物理最新文献

{"title":"Nonlinear optical second and third harmonic generation in InxGa1−xAs/AlyIn1−yAs double-quantum-well structures","authors":"DongFeng Liu","doi":"10.1140/epjp/s13360-025-06718-x","DOIUrl":"10.1140/epjp/s13360-025-06718-x","url":null,"abstract":"<div><p>In this paper, the second and third harmonic generation (SHG and THG) in nonlinear optics of Al_<i>x</i>In_1−<i>x</i>As/In_<i>y</i>Ga_1−<i>y</i>As double-quantum-well structures (DQWs) has been numerically studied. The energy eigenvalues and the corresponding eigenfunctions were determined using effective mass and parabolic band approximations. The nonlinear optical properties of Al_<i>x</i>In_1−<i>x</i>As/In_<i>y</i>Ga_1−<i>y</i>As DQWs are closely related to their electronic structure and external field responses. The application of an external electric field induces asymmetric distortions to the potential profile of DQWs, which may enhance the dipole matrix elements between subbands compared to single-quantum-well structures. The results reveal that the position and amplitude of the SHG and THG coefficients can be effectively altered by modifying the external electric field and the geometrical parameters. Variations in the width and indium composition of the main well of DQWs have different impacts on the SHG and THG: Narrower well width and lower indium composition enhance SHG, but weaken THG. Additionally, higher indium composition induces blueshifts in SHG and THG. These findings highlight the potential for tailoring the SHG and THG characteristics of Al_<i>x</i>In_1−<i>x</i>As/In_<i>y</i>Ga_1−<i>y</i>As DQWs by adjusting the quantum well width and applying external electric fields. Such tunability is crucial for the development of advanced optoelectronic devices with customized nonlinear optical properties.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photo-mediated biological preparation of silver nanoparticles paste in an organic solvent system: formulation and antimicrobial studies","authors":"Sajad Hajihosseini,&nbsp;Maryam Mozafar,&nbsp;Narges Torkashvand,&nbsp;Mahsa Mollapour Sisakht,&nbsp;Mohammad Hossein Yazdi,&nbsp;Sara Minaiean,&nbsp;Mohammad Ali Faramarzi,&nbsp;Nasrin Samadi,&nbsp;Ahmad Reza Shahverdi","doi":"10.1007/s00339-025-08864-6","DOIUrl":"10.1007/s00339-025-08864-6","url":null,"abstract":"<div><p>Silver nanoparticles (AgNPs) are recognized as promising nanomaterials with potent antimicrobial properties and a reduced risk of inducing resistance. In this study, we developed a semi-solid paste formulation by first preparing a thick aqueous colloid of AgNPs, intended for in situ application. Given the limitations of conventional aqueous colloids, particularly their instability during concentration via evaporation, we employed a biologically mediated method to synthesize AgNPs in organic solvent mixtures. Various additives and excipient cocktails were incorporated into the organic colloids to enhance stability and performance. All formulations were subsequently dried using conventional vacuum evaporation and re-dispersed in distilled water via ultrasonic treatment. The formulations were characterized using UV–Vis spectroscopy, and the optimal formulation was selected for further evaluation. The physicochemical and antimicrobial properties of the AgNP paste were analyzed using dynamic light scattering (DLS), field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray spectroscopy (EDS). The resulting aqueous colloid (1 mM) demonstrated excellent stability (zeta potential ~ − 37 mV) and contained nanoparticles ≤ 150 nm in size. This formulation (1mM) exhibited significant antimicrobial activity against all tested bacterial and fungal strains.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 9","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards a comprehensive study of the (^{14})N(p,(gamma ))(^{15})O astrophysical key reaction: Description of the experimental technique including novel target preparation","authors":"A. Compagnucci,&nbsp;A. Formicola,&nbsp;M. Campostrini,&nbsp;J. Cruz,&nbsp;M. Aliotta,&nbsp;C. Ananna,&nbsp;L. Barbieri,&nbsp;F. Barile,&nbsp;D. Bemmerer,&nbsp;A. Best,&nbsp;A. Boeltzig,&nbsp;C. Broggini,&nbsp;C. G. Bruno,&nbsp;A. Caciolli,&nbsp;F. Casaburo,&nbsp;F. Cavanna,&nbsp;G. F. Ciani,&nbsp;P. Colombetti,&nbsp;P. Corvisiero,&nbsp;L. Csedreki,&nbsp;T. Davinson,&nbsp;R. Depalo,&nbsp;A. Di Leva,&nbsp;Z. Elekes,&nbsp;F. Ferraro,&nbsp;Zs. Fülöp,&nbsp;A. Guglielmetti,&nbsp;C. Gustavino,&nbsp;Gy. Gyürky,&nbsp;G. Imbriani,&nbsp;M. Junker,&nbsp;M. Lugaro,&nbsp;P. Marigo,&nbsp;J. Marsh,&nbsp;E. Masha,&nbsp;R. Menegazzo,&nbsp;V. Paticchio,&nbsp;D. Piatti,&nbsp;P. Prati,&nbsp;D. Rapagnani,&nbsp;V. Rigato,&nbsp;D. Robb,&nbsp;L. Schiavulli,&nbsp;R. S. Sidhu,&nbsp;J. Skowronski,&nbsp;O. Straniero,&nbsp;T. Szücs,&nbsp;S. Turkat,&nbsp;S. Zavatarelli","doi":"10.1140/epja/s10050-025-01658-7","DOIUrl":"10.1140/epja/s10050-025-01658-7","url":null,"abstract":"<div><p>While the <span>(^{14})</span>N(p,<span>(gamma )</span>)<span>(^{15})</span>O reaction plays a key role in the hydrogen-burning processes in various stellar conditions, its reaction rate is not known with sufficient precision. Therefore, the first scientific project at the recently launched Bellotti Ion Beam Facility of the Laboratori Nazionali del Gran Sasso was the measurement of the <span>(^{14})</span>N(p,<span>(gamma )</span>)<span>(^{15})</span>O reaction cross section in the proton energy range between 250 and 1500 keV. In this paper, the experimental techniques are summarized with special emphasis on the description of solid state nitrogen target production and characterization. The first results of the reaction yield measured at 55<span>(^circ )</span> detection angle are also presented.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01658-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical calculations on energy level, transition rates and wavelengths of highly charged Au50+ and Au49+ ions","authors":"G. Q. Zhang,&nbsp;L. Y. Xie,&nbsp;W. L. He,&nbsp;Y. L. Ma,&nbsp;C. Z. Dong","doi":"10.1140/epjd/s10053-025-01045-3","DOIUrl":"10.1140/epjd/s10053-025-01045-3","url":null,"abstract":"<div><p>The energy levels, electric dipole transition rates and wavelengths of Cu-like (Au⁵⁰⁺) and Zn-like (Au⁴⁹⁺) ions were systematically calculated using the multi-configuration Dirac–Hartree–Fock method. The calculations incorporated electron correlation effects between valence-valence, core-valence, and core-core electrons. It was found that electron correlation significantly impacts the excitation energies of the Au⁵⁰⁺ and Au⁴⁹⁺ ions. In the calculation, the electron correlation configurations are expanded to <i>n</i> = 8 for the Au⁵⁰⁺ ion and <i>n</i> = 7 for the Au⁴⁹⁺ ion through single and double substitutions, resulting in good convergence for the excitation energy. Additionally, QED effects, Breit interaction, and the finite-nuclear-size effects to the excited states of Au⁵⁰⁺ and Au⁴⁹⁺ ions are also considered in the calculation. QED effects and the Breit interaction, in particular, were found to have an important influence for the excitation energy. Moreover, the calculated transition energies are in excellent agreement with experimental data, with a deviation of less than 0.078%. These results are expected to be useful for diagnosing high-temperature gold plasmas, particularly in fusion plasma applications.</p><h3>Graphical Abstract</h3><p>The calculated transition energies 4s 4p for the Au⁵⁰⁺ ion under different models and compared to experimental data.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 8","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shadows of rotating black holes in effective quantum gravity","authors":"Zhenglong Ban,&nbsp;Jiawei Chen,&nbsp;Jinsong Yang","doi":"10.1140/epjc/s10052-025-14614-y","DOIUrl":"10.1140/epjc/s10052-025-14614-y","url":null,"abstract":"<div><p>Recently, two new spherically symmetric black hole models with covariance have been proposed in effective quantum gravity. Based on these models, we use the modified Newman–Janis algorithm to generate two rotating quantum-corrected black hole solutions, characterized by three parameters, the mass <i>M</i>, the spin <i>a</i>, and the quantum parameter <span>(zeta )</span>. To understand the effects of the quantum parameter <span>(zeta )</span> on these two rotating black holes, we investigate in detail the horizons and static limit surfaces. By constraining the possible range of the parameters, we study the shadows cast by these rotating black holes. The results indicate that for both rotating BHs, the parameter <span>(zeta )</span> mainly affects the shadow size in the non-extremal case, while it deforms the shadow shape by arising a cuspy edge in the near-extremal case. Through the presence of the cuspy edge in the shadow, we further discuss how to differentiate it from the shadows of other rotating quantum-corrected black holes. Utilizing the Event Horizon Telescope shadow observational results for M87* and Sgr A*, we set the black hole inclination angles to <span>(17^{circ })</span>, <span>(50^{circ })</span>, and <span>(90^{circ })</span> and subsequently calculate the angular diameter of the black hole shadows. Our analysis indicates that in the constrained parameter space for M87* and Sgr A*, the common parameter constraints obtained from the RBH-I are <span>(0.569246M&lt; zeta &lt; 0.924954M)</span>. In contrast, the constraints from the RBH-II are <span>(0&lt; zeta &lt; 3.018M)</span>.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 8","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14614-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Double-diffusive convection in a plane layer with low thermal conductivity boundaries","authors":"Sergei Prokopev,&nbsp;Tatyana Lyubimova","doi":"10.1140/epje/s10189-025-00514-2","DOIUrl":"10.1140/epje/s10189-025-00514-2","url":null,"abstract":"<p>This study examines double-diffusive convection in a horizontal fluid layer with low thermal conductivity boundaries, where the heat flux is fixed. Using linear stability analysis and nonlinear modeling, the behavior of the system is explored under different thermal and concentration gradients. Two instability modes are identified: monotonous and oscillatory. The monotonous mode, exhibiting longwave patterns, dominates when both gradients contribute to instability. The oscillatory mode occurs when the gradients oppose each other, with stability thresholds dependent on system parameters. Nonlinear modeling confirms the linear theory, showing longwave patterns near the instability threshold and oscillatory behavior when gradients are opposed. These findings offer insights into double-diffusive convection in systems with low thermal conductivity boundaries.</p><p>Stability map on the plane Rayleigh number–solutal Rayleigh Number</p>","PeriodicalId":790,"journal":{"name":"The European Physical Journal E","volume":"48 8-9","pages":""},"PeriodicalIF":2.2,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144853560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Precision measurement of the half-lifes of the excited nuclear states in Fe-57","authors":"Benedikt Bergmann,&nbsp;Lukas Javora,&nbsp;Petr Smolyanskiy","doi":"10.1140/epja/s10050-025-01659-6","DOIUrl":"10.1140/epja/s10050-025-01659-6","url":null,"abstract":"<div><p>The half-lifes of the nuclear isomeric states in ⁵⁷Fe at 14.4 keV and 136.5 keV above the ground state are measured with unprecedented precision using hybrid pixel detectors based on Timepix3 technology. These detectors enable dead-time-free single-photon detection and provide simultaneous measurements of photon energy and arrival time, allowing for nanosecond-scale determination of time differences between characteristic X-rays and <span>(gamma )</span>-rays emitted during the electron-capture decay of ⁵⁷Co. Employing the delayed coincidence technique, the half-life of the 14.4-keV state is determined as <span>(t^{14.4 text { keV}}_{1/2} = 97.82(5))</span> ns, achieving a fourfold improvement in precision over previous measurements. The half-life of the 136.5-keV state is measured as <span>(t^{136 text { keV}}_{1/2}= 8.730(17))</span> ns, reducing the uncertainty by a factor of two. These results are discussed in the context of previous works.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01659-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic and structural properties of a silica/SrFe12O19 nanocomposite subjected to different heat-treatments","authors":"A. Lobo Guerrero,&nbsp;R. Murillo-Ortíz,&nbsp;B. N. López-Gutiérrez,&nbsp;M. F. Ramírez-Ayala,&nbsp;J. R. Martínez,&nbsp;D. Espericueta,&nbsp;G. Ortega-Zarzosa","doi":"10.1007/s00339-025-08862-8","DOIUrl":"10.1007/s00339-025-08862-8","url":null,"abstract":"<div><p>This study reports on the preparation of a silica composite containing strontium hexaferrite nanoparticles. We investigated its structural and magnetic properties, examining the influence of both the magnetic nanoparticle concentration and various heat treatment conditions. This work addresses the critical need for precise control over the structure and magnetic properties of silica-based composites with magnetic nanoparticles for biomedical applications. The magnetic nanocomposite was fabricated using strontium hexaferrite (SrFe₁₂O₁₉) nanoparticles, incorporated into the silica during the hydrolysis/condensation reaction of the sol-gel process to obtain a homogeneous mix. To understand the impact of heat treatment, we investigated the structural and magnetic properties of the nanocomposite after thermal processing through two different heating routes: using an electrical furnace and by means of microwave hybrid heating using low power microwave oven. The heat treatment was carried out at 850 and 1050 °C, while the microwave processing lasted for 20- and 30-min. Results showed high tuneability of the structural and magnetic properties. The silica matrix can range from amorphous to crystalline, whereas the magnetic properties can be adjusted from hard-magnetic to soft-magnetic. The samples processed using microwave hybrid heating show marked differences in their structural and magnetic properties compared to those obtained via conventional heating. Specifically, the sample obtained at 20 min retains the amorphous structure and induces a drop in coercive field from 2.0 to 0.28 kOe, while the squareness ratio decreased from 0.5 to 0.1. This behavior is attributed to a phase evolution of the hexaferrite nanoparticles embedded in the amorphous quartz matrix.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 9","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the laser polishing mechanism and surface quality of additively manufactured titanium alloy TC4","authors":"Liangliang Li,&nbsp;Ming Liu,&nbsp;Yao Sun,&nbsp;Jiwen Xu,&nbsp;Jinlong Li,&nbsp;Taiyue Liu,&nbsp;Tianwei He","doi":"10.1007/s00339-025-08763-w","DOIUrl":"10.1007/s00339-025-08763-w","url":null,"abstract":"<div><p>Traditional polishing methods struggle to achieve high precision smoothness on titanium alloy surfaces. In contrast, laser polishing can accomplish micron-level or even nano-level precise processing by accurately controlling parameters of the laser beam, such as energy density and spot size, which can effectively remove minute protrusions, pits, and scratches from the surface, resulting in exceptional surface flatness and smoothness, which meets the stringent surface quality requirements of components in high-end fields like aerospace and medical devices. Consequently, the surface generation mechanism and process optimization of laser polishing additively manufacturing of titanium alloys is conducted, and a numerical simulation model for laser polishing under thermo-mechanical coupling is established. Validations confirm that profile undulation heights of experimental and simulation results are generally consistent. Besides, the effect of laser processing parameters on surface roughness parameters (<i>S</i>a, <i>S</i>q, <i>S</i>sk and <i>S</i>ku), surface morphology, hardness and melt pool width for additively manufactured TC4 is disclosed, and the content of C element on the surface can be controlled below 3%, and the content of O element can be controlled around 5% under argon protective atmosphere. This study has a certain promoting effect on improving surface quality of laser polished titanium alloy, enhancing material performance, expanding application range and improving the production efficiency.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 9","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomic nonclassical correlation dynamics induced by open resonance qubit-cavity interactions: Kerr-like medium and Stark shifts effects","authors":"H. Allhibi,&nbsp;F. Aljuaydi,&nbsp;M. Mansour,&nbsp;A.-B. A. Mohamed","doi":"10.1007/s00339-025-08837-9","DOIUrl":"10.1007/s00339-025-08837-9","url":null,"abstract":"<div><p>In this study, we investigate the dynamics of local quantum uncertainty (LQU), local quantum Fisher information (LQFI), and logarithmic negativity (LN), in a qubit–cavity system operating under two-photon resonance conditions. The system comprises two two-level atoms (qubits) interacting with a quantized electromagnetic field inside a cavity filled with a nonlinear Kerr-like medium. The model incorporates intensity-dependent Stark shifts, which strongly modulate the evolution of the qubit states. Dissipative effects such as atomic spontaneous emission and cavity losses are accounted for via a Lindblad-type master equation, enabling a realistic description of the system’s open quantum dynamics. Our analysis reveals that two-photon processes can dynamically generate substantial quantum correlations even when the initial atomic state is separable. We find that, for example, with an initial Fock state of <span>(n=5)</span> photons and moderate dissipation rates (<span>(kappa = gamma = 0.05)</span>), the LQFI peaks near 0.82 at <span>(t approx 0.3pi)</span>, while entanglement–as quantified by LN–exhibits periodic revivals before decaying. The strength and persistence of these quantum resources are highly sensitive to the initial photon number, Kerr nonlinearity, and Stark shift parameters. These results offer valuable insights into optimizing nonclassical resources in nonlinear, lossy quantum optical systems, with implications for quantum metrology, communication, and control in cavity-QED architectures.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 9","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00339-025-08837-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}