bluuebunny/crossref_metadata_2025_split huggingface dataset:
Broadband bluetooth antenna based on Co2Z hexaferrite‐glass composite
Authors: Lee Jaejin , Hong Yang‐Ki , Bae Seok , Abo Gavin S. , Jalli Jeevan , Park Jihoon , Seong Won‐Mo , Park Sang‐Hoon , An Won‐Gi , Kim Gi‐Ho 
Published: March 2011

AbstractBluetooth ferrite antenna was fabricated on Co2Z (Ba3Co2Fe24O41) hexaferrite‐glass composite substrate and characterized. The fabricated antenna has a total volume of 36 mm3 (3 × 8 × 1.5 mm3) and showed wide bandwidth (390 MHz at VSWR < 2). The maximum 3D peak‐gain and radiation efficiency were measured to be 3.32 dBi at 2.35 GHz and 77.7% at 2.3 GHz, respectively. The 3D peak gain of 2.45 dBi and 3D average gain of −1.89 dBi were obtained at the Bluetooth central frequency of 2.45 GHz. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1222–1225, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25982
Internal eight‐band WWAN/LTE handset antenna using loop shorting strip and chip‐capacitor‐loaded feeding strip for bandwidth enhancement
Authors: Wong Kin‐Lu , Chang Yu‐Wei 
Published: March 2011

AbstractA planar inverted‐F antenna (PIFA) with a loop shorting strip and a chip‐capacitor‐loaded feeding strip to achieve a small size yet wideband operation for eight‐band WWAN/LTE operation (698˜960/1710˜2690 MHz) in the mobile handset is presented.The antenna occupies a small no‐ground footprint of 15 × 35 mm2 on the main circuit board of the handset and is closely integrated with the surrounding system ground plane to achieve compact integration inside the handset. By applying the proposed shorting strip and feeding strip, a dual‐resonance excitation at about 800 MHz which forms the antenna's wide lower band to cover the LTE700/GSM850/900 operation is obtained. Further, the proposed shorting strip and feeding strip lead to the generation of additional higher‐order resonant modes to assist in forming a wide upper band for the antenna to cover the GSM1800/1900/UMTS/LTE2300/2500 operation. The proposed antenna also shows good radiation characteristics over the eight operating bands. The obtained SAR values of the antenna are well less than the limit of 1.6 W/kg for 1‐g head tissue for practical handset applications. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1217–1222, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25983
Time delay estimation of UWB radar signals backscattered from a wall
Authors: Protiva Pavel , Mrkvica Jan , Macháč Jan 
Published: March 2011

AbstractEstimating the basic characteristics of a wall is especially important in the field of through‐wall radar imaging. In this article, we focus on the time delay estimation of signals measured by an ultra‐wideband short‐pulse radar. We describe the essential signal preprocessing steps, which are applied before a subspace super‐resolution method is used to estimate the time delays of overlapping pulses backscattered from the wall. The signal correlation matrix is estimated using only one snapshot of the measured data, and the algorithm can operate in real time. In addition, to resolve closely spaced correlated echoes, we apply an improved spatial smoothing method. The performance of our algorithm is verified by simulations, and we also present the measurement results for two real brick walls. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1444–1450, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25985
Marching‐on‐in‐order time‐domain volume‐surface integral equations in analysis of transient electromagnetic scattering from composite conducting–dielectric objects
Authors: Wang Q. Q. , Yan C. , Shi Y. F. , Ding D. Z. , Chen R. S. 
Published: March 2011

AbstractIn this letter, the matching‐on‐in‐order time‐domain volume‐surface integral equation method is used to analyze transient electromagnetic scattering from objects comprising both conductor and dielectric material. SWG and RWG basis functions are used as the spatial basis functions in dielectric region and on the conducting surface, respectively. Different orders of weighted Laguerre polynomials are used as temporal basis functions, and the relative expansion coefficients are solved recursively order by order. The spatial and temporal testing procedures are separate, and both of them are carried on with the Galerkin's method. Stable solutions are ensured, and several numerical results are given to verify the proposed method. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1315–1319, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25987
A novel single‐band RF front‐end module for wireless communication systems
Authors: Kim Dong Ho , Kim Dongsu , Kim Jun Chul , Park Chong Dae 
Published: March 2011

AbstractIn this article, a novel integrated RF front‐end module (FEM) for wireless communication system is realized by low temperature co‐fired ceramic (LTCC) technology.The proposed RF FEM has four ports and consists of a novel selectable filter, balun, which are fully embedded in the LTCC substrate, and two PIN diodes. This novel selectable filter can be applied for either lowpass filter (LPF) for Tx path or bandpass filter (BPF) for Rx path by simply making output port to be shorted to the ground. The fabricated single‐band RF FEM has nine pattern layers including two ground layers and it occupies less than 2.3 × 4.0 × 0.44 mm3. In case of Tx path, the measured insertion loss at 2‐GHz band is less than 2.3 dB and a return loss of more than 16.8 dB. Furthermore, it provide a more than 40.5 dB second harmonic suppression at 2‐GHz is obtained. In case of Rx path, the measured insertion loss at 2‐GHz band is less than 1.2 dB and a return loss of more than 16.7 dB. The measured results of the implemented RF FEM are in good agreement with the simulated results. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1349–1352, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25991
Study on the reader baseband receiver structure for the demodulation of subcarrier signal in a passive RFID environment
Authors: Bae Ji‐Hoon , Kim Kyung‐Tae , Choi WonKyu , Park Chan‐Won , Pyo Cheol‐Sig 
Published: March 2011

AbstractIn this article, we present a subcarrier demodulation structure to eliminate an undesirable DC‐offset phenomenon, which may appear in the baseband of the reader receiver under passive radio frequency identification environment.To achieve the requirement, the primary feature of the proposed demodulation structure is to reconstruct the signal corrupted by the DC‐offset phenomenon by creating peak signals from the corrupted signal. In the case of the Miller subcarrier signal, the phase inversion information in the symbol duration is used for generating the peak signal. It is shown that the proposed method can successfully detect valid data from the received signal, even when the received baseband signal is distorted by the DC‐offset phenomenon. In addition, the performance of the proposed method is slightly better than or comparable to that of the well‐known‐matched filter‐type baseband receiver in the band‐limited channel environments. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1264–1272, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25995
Simultaneous all‐optical amplification, inversion and format conversion based on self‐induced nonlinear effects in a semiconductor optical amplifier
Authors: Xie Yanqiao , Gao Ying , Gao Shiming , Shu Chester 
Published: March 2011

AbstractWe propose and experimentally demonstrate simultaneous all‐optical amplification, inversion and format conversion based on self‐induced nonlinear effects in a single semicondctor optcial amplifier. All these functions are verified for injected amplitude‐shift keying signals with variable extinction ratios from 5 to 12 dB. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1320–1323, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26009
Simple printed monopole slot antenna for penta‐band wireless wide area network operation in the mobile handset
Authors: Wong Kin‐Lu , Lin Po‐Wei , Chang Chih‐Hua 
Published: March 2011

AbstractA simple printed monopole slot antenna for penta‐band wireless wide area network operation (824–960/1710–2170 MHz) in the mobile handset is presented.The monopole slot has a length of 50 mm only and is embedded close to the bottom edge of the system ground plane of the handset with a small distance of 11 mm. By adding a small‐size C‐shaped strip connected orthogonal to the bottom edge of the system ground plane, good excitation of the monopole slot antenna at its fundamental (0.25 wavelength) and higher‐order resonant modes can be obtained. The excited resonant modes form two wide operating bands to cover the GSM850/900 operation (824–960 MHz) and GSM1800/1900/UMTS operation (1710–2170 MHz). Detailed operating principle and radiation characteristics including the specific absorption rate results of the proposed monopole slot antenna are described. Measured results of the fabricated antenna are also presented. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1399–1404, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26017
Novel band‐notched ultra‐wideband elliptical monopole antenna with dual radiating elements
Authors: Jeng Bo‐Ming , Luo Ching‐Hsing 
Published: March 2011

AbstractA novel ultra‐wideband design of planar elliptical monopole antenna with dual radiating elements is presented. The proposed antenna consists of two elliptical radiating elements and a ground plane. The antenna has a super‐wideband from 2.8 to 15 GHz for voltage standing wave ratio less than 2, except the notched band at 4.8–5.9 GHz for filtering the wireless local area network signal. Based on the contribution of the shorting position d to the notch bandwidth, a particular notch‐band range can be designed by adjusting the size of the minor elliptical radiating element. The radiation pattern of the proposed antenna in the yz‐plane is omni‐directional. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1427–1430, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26023
The Israel lobby, American democracy and foreign perceptions of the USA
Authors: Guerlain Pierre 
Published: March 2011

There has been much discussion about the power of the so‐called Israel lobby in the United States. Although the debate has been around for at least three decades the terms of this debate have changed with recent publications. The key questions concerning the so‐called Israel lobby are, first, one of definition —who can be said to belong to or support this lobby, by no means an easy matter which can be solved in ethnic terms—and then one of effectiveness—is US foreign policy in the Middle East shaped by the Israel lobby and is the image of the US in this region of the world and beyond highly correlated with the activities of a domestic pressure group?Analyzing the activities of the Israel lobby leads one to challenge the concept of a separation between domestic and foreign policy. This paper analyzes how the Israel lobby operates within the context of American democracy and also tackles the issue of foreign perceptions of the US and of an often ill defined Israel lobby. Copyright © 2011 John Wiley & Sons, Ltd.
Influence of the nanofiller type and content on permeation characteristics of multifunctional NR nanocomposites and their modeling
Authors: Bhattacharya Mithun , Biswas Subharanjan , Bandyopadhyay Srikanta , Bhowmick Anil K. 
Published: March 2011

AbstractAlong with other properties, superior gas permeation behavior would impart an extra dimension to multifunctional natural rubber (NR) nanocomposites used in various applications, like tires. For the first time, the impact on thermodynamics and kinetics of oxygen transport has been evaluated for nano, micro, and dual filler based multifunctional NR nanocomposites through oxygen permeation studies at three different temperatures. It is seen that, the kinetics is less affected by platelet like nanofillers, while the thermodynamics and eventual permeability are not altered much by fibrous nanofillers. The permeability of the nanocomposites decreased in the presence of nanofillers due to high aspect ratio and exquisite dispersion, as ascertained from morphological studies, which caused increment in tortuosity and the reduction in free volume. Relative permeabilities were compared to predictions of existent permeation models and a novel function was successfully introduced to address deviations in a model. Finally, nearly 60% decrement in permeability of dual filler based nanocomposites explained by the formation of zeta potential driven filler associations indicate potency in development of thinner, but stronger and more durable multifunctional materials with longer air retention capabilities. These could be applied in tire research to reduce material, energy costs and increase fuel efficiencies. Copyright © 2011 John Wiley & Sons, Ltd.
Improved polyvinylpyrrolidone (PVP)/graphite nanocomposites by solution compounding and spray drying
Authors: Wang Leilei , Zhang Liqun , Tian Ming 
Published: March 2011

AbstractIn order to evaluate the roles of graphite dispersion on the functional properties of the composites, PVP/graphite nanocomposites were prepared by blending the aqueous suspension of expanded graphite sheets and polyvinylpyrrolidone (PVP) aqueous solution by ultrasonic treatment, followed by spray drying and direct drying as a comparison individually. The effects of graphite loading and drying method on the dispersion of graphite and the resultant properties of the composites such as electrical and thermal conductivity, friction, and dynamic mechanical properties were studied. The results from transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X‐ray diffraction showed that the composites prepared by fast spray drying exhibited a higher degree of exfoliation and a better dispersion of graphite sheets in the PVP matrix than the corresponding composites prepared by direct drying, leading to a conclusion that fast spray drying can effectively prevent from re‐stacking of the exfoliated graphite sheets as illustrated. As a result, dynamic mechanical thermal analysis showed significant increases in the storage modulus and glass transition temperature for the composites prepared by spray drying. Besides, the spray drying as well greatly improved the electrical and thermal conductivity of the composites. It was also found that the electrical and thermal conductivity of the composites strongly depended on the graphite dispersion, while the friction coefficient unexpectedly does not. Increasing graphite loading level might enhance the probability of graphite sheets re‐stacking, resulting in poor graphite dispersion. Copyright © 2011 John Wiley & Sons, Ltd.
Morphological comparison of isotactic polypropylene parts prepared by micro‐injection molding and conventional injection molding
Authors: Liu Fanghui , Guo Chao , Wu Xian , Qian Xinyuan , Liu Hong , Zhang Jie 
Published: March 2011

AbstractThe morphological feature of microparts evolved during micro‐injection molding may differ from that of the macroparts prepared by conventional injection molding, resulting in specific physical properties. In this study, isotactic polypropylene (iPP) microparts with 200 µm thickness and macroparts with 2000 µm thickness were prepared, and their morphological comparison was investigated by means of polarized light microscopy (PLM), scanning electron microscopy (SEM), differential scanning calorimeter (DSC), and wide‐angle X‐ray diffraction (WAXD). The results presented some similarities and differences. PLM observations showed that the through‐the thickness‐morphology of micropart exhibited a similar “skin–core” structure as macropart, but presented a large fraction of shear layer in comparison to the macropart which presented a large fraction of core layer. The SEM observation of shear layer of micropart featured highly oriented shish‐kebab structure. The micropart had a more homogeneous distribution of lamellae thickness. The degree of crystallinity of the micropart was found to be higher than that of the macropart. High content of β‐crystal was found in micropart. The 2D WAXD pattern of the core layer of macropart showed full Debye rings indicating a random orientation, while the arcing of the shear layer indicates a pronounced orientation. The most pronounced arcing of the micropart indicates the most pronounced orientation of iPP chains within lamellae. Copyright © 2011 John Wiley & Sons, Ltd.
Genetic polymorphisms in AURKA and BRCA1 are associated with breast cancer susceptibility in a Chinese Han population
Authors: Ruan Yuan , Song Ai‐Ping , Wang Hui , Xie Yun‐Tao , Han Ji‐Yuan , Sajdik Constantin , Tian Xin‐Xia , Fang Wei‐Gang 
Published: March 2011

AbstractCentrosome defects can result in aneuploidy and genomic instability, and have important implications for breast cancer development. The Aurora‐A and BRCA1 proteins interact and both are strongly involved in centrosome regulation. Genetic variants in these two genes may have an effect on breast cancer development. Here, we report a comprehensive single nucleotide polymorphism (SNP) and haplotype‐tagging association study on these two genes in 1334 breast cancer cases and 1568 unaffected controls among the Chinese Han population. Apart from a missense SNP, rs2273535 (Phe31Ile), and a probable risk SNP, rs2064863, six htSNPs were analysed in three high‐LD blocks of AURKA spanning from 10 kb upstream to 2 kb downstream of AURKA. For BRCA1, six htSNPs were analysed in a large high‐LD region covering 98 kb (10 kb was extended to each end of BRCA1). The results showed that four SNPs in AURKA (data in recessive model, rs2273535: OR = 2.19, 95% CI = 1.03–4.66, p = 0.0422; rs2298016: OR = 0.38, 95% CI = 0.18–0.82, p = 0.0141; rs6024836: OR = 1.54, 95% CI = 1.18–2.00, p = 0.0014; rs10485805: OR = 0.68, 95% CI = 0.47–0.98, p = 0.0380) and one SNP in BRCA1 (rs3737559, dominant model OR = 1.35, 95% CI = 1.11–1.64, p = 0.0030) were associated with breast cancer susceptibility. After correction for multiple comparisons (FDR = 0.05), only rs6024836 and rs3737559 remained significant. Two haplotypes (CC of block 2, OR = 20.74, 95% CI = 4.35–98.88, p = 0.0001; GG of block 3, OR = 1.32, 95% CI = 1.12–1.56, p = 0.0010) and one diplotype (AG‐GG of block 3, OR = 1.63, 95% CI = 1.18–2.26, p = 0.0031) within AURKA showed strong associations with breast cancer risk. One haplotype of BRCA1 (CTGTTG, OR = 1.30, 95% CI = 1.06–1.59, p = 0.0118) was also associated with breast cancer risk. However, women harbouring both at‐risk genotypes of Aurora‐A and BRCA1 were at a slightly increased risk compared with those harbouring either at‐risk variant alone. Common genetic variants in the AURKA and BRCA1 genes may contribute to breast cancer development. Copyright © 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Using mouse models to investigate the biological and physiological consequences of defects in the Fanconi anaemia/breast cancer DNA repair signalling pathway
Authors: Tischkowitz Marc , Winqvist Robert 
Published: March 2011

AbstractFanconi anaemia (FA) is a rare, predominantly autosomal recessive syndrome (with one X‐linked form) that results in congenital defects, abnormal haematopoiesis and a greatly increased risk of solid tumours in humans. Mutations in at least 14 different genes have been shown to cause FA, and several of these genes, including FANCJ/BRIP1, FANCD1/BRCA2 and FANCN/PALB2, also predispose to breast cancer in heterozygote carriers. The FA genes code for proteins that act in complexes to coordinate the repair of damaged DNA, and thus the FA repair network is intimately linked with hereditary breast cancer. Much remains to be learnt about the functions and interactions of the FA proteins and one experimental approach involves the generation of mice that are deficient in various FA genes. Mouse models for FANCN/PALB2 have recently been generated, including one reported in a recent issue of The Journal of Pathology. Given the pivotal role of the PALB2 protein, which interacts with both BRCA1 and BRCA2, these mice provide valuable insights into the FA phenotype and mechanisms of tumourigenesis caused by disruption of the FA protein network. Copyright © 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Down‐regulation of spinophilin in lung tumours contributes to tumourigenesis
Authors: Molina‐Pinelo Sonia , Ferrer Irene , Blanco‐Aparicio Carmen , Peregrino Sandra , Pastor Maria Dolores , Alvarez‐Vega Juan , Suarez Rocio , Verge Mar , Marin Juan J , Hernandez‐Losa Javier , Cajal Santiago Ramon y , Paz‐Ares Luis , Carnero Amancio 
Published: March 2011

AbstractThe scaffold protein spinophilin (Spn, PPP1R9B) is one of the regulatory subunits of phosphatase‐1a (PP1), targeting it to distinct subcellular locations and to its target. Loss of Spn reduces PPP1CA levels, thereby maintaining higher levels of phosphorylated pRb. This effect contributes to an increase in p53 activity. However, in the absence of p53, reduced levels of Spn increase the tumourigenic properties of cells. In addition, Spn knockout mice have a reduced lifespan, an increased number of tumours and increased cellular proliferation in some tissues, such as the mammary ducts. In addition, the combined loss of Spn and p53 activity leads to an increase in mammary carcinomas, confirming the functional relationship between p53 and Spn. In this paper, we report that Spn is absent in 20% and reduced in another 37% of human lung tumours. Spn reduction correlates with malignant grade. Furthermore, the loss of Spn also correlates with p53 mutations. Analysis of miRNAs in a series of lung tumours showed that miRNA106a* targeting Spn is over‐expressed in some patients, correlating with decreased Spn levels. Proof‐of‐concept experiments over‐expressing miRNA106a* or Spn shRNA in lung tumour cells showed increased tumourigenicity. In conclusion, our data showed that miRNA106a* over‐expression found in lung tumours might contribute to tumourigenesis through Spn down‐regulation in the absence of p53. Copyright © 2011 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Plasma Deposited Electrocatalytic Films with Controlled Content of Pt Nanoclusters
Authors: Dilonardo Elena , Milella Antonella , Cosma Pinalysa , d'Agostino Riccardo , Palumbo Fabio 
Published: March 2011

AbstractCombining platinum sputtering with plasma polymerization in argon–ethylene plasmas, nanocomposite Pt‐hydrocarbon thin films, useful as catalytic layers for proton exchange membrane fuel cells, can be deposited. Pulsing the ethylene flow rate allowed for a fine tuning of the Pt amount in deposited films at low RF input power. The proposed deposition process seems to be an efficient strategy to control the metal content over a wide range of atomic percentages (5–80%). Deposited films were characterized in terms of their chemical, electrochemical and structural properties. The XPS spectra revealed that platinum is included in the films in metallic state. SEM and TEM analyses showed that nanosized Pt clusters (3–7 nm diameter) are uniformly distributed in a porous columnar film structure. The best electrochemical activity (202 cm2 · mg) was achieved with a 500 nm thick thin film containing 0.56 mgPt · cm−2 of catalyst. magnified image