Subjects: Biology >> Zoology submitted time 2023-11-30 Cooperative journals: 《古脊椎动物学报》
Abstract： We report here a number of mandibular, maxillary and dental fossil remains of Indian Suoidea from the Middle Siwalik of Haritalyangar area in Bilaspur District of Himachal Pradesh, North India. Haritalyangar is well known for the diversity of the Late Miocene fauna and the hominoids and other primates. The suoid remains were collected by one of the authors (ARS) during different field seasons and their localities were plotted on the map, along with those of the proboscidean reported recently, including the hominoid localities. The fossil localities are spread over the ‘Lower Alternations’ and the ‘Upper Alternations’ from Makkan Khad to Sir Khad. We have assigned the fossils into three genera, Propotamochoerus (P. hysudricus), Hippopotamodon (H. sivalense) and Yunnanochoerus (Y. dangari). Propotamochoerus hysudricus represents the most common suid in the Middle Siwaliks. The new remains of the suoid Yunnanochoerus dangari further documents this rare palaeochoerid only known in the Haritalyangar area by a few fossils. The new suoid remains show clear affinities with the Nagri fauna of the Pakistan Siwaliks. Biochronological correlations with the Potwar Plateau based on suoids indicate an age bracket of ~10–9 Ma for the ‘Lower Alternations’ of Haritalyangar, close to the bracket mostly recently proposed on the basis of magnetic polarity stratigraphy.
Subjects: Nursing >> Nursing submitted time 2023-11-30
Abstract： This case analysis discussed the nursing process of a patient with diabetes complicated with acute heart failure. Diabetes combined with heart failure increased the complexity of patients and nursing challenges. Through comprehensive nursing evaluation, the nursing team effectively addressed the physiological and psychological needs of patients. In terms of cardiovascular monitoring, diabetes management, oxygen therapy and psychological support, scientific intervention measures have been implemented to control and improve patients' condition. The evaluation of nursing effectiveness shows that the patient's physiological indicators gradually stabilize, and blood sugar and cardiovascular status are effectively controlled. This case emphasizes the importance of a comprehensive nursing model in complex disease management, providing experience and inspiration for the care of similar diseases.
Peer Review Status:
Awaiting Review
submitted time 2023-11-30
Abstract： This article summarizes the effect observation and nursing experience of a case of postoperative bowel cancer treated with Chinese ointment and Chinese medicine retention enema. Based on the theory of TCM syndrome differentiation and care, the patient's symptoms of abdominal distension and constipation were significantly alleviated and the clinical symptoms of abdominal distension and constipation were improved by the combination of TCM ointment and TCM retention enema treatment and routine nursing measures such as diet guidance, emotional nursing, daily living nursing and health knowledge education.
Peer Review Status:Awaiting Review
Subjects: Physics >> Interdisciplinary Physics and Related Areas of Science and Technology submitted time 2023-11-30
Abstract： Based on the energy conversion of the dynamic electric effect from the solid/liquid contact double
electric layer is the dynamic electromotive potential, this paper studies the static appearance and the release of
the electric field energy of the solid/liquid contact double electric layer, so a special capacitor (P/L/N capacitor) of
solid conductor P / polar liquid L / solid conductor N is constructed. The observations based on experiments are as
follows: (i) the contact double electric layer derived from the internal potential difference polarization of the solid
conductor / polar liquid is equivalent to the external electric field polarization of the ordinary capacitor. The
formation process of the contact double electric layer is the spontaneous charging process of the P/L/N capacitor,
and the P/ L/N capacitor still shows the electric field energy of the contact double electric layer. (ii) Because the
polarized external potential difference of the solid conductor / polar liquid contacting the double electric layer is
always less than the internal potential difference, the short-circuit P/L/N capacitor also has a continuous
electromotive force after the discharge, statically releasing the electric field energy contacting the double electric
layer. (iii) The contact double electric layer of solid conductor / polar liquid is produced spontaneously caused by
mutual contact, and it is also a self-organizing process of absorbing the environmental heat energy into the electric
field energy of the contact double electric layer. P/L/N capacitors realize thermoelectric conversion by releasing
the electric field energy of the contact double electric layer. The above-mentioned phenomenon provides the
possibility for the development of self-generated capacitors and self-supplied power supply.
Keywords: Solid conductor/polar liquid; contact with double electric layer; thermoelectric conversion,
Peer Review Status:Awaiting Review
Subjects: Physics >> Nuclear Physics submitted time 2023-11-29
Abstract： The phenomenology involved in severe accidents (SA) in nuclear reactors is highly complex. Currently, integrated analysis programs used for severe accident analysis heavily rely on custom empirical parameters, which introduce considerable uncertainty. Therefore, in recent years, the field of severe accidents has shifted its focus toward applying uncertainty analysis methods to quantify uncertainty in safety assessment programs, known as "best estimate plus uncertainty (BEPU)." This approach aids in enhancing our comprehension of these programs and their further development and improvement. This study concentrates on a third-generation pressurized water reactor (Gen-III PWR) equipped with advanced active and passive mitigation strategies. Through an Integrated Severe Accident Analysis Program (ISAA), numerical modeling and uncertainty analysis were conducted on severe accidents resulting from large break loss of coolant accidents (LBLOCA). Seventeen uncertainty parameters of the ISAA program were meticulously screened. Using Wilks' formula, the developed uncertainty program code, SAUP, was employed to carry out Latin hypercube sampling (LHS), while ISAA was employed to execute batch calculations. Statistical analysis was then conducted on two figures of merit (FOMs), namely, hydrogen generation and the release of fission products (FP) within the pressure vessel. Uncertainty calculations revealed that hydrogen production and the fraction of fission product released exhibited a normal distribution, ranging from 182.784 kg to 329.581 kg and from 15.6% to 84.3%, respectively. The ratio of hydrogen production to reactor thermal power fell within the range of 0.0578 to 0.104. A sensitivity analysis was performed for uncertain input parameters, revealing significant correlations between the failure temperature of the cladding oxide layer, maximum melt flow rate, size of the particulate debris, and porosity of the debris with both hydrogen generation and the release of fission products.
Subjects: Dynamic and Electric Engineering >> Electrical Engineering submitted time 2023-11-29
Abstract： With the development of renewable energy, the voltage support strength of renewable energy multi-infeed systems is gradually decreasing, and there is an urgent need for strength evaluation methods. If considering that converters are all at the rated operating conditions, accurate quantification of strength can be achieved by utilizing existing power grid strength indices and threshold; However, the actual operating conditions are diverse and complex, which disrupts the existing criteria for defining indices and leads to the failure of existing methods. Therefore, this paper focuses on the quantification of voltage support strength under actual operating conditions. Firstly, the mapping relationship between the dynamic characteristics of grid-following converters, operating conditions, and parameters is discovered. Secondly, based on the perturbation theory of characteristics subspaces, an equivalent single-infeed system that can approximate the stability of the actual system is solved. On this basis, the operational generalized short circuit ratio(OgSCR) are defined. A rigorous method for quantifying voltage support strength can be formed based on the OgSCR and the device critical operational short-circuit ratio (OSCR0). In addition, this paper reveals the effect of actual operating conditions on strength. Finally, a numerical example is used to verify the feasibility of the proposed method
Peer Review Status:Awaiting Review
Subjects: Psychology >> Developmental Psychology submitted time 2023-11-29
Abstract： Preschool-aged children are situated within a crucial phase for the enhancement of their inhibitory control capabilities. Recent investigations have unveiled that the inhibitory control of preschoolers is not a simplistic, unidimensional construct. Rather, it progressively divides into “hot” inhibition and “cold” inhibition, with these facets maturing as children grow older. Remarkably, all two aspects bear substantial significance for the advancement of children's higher cognitive capacities and emotional regulation proficiencies. Prior inquiries have indicated that a solitary 24-hour movement behavior, such as physical activity, sedentary conduct, or sleep, possesses the potential to influence the inhibitory control abilities of preschool children. Nonetheless, some scholars have critiqued the flawed approach of examining the impact of isolated movement behaviors on cognitive development. Consequently, new research endeavors should adopt a comprehensive perspective, investigating the collective influence of these three behaviors in order to comprehensively analyze their effects on the psychological development of preschool children.
Therefore, this study combined questionnaire measurement and behavioral experiments, and used the Isotemporal substitution model of compositional data to explore the association between 24-hour Movement behavior and “cold” and “hot” inhibition control in preschool children. Based on inclusion/exclusion criteria and their parents’ answers to a self-reported questionnaire, 66 preschoolers (3-6 years) were investigated in this study. Relevant questionnaires were used to measure 24-hour movement behavior, and Fish flanker and Emotional flanker paradigms were used to measure the “cold” and “hot” inhibitory control of preschoolers. The time of light physical activity (LPA), moderate-to-vigorous physical activity (MVPA) and sedentary behavior (SB) were calculated according to the range specified by the authors. Sleep duration (SLP) was measured using a self-compiled questionnaire consistent with previous studies; the correct rate indexes of Fish Flanker and Emotion Flanker tasks were automatically recorded by the computer.
The results showed that the temporal distribution of 24-hour movement behavior were statistically significant (p<0.001) with “cold” and “hot” inhibitory control of preschoolers. The isotemporal substitution results show the difference in prediction between “cold” and “hot” inhibitory control when 10 minutes of movement behavior is reassigned to other movement behaviors and the remaining movement behaviors remain unchanged. In terms of “cold” inhibitory control, isotemporal substitution analysis revealed that the correct rate of “cold” inhibitory control increased significantly after 10 minutes of SLP replaced SB or LPA, and this also happened after MVPA replaced SB or LPA. In terms of “hot” inhibitory control, when SB, LPA were reassigned for 10 minutes to SLP, the predicted “hot” inhibitory control of children was higher than the predicted average “hot” inhibitory control. Whereas the opposite allocation pattern (10 min reallocation from SLP to SB, LPA) predicted the opposite “hot” inhibitory control change, but these relationships were asymmetrical.
In conclusion, during the preschool stage, inhibitory control is influenced by 24-hour movement behaviors, and this influence varies depending on the different combinations of these behaviors. When comparing light physical activity (LPA) and moderate-to-vigorous physical activity (MVPA), substituting sedentary behavior (SB) with moderate-to-vigorous physical activity (MVPA) and sleep duration (SLP) yields the most notable enhancement in children's inhibitory control. This study explored the relationship between 24-hour movement behavior and “cold” and “hot” inhibitory control of preschool children, which can provide scientific basis for the cultivation of inhibitory control ability of preschool children and 24-hour exercise guidelines.
Peer Review Status:Awaiting Review
Subjects: Nuclear Science and Technology >> Particle Accelerator submitted time 2023-11-29
Abstract： The accelerator vacuum monitoring system is an important subsystem in the accelerator control system, which plays an important role in maintaining the normal operation of the accelerator. The design, development and development process of traditional large-scale control systems are highly dependent on physical entities, and the functional testing and performance verification of the whole system are all concentrated in the late stage of the project, resulting in a long development cycle of the control system, higher risks, and a tight time for late field debugging. To this end, industrial virtual debugging and virtual machine technologies were introduced to build a full-level virtual simulation debugging platform for the accelerator vacuum monitoring system. In the early stage of development, parallel collaborative development, full-level virtual debugging and logic rehearsal of the accelerator air monitoring system began to be carried out. Finally, the debugging results were applied to the site through on-site configuration, significantly shortening the time of on-site debugging. Reduce equipment loss and commissioning risk, improve project implementation efficiency and engineering design reliability.
Subjects: Nuclear Science and Technology >> Particle Accelerator Subjects: Electronics and Communication Technology >> Electron Technology submitted time 2023-11-29
Abstract： In light of the current international energy scarcity, nuclear power has emerged as a crucial source of clean energy. Proton accelerators have therefore become a pivotal technology in nuclear waste management. During beamline orbit correction processes, precise calculations of beamline orbit parameters are required. Given the demonstrated effectiveness of neural networks in a wide variety of industry domains, they offer promising potential for high-accuracy data fitting and prediction. Hence, this study proposes a novel direct linear accelerator beamline orbit parameter prediction technique based on edge intelligence computing nodes. This technique leverages BPNN to learn from historical data and generate a powerful model that can be seamlessly deployed to edge computing nodes, thereby accelerating the prediction of BPM location parameters. Furthermore, the proposed approach may be complemented by an adaptive compensation system in the future, which, in combination with edge computing nodes, could enable automatic beamline position correction, thereby achieving beamline orbit correction. Our experimental results demonstrate that FPGA, as an edge acceleration node, can achieve an inference speed of 2.5us, which represents a remarkable performance enhancement of approximately 165.6 times compared to CPU and approximately 7.9 times compared to GPU. The predicted results exhibit an average error of only 0.5%, and they exhibit the desired latency and accuracy characteristics.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-11-29 Cooperative journals: 《中国全科医学》
Abstract： Background Type 2 diabetes mellitus（T2DM） has become a public health burden facing the whole world，with the rapid development of Internet and digital technology，intelligent service model plays an important role in the management of patients with T2DM. Objective To explore the effectiveness of wearable devices combined with health coaching in patients with T2DM. Methods A total of 315 patients with T2DM who were hospitalized in the Second Affiliated Hospital of Nanchang University from June 2020 to June 2021 were selected as the study subjects，and divided into the control group， the intervention A group and the intervention B group based on the method of randomized numerical table，the control group implemented the routine management measures based on capillary blood glucose monitoring，the intervention A group adopted the wearable devices for routine management，the intervention B group was managed by wearable devices combined with health coaching. The differences in glycemic and lipid control status and self-management behaviors among the three groups before and 3，6，9 and 12 months after intervention were compared. Results A total of 15 lost visits were made during the implementation of the study，and 300 study subjects were finally included in the analysis，with 100 in each of the three groups. There was an interaction between intervention method and time in the three groups on 2-hour postprandial blood glucose（2 hPG），glycated hemoglobin （HbA1c），number of hypoglycemic episodes，low-density lipoprotein cholesterol （LDL-C），self-management behaviors of diabetes mellitus （2-DSCS），and self-management behaviors of diabetic patients （SDSCA） scores（P<0.05）. There was a significant main effect of intervention method on the number of hypoglycemic episodes，total cholesterol（TC）， high-density lipoprotein cholesterol（HDL-C），2-DSCS and DSCS scores（P<0.05）. The main effect of time was significant on all indicators except the number of hypoglycemic episodes（P<0.05）. The levels of HbA1c，FBG，2 hPG，TC at 3，6， 9，and 12 months after the intervention in each group were lower than those before the intervention in the same group，and the level of 2-DSCS and DSCS scores of T2DM patients were higher than those before the intervention in the same group. After 3 months of intervention， the number of hypoglycemic episodes were lower in the intervention B group than in the intervention A group and control group（P<0.05）；after 6 months of intervention，the 2hPG level and the TC level in the intervention B group were lower than those in the control group （P<0.05），HDL-C level，2-DSCS score，SDSCA score in the intervention A and intervention B groups were higher than the control group（P<0.05），SDSCA score in the intervention B group was higher than the intervention A group（P<0.05）；after 9 months of intervention，FBG level，2hPG level，and TC level in the intervention B group were lower than those in the control group（P<0.05），FBG level and 2hPG level in intervention B group were lower than those in intervention A group，HDL-C level，2-DSCS score，and SDSCA score in the intervention B group were higher than those in the control group（P<0.05），2-DSCS score and SDSCA score in the intervention B group were higher than those of the intervention A group（P<0.05）；after 12 months of intervention，FBG level，2hPG level，HbA1c level，TC level，LDL-C level in the intervention B group were lower than those in the control group（P<0.05），FBG level，2hPG level，HbA1c level in the intervention B group were lower than those in the intervention A group，HDL-C level，2-DSCS score，and SDSCA score in the intervention B group were higher than those in the control and intervention groups（P<0.05）. Conclusion Wearable devices combined with health coaching has short-term and long-term effects in improving the comprehensive control of glucose and lipids，as well as improving self-management ability of them in patients with T2DM.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-11-29 Cooperative journals: 《中国全科医学》
Abstract： Background General practice has significant interdisciplinary characteristics，both qualitative research and mixed-methods research are applicable to scientific research in this field. In recent years，there has been a steady increase in the number of relevant academic papers published in China，but the overall quality of the literature has not been systematically assessed. Objective To explore the methodological quality of qualitative and mixed methods research literature published in the field of general practice and primary care. Methods From August 2022 to April 2023，four investigators analyzed and assessed the methodological quality of qualitative and mixed methods studies published in the field of general practice and primary care in China in 2021 using the qualitative assessment tools of Critical Appraisal Skills Programme（CASP） and Mixed Methods Appraisal Tool（MMAT），respectively. The researchers were grouped in pairs and independently for information extraction and quality evaluation. Results A total of 35 qualitative research papers and 9 mixed methods research papers were included. Among the qualitative studies，23 literature（65.71%）did not sufficiently considered ethical issues；recruitment of participants was not discussed in 94.29%（33/35）of the studies；the relationship between the researcher and the participants was not adequately considered in 82.86% of the studies；42.86%（15/35）of the studies had a sample size of <20 participants and data saturation was not discussed in 25.71%（9/35）of the studies. Major problems with mixed-methods studies included the fact that：88.89% of the studies（8/9）did not explicitly report the type of mixed methods research design and 88.89% of the studies（8/9）failed to effectively integrate the different components of the study to answer the research question. Conclusion The methodological quality of such studies in general practice and primary care published in recent years in China is still partially limited，especially in the ethics，reliability and information saturation among qualitative studies，and the integration among mixed methods researches，which should be further strengthened by training in research methodology and strict adherence to research design and reporting statements in order to improve the quality of research and even evidence for decision making.
Subjects: Medicine, Pharmacy >> Clinical Medicine submitted time 2023-11-29 Cooperative journals: 《中国全科医学》
Abstract： Background Dental caries is one of the common noncommunicable diseases worldwide，affecting more than one-third of the global population. The analysis of the current situation and trends in the disease burden of dental caries may provide reference for the prevention and control strategies of dental caries. Objective To analyze the current situation and trends in the incidence，prevalence and years lived with disability（YLD） of dental caries in China and provide reference for the development of the prevention and control of dental caries. Methods Data on the incidence，prevalence and YLD of caries of deciduous teeth and permanent teeth between 1990 and 2019 in China were extracted from the 2019 Global Burden of Disease（GBD） study. The percentage change in the counts of incident cases，prevalent cases and YLD of caries of deciduous teeth and permanent teeth from 1990 to 2019 was calculated，and Joinpoint regression model was used to analyze the annual percentage change（APC） and average APC（AAPC） in age-standardized rates of incidence，prevalence and YLD between 1990 and 2019 in China. Results Compared with 1990，the counts of incident cases，prevalent cases and YLD of caries of deciduous teeth in China in 2019 decreased by 25.69%，28.74% and 28.63%，respectively； the counts of incident cases，prevalent cases and YLD of caries of permanent teeth in China in 2019 increased by 17.41%，15.84% and 15.07%，respectively. In all age groups in 2019，the highest incidence rate（118.96%） of caries of deciduous teeth was observed in children aged 5 to 9 years，as well as the highest prevalence rate（53.08%） and YLD rate（20.40/100，000） of caries of deciduous teeth in children aged 1 to 4 years. The highest incidence rate（62.30%），prevalence rate（32.19%），and YLD rate（32.41/100 000） of caries of permanent teeth were observed in adults aged 20 to 24 years in 2019. Joinpoint regression analysis showed that the age#2;standardized rates of incidence（AAPC=0.21%95%CI=0.19% to 0.22%），prevalence（AAPC=0.03%，95%CI=0.01% to 0.05%） and YLD（AAPC=0.03%，95%CI=0.01% to 0.05%） of caries of deciduous teeth showed an overall upward trend in China between 1990 and 2019，and the age-standardized rates of incidence（AAPC=-0.05% to 95%CI=-0.05% to -0.04%），prevalence（AAPC=-0.23%，95%CI=-0.32% to -0.14%） and YLD（AAPC=-0.22%，95%CI=-0.31% to -0.13%） of caries of permanent teeth showed a downward trend in China between 1990 and 2019. Conclusion From 1990 to 2019，the burdens in caries of deciduous teeth in China showed an increasing trend，while the burdens in caries of permanent teeth caries showed a decreasing trend but remained serious in China. Caries prevention should not only be limited to children，but should include people of all age groups.
Subjects: Nursing >> Nursing submitted time 2023-11-28
Abstract： Objective To investigate the effect of umbilical moxibustion combined with lumbar and back muscle function exercise on the pain of patients with cold-dampness blocking lumbar disc herniation and its influence on pain factors.Method A total of 122 patients with cold-dampness-blocking lumbar disc herniation admitted to the First Affiliated Hospital of Hunan University of Chinese Medicine from October 2021 to October 2023 were selected and divided into conventional group and experimental group by random number table method, with 61 cases in each group. The conventional group was given lumbar and back muscle function exercise intervention, and the experimental group was given umbilical moxibustion intervention. The pain degree, lumbar function, daily life, pain factors and serum inflammatory factors were compared between the two groups before and after intervention.Results After 3, 7 and 15 days of intervention, the VAS score of the two groups was lower than that before intervention (P < 0.05), and the test group was lower than the conventional group (P<0.05). After 15 days of intervention, the ODI scores of the two groups were compared with those of SP, NPY, 5-HT, PGE2, BK. The levels of COX-2, TGF-β1, IL-1β and TNF-α were decreased compared with those before intervention (P < 0.05). And the test group was lower than the conventional group (P<0.05). The scores of the JOA and BI in both groups were higher than those before intervention (P<0.05). The experimental group was higher than the conventional group (P<0.05).Conclusion The application of umbilical moxibustion combined with lumbar and back muscle functional exercise in the treatment of patients with cold-dampness blocking lumbar disc herniation can significantly improve the pain degree, lumbar function and daily life, and reduce the levels of pain factors and serum inflammatory factors.
Peer Review Status:Awaiting Review
Subjects: Psychology >> Psychological Measurement Subjects: Psychology >> Statistics in Psychology submitted time 2023-11-28
Abstract： With the widespread use of intensive longitudinal studies in psychology and other social sciences, reliability estimation of tests in intensive longitudinal studies has received increasing attention. Earlier reliability estimation methods drawn from cross-sectional studies or based on generalizability theory have many limitations and are not applicable to intensive longitudinal studies. Considering the two main characteristics of intensive longitudinal data, multilevel structure and dynamic nature, the reliability of tests in intensive longitudinal studies can be estimated based on multilevel confirmatory factor analysis, dynamic factor analysis, and dynamic structural equation models. The main features and applicable contexts of these three reliability estimation methods are demonstrated with empirical data. Future research could explore the reliability estimation methods based on other models, and should also pay more attention to the testing and reporting of test reliability in intensive longitudinal studies.
Subjects: Psychology >> Social Psychology submitted time 2023-11-27
Abstract： The eye effect refers to the significant changes in people’s behavior when presented with direct eye cues. Previous research has found that eye cues have several positive effects, such as increasing people’s prosocial behavior, reducing antisocial behavior, and increasing self-awareness. However, these effects are often unstable. Factors that lead to the instability of the eye effect include physiological characteristics of the eyes, emotional type, presentation time, direction of gaze, form of task interaction, number of people around, noise in the vicinity, individual self-awareness, group identity, and behavioral costs. The principles behind it can be summarized as reputation mechanism and rule mechanism. Explaining the reasons for the instability of the eye effect based on the influencing factors and psychological mechanisms perspectives can provide theoretical insights into its ability to produce stable benefits. Future research could further refine the types of eye cues to expand the scope of the study, incorporate cognitive neuroscience techniques to explore the neural mechanisms involved, conduct longitudinal comparisons at different developmental stages of individuals, and conduct field studies to improve the ecological validity of the research in this area.The eye effect refers to the significant changes in people’s behavior when presented with direct eye cues. Previous research has found that eye cues have several positive effects, such as increasing people’s prosocial behavior, reducing antisocial behavior, and increasing self-awareness. However, these effects are often unstable. Factors that lead to the instability of the eye effect include physiological characteristics of the eyes, emotional type, presentation time, direction of gaze, form of task interaction, number of people around, noise in the vicinity, individual self-awareness, group identity, and behavioral costs. The principles behind it can be summarized as reputation mechanism and rule mechanism. Explaining the reasons for the instability of the eye effect based on the influencing factors and psychological mechanisms perspectives can provide theoretical insights into its ability to produce stable benefits. Future research could further refine the types of eye cues to expand the scope of the study, incorporate cognitive neuroscience techniques to explore the neural mechanisms involved, conduct longitudinal comparisons at different developmental stages of individuals, and conduct field studies to improve the ecological validity of the research in this area.
Subjects: Astronomy >> Astrophysical processes submitted time 2023-11-27 Cooperative journals: 《天文研究与技术》
Abstract： We find that the optical band light curve of the blazar PKS 0422 + 004 observed by the Transiting Exoplanet Survey Satellite (TESS) has a quasiperiodic oscillation (QPO) of about 7.4 days in sector 32. We use the Lomb-Scargle Periodogram (LSP) method to search for significant periods, and further validate them using the Weighted Wavelet Z-transform (WWZ) method for time-frequency domain analysis. Finally, based on Schwarzschild black hole (a=0) and extreme Kerr black hole (a=0. 998 2) models, we estimate the mass of the central black hole of this blazar. We obtain black hole masses of 1. 11 × 109 M☉ (Schwarzschild black hole) and 7.07 × 109M☉ (extreme Kerr black hole) with a main period of 7.4 days.
Subjects: Psychology >> Social Psychology submitted time 2023-11-26
Abstract： During the COVID-19 pandemic, all age groups’ mental health has substantially declined. Compared to other age groups, the impact of the COVID-19 pandemic on adolescent mental health problems was more salient, particularly on depression and anxiety. Previous studies, which were primarily conducted during the phase of COVID-19 pandemic, have mainly covered the first and second phases of COVID-19-related prevention and containment in China, without adequate attention being paid to the third and fourth phases of COVID-19-related prevention and containment in China. The present study thus investigated the developmental trajectories of depression and anxiety among adolescents, as well as the potential antecedent (psychological resilience) and outcome (prosocial tendency) of such trajectories in the late phase of the COVID-19 pandemic in China. In this study, 1170 adolescents in Shandong province were assessed at three time points with a six-month interval (Time 1=May 2021; Time 2=November 2021; Time 3=May 2022) from the normalization period of the pandemic through self-report questionnaires. The adolescents completed Center for Epidemiologic Studies Depression Scale and Self-Rating Anxiety Scale during the three measurements. Furthermore, all adolescents completed the Connor‐Davidson Resilience Scale at Time 1 and Prosocial Tendencies Measure at Time 3. According to the results of the latent growth curve models, adolescents’ depression and anxiety levels tended to decline. The higher the level of depression and anxiety at Time 1, the slower the decline over time. Furthermore, psychological resilience at Time 1 negatively predicted initial levels of depression and anxiety but positively predicted the decreasing speed of depression and anxiety trajectories. Concerning the outcomes, we found that the initial level and speed of depression trajectories significantly and negatively predicted the levels of prosocial tendency at Time 3. Regarding the anxiety trajectory, its intercept factor negatively predicted prosocial tendency at Time 3, but its slope factor’s predictive effect was non-significant. Finally, multi-group analyses revealed that both boys and girls showed declining trends in depression and anxiety over time, while girls scored significantly higher on depression and anxiety initially than boys. In conclusion, this research found that the changes in mental health (particularly depression and anxiety problems) among Chinese adolescents in the late phase of the COVID-19 pandemic were developing well, which provides empirical evidence for better construction of adolescent mental health service systems in China.
Subjects: Physics >> Nuclear Physics submitted time 2023-11-25
Yijie Wang
Fenhai Guan
Qianghua Wu
Xinyue Diao
Yan Huang
Liming Lyu
Yuhao Qin
Zhi Qin
Dawei Si
Zhen Bai
Fangfang Duan
Limin Duan
Zhihao Gao
Qiang Hu
Rongjiang Hu
Genming Jin
Shuya Jin
Junbing Ma
Peng Ma
Jiansong Wang
Abstract： The intensity interferometry is applied as a chronometer of the particle emission of hydrogen isotopes from the intermediate velocity source formed in $^{40}$Ar+$^{197}$Au reactions at 30 MeV/u. The dynamic emission order of $ tau_{ rm p}> tau_{ rm d}> tau_{ rm t}$ is evidenced via the correlation functions of nonidentical particle pairs. Assuming the similar source size, the same emission order is inferred from the correlation functions of identical particle pairs, where $ tau_{ rm p} approx 100 { rm ~fm/c}$ is extracted by the fit of Koonin-Pratt equation to p-p correlation function. Transport model simulations demonstrate that the dynamic emission order of light charged particles depends on the stiffness of the nuclear symmetry energy.
Peer Review Status:Awaiting Review
Subjects: Physics >> Nuclear Physics submitted time 2023-11-25
Fen-Hai Guan
Xin-Yue Diao
Qiang-Hua Wu
Xiang-Lun Wei
He-Run Yang
Peng Ma
Zhi Qin
Yu-Hao Qin
Dong Guo
Rong-Jiang Hu
Li-Min Duan
Zhi-Gang Xiao
Yi-Jie Wang
Abstract： The Compact Spectrometer for Heavy Ion Experiment (CSHINE) is under construction for the study of isospin chronology via the Hanbury Brown$-$Twiss (HBT) particle correlation function and the nuclear equation of state of asymmetrical nuclear matter. The CSHINE consists of silicon strip detector (SSD) telescopes and large-area parallel plate avalanche counters, which measure the light charged particles and fission fragments, respectively. In phase I, two SSD telescopes were used to observe 30 MeV/u $^{40}$Ar +$^{197}$Au reactions. The results presented here demonstrate that hydrogen and helium were observed with high isotopic resolution, and the HBT correlation functions of light charged particles could be constructed from the obtained data.
Peer Review Status:Awaiting Review
Subjects: Physics >> Nuclear Physics submitted time 2023-11-25
Abstract： We have developed a LaBr3(Ce) detector based on a customized 𝜙2″ ×2″ LaBr3(Ce) crystal coupled with the Hamamatsu R13089 photomultiplier. We determined the energy resolution and intrinsic detection efficiency of our detector to be 3.6% and 17.6% for the 662 keV 𝛾-ray, respectively. The time resolution of our detector was found to be 270 (22) ps using the cascade 1173-1332 keV 𝛾-rays from 60Co source. Furthermore, we evaluated the average activity of intrinsic radiation from our detector to be 4824 (69) Counts/h/cm3. The performance of the Saint-Gobain B380 and B390 detectors are also presented in this paper for reference.
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