The disciplines of vocal pedagogy: towards a holistic approach

This dissertation comprises an exploration of the thesis that a holistic education entailing multi-disciplinary study is essential if classical singers and vocal pedagogues are to be prepared adequately for performance, for their teaching role, and for cooperation in inter-professional relations. The disciplines pertinent to vocal pedagogy are examined, and their varied contributions are discussed with a view to showing the ways in which they are mutually supportive. The case is argued on the basis of an exhaustive analysis of the relevant literature, and is underpinned by my wide professional experience as a soprano, and as a teacher both in primary, secondary and higher education, and in private practice at home and abroad. Starting with a survey of views on vocal pedagogy from biblical and classical times to the present day, important diverse roots are exposed, yielding differing and even conflicting tonal ideals which have a bearing on the consideration of different singing styles, and the interpretation of songs and arias. Ethics and psychology are identified as central to the entire pedagogical process, along with the scientific basis of singing, encompassing acoustics, anatomy and physiology, with special reference to the bearing of the latter two upon vocal health and hygiene. A detailed consideration of singing technique is the centrepiece of the dissertation, building on the scientific basis already presented. The several aspects of technique are discussed, and an understanding of the relations between good technique and scientific awareness is shown to be fundamental to good vocal pedagogical practice. In differing ways all of the disciplines thus far discussed - history, the ethics and psychology, science, vocal technique - contribute to performance, which is the next topic dealt with. In addition, since the evaluation of performance is a question of aesthetics, that branch of philosophy is introduced as a further discipline contributing to the education of the fully equipped singer and vocal pedagogue. While a considerable amount of research has been undertaken by others on the individual disciplines discussed in this dissertation, no study to date has attempted the task of showing the inter-relationships of all of them, and the ways in which together they bear upon classical singing pedagogy. The central theme of the dissertation is that the adoption of a holistic, multidisciplinary approach is of particular benefit to singers and voice teachers, and that such an approach facilitates mutual co-operation between them and other voice professionals

A note on Volterra integral equations and topological dynamics

Topological dynamics theory applied to nonlinear Volterra equation

The unequal efficiency gap : Key factors influencing women farmer's efficiency in Uganda

There is an assumed gap in efficiency between male and female farmers. Identifying the constraints of women farmers causing the gap is essential for improving local food security and well-being. Using stochastic frontier analysis, we compare the efficiency of men, women and jointly managed maize plots in Uganda and look at factors associated with inefficiency of women. Our results show that the average technical efficiency of women is lower than that of men or jointly managed plots. However, in relation to a group-specific frontier, the women are highly efficient. Women's inefficiency is associated with several household features. The overall number of household members has a negative effect on efficiency, suggesting that women are time constrained by the efforts they put into household productive work. There also seems to be an association between efficiency and cash-crop farming, disadvantaging women who more commonly grow crops for household consumption.Peer reviewe

Rapid intravenous rehydration of children with acute gastroenteritis and dehydration: a systematic review and meta-analysis

Background: The World Health Organization (WHO) recommends rapid intravenous rehydration, using fluid volumes of 70-100mls/kg over 3–6 h, with some of the initial volume given rapidly as initial fluid boluses to treat hypovolaemic shock for children with acute gastroenteritis (AGE) and severe dehydration. The evidence supporting the safety and efficacy of rapid versus slower rehydration remains uncertain.Methods: We conducted a systematic review of randomised controlled trials (RCTs) on 11th of May 2017 comparing different rates of intravenous fluid therapy in children with AGE and moderate or severe dehydration, using standard search terms. Two authors independently assessed trial quality and extracted data. Non-RCTs and non-English articles were excluded. The primary endpoint was mortality and secondary endpoints included adverse events (safety) and treatment efficacy.Main results: Of the 1390 studies initially identified, 18 were assessed for eligibility. Of these, 3 studies (n = 464) fulfilled a priori criteria for inclusion; most studied children with moderate dehydration and none were conducted in resource-poor settings. Volumes and rates of fluid replacement varied from 20 to 60 ml/kg given over 1-2 h (fast) versus 2-4 h (slow). There was substantial heterogeneity in methodology between the studies with only one adjudicated to be of high quality. There were no deaths in any study. Safety endpoints only identified oedema (n = 6) and dysnatraemia (n = 2). Pooled analysis showed no significant difference between the rapid and slow intravenous rehydration groups for the proportion of treatment failures (N = 468): pooled RR 1.30 (95% CI: 0.87, 1.93) and the readmission rates (N = 439): pooled RR 1.39 (95% CI: 0.68, 2.85).Conclusions: Despite wide implementation of WHO Plan C guideline for severe AGE, we found no clinical evaluation in resource-limited settings, and only limited evaluation of the rate and volume of rehydration in other parts of the world. Recent concerns over aggressive fluid expansion warrants further research to inform guidelines on rates of intravenous rehydration therapy for severe AG