Jenny Castle, Michael Rutter, Celia Beckett, Emma Colvert, Christine Groothues, Amanda Hawkins, Jana Kreppner, Thomas O'Connor, Suzanne Stevens and Edmund Sonuga‐Barke
Service use between six and 11 years of age is reported for children adopted from Romania into UK families, and compared with that for children adopted within the UK before six…
Abstract
Service use between six and 11 years of age is reported for children adopted from Romania into UK families, and compared with that for children adopted within the UK before six months of age. Between six and 11, there had been only one adoption breakdown, and about one in ten couples experienced a marital breakdown. Apart from continuing concerns over hepatitis B carrier status in a small number of children, physical health problems were not a prominent feature. By contrast, nearly one‐third of the children from Romania placed in UK families after the age of six months received mental health services provision ‐ a rate far higher than the 11 to 15% in the groups adopted before the age of six months. Such provision was strongly related to research assessments of mental health problems and largely concerned syndromes that were relatively specific to institutional deprivation (quasi‐autism, disinhibited attachment and inattention/overactivity). There were similar differences between the UK adoptees and the adoptees from Romania entering the UK after six months of age in major special educational provision and, again, the findings showed that the provision was in accord with research assessments of scholastic achievement. The between group differences for lesser special educational provision were much smaller and there was some tendency for the early adopted groups to receive such provision for lesser degrees of scholastic problems than the children adopted from Romania who entered the UK after six months of age. The policy and practice implications of the findings are briefly discussed.
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J. González‐Sánchez, L. Dzib‐Pérez, E. Garcia‐Ochoa, G. Canto and M. Sosa‐Baz
The purpose of this paper is to quantitatively assess the pit growth rate on AISI 304L and AISI 316 austenitic stainless steels in natural seawater and 3.5 wt.% NaCl solutions…
Abstract
Purpose
The purpose of this paper is to quantitatively assess the pit growth rate on AISI 304L and AISI 316 austenitic stainless steels in natural seawater and 3.5 wt.% NaCl solutions through electrochemical measurements during the potentiostatic growth of pits.
Design/methodology/approach
A quantitative characterisation was carried out based on chronoamperometric measurements. The volume of dissolved metal per pit was calculated from the charge registered and Faraday's law, considering both, hemispherical and semi‐elliptical pit shapes and the density of the steels. Empirical growth laws for maximum pit depth as a function of polarisation time were obtained and compared with pits volumetric profile obtained from optical microscopy analysis and mechanical removal of material on both steels.
Findings
Electrochemical‐based calculations of localised metal dissolution per pit present acceptable fit with the real volume of dissolved metal on hemispherical pits.
Originality/value
The paper presents the quantitative relationship of the corrosion pit growth rate of stainless steels in chloride containing solution determined by chronoamperometry (electrochemical technique) through the Faraday law's, with the mechanical removal of material (pit profile) through the density of metal.
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J.E. Castle and H.G. Masterson
Introduction A STUDY of the detailed morphology of corrosion films formed on metal often leads to an interpretation of the observed rate of corrosion based on a physical model of…
Abstract
Introduction A STUDY of the detailed morphology of corrosion films formed on metal often leads to an interpretation of the observed rate of corrosion based on a physical model of the diffusion processes by which the oxide grows. This is particularly valuable, for example, in deciding whether an abrupt change in rate of corrosion of a metal or an alloy corresponds to cracking of the oxide film or, perhaps, to formation of a new oxide phase.
The Central Electricity Research Laboratories (CERL) at Leatherhead is the largest and longest established of the research centres of the Central Electricity Generating Board. Its…
Abstract
The Central Electricity Research Laboratories (CERL) at Leatherhead is the largest and longest established of the research centres of the Central Electricity Generating Board. Its staff numbers about seven hundred, three hundred of whom are professional scientists, and their programmes cover research into generation of electricity by coal‐ and oil‐fired power stations, and into transmission and distribution. CERL's activities include those as diverse as magneto‐hydrodynamics and the microbiology of soils; the dispersion of plumes from high chimneys and the basic physics of brittle fracture in metals. Three quarters of its work and almost all the corrosion research relates to generating electricity, although it has some of the best facilities in the world for studying the transmission of electricity at very high voltages, and the first corrosion problem it tackled was on steel cored aluminium conductors.
L. John Berchmans, S. Venkatakrishna Iyer, V. Sivan and M.A. Quraishi
The influence of a newly synthesised organic compound on the inhibition of corrosion of arsenical aluminium brass in a NaCl solution has been investigated using weight loss…
Abstract
The influence of a newly synthesised organic compound on the inhibition of corrosion of arsenical aluminium brass in a NaCl solution has been investigated using weight loss measurements, potentiodynamic polarization studies and impedance measurements. Different corrosion kinetic parameters obtained from polarisation studies reveal that the inhibition of corrosion of arsenical aluminium brass in NaCl is under mixed control. UV‐reflectance, X‐ray diffraction and scanning electron microscopic studies have also been carried out to understand the mechanism of inhibition of corrosion, and also the morphological changes on the surface of the alloy. The adsorption of this compound on the metal surface from 3.5% NaCl solution is found to obey Temkin’s adsorption isotherm.
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Tengwei Zhu, Feng Huang, Jing Liu, Qian Hu and Wei Li
This paper aims to investigate the atmospheric corrosion mechanism of structural materials to develop more advanced corrosion-control technologies and cost-reduction strategies…
Abstract
Purpose
This paper aims to investigate the atmospheric corrosion mechanism of structural materials to develop more advanced corrosion-control technologies and cost-reduction strategies. As a second phase in steels, the non-metallic oxide inclusions are considered to not only affect the mechanical properties of steel but also the corrosion resistance of steel. So, an important research goal in this paper is to investigate the indoor accelerated corrosion kinetics of Q450NQR1 weathering steel, analyzing the galvanic polarity of different inclusions in electrochemical corrosion microcell between the inclusion and steel matrix and then elucidating the influence mechanism of inclusions on corrosion resistance of weathering steel.
Design/methodology/approach
Two methods of inclusion modification are usually used to improve the properties of weathering steel: one is calcium treatment on aluminum killed steel and the other one is rare earth (RE) modification. Wet/dry cyclic immersion corrosion test field emission scanning electron microscopy (FE-SEM) metallographic optical microscope.
Findings
The indoor accelerated corrosion kinetics of Q450NQR1 weathering steel could be divided into two stages with different log (thickness loss, D)-log (time, t) fitting functions, and the effect of inclusions on the corrosion resistance of Q450NQR1 weathering steel was only reflected in the initial stages of corrosion. The inclusions of CaS in Ca-modified test steel and RE oxides and sulfides in RE-modified test steel were preferentially dissolved in acid media, slowing down the corrosion rate of steel matrix, but the non-metallic inclusion Al2O3 may accelerate the corrosion rate of the steel matrix as a form of differential aeration corrosion.
Originality/value
The effects of inclusions on corrosion resistance of Q450NQR1 weathering steel was investigated by dry–wet cycle immersion test and FE-SEM. The effect of inclusions on the corrosion resistance of Q450NQR1weathering steel was only reflected in the initial stages of corrosion. The inclusions of CaS in Ca-modified test steel and rare earth (RE) oxides and sulfides in RE-modified test steel were preferentially dissolved in acid media, slowing down the corrosion rate of steel matrix, but the non-metallic inclusion Al2O3 may accelerate corrosion rate of the steel matrix as a form of differential aeration corrosion.
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Anass Rahouti, Sélim Datoussaïd and Thierry Descamps
This paper aims to focus on the combination of fire- and agent-based modelling approaches to assess the level of safety of a multi-storeyed building case study.
Abstract
Purpose
This paper aims to focus on the combination of fire- and agent-based modelling approaches to assess the level of safety of a multi-storeyed building case study.
Design/methodology/approach
For an existing building to be occupied such as the engineering student dormitory of Mons (Belgium), engineers must establish, among the other things, that the building affords a sufficient level of safety during fire incident. This can be verified in accordance with prescriptive- and performance-based methodologies. The performance-based approach consists on using simulation tools such as fire dynamics simulator with evacuation to ensure/verify the level of safety required. In this paper, a model case study was built and then various scenarios have been implemented to answer some safety questions.
Findings
For this building layout, the results demonstrate that combining different egress components (i.e. stairs and outdoor ladders) has a negative impact on the evacuation process than using only the stairs to evacuate the building; phased evacuation strategy will not necessarily lead to faster evacuation; adding fire doors in the stairs and between the floors has a beneficial effect on the evacuation process.
Originality/value
This case study proposes some recommendations about adapted evacuation strategy and investments to improve the safety of high-rise student’s dormitory in case of fire.
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Ameneh Soleimani, Fatimah Fahim Nia, Nader Naghshineh and Adel Soleimani Nejad
The present research is aimed at presenting a framework for the reuse of research data in Iran through applying the United Nations Development Program (UNDP).
Abstract
Purpose
The present research is aimed at presenting a framework for the reuse of research data in Iran through applying the United Nations Development Program (UNDP).
Design/methodology/approach
The research at hand has a mixed methods design. In the qualitative section, the authors first carried out meta-synthesis and then an interview was conducted. Likewise, in the quantitative section, the reliability of the recommended framework was measured through carrying out a survey. Finally, the framework for data reuse was presented in five dimensions, namely human, organizational, policies and laws, technical, implementation and analysis.
Findings
Through structural equation modeling, the fitness of the framework was confirmed, and it was found out that the dimensions of policies, human and organizational played more prominent roles in the explanation of the framework in comparison with the other two dimensions.
Originality/value
Research studies in the area of data reuse have been conducted either quantitatively or qualitatively and in most of them interviews or questionnaires were used as tools for collecting data; however, due to the nature of this area and its relatively new literature in Iran, it is necessary to use mixed methods in order to be able to arrive at a proper understanding of this concept using both quantitative and qualitative approaches.