scholarly journals Application of EEG Signal Recognition Method Based on Duffing Equation in Psychological Stress Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Min Chai ◽  
Lei Ba
Keyword(s):  
Psychological Stress ◽  
Mental Stress ◽  
Great Influence ◽  
Duffing Equation ◽  
Parameter Analysis ◽  
Eeg Signal ◽  
Signal Recognition ◽  
Initial Values ◽  
The Relationship ◽  
Detection Effect

Based on the study of the feature extraction algorithm based on the multiple empirical mode decomposition of the Duffing equation, this paper proposes a corresponding improved algorithm, completes the identification and analysis of the psychological pressure dimension space under the audiovisual induction method, and designs two typical psychological types of music and pictures. Based on the stress induction experiment, an audiovisual-induced psychological stress recognition system based on EEG (electroencephalogram) signals was built. Aiming at the problem that the spatial uniform sampling method cannot well reflect the dynamic characteristics of the multivariate EEG signal, based on the Duffing equation, a nonuniform sampling algorithm that adaptively selects the projection direction is proposed. At present, the use of the Duffing equation to detect weak unknown signals is to select a set of fixed parameters. Analysis of these two aspects to determine the parameters of the system is based on the parameter analysis of the Duffing equation oscillator. Due to the sensitivity of the Duffing equation to the initial value, the choice of parameters has a great influence on the detection effect. In response to this situation, the relationship between the parameters and initial values of the Duffing equation is analyzed. From the relationship between the parameters and the initial values, the influence of different parameters on the detection effect is analyzed to verify the superiority of the current equation parameters. First, the multichannel EEG signal is nonuniformly sampled multiempirical modal decomposition, and an effective intrinsic modal function is selected to extract the mental stress EEG characteristics. Experimental results show that the EEG signal recognition algorithm based on the Duffing equation effectively extracts EEG signal features and improves the classification accuracy of mental stress EEG signals.

Psychological aspects in the problems of infertility among the population of various countries.

2021 ◽  
pp. 61-69
Author(s):  
I. A. Tliashinova ◽  
◽  
E. N. Mingazova ◽  
Keyword(s):  
Psychological Stress ◽  
Psychological Health ◽  
Sleep Disturbances ◽  
Stressful Life Events ◽  
Assessment Tool ◽  
Reproductive Function ◽  
Fertility Treatment ◽  
Cognitive Behavioral Group Therapy ◽  
Male Reproductive Function ◽  
The Relationship

The problem of infertility in the 21st century has become extremely important for public health in various countries, affecting the birth rate of the population and the number of humanity. Infertility, affecting approximately 8–12% of the world’s population, is associated with factors such as unwillingness to conceive, the age of the female partner, the number of diseases that affect fertility, etc. Questions of the influence of psychological problems, often regarded as the causes of idiopathic infertility, such as stress, depression, sleep disturbances, are of particular interest to researchers. A review of works on the potential impact of stress and depression on reproductive function showed not only a definite relationship, but also the difficulty of determining causal relationships due to the lack of a single assessment tool. P u r p o s e o f t h e s t u d y : to review foreign scientific literature containing information on the role of psychological factors in the formation of reproductive health disorders of the population, including infertility. M a t e r i a l s a n d m e t h o d s : bibliographic, information and analytical methods and the method of comparative analysis were used. R e s u l t s . Mental health issues are often viewed as the causes of female and male infertility. To improve the quality of life of patients with infertility, it is necessary to address the issues of a causal relationship between psychological health and infertility, psychological health when using IVF and ways to solve the problem of psychologically induced infertility. The risk of developing depression and the relationship of a higher degree of anxiety with clinical pregnancy after IVF are shown. Due to the inaccurate data on the relationship between psychological stress and a decrease in male reproductive function, psychological stress is considered in studies as a risk factor for erectile function and ejaculation in men against the background of a high level of stressful life events, compared with women. Findings. Research has proven the effectiveness of psychological support and cognitive-behavioral group therapy in fertility treatment programs, including interventions accompanying IVF. Studies of psychological ways of correcting depression and positive IVF results have shown the importance of programs for influencing the mental state of couples undergoing treatment for infertility reasons.

scholarly journals Irritable bowel syndrome and psychological stress

1999 ◽  
Vol 4 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Barbara S Bayne ◽  
Anita D Stuart ◽  
H Gertie Pretorius
Keyword(s):  
Occupational Stress ◽  
Psychological Stress ◽  
The Other ◽  
Theory Building ◽  
Healthy Controls ◽  
Healthy Individuals ◽  
Daily Stress ◽  
Stress Inventory ◽  
Irritable Bowel ◽  
The Relationship

The purpose of this study was twofold. The first aim was to clarify the relationship between psychological stress and lrritable Bowel Syndrome (IBS) by establishing whether individuals suffering from IBS experience minor stress differently from healthy individuals in terms of its frequency or intensity. The second aim was more general and concerns theory building in a field filled with ambiguity and confusion. Two groups, one comprising IBS sufferers and the other healthy controls, completed the Daily Stress lnventory and the Occupational Stress lnventory - questionnaires designed to measure minor daily and occupational stress respectively. The findings indicate that IBS sufferers do not experience more stress than healthy individuals, but they experience the stressors with greater intensity.OpsommingDie doel van die studie was tweeledig. Eerstens is daar gepoog om duidelikheid te kry oor die verband tussen sielkundige stres en Prikkelbare Dermsindroom (PDS), deur te bepaal of individue wat aan PDS ly geringe stres anders ervaar as gesonde individue in terme van gereeldheid of intensiteit. Die tweede doelwit was meer algemeen en spreek die kwessie van teorie ontwikkeling aan in 'n veld gevul met dubbelsinningheid en verwarring. Twee groepe, een bestaande uit PDS lyers en die ander 'n gesonde kontrolegroep, het die "Daily Stress Inventory'' en die "Occupational Stress Inventory" voltooi. Die vraelyste is ontwerp om onderskeidelik daaglikse stres en werkstres te meet. Die resultate dui daarop dat PDS lyers nie meer stres ervaar as die gesonde individue nie, maar dat hulle wel die stressors ervaar met groter intensiteit.

Erosion Mechanism and Sensitivity Parameter Analysis of Natural Gas Curved Pipeline

2019 ◽  
Vol 141 (3) ◽  
Author(s):  
Jie Zhang ◽  
Hao Yi ◽  
Zhuo Huang ◽  
Jiadai Du
Keyword(s):  
Natural Gas ◽  
Wear Rate ◽  
Shape Factor ◽  
Great Influence ◽  
Solid Particles ◽  
Parameter Analysis ◽  
Particle Collision ◽  
Erosion Wear ◽  
Gas Wells ◽  
The Impact

With the deepening of natural gas exploitation, the problem of sand production in gas wells is becoming more and more serious, especially in high-yield gas wells. The solid particles in natural gas are very likely to cause erosion and wear of downstream pipelines and throttling manifolds, which makes the pipeline ineffective. Once the pipeline is damaged, the natural gas leaks, which may cause serious catastrophic accidents. In this paper, the impact of sand particles on the pipeline wall is predicted by the analysis of the research on bent and continuous pipeline combined with particle collision model. The parameters of different particles (particle shape factor, particle velocity, and particle diameter), different bent parameters (angle, diameter, and curvature-to-diameter ratio), and the influence of different continuous pipeline parameters (assembly spacing and angle) are explored on the erosion and wear mechanism of curved pipeline. The results show that the shape of the particles has a great influence on the wear of the curved pipeline. As the shape factor of the particles decreases, the wear tends to decrease. The bent area is subject to erosion changes as the particle parameters and piping parameters. The increase in pipeline diameter is beneficial to reduce the maximum and the average erosion wear rate. When the bent angle of the pipeline is less than 90 deg, the maximum erosion wear rate is basically the same. But when it is greater than 90 deg, it decreases with the increase in the bent angle. When the assembly angle of double curved pipeline is between 0 deg and 60 deg, the elbow is subject to severe erosion wear. At the same time, increasing the assembly spacing is beneficial to reduce the erosion wear rate. The research can provide a theoretical support for subsequent engineering applications.

scholarly journals Stress as related with Conduct and Achievement in Adolescent Students

2017 ◽  
Vol 4 (3) ◽  
Author(s):  
Priyanka Gautam ◽  
Madhurima Pradhan
Keyword(s):  
Academic Achievement ◽  
Mental Stress ◽  
Stress Reactions ◽  
Government Schools ◽  
Male Adolescents ◽  
Adolescent Students ◽  
Environmental Event ◽  
Teachers And Parents ◽  
Relationship Of ◽  
The Relationship

Stress reactions occur when an environmental event taxes one’s ability to cope. The study investigated the relationship of stress with conduct and achievement. A sample of 60 students (14-18 years) from Government schools was incidentally selected. Stress was measured with the help of a scale by (Tubesing and Tubesing, 1983) which assesses symptoms of physical, emotional and mental stress. Conduct was assessed in terms of the judgment of class teacher on a bipolar adjective checklist developed by the researcher about different behaviours of the student like punctuality, perseverance etc. Average marks obtained by a student throughout one academic session was used as a measure of academic achievement. The results revealed higher level of stress, specially emotional stress among male adolescents as compared to females; better conduct and academic achievement by females. Mental stress was found to be negatively correlated with achievement for both but with conduct for females only. Overall stress was found to be significantly negatively correlated with achievement in females; positive correlation between conduct and academic achievement was found. The study implies that out of different forms of stress, mental stress has more deleterious impact on academic achievement of adolescents; although females have been found to be higher in good conduct, mental stress undermines it too. Findings suggest a need for training of teachers and parents to help their wards in developing the skills to manage mental stress.

scholarly journals Influence of Psychological Stress on Periodontal Diseases

2020 ◽  
Vol 2 (1) ◽  
pp. 1-5
Author(s):  
Larissa Marques Storto Soares ◽  
Ana Emilia Farias Pontes ◽  
Fernanda de Oliveira Bello Corrêa ◽  
Cleverton Corrêa Rabelo
Keyword(s):  
Risk Factor ◽  
Periodontal Disease ◽  
Psychological Stress ◽  
Psychological Factors ◽  
Positive Relationship ◽  
Periodontal Diseases ◽  
Psychosocial Factor ◽  
Research Needs ◽  
The Relationship

Introduction: The association between periodontal disease and stress has been questioned for a almost a century, however, it still represents an unexplored field of research with several orphaned questions of conclusive answers. Objective: To evaluate the relationship between periodontal disease and stress. Methodology: Searches were performed with descriptors related to periodontal diseases and psychological factors in the following databases: Pubmed, Embase, Lilacs. Were identified and included studies that deal with the relationship between stress and periodontal disease and /or that emphasize the role of this psychosocial factor in the progression of periodontal disease. Conclusion: Most studies have shown a positive relationship between periodontal disease and stress, however, further research needs to be developed to confirm stress as a risk factor for periodontal disease

scholarly journals Cypriot P.E. Teachers' Opinions on Occupational Prestige and Social Capital

2009 ◽  
Vol 46 (1) ◽  
pp. 116-122 ◽  
Author(s):  
Diana Christodoulou
Keyword(s):  
Social Capital ◽  
Labour Market ◽  
Great Influence ◽  
Survey Method ◽  
Physical Education Teachers ◽  
Occupational Prestige ◽  
Special Role ◽  
Documentary Analysis ◽  
Study Results ◽  
The Relationship

Cypriot P.E. Teachers' Opinions on Occupational Prestige and Social CapitalPhysical Education teachers have a special role in the community but sometimes their fellow citizens may not be conscious of it. This paper is based on research which was conducted in order to study P.E. teachers' opinions about the relationship between social capital and their employment in the different sectors. Another objective of this article is to find out how P.E. teachers perceive themselves in relation to other occupations and whether they are satisfied with their position in the Cypriot labour market. The methods applied for this research were documentary analysis and survey method, but it is essential to remark that this paper is based on a larger investigation. Two sub-samples were created in order to compare their opinions towards the three objectives of this study. Results indicate that according to P.E. teachers; medical doctors have the highest prestige in Cyprus. They also believe that social capital has a great influence on their employment at the Cypriot Sport Organization but it is important to note that the majority of them are satisfied with their position in the labour market. This paper provides some evidence about the opinions and feelings of Cypriot P.E. teachers.

scholarly journals The Proposal and Research on the Most Basic Problem of Fault Diagnosis

2020 ◽  
Author(s):  
Hu Jun
Keyword(s):  
Fault Diagnosis ◽  
Basic Problem ◽  
Scientific Basis ◽  
Parameter Analysis ◽  
Analytic Method ◽  
Systematic Development ◽  
The Relationship

Abstract By keep asking “what happened to the part that was connected between normal and fault?” The basic problem of fault diagnosis is put forward. Based on the parameter analysis, the most basic problem of fault diagnosis is pointed to the generalized stiffness looseness through the congenital underlying logic presupposition of the fault. The relationship between generalized looseness, part fault and system fault is analyzed by analytic method, which further proves that looseness fault is the most basic problem in fault diagnosis.Finally, the essential priority of looseness fault in fault diagnosis is expounded.The essential priority of loosening fault in fault diagnosis explains the basic problem of fault diagnosis and provides a scientific basis for the systematic development of fault diagnosis.

Frailty in Caregivers and Its Relationship with Psychological Stress and Resilience: A Cross-Sectional Study Based on the Deficit Accumulation Model

2021 ◽  
pp. 1-8
Author(s):  
M. F.S. Bersani ◽  
F.S. Bersani ◽  
F. Sciancalepore ◽  
M. Salzillo ◽  
M. Cesari ◽  
...  
Keyword(s):  
Psychological Stress ◽  
Frailty Index ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Deficit Accumulation ◽  
Cross Sectional ◽  
Accumulation Model ◽  
Emotional Strain ◽  
Relationship Of ◽  
The Relationship

Background: Studies increasingly suggest that chronic exposure to psychological stress can lead to health deterioration and accelerated ageing, thus possibly contributing to the development of frailty. Recent approaches based on the deficit accumulation model measure frailty on a continuous grading through the “Frailty Index” (FI), i.e. a macroscopic indicator of biological senescence and functional status. OBJECTIVES: The study aimed at testing the relationship of FI with caregiving, psychological stress, and psychological resilience. DESIGN: Cross-sectional study, with case-control and correlational analyses. PARTICIPANTS: Caregivers of patients with dementia (n=64), i.e. individuals a priori considered to be exposed to prolonged psychosocial stressors, and matched controls (n=64) were enrolled. MEASUREMENTS: The two groups were compared using a 38-item FI condensing biological, clinical, and functional assessments. Within caregivers, the association of FI with Perceived Stress Scale (PSS) and Brief Resilience Scale (BRS) was tested. RESULTS: Caregivers had higher FI than controls (F=8.308, p=0.005). FI was associated directly with PSS (r=0.660, p<0.001) and inversely with BRS (r=-0.637, p<0.001). Findings remained significant after adjusting for certain confounding variables, after excluding from the FI the conditions directly related to psychological stress, and when the analyses were performed separately among participants older and younger than 65 years. CONCLUSIONS: The results provide insight on the relationship of frailty with caregiving, psychological stress, and resilience, with potential implications for the clinical management of individuals exposed to chronic emotional strain.

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