bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dietary intake and depressive symptoms: A systematic review of observational studies
Authors: Murakami Kentaro , Sasaki Satoshi 
Published: December 2009

AbstractThe importance of research into the possible role of dietary intake in depressive symptoms is emphasized by the fact that diet is modifiable. We systematically reviewed observational studies investigating the association between dietary intake and depressive symptoms published in English as of December 2008. Using the PubMed database, 34 publications (23 cross‐sectional, 10 prospective cohort, and 1 case‐control studies) were identified. The number of subjects (n=80–27 111), age of subjects (15–97 years), dietary assessment method (dietary record, diet history interview, and validated and non‐validated dietary questionnaire), depressive symptom assessment (discharge diagnosis, established scale, and self‐reported information) varied among studies. Dietary variables most frequently investigated included long chain n‐3 PUFA, fish, folate, and other B vitamins. Most studies found no association between dietary variables and depressive symptoms. However, most studies included at least one important methodological limitation, such as no inference for causality, unreliable or rough assessment of diet or depressive symptoms, inadequate treatment of potential confounding factors, and ignorance of the possible mediating or confounding influence of other dietary variables. Further evidence from well‐designed observational studies is required to confirm or refute the association between dietary intake and depressive symptoms in free‐living settings.
Increased plasma n‐3 polyunsaturated fatty acid is associated with improved insulin sensitivity in type 2 diabetes in China
Authors: Huang Tao , Wahlqvist Mark L. , Xu Tongcheng , Xu Amei , Zhang Aizhen , Li Duo 
Published: December 2009

AbstractIncreased tissue n‐3 polyunsaturated fatty acid (PUFA) is associated with improved insulin sensitivity in type 2 diabetes. However, this relationship among Chinese is not clear. To investigate the relationship between plasma phospholipids (PL) fatty acid composition and insulin resistance (IR) in type 2 diabetes mellitus, 186 type 2 diabetes and 180 healthy subjects were studied in this case‐control study. In the sex, age and BMI controlled partial correlation, homeostasis model assessment (HOMA)‐IR and blood glucose was significantly negatively correlated with plasma PL n‐3 PUFA, 20:5n‐3 and ratio of n‐3:n‐6 (p<0.01), and positively correlated with n‐6 PUFA (p<0.001) and saturated fatty acid (p<0.05) in the diabetes patients. PL 22:6n‐3 was also significantly negatively correlated with HOMA‐IR (p<0.01), but not with blood glucose. Fasting insulin was significantly negatively correlated with plasma PL n‐3 PUFA, 20:5n‐3, 22:6n‐3 and ratio of n‐3:n‐6 (p<0.01). The 18:3n‐3 was not associated with HOMA‐IR and fasting insulin. The results suggested that increased plasma PL n‐3 PUFA, 20:5n‐3, 22:6n‐3 and ratio of n‐3:n‐6 PUFA was associated with decreased HOMA‐IR in type 2 diabetes. Increased plasma PL n‐3 PUFA improves insulin sensitivity in type 2 diabetes.
Two novel extremely low‐profile slot‐coupled two‐element patch antennas for UHF RFID of people
Authors: Švanda Milan , Polívka Milan 
Published: December 2009

AbstractNovel type of extremely low‐profile low‐dielectric constant substrate antenna, based on two‐element slot‐coupled shorted‐patch structure for UHF RFID applications has been developed. We use two different methods for tuning the complex input impedance—dipole excitation and direct excitation with tuning slots. Both credit card‐sized antennas exhibit the antenna efficiency better than ∼50%, irrespective of whether they are placed in free space or enclosed to either metallic or human body. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 249–252, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24894
LTCC‐based vertical via interconnects for RF MEMS packaging
Authors: Bang Yong‐Seung , Kim Jung‐Mu , Kim Jong‐Man , Kim Yong‐Kweon , Jang Yun‐Ho 
Published: December 2009

AbstractThis article reports on a low temperature cofired ceramic (LTCC)‐based RF MEMS packaging and its electrical modeling using lumped elements and microstrip lines. An LTCC cap with vertical vias was flip‐chip bonded with a glass substrate, where a coplanar waveguide (CPW) formed to measure the RF characteristics of packaging structure. We measured return loss (S11) and insertion loss (S21) of the fabricated packaging structure in a frequency range of 1 to 30 GHz. The parameters of two different equivalent circuits using lumped elements and physical microstrip lines were extracted from the measured results. The mean absolute errors (MAEs) were calculated to show the agreement between measured properties and electrical equivalent circuits. The calculated MAEs were 0.591 dB (S11) and 0.146 dB (S21) for lumped elements, and 0.926 dB (S11) and 0.179 dB (S21) for microstrip lines, respectively. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 252–257, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24895
Medium power C‐band array amplifier featured ultra low residual phase noise
Authors: Shtin Nicolas A. , López Romero José Mauricio 
Published: December 2009

AbstractThis article deals with a design and performance evaluation of a medium power C‐band array amplifier based on SiGe hetero‐junction bipolar transistors (HBT). The proposed power amplifier (PA) contains four identical HBT stages coupled by the means of compact power splitting/summing microstrip networks. The designed PA exhibits a very low phase noise level of −165 dBc/Hz at 1 kHz offset frequency, and it is distinguished by a high output power havingP1dB= +26 dBm and high power added efficiency approaching to 40%. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 292–295, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24896
Theoretical and experimental study on the fiber optic displacement sensor with two receiving fibers
Authors: Harun Sulaiman Wadi , Yang H. Z. , Yasin Moh , Ahmad H. 
Published: December 2009

AbstractThe intensity‐modulation‐based displacement sensor with two receiving fibers is theoretically and experimentally studied. Themathematical model of the proposed sensor is developed and the simulated responses are obtained to be in a good agreement with the experimental results. Compared with the conventional sensor with only one receiving fiber, the proposed sensor has a better linearity range because it has a larger area to receive the reflected light from the target. However, the sensitivity of both sensors is almost similar. Theproposed sensor has the maximum linearity ranges of 2.5 μm and 0.9 μm at the back and front slopes, respectively. The linearity ranges are improved by about 44% compared with the conventional sensor. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 373–375, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24900
A miniature frequency synthesizer module in W‐band
Authors: Ruimin Mingzhou Zhan , Lin Xu Weigan 
Published: December 2009

AbstractThis article is dedicated to the research on a miniaturized W‐band multiplied phase‐locked frequency synthesizer. This module adopts microwave frequency synthesizer and multiplying scheme. It is composed of a C‐band phase‐locked loop (PLL) frequency synthesizer and a millimeter‐wave (mm‐wave) ×4 × 3 multiplier chain. Measurements show that the W‐band multiplied frequency synthesizer module covers 92.4–95.6 GHz with a minimal step of 40 MHz, low phase noise (better than −75 dBc/Hz@10 kHz in the whole output frequency band), sufficient power (−5.7 dBm to −3.6 dBm), and only a very compact size of 9.8 cm long ×9.5 cm wide ×2.7 cm high. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 412–416, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24915
Class F against tuned load configuration in Doherty power amplifiers
Authors: Colantonio P. , Giannini F. , Giofrè R. , Piazzon L. 
Published: December 2009

AbstractThe experimental results and comparison of two Doherty Power Amplifiers (DPAs) with the Main device designed respectively in a Tuned Load and a Class F configuration are presented. Both DPAs are designed by using GaN HEMT (1 mm of gate periphery) as active device to operate at 2.14 GHz, assuring an almost constant efficiency over the usual Output Back Off range of 6 dB. The experimental results demonstrate the benefit of the Class F solution in a DPA architecture. ©2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 450–452, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24918
A novel broadband VHF SiC MESFET class‐E high power amplifier
Authors: Chen Wenhua , Li Xiang , Wang Li , Feng Zhenghe , Xue Xing 
Published: December 2009

AbstractBased on a Silicon carbide (SiC) Metal‐Semiconductor Field Effects Transistor (MESFET), a broadband VHF SiC class‐E high power amplifier is implemented by using a π‐transform output load network. Experimental results show that drain efficiency greater than 60% is achieved over a frequency bandwidth of 51.4%, and the peak output power exceeds 34 W. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 272–276, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24922
High‐level integrated passive triplexer and quintplexer module in organic SOP technology
Authors: Lim Sung Phyo , Park Jae Yeong 
Published: December 2009

AbstractIn this letter, fully embedded passive triplexer and quintplexer module into organic packaging substrate were presented for US CDMA handset applications. First, the passive triplexer was implemented by embedding all passive elements and circuits into multilayered organic packaging substrate. The passive triplexer circuit with eight passive elements was comprised of a diplexer, parallel resonator, and matching network. The size of the fabricated triplexer was 3 mm × 4 mm. The compact CDMA quintplexer module was fabricated by assembling the embedded passive triplexer with DCN and PCS duplexers on FR‐4 evaluation board. A fabricated quintplexer module exhibited an insertion loss of −2.2 dB/−2.9 dB at DCN Tx/Rx band, −3 dB/−2.7 dB at PCS Tx/Rx band, and −2.4 dB at GPS Rx band, respectively. In addition, the stop‐band attenuation is −40 dB/−44 dB at DCN Tx/Rx band, −55 dB/−45 dB at PCS Tx/Rx band, and −37 dB at GPS Rx band, respectively. Measured isolations in each Tx band are −62 dB/−58 dB at GPS/PCS of DCN band, −30 dB/−36 dB at DCN/PCS of GPS band, and −45 dB/−38 dB at DCN/GPS of PCS band. It is comparatively much higher than the matching circuit type quintplexer module, which indicates that the embedded triplexer is strongly applicable for improving the interferer blocking. The simulated performance characteristics were agreed with the simulated ones. ©2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 302–306, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24923
Retracted: Neural modeling for compact coplanar waveguide bandpass filter loaded split ring resonator
Authors: Liu Haiwen 
Published: December 2009

AbstractThe following article from Microwave and Optical Technology Letters, Volume 52, Issue 2, "Neural modeling for compact coplanar waveguide bandpass filter loaded split ring resonator" by Haiwen Liu, published online on December 8, 2009 in Wiley InterScience (www.interscience.wiley.com), has been retracted by the journal Editor‐in‐Chief, Kai Chang, and Wiley Periodicals, Inc. due to duplicate publication in the Journal of Infrared Millimeter and Terahertz Waves as a result of a communication misunderstanding.
Extinction ratio enhancement of self‐phase modulation based all‐optical regenerated signals in microstructured fibers
Authors: Zhang Xia , Ren Xiaomin , Zhao Naifeng , Wang Yamiao , Zheng Long , Huang Yongqing 
Published: December 2009

AbstractAll‐optical 2R regeneration of 10 Gb/s signals based on self‐phase modulation (SPM) in an 80‐m dispersion‐flattened microstructure fiber was demonstrated experimentally. The SPM‐induced broadened spectrum was generated in bandwidth of 70 nm with the flatness of −3 dB in the 1550 nm band. The output extinction ratio of the optimal regenerated signals was improved from 5.6 to about 12 dB. The regenerator also could greatly reduce the amplitude jitter. Furthermore, the single‐to‐multiple‐channel wavelength conversion characteristic of the regenerator was also discussed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 347–351, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24927
A switchable dual‐wavelength all‐fiber laser based on Panda‐type photosensitive polarization‐maintaining erbium‐doped fiber
Authors: Liu Peng , Yan Fengping , Wang Chuncan , Zhang Fan , Liu Chu 
Published: December 2009

AbstractA novel swithcable dual‐wavelength fiber laser using Panda‐type photosensitive polarization‐maintaining erbium‐doped fiber (PMEDF) is proposed and experimentally demonstrated. Based on the integration of good photosensitivity and gain characteristics, two matched uniform fiber Bragg gratings (FBGs) are directly written in the PMEDF as reflectors, an all‐fiber linear laser cavity with no splice in it is then obtained. Because of the high birefringence of the PMEDF, both of the FBGs show two reflection peaks corresponding to two orthogonal linear polarization modes. By adjusting the polarization controller (PC) in the cavity, three lasing outputs (single‐wavelength at 1554.552 nm, single‐wavelength at 1554.916 nm, and dual‐wavelength at both wavelengths) are observed, respectively. The alternate wavelength switching is flexible. Repeated testing results show that a high‐quality lasing output with side‐mode suppression ratio (SMSR) better than 50dB is achieved in all switching cases, the peak power of the laser either in single‐wavelength output or in dual‐wavelength output keeps stable with a small fluctuation less than 0.46 dB. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 386–389, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24928
Broadband transition between microstrip line and WR15 rectangular waveguide using low‐temperature cofired ceramic process
Authors: Lee Hong‐Yeol , Kim Young‐Goo , Jun Dong‐Suk , Choi Ik‐Guen , Park Kang‐Ho , Kim Jongdae 
Published: December 2009

AbstractA compact aperture coupled patch type microstrip‐to‐waveguide transition at V‐band is proposed and fabricated using low‐temperature cofired ceramic process. It uses the aperture coupled microstrip feed and the parasitic patch antenna radiating into the waveguide to improve the insertion loss and the bandwidth. As a result of experiments, low‐transmission loss and high‐return loss are realized at the design frequency of 60 GHz. For a 10‐dB return loss, a relative bandwidth of 13.8% is obtained for a fabricated back‐to‐back transition. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 433–435, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24941
Low loss reflection‐type phase shifter in Ku band
Authors: Lambard T. , Lafond O. , Himdi M. , Jeuland H. , Bolioli S. 
Published: December 2009

AbstractThis article presents a Ku band 360° analogue phase shifter optimized with a genetic algorithm. Varactor diodes are used as the tuning elements. The device presents 360° phase shift on 11% bandwidth. At 12 GHz, the insertion loss is found to be −2.2 ± 0.4 dB. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 283–285, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24944
Compact band‐notched ultra‐wideband antenna using defected ground structure
Authors: Li Li‐Xian , Zhong Shun‐Shi , Chen Min‐Hua 
Published: December 2009

AbstractA compact printed monopole ultra‐wideband (UWB) antenna with the band‐notched function is proposed. The antenna consists of a fan‐shaped metal patch and a trapeziform ground with a 50 Ω tapered coplanar waveguide (CPW) transmission line. By simply adjusting the length of the U‐shaped defected ground structure (DGS) in the ground plane, the band‐rejected filtering properties for the WLAN band is achieved. The proposed antenna is successfully simulated, designed, and measured, which shows an ultra‐wide matched impedance band from 3 to 15 GHz for VSWR ≤2 with a stop‐band of 5–6 GHz. The stable radiation patterns are also obtained. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 286–289, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24946
Critical coupling of a planar inverted F‐antenna using a ferrite sheet
Authors: Kim Hojeong , Choi Hyengcheul , Jeon Sinhyung , Kim Hyeongdong 
Published: December 2009

AbstractIn this letter, a novel method that can achieve critical coupling in a planar inverted F‐antenna of high height is proposed. Theproposed antenna can achieve critical coupling by attachment of a ferrite sheet without changing the size of the antenna or ground plane. A ferrite sheet is used to increase shunt inductance of the shorting pin loop. The proposed antenna is modeled by an equivalent circuit based on transmission line modeling. It has a very wide bandwidth of 16% for a voltage standing wave ratios <2. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 400–403, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24950
Simultaneous OTDM demultiplexing and data format conversion using A D flip‐flop
Authors: Xie Yiyuan , Zhang Jianguo , Xu Jiang 
Published: December 2009

AbstractA D flip‐flop is used to simultaneously demultiplex and data format conversion a single 10 Gbits/s channel from a 20 Gbits/s optical time‐division multiplexed data stream. Error‐free demultiplexing was achieved at very low optical signal power: −14 dBm (20 Gbits/s). The proposed demultiplexer has a simple structure and achieves return‐to‐zero (RZ) to nonreturn‐to‐zero (NRZ) data format conversion. The demultiplexer allows monolithic integration. The proposed demultiplexer will become an important interface technology in future for connecting the ultra‐fast optical time division multiplexing (OTDM) long haul networks to the wavelength division multiplexing (WDM) access and metro networks. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 398–400, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24955
J‐compensated PGSE: an improved NMR diffusion experiment with fewer phase distortions
Authors: Torres Allan M. , Zheng Gang , Price William S. 
Published: December 2009

AbstractPeak distortion caused by homonuclear 1H J‐coupling is a major problem in many spin‐echo‐based experiments such as pulsed gradient spin‐echo (PGSE) experiments. Although peak phase distortions can be lessened by the incorporation of anti‐phase purging sequences, the sensitivity is substantially decreased. Techniques for lessening the effect of homonuclear J‐coupling evolution in spin‐echo‐based experiments have been investigated. Two potentially useful candidates include a J‐compensated inversion sequence that is efficient over a wide range of J‐coupling values and a pulse sequence that refocuses homonuclear J‐evolution during the spin‐echo. The latter was found to work superbly on samples containing two spin (AX or AB) systems and still provided significant advantage over the standard method on samples containing more complicated spin systems. Implementation of this J‐refocusing technique into a PGSE‐type experiment (J‐PGSE) leads to dramatic improvement of spectra and easier data analysis. The J‐PGSE sequence should find applications in many diffusion studies where the PGSE‐type method is required and should be a viable alternative to PGSTE especially in dilute samples due to its enhanced sensitivity. Copyright © 2009 John Wiley & Sons, Ltd.
Genetic modification of pigs as organ donors for xenotransplantation
Authors: Klymiuk Nikolai , Aigner Bernhard , Brem Gottfried , Wolf Eckhard 
Published: December 2009

AbstractTransgenic pigs are promising donor organisms for xenotransplantation as they share many anatomical and physiological characteristics with humans. The most profound barrier to pig‐to‐primate xenotransplantation is the rejection of the grafted organ by a cascade of immune mechanisms commonly referred to as hyperacute rejection (HAR), acute humoral xenograft rejection (AHXR), immune cell‐mediated rejection, and chronic rejection. Various strategies for the genetic modification of pigs facilitate tailoring them to be donors for organ transplantation. Genetically modified pigs lacking alpha‐1,3‐Gal epitopes, the major xenoantigens triggering HAR of pig‐to‐primate xenografts, are considered to be the basis for further genetic modifications that can address other rejection mechanisms and incompatibilities between the porcine and primate blood coagulation systems. These modifications include expression of human complement regulatory proteins, CD39, endothelial protein C receptor, heme oxygenase 1, thrombomodulin, tissue factor pathway inhibitor as well as modulators of the cellular immune system such as human TNF alpha‐related apoptosis inducing ligand, HLA‐E/beta‐2‐microglobulin, and CTLA‐4Ig. In addition, transgenic strategies have been developed to reduce the potential risk of infections by endogenous porcine retroviruses. The protective efficacy of all these strategies is strictly dependent on a sufficiently high expression level of the respective factors with the required spatial distribution. This review provides an overview of the transgenic approaches that have been used to generate donor pigs for xenotransplantation, as well as their biological effects in in vitro tests and in preclinical transplantation studies. A future challenge will be to combine the most important and efficient genetic modifications in multi‐transgenic pigs for clinical xenotransplantation. Mol. Reprod. Dev. 77: 209–221, 2010. © 2009 Wiley‐Liss, Inc.
Analytical solution for the response of a flexible retaining structure with an elastic backfill
Authors: Jung Chulmin , Bobet Antonio , Fernández Gabriel 
Published: December 2009

AbstractAn extension of an existing analytical solution for the response of a flexible retaining wall subjected to seismic loading is presented. The solution is based on the assumption that the wall and the soil remain elastic and that there are no shear stresses at the wall–soil interface while the contact remains tied. In addition to the wall displacements due to bending, the wall can experience rigid‐body motions due to rotation and horizontal and vertical movements. The solution is verified by comparing its results with those of a finite element method. Results from the analytical solution together with those of the (FEM) are used to identify and quantify the relative importance of key parameters on the seismic response of a wall. The study shows that wall flexibility and horizontal rigid‐body motions of the wall and frequency content of the seismic input have a significant effect on the wall loads. The pressures behind a rigid wall decrease as the wall rotates about its base, whereas for a flexible wall, the soil pressures decrease as the friction between the backfill and the wall increases. The rigid‐body vertical movements of a wall have little impact on the dynamic pressures induced in the wall, except for a flexible wall where, when prevented, the dynamic loads may be reduced. Copyright © 2009 John Wiley & Sons, Ltd.