Alexander V. Savin^1,2, Elena A. Korznikova^3,4, Sergey V. Dmitriev^5,*

CMC-Computers, Materials & Continua, Vol.86, No.2, pp. 1-20, 2026, DOI:10.32604/cmc.2025.072786 - 09 December 2025

Abstract Due to their chiral structure, carbon nanosprings possess unique properties that are promising for nanotechnology applications. The structural transformations of carbon nanosprings in the form of spiral macromolecules derived from planar coronene and kekulene molecules (graphene helicoids and spiral nanoribbons) are analyzed using molecular dynamics simulations. The interatomic interactions are described by a force field including valence bonds, bond angles, torsional and dihedral angles, as well as van der Waals interactions. While the tension/compression of such nanosprings has been analyzed in the literature, this study investigates other modes of deformation, including bending and twisting. Depending… More >

Rekha Phadke¹, Abdul Lateef Haroon Phulara Shaik², Dayanidhi Mohapatra³, Doaa Sami Khafaga^4,*, Eman Abdullah Aldakheel⁴, N. Sathyanarayana⁵

CMC-Computers, Materials & Continua, Vol.86, No.2, pp. 1-26, 2026, DOI:10.32604/cmc.2025.067564 - 09 December 2025

Abstract Recently, the Internet of Things (IoT) technology has been utilized in a wide range of services and applications which significantly transforms digital ecosystems through seamless interconnectivity between various smart devices. Furthermore, the IoT plays a key role in multiple domains, including industrial automation, smart homes, and intelligent transportation systems. However, an increasing number of connected devices presents significant challenges related to efficient resource allocation and system responsiveness. To address these issue, this research proposes a Modified Walrus Optimization Algorithm (MWaOA) for effective resource management in smart IoT systems. In the proposed MWaOA, a crowding process… More >

Jordan L. Mendelson^1,*, Jordan Kassab¹, Phillip Westbrook¹, Katie Yang², Anthony Corcoran¹

Canadian Journal of Urology, Vol.32, No.6, pp. 673-676, 2025, DOI:10.32604/cju.2025.063770 - 30 December 2025

Abstract Stereotactic body radiotherapy (SBRT) for prostate cancer is a generally well-tolerated treatment but can rarely lead to complications such as fistula formation. We report a 69-year-old male on maintenance ibrutinib for chronic lymphocytic leukemia who developed a fistula between his bladder and vas deferens in the setting of ascending scrotal infection. Despite his prior history of SBRT, the fistula was successfully treated with minimally invasive measures. A combination of abscess debridement, urinary diversion, and broad-spectrum antibiotics helped to achieve fistula resolution. The unique presentation described herein highlights the importance of early aggressive intervention for source More >

Rafl M. Kamil¹, Shaik Nyamathulla^1,*, Syed Mahmood^1,2,3,4,*

Journal of Polymer Materials, Vol.42, No.4, pp. 959-992, 2025, DOI:10.32604/jpm.2025.072005 - 26 December 2025

Abstract With the global diabetes epidemic, diabetic foot ulcers (DFUs) have become a major health burden, affecting approximately 18 million people worldwide each year, and account for about 80% of diabetes-related amputations. Five-year mortality among DFU patients approaches 30%, which is comparable to that of many malignancies. Yet despite standard wound care, only about 30%–40% of chronic DFUs achieve complete healing within 12 weeks. This persistent failure shows that conventional dressings remain passive supports. They do not counteract underlying pathologies such as ischemia, prolonged inflammation, and infection. Recent advances in polymeric nanofiber scaffolds, particularly electrospun matrices,… More > Graphic Abstract

U. Anwar^a, N. A. Noor^b, S. Mumtaz^c,*, I. M. Moussad¹

Chalcogenide Letters, Vol.22, No.3, pp. 261-276, 2025, DOI:10.15251/CL.2025.223.261

Abstract The combination of two-step synthesis processes is employed for the fabrication of (NiO)(_0.5)/(Fe₂O₃)(_0.5)@C@MoS₂ (NFCM) nanofibers composite through electrospinning and hydrothermal techniques. This nanofiber composite is designed for tunable dielectric materials and electromagnetic interference (EMI) shielding applications. Using impedance spectroscopy, the electrical properties of an NFCM pellet are analyzed using an equivalent circuit model (R₁1<), with a primary focus on the variation of relaxation time with frequency at different temperatures. Utilizing the Mott. variable range hopping (MVRH) model, and small polaronic hopping model, the localization length of the hoping carriers is determined to be 0.98 Å and More >

S. Saleem^a, U. Parveen^a, H. AL-Ghamdi^b,*, M. Yaseen^a, I. Sajjad^a, Nasarullah^a

Chalcogenide Letters, Vol.22, No.3, pp. 223-237, 2025, DOI:10.15251/CL.2025.223.223

Abstract Present research reveals the doping effect on physical properties of Sr_1-xFe_xS by employing ab-initio calculations. The negative formation energy and optimization outcomes exhibit the stability of the Sr_1-xFe_xS alloys with ferromagnetic phase. Spin dependent band structure (BS) and density of states (DOS) interpret that Sr_1-xFe_xS revealed half metallic ferromagnetic (HMF) nature at 6.25% and 12.5% of Fe doping while metallic character is revealed at 25% concentration of dopant. Spin-up state of Sr_0.9375Fe_0.0625S and Sr_0.8750Fe_0.1250S depicts semiconductive behavior with bandgap value of 2.01/2.33 eV, correspondingly, while metallic in spin-down channel. The magnetism in the system is mainly originated because… More >

T. L. Yang^a, P. Y. Lin^b, Y. S. Fu^c, C. Y. Luo^c, K. C. Hsu^a,*

Chalcogenide Letters, Vol.22, No.7, pp. 625-636, 2025, DOI:10.15251/CL.2025.227.625

Abstract In this study, high-crystallinity zinc sulfide (ZnS) at the nanoscale was synthesized using a combination of electrospinning and hydrothermal techniques. Initially, polyvinyl butyral (PVB)/ZnS composite nanofibers were fabricated via electrospinning. Subsequently, a hydrothermal reaction was employed to induce a dissolution-recrystallization mechanism, enabling the gradual formation of highly crystalline ZnS nanoparticles. The structural, morphological, and compositional characteristics of the ZnS nanoparticles were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS). Finally, the photocatalytic activity of three different ZnS materials—synthesized via electrospinning, hydrothermal treatment, and hydrothermal-assisted electrospinning—were More >

M. Abbas^a, M. Haseeb-u-Rehman^a, M. Sohail^b, G. H. Tariq^a,*

Chalcogenide Letters, Vol.22, No.7, pp. 561-577, 2025, DOI:10.15251/CL.2025.227.561

Abstract This work presents the fabrication of NiO thin films via versatile sol-gel spin coating method and investigation of annealing effects on their physical properties. After the deposition process, the NiO thin films underwent annealing process at different values of temperatures ranging from 200°C to 350°C for one hour duration. XRD patterns confirmed the polycrystalline nature, along the preferred orientations (110) and (101) planes. Nanoparticles in NiO thin films demonstrated an increase in crystallite size with rising annealing temperatures, reaching a maximum size of 49 nm at annealing temperature 300°C. FTIR patterns revealed Ni-O bands at… More >

I. Sajjad^a, U. Parveen¹, H. Al-Ghamdi^b,*, M. Yaseen^a, S. Saleem^a, Nasarullah^a

Chalcogenide Letters, Vol.22, No.9, pp. 829-845, 2025, DOI:10.15251/CL.2025.229.829

Abstract Herein, we employed modified Becke-Johson (mBJ) potential based first principles method to investigate the structural, optoelectronic, and magnetic properties of pure SrS and Ni doped Sr_1-xNi_xS alloys at varying doping concentrations. Formation enthalpy analysis predicts thermodynamical stability of resultant alloys. Geometry optimization was performed in order to optimize the super cells to obtain ground state energy state. After confirming their stability, we investigated their magnetic, electronic, and optical attributes. Pure SrS exhibits an indirect band gap of 3.53 eV (which is in good agreement with experiments), while nickel doping in SrS results in lowering the bandgap… More >

S. Srinivasa senthil, K. Vijayakumar^*

Energy Engineering, Vol.122, No.12, pp. 5149-5173, 2025, DOI:10.32604/ee.2025.070889 - 27 November 2025

Abstract Heating, ventilation, and air conditioning (HVAC) systems contribute substantially to global energy consumption, while rejecting significant amounts of low-grade heat into the environment. This paper presents a non-intrusive spiral-coil heat exchanger designed to recover waste heat from the outdoor condenser of a split-type air conditioner. The system operates externally without altering the existing HVAC configuration, thereby rendering it suitable for retrofitting. Water was circulated as the working fluid at flow rates of 0.028–0.052 kg/s to assess thermal performance. Performance indicators, including the outlet water temperature, heat transfer rate, convective coefficient, and efficiency, were systematically evaluated.… More >