Periodical Waves in the Evolution of Art: Methods of Study

2010 ◽  
Vol 437 ◽  
pp. 530-534
Author(s):  
Alexander V. Kharuto
Keyword(s):  
Social Relations ◽  
Art History ◽  
Historical Data ◽  
Oscillation Period ◽  
Time Interval ◽  
Historical Time ◽  
Stylistic Evolution ◽  
Long Term Trend ◽  
Temporal Segment

Studies of periodical processes in the evolution of art became rather widespread. P. Sorokin described cycles of about several centuries; periods close to 50 years have been observed in social relations by S. Maslov; numerous cycles in the stylistic evolution of art became well known due to C. Martindale. One of important characteristics of art history is the ‘intensity of artistic creativity’, which can be measured as the total (summary) volume of encyclopedic descriptions devoted to artists of appropriate creative sphere during every temporal segment of 1..10 years. These rows of ‘experimental data’ form evolutionary curves on historical time interval of several centuries. Such curves contain two components: a long-term trend and an ‘oscillating part’, which have time constants of about decades of years. In the row of historical data, these oscillations may be represented with only 2..10 ‘waves’ including 2 to 10 sampling points pro oscillation period. The goal of investigation is, to measure parameters of such oscillating components.

scholarly journals THE APPLICATION OF CYCLOSTRATIGRAPHY AND ASTROCHRONOLOGY IN THE NEOGENE MARINE DEPOSITS OF EASTERN MEDITERRANEAN: METOCHIA SECTION (GAVDOS ISLAND)

2006 ◽  
Vol 39 (1) ◽  
pp. 17
Author(s):  
A. Antonarakou ◽  
H. Drinia ◽  
F. Pomoni-Papaioannou
Keyword(s):  
Eastern Mediterranean ◽  
Climatic Changes ◽  
Sea Surface ◽  
Time Interval ◽  
Short Term ◽  
Solar Insolation ◽  
Marine Deposits ◽  
Long Term Trend

Significant lithostratigraphical and micropaleontological signatures, of Milankovitchscale climatic changes are recorded in Miocene deep-sea sediments. As a case study, the Metochia Section, in Gavdos Island, which covers the time interval from 9.7 to 6.6 Ma, is used. This study emphasizes the sedimentological and micropaleontological characteristics of the section, attributed to Milankovitch-scale climatic changes. The short-term variations in climate and faunal composition are related to precession- controlled sedimentary cycles and the long-term trend in climate is related to eccentricity and obliquity cycles. Regional changes in sea surface temperature in combination with variations of solar insolation have caused the cyclical astronomical controlled pattern of Globorotalia species.

scholarly journals Noctilucent clouds observed from the UK and Denmark – trends and variations over 43 years

2008 ◽  
Vol 26 (5) ◽  
pp. 1243-1254 ◽  
Author(s):  
S. Kirkwood ◽  
P. Dalin ◽  
A. Réchou
Keyword(s):  
Time Interval ◽  
Noctilucent Cloud ◽  
Data Set ◽  
Statistical Probability ◽  
Zonal Winds ◽  
Increasing Trend ◽  
The Uk ◽  
Long Term Trend ◽  
10.7 Cm Solar Flux

Abstract. The combined UK/Denmark record of noctilucent cloud (NLC) observations over the period 1964–2006 is analysed. This data set is based on visual observations by professional and voluntary observers, with around 40 observers each year contributing reports. Evidence is found for a significantly longer NLC season, a greater frequency of bright NLC, and a decreased sensitivity to 5-day planetary waves, from 1973–1982, compared to the rest of the time interval. This coincides with a period when the length of the summer season in the stratosphere was also longer (defined by zonal winds at 60° N, 30 hPa). At NLC heights, lower mean temperatures, and/or higher water vapour and/or smaller planetary wave amplitudes could explain these results. The time series of number of NLC nights each year shows a quasi-decadal variation with good anti-correlation with the 10.7 cm solar flux, with a lag of 13–17 months. Using multi-parameter linear fitting, it is found that the solar-cycle and the length of summer in the stratosphere together can explain ~40% of the year-to-year variation in NLC numbers. However, no statistically confidant long-term trend in moderate or bright NLC is found. For NLC displays of moderate or greater intensity, the multi-parameter fit gives a trend of ~0.08 nights (0.35%) per year with a statistical probability of 28% that it is zero, or as high as 0.16 nights (0.7%) per year. There is a significant increasing trend in the number of reports of faint or very faint NLC which is inconsistent with other observations and may be due changes in observing practices.

NAEP Trends: Main NAEP vs. Long-Term Trend

2010 ◽  
Author(s):  
Albert E. Beaton ◽  
James R. Chromy
Keyword(s):  
Term Trend ◽  
Long Term Trend

Institutionalizing the Liberal Creed

2017 ◽  
Author(s):  
Ronen Mandelkern
Keyword(s):  
Political Influence ◽  
Institutional Entrepreneurship ◽  
Political Decision ◽  
Economic Liberalism ◽  
Market Economic ◽  
Ministry Of Finance ◽  
Political Entrepreneurs ◽  
Long Term Trend ◽  
Political Decision Making

This chapter analyzes the role Israeli economists have played as purveyors of pro-market economic ideas and political entrepreneurs of economic liberalization in Israel. Israeli economists were strongly committed to economic liberalism already in the 1950s, but they were lacking decisive political influence. Two mechanisms increased their power over policy. First, long-term institutional changes gradually eroded “political” decision-making mechanism and opened the way to greater involvement of professional economists. This long-term trend was joined and reinforced by economists’ institutional entrepreneurship at the height of the 1980s economic crisis, when they initiated changes of macroeconomic governance. These changes enhanced the political power of the Ministry of Finance and the Bank of Israel and supported the institutionalization of neoliberalism in Israel.

Sign in / Sign up

Export Citation Format

Share Document