bluuebunny/crossref_metadata_2025_split huggingface dataset:
Displacement sensing with two asymmetrical inclined fibers
Authors: Yang H. Z. , Harun S. W. , Ahmad H. 
Published: March 2010

AbstractFiber optic displacement sensor (FODS) with two asymmetrical inclined fibers is demonstrated using an intensity modulation technique. Compared to the sensor with two symmetrical inclined fibers, the sensitivities of proposed FODS are improved by 64.7%, 40.8%, and 31.8% at inclination angles of 10°, 20°, and 30°, respectively. The analysis also shows that the increment of inclination angle increases the output sensitivity but reduces the linear range of the sensor. Compared to the case of parallel fibers, sensitivity can be improved by 3.6, 8.5, and 16 times for inclination angles of 10°, 20°, and 30° respectively. However, the corresponding linear ranges are decreased by 67%, 55%, and 33% for inclination angles of 10°, 20°, and 30°, respectively. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1271–1274, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25173
Full‐duplex OFDM‐ROF architecture based on millimeter‐wave generated by optical phase modulator
Authors: Tao Yao , Chen Lin , Goto Satoshi 
Published: March 2010

AbstractWe proposed and experimentally demonstrate a bidirectional orthogonal frequency‐division multiplexing‐radio‐over‐fiber (OFDM‐ROF) system by using an optical phase modulator and a fiber Bragger gating (FBG) to generate millimeter‐wave.The downstream date is 2.5‐Gb/s OFDM signals and the downstream wavelength is reused without signal erasure. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1335–1337, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25175
Design of a novel elliptical monopole UWB antenna with dual band‐notched function
Authors: Niu Shu‐Fei , Gao Guo‐Ping , Li Ming , Hu Yan‐Sheng , Li Bo‐Nian 
Published: March 2010

AbstractIn this article, a novel compact elliptical monopole ultra‐wideband antenna with dual notched bands is proposed and investigated. The dual‐notched characteristic is realized by an elliptic arc‐shaped slot inserted in the elliptical monopole and a compact coplanar waveguide resonant cell in the feed line. The measured results show that the frequency band of VSWR ≤2 covers 3.1 to 10.6 GHz UWB band, while the notched frequency bands are 3.45–3.75 GHz which covers 3.5 GHz WIMAX and 5–6 GHz which covers 5.15–5.85 GHz WLAN band, and the two notched bands are separately achieved. The proposed antenna has a monopole‐like radiation patterns. Gain of the proposed antenna and transfer function study show that dual band‐notched characteristics achieved which conforms with the results of VSWR. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1306–1310, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25176
A new balance‐fed disc‐slit monopole antenna for modern wireless systems
Authors: Chiu Cheng‐Nan , Lin Ya‐Jing 
Published: March 2010

AbstractThis article proposes a novel balance‐fed disc‐slit monopole antenna for modern wireless systems.The compact antenna is realized by merging a single‐ended disc‐slit monopole antenna with a defected‐ground balun. The resulting antenna has the special merits of high immunity against electromagnetic interference from nearby circuits and less sensitivity to size variation of the corresponding ground plane. A prototype was created and examined, and the results obtained demonstrate the promising performance of the newly proposed antenna. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1239–1240, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25182
A novel tri‐band rat race coupler with T‐shape step impedance transformers
Authors: Chu Qing‐Xin , Lin Feng 
Published: March 2010

AbstractA novel tri‐band 3‐dB rat race coupler operating at two arbitrary frequencies and their mean frequency is presented through replacing quarter‐wavelength impedance transformers in a conventional rat race coupler by T‐shape step impedance transformers, which can be equivalent to quarter‐wavelength impedance transformers at the three frequencies. Closed‐form design equations are derived. For verification, a microstrip tri‐band 3‐dB rat race coupler operating at 1.5/3.5/5.5 GHz is fabricated, aimed to cover the 1.5 GHz GPS band, and the 3.5/5.5 GHz WiMAX bands. Simulated and measured results are in good agreement. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1240–1244, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25186
Usage of an automated three‐stub water‐loaded impedance generator for RBF calibration of a waveguide ten‐port reflectometer
Authors: Monzó‐Cabrera Juan , Pedreño‐Molina Juan Luis , Lozano‐Guerrero Antonio José , Clemente‐Fernández Francisco Javier , Díaz‐Morcillo Alejandro 
Published: March 2010

AbstractIn this work, a waveguide impedance generator based on the use of three motor‐controlled metallic stubs, a monomode cavity loaded with water and PTFE cylinders is used to calibrate a waveguide ten‐port reflectometer.Radial basis function neural networks are used to learn the relationship between the actual reflection coefficient and the power detectors' output. Results indicate that this impedance generator can be successfully used to calibrate the ten‐port reflectometer. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1274–1277, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25187
Analog predistortion linearization of Doherty power amplifiers using bandwidth reduction of error signal
Authors: Lee Yong‐Sub , Lee Mun‐Woo , Kam Sang‐Ho , Jeong Yoon‐Ha 
Published: March 2010

AbstractThis article represents analog predistortion linearization of Doherty power amplifier (DPA) using bandwidth reduction of error signal. To verify our methods, two DPAs are implemented using a push‐pull GaN HEMT and a push‐pull Si LDMOS at 2.14 GHz and tested using the memory‐compensated analog predistorter with transistor‐based error generators and three‐branch nonlinear paths. From the measured four‐carrier WCDMA results, the proposed analog predistortion DPAs show the significant linearity improvement. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1313–1316, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.25190
Bandwidth enhancement of internal WWAN antenna using an inductively coupled plate in the small‐size mobile phone
Authors: Chang Chih‐Hua , Wong Kin‐Lu 
Published: March 2010

AbstractBy adding a small inductively coupled plate of size 10 × 45 mm2 to the system ground plane of the mobile phone with a short length of 60 mm only, wide lower and upper bands of its internal WWAN antenna (a printed monopole slot antenna in this study) to respectively cover the GSM850/900 and GSM1800/1900/UMTS bands can be obtained. The coupled plate is connected and vertically oriented to the system ground plane through a 10‐nH chip inductor, which effectively causes the small coupled plate to resonate at about 925 MHz. A new resonant mode contributed by the coupled plate is hence provided to enhance the bandwidth of the antenna's lower band, which is quickly decreased with decreasing ground plane length of the mobile phone. With the coupled plate added to the ground plane of length 60 mm, the obtained lower‐band bandwidth is about the same as that of the internal WWAN antenna for the ground plane of length 105 mm and without the coupled plate. Further, the antenna's upper band for the short ground plane of length 60 mm can still have wide bandwidth for both the cases with and without the coupled plate. Detailed effects of the inductively coupled plate on the bandwidth enhancement of the internal WWAN antenna are analyzed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1247–1253, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25196
CPW‐fed compact slot antenna for WLAN operation in a laptop computer
Authors: Naser‐Moghadasi M. , Sadeghi Fakhr R. , Danideh A. 
Published: March 2010

AbstractA rectangular slot antenna fed by a coplanar waveguide is proposed for dual‐band operations.The measured −10 dB bandwidth for return loss is from 2.05 to 2.65 GHz and 5.1 to 5.4 GHz, covering all the 2.4/5.2 GHz WLAN bands. A multi‐feed 12‐element planar array was designed and simulated. It shows that the features of small size, uniplanar structure, good radiation characteristics, and small mutual coupling are promising for multi‐input multi‐output applications in laptops. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1280–1282, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25198
A novel versatile multiband rectangular patch antenna
Authors: Singh L. Lolit Kumar , Gupta Bhaskar , Sarkar Partha P. , Yoshitomi K. , Yasumoto K. 
Published: March 2010

AbstractA novel simple single‐layer single‐feed asymmetric cross‐slot rectangular patch antenna with air dielectric (εr = 1) substrate providing hexa, penta, quad, and tri frequency bands operation is proposed and experimentally studied.The same antenna is giving hexa, penta, quad, and tri frequency bands of operation by changing the feed position only. The measured hexa frequency bands of operations are at 1.11, 1.89, 2.61, 3.12, 3.52, and 3.84 GHz. The measured penta frequency bands of operations are at 1.12, 1.89, 2.58, 3.49, and 3.82 GHz. The measured quad frequency bands of operations are at 1.47, 2.44, 3.49, and 3.85 GHz. The measured tri frequency bands of operations are at 1.92, 2.62, and 3.14 GHz. These values are in good agreement with simulation results. The measured radiation patterns at each measured frequency are also shown. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1348–1353, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25202
Novel printed CPW‐FED slot antenna for wireless applications
Authors: Shanmuganantham T. , Raghavan S. 
Published: March 2010

AbstractA novel design of compact coplanar waveguide (CPW)‐fed slot antenna for wireless applications is presented. It can operate in the IEEE 802.11a frequency band from 5 GHz to 5.5 GHz. The antenna is designed on a RT/duroid 5880 substrate with a permittivity 2.22 and with the size of 18.8 mm × 12.3 mm × 3.175 mm. The antenna has a 5% voltage standing wave ratio (VSWR) (2.3:1) bandwidth around 5.24 GHz. The fundamental parameters of the antenna, such as impedance, return loss, VSWR, and polarization are obtained. All meets the acceptable antenna standards. Simulation tool, based on the method of moments (ZELAND IE3D version 12.0), has been used to analyze and optimize the antenna. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1258–1261, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25210
Polyimide core 3D rectangular micro coaxial transmission lines
Authors: Natarajan Saravana P. , Hoff Andrew M. , Weller Thomas M. 
Published: March 2010

AbstractThis article introduces a 20‐μm tall, 75‐μm wide rectangular polyimide core micro coaxial transmission line that can be realized using a simplified fabrication procedure. Measurements of a 4‐bend, meandered micro coaxial line demonstrate an 8% increase in the insertion loss and a 2% variation in the phase compared with a straight line of equivalent length. Cross‐coupling below 30 dB up to 65 GHz has been measured between two micro coaxial lines separated by 175 μm. These properties make the structures as useful building blocks for highly miniaturized and integrated microwave circuitry. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1291–1293, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25212
Q‐factor investigation of antennas over metamaterials substrates
Authors: Collardey S. , Sharaiha A. , Abdouni W. , Niamien C. , Tarot A.‐C. 
Published: March 2010

AbstractIn this article, antennas over metamaterials substrates are investigated with the radiatingQfactor determined by using a time‐domain method.The main objective is to illustrate the electromagnetic behavior of this kind of complex structure by calculating its energy budget (stored and radiated energies). An example of a patch antenna using such materials is analyzed and experimental results are presented. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1321–1325, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25213
A 5‐bit CMOS phase shifter with low phase and amplitude error using a new 180° phase shifter featuring process‐variation immunity
Authors: Kang Dong‐Woo , Hong Songcheol 
Published: March 2010

AbstractIn this letter, a high‐performance 5‐bit CMOS phase shifter using a newly proposed 180° bit is presented for a Ku‐band mobile satellite phased array receiver. The 180° phase shifter exhibits good tolerance to substrate parasitic capacitances when compared with a conventional high‐pass/low‐pass type one. The designed 5‐bit CMOS phase shifter demonstrates a typical 11.7 dB ± 0.5 dB insertion loss and a 2.1° rms phase shift error at 12.2 GHz. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 1325–1328, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25214
1H and 13C NMR spectral data of bioactive cage‐like polycyclic compounds
Authors: Salles Roberta C. , Lacerda Valdemar , Beatriz Adilson , Ito Felicia M. , dos Santos Reginaldo B. , Greco, Sandro J. , de Castro Eustáquio V. R. , de Lima Dênis P. 
Published: March 2010

AbstractBioactive cage‐like polycyclic compounds have attracted the attention of several research groups because of their unique appearance and their biological activities. Their structures were established on the basis of 1H NMR and 13C NMR spectroscopic data. The 1H and 13C signal assignments and most homonuclear hydrogen coupling constants were assigned by use of techniques such as 1D 1H and 13C NMR and 2D gCOSY, non‐edited gHSQC and gHMBC. The gNOESY experiments proved the endo‐stereochemistry. Copyright © 2010 John Wiley & Sons, Ltd.
Mechanism and Kinetics of the Spontaneous Thermal Copolymerization of Styrene/Maleic Anhydride. Experimental and Simulation Studies in the Presence of 4‐oxo‐TEMPO
Authors: Mota‐Morales Josué D. , Quintero‐Ortega Iraís , Saldívar‐Guerra Enrique , Luna‐Bárcenas Gabriel , Albores‐Velasco Martha , Percino Judith , Chapela Víctor , Ocampo Miguel A. 
Published: March 2010

AbstractThe mechanism and kinetics of the spontaneous copolymerization of styrene (S) and maleic anhydride (MA) in the presence of 4‐oxo‐TEMPO nitroxide (N) were studied. Experiments were performed at 125 °C varying the S/MA and the N/S ratios and the evolution of conversion was measured by dilatometry up to 20% conversion. Clean induction periods or severe retardation in the initial stage of the reaction were observed. From a proposed kinetic mechanism a mathematical model was built, which was used for fitting the relevant kinetic constants for the self‐initiation steps, and the ratio ${{\bar {k}_{\rm p} } \mathord{\left/ {\vphantom {{\bar {k}_{\rm p} } {\bar {k}_{\rm t}^{{1 \mathord{\left/ {\vphantom {1 2}} \right. \kern-\nulldelimiterspace} 2}} }}} \right. \kern-\nulldelimiterspace} {\bar {k}_{\rm t}^{{1 \mathord{\left/ {\vphantom {1 2}} \right. \kern-\nulldelimiterspace} 2}} }}$. The model performs well in certain concentration regimes, but it remains a challenge to completely understand this complex system in other concentration regimes.magnified image
Morphology of Polymer/Clay Latex Particles Synthesized by Miniemulsion Polymerization: Modeling and Experimental Results
Authors: Mičušík Matej , Bonnefond Audrey , Reyes Yuri , Bogner Agnes , Chazeau Laurent , Plummer Christopher , Paulis Maria , Leiza Jose Ramon 
Published: March 2010

AbstractBA/MMA (90:10 wt.‐%) were copolymerized in the presence of two different organomodified clays (C30B and CMA16) and 1.6–2.6 wbm.‐% surfactants. The effect of the compatibility of the organoclay in the monomer mixture on the morphology of hybrid polymer/clay particles was determined using TEM. The resulting morphologies were compared with the prediction of a Monte‐Carlo simulation that determined the equilibrium morphology of monomer/clay hybrid miniemulsion droplets. The model predicted encapsulated morphologies only when the organoclay presented low clay/monomer and high clay/water interfacial tensions. C30B and CMA16 did not fulfill these conditions and provided a preferential surface location of the platelets on the polymer/water interphase as predicted by the model.magnified image
Life stories of people with rheumatoid arthritis who retired early: how gender and other contextual factors shaped their everyday activities, including paid work
Authors: Stamm T. A. , Machold K. P. , Smolen J. , Prodinger B. 
Published: March 2010

AbstractObjective: The aim of the present study was to explore how contextual factors affect the everyday activities of women and men with rheumatoid arthritis (RA), as evident in their life stories.Methods: Fifteen people with RA, who had retired early due to the disease, were interviewed up to three times, according to a narrative biographic interview style. The life stories of the participants, which were reconstructed from the biographical data and from the transcribed ‘told story’ were analysed from the perspective of contextual factors, including personal and environmental factors. The rigour and accuracy of the analysis were enhanced by reflexivity and peer‐review of the results.Results: The life stories of the participants in this study reflected how contextual factors (such as gender, the healthcare system, the support of families and social and cultural values) shaped their everyday activities. In a society such as in Austria, which is based on traditional patriarchal values, men were presented with difficulties in developing a non‐paid‐work‐related role. For women, if paid work had to be given up, they were more likely to engage in alternative challenging activities which enabled them to develop reflective skills, which in turn contributed to a positive and enriching perspective on their life stories. Health professionals may thus use some of the women's strategies to help men.Conclusion: Interventions by health professionals in people with RA may benefit from an approach sensitive to personal and environmental factors. Copyright © 2010 John Wiley & Sons, Ltd.
Characterizing the clinical practice and professional behaviour of rheumatology nurse specialists: a pilot study
Authors: Ryan Sarah , Hassell Andrew , Carpenter Elizabeth 
Published: March 2010

AbstractBackground: There is a need to characterize the practice of nurse specialists, for several reasons: to identify the skills and knowledge required for the role, to safeguard the role and to facilitate appropriate remuneration of activities.Objective: To develop an instrument, which characterizes the clinical and professional activities of rheumatology nurse specialists (RNSs).Methods: A questionnaire was produced, informed by the Nursing and Midwifery Council (NMC), to assess competencies in advanced nursing practice and completed by senior clinical rheumatology nurses in the UK undertaking an MSc in rheumatology nursing. Consenting respondents were also interviewed, to enable triangulation of the data.Results: A 38‐item questionnaire was produced. It comprised four sections: clinical activities, non‐patient‐based activities, professional behaviour and perceived confidence in a number of areas of practice. Thirteen nurses completed the questionnaire and seven of these took part in a telephone interview. All RNSs were engaged in the follow‐up care of patients with rheumatoid arthritis, providing education, psychological support, monitoring and changing of drug treatments, and referrals to other health professionals. The RNSs produced guidelines, conducted audits and provided mentorship. They had low levels of confidence in seeing new patients, presenting the results of an audit at a conference, and writing a business case.Conclusions: We have begun the process of developing a questionnaire that can identify the clinical activities, perceived self‐competence and professional behaviour of RNSs. This method of characterizing advanced nursing practice offers potential as a model for nurse specialists in other disciplines. Further work is required to validate the questionnaire on a large cohort of RNSs. Copyright © 2010 John Wiley & Sons, Ltd.
A literature review regarding the management of varicella‐zoster virus
Authors: Bond Deborah , Mooney Janice 
Published: March 2010

AbstractChickenpox and shingles (varicella‐zoster virus [VZV]) pose a threat to individuals who are immunosuppressed and/or have rheumatoid arthritis or another inflammatory musculoskeletal condition. In this paper we present a literature review of the condition, management and prevention. Copyright © 2010 John Wiley & Sons, Ltd.
Electron transport enhanced molecular dynamics for metals and semi‐metals
Authors: Jones Reese E. , Templeton Jeremy A. , Wagner Gregory J. , Olmsted David , Modine Nomand A. 
Published: March 2010

AbstractIn this work we extend classical molecular dynamics by coupling it with an electron transport model known as the two temperature model. This energy balance between free electrons and phonons was first proposed in 1956 by Kaganovet al. but has recently been utilized as a framework for coupling molecular dynamics to a continuum description of electron transport. Using finite element domain decomposition techniques from our previous work as a basis, we develop a coupling scheme that preserves energy and has local control of temperature and energy flux via a Gaussian isokinetic thermostat. Unlike the previous work on this subject, we employ an efficient, implicit time integrator for the fast electron transport which enables larger stable time steps than the explicit schemes commonly used. A number of example simulations are given that validate the method, including Joule heating of a copper nanowire and laser excitation of a suspended carbon nanotube with its ends embedded in a conducting substrate. Published in 2010 by John Wiley & Sons, Ltd.
A structural optimization method based on the level set method using a new geometry‐based re‐initialization scheme
Authors: Yamasaki Shintaro , Nishiwaki Shinji , Yamada Takayuki , Izui Kazuhiro , Yoshimura Masataka 
Published: March 2010

AbstractStructural optimization methods based on the level set method are a new type of structural optimization method where the outlines of target structures can be implicitly represented using the level set function, and updated by solving the so‐called Hamilton–Jacobi equation based on a Eulerian coordinate system. These new methods can allow topological alterations, such as the number of holes, during the optimization process whereas the boundaries of the target structure are clearly defined. However, the re‐initialization scheme used when updating the level set function is a critical problem when seeking to obtain appropriately updated outlines of target structures. In this paper, we propose a new structural optimization method based on the level set method using a new geometry‐based re‐initialization scheme where both the numerical analysis used when solving the equilibrium equations and the updating process of the level set function are performed using the Finite Element Method. The stiffness maximization, eigenfrequency maximization, and eigenfrequency matching problems are considered as optimization problems. Several design examples are presented to confirm the usefulness of the proposed method. Copyright © 2010 John Wiley & Sons, Ltd.