scholarly journals Radiocarbon and 11-Year Variations of Cosmic Rays

Radiocarbon ◽  
1993 ◽  
Vol 35 (3) ◽  
pp. 347-350 ◽  
Author(s):  
A. A. Burchuladze ◽  
S. V. Pagava ◽  
G. I. Togonidze ◽  
M. V. Avtandilashvili

B. P. Konstantinov and G. E. Kocharov (1965, 1967) addressed the complex problem of astrophysical phenomena and radiocarbon. Currently available data show that the determination of cosmogenic 14C in accurately dated samples of terrestrial and atmospheric origin is one of the most reliable and promising methods for studying cosmic-ray variations in the past. 14C dating samples of terrestrial origin has helped solve the problem of long-term (100 yr or more) 14C variations and, accordingly, of cosmic-ray variations in the past. Short-term (ca. 11 yr or less) variations are still under investigation (Alexeyev et al. 1971; Damon, Long and Wallick 1973).

1994 ◽  
Vol 47 (3) ◽  
pp. 323-331 ◽  
Author(s):  
Therese Matheisen ◽  
Ole Ørpen

Use of multi antenna GPS equipment for determination of a vessel's attitude holds some promise for the development of accurate and inexpensive attitude systems. An application for such systems might be to provide very accurate roll information for multibeam echo sounders.The present state-of-the-art GPS attitude systems cannot meet the required accuracy and update rate for such applications. GEOTEAM A/S has therefore developed a PC-based system which combines GPS-based attitude with roll and pitch information from a Vertical Reference Unit (VRU) and heading from a gyro compass.In such a combined system, the long-term high accuracy of a GPS-based attitude system is combined with the short-term accuracy and fast update rate of conventional VRUS and gyro compasses in order to achieve a resulting performance that is better than any of the systems. In effect, the GPS attitude is used to calibrate the VRU and the gyro compass in real time.During the past year extensive tests have been performed with a system using a Trimble VECTOR II GPS attitude system with a 1 metre baseline between the antennas, both on a van (with an inertial navigation system as reference) and on a vessel. During November and December 1993 further tests were made with an Ashtech 3DF attitude system with longer baselines (7·5 m). These tests were made on a vessel where the combined GPS/VRU attitude was fed into a multibeam echo sounder. These tests were performed in cooperation with Simrad Subsea A/S, the multibeam echo sounder EM 1000 manufacturer.


2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Dr. Kamlesh Kumar Shukla

FIIs are companies registered outside India. In the past four years there has been more than $41 trillion worth of FII funds invested in India. This has been one of the major reasons on the bull market witnessing unprecedented growth with the BSE Sensex rising 221% in absolute terms in this span. The present downfall of the market too is influenced as these FIIs are taking out some of their invested money. Though there is a lot of value in this market and fundamentally there is a lot of upside in it. For long-term value investors, there’s little because for worry but short term traders are adversely getting affected by the role of FIIs are playing at the present. Investors should not panic and should remain invested in sectors where underlying earnings growth has little to do with financial markets or global economy.


2021 ◽  
Author(s):  
Kseniia Golubenko ◽  
Eugene Rozanov ◽  
Genady Kovaltsov ◽  
Ari-Pekka Leppänen ◽  
Ilya Usoskin

<p>We present the first results of modelling of the short-living cosmogenic isotope <sup>7</sup>Be production, deposition, and transport using the chemistry-climate model SOCOLv<sub>3.0</sub> aimed to study solar-terrestrial interactions and climate changes. We implemented an interactive deposition scheme,  based on gas tracers with and without nudging to the known meteorological fields. Production of <sup>7</sup>Be was modelled using the 3D time-dependent Cosmic Ray induced Atmospheric Cascade (CRAC) model. The simulations were compared with the real concentrations (activity) and depositions measurements of <sup>7</sup>Be in the air and water at Finnish stations. We have successfully reproduced and estimated the variability of the cosmogenic isotope <sup>7</sup>Be produced by the galactic cosmic rays (GCR) on time scales longer than about a month, for the period of 2002–2008. The agreement between the modelled and measured data is very good (within 12%) providing a solid validation for the ability of the SOCOL CCM to reliably model production, transport, and deposition of cosmogenic isotopes, which is needed for precise studies of cosmic-ray variability in the past. </p>


Author(s):  
Neil F. Comins
Keyword(s):  

While Chapter 6 deals with short-term adjustments, there are also long term adjustments to traveling in space, including loss of bone and muscle mass, the need for different medicine regimens, adjusting to the environment and its cycles of sounds, vibrations, and lights. Learning to sleep in microgravity. Adjusting to the effects of cosmic rays, which cause flashes of light.


2021 ◽  
pp. 244-248
Author(s):  
Michael J. Rosenfeld

Gay rights and marriage equality have advanced so far in the U.S. in the past decade that it would be all too easy to assume that the struggle is over. The opponents of gay rights, however, remain powerful. Readers can take inspiration from how dramatically attitudes toward gay rights have liberalized in the past two decades and how transformative the liberalization of attitudes has been. We live in a world where political lies often seem to have the upper hand. It is worth remembering that despite the many short term advantages that lies can yield in politics, the truth has some long term advantages as well. The way the marriage equality movement prevailed should be a lesson to anyone who wants to make progressive social change.


1968 ◽  
Vol 1 (4) ◽  
pp. 154-157
Author(s):  
D. J. Cooke ◽  
A. G. Fenton

Primary cosmic rays passing through the solar system carry with them valuable information about solar and astrophysical phenomena in the form of intensity and spectral variations. In order that this information be efficiently extracted from observations of the directional cosmic-ray flux at the surface of the Earth, it is essential to have accurate information available to enable the relating of the observed secondary cosmic-ray directions of motion and intensity to those outside the range of the disturbing terrestrial influences.


2016 ◽  
Vol 13 (1) ◽  
Author(s):  
Dana P. Goldman ◽  
Darius N. Lakdawalla ◽  
James R. Baumgardner ◽  
Mark T. Linthicum

AbstractMedical innovation has generated significant gains in health over the past decades, but these advances have been accompanied by rapid growth in healthcare spending. Faced with a growing number of high-cost but high-impact innovations, some have argued to constrain prices for new therapies – especially through global caps on pharmaceutical spending and limits on prices for individual drugs. We show that applying this threshold to past innovations would have limited access to many highly valuable drugs such as statins and anti-retrovirals. We also argue that budget caps violate several important principles of health policy. First, budget caps treat healthcare spending as a consumption good, like going to a movie or buying a meal. However, healthcare spending should be viewed as an investment, whose benefits accrue over many years – much like spending on education. Second, budgetary cost is a poor indicator of value, thereby distorting coverage decisions. Third, affordability arguments often use a short-term horizon, thereby missing that long-term health is society’s ultimate goal. Fourth, assessments of benefit should incorporate not just the immediate clinical benefit to patients, but also long-term health improvements, cost savings, and increased productivity. Fifth, global budget caps arbitrarily anchor spending on the status quo, thereby setting too stringent a threshold for socially-desirable innovation. In sum, a solitary focus on short-term costs can be detrimental to population health in the long-run. When medical treatment decisions are properly viewed as investments, budget caps are not the answer; rather, we need to find mechanisms to encourage spending decisions based on long-term value. Only then can we generate health returns to societal investments, while also encouraging the new research and development necessary to extend the gains of recent decades.


Author(s):  
Paul D. Miller

Afghanistan has twice been thrust front and center of US national security concerns in the past half-century: first, during the Soviet-Afghan War, when Afghanistan served as a proxy for American efforts to combat Soviet influence; and second, as the frontline state and host for America’s global response to al-Qaida’s terrorist attacks of 2001. In both instances, American involvement swung from intensive investment and engagement to withdrawal and neglect. In both cases, American involvement reflected US concerns more than Afghan realities. And both episodes resulted in short-term successes for American security with long-term consequences for Afghanistan and its people. The signing of a strategic partnership agreement between the two countries in 2012 and a bilateral security agreement in 2013 created the possibility of a steadier and more forward-looking relationship—albeit one that the American and Afghan people may be less inclined to pursue as America’s longest war continues to grind on.


2020 ◽  
Vol 81 (6) ◽  
pp. 1099-1113 ◽  
Author(s):  
Yuan Zhang ◽  
Pingping Luo ◽  
Shuangfeng Zhao ◽  
Shuxin Kang ◽  
Pengbo Wang ◽  
...  

Abstract Accelerated eutrophication, which is harmful and difficult to repair, is one of the most obvious and pervasive water pollution problems in the world. In the past three decades, the management of eutrophication has undergone a transformation from simple directed algal killing, reducing endogenous nutrient concentration to multiple technologies for the restoration of lake ecosystems. This article describes the development and revolution of three remediation methods in application, namely physical, chemical, and biological methods, and it outlines their possible improvements and future directions. Physical and chemical methods have obvious and quick effects to purify water in the short term and are more suitable for small-scale lakes. However, these two methods cannot fundamentally solve the eutrophic water phenomenon due to costly and incomplete removal results. Without a sound treatment system, the chemical method easily produces secondary pollution and residues and is usually used for emergency situations. The biological method is cost-effective and sustainable, but needs a long-term period. A combination of these three management techniques can be used to synthesize short-term and long-term management strategies that control current cyanobacterial blooms and restore the ecosystem. In addition, the development and application of new technologies, such as big data and machine learning, are promising approaches.


1982 ◽  
Vol 15 (02) ◽  
pp. 180-186 ◽  
Author(s):  
Joseph LaPalombara

Political scientists are only now, and dimly, beginning to recognize that something called “political risk analysis” (PRA) is very much in vogue in the corporate and banking communities of this country. Any attempt to assess this uncommon development should begin with this question: Why would any banker or corporate manager wish to spend hard cash on anything political scientists might have to say about places overseas where banks and multinational corporations lend or invest their capital? After all, the profession is not exactly distinguished by its ability to make accurate forecasts. Indeed, Sartori has argued that political scientists ought to eschew forecasting entirely in that they are best able to explain what happened as opposed to what may come to pass.Sartori's assertion of course would make historians of us all—and burden us with the historian's smug claim that, if the history examined is too recent, the immediacy of events will distort our vision and bias our judgments. Thus, rather than try to foretell where, say, Germany will move politically next year we should expend (more!) of our resources to establish once and for all what really caused Weimar to collapse and Hitler to come to power.This is not the stuff of political risk analysis. Growing interest in this activity is little based on broad analyses of the past or on long-term forecasts of future events. The potential consumers of political assessments are intelligent, harried bankers and corporate managers who are pressed to make relatively short-term decisions that affect the viability of enterprise and investment-and, equally important, careers-in professions where tenure is unknown.


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