bluuebunny/crossref_metadata_2025 huggingface dataset:
Extended Walfisch‐Bertoni Propagation Model to Cover Short Range and Millimeter‐Wave Bands
Authors: Yamada Wataru , Sasaki Motoharu , Kita Naoki
Published: December 2020

Extending the frequency range of the Walfisch‐Bertoni (W‐B) model, which is a representative theory‐based model, was investigated. To extend the W‐B model, three changes to the original W‐B model were made: (i) remodeling over rooftop path, (ii) introducing a slant path, and (iii) modeling of multiple reflections between buildings. To validate the proposed model, propagation loss predicted by the model was compared with measurement results. Comparison with the measurement results shows that root mean square errors of propagation loss predicted by the proposed model are 5.8 dB for radiowave frequency of 2.2 GHz, 6.6 dB for 5.2 GHz, and 3.3 dB for 26.4 GHz. It is therefore concluded that the proposed model has can achieve high estimation accuracy for all measured frequency bands.
A Drone‐Borne Method to Jointly Estimate Discharge and Manning's Roughness of Natural Streams
Authors: Bandini Filippo , Lüthi Beat , Peña‐Haro Salvador , Borst Chris , Liu Jun , Karagkiolidou Sofia , Hu Xiao , Lemaire Grégory Guillaume , Bjerg Poul L. , Bauer‐Gottwein Peter
Published: December 2020

Image cross‐correlation techniques, such as particle image velocimetry (PIV), can estimate water surface velocity (v
surf) of streams. However, discharge estimation requires water depth and the depth‐averaged vertical velocity (U

m
). The variability of the ratio U

m
/v
surf introduces large errors in discharge estimates. We demonstrate a method to estimate v
surf from Unmanned Aerial Systems (UASs) with PIV technique. This method does not require any ground control point (GCP): the conversion of velocities from pixels per frame into length per time is performed by informing a camera pinhole model; the range from the pinhole to the water surface is measured by the drone‐borne radar. For approximately uniform flow, U

m
is a function of the Gauckler‐Manning‐Strickler coefficient (K

s
) and v
surf. We implement an approach that can be used to jointly estimate K

s
and discharge by informing a system of two unknowns (K

s
and discharge) and two nonlinear equations: i) Manning's equation and ii) mean‐section method for computing discharge from U

m
. This approach relies on bathymetry, acquired in situ a priori, and on UAS‐borne v
surf and water surface slope measurements. Our joint (discharge and K

s
) estimation approach is an alternative to the widely used approach that relies on estimating U

m
as 0.85·v
surf. It was extensively investigated in 27 case studies, in different streams with different hydraulic conditions. Discharge estimated with the joint estimation approach showed a mean absolute error of 19.1% compared to in situ discharge measurements. K

s
estimates showed a mean absolute error of 3 m1/3/s compared to in situ measurements.
Mesoscopic theory of defect ordering–disordering transitions in thin oxide films
Authors: Morozovska Anna N. , Eliseev Eugene A. , Karpinsky Dmitry V. , Silibin Maxim V. , Vasudevan Rama , Kalinin Sergei V. , Genenko Yuri A.
Published: December 2020

Ordering of mobile defects in functional materials can give rise to fundamentally new phases possessing ferroic and multiferroic functionalities. Here we develop the Landau theory for strain induced ordering of defects (e.g. oxygen vacancies) in thin oxide films, considering both the ordering and wavelength of possible instabilities. Using derived analytical expressions for the energies of various defect-ordered states, we calculated and analyzed phase diagrams dependence on the film-substrate mismatch strain, concentration of defects, and Vegard coefficients. Obtained results open possibilities to create and control superstructures of ordered defects in thin oxide films by selecting the appropriate substrate and defect concentration.
Postpartum mood among universally screened high and low socioeconomic status patients during COVID-19 social restrictions in New York City
Authors: Silverman Michael E. , Burgos Laudy , Rodriguez Zoe I. , Afzal Omara , Kalishman Alyssa , Callipari Francesco , Pena Yvon , Gabay Ruth , Loudon Holly
Published: December 2020

The mental health effects of the Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) and the Coronavirus Disease 2019 (COVID-19) pandemic on postpartum women are of increasing concern among mental health practitioners. To date, only a handful of studies have explored the emotional impact of the pandemic surrounding pregnancy and none have investigated the consequence of pandemic-related social restrictions on the postpartum mood of those living among different socioeconomic status (SES). All postpartum patients appearing to the Mount Sinai Health System for their postpartum appointment between January 2, 2020 and June 30, 2020, corresponding to before and during pandemic imposed social restrictions, were screened for mood symptomatology using the Edinburgh Postnatal Depression Scale (EPDS). Each patient’s socioeconomic status (high/low) was determined by their location of clinical service. A total of 516 postpartum patients were screened. While no differences in EPDS scores were observed by SES prior to social restrictions (U = 7956.0, z = − 1.05, p = .293), a significant change in mood symptomatology was observed following COVID-19 restrictions (U = 4895.0, z = − 3.48, p < .001), with patients living in lower SES reporting significantly less depression symptomatology (U = 9209.0, z = − 4.56, p < .001). There was no change in symptomatology among patients of higher SES (U = 4045.5, z = − 1.06, p = .288). Postpartum depression, the most common complication of childbearing, is a prevalent, cross-cultural disorder with significant morbidity. The observed differences in postpartum mood between patients of different SES in the context of temporarily imposed COVID-19-related social restrictions present a unique opportunity to better understand the specific health and social support needs of postpartum patients living in urban economic poverty. Given that maternal mental illness has negative long-term developmental implications for the offspring and that poor mental health reinforces the poverty cycle, future health policy specifically directed towards supporting postpartum women living in low SES by ameliorating some of the early maternal burdens associated with balancing employment-family-childcare demands may assist in interrupting this cycle while simultaneously improving the long-term outcomes of their offspring.
Blocking PDGF-CC signaling ameliorates multiple sclerosis-like neuroinflammation by inhibiting disruption of the blood–brain barrier
Authors: Zeitelhofer Manuel , Adzemovic Milena Z. , Moessinger Christine , Stefanitsch Christina , Strell Carina , Muhl Lars , Brundin Lou , Fredriksson Linda , Olsson Tomas , Eriksson Ulf , Nilsson Ingrid
Published: December 2020

Disruption of blood–brain barrier (BBB) integrity is a feature of various neurological disorders. Here we found that the BBB is differently affected during the preclinical, progression and remission phase of experimental autoimmune encephalomyelitis (EAE), an animal model of multiple sclerosis (MS). We have identified an upregulation of pro-inflammatory and pro-angiogenic factors in the BBB transcriptome and down-regulation of endothelial tight junction members coinciding with elevated BBB leakage specifically during the progression phase. These changes were antagonized by blocking PDGFRα signaling with the small tyrosine kinase inhibitor imatinib. Moreover, targeting the PDGFRα ligand PDGF-CC using a neutralizing antibody, facilitated recovery of BBB integrity and improvement of EAE symptoms. Intracerebroventricular injection of PDGF-CC induced upregulation, whereas blocking PDGF-CC during EAE led to downregulation ofTnfaandIl1aat the BBB. Our findings suggest that blocking PDGF-CC counteracts fundamental aspects of endothelial cell activation and disruption of the BBB by decreasingTnfaandIl1aexpression. We also demonstrate that both PDGF-CC and its receptor PDGFRα were upregulated in MS lesions indicating that blocking PDGF-CC may be considered a novel treatment for MS.
Tunable phosphate-mediated stability of Ce3+ ions in cerium oxide nanoparticles for enhanced switching efficiency of their anti/pro-oxidant activities
Authors: Naganuma Tamaki
Published: December 2020

Phosphate anions adsorbed on Ce3+ ions in cerium oxide nanoparticles enhanced switching efficiency of their superoxide dismutase (SOD) mimetic activities.
Thermoplastic polyurethane with controllable degradation and critical anti-fouling properties
Authors: Wang Huifeng , Liu Xuan , Christiansen Daniel Edward , Fattahpour Seyyedfaridoddin , Wang Kun , Song Haiqing , Mehraeen Shafigh , Cheng Gang
Published: December 2020

Zwitterionic thermoplastic polyurethanes show controllable degradability, superior anti-fouling property, and enhanced mechanical properties. The degradable carboxybetaine diol significantly improves the elasticity and leads to tunable degradation of the materials.
Smart supramolecular nanofibers and nanoribbons from uniform amphiphilic azobenzene oligomers
Authors: Li Lishan , Zhang Jiandong , Liu Min , Shi Xianheng , Zhang Wei , Li Yiwen , Zhou Nianchen , Zhang Zhengbiao , Zhu Xiulin
Published: December 2020

A series of smart 1D nanostructures were fabricated by multiple supramolecular self-assembly of uniform azobenzene amphiphilic oligomers with tunable molecular weight and side chain functionality.
Choline phosphate lipid insertion and rigidification of cell membranes for targeted cancer chemo-immunotherapy
Authors: Li Shengran , Mei Weikang , Wang Xiaozhen , Jiang Sangni , Yan Xinxin , Liu Sanrong , Yu Xifei
Published: December 2020

Choline phosphate lipid (CP-Lip) targeted insertion into cancer cell membranes is carried out to reduce membrane fluidity greatly, thus weakening the metabolism, reproduction, and migration of cancer cells.
Water adsorption fingerprinting of structural defects/capping functions in Zr–fumarate MOFs: a hybrid computational-experimental approach
Authors: Mileo Paulo G. M. , Cho Kyung Ho , Chang Jong-San , Maurin Guillaume
Published: December 2020

A computational-experimental hybrid strategy revealing the water adsorption isotherm as a fingerprint of the nature and concentration of structural defect/capping groups exhibited by MOF adsorbents.
New Pd–Fe ferrocenyl antiparasitic compounds with bioactive 8-hydroxyquinoline ligands: a comparative study with their Pt–Fe analogues
Authors: Rivas Feriannys , Medeiros Andrea , Quiroga Cristina , Benítez Diego , Comini Marcelo , Rodríguez-Arce Esteban , Machado Ignacio , Cerecetto Hugo , Gambino Dinorah
Published: December 2020

Compounds displayed activity against T. brucei. A search of QSAR based on 18 Pt(ii)/Pd(ii) complexes was performed. A study in infected mice of the hit compound showed lack of acute toxicity and anti-proliferative effects that extend animal survival.
Recent advances toward environment-friendly photodetectors based on lead-free metal halide perovskites and perovskite derivatives
Authors: Li Ying , Shi Zhifeng , Liang Wenqing , Ma Jingli , Chen Xu , Wu Di , Tian Yongtao , Li Xinjian , Shan Chongxin , Fang Xiaosheng
Published: December 2020

We present a review of the recent advances in environment-friendly photodetectors based on lead-free metal halide perovskites and perovskite derivatives.
Ferroelectric polymer-based artificial synapse for neuromorphic computing
Authors: Kim Sungjun , Heo Keun , Lee Sunghun , Seo Seunghwan , Kim Hyeongjun , Cho Jeongick , Lee Hyunkyu , Lee Kyeong-Bae , Park Jin-Hong
Published: December 2020

Recently, various efforts have been made to implement synaptic characteristics with a ferroelectric field-effect transistor (FeFET), but in-depth physical analyses have not been reported thus far.
Highly efficient and continuous triboelectric power harvesting based on a porous β-phase poly(vinylidene fluoride) aerogel
Authors: Wang Minmin , Liu Weiqun , Shi Xu , Pan Jinyang , Zhou Bing , Wang Jin , Sun Tongming , Tang Yanfeng
Published: December 2020

A TENG with high output performance containing a high surface area polymeric β-phase PVDF aerogel is constructed. The obtained TENG can easily lights up 30 blue LEDs, which can be used as a self-powered human motion sensor.
A recyclable tetracycline imprinted polymeric SPR sensor: in synergy with itaconic acid and methacrylic acid
Authors: Nawaz Tehseen , Ahmad Muhammad , Yu Jieying , Wang Shiqi , Wei Tianxin
Published: December 2020

A novel tetracycline (TC) imprinted polymer was prepared in visible light via synergy of dual functional group monomers methacrylic acid (MAA) and itaconic acid (IA) for selective detection of TC in urine and milk samples.
The role of synthetic oils in controlling hydrogen permeation of rolling/sliding contacts
Authors: Tanaka Hiroyoshi , Ratoi Monica , Sugimura Joichi
Published: December 2020

Hydrogen content and wear rate in bearing steel under rolling contact depend on the base oil type and the composition of tribofilm they generate on the wear track.
Stromal cell-derived factor loaded co-electrospun hydrophilic/hydrophobic bicomponent membranes for wound protection and healing
Authors: Augustine Robin , ur Rehman Syed Raza , K. S. Joshy , Hasan Anwarul
Published: December 2020

Co-electrospun membranes containing SDF1 with micro/nano topography and hydrophilic/hydrophobic surface properties promote the migration and proliferation of mammalian cells that are relevant to wound healing.
Bromodomain and BET family proteins as epigenetic targets in cancer therapy: their degradation, present drugs, and possible PROTACs
Authors: Muddassir Mohd. , Soni Kunjal , Sangani Chetan B. , Alarifi Abdullah , Afzal Mohd. , Abduh Naaser A. Y. , Duan Yongtao , Bhadja Poonam
Published: December 2020

Alteration in the pattern of epigenetic marking leads to cancer, neurological disorders, inflammatory problemsetc.
Nanoporous fluorescent sensor based on upconversion nanoparticles for the detection of dichloromethane with high sensitivity
Authors: Wang Haiyan , Zhan Shiping , Wu Xiaofeng , Wu Lingqiong , Liu Yunxin
Published: December 2020

We report a highly sensitive nanoporous fluorescence sensor based on core/shell upconversion nanoparticles (UCNPs) for the detection of dichloromethane. UCNPs are deposited on porous anodic alumina oxide templates to form a thin film-like gas sensor.
New poly-imidazolium–triazole particles by CuAAC cross-linking of calix[4]arene bis-azide/alkyne amphiphiles – a prospective support for Pd in the Mizoroki–Heck reaction
Authors: Burilov Vladimir , Garipova Ramilya , Mironova Diana , Sultanova Elza , Bogdanov Ilshat , Ocherednyuk Evgeny , Evtugyn Vladimir , Osin Yuri , Rizvanov Ildar , Solovieva Svetlana , Antipin Igor
Published: December 2020

A new supramolecular approach to the formation of polytriazole–imidazolium particles, promising supports for catalysis, based on self-assembly of amphiphilic bis-azides and bis alkynes and their linkage using CuAAC is presented.
A quantum algorithm for spin chemistry: a Bayesian exchange coupling parameter calculator with broken-symmetry wave functions
Authors: Sugisaki Kenji , Toyota Kazuo , Sato Kazunobu , Shiomi Daisuke , Takui Takeji
Published: December 2020

A quantum algorithm “Bayesian exchange coupling parameter calculator with broken-symmetry wave function (BxB)” enables us to calculate Heisenberg exchange coupling parameter J without inspecting total energies of individual spin states, within 1 kcal mol−1 of energy tolerance.
Photo-induced bond breaking during phase separation kinetics of block copolymer melts: a dissipative particle dynamics study
Authors: Singh Ashish Kumar , Chauhan Avinash , Puri Sanjay , Singh Awaneesh
Published: December 2020

We studied phase separation kinetics of block copolymer melts while passing them through alternate photo-induced bond breaking (on) and recombination (off) reaction cycles, and discussed its effect on evolution morphologies, scaling functions, and length.
Ag-Induced metallogel based on cyclooctatetrathiophene: structural characterization and stimuli-responsive properties
Authors: Tian Yu , Wang Chenglong , Wang Guangxia , Xu Li , Wang Hua
Published: December 2020

A new supramolecular metallogel was constructed by connecting saddle-shaped COTh bearing pyridine groups with AgBF4, and exhibited outstanding multiple-stimuli-responsive properties upon addition of halogen ions, acetonitrile or H2O.
Three-dimensional self-supported CuCo2O4 nanowires@NiO nanosheets core/shell arrays as an oxygen electrode catalyst for Li–O2 batteries
Authors: Song Kefan , Ai Wen , Zhang Yuan , Zeng Yating , Yu Yawei , Qiao Handan , Liu Zeyu , Shen Xiaodong , Hu Xiaohui , Hu Xiulan
Published: December 2020

Designing an oxygen electrode catalyst can significantly improve the performance of Li–O2 batteries.
Nanofiber hybrid membranes: progress and application in proton exchange membranes
Authors: Zhao Guodong , Zhao Huijuan , Zhuang Xupin , Shi Lei , Cheng Bowen , Xu Xianlin , Yin Yan
Published: December 2020

Proton-conducting nanofiber hybrid membranes (PC-NFHMs) as promising candidates, are widely used for proton exchange membrane fuel cells (PEMFCs), combining the properties and some synergism from interactions between nanofibers and the polymer matrix.
Nanozymes go oral: nanocatalytic medicine facilitates dental health
Authors: Chen† Xiaohang , Xing† Helin , Zhou Zilan , Hao Yujia , Zhang Xiaoxuan , Qi Feng , Zhao Jing , Gao Lizeng , Wang Xing
Published: December 2020

Nanozymes, a kind of nanomaterial with enzyme-like activity, overcomes many shortcomings of natural enzymes and gradually shines in the field of stomatology.
Application of stimuli-responsive FRET behavior toward cyanide detection in a photo-switchable [2]pseudorotaxane polymer containing the BODIPY donor and the merocyanine acceptor
Authors: Gouda Chinmayananda , Barik Debashis , Maitra Chandrima , Liang Kai-Chieh , Ho Feng-Cheng , Srinivasadesikan Venkatesan , Chandran Sarala , Wu Shu-Pao , Lin Ming-Chang , Lin Hong-Cheu
Published: December 2020

The bi-fluorophoric host–guest [2]pseudorotaxane polymer containing merocyanine-based guest (open form) showed sensitive cyanide detections and useful bio-imaging applications in living cells via FRET-OFF processes to recover green donor emissions.
High-efficiency microwave absorbing performance originating from sufficient magnetic exchange coupling interaction and impressive dielectric loss
Authors: Fang Gang , Liu Chuyang , Yang Yun , Peng Kangsen , Cao Yufan , Xu Guoyue , Zhang Yujing
Published: December 2020

The Cu/Fe3O4/BaZr0.6Ni0.6Fe10.8O19 composites with sufficient magnetic exchange coupling interaction and impressive dielectric loss possess optimal microwave absorbing performance.
RNA transfer through tunneling nanotubes
Authors: Haimovich Gal , Dasgupta Sandipan , Gerst Jeffrey E.
Published: December 2020

It was already suggested in the early ‘70's that RNA molecules might transfer between mammalian cells in culture. Yet, more direct evidence for RNA transfer in animal and plant cells was only provided decades later, as this field became established. In this mini-review, we will describe evidence for the transfer of different types of RNA between cells through tunneling nanotubes (TNTs). TNTs are long, yet thin, open-ended cellular protrusions that are structurally distinct from filopodia. TNTs connect cells and can transfer many types of cargo, including small molecules, proteins, vesicles, pathogens, and organelles. Recent work has shown that TNTs can also transfer mRNAs, viral RNAs and non-coding RNAs. Here, we will review the evidence for TNT-mediated RNA transfer, discuss the technical challenges in this field, and conjecture about the possible significance of this pathway in health and disease.
On bipartite consensus of linear MASs with input saturation over directed signed graphs: Fully distributed adaptive approach
Authors: Nan Xiaoya , Lv Yuezu , Duan Zhisheng
Published: December 2020

This paper studies the bipartite consensus problem with input saturation for general linear represents multi‐agent systems (MASs) with signed digraphs. Based on relative state information among neighbour agents, distributed adaptive protocols and a compensation observer are proposed, wherein both leaderless bipartite consensus and tracking bipartite consensus problems are addressed. For the case only relative output information is available, observer‐based distributed adaptive protocols are also designed, where for each agent, a local observer is given to estimate signed consensus error and a distributed observer is presented to achieve bipartite consensus and generate control input and a compensation observer is designed to handle input saturation. Simulation illustrations are given to explain the feasibility. The control protocols presented in this article depend on only local relative state or output information, without any eigenvalue information of Laplacian matrices associated with signed digraphs, which can be practically used for each agent in a fully distributed way.
Optimal energy allocation for remote state estimate under Denial‐of‐Service attack
Authors: Ye Dan , Wei Jiang
Published: December 2020

This paper considers an energy‐constrained sensor power allocation problem for remote estimation under Denial‐of‐Service attack. Due to power constraints, the sensor needs to make a decision on how much power it should employ to optimise the state estimation performance under Denial‐of‐Servic attacks without using real‐time acknowledgment information. Different from the existing works concerning non‐zero power value with discrete values or one power value, the authors consider the multilevel continuous‐valued energy allocation policy containing zero power value in this work. By analysing the effects on performance index under different energy allocation policies, an optimal off‐line power scheduling policy with non‐decreasing structure is derived. To obtain the optimal power scheduling sequences, the authors formulate the problem as non‐linear programming after analysing the probability distribution of the estimation error covariance matrix. Moreover, the two power values energy allocation policy is investigated as a special case. At last, simulation examples are presented to verify the effectiveness of their theoretical results.
Exploiting buck–boost duality in dual active bridge modular multilevel converters to achieve high DC step ratios
Authors: Kung Sunny , Liu Dalu , Perera Chatumal , Haji Moosa Moghimi , Salmon John , Kish Gregory
Published: December 2020

A previously unidentified duality between buck and boost configured dc‐ac modular multilevel converters (MMCs) is firstly revealed. Armed with this insight, a new dual‐active‐bridge (DAB)‐MMC is proposed for high‐voltage dc (HVDC)‐to‐medium‐voltage dc (MVDC) power conversion that utilizes cascaded buck and boost dc–ac stages to obtain high dc step ratios. Single‐phase and three‐phase variants are presented. When compared with the conventional DAB‐MMC solution for the same dc step ratio, both the single‐phase and three‐phase topologies offer reduced MVDC side transformer winding current stresses, while the three‐phase topology also yields reduced MVDC side MMC submodule current stresses. The former is achieved by having the freedom to design the transformer with a lower turns ratio, and the latter is achieved due to the inherent paralleling of submodules on the MVDC side of the converter. Analysis of the three‐phase topology reveals its low‐voltage side transformer winding current stresses can be reduced by a factor of 3.27. A generalized mathematical model of the proposed buck–boost DAB‐MMC is derived and used to propose a dynamic controller for both the single‐phase and three‐phase topologies. Real‐time simulations obtained from a real‐time digital simulator system that incorporates an FPGA‐based controller for the valve firing controls validate the proposed buck–boost DAB‐MMC operation and dynamic controls.
Hybrid‐fed shared aperture antenna array for X/K‐band airborne synthetic aperture radar applications
Authors: Kothapudi Venkata Kishore , Kumar Vijay
Published: December 2020

The design of X/K‐band shared aperture antenna (SAA) single‐linear polarized K‐band, dual‐polarized (linear/circular) X‐band 36‐elements (6×6) planar array antenna with high gain, and low cost for airborne synthetic aperture radar systems is presented. To reduce the complexity and size of the feed networks, the concept of series‐feed centre‐fed open stub array with Chebyshev amplitude distribution of −25 dB side‐lobe levels (SLL) are employed for K‐band design. Two typical frequencies, X‐band and K‐band of 9.65  and 21 GHz, are chosen (frequency ratio of 1:2.176) in this proposed SAA design on a single‐layer printed circuit board. For K‐band design, SLL can be controlled by Chebyshev distribution. The amplitude is controlled by the width of the individual patch in the linear array with left and right symmetries. A 50‐Ω microstrip line with 0.7λ spacing is used in between the patches for the ±25° scan angle requirement. The measured results are consistent with the simulations and provide a matching impedance bandwidth of 10.36/1.45% at X/K‐bands, respectively. The array also has a high aperture efficiency of more than 85%, SLL of (X/K‐bands: −18.9/−25 dB), and gain of (X/K‐bands: 24.2/17.4 dBi).
Pattern‐reconfigurable antenna in azimuth plane using SP3T reconfigurable switching network
Authors: Prakash Tarun , Chaudhary Raghvendra Kumar , Gangwar Ravi Kumar
Published: December 2020

This paper presents a new pattern‐reconfigurable antenna. This antenna has been designed, fabricated, and measured for 2.45 GHz band application. It provides six different radiation patterns in the azimuth plane at the same angle interval. First, a new single‐pole three‐throw switching network with one input and three outputs has been built on the circuit simulator and afterward validated by structural simulation. This reconfigurable switching network provides six switching conditions by the combination of turning ‘ON’ and ‘OFF’ states of the used four radio frequency p‐i‐n diode switches. Second, three curved printed dipole antennas are designed with an equal interval of 120° in the azimuth plane. Finally, switching network and curved printed dipole antennas are simultaneously simulated for 2.45 GHz band applications followed by fabrication. Maximum half‐power beamwidth and average gain are obtained as 110° and 4 dBi, respectively, and the radiation efficiency is always better than 90.2%.
Spiridion Kanellis, un plagiaire audacieux du XIXe siècle
Authors: Gautron Laurent
Published: December 2020

En 1883, un cas de plagiat qualifié d’audacieux était révélé lors d’une séance de la Société de biologie de Paris. Cet article discute les détails de ce plagiat et l’identité de son auteur, un médecin du nom de Spiridion Kanellis.
Hydrothermal synthesis of ZnTa2O6, ZnNb2O6, MgTa2O6and MgNb2O6pseudo-binary oxide nanomaterials with anticorrosive properties
Authors: Birdeanu Mihaela , Vaida Mirela , Fagadar-Cosma Eugenia
Published: December 2020

ZnTa2O6, ZnNb2O6, MgTa2O6and MgNb2O6pseudo-binary oxide nanomaterials were synthesized through the hydrothermal method at 250 °C. Obtained materials were characterized by X-ray diffraction, UV-VIS measurements, field emission-scanning electron microscopy and atomic force microscopy techniques. XRD results show that the single phases of ZnTa2O6, ZnNb2O6, MgTa2O6and MgNb2O6pseudo-binary oxides nanomaterials were obtained, no thermal treatment being required. The values for the optical band gap of each material are settled in the range 3.60–3.80 eV. The anticorrosion characteristics of the obtained compounds were also evaluated after deposition on carbon steel in 0.5 M Na2SO4media by open circuit potential measurements and potentiodynamic polarization technique with Tafel representation. The inhibition efficiency of pseudo-binary oxides deposited on carbon steel electrode was in the range 37–59.17%, promising for improvement of the anticorrosion properties.
New aspects of fractional Bloch model associated with composite fractional derivative
Authors: Singh Jagdev , Kumar Devendra , Baleanu Dumitru
Published: December 2020

This paper studies a fractional Bloch equation pertaining to Hilfer fractional operator. Bloch equation is broadly applied in physics, chemistry, nuclear magnetic resonance (NMR), magnetic resonance imaging (MRI) and many more. The sumudu transform technique is applied to obtain the analytic solutions for nuclear magnetizationM= (Mx,My,Mz). The general solution of nuclear magnetizationMis shown in the terms of Mittag-Leffler (ML) type function. The influence of order and type of Hilfer fractional operator on nuclear magnetizationMis demonstrated in graphical form. The study of Bloch equation with composite fractional derivative reveals the new features of Bloch equation. The discussed fractional Bloch model provides crucial and applicable results to introduce novel information in scientific and technological fields.
Approaches to the values and anti-values meaning description
Authors: Ilyina Violette
Published: December 2020

Chronopsycholinguistics approach to the values and anti-values study allows us to describe the values components meaning in a certain historical period and its influence on the language consciousness images perception and interpretation in different cultures. The consciousness is studied at 3 levels (the public consciousness official level, the intermediate level of social consciousness, the common consciousness level).
Linguistic analysis in politically correct discourse (on the English language media content)
Authors: Melnikova Kseniya , Guslyakova Alla , Giuliodori Lucio
Published: December 2020

The problem of the research is the insufficient study of political correctness (PC) in the intercultural and linguistic aspects, as well as the urgent need to establish its status in the modern integrated culture. The relevance of the study is due to there is no unified approach to the analysis of the concept of PC in the political sphere. There is a special ideological cultural and behavioral linguistic tolerant tendency in the contrary to expressions subjected to public ostracism due to the fact that the speeches of public figures contain too many politically incorrect statements. Thus, the “listener” may have an internal protest against the use of PC vocabulary in everyday life, although its use is forced upon society by all types of media. The study is touch upon the analysis of the vast corpus of statements by US President D. Trump on Twitter, as well as other open Internet sources. The problem of studying PC was dealt with as Russian scientists, such as A.B. Ostroukh, M. Yu. Palazhchenko, Yu.L. Gumanova, S.G. - Ter Minasova, L.V. Tsurikova and others, as well as their foreign colleagues: Paul Berman, Deborah Cameron and others. The aim of research is to attempt to describe the PC category in terms of cultural, behavioral and linguistic perspectives. In accordance with the tasks set for the study the following methods were used: descriptive method, methods of distributive, component, quantitative and comparative analysis. The results could be used in educational and methodological activities as well as preparation of materials on cultural linguistics, lexicology, linguistic stylistics submissions, etc. The further research course plans to establish the relationship between the occasional euphemistic vocabulary.
Teaching Writing In A Foreign Language To Law Students Using Authentic Internet Resources
Authors: Dumina Evgenia , Suarez Cuadros Simon
Published: December 2020

The article is devoted to the development of foreign language writing skills of students of the direction of training “Jurisprudence” in the framework of professional education. The features of the process of teaching written business communication in a foreign language as an important component of the professional competence of a practicing lawyer are shown. The study suggests that with the help of authentic Internet resources, optimal conditions are created not only for acquaintance with written forms of communication adopted in the professional legal community: within the framework of the discipline “Foreign language in the field of professional communication” intercultural foreign language communicative competence of students is formed and improved.
The Use of a Blog for the Development of Intercultural Communicative Competence: the case of Tunisian and American Students
Authors: Abid Nadia , Moalla Asma , Omidvar Iraj
Published: December 2020

This paper is a report on a three-month telecollaboration between two groups of students studying in ISEAH of Sbeitla in Tunisia and SPSU, Atlanta, GA, in the USA. By bringing together students from two culturally and linguistically different environments, the telecollaboration aims at helping them communicate interculturally and raise their intercultural awareness and understanding. By means of a blog, students exchanged, discussed, and compared information about their cultures in the form of stories of which they are the main characters. The telecollaboration was evaluated by means of a questionnaire inquiring about students’ satisfaction with the use of the blog, the knowledge they gained of the foreign culture, their attitudes toward it, and the intercultural communicative skills acquired. The findings revealed participants’ satisfaction with the use of the blog as a means of communication and intercultural learning. It was also found out that students’ development of intercultural communicative competence manifested in their knowledge of the other culture and people, a change in their attitudes towards them, an ability to communicate with culturally different people, and an increased awareness of themselves and the other group.
Potential of ICT in Teaching English as a Foreign Language Focused on Autistic Spectrum Learners
Authors: Jelínková Beáta
Published: December 2020

The number of children with Autistic Spectrum Disorders (ASDs) educated under mainstream school system is still raising. Since English is a compulsory subject for every school child in Slovakia, students with ASDs also belong to the group of English language learners. Thereupon causing worries to teachers and calling for a necessity of a wider concept. The purpose of the study is to help the ASDs learners and their teachers to acquire the curriculum under the virtue of ICT. Data were collected via the Case Study as the main research, based on teacher´s daily experience in teaching English to ASDs children. Results are presented in the form tables and figures and prove the expectation to meet special educational needs of ASDs.
Mechanisms of intersemiotic translation
Authors: Vashunina Irina , Zimina Maria
Published: December 2020

The article presents the results of an experimental study of the perception of creolized texts (verbal texts with illustrations), which aimed to detect regular correlations of verbal categories (adjectives cold, calm, light, bright, pleasant) and certain image parameters, as well as to characterize the mechanisms of intersemiotic translation. The study was conducted using the method of semantic differential, which involved evaluating creolized texts on five-point scales. As a result, the semantics of visual characteristics was determined, and the possibilities of visual representation of verbal characteristics were identified. The mechanisms of intersemiotic translation are characterized.
Intricacies of Upper Blepharoplasty in Asian Burden Lids
Authors: Paik Ji Sun , Lee Ji Hyeong , Uppal Sandeep , Choi Woong Chul
Published: December 2020

Differences between Oriental and Caucasian eyelids have been explained in great detail in several reports in the past. The purpose of this article is to discuss the functional aspects of Asian double fold upper blepharoplasty and to present techniques that help to improve both the functional and cosmetic outcomes and satisfaction after surgery. The eyes of Asians are relatively small with thick skin in the eyelids and periorbital area. They typically lack the upper eyelid crease (creating the so-called double eyelid) due to burden factors like thick skin, hypertrophied orbicularis oculi muscle (OOM), submuscular fibroadipose tissue, thick orbital septum, abundant preaponeurotic fat, and lower positioned transverse ligament. Asian eyes may also have a superior visual field defect due to skin overriding the upper lid margin (skin–OOM–fat complex slide down). These burden factors result in the eyelashes appearing short and becoming misdirected and pressed toward the globe, causing functional discomfort. As a compensatory mechanism, Asian people tend to engage the frontalis muscle to lift the eyebrow to help them open their eyes. Along with aesthetic enhancement, double-eyelid surgery in Asian burden lids can improve the functional deficiencies helping the patients to open the eyes more easily. In addition, treatment of the Mongolian fold (medial epicanthal fold), caused by medial hypertrophy of preseptal OOM, augments the surgical results. In this report, we present the appropriate preoperative assessment, surgical technique, and postoperative care that should be employed to achieve consistently good functional and aesthetic outcomes in these patients.
Computed Tomography-Guided Vertebral Biopsy in Suspected Tuberculous Spondylodiscitis: Comparing a New Navigational Tram-Track Technique versus Conventional Method
Authors: Singh Dharmendra Kumar , Sharma Anuradha , Boruah Tankeshwar , Kumar Nishith , Suman Saurabh , Jaiswal Binita
Published: December 2020

Introduction Computed tomography (CT)-guided vertebral biopsy is always recommended for histopathological and microbiological confirmation in cases of tuberculous spondylodiscitis and for antimycobacterial drug sensitivity testing.

Aim To compare the conventional technique and a novel axis-defined tram-track technique of CT-guided vertebral biopsy in suspected tuberculous spondylodiscitis.

Materials and Methods Sixty-seven patients of clinico-radiologically suspected tuberculous spondylodiscitis referred for CT-guided vertebral biopsy were categorized into two groups: “Group A” patients (n = 32) underwent biopsy by conventional technique, and “Group B” patients (n = 35) by axis-defined tram-track technique. The time taken for procedure, radiation exposure, and any procedural complications were recorded for both the groups.

Results A statistically significant difference in procedure time and mean radiation dose was observed between the two groups: a longer procedural time was required in “Group A” (52.5 ± 3.5 minutes) as compared to “Group B” (37.3 ± 3.6 minutes) (p < 0.0001); and mean radiation dose (CTDIvol) in “Group A” and “Group B” was 8.64 ± 1.06 mGy and 5.73 ± 0.71 mGy, respectively (p < 0.0001). However, the difference in complication rate and tissue yield for successful diagnosis of the biopsies in the two groups was found to be statistically insignificant.

Conclusion Axis-defined tram-track technique was found to have a significantly shorter procedural time as well as lower radiation exposure compared to the conventional technique of vertebral biopsy in our study.
Anticoagulation for Patients with Venous Thromboembolism: When is Extended Treatment Required?
Authors: Weitz Jeffrey I. , Prandoni Paolo , Verhamme Peter
Published: December 2020

The need for extended venous thromboembolism (VTE) treatment beyond 3 to 6 months is usually determined by balancing the risk of recurrence if treatment is stopped against the risk of bleeding from continuing treatment. The risk of recurrence, and in turn the decision to extend, can be determined through the nature of the index event. Patients with VTE provoked by surgery or trauma (major transient risk factors) are recommended to receive 3 months of anticoagulation therapy because their risk of recurrence is low, whereas patients with VTE provoked by a major persistent risk factor, such as cancer, or those considered to have “unprovoked” VTE, are recommended to receive an extended duration of therapy based on an established high risk of recurrence. Nonetheless, recent evidence and new guidance identify that this approach fails to consider patients with risk factors classed as minor transient (e.g., impaired mobility and pregnancy) or minor persistent (e.g., inflammatory bowel disease and congestive heart disease). Indeed, the risk of recurrence with respect to VTE provoked by minor persistent risk factors has been demonstrated to be not dissimilar to that of VTE without identifiable risk factors. This review provides an overview of the available data on the risk of recurrence according to the underlying cause of VTE, a critical evaluation of evidence from clinical studies on the available anticoagulants for extended VTE treatment, models of risk prediction for recurrent VTE and bleeding, and guidance on how to apply the evidence in practice.
Facial Transplantation: Complications, Outcomes, and Long-Term Management Strategies
Authors: Shokri Tom , Saadi Robert , Wang Weitao , Reddy Likith , Ducic Yadranko
Published: December 2020

Within the past two decades, vascularized facial composite allotransplantation has evolved into a viable option in the reconstructive surgeons' armamentarium for patients with extensive facial disfigurements. As it has expanded the frontiers of microsurgical reconstructive techniques, facial transplantation has come to garner widespread interest within both the medical community and the general public. The procedure has established itself as an amalgamation of the forefronts of reconstructive microsurgery, immunology, and transplantation science. Therein too lies its complexity as multifaceted scientific developments are met with ethical and social issues. Both patients and physicians are faced with the everlasting challenges of immunosuppression regimens and their inherent complications, long-term aesthetic and functional considerations, the role of revision procedures, and the inevitable psychosocial implications. This article reflects on the medical and surgical advancements in facial transplantation surgery and highlights anticipated future challenges. It aims to encourage discussion regarding anticipated barriers to current practice and suggest future directions as we transition into the next phase of facial allograft transplantation.
Flap Failure and Salvage in Head and Neck Reconstruction
Authors: Wang Weitao , Ong Adrian , Vincent Aurora G. , Shokri Tom , Scott Britney , Ducic Yadranko
Published: December 2020

With advanced head and neck ablative surgery comes the challenge to find an ideal reconstructive option that will optimize functional and aesthetic outcomes. Contemporary microvascular reconstructive surgery with free tissue transfer has become the standard for complex head and neck reconstruction. With continued refinements in surgical techniques, larger surgical volumes, and technological advancements, free flap success rates have exceeded 95%. Despite these high success rates, postoperative flap loss is a feared complication requiring the surgeon to be aware of potential options for successful salvage. The purpose of this article is to review free flap failure and ways to optimize surgical salvage in the scenario of flap compromise.
Influence of a low-Z thin substrate on a microwire hard x-ray source driven by a picosecond laser pulse for point-projection x-ray radiography
Authors: Li Meng-ting , Hu Guang-yue , Huang Lin-gen , Zheng Jian
Published: December 2020

In the point-projection hard x-ray radiography of dense matter, for example, an inertial confinement fusion implosion capsule at stagnation time, a picosecond laser driven gold microwire is used to produce a short pulse point, bremsstrahlung hard x-ray source. The microwire was held by a low-Z CH thin substrate commonly used to promote experimental performance. We explored the influence of the low-Z thin substrate on the microwire bremsstrahlung hard x-ray source via particle-in-cell and Monte Carlo simulations. It was shown that both of the microwires, with or without the low-Z thin substrate, could emit more intense hard x-ray radiation than the radiator buried in the equal-density substrate, which benefited from efficient electron recirculation. The freestanding microwire exhibited further enhanced electron recirculation compared to that with the low-Z thin substrate, while the increased hot electrons were only present for the energetic electrons of >1 MeV. Thus, the freestanding microwire could produce significantly more intense MeV gamma x-ray emission with respect to that with the substrate, but an ignorable increment was exhibited at the softer x-ray emission of 10–200 keV. These results provided valuable insights into the design of backlighter targets in point-projection x-ray radiography, such as a freestanding microwire being preferred in MeV gamma-ray radiography, while the microwire with the CH thin substrate could be used in the 10–200 keV hard x-ray Compton radiography of an implosion capsule.
Ultrawide-bandgap Moiré diamanes based on bigraphenes with the twist angles Θ ∼ 30°
Authors: Chernozatonskii Leonid A. , Demin Victor A. , Kvashnin Dmitry G.
Published: December 2020

Moiré diamanes (Dnθ) based on bigraphenes (BGθ) with a layer rotation angle (θ) of about 30° are considered by ab initio methods. The adsorption of hydrogens or fluorines on the bigraphene surface leads to the formation of interlayer covalent bonds. The resulting structure has only sp3-hybridized atoms, which leads to the appearance of a wide bandgap. Bandgaps of hydrogenated Dn29.4 and Dn27.8 and fluorinated F-Dn29.4 and F-Dn27.8 are 3.6, 3.3, 4.1, and 4.5 eV, respectively, which are larger than the dielectric gaps of ordinary diamanes based on the non-twisted AA- or AB-bigraphenes (≈3 eV). Possible applications of these 2D wide-gap dielectrics were also discussed.
(1 − x)BaTi0.5Mn0.5O3 + (x)Ni0.6Zn0.4Fe1.85Sm0.15O4 composite multiferroics: Analyzing the customizing effect on conductive and magnetic properties of BaTi0.5Mn0.5O3 by substituting Ni0.6Zn0.4Fe1.85Sm0.15O4 at different concentrations
Authors: Esha I. N. , Munny K. N. , Khan M. N. I. , Maria Kazi Hanium
Published: December 2020

Mixed spinel–perovskite multiferroic (1 − x)BaTi0.5Mn0.5O3 + (x)Ni0.6Zn0.4Fe1.85Sm0.15O4 [(1 − x)BTMO + (x)NZFSO] ceramic composites with different concentrations, x = 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, have been prepared by the effective double sintering ceramic method. X-ray diffraction confirms the coexistence of the cubic spinel structure of the ferrimagnetic phase, Ni0.6Zn0.4Fe1.85Sm0.15O4 (NZFSO), and the tetragonal structure of the ferroelectric phase, BaTi0.5Mn0.5O3 (BTMO), in the composites. The theoretical density decreases while the bulk density increases with the substitution of ferrimagnetic NZFSO into ferroelectric BTMO. Scanning electron microscopy shows an increment in the grain size with ferrite doping. Increasing permeability with ferrite doping indicates the enhancement of magnetic properties of the composites. The Cole–Cole plot affirms the contribution of grains, grain boundaries, and electrodes to the resistive properties of the samples. The variation in polarization and magnetization is correlated with the ferrite content. The composite with x = 0.8 has a high saturation magnetization, Ms = 28.67 emu/g, and has a maximum remanent polarization, Pr = 258.123 µC/cm2.