bluuebunny/crossref_metadata_2025 huggingface dataset:
A miniaturized microstrip antenna with tunable double band-notched characteristics for UWB applications
Authors: Chao Zhang , Zitong Zhao , Pei Xiao , Jie Yu , Zhu Liu , Gaosheng Li
Published: November 2022

This paper proposes the step-by-step design procedure for obtaining independent dual band-notch performance, which provides a valuable method for designing tunable dual band-notched UWB antenna. The proposed antenna consists of the semicircle ring-like radiating patch with an elliptical-shaped slot and double split ring resonators on the top surface of the substrate and defected ground structure (DGS) on the bottom surface of the substrate. The operating frequencies ranged from 1.3 to 11.6 GHz (S11 < − 10 dB). By loading varactor diodes at the gap of the resonators structure and changing the varactor diode’s reverse bias voltage(0–30 V), a wider band-notched tuning range from 2.47–4.19 to 4.32–5.96 GHz can be achieved, which covers the whole WiMAX band and WLAN band. The experimental results agree well with the simulated results. The notched gain at notched frequency points is about − 5.3 dBi and − 5 dBi, demonstrating that the narrow-band interference signal could be efficiently suppressed. The security of UWB communication systems can be further enhanced. Meanwhile, the selection of varactor diode and DC bias circuit are fully considered. Hence, the accuracy of the experiment results and antenna operating performance have been improved. Furthermore, the proposed antenna only has an electrical size of 0.26λ*0.19λ at 1.3 GHz. Compared to the related reported antennas, the proposed antenna has achieved a simpler structure, low profile, compact size, tunable dual band-notched characteristics, extensive independent tunable range, and good band-notched performance simultaneously, to the best of our knowledge. The proposed antenna is believed to have a valuable prospect in UWB communication, Wireless Body Area Network, Industry Science Medicine, mobile communication applications, etc.
Sub-10 second fly-scan nano-tomography using machine learning
Authors: Zhang Jiayong , Lee Wah-Keat , Ge Mingyuan
Published: November 2022

X-ray computed tomography is a versatile technique for 3D structure characterization. However, conventional reconstruction algorithms require that the sample not change throughout the scan, and the timescale of sample dynamics must be longer than the data acquisition time to fulfill the stable sample requirement. Meanwhile, concerns about X-ray-induced parasite reaction and sample damage have driven research efforts to reduce beam dosage. Here, we report a machine-learning-based image processing method that can significantly reduce data acquisition time and X-ray dose, outperforming conventional approaches like Filtered-Back Projection, maximum-likelihood, and model-based maximum-a-posteriori probability. Applying machine learning, we achieve ultrafast nano-tomography with sub-10 second data acquisition time and sub-50 nm pixel resolution in a transmission X-ray microscope. We apply our algorithm to study dynamic morphology changes in a lithium-ion battery cathode under a heating rate of 50oC min−1, revealing crack self-healing during thermal annealing. The proposed method can be applied to various tomography modalities.
Introduction to Ayurvedic Formulations: Exploring the Classical Concepts with Modern Science
Authors: Jayaweera J. A. A. S.
Published: November 2022

In Ayurveda, any substance is regarded as a potential source of medicine. Ayurvedic compound formulations are mainly originated from plants (Kasthausadhi) and metals and minerals (Rasausadhi). In Ayurveda, impurified states of mercury, gold, silver, copper, iron, and sulfur are used to convert to Bhasma form. However, the use of metals is regarded as toxic in modern medicine. Interestingly, an ancient knowledge system has utilized the herbal qualities of metals by developing various formulations via chemical and physical modifications. Different manufacturing processes have been employed to ascertain different herbal constituents. In Ayurveda, to assess the quality of the final drugs, subjective parameters are used, while in modern medicine, multiple analytical and advanced biotechniques are employed. The Ayurveda system poses different scales and parameters and can compare those with present scientific scales rapidly. In-depth scientific studies may be required to ascertain the essence of Ayurveda concepts to make them more applicable to modern medicine.
Scientific Approach to the Role of Turmeric in Ayurvedic Formulations and Their Phytochemistry
Authors: Singh Gurmeet , Vinayagan Nadana , Mateen Abdul
Published: November 2022

Curcuma longa L. or turmeric, the golden spice, is one of the most widely used botanicals in traditional medicine systems across the world. Its use in traditional medicine is backed by meticulous documentation of its properties, formulations, uses and benefits in hundreds of classical medical texts. Turmeric is one of the most studied botanicals for its human health benefits in modern science too, with the Curcumin Resource Database showing over 9000 publications and 500 patents. However, there is little to show for the effort in terms of concrete results in the clinical trials and epidemiological studies. Turmeric awaits a new scientific approach that is powered by a holistic framework to test the many benefits associated with it in traditional medicine systems. This chapter reviews the use of turmeric in Ayurveda and analyses its main formulations. It maps turmeric's phytochemicals on its physicochemical properties and suggests this approach as a way to deconstructing its classical formulations for insights.
Phytochemical and Pharmacological Aspects of Cissus quadrangularis in Ayurveda
Authors: UM Dhanalekshmi , Akhtar Jawaid , Khan Shah Alam
Published: November 2022

Cissus quadrangularis L. (family: Vitaceae) is an indigenous medicinal plant of India. It is used to treat several acute and chronic ailments, including bone-related disorders in Ayurveda. This chapter documents various bioactive metabolites isolated from C. quadrangularis. A detailed account of its in vitro and in vivo pharmacological activities, along with plausible mechanisms have been covered in this review. Few clinical studies have been conducted to evaluate its role in bone diseases and in weight loss. Light has been shed on its application and patents which have been granted to help the scientific community to explore the future therapeutic and scientific potential of this plant. Data from several acute and sub-chronic animal studies indicate that daily use of C. quadrangularis stem powder or extract for 90 days does not produce any unwanted side effects. However, there is a scarcity of data on their long-term clinical use in humans. Further preclinical investigations depicting the deep molecular pathways, potential, and mechanistic insights of phytoconstituents are warranted for in-depth scientific knowledge about this pharmaceutically important medicinal plant. Also, more randomized clinical trials are needed to establish the safety and efficacy of this miraculous Ayurvedic medicine in the management and treatment of various ailments.
Local epidermal growth factor delivery using nanopillared chitosan–gelatin films for melanogenesis and wound healing
Authors: Altuntas Sevde , Dhaliwal Harkiranpreet Kaur , Eid Radwan Ahmed , Amiji Mansoor , Buyukserin Fatih
Published: November 2022

Epidermal growth factor (EGF) is required for various regulations of skin tissue, including wound healing; however, it has limited stability due to the physicochemical conditions of the wound milieu.
ICG-loaded and 125I-labeled theranostic nanosystem for multimodality imaging-navigated phototherapy of breast cancer
Authors: Wang Dianyu , Yue Jianlan , Cao Qiannan , Liu Jinjian , Yang Lijun , Shen Wen , Zhang Wenxue , Liu Jianfeng
Published: November 2022

ICG-loaded and 125I-labeled theranostic nanosystem with high biocompatibility for FLI/SPECT-navigated PTT/PDT of breast cancer.
Does chronic consumption of orange juice improve cardiovascular risk factors in overweight and obese adults? A systematic review and meta-analysis of randomized controlled trials
Authors: Li Lu , Jin Nini , Ji Kexin , He Yueyue , Li He , Liu Xinqi
Published: November 2022

This is the first meta-analysis that investigates the effects of chronic consumption of orange juice on cardiovascular risk factors in overweight and obese adults, demonstrating beneficial effects on blood pressure and HDL-C.
Improved water splitting efficiency of Au-NP-loaded Ga2O3 thin films in the visible region under strong coupling conditions
Authors: Wang Yaguang , Shi Xu , Oshikiri Tomoya , Misawa Hiroaki
Published: November 2022

Efficiently enhanced light absorption and zero bias potential water splitting were successfully achieved using the TAGA structure under strong coupling conditions.
Plasmonic hot carrier injection from single gold nanoparticles into topological insulator Bi2Se3 nanoribbons
Authors: Nweze Christian , Glier Tomke E. , Rerrer Mika , Scheitz Sarah , Huang Yalan , Zierold Robert , Blick Robert , Parak Wolfgang J. , Huse Nils , Rübhausen Michael
Published: November 2022

With the aid of nanoscopic Raman spectroscopy, we track the interaction between the injected hot electrons and phonons in Bi2Se3 nanoribbon.
Highly luminescent dual-phase CsPbBr3/Cs4PbBr6 microcrystals for a wide color gamut for backlight displays
Authors: Naresh V. , Jang Taehyung , Pang Yoonsoo , Lee Nohyun
Published: November 2022

Ultrasonication-assisted, ligand-free synthesis of CsPbBr3/Cs4PbBr6 dual-phase MCs exhibit diverse morphologies, confirming that CsPbBr3 NCs are the photoluminescent sites with PLQY of 82.7%.
Transition metal-catalyzed double Cvinyl–H bond activation: synthesis of conjugated dienes
Authors: Maikhuri Vipin K. , Maity Jyotirmoy , Srivastava Smriti , Prasad Ashok K.
Published: November 2022

Recent advances in the synthesis of conjugated dienesviatransition metal-catalyzed double Cvinyl–H bond activation.
Visible-light-promoted radical cascade alkylation/cyclization: access to alkylated indolo/benzoimidazo[2,1-a]isoquinolin-6(5H)-ones
Authors: Yu Wen-Qin , Xiong Bi-Quan , Zhong Long-Jin , Liu Yu
Published: November 2022

A visible-light-promoted alkylation/cyclization of active alkenes via radical cascade cyclization for the preparation of functionalized isoquinolinones by using Hantzsch esters as alkylation radical precursors.
Transition metal-free annulative vinylene transfer via the 1,3-dipolar reaction of N-ylides: access to benzo-fused indolizines
Authors: Zhao Limin , Li Wen , Liu Jiali , Ni Linying , Liu Zhihao , Shen Hao , Cao Hua , Liu Xiang
Published: November 2022

An efficient metal-free annulative vinylene transfer protocol for the synthesis of benzo-fused indolizines via 1,3-dipolar cycloadditions of N-ylides with vinylene carbonate has been developed.
Trifluoromethylated thermally activated delayed fluorescence molecule as a versatile photocatalyst for electron-transfer- and energy-transfer-driven reactions
Authors: Morofuji Tatsuya , Kurokawa Takuma , Chitose Youhei , Adachi Chihaya , Kano Naokazu
Published: November 2022

Trifluoromethylated thermally activated delayed fluorescent molecule 4[Cz(CF3)2]IPN has been demonstrated as a versatile photocatalyst that facilitates radical reactions via electron transfer and dearomative cycloaddition via energy transfer.
Silica gel supported ionic liquids as effective and reusable catalysts for the synthesis of highly reactive polyisobutylene in non-polar media
Authors: Berezianko Ivan A. , Vasilenko Irina V. , Kostjuk Sergei V.
Published: November 2022

A green approach for the synthesis of highly reactive polyisobutyleneviaheterogeneous cationic polymerization using a reusable catalyst was developed.
(Bipyridine bisphenolate)-aluminum/onium salt pair: a highly active binary catalyst for ring-opening polymerization of lactide with improved thermostability and protic tolerance
Authors: Wang Mingqian , Ding Zhiqiang , Wang Bin , Li Yuesheng
Published: November 2022

A series of bipyridine bisphenolate aluminum complexes with outstanding thermostability and tolerance to protic agents were synthesized and used to catalyze the ROP of LA with assist of onium salt as cocatalyst in epoxide.
Isolation of oligostilbenes fromIris lacteaPall. var.chinensis(Fisch.) Koidz and their anti-inflammatory activities
Authors: Tie Fang-Fang , Fu Yang-Yang , Hu Na , Chen Zhi , Wang Hong-Lun
Published: November 2022

Oligostilbenes fromIris lacteaPall.var.chinensis(Fisch.) Koidz and their anti-inflammatory activities.
Facile, rapid and efficient isolation of circulating tumor cells using aptamer-targeted magnetic nanoparticles integrated with a microfluidic device
Authors: Kajani Abolghasem Abbasi , Rafiee Laleh , Samandari Mohamadmahdi , Mehrgardi Masoud Ayatollahi , Zarrin Bahare , Javanmard Shaghayegh Haghjooy
Published: November 2022

Facile and sensitive detection and isolation of circulating tumor cells (CTCs) was achieved using the aptamer-targeted magnetic nanoparticles (Apt-MNPs) in conjugation with a microfluidic device.
Polyoxometalate–peptide hybrid materials: from structure–property relationships to applications
Authors: Soria-Carrera Héctor , Atrián-Blasco Elena , Martín-Rapún Rafael , Mitchell Scott G.
Published: November 2022

Organo-functionalisation of polyoxometalates with peptide moieties is an effective approach to obtain diverse arrays of functional hybrid materials, where each component influences the resulting change, surface chemistry, polarity, and redox properties.
Catalysis enabled synthesis, structures, and reactivities of fluorinated S8-corona[n]arenes (n = 8–12)
Authors: Turley Andrew. T. , Hanson-Heine Magnus W. D. , Argent Stephen. P. , Hu Yaoyang , Jones Thomas. A. , Fay Michael , Woodward Simon
Published: November 2022

NR4F salts simultaneously catalyse and template the reaction of dithiols with C6F6 to generate the first fluorinated corona[n]arenes. Simple SNAr functionalisation of the fluoraryl units easily afford diverse libraries of macrocyclic building blocks.
Synthesis and characterization of bi(metallacycloprop-1-ene) complexes
Authors: Bai Wei , Tsang Long Yiu , Wang Yilun , Li Yang , Sung Herman H. Y. , Williams Ian D. , Jia Guochen
Published: November 2022

Well-defined metallacycloprop-1-ene complexes have only previously been isolated with a metal center bearing one vinyl moiety. We have successfully obtained the first examples of structurally characterized spiro bi(metallacycloprop-1-ene) complexes.
Miscibility, thermal degradation and rheological analysis of epoxy/MABS blends
Authors: Joy Jomon , Winkler Krzysztof , Bassa Anna , Vijayan P Poornima , Jose Seno , Anas Saithalavi , Thomas Sabu
Published: November 2022

The effect of the addition of the methyl methacrylate acrylonitrile butadiene styrene (MABS) copolymer on the miscibility, thermal degradation and rheological properties of epoxy systems is described.
Dynamics of magnetic Janus colloids studied by ultra small-angle X-ray photon correlation spectroscopy
Authors: Zinn Thomas , Sharpnack Lewis , Narayanan Theyencheri
Published: November 2022

Advanced synchrotron scattering methods elucidate the chain-like ordering and associated dynamics of magnetic Janus particles as a function of magnetic field. Particle dynamics slows down anisotropically with the magnetic field.
Retraction: Formation of Fe3O4@MnO2 ball-in-ball hollow spheres as a high performance catalyst with enhanced catalytic performances
Authors: Zhang Shouwei , Fan Qiaohui , Gao Huihui , Huang Yongshun , Liu Xia , Li Jiaxing , Xu Xijin , Wang Xiangke
Published: November 2022

Retraction of ‘Formation of Fe3O4@MnO2 ball-in-ball hollow spheres as a high performance catalyst with enhanced catalytic performances’ by Shouwei Zhang et al., J. Mater. Chem. A, 2016, 4, 1414–1422, https://doi.org/10.1039/C5TA08400H.
Transition metallo-curcumin complexes: a new hope for endometriosis?
Authors: Singh Apoorva , Ghosh Pooja , Mukherjee Suranjana , Ojha Atul Kumar , Hansda Anita , Choudhury Priyanka , Halder Subhash , Sharma Sunita , Mukherjee Gayatri , Dasgupta Swagata , Chaudhury Koel
Published: November 2022

The metallo-curcumin complexes, copper–curcumin and nickel–curcumin, are promising anti-endometriotic agents due to their high antioxidant activity, selective cytotoxicity and active transport mediated accumulation in endometriotic cells.
Development of emamectin benzoate-loaded liposome nano-vesicles with thermo-responsive behavior for intelligent pest control
Authors: Du Qian , Chen Long , Ding Xiquan , Cui Bo , Chen Hongyan , Gao Fei , Wang Yan , Cui Haixin , Zeng Zhanghua
Published: November 2022

An emamectin benzoate-loaded liposome nano-vesicle (EB-Lip-NV) with thermo-responsive characteristics was developed to effectively control the population of nocturnal pests and improve insecticidal activity.
Clutter suppression and target energy focussing for airborne rotating antenna radar using improved Space‐time adaptive processing
Authors: Zhou Lichao , Wu Yifeng , Deng Xiaobo , Zhang Lei , Wu Jianxin , Zhang Qiang , Duan Jia
Published: November 2022

Rotating antenna radar is widely used on the airborne platform to extend the range of the radar detection airspace. However, the echo signal received by an airborne rotating radar is spread in the Doppler domain due to the platform motion and the antenna rotation. In the process of a long‐time integration, the antenna rotation harms the signal‐to‐noise ratio and reduces the performance of target detection when using conventional processing methods. Although conventional space‐time adaptive processing (STAP) has been used successfully to suppress clutter on an airborne radar, it does not take into account the antenna rotation. It decreases the performance of clutter suppression on the airborne rotating antenna radar. The signal model of airborne rotating antenna radar is analysed and the STAP technique to the rotating antenna scenario is improved to effectively suppress clutter and focus on target energy. Firstly, the echo of the airborne rotating antenna radar is modelled. Secondly, the factors affecting the Doppler difference of the array elements are investigated. Thirdly, an improved STAP method is proposed. Finally, the effect of antenna rotation on clutter Doppler characteristics and the clutter suppression and target energy focussing on the effects of the improved STAP technique are investigated. Experimental results demonstrate the effectiveness of the proposed method.
Non-ideal magnetohydrodynamics of self-gravitating filaments
Authors: Gutiérrez-Vera Nicol , Grassi Tommaso , Bovino Stefano , Lupi Alessandro , Galli Daniele , Schleicher Dominik R. G.
Published: November 2022

Context. Filaments have been studied in detail through observations and simulations. A range of numerical works have separately investigated how chemistry and diffusion effects, as well as magnetic fields and their structure impact the gas dynamics of the filament. However, non-ideal effects have hardly been explored thus far.

Aims. We investigate how non-ideal magnetohydrodynamic (MHD) effects, combined with a simplified chemical model affect the evolution and accretion of a star-forming filament.

Methods. We modeled an accreting self-gravitating turbulent filament using LEMONGRAB, a one-dimensional (1D) non-ideal MHD code that includes chemistry. We explore the influence of non-ideal MHD, the orientation and strength of the magnetic field, and the cosmic ray ionization rate, on the evolution of the filament, with particular focus on the width and accretion rate.

Results. We find that the filament width and the accretion rate are determined by the magnetic field properties, including the initial strength, the coupling with the gas controlled by the cosmic ray ionization rate, and the orientation of the magnetic field with respect to the accretion flow direction. Increasing the cosmic-ray ionization rate leads to a behavior closer to that of ideal MHD, reducing the magnetic pressure support and, hence, damping the accretion efficiency with a consequent broadening of the filament width. For the same reason, we obtained a narrower width and a larger accretion rate when we reduced the initial magnetic field strength. Overall, while these factors affect the final results by approximately a factor of 2, removing the non-ideal MHD effects results in a much greater variation (up to a factor of 7).

Conclusions. The inclusion of non-ideal MHD effects and the cosmic-ray ionization is crucial for the study of self-gravitating filaments and in determining critical observable quantities, such as the filament width and accretion rate.
The Gaia-ESO survey: Placing constraints on the origin of r-process elements
Authors: Van der Swaelmen M. , Viscasillas Vázquez C. , Cescutti G. , Magrini L. , Cristallo S. , Vescovi D. , Randich S. , Tautvaišienė G. , Bagdonas V. , Bensby T. , Bergemann M. , Bragaglia A. , Drazdauskas A. , Jiménez-Esteban F. , Guiglion G. , Korn A. , Masseron T. , Minkeviiūtė R. , Smiljanic R. , Spina L. , Stonkutė E. , Zaggia S.
Published: November 2022

Context. A renewed interest in the origin of r-process elements has been stimulated by the multi-messenger observation of the gravitational event GW170817, with the detection of both gravitational waves and electromagnetic waves corresponding to the merger of two neutron stars. Such a phenomenon has been proposed as one of the main sources of the r-process. However, the origin of the r-process elements at different metallicities is still under debate.

Aims. We aim at investigate the origin of the r-process elements in the Galactic thin-disc population.

Methods. From the sixth internal data release of the Gaia-ESO, we have collected a large sample of Milky Way (MW) thin- and thick-disc stars for which abundances of Eu, O, and Mg are available. The sample consists of members of 62 open clusters (OCs), located at a Galactocentric radius between ∼5 kpc and ∼20 kpc in the disc, in the metallicity range [ − 0.5, 0.4], and covering an age interval from 0.1 to 7 Gy, and about 1300 Milky Way disc field stars in the metallicity range [ − 1.5, 0.5]. We compare the observations with the results of a chemical evolution model, in which we varied the nucleosynthesis sources for the three elements considered.

Results. Our main result is that Eu in the thin disc is predominantly produced by sources with short lifetimes, such as magneto-rotationally driven SNe. There is no strong evidence for additional sources at delayed times.

Conclusions. Our findings do not imply that there cannot be a contribution from mergers of neutron stars in other environments, as in the halo or in dwarf spheroidal galaxies, but such a contribution is not needed to explain Eu abundances at thin-disc metallicities.
Characterizing the patchy appearance of the circumgalactic medium and the influence of foreground absorption
Authors: Ponti G. , Sanders J. S. , Locatelli N. , Zheng X. , Zhang Y. , Yeung M. , Freyberg M. , Dennerl K. , Comparat J. , Merloni A. , Di Teodoro E. , Sasaki M. , Reiprich T. H.
Published: November 2022

Context. Recent studies have demonstrated that the emission from the circumgalactic medium displays a relatively high degree of patchiness on angular scales of ∼10°.

Aims. Taking advantage of the Spectrum Roentgen Gamma eROSITA Final Equatorial Depth Survey, we aim to constrain any variation in the X-ray surface brightness on scales ranging from sub-degrees to a hundred square degrees.

Result. The surface brightness in the soft X-ray band (0.3–0.45 keV) shows modulations of about 60% on scales of several degrees. The amplitude of such variations decreases at higher energies. The observed patchiness is stable over a period of two years, therefore excluding the possiblity that it could have been induced by solar wind charge exchange. We also observe no correlation between such an excess and the density of galaxies in the Local Universe, suggesting no strong contribution from the hot baryons in the filaments of the cosmic web. Instead, the soft X-ray emission is anti-correlated with the column density of absorbing material. Indeed, we can reproduce the spectrum of the bright and dark regions by simply varying the column density of the matter absorbing the emission components located beyond the Local Hot Bubble, while no modulation of the intrinsic emission is required. At high Galactic latitudes, the eROSITA all-sky map shows patchiness of the soft X-ray diffuse emission similar to the one observed in the eFEDS field; it is therefore likely that the same “absorption-modulation”is present over the entire sky.

Conclusions. The observed patchiness of soft X-ray diffuse emission within the eFEDS field is primarily a consequence of absorption. Our spectral decomposition of the soft X-ray background appears accurate, predicting that (apart from the Local Hot Bubble) all other spectral components are modulated by clouds beyond ∼200 pc from the Sun. These results highlight the importance of an accurate treatment of the absorption effects in determining the patchiness of the circumgalactic medium.
TOI-179: A young system with a transiting compact Neptune-mass planet and a low-mass companion in outer orbit
Authors: Desidera S. , Damasso M. , Gratton R. , Benatti S. , Nardiello D. , D’Orazi V. , Lanza A. F. , Locci D. , Marzari F. , Mesa D. , Messina S. , Pillitteri I. , Sozzetti A. , Girard J. , Maggio A. , Micela G. , Malavolta L. , Nascimbeni V. , Pinamonti M. , Squicciarini V. , Alcalá J. , Biazzo K. , Bohn A. , Bonavita M. , Brooks K. , Chauvin G. , Covino E. , Delorme P. , Hagelberg J. , Janson M. , Lagrange A.-M. , Lazzoni C.
Published: November 2022

Context. Transiting planets around young stars are key benchmarks for our understanding of planetary systems. One such candidate, TOI-179, was identified around the K dwarf HD 18599 by TESS.

Aims. We present the confirmation of the transiting planet and the characterization of the host star and of the TOI-179 system over a broad range of angular separations.

Methods. We exploited the TESS photometric time series, intensive radial velocity monitoring performed with HARPS, and deep high-contrast imaging observations obtained with SPHERE and NACO at VLT. The inclusion of Gaussian process regression analysis was effective to properly model the magnetic activity of the star and identify the Keplerian signature of the transiting planet.

Results. The star, with an age of 400±100 Myr, is orbited by a transiting planet with period 4.137436 days, mass 24±7 M⊕, radius 2.62−0.12+0.15 R⊕, and significant eccentricity (0.34−0.09+0.07). Adaptive optics observations identified a low-mass companion at the boundary between brown dwarfs and very low-mass stars (mass derived from luminosity 83−6+4 MJ) at a very small projected separation (84.5 mas, 3.3 au at the distance of the star). Coupling the imaging detection with the long-term radial velocity trend and the astrometric signature, we constrained the orbit of the low-mass companion, identifying two families of possible orbital solutions.

Conclusions. The TOI-179 system represents a high-merit laboratory for our understanding of the physical evolution of planets and other low-mass objects and of how the planet properties are influenced by dynamical effects and interactions with the parent star.
3D Quadratic ODE systems with an infinite number of limit cycles
Authors: Musafirov Eduard , Grin Alexander , Pranevich Andrei , Munteanu Florian , Şterbeţi Cătălin
Published: November 2022

We consider an autonomous three-dimensional quadratic ODE system with nine parameters, which is a generalization of the Langford system. We derive conditions under which this system has infinitely many limit cycles. First, we study the equilibrium points of such systems and their eigenvalues. Next, we prove the non-local existence of an infinite set of limit cycles emerging by means of Andronov – Hopf bifurcation.
Endobronchiale Fremdkörper, die lesbare Geschichten erzählen
Authors: Haasler Edgar , Garhy Mohamed , Arndt Stefan , Schönhofer Bernd
Published: November 2022

Wir präsentieren zwei Fallberichte, bei denen in überraschender Weise lesbare Schrift bzw. Zahlen auf dem aspirierten Material nützliche Informationen zu den näheren Umständen der Aspiration lieferten.

Im ersten Fall klagte die Patientin nach Benutzung eines Dosieraerosols über Fremdkörpergefühl. Wenige Stunden später wurde das anfangs unbekannte aspirierte Material durch flexible Bronchoskopie geborgen. Mithilfe des Textfragments auf dem Material konnte geschlossen werden, dass es sich um die Verpackungsfolie eines Bonbons handelte, die bei der Aufbewahrung in der Jackentasche der Patientin in das Mundstück des Dosieraerosols gelangt war.

Im zweiten Fall traten bei dem Patienten über Jahre rezidivierend Pneumonien auf. Mithilfe der Seriennummer auf dem bronchoskopisch geborgenen Plastikmaterial konnte der genaue Zeitpunkt und Ort der Aspiration ermittelt werden. Der Patient hatte während seiner beruflichen Tätigkeit in einer Autowerkstatt das Plastiketikett eines Ersatzteils aspiriert.
Anerkannter Grad der Behinderung (GdB) im Langzeitverlauf nach
Kraniopharyngeom im Kindes- und Jugendalter
Authors: Boekhoff Svenja , Eveslage Maria , Beckhaus Julia , Friedrich Carsten , Müller Hermann L.
Published: November 2022

Hintergrund Kraniopharyngeome sind seltene embryonale Fehlbildungstumore
niedriger Malignität. Die Langzeitprognose nach Diagnose im Kindes- und
Jugendalter wird häufig durch (neuro)endokrine Spätfolgen
beeinträchtigt. Eine Anerkennung des Schwerbehindertenstatus mit
unterschiedlichen Graden der Behinderung (GdB) kann die psychosoziale
Integration erleichtern.

Patienten und Methoden 108 Patienten, die mit kindlichem Kraniopharyngeom
in der Studie HIT-Endo registriert wurden, konnten nach im Median 16 Jahren
Follow-up hinsichtlich des aktuellen GdB und assoziierter Faktoren wie
endokriner, ophthalmologischer, neuropsychologischer (QLQ-C30; MFI-20;
FMH-Skala) und psychosozialer Befunde ausgewertet werden.

Ergebnisse 47 Patienten (43%) hatten keine Anerkennung einer
Behinderung oder einen GdB 30–40, 43 Patienten (40%) einen GdB
50–90 und 18 Patienten (17%) einen GdB 100. Höhere GdB
waren assoziiert mit niedrigerem schulischen Bildungsniveau, höherem
BMI-SDS, einer höheren Rate an Sehbeeinträchtigungen und
hypothalamischer Beteiligung des Kraniopharyngeoms. Patienten mit einem GdB 100
litten häufiger an Einschränkungen der physischen und kognitiven
Funktion, Atemnot und Schmerzzuständen (QLQ-C30), sowie Fatigue
(MFI-20), und Einschränkungen im sozialen und beruflichen Kontext.
Patienten mit GdB 100 haben im Mittel eine herabgesetzte funktionelle
Kapazität (FMH Score) gegenüber Patienten mit niedrigerem
GdB.

Schlussfolgerungen Der anerkannte GdB zeigt sich assoziiert mit
psychosozialen und gesundheitlichen Einschränkungen im Langzeitverlauf
nach Kraniopharyngeom. Die funktionelle Kapazität zeigt im Mittel einen
großen Unterschied zwischen GdB 100 und niedrigerem GdB.
Doppler Ultrasound of Vascular Complications After Pediatric Liver Transplantation: Incidence, Time of Detection, and Positive Predictive Value
Authors: Verhagen Martijn V. , de Kleine Ruben H.J. , van der Doef Hubert P.J. , Kwee Thomas C. , de Haas Robbert J.
Published: November 2022

Purpose Doppler ultrasound (DUS) is widely used to detect vascular complications after pediatric liver transplantation (LT). This study aimed to assess the moment of first detection of vascular complications with DUS, and to determine the positive predictive value (PPV) of DUS.

Materials and Methods Patients aged 0–18 years who underwent LT between 2015 and 2019 were retrospectively included. 92 LTs in 83 patients were included (median age: 3.9 years, interquartile range: 0.7–10.5). Patients underwent perioperative (intra-operative and immediately postoperative) and daily DUS surveillance during the first postoperative week, and at 1, 3, and 12 months. Vascular complications were categorized for the hepatic artery, portal vein, and hepatic veins. DUS findings were compared to surgical or radiological findings during the 1-year follow-up.

Results 52 vascular complications were diagnosed by DUS in 35/92 LTs (38%). 15 out of 52 (28.8%) were diagnosed perioperatively, 29/52 (55.8%) were diagnosed on postoperative days 1–7, and 8/52 (15.4%) after day 7. The PPV for all vascular complications diagnosed with DUS was 92.3%. During the 1-year follow-up, 18/19 (94.7%) hepatic artery complications, 19/26 (73.1%) portal vein complications, and 7/7 (100%) hepatic vein complications were diagnosed perioperatively or during the first week.

Conclusion The majority of vascular complications during the first year after pediatric LT were diagnosed by DUS perioperatively or during the first week, with a high PPV. Our findings provide important information regarding when to expect different types of vascular complications on DUS, which might improve DUS post-LT surveillance protocols.
The RAPID Consortium: A Platform for Clinical and Translational Pituitary Tumor Research
Authors: Karsy Michael , Kshettry Varun , Gardner Paul , Chicoine Michael , Fernandez-Miranda Juan C. , Evans James J. , Barkhoudarian Garni , Hardesty Douglas , Kim Won , Zada Gabriel , Crocker Tomiko , Torok Ildiko , Little Andrew
Published: November 2022

Objectives Pituitary tumor treatment is hampered by the relative rarity of the disease, absence of a multicenter collaborative platform, and limited translational–clinical research partnerships. Prior studies offer limited insight into the formation of a multicenter consortium.

Design The authors describe the establishment of a multicenter research initiative, Registry of Adenomas of the Pituitary and Related Disorders (RAPID), to encourage quality improvement and research, promote scholarship, and apply innovative solutions in outcomes research.

Methods The challenges encountered during the formation of other research registries were reviewed with those lessons applied to the development of RAPID.

Setting/Participants RAPID was formed by 11 academic U.S. pituitary centers.

Results A Steering Committee, bylaws, data coordination center, and leadership team have been established. Clinical modules with standardized data fields for nonfunctioning adenoma, prolactinoma, acromegaly, Cushing's disease, craniopharyngioma, and Rathke's cleft cyst were created using a Health Insurance Portability and Accountability Act-compliant cloud-based platform. Currently, RAPID has received institutional review board approval at all centers, compiled retrospective data and agreements from most centers, and begun prospective data collection at one site. Existing institutional databases are being mapped to one central repository.

Conclusion The RAPID consortium has laid the foundation for a multicenter collaboration to facilitate pituitary tumor and surgical research. We sought to share our experiences so that other groups also contemplating this approach may benefit. Future studies may include outcomes benchmarking, clinically annotated biobank tissue, multicenter outcomes studies, prospective intervention studies, translational research, and health economics studies focused on value-based care questions.
Study on general criteria for generalized chaotic synchronization with a desired manifold
Authors: Yu Xiang , Zuo Zhaolun , Zhu Shijian , Zhang Xuxin
Published: November 2022

One of the techniques to improve the underwater acoustic stealth performance of ships is to use the wide-spectrum characteristics of chaotic signals to weaken the line spectrum of radiated underwater acoustic signals. To modulate the signal in an expected way, this paper proposes a criterion for constructing a bidirectionally coupled system based on the original system, which enables the response system and the drive system to achieve generalized chaotic synchronization with the desired manifold and gives a method to determine the reliable interval of coupling coefficients. The simplified criterion is suitable for constructing a unidirectionally coupled system. Taking the Chen system and Chua’s circuit as examples, the reliable interval of coupling coefficient is deduced by using the proposed criterion. Bidirectionally coupled chaotic systems are constructed for the desired linear manifold and nonlinear manifold, and the validity of the construction method and the criterion is verified by numerical simulation.
Design elements and first data from a new Doppler backscattering system on the MAST-U spherical tokamak
Authors: Rhodes T. L. , Michael C. A. , Shi P. , Scannell R. , Storment S. , Pratt Q. , Lantsov R. , Fitzgerald I. , Hall-Chen V. H. , Crocker N. A. , Peebles W. A.
Published: November 2022

A new Doppler backscattering (DBS) system has been installed and tested on the MAST-U spherical tokamak. It utilizes eight simultaneous fixed frequency probe beams (32.5, 35, 37.5, 40, 42.5, 45, 47.5, and 50 GHz). These frequencies provide a range of radial positions from the edge plasma to the core depending on plasma conditions. The system utilizes a combination of novel features to provide remote control of the probed density wavenumber, the launched polarization (X vs O-mode), and the angle of the launched DBS to match the magnetic field pitch angle. The range of accessible density turbulence wavenumbers (kθ) is reasonably large with normalized wavenumbers kθρs ranging from ≤0.5 to 9 (ion sound gyroradius ρs = 1 cm). This wavenumber range is relevant to a variety of instabilities believed to be important in establishing plasma transport (e.g., ion temperature gradient, trapped electron, electron temperature gradient, micro-tearing, kinetic ballooning modes). The system is specifically designed to address the requirement of density fluctuation wavevector alignment which can significantly reduce the SNR if not accounted for.
Construction and study of instrument response functions for analysis of the National Ignition Facility (NIF) neutron time-of-flight detectors
Authors: Kerr S. , Eckart M. J. , Hahn K. , Hartouni E. P. , Jeet J. , Landen O. L. , Moore A. S. , Schlossberg D. J.
Published: November 2022

The analysis of the National Ignition Facility (NIF) neutron time-of-flight (nToF) detectors uses a forward-fit routine that depends critically on the instrument response functions (IRFs) of the diagnostics. The details of the IRFs used can have large impacts on measurements such as ion temperature and down-scattered ratio (DSR). Here, we report on the recent steps taken to construct and validate nToF IRFs at the NIF to an increased degree of accuracy, as well as remove the need for fixed DSR baseline offsets. The IRF is treated in two parts: a “core,” measured experimentally with an x-ray impulse source, and a “tail” that occurs later in time and has limited experimental data. The tail region is calibrated with the data from indirect drive exploding pusher shots, which have little neutron scattering and are traditionally assumed to have zero DSR. Using analytic modeling estimates, the non-zero DSR for these shots is estimated. The impact of varying IRF tail components on DSR is investigated with a systematic parameter study, and good agreement is found with the non-zero DSR estimates. These approaches will be used to improve the precision and uncertainty of NIF nToF DSR measurements.
Data-driven linear time advance operators for the acceleration of plasma physics simulation
Authors: De Pascuale Sebastian , Green David L. , Lore Jeremy D.
Published: November 2022

We demonstrate the application of data-driven linear operator construction for time advance with a goal of accelerating plasma physics simulation. We apply dynamic mode decomposition (DMD) to data produced by the nonlinear SOLPS-ITER (Scrape-off Layer Plasma Simulator - International Thermonuclear Experimental Reactor) plasma boundary code suite in order to estimate a series of linear operators and monitor their predictive accuracy via online error analysis. We find that this approach defines when these dynamics can be represented by a sequence of approximate linear operators and is essential for providing consistent projections when compared to an unconstrained application. For linear diffusion and advection–diffusion fluid test problems, we construct and apply operators within explicit and implicit time advance schemes, demonstrating that stability can be robustly guaranteed in each case. We further investigate the use of the linear time advance operators within several integration methods including forward Euler, backward Euler, and the matrix exponential. The application of this method to simulation data from SOLPS-ITER, with varying levels of Markov chain Monte Carlo numerical noise, shows that constrained DMD operators yield a capability to identify, extract, and integrate a (slow) subset of the present timescales. Example applications show that for projected speedup factors of 2×, 4×, and 8×, a mean relative error of 3%, 5%, and 8% and maximum relative error less than 20% are achievable, which appears acceptable for typical SOLPS-ITER steady-state simulations.
A high-efficient photo-thermoelectric coupling generator of cuprous iodide
Authors: Cao Chongyang , Chen Shuai , Liang Jiawen , Li Tingting , Yan Zhanlin , Zhang Bing , Chen Naichao
Published: November 2022

Thermoelectric (TE) energy converters have attracted great interest due to their maintenance-free, long-life, and high-reliability properties. However, improving the output power of TE devices remains a huge challenge. In this work, a high-efficient photo-TE coupling generator based on cuprous iodide (CuI) film is proposed to increase the output power of TE devices. Here, CuI film was prepared by the successive ionic layer adsorption and reaction method. The influence of the photovoltaic (PV) effect on the TE output voltage of CuI film was investigated by an analysis of the experimental results. The results showed that the output voltage of the photo-TE coupling generator had a maximum increment of 83.47% at 343 K compared to the sum of TE and PV voltages. The increase in the output voltage was mainly because of the PV effect rather than the TE effect, while the photo-generated electrons also induce a considerable change in the TE figure of merit. Hence, the strategy proposed in this work might be a potential approach to further improve the output performance of other TE materials.
Polypyrrole@Reduced graphene oxide@Liquid metal composites for efficient electromagnetic wave absorption
Authors: Wang Lichang , Huang Li , Li Yibin , Yuan Ye
Published: November 2022

Recently, non-magnetic composites acting as microwave absorbing materials are gaining more attention due to their unique advantages. In this work, polypyrrole@reduced graphene oxide@liquid metal (PGL) composites were successfully prepared through a simple approach as efficient microwave absorbing materials. The impedance matching performance of the composite was accurately adjusted by controlling the amount of graphene oxide (GO) and polypyrrole layer. The optimum PGL composite obtained a reflection loss of −46.81 dB at a low frequency of 2.17 GHz. This method provides a reference path in liquid metal-based non-magnetic microwave absorbing materials.
Reflective nonresonant amplification of powerful terahertz wave pulses by relativistic electron bunches
Authors: Oparina Yu. S. , Krygina D. D. , Savilov A. V.
Published: November 2022

We describe the concept of an amplifier based on a principally nonlinear effect of reflection of an electron bunch from a short powerful wave pulse. This is an effective mechanism of energy extraction by the wave from particles which does not require providing of any type of the electron–wave resonance and ensures amplification of wave pulses with relatively high peak powers.
The short-range order in liquid water and amorphous ice
Authors: Ellert Neta , Yahel Eyal , Makov Guy
Published: November 2022

The short-range order in water and ice was determined from experimentally measured partial radial distribution functions by applying the Quasi Crystalline Model (QCM). Partial radial distribution functions were analyzed for water at several pressures and temperatures, crystalline ice, and for the three known phases of amorphous ice: Low-Density Amorphous (LDA), High-Density Amorphous (HDA), and Very-High-Density Amorphous (VHDA). It was found that at low temperatures and pressures, the short-range order of water is similar to that of the hexagonal ice (Ih) structure. At higher pressures and low temperatures, the short-range order of water becomes similar to that of tetragonal ice III structures with a c/a ratio of 0.8. At higher temperatures of 573 K, the short-range order obtained was similar to that of rhombohedral ice II (α = 113°). As for the amorphous ices, we conclude from the QCM analysis that these three forms are structurally distinct with short-range orders corresponding to ice Ih, ice III, and ice II for LDA, HDA, and VHDA ices, respectively.
220 nm deep-UV coherent source based on fifth-harmonic generation in ADP and DKDP crystals
Authors: Cui Zijian , Sun Mingying , Wang Chao , Shen Bin , Zhang Xu , Liu De’an , Zhu Jianqiang
Published: November 2022

Based on the 1.1 μm laser radiation obtained by parametrically amplifying Yb:YAG laser using frequency doubling of Nd:YAG laser, a 220 nm deep-UV coherent source was systematically presented via the efficient fifth-harmonic generation (FiHG) in NH4H2PO4 (ADP) and KD2PO4 (DKDP) crystals. In ADP crystals, noncritical phase-matching (NCPM) fourth-harmonic generation (FHG) and FiHG were realized at 109.4 and 31.6 °C, respectively. For DKDP crystals, we demonstrated the critical phase-matching FHG at 57.5 °C and verified that NCPM FiHG can be achieved at 38.7 °C, which was the first demonstration of the FiHG using the DKDP crystal to our knowledge. The energy-dependent conversion efficiencies, angular acceptances, and temperature acceptances of these nonlinear processes were systematically measured. The highest total conversion efficiencies from 1.1 μm to the fifth harmonic in ADP and DKDP crystals were 17.5% and 23.6%, respectively. Owing to the large-aperture availability of KDP-family crystals, this work paves the way for the generation and application of high-energy and high-peak-power deep-UV laser radiation.
Optimization of electrode loading amount in lithium ion battery by theoretical prediction and experimental verification
Authors: Li Xiang , Tian Shuo , Liu Zhifeng , Xu Na , Liu Runru , Wang Dejun , Lü Wei
Published: November 2022

Lithium ion battery is a complex system, and any change in device parameters may significantly affect the overall performance. The prediction of battery behavior based on theoretical simulation is of great significance. In this work, the battery performance with LiNi1/3Co1/3Mn1/3O2 electrodes of different active material loading amounts was theoretically investigated, such as battery rate performance, capacity decay rate, energy and power density, SOC (State of Charge) change, temperature response, and heat source distribution. A 1D electrochemical–3D thermal coupling model was established, and the accuracy and predictability of the model were verified by experiments. An in-depth analysis of batteries under different discharge rates and batteries with different electrode loading amounts is carried out. The results show that the rate performance and capacity change with different electrode loading amounts, which is attributed to the variation in lithium ion diffusion. At the same time, the change in load affects the growth of lithium dendrites and the distribution of SOC, resulting in the thermal runaway of the battery and shortening the battery life.