Hexahydrocannabinol (HHC) is a semi-synthetic cannabinoid that recently emerged as a legal alternative to Δ9-tetrahydrocannabinol. Due to emerging concerns regarding its neuropsychiatric safety profile, including psychosis, it was banned in July 2025. We report two cases of HHC-induced psychosis in adolescents requiring inpatient psychiatric admission, both with no prior psychiatric history. Both individuals required about six weeks of inpatient treatment, with their symptoms resolving following abstinence from HHC and antipsychotic medications. These cases support recent regulatory measures banning HHC and highlight the need for ongoing clinician awareness of this agent and its associated risk of psychosis.

A new species Acutigebia succinacia from the Pacific coast of Honshu and Kyushu, Japan, is described and compared with A. simsoni (Thomson, 1893). The new species differs from A. simsoni in having a spine on the lower margin of antennal article 1, whereas A. simsoni is unarmed. The genetic divergence of partial 16S rRNA gene sequence (491 bp) between A. succinacia sp. nov. and A. simsoni is 6.34–6.60%. A key to the seven species of Acutigebia is presented.

Canine angiostrongylosis is a life-threatening disease caused by infection with the metastrongyloid nematode Angiostrongylus vasorum. As animal travel and translocation have increased in recent times, many infectious agents, including A. vasorum, have expanded to new geographic areas. Here we report the first molecularly confirmed case of angiostrongylosis in a translocated dog in Estonia. We also analyse the phylogenetic relationship of the isolate with previously described European isolates and describe the challenges encountered in diagnosing this disease. Given the expanding geographic distribution of A. vasorum across Europe, our findings underscore the need for improved diagnostic awareness to control the parasite’s transmission.

W. E. B. Du Bois theorized that the way Black Americans understand the racial world and their place within it shapes their connections to national identity differently from those of White Americans. This article juxtaposes Du Bois’s theory of racialized subjectivity with Identity Theory’s constructs of prominence and change to examine differences in attachment to American nationhood during a turbulent period of American politics: the Trumpism era. Using data from three waves of the American National Election Studies (2012, 2016, 2020), this study examines the extent to which White and Black Americans viewed their national identities as important before, during, and after Trump’s first presidential administration. I employ “racial identity prominence” as a nuanced measure of race to illustrate a phenomenological element of American national identity that differentially shapes attachment. The findings reveal that the Trumpism period catalyzed significant identity change between 2012 and 2020. Moreover, the degree to which White and Black Americans connected to their national identity across the three election years largely depended on the subjective importance they assigned to their racial identity—that is, their racial identity prominence. The White American archetype was reinforced, as Whites with strong attachment to their racial identity also expressed strong national identity. Interestingly, Black Americans also expressed strong ties to their national identity during this period, particularly those with a strong racial identity. Still, the question of how White and Black Americans envision the country and their place in it remains complex.

This paper reviews a purposive sample of doctoral dissertations in second-language education, completed between 2019 and 2023 at universities in Germany. Among the 79 relevant dissertations found from this period, 18 thematic strands were identified, of which 7 were chosen as being particularly relevant for a more in-depth review: (1) evaluation of specific teaching approaches, (2) (partial) language skills, (3) individual variables, (4) special learner groups, (5) multilingualism pedagogies, (6) digital media, and (7) literature and film pedagogy. We identify relevant topics and relate these to trends in research methodology (qualitative/quantitative/mixed methods). We also discuss the depth and breadth of these dissertations and situate their scholarly contributions within German and international research on additional language education. A comparison with the three previous review articles reveals methodological developments and thematic shifts, highlighting both progress and persistent challenges in German-language doctoral research across nearly two decades of scholarship.

We prove that if $p \geq n^{-(q-6)/2}$, then asymptotically almost surely the binomial random q-uniform hypergraph $\mathcal{G}^{(q)}(n,p)$ contains an (n, q, 2)-Steiner system, provided n satisfies the necessary divisibility conditions.

A child with a pathogenic MYBPC3 gene mutation progressed from normal to severe obstructive hypertrophic cardiomyopathy with dynamic outflow obstruction from septal hypertrophy and abnormal papillary muscle insertion, highlighting careful subvalvular assessment for surgical planning.