bluuebunny/crossref_metadata_2025_split huggingface dataset:
A dual‐band class‐E power amplifier with concurrent matching network in 0.18‐μm CMOS
Authors: Lin Wen‐Jie , Huang Po‐Shun , Cheng Jen‐Hao , Tsai Jeng‐Han , Alsuraisry Hamed , Huang Tian‐Wei 
Published: May 2018

AbstractIn this letter, a dual‐band class‐E CMOS power amplifier (PA) in 0.18‐μm CMOS process is presented. By using concurrent dual‐band impedance matching network, the proposed dual‐band PA can achieve high efficiency in a compact chip area. This dual‐band class‐E PA demonstrates the power gain ≥ 8.4 dB, Psat ≥ 21.4 dBm with power added efficiency ≥ 31% in a compact chip size of 0.5 mm2. This dual‐band class‐E PA achieves comparable power area density of 284.5 (mW/mm2) with other state‐of‐the‐art class‐E PAs at higher frequency.
Compact and low‐loss wilkinson power divider using a high‐Q spiral inductor on a sapphire substrate
Authors: Yoon Tae‐Woong , Kim Dong‐Su , Yook Jong‐Min 
Published: May 2018

AbstractIn this article, a high‐performance Wilkinson power divider (WPD) using lumped elements on a sapphire substrate is presented. The proposed WPD is achieved by replacing the transmission line of the conventional WPD with a π‐type equivalent circuit. It has a thick metal spiral inductor, and an organic layer, with thicknesses of 40 and 60 μm, respectively, and the Q‐factor was 47 at 2 GHz. The measurement result shows excellent RF performance with return loss (S11) and isolation (S21) better than 15 and 12 dB, respectively, and the average insertion loss is lower than 0.3 dB in the operating bandwidths of 3.2 to 4.2 GHz and 6.3 to 10 GHz.
Design of filtering power divider with high frequency selectivity
Authors: Xu Kai‐Da , Bai Yecheng , Zhu Chunhui , Liu Yanhui 
Published: May 2018

AbstractA novel controllable wideband filtering power divider (FPD) with sharp roll‐off skirt and good isolation is presented in this article. By introducing a pair of coupled lines and several uniformed quarter‐wavelength microstrip lines to the power divider, a wide flat passband with good selectivity is achieved. A resistor is then arranged between the 2 coupled line structures to obtain good isolation. Even‐mode and odd‐mode approach is applied to deduce the design equations of the proposed FPD. The center frequency can be adjusted flexibly by simply controlling the length of the coupled lines and the other microstrip lines. Eventually, the proposed power divider centered at 2.3 GHz with a fractional bandwidth of 75% is fabricated and measured for verification. The measured minimum in‐band insertion loss is 0.3 dB, while the isolation is better than 20 dB. Good agreement is shown between the simulated and measured results.
Design and characterization simulation of Ti: Sapphire‐based femtosecond laser system using Lab2 tools in the NI LabVIEW
Authors: Hussain M. , Imran T. 
Published: May 2018

AbstractWe report on the 825‐nm center wavelength, 9.17 mJ pulse energy Ti:sapphire‐based femtosecond laser system simulation carried out by Lab2 tools in LabVIEW (National Instruments, Inc.). The design investigation and characterization of stretched, amplified and compressed pulses made by intensity module and second harmonic generation frequency‐resolved optical gating module in Lab2. The minimum pulse duration of ∼37.80 fs at the output of the compressor end obtained by simulations. The variation of pulse energy, FWHM and central wavelength versus number of passes in the amplifier are computed. The Lab2 tools help to design and characterize laser system before to set up on the optical table. The simulation results save time to calculate parameters which are essential in femtosecond laser system designing. The Lab2 simulation tools, along with financial constraints, it is easier, simple, and efficient to obtain results in short time.
Microwave imaging of periodic rough surfaces
Authors: Chiu Chien‐Ching , Chan Ming‐Kai 
Published: May 2018

AbstractThis article presents the reconstruction of the periodic rough surface. By the Maxwell equations, the periodic Green functions and the boundary conditions, we can get the integral equations; then these equations can be converted into matrix form by the method of moment. We can reconstruct the relative permittivity and shape of periodic rough surfaces through the application of the integral equations and the measured scattered field. The inverse scattering problem is transformed into an optimization problem and solved by self‐adaptive dynamic differential evolution (SADDE) which can process a lot of unknowns for the electromagnetic imaging problems. The article tests the search ability and the resistance to noise for SADDE by different initial guesses for the periodic rough surface. By using the SADDE to reconstruct the periodic rough surface, numerical results show that the SADDE converges to the overall extreme value (global extreme) regardless of the initial guess. Even if the initial guess is far away from the actual value, SADDE can get the correct periodic length, the relative permittivity and shape of the periodic rough surface. Simulation results also show that good reconstruction can be obtained for the noise <1%.
ESPAR‐inspired mechanical beam steering antenna with high gain and wide bandwidth performance
Authors: Katare Kranti Kumar , Biswas Animesh , Akhtar M. J. 
Published: May 2018

AbstractThis article presents electrically steerable passive array radiator inspired high gain, mechanical beam steering configuration, operating in the wide frequency band with frequency dependent radiation characteristics. Monopole antenna in combination with twelve parasitic elements is fed through impedance matching network and offered impedance bandwidth of 32.0% and approximate gain of 9.0 dBi.
Scattering from anisotropic surfaces analyzed with method of moments
Authors: Basta Nikola , Olćan Dragan I. 
Published: May 2018

AbstractA general approach for calculation of scattering from anisotropic conductive surfaces is outlined. It uses method of moments with surface integral‐equation formulation utilizing higher order and edge‐singular basis functions. Scattering from: an anisotropic plate, an array with different anisotropies, and a surface with spatially varying anisotropy are used for verification.
Exact closed‐form finite element solution for the bending static analysis of transversely cracked slender elastic beams on Winkler foundation
Authors: Skrinar Matjaž , Imamović Denis 
Published: May 2018

SummaryIn this paper, bending problem of a transversely cracked beam resting on elastic foundations is addressed by means of the finite element method. The paper covers the derivation of a new finite element, where the soil is modelled by classical Winkler soil model, and the cracked beam is represented by the simplified computational model, as already widely used for various analyses of such transversely cracked slender beams. The derivation of transverse displacements' interpolation functions for the transversely cracked slender beam and the stiffness matrix, as well as the corresponding load vector for the linearly distributed continuous transverse load are presented. All expressions are derived at in closed symbolic forms, and they allow easy implementation in the existing finite element software. The presented approach is ideal for the effortless modelling of cracked beams in conditions where neither information about the crack's growth nor the stresses at the crack's tip is required. Numerical examples covering several load situations are presented to support the discussed approach. The results obtained are further compared with the values from corresponding coupled differential equations as well as from a large 2D plane finite elements model, where a detailed description of the crack was accomplished. It is evident that the drastic difference in the computational effort is not reflected in any significant difference in the results between the models.
Acute care nurses’ perceptions of electronic health record use: A mixed method study
Authors: Strudwick Gillian , McGillis Hall Linda , Nagle Lynn , Trbovich Patricia 
Published: May 2018

AbstractAimThe overall aim of this study is to examine nurses’ perceptions of electronic health record use in an acute care hospital setting.DesignThis study uses a sequential mixed methods design in two phases.MethodsPhase one consists of a survey of Registered Nurses to understand nurses’ perceptions of electronic health record use. Phase two is comprised of focus groups of a subsample from phase one. Data collection occurred from November 2015 ‐ August 2016 and was done in Toronto, Canada.ResultsIn phase one, navigation was found to be a predictor of nurses’ perceptions of electronic health record use. In phase two, participants discussed the following five topics: (1) navigation; (2) functionality; (3) organizational standards; (4) documentation workload and (5) issues of system performance and response time. This study has implications for organizations implementing electronic health records, nursing leaders and electronic health record vendors.
Progress in polyketone materials: blends and composites
Authors: Yang Yan , Li Si‐Yuan , Bao Rui‐Ying , Liu Zheng‐Ying , Yang Ming‐Bo , Tan Chang‐Bin , Yang Wei 
Published: May 2018

AbstractPolyketone (POK), a new environment‐friendly engineering plastic produced from carbon monoxide (CO), can be used for various applications including packaging, fibers and technical items. Due to its exceptional balance of mechanical properties and high chemical resistance, POK holds great potential to be one of the most promising candidates for high‐performance and multifunctional polymer materials. The introduction of other polymer materials, reinforcing fibers or micro‐ and/or nanofillers into the POK matrix is a powerful method for obtaining new POK‐based materials with specific characteristics and satisfactory improvements in properties. This article summarizes and highlights the recent advances and efforts in research and development in the field of POK blends, POK composites and POK blend‐based composites. The applications of POK materials and outlook are also summarized and discussed. © 2018 Society of Chemical Industry
An evaluation of camera trap performance – What are we missing and does deployment height matter?
Authors: Jacobs Caitlin E. , Ausband David E. 
Published: May 2018

AbstractThe camera trap is a powerful research tool that has a wide range of ecological applications and facilitates monitoring over large spatial and temporal scales. To improve the reliability of camera trap studies and provide more knowledge on camera performance, we evaluated three aspects of camera traps that researchers should consider – camera height, blank images and missed detections. We deployed 20 camera stations, each consisting of one low camera (0.6 m) and two adjacent high cameras (3 m). We tested for differences in detection rates and blank images between camera heights. We calculated missed detections using the two high cameras and used a subset of cameras (n = 14) to examine whether missed detections were caused by late triggers or failed triggers. We found that placing cameras high to minimize theft and damage did not influence detection rates. There were, however, more blank images which can increase the time required for analysis. These blank images increased as temperature increased. Missed detections were primarily the result of failed triggers and increased as species size decreased. Failed detections are particularly significant for distribution surveys of low‐density species. Detection at the camera is imperfect, even when working with larger species.
From $$ \mathcal{N}=4 $$ Galilean superparticle to three-dimensional non-relativistic $$ \mathcal{N}=4 $$ superfields
Authors: Fedoruk Sergey , Ivanov Evgeny , Lukierski Jerzy 
Published: May 2018

AbstractWe consider the general$$ \mathcal{N}=4 $$N=4,d= 3 Galilean superalgebra with arbitrary central charges and study its dynamical realizations. Using the nonlinear realization techniques, we introduce a class of actions for$$ \mathcal{N}=4 $$N=4three-dimensional non-relativistic superparticle, such that they are linear in the central charge Maurer-Cartan one-forms. As a prerequisite to the quantization, we analyze the phase space constraints structure of our model for various choices of the central charges. The first class constraints generate gauge transformations, involving fermionic κ-gauge transformations. The quantization of the model gives rise to the collection of free$$ \mathcal{N}=4 $$N=4,d= 3 Galilean superfields, which can be further employed, e.g., for description of three-dimensional non-relativistic$$ \mathcal{N}=4 $$N=4supersymmetric theories.
Evaluation of plasma biomarkers of inflammation in patients with maple syrup urine disease
Authors: Scaini Giselli , Tonon Tássia , Moura de Souza Carolina F. , Schuck Patricia F. , Ferreira Gustavo C. , Quevedo João , Neto João Seda , Amorim Tatiana , Camelo Jose S. , Margutti Ana Vitoria Barban , Hencke Tresbach Rafael , Sperb‐Ludwig Fernanda , Boy Raquel , de Medeiros Paula F. V. , Schwartz Ida Vanessa D. , Streck Emilio Luiz 
Published: May 2018

AbstractMaple syrup urine disease (MSUD) is an autosomal recessive inherited disorder that affects branched‐chain amino acid (BCAA) catabolism and is associated with acute and chronic brain dysfunction. Recent studies have shown that inflammation may be involved in the neuropathology of MSUD. However, these studies have mainly focused on single or small subsets of proteins or molecules. Here we performed a case‐control study, including 12 treated‐MSUD patients, in order to investigate the plasmatic biomarkers of inflammation, to help to establish a possible relationship between these biomarkers and the disease. Our results showed that MSUD patients in treatment with restricted protein diets have high levels of pro‐inflammatory cytokines [IFN‐γ, TNF‐α, IL‐1β and IL‐6] and cell adhesion molecules [sICAM‐1 and sVCAM‐1] compared to the control group. However, no significant alterations were found in the levels of IL‐2, IL‐4, IL‐5, IL‐7, IL‐8, and IL‐10 between healthy controls and MSUD patients. Moreover, we found a positive correlation between number of metabolic crisis and IL‐1β levels and sICAM‐1 in MSUD patients. In conclusion, our findings in plasma of patients with MSUD suggest that inflammation may play an important role in the pathogenesis of MSUD, although this process is not directly associated with BCAA blood levels. Overall, data reported here are consistent with the working hypothesis that inflammation may be involved in the pathophysiological mechanism underlying the brain damage observed in MSUD patients.
Rupture of Non-communicating Rudimentary Horn of Unicornuate Uterus with Pregnancy
Authors: Shiekh Yassar , Ilyas Mohd , Khan Insha 
Published: May 2018

AbstractUnicornuate uterus with a non-communicating horn is a rare anomaly and even rarer pregnancy in its non-communicating horn. The incidence of pregnancy in the non-communicating horn is 1 in 76,000 to 1 in 150,000. Due to non-compliant uterine musculature in the non-communicating horn, it is prone to rupture in cases of pregnancy. The rupture occurs usually in the second trimester. We describe a case which presented with the rupture of non-communicating horn with live fetus inside it. The present case had a 22 week fetus floating in the peritoneal cavity following the rupture of non-communicating horn with normal other uterine horn.
Academic Physical Medicine and Rehabilitation Acute Care Consultations
Authors: MacDonald Shannon L. , Robinson Lawrence R. 
Published: May 2018

AbstractThe objective of this study was to describe the provision of Physical Medicine and Rehabilitation acute care consultations in the United States and Canada. Physical Medicine and Rehabilitation department chairs/division directors at academic centers in Canada and the United States were mailed an 18-item questionnaire. Seven of 13 (54%) Canadian and 26/78 (33%) American surveys were returned. A majority of Canadian and American academic institutions provide acute care consultations; however, there were some national differences. American institutions see larger volumes of patients, and more American respondents indicated using a dedicated acute care consultation service model compared with Canadians.
Treatment of a Patient With Task-Specific Writing Tremor Using Magnetic Resonance-Guided Focused Ultrasound
Authors: Meng Ying , Suppiah Suganth , Scantlebury Nadia , Lipsman Nir , Schwartz Michael L. 
Published: May 2018

AbstractTask-specific dystonia is characterized by abnormal repetitive movements or postures in a specific body part that is triggered and ends with a task, such as writing. Failing medications, surgery, specifically disruption of key nuclei in the thalamus, can provide excellent symptomatic relief. Transcranial magnetic resonance (MR)-guided focused ultrasound is an emerging incision-less thermoablation technique. We describe MR-guided focused ultrasound tandem ablation of the ventral intermediate and ventralis oralis posterior nuclei in a 60-year-old patient with writer’s cramp. The clinical improvement was immediate with incremental benefit from the latter lesion, which was sustained at 6 months follow-up.
The prevalence and predictors of intimate partner violence among pregnant women attending a midwife and obstetrics unit in the Western Cape
Authors: Malan M. , Spedding M.F. , Sorsdahl K. 
Published: May 2018

Background.Intimate partner violence (IPV) during pregnancy is prevalent across the world, but more so in low- and middle-income countries. It is associated with various adverse outcomes for mothers and infants. This study sought to determine the prevalence and predictors of IPV among pregnant women attending one midwife and obstetrics unit (MOU) in the Western Cape, South Africa.Methods.A convenience sample of 150 pregnant women was recruited to participate in the study. Data were collected using several self-report measures concerning the history of childhood trauma, exposure to community violence, depression and alcohol use. Multivariable logistic models were developed, the first model was based on whether any IPV occurred, the remaining models investigated for physical-, sexual- and emotional abuse.Results.Lifetime and 12-month prevalence rates for any IPV were 44%. The 12-month IPV rates were 32% for emotional and controlling behaviours, 29% physical and 20% sexual abuse. The adjusted model predicting physical IPV found women who were at risk for depression were more likely to experience physical IPV [odds ratios (ORs) 4.42, 95% confidence intervals (CIs) 1.88–10.41], and the model predicting sexual IPV found that women who reported experiencing community violence were more likely to report 12-month sexual IPV (OR 3.85, CI 1.14–13.08).Conclusion.This is the first study, which illustrates high prevalence rates of IPV among pregnant woman at Mitchells Plain MOU. A significant association was found between 12-month IPV and unintended pregnancy. Further prospective studies in different centres are needed to address generalisability and the effect of IPV on maternal and child outcomes.
AMIDST THINGS: NEW HISTORIES OF COMMODITIES, CAPITAL, AND CONSUMPTION
Authors: SMITH KATE 
Published: May 2018

AbstractThe review engages with three recently published works, which represent a cross-section of different approaches to studying processes related to the material world. The works consider the emergence of global systems of cotton manufacturing and its relationship to capitalism, the growth of tea consumption in Britain and its social, cultural, and economic impacts, and histories of consumption over a broad chronological and geographical span, respectively. Together, they demonstrate that histories of production, trade, consumption, and use are being rethought in light of the new approaches and questions prompted by global history and new histories of capitalism. At the same time, the review argues, the publication of these works suggests that fundamental assumptions about the material world are changing. Under the influence of new materialism, historians are increasingly tackling questions of agency, materiality, and thingness. As a result, alongside studying what objects mean, historians are increasingly asking what things do. The review argues for the need to ensure that such approaches continue to interact with cultural and social concerns in order to form analyses that fully grapple with the complexity of the material world, as it existed in the past.
Exploring patterns of commonness and rarity in lichens: a case study from Italy (Southern Europe)
Authors: NIMIS Pier Luigi , MARTELLOS Stefano , SPITALE Daniel , NASCIMBENE Juri 
Published: May 2018

AbstractThis paper, based on data from the latest checklist of Italy, analyzes the distribution patterns of rare and common lichen species within biogeographically homogeneous versus heterogeneous areas of Italy, and the relationships with some main drivers of rarity and commonness. The following data were used: 1) commonness-rarity values of 2565 species in nine ecoregions; 2) frequency of 353 nationally rare and 387 nationally common species in 21 administrative regions. The following functional and ecological traits were considered: growth form, photobiont(s), type of reproduction, substrata, bioclimatic range, ecological indicator values for aridity and eutrophication, and poleophoby. Within each ecoregion, rare species by far outweigh common species but about one third of these are common in other ecoregions. At the level of regional floras, rarity is significantly associated with epiphytic substrata, non-trebouxioid photobionts and high air humidity, while commonness is associated with saxicolous substrata, trebouxioid photobionts and eutrophication. Rarity seems to mainly depend on two factors, bioclimate (many rare species are outside the limit of their bioclimatic optima) and reduced availability of suitable habitats (e.g. old-growth forests), while commonness is mainly related to disturbance (eutrophication, creation of drier habitats). Most of the nationally rare lichens belong to an oceanic-suboceanic element with tropical affinities or to a small set of continental species with their optima in the dry steppe biome, which suggests that many rare species can persist in microrefugia, that is sites with microclimates that support small populations of species beyond the boundaries of the climatic limits of their main distributions.
A newBunodophoronspecies (Sphaerophoraceae,Lecanorales) from the Neotropics
Authors: SOTO MEDINA Edier , PRIETO Maria , WEDIN Mats 
Published: May 2018

AbstractThis is the first part of an ongoing taxonomic treatment ofBunodophoron(Sphaerophoraceae,Lecanorales) in the Neotropics, based on the molecular phylogenetic analysis of three markers together with studies of morphology and chemistry, and using the general mixed Yule coalescence (GMYC) method to delimit species boundaries. In the Neotropics, species in this genus grow on the ground or on shrubs in the páramos, and as epiphytes in the montane rainforests. We describe here a new species from the páramos of Colombia,Bunodophoron crespoaeSoto, M. Prieto & Wedin sp. nov., and discuss its distinction from another large and common páramo speciesBunodophoron flabellatum(Hue) Soto, M. Prieto & Wedin comb. nov. Both species are primarily terrestrial in the páramos, althoughB. flabellatummay occasionally also grow as an epiphyte.Bunodophoron crespoaeis characterized by the white,c. 10–13 cm long, subterete to narrowly flattened, main branches. It differs from the otherwise similarB. flabellatumby being distinctly subterete, more abundantly branched, and by having smaller ascospores. Both are distinguished from the primarily epiphyticB. melanocarpumby the considerably larger thallus size, with the main branches ofB. melanocarpumrarely exceeding 3·5 cm in length and 2 mm in width.