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Search Results: 1 - 10 of 311 matches for " Christo Pienaar "
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Optimum Tilt Angles for Photovoltaic Panels during Winter Months in the Vaal Triangle, South Africa  [PDF]
Osamede Asowata, James Swart, Christo Pienaar
Smart Grid and Renewable Energy (SGRE) , 2012, DOI: 10.4236/sgre.2012.32017
Abstract: Optimizing the output power of a photovoltaic panel improves the efficiency of a solar driven energy system. The maximum output power of a photovoltaic panel depends on atmospheric conditions, such as (direct solar radiation, air pollution and cloud movements), load profile and the tilt and orientation angles. This paper describes an experimental analysis of maximizing output power of a photovoltaic panel, based on the use of existing equations of tilt angles derived from mathematical models and simulation packages. Power regulation is achieved by the use of a DC-DC converter, a fixed load resistance and a single photovoltaic panel. A data logger is used to make repeated measurements which ensure reliability of the results. The results of the paper were taken over a four month period from April through July. The photovoltaic panel was set to an orientation angle of 0? with tilt angles of 16?, 26? and 36?. Preliminary results indicate that tilt angles between 26? and 36? provide optimum photovoltaic output power for winter months in South Africa.
Cost-effective Energy Monitoring of Domestic Off-grid PV Systems  [PDF]
Arthur James Swart, Ruaan Schoeman, Christo Pienaar
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B035
Abstract: Domestic off-grid renewable energy systems have become common place in many areas of the world, as humanity seeks to keep abreast with global technological changes and advancements. This paper aims to present a cost-effective energy monitoring system which may be used to analyze and evaluate the operation of a domestic off-grid PV system. Parameters which are monitored include the output voltage and current from a 55 W polycrystalline PV panel. The output voltage and current from a power regulation circuit (which could be a DC-DC converter, solar charger or MPPT) is also monitored with this singular system which incorporates a data logging interface circuit, a data logger and a personal computer.
Symbolism in the Samaria ivories and architecture
DN Pienaar
Acta Theologica , 2008,
Abstract: Situated at the crossroads of great nations, the Land of Israel was exposed to numerous external influences. Samaria, the capital city of Northern Israel, was also situated on a major trade route. Various expeditions uncovered approximately 500 pieces of carved ivory in the palace complex at Samaria. According to the motifs carved in them, these pieces can be divided into two main groups. The first group is categorised by the Harpocrates medallion. The Hah and Isis and Nephtys plaques are also relevant in this case. The second group consists mainly of the so-called Woman at the Window, the Winged Sphinx, Winged Figures in Human Form, Horus and Ma’at, the Lion and Bull Plaques, as well as the Tree of Life Motif in ivory. The latter is also represented in the Proto-Ionic capitals uncovered at many different sites, including Samaria. This article discusses the different cultural influences and motifs, and explains their presence.
The Heart of the Matter: Methodological Challenges in Developing a Contemporary Reading Programme for Monolingual Lexicography, from the Perspective of the Dictionary Unit for South African English*
L Pienaar
Lexikos , 2006,
Abstract: This article argues the importance of the reading programme as the pivotal issue in the lexicographic process. It is essentially a practical article which outlines strategies for developing and implementing a reading programme for monolingual lexicography. The arguments are informed by theory, together with an examination of the data-collection procedures followed by the Dictionary Unit for South African English (DSAE) and a survey of current practice in major English dictionary units around the world, namely the Oxford English Dictionary, the Canadian Oxford Dictionary, the Australian National Dictionary Centre and the New Zealand Dictionary Centre. The reading programme for the DSAE is first defined and contextualized within its mission statement. The article then explores the challenges inherent in sampling contemporary written and spoken English in the South African multilingual context. It is intended to inform the DSAE's intake policy, in terms of the following critical issues: — the definition of South African English, — the monitoring and selection of print, oral and electronic sources, — the excerpting of citations and relevant bibliographic information, and — the recruiting and training of readers. These interlinked aspects of the reading programme have crucial implications for the quality and authority of the monolingual dictionary on historical principles.
Logistiek: Die oorsprong, konseptuele ontwikkeling en betekenis daarvan in hedendaagse gebruik
WJ Pienaar
Lexikos , 2002,
Abstract: Hierdie artikel beskryf die oorsprong van die woord logistiek, stip die ontwikkeling daarvan uit en verklaar die hedendaagse betekenis daarvan. Die ontwikkelingsgang van die begrip word aangedui vanaf die oorsprong daarvan in Grieks, met inagneming van die opeenvolgende opname daarvan in Laat-Latyn, Frans en Nederlands, tot by die huidige gebruik daarvan in Afrikaans. Die vestiging van die Franse logistique as militêre konsep gedurende die Napoleontiese oorlo , en die uitbreiding daarvan tot 'n bedryfsbegrip ná afloop van die Tweede Wêreldoorlog word verduidelik. Die ontwikkelingsgang sedertdien van die betekenis van die konsep in bedryfsverband word bespreek. Eietydse omskrywings van logistiek, betreffende die gebruik daarvan in die bedryfslewe en in die omgangstaal, word verskaf. Vervolgens bied die artikel 'n eietydse definisie van logistiek in bedryfsverband. Ten slotte word aangetoon hoe doeltreffende bedryfslogistiek waarde toevoeg. Sleutelwoorde: bedryfslogistiek, besitnut, bestuur, diens, doelmatigheid, doeltreffendheid, goedere, grondstof, inligting, kli ntediens, kli ntetevredenheid, logistiek, militêre logistiek, nut, pleknut, produk, tydnut, vormnut, waarde
Shylock in Afrika
H Pienaar
Tydskrif vir letterkunde , 2003,
Abstract: No
Aspects Of Land Administration In The Context Of Good Governance
G Pienaar
Potchefstroom Electronic Law Journal/Potchefstroomse Elektroniese Regsblad , 2009,
Abstract: Recent international developments have emphasised the importance of good governance in land administration. Good governance practices are inter alia predictable, open and enlightened policy-making; accountable and transparent processes; a professional ethos that combats corruption, bias, nepotism and personal gain; and strict financial control and management of funding. This paper explores aspects of land administration where public funding and interests necessitate the application of good governance practices. The South African land reform programme is divided in three sub-programmes, namely land restitution, land redistribution and tenure reform. Land reform is a vast subject, based on policy, legislation and case law. Therefore it is impossible to deal with good governance principles over the wide spectrum of land reform. Special attention is however given to the land restitution programme in terms of the Restitution of Land Rights Act 22 of 1994 and tenure reform in the rural areas by means of the Communal Land Rights Act 11 of 2004. The purpose is not to formulate a blueprint for good governance or to indicate which good governance principles will solve all or most of the land tenure problems. It is rather an effort to indicate that policies and procedures to improve good governance in some aspects of land reform are urgently needed and should be explored further. Restitution of Land Rights Act and the Communal Land Rights Act, is extensive and far-reaching. However, many legislative measures are either impractical due to financial constraints and lack of capacity of the Department of Land Affairs, or are not based on sufficient participation by local communities. Land administration should furthermore be planned and executed in the context of global good governance practices. This includes equal protection; clear land policy principles; land tenure principles according to the needs of individuals and population groups; flexible land registration principles to accommodate both individual and communal land tenure; and appropriate institutional arrangements. It is clear that established good governance principles may solve many of the problems encountered in land administration in South Africa. It is a topic that needs to be explored further.
Constitutional provisions regarding juristic persons
GJ Pienaar
Potchefstroom Electronic Law Journal/Potchefstroomse Elektroniese Regsblad , 1998,
Abstract: The interim Constitution of 1993 and the final Constitution of 1996 contain specific provisions applicable to juristic persons. Juristic persons are also entitled to the fundamental rights contained in the Bill of Rights to the extent that these rights are applicable to them. It must be kept in mind that juristic persons have peculiar characteristics and that the fundamental rights of juristic persons differ from those of natural persons. Juristic persons are also under the obligation to respect the fundamental rights of natural persons and other juristic persons to the extent provided for in the Bill of Rights. In the case of juristic persons acting as organs of state the vertical application of the Bill of Rights safeguards the fundamental rights of persons against state action or interference. The circumstances where juristic persons act as organs of state are discussed with reference to case law. Difference of opinion exists regarding the horizontal application of the Bill of Rights, that is the application of the Bill of Rights to private law relationships. In terms of the interim Constitution the Bill of Rights was applied horizontally in an indirect manner. Section 35(3) provided that the common and customary law must be developed by both the Supreme Court and the Constitutional Court to promote the values underlying an open and democratic society based on human dignity, equality and freedom, without completely abolishing the common and customary law. The final Constitution provides in section 8(2) that natural and juristic persons in private law relationships are also bound by the Bill of Rights if, and to the extent that, such rights are applicable, taking into account the nature of the rights and the nature of any duty imposed by such right. The direct horizontal application of the Bill of Rights is, however, limited by section 36. The extent of the rights of juristic persons and limitations on them in private law relationships are investigated, taking into account the right of freedom of association in terms of section 18. The various principles to be taken into consideration in the case of clubs, religious organisations, educational institutions, political organisations and trading and professional institutions are discussed.
Restitutionary Road: Reflecting on Good Governance and the Role of the Land Claims Court
JM Pienaar
Potchefstroom Electronic Law Journal/Potchefstroomse Elektroniese Regsblad , 2011,
Abstract: Although 95% of all claims that had been submitted by 1998 have indeed been processed, a mere 49% of the land that was restored since 1994 housed successful enterprises by the end of 2010. Accordingly, sixteen years into the restitution process the statistics are rather disappointing. Restitution of land as a land reform mechanism is a unique temporal process that involves various role players. This contribution focuses on the role that the Land Claims Court has to play within the context of “good governance”. In this regard the legislative and policy frameworks within which restitution and the Land Claims Court operate, are first set out after which the unique characteristics of the restitution programme are highlighted. Although the main function of the Land Claims Court is to grapple with and adjudicate on legal issues, it also has a role to play in effecting good governance. This may be done by its involvement in the legal process leading up to the finalization of claims by issuing directives, acting as a review forum and by removing land from the restitution process under section 34 of the Restitution Act. However, a more pro-active role may be played by the Court by its involvement in deciding the exact form of restitution or restoration in a particular case. In this regard the Court can find that restitution has to be conditional and that certain requirements have to be met in order for the process to be effective and successful. With reference to Baphiring Community v Uys and Others (Case number LCC 64/1998) it is clear that a pro-active approach would require the Court to engage in difficult, often conflicting, issues and to embark on in-depth investigations and analyses where necessary. KEYWORDS: Land reform; restitution; land claims; good governance; Land Claims Court; directives; restitution options
The interaction between religious freedom, equality and human dignity
G Pienaar
Potchefstroom Electronic Law Journal/Potchefstroomse Elektroniese Regsblad , 2003,
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