bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of Filippov method for the analysis of subharmonic instability in dc–dc converters
Authors: Giaouris Damian , Maity Somnath , Banerjee Soumitro , Pickert Volker , Zahawi Bashar 
Published: September 2009

AbstractWe propose a method of estimating the fast‐scale stability margin of dc–dc converters based on Filippov's theory—originally developed for mechanical systems with impacts and stick‐slip motion. In this method one calculates the state transition matrix over a complete clock cycle, and the eigenvalues of this matrix indicate the stability margin. Important components of this matrix are the state transition matrices across the switching events, called saltation matrices. We applied this method to estimate the stability margins of a few commonly used converter and control schemes. Finally, we show that the form of the saltation matrix suggests new control strategies to increase the stability margin, which we experimentally demonstrate using a voltage‐mode‐controlled buck converter. Copyright © 2008 John Wiley & Sons, Ltd.
Recognition of grouping patterns in trademarks based on the Gestalt psychology
Authors: Iguchi Hiromasa , Abe Koji , Misawa Tadanobu , Kimura Haruhiko , Daido Yoshimasa 
Published: September 2009

AbstractBased on Gestalt principles, in this paper we model features for measuring the degree of similarity between combinations of image components, and grouping areas in trademark images are recognized. This investigation can be used for content‐based image retrieval from the perspective of mirroring human perception of images. The features of proximity, shape similarity, closure, and good continuation are extracted from every combination of two components in an image. After that, based on the decision results, a grouping pattern for the query is fixed. Besides changing combinations of features, the proposed method can output multiple grouping patterns. In the experiments, we evaluated the proposed method on 74 test images, comparing outputs produced by the proposed method and grouping patterns for the test images obtained from questionnaires filled out by 104 participants. © 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 92(10): 49–60, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecj.10007
Practical image measurement of crack width for real concrete structure
Authors: Tomoyuki Yamaguchi  , Hashimoto Shuji 
Published: September 2009

AbstractCrack width is an important data item in inspection and diagnosis for the safety management of concrete structures. Usually the crack width measurement is performed manually by specialists using a crack scale. However, it takes a long time and lacks the objectivity needed for quantitative analysis. Therefore, the importance of image processing for visual inspection has been increasing in civil and construction engineering. Recently, many methods for crack width measurement have been proposed. We have already tried to measure crack width utilizing image processing. However, these methods have concentrated only on the application to test specimens. In this paper, we propose an improved image measurement method for crack width determination, intended for application to real concrete structures. In our method, a crack scale is applied to the concrete surface for image acquisition. The crack width is measured by the brightness of the crack scale areas on the image with sub‐pixel order accuracy. In the real world, the lighting conditions differ in various environments. To deal with such differences, this paper clarifies the conditions of effectiveness of our method for practical use. The validity of the proposed technique is investigated by experiments with images of a real concrete surface. © 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 92(10): 1–12, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecj.10151
Hybrid Materials from Carbon Nanotubes, Nickel Tetrasulfonated Phthalocyanine and Thin Polymer Layers for the Selective Electrochemical Activation of Nitric Oxide in Solution
Authors: Porras Gutierrez Ana , Griveau Sophie , Richard Cyrille , Pailleret Alain , Gutierrez Granados Silvia , Bedioui Fethi 
Published: September 2009

AbstractThe elaboration of hybrid materials from single‐wall carbon nanotubes (SWCNT) and tetrasulfonated nickel phthalocyanine (NiTSPc) was electrochemically performed to obtain chemically modified electrodes with improved electrocatalytic activity towards the electrooxidation of nitric oxide (NO). The characterization of these hybrid electrodes was achieved by cyclic voltammetry and AFM. The electrochemical performances of the electrodes towards the oxidation of NO were then analyzed by chronoamperometry and the obtained results show that the presence of SWCNT greatly enhances the electrocatalytic performances in terms of current intensity. Additional coatings were then electrodeposited over the hybrid electrodes to act as selective membranes against four major interfering analytes: nitrite, ascorbate, hydrogen peroxide andL‐arginine. Several polymer coatings were tested to achieve the best balance between sensitivity to NO and selectivity against interferents.
Exercise enhances hippocampal‐dependent learning in the rat: Evidence for a BDNF‐related mechanism
Authors: Griffin Éadaoin W. , Bechara Ranya G. , Birch Amy M. , Kelly Áine M. 
Published: September 2009

AbstractShort periods of forced exercise have been reported to selectively induce enhancements in hippocampal‐dependent cognitive function, possibly via brain‐derived neurotrophic factor (BDNF)‐mediated mechanisms. In this study, we report that 1 week of treadmill running significantly enhanced both object displacement (spatial) and object substitution (nonspatial) learning. These behavioral changes were accompanied by increased expression of BDNF protein in the dentate gyrus, hippocampus, and perirhinal cortex. The effects of exercise on object substitution were mimicked by intracerebroventricular injection of BDNF protein. These data are consistent with the hypothesis that exercise has the potential to enhance cognitive function in young healthy rats, possibly via a mechanism involving increased BDNF expression in specific brain regions. © 2009 Wiley‐Liss, Inc.
Identification of the murine AAVrh32.33 capsid‐specific CD8+ T cell epitopes
Authors: Mays Lauren E. , Wilson James M. 
Published: September 2009

AbstractBackgroundAdeno‐associated virus (AAV) is an ideal gene therapy vector and is non‐immunogenic in many small animal models. The stable gene expression commonly seen in murine models does not necessarily translate to nonhuman primates and higher‐order species, highlighting the need for a better understanding of immune activation to these vectors. One capsid variant, AAVrh32.33, demonstrates a unique phenotype in murine muscle, reminiscent of what is often seen in higher‐order species. AAVrh32.33 generates a strong CD8+ T‐cell response to both capsid and encoded transgene antigens in a manner independent of transgene product or major histocompatability complex haplotype, making it an ideal candidate for studying immune activation to AAV in the mouse.MethodsTo map the H‐2b and H‐2d dominant epitopes of the AAVrh32.33 capsid, C57BL/6 or Balb/C mice received an intramuscular injection of 1 × 1011 genome copies of AAV2/rh32.33.CB.nLacZ. Three weeks later, splenocytes were harvested and stimulated in vitro with pooled or individual peptides from the AAVrh32.33 capsid peptide library and analysed by an interferon (IFN)‐γ enzyme‐linked immunosorbent spot assay or intracellular cytokine staining.ResultsThe immunodominant epitopes within the AAVrh32.33 capsid responsible for driving CD8+ T‐cell responses to the capsid protein in C57BL/6 (SSYELPYVM) and Balb/C (KIPASGGNAL) mice were defined.ConclusionsIdentification of dominant capsid epitopes will make it possible to monitor cellular responses to the AAV capsid in vivo, facilitating mechanistic studies critical to defining how cellular immunity to the AAV capsid arises and, ultimately, how the generation of capsid‐specific T cells can be avoided to ensure safety in a gene therapy setting. Copyright © 2009 John Wiley & Sons, Ltd.
Detection of adulterations in processed coffee with cereals and coffee husks using capillary zone electrophoresis
Authors: Nogueira Thiago , do Lago Claudimir Lucio 
Published: September 2009

AbstractThe proposed method for the identification of adulteration was based on the controlled acid hydrolysis of xylan and starch present in some vegetable adulterants, followed by the analysis of the resulting xylose and glucose, which are the monosaccharides that compose, respectively, the two polysaccharides. The acid hydrolysis with HCl increases the ionic strength of the sample, which impairs the electrophoretic separation. Thus, a neutralization step based on anion exchange resin was necessary. The best separations were obtained in NaOH 80 mmol/L, CTAB 0.5 mmol/L, and methanol 30% v/v. Because of the high value of pH, monosaccharides are separated as anionic species in such running electrolyte. The LOQ for both monosaccharides was 0.2 g for 100 g of dry matter, which conforms to the tolerable limits.
Scale‐dependent hierarchy of structural elements in the microstructure of thermomechanical treated ferritic steels with residual austenite
Authors: Teplyakova L. , Gershteyn G. , Popova N. , Kozlov E. , Ignatenko L. , Springer R. , Schaper M. , Bach Fr.‐W. 
Published: September 2009

AbstractExperimental results of the structural investigations of dislocations and carbides are presented here for four steels with ferritic‐carbide structures which were subjected to different final thermal processing. The investigation was carried out using different methods which involved optical microscopy, REM, TEM and x‐ray structural analysis. The complex procedures implemented permitted both investigations at intervals from the macro to the micro scale as well as detection of the total spectrum of the scale and structure levels which form during the steel's thermal treatment. As a consequence of these analyses, representative structural volume elements (RSVE) were detected which includes all relevant structural parameters, i.e. dislocation structures, precipitates and phases.
Microwave notch filters using embedded stubs
Authors: Hsue Ching‐Wen , Mittra Raj , Tsai Yi‐Hsien , Hsu Chih‐Chen 
Published: September 2009

AbstractEmbedded stubs are employed to implement microwave notch filters with narrow bandwidth and sharp rejection rate. The embedded stub exhibits higher equivalent characteristic impedance and takes less area than the conventional shunt stub. An equal‐length, two‐section stub offers multiple stop‐bands which are fundamentally different from those obtained in conventional quarter‐wavelength stub. Experimental results are presented to show the validity of the design method. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2839–2842, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24760
Design of a periodically nonuniform coupled microstrip lines (PNCML) filter using the novel method of lines
Authors: Abas Amr A. , Saker Hossam A. , Abdallah Esmat A. , El‐Henawy Hadya M. 
Published: September 2009

AbstractA new eigenmode algorithm based on the method of lines and the generalized transmission line equations is applied on full‐wave analysis of (3‐D) MMIC components. The analytical calculation in the direction of propagation enables the analysis of structures of very short or long interconnections between single discontinuities. The analysis is developed by nonequidistant discretization to reduce the discretization window. In this article, a periodically nonuniform coupled microstrip lines filter is designed to offer a wide band performance with a small size structure and with harmonic suppression. The analysis of this filter is applied using the new technique of the method of lines. In this analysis, the scattering parameters of the designed filter are computed. The designed filter is fabricated and tested, where good agreement is found between the numerical and the experimental results. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2865–2870, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24763
Psychometric testing of four transtheoretical model questionnaires for the behavior, completing health care proxies
Authors: Jezewski Mary Ann , Finnell Deborah S. , Wu Yow‐Wu Bill , Meeker Mary Ann , Sessanna Loralee , Lee Jongwon 
Published: September 2009

AbstractThe purpose of the study was to develop four questionnaires based on the transtheoretical model (TTM) to assess the behavior, completing a healthcare proxy (HCP). The aims were to (a) operationalize the four TTM constructs for completing a HCP and (b) evaluate the psychometric properties of the questionnaires. The questionnaires were constructed and content validity established using an expert panel. Internal consistency values for each questionnaire and subscales within each questionnaire were >.79. Confirmatory factor analysis provided evidence that decisional balance and the processes of change questionnaires each contained two factors. Our data support validity and reliability of the TTM questionnaires related to HCP completion. © 2009 Wiley Periodicals, Inc. Res Nurs Health 32:606–620, 2009
Correlates of physical activity in low income college students
Authors: Maglione Joyce L. , Hayman Laura L. 
Published: September 2009

AbstractThe importance of physical activity as a health promoting behavior has been well documented. We examined the relationship of social support, self‐efficacy, and commitment to a plan of physical activity on physical activity behaviors in a sample of low income college students. Those with higher levels of social support, self‐efficacy, and commitment to a plan of physical activity reported more physical activity behaviors. Commitment to a plan of physical activity mediated the relationships of social support and physical activity behavior, and of self‐efficacy and physical activity behavior. The results support the importance of exploring the psychosocial correlates of physical activity in explaining the decision process that underlies physical activity behavior. © 2009 Wiley Periodicals, Inc. Res Nurs Health 32:634–646, 2009
The association of depression and anxiety with health‐related quality of life in cancer patients with depression and/or pain
Authors: Brown Linda F. , Kroenke Kurt , Theobald Dale E. , Wu Jingwei , Tu Wanzhu 
Published: September 2009

AbstractObjectives: Depression is known to be a major problem in cancer patients, and evidence is emerging about the importance of anxiety. Because the disorders are highly comorbid, we examined the relationship of anxiety and depression with health‐related quality of life (HRQL) in cancer patients.Methods: Sample included 405 adult oncology patients participating in a randomized controlled trial of telecare management for pain and depression. This secondary cross‐sectional analysis of baseline data examined independent and additive effects of anxiety and depression on HRQL, disability, and somatic symptom severity.Results: In 397 patients who screened positive for either pain or depression or both, 135 had comorbid anxiety and depression, 174 had depression but not anxiety, and 88 had neither. Differences existed across all nonphysical HRQL domains and were more pronounced incrementally across the three groups in the expected direction. In GLM modeling, anxiety and depression were each associated with all the domains when modeled separately (p<0.0001). When modeled together, anxiety and depression had independent and additive effects on the mental health domains of HRQL and on somatic symptom burden. In other domains (vitality, perceived disability, overall quality of life, and general health perceptions), only depression had an effect.Conclusion: Anxiety and depression have strong and independent associations with mental health domains and somatic symptom burden in cancer patients. However, depression has a more pervasive association with multiple other domains of HRQL. Paying attention to both anxiety and depression may be particularly important when addressing mental health needs and somatic symptom distress. Copyright © 2009 John Wiley & Sons, Ltd.
Protocols and techniques for a scalable atom–photon quantum network
Authors: Luo L. , Hayes D. , Manning T.A. , Matsukevich D.N. , Maunz P. , Olmschenk S. , Sterk J.D. , Monroe C. 
Published: September 2009

AbstractQuantum networks based on atomic qubits and scattered photons provide a promising way to build a large‐scale quantum information processor. We review quantum protocols for generating entanglement and operating gates between two distant atomic qubits, which can be used for constructing scalable atom–photon quantum networks. We emphasize the crucial role of collecting light from atomic qubits for large‐scale networking and describe two techniques to enhance light collection using reflective optics or optical cavities. A brief survey of some applications for scalable and efficient atom–photon networks is also provided.
Tracking for nonlinear plants with multiple unknown time‐varying state delays using sliding mode with adaptation
Authors: Mirkin Boris , Gutman Per‐Olof , Shtessel Yuri 
Published: September 2009

AbstractIn this paper, we develop a sliding mode model reference adaptive control (MRAC) scheme for a class of nonlinear dynamic systems with multiple time‐varying state delays, which is robust with respect to unknown plant delays, to a nonlinear perturbation, and to an external disturbance with unknown bounds. An appropriate Lyapunov–Krasovskii‐type functional is introduced to design the adaptation algorithms, and to prove stability. Copyright © 2009 John Wiley & Sons, Ltd.
Automatic appearance‐based loop detection from three‐dimensional laser data using the normal distributions transform
Authors: Magnusson Martin , Andreasson Henrik , Nüchter Andreas , Lilienthal Achim J. 
Published: September 2009

AbstractWe propose a new approach to appearance‐based loop detection for mobile robots, using three‐dimensional (3D) laser scans. Loop detection is an important problem in the simultaneous localization and mapping (SLAM) domain, and, because it can be seen as the problem of recognizing previously visited places, it is an example of the data association problem. Without a flat‐floor assumption, two‐dimensional laser‐based approaches are bound to fail in many cases. Two of the problems with 3D approaches that we address in this paper are how to handle the greatly increased amount of data and how to efficiently obtain invariance to 3D rotations. We present a compact representation of 3D point clouds that is still discriminative enough to detect loop closures without false positives (i.e., detecting loop closure where there is none). A low false‐positive rate is very important because wrong data association could have disastrous consequences in a SLAM algorithm. Our approach uses only the appearance of 3D point clouds to detect loops and requires no pose information. We exploit the normal distributions transform surface representation to create feature histograms based on surface orientation and smoothness. The surface shape histograms compress the input data by two to three orders of magnitude. Because of the high compression rate, the histograms can be matched efficiently to compare the appearance of two scans. Rotation invariance is achieved by aligning scans with respect to dominant surface orientations. We also propose to use expectation maximization to fit a gamma mixture model to the output similarity measures in order to automatically determine the threshold that separates scans at loop closures from nonoverlapping ones. We discuss the problem of determining ground truth in the context of loop detection and the difficulties in comparing the results of the few available methods based on range information. Furthermore, we present quantitative performance evaluations using three real‐world data sets, one of which is highly self‐similar, showing that the proposed method achieves high recall rates (percentage of correctly identified loop closures) at low false‐positive rates in environments with different characteristics. © 2009 Wiley Periodicals, Inc.
Ultrasound‐Guided Vacuum‐Assisted Breast Biopsy System for Diagnosis and Minimally Invasive Excision of Intraductal Papilloma Without Nipple Discharge
Authors: Wei Hu , Jiayi Fan , Qinping Zhang , Junyi Shi , Yuan Shen , Li Li , Dongwei Su , Liying Qing 
Published: September 2009

AbstractBackgroundAs intraductal papilloma (IP) includes both benign and malignant lesions, it is difficult to decide whether the patient should merely be followed up. The purpose of this study is to validate the ultrasound (US)‐guided vacuum‐assisted breast biopsy system (Mammotome) for diagnosis and minimally invasive excision of IP.MethodsSix women with breast cystic‐solid lesions without nipple discharge underwent B‐US‐guided 8‐gauge Mammotome biopsy. Interval US surveillance was performed at a median time of 7 months (range 5–12 months).ResultsAll lesions were removed accurately and thoroughly with satisfactory cosmetic outcomes. All of them were histologically diagnosed as IP. No clinically significant hematoma developed.ConclusionsThe US‐guided 8‐gauge Mammotome biopsy provides an accurate pathologic diagnosis and successful complete excision of cystic‐solid breast lesions. This technique appears to be an alternative to surgical biopsy in IP patients without nipple discharge.
Secondary disorders of glycosylation in inborn errors of fructose metabolism
Authors: Quintana E. , Sturiale L. , Montero R. , Andrade F. , Fernandez C. , Couce M. L. , Barone R. , Aldamiz‐Echevarria L. , Ribes A. , Artuch R. , Briones P. 
Published: September 2009

SummaryAdamowicz and colleagues raised the alert in 2007 about patients with atypical hereditary fructose intolerance (HFI) primarily misdiagnosed as CDG Ix. We describe a girl with neonatal hypertonia, facial trismus, absent swallowing and coughing reflexes, gastro‐oesophageal reflux and sporadically elevated Krebs cycle metabolites and lactate. At 14 months microcephaly and hepatomegaly were noted, with hypertransaminasaemia but normal blood coagulation, glucose, phosphate, and absent urinary reducing substances. Neurological impairment persisted. Because of hepatic and neurological abnormalities with developmental delay, Tf IEF was performed and showed a severe type 1 pattern, resulting in a wrong diagnosis of CDG. Subsequently, an aversion to fruits suggested HFI, confirmed by the finding of ALDOB mutations (p.A150P/p.N335K). The girl improved with fructose‐free diet, but liver cirrhosis led to hepatic transplantation. She is now 7 years old with good evolution; facial trismus and hypertonia reversed, but microcephaly persists. Transferrin MALDI‐TOF MS characterization revealed underoccupation of glycosylation sites and glycan abnormalities, which reversed with dietary treatment. High maternal fructose concentrations might have caused neonatal abnormalities. Although in our patient's mother there is no fructose accumulation at present, it is possible that increased ingestion of fruits and vegetables during pregnancy, together with her heterozygosity, caused an accumulation of fructose that finally affected the fetus. We also describe slightly abnormal transferrin isoelectric focusing and MALDI‐TOF MS patterns of intact transferrin and N‐glycans in a fructose‐1,6‐bisphosphatase (FBP1)‐deficient patient. While HFI is a well‐known cause of secondary CDG, we found no reports of abnormal transferrin isoelectric focusing patterns in FBP1 deficiency and we introduce this condition as a possible secondary cause for altered transferrin isoelectric focusing.