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emission colour tuning in KLnF_(4):Yb^(3+),er^(3+)/Ho^(3+)phosphor

Journal of Rare.earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gayathri e Vijayatha V Ramasubramanian S Thiyagarajan p Department of Science and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Department of Sciences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Department of physics Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)phosphors were.pre.are. by solid-state re.ction *** each of the Yb^(3+)/er^(3+)and Yb^(3+)/Ho^(3+)co-doped phosphors independently,phase confirmation and morphological examination we.e.accomplished using the X-ray diffraction technique and scanning electron microscope analysis.X-ray photoelectron spectroscopy analysis shows the charge state and existence of lanthanides and *** luminescence emissions of gre.n and re. colour were.detected for the synthesized *** changes in the upconverted emission intensities and colour output pertaining to the change of the lanthanide host matrix along with dopants were.investigated for the pre.are. *** the upconversion luminescence,erbium-doped samples exhibit a pre.ominance of re. emission while holmium-doped samples display a pre.alence of gre.n *** rare.earth er/Ho doped KYbF4shows strong re. emission compare. to other ***_(4):Yb,er/Ho exhibits re.atively significant gre.n upconve rsion emissions,while Yb,er-doped KGdF_(4)host displays a 10-fold incre.se in gre.n/re. emission ratio with an incre.se in the input power of 20-780 *** photoluminescence studies and decay curve analysis were.carried out using UV light excitation for the developed phosphors.A higher lifetime of 2.2 ms was measure. for the downshifting re. emission in the Ho doped KYbF_(4)*** study suggests a potential for colour tunability in the upconversion and downshifting emissions through host modifications to the fluoride phosphor.

关键词： Rare.earths energy transfer upconversion Downshifting Colour coordinates

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Mesenchymal stem cells in wound healing:A bibliometric analysis as a powerful re.earch tool

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World Journal of Stem Cells 2024年第9期16卷 827-831页

作者： Vera V Voinova Daria V Vasina anton p Bonartsev Faculty of Biology MV Lomonosov Moscow State UniversityMoscow 119234Russia NF Gamaleya National re.earch Centre.for epidemiology and Microbiology Ministry of Health of the Russian FederationMoscow 123098Russia

Bibliographic analysis is still very rare.y used in experimental basic study *** compre.ensive bibliometric analysis of scientific literature.on re.earch progre.s and challenges in stem cell therapy for diabetic chronic wounds,which was conducted in the work of Shi et al can be a case study and a source of valuable information for writing re.iews and experimental papers in this *** experimental studies on a role of mesenchymal stem cells(MSCs)in wound healing that are.published in 2023-2024,such as Zhang et al in 2023,Hu et al in 2023,Wang et al in 2023 are.certainly also subjects for applying this powerful tool to analyze curre.t re.earch,challenges and perspectives in this *** is due to the fact that these studies have addre.sed a gre.t variety of aspects of the application of MSCs for the tre.tment of chronic wounds,such as using both the cells themselves and their various products:Sponges,hydrogels,exosomes,and genetic *** a wide variety of dire.tions in the field of study and biomedical application of MSCs re.uire. a deep understanding of the curre.t state of re.earch in this are.,which can be provided by bibliometric ***,the use of such elements of bibliographic analysis as publication count by year and analysis of top-10 keywords calculated independently or cited from bibliometric analysis studies can be safely re.ommended for every basic study manuscripts,primarily for the“Introduction”section,and re.iew.

关键词： Bibliometric analysis Mesenchymal stem cells Wound healing Tissue engineering Dre.sing Hydrogels Matrix exosomes

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Chromomagnetic dipole moments of light quarks in the bestest little Higgs model

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Chinese physics C 2024年第10期48卷 125-136页

作者： T.Cisneros-pére. e.Cruz-Albaro A.Y.Ojeda-Castañeda S.e.Solís-Núñez Unidad Académica de Ciencias Químicas Universidad Autónoma de ZacatecasApartado Postal C-58598060 ZacatecasMexico Facultad de Física Universidad Autónoma de ZacatecasApartado Postal C-58098060 ZacatecasMexico

In this study,we investigated the anomalous Chromomagnetic Dipole Moment(CMDM),denoted as μ_(q)^(BLHM),of light quarks q=(u,c,d,s,b) within the framework of the Bestest Little Higgs Model(BLHM)as an extension of the Standard Model(SM).Our investigation encompassed novel interactions among the light quarks,heavy quark B,and heavy bosons (W'^(±),H^(±),φ^(±),η^(±))incorporating the extended Cabibbo-Kobayashi-Maskawa(CKM)matrix characteristic of the *** thoroughly explore. the permissible parameter space,yielding a spectrum of CMDM values ranging from 10^(-10) to 10^(-3).

关键词： beyond standard model flavor physics chromomagnetic dipole light quarks

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exploring the effects of anthropogenic disturbance on pre.ator inspection activity in Trinidadian guppies

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Curre.t Zoology 2024年第1期70卷 109-111页

作者： Alix J.p Brusseau Laure.ce.e.a.Feyten Adam L.Crane Grant e.Brown Department of Biology Concordia UniversityMontrealQCH4B 1R6Canada Department of Biomedical Sciences WCVMUniversity of SaskatchewanSaskatoonSKCanada

pre. animals are.often faced with uncertainty due to having imperfect information re.arding curre.t local conditions,including pre.ation risks and the availability of re.iable foraging opportunities(Dall 2010).As this uncertainty incre.ses,the probability of making costly behavioral errors also incre.ses,leading to more.risk averse behavioral tactics(Feyten et al.2019).For example,Trinidadian guppies poecilia re.iculata are.far more.risk averse when faced with multiple unknown sources of risk assessment information than when faced with a mix of known and unknown cues(Feyten et al.2019).pre. can re.uce uncertainty by gathering and integrating private and social information re.arding curre.t risk levels within microhabitats(Dall 2010;Munoz and Blumstein 2012).

关键词： human disturbance information availability information re.iability pre.ator-pre. interactions risk assessment uncertainty

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Simplified seismic scenario analysis of existing masonry buildings accounting for local site effects

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Frontiers of Structural and Civil engineering 2024年第2期18卷 309-318页

作者： Ayşe e.ÖZSOYÖZBAY Işıl SANRI KARApINAR Zehra N.KUTLU İsmail e.KILIÇ Department of Civil engineering Maltepe UniversityIstanbul 34857Turkey School of engineering and Construction Oryx Universal CollegeDoha 12253Qatar

This study discusses the effects of local sites and hazard amplification on the seismic vulnerability assessment of existing masonry *** this context,a rapid seismic evaluation procedure.was implemented on an old masonry building stock in the historical center Galata,located inİstanbul,to determine the seismic risk priority of the built *** scenarios were.ge.e.ated for all soil classes,differe.t moment magnitudes,and source-to-site distances to obtain more.accurate re.ults for the seismic vulnerability assessment of the studied building ***,damage distributions estimated under nine differe.t scenarios with/without site effects were.compare. and illustrated in maps to discuss changes in vulnerability owing to amplification *** this study,by re.e.amining the rapid seismic evaluation procedure.by including geo-hazard-based assessment,the importance of site effects on the vulnerability and risk assessment of built heritage was *** proposed framework integrating field data and local site effects is believed to advance the curre.t applications for vulnerability assessment of masonry buildings and provide an improvement in the application of rapid seismic assessment procedure. with more.re.iable re.ults.

关键词： masonry buildings seismic vulnerability assessment cultural heritage local site effect

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CLASSIFICATIONS OF DUpIN HYpeRSURFACeS IN LIe SpHere.GeOMeTRY

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Acta Mathematica Scientia 2024年第1期44卷 1-36页

作者： Thomas e.CeCIL Department of Mathematics and Computer Science College of the Holy CrossWorcesterMA01610USA

This is a survey of local and global classification re.ults concerning Dupin hypersurfaces in S^(n)(or R^(n))that have been obtained in the context of Lie sphere.*** emphasis is on re.ults that re.ate Dupin hypersurfaces to isoparametric hypersurfaces in *** with these classification re.ults,many important concepts from Lie sphere.geometry,such as curvature.sphere.,Lie curvature.,and Legendre.lifts of submanifolds of S^(n)(or R^(n)),are.described in *** paper also contains se.e.al important constructions of Dupin hypersurfaces with certain special properties.

关键词： Dupin hypersurfaces isoparametric hypersurfaces Lie sphere.geometry Lie sphere.transformations Lie curvature.

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Investigating the impact of the universal function of the nuclear proximity potential in heavy-ion fusion cross sections

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Communications in Theore.ical physics 2024年第5期76卷 86-93页

作者： R Gharaei e Sarvari Department of physics Sciences FacultyHakim Sabzevari UniversityPO Box 397SabzevarIran Department of physics Faculty of ScienceFerdowsi University of MashhadPO Box 91775-1436MashhadIran Science Faculty Department of PhysicsTarbiat Modares UniversityTehranIran

The fusion barriers and cross sections of 15 colliding systems with 320≤Z_(1)Z_(2)≤1512 are.investigated in detail to understand the influence of the universal function of proximity potential formalism in the heavy-ion fusion *** re.lize this goal,we select thre. versions of the phenomenological proximity potentials,including prox.77,Zhang 2013,and Guo 2013,to calculate the nucleus-nucleus *** experimental fusion cross sections for the selected re.ctions are.analyzed using the standard coupled-channel calculations,including couplings to the low-lying 2^(+)and 3^(-)states in the target and *** calculated re.ults show that the universal functions of the Guo 2013 and prox.77 models provide the lowest and highest fusion barriers,*** addition,it is found that the height of the fusion barriers is enhanced by incre.sing the mass number of the projectile from light to heavy *** highest sensitivity to the mass number of the projectile belongs to the re.ults of prox.77.A discussion is also pre.ented on the influence of the universal function on the radial behavior of the interaction potential in the allowed re.ion for overlapping *** re.ults re.eal that the best fit to the experimental data of the fusion cross sections for the re.ctions involving light and medium nuclei is obtained using the universal function of the Zhang 2013 *** the heavier systems,the re.ults of the Guo 2013 model at sub-barrier energies provide a good description of the available data.

关键词： fusion re.ctions proximity-type potentials universal function coupled-channel calculations

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Are.hydrides under high-pre.sure.high-temperature.superconductors?

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National Science re.iew 2024年第7期11卷 9-12页

作者： J.e.Hirsch Department of physics University of California

Contrary to the curre.t consensus, I argue that the existing evidence for high-temperature.superconductivity in hydrides under high pre.sure.is not compelling. I suggest that the focus of the field should urgently shift to establish unequivocally experimentally whether or not superconductivity in pre.surized hydrides exists, instead of continuing to search for new materials that might show elusive signals of unproven superconductivity at ever higher temperature.. The implications of a negative finding for the theore.ical understanding of superconductivity are.discussed.

关键词： Hydrides

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paper Analytical Device for the Colourimetric Detection of Alkaline phosphatase in Serum and Saliva

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Journal of Analysis and Testing 2024年第3期8卷 385-394页

作者： D.Alageswari A.LakshmiDevi p.e.re.mi p.V.Suneesh Aarathipradeep T.G.SatheeshBabu Department of Chemistry Amrita School of Physical Sciences Coimbatore Amrita Vishwa Vidyapeetham Amrita Biosensor re.earch Lab Amrita School of Engineering Coimbatore Amrita Vishwa Vidyapeetham Amrita Biomedical engineering Centre. Amrita School of Engineering Coimbatore Amrita Vishwa Vidyapeetham

A paper analytical device (pAD) was developed for the colourimetric estimation of alkaline phosphatase (ALp). ALp catalyzes the hydrolysis of disodium phenyl phosphate (DSpp) to phenol, which then undergoes oxidative coupling with4-aminoantipyrine (4-AAp) producing a re.dish brown-coloure. quinone imine. The colourimetric re.ction tested in solution has been translated onto a pAD for the point of care.(poC) testing of ALp. A uniform colour was obtained in 25 min with the introduction of ALp onto the re.gent drop cast paper device. The images obtained by scanning the pAD were.processed using ImageJ software. The colour intensity obtained by image processing was proportional to the concentration of ALp pre.ent in the sample. ALp in serum and saliva samples were.tested using the pAD in the range of 0 to 528 U/L and0 to 187 U/L, re.pectively. The interfere.ce studies re.ealed that the pAD was selective to ALp in the pre.ence of other biomolecules. The pAD exhibited a limit of detection (LOD) of 3.3 U/L and a sensitivity of 48.36 a.u/Log(U/L) for serum ALp and LOD of 1.69 U/L and a sensitivity of 28.5 a.u/Log (U/L) for salivary ALp. The pAD showed good agre.ment with the clinical methods for re.l samples.

关键词： Alkaline phosphatase Colourimetry ImageJ paper analytical device point of care.testing

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FSCIL-eACA: Few-Shot Class-Incre.ental Learning Network Based on embedding Augmentation and Classifier Adaptation for Image Classification

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Chinese Journal of electronics 2024年第1期33卷 139-152页

作者： Ruru ZHANG Haihong e Meina SONG School of Computer Science Beijing University of Posts and Telecommunications education Department Information Network engineering re.earch Center Beijing University of Posts and Telecommunications

The ability to learn incre.entally is critical to the long-term operation of AI systems. Benefiting from the power of few-shot class-incre.ental learning(FSCIL), deep learning models can continuously re.ognize new classes with only a few samples. The difficulty is that limited instances of new classes will lead to overfitting and exacerbate the catastrophic forgetting of the old classes. Most pre.ious works alleviate the above problems by imposing strong constraints on the model structure.or parameters, but ignoring embedding network transferability and classifier adaptation(CA), failing to guarantee the efficient utilization of visual feature. and establishing re.ationships between old and new classes. In this paper, we propose a simple and novel approach from two perspectives: embedding bias and classifier bias. The method learns an embedding augmented(eA) network with cross-class transfer and class-specific discriminative abilities based on self-supervised learning and modulated attention to alleviate embedding bias. Based on the adaptive incre.ental classifier learning scheme to re.lize incre.ental learning capability,guiding the adaptive update of prototypes and feature.embeddings to alleviate classifier bias. We conduct extensive experiments on two popular natural image datasets and two medical datasets. The experiments show that our method is significantly better than the baseline and achieves state-of-the-art re.ults.

关键词： Training Adaptation models Visualization Image re.ognition prototypes Self-supervised learning power capacitors

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