In the year 1900, Otani Kozui, along with three travel companions, ventured on a one-month Arctic cruise, visiting the Norwegian fjords, the North Cape, Spitsbergen (Svalbard) and Iceland. The turn of the 20th century was a formative time for early Arctic tourism, and the aura of exploration was still a part of the northern allure. While Otani and his friends were not the first Japanese to cross the Arctic Circle, they were seen among their contemporaries as holding the record for being the first Japanese to cross the 70th parallel, which became a badge of honour in the exclusive Arctic Circle Society that was established in Japan in the early 1930s. As one of Japan’s most important 20th-century explorers, Otani is well known for having collected and studied Buddhist treasures from across Central Asia and the Silk Road. This paper aims to establish the facts surrounding Otani’s Arctic cruise and the Arctic Circle Society, both of which have gone mostly unnoticed by contemporary scholars. The paper also discusses how Otani’s voyage – which contains elements of tourism, study and competition – should be perceived, both in the context of his legacy and the broader historical developments of the era.

Heat stress from high temperatures has been recognised as a threat to several bird species and one that is likely to increase in severity and frequency as a result of global environmental change. Many seabirds are particularly vulnerable as their adaptations to forage in cold water can make it hard for them to resist heat gain while on land. The African Penguin Spheniscus demersus forages in cool water (10–20°C) but breeds and moults on land where temperatures can exceed 30°C. Little is known about its thermal physiology and when heat stress will occur. Here, we provide the first account of changes in body temperature and behaviour in African Penguins in response to an experimental increase in ambient temperature from 20°C to 35°C. Surprisingly, the highest body temperature observed (39.2°C) was recorded at the start of the study. Presumably, this response in body temperature was due to the stress of transport and handling. Penguins returned to normal body temperature (37.3°C) after 3.5 hours and maintained normothermia for roughly an hour. We then observed the onset of heat storage at an ambient temperature of 29°C, whereafter body temperature increased steadily at a rate of ca.0.2°C per 1°C increase in ambient temperature. Panting commenced at an ambient temperature of 31.4°C, when body temperature was 37.8°C. In addition to panting, penguins changed their posture to facilitate heat dissipation by standing, raising their heads, and extending their flippers. Our results corroborate field observations and support the argument that African Penguins are highly vulnerable to heat stress in the near future as extreme heat events become more severe and frequent due to climate change. Our results also confirm that penguins are sensitive to handling, which elicits a hyperthermic response. Given the general sensitivity of penguins to disturbance, from a conservation perspective, we advise that cautionary measures be implemented at colonies during critical life-history stages.

This article examines the extent to which or how self-identified great powers resort to military aggression following events that challenge their sense of greatness. It problematises the prevalent notion that great powers and events exist and have effects independently of the narratives that constitute them. The article does this by engaging with Ontological Security Studies, Great Power Narcissism, and the psychology of vulnerable and grandiose narcissism, as well as by analysing Japanese identity narratives in two periods seemingly marked by equally challenging events – the Meiji era (1868–1912) and the post-war period (1950–71). It finds that Japan’s military aggression against China in 1894–5 was enabled by vulnerable narratives of shame and insult, while the decision to wage war with Russia a decade later was facilitated more by grandiose narratives. Despite Japan’s overwhelming defeat in the Second World War and the persistent desire among conservative elites for great power status and identity, however, overall post-war narratives did not feature similarly negative emotions and calls for revenge. Japanese great power aspirations were arguably curtailed in this period through intense narrative contestation, notably progressive counter-narratives featuring more self-reflective expressions of guilt and remorse, and even the self-reflexive desire for a non-great power identity.

Where do values live in thought? A straightforward answer is that we (or our brains) make decisions using explicit value representations which are our values. Recent work applying reinforcement learning to decision-making and planning suggests that, more specifically, we may represent both the instrumental expected value of actions as well as the intrinsic reward of outcomes. In this paper, I argue that identifying value with either of these representations is incomplete. For agents such as humans and other animals, there is another place where reward can be located in thought: the division of the space of possibilities or “state space.”

This article formulates an original account of the Enlightenment through an interpretation of C. L. R. James’s The Black Jacobins, a landmark work of transatlantic anti-colonial thought. It defends a dialectical account of the Enlightenment as a singular transatlantic historical process whose content and critical import changes across space and time. In The Black Jacobins, James shows the Enlightenment’s revolutionary and emancipatory political legacy by staging the dialectic of the Enlightenment in a colonial situation defined by a slave-plantation economy. James illustrates the Enlightenment’s political legacy as a “concrete universal” that has particular and singular aspects, each with its own unique contours. In doing so, the article considers other themes at the center of both historical and contemporary political theory such as how to best conceptualize colonialism; the traveling and misplacement of Enlightened ideas; and the critical importance of the dialectical legacy and critical theory in these efforts.

The autonomous navigation and obstacle avoidance capabilities of autonomous underwater vehicles (AUVs) are essential for ensuring their safe navigation and long-term, efficient operation. However, the complexity of the marine environment poses significant challenges to safe and effective obstacle avoidance. To address this issue, this study proposes an AUV obstacle avoidance control algorithm based on offline reinforcement learning. This method adopts the Conservative Q-learning (CQL) algorithm, which is based on the Soft Actor-Critic (SAC) framework. It learns from obtained historical obstacle avoidance data and ultimately achieves a favorable obstacle avoidance control strategy. In this method, PID and SAC control algorithms are utilized to generate expert obstacle avoidance data to construct a diversified offline database. Additionally, based on the line-of-sight (LOS) guidance method and artificial potential field (APF) method, information regarding the distance and orientation of targets and obstacles is incorporated into the state space, and heading and obstacle avoidance reward terms are integrated into the reward function design. The algorithm successfully guides the AUV in autonomous navigation and dynamic obstacle avoidance in three-dimensional space. Furthermore, the algorithm exhibits a certain degree of anti-interference capability against uncertain disturbances and ocean currents, enhancing the safety and robustness of the AUV system. Simulation results fully demonstrate the feasibility and effectiveness of the intelligent obstacle avoidance method based on offline reinforcement learning. This study highlights the profound significance of offline reinforcement learning in enabling robust and reliable control systems for AUVs, paving the way for enhanced operational capabilities in challenging marine environments.

When do public policies influence citizens’ political attitudes and behavior, and among whom? We study this question using one of the largest social provision programs in the United States: the Earned Income Tax Credit (EITC). We exploit the staggered roll-out of state-level EITC programs to estimate the causal effect of the program on elections, voter behavior, and attitudes about the government. Contrary to predictions from the policy feedback literature, we show that the credit leads to higher vote shares and approval ratings for the implementing governor. These effects are temporally limited to the first years of the credit’s availability and dissipate over time. Taken together, our results offer new insights about the conditions under which particularistic economic policies affect political outcomes.

During our research programme about mussel spat in Amsa Bay, we found some specimens of Hesione sicula delle Chiaje, 1830 and noted as the first record for Mediterranean Moroccan coasts and for the Mediterranean coastlines of North Africa. Five specimens of this species were collected for the first time in the Amsa shellfish farm on October 30, 2021, and we provide some characteristics and illustrations for the species. This new record from the bay contributes to the Polychaeta list of North Africa and expands the geographical distribution range of species within the Mediterranean Sea.

Spain increased its minimum wage (MW) by 22% in 2019. Given the intense debate in the economic literature on the impact of MW increases on the labour market, we conduct an impact assessment of this policy. The synthetic control method will be used to replicate the Spanish labour market by means of a pool of European countries that, in the absence of other reliable measures, simulates the evolution of Spanish employment. This will allow us to identify the causal effect from the increase in the MW. After applying the technique, the increase in the MW is found to have no effect on employment. The results have been subjected to robustness tests such as leave one out or segmentation by gender or age.

All spaces are assumed to be Tychonoff. Given a realcompact space X, we denote by $\mathsf {Exp}(X)$ the smallest infinite cardinal $\kappa $ such that X is homeomorphic to a closed subspace of $\mathbb {R}^\kappa $. Our main result shows that, given a cardinal $\kappa $, the following conditions are equivalent:

• • There exists a countable crowded space X such that $\mathsf {Exp}(X)=\kappa $.

• • $\mathfrak {p}\leq \kappa \leq \mathfrak {c}$.

$\mathfrak {d}\leq \kappa \leq \mathfrak {c}$

$2^\kappa $

$\kappa $

$\kappa $

$\mathsf {Exp}(X)$

Small and medium pelagic fish (SMPF, i.e. Scomber colias, Trachurus spp, Sardina pilchardus, and Sardinella spp) in the Canary Islands are mainly targeted by the artisanal purse-seine fleet. The waters in the archipelago (located in the coastal transition zone of the Canary Current Eastern Boundary Upwelling System) are monitored since the late nineties by a hydrographic section (RAPROCAN) designed to study the temporal variability of the eastern subtropical gyre. In this study we analyse the relationship between the SMPF abundance assumed from official sale notes (reported since 2007) and several oceanographic parameters obtained for the outermost water layer (Sea Surface Temperature, SST, and concentration of chlorophyll a, Chla) and from the 200–800 m depth waters (Sea Temperature, ST_200–800, and salinity, Salinity_200–800). Except for SST, statistically significant correlations occur between environmental variables and SMPF landings when one-year time-lag is considered, matching with the time period necessary for these species to attain legal catchable sizes and, hence, being catchable by the fishery. However, in the GLM only Chla resulted a significant explaining variable for the SMPF landings during the following year, probably because this strong correlation overshadows the ST_200–800 influence. Keeping the monitoring systems is crucial to understand, foresee and anticipate potential variations in the fishery resources and to aim the sustainable exploitation of the SMPF populations, even more challenging in the current climate change scenario.

Statutory minimum wages have become an important tool for regulating labor markets. One major reason is the decline in collective wage bargaining. But how can minimum wages be justified? We show that their best justification does not lie in their economic effects but in the respect for social contributors that they express. The article takes an innovative interdisciplinary approach, bridging political philosophy and comparative political economy. We first discuss existing justifications in political practice and theory. We then show how a distinctive and robust justification should regard minimum wages as paying necessary respect to those who fulfill their obligation to contribute to social cooperation. Our justification thus suggests a new concept of economic citizenship and advances recognition theory applied to work. We outline further implications of the argument, such as the desirability of setting minimum wages through collective bargaining, and a tentative case for a maximum income.

Au sein de l’Organisation des États américains (OÉA),1 la Commission interaméricaine des Droits de l’Homme (CIDH) et la Cour interaméricaines des Droits de l’Homme sont les deux principaux organes chargés de veiller à la protection des droits de la personne dans les Amériques.2 Ces instances sont habilitées à instruire des recours individuels intentés contre des États membres et portant sur des allégations de violations de la Convention américaine relative aux Droits de l’Homme (CADH)3 et d’autres instruments interaméricains applicables.4 La présente chronique portera sur certaines décisions rendues par la Cour pendant l’année 2023.

Throughout the twentieth century, considerable research has been dedicated to understanding the rise, development and end of ancient cities. In recent years, there has been a remarkable upsurge of new methodological and theoretical approaches applied in urbanism studies, which enables us to improve, validate or question our knowledge about ancient urban life. The three books reviewed here concern the development, transformation and experience of ancient Roman cities; leading experts in urban history and archaeology discussing the potential of new technologies and conceptual frameworks for analysing Roman urban space.