bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Effectiveness of Surface Coatings on Preventing Interfacial Reaction During Ultrasonic Welding of Aluminum to Magnesium
Authors: Panteli Alexandria , Robson Joseph D. , Chen Ying-Chun , Prangnell Philip B. 
Published: August 2013

Abstract
High power ultrasonic spot welding (USW) is a solid-state joining process that is advantageous for welding difficult dissimilar material couples, like magnesium to aluminum. USW is also a useful technique for testing methods of controlling interfacial reaction in welding as the interface is not greatly displaced by the process. However, the high strain rate deformation in USW has been found to accelerate intermetallic compound (IMC) formation and a thick Al12Mg17 and Al3Mg2 reaction layer forms after relatively short welding times. In this work, we have investigated the potential of two approaches for reducing the IMC reaction rate in dissimilar Al-Mg ultrasonic welds, both involving coatings on the Mg sheet surface to (i) separate the join line from the weld interface, using a 100-μm-thick Al cold spray coating, and (ii) provide a diffusion barrier layer, using a thin manganese physical vapor deposition (PVD) coating. Both methods were found to reduce the level of reaction and increase the failure energy of the welds, but their effectiveness was limited due to issues with coating attachment and survivability during the welding cycle. The effect of the coatings on the joint’s interface microstructure, and the fracture behavior have been investigated in detail. Kinetic modeling has been used to show that the benefit of the cold spray coating can be attributed to the reaction rate reverting to that expected under static conditions. This reduces the IMC growth rate by over 50 pct because at the weld line, the high strain rate dynamic deformation in USW normally enhances diffusion through the IMC layer. In comparison, the thin PVD barrier coating was found to rapidly break up early in USW and become dispersed throughout the deformation layer reducing its effectiveness.
Optimization of Microwave‐Assisted Extraction of Tea Saponin and Its Application on Cleaning of Historic Silks
Authors: He Jun , Wu Zi‐ying , Zhang Shuo , Zhou Yang , Zhao Feng , Peng Zhi‐qin , Hu Zhi‐wen 
Published: August 2013

AbstractMicrowave‐assisted extraction (MAE) was utilized to extract tea saponin from oil‐tea camellia seed cake. The factors influencing the extraction efficiency were studied, including the effects of microwave power, irradiation duration, temperature, ratio of solvent to material and aqueous ethanol concentration. By systematic orthogonal experiments, the optimal extraction technology was determined. Compared with a conventional extraction method, MAE shows great advantages with the extraction time reduced from 6 h to 4 min, 50 % organic solvent saved and about 14 % extraction yield enhanced. Fourier transform infrared spectroscopy testing and high performance liquid chromatography analysis proved that the extracted resultants were tea saponin with similar compounds as a standard tea saponin. The extracted tea saponin was applied on the cleaning of historic silks and showed good removal effect on the stains. This work provides useful information for fully use of oil‐tea camellia seed cake and new applications of tea saponin at the protection of historic textiles.
Solutions and multiple solutions for superlinear perturbations of the periodic scalar p-Laplacian
Authors: Kyritsi Sophia Th. , O'Regan Donal , Papageorgiou Nikolaos S. 
Published: August 2013

AbstractWe consider a nonlinear periodic problem driven by the scalar p-Laplacian and with a reaction term which exhibits a (p – 1)-superlinear growth near ±∞ but need not satisfy the Ambrosetti-Rabinowitz condition. Combining critical point theory with Morse theory we prove an existence theorem. Then, using variational methods together with truncation techniques, we prove a multiplicity theorem establishing the existence of at least five non-trivial solutions, with precise sign information for all of them (two positive solutions, two negative solutions and a nodal (sign changing) solution).
On the exponential behaviour of non-autonomous difference equations
Authors: Barreira Luis , Valls Claudia 
Published: August 2013

AbstractGiven a sequence of matrices(Am)m∈ℕwhose Lyapunov exponents are limits, we show that this asymptotic behaviour is reproduced by the sequencesxm+1=Amxm+ fm(xm)for any sufficiently small perturbationsfm. We also consider the general case of exponential rates ecρmfor an arbitrary increasing sequenceρm. Our approach is based on Lyapunov's theory of regularity.
On the existence of global weak solutions to an integrable two-component Camassa–Holm shallow-water system
Authors: Guan Chunxia , Yin Zhaoyang 
Published: August 2013

AbstractIn this paper, we investigate the existence of global weak solutions to an integrable two-component Camassa–Holm shallow-water system, provided the initial datau0(x)andρ0(x)have end statesu± andρ±, respectively. By perturbing the Cauchy problem of the system around rarefaction waves of the well-known Burgers equation, we obtain a global weak solution for the system under the assumptionsu− ≤ u+andρ− ≤ ρ+.
The feeding apparatus of dyrosaurids (Crocodyliformes)
Authors: SCHWARZ-WINGS DANIELA 
Published: August 2013

AbstractReconstructed soft-tissues of the craniocervical region of dyrosaurids are analysed under functional aspects to determine their prey-catching capabilities. Jaw adductors and jaw abductors are enlarged and possess longer muscle fibres that are increased by a long retroarticular process. This muscle enlargement resulted in a more forceful and quicker contraction, effective for movement of the long rostrum. The occipital joint and the cervical ribs, the long retroarticular process and the high cervical neural spines of dyrosaurids suggest a higher dorsoventral flexibility of the craniocervical region, whereas lateromedial flexibility was reduced. The epaxial muscles of the neck and scapular muscles were enlarged, and the supraspinal ligament most likely fanned out into a nuchal ligament. Suspension of the neck and skull of dyrosaurids was achieved by the scapular muscles, dorsal neck ligaments and epaxial muscles, whereas ventral bracing was reduced. From the reconstructed specializations of the feeding apparatus, an enhanced capability for movements in the vertical plane is postulated for dyrosaurids, together with reduced lateral movements of the craniocervical region. Besides laterally directed strokes for fish-catching, behaviours such as poking in the substrate, bottom feeding, multidirectional prey-catching strokes and improvement of diving skills were options for dyrosaurids and suggest a possible expansion of their diet. The longirostrine skull limited prey size, but the dentition allowed shelly prey items. The specialization of the food-capturing system in dyrosaurids and the resulting expansion of their food spectrum is one possible explanation for their evolutionary success, including their undisturbed transition of the Cretaceous–Palaeogene boundary.
Brotherhood From a Distance: Americanization and the Internationalism of the Knights of Labor
Authors: Parfitt Steven 
Published: August 2013

AbstractThe Noble and Holy Order of the Knights of Labor was the largest American labour organization of the nineteenth century. But while scholars have charted its history in North America they have largely failed to explore the Order's history elsewhere, even though the organization also boasted members in Europe, Australasia, and Africa. This article is designed as part of a wider “transnationalization” of American labour history, and analyses the reasons that drove the Order's leaders towards their international growth. The leaders of the Knights of Labor sent organizers around the world not only because of their attachment to the idea of Universal Brotherhood, but also as a way to limit immigration to the United States. This synthesis of seemingly incompatible ideas reflected their desire to “Americanize” the rest of the world, by protecting living standards at home, raising them elsewhere to American standards, and exporting American-style republican institutions abroad.
A Critical Review of the Jurisprudence of the African Commission on the Right to Development
Authors: Kamga Serges Alain Djoyou , Fombad Charles Manga 
Published: August 2013

AbstractThis article critically examines the jurisprudence of the African Commission on Human and Peoples' Rights (the African Commission) on the right to development (RTD). Notwithstanding the controversy over the RTD, it is binding in the African human rights system and has been the focus of a number of cases that have come before the African Commission. After briefly examining the historical and theoretical framework of the RTD, the article focuses on the meaning of the right and its duty bearers at the national and international levels. After analysing several cases decided by the African Commission, the article concludes that the RTD is an important composite right that can provide scope, at both an individual and a collective level, for marginalized groups in society to assert their human rights.
ALLOSTATIC LOAD AND SOCIOECONOMIC STATUS IN POLISH ADULT MEN
Authors: LIPOWICZ ANNA , SZKLARSKA ALICJA , MALINA ROBERT M. 
Published: August 2013

SummaryThis study considers the relationship between a cumulative index of biological dysregulation (allostatic load) and several dimensions of socioeconomic status (SES) and lifestyle in adult Polish males. The extent to which lifestyle variables can explain SES variation in allostatic load was also evaluated. Participants were 3887 occupationally active men aged 25–60 years living in cities and villages in the Silesia region of Poland. The allostatic load indicator included eleven markers: % fat (adverse nutritional intake), systolic and diastolic blood pressures (cardiovascular activity), FEV1 (lung function), erythrocyte sedimentation rate (inflammatory processes), glucose and total cholesterol (cardiovascular disease risk), total plasma protein (stress-haemoconcentration), bilirubin, creatinine clearance and alkaline phosphatase activity (hepatic and renal functions). A higher level of completed education, being married and residing in an urban area were associated with lower physiological dysregulation. The association between indicators of SES and allostatic load was not eliminated or attenuated when unhealthy lifestyle variables were included in the model. Smoking status and alcohol consumption played minimal roles in explaining the association between SES and allostatic load; physical activity, however, had a generally protective effect on allostatic load.
Evidence of the three main clonalToxoplasma gondiilineages from wild mammalian carnivores in the UK
Authors: BURRELLS A. , BARTLEY P. M. , ZIMMER I. A. , ROY S. , KITCHENER A. C. , MEREDITH A. , WRIGHT S. E. , INNES E. A. , KATZER F. 
Published: August 2013

SUMMARYToxoplasma gondiiis a zoonotic pathogen defined by three main clonal lineages (types I, II, III), of which type II is most common in Europe. Very few data exist on the prevalence and genotypes ofT. gondiiin the UK. Wildlife can act as sentinel species forT. gondiigenotypes present in the environment, which may subsequently be transmitted to livestock and humans. DNA was extracted from tissue samples of wild British carnivores, including 99 ferrets, 83 red foxes, 70 polecats, 65 mink, 64 badgers and 9 stoats. Parasite DNA was detected using a nested ITS1 PCR specific forT. gondii, PCR positive samples were subsequently genotyped using five PCR–RFLP markers.Toxoplasma gondiiDNA was detected within all these mammal species and prevalence varied from 6·0 to 44·4% depending on the host. PCR–RFLP genotyping identified type II as the predominant lineage, but type III and type I alleles were also identified. No atypical or mixed genotypes were identified within these animals. This study demonstrates the presence of alleles for all three clonal lineages with potential for transmission to cats and livestock. This is the first DNA-based study ofT. gondiiprevalence and genotypes across a broad range of wild British carnivores.
The place names of Zemlya Frantsa-Iosifa: Leigh Smith'sEiraexpeditions, 1880 and 1881–1882
Authors: Capelotti P.J. , Forsberg Magnus 
Published: August 2013

ABSTRACTIn the summer of 1880, the British explorer Benjamin Leigh Smith made the first reconnaissance of the western reaches of Zemlya Frantsa-Iosifa [Franz Josef Land] in the specially built polar research vesselEira. This was the first expedition to go ashore in the archipelago after its acknowledged discovery by Weyprecht and Payer in 1873. Combined with his brief reconnaissance in 1881 beforeEirasank near Cape Flora, Leigh Smith added a total of 41 place names, 37 of which are still in use, to its geographic nomenclature during his two expeditions, 1880 (39 place names) and 1881–1882 (2). The 1880 names were a post-expedition collaboration, between Leigh Smith and Clements Markham, Secretary of the Royal Geographic Society (RGS). Leigh Smith provided the names of colleagues and scientists who had either been with him in 1880 or on one of his earlier expeditions to Svalbard, or those of favoured relatives, while Markham, along with Sir George Nares as an RGS peer reviewer, added the names of particularly influential individuals in geographical circles as well as a variety of museum curators who identified natural history collections returned by the expedition. Additionally, two place names are connected to the DutchWillem Barentsexpedition of 1879.
Number dissimilarities facilitate the comprehension of relative clauses in children with (Grammatical) Specific Language Impairment
Authors: ADANI FLAVIA , FORGIARINI MATTEO , GUASTI MARIA TERESA , VAN DER LELY HEATHER K. J. 
Published: August 2013

ABSTRACTThis study investigates whether number dissimilarities on subject and object DPs facilitate the comprehension of subject- and object-extracted centre-embedded relative clauses in children with Grammatical Specific Language Impairment (G-SLI). We compared the performance of a group of English-speaking children with G-SLI (mean age: 12;11) with that of two groups of younger typically developing (TD) children, matched on grammar and receptive vocabulary, respectively. All groups were more accurate on subject-extracted relative clauses than object-extracted ones and, crucially, they all showed greater accuracy for sentences with dissimilar number features (i.e., one singular, one plural) on the head noun and the embedded DP. These findings are interpreted in the light of current psycholinguistic models of sentence comprehension in TD children and provide further insight into the linguistic nature of G-SLI.
Inclusions of ternary rings of operators and conditional expectations
Authors: SALMI PEKKA , SKALSKI ADAM 
Published: August 2013

AbstractIt is shown that if T is a ternary ring of operators (TRO), X is a nondegenerate sub-TRO of T and there exists a contractive idempotent surjective map P: T → X then P has a unique, explicitly described extension to a conditional expectation between the associated linking algebras. A version of the result for W*-TROs is also presented and some applications mentioned.
X-ray powder diffraction refinement of PbTi(1−x)FexO(3−δ) solid solution series
Authors: Ganegoda Hasitha , Kaduk James A. , Segre Carlo U. 
Published: August 2013

A series of iron-doped lead titanate PbTi(1−x)FexO(3−δ) samples in the x = 0–1 composition range was prepared using sol–gel synthesis at a calcination temperature of 700 °C. The room temperature CuKα powder diffraction data collected from x = 0, 0.005, 0.01, 0.025, 0.05, 0.075, 0.1, 0.125, 0.15, 0.175, 0.2, and 0.3 samples were analyzed using the Rietveld method. Magnetoplumbite (PbFe12O19) secondary phase formation was observed at compositions x = 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, and 1. Fe-composition dependent decrease of tetragonal distortion has been observed. According to Vegard's law, the B-site iron solubility limit in the lead titanate host was found to be approximately 10 mol% (x = 0.1). Homogeneous distribution of dopants below the solubility limit was evidenced by the linear behavior of unit-cell parameters. The absence of a cubic phase and the persistence of distorted oxygen octahedra indicated the existence of ferroelectric properties even at the x = 0.3 composition. Beyond x = 0.3, the P4mm tetragonal model was determined to be invalid possibly because of oxygen defect driven structural changes, mainly tilting Fe-polyhedra.
Campylobacterinfection associated with consumption of duck liver pâté: a retrospective cohort study in the setting of near universal exposure
Authors: YOUNG N. J. , DAY J. , MONTSHO-HAMMOND F. , VERLANDER N. Q. , IRISH C. , PANKHANIA B. , OLIVER I. 
Published: August 2013

SUMMARYA retrospective cohort study was performed following several reported cases of gastrointestinal illness after a catered event. The attack rate was 45/77 (58·4%) by clinical case definition, with four individuals confirmed to haveCampylobacter. There was near universal exposure to most foodstuffs served; consumption of duck liver pâté [relative risk (RR) 2·53, 95% confidence interval (CI) 1·05–6·10], mixed leaf salad (RR 2·91, 95% CI 1·22–6·92) and table water (RR undefined,P < 0·01) were associated with illness in univariate analysis, with only the latter associated in the final multivariable model (P < 0·001). Samples of cooked duck liver pâté subsequently prepared using identical methods at the venue were contaminated withCampylobacter jejuniandC. coli; water sampling was negative. Making inferences about causation in the presence of near universal exposures in this study required consideration of the limitations of statistical analysis, with the most compelling evidence of the causal role of inadequately prepared duck liver pâté provided by environmental investigation.
Learners’ email with native speakers beyond the class: a follow-up to a classroom email project
Authors: Takahama Junko , Pasfield-Neofitou Sarah 
Published: August 2013

AbstractAlthough the linguistic and sociocultural benefits of class-based email projects are widely acknowledged, there has been little investigation of what occurs after a curriculum activity finishes. In particular, what factors promote continued communication or cause communication breakdown have received less empirical attention. This paper explores factors which promote the continuation or non-continuation of email interactions between Australian and Japanese students after the conclusion of their coursework email exchange task via the analysis of two class surveys, in addition to collected email interaction and interviews with four key students (two continuers and two non-continuers) who serve as case studies. The experiences of these four students who were randomly assigned partners in the project are contrasted with those of a fifth student, Lucas, who chose to communicate with a long-term Japanese friend for the assessment, instead of being paired by the teacher. A number of factors which influence continuation are identified, including past sojourn experience, existing social networks, perceptions towards the curriculum task and their partners, shared topics of interest, time constraints, explicit statement of desire to continue, and potentially face-threatening behaviour, and several recommendations for enhancing online exchanges are given.
A DUALIZING OBJECT APPROACH TO NONCOMMUTATIVE STONE DUALITY
Authors: KUDRYAVTSEVA GANNA 
Published: August 2013

AbstractThe aim of the present paper is to extend the dualizing object approach to Stone duality to the noncommutative setting of skew Boolean algebras. This continues the study of noncommutative generalizations of different forms of Stone duality initiated in recent papers by Bauer and Cvetko-Vah, Lawson, Lawson and Lenz, Resende, and also the current author. In this paper we construct a series of dual adjunctions between the categories of left-handed skew Boolean algebras and Boolean spaces, the unital versions of which are induced by dualizing objects $\{ 0, 1, \ldots , n+ 1\} $, $n\geq 0$. We describe the categories of Eilenberg-Moore algebras of the monads of the adjunctions and construct easily understood noncommutative reflections of left-handed skew Boolean algebras, where the latter can be faithfully embedded (if $n\geq 1$) in a canonical way. As an application, we answer the question that arose in a recent paper by Leech and Spinks to describe the left adjoint to their ‘twisted product’ functor $\omega $.
A human rights approach to health care in conflict
Authors: Footer Katherine H. A. , Rubenstein Leonard S. 
Published: August 2013

AbstractAttacks on and interference with health care services, providers, facilities, transports, and patients in situations of armed conflict, civil disturbance, and state repression pose enormous challenges to health care delivery in circumstances where it is most needed. In times of armed conflict, international humanitarian law (IHL) provides robust protection to health care services, but it also contains gaps. Moreover, IHL does not cover situations where an armed conflict does not exist. This paper focuses on the importance of a human rights approach to addressing these challenges, relying on the highest attainable standard of health as well as to civil and political rights. In particular we take the Committee on Economic, Social and Cultural Rights General Comment No. 14 (on Article 12 of the International Covenant on Economic, Social and Cultural Rights) as a normative framework from which states' obligations to respect, protect and fulfil the right to health across all conflict settings can be further developed.
Two mixed-NH3/amine platinum (II) anticancer complexes featuring a dichloroacetate moiety in the leaving group
Authors: Liu Weiping , Su Jia , Jiang Jing , Li Xingyao , Ye Qingsong , Zhou Hongyu , Chen Jialin , Li Yan 
Published: August 2013

AbstractTwo mixed-NH3/amine platinum (II) complexes of 3-dichoroacetoxylcyclobutane-1, 1-dicarboxylate have been prepared in the present study and characterized by elemental analysis and IR, HPLC-MS and 1H, 13C-NMR. The complexes exist in equilibrium between two position isomeric forms and undergo hydrolysis reaction in aqueous solution, releasing the platinum pharmacophores and dichloroacetate which is a small-molecular cell apoptosis inducer. Both complexes were evaluated for in vitro cytotoxic profile in A549, SGC-7901 and SK-OV-3 caner cells as well as in BEAS-2B normal cells. They exhibit markedly cytoxicity toward cancer cells by selectively inducing the apoptosis of cancer cells, whereas leaving normal cells less affected. They have also the ability to overcome the resistance of SK-OV-3 cancer cells to cisplatin. Our findings offer an alternative novel way to develop platinum drugs which can both overcome the drug resistance and selectively target tumor cells.