This research proposes a modified metaheuristic optimization algorithm, named as improved stochastic fractal search, which is formed based on the integration of the quasiopposition-based learning and chaotic local search schemes into the original SFS algorithm for solving the optimal capacitor placement in radial distribution networks. The test problem involves the determination of the optimal number, location, and size of fixed and switched capacitors at different loading conditions so that the network total yearly cost is minimized with simultaneous fulfillment of operating (...) constraints. Also, the hourly on/off scheduling plans of switched shunt capacitors considering a modified cost objective function are obtained. The proposed ISFS algorithm has been tested on two IEEE 69-bus and 119-bus RDNs and a practical 152-bus RDN. For clarifying the effectiveness and validation of the ISFS, the simulated results have been compared with those of other previously utilized solution approaches in the literature as well as the original SFS. From result comparison, the proposed ISFS outperforms other previous approaches regarding solution quality and statistical performance for the compared cases, especially in the complex and large-scale networks. Notably, compared with the original SFS, the proposed ISFS shows a significantly better performance in all the tested cases. (shrink)

The digital era brings various benefits to adolescents. However, operating on the digital environment without sufficient knowledge and skills will expose them to multiple types of risks, especially in the country with low digital safety education rate like Vietnam. The current study examines factors that can contribute to cultivating adolescents’ digital resilience using the information-processing reasoning of the Mindsponge Theory. A UNESCO dataset of 1061 Vietnamese high school students was analyzed using the Bayesian Mindsponge Framework analytics. It is found that (...) adolescents’ daily Internet usage frequency, parents’ Internet safety guidance, and teachers’ safety guidance are positively associated with digital resilience. However, the effects of parents’ and teachers’ Internet safety guidance on digital resilience are conditional on the daily Internet usage frequency. Parents’ guidance only enhances adolescents’ digital resilience if they use the Internet less than four hours per day. In contrast, the positive effect of teachers’ guidance on adolescents’ digital resilience becomes stronger when the students spend more time on the Internet (more than 1 hour). Based on these findings, we suggest that adolescents can learn to minimize risks and protect themselves by exposing more to the digital environment. Parents’ and teachers’ supports are important in enhancing adolescents’ capability to deal with digital threats, but types of supports need to be carefully considered to avoid reverse impacts on adolescents’ resilience. (shrink)

In this paper examines the roles and influence of China in the world and, mainly, in European Union. For a decade, Chinese investors have been looking for opportunities to buy european assets. Especially since the beginning of the 2008 crisis we observed an increase of investment activities of Chinese companies. During the crisis, cash troubled european companies due to loss of liquidity were forced to sell their shares at significant discount. Over time, with stabilizing the economic situation in Europe, European (...) companies asset prices seemingly ceased to be cheap, nevertheless a volume of Chinese FDI to Europe continued to grow. Our goal will be detailed insight into these investments and try to identify the benefits and risks of these investments. Moreover, this paper not only provide insight into economic development of Chinese FDI but also take into account political issues and background of these investment. As far as a methodology is concerned, the basis of our work will be comparing an impact of Chinese investments in European countries and their impact on economic development in selected countries. In particular, we are interested in the behavior of Chinese investors and their motivation to buy in Europe. At the same time it will also be interested in the motives of European companies that have decided to sell shares to new owners. Finally, we will also examine ways in which Chinese investors proceed with acquisitions in the EU. Data comes from Eurostat, the national statistical offices and stock market prices. We will also be examining the political influence on these countries individually and globally, therefore as part of the EU. Based on the gained information we will try to assess the current situation of China’s influence in the euro area and at the same time try to estimate its future impact. Finally, based on the detected information to analyze the results of our research. (shrink)

Recent studies show that returning global health trainees often report having felt inadequately prepared to deal with ethical dilemmas they encountered during outreach clinical work. While global health training guidelines emphasize the importance of developing ethical and cultural competencies before embarking on fieldwork, their practical implementation is often lacking and consists mainly of recommendations regarding professional behavior and discussions of case studies. Evidence suggests that one of the most effective ways to teach certain skills in global health, including ethical and (...) cultural competencies, is through service learning. This approach combines community service with experiential learning. Unfortunately, this approach to global health ethics training is often unattainable due to a lack of supervision and resources available at host locations. This often means that trainees enter global health initiatives unprepared to deal with ethical dilemmas, which has the potential for adverse consequences for patients and host institutions, thus contributing to growing concerns about exploitation and “medical tourism.” From an educational perspective, exposure alone to such ethical dilemmas does not contribute to learning, due to lack of proper guidance. We propose that the tension between the benefits of service learning on the one hand and the respect for patients’ rights and well-being on the other could be resolved by the application of a simulation-based approach to global health ethics education. (shrink)

With advances in medical technology, the potential uses for human blood have proliferated, and in turn, so has the demand for blood. Blood and blood products circulate in a medical marketplace as a `good' that can be bought and sold to meet various health and commercial demands. Nevertheless, its point of origin — or `production' — remains the individual human body, and reliance on voluntary blood donation remains a cornerstone for meeting this growing market demand. This article examines the contradictions (...) surrounding blood donation in the ethnographic context of contemporary urban China. Specifically, it focuses on both how the circulation of blood outside the individual body interfaces with its circulation in the Chinese social body, and how individual Chinese conceptualize their acts of donation in this process. In ethnographic interviews for this project, many urbanites describe donation as both voluntary and as meeting a social obligation. Yet their donation practices remain structured by meeting work unit quotas and are compensated with monetary and food donations and paid time off. Their descriptions of the mechanisms for motivating and compensating donors echo the socialist calls for contributing to society's greater good typical of the Maoist era propaganda. These descriptions highlight the complexities of sociocultural change in what has come to be described in much of the literature as a `postsocialist' Chinese society characterized by a burgeoning consumer culture and increasing emergence of individual autonomy. Our interviews suggest that the socialist workplace remains a critical social and economic structure in China through which workers' production is transformed into a social `good'. This transformation originates within the individual bodies of workers (not on the factory floor) and is extracted through exhortations to contribute to better society via the work unit and one's obligations to the work unit. Rather than a shift to individual autonomy and self-improvement, or a re-emergence of traditional values — both of which have been described as hallmarks of the postsocialist era — this process highlights the role that the socialist work unit plays in defining Chinese citizenship, consumer culture and embodied desires. (shrink)

Transformer is a neural machine translation model which revolutionizes machine translation. Compared with traditional statistical machine translation models and other neural machine translation models, the recently proposed transformer model radically and fundamentally changes machine translation with its self-attention and cross-attention mechanisms. These mechanisms effectively model token alignments between source and target sentences. It has been reported that the transformer model provides accurate posterior alignments. In this work, we empirically prove the reverse effect, showing that prior alignments help transformer models produce (...) better translations. Experiment results on Vietnamese-English news translation task show not only the positive effect of manually annotated alignments on transformer models but also the surprising outperformance of statistically constructed alignments reinforced with the flexibility of token-type selection over manual alignments in improving transformer models. Statistically constructed word-to-lemma alignments are used to train a word-to-word transformer model. The novel hybrid transformer model improves the baseline transformer model and transformer model trained with manual alignments by 2.53 and 0.79 BLEU, respectively. In addition to BLEU score, we make limited human judgment on translation results. Strong correlation between human and machine judgment confirms our findings. (shrink)