bluuebunny/crossref_metadata_2025_split huggingface dataset:
Non‐local implicit gradient damage models with low‐order finite elements
Authors: Bui Q. V. , Lani F. 
Published: November 2009

AbstractDriven by non‐local strains, which are approximated at least by a linear function, the damage evolution continuously varies, whereas the distribution of local strains remains constant, and this mismatch leads to stress oscillations within a low‐order finite element. Through the enforcement of constant damage via an appropriate average of the non‐local strains that drive damage, the latter becomes discontinuous across inter‐elements. The consistency of the finite element formulation can be retrieved, and it hence enables a significant reduction of the occurrence of stress oscillations, whereas the convergence rate of the finite element formulation is still preserved. Numerical examples with 1D and 2D typical examples show the efficiency and the performance of the proposed approach. Copyright © 2009 John Wiley & Sons, Ltd.
Hydrido‐Osmium(II), ‐Osmium(IV) and‐Osmium(VI) Complexes with Functionalized Phosphanes as Ligands
Authors: Richter Birgit , Werner Helmut 
Published: November 2009

AbstractReaction of five‐coordinate [OsHCl(CO)(PiPr3)2] (1) with the chelating phosphane iPr2PCH2CO2Me gave six‐coordinate [OsHCl(CO)(PiPr3){κ2(P,O)‐iPr2PCH2C(=O)OMe}] (2), which upon treatment with CO and O2 afforded the 1:1 adducts [OsHCl(CO)(L)(PiPr3){κ(P)‐iPr2PCH2CO2Me}] (3, 4) by partial opening of the chelate ring. The vinyl complex [OsCl(CH=CHPh)(CO)(PiPr3){κ2(P,O)‐iPr2PCH2C(=O)OMe}] (5) was obtained from 2 and PhC≡CH by insertion of the alkyne into the Os–H bond. Reaction of 2 with sodium acetate led to metathesis of the anionic ligands and formation of [OsH(η2‐O2CCH3)(CO)(PiPr3){κ(P)‐iPr2PCH2CO2Me}] (6). Osmium(VI) compounds [OsH6(PiPr2R)2] with R = CH2CH2OMe (12), CH2CO2Me (13) and CH2CO2Et (14), and [OsH6(PiPr3){κ(P)‐iPr2PCH2CH2NMe2}] (16) were prepared from osmium(IV) precursors and shown to rapidly react with O2 and primary alcohols. Exploratory studies revealed that the catalytic activity of the hexahydrido complexes in the hydrogen transfer reaction from 2‐propanol to cyclohexanone and acetophenone depends on the type of the functionalized phosphane and is best for R = CH2CH2OMe. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Aberrant methylation of DNA mismatch repair genes in elderly patients with sporadic gastric carcinoma: A comparison with younger patients
Authors: Kim Ho Gun , Lee Soon , Kim Dong Yi , Ryu Seong Yeob , Joo Jae Kyun , Kim Jung Chul , Lee Kyung Hwa , Lee Jae Hyuk 
Published: November 2009

AbstractBackgroundHypermethylation of promoters that regulate the expression of DNA repair genes is associated with gastric carcinoma (GC). Little is known regarding the association between age of disease onset and differences in molecular profiles.MethodsThe two study groups consisted of 100 elderly patients and 100 younger patients. The aberrant DNA methylation patterns of four mismatch repair genes, hMLH1, hMSH2, hMSH3, and MGMT, were compared by bisulfite modification and methylation‐specific PCR (MSP).ResultsThe methylation frequencies for hMLH1 and hMSH3 were significantly higher for the elderly than for the younger GC patients (P < 0.001 and P = 0.031, respectively). A significant correlation was observed between aberrant hMLH1, hMSH3, and MGMT methylation and the loss of hMLH1, hMSH3, and MGMT protein expression (P < 0.001, P = 0.002, and P = 0.001, respectively). The prevalence of aberrant hMLH1 and hMSH3 methylation increased significantly with age.ConclusionThese results suggest that the methylation of hMLH1 and hMSH3 is age related and thus may play an important role in gastric carcinogenesis in the elderly. Screening for hMLH1 and hMSH3 methylation may have clinical significance for the evaluation of elderly patients with GC. J. Surg. Oncol. 2010;101:28–35. © 2009 Wiley‐Liss, Inc.
Erratum: Hybrid approach for efficient calculation of the parallel‐plate impedance of lossy power/ground planes
Authors: Rimolo‐Donadio Renato , Brüns Heinz‐D. , Schuster Christian 
Published: November 2009

AbstractOriginally published Microwave Opt Technol Lett 51: 2051–2056, 2009
. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 247, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24814
Compact bandpass filter with spurious passband suppression using defected ground structure
Authors: Fan Fangfang , Yan Zehong 
Published: November 2009

AbstractIn this article, a novel and compact hairpin bandpass filter (BPF) using defected ground structure (DGS) is discussed. By placing a novel cascaded z‐slot DGS at the location of the input and output port, the first spurious passband can be rejected. The elaborate analysis of the z‐slot DGS has been given. The equivalent circuit of the z‐slot and how the dimension affects the frequency response are presented. In addition, as the DGS is etched on the backside of the substrate, no extra aera is added to the final layout. The experimental results demonstrate that this filter has low insertion loss, small size, and with a rejection level of more than 35 dB for the first spurious passband. The measured results of the proposed BPFs are in good agreement with the simulated ones. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 17–20, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24819
Spiral slot antenna fed by coplanar waveguide using magnetic phase difference
Authors: Park Sungwu , Kim Nam , Rhee Seungyeop , Lee Seungwoo 
Published: November 2009

AbstractA new type of spiral slot antennas, using the magnetic flow in the slots for broadband and circular polarizations fed by a coplanar waveguide, is presented in this letter. Two spiral slots are operated as separate radiators. To reduce the magnetic cancellation between the two feeding lines, two spiral slots are fed by sources which are about 180° out‐of‐phase with each other so that this antenna does not need a balun circuit. The operating frequency range is enlarged by optimizing various parameters. As a result of measurement, the bandwidth of the proposed antenna is 2.7–12 GHz below the return loss of −10 dB, and the 3 dB bandwidth of the axial ratio is in the ranges 4.2–4.7 GHz and 5.9–6.8 GHz. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 28–30, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24821
An experimental investigation of multisoliton generation using an erbium‐doped fiber amplifier and a fiber optic ring resonator
Authors: Ali J. , Yupapin P. P. 
Published: November 2009

AbstractWe have successfully generated the mutisoliton pulses using a Gaussian pulse in a fiber optic ring resonator incorporating an erbium‐doped fiber (EDF) and a semiconductor optical amplifiers (SOAs). The multisoliton memory time within the system is also measured. Initially, the Gaussian input pulse is pumped and amplified through the EDF and the SOAs, respectively. The suitable experimental values, such as drive current, coupling power, and the fiber ring radius, are arranged to generate the multisoliton pulses. In application, the wider multisoliton band can be generated by adjusting the suitable system parameters. Results obtained have shown that the multisoliton with a free spectrum range and spectrum width of 2.4 and 0.96 nm is achieved. The memory time and the maximum soliton output of 15 min and of 5.94 dBm, respectively, are noted. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 70–72, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop. 24834
Comments on a new formulation and solution method of electromagnetic scattering from arbitrary shaped dielectric objects
Authors: Çayören Mehmet , Yapar Ali , Akduman İbrahim 
Published: November 2009

AbstractIn a recent article by Tezel (Microwave and Optical Technology Letters 50 (2008), 2768–2772), it is claimed that a new formulation and a solution method for the electromagnetic scattering problems related to cylindrical dielectric objects of arbitrary shape is presented. The author makes basic mathematical mistakes in the formulation and as a result we have serious doubts about the correctness of the presented numerical results. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 246, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24870
A low‐power CMOS dual‐band RF receiver for IEEE 802.15.4‐based sensor node applications
Authors: Nguyen Trung‐Kien , Kang Hoyong , Kim Nae‐Soo , Pyo Cheol‐Sig 
Published: November 2009

AbstractThis article presents the design and experimental results of a low‐power dual‐band RF receiver front‐end including a dual‐band low‐noise amplifier (LNA) and a downconversion mixer based on the IEEE 802.15.4 standard for sensor node applications. A dual‐band LNA with two inputs is tuned to two resonant frequencies by controlling the voltage on a switched MOS. The implemented RF receiver front‐end achieves a maximum voltage conversion gain of 31 and 21 dB, a noise figure of 6 and 9 dB at the 868/915 MHz and 2.45 GHz bands, respectively. The RF receiver front‐end dissipates a total of 3 mA (including I/Q mixers) under a supply voltage of 1.8 V at both operation bands. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 163–166, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24876
Ant colony based hybrid approach for optimal compromise sum‐difference patterns synthesis
Authors: Rocca P. , Manica L. , Massa A. 
Published: November 2009

AbstractDealing with the synthesis of monopulse array antennas, many stochastic optimization algorithms have been used for the solution of the so‐called optimal compromise problem between sum and difference patterns when sub‐arrayed feed networks are considered. More recently, hybrid approaches, exploiting the convexity of the functional with respect to a sub‐set of the unknowns (i.e., the sub‐array excitation coefficients) have demonstrated their effectiveness. In this letter, an hybrid approach based on the ant colony optimization (ACO) is proposed. At the first step, the ACO is used to define the sub‐array membership of the array elements, while, at the second step, the sub‐array weights are computed by solving a convex programming problem. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 128–132, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24882
A compact low‐pass filter with double‐step impedance shunt stub and defected ground structure for wideband rejection
Authors: Lee Jae‐Kwan , Lee Dong‐Hyo , Kim Young‐Sik 
Published: November 2009

AbstractIn this letter, a compact low‐pass filter (LPF) with wideband rejection using double‐step impedance shunt stub (SISS) and barbell‐type defected ground structure (DGS) is presented. This proposed LPF has similar characteristics in bandwidth, but good wideband rejection and cutoff sharpness compared with the same size conventional LPF, using SISS and conventional DGS. The size reduction of the proposed LPF is about 23% more than the conventional one. Good agreements are achieved between the simulated and measured results. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 132–134, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24883
A Cartesian‐grid collocation technique with integrated radial basis functions for mixed boundary value problems
Authors: Le Phong B. H. , Mai‐Duy Nam , Tran‐Cong Thanh , Baker Graham 
Published: November 2009

AbstractIn this paper, high‐order systems are reformulated as first‐order systems, which are then numerically solved by a collocation method. The collocation method is based on Cartesian discretization with 1D‐integrated radial basis function networks (1D‐IRBFN) (Numer. Meth. Partial Differential Equations 2007; 23:1192–1210). The present method is enhanced by a new boundary interpolation technique based on 1D‐IRBFN, which is introduced to obtain variable approximation at irregular points in irregular domains. The proposed method is well suited to problems with mixed boundary conditions on both regular and irregular domains. The main results obtained are (a) the boundary conditions for the reformulated problem are of Dirichlet type only; (b) the integrated RBFN approximation avoids the well‐known reduction of convergence rate associated with differential formulations; (c) the primary variable (e.g. displacement, temperature) and the dual variable (e.g. stress, temperature gradient) have similar convergence order; (d) the volumetric locking effects associated with incompressible materials in solid mechanics are alleviated. Numerical experiments show that the proposed method achieves very good accuracy and high convergence rates. Copyright © 2009 John Wiley & Sons, Ltd.
The role of interfacial compatibilization upon the microstructure and electrical conductivity threshold in polypropylene/expanded graphite nanocomposites
Authors: Mirzazadeh Hossein , Katbab Ali A. , Hrymak Andrew N. 
Published: November 2009

AbstractAttempts have been made to evaluate the effect of interface and degree of interfacial interaction upon electrical conductivity threshold in polypropylene/expanded graphite (PP/EG) nanocomposites, and dispersion state of graphite nanosheets. For this purpose, maleic anhydride grafted polypropylene (PPgMA) and maleic anhydride grafted EPDM (EPDMgMA) were used as compatibilizer. Nanocomposite samples containing 1–5 vol% of EG were prepared by melt mixing method using laboratory scale internal mixer. Characterization was carried out by using X‐ray diffraction (XRD), differential scanning calorimeter (DSC), thermo‐gravimetric analysis (TGA), scanning electron microscope (SEM), transmission electron microscope (TEM), and rheo‐mechanical spectroscopy (RMS). The conductivity measurements were carried out by using four point probe method according to ASTM D991. Results showed that the conductivity threshold is controlled by the extent of interfacial interaction between PP and EG. So, better conductivity was obtained using PPgMA as compatibilizer which causes higher level of interaction between PP and EG, and therefore better dispersion of the EG nanolayers in the polymer matrix. On the other hand, high levels of compatibilizers, especially EPDMgMA, caused formation of separated aggregates of EG shelled with the compatibilizer, which results in the reduction of conductivity of the nanocomposites. This finding has been verified by SEM, RMS, and conductivity measurements. Effects of EG nanolayers on crystalline structure and thermal decomposition temperature of the nanocomposites have also been investigated by DSC and TGA, respectively. Copyright © 2009 John Wiley & Sons, Ltd.
Processing of continuous poly(amide‐imide) nanofibers by electrospinning
Authors: Lee Seung Hwan , Kim Seong Yun , Youn Jae Ryoun , Seong Dong Gi , Jee Seung Yong , Choi Jin Il , Lee Jae Rock 
Published: November 2009

AbstractContinuous poly(amide‐imide) nanofibers were fabricated using a novel electrospinning method with rotating and re‐collecting cylindrical collectors. The nanofilaments were modified using various post‐treatments, i.e. glycerol treatment and thermal imidization under tension, for possible application as high‐performance reinforcements. Morphological and mechanical properties of continuous poly(amide‐imide) nanofibers prepared by the electrospinning process and various post‐treatments were measured. Severe adhesion between individual nanofibers within fiber bundles was inhibited through surface treatment of the electrospun nanofiber bundles by spraying with glycerol. The morphological and mechanical properties of the continuous poly(amide‐imide) nanofibers and thermal stability were improved using thermal imidization at high temperature under tension. The morphological and mechanical properties of the continuous electrospun nanofibers were improved significantly by post‐treatments after electrospinning because uniform and complete thermal imidization occurred through the core region of the nanofibers. Copyright © 2009 Society of Chemical Industry
Longitudinal trends in river functioning: Patterns of nutrient and carbon processing in three Australian rivers
Authors: Hadwen Wade L. , Fellows Christine S. , Westhorpe Douglas P. , Rees Gavin N. , Mitrovic Simon M. , Taylor Brett , Baldwin Darren S. , Silvester Ewen , Croome Roger 
Published: November 2009

AbstractUnderstanding longitudinal trends in the processing of carbon in rivers represents a much conceptualised, but infrequently tested, issue in aquatic ecology. In this study, we conducted concurrent longitudinal examinations of three very different rivers in eastern Australia to determine whether general principles in river functioning exist across broad geographic and hydrologic scales. Specifically, we examined trends in ambient basic water chemistry, nutrient concentrations, dissolved organic carbon (DOC), extracellular enzymes and food web structure and functioning and conducted bioassays to examine the degree to which DOC and nutrients limit heterotrophic bacterial respiration. These parameters revealed striking similarities across all sites. For metazoan communities, stable isotope analysis showed that algal carbon was the dominant basal resource utilised by consumers in all three rivers, suggesting that in‐stream primary producers strongly underpin trophic pathways regardless of the position within a catchment or catchment condition. Analyses of extracellular enzymes revealed that microbial communities are actively utilising DOC at all sites. In fact, heterotrophic microbial respiration was strongly limited by DOC at all sites, with nutrient additions resulting in only relatively minor increases in respiration. Ultimately, this study demonstrates that DOC and algal carbon are critically important drivers of ecosystem processes in Australian riverine ecosystems. Furthermore, across all of our sites and rivers, ambient nutrient concentrations did not influence carbon processing. The consistent longitudinal trends in river function identified in this study provide useful insights for catchment managers and modellers with respect to identifiying key principles that underpin ecosystem functioning in Australian rivers. Copyright © 2009 John Wiley & Sons, Ltd.
Computational approaches for the genetic and phenotypic characterization of a Saccharomyces cerevisiae wine yeast collection
Authors: Franco‐Duarte R. , Umek L. , Zupan B. , Schuller D. 
Published: November 2009

AbstractWithin this study, we have used a set of computational techniques to relate the genotypes and phenotypes of natural populations of Saccharomyces cerevisiae, using allelic information from 11 microsatellite loci and results from 24 phenotypic tests. A group of 103 strains was obtained from a larger S. cerevisiae winemaking strain collection by clustering with self‐organizing maps. These strains were further characterized regarding their allelic combinations for 11 microsatellites and analysed in phenotypic screens that included taxonomic criteria (carbon and nitrogen assimilation tests, growth at different temperatures) and tests with biotechnological relevance (ethanol resistance, H2S or aromatic precursors formation). Phenotypic variability was rather high and each strain showed a unique phenotypic profile. The results, expressed as optical density (A640) after 22 h of growth, were in agreement with taxonomic data, although with some exceptions, since few strains were capable of consuming arabinose and ribose to a small extent. Based on microsatellite allelic information, naïve Bayesian classifier correctly assigned (AUC = 0.81, p < 10−8) most of the strains to the vineyard from where they were isolated, despite their close location (50–100 km). We also identified subgroups of strains with similar values of a phenotypic feature and microsatellite allelic pattern (AUC > 0.75). Subgroups were found for strains with low ethanol resistance, growth at 30 °C and growth in media containing galactose, raffinose or urea. The results demonstrate that computational approaches can be used to establish genotype–phenotype relations and to make predictions about a strain's biotechnological potential. Copyright © 2009 John Wiley & Sons, Ltd.
Deposition of Size-Selected Cu Nanoparticles by Inert Gas Condensation
Authors: Gracia-Pinilla M , Martínez E , Vidaurri G Silva , Pérez-Tijerina E 
Published: November 2009

Abstract
Nanometer size-selected Cu clusters in the size range of 1–5 nm have been produced by a plasma-gas-condensation-type cluster deposition apparatus, which combines a grow-discharge sputtering with an inert gas condensation technique. With this method, by controlling the experimental conditions, it was possible to produce nanoparticles with a strict control in size. The structure and size of Cu nanoparticles were determined by mass spectroscopy and confirmed by atomic force microscopy (AFM) and scanning electron transmission microscopy (STEM) measurements. In order to preserve the structural and morphological properties, the energy of cluster impact was controlled; the energy of acceleration of the nanoparticles was in near values at 0.1 ev/atom for being in soft landing regime. From SEM measurements developed in STEM-HAADF mode, we found that nanoparticles are near sized to those values fixed experimentally also confirmed by AFM observations. The results are relevant, since it demonstrates that proper optimization of operation conditions can lead to desired cluster sizes as well as desired cluster size distributions. It was also demonstrated the efficiency of the method to obtain size-selected Cu clusters films, as a random stacking of nanometer-size crystallites assembly. The deposition of size-selected metal clusters represents a novel method of preparing Cu nanostructures, with high potential in optical and catalytic applications.
Characterisation of Phenolic Compounds in Oils Produced from Frosted Olives
Authors: Guillaume Claudia , Ravetti Leandro , Gwyn Sonja 
Published: November 2009

AbstractFrost is one of the most important weather related hazards for the Australian olive industry and it has caused significant economic losses during the last decade. Its impact on oil quality was significant in 2006 with more than 20% of Australian oil of that year being affected to some degree. Early frosts will normally affect the fruit leading to significant changes in the chemical and organoleptic characteristics of the oils. The aim of this work was to study the effect of freeze damage on the phenolic composition and quality parameters of oils from three different varieties: Frantoio, Barnea and Picual. Quality chemical parameters showed significant differences in oils produced from fruit that was frozen for 2 and 4 weeks. Those chemical parameters were not significantly different in the oil produced from fruit immediately after being frosted. Nonetheless, the sensorial profile and the polyphenols showed significant changes even with oils produced within a short time after the freezing event. Those changes became more evident with the oils produced at increasing time from the moment of fruit freezing.