No abstract

In this paper, we propose a hierarchical bidirectional Gated Recurrent Unit (GRU) network with attention for human emotion classification from continues electroencephalogram (EEG) signals. The structure of the model mirrors the hierarchical structure of EEG signals, and the attention mechanism is used at two levels of EEG samples and epochs. By paying different levels of attention to content with different importance, the model can learn more significant feature representation of EEG sequence which highlights the contribution of important samples and epochs to its emotional categories. We conduct the cross-subject emotion classification experiments on DEAP data set to evaluate the model performance. The experimental results show that in valence and arousal dimensions, our model on 1-s segmented EEG sequences outperforms the best deep baseline LSTM model by 4.2% and 4.6%, and outperforms the best shallow baseline model by 11.7% and 12% respectively. Moreover, with increase of the epoch's length of EEG sequences, our model shows more robust classification performance than baseline models, which demonstrates that the proposed model can effectively reduce the impact of long-term non-stationarity of EEG sequences and improve the accuracy and robustness of EEG-based emotion classification.

Drought and flooding during grain filling have become major constraints to wheat quality and yield. The impacts of water deficits and waterlogging during the grain filling on contents of high‐molecular‐weight glutenin subunits (HMW‐GS) and of glutenin macropolymers (GMP) in grains of the winter wheat cultivar Yumai 34 with high grain protein content (GPC) and Yangmai 9 with low GPC were studied. At maturity, GPC was higher under drought and lower under waterlogging compared to the control, while contents of GMP and HMW‐GS were reduced by the two water‐stress treatments. The contents of both HMW‐GS and GMP were higher in Yumai 34 than in Yangmai 9. A drought event after anthesis increased the accumulation of HMW‐GS during the early grain filling stage. By contrast, waterlogging reduced the accumulation of HMW‐GS during the whole grain filling phase. At maturity, the HMW‐GS and GMP to protein ratios were also depressed under the two water‐stress events, while the HMW‐GS to GMP ratio was very close between the three treatments in Yumai 34 and much higher under the control than the drought and waterlogging treaments in Yangmai 9. It is concluded that the variation in GMP content with various water‐stress treatments is attributed to the changing in accumulation of HMW‐GS in the grain.

With the smoking epidemic in China, the role that health care providers (HCPs) could play in tobacco control will be critical. As a preliminary step, this study identified smoking behavior, knowledge, attitudes, and practice (KAP) regarding smoking and smoking control among HCPs in Changsha city, China. The study design was cross-sectional. The instruments - Demographic Information Scale and KAP Scale - were distributed to 420 physicians and 400 nurses in four hospitals in Changsha city. The effective response rate was 77.56% (636/820). Among the respondents, 20.8% were current smokers, which represented 35.7% of the physicians and 1.4% of the nurses, and 43.0% of the males and 1.2% of the females. The mean knowledge score was 22.3+/-4.4 (n = 30). Knowledge regarding smoking's harmful effects and smoking-related respiratory system diseases was high. Nonetheless, tobacco addiction was underestimated. The mean attitudes and practice score was 17.7+/-2.3, 15.1+/-3.4 (n = 20). Eighty-seven percent approved their role in smoking control, but only 45% HCPs practically informed patients about methods of smoking cessation. Smoking behavior was negatively associated with KAP, and 59.7% of the HCPs thought that inadequate knowledge affected their practice. In conclusion, HCPs had some knowledge and positive attitudes regarding the cessation of smoking, but were relatively unoptimistic regarding putting smoking control into practice. The high smoking rate among male HCPs and knowledge insufficiency about smoking may pose barriers in tobacco control efforts for HCPs. As such, interventions for the cessation of smoking, and continual education on smoking control for HCPs, are indicated in China.

No abstract