bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ultra‐wideband slot antenna with band‐notch characteristics for wireless USB dongle applications
Authors: Krishna Deepti Das , Gopikrishna M. , Aanandan C. K. , Mohanan P. , Vasudevan K. 
Published: March 2009

AbstractA compact ultra‐wideband (UWB) printed slot antenna is described, suitable for integration with the printed circuit board (PCB) of a wireless, universal, serial‐bus dongle. The design comprises of a near‐rectangular slot fed by a coplanar waveguide (CPW) printed on a PCB of size 20 × 30 mm2. It has a large bandwidth covering the 3.1–10.6 GHz UWB band, with omnidirectional radiation patterns. Further, a notched band centered at 5.45 GHz wireless local area network bands is obtained within the wide bandwidth by inserting a narrow slot inside the tuning stub. Details of the antenna design are described, and the experimental results of the constructed prototype are presented. The time domain studies on the antenna shows a linear phase response throughout the band except at the notched frequency. The transient analysis of the antenna indicates very little pulse distortion confirming its suitability for high speed wireless connectivity. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1500–1504, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24385
A modified generalized Chebyshev low‐pass filter with wide stopband
Authors: Kim Inseon , Kim Kwisoo , Lim Jongsik , Ahn Dal 
Published: March 2009

AbstractWe developed a modified generalized Chebyshev (MGC) rational function and synthesized a low‐pass filter (LPF) to implement it. The conventional generalized Chebyshev (GC) filter and proposed MGC filter have an equal ripple in passband. However, in stopband, the GC filter has only one transmission zero (or attenuation pole) at a finite frequency (f0), whereas the MGC filter has transmission zeros at two finite frequencies (f01and f02). The second transmission zero at f02can suppress harmonics (or spurious responses). We designed and fabricated a low‐pass filter according to the proposed theory. The stopband of the MGC filter was 4.7 times wider than that of the GC filter. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1428–1431, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24389
Compact LTCC band pass filter using high‐Q bondwire inductor for RF system‐in‐package applications
Authors: Jang Jae‐Won , Byun Jindo , Lee Hai‐Young 
Published: March 2009

AbstractA low‐temperature cofired ceramics(LTCC)‐embedded bandpass filter (BPF) using a high quality (Q) factor (130) bondwire inductor is proposed for radio frequency (RF) system‐in‐package (SiP) applications. The usage of high‐Q bondwire inductors significantly improves the passband insertion loss (1.35 dB) compared with that (2.0 dB) of embedded spiral inductors at 5.25 GHz and also greatly reduces the device size to 1.000 × 1.500 × 0.675 mm3. The insertion loss and the size of the proposed bondwire filter are the best compared with those of open literature filters. Excellent tolerances of 1.9% and 4.4% are, respectively, measured for the cutoff frequency and the insertion loss. We expect the proposed bondwire filter play an important role to improve the performance and to reduce the sizes of RF SiP circuits. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1424–1428, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24390
A compact microstrip dual‐wideband bandpass filter using ladder stub resonator
Authors: Weng Min‐Hang , Liauh Chihng‐Tsung , Wu Hung‐Wei , Vargas Steve Ramírez , Yang Ru‐Yuan 
Published: March 2009

AbstractIn this article, we present a novel compact dual wideband bandpass filter (BPF) by using a new structure of ladder stub resonator (LSR). The proposed LSR can produce attenuation poles to form low loss and dual‐wideband bandpass response. By tuning the structure parameters of LSR, the dual‐band characteristic can be controlled. The measured 3 dB fractional bandwidth (FBW) at first and second passbands are 41.5% and 25.7%, respectively. The experiment results of the fabricated filter agree well with the electromagnetic (EM) simulation. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1391–1393, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24392
Design of meander square‐ring resonator and its application in RF power divider
Authors: Zhang Fei 
Published: March 2009

AbstractFirst, this letter presents a novel meander square‐ring resonator (MSRR) and its stop‐band and slow‐wave effects are investigated. Served by the proposed MSRR, unwanted higher‐order 2nd and 3rd harmonics of power divider are effectively rejected benefiting from its stop‐band effect without any additional filter, and the physical length of quarter‐wavelength 70.7 ohm microstrip in power divider is halved utilizing its slow‐wave effect without decreasing the electrical length. Finally, power divider with area reduction by 42.6% is successfully obtained, compared with conventional design. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1602–1604, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24394
Traumatic brain injury in the United States: an epidemiologic overview
Authors: Summers Carl R. , Ivins Brian , Schwab Karen A. 
Published: March 2009

AbstractA basic description of severity and frequency is needed for planning healthcare delivery for any disease process. In the case of traumatic brain injury, severity is typically categorized into mild, moderate, and severe with information from a combination of clinical observation and self‐report methodologies. Recent US civilian epidemiological findings measuring the frequency of mortality and morbidity of traumatic brain injury are presented, including demographic and etiological breakdowns of the data. Falls, motor vehicle accidents, and being struck by objects are the major etiologies of traumatic brain injury. US civilian and Army hospitalization trends are discussed and compared. Features of traumatic brain injuries from Operation Iraqi Freedom and Operation Enduring Freedom are discussed. Mt Sinai J Med 76:105–110, 2009. © 2009 Mount Sinai School of Medicine
Mild traumatic brain injury
Authors: Bruns John J. , Jagoda Andy S. 
Published: March 2009

AbstractMild traumatic brain injury accounts for 1% to 2% of emergency department visits in the United States. Up to 15% of these patients will have an acute intracranial lesion identified on head computed tomography; less than 1% of mild traumatic brain injuries will require neurosurgical intervention. Clinical research over the past decade has focused on identifying the subgroup of patients with mild traumatic brain injury with acute traumatic lesions on computed tomography and specifically those at risk for harboring a potentially catastrophic lesion. This research has been used to generate evidence‐based guidelines to assist in clinical decision making. There is no evidence to support the use of plain film radiographs in the evaluation of patients with mild traumatic brain injury. The utility of brain‐specific biomarkers is rapidly evolving, and a growing body of evidence supports their potential role in determining the need for neuroimaging. Clinical predictors for identifying patients with abnormal computed tomography have been established and, if used, may have a significant positive impact on traumatic brain injury–related morbidity and healthcare utilization in the United States. Patients with negative computed tomography are at almost no risk of deteriorating; however, they should be counseled regarding postconcussive symptoms and should be given appropriate written instructions and referrals at discharge. Mt Sinai J Med 76:129–137, 2009. © 2009 Mount Sinai School of Medicine
Vibratory thresholds and mobility in older persons
Authors: Buchman Aron S. , Wilson Robert S. , Leurgans Sue , Bennett David A. 
Published: March 2009

AbstractWe tested the hypothesis that vibratory thresholds in the elderly are related to mobility. In all, 629 older persons without dementia underwent testing including 11 lower extremity performance measures and modified United Parkinson's Disease Rating Scale (UPDRS), summarized as composite mobility and global parkinsonian signs. Vibratory thresholds were measured at the ankle and toes bilaterally using the graduated Rydel–Seiffer tuning fork. In linear regression models adjusted for age, sex, and education, vibratory threshold was associated with composite mobility (estimate, 0.047, SE = 0.011, P < 0.001) and global parkinsonian signs score (estimate, −0.252, SE = 0.126, P = 0.047). These findings were primarily due to the association of vibratory threshold with gait and balance components of composite mobility and parkinsonian gait. These results were unchanged when we controlled for body mass index, physical activity, cognition, depression, vascular risk factors, vascular disease burden, joint pain, and falls. Vibratory thresholds are associated with mobility, supporting the link between peripheral sensory nerve function and mobility in the elderly. Muscle Nerve, 2009
Capacitated lot‐sizing and scheduling with parallel machines, back‐orders, and setup carry‐over
Authors: Quadt Daniel , Kuhn Heinrich 
Published: March 2009

AbstractWe address the capacitated lot‐sizing and scheduling problem with setup times, setup carry‐over, back‐orders, and parallel machines as it appears in a semiconductor assembly facility. The problem can be formulated as an extension of the capacitated lot‐sizing problem with linked lot‐sizes (CLSPL). We present a mixed integer (MIP) formulation of the problem and a new solution procedure. The solution procedure is based on a novel “aggregate model,” which uses integer instead of binary variables. The model is embedded in a period‐by‐period heuristic and is solved to optimality or near‐optimality in each iteration using standard procedures (CPLEX). A subsequent scheduling routine loads and sequences the products on the parallel machines. Six variants of the heuristic are presented and tested in an extensive computational study. © 2009 Wiley Periodicals, Inc. Naval Research Logistics 2009
Diffusion‐weighted MRI measurements on stroke patients reveal water‐exchange mechanisms in sub‐acute ischaemic lesions
Authors: Lätt J. , Nilsson M. , van Westen D. , Wirestam R. , Ståhlberg F. , Brockstedt S. 
Published: March 2009

AbstractThe aim of this study was to investigate the diffusion time dependence of signal‐versus‐b curves obtained from diffusion‐weighted magnetic resonance imaging (DW‐MRI) of sub‐acute ischaemic lesions in stroke patients. In this case series study, 16 patients with sub‐acute ischaemic stroke were examined with DW‐MRI using two different diffusion times (60 and 260 ms). Nine of these patients showed sufficiently large lesions without artefacts to merit further analysis. The signal‐versus‐b curves from the lesions were plotted and analysed using a two‐compartment model including compartmental exchange. To validate the model and to aid the interpretation of the estimated model parameters, Monte Carlo simulations were performed. In eight cases, the plotted signal‐versus‐b curves, obtained from the lesions, showed a signal–curve split‐up when data for the two diffusion times were compared, revealing effects of compartmental water exchange. For one of the patients, parametric maps were generated based on the extracted model parameters. These novel observations suggest that water exchange between different water pools is measurable and thus potentially useful for clinical assessment. The information can improve the understanding of the relationship between the DW‐MRI signal intensity and the microstructural properties of the lesions. Copyright © 2009 John Wiley & Sons, Ltd.
Algorithms by design: A new normalized time‐weighted residual methodology and design of a family of energy–momentum conserving algorithms for non‐linear structural dynamics
Authors: Masuri S. U. , Hoitink A. , Zhou X. , Tamma K. K. 
Published: March 2009

AbstractA new approach termed as the hybrid displacement–strain‐based normalized time‐weighted residual approach is presented to accurately model non‐linear structural dynamic problems. The focus here is restricted to all possible algorithmic designs within the class of linear multi‐step methods that fall under the umbrella of the generalized single solve single step linear dynamic framework originally developed via the classical time‐weighted residual approach involving a single solve within each time step as such designs are the most predominant in research and commercial software (Int. J. Numer. Meth. Engng 2004; 59:597–668; Int. J. Numer. Meth. Engng 2006; 66:1738–1790). However, traditional practices via classical time‐weighted residual approaches fail to preserve the underlying physics and stability and do not serve the purposes of extensions to non‐linear dynamic situations. In contrast, a new normalized time‐weighted residual approach is proposed that naturally enables such extensions leading to the design of a family of conserving time operators for unconstrained conservative dynamic systems without resorting to enforcing energy constraints as in past practices. Consequently, the algorithmic stability (in the sense of energy stability) via this approach for non‐linear dynamic problems is also preserved. For linear dynamic situations, it reverts to the classical paradigm. Only simple numerical illustrations are purposely presented to demonstrate the basic concepts. Copyright © 2009 John Wiley & Sons, Ltd.
PTEN genomic deletion is associated with p‐Akt and AR signalling in poorer outcome, hormone refractory prostate cancer
Authors: Sircar Kanishka , Yoshimoto Maisa , Monzon Federico A , Koumakpayi Ismael H , Katz Ruth L , Khanna Abha , Alvarez Karla , Chen Guanyong , Darnel Andrew D , Aprikian Armen G , Saad Fred , Bismar Tarek A , Squire Jeremy A 
Published: March 2009

AbstractPTEN haploinsufficiency is common in hormone‐sensitive prostate cancer, though the incidence of genomic deletion and its downstream effects have not been elucidated in clinical samples of hormone refractory prostate cancer (HRPC). Progression to androgen independence is pivotal in prostate cancer and mediated largely by the androgen receptor (AR). Since this process is distinct from metastatic progression, we examined alterations of the PTEN gene in locally advanced recurrent, non‐metastatic human HRPC tissues. Retrospective analyses of PTEN deletion status were correlated with activated downstream phospho‐Akt (p‐Akt) pathway proteins and with the androgen receptor. The prevalence of PTEN genomic deletions in transurethral resection samples of 59 HRPC patients with known clinical outcome was assessed by four‐colour FISH analyses. FISH was performed using six BAC clones spanning both flanking PTEN genomic regions and the PTEN gene locus, and a chromosome 10 centromeric probe. PTEN copy number was also evaluated in a subset of cases using single nucleotide polymorphism (SNP) arrays. In addition, the samples were immunostained with antibodies against p‐Akt, p‐mTOR, p‐70S6, and AR. The PTEN gene was deleted in 77% of cases, with 25% showing homozygous deletions, 18% homozygous and hemizygous deletions, and 34% hemizygous deletions only. In a subset of the study group, SNP array analysis confirmed the FISH findings. PTEN genomic deletion was significantly correlated to the expression of downstream p‐Akt (p < 0.0001), AR (p = 0.025), and to cancer‐specific mortality (p = 0.039). PTEN deletion is common in HRPC, with bi‐allelic loss correlating to disease‐specific mortality and associated with Akt and AR deregulation. Copyright © 2009 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Structure and mechanical properties of impact modified poly(butylene terephthalate)/poly(ethylene terephthalate) blends
Authors: Guerrica‐Echevarría G. , Eguiazábal J.I. 
Published: March 2009

AbstractTwo poly(butylene terephthalate) (PBT)‐rich compositions of PBT/poly(ethylene terephthalate) (PET) blends (5/1 and 2/1) were mixed with up to 30 wt% of a maleinized poly(ethylene‐octene) copolymer (mPEO). The blends were composed of a PBT/PET amorphous phase, a pure mPEO amorphous phase, and the crystalline phases of PBT and mPEO. The average size of the dispersed mPEO particles was larger in the (PBT/PET 5/1)/mPEO blends than in the (PBT/PET 2/1)/mPEO blends, but in both cases larger than that of PET/mPEO blends and smaller than that of PBT/mPEO blends from previous works. The Young's modulus and the yield stress decreased with increasing mPEO contents and the ductility of the 2/1‐based blends remained constant at higher mPEO contents compared to the 5/1‐based blends. Super‐toughness was obtained in both blends, but only the critical interparticle distance (IDc) of the (PBT/PET 5/1)/mPEO blends was used for comparison with those of PET/mPEO, poly(trimethylene terephthalate) (PTT)/mPEO and PBT/mPEO blends in terms of adhesion, because the (PBT/PET 2/1)/mPEO blends showed a simultaneous change in matrix modulus and adhesion. This comparison provided additional support to the proposed “saturation” of the interactions between the ester and maleic groups in this series and to the role of adhesion on IDc (higher adhesion, lower IDc). POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers
Facile fabrication of novel Eu‐containing copolymer and luminescent properties
Authors: Huang Ziqun , Zhang Huaihong , Guo Jiaxiu , Wang Jianli , Chen Yaoqiang 
Published: March 2009

AbstractA new Eu‐containing copolymer was successfully fabricated through two steps. First, the Eu‐containing monomer was synthesized from 4‐Vinylbenzoic acid and europium ion (Eu3+) complex, which rare‐earth ions connect with the ligand by covalent bands. Next, the copolymer was obtained by free‐radical copolymerization of Eu‐containing monomer with methyl methacrylate using 2, 2′‐azobis(isobutyronitrile) (AIBN) as initiator at low temperature. Infrared spectroscopy, gel permeation chromatography and scanning electron microscopy were applied to characterize the structure of the polymer. UV‐visible absorption/photoluminescence spectra and fluorescence spectra were taken to valuate the photophysical properties of the obtained Eu‐containing copolymer. The experimental result shows that the strong luminescence of europium ions substantiates optimum energy match and effective intramolecular energy transfer between the triplet state energy of coordination complex and the emissive energy level of the rare‐earth ions. A study of the dependence of emission intensities of the Eu‐containing nanoparticles on the Eu content showed that the emission intensities increased nearly linearly with increasing Eu content. In addition, no significant emission concentration quenching phenomenon was observed at the Eu content of 0–4.61 mol%. The hybrid material systems can be expected to have potential applications in light conversion materials. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers
Membranes, strings and integrability
Authors: Krishnan C. , Maccaferri C. 
Published: March 2009

AbstractIn the first half of this note, after briefly motivating and reviewing membrane field theories, we discuss their BPS funnel solutions. We discuss some aspects of embedding M‐theory fuzzy funnels in these theories. In the second half, we focus on ABJM theory and discuss a test of AdS4/CFT3 based on integrability. We discuss a numerical mismatch at one loop in worldsheet perturbation theory and its possible resolutions.
Non chiral dynamical flavors and screening on the conifold
Authors: Bigazzi F. , Cotrone A.L. , Paredes A. , Ramallo A. 
Published: March 2009

AbstractWe present a new class of string theory solutions which are conjectured to be dual to the 𝒩 = 1 conifold theory by Klebanov and Witten coupled to non chiral massive dynamical flavors. These are introduced, in the Veneziano limit, by means of suitably embedded and smeared D7‐branes whose full backreaction on the background is taken into account. The string solutions are used to study chromoelectric charge screening effects due to the dynamical flavors in the non perturbative regime of the dual gauge theories.
Wrapping interactions in standard and β‐deformed 𝒩 = 4 SYM
Authors: Fiamberti F. , Santambrogio A. , Sieg C. , Zanon D. 
Published: March 2009

AbstractWe study finite‐size effects on the anomalous dimensions of two‐impurity operators at four loops in 𝒩 = 4 SYM and of single‐impurity operators at the critical order up to nine loops in the β‐deformed version of the theory.
𝒩 = 2 world‐sheet approach to D‐branes on generalized Kähler geometries: II. Dualities
Authors: Sevrin A. , Staessens W. , Wijns A. 
Published: March 2009

AbstractFollowing the general formalism reviewed in [10] we present several examples of possible D3‐brane configurations on four‐dimensional generalized Kähler geometries. We will discuss T‐duality transformations in 𝒩 = 2 boundary superspace and apply the duality transformations to the constructed D3‐branes. The duality transformations lead to a systematic method to construct coisotropic branes, even on target spaces that are not hyper‐Kähler.
Laboratory and field cage studies on female‐targeted attract‐and‐kill bait stations for Anastrepha suspensa (Diptera: Tephritidae)
Authors: Heath Robert R , Lavallee Stephen G , Schnell Elena , Midgarden David G , Epsky Nancy D 
Published: March 2009

AbstractBACKGROUND: Development of attract‐and‐kill bait stations for pest fruit flies has been limited by the water solubility of sugar needed as a feeding stimulant and by the volatility of chemical attractants. A wax‐based matrix was developed that provides the longevity needed for field use and is biodegradable.RESULTS: Laboratory bioassays with the Caribbean fruit fly, Anastrepha suspensa (Loew), confirmed the efficacy of bait stations containing avermectin, methomyl, spinosad and phloxine B. Field cage studies demonstrated that significant mortality occurred with either 1% (w/v) spinosad or 1% (w/v) methomyl bait stations versus pesticide‐free bait stations. Bait stations were exposed to environmental conditions by placing them in trees at the ARS station in Miami, Florida, between tests. There was no loss in efficacy, in spite of exposure to over 360 mm of rainfall over the 56 days of the study, indicating that the bait stations could provide population suppression for at least 1–2 months when used in subtropical environments.CONCLUSION: A long‐lasting, female‐targeted fruit fly bait station, such as the one developed herein, could provide a cost‐effective option for fruit fly population suppression that would be an important tool in tephritid pest management and control. Additional studies are needed to demonstrate efficacy against wild fruit fly populations and determine deployment strategies. Copyright © 2009 Society of Chemical Industry
IR and EPR study of ammonia adsorption effect on silicon nanocrystals
Authors: Konstantinova Elizaveta , Pavlikov Alexander , Vorontsov Alexander , Efimova Alexandra , Timoshenko Victor , Kashkarov Pavel 
Published: March 2009

AbstractIR and EPR spectroscopy is used to investigate the effect of adsorption of dry and wet ammonia on the concentration of equilibrium charge carriers in porous silicon layers with various initial types of dopants. It is found by means of IR spectroscopy that only in the presence of water molecules the ammonia adsorption results in an increase in the concentration of free charge carriers in n‐type samples up to a level exceeding 1018 cm–3. In p‐type samples, a nonmonotonic dependence of the charge‐carrier concentration on ammonia pressure is observed. By means of EPR spectroscopy in the atmosphere of wet ammonia the generation of conduction‐band electrons in p‐type silicon nanocrystals and the increase in the electron concentration in n‐type silicon nanocrystals in comparison with the initial level are observed. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)