Tectonic and sedimentary history of the Mid-Natal Valley (S.W. Indian Ocean)

The Natal Valley is a sediment-filled marine basin situated between the east coast of southern Africa (Natal) and the Mozambique Ridge. Geophysical and sedimentological techniques are used in a broad geological study of the mid Natal Valley. Major emphasis is directed to: (a) basin history and tectonic evolution; (b) seismic stratigraphy of the basin fill; (c) recent sedimentary processes and responses. General basin morphology is defined by five major physiographic provinces: continental shelf and slope, Tugela Cone, Central Terrace, Mozambique Ridge and deep basin plain. Thinned (20-25 km) continental crust, attenuated and subsided in response to Gondwana rifting and drifting, underlies the Central Terrace, Tugela Cone and Mozambique Ridge. Southern margins of the Central Terrace and Tugela Cone are cored by a series of subsea floor ridge and pinnacle complexes (Naude, East Tugela and South Tugela Ridges). Geochemical analyses of East Tugela Ridge basalts suggest a transitional origin but with continental affinities. These volcanic marginal ridges may approximately delineate the continental-oceanic crust boundary (COB) in the Natal Valley. To the south, the deep basin plain is underlain by oceanic crust.The Natal Valley is a sediment-filled marine basin situated between the east coast of southern Africa (Natal) and the Mozambique Ridge. Geophysical and sedimentological techniques are used in a broad geological study of the mid Natal Valley. Major emphasis is directed to: (a) basin history and tectonic evolution; (b) seismic stratigraphy of the basin fill; (c) recent sedimentary processes and responses. General basin morphology is defined by five major physiographic provinces: continental shelf and slope, Tugela Cone, Central Terrace, Mozambique Ridge and deep basin plain. Thinned (20-25 km) continental crust, attenuated and subsided in response to Gondwana rifting and drifting, underlies the Central Terrace, Tugela Cone and Mozambique Ridge. Southern margins of the Central Terrace and Tugela Cone are cored by a series of subsea floor ridge and pinnacle complexes (Naude, East Tugela and South Tugela Ridges). Geochemical analyses of East Tugela Ridge basalts suggest a transitional origin but with continental affinities. These volcanic marginal ridges may approximately delineate the continental-oceanic crust boundary (COB) in the Natal Valley. To the south, the deep basin plain is underlain by oceanic crust

Constructing a Categorical Framework of Metamathematical Comparison Between Deductive Systems of Logic

The topic of this paper in a broad phrase is “proof theory . It tries to theorize the general notion of “proving something using rigorous definitions, inspired by previous less general theories. The purpose for being this general is to eventually establish a rigorous framework that can bridge the gap when interrelating different logical systems, particularly ones that have not been as well defined rigorously, such as sequent calculus. Even as far as semantics go on more formally defined logic such as classic propositional logic, concepts like “completeness and “soundness between the “semantic and the “deductive system is too arbitrarily defined on the specific system that is applied to for it to carry as an adequate definition. What we shall do then is come up with an adequate definition for a characterization of every logic that one has worked with, and show what can be done with it for a few basic logical systems that include classic propositional logic, intuitionistic propositional logic and intuitionistic sequent calculus. To make this definition work with eloquence, we go the category theory route of constructing a category with objects that correspond to collections of logical formulae and arrows that correspond to deductions from one such collection to another

Evaluation of the impact of the DFE investment in initiatives designed to improve teacher workforce skills in relation to SEN and disabilities: 1st interim report

"This is the 1st Interim Report of a longitudinal study to evaluate the impact of investment by the Department for Education (DfE) to improve teacher workforce skills in relation to special educational needs and disabilities (SEND). The evaluation started in December 2008 and this report covers work carried out over the period January 2009 – July 2010. The evaluation continues until March 2011." - Page 1

Responsible participation and housing: restoring democratic theory to the scene

Tensions between individual liberty and collective social justice characterise many advanced liberal societies. These tensions are reflected in the challenges posed for representative democracy both by participatory democratic practices and by the current emphasis on (so-called) responsible participation. Based on the example of ‘community’ housing associations in Scotland, this paper explores these tensions. It is argued that the critique of responsibility may have been over-stated – that, in particular, ‘community’ housing associations offer the basis for relatively more inclusive and effective processes of decision-making than council housing, which relies on the traditional processes and institutions of representative local government for its legitimacy

Lead and Attention-Deficit/Hyperactivity Disorder: A Meta-Analysis

Attention-Deficit/Hyperactivity Disorder (ADHD) is thought to have a significant neurological component, and several brain structures have been implicated. Environmental variables like lead have been shown to affect brain structures, which in turn impacts cognitive development and behavior. Some studies have begun to associate environmental variables like lead with the inattentive and hyperactive-impulsive symptoms of ADHD. This meta-analysis examined the association between different components of ADHD (including attention problems and hyperactivity/impulsivity) and level of lead exposure in children and adolescents. Articles focusing on the association between lead and inattention or hyperactivity-impulsivity symptoms were gathered from the online databases PsycINFO and Medline. These articles were then coded for content, including the methods used to assess lead exposure, the type of ADHD symptoms examined, the methods used to assess ADHD, gender of participants, average age of participants, year of publication, and sample size. These variables were analyzed using meta-analytic procedures. It was predicted that a medium sized association exists between lead burden and the ADHD symptom sets of inattention and hyperactivity impulsivity. Furthermore, it was predicted that the method of lead burden assessment, particularly the use of hair samples (as opposed to the use of blood, bone, or teeth samples) would moderate the association by causing the effect to appear larger than that of the other methods of assessment. It was also predicted that the year of publication would moderate the association between lead burden and components of ADHD, as mean lead burden has decreased over the last few decades. The meta-analysis of 29 studies with a total N of 12,322 subjects and published between 1974 and 2010 revealed that a moderate association (r = .19) exists between lead burden and inattention as well as lead burden and hyperactivity-impulsivity. Neither method of lead burden assessment nor year of publication moderated the lead and inattention or lead and hyperactivity-impulsivity association. Sample size moderated the association between lead and total ADHD ratings, but this effect vanished following the removal of three outliers. Although this metaanalysis contained several limitations, it provided important information regarding the etiology, treatment, and prevention of ADHD and can be used to guide future research of the lead-ADHD symptomatology association. Doctoral dissertation: http://aquila.usm.edu/dissertations/765

Does Video Game Use Exacerbate the Relation Between Neurophysiological Deficits and ADHD Symptoms in Children and Adolescents?

Attention-deficit/hyperactivity disorder (ADHD) is diagnosed based on behavioral symptoms but is thought to have a significant heritable neurological basis, and several brain structures have been implicated. Recent research has focused on the role of environmental factors that may influence the behavioral expression of inattention and hyperactivity-impulsivity in children and teens, particularly when a biological predisposition exists. This study sought to broaden the literature base by examining the extent to which one environmental factor—video game use—moderated the relation between neuropsychological deficits in attention and inhibition and the behavioral symptoms of ADHD. It was hypothesized that gaming frequency and duration as well as deficits in neuropsychological functioning would relate positively to ADHD symptoms. Twenty-five participants (age 10 to 17 years) recruited from the community were administered four neuropsychological tests of attention and behavioral disinhibition and reported on gaming habits while parents completed measures of ADHD symptoms and also reported on the child’s video gaming habits. Moderated multiple regression analyses were used to examine the moderating effects of gaming frequency and gaming duration on the association between neuropsychological deficits and ADHD symptom domains beyond control variables (i.e., age, gender, race/ethnicity, family income, IQ). Gaming duration was significantly related to symptoms of inattention. Neuropsychological deficits were not significantly related to symptoms of inattention or hyperactivity-impulsivity. However, the interaction of gaming frequency and sustained attention deficits predicted significant variability in inattention, and the interaction of gaming frequency and set shifting deficits significantly predicted symptoms of hyperactivity-impulsivity. These findings underscore the importance of continued research on environmental factors, such as video game use, that may exacerbate a biological predisposition for ADHD symptoms in children. Masters thesis: http://aquila.usm.edu/masters_theses/238

Bibbies, salinity and a question of balance

This book is designed to be used in conjunction with the manual \u27Salinity in the classroom\u27. Published with the assistance of Greening Australia Western Australia, Department of Conservation and Land Management, Department of Education Western Australia.https://researchlibrary.agric.wa.gov.au/books/1017/thumbnail.jp