Atlantis: a time‐value model in e‐commerce

This paper presents a model for resolving two main issues of time in e‐commerce. The first issue is the time value of e‐commerce that represents the value of each moment of the commerce time from the perspective of buyers and sellers. Buyers and sellers can use this model to calculate the time value at each moment of time and accordingly decide whether it is profitable to buy or sell at that moment. The second issue is to allow buyers or sellers to increase their savings or decrease their costs by changing each of the factors governing the time value model of the concerned e‐commerce. We present relevant model specifically for Amazon e‐commerce to present a proof of concept of our proposed models.     

Grain orientation effects on delamination during fatigue of a sensitized Al–Mg alloy

Fatigue crack growth experiments were conducted in humid air (RH~45%) at 25 °C on 29-mm-thick plate samples of an aluminium–magnesium (Al–Mg) 5083-H131 alloy in the long transverse (LT) direction. Samples were tested in both the as-received condition and after sensitization at 175 °C for 100 h. Delamination along some grain boundaries was observed in the short transverse plane after fatigue testing of the sensitized material, depending upon the level of ΔK and K_max. Orientation microscopy using electron backscattering diffraction and chemical analyses using transmission electron microscopy and energy dispersive spectroscopy of grain boundaries revealed that Mg segregation and the orientation of grains had key roles in the observed grain boundary delamination of the sensitized material.     

Investigation of the Contribution of Spirituality and Religiousness to Hedonic and Eudaimonic Well-Being in Iranian Young Adults

Studies that have used both spirituality and religiousness measures to predict mental well-being are virtually nonexistent. Furthermore, in almost all of the past studies, the distinction between hedonic and eudaimonic aspects of well-being has not been taken into account. To address these limitations, the present study sought to examine the relation between spirituality and religiousness and a rather comprehensive set of well-being scales in an Iranian Muslim sample. Participants were 292 undergraduates at the University of Tehran. Results of bivariate correlation analysis showed that all aspects of hedonic and eudaimonic well-being were positively correlated with all aspects of spirituality and religiousness. Results of the multiple regression analysis demonstrated that spirituality was a stronger predictor of well-being than religiousness. In order to further examine the unique contribution of spirituality and religiousness over each other and gender, hierarchical regression analysis was applied. Findings indicated that while spirituality was a significant predictor of well-being after partialling out the effects of gender and religiousness, religiousness did not add significantly to the prediction of well-being over and above the contribution of gender and spirituality. Implications of the results are discussed, as are study limitations and directions for further research.     

Effects of Developmental Task Constraints on Kinematic Synergies during Catching in Children with Developmental Delays

Abstract

The aim of this study was to examine effects of a task intervention on kinematic synergies in catching. Participants were young children (5.58?±?0.52?years) with the lowest scores on two-hand catching, according to assessments with the Test of Gross Motor Development-2 (TGMD-2) and were allocated into two groups. The constraints group took part in an 8-week intervention, whereas the control group experienced a typical physical education. Both groups were assessed with motor development and kinematic coordination measures with a catching task with a ball thrown from 2?m distance. Kinematic variables were recorded using a wireless motion capture system. A principal component analysis (PCA) was used to measure the kinematic synergies formed among active body parts. Two synergies that emerged in catching were mainly utilised for “reaching” and “catching” the ball. The control group tended to re-organise the majority of active body parts into two functional units in all phases, whereas the constraints group adapted their active parts into functional units according to the requirement of the novel movement in the transfer task. The findings of this study suggested that task constraints could facilitate object control by re-organisation of active body parts into functional synergies to achieve successful performance.     

The Association Between Anhedonia,Suicide Ideation,and Suicide Attempts: A Replication in a Persian Student Sample

Research suggests that anhedonia, a common symptom of depression, may be uniquely associated with suicidal behavior. However, little research has examined this association across cultures. To address this limitation, this study attempted to replicate a recent anhedonia and suicide study (conducted in a western culture) in a Persian sample using the Specific Loss of Interest and Pleasure Scale, Persian version. Participants consisted of 404 students who were recruited from a Persian university. Surprisingly, our results indicated that anhedonia levels were more than double those found in similar American student sample. Despite this marked difference in anhedonia symptoms, we found that anhedonia was associated with suicide risk, even when it was statistically accounting for other depressive symptoms. These findings suggest that anhedonia is a robust predictor of suicide risk across these two cultures. Further, anhedonia may be a particularly important treatment target among Persian students.     

The Combined Influence of Monitoring and Early Puberty on Disruptive Behavior Problems in African American Girls

Journal of Child and Family Studies - Adolescent girls’ disruptive behavior problems (DBP) are associated with risk for other mental health challenges and legal system involvement. Existing...     

Satisfaction with Life Declines with Age in Malaysia: an Exploratory Analysis of Factors Influencing Subjective Well-Being in a Developing/Middle-Income Country

Applied Research in Quality of Life -