bluuebunny/crossref_metadata_2025_split huggingface dataset:
An efficient method for combining adaptive echo and noise canceller in hands‐free systems
Authors: Mohammed Jafar Ramadhan 
Published: June 2008

AbstractAcoustic interferences severely degrade the quality and the intelligibility of the desired speech signal, thus posing a severe problem for many speech applications. Several acoustic echo cancellation (AEC) techniques have been proposed with a view to solving this problem. There are, however, few reports of AEC methods working under real noisy conditions. In this paper, we investigate the maximum positive synergies of the combination of acoustic echo canceller with a new adaptive beamformer. The proposed system achieves both the AEC and noise reduction of speech in an actual environment with real noise sources. Since the AEC is located behind the fixed beamformer of the new adaptive beamformer only one AEC is required for an arbitrary number of array elements, and the AEC does not feel any repercussions from the new adaptive beamformer. The proposed system was implemented in a real environment using National Instruments NI‐PXI‐1042Q controller system and data acquisition card PXI‐4472. Experimental results show that the proposed system has successfully improved the performance of hands‐free systems. Copyright © 2008 John Wiley & Sons, Ltd.
Model predictive control of nonlinear stochastic partial differential equations with application to a sputtering process
Authors: Lou Yiming , Hu Gangshi , Christofides Panagiotis D. 
Published: June 2008

AbstractA method is developed for model predictive control of nonlinear stochastic partial differential equations (PDEs) to regulate the state variance, which physically represents the roughness of a surface in a thin film growth process, to a desired level. Initially a nonlinear stochastic PDE is formulated into a system of infinite nonlinear stochastic ordinary differential equations by using Galerkin's method. A finite‐dimensional approximation is then derived that captures the dominant mode contribution to the state variance. A model predictive control problem is formulated, based on the finite‐dimensional approximation, so that the future state variance can be predicted in a computationally efficient way. To demonstrate the method, the model predictive controller is applied to the stochastic Kuramoto‐Sivashinsky equation, and the kinetic Monte Carlo model of a sputtering process to regulate the surface roughness at a desired level. © 2008 American Institute of Chemical Engineers AIChE J, 2008
Dynamics of fines deposition in an alternating semifluidized bed
Authors: Dehkissia S. , Baçaoui A. , Iliuta I. , Larachi F. 
Published: June 2008

AbstractA semifluidized bed was proposed to allay bed plugging during the filtration of fines‐hydrocarbon suspensions. Mitigation of plugging was allowed by alternating semifluidization during capture with unconstrained fluidization for removal of deposits. Solids holdup conditions were established to prevent deposition in the fluidization section. The cyclic parameters were varied to allow efficient removal of deposits during washing. Analysis with a filtration model accounting for solids detachment in the fixed bed section revealed that the fluidization section favored growth of aggregate size entering the fixed bed. Analysis of the split ratios between fixed and fluidized bed heights revealed that the shallowest fluidization sections delayed deposition in the fixed bed. In cyclic operation, reversibility of the semifluidized bed was best recovered via gas injection during the washing stages. However, the filtration times in successive cycles shortened with increasing washing times but lengthened with increasing the washing superficial suspension velocity. © 2008 American Institute of Chemical Engineers AIChE J, 2008
Effect of the silane modification of an organoclay on the properties of polypropylene/clay composites
Authors: Joo Jung Hiuk , Shim Jae Hun , Choi Jae Hoon , Choi Chi‐Hoon , Kim Dae‐Sik , Yoon Jin‐San 
Published: June 2008

AbstractA commercial clay, Cloisite®20A (C20A) was modified with three different silane compounds, propyltrimethoxy silane, octyltrimethoxy silane, and octadecyltrimethoxy silane, to control the hydrophobicity of C20A. The amount of the silane compounds grafted to C20A was quantified from the weight loss by using TGA, and the hydrophobicity was evaluated by the amount of water absorption. The variation of the interlayer distance was traced by XRD and TEM observation. SEM/EDS was employed to visualize the morphology of the fractured surface and the degree of dispersion of the clay layers in the PP/clay composites. Measurements of the tensile properties of the PP/clay composites indicated that the composite made from PP and the C20A modified with octadecyltrimethoxy silane exhibited the most excellent tensile properties. This was ascribed to the fact that the C20A modified with octadecyltrimethoxy silane possessed the most favorable interfacial interaction with PP and thus the degree of dispersion of the clay layers was the best in the PP matrix. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Effect of swelling pretreatment on the deposition structure on electroless copper of polyacrylonitrile nanocomposites for electromagnetic interference shielding
Authors: Chen Chang‐Cheng , Hung Chih‐Wei , Yang Sung‐Yeng , Huang Chi‐Yuan 
Published: June 2008

AbstractIn this investigation, the electroless copper method with various cupric sulfate concentrations (0.24, 0.36, 0.48, 0.60M) without sensitizing and activating is used to deposit electroless copper compounds (CuS) on the swelling pretreatment polyacrylonitrile(SPAN) surface for electromagnetic interference (EMI) shielding materials. The acetic acid can swell polyacrylonitrile (PAN) effectively which donot destroy the hexagonal structure of polyacrylonitrile, only looses the molecule chain of polyacrylonitrile then the hexagonal CuS crystal deposits on the SPAN easily, and increases the EMI shielding effectiveness (SE) of CuS‐SPAN composites. However, the nearly amorphous of CuS deposits on the surface of without swelling pretreatment PAN(CuS‐PAN). The EMI SE of CuS‐SPAN composites are better than those of CuS‐PAN, 10–15 dB larger from CuS‐PAN. In the study, the best EMI SE of CuS‐SPAN and CuS‐PAN composites are about 30–35 dB and 18–20 dB respectively, as the cupric ion concentration is 0.48M. From the high resolution transmission electron micrographs(HR‐TEM) analysis, there are two structures, face‐centered cubic(FCC) Cu2‐xS crystal in the inner layer of CuS‐SPAN composite and hexagonal CuS crystal on the outer layer of CuS‐SPAN composite, in the SPAN as the cupric ion concentration is 0.48M. The particle size distribution of Cu2‐xS in the inner layer of CuS‐SPAN is from 6 to 30 nm. However, the major particle size distribution of Cu2‐xS in the inner layer of CuS‐SPAN is from 15 to 20 nm. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Eliminating side products and increasing succinate yields in engineered strains of Escherichia coli C
Authors: Jantama Kaemwich , Zhang Xueli , Moore J.C. , Shanmugam K.T. , Svoronos S.A. , Ingram L.O. 
Published: June 2008

AbstractDerivatives of Escherichia coli C were previously described for succinate production by combining the deletion of genes that disrupt fermentation pathways for alternative products (ldhA::FRT, adhE::FRT, ackA::FRT, focA‐pflB::FRT, mgsA, poxB) with growth‐based selection for increased ATP production. The resulting strain, KJ073, produced 1.2 mol of succinate per mol glucose in mineral salts medium with acetate, malate, and pyruvate as significant co‐products. KJ073 has been further improved by removing residual recombinase sites (FRT sites) from the chromosomal regions of gene deletion to create a strain devoid of foreign DNA, strain KJ091(ΔldhA ΔadhE ΔackA ΔfocA‐pflB ΔmgsA ΔpoxB). KJ091 was further engineered for improvements in succinate production. Deletion of the threonine decarboxylase (tdcD; acetate kinase homologue) and 2‐ketobutyrate formate‐lyase (tdcE; pyruvate formate‐lyase homologue) reduced the acetate level by 50% and increased succinate yield (1.3 mol mol−1 glucose) by almost 10% as compared to KJ091 and KJ073. Deletion of two genes involved in oxaloacetate metabolism, aspartate aminotransferase (aspC) and the NAD+‐linked malic enzyme (sfcA) (KJ122) significantly increased succinate yield (1.5 mol mol−1 glucose), succinate titer (700 mM), and average volumetric productivity (0.9 g L−1 h−1). Residual pyruvate and acetate were substantially reduced by further deletion of pta encoding phosphotransacetylase to produce KJ134 (ΔldhA ΔadhE ΔfocA‐pflB ΔmgsA ΔpoxB ΔtdcDE ΔcitF ΔaspC ΔsfcA Δpta‐ackA). Strains KJ122 and KJ134 produced near theoretical yields of succinate during simple, anaerobic, batch fermentations using mineral salts medium. Both may be useful as biocatalysts for the commercial production of succinate. Biotechnol. Bioeng. © 2008 Wiley Periodicals, Inc.
Effect of culture temperature on erythropoietin production and glycosylation in a perfusion culture of recombinant CHO cells
Authors: Ahn Woo Suk , Jeon Jae‐Jin , Jeong Yeong‐Ran , Lee Seung Joo , Yoon Sung Kwan 
Published: June 2008

AbstractTo investigate the effect of culture temperature on erythropoietin (EPO) production and glycosylation in recombinant Chinese hamster ovary (CHO) cells, we cultivated CHO cells using a perfusion bioreactor. Cells were cultivated at 37°C until viable cell concentration reached 1 × 107 cells/mL, and then culture temperature was shifted to 25°C, 28°C, 30°C, 32°C, 37°C (control), respectively. Lowering culture temperature suppressed cell growth but was beneficial to maintain high cell viability for a longer period. In a control culture at 37°C, cell viability gradually decreased and fell below 80% on day 18 while it remained over 90% throughout the culture at low culture temperature. The cumulative EPO production and specific EPO productivity, qEPO, increased at low culture temperature and were the highest at 32°C and 30°C, respectively. Interestingly, the cumulative EPO production at culture temperature below 32°C was not as high as the cumulative EPO production at 32°C although the qEPO at culture temperature below 32°C was comparable or even higher than the qEPO at 32°C. This implies that the beneficial effect of lowering culture temperature below 32°C on qEPO is outweighed by its detrimental effect on the integral of viable cells. The glycosylation of EPO was evaluated by isoelectric focusing, normal phase HPLC and anion exchange chromatography analyses. The quality of EPO at 32°C in regard to acidic isoforms, antennary structures and sialylated N‐linked glycans was comparable to that at 37°C. However, at culture temperatures below 32°C, the proportions of acidic isoforms, tetra‐antennary structures and tetra‐sialylated N‐linked glycans were further reduced, suggesting that lowering culture temperature below 32°C negatively affect the quality of EPO. Thus, taken together, cell culture at 32°C turned out to be the most satisfactory since it showed the highest cumulative EPO production, and moreover, EPO quality at 32°C was not deteriorated as obtained at 37°C. Biotechnol. Bioeng. 2008;101: 1234–1244. © 2008 Wiley Periodicals, Inc.
Parallel simulation for a fish schooling model on a general‐purpose graphics processing unit
Authors: Li Hong , Kolpas Allison , Petzold Linda , Moehlis Jeff 
Published: June 2008

AbstractWe consider an individual‐based model for fish schooling, which incorporates a tendency for each fish to align its position and orientation with an appropriate average of its neighbors' positions and orientations, in addition to a tendency for each fish to avoid collisions. To accurately determine the statistical properties of the collective motion of fish whose dynamics are described by such a model, many realizations are typically required. This carries a very high computational cost. The current generation of graphics processing units is well suited to this task. We describe our implementation and present computational experiments illustrating the power of this technology for this important and challenging class of problems. Copyright © 2008 John Wiley & Sons, Ltd.
An efficient compression scheme for data communication which uses a new family of self‐organizing binary search trees
Authors: Rueda Luis , Oommen B. John 
Published: June 2008

AbstractIn this paper, we demonstrate that we can effectively use the results from the field of adaptive self‐organizing data structures in enhancing compression schemes. Unlike adaptive lists, which have already been used in compression, to the best of our knowledge, adaptive self‐organizing trees have not been used in this regard. To achieve this, we introduce a new data structure, the partitioning binary search tree (PBST) which, although based on the well‐known binary search tree (BST), also appropriately partitions the data elements into mutually exclusive sets. When used in conjunction with Fano encoding, the PBST leads to the so‐called Fano binary search tree (FBST), which, indeed, incorporates the required Fano coding (nearly equal probability) property into the BST. We demonstrate how both the PBST and the FBST can be maintained adaptively and in a self‐organizing manner. The updating procedure that converts a PBST into an FBST, and the corresponding new tree‐based operators, namely the shift‐to‐left and the shift‐to‐right operators, are explicitly presented. The encoding and decoding procedures that also update the FBST have been implemented and rigorously tested. Our empirical results on the files of the well‐known benchmarks, the Calgary and Canterbury Corpora, show that the adaptive Fano coding using FBSTs, the Huffman, and the greedy adaptive Fano coding achieve similar compression ratios. However, in terms of encoding/decoding speed, the new scheme is much faster than the latter two in the encoding phase, and they achieve approximately the same speed in the decoding phase. We believe that the same philosophy, namely that of using an adaptive self‐organizing BST to maintain the frequencies, can also be utilized for other data encoding mechanisms, even as the Fenwick scheme has been used in arithmetic coding. Copyright © 2008 John Wiley & Sons, Ltd.
A correlation study on diagnostic endoscopic ultrasound‐guided fine‐needle aspiration of lymph nodes with histological and clinical diagnoses, the UCLA Medical Center experience
Authors: Naini Bita V. , Apple Sophia K. , Presley Michelle , Moatamed Neda A. 
Published: June 2008

AbstractEndoscopic ultrasound guided (EUS) FNA procedure has two aspects, the endoscopic sampling and the FNA interpretation. The two aspects of the procedure are performed in two different disciplines; gastroenterology (EUS) and pathology (FNA). The aim of this study was to evaluate the concordance, sensitivity, specificity, positive predictive (PPV), and negative predictive values (NPV).Sixty‐one EUS‐FNA procedures of the lymph nodes were analyzed by correlating the FNA results with histological or clinical diagnoses. The lymph nodes were divided in five groups; mediastinal, gastrohepatic, peripancreatic, portal, and perirectal.The study showed a concordance of 92% in mediastinal, 80% in gastrohepatic, 81% in peripancreatic, 95% in portal, and 100% in perirectal lymph nodes with an overall sensitivity of 84%, specificity of 92%, PPV of 88%, and NPV of 89%.In conclusion, EUS‐FNA offers an invaluable approach for diagnostic examination of the internal lymph nodes where percutaneous FNA is either difficult or impossible. impossible. Diagn. Cytopathol. 2008;36:460–466. © 2008 Wiley‐Liss, Inc.
Fine‐needle aspiration cytology of a lipoblastoma: A case report
Authors: Hong Ran , Choi Dong‐Youl , Do Nam‐Yong , Lim Sung‐Chul 
Published: June 2008

AbstractA lipoblastoma is a rare benign tumor of immature white fat, and more than 90% of lipoblastomas occur before the age of 3 years. The diagnosis of a lipoblastoma is mostly dependent on a histopathological examination of a surgically excised specimen. However, an accurate preoperative diagnosis is essential for the planning of surgery, particularly for a lesion of the head and neck area. We experienced a case of a cervical lipoblastoma of a 23‐month‐old boy. A preoperative fine‐needle aspiration biopsy showed the sample as moderately cellular and showed fragments of mature and immature adipose tissues containing a large number of capillary vessels. There were numerous lipoblast‐looking cells with a multivacuolated cytoplasm, and the nuclei were small, compressed by vacuoles, and centrally located. According to the cytological findings, the lesion was diagnosed as a benign adipose tumor suggestive of a lipoblastoma. Subsequent surgical excision confirmed the diagnosis of the fine‐needle aspiration biopsy. The cytologic features of lipoblastoma are not well known because of the rarity of the lesion. However, the fine‐needle aspiration cytological features of a lipoblastoma are sufficiently characteristic to make a specific preoperative diagnosis. Diagn. Cytopathol. 2008;36:508–511. © 2008 Wiley‐Liss, Inc.
Adenosis tumor of the breast: Cytological and radiological features of a case confirmed by histology
Authors: El Aouni Nadra , Balleyguier Corinne , Mansouri Dhouha , Mathieu Marie‐Christine , Suciu Voichita , Delaloge Suzette , Vielh Philippe 
Published: June 2008

AbstractWe report the case of a 63‐year‐old woman who presented with a right breast lump detected by screening mammography. The lesion was nonpalpable, and the ultrasonography revealed suspicious features. In contrast with imaging features, fine‐needle aspiration cytology showed benign ductal cells arranged in groups, with fragments of hyalinized eosinophilic stroma, and round or bipolar bare nuclei in the background, findings consistent with a benign tumor. A core needle biopsy performed to rule out a breast cancer revealed an adenosis tumor of the breast. Diagn. Cytopathol. 2008;36:496–498. © 2008 Wiley‐Liss, Inc.
Fine‐needle aspiration cytology of Rosai‐Dorfman disease of bone
Authors: Jing Xin , McHugh Jonathan B. , Pu Robert T. 
Published: June 2008

AbstractSinus histiocytosis with massive lymphadenopathy (Rosai‐Dorfman disease) is a rare, benign self‐limiting condition of unknown etiology. Less than a quarter of cases have only extranodal involvement and a few cases of skeletal involvement of Rosai‐Dorfman disease without associated lymphadenopathy have been reported in the literature. We herein report cytohistologic findings in a case of sole skeletal Rosai‐Dorfman disease in a 51‐year‐old woman who presented with an expansile, heterogeneous lesion at T11 with cord compression and edema. A CT‐guided fine‐needle aspiration of T‐11 lesion was performed and the sample was processed by ThinPrep technique. The ThinPrep smear showed characteristic features of Rosai‐Dorfman disease including hypercellularity with moderate number of histiocytes in a background of lymphocytes, plasma cells, and neutrophils. The histiocytes possessed abundant, pale and vacuolated cytoplasm, rounded nuclei with smooth nuclear membranes, fine chromatin, and distinct nucleoli. The histiocytes showed emperipolesis of lymphocytes and neutrophils. The diagnosis was confirmed by concurrent biopsy with immunhistochemical study. Our case highlighted the role of fine‐needle aspiration with ThinPrep technique in the diagnosis of Rosai‐Dorfman disease. Diagn. Cytopathol. 2008;36:516–518. © 2008 Wiley‐Liss, Inc.
General and program‐specific moderators of two eating disorder prevention programs
Authors: Stice Eric , Marti Nathan , Shaw Heather , O'Neil Kelly 
Published: June 2008

AbstractObjective:To investigate general and program‐specific factors hypothesized to moderate the effects of two eating disorder prevention programs.Method:High‐risk adolescent girls (N = 481; M age = 17) were randomized to a dissonance‐based thin‐ideal internalization reduction program, a healthy weight management program, an expressive‐writing control condition, or an assessment‐only control condition. Participants completed diagnostic interviews and surveys at pretest, post‐test, 6‐month follow‐up, and 12‐month follow‐up.Results:Dissonance program effects on bulimic symptoms were stronger for participants with initial elevations in body image distress, bulimic symptoms, and thin‐ideal internalization. Healthy weight program effects on bulimic symptoms were stronger for adolescents with initial elevations in body image distress, bulimic symptoms, readiness to change, body mass, and emotional eating.Conclusion:Overall, intervention effects tended to be amplified for high‐risk versus low‐risk adolescents. However, certain moderator effects appeared to be specific to the two different prevention programs. © 2008 by Wiley Periodicals, Inc. Int J Eat Disord 2008
Nausea and vomiting of pregnancy in women with bulimia nervosa and eating disorders not otherwise specified
Authors: Torgersen Leila , Von Holle Ann , Reichborn‐Kjennerud Ted , Berg Cecilie Knoph , Hamer Robert , Sullivan Patrick , Bulik Cynthia M. 
Published: June 2008

AbstractObjective:To explore the prevalence of pregnancy‐related nausea (PN) and vomiting (PV), and hyperemesis gravidarum (HG), in women with bulimia nervosa (BN) and EDNOS purging subtype (EDNOS‐P).Method:Pregnant women (38,038) enrolled in the Norwegian Mother and Child Cohort Study had questionnaire‐based information on eating disorder diagnosis and PN, PV, and HG. We estimated the odds for PN, PV, and HG using logistic regression.Results:Women with BN, purging subtype, but not women with BN, nonpurging subtype, had statistically significant higher odds of PN and PV compared to women without eating disorders. The EDNOS‐P group showed significantly higher odds of PV. The odds of HG did not differ significantly between those with and without an eating disorder, or across eating disorder subtypes.Conclusion:Our results suggest that eating disorders marked by the symptom of purging are associated with increased odds of PN and PV. © 2008 by Wiley Periodicals, Inc. Int J Eat Disord 2008
Assessment of tracheal temperature and humidity in laryngectomized individuals and the influence of a heat and moisture exchanger on tracheal climate
Authors: Zuur J. Karel , Muller Saar H. , Vincent Andrew , Sinaasappel Michiel , de Jongh Frans H. C. , Hilgers Frans J. M. 
Published: June 2008

AbstractBackgroundThe beneficial function of heat and moisture exchangers (HMEs) is undisputed, but knowledge of their effects on intra‐airway temperature and humidity is scarce. The aim of this study was to evaluate the clinical applicability of a new airway climate explorer (ACE) and to assess the HME's influence on tracheal climate.MethodsIntratracheal temperature and humidity were measured with and without HME in 10 laryngectomized patients.ResultsAn HME causes the intratracheal mean humidity minima to increase with 3.2 mg H2O/L (95% CI: 1.5–4.8 mg H2O/L; p <.001), from 21.4 to 24.6 mg H2O/L, and the mean temperature minima to decrease with 1.6°C (95% CI: 0.9–2.4°C; p <.001) from 28.5°C to 26.9°C. Relative humidity values suggest that the tested HME keeps inspired air (nearly) fully saturated during the full course of inspiration.ConclusionAssessment of intratracheal temperature and humidity, and evaluation of HME effectiveness is feasible with the ACE. The tested HME significantly increases the intratracheal humidity, but decreases the intratracheal temperature. Relative humidity calculations suggest that increasing the thermal capacity of this rehabilitation device can further increase the heat and moisture exchange efficiency. © 2008 Wiley Periodicals, Inc. Head Neck, 2008