bluuebunny/crossref_metadata_2025_split huggingface dataset:
An improved equivalent circuit model for predicting the transmission characteristics of spiral inductors on GaAs substrates
Authors: Pan S. J. , Li L. W. , Yin W. Y. , Leong M. S. 
Published: August 2002

AbstractAn improved equivalent lumped‐element circuit model for predicting the transmission characteristics of spiral inductors is presented in this Letter. The improved model can simulate the forward transmission coefficient more accurately than the traditional model. By adding a shunt RC arm, the effects of the substrate, which become dominant at high frequencies, are well taken into account. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 35–37, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10365
Numerical modeling of microstriplines with substrates with arbitrarily varying thickness with the use of the TLM method
Authors: Ahyoud S. , El Moussaoui A. , Essaaidi M. , Khalladi M. 
Published: August 2002

AbstractThe symmetrical condensed‐node TLM method is used for the analysis of microstrip lines with substrates of arbitrary varying thickness. This numerical technique has been efficiently used for the computation of the propagation constant and the characteristic impedance of this structure. Moreover, it has been demonstrated that the shape of the microstrip substrate is also an important parameter for controlling the values of its characteristic impedance. The validity of the obtained results is proved by comparisons with those obtained from the literature. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 48–51, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10369
Analysis of the blocking performance of hybrid OCDM‐WDM transport networks
Authors: Mutafungwa Edward , Halme Seppo J. 
Published: August 2002

AbstractThis study focuses on the blocking performance of hybrid optical code‐division multiplexing wavelength‐division multiplexing (OCDM‐WDM) networks under dynamic traffic conditions. Novel lightpath concepts for those hybrid networks are introduced. Simulation of the blocking performance for different lightpath concepts indicate that networks upgraded with wavelength converters offer the best performance. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 61–68, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10374
Global analysis and realization of a wideband array (250 500 MHz) for RCS measurements in an anechoic chamber
Authors: Poey P. , Azevedo D. , Begaud X. , Daniel J. P. , Le Ray G. 
Published: August 2002

AbstractA dual‐polarized array operating in the 250–500‐MHz frequency range is analyzed and realized for RCS measurements in an anechoic chamber. The elementary dual‐polarized source is presented, and then the array is completely analyzed with a parallel code solver. A comparison between computed and experimental results is given for the source impedance and radiation patterns of the array. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 34: 68–70, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10375
Nondestructive determination of the longitudinal chromatic dispersion distribution along an optical fiber
Authors: Wai P. K. A. , Moldoveanu F. , Chen H. H. , Tsang Y. K. 
Published: August 2002

AbstractA novel nondestructive technique is proposed to determine the longitudinal dispersion profile of an optical fiber which make uses of the output waveforms of the optical fiber from a set of input pulses and an optimization algorithm. The feasibility of the proposed method is demonstrated numerically. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 312–314, 2001.
On the capacitance and conductance calculations of integrated‐circuit interconnects with thick conductors
Authors: Ymeri Hasan , Nauwelaers Bart , Maex Karen 
Published: August 2002

AbstractIn this paper, a method for computing the capacitance and conductance matrices of multiconductor IC interconnects in a multilayered dielectric region is presented. The number of conductors and the number of dielectric layers are arbitrary. The conductors are very thick (as usual for on‐chip interconnects), and can be placed anywhere in the structure. The formulation is obtained by using a semianalytic Green's function of multilayer structures, which is integrated to a series expansion, valid for charge‐density distribution on the conductors. In addition, the quasianalytical evaluation of the entries of the Galerkin matrix leads to a very efficient and accurate computer code. The accuracy of the suggested method is validated by comparing it with the rigorous simulation data obtained from full‐wave solvers and the CAD‐oriented equivalent‐circuit approach. In our research, we have validated the capacitance and conductance matrices of interconnects on lossy silicon substrate over a wide range of frequencies up to 20 GHz. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 335–339, 2001.
A novel F‐probe‐fed broadband patch antenna
Authors: Ooi B. L. , Lee C. L. , Kooi P. S. 
Published: August 2002

AbstractThe characteristics of a novel rectangular patch with an offset F‐shaped probe are investigated. The patch height is approximately 9% of the designed wavelength. An impedance bandwidth of 36% and an average measured gain of approximately 5 dBi can be achieved for the first dominant mode. There is an additional higher order mode band, which extends the overall impedance bandwidth to 64% and provides an average measured gain of approximately 3 dBi. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 355–356, 2001.
Propagation‐parameter mapping method for efficient simulation of in‐line amplified transmission
Authors: Kim Yongwon , Lee Myungmoon , Lee Jintae , Yu Jinwoo 
Published: August 2002

AbstractIn this paper, a propagation parameter‐mapping method for an efficient simulation to evaluate the performance of in‐line optical amplified transmission line is proposed. The method helps to extract the propagation parameters for simplified simulation from both a single‐channel and a WDM transmission line. It has been shown in the simulation results that the simplified simulation can describe the propagation behavior of optical pulses very accurately, with less than only 3% difference in the eye‐opening ratio when compared with the normal simulation method, but with a great reduction of calculation time. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 364–368, 2001.
A possible role for spontaneous interleukin‐8 production by acute myeloid leukemic cells in angiogenesis related processes: Work in progress
Authors: de Bont Eveline S.J.M. , Vellenga Edo , Molema Grietje , van Wering Elisabeth , de Leij Lou F.M.H. , Kamps Willem A. 
Published: August 2002

AbstractBackgroundRecently, the role of inter‐leukin‐8 (IL‐8) in angiogenesis was reported. We consequently addressed here the question whether IL‐8 produced by acute myeloid leukemia (AML) blasts might have a comparable function.ProcedureIn 21 pediatric patients with AML the role of AML derived IL‐8 in angiogenesis related processes were investigated. Therefore, IL‐8 protein and mRNA expression were measured and endothelial cell (EC) migration and proliferation assays were performed. In addition, bFGF and VEGF mRNA expression were measured by RT‐PCR.ResultsIn the supernatant of the AML blasts, IL‐8 protein was present in a varying amount (median 0.86 μgL, range: 0.1–320 μg/L) and confirmed by RT–PCR. Normal bone marrow mononuclear cells secreted a significant lower amount of IL‐8 protein (median: 0.053 μg/L, range: 0.023–0.055 μg/L, P = 0.007).Seven of the 17 tested AML supernatants induced a varying low amount of EC proliferation compared to control media, which was not inhibited by anti‐IL‐8 antibodies. In contrast, in the EC migration assay, 15 out of the 17 AML supernatants tested, showed an increased EC migration (median fold increase: 1.97, range: 0.66–6.36, P = 0.002) compared to control medium. The increase in EC migration could partially be blocked by anti‐IL‐8 in 59% of the cases (18% decrease, range 0–62%, P = 0.003). Other contributors for the increase in EC migration were also determined. Vascular endothelial growth factor (VEGF) transcripts by RT‐PCR were demonstrated in six out of the nine tested AML cases, while no transcripts for basic fibroblast growth factor (VEGF) could be shown.ConclusionsNeutralizing anti IL‐8 antibodies inhibit EC migration when stimulated with AML supernatant. This suggests a facilitating role for AML‐derived IL‐8 in an important step in angiogenesis. Med Pediatr Oncol 2001;37:511–517. © 2001 Wiley‐Liss, Inc.
Configuration and conformation of a novel uridine analogue: 1H and 13C NMR spectra of (5'S)‐1‐[2'‐(2‐hydroxyethyl)tetrahydropyran‐5'‐yl]‐1H‐pyrimidine‐2,4‐dione
Authors: Balayiannis George , Papaioannou Dionissios , Troganis Anastassios 
Published: August 2002

AbstractA combination of homo‐ and heteronuclear 1D and 2D NMR techniques provided the assignment of the 1H and 13C resonances of the major component of a reaction product consisting of the two possible diastereomers of (5′S)‐1‐[2′‐(2‐hydroxyethyl)tetrahydropyran‐5′‐yl]‐1H‐pyrimidine‐2,4‐dione and showed that the tetrahydropyranyl ring in the major 5′S,2′S‐isomer adopts the twist conformation. Copyright © 2002 John Wiley & Sons, Ltd.
1H, 13C and 15N NMR spectroscopic characterization of unexpected degradation products of the nifedipine analogue bis(2‐cyanoethyl) 2,6‐dimethyl‐4‐(2‐nitrophenyl)‐1,4‐dihydro‐3,5‐pyridinedicarboxylate
Authors: Gössnitzer Edith , Görlitzer Klaus , Baltrusch Hans J. 
Published: August 2002

AbstractIn the course of saponification experiments with bis(2‐cyanoethyl) 2,6‐dimethyl‐4‐(2‐nitrophenyl)‐1,4‐dihydro‐3,5‐pyridinedicarboxylate (1), an analogue of the calcium channel blocker nifedipine, three unexpected degradation products were isolated. The compounds were identified as 3‐(2‐acetamido‐1‐carboxy‐1‐propenyl)‐1‐hydroxy‐2‐indolecarboxylic acid (3), 9‐hydroxy‐1,3‐dimethyl‐β‐carboline‐4‐carboxylic acid (4) and 6‐hydroxy‐2,4‐dimethyl‐5‐oxo‐5,6‐dihydrobenzo[c][2,7]naphthyridine‐1‐carboxylic acid (6). The structures of these compounds were deduced from one‐ and two‐dimensional 1H, 13C and natural abundance 15N NMR experiments (1H,1H‐COSY, gs‐HSQC, gs‐HMBC, 15N gs‐HMBC), and corroborated by comparison of their NMR data with the respective data for structurally similar compounds. Copyright © 2002 John Wiley & Sons, Ltd.
1H, 13C and 31P NMR spectral analysis of monoalkyl (α‐anilinobenzyl)phosphonates and their dipalladium(II) metallocyclic complexes
Authors: Tušek‐Božić Ljerka , Lyčka Antonin 
Published: August 2002

AbstractA 1H, 13C and 31P NMR study of monoethyl (HL1) and monobutyl (HL2) esters of (α‐anilinobenzyl)phosphonic acid and their metallocyclic dipalladium complexes (Pd2L4,L = L1, L2) in DMSO‐d6 was performed, based on 1D and 2D homo‐ and heteronuclear experiments including 1H,13C,31P,APT,1H–1H COSY, 1H–13C COSY, gs‐HMQC and gs‐HMBC NMR techniques. The results obtained are discussed with respect to those for some palladium(II) complexes reported for various anilinobenzylphosphonate derivatives. Copyright © 2002 John Wiley & Sons, Ltd.
15N NMR spectroscopy of 3‐substituted 5‐trichloromethyl‐1,2‐dimethyl‐1H‐pyrazolium chlorides
Authors: Martins Marcos A. P. , Pereira Claudio M. P. , Sinhorin Adilson P. , Rosa Adriano , Zimmermann Nilo E. K. , Bonacorso Helio G. , Zanatta Nilo 
Published: August 2002

Abstract15N NMR data of a series of 3‐alkyl[aryl] substituted 5‐trichloromethyl‐1,2‐dimethyl‐1H‐pyrazolium chlorides (where the 3‐substituents are H, Me, Et, n‐Pr, n‐Bu, n‐Pe, n‐Hex, (CH2)5CO2Et, CH2Br, Ph and 4‐Br‐C6H4), are reported. The 15N substituent chemical shifts (SCS) parameters are determined and these data are compared with the 13C SCS values and data obtained by MO calculations. Copyright © 2002 John Wiley & Sons, Ltd.
NMDA receptor and neonatal hypoxic brain injury
Authors: Mishra Om P. , Fritz Karen I. , Delivoria‐Papadopoulos Maria 
Published: August 2002

AbstractThe NMDA‐type glutamate receptor is a predominant mediator of excitotoxicity in the immature brain due to overexpression of the receptor in the developing brain. Within the development period however, the extent of NMDA receptor mediated processes including hypoxia‐induced excitotoxicity may depend on the ontogeny of the NMDA receptor recognition and modulation sites, and subunits leading to altered function of the ion‐channel comples. The function of the receptor may be modified by intracellular mechanisms such as phosphorylation/dephosphorylation, nitration, and generation of free radicals including nitric oxide. The susceptibility of the developing brain to hypoxia depends on several factors: the lipid composition of the brain cell membrane; the rate of membrane lipid peroxidation and the status of anti‐oxidant defenses; the development and modulation of the NMDA receptor sites; the intracellular Ca2+ influx mechanisms; expression of apoptotic and antiapoptotic genes such as Bax and Bcl‐2; and the activation of initiator caspases and caspase‐3, the “executioner” of cell death. The developmental status of these cellular mechanisms and their response to hypoxia determine the fate of the hypoxic cell in the developing brain in the fetus and the newborn. MRDD Research Reviews 2001;7:249–253. © 2001 Wiley‐Liss, Inc.
Solenoidal array coils
Authors: Su Sunyu , Zou Mark Xueming , Murphy‐Boesch Joseph 
Published: August 2002

AbstractNew concepts are presented for inherent decoupling of multi‐element solenoidal arrays. First, an uneven counter‐rotational (UCR) coil is reported in which two counter‐rotational sections are wound unevenly, resulting in a quasi‐one‐peak sensitivity profile with a null‐B1 point. Adding a second solenoid element near the null‐B1 point forms an inherently‐decoupled solenoidal array. Unlike a sandwiched solenoidal array, an UCR solenoidal array allows for signal contribution at the center from both solenoid elements. Second, a double counter‐rotational (DCR) coil is presented in which two null‐B1 points are formed by having one counter‐rotational winding on each side of the coil. Two solenoidal elements can be added to form a solenoidal array. Finally, more solenoid elements can be added to the array provided that the added coil elements are DCR elements. These DCR coil elements can be used as building blocks for more complex solenoidal arrays. These concepts are illustrated using numerical simulations and tested using prototype coils. Magn Reson Med 47:794–799, 2002. © 2002 Wiley‐Liss, Inc.
Quantitative analysis of adiabatic fast passage for steady laminar and turbulent flows
Authors: Gach H. Michael , Kam Anthony W. , Reid Eric D. , Talagala S. Lalith 
Published: August 2002

AbstractAdiabatic fast passage (AFP) is used in noninvasive quantitative perfusion experiments to invert (or label) arterial spins. Continuous arterial spin labeling (CASL) experiments conducted in vivo often assume the inversion efficiency based on the labeling field and steady flow conditions, without direct verification. In practice, the labeling field used in CASL is often amplitude‐ and duty cycle‐limited due to hardware or specific absorption rate constraints. In this study, the effects of the labeling field amplitude and duty cycle, and flow dynamics on the inversion efficiency of AFP were examined under steady flow conditions in a saline flow phantom. The experimental results were in general agreement with models based on Zhernovoi's theory except at high labeling field amplitudes, when the spin inversion times are at least half of the duration of the labeling pulse. The nonlinear relation observed between the inversion efficiency and the labeling duty cycle implies that the practice of linear derating the inversion efficiency with the labeling duty cycle may be prone to significant error. A secondary finding was that the T1 of the flowing fluid could be calculated based on the flow dynamics after varying the flow rate. Magn Reson Med 47:709–719, 2002. © 2002 Wiley‐Liss, Inc.
Comparison of functional MRI image realignment tools using a computer‐generated phantom
Authors: Morgan Victoria L. , Pickens David R. , Hartmann Steven L. , Price Ronald R. 
Published: August 2002

AbstractThis study discusses the development of a computer‐generated phantom to compare the effects of image realignment programs on functional MRI (fMRI) pixel activation. The phantom is a whole‐head MRI volume with added random noise, activation, and motion. It allows simulation of realistic head motions with controlled areas of activation. Without motion, the phantom shows the effects of realignment on motion‐free data sets. Prior to realignment, the phantom illustrates some activation corruption due to motion. Finally, three widely used realignment packages are examined. The results showed that the most accurate algorithms are able to increase specificity through accurate realignment while maintaining sensitivity through effective resampling techniques. In fact, accurate realignment alone is not a powerful indicator of the most effective algorithm in terms of true activation. Magn Reson Med 46:510–514, 2001. © 2001 Wiley‐Liss, Inc.
Study of evolution of shear band systems in sand retained by flexible wall
Authors: Leśniewska Danuta , Mróz Zenon 
Published: August 2002

AbstractThe present paper is concerned with the study of the evolution of regular patterns of shear bands observed experimentally (cf. Milligan, 1974), and provides an extension of the previous work published by the same authors. The purpose of this paper is to present an improved version of a simple theoretical model, derived basically from a classical equilibrium of the Coulomb wedge. This model constitutes a modified version of an extension of the classical Coulomb wedge analysis by assuming that soil parameters are varying during the deformation process and the initial configuration at which limit equilibrium occurs evolves toward a new equilibrium configuration. The application of the model in the analysis of shear band pattern observed in dredged model tests on cantilever walls provided realistic simulation of consecutive shear band formation. Copyright © 2001 John Wiley & Sons, Ltd.
A decision support system for telecommunications
Authors: Flynn Paul , Curran Kevin , Lunney Tom 
Published: August 2002

AbstractWe have built a Decision Support System (DSS) which can to aid strategic management within the industry in making vital decisions in relation to Customer and Network profiles. This enables managers in the respective areas within the industry to fully utilise the vast amounts of data available to make projections and decisions in relation to utilisation of valuable resources. Copyright © 2002 John Wiley & Sons, Ltd.
Muscle‐derived neurotrophin‐3 reduces injury‐induced proprioceptive degeneration in neonatal mice
Authors: Wright D. E. , Williams J. M. , McDonald J. T. , Carlsten J. A. , Taylor M. D. 
Published: August 2002

AbstractDuring perinatal development, proprioceptive muscle afferents are quite sensitive to nerve injury. Here, we have used transgenic mice that overexpress neurotrophin‐3 (NT‐3) in skeletal muscle (myo/NT‐3 mice) to explore whether NT‐3 plays a neuroprotective role for perinatal muscle afferents following nerve injury. Measurements of NT‐3 mRNA using RT‐PCR revealed that levels of endogenous NT‐3 mRNA in wild‐type muscles remained constant during the first postnatal week following nerve crush or nerve section on postnatal day (PN) 1. In comparison, myo/NT‐3 mice had significantly elevated levels of NT‐3 mRNA that were maintained or increased following injury. To assess whether muscle‐derived NT‐3 could prevent injury‐induced neuronal death, neuron survival in the DRG was analyzed in mice 5 days after sciatic nerve crush on PN3. Retrograde prelabeling of muscle afferents and parvalbumin immunocytochemistry both revealed that overexpression of NT‐3 in muscle significantly reduced neuronal loss following injury. Similar neuroprotective effects of NT‐3 were observed in wild‐type mice injected with exogenous NT‐3 in the gastrocnemius muscles. To test whether NT‐3 could prevent muscle spindle degeneration, spindle number and morphology were assessed 3 weeks after sciatic nerve crush or section on PN1. No spindles were present in either wildtype or myo/NT‐3 muscles after nerve section, demonstrating that NT‐3 overexpression cannot maintain spindles following complete denervation. Moreover, NT‐3 overexpression could not prevent moderate spindle loss in muscle and did not stimulate new spindle formation following nerve crush. Our results demonstrate that in addition to its early actions on sensory neuron generation and naturally occurring cell death, NT‐3 has important neuroprotective effects on muscle afferents during postnatal development. © 2002 Wiley Periodicals, Inc. J Neurobiol 50: 198–208, 2002; DOI 10.1002/neu.10024
Septum volume and food‐storing behavior are related in parids
Authors: Shiflett Michael W. , Gould Kristy L. , Smulders Tom V. , DeVoogd Timothy J. 
Published: August 2002

AbstractThe hippocampal formation (HF) of food‐storing birds is larger than non‐storing species, and the size of the HF in food‐storing Black‐Capped Chickadees (Poecile atricapillus) varies seasonally. We examined whether the volume of the septum, a medial forebrain structure that shares reciprocal connections with the HF, demonstrates the same species and seasonal variation as has been shown in the HF. We compared septum volume in three parid species; non‐storing Blue Tits (Parus caeruleus) and Great Tits (Parus major), and food‐storing Black‐Capped Chickadees. We found the relative septum volume to be larger in chickadees than in the non‐storing species. We also compared septum and nucleus of the diagonal band (NDB) volume of Black‐Capped Chickadees at different times of the year. We found that the relative septum volume varies seasonally in food‐storing birds. The volume of the NDB does not vary seasonally. Due to the observed species and seasonal variation, the septum, like the hippocampal formation of food‐storing birds, may be specialized for some aspects of food‐storing and spatial memory. © 2002 Wiley Periodicals, Inc. J Neurobiol 51: 215–222, 2002
Stability analysis of cylindrical shells using refined non‐conforming rectangular cylindrical shell elements
Authors: Shaoyan Zhang , Cheung Y. K. , Wanji Chen 
Published: August 2002

AbstractThe accuracy of stability analysis depends on the accuracy of both the element stiffness matrix and geometry stiffness matrix. Therefore, when carrying out the stability analysis of thin cylindrical shells using the finite element methods will require, firstly, a refined non‐conforming rectangular curved cylindrical shell element RCSR4 is proposed according to the refined non‐conforming FE method, in which both the C1 and C0 weak continuity conditions are satisfied and as a result, can ensure the convergence of computation. At the same time, a refined geometrical stiffness matrix is introduced to replace the standard consistent geometrical stiffness matrix. Simple expressions of the refined constant strain matrices with adjustable constants are introduced with respect to the weak continuity conditions. Numerical examples are presented to show that the present method can indeed improve the performance and the accuracy in stability analysis. Copyright © 2001 John Wiley & Sons, Ltd.