Speech and language difficulties in children with and without a family history of dyslexia

Comorbidity between SLI and dyslexia is well documented. Researchers have variously argued that dyslexia is a separate disorder from SLI, or that children with dyslexia show a subset of the difficulties shown in SLI. This study examines these hypotheses by assessing whether family history of dyslexia and speech and language difficulties are separable risk factors for literacy difficulties. Forty-six children with a family risk of dyslexia (FRD) and 36 children receiving speech therapy (SLT) were compared to 128 typically developing children. A substantial number (41.3%) of the children with FRD had received SLT. The nature of their difficulties did not differ in severity or form from those shown by the other children in SLT. However, both SLT and FRD were independent risk factors in predicting reading difficulties both concurrently and 6 months later. It is argued that the results are best explained in terms of Pennington's (2006) multiple deficits model

Correlates of externalising and internalising problems in children with dyslexia: An analysis of data from clinical casefiles

© 2019 The Australian Psychological Society Objective: Adopting a socio-ecological perspective, we used data extracted from clinical casefiles to investigate factors associated with externalising and internalising problems in a large, representative sample of children with a diagnosis of dyslexia. Method: This study is a secondary analysis of data collected by the Dyslexia-SPELD Foundation in Western Australia. Casefiles for school-aged children who had received a dyslexia diagnosis in 2014 and 2015 were identified (n = 1,235), and a subset of casefiles were randomly selected for data extraction (n = 454). Of the sample, 58% (n = 262) were male, 42% (n = 192) were female. Ages ranged between 6 and 17 years (M = 12.32, SD = 3.07). Casefiles include results from assessments of literacy-related achievement, as well as parent-reported information on behavioural and socio-emotional development. Results: After controlling for child age, gender, and reading ability, it was found that low self-esteem, difficulties in emotion regulation, and social skills difficulties were all associated with externalising problems. Additionally, low self-esteem, difficulties in emotion regulation, and bullying victimisation were all associated with internalising problems. Peer relationship difficulties were indirectly associated with both externalising and internalising problems through associations with low self-esteem and difficulties in emotion regulation. Conclusion: Self-esteem, bullying victimisation, emotion regulation, social skills, and peer problems are salient correlates of externalising and internalising problems in children with a diagnosis of dyslexia. Implications for intervention are discussed, both universal school-based mental health promotion programs, as well as more targeted programs for children with dyslexia

Protection of World Heritage Settlements and their surroundings : factors affecting management policy and practice

In an increasingly urbanised world, historic settlements have been facing tremendous urbanisation and development pressures. In this context, historic settlements included on the World Heritage List ought to be flagships for urban conservation. This dissertation investigates how effectively the existing protection and management policies under the World Heritage Convention contribute to the protection of historic urban settlements and especially their surroundings. The factors affecting urban settlements, and the responses adopted by the international community for the protection of urban heritage, are investigated – first in relation to urban settlements in general, and then in relation to historic settlements included on the World Heritage List. To get a holistic view of how historic settlements have been protected under the World Heritage Convention, the monitoring mechanisms established under the Convention are examined. The analysis of the results of the first cycle of the Periodic Reporting exercise and of the state of conservation reports resulting from the Reactive Monitoring process provide an overall view of the main issues influencing the protection of World Heritage settlements. To get an overview of the factors affecting the surroundings of World Heritage settlements in particular, the concept of buffer zone – adopted under the World Heritage Convention as the main mechanism for the protection of the surroundings of World Heritage properties – is investigated not only in relation to its use in other disciplines and to the protection of natural protected areas, but also in the nomination files over time. To investigate how historic settlements and their surroundings in particular have been affected by urbanisation and development pressures, and how they have been protected under the World Heritage Convention, four case studies are studied, namely Angra do Heroísmo in Portugal, Olinda in Brazil, Marrakesh in Morocco and the Kathmandu Valley in Nepal. In all four cases I examine how their inscription on the World Heritage List has influenced their protection and that of their surroundings in particular, how the existing managements systems established for their protection have responded to urbanisation and development pressures, and what are the main factors affecting their state of conservation. In addition, as the Kathmandu Valley has received enormous attention under the World Heritage system, this case study is also analysed to obtain an in-depth understanding of how the system has been implemented for the protection of World Heritage settlements. The case studies shed light on five inter-related aspects. First, that the legal and management arrangements adopted for the protection of the World Heritage settlements are not built upon what is considered to be their outstanding universal value, and are insufficient to effectively address existing urbanisation and development pressures. Second, that the factors affecting the state of conservation of World Heritage properties increasingly originate from beyond the properties‘ boundaries, but there is nevertheless no integration of the planning and management arrangements for the World Heritage settlements within their wider urban context. Third, that the surroundings of the World Heritage settlements investigated have continued to undergo considerable change since the time of inscription and are now much more urbanized areas, despite existing legal mechanisms for their protection. Fourth, that although Angra do Heroísmo, Olinda and Marrakesh present similar factors affecting their state of conservation to those identified for the Kathmandu Valley, they have not received the same attention from the World Heritage Committee, pointing to a lack of clarity on the selection process for the follow-up of the state of conservation of a property through Reactive Monitoring. Fifth, in relation to the Kathmandu Valley only, that the involvement of the international community has considerable limitations and needs to be improved. These aspects show that the protection and management policies under the World Heritage Convention are limited, not effectively implemented or enforced, and only address a limited number of the existing needs. The dissertation concludes by articulating how existing trends influencing urban settlements can be more effectively addressed by existing mechanisms under the World Heritage Convention. Finally I bring forward the policy implications deriving from the research findings and suggest broad strategies for improving some of the processes and practices for the protection of World Heritage settlements and their surroundings in particular

Hydrodynamic obstruction to bubble expansion

We discuss a hydrodynamic obstruction to bubble wall acceleration during a cosmological first-order phase transition. The obstruction results from the heating of the plasma in the compression wave in front of the phase transition boundary. We provide a simple criterion for the occurrence of the obstruction at subsonic bubble wall velocity in terms of the critical temperature, the phase transition temperature, and the latent heat of the model under consideration. The criterion serves as a sufficient condition of subsonic bubble wall velocities as required by electroweak baryogenesis.Comment: 18 pages, 4 figures; comments and reference added, published versio

On the data-driven COS method

In this paper, we present the data-driven COS method, ddCOS. It is a Fourier-based financial option valuation method which assumes the availability of asset data samples: a characteristic function of the underlying asset probability density function is not required. As such, the presented technique represents a generalization of the well-known COS method [1]. The convergence of the proposed method is in line with Monte Carlo methods for pricing financial derivatives. The ddCOS method is then particularly interesting for density recovery and also for the efficient computation of the option's sensitivities Delta and Gamma. These are often used in risk management, and can be obtained at a higher accuracy with ddCOS than with plain Monte Carlo methods

New branches in the degradation pathway of monochlorocatechols by Aspergillus nidulans: a metabolomics analysis

A collective view of the degradation of monochlorocatechols in fungi is yet to be attained, though these compounds are recognised as key degradation intermediates of numerous chlorinated aromatic hydrocarbons, including monochlorophenols. In the present contribution we have analysed the degradation pathways of monochlorophenols in Aspergillus nidulans using essentially metabolomics. Degradation intermediates herein identified included those commonly reported (e.g. 3-chloro-cis,cis-muconate) but also compounds never reported before in fungi revealing for 4-chlorocatechol and for 3- chlorocatechol unknown degradation paths yielding 3-chlorodienelactone and catechol, respectively. A different 3-chlorocatechol degradation path led to accumulation of 2- chloromuconates (a potential dead-end), notwithstanding preliminary evidence of chloromuconolactones and protoanemonin simultaneous formation. In addition, some transformation intermediates, of which sulfate conjugates of monochlorophenols/ chlorocatechols were the most common, were also identified. This study provides critical information for understanding the role of fungi in the degradation of chlorinated aromatic hydrocarbons; furthering their utility in the development of innovative bioremediation strategies