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Search Results: 1 - 10 of 14260 matches for " Stress "
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Ruggeri, Elysio R. F.;
Rem: Revista Escola de Minas , 2003, DOI: 10.1590/S0370-44672003000100006
Abstract: in this paper i broaden the common text about stress theory for cases when the system of curvilinear coordinates used for the solution of a problem is not orthogonal. in this case, as it is possible to associate four different matrices to the stress dyadic of a point, i physically interpret the elements of all these matrices. that implies generalizing the classical principle of reciprocity of the tangential stress in orthogonal planes. in the remaining part of this paper i derive the main classical results related to eigenvalues and eigenvectors of the stress dyadic.
The Level of Academic and Environmental Stress among College Students: A Case in the College of Education  [PDF]
Dawit Yikealo, Bereket Yemane, Ikali Karvinen
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.611004
Abstract: Stress that can arise from various academic and environmental aspects is very common among college students. Uncontrollable stress lowers academic, social, environmental, psychological and physical adjustment. In this research, the level of academic and environmental stress among College of Education (CoE) in EIT was intensively discovered. It was explored in relation to the students’ cumulative GPA and gender. The major academic and environmental factors that contribute to more stress among the college students was of a great interest in the study. Moreover, investigating the stress management strategies practiced by the college students was among the main concerns. To obtain a reliable data, a total of 107 students of 2nd, 3rd, and 4th year of the College of Education were randomly and conveniently selected to fill the self-developed questionnaire and in the focus group discussion. The data were analysed with the help of descriptive and inferential statistical techniques. The data computation process was assisted by a Software Package for Social Sciences (SPSS). The study findings reveal that majority of the College of Education students experience a moderate level of academic and environmental stress. Gender and Cumulative GPA of the students were also found not to have statistically significant difference. However, CGPA was merely found to have a slight statistically significant relationship with the level of environmental stress. Majority of the students expressed as they practice various positive stress management strategies. The study is expected to contribute a lot in assessing the level of stress and identifying the most stressful academic and environmental factors.
Level of Stress, Predisposing Factors and Status of Mental Health among Pharmacy Students of a Private University of Dhaka, Bangladesh: A Cross Sectional Study  [PDF]
A. H. M. Nazmul Hasan, Md. Anzam Ul Islam, Smaranika Rahman, Zobaida Mostarin Nishi, Md. Jakir Hossain, Md. Zobayer Hossain Gorapi, Farhan Jamil, Md. Abu Sufian, Zabun Nahar, Kanij Nahar Deepa, Md. Hamiduzzaman, Md. Asaduzzaman, Mohiuddin Ahmed Bhuiyan
Health (Health) , 2019, DOI: 10.4236/health.2019.112020
Abstract: Stress during tertiary educational period has significant negative effect on the performance of a student. Mental distress is increasing among students and is one of the important public health concerns. This study was carried out to investigate the socio demographic characteristics of students, level of their stress feeling, and status of mental health and to find out the co-relation of different factors associated with the level of stress feelings. A cross sectional study was conducted among the students of the Department of Pharmacy of UAP. A total of 504 students (181 male students and 323 female students) participated in this study. Feeling of severe stress was almost equal to both sexes. But, moderate level of stress was more associated with female students (N = 253, F = 78.33%) and overall female students were more stressful than male. Thought towards future career ranked one among many reasons of stress in students (59.67% for male students and 37.46% for female students). In terms of academic achievements, feeling of stress was higher in female students compared to male students (34.98% for female students vs. 15.47% for male students). Other factors such as unrealistic expectations, family relationship and affairs, socio economic condition, being of too busy also significantly participate in the development of stress in young mind. Mental health status was estimated by considering some facts such as state of shock due to unwanted life events, lacking of expression of emotions, reduced feeling of pleasure, unusual thinking, fear of any specific objects, short term memory loss, self identity disorder and lack of self confidence. We co-related different risk factors like age, gender, socio-economic condition, unrealistic thought patter to different levels of stress feeling. Feelings of stress were most among the student of 21 - 25 years of age. Socio-economic condition is always a great factor of stress, middle class society has more stress compared to other socio-economic classes. Psychological counseling is required in educational institution to detect and prevent mental distress and stress among students.
Professional Stress in Journalism: A Study on Electronic Media Journalists of Bangladesh  [PDF]
Kazi Nazmul Huda, Abul Kalam Azad
Advances in Journalism and Communication (AJC) , 2015, DOI: 10.4236/ajc.2015.34009
Abstract: To meet the objectives of professional assignments, journalists often suffer from high level professional stress. The key objective of this study is to identify the major determinants of professional stress of journalists in electronic media. The study is, to a large extent, based on quantitative data collected through personal interview of 55 journalists of different private television channels of Bangladesh. The study reveals that inadequate support from management is the most heated cause of professional stress. However, the result also concludes “harassment” at workplace as an insignificant determinant. Other major determinants of stress are “unclear objective”, “insecure job climate”, “excessive time pressure”, “friction”, “long working hours” and “life threat” found in the study. However, though the study is very new to Bangladesh perspective, it is expected that it may help to develop professional stress management policies in this sector.
Isolation and Identification of Fungal Endophytes from Grasses along the Oregon Coast  [PDF]
Ruth C. Martin, James E. Dombrowski
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.619313
Abstract: Fungal endophytes have been shown to improve abiotic and biotic stress response in plants. Grasses growing along the Oregon coast are exposed to harsh conditions and may harbor endophytes that enable them to survive and grow under these conditions. Endophytic fungi were isolated from thirty-four grass plants representing eight different grass species at four different locations along the Oregon coast. The ITS-1, 5.8S, and ITS-2 regions of each isolate were amplified, sequenced, and used to perform a BLAST search against the nucleotide database collection at National Center for Biotechnology Information. One-hundred-eleven different fungal isolates were classified into thirtynine genera with two isolates that did not show a match greater than 95%. These endophytes will be investigated to determine their potential for improving the adaptability of grasses and other crop plants to grow in diverse environments where they are subjected to multiple biotic and abiotic stresses.
Restraint-Induced Expression of Endoplasmic Reticulum Stress-Related Genes in the Mouse Brain  [PDF]
Mitsue Ishisaka, Takashi Kudo, Masamitsu Shimazawa, Kenichi Kakefuda, Atsushi Oyagi, Kana Hyakkoku, Kazuhiro Tsuruma, Hideaki Hara
Pharmacology & Pharmacy (PP) , 2011, DOI: 10.4236/pp.2011.21002
Abstract: Depression is a significant public health concern but its pathology remains unclear. Previously, increases in an endoplasmic reticulum (ER) stress-related protein were reported in the temporal cortex of subjects with major depressive disorder who had died by suicide. This finding suggests an association between depression and ER stress. The present study was designed to investigate whether acute stress could affect the ER stress response. Mice were immobilized for a period of 6 hr and then expression of ER stress response-related genes was measured by real-time PCR. We also used enzyme-linked immunosorbent assay for concomitant measurement of the plasma corticosterone levels in the mice. The effect of corticosterone on ER stress proteins was further investigated by treating mice with corticosterone for 2 weeks and then measuring ER protein expression by Western blotting. After a 6 hr restraint stress, mRNA levels of ER stress-related genes, such as the 78-kilodalton glucose regulated protein (GRP78), the 94-kilodalton glucose regulated protein (GRP94), and calreticulin, were increased in the cortex, hippocampus, and striatum of mouse brain. Blood plasma corticosterone level was also increased. In the corticosterone-treated mouse model, the expression of GRP78 and GRP94 was significantly increased in the hippocampus. These results suggest that acute stress may affect ER function and that ER stress may be involved in the pathogenesis of restraint stress, including the development of depression.
Association of Increased Levels of Happiness with Reduced Levels of Tension and Anxiety after Mental Stress Testing in Japanese College Students  [PDF]
Satoshi Horiuchi, Akira Tsuda, Natsuki Toyoshima, Shuntaro Aoki, Yuji Sakano
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.49097
Abstract:

Previous studies from western countries have reported that happy individuals report lower levels of negative mood during and/or following mental stress testing; this finding has not been examined in Japan. This study examined the relationship between happiness, measured using the Subjective Happiness Scale (Lyubomirsky & Lepper, 1999), and negative moods (i.e., tension and anxiety) during and after mental stress testing in Japanese college students. Based on the findings of previous literature and inverse correlations between positive and negative moods, we hypothesized that participants with higher levels of happiness (the higher happiness group, or HG) show significantly lower levels of negative moods and higher levels of positive moods following mental stress testing, compared to participants with lower levels of happiness (the lower happiness group, or LG). Of a total of 392 Japanese undergraduates who participated in a screening survey, those whose scores were one standard deviation higher or lower than the average score were invited to participate in the experiment. Eight HG and nine LG students agreed to participate. A five-minute computerized mental arithmetic task was used to induce stress. The session comprised a five minute pre-task period, a five minute task, and a five minute post-task period. The levels of positive and negative moods during each period were measured retrospectively following each period. Heart rate was measured during the session. Participant heart rate levels and negative moods increased significantly from the pre-task to the task periods, and subsequently decreased during the post-task period. Levels of positive mood decreased from the pre-task to the task period. Negative moods were significantly lower in HGs than in LGs during the post-task period. These results partially supported the hypothesis whereby subjective happiness buffered the impact of stressors on negative moods by influencing post-stress negative mood levels.

 

Estimation of the Yield Stress of Stainless Steel from the Vickers Hardness Taking Account of the Residual Stress  [PDF]
Osamu Takakuwa, Yusuke Kawaragi, Hitoshi Soyama
Journal of Surface Engineered Materials and Advanced Technology (JSEMAT) , 2013, DOI: 10.4236/jsemat.2013.34035
Abstract:

In this paper, a method that uses the Vickers hardness to estimate the yield stress of a metallic material with taking account of residual stress is proposed. Although the yield stress of bulk metal can be evaluated by a tensile test, it cannot be applied to local yield stress varied by surface modification methods, such as the peening technique which introduces high compressive residual stress at the surface. Therefore, to evaluate the local yield stress employing a relatively easy way, the Vickers hardness test was conducted in this paper. Since the Vickers hardness depends on both the residual stress and the yield stress, the relationship between the residual stress and the Vickers hardness was experimentally examined. It was concluded that the yield stress of the surface treated by several peening techniques can be estimated from the Vickers hardness once this has been corrected for residual stress.

Periodontal Emotional Stress Syndrome: Review of Basic Concepts, Mechanism and Management  [PDF]
Jyoti Bansal, Abhishek Bansal, Mohit Shahi, Suresh Kedige, Rachita Narula
Open Journal of Medical Psychology (OJMP) , 2014, DOI: 10.4236/ojmp.2014.33026
Abstract: Stress is an unavoidable consequence of life. It is described as adverse emotions or reactions to unpleasant experiences. Thus, stress can be viewed as a process with both psychological and physiological components. The possible mechanisms by which psychosocial factors act on periodontal tissues are oral hygiene negligence, changes in dietary intake, smoking, bruxism, gingival circulation, alteration in salivary component and flow, hormonal changes and lowered host resistance. During stress hypothalamic-pituitary-adrenal (HPA) axis and the sympathetic nervous system interact and release glucocorticoid which has myriad of effects that disrupt homeostasis and lead to increased susceptibility to periodontal diseases. The dental practioner, thus, may always decide to refer patients to appropriate professional for assistance and counselling. Therefore, reducing stress and improving coping strategies may improve the periodontal prognosis and treatment outcomes. The aim of this review is to provide an insight into the relationship between psychological stress and periodontal diseases.
Stress Management Based on Trait-Anxiety Levels and Sleep Quality in Middle-Aged Employees Confronted with Psychosocial Chronic Stress  [PDF]
Marion Trousselard, Dominique Steiler, Angelique Lebreton, Pascal Van Beers, Catherine Drogout, Josiane Denis, Mounir Chennaoui, Frédéric Canini
Psychology (PSYCH) , 2014, DOI: 10.4236/psych.2014.51013
Abstract:

A stress management program using cardiac coherence was implemented after an organizational downsizing. The study was conducted in nine voluntary workers in order to evaluate the efficiency of the program. A baseline evaluation was conducted on psychological variables (anxiety, perceived-stress, wellbeing and sleep), endocrine assessments (urinary cortisol excretion, alpha-amylase and salivary concentrations) and physiological recordings (sleep and heart rate variability). The low number of participants was due to the intrusive approach in collecting physiological and endocrine variables. The program consisted of ten sessions of cardiac coherence training during a 3-month follow-up period. At the end of the training sequence, subjects were once again exposed to the same evaluation battery. A decrease in perceived stress and a subsequent increase in well-being were observed. Sleep quality improved as suggested by the results of the subjective and objective measurements. For the entirety of the results, improvements were higher in subjects with high vs. low trait-anxiety scoring. The pattern of results for subjects prone to a high level of trait-anxiety suggested that stress and sleep are related to each other in a bidirectional way: increased anxiety is associated to poor sleep and stress reduction improves both anxiety and sleep. On the basis of these results, we suggest that trait-anxiety can be used as an indicator of which employees should be given priority for stress management intervention. We will also highlight the interest of operationally physiological recordings, used outside the laboratory, for measuring objective improvements due to this stress management intervention, as quality of sleep.

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