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Models, Theoretical (11):
Recent article
Models, Theoretical
Abstract
This work defines an incompressible, hyperelastic theory of anisotropic soft materials at finite strains, which is tested by application to the experimental response of fiber-reinforced rubber materials. The experimental characterization is performed using a uniaxial testing device w...
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PMID: 21783146
PDF is available here.
PDF is available here.
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Molecular BioSystems (7)10 2011
Abstract
We applied a stochastic calculus of domain binding provided by a rule-based modelling approach to formalise the highly combinatorial signalling pathway in the PSD and perform the numerical analysis of the relative distribution of protein complexes and their sizes. We specified the combinatorics of p...
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PMID: 21874189
PDF is available here.
PDF is available here.
American Naturalist (178)S1 2011
Abstract
We walk through a set of interrelated spatial scenarios that illustrate interesting complexities of this interplay. To motivate our individual-based model results, we consider a hypothetical zooplankter in a landscape of discrete water bodies coupled by dispersal. We examine how patterns of dispersa...
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PMID: 21956092
PDF is available here.
PDF is available here.
Abstract
The retention behavior of components analyzed by chromatography varies with instrumental settings. Being able to predict how changes in these settings alter the elution pattern is useful, both with regards to component identification, as well as with regards to optimization of the chromatographic sys...
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PMID: 21851946
PDF is available here.
PDF is available here.
Abstract
Intervening on social determinants of health requires that public health stakeholders enter into intersectoral partnerships. The lack of valid tools to evaluate the quality of partnerships is a significant constraint to formulating convincing arguments for this kind of action. In light of this shortc...
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PMID: 21913588
PDF is available here.
PDF is available here.
Sports Biomechanics (10)3 2011
Abstract
When cycling on level ground at a speed greater than 14 m/s, aerodynamic drag is the most important resistive force. About 90% of the total mechanical power output is necessary to overcome it. Aerodynamic drag is mainly affected by the effective frontal area which is the product of the projected fron...
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PMID: 21936289
PDF is available here.
PDF is available here.
Pediatric Annals (40)9 2011
Abstract
Abstract
We observe-at a fixed spin magnetic moment-the subsequent transition of both spin sub-systems from the Fermi liquid to the Wigner crystal state. A dramatic signature of Wigner crystallization is that the persistent current drops sharply with increasing r(S). We observe simultaneously the emergence o...
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PMID: 21811009
PDF is available here.
PDF is available here.
Abstract
Given the popular and ever-increasing use of path analytic research paradigms in the social sciences, it is desirable to conduct an investigation into the accuracy of the standardized path coefficients that are often the end-product of these paradigms. In pursuit of this goal, population parameters w...
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PMID: 21842623
PDF is available here.
PDF is available here.
Abstract
We shall address. We shall point out the confusions about the conventional identity in the min-plus algebra and present an analytical expression of the asymptotic identity that may not cause confusions....
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PMID: 21822446
PDF is available here.
PDF is available here.
Abstract
Abstract
We compared the performance of the PT2 scheme on the two title molecules using SCF, MP2 and DFT (BLYP, B3LYP, PBE and B3PW91 functionals) methods combined with polarization consistent pc-n (n = 0, 1, 2, 3, 4) basis sets, Dunning's basis sets (aug)-cc-pVXZ where X = D, T, Q, 5, 6 and Pople's...
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PMID: 21153906
PDF is available here.
PDF is available here.
Abstract
Influenza pandemics have occurred throughout history and were associated with substantial excess mortality and morbidity. Mathematical models of infectious diseases permit quantitative description of epidemic processes based on the underlying biological mechanisms. Mathematical model...
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PMID: 21727183
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1814)8 2011
Abstract
The problem of spontaneous folding of amino acid chains into highly organized, biologically functional three-dimensional protein structures continues to challenge the modern science. Understanding how proteins fold requires characterization of the underlying energy landscapes as well as the dynamics...
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PMID: 20883829
PDF is available here.
PDF is available here.
Abstract
To investigate, using Rasch analysis, whether the 15-item Glaucoma Quality of Life-15 (GQL-15) forms a valid scale and to optimize its psychometric properties.
One hundred eighteen glaucoma patients (mean age, 65.7 years) completed the German-version of the GQL-15. Ra...
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PMID: 21810983
PDF is available here.
PDF is available here.
Abstract
Abstract
Abstract When cultured hepatocytes are exposed to challenging environments such as plasma, they frequently suffer a decline in liver-specific functions. Media supplements are sought to reduce or eliminate this effect. A rational design approach for amino acid supplementation in hepat...
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PMID: 21410329
PDF is available here.
PDF is available here.
Abstract
The two-way insertion loss of a 1 m length of waveguide was reduced by nearly 5 dB over a 4% bandwidth at W-band (94 GHz) for an electron paramagnetic resonance (EPR) spectrometer relative to WR10 waveguide. The waveguide has an oversize section of commercially available rectangular WR28 and a novel...
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PMID: 21806211
PDF is available here.
PDF is available here.
Abstract
The aromatic excimers of benzene, naphthalene, anthracene, pyrene, and perylene are systematically investigated using the multiconfiguration quasi-degenerate perturbation theory (MCQDPT) method, which is one of high-level ab initio quantum chemical methods. The reference configuration space for MCQDP...
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PMID: 21650200
PDF is available here.
PDF is available here.
Abstract
Abstract Purpose To examine racial/ethnic differences in relationships between food-related environmental, behavioral and personal factors and low-income women's weight status using Social Cognitive Theory (SCT) as a framework. Design Cross-sectional survey. Setting Community sites a...
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PMID: 21721954
PDF is available here.
PDF is available here.
Ecological Applications (21)5 2011
Abstract
We propose that three conditions should be met before implementing assisted migration in reforestation programs: (1) evidence of a climate-related adaptational lag, (2) observed biological impacts, and (3) robust model projections to target assisted migration efforts. In a case study of aspen (Popul...
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PMID: 21830704
PDF is available here.
PDF is available here.
Abstract
To evaluate the effect of an inpatient geriatric consultation team (IGCT) on end points of interest in people with hip fracture: length of stay, functional status, mortality, new nursing home admission, and hospital readmission.
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PMID: 21718273
PDF is available here.
PDF is available here.
Abstract
Recently, there has been increasing focus on prevention of mental illness, early intervention and the promotion of mental health. The social determinants of health and public health approaches are considered key. Early intervention has focused on psychotic disorders but prevention has not. This may i...
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PMID: 21719876
PDF is available here.
PDF is available here.
Abstract
Abstract Interdisciplinary care management is advocated for optimal care of patients with many types of chronic illnesses; however, few models exist that have been tested using randomized trials. The purpose of this report is to describe the theoretical basis for the After Discharge...
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PMID: 21323461
PDF is available here.
PDF is available here.
Abstract
Abstract By 2030, the number of older adults within the United States will have doubled to approximately 71.5 million. Included in this population estimate is the relative growth in the number of older adults of racial and ethnic minority descent. Research has indicated that these in...
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PMID: 21323464
PDF is available here.
PDF is available here.
Abstract
A number of existing risk assessment tools make reference to, or incorporate, a Multiple Barrier Approach to drinking water safety. Three waterborne disease outbreaks that occurred in developed nations were used as case studies to test a selected set of risk assessment tools. The outbreaks were used...
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PMID: 21942199
PDF is available here.
PDF is available here.
Klinichna khirurhiia / Ministerstvo okhorony zdorov'ia Ukrainy, Naukove tovarystvo khirurhiv Ukrainy ()6 2011
Abstract
There was estimated the severity state in 129 patients, suffering an acute pancreatitis, using the ASSES, SAPS, APACHE II and V. S. Savelyev's scales. Trustworthy differences of their values were established in survivors and the dead patients immediately after admitting to the hospital, before the op...
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PMID: 21846030
PDF is available here.
PDF is available here.
Abstract
Abstract
The etiology of type 2 diabetes mellitus involves the induction of insulin resistance along with the disruption of pancreatic β-cell function and the loss of β-cell mass. In addition to a genetic predisposition, lifestyle factors seem to have an important role. Epidemiological stud...
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PMID: 21467970
PDF is available here.
PDF is available here.
Medical Physics (38)6 2011
Abstract
Mechanical instabilities that occur during gantry rotation of on-board cone-beam computed tomography (CBCT) imaging systems limit the efficacy of image-guided radiotherapy. Various methods for calibrating the CBCT geometry and correcting errors have been proposed, including some that utilize dedicate...
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PMID: 21815358
PDF is available here.
PDF is available here.
Ginekologia polska (82)6 2011
Abstract
We discuss the usefulness of various risk estimation models and their possible application for breast cancer prophylaxis....
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PMID: 21853936
PDF is available here.
PDF is available here.
Abstract
We report a theoretical study of second-harmonic generation (SHG) from the collagen fibrils which have a tilt angle Φ between their axes with the plane of the polarization angle α of the linearly polarized focused light. The effects of Φ as well as α on SHG emission have been investigated. Our r...
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PMID: 21613673
PDF is available here.
PDF is available here.
Abstract
We introduce the dimensionless parameter, called by us a Katchalsky number (Ka), modifies R(C) of membrane transport. The critical value of this number well describes a moment of transition from the state of diffusion into convective diffusion membrane transport....
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PMID: 21613674
PDF is available here.
PDF is available here.
Abstract
The main objective of this study was to investigate the capabilities of the receptor-oriented inverse mode Lagrangian Stochastic Particle Dispersion Model (LSPDM) with the 12-km resolution Mesoscale Model 5 (MM5) wind field input for the assessment of source identification from seven regions impactin...
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PMID: 21751582
PDF is available here.
PDF is available here.
Abstract
Abstract
American Surgeon (137)4 2011
Abstract
Abstract
Membrane gas separation technologies (air separation, hydrogen recovery from dehydrogenation processes, etc.) use traditionally the glassy polymer membranes with dominating permeability of "small" gas molecules. For this purposes the membranes based on the low free volume glassy polymers (e.g., polys...
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PMID: 21094931
PDF is available here.
PDF is available here.
Abstract
We performed fluorescence correlation spectroscopy measurements to assess the long-time self diffusion of a variety of spherical tracer particles in periodic porous nanostructures. Inverse opal structures with variable cavity sizes and openings in the nanometer domain were employed as model system....
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PMID: 21548605
PDF is available here.
PDF is available here.
Abstract
We have used Monte Carlo simulations of diffusion and MP-FRAP to understand the effect of barriers of varying geometries and positions relative to the two-photon focal volume. Furthermore, we supply ranges of barrier positions within which MP-FRAP can confidently be employed to measure accurate diff...
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PMID: 21728580
PDF is available here.
PDF is available here.
Abstract
To discuss why spouse caregivers (CGs) of people with dementia may be at higher risk for cognitive problems and decline than demographically similar people not caring for a spouse with dementia (noncaregivers; NCGs).
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PMID: 21568959
PDF is available here.
PDF is available here.
Abstract
This paper presents experimental data concerning the flow and noise generated by a sharp-edged flat plate at low-to-moderate Reynolds number (Reynolds number based on chord of 2.0 × 10(5) to 5.0 × 10(5)). The data are used to evaluate a variety of semi-empirical trailing edge noise prediction metho...
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PMID: 21568386
PDF is available here.
PDF is available here.
Abstract
Quantitative elastography techniques have recently been developed to estimate the shear modulus μ of soft tissues in vivo. In the case of isotropic and quasi-incompressible media, the Young's modulus E is close to 3 μ, which is not true in transverse anisotropic tissues such as muscles. In this let...
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PMID: 21568379
PDF is available here.
PDF is available here.
Abstract
The sound generated by a vortex propagating across a two-dimensional duct section with flexible walls (membranes) in an infinitely long rigid duct conveying a flow is investigated numerically using the matched asymptotic expansion technique and the potential theory. The effects of the initial vortex...
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PMID: 21568387
PDF is available here.
PDF is available here.
Abstract
A two dimensional simulation study was performed to investigate the photoacoustic signal properties of non-aggregated and aggregated erythrocytes. Spatial distributions of non-aggregated blood samples were generated by employing a Monte Carlo method and aggregated blood samples were simulated using a...
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PMID: 21568396
PDF is available here.
PDF is available here.
Abstract
Assessment of bone loss and osteoporosis by ultrasound systems is based on the speed of sound and broadband ultrasound attenuation of a single wave. However, the existence of a second wave in cancellous bone has been reported and its existence is an unequivocal signature of poroelastic media. To acco...
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PMID: 21568431
PDF is available here.
PDF is available here.
Abstract
We propose a novel framework for adaptively learning the sparsifying transform (dictionary), and reconstructing the image simultaneously from highly undersampled k-space data. The sparsity in this framework is enforced on overlapping image patches emphasizing local structure. Moreover, the dictionar...
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PMID: 21047708
PDF is available here.
PDF is available here.
Abstract
To perform a prospective validation and comparative analysis of two ultrasonographic diagnostic scores of cirrhosis in patients with silent liver disease.
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PMID: 21619386
PDF is available here.
PDF is available here.
Abstract
This article describes the development of a Structured Education Pulmonary Rehabilitation Programme (SEPRP), for the PRINCE (Pulmonary Rehabilitation In Nurse-led Community Environments) study. This process involved a literature review of existing PR programmes, a content analysis of national and int...
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PMID: 21642927
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1811)5 2011
Abstract
The LDL cholesterol (LDL-C) and HDL cholesterol (HDL-C) concentrations are determined by the activity of a complex network of reactions in several organs. Physiologically-based kinetic (PBK) computational models can be used to describe these different reactions in an integrated, quantitative manner....
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PMID: 21320632
PDF is available here.
PDF is available here.
Abstract
Abstract
The object of this study was to investigate the influence of static and dynamic forces on mechanical properties of the biocompatible polymer ethyl cellulose. Similar polymeric films containing 40% (w/w) of the plasticizer dibutyl sebacate were subjected to tensile forces at different velocities. The...
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PMID: 21095223
PDF is available here.
PDF is available here.
Abstract
Numerous studies with conflicting results have tried to prove the influence of seasonal variations or different meteorological factors on the occurrence of aneurysmal subarachnoidal hemorrhage (SAH). The aim of this study was to establish a mathematical model of a series of aneurysmal rupture dates i...
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PMID: 21499961
PDF is available here.
PDF is available here.
British Journal of Health Psychology (16)Pt 2 2011
Abstract
Objective. The identification of the determinants of physical activity (PA) among older adults is an important avenue of research. To date, although the health action process approach (HAPA) has proven to be a valid framework for the prediction of PA among heterogeneous sample of both middle-aged a...
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PMID: 21489066
PDF is available here.
PDF is available here.
Abstract
A numerical model is developed to describe the separation process of countercurrent chromatography (CCC) in this work. The theory of countercurrent extraction table (TCCET) is first proposed to calculate concentration distributions of chemical components in the CCC, which is essentia...
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PMID: 21491591
PDF is available here.
PDF is available here.
Abstract
We increasingly treat diseases, not persons, and it moves individuals from active participants in the care process to passive recipients of interventions. This problem is especially important for general medicine, where we must maintain the balance between person and disease, caring and technology....
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PMID: 21091852
PDF is available here.
PDF is available here.
Abstract
Whether or not 5-aminosalicylates can prevent colorectal cancer among patients with colitis remains an open question. The observational studies examining this question have provided conflicting results, but none of these studies have been of sufficient quality to provide a definitive answer one way o...
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PMID: 21468069
PDF is available here.
PDF is available here.
Abstract
We first discuss the features of these innovations to assess how disruptive they are. We then draw on the literature on strategic adaptation to suggest how incumbents develop competitive responses to these disruptive innovations that assure their continued survival. These arguments are then evaluate...
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PMID: 21091376
PDF is available here.
PDF is available here.
Abstract
This paper discusses the prediction of verbal-communication quality in eating establishments (EEs). EEs contain talkers and listeners who require high speech intelligibility at their tables, and high speech privacy between tables. Using catt-Acoustic, verbal-communication quality--quantified by speec...
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PMID: 21476656
PDF is available here.
PDF is available here.
Abstract
Approximately a quarter of all West Indian manatee (Trichechus manatus latirostris) mortalities are attributed to collisions with watercraft. A boater warning system based on the passive acoustic detection of manatee vocalizations is one possible solution to reduce manatee-watercraft collisions. The...
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PMID: 21476661
PDF is available here.
PDF is available here.