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In a recent paper, motivated by the study of central extensions of associative algebras, George Janelidze introduces the notion of weakly action representable category. In this paper, we show that the category of Leibniz algebras is weakly action representable and we characterize the class of acting morphisms. Moreover, we study the representability of actions of the category of Poisson algebras and we prove that the subvariety of commutative Poisson algebras is not weakly action representable.
One of the major pillars of the African Union is the integration of peoples and the ability for them to move freely from one member country to another, with the right to reside and practise their trade or profession. This aspect of integration found full expression in the Protocol to the Treaty Establishing the African Economic Community Relating to the Free Movement of Persons, Right of Residence and Right of Establishment, adopted in 2018. Upon operationalization, it will remove obstacles to the movement of people, capital and resources in the region and give expression to aspiration 2 of the African Union Agenda 2063. However, significant challenges lie on the path of its implementation. This article doctrinally reviews the protocol, looking at its prospects for promoting African integration and development, and anticipates some of the problems that the protocol will face. It concludes with recommendations for achieving its lofty but desirable ends.
Sensory differences and anxiety disorders are highly prevalent in autistic individuals with and without ADHD. Studies have shown that sensory differences and anxiety are associated and that intolerance of uncertainty (IU) plays an important role in this relationship. However, it is unclear as to how different levels of the sensory processing pathway (i.e., perceptual, affective, or behavioral) contribute. Here, we used psychophysics to assess how alterations in tactile perception contribute to questionnaire measures of sensory reactivity, IU, and anxiety. Thirty-eight autistic children (aged 8-12 years; 27 with co-occurring ADHD) were included. Consistent with previous findings, mediation analyses showed that child-reported IU fully mediated an association between parent-reported sensory reactivity and parent-reported anxiety and that anxiety partially mediated an association between sensory reactivity and IU. Of the vibrotactile thresholds, only simultaneous frequency discrimination (SFD) thresholds correlated with sensory reactivity. Interestingly, we found that sensory reactivity fully mediated an association between SFD threshold and anxiety, and between SFD threshold and IU. Taken together, those findings suggest a mechanistic pathway whereby tactile perceptual alterations contribute to sensory reactivity at the affective level, leading in turn to increased IU and anxiety. This stepwise association can inform potential interventions for IU and anxiety in autism.
Shock-tube experiments on Richtmyer–Meshkov (RM) instability at a perturbed SF$_6$ layer surrounded by air, induced by a cylindrical divergent shock, are reported. To explore the effects of reverberating waves and interface coupling on instability growth, gas layers with various shapes are created: unperturbed inner interface and sinusoidal outer interface (case US); sinusoidal inner and outer interfaces that have identical phase (case IP); sinusoidal inner and outer interfaces that have opposite phase (case AP). For each case, three thicknesses are considered. Results show that reverberating waves inside the layer dominate the early-stage instability growth, while interface coupling dominates the late-stage growth. The influences of waves on divergent RM instability are more pronounced than the planar and convergent counterparts, which are estimated accurately based on gas dynamics theory. Both the wave influence and interface coupling depend heavily on the layer shape, leading to diverse growth rates: the quickest growth for case AP, medium growth for case US, the slowest growth for case IP. In particular, for the IP case, there exists a critical thickness below which the instability growth is suppressed by both the reverberating waves and interface coupling. This provides an efficient way to modulate the growth of divergent RM instability. It is found that divergent RM instability involves weak nonlinearity and strong interface coupling such that the linear theory of Mikaelian (Phys. Fluids, vol. 17, 2005, 094105) can well reproduce the instability growth at late stages for all cases. This constitutes the first experimental confirmation of the Mikaelian theory.
Tippins et al. (2023) challenge I-O psychologists to more actively – in Miller’s oft-quoted APA presidential address – “give psychology away.” Their article provides stirring examples of the impact several of our colleagues have made in giving psychology away. In thinking about how to encourage and facilitate more of us to volunteer, we’d like to share several thoughts on our roles as I-Os, both as individuals and as a community. In particular, we propose that volunteerism is an expression of our calling as I-Os; suggest five roles we can play as individuals; discuss three roles for the community at-large; and conclude with a call to action.
Danon disease is a rare X-linked disorder caused by deficiency of the lysosome-associated membrane protein-2. We report a case of hypertrophic obstructive cardiomyopathy secondary to a novel mutation in the lysosome-associated membrane protein-2 gene in a 10-year-old male adolescent. We performed a modified extended Morrow procedure to minimise the risk of death and improve the patient’s quality of life. The patient did not have exertional dyspnoea, and auscultation did not reveal a cardiac murmur at 1-year follow-up.
In the future, when we compare the welfare of a being of one substrate (say, a human) with the welfare of another (say, an artificial intelligence system), we will be making an intersubstrate welfare comparison. In this paper, we argue that intersubstrate welfare comparisons are important, difficult, and potentially tractable. The world might soon contain a vast number of sentient or otherwise significant beings of different substrates, and moral agents will need to be able to compare their welfare levels. However, this work will be difficult, because we lack the same kinds of commonalities across substrates that we have within them. Fortunately, we might be able to make at least some intersubstrate welfare comparisons responsibly in spite of these issues. We make the case for cautious optimism and call for more research.
Personality disorders are a group of psychological disorders characterised by a developmental nature, long-lasting impairment and emotional suffering. Personality disorders have an estimated prevalence rate of approximately 8% in community settings, but in in-patient settings the rate might be as high as 76%. Cognitive–behavioural therapies (CBTs) include psychotherapies that emphasise the identification and modification of maladaptive thought patterns and behaviours that contribute to the maintenance of psychological disorders. CBTs have demonstrated their effectiveness in treating various types of personality disorder. This article focuses on the nature of personality disorders and their categorial and dimensional assessment and neurobiology. We present three influential CBT models used in personality disorders: schema therapy, cognitive interpersonal therapy and dialectical behaviour therapy. For each one, we outline the rationale, intervention strategies and therapeutic techniques, with practical examples and summary tables to illustrate their application.
The Swedish Wechsler Preschool and Primary Scale of Intelligence (WPPSI-IV) is commonly used for assessing young children belonging to the Swedish-speaking minority in Finland (Finland-Swedes), but there is no information about the generalizability of this test and its norms to this minority. Cross-cultural comparisons of WPPSI-IV are also scarce. We compared the performance of Finland-Swedish children to the Scandinavian norms of the Swedish WPPSI-IV and explored the relationship between sociodemographic factors (age, sex, parental education level, bilingualism) and the performance.
Method:
The Swedish WPPSI-IV was administered to 79 typically developing 5–6-year-old Finland-Swedish children assessed for The FinSwed Study. Their performance was compared to the Scandinavian norms using MANOVA, t-test, and confidence interval comparisons. Associations with sociodemographic variables were explored using regression analyses.
Results:
Finland-Swedish children performed, on average, 1/3 SD higher than the Scandinavian norms, a difference which was statistically significant with medium-sized effects. However, individual subtests and indexes did not differ significantly from the norms. Significant associations with sociodemographic factors were found for some but not all index scores.
Conclusions:
This study provides clinically important information for using the Swedish WPPSI-IV with the Finland-Swedish minority and demonstrates aspects that clinicians working with this minority should take into account. The results are presumably partly explained by characteristics of the present sample, and partly by cultural and linguistic differences between the Finland-Swedish population and the Scandinavian countries. The findings also illustrate that cross-cultural differences in cognitive performance may be present even between similar cultures with the same language.
This article examines how individual police officers in China interpret and justify the use of excessive force on social media through their WeChat Subscription Accounts (WSAs). Existing research examines how the police department uses social media to justify deadly force, but overlooks individual officers’ online justifications. Adopting a critical discourse analysis approach, this study analyses 211 articles commenting on a prominent case of police violence in China. The findings shed light on the online voice of Chinese frontline officers, revealing an ideology that defends the use of excessive force. The articles published in WSAs displayed strong empathy towards the involved officer; contested the characterization of the incident as police brutality by police officials, the public, and the media; and employed various strategies to justify the officer’s actions. The discussion section expands on these findings by drawing comparisons to justifications in the United States, emphasizing the distinctive dynamic between individual officers’ online expression and official police discourse in China, and offering insights for scholars examining online expression and digital nationalism in the Chinese context.