bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dietary fat modifies the postprandial inflammatory state in subjects with metabolic syndrome: the LIPGENE study
Authors: Cruz‐Teno Cristina , Pérez‐Martínez Pablo , Delgado‐Lista Javier , Yubero‐Serrano Elena M. , García‐Ríos Antonio , Marín Carmen , Gómez Purificación , Jiménez‐Gómez Yolanda , Camargo Antonio , Rodríguez-Cantalejo Fernando , Malagón Maria M. , Pérez‐Jiménez Francisco , Roche Helen M. , López‐Miranda José 
Published: June 2012

ScopeOur aim was to investigate whether the inflammatory state associated to metabolic syndrome (MetS) patients is affected by diets with different fat quality and quantity.Methods and resultsSeventy‐five subjects from LIPGENE cohort were included in this feeding trial and randomly assigned to one of four diets: high saturated fatty acids (HSFA); high monounsaturated fatty acids (HMUFA) and two low‐fat, high complex carbohydrate (LFHCC) diets, supplemented with long‐chain n‐3 polyunsaturated fatty acids (LFHCC n‐3) or placebo (LFHCC), for 12 weeks each. A postprandial fat challenge, reflecting the intervention dietary fat composition, was conducted post‐intervention. The HMUFA diet significantly reduced postprandial nuclear transcription factor‐kappaB (NF‐kB) activity and the nuclear p65 protein levels relative to fasting values (p < 0.05). Furthermore, we observed a postprandial decrease in this protein with the HMUFA diet compared with the HSFA and LFHCC diets (p < 0.05). The postprandial response of inhibitory molecule from NF‐kB mRNA levels increased with the HMUFA diet compared with the HSFA and LFHCC n‐3 diets (p < 0.05). Postprandial tumor necrosis factor‐α and Metalloproteinase 9 mRNA levels were also reduced after the HMUFA diet compared with the HSFA diet (p < 0.05).ConclusionOur results indicate that the long‐term consumption of a healthy diet model with HMUFA attenuates the postprandial inflammatory state associated with MetS.
Design of compact planar antenna with dual notched bands using slotted rectangular patch for ultrawideband applications
Authors: Moradhesari Amin , Moosazadeh Mahdi , Esmati Zahra 
Published: June 2012

AbstractA simple rectangular monopole antenna with dual band‐notched characteristics is proposed. The main features of the antenna are the compact dimensions and omnidirectional radiation across the whole band of operation. Dual band‐notched characteristics are achieved by two pair of mirror inverted L‐shaped slots at the two sides of the radiator. The measured results show that the proposed antenna operates over the frequency band between 2.5 and 11.9 GHz (131%), defined by VSWR < 2, except two frequencies notched bands of 3.25–4.25 GHz and 5.1–6 GHz. The designed antenna has a small size of 12 × 14 mm2. Experimental and simulated antenna results show that the proposed antenna has a desirable VSWR level, radiation pattern, and gain characteristics for ultrawideband frequency band range. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2053–2091, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26990
Dual‐band bandpass filter using integrated open loop resonators with embedded ground slots
Authors: Ghatak Rowdra , Pal Manimala , Sarkar Pankaj , Poddar D.R. 
Published: June 2012

AbstractIn this article, a dual‐band bandpass filter is proposed using two half wave length open loop resonators integrated in concentric topology. The outer set of resonators are realized to operate at lower pass band of 2.4 GHz which is coupled directly to input and output ports where as the inner set of resonators are designed at 3.5 GHz which is electromagnetically coupled to the outer resonator. To obtain wide passbands, enhanced coupling between the outer resonators is realized using ground slots just below the open loop sections of the resonators. The measured passband bandwidth at 2.45 and 3.5 GHz is 187 and 155 MHz respectively. Four transmission zeros, created due to source load coupling, are located close to the passband edges at 2.18, 2.68, 3.38, and 3.72 GHz to increase skirt selectivity. Over all filter dimension is 20 mm by 32 mm. An equivalent circuit model is developed that is in close agreement with full wave simulation and measured results. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2049–2052, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26991
Design of coplanar waveguide ultrawideband bandpass filter using stub‐loaded resonator with notched band
Authors: Honarvar M. Amin , Sadeghzadeh R.A. 
Published: June 2012

AbstractIn the present research, a novel compact ultrawideband (UWB) bandpass filter on coplanar waveguide (CPW) is examined and implemented. Pairs of three stepped‐impedance open stubs are connected in shunt to a uniform high‐impedance line to form a multiple‐mode resonator (MMR). The physical dimension of the stepped‐impedance stubs is regulated to allocate the first four resonant modes of the MMR within UWB passband (3.1–10.6 GHz).Thus, through etching a complementary split ring resonator on the CPW feed line, the narrow notched band having admissible rejection level is made. Subsequent to obtaining the optimization parameters from the electromagnetic full‐wave simulation, the intended filter is fabricated. The level of agreement between the measured and the simulation results was excellent. The advantages of the proposed filter include compaction (0.55 λ), flat group delay with maximum 0.17 ns variation in the passband, low insertion loss, and good return loss as well as improved upper stopband. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2056–2061, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26992
Electromagnetic coupling through a dielectric layer with a left‐hand circular polarization
Authors: Serres A. , Fontgalland G. , de Farias J. E. P. , Baudrand H. 
Published: June 2012

AbstractAn analytical method to model an electromagnetic source with left‐hand circular polarization and the space distribution of the waves through a dielectric layer is presented. The modeling is based on the wave concept. Mathematical expressions for the transmitted and reflected waves are formulated in the frequency domain. An inverse Fourier modal transform is applied to obtain the three‐dimensional behaviors of the waves on the surface of the dielectric layer. The effects of the sources localization on the electromagnetic coupling are included. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2032–2035, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27001
Effects of bending on the performance of split ring resonators
Authors: Khaleel Haider R. , Al‐Rizzo Hussain M. , Rucker Daniel G. 
Published: June 2012

AbstractIn this letter, the bending effects on the performance of split ring resonators (SRRs), which is characterized by the effective electromagnetic constitutive parameters are investigated. This study is important since SRR is the basic bulk component of the left‐handed metamaterial, which plays a vital role in future's microwave and optical applications. Moreover, the performance of these artificial magnetic structures must be characterized under different bending conditions, which is essential to the design of flexible and conformal microwave and optical devices. This study reveals that bending of SRRs affects the retrieved values of the effective constitutive parameters which must be taken into consideration when designing metamaterials intended for flexible and/or conformal applications. To the best of the authors' knowledge, this kind of study is being reported for the first time in the field of microwave and metamaterial science. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2098–2101, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27011
Design and implementation of a high‐performance 60‐GHz CMOS slot antenna
Authors: Lin Chih‐Ying , Lin Yo‐Sheng , Lu Hsin‐Chia , Chang Yi‐Long 
Published: June 2012

AbstractThis article describes the design and implementation of a monolithic 60‐GHz millimeter‐wave planar CMOS slot antenna. A finite element method‐based three‐dimensional full‐wave electromagnetic solver, high‐frequency structure simulator, is used to simulate and optimize the performance of the antenna. The feeding network adopts the coplanar waveguide (CPW) structure, so the on‐chip antenna can be flip‐chip bonded to a CPW RO4003 conversion board for complete radiation‐pattern measurement. Nearly, omnidirectional operation is achieved by providing four major current paths in the shape of a cross for radiation. The measured input voltage standing wave ratio of the on‐chip slot antenna is smaller than 2 for frequencies 54.6–68.3 GHz. The measured maximum power gain is −0.74 dB at 60 GHz, one of the highest power gains ever reported for a CMOS antenna at 60 GHz. The chip area is only 1 × 0.8 mm2, i.e., 0.8 mm2. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2061–2065, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27012
A novel compact triple‐passband filter design based on stepped impedance stub‐loaded resonators
Authors: Li Zhipeng , Su Tao , Zhao Chunsheng 
Published: June 2012

AbstractThis article presents a new compact triple‐passband filter using stepped impedance stub‐loaded resonators, which is based on even–odd mode analysis.The first and the third passbands are provided in even mode, whereas the second passband is produced in odd mode. Moreover, the bandpass filter (BPF) performance is good at 2.8, 3.9, and 6.7 GHz by tuning the physical length of high impedance part of the stub. Measurement results agree well with the full‐wave EM simulations. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2106–2108, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27017
Multiband metamaterial structure: Butterfly‐pattern resonator
Authors: Du Guohong , Liu Changjun 
Published: June 2012

AbstractThis article presents a novel multiband metamaterial structure named butterfly pattern resonator (BPR).The effective medium parameters of this metamaterial are extracted from the full‐wave simulation, which shows that two resonances are caused by different magnetic modes with negative effective permeability and one another resonance is caused by electric mode with negative effective permittivity. The experiment results from a waveguide measurement system verify the multiresonant characteristics of the resonator. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2179–2181, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27027
A 3–5‐GHz ultrawideband CMOS transmitter using switched LC VCO
Authors: Ha Mincheol , Park Byungjun , Park Hyungchul , Eo Yunseong 
Published: June 2012

AbstractA 3–5‐GHz CMOS ultrawideband (UWB) transmitter is implemented using 0.18‐μm CMOS technology.The transmitter is composed of switched LC VCO and digital pulse generator (DPG). The proposed DPG provides the short and tunable VCO switching pulse. The measured UWB center frequency range is 3.5–4.4 GHz with the trimmable capacitor bank of LC VCO, and the pulse duration is tunable from 1 to 3 ns by virtue of DPG. The measured energy efficiency per pulse is 5.8% and the power consumption is 0.22 mW at 10 Mbps without the buffer amplifier. The chip core size is 350 × 1000 μm2. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2036–2039, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27031
A frequency agile active microstrip antenna for CP operation
Authors: Gautam A. K. 
Published: June 2012

AbstractA frequency agile microstrip antenna for CP operation is presented. The frequency agility is achieved by symmetrical loading of two identical varactor diodes at the radiating edge of the patch, in which the operating frequency of the square microstrip antenna is electronically controlled by the reverse bias voltage of varactor, whereas circular polarization is achieved by four slits and a pair of truncated corners. Theoretical modal for an antenna is developed using modal cavity model and circuit theory concept. The results are validated with MOM‐based simulator and experimental results. A good agreement between the simulated, calculated, and experimental results is obtained. The tuning range is found to be 660 MHz (40.24%) and shows about 71% reduction in antenna size as compared to the conventional circular polarized antenna. Antenna shows consistent radiation characteristics for entire frequency tuning range. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2205–2209, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27033
Compact broadband branch‐line coupler with centrally loaded open‐stub and cascade transmission line
Authors: Su Tao , Zhao Chunsheng , Li Zhipeng 
Published: June 2012

AbstractA novel design method for broadband branch‐line coupler using parallel capacitance and stepped impedance transmission line is presented in this article.The design uses centrally loaded low‐impedance wide open stub as capacitance, and the wavelength of the loaded stub is reduced. Two impedance transformation lines are added on both sides of this loaded stub to achieve a broader band. Simulation and experiment results validate that this method performs well in size reduction and band broadening. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2101–2103, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27037
Development of a novel broadband impedance matching network for 40 Gb/s electro‐absorption modulators
Authors: Han Wei , Daunt Chris , Yang Hua , Peters Frank H. 
Published: June 2012

AbstractIn this article, the equivalent circuit model of an electro‐absorption modulator (EAM) with planar isolated pedestal GSG contact is built to investigate the high‐speed performances. A novel broadband impedance matching method for the microwave packaging of the EAM is presented. With this matching network, RF return loss can be great suppressed in a wide frequency range up to 40 GHz, along with an extended 3‐dB bandwidth to 38.8 GHz. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2026–2032, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27040
Suspension Copolymerization of Vinyl Acetate and Methyl Methacrylate in the Presence of Amoxicillin
Authors: Oliveira Marco Antonio M. , Melo Príamo A. , Nele Márcio , Pinto José Carlos 
Published: June 2012

AbstractThe effects of amoxicillin on the course of vinyl acetate (VAc)/methyl methacrylate (MMA) suspension copolymerizations are analyzed. It is shown that the presence of the drug affects the morphology of the produced particles, although the interfacial tension is insensitive to modification of the drug concentration in the analyzed range (1–3 wt% of the aqueous phase). It is also shown that this drug interacts preferentially with VAc, causing an inhibitory effect on the rate of polymerization and enhancing the characteristic composition drift of VAc/MMA copolymerizations. Finally, it is shown that the presence of the drug leads to significant modifications of the molecular weight distributions of the final polymer material.magnified image
Alias subtraction more efficient than conventional zero‐padding in the Fourier‐based calculation of the susceptibility induced perturbation of the magnetic field in MR
Authors: Bouwman Job G. , Bakker Chris J. G. 
Published: June 2012

AbstractForward calculation of the susceptibility induced field shift by Fourier‐based procedures requires spatial zero‐padding to prevent aliasing artifacts (periodic wrap‐around). Padding with a factor of two gives accurate results, however, halves the maximal attainable resolution, and slows down the calculation, which may hamper the feasibility of real‐time calculations. Herein is proposed to first perform the calculation at the original resolution—allowing aliasing—and to remove aliasing with an additional convolution in a lower resolution, to alleviate these restrictions regarding memory size and calculation speed, a procedure we termed “virtual” zero‐padding. Virtual zero‐padding was numerically and experimentally tested and validated with conventional zero‐padding and the analytical solution (in the case of spheres) on several phantoms. A demonstration of the increased efficiency is given by implementing virtual zero‐padding in a dynamic calculation procedure. The improved efficiency is expected to be relevant regarding the ongoing increase in spatial and temporal resolution in ultra‐high‐field MRI. Procedures are presented for circular convolution using the discrete Green's function and k‐space filtering using the continuous Green's function. Magn Reson Med, 2012. © 2012 Wiley Periodicals, Inc.
Non‐contrast‐enhanced renal and abdominal MR angiography using velocity‐selective inversion preparation
Authors: Shin Taehoon , Worters Pauline W. , Hu Bob S. , Nishimura Dwight G. 
Published: June 2012

AbstractNon‐contrast‐enhanced MR angiography is a promising alternative to the established contrast‐enhanced approach as it reduces patient discomfort and examination costs and avoids the risk of nephrogenic systemic fibrosis. Inflow‐sensitive slab‐selective inversion recovery imaging has been used with great promise, particularly for abdominal applications, but has limited craniocaudal coverage due to inflow time constraints. In this work, a new non‐contrast‐enhanced MR angiography method using velocity‐selective inversion preparation is developed and applied to renal and abdominal angiography. Based on the excitation k‐space formalism and Shinnar‐Le‐Roux transform, a velocity‐selective excitation pulse is designed that inverts stationary tissues and venous blood while preserving inferiorly flowing arterial blood. As the magnetization of the arterial blood in the abdominal aorta and iliac arteries is well preserved during the magnetization preparation, artery visualization over a large abdominal field of view is achievable with an inversion delay time that is chosen for optimal background suppression. Healthy volunteer tests demonstrate that the proposed method significantly increases the extent of visible arteries compared with the slab‐selective approach, covering renal arteries through iliac arteries over a craniocaudal field of view of 340 mm. Magn Reson Med, 2013. © 2012 Wiley Periodicals, Inc.
Screening and selection procedures with control variates and correlation induction techniques
Authors: Tsai Shing Chih , Kuo Chen Hao 
Published: June 2012

AbstractWe consider the problem of identifying the simulated system with the best expected performance measure when the number of alternatives is finite and small (often < 500). Recently, more research efforts in the simulation community have been directed to develop ranking and selection (R&S) procedures capable of exploiting variance reduction techniques (especially the control variates). In this article, we propose new R&S procedures that can jointly use control variates and correlation induction techniques (including antithetic variates and Latin hypercube sampling). Empirical results and a realistic illustration show that the proposed procedures outperform the conventional procedures using sample means or control variates alone. © 2012 Wiley Periodicals, Inc. Naval Research Logistics, 2012
A domain decomposition method for concurrent coupling of multiscale models
Authors: Thirunavukkarasu Senganal , Guddati Murthy N. 
Published: June 2012

SUMMARYMotivated by atomistic‐to‐continuum coupling, we consider a fine‐scale problem defined on a small region embedded in a much larger coarse‐scale domain and propose an efficient solution technique on the basis of the domain decomposition framework. Specifically, we develop a nonoverlapping Schwarz method with two important features: (i) the use of an efficient approximation of the Dirichlet‐to‐Neumann map for the interface conditions; and (ii) the utilization of the inherent scale separation in the solution. The paper includes a detailed formulation of the proposed interface condition, along with the illustration of its effectiveness by using simple but representative numerical experiments. Copyright © 2012 John Wiley & Sons, Ltd.
Nanohybrid shish kebab structure and its effect on mechanical properties in poly(L‐lactide)/carbon nanotube nanocomposite fibers
Authors: Ning Nanying , Zhang Wei , Zhao Yongsheng , Luo Feng , Fu Qiang 
Published: June 2012

AbstractIn our previous work, the formation of a nanohybrid shish kebab (NHSK) structure was successfully achieved in helical polymer systems promoted by using single‐walled carbon nanotube (CNT) bundles with a unique ‘groove structure’, which is of great crystallographic interest. To further investigate the effect of surface groove structure of CNT bundles on the formation of NHSK structure in helical polymer systems, in the work reported here double‐walled carbon nanotube (DWNT) fibers with bundle structure were used as nucleating agents and orientation templates for poly(L‐lactide) (PLLA) crystallization. A fine NHSK structure with controlled lateral size and period of kebabs was successfully obtained under various experimental conditions by using DWNT bundles. This could be due to the geometric confinement effect of the surface groove structure of the DWNT bundles, which could facilitate the orientation of PLLA chains along the DWNT axis and the lateral formation of a stable nucleus. Our work suggests an efficient method for the functionalization of CNTs with biocompatible PLLA, which may have some potential applications in biomedical areas. In addition, it is demonstrated that the formation of NHSK structure can effectively improve the physical bonding between PLLA and nanotubes, thus significantly improving the mechanical properties of PLLA/CNT nanocomposite fibers. Copyright © 2012 Society of Chemical Industry
Is it the boundaries or disorder that dominates electron transport in semiconductor `billiards'?
Authors: Micolich A.P. , See A.M. , Scannell B.C. , Marlow C.A. , Martin T.P. , Pilgrim I. , Hamilton A.R. , Linke H. , Taylor R.P. 
Published: June 2012

AbstractSemiconductor billiards are often considered as ideal systems for studying dynamical chaos in the quantum mechanical limit. In the traditional picture, once the electron's mean free path, as determined by the mobility, becomes larger than the device, disorder is negligible and electron trajectories are shaped by specular reflection from the billiard walls alone. Experimental insight into the electron dynamics is normally obtained by magnetoconductance measurements. A number of recent experimental studies have shown these measurements to be largely independent of the billiard's exact shape, and highly dependent on sample‐to‐sample variations in disorder. In this paper, we discuss these more recent findings within the full historical context of work on semiconductor billiards, and offer strong evidence that small‐angle scattering at the sub‐100 nm length‐scale dominates transport in these devices. This has important implications for the role these devices can play for experimental tests of ideas in quantum chaos.