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Voice over Wi-Fi (VoWiFi) enables economical, high-quality voice communications through IP multimedia services over WLAN infrastructure. With the stringent real-time quality requirements, however, it is especially susceptible to breaches of security. This article provides an in-depth review of Wi-Fi...

The crude oil in Hainan Fushan Oilfield has the characteristics of high pour point(PP) and bad low temperature flow properties. Based on the analysis of Fushan crude oil physical property and test results, the pour point depressant(PPD) FJ-2 was synthesized by the graft copolymerization of vinyl acetate...

The research employed both quantitative and qualitative methods. 50 freshmen from Wuhan Textile University participate in the study. The whole procedure lasted for 8 weeks. At the beginning of the research, i.e. the first week, the questionnaires for evaluation of teacher’s classroom nonverbal behavior...

The selection of ground motions can be developed on the basis of code provisions, and codes provisions are quite similar worldwide, for example, the main prescription is the compatibility with the design spectrum in a specified range of periods, and the minimum set size is typically from 3–7 records....

Switched reluctance driver (SRD) is a high efficiency, new energy-saving variable speed control system. Simulink is commonly used as a simulation platform to guide the design, but there is only 6/4 switched reluctance motor (SRM) model and the widely used 12/8 SRM model is not included in Simulink component...

Oil in water drilling fluid is a suitable water based drilling fluid for horizontal well, because of good lubricity, liquidity and borehole stability. Optimized and matching emulsifiers, in the2:8 ratio of oil to water, the emulsifiers OP-10+SP-80 ratio of 3:2 is the best effect of emulsion stability,...

Results are presented for the silicon carbide (SiC) vertical channel junction field effect transistor (VJFET) fabricated based on in-house SiC epitaxial wafer suitable for power devices. The Normally-off 1300V SiC VJFET device’s current density is 260 A/cm2 and current is 8 A at VG= 7 V and VD = 2 V,...

Research on midfield position has an important meaning for the result of RoboCup Simulation 2D. This paper divides the whole region into eight parts, then count the cycle’s number of the both player 6, 7, 8 midfielders in the game in the eight regional positions. Next, three common factors were extracted,...

Corona Virus Disease-19 (Covid-19) began to grip the community, when the number of people who died has been increased since January 2020. Over time, the Minister of Education and Culture on March 24, 2020 issued a Circular on Education Policy in an Emergency for the Spread of Covid-19. In point (a),...

The purpose of this research is to produce a writing pattern in terms of the number of supporting elements: identification of the average number of words in a lema ‘entry’; the number of characters in a word, the number of lines in a paragraph, and the number of sentences in a paragraph. The method used...

Currently, visual saliency detection has been discovered and widely applied in the field of computer vision and image processing. Recent works have shown that considering human visual system features in image quality assessment will improve the consistence between objective assessment results and subjective...

A novel image steganography method using chaotic map and human visual model is presented in DCT domain. Firstly each 8×8 image block is performed Discrete Cosine Transform, then the location of image block that is embedded secret message is determined by the chaotic map. Finally the secret message is...

At the two embedded solid depth, research on the displacement, bending moment and shear stress of micro-pile composite structure have been studied based on the FLAC3D program. Results show that: micro pile maximum bending moment occurs in the vicinity of the sliding surface, the maxi-mum shear stress...

Based on wireless sensor network technology, this paper focuses on the study of the problem of heterogeneous seamless integration of multi-sensor nodes and puts forward a correlation protocol concerning SMAC multi-point, multi-type sensor network nodes self-organizing wireless networking application....

We use Fama-French to empirically analyze 2,288 portfolios of 26 China stock market industry sectors from 2016 to 2020 of industry sectors. The results show that: Although factor effect is common in China stock market industry sector, it shows obvious difference in factor dominance, among which 19 and...

Recently years many large lakes are eutrophic or in serious state of eutrophication. And most eutrophic water from phosphorus control action is the amount of input, so how to effectively reduce the phosphorus content of sewage has become noticeable within the field of environmental protection issues....

As the development of spacecraft, the multi-system leak detection is needed. The multi-system leak detector on spacecraft by QMS (quadrupole mass spectrometer) has been developed and it has been used in the new spacecraft successfully. The problem of repeat and reliability of QMS in long time is avoided....

This paper analyzes the features of vocabulary use of TEM-8 compositions (Test of English for English Majors Band 8) and third-year English majors’ compositions at Guangxi University based on the calculations of RANGE, SPSS 19, and the Jukupigai automated scoring system. This research aims to identify...

Objective To determine the impact of artificial intelligence (AI) on the selected economies in the Asia-Pacific region. Methods This secondary research collected data from macroeconomic and AI-specific data sets. The sources of data from which insights were gained included digital technology sectors...

Research-based on local wisdom has been carried out to facilitate students to learn not only about science that has its roots in the west but also about local wisdom from ancestral heritage and applies from generation to generation, especially about food security. This research is a case study that aims...

Early childhood aged 5-6 years should be able to control hand movements using fine motor skill. However, in Karawang Regency, most of early childhood aged 5-6 years have fine motor skills disorders which indicated by a lack of ability to hold a pencil, control hand movements, cut to follow patterns....

In order to study the dynamical behavior of stiffened plates of steel box girder with trapezoidal stiffeners, FE software ANSYS and its secondary development are used to build the model of the stiffened plate. The plate, transverse diaphragms and trapezoidal stiffeners are all modelled by Shell63 Element,...

The alternate directions implicit finite difference beam propagation method is used to analyze the two-dimensional symmetrical multimode interference couplers. The positions of the images at the output plane and the length of multimode waveguide are accurately determined numerically. In order to reduce...

This paper focuses on a large kitchen fume gas purification device newly designed by numerical simulation using FLUENT software. The velocity distribution and pressure distribution within the whole device are simulated. Particle trajectories of different droplet diameters (5 m, 8 m, 11 m, and 15 m) are...

Objective: this paper studies the effect of group psychological counseling on the improvement of college students’ social adaptability and provides theoretical basis for the improvement of college students’ mental health. Methods: a total of 84 second-year undergraduates were randomly selected as subjects....

Due to the fierce market competition and the heavy impact of Covid-19, budget hotels are facing great challenges. In order to maintain competitiveness, it is necessary for budget hotels to have a smart technology solution system from a customer perspective in order to win customers at a relatively low...

For most departments of a selected university, this article first calculates the matching comparison performances of correct selection rate, the reserve rate, and the distribution rate, in the 2014-2016 academic years and the 2018-2020 academic years respectively; Then, it compares the difference of...

A series of binary mixtures of adipic acid (AA) and erythritol (Ery) were prepared and the thermal properties were investigated in this study. The results showed that a eutectic mixture was formed when the mass ratio of adipic acid and erythritol reached 1:7. The eutectic mixture displayed a melting...

Hardness forming ions such as Ca2+ and Mg2+ in cooling water tended towards scale on the surface of the heat exchanger, resulting in reduction of heat transfer efficiency. In this paper, by using DSA electrodes, effects of operational conditions on water softening was evaluated by Lab scale experiments....

Since the beginning of March 2020, the number of positive cases of the 2019 coronavirus disease (Covid-19) has continued to increase. Until Wednesday (1/4/2020), the number of positive cases of Covid-19 reached 1,677. There were 103 patients who were declared cured and 157 other patients died. Over the...

Biodiesel, a biodegradable, sustainable and clean energy has attracted growing interest in recent years, mainly due to development in bio-diesel fuel and ecological pressures including climatic changes. In this study, lipase strains FS14 extracted from soil which is polluted by oil and fat were analyzed...

With the rapid development of the AI-driven information age, information management and information systems, as the management hub, play a crucial role in information collection, processing, and storage. However, current research on management information systems is extensive and highly overlapping....

Children aged 5-6 years should have the ability to to express their wishes verbally. Nevertheless, most of child aged 5-6 years in Karawang Regency still unnable to express their wishes because lack the confidence to tell stories and afraid to argue. The purpose of this study was to analyze the effect...

Differences in physiological, physical, and technical demands of the college basketball training related to the number of players, court size, and work-to-rest ratios are not well characterized. A controlled trial was conducted to compare the influence of number of players (2v2/4v4), court size (half/full...

This paper proposes a global learning of neural networks by hybrid optimization algorithm. The hybrid algorithm combines a stochastic approximation with a gradient descent. The stochastic approximation is first applied for estimating an approximation point inclined toward a global escaping from a local...

This study investigates a deep foundation pit project on the south bank of the Taiping River in Chang'an District, Shijiazhuang City, Hebei Province. The project features 7–18 floors above ground and 1–2 underground floors, with excavation depths ranging from 5.5 to 9.3 m under complex geological...

Purpose/Background/Objectives: Type 2 Diabetes Mellitus (T2DM) is a disease characterized by macro and microvascular complications, particularly, coronary heart disease, cerebrovascular disease and nephropathy [1–4]. The green tea extract has shown an anti-inflammatory effect (2), so this nutraceutical...

Purpose/Background/Objectives: Acute kidney injury (AKI) is a serious postoperative complication. Increased arterial stiffness has been shown to be an independent risk factor for cardiovascular events. Our aim was to investigate whether arterial stiffness is a predictor of AKI in patients following surgical...

The mathematical model of anti-twist braided wire rope structure is the basis for studying the mechanical problems of wire rope. According to the forming principle of anti-twist wire rope, the structure and dimensional characteristics of wire rope are analyzed. Applying the differential geometry theory...

The purpose of this study was to test student resilience between before and after the application of group guidance with budi santri values to increase student resilience. This research is an experimental type with a pretest-posttest one group design. The measuring instrument used is the resilience scale....

The present research aims to identify the critical issues of plant inefficiencies caused by plant wastes and safety issues. The study was conducted at a medium-scale cement refractory manufacturing special application cement. The research involved waste identification, waste analysis, and waste elimination...

In this paper, design and fabrication of a substrate integrated waveguide (SIW) with 14-28 GHz bandwidth is implemented. The SIW-based system with Quadrature Phase Shift Keying (QPSK) modulation and demodulation technique is designed and implemented. The measurement results show that the proposed system...

Although in situ denitrification has been well documented in landfills, few studies have paid attention on the denitrifier in landfills who dominates this process. In this study, a strain P-1-5 was isolated from landfill by Pseudomonas selecting medium and identified as Pseudomonas stutzeri by 16S rRNA...

Introduction: The ventricles accelerate and decelerate blood; the resulting disturbances propagate through the arterial system as waves. These waves contain clinically useful information: e.g. their magnitude and timing varies with cardiac performance and their speed depends on arterial stiffness. These...

Academic dishonesty is a dishonest behavior done by students to obtain good marks by violating the regulations so that it harms other people. The effect of students’ academic dishonesty is influenced by several factors such as academic pressure, opportunity, rationalization, individual’s ability in making...

Background: Central aortic pressure waveforms can be modelled non-invasively in adults using general transfer functions. These techniques have been applied to, but not formally validated in paediatric populations. We recently developed and validated two age-appropriate paediatric transfer functions and...

Background and Objective: Infrared Thermal Imaging (ITI) is a noninvasive method to measure skin temperature (ST). The latter is determined by the microcirculatory blood flow and ambient temperature. Photobiostimulation has been shown to increase blood flow. The objective was to characterize the spatial...

Intelligent network interface cards are widely deployed in databases, web servers, big data analytics, shared mass storage, virtualized network device, router, and firewall. This paper presents an intelligent NIC design based on Freescale T2080 processor. It is a PCI Express card and provides two SFP+...

The growth of the e-commerce industry in Asia in general, and in Indonesia in particular is growing rapidly in the midst of trade flows that are increasingly rapidly advancing. The very rapid development of information technology has given rise to a new style in the trading system, and also the process...

With the development of technology, unmanned aerial vehicles (UAVs) are increasingly utilized in civil applications. Several provinces and cities in China are vigorously developing the low-altitude economy, with industrial environments gradually maturing. However, traditional A-star algorithms produce...