Most of the current nanomedicine-based treatments for critical limb ischemia(CLI)only aim at promoting angiogenesis,ignoring the negative influence on the therapeutic effects caused by the complex pathological micro-e...Most of the current nanomedicine-based treatments for critical limb ischemia(CLI)only aim at promoting angiogenesis,ignoring the negative influence on the therapeutic effects caused by the complex pathological micro-environment of ischemic tissue.Herein,near-infrared(NIR)light-driven metal ion(Cu^(2+))-loaded polydopamine(PDA)nanomotors(JMPN@Cu^(2+))is designed and prepared.Due to the good antioxidant and anti-inflammatory activities of PDA,JMPN@Cu^(2+)exhibits excellent biocompatibility and significantly improves the ischemic micro-environment.Additionally,based on superior photothermal conversion effect and jellyfish-like structure,the nanomotors are quickly propelled under NIR laser with low energy intensity to acquire the ability of movement and facilitate intracellular uptake of JMPN@Cu^(2+)by endothelial cells,resulting in the enhanced pro-angiogenic effect of Cu^(2+).Moreover,in vivo experimental findings show that JMPN@Cu^(2+)combined with NIR irradiation can successfully accelerate blood flow recovery and improve muscle repair.Taking these results together,this kind of nanomotor can promote angiogenesis along with ischemic micro-environment amelioration,holding great potential applications for the treatment of limb ischemia.展开更多
In quantum information technologies,quantum weak measurement is beneficial for protecting coherence of systems.In order to further improve the protection effect of quantum weak measurement on coherence,we propose an o...In quantum information technologies,quantum weak measurement is beneficial for protecting coherence of systems.In order to further improve the protection effect of quantum weak measurement on coherence,we propose an optimization scheme of quantum Fisher information(QFI)protection in an open quantum system by combing no-knowledge quantum feedback control with quantum weak measurement.On the basis of solving the dynamic equations of a stochastic two-level quantum system under feedback control,we compare the effects of different feedback Hamiltonians on QFI and find that via no-knowledge quantum feedback,the observation operatorσx(orσx andσz)can protect QFI for a long time.Namely,no-knowledge quantum feedback can improve the estimation precision of feedback coefficient as well as that of detection coefficient.展开更多
For an open quantum system containing two qubits under homodyne-based feedback control, we investigate the dynamical behaviors of quantum-memory-assisted entropic uncertainty.Moreover, we analyze the influence of feed...For an open quantum system containing two qubits under homodyne-based feedback control, we investigate the dynamical behaviors of quantum-memory-assisted entropic uncertainty.Moreover, we analyze the influence of feedback modes and coefficients on the entropic uncertainty.Numerical investigations show that the memory qubit should be placed in a non-dissipative channel if the single dissipative channel condition can be chosen, which helps reduce the entropic uncertainty of the system.For the homodyne feedback control F =λσx(or F =λσy), due to different roles of the entangled qubits A and B, when they are subject to feedback control with different feedback coefficients λ, the exchange of feedback coefficients will cause variations of the entropic uncertainty.When the feedback coefficient corresponding to the memory qubit B is larger(λB >λA), the steady value of the entropic uncertainty will be small, which is conducive to enhancing the robustness of the system.However, for the feedback control F =λσz, the difference between the feedback coefficients has no effect on the steady values of the entropic uncertainty.展开更多
When confined to a single leaf, the larvae of most leafminers should suffer intense intraspecific competition. The survival and performance of individuals are expected to decline with increasing larval density within ...When confined to a single leaf, the larvae of most leafminers should suffer intense intraspecific competition. The survival and performance of individuals are expected to decline with increasing larval density within a leaf, showing a negative density-dependent effect. The maximum density of an Elachista Treitschke(Lepidoptera:Elachistidae) miner on Indocalamus tessellatus(Munro)Keng f.(Poaceae: Bambusoideae) under natural conditions can be greater than 40 per leaf, making this a good system for studying intraspecific competition and density effects.We counted the number of leaves with different mine densities in the field and found a clumped distribution of leafminer larvae among host leaves. The emergence rates of pupae(and last-instar larvae), adults and parasitoids were inversely correlated with larval density. Pupal weight and adult weight also showed negative relationships with larval density. However, pairwise tests showed that there might be no differences in pupal or adult weight at larval densities of 1–10 mines per leaf, indicating that densitydependent effects are more obvious at densities greater than 10 mines per leaf. Intraspecific competition could lead to stable density and consistent body size in surviving individual insects, which would help maintain a sustainable population size. The density threshold could be an indicator of the balance between intraspecific competitive detriments and conspecific aggregation benefits; however, the validity of the threshold density hypothesis requires further testing and confirmation.展开更多
This article reviews preservice teacher arts education university course work with the goal of informing cross-cultural competencies for Indonesian teacher education.The authors are mid-career education faculty,who vi...This article reviews preservice teacher arts education university course work with the goal of informing cross-cultural competencies for Indonesian teacher education.The authors are mid-career education faculty,who visited six universities in three countries to observe cross-cultural contents in teacher preparation courses.Cross-cultural competence relies on theories of globalization,intercultural and multicultural education.Using a case study method,the authors gathered data through relevant literature,course descriptions,met with stakeholders,wrote and coded reflective and reflexive field notes,and identified trends.These trends included the infusion of Eastern content into Western course work,and the role of Western arts forms in Eastern settings.These findings support the development of“cross-cultural communication through the arts”or“komunikasi silang budaya melalui seni”as a way of approaching cross-cultural teaching in Indonesia.展开更多
基金supported by the National Natural Science Foundation of China(No.82170515)Open Research Fund of Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy(No.XZSYSKF2021038)Jiangsu Funding Program for Excellent Postdoctoral Talent,and Changzhou Municipal Health Commission Science and Technology Project(No.ZD202126).
文摘Most of the current nanomedicine-based treatments for critical limb ischemia(CLI)only aim at promoting angiogenesis,ignoring the negative influence on the therapeutic effects caused by the complex pathological micro-environment of ischemic tissue.Herein,near-infrared(NIR)light-driven metal ion(Cu^(2+))-loaded polydopamine(PDA)nanomotors(JMPN@Cu^(2+))is designed and prepared.Due to the good antioxidant and anti-inflammatory activities of PDA,JMPN@Cu^(2+)exhibits excellent biocompatibility and significantly improves the ischemic micro-environment.Additionally,based on superior photothermal conversion effect and jellyfish-like structure,the nanomotors are quickly propelled under NIR laser with low energy intensity to acquire the ability of movement and facilitate intracellular uptake of JMPN@Cu^(2+)by endothelial cells,resulting in the enhanced pro-angiogenic effect of Cu^(2+).Moreover,in vivo experimental findings show that JMPN@Cu^(2+)combined with NIR irradiation can successfully accelerate blood flow recovery and improve muscle repair.Taking these results together,this kind of nanomotor can promote angiogenesis along with ischemic micro-environment amelioration,holding great potential applications for the treatment of limb ischemia.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61663016 and 11264015)。
文摘In quantum information technologies,quantum weak measurement is beneficial for protecting coherence of systems.In order to further improve the protection effect of quantum weak measurement on coherence,we propose an optimization scheme of quantum Fisher information(QFI)protection in an open quantum system by combing no-knowledge quantum feedback control with quantum weak measurement.On the basis of solving the dynamic equations of a stochastic two-level quantum system under feedback control,we compare the effects of different feedback Hamiltonians on QFI and find that via no-knowledge quantum feedback,the observation operatorσx(orσx andσz)can protect QFI for a long time.Namely,no-knowledge quantum feedback can improve the estimation precision of feedback coefficient as well as that of detection coefficient.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61663016 and 11404150)
文摘For an open quantum system containing two qubits under homodyne-based feedback control, we investigate the dynamical behaviors of quantum-memory-assisted entropic uncertainty.Moreover, we analyze the influence of feedback modes and coefficients on the entropic uncertainty.Numerical investigations show that the memory qubit should be placed in a non-dissipative channel if the single dissipative channel condition can be chosen, which helps reduce the entropic uncertainty of the system.For the homodyne feedback control F =λσx(or F =λσy), due to different roles of the entangled qubits A and B, when they are subject to feedback control with different feedback coefficients λ, the exchange of feedback coefficients will cause variations of the entropic uncertainty.When the feedback coefficient corresponding to the memory qubit B is larger(λB >λA), the steady value of the entropic uncertainty will be small, which is conducive to enhancing the robustness of the system.However, for the feedback control F =λσz, the difference between the feedback coefficients has no effect on the steady values of the entropic uncertainty.
基金funded by the National Natural Science Foundation of China(31760173,31260116 and 41361009)Young Scientists Training Plan of Jiangxi Province(20133BCB23026)+1 种基金National Natural Science Foundation of Jiangxi Province(20171BAB204023)Innovation Team Project of Gannan Normal University
文摘When confined to a single leaf, the larvae of most leafminers should suffer intense intraspecific competition. The survival and performance of individuals are expected to decline with increasing larval density within a leaf, showing a negative density-dependent effect. The maximum density of an Elachista Treitschke(Lepidoptera:Elachistidae) miner on Indocalamus tessellatus(Munro)Keng f.(Poaceae: Bambusoideae) under natural conditions can be greater than 40 per leaf, making this a good system for studying intraspecific competition and density effects.We counted the number of leaves with different mine densities in the field and found a clumped distribution of leafminer larvae among host leaves. The emergence rates of pupae(and last-instar larvae), adults and parasitoids were inversely correlated with larval density. Pupal weight and adult weight also showed negative relationships with larval density. However, pairwise tests showed that there might be no differences in pupal or adult weight at larval densities of 1–10 mines per leaf, indicating that densitydependent effects are more obvious at densities greater than 10 mines per leaf. Intraspecific competition could lead to stable density and consistent body size in surviving individual insects, which would help maintain a sustainable population size. The density threshold could be an indicator of the balance between intraspecific competitive detriments and conspecific aggregation benefits; however, the validity of the threshold density hypothesis requires further testing and confirmation.
文摘This article reviews preservice teacher arts education university course work with the goal of informing cross-cultural competencies for Indonesian teacher education.The authors are mid-career education faculty,who visited six universities in three countries to observe cross-cultural contents in teacher preparation courses.Cross-cultural competence relies on theories of globalization,intercultural and multicultural education.Using a case study method,the authors gathered data through relevant literature,course descriptions,met with stakeholders,wrote and coded reflective and reflexive field notes,and identified trends.These trends included the infusion of Eastern content into Western course work,and the role of Western arts forms in Eastern settings.These findings support the development of“cross-cultural communication through the arts”or“komunikasi silang budaya melalui seni”as a way of approaching cross-cultural teaching in Indonesia.
