This article explores the history of Japan’s municipal electricity regulation. We find that in the early phase of Japanese electrification, rights-of-way and municipal franchises remained undefined compared with these concepts in Western societies. Consequently, Japanese cities started electrification without municipal regulations. Although municipal franchises were introduced to Japan as a regulatory framework in the 1900s, they were tailored to Japan’s political and ideological context. Moreover, the Road Law of 1919 weakened the legal basis for municipal regulation. With the revision of the Electric Utility Law in 1932 and World War II, the decline of municipal regulation became inevitable.

The COVID-19 pandemic has presented multifaceted challenges globally, impacting adolescent health. Among these, food security and nutrition are intertwined closely with mental health outcomes. In Indonesia, with its diverse socio-economic landscape, these interconnections may have been exacerbated by the pandemic. This study investigated the relationship between food security, nutrition and adolescent mental health in Indonesia during COVID-19. Longitudinal data were collected from 511 adolescent boys and girls in 2021–2022 in Gunungkidul district, Yogyakarta. Food security was measured using the Household Food Insecurity Access Scale (HFIAS), and the validated Kessler-10 Psychological Distress Scale (K10) was used to measure adolescent depression. Multivariate linear regression and linear mixed-effects regression were employed to explore associations between these variables, while adjusting for sex, age, pubertal status and household income. Overall, food insecurity score was positively associated with depressive symptoms (β: 0·72, 95 % CI 0·52, 0·92), while BMI z-score was inversely associated (β: −0·31, 95 % CI 0·68, −0·03). We found an increase in strength of association between food insecurity and depressive symptoms over time (moderately food-insecure: β: 1·36 (95 % CI −0·10, 2·83) to 4·63 (95 % CI 2·17, 7·09); severely food-insecure: β: 1·89 (95 % CI 0·36, 3·41) to 3·30 (95 % CI 1·50, 5·10). Enhancing food access, improving nutritional status and providing mental health support are crucial components of adolescent health.

This paper presents a compact broad dual-band rectifier based on a transmission line matching network. This method improves the overall impedance matching performance over two bands, and improves bandwidth of the rectifier’s efficiency. A π-type direct current filter with excellent harmonic suppression performance is proposed. The multi-section transmission line used as the dual-band input impedance matching network is analyzed to achieve an arbitrary frequency ratio. A rectifier is designed and implemented using a three-stage transmission-line matching network. Simulation and experimental results show that a dual-band rectifier is successfully performed with the measured power conversion efficiency (PCE) of 75.7% and 76.3% at 0.915 and 2.45 GHz, respectively. Additionally, the rectifier exhibits bandwidths of 0.48 and 0.25 GHz when the PCE exceeds 70%. Significant enhancement of bandwidth over conventional rectifiers is demonstrated.

This introduction to the ‘Survey and Speculation’ special issue ‘Empire and Cities’ outlines how this collection came about, summarizes the six contributions and draws general conclusions.

Given a Fell bundle $\mathcal {B}=\{B_t\}_{t\in G}$ over a locally compact group G and a closed subgroup $H\subset G,$ we construct quotients $C^{*}_{H\uparrow \mathcal {B}}(\mathcal {B})$ and $C^{*}_{H\uparrow G}(\mathcal {B})$ of the full cross-sectional C*-algebra $C^{*}(\mathcal {B})$ analogous to Exel–Ng’s reduced algebras $C^{*}_{\mathop {\mathrm {r}}}(\mathcal {B})\equiv C^{*}_{\{e\}\uparrow \mathcal {B}}(\mathcal {B})$ and $C^{*}_R(\mathcal {B})\equiv C^{*}_{\{e\}\uparrow G}(\mathcal {B}).$ An absorption principle, similar to Fell’s one, is used to give conditions on $\mathcal {B}$ and H (e.g., G discrete and $\mathcal {B}$ saturated, or H normal) ensuring $C^{*}_{H\uparrow \mathcal {B}}(\mathcal {B})=C^{*}_{H\uparrow G}(\mathcal {B}).$ The tools developed here enable us to show that if the normalizer of H is open in G and $\mathcal {B}_H:=\{B_t\}_{t\in H}$ is the reduction of $\mathcal {B}$ to $H,$ then $C^{*}(\mathcal {B}_H)=C^{*}_{\mathop {\mathrm {r}}}(\mathcal {B}_H)$ if and only if $C^{*}_{H\uparrow \mathcal {B}}(\mathcal {B})=C^{*}_{\mathop {\mathrm {r}}}(\mathcal {B});$ the last identification being implied by $C^{*}(\mathcal {B})=C^{*}_{\mathop {\mathrm {r}}}(\mathcal {B}).$ We also prove that if G is inner amenable and $C^{*}_{\mathop {\mathrm {r}}}(\mathcal {B})\otimes _{\max } C^{*}_{\mathop {\mathrm {r}}}(G)=C^{*}_{\mathop {\mathrm { r}}}(\mathcal {B})\otimes C^{*}_{\mathop {\mathrm {r}}}(G),$ then $C^{*}(\mathcal {B})=C^{*}_{\mathop {\mathrm {r}}}(\mathcal {B}).$

This paper examines the fissures within recent decolonial debates, arguing for the privileging of alternative narratives from formerly colonized groups and a shift away from centring colonialism. It calls for the recognition of decolonial struggles whose histories run deep and the need to link the struggles with indigeneity, its poetics of relations, and connectedness. Therefore, decoloniality requires thinking and doing and paying attention to social and economic well-being of hitherto marginalized indigenous communities, while giving due recognition to their poetics of relationality, reciprocity, and conviviality. Drawing on the example of #RhodesMust Fall movement in South Africa, it raises difficult questions around ownership, agency, while pointing to cracks that this contemporary movement surfaced, in spite of its claim to decoloniality.

China is entering a deeply aging society gradually, and individual pension allocation behavior has a profound impact on the practice and effect of national strategies to actively cope with population aging. This paper constructs a dyad model based on the influence path of social network ties in individual commercial pension insurance purchasing decisions, and then validates the path by building a generalized linear mixed model (GLMM) based on Bayesian approach with the national longitudinal sample data of China. The empirical results show that, firstly, strong ties social interaction (e.g., visiting friend's house) positively influences individuals' commercial pension insurance purchase behavior; secondly, the less the frequency of individual social interaction is, the less significant the positive influence of social interaction on individual commercial pension insurance product purchase is; finally, between 2013 and 2018, the intensity and frequency of social interactions among middle-aged and elderly people in China has been changed dramatically by the shock of the popularity and development of digital social tools. The influence of strong ties social interaction on insurance purchase behavior becomes weaker and weaker, while that of weak ties becomes stronger.

This article examines the Qhapaq Ñan Project in Peru and its unprecedented mobilization of heritage policymaking to foster a participatory approach. The World Heritage listing of the Qhapaq Ñan, or Inca road system, catalyzed a new ethos in the Peruvian cultural heritage sector, reflected in a cohesive set of values and practices centered on community participation. This study analyzes the crafting of a participatory approach within Peruvian national heritage regulations despite legal, technical, and ideological constraints, following the rationales and processes that challenged traditional material-centered paradigms. It focuses on how heritage specialists reimagined their ethical commitments in conceptualizing and implementing this framework. It further demonstrates how participatory practices intersect with official regulations and informal practices within pre-existing technical and normative structures, integrating elements such as benefits, consultation, and collaboration. Therefore, the adoption of the Qhapaq Ñan’s participatory approach is argued not merely as a passive compliance with intergovernmental policy recommendations but as an active assertion of ethical perspectives and practices by heritage specialists.

The challenging tracking control issue for a space manipulator subject to parametric uncertainty and unknown disturbance is addressed in this paper. An observer-based fixed-time terminal sliding mode control methodology is put forward. Firstly, a nonlinear disturbance observer is introduced for exactly reconstructing the lumped uncertainty without requiring any prior knowledge of the lumped uncertainty. Meanwhile, the estimation time’s upper bound is not only irrelevant to the initial estimation error but can be directly predicted in advance via a specific parameter in the observer. Invoking the estimated information, a fast fixed-time tracking controller with strong robustness is designed, where a novel sliding mode surface incorporated enables faster convergence. The globally fixed-time stability of the closed-loop tracking system is rigorously demonstrated through Lyapunov stability analysis. Finally, numerical simulations and comparisons verify the validity and superiority of the suggested controller.

This paper explores the ‘puzzle of the nomads’ in the Metaphysics of Morals: the apparent tension between Kant’s argument about the duty to leave the state of nature and his insistence that European colonizers cannot permissibly force nomads to enter a civil union. Arguing that the puzzle is twofold, I suggest that the answer lies in the relationship between the state and territory in Kant’s work. After showing the shortcomings of an approach which suggests that nomadic peoples cannot enter the civil state without settling, I defend an alternative interpretation, which conceives the territoriality of the state as contingent.

We investigate two findings in Gali and Monacelli (2016, American Economic Review): (i) the effectiveness of labor cost adjustments on employment is much smaller in a currency union and (ii) an increase in wage flexibility often reduces welfare, more likely in an economy that is part of a currency union. First, we introduce a distorted steady state into Gali and Monacelli’s small open economy model, in which employment subsidies making the steady state efficient are not available, and replicate their two findings. Second, an endogenous fiscal policy rule similar to that in Bohn (1998, Quarterly Journal of Economics) is introduced with a government budget constraint in the model. The results suggest that while Gali and Monacelli’s first finding is still applicable, their second finding is not necessarily valid. Therefore, an increase in wage flexibility may reduce welfare loss in an economy that is part of a currency union as long as wage rigidity is sufficiently high. Thus, there is scope to discuss how wage flexibility benefits currency unions.