bluuebunny/crossref_metadata_2025_split huggingface dataset:
Novel continuous spectrum generation system using a nano‐waveguide for white light, short and sub‐millimeter waves use
Authors: Mitatha S. , Yupapin P. P. 
Published: July 2009

AbstractWe propose a novel system of a nano‐waveguide that can be used to generate the continuous spectrum, that is, white light. The simultaneous generation of short and sub‐millimeter waves can also be generated by using either dark or bright soliton schemes. A system consists of two microring and a nanoring resonators that can be integrated into a single system. The large bandwidth is generated by a soliton pulse within a Kerr type nonlinear medium where the continuous bandwidth or wavelength can be performed. Results of the bright soliton obtained have shown the potential of using the technique for white light source generation and detection, which is discussed. The simultaneous generation of short and millimeter waves using dark soliton is also proposed. The advantage is that the large bandwidth separation of the short and sub‐millimeter waves can be obtained, which is allowed the simultaneous generation of short and millimeter waves. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2258–2262, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24618
Small electrical antenna for SAW sensor biotelemetry
Authors: Collin Gwladys , Chami Ali , Luxey Cyril , Le Thuc Philippe , Staraj Robert 
Published: July 2009

AbstractA spiral antenna matched to a SAW sensor for blood pressure and body temperature monitoring is proposed. As the antenna/SAW device is dedicated to be implanted in a human body, a small antenna with omnidirectional pattern is required. The proposed structure has a total area of 4 × 2.5 mm2and a 1.1 mm height. To take into account the human body effect, we use a homogenous phantom with a dielectric permittivity of 52 and a conductivity of 1.74 S/m. The −10 dB impedance bandwidth of the proposed antenna is 66% from 2.22 to 3.83 GHz; moreover, a quasi‐isotropic radiation pattern is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2286–2293, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24622
A novel wideband bandstop filter
Authors: Li Jiu‐sheng 
Published: July 2009

AbstractA novel bandstop filter using star shape structure is designed, fabricated, and measured. Parameters are optimized via numerical simulations. Measurements are carried out using network analyzer. The proposed filter has wide bandwidth, compact dimensions, easy fabrication, and low cost. The simulated and measured results show that the 3 dB bandwidth of the bandstop filter is from 2.2 to 5.0 GHz the least insertion loss of 0.1 dB, and the largest stop‐band attenuation is of −45 dB. There is a good agreement between the simulated and experimental results. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2464–2466, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24624
Equivalent circuit of complementary split‐ring resonator loaded transmission line
Authors: Hu Xin , Zhang Qiaoli , Lin Zhili , He Sailing 
Published: July 2009

AbstractIn this article, a circuit model is proposed for the complementary split‐ring resonators (CSRRs) loaded transmission line, and comparisons between the results derived from the equivalent circuit model and the experimental results are given and a good agreement between them over a wide frequency band supports the effectiveness of the proposed modeling methodology. Both the results show the negative permittivity at the vicinity of the resonance frequency of CSRR. By comparing the results of different periodic length (i.e., the capacitance per‐unit‐cell of the host microstrip line is changed), the validity of the equivalent circuit is further confirmed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2432–2434, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24625
A high‐performance 94 GHz planar Quasi‐Yagi antenna on GaAs substrate
Authors: Truong Le Huu , Baek Yong‐Hyun , Lee Mun‐Kyo , Park Sun‐Woo , Lee Sang‐Jin , Rhee Jin‐Koo 
Published: July 2009

AbstractA high‐performance 94 GHz planar Quasi‐Yagi antenna on a GaAs substrate is presented. The antenna is fabricated on a 100 μm GaAs wafer and has dimension of 1.6 × 2.6 mm2. Experimental results show that this antenna covers a wide bandwidth from 91 GHz to 106 GHz, with the return loss of better than −10 dB. An end‐fire radiation pattern is formed, a peak gain of 7.1 dBi, and front‐to‐back ratio of 15 dB at 94 GHz are also achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2396–2400, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24628
A CPW‐FED circularly polarized antenna for lower ultra‐wideband applications
Authors: Shen Yizhu , Law Choi L. , Shen Zhongxiang 
Published: July 2009

AbstractA novel design of circularly polarized square slot antenna fed by a coplanar waveguide for lower ultra‐wideband (UWB) application is presented. Circular polarization is achieved by protruding a truncated corner and a grounded inverted‐L strip at two opposite corners, respectively. The antenna is investigated both in the frequency and time domains. The results show that its measured 10‐dB return loss bandwidth is from 2.7–5.0 GHz and 3‐dB axial ratio bandwidth varies from 3.5 to 4.8 GHz, whereas the size is just 35 mm × 35 mm. The proposed antenna is suitable for lower UWB system (3.4–4.8 GHz) applications in Singapore. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2365–2369, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24629
A fully integrated ultra‐low power CMOS transmitter module for UWB systems
Authors: Yuan Tao , Zheng Yuanjin , Li Le‐Wei , Leong Mook‐Seng 
Published: July 2009

AbstractA fully integrated CMOS ultra‐wideband (UWB) transmitter module is proposed for UWB applications. The transmitter module consists of a band‐notched UWB antenna and a transmitter IC which integrates a pulse generator, a gating signal generator and driver amplifiers (DAs). The drive amplifier uses a two‐stage amplifier—a Class‐E amplifier and a Class‐A amplifier with switch control, to significantly reduce power consumption (522 μW/20 Mbps). Fabricated using a 0.18‐μm CMOS process, the generated pulse then passes through the DA, which not only drives the antenna but also shapes the generated digital signal to meet the Federal Communications Commission spectral mask specification. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2318–2323, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24632
A novel printed monopole antenna for GSM/DCS/PCS/UMTS band operation
Authors: Chen Wen‐Shan , Din Si‐Han 
Published: July 2009

AbstractThis article proposed a design of a monopole antenna with a bent loop slit for GSM900/DCS1800/PCS1900/UMTS applications. The proposed antenna was designed on FR4 substrate and fed by 50 Ω microstrip line. The proposed antenna was first designed a rectangle planar patch to operate at a higher frequency of 1.8 GHz for DCS1800/PCS1900/UMTS applications. Besides, the other operation band of 900 MHz for GSM900 applications has been achieved by inserting a bended slit loop into the rectangle planar patch. Simulated and measured results are shown later. Details of the proposed antenna configuration and experimental results are also discussed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2453–2458, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24638
Center‐fed circular Epsilon‐negative zeroth‐order resonator antenna
Authors: Tang Hangfei , Zhao Xiaopeng 
Published: July 2009

AbstractA center‐fed circular ε‐negative zeroth‐order resonator antenna with a symmetrical omnidirectional radiation pattern is investigated numerically and experimentally in this article. The radiation pattern of the proposed antenna is symmetrical. Furthermore, symmetry of radiation pattern, bandwidth and gain could be improved by adding unit‐cells and adjusting unit‐cell parameters. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2423–2428, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24639
A tunable bandpass filter based on varactor loaded split‐ring resonators
Authors: Genc Alper , Baktur Reyhan 
Published: July 2009

AbstractThis article presents an electronically tunable varactor‐loaded microstrip bandpass filter based on the planar split ring resonators (SRRs). The varactor is a reverse‐biased semiconductor diode, and is connected between the concentric rings of the SRR. An individual varactor loaded SRR based bandpass tunable filter module is analyzed. Then a third order tunable filter with 2% fractional bandwidth and a tuning range from 2.11 to 2.34 GHz is assembled from basic filter modules. A prototype filter is designed, fabricated and tested. The maximum tuning range of the prototype filter is 10.2% and the size of the filter is reduced by a factor of 3.5 compared to a coupled line filter. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2394–2396, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24641
Permittivity range profile reconstruction of multilayered structures from microwave backscattering data by using particle swarm optimization
Authors: Genovesi Simone , Salerno Emanuele , Monorchio Agostino , Manara Giuliano 
Published: July 2009

AbstractA method for the investigation of multilayered structures by using microwave probes is proposed. An iterative optimization procedure reconstructs the permittivity range profiles of such structures from backscattering data by optimizing a functional consisting of a term depending on the data and a regularization term. A linear process is also accounted for the global smoothness enforced by classical regularization. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2390–2394, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24642
Coupled microstrip line bandpass filter with harmonic suppression using right‐angle triangle grooves
Authors: Mohra Ashraf S. 
Published: July 2009

AbstractA single grooved coupled line bandpass filter with improved pass band response and first harmonic suppression is described. The suppression of the first spurious harmonic was done by using right‐angle triangle grooves in the middle of each of the coupled‐microstrip lines that construct the bandpass filter. As the number of grooves increase as the shift in the operating frequencies increase also, so it is suitable to use less numbers of grooves as possible. A three stage bandpass filter using coupled‐microstrip lines was designed, simulated, and realized to illustrate this idea. The simulated results illustrate a good performance for right‐angle triangle groove over the corresponding rectangular groove. The measured S‐parameters measurement of the realized bandpass filter shows the suppression of the second resonance frequency and less shift in the center frequency. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2313–2318, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24644
UWB binomial curved monopole with binomial curved ground plane
Authors: Habib Mohamed A. , Nedil Mourad , Djaiz Azzeddine , Denidni Tayeb A. 
Published: July 2009

AbstractThe design of a new ultra‐wideband (UWB) coplanar waveguide antenna is presented. The proposed antenna is a printed‐circuit monopole using coplanar technology. The radiating element is a modified monopole with an optimal shape based on a binomial function. The ground plane is also designed with the same law. Different orders of this binomial function are considered. The antenna shape and dimensions are optimized to achieve an UWB bandwidth operation covering the frequency range from 3.1 to 10.6 GHz. A prototype of the designed antenna was fabricated and measured. Obtained results show that the proposed antenna provides omnidirectional elevation pattern across the operating band. Results provided by simulations and measurements are presented and discussed; they show a good agreement. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2308–2313, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24645
Interdigital filter design
Authors: Du Plessis Warren P. 
Published: July 2009

AbstractA new synthesis procedure for interdigital filters with shorted‐pin feeds is developed by relating the coupling factors and external Qs to the physical structure of the filter. This new procedure is easily understood and applied, extremely flexible, and allows design tradeoffs to be evaluated in an intuitive way. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2269–2272, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24647
A novel triple band printed antenna for WLAN/WiMAX applications
Authors: Thomas K. George , Sreenivasan M. 
Published: July 2009

AbstractA new microstrip‐fed triple band antenna is presented for satisfying wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications simultaneously. The antenna comprises a rectangular monopole fed by a microstrip transmission line to generate WLAN and WiMAX frequency bands and a circular disc monopole to resonate in 3.5 GHz WiMAX frequency band. A simple formula for calculating the resonant frequency is given. The antenna is simple in configuration outlining an overall dimension of 44 × 20 × 0.76 mm3. The measured 10 dB bandwidth for return loss is from 2.37 to 2.7, 3.23 to 3.70, and 4.29 to 6.58 GHz for WiMAX and WLAN applications. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2481–2485, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24650
An adaptive finite element method for second‐order plate theory
Authors: Hansbo Peter , Heintz David , Larson Mats G. 
Published: July 2009

AbstractWe present a discontinuous finite element method for the Kirchhoff plate model with membrane stresses. The method is based on P2‐approximations on simplices for the out‐of‐plane deformations, using C0‐continuous approximations. We derive a posteriori error estimates for linear functionals of the error and give some numerical examples. Copyright © 2009 John Wiley & Sons, Ltd.
Zooarchaeology at the Niah Caves, Sarawak: context and research issues
Authors: Barker G. , Piper P. J. , Rabett R. J. 
Published: July 2009

AbstractExtensive archaeological excavations in the Niah Caves (Sarawak, Malaysian Borneo) over the past 50 years have produced perhaps 750 000 fragments of vertebrate bone, one of the largest faunal assemblages in the region. This paper introduces a series of research studies examining different aspects of the Niah fauna, and discusses how they are contributing to, and shaping, regional research agendas relating to prehistoric environments and societies in Island Southeast Asia. Zooarchaeology has traditionally had a rather ‘Cinderella’ status here, but the ongoing programme of study of the Niah Caves fauna is demonstrating the remarkable potential of this material to address questions of Pleistocene and Holocene climate and environment, biodiversity, human activities within caves, people's engagement with the landscapes they inhabited as foragers and farmers, and the nature of the transition from foraging to farming. Copyright © 2009 John Wiley & Sons, Ltd.
Tracking the hypersensitive dimension in narcissism: Reliability and validity of the Hypersensitive Narcissism Scale
Authors: Fossati Andrea , Borroni Serena , Grazioli Federica , Dornetti Lorenzo , Marcassoli Irene , Maffei Cesare , Cheek Jonathan 
Published: July 2009

AbstractThe aim of the study was to assess the reliability and the validity of the Italian translation of the Hypersensitive Narcissism Scale (HSNS) in a sample of consecutively admitted psychiatric outpatients (N= 366) and in an independent sample of non‐clinical volunteers (N= 385). In both samples, data from the HSNS had adequate internal consistency, considering its limited length. Consistent with our hypothesis, a two‐factor structure explained the HSNS item intercorrelations. Among clinical participants, the HSNS and the Narcissistic Personality Inventory (NPI) showed radically different patterns of correlations with the fourth edition of the Diagnostic and Statistical Manual for Mental Disorders (DSM‐IV) Personality Disorder diagnoses. In both samples, the HSNS and the NPI showed distinct and theoretically consistent correlations with temperament and character dimensions. As a whole, these findings seem to support the reliability and the validity of the HSNS as a measure of hypersensitive narcissism. Copyright © 2009 John Wiley & Sons, Ltd.
Physical and Mechanical Properties of CrAlN and CrSiN Ternary Systems for Wood Machining Applications
Authors: Benlatreche Yacine , Nouveau Corinne , Aknouche Hamid , Imhoff Luc , Martin Nicolas , Gavoille Joseph , Rousselot Christophe , Rauch Jean‐Yves , Pilloud David 
Published: July 2009

AbstractNowadays, almost all the cutting tools in metal machining are protected with a surface treatment. Nevertheless, this is not the case in wood machining where no tools are protected, except by thermal treatments, and so they present a previous wear because of the use of steel or carbide materials in milling, sawing, routing, etc. During these processes, the tools are particularly exposed to abrasive and shock wear. To enhance their wear resistance, one solution is to protect them with hard coatings. The present study deals with the development of ternary systems (CrAlN and CrSiN) obtained by two PVD different magnetron sputtering systems [‘A’ (laboratory where CrAlN layers have been obtained) and ‘B’ (laboratory where CrSiN layers have been obtained) in the following text] on carbide WC–Co tools used in second transformation of wood to be compared to the binary CrN one. CrAlN and CrSiN films were deposited with different Al and Si contents, respectively, in order to check the effect of the additive element (Al or Si) on the different properties of the Cr–N system. The different coatings were characterized by SEM and EDS for thickness measurements, morphology and composition analyses, respectively, by nanoindentation for hardness and Young's modulus measurements and by pin‐on‐disc to determine their friction coefficient. Routing of medium density fibreboard (MDF) was realized employing untreated or modified carbide WC–Co tools in order to compare their wear resistance. We observed that the Al and the Si addition improved the hardness and the Young's modulus of the Cr–N system (‘A’: 29 and 410 GPa, respectively, ‘B’: 18 and 280 GPa, respectively). Indeed, the hardness values are 15–36 GPa for CrAlN and 15–24 GPa for CrSiN coatings. Besides, the Young's modulus values are 331–520 GPa for CrAlN and 260–320 GPa for CrSiN coatings. The friction coefficient of the CrAlN layers varied between 0.6 and 0.7 and it increased slightly with the Al content. For the CrSiN coatings, the friction coefficient was lower and about 0.4. In both cases, the CrN layers ‘A’ and ‘B’ presented similar friction coefficient than CrAlN and CrSiN, respectively. During the routing of MDF, the CrN ‘A’ coating has a similar wear behaviour than the optimized CrAlN one (5 at.% of Al) while the optimized CrSiN coating (1.2 at.% of Si) showed a better behaviour against wear than the CrN ‘B’ one. The wear resistance of CrAlN‐ and CrSiN‐coated carbide tools decreased when the Al and Si contents increased.
Counterurbanisation and rural gentrification: an exploration of the terms
Authors: Phillips Martin 
Published: July 2009

AbstractThis paper examines the interrelationships between the concepts of counterurbanisation and rural gentrification, suggesting that four different positions can be identified. Firstly, these concepts are highly commensurable and could usefully be more closely aligned. Secondly, rural gentrification has a political/critical dimension that is missing from conceptualisations of counterurbanisation, and hence rural gentrification might usefully displace counterurbanisation as a focus of study. Thirdly, counterurbanisation is a less reductionist concept than rural gentrification, and therefore counterurbanisation researchers need to disentangle themselves from too great a focus on rural gentrification. Fourthly, both concepts share many problematic features and may both be viewed as chaotic concepts. The paper then discusses how counterurbanisation and gentrification researchers have responded to criticisms relating to their conceptual foci, suggesting that these can be characterised as legislative or interpretive. It is argued that whilst the former response has been predominant, there are signs that the latter approach is also being adopted. The concluding part of the paper draws on the notion of an interpretive approach to understanding counterurbanisation and rural gentrification, and their interrelationships. Use is made of Latour's notion of ‘circulatory sociologies of translation’ to consider how the two concepts are linked not only to their objects of study but also to social relationships with other academics, with governmental organisations and with public opinion and values. Attention is drawn to the differential relationships that counterurbanisation and rural gentrification are implicated in, and how this might account for the differential character of the two concepts. Copyright © 2009 John Wiley & Sons, Ltd.
The relation between magnetization and internal energy for ferromagnets Fe, Ni, and electron‐doped In2O3:Cr, antiferromagnetically ordered Zn Cu3(OH)6 Cl2, and the layered material κ‐(BEDT‐TTF)2 Cu[N(CN)2]Cl
Authors: March N. H. 
Published: July 2009

AbstractGrout and March utilized the exact solution of the two‐dimensional Ising model to relate the internal energy E(T) to the magnetization M(T). These authors then used Bloch spin‐wave theory to relate E and M at low temperatures for both insulating and metallic ferromagnets in three dimensions.Ayuela and March, very recently, have used experimental data on the specific heat and the magnetization to show that for metallic Fe and Ni the E – M data collapse on to a single curve. A model with long‐range exchange interactions is presented to allow insight to be gained into this feature. Reference is also made briefly to the ferromagnetism of the electron‐doped In2 O3:Cr system.Two antiferromagnetically ordered materials are next considered, though now more qualitatively than for the ferromagnets. The first is the spin −1/2 kagome antiferromagnet ZnCu3(OH)6 Cl2, and the second is the κ‐phase layered material (BEDT‐TTF)2 Cu[N(CN)2]Cl. Anomalous low‐temperature specific heat Cv (T) is emphasized, with an enhancement that is reduced by application of a magnetic field. Further work is proposed, both experiment and theory, to understand the precise nature of the low‐lying magnetic excitations in the latter κ‐phase material. © 2009 Wiley Periodicals, Inc. Int J Quantum Chem, 2009