bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of cervical dystonia on employment: A retrospective analysis of the ability of treatment to restore premorbid employment status
Authors: Molho Eric S. , Agarwal Nitendra , Regan Katy , Higgins Donald S. , Factor Stewart A. 
Published: May 2009

AbstractUsing a structured interview method, we sought to address the following questions regarding cervical dystonia (CD) and employment: (1) what is the frequency and severity of job impairment in CD; (2) what are the clinical features that contribute to job impairment; (3) how does the effectiveness of botulinum toxin (BTx) compare to oral medications in restoring employment status. In our population of 155 CD patients, employment was affected by CD in 53.3% (31.2% reduced hours or responsibilities, 3.3% changed to different job, 18.9% loss of employment) and 68.9% of patients reported reduced overall productivity. The likelihood of altered employment (P < 0.0006), reduced productivity (P < 0.0001), and seeking disability benefits (P < 0.003) was significantly associated with the presence of neck pain, but not type of employment, spasmodic head motions, or duration of CD symptoms before treatment with BTx. Treatment with BTx was more likely to improve employment status than oral medications (66.1 vs. 18.5%) and much more likely to restore full employment with normal productivity (12.9 vs. 0.0%). These findings suggest that employment status is frequently affected by CD, particularly in patients withneck pain. BTx is significantly more effective than oral medications in restoring premorbid employment status. © 2009 Movement Disorder Society
Design of multi and wideband 3D fractal monopole antenna for wireless operations in L‐ and S‐bands
Authors: Rmili Hatem , Miane Jean‐Louis , Floch Jean‐Marie , Zangar Habib 
Published: May 2009

AbstractIn this article, a 3D multiband monopole fractal antenna was realized and characterized for radar and wireless communication operations. The fractal structure was obtained by using electrochemical deposition technique. The measured return loss of the proposed antenna present multi‐ and wideband behaviors. Three resonant bands around frequencies 1.4, 2.6, and 3.7 GHz with impedance bandwidth 16.6, 23.3, and 17.6% are observed, respectively. The measured gain is between 2 and 3 dBi at the cited resonant frequencies. The designed antenna permits various wireless operations in both L‐ and S‐bands such as radar detection and 2.4 GHz WLAN. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1976–1979, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24460
Wideband printed dipole antenna using a novel PBG structure
Authors: Yuan H.‐W. , Gong S.‐X. , Wang X. , Wang W.‐T. 
Published: May 2009

AbstractA wideband printed dipole antenna with an integrated balun feed is given. To further get larger bandwidth capabilities of this antenna, a novel low‐cost smaller unit‐cell planar photonic bandgap (PBG) structure is etched onto the antenna surface, and a better dipole antenna is fabricated. Through optimizing the sizes of PBG structure, a 56.7% bandwidth is obtained where voltage standing wave ratio (VSWR) is less than 1.5 while a 36% bandwidth is obtained from initial structure. Agreement between calculations and measurements is very good. The result indicates that the novel design may obtain better wideband characteristic. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1862–1865, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24466
Design of an integrated loop coupler and loop antenna for RFID applications
Authors: Bancroft Randy 
Published: May 2009

AbstractThe design of a novel planar loop antenna with an integrated coupling loop for RFID applications is described. The antenna consists of a center nonradiating coupling loop, which acts as a phase shifter to produce a radiating current distribution on the outer loop. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1830–1833, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24467
Cavity embedded GPS antenna in GSM wire‐patch radiating element
Authors: Zaid L. , Staraj R. 
Published: May 2009

AbstractThis article describes a complete low cost radiating structure, combining a stacked wire‐patch GSM antenna, with an active GPS printed element located in a cavity realized in the upper plate of the GSM radiating element. GPS active amplifier and filter are located under the ground plane of GPS antenna and receive the DC bias voltage trough the GPS coaxial probe feed. The GSM antenna is a low profile, large bandwidth antenna, having a dipolar radiation pattern. An isolation system is integrated in the structure to avoid small ground plane problems. This structure, totally protected by a low cost dielectric radome is very suitable for automobile applications needing a very small ground plane. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1896–1899, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24473
Compact slot antenna for 2.4 GHz/UWB with dual band‐notched characteristic
Authors: Zha Feng‐Tao , Gong Shu‐Xi , Liu Gang , Yang Hong‐Yu , Lin Shu‐Guang 
Published: May 2009

AbstractA novel compact microstrip slot antenna for 2.4–2.5 GHz (WLAN) band and ultra‐wideband is proposed and fabricated. Two single ring split resonators are etched in the feed line to obtain dual band‐notched function in the 5 GHz WLAN band and ITU 8025–8400 MHz band, respectively. The entire antenna only occupies a volume of 33 mm × 35.5 mm × 1 mm. The proposed antenna is analyzed both numerically and experimentally. The measured results and simulated results reach good agreements. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1859–1862, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24475
Miniaturized dual‐mode bandpass filter using stub‐loaded square ring resonator
Authors: Singh Yatendra K. , Chakrabarty Ajay 
Published: May 2009

AbstractThis article presents a novel miniaturized bandpass filter using a square ring. Each side of the ring is loaded almost at one of the ends with a stub. The stub increases the current path length; bring down the resonance frequency of the ring. The other end of each stub is terminated with a square patch whose size is kept such so as to give a dual‐mode characteristic. The proposed filter offers a size reduction of 67% over an unloaded square ring resonator. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1927–1929, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24482
CPW‐fed ultrawideband square antenna with round corners, a trident‐shaped feeding strip and semielliptic ground
Authors: Wang J. , Zhang H. 
Published: May 2009

AbstractA novel coplanar waveguide (CPW) fed monopole ultrawideband antenna is proposed to operate from 2.1 to 13.4 GHz. It consists of a square radiator with round corners, a trident‐shaped feeding strip, and semielliptic ground. By use of these techniques, the operating bandwidth and radiation performance (approximate omni‐directional pattern) can be improved. And then, the relationship between the return loss curves and the geometry of the trident‐shaped feeding strip was gotten. Finally, good agreement has been obtained between the simulation and experiment. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1924–1927, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24483
ACS fed printed F‐shaped uniplanar antenna for dual band WLAN applications
Authors: Deepu V. , Sujith R. , Mridula S. , Aanandan C. K. , Vasudevan K. , Mohanan P. 
Published: May 2009

AbstractAn asymmetric coplanar strip (ACS) fed dual band F‐shaped antenna covering the 2.4/5.2 GHz WLAN bands is presented. The optimized dimensions of the proposed uniplanar antenna are 21 mm × 19 mm when printed on a substrate of dielectric constant 4.4 and height 1.6 mm. The dual band nature of the antenna is brought about by the various current paths in the F‐shaped structure and the ground plane. The antenna exhibits nearly omnidirectional radiation characteristics and moderate gain in both the operating bands. Details of the antenna design, simulation, and experimental results are presented and discussed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1852–1856, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24486
A 5.7‐GHz low‐noise amplifier with source‐degenerated active inductor
Authors: Chu Chun‐Hsueh , Huang I‐Lun , Lin Yih‐Hsia , Gong Jeng 
Published: May 2009

AbstractThis article presents a novel application of the active inductor in the design of the low‐noise amplifier (LNA). To reduce the silicon area consumed by the LNA without sacrificing its linearity, the passive source‐degenerated inductor in the conventional design is replaced with the active inductor. The LNA is fabricated with a standard 0.18‐μm CMOS process. Compared with previous arts, this LNA exhibits good figure of merit based on its total power consumption of 19 mW, measured power gain of 17 dB, input third‐order intercept point of −7 dBm, and noise figure of 3.4 dB at 5.7 GHz. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1955–1958, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24493
A high‐efficiency power amplifier using multilevel digital pulse modulation
Authors: Kim Hyunjin , Jeon Youngsang , Lee Jaejun , Lee Sungho , Nam Sangwook 
Published: May 2009

AbstractThis article introduces a new architecture for a high‐efficiency linear transmitter using a pulse modulated envelope signal. The transmitter employs multilevel PWM to represent the baseband signal. By using multilevel PWM, the efficiency of the power amplifier can be improved compared with that using the conventional PWM. To demonstrate the validity of the proposed architecture, a transmitter using three‐level PWM is implemented and tested with the CDMA IS‐95A signal. The measured PAE, including isolator and filter loss, is 37.6% at 21.6 dBm average output power and the linearity requirements are satisfied. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1921–1924, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24494
Interference artifact reduction by multiangle illumination in millimeter wave images: Model and experimental validation
Authors: Zhang Lixiao , Koers Gaetan , Stiens Johan 
Published: May 2009

AbstractSuccessful interference artifact reduction in mm‐wave images by multiangle illumination is presented. Imaging simulations were performed in a Fourier‐domain coherent optics framework. Both the model and experimental results show that interference patterns highly depend on the illumination angles and can be reduced by simply processing the multiangle images. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1845–1848, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24498
An internal multiband antenna for WLAN and WWAN applications
Authors: Chiu Chien‐Wen , Chi Yu‐Jen , Deng Sheng‐Ming 
Published: May 2009

AbstractIn this letter, we propose a novel multiband antenna which can be integrated into a laptop computer for WLAN and WWAN applications. The antenna, evolved from a dual‐band inverted‐F antenna, is mounted on the top‐edge of a vertical ground plane of LCD panel. By adding four parasitic resonators which are short‐circuited quarter‐wavelength elements, the antenna can achieve wideband performance to cover GSM850/GSM900/DCS/PCS/UMTS and 802.11a/b/g. A simulation was performed by HFSS to optimally design the antenna, and then a practical structure was also fabricated to verify the simulation results. The measured antenna parameters as well as the radiation efficiency are presented to validate the proposed antenna. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1803–1807, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24501
Dual‐mode ring resonators with inductive ω‐shaped perturbations for miniaturizations and dual‐bands
Authors: Liu Ji‐Chyun , Liu Ta‐Cheng , Zeng Bing‐Hao , Chou His‐Chiang 
Published: May 2009

AbstractNovel inductive Ω‐shaped perturbations for dual‐mode ring resonators (DMRR) to design dual‐band band‐pass filter with size reduction are presented in this article. Both inductive Ω‐shaped perturbations in DMRR and DMDRR (Dual‐Mode Double Ring Resonator) are studied to improve the performance of the conventional DMRR and DMDRR. Significant size reductions over 56 and 10% are achieved at dual‐band 1.13 and 2.11 GHz, respectively. To obtain a lower insertion loss (2.49/0.75 dB), higher rejection (−19.93/−16.41 dB), and wider bandwidth (about 4.82/16.45%) responses, the miniaturized DMDRR filter are presented. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1986–1991, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24502
An extremely miniaturized 15‐GHz CMOS distributed voltage‐controlled oscillator
Authors: Chirala Mohan K. , Nguyen Cam 
Published: May 2009

AbstractA distributed voltage‐controlled oscillator (DVCO) employing novel multilayered inductors is implemented in a standard 0.18‐μm CMOS process. The DVCO is at least 90% smaller than the earlier reported DVCOs and its core occupies a mere 348 μm × 195 μm or 0.06 mm2, making it the smallest distributed VCO reported in any monolithic technology to date. The VCO employs a four‐stage unstable distributed amplifier and generates a fundamental signal at 14.9 GHz with a phase noise of −100.2 dBc/Hz @ 1 MHz offset and a 12% tuning range. The circuit consumes 34 mW of DC power and provides −0.8 dBm of output power. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1953–1955, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24504
WDM ring performance improvement by means of four‐wave mixing crosstalk minimization algorithm
Authors: Reis J. D. , Neto B. , André P. S. , Teixeira A. 
Published: May 2009

AbstractAn automatic method to assess and minimize the impact of four‐wave mixing crosstalk in WDM ring channels is presented. The objective is achieved by applying a genetic algorithm, which optimizes channel frequencies and tunes powers. This technique improvement result is validated experimentally. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1949–1952, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24505
Application of the FCEL method to a microstrip disk antenna with a parasitic director
Authors: Berbar T. B. , Azrar A. , Zerguerras A. , Aksas R. 
Published: May 2009

AbstractThe method of finite coupled elementary lines (FCEL) is used in the analysis of a microstrip disk antenna with a larger parasitic director. A closed form expression of the effective radius for the used structure is proposed. The obtained numerical results are compared with published measurements and good agreement is noticed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1911–1918, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24506
Compact UWB planar monopole antenna with band‐notch function
Authors: Zhang Li‐Na , Zhong Shun‐Shi , Du Chen‐Zhu , Chen Jun‐Hua 
Published: May 2009

AbstractA new band‐notch ultrawideband (UWB) printed monopole antenna is proposed, where the band‐notch characteristic is realized by introducing a microstrip feeder with a tuning stub. The simulation results agree well with the measured ones, showing that the proposed antenna provides an operating band ranging from 2.9 to 11.6 GHz, a notched band from 5.0 to 5.9 GHz, and a good omni‐directional far‐field radiation in the H‐plane. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1908–1911, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24507
Design of a small, low‐profile print antenna using a Peano line
Authors: Terada Takashi , Ide Kazuki , Iwata Kazuki , Fukusako Takeshi 
Published: May 2009

AbstractThis article describes a small, low‐profile linear antenna that is fed at the tip of a half‐wavelength element to maintain the input impedance high with a metallic reflector at a position near the antenna. A CPW‐like port at one end of a linear element yields a capacitive coupling with the metallic reflector resulting in a resistance of 50 Ω at the serial resonant frequency. Using this feed structure, a low‐profile electrically small antenna using a Peano line antenna is presented. The antenna gain and radiation efficiency of this antenna is compared with those of a meander antenna with the same dimensions and feed structure. The radiation efficiency of the Peano line antenna increases by ∼2 dB compared with that of the meander line at the 1‐GHz band. Finally, the polarization parameters are presented. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1833–1838, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24511
A compact 1‐to‐8 planar spatial power divider/combiner
Authors: Yan Jun‐Mei , Chu Qing‐Xin 
Published: May 2009

AbstractA compact 1‐to‐8 planar spatial power divider/combiner is proposed. It employs two dielectric substrates with a common ground plane. Two transitions are cascaded to divide power equally. The first transition is from a parallel stripline to two microstrip lines and the second transition is from oversized microstrip line to parallel multiport microstrip lines. A line taper is inserted to provide impedance match. The proposed structure is compact and has little possibility to stimulate high‐order modes wave. A working prototype at 4–6 GHz is designed and fabricated. Measured results show a good agreement with simulated ones and an input reflection coefficient of less than −15 dB is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1998–2001, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24514
Perineuritis in acute lyme neuroborreliosis
Authors: Elamin Marwa , Alderazi Yazan , Mullins Gerard , Farrell Michael A. , O'Connell Sue , Counihan Timothy J. 
Published: May 2009

AbstractPerineuritis is an unusual cause of direct peripheral nerve injury. We describe the clinicopathologic features of a 56‐year‐old man with mononeuritis multiplex due to Lyme disease; sural nerve biopsy demonstrated florid perineuritis. Treatment with intravenous ceftriaxone resulted in marked neurologic improvement. This study supports the notion that perineuritis forms part of the pathogenesis in acute Lyme neuroborreliosis. Muscle Nerve, 2009
Mikrokapseln — ein runde Sache
Authors: Brandau Thorsten 
Published: May 2009

AbstractDie Kunst, Substanzen zu umhüllen, verändert die Lebensmitteltechnik: Nun entfalten sich Aromen langsam, Zusatzstoffe wirken erst im Magen, und Champagner findet neue Herstellungsmethoden.
Screening options for Down syndrome: how women choose in real clinical setting
Authors: Lo T. K. , Lai F. K. , Leung W. C. , Lau W. L. , Ng L. S. , Wong W. C. , Tam S. S. , Yee Y. C. , Choi H. , Lam H. S. W. , Sham A. S. Y. , Tang L. C. H. , Chin R. K. H. 
Published: May 2009

AbstractObjectiveTo study pregnant women's preference among various screening options for Down syndrome (DS) in routine clinical setting, and its potential association with women's demographic characteristics.MethodsWomen aged 35 years and older carrying singleton pregnancy were offered a variety of screening tests for DS before 14 weeks of gestation. Their preference was confirmed by the test they actually underwent. The association between women's choice of test and a number of demographic characteristics was studied using multinomial regression.ResultsAmong 1967 eligible women, 619 opted for first‐trimester screening test (FTS), 924 for partial integrated test (PIT), and 424 for full integrated test (FIT). Nulliparous women and working mothers were more likely to choose FTS and FIT. Women with history of subfertility were more likely to choose FIT. Women with family history of chromosomal abnormalities were more likely to choose FTS. The choice of screening test could be predicted for 49.9% of women using four demographic characteristics.ConclusionsAmong older women of predominantly Chinese ethnicity, integrated test is a favorite alternative to FTS. Their choice of DS screening test can be predicted by their obstetric and socioeconomic characteristics. Many women show willingness to pay for a test with a lower false‐positive rate. Copyright © 2009 John Wiley & Sons, Ltd.
Analytical model of solar thermophotovoltaic systems with cylindrical symmetry: Ray tracing approach
Authors: Datas A. , Algora C. 
Published: May 2009

AbstractAn analytical model for a full solar thermophotovoltaic (STPV) system with cylindrical symmetry is presented. In contrast to the already published TPV models, this model considers both TPV optical cavity and absorber (or heating) systems. An analytical ray‐tracing method has been used to analyse the radiation interchange within a TPV optical cavity. It allows us to calculate the portion of the absorbed power in each component within the system. Using this model, a broad analysis of an STPV system has been carried out, finding the optimum configurations and presenting a detailed loss analysis. Copyright © 2009 John Wiley & Sons, Ltd.
Student–teacher relationships matter: Moderating influences between temperament and preschool social competence
Authors: Griggs Marissa Swaim , Gagnon Sandra Glover , Huelsman Timothy J. , Kidder‐Ashley Pamela , Ballard Mary 
Published: May 2009

AbstractEcological approaches to preschool assessment, which consider both within‐child and environmental variables, are considered best practice for school psychologists. This study employs such a model to investigate the interactive influence of child temperament and student–teacher relationship quality on peer play behaviors. Parents of 44 preschool children (25 girls, 19 boys) ranging in age from 40 to 68 months (mean [M] = 53.00) and primarily White (92.9%) provided ratings of their children's temperaments on the Behavioral Style Questionnaire. Their teachers completed the Student–Teacher Relationship Scale and the Penn Interactive Peer Play Scale. Results indicate that (a) student–teacher relationships characterized by low conflict and low dependence are associated with less disruptive peer play, and (b) the association between temperament and disruptive play is attenuated in low conflict student–teacher relationships. Implications for school psychologists include the importance of student–teacher relationships in the context of preschool assessment and intervention planning. © 2009 Wiley Periodicals, Inc.
English language learners' and non–English language learners' perceptions of the classroom environment
Authors: LeClair Courtney , Doll Beth , Osborn Allison , Jones Kristin 
Published: May 2009

AbstractThis study examines the degree to which English language learners' (ELL) descriptions of classroom supports for learning are similar to or different from the descriptions of non‐ELL students. Specifically, the study compared the classroom perceptions of ELL students and general education students using the ClassMaps Survey (CMS), which includes indices of classroom relationships (teacher–student, peer, and home–school) and supports for self‐regulation (self‐efficacy, self‐determination, and self‐control). It was hypothesized that the CMS subscale scores would differ for the two student groups. Results indicated that ELL students rated themselves significantly lower in academic efficacy and rated their classmates as more likely to follow class rules compared to the ratings of non‐ELL students. Implications for practical application of the results and suggestions for future research are discussed. © 2009 Wiley Periodicals, Inc.