The second-order analysis of Stirling cryocoolers (SC) involves idealistic predictions of the cooling effect and coefficient of performance (COP) using the equation of state, ideal isentropic compression, and isothermal expansions. However, the previous analyses incorporated several unreasonable approximations to aggregate the temperature variations. For example, the temperature variation in a regenerative heat exchanger is expressed as a logarithmic mean of the compressor and expansion tempe...

The classification of brain tumor classes is a crucial task, as handcrafted feature extraction yields limited accuracy. The proposed BrainResMambaVision-18 classifies the tumor into multi-classes of Meningioma, Glioma, and Pituitary tumors to overcome the problem of handcrafted features. BrainResMambaVision-18 leverages long-sequence global dependencies similar to Vision Transformer. The MambaVision uses the weights and biases of finetuned ResNet-18 to capture local features efficiently. The ...

Compact cryocoolers are crucial for applications requiring temperatures as low as 6 K under micro-scale cooling loads. Among various cryocooler types, the Joule-Thomson (JT) cryocooler stands out due to its compactness, zero vibration, and low noise characteristics, making it ideal for sensitive and space-constrained environments. To enhance the miniaturization of such systems, micro-orifice throttle valves are employed to create a significant pressure drop, enabling effective cooling in the ...

This study examines the impact of tracheal stenosis on aerosol particle deposition (1, 5, and 10 μm) in a disease-specific human lung model. A computed tomography scan-based 3D airway model covering generations 0 to 4 (G0-G4) has been developed for a male adult. Two tracheal stenosis severity levels, mild (15%) and extreme (85%), were simulated. The airflow was modeled using the Reynolds-averaged Navier-Stokes (RANS) equations with the shear stress transport (SST) k-ω turbulence model, while ...

This study presents an experimental analysis of charging and discharging characteristics of paraffin wax encapsulated in red sand for thermal energy storage applications. Paraffin wax with a melting temperature range of 45–75 °C was used as the core material because of its non-toxicity, chemical stability, and high latent heat capacity. Red sand, available locally, was chosen as the shell material owing to its low cost and ability to form mechanically stable structures when mixed with water a...

Carbon capture using temperature swing adsorption (TSA) is a promising technology for mitigating CO₂ emissions. The thermal management of the adsorbent bed is critical to the energy efficiency and overall performance of the TSA process. This study presents a computational fluid dynamics (CFD) simulation in COMSOL Multiphysics to compare the performance of two internal heat exchanger designs within a packed bed of Zeolite 13X-APG: a conventional straight-tube heat exchanger and a novel spiral ...

High-temperature environments with elevated heat and humidity present significant challenges to maintaining thermal comfort, particularly during prolonged exposure. This study evaluates hygroscopic cooling fabrics for body part specific thermal regulation under such extreme conditions. A comprehensive numerical model was developed using Laplace transforms to analytically solve transient, coupled heat and moisture transfer equations in a multilayer fabric–skin system. The model incorporates hu...

Thermal energy storage (TES) is crucial for increasing the effectiveness and consistency of renewable energy sources. Among TES methods, using phase change materials (PCMs) for latent heat storage offers significant energy storage capabilities and maintains a nearly constant temperature throughout phase transitions. However, direct application of PCMs suffers from drawbacks including leakage, poor thermal conductivity, and structural instability. Encapsulation techniques have been developed t...

This study delivers a comprehensive numerical assessment of a full-scale infrared suppression (IRS) system characterized by a unique arrangement of four conical funnels organized in a converging-diverging layout. Tailored for aerospace uses, the IRS device operates by capturing surrounding air to reduce the temperature of high-energy exhaust gases, thus decreasing the thermal signature. The research examines vital performance indicators, particularly mass suction and outlet temperature, by al...

Manufacturing industries are leaning towards improving operational efficiency for long-term sustainability. In this context, the readiness of Indian manufacturing industries for sustainable supply chain management (SSCM) is investigated by considering key drivers and barriers. A hybrid approach integrating inter-valued intuitionistic fuzzy decision-making trial and evaluation laboratory (DEMATEL) combined with Random Forest Regression and Shapley Additive Explanation (SHAP) is used to determi...

We report an unusual room temperature giant zero field cooled exchange bias (~1kOe) in an antiferromagnetic (100-x)YBaCuFeO5–ferrimagnetic (x) Ni0.3Zn0.7Fe2O4 composite. Solid state route is adopted to prepare these dilute weight% (x = 1, 3 and 5) ferrite based composites. Incommensurate to commensurate magnetic transition (TN2) of YBaCuFeO5 [1] is shifted to high temperature by 10 K with lowest concentration and indistinguishable in higher concentrations due to magnetic dominance of ferrites...

The importance of Micro Small and Medium Enterprises (MSMEs) in creating livelihood opportunities and fostering socio-economic development is significant, especially in developing economies. Micro and Small enterprises contribute substantially in stirring socio-economic growth in India. However, enterprises do not run in isolation. Their growth enormously depends on ties with other firms and individuals which include interaction, knowledge sharing, access to resources and other factors, toget...

The electronics manufacturing sector in India is undergoing rapid expansion while concurrently facing unpredictable, uncertain, and technologically dynamic circumstances. In these conditions, employees' agility is an essential element for organizations to retain competitiveness. This study examines how high-performance work system (HPWS) improve employee agility by utilizing the mediating mechanism of creative process engagement (CPE), based on the dynamic capability perspective. The study in...

This research examines how anthropomorphic chatbots and reward-based gamification shape consumer behavior toward sustainable products. Across four experimental studies in apparel, electronics, and personal care retail contexts, we find that anthropomorphic (vs. non-anthropomorphic) chatbots enhance brand engagement, which in turn increases willingness to pay for sustainable products. Moreover, combining anthropomorphic chatbots with gamified rewards further amplifies this effect. Our findings...

Multipath Transmission Control Protocol (MPTCP) has emerged as a promising solution to leverage the capabilities of modern heterogeneous networks by enabling simultaneous data transmission across multiple paths. However, efficiently managing congestion control in MPTCP remains a critical challenge due to the need for fairness, stability, and optimal resource utilization. This paper provides a comprehensive analysis of state-of-the-art MPTCP congestion control algorithms with modified BALIA, f...

Recent advancements in electric vehicle (EV) technology have created a strong need for new battery health evaluation techniques that can be integrated into Battery Management Systems (BMS) to provide more accurate predictions. Many existing methods are limited because they perform well only on the specific datasets used for model training. This study presents a more generalizable approach for assessing the health of lithiumion batteries (LiBs). The challenge lies in identifying a set of featu...

Martian dust storms are an intriguing phenomenon that significantly alters the dynamics and thermodynamics of the atmosphere. Through observational and numerical modeling, studies have obtained a comprehensive understanding of the dust storms. This study uses the Landau distribution to analyze several dust storms and investigate the peak, dust availability, duration, etc. As the time series plot of dust variability for dust storms shows a right-skewed distribution, many of their characteristi...

Common Header Pulsating Heat Pipe (CHPHP) is a two-phase passive heat transfer device made by replacing the multiple U-bends of a conventional Pulsating Heat Pipe (PHP). The present CHPHP model consists of ten parallel channels in the adiabatic section and common channels at the evaporator and condenser sections. The flat design at the evaporator and condenser should facilitate a better contact area with the surface to be cooled and heat rejected, thus justifying the design modification. The ...

Gas foil thrust bearings (GFTBs) have a wide range of applications in oil-free turbo machinery due to their advantages such as low maintenance, high speed ability, environmental friendliness, and wide range of temperature adaptability. However, the use of GFTBs is limited due to the low load-carrying capacity (LCC). This study develops a novel GFTB, engraving the straight radial grooves on the top foil surface to enhance the LCC. For numerical simulations, the 2D compressible, isothermal and ...