bluuebunny/crossref_metadata_2025_split huggingface dataset:
Transaortic transcatheter aortic valve implantation: A novel approach for the truly “no‐access option” patients
Authors: Latsios George , Gerckens Ulrich , Grube Eberhard 
Published: November 2009

AbstractObjectives: The aim of this study was to test the safety and efficacy of the retrograde, minimally invasive, “transaortic” approach of transcatheter aortic valve implantation (TAVI) using the Medtronic CoreValve prosthesis (Medtronic, Minneapolis) as an alternative minimally invasive surgical access route. Background: TAVI is today recognized as an established percutaneous technique for patients with severe aortic valve stenosis (AS). However, as the number of patients screened for TAVI increases, many are found with absolutely no option for peripheral artery access. Methods: A new method of TAVI access, described as “transaortic” was performed in two patients A CoreValve prosthesis was implanted via the “transaortic” route. The patients were a 93‐ and a 84‐year‐old woman, both with severe PAOD. After a ministernotomy the ascending aorta was directly punctured. At the end, the access site was surgically sutured with the prepositioned sutures. The patients were at all times “off‐pump” (beating heart procedure) and without IABP. Results: TAVI was successful in both cases, leading to a fall in the transvalvular gradient and there were no cases of mortality, stroke or myocardial infarction. The patients were extubated directly after the procedure, mobilized after 4 days, and were discharged home after 7 and 9 days. Conclusions: In the rare occasion, where due to anatomical reasons transfemoral TAVI is not feasible, a minimally invasive “transaortic” approach, as described, provides an alternative option. This is especially true when the transapical route is not suitable (annulus >25 mm or contraindication to lateral thoracotomy). © 2010 Wiley‐Liss, Inc.
Percutaneous coronary intervention using a virtual 3‐Fr guiding catheter
Authors: Mizuno Shingo , Takeshita Satoshi , Taketani Yoshio , Saito Shigeru 
Published: November 2009

AbstractBackground: We have recently reported a novel percutaneous coronary intervention (PCI) system using a hydrophilic‐coated sheathless guiding catheter (Virtual 3‐Fr, Medikit, Tokyo, Japan), which provides us with less invasive angioplasty and a puncture site injury equivalent to a conventional 3‐Fr introducer sheath. Here, we report the initial results of PCI using this novel system. Methods: A total of 36 coronary artery lesions of 27 patients were treated by using a virtual 3‐Fr PCI system. Procedural outcomes of virtual 3‐Fr PCI were retrospectively evaluated. Results: The mean age was 73.0 ± 8.7 years (range, 46–84 years), and 15 were men (56%). Access sites included the radial artery in 18 patients (67%), the brachial artery in eight patients (30%), and the femoral artery in 1 patients (4%). Among 36 lesions, seven were chronic total occlusions, and a virtual 3‐Fr PCI was successful in 33 lesions (92%). Among the successfully treated 33 lesions, coronary stents were deployed in 32 (97%), and intravascular ultrasound examination was performed in 19 (58%). Hemostasis was achieved immediately after PCIs in all cases. No access‐site related complications including radial artery occlusion were observed. Conclusions: The performance of a virtual 3‐Fr PCI system appears to be comparable to one using a regular 5‐Fr guiding catheter while the puncture‐site damage remains equivalent to that of a 3‐Fr introducer sheath. Virtual 3‐Fr PCI may have a potential to serve as a minimally invasive strategy for the treatment of coronary artery diseases. © 2010 Wiley‐Liss, Inc.
Safety of drug eluting stents in patients on chronic anticoagulation using long‐term single antiplatelet treatment with clopidogrel
Authors: Pasceri Vincenzo , Patti Giuseppe , Pristipino Christian , Pelliccia Francesco , Irini Diego , Varveri Antonio , Roncella Adriana , Di Sciascio Germano , Speciale Giulio 
Published: November 2009

AbstractBackground: Use of triple therapy with aspirin, clopidogrel, and anticoagulants significantly increases bleeding, thus drug eluting stents (DES) are usually avoided in patients requiring anticoagulation. We tested use of DES vs. BMS using a long‐term therapy with clopidogrel only and anticoagulants in this group of patients. Methods: We enrolled 165 consecutive patients, 79 receiving DES (age 67 ± 9 years, 84% with atrial fibrillation) and 86 receiving bare metal stents (BMS) (age 70 ± 11 years, 71% with atrial fibrillation). All patients received aspirin + clopidogrel + oral anticoagulants for 4 weeks, then aspirin was stopped and clopidogrel was continued during the 12‐month follow‐up. Primary end point was the combined incidence of major adverse coronary events and major bleedings. Results: Incidence of the primary endpoint was 10.1% in patients with DES and 26.7% in patients with BMS (P = 0.01). There was a large difference in incidence of target vessel revascularization (8.1% for DES, 23.3% for BMS, P = 0.01), whereas incidence of myocardial infarction (3.8% in DES vs. 8.1% in BMS) and major bleeding (1.3% vs. 2.3%, respectively) were not significantly different. There were no cases of stent thrombosis. On multivariate Cox regression analysis, the only factor associated with a reduced risk of the primary endpoint was use of DES (hazard ratio 0.35 with 95% confidence interval 0.14–0.85, P = 0.02). Conclusions: Results of our cohort study suggest that use of DES associated with a treatment with clopidogrel only may be safe and significantly reduce the need for new revascularization in patients requiring chronic anticoagulation.© 2009 Wiley‐Liss, Inc.
Use of trellis thrombectomy system in acute aortofemoral graft occlusion
Authors: Hanna Elias B. , Gupta Raghav , Hennebry Thomas A. 
Published: November 2009

AbstractAcute aortofemoral graft occlusion is often effectively treated with endovascular therapy but a substantial proportion of patients experience failure or complications of this therapy, and most of them require definitive surgery for the underlying inflow, outflow, or graft disease. We describe a case of an aortofemoral graft occlusion that was successfully treated with the Trellis thrombectomy–thrombolysis system (Covidien, Dublin, Ireland). Subsequent stenting of the graft obviated the need for a definitive graft revision surgery. The Trellis system combines mechanical and local pharmacologic lysis of the thrombus, with more rapid and more effective thrombus dissolution and theoretically less risk of systemic dispersion of the thrombolytic agent and less bleeding. © 2009 Wiley‐Liss, Inc.
In situ Monitoring of Coke Deposits during Coking and Regeneration of Solid Catalysts by Electrical Impedance‐based Sensors
Authors: Müller N. , Moos R. , Jess A. 
Published: November 2009

AbstractThe activity of solid catalysts is often substantially reduced by the formation of coke. The in situ monitoring of the coke load of catalyst particles could therefore be a controlling instrument of high value. Such sensors could be useful to measure the axial coke profile in a fixed bed reactor, both during coke formation and regeneration by coke burn‐off. As a contribution to the development of such sensors, single particles of an alumina oxide catalyst were used as a model system. The particles were electrically contacted and characterized by electrical impedance spectroscopy. The coke formation/burn‐off and the impedance were simultaneously measured in a magnetic suspension balance. A clear relationship between the coke loading and the respective electrical impedance signal could be observed, both during coke formation and during the regeneration by coke burn‐off. Kinetic studies were conducted to verify the influence of mass transfer limitations on the impedance signal.
A chemometric approach to the environmental problem of predicting toxicity in contaminated sediments
Authors: Alvarez‐Guerra Manuel , Ballabio Davide , Amigo José Manuel , Viguri Javier R. , Bro Rasmus 
Published: November 2009

AbstractSediments can act as sinks of multiple chemicals that accumulate over time and could represent a potentially significant hazard to the ecosystem and human health. The assessment of sediment quality, which is a complex task, usually involves, in its initial steps, the measurement of sediment contamination, followed by tests for assessing toxicity. This work presents a chemometric approach to tackle the challenging issue of linking concentrations of chemicals to the potential for observing toxicity in sediments. Various methods were applied to large databases of field‐collected chemical and biological effects data, including linear and quadratic discriminant analysis (LDA and QDA), partial least squares‐discriminant analysis (PLS‐DA), extended canonical variates analysis (ECVA), classification and regression trees (CART) and counter‐propagation artificial neural networks (CP‐ANN). LDA, QDA, PLS‐DA and ECVA showed very similar and satisfactory performances, but the best results were obtained with CP‐ANNs and CART. In any case, the developed models for predicting toxicity improved the classification performance compared to previous approaches, giving non‐error rates (NERs) in the range of 76.0–97.4. Moreover, the exploration of the internal structure of the models, jointly with the application of variable selection techniques, allowed the study of the importance of the 16 chemical contaminants considered, emphasizing Cu, followed by Zn, as the most discriminating variables for predicting toxicity in the developed models. Copyright © 2009 John Wiley & Sons, Ltd.
Preterm labour and clinical hypnosis
Authors: Reinhard Joscha , Huesken‐Janßen Helga , Hatzmann Hendrike , Schiermeier Sven 
Published: November 2009

AbstractHypnosis may play an important role in reducing preterm labour for patients who have higher levels of psychosocial stress. This study examines the rate of late‐preterm birth in a hypnosis group (directed to all women) and a historical control group. From July 2007 all women (n = 64), who were in their 28th to 34th weeks' gestation, were offered self‐hypnosis training using the hypnoreflexogenous protocol after Hüsken‐Janßen and Schauble. Expectant mothers with uncertain anticipated days of delivery were excluded. All women who delivered after 31 weeks' gestation served as a control group (n = 2135) from January 2006 till June 2007. In the hypnosis group there were three preterm deliveries (4.7%) (before 37 + 0 weeks' gestation) whereas in the control group there were 220 preterm deliveries (10.3%) (p = 0.01). Average cigarette usage during the current pregnancy was lower in the hypnosis group (p = 0.02). Higher work‐educated employments (p = 0.01), higher age of the mother (p < 0.001) and fewer previous pregnancies (p < 0.03) were found in the hypnosis group. Preterm birth correlated with the number of previous pregnancies (−0.38; p < 0.001) but not with smoking. Hypnosis was shown to be effective therapy without side‐effects, which can reduce preterm delivery. This clinical study showed a significant prevention of preterm delivery. Prospective randomized controlled studies are required to evaluate fully the preventive value of clinical hypnosis. Copyright © 2009 British Society of Experimental & Clinical Hypnosis. Published by John Wiley & Sons, Ltd.
Spiritual‐transpersonal hypnosis
Authors: Zahi Arnon 
Published: November 2009

AbstractThe field of spiritual and transpersonal psychotherapy and hypnotherapy can be divided into three major categories: research of near‐death and out‐of‐body experiences; past life experiences; and spiritual interpretations in accordance with the patient's beliefs. The present article suggests a fourth category, spiritual interpretations not in accordance with the patient's beliefs. Three cases are reported, and the curative force of the interpretations is discussed. Copyright © 2009 British Society of Experimental & Clinical Hypnosis. Published by John Wiley & Sons, Ltd.
Alternatives Verfahren zur Racemattrennung verbindungsbildender Systeme mittels Kristallisation
Authors: Kaemmerer H. , Seidel‐Morgenstern A. , Lorenz H. 
Published: November 2009

AbstractVielfach sind Strategien zur optimierten Verschaltung von Methoden zur Racematspaltung vorgestellt worden. Diese kombinieren chirale Selektoren, etwa chromatographische Trennsäulen oder chirale Membranen, mit einer nachgeschalteten selektiven Kristallisation. Eine effektive Schnittstelle beider Trennverfahren ist über die eutektische Zusammensetzung des chiralen Systems definiert und der Grad der Synergie somit substanzspezifisch. In diesem Beitrag wird ein alternatives Trennverfahren vorgestellt, das diese Limitierung nicht aufweist und geeignet ist, aus beliebig angereicherten Lösungen das Zielenantiomer selektiv auszukristallisieren. Hierbei wird die Verschiebung der eutektischen Zusammensetzung in Lösung, analog einer Azeotropdestillation, gezielt zur Trennung einer Mischung von Enantiomeren ausgenutzt. Anhand eines experimentellen Beispiels wird gezeigt, dass sich mittels einer zyklischen Fahrweise die Ausbeute pro Kristallisationsbatch deutlich steigern lässt.
Steam methane reforming in a Ni/Al2O3 catalyst: Kinetics and diffusional limitations in extrudates
Authors: Oliveira Eduardo L. G. , Grande Carlos A. , Rodrigues Alírio E. 
Published: November 2009

AbstractThe true kinetics of methane steam reforming was measured in powder of Ni/Al2O3 catalyst (“Octolyst 1001” from Degussa) at different temperatures (733–890 K) for several operating conditions. New reaction rate constants were determined for this catalyst. The observed reaction rate was measured on catalyst extrudates to determine diffusion effects within the porous structure of the particle. A non‐isothermal model with diffusion was used to determine effectiveness factors for each reaction. The objective was to measure all necessary data to model the performance of the catalyst in a Sorption Enhanced Reaction Process (SERP) for H2 production with in situ CO2 capture.
A novel equation of state (EOS) for prediction of solute solubility in supercritical carbon dioxide: Experimental determination and correlation
Authors: Nejad Sh. Jafari , Mohammadikhah R. , Abolghasemi H. , Moosavian M. A. , Maragheh M. G. 
Published: November 2009

AbstractSolubility data of organophosphorous metal extractants in supercritical fluids (SCF) are crucial for designing metal extraction processes. We have developed a new equation of state (EOS) based on virial equation including an untypical parameter as BP/RT, reduced temperature and pressure for prediction of solute solubility in supercritical carbon dioxide (SC CO2). Solubility experimental data (solubility of tributylphosphate in SC CO2) were correlated with the two cubic equations of state (EOS) models, namely the Peng–Robinson EOS (PR‐EOS) and the Soave–Redlich–Kwong EOS (SRK‐EOS), together with two adjustable parameter van der Waals mixing and combining rules and our proposed EOS. The AARD of our EOS is significantly lower than that obtained from the other EOS models. The proposed EOS presented more accurate correlation for solubility data in SC CO2. It can be employed to speed up the process of SCF applications in industry.
Electric‐oxidation kinetics of molybdenite concentrate in acidic NaCl solution
Authors: Zhan‐fang Cao , Hong Zhong , Guang‐yi Liu , Jian‐gang Fu , Shuai Wang , Yun‐ren Qiu 
Published: November 2009

AbstractThe electric‐oxidation kinetics of molybdenite concentrate in NaCl electrolyte was investigated in this study. The effects of liquid‐to‐solid ratio, stirring speed, and concentration of NaCl on the dissolution rate were determined. It was found that the dissolution rate increases with increase in liquid‐to‐solid ratio, stirring speed, and concentration of NaCl. A shrinking particle model is presented to describe the dissolution and to analyse the data. The apparent activation energy of this dissolution process was found to be 8.2 kJ/mol; it was established that the leaching process is mainly controlled by diffusion, and the kinetics formula of this research system can be expressed as: $k = 0.0207{\rm C}_{{\rm NaCl}}^{1.04} {\rm exp}( - 8200/RT)$.
Absorption of ethylene from ethylene‐ethane gaseous mixture by AgNO3 solution in a semi‐continuous process
Authors: Mortaheb H. R. , Mafi M. , Zolfaghari A. , Mokhtarani B. , Khodapanah N. , Ghaemmaghami F. 
Published: November 2009

AbstractEthylene absorption from an ethylene–ethane gaseous mixture in the silver nitrate solution is studied at different temperatures and concentrations. Unlike the previous studies, in which the absorption was studied by batch processes, a semi‐continuous process is applied in the present research. The results show that increase in temperature reduces the amount of absorbed ethylene and absorption time. The amount of absorbed ethylene is increased in solutions with higher concentrations of AgNO3, whereas the mole ratio of absorbed ethylene per silver nitrate is decreased by increasing the AgNO3 concentration. Total absorption is modelled as a function of the temperature and concentration of absorbing solution. The estimated values from the model are in good agreement with the experimental data.
A new efficient technique for finding the solution of initial‐value problems using He's variational iteration method
Authors: Tatari Mehdi 
Published: November 2009

AbstractThe well‐known He's variational iteration method has been implemented by researchers for solving various kinds of problems. Although it is a very efficient method for solving problems, the approximation is not accurate in large regions. In this work a new technique based on the successive use of the He's variational iteration method in smaller regions has been presented. The new method has been named as local He's variational iteration method. By applying the new technique, an accurate approximation provided in large domains in a shorter time and less computations. Copyright © 2009 John Wiley & Sons, Ltd.
Improving understanding, learning, and performances of novices in dynamic managerial simulation games
Authors: Yasarcan Hakan 
Published: November 2009

AbstractSimulations are increasingly used in training and education because of their success and their advantages as a learning method. However, it has also been observed that the dynamic complexity of simulations creates learning difficulties, and that performance tends to plateau quickly at a level well below benchmark performance. To overcome this difficulty, a gradual‐increase‐in‐complexity approach is proposed, which suggests developing simpler versions of a simulation game that can be used as part of the training. Accordingly, the authors developed a series of inventory‐management simulations and conducted an experiment. The results indicate an improvement in the success of the inventory‐management simulation as a training tool. © 2009 Wiley Periodicals, Inc. Complexity, 2010
Toward a semantic general theory of everything
Authors: Samsonovich Alexei V. , Goldin Rebecca F. , Ascoli Giorgio A. 
Published: November 2009

AbstractThe notion of a universal semantic cognitive map is introduced as a general indexing space for semantics, useful to reduce semantic relations to geometric and topological relations. As a first step in designing the concept, the notion of semantics is operationalized in terms of human subjective experience and is related to the concept of spatial position. Then synonymy and antonymy are introduced in geometrical terms. Further analysis building on previous studies of the authors indicates that the universal semantic cognitive map should be locally low‐dimensional. This essay ends with a proposal to develop a metric system for subjective experiences based on the outlined approach. We conclude that a computationally defined universal semantic cognitive map is a necessary tool for the emerging new science of the mind: a scientific paradigm that includes subjective experience as an object of study. © 2009 Wiley Periodicals, Inc. Complexity, 2010
Collective increase of first impression bias
Authors: Deffuant Guillaume , Huet Sylvie 
Published: November 2009

AbstractWe propose a simple model of first impression bias (FIB), where agents tend to ignore features which contradict their initial view. We consider a population of agents which are all in contact with a media, communicating randomly chosen features of an object. In some cases, we observe on simulations that FIB is significantly more frequent when the agents interact with each other than when they are only in contact with the media. We design an analytical aggregated model of the global agent‐based model behavior, which helps to explain the higher number of FIB due to the interactions. © 2009 Wiley Periodicals, Inc. Complexity, 2010
A genetic algorithm with local search strategy for improved detection of community structure
Authors: Li Shuzhuo , Chen Yinghui , Du Haifeng , Feldman Marcus W. 
Published: November 2009

AbstractOn the basis of modularity optimization, a genetic algorithm is proposed to detect community structure in networks by defining a local search operator. The local search operator emphasizes two features: one is that the connected nodes in a network should be located in the same community, while the other is “local selection” inspired by the mechanisms of efficient message delivery underlying the small‐world phenomenon. The results of community detection for some classic networks, such as Ucinet and Pajek networks, indicate that our algorithm achieves better community structure than other methodologies based on modularity optimization, such as the algorithms based on betweenness analysis, simulated annealing, or Tasgin and Bingol's genetic algorithm. © 2009 Wiley Periodicals, Inc. Complexity, 2010
Design and implementation of ARIP for efficient handovers
Authors: Kwon Dong‐Hee , Kim Yong‐Sung , Suh Young‐Joo 
Published: November 2009

AbstractMobile IPv6 (MIPv6), which is a protocol being standardized by Internet Engineering Task Force for global IP mobility support, is expected to have a key role for future All‐IP wireless networks. As the demands for delay sensitive multimedia applications increase, the handover latency and packet losses of MIPv6 become inadequate for these applications. Fast Handovers for Mobile IPv6 (FMIPv6) has been proposed to tackle the problem. However, FMIPv6 cannot work solely since it needs access router information for its fast handover operation. In this paper, we propose Access Router Information Protocol (ARIP), which performs a candidate access router discovery and a radio access network discovery in one protocol suite, to provide an efficient handover framework for MIPv6 and FMIPv6. ARIP is designed to cope with heterogeneous networks as well as homogeneous networks and to be closely coupled with FMIPv6 to provide the efficient handover performance. The performance evaluation of MIPv6, FMIPv6, and FMIPv6 with ARIP is performed in an actual network environment. The performance results show that FMIPv6 with ARIP can significantly improve the handover performance compared to the conventional handover approaches. Copyright © 2009 John Wiley & Sons, Ltd.