bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cognitive dysfunctions and pathological gambling in patients with Parkinson's disease
Authors: Santangelo Gabriella , Vitale Carmine , Trojano Luigi , Verde Francesca , Grossi Dario , Barone Paolo 
Published: February 2009

AbstractThe purpose of this study was to investigate the neuropsychological correlates of pathological gambling (PG) in Parkinson's disease (PD). Fifteen patients with PD affected by PG (identified based on DSM‐IV criteria; PD+PG) without clinically evident dementia were compared with 15 nondemented patients with PD not affected by PG (PD−PG). Two groups of patients with PD were matched for age, length of education, and gender. Clinical and neuropsychiatric features were assessed; several cognitive domains, mainly related to executive functions, were explored by means of standardized neuropsychological tasks. PD+PG and PD−PG did not differ on clinical and neuropsychiatric aspects. PD+PG patients performed significantly worse than PD−PG patients on cognitive tasks that evaluated visuo‐spatial long‐term memory and several frontal lobe functions. After Bonferroni correction, differences remained significant on the Frontal Assessment Battery (FAB) (P = 0.001), on phonological fluency task (P = 0.003), and on the Trail Making Test, part B minus part A (P = 0.002). Logistic regression analysis demonstrated that low scores on the FAB were the only independent predictor of PG (odds ratio, 27.9; 95% CI: 2.82–277.95, P = 0.004). The results indicate an association between PG and frontal lobe dysfunctions in nondemented patients with PD. Low scores on the FAB indicate patients with PD at high risk for PG. © 2009 Movement Disorder Society
Numerical simulation of particle trajectory and atmospheric dispersion of airborne releases
Authors: Shoaib Raza S. , Avila Ruben 
Published: February 2009

AbstractNumerical simulation of particle trajectory and atmospheric dispersion has been performed for an airborne accidental release from a nuclear power plant site. A Long‐range Particle transport and Dispersion Model (LPDM) based on a Lagrangian approach is developed and tested in this work. The Lagrangian transport/dispersion model is directly coupled with an atmospheric prediction model, RAMS (Regional Atmospheric Modeling System), to provide necessary meteorological fields in a three‐dimensional domain. An advantage of this direct coupling is that the meteorological data generated by RAMS can be used directly for trajectory calculations without storage, thus reducing the CPU time consumed in the data storage and retrieval. This effort was done to be able to use this directly coupled modelling system for real‐time predictions in case of an accidental release from a potential site.The simulated Lagrangian trajectories were compared with those obtained using observed hourly weather data obtained from an on‐site meteorological tower. The results indicated that this one‐way coupling between LPDM‐RAMS provided almost identical trajectories when compared with those obtained using LPDM alone driven by hourly observed wind data. The comparison demonstrated the reliability of the RAMS meteorological predictions for the site under consideration. The comparison also indicated that LPDM (run in a stand alone mode), with hourly‐observed wind data, could also be used for trajectory calculations over flat terrain.The model was developed on a parallel processing computer (SGI workstation, ORIGIN 2000 computer with eight processors) for use in real‐time forecast mode. The computational time was about one‐third of the simulation time, while using four processors. The model options need to be explored to reduce the computational time further and test its performance for real‐time atmospheric dispersion applications. Copyright © 2009 Royal Meteorological Society
Spontaneous cecum perforation following rectus abdominis free flap transfer for isolated lower limb trauma
Authors: Stevens Roger J. G. , Moss Anthony L. H. 
Published: February 2009

AbstractA case of a 32‐year‐old motorcyclist, who sustained an open comminuted fracture of the left tibia and subsequently developed spontaneous cecal perforation following successful fixation of the fracture and reconstruction of the soft tissue defect with a rectus abdominis free flap, is reported. Although benign cecal perforation has been described in patients with thermal burns and blunt trauma of the abdomen or pelvis, our association has not been reported previously in the medical literature. It is important to recognize cecal perforation early as it is associated with a high mortality from peritonitis and septicaemia. © 2009 Wiley‐Liss, Inc. Microsurgery, 2009.
Metabolic response of soy pinitol on lipid‐lowering, antioxidant and hepatoprotective action in hamsters fed‐high fat and high cholesterol diet
Authors: Choi Myung‐Sook , Lee Mi‐Kyung , Jung Un Ju , Kim Hye‐Jin , Do Geoyng‐Min , Park Yong Bok , Jeon Seon‐Min 
Published: February 2009

AbstractThis study was performed to investigate the lipid‐lowering, antioxidant, and hepato‐protective effects of pinitol in dose‐dependent manners in hamsters fed‐high fat and high cholesterol (HFHC) diet. Pinitol supplementation (0.05%, P‐I and 0.1% pinitol, P‐II) with an HFHC diet (10% coconut oil plus 0.2% cholesterol) for 10 wks significantly lowered the white adipose tissue weights, hepatic lipid droplets, plasma glucose, total‐cholesterol, nonHDL‐cholesterol, total‐cholesterol/HDL‐cholesterol ratio, and hepatic lipid levels. Whereas it significantly increased the brown adipose tissue weight, plasma HDL‐cholesterol, apolipoprotein A‐I (apo A‐I) concentrations, paraoxonase (PON) activity, and/or mRNA expression, compared to the HFHC control group. Plasma insulin and adiponectin levels were significantly lower and higher, respectively, in both P‐I and P‐II groups than the HFHC control group. Dietary pinitol significantly inhibited hepatic HMG‐CoA reductase, acyl‐CoA:cholesterol acyltransferase (ACAT), and cytochrome P4502E1 (CYP2E1) activities without altering their mRNA expressions compared to the control group. Pinitol significantly elevated the hepatic antioxidant enzyme activities, whereas it also significantly reduced the hepatic lipid peroxide and H2O2production. Accordingly, these results indicate that both 0.05 and 0.1% pinitol supplementation may improve the lipid and antioxidant metabolism in HFHC diet‐fed hamsters. In particular, pinitol supplementation was very effective on the elevation of antiatherogenic factors, including plasma HDL‐cholesterol, apo A‐I, adiponectin, and PON.
Selective bio‐availability of phenolic acids from Scottish strawberries
Authors: Russell Wendy R. , Scobbie Lorraine , Labat Aurélie , Duthie Garry G. 
Published: February 2009

AbstractScottish strawberries were found to be a rich source of phenolic acids, namely benzoic (1287.95 ± 279.98 mg/kg) and cinnamic (1159.40 ± 233.96 mg/kg) acids, both free and attached to other plant components. Studies suggest a chemopreventative role for such compounds in several major clinical conditions, but the anticipated benefits are likely to be affected by their bio‐availability and metabolic fate. In this pilot study, strawberries (750 g) was consumed by four healthy human volunteers (32 ± 6 years). Only the benzoic acids were detected in the plasma. Of these, the major free (gentisic, protocatechuic and p‐hydroxybenzoic acid) and conjugated (syringic acid) benzoic acids were 26–27% recovered in the urine within 5 h. Cinnamic acids were completely undetected in plasma and only trace amounts were found in the urine. Since, the cinnamic acids escaped absorption early in the gastrointestinal tract, their release and/or metabolism is dependant on the host colonic microbiota. Results indicate that there is a high degree of selective absorption of strawberry phenolic acids into the systemic circulation. If selective absorption of phenolic acids is observed with consumption of other plant‐based foods, this is likely to have implications for the bioactive role of these compounds in chronic disease prevention.
Improving the accuracy of two‐ray model at 60 GHz for line‐of‐sight wireless desktop channel
Authors: Wei Fu , Jianguo Ma 
Published: February 2009

AbstractA site‐specific desktop propagation model is presented at 60 GHz. The desktop materials involved are wood, glass, and marble. The reflection coefficients versus Tx–Rx separation distance using vertical and horizontal polarization are investigated. Path loss data are then computed using improved two‐ray propagation model. Obtained values are compared with the measured data published in IEEE 802.15 TG3c and shown to have a more precise fitting than that predicted by conventional model. The regression model can be used as empirical values for 60 GHz desktop channels. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 907–910, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24192
More stabilized triple‐band antenna with a rolled radiating arm and a metallic rod for mobile applications
Authors: Zhang Xingyu , Zhao Anping 
Published: February 2009

AbstractIn this article, a compact design of a flexible planar inverted‐F antenna (PIFA) is proposed for triple‐band (GSM/DCS/PCS) mobile phone application. The main radiating element of the antenna, which generates the GSM and DCS resonant modes, is printed on a flexible printed circuit board (FPCB) and rolled in a form of cylinder. To improve the construction stability of the antenna, a metallic rod is inserted into the centre of the rolled antenna. The metallic rod acting as a parasitic element of the antenna also generates the PCS resonant mode. The antenna prototype was fabricated and measured. Good agreement between the measurement and simulation results is obtained. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 891–894, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24197
A novel method of detecting malaria using microwaves
Authors: Lonappan Anil , Thomas Vinu , Jacob Joe , Rajasekaran C. , Mathew K. T. 
Published: February 2009

AbstractMalaria is one of the most common infectious diseases and an enormous public health problem and claims an estimated 1–3 million lives every year and the majority of whom are young children. No vaccine is currently available for the treatment of malaria. This letter proposes a new method of detecting malaria based on the measurement of the dielectric properties of blood at the microwave frequencies. The measurements were made at the S‐band of microwave frequency using rectangular cavity perturbation technique with the samples of blood from healthy donors as well as from malaria patients. It is found that an appreciably change in the dielectric properties of patient samples with the normal healthy samples and this measurements were in good agreement with clinical results. This measurement is a new novel in vitro method of diagnosing malaria at its onset using microwaves, so that necessary precautions can be taken such as proper preventative drugs, which will continuously reduce the risk of infection. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 915–918, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24202
A novel asymmetric stepped‐impedance hairpin resonator and its filter application
Authors: Li Lingyu , Liu Haiwen 
Published: February 2009

AbstractIn this article, a newly asymmetric stepped‐impedance hairpin resonator (SIR), comprised of a meander line and a pair of symmetric parallel coupled lines, is presented to implement circuit reduction. Moreover, a compact filter is designed and constructed by using this novel asymmetric SIR and a slotted ground plan for spurious suppression. This proposed low‐pass filter was designed, fabricated, and measured. The experimental results of the filter have a good agreement with the simulated results. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 875–876, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24205
Small‐size uniplanar coupled‐fed PIFA for 2.4/5.2/5.8 GHz WLAN operation in the laptop computer
Authors: Liao Shih‐Jia , Wong Kin‐Lu , Chou Liang‐Che 
Published: February 2009

AbstractA coupled‐fed PIFA (printed inverted‐F antenna) printed on a small‐size FR4 substrate promising for 2.4/5.2/5.8 GHz WLAN (wireless local area network) operation in the laptop computer is presented. When mounted at the top edge of the system ground plane or supporting metal frame of the laptop display, the PIFA shows a height of 9 mm and a small width of 7 mm only. With a narrow width, it is promising for more internal antennas to be mounted along the top edge of the supporting metal frame of the laptop display. The PIFA also shows a uniplanar structure, allowing it easy to fabricate, and is fed using a T‐shaped coupling strip, which leads to successful excitation of two wide operating bands to cover WLAN operation in the 2.4 GHz band and 5.2/5.8 GHz band. Details of the proposed PIFA are studied, and experimental and simulation results are presented. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1023–1028, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24206
Design of compact dual‐band bandpass filter using short stub loaded resonator
Authors: Chen Fu‐Chang , Chu Qing‐Xin , Tu Zhi‐Hong 
Published: February 2009

AbstractCompact dual‐band bandpass filter using short stub loaded resonators is presented in this letter, the proposed resonator possesses the advantage that its center frequency of the even mode can be flexibly controlled, whereas that of the odd‐mode is fixed. A dual‐band filter using pseudo‐interdigital SSLR is implemented with three transmission zeros. Meandering SSLR is proposed to obtain independently controlled bandwidth at each band. Two experimental examples of filters have been designed and fabricated, good agreements are shown between the simulation and the measurement. The bandpass filters have very smaller area in comparison of previous works. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 959–963, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24209
Optimum design of highly linear and efficient GaN HEMT Doherty amplifier considering the soft turn‐on effects
Authors: Lee Yong‐Sub , Lee Mun‐Woo , Jeong Yoon‐Ha 
Published: February 2009

AbstractIn this article, we propose the optimum design of a highly linear and efficient Doherty power amplifier (DPA) considering the soft turn‐on effects of the GaN HEMT. To compensate for the soft turn‐on characteristic and obtain an extended high‐efficiency range, the DPA is designed with unequal drain biases. For experimental validations, the carrier and peaking cells are designed and implemented with the drain bias of 23 V and 33 V, respectively, using 25‐W GaN HEMTs at 2.6 GHz and then tested using a continuous wave and a one‐carrier WCDMA signal. The measured results show the superior performance for the proposed GaN HEMT DPA. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 956–959, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24210
Characteristics of lensed fiber collimator with larger gradient‐index lens diameter
Authors: Lin Yu‐Cheng 
Published: February 2009

AbstractA lensed fiber collimator using gradient‐index fiber (GIF) of 140 μm diameter spliced to single‐mode fiber (SMF) is reported. The complex beam parameter method and ABCD law are applied for theoretical analysis. Both numerical and experimental data are presented for optical characterization of the divergence angle and insertion loss in lateral and axial displacement of the device. The divergence angle of 2.7° is obtained for the wavelength of 1.31 and 1.55 μm at the GIF length of 425 μm. The variation of insertion loss because of lateral and axial displacement shows good agreement with theory. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1137–1139, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24211
A 5.2‐GHz low‐power VCO in 0.18‐μm CMOS process
Authors: Jang Sheng‐Lyang , Shen Kuan‐Chun , Liu Cheng‐Chen 
Published: February 2009

AbstractA 5.2 GHz, 0.43 V voltage‐controlled oscillator (VCO) is designed and implemented in a 0.18 μm CMOS 1P6M process. The designed circuit topology consists of two parallel LC resonators in series with the gates of negative differential resistance transistors. At the supply voltage of 0.43 V, the output phase noise of the VCO is −116d Bc/Hz at 1 MHz offset frequency from the carrier frequency of 5.3 GHz, and the figure of merit is −187.8dBc/Hz. Total VCO core power consumption is 1.83 mW. Tuning range is about 710 MHz, from 5.54 to 4.83 GHz, whereas the control voltage was tuned from 0 to 1.2 V. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1052–1055, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24216
The plastic optical fiber cantilever beam as a force sensor
Authors: Kulkarni Atul , Na Jeonggil , Kim Youngjin , Kim Taesung 
Published: February 2009

AbstractThis study reports use of inexpensive intensity‐based plastic optical fiber (POF) in the form of cantilever beam to monitor the force. The cantilever consists of POF surface bonded on the surface of metal beams viz. spring steel (SS) and mild steel (MS) and subjected to force. The performance of the force sensor is evaluated during macro‐bending caused because of the deflection of the beam by applied force. Experimentally obtained detector output of POF, which could be measured with negligible hysteresis is compared with finite element analysis in the range between 0.0098 and 19.613 N. The reproducibility of the sensor is observed in the limit of ±1%. The proposed sensor can replace stain gauge load cell to certain extent in some applications. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1020–1023, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24217
Size reduction of monopole antenna using complementary split loop resonator
Authors: Xiao Shaoqiu , Jiang Li , Ma Kaixue 
Published: February 2009

AbstractDeveloping low‐profile monopole antenna with compact size is very challenging in future RF front‐end systems. In this article, by embedding a complementary split loop resonator into a shorted square disc, we developed a square disc‐loaded monopole antenna with compact size. The volume of the proposed antenna is λ0/16×λ0/16×λ0/20, where λ0 is the wavelength in free space. The radiation pattern of the antenna is similar to that of a short monopole. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 930–932, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24226
Aperture‐coupled circularly polarized F‐slot microstrip antenna
Authors: Yeh Yong , Nasimuddin  , Chen Z. N. , Alphones A. 
Published: February 2009

AbstractA compact, aperture‐coupled, circularly polarized F‐slot microstrip antenna is proposed. The F‐slot is embedded in the square microstrip patch and fed using an aperture‐coupled feeding structure. The proposed antenna has a 4.87% (2.40–2.52 GHz) 3 dB AR (axial ratio) bandwidth with a 14.4% 10 dB return loss bandwidth. The gain within the usable bandwidth remains relatively constant at 6.0 dBic with a ±0.5 dB variation and a peak gain is 6.2 dBic at 2.42 GHz. The antenna ground plane size and foam substrate thickness represent about 53.3 and 7% of its wavelength at the operating frequency of 2.46 GHz, respectively. The 3 dB AR beamwidth is >90°. The patch size of the proposed antenna is reduced by 22.7% compared with a conventional square patch antenna. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1100–1104, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24230
Design of microstrip filter based on slow‐wave open‐loop resonator
Authors: Zhang Xiao‐Chuan , Xu Jun , Yu Zhi‐Yuan , Dong Yu‐Liang 
Published: February 2009

AbstractA microstrip bandpass filter implemented with slow‐wave open‐loop resonators is described in this article. The slow‐wave open‐loop resonators make the filter compact and allow the implementation of positive and negative inter‐resonator couplings. Implementation of the positive and negative couplings is used to introduce a pair of finite frequency transmission‐zeros in the filter response. The two zeros are designed to be close to the passband, thus improving the selectivity of the filter. As an example, a fourth‐order cross‐coupled filter is fabricated. The experimental results are demonstrated and discussed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1057–1060, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24232
A compact ultra‐wideband band‐pass filter with defected ground structure
Authors: Chen Peng , Wei Feng , Shi Xiaowei , Huang Qiulin 
Published: February 2009

AbstractIn this article, a compact ultra‐wideband (UWB) band‐pass filter (BPF) with improved upper‐stopband is presented. In this design, a novel multiple‐mode resonator (MMR) with two symmetrical loading stubs and three dumbbell‐shaped defected ground structures (DGS) on the back of the filter improve the harmonic‐suppression characteristic of conventional BPF. Combining these two structures, a new UWB BPF is fabricated and measured. Measured results show that the proposed BPF has wide bandwidth from 3.0 to 10.7 GHz, and the insertion loss of the BPF is less than 1.0 dB in this band. A wide stop‐band bandwidth with 20 dB attenuation from 12 GHz up to 20 GHz is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 979–981, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24234
Development and measurement of 10 GHz oscillators with ultra‐low phase noise
Authors: Andrade L. A. , Aguiar O. D. , Mosso M. M. , Santos B. P. , Podcameni A. 
Published: February 2009

AbstractThis work describes the development of 10‐GHz feedback oscillators with ultra‐low phase noise. Measurement procedures involving injection locking, composition with synchronized sources and vibrational isolation are described. The application is for gravitational waves detectors. The phase‐noise performance obtained was −100 dBc/Hz at 3 kHz, which is still 45 dB worse than the goal performance. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1120–1126, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24239
Ultra‐wideband square slot antenna with a novel diamond open‐ended microstrip feed
Authors: Naser‐Moghadasi Mohammad , Koohestani Mohsen , Golpour Mohsen , Virdee Bal S. 
Published: February 2009

AbstractA novel ultra‐wideband microstrip patch antenna is presented. The proposed antenna exhibits an impedance bandwidth of 127% over an ultra‐wideband frequency range from 2.9 to 13 GHz, which makes it an excellent candidate for UWB applications. Simulated results are compared with the fabricated antenna measured performance, which show good agreement. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1075–1080, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24242
A radio‐over‐fiber system with photonics generated OFDM signals by using directly modulated laser
Authors: Chen L. , Lu J. , He J. , Dong Z. , Wen S. 
Published: February 2009

AbstractWe have experimentally demonstrated a radio‐over‐fiber system transmitting 2.5 Gbt/s orthogonal frequency division multiplexing (OFDM) signals carried by 40 GHz millimetre ‐wave. The 40 GHz optical millimeter wave signals were generated by a directed modulation laser driven by the 2.5 Gb/s electrical OFDM signals carried by 20 GHz RF signals. The power penalty is less than 1 dB power penalty at bit error rate of 10−5 after transmission over 20 km standard single mode fiber. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 971–973, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24248