Engineering reports : open access最新文献

{"title":"Thermal spray coatings for molten salt facing structural parts and enabling opportunities for thermochemical cycle electrolysis","authors":"Nadimul Haque Faisal,&nbsp;Vinooth Rajendran,&nbsp;Anil Prathuru,&nbsp;Mamdud Hossain,&nbsp;Ramkumar Muthukrishnan,&nbsp;Yakubu Balogun,&nbsp;Ketan Pancholi,&nbsp;Tanvir Hussain,&nbsp;Siddharth Lokachari,&nbsp;Bahman Amini Horri,&nbsp;Mark Bankhead","doi":"10.1002/eng2.12947","DOIUrl":"10.1002/eng2.12947","url":null,"abstract":"<p>Thermochemical water splitting stands out as the most efficient techniques to produce hydrogen through electrolysis at a high temperature, relying on a series of chemical reactions within a loop. However, achieving a durable thermochemical cycle system poses a significant challenge, particularly in manufacturing suitable coating materials for reaction vessels and pipes capable of enduring highly corrosive conditions created by high-temperature molten salts. The review summarizes thermally sprayed coatings (deposited on structural materials) that can withstand thermochemical cycle corrosive environments, geared towards nuclear thermochemical copper–chlorine (Cu<span></span>Cl) cycles. An assessment was conducted to explore material composition and selection (structure–property relations), single and multi-layer coating manufacturing, as well as corrosion environment and testing methods. The aim was to identify the critical areas for research and development in utilizing the feedstock materials and thermal spray coating techniques for applications in molten salt thermochemical applications, as well as use lessons learnt from other application areas (e.g., nuclear reaction vessels, boilers, waste incinerators, and aero engine gas-turbine) where other types of molten salt and temperature are expected. Assessment indicated that very limited sets of coating-substrate system with metallic interlayer is likely to survive high temperature corrosive environment for extended period of testing. However, within the known means and methods, as well as application of advanced thermal spray manufacturing processes could be a way forward to have sustainable coating-substrate assembly with extended lifetime. Spraying multi-layered coating (nano-structured or micro-structured powder materials) along with the application of modern suspension or solution based thermal spray techniques are considered to result in dense microstructures with improved resistance to high temperature thermochemical environment.</p>","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12947","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141342603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Blockchain for sustainable city transformation: A review on Bangladesh","authors":"Rahul Joysoyal,&nbsp;Shekh S. Uddin,&nbsp;Touhid Islam,&nbsp;Subrata K. Sarker,&nbsp;Li Li,&nbsp;Faiaz Ahsan,&nbsp;Uzair Aslam Bhatti,&nbsp;Ehsanul Islam Zafir","doi":"10.1002/eng2.12948","DOIUrl":"10.1002/eng2.12948","url":null,"abstract":"<p>Blockchain (BCn) revolution across the world leads the global transformation by altering the existing structure and introducing the accessible and decentralized paradigm. This technology facilitates access to resources and redefines conventional frameworks, empowering people and communities globally. Motivated by these attention-seeking potentiality of BCn features, in this article, we examine the challenges, advancements, and emerging prospects of the BCn revolution in Bangladesh. With a specific focus on BCn implications for sustainability and smart development, this study addresses the urgent need to understand how BCn can facilitate sustainable development in rapidly evolving countries like Bangladesh. The goal of this research is to draw attention to the successful revolution of BCn in the world and use this knowledge to extract best practices and cutting-edge strategies for sustainable transformation of Bangladesh. The contribution of this study covers the underlying concepts of the BCn technology, showing the revolutionary state of BCn across the world, applications of BCn for sustainability, assessment of its current usage, and highlighting the BCn implementation problems. Furthermore, this study serves as a gateway to a transparent, decentralized future that fosters inclusive national progress and aligns with sustainable development goals. This study also strives to inspire individuals to use this transformational technology for the collective benefit of society by highlighting BCn's potential to empower communities while driving positive change.</p>","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12948","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141358975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances of MAX phases: Synthesis, characterizations and challenges","authors":"Md. Shahinoor Alam,&nbsp;Mohammad Asaduzzaman Chowdhury,&nbsp;Md. Arefin Kowser,&nbsp;Md. Saiful Islam,&nbsp;Md. Moynul Islam,&nbsp;Tasmina Khandaker","doi":"10.1002/eng2.12911","DOIUrl":"10.1002/eng2.12911","url":null,"abstract":"<p>MAX phases and their MXene compounds have received significant attention owing to their extensive potential applications. The quality and purity of the MAX phase guarantee the desired quality of the MXene product, which is essential for a variety of applications, including energy storage, catalysis, and electrical devices. Due to the purity, quality, complex structure, and unavailable commercial pure MAX powders, it is frequently required to have sophisticated synthesis and characterization techniques for the expected MAX products. Many researchers entering this field seek a comprehensive approach to the synthesis and characterization of MAX phases. Despite this, a significant portion of existing reviews have overlooked the synthesis and characterization methods specific to MAX phases, particularly when addressing MXenes. Consequently, this review aims to offer a thorough overview of the various synthesis methods and characterization techniques that are often required for MAX phases. In this review, various synthesis techniques, including their advantages and disadvantages, have also been discussed. Characterization techniques, especially x-ray diffraction (XRD), were found to be quite critical for new researchers. However, the integration of other techniques such as scanning electron microscopy, transmission electron microscopy, x-ray photoelectron spectroscopy, and infrared analysis enhances and complements the findings obtained through XRD. The review also underscores the challenges associated with MAX phase synthesis and proposes potential solutions, emphasizing the assessment of their suitability across a broad spectrum of applications. Overall, this review serves as a comprehensive resource and guide for researchers engaged in the exploration and application of MAX phases, emphasizing the essential techniques of synthesis and characterization in harnessing their massive potential.</p>","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12911","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141367497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Special issue “Biomass-based industry: Towards a sustainable development”","authors":"Fernando Israel Gómez-Castro,&nbsp;Arturo González-Quiroga,&nbsp;Alpaslan Atmanli","doi":"10.1002/eng2.12943","DOIUrl":"10.1002/eng2.12943","url":null,"abstract":"<p>There is a growing concern about the environmental impact of the industrial and energetic sectors, which have been strongly dependent on fossil resources. Such dependence has caused an accelerated increase in the concentration of greenhouse gases in the atmosphere, contributing to global warming and the changes in worldwide weather patterns. Moreover, the continuous use of fossil sources causes a depletion in the availability of such non-renewable materials, reducing the opportunities for future generations to satisfy their basic needs. However, breaking this dependence on fossil resources is not easy since they are employed to produce a wide variety of derivatives such as fuels, chemicals, and energy, which are fundamental for the current lifestyle of a significant percentage of the world population.</p><p>Under such circumstances, biomass has been identified as a raw material with the potential to satisfy needs currently fulfilled through fossil sources. Biomass is the mass of all living beings. Thus, its composition includes carbon, as occurs with petroleum. Then, proper treatment can transform biomass into bio-based equivalents of petroleum derivatives. Moreover, biomass is renewable and widely available in different world regions. A fraction of the vegetable biomass is used as food; thus, its use for other applications is not adequate from an ethical perspective. However, another fraction is considered waste, including agricultural residues, organic municipal solid wastes, and industrial wastes. On the other hand, there are vegetable species that are not used as food sources or organisms that may generate compounds useful for society. Examples of these are the Jatropha species and the microalgal biomass. All these are examples of biomass whose composition has wide potential to obtain essential derivatives. Moreover, in the case of wastes, these are produced daily in high volumes. Their use as raw materials avoids inadequate disposal while generating valuable products, promoting the implementation of production schemes in a circular economy perspective.</p><p>Although the technologies to transform biomass into valuable products are already available, with some biorefineries currently operating in the world, there are still challenges that must be addressed. The most important one is related to economic factors. Bio-based products commonly have relatively high production costs, which are reflected in the final selling price. This may affect the implementation of a bio-based economy, mainly in countries with low incomes. Thus, research must continue to determine strategies to enhance the processes used for biomass conversion. For instance, fermentation-based processes usually have low yields and require relatively long periods to achieve their purpose. Thus, the development of modified organisms is an area of opportunity. Moreover, the purification of the products implies a high energy demand due to the highly diluted broths. Then, more effi","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12943","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pivotal role of polylactide in carbon emission reduction: A comprehensive review","authors":"Everlyn Kerubo Mosomi,&nbsp;Oludolapo Akanni Olanrewaju,&nbsp;Samson Oluropo Adeosun","doi":"10.1002/eng2.12909","DOIUrl":"10.1002/eng2.12909","url":null,"abstract":"<p>This review paper explores the diverse applications of polylactide or polylactic acid (PLA) and its contributions to environmental sustainability. It delves into the synthesis, properties, and numerous applications of PLA, accompanied by illustrative examples demonstrating its ability to reduce carbon emissions. The environmentally friendly characteristics of PLA, coupled with its versatility, make it a vital player in the ongoing efforts to combat climate change. PLA generally requires lower extrusion temperatures than other 3D printing materials, such as ABS (Acrylonitrile Butadiene Styrene). Lower extrusion temperatures lead to reduced energy consumption during the printing process thus the reduction in carbon dioxide emissions during production. Plants, such as corn and sugarcane, play a crucial role in absorbing carbon dioxide from the atmosphere during their growth cycle. When these plants are utilized to produce PLA, the captured CO₂ remains sequestered within the plastic material. This contributes to offsetting CO₂ emissions from other sources. In conclusion, the usage of PLA has demonstrated positive contributions to the reduction of carbon dioxide emissions through its renewable sourcing, lower extrusion temperatures, lower dependence on fossil fuels, reduced greenhouse gas emissions during production, biodegradability, and participation in a closed carbon cycle.</p>","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12909","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141012257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Who earns engineering degrees? Detecting longitudinal data trends with infographics","authors":"Kristin L. Schaefer,&nbsp;Jerrod A. Henderson","doi":"10.1002/eng2.12886","DOIUrl":"10.1002/eng2.12886","url":null,"abstract":"<p>Typical data available to engineering educators about the state of degrees awarded is disseminated via various groups. The most salient limitations to each of these sources are a lack of disaggregating data by multiple personal identities and an annualized reporting schedule hindering interpretations over time. This analysis ascertains how female degrees earned in engineering changed for bachelor's, master's, and doctoral degree levels from 2005 to 2021. We sought to understand trends by disaggregating ASEE records by gender, race, and engineering discipline. Data gathered from EDMS were cleaned, analyzed, and visualized, following principles for data sense making and human factors. Results highlight women gravitating towards Biological, Environmental, and Computational engineering disciplines. The total number of all degrees awarded is increasing for all genders in all disciplines, but these trends are not evenly distributed across disciplines. While it is true that the overall proportion of women in engineering wavered near 20%, this statistic does not tell the whole story of what has been occurring in engineering. By disaggregating infographics, we tracked percentage growth in certain fields as well as overall increases in number of degrees awarded at all levels of higher education. Future research is needed to determine causes for women's choices in engineering.</p>","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12886","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140725815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Active quasi circulator: Comprehensive review and performance comparison","authors":"Mehedi Hasan,&nbsp;Sujan Chowdhury,&nbsp;Hasan U. Zaman","doi":"10.1002/eng2.12898","DOIUrl":"https://doi.org/10.1002/eng2.12898","url":null,"abstract":"<p>Designing circulator as an antenna interface device becomes a daunting task, particularly active-quasi circulator. This article focuses on demonstrating the basic operation principle, design methods, technical parameters, and performance metrics of active quasi-circulator. In addition, the study provides an analogy of the circuits and structures proposed by the researchers to enhance certain performance metrics. Active signal cancellation and passive signal cancellation are identified as the major design approaches. Tunable, wideband, and wideband-tunable are the major types of circulators found in existing literature. Moreover, this article provides a performance comparison of the active-quasi circulators available in existing literature. Several active quasi-circulators were able to operate in high frequencies such as 60 GHz with acceptable isolation levels. On the other hand, several designs have over 30 dB isolation, which is a highly desired parameter. At last, the future design challenges associated with active-quasi circulators have been discussed to provide insight into future research.</p>","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12898","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of research on MnS inclusions in high-quality steel","authors":"Yan Song,&nbsp;Hainan Zhang,&nbsp;Lei Ren","doi":"10.1002/eng2.12892","DOIUrl":"https://doi.org/10.1002/eng2.12892","url":null,"abstract":"<p>MnS which has good plasticity is a non-metallic inclusion commonly found in steel. For most steel types, the size, shape, and distribution of MnS have a significant influence on the properties of steel. The large-sized MnS inclusions disrupt the continuity of the steel and cause the anisotropy in steel. The result is a decline of steel's overall performance. In contrast, the small-sized MnS inclusions which in the shape of spherical or spindle in steel can diminish the incidence of thermal embrittlement and improve the machinability of steel. The morphology of MnS in steel is mainly affected by the ingredients of steel and heat treatment manner. MnS inclusions in steel are present in spherical, polyhedral, dendritic, and irregular shapes. The precipitation behavior is mainly affected by the steel ingredients, heat treatment system, and other factors. This paper summarizes the latest research results about the factors affecting MnS inclusions and controlling measures in high-quality steel in recent years.</p>","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12892","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140642043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LocalPoly interpolation: Generalizing tricubic for Cn continuity in M-dimensional spaces","authors":"Edvin Åblad","doi":"10.1002/eng2.12888","DOIUrl":"10.1002/eng2.12888","url":null,"abstract":"<p>Tricubic interpolation, originally introduced by Lekien and Marsden (<i>Int J Numer Methods Eng</i>. 2005; 63(3): 455–471), has been a cornerstone in the field of interpolation, providing <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow>\u0000 <mi>C</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mn>1</mn>\u0000 </mrow>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$$ {C}^1 $$</annotation>\u0000 </semantics></math> continuous interpolations within three-dimensional spaces. However, real-world applications often demand higher levels of smoothness within <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>M</mi>\u0000 </mrow>\u0000 <annotation>$$ M $$</annotation>\u0000 </semantics></math>-dimensional spaces. This paper introduces LocalPoly interpolation, a novel generalization of tricubic interpolation that extends to <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow>\u0000 <mi>C</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>n</mi>\u0000 </mrow>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$$ {C}^n $$</annotation>\u0000 </semantics></math> continuity and <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>M</mi>\u0000 </mrow>\u0000 <annotation>$$ M $$</annotation>\u0000 </semantics></math> dimensions. A key property is the use of solely local data for interpolation, allowing for on-demand computation of interpolation polynomials, which is particularly advantageous in scenarios where a minor subset of the space is of interest. We rigorously prove the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow>\u0000 <mi>C</mi>\u0000 </mrow>\u0000 <mrow>\u0000 <mi>n</mi>\u0000 </mrow>\u0000 </msup>\u0000 </mrow>\u0000 <annotation>$$ {C}^n $$</annotation>\u0000 </semantics></math> continuity achieved by the LocalPoly interpolation method; the proof features a numerically exact method for computing polynomial coefficients. The enhanced continuity is of great relevance in optimization algorithms, where efficient convergence often relies on the availability of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msup>\u0000 <mrow>\u0000 <mi>C</mi>\u0000 </mrow>\u0000 ","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12888","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140371865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of SDN-enabled routing protocols for Named Data Networking","authors":"Sembati Yassine,&nbsp;Naja Najib,&nbsp;Jamali Abdellah","doi":"10.1002/eng2.12884","DOIUrl":"10.1002/eng2.12884","url":null,"abstract":"<p>Named Data Networking is a novel network architecture for the future internet in which data is named rather than addressed. This enables routers to forward data more efficiently based on its name, outperforming IP-based routing. Another networking architecture that divides the control plane and the data plane is software-defined networking (SDN). In an SDN network, the control plane decides on routing while the data plane forwards data packets. This separation increases routing flexibility and scalability. Numerous techniques to improve routing can be achieved with NDN and SDN integration. This paper provides an in-depth examination of routing approaches in NDN based on SDN, emphasizing design principles, algorithms, and performance measures. We begin by summarizing the NDN architecture and delving into its essential components. We next go into the core routing ideas in NDN and categorize and study several routing solutions based on Software Defined Networks. Finally, we highlight the need for scalable, effective, and secure routing systems that may satisfy the expanding requirements of the contemporary internet. We also suggest open research topics in NDN routing based on SDN. This review provides an extensive overview of current centralized routing approaches in NDN, including their limitations and future possibilities.</p>","PeriodicalId":72922,"journal":{"name":"Engineering reports : open access","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eng2.12884","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140224586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}