Lewin and colleagues’ article in this journal gives a good overview of how artificial intelligence (AI) is contributing to the reshaping of mental healthcare. However, a deeper focus on the synergies between different approaches to AI and its goals is needed. This commentary aims to further consider the unique implications of digital mental health approaches, including predictive, explainable and generative AI, for both research and clinical objectives.

This essay examines the Army’s efforts to cultivate and gain congressional support for the GI Bill in the 1980s. Focusing on the relationship between Representative Sonny Montgomery, senior Army leaders like Maxwell R. Thurman and Robert Elton, and the staffers who worked for each of them, it illustrates the intentionality with which Army leaders worked to cultivate congressional support for and to head off congressional and presidential opposition to a bill that they saw as essential. Analyzing their public and private efforts at critical moments when the legislation was imperiled reveals that relations between the Army and Congress are more intricate than testimony at hearings and budget requests might reveal, that throughout the 1980s, Army leaders remained deeply concerned about sustaining the All-Volunteer Force, and that the ultimate success of that force and the legislation that helped ensure it rested with individuals who built and then leveraged personal relationships.

A chemical explosion and fire erupted in Conakry, Guinea, West Africa on December 18, 2023, destroying Guinea’s main fuel depot and resulting in 25 dead and 459 injured. Fifteen of the deaths occurred directly at the explosion site. Firefighters initiated efforts to control the blaze and transported injured, non-ambulatory victims to local hospitals with assistance from the military, Red Cross, and mining companies. Thirteen clinical facilities within an eight-mile radius of the explosion received burn and non-burn victims, with only one of these, Donka National Hospital, capable of handling burn victims. Many less seriously injured victims self-selected where they sought care, although anecdotal information indicates that an unknown number of injured did not seek care or chose to leave the city. The disaster marked the first time stakeholders from various sectors in the Guinean society (from first responders to mining companies) came together in a concerted response. Ranked 179th of 193 countries on the Human Development Index (HDI), the disaster rapidly outstripped Guinea’s response and health care capabilities, leaving behind economic shocks affecting livelihoods and the local economy. These experiences underscore the need for improved capabilities and coordination in disaster planning, warning and communication systems, and prehospital and hospital response in developing countries.

This study presents the integrated results of stable carbon (δ13C) and nitrogen (δ15N) isotope and aDNA analyses, conducted to examine dietary and mobility practices in two mid- to late Byzantine communities in western Anatolia: the coastal cosmopolitan site of Kadıkalesi Anaia and the rural inland settlement of Barcın Höyük. Isotopic data from thirty-eight individuals indicate that both populations primarily consumed terrestrial C₃-based resources. At Kadıkalesi, δ15N values show greater variability, suggesting more differentiated access to animal protein sources, whereas the rural community at Barcın Höyük exhibits isotopic homogeneity, consistent with more uniform dietary practices and an equitable access to food. Kadıkalesi also shows intra-site dietary variation by age and sex, while Barcın is again more homogeneous. At Barcın, aDNA results indicate a predominant local genetic continuity, suggesting a stable population; a single instance of external ancestry is attested by a male individual with affinities to western populations, particularly from eastern Europe, in line with historical military resettlement patterns (stratiotika ktemata). By integrating isotopic and genomic evidence, this study demonstrates how ancestry and mobility shaped dietary habits, offering insights into the interplay of urbanism, mobility, and social organization in the Byzantine period.

The Supreme Court is less constrained than political science has recognized. Motivated justices can dramatically alter politics without deferring to actors in the other branches. Subverting constraints, justices can aggrandize power and impose their irreducible preferences. Using Reconstruction as an example, this article brings new evidence to support the claim that an autonomous Court precipitated the end of Reconstruction. I make three essential arguments: First, the Republican commitment to federal civil rights protection extended longer than is traditionally supposed. Second, the architect of postbellum constitutionalism, Justice Bradley, harbored long-standing fear of Black equality and enfeebled the Reconstruction amendments when neither legal nor political imperatives compelled him to do so. Last, Bradley’s interventions substantially hindered Reconstruction by facilitating the “redemption” of southern state governments. This article employs mixed-methodology, using a difference-in-differences analysis and novel archival data. Contrary to scholarship arguing that the Court simply followed a Republican retreat, the Court dramatically reshaped the political-social development of Reconstruction.

Le 8 juin 2023, le Canada et les Pays-Bas ont saisi la Cour internationale de justice (CIJ) pour des violations de la 1984 Convention contre la torture et autres peines ou traitements cruels, inhumains ou dégradants attribuées à l’État syrien. À cette situation étatique, souvent décrite comme une zone où le droit et la justice n’avaient pas leur place, se superposent ainsi de premiers efforts pour que l’État rende des comptes. Au-delà de la possibilité dont dispose la Cour internationale de Justice (CIJ), en tant que visage institutionnel de la responsabilité étatique, de réduire ici le “fossé d’impunité,” cette affaire met également en lumière la tension existante entre deux visions opposées du droit international (“universaliste” et “souverainiste”) qui sont appelées à coexister dans le cadre de la lutte contre l’impunité. Bien que cette affaire, s’inscrivant dans une lignée jurisprudentielle favorable à l’élargissement de la fonction judiciaire de la CIJ, confirme la proximité avec le modèle “universaliste” eu égard à l’extension du locus standi devant son prétoire et à l’évolution de son mandat pour embrasser les contextes gouvernés par des violations massives des droits de la personne, il ne faudrait pas en déduire que le paradigme “souverainiste” a été effacé et remplacé.

Twin fetuses show a physiologically slower growth rate in the third trimester compared to singletons. Therefore, it has been suggested that the anthropometric evaluation of twins at birth should be performed using twin-specific charts. To be reliable, anthropometric charts need to fulfil certain methodological criteria to systematically review studies that have developed neonatal twin-specific anthropometric charts and assess their methodological quality. A comprehensive search was conducted across Cinahl, Embase, Global Index Medicus, PubMed, Scopus, Web of Science, Google Scholar, and relevant preprint repositories, followed by a predefined snowballing search. Two reviewers independently screened studies for eligibility, selecting those that have developed cross-sectional anthropometric charts for twins at birth, published since January 1990. Articles were excluded if they did not use anthropometric measurements at birth to construct charts. Two reviewers independently extracted data and performed quality assessment with a 16-item grading system. Sixty-eight studies were included, with all but one constructed reference, not standard, charts. Most studies did not meet the quality criteria: only 9% were prospectively designed, 34% reliably estimated gestational age, 19% reported standardized instruments, 28% described measurement techniques, and 26% did not stratify centiles by sex. This review reveals considerable methodological limitations in existing twin-specific neonatal anthropometric charts.

The optically stimulated luminescence (OSL) sensitivity of quartz ranges across five orders of magnitude. Previous studies suggested that quartz OSL sensitivity is enhanced by solar exposure–burial irradiation cycles. Spatially resolved luminescence measurements and laboratory illumination–irradiation experiments were used to investigate the OSL sensitivity of quartz crystals from a granodiorite cobble and quartz grains from a fluvial sand. Quartz from the granodiorite cobble has low OSL sensitivity, showing an approximately linear sensitization path that resulted from laboratory illumination–irradiation cycles. The mean OSL sensitivity of quartz sand grains (100 grains) increased from ∼40 to 80 counts after 1260 illumination–irradiation cycles. Each grain has a specific sensitization trajectory due to illumination–irradiation cycles, suggesting that quartz crystal composition heterogeneities drive the OSL sensitization of their daughter sediment grains. Maximum OSL sensitivity of quartz sand grains is reached after illumination–irradiation cycles representing an accumulated dose of around 4000 Gy. This dose corresponds to sediment burial time of 2–4 Ma, which is unlikely to occur during a single sediment transport route. This study suggests that illumination–irradiation cycles are unable to produce quartz sand grains with OSL sensitivity up to five orders of magnitude higher than the sensitivity of parent crystals in igneous or metamorphic rocks.

This paper studies efficiency in the housing market in the presence of search frictions and endogenous entry of buyers and sellers. These two features are essential to explain the housing market stylized facts and to generate an upward-sloping Beveridge Curve in the housing market. Search frictions and endogenous entry create two externalities in the market. First, there is a congestion externality common to markets with search frictions. Sellers do not internalize the effect of listing a house for sale on other sellers’ probability of finding a buyer. Second, the endogenous entry of buyers leads to a participation externality, as new entrants in the market raise search costs for all buyers. The equilibrium is inefficient even when the Hosios-Mortensen-Pissarides condition holds. Using a calibration to the US housing market, we quantify the size of these externalities and how far the housing market is from the optimal allocation. The optimal vacancy rate and time-to-sell are about half their equilibrium counterparts, whereas the optimal number of buyers and homeowners are above their decentralized equilibrium values. Finally, we investigate how housing market policies restore efficiency in the housing market.