The evolution of surfaces and mechanisms of contact electrification between metals and polymers

Contact electrification (CE) is a pretty common phenomenon, but still is poorly understood. The long-standing controversy over the mechanisms of CE related to polymers is particularly intense due to their complexity. In this paper, the CE between metals and polymers is systematically studied, which shows the evolution of surfaces accompanied by variations of CE outputs. The variations of CE charge are closely related to the creep and deformation of the polymer and metal surfaces. Then the relationship between CE and polymer structures is put forward, which is essentially determined by the electronegativity of elements and the functional groups in the polymers. The effects of load and contact frequency on the CE process and outputs are also investigated, indicating the increase of CE charge with load and frequency. Material transfer from polymer to metal is observed during CE while electrons transfer from metal to polymer, both of which are believed to have an influence on each other. The findings advance our understanding on the mechanism of CE between metal and polymers, and provides insights into the performance of CE-based application in various conditions, which sheds light on the design and optimization of CE-based energy harvest and self-powered sensing devices.

A Broader Relevance of Gullivers Suffering in the Context of Culture Shock

Purpose: This study analyzes Gulliver’s sufferings among his different hosts and his relevancy to today’s sojourners who travel abroad and suffer from the effects of culture shock. During his stay with four different hosts, Gulliver remains unable to adjust with them due to the impact of culture shock. He looks at his hosts from the cultural parameters of his native land that leads to multiplication his problems. Like him, most of the travelers who move abroad for various reasons undergo the effects of culture shock. If they fail to understand the internal and external aspects their hosts’ culture, they may respond as Gulliver does. Approach: Though critics have analyzed Gulliver’s character from different perspectives, none has studied him from the lens of culture shock. On close analysis of the text of Gulliver’s Travels, readers can easily observe Gulliver suffering from the effects of culture shock among his hosts. A fresh perspective has been adopted in this study by analyzing Gulliver’s character in the light of culture shock. Culture shock affects sojourners in multiple ways. Many students, migrants, and the diaspora go through this experience while living in a new culture among new people. Findings: This study shows that culture has been a common phenomenon for people who stay abroad for long or settle though they do not realize that several problems that they face are caused by culture shock. However, if someone consciously assimilates the effects of culture shock, it becomes a great experience to live a better life. Implications: Though Gulliver belongs to the eighteenth century England, yet he exists around and among us. It is Gulliver’s relevancy that adds to the meaningfulness of his character for the contemporary sojourners.

Reading in the age of digital distraction

PurposeDigital distraction is a common phenomenon in e-reading contexts, and it is worth exploring in depth from the perspectives of information (digital content), users (readers) and technology (digital reading medium). Since screen reading has close links with multitasking and potential distraction, any investigation of reading in the digital environment must factor in this reality. This paper aims to investigate the extent and effects of digital distraction while reading on screens. Special emphases go to exploring multitasking while reading.Design/methodology/approachSurvey and analysis methods are employed.FindingsThe extent of digital distraction among college students it found is alarming. All the top four sources of distraction are communication-based activities. Female students tend to concentrate more than males when they read on screens. An overwhelming majority of participants choose to read in print to reduce distractions and to concentrate effectively. Screen reading is inherently distracting, primarily due to multitasking. It appears that repeated multitasking during academic endeavors carries substantial costs.Originality/valueImplications of digital distraction are discussed, and directions of future research are suggested.

A NOVEL PERMEABILITY MODEL IN DAMAGED TREE-LIKE BIFURCATING NETWORKS CONSIDERING THE INFLUENCE OF ROUGHNESS

The seepage in tree-like bifurcating networks is a very common phenomenon in nature. The research on the transport characteristics of tree-like bifurcating networks has always been a hot topic. In this paper, a novel permeability model for fluid flow in damaged tree-like bifurcating networks is proposed. In the proposed model, the influence of roughness on permeability is considered by means of the fractal method. It is found that the permeability is not only related to the structural parameters of the network but also related to the damaged position and the number of damaged tubes at the damaged position. The effects of these parameters and damaged structure on permeability are discussed separately. The results show that the permeability reduces along with an increase in the roughness level, the length ratio, the number of damaged tubes, and the number of total bifurcating levels. Another major finding is that the permeability increases with an increase in the diameter ratio. Besides, we found that the damaged position and the number of damaged tubes at the damaged position have an important effect on the permeability. Increasing the number of damaged tubes and bringing the damaged position close to the front end of the network will reduce the permeability. Compared with the undamaged network, the permeability of damaged network has a significant decline. The proposed model may provide potential applications for the analysis of fluid flow in damaged tree-like bifurcating network.

DO CEOS WITH SHARE PLEDGE SUPPRESS THE FIRMS’ INNOVATION?

It is a common phenomenon for corporate insiders to pledge their stock as collateral for personal loans in China. Using Chinese data, this paper examines the effects of CEOs’ share pledge on the firms’ future innovation output. Evidence suggests that the existence of CEOs with share pledge has a significantly negative effect on firms’ innovation output. The baseline results are consistent with a variety of robust tests. Furthermore, we propose the effect of CEOs’ share pledge works on the corporate innovation through the market value management channel. Finally, we find that the good corporate governance is a possible channel to relieve the agency cost on CEOs.

Comparative Transcriptome Analysis of Female and Male Fine-Patterned Puffer: Identification of Candidate Genes Associated with Growth and Sex Differentiation

Sexual growth dimorphism is a common phenomenon in teleost fish. However, the mechanism of this complex phenomenon remains unclear. The fine-patterned puffer (Takifugu poecilonotus; Temminck and Schlegel, 1850) exhibits female-biased sexual size dimorphism similar to other pufferfish. In this study, the transcriptomes of female and male T. poecilonotus were sequenced, 285.95 million raw read pairs were generated from sequence libraries. After identification and assembly, a total of 149,814 nonredundant unigenes were obtained with an N50 length of 3538 bp. Of these candidates, 122,719 unigenes (81.91% of the total) were successfully annotated with multiple public databases. The comparison analysis revealed 10,385 unigenes (2034 in females and 8351 in males) were differentially expressed between different sexes of T. poecilonotus. Then, we identified many candidate growth- and sex-related genes, including Dmrt1, Sox3, Spatas, Prl/Prlr, fabps, Ghr, and Igf1r. In addition to these well-known genes, Fabp4 was identified for the first time in fish. Furthermore, 68,281 simple sequence repeats (SSRs) loci were screened and identified in the transcriptome sequence of T. poecilonotus. The results of our study could provide valuable information on growth- and sex-associated genes and facilitate further exploration of the molecular mechanism of sexual growth dimorphism.

Free-to-Fee Transformation of Industrial Services

Industrial firms venturing into services is a common phenomenon in B2B markets. However, companies are often unable to monetize many such services, thus incurring high costs of service provision without benefiting from revenue generation in return. To address this critical but little-studied problem, we investigate how industrial firms can transform existing free services into for-fee offerings. Employing a theories-in-use approach, we explore leading global firms via a cross-section of B2B industries, including automotive, maritime, material handling, medical equipment, mining and construction tools, and petrochemicals. Contingent on the empirics, we precisely characterize and define free industrial services. Based on the internal and external challenges that firms face in free-to-fee (F2F) transformations, we develop a typology classifying free services into four distinct categories: Front-runners, Tugs of War, In-house Shackles, and Dead Ends. For each category, we provide empirical illustrations and identify critical actions and activities that firms deploy to successfully implement F2F transformations along the dimensions of structures, processes, people, and rewards. Thus, we offer guidance on how to overcome both external and internal challenges. Our findings demonstrate that F2F transformations of industrial services are not isolated marketing, sales, or pricing activities but require a concerted effort among all organizational functions involved.

Understanding the Spread of Sustained Employee Volunteering: How Volunteers Influence Their Coworkers’ Moral Identity Work

Employee volunteering has become a common phenomenon in many organizations. However, it is unclear how sustained volunteering spreads between colleagues. Drawing on an empirical study set in the English legal profession, this study examines the processes through which existing employee volunteers influence their coworkers to internalize a volunteer identity. The study yields a theoretical model that specifies how coworkers may identify existing volunteers as moral exemplars. Five forms of social influence emanate, often unknowingly, from these exemplars: encouraging, evoking, edifying, enacting, and exemplifying. These forms of social influence inform coworkers’ microprocess of moral identity work through which they claim a volunteer identity. This study thereby shifts attention from the well-theorized outcomes of moral identities to the largely unexamined social influences on moral identities in the workplace, enriching our understanding of the development of the moral self that is foundational to theories of volunteering and identity.

Secondary Epileptogenesis: Common to See, but Possible to Treat?

Secondary epileptogenesis is a common phenomenon in epilepsy, characterized by epileptiform discharges from the regions outside the primary focus. It is one of the major reasons for pharmacoresistance and surgical failure. Compared with primary epileptogenesis, the mechanism of secondary epileptogenesis is usually more complex and diverse. In this review, we aim to summarize the characteristics of secondary epileptogenesis from both clinical and laboratory studies in a historical view. Mechanisms of secondary epileptogenesis in molecular, cellular, and circuity levels are further presented. Potential treatments targeting the process are discussed as well. At last, we highlight the importance of circuitry studies, which would further illustrate precise treatments of secondary epileptogenesis in the future.

Phubber’s Emotional Activations: The Association between PANAS and Phubbing Behavior

Currently, mobile phones are widely used worldwide. Thus, phubbing rapidly became a common phenomenon in our social life. Phubbing is considered by the literature as a new form of technology-related addiction that may undermine interpersonal relationships and mental health. Our study contributed to exploring phubbers’ emotional activation as no other work has investigated it so far. Indeed, researchers have only explored phubbees’ but not phubbers’ emotional correlates. A sample of 419 Italian individuals (143 males) participated in our data collection on a voluntary basis. The results showed that phubbing is related to negative affects, but not to positive affects. Moreover, phubbing in both its components (i.e., communication disturbance, phone obsession) appeared to elicit an emotional activation similar to that of social media addiction. These findings may help in strengthening the discussion around the emotional consequences of virtual environment design, as well as the awareness about what happens at a relational level during phubbing.