bluuebunny/crossref_metadata_2025_split huggingface dataset:
Prospective study of 18FDG‐PET in the detection and management of patients with lymph node metastases to the neck from an unknown primary tumor. Results from the DAHANCA‐13 study
Authors: Johansen Jørgen , Buus Simon , Loft Annika , Keiding Susanne , Overgaard Marie , Hansen Hanne Sand , Grau Cai , Bundgaard Troels , Kirkegaard Jørgen , Overgaard Jens 
Published: November 2007

AbstractBackground.The benefit of a complementary fluorodeoxyglucose‐positron emission tomography (FDG‐PET) scan to standard workup for carcinoma of unknown primary (CUP) and metastatic neck lesions was prospectively studied.Methods.Sixty‐seven patients underwent standardized diagnostic workup according to national guidelines including panendoscopies, multiple mucosal biopsies, and diagnostic CT/MRI scans. Median follow‐up was 40 months (range, 2–65 months).Results.In 60 eligible patients, FDG‐PET indicated a primary tumor or metastatic disease in 30 patients (50%). Additional investigations confirmed a primary tumor in 18 patients: hypopharynx in 5, oropharynx in 5, nasopharynx in 2, lung in 1, axilla in 1, bone in 1, rectum in 1, as well as multiple metastatic lesions from CUP in 2 patients. In retrospect, MRI was able to detect 1 of the PET‐detected primaries, leading to an overall detection rate of PET of 29% in CUP. A therapeutic change of treatment was made in 25% as a consequence of FDG‐PET. PET before panendoscopy demonstrated fewer false‐positive pathological foci.Conclusion.FDG‐PET is a valuable tool in addition to conventional extensive workup in CUP and neck metastases. Consequently, FDG‐PET is now recommended as an early diagnostic modality in the workup of these patients. © 2007 Wiley Periodicals, Inc. Head Neck, 2008
Management of the orbit in malignant sinonasal tumors
Authors: Suárez Carlos , Ferlito Alfio , Lund Valerie J. , Silver Carl E. , Fagan Johannes J. , Rodrigo Juan Pablo , Llorente José L. , Cantù Giulio , Politi Massimo , Wei William I. , Rinaldo Alessandra 
Published: November 2007

AbstractMalignant ethmoid and maxillary sinus tumors frequently involve the orbit. Orbital involvement is an important prognostic predictor of recurrence‐free, disease‐specific, and overall survival. Most authors agree that orbital preservation as opposed to orbital exenteration or clearance does not result in significant differences in local recurrence or actuarial survival. The eye can be safely preserved in most patients with ethmoid or maxillary sinus cancer invading the orbital wall, including malignancies that invade the orbital soft tissues with penetration through the periorbita provided that they can be completely dissected away from the orbital fat. Malposition of the globe and nonfunctional eyes frequently result when patients have not had adequate rigid reconstruction of the orbital floor, particularly if they have received postoperative radiotherapy. This underscores the importance of such reconstruction. Isolated defects following orbital exenteration may be reconstructed with a temporalis muscle flap. Microvascular free‐tissue transfer is the best option for repair of defects following orbital exenteration and total maxillectomy, although an obturator still has a role in selected patients. © 2007 Wiley Periodicals, Inc. Head Neck, 2008
Spatial and temporal characteristics of droughts in the western part of Bangladesh
Authors: Shahid Shamsuddin 
Published: November 2007

AbstractSpatial and temporal characteristics of droughts in the western part of Bangladesh have been analysed. Standardized precipitation index method is used to compute the severity of droughts from the rainfall data recorded in 12 rainfall gauge stations for the period of 1961–1999. An artificial neural network is used to estimate missing rainfall data. Geographic Information System (GIS) is used to map the spatial extent of droughts of different severities in multiple time scales. Critical analysis of rainfall is also carried to find the minimum monsoon and dry months rainfall require in different parts of the study area to avoid rainfall deficit. The study shows that the north and north‐western parts of Bangladesh are most vulnerable to droughts. A significant negative relationship between multiple ENSO index and rainfall is observed in some stations. Analysis of seasonal rainfall distribution, rainfall reliability and long‐term rainfall trend is also conducted to aid prediction of future droughts in the area. Copyright © 2007 John Wiley & Sons, Ltd.
Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai‐Tibet
Authors: Wang Genxu , Li Yuanshou , Hu Hongchang , Wang Yibo 
Published: November 2007

AbstractSeasonal changes over 2 years (2004–2006) in soil moisture content (θv) of frozen alpine frost meadow soils of the Qinghai‐Tibet plateau permafrost region under three different levels of vegetation cover were investigated. Vegetation cover and air temperature changes had significant effects (synergistic effect) on θv and its distribution in the soil profile. During periods of soil freezing or thawing, the less the vegetation cover, the quicker the temperature drop or rise of soil water, and the shorter the duration of the soil water freeze–thaw response in the active soil layer. Under 30% and 65% vegetation cover the amplitude of variation in θv during the freezing period was 20–26% greater than that under 93% cover, while during the thawing period, it was 1·5‐ to 40·5‐fold greater. The freezing temperature of the surface soil layer, fTs, was 1·6 °C lower under 30% vegetation cover than under 93% vegetation cover. Changes in vegetation cover of the alpine frost meadow affected θv and its distribution, as well as the relationship between θv and soil temperature (Ts). As vegetation cover decreased, soil water circulation in the active layer increased, and the response to temperature of the water distribution across the soil profile was heightened. The quantity of transitional soil phase water at different depths significantly increased as vegetation cover decreased. The influence of vegetation cover and soil temperature distribution led to a relatively dry soil layer in the middle of the profile (0·70–0·80 m) under high vegetation cover. Alpine meadow θv and its pattern of distribution in the permafrost region were the result of the synergistic effect of air temperature and vegetation cover. Copyright © 2007 John Wiley & Sons, Ltd.
Low loss DC to 50 GHz LTCC SMT package for millimeter wave MMICs
Authors: Ju Inkwon , Yom In‐Bok , Oh Seung‐Hyeub 
Published: November 2007

AbstractThe new vertical transition using the trough line, the slab line, and shielded multilayer coplanar waveguides (SMCPW) in order to implement the DC ∼ 50‐GHz band low loss LTCC hermetic surface mounting (SMT) MMIC package was developed. The trough line, the slab line, and the SMCPWs were employed in order to minimize the discontinuity of the conventional via vertical transition, and the radiation loss and crosstalk. The proposed vertical transition is constructed using the multiple transmission lines of the SMCPW1–trough line–slab line–SMCPW2–SMCPW3. The manufactured LTCC hermetic SMT MMIC package showed a low insertion loss less than 0.6 dB and a reflection loss less than −20 dB in the frequency range from DC to 53 GHz. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 24–29, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22973
Erratum: Differential form approach to the analysis of electromagnetic cloaking and masking
Authors: Teixeira F. L. 
Published: November 2007

AbstractArticle originally published in Microwave Opt Technol Lett 49:2051–2053, 2007. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 264, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22975
Unconditionally stable locally one dimensional wave equation PML algorithm for truncating 2‐D FDTD simulations
Authors: Ramadan Omar 
Published: November 2007

AbstractUnconditionally, stable locally one dimensional (LOD) scalar wave equation (WE) perfectly matched layer (PML) formulations are presented for truncating two dimensional (2‐D) open region finite difference time domain (FDTD) grids. The proposed formulations remove the Courant Friedrichs Lewy (CFL) stability limit of the explicit FDTD algorithm and require solving less field equations as compared with the alternating direction implicit (ADI) WE‐PML formulations. Numerical example carried out in 2‐D domain is included to show the validity of the proposed formulations. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 18–22, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22976
Design of asymmetrical compact microstrip resonator filter with four controllable transmission zeros
Authors: Chiang Yi‐Chyun , Chung Ming‐An 
Published: November 2007

AbstractThis article presents a method of synthesizing a microwave filter consisting of asymmetrical compact microstrip resonators. This filter is compact in size and exhibits a third‐order characteristic in the passband and four controllable transmission zeros on the stop bands to enhance the desired signal rejection. A filter synthesizing method is developed to obtain the appropriate values of filter elements. Then the practical layout of filter is determined with the help of a commercial EM simulator. The efficiency of proposed design concept is verified through the design and measurement of an experimental Ku‐band filter. A prototype is fabricated on the commercial Teflon PCB board with 3% bandwidth. The measured results show about 2 dB insertion loss and greater than 20 dB return loss in the passband. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 42–45, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22977
A new bandpass shielding enclosure of hexagon array for modern portable digital devices
Authors: Chiu Cheng‐Nan , Lai Wei‐Ting 
Published: November 2007

AbstractA new bandpass shielding enclosure (BPSE) made by etching the apertures of a periodic hexagon array on its top and bottom surfaces is proposed for modern portable digital devices having wireless communication functions. The BPSE is required to provide high transmittance at the specified communication band and high shielding effectiveness outside this band, and to have little influence on the radiation characteristics of an internal antenna located inside the enclosure. All three required features are difficult to achieve simultaneously. A prototype of the BPSE was built and studied. Both the simulated and measured results obtained show the promising performance of the BPSE and its potential in practical applications. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 15–18, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22978
Design of novel microstrip low‐pass filter using defected ground structure
Authors: Vágner Petr , Kasal Miroslav 
Published: November 2007

AbstractA novel microstrip low‐pass filter utilizing defected ground structure (DGS) units is presented in this article. A DGS unit is simulated with different physical dimensions in order to show variation of attenuation pole and cut‐off frequency. Next, a low‐pass filter using proposed DGS unit is designed. A method for determining dimensions of microstrip structure and DGS units is proposed. Influence of dimensions of the microstrip structure on filter characteristics is investigated and simulated. Filters of various orders are simulated as well. Selected filter is simulated and experimentally verified. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 10–13, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22982
Novel dual‐band microstrip filter using complementary split‐ring resonators
Authors: Lai Xin , Liang Chang‐Hong , Su Tao , Wu Bian 
Published: November 2007

AbstractOn the basis of the double resonant property of the complementary split‐ring resonators (CSRRs), a novel dual‐band microstrip filter is designed, making use of CSRRs as resonant unit and T‐shaped stub as feeding structure. More than one transmission zeros are formed due to the cross coupling between the CSRR cells and the T‐shaped feeding lines, which have greatly improved the out‐of‐band property. To validate the proposed method, a dual‐band filter with two passbands of 2.4–2.6 GHz and 3.8–4.3 GHz is fabricated and measured, which has a low insertion loss and a high out‐of‐band rejection. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 7–10, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22983
Internal 3G and WLAN/WiMAX antennas integrated in palm‐sized mobile devices
Authors: Su Saou‐Wen , Chou Jui‐Hung 
Published: November 2007

AbstractThe integration of a 3G and a WLAN/WiMAX shorted monopole antenna concealed inside a palm‐sized mobile device for multinetwork operation is presented. The two stamped, metal‐plate antennas are mounted at opposite corners of a shielding case. With proper shorting locations and arrangement of antennas in combination with the shielding case, good isolation between the antennas can be obtained. Analysis of the shielding‐case length and the distance between a conducting element and the antennas on the bandwidth and the isolation is also conducted. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 29–31, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22985
Automated on‐wafer extraction of equivalent‐circuit parameters in thin‐film bulk acoustic wave resonators and substrate
Authors: Campanella Humberto , Nouet Pascal , Uranga Arantxa , de Paco Pedro , Barniol Nuria , Esteve Jaume 
Published: November 2007

AbstractOn‐wafer parameter extraction in thin‐film bulk acoustic wave resonator (FBAR) embedded on its substrate is performed. The extraction algorithm implements a multistep least‐squares optimization strategy, obtaining the equivalent‐circuit parameters of both FBAR and its substrate from experimental data. Compared with previous works, the algorithm enables for model‐based de‐embedding of the FBAR parameters. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 4–7, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22986
Dual band RFID transponder antenna designed for a specific chip without addtional impedance matching network
Authors: Fang Zhijiang , Jin Ronghong , Geng Junping , Sun Jing 
Published: November 2007

AbstractA simple and novel antenna for dual band transponders in RFID application is introduced. The antenna is designed for directly matching a commercial chip without additional impedance matching network. The simulated and measured results of the proposed antenna show that the transponders integrated with this antenna will be able to comply with the ETSI Air Interface standard in UHF band and ISO 18000‐4 Air Interface Standard in microwave band. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 58–60, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22994
Ultra‐wideband COMOS low noise amplifier with simultaneous gain and noise matches
Authors: Liao Hsien‐Yuan , Tseng Ching‐Ming , Chiou Hwann‐Kaeo 
Published: November 2007

AbstractUltrawideband CMOS low noise amplifier (LNA) using lossy LC ladder is proposed. A lossy LC ladder matching network is combined with conventional inductive degeneration and provides both gain and noise match over multioctave bandwidth. The bandwidth is further enhanced by shunt peaking technique. The explicit formulas are derived in this work to determine the values of resistor and LC ladder elements to meet the gain and noise match conditions. The LNA achieves 10.8‐dB gain with a 3‐dB bandwidth from 1.6 to 13.2 GHz and a minimum noise figure of 3.4 dB under the power consumption of 22 mW. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 158–160, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22996
On the relationship among dual‐mode double‐ring and double slot‐ring resonators for wide band‐pass filter design
Authors: Lu Shuh‐Tai , Deng Ping‐Chun , Liu Ji‐Chyun , Wu Tai‐I 
Published: November 2007

AbstractThe novel configurations of dual‐mode double slot‐ring resonator (DMDSRR) are introduced to improve the performance of the dual‐mode double‐ring resonator (DMDRR). To obtain a lower insertion loss (−0.76 dB) higher rejection (−48.21 dB) and wider band (BW about 93.35%) filters using tree‐shaped couples and perturbation stubs are proposed here. Both cascaded DMDSRR structure and Butterworth approximation are studied herein. Simulation results including surface current distributions and frequency responses are presented and discussed. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 117–122, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22998
A compact multiband PIFA with the modified ground plane and shorting plate for wireless communication applications
Authors: Shin Yong‐Sun , Kong Ki‐Bok , Park Seong‐Ook 
Published: November 2007

AbstractA novel compact multiband planar inverted‐F antenna for Bluetooth, satellite digital multimedia broadcasting, wireless broadband, world interoperability for microwave access, and wireless local area network applications is presented. The proposed antenna, fed by a 50‐Ω coaxial line, occupies a compact volume of 24.3 × 8.2 × 2 mm3. The bandwidth is 19.4% (2.28–2.77 GHz) and 47.7% (4.04–6.57 GHz) at VSWR < 2.5, and the measured maximum gain is 4.95 dBi at 6.3 GHz. The commercial electromagnetic software CST Microwave Studio is used to optimize the design parameters and the simulated results are well in agreement with the experimental results reported in this article. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 114–117, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22999
Erratum: Application of the Foldy‐Lax multiple scattering method to the analysis of vias in ball grid arrays and interior layers of printed circuit boards
Authors: Ong C.‐J. , Tsang L. 
Published: November 2007

AbstractOriginally published Microwave Opt Technol Lett 49 (2007), 225–231. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 263, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23005
Temperature and strain sensor based on weak LPG and fiber ring down
Authors: Bo Liu , Jianhua Luo , Guiyun Kai 
Published: November 2007

AbstractA fiber ring down with a weak long period grating (WLPG) for temperature and strain sensing is proposed and demonstrated. The sensing devices consist of two matched fiber Bragg gratings, a section of single mode fiber, a WLPG, a pulsed laser source, and a photodiode. The LPG incorporated in fiber ring cavity is used as sensing element, the induced resonance wavelength shift of which will cause an additional loss in the cavity. As a result, the amplitude of applied temperature variation or strain can be obtained by simply measuring the fiber ring down time. The proposed sensing system has advantages of easy configuration and rapid response. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 111–114, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23006
Analysis of waveguide slot antennas using MLFMA
Authors: Liu Xu , Liang Changhong , Zhao Xunwang 
Published: November 2007

AbstractSlotted waveguide array is analyzed using the multilevel fast multipole algorithm (MLFMA) combined with the near‐field preconditioner applied to the metallic surfaces of the waveguide structure. The approach differs from existing methods that utilize asymptotic method, method of moments (MoM) with the magnetic field integral equation (MFIE), or hybrid methods of MoM and boundary element method (BEM). Since no ideal assumptions are made, the analysis and computation are considered to be theoretically and numerically rigorous. In addition, the low complexity of the MLFMA is especially favorable for fast calculation of the large‐scale waveguide arrays. The experimental results validate the algorithm. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 65–68, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23015
Improved formulas for the resonant frequencies of dual frequency arrow shaped compact microstrip antenna
Authors: Akdagli Ali , Ozdemir Caner , Yamacli Serhan , Arcasoy C. Cengiz 
Published: November 2007

AbstractIn this article, simple expressions for calculating the resonant frequencies at TM10 and TM01 modes of dual frequency arrow‐shaped compact microstrip antennas are presented. These empirical expressions are derived with the use of differential evolution algorithm by using the simulation data reported in the literature. The resonant frequency results achieved in this study are compared with the simulation results and theoretical results of the design formulas proposed elsewhere. It is shown that our formulas provide more accurate results with respect to the theoretical analyses previously published in the literature. The new formulas also give a simpler way to calculate the resonant frequencies of arrow‐shaped compact patch antenna with dual frequency. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 62–65, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23020
High‐sensitivity pressure sensor using a polymer‐embedded FBG
Authors: Ahmad H. , Harun S. W. , Chong W. Y. , Zulkifli M. Z. , Thant M. M. M. , Yusof Z. , Poopalan P. 
Published: November 2007

AbstractA new pressure sensor based on fiber Bragg gratings (FBG), is described with high‐pressure sensitivity. The sensor is configured by embedding the FBG in a polymer‐field aluminum casing with an opening on one side, which is exposed to pressure measurand. The measured pressure response is 0.06 nm/psi that is ∼2700 times higher than the pressure response measured with a bare FBG. The linearity of the designed sensor is also shown to be good at pressures below 50 psi. This sensor has numerous potential applications in the area of low‐pressure measurements. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 60–61, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23021
Boro arrays–broadside antenna arrays with passive elements
Authors: Reljić Boro M. 
Published: November 2007

AbstractA new class of broadside antenna arrays with passive elements—Boro arrays is reviewed. The array is other boundary case of passive arrays, while the first is Yagi‐Uda array which is an endfire array. Main area of the array applications is high efficiency, high gain, and planar antenna systems. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 184–188, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23023
Experimental implementation of B92 quantum key distribution protocol
Authors: Mendonça F. A. , de Brito D. B. , Silva J. B. R. , Thé G. A. P. , Ramos R. V. 
Published: November 2007

AbstractQuantum key distribution is a technique that permits the secure distribution of a bit string that is used as key in cryptographic protocols. The security is guaranteed by suitable coding of the information in a quantum property and from the fact that a quantum cannot be both split and cloned. In this article, we give details and show the results of an experimental realization of the B92 quantum key distribution protocol in 1550‐nm telecom window. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 236–241, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23025