bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis and experiment on simultaneous swing‐up of a parallel cart‐type double inverted pendulum
Authors: Deng Mingcong , Inoue Akira , Henmi Tomohiro , Ueki Nobuyuki 
Published: May 2008

AbstractThis paper considers experimental study and analysis on simultaneous swing‐up control of a parallel cart‐type double inverted pendulum. The proposed controller includes both a swing‐up controller based on weighted energy related function and a cart travel controller designed by a pole assignment control scheme. The cart travel controller can restrict cart travel during the swing‐up. When the two pendulums are swung up, the controller will be switched to a stabilizing controller, and the controller can take the cart to the initial position. Control simulation and experiment were successfully conducted. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Control over a packet dropping network with norm bounded uncertainties
Authors: Shi Ling , Epstein Michael , Murray Richard M. 
Published: May 2008

AbstractIn this paper, we consider a robust networked control problem. We consider linear unstable and uncertain discrete time plants with a network between the sensor and controller as well as between the controller and plant. We investigate the effect of data dropout in the form of packet losses and we focus on the tradeoff between packet arrival rate versus the uncertainties of the system dynamics. We show that the minimum packet arrival rate and the maximum uncertainty of the system dynamics have a positive correlation. Four distinct control schemes are explored and serve as examples to study this tradeoff. We derive sufficient condition for each scheme to ensure almost sure stability of the closed loop system. Simulation and examples are provided to assist the theory. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Output‐feedback ℋ︁2/ℋ︁∞control of a class of networked fault tolerant control systems
Authors: Aberkane S. , Ponsart J. C. , Sauter D. 
Published: May 2008

AbstractThis paper deals with static output feedback control of a class of discrete‐time networked control systems (NCS) subject to random failures and random delays. The different random processes are modeled as Markovian chains, and the resulting closed‐loop system belongs to the class of discrete‐time Markovian jump linear systems (MJLS). The main contribution is to formulate conditions for multi‐performance design related to this class of stochastic hybrid systems. The specifications and objectives under consideration include stochastic stability, ℋ︁2and ℋ︁∞performances. Results are formulated as matrix inequalities. A numerical algorithm is provided and its running is illustrated on a numerical example. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Analysis and applications of the motion message estimator for network control systems
Authors: Hsieh Chen‐Chou , Hsu Pau‐Lo 
Published: May 2008

AbstractThe time‐delay effect in network systems is unavoidable because of its limited transmission bandwidth. In real‐time network control systems (NCS), all messages are required to be transmitted or received to meet specifications of the deadline. Therefore, the data dropout may thus occur in NCS due to its time delay in a stochastic nature. In this paper, a motion message estimator is proposed to construct a real‐time motion NCS to significantly reduce the data‐dropout effect. Both simulation and experimental results indicate that a 3rd‐order message estimator based on the Taylor expansion can be properly implemented in NCS for industrial motion control systems. Furthermore, since the uncertainties of the NCS estimator are greatly suppressed by applying the message, experimental results indicate that its integration with the feedforward control leads to significantly improved accuracy for the NCS implemented on an industrial computerized numerical control (CNC) machine tool. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Controller design for flow networks of switched servers with setup times: The Kumar‐Seidman case as an illustrative example
Authors: Lefeber Erjen , Rooda J. E. 
Published: May 2008

AbstractIn this paper we consider the control of a reentrant manufacturing system with setup times, as introduced by Kumar and Seidman. In most literature on control of a network of servers with setup times, first a policy is introduced and then the resulting network behavior is analyzed. In manufacturing systems the network typically is fixed and givena priori. Furthermore, optimal steady state behavior is desired. Therefore, this paper follows a different approach. First optimal steady state network behavior is determined, then a feedback controller is presented which makes the network converge towards this desired steady state behavior. The resulting controller is a non‐distributed controller: each server needs global state information. For a manufacturing system this is not a problem, since global information typically is available. Finally it is shown that a distributed controller (each server needs only local state information) can also be used to achieve the same result. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Fault tolerant control of feedback linearizable systems with stuck actuators
Authors: Wang Min , Zhou Donghua 
Published: May 2008

AbstractFault tolerant control of feedback linearizable systems with stuck actuators is studied in this paper. Once stuck, the faulty actuators cannot respond to the control inputs and have fixed constant outputs. The fault considered here is severe in the sense that the faulty system is no longer feedback linearizable. By constructing a nonlinear transformation and extending Chen's disturbance observer to a multi‐dimensional case, a generalized disturbance observer is developed for estimating the unknown constant outputs of the faulty actuators. Then, through integrating the generalized disturbance observer with a controller constructed by the famous cascade design method, a fault tolerant controller is obtained. It is proven that the fault tolerant controller ensures not only boundedness of the state of the faulty system but also satisfactory output performance. Finally, computer simulations are done using an inverted pendulum model to verify the effectiveness of the proposed method. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
Optimal genetic and adaptive fuzzy washout filter design in the motion‐cueing simulator
Authors: Hwang Thong‐Shing , Kuo Ming‐Sung , Hsieh Sheng‐Ping 
Published: May 2008

AbstractThis paper has improved the simulation fidelity of a motion‐cueing simulator within a limited working space by using the optimal genetic algorithm and an adaptive fuzzy algorithm in the washout filter design, especially, in solving the real‐time parameter auto‐tuning problem. The optimal parameters of the washout filter have been searched out globally by the genetic algorithm. The fuzzy inference methodology is adopted to solve the real‐time auto‐tuning problem of the motion‐cueing parameters in the coordinate adaptive washout filter design according to the varying frequency of the dynamic input signal and the attitude of the upper platform within a limited working space.The simulation results have demonstrated that the sensing error values of otolith and semicircular canal have been suppressed below one threshold unit and the displacement has been controlled within the working space of the simulator. Copyright © 2008 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society
NTD prevalences in central California before and after folic acid fortification
Authors: Chen Brian H. , Carmichael Suzan L. , Selvin Steve , Abrams Barbara , Shaw Gary M. 
Published: May 2008

AbstractBACKGROUND: In many regions, NTD prevalences were already declining prior to folic acid fortification. This study examined whether the declining prefortification (1989–1996) NTD prevalences continued into the postfortification period (1998–2003) in selected California counties. METHODS: This population‐based study used vital statistics data and birth defects registry data that were actively ascertained from medical records. The study population included all live births and stillbirths delivered in central California counties from 1989 to 2003. Cases included deliveries with NTDs during the same time period. RESULTS: For all NTDs combined, the slopes indicated that NTD prevalence was decreasing by 7.5 (slope: −7.5; 95% CI: −12.4, −2.5) cases per 100,000 deliveries per year before fortification, whereas NTD prevalence was no longer decreasing after fortification. Comparison of the difference in the two slopes indicated that the postfortification slope exceeded the prefortification slope by 12.6 (95% CI: 2.6, 22.6) cases per 100,000 deliveries per year. CONCLUSIONS: Annual NTD prevalences in central California did not continue to decrease after implementation of folic acid fortification. Birth Defects Research (Part A) 2008. © 2008 Wiley‐Liss, Inc.
Evaluation of preterm births and birth defects in liveborn infants of US military women who received smallpox vaccine
Authors: Ryan Margaret A. K. , Gumbs Gia R. , Conlin Ava Marie S. , Sevick Carter J. , Jacobson Isabel G. , Snell Katherine J. , Spooner Christina N. , Smith Tyler C. ,   for the Department of Defense Birth and Infant Health Registry Team
Published: May 2008

AbstractBACKGROUND: Women serving in the US military have some unique occupational exposures, including exposure to vaccinations that are rarely required in civilian professions. When vaccinations are inadvertently given during pregnancy, such exposures raise special concerns. These analyses address health outcomes, particularly preterm births and birth defects, among infants who appear to have been exposed to maternal smallpox vaccination in pregnancy. METHODS: This retrospective cohort study included 31,420 infants born to active‐duty military women during 2003–2004. We used Department of Defense databases to define maternal vaccination and infant health outcomes. Multivariable regression models were developed to describe associations between maternal smallpox vaccination and preterm births and birth defects in liveborn infants. RESULTS: There were 7,735 infants identified as born to women ever vaccinated against smallpox, and 672 infants born to women vaccinated in the first trimester of pregnancy. In multivariable modeling, maternal smallpox vaccination in pregnancy was not associated with preterm or extreme preterm delivery. Maternal smallpox vaccination in the first trimester of pregnancy was not significantly associated with overall birth defects (OR 1.40; 95% CI: 0.94, 2.07), or any of seven specific defects individually modeled. CONCLUSIONS: Results may be reassuring that smallpox vaccine, when inadvertently administered to pregnant women, is not associated with preterm delivery or birth defects in liveborn infants. Birth Defects Research (Part A) 2008. © 2008 Wiley‐Liss, Inc.
Living related liver transplantation in children
Authors: Heaton N , Faraj W , Melendez H Vilca , Jassem W , Muiesan P , Mieli-Vergani G , Dhawan A , Rela M 
Published: May 2008

Abstract

Background
Living related liver transplantation (LRLT) has become established for treating children with end-stage liver disease. The aim of this study was to review a single-centre experience of left lateral segment liver transplants from living donors in children.

Methods
Fifty left lateral segment LRLT procedures have been performed since 1993. There were 17 girls and 33 boys, of median age 1·5 years (range 0·5 to 13 years), with a median weight of 10 (range 0·7–44) kg. Donors included 23 mothers, 26 fathers and one uncle, with a median age of 33 (range 19–46) years.

Results
At a median follow-up of 86 months, there was no donor mortality and low morbidity. Patient and graft survival rates were 98, 96 and 96 per cent, and 98, 96 and 93 per cent at 1, 3 and 5 years respectively. Three children had a second transplant at a median of 9 years after the first. The incidence of hepatic artery thrombosis, portal vein thrombosis and biliary complications was 6, 4 and 14 per cent respectively.

Conclusion
Living related liver transplantation has good long-term results in children.
Quality of life after liver resection for hepatobiliary malignancies
Authors: Dasgupta D , Smith A B , Hamilton-Burke W , Prasad K R , Toogood G J , Velikova G , Lodge J P A 
Published: May 2008

Abstract

Background
Few prospective longitudinal studies have used a validated quality of life (QOL) instrument in patients undergoing liver resection for hepatobiliary malignancy.

Methods
Patients undergoing liver resection for hepatobiliary tumours in a 1-year period were enrolled. The cancer-specific European Organization for Research and Treatment of Cancer core questionnaire (EORTC QLQ-C30) was completed before operation, and at 6, 12 and 36–48 months after surgery. QOL over time was analysed in relation to several clinical factors.

Results
A total of 103 patients were enrolled. Patient compliance was at least 75 per cent at all stages. Most functional scales and the global QOL scale showed a non-significant trend towards deterioration at 6 months and a return to preoperative level at 12 months. Physical functioning and dyspnoea deteriorated significantly at 6 months (P = 0·020 and P = 0·004 respectively) and did not recover by 12 months (P = 0·002 and P &lt; 0·001 respectively). Pain and fatigue showed clinically significant deterioration over 12 months, which was not statistically significant. Survivors without recurrence at 36–48 months showed better QOL than those with recurrent disease.

Conclusion
Major liver resection is associated with acceptable QOL outcomes, and QOL continues to improve in the long term in those without recurrence.
Ileal pouch–anal anastomosis and liver transplantation for ulcerative colitis complicated by primary sclerosing cholangitis
Authors: Mathis K L , Dozois E J , Larson D W , Cima R R , Sarmiento J M , Wolff B G , Heimbach J K , Pemberton J H 
Published: May 2008

Abstract

Background
The aim was to evaluate outcomes in patients with ulcerative colitis complicated by primary sclerosing cholangitis (PSC) who required ileal pouch–anal anastomosis (IPAA) and orthotopic liver transplantation (OLT).

Methods
A retrospective analysis was performed of 32 patients undergoing both IPAA and OLT between 1980 and 2006. Data were collected regarding demographics, indication for surgery, postoperative complications, and outcome of IPAA and OLT.

Results
Thirty-day mortality after either procedure was nil. The median preoperative Model for End-stage Liver Disease (MELD) score for the group with initial IPAA was 8 (range 6–20) and the postoperative score was 11 (range 6–19). At 1 and 10 years, 32 and 26 of the 32 liver grafts had survived, and 31 and 30 of the 32 pouches, respectively. Fourteen patients require daily medical therapy for chronic pouchitis. At a median follow-up of 3·6 (range 0·2–16·2) years after the second of two procedures, responding patients reported a median of 5·5 stools per day and 2 stools per night.

Conclusion
IPAA and OLT are feasible and safe in patients requiring both procedures for ulcerative colitis and PSC. Functional outcomes are stable over time, despite an increased risk of chronic pouchitis.
High‐Strength Cellulose/Poly(ethylene glycol) Gels
Authors: Liang Songmiao , Wu Junjie , Tian Huafeng , Zhang Lina , Xu Jian 
Published: May 2008

AbstractCellulose gel membranes have been prepared by a pre‐gelation method employing cellulose solutions in aqueous NaOH–thiourea obtained at low temperature. The cellulose gels were then swollen by low‐molecular‐weight polyethylene glycol (PEG; MW<1000 g mol−1), and the morphology, structure and mechanical properties of the cellulose/PEG gels were studied by various techniques. The gels exhibit high mechanical performance, and the tensile strength of the gel membranes increases sharply with an increase in the molecular weight of PEG from 200 to 800 g mol−1. Moreover, their elongation at break remains stable at 100 %. PEG800 efficiently improves the optical transmittance of the gel membranes at ambient temperature, which is about five times greater than that of a normal cellulose hydrogel membrane. A strong hydrogen‐bonding interaction occurs between PEG and cellulose leading to a homogeneous structure, high mechanical strength and good transparency of the gel membranes.
A long‐term flow cytometry assay to analyze the role of specific genes of Drosophila melanogaster S2 cells in surviving genotoxic stress
Authors: Yi Xia , Lemstra Willy , Vos Michel J. , Shang Yongfeng , Kampinga Harm H. , Su Tin Tin , Sibon Ody C. M. 
Published: May 2008

AbstractDrosophila S2 cells are easy to manipulate and culture and are a versatile model system for high‐throughput screens such as genome‐wide siRNA screens to find genes involved in stress or therapy resistance or for screening through large compound libraries to identify cytotoxins. Clonogenic assays are considered the gold‐standard to investigate the cytotoxicity of specific treatments or to compare the sensitivity of various cell types for a specific treatment. However, this assay cannot be used for Drosophila S2 cells as they are virtually unable to grow in distinct colonies. We designed a novel fluorescence‐based flow cytometry assay to study long‐term proliferation of S2 cells under various conditions and in the presence of specific gene products or after downregulation of specific gene products. Here we validate this assay and we used this novel method to investigate the role of checkpoint genes grapes/Dchk1 and DmChk2 in cell survival responses. Our data demonstrate that Grapes/Dchk1 but not DmChk2 is required to survive hydroxyurea. Our assay will be of use to investigate the long‐term effects of various treatments in S2 cells and to evaluate the role of specific proteins therein. © 2008 International Society for Advancement of Cytometry
Enhanced FRET contrast in lifetime imaging
Authors: Spriet Corentin , Trinel Dave , Riquet Franck , Vandenbunder Bernard , Usson Yves , Heliot Laurent 
Published: May 2008

AbstractIn combination with two photon excitation, FLIM is currently one of the best techniques to quantitatively study the subcellular localization of protein–protein interactions in living cells. An appropriate analysis procedure is crucial to obtain reliable results. TCSPC is an accurate method to measure FLIM. It is however an indirect process that requires photon decay curve fitting, using an exponential decay equation. Although choosing the number of exponential terms is essential, it is labor‐intensive and time consuming. Therefore, a mono‐model is usually applied to a whole image. Here we propose an algorithm, named Liχ, allowing pixel by pixel analysis based on the Δχ2 value. Liχ was validated using simulated photon decay curves with known lifetimes and proportions. It showed a high robustness for decay curves with more than 103 photons. When applied to lifetime images acquired from living cells, it resulted in a more realistic representation of the interaction maps. We developed an easy‐to‐use procedure for multi‐model FLIM analysis, which enables optimized FRET quantification for all interaction texture studies, and is especially suitable to avoid the classical misinterpretation of heterogeneous samples. © 2008 International Society for Advancement of Cytometry
On the error probability of quasi‐orthogonal space–time block codes
Authors: Yang Jae‐Dong , Jin Xianglan , No Jong‐Seon , Shin Dong‐Joon 
Published: May 2008

AbstractIn this paper, we derive the exact pairwise error probabilities (PEPs) of various quasi‐orthogonal space–time block codes (QO‐STBCs) using the moment generating function. By classifying the exact PEPs of QO‐STBCs into three types, we derive the closed‐form expression for each type of PEP. Based on these closed‐form expressions, we obtain the union bounds on the symbol error probability and bit error probability for QPSK modulation. Through simulation, it is shown that these union bounds are quite tight. Copyright © 2008 John Wiley & Sons, Ltd.
Reactivity of Phosphane–Imidazolium Salts Towards [Ir(COD)Cl]2: Preparation of New Hydridoiridium(III) Complexes Bearing Abnormal Carbenes
Authors: Wolf Joffrey , Labande Agnès , Daran Jean‐Claude , Poli Rinaldo 
Published: May 2008

AbstractThe unusual reactivity of chelating phosphane–imidazolium salts MesImEtPPh2+Br–, DIPP‐ImEtPPh2+Br–, and MesImEtPPh2+BF4– towards the low‐oxidation‐state iridium complex [Ir(COD)(μ‐Cl)]2 was studied. In the absence of a base, the C–H insertion at the C5 position of the imidazolium ring was the only reaction that occurred, with no normal NHC observed, leading to hydridoiridium(III) complexes. This reactivity was independent of the nature of the imidazolium counteranion and of the substitution pattern of the aryl group. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Quenching the Hysteresis in Single Crystals of a 1D Chain Iron(II) Spin Crossover Complex
Authors: Weber Birgit , Kaps Eike S. , Desplanches Cédric , Létard Jean‐François 
Published: May 2008

AbstractThe unusual grinding effects observed in the 1D spin crossover polymer [FeL(bipy)]n (1), with L being a tetradentate N2O22– coordinating Schiff base type ligand {(3,3′)‐[1,2‐phenylenebis(iminomethylidyne)]bis(2,4‐pentanedionato)(2–)‐N,N′,O2,O2′} and bipy = 4,4′‐bipyridine, are investigated using magnetic measurements, X‐ray powder diffraction and optical reflectivity studies. The observed behaviour can be explained when solvent effects are taken into account. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Cobalt‐Induced Synthesis of 6‐(Pyridin‐2‐yl)purines by Microwave‐Enhanced [2+2+2] Cyclotrimerization
Authors: Turek Pavel , Hocek Michal , Pohl Radek , Klepetářová Blanka , Kotora Martin 
Published: May 2008

AbstractA novel, efficient, and atom‐economic methodology for the preparation of a large series of diversely substituted (pyridin‐2‐yl)purines has been developed. Thus, microwave‐enhanced [2+2+2] cyclotrimerization of 6‐(diynyl)purines with nitriles in the presence of a stoichiometric or catalytic amount of [CpCo(CO)2] afforded the corresponding products in good yields. The reactions carried out with various alkyl, aryl, and heteroaryl cyanides poceeded with exclusive regioselectivity, affording 6‐(pyridin‐2‐yl)purines. In an analogous manner, [2+2+2] cyclotrimerizations of 1,8‐bis(purinyl)‐1,7‐octadiynes with nitriles were conducted, yielding 1,4‐bis(purin‐6‐yl)‐5,6,7,8‐tetrahydroisoquinolines. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Determination of amino acids by capillary electrophoresis‐electrospray ionization‐mass spectrometry: An evaluation of different protein hydrolysis procedures
Authors: Simionato Ana V. Colnaghi , Moraes Edgar Perin , Carrilho Emanuel , Tavares Marina Franco Maggi , Kenndler Ernst 
Published: May 2008

AbstractIn this work, a CE equipment, online hyphenated to an IT MS analyzer by a linear sheath liquid interface promoting ESI, was used to develop a method for quantitative determination of amino acids. Under appropriate conditions (BGE composition, 0.8% HCOOH, 20% CH3OH; sheath liquid composition, 0.8% HCOOH, 60% methanol; VESI, +4.50 kV), analytical curves of all amino acids from 3 to 80 mg/L were recorded presenting acceptable linearity (r >0.99). LODs in the range of 16–172 μmol/L were obtained. BSA, a model protein, was submitted to different hydrolysis procedures (classical acid and basic, and catalyzed by the H+ form of a cation exchanger resin) and its amino acid profiles determined. In general, the resin‐mediated hydrolysis yields were overall similar or better than those obtained by classical acid or basic hydrolysis. The resulting experimental‐to‐theoretical BSA concentration ratios served as correction factors for the quantitation of amino acids in Brazil nut resin generated hydrolysates.