Investigating Factors Influencing Telemedicine Usage in Developing Countries

Telemedicine has a strategic role in providing timely medical care and containing the spread of infectious diseases. Despite its importance, telemedicine is largely underdeveloped in developing countries. This paper attempts to explore the factors influencing telemedicine usage by conducting case studies in two Chinese hospitals. Based on a research model we proposed, factors are identified that are likely to affect the use of telemedicine

Dynamical Properties of TCP System with AQM Routers

In this report we discuss the dynamics of heterogeneous TCP systems with propagation delays. Instead of studying the local linearized TCP dynamics, we study the global stability conditions and obtain the stability regions. Also we provide proof of periodic behavior of a single TCP connection when stability conditions are not met

Global Stability of TCP with AQM Router

In this study we extend the global stability results of the previous report cite{tr}. We focus on the scenario of a single TCP flow with proportional AQM controller at the router. By using Lyapunov functional method, we are able to prove the global stability of such nonlinear system with feedback delay

Electroplating lithium transition metal oxides.

Materials synthesis often provides opportunities for innovation. We demonstrate a general low-temperature (260°C) molten salt electrodeposition approach to directly electroplate the important lithium-ion (Li-ion) battery cathode materials LiCoO2, LiMn2O4, and Al-doped LiCoO2. The crystallinities and electrochemical capacities of the electroplated oxides are comparable to those of the powders synthesized at much higher temperatures (700° to 1000°C). This new growth method significantly broadens the scope of battery form factors and functionalities, enabling a variety of highly desirable battery properties, including high energy, high power, and unprecedented electrode flexibility

Geometric Phase Generated Optical Illusion

Abstract An optical illusion, such as “Rubin’s vase”, is caused by the information gathered by the eye, which is processed in the brain to give a perception that does not tally with a physical measurement of the stimulus source. Metasurfaces are metamaterials of reduced dimensionality which have opened up new avenues for flat optics. The recent advancement in spin-controlled metasurface holograms has attracted considerate attention, providing a new method to realize optical illusions. We propose and experimentally demonstrate a metasurface device to generate an optical illusion. The metasurface device is designed to display two asymmetrically distributed off-axis images of “Rubin faces” with high fidelity, high efficiency and broadband operation that are interchangeable by controlling the helicity of the incident light. Upon the illumination of a linearly polarized light beam, the optical illusion of a ‘vase’ is perceived. Our result provides an intuitive demonstration of the figure-ground distinction that our brains make during the visual perception. The alliance between geometric metasurface and the optical illusion opens a pathway for new applications related to encryption, optical patterning, and information processing

Research on the corrosion/permeability/forest resistance of concrete by experimental and microscopic mechanisms under different water-binder ratios

To study the influence of different water–binder ratios on the corrosion, permeability, and freezing properties of concrete, we produced different strengths of concrete with respective water–binder ratios of 0.32, 0.38, 0.50, and 0.66. The corrosion resistance of the concrete was studied via three corrosion methods: full immersion, half immersion, and dry and wet cycles. The impermeability and frost resistance of concrete with different water–binder ratios were tested and analyzed. The test results show that the corrosion modes in order from strong to weak were dry and wet cycles, half soaking, and full soaking. The relative dynamic elasticity modulus and freeze–thaw index were used to evaluate the frost resistance of concrete based on the analysis of three indices of frost resistance. To study the internal mechanism of corrosion of concrete with different water–binder ratios, microscopic pore structure testing of the concrete was conducted using a Micromeritics AutoPore IV 9500 Series instrument. The porosimeter studies show that the smaller the water–binder ratio, the more small pores and the denser the concrete. The smaller the water–binder ratio, the higher the strength and the better the corrosion, permeability, and frost resistance

Motivating information security policy compliance: The critical role of supervisor-subordinate guanxi and organizational commitment

Employees’ non-compliance with organizational information security policy (ISP) when using informational resources has become the main reason for continuous security incidents. Drawing upon technology threat avoidance theory (TTAT) and social exchange theory (SET), our study investigates the influence of supervisor-subordinate guanxi (SSG) and organizational commitment in the information security management. Our hypotheses were tested using survey data from 235 Chinese government employees. Results not only confirm the direct effect of SSG on government employees’ ISP compliance but also suggest that SSG indirectly influences compliance behavior via the mediation of organizational commitment. Organizational commitment weakens the negative influence of perceived costs on compliance behavior and also weakens the positive effect of self-efficacy on employees’ ISP compliance. For low-commitment employees, the negative influence of perceived costs on compliance behavior is more significant than that of those with strong organizational commitment, and self-efficacy exerts a stronger effect on ISP compliance for low-commitment employees than it does for high-commitment employees. This study contributes to current literature on information systems (IS) by confirming the critical roles of SSG and organizational commitment in motivating employees’ compliance behavior