Factors influencing consumers' purchase intention and behaviour on live shopping platforms in the post-epidemic era

Using the TAM, TPB model, and two separate factors, discount, and epidemic, this paper examines the factors influencing purchase intentions of users of live shopping platforms in the post-epidemic era and tests the hypotheses by collecting data through a questionnaire. It was found that there were two perceptual factors in the TAM that had significant indirect effects on purchase intention, with attitude as an important mediator corresponding to two types of motivations for people to watch live streaming, hedonic and utilitarian, respectively (Cai et al., 2018). The significant effects of attitudes and subjective norms on purchase intention in the TPB model reflect the real-time nature of live shopping, i.e. the ability to communicate with sellers in real-time and establish emotional connections, while the significant effect of subjective norms validates that in a collective society, people's willingness to purchase goods is influenced internally by family, friends, etc., and externally by authoritative experts, media, etc. Furthermore, the results of this study do not show a significant effect of discounts on users, which could be related to sensible consumer behavior

Optimizing the Placement of Non-Functional Pads on Signal Vias using Multiple Reflection Analysis

In this study, the effects of using non-functional pads to optimize the performance of high-speed signal vias are investigated based on multiple reflection analysis. The non-functional pads on signal vias introduce more capacitive coupling and are possible to improve the response of the via structure if the original via has relatively larger impedance compared to the system reference impedance. The effectiveness of the non-functional pad optimization is validated through a numerical example, and the eye diagram of the via structure without and with non-functional pads are compared. The eye opening becomes 5.4 times larger after the via optimization using non-functional pads

Mode-Decomposition-Based Equivalent Via (MEV) Model and MEV Model Application Range Analysis

The Mode-Decomposition-Based Equivalent Via (MEV) Model is Proposed in This Paper, which is a Physics-Based Equivalent Model for the High-Speed Channel Modeling. the Application Ranges of the MEV Model Are Analyzed by Varying Anti-Pad Radius, Via Radius, and Distance between the Parallel Plates for a Single Via with Multiple Layers. based on the S-Parameter Comparison with Full-Wave Simulations, the MEV Model is Useful for the Insertion Loss Calculation Up to 100 GHz. Meanwhile, the Return Loss from the MEV Model Shows a High Level of Correlation with Full-Wave Simulation Results Up to 70GHz, Even When the Anti-Pad Radius is Larger Than the Commonly Used Size. the Parallel-Plate Height Has a Negligible Impact on the Accuracy of the MEV Model. This Paper Demonstrates the Large Application Range of the MEV Model and Verifies that MEV Model is Suitable for Practical High-Speed Via Analysis

Complex population genetic and demographic history of the Salangid, Neosalanx taihuensis, based on cytochrome b sequences

<p>Abstract</p> <p>Background</p> <p>The Salangid icefish <it>Neosalanx taihuensis </it>(Salangidae) is an economically important fish, which is endemic to China, restricted to large freshwater systems (e.g. lakes, large rivers and estuaries) and typically exhibit low vagility. The continuous distribution ranges from the temperate region of the Huai and Yellow River basins to the subtropical region of the Pearl River basin. This wide ranging distribution makes the species an ideal model for the study of palaeoclimatic effects on population genetic structure and phylogeography. Here, we aim to analyze population genetic differentiation within and between river basins and demographic history in order to understand how this species responded to severe climatic oscillations, decline of the sea levels during the Pleistocene ice ages and tectonic activity.</p> <p>Results</p> <p>We obtained the complete mtDNA cytochrome <it>b </it>sequences (1141 bp) of 354 individuals from 13 populations in the Pearl River, the Yangze River and the Huai River basin. Thirty-six haplotypes were detected. Haplotype frequency distributions were strongly skewed, with most haplotypes (n = 24) represented only in single samples each and thus restricted to a single population. The most common haplotype (H36) was found in 49.15% of all individuals. Analysis of molecular variance (AMOVA) revealed a random pattern in the distribution of genetic diversity, which is inconsistent with contemporary hydrological structure. Significant levels of genetic subdivision were detected among populations within basins rather than between the three basins. Demographic analysis revealed that the population size in the Pearl River basin has remained relatively constant whereas the populations in the Yangze River and the Huai River basins expanded about 221 and 190 kyr ago, respectively, with the majority of mutations occurring after the last glacial maximum (LGM).</p> <p>Conclusion</p> <p>The observed complex genetic pattern of <it>N. taihuensis </it>is coherent with a scenario of multiple unrelated founding events by long-distance colonization and dispersal combined with contiguous population expansion and locally restricted gene flow. We also found that this species was likely severely impacted by past glaciations. More favourable climate and the formation of large suitable habitations together facilitated population expansion after the late Quaternary (especially the LGM). We proposed that all populations should be managed and conserved separately, especially for habitat protection.</p

High-Speed Differential Via Optimization using a High-Accuracy and High-Bandwidth Via Model

A Physics-Based Equivalent Model of the High-Speed Differential Via Pair with High Accuracy and High Bandwidth is Proposed for the First Time. the Proposed Physics-Based Equivalent Circuit Model of the Differential Via Pair Includes the Effect of Adjacent Ground (GND) Vias. the Proposed Model is Verified using 3D Full-Wave Numerical Simulation Results. in Addition, the Change in Electrical Performance Due to Change in Anti-Pad Radius, the Via Pitch and the GND-Via-To-Differential-Via Distance is Analyzed. based on the Analysis, Electrical Performance of Differential Via Pair Can Be Accurately and Rapidly Optimized with Respect to Design Parameters, such as the Via Pitch, the Anti-Pad Radius and the GND-Via-To-Differential-Via Distance using the Proposed Model, to Provide Pre-Layout Design Guide for High-Speed Channel Designers. by using the Proposed High-Accuracy and High-Bandwidth Physics-Based Via Model, the Via Optimization Time Can Be Drastically Reduced with High Accuracy

The causal effect of a family planning intervention on women's contraceptive use and birth spacing

Studies have suggested that improving access to family planning (FP) may improve contraceptive use and reduce fertility. However, high-quality evidence, particularly from randomized implementation trials, of the effect of FP programs and interventions on longer-term fertility and birth spacing is lacking. We conduct a nonblinded, randomized, controlled trial to assess the causal impact of improved access to FP on contraceptive use and pregnancy spacing in Lilongwe, Malawi. A total of 2,143 married women aged 18 to 35 who were either pregnant or had recently given birth were recruited through home visits between September 2016 and January 2017 and were randomly assigned to an intervention arm or a control arm. The intervention arm received four services over a 2-y period: 1) up to six FP counseling sessions; 2) free transportation to an FP clinic; 3) free FP services at the clinic or financial reimbursement for FP services obtained elsewhere; and 4) treatment for contraceptive-related side effects. Contraceptive use after 2 y of intervention exposure increased by 5.9 percentage points, mainly through an increased use of contraceptive implants. The intervention group’s hazard of pregnancy was 43.5% lower 24 mo after the index birth. Our results highlight the positive impact of increased access to FP on a woman’s contraceptive use. In addition, we show that exposure to the FP intervention led to a prolongation of birth intervals among intervention women relative to control women and increased her control over birth spacing and postpartum fertility, which, in turn, may contribute to her longer-term health and well-being.Published versio

Electromagnetic Transmit Array with Optical Control for Beamforming

This Proof-Of-Concept Paper Demonstrates the Feasibility of using a Slide Projector to Steer the Beam of a Transmit Array by Adding Solar Cells and Varactor Diodes to Each Unit Cell. by Irradiating Each Solar Cell with the Light of Different Intensities from a Slide Projector, the Measured Phase of the Wave Transmitted by the 4x4 Transmit Array Shifts within 92° at 4.26 GHz, While the Variation in Magnitude is Measured within 4 DB. Different Light Configurations Are Identified Via a Searching Algorithm to Achieve Peak/null Beamforming in a Particular Direction. the Beam of the Prototypical 4x4 Transmit Array Can Be Shifted by ±24° in Terms of the Peaks and -30° to 36° in Terms of the Nulls. the Concept of Adding Light Modulation to the Transmit Array with a Slide Projector Can Provide Update Rates of 10s of Milliseconds with Control of Brightness and Color Distributed over a Large Area of the Array

一种基于铁纳米簇的新型可视化葡萄糖传感器

In this paper, a novel fluorescent sensor for glucose detection based on fluorescent iron clusters (Fe NCs) and glucose oxidase is developed. With the increase of glucose concentration, the red fluorescence of iron nanoclusters decreases gradually, and the glucose content can be detected in the range of 0– 100 μmol·L–1. In addition, in order to facilitate the detection of glucose, this paper investigated the coating of Fe NCs and glucose oxidase by agarose and further preparation of agarose gel test strip for glucose detection. Under ultraviolet lamp, the change of glucose content can be identified through the color change of agarose gel

Factors influencing consumers' purchase intention and behaviour on live shopping platforms in the post-epidemic era

Using the TAM, TPB model, and two separate factors, discount, and epidemic, this paper examines the factors influencing purchase intentions of users of live shopping platforms in the post-epidemic era and tests the hypotheses by collecting data through a questionnaire. It was found that there were two perceptual factors in the TAM that had significant indirect effects on purchase intention, with attitude as an important mediator corresponding to two types of motivations for people to watch live streaming, hedonic and utilitarian, respectively (Cai et al., 2018). The significant effects of attitudes and subjective norms on purchase intention in the TPB model reflect the real-time nature of live shopping, i.e. the ability to communicate with sellers in real-time and establish emotional connections, while the significant effect of subjective norms validates that in a collective society, people's willingness to purchase goods is influenced internally by family, friends, etc., and externally by authoritative experts, media, etc. Furthermore, the results of this study do not show a significant effect of discounts on users, which could be related to sensible consumer behavior