bluuebunny/crossref_metadata_2025_split huggingface dataset:
Numerical simulation of the microwave rewarming process of cryopreserved organs
Authors: Han X. , Gao D. Y. , Luo D. , Yu C. , Lu C. C. 
Published: June 2005

AbstractThe rewarming process of cryopreserved organs using microwave technology is analyzed by numerical simulation. The FDTD (finite‐difference time‐domain) method is applied to calculate the electromagnetic field in a real microwave rewarming system, composed by a cylindrical resonant cavity, an antenna source, and a frozen rabbit‐kidney phantom with temperature‐dependent properties. The efficiency of the FDTD codes is improved by nonuniform grid techniques and parallel algorithms. Meanwhile, an apparent specific‐heat method is introduced in the temperature‐field calculation. Coupling the solutions of the two fields is realized by a formerly developed algorithm. The numerical results show that in the rewarming process of the rabbit kidney phantom, the warming rate can reach 300°–500°C/min, which may prevent devitrification, but the maximum temperature difference in the sample (18 mm in radius) can reach 15°C at the end, which may cause severe thermal stress. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 201–205, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20945
Steady‐state analysis of a directional square lattice band‐edge photonic crystal lasers
Authors: Cazo Rogério M. , Barbosa Carmem L. , Hattori Haroldo T. , Schneider Vitor M. 
Published: June 2005

AbstractThe original square‐lattice band‐edge structure emitted light in different directions. In a recent paper [18], we have improved the directivity of these structures by using a honeycomb photonic crystal to shield the original structure. This has improved the performance of such devices, in such a way that light can be coupled directionally to a large waveguide. In this paper, we present a steady‐state analysis of the performance of this directive device and study the amount of power which can be coupled into the waveguide, analyzing its performance as an in‐plane emitter and the limitations caused by vertical losses. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 210–214, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20947
High‐gain printed dipole antenna
Authors: Liu Yung‐Tao , Tseng Ting‐Chih , Wong Kin‐Lu 
Published: June 2005

AbstractA printed dipole antenna showing high gain (about 6.8 dBi) radiation in the azimuthal plane is presented. The dipole antenna has a narrow width of 10 mm and a total length of about 202 mm (with 1.64 wavelengths of the frequency at 2442 MHz, the center frequency of the 2.4‐GHz WLAN band). In each one of the two radiating arms of the dipole antenna, a meandered line is inserted as a phase‐reversal device. With this arrangement, the proposed dipole antenna performs as a collinear array antenna with three in‐phase half‐wavelength radiating elements, leading to constructive radiation in the azimuthal plane and small side lobes in the elevation plane. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 214–218, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20948
Effects of dielectric width extension in a parallel‐plate Blumlein line
Authors: Joler Miroslav , Christodoulou Christos G. , Schamiloglu Edl , Gaudet John 
Published: June 2005

AbstractComputational analyses are performed on a parallel‐plate Blumlein line with a nonstandard width of the dielectric, as a way to mitigate against the dielectric breakdown. We report its effects on the electric field, propagation time of the transient effect, characteristic impedance of the line, and output pulse. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 220–225, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20950
Ultra‐short wavelength filters using mode‐related dispersion in dual‐mode waveguides
Authors: Tsai Tzong‐Yow , Lee Zhi‐Cheng , Chen Jong‐Rong , Chen Chi‐Chung , Fang Yen‐Cheng , Cha Ming‐Hong 
Published: June 2005

AbstractAn ultra‐short‐wavelength filter using photonic band gap (PBG) mode‐related dispersion in a two‐moded waveguide is proposed. It is verified using the finite‐difference time‐domain (FDTD) method, such that two channels on the PBG edges are affected by opposite dispersive effects and can be separated by an ultra‐short coupler length much shorter than the required length without the assistance of PBG dispersion. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 225–227, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20951
Low‐profile omnidirectional circularly polarized antenna for WLAN access points
Authors: Hsiao Fu‐Ren , Wong Kin‐Lu 
Published: June 2005

AbstractA novel low‐profile omnidirectional circularly polarized antenna comprising a top‐loaded cylindrical monopole and four printed arc‐shaped dipoles is presented. The cylindrical monopole and four printed dipoles share a common feeding point and generate two orthogonal polarizations with a 90° phase difference, resulting in omnidirectional circular‐polarization (CP) radiation in the azimuthal plane. The proposed antenna is also arranged in a compact structure with a low profile (less than 0.1 wavelength of the center operating frequency). A constructed prototype suitable for applications in a wireless local area network (WLAN) access point in the 2.4‐GHz band is demonstrated. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 227–231, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20952
Superposition of mode coupling induced by dual acousto‐optic modulations
Authors: Tu Po‐Jen , Liu Wen‐Fung , Chen Tzu‐Chiang 
Published: June 2005

AbstractThe high‐order‐mode coupling of acousto‐optic modulations in a tilted fiber grating is experimentally demonstrated to be greatly enhanced due to the superposition of dual acousto‐optic‐modulations. The performance is based on the phase matching between two acousto‐optic‐modulations of different frequency in a fiber Bragg grating. The device can be applied in a switchable multiwavelength comb filter or a switchable multiwavelength fiber laser. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 231–233, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20953
Analysis of circular patch antenna tuned by a ferrite post
Authors: Mavridis A. A. , Kyriacou G. A. , Sahalos J. N. 
Published: June 2005

AbstractA circular patch antenna tuned by a ferrite post is presented. The DC‐biasing magnetic field is assumed perpendicular to the patch and the ferrite losses are taken into account. Both right‐ and left‐hand circular polarizations are considered. The “perfect magnetic walls” approximation is employed and the resulting closed‐form expressions can be used in the design of patch antennas. Also, this approximate but analytical study offers a clear physical insight with regard to the ferrite effects on the patch antenna's resonance characteristics. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 234–237, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20954
Monopolar divergence‐conforming and curl‐conforming low‐order basis functions for the electromagnetic scattering analysis
Authors: Ubeda Eduard , Rius Juan M. 
Published: June 2005

AbstractIn this paper, we present two new sets of basis functions, which we name monopolar RWG and monopolar nxRWG. These sets are derived from the two conventional divergence‐conforming and curl‐conforming low‐order sets, RWG and nxRWG. For a wide variety of moderately small objects, we show the validity of the monopolar RWG and nxRWG Galerkin MoM‐MFIE discretizations. We show the performance improvement for the monopolar RWG MoM‐MFIE formulation with respect to the conventional choice and the robustness of both conventional and monopolar nxRWG MoM‐MFIE formulations © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 237–241, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20955
A dual‐passband microstrip open‐loop resonator filter
Authors: Ahn Chang‐Soo , Lee Juseop , Kim Young‐Sik 
Published: June 2005

AbstractIn this paper, a design technique that includes a synthesis procedure and a realization method for a microstrip open‐loop resonator filter with two passbands is described. Transmission zeros of the filter‐transfer function are employed to split a single passband into two passbands, and the filter‐coupling structure used to realize two passbands is also given. The measured result shows good agreement with the synthesized one. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 241–243, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20956
Fast analysis of optical waveguides using an improved Fourier series method with perfectly matched layer
Authors: Jia Hongting , Zhang Dan , Yasumoto Kiyotoshi 
Published: June 2005

AbstractA fast method for analyzing optical waveguides with the use of an improved Fourier series method and an absorbing boundary condition of perfectly matched layer (PML) is proposed. The numerical examples show that the computing cost, calculated accuracy, and convergent speed with the PML condition have been saliently improved, as compared to without the PML condition. The validity of the proposed method have been confirmed via comparison with other methods and measurements. The proposed method can be easily extended to 3D problems. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 263–268, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20961
Wideband slot antenna with a novel microstrip feed
Authors: Yao Feng‐Wei , Zhong Shun‐Shi , Wang Wei , Liang Xian‐Ling 
Published: June 2005

AbstractA novel slot antenna of large bandwidth and small size, which is fed by a fan‐shaped microstrip feed with a straight stub, is introduced. The effect of the fan feed on the impedance characteristics is investigated theoretically and experimentally. Good agreement between the theoretical and experimental results is obtained. Its measured VSWR ≤ 2 bandwidth reaches approximately 114%, covering 1.55–5.66 GHz. The measured standing‐wave ratio curves and radiation patterns of the antenna at f = 2 GHz and at f = 5 GHz are both presented. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 275–278, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20964
Microwave dielectric properties of marine DNA based polymers
Authors: Subramanyam Guru , Heckman Emily , Grote James , Hopkins Frank , Neidhard Robert , Nykiel Edward 
Published: June 2005

AbstractDeoxyribonucleic acid (DNA)‐based polymer thin‐films are characterized at microwave frequencies. The dielectric properties of the films are extracted from comparison of the propagation constants of the co‐planar waveguide (CPW) lines on bare MgO substrates and the DNA‐based films on MgO substrates. The insertion loss introduced by an undoped DNA‐based polymer film is only 0.1 dB at 10 GHz and 0.5 dB at 30 GHz. A red‐dye‐doped DNA polymer film exhibited higher losses. The relative dielectric constant of the undoped DNA‐based film averages to 4 at microwave frequencies, and the loss‐tangent is below 0.1 up to 30 GHz. The dielectric properties of a 5% red‐dye‐doped DNA polymer film is compared to that of the pure DNA film. The DR1 doped DNA film exhibits 0.4‐dB higher loss at 10 GHz and 0.9‐dB higher loss at 30 GHz. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 278–282, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20965
PBG‐assisted shared‐aperture dual‐band aperture‐coupled patch antenna for satellite communication
Authors: Karmakar Nemai C. , Mollah Md. N. , Padhi Shantanu K , Fu Jeffrey S. 
Published: June 2005

AbstractDesign and development of a photonic bandgap (PBG)‐assisted shared‐aperture dual‐band orthogonal aperture‐fed rectangular microstrip patch antenna element, which is suitable for a portable very small aperture terminal (VSAT), are presented in this paper. The dual‐band dual‐polarized antenna element achieves 21% input impedance bandwidth at the S‐ and C‐bands. A comparison of the antenna with and without 2D PBG grids shows that the inclusion of PBG structures (PBGSs) improves the antenna performances. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 289–292, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20968
GPS/PCS dual‐band internal antenna with parasitic element
Authors: Harackiewicz Frances J. , Jung Byungwoon , Lee Byungje 
Published: June 2005

AbstractA planar internal antenna for application in GPS/PCS dual‐band mobile phones is proposed and implemented. The proposed antenna has two resonant elements printed on a supporting FR4 substrate with thickness of 0.8 mm: one is the printed monopole element that radiates at a higher frequency and couples electromagnetically to the other element. The other is the printed dipole element that radiates at a lower frequency and is placed around the monopole element. In the proposed antenna, the most important design factor is the dimensional combination of the area occupied by each element so that the antenna provides a wide bandwidth of about 19% for GPS (1575 ± 10 MHz) and Korean PCS (1810 ± 60 MHz) bands, and a gain between −0.5 and 2 dBi for the operating band. The antenna design and experimental results from the actual phone are presented. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 297–301, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20970
Wave representations for SPICE‐type circuit simulators
Authors: Huang Chien‐Chang 
Published: June 2005

AbstractDue to the limitation of nodal‐voltage analysis, wave behaviors such as the S‐parameter representations of the RF/microwave circuits cannot be observed for SPICE‐type circuit simulators. This paper proposes a nodal formulation for the ideal directional coupler to separate the incident and reflected parts of the voltage so the reflection/transmission coefficients can be easily calculated, even in large‐signal conditions. Two simulation examples are given, including a band‐pass filter and a power amplifier in order to demonstrate the availability of the proposed method with confirmation from other microwave‐circuit software. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 301–303, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20971
Erratum: A.E. Serebryannikov, "Mode mixing in an almost periodic azimuthally corrugated cavity," Microwave and Optical Technology Letters (2003) 37(6) 461–465
Authors: Serebryannikov A. E. 
Published: June 2005

AbstractThe original article to which this Erratum refers was published in Microwave and Optical Technology Letters (2003) 37(6) 461–465. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 303, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20972
A hybrid genetic algorithm for the weight setting problem in OSPF/IS‐IS routing
Authors: Buriol L.S. , Resende M.G.C. , Ribeiro C.C. , Thorup M. 
Published: June 2005

AbstractIntradomain traffic engineering aims to make more efficient use of network resources within an autonomous system. Interior Gateway Protocols such as OSPF (Open Shortest Path First) and IS‐IS (Intermediate System‐Intermediate System) are commonly used to select the paths along which traffic is routed within an autonomous system. These routing protocols direct traffic based on link weights assigned by the network operator. Each router in the autonomous system computes shortest paths and creates destination tables used to direct each packet to the next router on the path to its final destination. Given a set of traffic demands between origin‐destination pairs, the OSPF weight setting problem consists of determining weights to be assigned to the links so as to optimize a cost function, typically associated with a network congestion measure. In this article, we propose a genetic algorithm with a local improvement procedure for the OSPF weight‐setting problem. The local improvement procedure makes use of an efficient dynamic shortest path algorithm to recompute shortest paths after the modification of link weights. We test the algorithm on a set of real and synthetic test problems, and show that it produces near‐optimal solutions. We compare the hybrid algorithm with other algorithms for this problem illustrating its efficiency and robustness. © 2005 Wiley Periodicals, Inc. NETWORKS, Vol. 46(1), 36–56 2005
Competitive routing in multicast communications
Authors: Boulogne Thomas , Altman E. 
Published: June 2005

AbstractWe consider competitive routing in multicast networks from a noncooperative game theoretical perspective. There areNusers sharing a network, and each has to send a quantity of packets to a different set of addressees (each address must receive the same packets). To do this the user has only to send one copy of a packet, the network making the duplications of the packets at appropriate nodes (depending on the chosen trees). The routing choice of a user is how to split its flow between different multicast trees. We present different criteria for optimization of this type of game. We treat two specific networks and establish the uniqueness of the Nash equilibrium in these networks, as well as the uniqueness of link utilization at Nash equilibria for specific cost functions in networks with general topology. We also present a result for convergence to equilibria from an initial nonequilibrium state. © 2005 Wiley Periodicals, Inc. NETWORKS, Vol. 46(1), 22–35 2005
An approximation algorithm for Stackelberg network pricing
Authors: Roch Sébastien , Savard Gilles , Marcotte Patrice 
Published: June 2005

AbstractWe consider the problem of maximizing the revenue raised from tolls set on the arcs of a transportation network, under the constraint that users are assigned to toll‐compatible shortest paths. We first prove that this problem is strongly NP‐hard. We then provide a polynomial time algorithm with a worst‐case precision guarantee of ${{1 \over 2}\log_2 m_T+1}$, where mT denotes the number of toll arcs. Finally, we show that the approximation is tight with respect to a natural relaxation by constructing a family of instances for which the relaxation gap is reached. © 2005 Wiley Periodicals, Inc. NETWORKS, Vol. 46(1), 57–67 2005
Structured matrix methods for CAGD: an application to computing the resultant of polynomials in the Bernstein basis
Authors: Bini Dario A. , Gemignani Luca , Winkler Joab R. 
Published: June 2005

AbstractWe devise a fast fraction‐free algorithm for the computation of the triangular factorization of Bernstein–Bezoutian matrices with entries over an integral domain. Our approach uses the Bareiss fraction‐free variant of Gaussian elimination, suitably modified to take into account the structural properties of Bernstein–Bezoutian matrices. The algorithm can be used to solve problems in algebraic geometry that arise in computer aided geometric design and computer graphics. In particular, an example of the application of this algorithm to the numerical computation of the intersection points of two planar rational Bézier curves is presented. Copyright © 2005 John Wiley & Sons, Ltd.
Rational Krylov matrices and QR steps on Hermitian diagonal‐plus‐semiseparable matrices
Authors: Fasino Dario 
Published: June 2005

AbstractWe prove that the unitary factor appearing in the QR factorization of a suitably defined rational Krylov matrix transforms a Hermitian matrix having pairwise distinct eigenvalues into a diagonal‐plus‐semiseparable form with prescribed diagonal term. This transformation is essentially uniquely defined by its first column. Furthermore, we prove that the set of Hermitian diagonal‐plus‐semiseparable matrices is invariant under QR iteration. These and other results are shown to be the rational counterpart of known facts involving structured matrices related to polynomial computations. Copyright © 2005 John Wiley & Sons, Ltd.
Development and characterization of reactive extruded PVC/polyacrylate blends
Authors: Haba Y. , Narkis M. 
Published: June 2005

AbstractThis paper describes a method to obtain polymer blends by the absorption of a liquid solution of monomer, initiator, and a crosslinking agent in suspension type porous poly(vinyl chloride) (PVC) particles, forming a dry blend. These PVC/monomer dry blends are reactively polymerized in a twin‐screw extruder to obtain the in situ polymerization in a melt state of various blends: PVC/poly(methyl methacrylate) (PVC/PMMA), PVC/poly(vinyl acetate) (PVC/PVAc), PVC/poly(butyl acrylate) (PVC/PBA) and PVC/poly(ethylhexyl acrylate) (PVC/PEHA). Physical PVC/PMMA blends were produced, and the properties of those blends are compared to reactive blends of similar compositions.Owing to the high polymerization temperature (180°C), the polymers formed in this reactive polymerization process have low molecular weight. These short polymer chains plasticize the PVC phase reducing the melt viscosity, glass transition and the static modulus. Reactive blends of PVC/PMMA and PVC/PVAc are more compatible than the reactive PVC/PBA and PVC/PEHA blends. Reactive PVC/PMMA and PVC/PVAc blends are transparent, form single phase morphology, have single glass transition temperature (Tg), and show mechanical properties that are not inferior than that of neat PVC.Reactive PVC/PBA and PVC/PEHA blends are incompatible and two discrete phases are observed in each blend. However, those blends exhibit single glass transition owing to low content of the dispersed phase particles, which is probably too low to be detected by dynamic mechanical thermal analysis (DMTA) as a separate Tg value. The reactive PVC/PEHA show exceptional high elongation at break (∼90%) owing to energy absorption optimized at this dispersed particle size (0.2–0.8 µm). Copyright © 2005 John Wiley & Sons, Ltd.