bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance of linear and non‐linear precoders in G.fast ultra‐broadband DSL networks
Authors: Chuah Teong Chee , Ng Yin Hoe , Zainal Abidin Ahmadun Nijar , Asrokin Azhari , Hashim Nabihah 
Published: July 2016

SummaryThe new International Telecommunication Union Telecommunication G.fast standard for next‐generation ultra‐broadband digital subscriber line systems has stipulated mandatory use of vectoring for crosstalk mitigation. In this paper, we study the performance of downstream precoders in G.fast networks utilising the extended bandwidth up to 212 MHz. In particular, the issue of strong crosstalk encountered in practical copper cable bundles at high frequencies giving rise to channel matrices which are not row‐wise diagonally dominant (RWDD) as predicted theoretically, as well as the ramification of deploying precoders designed based on the RWDD assumption in practical G.fast channels are studied. To serve these purposes, an enhanced stochastic far‐end crosstalk (FEXT) model which provides distinct FEXT transfer functions with the dispersion range characterised experimentally whilst encompassing the dual‐slope FEXT encountered in non‐RWDD cables is used for evaluating the performance of precoders in diverse G.fast deployment scenarios. Furthermore, the performance sensitivity of precoders under realistic amount of channel estimation errors is investigated on a common framework, allowing a direct and fair comparison between linear and non‐linear precoders. Results show that the nonlinear optimal precoder outperforms linear precoders in all channel conditions; however, the former is found to be slightly more sensitive to channel estimation errors on shorter loops. Copyright © 2016 John Wiley & Sons, Ltd.
Other specified and unspecified feeding or eating disorders among women in the community
Authors: Mustelin Linda , Lehtokari Vilma‐Lotta , Keski‐Rahkonen Anna 
Published: July 2016

ABSTRACTObjectiveTo examine the occurrence, course, and clinical picture of the DSM‐5 residual categories ‘Other Specified Feeding or Eating Disorder’ (OSFED) and ‘Unspecified Feeding or Eating Disorder’ (UFED), to describe potential subtypes, and to evaluate whether the subdivision of the residual category appears meaningful.MethodWe screened women from the 1975–79 birth cohorts of Finnish twins (N = 2825) for lifetime eating disorders using questionnaires and the SCID interview. This analysis characterizes women who reported clinically significant eating disorder symptoms but did not fulfill diagnostic criteria for DSM‐5 anorexia nervosa (AN), bulimia nervosa (BN), or binge eating disorder (BED).ResultsThirty‐eight women (21% of those with an eating disorder) fell in the residual OSFED/UFED category. A third of them (N = 14) fulfilled OSFED criteria, whereas two thirds (N = 24) fell in the UFED category. The lifetime prevalence of OSFED/UFED was 1.5% (95% CI 1.1–2.0%), less than half of the prevalence of DSM‐IV eating disorder not otherwise specified (EDNOS). The mean age of onset of OSFED/UFED was 18 years, median duration of symptoms was two years, and the 5‐year probability of recovery was 60%. Over a third of women with OSFED/UFED suffered from comorbid psychiatric disorders. Both residual categories were clinically heterogeneous and included atypical forms of AN, BN, and BED.ConclusionsApplying the DSM‐5 criteria in a community sample of young women more than halved the occurrence of residual eating disorder diagnoses, but resulted in two instead of one clinically heterogeneous residual categories. Nevertheless, residual eating disorders were associated with considerable clinical severity. © 2016 Wiley Periodicals, Inc. (Int J Eat Disord 2016; 49:1010–1017)
Cost‐utility of an internet‐based intervention with or without therapist support in comparison with a waiting list for individuals with eating disorder symptoms: a randomized controlled trial
Authors: Aardoom J.J. , Dingemans A.E. , van Ginkel J.R. , Spinhoven P. , Van Furth E.F. , Van den Akker‐van Marle M.E. 
Published: July 2016

ABSTRACTObjectiveTo investigate the cost‐utility of the internet‐based intervention “Featback” provided with different levels of therapist support, in comparison to a waiting list.MethodThis economic evaluation was conducted from a societal perspective and was part of a randomized controlled trial in which participants (N = 354) with self‐reported ED symptoms were randomized to: (1) 8 weeks of Featback, consisting of psychoeducation and a fully automated monitoring‐ and feedback system, (2) Featback with low‐intensity (weekly) therapist support, (3) Featback with high‐intensity (three times a week) therapist support, and (4) a waiting list. Participants were assessed at baseline, postintervention, and 3‐month follow‐up. Cost‐utility acceptability curves were constructed.ResultsNo significant differences between the study conditions were found regarding quality‐adjusted life‐years (P = 0.55) and societal costs (P = 0.45), although the mean costs per participant were lowest in the Featback condition with low‐intensity therapist support (€1951), followed by Featback with high‐intensity therapist support (€2032), Featback without therapist support (€2102), and the waiting list (€2582). Featback seemed to be cost‐effective as compared to the waiting list. No clear preference was found for Featback with or without therapist support.DiscussionA fully automated Internet‐based intervention for ED symptoms with no, low‐, or high‐intensity therapist support represented good value for money when compared to a waiting list. This finding may have important implications for clinical practice, as both the unguided‐ and guided intervention could allow for more efficient care and widespread dissemination, potentially increasing the accessibility and availability of mental health care services for individuals with ED symptoms. © 2016 Wiley Periodicals, Inc. (Int J Eat Disord 2016; 49:1068–1076)
Electrocatalytic Activity of Nanocomposites of Sulphur Doped Graphene Oxide and Nanosized Cobalt Phthalocyanines
Authors: Shumba Munyaradzi , Nyokong Tebello 
Published: July 2016

AbstractIn this work we explore the electrocatalytic activity of nanocomposites of reduced sulphur doped graphene oxide nanosheets (rSDGONS) and cobalt phthalocyanine (CoPc) or cobalt tetra amino phthalocyanine (CoTAPc) towards hydrogen peroxide. Transmission electron microscopy, scanning electron microscopy, X‐ray photon spectroscopy, X‐ray diffraction, chronoamperometry, linear scan voltammetry and cyclic voltammetry were used to characterize the nanocomposites. Nanosized CoPc showed superior (in terms of currents) electrocatalytic oxidation and reduction of hydrogen peroxide compared to CoTAPc nanoparticles (CoTAPcNP). The lowest detection limit was obtained for hydrogen peroxide oxidation on electrodes modified with CoPcNP‐rSDGONS at 1.49 µM. The same electrode gave a high adsorption equilibrium constant of 1.27×103 mol−1 and a Gibbs free energy of −17.71 kJ/mol, indicative of a spontaneous reaction on the electrode surface.
Electrochemical Biosensors Based on Enzymatic Reactors Filled by Various Types of Silica and Amalgam Powders for Measurements in Flow Systems
Authors: Josypčuk Oksana , Barek Jiří , Josypčuk Bohdan 
Published: July 2016

AbstractTwo enzymatic biosensors with amalgam powder reactors and twelve enzymatic biosensors with various silica powder reactors were fabricated and tested in this work. The enzymatic reactors based on silver amalgam powder provide high sensitivity and they are convenient for faster flow rates. Experiments with six silica materials showed that mesoporous silica SBA‐15 was the best one in terms of covering by enzymes, sensitivity and lifetime of biosensors. The current response of the SBA15‐glucose oxidase (GOx) sensor started to decrease only after 200 day testing and after 406 days the peak current was still 35.9 % of the initial value. The used amalgam tubular detector in a flow system allowed working at highly negative potentials, which significantly increased the sensitivity of determinations. Statistical results of parallel measurement of model solutions with the fabricated biosensors show their high accuracy (RSD=0.28–1.81 %) and sensitivity (6.2–14.3 µmol L−1). The proposed SBA15‐GOx biosensor was successfully used for determination of glucose in commercial honey.
Conductivity as a Sensor for Monitoring Relative Magnesium Corrosion Rates in Real‐time, in Serum‐containing Media under Cell Culture Conditions
Authors: Ojo Kolade , Hopkins Tracy , Joshi Madhura , Salunke Pravahan , Zhang Guangqi , Nahan Keaton , Zhang Zhannping , Zhao Daoli , Pixley Sarah K. , Shanov Vesselin , Heineman William R. 
Published: July 2016

AbstractBecause controlling the corrosion rate of magnesium metal will be crucial to the success of biomedical implants containing pure magnesium or magnesium alloys, many ways have been sought to improve in vitro tests to analyze corrosion rates, and also to identify new methods of preparing or post‐processing magnesium. In this work, for an in vitro assay, we explored the use of a commercially available conductivity sensor to study magnesium corrosion under cell culture conditions that duplicate many physiologically appropriate parameters. With this sensor, we studied the corrosion of two previously untested magnesium single crystal samples that differed in surface treatments that could alter corrosion rates. The results show that the relative conductivity changes in (mS/cm) over the total time of immersion were proportional to the corrosion rates in (mm/y) and also to the total magnesium released, as detected by inductively coupled plasma mass spectrometry (ICP‐MS).
Nanoparticle‐Stabilized Foam for Mobility Control in Enhanced Oil Recovery
Authors: Sun Qian , Zhang Na , Li Zhaomin , Wang Yuhe 
Published: July 2016

AbstractFoam stabilized by a surfactant has been used successfully for mobility control during enhanced oil recovery processes, but the stability of the foam limits its application. Aqueous foams prepared from dispersions of partially hydrophobic silicon dioxide (SiO2) nanoparticles and sodium dodecyl sulfate (SDS) anionic surfactant were studied and the injection behavior of foams stabilized by a solution of SDS or dispersion of SiO2/SDS were analyzed for comparison. Foam stability increased with increasing nanoparticle concentration although the feasibility of producing a foam (foamability) followed the opposite trend. The surface tension and interfacial dilatational rheological properties were affected by the addition of SiO2 nanoparticles. When 0.05 wt % SiO2 was added to the solution of SDS, the system's dilatational elasticity increased significantly, but not the dilatational viscosity. The sweep efficiency to dead end was very small, and the SiO2/SDS foam could displace more residual oil in the dead end than that in the SDS foam. The differential pressure could increase to 0.58 MPa when SDS foam was injected, but for the SiO2/SDS foam it could increase to 1.7 MPa. The SiO2/SDS foam exhibited better profile control performance than that of the SDS foam. When subsequent water was injected for 3.5 pore volumes, the flow rate of the high‐permeability sand pack could still be maintained at 1.0 mL min−1, which suggested that the SiO2/SDS foam had a better resistance to water flushing. Additionally, the foam volume should also be considered, especially for a SiO2 concentration of >1.5 wt %. SiO2/SDS foam can reduce the residual oil saturation clearly, and the enhanced oil recovery and final oil recovery can reach 36.90 and 69.57 %, respectively.
Effective Macroporous Core–Shell Structure of Alumina‐Supported Spinel Ferrite for Carbon Dioxide Splitting Based on Chemical Looping
Authors: Fu Yu , Li Shenggang , Zhang Jun , Sun Yuhan 
Published: July 2016

AbstractSpinel ferrite (NiFe2O4) supported on spherical Al2O3 was used to split CO2 based on chemical looping. The NiFe2O4/Al2O3 material, which had a macroporous core–shell structure, was obtained by pretreating the Al2O3 support at 1200 °C. It displays the highest redox capacity and the best reproducibility during the chemical looping amongst all the samples tested. However, the pretreatment of the Al2O3 support at other temperatures leads to structures that are unfavorable for the diffusion of CO2 and oxygen, which thus reduces the reactivity. N2 adsorption–desorption isotherms, XRD, field‐emission SEM, TEM, energy‐dispersive X‐ray spectroscopy, and X‐ray photoelectron spectroscopy were used to elucidate the formation of the macroporous core–shell structure and the other unfavorable structures. The initial structure, phase of the Al2O3 support, and the process of spinel formation in solid solutions influence the structural evolution of the NiFe2O4/Al2O3 materials significantly.
Gas Recirculation at the Hydrogen Electrode of Solid Oxide Fuel Cell and Solid Oxide Electrolysis Cell Systems
Authors: Henke M. , Hillius S. , Riedel M. , Kallo J. , Friedrich K. A. 
Published: July 2016

AbstractIn this study it is theoretically analyzed how flue gas recirculation at the hydrogen electrode of solid oxide cells (SOC) systems effects fuel utilization and carbon formation. Interdepence between cell fuel utilization, system fuel utilization and gas recirculation is investigated numerically. Tendency towards carbon deposits is evaluated via thermodynamic equilibrium calculations. It is quantified which gas recirculation rates are necessary to achieve high values of system fuel utilization even if the cell fuel utilization is kept at a moderate level. Furthermore, tendency towards carbon deposition strongly depends on temperature, pressure and feed gas composition and can be reduced by adequate recirculation rates. The presented results can be used for the configuration of gas recirculation in SOC systems.
A Practical Guide to High‐resolution X‐ray Spectroscopic Measurements and their Applications in Bioinorganic Chemistry
Authors: Kowalska Joanna K. , Lima Frederico A. , Pollock Christopher J. , Rees Julian A. , DeBeer Serena 
Published: July 2016

AbstractThe bioinorganic chemistry community has had a long history of utilizing a diverse range of spectroscopic techniques to obtain detailed geometric and electronic structural insights into metalloprotein active sites. In recent years, the development of beamlines optimized for high‐resolution X‐ray spectroscopy has provided novel tools for the elucidation of biological active site structures. These methods include both non‐resonant and resonant X‐ray emission spectroscopy. Herein, we briefly introduce both X‐ray absorption and X‐ray emission spectroscopy, and the added information that can be obtained through high‐resolution measurements. The information content of each spectroscopic approach, as well as the required instrumentation, is discussed. Applications of these methods in bioinorganic chemistry are highlighted.
Oxygen, water, and sodium chloride transport in soft contact lenses materials
Authors: Gavara Rafael , Compañ Vicente 
Published: July 2016

AbstractOxygen permeability, diffusion coefficient of the sodium ions and water flux and permeability in different conventional hydrogel (Hy) and silicone‐hydrogel (Si‐Hy) contact lenses have been measured experimentally. The results showed that oxygen permeability and transmissibility requirements of the lens have been addressed through the use of siloxane containing hydrogels. In general, oxygen and sodium chloride permeability values increased with the water content of the lens but there was a percolation phenomenon from a given value of water uptake mainly in the Si‐Hy lenses which appeared to be related with the differences between free water and bound water contents. The increase of ion permeability with water content did not follow a unique trend indicating a possible dependence of the chemical structure of the polymer and character ionic and non‐ionic of the lens. Indeed, the salt permeability values for silicone hydrogel contact lenses were one order of magnitude below those of conventional hydrogel contact lenses, which can be explained by a diffusion of sodium ions occurring only through the hydrophilic channels. The increase of the ionic permeability in Si‐Hy materials may be due to the confinement of ions in nanoscale water channels involving possible decreased degrees of freedom for diffusion of both water and ions. In general, ionic lenses presented values of ionic permeability and diffusivity higher than most non‐ionic lenses. The tortuosity of the ionic lenses is lower than the non‐ionic Si‐Hy lenses. Frequency 55 and PureVision exhibited the highest water permeability and flux values and, these parameters were greater for ionic Si‐Hy lenses than for ionic conventional hydrogel lenses. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2218–2231, 2017.
Observed changes in extreme temperature and precipitation over Indonesia
Authors: Supari  , Tangang Fredolin , Juneng Liew , Aldrian Edvin 
Published: July 2016

ABSTRACTThis paper documents the changes in climate extremes over Indonesia during the past three decades (1983–2012) based on a subset of extreme indices recommended by the Expert Team on Climate Change Detection and Indices (ETCCDI). The extreme indices were calculated based on the quality controlled daily observational data (minimum and maximum temperature and precipitation) from 88 weather stations. Overall, we found significant and spatially coherent trends of warming in the temperature indices over Indonesia, consistent with other studies conducted at different countries within the Southeast Asia. The frequency of cool days (TX10p) and cools nights (TN10p) had decreased whereas warm days (TX90p) and warm nights (TN90p) were observed more frequently. Averaged over the country, the annual mean of daily maximum (TXmean) and minimum temperature (TNmean) had increased significantly by 0.18 and 0.30 °C decade−1, respectively. Other temperature indices also showed significant warming trends. In contrast, trends in the precipitation extremes indices were generally not significant and less spatially coherent. However, a tendency towards wetter conditions was observed, in agreement with the results at the global scale. The daily precipitation intensity (SDII) had increased significantly over the country by 0.21 mm day−1 decade−1 during the period studied. At the regional scale, we observed a significant wetting trend in the annual highest daily amount (RX1day) and the rainfall amount contributed by the extremely very wet days (R99p) in the northern part of the country. The wetting trends of a number of extreme precipitation indices were depicted prominently in December–January–February (DJF) and/or March–April–May (MAM) seasons, both at country and regional levels. However, for the southern region of Indonesia, a drying tendency was observed for June–July–August (JJA), September–October–November (SON) and MAM.
Cost utility analysis of endoscopic sinus surgery for chronic rhinosinusitis with and without nasal polyposis
Authors: Scangas George A. , Remenschneider Aaron K. , Su Brooke M. , Shrime Mark G. , Metson Ralph 
Published: July 2016

ObjectiveTo evaluate the cost‐effectiveness of endoscopic sinus surgery (ESS) compared to medical therapy for patients with chronic rhinosinusitis (CRS) with and without nasal polyposis (NP).Study DesignCohort‐style Markov decision‐tree economic model with a 36‐year time horizon.MethodsTwo cohorts of 229 CRS patients with and without NP who underwent ESS were compared with a matched cohort of 229 CRS patients from the Medical Expenditures Survey Panel database (Agency for Healthcare Research and Quality, Rockville, MD) who underwent medical management. Utility scores were calculated from sequential patient responses to the EuroQol five‐dimensions questionnaire. Decision‐tree analysis and a 10‐state Markov model utilized published event probabilities and primary data to calculate long‐term costs and utility. The primary outcome was the incremental cost per quality‐adjusted life year (QALY). Thorough sensitivity analyses were performed.ResultsThe reference case for CRS with NP yielded an incremental cost‐effectiveness ratio (ICER) for ESS versus medical therapy of $5,687.41/QALY. The reference case for CRS without NP yielded an ICER of $5,405.44/QALY. The cost‐effectiveness acceptability curve in both cases demonstrated 95% certainty that the ESS strategy was the most cost‐effective option at a willingness‐to‐pay threshold of $20,000/QALY or higher. These results were robust to one‐way and probabilistic sensitivity analysis.ConclusionThis study demonstrates the cost‐effectiveness of ESS compared to medical therapy alone for the management of CRS patients both with and without NP. The presence of nasal polyps was not found to affect the overall cost‐effectiveness of ESS.Level of Evidence2C. Laryngoscope, 127:29–37, 2017
Transient processes of MoS2 tribofilm formation under boundary lubrication
Authors: Rai Y. , Neville A. , Morina A. 
Published: July 2016

AbstractA tribochemistry study that involves the application of Raman spectroscopy surface analysis has been undertaken to understand the time‐dependent tribochemical reactions, for lubrication by Molybdenum dialkyl‐dithiocarbamate (MoDTC) occurring in boundary lubricated conditions. Under the conditions of rubbing and high temperature, time‐resolved Raman spectroscopy results show the intermediate steps that lead to the MoDTC additive to be tribochemically structured on the wear scar of the contacting surface. A MoS2 tribofilm with a lattice layer structure is observed on the wear scar whenever the lowest friction was achieved. An apparent shift of the A1g and E2g Raman modes, indicating qualitative and quantitative information on the MoS2 tribofilm formed, is observed to be related to low friction. Detailed analyses of Raman spectra obtained on wear scars at different test durations and temperatures indicate that both temperature and rubbing are needed for the formation of low friction MoS2 tribofilm. Copyright © 2016 John Wiley & Sons, Ltd.
Isolation of a novel alginate lyase‐producing Bacillus litoralis strain and its potential to ferment Sargassum horneri for biofertilizer
Authors: Wang Mingpeng , Chen Lei , Liu Zhengyi , Zhang Zhaojie , Qin Song , Yan Peisheng 
Published: July 2016

AbstractAlgae have long been used to augment plant productivity through their beneficial effects. Alginate oligosaccharide is believed to be one of the important components to enhance growth and crop yield. In this study, we isolated and characterized a Bacillus litoralis strain, named Bacillus M3, from decayed kelps. We further demonstrated that the M3 strain could secrete alginate lyase to degrade alginate. The crude enzyme exhibited the highest activity (33.74 U/mg) at pH 7.0 and 50°C. The M3 strain was also able to ferment the brown alga Sargassum horneri. Fermentation results revealed that a fermentation period of 8–12 hr was the best harvest time with the highest level of alginate oligosaccharides. Plant growth assay showed that the seaweed fermentation extract had an obvious promotion effect on root and seedling growth of Lycopersicon eseulentum L. Our results suggest that fermentation extract of Sargassum horneri by the novel strain of Bacillus litoralis M3 has significant development potential for biofertilizer production and agriculture application.