bluuebunny/crossref_metadata_2025_split huggingface dataset:
A 3D wavelet fusion approach for the reconstruction of isotropic‐resolution MR images from orthogonal anisotropic‐resolution scans
Authors: Aganj Iman , Lenglet Christophe , Yacoub Essa , Sapiro Guillermo , Harel Noam 
Published: July 2011

AbstractHardware constraints, scanning time limitations, patient movement, and signal‐to‐noise ratio (SNR) considerations, restrict the slice‐selection and the in‐plane resolutions of MRI differently, generally resulting in anisotropic voxels. This nonuniform sampling can be problematic, especially in image segmentation and clinical examination. To alleviate this, the acquisition is divided into (two or) three separate scans, with higher in‐plane resolutions and thick slices, yet orthogonal slice‐selection directions. In this work, a noniterative wavelet‐based approach for combining the three orthogonal scans is adopted, and its advantages compared with other existing methods, such as Fourier techniques, are discussed, including the consideration of the actual pulse response of the MRI scanner, and its lower computational complexity. Experimental results are shown on simulated and real 7 T MRI data. Magn Reson Med, 2011. © 2011 Wiley‐Liss, Inc.
A thermo‐mechanical model for variably saturated soils based on hypoplasticity
Authors: Mašín David , Khalili Nasser 
Published: July 2011

SUMMARYThe paper presents a mechanical model for non‐isothermal behaviour of unsaturated soils. The model is based on an incrementally non‐linear hypoplastic model for saturated clays and can therefore tackle the non‐linear behaviour of overconsolidated soils. A hypoplastic model for non‐isothermal behaviour of saturated soils was developed and combined with the existing hypoplastic model for unsaturated soils based on the effective stress principle. Features of the soil behaviour that are included into the model, and those that are not, are clearly distinguished. The number of model parameters is kept to a minimum, and they all have a clear physical interpretation, to facilitate the model usefulness for practical applications. The step‐by‐step procedure used for the parameter calibration is described. The model is finally evaluated using a comprehensive set of experimental data for the thermo‐mechanical behaviour of an unsaturated compacted silt. Copyright © 2011 John Wiley & Sons, Ltd.
Video‐on‐Demand (VoD) deployment over hospitality networks
Authors: Salah Khaled , Hamodi Jamil , Baig Zubair A. , Al‐Haidari Fahd 
Published: July 2011

SUMMARYVideo‐on‐Demand (VoD) deployment over existing IP networks has recently gained significant popularity. Typically, the deployment of VoD is done in an arbitrary manner, without utilizing a proper engineering approach. In this paper, we present an engineering approach to deploy VoD services over IP‐based hospitality networks, such as those networks seen in hotels and hospitals. In particular, our approach aims to determine the total number of VoD sessions that can be sustained by an existing hospitality network, while satisfying the QoS requirements of all network services, and at the same time leaving adequate capacity for future growth. We gauge the capacity of the hospitality network to sustain VoD services using both analysis and simulation. The capacity is gauged considering VoD quality of service requirements of throughput and delay constraints. Our analysis utilizes the principles of queuing theory, and our simulation is performed using OPNET simulation. Copyright © 2011 John Wiley & Sons, Ltd.
Energy‐optimal control of a particle in a dielectrophoretic system
Authors: Simha Harsha , Barve Hrushikesh A. , Banavar Ravi N. 
Published: July 2011

SUMMARYDielectrophoresis is an electrokinetics‐based phenomenon that involves the motion of a particle due to interaction between its dipole moment and an applied nonuniform electric field. This technique is very effective in particle manipulation and separation. In this paper, we consider an energy optimal transfer of a particle in a dielectrophoretic system from one specified location to another desired location. The system is described by a set of ordinary differential equations with a quadratic term in the control variable (the control being the applied voltage on the electrodes which induces the electric field), making the system nonaffine. Copyright © 2011 John Wiley & Sons, Ltd.
Perceptions of Patients and Physiotherapists on Patient Participation: A Narrative Synthesis of Qualitative Studies
Authors: Schoeb Veronika , Bürge Elisabeth 
Published: July 2011

AbstractBackground and PurposePatient participation is nowadays considered important for high quality patient care. Although the literature on health care professions provides some insights into this topic, specific aspects in the field of physiotherapy are less known. The objective of this review was to investigate how patients and physiotherapists perceive patient participation, especially in regards to what it means for them and the role patients play during physiotherapy treatment sessions.MethodsWe used a narrative synthesis of qualitative studies. We conducted a systematic search in six databases using a set of key words, extracted relevant data, performed quality assessment and synthesized findings from the selected studies.ResultsOut of 160 studies, 11 were retained. Two main themes emerged: the conceptualization of patient participation and the patients' role preferences. Patient participation included various activities including goal setting, information exchange, decision‐making and exercise training and often influenced the power relation between patient and physiotherapist. Patients' willingness to participate varied, and they often did not play their desired role.ConclusionsPatients and physiotherapists perceived participation to be valuable yet challenging. Problems of conceptualization, power inequalities, lack of health professionals' skills and lack of the right attitude to share power and responsibility from both sides were some of the barriers that impeded optimal participation. Copyright © 2011 John Wiley & Sons, Ltd.
Anti‐tumor effects of endogenous prostate cancer‐specific CD8 T cells in a murine TCR transgenic model
Authors: Bruno Tullia C. , Rothwell Cristin , Grosso Joseph F. , Getnet Derese , Yen Hung Rong , Durham Nicholas M. , Netto George , Pardoll Drew M. , Drake Charles G. 
Published: July 2011

AbstractBACKGROUNDThe CD8 T‐cell response to prostate and other cancers is often functionally diminished or absent. This may occur via deletion of tumor‐specific T cells, through acquisition of an anergic phenotype, or via active suppression mediated by another population of cells.METHODSWe used a double transgenic model in which mice express CD8 T cells specific for a prostate/prostate cancer antigen to study the response of CD8 T cells to evolving autochronous prostate tumors in TRAMP mice. CD8 T cells were analyzed for functionality by measuring IFN‐γ production via flow cytometry and via an in vivo CTL killing assay. In addition, pathological scoring of the prostates of the double transgenic mice was compared to scoring of tumor burden prostates of ProTRAMP mice.RESULTSTumor‐specific CD8 T cells were not grossly deleted in these animals, but evidenced a clearly non‐functional phenotype. Interestingly, full lytic function was rapidly recovered upon removal from tumor‐bearing mice.CONCLUSIONSThese data indicate a role for continuous antigen exposure in the maintenance of tumor‐specific CD8 T‐cell tolerance to prostate cancer. Prostate 72:514–522, 2012. © 2011 Wiley Periodicals, Inc.
Chronic prostatitis does not influence urinary PCA3 score
Authors: Vlaeminck‐Guillem Virginie , Bandel Marion , Cottancin Martine , Rodriguez‐Lafrasse Claire , Bohbot Jean‐Marc , Sednaoui Patrice 
Published: July 2011

AbstractBACKGROUNDThe influence of chronic prostatitis on serum PSA level is well known. Whether it also influences potential new biomarkers of prostate cancer (PCa) has to be determined. We conducted a prospective study to evaluate the effect of chronic prostatitis on the PCa urinary marker PCA3.METHODSIncluded were 38 patients, mean‐aged of 37.5 years, with clinical suspicion of chronic prostatitis. A simplified version of the Meares–Stamey four‐glass localization test was performed and urine specimens were collected for cytological analysis and culture. A postprostatic massage urine sample was used for the urinary PCA3 test.RESULTSFour patients had an eventual diagnosis of urethritis and all had a PCA3 score less than 5. Among the remaining 34 patients, 7 had bacterial chronic prostatitis (NIH II prostatitis), 11 had abacterial chronic prostatitis (NIH IIIa), and 16 had non inflammatory prostatodynia (NIH IIIb). All these patients had a PCA3 score less than 28, that is, under the cutoff of 35, which is commonly used for prostate cancer diagnosis. Patients with NIH category IIIa prostatitis had significantly higher number of leukocytes and red cells as well as prostate cells in urine samples but their PCA3 scores did not differ from those of other prostatitis patients.CONCLUSIONIn this study, NIH II and III chronic prostatitis did not influence the PCA3 score. Our results suggest that increased PCA3 score is unlikely to be explained by the sole chronic prostatitis and warrants prostate biopsies to eliminate prostate cancer. Prostate 72:549–554, 2012. © 2011 Wiley Periodicals, Inc.
Baseline risk assessment tool: A comprehensive risk management tool for process safety
Authors: Cherubin Paolo , Pellino Stefano , Petrone Annamaria 
Published: July 2011

AbstractLarge losses are typically the result of the failure of multiple safety barriers, often within complex scenarios. An innovative methodology accompanied by a dedicated software baseline risk assessment tool (BART) has been set up to cover all types of onshore and offshore installations and to allow any exploration and production organization to monitor all of its assets' status with a common and standardized approach. The BART tool combines a simplified quantitative risk assessment methodology with a bow‐tie model approach to identify and assess potential hazards and associated risks, that may arise from a process or activity carried out in an upstream onshore/offshore installation. The event sequence of any major incident is analyzed from the identification of primary root causes up to the determination of potential effects and associated impacts. Therefore, all existent safety barriers are identified and their prevention and mitigation risk reduction contributions are included in the analysis. The BART tool allows for a systematic monitoring of all major incident risks through the selection of effective control measures able to reduce the likelihood and/or to limit the potential effects of current risks. The BART methodology has been tested on some existing onshore and offshore oil and gas installations, and the main findings have been positively compared with alternative approaches. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2011
The Buncefield explosion: Were the resulting overpressures really unforeseeable?
Authors: Taveau Jérôme 
Published: July 2011

AbstractOn Sunday 11 December 2005, a severe unconfined vapor cloud explosion followed by several tank fires occurred at the Buncefield oil storage depot in England, near London, causing widespread damage to homes and businesses surrounding the site, hopefully without any victim.The damage caused by the resulting blast wave(s) surprised all the process safety community and explosion experts, as common hazard assessments would have predicted overpressures of only 5 kPa (0.73 psi), instead of 200 kPa (29 psi) as suggested by the data collected onsite.One of the particularities of the Buncefield oil storage depot is that it was surrounded by long and continuous rows of trees and bushes; this singularity is currently considered as a preponderant factor in the resulting high overpressures.Recently, explanations of the resulting overpressures were given by some authors using data from large‐scale explosion tests and CFD simulations.The objective of this article is to verify whether application of simple methodologies used in common risk assessments could allow to estimate the severity of the Buncefield explosion. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2012
Computational analysis of the amplification features of active plastic optical fibers
Authors: Ayesta I. , Arrue J. , Jiménez F. , Illarramendi M. A. , Zubia J. 
Published: July 2011

AbstractPolymer optical fibers doped with organic dyes can be used as efficient optical amplifiers and lasers in the visible region. We computationally study the spectral evolution with distance of the pulses propagating along such fibers. The main goal is to analyze the lasing threshold and the slope efficiency as functions of the fraction of spontaneous emission that contributes to laser emission. The discussion focuses on rhodamine‐6G doped fibers.
Temperature‐dependent Raman investigation of CuInS2 with mixed phases of chalcopyrite and CuAu
Authors: Wu Kunjie , Wang Deliang 
Published: July 2011

AbstractCuInS2 thin films with mixed phases of chalcopyrite (CH) and CuAu (CA) were prepared by using sulfurization of co‐evaporated CuIn alloy films. Detailed temperature‐dependent Raman scattering was carried out on the CuInS2 films at temperatures ranging from 83 to 693 K. The temperature dependences of Raman shifts were well fitted by using the Ridley model for both the CH and the CA A1 modes. The Raman frequency softening upon increasing the sample temperature could be well described by the combined contributions of both thermal expansion and three/four‐phonon anharmonic processes. Different Raman linewidths broadening behaviors were observed for the CH and CA A1 modes at temperature below ∼400 K. For the CH A1 mode, the fitting using multiple‐phonon anharmonic process matched the experimental linewidth data very well, while for the CA A1 mode, the multiple‐phonon fitting could only match the experimental linewidth data at high temperature. At low temperature, the unusual temperature‐dependent broadening of the CA A1 mode was believed to arise from the phonon scattering at the CH/CA phase boundary, which encompassed the nano‐sized CA domains embedded in the CH crystallite. It was found that the intensity ratio between CA A1 and CH A1 modes (I(CA)/I(CH)) was more reliable in assessment of CH crystallinity at different temperature than CH A1 linewidth. According to the temperature dependence of I(CA)/I(CH), it showed that no phase transformation took place during the test.
Strain Rate Effect on Material Behavior of TRIP‐Steel/Zirconia Honeycomb Structures
Authors: Ehinger D. , Krüger L. , Martin U. , Weigelt C. , Aneziris C.G. 
Published: July 2011

AbstractA pure TRIP‐steel alloy and a novel zirconia reinforced TRIP‐steel matrix composite were implemented in a 2D square‐celled honeycomb structure fabricated by a paste extrusion method, respectively. In terms of a series of compression tests in out‐of‐plane loading direction the buckling and the pronounced strain hardening behavior of the honeycomb structures are described with regard to different material compositions and varied nominal strain rates. Both the compressive flow behavior and the microstructure evolution in the crushed zones are controlled by the rate of formation of strain‐induced martensite and the ceramic particle/steel matrix interactions. The insertion of magnesia partially‐stabilized zirconia (Mg‐PSZ) particles in the austenitic steel matrix cause an increased yield strength and higher compression stresses up to certain deformations degrees. The limited ductility of the composite materials is a consequence of the rearrangement and fracture of zirconia particles initiating cracks and shear bands during deformation. Consistently, the visible strain rate effects on the mechanical responses of the honeycomb structures are similar to AISI 304L austenitic stainless steel specimens in the form of compact rods. However, at high local strain rates generated in drop weight impact tests a micro‐inertia factor support the failure behavior of the cellular structures.
Enhancing the Homogenized Diffusion of Chromium in Alloy Steel Ingot by Forging
Authors: Chen Kun , Yang Yitao , Shao Guangjie , Liu Kejia 
Published: July 2011

AbstractThe effects of forging on the diffusion of chromium (Cr) in alloy steel ingot are studied by diffusion model with finite element method (FEM) and verified by the experimental observations. Calculated results show that forging can enhance the diffusion of Cr in alloy steel ingot during the homogenization treatment, which is attributed to the geometry change and the increased diffusion coefficient caused by recrystallization. The geometry change caused by the forging is a factor to increase the diffusivity (from the high concentration region to the low one) of Cr. But, the diffusion coefficient of Cr in the deformed sample is obviously enhanced, the diffusivity is two orders of magnitude higher than that caused by geometry change. The enlarged diffusion coefficient is originated from the recrystallization, which plays a major role in enhancing the diffusion during the homogenization treatment. The experimental results are confirmed with the calculated predicts, the calculated deviation is less than 7%. It is shown that the effect of recrystallization is a new mechanism of enhancing the diffusion by forging .The theoretical explanations of the diffusion mechanism enhanced by forging are also proposed.
Orthogonal frequency division multiple access resource allocation in mobile multihop relay networks using an adaptive frame structure
Authors: Kwon Bongkyoung , Beyah Raheem A. , Lee Myunghwan , Copeland John A. 
Published: July 2011

ABSTRACTFor wireless mobile multihop relay (MMR) networks, we have chosen orthogonal frequency division multiple access (OFDMA) and time division duplex as a multiple access scheme and a duplex communication technique, respectively. We have also selected nontransparent relay stations (nt‐RSs) as relay nodes to extend the MMR network coverage. Through the nt‐RSs, far‐off subscriber stations (SSs) or hidden SSs can communicate with a base station (BS) that is connected to backhaul networks. In these MMR networks, the way in which a BS and nt‐RSs use OFDMA resources (e.g., OFDMA symbols and subcarriers) and share them might reduce system capacity and network throughput. Therefore, we proposed a new adaptive OFDMA frame structure for both the BS and the nt‐RSs. The proposed scheme is the first approach that incorporates the adaptive technique for wireless MMR networks. Based on the proposed adaptive OFDMA frame structure, an adaptive OFDMA resource allocation for SSs within a BS as well as nt‐RSs was proposed. To derive the maximum OFDMA resource that nt‐RSs can be assigned and to synchronize access zones and relay zones between a superior station and its subordinate nt‐RSs, three properties are introduced: a data relay property, a maximum balance property, and a relay zone limitation property. In addition, we propose max‐min and proportional fairness schemes of the proposed adaptive frame structure. Our numerical analysis and simulations show that the proposed OFDMA allocation scheme performs better than the nonadaptive allocation scheme in terms of network throughput and fairness especially in the asymmetric distribution of subscriber stations between access zones and relay zones in the MMR networks. Copyright © 2011 John Wiley & Sons, Ltd.
Interference management in femtocell networks
Authors: Fan Zhong , Cao Fengming , Sun Yong , Zhu Ziming 
Published: July 2011

ABSTRACTRecently, smaller cells such as femtocells have been proposed to address the cellular coverage problem and provide a ‘greener’ solution to future high‐speed wireless access. On the other hand, interference is a serious problem that could impact the wide deployment of femtocells. The contributions of this paper are threefold. First, we focus on the trade‐off between energy efficiency and system performance. With realistic long‐term evolution system parameters, we have shown that femtocells can indeed improve energy efficiency of the network. However, this comes with a price—performance degradation due to interference, which is especially severe in densely deployed scenarios. Second, we propose a proactive approach to handover and access management in femtocell systems, focusing especially on the interference issue of closed subscriber group femtocells. Third, we propose an efficient data offloading mechanism for interference mitigation and mobility management, with the aim to avoid potential interference and save radio resources and signalling load in the network. Simulation results have been presented to demonstrate the benefits of the proposed schemes. Copyright © 2011 John Wiley & Sons, Ltd.
An inductive characterization of matching in binding bigraphs
Authors: Damgaard Troels C. , Glenstrup Arne J. , Birkedal Lars , Milner Robin 
Published: July 2011

Abstract
We analyze the matching problem for bigraphs. In particular, we present a sound and complete inductive characterization of matching in bigraphs with binding. Our results yield a specification for a provably correct matching algorithm, as needed by our prototype tool implementing bigraphical reactive systems.
An inductive approach to strand spaces
Authors: Li Yongjian , Pang Jun 
Published: July 2011

Abstract
In this paper, we develop an inductive approach to strand spaces, by introducing an inductive definition for bundles. This definition provides us not only a constructive illustration for bundles, but also an effective and rigorous technique of rule induction to reason about properties of bundles. With this induction principle, we can prove that our bundle model is sound in the sense that a bundle is a causally well-founded graph. This approach also gives an alternative to rigorously prove a generalized version of authentication tests. To illustrate the applicability of our approach, we have performed case studies on verification of secrecy and authentication properties of the Needham–Schroeder–Lowe and Otway–Rees protocols. Our approach has been mechanized using Isabelle/HOL.
Automated transport service management in the future Internet: concepts and operations
Authors: Callegati Franco , Campi Aldo , Cerroni Walter 
Published: July 2011

AbstractThis paper describes a possible approach to provide advanced communication services for the Future Internet in an automated way. This is achieved by introducing a newCognitive Transport Servicelayer on top of the traditional transport layer, which is used by the network to automatically negotiate the required transport service with the applications. Experimental validation of the proposed solution is discussed with the help of two case studies: bandwidth reservation on a secure channel and dynamic bandwidth negotiation for variable-quality video streaming.