Wat is die Woord van God - Skrif, belydenis, prediking?

What is the Word of God: Holy Scripture? The preaching of the Gospel? The Confession?This article argues that while Holy Scripture and preaching may become the Word of God, although never in an unqualified manner, the same can never apply to the Confession. The Confession is the result of theological reflections on the Word and indicative of the parameters within which the preaching should remain without, however, curtailing the prophetic freedom of the preacher in proclaiming the Word. Its function is that of rule of speech for the preaching. Preaching, on the other hand, becomes a proclamation of the Word in an unsurpassable and existentially qualifying manner. Holy Scripture, a human book in more senses than one, is at the same time the Word of God, in that it qualifies its reader existentially - confronting him with the most fundamental questions on the human state and providing the final answers to these

Die funksie van die belydenis in die struktuur van die kerk en die betekenis daarvan vir die predikant

The function of the Confession in the structure of the church and its ministerial implicationsIn this paper it is argued that the church is'nt a monolithical structure but that it is constituted by various constituent elements, all of which are interdependent, interrelated and indispensable. Of these, the most important is the Confession. It constitutes the character and 'personality' of a church and as such is a constituent force in each of the other elements treated here, namely theology, the proclamation of the gospel and church-law. The minister finds himself in an ambivalent relation to the gospel. This is due to the fact that each of the other constituent elements stands in an ambivalent relation to the Confession while the minister is in relation to each of them individually as they stand in relation amongst themselves and to all of them collectively

Die wese van die kerk: 'n Teologiese antwoord op 'n filosofiese vraag

The essence of the Church: A theological answer to a philosophical questionIn this article an attempt is made to define the essence of the church in the most concentrated formula possible. In doing so it is argued that the most essential truth regarding the church resides in the fact that it belongs to the Lord, Jesus Christ. Then it is indicated what relevance this definition has for the formulation and description of the qualities and properties of the church. It is indicated for example that the quality of the essential unity of the church receives quite a different meaning when approached from this angle than when approached from the idea of unity as such

Closed-loop throttle control of a hybrid rocket motor.

Masters Degree. University of KwaZulu-Natal, Durban.Hybrid rocket motors produce thrust by reacting a solid fuel with a liquid oxidizer inside a combustion chamber. This approach has certain advantages over conventional solid propellant rockets including improved safety and the potential for thrust control, while also being less expensive than liquid propellant engines. Liquefying hybrid fuels, such as paraffin wax, regress at a faster rate than the conventional solid fuels like HTPB that are dominated by vaporization at the solid-gas interface. Non-classical theory is still in its infancy, however, and more work is required to validate performance models experimentally, especially where throttling of the oxidizer mass flowrate is incorporated. While hybrid motor throttlabilty remains a subject of considerable interest, there has been little investigation of throttling in motors that use high regression rate, liquefying fuels such as paraffin wax. This study proposes a closed-loop thrust control scheme for paraffin wax/nitrous oxide hybrid rocket motors using a low-cost ball valve as the controlling hardware element. There are a number of advantages to throttling hybrid rocket motors but the most important is to enforce a constant thrust curve throughout the burn. A test facility and laboratory scale hybrid rocket motor utilizing paraffin wax as fuel and nitrous oxide as oxidiser were used for experimental testing. Using a mathematical model of a laboratory-scale hybrid rocket motor, the controller constants for a PID controller were obtained and tested through experimental testing. Open-loop testing was first done in order to determine the control authority of the ball valve over the oxidiser mass flowrate, as well as characterize the oxidiser mass flowrate in relation to each valve angle value. Closed-loop testing was undertaken to verify and refine the controller constants obtained via the laboratory-scale model. The tests prompted a redesign of the injector and additions to the LabVIEW™ controller regime. Using results from the open-loop tests a feed-forward lookup table was developed to allow for the controller to move to a specified angle quickly and thereby remove nonlinearities present in flow control using ball valves. Three successful closed-loop tests were done where the controller causes the thrust of the motor to track a predetermined thrust or chamber pressure set point with a reasonable degree of accuracy. The set-point profile of the first test was a constant thrust throughout the burn while the second test had a ramp set-point profile. The final test used chamber pressure as the feedback variable and had a step-down set-point profile. This study demonstrates that thrust control can be exercised over a paraffin wax/nitrous oxide hybrid rocket motor, using a low-cost ball valve as the control element to modulate the oxidiser mass flowrate

Skrifbeskouing en die Nederlandse geloofsbelydenis

No abstract available

Die belydenis in dogmatiese verband

No abstract available

Wat is 'n sakrament? 'n Poging om 'n antwoord te vind

No abstract available

Die problematiek rondom "gebedsgenesing" en die "genadegawes van genesing" soos wat dit in die pinksterbeweging geleer en beoefen word

No abstract available

Verkiesing en predestinasie

No abstract available