bluuebunny/crossref_metadata_2025_split huggingface dataset:
A Failure to Be Candid
Authors: McGuirl Jennifer 
Published: July 2017

AbstractI was a second‐year neonatal‐perinatal fellow in a meeting between other members of the neonatal intensive care team and parents who had just received devastating news about their planned‐for and highly desired baby, born after what had been an uncomplicated pregnancy. At home, a little sister was waiting to meet her new brother. These conversations are never easy, but this one I found particularly disturbing. John had been born at term via emergency cesarean section after his mother, Muriel, had come for a routine obstetrical visit and reported decreased fetal movement. The obstetrician had detected a very slow fetal heart rate and sent Muriel to the hospital for emergent delivery. John was born floppy, with no respiratory effort. He was resuscitated, but a heart rate was not detected until fifteen minutes after birth. Not until several months later did I discover what had troubled me so much in this family meeting.
Japanese citizens' attitude toward end‐of‐life care and advance directives: A qualitative study for members of medical cooperatives
Authors: Hirayama Yoko , Otani Takashi , Matsushima Masato 
Published: July 2017

AbstractBackgroundJapanese citizens are interested in choosing their own end‐of‐life care, but few have created their own advance directive. This study examined changes among Japanese citizens' attitudes toward end‐of‐life care and advance directives and explored factors that affected these attitudes.MethodsWe conducted five focus groups with 48 participants in 2009 and 2010. All participants were members of health cooperatives in Tokyo.ResultsWe identified many barriers and reasons for creating and writing down advance directives. Experience caring for dying people and having a serious disease affected attitudes toward advance directives. Some participants changed their attitude toward end‐of‐life care by writing their own advance directive.ConclusionsWhen someone is writing advance directives, asking about his/her past experience of caring may be helpful. And learning about or filling out advance directives may help to break down resistance to using these documents.
Model‐order nonlinear subspace reduction of electric machines by means of POD and DEI methods for copper losses calculation
Authors: Al Eit M. , Bouillault F. , Marchand C. , Krebs G. 
Published: July 2017

AbstractThe simulation of electric machines in order to calculate the copper losses is about a time‐dependent electromagnetic problem. When the finite element method associated with a time stepping scheme is used to solve the problem, the solution is strongly linked to initial conditions, among which the most important is the solution at the initial time. Because it is practically chosen as an arbitrary solution, several time‐consuming electrical excitation periods must be simulated therefore to reach finally the steady‐state conditions. The copper losses can be calculated now without any transient components that can affect the credibility of the copper losses amount. This article suggests a model‐order reduction method that benefits from the complete model finite element solution of the first transient electrical period, to calculate the reduced model solution in the subsequent periods using the proper orthogonal decomposition approach combined with the discrete empirical interpolation method. Nevertheless, in case of relatively high frequency excitation, the full reduction of the problem leads to significant imprecision in the amount of copper losses. To improve the accuracy, therefore, a nonlinear subspace model‐order reduction is adopted. It ensures concurrently higher precision and a reduced computational time.
The application of Raman spectroscopy to djerfisherite identification
Authors: Golovin Alexander V. , Goryainov Sergey V. , Kokh Svetlana N. , Sharygin Igor S. , Rashchenko Sergey V. , Kokh Konstantin A. , Sokol Ella V. , Devyatiyarova Anna S. 
Published: July 2017

Raman spectra were acquired from the synthetic cubic K6Fe25S26Cl phase (55.3 wt% Fe) and ten natural djerfisherites K6(Fe,Cu,Ni)25S26Cl with various contents of Fe (from 15.5 to 22.6 atoms per formula unit (apfu)) and Ni + Cu + Co (from 1.4 to 9.0 apfu). The natural samples came from rocks of the Udachnaya, Obnazhennaya and Vtorogodnitsa kimberlite pipes and high‐grade contact marbles near Kochumdek River (Siberian craton, Russia). Diagnostic features of both synthetic and natural djerfisherite Raman spectra can be summarized as follows: the presence of two strong bands at 264–273 and 321–344 cm−1 and from two to five medium/weak bands in the region from 90 to 190 cm−1. Raman spectra of Fe‐rich ((Ni + Cu + Co) < 2.4 apfu) djerfisherite have up to nine bands, whereas the number of Raman bands in spectra of djerfisherite with high impurity concentration ((Ni + Cu + Co) = 8.7–9 apfu) reduces to four. The Raman spectra of djerfisherite enriched in impurities ((Ni + Cu + Co) = 5–9 apfu) are also characterized by broadening and asymmetry of bands in comparison with Ni + Cu + Co‐poor djerfisherite. Experimental Raman spectra of synthetic and natural djerfisherites show good agreement with theoretical spectra calculated using lattice‐dynamical software. The group of bands in the range 90–190 cm−1 is associated with the S–Fe–S bending vibrations in FeS4 tetrahedra and FeS6 octahedra. The band group in the range of 260–350 cm−1 is due to the Fe–S stretching vibrations in both polyhedra. Copyright © 2017 John Wiley & Sons, Ltd.
Vortex‐assisted liquid–liquid microextraction of strontium from water samples using 4′,4″(5″)‐di‐(tert‐butylcyclohexano)‐18‐crown‐6 and tetraphenylborate
Authors: Wang Chin‐Yi , Chang Da‐An , Shen Yuzhou , Sun Yuh‐Chang , Wu Chien‐Hou 
Published: July 2017

AbstractA vortex‐assisted liquid–liquid microextraction method was developed for the chromatographic determination of strontium in aqueous samples. In the method, strontium was complexed with 4′,4″(5″)‐di‐(tert‐butylcyclohexano)‐18‐crown‐6 in the presence of tetraphenylborate as the counter anion, which increased the hydrophobicity of the ion‐association complex, resulting in its improved extraction into 1‐octanol. Strontium from the organic phase was stripped with nitric acid back to aqueous solution and determined by ion chromatography. The optimum microextraction conditions were as follows: 2.0 mL aqueous samples with 3 mM tetraphenylborate; 150 μL of 1‐octanol as the extractant phase with 10 mM DtBuCH18C6; vortex extraction time for 10 s; centrifugation at 6000 rpm for 4 min; stripping by 0.1 M nitric acid. Under the optimum conditions, the detection limit for strontium was 0.005 mg/L. The calibration curves showed good linearity over the range between 0.01 and 2.5 mg/L. Intra‐ and interday precisions of the present method were satisfactory with relative standard deviations of 1.7 and 2.1%, respectively.
Simultaneous detection of zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate in cabbage leaves by capillary electrophoresis with inductively coupled plasma mass spectrometry
Authors: Chen Jinfa , Fu Fengfu , Wu Siying , Wang Jing , Wang Zongwen 
Published: July 2017

AbstractWe report a simple and highly sensitive method for the simultaneous detection of trace zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate by capillary electrophoresis with inductively coupled plasma mass spectrometry. Zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate were chelated with trans‐1,2‐diaminocyclohexane‐N,N,N′,N′‐tetraacetic acid to form a macromolecule complex. Then, these two compounds were separated by α‐cyclodextrin‐modified capillary electrophoresis within 12 min at a separation voltage of 15 kV and measured by inductively coupled plasma mass spectrometry. The developed method is sensitive with detection limit of 1.9 and 3.0 ng Zn/mL for zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate, respectively. By means of ultrasound‐assisted extraction methods, zinc dimethyldithiocarbamate and zinc ethylenebisdithiocarbamate spiked into cabbage leaves were successfully extracted and determined with a relative standard deviation (n = 5) ≤ 6% and a recovery of 95–107%.
Quantitative studies of rhubarb using quantitative analysis of multicomponents by single marker and response surface methodology
Authors: Sun Jiachen , Wu Yueting , Dong Shengjie , Li Xia , Gao Wenyuan 
Published: July 2017

AbstractIn this work, we developed a novel approach to evaluate the contents of bioactive components in rhubarb. The present method was based on the quantitative analysis of multicomponents by a single‐marker and response surface methodology approaches. The quantitative analysis of multicomponents by a single‐marker method based on high‐performance liquid chromatography coupled with photodiode array detection was developed and applied to determine the contents of 12 bioactive components in rhubarb. No significant differences were found in the results from the quantitative analysis of multicomponents by a single‐marker and the external standard method. In order to maximize the extraction of 12 bioactive compounds in rhubarb, the ultrasonic‐assisted extraction conditions were obtained by the response surface methodology coupled with Box–Behnken design. According to the obtained results, we showed that the optimal conditions would be as follows: proportion of ethanol/water 74.39%, solvent‐to‐solid ratio 24.07:1 v/w, extraction time 51.13 min, and extraction temperature 63.61°C. The analytical scheme established in this research should be a reliable, convenient, and appropriate method for quantitative determination of bioactive compounds in rhubarb.
Top‐cross‐loop improving the performance of the UWB planar monopole antennas
Authors: Zhang Daisong , Rahmat‐Samii Yahya 
Published: July 2017

AbstractA novel topology of top‐cross‐loop (TCL) is proposed for the CPW‐fed ultra‐wideband (UWB) antenna. It increases the bandwidth of the planar monopole antennas and keeps their good radiation characteristics. Both those properties are required by UWB devices. The topology is convenient for the mass production because it is single‐layer and easy to fabricate. A prototype of the UWB antenna with TCL is designed, fabricated and measured to confirm the advantages of the novel topology. It covers the bandwidth of 91%, a 1.71 GHz increase from the monopole antenna of the same size without TCL. Additionally, the omnidirectional radiation pattern and the low cross‐polarization in the azimuth plane throughout the bandwidth are also achieved. The detailed parametric studies have been performed to characterize the effects of various parameters for optimal performance of the antenna with the TCL topology. A quantitative method—system fidelity factor (SFF)—is utilized to characterize the time domain performance of the antenna. The fabricated monopole with the TCL achieved an SFF of over 0.65 in the measurement and showed low dispersive characteristics in the time domain analysis. Miniaturization of the proposed antenna further reduces the overall size by 27%.
Wideband circularly polarized cylindrical dielectric resonator antenna for X‐band applications
Authors: Dash Sounik Kiran Kumar , Khan Taimoor , Kanaujia Binod Kumar 
Published: July 2017

AbstractThis letter presents a circularly polarized cylindrical dielectric resonator antenna (DRA) with wide band characteristics. The circular polarization (CP) is actualized by placing a set of symmetric tapered sheets on either side of the feed line, which is quite first time in DRA. The measured results shows 4.0% axial‐ratio (AR) bandwidth for AR < 3 dB, while operating over S11 < −10 dB bandwidth of 16.77% (7.1–8.4) GHz with a peak gain of 5.92 dBi. This proposed low profile compact DRA can be a favorable candidate for X‐band applications.
SRR loaded periwinkle flower shaped fractal antenna for multiband applications
Authors: Elavarasi C. , Shanmuganantham T. 
Published: July 2017

AbstractThe split ring resonator (SRR) loaded periwinkle flower (PWF) shaped fractal antenna for multiband applications are presented. The CPW‐Fed antenna consists of SRR, which is fixed on the back side of the FR4 and periwinkle petals which are etched on top of the FR4 i.e., on the circular patch. The periwinkle flower‐shaped irregular fractal patch is erected on the substrate whose dimensions are Ws × Ls × h mm3 and the ground is also modified (MG) to achieve multiple frequency bands covering 3.476 GHz at S‐band, 4.844 GHz at C‐band, 8.3 GHz also 10.28 GHz at X‐band, 17.76 GHz and at Ku‐band. Parametric analysis and measured antenna device results are also presented.
Planar slot antenna with circular and vertical polarization diversity
Authors: Lawrence Nicholas P. , Fumeaux Christophe , Abbott Derek 
Published: July 2017

AbstractThis article proposes an easily manufacturable multifunction two‐port planar slot antenna, radiating omnidirectional linearly polarized and broadside circularly polarized radiation patterns through a common slot in an overlapping frequency bandwidth at 5.9 GHz of 2.56%, with inter‐port coupling below −45 dB.
L‐band horn antenna radiation enhancement for GPR applications by loading a wire medium
Authors: Abdelgwad Ahmad H. , Said Tarek M. 
Published: July 2017

AbstractAn L‐band horn antenna with modified radiation pattern is customized for ground penetrating radar (GPR) applications. The conventional horn antenna is loaded by a metallic wire medium to enhance the antenna radiation pattern, directivity and gain with reduction of the side‐lobes level. These properties are strongly desirable for GPR applications.
Compact leaky wave antenna using ferroelectric materials
Authors: Jeon H. M. , Ji Z. , Zhuang Y. 
Published: July 2017

AbstractIn this work, we present a leaky wave antenna with an enhanced angular scan rate (ASR) using high permittivity materials. The proto‐type leaky wave antenna consists of a copper‐made rectangular waveguide filled with lead zirconate titanate (PZT). The effective permittivity of the rectangular waveguide is tuned by varying the thickness of the PZT. The antenna showed an ASR of 265°/GHz between 2.4 GHz and 2.6 GHz as the effective permittivity is 337, and an ASR 636°/GHz between 2.12 GHz and 2.23 GHz as the effective permittivity is increased to 813.
Suspended individual SWCNT characterization via bottom gate FET configuration
Authors: Tuo Mingguang , Wang Lu , Amer Moh R. , Yu Xiaoju , Cronin Stephen B. , Xin Hao 
Published: July 2017

AbstractThe microwave transmission properties of suspended, quasi‐metallic individual single‐walled carbon nanotubes (SWCNTs) with a bottom gate field‐effect transistor (FET) configuration have been investigated up to 10 GHz by standard two‐port S‐parameter measurements under different gate bias voltages. A tapered coplanar waveguide (CPW) transmission‐line test fixture is designed to overcome the parasitic and mismatch issues. An open‐through de‐embedding algorithm has been applied to extract the intrinsic properties of SWCNTs. And an equivalent circuit model has been proposed to fit the extracted measurement data as a function of the bottom gate bias voltage, facilitating the applications of CNTs into high‐frequency nanocircuits. Moreover, the properties of our transistor device are found to change after a period of time.
Optimal phase threshold for D‐band vector millimeter‐wave system with frequency sextupled
Authors: Han Xifeng , Yu Jianjun 
Published: July 2017

AbstractOptical radio‐frequency vector signal generated by optical carrier suppression in one single‐electrode modulator can realize frequency sextupled that has the advantage of low cost and simple architecture. However, in the transmitter side, pre‐coding of phase or amplitude is necessary in order to match the phase or amplitude of the recovered quadrature amplitude modulation (QAM) signal. After square‐law detection at photodiode, the detected QAM signals usually have one non‐uniform phase distribution because the characteristics of the optical and electrical devices are not perfect. In order to reduce the bit error rate, we propose to use optimal threshold of error decision for nonuniform phase distribution. Using this scheme, The receiver sensitivity, at the hard‐decision forward‐error‐correction threshold, 3.8 × 10−3, is improved by 3 dB for 4 Gbaud (8 Gbit/s) quadrature‐phase‐shift‐keying millimeter wave signal at 144 GHz.
A novel compact bandstop filter with interdigital and spiral structure
Authors: Zhang Xiao‐Yu , Yang Wang , Yoon Ki‐Cheol , Lee Jong‐Chul 
Published: July 2017

AbstractA compact bandstop filter (BSF) based on frequency‐selecting coupling structure (FSCS) is presented. Quarter‐wavelength FSCS with an open‐circuited resonator is used to implement a BSF. Spiral and interdigital structures are finely designed to realize a further miniaturization. The performance of this filter is evaluated in both simulations and measurements. The operating frequency is 4.3 GHz with an insertion loss (IL) below 15.2 dB and a 3 dB fractional bandwidth of 94.2%. The stopband frequency contains 2.45 and 5.8 GHz, which can be widely used in Wi‐Fi and other applications. There is a good agreement between the simulation and measurement results. The size of the proposed filter is 4.6 × 8.79 mm2.
Two‐dimensional spectrum detection based on the imperfect virtually imaged phased array
Authors: Tan Zhongwei , Li Hongmei , Ding Zhichao , Zhang Lei 
Published: July 2017

AbstractVirtually imaged phased array (VIPA) is typically consists of a thin plate of glass coated with high reflection film coated on both sides. The effects of plate defects on virtually imaged phased array are investigated in this article. We mainly analyze the parallelism and surface roughness of the glass plate by simulation. A 2D disperser is established by a virtually imaged phased array and a diffraction grating. Results show that the degree of plate parallelism will affect the spot size of the beam output, wavelength of the maximum power and 3‐dB bandwidth, and the surface roughness will lead to scattering and loss. The simulation results are validated by experiment.
Novel activating BRAF fusion identifies a recurrent alternative mechanism for ERK activation in pediatric Langerhans cell histiocytosis
Authors: Zarnegar Sara , Durham Benjamin H. , Khattar Pallavi , Shukla Neerav N. , Benayed Ryma , Lacouture Mario E. , Lavi Ehud , Lyden David C. , Diamond Eli L. , Dunkel Ira J. , Abdel‐Wahab Omar 
Published: July 2017

AbstractLangerhans cell histiocytosis (LCH) is an inflammatory myeloid neoplasm characterized by constitutive activation of extracellular signal‐regulated kinase (ERK). Genomic characterization has identified activating point mutations including mutually exclusive BRAFV600E and activating MAP2K1 mutations to be responsible for ERK activation in a majority of pediatric LCH patients. Here, we report the discovery of a novel BRAF kinase fusion, PACSIN2‐BRAF, in a child with multisystem LCH. This is the second reported case of an activating BRAF kinase fusion and indicates a recurrent pathologic mechanism. Genomic evaluation for activating kinase fusions should be strongly considered in pediatric LCH patients lacking more common mutations.
The relationship between coping style and psychological distress in people with head and neck cancer: A systematic review
Authors: Morris Nicolle , Moghaddam Nima , Tickle Anna , Biswas Sanchia 
Published: July 2017

AbstractObjectiveIndividuals diagnosed with head and neck cancer (HNC) are at elevated risk of psychological distress and reduced quality of life. This review aimed to systematically examine and critically assess the quality of empirical evidence for associations between coping mechanisms and psychological distress among people with HNC.MethodsCINAHL, MEDLINE, PsycINFO, EMBASE, and Web of Science were searched. Studies were included if they used reliable and valid measures to investigate the relationship between coping style and psychological distress. Study quality was assessed according to pre‐set criteria.ResultsTwelve studies (8 cross‐sectional and 4 longitudinal designs) involving 1281 patients were reviewed. There was considerable heterogeneity in study samples and coping measures. Moderate‐to‐large associations between disengagement coping mechanisms (eg, avoidance) and psychological distress were observed. Engagement coping strategies (eg, direct action) were not consistently associated with psychological distress.ConclusionsSeveral studies observed a significant relationship between coping styles aimed at disengaging and distancing from cancer and increased psychological distress in people with HNC. To understand directionality of these associations and develop understanding of temporal features of the relationship between coping styles and distress, longitudinal designs could be used. This would enable evidence‐based recommendations regarding psychological interventions (eg, encouraging helpful coping strategies) for individuals along their HNC care pathway.
Study of Electrical Transport of Ag2O – CdO – MoO3 Glass‐Nanocomposite‐Semiconductor
Authors: Kundu Ranadip , Roy Debasish , Bhattacharya Sanjib 
Published: July 2017

AbstractTwo series of semiconducting glass‐nanocomposites xAg2O – (1‐x) (0.1CdO – 0.9 MoO3) and 0.3 Ag2O – 0.7 (yCdO – (1‐y) MoO3) is prepared by melt‐quenching route. The formation of Ag2MoO4, Ag2Mo2O7 and Ag6Mo10O33 nanocrystallites and CdO nanoparticles in glass‐nanocomposites is confirmed by the study of X‐ray diffraction (XRD) and field emission‐ scanning electron microscopic (FE‐SEM). The Fourier transform infrared (FT‐IR) spectra are being taken to find out stretching vibrations of monomeric tetrahedral orthomolybdate ion MoO42− as well as stretching vibrations of Mo2O72 – ions. Micro‐hardness of the as‐prepared samples is found to increase with load and shows a maximum for a particular load for different methods (Vicker's and Knoop's) and different compositions. The dc conductivity is described based on the polaron hopping approach to a wide temperature range. The variable range hopping Mott's (Greave's) model is employed to analyze the conductivity data at low (high) temperatures. The frequency exponent data show that ac conductivity is consistent with overlapping large polaron‐tunnelling (OLPT) model at all temperature.
Facile and Rapid Visualization of Colorless Endocrine Disruptor Bisphenol A by Interfacial Charge‐Transfer Transitions with TiO2 Nanoparticles
Authors: Fujisawa Jun‐ichi , Matsumura Shingo , Hanaya Minoru 
Published: July 2017

AbstractBisphenol A (BPA) is an estrogen‐mimicking endocrine disruptor, which has been widely used in the production of polycarbonates and epoxy resins. Because BPA is a colorless material owing to the wide HOMO‐LUMO gap of ca. 4.3 eV, we cannot discern toxic BPA dissolved in solution with eyes. Here, we report a facile and rapid method for visible‐light sensing of BPA with TiO2 nanoparticles. The chemical adsorption of BPA on anatase TiO2 nanoparticles via the two phenol groups induces interfacial charge‐transfer (ICT) transitions from BPA to TiO2 in the visible region. The ICT transitions give rise to visible‐light absorption up to ca. 600 nm, allowing visible‐light sensing of BPA. This method is also applicable to other phenol‐containing endocrine disruptors. More generally, to our best knowledge, this is the first demonstration for visible‐light sensing of colorless toxic organic compounds based on ICT transitions.