Research on Conflict Point Delay of Left-turning Vehicles at Two Phases Signal Control Intersection

AbstractAnalysis of intersection delay is important for intersection signal timing. Based on the gap acceptance theory, the conflict point delay of left-turning vehicles crossing opposing flow in mixed traffic at two phases signal control intersections is set up with probability theory. Observed values of conflict point delay of left-turning vehicles are compared with the calculated values from the model by choosing some certain intersections in Nanjing. Relationships among conflict point delay of left- turning vehicles, volume of opposing flow and composition of left-turning vehicles has been analyzed. The result shows that the model accords with the actual traffic flow condition at a two phases signal control intersection

Do Users Mind the Brand Engagement? The Effect of Brand Engagement in Knowledge Sharing Virtual Community

Although previous studies have discussed antecedent mechanisms for user participation and the value it creates in the brand community. Few studies discuss the role of brands, communities, and users in the co-creation of value when virtual communities are established based on users\u27 interests or needs. This paper explored the effect of brand participation on user community engagement intentions/behaviors in virtual communities. Data was collected from China by online survey and empirical analysis was used for hypotheses testing. The result shows that when brands participate in virtual communities, the higher the user\u27s engagement intention, the easier it is for them to make knowledge contribution, which will promote the development and operation of virtual communities. What’s more, in the context of brand participation, brand interactivity will affect the user\u27s community engagement intention and thus the user\u27s knowledge contribution, which will prompt the development of a virtual community. These findings confirmed that virtual community can help to implement circle marketing, interact with consumers, improve consumers\u27 willingness to participate actively, and have positive practical significance for the government and firms

Effects of Intellectual and Social Alignment on Organizational Agility: A Configurational Theory Approach

Literature has shown that business-information technology (IT) alignment can exert both positive and negative influences on organizational agility, giving rise to the IT alignment-agility paradox. To better understand this paradox at a more granular level, we conceptualize the sensing and responding dimensions of organizational agility as two independent constructs and suggest a nonlinear analytical approach. Based on configurational and contextual perspectives, this study investigates how intellectual and social alignment and organizational and environmental elements combine into multiple configurations to affect sensing and responding capabilities. Fuzzy-set qualitative comparative analysis (fsQCA) is used to analyze the survey data from 135 dyads of business and IT executives from the Chinese shipbuilding industry. Results show that different equifinal pathways can be used to achieve high sensing and responding capabilities, in which intellectual and social alignment play heterogeneous roles depending on the specific contexts. This study extends the IT-enabled agility literature by deepening our understanding of the effects of multidimensional IT alignment on multidimensional organizational agility and providing new insights into the IT alignment-agility paradox

A Stochastic Adjustment Strategy for Coordination Process in Distributed Networks

Cloud computing has become a popular basis that integrated into amount of large platforms to support applications (e.g., multimedia, vehicle traffic, and IoT). It is critical to focus on coordinating the part of these applications that execute in the cloud to provide reliable, scalable and available services. Nevertheless, the problem of optimally coordinating the applications is rarely addressed. In this paper, we develop a stochastic model to analyze the fundamental characteristics that occur in ZooKeeper during the coordination process. The model primarily addresses two aspects: demands of followers and the load of a leader. Then, we derive the optimal strategy for provision with deployment of coordinated servers to achieve load balancing based on various factors (e.g. server capacity and network load), so that the overall network performance is optimized. We evaluate our algorithm under realistic settings and reveal the trend of factors such as CPU, memory utilization and network bandwidth with the increasing number of requests. We propose the algorithm that considers how many servers should be deployed and when. Our results demonstrate that the strategy guarantees the performance by making suitable deployment adjustment

ClockViz: Designing Public Visualization for Coping with Collective Stress in Teamwork

The intervention solutions for coping with collective stress have been neglected in interaction design because of limited scalability of the physiological measuring methods. This paper focuses on exploring visual biofeedback design for collective stress in the context of teamwork. We design ClockViz, an augmented reality installation overlaid with static or dynamic projection to visualize three different extents of collective stress on a clock. Results of a 16-participant study show that ClockViz is useful to provide biofeedback data, change their internal status, and increase their mindfulness. Based on the results, we also discussed the potential solutions to collective stress sensing for designers to apply into their interactive design intervention

Thermodynamics and evaporation of perfect fluid dark matter black hole in phantom background

We present a novel interpretation of the thermodynamics of perfect fluid dark matter (PFDM) black hole based on Misner-Sharp energy, and then investigate its evaporation behavior. We find that the ratio between dark sector initial density and black hole horizon radius significantly influences black hole evaporation behaviors. We demonstrate that the presence of the dark sector can significantly extend the lifetime of a black hole which is similar to the Reissner-Nordstrom case. Our work reformulates the thermodynamics of PFDM black holes and points out the existence of long-lived black holes in the presence of the dark sector.Comment: 14 pages, 2 figures, comments are welcomed. v2: typos correcte