The Lie algebra of infinitesimal symmetries of nonlinear diffusion equations

By using developed software for solving overdetermined systems of partial differential equations, the authors establish the complete Lie algebra of infinitesimal symmetries of nonlinear diffusion equations

Racism in Singapore: a review and recommendations for future research

Racism refers to ‘the differential treatment enacted by an individual, group, or organization on individuals based on assumptions of a group's phenotypic, linguistic, or cultural differences’ (Gamst, Liang, & Der-Karabetian, 2011, p. 251). Currently, there is a lack of psychological research investigating racism in Singapore. The available research, narrative reviews, qualitative studies, and quantitative studies have yielded limited and inconclusive results. These researches are critically evaluated to provide four recommendations for a psychological research agenda: (a) develop a reliable and valid instrument to assess racism, (b) conduct experimental research to examine racism perpetuated by the majority or institutions, (c) examine the negative effects of racism, and (d) develop and evaluate interventions for racism

Assessing Customer Evaluation and Revenue Consequences of Component Sharing Across Brands in the Vertical Product Line

Component sharing may look great in the boardroom, but not in the showroom. Indeed, savings on R&D and production costs could be offset by a plunge in customer brand attractiveness and willingness to pay. This paper investigates the impact of component sharing on customer evaluation of luxury, volume and economy brands offered in a car manufacturer’s vertical product line and its subsequent revenue consequences. The authors consider both the harm to the higher-end brand and the benefits for the lower end brand, and analyze with a random effects model how the size of these effects depends on the brand combination, the type of component, the source of the components sharing, and customer characteristics. An experimental study shows that the harm for the higher-end brand is largest, when (1) a luxury brand shares components with a volume brand, (2) the source of the components is the higherend brand, and when (3) the customer has a high initial evaluation of the higher-end brand. For the lower-end brand, the positive effect is largest, when (1) a volume brand shares with an economy brand, (2) the lower-end brand is the source of the components, and (3) customers have a high initial evaluation of the higher-end brand. Components that have a strong impact on evaluation are interior, wheels, chassis and the engine. Simulations show that sharing components typically translates in negative revenue consequences for both analyzed manufacturers. An interesting exception emerges for the Japanese manufacturer, which obtains a boost in total revenue when its small luxury brand shares components with its large volume brand

Mortality salience in an offline and online setting

The current study aims to examine the effects of mortality salience effects on worldview defense in an offline and online setting. Participants were 146 (66 offline and 80 online) Singaporeans. Participants were randomly assigned to either the mortality salience condition or the control condition and after a delay completed a Worldview Defense Assessment. No significant mortality salience effects on worldview defense occurred in either setting. The results might be explained by the Asian sample, Singapore's culture of tolerance, and data collection during the Coronavirus Disease 2019 (COVID-19) pandemic. Future research directions include examining the effects of COVID-19 in activating worldview defense

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Faktark med resultater fra HighCrop-projektet på side 1 samt praktiske overvejelser på side 2

The Impact of Nature Imagery and Mystery on Attention Restoration

The factors contributing to urbanization, such as population growth and the development of mega-cities, have increased environmental stressors on top of everyday stressors, resulting in information overload. This has led to the increasing incidence of direct attentional fatigue, which causes stress and mental fatigue. The attention restoration theory centres on the environment’s capacity to restore attentional deficits and suggests that there are certain qualities in the environment that restore attention, which leads to improvements in our physical, mental, and social well-being. An environment can be restorative through the activation of involuntary attention, which limits the need for directed attention. This study explored for effects of natural, built, and mixed environment types and levels of mystery on attention restoration in university undergraduates. Perceived and actual levels of attention restoration were measured using a perceived restoration scale (PRS) and the digit symbol substitution task (DSST), respectively. A total of 101 participants viewed a restorative image followed by the completion of the DSST and the PRS for each of the 18 images depicting different environments. Actual attention restoration was measured by latency values in the DSST instead of through both speed and error rates due to some operational issues with the DSST which interfered with the full achievement of the study’s aims. There was an effect of different environments and mystery on perceived attention restoration. However, there appeared to be no effect on actual attention restoration, indicating a disconnect between perceived and actual restoration. Further research is required to confirm the specific effects of natural and built environments and mystery on attention restoration

Evidence of method effects in the authoritarianism-conservatism-traditionalism scales

Right-wing authoritarianism (RWA) is notoriously complex, multifaceted, and difficult to measure as a psychological construct. Recently, Duckitt et al. developed the ACT scales, offering theoretical refinement of the RWA construct. Although the validity of the ACT scales had been supported by a considerable body of research, shortcomings in previous analyses cannot rule out the existence of possible method effects. In the present research, we sought to test for the presence of such effects in a representative community sample of adults in Singapore (N = 738). We re-evaluated the factor structure of the ACT scales by assessing four separate models using an item-based approach in our confirmatory factor analyses. Results found significant method effects associated with both the pro-trait and con-trait items in the ACT scales. The implications of these results and possible strategies for controlling method effects in the ACT scales are discussed