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The purpose of this stud is to analyze the financialization effect on oil prices.

This study applied the technique of multibreak point analysis with Bai and Perron test plus VAR methodology.

Findings revealed that there was no effect on oil prices.

To the best of the author’s knowledge, this is the first paper combining the multibreakpoint analysis with VAR for the period analyzed in the present work.

In response to the problem of insufficient traction/braking adhesion force caused by the existence of the third-body medium on the rail surface, this study aims to analyze the utilization of wheel-rail adhesion coefficient under different medium conditions and propose relevant measures for reasonable and optimized utilization of adhesion to ensure the traction/braking performance and operation safety of trains.

Based on the PLS-160 wheel-rail adhesion simulation test rig, the study investigates the variation patterns of maximum utilized adhesion characteristics on the rail surface under different conditions of small creepage and large slip. Through statistical analysis of multiple sets of experimental data, the statistical distribution patterns of maximum utilized adhesion on the rail surface are obtained, and a method for analyzing wheel-rail adhesion redundancy based on normal distribution is proposed. The study analyzes the utilization of traction/braking adhesion, as well as adhesion redundancy, for different medium under small creepage and large slip conditions. Based on these findings, relevant measures for the reasonable and optimized utilization of adhesion are derived.

When the third-body medium exists on the rail surface, the train should adopt the low-level service braking to avoid the braking skidding by extending the braking distance. Compared with the current adhesion control strategy of small creepage, adopting appropriate strategies to control the train’s adhesion coefficient near the second peak point of the adhesion coefficient-slip ratio curve in large slip can effectively improve the traction/braking adhesion redundancy and the upper limit of adhesion utilization, thereby ensuring the traction/braking performance and operation safety of the train.

Most existing studies focus on the wheel-rail adhesion coefficient values and variation patterns under different medium conditions, without considering whether the rail surface with different medium can provide sufficient traction/braking utilized adhesion coefficient for the train. Therefore, there is a risk of traction overspeeding/braking skidding. This study analyzes whether the rail surface with different medium can provide sufficient traction/braking utilized adhesion coefficient for the train and whether there is redundancy. Based on these findings, relevant measures for the reasonable and optimized utilization of adhesion are derived to further ensure operation safety of the train.

Futurist Jim Dator provides a personal insight of how he “sees” the past, present, and futures of Hawaiian tourism. The paper aims to discuss this issue.

Ian Yeoman interviews one of the world's most prominent and respected futurists, Professor Jim Dator, from the Futures Research Center of the University of Hawaii at Manoa's Political Science Department.

Like a climatologist, futurists discuss long‐term futures which are very uncertain, controversial, and often frightening stories. The past tells how the present occurred. Understanding that story is essential before considering the future. The growth of tourism is a fabulous story dependent on many developments whose future is uncertain. The tourism industry may want a “more of the same” trajectory of continued economic growth but a number changes are on the horizon which Dator calls “The Unholy Trinity,” namely the end of cheap and abundant energy; a profoundly unstable environment and a dysfunctional global economic system. Dator concludes that no government now governs satisfactorily, and so the future of tourism is extremely precarious and uncertain.

The interview provides both insight into how tourism has evolved and foresight of what could occur in the futures. Central to the interview is Dator's identification of the Unholy Trinity, Plus One, that suggests that the future will not neither be like the present nor like the future the tourism industry has hoped for in terms of continued economic growth. The originality and value of Dator's frank views are thought provoking, going beyond present wisdom and comfort.