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Premenstrual syndrome is associated with altered spontaneous brain activity in the late luteal phase, but the fluctuation patterns of brain activity throughout the menstrual cycle have not been revealed. Furthermore, it is also unknown whether the altered spontaneous brain activity during the whole menstrual cycle is further associated with their habitual use of maladaptive emotion regulation strategies. Based on the two reasons, electroencephalogram data and cognitive emotion regulation questionnaire from 32 women with high premenstrual symptoms (HPMS) and 33 women with low premenstrual symptoms (LPMS) were measured in the late luteal and follicular phases. Delta power, theta power, beta power, and the slow/fast wave ratios (SW/FW, including theta/beta power ratio [TBR] and delta/beta power ratio [DBR]) were calculated using both fixed frequency bands and individually adjusted frequency bands (based on the individual alpha peak frequency). The results showed that for the frontal and central DBR, as assessed both with fixed and individualized frequency bands, there was no difference between the two phases of the LPMS group, whereas there was a difference between the two phases of the HPMS group with a higher DBR in the late luteal phase than in the follicular phase. Further correlation results revealed that for women with HPMS in the late luteal phase, the frontal and central DBR values, as assessed both with fixed and individualized frequency bands, were positively correlated with self-blame and rumination. Consequently, HPMS was characterized by a fluctuation across the menstrual cycle in the DBR, which was further associated with maladaptive emotion regulation.

Intelligence is strongly associated with working memory. Working memory training can improve fluid intelligence, but the underlying mechanism requires further investigation. Because inhibition control may play a key role in working memory training, this study investigated this process from an electrophysiological perspective. In total, 40 children aged 9 to 11 years were enrolled and randomly divided into a training group (n = 20) and a control group (n = 20). The training group received 20 days of working memory training, whereas the control group did not receive any training. Before and after the training period, all participants were tested using Raven’s Standard Progressive Matrices (RSPM), and electrophysiological indicators were recorded while they performed go/no-go and Stroop tasks. The results revealed that relative to the control group, the training group had significantly improved RSPM scores in the test conducted after their training. For the go/no-go tasks, the training group exhibited a significant decrease in N2 amplitude, a significant increase in P3 amplitude, a significant decrease in theta band energy, and an improvement in response inhibition ability. No significant change was observed for the Stroop task. Correlation analysis revealed that an improvement in individual response inhibition can positively predict an improvement in fluid intelligence. These results suggest that working memory training enhances the fluid intelligence of children by enhancing their response inhibition ability.

Background Premenstrual syndrome (PMS) and depression co-occur frequently; however, their relationship remains controversial. This study was conducted primarily to discern heterogeneous patterns of such co-occurring symptoms in Chinese female university students, using a latent profile analysis (LPA), a person-centered statistical approach. Methods The PMS Scale and Beck Depression Inventory were used to examine self-reported PMS and depression symptoms in 701 Chinese female university students. LPA, multinomial logistical regression, and analyses of variance were adopted to investigate latent profiles and their validity. Results The LPA results indicated that a four-class solution characterized by low symptoms (57.2%), predominantly PMS (11.3%), predominantly depression (23.7%), and combined PMS–depression (7.8%) patterns fitted the data best. Age, first menstrual experience, and personality factors were associated with differences in nonparallel profiles characteristic of menstrual attitude. Limitations Use of self-report measures can lead to response biases; the cross-sectional design at a single time point limits the examination of changes in symptom characteristics and members within the category over time; and the specific age group limits the generalizability of results. Conclusion These results confirm that PMS is independent from depression, rather than a variant of depression, and can be used to resolve the controversy regarding the relationship between PMS and depression. The current findings highlight the need for identifying women at high risk for PMS and depression, and promoting interventions individually tailored to their symptom presentations.

Bound solitons have become a hot topic in the field of nonlinear optics due to their potential applications in optical communication, information processing and radar systems. However, the trapping of the cascaded bound soliton is still a major challenge up to now. Here, we propose and experimentally demonstrate a multi-pulse bound soliton fiber laser based on MoTe

Objectives: Previous studies revealed a positive association between neuroticism and depression. This study further extended the previous findings by exploring the psychological processes underlying this association among Chinese postgraduates. Guided by theoretical models and empirical research, we proposed a multiple mediation and moderated mediation model to investigate the roles of dispositional mindfulness and cognitive reappraisal in the relationship between neuroticism and depression.Methods: Using the NEO Five-Factor Inventory, Beck Depression Inventory, Mindfulness Attention Awareness Scale, and Emotion Regulation Questionnaire, 1103 first-year postgraduates at a comprehensive university in China were surveyed. Path analysis was adopted to test the models.Results: The results showed that dispositional mindfulness mediated the association between neuroticism and depression. Further, this mediating effect was moderated by cognitive reappraisal, with this effect being stronger in individuals with low engagement in cognitive reappraisal.Conclusion: The results support interrelations among neuroticism, depression, dispositional mindfulness, and cognitive reappraisal as moderated mediation rather than multiple mediation. The results enhance our understanding of psychological mechanisms between neuroticism and depression and provide suggestions for interventions to prevent or reduce depression in highly neurotic postgraduates.

Taking the perspective of others is critical for both human–human and human–robot interactions. Previous studies using the dot perspective task have revealed that people could automatically process what other people can see. In this study, following the classical dot perspective task, we showed that Chinese participants could not automatically process humanoid robot avatars’ perspective when only judging from self-perspective (Experiment 1) or randomly judging between self and avatar’s perspectives (Experiment 2), and people’s anthropomorphism tendency was related to the efficiency but not the automaticity of perspective-taking. These results revealed that human–human and human–robot interactions might be different in the basic visual process, and suggested the anthropomorphism tendency in people as an influential factor in human–robot interaction.

We report the first experimental observation, to the best of our knowledge, of soliton molecules in a robust all polarization-maintaining (PM) mode-locked fiber laser with a nonreciprocal phase bias that results in a low self-starting threshold and stable mode locking. Through elaborately tuning the waveplate in the cavity, calibrating the laser pulse from conventional soliton to soliton molecules is implemented, and versatile soliton molecules including harmonic soliton pairs, tightly or loosely bound soliton quartets, multipulse bound solitons are achieved and manipulated at different pump powers. Theoretical investigations are established to elucidate the soliton molecules spectral characteristics with various phase differences and time separations in the cavity that elicit good concurrence with achieved experimental results. The achieved results both rich the nonlinear dynamics in fiber lasers and pave the potential applications for this excellent architecture fiber laser.

Previous studies have reported that test anxiety is closely related to unreasonable cognitive patterns and maladaptive emotional responses. However, its underlying brain structural and functional basis has not been thoroughly studied. This study aimed to evaluate the potential difference in local gyration index (LGI) and corresponding resting-state functional connectivity (RSFC) in individuals with high test anxiety (HTA) compared with low test anxiety (LTA). Twenty-six individuals with HTA and 28 individuals with LTA underwent T1-weighted structural and resting-state functional magnetic resonance imaging scans. Using FreeSurfer software, we contrasted the LGI between the HTA and LTA groups using a surface-based general linear model to map group contrasts on a vertex-by-vertex basis. By selecting the cortical regions with significant differences in the LGI analysis as the regions of interest, the seed-based RSFC analysis was further carried out using the Resting-State fMRI Data Analysis Toolkit to examine the differences in the functional connectivity of these cortical regions with the whole brain between the two groups. The results showed that the LGI in several cortical regions of the executive control network (ECN) and the right lateral occipital gyrus was lower in the HTA group than in the LTA group. Furthermore, compared with the LTA group, the HTA group exhibited abnormal RSFC within the ECN, between the ECN and the visual network, and between the ECN and the sensorimotor network. Our findings might provide preliminary evidence for brain morphology and functional alterations in individuals with HTA and contribute to a better understanding of the pathophysiology of TA.

We report on a robust, erbium-doped ultrafast fiber laser mode-locked by an artificial saturable absorber (SA) based on nonlinear polarization evolution (NPE). Unlike previous NPE fiber lasers, our cavity employs all polarization-maintaining (PM) fiber so that the laser is insensitive against environmental fluctuations. By incorporating a phase shifter in the NPE artificial SA, the oscillator possesses self-starting mode-locking ability. However, it is difficult to start pulsed operation without such a phase shifter. The simple and novel fiber laser scheme utilizing above mentioned design can directly generate 0.11 nJ, 1.20 ps ultrashort pulses at a repetition rate of 115 MHz, which is the highest repetition rate in this type of fiber lasers. We believe that this fiber oscillator offers a promising source for high repetition rate applications under less stable conditions.

In this letter, we experimentally demonstrate various low-amplitude sub-pulses releasing from the rectangular-shaped noise-like pulses (NLPs) in a passively mode-locked fiber laser. Via incorporating a several hundred meters highly nonlinear fiber (HNLF) in the cavity, a series of continuous wave (CW) components are observed in the output optical spectrum, and sub-pulses formation results from the interactions among the CW components and the random ultrashort pulses in NLPs wave packet. A novel type of harmonic sub-pulses with 952.5874 MHz repetition rate is achieved, corresponding to the around 2994th harmonic of the fundamental cavity frequency. The obtained results contribute to further understanding the nature and formation mechanism of sub-pulses in NLPs regime.

We numerically demonstrate that noise properties of picosecond mid-infrared (mid-IR) supercontinuum (SC) in the anomalous region of a chalcogenide photonic crystal fiber (PCF) can be effectively controlled by a weak continuous wave (CW) trigger. Detailed simulation results show that in the mid-IR region, the characteristics of SC, including spectral bandwidth, temporal coherence, and signal-to-noise ratio (SNR), can be greatly enhanced by the CW trigger at selected wavelengths. The present study provides valuable insight into the CW-triggered mid-IR SC under the influence of modulation instability (MI) and stimulated Raman scattering (SRS).

The autonomic nervous system (ANS) is activated by stress and is closely related to the female menstrual cycle. Women with premenstrual syndrome (PMS) have an imbalanced ANS response in their premenstrual period. However, no studies have explored the reasons for the differences in ANS response among women. In this study, we investigated how the female menstrual attitude and acute social stress influence the ANS response in women with PMS. First, 277 women [24.35 ± 2.1] were selected to measure the mediating role of women's menstrual attitude between PMS severity and perceived ANS response. Second, participants' (50 women [23.23 ± 1.25] with and 46 women [22.92 ± 2.00] without PMS) heart rate (HR) and HR variability (HRV; reflecting the functioning of ANS) under social stress were measured during various menstrual cycle phases. The results indicated that menstrual attitude (bothersome and predictable) had mediating effects between the degree of PMS and perceived ANS response; when undergoing a high cognitive load (e.g. mental-arithmetic) task, the ANS of the PMS group demonstrated hypo-arousal and delayed recovery in the late luteal phase; Therefore, menstrual attitude could influence female perceived ANS response, which may be a risk factor for PMS. When women with PMS experience high-strength cognitive pressure in the premenstrual period, their ANS showed hypo-arousal and delayed recovery, which may be another risk factor for PMS.LAY SUMMARYThis study revealed that the attitude to menstruation (bothersome and predictable) could affect the women’s autonomic nervous system (ANS) response, and this may be a risk factor of premenstrual syndrome (PMS). Meanwhile, when women with PMS experience high-strength cognitive social pressure, their ANS showed hypo-arousal and delayed recovery. This imbalanced ANS reaction may result in their inability to cope with the stressful stimuli and emotional experiences, which may be another risk factor for PMS.

We experimentally demonstrated a stable unidirectional Tm3+-doped mode-locked fiber laser in a bidirectional oscillation setup, and the mode-locking operation between the clockwise and counterclockwise direction can be switched by adjusting the waveplates in the cavity.

Attentional control theory states that high test anxious (HTA) individuals suffer from impaired attentional control. However, through working memory training it may be possible to improve such individuals' attentional control ability. This study investigated whether 20 days of working memory training (with emotionally neutral stimuli) does result in improved HTA individuals' attentional control ability. Pre- and post-outcomes of attentional control were measured using Flanker and Go/Nogo experimental tasks in a test-related stress situation, and EEG data were also collected. Results only showed a significant decrease in Nogo alpha power in HTA individuals after neutral working memory training (i.e., post-outcome versus pre-outcome). However, we failed to provide evidence for beneficial transfer effects of neutral working memory training on enhanced task performance in both the Flanker and the Go/Nogo tasks. So, the present study demonstrates that neutral working memory training is clearly associated with important neurophysiological correlates while performing the Go/Nogo task, but the transfer effect is rather limited.

Attention bias contributes to the development and maintenance of test anxiety. However, little is known about the underlying mechanisms of attention bias, such as the relative contributions of the top-down and bottom-up cognitive processes. The bottom-up mechanism selects stimuli based on their physical salience, and regardless of the intention of observers. Besides, it remains unclear whether the attention bias in the test anxiety would extend in the visual search task in which numerous stimuli compete for attentional resources. Thus, the present research investigated these issues by combining the visual search task with eye-tracking techniques. The test-related pictures with varying threat levels may be the visual search target in the task-relevant condition, and be one of the distractors in the task-irrelevant condition. Thirty high and Thirty low test-anxious participants were required to attend a visual search task. Our results found that the low test-anxious group showed greater first fixation proportion and shorter dwell time towards test-related distractor within the target-absent condition. But we cannot find any effects of the high test-anxious group in the task-irrelevant condition. However, both groups showed a faster response and shorter target processing time of the test-related target, and the high test-anxious group had faster first fixation latency and greater first fixation proportion towards the high-threatening test-related target. These results suggested that the high test-anxious individuals showed early vigilance and improved processing efficiency towards the test-related target in a visual search task. Our findings indicated that ABs among numerous stimuli in test anxiety was not a completely bottom-up process.

Whether working memory training is effective in enhancing fluid intelligence remains in dispute. Several researchers, who doubt the training benefits, consider that placebo effects may be the reason for positive training gains. One of the vital variables that may induce the placebo effect is the mindset of intelligence. In this article, we provide a test of whether the mindset of intelligence leads to placebo effects in working memory training. Participants were overtly recruited and allocated to the growth mindset group or the fixed mindset group by Theories of Intelligence Scale scores. A single, 1 h session working memory training is the cue to introduce the placebo effects. During pre/post-testing, all participants completed tasks measuring working memory capacity (near transfer) and fluid intelligence (far transfer). Our findings show no significant difference between the two groups in both tasks. Therefore, these results suggest that the placebo effect does not exist in this study, which means individuals' mindset of intelligence may not be a contributor to the placebo effect in 1 h working memory training. This research will further help to clarify the mechanism of the placebo effect in working memory training.

Bound solitons have become a hot topic in the field of nonlinear optics due to their potential applications in optical communication, information processing and radar systems. However, the trapping of the cascaded bound soliton is still a major challenge up to now. Here, we propose and experimentally demonstrate a multi-pulse bound soliton fiber laser based on MoTe2 saturable absorber. In the experiment, MoTe2 nanosheets were synthesized by chemical vapor deposition and transferred to the fiber taper by optical deposition. Then, by inserting the MoTe2 saturable absorber into a ring cavity laser, the two-pulse, three-pulse and four-pulse bound solitons can be stably generated by properly adjusting the pump strength and polarization state. These cascaded bound solitons are expected to be applied to all-optical communication and bring new ideas to the study of soliton lasers.

We demonstrate a fiber Bragg grating (FBG) array based wavelength calibration scheme for Fourier domain mode-locked (FDML) laser. The wavelength interval and the temperature feedback module of the FBG array are designed to ensure the reference stability of the wavelength calibration scheme. Combined with the calibration scheme, the FDML laser with a tunable wavelength range of ∼60 nm, a center wavelength of 1300 nm and a sweep frequency of 39.63 kHz is built up to demonstrate its feasibility. The FBG wavelength demodulation based on the calibrated FDML laser system shows a wavelength resolution of 2.76 pm and hourly stability of 10.22 pm.

Attention bias (ABs) to threat is essential in the etiology and maintenance of test anxiety. However, little is known about the attention pattern of ABs in test anxiety. The stimulus duration affects the attention pattern in anxiety. Thus, the present research combined the dot-probe paradigm and event-related potentials (ERPs) and varied the stimulus duration (100 ms or 500 ms) to test the ABs in test anxiety. Consequently, both groups showed a threat N2pc in 100 ms and 500 ms duration, suggesting that both groups allocated attention to the test-related threat. However, in the 100 ms duration, the high test-anxious (HTA) group had smaller target-elicited P1 and greater target-elicited N2 in the threat-congruent condition than in the neutral condition. In the 500 ms duration, an earlier threat N2pc and a threat PD followed a greater target P1, and smaller target N2 were pronounced in the HTA group. The current results provided electrophysiological evidence that the HTA group kept a dynamic attention pattern that fluctuated shift between vigilance and avoidance in the 100 ms and 500 ms duration. The HTA group was more vigilant than the LTA group in the 500 ms duration when strategic attention was concerned, proposing that vigilance in test anxiety was not an automatic process.

This study examined the effects of test anxiety on working memory capacity. Studies have demonstrated that individuals with trait social anxiety disorder exhibit increased visual working memory capacity and that those with trait anxiety exhibit decreased working memory capacity. Test anxiety may also induce unique effects on individuals' working memory capacity, and we thus employed the change detection task to explore such effects. Participants were divided into high- and low-test anxiety groups. We used K score and contralateral delay activity (CDA) amplitude to measure working memory capacity, focusing on processing effectiveness and efficiency. The study results revealed that deficits in the working memory capacity of individuals in the high test anxiety group manifested in the CDA amplitude rather than in the K score. The CDA amplitude of the high test anxiety group did not increase after load 3, and that of the low test anxiety group did not increase after load 4. No difference was observed in the K scores of the two groups. The study concluded that test anxiety impairs processing efficiency but not processing effectiveness.

Individuals with high test anxiety (HTA) have deficits in attentional control and in stress responses when faced with tests. However, little is known about the underlying neural mechanism. Anterior cingulate cortex (ACC) is involved in both attention and emotion networks, therefore this study examined the neural functional dysregulation in test anxiety from the perspective of functional connectivity (FC) using bilateral ACC as the regions of interest.Fifty-one participants were divided into HTA (n = 23) and low test anxiety (LTA, n = 28) group according to their Test Anxiety Scale (TAS) scores. Brain imaging data in resting, preparing, and recovering phases of a modified social evaluative threat task were collected, and emotional changes were assessed.Compared with the LTA group, the HTA group exhibited significantly lower FCs between the ACC and superior frontal gyrus (SFG) in all 3 phases, significantly lower FCs between the ACC and inferior parietal gyrus (IPG), and significantly higher FCs between the ACC superior temporal gyrus (STG) in the preparing phase. Moreover, in the HTA group, the resting state IPG-ACC FC was associated with their TAS score, the preparing state STG-ACC FC was associated with the increased anxiety.Individuals with HTA have general prefrontal control deficits. When facing a test, they tend to recruit more resources to deal with high emotional interference. The dysregulated control of the ACC by the frontal-parietal network may underlie the pathophysiology of test anxiety.

We experimentally demonstrated a simplified NPE mode-locked fiber laser supporting both quasi-coherent noise-like and conventional soliton pulse emission in a single laser cavity. The dual-color pluses were separated and analyzed in detail.

Up to 80% women report physical and emotional symptoms before menstruation and some of them may be diagnosed as Premenstrual Syndrome (PMS). However, the current understanding of the neurobiological mechanisms underlying PMS and the influence of menstrual cycle on emotion is limited. Here we test the hypothesis that frontal alpha asymmetry (a neurophysiological indicator for emotional motivation reactivity) differs between women with and without PMS during resting and emotional state in the early and late phases of a menstrual cycle. Frontal electroencephalographic (EEG) activity was assessed in women with PMS and without PMS. They were assessed during a resting and emotional state in their mid-late luteal phase and late follicular phase. The resting frontal alpha asymmetry was considered as trait and the emotional state consisted of emotive picture stimuli. This study found that women with PMS had a lower frontal alpha asymmetry score during resting state than women without PMS in both phases. During the emotional state, the PMS group had a lower frontal alpha asymmetry score when processing the positive pictures, but a higher frontal alpha asymmetry score when processing the negative pictures, when compared to women without PMS. The menstrual cycle showed little influence on emotional state. The results revealed a neurophysiological dysfunction in the emotional motivation system of women with PMS, which likely contributes to their stronger negative emotional symptoms.

Previous studies have revealed stress-induced dysregulation of hypothalamic-pituitary-adrenal (HPA) axis in women with premenstrual syndrome (PMS). So far, however, the results about the relationship between HPA axis dysregulation and PMS are mixed. To this end, it is necessary to investigate the basal activity of the HPA axis in women with PMS instead of only assessing a certain stressor. Therefore, this study evaluated the relationship between the cortisol awakening response (CAR) and PMS. Thirty-two women with PMS (mean age 22.47 ± 2.20 years) and 36 healthy controls (mean age 22.28 ± 2.43 years) were included in this study. Saliva samples of our participants were collected successively at 0, 30, 45, and 60 min after awakening to assess CAR during each of two phases of the menstrual cycle (the mid-follicular phase and the late luteal phase). The results showed a significantly attenuated CAR in women with PMS compared with the healthy controls, especially at 45 and 60 min after awakening, regardless of the menstrual cycle phases. Furthermore, there was a significant negative correlation between PMS severity as measured by PMS scale and AUCi (i.e. the Area Under the Curve with respect to increase) in the mid-follicular phase. Our findings suggested that an attenuated CAR activity profile may be an important risk factor for the development of PMS.

Modulation of adaptive executive control is particularly demanded in a pre- and early-school period. Therefore, in the present study, we investigated whether affective information can influence executive control in preschool children. We have recorded EEG during a Go/Nogo task where gender of a face served as a Go/Nogo cue and emotional expressions (positive, negative, neutral) were task irrelevant. Negative emotions modulated the magnitude of the conflict effect (Nogo vs. Go) in the N200 relative to neutral control, indicating enhanced cognitive control for negative emotions. Moreover, interpersonal characteristics (e.g., aggressive behavior) correlated with the emotion facilitated inhibitory control as indicated by N200. In addition, Go/Nogo conflict modulated neural responses in children already 100 ms after stimulus onset when paired with socially relevant emotional stimuli. These results show that emotions affect cognitive control in this age group in a valence specific manner.

Objective: To investigate the diversity of experiences of sadness emotion and physiological responses among female college students with high neuroticism (HN) and low neuroticism (LN) during the late luteal phase (LLP) and early follicular phase (EFP). Methods: Forty-two participants were classified as the HN group and 41 as the LN group based on their neuroticism score (Eysenck Personality Questionnaire Short Scale for Chinese). Participants watched sadness-inducing experimental films during the LLP and EFP. Results: The HN group showed similar sadness intensities in both phases. The LN group showed higher sadness intensity in the LLP than the EFP. The LN group's sadness scale assessments were lower than the HN group in both phases. The blood volume pulse in the HN group fell in both the LLP and EFP (both P .05). Between-group comparisons showed heart rate was significantly lower in the HN group than the LN group during EFP (P = .009), but there were no statistically significant differences in subjective experience and physiological data during LLP. The HN group had stronger sadness feelings and greater sadness arousal than the LN group during EFP. There were significant associations between menstrual cycle-related changes in sadness ratings and changes in physiological outcomes. Conclusion: Women with HN have less fluctuation in sadness than those with LN during the menstrual cycle, but experience strong sadness feelings in the LLP. Women with HN show stronger physiological responses in the EFP than those with LN, and have the highest responses in the LLP. Keywords: Neuroticism, Menstruation, Sadness, Emotional responses

We report our investigation on the S-shaped current–voltage characteristics in a hot-casting–processed (BA)2 (MA)3Pb4I13 Ruddlesden–Popper (RP) perovskite solar cell. The two-dimensional perovskite solar cells are fabricated with NiOx as the hole transport layer (HTL), which leads to significantly high open-circuit voltage (Voc). The champion device shows a Voc of 1.21 V and a short current density (Jsc) of 17.14 mA/cm2, leading to an overall power conversion efficiency (PCE) of 13.7%. Although the PCE is much higher than the control device fabricated on PEDOT:PSS, a significant S-shaped current–voltage behavior is observed in these NiOx-based devices. It is found that the S-shaped current–voltage behavior is related to the lower dimensional phase distribution and crystallinity at the bottom interface of the RP perovskite layer, and the S-shaped distortion is less severe after the device ageing test.

Quarantine and isolation at extended length, although considered as highly effective countermeasures for the novel coronavirus (COVID-19) which started at the end of 2019, can have great impact on individual's mental health, especially emotional state. The present research recruited 5,115 participants from the general public across 32 provinces and autonomous regions in China in an online survey study, about 20 days after the lockdown of the epicenter (Wuhan), to investigate the relationship between the length of the quarantine and negative affect (including depression and anxiety), as well as the mediating roles of negative cognition (including worry and anticipation), and the moderating roles of dispositional optimism, tolerance of uncertainty, social support, and healthy behavior. The results showed that: (1) Worry and anticipation mediated the relationship between quarantine length and depression and anxiety; (2) Dispositional optimism moderated the path coefficients of quarantine length to worry, worry to anxiety, and anticipation to depression; (3) Tolerance of uncertainty moderated the path coefficient of worry to anxiety; (4) Social support moderated the path coefficient of anticipation to anxiety. In conclusion, during quarantine, dispositional optimism, uncertainty tolerance, and social support can buffer the direct or indirect effects of quarantine length on depression and anxiety. These findings could have profound implications on the societal responses to COVID-19 and future pandemics.

For the first time, to the best of our knowledge, we experimentally observed a novel quasi-coherent noise-like pulse (NLP) in a simplified nonlinear polarization evolution mode-locking fiber laser when appropriate polarization was maintained for the lasing light through a three-dimensional rotatable polarization beam splitter inside the cavity. The degree of first-order coherence was evaluated after an interferogram measurement. The evolution of the measured shot-to-shot spectrum revealed that the NLPs possess quasi-coherence. Self-starting ultrafast soliton pulses switching to quasi-coherent NLPs at higher pump power levels were due to the preservation of the soliton features, mainly the Kelly sidebands in the spectrum. Quasi-coherent NLPs with average power of 56.58 mW and 10.4% slope efficiency were achieved with single pulse energy of 3.22 nJ.

Objectives A second outbreak of COVID-19 happened in China. We assessed the impact of quarantine duration on psychological outcomes and vaccination intention. Methods A cross-sectional online survey was employed. Participants were invited to complete the measurement of quarantine duration, social distancing, psychological distress, wellbeing (WHO-5), and vaccination intention. Multiple linear and logistic regression was used to examine the relationship between quarantine duration and social distancing, psychological distress, wellbeing, as well as vaccination intention. Results Of the 944 participants, 17.2% (7.8% quarantined for 1–7 days and 9.4% quarantined for > 7 days) of the sample have been quarantined. Quarantine for 1–7 days raised the social distancing(β = 2.61 95% CI 1.90–3.33) and vaccination intention (OR = 2.16 95% CI 1.22–3.82) .While quarantine for > 7 days was associated with the increases the social distancing(β = 3.00 95% CI 2.37–3.64) and psychological distress (β = 1.03 95% CI 0.22–1.86), and the decrease of wellbeing(β = 1.27 95% CI 0.29–2.26). Conclusions Longer quarantine duration reported a greater impact on social distancing and psychological distress, and a poorer wellbeing during the second COVID-19 pandemic. Quarantine for 1–7 days associated with the increase of vaccination intention. The duration of quarantine should be considered when preparing for immunization programs and preventing psychological disorders during COVID-19 pandemic.

Spatial communications are essential to the survival and social interaction of human beings. In science fiction and the near future, robots are supposed to be able to understand spatial languages to collaborate and cooperate with humans. However, it remains unknown whether human speakers regard robots as human-like social partners. In this study, human speakers describe target locations to an imaginary human or robot addressee under various scenarios varying in relative speaker–addressee cognitive burden. Speakers made equivalent perspective choices to human and robot addressees, which consistently shifted according to the relative speaker–addressee cognitive burden. However, speakers’ perspective choice was only significantly correlated to their social skills when the addressees were humans but not robots. These results suggested that people generally assume robots and humans with equal capabilities in understanding spatial descriptions but do not regard robots as human-like social partners.

Attentional control theory regards individuals with high anxiety as having deficits of inhibitory control when faced with distractors, especially under high-load conditions and with threatening distractors. Research on test anxiety has a long history, but the working memory (WM) characteristics of individuals with high test anxiety (HTA) remain unclear. We used two experiments to test the WM filtering ability of individuals with HTA, and the salient results were those of the contralateral delay activity amplitude rather than K score. The first experiment employed neutral distractors. HTA participants filtered distractors under low-load conditions but not under high-load conditions. Participants with low test anxiety (LTA) filtered distractors under high-load conditions but not under low-load conditions. The second experiment utilized threatening distractors. The participants with HTA exhibited deficits in their ability to filter neutral and threatening distractors, whereas the participants with LTA filtered both types of distractor.

We theoretically and experimentally demonstrate the gigahertz supercontinuum combs generated by a two-pulse bound state. The repetition rate is about 18.75 GHz and the combs extend over 270 nm.

Controversy exists as to whether high test anxiety (HTA) individuals, when completing an inhibition task, increase or decrease top-down attentional control resources to maintain high task performance. In a flanker task experiment, individuals were confronted with a threat or no threat context in combination with a low or a high working memory load. The N2 measured top-down attentional control resource allocation. The results showed that, in comparison to low test anxiety (LTA) individuals, HTA individuals had larger N2 amplitudes in a no threat condition, especially for incongruent trials. Also, in a threat condition when under high working memory load, HTA individuals had smaller incongruent N2 amplitudes. These findings support the conclusion that HTA individuals tend to enhance recruitment of top-down attentional control of inhibition. Additionally, they may also fail to compensate for impaired inhibition as indicated by impoverished top-down attentional control resources when demands on attentional control are high.

We theoretically and experimentally demonstrate the generation of comb-like supercontinuum by inputting the two-pulse bound state. Through detailed dispersion optimization, the flatness, comb depth and bandwidth can be improved.

Via three-dimensionally rotating a polarization beam splitter in the cavity, quasi-coherent noise-like pulses were experimentally demonstrated in a simplified NPE mode-locked fiber laser. The degree of first-order coherence was evaluated by an interferogram measurement.