bluuebunny/crossref_metadata_2025_split huggingface dataset:
QoE and energy efficiency aware resource allocation for OFDM systems in group mobility environments
Authors: Zhang Yueying , Long Hang , Peng Yuexing , Vasilakos Athanasios V. , Wang Wenbo 
Published: April 2013

SUMMARYThe global information and communication technology industry is a fast growing contributor to the electrical energy consumption, especially for the base stations, accounting for a substantial amount of the energy use. Inherently, a resource allocation strategy including subchannels blackout would reduce energy consumption. In this paper, energy efficient resource allocation algorithms are addressed for the OFDM system in group mobility environments, suffering from high intercarrier interference. We first propose the subchannels blackout scheme to save energy implicitly without performance degradation by turning off certain subchannels when transmitting signals. Then, resource allocation scheme in combination with subchannels blackout scheme is developed, consisting of intergroup subchannels allocation and inner‐group subchannels blackout. Its advantage is twofold. (i) Energy consumption is reduced obviously; (ii) intercarrier interference is decreased and channel quality is enhanced simultaneously. However, the original transmit rate decreases with the decrease of active resources. We also prove under subchannels blackout scheme, achieved throughput and perceptual quality of experience (QoE) are quasiconcave in energy saving percentage, which reflects the number of blackout subchannels. We then present two energy efficient resource allocation algorithms. Both algorithms focus on the optimal solution by using an iteration method. The difference lies in the objective. One tries for energy consumption minimization above the satisfactory QoE level, but the other aims to maximize QoE perceived by users. Numerical results confirm the theoretical findings and demonstrate the promising energy‐saving capability with satisfying QoE of the proposed resource allocation schemes. Copyright © 2013 John Wiley & Sons, Ltd.
Multifunctional Periodic Mesoporous Organosilicas for Biomolecule Recognition, Biomedical Applications in Cancer Therapy, and Metal Adsorption
Authors: Moorthy Madhappan Santha , Kim Mi‐Ju , Bae Jae‐Ho , Park Sung Soo , Saravanan Nagappan , Kim Sun‐Hee , Ha Chang‐Sik 
Published: April 2013

AbstractThis paper reports a new approach towards the construction of a multifunctional periodic mesoporous organosilica (PMO), which integrates a range of advantages, such as mesoporous structural order, selective nucleobase‐recognition properties, stimuli‐responsive site‐specific delivery of anticancer agents to cancer tissues, and Cu2+ adsorption, into a single entity. First, the appropriate organic‐functional‐receptor precursor was synthesized by a chemical process and used to fabricate a multifunctional pyridine‐containing PMO material (DMPy‐PMO) by a hydrolysis and condensation route. The designed organic–inorganic hybrid mesoporous silica chemosensor showed an intrinsic selective recognition of nucleobase, specifically thymidine, through multipoint hydrogen‐bonding interactions with suitably arrayed receptor sites loaded into the rigid silica framework. An in vitro cytotoxicity test showed that the designed chemosensor materials have good biocompatibility and, therefore, could be promising candidates for the delivery of a range of therapeutic agents. Confocal laser scanning microscopy (CLSM) confirmed that the material can be internalized effectively by cancer cells (MCF‐7 cells). In addition, the DMPy‐PMOs showed efficient Cu2+ ion removal capacity at pH 5.0 with significantly high levels of adsorption (0.95 mmol g–1). These results suggest that the prepared multifunctional PMO hybrid has potential use as a smart material for a range of applications, such as biomolecule recognition, biomedical applications, and as an efficient adsorbent for the removal of metal ions.
Group 5 Imides and Bis(imide)s as Selective Hydrogenation Catalysts
Authors: Gianetti Thomas L. , La Pierre Henry S. , Arnold John 
Published: April 2013

AbstractIn this microreview, we focus on our work on the development of group 5 imido and bis(imido) semihydrogenation catalysts in the context of previous stoichiometric studies on d0 metal–ligand multiple‐bond activations of strong σ bonds and both stoichiometric and catalytic studies on H2 activation and hydrogenation by d2 group 5 complexes. These studies develop electronic structure models and mechanistic analyses necessary for the application of catalytic reactions involving 1,2‐addition reactions of σ‐bonded substrates across early transition metal–ligand multiple bonds. Extension of these studies to the second and third row group 5 imido complexes has led to the development of mechanistically distinct hydrogenation catalysts with product selectivities not readily obtainable with traditional late transition‐metal catalysts that employ H2 as the reductant.
Oxido‐ and Sulfidoniobium(V) N,N‐Diethylcarbamates: Synthesis, Characterization and DFT Study
Authors: Bortoluzzi Marco , Ghini Franco , Hayatifar Mohammad , Marchetti Fabio , Pampaloni Guido , Zacchini Stefano 
Published: April 2013

AbstractN,N‐Diethylcarbamates [NbE(O2CNEt2)3] (E = O, S) have been prepared in high yields by treating NbOCl3 or [NbSCl3(CH3CN)2] with CO2/NHEt2 in toluene at approximately –10 °C. The products were characterized by spectroscopic techniques, elemental analysis and X‐ray diffractometry in the case of [NbO(O2CNEt2)3]. The molecular structure of the latter consists of a niobium centre coordinated to the oxido moiety and six O atoms belonging to bridging and bidentate carbamates, in a slightly distorted pentagonal‐bipyramidal arrangement. The structures of both [NbE(O2CNEt2)3] compounds were reproduced by DFT calculations, which show substantial similarity despite the different nature of the chalcogen atoms.
Chemical and sensory assessment of deep‐frying oil alternatives for the processing of French fries
Authors: Petersen Katharina Domitila , Jahreis Gerhard , Busch‐Stockfisch Mechthild , Fritsche Jan 
Published: April 2013

The aim of the study was to evaluate volatile compounds as marker compounds for the edible oil deterioration during the production of deep‐fried French fries. Additionally the sensory characteristics (taste and smell) were assessed and results were compared with the results of the volatile compound analysis. A 32‐h deep‐frying experiment was performed and different frying oils, namely sunflower oil (SF), high‐oleic sunflower oil (HOSF), rapeseed oil (RO), high‐oleic rapeseed oil (HORO), and palm olein, were subsequently analyzed for their oxidative properties by the determination of their total polar material (TPM), polymerized triglycerides (PTG), peroxide value, anisidine value, as well as the fatty acid composition. In addition, analysis of the volatile compounds derived from the thermal degradation of the frying oils was performed by means of headspace‐GC/MS techniques (HS‐SPME‐GC/MS and DHS‐GC/MS). Multivariate statistical methods (principal component analysis with VARIMAX rotation) were applied to identify sensitive volatile lipid degradation indicators, enabling a differentiation of the various frying oils of different degrees of lipid oxidation just after 3 h of deep‐frying. E,E‐2,4‐decadienal and heptanal showed the greatest ability to differentiate between samples of various oxidative states, whereas E,E‐2,4‐heptadienal and E‐2‐decenal showed a reasonable correlation with well‐known lipid oxidation parameters, e.g., values for PTG or TPM. In addition to the chemical evaluation of the frying oils, the produced French fries were evaluated in terms of their taste and smell by an advanced scientific sensory method (balanced incomplete block design). French fries produced in conventional vegetable oils (SF and RO) were differentiated earlier from those prepared in fresh reference oil compared to HOSF and HORO. The perception of the French fries prepared in HOSF was comparable to those prepared in palm olein. Therefore, high‐oleic vegetable oils, especially high‐oleic SF, provide a frying oils alternative for the production of deep‐fried French fries, delivering low proportions of trans and saturated fatty acids.Practical applications: The combination of volatile compound analysis by headspace‐GC/MS techniques with multivariate statistical methods is a sensitive tool to detect quality changes in deep‐frying oils at an early stage of lipid deterioration. Evolved volatile marker compounds, e.g., E,E‐2,4‐heptadienal and heptanal correlated reasonably with quality parameters for the assessment of the thermal stability of frying oils, e.g., content of TPM polymerized trigylcerides. Comprehensive scientific sensory evaluations of frying oils revealed high‐oleic edible oils as promising frying oil alternatives for the processing of French fries providing low proportions of trans fatty acids and saturated fatty acids.
Structural Characterization of the Core Oligosaccharide Isolated from the Lipo­polysaccharide of the Psychrophilic Bacterium Colwellia psychrerythraea Strain 34H
Authors: Carillo Sara , Pieretti Giuseppina , Lindner Buko , Parrilli Ermenegilda , Filomena Sannino , Tutino Maria Luisa , Lanzetta Rosa , Parrilli Michelangelo , Corsaro Maria Michela 
Published: April 2013

AbstractCold‐adapted bacteria are microorganisms that thrive at very low temperatures in permanently cold environments (0–10 °C). Their ability to survive under these harsh conditions is the result of molecular evolution and adaptations, which include the structural modification of the phospholipid membrane. To give insight into the role of the membrane in the mechanisms of adaptation to low temperature, the characterization of other cell‐wall components is necessary. Among these components, the lipopolysaccharides are complex amphiphilic macromolecules embedded in the outer leaflet of the external membrane, of which they are the major constituents. The cold‐adapted Colwellia psychrerythraea 34H bacterium, living in deep sea and Arctic and Antarctic sea ice, was cultivated at 4 °C. The lipooligosaccharide (LOS) was isolated and analysed by means of chemical analysis. Then it was degraded either by mild hydrazinolysis (O‐deacylation) or hot KOH (4 M; N‐deacylation). Both products were investigated in detail by 1H and 13C NMR spectroscopy and by ESI FT‐ICR mass spectrometry. The oligosaccharide portion consists of a unique and very short species with the following general structure: α‐L‐Col‐(1→2)‐α‐D‐GalA‐(1→2)‐α‐D‐Man‐[3‐P‐D‐Gro]‐(1→5)‐α‐D‐Kdo‐4‐P‐Lipid‐A.
Synthesis of Cucurbit[6]uril Derivatives and Insights into Their Solubility in Water
Authors: Lewin Véronique , Rivollier Julie , Coudert Sylvie , Buisson David‐Alexandre , Baumann Delphine , Rousseau Bernard , Legrand François‐Xavier , Kouřilová Hana , Berthault Patrick , Dognon Jean‐Pierre , Heck Marie‐Pierre , Huber Gaspard 
Published: April 2013

AbstractFour new cucurbiturils CynCB[6] containing n (n = 1, 2, 4, 5) cyclohexyl equatorial units have been synthesized to complete the family of known Cy3CB[6] and Cy6CB[6] derivatives. A new CB[6] member bearing a propanediurea unit has also been prepared. The CB[6] derivatives show better solubility in pure water than native CB[6]. One cyclohexyl unit is sufficient to enhance the solubility in water by a factor of 170 with respect to CB[6], and Cy6CB[6] is around 30 times more soluble than Cy1CB[6]. The cyclohexane moieties, by limiting or impeding the formation of intermolecular C–H···O hydrogen bonds, may explain this increase in solubility. The effect of modification of the molecular shape on the solubility was assessed by liquid‐state NMR spectroscopy and DFT calculations.
Gly‐Gly‐His Immobilized On Monolayer Modified Back‐Side Contact Miniaturized Sensors for Complexation of Copper Ions
Authors: Wawrzyniak Urszula E. , Ciosek Patrycja , Zaborowski Michał , Liu Guozhen , Gooding J. Justin 
Published: April 2013

AbstractMiniaturized planar back‐side contact transducers (BSC) with chemically modified gold surface have been utilized as electrochemical sensors. The electrodes have been functionalized by sequential immobilization of aryl diazonium salts or alkanethiols and short peptide Gly‐Gly‐His. The applicability of gold substrates modified with aryl diazonium salts in voltammetric detection of copper(II) ions in aqueous solutions has been studied. The combination of two fundamental elements of the solid‐state electrode, i.e. back‐side contact (BSC) gold sensor and self‐assembled monolayers, allowed one to obtain reliable miniaturized copper(II) ion sensors. It can have important future applications in environmental sensing or in implantable biodevices.
Sensitive Determination of Nitrofurantoin by Flow Injection Analysis Using Carbon Nanofiber Screen Printed Electrodes
Authors: Salgado‐Figueroa P. , Jara‐Ulloa P. , Alvarez‐Lueje A. , Squella J. A. 
Published: April 2013

AbstractIn this work, a new method to quantify nitrofurantoin in aqueous media using a flow injection system connected to commercially available screen‐printed carbon nanofibers was developed. A pretreatment of the screen‐printed carbon nanofibers electrode with BrittonRobinson buffer/N,N‐dimethylformamide was applied to enhance the nitrofurantoin peak current signal in one step. The developed method was demonstrated to be sensible, reproducible, easy, and inexpensive. With a low detection limit, it is applicable to real samples. The results indicate that it is highly applicable for the detection of nitrofurantoin in several matrices. When urine samples without any pretreatment were analyzed, the method proved reproducible and sensible and had a low detection limit. The use of screen‐printed electrodes has advantages over other modified electrodes as a glassy carbon due to its versatility.
Studies on the Toxic Interaction Mechanism between 2‐Naphthylamine and Herring Sperm DNA
Authors: Lin Jingjing , Liu Yan , Liu Lingrong , Song Ling 
Published: April 2013

ABSTRACTThe toxic interaction between 2‐naphthylamine (2‐NA) and herring sperm deoxyribonucleic acid (hs‐DNA) has been thoroughly investigated by UV absorption, fluorescence, and circular dichroism (CD) spectroscopic methods. UV absorption result indicates that 2‐NA may intercalate into the stack base pairs of DNA during the toxic interaction of 2‐NA with DNA. A fluorescence quenching study shows that DNA quenches the intrinsic fluorescence of 2‐NA via a static pathway. The studies on effects of ionic strength and anionic quenching rule out electrostatic and groove bindings as the dominant binding modes. Further studies on denatured DNA fluorescence quenching and thermal melting studies confirm that the dominant binding mode of 2‐NA‐DNA is intercalative binding. A CD spectral study shows that the binding interaction of 2‐NA with DNA leads to the disorganization of the neat double‐helical structure of hs‐DNA. © 2013 Wiley Periodicals, Inc. J BiochemMol Toxicol 27:279‐285, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/jbt.21488
On the lack of InSAR observations of magmatic deformation at Central American volcanoes
Authors: Ebmeier S. K. , Biggs J. , Mather T. A. , Amelung F. 
Published: April 2013

AbstractA systematic survey of 3 years of L band interferometric synthetic aperture radar (InSAR) measurements of the Central American Volcanic Arc shows a striking lack of magmatic deformation. We make measurements at 20 of the 26 historically active volcanoes and demonstrate that none were deforming magmatically (2007–2010), although we do measure shallow subsidence associated with flow deposits and edifice loading at three volcanoes. The minimum detection rates for our survey, as estimated from the variance in time series of radar path delay, are relatively high due to strong variability of tropospheric water vapor. We compare the average detection threshold (2.4 cm/yr) to published InSAR measurements and show that the majority (~78%) of deformation events would have been measurable with the same level of noise as Central America. We calculate that if magmatic volcano deformation were spread evenly across historically active volcanoes worldwide, the probability of none of Central America's 26 volcanoes deforming would be < 1%. The lack of magmatic deformation in Central America may be indicative of differences in magma storage relative to other well‐studied continental arcs. The high proportion of basalts that ascend directly from depth relative to andesites stored in the shallow crust may limit the potential for high magnitude deformation. Magma stored in vertically elongated reservoirs and high parental melt volatile contents that result in bubble‐rich, compressible magmas at shallow depths may also reduce surface deformation. We consider the measurement and analysis of a lack of deformation at active volcanoes to be essential for realizing the potential of regional scale InSAR surveys.
Poverty and Natural Resources Degradation: Analysis of their Interactions in Lake Tana Basin, Ethiopia
Authors: Daregot Berihun , Ayalneh Bogale , Belay Kassa , Degnet Abebaw 
Published: April 2013

AbstractDeveloping a clear understanding of the links between poverty and natural resources degradation remained a vital task in the poverty reduction and sustainable resources conservation process. Accordingly, this paper explores the poverty and natural resources degradation linkages in Lake Tana Basin of Ethiopia. With the application of simultaneous order probit econometric model, this paper argues that a one‐sided argument of poverty that causes natural resources degradation is challenged, as poverty not only contributes to natural resources degradation but also natural resources degradation contributes to poverty along with other factors. Copyright © 2013 John Wiley & Sons, Ltd.
Surgical outcome of desmoid tumors: Adjuvant radiotherapy delayed the recurrence, but did not affect long‐term outcomes
Authors: Shin Seung Han , Ko Kyung Rae , Cho Samuel K. , Choi Yoon‐La , Seo Sung Wook 
Published: April 2013

AbstractBackgroundWe retrospectively reviewed the outcomes of desmoid tumor (DT) patients treated by surgical excision.MethodsAmong 155 consecutive patients, 119 patients satisfied our inclusion criteria. The mean follow‐up duration was 82 months. Age, gender, location, size, depth, resection margin, adjuvant radiotherapy, and excision history were analyzed for the outcomes.ResultsThe recurrence‐free survival (RFS) rates were 75% at 5 years and 72% at 10 years. Twenty‐seven (93.1%) out of 29 recurrences were detected within 5 years. In multivariate analysis, positive resection margin and excision history were independently associated with the RFS. In the comparison between the propensity score matched groups, adjuvant radiotherapy was not significantly associated with the RFS. The mean time interval from surgery to recurrence was 30.0 ± 28.7 months (median, 20 months; range, 4–123 months). This interval was significantly longer for patients who received adjuvant radiotherapy than for those who received surgical resection only, both in all recurrences and in recurrences in matched cases.ConclusionsSurgical excision appears to be a reliable treatment option for DTs. However, positive outcomes require a clear resection margin. Adjuvant radiotherapy may delay the recurrence of the tumor, although it seems to have no effect on the ultimate relapse rate. J. Surg. Oncol. 2013 108:28–33. © 2013 Wiley Periodicals, Inc.
Patients' experiences following local–regional recurrence of thyroid cancer: A qualitative study
Authors: Misra Shikha , Meiyappan Soumia , Heus Lineke , Freeman Jeremy , Rotstein Lorne , Brierley James D. , Tsang Richard W. , Rodin Gary , Ezzat Shereen , Goldstein David P. , Sawka Anna M. 
Published: April 2013

AbstractBackground and ObjectiveThe psychosocial impact of local–regional thyroid cancer recurrence is not known. The aim of this study was to explore thyroid cancer patients' experiences relating to diagnosis and treatment of local–regional disease recurrence.MethodsWe conducted 15 semi‐structured interviews with survivors of differentiated thyroid cancer who underwent neck reoperation for recurrent disease. Participants were recruited from the clinical practices of thyroid surgeons and endocrinologists at University Health Network and Mount Sinai Hospitals in Toronto, Ontario. Participant interviews were audio‐recorded, transcribed verbatim, and analyzed using qualitative methods. Saturation of themes was achieved.ResultsLocal–regional recurrence of thyroid cancer was associated with significant psychological distress. Confidence in healthcare providers as well as psychosocial support from family or social relations, were helpful in coping with disease recurrence. After recovery from treatment, post‐traumatic growth was reported. However, questions and worry about the risk for future recurrence lingered at follow‐up.ConclusionsLocal–regional recurrence of thyroid cancer has a significant psychosocial impact on patients, and support needs are heightened throughout the experience. Healthcare providers should strive to ensure that medical information and psychosocial needs of such patients are met, throughout the treatment experience, as well as at follow‐up. J. Surg. Oncol. 2013;108:47–51. © 2013 Wiley Periodicals, Inc.
Postoperative management in the prevention of complications after septoplasty
Authors: Quinn Jason G. , Bonaparte James P. , Kilty Shaun J. 
Published: April 2013

Objectives/HypothesisThe purpose of this article is to assess the relative rates of septal hematomas, synechiae, and septal perforations associated with methods commonly used to manage the nasal septum after septoplasty. As a secondary objective, we assessed the relative contribution of each method of septal management with respect to pain and patient discomfort.Study DesignSystematic review.MethodsA systematic literature search was performed for all relevant English randomized controlled, cohort, or case–control trials. Inclusion criteria included any study that assessed postoperative septal hematoma, perforation, or synechiae formation and reported on these outcomes regardless of method of septoplasty. Two authors independently extracted study information and analyzed all included articles for bias.ResultsA total of 279 studies were identified, with 17 meeting the inclusion criteria. The majority of the studies had a high risk of bias that prevented the performance of a meta‐analysis. Eight studies provided data on postoperative pain associated with different techniques, and quilting sutures were found to be significantly less painful than both nasal packing and septal splints.ConclusionsDue to the low level of evidence and the high bias of the studies, the results of this systematic review fail to demonstrate a clear benefit among any of the postseptoplasty treatment techniques. However, the results do demonstrate that septal sutures are associated with less postoperative pain versus the other methods of septal management in this review.
Non‐well‐founded extensions of \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$\mathbf {V}$\end{document}
Authors: Brian William R. 
Published: April 2013

AbstractThis paper describes a new and user‐friendly method for constructing models of non‐well‐founded set theory. Given a sufficiently well‐behaved system θ of non‐well‐founded set‐theoretic equations, we describe how to construct a model Mθ for \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$\mathsf {ZFC}^-$\end{document} in which θ has a non‐degenerate solution. We shall prove that this Mθ is the smallest model for \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$\mathsf {ZFC}^-$\end{document} which contains \documentclass{article}\usepackage{amssymb}\begin{document}\pagestyle{empty}$\mathbf {V}$\end{document} and has a non‐degenerate solution of θ.