breaks. Finally, this paper confirms that financial development and FDI are long-term drivers of real income, which enable it to react to its long-term path significantly.

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