Building-Integrated Concentrated Photovoltaics (BICPV) is based on Photovoltaic (PV) technology which experience a loss in their electrical efficiency with an increase temperature that may also lead to permanent degradation over time. With global PV installed capacity of 303 GW, nominal 10 °C decrease average could theoretically 15 GW electricity production worldwide. Currently, there gap the research knowledge concerning effectiveness available passive thermal regulation techniques for...

In this paper nanosecond laser machining process was developed to improve the hydrophobicity of AISI 316L stainless steel surface. A geometrical model machined Gaussian micro hole, together with constrain conditions, established for first time predict surface contact angle and optimize structure geometries maximizing its hydrophobicity. The effects processing power pitch microstructures on topography were investigated through experiment. Subsequently, water droplet measured evaluate...

Laser-assisted grinding (LAG) is a promising method for cost-effective machining of hard and brittle materials. Knowledge material removal mechanism attainable surface integrity are crucial to the development this new technique. This paper focusing on application LAG Reaction Bonded (RB)-SiC ceramics investigate mechanism, force ratio specific energy as well workpiece temperature integrity, together with those conventional comparison. Response genetic algorithm were used optimize parameters,...

Machining-process-induced surface texture plays an indispensable role in determining integrity and final functional performance of the machined components. Although there are already many existing standard parameters for quantitatively characterizing surface, accurately describing effectively correlating 3D specific characteristics with relevant performances practice, still not well solved. The inadequacy using 2D single-valued profile non-ubiquity areal industry main obstacles. research...

Abstract In quest of improving the productivity and efficiency manufacturing processes, Artificial Intelligence (AI) is being used extensively for response prediction, model dimensionality reduction, process optimization, monitoring. Though having superior accuracy, AI predictions are unintelligible to end users stakeholders due their opaqueness. Thus, building interpretable inclusive machine learning (ML) models a vital part smart paradigm establish traceability repeatability. The study...

Abstract The aim of this study was to investigate the influence leadership style, whether transactional or transformational, and conflict management mode on online learning performance students in a business‐planning course. Conflict performed using following five approaches: (1) avoidance, (2) accommodation, (3) competition, (4) collaboration (5) compromise. sample used included information from 318 undergraduate enrolled course business planning. data were collected structured...

There is a high demand for bespoke grafts to replace damaged or malformed bone and cartilage tissue. Three-dimensional (3D) printing offers method of fabricating complex anatomical features clinically relevant sizes. However, the construction scaffold replicate hierarchical structure natural tissues remains challenging. This paper reports novel biofabrication that capable creating intricately designed structures anatomically dimensions. The beneficial properties electrospun fibre meshes can...

Periodic nanostructures have been widely used on emerging nano-products such as plasmonic solar cell and nano-optics. However, lack of cost-effective fabrication techniques has become the bottleneck for commercialization these nano-products. In this work, we develop a scale up approach to fabricate high-precision in large area. method, nano-scale single crystal diamond (SCD) tool is produced by focused ion beam (FIB) machining. The nano SCD then further applied cut periodic using...

The ability to predict the grinding force for hard and brittle materials is important optimize control process. However, it a difficult task establish comprehensive model that takes into account fracture, conditions, random distribution of wheel topography. Therefore, this study developed new micro-grinding reaction-bonded silicon carbide (RB-SiC) ceramics. First, components trajectory were analysed based on critical depth rubbing, ploughing, fracture. Afterwards, corresponding individual...

To overcome the precision limitation and environmental impact of current chemical-based production methods for manufacturing silk microfibres used targeted drug delivery, this paper presents a high-precision, scalable, eco-friendly mechanical machining approach to produce such in form discontinuous chips obtained through elliptical vibration turning fibroin film using diamond tool. The length waist width fabricated can be precisely controlled. As each cycle will one microfibre, complete...

Driven by the ever increasing need for high-speed high-accuracy machining of freeform surfaces, interpolators parametric curves become highly desirable, as they can eliminate feedrate and acceleration fluctuation due to discontinuity in first derivatives along linear tool path. The interpolation is essentially an optimization problem, it extremely difficult get time-optimal solution. This paper presents a novel real-time interpolator (RTIPC), which provides near It limits machine dynamics...

Studies on surface wettability have received tremendous interest due to their potential applications in research and industrial processes. One of the strategies tune is modifying topography at micro- nanoscales. In this research, periodic nanostructures were patterned several polymer surfaces by ultra-precision single point diamond turning investigate relationships between topographies nanoscales wettability. This revealed that single-point could be used enhance a variety polymers, including...

This article presents a systematic approach to improve the hydrophobicity of microstructured surfaces. It includes contact angle prediction model for microstructures obtained by nanosecond pulsed laser. Combining with theoretical constraints stable Cassie–Baxter state, this can be used optimize dimensions maximizing surface hydrophobicity. Laser machining experiments were conducted evaluate model. shows that proposed accurately predict and obtain The results also indicate increases decrease...

The health indicators (HIs) were extracted from the current sensor to represent tool wear progression. HIs found poorly correlated with progression of as raw signal was susceptible influence other parts and structures in machine tool. Hence, this paper proposed a novel sensor-based HI that utilized mean inverse hyperbolic cosine function fitted an envelope improve correlation. Using HIs, many bespoke learning (ML) models have been developed by researchers. However, these hyperparameters,...

A total of five ultra-high-performance concrete (UHPC)-strengthened reinforced (RC) columns and one RC column were built subjected to eccentric compression testing examine the force performance UHPC-strengthened eccentrically compressed plain columns. This experimental study examined crack progression, damage morphology, deformation ability, maximum load-carrying capacity, ductile properties It also investigated impacts eccentricity, reinforcement thickness, addition steel fibers on...

Superhydrophobic surfaces have attracted extensive attention over the last few decades. It is mainly due to their capabilities of providing several interesting functions, such as self-cleaning, corrosion resistance, anti-icing and drag reduction. Nanosecond pulsed laser ablation considered a promising technique fabricate superhydrophobic structures. Many pieces research proved that machined surface morphology has significant effect on hydrophobicity specimen. However, quantitative...

This paper aims to develop a laser assisted grinding process capable of manufacturing micro features in high strength materials. A diode with wavelength 808 nm was set on precision machine. Micro grooves were fabricated materials including silicon nitride and aluminium oxide by using the process, i.e. pre-heat workpiece flowed grinding. The experimental results showed that resulted deeper due thermal expansion caused heating. However, machined surface roughness more consistently better than...