bluuebunny/crossref_metadata_2025_split huggingface dataset:
Recursive maximum likelihood estimation of time‐varying carrier frequency offset for orthogonal frequency‐division multiplexing systems
Authors: Dong Xihua , Li Xiaochen , Wu Dapeng 
Published: June 2011

ABSTRACTA recursive maximum likelihood carrier frequency offset (CFO) estimator is proposed in this work, where redundancy information contained in the cyclic prefix of multiple consecutive orthogonal frequency‐division multiplexing (OFDM) symbols is exploited in an efficient recursive fashion. Because the estimator is based on multiple OFDM symbols, the time‐varying CFO must be considered. We investigate the effect of time‐varying CFO on the performance of the estimator and the trade‐off between fast tracking ability and low estimation variance. We show that, without channel noise, the mean squared error (MSE) of estimation due to CFO estimation variation increases approximately quadratically with n, where n is the number of OFDM symbols used for CFO estimation (estimation window size), whereas the MSE due to channel noise decreases proportionally to 1/n (approximately) if the CFO is constant. A closed‐form expression of the optimal estimation window size (approximately) is derived by minimizing the MSE caused by both time‐varying CFO and channel noise. For wireless systems with time‐varying rate of change for CFO, the proposed estimator can be implemented adaptively. In addition, typical optimal estimation window sizes for WiMAX, DVB‐SH and MediaFLO systems are evaluated as an example. Copyright © 2011 John Wiley & Sons, Ltd.
Swedenborgite‐Type Cobaltites and Ferrites: Tetrahedral Frameworks with Exceptional Magnetic Properties
Authors: Raveau Bernard , Pralong Valérie , Caignaert Vincent , Maignan Antoine 
Published: June 2011

AbstractSwedenborgite‐type cobaltites and ferrites and derivatives, represent a very important class of oxides, LnBaM4O7 and CaBaM4O7 (M = Co, Fe). They are one of the rare families of mixed valent transition metal oxides, where the transition element exhibits exclusively the tetrahedral coordination. Their complex crystal chemistry, involving closely related structures with various symmetries (orthorhombic, hexagonal cubic) and possibility of oxygen “hyperstoichiometry”, leading to LnBaM4O7+δ oxides is described herein, as well as their ability to exhibit structural transitions vs. temperature. It is also shown that the triangular geometry of these new strongly electron correlated systems, plays an important role in their physics, particularly in the competition that appears between the 1D magnetic ordering and the 2D magnetic frustration. The generation of new magnetodielectric properties for CaBaCo4O7 is also emphasized.
The First Examples of Selenidogermanate Salts with Lanthanide Complex Counter Cations: Solvothermal Syntheses and Characterizations of [{Ln(en)3}2(μ‐OH)2]Ge2Se6 (Ln = Eu, Ho) and [{Ho(dien)2}2(μ‐OH)2]Ge2Se6
Authors: Tang Weiwei , Liang Jingjing , Jiang Wenqing , Wu Bing , Zhang Yong , Jia Dingxian 
Published: June 2011

AbstractThe lanthanide selenidogermanates [{Eu(en)3}2(μ‐OH)2]Ge2Se6 (1), [{Ho(en)3}2(μ‐OH)2]Ge2Se6 (2), and [{Ho(dien)2}2(μ‐OH)2]Ge2Se6 (3) (en = ethylenediamine, dien = diethylenetriamine) were solvothermally prepared by the reactions of Eu2O3 (or Ho2O3), germanium, and selenium in en and dien solvents respectively. Compounds 1–3 are composed of selenidogermanate [Ge2Se6]4– anion and dinuclear lanthanide complex cation [{Ln(en)3}2(μ‐OH)2]4+ (Ln = Eu, Ho) or [{Ho(dien)2}2(μ‐OH)2]4+. The [Ge2Se6]4– anion is composed of two GeSe4 tetrahedra sharing a common edge. The dinuclear lanthanide complex cations are built up from two [Ln(en)3]3+ or [Ho(dien)2]3+ ions joined by two μ‐OH bridges. All lanthanide(III) ions are in eight‐coordinate environments forming distorted bicapped trigonal prisms. In 1–3, three‐dimensional supramolecular networks of the anions and cations are formed by N–H···Se and N–H···O hydrogen bonds. To the best of our knowledge, 1–3 are the first examples of selenidogermanate salts with lanthanide complex counter cations.
Synthesis and Characterization of the Mixed‐Linker Copper(II) Coordination Polymer [Cu(HO3PC6H4SO3)(C10N2H8)]·H2O
Authors: Maniam Palanikumar , Stock Norbert 
Published: June 2011

AbstractA new copper(II) phosphonatobenzenesulfonate incorporating 4,4′‐bipyridine (4,4′‐bipy) as auxiliary ligand has been discovered through systematic high‐throughput (HT) screening of the system Cu(NO3)2·3H2O/H2O3PC6H4SO3H/4,4′‐bipy using different solvents. The hydrothermal synthesis of [Cu(HO3PC6H4SO3)(C10H8N2)]·H2O (1) was further optimized by screening various copper(II) salts. The crystal structure of 1 was determined by single‐crystal X‐ray diffraction and unveiled the presence of isolated sixfold coordinated Jahn–Teller‐distorted Cu2+ ions. The isolated CuN2O4 octahedra are interconnected by phosphonate and sulfonate groups to form chains along the c‐axis. The organic groups, namely phenyl rings and 4,4′‐bipy molecules cross‐link the chains into a three‐dimensional framework. Water molecules are found in the narrow voids in the structure which are held by weak hydrogen bonds. Upon dehydration, the structure of 1 undergoes a phase transition, which was confirmed by TG measurements and temperature dependent X‐ray powder diffraction. The new structure of 1‐h was refined with Rietveld methods. Detailed inspection of the structure revealed the directional switching of the Jahn–Teller distortion upon de/rehydration. Weak ferro‐/ferrimagnetic interactions were observed by magnetic investigations of 1, which switch to antiferromagnetic below 3.5 K. Compounds 1 and 1‐h are further characterized by thermogravimetric and elemental analysis as well as IR spectroscopy.
Fuel Properties of Biodiesel/Ultra‐Low Sulfur Diesel (ULSD) Blends
Authors: Dunn Robert O. 
Published: June 2011

AbstractBiodiesel is an alternative fuel and fuel extender easily derived from vegetable oil or animal fat. In 2006, the US Environmental Protection Agency mandated that maximum sulfur content of diesel fuels be reduced to 15 ppm to protect catalysts employed in exhaust after‐treatment devices. Processing to produce this ultra‐low sulfur petrodiesel (ULSD) alters fuel lubricity, density, cold flow, viscosity, and other properties. Consequently, there is a need to develop a better understanding of the basic fuel properties of biodiesel/ULSD blends. This work evaluates the effects of biodiesel volumetric blend ratio (VBD) on cloud point (CP), kinematic viscosity (ν), specific gravity (SG), and refractive index (RI) of blends with petrodiesel. Properties measured for various blends of methyl esters of soybean oil (SME) and used cooking oil (UCOME) in ULSD were compared with those for blends with low sulfur (≤500 ppm) petrodiesel fuel (LSD). With respect to increasing VBD, CP and SG increased and RI decreased with each parameter demonstrating a linear correlation. In contrast, ν showed a curvilinear relationship with respect to increasing VBD. Calibration curves were derived from regression analyses to determine VBD in biodiesel/ULSD blends from measurements of each individual property. While the models had generally high coefficients of regression (R2 > 0.986), SG models were most accurate for predicting VBD to within 1.3 vol%.
Spinal neuroplasticity in chronic pain
Authors: Zeilhofer H.U. 
Published: June 2011

Abstract
Neuroplastic changes play an important role in the generation and maintenance of chronic pain syndromes. Such changes occur at all levels of the neuraxis, from the peripheral terminals of primary sensory neurons to the cerebral cortex. Changes observed in the spinal dorsal horn in particular provide a mechanistic basis for many of the characteristics of chronic pain syndromes. While facilitated synaptic transmission between nociceptive fibers and spinal projection neurons contributes to enhanced perception of noxious stim­uli (hyperalgesia), diminished function of GA­BA-ergic and glycinergic interneurons not only induces hyperalgesia, but also triggers no­ciceptive reactions on exposure to innocuous stimuli and spontaneous pain behavior in the absence of any sensory stimulation. Spinal disinhibition thus recapitulates typical symptoms of chronic pathological pain syndromes. Studies performed by various groups over the last 10 years demonstrate that such spinal disinhibition occurs naturally in response to peripheral inflammation and nerve dam­age. The present article summarizes current status of this research.
ENUMERATING SUPER EDGE-MAGIC LABELINGS FOR THE UNION OF NONISOMORPHIC GRAPHS
Authors: AHMAD A. , LÓPEZ S. C. , MUNTANER-BATLE F. A. , RIUS-FONT M. 
Published: June 2011

AbstractA super edge-magic labeling of a graphG=(V,E) of orderpand sizeqis a bijectionf:V∪E→{i}p+qi=1such that: (1)f(u)+f(uv)+f(v)=k for all uv∈E; and (2)f(V)={i}pi=1. Furthermore, whenGis a linear forest, the super edge-magic labeling ofGis calledstrongif it has the extra property that ifuv∈E(G) ,u′,v′∈V(G) anddG(u,u′)=dG(v,v′)<+∞, thenf(u)+f(v)=f(u′)+f(v′). In this paper we introduce the concept of strong super edge-magic labeling of a graphGwith respect to a linear forestF, and we study the super edge-magicness of an odd union of nonnecessarily isomorphic acyclic graphs. Furthermore, we find exponential lower bounds for the number of super edge-magic labelings of these unions. The case whenGis not acyclic will be also considered.
Location of geodesics and isoperimetric inequalities in Denjoy domains
Authors: Rodríguez José M. , Sigarreta José M. 
Published: June 2011

AbstractWe find approximate solutions (chord–arc curves) for the system of equations of geodesics in Ω∩ℍ for every Denjoy domain Ω, with respect to both the Poincaré and the quasi-hyperbolic metrics. We also prove that these chord–arc curves are uniformly close to the geodesics. As an application of these results, we obtain good estimates for the lengths of simple closed geodesics in any Denjoy domain, and we improve the characterization in a 1999 work by Alvarez et al. on Denjoy domains satisfying the linear isoperimetric inequality.
The clinical effectiveness of CBT-based guided self-help interventions for anxiety and depressive disorders: a systematic review
Authors: Coull G. , Morris P. G. 
Published: June 2011

BackgroundCognitive-behavioural therapy (CBT)-based guided self-help (GSH) has been suggested to be an effective intervention for mild to moderate anxiety and depression, yet the evidence seems inconclusive, with some studies reporting that GSH is effective and others finding that GSH is ineffective. GSH differs in important respects from other levels of self-help, yet the literature regarding exclusively guided self-help interventions for anxiety and depression has not been reviewed systematically.MethodA literature search for randomized controlled trials (RCTs) examining CBT-based GSH interventions for anxiety and depressive disorders was conducted. Multiple electronic databases were searched; several journals spanning key disciplines were hand-searched; reference lists of included review articles were scanned and relevant first authors were contacted.ResultsThirteen studies met the inclusion criteria. Meta-analysis indicated the effectiveness of GSH at post-treatment, although GSH was found to have limited effectiveness at follow-up or among more clinically representative samples. Studies that reported greater effectiveness of GSH tended to be of lower methodological quality and generally involved participants who were self-selected rather than recruited through clinical referrals.ConclusionsAlthough there is support for the effectiveness of CBT-based GSH among media-recruited individuals, the finding that the reviewed RCTs had limited effectiveness within routine clinical practice demonstrates that the evidence is not conclusive. Further rigorous evidence based on clinical populations that examines longer-term outcomes is required before CBT-based GSH interventions can be deemed effective for adults accessing primary care services for treatment of anxiety and depression.
Combating In-Work Poverty in Continental Europe: An Investigation Using the Belgian Case
Authors: MARX IVE , VANHILLE JOSEFINE , VERBIST GERLINDE 
Published: June 2011

AbstractRecent studies find in-work poverty to be a pan-European phenomenon. Yet in-work poverty has come to the fore as a policy issue only recently in most continental European countries. Policies implemented in the United States and the United Kingdom, most notably in-work benefit schemes, are much discussed. This article argues that if it comes to preventing and alleviating poverty among workers, both the policy options and constraints facing Continental European policymakers are fundamentally different from those facing Anglo-Saxon policymakers. Consequently, policies that work in one setting cannot be simply emulated elsewhere. We present microsimulation derived results for Belgium to illustrate some of these points. Policy options discussed and simulated include: higher minimum wages, reductions in employee social security contributions, tax relief for low-paid workers and the implementation of a stylised version of the British Working Tax Credit. The latter measure has the strongest impact on in-work poverty, but in settings where wages are compressed, as in Belgium, a severe trade-off between coverage and budgetary cost presents itself. The article concludes that looking beyond targeted measures to universal benefits and support for employment of carers may be important components of an overall policy package to tackle in-work poverty.
Contemporary perspectives on luxury building in second-century BC Rome
Authors: Nichols Marden 
Published: June 2011

Sommarii:Questo studio letterario contribuisce a sviluppare un aspetto sottovalutato della storia culturale di Roma, raccogliendo l'evidenza testuale contemporanea riguardo le attitudini all'investimento nell'architettura privata nel II secolo a.C. Scarso materiale archeologico soprawive a documentare le case di questo periodo, ma una stretta attenzione ai testi esistenti rivela un alto livello di sofisticazione nelle valutazioni morali ascritte alia costruzione e decorazioni domestiche. La mia analisi inizia con una ricognizione dei frammenti più importanti delle orazioni di Catone il Vecchio, e in seguito si concentra quasi esclusivamente sullaMostellariadi Plauto. Alcuni passaggi di questi lavori contraddicono l'immagine che autori romani più tardi forniscono dei Romani di epoca medio-repubblicana come disinteressati a case costose o elaborate e non corrotti da un desiderio per il lusso. All'inizio del II secolo a.C, le stravaganze architettoniche erano già entrate nel canone del vizio. Per di più, laMostellariadi Plauto fornisce una chiave di lettura delle differenze percepite tra altri lussi ritenuti più probabilmente da disprezzare nel valore o da essere consumati, e i vizi di costruire ciò che poteva essere considerato un investimento.
Substructio et tabularium
Authors: Coarelli Filippo 
Published: June 2011

Sommarii:L'edificio sul Campidoglio conosciuto attualmente come tabularium è uno dei pochi monumenti esistenti della Roma repubblicana ancora ben conservati e studiati relativamente bene. Ciononostante la sua funzione non è ancora chiara. Lo stesso nome ‘Tabularium’ è stato sottoposto a discussione in molte occasioni e quasi certamente è sbagliato. Vengono valutati i recenti srudi di Nicholas Purcell, Henner von Hesberg e Pier Luigi Tucci. Avendo esaminato in dettaglio l'evidenza storica e archeologica, l'autore propone che questo complesso capitolino sia la base (substructio) di un triplice tempio dedicate a Venus Victrix (il più importante situate al centro), al Genius publicus populi Romani e a Fausta Felicitas. Supporto per questa interpretazione va cercato nei fasti fratrum Arvalium del 9 ottobre. Esso rappresenta una chiara testimonianza del potere e della ideologia di Silla, che dominavano gli spazi delle politiche tradizionali con immensa forza.
The vernae Caprenses: traces of Capri's Imperial history after Tiberius
Authors: Booms Dirk 
Published: June 2011

Sommarii:Nonostante le visite di Tiberio a Capri siano state documentate estensivamente dagli autori antichi, e molti siti romani siano ancora visitabili sull'isola, la sua storia imperiale dopo Tiberio rimane largamente sconosciuta. Molta attenzione è stata riservata alle dodici ville che si suppone siano state costruite dall'imperatore, delle quali solo una manciata è stata identificata con sicurezza; ma nessuna fase principale di costruzione è stata attribuita ad un periodo più tardo della tradizionale fase augusteatiberiana. Allo stesso modo, nessun'altra visita da parte di altri imperatori è stata ricordata dalle fonti letterarie, nonostante l'esilio della moglie di Commodo e della sorella dall'imperatore stesso indichi almeno che l'isola rimase un possesso imperiale. Inoltre essa continuò ad essere associata esclusivamente a Tiberio dagli studiosi antichi fino al V secolo d.C. Per dare un senso ai dati frammentari pertinenti al destino di Capri dopo la morte di Tiberio, questo articolo considera le fonti epigrafiche riguardanti l'attivita imperiale sull'isola. L'esistenza di un'unica informazione su un gruppo di schiavi imperiali che una volta servivano sull'isola offrono una prospettiva su un evento eccezionale nell'organizzazione della casa imperiale, probabilmente da datarsi alla prima parte del regno di Claudio, che influenzò l'ulteriore storia imperiale dell'isola.
Pirro Ligorio and twocolumna caelatadrawings at Windsor Castle
Authors: Campbell Ian , Gaston Robert W. 
Published: June 2011

Sommarii:L'articolo mette insieme le evidenze grafiche e testuali di Pirro Ligorio e altri su un esempio straordinario di unacolumna caelataromana. Esso stabilisce senza ombra di dubbio che la colonna esisteva e che fu scavata dal fondo marino vicino aMisenumda Ludovico Montalto intorno al 1520. La colonna fu portata a Napoli ma langui sulla riva o sulla banchina al Castello dell'Ovo probabilmente fino alia metà del XVI secolo, da quando fu pesantemente esposta alle intemperie, dopo di che nulla si è più saputo di essa. Gli autori discutono le possibilità che la colonna possa essere stata parte di un arco di trionfo o di una colonna, o votiva o onorifica, non incassata, del tipo visto sul famoso paesaggio portuale diStabiae, che verosimilmente rappresentaMisenum.
Analysis, simulation, and implementation of a human-inspired pole climbing robot
Authors: Sadeghi A. , Moradi H. , Ahmadabadi M. Nili 
Published: June 2011

SUMMARYIn this paper, we present the design, static analysis, simulation, and implementation of a novel design for a naturally stable climbing robot that has been inspired from human pole/tree climbers. The other benefits of this robot, besides being naturally stable, are its simple design, ease of control, light weight, simple mechanism, and fast climbing speed. The robot consists of three wheels, two free and one active wheel, which enable the robot to climb or descend poles. The free wheels are almost frictionless, while the active wheel has enough friction to be able to apply force on the pole for stable climbing or descending. The wheels are designed in V-shape such that the robot can compensate for misplacements eliminating possible detachment from poles. Although the robot can operate with a single free wheel, however, an extra free wheel is added to increase the stability and safety of the robot. In this paper, the static analysis of the robot is presented and the robot is simulated. Furthermore, the robot is actually implemented and successfully tested in two sizes, a small size and a big/full size. The full-scale prototype has been equipped with washing and inspection tools and tested washing actual street lights. The results show the unique characteristics of this robot that make it more stable if more weight is carried.
Prevalence and risk factors for hepatitis C virus infection in Kech District, Balochistan, Pakistan: most infections remain unexplained. A cross-sectional study
Authors: AHMED F. , IRVING W. L. , ANWAR M. , MYLES P. , NEAL K. R. 
Published: June 2011

SUMMARYWe studied a cross-sectional sample of the population of Kech, a small rural town in Pakistan to determine the prevalence and risk factors for hepatitis C infection. The prevalence of hepatitis C was 110 out of 2000 persons (5·5%, 95% confidence interval 4·5–6·5). Higher rates were identified in males. Independent risk factors identified were age ⩾75 years, being a healthcare worker, and injecting drug use. There was a high prevalence of many potential routes of transmission of bloodborne viruses and most people reported at least one potential risk factor.
Recommendations from the Association for European Paediatric Cardiology for training in paediatric cardiac intensive care
Authors: da Cruz Eduardo , Lechner Evelyn , Stiller Brigitte , Munoz Ricardo , Beghetti Maurice , Fakler Ulrich , Haas Nikolaus 
Published: June 2011

AbstractThe following document provides a summary of the guidelines and recommendations for paediatric cardiac intensive care training as a requirement for recognition as a European paediatric cardiologist. It is therefore primarily targeting paediatric cardiology trainees in Europe, including those doctors who might wish to become experts in cardiac intensive care. These recommendations represent a frame for consistency, will evolve, and may be adapted to specific institutional requirements. They will be complemented by a learning module to be provided by our Association in the near future.
SYMPLECTIC STRUCTURES ON STATISTICAL MANIFOLDS
Authors: NODA TOMONORI 
Published: June 2011

AbstractA relationship between symplectic geometry and information geometry is studied. The square of a dually flat space admits a natural symplectic structure that is the pullback of the canonical symplectic structure on the cotangent bundle of the dually flat space via the canonical divergence. With respect to the symplectic structure, there exists a moment map whose image is the dually flat space. As an example, we obtain a duality relation between the Fubini–Study metric on a projective space and the Fisher metric on a statistical model on a finite set. Conversely, a dually flat space admitting a symplectic structure is locally symplectically isomorphic to the cotangent bundle with the canonical symplectic structure of some dually flat space. We also discuss nonparametric cases.
A review of hemorrhagic septicemia in cattle and buffalo
Authors: Shivachandra S. B. , Viswas K. N. , Kumar A. A. 
Published: June 2011

AbstractHemorrhagic septicemia (HS), an acute, fatal and septicemic disease of cattle and buffaloes caused byPasteurella multocida, is important in tropical regions of the world, especially in African and Asian countries. The prevalence of disease has been well documented with predominant isolation ofP. multocidaserotypes B:2 and E:2. Conventional methods of identification such as serotyping, biotyping, antibiogram determination and pathogenicity as well as molecular methods (P. multocida-specific polymerase chain reaction (PCR), a serogroup B-specific PCR assay, multiplex capsular typing system and loop-mediated isothermal amplification techniques) and characterization (restriction endonuclease analysis, randomly amplified polymorphic DNA analysis, repetitive extragenic palidromic PCR and enterobacterial repetitive intergenic consensus PCR analysis) are applied in parallel for rapid epidemiological investigations of HS outbreaks. Although several vaccine formulations including alum precipitated, oil adjuvant and multiple emulsion vaccines are commercially available, the quest for suitable broadly protective HS vaccines with long-lasting immunity is on the upsurge. Concurrently, attempts are being made to unravel the mysteries of the pathogen and its virulence factors, pathogenesis and determinants of protective immunity as well as diversity among strains ofP. multocida.This review highlights the advances in these various aspects of HS.