Publications

This study introduces a deformation framework applied to the classical Gaussian map, yielding a q-deformed Gaussian map with enhanced dynamical properties. The analysis focuses on the nonlinear characteristics, bifurcation patterns, and topological entropy of the deformed system. Through analytical methods and visual tools like Lyapunov exponents and bifurcation diagrams, the q-deformed map demonstrates an expanded stability compared to its classical counterpart. Furthermore, to control chaotic dynamics in both classical and deformed Gaussian maps, a two-step feedback control mechanism is implemented. This approach stabilizes unstable periodic orbits and suppresses chaos effectively, as validated through numerical simulations. © 2026 Author(s).

Solid-state sodium-ion batteries (SSIBs) represent an advanced energy storage technology, offering superior safety, thermal stability, and robust long-term cycling performance. However, their practical deployment is critically constrained by the low ionic conductivity of solid electrolytes (SEs) and pronounced interfacial instability—stemming from poor physical contact between the electrode and SE, as well as parasitic reactions involving metallic sodium and liquid electrolyte-based interfacial modifiers. In this work, the development of a composite polymer buffer layer (CPBL) is reported as an interfacial modifier to establish stable and intimate contact at the electrode-SE interface. Integrated into a symmetric full-cell configuration using Fe-doped Na3V2(PO4)3 electrodes and NASICON-type ceramic electrolyte, the SSIB delivers a discharge capacity of ≈45 mAh g−1 (theoretical capacity ≈58.8 mAh g−1) at C/5, with 89% capacity retention over 200 cycles at 25 °C. Notably, the SSIB assembly is carried out in ambient conditions without the need for an inert atmosphere. The enhanced electrochemical performance is attributed to the synergistic effects of improved ionic conductivity and superior interfacial contact, which collectively facilitate efficient Na+ transport across the electrode-SE interface. These findings underscore the potential of CPBL to overcome interfacial challenges in SSIBs and advance the development of safe, high-performance, and sustainable sodium-based energy storage systems. © 2025 Wiley-VCH GmbH.

This review comprehensively examines the synthesis, material characterization, and diverse applications of additively manufactured poly(ether ketone ketone) (PEKK) and its composites. The paper highlights that, through optimized additive manufacturing techniques such as fused filament fabrication (FFF) and selective laser sintering (SLS), PEKK composites can achieve up to 90% of the tensile strength of injection-molded counterparts after post-process annealing. The review details how processing parameters—including nozzle temperature, layer thickness, and build orientation—significantly influence the microstructure, crystallinity, and mechanical behavior of PEKK parts. Incorporation of fillers such as carbon fibers, graphene, and boron carbide further enhances thermal stability, electrical conductivity, and wear resistance, expanding PEKK's suitability for aerospace, biomedical, tribological, and space applications. Notably, PEKK demonstrates exceptional radiation resistance, retaining over 90% mechanical performance after prolonged space exposure, and exhibits high shape recovery ratios (> 90%) in 4D-printed shape memory devices. The review also discusses PEKK's recyclability and circularity potential, as well as current challenges such as achieving consistent filament quality and minimizing porosity. These insights establish PEKK as a versatile, high-performance polymer for advanced engineering and medical applications. © 2025 Society of Plastics Engineers.

Climate change threatens sustainable development, especially in fast-growing economies such as China. This study jointly examines internet penetration (digitalization), green innovation, hydroelectricity consumption, natural resource extraction, and economic growth in shaping China's climate outcomes over 1980–2021. We apply an augmented dynamic ARDL simulation framework and spectral causality tests to a composite climate change score built from eight environmental indicators. Long-run estimates show that a 1 % rise in resource extraction increases the climate score by 0.02 %, while green innovation cuts it by 0.16 % and hydroelectricity by 0.03 %. Short-run responses are directionally consistent: −0.12 % for green innovation and −0.02 % for hydroelectricity. Economic growth and digitalization aggravate climate pressures over time. Robustness diagnostics (alternative specifications and parameter stability checks) affirm these core relationships. Spectral causality reveals that resource extraction, green innovation, and economic growth drive climate outcomes at medium and long horizons, underscoring dynamic feedbacks often missed in single-factor studies. These findings broaden evidence on integrated technology–resource–energy pathways in emerging economies. Policy priority should therefore center on accelerating green innovation, scaling low-carbon power—particularly hydropower—and managing resource extraction to advance mitigation and support Sustainable Development Goal 13: Climate Action. © 2026 The Authors

Prior work on Internet-of-Things (IoT) security often splits between hardware roots of trust and decentralized key management: Physically Unclonable Function (PUF) schemes frequently depend on centralized helper infrastructures, whereas blockchain systems typically lack a hardware seed. We present a unified, protocol-enforced framework that integrates PUFs, blockchain-backed Shamir's Secret Sharing (SSS), and elliptic-curve cryptography (ECC) to remove this gap. Concretely: (i) a Static Monostable PUF with error correction derives device keys without storage, achieving >95% reconstruction success at ≈10% noise; (ii) SSS shares are posted on-chain but re-wrapped every epoch under fresh IND-CPA encryption, eliminating ciphertext staleness and bounding ledger-scraping advantage; and (iii) ECC (Elliptic Curve Cryptography) – including ephemeral Elliptic Curve Diffie–Hellman (ECDH) for forward secrecy and Elliptic Curve Digital Signature Algorithm (ECDSA) for authentication – must rotate each epoch from high-min-entropy PUF material. Our analysis proves hardware-anchored uniqueness, information-theoretic threshold secrecy, and forward secrecy under bounded leakage with non-compounding attacker advantage. We also derive a unified impersonation bound that composes the PUF/ML front-end with the ECC back-end (acceptance probability ≤α+αML+negl(κ)). A duty-cycle/connectivity model shows constant device-resident state (independent of (t,n)), microjoule–millijoule energy per epoch, and graceful PUF-only operation during outages with automatic re-incorporation of on-chain shares upon reconnection. Containerized experiments across domain-specific deployments – secure supply-chain identification, critical-infrastructure control, and healthcare telemetry – demonstrate sub-second end-to-end handshakes under load, with SSS and ECC costs scaling linearly in t and Θ(logp), respectively. These results indicate that enforced rotation plus on-chain ephemerality yields an efficient, scalable, and formally validated tamper-resistant root of trust for next-generation IoT networks. © 2025 Elsevier B.V.