Purpose: To find out ships' optimum operating speed under low-carbon economy. Approach: First, it analyzes the relations between ship's carbon emission and the operating speed, gets the optimum speed under which the entire fleet emit minimum carbon, then establishes the relations between the ship owner's profit and the speed, extracts the speed under which the ship owner can gain the maximum profit and founds out it's different from the speed under which the entire fleet emit minimum carbon. Findings: The government must take effective measures to make the ship owner slowdown and reduce emission. Originality: It first works out a balance point between the decrease of carbon emission brought by a lower operating speed and the increase of that caused by more vessels putting into service in a mathematical method. ; Peer Reviewed
Employees frequently have to use various media to complete multiple tasks at work, and depression has become a common problem influencing their mental health and work efficiency. We conducted a survey to investigate the relationship between the media multitasking and depression of 490 employees of a state-owned enterprise in China. The results showed that media multitasking was positively correlated with employee depression. Moreover, ego depletion significantly mediated the relationship between media multitasking and depression, and self-control moderated the relationship between ego depletion and depression. Greater self-control may help buffer the effect of ego depletion on depression. These results have theoretical and practical implications for improving employees' mental health during China's enterprise transformation process.
"This insightful and timely volume provides a succinct, expert-led introduction to the latest developments in advanced econometric methodologies in the context of tourism demand modelling and forecasting. Embellished with insightful figures and tables throughout, this book is an invaluable resource for those using advanced econometric methodologies in their studies and research, including postgraduate students, researchers and practitioners"--
PurposeThe purpose of the study is to evaluate the severity of public events in real time from the perspective of social media and to construct the early warning mechanism of public events.Design/methodology/approachThis study constructed the severity assessment system of public events from the dimensions of the netizens' role, the Internet media's role, the spread of public events and the attitudes and feelings of netizens. The method of analyzing the influence tendency of the public event severity indicators was proposed. A total of 1,107,308 microblogging entries regarding four public events were investigated. The severity of public events was divided into four levels.FindingsIt is found that serious public events have higher indicator values than medium level events on the microblogging platform. A quantitative severity classification standard for public events was established and the early warning mechanism of public events was built.Research limitations/implicationsMicroblogging and other social media platforms provide rich clues for the real-time study and judgment of public events. This study only investigated the Weibo platform as the data source. Other social media platforms can also be considered in future.Originality/valueDifferent from the ex-post evaluation method of judging the severity of public events based on their physical loss, this study constructed a quantitative method to dynamically determine the severity of public events according to the clues reflected by social media. The results can help the emergency management departments judge the severity of public events objectively and reduce the subjective negligence and misjudgment.
