Abstract While general relativity predicts only two tensor modes for gravitational-wave (GW) polarization, metric theories of gravity allow up to four additional modes, including vector and scalar modes. Observing the polarization GWs could provide a direct test modified gravity. The stochastic GW background (SGWB), which can be detected by space-based laser-interferometric detectors at design sensitivity, will an opportunity directly measure alternative polarization. In this paper, we...

With the accumulation of pulsar timing data, evidence stochastic gravitational wave background (SGWB) in nanohertz is becoming more and significant. It gradually possible to study theory gravity with data. Since arrays (PTAs) can observe multiple pulsars at same time, their different spatial correlation patterns caused by SGWB various polarizations make it detect gravitational-wave polarization. In this paper, we investigate alternative NANOGrav 15-year dataset (NG15). First, frequentist...

In the more and expanding complicated data center, requirements on air conditioning system distribution arrangement are getting higher higher. One of resolutions is improving airflow uniformity cooling local over-hot area by raising floor in center. With a typical mode four rows cabinets center as sample. This paper uses Computational fluid dynamic (CFD) to investigate influence six raised heights (0.2m, 0.4m, 0.6m, 0.8m, 1m 1.2m) three types under-floor (the open aisle, cold aisle...

In this paper, the scalar quasinormal modes of nonlinear charged black hole metrics in Rastall gravity is investigated. The electromagnetic tensor presented background spacetime possesses a power-law form, and system assumed to be surrounded by quintessence field. By utilizing recently obtained analytic form metric, frequencies are via matrix method. numerical values have been further compared against those evaluated using WKB approximation up thirteenth order. Also, finite difference method...

Abstract Future space-based gravitational-wave detectors will detect gravitational waves with high sensitivity in the millihertz frequency band, providing more opportunities to test theories of gravity than ground-based detectors. The study quasinormal modes (QNMs) and their application theory testing have been an important aspect field physics. In this study, we investigate capability future wave detectors, such as LISA, TaiJi, TianQin, constrain dimensionless deviating parameter for...

Abstract We study the dynamics of critical collapse a spherically symmetric scalar field. Approximate analytic expressions for metric functions and matter field in large-radius region are obtained. In central region, owing to boundary conditions, equation motion is reduced flat-spacetime form.

In this paper, we study the quasinormal modes of massless Dirac field for charged black holes in Rastall gravity. The spherically symmetric hole solutions question are characterized by presence a power-Maxwell field, surrounded quintessence fluid. calculations carried out employing WKB approximations up to 13th-order, as well matrix method. temporal evolution is investigated using finite difference Through numerical simulations, properties frequencies analyzed, including those extremal...

MicroRNAs have been recently shown to be important regulators of lipid metabolism. However, the mechanisms microRNA-mediated regulation long-chain polyunsaturated fatty acid (LC-PUFA) biosynthesis in vertebrates remain largely unknown. Herein, we for first time addressed role miR-26a LC-PUFA marine rabbitfish Siganus canaliculatus The results showed that was significantly down-regulated liver reared brackish water and S. hepatocyte line (SCHL) incubated with precursor α-linolenic acid,...

A pulsar timing array (PTA) is expected to detect a gravitational wave background (GWB) in the nanohertz band within next decade. This provides an opportunity for one test gravity theory and cosmology. typical data analysis method GWB cross-correlation analysis. The overlap reduction function (ORF) plays important role correlation of GWB. present approach dealing with intricate integration ORF use short-wave approximation drop out tricky terms. In this paper, we provide full analytic...

This paper presents the design simulation of compact meander line antenna for GSM/DAB/DCS bands used in mobile handsets. The dimensions LTCC chip are 20×10×0.85 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . structure includes two patches. bottom patch is tuned to GSM band, and top designed DCS band. coupling between patches obtain DAB instead stacking a third on It found that quality varies with space With 2.5:1 VSWR impedance...

Feature extraction and the classifier design were crucial parts for image recognition of insect pests on agriculture field crops. The hardware detection device included trapping, stunning buffering unit, even illumination scattering transporting vision unit. seven morphological features from binary images extracted normalized, such as area, perimeter, complexity. standard vector model library membership functions established based feature mean deviation nine species pests. fuzzy decisions...

Fish, particularly marine species, are considered as the major source of long-chain polyunsaturated fatty acids (LC-PUFA) in human diet. The extent to which fish can synthesize LC-PUFA varies with species and is regulated by dietary ambient salinity. Therefore, enable produce more LC-PUFA, comprehending mechanisms underlying regulation biosynthesis necessary. Here, regulatory roles miR-145 were investigated teleost rabbitfish Siganus canaliculatus. hepatic abundance was lower reared low...

From current study on buffer generation method, we find the research method in special shapes is insufficient. This paper a general and specific of point, line area, finally presents complete based Minkowski sum. Generally, computing sum geometry with disc radius equal to distance. And some regions can be created by calculating other shapes. In end, employ Jiangsu province 1∶1,000,000 basic geographic data verify effectivity practicability aforementioned method.

This paper proposed a novel low power charge-redistribution successive approximation analog-to-digital converter (CR-SAR ADC). During its conversion, the reference voltage is only half of ADC's dynamic range. The monotonic switching procedure used to further reduce energy SAR ADC. Matlab simulations are performed compare energies in and previous ADCs. A 11-bit 40-KS/s ADC using technique designed simulated with UMC 0.18 µm 1P6M CMOS technology. achieves 10.75 effective number bit (ENOB)...

Future space gravitational-wave detectors will detect gravitational waves with high sensitivity in the mHz frequency band. One possible source is stochastic background (SGWB), possibly from astronomy and cosmology. Detecting SGWB could provide an opportunity to directly examine polarization of waves. While general relativity predicts only two tensor modes for polarization, metric theories gravity allow up four additional modes, including vector scalar modes. Observing other would indicate...

This paper presents an algorithm to determine whether a point-set composed of n-points is in the polyhedron or not-which called convex hull method. With this method, it not necessary judge each point set within polyhedron. By constructing three-dimensional remain target points, by means collision detection spatial objects adjacency relations and set, then vertices are polyhedron, hull, thus which points spots can be determined. The applied only general but also concave efficiency checking...

The automatic vibration screening of the insects is important part in image recognition stored-grain insects. A detection device was developed to analyze properties Coleopteran main structure included a unit, dust removal unit grain insects, binocular machine vision and an transporting unit. adults Sitophilus Oryzae were taken as objects. Full factorial design used order find out better parameters. Then orthogonal experiment designed optimize parameters further, distinguish between primary...

We study the dynamics of critical collapse a spherically symmetric scalar field. Approximate analytic expressions for metric functions and matter field in large-radius region are obtained. In central region, owing to boundary conditions, equation motion is reduced flat-spacetime form.

Abstract We study the energy issue in critical collapse. It is found that collapse, contribution from material greater than gravitational energy. The quantity m / r plays an important role identifying formation of apparent horizon where Misner–Sharp mass and areal radius. observe maximum value fluctuates between 2/15 4/15. This denotes a large gap collapse black hole for which criterion = 1/2.