bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vertebral osteomyelitis with a rare etiology diagnosed by fine‐needle aspiration cytology
Authors: BN Nandeesh , Kini Usha , Alexander Betty 
Published: November 2009

AbstractInvasive fungal infections are rare in immunocompromised individuals, but are not uncommon in immunologically compromised patients. Bone involvement by these infections, though exceedingly rare, may occur due to direct extension of the infection from a neighboring organ or due to hematogenous dissemination in critically ill patients. Still rarer is the invasive aspergillosis involving either the vertebral body or the intervertebral disc with extension into the extradural space as an abscess. We report one such case of vertebral osteomyelitis due to Aspergillus diagnosed by FNAC in a well‐controlled diabetic patient who presented with nonspecific symptoms and in whom a clinical and radiological diagnosis of Pott's spine was considered. The present case stresses the importance of early cytologic diagnosis of vertebral Aspergillus osteomyelitis, which in conjunction with appropriate timely medical and surgical treatment, offers good recovery without much sequelae or threat to life. Diagn. Cytopathol. 2010. © 2009 Wiley‐Liss, Inc.
Highly Enantioselective Aza‐Baylis–Hillman‐Type Reaction of α,β‐Unsaturated Aldehydes with In Situ Generated N‐Boc‐ and N‐Cbz‐Imines
Authors: Číhalová Sylva , Remeš Marek , Císařová Ivana , Veselý Jan 
Published: November 2009

AbstractAn organocatalytic highly enantioselective aza‐Baylis–Hillman reaction of α,β‐unsaturated aldehydes with in situ generated N‐Boc‐ and N‐Cbz‐imines is presented. This novel process opens the pathway for the synthesis of β‐amino carbonyl compounds bearing an α‐alkylidene group under mild and simple conditions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Dispersion characteristics of LiTi‐Ferrite radome
Authors: Saxena Naveen Kumar , Kumar Nitendar , Pourush P. K. S. 
Published: November 2009

AbstractThe dispersion characteristics of a magnetically switchable LiTi‐Ferrite radome is presented. A thin layer of LiTi‐ferrite is used as superstrate or radome layer, which control the radiation, reception, and scattering from a printed antenna or array by applying a DC magnetic bias field in the plane of the ferrite, orthogonal to the RF magnetic field. In this analysis, absorbing and transmission power coefficients are calculated to obtain the power loss in radome layer and transmitted power, respectively. The absorbing power coefficient verifies the switching behavior of radome for certain range of applied external magnetic field (Ho), which depends on the resonance width parameter (ΔH) of ferrite material. By properly choosing the bias field, quasi TEM wave propagation in the ferrite layer can be made to be zero or negative over a certain frequency range, results in a switching behavior in the ferrite layer. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 52–54, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24828
Inductive matching technique for a feed‐forward noise‐canceling CMOS low‐noise amplifier
Authors: Chiou Hwann‐Kaeo , Li Chin‐Lung , Liao Hsien‐Yuan , Lee Sung‐Huang 
Published: November 2009

AbstractAn inductive matching technique is proposed for a noise‐canceling CMOS low‐noise amplifier (LNA). This composite LNA consists of a main amplifier and a feed‐forward amplifier. The feed‐forward amplifier provides a noise canceling path to eliminate the noise at the output of the main amplifier. An inductor is used to tune out the remaining capacitive impedance at the output common node of two amplifiers, which provides the proper phase difference to cancel the overall noise voltage. For an optimum noise canceling bias, the measured noise figure is 2.5 dB, which is an improvement of 0.6 dB. ©2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 72–75, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24838
Microwave signal generation based on two single‐longitudinal‐mode erbium‐doped fiber lasers
Authors: Luo Jian‐Hua , Liu Bo , Zhang Hao , Yan Shao‐Lin , Ma Xiu‐Rong , Jia Cheng‐Lai 
Published: November 2009

AbstractA simple microwave signal source is proposed by connecting two single‐longitudinal‐mode erbium‐doped distributed Bragg reflector fiber lasers in series. For using same pump LD, mutual injection locking of two fiber lasers is achieved. The two single‐longitudinal‐mode lasers have 0.048 nm wavelength difference. By beating the two wavelengths at a photodetector, stable microwave signal at 6.17 GHz is achieved at room temperature. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 177–179, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24840
A tunable photonic microwave notch filter using a multiple wavelength optical source
Authors: Choi Yong‐Kyu , Jeon Sie‐Wook , Kim Youngbok , Keun Oh Choong , Park Chang‐Soo 
Published: November 2009

AbstractWe propose a tunable photonic microwave notch filter using a multi‐wavelength optical source. Two peak wavelengths are generated using a reflective semiconductor optical amplifier (RSOA) self‐injection, locked by two external fiber Bragg gratings (FBGs). The time delay required for the notch filter is obtained based on the wavelength‐dependent propagation velocity through the fiber. The tunable filter characteristic is obtained by changing the center wavelength of one of the gratings and its tunability is limited only by the gain profile of the RSOA and the tuning range of the grating. Based on the proposed structure, a two‐tap microwave notch filter with free spectral range tunable from 1.15 to 5.79 GHz is experimentally demonstrated. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 134–138, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24841
Stable operation of microwave photonic filters constructed with two cascaded Hi‐Bi fibers
Authors: Dong H. , Zhou J. Q. , Aditya S. , Gong Y. D. , Shum P. 
Published: November 2009

AbstractFor the microwave photonic filters constructed with two cascaded Hi‐Bi fibers, we demonstrate theoretically and experimentally a new technique that uses a dual‐ or tri‐wavelength spacing‐tunable laser source to greatly suppress the sensitivity of the filter response to environmental perturbations without the introduction of the phase‐induced intensity noise. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 207–212, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24844
A novel ultrawideband planar antenna with dual band‐notched performance
Authors: Zhang Meng , Zhou Xilang , Guo Jia , Yin Wenyan 
Published: November 2009

AbstractIn this article, a novel and compact ultrawideband (UWB) planar antenna is presented. This antenna consists of an annular patch and a 50 Ω microstrip feed line. The 3.5/5.5 GHz dual band‐notched characteristic gets achieved by etching a C‐shaped slot in the patch and complimentary split ring resonator (CSRR) structure in the ground. The measured results show that the proposed antenna can achieve the voltage standing wave ratio (VSWR) requirement of less than 2.0 in very UWB frequency range from 3.05 to 23.8 GHz with dual band‐rejection performance of 3.4 to 4.0 GHz and 4.92 to 6.0 GHz. Measured VSWR of the proposed antenna is in good agreement with the simulated result. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 90–92, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24856
A compact microstrip UWB BPF with nonuniformly short‐circuited CPW resonator
Authors: Chen H. , Zhang Y.‐X. 
Published: November 2009

AbstractA novel and compact ultra‐wideband bandpass filter using hybrid microstrip/coplanar waveguide is presented. The proposed filter consists of a single coplanar waveguide with nonuniformly short‐circuited resonator, which is broadside‐coupled to two microstrip open‐circuited stubs on the other side of a common substrate. The measured results show that the filter has a good performance, including a low insertion loss, a group delay variation of less than 0.25 ns within the passband, stop‐band of up to 18.8 GHz at high frequencies, and an out‐of‐band rejection level of below −16.5 dB from 11.4 to 18.8 GHz. ©2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 216–218, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.24859
Comments on electromagnetic scattering from inhomogeneous impedance periodic rough surfaces by transform technique
Authors: Yapar Ali , Akduman Ibrahim 
Published: November 2009

AbstractIn an recent article by Tezel (Microwave and Optical Technology Letters 51 (2009), 116–119) an electromagnetic scattering problem related to a periodic rough surface having an inhomogeneous standard impedance boundary condition is considered. The author proposes a solution method, which is based on the equivalent representation of the rough surface in terms of a planar one with higher order impedance boundary condition. We have already noticed that the mathematical formulation of the problem is completely incorrect and such a rough surface cannot be equivalently represented in terms of higher order impedance boundary condition. Therefore, the numerical results has no reliability, and they are fictitious. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 245, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24862
Dual band directive patch antenna based on the cut wire pairs structure
Authors: Huang Cheng , Zhao Zeyu , Luo Xiangang 
Published: November 2009

AbstractIn this letter, a dual band directive patch antenna with meta‐superstrate is presented. This meta‐superstrate is composed of cut wire pairs with two different lengths, which can make this antenna work at two frequency bands. It is found that the variation of distance h between the meta‐superstrate and ground would affect the radiation performance at every frequency band. Based on the F‐P theory, we discuss this influence process and make tradeoff between the gain of the antenna at the first and second frequency. The patch antenna with meta‐superstrate is then fabricated, and the measured results show that the designed antenna works at f1 = 14.7 GHz and f2 = 15.3 GHz, where the gain of the antenna can be both improved by about 8 dB with the introduction of meta‐superstrate. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 160–163, 2010; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/mop.24875
3.1–10.6 GHz ultra‐wideband RF receiver in 0.18 μm CMOS technology
Authors: Chiou Hwann‐Kaeo , Chen Hsien‐Jui 
Published: November 2009

AbstractThis article presents an ultra‐wideband (UWB). RF receiver that includes a low noise amplifier (LNA) and a single‐balanced mixer (SBM). The LNA uses an RC shunt feedback technique for broadening the bandwidth. Besides, an inductor is used as an interstage match at the cascode LNA that efficiently improves the flatness of the cascode LNA. The RC shunt feedback is also applied to the gm stage of mixer for the input impedance match. The low‐pass IF load is used to improve the LO/IF isolation of the SBM. The measured results of the UWB RF receiver are a conversion gain of 17.5–19.5 dB, a double side‐band noise figure of 5.25–6.89 dB at 100 MHz IF frequency under an LO power of 2 dBm, a minimal 1‐dB compression point (P1dB) of −31 dBm, an input third order intercept point of −12 dBm, the isolations among all ports of better than −40 dB. The total power consumption is 29.1 mW. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 232–236, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24879
Demonstration and analysis of dual‐wavelength clock recovery based on stimulated brillouin scattering
Authors: Chen Ming , Jian Shui‐sheng 
Published: November 2009

AbstractDual‐wavelength clock recovery (CR) based on Stimulated Brillouin Scattering is realized. The maximum frequency spacing of two channels is theoretically analyzed and experimentally demonstrated. The total wavelength span of the CR scheme is investigated to be about 3.37 nm in experiment. Multiwavelength CR can be implemented within the span. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 204–207, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24888
Ionic organic/inorganic materials. III. Stimuli responsive hybrid hydrogels based on oligo(N,N‐dimethylaminoethylmethacrylate) and chloroalkyl‐functionalized siloxanes
Authors: Dragan Ecaterina Stela , Cazacu Maria , Nistor Alexandra 
Published: November 2009

AbstractIonic organic/siloxane networks containing quaternary ammonium salt (QAS) sequences in the cross‐linking bridges were obtained by the Menshutkin reaction of oligo(N,N‐dimethylaminoethylmethacrylate) (ODMAEM) with a telechelic chloroalkylated siloxane (CAS), such as 1,3‐bis‐(chloromethyl)‐1,1,3,3‐tetramethyldisiloxane, 1,3‐bis‐(chloropropyl)‐1,1,3,3‐tetramethyldisiloxane, and α,ω‐bis(chloromethyl) oligodimethylsiloxane. The resulted structures were investigated by Fourier transform infrared spectroscopy emphasizing the presence of both organic and siloxane moieties. The thermogravimetric analysis under inert atmosphere of the networks, besides the thermal stability, gave also information on the composition of hybrid hydrogels. The morphology of the lyophilized networks was evidenced by environmental scanning electron microscopy, as a function of CAS structure and CAS: ODMAEM feed molar ratio. The swelling response of the ionic networks in water as a function of pH and counterion nature and concentration as well as the water vapors sorption capacity in dynamic regime were evaluated. The properties of the ionic hybrid hydrogels were correlated with the reactants feed molar ratio and concentration of the reaction mixture, CAS type, and the presence of a catalyst. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2009
Visible light‐induced living surface grafting polymerization for the potential biological applications
Authors: Bai Huadong , Huang Zhenhua , Yang Wantai 
Published: November 2009

AbstractA novel visible light‐induced living surface grafting polymerization was developed by a strategy in which isopropyl thioxanthone (ITX) was first photoreduced under UV light and sequentially coupled onto the surface of polymeric substrates, and the produced isopropyl thioxanthone‐semipinacol (ITXSP) “dormant” groups were subsequently reactivated under visible light to initiate a surface grafting polymerization. By using glycidyl methacrylate (GMA) and low‐density polyethylene (LDPE) films as models, a “living” surface grafting polymerization initiated by ITXSP under visible light at room temperature was observed. Both the surface grafting chain length versus grafting conversion of monomer and the grafting polymerization rate versus monomer concentration demonstrated a linear dependence, which is in accord with the known characteristics of living polymerization. The livingness rendered it possible to accurately control the thickness of the grafted layer by simply altering the irradiation time. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Phys, 2009
Synthesis and characterization of fluid 1,3‐benzoxazine monomers and their thermally activated curing
Authors: Kiskan Baris , Koz Banu , Yagci Yusuf 
Published: November 2009

AbstractNovel mono‐ and difunctional aliphatic oxyalcohol‐based benzoxazines have been synthesized and characterized in detail. Molecular structures of the monomers were investigated by spectral analysis. The obtained benzoxazine monomers exhibit fluidic behavior, which makes them particularly useful for many applications compared to other traditional benzoxazines. Differential scanning calorimetry was used to monitor the thermal crosslinking behavior of synthesized monomers. Mono‐ and bifunctional benzoxazine monomers exhibited low curing exhothermic peak with the onset around 173 and 180 °C, respectively. Relatively, low ring‐opening polymerization temperature was due to the hydroxyl groups present in the structure of the monomers. The hydrogen bonding of hydroxyl groups may cause alignment of the monomers in the liquid state. Thermal stabilty of the polybenzoxazines was studied by thermogravimetric analysis. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2009
De novo backbone scaffolds for protein design
Authors: MacDonald James T. , Maksimiak Katarzyna , Sadowski Michael I. , Taylor William R. 
Published: November 2009

AbstractIn recent years, there have been significant advances in the field of computational protein design including the successful computational design of enzymes based on backbone scaffolds from experimentally solved structures. It is likely that large‐scale sampling of protein backbone conformations will become necessary as further progress is made on more complicated systems. Removing the constraint of having to use scaffolds based on known protein backbones is a potential method of solving the problem. With this application in mind, we describe a method to systematically construct a large number of de novo backbone structures from idealized topological forms in a top–down hierarchical approach. The structural properties of these novel backbone scaffolds were analyzed and compared with a set of high‐resolution experimental structures from the protein data bank (PDB). It was found that the Ramachandran plot distribution and relative γ‐ and β‐turn frequencies were similar to those found in the PDB. The de novo scaffolds were sequence designed with RosettaDesign, and the energy distributions and amino acid compositions were comparable with the results for redesigned experimentally solved backbones. Proteins 2010. © 2009 Wiley‐Liss, Inc.
Black‐box position and attitude tracking for underwater vehicles by second‐order sliding‐mode technique
Authors: Bartolini Giorgio , Pisano Alessandro 
Published: November 2009

AbstractIn this work we address the tracking control problems for autonomous underwater vehicles (AUVs). The proposed solution is based on the variable structure systems (VSS) theory and, in particular, on the second‐order sliding‐mode (2‐SM) methodology. The tuning of the controller is carried out via black‐box approach, dispensing with the knowledge of the actual AUV parameters, by simply progressively increasing a single gain parameter. The presented stability analysis includes explicitly the unmodelled actuator dynamics and the presence of external uncertain disturbances. The good performance of the proposed scheme is verified by means of simulations on a 6‐DOF AUV. Copyright © 2009 John Wiley & Sons, Ltd.
Colposcopy audit for improving quality of service in areas with a high incidence of cervical cancer
Authors: Manopunya Manatsawee , Suprasert Prapaporn , Srisomboon Jatupol , Kietpeerakool Chumnan 
Published: November 2009

AbstractObjectiveTo audit routine colposcopy performance using 8 standard requirements of the National Health Service Cervical Screening Programme (NHSCSP).MethodsRecords of women who underwent colposcopy for abnormal cervical cytology between January and December 2008 at Chiang Mai University Hospital, Thailand, were reviewed.ResultsThe standard requirements were not achieved in 2 practices: (1) the proportion of women who had recordings of visibility of the transformation zone (96.6%) did not achieve the NHSCSP requirement of 100%; and (2) the rate of excisional biopsy (87.8%) was lower than the 95% minimum required.ConclusionColposcopic performance at Chiang Mai University Hospital was generally favorable. However, re‐audit is necessary to ensure that unmet standards of performance are improved and achieved standards are maintained.
Use of prenatal corticosteroids for preterm birth in three Latin American countries
Authors: Riganti Alicia Aleman , Cafferata Maria Luisa , Althabe Fernando , Gibbons Luz , Segarra Jose Ortiz , Sandoval Xochitl , Belizán José M. 
Published: November 2009

AbstractObjectiveTo determine the prevalence of the use of prenatal corticosteroids in women who delivered prematurely in 3 Latin American counties and to evaluate the maternal characteristics associated with use.MethodsA multicenter, prospective, descriptive study was conducted in 4 hospitals in Ecuador, 5 in Uruguay, and 3 in El Salvador between 2004 and 2008. Women who had delivered between 24 and 34 weeks of pregnancy responded to a questionnaire assessing sociodemographic characteristics, obstetric history, prenatal care, women's attitudes to health services and knowledge of preterm risk factors, prenatal corticosteroid administration, and characteristics of the delivery and neonate. The association between the prenatal corticosteroid use and the study variables was evaluated through a logistic regression analysis based on a hierarchical model.ResultsA total of 1062 women who had a preterm birth were included in the study. Prenatal corticosteroid use was 34.8% (95% CI, 29.9%–39.9%) in Ecuador, 54.6% (95% CI, 49.6%–59.6%) in El Salvador, and 71.0% (95% CI, 65.3%–76.2%) in Uruguay. Hospital admission‐to‐delivery time was associated with the use of prenatal corticosteroids in all 3 countries.ConclusionThe study revealed a varied pattern of use of prenatal corticosteroids across the 3 countries, and a diversity of influencing factors.
Retracted: Metformin versus laparoscopic ovarian drilling in clomiphene‐ and insulin‐resistant women with polycystic ovary syndrome
Authors: Hamed Hossam O. , Hasan Asmaa F. , Ahmed Omyma G. , Ahmed Marwa A. 
Published: November 2009

AbstractObjectiveTo compare the hormonal‐metabolic profiles and reproductive outcomes in clomiphene‐resistant patients with polycystic ovary syndrome and insulin resistance between women receiving metformin and those undergoing laparoscopic ovarian drilling.MethodsA total of 110 eligible participants were randomly allocated to diagnostic laparoscopy plus metformin therapy (group 1, n = 55) or laparoscopic ovarian drilling (group 2, n = 55). The t test was used for mean comparisons of hormonal‐metabolic parameters and OGTT values before and after treatment. The χ2 test was used for comparisons of ovulation, pregnancy, and abortion rates.ResultsGroups 1 and 2 showed a significant decline in testosterone, insulin‐like growth factor‐1 (P < 0.001 vs P < 0.001), and luteinizing hormone (P < 0.05 vs P < 0.001), while the glucose to insulin ratio was significantly increased (P < 0.001 vs P < 0.05) compared with baseline. Group 2 patients had more regular cycles and higher rates of ovulation and pregnancy compared with group 1: 76.4% [42/55] vs 58.2% [32/55], P < 0.04; 50.8% [131/258] vs 33.5% [94/281], P < 0.001; and 38.2% [21/55] vs 20.0% [11/55], P < 0.03, respectively. The difference in the early abortion rate between the groups was not statistically significant.ConclusionAlthough metformin results in a better attenuation of insulin resistance, laparoscopic ovarian drilling is associated with higher rates of ovulation and pregnancy.