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Photoluminescence upgradation of La_(2)MgTiO_(6):2%Dy^(3+) perovskite with monovalent(Li^(+)),divalent(Ba^(2+),Sr^(2+)) and trivalent(Bi^(3+),Sm^(3+))cation sensitization

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journal of Rare Earths 2025年第1期43卷 47-56,I0002页

作者： V.P.Veena K.Arun c.K.Shilpa S.V.jasira K.M.Nissamudeen School of Pure and Applied Physics Kannur UniversityPayyanur CampusEdatKannurKrala67 India Department of Nanoscience and Nanotechnology Kannur UniversityPayyanur CampusEdatkannurKerala670327India

Nano phosphors of 2%Dy^(3+)(wt%)doped La_(2)MgTiO_(6) and monovalent/divalent/trivalent co-doped La_(1.98)Dy_(0.02)MgTiO_(6):x%A^(y+)(A^(y+):Li+,Ba^(2+),Sr^(2+),Bi^(3+),and Sm^(3+);0≤x≤2 wt%)were synthesized by combustion *** the XRD data,it is deduced that an increase in the valency of co-dopant increases the crystallinity of the double perovskite orthorhombic nanocrystal *** an increase in co-dopant size,an elevation in optical bandgap is visible with the highest bandgap of 3.835 eV for Bi^(3+).The photo-absorption is monotonically broadened for Sr^(2+),Sm^(3+),and Li+around 200-450 ***351 nm,Dy^(3+)triggered lattice shows major characteristic emission peaks at 480 nm(^(4)F_(9/2)→^(6)H_(15/2)),574 nm(^(4)F_(9/2)→^(6)H_(13/2)),and 670 nm(^(4)F_(9/2)→^(6)H_(11/2)).leading to near white light emission with cIE coordinates(0.341,0.376).Upon co-doping,the PL intensity is significantly increased with maximum emission for trivalent Sm^(3+),followed by divalent Sr^(2+)and monovalent Li+*** increasing excitation wavelength,Sr^(2+)shows a dominated output and it is found that divalent Sr^(2+)is a potential codopant that could enhance luminescence intensity up to 6 times with a Sr^(2+)→Dy^(3+)energy transfer efficiency of 86%.It is specified that the cIE coordinates of Li+co-doped samples show ideal white emission with color coordinates(0.333,0.336).The concluding outcomes signify the noblest rare earth Sm^(3+)co-doping and thus Sm^(3+)→Dy^(3+)energy transfer mechanism is discussed in detail.

关键词： Photoluminescence Perovskite WLED co-doping Rareearths

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Numerical Simulation of Blood Flow Dynamics in a Stenosed Artery Enhanced by copper and Alumina Nanoparticles

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computer Modeling in Engineering & Sciences 2025年第2期142卷 1839-1864页

作者： Haris Alam Zuberi Madan Lal Amol Singh Nurul Amira Zainal Ali j.chamkha Department of Applied Mathematics M.J.P.Rohilkhand UniversityBareilly243006India Fakulti Teknologi dan Kejuruteraan Mekanikal Universiti Teknikal MalaysiaMelaka76100Malaysia Forecasting and Engineering Technology Analysis(FETA)Research Group Universiti Teknikal MalaysiaMelaka76100Malaysia Faculty of Engineering Kuwait College of Science and TechnologyDoha35004Kuwait

Nanotechnology holds immense importance in the biomedical field due to its ability to revolutionize healthcare on a molecular *** by the imperative of enhancing patient outcomes,a comprehensive numerical simulation study on the dynamics of blood flow in a stenosed artery,focusing on the effects of copper and alumina nanoparticles,is *** study employs a 2-dimensional Newtonian blood flow model infused with copper and alumina nanoparticles,considering the influence of a magnetic field,thermal radiation,and various flow *** governing differential equations are first non-dimensionalized to facilitate analysis and subsequently solved using the 4th order collocation method,bvp4c module in *** approach obtains velocity and temperature profiles,revealing the impact of relevant parameters crucial in the biomedical *** findings of this study underscore the significance of understanding blood flow dynamics in stenosed arteries and the potential benefits of utilizing copper and alumina nanoparticles in treatment *** incorporation of nanoparticles introduces novel avenues for enhancing therapeutic interventions,particularly in mitigating the effects of *** elucidation of velocity and temperature profiles provides valuable insights into the behavior of blood flow under different conditions,thereby informing the development of targeted biomedical *** arterial curvature flow parameter influences temperature profiles,with increased parameters promoting more efficient heat *** elevated values of Prandtl number and thermal radiation parameter showcase the diminished temperature profiles,indicating stronger dominance of momentum diffusion over thermal diffusion and radiative heat transfer *** analysis of the pertinent physical parameters reveals that the Prandtl number has the most significant impact on blood flow dynamics.A statistical analysis of the present results and exist

关键词： Blood flow simulation stenosis copper and alumina nanoparticles thermal radiation curvature parameter

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Deep view of composite SNR cTA1 with LHAASO in γ-rays up to 300 TeV

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Science china(Physics,Mechanics & Astronomy) 2025年

作者： Zhen cao F.Aharonian Axikegu Y.X.Bai Y.W.Bao D.Bastieri X.j.Bi Y.j.Bi W.Bian A.V.Bukevich Q.cao W.Y.cao Zhe cao j.chang j.F.chang A.M.chen E.S.chen H.X.chen Liang chen Lin chen Long chen M.j.chen M.L.chen Q.H.chen S.chen S.H.chen S.Z.chen T.L.chen Y.chen N.cheng Y.D.cheng M.c.chu M.Y.cui S.W.cui X.H.cui Y.D.cui B.Z.Dai H.L.Dai Z.G.Dai Danzengluobu X.Q.Dong K.K.Duan j.H.Fan Y.Z.Fan j.Fang j.H.Fang K.Fang c.F.Feng H.Feng L.Feng S.H.Feng X.T.Feng Y.Feng Y.L.Feng S.Gabici B.Gao c.D.Gao Q.Gao W.Gao W.K.Gao M.M.Ge T.T.Ge L.S.Geng G.Giacinti G.H.Gong Q.B.Gou M.H.Gu F.L.Guo j.Guo X.L.Guo Y.Q.Guo Y.Y.Guo Y.A.Han O.A.Hannuksela M.Hasan H.H.He H.N.He j.Y.He Y.He Y.K.Hor B.W.Hou c.Hou X.Hou H.B.Hu Q.Hu S.c.Hu c.Huang D.H.Huang T.Q.Huang W.j.Huang X.T.Huang X.Y.Huang Y.Huang Y.Y.Huang X.L.ji H.Y.jia K.jia H.B.jiang K.jiang X.W.jiang Z.j.jiang M.jin M.M.Kang I.Karpikov D.Khangulyan D.Kuleshov K.Kurinov B.B.Li c.M.Li cheng Li cong Li D.Li F.Li H.B.Li H.c.Li jian Li jie Li K.Li S.D.Li W.L.Li W.L.Li X.R.Li Xin Li Y.Z.Li Zhe Li Zhuo Li E.W.Liang Y.F.Liang S.j.Lin B.Liu c.Liu D.Liu D.B.Liu H.Liu H.D.Liu j.Liu j.L.Liu M.Y.Liu R.Y.Liu S.M.Liu W.Liu Y.Liu Y.N.Liu Q.Luo Y.Luo H.K.Lv B.Q.Ma L.L.Ma X.H.Ma j.R.Mao Z.Min W.Mitthumsiri H.j.Mu Y.c.Nan A.Neronov K.c.Y.Ng L.j.Ou P.Pattarakijwanich Z.Y.Pei j.c.Qi M.Y.Qi B.Q.Qiao j.j.Qin A.Raza D.Ruffolo A.Sáiz M.Saeed D.Semikoz L.Shao O.Shchegolev X.D.Sheng F.W.Shu H.c.Song Yu.V.Stenkin V.Stepanov Y.Su D.X.Sun Q.N.Sun X.N.Sun Z.B.Sun j.Takata P.H.T.Tam Q.W.Tang R.Tang Z.B.Tang W.W.Tian L.H.Wan c.Wang c.B.Wang G.W.Wang H.G.Wang H.H.Wang j.c.Wang Kai Wang Kai Wang L.P.Wang L.Y.Wang P.H.Wang R.Wang W.Wang X.G.Wang X.Y.Wang Y.Wang Y.D.Wang Y.j.Wang Z.H.Wang Z.X.Wang Zhen Wang Zheng Wang D.M.Wei j.j.Wei Y.j.Wei T.Wen c.Y.Wu H.R.Wu Q.W.Wu S.Wu X.F.Wu Y.S.Wu S.Q.Xi j.Xia G.M.Xiang D.X.Xiao G.Xiao Y.L.Xin Y.Xing D.R.Xiong Z.Xiong D.L.Xu R.F.Xu R.X.Xu W.L.Xu L.Xue D.H.Yan j.Z.Yan T.Yan c.W.Yang c.Y.Yang F.Yang F.F.Yang L.L.Yang M.j.Yang R.Z.Yang W.X.Yang Y.H.Yao Z.G.Yao L.Q.Yin N.Yin X.H.You Z.Y.You Y.H Southwest jiaotong University School of Astronomy and Space Science Nanjing University center for Astrophysics Guangzhou University Tsung-Dao Lee Institute & School of Physics and Astronomy Shanghai jiao Tong University Institute for Nuclear Research of Russian Academy of Sciences Hebei Normal University University of Science and Technology of china LHAASO collaboration State Key Laboratory of Particle Detection and Electronics Key Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy Purple Mountain Observatory chinese Academy of Sciences Research center for Astronomical computing Zhejiang Laboratory Key Laboratory for Research in Galaxies and cosmology Shanghai Astronomical Observatory chinese Academy of Sciences School of Physics and Astronomy Key Laboratory of Particle Astrophysics & Experimental Physics Division & computing center Yunnan University Key Laboratory of cosmic Rays (Tibet University) Ministry of Education Department of Physics The chinese University of Hong Kong Key Laboratory of Radio Astronomy and Technology National Astronomical Observatories chinese Academy of Sciences School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai) Sun Yat-sen University Institute of High Energy Physics Institute of Frontier and Interdisciplinary Science Shandong University APc Université Paris cité cNRS/IN2P3 cEA/IRFU Observatoire de Paris Department of Engineering Physics & Department of Astronomy Tsinghua University School of Physics and Microelectronics chinese Academy of Sciences Zhengzhou University Yunnan Observatories chinese Academy of Sciences china center of Advanced Science and Technology college of Physics Sichuan University School of Physics Peking University Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and Technology University of chinese Academy of Sciences Guangxi University Department of Physics Faculty of Science Mahidol University Moscow Institute

The ultra-high-energy（UHE） gamma-ray source 1LHAASO j0007+7303u is positionally associated with the composite SNR cTA1 that is located at high Galactic Latitude b ≈ 10.5°. This provides a rare opportunity to spatially resolve the component of the pulsar wind nebula（PWN） and supernova remnant（SNR） at UHE. This paper conducted a dedicated data analysis of 1LHAASO j0007+7303u using the data collected from December 2019 to july 2023. This source is well detected with significances of 21σ and 17σ at 8-100 TeV and >100 TeV, respectively. The corresponding extensions are determined to be 0.23°±0.03°and 0.17°±0.03°. The emission is proposed to originate from the relativistic electrons accelerated within the PWN of PSR j0007+7303. The energy spectrum is well described by a power-law with an exponential cutoff function dN/dE =（42.4 ± 4.1）(E/（20 TeV）)-2.31±0.11exp(-E/（110±25 TeV）) TeV-1cm-2s-1in the energy range from 8 to 300 TeV, implying a steady-state parent electron spectrum dNe/dEe∝(Ee/（100 TeV）)-3.13±0.16exp[(-Ee/（373±70 TeV）)2] at energies above ≈ 50 TeV. The cutoff energy of the electron spectrum is roughly equal to the expected current maximum energy of particles accelerated at the PWN terminal shock. combining the X-ray and gamma-ray emission, the current space-averaged magnetic field can be limited to≈ 4.5 μG. To satisfy the multi-wavelength spectrum and the γ-ray extensions, the transport of relativistic particles within the PWN is likely dominated by the advection process under the free-expansion phase assumption.

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LHAASO detection of very-high-energy γ-ray emission surrounding PSR j0248+6021

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Science china(Physics,Mechanics & Astronomy) 2025年

We report the detection of an extended very-high-energy(VHE) γ-ray source coincident with the location of middle-aged(62.4 kyr) pulsar PSR j0248+6021, by using the LHAASO-WcDA data of live 796 d and LHAASO-KM2A data of live 1216d. A significant excess of γ-ray induced showers is observed both by WcDA in energy bands of 1-25 Te V and KM2A in energy bands of >25 TeV with 7.3σ and 13.5σ, respectively. The best-fit position derived through WcDA data is R.A. = 42.06°± 0.12°and Dec. = 60.24°± 0.13°with an extension of 0.69°±0.15°and that of the KM2A data is R.A.= 42.29°± 0.13°and Dec. =60.38°± 0.07°with an extension of 0.37°±0.07°. No clear extended multiwavelength counterpart of this LHAASO source has been found from the radio band to the GeV band. The most plausible explanation of the VHE γ-ray emission is the inverse compton process of highly relativistic electrons and positrons injected by the pulsar. These electrons/positrons are hypothesized to be either confined within the pulsar wind nebula or to have already escaped into the interstellar medium, forming a pulsar halo.

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Limited evidence to support demineralized bone matrix in foot and ankle surgical procedures:A systematic review

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World journal of Orthopedics 2025年第1期16卷 57-67页

作者： Hayden Hartman james j Butler Megan calton charles c Lin Samantha Rettig jared c Tishelman Sebastian Krebsbach Grace W Randall john G Kennedy Department of Medicine Lincoln Memorial UniversityKnoxvilleTN 37752United States Department of Orthopedic Surgery NYU Langone HealthNew YorkNY 10002United States Department of Medicine Royal College of Surgeons in IrelandDublin D02 YN77LeinsterIreland

BAcKGROUND Demineralized bone matrix(DBM)is a commonly utilized allogenic bone graft substitute to promote osseous ***,little is known regarding outcomes following DBM utilization in foot and ankle surgical *** To evaluate the clinical and radiographic outcomes following DBM as a biological adjunct in foot and ankle surgical *** During May 2023,the PubMed,EMBASE and cochrane library databases were systematically reviewed to identify clinical studies examining outcomes following DBM for the management of various foot and ankle *** regarding study characteristics,patient demographics,subjective clinical outcomes,radiological outcomes,complications,and failure rates were extracted and *** addition,the level of evidence(LOE)and quality of evidence(QOE)for each individual study was also *** studies were included in this *** In total,363 patients(397 ankles and feet)received DBM as part of their surgical procedure at a weighted mean follow-up time of 20.8±9.2 *** most common procedure performed was ankle arthrodesis in 94 patients(25.9%).Other procedures performed included hindfoot fusion,1st metatarsophalangeal joint arthrodesis,5th metatarsal intramedullary screw fixation,hallux valgus correction,osteochondral lesion of the talus repair and unicameral talar cyst *** osseous union rate in the ankle and hindfoot arthrodesis cohort,base of the 5th metatarsal cohort,and calcaneal fracture cohort was 85.6%,100%,and 100%,*** weighted mean visual analog scale in the osteochondral lesions of the talus cohort improved from a pre-operative score of 7.6±0.1 to a post-operative score of 0.4±*** overall complication rate was 27.2%,the most common of which was non-union(8.8%).There were 43 failures(10.8%)all of which warranted a further surgical *** This current systematic review demonstrated that the utilization of DBM in foot and ankle surgical proced

关键词： Demineralized bone matrix Allogenic bone graft osseous union Biological adjunct Systematic review Bone morphogenetic proteins Lower limb fusion Arthrodesis

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Observation of the γ-ray emission from W43 with LHAASO

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Science china(Physics,Mechanics & Astronomy) 2025年

In this paper, we report the detection of the very-high-energy (VHE, 100 Ge V100 TeV) γ-ray emissions from the direction of the young star-forming region W43, observed by the Large High Altitude Air Shower Observation (LHAASO). The extended γ-ray source was detected with a significance of～16σby KM2A and～17σby WcDA, respectively. The angular extension of this γ-ray source is about 0.5 degrees, corresponding to a physical size of about 50pc. We discuss the origin of the γ-ray emission and possible cosmic ray acceleration in the W43 region using multi-wavelength data. Our findings suggest that W43 is likely another young star cluster capable of accelerating cosmic rays (cRs) to at least several hundred TeV.

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High efficiency gas-liquid separation system for pumped wells

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Petroleum 2019年第2期5卷 178-182页

作者： L.Enrique Ortiz-Vidal Marcel c.barbosa Oscar M.H.Rodriguez Industrial Multiphase Flow Laboratory(LEMI) Mechanical Engineering DepartmentS~ao Carlos School of EngineeringUniversity of S~ao Paulo(USP)13563-120Sao CarlosSPBrazil

Gas-liquid separation is a very common process in industrial plants,where often high Efficiency of Gas Separation(EGS)is *** the upstream oil industry,gas separation is also crucial for the proper operation of Electrical Submergible Pumps(ESP).Recent studies report the excellent performance of a gravitational separator known as Inverted-Shroud separator(IS-separator).Laboratory results indicate that this kind of separator can achieve total gas separation for a wide range of operation conditions under continuous two-phase *** original intent is to use the IS-separator for downhole gas separation in oil production ***,by account of its simple design and relatively compact size,it may be suitable for using in industrial *** this paper,we present the IS-separator in details,including geometry characteristics and *** equipment performance is also *** addition,the challenges related to the deep understanding of the gas separation process inside the IS-separator and the possible practical solutions are outlined.

关键词： separation pumped details

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clear lens extraction in angle-closure glaucoma patients

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International journal of Ophthalmology(English edition) 2013年第3期6卷 406-408页

作者： Diego T. Q. barbosa Ashleigh L. Levison Shan c. Lin Department of Ophthalmology University of California

AIM: To describe the results of 5 consecutive cases of clear lens extraction in angle closure patients for the treatment of elevated intraocular pressure (IOP). ·METHODS: Retrospective observational case series. All angle closure patients were on two or more topical glaucoma medications and had prior laser iridotomy. Eyes underwent clear lens extraction by phacoemu - lsification with intraocular lens implantation. ·RESULTS: All five patients in this case series carried the diagnosis of angle -closure glaucoma and had uncontrolled IOP prior to surgery despite topical medications. After clear lens extraction three of the cases had good IOP control (IOP cal medications. In one case the IOP was better controlled after surgery, however, topical medications were required. The desired IOP was not met in one case despite restarting maximum topical therapy. ·cONcLUSION: This case series suggests that there may be a role for therapeutic clear lens extraction in select cases of angle-closure glaucoma.

关键词： clear lens glaucoma cataract angle closure

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NEcAB family of neuronal calcium-binding proteins in health and disease

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Neural Regeneration Research 2025年第5期20卷 1236-1243页

作者： Diones Bueno Michael K.E.Schafer Sudena Wang Michael j.Schmeisser Axel Methner Institute for Molecular Medicine University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Department of Anesthesiology University Medical Center of the Johannes Gutenberg-UniversityMainzGermany Institute of Anatomy University Medical Center of the Johannes Gutenberg-UniversityMainzGermany

The N-terminal EF-hand calcium-binding proteins 1–3(NEcAB1–3) constitute a family of predominantly neuronal proteins characterized by the presence of at least one EF-hand calcium-binding domain and a functionally less well characterized c-terminal antibiotic biosynthesis monooxygenase domain. All three family members were initially discovered due to their interactions with other proteins. NEcAB1 associates with synaptotagmin-1, a critical neuronal protein involved in membrane trafficking and synaptic vesicle exocytosis. NEcAB2 interacts with predominantly striatal G-protein-coupled receptors, while NEcAB3 partners with amyloid-β A4 precursor protein-binding family A members 2 and 3, key regulators of amyloid-β production. This demonstrates the capacity of the family for interactions with various classes of proteins. NEcAB proteins exhibit distinct subcellular localizations: NEcAB1 is found in the nucleus and cytosol, NEcAB2 resides in endosomes and the plasma membrane, and NEcAB3 is present in the endoplasmic reticulum and Golgi apparatus. The antibiotic biosynthesis monooxygenase domain, an evolutionarily ancient component, is akin to atypical heme oxygenases in prokaryotes but is not wellcharacterized in vertebrates. Prokaryotic antibiotic biosynthesis monooxygenase domains typically form dimers, suggesting that calcium-mediated conformational changes in NEcAB proteins may induce antibiotic biosynthesis monooxygenase domain dimerization, potentially activating some enzymatic properties. However, the substrate for this enzymatic activity remains uncertain. Alternatively, calcium-mediated conformational changes might influence protein interactions or the subcellular localization of NEcAB proteins by controlling the availability of protein–protein interaction domains situated between the EF hands and the antibiotic biosynthesis monooxygenase domain. This review summarizes what is known about genomic organization, tissue expression, intracellular localization, interac

关键词： calcium EF hand mitochondria nervous system signal transduction

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氦气在矿物纳米孔隙中运移的分子动力学模拟

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中国科学:地球科学 2025年第1期55卷 239-254页

作者：宋丹丹关平张驰任嘉豪北京大学地球与空间科学学院北京100871

氦气在矿物纳米孔隙、孔喉中的赋存状态及流动方式对氦气的整体运移至关重要.为了阐明氦气在纳米级矿物孔隙中的运移机制,本文通过平衡分子动力学与非平衡分子动力学方法,分别模拟了氦气在石英层状纳米孔隙中的平衡自扩散和压力驱动下... 详细信息

氦气在矿物纳米孔隙、孔喉中的赋存状态及流动方式对氦气的整体运移至关重要.为了阐明氦气在纳米级矿物孔隙中的运移机制,本文通过平衡分子动力学与非平衡分子动力学方法,分别模拟了氦气在石英层状纳米孔隙中的平衡自扩散和压力驱动下的平流行为.此外,向含氦气的石英纳米孔中加入了水和氢气、甲烷、乙烷、氮气、二氧化碳等气体,以分析流动载体对氦气运移的影响.研究表明,氦气在石英孔隙壁面上的吸附量很小.在孔径小于5nm且气压低于10MPa的条件下,环境因素会显著影响氦气的扩散系数,大孔、高温和低气压的条件能促进氦的解吸附并加快其扩散.氦气以平流的形式在孔隙中运移时,流动速度与孔径大小、压力梯度和孔壁光滑程度正相关.值得注意的是,孔隙中的水和载气扩散都比氦气慢,并且他们的存在都会减少氦气的表面吸附且减弱氦气的扩散.在几种载气中,氮气的吸附性、扩散性和化学稳定性整体最接近氦气,而二氧化碳吸附能力最强、扩散最慢、与氦气差异最大.根据模拟结果,我们认为水和载气的主要作用是作为运输载体,与氦气共同运移.几种载气中,氮气的总体性质与氦气非常相似,可以有效地促进氦气的运移.而二氧化碳气体吸附性强、扩散慢,在多种气体的共同运移过程中容易损失.因此,氮气含量高而二氧化碳含量低的气藏可能具有更高的氦气含量.此外,小孔径、高气压的盖层孔隙中氦气扩散较慢,有利于氦气的保存.并且盖层孔隙中的水和载气会堵塞孔隙空间,进一步阻止了氦气的逸散.

关键词：氦气运移纳米孔隙分子动力学模拟扩散流动载体

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