New Trends in Physical Science Research Vol. 7

The current vibro-acoustic model of a satellite is by either the intense computationally finite element (FE) method or low precisely statistical energy analysis (SEA) method. In this paper, a combined vibro-acoustic simulation of a satellite was proposed, in which division frequency, damping loss factor (DLF) model and on-board equipment modelling are three key technologies. Division frequency (f₁) is decided according to whether modes of components are over 5 when f>f₁. Hybrid FE/SEA method is recommended when f\(\leq\)f₁ with only solar arrays by SEA method and the other components by FE method, and all the components are preferred by SEA method when f>f₁. The DLF model of components was put forward based on the analysis of many experimental data, in which the DLF is negative to the area-to-mass ratio of components and frequency. Based on the SEA theory, it is proved that the on-board equipment can be simulated by the equivalent DLF of the panel. The combined method not only reduces over 80% calculation time compared with the FE method in the entire band, but also controls the prediction error within 1dB.

Piezoresponse force microscope imaging, scanning electron microscopy, powder X-rays, infrared spectroscopy, and computer simulations were used to investigate the alginate biopolymer from Tropicalgin C302245. In the out of plane mode, local piezoresponse force microscopy images reveal probable ferroelectric zones, which are validated by second harmonic generation analysis. Diatom frustules with a cristobalite-like substance, amorphous silica, and chitin make up alginate powder. The experimental results are explained by MM+ and PM3 computer simulations, which show that alginate molecule self-assembly increases the molecular collective dipole moment, enhancing polarization. Preliminary free radical calculations suggest less thermodynamic stability in alginate biopolymer decreasing hydrogen bonding thus, decreasing ferroelectric properties. Alginate molecular properties might open possibilities for organic green technological applications.

We have performed the first-principles method to investigate the structural and electronic properties of GaAs_1-xN_x and GaAs_1-xBi_x ternary semiconductor alloy to determine the effect of Nitrogen (N) and Bismuth (Bi) on GaAs semiconductor. Within the Generalized Gradient Approximations and Local Density Approximations, we used Density Functional Theory and the pseudopotential approach. For GaAsN and GaAsBi alloys, the Zinc-Blende phase has been found to be stable. The effects of Bismuth content in GaAsBi alloys and Nitrogen concentration in GaAsN alloys on bending parameters are investigated in this work. The bandgap energies for all x concentrations (0 < x < 1)  and the lattice constant of both alloys were calculated using the bending parameter of GaAsBi and GaAsN alloys, which are important for a wide range of device applications. Theoretical and experimental works for the researched materials are compared to lattice characteristics and band gap energies.

Anesthesiologists supervise and conduct the administration of various anaesthetic agents including volatile liquids and gases through various delivery systems to the patient for safe anaesthesia outcome. These gases and liquids can behave differently under different atmospheric conditions. Also, physics associated with delivery or safety instruments should also be properly understood by an anesthesiologist. As, no device is fail proof and in case of failure of device, this knowledge can greatly help in troubleshoot problem. This knowledge can also save lives in emergency situation by preventing hypoxic gas delivery. Therefore, physics related to various substances used by anesthesiologist should be studied in great detail.

The unique impact of acoustic waves on living creatures is investigated in this article. The study's goals are mechanical features of living bodies. The most critical resonance frequencies of human organs are known to be in the range of 0.5-20 Hz. And protection against harmful acoustic waves on the human body may be limited to people who are in an acoustic environment with a frequency that is not the same as their resonance frequency. We can, on the other hand, use the influence of acoustic fields on plant pest organisms at a frequency that corresponds to the resonance frequency of the pests' bodies. The acoustic field will then have a lethal effect on the plant pest. The Colorado beetle died in the laboratory as a result of vibratory oscillation and acoustic vibrations. The method and the gadget that will be used to implement it were created and are explained below. By manipulating the Colorado beetle's body using acoustic vibrations, the complexity of the process is reduced while toxicity is avoided.

In this work, polyvinyl alcohol (PVA) is prepare by casting technique, it is doped with different weights of Methyl blue (MB). Fourier transforms infrared spectroscopy (FTIR) analysis shows the peaks become intensity and shifting wave number. Atomic force microscopy images show decreasing in grain size from 141.72 to 72.32 nm, the measured Hardness by an alternate new method using laser spot calculations shows increased harness about  7 times from (29 to 202) N/cm² .

The goal of this study is to show fixed point theorems in the framework of dislocated quasi b-metric spaces for a self-map meeting specific contraction conditions involving quadratic terms. These findings are also applied to a pair of weakly compatible self-maps. As a result, we deduce application to a differential equation and suitable examples are also furnished in support of our results. Our findings unify and enrich the comparable results in the literature.

The purpose of this mini-review was to look at the impact of clothes covering different skin locations between the extremities and the torso on variations in body core temperature during exercise. How much does hand vasodilation help with heat loss from the extremities and garment thermal comfort while exercising?In experiment 1, seven subjects exercised on a bicycle ergometer at a Ta of 30⁰C. Subjects wore two different types of clothing: A, designed to expose upper extremities and B, designed to expose the torso, covered identically 71% skin of body surface area. T_re increased to 37.88 ⁰C in clothing A and to 38.14⁰C in clothing B at the end of  exercise, respectively. The findings clearly demonstrated that the upper extremities are more efficient in dissipating heat from the body than the torso. In experiment 2, seven subjects exercised for 25 minutes and then rested for 20 minutes at a Ta of 20.0⁰C. In OCCL, both wrists were occluded with a cuff for 30 minutes to stop hand blood flow. In CONT, the wrists were not occluded, finger T_sk increased from 20.5⁰C to 34.0⁰C, and forearm T_sk increased concomitantly from 25.4⁰C to 27.7⁰C during and after exercise. In OCCL, however, T_sks in the finger and forearm did not increase at all during wrist occlusion. Despite of a compensatory increase in thermo-physiological responses, T_es was significantly higher in OCCL than in CONT. We found that hand vasodilation is critical for increasing heat dissipation from the upper extremities, inhibiting body core temperature rise and improving clothing thermal comfort under heat load.

Present study highlights the Faraday effect use a magnetic field, this effect is clearly a appear through of the results. The optical properties test without magnetic field is appear the absorptance is direct proportionality with the concentration, while find the anther optical properties is inversely proportionality. Many electro-optic systems rely on the faraday effect as their foundation, which gives metal nanoparticles (NPs) and ferromagnetic (FM) polymers relevance in nanostructures.

Introduction: Many traffic accidents are caused by driver-related errors, with cognitive ability being the most important direct cause. Since not all drivers are dangerous (accident-prone), the most effective method to prevent accidents is to detect a “dangerous” driver, which is, driver in weak cognitive ability before a traffic accident occurs and to what extent weak in his cognitive ability during driving. This study is intended to detect drivers’ inherent cognitive styles as the primary cause of traffic accidents.

Method: This study utilized a web questionnaire survey [1] to collect examples of both traffic accidents and near misses that occured during ordinary driving, classifying participants into three cognitive style of E-S types (Type E, B, and S) with Empathizing-Systemizing (E-S) model and its Empathy Quotient (EQ) and Systemizing Quotient (SQ) scales as indices of cognitive traits to detect the relationship between traffic accidents/near misses experienced in the past.

Results: The outcomes allowed us to discriminate between a "safe" driver, Type E, and a "dangerous" driver, Type S, who scored highest for the number of near misses. We could identify those differences and measure in terms of driver’s visual attention capability (gaze response speed) under the driving simulation environment incorporating with the rUFOV method [2].

Conclusion: The potential of weak cognition style can be detected in advance of driving with E-S type, and to measure “degree of accident-proneness” in advance of driving, since not all drivers are equally “dangerous”. Then, we propose that the E-S model can be incorporated into the driver aptitude test (before a licence provision).

The main purpose of this work is to give an overview of a gravity theory which has attracted a lot of physicists’ attention in the last decades, namely metric-affine gravity. We analyse a well-known expression in the literature for the Lie derivative of the metric in the case of metric-affine approach and discuss its consequences. There is also a historical analysis of this theory, which includes its most important findings.  One comes to the conclusion with some viewpoints on the calculation of topological observables in that theory, which is viewed as topological gravity theory.  

Using a time evolution equation of the single-particle distribution, we propose an alternate method for obtaining time evolution equations for hydrodynamic local variables such as density, velocity fields, and kinetic energy. We venture to suggest that our time evolution equations cover both problems of the Boltzmann equation and the Navier-Stokes equation. Our time evolution equations may well be a useful alternative to these two formulations. Indeed it would be very productive if numerous applications of the old Boltzmann equation and Navier-Stokes equation are reformulated with our time evolution approach. It is proposed that the prescription will have numerous applications in hydrodynamics, including solutions to the Navier-Stokes equation, when applied to various pairing potentials between monoatoms, geometry, and initial data.

Relative motion is redefined under the real-time analysis of universe by introducing use of imaginary velocity. Among inherent discrepancies in relative motion unraveled by the author, the one underlines, how the transfer of a real magnitude of an object to the opposite velocity of the other object is justified in two dimensional motion. Quite noticeable is that imaginary velocity gives correct values of relative velocities as the transfer of magnitude is imaginary and not real (refer 1.2). Hence, the new transformation laws [1] are obtained named as “jk”, denoting two constants, signifying the difference with the inverse law of Lorentz. In an isotropic universe, it is discovered that each frame holds references for its position at rest or when moving in a localised domain, where a frame at rest does not change its position over time in relation to its surroundings. However, the mechanism only allows the moving frame to see a mirror of its own motion in the resting frame, giving the impression that it is moving in the opposite direction. Hence, the relative motion is a synthesis of the real and imaginary motions with direction reversibility allowing jk laws to include complex velocity.  Under these laws vector quantities be in cross product or in dot product remain invariant such as Maxwell equations, space-time intervals and rotating frame as vectors show reciprocity. However, inherent scalar quantities such as mass, time, length etc. show inverse variation. So, unlike Lorentz transformation jk transformation is not a vector dominated law. The physical processes without reciprocity effects justify quantization of red-shift and particle decay. These ideas are helpful in comprehending the subtleties of the micro universe, including the asymmetry of Doppler's shifting images and short-lived particles, antimatter, subatomic particles, gamma rays, GRBs, cosmic rays, and subatomic particles.