bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of wideband AMC integrated monopole antenna with enhanced radiation performances for off‐body systems
Authors: Hazarika Bidisha , Basu Banani , Nandi Arnab 
Published: December 2020

AbstractA low‐profile, wideband, high gain artificial magnetic conductor (AMC) integrated monopole antenna is proposed in the letter. The bowl‐shaped stair styled monopole with defected round type partial ground is integrated with the AMC containing 2 × 2 unit‐cells to broaden the impedance bandwidth by 92.7%/66.2%/53.9% at the three resonating notches at 6/8.4/10.3 GHz respectively. The AMC has covered ±90° reflection phase bandwidth from 6.20 to 7.44 GHz (18.56%). The planar AMC proffers mu‐negative (MNG) properties and polarization independent behavior. Introduction of AMC beneath the monopole achieves wideband from 5.39 to 10.95 GHz. The AMC integrated monopole provides peak gain up to 10.6 dB which is 66.8% better than that of the only monopole. The integrated antenna offers low‐profile features with unidirectional radiation behavior, up to 18.6 dB front to back ratio (FBR) and >90% efficiency. The proposed design reduces 1‐g averaged Specific Absorption Rate (SAR) at 1 mm distance up to 96.6% at the respective bands.
Recent progress in solid‐state nuclear magnetic resonance of half‐integer spin low‐γ quadrupolar nuclei applied to inorganic materials
Authors: Smith Mark E. 
Published: December 2020

AbstractAn overview is presented of recent progress in the solid‐state nuclear magnetic resonance (NMR) observation of low‐γ nuclei, with a focus on applications to inorganic materials. The technological and methodological advances in the last 20 years, which have underpinned the increased accessibility of low‐γ nuclei for study by solid‐state NMR techniques, are summarised, including improvements in hardware, pulse sequences and associated computational methods (e.g., first principles calculations and spectral simulation). Some of the key initial observations from inorganic materials of these nuclei are highlighted along with some recent (most within the last 10 years) illustrations of their application to such materials. A summary of other recent reviews of the study of low‐γ nuclei by solid‐state NMR is provided so that a comprehensive understanding of what has been achieved to date is available.
Development of a LC–HRMS based approach to boost structural annotation of isomeric citrus flavanones
Authors: He Ying‐Jie , Zhou Ying , Qin Yan , Zhou Zhong‐Shun , Zhu Meng , Zhu Yan‐Yan , Wang Zhao‐Jie , Xie Tian‐Zhen , Zhao Li‐Xing , Luo Xiao‐Dong 
Published: December 2020

AbstractIntroductionThe structural annotation of target relies on high‐resolution mass spectrometry (HRMS) information resulting in dubious identities in most cases. The accurate annotation of isomeric structures is still challenging to be confirmed with significant bottleneck.ObjectiveThis study focused on the improvement of structural annotation of candidate structures via four pairs of isomeric flavanone‐7‐O‐diglucosides and their basic flavanone aglycones commonly detected in citrus products.MethodAn integrated liquid chromatography coupled with high‐resolution mass spectrometry (LC–HRMS) approach merging retention time, accurate mass, tandem mass spectrometry (MS/MS) information (diagnostic ions), ion ratio at selected collision energy was established successfully.ResultsFeasibility of this approach was validated confidently in biological samples with relative standard deviation (RSD) of ion ratio range from 3.91 to 12.28%. Differences of fragmentation patterns of citrus flavanones were illustrated reasonably. MS/MS fragments of (S)‐hesperetin and (S)‐isosakuranetin were complicated and showed typical radical ion [1,2A – H]•– (m/z 164) in negative ESI mode due to the methoxyl group on B‐ring, which showed huge difference with (R)‐hesperetin and (R)‐isosakuranetin.ConclusionThis study integrated multiple levels to boost the confidence of structural annotation relied on LC–HRMS, and provided important values in practice for precise identification of citrus flavanones in biological matrices.
A social perennial vision: Transdisciplinary inquiry for the future of diverse, perennial grain agriculture
Authors: Streit Krug Aubrey , Tesdell Omar Imseeh 
Published: December 2020

Societal Impact StatementPlant scientists around the planet are working to develop new perennial grains and learn how to grow them in diverse agroecosystems. Perennial grain agriculture could accomplish long‐term sustainability by providing food for humans without degrading the ecosystem processes on which food productivity depends. However, more research is needed to understand how to pursue perennial grain food system transformation that builds justice within diverse human societies. We use a case study from Palestine to explore why this research should encompass many academic disciplines and go beyond them to engage communities. By paying attention to deeper agricultural systems of relationship that shape change, researchers may better develop and integrate the knowledge necessary to help realize a “social perennial vision.”SummaryResearch across plant science domains is foundational to the development of novel grain agroecosystems that feature perenniality and diversity. Because agriculture is social as well as biophysical, research is also needed to address how to make just and fair human community arrangements and socioeconomic relationships within diverse, perennial grain agroecosystems.As a first step, we draw on agroecology as well as critical concepts from the social sciences and humanities in order to identify dominant systems of relationship in agriculture, recognize their past and present impacts in the ecosphere, and envision alternatives. To ground our analysis, we use a case study of a research group in Palestine that engages communities in co‐producing plant knowledge.Our social perennial vision recognizes the effort required by human communities to find ways to endure in agricultural landscapes. Alternative systems of relationship are both necessary and possible to build diverse, perennial grain agroecosystems. The scientific and social knowledge required for positive agricultural transformation may be gained through more integrated research efforts.The social perennial vision that we characterize affirms the importance of transdisciplinary inquiry for the development of diverse, perennial grain agriculture. We highlight the ethical and practical values of participatory approaches and accessible tools for future research.
Dressing‐Shaped Rabi Oscillation of Photon Pairs in Hot Atomic Ensemble
Authors: Li Kangkang , Li Sifan , Li Changbiao , Cai Yin , Li Feng , Zhang Yanpeng 
Published: December 2020

AbstractThe nonclassical states of light serve as potential candidates for emerging quantum information processes. A quantum information unit with higher information capacity is interesting and useful in large quantum information systems, such as quantum computations. The most mature way to increase information capacity is to employ a post‐selection or cascaded method with the biphoton state and polarizing beam splitters to increase the qubits of the entangled state. Another promising processing is shaping the temporal correlations of entangled state to high‐dimensional entangled states to increase the superposed states of each qubit. Based on the photon pair state in a hot atomic ensemble, experiments are conducted to shape its temporal correlations to multi‐periodic Rabi oscillations and nonlinear phase shifts. By employing the external dressing field to quantum transitions, the nonlinear interaction produces multiple frequency modes, shaping the temporal correlation of photon pairs to multi‐periodic Rabi oscillation and proposing a 3D energy–time‐entangled qubit for photon pair state. Interestingly, the maximum peak of the periodic Rabi oscillation can migrate with a longer correlation time because of a nonlinear phase shift. Wave shaping of the photon pair state, therefore, has the potential for applications in quantum information processes with higher information capacity and quantum memory.
Satellite integration into 5G: Accent on testbed implementation and demonstration results for 5G Aero platform backhauling use case
Authors: Goratti Leonardo , Herle Supreeth , Betz Tobias , Temprado Garriga Elisenda , Khalili Hamzeh , Khodashenas Pouria Sayyad , Brunel Alain‐Pierre , Chau Duy‐Kha , Ravuri Srikant , Vasudevamurthy Ramesh , Gal Avi , Dodge Menachem , Liolis Konstantinos 
Published: December 2020

SummaryThe first true multitechnology communication system is 5G, which is expected to have a large impact on society and industry. The European Commission funded H2020 5G‐PPP Phase 2 project SaT5G addressed the plug‐and‐play integration of satellite communication into 5G. One of the SaT5G use cases corresponds to the delivery of 5G connectivity services to moving platforms such as aircraft via GEO/MEO satellite backhauling. With focus on this use case, this paper elaborates on the practical implementation and measurement results obtained within the 5G Aero testbed developed as part of the SaT5G project. The 5G Aero testbed activities focus on the next generation of connectivity and content distribution services to airplanes through satellite and terrestrial integration in 5G at the user, control and management planes. Software‐defined networking (SDN) and network functions virtualisation (NFV) are key enablers to develop a powerful end‐to‐end testbed that can accelerate the adoption of multi‐access edge computing (MEC) for the next‐generation in‐flight entertainment and connectivity (IFEC) services, which use geostationary (GEO) and medium Earth orbit (MEO) satellite backhauling technologies. Hence, measurement results obtained from both over‐the‐air demonstration over the O3b MEO satellite constellation and in‐lab validation over an emulated GEO satellite link are presented, towards the next‐generation 5G‐enabled IFEC services.
In Situ Inkjet Printing Patterned Lead Halide Perovskite Quantum Dot Color Conversion Films by Using Cheap and Eco‐Friendly Aqueous Inks
Authors: Shi Shuchen , Bai Wenhao , Xuan Tongtong , Zhou Tianliang , Dong Guoyan , Xie Rong‐Jun 
Published: December 2020

AbstractInkjet‐printed perovskite quantum dot (PQD) color conversion films (CCFs) have great potentials for mini/micro‐LED displays because of their ultrahigh color purity, tunable emissions, high efficiency, and high‐resolution. However, current PQD inks mainly use expensive, toxic, and flammable organic substances as solvents. In this work, water is proposed to be used as the solvent for inkjet printing PQD/polymer CCFs. The green‐emitting patterned MAPbBr3/polyvinyl alcohol (PVA) films are in situ prepared by using halides and the PVA‐based aqueous ink. The as‐printed CCFs exhibit a high‐resolution dot matrix of 90 µm with a bright green emission (λem = 526 nm), a high photoluminescence quantum yield of 85%, and a narrow full width at half maximum of 22 nm. They have both air‐ and photo‐stabilities under ambient conditions, and each pixel of CCFs is relatively uniform in morphology and fluorescence when the substrate temperature is 80 °C. The patterned blue‐emitting MAPbClxBr3‐x/PVA and red‐emitting Cs0.3MA0.7PbBrxI3‐x/PVA can also be printed by aqueous inks. These results indicate that the designed aqueous inks are promising for in situ inkjet printing high resolution and reliability PQD CCFs for mini/micro‐LED displays.
Instandsetzung eines Fähranlegers nach Schiffsanprall
Authors: Fechner Max , Wingeß Olaf 
Published: December 2020

AbstractDurch einen Schiffsanprall am Anleger 6a des Skandinavienkais in Lübeck‐Travemünde wurde die Hauptdeckbrücke schwer beschädigt. Infolge der Wucht des Anpralls wurden Frontquerträger, Hubquerträger und Lagerverbindungen teils stark deformiert und waren anschließend nicht mehr voll trag‐ und funktionsfähig. Über Nachrechnungen und die Integration der aufgetretenen Schadensbilder in das Berechnungsmodell konnten die Auswirkungen auf die Gesamttragfähigkeit analysiert werden. Neben der Wiederherstellung des Urzustands lag das Hauptaugenmerk auf der Verstärkung der durch Beulverformungen beeinträchtigten Stegbleche des Hubquerträgers. Nach einer Zeit mit eingeschränkter Nutzung konnte durch die Instandsetzungsmaßnahmen die vollständige Betriebsfähigkeit wieder gewährleistet werden.
Kirenol inhibited the cell survival and induced apoptosis in human thyroid cancer cells by altering PI3K/AKT and MAP kinase signaling pathways
Authors: Wang Yulong , Xu Jia , Alarifi Saud , Wang Huanjun 
Published: December 2020

AbstractThe thyroid cancer, especially papillary thyroid cancers are very common among population with high intake of iodine or iodine uptake. Even though several treatment options are available, there is still complication and side effects are still persistent. The role of signaling molecules in cancer signaling is very vast and their significance in progression of disease was increasing which leads to mortality of the patient. The major key players are PI3K, AKT and MAP kinase, involves in cell survival, proliferation, and inhibition of apoptosis and are the promising candidate for cancer treatment target, several researchers focuses these molecule to treat various acute and chronic diseases like cancer. On the other side, various literatures propose that natural compounds derived from plant source are shown potent anticancer property against several cancers. In our study we are looking in to one such active principle obtained from plant source, a diterpenoid compound kirenol, and its role thyroid cancer. Here, we report that kirenol role on various cellular mechanisms like induction of apoptosis, enhancing ROS indirectly by inhibiting antioxidants, altering the signaling mechanism of cell survival and apoptosis. Our study proposes that kirenol involved in the cancer cell cytotoxicity by inducing apoptosis and inhibition of cancer cell survival. Thus, targeting this signaling molecule with kirenol definitely favors and may lead to a therapeutic modality for thyroid cancer.
Study of meat quality and flavour in different cuts of Duroc‐Bamei binary hybrid pigs
Authors: Chen Guoshun , Cai Yu , Su Yingyu , Wang Dong , Pan Xiaolong , Zhi Xijun 
Published: December 2020

AbstractBackgroundMeat quality and flavour are important criteria for judging fresh pork and processed products. However, there have been few studies on meat quality and volatile flavour substances of different parts of binary hybrid pigs.ObjectiveTo study the differences in meat quality and volatile flavour substances between different cuts of pork, which could provide the basis for consumer decision‐making when purchasing pork.MethodsTwenty Du‐Ba binary hybrid pigs (first filial [F1] generation) bred from Duroc and Bamei pigs were used. This study systematically compared and analysed the basic nutritional components, amino acid composition, fatty acid composition and flavour profiles of longissimus dorsi, rib muscle and tendon meat of four Du‐Ba binary hybrid pigs; all assays were repeated in triplicate.ResultsCrude protein, calcium and phosphorus content in tendon meat were higher than that in the longissimus dorsi. The intramuscular fat content of the rib muscle was higher than that in the longissimus dorsi and tendon meat (p < 0.05). The amino acid content was highest in the tendon meat. The levels of essential amino acids and flavour‐associated amino acids per kilogram of longissimus dorsi were higher than those in the rib muscle and tendon meat. Moreover, the content of aspartic acid, serine and cystine were higher in the longissimus dorsi than in the other two parts. The type of saturated fatty acids and the type and content of unsaturated fatty acids in tendon meat were higher than in the longissimus dorsi and rib muscle. The total content of volatile flavour compounds was higher in the longissimus dorsi than in the rib muscle and tendon meat.ConclusionThe rib muscle contains high deposits of fat, and tendon meat has a relatively high nutritional value, while the longissimus dorsi has a stronger flavour.
Large eddy simulations of wind turbine wakes in typical complex topographies
Authors: Liu Zhenqing , Lu Shengyu , Ishihara Takeshi 
Published: December 2020

AbstractThere is a need to clarify the coupling characteristics of terrain‐induced wind fields and wind turbine‐induced wake in wind farm micrositing. However, research investigating the effect of hill shape on this interaction is lacking. In addition, during the optimization of the layout of the turbines over topographies, the flow behind the turbines should be predicted in a fast way. After obtaining the wake flow of the turbine mounted on flat terrain and the flow over the topographies, there are mainly two superposition methods to predict the turbine wake flow over the topographies. One is to add the wind deficit following the location with a vertical distance of the hub height (D‐line). The other is to add the wind deficit following the streamline starting from the turbine center (B‐line). It remains unknown to what extent these two superposition methods can be adopted. Therefore, the effects of hill shape, wind turbine size, and turbine location are investigated. When the wind deficit, obtained from modeling the wake flow of the turbine mounted on flat terrain, is superposed following B‐line, the results are overall better than those when following D‐line.
Stochastic Variational Formulations of Fluid Wave–Current Interaction
Authors: Holm Darryl D. 
Published: December 2020

AbstractWe are modelling multiscale, multi-physics uncertainty in wave–current interaction (WCI). To model uncertainty in WCI, we introduce stochasticity into the wave dynamics of two classic models of WCI, namely the generalised Lagrangian mean (GLM) model and the Craik–Leibovich (CL) model. The key idea for the GLM approach is the separation of the Lagrangian (fluid) and Eulerian (wave) degrees of freedom in Hamilton’s principle. This is done by coupling an Euler–Poincaréreduced Lagrangianfor the current flow and aphase-space Lagrangianfor the wave field. WCI in the GLM model involves the nonlinear Doppler shift in frequency of the Hamiltonian wave subsystem, which arises because the waves propagate in the frame of motion of the Lagrangian-mean velocity of the current. In contrast, WCI in the CL model arises because the fluid velocity is defined relative to the frame of motion of the Stokes mean drift velocity, which is usually taken to be prescribed, time independent and driven externally. We compare the GLM and CL theories by placing them both into the general framework of a stochastic Hamilton’s principle for a 3D Euler–Boussinesq (EB) fluid in a rotating frame. In other examples, we also apply the GLM and CL methods to add wave physics and stochasticity to the familiar 1D and 2D shallow water flow models. The differences in the types of stochasticity which arise for GLM and CL models can be seen by comparing the Kelvin circulation theorems for the two models. The GLM model acquires stochasticity in its Lagrangian transport velocity for the currents and also in its group velocity for the waves. However, the CL model is based on defining the Eulerian velocity in the integrand of the Kelvin circulation relative to the Stokes drift velocity induced by waves driven externally. Thus, the Kelvin theorem for the stochastic CL model can accept stochasticity in its both its integrand and in the Lagrangian transport velocity of its circulation loop. In an “Appendix”, we also discuss dynamical systems analogues of WCI.
The Effect of Iron Impurities on Transition Metal Catalysts for the Oxygen Evolution Reaction in Alkaline Environment: Activity Mediators or Active Sites?
Authors: Spanos Ioannis , Masa Justus , Zeradjanin Aleksandar , Schlögl Robert 
Published: December 2020

AbstractThere is an ongoing debate on elucidating the actual role of Fe impurities in alkaline water electrolysis, acting either as reactivity mediators or as co-catalysts through synergistic interaction with the main catalyst material. This perspective summarizes the most prominent oxygen evolution reaction (OER) mechanisms mostly for Ni-based oxides as model transition metal catalysts and highlights the effect of Fe incorporation on the catalyst surface in the form of impurities originating from the electrolyte or co-precipitated in the catalyst lattice, in modulating the OER reaction kinetics, mechanism and stability.Graphic Abstract
On the Reconstruction of the Center of a Projection by Distances and Incidence Relations
Authors: Pongrácz András , Vincze Csaba 
Published: December 2020

AbstractUp to an orientation-preserving symmetry, photographic images are produced by a central projection of a restricted area in the space into the image plane. To obtain reliable information about physical objects and the environment through the process of recording is the basic problem of photogrammetry. We present a reconstruction process based on distances from the center of projection and incidence relations among the points to be projected. For any triplet of collinear points in the space, we construct a surface of revolution containing the center of the projection. It is a generalized conic that can be represented as an algebraic surface. The rotational symmetry allows us to restrict the investigations to the defining polynomial of the profile curve in the image plane. An equivalent condition for the boundedness is given in terms of the input parameters, and it is shown that the defining polynomial of the profile curve is irreducible.
CHALLENGES OF THE FARS NEOLITHIC CHRONOLOGY: AN APPRAISAL
Authors: Khanipour Morteza , Niknami Kamalaldin , Abe Masashi 
Published: December 2020

ABSTRACTOver the past few decades, several excavations that have been performed in the Fars Neolithic sites have resulted in the presentation of different chronologies for the region. Most of the research in Fars centered on the Kur River Basin (KRB). Fars has always had a different environment for the formation of different cultures over time, therefore, in order to reach a better understanding of the prehistoric cultures of the region it is necessary to make a brief review of the geographical zones of the plains and valleys of Fars province. Taking into account the existence of several questions and ambiguities regarding Neolithic Fars, the Hormangan site, located in the Bavant River Basin, was excavated. During the excavation, two settlement phases were identified that contained cultural materials relatively comparable to Tol-e Mushki, Tol-e Jari B, Kushk Hezar, and Rahmat Abad sequences. The goal of this paper is to explore the absolute chronology of the Hormangan site as well as other Neolithic sites located in the northern half of the Fars region with a special reference to the local cultural and technological sides of different Neolithic sites throughout the region. Bearing in mind the similarities of Bashi materials with Hormangan, Rahmat Abad, and Mushki regions and the absolute chronology of these regions, consideration of Bashi phase does not seem logical. Therefore, by comparing the cultural materials and absolute chronology done in other regions, a sequence chronology including Rahmat Abad (7500–7000 BC), formative Mushki (7000–6400 BC), Mushki (6400–6000 BC), Jari (6000–5600 BC), and Shams Abad (5600–5200 BC) for the Neolithic period of Fars can be presented. According to the excavation of Rahmatabad and Tal-e Sangi, it seems that Fars was inhabited in the middle of the 8th millennium BC and the Neolithic package entered this area, and there is no evidence of the Neolithization process. In the past, the Mushaki period was introduced as the oldest pottery Neolithic period, but with new excavations, it seems that the use of pottery had become common in Fars, as in many parts of Southwest Asia, around 7000 BC.