scholarly journals High-frequency cerebral activation and interhemispheric synchronization following sudarshan kriya yoga as global brain rhythms: The state effects

2020 ◽  
Vol 13 (2) ◽  
pp. 130
Author(s):  
Chhaya Kharya ◽  
Lakshmi Bhaskar ◽  
Vaibhav Tripathi ◽  
Vijayalakshmi Kotabagi ◽  
Manvir Bhatia ◽  
...  
Keyword(s):  
High Frequency ◽  
The State ◽  
Cerebral Activation ◽  
Brain Rhythms ◽  
Global Brain

scholarly journals Research into Correlation between the Lubrication Mode of Contact Surfaces and Dynamic Parameters of Turbo-Generator Transmissions

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Marek Kočiško ◽  
Petr Baron ◽  
Monika Telíšková ◽  
Jozef Török ◽  
Anna Bašistová
Keyword(s):  
Acoustic Emission ◽  
High Frequency ◽  
High Speed ◽  
Oil Quality ◽  
The State ◽  
Dynamic Parameters ◽  
High Frequency Vibration ◽  
Turbo Generator ◽  
Friction Mode ◽  
Contact Surfaces

The paper presents the results of an experimental study aimed at assessing the correlation between the measurement of dynamic parameters (vibration, high-frequency vibration, and acoustic emission) and the analysis of friction mode and the state of lubrication of the contact surfaces of two gearboxes in the turbo-generator assembly (high-speed single-body steam turbine—gearbox—generator) with the transmission power of no more than 50 MW. The analysis confirmed the assumption of a significant correlation of the monitored high-frequency vibration signal with the unsatisfactory engagement of the gear teeth. Through vibration analysis, an increased level of the tooth vibration component and vibration multiples with increased acoustic emission were identified in gearbox operation. The gear oil of one of the gearboxes examined showed a loss of additive elements in the real operation of the contact surfaces of the teeth engagement. The trend analysis confirmed the complexity of the monitored transmission operation in terms of the friction mode and the influence of the oil quality on the state of the tooth flank microgeometry.

Assessment of the Chinese Literature for Nursing Informatics Education Initiatives

2021 ◽  
Author(s):  
Siri Liu ◽  
Tao Zheng ◽  
Jinbo Fang ◽  
Jialin Liu
Keyword(s):  
High Frequency ◽  
Chinese Literature ◽  
Mainland China ◽  
The State ◽  
Nursing Informatics ◽  
China National Knowledge Infrastructure ◽  
Knowledge Infrastructure ◽  
Research Themes ◽  
Education Initiatives

The purpose of this study is to understand the state of the literature on nursing informatics education in Mainland China. We used the CNKI database (China National Knowledge Infrastructure) to extract all papers of nursing informatics education from 2009 to 2018. 20 high-frequency keywords, a co-word matrix, and three research themes were conducted on the 18 papers. These results can be used to improve our understanding of nursing informatics education in Mainland China.

SQUEEZING EFFECTS IN THE SUM AND DIFFERENCE OF THE FIELD AMPLITUDE IN THE RAMAN PROCESS

2005 ◽  
Vol 19 (25) ◽  
pp. 1261-1276 ◽  
Author(s):  
DILIP KUMAR GIRI ◽  
P. S. GUPTA
Keyword(s):  
High Frequency ◽  
Higher Order ◽  
The State ◽  
Field Amplitude ◽  
Frequency Mode ◽  
Difference Frequency ◽  
Field Mode ◽  
High Frequency Mode ◽  
Frequency Field ◽  
Raman Process

Sum and difference squeezing of the field amplitude are higher-order squeezing effects. These effects are studied in the Raman process under the short-time approximation based on a fully quantum mechanical approach. It is shown that for uncorrelated modes, the normal squeezing in the sum and difference-frequency field depends on the sum and difference squeezing of input field modes respectively, which can generate normal squeezing in the sum and difference-frequency field mode. All the possibilities for obtaining sum and difference squeezing in two modes and its dependence on squeezing of individual field modes are investigated. We have also shown that if the high-frequency mode is in a coherent state and the low-frequency mode is squeezed, the field state will be difference squeezed if the amplitude of the high-frequency mode is large enough; otherwise the state may or may not be difference squeezed. If both modes are squeezed, then the state may or may not be difference squeezed. These higher-order squeezing effects are useful in the production of squeezing in the Raman process.

scholarly journals Socio demographic characterization of users of Child and Adolescent Psychosocial Care Centers in the state of São Paulo

2013 ◽  
Vol 30 (3) ◽  
pp. 383-391 ◽  
Author(s):  
Ana Cecília Andrade de Moraes Weintraub ◽  
Michelle de Sousa Vasconcellos ◽  
Isabella Teixeira Bastos ◽  
Felipe Lessa da Fonseca ◽  
Alberto Olavo Advíncula Reis
Keyword(s):  
Mental Disorders ◽  
High Frequency ◽  
Nuclear Family ◽  
Psychosocial Care ◽  
Sao Paulo ◽  
The State ◽  
São Paulo ◽  
Severe Mental Disorders ◽  
Regular School

The "Centros de Atenção Psicossocial Infanto-Juvenil" are dispositives of treatment for children and adolescents suffering from severe mental disorders. This article describes sociodemografic characteristics of users of those centers between September 2008 and February 2009 in the state of São Paulo, Brazil. Data from active files randomly selected was collected in 19 Centers in the state of São Paulo. The characteristics analyzed were divided in four groups of variables: identity; living conditions; family structure; schooling and occupation. The results indicated a higher concentration of users between 10 to 14 years-old; prevalence of males; tendency to nuclear and reduced family arrangements (45%); care primarily given by the mother (57%) and high frequency of users attending the regular school (86%). It was possible to identify a well-defined socio demographic profile of users, with differences regarding gender, attending the regular school and/or other institutions, as well as sharing a nuclear family arrangement.

scholarly journals The State of the Cardiovascular System of Qualified Table Tennis Athletes at the Stage of Competitive Activity

2021 ◽  
Vol 6 (4) ◽  
pp. 231-236
Author(s):  
Ulizko V. M. ◽  
◽  
V. R. Kryzhanivsky ◽  
T. M. Zakharkevich ◽  
I. L. Belyavsky
Keyword(s):  
Physical Activity ◽  
Heart Rate ◽  
Cardiovascular System ◽  
High Frequency ◽  
Heart Rhythm ◽  
Frequency Component ◽  
The State ◽  
Autonomic Regulation ◽  
The Body ◽  
High Frequency Component

The condition of the cardiovascular system is one of the important criteria for assessing the impact of sports training on the human body. According to the indicators characterizing the state of the cardiovascular system, it is possible to trace the changes associated with fluctuations in the level of training, as well as to identify signs of overload as early as possible. The study of adaptive reactions of the cardiovascular system in athletes under physical activity is an important indicator for sports practice. The purpose of the study was to investigate the quantitative criteria for assessing the state of the cardiovascular system and approaches to correct the functional state of qualified athletes specializing in table tennis. Materials and methods. Studies of heart rate variability, quantitative and qualitative indicators that sufficiently reflect the autonomic functions of the body were used in order to assess the state of autonomic regulation in highly qualified athletes. Systematic physical activity causes a significant restructuring of the cardiovascular system and leads to morphofunctional changes in the mechanisms of the heart. Depending on the autonomic regulation of heart rhythm, there are different ways of myocardial adaptation processes. The balance of sympathetic and parasympathetic links of autonomic rhythm regulation is reflected in the activation of the left ventricle. Results and discussion. Adaptive changes of the cardiovascular system to competitive and training loads in the competitive period in qualified athletes are characterized by a significant decrease in heart rate (from 84.75±1.74 beats / min to 74.8±0.38 beats / min). In addition, a significantly faster process of restoring heart rate was established after exercise in the group of qualified athletes, compared with athletes of the category 1 at 4 (p >0.05) and 5 (p >0.05) minutes, respectively. According to the indicators of autonomic regulation of heart rhythm, activation of the parasympathetic link prevails in athletes of the category 1 in comparison with qualified athletes activation (according to high-frequency component, p <0.05). Significantly higher rates of individual parts of the body compared to low-skilled athletes were found out: the hormonal system (the indicator responsible for the hormonal part of the body – very low-frequency component) and the nervous system (indicators of the sympathetic nervous system – low frequency component). There are significantly higher values of the magnitude of the heart rate spectrum and high-frequency component at p <0.05, which indicates a higher power of all units of the parasympathetic regulation in the category 1 in relation to masters of sports and candidates masters of sports. Conclusion. Systematic physical activity causes a significant restructuring of the cardiovascular system and leads to morphofunctional changes in the mechanisms of the heart. Depending on the autonomic regulation of heart rhythm, there are different ways of myocardial adaptation processes. The balance of sympathetic and parasympathetic links of autonomic rhythm regulation is reflected in the activation of the left ventricle. The analysis showed that the spectral characteristics of heart rate variability significantly differ between groups of athletes with different dominance that are observed only in terms of high-frequency component, which in turn led to a change in the sympathetic-vagal balance

scholarly journals Switchable DBR Filters Using Semiconductor Distributed Doped Areas (ScDDAs)

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2021
Author(s):  
Rozenn Allanic ◽  
Denis Le Berre ◽  
Cédric Quendo ◽  
David Chouteau ◽  
Virginie Grimal ◽  
...  
Keyword(s):  
High Frequency ◽  
Degrees Of Freedom ◽  
State Of The Art ◽  
Active Surface ◽  
The State ◽  
Semiconductor Substrate ◽  
Great Flexibility ◽  
Active Elements ◽  
Insertion Losses ◽  
Good Agreement

This paper presents a novel way to switch dual-behavior resonator (DBR) filters without any additional active surface-mount components. By using a semiconductor substrate, we were able to simultaneously co-design the filters and semiconductor distributed doped areas (ScDDAs) with integrated N+PP+ junctions as active elements. These ScDDAs act as electrical vias in the substrate, which makes it possible to have an open-circuited resonator in the OFF state and a short-circuited resonator in the ON state, and, consequently, to control the transmission zeroes of the filters. This method offers degrees of freedom as the dimensions and positions of these doped areas can be chosen to obtain the best performances. In this study, four filters were simulated and fabricated to spotlight different possibilities for the dimensions and positions of the ScDDA to control the low- or high-frequency transmission zero of the filters. The simulations were in very good agreement with the measured results. All the filters present insertion losses lower than 2 dB in the OFF and ON states, a great flexibility in the frequency choice, and good agility compared with the state of the art.

scholarly journals The mean lives of excited neon atoms

1934 ◽  
Vol 143 (850) ◽  
pp. 588-604 ◽  
Keyword(s):  
Excited States ◽  
High Frequency ◽  
The State ◽  
Reliable Information ◽  
Neon Atom ◽  
Average Life ◽  
High Frequency Discharge ◽  
First Approximation ◽  
The Mean ◽  
Upper Level

Since the first experiments by Wien many methods have been used to find the average lives of the excited states of different atoms. Most of these methods are applicable to particular atoms only, and the amount of reliable information in this field is still surprisingly meagre. The method described here depends in effect on the measurement of the lag which exists between the excitation and emission of light from atoms in a high-frequency discharge. This lag, or rather quantity actually measured, is itself a first approximation to the average life τ of the state concerned, and it is shown later how a more accurate value of τ may be deduced from it. Results are given for six excited states of the neon atom, but the method may be used for any substance whose spectrum can be obtained from a high-frequency discharge. The values of τ for neon range from 3·9 to 20·10 -8 seconds, and it is shown that lines originating from the same upper level lead to the same value of τ for that level.

A Novel Strategy for the Identification of Radiation Force Models

2014 ◽  
Author(s):  
Roman M. Janssen ◽  
Henk Jansen ◽  
Jan-Willem van Wingerden
Keyword(s):  
Asymptotic Behavior ◽  
Frequency Domain ◽  
High Frequency ◽  
State Of The Art ◽  
Radiation Force ◽  
The State ◽  
Test Cases ◽  
Subspace Identification ◽  
Domain Identification

A novel frequency domain identification (FDI) strategy for the identification of radiation force models from frequency domain hydrodynamic data is proposed. First, a subspace identification method is augmented with a convex constraint that guarantees a stable solution. Then, in a second convex optimization problem, constraints on low- and high frequency asymptotic behavior and passivity are enforced. This novel method, constrained frequency domain subspace identification (CFDSI), is validated by comparing both SISO and MIMO CFDSI results with the state-of-the-art FDI toolbox, which is part of the Marine Systems Simulator MATLAB toolbox. In two test cases, it is shown that the novel algorithm can successfully identify a model with either a SISO or MIMO structure, where stability, passivity and the desired low- and high-frequency asymptotic behavior are guaranteed. For the two test cases presented, the quality of the CFDSI models matches the quality of the state-of-the-art FDI models.

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