scholarly journals CORRELATION ANALYSIS BETWEEN SCHUMANN RESONANCE FREQUENCIES AND Dst, Kp

2021 ◽  
Author(s):  
Murat CANYILMAZ ◽  
Esat GUZEL ◽  
Emrah YALÇIN
Keyword(s):  
Correlation Analysis ◽  
Schumann Resonance ◽  
Resonance Frequencies

scholarly journals Modifications of the middle atmosphere conductivity during sudden ionosphere disturbances and variations of schumann resonance frequencies

2018 ◽  
Vol 23 (1) ◽  
pp. 19-33
Author(s):  
I. Kudintseva ◽  
◽  
Y. Galyuk ◽  
A. Nikolaenko ◽  
M. Hayakawa ◽  
...  
Keyword(s):  
Middle Atmosphere ◽  
Schumann Resonance ◽  
Resonance Frequencies

Experimental investigations of Schumann resonance frequencies

1973 ◽  
Vol 35 (11) ◽  
pp. 2047-2053 ◽  
Author(s):  
K. Sao ◽  
M. Yamashita ◽  
S. Tanahashi ◽  
H. Jindoh ◽  
K. Ohta
Keyword(s):  
Experimental Investigations ◽  
Schumann Resonance ◽  
Resonance Frequencies

MODIFICATIONS OF MESOSPHERIC CONDUCTIVITY IN SUDDEN IONOSPHERE DISTURBANCES AND CHANGES OF THE SCHUMANN RESONANCE FREQUENCIES

2018 ◽  
Vol 77 (8) ◽  
pp. 727-746
Author(s):  
I. G. Kudintseva ◽  
Yu. P. Galyuk ◽  
A. P. Nickolaenko ◽  
Masashi Hayakawa
Keyword(s):  
Schumann Resonance ◽  
Resonance Frequencies

scholarly journals Influence of Magnetic Field with Schumann Resonance Frequencies on Photosynthetic Light Reactions in Wheat and Pea

Cells ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 149
Author(s):  
Vladimir Sukhov ◽  
Ekaterina Sukhova ◽  
Yulia Sinitsyna ◽  
Ekaterina Gromova ◽  
Natalia Mshenskaya ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Yield ◽  
Photosystem Ii ◽  
Chronic Treatment ◽  
Quantum Yields ◽  
Photochemical Quenching ◽  
Schumann Resonance ◽  
Short Term ◽  
Resonance Frequencies ◽  
Non Photochemical Quenching

Photosynthesis is an important target of action of numerous environmental factors; in particular, stressors can strongly affect photosynthetic light reactions. Considering relations of photosynthetic light reactions to electron and proton transport, it can be supposed that extremely low frequency magnetic field (ELFMF) may influence these reactions; however, this problem has been weakly investigated. In this paper, we experimentally tested a hypothesis about the potential influence of ELFMF of 18 µT intensity with Schumann resonance frequencies (7.8, 14.3, and 20.8 Hz) on photosynthetic light reactions in wheat and pea seedlings. It was shown that ELFMF decreased non-photochemical quenching in wheat and weakly influenced quantum yield of photosystem II at short-term treatment; in contrast, the changes in potential and effective quantum yields of photosystem II were observed mainly under chronic action of ELFMF. It is interesting that both short-term and chronic treatment decreased the time periods for 50% activation of quantum yield and non-photochemical quenching under illumination. Influence of ELFMF on pea was not observed at both short-term and chronic treatment. Thus, we showed that ELFMF with Schumann resonance frequencies could influence photosynthetic light processes; however, this effect depends on plant species (wheat or pea) and type of treatment (short-term or chronic).

Microdensitometer—computer correlation analysis of ultrastructural periodicity

1978 ◽  
Vol 36 (2) ◽  
pp. 32-33
Author(s):  
D.R. Ensor ◽  
C.G. Jensen ◽  
J.A. Fillery ◽  
R.J.K. Baker
Keyword(s):  
Correlation Analysis ◽  
Background Noise ◽  
Computer Control ◽  
Optical Diffraction ◽  
Screw Thread ◽  
Straight Line ◽  
Computer Storage ◽  
Correlation Process ◽  
Electron Microscope Image ◽  
Fixed Beam

Because periodicity is a major indicator of structural organisation numerous methods have been devised to demonstrate periodicity masked by background “noise” in the electron microscope image (e.g. photographic image reinforcement, Markham et al, 1964; optical diffraction techniques, Horne, 1977; McIntosh,1974). Computer correlation analysis of a densitometer tracing provides another means of minimising "noise". The correlation process uncovers periodic information by cancelling random elements. The technique is easily executed, the results are readily interpreted and the computer removes tedium, lends accuracy and assists in impartiality.A scanning densitometer was adapted to allow computer control of the scan and to give direct computer storage of the data. A photographic transparency of the image to be scanned is mounted on a stage coupled directly to an accurate screw thread driven by a stepping motor. The stage is moved so that the fixed beam of the densitometer (which is directed normal to the transparency) traces a straight line along the structure of interest in the image.

The German Strengths and Difficulties Questionnaire (SDQ)

2010 ◽  
Vol 26 (4) ◽  
pp. 256-262 ◽  
Author(s):  
Ulrike Petermann ◽  
Franz Petermann ◽  
Ina Schreyer
Keyword(s):  
Correlation Analysis ◽  
Teacher Ratings ◽  
Screening Instrument ◽  
Preschool Age ◽  
Strengths And Difficulties Questionnaire ◽  
Preschool Age Children ◽  
Discriminant Analyses ◽  
Strengths And Difficulties ◽  
Behavioral Attributes ◽  
And Behavior

The Strengths and Difficulties Questionnaire (SDQ) is a screening instrument that addresses positive and negative behavioral attributes of children and adolescents. Although this questionnaire has been used in Germany to gather information from parents and teachers of preschoolers, few studies exist that verify the validity of the German SDQ for this age. In the present study, teacher ratings were collected for 282 children aged 36 to 60 months (boys = 156; girls = 126). Likewise, teacher ratings were collected with another German checklist for behavior problems and behavior disorders at preschool age (Verhaltensbeurteilungsbogen für Vorschulkinder, VBV 3–6). Moreover, children’s developmental status was assessed. Evaluation included correlation analysis as well as canonical correlation analysis to assess the multivariate relationship between the set of SDQ variables and the set of VBV variables. Discriminant analyses were used to clarify which SDQ variables are useful to differentiate between children with or without developmental delay in a multivariate model. The results of correlation and discriminant analyses underline the validity of the SDQ for preschoolers. According to these results, the German teacher SDQ is recommended as a convenient and valid screening instrument to assess positive and negative behavior of preschool age children.

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