Geomagnetic substorms release plasma and energy from the magnetotail to the inner magnetosphere and high latitude ionosphere.In this study,we investigate substorms of different time duration,observed during the years ...Geomagnetic substorms release plasma and energy from the magnetotail to the inner magnetosphere and high latitude ionosphere.In this study,we investigate substorms of different time duration,observed during the years 1982 to 2012.We measure substorm duration by a method based on the SME index.Our results demonstrate that longer-duration substorms occur more frequently during solar maximum years,and more frequently between the months of May and July,likely due to the higher polar ionospheric conductivity and more sunward geomagnetic pole directions during summer in the northern hemisphere.Additionally,longer substorms occur more frequently under stronger,longer-lasting southward IMF,and are accompanied by slower solar winds,suggesting that extended magnetic reconnection is required to drive longer substorms.Substorm durations are not significantly related to the minimum SML index,but longer substorms usually have higher SMU and continuously rising PC indices.The SME indices of long-duration substorms show a bimodal MLT distribution located near midnight and dusk after substorm onset,with the peak originally at midnight moving eastward to the morning side during the late recovery phase.Longer duration substorms have a stronger effect on the overall ring current at all MLT sectors except dawnside.Our results provide new insights into the development process and influencing factors of substorms,from the expansion phase to the recovery phase.展开更多
Objective:To explore the best duration of moxibustion on lumbar disk herniation(LDH).Methods:A total of 88 patients were randomly divided into control group and 15-min,30-min,and 45-min moxibustion groups.The control ...Objective:To explore the best duration of moxibustion on lumbar disk herniation(LDH).Methods:A total of 88 patients were randomly divided into control group and 15-min,30-min,and 45-min moxibustion groups.The control group was treated with conventional therapy,while the other 3 groups were intervened with different moxibustion durations.Low back pain,dysfunction,lumbar function,and effective rates were evaluated before,in the first week and second week of intervention.Results:In low back pain,compared with the control group,the score of the 15-min group had no significant difference,but it was significantly lower in the 30-min and 45-min groups.In dysfunction and lumbar function,compared with the control group,the scores of the 15-min,30-min,and 45-min groups were significantly higher,and the scores of the 30-min and 45-min groups were significantly higher,but there was no significant difference between the 30-min and 45-min group.In effective rates,there was no significant difference between the control group and 15-min group;the effective rates of the 30-min and 45-min groups were significantly higher than those of the control group.Conclusions:Moxibustion has good therapeutic effect on LDH with specific moxibustion time.展开更多
[Objective] The aim was to study on the effect of hosts on development and reproduction of mealybug （Phenacoccus solenopsis Tinsley）. [Method] Observation was conducted on developmental durations and fecundity of Ph...[Objective] The aim was to study on the effect of hosts on development and reproduction of mealybug （Phenacoccus solenopsis Tinsley）. [Method] Observation was conducted on developmental durations and fecundity of Phenacoccus solenopsis Tinsley fed on Gossypium spp., Nicotiana tabacum, Solanum tuberosum L and Hibiscus rosa-sinensis. [Result] There were differences among all durations, generation durations and fecundities of the mealybug adult females. Specifically, the generation durations on cotton （Gossypium spp.）, tobacco（ Nicotiana tabacum）, potato （Solanum tuberosum L） and Hibiscus rosa-sinensis were 30.2, 28.2, 37.3, and 27.7 d, and the fecundities per female were 626.0, 417.2, 552.5, and 183.2 ind., respectively. [Conclusion] The mealybug would have strong pontential in population growth when fed on cotton, tobacco and potato.展开更多
Acupuncture is regarded as an effective therapy for cerebral ischemia. Different acupuncture ma- nipulations and durations may result in different therapeutic effects. In the present study, the Neig uan （PC6） acupoi...Acupuncture is regarded as an effective therapy for cerebral ischemia. Different acupuncture ma- nipulations and durations may result in different therapeutic effects. In the present study, the Neig uan （PC6） acupoint of rats with occluded middle cerebral arteries was needled at a fixed frequency （3 Hz） with different durations, i.e., 5, 60 and 180 seconds under a twisting-rotating acupuncture method. Results showed that different durations of acupuncture had different therapeutic effects, with 60 seconds yielding a better therapeutic effect than the other two groups. This duration of treatment demonstrated rapid cerebral blood flow, encouraging recovery of neurological function, and small cerebral infarct volume. Experimental findings indicated that under 3 Hz frequency, the treatment of needling Neiguan for 60 seconds is effective for ischemic stroke.展开更多
Objective: This research aims to investigate the best "Te Ding Dian Ci Bo Pu Zhi Liao Qi"(TDP) irradiation duration to enhance the efficacy of nursing and patient satisfaction.Methods: A total of 34 eligible...Objective: This research aims to investigate the best "Te Ding Dian Ci Bo Pu Zhi Liao Qi"(TDP) irradiation duration to enhance the efficacy of nursing and patient satisfaction.Methods: A total of 34 eligible patients were randomly divided into the treatment group(n=18) and the control group(n=16) between December 2015 and December 2016. Qualitative and quantitative studies were combined to create an impersonal evaluation of incision pain score, time of stitches removal, duration of hospital stays, patient satisfaction, and subjective experience due to different TDP irradiation durations.Results: The incision pain scores of the treatment group were 3.06±0.899 and 1.35±0.493 before and after treatment, respectively(P< 0.05), whereas those of the control group were 2.46±1.127 and 1.0±0.707 before and after treatment, respectively(P<0.05).No significant difference was found between the treatment group and the control groupup(P>0.05). The time of stitches removal and the duration of hospital stays of the treatment group were 14.85±4.070 and 19.08±6.652, respectively, whereas those of the control group were 14.08±0.641 and 23.15±10.72(P>0.05), respectively. The patient satisfaction degree score of the treatment group was2.77±0.439, whereas that of the control group was 2.08±0.954(P< 0.05).Conclusions: TDP irradiation can effectively relieve the incision pain of patients after lumbar spinal surgery. The treatment group is superior to the control group in patient satisfaction.展开更多
The purpose of this study was to examine the relationship between daily activities and sleep durations for patients following elective percutaneous coronary intervention (ePCI) and diagnosed with ischemic heart diseas...The purpose of this study was to examine the relationship between daily activities and sleep durations for patients following elective percutaneous coronary intervention (ePCI) and diagnosed with ischemic heart disease (IHD) after discharge to their homes. The actigraph data were used to collect data from twenty five patients. The duration of night-time sleep (minutes from the start to end of night-time) and actual night-time sleep duration (total sleep duration excluding wake-up durations of night-time) on the seventh day after discharge were divided into three groups;less than 360, 360 to 480, and more than 480 minutes (short, optimal and long respectively). Subsequently, among the three groups of patients, the data were analyzed by Kruskal Wallis H-test with multiple comparison procedures using the Scheffé-test in order to compare differences in daytime activity items at seven days after discharge from the hospital. Total daytime nap duration (p p p p < 0.05). However, the duration of night-time sleep and daytime activity did not significantly differ. If actual night-time sleep duration is improved from 360 to 480 minutes, daytime nap could potentially be decreased. Determining objective sleep conditions for patients and treating sleep disorders may improve overall patient health, facilitating appropriate sleep and wake rhythms.展开更多
To clarify the contribution of oxygen vacancies to room-temperature ferromagnetism(RTFM)in cobalt doped TiO_(2)(Co-TiO_(2)),and in order to obtain the high level of magnetization suitable for spintronic devices,in thi...To clarify the contribution of oxygen vacancies to room-temperature ferromagnetism(RTFM)in cobalt doped TiO_(2)(Co-TiO_(2)),and in order to obtain the high level of magnetization suitable for spintronic devices,in this work,Co-TiO_(2) nano-particles are prepared via the sol-gel route,followed by vacuum annealing for different durations,and the influence of vacu-um annealing duration on the structure and room-temperature magnetism of the compounds is examined.The results reveal that with an increase in annealing duration,the concentration of oxygen vacancies rises steadily,while the saturation magnetiza-tion(Ms)shows an initial gradual increase,followed by a sharp decline,and even disappearance.The maximum Ms is as high as 1.19 emu/g,which is promising with respect to the development of spintronic devices.Further analysis reveals that oxygen va-cancies,modulated by annealing duration,play a critical role in tuning room-temperature magnetism.An appropriate concentra-tion of oxygen vacancies is beneficial in terms of promoting RTFM in Co-TiO_(2).However,excessive oxygen vacancies will result in a negative impact on RTFM,due to antiferromagnetic superexchange interactions originating from nearest-neighbor Co^(2+)ions.展开更多
Objective:To provide information on clinical characteristics and different durations of COVID-19 and to identify the potential risk factors for longer hospitalization of patients with COVID-19.Methods:In this retrospe...Objective:To provide information on clinical characteristics and different durations of COVID-19 and to identify the potential risk factors for longer hospitalization of patients with COVID-19.Methods:In this retrospective study,we enrolled 77 patients(age 52±20 years;44.2%males)with laboratory-confi rmed COVID-19 admitted to Beijing YouAn Hospital between January 21 and February 8,2020.Epidemiological,clinical,and radiological data on admission were collected;complications and outcomes were followed up until February 26,2020.The end point of the study was discharge alive within 2 weeks.Cox proportional-hazards regression was performed to identify risk factors for longer hospitalization.Results:Of 77 patients,there were 34 males(44.2%),24(31.2%)with comorbidities,22(28.6%)with lymphopenia,20(26.0%)with severe COVID-19,and 28(36.4%)with complications.By the end of follow-up,64 patients(83.1%)were discharged home,eight remained in hospital,and fi ve had died.Thirty-six patients(46.8%)were discharged within 14 days and thus reached the study end point,including 34 of the 57 patients with nonsevere COVID-19(59.6%)and two of the 20 patients with severe COVID-19(10%).The overall cumulative probability of the end point was 48.3%.Hospital length of stay and the duration from exposure to discharge for the 64 discharged patients were 13(10-16.5)days and 23(18-24.5)days,respectively.A multivariable stepwise Cox regression model showed that bilateral pneumonia on CT scan,shorter time from illness onset to admission,severity of disease,and lymphopenia were independently associated with longer hospitalization.Conclusions:COVID-19 has a shorter duration of disease and hospital length of stay than severe acute respiratory syndrome.Bilateral pneumonia on CT scan,shorter period from illness onset to admission,lymphopenia,and severity of disease are the risk factors for longer hospitalization of patients with COVID-19.展开更多
Based on propagation-rate equations, the influence of different input pulse durations on the properties of Er^3＋/Yb^3＋ co-doped double-clad fiber amplifier at dynamic equilibrium was analyzed. The change characteris...Based on propagation-rate equations, the influence of different input pulse durations on the properties of Er^3＋/Yb^3＋ co-doped double-clad fiber amplifier at dynamic equilibrium was analyzed. The change characteristic of output power sag with pulse duration and repetition rate was shown. Whether single or multichannel input pulses are amplified, the shorter the input pulse duration is, the smaller the power sags of output pulse will be. At low repetition rate, upper gain values（Gupper） of gain swing are almost the same for different input pulse durations, which tend to the small signal gain, but lower gain value（Glower） of short input pulse is larger than that of long input pulse. At highrepetition rate, lower gain value（Glower） approaches to upper gain value（Glower）.展开更多
Based on the well-known modified Angstrom formula on the relationship between the sunshine duration and the global solar radiation, this paper aimed to estimate the value of the constant a and b in Cameroon. Only five...Based on the well-known modified Angstrom formula on the relationship between the sunshine duration and the global solar radiation, this paper aimed to estimate the value of the constant a and b in Cameroon. Only five cities (Maroua, Garoua, NGaoundéré, Yaoundé and Douala) had the both available in-situ data recorded during the period of eleven years (1996-2006) beside which four others cities (Dschang, Koundja, Yoko and Manfé) had only the in-situ sunshine duration available data recorded during the period of twenty years (1986-2006). The 9 cities were grouped in 3 different climate regions. Based on the data of the 5 first cities belonging the 3 regions, the follow constant values a1 = -0.05, a2 = -0.02, a3 = -0.14 and b1 = 0.94, b2 = 0.74, b3 = 1.12 were obtained. The Root Mean Square Error (RMSE) Mean Bias Error (MBE) and correlation coefficient (r) were also determined. Then we used these values to estimate the global solar radiation for the other four remain cities. The constants a and b obtained values are in accordance with those of the West Africa region which Cameroon belongs to. So they can be employed in estimating global solar radiation of location in Cameroon paying attention only to the geographical location information.展开更多
Acoustic analysis and synthesis experiments have shown that duration and intonation patterns are the two most important prosodic features responsible for the quality of synthesized speech. In this paper a set of featu...Acoustic analysis and synthesis experiments have shown that duration and intonation patterns are the two most important prosodic features responsible for the quality of synthesized speech. In this paper a set of features are proposed which will influence the duration patterns of the sequence of the sound units. These features are derived from the results of the duration analysis. Duration analysis provides a rough estimate of features, which affect the duration patterns of the sequence of the sound units. But, the prediction of durations from these features using either linear models or with a fixed rulebase is not accurate. From the analysis it is observed that there exists a gross trend in durations of syllables with respect to syllable position in the phrase, syllable position in the word, word position in the phrase, syllable identity and the context of the syllable (preceding and the following syllables). These features can be further used to predict the durations of the syllables more accurately by exploring various nonlinear models. For analying the durations of sound units, broadcast news data in Telugu is used as the speech corpus. The prediction accuracy of the duration models developed using rulebases and neural networks is evaluated using the objective measures such as percentage of syllables predicted within the specified deviation, average prediction error (μ), standard deviation (σ) and correlation coefficient (γ).展开更多
Objective To investigate the effects of Dapagliflozin combined with insulin treatment on blood glucose index and pancreaticβ-cell function in overweight/obese type 2 diabetes mellitus(T2DM)patients with different dis...Objective To investigate the effects of Dapagliflozin combined with insulin treatment on blood glucose index and pancreaticβ-cell function in overweight/obese type 2 diabetes mellitus(T2DM)patients with different disease durations.Methods A total of 288 patients with impaired pancreatic function who were treated from June 2019 to June 2020 were selected.They were divided into three groups,short duration group(≤10 years group,n=95),medium duration group(10-20 years group,n=96)and long duration group(≥20 years group,n=97).Three groups of patients were treated with Dapagliflozin in addition to the regular insulin therapy for 6 months.Clinical efficacy,blood glucose indices,pancreaticβ-cell function and complications during the treatment period were compared among the three groups.Results After treatment,there was a significant decrease in the values of three groups including WC,FPG,2 hPG,HbA,c,TC,TG,LDL-C,BMI,FIns and HOMA-IR(P<O.05).Meanwhile,HDL-C,C-P,HOMA-βand HOMA-IS values showed a significant increase(P<0.05).After treatment,WC,FPG,2 hPG,HbA,c,TC,TG,LDL-C,FIns and HOMA-IR increased in turn(P<O.05),while HDL-C,C-P,HOMA-βand HOMA-IS decreased in turn in≤1O years group,10-20 years group,≥20 years group(P<0.05).The BMI of 10-20 years group was lower than that of≤10 years group and≥20 years group(P<0.05),while the BMI of≥20 years group was higher than that of≤10 years group(P<0.05).Conclusion In overweight/obese T2DM patients with different DM durations,Dapagliflozin combined with insulin treatment shows a significant advantage in lowering blood glucose indices and improving pancreaticβ-cell function,especially for patients with a shorter disease duration.展开更多
Objective This study aimed to investigate the impact of glycemic control and diabetes duration on subsequent myocardial infarction(MI)in patients with both coronary heart disease(CHD)and type 2 diabetes(T2D).Methods W...Objective This study aimed to investigate the impact of glycemic control and diabetes duration on subsequent myocardial infarction(MI)in patients with both coronary heart disease(CHD)and type 2 diabetes(T2D).Methods We conducted a retrospective cohort study of 33,238 patients with both CHD and T2D in Shenzhen,China.Patients were categorized into 6 groups based on baseline fasting plasma glucose(FPG)levels and diabetes duration(from the date of diabetes diagnosis to the baseline date)to examine their combined effects on subsequent MI.Cox proportional hazards regression models were used,with further stratification by age,sex,and comorbidities to assess potential interactions.Results Over a median follow-up of 2.4 years,2,110 patients experienced MI.Compared to those with optimal glycemic control(FPG<6.1 mmol/L)and shorter diabetes duration(<10 years),the fullyadjusted hazard ratio(HR)(95%Confidence Interval[95%CI])for those with a diabetes duration of≥10 years and FPG>8.0 mmol/L was 1.93(95%CI:1.59,2.36).The combined effects of FPG and diabetes duration on MI were largely similar across different age,sex,and comorbidity groups,although the excess risk of MI associated with long-term diabetes appeared to be more pronounced among those with atrial fibrillation.Conclusion Our study indicates that glycemic control and diabetes duration significant influence the subsequent occurrence of MI in patients with both CHD and T2D.Tailored management strategies emphasizing strict glycemic control may be particularly beneficial for patients with longer diabetes duration and atrial fibrillation.展开更多
The relations of intensity Just Noticeable Difference (JND) to intensity for tone bursts maybe,depend on signal durations according to Jont B.Allen's [J. Acoust. Soc. Am. 102 3, 1997, 3628--3646.]. The intensity j...The relations of intensity Just Noticeable Difference (JND) to intensity for tone bursts maybe,depend on signal durations according to Jont B.Allen's [J. Acoust. Soc. Am. 102 3, 1997, 3628--3646.]. The intensity just noticeable differences for tone bursts with durations of 1 ms, 10 ms, 100 ms, 1000 ms, 5000 ms and 10000 ms were measured at different intensity levels of 20 dB, 30 dB, 40 dB, 50 dB, 60 dB, 70 dB, 80 dB, 90 dB, 100 dB. The data show that variance of Weber fraction (△I/I) with intensity is distinct from Riesz's result and SPIN theory, and that the relations between Weber fraction and intensity for signals of different durations are similar in spite of Weber fraction decreasing to asymptote with signal duration increasing. This means the difference of pulse measurement of intensity JND from Riesz's result and SPIN theory does not arise from the limited signal duration of pulse method and provides new cue for hearing research.展开更多
BACKGROUND Decreased renal function is a well-known risk factor for cardiovascular diseases(CVD)and death.However,the impact of diabetes duration and the glomerular filtration rate(GFR)on cardiovascular complications ...BACKGROUND Decreased renal function is a well-known risk factor for cardiovascular diseases(CVD)and death.However,the impact of diabetes duration and the glomerular filtration rate(GFR)on cardiovascular complications in patients with type 2 dia-betes has not been well studied.AIM To investigate the complex impact of longer diabetes duration and GFR on CVD and mortality.METHODS Subjects with diabetes age≥20 years,who underwent health check-ups from 2015 to 2016 were identified in the Korean National Health Insurance Service database.Based on diabetes duration,subjects were grouped into new-onset,<5 years,5–9 years,or≥10 years.The new-onset diabetes group[estimated GFR(eGFR):≥90 mL/min/1.73 m2]was the reference group.A Cox proportional hazards model adjusted for potential confounders was used to estimate the risk for myocardial infarction(MI),ischemic stroke(IS),and mortality.RESULTS During a 3.9-year follow-up of 2105228 patients,36003(1.7%)MIs,46496(2.2%)ISs,and 73549(3.5%)deaths were documented.Both longer diabetes duration and lower eGFR were independently associated with higher risks of MI,IS,and mortality,which were further amplified when these factors coexisted.Even patients with new-onset diabetes had elevated MI and IS risk at mildly reduced eGFR(60–90 mL/min/1.73 m^(2)).Mortality risk rose appreciably once eGFR declined below 60 mL/min/1.73 m^(2),particularly in those with longer diabetes duration.eGFR≥90 mL/min/1.73 m2 subgroups had higher death risk than eGFR 60–90 mL/min/1.73 m2 subgroups regardless of diabetic duration.CONCLUSION Increasing diabetes duration and decreasing eGFR are associated with increased risk of MI,IS,and mortality.For cardiovascular risk estimation,diabetes duration should be considered an important risk factor.展开更多
Sleep health literacy encompasses the knowledge, motivation, and skills required to promote healthy sleep and recognize sleep disorders. In Japan, sleep-related issues are a significant contributor to prolonged studen...Sleep health literacy encompasses the knowledge, motivation, and skills required to promote healthy sleep and recognize sleep disorders. In Japan, sleep-related issues are a significant contributor to prolonged student absenteeism, underscoring the urgent need to address these challenges within school health programs. This review explores the historical evolution of Japan’s perspectives on sleep, shedding light on misconceptions rooted in Neo-Confucianism (Shushigaku), such as the notion of “sacrificing sleep for achievement”. While the 2018 Work Style Reform Act has introduced measures to ensure workplace rest, similar initiatives for students remain absent, perpetuating a culture of sleep deprivation. Misunderstandings surrounding adolescent sleep patterns, chronotypes, and sleep-related health factors are addressed. The review concludes by proposing seven core principles for advancing sleep health literacy: 1) Exposure to morning light;2) Engagement in daytime physical activity;3) Resting in darkness at night;4) Consuming breakfast and avoiding late-night meals;5) Maintaining regular elimination;6) Minimizing stimulants and excessive media use;7) Respecting pre-sleep rituals. Enhancing sleep health literacy, particularly within educational settings, is vital for tackling adolescent sleep challenges and fostering long-term well-being. School health professionals must take the lead in driving this transformative initiative.展开更多
Climate warming has intensified the global hydrological cycle,amplifying the differences in precipitation and soil moisture between arid and humid areas.Such a change under regional drought may alter nitrogen(N)and ph...Climate warming has intensified the global hydrological cycle,amplifying the differences in precipitation and soil moisture between arid and humid areas.Such a change under regional drought may alter nitrogen(N)and phosphorus(P)releases during litter decomposition in terrestrial ecosystems,but how these biogeochemical processes respond to drought differently between arid and humid areas remains unclear.Here,we compiled 259 and 138 paired observations(with and without drought conditions)to assess the global variations in the drought effects on N and P releases during litter decomposition between arid(aridity index<0.5)and humid(aridity index>0.5)areas.Litter N release increased under drought in both arid(0.35%)and humid(3.62%)areas,and P release decreased by 7.32%in arid areas but increased by 2.22%in humid areas under drought.These changes in N and P releases from decomposing litter were positively correlated with drought duration in arid areas,dependent on microclimate,edaphic factors,and litter quality.Our findings highlight the contrasting effects of drought on litter N and P releases between arid and humid ecosystems,and this differential influence will greatly improve our capability to evaluate and forecast nutrient cycling during litter decomposition under different precipitation patterns.展开更多
BACKGROUND Exercise plays a key role in managing chronic conditions such as diabetes mellitus(DM),a major contributor to end-stage renal disease(ESRD),a serious public health issue.AIM To investigate the relationship ...BACKGROUND Exercise plays a key role in managing chronic conditions such as diabetes mellitus(DM),a major contributor to end-stage renal disease(ESRD),a serious public health issue.AIM To investigate the relationship between exercise intensity,DM duration,and ESRD incidence.METHODS This retrospective cohort study analyzed data from 2495031 individuals with DM who underwent the Korean National Health Screening between 2015 and 2016,with follow-up through 2022.The Cox proportional hazards model was adjusted for confounders,including age,sex,income,smoking,and baseline comorbidities.RESULTS Longer DM duration was associated with a significantly higher risk of ESRD,with durations≥10 years showing the highest risk[hazard ratio(HR):2.624,95%confidence interval(CI):2.486-2.770].Increased exercise intensity reduced the risk of developing ESRD across all diabetes duration groups,with the highest exercise category(≥1500 metabolic equivalents of task-min/week)demonstrating a protective effect compared to that of no exercise(HR:0.837,95%CI:0.791-0.886).Exercise benefits were more pronounced in patients without hypertension,non-smokers,and those with lower alcohol consumption.Additionally,ESRD risk reduction was significant among patients with a body mass index≥25 and those without proteinuria or chronic kidney disease.CONCLUSION Longer diabetes duration is associated with increased ESRD risk,while high-intensity exercise may mitigate this risk.These findings suggest promoting exercise is important for managing diabetes to reduce renal complications.展开更多
AIM:To investigate the occurrence of eye asthenopia in Chinese adults and pinpoint the factors contributing to it using a 17-item Asthenopia Survey Questionnaire(ASQ-17).METHODS:A total of 2509 Chinese adults aged 18 ...AIM:To investigate the occurrence of eye asthenopia in Chinese adults and pinpoint the factors contributing to it using a 17-item Asthenopia Survey Questionnaire(ASQ-17).METHODS:A total of 2509 Chinese adults aged 18 and above from 30 regions in China participated in a crosssectional online survey in February 2020.The survey utilized the ASQ-17,which had been proven reliable and validated for assessing asthenopia-related symptoms experienced in the past two weeks among the Chinese population.Data on demographics and living conditions,including age,gender,humidity,air quality in their residential areas,frequency of heightened anxiety or depression,daily duration of near vision activity,sleep duration,sleep quality,and history of eye surgery,were collected.Principal component analysis and multivariate logistic regression were employed to identify independent factors associated with asthenopia.RESULTS:Out of the 2502 participants,with an average age of 31±8y included in the analysis,asthenopia was prevalent in 35.2%of cases.Multivariate analysis revealed that the most influential risk factor was poor sleep and mental well-being,which encompassed shorter daily sleep duration,lower sleep quality,and more frequent feelings of heightened anxiety or depression[odds ratio(OR):2.07,95%confidence interval(CI):1.88–2.29,P<0.001].This was followed by each additional 2h of daily near vision activity relative to 4h(OR:1.33,95%CI:1.21–1.45,P<0.001),and lower humidity and worse air quality in the residential area(OR:1.10,95%CI:1.02–1.21,P=0.019).CONCLUSION:Asthenopia is a common issue among Chinese adults,and preventative measures should focus on improving sleep and mental well-being.Further research targeting physiological exposure,different age groups or longitudinal studies to establish causality are needed to explore the role of sleep and mental status as an influencing factor.展开更多
Avian incubation is characterised by the contact between the eggs and the bird's skin to transfer heat to increase egg temperature above ambient conditions. Birds can be attentive to the clutch all of the time or,...Avian incubation is characterised by the contact between the eggs and the bird's skin to transfer heat to increase egg temperature above ambient conditions. Birds can be attentive to the clutch all of the time or, particularly if only one parent incubates, attentiveness may be quite low. Attentiveness is related to egg size with large eggs having high attentiveness, whereas small eggs (<10 g) can have attentiveness ranging from 50% to 100%. Previous studies have suggested that incubation duration is a function of attentiveness albeit for small birds. This study tested the hypothesis that, after controlling for egg size and phylogeny, incubation duration would be a function of attentiveness. Data for 444 bird species representing 24 orders were analysed. Whilst egg mass had a significant relationship with incubation duration, there was no relationship with attentiveness for all of the species or a subset of the passerines. Despite egg temperature drops during an incubation recess, average day-time and night-time temperatures are similar in a range of species. Re-examination of previously reported temperature profiles recorded by dummy eggs over a 24-h period shows that after an incubation recess there seems to be an additional heat flux that raises egg temperature above that seen during night-time periods of constant incubation. The reasons why eggs under intermittent incubation are not considerably cooler than eggs during constant incubation are discussed.展开更多
基金supported by NSFC research Grant 42274200National Key R&D Program of China 2023YFC2808900the International Space Science Institute(ISSI)in Bern,through ISSI International Team project#24-628-Precipitation of Energetic Particles from Magnetosphere and Their Effects on the Atmosphere.
文摘Geomagnetic substorms release plasma and energy from the magnetotail to the inner magnetosphere and high latitude ionosphere.In this study,we investigate substorms of different time duration,observed during the years 1982 to 2012.We measure substorm duration by a method based on the SME index.Our results demonstrate that longer-duration substorms occur more frequently during solar maximum years,and more frequently between the months of May and July,likely due to the higher polar ionospheric conductivity and more sunward geomagnetic pole directions during summer in the northern hemisphere.Additionally,longer substorms occur more frequently under stronger,longer-lasting southward IMF,and are accompanied by slower solar winds,suggesting that extended magnetic reconnection is required to drive longer substorms.Substorm durations are not significantly related to the minimum SML index,but longer substorms usually have higher SMU and continuously rising PC indices.The SME indices of long-duration substorms show a bimodal MLT distribution located near midnight and dusk after substorm onset,with the peak originally at midnight moving eastward to the morning side during the late recovery phase.Longer duration substorms have a stronger effect on the overall ring current at all MLT sectors except dawnside.Our results provide new insights into the development process and influencing factors of substorms,from the expansion phase to the recovery phase.
文摘Objective:To explore the best duration of moxibustion on lumbar disk herniation(LDH).Methods:A total of 88 patients were randomly divided into control group and 15-min,30-min,and 45-min moxibustion groups.The control group was treated with conventional therapy,while the other 3 groups were intervened with different moxibustion durations.Low back pain,dysfunction,lumbar function,and effective rates were evaluated before,in the first week and second week of intervention.Results:In low back pain,compared with the control group,the score of the 15-min group had no significant difference,but it was significantly lower in the 30-min and 45-min groups.In dysfunction and lumbar function,compared with the control group,the scores of the 15-min,30-min,and 45-min groups were significantly higher,and the scores of the 30-min and 45-min groups were significantly higher,but there was no significant difference between the 30-min and 45-min group.In effective rates,there was no significant difference between the control group and 15-min group;the effective rates of the 30-min and 45-min groups were significantly higher than those of the control group.Conclusions:Moxibustion has good therapeutic effect on LDH with specific moxibustion time.
基金Supported by National Science Foundation of China(31171855)Special R&D Fund for Plant Epidemic Prevention and Quarantine in Guangdong Province(Yuenongji201190)~~
文摘[Objective] The aim was to study on the effect of hosts on development and reproduction of mealybug （Phenacoccus solenopsis Tinsley）. [Method] Observation was conducted on developmental durations and fecundity of Phenacoccus solenopsis Tinsley fed on Gossypium spp., Nicotiana tabacum, Solanum tuberosum L and Hibiscus rosa-sinensis. [Result] There were differences among all durations, generation durations and fecundities of the mealybug adult females. Specifically, the generation durations on cotton （Gossypium spp.）, tobacco（ Nicotiana tabacum）, potato （Solanum tuberosum L） and Hibiscus rosa-sinensis were 30.2, 28.2, 37.3, and 27.7 d, and the fecundities per female were 626.0, 417.2, 552.5, and 183.2 ind., respectively. [Conclusion] The mealybug would have strong pontential in population growth when fed on cotton, tobacco and potato.
基金supported by a grant from the National Program on Key Basic Research Project(973 Program),No.2010CB530506
文摘Acupuncture is regarded as an effective therapy for cerebral ischemia. Different acupuncture ma- nipulations and durations may result in different therapeutic effects. In the present study, the Neig uan （PC6） acupoint of rats with occluded middle cerebral arteries was needled at a fixed frequency （3 Hz） with different durations, i.e., 5, 60 and 180 seconds under a twisting-rotating acupuncture method. Results showed that different durations of acupuncture had different therapeutic effects, with 60 seconds yielding a better therapeutic effect than the other two groups. This duration of treatment demonstrated rapid cerebral blood flow, encouraging recovery of neurological function, and small cerebral infarct volume. Experimental findings indicated that under 3 Hz frequency, the treatment of needling Neiguan for 60 seconds is effective for ischemic stroke.
文摘Objective: This research aims to investigate the best "Te Ding Dian Ci Bo Pu Zhi Liao Qi"(TDP) irradiation duration to enhance the efficacy of nursing and patient satisfaction.Methods: A total of 34 eligible patients were randomly divided into the treatment group(n=18) and the control group(n=16) between December 2015 and December 2016. Qualitative and quantitative studies were combined to create an impersonal evaluation of incision pain score, time of stitches removal, duration of hospital stays, patient satisfaction, and subjective experience due to different TDP irradiation durations.Results: The incision pain scores of the treatment group were 3.06±0.899 and 1.35±0.493 before and after treatment, respectively(P< 0.05), whereas those of the control group were 2.46±1.127 and 1.0±0.707 before and after treatment, respectively(P<0.05).No significant difference was found between the treatment group and the control groupup(P>0.05). The time of stitches removal and the duration of hospital stays of the treatment group were 14.85±4.070 and 19.08±6.652, respectively, whereas those of the control group were 14.08±0.641 and 23.15±10.72(P>0.05), respectively. The patient satisfaction degree score of the treatment group was2.77±0.439, whereas that of the control group was 2.08±0.954(P< 0.05).Conclusions: TDP irradiation can effectively relieve the incision pain of patients after lumbar spinal surgery. The treatment group is superior to the control group in patient satisfaction.
文摘The purpose of this study was to examine the relationship between daily activities and sleep durations for patients following elective percutaneous coronary intervention (ePCI) and diagnosed with ischemic heart disease (IHD) after discharge to their homes. The actigraph data were used to collect data from twenty five patients. The duration of night-time sleep (minutes from the start to end of night-time) and actual night-time sleep duration (total sleep duration excluding wake-up durations of night-time) on the seventh day after discharge were divided into three groups;less than 360, 360 to 480, and more than 480 minutes (short, optimal and long respectively). Subsequently, among the three groups of patients, the data were analyzed by Kruskal Wallis H-test with multiple comparison procedures using the Scheffé-test in order to compare differences in daytime activity items at seven days after discharge from the hospital. Total daytime nap duration (p p p p < 0.05). However, the duration of night-time sleep and daytime activity did not significantly differ. If actual night-time sleep duration is improved from 360 to 480 minutes, daytime nap could potentially be decreased. Determining objective sleep conditions for patients and treating sleep disorders may improve overall patient health, facilitating appropriate sleep and wake rhythms.
基金supported by the National Training Program of Innovation and Entrepreneurship for Undergraduates(No.201910389022).
文摘To clarify the contribution of oxygen vacancies to room-temperature ferromagnetism(RTFM)in cobalt doped TiO_(2)(Co-TiO_(2)),and in order to obtain the high level of magnetization suitable for spintronic devices,in this work,Co-TiO_(2) nano-particles are prepared via the sol-gel route,followed by vacuum annealing for different durations,and the influence of vacu-um annealing duration on the structure and room-temperature magnetism of the compounds is examined.The results reveal that with an increase in annealing duration,the concentration of oxygen vacancies rises steadily,while the saturation magnetiza-tion(Ms)shows an initial gradual increase,followed by a sharp decline,and even disappearance.The maximum Ms is as high as 1.19 emu/g,which is promising with respect to the development of spintronic devices.Further analysis reveals that oxygen va-cancies,modulated by annealing duration,play a critical role in tuning room-temperature magnetism.An appropriate concentra-tion of oxygen vacancies is beneficial in terms of promoting RTFM in Co-TiO_(2).However,excessive oxygen vacancies will result in a negative impact on RTFM,due to antiferromagnetic superexchange interactions originating from nearest-neighbor Co^(2+)ions.
文摘Objective:To provide information on clinical characteristics and different durations of COVID-19 and to identify the potential risk factors for longer hospitalization of patients with COVID-19.Methods:In this retrospective study,we enrolled 77 patients(age 52±20 years;44.2%males)with laboratory-confi rmed COVID-19 admitted to Beijing YouAn Hospital between January 21 and February 8,2020.Epidemiological,clinical,and radiological data on admission were collected;complications and outcomes were followed up until February 26,2020.The end point of the study was discharge alive within 2 weeks.Cox proportional-hazards regression was performed to identify risk factors for longer hospitalization.Results:Of 77 patients,there were 34 males(44.2%),24(31.2%)with comorbidities,22(28.6%)with lymphopenia,20(26.0%)with severe COVID-19,and 28(36.4%)with complications.By the end of follow-up,64 patients(83.1%)were discharged home,eight remained in hospital,and fi ve had died.Thirty-six patients(46.8%)were discharged within 14 days and thus reached the study end point,including 34 of the 57 patients with nonsevere COVID-19(59.6%)and two of the 20 patients with severe COVID-19(10%).The overall cumulative probability of the end point was 48.3%.Hospital length of stay and the duration from exposure to discharge for the 64 discharged patients were 13(10-16.5)days and 23(18-24.5)days,respectively.A multivariable stepwise Cox regression model showed that bilateral pneumonia on CT scan,shorter time from illness onset to admission,severity of disease,and lymphopenia were independently associated with longer hospitalization.Conclusions:COVID-19 has a shorter duration of disease and hospital length of stay than severe acute respiratory syndrome.Bilateral pneumonia on CT scan,shorter period from illness onset to admission,lymphopenia,and severity of disease are the risk factors for longer hospitalization of patients with COVID-19.
文摘Based on propagation-rate equations, the influence of different input pulse durations on the properties of Er^3＋/Yb^3＋ co-doped double-clad fiber amplifier at dynamic equilibrium was analyzed. The change characteristic of output power sag with pulse duration and repetition rate was shown. Whether single or multichannel input pulses are amplified, the shorter the input pulse duration is, the smaller the power sags of output pulse will be. At low repetition rate, upper gain values（Gupper） of gain swing are almost the same for different input pulse durations, which tend to the small signal gain, but lower gain value（Glower） of short input pulse is larger than that of long input pulse. At highrepetition rate, lower gain value（Glower） approaches to upper gain value（Glower）.
文摘Based on the well-known modified Angstrom formula on the relationship between the sunshine duration and the global solar radiation, this paper aimed to estimate the value of the constant a and b in Cameroon. Only five cities (Maroua, Garoua, NGaoundéré, Yaoundé and Douala) had the both available in-situ data recorded during the period of eleven years (1996-2006) beside which four others cities (Dschang, Koundja, Yoko and Manfé) had only the in-situ sunshine duration available data recorded during the period of twenty years (1986-2006). The 9 cities were grouped in 3 different climate regions. Based on the data of the 5 first cities belonging the 3 regions, the follow constant values a1 = -0.05, a2 = -0.02, a3 = -0.14 and b1 = 0.94, b2 = 0.74, b3 = 1.12 were obtained. The Root Mean Square Error (RMSE) Mean Bias Error (MBE) and correlation coefficient (r) were also determined. Then we used these values to estimate the global solar radiation for the other four remain cities. The constants a and b obtained values are in accordance with those of the West Africa region which Cameroon belongs to. So they can be employed in estimating global solar radiation of location in Cameroon paying attention only to the geographical location information.
文摘Acoustic analysis and synthesis experiments have shown that duration and intonation patterns are the two most important prosodic features responsible for the quality of synthesized speech. In this paper a set of features are proposed which will influence the duration patterns of the sequence of the sound units. These features are derived from the results of the duration analysis. Duration analysis provides a rough estimate of features, which affect the duration patterns of the sequence of the sound units. But, the prediction of durations from these features using either linear models or with a fixed rulebase is not accurate. From the analysis it is observed that there exists a gross trend in durations of syllables with respect to syllable position in the phrase, syllable position in the word, word position in the phrase, syllable identity and the context of the syllable (preceding and the following syllables). These features can be further used to predict the durations of the syllables more accurately by exploring various nonlinear models. For analying the durations of sound units, broadcast news data in Telugu is used as the speech corpus. The prediction accuracy of the duration models developed using rulebases and neural networks is evaluated using the objective measures such as percentage of syllables predicted within the specified deviation, average prediction error (μ), standard deviation (σ) and correlation coefficient (γ).
文摘Objective To investigate the effects of Dapagliflozin combined with insulin treatment on blood glucose index and pancreaticβ-cell function in overweight/obese type 2 diabetes mellitus(T2DM)patients with different disease durations.Methods A total of 288 patients with impaired pancreatic function who were treated from June 2019 to June 2020 were selected.They were divided into three groups,short duration group(≤10 years group,n=95),medium duration group(10-20 years group,n=96)and long duration group(≥20 years group,n=97).Three groups of patients were treated with Dapagliflozin in addition to the regular insulin therapy for 6 months.Clinical efficacy,blood glucose indices,pancreaticβ-cell function and complications during the treatment period were compared among the three groups.Results After treatment,there was a significant decrease in the values of three groups including WC,FPG,2 hPG,HbA,c,TC,TG,LDL-C,BMI,FIns and HOMA-IR(P<O.05).Meanwhile,HDL-C,C-P,HOMA-βand HOMA-IS values showed a significant increase(P<0.05).After treatment,WC,FPG,2 hPG,HbA,c,TC,TG,LDL-C,FIns and HOMA-IR increased in turn(P<O.05),while HDL-C,C-P,HOMA-βand HOMA-IS decreased in turn in≤1O years group,10-20 years group,≥20 years group(P<0.05).The BMI of 10-20 years group was lower than that of≤10 years group and≥20 years group(P<0.05),while the BMI of≥20 years group was higher than that of≤10 years group(P<0.05).Conclusion In overweight/obese T2DM patients with different DM durations,Dapagliflozin combined with insulin treatment shows a significant advantage in lowering blood glucose indices and improving pancreaticβ-cell function,especially for patients with a shorter disease duration.
基金supported by the R&D project of Pazhou Lab(Huangpu)under Grant 2023K0610the National Natural Science Foundation of China(Grants 12126602)+4 种基金the National Natural Science Foundation of China(Grants 82030102)the Shenzhen Medical Research Fund(Grants C2302001)the Shenzhen Science and Technology Innovation Committee(No.ZDSYS20200810171403013)the Chinese Postdoctoral Science Foundation(No.2022M721463)the Ministry of Science and Technology of China(Grants 2022YFC3702703).
文摘Objective This study aimed to investigate the impact of glycemic control and diabetes duration on subsequent myocardial infarction(MI)in patients with both coronary heart disease(CHD)and type 2 diabetes(T2D).Methods We conducted a retrospective cohort study of 33,238 patients with both CHD and T2D in Shenzhen,China.Patients were categorized into 6 groups based on baseline fasting plasma glucose(FPG)levels and diabetes duration(from the date of diabetes diagnosis to the baseline date)to examine their combined effects on subsequent MI.Cox proportional hazards regression models were used,with further stratification by age,sex,and comorbidities to assess potential interactions.Results Over a median follow-up of 2.4 years,2,110 patients experienced MI.Compared to those with optimal glycemic control(FPG<6.1 mmol/L)and shorter diabetes duration(<10 years),the fullyadjusted hazard ratio(HR)(95%Confidence Interval[95%CI])for those with a diabetes duration of≥10 years and FPG>8.0 mmol/L was 1.93(95%CI:1.59,2.36).The combined effects of FPG and diabetes duration on MI were largely similar across different age,sex,and comorbidity groups,although the excess risk of MI associated with long-term diabetes appeared to be more pronounced among those with atrial fibrillation.Conclusion Our study indicates that glycemic control and diabetes duration significant influence the subsequent occurrence of MI in patients with both CHD and T2D.Tailored management strategies emphasizing strict glycemic control may be particularly beneficial for patients with longer diabetes duration and atrial fibrillation.
文摘The relations of intensity Just Noticeable Difference (JND) to intensity for tone bursts maybe,depend on signal durations according to Jont B.Allen's [J. Acoust. Soc. Am. 102 3, 1997, 3628--3646.]. The intensity just noticeable differences for tone bursts with durations of 1 ms, 10 ms, 100 ms, 1000 ms, 5000 ms and 10000 ms were measured at different intensity levels of 20 dB, 30 dB, 40 dB, 50 dB, 60 dB, 70 dB, 80 dB, 90 dB, 100 dB. The data show that variance of Weber fraction (△I/I) with intensity is distinct from Riesz's result and SPIN theory, and that the relations between Weber fraction and intensity for signals of different durations are similar in spite of Weber fraction decreasing to asymptote with signal duration increasing. This means the difference of pulse measurement of intensity JND from Riesz's result and SPIN theory does not arise from the limited signal duration of pulse method and provides new cue for hearing research.
基金Supported by the National Research Foundation of Korea grant funded by the Korea government,No.RS-2023-00217317the Korea Health Technology R and D Project through the Korea Health Industry Development Institute funded by the Ministry of Health and Welfare,Republic of Korea,No.RS-2024-00439029.
文摘BACKGROUND Decreased renal function is a well-known risk factor for cardiovascular diseases(CVD)and death.However,the impact of diabetes duration and the glomerular filtration rate(GFR)on cardiovascular complications in patients with type 2 dia-betes has not been well studied.AIM To investigate the complex impact of longer diabetes duration and GFR on CVD and mortality.METHODS Subjects with diabetes age≥20 years,who underwent health check-ups from 2015 to 2016 were identified in the Korean National Health Insurance Service database.Based on diabetes duration,subjects were grouped into new-onset,<5 years,5–9 years,or≥10 years.The new-onset diabetes group[estimated GFR(eGFR):≥90 mL/min/1.73 m2]was the reference group.A Cox proportional hazards model adjusted for potential confounders was used to estimate the risk for myocardial infarction(MI),ischemic stroke(IS),and mortality.RESULTS During a 3.9-year follow-up of 2105228 patients,36003(1.7%)MIs,46496(2.2%)ISs,and 73549(3.5%)deaths were documented.Both longer diabetes duration and lower eGFR were independently associated with higher risks of MI,IS,and mortality,which were further amplified when these factors coexisted.Even patients with new-onset diabetes had elevated MI and IS risk at mildly reduced eGFR(60–90 mL/min/1.73 m^(2)).Mortality risk rose appreciably once eGFR declined below 60 mL/min/1.73 m^(2),particularly in those with longer diabetes duration.eGFR≥90 mL/min/1.73 m2 subgroups had higher death risk than eGFR 60–90 mL/min/1.73 m2 subgroups regardless of diabetic duration.CONCLUSION Increasing diabetes duration and decreasing eGFR are associated with increased risk of MI,IS,and mortality.For cardiovascular risk estimation,diabetes duration should be considered an important risk factor.
文摘Sleep health literacy encompasses the knowledge, motivation, and skills required to promote healthy sleep and recognize sleep disorders. In Japan, sleep-related issues are a significant contributor to prolonged student absenteeism, underscoring the urgent need to address these challenges within school health programs. This review explores the historical evolution of Japan’s perspectives on sleep, shedding light on misconceptions rooted in Neo-Confucianism (Shushigaku), such as the notion of “sacrificing sleep for achievement”. While the 2018 Work Style Reform Act has introduced measures to ensure workplace rest, similar initiatives for students remain absent, perpetuating a culture of sleep deprivation. Misunderstandings surrounding adolescent sleep patterns, chronotypes, and sleep-related health factors are addressed. The review concludes by proposing seven core principles for advancing sleep health literacy: 1) Exposure to morning light;2) Engagement in daytime physical activity;3) Resting in darkness at night;4) Consuming breakfast and avoiding late-night meals;5) Maintaining regular elimination;6) Minimizing stimulants and excessive media use;7) Respecting pre-sleep rituals. Enhancing sleep health literacy, particularly within educational settings, is vital for tackling adolescent sleep challenges and fostering long-term well-being. School health professionals must take the lead in driving this transformative initiative.
基金financially supported by the National Key R&D Program of China(No.2023YFF1305500)the National Natural Science Foundation of China(Nos.32022056,32101509,and 32171641)。
文摘Climate warming has intensified the global hydrological cycle,amplifying the differences in precipitation and soil moisture between arid and humid areas.Such a change under regional drought may alter nitrogen(N)and phosphorus(P)releases during litter decomposition in terrestrial ecosystems,but how these biogeochemical processes respond to drought differently between arid and humid areas remains unclear.Here,we compiled 259 and 138 paired observations(with and without drought conditions)to assess the global variations in the drought effects on N and P releases during litter decomposition between arid(aridity index<0.5)and humid(aridity index>0.5)areas.Litter N release increased under drought in both arid(0.35%)and humid(3.62%)areas,and P release decreased by 7.32%in arid areas but increased by 2.22%in humid areas under drought.These changes in N and P releases from decomposing litter were positively correlated with drought duration in arid areas,dependent on microclimate,edaphic factors,and litter quality.Our findings highlight the contrasting effects of drought on litter N and P releases between arid and humid ecosystems,and this differential influence will greatly improve our capability to evaluate and forecast nutrient cycling during litter decomposition under different precipitation patterns.
基金Supported by National Research Foundation of Korea(NRF)grant funded by the Korean Government(MSIT),No.RS-2023-00217317Chonnam National University Grant,No.2024-0444-01and Chonnam National University Hospital Institute for Biomedical Science,No.BCRI24032.
文摘BACKGROUND Exercise plays a key role in managing chronic conditions such as diabetes mellitus(DM),a major contributor to end-stage renal disease(ESRD),a serious public health issue.AIM To investigate the relationship between exercise intensity,DM duration,and ESRD incidence.METHODS This retrospective cohort study analyzed data from 2495031 individuals with DM who underwent the Korean National Health Screening between 2015 and 2016,with follow-up through 2022.The Cox proportional hazards model was adjusted for confounders,including age,sex,income,smoking,and baseline comorbidities.RESULTS Longer DM duration was associated with a significantly higher risk of ESRD,with durations≥10 years showing the highest risk[hazard ratio(HR):2.624,95%confidence interval(CI):2.486-2.770].Increased exercise intensity reduced the risk of developing ESRD across all diabetes duration groups,with the highest exercise category(≥1500 metabolic equivalents of task-min/week)demonstrating a protective effect compared to that of no exercise(HR:0.837,95%CI:0.791-0.886).Exercise benefits were more pronounced in patients without hypertension,non-smokers,and those with lower alcohol consumption.Additionally,ESRD risk reduction was significant among patients with a body mass index≥25 and those without proteinuria or chronic kidney disease.CONCLUSION Longer diabetes duration is associated with increased ESRD risk,while high-intensity exercise may mitigate this risk.These findings suggest promoting exercise is important for managing diabetes to reduce renal complications.
基金Supported by Wenzhou Science and Technology Bureau Project(No.Y20240062)the National Natural Science Foundation of China(No.82000861).
文摘AIM:To investigate the occurrence of eye asthenopia in Chinese adults and pinpoint the factors contributing to it using a 17-item Asthenopia Survey Questionnaire(ASQ-17).METHODS:A total of 2509 Chinese adults aged 18 and above from 30 regions in China participated in a crosssectional online survey in February 2020.The survey utilized the ASQ-17,which had been proven reliable and validated for assessing asthenopia-related symptoms experienced in the past two weeks among the Chinese population.Data on demographics and living conditions,including age,gender,humidity,air quality in their residential areas,frequency of heightened anxiety or depression,daily duration of near vision activity,sleep duration,sleep quality,and history of eye surgery,were collected.Principal component analysis and multivariate logistic regression were employed to identify independent factors associated with asthenopia.RESULTS:Out of the 2502 participants,with an average age of 31±8y included in the analysis,asthenopia was prevalent in 35.2%of cases.Multivariate analysis revealed that the most influential risk factor was poor sleep and mental well-being,which encompassed shorter daily sleep duration,lower sleep quality,and more frequent feelings of heightened anxiety or depression[odds ratio(OR):2.07,95%confidence interval(CI):1.88–2.29,P<0.001].This was followed by each additional 2h of daily near vision activity relative to 4h(OR:1.33,95%CI:1.21–1.45,P<0.001),and lower humidity and worse air quality in the residential area(OR:1.10,95%CI:1.02–1.21,P=0.019).CONCLUSION:Asthenopia is a common issue among Chinese adults,and preventative measures should focus on improving sleep and mental well-being.Further research targeting physiological exposure,different age groups or longitudinal studies to establish causality are needed to explore the role of sleep and mental status as an influencing factor.
文摘Avian incubation is characterised by the contact between the eggs and the bird's skin to transfer heat to increase egg temperature above ambient conditions. Birds can be attentive to the clutch all of the time or, particularly if only one parent incubates, attentiveness may be quite low. Attentiveness is related to egg size with large eggs having high attentiveness, whereas small eggs (<10 g) can have attentiveness ranging from 50% to 100%. Previous studies have suggested that incubation duration is a function of attentiveness albeit for small birds. This study tested the hypothesis that, after controlling for egg size and phylogeny, incubation duration would be a function of attentiveness. Data for 444 bird species representing 24 orders were analysed. Whilst egg mass had a significant relationship with incubation duration, there was no relationship with attentiveness for all of the species or a subset of the passerines. Despite egg temperature drops during an incubation recess, average day-time and night-time temperatures are similar in a range of species. Re-examination of previously reported temperature profiles recorded by dummy eggs over a 24-h period shows that after an incubation recess there seems to be an additional heat flux that raises egg temperature above that seen during night-time periods of constant incubation. The reasons why eggs under intermittent incubation are not considerably cooler than eggs during constant incubation are discussed.
