Periodic variations of warp tension during a weaving cycle result in corresponding change of back rest position, and the oscillation of back rest affects the fluctuation of warp yarn in return. A mechanical model of b...Periodic variations of warp tension during a weaving cycle result in corresponding change of back rest position, and the oscillation of back rest affects the fluctuation of warp yarn in return. A mechanical model of back rest system of looms is presented on basis of auto control theory, and the factors affecting the dynamic performance of the back rest are analyzed. In the model, warp yarn is regarded as a viscoelastic medium, and the adjustable parameters and the adjusting range of the back rest system are increased, so the loom's applicability for the fabric's variety is enhanced. Finally, the methods of designing and adjusting the back rest are discussed, and a trend of back rest system development is given.展开更多
n order to demonstrate the effects of various factors on the biosynthesis of glucose oxidase(GOD) without considering the growth status, a resting cell culture system was established. By using this system, the sequenc...n order to demonstrate the effects of various factors on the biosynthesis of glucose oxidase(GOD) without considering the growth status, a resting cell culture system was established. By using this system, the sequence of the effect of carbon sources on the biosynthesis of (GOD) could be revealed as follows: mannose>glycerol>glucose>cellulose>lactose>sucrose>galactose>soluble starch>maltose>fructose. The enzyme activity was promoted by adding tiny amount of αmethylDglucoside. When 0.1% NaNO3 was replaced by 0.05% of amino acid, Tyr, Leu, Orn and Glu were shown to have positive effect, while Phe, Ile, Lys, His and Arg have negative effect on the biosynthesis of GOD, and no net growth was observed in the above experiments. The biosynthesis of GOD was highly susceptible to the concentration of CaCl2 added, 0.01% of CaCl2 was in favor of the enzyme synthesis, whereas 0.02% was unfavorable. The starting time for GOD biosynthesis was estimated through addition of actinomycin D at various time of incubation, it turned out to be between 11～13h after inoculation.展开更多
The resting zone(RZ)in mammalian growth plates is critical for maintaining and regulating chondrocyte turnover during longitudinal bone growth as a control tower and stem cell reservoir.Although recent lineage tracing...The resting zone(RZ)in mammalian growth plates is critical for maintaining and regulating chondrocyte turnover during longitudinal bone growth as a control tower and stem cell reservoir.Although recent lineage tracing studies have identified several markers for stem cells in the RZ,these markers only partially label chondrocytes in the RZ,suggesting that the resting chondrocytes(RCs)are a heterogeneous population with different types of stem cells.Since a comprehensive marker for RCs is still lacking,the RZ is generally determined based on ambiguous histological criteria,such as small and round chondrocytes without columnar formation,which may lead to inconsistencies among researchers.Therefore,in this study,we used single-cell RNA sequencing(scRNAseq)of growth plate chondrocytes followed by validation by fluorescence in situ hybridization(FISH)to precisely annotate cell clusters in scRNAseq and search for a marker of RCs.The scRNAseq analysis revealed that apolipoprotein E(Apoe)was the tophit gene,which was ubiquitously expressed in the RC cluster.FISH confirmed that Apoe was exclusively localized to the histologically defined RZ.In newly generated Apoe^(mCherry)knock-in mice,we further confirmed that mCherry expression mirrored the distribution of Apoe-expressing chondrocytes in the RZ particularly after the formation of the secondary ossification center.These mCherry+RCs were slow cycling in vivo and exhibited stem cell properties in vitro.Moreover,APOE was detected in human growth plate RCs.These findings suggest that apolipoprotein E is a novel pan-RC marker in both mouse and human growth plates.展开更多
AIM:To analyze whether alterations of voxel mirror homology connectivity(VMHC)values,as determined by resting-state functional magnetic resonance imaging(rsfMRI),occur in cerebral regions of patients with hypertensive...AIM:To analyze whether alterations of voxel mirror homology connectivity(VMHC)values,as determined by resting-state functional magnetic resonance imaging(rsfMRI),occur in cerebral regions of patients with hypertensive retinopathy(HR)and to determine the relationship between VMHC values and clinical characteristics in patients with HR.METHODS:Twenty-one patients with HR and 21 agematched healthy controls(HCs)were assessed by rsfMRI scanning.The functional connectivity between the hemispheres of the cerebrum was assessed by measuring VMHC,with the ability of VMHC to distinguish between the HR and HC groups assessed using receiver operating characteristic(ROC)curve analysis.Differences in the demographic and clinical characteristics of the HR and HC groups were analyzed by independent sample t-tests.The relationship between average VMHC in several brain areas of HR patients and clinical features was determined using Pearson correlation analysis.RESULTS:Mean VMHC values of the bilateral cuneus gyrus(BA19),bilateral middle orbitofrontal gyrus(BA47),bilateral middle temporal gyrus(BA39)and bilateral superior medial frontal gyrus(BA9)were lower in the HR than in the HC group.CONCLUSION:VMHC values can predict the development of early HR,prevent the transformation of hypertensive microangiopathy,and provide useful information explaining the changes in neural mechanism associated with HR.展开更多
RESTful APIs have been adopted as the standard way of developing web services,allowing for smooth communication between clients and servers.Their simplicity,scalability,and compatibility have made them crucial to mode...RESTful APIs have been adopted as the standard way of developing web services,allowing for smooth communication between clients and servers.Their simplicity,scalability,and compatibility have made them crucial to modern web environments.However,the increased adoption of RESTful APIs has simultaneously exposed these interfaces to significant security threats that jeopardize the availability,confidentiality,and integrity of web services.This survey focuses exclusively on RESTful APIs,providing an in-depth perspective distinct from studies addressing other API types such as GraphQL or SOAP.We highlight concrete threats-such as injection attacks and insecure direct object references(IDOR)-to illustrate the evolving risk landscape.Our work systematically reviews state-of-the-art detection methods,including static code analysis and penetration testing,and proposes a novel taxonomy that categorizes vulnerabilities such as authentication and authorization issues.Unlike existing taxonomies focused on general web or network-level threats,our taxonomy emphasizes API-specific design flaws and operational dependencies,offering a more granular and actionable framework for RESTful API security.By critically assessing current detection methodologies and identifying key research gaps,we offer a structured framework that advances the understanding and mitigation of RESTful API vulnerabilities.Ultimately,this work aims to drive significant advancements in API security,thereby enhancing the resilience of web services against evolving cyber threats.展开更多
The dependence of energy metabolism on temperature is universally recognized as a critical physiological hallmark for evaluating the susceptibility of ectothermic organisms to global warming.However,the underlying phy...The dependence of energy metabolism on temperature is universally recognized as a critical physiological hallmark for evaluating the susceptibility of ectothermic organisms to global warming.However,the underlying physiological and biochemical bases of this temperature dependence remain largely unknown.In this study,we conducted a simulated climate warming experiment under seminatural enclosure conditions and compared the differences in resting metabolic rate (RMR) and key metabolic enzyme activities between the warming and control groups of Takydromus septentrionalis at various test temperatures.We found that the activities of hexokinase,lactate dehydrogenase,alanine aminotransferase and acetyl-CoA carboxylase of T.septentrionalis were not affected by climate warming,despite a decrease in RMR measured at high temperatures of 34°C and 38°C.Overall,these findings suggest that artificial warming simulating climate change can lead to a decline in RMR,but does not alter the activity of key metabolic enzymes.Our study provides insight into how climate warming influences the energy metabolism of lizards.展开更多
AIM:To assess the alterations in the resting-state function connections between the two cerebral hemispheres in patients with optic neuritis(ON)and healthy controls(HCs).METHODS:A total of 12 ON patients(six males and...AIM:To assess the alterations in the resting-state function connections between the two cerebral hemispheres in patients with optic neuritis(ON)and healthy controls(HCs).METHODS:A total of 12 ON patients(six males and six females)and 12 HCs(six males and six females)who were highly matched for sex,age,and educational level were recruited.They underwent functional magnetic resonance imaging(fMRI),testing and brain activities were assessed using the degree centrality(DC)method.Correlation analysis between the mean DC values in specific brain areas and behavior performances was analyzed as well.Linear correlations between A anxiety scale(AS)and depression scale(DS)values and DC values in brain regions of patients with ON were also analyzed.RESULTS:The areas that showed a higher DC value in ON patients were the right angular gyrus and bilateral precuneus,while the left insula and left superior temporal gyrus(LSTG)were regions that presented a lower DC value in ON patients.A receiver operating characteristic(ROC)curve analysis confirmed the accuracy of the area under the curve(AUC)assessment.Linear analysis showed anxiety scale(AS)and depression scale(DS)values in the left insula were both negatively correlated with DC values,while best corrected visual acuity logMAR-R(BCVA logMAR-R)showed a negative correlation with DC in the LSTG.CONCLUSION:The study explores altered brain activities of specific regions in patients with ON.The results provide clues for revealing the underlying mechanism of ON development.展开更多
Dear Editor,Sleep deprivation and loss can have detrimental effects on brain function.Among common patterns of sleep loss are delayed sleep onset(early night sleep loss,EL)and premature awakening(late night sleep loss...Dear Editor,Sleep deprivation and loss can have detrimental effects on brain function.Among common patterns of sleep loss are delayed sleep onset(early night sleep loss,EL)and premature awakening(late night sleep loss,LL).Here,we investigated the distinct impacts of EL and LL on resting-state brain activity.A total of 100 healthy students from several universities in Beijing were recruited and randomly assigned to one of three groups:EL,LL,or full sleep(FS).Restingstate functional magnetic resonance imaging(rs-fMRI)scans were conducted following the sleep manipulations.Compared to the FS group,the LL group showed abnormal low-frequency fluctuation(fALFF)in the prefrontal cortex and insula.展开更多
随着Web Geographical Information System(WebGIS)技术的快速发展,人们已不满足目前其基于简单网页技术的表现效果和交互性,而需要寻找更好的技术和方法来解决矢量地图的发布、服务器端和浏览器端更快的响应速度、更加理想的交互性等...随着Web Geographical Information System(WebGIS)技术的快速发展,人们已不满足目前其基于简单网页技术的表现效果和交互性,而需要寻找更好的技术和方法来解决矢量地图的发布、服务器端和浏览器端更快的响应速度、更加理想的交互性等瓶颈性问题,同时对系统伸缩性和开发简洁性也提出了更高的要求。为此,本文以WebGIS为研究对象,针对当前WebGIS空间数据的共享和互操作存在的问题,深入分析基于REST技术架构的GIS WEB服务技术模型,探讨如何将REST技术应用到WebGIS开发和应用中,在提高WebGIS的表现力与交互性的同时降低开发的复杂性,提高系统的可伸缩性,并有效地解决了数据的共享性和可交互性等问题。展开更多
文摘Periodic variations of warp tension during a weaving cycle result in corresponding change of back rest position, and the oscillation of back rest affects the fluctuation of warp yarn in return. A mechanical model of back rest system of looms is presented on basis of auto control theory, and the factors affecting the dynamic performance of the back rest are analyzed. In the model, warp yarn is regarded as a viscoelastic medium, and the adjustable parameters and the adjusting range of the back rest system are increased, so the loom's applicability for the fabric's variety is enhanced. Finally, the methods of designing and adjusting the back rest are discussed, and a trend of back rest system development is given.
文摘n order to demonstrate the effects of various factors on the biosynthesis of glucose oxidase(GOD) without considering the growth status, a resting cell culture system was established. By using this system, the sequence of the effect of carbon sources on the biosynthesis of (GOD) could be revealed as follows: mannose>glycerol>glucose>cellulose>lactose>sucrose>galactose>soluble starch>maltose>fructose. The enzyme activity was promoted by adding tiny amount of αmethylDglucoside. When 0.1% NaNO3 was replaced by 0.05% of amino acid, Tyr, Leu, Orn and Glu were shown to have positive effect, while Phe, Ile, Lys, His and Arg have negative effect on the biosynthesis of GOD, and no net growth was observed in the above experiments. The biosynthesis of GOD was highly susceptible to the concentration of CaCl2 added, 0.01% of CaCl2 was in favor of the enzyme synthesis, whereas 0.02% was unfavorable. The starting time for GOD biosynthesis was estimated through addition of actinomycin D at various time of incubation, it turned out to be between 11～13h after inoculation.
基金supported by the National Institute of Arthritis and Musculoskeletal and Skin Diseases of the National Institutes of Health (R01AR075733, R01AR083363, R21AR077654 to S.O.)by the Maryland Stem Cell Research Fund (MSCRF) Discovery Grant (2023-MSCRFD-6160 to S.O.)supported by the Post-Doctoral Fellowship from MSCRF (2023-MSCRFF-6176)
文摘The resting zone(RZ)in mammalian growth plates is critical for maintaining and regulating chondrocyte turnover during longitudinal bone growth as a control tower and stem cell reservoir.Although recent lineage tracing studies have identified several markers for stem cells in the RZ,these markers only partially label chondrocytes in the RZ,suggesting that the resting chondrocytes(RCs)are a heterogeneous population with different types of stem cells.Since a comprehensive marker for RCs is still lacking,the RZ is generally determined based on ambiguous histological criteria,such as small and round chondrocytes without columnar formation,which may lead to inconsistencies among researchers.Therefore,in this study,we used single-cell RNA sequencing(scRNAseq)of growth plate chondrocytes followed by validation by fluorescence in situ hybridization(FISH)to precisely annotate cell clusters in scRNAseq and search for a marker of RCs.The scRNAseq analysis revealed that apolipoprotein E(Apoe)was the tophit gene,which was ubiquitously expressed in the RC cluster.FISH confirmed that Apoe was exclusively localized to the histologically defined RZ.In newly generated Apoe^(mCherry)knock-in mice,we further confirmed that mCherry expression mirrored the distribution of Apoe-expressing chondrocytes in the RZ particularly after the formation of the secondary ossification center.These mCherry+RCs were slow cycling in vivo and exhibited stem cell properties in vitro.Moreover,APOE was detected in human growth plate RCs.These findings suggest that apolipoprotein E is a novel pan-RC marker in both mouse and human growth plates.
基金Supported by National Natural Science Foundation of China(No.82160195,No.82460203).
文摘AIM:To analyze whether alterations of voxel mirror homology connectivity(VMHC)values,as determined by resting-state functional magnetic resonance imaging(rsfMRI),occur in cerebral regions of patients with hypertensive retinopathy(HR)and to determine the relationship between VMHC values and clinical characteristics in patients with HR.METHODS:Twenty-one patients with HR and 21 agematched healthy controls(HCs)were assessed by rsfMRI scanning.The functional connectivity between the hemispheres of the cerebrum was assessed by measuring VMHC,with the ability of VMHC to distinguish between the HR and HC groups assessed using receiver operating characteristic(ROC)curve analysis.Differences in the demographic and clinical characteristics of the HR and HC groups were analyzed by independent sample t-tests.The relationship between average VMHC in several brain areas of HR patients and clinical features was determined using Pearson correlation analysis.RESULTS:Mean VMHC values of the bilateral cuneus gyrus(BA19),bilateral middle orbitofrontal gyrus(BA47),bilateral middle temporal gyrus(BA39)and bilateral superior medial frontal gyrus(BA9)were lower in the HR than in the HC group.CONCLUSION:VMHC values can predict the development of early HR,prevent the transformation of hypertensive microangiopathy,and provide useful information explaining the changes in neural mechanism associated with HR.
文摘RESTful APIs have been adopted as the standard way of developing web services,allowing for smooth communication between clients and servers.Their simplicity,scalability,and compatibility have made them crucial to modern web environments.However,the increased adoption of RESTful APIs has simultaneously exposed these interfaces to significant security threats that jeopardize the availability,confidentiality,and integrity of web services.This survey focuses exclusively on RESTful APIs,providing an in-depth perspective distinct from studies addressing other API types such as GraphQL or SOAP.We highlight concrete threats-such as injection attacks and insecure direct object references(IDOR)-to illustrate the evolving risk landscape.Our work systematically reviews state-of-the-art detection methods,including static code analysis and penetration testing,and proposes a novel taxonomy that categorizes vulnerabilities such as authentication and authorization issues.Unlike existing taxonomies focused on general web or network-level threats,our taxonomy emphasizes API-specific design flaws and operational dependencies,offering a more granular and actionable framework for RESTful API security.By critically assessing current detection methodologies and identifying key research gaps,we offer a structured framework that advances the understanding and mitigation of RESTful API vulnerabilities.Ultimately,this work aims to drive significant advancements in API security,thereby enhancing the resilience of web services against evolving cyber threats.
基金supported by the National Natural Science Foundation of China (Grant Nos.32330067,31971419,32311530110,and 32171486)。
文摘The dependence of energy metabolism on temperature is universally recognized as a critical physiological hallmark for evaluating the susceptibility of ectothermic organisms to global warming.However,the underlying physiological and biochemical bases of this temperature dependence remain largely unknown.In this study,we conducted a simulated climate warming experiment under seminatural enclosure conditions and compared the differences in resting metabolic rate (RMR) and key metabolic enzyme activities between the warming and control groups of Takydromus septentrionalis at various test temperatures.We found that the activities of hexokinase,lactate dehydrogenase,alanine aminotransferase and acetyl-CoA carboxylase of T.septentrionalis were not affected by climate warming,despite a decrease in RMR measured at high temperatures of 34°C and 38°C.Overall,these findings suggest that artificial warming simulating climate change can lead to a decline in RMR,but does not alter the activity of key metabolic enzymes.Our study provides insight into how climate warming influences the energy metabolism of lizards.
基金Supported by National Natural Science Foundation of China(No.82160195No.82460203)Key R&D Program of Jiangxi Province(No.20223BBH80014).
文摘AIM:To assess the alterations in the resting-state function connections between the two cerebral hemispheres in patients with optic neuritis(ON)and healthy controls(HCs).METHODS:A total of 12 ON patients(six males and six females)and 12 HCs(six males and six females)who were highly matched for sex,age,and educational level were recruited.They underwent functional magnetic resonance imaging(fMRI),testing and brain activities were assessed using the degree centrality(DC)method.Correlation analysis between the mean DC values in specific brain areas and behavior performances was analyzed as well.Linear correlations between A anxiety scale(AS)and depression scale(DS)values and DC values in brain regions of patients with ON were also analyzed.RESULTS:The areas that showed a higher DC value in ON patients were the right angular gyrus and bilateral precuneus,while the left insula and left superior temporal gyrus(LSTG)were regions that presented a lower DC value in ON patients.A receiver operating characteristic(ROC)curve analysis confirmed the accuracy of the area under the curve(AUC)assessment.Linear analysis showed anxiety scale(AS)and depression scale(DS)values in the left insula were both negatively correlated with DC values,while best corrected visual acuity logMAR-R(BCVA logMAR-R)showed a negative correlation with DC in the LSTG.CONCLUSION:The study explores altered brain activities of specific regions in patients with ON.The results provide clues for revealing the underlying mechanism of ON development.
基金supported by the STI2030-Major Projects(2021ZD0202100,2021ZD0200801,and 2021ZD0201900)the National Natural Science Foundation of China(82130040,82288101).
文摘Dear Editor,Sleep deprivation and loss can have detrimental effects on brain function.Among common patterns of sleep loss are delayed sleep onset(early night sleep loss,EL)and premature awakening(late night sleep loss,LL).Here,we investigated the distinct impacts of EL and LL on resting-state brain activity.A total of 100 healthy students from several universities in Beijing were recruited and randomly assigned to one of three groups:EL,LL,or full sleep(FS).Restingstate functional magnetic resonance imaging(rs-fMRI)scans were conducted following the sleep manipulations.Compared to the FS group,the LL group showed abnormal low-frequency fluctuation(fALFF)in the prefrontal cortex and insula.
文摘随着Web Geographical Information System(WebGIS)技术的快速发展,人们已不满足目前其基于简单网页技术的表现效果和交互性,而需要寻找更好的技术和方法来解决矢量地图的发布、服务器端和浏览器端更快的响应速度、更加理想的交互性等瓶颈性问题,同时对系统伸缩性和开发简洁性也提出了更高的要求。为此,本文以WebGIS为研究对象,针对当前WebGIS空间数据的共享和互操作存在的问题,深入分析基于REST技术架构的GIS WEB服务技术模型,探讨如何将REST技术应用到WebGIS开发和应用中,在提高WebGIS的表现力与交互性的同时降低开发的复杂性,提高系统的可伸缩性,并有效地解决了数据的共享性和可交互性等问题。
