Black feminists in the United States have made sophisticated arguments for the abolition of the prison industrial complex, of which criminal law is a crucial component. This literature offers a materialist critique of the carceral system, demonstrating the centrality of prisons for processes of both dispossession of Black communities, and accumulation of capital through the extraction of Black labor inside prisons. In this essay, I explore the potential and limits of an abolitionist critique of international criminal law (ICL), and I argue that there is a danger of losing the radical edge of Black feminist scholarship if its insights are transplanted without its explicitly anti-capitalist politics.

La maltraitance organisationnelle envers les personnes aînées est présente dans différentes organisations, y compris dans le secteur de la santé et des services sociaux. Elle peut entraîner des conséquences négatives importantes sur la santé mentale et physique, ainsi que la qualité de vie, des personnes aînées qui la subissent. L’objectif de cet article est de présenter les enjeux éthiques liés à la maltraitance organisationnelle perpétrée envers les personnes aînées qui reçoivent des services de soutien à domicile. Une approche d’inspiration phénoménologique utilisée auprès d’ergothérapeutes pour identifier les enjeux éthiques de leur pratique a mené à une analyse des enjeux éthiques spécifiquement liés à des situations de maltraitance organisationnelle. Quinze ergothérapeutes (n=15) œuvrant en soutien à domicile au Québec ont été rencontrés dans le cadre d’entretiens individuels. L’analyse a été effectuée en utilisant une perspective écologique. Les résultats de l’analyse révèlent plusieurs enjeux éthiques complexes de nature micro, méso et macrosystémiques, dont l’abandon administratif des bonnes pratiques, l’accès déficitaire aux services, la chosification de l’aîné, la dépersonnalisation des services et la tolérance des violences.

The bi-stable dynamics of a one-degree-of-freedom disk pendulum swept by a flow and allowed to rotate in the cross-flow direction is investigated experimentally. For increasing flow velocity, a subcritical bifurcation is observed from a Pendulum state, characterised by an increasing time-averaged pendulum angle with large amplitude fluctuations, to a rotating state with a non-zero mean rotation velocity at a critical free stream velocity $U_{P2W}$. The rotating state, referred to as Windmill state, presents a strong hysteresis: once initiated, it is sustained down to velocities $U_{W2P}\lt U_{P2W}$ before bifurcating towards the Pendulum state. A thorough experimental characterisation of the dynamical features of each state is reported, with a particular focus on the influence of the static yaw angle of the disk $\beta _0$ and the free stream velocity. In the Pendulum state, the system behaves differently depending on whether $\beta _0$ lies below or above the stall angle of the disk, with more regular dynamics below. We demonstrate that the bifurcation between the Pendulum state and the Windmill state is triggered by aerodynamic fluctuations, while the bifurcation between the Windmill state and the Pendulum state is deterministic. A stochastic model faithfully reproduces the dynamical features of both states, as well as the characteristics of the bifurcations.

Microorganisms, such as spermatozoa, exhibit rich behaviours when in close proximity to each other. However, their locomotion is not fully understood when coupled mechanically and hydrodynamically. In this study, we develop hydrodynamic models to investigate the locomotion of paired spermatozoa, predicting the fine structure of their swimming. Experimentally, sperm pairs are observed to transition between different modes of flagellar synchronisation: in-phase, anti-phase and lagged synchronisation. Using our models, we assess their swimming performances in these synchronisation modes in terms of average swimming speed, average power consumption, and swimming efficiency. The swimming performances of paired spermatozoa are shown to depend on their flagellar phase lag, flagellar waveforms, and the mechanical coupling between their heads.

‘Death in the monastery’ refers to liminal and temporal themes of dying in the poetry of an anonymous Carthusian monk-poet in the period 1964–2024. This article explores these topics in three subsections. The first section deals with texts where the monk-poet reflects on moments when he has witnessed the dying of a fellow monk. The second set of texts focuses on memories written about recently deceased members of the Carthusian monastic community. The third section consists of the Carthusian author’s reflections that arise from the physical proximity of the graveyard at the centre square of the monastery. The article concludes with some remarks on the liminal and temporal perspectives on dying in a monastery. Time spent with God in a cloister, while frequently witnessing the deaths of other members of the monastic community, prepares for a transition where death is followed by resurrection.

We compute the open Gromov-Witten disk invariants and the relative quantum cohomology of the Chiang Lagrangian $L_\triangle \subset \mathbb {C}P^3$. Since $L_\triangle $ is not fixed by any anti-symplectic involution, the invariants may augment straightforward J-holomorphic disk counts with correction terms arising from the formalism of Fukaya $A_\infty $-algebras and bounding cochains. These correction terms are shown in fact to be nontrivial for many invariants. Moreover, examples of nonvanishing mixed disk and sphere invariants are obtained.

We characterize a class of open Gromov-Witten invariants, called basic, which coincide with straightforward counts of J-holomorphic disks. Basic invariants for the Chiang Lagrangian are computed using the theory of axial disks developed by Evans-Lekili and Smith in the context of Floer cohomology. The open WDVV equations give recursive relations which determine all invariants from the basic ones. The denominators of all invariants are observed to be powers of $2$ indicating a nontrivial arithmetic structure of the open WDVV equations. The magnitude of invariants is not monotonically increasing with degree. Periodic behavior is observed with periods $8$ and $16.$

In this study, we conducted interface-capturing high-resolution simulations of a bubbly upflow in a vertical channel to investigate the bubble distribution and its interaction with surrounding turbulence, focusing on the effects of the density ratio. A bulk Reynolds number $Re_b=2300$ was used for all simulations. The influence of density ratio on vortex structures and turbulence statistics differed between the near-wall and core regions of the channel. Adding 5.43 $\%$ gas caused an increase in wall friction. By applying a generalised FIK identity to analyse wall friction, it was determined that the drag rise in the bubbly channel was mostly due to the near-wall region. Visualisation of the bubble and vortex structures showed that small bubbles near the wall induced larger magnitude of Reynolds shear stress and increased wall friction. Bubble behaviour near the wall region was similar for density ratios above 30, leading to wall friction saturation. In the core region, large deformable bubbles created wake vortices due to slip velocity between liquid and gas phases. Wake vortices help large bubbles absorb smaller bubbles and maintain their sizes. As the density ratio increased, the slip velocity increased owing to greater difference in the gravitational acceleration between liquid and gas phases, resulting in corresponding increase in wake intensity and velocity fluctuations. However, quadrant analysis showed that Q1 and Q3 events increased together with Q2 and Q4 events in the core region, cancelling out any net effect of wake vortices on Reynolds shear stress or wall friction.

Highly resolved simulations reveal the fundamental influence of a carrier fluid’s flow dynamics on triboelectric powder charging. We found that particles transported through a square-shaped duct charge faster than in a channel flow caused by secondary flows that led to more severe particle–wall collisions. Specifically, particles with a Stokes number of 4.69 achieve 85 % of their equilibrium charge approximately 1.5 times faster in duct flow than in channel flow. Also, charge distribution is more uniform in a duct cross-section compared with a channel cross-section. In channel flow, particles are trapped near the walls and collide frequently due to limited movement in the wall-normal direction, causing localized charge buildup. In contrast, duct flow promotes better mixing through secondary flows, reducing repeating collisions and providing uniform charge distribution across the cross-section. Upon charging, electrostatic forces significantly reshape particle behaviour and distribution. Once the powder achieves half of its equilibrium charge, particles increasingly accumulate at the wall, leading to a reduced concentration in the central region. These changes in particle distribution have a noticeable impact on the surrounding fluid phase and alter the overall flow dynamics. These findings open the possibility for a new measure to control powder charging by imposing a specific pattern.

Isoclinic subspaces have been studied for over a century. Quantum error correcting codes were recently shown to define a subclass of families of isoclinic subspaces. The Knill–Laflamme theorem is a seminal result in the theory of quantum error correction, a central topic in quantum information. We show there is a generalized version of the Knill–Laflamme result and conditions that applies to all families of isoclinic subspaces. In the case of quantum stabilizer codes, the expanded conditions are shown to capture logical operators. We apply the general conditions to give a new perspective on a classical subclass of isoclinic subspaces defined by the graphs of anti-commuting unitary operators. We show how the result applies to recently studied mutually unbiased quantum measurements (MUMs), and we give a new construction of such measurements motivated by the approach.

The Optimal Currency Area (OCA) theory is utilized to evaluate if Brexit is supported in the context of economic integration. In brief, the greater the conformity to the criteria motivated by the OCA model, the greater the feasibility of a monetary integration between the UK and the EU. Logically, if conditions are conducive for a monetary integration, Brexit – which is a disintegration – is thus unsupported. On the other hand, if circumstances are unfavourable for monetary integration, further economic integration with the current customs union of the EU is not indicated, hence Brexit is not contradicted.

We show that the sets of $d$-dimensional Latin hypercubes over a non-empty set $X$, with $d$ running over the positive integers, determine an operad which is isomorphic to a sub-operad of the endomorphism operad of $X$. We generalise this to categories with finite products, and then further to internal versions for certain Cartesian closed monoidal categories with pullbacks.

Real-time wave forecasting (RTWF) consists in predicting ocean wave motion or forces, from seconds to minutes in advance, using real-time measurements. For the successful development of RTWF, understanding wave predictability is essential. Usually, a deterministic ‘predictable zone’ (DPZ) is geometrically constructed from the wave group velocities and directions present in the spectrum. DPZs have little experimental evidence, and suffer ambiguities regarding the choice of cutoff frequencies and directions – since actual ocean waves are not band-limited. The present study addresses those shortcomings, by defining probabilistic predictable zones (PPZs) with respect to chosen uncertainty thresholds, using a rigorous statistical framework restricted to near-Gaussian sea states (precisely those where RTWF would be employed). PPZs are examined in idealised spectra and in a stereo dataset of a real wave field. It is shown that the PPZ geometry is quantitatively related to the sea state characteristics, through three physical parameters: two limiting group velocities (similar to the deterministic theory), and a directional spreading effect, which also limits the PPZ extent. While the lower group velocity depends on the chosen uncertainty threshold, the upper group velocity is better approximated by that of the spectrum peak frequency, which is a novel finding. The empirical data support the validity of the present PPZ theory. In contrast, both theoretical and empirical results contradict the fan-shaped predictable zones, constructed in the three-dimensional deterministic theory, thus highlighting the importance of considering stochasticity to understand the predictability of actual ocean waves.

Every May 18, mourners gather near the sandy beaches of Mullivaikkal, a small strip between Chundikulam and Mulltaitivu in the Northern province of Sri Lanka, to commemorate the 2009 genocide against the Tamils. Mullivaikkal is where approximately three hundred thousand Tamil civilians found refuge as they fled the military bombardment between January and May 2009.1 Starting in 2010, the remembrance day commemoration attracts thousands of locals, coming together near the beach to reflect and remember. Increasingly, the commemoration also attracts transitional justice experts, along with diplomats and international governmental organization workers. In my contribution, I reflect on the work of the local and diaspora Tamil transitional justice experts as they begin to gather evidence from the families of victims for the newly created 2024 Commission for Truth, Unity and Reconciliation. Drawing on Homer's The Odyssey and the story of the “lotus eaters,” I frame these experts as “truth eaters,” preoccupied with collecting victim narratives for the purpose of personal gratification. As they engage in the repeated collection of particular elements of the victims’ truth—elements predicated on the demands of the field of transitional justice—the truth eaters are oblivious to the root causes of the war. I explain how attention to root causes through a Third World Approaches to International Law (TWAIL) lens can avoid the effects of the dominant liberal modes of truth seeking reflected in the work of these truth eaters.

Rational or epistemically justified beliefs are often said to be defeasible. That is, beliefs that have some otherwise justification conferring property can lose their epistemic status because they are defeated by some evidence possessed by the believer or due to some external facts about the believer’s epistemic environment. Accordingly, many have argued that we need to add a so-called no defeater clause to any theory of epistemic justification. In this paper, I will survey various possible evidentialist as well as responsibilist no-defeater clauses and develop a general taxonomy of defeater cases against which these clauses can be tested. Despite influential arguments that evidentialist understandings of justification are ill-equipped to handle the full spectrum of defeater cases, I will demonstrate that evidentialism has the right tools to make sense of all kinds of defeaters, including propositional and normative defeaters. Moreover, I will demonstrate that the proposed solution avoids recently influential objections against the notion of defeat.

We report laboratory experiments of long-crested irregular water surface waves propagating over a shoal, with attention to the region over the down-slope behind the shoal. We measure the surface elevation field, the horizontal velocity field in the water, and the resulting forces on a horizontal submerged cylinder placed over the down-slope of the shoal. In addition, we calculate the horizontal acceleration field. From this, we find that the presence of the shoal can modify the wave field such that the resulting forces on the submerged cylinder can be enhanced with thicker extreme tails and increased values of skewness and kurtosis depending on the location of the cylinder. The spatial dependence of the statistics of forces is different from the spatial dependence of the statistics of horizontal velocity, horizontal acceleration and surface elevation.