Range Of Angles Research Articles

A modified multi-angle suture training module for laparoscopic training curriculum on emergency intestinal surgery

BackgroundIntestinal perforation and intestinal obstruction are common emergency surgeries in clinics which often require intestinal resection and anastomosis. Most intestinal anastomosis can be completed by laparoscopy. The wound closure module In the Fundamentals of Laparoscopic Surgery (FLS) program is traditionally used for laparoscopic suture and knotting training. However, many young surgeons tend to focus on practicing suture techniques from certain or a limited range of angles. This narrow approach increases the difficulty of complex suturing and knotting in clinical scenarios such as laparoscopic intestinal anastomosis.MethodsTo address this issue, we designed a multi-angle suture module specifically for suture and knotting training. Thirty-six second-year surgical residents were recruited for the study. Twelve residents were randomly divided at a 1:1 ratio into the traditional suture group and the multi-angle suture group according to their basic laparoscopic surgical ability. After training, they were required to perform laparoscopic end-to-end anastomosis surgery on isolated swine intestines.ResultsThe operation times, goal scores and surgical performance scores of the surgeries were collected and compared. Trainees who used the multi-angle suture training module shortened the operation time (3375.7 ± 1000 s vs. 4678.2 ± 684.7, p = 0.008) and achieved better surgical effects (operation performance score: 8.2 ± 1.5 vs. 6.83 ± 1.3, p = 0.041) in end‒end intestine anastomosis surgery than did those who used the traditional suture training module.ConclusionsThe multi-angle suture training module effectively improved the laparoscopic suture skills of trainees and is therefore a better choice for laparoscopic suture and knotting training before doing laparoscopic intestinal anastomosis.

Shell-Optimized Hybrid Generator for Ocean Wave Energy Harvesting

With the increasing global emphasis on sustainable energy, wave energy has gained recognition as a significant renewable marine resource, drawing substantial research attention. However, the efficient conversion of low-frequency, random, and low-energy wave motion into electrical power remains a considerable challenge. In this study, an advanced hybrid generator design is introduced which enhances wave energy harvesting by optimizing wave–body coupling characteristics and incorporating both a triboelectric nanogenerator (TENG) and an electromagnetic generator (EMG) within the shell. The optimized asymmetric trapezoidal shell (ATS) improves output frequency and energy harvesting efficiency in marine environments. Experimental findings under simulated water wave excitation indicate that the accelerations in the x, y, and z directions for the ATS are 1.9 m·s−2, 0.5 m·s−2, and 1.4 m·s−2, respectively, representing 1.2, 5.5, and 2.3 times those observed in the cubic shell. Under real ocean conditions, a single TENG unit embedded in the ATS achieves a maximum transferred charge of 1.54 μC, a short-circuit current of 103 μA, and an open-circuit voltage of 363 V, surpassing the cubic shell by factors of 1.21, 1.24, and 2.13, respectively. These performance metrics closely align with those obtained under six-degree-of-freedom platform oscillation (0.4 Hz, swing angle range of ±6°), exceeding the results observed in laboratory-simulated waves. Notably, the most probable output frequency of the ATS along the x-axis reaches 0.94 Hz in ocean trials, which is 1.94 times the significant wave frequency of ambient sea waves. The integrated hybrid generator efficiently captures low-quality wave energy to power water quality sensors in marine environments. This study highlights the potential of combining synergistic geometric shell design and generator integration to achieve high-performance wave energy harvesting through improved wave–body coupling.

Chiral flatband in refractive index modulated metasurfaces

Flatband exhibits unique properties, such as slow light effects and a high density of states; incorporating these properties into chiral metasurfaces can significantly enhance chiroptical responses across a range of incident angles. In this study, we establish a theoretical framework to analyze circular dichroism in the presence of broken mirror symmetry along the z-direction. Building on this framework, we employ a theoretical model based on refractive index modulation and partial etching, which lead to a metasurface with a pronounced flatband with chiroptical response. This metasurface holds significant potential for applications in chiral light source emission and detectors, chiral sensing, and enantioseparation, particularly at wide incidence angles.

Total Knee Arthroplasty Design without Cruciates to Achieve Anatomic Femoral-Tibial Motion and Laxity.

Total Knee Arthroplasty Design without Cruciates to Achieve Anatomic Femoral-Tibial Motion and Laxity.

The effects of spatial scales on the in situ photometric analysis of the Chang'e-4 landing region

Visible and near-infrared reflectance spectroscopy is widely used to determine the surface composition and maturity of the Moon, but it may be influenced by the observation geometry. In situ observation is crucial for understanding the angular scattering behaviour of the lunar surface and can help to link laboratory measurements with orbital remote sensing. The Chang’e-4 (CE-4) rover has been exploring on the lunar surface for five years and has collected in situ spectral data covering a wide range of measurement angles. Our aim is to investigate the impact of different spatial scales (from several centimetres to tens of centimetres) on the photometric analysis results of the CE-4 landing region and the phase reddening effects. We constructed four sets of spectrophotometric data with different spatial scales (∼2 cm, ∼5.5 cm, ∼10.5 cm, and ∼15 cm×21 cm) based on the spectral data acquired by the CE-4 imaging spectrometer and employed the Hapke model for photometric inversion analysis. For the four different spatial scales, the derived phase function parameters lie outside the `hockey stick' area and the photometric roughness parameter is smaller than $10^∘$. These parameters show clear variation trends as the spatial scale increases. The reflectance phase curves show a distinct bowl-like shape with a turning point near $90^∘$ of phase angle. The colour ratios (ratios of reflectance at two different wavelengths) manifest significant phase-angle dependence, which may affect the estimation of surface maturity. The colour ratio phase curves exhibit a distinct arch shape when involving visible bands (< 745 nm), whereas it appears as a monotonically increasing pattern when both bands are in the near-infrared wavelength range (R945/R745). Varied spatial scales have no significant effect on the phase curve shape and phase reddening effects, but do influence the photometric parameters derived using the Hapke model. This study could serve as a reference to link the discrepancies between laboratory and orbital research.

Effect of integrated neuromuscular inhibition technique on subjects with neck pain and forward head posture: a randomized controlled trial

ABSTRACT Objective Forward head posture (FHP) and neck pain are common musculoskeletal complaints. This study aimed to evaluate the effect of the Integrated Neuromuscular Inhibition Technique (INIT) on the range of motion (ROM) and craniovertebral angle (CVA) in individuals with FHP and neck pain. Methods A total of 40 physical therapy participants (26 females and 14 males), aged 18 to 23 years (mean age: 20 ± 1.71 years), participated in this study. They were randomized into two groups: Group A received conventional therapy combined with Integrated Neuromuscular Inhibition Technique (INIT) targeting the upper trapezius and suboccipital muscles, while Group B received conventional therapy consisting of strengthening and stretching exercises only. The treatment was administered three times per week for one month. Photographic sessions were conducted using a mobile phone. A Realme 7 Pro camera and CorelDRAW software were employed to analyze the craniovertebral angle (CVA). A pressure algometer was used to measure the pressure pain threshold (PPT), while a visual analogue scale (VAS) was utilized to assess pain severity. Additionally, a clinometer application on an Android device was used to evaluate cervical range of motion (ROM). Results Both groups demonstrated significant improvements in craniovertebral angle (CVA) and visual analogue scale (VAS) scores, with Group A showing a 16.12% improvement in CVA and a 75.61% reduction in VAS, compared to a 7.20% improvement in CVA and a 57.14% reduction in VAS in Group B. Group A also showed a significantly greater post-treatment increase in CVA (p = 0.01), cervical range of motion (ROM) for flexion (p = 0.002), extension (p = 0.005), right bending (p = 0.001), left bending (p = 0.001), right rotation (p = 0.001), and left rotation (p = 0.001). Additionally, Group A exhibited a significantly greater decrease in VAS (p = 0.003) compared to Group B following treatment. Conclusion The Integrated Neuromuscular Inhibition (INI) technique, which combines ischemic compression, strain-counterstrain, and muscle energy techniques, yields superior outcomes compared to conventional therapy alone for individuals with forward head posture (FHP) and neck pain. It is particularly effective in improving craniovertebral angle (CVA), reducing pain levels, and enhancing cervical range of motion (ROM).

Salvinia-Effect-Inspired Magneto-Responsive Superhydrophobic Surfaces with Cluster-Distributed Microcilia Array.

Inspired by the "Salvinia effect", a novel method for fabricating a magneto-responsive superhydrophobic surface coated with a cluster-distributed cilia array (CC-MRSS) was reported. This surface features a magnetically self-assembled nonuniform microcilia array and demonstrates exceptional microdroplet hydrophobicity, magnetic-responsive wettability, and corrosion resistance. The fabrication process involved mixing polydimethylsiloxane (PDMS) and carbonyl iron powders (CIPs), followed by dividing the mixture into two parts. The first part was poured into a 3D-printed female mold to form an elastic substrate with a hemispherical array. The second part was sprayed onto the substrate by using the air spray method. When an external magnetic field was applied during curing, a dense microcilia array self-assembled on the hemispheres of the substrate. As a result, the CC-MRSS, with a two-level composite microstructure, was successfully prepared. Contact angle tests showed a static contact angle of 157.0° for an 8 μL water droplet. Multiple samples were tested for controllable hydrophobicity by varying the spraying volume and CIP weight fraction. The relationship between wettability and the external magnetic field was analyzed, and a magneto-elastic coupling theory was developed to explain the contact angle variation. An optimal parameter scheme was proposed to achieve the maximum magneto-responsive contact angle range. The optimized CC-MRSS can switch between a low-hydrophobic state (118.2°) and a superhydrophobic state (151.5°) upon magnetic field switching, with high repeatability over ten cycles. Notably, the Salvinia-inspired CC-MRSS maintains an air film underwater, just like the Salvinia leaf, reducing surface-solution contact and offering superior corrosion resistance over other magnetic ciliary array surface materials.

A Thermally Controlled Ultra-Wideband Wide Incident Angle Metamaterial Absorber with Switchable Transmission at the THz Band.

We demonstrate a thermally controlled ultra-wideband wide incident angle metamaterial absorber with switchable transmission at the THz band in this paper. The underlying hybrid structure of FSS-VO2 thin films make them switchable between absorption mode and transmission mode by controlling the temperature. It can achieve ultra-wideband absorption with above 90% absorption from 1 THz to 10 THz and exhibits excellent absorption performance under a wide range of incident and polarization angles at a high temperature (80 °C). At room temperature (27 °C), it acts in transmission mode with a transmission coefficient of up to 60% at 3.1278 THz. The transmission region is inside the absorption band, which is very important for practical applications. The metamaterial absorber has the advantage of easy fabrication, an ultra-wideband, a wide incident angle, switchable multi-functions, and passivity with wide application prospects on terahertz communication and radar devices.

An Extended Height‐Function Method for 3D VOF Simulations of Wetting Phenomena on Super‐Hydrophilic and Hydrophobic Surfaces

ABSTRACTAn extended height‐function (HF) method that can be consistently utilized for 3D volume of fluid (VOF) simulations of wetting phenomena on super‐hydrophilic and super‐hydrophobic surfaces, is proposed. First, the standard HF method is briefly explained. Then, 2D and 3D HF methods that reflect the contact angles reported so far are described, with their limitations discussed. Finally, specific treatments of contact line identification and HF construction reflecting the contact angle boundary condition, required to overcome such limitations, are presented in detail. Numerical tests for a sessile droplet reveal that the contact line identification and HF construction are conducted appropriately with respect to the imposed contact angles ranging from to in the proposed numerical scheme. Additionally, the present method shows approximately first‐ or second‐order convergence of the curvature at the contact line for a wide range of contact angles. Moreover, simulations of droplet spreading driven by surface tension reveal that the proposed method can reasonably reproduce the behavior of a droplet reaching an equilibrium state defined by an imposed contact angle.

Gold Nanocone Array with Wide Angles and High Absorptivity for Light Absorber

Nanocone arrays are promising candidates for broadband light absorption owing to their graded refractive index and multiwavelength resonance mechanisms. However, the bidirectional reflection distribution function (BRDF) and wide‐angle performance of plasmonic nanocones remain insufficiently explored. Herein, a gold nanocone array fabricated with the ion track method is reported, achieving exceptional light absorptivity (>0.98) across a wide incidence angle range (5°–75°). Combining finite‐difference time‐domain simulations and experimental BRDF measurement, it is revealed that nonspecular scattering governs the reflection behavior and exhibits excellent Lambertian properties. This study provides critical insights into the design of plasmonic absorbers for solar energy harvesting and optical sensing technologies.

Misalignment in Mechanical Interlocking Heterogeneous Integration: Emergent Behavior and Geometry Optimization

This paper addresses the challenge of misalignment in cantilever-based mechanical interlocking structures used for the heterogeneous integration of integrated circuits (ICs). As IC applications expand into flexible and multi-functional platforms, precise alignment becomes critical to maintaining optimal mechanical and electrical performance. We investigate the effects of X and Y misalignment on snap-through forces in cantilever arrays, focusing on their impact on mechanical integrity. The experimental results demonstrate that for X-axis misalignments below 15%, the increase in the required snap-through force is less than 5%. In contrast, Y-axis misalignment shows an even more negligible impact, with less than a 5% reduction in force for up to 20% misalignment. Additionally, through polynomial fits of the model across a range of cantilever angles, this study provides a design template for future exploration of cantilever interactions using nonlinear mechanics while minimizing computational load. These findings offer valuable insights for optimizing misalignment tolerance and improving the design of interlocking structures for IC integration, contributing to the development of robust systems for next-generation IC devices.

Atomistic theory of twist-angle dependent intralayer and interlayer exciton properties in twisted bilayer materials

Twisted bilayers of two-dimensional materials have emerged as a highly tunable platform to study and engineer properties of excitons. However, the atomistic description of these properties has remained a significant challenge as a consequence of the large unit cells of the emergent moiré superlattices. To address this problem, we introduce an efficient atomistic quantum-mechanical approach to solve the Bethe–Salpeter equation that exploits the localization of atomic Wannier functions. We then use this approach to study intra- and interlayer excitons in twisted WS2/WSe2 at a range of twist angles. In agreement with experiment, we find that the optical spectrum exhibits three low-energy peaks for twist angles smaller than 2∘. The energy splitting between the peaks is described accurately. We also find two low-energy interlayer excitons with weak oscillator strengths. Our approach opens up new opportunities for the atomistic design of light-matter interactions in ultrathin materials.

Prevalence of osteoporosis in patients with knee osteoarthritis awaiting total knee arthroplasty is similar to that in the general population

BackgroundOsteoporosis is common in patients with knee osteoarthritis (KOA) awaiting total knee arthroplasty (TKA) and varies in different regional and ethnic. However, it is unclear whether the prevalence of osteoporosis and osteopenia in these patients is different from that in the general population. This study aims to investigate the prevalence of osteoporosis and osteopenia in both populations to help exploring the relationship between the osteoporosis and osteoarthritis, and to explore whether knee function and radiological assessments of KOA are associated with osteoporosis.MethodsIn total, 249 patients diagnosed with KOA awaiting TKA were investigated in this cross-sectional study. The mean age was 70.9 ± 6.4 years. Bone mineral density (BMD) and T scores at the hip and lumbar spine were used to assess bone status using dual X-ray absorptiometry. A matched cohort from 2448 individuals in the Health Examination Center of our hospital was set as controls by matching sex, age (± 3.0 years) and BMI (± 1.0). The Kellgren-Lawrence grades (K-L grades), mechanical femorotibial angle (mFTA), Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) score and range of motion (ROM) of the knee were measured to evaluate radiological assessments and knee function in patients awaiting TKA and used to explore the association between KOA and BMD or T score. Prevalence of osteoporosis and osteopenia were investigated in the two cohorts, and inferential statistical analyses were undertaken. The chi-squared test or Fisher’s exact test was used for categorical variables while comparisons of scores were examined by ANOVA with/without Bonferroni correction or the Kruskal‒Wallis test.ResultsThe prevalence of osteoporosis and osteopenia in patients awaiting TKA was 30.5% (76/249) and 44.2% (110/249), respectively. In the matched cohort, 72/249 (28.9%) had osteoporosis, while 98/249 (39.4%) had osteopenia. There was no significant difference in the prevalence of osteoporosis or osteopenia between the two groups (χ2 = 2.603, P = 0.272). mFTA was significantly correlated with BMD and T score (P < 0.05), while no correlation was found between K-L grade, ROM or WOMAC and BMD or T score (P > 0.05).ConclusionsThe prevalence of osteoporosis in patients awaiting TKA was similar to that in the general population. BMD and T score were not correlated with WOMAC score or K-L grade but were correlated with mFTA.

Wind Turbine Stall‐Induced Aeroelastic Instability Mitigation Using Vortex Generators

ABSTRACTInspired by Vortex Generators' success in delaying airfoil stall, this study explores the potential of using Vortex Generators to mitigate stall‐induced instability in floating offshore wind turbines at parked and skewed inflow conditions for the first time. Significant improvements are achieved by strategically installing Vortex Generators in the outboard sections of turbine blades and optimizing their parameters (normalized height, length, inflow angle, and chordwise positions) using the particle swarm optimization algorithm and fast optimization method. Numerical results, including both linear and nonlinear stall instability analyses, consistently demonstrate that Vortex Generator arrays effectively mitigate stall‐induced instability in the edgewise motion of wind turbines. The yaw misalignment angle range corresponding to the occurrence of edgewise instability is reduced by 29.69% (for NREL 5 MW wind turbine) and 22.95% (for IEA 15 MW wind turbine) while also decreasing limit cycle oscillation amplitudes. Additionally, azimuth angle does not influence optimization results, and implementing Vortex Generators can increase the onset wind speed of stall‐induced instability without negatively affecting operating conditions.

Magnetic anisotropy investigation of grain-oriented electrical steels for a wide range of temperatures

Grain oriented electrical steel (GOES) has the advantages of high permeability, low iron loss and high saturation flux density in the rolling direction (RD). In practical, the magnetic field is not ideally in the direction of RD when the GOES is really operating. Therefore, a comprehensive insight into the magnetic anisotropy of GOES can help researchers to better utilize GOES. In addition, energy losses in electrical equipment and ambient temperatures can cause GOES to operate over a variable temperature. In order to design electrical equipment precisely, it is necessary to investigate the effect of temperature on the magnetic anisotropy of GOES. In this paper, the magnetic properties of GOES such as magnetic flux density, specific core loss, permeability, etc. are investigated at different temperatures and magnetization angles by experimental and theoretical analysis. The results show that the temperature has a significant effect on the magnetic anisotropy of GOES. The increase of temperature will increase the magnetic flux density and permeability in the unsaturated state, which is the most obvious in the range of easy magnetization angle. In the saturated state, an increase in temperature causes a decrease in flux density and permeability at the easy magnetization angle, i.e., in the range of 0°–30°, and the opposite law occurs at the difficult magnetization angle, i.e., in the range of 50°–70°. Similar to the properties of non-grain oriented electrical steel, an increase in temperature causes a decrease in iron loss, and their pattern of change is minor in relation to the magnetic anisotropy, and the reason for the decrease is the hysteresis loss and eddy current loss reduction. This paper reveals the relationship between magnetic anisotropy and temperature, and proves that the sensitivity of magnetic flux density and permeability to temperature is related to magnetization. The research content is not only of great significance to the cognition of material properties, but also can guide the design and performance prediction of electrical equipment.

In vivo assessment of shear modulus along the fibers of pennate muscle during passive lengthening and contraction using steered ultrasound push beams.

Ultrasound shear wave elastography (SWE) has emerged as a promising non-invasive method for muscle evaluation by assessing the propagation velocity of an induced shear wavefront. In skeletal muscles, the propagation of shear waves is complex, depending not only on the mechanical and acoustic properties of the tissue but also upon its geometry. This study aimed to comprehensively investigate the influence of muscle pennation angle on the shear wave propagation, which is directly related to the shear modulus. A novel elastography method based on steered pushing beams (SPB) was used to assess the shear modulus along the fibers of the gastrocnemius medialis (pennate) muscle in twenty healthy volunteers. Ultrasound scans were performed during passive muscle lengthening (n=10) and submaximal isometric contractions (n=10). The shear modulus along the fibers was compared to the apparent shear modulus, as commonly assessed along the muscle shortening direction using conventional SWE sequences. The shear modulus along the muscle fibers was significantly greater than the apparent shear modulus for passive dorsiflexion angles, while not significantly different throughout the range of plantar flexion angles (i.e., under any or very low tensile loads). The concomitant decrease in pennation angle along with the gradual increase in the shear modulus difference between the two methods as the muscle lengthens, strongly indicates that non-linear elasticity exerts a greater influence on wave propagation than muscle geometry. In addition, significant differences between methods were found across all submaximal contractions, with both shear modulus along the fibers and the pennation angle increasing with the contraction intensity. Specifically, incremental contraction intensity led to a greater bias than passive lengthening, which could be partly explained by distinct changes in pennation angle. Overall, the new SPB sequence provides a rapid and integrated geometrical correction of shear modulus quantification in pennate muscles, thereby eliminating the necessity for specialized systems to align the ultrasound transducer array with the fiber's orientation. We believe that this will contribute for improving the accuracy of SWE in biomechanical and clinical settings.

Suppression mechanism of porous media coatings on wavefront steepness behaviors inside high-speed maglev tunnels

The initial wavefront triggered by the entry of maglev trains into tunnels continues to steepen nonlinearly during its propagation. The micro-pressure waves (MPW) released as the initial wavefront propagates to the tunnel exit can induce sonic booms and cause building structures resonance. This study proposes porous media coatings (PMC) installed on the tunnel to alter the propagation characteristics of the initial wavefront. The effects of porosity and geometric parameters of the PMC on the wavefront propagation characteristics are discussed. The research reveals that as the porosity, thickness, coverage angle, and streamwise range of the PMC increase, the friction effect is enhanced accordingly. By intensifying the friction effect, the PMC can continuously reduce the wavefront gradient magnitude and increase the wavefront thickness. The maximum reductions in wavefront gradient magnitude and MPW amplitude are 77.7% and 66.3%, respectively. The PMC transforms the MPW profile from triangular waveforms to Gaussian-shaped waveforms, extending its duration by 33.3%. Additionally, the acoustic Reynolds number is proposed as the criterion to assess whether the wavefront steepens or spreads during propagation. A critical acoustic Reynolds number (Rea) of 60 is identified, where wavefronts with Rea greater than 60 steepen during propagation, and vice versa. This study confirms the inhibitory mechanism of the PMC on wavefront steepening, even causing it to gradually spread. The findings provide significant insights for the future design of maglev tunnels.

Triangular and semi-circular serrations in raked winglets: Numerical analysis of vortex dynamics and drag control

The present study explores the aerodynamic performance of serrated raked winglets (SRWs) through detailed computational fluid dynamics analysis, focusing on drag reduction, lift enhancement, and overall efficiency improvements. Utilizing the National Advisory Committee for Aeronautics (NACA) 653218 airfoil, simulations were conducted across a range of angle of attack using a realizable k–ε turbulence model. The study investigates the impact of key parameters, such as serration geometry, count, and spanwise placement on the aerodynamic characteristics. Results reveal that SRWs outperform conventional and raked winglet designs, achieving up to a 14.5% improvement in the lift-to-drag ratio (L/D) at higher angles of attack, with a 15% reduction in drag compared to a conventional wing. The incorporation of serrations was found to effectively minimize wingtip vortex intensity and turbulence, contributing to enhanced flow stability and reduced energy losses. A comparative analysis of triangular and semi-circular serrations highlights the superior vortex suppression capabilities of triangular designs, particularly when positioned near the wingtip, leading to a 6% higher L/D ratio than semi-circular configurations. These findings underscore the potential of SRWs as a transformative wingtip device for optimizing aircraft aerodynamic performance and fuel efficiency, offering valuable insight for future experimental and computational studies in advanced winglet design.

Achieving Broadband RCS Reduction on Curved Surfaces through Gradient Unit Design and Partition Layout Strategy

Achieving Broadband RCS Reduction on Curved Surfaces through Gradient Unit Design and Partition Layout Strategy

Near infrared thermal emitter based on nano scale grating metamaterial for thermo photovoltaic power generation

Abstract Nonrenewable fossil fuels constitute the main source of energy for energy consumption worldwide. Therefore, new technologies are needed to capture energy from alternate sources before fossil fuel runs out. In this work, we designed a nanostructured grating for selective emitters made of tungsten/molybdenum ground film with a hafnium dioxide spacer that is used for thermophotovoltaic energy conversion. To achieve high spectral efficiency, several geometric parameters, including the grating height, dielectric thickness, and incident angle, were optimized, while all the remaining parameters remained fixed. The numerical simulation demonstrated that the mean emittance of the emitter reached 94% for the W-AlN-W structure in the wavelength range of 0.3 − 2.2 μm at normal incidence and 93% for the Mo-AlN-Mo structure in the wavelength range of 0.3 − 2.0 μm at normal incidence. Moreover, the nanostructured grating emitters with InGaAs band gaps of 0.55 eV and 0.62 eV at 1600 K attained 87% and 87.5% spectral efficiency, respectively. Furthermore, the designed metamaterial emitter was polarization independent and exhibited good emissivity over a wide range of incidence angles, from 0° to 75°. Surface plasmon polaritons, magnetic polaritons, and intrinsic metals show significant absorption at the cutoff wavelength. High mean emittance, polarization independence, easy fabrication, cost effectiveness, high spectral efficiency, and thermal stability are considered the most desirable elements of this work.