bluuebunny/crossref_metadata_2025_split huggingface dataset:
Clinical Manifestations in Ten Patients with Asymptomatic Metal-on-Metal Hip Arthroplasty with Very High Cobalt Levels
Authors: van Lingen Christiaan P. , Ettema Harmen B. , Timmer Jorik R. , de Jong Gosse , Verheyen Cees C.P.M. 
Published: October 2013

Reports of adverse reactions to metal particle debris with metal-on-metal (MoM) hip arthroplasty have increased recently. Apart from the formation of pseudotumours and higher revision rates, another major cause for concern are the systemic effects of metal ions. Several effects of elevated systemic cobalt ions have been reported (e.g. myocardial and neurological effects, hypothyroidism). All 643 patients who underwent a stemmed large head MoM total hip replacement in our clinic were screened with repeated whole blood samples of metal ions (cobalt, chromium). We included ten asymptomatic unrevised patients with the highest cobalt concentrations, determined at a minimum of three years after implantation. These patients were subjected to an extensive neurological and cardiological screening protocol. In addition, blood samples were taken to assess renal and thyroid function. Ten patients with a cobalt level of 18–153 µg/L (mean 46.8 µg/L) were included. Nine patients were female, mean age was 65 years (range 56–75). The mean follow-up period was 4.2 years (range 3.0–6.1). Seven patients had bilateral stemmed MoM hip arthroplasty. No signs or symptoms of neurological dysfunction, cardiomyopathy, or renal or thyroid dysfunction could be identified or attributed to elevated cobalt levels. The clinical relevance of this study is that after short-term follow-up highly elevated blood cobalt levels do not cause systemic effects in our population. Hence in asymptomatic patients metal ions appear not to be a significant factor in the decision of when to revise a MoM large head total hip replacement.
The Presence of Anti-HLA Donor-Specific Antibodies in Lung Allograft Recipients Does Not Correlate With C4d Immunofluorescence in Transbronchial Biopsy Specimens
Authors: Roberts Jordan A. , Barrios Roberto , Cagle Philip T. , Ge Yimin , Takei Hidehiro , Haque Abida K. , Burns Kevin M. , Land Geoffrey A. , Dilioglou Smaroula , Bernard David W. 
Published: October 2013

Context.—C4d immunofluorescence (IF) is a surrogate for development of donor-specific antibodies (DSAs) against human leukocyte antigen (HLA) class I and II antigens in kidney and heart biopsy specimens for monitoring of antibody-mediated (humoral) allograft rejection (AMR). Use of C4d IF in monitoring of lung allografts has shown conflicting results.Objective.—To determine if C4d IF can be used as a reliable marker for AMR and if it correlates with the presence of DSAs and histologic findings on biopsy.Design.—All transbronchial biopsies in lung allograft recipients, performed at our institution in a 3-year period, were reviewed. A cohort of 92 patients with 110 corresponding biopsies met the inclusion criteria of (1) having a resulted DSA within 2 weeks of biopsy and (2) having C4d immunofluorescence studies performed and confirmed.Results.—Twenty-nine patients (31.5%) were positive for DSAs and 63 patients (68.5%) did not develop DSAs. Positive C4d capillary IF was seen in 18 of 110 total biopsy specimens (16.4%). Eight of these biopsy samples were from patients positive for DSAs and 10 were from patients negative for DSAs. The correlation coefficient between the presence of DSAs and C4d IF was 0.1628 (P = .09).Conclusions.—A significant proportion of DSA-positive patients had negative C4d IF results and frequently have no histologic changes on biopsy specimens. DSA-negative patients can be positive for C4d and may show the same histologic changes as reported for DSA-positive patients. Diagnosis of AMR in lung may require a collaborative approach combining clinical data, DSA status, and histology.
Determination of Paraquat (Herbicide) Residue Level in Sandy Clay Loam Soil Using High Performance Liquid Chromatography
Authors: Y.C. Wong  , N. Norsyamimi  , W.A. Wan-Nurdiyana  
Published: October 2013

Pesticide is considered as the most widely used form of agricultural chemical. Pesticide residue is the remaining pesticide on or in soil after pesticide is applied on agriculture soil. Soil is a component that is crucial to life. The research purposely concerned on major effects that could be contributed from medium to unlimited application of pesticide. The soil samples were systematically collected from 5 plots and Paraquat residues concentrations were determined in dissimilar depth of soil layers. The herbicide used was Paraquat that contained Paraquat Dichloride. High Performance Liquid Chromatography (HPLC) analysis detected the peak area volumes of Paraquat in soil samples at level ranging from 0.3 to 5.9 mg/l. The concentration of Paraquat in sandy clay loam soil showed that herbicide leached downward to the depth of 15 cm. The maximum concentration of Paraquat residue was detected at 0 to15 cm of soil depth at 2.783 mg/l. In highly organic soils, adsorption is weaker and Paraquat remains herbicidally active for longer, up to 29 days in one trial on soil with 98% organic matter [1]. Oral dose, LD50 for human is equal to 40-60 mg/kg [2] while the lowest fatal dose recorded for human was 17 mg/kg, but even lower doses may be fatal for children [3].
Prevention program at construction worksites aimed at improving health and work ability is cost‐saving to the employer: Results from an RCT
Authors: Oude Hengel K.M. , Bosmans J.E. , Van Dongen J.M. , Bongers P.M. , Van der Beek A.J. , Blatter B.M. 
Published: October 2013

AbstractBackgroundTo prolong sustainable healthy working lives of construction workers, a prevention program was developed which aimed to improve the health and work ability of construction workers. The objective of this study was to analyze the cost‐effectiveness and financial return from the employers' perspective of this program.MethodsA total of 293 workers in 15 departments were randomized to the intervention (n = 8 departments) or control group (n = 7). Data on work ability and health were collected using questionnaires. Sick leave data were obtained from the companies. Both the cost‐effectiveness analyses and return on investment analyses were performed.ResultsAfter 12 months, the absenteeism costs were significantly lower in the intervention group than in the control group. At 12‐month follow‐up, no significant differences were found with respect to the primary outcomes (work ability, mental and physical health status) and secondary outcomes (musculoskeletal symptoms), meaning that the intervention was not cost‐effective in comparison with the control group. The net‐benefit was €641 per worker, and the intervention generated a positive financial return to the employer.ConclusionThe intervention in the present study was cost‐saving to the employer due to reduced sickness absenteeism costs in the intervention group compared with the control group. However, the intervention cannot be regarded as cost‐effective as no significant effects were found for work ability and health. Am. J. Ind. Med. 57:56–68, 2014. © 2013 Wiley Periodicals, Inc.
Parkinson's Disease and Occupation: Differences in Associations by Case Identification Method Suggest Referral Bias
Authors: Teschke Kay , Marion Stephen A. , Tsui Joseph K.C. , Shen Hui , Rugbjerg Kathrine , Harris M. Anne 
Published: October 2013

AbstractMethodsWe used a population‐based sample of 403 Parkinson's disease cases and 405 controls to examine risks by occupation. Results were compared to a previous clinic‐based analysis.ResultsWith censoring of jobs held within 10 years of diagnosis, the following had significantly or strongly increased risks: social science, law and library jobs (OR = 1.8); farming and horticulture jobs (OR = 2.0); gas station jobs (OR = 2.6); and welders (OR = 3.0). The following had significantly decreased risks: management and administration jobs (OR = 0.70); and other health care jobs (OR = 0.44).ConclusionsThese results were consistent with other findings for social science and farming occupations. Risks for teaching, medicine and health occupations were not elevated, unlike our previous clinic‐based study. This underscores the value of population‐based over clinic‐based samples. Occupational studies may be particularly susceptible to referral bias because social networks may spread preferentially via jobs. Am. J. Ind. Med. 57:163–171, 2014. © 2013 Wiley Periodicals, Inc.
Workplace mistreatment and sickness absenteeism from work: Results from the 2010 National Health Interview survey
Authors: Asfaw Abay G. , Chang Chia C. , Ray Tapas K. 
Published: October 2013

AbstractObjectiveThis study examined the association between workplace mistreatment and occurrence, duration, and costs of sickness absenteeism.MethodsWe used the 2010 National Health Interview Survey and considered 13,807 employed adult respondents. We used a zero‐inflated negative binomial (zinb) model to examine the association between exposure to workplace mistreatment and the occurrence and number of workdays missed due to illness/injury in the preceding 12 months.ResultsIn 2010, 7.6% of US workers employed at the time of the survey reported having been mistreated at their workplace. Both occurrence and duration of sickness absence were higher for mistreated than for non‐mistreated workers. The zinb results showed that being mistreated was associated with a 42% increase in the number of missed workdays, controlling for covariates. The marginal effect analysis showed that lost workdays differed by 2.45 days between mistreated and non‐mistreated workers. This implies that workplace mistreatment was associated with $4.1 billion, or 5.5%, of sickness absenteeism costs in 2010.ConclusionsWorkplace mistreatment is associated with sickness absence in the United States. While a causal relationship could not be established due to the cross‐sectional design of the study, this study reveals the economic importance of developing workplace mistreatment prevention strategies. Am. J. Ind. Med. 57:202–213, 2014. Published 2013. This article is a U.S. Government work and is in the public domain in the USA.
Job stress and work‐related musculoskeletal symptoms among intensive care unit nurses: a comparison between job demand‐control and effort‐reward imbalance models
Authors: Lee Soo‐Jeong , Lee Joung Hee , Gillen Marion , Krause Niklas 
Published: October 2013

BackgroundThe aims of this study were to compare job demand‐control (JDC) and effort‐reward imbalance (ERI) models in examining the association of job stress with work‐related musculoskeletal symptoms and to evaluate the utility of a combined model.MethodsThis study analyzed cross‐sectional survey data obtained from a nationwide random sample of 304 intensive‐care unit (ICU) nurses. Demographic and job factors were controlled in the analyses using logistic regression.ResultsBoth JDC and ERI variables had strong and statistically significant associations with work‐related musculoskeletal symptoms. Effort‐reward imbalance had stronger associations than job strain or iso‐strain with musculoskeletal symptoms. Effort‐reward imbalance alone showed similar or stronger associations with muscusloskeletal symptoms compared to combined variables of the JDC and ERI models.ConclusionsThe ERI model appears to capture the magnitude of the musculoskeletal health risk among nurses associated with job stress at least as well and possibly better than the JDC model. Our findings suggest that combining the two models provides little gain compared to using effort‐reward imbalance only. Am. J. Ind. Med. 57:214–221, 2014. © 2013 Wiley Periodicals, Inc.
Growth and fluctuating asymmetry of human newborns: Influence of inbreeding and parental education
Authors: Özener Bariş , Graham John H. 
Published: October 2013

ABSTRACTHistorically, medical concerns about the deleterious effects of closely inbred marriages have focused on the risk posed by recessive Mendelian disease, with much less attention to developmental instability. We studied the effects of inbreeding (first‐cousin marriage) on growth and fluctuating asymmetry of 200 full‐term infants (101 inbred and 99 outbred) whose parents were of similar socioeconomic status in Sivas Province, Turkey. In addition to differences in their mean inbreeding coefficients (f= 1/16 for first cousins andf< 1/1,024 for unrelated parents), the consanguineous parents were less well educated (3 years, on average for both husbands and wives). We measured weight, height, head circumference, and chest circumference of the newborns, as well as four bilateral traits (ear width, ear length, and second and fourth digit lengths). After taking education into account, none of the measures of size (weight, height, head circumference, and chest circumference) and fluctuating asymmetry differed between the inbred and outbred groups. Male children of well‐educated parents, however, were larger and had less fluctuating asymmetry. Female children of well‐educated parents weighed more than those of less well‐educated parents, but were otherwise indistinguishable for height, head circumference, chest circumference, and fluctuating asymmetry. We conclude that inbreeding depression causes neither an increase in fluctuating asymmetry of full‐term newborns, nor a decrease in body size. Unmeasured variables correlated with education appear to have an effect on fluctuating asymmetry and size of male children and only a weak effect on size (weight) of female children. Am J Phys Anthropol 153:45–51, 2014. © 2013 Wiley Periodicals, Inc.
Effect of membranes on oxygen transfer rate and consumption within a newly developed three‐compartment bioartificial liver device: Advanced experimental and theoretical studies
Authors: Hilal‐Alnaqbi Ali , Mourad Abdel‐Hamid I. , Yousef Basem F. 
Published: October 2013

AbstractA mathematical model is developed to predict oxygen transfer in the fiber‐in‐fiber (FIF) bioartificial liver device. The model parameters are taken from the constructed and tested FIF modules. We extended the Krogh cylinder model by including one more zone for oxygen transfer. Cellular oxygen uptake was based on Michaelis–Menten kinetics. The effect of varying a number of important model parameters is investigated, including (1) oxygen partial pressure at the inlet, (2) the hydraulic permeability of compartment B (cell region), (3) the hydraulic permeability of the inner membrane, and (4) the oxygen diffusivity of the outer membrane. The mathematical model is validated by comparing its output against the experimentally acquired values of an oxygen transfer rate and the hydrostatic pressure drop. Three governing simultaneous linear differential equations are derived to predict and validate the experimental measurements, e.g., the flow rate and the hydrostatic pressure drop. The model output simulated the experimental measurements to a high degree of accuracy. The model predictions show that the cells in the annulus can be oxygenated well even at high cell density or at a low level of gas phase PG if the value of the oxygen diffusion coefficient Dm is 16 × 10−5. The mathematical model also shows that the performance of the FIF improves by increasing the permeability of polypropylene membrane (inner fiber). Moreover, the model predicted that 60% of plasma has access to the cells in the annulus within the first 10% of the FIF bioreactor axial length for a specific polypropylene membrane permeability and can reach 95% within the first 30% of its axial length.
Structural, surface and catalytic properties of pure and ZrO2‐doped nanosized cobalt‐manganese mixed oxides
Authors: Ibrahim Shaimaa M. , Badawy Abdelrahman A. , El‐Shobaky Gamil A. , Mohamed Heba A. 
Published: October 2013

AbstractThe role of ZrO2‐doping of CoO–Mn2O3 system on its structural, surface and catalytic properties was studied using XRD, EDX, nitrogen adsorption at −196°C and H2O2‐decomposition at 30–50°C. The results revealed that all solids calcined at 300–500°C consisted of nanosized Co2MnO4 as a major phase together with Co3O4 phase. The surface and bulk compositions of pure and variously doped solids were completely different from each other's. The concentration of surface manganese species was much higher than that of cobalt. The addition of the smallest amount of ZrO2 (0.75 mol%) much increased the surface concentration of manganese species. The increase of calcination temperature of all solids increased progressively the catalytic activity which increased by doping with the smallest amount of ZrO2 then decreased by doping with further amounts of ZrO2 dopant falling to values smaller than that measured for pure sample.
Differential scanning calorimetry analysis of W/O emulsions prepared by miniature scale magnetic agitation and microfluidics
Authors: Lignel Sarah , Drelich Audrey , Sunagatullina Dinara , Clausse Danièle , Leclerc Eric , Pezron Isabelle 
Published: October 2013

AbstractUnderstanding and modelling the mechanism of destabilisation of complex and opaque water‐in‐oil emulsions is very challenging. The purpose of our current study is to develop experiments to restrict the number of destabilisation mechanisms that take place in order to better understand their role in the evolution of model emulsions. We focused particularly on the effects of droplet size increase and of droplet sedimentation, which can be observed when the emulsion ages. The evolution of the water in oil emulsion was characterised by following the displacement of the water freezing transition with time by Differential Scanning Calorimetry. We present the results obtained on two different systems: first on emulsions prepared in a miniature cell with an integrated magnetic stirrer designed for experiments on ground and under microgravity conditions (FASES program). In addition, the first results obtained with a microfluidic device, in order to generate dispersed water droplets of uniform size and determine the most probable freezing temperature of the water droplets as a function of their size, are displayed.
Visible‐near infrared concealment of cotton/nylon fabrics using colored pigments and multiwalled carbon nanotube particles (MWCNTs)
Authors: Khajeh Mehrizi M. , Bokaei F. , Jamshidi N. 
Published: October 2013

AbstractTo match the reflectance profile of desert colors including dark brown, light brown and olive green in the visible‐near IR (Vis‐NIR) bands, five selected colored pigments were utilized to print woven cotton/nylon fabrics. Multi‐walled carbon nanotube particles (MWCNT's) were also added to some of the printing pastes. The reflectance of printed fabrics was evaluated by using spectrophotometric technique. The effect of adding MWCNT's, on washing; light and crocking fastness alongside with colorimetric values of printed samples was evaluated. Furthermore, the water absorption time was measured in order to determine wettability of each printed sample. The results demonstrated that the presence of MWCNT's in concentration range of 0.04–0.12 g kg−1 in printing formulations was found to cause considerable decline in Near Infrared (NIR) reflectance while a surprising increase in visible reflectance of samples was observed. Color characteristics of printed fabrics were noticeably changed even at concentrations as low as 0.12 g kg−1 MWCNTs in printing formulations. Presence of MWCNTs in printing formulations was found to cause a significant increase in wetting time of samples. Also, the results indicated that air permeability of printed samples containing MWCNT's were higher than samples printed with no MWCNTs. Phenomena imposed by MWCNT's presence on pigment printed samples showed very good fastness levels in crocking, washing and light fastness tests. In dark brown sample, adding MWCNTs to the pigment printing pastes could tune the overall reflectance in order to match the standard reflectance profile accepted for use in concealment color of desert areas. © 2013 Wiley Periodicals, Inc. Col Res Appl, 40, 93–98, 2015
Enhanced information throughput in multiple input multiple output orthogonal frequency division multiplexing based systems using fractional sampling and iterative signal processing
Authors: Sharma Shree Krishna , Patwary Mohammad , Abdel‐Maguid Mohamed 
Published: October 2013

ABSTRACTHerein, we study the feasibility of enhanced information throughput capability of multiple input multiple output orthogonal frequency division multiplexing (MIMO‐OFDM) based wireless communication systems in the context of increasing wireless capacity demand. The concept of fractional sampling (FS) is exploited for this purpose to take advantage of diversity created because of it. Furthermore, a novel channel adaptive iterative sequence detector is proposed using the FS technique. The performance analysis of the proposed receiver is carried out, and a tighter performance bound is derived. It is found that the FS technique can improve bit error rate performance of MIMO and OFDM based systems provided that the noise samples are uncorrelated up to a certain level of FS rate. Moreover, it is observed that the performance improvement is a non‐linear function of the FS rate. Besides this, the simulation results show that the proposed iterative receiver can significantly enhance the information throughput of MIMO‐OFDM based wireless communication systems in comparison to conventional non‐iterative receivers. Copyright © 2013 John Wiley & Sons, Ltd.
Frequency allocation game in satisfaction form
Authors: Ellingsæter Brage 
Published: October 2013

ABSTRACTIn this paper, we analyse frequency allocation in wireless networks through a game in satisfaction form. Satisfaction form games are games without any optimisation aspects where a player is either satisfied or not. We show that such a formulation is especially suited for frequency allocation with quality‐of‐service constraints. We investigate different equilibrium concepts and show that there exists a mixed‐strategy distribution where all players are satisfied with a probability not less than a certain threshold. In the case where there exists a pure‐strategy action profile that can achieve satisfaction for all players, we present a learning algorithm that guarantees convergence to this action profile in finite time. In the case that no such pure‐strategy action profile exists, we show that the satisfaction form formulation possesses an action profile yielding higher utility for unsatisfied players compared with a normal form game. Lastly we show extensive simulation results that highlight the differences between a frequency allocation game in satisfaction form compared with other game formulations. Copyright © 2013 John Wiley & Sons, Ltd.
Information‐centric networking and multimedia services: present and future challenges
Authors: Piro Giuseppe , Grieco Luigi Alfredo , Boggia Gennaro , Chatzimisios Periklis 
Published: October 2013

ABSTRACTThe emerging information‐centric networking (ICN) paradigm is gaining worldwide the attention of academia and industrial research communities, thanks to its inherent ability to support also the next generation information and communication technology services beyond the current host‐centric Internet rationale. In this context, significant scientific efforts are being devoted to the investigation of ICN‐based multimedia systems because they represent the most popular use case for Internet users. In order to offer a unifying view on such valuable contributions, this paper presents a thorough review of the state of the art, a comprehensive framework to classify the most significant proposals, an overlook at the road ahead towards mature ICN‐based multimedia systems and a critical discussion on available tools. Our final wish is twofold: from one hand, this paper will provide a useful starting point for beginners in the field; whereas, from the other hand, it will help researchers already working on ICN‐related topics in finding a common agreement on participated scientific activities. Copyright © 2013 John Wiley & Sons, Ltd.