bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sensitivity and specificity of blood cobalt and chromium metal ions for predicting failure of metal-on-metal hip replacement
Authors: Hart A. J. , Sabah S. A. , Bandi A. S. , Maggiore P. , Tarassoli P. , Sampson B. , A. Skinner J. 
Published: October 2011

Blood metal ions have been widely used to investigate metal-on-metal hip replacements, but their ability to discriminate between well-functioning and failed hips is not known. The Medicines and Healthcare products Regulatory Agency (MHRA) has suggested a cut-off level of 7 parts per billion (ppb). We performed a pair-matched, case-control study to investigate the sensitivity and specificity of blood metal ion levels for diagnosing failure in 176 patients with a unilateral metal-on-metal hip replacement. We recruited 88 cases with a pre-revision, unexplained failed hip and an equal number of matching controls with a well-functioning hip. We investigated the 7 ppb cut-off level for the maximum of cobalt or chromium and determined optimal mathematical cut-off levels from receiver-operating characteristic curves. The 7 ppb cut-off level for the maximum of cobalt or chromium had a specificity of 89% and sensitivity 52% for detecting a pre-operative unexplained failed metal on metal hip replacement. The optimal cut-off level for the maximum of cobalt or chromium was 4.97 ppb and had sensitivity 63% and specificity 86%. Blood metal ions had good discriminant ability to separate failed from well-functioning hip replacements. The MHRA cut-off level of 7 ppb provides a specific test but has poor sensitivity.
Does cementing the femoral component increase the risk of peri-operative mortality for patients having replacement surgery for a fracture of the neck of femur?
Authors: Costa M. L. , Griffin X. L. , Pendleton N. , Pearson M. , Parsons N. 
Published: October 2011

Concerns have been reported to the United Kingdom National Patient Safety Agency, warning that cementing the femoral component during hip replacement surgery for fracture of the proximal femur may increase peri-operative mortality. The National Hip Fracture Database collects demographic and outcome data about patients with a fracture of the proximal femur from over 100 participating hospitals in the United Kingdom. We conducted a mixed effects logistic regression analysis of this dataset to determine whether peri-operative mortality was increased in patients who had undergone either hemiarthroplasty or total hip replacement using a cemented femoral component. A total of 16 496 patients from 129 hospitals were included in the analysis, which showed a small but significant adjusted survival benefit associated with cementing (odds ratio 0.83, 95% confidence interval 0.72 to 0.96). Other statistically significant variables in predicting death at discharge, listed in order of magnitude of effect, were gender, American Society of Anesthesiologists grade, age, walking accompanied outdoors and arthroplasty. Interaction terms between cementing and these other variables were sequentially added to, but did not improve, the model. This study has not shown an increase in peri-operative mortality as a result of cementing the femoral component in patients requiring hip replacement following fracture of the proximal femur.
Differences in post-operative functional disability and patient satisfaction between patients with long (three levels or more) and short (less than three) lumbar fusions
Authors: Lee C.-S. , Chung S- S. , Shin S.-K. , Park S.-J. , Lee H.-I. , Kang K.-C. 
Published: October 2011

We examined the differences in post-operative functional disability and patient satisfaction between 56 patients who underwent a lumbar fusion at three or more levels for degenerative disease (group I) and 69 patients, matched by age and gender, who had undergone a one or two level fusion (group II). Their mean age was 66 years (49 to 84) and the mean follow-up was 43 months (24 to 65). The mean pre-operative Oswestry Disability Index (ODI) and visual analogue scale (VAS) for back and leg pain, and the mean post-operative VAS were similar in both groups (p > 0.05), but post-operatively the improvement in ODI was significantly less in group I (40.6%) than in group II (49.5%) (p < 0.001). Of the ten ODI items, patients in group I showed significant problems with lifting, sitting, standing, and travelling (p < 0.05). The most significant differences in the post-operative ODI were observed between patients who had undergone fusion at four or more levels and those who had undergone fusion at less than four levels (p = 0.005). The proportion of patients who were satisfied with their operations was similar in groups I and II (72.7% and 77.0%, respectively) (p = 0.668). The mean number of fused levels was associated with the post-operative ODI (r = 0.266, p = 0.003), but not with the post-operative VAS or satisfaction grade (p > 0.05). Post-operative functional disability was more severe in those with a long-level lumbar fusion, particularly at four or more levels, but patient satisfaction remained similar for those with both long- and short-level fusions.
Robotic systems in orthopaedic surgery
Authors: Lang J. E. , Mannava S. , Floyd A. J. , Goddard M. S. , Smith B. P. , Mofidi A. , M. Seyler T. , Jinnah R. H. 
Published: October 2011

Robots have been used in surgery since the late 1980s. Orthopaedic surgery began to incorporate robotic technology in 1992, with the introduction of ROBODOC, for the planning and performance of total hip replacement. The use of robotic systems has subsequently increased, with promising short-term radiological outcomes when compared with traditional orthopaedic procedures. Robotic systems can be classified into two categories: autonomous and haptic (or surgeon-guided). Passive surgery systems, which represent a third type of technology, have also been adopted recently by orthopaedic surgeons.While autonomous systems have fallen out of favour, tactile systems with technological improvements have become widely used. Specifically, the use of tactile and passive robotic systems in unicompartmental knee replacement (UKR) has addressed some of the historical mechanisms of failure of non-robotic UKR. These systems assist with increasing the accuracy of the alignment of the components and produce more consistent ligament balance. Short-term improvements in clinical and radiological outcomes have increased the popularity of robot-assisted UKR.Robot-assisted orthopaedic surgery has the potential for improving surgical outcomes. We discuss the different types of robotic systems available for use in orthopaedics and consider the indication, contraindications and limitations of these technologies.
Luminescent Bacteria as an Indicator Species for Lubricant Formulation Ecotoxicity
Authors: Sander John , Smith Terry , Bilberry Patrick 
Published: October 2011

Abstract
For a number of years, luminescent bacteria have been used as an indicator species for acute toxicity of substances in aquatic marine environments. Various other higher organisms have been used for this exact same purpose. Many of the higher organism test evaluations have been used successfully, but they have a few limitations, such as a low number of organisms exposed to toxicant during a test, less than desirable precision and the need for highly trained individuals to run the tests. One luminescent bacterial bioassay includes many organisms, can be run rapidly and requires training in sample dilution techniques. ASTM Subcommittee D02.12 has been working to develop an ecotoxicity method to evaluate the effects of lubricant formulations on luminescent bacteria. The theory describing this method, as well as the D02.12 method development activities, will be discussed.
Corrosion of Rebar and Role of Fiber Reinforced Concrete
Authors: Sappakittipakorn Manote , Banthia Nemkumar 
Published: October 2011

Abstract
Recent studies have shown that fiber reinforcement of concrete reduces its permeability to water and enhances its service life. In this study, this finding was extended to determine if fiber reinforcement can also control corrosion of reinforcing steel in traditionally reinforced concrete. Two fiber types, cellulose and polypropylene, at 0.1 % and 0.3 % volume fraction, were examined. Two series of tests were performed. In the first series, chloride transport characteristics were determined by using the Bulk Diffusion Test, the Silver Nitrate Spray Test and the Rapid Chloride Permeability Test. In the second series, corrosion activity in reinforcing steel was monitored in loaded RC beams with and without fiber reinforcement for a year in a simulated marine environment. Results demonstrated that while the presence of fibers increased the coefficient of chloride diffusion based on total chlorides, there was a decrease in the coefficient related to free chlorides. Fibers therefore appear to bind the chlorides and inhibit their transport through concrete. Corrosion tests further corroborated these findings and indicated that fibers delayed the onset of corrosion in RC beams as long as the applied load did not exceed a certain threshold value.
Patterns of Diabetic Periodontal Wound Repair: A Study Using Micro‐Computed Tomography and Immunohistochemistry
Authors: Chang Po‐Chun , Chung Min‐Chun , Wang Yi‐Ping , Chien Li‐Ying , Lim Jason C. , Liang Kaicheng , Chong Li Yen , Kuo Yen‐Ping , Chen Chun‐Hao , Chiang Huan‐Ching 
Published: October 2011

Background: Diabetes is known to impair wound healing and deteriorate the periodontal condition. There is limited information about the patterns and events associated with periodontal wound repair. In this study, we evaluate the dynamics of periodontal wound repair using micro‐computed tomography (microCT) and immunohistochemistry.Methods: Thirty‐six male rats were used, and diabetes was induced by streptozotocin. The maxillary first molars were extracted, and a tooth‐associated osseous defect was created in the extraction area. Animals were sacrificed after 7, 14, and 21 days. Volumetry and distribution of bone trabeculae were evaluated by microCT imaging. The patterns of healing and collagen alignment were evaluated by histology. Advanced glycation end‐product (AGE) deposition and expression of the receptor for AGEs (RAGE), tartrate‐resistant acid phosphatase, and proliferating cell nuclear antigen were evaluated by histochemical and immunohistochemical staining.Results: Diabetic animals demonstrated a significantly reduced bone volume and trabecular number as well as thinner trabeculae and more trabecular separation in osseous defects. The early stage was characterized by significantly reduced cellular proliferation and prolonged active inflammation without evident bone resorption, whereas delayed recovery of collagen realignment, matrix deposition, and bone turnover was noted in later stages. Although AGEs and RAGE were present during healing in diabetes and controls, a stronger and more persistent level of expression was observed in the group with diabetesConclusions: Diabetes significantly delayed osseous defect healing by augmenting inflammation, impairing proliferation, and delaying bone resorption. The AGE–RAGE axis can be activated under metabolic disturbance and inflammation.
The Airy transform and associated polynomials
Authors: Babusci Danilo , Dattoli Giuseppe , Sacchetti Dario 
Published: October 2011

Abstract
The Airy transform is an ideally suited tool to treat problems in classical and quantum optics. Even though the relevant mathematical aspects have been thoroughly investigated, the possibilities it offers are wide and some features, such as the link with special functions and polynomials, still contain unexplored aspects. In this note we will show that the so called Airy polynomials are essentially the third order Hermite polynomials. We will also prove that this identification opens the possibility of developing new conjectures on the properties of this family of polynomials.
Interplay of information quantifiers and the modified Jaynes-Cummings model
Authors: Abdel-Khalek Sayed , Plastino Angelo , Obada Abdel-Shafy 
Published: October 2011

Abstract
The dynamics of the Buck and Sukumar model (B. Buck and C. V. Sukumar, Phys. Lett. A 81, 132 (1981)) is investigated using different semi-classical information-theory tools. Their interplay reveals somewhat unexpected features. A new signature for the classical-quantum barrier is encountered thereby.
A direct connection between quantum Hall plateaus and exact pair states in a 2D electron gas
Authors: Hai Wenhua , Li Zejun , Xiao Kewen 
Published: October 2011

Abstract
It is previously found that the two-dimensional (2D) electron-pair in a homogeneous magnetic field has a set of exact solutions for a denumerably infinite set of magnetic fields. Here we demonstrate that as a function of magnetic field a band-like structure of energy associated with the exact pair states exists. A direct and simple connection between the pair states and the quantum Hall effect is revealed by the band-like structure of the hydrogen “pseudo-atom”. From such a connection one can predict the sites and widths of the integral and fractional quantum Hall plateaus for an electron gas in a GaAs-AlxGa1−x
As heterojunction. The results are in good agreement with the existing experimental data.
Sentir la complexité, dire l'inconsistant
Authors: Caliandro Stefania 
Published: October 2011

Résumé La philosophie de l’art et les sciences du langage ont faiblement envisagé la question du logos de l’art , pourtant déterminant dans la pratique artistique : comment celui-ci se lie-t-il à l’appréhension sensorielle des œuvres. À travers les recherches plastiques et théoriques de deux artistes qui y ont longuement réfléchi, Paul Klee et Marcel Duchamp, nous essayons de comprendre comment le moment phénoménal et des éléments abstraitement intelligibles travaillent ensemble. La pensée plastique de Klee nous amène à percevoir la complexité du sentir, la vibration qui meut l’objet et le dote d’une fonction (naturelle ou artistique). La métalogique du possible dans l’œuvre de Duchamp préfigure, en revanche, un dire de l’art qui se tisse indissolublement à un art du dire. Inspirée par des études précédentes, notamment une suggestion de Louis Marin, ainsi que par les réflexions de Jean-François Lyotard, nous poursuivons nos recherches sur les espaces sémiotiques et relevons l’architectonique plurivoque des diversités dans l’art, qui procède, à une autre échelle , par projection topologique.
La musicalité dans les arts : une configuration transversale du sensible
Authors: Estay Stange Veronica 
Published: October 2011

Résumé Postulant l’hypothèse de la musicalité comme mode d’organisation du sensible, l’article prend appui sur les textes poétiques et picturaux du Symbolisme afin de caractériser cet opérateur transversal. Dans ce contexte, la musicalité émerge de la « désiconisation » en tant que processus d’effacement du contenu figuratif au profit du plan de l’expression dans les différents arts. Trois codifications esthétiques de ce dernier, impliquées dans les tensions esthétiques de la fin du xix e siècle, sont ensuite dégagées : le système tonal en musique, le vers alexandrin en poésie et le paradigme des complémentaires en peinture. Sur cette base, une modélisation est proposée qui, de la structure à la tensivité et à la subjectivité de l’acte énonciatif, met en évidence, autour de la musicalité, la « profondeur » générative du sensible.
Les prédicats somatiques
Authors: Coquet Jean-Claude 
Published: October 2011

Résumé En explicitant le concept linguistique de prédicat et en étendant sa portée, l’auteur introduit et définit celui de « prédicat somatique », responsable de l’expression du sensible dans le langage. Il en illustre la pertinence et en spécifie le contenu analytique à travers trois exemples. La reprise critique de l’analyse du « sein nu » dans Palomar d’I. Calvino par A.J. Greimas (dans De l’imperfection ) permet de dégager les propriétés du « corps percevant ». L’analyse d’un énoncé de la mère de Jamel Debbouze dans Télérama fait ressortir l’expression corporelle d’une vérité « refoulée, proscrite, par le langage », un « ça » vrai, expression d’un non-sujet immanent. Enfin, la relation fondamentale entre « l’acte politique » et « le corps parlant » est dégagée à partir de positions exprimées par Jean-Claude Milner et ici analysées dans la perspective du « prédicat somatique », dont trois variétés se trouvent ainsi dégagées au terme de l’article.
Spring Migration of Mallards from Arkansas as Determined by Satellite Telemetry
Authors: Krementz David G. , Asante Kwasi , Naylor Luke W. 
Published: October 2011

Abstract
We used satellite telemetry to document spring migration phenology, routes, stopover regions, and nesting sites of mallards Anas platyrhynchos marked in Arkansas during the winters of 2004–2007. Of the 143 marked mallards that migrated from Arkansas, they did so, on average, by mid-March. Mallards flew over the Missouri Ozarks and 42% made an initial stopover in Missouri, where they used areas that had larger rivers (Mississippi River, Missouri River) embedded in an agricultural landscape. From this stopover region they either migrated directly to the Prairie Pothole Region (PPR) or they migrated north to Minnesota where they either moved next to the PPR or to the north and east of the PPR. For those mallards (83%) that stopped for &gt;1 d before entering the PPR, the average length at each stop was 12 d (SE  =  0.90 d, range  =  2–54 d). Mallards made more stopovers, made shorter migration movements, and took longer to move to the PPR in wetter than drier years. Mallards arrived in the PPR earlier in 2006 (x¯  =  30 March, SE  =  2.18 d) than in 2005 (x¯  =  7 April, SE  =  2.30 d). Females nested across nine Bird Conservation Regions. Nesting occurred most frequently in South Dakota (n  =  9). The average date when females nested was 19 April (SE  =  2.44 d, range  =  12 March–26 May). Because many mallards headed for the large river corridors in Missouri for their first stopover, this region is an important spring migration stopover of continental importance to mallards and might be considered a focal area for conservation.
An Introduction to Adaptive Management for Threatened and Endangered Species
Authors: Runge Michael C. 
Published: October 2011

AbstractManagement of threatened and endangered species would seem to be a perfect context for adaptive management. Many of the decisions are recurrent and plagued by uncertainty, exactly the conditions that warrant an adaptive approach. But although the potential of adaptive management in these settings has been extolled, there are limited applications in practice. The impediments to practical implementation are manifold and include semantic confusion, institutional inertia, misperceptions about the suitability and utility, and a lack of guiding examples. In this special section of the Journal of Fish and Wildlife Management, we hope to reinvigorate the appropriate application of adaptive management for threatened and endangered species by framing such management in a decision-analytical context, clarifying misperceptions, classifying the types of decisions that might be amenable to an adaptive approach, and providing three fully developed case studies. In this overview paper, I define terms, review the past application of adaptive management, challenge perceived hurdles, and set the stage for the case studies which follow.
Interventions to Prevent Falls in Community-Dwelling Older Adults
Authors:   US Preventive Services Task Force, Nicholson Wanda K. , Silverstein Michael , Wong John B. , Barry Michael J. , Chelmow David , Coker Tumaini Rucker , Davis Esa M. , Jaén Carlos Roberto , Krousel-Wood Marie , Lee Sei , Li Li , Rao Goutham , Ruiz John M. , Stevermer James , Tsevat Joel , Underwood Sandra Millon , Wiehe Sarah 
Published: June 2024

ImportanceFalls are the leading cause of injury-related morbidity and mortality among older adults in the US. In 2018, 27.5% of community-dwelling adults 65 years or older reported at least 1 fall in the past year and 10.2% reported a fall-related injury. In 2021, an estimated 38 742 deaths resulted from fall-related injuries.ObjectiveThe US Preventive Services Task Force (USPSTF) commissioned a systematic review to evaluate the effectiveness and harms of primary care–relevant interventions to prevent falls and fall-related morbidity and mortality in community-dwelling adults 65 years or older.PopulationCommunity-dwelling adults 65 years or older at increased risk of falls.Evidence AssessmentThe USPSTF concludes with moderate certainty that exercise interventions provide a moderate net benefit in preventing falls and fall-related morbidity in older adults at increased risk for falls. The USPSTF concludes with moderate certainty that multifactorial interventions provide a small net benefit in preventing falls and fall-related morbidity in older adults at increased risk for falls.RecommendationThe USPSTF recommends exercise interventions to prevent falls in community-dwelling adults 65 years or older who are at increased risk for falls. (B recommendation) The USPSTF recommends that clinicians individualize the decision to offer multifactorial interventions to prevent falls to community-dwelling adults 65 years or older who are at increased risk for falls. Existing evidence indicates that the overall net benefit of routinely offering multifactorial interventions to prevent falls is small. When determining whether this service is appropriate for an individual, patients and clinicians should consider the balance of benefits and harms based on the circumstances of prior falls, presence of comorbid medical conditions, and the patient’s values and preferences. (C recommendation)
Ex vivo lipidomics reveal monoacylglycerols as substrates for a fatty acid amide hydrolase in the legume Medicago truncatula
Authors: Arias‐Gaguancela Omar , Herrell Emily , Chapman Kent D. 
Published: June 2024

Fatty acid amide hydrolase (FAAH) is a conserved hydrolase in eukaryotes with promiscuous activity toward a range of acylamide substrates. The native substrate repertoire for FAAH has just begun to be explored in plant systems outside the model Arabidopsis thaliana. Here, we used ex vivo lipidomics to identify potential endogenous substrates for Medicago truncatula FAAH1 (MtFAAH1). We incubated recombinant MtFAAH1 with lipid mixtures extracted from M. truncatula and resolved their profiles via gas chromatography–mass spectrometry (GC–MS). Data revealed that besides N‐acylethanolamines (NAEs), sn‐1 or sn‐2 isomers of monoacylglycerols (MAGs) were substrates for MtFAAH1. Combined with in vitro and computational approaches, our data support both amidase and esterase activities for MtFAAH1. MAG‐mediated hydrolysis via MtFAAH1 may be linked to biological roles that are yet to be discovered.