bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dynamical separation of spherical bodies in supersonic flow
Authors: Laurence S. J. , Parziale N. J. , Deiterding R. 
Published: October 2012

AbstractAn experimental and computational investigation of the unsteady separation behaviour of two spheres in Mach-4 flow is carried out. The spherical bodies, initially contiguous, are released with negligible relative velocity and thereafter fly freely according to the aerodynamic forces experienced. In experiments performed in a supersonic Ludwieg tube, nylon spheres are initially suspended in the test section by weak threads which are detached by the arrival of the flow. The subsequent sphere motions and unsteady flow structures are recorded using high-speed (13 kHz) focused shadowgraphy. The qualitative separation behaviour and the final lateral velocity of the smaller sphere are found to vary strongly with both the radius ratio and the initial alignment angle of the two spheres. More disparate radii and initial configurations in which the smaller sphere centre lies downstream of the larger sphere centre each increases the tendency for the smaller sphere to be entrained within the flow region bounded by the bow shock of the larger body, rather than expelled from this region. At a critical angle for a given radius ratio (or a critical radius ratio for a given angle), transition from entrainment to expulsion occurs; at this critical value, the final lateral velocity is close to maximum due to the same ‘surfing’ effect noted by Laurence & Deiterding (J. Fluid Mech., vol. 676, 2011, pp. 396–431) at hypersonic Mach numbers. A visualization-based tracking algorithm is used to provide quantitative comparisons between the experiments and high-resolution inviscid numerical simulations, with generally favourable agreement.
On the transition pattern of the oblique detonation structure
Authors: Teng Hong Hui , Jiang Zong Lin 
Published: October 2012

AbstractOblique detonation waves are simulated to study the evolution of their morphology as gasdynamic and chemical parameters are varied. Although two kinds of transition pattern have previously been observed, specifically an abrupt transition and a smooth one, the determining factors for the transition pattern are still unclear. Numerical results show that the transition pattern is influenced by the inflow Mach number, chemical activation energy and heat release. Despite the fact that these parameters were known to influence the detonation instability, the transition pattern variation cannot be predicted according to the instability criterion. In this study, the difference in the oblique shock and detonation angles is proposed as the criterion to determine the transition pattern with the aid of shock-polar analysis. It is found that the smooth transition will appear when the angle difference is small, while the abrupt transition will occur when the difference is large. The shift from the smooth transition to the abrupt transition occurs when the angle difference is about $1{5}^{\ensuremath{\circ} } $–$1{8}^{\ensuremath{\circ} } $. The previously proposed criterion using the characteristic time ratio is also examined and compared with the present angle difference criterion, and the latter is proved to provide better results.
AN EVALUATION OF MOROCCO'S CLAIMS TO SPAIN'S REMAINING TERRITORIES IN AFRICA
Authors: Trinidad Jamie 
Published: October 2012

AbstractCeuta, Melilla, Vélez de la Gomera, Alhucemas and the Chafarinas Islands are Spanish territories that lie along Morocco's northern coastline. Morocco has claimed the territories since its independence in 1956. The sovereignty of a further territory, the islet of Perejil, remains unresolved after a military confrontation between Morocco and Spain in 2002. The author examines the arguments in the ongoing sovereignty dispute. Morocco's claim to Ceuta and Melilla is found to be weak. However, its claim to the remaining territories may be supported by the analogous case of São João Baptista de Ajudá, an unpopulated Portuguese fortress territory in Dahomey (Benin) that was singled out for ‘statutory decolonization’ by the UN.
BETWEEN SPLENDID ISOLATION AND TENTATIVE IMPERIALISM: THE EU'S EXTENSION OF ITS EMISSION TRADING SCHEME TO INTERNATIONAL AVIATION AND THE ECJ'S JUDGMENT IN THE ATA CASE
Authors: Gattini Andrea 
Published: October 2012

For the last 15 years the European Union (EU) has been particularly active, both internally and internationally, in the fight against global warming, and it is determined to continue to play a global leadership role in this strategic issue. Among the various market-based measures decided upon, the Emission Trading Scheme (ETS) for energy-intensive industrial sectors has been rightly described as the ‘flagship of the EU climate policy’.1Even before proceeding to a general overhauling of Directive 2003/87 in the framework of the 2009 Climate and Energy package, the EU had decided to modify the Directive by including aviation activities in the ETS. Directive 2008/1012provides that all flights from whichever aircraft operator taking off from or landing in the EU territory will be subjected to the ETS from 1 January 2012. For the year 2012 97 per cent of all emissions allowances will be freely assigned, from 2013 the amount will decrease to 95 per cent, whereas 15 per cent of all allowances will be auctioned. In reality the percentage of free allowances is much lower, about 60 per cent, because it takes as parameter the historical aviation emissions of the years 2004–06, when the air traffic was 40 per cent lower than it is now. The idea underlying the Directive is that aircraft operators will either purchase the necessary allowances in the market or will try to reduce their emissions by using bio-fuels (or else reducing the number of flights), with the second option becoming more economically attractive over time.
FROM ADMINISTRATIVE LAW TO ADMINISTRATIVE LEGITIMATION? TRANSNATIONAL ADMINISTRATIVE LAW AND THE PROCESS OF EUROPEAN INTEGRATION
Authors: Kuo Ming-Sung 
Published: October 2012

AbstractGlobalization redefines the relationship between law and space, resulting in the emergence of transnational administrative law in a globalizing legal space. I aim to shed light on transnational administrative law by examining how administrative law relates to the process of European integration. I argue that the idea of administrative legitimation is at the core of this relationship. In the European Union, transnational administration grounds its legitimacy on the fulfilment of administrative law requirements. However, given that in the European Union, administrative legitimation is rooted in Europe's constitutional transformation, I caution against the projection of Europe's experience onto global governance.
PROPERTY AND THE DEFINITION OF SLAVERY
Authors: Allain Jean , Hickey Robin 
Published: October 2012

AbstractCurrently there is no clear understanding of the meaning of ‘slavery’ in modern international law. While generally it is accepted that the authoritative definition of slavery is provided by Article 1 of the Slavery Convention 1926, in recent times slavery has been understood in such a wide variety of ways that effectively it is a meaningless term. This paper reflects on this interpretation problem and aims to redress this balance by reclaiming the core meaning of the legal definition. It applies property law perspectives to explain the conception of ownership invoked by Article 1, to argue that it remains relevant and to explore how it might be applied in identifying modern cases of slavery.
A QUESTION MODULE FOR ASSESSING COMMUNITY STIGMA TOWARDS HIV IN RURAL INDIA
Authors: VLASSOFF CAROL , WEISS MITCHELL G. , RAO SHOBHA 
Published: October 2012

SummaryThis paper describes a simple question module to assess community stigma in rural India. Fear of stigma is known to prevent people from seeking HIV testing and to contribute to further disease transmission, yet relatively little attention has been paid to community stigma and ways of measuring it. The module, based on a vignette of a fictional HIV-positive woman, was administered to 494 married women and 186 unmarried male and female adolescents in a village in rural Maharashtra, India. To consider the usefulness of the question module, a series of hypotheses were developed based on the correlations found in other studies between HIV-related stigma and socio-demographic characteristics (age, education, discussion of HIV with others, knowing someone living with HIV, knowledge about its transmission and whether respondents acknowledged stigmatizing attitudes as their own or attributed them to others). Many of the study's hypotheses were confirmed. Among married women, correlates of stigma included older age, lack of discussion of HIV and lack of knowledge about transmission; among adolescents, lower education and lack of discussion of HIV were the most significant correlates. The paper concludes that the question module is a useful tool for investigating the impact of interventions to reduce stigma and augment social support for people living with HIV in rural India.
Mastoid subperiosteal abscess in children: drainage or mastoidectomy?
Authors: Psarommatis I , Giannakopoulos P , Theodorou E , Voudouris C , Carabinos C , Tsakanikos M 
Published: October 2012

AbstractObjective:To evaluate the management of mastoid subperiosteal abscess using two different surgical approaches: simple mastoidectomy and abscess drainage.Method:The medical records of 34 children suffering from acute mastoiditis with subperiosteal abscess were retrospectively reviewed. In these cases, the initial surgical approach consisted of either myringotomy plus simple mastoidectomy or myringotomy plus abscess drainage.Results:Thirteen children were managed with simple mastoidectomy and 21 children were initially managed with abscess drainage. Of the second group, 12 children were cured without further treatment while 9 eventually required mastoidectomy. None of the children developed complications during hospitalisation, or long-term sequelae.Conclusion:Simple mastoidectomy remains the most effective procedure for the management of mastoid subperiosteal abscess. Drainage of the abscess represents a simple and risk-free, but not always curative, option. It can be safely used as an initial, conservative approach in association with myringotomy and sufficient antibiotic coverage, with simple mastoidectomy reserved for non-responding cases.
Comparison of techniques for identification of peripheral vestibular nystagmus
Authors: West P D B , Sheppard Z A , King E V 
Published: October 2012

AbstractObjective:To determine the best clinical method for identifying peripheral vestibular nystagmus, by comparing eye movement examination with optic fixation, and with fixation removed using Frenzel's glasses, infra-red video-Frenzel's goggles or an ophthalmoscope, with results of electronystagmography.Method:One hundred patients referred for electronystagmography from the audiovestibular medicine clinic at Queen Alexandra Hospital, Portsmouth, were examined immediately before undergoing electronystagmography.Results:Video-Frenzel's goggles were highly effective at detecting peripheral vestibular nystagmus, with a sensitivity of 85 per cent (95 per cent confidence interval, 62.1–96.8 per cent) and a specificity of 65 per cent (53.5–75.3 per cent), compared with electronystagmography. Ophthalmoscopy had comparable sensitivity to Frenzel's glasses (used in the dark), i.e. 26.3 per cent (9.1–51.2 per cent) compared with 31.6 per cent (12.6–56.6 per cent), respectively. Frenzel's glasses as normally used in ENT clinics (i.e. in dim lighting) were ineffective, with a sensitivity of just 10 per cent (1.2–31.7 per cent).Conclusion:Video-Frenzel's goggles should be used in all clinics with substantial numbers of balance-impaired patients. Traditional Frenzel's glasses have no place in clinical practice unless formal black-out facilities are available.
Cognitive impairment in euthymic major depressive disorder: a meta-analysis
Authors: Bora E. , Harrison B. J. , Yücel M. , Pantelis C. 
Published: October 2012

BackgroundThere is evidence to suggest that cognitive deficits might persist beyond the acute stages of illness in major depressive disorder (MDD). However, the findings are somewhat inconsistent across the individual studies conducted to date. Our aim was to conduct a systematic review and meta-analysis of existing studies that have examined cognition in euthymic MDD patients.MethodFollowing a systematic search across several publication databases, meta-analyses were conducted for 27 empirical studies that compared euthymic adult MDD patients (895 participants) and healthy controls (997 participants) across a range of cognitive domains. The influence of demographic variables and confounding factors, including age of onset and recurrent episodes, was examined.ResultsCompared with healthy controls, euthymic MDD patients were characterized by significantly poorer cognitive functions. However, the magnitude of observed deficits, with the exception of inhibitory control, were generally modest when late-onset cases were excuded. Late-onset cases demonstrated significantly more pronounced deficits in verbal memory, speed of information processing and some executive functions.ConclusionsCognitive deficits, especially poor response inhibition, are likely to be persistent features, at least of some forms, of adult-onset MDD. More studies are necessary to examine cognitive dysfunction in remitted psychotic, melancholic and bipolar spectrum MDD. Cognitive deficits overall appear to be more common among patients with late-onset depression, supporting the theories suggesting that possible vascular and neurodegenerative factors play a role in a substantial number of these patients.
The relationship of perceptions of tap water safety with intake of sugar-sweetened beverages and plain water among US adults
Authors: Onufrak Stephen J , Park Sohyun , Sharkey Joseph R , Sherry Bettylou 
Published: October 2012

AbstractObjectiveResearch is limited on whether mistrust of tap water discourages plain water intake and leads to a greater intake of sugar-sweetened beverages (SSB). The objective of the present study was to examine demographic differences in perceptions of tap water safety and determine if these perceptions are associated with intake of SSB and plain water.DesignThe study examined perceptions of tap water safety and their cross-sectional association with intake of SSB and plain water. Racial/ethnic differences in the associations of tap water perceptions with SSB and plain water intake were also examined.SettingNationally weighted data from the 2010 HealthStyles Survey (n 4184).SubjectsUS adults aged ≥18 years.ResultsOverall, 13·0 % of participants disagreed that their local tap water was safe to drink and 26·4 % of participants agreed that bottled water was safer than tap water. Both mistrust of tap water safety and favouring bottled water differed by region, age, race/ethnicity, income and education. The associations of tap water mistrust with intake of SSB and plain water were modified by race/ethnicity (P < 0·05). Non-white racial/ethnic groups who disagreed that their local tap water was safe to drink were more likely to report low intake of plain water. The odds of consuming ≥1 SSB/d among Hispanics who mistrusted their local tap water was twice that of Hispanics who did not (OR = 2·0; 95 % CI 1·2, 3·3).ConclusionsPublic health efforts to promote healthy beverages should recognize the potential impact of tap water perceptions on water and SSB intake among minority populations.
Prevalence of 25-hydroxyvitamin D deficiency in Korean adolescents: association with age, season and parental vitamin D status
Authors: Kim Shin Hye , Oh Min Kyung , Namgung Ran , Park Mi Jung 
Published: October 2012

AbstractObjectiveWe aimed to assess the prevalence and associated factors of vitamin D deficiency in healthy adolescents and to determine parent–adolescent association in vitamin D status.DesignA cross-sectional study.SettingData from the Korean National Health and Nutrition Examination Survey (KNHANES) 2008–2009. Serum 25-hydroxyvitamin D (25(OH)D) levels were measured using 125I-labelled RIA kits. Vitamin D deficiency in adolescents was defined as 25(OH)D level <27·5 nmol/l, and 25(OH)D levels between 27·5 and <50 nmol/l were considered insufficient. For the parents, vitamin D deficiency was defined as 25(OH)D level <50 nmol/l.SubjectsThe study population consisted of 2062 adolescents (1095 boys, 967 girls; aged 10–18 years) and their parents (1005 fathers, 1341 mothers).ResultsOverall, 13·4 % of adolescents (boys 11·7 %, girls 15·4 %) were 25(OH)D deficient, 54·7 % were 25(OH)D insufficient. Prevalence of vitamin D deficiency increased with age (P < 0·0001). Parental vitamin D deficiency was more prevalent in vitamin D-deficient adolescents than in non-deficient adolescents (all P < 0·0001). In multivariate logistic regression analyses, predictors for vitamin D deficiency were senior high school students (OR = 3·45–4·33), winter/spring season (OR = 3·18–5·11/5·35–7·36) and parental vitamin D deficiency (OR = 1·78–4·88; all P < 0·05).ConclusionsVitamin D insufficiency is prevalent among healthy Korean adolescents and the parent–offspring association warrants vitamin D screening for family members of deficient individuals.
Erosional history of the Prydz Bay sector of East Antarctica from detrital apatite and zircon geo‐ and thermochronology multidating
Authors: Tochilin Clare J. , Reiners Peter W. , Thomson Stuart N. , Gehrels George E. , Hemming Sidney R. , Pierce Elizabeth L. 
Published: October 2012

Approximately 98% of East Antarctica is covered by the East Antarctic Ice Sheet (EAIS), which has covered parts of the continent since the early Oligocene (34 Ma) and obscures evidence about the region's tectonic and erosional history. To better constrain the subglacial record, we analyzed geo‐ and thermochronologic dates of Oligocene‐Quaternary sediments from Prydz Bay, which drains ∼16% of the EAIS. We used multidating techniques, measuring U‐Pb, fission track, and (U‐Th)/He dates on apatite and zircon grains and40Ar/39Ar dates on hornblende grains to determine crystallization and cooling ages. Apatite and zircon U‐Pb dates and hornblende40Ar/39Ar dates are dominantly ∼500 Ma, recording Pan‐African metamorphism and magmatism. Zircon fission track dates record cooling at ∼250–300 Ma and ∼120 Ma from Permian‐Triassic (300‐201 Ma) rifting and Cretaceous (120 Ma) magmatic resetting. Mean apatite fission track dates decrease from ∼280‐210 Ma in early Oligocene samples, with lag times decreasing from ∼250‐180 My, indicating increasing erosion rates. Miocene‐Quaternary (10.7‐0 Ma) samples show a smaller range from ∼180 to ∼150 Ma. Youngest measured apatite He ages also decrease from ∼100 Ma to ∼25 Ma in Oligocene‐Miocene samples. These results indicate increasing erosion rates (<0.02 km/My to >0.2 km/My) in catchments draining to Prydz Bay in the early Oligocene, with slower erosion since the late Miocene. This erosion was likely achieved by glacial incision into pre‐existing valleys, reaching depths of ∼2.8–3.0 km by the late Miocene. This is consistent with EAIS models showing a transition to less erosive, cold‐based conditions following the mid‐Miocene climatic optimum.
Characterization of Staphylococcus aureus EssB, an integral membrane component of the Type VII secretion system: atomic resolution crystal structure of the cytoplasmic segment
Authors: Zoltner Martin , Fyfe Paul K. , Palmer Tracy , Hunter William N. 
Published: October 2012

The Type VII protein translocation/secretion system, unique to Gram-positive bacteria, is a key virulence determinant in Staphylococcus aureus. We aim to characterize the architecture of this secretion machinery and now describe the present study of S. aureus EssB, a 52 kDa bitopic membrane protein essential for secretion of the ESAT-6 (early secretory antigenic target of 6 kDa) family of proteins, the prototypic substrate of Type VII secretion. Full-length EssB was heterologously expressed in Escherichia coli, solubilized from the bacterial membrane, purified to homogeneity and shown to be dimeric. A C-terminal truncation, EssB∆C, and two soluble fragments termed EssB-N and EssB-C, predicted to occur on either side of the cytoplasmic membrane, have been successfully purified in a recombinant form, characterized and, together with the full-length protein, used in crystallization trials. EssB-N, the 25 kDa N-terminal cytoplasmic fragment, gave well-ordered crystals and we report the structure, determined by SAD (single-wavelength anomalous diffraction) targeting an SeMet (selenomethionine) derivative, refined to atomic (1.05 Å; 1 Å=0.1 nm) resolution. EssB-N is dimeric in solution, but crystallizes as a monomer and displays a fold comprised of two globular domains separated by a cleft. The structure is related to that of serine/threonine protein kinases and the present study identifies that the Type VII secretion system exploits and re-uses a stable modular entity and fold that has evolved to participate in protein–protein interactions in a similar fashion to the catalytically inert pseudokinases.
Correlation between the piezo-Barkhausen effect and the fatigue limit of steel
Authors: Erber T , Guralnick S A , Segre C U , Tong W 
Published: October 2012

Abstract
Many types of ferrous metals can sustain an indefinite number of repeated loading cycles (N ⩾ 107 cycles) provided that the maximum imposed stresses do not exceed certain critical values usually referred to as fatigue or endurance limits. In current practice, these limits are primarily inferred from statistical analyses of numerous fatigue experiments that relate the number of cycles to failure, N
f, to the loading programs. Numerous attempts have been made to bypass these time consuming tests by the direct observation of changes in material microstructures utilizing a variety of physical effects ranging from neutron diffraction, x-ray radiography, acoustic emission and even positron radiation patterns; but none of these approaches has yielded any unambiguous indices of damage. Recently, it has been found that the evolution of piezomagnetic hysteresis, due to magnetization changes induced in ferromagnetic steels by tension and compression, is a reliable indicator of the development of fatigue damage and can lead to practical predictions of service life. Further detailed information concerning processes at the microstructural level can be obtained from measurements of flux jumps associated with the piezomagnetic fields. Sequences of flux variations of the order of 10−3 Mx or 10−11 Wb, comparable to those observed in conventional Barkhausen experiments, appear when ferromagnetic steels are subjected to tension or compression. The amplitude distribution of these piezo-Barkhausen pulses increases markedly in the vicinity of the endurance limit and appears to provide a rapid means for distinguishing between stable, i.e. safe, loading regimes and those terminating in fatigue failure.
Isothermal depolarization current spectroscopy of localized states in metal oxide varistors
Authors: Tonkoshkur Yu A , Glot A B 
Published: October 2012

Abstract
A new method for the processing of time-dependent isothermal depolarization current in oxide varistors is proposed. It involves (i) a new model for kinetics of the depolarization current, which is related to the parameters of the localized states, (ii) an account of the distribution of the relaxation time (which takes place due to the structure inhomogeneity of ceramics) using the Kohlrausch–Williams–Watts stretched exponential function and (iii) the determination of the most probable relaxation time. The proposed method was tested using ZnO high-voltage varistors. The ionization energy (0.06 and 0.16 eV) and the electron capture cross-section (∼10−17 and ∼10−16 cm2) of the bulk donor states in two ZnO varistor ceramics were estimated.