R.J. (Bob) Morris’ contribution to debates around the history of class, associational culture and urban governance have underpinned numerous publications across the decades. This article extends the appreciation of Bob’s work to reflect on how his approach to documenting, demystifying and disseminating the history and heritage of cities and industrial places – including through his use of photography – made a notable impact at the interface between urban and public history and has had a lasting impact on future generations of urban historians’ approach to understanding the historic built environment.

In this study, measurements and numerical analyses of the temperature distribution of exhaust gas passing through two types of mixers using a micro turbojet engine were performed to investigate the flow mixing performance based on the shape of the mixer, which mixes the bypass air and core air in a gas turbine turbofan engine. To study the mixing characteristics of the mixer, compressed air was supplied through an external duct mounted on a micro turbojet engine to simulate bypass flow, and a system in which hot gas and compressed air were mixed and ejected into the atmosphere was fabricated. A confluent-type mixer and a mixer with 8-lobed mixer channels in the form of a sine wave were used for the experiment. The exhaust gas temperature was measured based on the distance from the nozzle outlet at bypass ratios of 0.5, 1.0 and 1.4. The results showed that the lobed mixer is more effective than the confluent mixer in lowering the exhaust gas temperature as the bypass ratio increased. Numerical analysis results indicated that, in the case of the confluent mixer, flow mixing is primarily performed by shear flow owing to the velocity difference between the core gas and the bypass air. In contrast, in the case of a lobed mixer, flow mixing is achieved through rotational motion and transverse flow. In addition, when the number of lobe channels increased from 8 to 12, the rotational motion increased and the mixing performance improved. Furthermore, infrared signal calculation results confirmed that, as the number of lobe channels increased, improved flow mixing effectively reduced the infrared signal. We conclude that this study helps understand the mixing characteristics of the flow according to the shape of the mixer at various bypass ratios and determine their effect on the characteristics of the infrared signal.

Increased interest in suffering has given rise to different accounts of what suffering is. This paper focuses the debate between experientialists and non-experientialists about suffering. The former hold that suffering is necessarily experiential—for instance, because it is necessarily unpleasant or painful; the latter deny this—for instance, because one can suffer when and because one’s objective properties are damaged, even if one does not experience this. After surveying how the two accounts fare on a range of issues, the paper presents a decisive argument in favor of experientialism. The central claim is that non-experientialist accounts cannot accommodate cases of suffering that are virtuous and that directly contribute to some objective good.

In the last twenty-five years there have been so many ‘turns’ in how the ancient world is approached that you could be forgiven for wondering whether research has tended to simply spin on the spot rather than move forwards in any decisive or meaningful direction. Amongst other things, and in no particular order, the discipline of archaeology, for instance, has undergone spatial, embodied, digital, mobility, ecological, material, symmetrical, relational, ontological, sensory, posthuman and cognitive turns. The specific theoretical and methodological concepts that underpin these directions can vary considerably, but collectively they reflect a shared concern to foreground the complexities of different types of matter in interpretations of past worlds. Many, although not all, also share interests in combining those material complexities with perspectives on experiences of embodiment and/or forms of ‘being-in-the-world’. Within ancient religious studies, a re-orientation towards the sensory, embodied and experiential is well evidenced across recent scholarship, where it is accompanied by a significant paradigm shift away from top-down models of so-called ‘polis’ or ‘civic’ religion, which stress the organising principles and socio-political aspects of religion, towards a focus on ancient rituals as ‘lived’. Both trends have simultaneously stimulated the need to pay close and critical attention to the role of materials in generating ancient religion not as a set of shared beliefs or practices, but as a collection of dynamic and situational lived experiences emerging from ancient people's mutually constitutive relationships with the world.

This article examines the effectiveness of LGBTQ groups in Congress by looking at voting in favor of bills concerning queer rights. I find that the effect of donations is present in the early period of queer bills before Congress but disappears in bills post-2018. Instead, party is the dominant explanation for votes on bills. This has implications for the strategies that should be employed by LGBTQ+ interests at the national level and implications for how political science should examine the interactions between interest groups and new venues of change.

Let Λ be an artin algebra and $\mathcal{M}$ be an n-cluster tilting subcategory of Λ-mod with $n \geq 2$. From the viewpoint of higher homological algebra, a question that naturally arose in Ebrahimi and Nasr-Isfahani (The completion of d-abelian categories. J. Algebra 645 (2024), 143–163) is when $\mathcal{M}$ induces an n-cluster tilting subcategory of Λ-Mod. In this article, we answer this question and explore its connection to Iyama’s question on the finiteness of n-cluster tilting subcategories of Λ-mod. In fact, our theorem reformulates Iyama’s question in terms of the vanishing of Ext and highlights its relation with the rigidity of filtered colimits of $\mathcal{M}$. Also, we show that ${\rm Add}(\mathcal{M})$ is an n-cluster tilting subcategory of Λ-Mod if and only if ${\rm Add}(\mathcal{M})$ is a maximal n-rigid subcategory of Λ-Mod if and only if $\lbrace X\in \Lambda-{\rm Mod}~|~ {\rm Ext}^i_{\Lambda}(\mathcal{M},X)=0 ~~~ {\rm for ~all}~ 0 \lt i \lt n \rbrace \subseteq {\rm Add}(\mathcal{M})$ if and only if $\mathcal{M}$ is of finite type if and only if ${\rm Ext}_{\Lambda}^1({\underrightarrow{\lim}}\mathcal{M}, {\underrightarrow{\lim}}\mathcal{M})=0$. Moreover, we present several equivalent conditions for Iyama’s question which shows the relation of Iyama’s question with different subjects in representation theory such as purity and covering theory.

This study investigates the barriers that hinder the non-leading Brazilian higher education institutions (HEIs) in repositioning within the digital landscape based on dynamic capabilities. In-depth semi-structured interviews with top managers at six non-leading HEIs show that the main barriers include uncertainty about the traditional HEI future in the digital scenario, lack of strategic tools to reposition the HEIs, lack of knowledge about the cost-benefit of an institution’s digitization, lack of knowledge on how to implement changes, and lack of information on if an HEI should (or not) meet all the new stakeholder needs. These barriers prevent HEIs from successfully adapting to the digital era. Methodologies and tools are required to guide strategic decisions, perform digitization’s cost-benefit analysis, and implement changes that meet stakeholders’ evolving demands. By overcoming these barriers, HEIs can effectively implement dynamic capabilities, transforming the challenges of the digital age into opportunities for growth and innovation.

Fluency, intelligibility, comprehensibility, and accentedness are important dimensions of second language (L2) pronunciation proficiency representing global, listener-based intuitions. This study meta-analyzed 49 reports from 1995 to 2023, examining 141 effect sizes (Pearson r) to understand their relationships and possible moderators. Three-level meta-analysis models showed weighted mean correlations of .82, .75, .62, .57, and .32 for fluency/comprehensibility, comprehensibility/accentedness, fluency/accentedness, intelligibility/comprehensibility, and intelligibility/accentedness, respectively. Task types moderated correlations for fluency/accentedness, intelligibility/comprehensibility, and intelligibility/accentedness, with controlled tasks leading to higher correlations. Ratings of multiple dimensions by the same listeners tended to result in weaker correlations for fluency/comprehensibility and comprehensibility/accentedness. The findings imply that having an accent does not mean being unintelligible and support prioritizing intelligible and comprehensible speech over accent reduction. The study also highlights an over-reliance on first language speaker norms in L2 pronunciation research and advocates for more transparent reporting.

As obesity rates rise globally, addressing modifiable lifestyle factors, such as sleep, presents an opportunity for public health interventions. This review explores the growing evidence linking sleep duration, quality and timing with weight management and dietary behaviours throughout the life course. Observational studies associate short or irregular sleep with increased obesity risk, poor diet quality and metabolic disturbances. Plausible mechanisms include decreased physical activity, heightened hedonic and/or emotional eating, dysregulated appetite signals and circadian misalignment of metabolism, which contribute to a positive energy balance. Unravelling the bidirectional relationship between sleep and weight is challenging; poor sleep exacerbates weight gain, while obesity-related comorbidities such as obstructive sleep apnoea further impair sleep. Despite promising evidence from sleep-restriction studies showing increased energy intake, long-term randomised controlled trials (RCTs) examining interventions designed to improve sleep with weight management as an outcome are lacking. A handful of short-term interventions suggest benefits in reducing energy intake or improving dietary quality, but their effects on weight loss remain inconclusive. This review calls for robust, well-powered RCTs that integrate sleep, diet and physical activity interventions to evaluate the potential of sleep as a core component of obesity prevention and treatment strategies. Currently, there is insufficient evidence to support sleep-focused interventions as a mandatory element in clinical weight-management programmes.

Bycatch, the incidental capture of non-target species in fishing gear, has been recognised as the most significant global conservation threat affecting seabird species. Geographically, bycatch rates vary widely, depending on local fishing efforts, environmental features, and seabird community composition. Regional and local research is essential due to the complexity of accurately extrapolating general conclusions regarding the impacts of bycatch. Existing European bycatch research predominantly focuses on northern regions, leaving a significant knowledge gap regarding bycatch in the Mediterranean Sea. This work presents findings of wintering diving seabirds as bycatch of small-scale fisheries in a coastal area of the northern Adriatic Sea, based on data collected between 2021 and 2023. Seabird distribution varied along the depth profile. The bathymetric range between 3 m and 5 m was the most exploited by fishermen. Bycatch of seabirds was confirmed in the study area, with five species recorded, i.e. Black-necked Grebe Podiceps nigricollis, Red-throated Loon Gavia stellata, Black-throated Loon Gavia arctica, Mediterranean Shag Gulosus aristotelis desmarestii, and Great Crested Grebe Podiceps cristatus. Our results suggest that bathymetry likely plays a strong influence on bycatch occurrence. Incidental captures were not widespread but appeared concentrated in the shallowest depths <5 m and the range <2.5 m was identified as particularly susceptible due to the low associated fishing effort and the majority of bycatch events recorded. We estimate that between 46 and 108 birds were incidentally captured during the research period. This study identifies key factors shaping the areas of bycatch vulnerability and risk, proposing a spatial–temporal mitigation framework within Natura 2000 sites and highlighting the value of local stakeholders’ engagement.

In this note, we formulate a ‘one-sided’ version of Wormald’s differential equation method. In the standard ‘two-sided’ method, one is given a family of random variables that evolve over time and which satisfy some conditions, including a tight estimate of the expected change in each variable over one-time step. These estimates for the expected one-step changes suggest that the variables ought to be close to the solution of a certain system of differential equations, and the standard method concludes that this is indeed the case. We give a result for the case where instead of a tight estimate for each variable’s expected one-step change, we have only an upper bound. Our proof is very simple and is flexible enough that if we instead assume tight estimates on the variables, then we recover the conclusion of the standard differential equation method.

The current emphasis in aerospace component development is on creating safe, reliable and cost-effective technologies. However, the intricate design of stage separation systems renders component reliability a critical factor in determining mission success or failure. One of the technical challenges involves the development of various aerospace mechanisms, such as payload separation, heavy propulsion system separation, ejection of auxiliary components and detachment of rigid components. These stage separation mechanisms commonly employ pyrotechnic devices, which, by their operational nature, impart shock to the spacecraft, potentially causing damage or adverse effects on flight instruments. Therefore, it is imperative to explore multiple viable concepts aimed at reducing shock and experimentally ascertain the impact of shock using diverse shock attenuation techniques. While existing literature primarily addresses shock attenuation with distance from the shock source, limited attention has been given to diminishing shock at the location of the shock-generating element. This study employed various shock-attenuating devices, including dampers, metallic foam structures, viscous materials and dampeners, to assess the effectiveness of shock reduction. Furthermore, the study investigated shock reduction resulting from the elimination of rigid connections, such as bolted joints, from pyro-actuated mechanisms. Through a series of experiments, a conclusive analysis was conducted to determine the approach for achieving a substantial reduction in pyro shock.

In 2003, Ozsváth, Szabó and Rasmussen introduced the $\tau $ invariant for knots, and in 2011, Sarkar [‘Grid diagrams and the Ozsváth–Szabó tau-invariant’, Math. Res. Lett. 18(6) (2011), 1239–1257] published a computational shortcut for the $\tau $ invariant of knots that can be represented by diagonal grid diagrams. Previously, the only knots known to have diagonal grid diagram representations were torus knots. We prove that all such knots are positive knots and we produce an example of a knot with a diagonal grid diagram representation which is not a torus knot.

We discuss, in a non-Archimedean setting, the distribution of the coefficients of L-polynomials of curves of genus g over $\mathbb{F}_q$. Among other results, this allows us to prove that the $\mathbb{Q}$-vector space spanned by such characteristic polynomials has dimension g + 1. We also state a conjecture about the Archimedean distribution of the number of rational points of curves over finite fields.

This work describes the design process of a single-pole double-throw (SPDT) microwave switch operating at Ka-band. It is tailored to a tunable reflective termination design that can be used in tunable power amplifier configurations. A high electron mobility transistor and a resonating network are employed in shunt configuration to enhance the performance in the output port’s active and inactive conditions. The small and large signal measurements showcase a 2 GHz bandwidth with an insertion loss and isolation better than −1.8 dB and −25 dB, respectively, and handling power levels of up to 3 W at 30.5 GHz. The load-pull measurements across the entire Smith chart offer comprehensive insights into the behavior of the SPDT when operating with complex and reactive loads, fulfilling the purpose of tunable reactive termination.

We consider conjugacy classes in a locally compact group G that support finite G-invariant measures. If G is a property (M) extension of an abelian group, in particular, if G is a metabelian group, then any such conjugacy class is relatively compact. As an application, centralisers of lattices in such groups have bounded conjugacy classes. We use the same techniques to obtain results in the case of totally disconnected, locally compact groups.

A growing literature has challenged some of the more influential accounts regarding the role of courts in the development of social and economic policy in the United States. We highlight some of the more durable features of the American federal judiciary that together tend to privilege ideologically conservative outcomes on matters of politics and public policy. Situating the United States in a comparative perspective, we build our argument in three parts. First, we review interdisciplinary accounts documenting how institutional features of US courts—including the unusually strong powers of judicial review—can tilt outcomes in a conservative-leaning direction. Second, we document how these formidable powers interact with judicial selection processes that currently skew the composition of the judiciary in favor of conservative candidates. Third, we show how the combination of the two factors—institutional and compositional—biases federal courts’ interventions toward privileging conservative policy outcomes.

The aim of the study is to examine the avalanche events that occurred in Erzurum Palandöken Ski Resort. Palandöken’s topography makes it vulnerable to avalanches. Avalanches are the rapid and sudden flow of snow masses accumulated on slopes and are considered one of the natural disasters. Several avalanches have occurred on Palandöken Mountain, leading to tragic results. In 1974, six people were buried under an avalanche and rescue teams were injured in a secondary avalanche. In subsequent years, avalanches died four people in 1975, one person in 1976, and eight people on Dragon Peak in 1977. In 2006, one tourist died in an avalanche on Palandöken Mountain. The last avalanche disaster on Palandöken Mountain, which occurred on December 21, 2024, resulted in the death of an athlete from the Kocaeli Judo National Team of the Turkish Olympic Preparation Center. Palandöken, one of Türkiye’s leading winter tourism destinations, hosts international events but faces significant avalanche risks due to its topography. In order to reduce these risks, it is essential to establish avalanche early warning and monitoring systems, provide avalanche safety training for tourists and personnel, and implement infrastructure measures to reduce avalanche hazards.