Actions in phygital space: Work solidarity and collective action among app-based cab drivers in India

This study delineates the microprocesses of solidarity development and the subsequent collective actions of gig workers in India amidst multiple structural constraints. Using netnography, semi-structured interviews and direct observation, we show how digitally naive app-based cab drivers amalgamate physical and digital spaces, construct a phygital space free of managerial gaze and leverage it to bond and bridge, create webs of care and share and resist multiple oppressive forces, individually and collectively. Thus, we broaden the conceptualisation of worker agency beyond labour-management antagonism and extend the extant literature on solidarity development and resistance in gig work by identifying a spatial enabler, phygital free space and the expansive role of relationship-based commitment. Relationship-based commitment not only functions as a membership mobiliser but also helps mobilise collective resistance when interwoven with an external threat-based identity created through injustice framing.     

等离子喷涂梯度耐热陶瓷涂层的研究展望

主要概述了耐热梯度陶瓷涂层的研究现状 ,阐述了耐热梯度陶瓷涂层的制备、组织和性能研究的成果和存在的问题 ,并提出了耐热梯度陶瓷涂层发展的新方向     

多相流海底管道内腐蚀评价方法研究

为明确海底多相流管道内腐蚀情况,采用了管道内腐蚀直接评价方法。了解该方法的重要意义,预测海底多相流管道内腐蚀风险位置和腐蚀频率,并进行腐蚀实验检测分析,计算出管道的使用寿命和管道剩余量,保证多相流管道安全使用,提高海底管道的安全性。     

Dynamics of contention in the gig economy: Rage against the platform,customer or state?

Protest in the gig economy has taken many forms and targets (platforms, customers and state officials). However, researchers are yet to adequately account for this diversity. We use a European survey of Upwork and PeoplePerHour platform workers to investigate worker orientation towards different forms of protest. Results reveal that worker anger, dependence and digital communication shape contention in the remote gig economy. Support for collective organisation is associated with anger at platforms as well as their dependence on the platform and communication with other workers. Individual action against clients is associated with anger and communication but not dependence. Support for state regulation is associated only with anger but not dependence or communication. We conclude that the relational approach entailed by Mobilisation Theory can aid explanation in the gig economy by shedding light on the dynamic process by which solidarity and dependence alter the perceived cost/benefits of particular remedies to injustice.     

纤维素酶处理对针织牛仔性能的影响

为了解决机械摩擦导致的织物表面光洁度和手感差的问题,基于纤维素酶与机械摩擦复合处理织物的优点,采用酸性纤维素酶对牛仔布进行水洗,通过正交试验设计,探索了纤维素酶浓度、浸泡温度、浸泡时间、pH值对织物白度、耐磨性、顶破强力和弯曲性能的影响。结果表明,温度及pH值对白度的影响显著,纤维素酶浓度对织物顶破强力的影响大于其他因素。用纤维素酶处理后,针织牛仔的耐磨性增强,白度增大。因此,纤维素酶可使针织牛仔的使用性能得到有效改善。     

不同岩性尾矿砂混凝土性能的研究

分析超贫钒钛磁铁矿、片麻岩、矽卡岩的尾矿砂成分,研究分析不同岩性尾矿砂混凝土的抗压强度、抗渗性能、抗冻性能、碳化性能。试验结果表明:不同岩性尾矿石粉在体系中可能充当胶结的作用,可提高混凝土抗压强度;试验对比了抗氯离子试验,得出超贫钒钛磁铁矿砂混凝土的抗氯离子渗透性能最优;C30强度等级的各组混凝土可满足F150抗冻等级的要求,C50强度等级的各组混凝抗冻等级可达到F300的要求;不同岩性尾矿砂混凝土试件的碳化深度主要受微孔结构密实程度的影响,只要配制的混凝土级配合理、密实度良好,一般细集料对混凝土碳化性能没有影响。研究成果可为不同岩性尾矿砂混凝土的深入研究和实际工程应用提供参考。