bluuebunny/crossref_metadata_2025_split huggingface dataset:
A simple SIW balanced directional coupler with high common‐mode suppression
Authors: Sun Nan , Zhao Yong‐Jiu , Yang Xin‐yu , Deng Hong‐wei 
Published: November 2022

AbstractIn this letter, a simple balanced directional coupler with high common‐mode (CM) suppression is designed by using a single‐layer substrate‐integrated waveguide (SIW). The SIW can be considered a naturally balanced structure. The CM noises are able to be intrinsically suppressed when differentially excited along the symmetric H‐plane of SIW. The coupling window with tapered transition is designed for broadening the bandwidth of 3‐dB coupling. The microstrip differential feeding structure with inductive vias and inductive matching section enables planar integration and better impedance matching. Finally, a SIW balanced directional coupler operating at 14–16 GHz is designed and fabricated. Measured results are in good agreement with simulated ones.
A compact triple‐band printed dipole antenna using C‐shaped resonators with stable radiation for GSM/ISM/WLAN applications
Authors: Hatamian Amir , Ghobadi Changiz , Nourinia Javad , Shokri Majid 
Published: November 2022

AbstractA compact printed dipole antenna using an integrated balun is introduced in this work, which is achieved three frequency bands by using C‐shaped resonators. The total dimension of the proposed antenna is 42 × 72 mm2, and it covers the frequency bands of 1.62–1.88, 2.36–2.81, and 5.15–6.16 GHz with S11 < −10 dB. Furthermore, the measured peak gains of the antenna in three frequency bands are equal to 8.52, 9.46, and 6.81 dB, respectively. Dipole antennas with integrated baluns have a main frequency band based on the length of the dipole arms. Nevertheless, in the presented design, two additional frequency bands have been created for the antenna, by producing suitable magnetic couplings between the C‐shaped resonators and the Γ‐shaped feed line innovatively, which has a better radiation behavior, unlike traditional triple‐band antennas. An equivalent circuit of the introduced antenna has been investigated and afterward, the optimized antenna has been fabricated and tested.
A universal and convenient optimization design method of meshed transmission lines using parameter extraction
Authors: Li Mingtai , Li Tuanjie , Tang Yaqiong 
Published: November 2022

AbstractIn this paper, a universal and convenient optimization design method of the meshed transmission lines (TL) is presented. For optimizing meshed TL with the given characteristic impedance and propagation constant, the fast and accurate parameter characterization of meshed TL is a significant problem. A novel parameter extraction scheme is proposed to meet time‐saving and high accuracy of parameter characterization, and the related example analyses are given. Some guidelines for meshed TL design are given, and the transform is achieved from metallic transmission lines device to meshed transmission lines device with the same RF performance. A meshed TL filter is designed with good measurement results.
CIDP prognosis in patients with IVIG treatment‐related fluctuations
Authors: Cook Melissa , Pasnoor Mamatha , Ajroud‐Driss Senda , Brannagan Thomas H. , Dimachkie Mazen M. , Allen Jeffrey A. 
Published: November 2022

AbstractIntroduction/aimsChronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is an acquired immune‐mediated peripheral nerve disorder with variable prognosis and long‐term dependence on immunotherapy. Frequent assessment of grip strength can be a useful tool to identify intravenous immunoglobulin (IVIG) treatment‐related fluctuations (TRFs) and optimize IVIG treatment in real‐time, but the long‐term implications of TRFs are unknown. We aimed to explore the impact that real‐time TRFs had on long‐term CIDP prognosis, strength impairment, and disability.MethodsThis retrospective observational cohort study analyzed standard of care clinical and treatment outcomes in patients who participated in a published prospective study of intra‐IVIG‐cycle grip strength quantification. Patients were analyzed based upon the presence or absence of TRFs, as determined in the initial prospective study.ResultsData were available for 23 CIDP patients with a mean follow‐up period of 44.7 mo. There were no differences in baseline or follow‐up strength, disability, or IVIG usage in patients with a low number of fluctuations compared to those with a high number of fluctuations. In both groups, drug‐free remission was achieved in about one‐third of patients.DiscussionTRFs are important to identify in order to optimize treatment in real time, but poorly predict long‐term disease activity status. The presence of minor TRFs are unlikely to result in substantial accumulation of disability over time. Periodic IVIG optimization trials using objective outcomes are encouraged in all CIDP patients receiving chronic IVIG treatment as a means to identify the lowest effective IVIG dose and frequency.
“His lectures were like watching a show on Netflix”: A success story of laugh tracks in prerecorded undergraduate lessons
Authors: Varhola Andrés 
Published: November 2022

AbstractThe onset of the COVID‐19 pandemic in 2020 put enormous pressure on educators to quickly adapt course materials for online delivery. In my case, a naturally humorous teaching style clashed with the arid world of computers in a virtual environment, leading me to believe in a reduced teaching effectiveness under such conditions, and that my students would suffer from countless hours of dull screentime. This article narrates the story of how a simple technique—adding laugh tracks to prerecorded videos in forestry undergraduate courses—was the foundation of a comprehensive approach to design online instruction with a high entertainment value. Several ideas to integrate humor in online (and face‐to‐face) learning are described based on these experiences and are accompanied by a brief theoretical background highlighting the value of bringing laughter to academic settings. Student feedback clearly indicated that the use of laugh tracks and other humorous elements was well received, especially during the challenging times of learning under lockdowns.
The Catalytic Reduction of Nitroanilines Using Synthesized CuFe2O4 Nanoparticles in an Aqueous Medium
Authors: Naghash‐Hamed Samin , Arsalani Nasser , Mousavi Seyed Borhan 
Published: November 2022

AbstractThe primary objective of this research is to investigate the reduction of 4‐nitroaniline (4‐NA) and 2‐nitroaniline (2‐NA) using synthesized copper ferrite nanoparticles (NPs) via facile one‐step hydrothermal method as a heterogeneous nano‐catalyst. Nitroanilines were reduced in the presence and without the catalyst with a constant amount (100 mg) of reducing agent of sodium borohydride (NaBH4) at room temperature in water to amino compounds. To characterize the functional groups, size, structure, and morphology of as‐prepared magnetic NPs, FTIR, XRD, SEM, and TEM were employed. The UV‐Vis spectrum was utilized to explore the catalytic effect of CuFe2O4. The outcomes revealed that the synthesized CuFe2O4 as a heterogeneous magnetic nano‐catalyst catalyzed the reduction of 4‐NA and 2‐NA significantly faster than other candidate catalysts. The outcomes demonstrated that the catalyst catalyzed 4‐nitroaniline to para‐phenylenediamine (p‐PDA) and 2‐nitroaniline to ortho‐phenylenediamine (o‐PDA) with a constant rate of 7.49×10−2 s−1 and 3.19×10−2 s−1, and conversion percentage of 96.5 and 95.6, in 40 s and 90 s, sequentially. Furthermore, the nanoparticles could be recovered by a magnetic separation method and reused for six consecutive cycles without remarkable loss of catalytic ability.
Large‐eddy simulations of drizzling shallow cumuli using a turbulence‐aware autoconversion parametrization
Authors: Jin Han‐Gyul , Lee Hyunho , Baik Jong‐Jin 
Published: November 2022

AbstractTurbulence in clouds enhances collision between cloud droplets, which is critical to drizzle formation in shallow cumulus clouds. In this study, we develop an autoconversion parametrization that considers the turbulence‐induced collision enhancement (TICE) obtained from a particle trajectory model. We implement the developed parametrization to a large‐eddy simulation model and simulate the Rain In Cumulus over the Ocean (RICO) case to investigate the effects of TICE on shallow cumulus clouds and their sensitivities to the cloud droplet number concentration and horizontal grid resolution. TICE significantly increases the autoconversion rate, leading to large increases in the accretion rate, rainwater path and surface rain rate. The simulations of shallow cumulus clouds are highly sensitive to the cloud droplet number concentration and horizontal grid resolution, and the inclusion of TICE overall reduces the sensitivities. For example, the large rainwater path and surface rain rate that appear when cloud droplet number concentration is relatively low are reduced by TICE, whereas the very small rainwater path and surface rain rate that appear when cloud droplet number concentration is relatively high are increased by TICE. Comparisons with two other TICE‐aware parametrizations based on direct numerical simulation results of droplet collisions in turbulence show that there are substantial differences in TICE effects for different parametrizations, which implies a large uncertainty in simulating turbulent clouds. Among the three parametrizations, the parametrization developed in this study shows intermediate TICE‐induced increases in rainwater path and surface rain rate.
A high‐throughput LC–MS/MS method for simultaneous determination of isoniazid, ethambutol and pyrazinamide in human plasma
Authors: Pršo Kristián , Žideková Nela , Porvazník Igor , Solovič Ivan , Mokrý Juraj , Kertys Martin 
Published: November 2022

RationaleTuberculosis (TB) remains a challenging global infectious disease, mainly affecting the lungs. First‐line anti‐TB drugs play a crucial role in slowing down the rapid spread of TB. In addition, the patient might benefit from therapeutic drug monitoring since it has become an accepted clinical tool for optimizing TB treatment.MethodsA simple and sensitive liquid chromatography/tandem mass spectrometry method was developed to monitor the plasma level of isoniazid, ethambutol and pyrazinamide in plasma samples. A one‐step extraction procedure using an Ostro™ plate was applied, and extracts were analyzed by gradient elution followed by detection on a mass spectrometer by multiple reaction monitoring mode.ResultsThe analytes were separated within 4.2 min and over the concentration range of 0.2–10 μg/ml for isoniazid and ethambutol and 1–65 μg/ml for pyrazinamide. The method was successfully validated according to the European Medicine Agency guideline for the selectivity, linearity and lower limit of detection, precision and accuracy, matrix effect, extraction recovery, carryover, dilution integrity and stability, and applied for quantification of analytes in clinical samples from TB patients.ConclusionsThe presented method allows sensitive and reproducible determination of selected anti‐TB drugs with advantages such as low sample volume requirement, short run time of analysis, one‐step sample preparation procedure with capabilities for phospholipids removal, and a low quantification limit as well as a high degree of selectivity.
Learning and teaching Chinese as a foreign language: A scoping review
Authors: Chan Jessica , Woore Robert , Molway Laura , Mutton Trevor 
Published: November 2022

AbstractDespite the growth of research in learning and teaching Chinese as a Foreign Language (CFL), no scoping review of research published in international, anglophone journals has been published so far. A total of 289 journal articles published in 95 journals were identified and used to provide a bibliometric mapping of research in CFL over three decades. Data from the sampled articles reveals a great diversity of focus in CFL research that has been conducted in more than 24 countries. The included articles also reflect an upsurge in research intensity across several key areas of focus, some of which are related to the distinctive linguistic features of the Chinese language. We also report on the research methods employed by the studies in our sample and the characteristics of their participants. Our mapping of the field identifies gaps in the existing literature which may subsequently inform any focused or comprehensive reviews. We conclude by setting out some implications for future CFL research, both in terms of substantive areas of focus and methodological approaches.
Monkeypox virus diagnosis and laboratory testing
Authors: Nakhaie Mohsen , Arefinia Nasir , Charostad Javad , Bashash Davood , Haji Abdolvahab Mohadeseh , Zarei Mohammad 
Published: November 2022

AbstractThe multi‐country outbreak of monkeypox virus (MPXV) infection, while the coronavirus disease 2019 pandemic is still an ongoing issue, has caused a new challenge. The re‐emergence of MPXV and the rising incidence in non‐endemic countries is turning into an upcoming threat to global health. Hence, rapid identification of the virus with appropriate methodology with the lowest false results plays a critical role in estimating the global extent of the crisis and providing preventive measures. This review summarised the main applicable strategies for primary detection and confirmation of MPXV and highlighted available data in biosafety, requirements, standard operating procedures, specimen collection, transportation and storage of clinical samples, and waste disposal of the viral agent. Also, various assays including molecular techniques, immunoassays, histopathological methods, electron microscopy, genomic sequencing, and cell culture have been illustrated. Moreover, we reflected on current knowledge of the advantages and disadvantages of each approach.
Resilient and event‐triggered control of stochastic jump systems under deception and denial of service attacks
Authors: Xu Yihao , Chai Senchun , Shi Peng , Zhang Baihai , Wang Yanqian 
Published: November 2022

AbstractThis article investigates the resilient and event‐triggered control problem of stochastic jump systems subject to randomly occurring denial of service (DoS) attacks and deception attacks. First, a novel resilient and memory event‐triggered scheme (RMETS) is proposed. The influence caused by DoS attacks is characterized as an uncertainty of the triggering condition. Under the RMETS, the desired security performance of the system and limited network resources can be well balanced while stochastic deception and DoS attacks occur. Second, by using the Lyapunov theory and the linear matrix inequality method, the resilient controller and the proposed RMETS are co‐designed. Sufficient conditions are established to ensure the security performance under the two types of attacks. Finally, numerical and practical examples are rendered to illustrate the effectiveness of the developed approach.
Hyperspectral response and monitoring study of soil moisture content based on the optimized spectral index
Authors: Yan Xiaobin , Qiao Xingxing , Yang Sha , Feng Meichen , Song Xiaoyan , Zhang Meijun , Xiao Lujie , Zhang Zhou , Shafiq Fahad , Yang Wude , Wang Chao 
Published: November 2022

AbstractSoil moisture controls the exchange of energy between the land surface and the atmosphere and significantly affects plant growth and productivity. Hyperspectral (350–2500 nm) monitoring of soil moisture content (SMC) could provide a theoretical basis for the real‐time estimation of spatial and temporal variations in soil moisture. During this study, we have developed SMC prediction models in different soil moisture ranges by using the combination of spectral preprocessing methods and optimized spectral indices. Results indicated that first‐order derivative (FD) preprocessing method can highlight the effective information of the spectra and improve the correlation between spectral reflectance and SMC. The spectral reflectance exhibited a strong correlation with SMC near 1400, 1700, 1900, and 2200 nm. The FD‐NDSI‐W0‐model had the best SMC prediction and applicability (R2 = 0.977, root mean square error = 3.413%, relative percent deviation = 6.171) to predict SMCs. Overall, pretreatment methods, combined with the two‐band random combination to optimize the spectral index to build a prediction model of SMC, could be applied for accurate monitoring of SMC.
Electrochemical Determination of Levofloxacin Using Poly(Pyrogallol Red) Modified Glassy Carbon Electrode
Authors: Koçak Çağrı Ceylan , Aslışen Burak , Karabiberoğlu Şükriye , Özdokur Kemal Volkan , Aslan Avni , Koçak Süleyman 
Published: November 2022

AbstractIn this paper, an electrochemical sensor for levofloxacin detection was developed by electrochemical polymerization of pyrogallol red (PGR) on the glassy carbon electrode (GCE) surfaces. Surface morphology and electrical properties of the Poly(PGR)/GCE obtained was characterized by SEM and EIS techniques. Voltammetric behaviour of the levofloxacin was found pH dependent, and the best response was obtained at pH 6.0 PBS. By monitoring the peak current at around 0.9 V, a wide linear range of calibration graph: from 0.2 μM‐ 15 μM LEV and 15 μM‐ 355 μM for levofloxacin, and very low detection limit of 97 nM were achieved with amperometry. Selectivity of the method developed was proven in the presence of possible interfering substances and the method was successfully employed for levofloxacin detection in pharmaceutical tablet and synthetic urine sample.
Single Nickel Atom Catalysts Enable Fast Polysulfide Redox for Safe and Long‐Cycle Lithium–Sulfur Batteries
Authors: Ma Yuhong , Wu Tongwei , Jiao Yu , Wang Fan , Chen Bo , Yan Yichao , Hu Anjun , Li Yinuo , Fan Yuxin , He Miao , Hu Yin , Li Yaoyao , Lei Tianyu , Zhang Yanning , Chen Wei , Huang Ming , Zhu Jun , Li Fei 
Published: November 2022

AbstractLithium–sulfur (Li–S) batteries have attracted great interest due to their low cost, high theoretical energy density, and environmental friendliness. However, the sluggish conversion of lithium polysulfides (LiPS) to S and Li2S during the charge/discharge process leads to unsatisfactory rate performance of lower to 0.1 C (1 C = 1675 mA g−1) especially for Li‐S pouch batteries, thus hindering their practical applications in high power batteries. Here, well‐defined and monodispersed Ni single‐atom catalysts (SACs) embedded in highly porous nitrogen‐doped graphitic carbons (NiSA‐N‐PGC) are designed and synthesized to form Ni–N4 catalytic sites at the atomic level. When serving as a bifunctional electrocatalyst, the Ni−N4 catalytic sites cannot only promote the interfacial conversion redox of LiPS by accelerating the transformation kinetics, but also suppress the undesirable shuttle effect by immobilizing LiPS. These findings are verified by both experimental results and DFT theoretical calculations. Furthermore, Li ions show low diffusion barrier on the surface of Ni−N4 sites, resulting in enhanced areal capacity of batteries. As a result, the Li–S battery delivers stable cycling life of more than 600 cycles with 0.069% capacity decay per cycle at a rate of 0.5 C. More importantly, the Li–S pouch cells with NiSA‐N‐PGC show an initial capacity of 1299 mAh g−1 at a rate of 0.2 C even with high sulfur loading of 6 mg cm−2. This work opens up an avenue for developing single‐atom catalysts to accelerate the kinetic conversion of LiPS for highly stable Li–S batteries.
Crocodile‐Skin‐Inspired Omnidirectionally Stretchable Pressure Sensor
Authors: Lee Giwon , Son Jonghyun , Kim Daegun , Ko Hyeon Ju , Lee Seung Goo , Cho Kilwon 
Published: November 2022

AbstractStretchable pressure sensors are important components of multimodal electronic skin needed for potentializing numerous Internet of Things applications. In particular, to use pressure sensors in various wearable/skin‐attachable electronics, both high deformability and strain‐independent sensitivity must be realized. However, previously reported stretchable pressure sensors cannot meet these standards because they exhibit limited stretchability and nonuniform sensitivity under deformation. Herein, inspired by the unique sensory organ of a crocodile, an omnidirectionally stretchable piezoresistive pressure sensor made of polydimethylsiloxane (PDMS)/silver nanowires (AgNWs) composites with microdomes and wrinkled surfaces is developed. The stretchable pressure sensor exhibits high sensitivity that changes negligibly even under uniaxial and biaxial tensile strains of 100% and 50%, respectively. This behavior is attributed to the microdomes responsible for detecting applied pressures being weakly affected by tensile strains, while the isotropic wrinkles between the microdomes deform to effectively reduce the external stress. In addition, because the device comprises all PDMS‐based structures, it exhibits outstanding robustness under repeated mechanical stimuli. The device shows strong potential as a wearable pressure sensor and an artificial crocodile sensing organ, successfully detecting applied pressures in various scenarios. Therefore, the pressure sensor is expected to find applications in electronic skin for prosthetics and human–machine interface systems.
Delivering unexpected news to pregnant women and their attending family: Is sonographer training adequate? A narrative review
Authors: English Kolbee , Spurway Jacqueline , Quinton Ann , Alphonse Jennifer 
Published: November 2022

AbstractDelivering unexpected news is a common task many sonographers face within the clinical setting. Research has shown sonographers do not feel equipped to break unexpected news to pregnant women and their families. The aim of this study was to review current national and international literature to determine whether sonographers receive sufficient training to deliver unexpected news in the obstetric setting and the types of training individuals had received. Keywords were searched using PubMed, Google Scholar and Central Queensland University library. A total of 22 articles were selected for discussion and four main themes were identified during thematic analysis: (1) sonographers felt underprepared to deliver unexpected news, (2) sonographers felt training was or would be beneficial in delivering unexpected news, (3) a standard training protocol and guidelines should be implemented and (4) training and preparation to deliver unexpected news can improve patient care and satisfaction. Improved communication and patient care could be achieved with the implementation of standard guidelines and training, within universities or via professional associations to ensure sonographers are prepared to deliver unexpected news.