Radio Frequency Interference /RFI/ design guide for aerospace communications systems

Radio frequency interference design guide for aerospace communications system

Controlling the composition of a confined fluid by an electric field

Starting from a generic model of a pore/bulk mixture equilibrium, we propose a novel method for modulating the composition of the confined fluid without having to modify the bulk state. To achieve this, two basic mechanisms - sensitivity of the pore filling to the bulk thermodynamic state and electric field effect - are combined. We show by Monte Carlo simulation that the composition can be controlled both in a continuous and in a jumpwise way. Near the bulk demixing instability, we demonstrate a field induced population inversion in the pore. The conditions for the realization of this method should be best met with colloids, but being based on robust and generic mechanisms, it should also be applicable to some molecular fluids.Comment: 9 pages, 5 figure

Investigation of dynamic stresses in detona- tion technical note no. 7

Axial and hoop stress calculation in blast loaded thin walled cylindrical pressure vessel

VHF discharges in storm cells producing microbursts

An experiment was carried out in which 3-D mapping of VHF sources was compared to a 3-D description of the reflectivity and dynamics of associated cloud cells observed by a radar network. Data from 61 microbursts were analyzed and it was found that, in 93 pct. of the cases, electrical activity precedes outflow development. The results confirm that the peak in intracloud activity precedes the maximum value of the outflow

Family law and "the great moral public interests" in Victorian Cape Town

In the wake of the mineral revolution, and the Cape Colony’s attainment of responsible government, Cape Town’s population doubled in the nineteenth century’s latter years. Its largely British ruling class, seeing opportunities for wealth and a greater significance in empire and world, sought to construct a social order conducive to those goals. Faced with increasing ethnic heterogeneity, gender imbalance due to the numbers of male immigrants, and frustration in combating the endemic poverty and slums, city fathers and their closest colleagues – doctors, clergy – perceived the way forward in terms not of extending rights but of moral reform. This article carries the ongoing investigation of family life and law in Cape Town through the Victorian period. It examines legal enactments and social developments where they impacted on marriage, divorce, concubinage and related matters, with particular reference to the welfare of children and those born out of wedlock

South African congenital disorders data, 2006 - 2014

Background. The National Department of Health in South Africa (SA) routinely collects congenital disorder (CD) data for its national CD surveillance system. The current system has been implemented since 2006, but no reports on the data collected, methodology, achievements or challenges have been published to date.Objectives. To ascertain the effectiveness of the current national CD surveillance system and its implementation.Method. A descriptive, retrospective study using an audit of the current database was undertaken to evaluate the number of notifications received, types of CDs reported and the quality of reporting across SA for data received from 2006 to 2014.Results. A total of 14 571 notifications were received, including 13 252 CDs and 1 319 zero notifications, across all nine provinces. Commonly reported CDs included Down syndrome, cleft lip and palate, talipes equinovarus, neural tube defects and albinism.Conclusions. The major challenges identified included erratic compliance by health facilities and a lack of healthcare providers trained in human genetics related to CDs. This has led to misdiagnosed and undiagnosed CDs, collectively resulting in under-reporting of cases by >98% during the review period. Owing to limited human and financial resources, it is recommended that the surveillance system be modified into an electronic format. This should be piloted alongside relevant training in specific sentinel sites, to improve data coverage and quality for further evaluation

Contribution of congenital disorders to under-5 mortality

No Abstract

Contribution congenital disorders to neonatal mortality in South Africa

No Abstrac

Review of the 2015 Guidelines for Maternity Care with relevance to congenital disorders

The 4th edition of the Guidelines for Maternal Care in South Africa published by the National Department of Health in 2015 was evaluated with relevance to the care and prevention of congenital disorders (CDs). Disparate terminology is used for CDs  throughout the guidelines, and overall less detail is included on CDs compared with the previous edition. This demonstrates a lack of awareness around the growing health need and contribution of CDs to the disease burden in South Africa (SA). Referrals to medical genetic services in the guidelines for mothers of advanced maternal age and other high-risk categories do not take into account the insufficient capacity available for  screening and diagnosis of CDs. This highlights the lack of consultation with the  medical genetics sector during the development of the guidelines. To respond to the Sustainable Development Goals by 2030, CDs must be integrated comprehensively at all levels of healthcare in SA

Constitutional, legal and regulatory imperatives for the renewed care and prevention of congenital disorders in South Africa

Medical genetic services for the care and prevention of congenital disorders have declined significantly in recent years due to competing health priorities, with previously developed services becoming compromised. With an infant mortality rate of 28/1 000 live births, South Africa (SA) has passed the threshold of 40/1 000 when such services should be implemented. This article outlines the international background and SA legislative framework for medical genetic services and their implementation. International, regional and national conventions, legislation, and policy were studied for relevance to genetic services and their implementation was evaluated, including a comparison of sector capacity between 2001 and 2015. A comprehensive legislative and regulatory framework exists in SA for the provision of medical genetic services, but implementation has been fragmented and unsustained. Congenital disorders and genetic services are not prominent in national strategies and excluded from interventions aimed at combating child mortality and non-communicable diseases. Capacity today is at a lower level than in 2001. The failure to recognise the burden of disease represented by congenital disorders is the underlying reason for the implementation and service shortfall. Child mortality rates have stagnated since 2011 and can be significantly further reduced by prioritising healthcare issues other than HIV/AIDS, including congenital disorders. It is now an imperative that SA responds to World Health Assembly Resolution 63.17 and prioritises congenital disorders as a healthcare issue, providing services to uphold the dignity and human rights of the most vulnerable members of society