bluuebunny/crossref_metadata_2025_split huggingface dataset:
New and accurate synthesis formulas for multilayer homogeneous coupling structure
Authors: Guney Kerim , Yildiz Celal , Kaya Sabri , Turkmen Mustafa 
Published: July 2007

AbstractNew, accurate closed‐form formulas for the synthesis of multilayer homogeneous coupling structure (MHCS) are presented. They are obtained by using a differential evolution algorithm (DEA), and are useful for the computer‐aided design (CAD) of MHCS. The average percentage error is found to be 0.38% for 1825 MHCS samples having different electrical parameters and physical dimensions, as compared with the results of the quasi‐static analysis. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2486–2489, 2007; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.22743
Hybrid shaped ultra‐wideband antenna
Authors: Pei Qing‐Qi , Qiu Cheng‐Wei , Yuan Tao , Zouhdi Saïd 
Published: July 2007

AbstractA novel planar ultra‐wideband antenna with hybrid shapes of the patch and the ground is presented. Simulation and measurement have been performed. A much wider impedance bandwidth has been achieved by the hybrid design for potential application in future UWB. The measured radiation patterns show good omnidirectional performance across the operation bandwidth. The modulation and distortion of the transmitted pulse are also shown. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2412–2415, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22746
Experimental study on all optical coding and decoding of short pulses at 40‐Gbit/s
Authors: Chen Xiaogang , Huang Dexiu , Yuan Xiuhua , Xia Ge 
Published: July 2007

AbstractA 7‐chip, 280‐Gchip/s quaternary phase‐shift code is assigned to short pulses after reflection from an encoder, the code is then recognized by a decoder. The encoder and decoder, consisting of superstructured fiber Bragg gratings (SSFBGs), are fabricated using the equivalent‐phase‐shift method; only ordinary phase masks and submicrometer precision in control are required. The quaternary phase encoding and decoding of short pulses at 40‐Gbit/s is experimentally demonstrated, and it is required in optical code division multiplexing (OCDM) systems and packet‐switched networks. Interchannel interference noise is also considered and evaluated; a nonlinear optical loop mirror (NOLM) within the receiver is introduced to suppress the interference noise as well as additive noise. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2409–2412, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22747
Dual band‐notched ultra‐wideband monopole antenna with an annular CPW‐feeding structure
Authors: Luo Ching‐Hsing , Lee Chien‐Ming , Chen Wen‐Shan , Tu Chih‐Ho , Juang Ying‐Zong 
Published: July 2007

AbstractA dual band‐notched monopole antenna with an annular coplanar waveguides feeding structure for ultra‐wideband (UWB) application is proposed, in which the ring in the feeding structure is used to increase the impedance bandwidth, and two quarter‐wavelength tuning stubs inserted into the proposed feeding ring and radiating ring, respectively, creates two band‐notches at 5.15 and 5.75 GHz across the UWB frequency band from 2.6 to 12 GHz. The novel design is quiet compact and suitable for creating UWB antenna with dual narrow frequency notches. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2376–2379, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22748
Methods to excite circularly polarized waves for a quad‐unit
Authors: Chang The Nan 
Published: July 2007

AbstractIn this article, techniques to generate circularly polarized waves for a quad‐unit are investigated. The quad‐unit is offset‐fed by an open rectangular ring. It has been shown that both 3‐dB axial ratio and 10‐dB return loss bandwidths can be achieved up to 11%. With a large ring, we have a stable maximum beam at the bore‐sight direction. In experiments, it can provide a gain of 7 dBic at 5.5 GHz. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2372–2375, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22749
Tapered slotline antenna modification for radiation pattern improving
Authors: García E. , De Lera E. , Rajo E. 
Published: July 2007

AbstractA novel structure of tapered slotline antenna is presented. Using “palm tree” shaped metallization cross‐polarization levels are improved. Also their influence on radiation pattern is considered. Matching performance is at least as good as a simple exponential tapered slotline (Vivaldi) antenna. Frequency coverage for return loss < −10 dB exceeded 5.5:1 (2.9–15 GHz) and measured gain reached values higher than 6 dB from 5 to 15 GHz. Radiation pattern is stable from 6 GHz to 12 GHz and cross‐polarization is below −20 dB for the 3–11 GHz band in the main direction. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2590–2595, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22756
Compact highpass filter using complementary split ring resonator
Authors: Mondal Priyanka , Chakrabarty Ajay 
Published: July 2007

AbstractIn this letter complementary split ring resonator is proposed to design compact highpass filter. Highpass filtering is obtained by overlapping a left‐hand and a right‐hand (RH) transmission band. A fabricated prototype filter having cut‐off frequency (fc) of 1.8 GHz shows a maximum passband insertion loss less than 1.3 dB up to 3fc. Implementing area of the filter is smaller than 0.08 λg × 0.09 λg, λg being the guided wavelength at fc. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2470–2472, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22763
RETRACTED: Novel method for skirt response improvement of open‐stub low‐pass filter
Authors: Tseng Jan‐Dong , Liu Wei‐Ting 
Published: July 2007

AbstractA direct circuit replacement method using interdigital low‐pass structure directly replaced all open stubs of odd‐order open‐stub low‐pass filter to achieve sharp skirt response. The characteristics of the interdigital structure are analyzed by lumped element equivalent circuits and investigated by full‐wave electromagnetic simulator, IE3D. These simulated results were then applied as a guideline for the replacement. Two open‐stub low‐pass filters were designed by this method to enhance the skirt response near 3‐dB cutoff frequency. The measured results show very good improvement on skirt response and the rejection level in stop band. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2434–2438, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22764
The calculation of dielectric dispersive models in THz range with GA
Authors: Zhu Wanhua , Li Chao , Zhang Guoqing , Fang Guangyou 
Published: July 2007

AbstractIn this article, the dielectric dispersive models in Terahertz range are determined with the classical dielectric theory and genetic algorithm (GA). Four samples' models, glass, plywood, spruce‐pine‐fir (SPE) wood and drywall, are established. And the models have been proved to have a good agreement with the experimental results measured by terahertz technology and terahertz time domain spectroscopy and other equipments. It is concluded that the determined models are effective in this frequency range, and GA is an effective tool for calculating the models' parameters. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2540–2545, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22776
Iterative implementation of approximate solutions for electromagnetic scattering
Authors: Nakhkash Mansor 
Published: July 2007

AbstractThis article introduces a recursive formula, in which any approximate method can, iteratively, be incorporated to solve electromagnetic scattering problems. The use of extended Born approximation and quasi‐analytical approximation in this formula results in two series (algorithms), whose convergence properties are discussed. Numerical examples are given to demonstrate merits and the range of applicability of the new series. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2425–2429, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22781
A high gain, low noise WLAN receiver for dual if double downconversion application in 90‐nm RF CMOS
Authors: Chang Chieh‐Pin , Hou Jian‐An , Su Jionguang , Chen Ja‐Hao , Chen Chih‐Wei , Liou Tsyr‐Shyang , Wong Shyh‐Chyi , Wang Yeong‐Her 
Published: July 2007

AbstractA high power gain, low noise WLAN receiver, using a 158 GHz fT 90‐nm RF CMOS technology for dual IF double downconversion system‐in‐package application is demonstrated. The proposed circuit could improve the design flexibility of back‐end stages due to its high power gain and low noise performances. The LNA and Mixer are biased at 1 V with 12.9 mA and 1.8 V with 5.5 mA, respectively. The proposed circuit delivers the double‐sideband noise figure of 2.68 dB, conversion gain of 36.24 dB, IIP3 of −25 dBm, IIP2 of 21.1 dBm, and LO‐IF isolation of −56.2 dB under the 1 dBm LO power, while maintaining the RF port and IF port return losses below −12.9 and −18.7 dB, respectively. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2422–2425, 2007; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.22782
Simple analysis of printed annular slot antennas
Authors: Kucharski Andrzej A. , Borowiec Robert 
Published: July 2007

AbstractThe paper describes a simple procedure enabling analysis of annular slot antennas backed by a dielectric layer. The formulation assumes thin slot approximation, which, together with typical body‐of‐revolution scheme, allows to formulate the integral equations for modal magnetic current coefficients. Integrals of Green's functions appearing in the formulation are computed using mixed spatial/spectral method. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2350–2354, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22785
Design of the novel DVB‐H antenna for mobile handheld terminal
Authors: Lee Jung N. , Park Jong K. , Yim Byoung J. 
Published: July 2007

AbstractWe have proposed a novel digital video broadcast for handheld (DVB‐H) antenna for mobile handheld terminal using a U‐shaped radiator and a simple matching circuit. The matching circuit consists of two chip capacitors and one chip inductor, and is used for achieving an improved impedance matching over the DVB‐H frequency band of 470–702 MHz. The proposed antenna was designed, fabricated, and measured. The proposed antenna covers the entire DVB‐H band for VSWR < 2.5. The simulated antenna gain varies from 2.1 to 2.8 dBi over the operating frequency range. The obtained radiation patterns are very close to those of a conventional dipole antenna. Details of the proposed antenna design and the simulated and measured results are presented and discussed. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2345–2350, 2007; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.22786
Internal printed loop‐type mobile phone antenna for penta‐band operation
Authors: Li Wei‐Yu , Wong Kin‐Lu 
Published: July 2007

AbstractAn internal printed loop‐type antenna comprising a driven monopole and a coupled strip for application in GSM850/GSM900/DCS/PCS/UMTS penta‐band operation is presented. The antenna is suitable to be printed on the system circuit board of the mobile phone and short‐circuited to the system ground plane to form as a loop‐type structure. The antenna provides two wide bands at about 900 and 1900 MHz to cover the GSM850/900 and DCS/PCS/UMTS bands, respectively. The lower band is generated by the driven monopole and coupled strip operated together as a half‐wavelength loop resonant structure. The upper band is formed by two resonant modes: the first one is the driven monopole operated alone as a quarter‐wavelength monopole and the second one is contributed from the driven monopole and coupled strip operated together as a one‐wavelength loop resonant structure. Details of the proposed antenna are presented and discussed. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2595–2599, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22791
A novel reconfigurable microstrip antenna and its performance analysis in diversity reception system
Authors: Wu Yujiang , Nie Zaiping 
Published: July 2007

AbstractA novel reconfigurable microstrip antenna with the capability of switching among four polarization senses is described. An analysis framework for assessing the performance of antenna selection diversity reception system with the proposed reconfigurable antenna is also presented for the first time. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2516–2519, 2007; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.22795
Miniaturized microstrip meander‐line antenna with very high‐permittivity substrate for sensor applications
Authors: Liu Haiwen , Ishikawa Shohei , An An , Kurachi Satoshi , Yoshimasu Toshihiko 
Published: July 2007

AbstractThis article presents a compact microstrip meander‐line antenna for sensor network applications in the 290 MHz band. The antenna is fed by coplanar waveguide and its dimension is 15 mm × 15 mm × 2 mm. Because of the use of a very high relative permittivity substrate (εr = 90) and meander‐line structure simultaneously, the side length of the designed antenna is about λg/12 (λg is the guided wavelength) so that the circuit size is reduced greatly. Measurements verify that the proposed antenna has bandwidth of 12% at the resonant frequency of 293 MHz. Also, the radiation patterns measured at resonance frequencies are very close to omnidirectional in the E‐plane. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2438–2440, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22798
Sharp cut‐off, miniaturized metamaterial binomial microstrip low‐pass filter
Authors: Abid Ali , Zhirun Hu 
Published: July 2007

AbstractA binomial low‐pass filter provides the flattest passband response but, slow attenuation transition. This letter presents a design for improving the roll‐off performance and reducing the size of the filter based on the negative‐ε property of complementary split ring resonators (CSRRs), whilst maintaining the filter passband performance. The measured results indicate that the proposed structure achieves a flat pass‐band with no ripples. Whilst also having a selectivity of 32 dB/GHz, which significantly exceeds the 17 dB/GHz selectivity of the conventional design. Furthermore, the proposed filter has reduced the filter size by 16%. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2406–2409, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22799
Knee extensor fatigability after bedrest for 8 weeks with and without countermeasure
Authors: Mulder Edwin R. , Kuebler Wolfgang M. , Gerrits Karin H. L. , Rittweger Joern , Felsenberg Dieter , Stegeman Dick F. , De Haan Arnold 
Published: July 2007

AbstractWe analyzed the effects of gravitational unloading on muscular fatigability and the effectiveness of resistive vibration exercise to counteract these changes. Changes in knee extensor fatigability as a consequence of 8 weeks of horizontal bedrest with or without daily resistive vibration exercise were evaluated in 17 healthy male volunteers. Bedrest increased fatigability (% decrease in maximal voluntary isometric torque per minute exercise) from −7.2 ± 0.5 to −10.2 ± 1.0%/min (P < 0.05), which was accompanied by a decline (of 52.0 ± 3.7%, P < 0.05) in muscle blood flow. Daily resistive vibration exercise training during bedrest prevented increases in fatigability (from −10.8 ± 1.8 to −8.4 ± 1.6%/min, P < 0.05), and mitigated the reduction in blood flow (decline of 26.1 ± 5.1%, P < 0.05). Daily resistive exercise may thus be suggested as an effective countermeasure during spaceflight and illness‐related prolonged bedrest to combat the detrimental changes in muscle endurance that result from gravitational unloading. Muscle Nerve, 2007
Anthropological and physicochemical investigation of the burnt remains of Tomb IX in the ‘Sa Figu’ hypogeal necropolis (Sassari, Italy) – Early Bronze Age
Authors: Piga G. , Malgosa A. , Mazzarello V. , Bandiera P. , Melis P. , Enzo S. 
Published: July 2007

AbstractExcavations carried out in Tomb IX of the hypogeic necropolis of ‘Sa Figu’, near the village of Ittiri (Sassari, Italy), supplied burnt human bone remains and pottery unambiguously referred to the Early Bronze Age (characterised by the local culture of ‘Bonnannaro’). Besides the anthropological study, we have investigated and evaluated the possibility of a funerary cremation practice in Sardinian pre‐history, a subject that has previously not been considered from a scientific point of view. Making use of a calibration procedure based on X‐ray diffraction (XRD) line‐broadening analysis, related to the microstructural properties, it was possible to estimate the combustion temperature to which the fragmented bones were subjected. It was found that the studied bones reached temperatures varying from 400°C up to a maximum of 850°C. This spread of values suggested inhomogeneous combustion of the bones, which seems compatible with funerary cremation practices. Copyright © 2007 John Wiley & Sons, Ltd.
The selling of the President 2004: a marketing perspective
Authors: O'Shaughnessy Nicholas J. , Henneberg Stephan C. 
Published: July 2007

AbstractGeorge W. Bush won the 2004 US Presidential election despite the facts of one thousand people losing their life in the Iraq war, the highest rate of increase in unemployment in 70 years and a vitriolic propaganda campaign (Michael Moore, etc.) against him. This case study seeks to explain the success through the prism of marketing theory and conceptual structures, that is, that the Bush team had a superior communications strategy and, within those parameters, superior marketing elements. Thus we seek to surface and integrate a number of causal explanations for his victory that arose from a political marketing orientation, specifically the offer of a ‘coherent narrative’; the conduct of a ‘permanent campaign’; more effective negative advertising (especially by pro‐Bush 527 groups), targeting and packaging; the success of the late campaign ‘big tent’ ploy. None of this however seeks to exclude the more purely political explanations for his success (located in such phenomena as the mobilization of the ‘Christian Right’ and the continuity to the aura attached to the ‘911 President’); nor is the application of marketing thought to political contexts treated uncritically.A further aim is to introduce political marketing modes of analysis to a political science audience—not to present them as a new ‘correctness’, for they are certainly vulnerable to challenge, but rather to precipitate more of an intellectual exchange between these two disciplines.Copyright © 2007 John Wiley & Sons, Ltd.
Evaluation of the SELDI‐TOF MS technique for protein profiling of pancreatic islets exposed to glucose and oleate
Authors: Ortsäter Henrik , Sundsten Tea , Lin Jian‐Man , Bergsten Peter 
Published: July 2007

AbstractThe aim of the study was to evaluate the SELDI‐TOF MS technique for pancreatic islet research. Mouse islets were cultured at low or high glucose levels in the absence or presence of oleate and characterized by measuring insulin secretion and oxygen tension. Subsequently, the islets were protein profiled. Up to 200 different peaks could be detected in a single experiment with the majority of peaks corresponding to proteins with masses below 30 kDa. By combining different protein arrays, the number of detected peaks could be increased further. The optimal binding of islet proteins was achieved using the anionic exchange array and phosphate buffer (pH 6) when the binding of insulin was low, which allowed other less abundant proteins to be captured. When islets from different culture conditions were profiled and analyzed, in total 25 proteins were found to be oleate/glucose‐regulated. An oleate‐regulated protein was chosen for identification work, which was conducted by passive elution from SDS‐PAGE gels and subsequent in‐gel trypsin digestion and MALDI‐TOF MS. The protein was identified as peptidyl‐prolyl isomerase B (PPI‐B). In conclusion, the study demonstrates that SELDI‐technique can be used not only to obtain islet protein patterns but is also helpful in the subsequent identification of differentially expressed proteins.
5‐Nitrogenated‐naphthopyrans: toward photoinduced hydrogen‐bonded complexes
Authors: Sallenave Xavier , Delbaere Stéphanie , Vermeersch Gaston , Pozzo Jean‐Luc 
Published: July 2007

AbstractA series of 3,3‐diphenyl‐3H‐naphtho[2,1‐b]pyrans substituted on 5‐position by various nitrogenated functional groups has been synthesized. The photochromic reaction between the pyranic closed form and their open forms has been studied using NMR and UV–Vis spectroscopies. The ability of the photoinduced carbonyl group to promote the formation of hydrogen‐bonded complexes has been compared within the series. Copyright © 2007 John Wiley & Sons, Ltd.
Stable silicon‐centered localized singlet 1,3‐diradicals XSi(GeY2)2SiX: theoretical predictions
Authors: Wang Yong , Ma Jing , Inagaki Satoshi 
Published: July 2007

AbstractSome localized singlet 1,3‐σ‐diradicals, XSi(GeY2)2SiX, (X = H, CH3, SiH3, C(CH3)3, NH2 for X = F; Y = H, CH3, OH, NH2, SiH3 for X = H) are theoretically designed by the orbital phase theory, the density functional theory (DFT) calculations , the second order Møller–Plesset perturbation theory (MP2), and the complete active space self‐consistent field (CASSCF) methods. The silicon‐centered singlet diradicals are more stable than the lowest triplets and than the bicylic σ‐bonded isomers if the isomers exist. The most stable singlet diradicals are not the π‐type diradicals, but the σ‐type diradicals where the radicals interact with each other through the SiGe bonds in the four‐membered rings. Copyright © 2007 John Wiley & Sons, Ltd.
Fabrication of nanoscale photochromic materials by vapor deposition method
Authors: Spangenberg Arnaud , Brosseau Arnaud , Metivier Rémi , Sliwa Michel , Nakatani Keitaro , Asahi Tsuyoshi , Uwada Takayuki 
Published: July 2007

AbstractVapor deposition method was used to obtain nanocrystals of N‐(3,5‐di‐tert‐butylsalicylidene)‐4‐ aminopyridine (1) and N‐(3,5‐di‐tert‐butylsalicylidene)‐4‐iodoaniline (2), and nanoscale thin layers (65 nm thick) of cis‐1,2‐dicyano‐1,2‐bis(2,4,5‐trimethyl‐3‐thienyl)ethene (3). Compound 3 was also deposited on a substrate previously covered by gold nanoparticles (Ø = 100 nm). Nanoscale crystals of 1 and 2 showed similarities with bulk crystals: they exhibit photochromic properties and they have similar shapes according to Atomic force microscopy (AFM) investigations. The thin layers of 3, with and without gold nanoparticles, showed light‐induced absorption change in the visible. Copyright © 2007 John Wiley & Sons, Ltd.