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A viscoelastic boundary element method has been developed to model the motion of silicon dioxide and silicon nitride during thermal oxidation of silicon. This technique uses Kelvin's solution reformulated according to the correspondence principle on viscoelasticity. Constant‐velocity loading is chosen to ensure smooth variations in displacement and stress behavior for a wide range of relaxation times.

Positive psychology is an area of rapid development in mainstream psychology, yet it has had little impact thus far in the field of dual diagnosis (DD). Effective treatment for clients with DD is limited, due to the lack of all-encompassing interventions that treat the two conditions simultaneously. The purpose of this paper is threefold: first, to discover the prevalence of DD among users of selected drug services in Manchester; second, to explore differences between DD clients and those with substance use in hope, resilience, and well-being; and third, to identify predictors of hope, resilience, and well-being in this population.

The Snyder Hope Scale, the Connor-Davidson Resilience Scale, and the Short Warwick-Edinburgh Mental Well-being Scale were administered to 113 users of drug services through a convenience sampling method.

Findings from this preliminary investigation indicated that the DD group were more vulnerable as they were less hopeful, less resilient, and had poorer well-being than their counterparts.

This population of clients might benefit from specialized integrated treatment facilitating hope and resilience, which in turn would improve their well-being.

The present study addresses a gap in the literature. Although the above positive psychological aspects have been looked at in relation to mental health, and in relation to addiction, the current research explores these positive dimensions with regard to the co-occurrence of substance abuse and mental illness.

It is commonly recognized in the UK Higher Education (HE) sector that the United States has dominated the practice of applying and articulating service-learning as a pedagogical approach for several decades (see Bringle & Hatcher, 1996; Butin, 2003; Eyler & Giles, 1999; Furco & Billig, 2002; Morton & Troppe, 1996). The use of service-learning as a pedagogical approach is an emerging field in the UK, responding to strategic agendas such as national assessment of academic impact and the civic role of universities.

Unwanted intrusive thoughts (UITs) are a major public health concern (Nock et al., 2008; Bentum et al., 2017), and they are key to the development of a variety of dysregulated behaviours (Jungmann et al., 2016; Bergen et al., 2012). Thus, this study aims to investigate reductive mechanisms for unwanted intrusive thoughts by analysing aspects of affectivity in clinical and non-clinical samples.

Quantitative means of data collection and analysis were used to explore UITs and affectivity. In total, 530 adults took part in this study (236 males, 253 females and 15 transgenders). Participants consisted of clinical (N = 168) and non-clinical samples (N = 336) who completed the Midlife in the United States sense of control scale (Lachman and Weaver, 1998), 20-item neuroticism scale (Goldberg, 1999), self-compassion scale (Neff, 2003a), flourishing scale (Diener et al., 2009), Positive and Negative Affect Schedule - Negative Scale (Watson et al., 1988), generalised anxiety disorder seven-item (Spitzer et al., 2006) and repetitive thinking questionnaire-10 (McEvoy et al., 2010).

Participants who experienced high levels of psychological flourishing, emotional stability, self-compassion, perceived control and affective well-being were prone to experience minimal UITs. Anxiety was positively related to UITs. These findings suggest that these aspects of affectivity may aid the reduction or management of clinical and non-clinical unwanted intrusive thoughts.

This study has addressed gaps in knowledge and the literature on UITs by demonstrating that psychological flourishing, emotional stability, self-compassion, perceived control and affective well-being as aspects of affectivity can be implemented as a reductive mechanism for UITs, and such implementation may have a high probability of effective reduction or management of clinical and non-clinical unwanted intrusive thoughts.