bluuebunny/crossref_metadata_2025_split huggingface dataset:
A new and explicit matrix input impedance formula for the H‐shaped microstrip patch antenna
Authors: Ooi S. F. , Lee S. K. , Sambell A. , Korolkiewicz E. , Scott S. 
Published: April 2007

AbstractIn this letter, a new and explicit matrix input impedance formula for the H‐shaped microstrip patch antenna with a probe feed together with new coupling impedance formulas are presented. A compact H‐shaped antenna operating at 2.45 GHz has been designed and tested. Good agreement for the input impedance and the return loss has been obtained for the predicted, simulated, and measured results. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1756–1759, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22525
Guided modes in a grounded slab waveguide of uniaxially anisotropic left‐handed material
Authors: Liu Songhua , Chen Liang , Liang Changhong 
Published: April 2007

AbstractThe guidance conditions of TE and TM waves with both real and imaginary transverse wave numbers in a grounded slab waveguide of uniaxially anisotropic left‐handed material are derived. The mode properties for guided TE waves, such as the existence of guided modes, the number of possible modes and the mode cutoffs are analyzed in different cases graphically. Furthermore, we come into some new conclusions different from the mode properties in an isotropic LHM slab. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1644–1648, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22531
Compact wide band monopolar patch antenna
Authors: Lau Pui‐Yi , Yung Edward K. N. 
Published: April 2007

AbstractA compact wideband monopolar patch antenna, which is resonated by a multioperating structure, is presented. The multioperating structured antenna is constructed by a crossshape copper plate folded as an upward cap, excited by a square disc coupling feed. Without the folded upward wall, the antenna exhibits about 30% impedance bandwidth (SWR < 2). The upward wall provides an extra impedance bandwidth in the lower band. By choosing the certain height of the upward wall, the bandwidth can be enhanced appreciably up to 76% (SWR < 2) from 1.74 to 3.87 GHz. The antenna exhibits a stable gain around 4 dBi and radiation patterns in the whole operating frequency. The resonance length reduction is 63% when compared with the conventional TM01 mode (one wave length) patch antenna. Experimental results show a good agreement with the simulation results obtained by IE3D.© 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1581–1585, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22535
An efficient sparse approximate inverse preconditioning for FMM implementation
Authors: Rui P. L. , Chen R. S. 
Published: April 2007

AbstractFor efficiently solving large dense complex linear systems that arise in electric field integral equations (EFIE) of electromagnetic scattering problems, the fast multipole method (FMM) is used to accelerate the matrix‐vector product operations, and the sparse approximate inverse (SAI) preconditioning technique is employed to speed up the convergence rate of the Krylov iterations. A good quality SAI preconditioner in the FMM context is constructed based on the near‐field matrix of the EFIE. The main purpose of this paper is to show that the quality of the SAI preconditioner can be greatly improved by use of information from FMM implementation. Numerical experiments indicate that the resulted SAI preconditioner is very effective with FMM and can reduce the overall simulation time significantly. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1746–1750, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22538
Multifrequency characteristics of sinc shaped microstrip patch antenna
Authors: Gupta Nisha , Mishra Mrinal , Kotha Suneel Chandra , Kiran Yalamanchili 
Published: April 2007

AbstractCharacteristics of a single‐layer, multi‐frequency microstrip patch antenna, which uses a Sinc shaped microstrip patch configuration, are studied. This antenna is capable of providing good impedance matching at all frequencies without tuning the feed position and other design parameters. A parametric study is conducted using commercial software IE3D, based on method of moments (MoM) algorithm. The effects of various antenna parameters on resonant frequencies of the antenna are analyzed and discussed. Similar radiation patterns are obtained at three resonant frequencies. A prototype with dimensions based on the simulations is built and tested. A comparison between the measured and simulated results shows good agreement. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1673–1675, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22541
Two‐dimensional efficient metamaterial‐inspired electrically‐small antenna
Authors: Erentok Aycan , Ziolkowski Richard W. 
Published: April 2007

AbstractInexpensive, efficient, and electrically‐small antenna designs are presented, which are based on a two‐dimensional (2D) metamaterial‐inspired structure driven by an electrically‐small rectangular semiloop antenna that is coaxially‐fed through a finite PEC ground plane. Measured reflection coefficients showed a very good agreement with the simulated data, where the measured resonant frequency is only 0.5% different from the numerically predicted value. The proposed 2D antenna systems are linearly scalable with frequency, and predicted radiation characteristics of the antenna systems at 300, 430, and 1580 MHz are reported. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1669–1673, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22542
Electromagnetic field measurements of radio transmitters in urban area and exposure analysis
Authors: Ozen Sukru , Helhel Selcuk , Colak O. Halil 
Published: April 2007

AbstractFar field measurement of electric fields in an area surrounding the GSM, and TV broadcast stations in Antalya (Turkey) is presented. A great inclination to use of mobile phones as well as FM radios and TV transmitters has brought about a proliferation of new radio base stations. Lack of public information and scientific studies carried out at limit values cause a spite against radio companies. Collected data through out Antalya City demonstrates that radio emissions are about at most 10% of limit values for GSM transmitters, while it is about 50% of limit values for TV transmitters. Results show that 164 MHz radio transmitter (∼1.1 mW/kg) produces about 60 times stronger local SAR than 1800 MHz GSM transmitter (∼0.02 mW/kg), and children are more sensitive than average‐man for the same electric field intensity, and gather more SAR values.© 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1572–1578, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22548
Analysis and design of cross‐coupled single mode dielectric resonator cavity filter
Authors: Sun Xiaoguang , Sun Jianmin 
Published: April 2007

AbstractA kind of cross‐coupled bandpass filter constructed by placing ring‐type dielectric resonators inside the metallic cavities is described in this article. This cross‐coupled filter is designed as a six‐pole quasi‐elliptic function bandpass prototype with two transmission zeros symmetrically below and above passband, respectively. The coupling matrix of this prototype has been calculated and the effect of cross‐coupling coefficient has also been investigated. Practical realization of the filter is discussed in detail and the measured response has good agreement with the analysis. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1744–1746, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22550
Multimode fiber ring‐down pressure sensor
Authors: Qiu Huiye , Qiu Yishen , Chen Zhihao , Fu Baoyu , Chen Xiyao , Li Gaoming 
Published: April 2007

AbstractA fiber‐loop ring‐down spectroscopy based on multimode fiber is proposed for pressure measurement. It has been found that the multimode fiber‐loop ring‐down pressure sensor has higher sensitivity and larger dynamic range up to 6.2 × 107 Pa compared to the single mode counterpart. Good stability and repeatability of the sensor are also demonstrated. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1698–1700, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22553
Color pattern recognition using image encoding joint transform correlator
Authors: Lee Chungcheng , Chen Chulung 
Published: April 2007

AbstractA color pattern recognition scheme with encoding technique based on the nonzero order joint transform correlator is proposed. Each color target image is organized as a new grayscale encoded image. A Lagrange multipliers approach is also used to design an optimized synthetic reference function. A joint transform power spectrum subtraction method is applied to remove the zero order terms in addition. Simulation results verify the performance of the proposed technique. This correlator can reduce the channel number in the input and still maintain good ability in color image recognition. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1665–1669, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22554
MRS quality assessment in a multicentre study on MRS‐based classification of brain tumours
Authors: van der Graaf Marinette , Julià‐Sapé Margarida , Howe Franklyn A. , Ziegler Anne , Majós Carles , Moreno‐Torres Angel , Rijpkema Mark , Acosta Dionisio , Opstad Kirstie S. , van der Meulen Yvonne M. , Arús Carles , Heerschap Arend 
Published: April 2007

AbstractThis paper reports on quality assessment of MRS in the European Union‐funded multicentre project INTERPRET (International Network for Pattern Recognition of Tumours Using Magnetic Resonance; http://azizu.uab.es/INTERPRET), which has developed brain tumour classification software using in vivo proton MR spectra. The quality assessment consisted of both MR system quality assurance (SQA) and quality control (QC) of spectral data acquired from patients and healthy volunteers. The system performance of the MR spectrometers at all participating centres was checked bimonthly by a short measurement protocol using a specially designed INTERPRET phantom. In addition, a more extended SQA protocol was performed yearly and after each hardware or software upgrade. To compare the system performance for in vivo measurements, each centre acquired MR spectra from the brain of five healthy volunteers. All MR systems fulfilled generally accepted minimal system performance for brain MRS during the entire data acquisition period. The QC procedure of the MR spectra in the database comprised automatic determination of the signal‐to‐noise ratio (SNR) in a water‐suppressed spectrum and of the line width of the water resonance (water band width, WBW) in the corresponding non‐suppressed spectrum. Values of SNR > 10 and WBW < 8 Hz at 1.5 T were determined empirically as conservative threshold levels required for spectra to be of acceptable quality. These thresholds only hold for SNR and WBW values using the definitions and data processing described in this article. A final QC check consisted of visual inspection of each clinically validated water‐suppressed metabolite spectrum by two, or, in the case of disagreement, three, experienced MR spectroscopists, to detect artefacts such as large baseline distortions, exceptionally broadened metabolite peaks, insufficient removal of the water line, large phase errors, and signals originating from outside the voxel. In the end, 10% of 889 spectra with completed spectroscopic judgement were discarded. Copyright © 2007 John Wiley & Sons, Ltd.
Numerical solution of parametrized Navier–Stokes equations by reduced basis methods
Authors: Quarteroni Alfio , Rozza Gianluigi 
Published: April 2007

AbstractWe apply the reduced basis method to solve Navier–Stokes equations in parametrized domains. Special attention is devoted to the treatment of the parametrized nonlinear transport term in the reduced basis framework, including the case of nonaffine parametric dependence that is treated by an empirical interpolation method. This method features (i) a rapid global convergence owing to the property of the Galerkin projection onto a space WN spanned by solutions of the governing partial differential equation at N (optimally) selected points in the parameter space, and (ii) the offline/online computational procedures that decouple the generation and projection stages of the approximation process.This method is well suited for the repeated and rapid evaluations required in the context of parameter estimation, design, optimization, and real‐time control. Our analysis focuses on: (i) the pressure treatment of incompressible Navier–Stokes problem; (ii) the fulfillment of an equivalent inf–sup condition to guarantee the stability of the reduced basis solutions. The applications that we consider involve parametrized geometries, like e.g. a channel with curved upper wall or an arterial bypass configuration. © 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 23: 923–948, 2007
An iterative substructuring method for the hp‐version of the BEM on quasi‐uniform triangular meshes
Authors: Heuer Norbert , Leydecker Florian , Stephan Ernst P. 
Published: April 2007

AbstractWe study an additive Schwarz based preconditioner for the hp‐version of the boundary element method with quasi‐uniform triangular meshes and for hypersingular integral operators. The model problem is Laplace's equation exterior to an open surface and is generic for elliptic boundary value problems of second order in bounded and unbounded domains with closed or open boundary. The preconditioner is based on a nonoverlapping subspace decomposition into a so‐called wire basket space and interior functions for each element. We prove that the condition number of the preconditioned stiffness matrix has a bound, which is independent of the mesh size h and which grows only polylogarithmically in p, the maximum polynomial degree. Numerical experiments confirm this result. © 2007 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 23: 879–903, 2007
Movement‐to‐music computer technology: a developmental play experience for children with severe physical disabilities
Authors: Tam Cynthia , Schwellnus Heidi , Eaton Ceilidh , Hamdani Yani , Lamont Andrea , Chau Tom 
Published: April 2007

AbstractChildren with severe physical disabilities often lack the physical skills to explore their environment independently, and to play with toys or musical instruments. The movement‐to‐music (MTM) system is an affordable computer system that allows children with limited movements to play and create music. The present study explored parents' experiences of using the MTM system with their children. A qualitative methodology employing in‐depth interview techniques was used with six mothers and their children. The themes extracted from the data were organized under two main concepts of the International Classification of Functioning, Disability, and Health (ICF) (WHO, 2001) framework. The results showed that the MTM expanded horizons for the child along the ICF health dimensions and the MTM had a positive impact on ICF environmental determinants of health. The small sample size should be noted as a limitation of this study. Further research should be carried out with a larger sample of children with restricted mobility to obtain a better understanding of the impact of MTM technology on children's psychosocial development. Copyright © 2007 John Wiley & Sons, Ltd.
The emerging role of ACE2 in physiology and disease
Authors: Hamming I , Cooper ME , Haagmans BL , Hooper NM , Korstanje R , Osterhaus ADME , Timens W , Turner AJ , Navis G , van Goor H 
Published: April 2007

AbstractThe renin–angiotensin–aldosterone system (RAAS) is a key regulator of systemic blood pressure and renal function and a key player in renal and cardiovascular disease. However, its (patho)physiological roles and its architecture are more complex than initially anticipated. Novel RAAS components that may add to our understanding have been discovered in recent years. In particular, the human homologue of ACE (ACE2) has added a higher level of complexity to the RAAS. In a short period of time, ACE2 has been cloned, purified, knocked‐out, knocked‐in; inhibitors have been developed; its 3D structure determined; and new functions have been identified. ACE2 is now implicated in cardiovascular and renal (patho)physiology, diabetes, pregnancy, lung disease and, remarkably, ACE2 serves as a receptor for SARS and NL63 coronaviruses. This review covers available information on the genetic, structural and functional properties of ACE2. Its role in a variety of (patho)physiological conditions and therapeutic options of modulation are discussed. Copyright © 2007 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Medication dosing errors in hospitalized patients with renal impairment: a study in Palestine
Authors: Sweileh Waleed M. , Janem Samah A. , Sawalha Ansam F. , Abu‐Taha Adham S. , Zyoud Sa'ed H. , Sabri Iyad A. , Al‐jabi Samah W. , Jaradat Nidal A. , Zaid Abed Al‐Naser M. 
Published: April 2007

AbstractBackground and AimReduced renal function requires dose adjustment for certain drugs to avoid toxicity. The aim of this study was to determine whether appropriate dosage adjustments were made for drugs that are nephrotoxic, excreted, or metabolized (TEM medications) by the kidney in patients with renal impairment.MethodologyA cross‐sectional study of a group of hospitalized patients was carried out at Al‐Watni governmental hospital, Nablus, Palestine. All patients with creatinine clearance ≤59 ml/min were included in the analysis. Data regarding patients' clinical, laboratory findings and medications whether they were prescribed at hospital or at discharge were collected from patients' medical files. Evaluation of appropriate dosing was based on Physician Disk Reference (PDR). All data were collected for further research and subsequent statistical analysis using statistical package for social sciences (SPSS) for windows version 10.ResultsA total of 78 patients had calculated creatinine clearance ≤59 ml/min. Those patients were prescribed a total of 1001 lines of prescription medication. Dosage adjustment was necessary for 193 TEM medications. Analysis of TEM medications with guidelines for adjustment indicated that 73.58%(142) were found to be inappropriate and 26.42% (51) were found to be appropriate. The most common inappropriate medications were ranitidine, antibiotics, and digoxin. Approximately 77.5% of the unadjusted medications were prescribed during hospitalization.ConclusionIn our study, a wide range of dosing errors was common among patients with renal impairment that was common during hospitalization. Continued medical education in the field of clinical pharmacokinetics is important for physicians. Copyright © 2007 John Wiley & Sons, Ltd.
Differential protein labeling with thiol‐reactive infrared DY‐680 and DY‐780 maleimides and analysis by two‐dimensional gel electrophoresis
Authors: Riederer Irène M. , Riederer Beat M. 
Published: April 2007

AbstractDifferential protein labeling with 2‐DE separation is an effective method for distinguishing differences in the protein composition of two or more protein samples. Here, we report on a sensitive infrared‐based labeling procedure, adding a novel tool to the many labeling possibilities. Defined amounts of newborn and adult mouse brain proteins and tubulin were exposed to maleimide‐conjugated infrared dyes DY‐680 and DY‐780 followed by 1‐ and 2‐DE. The procedure allows amounts of less than 5 µg of cysteine‐labeled protein mixtures to be detected (together with unlabeled proteins) in a single 2‐DE step with an LOD of individual proteins in the femtogram range; however, co‐migration of unlabeled proteins and subsequent general protein stains are necessary for a precise comparison. Nevertheless, the most abundant thiol‐labeled proteins, such as tubulin, were identified by MS, with cysteine‐containing peptides influencing the accuracy of the identification score. Unfortunately, some infrared‐labeled proteins were no longer detectable by Western blots. In conclusion, differential thiol labeling with infrared dyes provides an additional tool for detection of low‐abundant cysteine‐containing proteins and for rapid identification of differences in the protein composition of two sets of protein samples.
Impact of cancer on Moslem patients in Morocco
Authors: Errihani Hassan , Mrabti Hind , Boutayeb Saber , El Ghissassi Ibrahim , El Mesbahi Omar , Hammoudi Mohamed , Chergui Hanaa , Riadi Ahmed 
Published: April 2007

AbstractBackground: The study aims to determine the impact of cancer on Moroccan patients of Moslem faith.Method: Patients included a convenience sample with histological confirmed cancer. Cases with cerebral metastasis or lacking capacity were excluded. Participants were assessed prospectively using a questionnaire covering epidemiological and socio‐economic characteristics, religious affiliation, repercussions of disease on religious beliefs and practices.Results and conclusions: One thousand and six hundred patients (median age 49 years) were approached; 41% females and 74% from rural areas. There was a high rate of illiteracy (38%) and only 7% had higher education. Seventeen per cent were divorced, among whom 41% were divorced after diagnosis of cancer. Eighty‐seven per cent had no medical insurance. All were Muslims; 49% practising believers and 51% non‐practising. In the first group cancer represented a divine test that permitted acceptance of the disease. In the second group of ‘non‐practising believers’, patients reported a feeling of culpability and 95% of them started taking up religious practices, often with extremism and sometimes in contradiction of medical advice. In both groups new behaviours were noticed; 450 women now wore the ‘Hijab’ (scarf), 19% used popular medicine and plants in their diet recommended by the Koran.While these results require replication they indicate changes in behaviour by those within the Moslem faith following a cancer diagnosis. Copyright © 2007 John Wiley & Sons, Ltd.
Thin‐film‐growth characteristics by computer simulation: Nanostructural changes as a function of deposition conditions
Authors: Gholipour Shahraki Mehran , Savaloni Hadi 
Published: April 2007

AbstractA 1 + 1 dimensional computer simulation model for thin‐film deposition based on the ballistic aggregation of hard disks is developed, using the classical Monte Carlo method. The growth of thin metallic (e.g., Ni) and alloy (e.g., Co–Cr) films under different deposition conditions, considering the variation of different parameters, namely, substrate temperature, angle of incidence, substrate surface roughness (including amorphous substrates), and deposition rate, on a (111) face of fcc or a (100) face of hcp substrates is simulated. Results are qualitatively in good agreement with the structure zone model (SZM) predictions. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Non‐equilibrium properties of mesoscopic systems – functional renormalization group approach
Authors: Pruschke Th. , Gezzi R. , Meden V. 
Published: April 2007

AbstractUsing the Keldysh technique for non‐equilibrium interacting many‐particle systems, the concept of the functional renormalization is extended to non‐equilibrium situations. The approach is completely general and thus allows calculations for both stationary and time‐dependent situations. As a specific example we present results for the stationary state transport through a quantum dot with finite bias voltage. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)