A Study of Chinese Students’ Media Dependence on Douyin in Malaysia

This paper uses the “Media System Dependency Theory” proposed by American communication scholars Paul Rockich and Melvin DeFleur as a research framework to investigate the deep-seated reasons for the dependence of Chinese international students on Jitterbug in social media, and to propose countermeasures. Overseas students are an important force for the great rejuvenation of the Chinese nation, and their values will influence the values of the whole society in the future. The international students are in the period of value formation and cognition, so it is very important to grasp the cognition formation in this period. With the advent of the mobile Internet era, short video social media, represented by Jitterbug, has become one of the most popular leisure and entertainment platforms for international students. However, while Jitterbug has brought rich experiences to young people, some negative effects have come along with it. Many international students seem to be inseparable from Jitterbug, gradually developing into a strongly sticky “relationship chimera”. It can be said that tens of thousands of international students not only cannot leave Jitterbug, but also gradually develop a kind of “dependency syndrome”—spending a lot of time and energy indulging in it, experiencing negative effects such as reduced attention span and indifferent interpersonal communication, and becoming doubly dependent on Jitterbug in terms of emotion and behavior. This study aims to examine the effects of the dual dependence on Jitterbug. Therefore, this study hopes to analyze the dependence of international students on Jitterbug as a social media and propose countermeasures to improve the media literacy of international students

Transition to turbulence in pulsating pipe flow

Fluid flows in nature and applications are frequently subject to periodic velocity modulations. Surprisingly, even for the generic case of flow through a straight pipe, there is little consensus regarding the influence of pulsation on the transition threshold to turbulence: while most studies predict a monotonically increasing threshold with pulsation frequency (i.e. Womersley number, $\alpha$), others observe a decreasing threshold for identical parameters and only observe an increasing threshold at low $\alpha$. In the present study we apply recent advances in the understanding of transition in steady shear flows to pulsating pipe flow. For moderate pulsation amplitudes we find that the first instability encountered is subcritical (i.e. requiring finite amplitude disturbances) and gives rise to localized patches of turbulence ("puffs") analogous to steady pipe flow. By monitoring the impact of pulsation on the lifetime of turbulence we map the onset of turbulence in parameter space. Transition in pulsatile flow can be separated into three regimes. At small Womersley numbers the dynamics are dominated by the decay turbulence suffers during the slower part of the cycle and hence transition is delayed significantly. As shown in this regime thresholds closely agree with estimates based on a quasi steady flow assumption only taking puff decay rates into account. The transition point predicted in the zero $\alpha$ limit equals to the critical point for steady pipe flow offset by the oscillation Reynolds number. In the high frequency limit puff lifetimes are identical to those in steady pipe flow and hence the transition threshold appears to be unaffected by flow pulsation. In the intermediate frequency regime the transition threshold sharply drops (with increasing $\alpha$) from the decay dominated (quasi steady) threshold to the steady pipe flow level