Multifrequency Study of Giant Radio Pulses from the Crab Pulsar with the K5 VLBI Recording Terminal

Simultaneous multifrequency observations of the Crab pulsar giant pulses (GPs) were performed with the 64-m Kalyazin radio telescope at four frequencies 0.6, 1.4, 2.2 and 8.3 GHz using the K5 VLBI recording terminal. The K5 terminal provided continuous recording in 16 4-MHz wide frequency channels distributed over 4 frequency bands. Several thousands of GPs were detected during about 6 hours of observations in two successive days in July 2005. Radio spectra of single GPs were analysed at separate frequencies and over whole frequency range. These spectra manifest notable modulation over frequency ranges, $\Delta\nu$, both on large ($\Delta\nu/\nu\approx 0.5$) and small ($\Delta\nu/\nu\approx 0.01$) frequency scales. Cross-correlation analysis of GPs at 2.2 GHz showed that their pulse shapes can be interpreted as an ensemble of unresolved bursts grouped together at time scales of $\approx 1$ mcs being well-correlated over a 60-MHz band. The corresponding GP cross-correlation functions do not obey the predictions of the amplitude-modulated noise model of Rickett (1975), thus indicating that unresolved components represent a small number of elementary emitters.Comment: 22 pages, 11 figures, 3 tables, submitted to PAS

Connection between types of learning by P.Ya. Galperin with kinds of thinking in school students

In order to determine the correlational relations mentioned in the title here above, a number of experiments with school students have been carried out. They included knowledge instruction on the basis of Galperin’s types of learning on three school subjects (history, biology, geometry); checking the level of logical thinking by means of solving a number of tasks that include basic logical operations such as categorization, generalization, classification, deductive conclusions, finding of analogies and equalizing of variables; estimation of the development level of abilities for searching solutions of insight problems by the results of solving five such problems taken from the set of tasks used in researches on creative thinking; appraisal of the development level of creativity by using the subtest “sketches” in Guilford’s technique. The sample included 132 school students of the 7th grades from Yekaterinburg schools, Russia. The obtained data were processed statistically using Pearson and Spearman coefficients. Concerning the correlations studied, the following results have been received. The effectiveness of 1st type of learning is strongly connected with the development of logical thinking (r=0,54), is moderately connected with the ability to solve convergent problems (r=0,34) and is not connected with the ability to solve creative divergent tasks. The effectiveness of 2nd type of learning is connected with the level of logical operations development (r=0,29 for facts and r=0,57 for proofs) and is not connected with the ability to solve convergent and divergent problems. The effectiveness of the 3rd type of learning does not deal with solving convergent tasks, is hardly connected with flexibility (r=0,25) and ingenuity (r=0,21) of solving creative tasks, and even less the 2nd type of learning is connected with logical development when logically complex knowledge is assumed (r=0,48). The established ties give grounds to suggest that the use of the 1st type of learning should develop the abilities for solving insight problems and should not develop creativity in course of instruction, the 2nd type of learning has potential of logical operations development; the 3rd type of learning can contribute to logical operations development and is partially to raise creative potential and can hardly promote abilities for solving insight problems

Oil Production and Carbon Emissions: Spline Analysis of Relationships

Obviously, the dynamics of carbon dioxide emissions depends on the volume and structure of consumption of primary energy resources in the economy. The world’s energy consumption shows a growth trend temporarily interrupted during times of economic crisis. The most noticeable decrease in energy consumption in modern history occurred in 2020, which was due to a decline in business activity in the world due to the COVID-19 pandemic. This caused a decrease in carbon emissions (by more than 6% compared to 2019). In the structure of primary energy sources, the largest reduction was in oil consumption. The paper examines the impact of economic crises on the evolution of the mutual link between the dynamics of oil production and carbon dioxide emissions in the world. To detect correlations in local time regions, it is proposed to interpolate process dynamics with cubic splines. Using this toolkit avoids the limitations of classical econometrics on the length of time series. The differentiability of the built spline models allowed us to move on to identifying and analyzing latent correlations in fluctuations in the instantaneous growth rate of oil production volumes and carbon emissions

State of the autonomic nervous system in men with idiopathic manifestations of overactive bladder

As a result of routine inspections of an organized group of healthy men 35–55 years, 1.5 % revealed abnormalities in the urinary tract are not contacts to urological disorders. As a result of a comprehensive survey neurological they are classified as idiopathic overactive bladder. A study of the parameters of the autonomic nervous system as one of the regulators of the process of urination and a possible trigger revealed pathology. The analysis of the comparative study of kardiointervalogramm and spectral analysis of heart rate revealed that the clinical manifestations of idiopathic overactive bladder in men realized in terms of tension of regulatory systems dominated by executives sympathoadrenal autonomic nervous system.</em

Macro-Regional Analysis of the Carbon Intensity of the Economy

Achieving the Sustainable Development Goals formulated by the UN is one of the priorities of modern economic policy. At the same time, its implementation should take into account the macro-regional specifics. Without this kind of accounting, due to the emerging imbalances, it will not be possible to ensure the sustainability of development. One of the components of sustainable development is the decarbonization of the economy. The purpose of the study: macro-regional analysis of the mutual impact of energy consumption, carbon dioxide emissions and economic growth trends. At a time when ensuring sustainable economic growth is an important task of economic policy, improving energy efficiency turns out to be a key factor in reducing carbon emissions. Research methods: dynamics analysis, structure analysis, methods of comparative analysis and generalization. The article studies the dynamics of changes in the carbon intensity of GDP on the example of two countries with the largest economies — the United States and China. The analysis showed that macro-regions with a high level of technological development manage to reduce carbon dioxide emissions more intensively, while ensuring economic growth

Giant Pulses -- the Main Component of the Radio Emission of the Crab Pulsar

The paper presents an analysis of dual-polarization observations of the Crab pulsar obtained on the 64-m Kalyazin radio telescope at 600 MHz with a time resolution of 250 ns. A lower limit for the intensities of giant pulses is estimated by assuming that the pulsar radio emission in the main pulse and interpulse consists entirely of giant radio pulses; this yields estimates of 100 Jy and 35 Jy for the peak flux densities of giant pulses arising in the main pulse and interpulse, respectively. This assumes that the normal radio emission of the pulse occurs in the precursor pulse. In this case, the longitudes of the giant radio pulses relative to the profile of the normal radio emission turn out to be the same for the Crab pulsar and the millisecond pulsar B1937+21, namely, the giant pulses arise at the trailing edge of the profile of the normal radio emission. Analysis of the distribution of the degree of circular polarization for the giant pulses suggests that they can consist of a random mixture of nanopulses with 100% circular polarization of either sign, with, on average, hundreds of such nanopulses within a single giant pulse.Comment: 13 pages, 6 figures (originally published in Russian in Astronomicheskii Zhurnal, 2006, vol. 83, No. 1, pp. 62-69) translated by Denise Gabuzd