检索结果-内蒙古大学图书馆

作者： Krupa, Wojciech AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Kraków30-059 Poland

The Standard Model (SM) description of the CP violation can be tested by over-constraining the angles of the Unitary Triangle. Discrepancies between precise measurements of the Cabibbo–Kobayashi–Maskawa (CKM) angle γ in the tree-level and loop-dominated processes might provide evidence of physics beyond the Standard Model. Recent results of the CKM angle γ with special attention to decays from the B → DK family and preliminary background studies for Bs0 → Ds∗K∗ decays are presented in this paper. © 2020 Jagellonian university. All rights reserved.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optically Transparent 4-Port UWB Antenna for MIMO Applications

Optically Transparent 4-Port UWB Antenna for MIMO Applicatio...

引用

Microwave and Antenna Symposium (IMAS), International

作者： Rabia Yahya Haosen Yin David Bertuch Amal El-Ghazaly Department of Physics Faculty of Science and Technology Nouakchott University Nouakchott Mauritania Department of Electrical and Computer Engineering Cornell University Ithaca NY United States

ISBN: (数字)9798350356359

ISBN: (纸本)9798350356366

Herein, we present a novel transparent antenna with ultra-wideband (UWB) performance along with polarization diversity through 4 ports allowing MIMO operation. The antenna design can be of a great interest for a vehicular applications and Internet of Things (IOT) where the dual polarization and multiple ports allows as well as medical glasses and vehicular windows where transparency is needed for visibility. The proposed antenna provides compact size with dimensions of 50 mm×50 mm, through the employment of CPW, dual orthogonal-polarization, isolation level of 20 dB, and envelope correlation coefficient (ECC) of 0.0016 as well as MIMO performance.

关键词： Microwave antennas Correlation coefficient Antenna measurements Wireless communication Glass Ultra wideband antennas Loss measurement Envelope detectors Internet of Things Antenna radiation patterns

来源：评论

学校读者我要写书评

暂无评论

One-Loop Effective Action Approach to Quantum MHV Theory

arXiv

引用

arXiv 2022年

作者： Kakkad, Hiren Kotko, Piotr Stasto, Anna AGH University Of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Krakow30-059 Poland The Pennsylvania State University Physics Department 104 Davey Lab University ParkPA16802 United States

It is well known that the MHV action, i.e. the action containing all the maximally helicity violating vertices, is alone not sufficient for loop computations. In order to develop loop contributions systematically and to ensure that there are no missing terms, we propose to formulate the quantum MHV action via one-loop effective action approach. The quadratic field fluctuations in the light cone Yang-Mills theory are explicitly integrated, followed by the classical canonical field transformation. We test the approach by calculating one loop (+ + ++) and (+ + +−) amplitudes, i.e. amplitudes that cannot be calculated from ordinary MHV action. Such an approach can be further used to unambiguously define loop corrections in other theories related to Yang-Mills theory by field transformations. Copyright © 2022, The Authors. All rights reserved.

关键词： Quantum theory

来源：评论

学校读者我要写书评

暂无评论

Extracellular vesicles produced in hollow fiber bioreactor as potential drug delivery systems – cell uptake tracking with label-free optical diffraction tomography

Research Square

引用

Research Square 2024年

作者： Wawrowicz, Kamil Durak-Kozica, Martyna Marzejon, Marcin Trusiak, Maciej Stępień, Ewa L. Department of Medical Physics M. Smoluchowski Institute of Physics Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków Poland Center for Theranostics Jagiellonian University Kraków Poland Institute of Micromechanics and Photonics Warsaw University of Technology Warsaw Poland

Extracellular vesicles (EVs) are emerging as one of the most promising candidates for novel drug delivery systems (DDS). Unique features, like biocompatibility, encapsulation capability and functionalization for precise targeting make them an attractive candidates for biomedical applications. However, despite the numerous benefits, progress in EVs-based DDS translation from bench to clinics remains highly challenging. One of key limitations that needs to be addressed are low production yield, limited reproducibility and poor understating of their natural, in vitro/in vivo behavior. To address these challenges, we aimed to establish a bioreactor-based system for long-term, high-yield EV production and evaluate their internalization capabilities using label-free tomography. Hollow fiber system was implemented as bioreactor for production and pre-purification of extracellular vesicles in long time manner. The obtained vesicles were characterized by spectral flow cytometry, tunable resistive pulse sensing (tRPR) and transmission electron microscopy (TEM). Subsequently, in order to investigate their biological functions, EVs uptake by target cells was evaluated with label-free techniques, such as Optical Diffraction Tomography (ODT) and Fourier Ptychographic Microscopy (FPM). Bioreactor enabled to performed five week long continuous production of extracellular vesicles with high homogeneity among each collected batch. This include tetraspanins expression, and more importantly, narrow size distribution with low, ~5% differences. Reconstructed tomographic images revealed that obtained extracellular vesicles can effectively internalize into the target, pancreatic, cells and were preferentially located in perinuclear area. This first stage results are highly promising for further development such approaches for high yield EVs production and its label-free in vitro tracking. © 2024, CC BY.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Bulk properties of the system in Au–Au collisions at 3 GeV and their dependence on collision centrality and particle rapidity

引用

Results in physics 2024年 64卷

作者： Waqas, M. Hassan, Belqees Alnakhlani, Ali Ajaz, M. Altalbe, Ali Ghodhbani, Refka Ismail, A. Haj School of Mathematics Physics and Optoelectronic Engineering Hubei University of Automotive Technology Department of Physics College of Science Qassim University Department of Physics Faculty of Science Ibb university Department of Physics Abdul Wali Khan University Mardan Department of Computer Science. Prince Sattam Bin Abdulaziz University Department of Computer Sciences Faculty of Computing and Information Technology Northern Border University Department of Mathematics and Science Ajman University

We analyze the transverse momentum spectra of proton (p), deuteron (d), triton (t), and helium (3He and 4He) in different centrality intervals in various rapidity slices in gold–gold (Au–Au) collisions at sNN=3 GeV.... 详细信息

We analyze the transverse momentum spectra of proton (p), deuteron (d), triton (t), and helium (³He and ⁴He) in different centrality intervals in various rapidity slices in gold–gold (Au–Au) collisions at s_NN=3 GeV. We apply the blast-wave model with Tsallis statistics (TBW) to transverse momentum spectra of the particles, which fits well the data of STAR Collaboration. The freezeout parameters such as kinetic freezeout temperature, transverse flow velocity, and kinetic freezeout volume are extracted. Our findings reveal that central collisions exhibit higher values for the kinetic freezeout temperature, transverse flow velocity, and kinetic freezeout volume (which means that the central collisions are more hot and expansive), and observed that they decrease from central to peripheral collisions, and the former two parameters decrease from backward rapidity regions to mid-rapidity. This indicates a rapid expansion of the system in central collisions and in backward rapidities. The above parameters are mass-dependent, and the former increases, while the latter two decrease for heavier particles, reflecting the multiple kinetic freezeout and volume differential freezeout scenarios. Besides, the entropy parameter (q) is extracted, and it increases from peripheral to central and from backward to mid-rapidity regions. © 2024 The Author(s)

关键词： Energy transfer Kinetic freezeout temperature Kinetic freezeout volume Light nuclei Phase transition Transverse flow velocity Transverse momentum spectra

来源：评论

学校读者我要写书评

暂无评论

Negative Thermal Expansion Coefficient Materials for Tuning High-Performance Solid Oxide Fuel Cells Via Constructing Heterostructured Cathodes

SSRN

引用

SSRN 2025年

作者： Winiarz, Piotr Lach, Jakub Ling, Yihan Zheng, Kun Faculty of Energy and Fuels AGH University of Krakow al. Mickiewicza 30 Krakow30-059 Poland School of Materials Science and Physics China University of Mining and Technology Xuzhou221116 China AGH Centre of Energy AGH University of Krakow ul. Czarnowiejska 36 Krakow30-054 Poland

The thermal mismatch between the electrode and electrolyte is one of the major drawbacks limiting the commercial application of Solid Oxide Fuel Cells. The problem could be mitigated by introducing the state-of-the-art negative thermal expansion coefficient material to electrode materials, allowing to engineer stable heterostructured electrodes. In this work, double-perovskite SmBa0.5Sr0.5CoCuO5+δ was chosen as the main electrocatalytically active component of the composite electrode. The addition of perovskite-based Sm0.85Zn0.15MnO3−δ which exhibits negative thermal expansion with increasing temperature in the SmBa0.5Sr0.5CoCuO5+δ-based composite electrode, decreases the possible degradation of the electrode. The negative thermal expansion origin of Sm0.85Zn0.15MnO3−δ was explored by HT-XRD, dilatometry and Raman spectroscopy studies. Three composite cathodes were prepared with different wt.% addition of Sm0.85Zn0.15MnO3−δ and the morphology of the most promising examined electrodes were further modified by the electrospinning technique to obtain nanofibrous composite cathodes. The polarization resistance of the heterostructured cathode was lower by almost 50% when compared to the pristine cathode. In the case of the electrospun composite cathode, the polarization resistance was lower by almost 60%, and in an anode-supported fuel cell, the peak power density at 800 °C reaches 850 mW·cm−2, which is higher by around 40%, compared with the cell with pristine cathode material. © 2025, The Authors. All rights reserved.

关键词： Perovskite

来源：评论

学校读者我要写书评

暂无评论

Evolution of phase stresses in Al/SiCp composite during thermal cycling and compression test studied using diffraction and self-consistent models

引用

Journal of Materials science & technology 2020年第1期36卷 176-189页

作者： Przemyslaw Kot Andrzej Baczmański Elzbietaa Gadalińska Sebastian Wroński Marcin Wroński Miroslaw Wróbel Gizo Bokuchava Christian Scheffzük Krzysztof Wierzbanowski AGH University of Science and Technology Faculty of Physics and Applied Computer Scienceal.Mickiewicza 3030-059 Krakow.Poland Institute of Aviation Materials&Structures Research Centeral.Krakowska 110/11402-256 WarsawPoland AGH University of Science and Technology Faculty of Metals Engineering and Industrial Computer Scienceal.Mickiewicza 3030-059 KrakowPoland Joint Institute for Nuclear Research Frank Laboratory of Neutron PhysicsJoliot-Curie 6141980 DubnaRussia Karlsruhe Institute of Technology Institute of Applied GeosciencesAdenauerring 20b76131 KarlsruheGermany

In this work,the evolutions of stresses in both phases of the Al/SiCp composite subjected to thermal cycling during in situ compression test were measured using Time of Flight neutron *** was confirmed that inter-phase stresses in the studied composite can be caused by differences in the coefficient of thermal expansion for the reinforcement and matrix,leading to a different variation of phase volumes during sample heating or *** results of the diffraction experiment during thermal cycling were well predicted by the Thermo-Mechanical Self-Consistent *** experimental study of elastic-plastic deformation was carried out in situ on a unique diffractometer EPSILON-MDS(JINR in Dubna,Russia)with nine detector banks measuring interplanar spacings simultaneously in 9 orientations of scattering *** the first time,the performed analysis of experimental data allowed to study the evolution of full stress tensor in both phases of the composite and to consider the decomposition of this tensor into deviatoric and hydrostatic *** was found that the novel Developed Thermo-Mechanical SelfConsistent model correctly predicted stress evolution during compressive loading,taking into account the relaxation of thermal origin hydrostatic *** comparison of this model with experimental data at the macroscopic level and the level of phases showed that strengthening of the Al/SiCp composite is caused by stress transfer from the plastically deformed A12124 matrix to the elastic SiCp reinforcement,while thermal stresses relaxation does not significantly affect the overall composite properties.

关键词： Stress relaxation Strengthening mechanism Plastic deformation Multiscale model Metal matrix composites Neutron diffraction

来源：评论

学校读者我要写书评

暂无评论

Impact of global monopole on heavy mesons in hot-dense medium

arXiv

引用

arXiv 2023年

作者： Abu-Shady, M. Ahmed, Faizuddin Department of Mathematics and Computer Science Faculty of Science Menoufia University Shbien El-Kom Egypt Department of Physics University of Science & Technology Meghalaya Ri-Bhoi793101 India

This research study is primarily focus on investigating how the topological effects influence the eigenvalue solutions in the presence of a hot-dense medium. To accomplish this, we employ the non-relativistic Schrödinger wave equation, taking into consideration both the quantum flux field and an interaction potential. Through this approach, we determine the energy eigenvalues and their corresponding wave functions using the Nikiforov-Uvarov method. Our findings indicate that when we consider both the topological effects and the magnetic flux, Φ, there is a noticeable reduction in the binding energy within the hot-dense medium. Additionally, we analyze the role of the baryonic potential in shaping the binding energy within the (T, ub) plane. Interestingly, it is evident that the influence of the baryonic potential becomes more pronounced as its values decrease. © 2023, CC BY.

关键词： Binding energy

来源：评论

学校读者我要写书评

暂无评论

Spin Hall Induced Magnetization Dynamics in Multiferroic Tunnel Junction

arXiv

引用

arXiv 2023年

作者： Pawlak, Jakub Skowroński, Witold Kuświk, Piotr Casanova, Félix Przybylski, Marek AGH University of Science and Technology Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 Kraków30-059 Poland AGH University of Science and Technology Academic Centre for Materials and Nanotechnology Al. Mickiewicza 30 Kraków30-059 Poland AGH University of Science and Technology Institute of Electronics Al. Mickiewicza 30 Kraków30-059 Poland CIC nanoGUNE BRTA Basque Country Donostia-San Sebastian20018 Spain Institute of Molecular Physics Polish Academy of Sciences ul. Smoluchowskiego 17 Poznań60-179 Poland

The combination of spin-orbit coupling driven effects and multiferroic tunneling properties was explored experimentally in thin Pt/Co/BTO/LSMO multilayers. The presence of a Pt heavy metal allows for the spin current-induced magnetization precession of Co upon radio-frequency charge current injection. The utilization of a BTO ferroelectric tunnel barrier separating the Co and LSMO ferromagnetic electrodes gives rise to both tunneling- magnetoresistance and electroresistance. Using the spin-orbit torque ferromagnetic resonance, the maganetization dynamics of the Co/Pt bilayers was studied at room temperature. Unexpectedly the magnetization dynamics study in the same geometry performed at low temperature reveals the existence of both Co and LSMO resonance peaks indicating efficient spin current generation both using the spin Hall effect in Pt and spin pumping in LSMO that tunnel via the BTO barrier. Copyright © 2023, The Authors. All rights reserved.

关键词： Tunnel junctions

来源：评论

学校读者我要写书评

暂无评论

ADVANCEMENTS IN THE STUDIES OF MULTI-PHOTON DECAYS OF ORTHO-POSITRONIUM WITH J-PET

Acta Physica Polonica B, Proceedings Supplement

引用

Acta Physica Polonica B, Proceedings Supplement 2024年第7期17卷

作者： Tanty, Pooja del Rio, Elena Perez Moskal, Pawel the J-PET Collaboration Poland Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland Centre for Theranostics Jagiellonian University Kraków31-501 Poland

Based on plastic scintillators, Jagiellonian PET (J-PET) is a multidiscipilinary PET scanner having a wide range of applications. With the potential of J-PET to register multiphotons, we aim at exploring the rare and forbidden decay channels of the Positronium triplet state, the ortho-Positronium (o-Ps). The o-Ps decaying into a higher number of photons than the predominant mode (o-Ps → 3γ) is six orders of magnitude smaller than expected from the Quantum Electrodynamics (QED) calculations. In this article, we intend to present the status of the preliminary studies of the multi-photon decays of ortho-Positronium. We will explain toy Monte Carlo simulations involving 4- and 5-gamma decays of the o-Ps, together with a preliminary estimation of a J-PET-like detector efficiencies for these channels. © 2024 Jagiellonian university. All rights reserved.

关键词： Photons

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：