Institutional Repository | North-West University | NWU: Recent submissions
Now showing items 17041-17060 of 35802
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The validation of single point measurements for the localization of multiple harmonic sources
(IEEE, 2010)Power quality management requires inexpensive and simple methods for electric power quality monitoring. This paper investigates the validity of single point measurements for the localization of sources of waveform distortion ... -
On the assessment of voltage unbalance
(IEEE, 2010)The management of voltage unbalance in a power system is supported by the knowledge on the contribution of a single unbalanced load/source to the total level of voltage unbalance observed at a Point of Common Coupling (PCC) ... -
On the reporting of power quality
(IEEE, 2011)The reporting of power quality (PQ) requires consideration as different users of information on Quality of Supply (QoS) have different needs. Reporting on the compliancy of voltage regulation in terms of a PQ standard can ... -
Practical evaluation of voltage unbalance at a distribution transformer based on 50 Hz negative sequence active power
(IEEE, 2011)The paper investigates the measurement and propagation of voltage unbalance at a distribution transformer. The relations between unbalance factors in voltage and current with the direction of negative sequence fundamental ... -
A practical evaluation of harmonic emission assessment
(IEEE, 2011)This paper reports an evaluation of harmonic emission assessment. The results obtained by the Harmonic Vector Method are correlated to the behavior of harmonic active power by means of synchronized measurements in a ... -
An assessment of the needs of police officials regarding trauma and trauma intervention programmes : a quantitative approach
(Criminological and Victimological Society of Southern Africa (CRIMSA), 2015)As a result of the critical nature of police officials' work, it is of utmost importance that they have direct access to support. The efficacy of the present trauma intervention programmes in the South African Police Service ... -
Mental Health workers' coping strategies in dealing with continuous secondary trauma
(Unisa Press Host: Dept Social Work, UJ, 2015)This study explored the coping strategies of mental health workers (MHWs) who are dealing continuously with traumatised children (younger than 18) and their families/caregivers. A convenience sample was used to recruit ... -
Caregiver-mediated therapy for an adult with visual and intellectual impairment suffering from separation anxiety
(Elsevier, 2015)Background Separation anxiety among intellectually disabled (ID) persons with comorbid visual impairment could be rooted in a weak sense of person permanence. Technology-assisted Therapy for Separation Anxiety (TTSA) ... -
The evaluation of an equine–assisted therapy programme with a group of boys in a youth care facility
(Taylor & Francis, 2015)The goal of this study was to evaluate the efficacy of an equine-assisted therapy programme aimed at improving the psychological well-being of boys in a custodial school of industry. Participants were 39 boys who live in ... -
Perception of social workers regarding life story work with children
(South African Society on the Abuse of Children (SAPSAC), 2015)The aim of this article was to explore how social workers perceived life story work. Narrative therapy was used as the theoretical framework of this study, which followed a qualitative descriptive design. Six registered ... -
A supervision tool to guide postgraduate students during research supervision
(Unisa Press Host: Dept Social Work, UJ, 2015)It is not uncommon for postgraduate students to postpone or terminate their studies due to emotional and/or academic reasons. The purpose of this research–based article is to propose a specific supervision tool ... -
The analysis of voltage and current unbalance by application of active and reactive power in the fundamental frequency negative-sequence components
(IEEE, 2012)The behaviour of the fundamental frequency negative-sequence power components in unbalanced power networks is evaluated for possible information on the relative contribution by the supply and loading network. Previous ... -
Where is the power of the IEEE 1459-2010?
(IEEE, 2014)The integration of the IEEE 1459-2010 power definitions with the IEC 61000-4-30 PQ standard is investigated. A Class A PQ instrument, which record network coherent data with an absolute time uncertainty of less than 100 ... -
Die tragiese geestelike odusse van Lourens Ingelse: Anteunis Janse oor die spirualiteit van die Nadere Reformasie
(Vereniging vir Christelike Hoër Onderwys, 2015)This article reflects on the spiritual pilgrimage of an ordinary Christian farmer, who lived in the Northern part of the Netherlands during the second half of the eighteenth century. His rough character and reformed religious ... -
Semi-mistieke spiritualiteit by Johannes Calvyn en by Abraham Kuyper: die invloed daarvan tot vandag
(Vereniging vir Christelike Hoër Onderwys, 2015)Semi-mystical spirituality has become very popular today. Appealing to their reformed predecessors, some theologians today regard it as an important injection needed for the revitalization of their churches. Others, however, ... -
A deconstruction of the term "revolution"
(AOSIS, 2015)The precise meaning of the concept of (political) revolution remains semantically contested. According to Arslanian (2013:127) this concept “is often used liberally, applied to everything from the ‘Social Media Revolution’ ... -
Guidelines for the appropriate referral of child clients for forensic assessments
(South African Society on the Abuse of Children (SAPSAC), 2015)This article reports on a study which aimed at establishing a guideline for social workers in the offices of the Christian Council for Social Services in the Highveld Synod, in order to facilitate proper referral for ... -
Inter-ethnic differences in genetic variants within the transmembrane protease, serine 6 (TMPRSS6) gene associated with iron status indicators: a systematic review with meta-analyses
(Springer, 2015)Transmembrane protease, serine 6 (TMPRSS6), is likely to be involved in iron metabolism through its pleiotropic effect on hepcidin concentrations. Recently, genome-wide association studies have identified common variants ... -
Disaster recovery experiences of a South African rural farming community
(Taylor & Francis, 2015)This study explored the bush fire disaster experiences and coping of South African farmers. Participants consisted of seven male farmers (6 = White Afrikaans-speaking; 1 = Black Tswana-speaking). Data were collected using ... -
Quality of supply data mining
(IEEE, 2014)Extracting useful network management information from a large volume of QoS data obtained all over a network can be simplified by innovative data mining techniques. The need for QoS expertise is reduced as interactive ...
