Renewable energy variability necessitates flexible demand-side management to maintain grid stability. Battery electric vehicles (BEVs) can serve as distributed energy resources through vehicle-to-grid (V2G) technology, yet realizing this potential depends critically on user acceptance of home-based discharging. This study investigates BEV users' preferences for home discharging behavior under V2G conditions, systematically comparing weekday and weekend contexts. Choice-based conjoint experiments were conducted with Japanese BEV owners, incorporating four attributes: discharging time slot, electricity selling price, current state of charge (SoC), and guaranteed minimum SoC. Results indicated that all four attributes influenced discharging decisions, with electricity selling price and time slot as the dominant factors. Weekday preferences were sharply concentrated in late evening and overnight periods, whereas weekend preferences were more evenly distributed. Scenario-based simulations using three identified user segments—Price driven, Balanced, and Time slot driven—showed that combining elevated electricity selling prices with higher current SoC during peak hours (17:00–24:00) raised their relative discharging probability by 47.1% on weekdays and 57.1% on weekends (17.6 and 19.8 percentage points) versus the low incentive case. Separate sensitivity analyses revealed electricity selling price as the primary lever and current SoC as a smaller, directionally consistent complement for shifting discharging preferences toward peak hours, both amplified on weekends across all segments. These findings provide a foundation for designing time-varying, day-type-differentiated, and segment-targeted V2G tariff structures that align user preferences for discharging behavior with grid flexibility needs, helping mitigate supply-demand imbalances from variable renewable energy integration.
This study explores value co-creation and co-destruction across the macro, meso, and micro levels of a service ecosystem by examining the development of Japan's donation system. Although service-dominant logic (SDL) has become a central framework in marketing, its application in public sector ecosystems remains limited. Similarly, some studies have addressed how value co-creation and co-destruction unfold interdependently in the context of an ecosystem. By analyzing the 15-year history of Japan's "hometown tax" donation system, this study reveals how reciprocal gifts, conceptualized as goods, expand the perceived value of donations, while simultaneously creating friction among stakeholders. As local governments sought to attract donations with increasingly appealing reciprocal gifts in the system, the central government viewed these practices as value-destructive, leading to regulatory interventions. The findings illustrate the intertwined relationship between value co-creation and co-destruction, underscoring the importance of institutional design and transformation not only for the diffusion of donation practices but also for the service ecosystem as a whole.
Luminescent trinuclear Au(i) complexes integrated into liquid crystalline (LC) frameworks provide a promising platform for developing anisotropic and stimuli-responsive soft materials. However, simultaneously achieving LC phase stability over a wide temperature range and phosphorescence under ambient conditions remains a challenge. Herein, we employed a combined linker and side-chain engineering strategy to tune the LC behaviour and photophysical properties of pyrazole-based cyclic trinuclear Au(i) complexes. Structural modulation was achieved by introducing flexible alkyl side chains of varying length and branching through ester linkages. The structure-property relationships of the Au(i) complexes were systematically investigated in the context of functional soft material design. The alkyl substituents exerted a pronounced influence on thermal behaviour: alkyl chain branching effectively lowered the melting temperature, while incorporation of ester linkages raised the LC-to-isotropic transition temperature. As a result of this synergistic effect, the complex bearing the longest branched alkyl side chain exhibited an exceptionally wide LC temperature window spanning more than 300 degrees C. In the LC state, all complexes self-assembled into a hexagonal columnar mesophase and displayed aggregation-induced emission behaviour. Alkyl chain substitution did not significantly affect the emission wavelength and excited-state lifetime but markedly enhanced the thermodynamic stability of the complexes. Thus, thermal and LC properties are governed primarily by molecular design, whereas photoluminescence characteristics are dictated by the aggregate structure. These findings highlight linker and side-chain engineering as an effective strategy for independently modulating the liquid crystallinity, thermal stability, and luminescence of Au(i)-based soft luminescent materials.
Developing methods capable of decomposing per- and polyfluoroalkyl substances (PFASs) into fluoride ions under mild conditions would not only help mitigate the global PFAS contamination crisis but also provide a technological foundation for recycling fluorinated materials. Here, we show that zinc sulfide (ZnS) nanocrystals, an inexpensive, low-toxicity, and readily scalable semiconductor, can decompose perfluorooctanesulfonic acid (PFOS), one of the most recalcitrant and strictly regulated PFASs, under both UV and near-visible light-emitting diode (LED) irradiation. Using acetate-capped ZnS nanocrystals, we achieve up to 62% overall defluorination after 24 h of 365 nm light irradiation. Moreover, visible-light-induced photocatalytic defluorination of PFOS was achieved by doping Cu ions into ZnS nanocrystals. Mechanistic studies suggest that both single-photon and higher-order reductive pathways contribute to PFOS defluorination, with transient absorption data being consistent with hydrated-electron formation under UV excitation. A continuous-flow photoreactor using ZnS nanocrystals maintained PFOS removal and measurable defluorination over several days. These results identify ZnS nanocrystals as promising photocatalysts for LED-driven PFAS degradation.
Abstract Belom Bahadat is a philosophy that governs the behavior of the Dayak Ngaju community in Palangka Raya as a guideline for ethics, order, honesty, social solidarity, and wisdom. This research uses a qualitative approach with a single case study through interviews, observations of technology use, and literature review. The research questions highlight how the assimilation of Belom Bahadat with Islam occurs through the rational actions of actors, as well as the influence of technology on cultural decisions and practices. The aim is to analyze the relationship between rational actions, cultural assimilation, and the role of technology. The results show a dynamic assimilation process in accordance with the principles of al-‘ādatu muhakkamah. Findings include the use of prayer alarms, digital Qurans, and digital waqf, as well as negotiations between Islam, Dayak culture, and the Palangka Raya government. The implications of forming rational and religious actors without eliminating the values of Belom Bahadat, enriching the study of the sociology of religion based on local wisdom.
