scholarly journals A Study on the Derivation Method of Damage Range to Determine Reaction in Trichlorosilane Leak Accidents

2021 ◽  
Vol 21 (1) ◽  
pp. 291-300
Author(s):  
Byeonghan Jeon ◽  
Hyunsub Kim
Keyword(s):  
Regression Analysis ◽  
Release Rate ◽  
Explanatory Power ◽  
Derivation Method ◽  
Damage Impact

In this study, we aimed to derive a formula for calculating the damage impact range using KORA, in the event of an accidental leakage of trichlorosilane (TCS), with simple information on the site to swiftly inform the decision to evacuate residents. TCS release rate, temperature, and dike height were selected as the variables, and an equation to calculate the damage impact range was derived through the regression analysis of the range using KORA. Based on the result it was seen that the damage range in the absence of dike has high correlation (p<0.05) in the order of TCS release rate and temperature, with an explanatory power of about 97%. The damage impact range in the presence of dike was found to have high correlation (p<0.05) to TCS release rate, dike height, and temperature, respectively, with an explanatory power of about 92~93%.

scholarly journals The Prognostic Significance of the Alterations of Cardiovascular Hemodynamics in Patients With Pulmonary Arterial Hypertension: A Meta-regression Analysis of Randomized Controlled Trials

2021 ◽  
Author(s):  
Shih-Hsien Sung ◽  
Wan-Yu Yeh ◽  
Chern-En Chiang ◽  
Chi-Jung Huang ◽  
Wei-Ming Huang ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Pulmonary Arterial Hypertension ◽  
Explanatory Power ◽  
Controlled Trials ◽  
Hemodynamic Changes ◽  
Randomized Controlled ◽  
Clinical Events ◽  
Pulmonary Arterial ◽  
Meta Regression ◽  
Meta Regression Analysis

Abstract Background: Hemodynamic assessment in patients with pulmonary arterial hypertension (PAH) is essential for risk stratification and pharmacological management. However, the prognostic value of the hemodynamic changes after treatment is less well established. Objectives: We investigated the prognostic impacts of the changes in hemodynamic indices, including mean pulmonary artery pressure (mPAP), pulmonary vascular resistance (PVR), right atrial pressure (RAP) and cardiac output index (CI). We conducted this systematic review with meta-regression analysis on existing clinical trials.Methods:We searched and identified all relevant randomized controlled trials from multiple databases. An analogous R2 index was used to quantify the proportion of variance explained by each predictor in the association with PAH patients’ prognosis. A total of 20 trials and 3,263 individuals were enrolled. Results:The changes in mPAP, PVR, RAP and CI were all significantly associated with the change in 6MWD (∆6MWD). The change in mPAP was with the highest explanatory power for ∆6MWD (R2 analog=0.739). Additionally, the changes in mPAP, PVR and CI were independently predictive of adverse clinical events. The change in mPAP had the highest explanatory power for the clinical events (R2 analog =0.911). Furthermore, the change in PVR was with the highest explanatory power for total mortality of PAH patients (R2 analog =0.594). Conclusion:Hemodynamic changes after treatment, including mPAP, PVR, CI and RAP, were significantly associated with adverse clinical events or mortality in treated PAH patients. It is recommended that further studies be conducted to evaluate the changes in hemodynamic indices to guide drug titration.Trial registration number: PROSPERO; No.: CRD42019125157; URL: https://www.crd.york.ac.uk/PROSPERO/ (Date of registration: 14/03/2019)

scholarly journals Factors associating with disability of non-specific low back pain in different subgroups: A hierarchical linear regression analysis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Takahiro Miki ◽  
Daisuke Higuchi ◽  
Tsuneo Takebayashi ◽  
Mina Samukawa
Keyword(s):  
Regression Analysis ◽  
Low Back Pain ◽  
Back Pain ◽  
Pain Intensity ◽  
Psychosocial Factors ◽  
Self Efficacy ◽  
Explanatory Power ◽  
Low Back ◽  
Acute Group ◽  
Pain Catastrophising

AbstractThis study aimed to explore factors associating with disability, which means physical impairment affecting a person’s mobility, capacity, stamina, or agility, of non-specific low back pain (NSLBP) of the acute and non-acute groups. Two hundred thirty-five patients with NSLBP of less than 8 weeks’ duration as acute groups (n = 124) and more than 8 weeks’ duration as non-acute group (n = 111) were recruited. It was collected data on pain intensity, disability and psychosocial factors, including pain catastrophising, fear of movement and pain self-efficacy. Disability was measured Roland Morris Disability Questionnaire. A hierarchical multiple regression analysis was performed to analyse factors associating with disability of the acute and non-acute groups. The Result was that explanatory power increased with each additional variable of the order of demographic characteristics, pain intensity and psychosocial factors for both groups. Pain intensity, pain catastrophising and pain self-efficacy had significant explanatory power, with pain self-efficacy having the most significant association on the acute group. Only pain self-efficacy having the most significant association on disability of the non-acute group. In conclusion, the factors associating with disability differed depending on the duration of the disease, and pain self-efficacy might be one of the factors associating with disability of patients with NSLBP.

scholarly journals Moderating Effect of Mindfulness on the Influence of Stress on Depression According to the Level of Stress among University Students in South Korea

2020 ◽  
Vol 17 (18) ◽  
pp. 6634
Author(s):  
Kwang-Hi Park ◽  
Hyunlye Kim ◽  
Jaehee Kim
Keyword(s):  
Regression Analysis ◽  
University Students ◽  
South Korea ◽  
Multiple Regression Analysis ◽  
Multiple Regression ◽  
Life Stress ◽  
Mental Health Problems ◽  
Explanatory Power ◽  
Moderating Effect ◽  
The Impact

Stress and depression are representative of the mental health problems of university students worldwide. This cross-sectional study explored the moderating effect of mindfulness on the influence of stress on depression according to the degree of life stress. The participants were 738 university students in years 2–4 in five 4-year universities in South Korea. Depression was positively correlated with stress and negatively with mindfulness at a statistically significant level. In multiple regression analysis, stress was found to have an effect by increasing depression, and mindfulness by relieving depression. In the moderated multiple regression analysis, mindfulness had a moderating effect on the impact of stress on depression only in low-stress groups, showing that the interaction of stress with mindfulness was significantly negative (β = −0.11, t = −2.52, p = 0.012) and the inclusion of this interaction significantly increased the explanatory power for depression variation (F change 6.36, p = 0.012) in the full model. In conclusion, we suggest considering stress levels in the development of mindfulness-based intervention strategies to effectively manage the depression of university students.

scholarly journals The prognostic significance of the alterations of pulmonary hemodynamics in patients with pulmonary arterial hypertension: a meta-regression analysis of randomized controlled trials

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Shih-Hsien Sung ◽  
Wan-Yu Yeh ◽  
Chern-En Chiang ◽  
Chi-Jung Huang ◽  
Wei-Ming Huang ◽  
...  
Keyword(s):  
Systematic Review ◽  
Regression Analysis ◽  
Explanatory Power ◽  
Controlled Trials ◽  
Hemodynamic Changes ◽  
Randomized Controlled ◽  
Clinical Events ◽  
Pulmonary Arterial ◽  
Meta Regression ◽  
Meta Regression Analysis

Abstract Background Hemodynamic assessment in patients with pulmonary arterial hypertension (PAH) is essential for risk stratification and pharmacological management. However, the prognostic value of the hemodynamic changes after treatment is less well established. Objectives We investigated the prognostic impacts of the changes in hemodynamic indices, including mean pulmonary artery pressure (mPAP), pulmonary vascular resistance (PVR), right atrial pressure (RAP), and cardiac output index (CI). We conducted this systematic review with meta-regression analysis on existing clinical trials. Methods We searched and identified all relevant randomized controlled trials from multiple databases. An analogous R2 index was used to quantify the proportion of variance explained by each predictor in the association with PAH patients’ prognosis. A total of 21 trials and 3306 individuals were enrolled. Results The changes in mPAP, PVR, RAP, and CI were all significantly associated with the change in 6MWD (∆6MWD). The change in mPAP was with the highest explanatory power for ∆6MWD (R2 analog = 0.740). Additionally, the changes in mPAP, PVR, and CI were independently predictive of adverse clinical events. The change in mPAP had the highest explanatory power for the clinical events (R2 analog = 0.911). Furthermore, the change in PVR was with the highest explanatory power for total mortality of PAH patients (R2 analog = 0.612). Conclusion Hemodynamic changes after treatment, including mPAP, PVR, CI, and RAP, were significantly associated with adverse clinical events or mortality in treated PAH patients. It is recommended that further studies be conducted to evaluate the changes in hemodynamic indices to guide drug titration. Systematic review registration PROSPERO CRD42019125157

scholarly journals Gratitude and Forgiveness as Predictors of Subjective Well-Being Among Young Adults in Pakistan

2020 ◽  
Vol 35 (4) ◽  
pp. 725-738
Author(s):  
Hudaa Hermaen ◽  
Zainab Hussain Bhutto
Keyword(s):  
Young Adults ◽  
Regression Analysis ◽  
Linear Regression Analysis ◽  
Explanatory Power ◽  
Well Being ◽  
Multiple Linear Regression Analysis ◽  
Extensive Study ◽  
Subjective Well Being ◽  
Positive Relation ◽  
The Impact

The present study was aimed to explore the impact of gratitude and forgiveness in predicting subjective well-being in young adults. The sample for the study included 300 participants between the ages of 18 and 24 years who were conveniently selected from a university in Karachi city. Gratitude Questionnaire (McCullough et al., 2002), Heartland Forgiveness Scale (Thompson et al., 2005) and Flourishing Scale (Diener et al., 2010) were used as the measures to collect data. Multiple linear regression analysis revealed gratitude to be nonsignificant predictor of subjective well-being, whereas, forgiveness was found to be a significant predictor of subjective well-being . Further, weak positive relation of gratitude with subjective well-being (r = .14), and forgiveness with subjective well-being (r = .34) has been found. However, the explanatory power of this model was revealed to be significant (R2 = .12), suggesting that the variables share an important association which needs further extensive study. This study implies that forgiveness and gratitude may be effectively used in psychotherapy and substantially integrated in general counselling for young adult clients.

scholarly journals Factors Affecting Disability With Nonspecific Low Back Pain in Different Subgroups: A Hierarchical Linear Regression Analysis

2021 ◽  
Author(s):  
Takahiro Miki ◽  
Daisuke Higuchi ◽  
Tsuneo Takebayashi ◽  
Mina Samukawa
Keyword(s):  
Regression Analysis ◽  
Pain Intensity ◽  
Psychosocial Factors ◽  
Explanatory Power ◽  
Demographic Characteristics ◽  
Low Back ◽  
Factors Affecting ◽  
Additional Variable ◽  
Chronic Group ◽  
Acute Group

Abstract Purpose: To systematically explore how disability is influenced with layers　(demographic level, pain level and psychosocial factors) in nonspecific low back pain (NSLBP) in different subgroups.Methods: This is a cross-sectional study that compared two different subgroups in NSLBP at two hospitals. Hierarchical multiple regression analysis was performed to analyse factors affecting disability in different groups (overall group, acute group and subacute/chronic group).Results: In the overall group (n = 235), explanatory power increased with each additional variable in the order of demographic characteristics, pain intensity and psychosocial factors. Pain intensity (ß = 0.219), Pain Catastrophising Scale (PCS) (ß = 0.175) and Pain Self-Efficiency Questionnaire (PSEQ) (ß = −0.370) were significantly associated with disability. In the acute group (n = 65), explanatory power improved with each additional variable for the disability in the order of demographic characteristics, pain intensity and psychosocial factors. Ultimately, pain intensity and PSEQ had significant explanatory power, with pain having the most influence. However, in the subacute/chronic group (n = 170), explanatory power increased with each additional variable in the order of demographic characteristics, pain intensity and psychosocial factors and all, including psychosocial factors, had a strong impact, with self-efficacy having the most substantial impact on disability.Conclusion: Depending on the duration of the disease, the factors affecting the disability differed, with pain having more influence than psychosocial factors in the acute phase and psychosocial factors having more influence in the chronic phase.

scholarly journals An Analysis of the Sustainable Development of Environmental Education Provided by Museums

2018 ◽  
Vol 10 (11) ◽  
pp. 4054 ◽  
Author(s):  
Yun-Ciao Wang ◽  
Shang-Chia Chiou
Keyword(s):  
Sustainable Development ◽  
Regression Analysis ◽  
Environmental Education ◽  
Development Strategy ◽  
Informal Education ◽  
Explanatory Power ◽  
Cross Cultural ◽  
Cultural Learning ◽  
Main Function ◽  
Educational Settings

Under the international initiative of environmental education and ecological conservation, promoting the public’s environmental awareness is the mission and goal of the museum’s environmental education. The main function of the museum is to integrate the values of local, regional, and national culture toward multifaceted management, as the museum is an important cultural carrier and a key force for informal education. Past studies have focused on environmental protection in formal educational settings, while museums in nonformal educational settings have undertaken relatively few missions to the environment, which is the motivation of this study. In the past three hundred years, nine countries, including world powers like Spain, the Netherlands, the United Kingdom, and Japan, have left their footprints in Tamsui, Taiwan, creating an important field for cross-cultural environmental education. Therefore, this study takes environmental education in the protection of Taiwan’s Tamsui cultural assets as its case study, and uses gradual regression analysis as a method to explore the potential factors of audience cognition resulting from the channels of museum environmental education, and to grasp the possibility of implementation. The results show that the reliability coefficient of this study is 0.908, and the internal consistency of the representative scale is high. The overall satisfaction with environmental education of audiences is above 4.24 in the five-level subscale. Further gradual regression analysis shows that positive and negative explanatory power can be used to examine the environmental education programs of museums. Therefore, according to data analysis, the findings can serve as a basis for promoting social environmental education goals, as well as a field for cross-cultural learning, to achieve a people-oriented sustainable development strategy.

scholarly journals Factors Associated with Pressure to Eat as a Feeding Practice among Mothers with Infants

2020 ◽  
Vol 26 (2) ◽  
pp. 277-285
Author(s):  
Jin Suk Ra ◽  
Yeon-Hee Jeong ◽  
Soon Ok Kim
Keyword(s):  
Body Mass Index ◽  
Regression Analysis ◽  
Explanatory Power ◽  
Educational Interventions ◽  
Educational Programs ◽  
Feeding Practice ◽  
Correct Evaluation ◽  
Cross Sectional ◽  
Factors Associated ◽  
Cross Sectional Design

Purpose: This study aimed to identify factors-both infant-related and maternal-associated with pressure to eat as a feeding practice among mothers with infants. Methods: This study used a cross-sectional design and included 163 mothers of infants aged 2~12 months. Of the 180 self-reported questionnaires that were distributed, 163 (91%) were included in the data analysis. Multiple regression analysis was used to identify the factors associated with pressure to eat as a feeding practice among the mothers.Results: Infant’s temperament (β=-.17, <i>p</i>=.035), mother’s body mass index (β=-.16, <i>p</i>=.048), and concern about the infant being underweight (β=.30, <i>p</i>=.001) were associated with pressure to eat as a feeding practice among mothers. The explanatory power of these variables in the predictive model was 19.2%. Conclusion: Educational programs should be developed for improving mother’s awareness of cues from infants with difficult temperament. In addition, educational interventions regarding the correct evaluation of infant’s weight are needed to relieve mother’s concern about their infant’s being underweight. These interventions might be helpful to reduce the prevalence of pressure to eat as a feeding practice among mothers with infants.

The Relationships Among Adult Affective Factors, Engagement in Science, and Scientific Competencies

2016 ◽  
Vol 67 (1) ◽  
pp. 30-47 ◽  
Author(s):  
Chun-Yen Tsai ◽  
Yuh-Yuh Li ◽  
Ying-Yao Cheng
Keyword(s):  
Regression Analysis ◽  
Demographic Variable ◽  
Explanatory Power ◽  
Hierarchical Regression ◽  
Face To Face ◽  
Affective Factors ◽  
Interest In Science ◽  
Self Confidence ◽  
The Relationship ◽  
Scientific Competencies

This study investigated the relationship among adult affective factors, engagement in science, and scientific competencies. Probability proportional to size sampling was used to select 504 participants between the ages of 18 and 70 years. Data were collected through individual face-to-face interviews. The results of hierarchical regression analysis showed that while controlling demographic variable factors, science-related affective factors held explanatory power for scientific competencies. Among those factors, the explanatory power of self-efficacy was the greatest, followed by enjoyment and interest in science. While controlling antecedent factors, engagement in science held explanatory power for scientific competencies. It is suggested that improving affective factors and engagement in science may enhance adult scientific competencies. In terms of adult education, this study suggests that with more accessible science resources, adults may have the potential to trigger their interest, increase their self-confidence, and engage themselves in scientific issues.

The Politics of Redistribution: A Reformulation

1973 ◽  
Vol 67 (3) ◽  
pp. 924-933 ◽  
Author(s):  
Bernard H. Booms ◽  
James R. Halldorson
Keyword(s):  
Public Policy ◽  
Regression Analysis ◽  
Explanatory Power ◽  
Explanatory Model ◽  
Socioeconomic Variables ◽  
Potential Value ◽  
State Revenue ◽  
The Impact ◽  
Political Variables

This paper offers a critique and a reformulation of Brian Fry and Richard Winters's policy output study published in this Review June, 1970. Fry and Winters focused on the redistributive impact of public policy in the states. After devising a “redistribution ratio” that involves allocating state revenue burdens and expenditure benefits to families across income classes, they developed a model to explain the variance of this ratio from state to state. In contrast to the findings of many earlier policy output studies, they hypothesized that political variables would have more explanatory power than socioeconomic variables.Unfortunately some methodological shortcomings detract from the potential value of the Fry and Winters study. In this paper, alternative methodologies are used to reformulate a redistribution ratio for each state, and the recalculated ratios are found to vary significantly from those obtained by Fry and Winters.The shortcomings of the Fry and Winters explanatory model are discussed. Despite these shortcomings, however, the regression analysis employed by Fry and Winters is repeated using the reformulated redistribution ratios in order to test the impact of this reformulation. Again the results obtained in this paper vary substantially from those of Fry and Winters.

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