http://nopr.niscpr.res.in/handle/123456789/67733 Fri, 09 Oct 2026 20:32:04 GMT 2026-10-09T20:32:04Z http://nopr.niscpr.res.in/handle/123456789/68408 Title: Variability in Zonal Drift Velocity of Equatorial Plasma Bubbles: A Review Authors: Sarudin, Idahwati; Shazana Abdul Hamid, Nurul; Abdullah, Mardina; M Buhari, Suhaila; Alia Natasha Johari, Nur Abstract: The Equatorial Plasma Bubble is a phenomenon occurring in the F-layer of Earth's ionosphere that can disrupt communication and navigation systems. One key aspect of Equatorial Plasma Bubble under active investigation is its zonal drift velocity, which offers an in-depth understanding of plasma behaviour and the natural dynamics of the F-region ionosphere. Previous studies have examined the variations of zonal drift velocity using various tools, including all-sky imagers and radar equipment. This paper aims to review the fundamental theoretical aspects of zonal drift velocity variability across various techniques. It compares zonal drift velocity dependencies based on the aspects considered, highlighting differences in techniques and approaches used in previous studies. Special emphasis is placed on the observation of zonal drift velocity using high-density Global Positioning System network, as this method has consistently demonstrated high performance compared to earlier techniques. Despite decades of investigation, reported EPB zonal drift velocity (VE) values vary widely across studies which ranging from as low as 0 m/s to over 210 m/s — owing to differences in instrumentation, geographic coverage, and solar activity conditions. A critical gap remains in the systematic crosscomparison of these methods and their accuracy in capturing the full spatiotemporal variability of VE, particularly in the Southeast Asia sector. This review addresses that gap by synthesising findings from over two decades of VE studies, identifying consistent seasonal, local time, and solar activity trends, and evaluating the relative performance of each observational approach. The reviewed literature consistently shows that VE peaks during equinox seasons and high solar activity and decreases from evening (~150–170 m/s) to post-midnight (~20–50 m/s). GPS-based methods using dense receiver networks emerge as the most comprehensive approach, enabling long-term and spatially resolved VE monitoring. Page(s): 383-394 Fri, 01 May 2026 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/68408 2026-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/68407 Title: A Robust Control Framework Using DISMC-KY Converter and Feedforward Fast Decoupled Current Controlled Inverter for Grid Integrated Solar EV Charging Authors: C S, Anjumol; Thekkath, Preethi Abstract: The increasing adoption of Electric Vehicles (EV s) and renewable energy integration has highlighted the need for efficient Photovoltaic (PV)-based EV charging systems with surplus power export capability. However, on the DC side Partial Shading Conditions (PSC) affects Maximum Power Point Tracking (MPPT) performance, while traditional converters introduce high ripple and discontinuous currents, limiting PV energy utilization. On the AC side, conventional inverter control suffers from cross-coupling effects, resulting in poor dynamic response, high THD and reduced grid-code compliance, leading to inefficient EV charging performance. To overcome these limitations, this paper proposes a grid integrated PV-EV charging system employing an Incremental Conductance (InC) MPPT based Double Integral Sliding Mode Controlled (DISMC) KY converter for DC–DC conversion and a Feed-Forward Fast Decoupled Current Control (FF-FDCC) strategy for inverter regulation. The DISMCcontrolled KY converter suppresses chattering, achieves rapid MPPT convergence with negligible steady-state error and thereby enhances power-conversion efficiency, resulting in higher charging current and reduced EV charging time. On the AC side, the FFFDCC strategy eliminates d–q cross coupling effect with minimal sensor dependency. Spectral analysis confirms significant suppression of switching harmonics and conducted EMI, with grid current THD reduction within IEEE limit. The proposed approach enables dynamic reactive power compensation without controller re-tuning. A state-space-based power management scheme enables seamless transition between PV to EV charging mode and grid export mode, maximizing solar energy utilization. Simulation studies and hardware validation confirm accurate MPPT tracking under PSC and robust grid side stability is verified through Lyapunov and Bode plot analyses. Page(s): 395-410 Fri, 01 May 2026 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/68407 2026-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/68406 Title: Physicochemical and Microstructural Stability of Food-Grade Olive Oil Nanoemulsions Prepared by Low-Energy Emulsification Authors: Kumar, Rajeev; Abdul Hussain, Shaik; Sharma, Prateek; R.B Singh, R. Abstract: Olive oil attributes to innumerable health benefits due to presence of minor constituents including triterpenic acids and phenolics, as well as monounsaturated fatty acids (MUFA). Its utilization is limited due to poor aqueous solubility hence it requires an appropriate colloidal delivery system. The formation of oil-in-water nanoemulsion may improve its solubility by producing small size nano droplets with the help emulsion phase inversion approach (low energy emulsification technique). Electrical conductivity and rheological study confirmed phase inversion in the nanoemulsion preparation. A total of 18 nanoemulsion samples were prepared with olive oil at different concentrations (0.5, 1, and 2%), surfactant-oil-ratio (SOR) (1, 2) and mixing speed (500, 1000 and 1500 rpm). All the nanoemulsions were stable to phase separation. Formulation viz. olive oil (2%), SOR 2 and mixing speed of 1500 rpm were obtained as the best optimized condition to produce smallest droplet size and polydispersity index (PDI). The nanoemulsion developed with the optimized formulation was subjected to environmental stress conditions commonly used in food processing operations (heat treatment: 65, 95, 121°C; pH: 1, 3, 7; NaCl concentration: 0.1, 0.5, 1M). Olive oil nanoemulsion was found stable to in these stress environments. Transmission electron microscope (TEM) study observed less increase in the droplet growth during one month storage of nanoemulsion at 4°C indicating better stability of the emulsion during storage. Page(s): 411-419 Fri, 01 May 2026 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/68406 2026-05-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/68405 Title: Bibliometric Analysis of Animal-Inspired Optimization Algorithms in Computer Science and Engineering Authors: Milošević, Marjan; Ristić, Olga Abstract: Animal-inspired optimization algorithms have been widely explored and used in many disciplines. This paper investigates research trends and application patterns of animal-inspired optimization algorithms over a twenty-year period across computer science and engineering-related Web of Science (WoS) database categories. The results are gathered from the Web of Science (WoS) platform and analyzed using WoS-embedded tools and the VOSViewer software. We built a complex query and found over 19000 results. An increasing publication trend is confirmed for the period 2004-2023. The most influential authors and authorship connections are stated. Some very old algorithms (like Ant Colony from 1991) are still used frequently, however the most used in the explored areas is Grey Wolf (from 2014). Also, there are very recent ones such as Harris Hawks (from 2019) and Manta Ray (from 2020) being frequently used in specific engineering sub-areas. The keyword co-occurrence clustering discovered the sub disciplines where animal-inspired algorithms are used. Recently, the proliferation has been indicated in the artificial intelligence field, where animal-inspired optimization is used in hybrid algorithms and techniques. Page(s): 420-432 Fri, 01 May 2026 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/68405 2026-05-01T00:00:00Z