Radio astronomy in Africa: the case of Ghana

South Africa has played a leading role in radio astronomy in Africa with the Hartebeesthoek Radio Astronomy Observatory (HartRAO). It continues to make strides with the current seven-dish MeerKAT precursor array (KAT-7), leading to the 64-dish MeerKAT and the giant Square Kilometer Array (SKA), which will be used for transformational radio astronomy research. Ghana, an African partner to the SKA, has been mentored by South Africa over the past six years and will soon emerge in the field of radio astronomy. The country will soon have a science-quality 32m dish converted from a redundant satellite communication antenna. Initially, it will be fitted with 5 GHz and 6.7 GHz receivers to be followed later by a 1.4 - 1.7 GHz receiver. The telescope is being designed for use as a single dish observatory and for participation in the developing African Very Long Baseline Interferometry (VLBI) Network (AVN) and the European VLBI Network. Ghana is earmarked to host a remote station during a possible SKA Phase 2. The location of the country on 5 degree north of the Equator gives it the distinct advantage of viewing the entire plane of the Milky Way galaxy and nearly the whole sky. In this article, we present the case of Ghana in the radio astronomy scene and the science/technology that will soon be carried out by engineers and astronomers.Comment: 6 pages, 3 figures, Full Referred Journal Article accepted for publication in the South African Institute of Physics (SAIP 2014) Conference Proceeding

Socioeconomic Status, Race, Gender, & Retention: Impact on Student Achievement

The purpose of this article is to discuss the impact of socioeconomic status, race, gender, and retention on student achievement. Increasing attention has been paid to the quality of education in the United States as international reports compare the academic achievement of students in this country with others in the world. Many states are basing promotion of students on state assessments. High stakes testing has lead to higher retention rates in several states. It is everyone’s responsibility to ensure that students who are retained do not drop out of school and therefore get left behind

MacWilliams' Extension Theorem for Bi-Invariant Weights over Finite Principal Ideal Rings

A finite ring R and a weight w on R satisfy the Extension Property if every R-linear w-isometry between two R-linear codes in R^n extends to a monomial transformation of R^n that preserves w. MacWilliams proved that finite fields with the Hamming weight satisfy the Extension Property. It is known that finite Frobenius rings with either the Hamming weight or the homogeneous weight satisfy the Extension Property. Conversely, if a finite ring with the Hamming or homogeneous weight satisfies the Extension Property, then the ring is Frobenius. This paper addresses the question of a characterization of all bi-invariant weights on a finite ring that satisfy the Extension Property. Having solved this question in previous papers for all direct products of finite chain rings and for matrix rings, we have now arrived at a characterization of these weights for finite principal ideal rings, which form a large subclass of the finite Frobenius rings. We do not assume commutativity of the rings in question.Comment: 12 page

Terms of Engagement: Consensus or Control in Remote Australian Resource Management?

Community based natural resource management (NRM) has seen a shift in the discourse from participation to engagement, reflecting a focus on increasingly active citizen involvement in management and action. This paper considers this shift in relation to two contrasting theoretical perspectives. The first is deliberative democracy, drawing on Habermas, which emphasises the importance of discussing and rationalising values and actions. The second is governmentality, or ‘governing through community’ which draws on Foucault, emphasising neo-liberal management styles and ‘self-help’. In considering the empirical relevance of these theoretical perspectives, this paper draws on a case study of public engagement in NRM in the Lake Eyre Basin, a remote, inland region of Australia. This research yielded a practical set of “factors for success” for public engagement in remote areas. The findings support the view that, especially in remote regions, public engagement in NRM reflects contrasting goals. We make two conclusions. First, that these contrasting objectives emphasise the tension between deliberative and neo-liberal conceptualisations of engagement; and second, the evidence for neo-liberal interpretations of engagement are stronger than for deliberative interpretations of engagement in the case study region.participation, decentralisation, governmentality, deliberation

Using concept mapping to understand motivational interviewing practice

Purpose Motivational interviewing (MI) has developed considerably since its inception, which may have led to diverse practice across contexts and differential understanding of core principles. Concept mapping is one potential method for offering insight into practitioner awareness, understanding and application of MI. The paper aims to discuss this issue. Design/methodology/approach In total, 29 professionals from a range of disciplines, including counselling, education and health, completed concept maps about MI, following brief training at the UK regional MI interest network. In total, 17 completed maps were submitted for analysis using quantitative and qualitative methods. Findings A total of 186 concepts and 175 propositional links were found within the 17 maps. The most commonly identified concepts were: change, empathy, collaboration, open-ended questions, affirmations, reflections, summaries (OARS), client centred and compassion. The concept maps also suggested differing levels of expertise across network members using concept mapping morphology classification. Research limitations/implications The sample was small scale and located in one region of the UK. Maps were submitted anonymously meaning that participant data could not be matched to the maps. Practical implications Concept mapping is a potentially useful method for auditing practice and developing skills in MI, as well as exploring participants’ understanding of related concepts and therapeutic mechanisms. Social implications MI has a strong evidence-based across a variety of disciplines and contexts. Refining practitioner skills in MI has implications for the integrity of delivery, and improved client outcomes in areas such as substance use, health promotion and educational disaffection. Originality/value This is the first study to investigate concept mapping as a means of understanding MI practice. It has potential implications for training, monitoring, supervision and development in MI practice

Collaborative Educational Experiences through Higher Education-Industry Partnerships

This paper examines the perceptions of mentors and student interns from NASA's Langley Aerospace Research Summer Scholars (LARSS) program in Hampton, Virginia. Data for the current study are from student interns and mentors participating in the 2010, 10-week summer internship. Students are chosen from around the country based upon their applications and mentoring opportunities to participate in a summer program focusing on a range of specialty areas including: aeronautics; earth science research; exploration and flight; systems and concepts; systems engineering; subsonic/transonic testing; supersonic/hypersonic testing; and structures testing. This study presents information on mentors perceptions of academic preparedness brought to the workplace by student interns; student interns perceptions of how the internship helped develop key skill areas; and self-reports from student interns and their mentors about their internship experience

Measurable Prediction for the Single Patient and the Results of Large Double Blind Controlled Randomized Trials

Background: It has been shown that the clinical state of one patient can be represented by known measured variables of interest, each of which then form the element of a fuzzy set as point in the unit hypercube. We hypothesized that precise comparison of a single patient with the average patient of a large double blind controlled randomized study is possible using fuzzy theory. Methods/Principle Findings: The sets as points unit hypercube geometry allows fuzzy subsethood to define in measures of fuzzy cardinality different conditions, similarity and comparison between fuzzy sets. A fuzzy measure of prediction is defined from fuzzy measures of similarity and comparison. It is a measure of the degree to which fuzzy set A is similar to fuzzy set B when different conditions are taken into account and removed from the comparison. When represented as a fuzzy set as point in the unit hypercube, a clinical patient can be compared to an average patient of a large group study in a precise manner. This comparison is expressed by the fuzzy prediction measure. This measure in itself is not a probability. Once thus precisely matched to the average patient of a large group study, risk reduction is calculated by multiplying the measured similarity of the clinical patient to the risk of the average trial patient. Conclusion/Significance: Otherwise not precisely translatable to the single case, the result of group statistics can be applied to the single case through the use of fuzzy subsethood and measured in fuzzy cardinality. This measure is an alternative to

Usability context analysis: a practical guide

The usability of a product is affected not only by the features of the product itself, but also by the characteristics of the users, the tasks they are carrying out, and the technical, organisational and physical environment in which the product is used. In this guide, we use the term 'context' to include all factors which affect the usability of the product, excluding the features of the product itself. We use the term 'product' to represent any interactive system or device designed to support the performance of users' tasks