Brazilian Journal of Physics最新文献

{"title":"The Formation and Propagation of DAKdV and Time-Fractional DAKdV Solitons in a Nonthermal Dusty Plasma","authors":"M. M. Alam,&nbsp;M. S. Bhuyan,&nbsp;Umma Imon,&nbsp;M. S. Alam","doi":"10.1007/s13538-025-01823-9","DOIUrl":"10.1007/s13538-025-01823-9","url":null,"abstract":"<div><p>The propagation characteristics of dust-acoustic waves (DAWs) and the generation of Korteweg-de Vries (KdV) and time-fractional KdV (TFKdV) solitons are investigated in an unmagnetized collisionless dusty plasma. The plasma system consists of nonthermal hot electrons, nonthermal ions, and negative dust fluid. To do this, the reductive perturbation method is used to derive the KdV equation. To investigate the TFKdV soliton, the KdV equation is converted to the TFKdV equation by using the procedure of El-Wakil et al. [38]. To study the effects of pertinent parameters, the numerical analysis is performed. It is found that the propagation characteristics, such as phase velocity, nonlinearity, and production of KdV as well as TFKdV solitons, are affected by the concerned plasma parameters.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145261","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":"RF Sputtering and Annealing Effects on Cu2SnS3 Thin Films: Structural, Optical, and Electrical Properties","authors":"Mohammed Bousseta,&nbsp;Noureddine Lebrini,&nbsp;Abdelaziz Tchenka,&nbsp;Said Elmassi,&nbsp;Abdelfattah Narjis,&nbsp;Abdelkader El Kissani,&nbsp;Lahcen Nkhaili,&nbsp;Abdelkader Outzourhit","doi":"10.1007/s13538-025-01825-7","DOIUrl":"10.1007/s13538-025-01825-7","url":null,"abstract":"<div><p>This study presents a systematic investigation into the deposition of Cu₂SnS₃ (CTS) thin films via RF sputtering, aiming to optimize their structural, optical, and electrical properties for photovoltaic applications. CTS films were deposited under varying RF powers (150–300 W), and substrate temperatures were at room temperature. XRD analysis revealed a predominantly monoclinic crystal structure at an optimized annealing temperature of 500 °C and RF power of 300 W, with enhanced crystallinity and reduced secondary phases. SEM and EDS confirmed uniform, morphology, and near-stoichiometric composition under these conditions. UV–Vis-NIR spectroscopy indicated a direct optical bandgap of 1.24 eV, suitable for solar absorption. These optimized deposition parameters also minimized structural defects, improving light absorption and carrier transport. The improved electrical conductivity and interface quality suggest that CTS films produced under these conditions are strong candidates for efficient photovoltaic and optoelectronic devices.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145509","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":"Experimental Study of the Fine-Structure Mixing of Cs 62P Induced By Collisions with Different Buffer Gases","authors":"Yongbao Qiu,&nbsp;Jing Liu,&nbsp;Lin Mao,&nbsp;Abai Alghazi","doi":"10.1007/s13538-025-01826-6","DOIUrl":"10.1007/s13538-025-01826-6","url":null,"abstract":"<div><p>Fine-structure collisional transfer cross-sections for the 6²P_3/2 → 6²P_1/2 transition of caesium atoms in CH₄, C₂H₆, CH₄ + Xe, and C₂H₆ + Xe buffer gases were measured within the temperature range of 323–443 K using laser-induced fluorescence spectroscopy. The experimental results indicate that Cs(6P_J) atoms in C₂H₆ + Xe buffer gas exhibited the largest transfer cross-section in the 323–403 K temperature range. At 373 K, the fine-structure transfer cross-sections of Cs atoms in CH₄ and CH₄ + Xe gases were determined to be (11.40 ± 1.71) × 10^–15 cm² and (21.03 ± 3.15) × 10^–15 cm², respectively. Similarly, at 383 K, the fine-structure transfer cross-sections of Cs atoms in C₂H₆ and C₂H₆ + Xe gases were measured as (11.85 ± 1.78) × 10^–15 cm² and (40.33 ± 6.05) × 10^–15 cm², respectively. Charging with 24-Torr Xe gas increased the fine-structure transfer cross-sections in CH₄ and C₂H₆ gases by approximately 1.8-fold and 3.4-fold, respectively. Introducing Xe gas into CH₄ or C₂H₆ at 300 Torr within the 363–383 K temperature range markedly enhanced the D₁ and D₂ fluorescence intensities of the Cs atoms. The large collisional broadening coefficient of Xe contributed to improving the absorption efficiency of Cs atoms towards pump light. The experimental results presented in this study provide robust data support for enhancing the output performance of Cs-DPAL lasers under buffer gas pressures up to 500 Torr and enable effective validation of the relevant theoretical models.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167102","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":"A High Sensitivity Terahertz Biosensor with Hybrid Metasurfaces for Tuberculosis Detection Leveraging the Integration of Machine Learning and Multi-Material Resonators","authors":"Amuthakkannan Rajakannu,&nbsp;Jacob Wekalao,&nbsp;Hussein A. Elsayed,&nbsp;Ahmed M. El-Sherbeeny,&nbsp;Mostafa R. Abukhadra,&nbsp;Ali Hajjiah,&nbsp;Nassir Saad Alarifi,&nbsp;Ahmed Mehaney","doi":"10.1007/s13538-025-01811-z","DOIUrl":"10.1007/s13538-025-01811-z","url":null,"abstract":"<div><p>This study presents a terahertz-based biosensor for tuberculosis detection, incorporating a unique metasurfaces configuration. The sensor’s architecture features multiple resonating elements: a silver-based circular ring resonator, a black phosphorus square ring structure, a graphene platform, and symmetrically positioned gold rectangular resonators. Finite element method analysis through COMSOL Multiphysics was employed for modelling and optimization. The sensor demonstrates an exceptional sensitivity of 1000 GHzRIU⁻¹ and a detection limit of 0.310 RIU. In addition, the designed sensor maintains a high-quality factor of 8.176 and exhibits stable performance across its operational frequency range (0.1–1.4 THz). Moreover, the performance analysis under varying conditions showed consistent transmission patterns and frequency-dependent characteristics, with the graphene chemical potential that could be significantly influencing the sensor’s response. Furthermore, the integration of polynomial regression-based machine learning optimization yielded remarkably accurate predictions (<i>R</i>² &gt; 0.97) across various operational parameters. Therefore, the investigated numerical findings and machine learning optimization prove that this sensor represents a significant advancement in tuberculosis detection technology, offering improved sensitivity and reliability compared to conventional methods, whilst maintaining fabrication feasibility through standard cleanroom processes.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165866","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":"Laser Diode to Single-Mode Circular Core Dispersion Compensation Fiber Coupling with Cylindrical Microlens on the Fiber Tip: Influence of Misalignment on Coupling Efficiency","authors":"Bishnupriya Lahiri,&nbsp;Vijay Kumar Baliyan,&nbsp;Bishuddhananda Das,&nbsp;Angshuman Majumdar","doi":"10.1007/s13538-025-01817-7","DOIUrl":"10.1007/s13538-025-01817-7","url":null,"abstract":"<div><p>This paper reports a theoretical investigation of a coupler involving a laser diode (LD) and a mono-mode circular core dispersion-shifted (DS) and dispersion-flattened (DF) fibers with a cylindrical microlens (CML) on its tip. The study takes into account potential angular and transverse mismatches. The research focuses on analyzing coupling efficiencies considering specific types of misalignments by employing a relevant ABCD refraction matrix for the CML in the vertical plane, as the horizontal plane coupling performance is deemed poor. The analysis uses Gaussian field distribution based on two common wavelengths, 1.3 µm and 1.5 µm. The formulations presented require relatively low computation effort. The study highlights the degree of sensitivity of the coupler's performance when the mentioned types of offsets are present. The outcomes of the research are expected to be valuable for manufacturers who are involved in the development of devices incorporating CMLs, particularly in the fields of lasers and fibers.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165829","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":"Revealing the Multifunctional Properties of Zn-Al Layered Double Hydroxides Intercalated with Halide Ions (Cl−, Br−, I−): Textural, Electrical, Dielectric, and Optical Properties","authors":"Youssef Messak,&nbsp;Khadija Ben Zarouala,&nbsp;Othmane Rhalmi,&nbsp;Redouane Lahkale,&nbsp;Khadija Chouni,&nbsp;Wafaa El Kasiti,&nbsp;Elmouloudi Sabbar","doi":"10.1007/s13538-025-01816-8","DOIUrl":"10.1007/s13538-025-01816-8","url":null,"abstract":"<div><p>Herein, three phases of halide ions (chloride, bromide, and iodide) intercalated in zinc-aluminum layered double hydroxides (LDH) were synthesized by co-precipitation method at constant pH with Zn/Al = 2 (molar ratio) and characterized by X-ray diffraction, Raman spectroscopy, thermal gravimetric analysis, SEM/EDX, BET analysis, laser particle size distribution analysis, impedance spectroscopy, and diffuse reflectance spectroscopy. It was found that with increasing halide size from chloride to iodide, the interlayer distance (d₀₀₃) of the cell increased, while the inter-metallic distance (d₁₁₀) remains almost constant, confirmed by the characteristic Raman bands. However, the thermal stability of the halide intercalated LDH decreased in the order of bromide–iodide–chloride, while the BET surface area increased with increasing halide size confirmed by the opposite evolution of the particle size distribution. In addition, the electrical conductivity increased at medium frequencies and decreased at high frequencies with increasing halid size, while the bromide intercalated LDH showed an increase in the dielectric constant values at low and high frequencies. Furthermore, all the LDH phases showed an improvement in the dielectric properties by reducing the dielectric loss tangent values up to 0.01 at 1 MHz. In terms of optical properties, the chloride- and iodide-containing LDH exhibited high reflectance percentages up to 93% in the Vis–NIR region and enhanced absorption coefficients in the UV light resulting in a wide band gap energy of 5.95 eV for the chloride and two ones of 5.44 and 4.76 eV for the iodide, while the bromide-containing LDH showed an enhancement of the Vis–NIR absorption leading to gap energies of 2.49 and 1.27 eV, respectively. The findings of this study indicate that in the Vis–NIR region, the chloride- and iodid-containing LDH have potential applications in the development of innovative dielectric reflective materials as well the bromide-containing LDH as an efficient dielectric absorbing material.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165828","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":"Analytical Assessment of the Total Loss in Tubular Hollow-Core Fibers Considering Their Fabrication Process","authors":"Duanny Silva Onório,&nbsp;Flavio A. M. Marques,&nbsp;Alexandre A. C. Cotta,&nbsp;Jefferson E. Tsuchida,&nbsp;Alexandre Bessa dos Santos,&nbsp;Jonas H. Osório","doi":"10.1007/s13538-025-01820-y","DOIUrl":"10.1007/s13538-025-01820-y","url":null,"abstract":"<div><p>Hollow-core photonic crystal fibers (HCPCFs) have become a key enabling technology for addressing a broad spectrum of fundamental and applied needs. Indeed, recent advancements achieved by the HCPCF research community have led to significant progress, establishing these fibers as the lowest-loss optical fibers currently available for use in the visible and ultraviolet ranges. However, the fabrication process of HCPCFs demands costly infrastructure, and achieving ultralow-loss fibers remains a complex technical challenge as numerous fabrication attempts are typically required to optimize their performances. Therefore, predicting these fibers’ performances before experimental fabrication is highly desirable. In this work, the total loss in tubular-lattice HCPCFs during their fabrication process is analytically assessed. By considering the variation in the microstructure’s geometrical parameters during fabrication and the different sources of loss, the expected loss levels are estimated and the conditions for loss minimization are identified. Thus, this research provides valuable insights into the fabrication process of hollow-core fibers, offering a predictive approach to evaluate the fibers’ performance before their experimental realization. By determining optimal conditions considering geometry, fabrication constraints, and loss figures, this work contributes to the ongoing efforts to further reduce the loss levels in HCPCFs.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165488","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":"Simulation and Characterization of Novel Right Scalene Wearable Bowtie Jean Textile Antenna for Wireless Medical Communications","authors":"G. Shyni,&nbsp;C. Mythili,&nbsp;Anitha V. R,&nbsp;C. Muthu Ramya","doi":"10.1007/s13538-025-01805-x","DOIUrl":"10.1007/s13538-025-01805-x","url":null,"abstract":"<div><p>A novel Bowtie Scalene Jean Antenna is designed for industrial, scientific, and medical (ISM) band wireless communications. It has a right scalene triangular bowtie configuration, which enhances wideband performance and efficient radiation characteristics. The antenna is fabricated using denim jeans fabric, which serves as a flexible and durable substrate with a relative permittivity (ε_r = 1.7), making it an ideal choice for wearable applications. The novelty of the proposed work is that the antenna has a simple structure, which is much easier to fabricate on a cloth surface. Initially four antennas are designed to operate in four frequencies:1.8 GHz, 1.9 GHz, 2.3 GHz, and 2.4 GHz to analyse the performance. For simulation purposes, the proposed antennas were designed using CST Microwave Studio software, and parameters like S₁₁, voltage standing wave ratio, gain, efficiency, and impedance matching are presented. At 1.8 GHz (1.041) and 2.4 GHz (1.040), the VSWR is the lowest, ensuring optimal power transfer. The better return loss is observed at 2.4 GHz (-34.004 dB), which is the best impedance matching at this frequency, followed closely by 1.8 GHz (-33.871 dB). The gain is relatively high (~ 4 dB and 4.1 dB, respectively) at 1.8 GHz and 2.4 GHz, ensuring strong directional radiation. The impedance at 2.4 GHz (50.129 Ω) is ideal for ISM band operations and is essential for wireless biomedical devices like health monitoring and telemedicine.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164610","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":"Quantum-Engineered LiXO₂ (X = Co, Ni) Delafossites: First-Principles Design of Structural, Optoelectronic, Thermodynamic, and Magnetic Frameworks for Next-Generation Energy Harvesting","authors":"Zeesham Abbas,&nbsp;Samah Al-Qaisi,&nbsp;Afaf Khadr Alqorashi,&nbsp;Khalida Bibi,&nbsp;Mohd Taukeer Khan,&nbsp;Amna Parveen","doi":"10.1007/s13538-025-01815-9","DOIUrl":"10.1007/s13538-025-01815-9","url":null,"abstract":"<div><p>The structural, optoelectronic, and magnetic properties of LiXO₂ (<i>X</i> = Co, Ni) delafossite compounds are evaluated using first-principles based <i>DFT</i> calculations to investigate their potential applications in optoelectronic and spintronic devices. Based on calculated ground state energies, LiNiO₂ is a more stable compound, compared to LiCoO₂. The indirect energy band gap for LiCoO₂ and LiNiO₂ are 4.95 and 5.02 eV, respectively, in spin (↑) direction. However, in spin (↓) direction, the values of energy band gaps are 2.05 and 1.82 eV for LiCoO₂ and LiNiO₂, respectively. The total magnetic moment <span>({m}_{tot})</span> values for LiCoO₂ are higher, compared to LiNiO₂. Unfilled d-orbitals (Co <span>(-{3d}^{7})</span> and Ni <span>(-{3d}^{8})</span>) in transition metals are responsible for highest portion of <span>({m}_{tot})</span>. Based on <span>(n(omega ))</span> values of LiXO₂ (<i>X</i> = Co, Ni) delafossite compounds, we can infer that these compounds are optically active materials, as their values are between 1.0 and 2.0. The <span>({varepsilon }_{2}(omega ))</span> spectra demonstrate that LiXO₂ (<i>X</i> = Co, Ni) compounds are auspicious entrants for solar cell appliances working in visible and UV regions. It can be inferred from the computed results that these crystalline materials are promising candidates for prospective photovoltaic appliances.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164166","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":"Two—Dimensional Materials as Antioxidants and Sunscreen Agents in Cosmetics","authors":"Xuexue Pan,&nbsp;Rongfei Yu,&nbsp;Jingyi Wu,&nbsp;Jianrong Liang,&nbsp;Weiyuan Huang,&nbsp;Rongyue Huang,&nbsp;Wenkai Li,&nbsp;Yuanlin Xie,&nbsp;Yi Zhao,&nbsp;Yawei Huang,&nbsp;Jiayi Wu,&nbsp;Jinjie Xie,&nbsp;Zhimin Chen,&nbsp;Lu Zhang,&nbsp;Meiyu Wu,&nbsp;Yonggan Fang,&nbsp;Rong Hu,&nbsp;Jianhui Zhang","doi":"10.1007/s13538-025-01813-x","DOIUrl":"10.1007/s13538-025-01813-x","url":null,"abstract":"<div><p>Two-dimensional (2D) materials such as graphene, MoS₂, and MXene are gradually emerging in cosmetics due to their unique physical and chemical properties and rich surface functional groups. This article reviews the potential applications of these materials as antioxidants and sunscreens in cosmetics. Firstly, 2D materials' high surface area, conductivity, and thermal stability make them excellent in free radical scavenging and electron transfer, making them effective antioxidants. Secondly, their UV absorption ability enables them to effectively replace traditional sunscreens and provide a broader spectrum of UV protection. In addition, this article also explores the chemical stability and biocompatibility of 2D materials in cosmetics, emphasizing their processing techniques in formula design. Although there are still challenges in large-scale production and cost control, the exploration and functional development of new 2D materials provide broad prospects for future research and applications. Therefore, the application potential of 2D materials in cosmetics is enormous and deserves further in-depth research.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 4","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13538-025-01813-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}