bluuebunny/crossref_metadata_2025_split huggingface dataset:
Neuropsychiatric and cognitive features in autosomal‐recessive early parkinsonism due to PINK1 mutations
Authors: Ephraty Lilach , Porat Omer , Israeli David , Cohen Oren S. , Tunkel Olga , Yael Shinar , Hatano Yasaku , Hattori Nobutaka , Hassin‐Baer Sharon 
Published: January 2007

AbstractAutosomal‐recessive early‐onset Parkinsonism (AREP) due to PINK1 mutations is characterized by an early‐onset, slowly progressive disease, with a good response to levodopa. Psychiatric and cognitive disturbances associated with AREP have rarely been reported in the literature. We describe 2 brothers from a Jewish–Iraqi consanguineous family with a homozygous PINK1 nonsense mutation. Both patients presented with anxiety and dysphoria accompanied by a gait disturbance that developed subsequently into a clinical depression. During the course of the disease, both developed drug‐induced behavioral disturbances of the hedonistic homeostatic dysregulation type and 1 had drug‐induced psychosis. The first patient had been diagnosed with mild mental retardation and during the 22 years of disease had further deteriorated; the second developed frontal‐type dementia at an early age, 20 years after onset. Their father had a psychiatric disorder but no Parkinsonism. This report expands the phenotypic profile of PINK1‐related disease, presenting unique psychiatric and cognitive features as part of the clinical picture. © 2007 Movement Disorder Society
New device to control combined lingual and palatal myoclonus
Authors: Mondria Tjeerd , de Gier Henriëtte H.W. , Boon Agnita J.W. 
Published: January 2007

AbstractLingual myoclonus is a poorly understood disorder that may occur in isolation or combined with palatal myoclonus. In this report, we present the case history of a 21‐year‐old patient with a therapy‐resistant essential lingual and palatal myoclonus where a simple dental device was able to control symptoms. The use of this device will be highlighted and compared to previously described methods. Cases of previously recorded lingual and palatal myoclonus will be reviewed and compared to the case of our patient. © 2007 Movement Disorder Society
Are nongenetic triggers for dystonia type‐specific? A study exploring scoliosis in blepharospasm
Authors: Martino Davide , Defazio Giovanni , Abbruzzese Giovanni , Marchese Roberta , Fabbrini Giovanni , Decembrino Venturino , Berardelli Alfredo 
Published: January 2007

AbstractWe previously observed that diseases of the anterior ocular segment predispose to primary blepharospasm, but not to other focal dystonias. In this multicenter study, we tested whether prior scoliosis, which increases the risk of developing cervical dystonia, is also a predisposing factor to blepharospasm. The frequency of scoliosis did not differ between blepharospasm patients and controls. This finding supports the hypothesis that environmental risk factors may be specific for a single form of adult‐onset dystonia. © 2007 Movement Disorder Society
Bereitschaftspotential and movement‐related potentials: Origin, significance, and application in disorders of human movement
Authors: Colebatch James G. 
Published: January 2007

AbstractThe existence of a slow negative wave, the Bereitschaftspotential (“BP”), preceding voluntary movement by 1 second or more was first reported more than 40 years ago. There appears to be considerable interindividual differences, but there is general agreement that the initial negativity actually consists of two distinct phases. Uncertainty remains about many other properties and features of the response, including nomenclature, which makes the existing literature difficult to synthesize. The duration of the premovement negativity raises questions about how and when voluntary movement is initiated. Premovement negativities can also be seen before (predictably) externally paced movement, and these have similarities to the BP. Although lateralized generators exist, it is likely that the majority of the early component of the BP (BP1 or early BP), arises from the anterior supplementary motor area (SMA) and more rostral pre‐SMA. The late phase of the BP (BP2 or late BP) is probably generated by activity in both the SMA proper and the contralateral motor cortex. Changes in the BP occur in several movement disorders, notably Parkinson's disease, in which the pattern is consistent with a failure of pre‐SMA activation. The presence (or absence) of a clear preceding negativity can also have diagnostic importance for certain movement disorders. © 2007 Movement Disorder Society
Prevalence of essential tremor in the territory of Lake Trasimeno, Italy: Results of a population‐based study
Authors: Mancini Maria Luisa , Stracci Fabrizio , Tambasco Nicola , Sarchielli Paola , Rossi Aroldo , Calabresi Paolo 
Published: January 2007

AbstractBecause of the great variability in previous epidemiological data, and in light of the more accurate definition and diagnostic criteria recently formulated, we designed the present study to evaluate the prevalence of essential tremor (ET) in an Italian population. The study population included 13,604 individuals, who represented all patients of 11 family doctors working in the Territory of Lake Trasimeno in central Italy. Assessment of the sample and selection of the suspected cases were carried out by the same family doctors, previously trained to apply the inclusion and exclusion criteria for the definition of ET based on the Classification Criteria of the Movement Disorder Society (1998) and the Guidelines of the Ad Hoc Committee (2000). The total population was assessed over a period of 12 months. The age‐adjusted prevalence of ET was 1.21% (95% confidence interval, 0.83–1.76). The probability of presenting with ET tended to increase with age and males showed a 50% greater risk for developing ET (male/female ratio = 1.5 for each age class). Our results are in line with the most recent epidemiological findings, which suggest a lower prevalence of ET than in older studies. These results can be attributed to the application of more stringent diagnostic criteria. © 2007 Movement Disorder Society
A CPW linear resonator method for the microwave characterization of high dielectric constant films
Authors: Demenicis Luciene S. , Lima Rodolfo A. A. , Conrado Luiz Fernando M. , Margulis Walter , Carvalho Maria Cristina R. 
Published: January 2007

AbstractA coplanar waveguide linear resonator technique for the experimental characterization of the dielectric properties of films in the microwave frequency range at room temperature is proposed. The approach is simple to implement as it consists of a film with unknown high dielectric constant deposited over the resonator, printed on standard alumina substrate using conventional photolithography process. The technique is illustrated by the measurement of the dielectric constant and losses of various ceramic screen‐printed thick films: BaTiO3 (BTO), CaCu3Ti4O12 (CCTO), and a BTO(x)–CCTO(1 − x) composite with different concentrations (x = 0.2, 0.5, and 0.8). © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 521–524, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22176
The study of the polarization properties of the large‐mode‐area fiber amplifier applied in coherent combination
Authors: Guo Zhancheng , Fu Shenggui , Liu Yange , Jia Xiujie , Si Libin , Jin YanLi , Yuan Shuzhong , Dong Xiaoyi 
Published: January 2007

AbstractBased on the maser oscillator power amplifier configuration including a single mode erbium‐doped fiber laser used as the signal source and a large‐mode‐area Erbium/Ytterbium double‐clad fiber used as the gain medium, the polarization states of the signal light and the amplified signal light were experimentally investigated. The results showed that the degree of polarization of the output of the amplifier was low without taking any polarization control measure; after inserting a polarizer in the loop of the signal source, the degree of polarization was improved evidently and the stability of the polarization state became better, whether for continuous wave operation or for mode‐locked operation. The mode‐locked operation had a little lower degree of polarization and a better Polarization state (PS's) stability than the CW operation of the output of the amplifier. So, a combination use of a polarizer and a polarization controller could improve the polarization degree and adjust the polarization state of the amplified signal light. This work offered an important experimental basis for the control of the PS in the laser beam coherent combination. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 516–518, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22178
An enhanced bandwidth planar inverted‐F antenna with a modified shorting strip
Authors: Park Hoon , Jung Heekyung , Hong Sukjin , Choi Jaehoon 
Published: January 2007

AbstractThis article presents a novel design method for a wideband planar inverted F‐antenna that simultaneously covers GSM900, GPS, DCS1800, IMT2000, WLAN, and DMB services. The proposed antenna consisted of a main patch with stubs, an I‐shaped patch, and a modified shorting strip. It had dimensions of 16 × 36 × 6 mm3. The dual band characteristic could be achieved by changing the length of a main patch. A very wide impedance bandwidth characteristic was obtained by optimizing the length of stubs, an I‐shaped patch, and a modified shorting strip. Commercial electromagnetic software, CST Microwave Studio, was used to design the structure. The maximum gains at the frequencies of 915, 1576, 1785, 2170, 2400, and 2630 MHz were 1.0, 2.7, 5.4, 4.56, 1.52, and 2.95 dBi, respectively. The overall radiation pattern was suitable for mobile applications. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 513–515, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22179
A comparative study of diversity gain and spatial coverage: Fixed versus reconfigurable antennas for portable devices
Authors: Roach T. L. , Huff G. H. , Bernhard J. T. 
Published: January 2007

AbstractThis study investigates the performance of planar fixed and/or pattern reconfigurable antennas on a model laptop in terms of diversity gain and spatial coverage. The reconfigurable antenna used in this work has the ability to change its radiation pattern from endfire to broadside while operating over a common impedance bandwidth. The research combines diversity gain and spatial coverage into a single parameter that takes into account the effects of both simultaneously. Experimental data, including the resulting diversity gain and spatial coverage calculations, are presented. This work reveals the possibilities and importance of using reconfigurable radiation antennas and weighs their potential impact on high performance wireless systems. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 535–539, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22181
Rectangular waveguide‐to‐CPW transition without air‐bridge in the Ka‐band
Authors: Ramdane A. , Richalot E. , Picon O. , Puech J. , Lapierre L. 
Published: January 2007

AbstractThe proposed waveguide‐to‐CPW transition is uniplanar, in line with the waveguide, and without air‐bridge. Composed of a fin‐line taper and a circular phase‐shifter, it presents in simulation an insertion loss and a return loss better than 0.63 and 16.8 dB between 27 and 31 GHz. Measurements of the back‐to‐back structure are presented. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 510–513, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22182
Novel all‐optical format conversion using an ultrafast‐nonlinear interferometer at 10–40 Gbit/s
Authors: Li Da , Zhang Xinliang , Huang Dexiu 
Published: January 2007

AbstractAll‐optical data format conversion from nonreturn‐to‐zero (NRZ) to pseudoreturn‐to‐zero (PRZ) using an ultrafast nonlinear interferometer has been proposed and demonstrated for the first time. Stable format conversion from NRZ to PRZ has been achieved at 10–40 Gbit/s. This scheme may be useful for all‐optical clock recovery in high‐speed optical communication systems. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 508–510, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22183
Small size Ka‐band monolithic fourth‐harmonic image rejection mixer
Authors: Yang Tao , Yang Ziqiang , You Yu , Li Can 
Published: January 2007

AbstractA 30–40‐GHz monolithic fourth‐harmonic image rejection mixer is designed. The mixer employs a fourth‐harmonic mixer with a reduced‐size 0°/180° Marchand Balun and two resistive field‐effect transistor mixer cells. The chip size is only 1.9 × 1.4 mm2, which is equal to or even smaller than that of the reported Ka‐band monolithic subharmonic image rejection mixer. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 505–507, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22186
A compact UWB antenna with CPW‐fed
Authors: Lin Ding‐Bing , Tang I‐Tseng , Tsou Ming‐Yu 
Published: January 2007

AbstractA CPW‐fed monopole ultra wide band (UWB) antenna, which has small dimension of (15.5 × 17 mm2), is proposed. To miniaturize the antenna size, the sunken ground plane and narrow feeding‐strip are introduced. A slot notched on the center of radiator is used to fine‐tune the impedance matching at high frequency part. The optimal dimensions can be achieved by a parametric analysis. The designed antenna operates over 3.08–10.6 GHz for VSWRf2. The antenna also shows omnidirectional radiation patterns and good gain flatness that is suitable for UWB applications. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 564–567, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22188
Broadband planar shorted monopole antenna for DTV signal reception in a portable media player
Authors: Li Wei‐Yu , Wong Kin‐Lu , Row Jeen‐Sheen 
Published: January 2007

AbstractA novel broadband planar shorted monopole antenna suitable for digital television (DTV) signal reception for portable media player (PMP) applications is presented. The proposed shorted monopole antenna uses an internal matching circuit consisting of a chip capacitor and two narrow strips, which leads to a wide operating bandwidth (2.5:1 VSWR) of 340 MHz (about 53% centered at about 638 MHz) for the antenna. This wide bandwidth makes it very suitable for DTV signal reception in the 470–806 MHz band. In addition, owing to its planar structure, the proposed antenna can be firmly attached onto the surface of the PMP casing, when not in operation. This property is attractive for keeping the aesthetic appearance of the PMP equipped with the proposed antenna. Details of the experimental and simulation results are presented and analyzed. The design approach of selecting a proper chip capacitor for the proposed antenna is also discussed. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 558–561, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22189
Dual‐mode microstrip bandpass filter with spurious response suppression
Authors: Chen Jian‐Xin , Xue Quan 
Published: January 2007

AbstractA dual‐mode bandpass filter (BPF) using microstrip patch resonator is proposed. Open‐stubs are added on the feed‐lines to suppress the spurious response and improve the stopband rejection effectively with little increase in circuit size. Furthermore, a reduced‐size dual‐mode BPF with spurious response suppression using microstrip slotted‐patch resonator is successfully designed. The simulated and measured results are presented and both are in good agreement. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 556–558, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22190
Optimal symplectic integrators for numerical solution of time‐domain Maxwell's equations
Authors: Huang Z. X. , Wu X. L. , Sha W. , Chen M. S. 
Published: January 2007

AbstractOptimal symplectic integrators were proposed to improve the accuracy in numerical solution of time‐domain Maxwell's equations. The proposed symplectic scheme has almost the same stability and numerical dispersion as the mostly used fourth‐order symplectic scheme, but acquires more efficiency in the calculations at the same computational cost. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 545–547, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22193
Silicon bulk micromachined electromechanical switches with four cantilever piezoelectric actuators
Authors: Park Jae Yoeng , Lee Hee Chul , Yang Chang Soo 
Published: January 2007

AbstractIn this article, silicon bulk micromachined RF MEMS switch with four cantilever piezoelectric actuators has been designed, fabricated, and characterized for advanced mobile/wireless communication systems. The proposed switch is comprised of four piezoelectric cantilever actuators, a contact metal pad, and a suspended CPW signal line above the silicon substrate. The fabricated piezoelectric switch has an insertion loss of −0.23 dB and an isolation of −44 dB at a frequency of 2 GHz and an operation voltage of 2.5 V, respectively. Also, it has constant performance characteristics at the certain range of applied voltages above the operation voltage that result in high production yield. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 570–573, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22195
New design of a CPW‐fed ultrawideband slot antenna
Authors: Sun Jwo‐Shiun , Lee Yi‐Chieh , Lin Syuan‐Ci 
Published: January 2007

AbstractA new design of slot antenna by CPW‐fed is proposed for ultrawideband (UWB) applications. The proposed antenna consists of a CPW‐fed and a pair of symmetry curved radiating slot. The designed tapered slot antenna covers the bandwidth from 3 to 20 GHz. Simulated and measured results of the new design CPW‐fed UWB slot antenna show fairly good performance. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 561–564, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22197
RETRACTED: Reduced‐sized single coupled‐line low‐pass filter
Authors: Tseng J.‐D. , Chen P.‐S. 
Published: January 2007

AbstractA low‐pass filter consisted of one inner‐connected coupled‐line and two open‐stub transmission lines possessed quasi‐elliptic frequency response and wide rejection bandwidth is proposed. The analysis is based on transmission line and coupled‐line circuit model. Two‐port impedance matrices and a T‐type equivalent circuit were derived. On the basis of this equivalent circuit, a circuit with 3 dB cutoff frequency at 2.45 GHz were designed, simulated, and measured. The simulated and measured results are in good agreement within 0–12 GHz. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 612–615, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22199
High power 60 GHz push push oscillator using InALAs/InGaAs metamorphic HEMT technology
Authors: Lee J.‐W. , Kim S.‐W. , Seol K.‐S. , Kwon Y. , Seo K.‐S. 
Published: January 2007

AbstractThis paper reports a high power 60 GHz push–push oscillator fabricated using 0.12 μm GaAs metamorphic high electron‐mobility transistors. By combining high‐power metamorphic high electron mobility transistor (MHEMT) optimized for millimeter‐wave operation and push–push technique, the oscillator achieved 7.4 dBm of output power at 59 GHz with 37 dBc fundamental frequency suppression. To the knowledge of the authors, this is the first monolithic push–push oscillator at V‐band fabricated using MHEMT technology. Also, the 7.4 dBm of output power is the largest for any oscillators based on MHEMT in this frequency range, and compares well to the result obtained from mature GaAs PHEMT technology. The results demonstrate the application of high power MHEMT for cost effective millimeter‐wave commercial applications. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 609–612, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22203
New microstrip fractal‐shaped triangular patch resonators filters
Authors: Zhang Sheng , Xiao Jian‐kang , Li Ying 
Published: January 2007

AbstractTwo types of bandpass filters using fractal‐shaped triangular resonators are proposed and optimized in this article. By using etched fractal‐shaped defected structures in the triangular patch resonators, the filters have remarkable advantages, such as compact size, high selectivity, and simple structure. The effects of varying the parameters of the fractal‐shaped structures have been studied. Measured results of the filter using three fractal‐shaped structures agree well with the simulated ones. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 581–583, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22205
Calibration 90 nm node RF MOSFETs, including stress degradation
Authors: Kao H. L. , Kao C. H. , Chin A. , Liao C. C. 
Published: January 2007

AbstractUsing a microstrip line layout, a low minimum noise figure (NFmin) of 0.51 dB, at 10 GHz, was directly measured for 90 nm node NMOSFETs (65 nm physical gate length). The NFminwas located at the peakfTof 152 GHz, coinciding with the peak transconductance (gm). On the basis of these measurements, a self‐consistent model of the DC I‐V, S‐parameters, and NFminresults was developed, including the changes after hot‐carrier stress. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 604–607, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22209
UWB bandpass filter with wide stopband using open stubs
Authors: Yang Ru‐Yuan , Hung Cheng‐Yuan , Su Yan‐Kuin , Weng Min‐Hang 
Published: January 2007

AbstractIn this paper, a compact pseudo‐interdigital ultra‐wideband filter using several open stubs to improve the stopband is designed and implemented on FR4 substrate. This filter at center frequency f0 of 4 GHz has presented almost very good measured characteristics, including the bandwidth of 3–5.1 GHz (3‐dB fractional bandwidth of 52%), low insertion loss of −0.6 ± 0.4 dB, sharp rejection due to two transmission zeros in the passband edge created by inter‐stage coupling, and wide stopband rejection greater than 15 dB from 5.3–9 GHz. Experimental results of the fabricated filter show a good agreement with the predict results. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 573–575, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22212
Wideband omnidirectional L‐shaped monopole antenna for a wireless USB dongle
Authors: Su Saou‐Wen , Chen Austin , Liu Yung‐Tao 
Published: January 2007

AbstractA new omnidirectional monopole antenna well suited to application in a wireless universal serial bus dongle for wideband operation is presented. The antenna is an L‐shaped metal‐plate monopole antenna consisting of a rectangular monopole element and a matching portion. The antenna is suitable to be mounted at the top region of a host dongle as a concealed antenna and can provide a very wide operating bandwidth of larger than 6.8 GHz (∼3.4–10.2 GHz). In addition, omnidirectional radiation is obtained for frequencies across the operating bandwidth. Effects of the system ground‐plane length on the antenna's impedance and radiation characteristics are also analyzed. Details of the proposed antenna are described, and a prototype of the design example is constructed and studied. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 625–628, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22217