bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rapid prototyping of ceramic millimeterwave metamaterials: Simulations and experiments
Authors: Lee Yoonjae , Lu Xuesong , Hao Yang , Yang Shoufeng , Ubic Rich , Evans Julian R. G. , Parini Clive G. 
Published: June 2007

AbstractRapid prototyping by an extrusion freeforming technique, of ceramic metamaterials based on a woodpile structure at millimeterwave frequencies has been performed. The finite difference time domain technique is applied for the design and characterization of the proposed metamaterials. The transmittance of the millimeterwave metamaterials is measured in the range of 75–110 GHz. Both measurement and simulation results are in good agreement. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2090–2093, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22697
A miniaturized bandpass filter fabricated on high dielectric constant ceramic substrates
Authors: Hsieh Ming‐Liang , Huang Tsung‐Hui , Chen Lih‐Shan , Sun Chian‐Hao , Wang Shuming , Houng Mau‐Phon , Fu Shen‐Li 
Published: June 2007

AbstractA four‐pole open‐loop resonator bandpass filter fabricated on high dielectric constant (Zn0.9Mg0.1)TiO3 ceramic substrates is presented. The full‐wave simulator IE3D is utilized to calculate the coupling coefficients of each basic coupling structure and simulate S‐parameters of the designed bandpass filters. The center frequency of designed bandpass filter is fo = 2.45 GHz and the fractional bandwidth is 4%. The center frequency of the fabricated bandpass filter is at 2.47 GHz and the fractional bandwidth is 5%. The measured insertion loss and return loss of the filter is −3.68 and −14.92 dB, respectively. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2087–2090, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22698
A simple method for simultaneous measurement of the tilt angle and temperature
Authors: Yan Jinhua , He Sailing 
Published: June 2007

AbstractA simple and compact sensor for simultaneous measurement of the tilt angle and temperature is presented. The sensor is composed of a fiber taper and a fiber Bragg grating. The tilt angle is measured by monitoring the tilt‐induced loss of the taper. The grating is used for enhancing the tilt angle sensitivity as well as monitoring the wavelength shift induced by the temperature variation. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2248–2250, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22701
Microstrip line with short‐circuited edge as a high‐pass filter operating up to millimeter‐wave frequencies
Authors: Chramiec Jerzy , Kitlinski Marek , Janiczak Bogdan J. 
Published: June 2007

AbstractThe concept of very simple planar high‐pass filters using microstrip with short‐circuited edge has been extended to filters with pass‐bands beginning in the K and Ka bands. Two examples of such filters have been designed using electromagnetic simulator and fabricated on 0.5‐mm thick alumina substrate and on 0.254‐mm thick low permittivity organic substrate. Theoretical characteristics have been compared with the experimental data demonstrating practical utility of the proposed filter concept at frequencies attaining the millimeter‐wave range. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2178–2180, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22705
Ultra‐wide stopband microstrip low‐pass filter for harmonics suppression
Authors: Liu Haiwen , Bai Tieying , Knoechel Reinhard H. , Sun Lingling , Schuenemann Klaus F. 
Published: June 2007

AbstractAn ultra‐wide stopband microstrip lowpass filter(LPF) for harmonics suppression is introduced in this letter. The LPF is composed of three open stubs, a pair of spur‐lines, and a pair of parallel coupled‐lines with symmetrical structure. Measured results verify that the filter has a return loss better than −20 dB within 4.8–25 GHz, which is about eight times the filter cutoff frequency. The ultra‐wide stopband performance for higher harmonics suppression has great potential applications in wideband microstrip circuit and systems. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2148–2150, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22707
A novel internal antenna with high gain for wireless phone
Authors: Liu Ying , Bu Antao , Gong Shuxi , Kim Hyeongdong 
Published: June 2007

AbstractA novel internal antenna for synchronous code division multiple access band wireless phone is presented. Traditional internal antenna is monopole or Planar Inverted‐F Antenna, which have no gain high enough in the limited space in phone. The proposed antenna is composed of two antenna elements with equal magnitude and 180° phase difference, to assure voice quality with high gain. The measured maximum gain is 2.69 dBi and maximum efficiency is 70.1% in the frequency band 450–470 MHz. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2112–2114, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22708
Analytical attenuation calculation of asymmetrical coplanar waveguide with finite‐extent ground planes for coplanar waveguide mode
Authors: Duyar Mehmet , Akan Volkan , Yazgan Erdem , Bayrak Mehmet 
Published: June 2007

AbstractIn this study, fast and new analytical formulations have been presented for correct loss calculations in asymmetrical coplanar waveguides (CPW) with finite‐extent ground planes for CPW mode. To generalize loss analysis for CPW mode, not only gaps but also finite ground planes are assumed as asymmetric. Moreover, dielectric thickness and ground plane widths are considered as finite for this transmission line. Another important concept presented in this article is that the proposed expressions are easily applicable for CAD platforms. Through the analyses, conformal mapping techniques (CMT) have been employed. The obtained results in this work have been compared with the results of other similar studies (spectral domain method, mode matching, etc.) available in the literature. These comparisons indicate that the expressions developed in this study are found to be more suitable for accurate calculations of loss as well as the characterization of asymmetrical CPW with finite‐extent ground planes. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2082–2087, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22709
Internal antenna design of 900 MHz‐band mobile radio frequency identification system
Authors: Kim Yongjin , Yoon Ick‐Jae , Kim Youngeil 
Published: June 2007

AbstractThe development of Radio Frequency Identification (RFID) system for tracking and controlling goods and products, and obtaining information through transponders (tags) from people and objects are growing very rapidly in modern communication area. Currently, researchers and engineers have taken a growing interest in putting a RFID reader system into a mobile cellular phone. In this study, we propose a wide band antenna for mRFID reader application. The proposed antenna is the wideband PIFA antenna that can cover from 800 MHz cellular frequency band to 900 MHz‐band RFID frequency band. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2079–2082, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22710
Novel circular in‐phase hybrid ring power divider
Authors: Betancourt Diego , del Rio Carlos 
Published: June 2007

AbstractAn experimental investigation about the Circular In‐Phase Hybrid Ring power divider is presented. This device is a Five Ports Hybrid Ring that has potential applications in Antenna Array feeding Networks. Its principal behavior characteristics are analyzed and compared with a conventional device. A prototype, which includes the effects of SMA connectors, was designed and measured corroborating the behavior of this circuit as a conventional five ports microstrip hybrid. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2314–2317, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22714
Intergraded LiNbO3 electrooptical electromagnetic field sensor
Authors: Lee Tsung‐Hsin , Wu Po‐I , Lee Ching‐Ting 
Published: June 2007

AbstractAn integrated electromagnetic field sensor using Z‐cut LiNbO3 Mach–Zehnder waveguide modulator and microantenna was fabricated and measured. A coplanar waveguide antenna was directly integrated with the traveling‐wave electrode of the Mach–Zehnder waveguide modulator on the same LiNbO3 substrate. The minimum detectable electric field strength is 8.91 × 10−4 V/m at 2 GHz. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2312–2314, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22715
Measurement and analysis of optical parameters in anisotropic slab one‐side leaky waveguides
Authors: Gao Fubin , Du Guotong , Sun Yuan , Zhang Ping 
Published: June 2007

AbstractLeaky modes of anisotropic slab one‐side leaky waveguides have been analyzed, and an efficient method for measuring optical parameters of these waveguides is presented in this article by using the prism coupling technique. Measured results show that errors of the refractive indices are within 2.1 × 10−4. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2295–2299, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22721
Two by two ports fused fiber grating coupler
Authors: Ai Lung , Liu Wen‐Fung , Kuo Ching‐Ting , Fu Ming‐Yue , Chen Tzu‐Chiang 
Published: June 2007

AbstractIn this article we have demonstrated that a 2 × 2 ports fused fiber‐grating‐coupler can be implemented by combining the technique of fabricating a fused‐fiber coupler as well as that of writing a fiber Bragg grating for applying in an all‐fiber optical filter. The grating with the grating reflectivity of 87% is fabricated in the tapered region of a 2 × 2 fiber coupler with the coupling ratio of 80 and 20%, respectively to two different output ports. This device can be applied in optical multi/de‐multiplexing and add/drop filters for optical communication systems. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2309–2311, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22723
Urodynamic studies in women with stress urinary incontinence: Significant bacteriuria and risk factors
Authors: Choe Jin Ho , Lee Joong Shik , Seo Ju Tae 
Published: June 2007

AbstractAimA prospective study was performed to determine the incidence of significant bacteriuria and to identify the risk factors for bacteriuria after urodynamic studies (UDSs) in women with urodynamic stress urinary incontinence (SUI).MethodsA total of 225 women with urodynamic SUI were evaluated. All women were negative on double‐screened urine cultures, in clean‐catch midstream urine (MSU) specimens, before UDS. Another urine specimen was obtained for urinalysis and culture at 3–7 days after UDS. Urinary culture with 105 CFU/ml or more was regarded as significant bacteriuria. To identify the risk factors for significant bacteriuria, the clinical characteristics of all patients including age, BMI, parity, medical and operation history, degree of pelvic organ prolapse, results of urinalysis, and UDS were evaluated.ResultsThe prevalence of significant bacteriuria was 6.2%. The most common identified microorganism was Escherichia coli (57.1%). Univariate analysis demonstrated that a history of recurrent urinary tract infection (UTI; P = 0.002) and urological surgery or procedure (P = 0.02) were significant predictors of significant bacteriuria. On multiple logistic regression analysis the past history of recurrent UTI was the only significant independent risk factor (OR = 28.5, 95% CI = 4.309–188.488, P = 0.009).ConclusionsThis study suggests that for most women with SUI it may be unnecessary to use preventive prophylactic antibiotics in UDS. However, our results suggest that in patients with a previous history of recurrent UTI or urologic surgery the risk for significant bacteriuria is increased and use of prophylactic antibiotics should be considered. Neurourol. Urodynam. 26:847–851, 2007. © 2007 Wiley‐Liss, Inc.
Association among the symptoms, quality of life and urodynamic parameters in patients with improved lower urinary tract symptoms following a transurethral resection of the prostate
Authors: Seki Narihito , Yunoki Takakazu , Tomoda Toshihisa , Takei Mineo , Yamaguchi Akito , Naito Seiji 
Published: June 2007

AbstractAimsTo investigate the associations of symptoms and the quality of life (QOL) with objective variables in a strictly selected large cohort of subjects with symptomatic benign prostatic obstruction (BPO).MethodsA retrospective study was conducted in 557 males with BPO in whom a symptomatic improvement had been achieved by transurethral resection of the prostate (TURP), thus suggesting that their lower urinary tract symptoms were primarily due to BPO. The association between the preoperative International Prostate Symptom Score (IPSS) and QOL score with objective variables including the residual volumes, prostate size and urodynamic parameters was statistically analyzed.ResultsMaximum flow rate (Qmax) positively and a residual urine volume (PVR) negatively correlated with symptoms and QOL score. Detrusor overactivity (DO) also was weakly, but broadly associated with the symptoms. Degree of detrusor contractility and bladder capacity had a weak association with only some storage symptoms. The degree of bladder outlet obstruction (BOO) positively related to the scores on urgency, straining and total IPSS. Patients' age had positive correlation with the score on nocturia. The prostate volume was only negligibly correlated with either any symptoms or the QOL score.ConclusionsParameters, such as Qmax or PVR, obtained from the noninvasive urodynamics were most widely correlated with symptoms and QOL. Despite a large group with strict selection of men with LUTS possibly relating to BPO being studied, only weak association between the symptoms or QOL and objective parameters including urodynamics was confirmed. Neurourol. Urodynam. 27:222–225, 2008. © 2007 Wiley‐Liss, Inc.
Nonstandard perturbation approximation and travelling wave solutions of nonlinear reaction diffusion equations
Authors: Kaushik Aditya 
Published: June 2007

AbstractThis paper deals with the construction of a nonstandard numerical method to compute the travelling wave solutions of nonlinear reaction diffusion equations at high wave speeds. Related general properties are studied using the perturbation approximation. At high wave speed the perturbation parameter approaches to zero and the problem exhibits a multiscale character. That is, there are thin layers where the solution varies rapidly, while away from these layers the solution behaves regularly and varies slowly. Most of the conventional methods fail to capture this layer behavior. Thus, the quest for some new numerical techniques that may handle the travelling wave solutions at high wave speeds earns relevance. In this paper, one such parameter robust nonstandard numerical scheme is constructed, in the sense that its numerical solution converges in the maximum norm to the exact solution uniformly well for all finite wave speeds. To overcome the difficulty due to the nonlinearity, the problem is linearized using the quasilinearization process followed by nonstandard finite difference discretization. An extensive amount of analysis is carried out which uses a suitable decomposition of the error into smooth and singular component and a comparison principle combined with appropriate barrier functions. The error estimates are obtained, which ensures uniform convergence of the method. A set of numerical experiment is carried out in support of the predicted theory that validates computationally the theoretical results. © 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq, 2007
Conceptual linearization of Euler governing equations to solve high speed compressible flow using a pressure‐based method
Authors: Darbandi Masoud , Roohi Ehsan , Mokarizadeh Vahab 
Published: June 2007

AbstractThe main objective of the current work is to introduce a new conceptual linearization strategy to improve the performance of a primitive shock‐capturing pressure‐based finite‐volume method. To avoid a spurious oscillatory solution in the chosen collocated grids, both the primitive and extended methods utilize two convecting and convected momentum expressions at each cell face. The expressions are obtained via a physical‐based discretization of two inclusive statements, which are constructed via a novel incorporation of the continuity and momentum governing equations. These two expressions in turn provide a strong coupling among the Euler conservative statements. Contrary to the primitive work, the linearization in the current work respects the definitions and essence of physics behind deriving the Euler governing equations. The accuracy and efficiency of the new formulation are then investigated by solving the shock tube as a problem with moving normal and expansion waves and the converging‐diverging nozzle as a problem with strong stationary normal shock. The results show that there is good improvement in performance of the primitive pressure‐based shock‐capturing method while its superior accuracy is not deteriorated at all. © 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq, 2008
A uniform estimate for the ELLAM scheme for transport equations
Authors: Wang Kaixin , Wang Hong 
Published: June 2007

AbstractWe prove a priori error estimate in a weighted energy norm for the Eulerian‐Lagrangian localized adjoint method (ELLAM) for the transport equations, without any special refinement or numerical stabilization introduced. The estimate holds uniformly with respect to ϵ. © 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq, 2008
An error estimate on a Galerkin method for modeling heat and moisture transfer in fibrous insulation
Authors: Cheng Aijie , Wang Hong 
Published: June 2007

AbstractWe propose a Galerkin finite element method for numerically modeling the process of heat and moisture transfer in porous clothing assemblies, which takes into account radiative heat transfer and sorption of water vapor into the fibers of the medium. We prove an optimal‐order error estimate for the finite element method in energy norm. © 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq, 2008
A quadrature finite element Galerkin scheme for a biharmonic problem on a rectangular polygon
Authors: Aitbayev Rakhim 
Published: June 2007

AbstractA quadrature Galerkin scheme with the Bogner–Fox–Schmit element for a biharmonic problem on a rectangular polygon is analyzed for existence, uniqueness, and convergence of the discrete solution. It is known that a product Gaussian quadrature with at least three‐points is required to guarantee optimal order convergence in Sobolev norms. In this article, optimal order error estimates are proved for a scheme based on the product two‐point Gaussian quadrature by establishing a relation with an underdetermined orthogonal spline collocation scheme. © 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq, 2008
Numerical convergence on adaptive grids for control volume methods
Authors: Khattri S.K. , Aavatsmark I. 
Published: June 2007

AbstractAn adaptive technique for control‐volume methods applied to second order elliptic equations in two dimensions is presented. The discretization method applies to initially Cartesian grids aligned with the principal directions of the conductivity tensor. The convergence behavior of this method is investigated numerically. For solutions with low Sobolev regularity, the found L2 convergence order is two for the potential and one for the flow density. The system of linear equations is better conditioned for the adaptive grids than for uniform grids. The test runs indicate that a pure flux‐based refinement criterion is preferable.© 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq, 2008
Up‐regulation of MKK4, MKK6 and MKK7 during prostate cancer progression: an important role for SAPK signalling in prostatic neoplasia
Authors: Lotan TL , Lyon M , Huo D , Taxy JB , Brendler C , Foster BA , Stadler W , Rinker‐Schaeffer CW 
Published: June 2007

AbstractIdentification of the signalling cascades that are differentially activated during prostatic tumourigenesis is a crucial step in the search for future molecular targets in this disease. The stress‐activated protein kinase (SAPK) signalling cascade culminates in the phosphorylation of the JNK and p38 mitogen‐activated protein kinases (MAPKs). Recently, the upstream activators of these proteins, the MAPK kinases (MKKs), have been implicated as inhibitors of tumour progression in a variety of clinical and experimental tumour models. This study evaluates MKK4, MKK6 and MKK7 expression during prostate cancer progression in humans and in the transgenic adenocarcinoma of a mouse prostate (TRAMP) model of prostate tumourigenesis. Benign prostate, prostatic intraepithelial neoplasia (PIN) lesions and tumour tissues were collected from 37 TRAMP mice. Additionally, six tissue microarrays were constructed with tumours from a matched group of 102 men who underwent radical prostatectomy. Tissues from 20 patients with extensive high‐grade prostatic intraepithelial neoplasia (HGPIN) were also analysed. For all samples, immunohistochemical staining for MKK4, MKK6 and MKK7 was scored in normal and neoplastic glands. Staining intensities of MKK4, MKK6 and MKK7 were significantly increased in HGPIN and prostate cancer compared to surrounding normal glands in both the TRAMP and human samples (p < 0.0001 for all markers). Increased levels of MKK4 or MKK7 correlated with higher pathological stage at prostatectomy (p = 0.01 and p = 0.04). Using multivariate analysis, there was no association between protein levels and time to biochemical recurrence in the human samples. The up‐regulation of MKK4, MKK6 and MKK7 during prostate cancer progression in both TRAMP and human tissues highlights an important role for the SAPK signalling cascade in prostatic neoplasia. The finding that higher MKK4 and MKK7 expression is associated with higher‐stage prostatic tumours underscores the dynamic regulation of these proteins during prostatic tumourigenesis. Copyright © 2007 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Effect of blend composition on diffusivity and solubility of small molecules in polystyrene/poly(vinyl methyl ether) blends
Authors: Galdámez J. Román , Serna Lourdes V. , Larry Duda J. , Danner Ronald P. 
Published: June 2007

AbstractThe capillary column inverse gas chromatography technique was used to determine diffusivity and solubility data for several solvents in polymer blends composed of polystyrene and poly(vinyl methyl ether) (PVME). Diffusivity behaved as expected, increasing as the concentration of PVME increased in the blend. Knowing only the free‐volume parameters for the pure polymers, the free‐volume theory was successfully applied to predict the dependence of the diffusion coefficients on the blend composition. Transport in blends above the glass transition temperature is controlled by free volume, and the effect of concentration fluctuations is minimal at the temperatures studied. Experimental data show an increase in the partition coefficient of some solvents in the blends with respect to the pure polymers. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2071–2082, 2007