scholarly journals Springback Prediction of a Hot Stamping Component Based on the Area Fractions of Phases

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 694 ◽  
Author(s):  
Xiangji Li ◽  
Xu Yan ◽  
Zhiqiang Zhang
Keyword(s):  
Linear Regression ◽  
Hot Stamping ◽  
Regression Analyses ◽  
Analysis Model ◽  
Shape Accuracy ◽  
Cold Zone ◽  
Springback Prediction ◽  
The Relationship ◽  
Springback Angle ◽  
Hot Zone

Different from traditional hot stamping components with full martensite, the new tailored hot stamping (THS) components have different quenched microstructures, which results in their lower shape accuracy. To investigate the influence of different quenched phases on the springback of a component, a THS experiment of a U-shaped component was performed with segmented heating and a cooling tool. The area fractions of phases at different tool temperatures were obtained by a two-stage color tint etching procedure. Results showed that the quenched phase of the cold zone was almost full martensite. The area fraction of martensite in the hot zone was reduced to the lowest 13% at the tool temperature of 600 °C, while the bainite content reached the highest at 70%. The springback angles at different tool temperatures for quenching were measured by 3D scanning technology and the reverse modeling method. It was revealed that the springback angle increased with the increase of martensite and yet decreased with the increase of bainite. The relationship between the springback angle and the area fractions of the quenched phases was established by means of multiple linear regression analyses. The error analysis results of the predictions and measurements showed that the springback analysis model, based on the area fractions of quenched phases, could be used to predict the springback of hot stamping components with tailored properties.

Resilience in Very Advanced Ages: A Study With Centenarians

2020 ◽  
pp. 009141502092683
Author(s):  
Ana Saraiva Amaral ◽  
Rosa Marina Afonso ◽  
Daniela Brandão ◽  
Laetitia Teixeira ◽  
Oscar Ribeiro
Keyword(s):  
Health Status ◽  
Linear Regression ◽  
Life Events ◽  
Health Perception ◽  
Regression Analyses ◽  
Sociodemographic Variables ◽  
Significant Life ◽  
And Control ◽  
The Relationship

This study intends to assess the relationship between resilience in extremely long-lived individuals and sociodemographic, cognitive and health status variables, and significant life events. A selected sample of 48 centenarians (mean age = 100.8 years, SD = 1.2; 83.3% female) from two centenarian studies was considered. A resilience score covering five items (aging and usefulness, hopefulness, worryness, loneliness, and control) was considered. Multivariable linear regression analyses were conducted in order to identify predictors of resilience. No significant differences in the resilience score regarding sociodemographic variables or typology of significant life events were found. Our findings underscore that health perception (better) and pain (less frequent) were associated with higher levels of resilience. In being present in extremely long-lived individuals, resilience should be object of interest in further research.

The Drug–Crime Connection in Adolescent and Adult Respondents

2016 ◽  
Vol 47 (2) ◽  
pp. 205-216 ◽  
Author(s):  
Glenn D. Walters
Keyword(s):  
Drug Use ◽  
Linear Regression ◽  
Early Adulthood ◽  
Multivariate Linear Regression ◽  
Regression Analyses ◽  
Criminal Offending ◽  
England And Wales ◽  
Drug Crime ◽  
The Relationship ◽  
Practical Implications

The aim of this study was to determine whether the nature of the drug–crime relationship differs as a function of participant age (adolescent vs. adult). It was hypothesized that the Drug × Crime interaction would predict subsequent drug use and serious offending in 924 early- to mid-adolescents but not in 722 adults. All participants came from the Offending, Crime, and Justice Survey conducted in England and Wales between 2003 and 2006. The hypothesis was supported by the results of two separate two-equation multivariate linear regression analyses. These findings indicate that the relationship between drug use and criminal offending varies as a function of participant age, such that the relationship is interactive during its formative years but becomes cumulative or additive during early adulthood. The research, theoretical, and practical implications of these results are discussed.

Examining the Relationship Between Attitudes Toward Suicide and Suicide Attempt History

Crisis ◽  
2019 ◽  
Vol 40 (4) ◽  
pp. 265-272
Author(s):  
Melanie A. Hom ◽  
Ian H. Stanley ◽  
Mary E. Duffy ◽  
Lisa Davis ◽  
Thomas E. Joiner
Keyword(s):  
Linear Regression ◽  
Suicide Attempt ◽  
Perceived Risk ◽  
Self Report ◽  
Suicidal Behaviors ◽  
Regression Analyses ◽  
Cross Sectional ◽  
Stigmatizing Attitudes ◽  
Attitudes Toward Suicide ◽  
The Relationship

Abstract. Background: Relatively little is known regarding the relationship between attitudes toward suicide, suicide attempt (SA) history, and future suicidal behaviors. Aims: Utilizing a sample of firefighters, this study compared attitudes toward suicide between individuals with/without a career SA history and evaluated whether certain attitudes toward suicide are associated with a greater self-reported likelihood of making a future SA. Method: US firefighters ( N = 818) completed self-report measures. One-way ANOVAs and linear regression analyses were utilized to address study aims. Results: Firefighters with a career SA reported significantly greater normalization/glorification of suicide – yet lower attributions of suicide to isolation/depression – than those without this history. More stigmatizing attitudes toward suicide and greater normalization/glorification of suicide were each significantly associated with greater self-reported future SA likelihood. Limitations: Data were cross-sectional and findings may not be generalizable. Conclusion: Firefighters who have made an SA during their firefighting careers may normalize and glorify suicide more than those who have not. These attitudes may be associated with greater self-perceived risk for future SAs. Research is needed to replicate findings and evaluate strategies for targeting potentially harmful beliefs about suicide among SA survivors.

scholarly journals The Relationship between Cognition, Personality and Feeling, with Customer Purchase Intention in E-Commerce Marketing

2015 ◽  
Vol 6 (1) ◽  
pp. 88
Author(s):  
Somayeh Baadab Barzegar ◽  
Mohammad Reza Hoshyar Sadeghian ◽  
Roghayeh Hassanzadeh
Keyword(s):  
Linear Regression ◽  
Purchase Intention ◽  
Pearson Correlation ◽  
Analysis Model ◽  
Personality Variables ◽  
The Past ◽  
Pearson Correlation Test ◽  
Online Stores ◽  
The Relationship ◽  
Path Analysis Model

<p>E-commerce, has distinguished today's world from the past strictly, But the organizations with knowing its usage can apply it very well. The purpose of this study is investigation of the effect of the cognition, feelings and personality variables on customer purchase intention from online stores in e-commerce. To test the hypothesis of research, Pearson correlation test, linear regression and path analysis model were used. The results of this research has showed that online stores’ managers, according to personality, emotional and cognitive traits of customers, will allocate a larger share of virtual market of e-commerce to themselves.</p>

scholarly journals The relationships between gross motor coordination and sport-specific skills in adolescent non-athletes

2017 ◽  
Vol 18 (4) ◽  
Author(s):  
Daniel V Chagas ◽  
John Ozmun ◽  
Luiz Alberto Batista
Keyword(s):  
Linear Regression ◽  
Motor Performance ◽  
Motor Coordination ◽  
Linear Regression Analysis ◽  
Sports Performance ◽  
Regression Analyses ◽  
Young Athletes ◽  
Gross Motor ◽  
Practical Applications ◽  
The Relationship

AbstractPurpose. While the usefulness of gross motor coordination score as predictor of sports performance in young athletes has been demonstrated, practical applications in the settings where the focus is not on elite performance is limited. Further, little is known about the extent to which gross motor coordination score is associated with sport-specific skills among adolescent nonathletes. The aim of this study was to analyse the relationship between the degree of gross motor coordination and execution in specific volleyball tests among adolescent non-athletes. Methods. The total of 34 students (27 females and 7 males) aged 13-14 years who regularly participated in volleyball during physical education classes were randomly recruited. Gross motor coordination was assessed with the Körperkoordinationstest für Kinder. Motor performance on volley-specific skills was indicated by two product-oriented tasks: volleyball under service and service reception. Correlation and linear regression analyses were applied to examine the associations between motor coordination scores and motor performance in volley-specific skills. Results. Motor coordination score was positively correlated with motor performance on specific skills (r = 0.503, p = 0.02). Linear regression analysis revealed that motor coordination score accounted for 23% of the variance in the motor performance on volleyball skills (R

scholarly journals PENGARUH STRUKTUR MODAL, UKURAN PERUSAHAAN, RISIKO BISNIS TERHADAP NILAI PERUSAHAAN SEKTOR KIMIA YANG DI INDONESIA

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Chani Dinayu ◽  
Devi ana Sinaga ◽  
D. Sakuntala
Keyword(s):  
Linear Regression ◽  
Capital Structure ◽  
Firm Value ◽  
Stock Exchange ◽  
Company Size ◽  
Business Risk ◽  
Analysis Model ◽  
Company Value ◽  
Relationship Of ◽  
The Relationship

This study aims to determine the financial ratios represented by capital structure (DER), company size (ln total assets), business risk (DOL) to firm value. Data collection techniques using purposive sampling and obtained as many as 17 sample companies from 73 populations of chemical sub-sector companies listed on the Indonesia Stock Exchange (IDX) for the 2014-2018 period. The analysis model uses multiple linear regression. Based on the results of the coefficient test, the R square value of 0.749 shows that the correlation or closeness of the relationship of capital structure, company size, business risk and company value is only 74.9%. Adjusted R Square value of 0.735 indicates that the variable capital structure, company size, and business risk explains the variable to the company value of 73.5%. In the F test shows that the value of Fcount> Ftable (53,644> 2.78) so that simultaneously DER, ln total assets, DOL affect the value of the company in the chemical sub-sector of 2014-2018. Whereas the T-test for Company Size is 0.00, which means it has a partial effect on Company Value. Based on these results it is recommended for investors to pay more attention to the value of DER, ln total assets, DOL before investing.

Time to flowering in narrow-leafed lupin

1995 ◽  
Vol 46 (5) ◽  
pp. 1063 ◽  
Author(s):  
MA Reader ◽  
M Dracup ◽  
EJM Kirby
Keyword(s):  
Linear Regression ◽  
Multiple Linear Regression ◽  
Flowering Time ◽  
Regression Analyses ◽  
Average Temperature ◽  
Interaction Term ◽  
Using Data ◽  
Leaf Appearance ◽  
The Relationship ◽  
Rate Of Leaf Appearance

The relationship between flowering time and daylength and temperature is described for L. angustifolius using multiple linear regression. The main cultivar was Gungurru but cvv. Danja, Yorrel and the L. albus cv. Kiev Mutant were also studied. Regression analyses were performed on time to flowering observations for lupins grown with serial sowings at up to 12 sites over up to 5 years in Western Australia (there were 102 separate observations of time to flowering for Gungurru). Time to flowering in the L. angustifolius cultivars was best explained by a model incorporating terms for average temperature and daylength between sowing and flowering. Models of this form were not satisfactory for L. albus, probably because of vernalization requirements which the L. angustifolius cultivars do not have. Using data from the experiment with the widest range of sowings, 94.6% of the variation in time to flowering was explained by the above model and an additional 3.5% was explained by including an interaction term. The rate of progress through all stages of development to flowering, except for the period between appearance of the last leaf and flowering, was sensitive to temperature. The rate of leaf appearance responded to both temperature and daylength and the rate of progress through the period between appearance of the last leaf and flowering was sensitive only to daylength.

scholarly journals Factors Influencing the Intention of Perinatal Nurses to Adopt the Baby-Friendly Hospital Initiative in Southeastern Quebec, Canada: Implications for Practice

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Guylaine Chabot ◽  
Marie Lacombe
Keyword(s):  
Discriminant Analysis ◽  
Linear Regression ◽  
Nursing Practice ◽  
Baby Friendly Hospital Initiative ◽  
Regression Analyses ◽  
Independent Variables ◽  
Intention To Adopt ◽  
Factors Influencing ◽  
Effective Interventions ◽  
The Relationship

Nurses play a major role in promoting the baby-friendly hospital initiative (BFHI), yet the adoption of this initiative by nurses remains a challenge in many countries, despite evidences of its positive impacts on breastfeeding outcomes. The aim of this study was to identify the factors influencing perinatal nurses to adopt the BFHI in their practice.Methods. A sample of 159 perinatal nurses from six hospital-based maternity centers completed a survey based on the theory of planned behavior. Hierarchical multiple linear regression analyses were performed to assess the relationship between key independent variables and nurses’ intention to adopt the BFHI in their practice. A discriminant analysis of nurses’ beliefs helped identify the targets of actions to foster the adoption the BFHI among nurses.Results. The participants are mainly influenced by factors pertaining to their perceived capacity to overcome the strict criteria of the BFHI, the mothers’ approval of a nursing practice based on the BFHI, and the antenatal preparation of the mothers.Conclusions. This study provides theory-based evidence for the development of effective interventions aimed at promoting the adoption of the BFHI in nurses’ practice.

scholarly journals Does Cognitive Status Moderate the Relationship between Environmental Factors and Self-Reported Health?

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 717-717
Author(s):  
Ethan Siu Leung Cheung ◽  
Ada Mui
Keyword(s):  
Older Adults ◽  
Environmental Factors ◽  
Linear Regression ◽  
Cognitive Status ◽  
Regression Analyses ◽  
Neighborhood Social Cohesion ◽  
Reported Health ◽  
The Relationship ◽  
Normal Cognition

Abstract Using data from NHATS Round 9, the present study examines the relationships between environmental factors and self-reported health among older adults with dementia, mild cognitive impairment (MCI), and normal cognition. Based on neighborhood stress process theory, we investigate the following questions: 1) Are there associations between dwelling safety hazards and neighborhood environments and self-reported health? 2) Is cognitive status a moderator between the relationship? 3) How do these associations differ between older adults with varying cognitive status (i.e., dementia, MCI, and normal cognition)? A hierarchical linear regression analyses are conducted. Results indicate that better quality of sidewalk surface and neighborhood social cohesion are associated with better self-reported health, after taking into account sociodemographic, health, and social factors. Interaction terms are then used to examine the moderating effects of cognitive status on the associations; four interactions terms are found to be statistically significant. Lastly, separate linear regression analyses are implemented for the dementia, MCI, and normal cognition groups. Findings show that the predicting power of environmental factors vary by cognitive status of older adults. For individuals with dementia, tripping hazards, cluttered home, and community disconnectedness are associated with poor self-reported health. However, no significant relationship was found for older adults with MCI. For older adults with normal cognition, better quality of sidewalk surface and neighborhood social cohesion predict better self-rated health scores. Findings of this study illuminate the important role of a hazard-free home, community walkability, and socially cohesive neighborhood environments in predicting better health status of older adults.

scholarly journals Bullying and depression: the moderating effect of social support, rejection and victimization profile

2018 ◽  
Vol 35 (1) ◽  
pp. 1-10
Author(s):  
Ascensión Palomares Ruiz ◽  
Arantxa Oteiza-Nascimento ◽  
Mª Paz Toldos ◽  
Isabel Serrano-Marugán ◽  
Javier Martín-Babarro
Keyword(s):  
Social Support ◽  
Linear Regression ◽  
Peer Relationships ◽  
Peer Rejection ◽  
School Bullying ◽  
Influential Factors ◽  
Moderating Effect ◽  
Regression Analyses ◽  
Relationship Of ◽  
The Relationship

Peer relationships can be shaped as influential factors in the prevalence of bullying episodes. This research aims to analyze the effect of school bullying on the levels of depression of the victims and to what extent it is affected by social support and status in the group and by the profile of victimization. Several hierarchical linear regression analyses were calculated, in a sample of 1063 students aged 10 to 14 (47.8% of girls, M = 11.59 years, SD = 1.21 years), from 10 school of the Region of Madrid. The degree of influence of the studied variables was observed: lack of social support, peer rejection, withdrawal and impulsivity behaviors, and the relationship of all of them with victimization and depression. Findings revealed the influence of the lack of social support on the depression of victimized students. However, peer rejection did not show influence on the levels of depression of the victims. In addition, victimization associated with internalizing characteristics showed a greater association with depression than victimization associated with an externalizing profile.

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