bluuebunny/crossref_metadata_2025_split huggingface dataset:
Improvement of isolation and envelop correlation coefficient using C‐loaded λ/4 loop antenna on hollow ground
Authors: Lee Jae‐Gon , Kim Dong‐Jin , Lee Jeong‐Hae 
Published: June 2016

ABSTRACTA C‐loaded λ/4 loop antenna on a hollow ground is presented to improve the isolation and envelop correlation coefficient (ECC) in the mobile terminals. The designed antenna is composed of a straight type of C‐loaded λ/4 loop on hollow ground and a monopole branch operating for LTE800 and LTE1900 bands, respectively. The proper value of a loaded capacitor of the loop makes λ/4 resonance, resulting in the parallel current flow on the ground plane while a conventional planar inverted‐F antenna (PIFA) generates a vertical current flow in the ground. Thus, the combination of two antennas will give rise to high isolation and low ECC. The isolation and ECC of both cases of PIFA (primary) versus PIFA (secondary) and PIFA (primary) versus C‐loaded λ/4 loop antenna with a monopole branch (secondary) are compared when they are diagonally placed in a mobile handset. The isolations in the former and latter cases are measured to be lower than −5.3 and −22 dB in the LTE800 band, respectively. Also, the ECC values in the former and latter cases are measured to be 0.81 and 0.29 from far‐field radiation patterns in the LTE800 band, respectively. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2189–2194, 2016
Dual circularly polarized falcate‐shaped slot antenna
Authors: Lee Sungwoo , Min Lee Jong , Yun Juho , Heon Kwon Oh , Jun Lim Hong , Bin Park Won , Cheol Hwang Keum 
Published: June 2016

ABSTRACTIn this paper, the design of a low‐profile slot antenna with dual microstrip feeds is presented for broadband dual circular polarization. The proposed antenna is composed of a falcate‐shaped slot to achieve broadband circularly polarized radiation and two individual 50‐Ω microstrip feeds to realize both right‐ and left‐hand circular polarizations simultaneously at the same frequency. The overall dimensions of the fabricated antenna are 50 * 50 * 0.76 mm3. The measured −10 dB reflection bandwidths at port 1 and port 2 are 31.14% (5.64–7.72 GHz) and 30.05% (5.6–7.58 GHz), respectively. Furthermore, a port coupling level of less than −15.68 dB was also achieved across the operation band. The fabricated antenna also exhibits 3 dB axial ratio bandwidths of 56.47% (4.6–8.22 GHz) and 54.06% (4.63–8.06 GHz) for right‐ and left‐hand circular polarizations, respectively. The measured peak gains are higher than 3.66 dBic for both polarizations. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2245–2250, 2016
An improved broadband transition between microstrip and empty substrate integrated waveguide
Authors: Peng Hao , Xia Xinlin , Dong Jun , Yang Tao 
Published: June 2016

ABSTRACTIn this letter, an improved broadband transition between microstrip and empty substrate integrated waveguide (ESIW) is proposed. The transition structure consists of a gradient microstrip line, a taper extended into ESIW, and ESIW section. Compared with the previous studies, the gradient microstrip line is introduced to expand the operating bandwidth and get a better performance, especially for the thinner dielectric substrate. The simulated and measured results have a good agreement. A back‐to‐back transition is designed, manufactured, and tested. For a single transition, the return loss and insertion loss are better than 13.5 and 0.75 dB from 6.6 to 16.45 GHz (85.5%), respectively. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2227–2231, 2016
Frequency reconfigurable E‐shaped patch antenna for medical applications
Authors: Kumar Jayendra , Talukdar F. A. , Basu Banani 
Published: June 2016

ABSTRACTArticle proposes reconfigurable E‐shaped patch antenna using PIN diode to switch the antenna between two frequency states: 335–565 MHz, 1.29–1.42 GHz and 2.03–2.28 GHz in multiband and 300–645 MHz in single band. Placement of the rectangular slots operates the patch in multiband. Single band is achieved using a bandpass filter. Parasitic element improves the impedance characteristics. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2214–2217, 2016
Wide‐band frequency agile MIMO antenna system with wide tunability range
Authors: Hussain Rifaqat , Sharawi Mohammad S. 
Published: June 2016

ABSTRACTIn this work, a 4‐element wide band frequency agile multiple‐input‐multiple‐output (MIMO) antenna system is presented. Frequency agility is achieved by loading the antenna elements with capacitive reactance using varactor diodes. The proposed MIMO antenna is a wide band antenna with very wide tunability range between 1610 and 2710 MHz, thus covering several well‐known wireless standards. Each tuned band has at least 470 MHz bandwidth. The proposed design is simple in structure with low profile antenna elements. The design is fabricated on an FR4 substrate with single element dimensions of 7.9 × 26.9 mm2 on a single board of dimensions 60 × 100 × 0.8 mm3. The proposed MIMO antenna system is highly suitable to be used in wireless handheld devices and mobile terminals within a cognitive radio platform. The antenna system is also characterized for MIMO performance metrics. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2276–2280, 2016
A 2.4‐GHz CMOS power amplifier using a gain and stability enhancement technique for IEEE 802.11N WLAN applications
Authors: Lee Changhyun , Park Changkun 
Published: June 2016

ABSTRACTIn this work, we propose a gain and stability enhancement technique with compact size for RF CMOS linear power amplifier applications. The proposed amplifier is designed with differential and cascode structures. To realize a compact size of the power amplifier, the driver stage is merged into the power stage of the power amplifier. To minimize the number of essentially required inductors, the load impedance of the power stage is shared with the driver stage of the power amplifier. Additionally, to moderate stability problems in the power amplifier, the closed loop is removed using a common‐gate transistor, which operates in the saturation region. The power amplifier can then operate in the linear operation. To prove the feasibility of the proposed linear amplifier, we designed a 2.4 GHz CMOS power amplifier using the 180‐nm RF CMOS process. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2265–2268, 2016
C‐band high power and high efficiency harmonic‐tuned oscillator
Authors: Yi Yearin , Jeong Jinho 
Published: June 2016

ABSTRACTIn this paper, a high efficiency power oscillator is designed at C‐band for the applications of wireless power transmission. A harmonic‐tuning technique is adopted to achieve a high efficiency at a high frequency. It is also shown that the efficiency of the oscillator is degraded due to the reduced gain of the semi‐conductor transistor at high frequency. The fabricated oscillator using GaN transistor shows an output power of 38.1 dBm with an efficiency of 58.4% at 5.71 GHz, which corresponds to the excellent performance among the reported oscillators around 5 GHz. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2281–2285, 2016
Novel Col12A1 variant expands the clinical picture of congenital myopathies with extracellular matrix defects
Authors: Punetha Jaya , Kesari Akanchha , Hoffman Eric P. , Gos Monika , Kamińska Anna , Kostera‐Pruszczyk Anna , Hausmanowa‐Petrusewicz Irena , Hu Ying , Zou Yaqun , Bönnemann Carsten G. , JȨdrzejowska Maria 
Published: June 2016

ABSTRACTIntroductionMutations in the COL12A1 (collagen, type XII, alpha 1) gene have been described in a milder Bethlem‐like myopathy in 6 patients from 3 families (dominant missense), and in a severe congenital form with failure to attain ambulation in 2 patients in a single pedigree (recessive loss‐of‐function).MethodsWe describe an 8‐year‐old girl of Polish origin who presented with profound hypotonia and joint hyperlaxity at birth after a pregnancy complicated by oligohydramnios and intrauterine growth retardation.ResultsWe identified a novel, potentially pathogenic heterozygous missense COL12A1 c.8329G>C (p.Gly2777Arg) variant using a targeted sequencing panel. Patient fibroblast studies confirmed intracellular retention of the COL12A1 protein, consistent with a dominant‐negative mutation.ConclusionsAs our patient showed a more intermediate phenotype, this case expands the phenotypic spectrum for COL12A1 disorders. So far, COL12A1 disorders seem to cover much of the severity range of an Ehlers‐Danlos/Bethlem‐like myopathy overlap syndrome associated with both connective tissue abnormalities and muscle weakness. Muscle Nerve 55: 277–281, 2017
Uroflowmetry in healthy women: A systematic review
Authors: Sorel Marique R. , Reitsma Hans J.B. , Rosier Peter F.W.M. , Bosch Ruud J.L.H.R. , de Kort Laetitia M.O. 
Published: June 2016

BackgroundAlthough uroflowmetry is a widely used diagnostic test, reference values of uroflowmetry parameters in women are lacking making it difficult to interpret the test results.AimTo quantify the range of results in uroflowmetry parameters in healthy women based on a systematic review.MethodsA search was made in the International Continence Society standardization articles, PubMed, Embase and the Cochrane Library (from inception to 27 February 2014). Studies on uroflowmetry in healthy women were included. The selected articles were examined using a critical appraisal process based on the QUADAS‐2 tool and the Critical Appraisal Skills Program.ResultsMean values of uroflowmetry parameters in healthy women (mean age 37.1 years) were: voided volume (VV) 338 ml (SD 161), maximum flow rate (Qmax) 23.5 ml/s (SD 10), average flow rate (Qave) 13 ml/s (SD 6), postvoid residual (PVR) 15.5 ml (SD 25), voiding time (VT) 29 sec (SD 17), and time to maximum flow rate (time to Qmax) 8 sec (SD 6). Qmax was dependent on VV. There was no clear relationship between Qmax and age, and no correlation between parity and Qmax. A normal shape of the uroflowmetry curve was seen in 70–80% of the flows.ConclusionThis systematic review provides an overview of the range of results of uroflowmetry parameters in healthy women. Neurourol. Urodynam. 36:953–959, 2017. © 2016 Wiley Periodicals, Inc.
Remeshing strategies for large deformation problems with frictional contact and nearly incompressible materials
Authors: Zhang Ziyu , Dolbow John E. 
Published: June 2016

SummaryWe present a framework to efficiently solve large deformation contact problems with nearly incompressible materials by implementing adaptive remeshing. Specifically, nodally integrated elements are employed to avoid mesh locking when linear triangular or tetrahedral elements are used to facilitate mesh re‐generation. Solution variables in the bulk and on contact surfaces are transferred between meshes such that accuracy is maintained and re‐equilibration on the new mesh is possible. In particular, the displacement transfer in the bulk is accomplished through a constrained least squares problem based on nodal integration, while the transfer of contact tractions relies on parallel transport. Finally, a residual‐based error indicator is chosen to drive adaptive mesh refinement. The proposed strategies are applicable to both two‐dimensional or three‐dimensional analysis and are demonstrated to be robust by a number of numerical examples. Copyright © 2016 John Wiley & Sons, Ltd.
Greater early and mid‐pregnancy gestational weight gains are associated with excess adiposity in mid‐childhood
Authors: Hivert Marie‐France , Rifas‐Shiman Sheryl L. , Gillman Matthew W. , Oken Emily 
Published: June 2016

ObjectiveIt is unclear how specific periods of gestational weight gain (GWG) during pregnancy relate to childhood adiposity. The goal of this study was to assess the differential impact of GWG timing on childhood body composition.MethodsIn 979 mother–child pairs from the pre‐birth Project Viva cohort, trimester‐specific GWG was calculated using clinically recorded weights. Outcomes included body mass index (BMI) z‐score, dual X‐ray absorptiometry fat mass index (kg/m2), and fat‐free mass index (kg/m2) in mid‐childhood. Linear regression models were used to assess associations of each trimester's GWG (per 0.2 kg/week) with childhood outcomes, adjusted for maternal prepregnancy BMI, sociodemographic variables, lifestyle, and GWG in prior trimester(s).ResultsMean (SD) first trimester GWG was 0.22 (0.22) kg/week, second trimester 0.49 (0.18) kg/week, and third trimester 0.47 (0.20) kg/week. Faster first trimester GWG was associated with higher BMI z‐score (0.06 units [95% CI: 0.01–0.12] per 0.2 kg/week) and with higher adiposity according to all indices; associations were strongest in women with prepregnancy BMI >30 kg/m2. Faster second trimester GWG was associated with higher BMI z‐score (0.11 [0.04–0.18]), fat mass (fat mass index = 0.16 [0.02–0.31] kg/m2), and lean mass (fat‐free mass index = 0.11 [0.01–0.22] kg/m2). Third trimester GWG was not associated with childhood adiposity.ConclusionsThese results reinforce the importance of addressing appropriate GWG in early pregnancy.
Sarcolipin knockout mice fed a high‐fat diet exhibit altered indices of adipose tissue inflammation and remodeling
Authors: MacPherson Rebecca E.K. , Gamu Daniel , Frendo‐Cumbo Scott , Castellani Laura , Kwon Frenk , Tupling A. Russell , Wright David C. 
Published: June 2016

ObjectiveTo investigate indices of adipose tissue inflammation and remodeling in high‐fat diet (HFD) sarcolipin‐knockout (SLN−/−) mice. SLN regulates muscle‐based nonshivering thermogenesis and is up‐regulated with HFD. SLN−/− mice develop greater diet‐induced obesity and glucose intolerance. This is accompanied by increases in circulating catecholamines and fatty acids. Catecholamines and fatty acids play a role in the pathology of adipose tissue inflammation.MethodsMale mice (wild type and SLN−/−) were fed a HFD (42% kcal from fat) for 8 weeks.ResultsSLN−/− mice displayed greater obesity and glucose intolerance. This was accompanied by higher circulating epinephrine and nonesterified fatty acids. Epididymal but not inguinal subcutaneous adipose tissue from SLN−/− mice displayed higher interleukin‐6, suppressor of cytokine signaling 3, interleukin‐1β, and tumor necrosis factor‐α mRNA expression, and this was associated with increased markers of macrophage infiltration (F4/80 expression and crown‐like structures) and M1 polarization (higher CD11c expression and CD11c/MGL1). Interestingly, this occurred despite SLN−/− mice having smaller adipocytes.ConclusionsIn conditions of nutrient excess, SLN−/− mice display depot‐specific increases in indices of adipose tissue inflammation and remodeling. This could be a compensatory response to reductions in muscle‐based thermogenesis.
Proteomics analyses of subcutaneous adipocytes reveal novel abnormalities in human insulin resistance
Authors: Xie Xitao , Yi Zhengping , Sinha Sandeep , Madan Meenu , Bowen Benjamin P. , Langlais Paul , Ma Danjun , Mandarino Lawrence , Meyer Christian 
Published: June 2016

ObjectiveTo provide a more global view of adipocyte changes in human insulin resistance by proteomics analyses.MethodsBaseline biopsies of abdominal subcutaneous adipose tissue were obtained from 23 subjects without diabetes. Euglycemic clamps were used to divide subjects into an insulin‐resistant group (IR, N = 10) and an insulin‐sensitive (IS, N = 13) group, which were of similar age and gender but unequal adiposity (greater in IR). Proteins of isolated adipocytes were quantified by mass spectrometry using normalized spectral abundance factors.ResultsOf 1,245 proteins assigned, 30 were detected in at least 12 of the 23 subjects that differed significantly in abundance ≥1.5‐fold between IR and IS. IR displayed a pattern of increased cytoskeletal proteins and decreased mitochondrial proteins and FABP4 and FABP5. In subgroup analyses of adiposity‐matched subjects, several of these changes were less pronounced in IR, but the abundance of proteins related to lipid metabolism and the unfolded/misfolded protein response were significantly and unfavorably altered.ConclusionsThese results confirm lower abundance of mitochondrial proteins and suggest increased cytoskeletal proteins and decreased FABP4 and FABP5 in subcutaneous adipocytes of typical IR individuals. Changes in proteins related to lipid metabolism and the unfolded/misfolded protein may discriminate IR and IS individuals of equal adiposity.
Non‐tumour bone marrow lymphocytes correlate with improved overall survival in childhood acute lymphoblastic leukaemia
Authors: Edwin Claire , Dean Joanne , Bonnett Laura , Phillips Kate , Keenan Russell 
Published: June 2016

AbstractComposition of tumour immune cell infiltrates correlates with response to treatment and overall survival (OS) in several cancer settings. We retrospectively examined immune cells present in diagnostic bone marrow aspirates from paediatric patients with B‐cell acute lymphoblastic leukaemia. Our analysis identified a sub‐group (∼30% of patients) with >2.37% CD20 and >6.05% CD7 expression, which had 100% OS, and a sub‐group (∼30% of patients) with ≤2.37% CD20 and ≤6.05% CD7 expression at increased risk of treatment failure (66.7% OS, P < 0.05). Immune cell infiltrate at diagnosis may predict treatment response and could provide a means to enhance immediate treatment risk stratification.
Hydrogels based on schiff base formation between an amino‐containing polyphosphazene and aldehyde functionalized‐dextrans
Authors: Morozowich Nicole L. , Nichol Jessica L. , Allcock Harry R. 
Published: June 2016

ABSTRACTHydrogels generated by the interaction of two different water‐soluble polymers offer access to a new group of soft materials. A prototype amino‐functionalized polyphosphazene with both tyramine and ferulic acid‐based side groups was coupled to aldehyde functionalized‐dextrans to form hydrogels crosslinked via Schiff base chemistry. Synthesis of the polyphosphazene was accomplished by macromolecular substitution and protection‐deprotection chemistry, with characterization by 1H NMR, 31P NMR, solid state 13C NMR, and DSC techniques. Combination of the aqueous polyphosphazene and aldehyde functionalized‐dextran solutions at room temperature caused gelation with different gelation times and crosslink densities dependent on the aldehyde content of the dextran. The hydrogel properties were evaluated using rheology, thermal characterization, and cryo‐microscopy. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 2984–2991
Automatic code generation for quantum chemistry applications
Authors: Mazur Grzegorz , Makowski Marcin , Łazarski Roman , Włodarczyk Radosław , Czajkowska Ewa , Glanowski Michał 
Published: June 2016

AbstractA unified, computer algebra system‐based scheme of code‐generation for computational quantum‐chemistry programs is presented. Generation of electron‐repulsion integrals and their derivatives as well as exchange‐correlation potential and its derivatives is discussed. Application to general‐purpose computing on graphics processing units is considered.
Modulation of β‐Hairpin Peptide Self‐Assembly: A Twenty‐Residue Poly‐l β‐Hairpin Modified Rationally as a Mixed‐l,d Hydrolase
Authors: Goyal Bhupesh , Srivastava Kinshuk Raj , Patel Kirti , Durani Susheel 
Published: June 2016

AbstractThe building blocks of protein structure are defined stereochemically and have remained frozen to only poly‐l alphabet. The D‐enantiomer can be explored to diversify shapes of proteins stereochemically and diversity in shape may enhance proteins in the scope of functional design. Illustrating the scope, we describe here design of a hydrolase mimic over twenty L‐ and D‐α‐amino‐acid residues. The design is accomplished by mutating canonical poly‐L β‐hairpin in a pair of cross‐strand residues to D‐stereochemical structure to provide a bend to β‐hairpin structure that allows its elaboration as a monomer freely soluble in water. The aromatic residues were suitably positioned in the designed mimic to stabilize the molecular fold and to bind aromatic substrate using π–π interaction. The catalytic triad residues were positioned in close proximity for hydrolysis of aromatic‐anchored ligand. The designed peptide variants are proven to bind p‐nitrophenyl phosphate using fluorescence studies and hydrolyze p‐nitrophenyl acetate using UV–based enzyme kinetic assays. The study thus highlights the role of stereochemistry in design of novel folds with desired function.
A General Synthesis Strategy for Highly Dispersed Amorphous MoO3 over Supported Catalysts
Authors: Dai Zhichao , Xu Shengqiang , Guo Lijuan , Huang Qingming , Hu Hui , Chen Xiaohui 
Published: June 2016

AbstractAmorphous MoO3 was evenly deposited on a Bi2SiO5/SiO2 support by a strategy of heterogenous coprecipitation using Ti as structural promoter. The structure and properties of MoO3‐Bi2SiO5/SiO2 have been characterized by a series of techniques, including N2 adsorption/desorption analysis, X‐ray diffraction (XRD), transmission electron microscopy (TEM), X‐ray photoelectron spectroscopy (XPS) and ultraviolet‐visible light (UV‐vis) diffuse reflectance spectra (DRS).The addition of n‐butyl alcohol into synthesis medium resulted in the most dispersive amorphous MoO3, with an average particle size of 4 nm. Selective oxidation of propylene was chosen as a probe reaction to test the performance of catalysts. Kinetic study revealed that the method of heterogeneous coprecipitation enhanced catalytic performance via increasing the number of active sites, rather than changing the nature of it. This is well compatible with characterization results.
Copper Complex of Pinene based Schiff base [CuSBADBH]2: Synthesis and its Application in Catalytic Asymmetric Nitroaldol (Henry) Reaction
Authors: Boobalan Ramalingam , Chang You‐Ming , Chen Chinpiao , Lee Gene‐Hsian 
Published: June 2016

AbstractEight new pinene based tridentate Schiff bases of (+)‐(1S,2R,3S,5S)‐3‐amino‐6,6‐dimethylbicyclo[3.1.1]heptan‐2‐ol were synthesized from (+)‐(α)‐pinene. Copper complexes of these Schiff bases were prepared for asymmetric nitroaldol (Henry) reaction. Among the eight copper complexes, 3‐methylsalicylaldehyde‐derived [CuSBADBH‐4]2 32 showed high chiral induction (85 % ee) for the catalytic asymmetric Henry reaction of 4‐nitrobenzaldehyde. Under optimal reaction conditions, 1 mol% [CuSBADBH‐4]2 32 catalyzed enantioselective Henry reaction of various aromatic and poly aromatic aldehydes afforded the corresponding (R)‐β‐hydroxy nitroalkanes with high ee (up to 92 %) and yield (up to 99 %).
Tuning Size and Reducibility of Copper Oxide Particles Supported on SBA‐15
Authors: Koch Gregor , Schmack Lena , Ressler Thorsten 
Published: June 2016

AbstractCopper citrate was deposited on SBA‐15 at various loadings ranging from 10.9 to 27.1 wt.%. Thermal decomposition resulted in copper oxide particles supported on SBA‐15. In order to study the effect of varying calcination conditions on the resulting particles, precursors were calcined both in a thin powder layer and in a thick powder layer. SBA‐15 and copper oxide particles were characterized using N2 physisorption, XRD, DR‐UV/Vis spectroscopy, and TEM. Depending on layer thickness during calcination, copper oxide particles of various sizes were observed in samples with the same chemical composition. Copper oxide particles were examined by temperature‐programmed reduction. Amorphous copper oxide particles showed a single H2 consumption peak and were reduced to copper at 240 °C. Larger crystalline copper oxide particles showed H2 consumption peaks with a shoulder at higher temperatures and were reduced to copper at 300 °C.